Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
13030a~`0
WEB DIVIDING AND REWINDING MACHINES
[Field of the Invention3
This invention relates to web dividing and rewinding
machines, and more particularly to rewind machines which are
adapted for dividing a relatively wide thin web material, such as
plastic or paper, into a plurality of longitudinally extending
strips or sub-webs of the desired widths, and rewinding each sub-
web into a separate rewind roll and carrying the rewind rolls out
of the machine.
The machine of the present invention can not only be
combined with an unwinding unit of a supply or mill roll as a
slitter-rewinder, but also combined with a machine for processing
the web material with desired web processing apparatus, such as
laminating or coating apparatus.
[Background of the Invention]
It is important to produce a high quality rewind roll.
There is the possibility that the web of the supply roll will be
stretched, wrinkled or cracked in rewinding operation so that a
marketable supply roll may be converted into an unmarketable
rewind roll. It is, therefore, necessary to produce a marketable
rewind roll. The quality of the rewind roll depends on the
contact pressure between the contact or touch roller and the
rewind roll and the tension to be applied to the web during
build-up by driving the contact roller, the rewind roll core or
~3~3(~0
both of them.
According to the present invention the contact pressure
between the contact roller and the rewind roll can be controlled
accurately. In order to stabilize the contact pressure between
the contact roller and the rewind roll, it is essential to avoid
the worst effects of mechanical vibration of the rewinding
machine.
When the contact pressure is sufficiently controlled, air
cannot enter into between the surfaces of the web to be wound.
Consequently, it is possible to produce a high quality rewind
roll which is wound tightly.
In order to produce the rewind roll wound tigthtly, the
ratio of the weight of the rewind roll to its volume must be
controlled to a desired value with respect to the diameter of the
rewind roll or the length of the web. According to our
experimental data, 8 to 14 microns thick film of polyester having
the specific gravity of about 1.4 is desirable to be wound up to
the roll having the winding density of about 1.35 to 1.36.
The slippage of the web build-up on the core depends upon
the condition of the surface of a web of sheet material. If the
coefficient of friction of the web is small, such as for example
a silicon coated film, slip occurs between the contacting
surfaces. On the other hand, even though the coefficient of
friction of the web is large, such as a base film of magnetic
tape, slip occurs easily between the cvntacting surfaces of the
web when air is entered into between them.
If a main portion of the rewinding machine vibrates in
operation, the contact roller and the rewind roll will be
13~30C~0
affected adversary. In accordance with the vibration of the
machine, the contact roller will touch to and apart from the
rewind roll repeatedly whereby air will enter into between the
surfaces or layers of the web to be wound. Thus slip occurs
between the contacting surfaces of the web. When the web is slid
in a transverse direction thereof, both sides of the rewind roll
will be deformed. On the other hand, when the web is slid in a
longitudinal direction thereof, the rewind roll will be loosened.
The slip between the contacting surfaces of the web will be
subjected to the formation of cracks and wrinkles, and the rewind
roll thus produced will be of unmarketable.
Recently, the machine for rewinding a high slip web material
at a high speed is requested. And also in order to rewind a
broad web, an oversized machine must be designed.
On the other hand, the user demands to obtain a large
diameter of the rewind roll. The rewind machine which is designed
and manufactured to satisfy these requirements must be modified
to avoid the worst effects of mechanical vibrations in operation.
The production capacity of the rewind rolls depends on the
operation of the rewind machine and to improve the production
capacity, it is necessary to carry the rewind rolls produced out
of the machine as quickly as possible.
[Prior Arts]
Japanese Patent Publication No. 45-20644 ~corresponding to
U.S. Patent No. 3,291,412) discloses one of typical rewinding
machines. The rewind machine shown in this publication has a
plurality of pairs of rewind arms pivotally mounted at their
13~30~0
inner ends, a plurality of rewind rolls carried by the arms at
their outer ends for receiving a strip of sheet material to be
wound, guide rollers for each of the rewind rolls, means for
mounting the guide roller for pivotally moving the guide roller
in a direction to engage the periphery of each of the rewind
rolls, means for controlling the contact pressure between the
guide roller and the rewind roll. The rewind machine of this
publication is characterized by providing with means for mounting
the guide roller so as to maintain the peripheral engagement with
the roll of the strip material, the control means being provided
with mean for controlling devices mounted on each of the mounting
means for controlling the contact pressure between the guide
roller and the rewind roll.
The above rewinding machine may have the following
disadvantages:
In the first place, the rewind arm supporting or pivot shaft
is pivotally mounted on a main frame as by means of pair of
bearings disposed at opposite ends of the shaft and the main
portion of the rewinding machine is not fixed adequately to the
base or frame so that the machine will vibrate easily in
operation. If the machine is of a large scale, the distance
between the supporting ends of the shaft is increased and the
rewind arms for holding a heavy roll must be mounted on the long
shaft in a limited space. Consequently, it is difficult to
improve rigidity of the machine and to prevent mechanical
vibration in operation.
In the second, each of the rewind arms will change in
~3~3(:1 ~0
position depending upon the change of the width of the web to be
divided and the change of the weight of the roll and also the
weight of the rewind roll will change with the change of the
diameter of the rewind roll and the weight of the web. In
addition to the above, the portion of the rewind arm bearing the
load of the rewind roll is not firmly supported, and the
rewinding machine vibrates easily in operation.
The rewind arm moves in an arc, and the center of gravity of
the pivot of the arm varies in position so that the rewind
machine will cause vibration.
Not only the bearings of the shaft but also a number of
rollers for guiding the strip are mounted on the frame, and the
vibration of the frame resulting from the high speed rotation of
the guide rollers may be transmitted to the support arms, rewind
arms, and rolls and may be increased in transmission.
In order to transmit the driving force from a fluid cylinder
to the rewind arm, the length of a york from its pivot to an
outermost end thereof is shorter than the length of the rewind
arm, and therefore the outermost end of the rewind arm may be
displaced greatly, even though the end of the york is displaced
slightly. Accordingly, if a connecting portion of the fluid
cylinder with a bracket, a connecting portion of the york with
the fluid cylinder, or the pivot of the rewind arm is worn out,
the rewind arm will vibrate in operation.
In the rewind machine according to the above publication, it
is impossible to control the contact pressure between the rewind
roll and the contact roller precisely.
Namely, in this publication it is pointed out that even
13~30~0
though the force to be applied to the contact roller against the
rewind roll is held in constant, the contact pressure between
the two will be changed in rewinding operation.
In the conventional rewinding machine, during the rewinding
operation, the contact pressure between the rewind roll and the
contact roll changes because the direction of the supply of the
strip to the contact roller is not kept in parallel to the
direction of the supply of the strip to the rewind roll.
Further, the line connecting the center of the contact
roller with the center of the pivot of the arm is inclined from a
vertical position and an inclination angle of the front contact
roller differs from one of the rear contact roller.
Conse~uently, when the width of the strip to be divided is
changed, the contact pressure will be changed.
In view of the above it is impossible to control the contact
pressure exactly.
Japanese Patent Publication No. 55-293 published on January
7, 1980 discloses a web rewinding machine in which a roll
supported on the supporting arms is pivotally moved in response
to the build-up of the rewind roll, the movement of the rewind
roll is detected and the supporting arms are kept in a vertical
position.
According to the above second publication, a plurality of
rewind rolls each of which is supported by an independent
supporting arm are contacted with a common contact roller by
means of pressure applying means arranged in the supporting arm,
the roll and/or the contact roller are driven to rewind the strip
13~3~0
divided by a slitter on the rewind roll core, each of the
supporting arms is pivoted to a common support means so as to
swing it against the common contact roller within a certain range
of small angles from its vertical position. The displacement of
each of the supporting arms according to the increments in
response to the build-up of the rewind roll is detected, and the
common support means is backed in a horizontal direction by
automatic control means. In this machine, however, there is a
defect for producing the vibration in operation.
In the rewinding machine shown in the second publication,
because the supporting arm is pivoted at its lower end and the
rewind roll is rotated at the upper end of the supporting arm, it
will be vibrated easily in operation, and impossible to suppress
the vibration.
The above second publication states that in order to prevent
the supporting arm from the vibration, it is possible to prepare
means for damping the vibration such as an oil damper may be
provided therewith. However, to hold the contact pressure
between the rewind roll and roller in a relatively small value
with a high accuracy, it is necessary to reduce the resistance of
the supporting arm against the oil damper. When the resistance
against the movement of the rewind arm is reduced, the effect for
suppressing the vibration of the supporting arm will be lost.
According to the machine described in the second
publication, both ends of a beam for mounting the core supporting
means is supported at an elevated position, and the core
supporting means are angularly moved to remove the rewind roll
from the machine.
13~30~I0
In addition, it is very hard to control the contact pressure
between the contact roller and the rewind roll precisely. That
is, in this ~achine, the supporting arm is inclined from its
vertical position at a small angle and a pair of springs are
arranged between the supporting arm and a supporter for
compensating the change of the contact pressure between the
rewind roll and the contact roller when the supporting arm is
inclined from its vertical position. In the inclined position
the supporting arm will receive the weight of the rewind roll and
the supporting arm to increase the angle of inclination.
In this machine the contact pressure between the rewind roll
and the contact roller will vary with the force to be applied to
the contact roller from the rewind roll during build-up.
On the other hand, the force to be applied to the spring is
kept in constant even if the supporting arm is inclined.
Consequently, it is impossible to control the contacting pressure
between the rewind roll and the contact roller by means of the
spring accurately.
In case where a heavy rewind roll of 10 or 20 kg for example
is produced, the rewind roll will change in weight in response to
the build-up of the rewind roll, and the contact pressure will be
changed accordingly.
Thus it is difficult to suppress the vibration of the
supporting means and to control the contact pressure between the
rewind roll and the contact roller effectively.
[Objects of the Inventionl
In view of the foregoing, the objects of the present
13~?3~0
invention are to provide:
1. a rewinding machine which can produce a high quality rewind
roll of high slip paper or plastic sheet material at high speed;
2. a rewinding machine which can rewind a ~road web material at
high speed; and
3. a rewind machine which can produce a broad width rewind roll
of a large diameter.
Furthermore, the object of the present invention is to
provide the rewinding ma_hine in which a core supporting means
is operated with substantially no vibration and the contact
pressure between a contact roller and a rewind roll can be hold
in a desired pressure at all times in operation.
A still further object of the present invention is to
provide a web subdividing and rewinding machine which can
effectively carry out the rewind roll out of the machine.
Other objects and features of the present invention will be
more apparent to those skilled in the art on consideration of the
accompanying drawings.
[Brief Description of the Drawings]
In the drawings, in which like reference numerals indicate
corresponding parts throughout the several views,
Figure 1 is a diagrammatic elevational view illustrating
the first embodiment of a web dividing and rewinding machine of
the present invention;
Figure 2 is a schematic plan view in partly in section, of
the machine shown in Figure l;
Figure 3 is a schematic block diagram illustrating a contact
i3t~3~
pressure between a rewind roll and a contact roller and driving
means of a distance adjusting means according to the present
invention:
Figure 4 is a schematic diagram illustrating the relation
between a contact roller and a rewind roll according to the
present invention;
Figure S is a schematic diagram explaining the relation
between a contact roller and a rewind roll according to the
conventional rewinding machine;
Figure 6 is an elevational view of the second embodiment of
the present invention, the view being taken in the direction of
the arrows substantially along the line VI - VI of Figure 7
according to the present invention;
Figure 7 is a schematic plan partly broken away to show
interior construction, of the machine shown in Figure 6;
Figure 8 is a schematic elevation of the third embodiment of
the present invention; and
Figure 9 is a schematic bloc~ view illustrating a contact
pressure between a contact roller and a rewind roll and driving
means of the distance adjusting means according to the third
embodiment of the present invention.
[The First Embodiment]
Referring now to Figure 1 which shows a first embodiment of
the present invention, a web dividing and rewinding machine 10
includes a front section 12 and a rear section 14 which are of
similar construction and operate in a similar manner. A
relatively wide supply web W of sheet material is guided from a
l3~3Qa~
supply roll (not shown) through a plurality of guide rollers 16
to a plurality of slitters or cutters 18 arranged between the
front section 12 and the rear section 14.
The slitter 18 itself is well known in the art and each of
slitters 18 includes a roller 20 with grooves and a cutter blade
21 which is slidably mounted on a guide beam 22 extending
parallel to a longitudinal axis of the roller 20. The cutter
blade 21 may be selectively used depending upon the thickness or
nature of the web W.
In order to divide or cut the web W of sheet material into
two or more same or different width sub-webs CW1, CW2, ... CWn,
the cutter blades 21 can be adjusted each other for a desired or
different sub-web widths.
Adjacent sub webs CW1, CW2 ... CWn are alternatively pass
partially around the respective guide rollers 24 of the front
section 12 and the rear section 14.
Each of the front section 12 and the rear section 14
includes a contact roller 26 and a core support means 30 holding
a core 28 on which the sub-web CW is wound. The axial length of
the contact roller 26 may be selected to correspond to the width
of the sub-web CW, and the longitudinal axis of the contact
roller 26 is mounted between a pair of contact roller support
arms 32 so as to arrange the longitudinal axis of the contact
roller 26 in parallel to the longitudinal axis of the core 28.
Because one end of each of the contact roller support arm 32 is
pivoted to a movable holder 34 and the longitudinal axis of the
contact roller 26 which is mounted on the other end of a pair of
13~?3~V
the contact roller support arms 32 is positioned in parallel to
the longitudinal axis of the core 28, the contact roller 26 can
be contacted with the rewind roll R under a controlled pressure
by suitable means such as a hydraulic cylinder means 58.
To mount a desired axial length of the contact roller 36
between a pair of support arms 32, the holder 34 of the support
arm 32 can be moved or slid along the longitudinal axis of a
guide beam 36 both ends of which are fixed to the frame of the
machine (not shown) and the holder 34 can be fixed to a desired
position.
The core support means 30 is provided with a clamp or chuck
means (not shown) for removably mounting the core 32 thereon. It
is possible to select a desired clamp means from among many types
thereof. The core support mean~ 30 can be moved parallel to
the longitudinal axis of the core 28 so that the core 28 having a
length which is adapted to wound up the sub-web CW may be mounted
between a pair of the core support means 30. A base 40 of the
core support means 30 can be slid along a distance adjusting
member 42 and fastened firmly to it at a desired position. In
order to rotate the core 28 for winding up the sub-web CW
thereon, the core support means 30 is provided with a suitable
driving device 44 such as, for example, an electric motor, the
output shaft of which is connected through suitable power
transmission mechanisms to the core 28.
According to the present invention, in operation of the
machine, as the rewind roll R increases in diameter, the core
support means moves in response to increments of the rewind roll
R in the direction of an arrow A in Figure 1 and the contact
13~J3(:~0
roller 26 is contacted with the rewind roll R at a desired
pressure without changing its position.
To this end, a base 46 to which the distance adjusting
member 42 is fixed can be moved on a pair or plurality of rails
48 laid on a floor or foundation structure. The base 46 carrying
heavy load is moved continuously in the direction of the arrow A
in from Figure 1 the original winding position at which the core
28 contacts with the contact roller 26 as the rewind roll R
increase in diameter in response to the build-up of the sub-web
CW on the core 28. There are no pivoted members in the core
support means 30, and no vibration will be caused by the rotation
of the rewind roll.
A foundation structure 50 on which the rails are laid may be
selected from a block of steel, a single thick plate or a
structure formed by combination of a plurality of frame members
in consideration of installation work of the machine and method
for guiding the web W.
The base 46 is provided with a plurality of engaging means
or shoes 52 which are constructed to slide or move the base along
the rail 48 smoothly without causing any vibrations. For this
purpose, it is possible to use conventional slide mechanisms,
linear bearing means and the like. Of course, in order to
support a heavy load by the engaging means, wheels may be used
therefor. If desired, the shoe 52 may be fixed to the foundation
structure 50 and the rail 48 may be fixed to the distance
adjusting member 42.
As shown in Figure 2, a pair of rails 48 support the front
13
13~3C1~
and rear section 12 and 14. According to our experiences a pair
of rails can sufficiently support the rewinding machine for the
web of 2 meters in width, three rails can support for the web of
4 meters in width, and four rails can support for the web of 6
meters in width without causing any vibrations.
There are provided with driving mechanisms 54 for moving the
base 46 in the direction of the arrow A shown in Figure 1 between
the foundation structure 50 and the base 46. A screw threaded
shaft and an electric or hydraulic motor for rotating the shaft
may be used for the driving mechanisms 54.
If it is necessary to insure the movement of the distance
adjusting member 42, it is advisable to use conventional
parallel motion mechanisms.
The web dividing and rewinding machine according to the
present invention is constructed as follows:
(1) The core support means is rigidly secured so that it
does not cause any vibrations in operation:
(2) The position of the core support means can be adjusted
in accordance with the width of the sub-web and the weight of the
rewind roll can be decided by the diameter thereof and the weight
of the web. And the portions for bearing a variable load is
supported for firmly, whereby the rewinding machine occurs no
vibration. The machine can distribute the weight of the rewind
rolls in accordance with the change of the width of the web.
(3) When the rewind roll is increased in diameter, the core
support means are not rotated or pivoted, and therefore no
vibration will be caused. The rewind roll can be mounted at
lower level of the machine.
13~3(;~
(4) The frame of the front section and the rear section
and the structure mounting the web guide rollers can be
constructed separately.
(5) In the conventional rewinding machine, there are
provided with at least three pivoting portions for connecting a
fluid cylinder with a bracket, an arm with the fluid cylinder and
the core supporting means with the frame, but in the present
invention, there is no pivoting portions. members.
Accordingly, the present invention can remove the
disadvantages which are pointed out in connection with the above-
mentioned Japanese Publication No, 45-20644. In addition to the
above, the present invention can obviate the disadvantages which
will be caused by the rewind roll building up at the upper end of
the support arm which is rotated angulary about a pivot at the
lower end thereof, as shown in the above-mentioned Japanese
Patent Publication No. 55-293.
According to our experimental data with respect to the
operation of the web dividing and rewinding machine of the
present invention, it is possible to rewind the web of plastic
material 12 microns thick at 600 r.p.m. without any vibrations in
all directions.
It is very important to suppress the vibration of the core
support means in order to rewind the web on the core effectively.
In addition, it is necessary to control the contact pressure
between the contact roller and the rewind roll precisely.
In the present invention, as stated above, it is taken into
account the prevention of the vibration and control of the
i3~3(;~0
contact pressure between the rewind roll R and the contact roller
26 in operation.
As shown in Figure 3, in order to press the contact roller
26 to the core 28 or the rewind roll R at a desired pressure, the
contact roller support arm 32 is cooperated with a rod 56 which
is actuated by means of a piston 60 of the fluid cylinder 58.
The operation of the piston 60 is controlled in a short stro~e by
output signals from a control unit 62.
It is preferable to move the core support means 30
continuously in the direction of the arrow A in Figure 3 together
with the distance adjusting member 42 by the driving means 54
which will be operated by output signals from the control unit
62. To this end, the movement of the distance adjusting member
42 may be actuated by control signals showing an increment of the
diameter of the rewind roll to be build-up.
If it is desired to move the contact roller stepwise with
detecting its small movement, it is preferably to move the
contact roller as little as possible. The control can be carried
out by a digital or analog computer system.
As stated in the foregoing, the contact roller 26 and the
rewind roll R can be moved linearly in response to the build-up
of the rewind roll. Consequently, in the present invention the
control of the contact pressure between the contact roller and
the rewind roll will not be affected by the build-up of the
rewind roll, but in the prior art it is difficult to control the
contact pressure since the rewind roll is pivoted to the
supporting arm or is rotated individually.
According to the present invention, as shown in Figure 4,
16
i3~3C~0
the direction of the sub-web CW to be supplied to the contact
roller 26 is always in parallel to the direction of the sub-web
CW to be supplied to the rewind roll R and the center of the
contact roller 26 is maintained in the same horizontal plane as
the center of the rewind roll R. Consequently, the pressure to
be applied to the contact roller will not be affected by the
pressure change to be applied to the contact roller owing to the
change of tension of the web. Further, since the arm for
supporting the contact roller is held in its vertical position,
the weight change of the contact roller can be ignored.
On the other hand, in the conventional rewinding machine
according to the above Japanese Patent Publication No. 45-20664
for example, as shown in Figure S, the direction of the sub-web
CW to be supplied to a contact roller T is not in parallel to the
direction of the sub-web CW to be supplied to the rewind roll R.
Even if they are in parallel to each other in the beginning of
the operation, it is impossible to hold the contact pressure at a
constant during the operation since the rewind roll R is rotated
about the pivot P of its support S.
According to the present invention, the operation of the
contact roller 26 and the core support means 30 can be controlled
separately.
It is possible to connect the fluid cylinder 58 to a load
detector or load cell 64 to obtain the electric signal indicating
an actual contact pressure between the contact roller 26 and the
rewind roll and then the signal can be fed back to the control
unit 62 to improve the stability of the operation.
. .
~3~?3C~1 0
In our test, the web dividing and rewinding machine of the
present invention is rewound the web of plastic sheet material 12
microns thickness at 600 r.p.m. under the contact pressure of 30
kg/m between the contact roller and the rewind roll, and the
contact pressure is changed in the range of about 1/100 kg or
less than 10 g unit. In the conventional rewinding machine,
however, the contact pressure is changed over 500 g to 1 kg.
Accordingly, the present invention can provide a high performance
rewinding machine.
[The Second Embodiment]
As shown in Figure 6, in the second embodiment 100 of the
web dividing and rewinding machine according to the present
invention, the guide rollers 16 for the web W and slitters 18 are
respectively arranged at the upper portion of the machine, the
web W is supplied to the slitters 18 through the guide rollers 16
from the upper side of the machine. This type is preferable to
keep free from dust. The base 46 and a frame 102 which
serves as a working table are rigidly secured to the distance
adjusting member 42 by means of welding, bolt and nut means and
the like. These elements can increase the weight to be applied
to the distance adjusting member 42, and improve prevention of
vibration. increased in weight and constructed stronglyto free
from the vibration.
As shown in Figure 7, the distance adjusting member 42 is
moved in a longitudinal direction of the web W along four rows of
rails 48 in order -~o distribute the load to be applied to the
distance adjusting member 42 to each of these rails. The distance
18
13~3(~'0
adjusting member 42 can only be moved smoothly in a longitudinal
direction of the web W under restriction of other movement.
According to the present invention, it is possible to design the
machine depending upon the width and weight of the web.
In the second embodiment of the present invention, driving
mechanisms 144 for reciprocating the distance adjusting member 42
in a longitudinal direction of the web W are supported on one end
of the rail 48 holding the base 46 and the distance adjusting
member 42. The driving mechanisms 144 include a screw sha~t 106
engaging with a shoe 104 fixed to the distance adjusting member
45, a servo motor 108 rotating the screw shaft 106 at a low
speed, a motor 110 rotating the screw shaft 106 at a high speed
for facilitating the movement of the distance adjusting member 42
in preparing for operating the machine or in carrying the rewind
roll out of the machine, differential gears 112, transmission
shafts 114 and bevel gears 116. A pair of the screw shafts 106
are driven simultaneously, the distance adjusting member 48 and
the core 28 can be moved to or away from the contact roller 26.
In the web dividing and rewinding machine 100 of the second
embodiment of the present invention, the rewind roll R can easily
be taken out automatically from the machine in a short time.
According to the conventional rewind machine, the rewind
roll is inclined together with the core support arms in order to
rest the rewind roll on the working table or to raise the roll by
hanging means.
On the other hand, in this embodiment, there is a space
between the contact roller 26 and the front section or the rear
section, and means 150 for removing or conveying the rewind roll
l3~?3~ao
R in an axial direction thereof can be arranged in the space.
The conveying means 150 include a belt conveyor 152 operated
by the driving apparatus (not shown) an elevator 154 and means
for driving means 156. If desired, the elevator 154 can be moved
by suitable means (not shown) in a transverse direction of the
axis of the the rewind roll R. In rewinding operation of the
front section 12 and the rear section 14 of the rewind machine
100, the conveying apparatus 152 are set back from their
operating position. When the rewinding operation has been
completed, the conveyor belt 152 is operated to carry the rewind
rolls R out of the machine.
In the second embodiment of the present invention, it is
preferable to extend the upper portion of the core support means
30 inwardly in order to install the conveying apparatus 152 at
the central position of the machine. If desired, a cart or wagon
may be used as the conveying means 150.
[The Third Embodiment]
According to the present invention, it is possible to fix
the contact roller and to press a rewind roll R against the
contact roller, if desired.
In the first and second embodiments according to the
present invention, the contact rollers 26 are respectively
arranged to each of the rewind roll cores 28.
In the third embodiment, on the other hand, as shown in
Figure 8, a single contact roller 226 is mounted to each of the
front section 12 and the rear section 14 regardless of the number
of the rewind rolls.
13~3Q~30
In order to press the contact roller 226 to a plurality of
rewind rolls R at a controlled pressure, the core support means
30 can be slid along the base 240 without causing any vibrations
with respect to the base 240.
In this embodiment, as shown in Figure 9, it is provided
with a control means 260 for controlling the contact pressure
between the rewind roll R and the contact roller 226 and means
262 for controlling the movement of the distance adjusting member
42.
That is, the control signal from the control means 260 is
applied to a pressure control means 238 so as to press the core
support means 30 to the contact roller 226 at a desired pressure.
In response to the build-up of the rewind roll R, the distance
adjusting means 42 is actuated by the control means 260 so as to
move it to the position corresponding to the position of the core
support means 30 on the base 240.
In the third embodiment of the present invention, it is
possible to dispose the conveyor apparatus at between the front
section and the rear section.
While the invention has been described in its preferred
embodiments, it is to be understood by those skilled in the art
that the foregoing and other changes in form and details can be
made therein without departing from the spirit and scope of the
invention.
