Note: Descriptions are shown in the official language in which they were submitted.
132~799 ~
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This invention relates to a cardboard web feeding device
for a corrugator, more particularly to a cardboard web
feeding device which can reduce the time to be required for ~
loading or carrying out a cardboard web roll compared with a ~ -
cardboard web feeding device of mill roll stand system ~ ~ -
wherein a conveyer for transporting the cardboard web rolls
is disposed at an outer area relative to each of two pairs of
swing arms, respectively.
Fig. 1 shows schematically a perspective view of a web
feeding device according to a preferred embodiment of this
invention.
.:
Fig. 2 shows a front view of the web feeding device
shown in Fig. 1 disposed below a splicer.
Fig. 3 shows a plan view of an exemplary layout pattern
where the web feeding device shown in Fig. 1 is installed in
a factory, in which a wall of the factory locates by the
driving zone in the line of corrugator.
Figs. 4(a) to (d) illustrate an operation order with
passage of time when the web feeding device shown in Fig. 1
is actuated.
Fig. 5 shows a flow chart with passage of time when the
web feeding device shown in Fig. 1 is actuated.
Fig. 6 and Fig. 7 each show another exemplary layout
pattern when the web feeding device shown in Fig. 1 is
installed in a factory.
Fig. 8 shows in perspective view a schematic
constitution of a carry-in/out conveyer, using a pallet for
carrying web rolls.
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... ' .; ,,. ,~,, .. ,, , , ,.. ' ,.. ..... .. . . .
i32479~ ~
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Fig. 9 shows in front view a schematic constitution of a
lifter mechanism for loading a pallet thereon.
Fig. 10 shows in front view a layout pattern of a web
roll transporting conveyer.
Fig. ll(a) shows a vertical cross-sectional view of a
portion for relaying a turntable with respective conveyers:
wherea~ Fig. ll(b), a vertical cross-sectional view of the
turntable.
Fig. 12 shows in plan view another exemplary layout
pattern when the web feeding device according to this
invention is installed in a factory.
Fig. 13 showsi schematically a perspective view of the
web feeding device according to another embodiment of this
invention.
. .
Fig. 14 is a front view of the web feeding device shown
in Fig. 13 disposed below a splicer.
Figs. 15(a) to (d) illustrate an operation order with
passage of time when the web feeding device shown in Fig. 13
is actuated.
Fig. 16 shows schematically, in front view a major - -
portion of a variation of the embodiment shown in Fig. 13.
Fig. 17 shows a flow chart with passage of time when the
web feeding device shown in Fig. 13 is actuated.
Fig. 18 shows schematically a perspective view of the
web feeding device according to another embodiment of this ~
invention. ~ -
13%~7~
- lb -
Fig. 19 further shows schematically a perspective view
of the web feeding device according to another embodiment of
this invention.
Fig. 20 shows in plan view an exemplary layout pattern
when the web feeding device shown in Fig. 19 is installed in
a factory.
Fig. 21 shows schematically a perspective view of a
prior art mill roll stand.
Fig. 22 shows schematically a front view of the mill -
roll stand shown in Fig. 21.
There have widely been used corrugators having a
constitution wherein a corrugating medium is allowed to have
a co~rugation with a desired pitch size; said medium is then
pasted together with a liner at the crests of corrugation ~
using an adhesive to form a single-faced corrugated board ~-
sheet; and the thus obtained single-faced corrugated board -~
sheet is further pasted with a back liner to form a double-
faced corrugated board sheet. In such type of corrugators, a
single facer for forming a single-faced corrugated board
sheet and a double facer for pasting the thus formed single-
faced corrugated board sheet with a back liner are used as
main devices. Further, indispensable as incidental
equipments are cardboard web feeding devices for feeding
cardboard webs such as corrugating medium, liner and back
liner (these cardboard webs are hereinafter referred to as
; ~web").
These webs are loaded to web feeding devices, in the
form of rolls each having predetermined diameters taken up
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around core paper tubes (hereinafter referred to as "web
rollsn), from which the webs are delivered or fed out.
Further, in accordance with the order change in the cor-
rugated board sheet to be formed during the process of
prsduction, the web rolls are removed from the web feeding
devices and loaded on conveying means such a~ a flat car
etc. to be carried out to a specified stockroom.
As a prior art web feeding device to be employed in a
corrugator, a mill roll stand of so-called swing arm
system as shown in Fig. 21 is widely known. The mill roll
stand shown with the numeral 10 comprises two pair~ of
swing arms 13, each pair comprising right and left arms
being connected to horizontal pivotal shafts 11 and 12,
respectively, by means of splines. The respective arm~ 13
have a center block 16 at the tip such that it may oppose
its counterpart provided on the other arm 13, and can be
fitted into the end portions of a paper tube 15 of a web
roll 14.
Carry-in/out tracks 17 are defined on the ground of the
factory site, extending from the mill roll stand 10 toward
two opposing directions, for carrying the web rolls 14 to
and from said mill roll ~tand. These carry-in/out tracks
17 each comprises a pit formed by digging the ground of
the factory site down to a predetermined depth to extend
parallel to the pivotal shafts 11 and 12, to which pit a
flat car 18 is disposed such that it can travel freely
along said pit. The flat car 18 has a table 19 on the top
for loading the web roll 14 thereon, and only the table 19
appears above said pit.
To achieve loading of a web roll 14 onto one pair of swing
arms 13 supported by the right side pivotal shaft 12 in
~aid mill roll stand 10, the flat car 18 carrying the web
roll 14 thereon is allowed to travel along the right side
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~i . , ., .,. .,, , . . .. ,. ~ . ,,, .. ., .. .. ,.. ,. ., ~ ,... ... . .. . ..
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carry-in/out track 17 until i~ reache~ below the swinging
loci of said swing arms 13; wherein the swing arms 13 are
spaced from each other, and in this state the right side
pivotal shaft 12 is turned clockwise until the center
blocks 16 may be aligned with the center of the paper tube
15 of the web roll 14.
Subsequently, the swing arms 13 are moved closer to each
other to effect chucking of the paper tube 15 of the web
roll 14 by means of the center blocks 16, and then the
arms 13 are swung counterclockwise upwardly, whereby
loading of the web roll 14 (also referred to as "web
settingn) is achieved. Likewise~ the same procedures can
be applied to the other pair of swing arms 13 supported on
the left side pivotal shaft 11 to load another web roll 14
thereto. The web delivered from the web roll 14 loaded -
onto the one pair of the swing arms 13 i8 fed to a pre-
determined portion of a corrugator not shown.
.
When the web roll 14 loaded onto the swing arms 13 is
unloaded from said arm for returning to the stockroom, or
the web roll 14 under loading is replaced with another web
roll 14 of a different standard in accordance with the
order change during the operation of the line, the 6wing
~;~ 25 arms 13 locating at its upper position i8 swung downward
until they may reach immediately above the flat car 18
which i~ waiting on the carry-~n/out track 17. Next, the
arms 13 are opened to release chucking against the web
roll 14 to load said web roll 14 onto the table 19 of the
flat car 18. The swing arms 13 are then swung upward to
assume again the upper position and moved farther from
each other to wait for the next web roll 14 to be chucked
therebetween. Sub6equently, the flat car 18 carrying the
~ web roll 14 loaded thereon retracts the carry-in/out track
-~ 35 17 toward the 6pecified stockroom.
:, '.:
`; ~32~
-- 4 --
When a new web roll 14 is successively loaded, the flat
car 18 carrying the web roll 14 thereon travels along the
carry-in/out track 17 until it reaches below the swinging
loci of the swing arms 13, and loading of the web roll 14
against the arms 13 is achieved in the order as described
above.
Thus, in a web feeding device of a conventional mill roll
stand system wherein a conveyer for transporting web rolls
is disposed at an outer area relative to each of the two
pairs of swing arms, respectively, the swing arms 13 are
swung diagonally downward after a new web roll 14 is
carried in, to effect centering of the center blocks 16
with the paper tube 15 of the web roll 14, and then both
arms are moved closer to each other to effect chucking of
the web roll 14 therebetween, as described above. Next,
the two arms 13 are swung diagonally upward to complete
loading of the web roll 14.
On the other hand, when a web roll 14A supported by the
two swing arms 13 under delivery is replaced with a dif-
ferent new web roll 14B, chucking against the web roll 14A
i~ released after the two swing arms 13 are swung diago- -
~-~ nally downward. While the former web roll 14A i~ carried
out after the arms 13 are swung diagonally upward, these
arms 13 must be waiting in the above posture, i.e. in an
upwardly tilted posture, for the time until carrying in of
the new web roll 14B is completed. After the new web roll-
14B is carried in, the swing arms 13 are swung diagonally
downward to effect centering of the center blocks 16 with
the paper tube 15 of the web roll 14B. Subsequently, the
two arms 13 are moved closer to each other to chuck the
web roll 148 therebetween, and then they are swung upward
again to achieve loading of the new web roll 14B. -~
Thus, for the replacement of web rolls, lt is necessary
-
~2~793 : -
not only to reciprocate the swing arms horizontally along the
pivotal shaft but also to allow them to be waiting at the
said position in an upwardly tilted posture for the time
until completion of carrying out of the former web, roll and :
carrying in of the new web roll. Accordingly, under the -
present circumstances, the web setting operation requires. .
quite a lot of time loss. Therefore, in the corrugated board ~.
sheet production industries in which there is a necessity for ~.
coping with freguent order change due to small lot
productions, reduction of the time cycle to be required for :
the replacement of web rolls is extremely important. In this
respect, no prior art web feeding device could sufficiently
meet such demand. ~ -
.,
In one aspect, the invention provides a web feeding
device for a corrugator comprising: a mill roll stand
consisting of two swing arm mechanisms, each having a pair of
swing arms supported on a pivotal shaft which can be turned
with a predetermined angle to the positive and negative
directions relative to the perpendicular line extending
upwardly from said pivotal shaft, disposed in such a way that
the pivotal shafts thereof may be parallel to each other; a
conveyer for carrying out the web rolls disposed between said
. two swing arm mechanisms to extend parallel to said pivotal
shafts; and web roll carry-in.conveyers disposed at outer
areas of said two swing ar~ mechanisms, respectively, and
containing a reciprocatable conveyer system extended parallel
to said pivotal shaft and a pallet for loading a web roll~ .
thereon to be removably mounted on said conveyer driving .
~: system; and a lifter for ~eparating and ascending said pallet
from the conveyer system and for descending and returning it
to its original position, disposed for each of said carry-in
~: Conveyers at a position adjacent to the mill roll stand;
wherein the free end portions of the respective swing arms in . .
7 ~ ~
- 6 -
the swing arm mechanisms are bent toward the carry-out
conveyer with a predetermined angle.
In preferred embodiments of this aspect, there are
provided: -
~:
The above web feeding device for a corrugator, wherein
said carry-out conveyer comprises a flat car having a table
for loading a web roll thereon and is capable of running
freely, wherein gentle slopes are formed on the top surface
of said table each declining toward the center line of the
table directing to the line of transportation to form a
V-shaped cross-section.
The above web feeding device for a corrugator, wherein a
guide member whose top surface is declined toward the carry-
out conveyer is disposed at an inner area of the two swing
arm mechanisms disposed on both sides of said carry-out
conveyer.
:.' '
In a further aspect, the invention provides a web
- feeding device for a corrugator comprising: a mill roll
~ stand comprising two swing arm mechanisms, each having a pair ;~
¦- of swing arms supported on a pivotal shaft which can be
turned with a predetermined angle to the positive and -
1~ negative directions relative to the perpendicular line
! extending upwardly from said shaft, disposed in euch a way
~hat the pivotal shafts thereof may be parallel to each
~ other: ~ web roll carry-in conveyersdisposed between said two
1~ swing arm mechanisms and comprising a reciprocatable conveyer
driving system extending parallel to said pivotal shafts and
a pallet for loading a web roll thereon to be removably
mounted to said conveyer driving system; web roll carry-out
conveyers disposed at outer areas relative to said two swing
arm mechanisms to extend parallel to said pivotal shaft; and
~ S', ~ "'~ " "~ >~
132~7~ -
a lifter for separating and ascending said pallet from the
conveyer driving system and for descending and returning it
to its original position, disposed for each of said carry-in
conveyers at a position adjacent to the mill roll stand;
wherein the free end portions of the respective swing arms in
the swing arm mechanisms are bent away from the carry-in
conveyer with a predetermined angle.
The above noted preferred embodiments also relate to
this further aspect of the invention.
In a still further aspect, the invention provides a web
feeding device for a corrugator for use in a factory site
comprising: a mill roll stand consisting of two swing arm
mechanisms, each having a pair of swing arms supported on a
pivotal shaft which can be turned at a predetermined angle to
positive and negative directions relative to a perpendicular
line extending upwardly from said pivotal shaft, said pivotal
shafts being parallel to each other; a web roll carrying-out
conveyor provided between said two swing arm mechanisms and
parallel to said pivotal shafts; and two web roll carrying-in
conveyers provided in outer areas relative to said two swing
arm mechanisms, respectively, and parallel to said pivotal
shafts; wherein each of said web roll carrying-out and
carrying-in conveyors comprises: a conveyor driving system
compriæing a pair of parallel endless chains reciprocating in ~
a pit which is provided in said factory site, horizontal ~ :
upper portions of said horizontal endless chains being set
slightly below an opening of said pit; a pallet having a roll :~
loading surface and a bottom surface wherein said roll
loading surf~ce co~prises two slant planes mutually facing
each other so that said web roll is stably loaded thereon and
said bottom surface is provided with two parallel
perpendicular protruding portions, said pallet being mounted
on said upper portions of said endless chains so as to be
~32~7~
separated therefrom with said protruding portions facing down
from said opening of said pit; and a lifter provided in said
pit which is installed adjacent to said mill roll stand, said
lifter being arranged and configured such that said lifter
normally positions at a height level not preventing movements
of said pallet, lifts said pallet upon a predetermined
command to a predetermined height level by separating said
pallet from said upper portions of said endless chains and
then upon a next command lowers said pallet so that said
pallet is mounted back on said upper portion of said endless :~
chains.
The invention also provides a web feeding device for a
corrugator comprising: a mill roll stand consisting of two
swing arm mechanisms, each having a pair of swing arms ~ ~.
supported on a pivotal shaft which can be turned with a ~ :
predetermined angle to positive and negative directions
relative to a perpendicular line extending upwardly from said
pivotal shaft, disposed in such a way that the pivotal shafts
thereof may be parallel to each other; a conveyor for ~-
transporting the web rolls disposed between said two swing
arm mechanisms to extend parallel to said pivotal shafts, ;
said web roll transporting conveyor disposed intermediate ~ -
between said two swing arm mechanisms comprising a conveyor
; for carrying in web rolls; and two web roll transporting
conveyers disposed at outer areas relative to the swing arm : : `
mechanisms, respectively, to be extended parallel to said
pivotal shafts, ~aid two web roll transporting conveyors :-~
disposed at outer areas relative to the two swing arm
mechanisms, respectively, comprising conveyors for carrying .
out web rolls. : -
Further, the invention provides a web feeding device for .;~
a corrugator for use in a factory site comprising: a mill ~.
roll stand consisting of two swing arm mechanisms, each
132~79~
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having a pair of swing arms supported on a pivotal shaft
which can be turned at a predetermined angle to positive and
negative directions relative to a perpendicular line
extending upwardly from said pivotal shaft, said pivotal
shafts being parallel to each other; a web roll carrying-out
conveyor provided between said two swing arm mechanisms and
parallel to said pivotal shafts; and two web roll carrying-in
conveyer~ provided in outer areas relative to said two swing
arm mechanisms, respectively, and orthogonal to said pivotal
~hafts; wherein each of said web roll carrying-out and
carrying-in conveyors comprises: a conveyor driving system :~
which is a pair of parallel endless chains reciprocating in a
pit which is provided in a factory site, horizontal upper
portions of said horizontal endless chains being set slightly : :
below an opening of said pit; a pallet having a roll loading ~ -
surface and a bottom surface wherein said roll loading :-
surface comprises two slant planes mutually facing each other ~:
20 80 that said web roll is stably loaded thereon and said .
bottom surface is provided with two parallel perpendicular
protruding portions, said pallet being mounted on said upper
portions of said endless chains 60 as to be separated : -
therefrom with said protruding portions facing down from said
opening of said pit; and a lifter provided in said pit which
i8 installed adjacent to said mill roll stand, said lifter
being arranged and configured such that said lifter normally
positions at a height level not preventing movements of said
pallet, lifts said pallet upon a predetermined command to a
predetermined height level by separating said pallet from
said upper portions of said endless chains and then upon a
next command lowers said pallet so that said pallet mounted :
back on said upper portion of said endless chains. :-
- '
St~ll further, the invention provides a web feeding
device for a corrugator comprising: a mill roll stand
consisting of two swing arm mechanisms, each having a pair of -
13247~ -
- sb -
swing arms supported on a pivotal shaft which can be turned
with a predetermined angle to positive and negative
directions relative to the perpendicular line extending
upwardly from said pivotal shaft, disposed in such a way that
the pivotal shafts thereof may be parallel to each other; a
web roll transporting conveyor disposed between said two -
swing arm mechanisms to extend in parallel to said pivotal
shafts, said web roll transporting mechanism disposed
intermediate between the two swing arm mechanisms comprising
a conveyor for carrying in web rolls; and web roll
transporting conveyers disposed at outer areas relative to -~
the two swing arm mechanisms to extend orthogonal with said
pivotal shafts, said two web roll transporting conveyors
disposed at outer areas relative to said two swing arm
mechanisms comprising conveyors for carrying out web rolls.
With the above devices, the loading web roll to the arms
or releasing of the web roll therefrom only requires a basic -
operation of turning the swing arms to a predetermined `
direction. Accordingly, compared with any conventional mill
roll stand in which swing arms must be reciprocated to the
positive and negative directions to achieve the same purpose,
time cycle required for achieving the above operation may -
notably be reduced in the device of this invention.
Further reduction in the time cycle can be realized by
providing a lifter for the web roll transporting conveyer,
and by ascending the lifter loading a web roll thereon
simultaneously when said swing arms are turned such that the ~
web roll and the swing arm may approach to each other when - -
the web roll is loaded to the swing arms. Moreover, the
present device, because of its simple structure, enjoys the -
advantages of easy maintenance and inspection, and reduced
production cost.
.''-"
,
~ `, ?~ s ~
13~7~
- 8c -
Next, the web feeding device for a corrugator according
to this invention will be described below by way of preferred
embodiments and referring to the attached drawings.
'~
~ 20
-- 132~7 ~
g
The mill roll stand according to the embodiment a~ shown
schematically in Figs. 1 and 2 is of the swing arm system.
It should be noted, however, that the swing arm mechanism
constituting the mill roll stand 10 has a pair of swing
arms on the right and left sides relative to the perpendi-
cular line extending upwardly from a shaft on which they
are supported, and which can be swung with a predetermined
angle. For example, a pivotal shaft 11 is pivotally
~upported at each end by a pair of bearings 21 disposed on
a base 20 and spaced with a predetermined distance from
and to oppose each other. The above pair of swing arms 13
arc connected at the hinge portion to this pivotal shaft
11 by means of splines. To describe in detail, keys 22
are provided on the pivotal shaft 11 to protrude therefrom
15 parallel to the axis of the pivotal shaft 11, and the -~-
hinge portion of the above swing arms 13 are locked by the
keys 22, respectively, so that the swing arms 13 may not
turn relative to said pivotal shaft 11 and that they may
be moved closer or farther along the axis of the pivotal
20 shaft 11. A pair of hydraulic cylinders 23 are also fixed -
to the pivotal shaft 11 parallel to said pivotal shaft 11,
respectively, and the tip end of a piston rod 24 in each -~
cylinder 23 i8 fixed to the hinge portion of the swing arm
13. Therefore, upon application of pressure to both of
the cylinders 23 synchronously, the above pair of swing
arms 13 are desiqned to be moved closer or farther to each
; other symmetrically along the pivotal shaft 11.
Another hydraulic cylinder 25 is disposed at the bearing -
21 supporting one end of the above pivotal shaft 11, and a
piston rod 26 in this cylinder 25 is pivoted to a lever 27
fixed to ~aid pivotal shaft 11. Upon application of
pressure to the above hydraulic cylinder 25, the pivotal
shaft 11 i5 designed to be turned with a predetermined
angle together with the above pair of swing arms 13 8Up-
ported thereon. The turning angle of the pivotal shaft 11
132~79~
- 10 - ~
and the swing arms 13 is set to be 45 each in the posi-
tive and negative directions relative to the perpendicular
line P, i.e. 90 in total, as shown in Fig. 2. Accord-
ingly, the swing arms 13, as will be described later in
more detail, can select either one of the carry-in
conveyer and carry-out conveyer which are extending
parallel to each other on both sides of the swing arm
mechanism, respectively, to stop above either one of said
conveyers in a tilted posture.
At the tip of each swing arm 13, a center block lb is
fixed to protrude toward the tip end of the other swing
arm 13 with which the former æwing arm 13 is forming a
pair, 80 that a paper tube 15 of a web roll 14 may be
chucked at both ends by these center blocks 16. If the
entire mechanism constituted around the pivotal shaft 11
i8 referred to as a swing arm mechanism 28, exactly the
same mechanism is disposed relative to the other pivotal
shaft 12 which is parallel to said pivotal shaft 11 a8 a
swing arm mechanism shown with the numeral 29.
. ,
The mill roll stand 10 shown in Fig. 1 i8 adapted to be
disposed below a known splicer 30 which perform~ splicing
of webs, as shown in Fig. 2. On the floor of the factory
site where such splicer 30 and the above mill roll stand
10 as well are installed, three pits each having a pre-
determined depth are defined parallel to the pivotal
shafts 11 and 12 each supporting thereon swing arms 13 ~in
the orthogonal direction relative to the line of feeding
webs). Namely, at a position intermediate between the two
pivotal shafts 11 and 12 each constituting the swing arm
mechanism 28 or 29 in the above mill roll stand 10, a --
first pit 31 is defined for disposing a web roll carry-out
conveyer EX to be housed therein.
A second pit 32 and a third pit 33 are each formed
' ' .
132~L7~
-- 11 --
parallel to the first pit 31 at an outer area relative to
each of the pivotal shafts 11 and 12 in said two swing arm
mechanisms 28 and 29, respectively. A web roll carry-in
conveyer INl is disposed to be housed in the second pit
32; whereas a web roll carry-in conveyer IN2, in the third
pit 33. Namely, in a web feeding device according to a
first aspect of this invention, the web roll carry-out
conveyer EX is disposed intermediate between the two
pivotal shafts 11 and 12; whereas on the left side rela-
tive to the pivotal shaft 11, the web roll carry-in
conveyer INl i8 disposed, and on the right side relative
to the pivotal shaft 12, a web roll carry-in conveyer IN2
is disposed.
While the above-mentioned conveyers (EX for carrying out
web rolls 14), and INl and IN2 (for carrying in web rolls
14) are extended on the floor of the factory site parallel
to each other from the above-mentioned firæt to third
pits, respectively, as starting points of one side, layout
patterns for these conveyers may come out in various
conceivable types as shown in Figs. 3, 6 and 7. Among
`~ these layout patterns, the most typical one is as shown in
Fig. 3, which is supposed to be most suitable for the
present spatial condition in many factories of users
having corrugator lines installed therein.
~- To describe in detail, when a zone where an operation
panel i8 disposed is defined as an "operation zonen, and a
; zone which is to be located at a portion opposite to the
operation zone and where driving power is transmitted
through a line shaft is defined as a "driving zone" in the -~
line of corrugator comprising serially connected compo-
nents to be extended into an elongated line, an arrange-
ment i8 frequently employed in which the driving section
of the corrugator is disposed adjacent to the wall of the
factory in order to utilize the limited space effectively.
.
-- 132~799
- 12
Thus, in a factory site where it is difficult to secure a
large space for the driving zone, the web roll carry-out
conveyer EX is extended toward the "operation zone" from
the first pit 31 likewise, the conveyers IN1 and IN2 may
be adapted to be extended correspondingly from the second
pit 32 and the third pit 33 toward the "operation zone~ as -
shown in Fig. 3.
In a web feeding device according to the embodiment shown
in Figs. 1 and 2, a web roll carry-out conveyer EX is
adapted to be extended between the two swing arm mechanism
28 and 29 constituting the mill roll stand 10; and at an
outer area relative to each of the respective swing arm
mechanisms 28 and 29, web roll carry-in conveyers INl and
IN2 are extended parallel to each other, respectively.
Each pair of swing arms 13 chuck a web roll 14 carried in
loaded on the conveyer INl ~IN2) and then are swung upward
to a position above the carry-out conveyer EX, and at this
position the web is fed out. When the web roll 14 i8 then
replaced with a new web roll 14 of the next order, the
used web roll 14 is released from the swing aems at a
position above the carry-out conveyer EX. -~ -
In thi~ process, the angle of turning the swing arms 13 is
set in such a way that they may be turned 45 each to the
positive and negative directions relative to the perpen-
dicular line P as described aboYe and they cannot be ~-
turned at any angle greater than the above degree. It is
of course possible technically to use a turning angle
greater than the above degree. However, if such larger
angle is used, the width of the mill roll stand 10 may
naturally be increased proportionally. ~hus, even if the
swing arms 13 are turned with an angle of 45 relative to
- the perpendicular line P and stopped there in a tilted
posture, the center blocks 16 may not be aligned with the
center of the paper tube 15 of the web roll 14 loaded on
,,:
:
. .
-` 13~7~
- 13 -
the respective carry-in conveyers INl or IN2, leading to
failure in chucking.
Therefore, in the present embodiment, the centering of the
paper tube 15 of the web roll 14 with the opposing center
blocks 16 of the swing arms 13 is facilitated by disposing
a lifter 34 (to be described later) in each pit in which
the conveyer EX, IN1 or IN2 is provided and by ascending
the web roll 14 to a predetermined level by said lifter.
Further in such an embodiment, it i8 necessary to inter-
pose a pallet which is removable from the conveyer in
order to lift up the web roll 14 from each conveyer EX,
INl or IN2. Therefore, a slat conveyer conventionally
used may not be usable at least as the conveyers INl and
IN2 for carrying in web rolls 14.
~ , .. . .
; Incidentally, the web feeding device shown in Pig. 1 has a
structure in which the lifter 34 is provided for both the
conveyer EX for carrying out web rolls 14, and the con-
veyers INl and IN2 for carrying in web rolls 14. The
constitution of the conveyers for carrying in and carrying
out the web rolls 14 utilizing the lifter 34 and the
pallet 35 will then be described referring to Figs. 8 to
.'~ 11. .
The conveyer EX for carrying out the web rolls 14 and the
conveyers INl and IN2 for carrying in web rolls 14 used in
thi~ embodiment is a kind of so-called free flow conveyer.
For example, a pair of endless roller chains 37 are
provided in each of the pits 31, 32 and 33 to be extended
around a plurality of sprockets 36, to be parallel to each
other 80 that they may be circulated continuously to a
predetermined direction. As described above the pit 31,
32 and 33 extending from the operation zone of the cor-
rugator are covered 80 that they may not hinder operators'
passage. In this cover, two grooves are formed for
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132~799
- 14 -
receiving the above-mentioned pair of endless roller
chains 37.
The pallet 35 has two slant planes 35a to form a V-shaped
cross-section which enables loading of a web roll 14
stably at the center portion thereof as shown in Fig8. 8
and 9, and protruding portions 35b, which can be placed on
said two roller chains 37 are formed protruding downward
across the bottom surface of said pallet. Incidentally,
it is also possible to dispose two parallel pairs of
roller chains 37 each pair having a different space
therebetween. In such constitution, protruding portions
35b to be placed on the outer pair of roller chains 37 and
those to be placed on the inner pair of roller chains 37
may preferably be formed independent of one another. As
~hown in Fig. 8, the inner pair of roller chains 37 and
the outer pair of roller chains 37 can be circulated
selectively by driving the corresponding sprocket disposed
relative to said roller chains 37, independently.
As described above, each pallet 35 is designed to be
removably mounted relative to the roller chains 37 con-
stituting the driving system for each conveyer EX, INl and
IN2. In each of the pits 31, 32 and 33 defined parallel -
to each other and adjacent to the mill roll stand 10, a
pantographic lifter 34 iB disposed correspondingly to be
housed therein, respectively. This lifter 34 is driven by
; a predetermind driving source not shown such as a hydrau-
lic cylinder for its ascending or descending movement.
When the lifter 34, for example, is ascended, it i8 first
brought into contàct upwardly with the bottom surface of -
the pallet 35 placed on the roller chains 37 and posi-
tioned adjacent to the mill roll ~tand 10, and then said
palIet 35 i8 separated from the conveyer driving system to
be ascended to a predetermined level. When the above
driving source is driven reversely, the lifter 34 descends
: '
--- 132~79.~
- 15 -
to place the pallet 35 stably on the roller chain 37
constituting the conveyer driving system, and it further
descends to a predetermined position and stops there.
5 Fig. 10 shows an exemplary layout pattern in a factory
where the above-mentioned free flow conveyer mode web roll ^ ~-
conveying system is used, wherein an outer pair of roller
chains 37 and an inner pair of roller chains 37 are di6-
po~ed parallel to each other as described referring to
Fig. 8. A turn table 38 is provided at each position at
which the direction of the roller chains 37 are turned by
90. To describe in detail, in Fig. 10 the web roll 14 is
loaded on the pallet 35 in the stockyard SY for storing
web rolls 14, and a group of these pallets 35 can be
forwarded by driving either one of the outer pair of
roller chains 37 and inner pair of roller chains 37
according to a command as necessary. When the direction
of the pallet 35 i8 to be turned, it i8 turned by the
turntable 38 by 90 and then forwarded to the succeeding
conveyer.
During the time when the web roll 14 is being turned
together with the pallet 35 on the turntable 38, the -~
pallet 35 present in the upstream o~ the line is in pause
as shown in Fig. 10. Even when a plurality of pallets 35
are present on a common conveyer line, one pallet 35 can
` be forwarded, while the other pallet 35 can be kept in
pause by dr1ving the roller chains 37 qelectively.
Figs. ll(a) and (b) each show a vertical cross-~ectional
view of the portion for relaying the turntable 38 men-
tioned above with the eespective conveyer EX, INl and IN2.
Namely, sprockets 39 are disposed along the internal side
of the respective roller chains 37. The sprockets 39 are
connected to a sprocket 41 fixed to the end of a horizon-
tal rotary shaft 40 by means of a chain 42 extended around ~ -
~ ~2~79~ :
- 16 -
them. A sprocket 43 is fixed at the center of the rotary
shaft 40, and connected to a sprocket 45 provided in a
separate driving mechanism 44 by means of a chain 46
extended around them. The turntable 38 itself having
these mechanisms is designed to be turned horizontally to
a direction as desired by a motor 47 under engagement of a
train of gears 48.
Other roller chains 37 are disposed independent of the
above roller chains 37 at the end portion of the line in
order to forward the pallet 35 to the turntable 38.
Likewise, to these latter roller chains 37 disposed at the
line end portion, a sprocket 49 is provided, 80 that it
may be connected to a sprocket 51 provided in a driving
mechanism 50 through a chain 52 extended around them.
Accordingly, the above roller chains 37 is adapted to be
driven independently upon actuation of the driving
mechanism 50 80 that the pallet 35 may be forwarded to the
turntable 38. Incidentally, when the pallet 35 is to be
forwarded from the turntable 38 to the conveyer line, the
above driving mechanism 50 is driven reversely. -~
~, .
Next, function of the web feeding device according to the ;~
so-constituted embodiment will be described re~erring to
the illustration of operation shown in Figs. 4~a) to ~d)
and the flow chart shown in ~ig. 5. Preparation steps for -
~` loading a web roll 14 to each of the swing arm mechanisms
28 and 29 in the mill roll stand 10 is first described.
.
30 It should be noted that in the following description on ~-
the function, in order to identify to which of the swing
arm mechanisms 28 and 29 ~left and right) the swing arms ~-
are supported by the shaft in such a way that they may be ~ ;~
turned together with said shaft, the left side pair of --
~wing arms are referred to as "left arms" to be distin-
guished from the right side pair of swing arms as ~right
''-~; . '
. . . . ...
- 1324799 :
- 17 -
arms~. Further, referring also to the pallet 35 and
lifter 34,
(1) members located in the left carry-in conveyer INl are
defined as "L pallet" and "L liftern,
~2) the members located in the intermediate carry-out
conveyer EX are defined as "M pallet" and "M liftern,
and
(3) the member~ located in the right side carry-in
conveyer IN2 are defined as "R pallet" and "R
lifter",
respectively.
When the splicer 30 is in stand-by posture, a head 30a and
a head 30b in said splicer 30 are open widely to each
other in the oppo6ing directions. The left arms 13
provided in the left swing arm mechanism 28 are stopped
above the carry-out conveyer EX in a rightwardly tilted
posture as shown by the two-dotted chain line in Fig.
4(a); whereas the right arms 13 provided in the right
swing arm mechanism 29 are likewise stopped in a right-
wardly tilted posture.
~; It is to be understood that while the unloaded M pallet
35, under the above state, is positioned immediately above ~- -
the lifte~ 34 in the carry-out conveyer EX, neither the L
pallet 35 nor the R pallet 35 has reached any of the
positions where the lifter is disposed in the carry-in
conveyers INl and IN2. The right (left) swing arms 13 are
spaced farther from each other along the axis of the shaft
so that the center blocks 16 may assume the open posture.
Next, the L pallet 35 loading a web roll 14A thereon
travels along the carry-in conveyer INl until it reaches
the left side of the swing arm mechanism 28 to stop immedi-
ately above the L lifter 34 and wait for chucking by the
; left swing arms 13. In this state, the hydraulic cylinder -
,' ~
13247~
- 18 -
25 provided for the swing arm mechanism 28 is actuated to
turn the left arms 13 counterclockwise until they assume
leftwardly tilted posture above the carry-in conveyer INl,
and where the left arms 13 are stopped. The L lifter 34
is also ascended to bring the paper tube 15 of the web
roll 14A loaded on the L pallet 35 to the tips of the
center blocks 16. Incidentally, when an unused or little
used web roll 14A, whereby having a sufficiently large
diameter, is to be chucked, the level of the lifter 34 to
be ascended may be smaller correspondingly. Subsequently,
the above hydraulic cylinder~ 23 are actuated synchro-
nously to move the left arms 13 closer to each other to -
effect chucking of the web roll 14A by the center blocks
16 provided thereon.
During the time when the left arms 13 are in pause above
the carry-in conveyer INl as described above, the
hydraulic cylinder 25 provided for the right swing arm
mechanism 29 is actuated, whereby the right arms 13 which
are in pause above the carry-in conveyer IN2 are turned
counterclockwise and pau~e above the carry-out conveyer EX
in a leftwardly tilted posture. Next, the R pallet 35 -~
loading a web roll 14B travels along the carry-in conveyer
IN2 until it reaches the right side of the swing arm
mechanism 29 and stops immediately above the R lifter 34
to wait for chucking by the swing arms. In this state,
the hydraulic cylinder 25 provided for the swing arm
mechanism 29 i8 actuated to turn the right arms 13 clock-
wise until they assume a letwardly tilted posture above
the carry-in conveyer IN2, and where the left arms 13 are
stopped.
'
In the above process, provided that the web roll 14B has a
- reduced diameter after consumption of the web to make
chucking of-the paper tube 15 infeasible only by the
turning of the right arms 13, the R lifter 34 is then
:~' .
. .
~: 132~7~
-- 19 --
actuated to ascend the R pallet 35 together with the web
roll 14B to a predetermined level to effect centering of
the paper tube 15 of the web roll 14B and the center
blocks 16 of the right arms 13~ Subsequently, the hydrau-
lic cylinders 23 are actuated synchronously to move theright arms 13 closer to each other and effect chucking of
the web roll 14B by the center blocks 16 thereof (see Fig.
4(a)).
Further the tail end of the web roll 14A is set to the
head 30a of the splicer 30; whereas the tail end of the
web roll 14B iB set to the head 30b.
. . .
Upon completion of chucking of the web roll 14A and the
web roll 14B, the left arms 13 holding the web roll 14A
therebetween are turned counterclockwise by actuation of
- the cylinder 25 reversely, and by allowing said left arms
; 13 to stop in a rightwardly tilted posture, the web roll
14A can be brought to a position above the carry-out
conveyer EX (see Fig. 4(b)).
The L pallet 35 in the left carry-in conveyer INl, having ;
thu~ unloaded, i8 retracted from the position where the L -
lifter i8 disposed. Further, the heads 30a and 30b of the
25 splicer 30 are moved closer to each other to achieve ~-
splicing of the web delivered from the web roll 14A and
; feed~lng to a web consuming mechanism of the corrugator
such as a single facer (not shown), as shown in Fig. 4(b).
An L;pallet 35 loading a web roll 14C to be used after the
next order travel~ along the carry-in conveyer INl to stop
immédiately above~the L lifter 34 positioned on the left
side of the~s*ing arm mechanism 28 and wait for chucking
by~the swing arms in due order.
Next, desdription will be made on removal of the web roll
14A in use being loaded onto the left arms 13 for re-
. ~ . .
,, . ' :
; ~ .
' ~ i , ,,", "",,~ , .,;" ~; ,-,,j", , ,;, ,~,." ~,;,,; ,
132~79~
- 20 -
turning it to the stockyard SY, and on replacement of a
web roll 14A under loading with a web roll 14B of dif-
ferent standard as mentioned above according to the order
change during operation of the corrugator.
First, the web being delivered from the web roll 14A i8
cut in the splicer 30 to be released from the head 30a,
and the web from the web roll 14B loaded onto the right
arms 13 i~ spliced by the splicer 30, whereby the web of
the web roll 14B is fed to the web consuming mechanism of
the corrugator.
.
Immediately after this splicing, the M lifter 34 disposed
in the carry-out conveyer EX is ascended to support the
former web roll 14A having a reduced diameter after con-
sumption of the web on the M pallet 35 thereof. The left
arms 13 are then moved farther from each other to release
chucking by the center blocks 16 against the former web
roll 14A. In this state, said M lifter 34 is descended to
its lower position again, and the former web roll 14A is
carried out together with the M pallet 35 along the carry-
out conveyer EX.
,~ . . .
Subsequently, the left arms 13 which bave released the
former web roll 14A are turned counterclockwise and stop
in the waiting posture; whereas the web roll 14C having
reached the left carry-in conveyer INl is a~cended by
actuation of the L lifter 34 di~posed below its waiting
position to the chucking po6ition. After alignment of the
paper tube jlS of the web roll 14C with the center blocks
16, said left arms 13 are moved closer to each other to
effect chucking aginst the web roll 14C. After completion
~ of the chucking against the web roll 14C, the L lifter 34
- is descended again and also the L pallet 35 is retracted
from thi~ carry-in conveyer INl to be prepared for
carrying in the next web roll. -~
~'
,. .
'".
~.
i3~7~
- 21
~he tail end of the web roll 14C to be used in the next
order is set to the head 30a of the splicer 30 and waits
for 6plicing in the next order. Incidentally, the carry-
out conveyer EX is now empty after carrying out of theformer web roll 14A. Thus, as shown in Fig. 4(d), the
right arms 13 loading a new web roll 14B under delivery
are turned counterclockwise to shift them to the side of
carry-out conveyer EX from the side of carry-in conveyer
IN2. Since the carry-in conveyer IN2 will be empty after
the above operation, another web roll 14D to be used after
the next order is then loaded onto the R pallet 35 and
transported along the carry-in conveyer IN2. The
operation procedures are then repeated alternatively with
respect to the carry-in conveyers INl and IN2, in the
order as shown in Fig. 4(b) --~ Fig. 4(c) 3 Fig. 4(d)
~ Fig. 4(b).
According to the web feeding device of this embodiment,
the total time required for removing the web roll in use
from the swing arm and chucking a web roll to be used in
the next order can considerably be reduced, since the
above procedure can be achieved only by turning the swing
arms by 90 from the position above the central carry-out
conveyer EX to the position above the carry-in conveyer
INl or IN2, as opposed to the conventional mill roll stand
shown in Fig. 22 which require complicated procedures,
uch as to allow the swing arms having released a web roll
onto a conveyer to retract to the original position and
- 30 then to turn again to be loaded with a new web roll on the
same conveyer.
Next, a variation of layout pattern in a factory utilizing
the web feeding device shown in Fig~ 1 is illustrated in
Fig. 6. Such layout pattern can be employed when suf-
ficient space can be secured not only for the operation
-
~~ , .
--" 132479~
- 22 -
zone but also the driving zone in a corrugator line. To
describe in detail, in the pattern shown in Fig. 6, while
the conveyers INl and IN2 for carrying in web rolls are
both positioned in the operation zone, the carry-out
conveyer EX is extended across the driving zone. Ac-
cordingly, the driving zone can be utilized as the area
for transporting used web rolls 14 so that such used web
rolls 14 may successively be transported to the stockyard
SY. In this context, stock conveyers SC may be disposed
on the side of the carry-out conveyer EX to be in align-
ment with the corresponding carry-in conveyers INl and
IN2. In such layout pattern, used web rolls 14 which are
to be used again subsequent to the next order can be
stocked temporarily in these stock conveyers SC to be
returned readily to the carry-in conveyers INl and IN2,
allowing prompt response to order changes, advantageou~ly.
Moreover, by turning the direction of web rolls by the
turntable 38, they can be forwarded to another web feeding
device instead of being forwarded to the stockyard SY.
Incidentally, web rolls 14 are fed successively to the
carry-in conveyers INl and IN2 in the operation zone by
operators using, for example, a fork lift in proper
timing. -
Fig. 7 shows another variation of layout pattern in the
factory based on the layout pattern shown in Fig. 6, which
- is an example where a stock conveyer SC i8 further pro-
vided in the operation zone. Namely, a carry-out conveyer
30 EX is extended in the driving zone of the corrugator; --
wherea~ in;the operation zone opposite to said driving
zone a stock conveyer SC comprising a conventionally known
slat conveyer for stocking web rolls is disposed in align-
ment with the above carry-out conveyer EX. In the down-
stream of the slat conveyer SC, a web roll supplying
conveyer i8 connected thereto.
~ ;'' ,:-
~32~i7~
- 23 -
In the above slat conveyer SC, various types of web rolls
14 are adapted to be stocked thereon for coping with
various orders. A used web roll 14, for example, is
generally carried out directly to the stockyard SY by
means of the above carry-out conveyer EX. However, if the
web roll 14 is of a standard which is frequently used,
said web roll 14 is retracted to the slat conveyer SC to
be stocked thereon. When said web roll 14 is used intru-
sively, said web roll 14 is forwarded from the slatconveyer SC to the web supplying conveyer. If there is no
necessity to stock such web rolls, the slat conveyer SC
can be used as an auxiliary carry-in conveyer for carrying
in new web roll~ for the carry-in conveyers INl and IN2.
Fig. 12 shows an expansive example of layout pattern using
the web feeding device according to this invention, i.e.
an example in which two carry-in conveyers INl and IN2 for
carrying in web rolls 14, and two carry-out conveyers
EXland EX2 are used, respectively. To describe in detail,
the two swing arm mechanisms 28 and 29 in the mill roll -
- stand 10 are designed to be disposed adjacent to each
other with a larger distance than in the conventional mill
roll stand, and two carry-out conveyers EXl and EX2 are
disposed between said two 6wing arm mechanisms 28 and 29.
At an outer area relative to each of the two pairs of
swing arms 13, carry-in conveyers INl and IN2 are dis-
posed, respectively. In a layout pattern where two carry-
in conveyers INl and IN2 and one carry-out conveyer EX are
used similarly to the web feeding device shown in Fig. 1,
in order to carry in a fifth web roll 14E, it must be in a
waiting posture, during the time when a first web roll 14A
is carried out; the second web roll 14~ and the third web
roll 14C are then spliced; the second web roll 14B is
carried out; and the third web roll 14 is carried onto the
~ .
' , .
i32~7:~
- 24 -
carry-out line. However, according to the layout pattern
shown in Fiy. 12, the fifth web roll 14E can advanta-
geously be carried in requiring substantially no waiting
time, since the third web roll 14C can be carried onto the
carry-out line, after the first web roll 14A is carried
out, irrespective of the motions of the second web roll
14B and the fourth web roll 14D.
Fig. 13 shows a variation of the web feeding device shown
in Fig. 1. In the web feeding device shown in Fig. 1, the
lifter 34 i8 used in any of the carry-in conveyers INl and
IN2 and the carry-out conveyer EX. However, the greater
the number of the lifter 34 is, the higher may be the
production cost. Further, the use of the lifters 34
naturally require use of free flow mode conveyers wherein
the pallet~ 35 can be separated from the roller chains 37.
For such reasons, in the web feeding devica shown in Fig.
13, the lifter 34 is used only in the carry-in conveyers
INl and IN2, re~pectively, and the constitution of these
conveyers INl and IN2 is designed to be of the above-
mentioned free flow mechanism, whereas a conventional slat
conveyer i8 used for the conveyer EX for carrying out the -~
web rolls 14.
25 It should be noted, however, that if ~wing arms 13 having ~-
a shape as 6hown in Fig. 1 are used in the above constitu-
~- tion a gap between the level of the web roll 14 and that - -
of the slat conveyer may be big to generate a larger shock
disadvantageously when the chucking against the used web
30 roll 14 is released from the swing arm3 13 onto the slat
conveyer. Therefore, free end portions 13a of the respec- ~ -
tive swing arms 13 are bent toward the carry-out conveyer
BX with a predetermined off-set angle, such that the gap
between the level of the flat car 53 on the carry-out -~--
conveyer 53 and that of said web roll 14 may be minimal to
prevent generation of greater shock.
: ' , '.: -. '
~,
132~7~ ~
- 25 -
The mill roll stand 10 shown in Fig. 13 is disposed below
a known splicer 30 which perform~ splicing of webs as
shown in Fig. 14. On the floor of the factory site where
such splicer 30 and the above mill roll stand 10 as well
are installed, three pits each having a predetermined
depth are defined parallel to the pivotal shafts 11 and 12
each supporting thereon swing arms 13 (in the orthogonal
direction relative to the line of feeding webs). Namely,
at a position intermediate between the two pivotal shafts
11 and 12 each constituting the swing arm mechanism 28 or
29 in the above mill roll stand 10, a first pit 31 i8
defined for disposing a web roll carry-out conveyer EX to
be housed therein.
This carry-out conveyer EX is a slat conveyer, and a flat
car 53 is provided in the pit 31 such that the flat car 53
may run freely therealong. The flat car 53 has a table 54
for loading web rolls thereon, having two islant planes 54a
on the top surface to form a V-shaped cross-section, and
~- 20 only this table 54 appears above the pit. Incidentally,
the slant planes 54a formed on the table 54 serve to guide --
a u~ed web roll 14 to the center of the flat car 53 when ; -
said roll 14 is released from the swing arm mechanism 28
~~~ (29), as will be described later.
A second pit 32 and a third pit 33 are formed parallel to ~ -
the first pit 31 at outer areas relative to the pivotal
shafts 11 and 12 in said two swing arm mechanisms 28 and
29, respec~tively. A web roll carry-in conveyer INl i8
disposed to be housed in the second pit 32t whereas a web
roll carry-in conveyer IN2, in the third pit 33.
The carry-in conveyers INl and IN2 for carrying in web
roll~ 14 to be used herein are a kind of free flow con-
veyer of the same constitution as described referring to
; ' ' ' .
132~79~
- 26 ~
Fig. 8. As shown in Fig. 14, the pallet 35 is removably
mounted on a pair of endless roller chains 37 so that the
former can be carried along the latter. The above pallet
35; the constitution where the pallet 35 is removably
mounted on the roller chains 37 each constituting the
conveyer driving system of the conveyer INl and IN2; and
the constitution where ascending and descending of the
pallet 35 i~ performed by the pantographic liftee 34
disposed relative to each pit 32 or 34 can likewise be
explained by the description made referring to Figs. 8 and
9. A~ for the functions, when the lifter 34 is ascended,
the lifter is first brought into contact upwardly with the
bottom surface of the pallet 35 mounted on the roller
chains 37 and positioned adjacent to the mill roll stand
10, and ~hen said pallet 35 is separated from the conveyer
driving system to be ascended to a predetermined level
(see Fig. 15(a)). When the driving source mentioned
before is driven reversely, the lifter 34 descends to
mount the pallet 35 again ~tably on the roller chains 37
which constitute the conveyer driving system and further
descends until it reaches a predetermined position to stop
there (see Fig. 15lb)).
Accordingly, when the swing arms 13 are turned to a posi-
tion above the carry-in conveyer INl ~IN2), a web roll 14
; loaded on the pallet 35 is ascended to a predetermined
level, whereby centering of the paper tube 15 of said web
roll 14 with the opposing center blocks 16 of the swing
arms 13 can be effected.
Each pair of swing arms 13 of the fiwing arm mechanisms 28
and 29 are awung upward to a position above the carry-out ; ;
conveyer EX after chucking the web roll 14 supplied onto
the carry~in conveyer INl (IN2). After completion of web -
feeding at this position, replacement with a new web roll
14 can be achieved by releasing the used former web roll
- . . .. . ~
- ' .
-
132479~
- 27 -
14 above said carry-out conveyer EX onto the flat car 53.
Next, Fig. 16 shows a variation of the device shown in
Fig. 13, wherein a pair of guide members 55 on each of
which a guide surface 55a declining toward the carry-out
conveyer EX is formed are extended with a predetermined
length parallel to the carry-out conveyer EX above the
level of the floor of the factory site each at a position
between the pit 31, in which the carry-out conveyer EX i8
di6posed, and the swing arm mechanism 28 or 29, respec-
tively. The table 54 of the above flat car 53 is designed
to have dimensions such that it can pass through the space
defined between said two guide members 55. Namely, in
releasing the used web roll 14 onto the flat car 53, said
web roll 14 is directed to the table 54 of the flat car 53
guided by the guide surfaces 55a formed on the guide -~
members 55.
~; Function of the web feeding device according to such
constitution will now be described referring to the
illustration of actions shown in Pig. 15~a) to (d) and the
flow chart shown in Fig. 17.
.; .-~, .
. , .
When the splicer 30 is in stand-by posture, a head 30a and
a head 30b in said splicer 30 are open widely to each
other in the opposing directions. The left arms 13 pro-
vided in the left swing arm mechanism 28 are in pause --
above-the carry-out conveyer EX in a rightwardly tilted
posture as shown~by the two-dotted chain line in Fig.
15~a)t whereas the right arms 13 provided in the right
swing arm mechan~ism 29 are likewise in pause in a right-
wardly tilted posture. It should be understood that in -
such~a state, while an unloaded flat car 53 is present on
- the carry-out conveyer EX, neither the L pallet 35 nor the
R pa}let 35 has not reached the carry-in conveyers IN
and IN2 at the position where the lifter is provided,
~ ~ .
132~799
- 28
respectively. Each pair of arrns 13 are spaced farther
from each other along the axis of the shaft so that the
center blocks 16 may assume the open posture.
Next, the L pallet 35 loading a web roll 14A thereon
travel~ along the carry-in conveyer INl until it reaches
the left side of the swing arm mechani~m 28 to ~top im-
mediately above the L lifter 34 and wait for chucking by
the left swing arms 13. In this state, the hydraulic
cylinder 25 provided for the swing arm mechanism 28 is
actuated to turn the left arm~ 13 counterclockwise until
they assume a leftwardly tilted posture above the carry-in
conveyer INl, and there the left arms 13 are stopped. The
L lifter 34 is also ascended to bring the paper tube 15 of
15 the web roll 14A loaded on the L pallet 35 to the tips of ~-
the center blocks 16. Incidentally, when a web roll 14A
has a sufficiently large diameter, for such reason as it
is unused or little used, is to be chucked, the level of
the lifter 34 to be ascended may be smaller correspon- ~ -
dingly. Subsequently, the above hydraulic cylinders 23
are actuated synchronously to move the left arms 13 closer
to each other to effect chucking of the web roll 14A by
the center blocks 16 provided thereon.
During the time when the left arms 13 are in pause above
the carry-in conveyer INl as described above, the --
hydraulic cylinder 25 provided for the right swing arm
mechanism 29 i8 actuated, whereby the right arms 13 which
are in pause above the carry-in conveyer IN2 are turned
countercloGkwise and pause above the carry-out conveyer EX
in a leftwardly tilted posture. Next, the R pallet 35
loading a web roll 14B travels along the carry-in conveyer ---
IN2 until it reaches the right side of the swing arm
mechanism 29 and ~tops immediately above the R lifter 34
to wait for chucking by the swing arms. In this state,
the hydraulic cylinder 25 provided for the swing arm
132~79~
- 29 -
mechanism 29 is actuated to turn the right arms 13 clock-
wise until they assume a rightwardly tilted posture above
the carry-in conveyer IN2, and where the right arms 13 are
~topped.
'
In the above process, provided that the web roll 14B has a
reduced diameter after consumption of the web to make
chucking of the paper tube 15 infeasible only by the
turning of the right arms 13, the R lifter 34 is then
actuated to ascend the R pallet 35 together with the web
roll 14B to a predetermined level to effect centering of
the paper tube 15 of the web roll 14B with the center
blocks 16 of the right ar,ms 13. Subsequently, the hydrau-
lic cylinders 23 are actuated synchronously to move the
right arms 13 closer to ea,ch other and effect chucking of
the web roll 14B by,the center blocks 16 thereof (see Fig.
15(a)). '
Further, the tail end of the web roll 14A is set to the - ''
20 head 30a of the splicer 30; whereas the tail end of the ,''~ '-
web roll 14B is set to the head 30b.
, . .
Upon completion of chucking against the web roll 14A and -
the web roll 14B, the left arms 13 holding t'he web roll
14A therebetween are turned clockwise by actuation of the
cylinder 25 reversely, and by allowing said left arms 13 -,
~ to stop in a rightwardly tilted posture, the web roll 14A
-~ can be brought to a position above the carry-out conveyer ~ ~"
EX (see`Fig. 15~b)).
,,;The~,L;,pallet 35-,;in~the left carry-in conveyer INl,~'having
been thus unloaded, is retracted fro~ the po~ition where - '
the L lifter is disposed. Further, the head 30a and 30b
of the splicer 30 ar- moved closer to each other to
achieve splicing,of the web deliv~ered from the web roll
14A and feeding to a web consuming mechanism of the
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corrugator such a~ a single facer (not shown), as shown in
~ig. 15(b). An L pallet 35 loading a web roll 14C to be
used after the next order travels along the carry-in
conveyer INl to stop immediately above the L lifter 34
po~itioned on the left side of the swing arm mechanism 28
and wait for chucking by the ~wing arms in due order.
Next, description will be made on removal of the web roll
14A in use being loaded onto the left arms 13 for re-
turning it to the stockyard SY, and on replacement of aweb roll 14A under loading with a web roll 14B of dif-
ferent standard as mentioned above according to the order
change during operation of the corrugator.
First, the web being delivered from the web roll 14A is
cut in the splicer 30 to be released from the head 30a,
and the web from the web roll 14B loaded onto the right ~
arms 13 is spliced by the ~plicer 30, whereby the web of ~ -
the web roll 14B is fed to the web consuming mechanism of
the corrugator.
Immediately after this splicing, the left arms 13 are
turned clockwise to bring the former web roll 14A having a
reduced diameter after consumption of the web to a posi-
25 tion above the flat car 53; wherein the distance between ~ -
.
said web roll 14A and the flat car 53 can be minimized,
since the free end~ 13a of the arms 13 are bent toward the
carry-out conveyer EX (see Fig. 15(c)). By moving the
left arms 13 farther from each otber, chucking by the ~ `
center blocks 16 against the former web roll 14A can be
released. The former web roll 14A is thus dropped onto
the flat car 53 and carried out as loaded on the flat car
53 alonq the carry-out conveyer EX. The former web roll
14A dropped onto the table 54 of the flat car 53 is guided
35 to the center of the flat car 53 to be loaded thereon -
stably, since slant planes 54a are formed on the table 54
,
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of said flat car 53.
Subsequently, the left arms 13 which have released the
former web roll 14A are turned counteeclockwise to stop in
the waiting posture; whereas the web roll 14C having
reached the left carry-in conveyer INl is ascended by
actuation of the L lifter 34 disposed below its waiting
position to the chucking position. After alignment of the
paper tube 15 of the web roll 14C with the center blocks
16, said left arms 13 are moved closer to each other to
effect chucking against the web roll 14C. After comple-
tion of the chucking against the web roll 14C, the L
lifter 34 is descended again and also the L pallet 35 i8
retracted from this carry-in conveyer INl to be prepared
for carrying in the next web roll.
~he tail end of the web roll 14C to be used in the next
order is set to the head 30a of the splicer 30 and waits
for splicing in the next order. Incidentally, the carry-
out conveyer EX i~ now empty after carrying out of theformer web roll 14A. Thu~, as ~hown in Fig. 15~d), the
right arms 13 loading a new web roll 14B under delivery
are turned counterclockwise to shift them to the ~lde of
carry-out conveyer EX from the side of carry-in conveyer
IN2. Since the carry-in conveyer IN2 will be empty after
the above operation, another web roll 14D to be used after
~; the next order is then loaded onto the R pallet 35 and
brought onto the carry-in conveyer IN2. The operation
procedures are then repeated alternatively with respect to
the carry-in conveyers INl and IN2, in the order as shown
in Pig. 15~b) --~ Fig. 15~c) ~ Fig. 15(d) --~ Fig.
15(b).
Next, a device of an arrangement in which the arrangement
- 35 of the device shown in Figs. 13 to 17 has been reversed
will be shown in Fig. 18. To describe in detail, a carry-
. - .
.
'f ' . ' ' '
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in conveyer IN is designed to be disposed intermediate
between the two swing arm mechanisms 28 and 29; whereas
carry-out conveyers EXl and EX2 are designed to be dis-
posed at outer areas relative to said swing arm mechanisms
28 and 29, respectively. Accordingly, one lifter 34 is
enough to be used only in the carry-in conveyer IN.
Further, the conveyers of free flow system on which the
pallet 35 is removably placed may be provided only for the
carry-in conveyer IN, contributing greatly to the re-
duction of the entire production cost.
Fig. 19 shows another embodiment of the web feeding device
according to this invention; wherein the web roll trans-
porting conveyers disposed at outer areas relative to the
two swing arm mechanisms 28 and 29, respectively, are
diæposed so that they may be orthogonal with the pivotal `
shafts 11 and 12 of the respective swing arm mechanisms 28
and 29. The constitution of the swing arm mechanisms 28
and 29 themselves should be understood to be the same as
~0 described referring to Figs. 1 and 2. Namely, a first pit
31 is defined intermediate between the two pivotal shafts
11 and 12 constituting the swing arm mechanisms 28 and 29, -
respectively, in the mill roll stand 10 parallel to said
pivotal shaft 11 and 12 ~in the orthogonal d~rection
relative to the line of feeding web rolls), and the web
roll carry-out conveyer EX is adapted to be disposed in
the first pit 31 to be~housed therein.
A second pit 32 and a third pit 33 are defined at outer
areas relative to said pivotal shafts 11 and 12 of the two
swing arm mechanisms 28 and 29, respectively, to extend
orthogonal with the pivotal shafts 11 and 12 ~parallel to
the line of feeding webs) of the two swing arm mechanisms
28 and 29 starting from the central position relative to
said pivotal shafts 11 and 12 and below the 6winging loci
of the swing arms 13. A web roll carry~in conveyer INl i8
.: '
'
.- ' .
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- 33 -
disposed to be housed in the second pit 32; whereas a web
roll carry-in conveyer IN2, in the third pit 33. To the
second pit 32 and the third pit 33, a fourth pit 56 and a
fifth pit 57 are connected, respectively, to extend
parallel to the above first pit 31. A web roll carry-in
conveyer IN3 is disposed to be housed in the fourth pit
56; whereas a web roll carry-in conveyer IN4, in the fifth
pit 57. At the junction of the second pit 32 (third pit
33) with the fourth pit 56 (fifth pit 57) a known turn-
table 38 is disposed, so that the direction of the webroll 14 transported by the carry-in conveyer IN3 (IN4) may
be turned by 90 to be forwarded to the swing arm mecha-
nism 28 (29).
Namely, in the web feeding device according to the embodi-
ment ~hown in Fig. 19, a web roll carry-out conveyer EX is
defined between the two swing arm mechanisms 2~ and 29
constituting the mill roll stand 10 to extend parallel to
the pivotal shafts 11 and 12, whereas at outer areas
relative to the respective swing arm mechanism~ 28 and 29,
web roll carry-in conveyers INl and IN2 are defined to
extend orthogonal with the pivotal 6hafts 11 and 12,
respectively (see Fig. 20).
~: :
The conveyers EX, INl and IN2 for transporting web rolls
14 to be used herein each constitute a kind of free flow
conveyer having the same con~titution as de~cribed refer-
ring to Fig. 8, and the conveyers IN3 and IN4 disposed ~o
the pits 56 and 57, re~pectively, likewi~e have a consti-
tution similar to the above conveyers. The pallet 35transported along the conveyer IN3 (IN4) i8 tran~ferred to
the web roll carry-in conveyer INl (IN2) in the pit 32
(33) after turning of the direction thereof with 90 by
means of the turntable 38 and forwarded orthogonally to
the swing arm mechanism 28 (29). Alternatively, a suit-
able shifting device can be u~ed for turning the direction
"", , " , . .. ,...... ,- : , :, . . : :, . ,: . ;. ,:.. ~" .: ",~ - . ,. .:. .~ ~ . .
1~2479~
- 34 -
of the pallet 35 transported by the conveyer IN3 ~IN4) to
be transported by the carry-in conveyer INl (IN2) instead
of using the turntable 38.
The roller chains 37 which cons~itute the conveyer driving
system in each of the above conveyers EX, INl, IN2, IN3
and lN4 have such a constitu~ion that the removable pallet
35 may be dispo~ed thereon to be transported thereby. The
constitution of ascending or descending the pallets 35 by
means of the pantographic lifters 34 disposed in the pits
31, 32 and 33 correspondingly at position~ adjacent to the
mill roll stand 10, respectively, should be understood to
be the same as described referring to Figs. 8 and 9.
In a device having such constitution, the lifters 34 can
be omitted from the above carry-in conveyers INl and IN2
by setting the turning angle of the swing arms 13 at a
greater degree whereby to allow stopping at any angle as
desired, when the web roll transporting conveyers disposed
at the outer areas of the two swing arm mechanisms 28 and
29, respectively, are carry-in conveyers, and further when
there is no li~itation for the width of the mill roll
stand 10. Namely, by adjusting the turning angle of the
swing arms 13 and the di~tance of the web roll 14 trans-
ported by the carry-in conveyer INl (IN2) relative to the
pivotal shaft 11 ~12), centering of the paper tube 15 in
the web roll 14 with the center of the center blocks 16
can be achieved.
. ,.
