Note: Descriptions are shown in the official language in which they were submitted.
~ 3 ~
BACKGROUND OF THE INVENTION
Field of the Invention
This invention relates generally to a tape recording
and/or reproducing apparatus, and more particularly is directed
to a device thereof for loading a tape-like substance, in which
the tape-lik~ substance, such as tape, film or the like, is
conveyed with air through a duct as a tape path. The device of
this invention is best suited for an open reel tape recording
and/or reproducing apparatus.
DescriPtion of ~he Prior Art
;
In relation to a tape recording and/or reproducing
apparatus, various devices for loading a tape-like substance are
already known, in which the tape-like substance is automatically
con~eyed with air (by suction) from a supply-reel's side to a
take-up-reel's side through a predetermined tape path, for
example, as di~closed in U.S.P.-3,127.120 and U.S.~. 3,334,831.
However, such a device has been applied to a magnetic
recording apparatus having stationary heads and a simple tape
path, so that it is dif~icult to apply ~uch a device to a
magnetic recordins and/or reproducing apparatus which has a
rotary head and a complex tape path in~luding a peripheral path
along the periphery of the rotary head.
; ~
~: ;`.~ ,:
.:, ~. ,
: ~ '' - . ''" ` .. , .. -
. ~ .
~ 3 ~
Such a magnetic recording apparatus as to have a rotary
durm and an automatic device for loading a tape-like substance by
suction, has been disclosed in U.S.P. 3,940,791, U.S.P. 3,938,041
and so forth, but in such an apparatus, a tape is drawn out by
suction within airtight casings as illustrated in the drawings of
the documents, so that the apparatus is apt to be large.
Moreover, it is difficul~ to apply such a device to a magnetic
recording and/or reproducing apparatus having a large angle of
contact of a tape with a rotary drum.
Thus, such devices as mentioned above are not applied to
a magnetic recording andtor reproducing apparatus having a
complex tape path for winding the tape-like substance on the
periphery of the rotary head at a large ansle of contact.
OBJECTS AND SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to
; provide a device for loading a tape-like substance, in which a
guide plate is provided in a tape ~ath so as to have the leading
end of the tape-like substance conveyed with air within the tape
path from the inlet of thereof, and guided firmly to the begining
of a peripheral tape path which is disposed along the periphery
of a guide drum, so that the tape-like substance is smoothly
loaded without any inadvertent trouble.
~ ~ '
` -2-
.,:, ~ ~
.:
~ 3 ~
Another object of the invention is to provided a device
for loading a tape-like substance, as aforesaid, in which the
guide plate is made movable and is removed from the tape path
lest the guide plate should interfere with the movement of an
entrance guide and an exit guide which are moved when recording
on or reproducing from the tape-like substance after tape loading
is performed, so that the travel of the tape-like substance is
accurately regulated by the entrance and exit guides, because
they are firmly moved to predetermined respective positions.
Thus, recording on or reproducing from the tape-like substance
can be performed with high accuracy, and the device can be
applied to a magnetic recording and/or reproducing apparatus
having such a complex tape path as to be wound on a rotary head,
and a large angle of contact of the tape with the rotary head.
A further object of the invention is to provide a device
for loading a tape-like substance, in which an entrance guide and
an exit guide are moved to three positions: third positions
spaced apart sufficient distances from a tape path when the
tape-like substance is loaded with air; ~irst positions situated
nearest to a quide drum when recording on or reproducing from the
tape-like substance is performed; and second positions spaced
apart small distances from the guide drum when the tape~like
substance is in rewind or fast-forward mode, so that when loaded
:~ ~
.
-3-
~ .
: , ~ :
,~ ' - ' ' ' ' '
~ 3 ~
with air, the tape-like substance can move without any
interference of the entrance and exit guides, and loading of the
tape-like substance is safely and smoothly performed; when
recording on or reproducing from the tape-like substance is
performed, the tape-like substance can run accurately along a
tape lead provided on the guide drum, and recording or
reproducing is performed with high accuracy; and when in rewind
or fast-forward mode, the tape-like substance is prevented from
receiving damages due to contact with the flange of the entrance
guide and so for~h, and can run safely and smoothly at high
speed.
According to an aspect of the present invention, there
is provided a device for loading a tape-like substance, in which
a ~lide plate for leading the tape-like substance together with
air to the begining o~ a peripheral path of a tape path which
extends along a guide drum, is provided so as to be reciprocatory
moved ~rom an active position where the tape-like substance is
guided ~ogether with the alr within the tape path, to a inactive
position turned aside from the acti~e position, or vice versa.
When the tape-like substance is loaded, the guide plate is
located in the active posltion, and when recording on or
reproducing from the tape-like substance is performed, the guide
~plate is located in the inactive position.
::
::
~ 4-
: ` :
- ':
q~ 3
Furthermcre, there is provided another device for
loading a tape-like substance, in which an entrance guide and an
exit guide are respectively arranged near the begining and the
end of a peripheral path provided midway in a tape path, and
extending ~long a guide drum, so as to have the tape-li.ke
substance running helically along the guide drum by the help of a
tape lead provided in the periphery of the guide drum after the
tape-like substanee is loaded, and can be moved by a drive
mechanism to a first position situated nearest among all to the
guide drum within the tape path, a second position spaced a
little more apart from the guide drum than ~he first position
within the tape path, and a third position outside the tape path
and largely apart therefrom.
BRIEF DESCRIPTION OF THE DRAWINGS.
Figures lA and 1~ are enlarged front views to show the
action of a guide plate included in a device for loading a
tape-like substance according to an embodiment of this invention;
., ~ . .
~ Figure 2 is a perspective view of the guide plate of
Figures lA and lB;
Figure 3 is a general, front view of the device
including the guide plate of Figure l;
: Figure 4 is perspective view of the device of Pigure 3;
Figure 5A to 5C are enlarged fron~ views to show the
actions of an entrance guide and an exit guide;
~: ~; Figare 6 is a development viewed in a direction of
~; ~ arrows VI-VI on Figure 5B;
-5-
~ ::
. ~ .
:; ~ , ' . ;, ~ . : -
, ~ - `
.
:
~3~
Figure 7 i5 a development viewed in a direction of
arrows VII-VII on Figure 5B; and
Figure ~ is a partial, enlarged development on Figure 7.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
~ n embodiment of the present invention applied to a
device for loading a tape-like substance for an open-reel-type
video tape recorder will be hereinafter described with reference
to the accompanying drawings.
As shown in Figures 3 and 4, a supply reel base 2 and a
take-up reel base 3 are arranged to be spaced from each other in
the upper right and left positions of the front face la of the
body 1 of an upright video tape recorder (hereinafter described
as VTR), and mounted on the supply reel base ~ and the take-up
reel base 3 are a supply xeel 5 on which a magnetic tape 4 as a
tape~like substance is wound, and a take-up reel 6 or taking up
the magnetic tape 4, respec~ively. Moreover, a rotary head drum
7 as a guide drum is arranged on.the ront face la of the VTR 5
body 1 nearly under the supply reel 5.
A tape path 9 formed in the front face la of the VTR's
body 1 nearly below the supply and take-up reels 5 and 6, has an
inlet 9a which is opened near the lower part of ~he supply reel
5, an outlet 9b which is opened in such a position as to be
spaced apart a predetermined distance from the lower part of the
6-
'. '
.. . .
take-up reel 6, and a peripheral path 9c of laid U-shape which is
provided aiong the periphery 7a of the rotary head drum 7.
Moreover, a supply side path 9d from the inlet 9a to the begining
9f of the peripheral path 9c is of laid U-shape, and a take-up
side path 9e from the end 9g of the peripheral path 9c to the
outlet 9b gradually rises toward the outlet 9b, so that as a
whole, the tape path 9 describes an unsharp curve crooked in
zigzag.
The tape path 9 is formed like a duct with a front panel
10 attached to the front face la of the V~R's body 1, and an
openable front cover 11 swingable on hinges 12 which are secured
to the VTR's body 1. Note that the front cover 11 i5 made of
transparent synthetic resin, and locked by a locking means (not
shown) when closed as indicated in chain-dotted lines in Figures
3 and 4. Moreover, the tape path 9 is lower at the side of the
inlet 9a, and higher at ~he side of the outle~ 9b, in order to
make the magnetic tape 4 helically wind on the periphery 7a of
the rotary head drum 7, so that there is a difference in height
between the supply reel 5 and the take-up reel 6, that is, the
former is lower than the latter.
Arranged along the supply side path 9d of the tape path
9 are a guide post 14, a tension detector 15, a guide roller 16,
a full-width erasing head 17, an entrance guide 18 and so forth,
: ~ .
~: -7-
,
; ' , ' . , ,' : . .
.. ' ' ' ', ', .
and arranged along the take up side path 9e thereof are an exit
guide 19, a tape guide 20, an impedance roller 21, an audio
erasing head 22, an audio recording/reproducing head 23, an audio
monitoring head 24, a capstan 25, a pinch roller 26, a guide
roll~r 27 ~nd so forth.
A plurality of air outlets 29a to 29e are provided along
the lower wall of the tape path 9 and connected to one or more
blowers 30, 31 through respective air paths 32a to 32e.
Moreover, the air inlet 33 of one 31 of ~he blowers ~ommunicates
with a plurality of air inlets (not shown) which are provided in
the periphery of the hub 6a of the take-up reel 6, so that the
leading end 4a of the magnetic tape 4 is attrac ed by suction to
the periphery of the hub 6a to be wound on the take-up reel 6.
A sensor 35 arranged at the side of the ou~let 9b of the
tape path 9, comprises a light emitting element 3~ and a
photosensor 37 which are respectively disposed on opposite sides
of the tape pa h 9, and light emitted by the light emitting
element 36 crosses the tape path 9 and strikes the photosensor
37.
Now, the loading operation o~ the magnetic tape 4 will
be hereina ter d~scribed.
8-
:
~ `` '~~ . , .
~; ~ ' ` ' .
~3~
As shown in Figure 3, as soon as the blowers 30 and 31
are put in action, air is blown off from the plurality of air
outlets 29a to 29e to the tape path 9 in directions of arrows a
to e, and at the same time, air sucked from the periphery of the
hub 6a of the take-up reel ~ in a direction of arrow f, flows to
the air inlet 33 of the blower 31.
After the leading end 4a of the magnetic tape 4 wound on
the supply reel 5 is made to be brought near the inlet 9a of the
tape path 9, the supply reel S is mannally or automatically
rotated in a direction of arxow g so as ~o make the magnetic tape
4 pay out of the supply reel 5. Thus, the magnetic tape 4 is
conveyed with air blown off in the directions of arrows a to e
from the air outlets, as indicated in solid lines in ~igure 3,
that is, the magnetic tape 4 is conveyed in a direction of arrow
h from the inlet 9a to the outlet 9b through the tape path 9, in
turn, through the supply side path 9d, the peripheral path 9c and
the take-up side p~th e.
When ~he leading end 4a of the magnetic tape 4 is to
reach the outlet 9b of the tape path 9, the leading end 4a
intercepts the ray of light 38 emitted by the light emitting
element 36, so that the sensor 35 detects the leading end 4a
:: because light does not strike on the photosensor 37. Then, a
timer (not shown) is put in action and after a predetermined
time, the bIower 30 is automatically stpped.
. ' .
g_
,
:; . ' ~' :' ~ ` `. . `
~ ` , '` , , : :
.
~ 3 ~ $
During the predetermined tirne to which the timer is set
(strictly speaking,it is necessary to add the time required until
the motor of the blower 30 stops, because the motor rotates by
inertia even after the electric power is off.), the leading end
4a of the magnetic tape 4 is paid out o~ the tape path 9 through
the outlet 9b thereof by a predetermined length in a direction of
arrow h', and as soon as the blower 30 stops, the magnetic tape 4
is not conveyed further with air, because air is not blown off
from the air outlets 29a to 29b to the tape path 9. Thus, when
the supply reel 5 has been manually rotated in the direction of
arrow g, we may stop r~tating of the supply reel 5, and when the
supply reel 5 has been automatically rotated, the supply reel 5
is automatically stopped.
Then, the leading end 4a vf the magnetic tape 4 is
raised by hand in a direction of arrow i, and firmly wound on the
hub 6a of the take-up reel 6 by suction of the blower 31 as
indicated in chain-dQtted lines in Pigure 3. Ther after, the
blower 31 is also stopped. Note that it is not always necessary
to wind the leading ~nd 4a of the magnetic tape 4 on the hub 6a
of the take-up reel 6 by suction as mentioned above, but the
leading end 4a may be engaged the hub 6a by such engaging means
as to make the leading end 4a insert into a slit which is
provided in the hub 6a, or by other engaging means.
~ ~ .
~::
.
1 0 -
. ~
' ` .
Next, when a stand-by button is depressed, the rotary
head drum 7 is, firstly, rotated in a direction of ~rrow j as
shown in Figure 3, and then, the tension detector 15, the
full-width erasing head 17, the entrance guide 18, the exit guide
19, the tape guide 20 and other movable members are moved from a
backward position indicated in dotted lines to a forward position
indicated in chain-dotted lines in Figure 3. Thus, the magnetic
tape 4 is helically wound at a predetermined angle on the
periphery 7a of the rotary head drum 7, and is extended from head
or guide to head or guide.
Next, when a play button is depressed, the capstan 25
is, firstly, rotated in a direction of arrow k as shown in Figure
3, and then, the magnetic tape 4 is pressed against th~ capstan
2S by the pinch roller 26, and at the same time, the supply reel
5 and ~ake-up reel 6 are rotated in directions of arrows g and 1,
respectively. The magnetic tape 4 on a tension runs at constant
speed in the direction of arxow h within the tape path 9, and
desired recording or reproducing is performed.
Memberwhile, if the magnetic tape 4 is inadvertently
cut, or completely wound on the take-up reel 6 or the supply reel
5 during recording or reproducing, or fast-forward mode or rewind
::
~ mode,:and thereby, the~light 38 emitted by the light emitting
: : i
~ :element 36 again strikes the photosensor 37, a tape-running stop
- 1 1 -
:: , . :
: .
: ~ ; `
,
. .
~:
circuit (not shown), for example, is put in action on a judgement
that there is no magnetic tape 4 within the tape path 9, so that
the rotary head drum 7 and a system for moving the magnetic tape
4 are automatically stopped.
Mow, a drive mechanism for driving the entrance guide
18, the exit guide 19 and a guide plate 54 which are provided
near the begining 9f and end 9g of the peripheral path 9c of the
tape path 9, will be hereinaf~er described with reference to
Figures lA to 2.
The entrance guide 18 and the exit guide 19 are mounted
on respective sliders 40a and 40b through respective supporting
blocks 18a and l9a, and on the slider 40b, the tape guide 20 is
also mounted. The sliders 40a and 40b are reciprocatory in
directions of arrows m or m', and n or n' along a pair of guide
rails 41a and 41b, respectively. The guide rails 41a and 41b are
fixed to the fron~ face la of the VTR's body 1, and between the
guide rails.41a and 41b, a s,top 42 for the sliders 40a and 40b
projects from the front face la. Moreover, a pair of arms 44a
and 44b swung on respective fulcrum pins 93a and 43b which
project from the front face la of the VTR's body 1, are connected
to the respective sliders 40a and 40b through rods 46a and 46b
surrounded by springs 4Sa and 45b, and links 47a and 47b
connected to the rods ~6a and 46b.
,:
'
A driving shaft 49 is rotatably supported by the VTR's
body 1 and driven by a geared motor 48. A plate 50 formed
integrally with the driving shaft 49 is connected to one 44a of
the arms by a link Sl, and further, the arm 44a is connected to
the other axm 44b by a link 52~
In Figure lA, the guide plate 54 lies near the begining
9f of the peripheral path 9c, and that within a reciprocation
path of the supporting block 18a which extends in a direction of
arrows m and m'. The guide plate 54 shown in Figure 2 has a
U-shaped section comprising a main guide plate 54a as the
web-portion thereof and auxiliary guide plates 54b as the
flange-portions thereof, and further, an arm 54c projecting from
the guide plate 54 is swung in a direction of arrows p and p' on
a fulcrum pin 55 which projec~s from the VTR's body 1. Moreover,
the guide plate 54 is connected to the arm 44a by a link 56, and
the full width erasing head 17 is secured to an end position of
the arm 54c in opposed ~ela~tion with that of the guide plate 54
with resepect to the fulcrum pin 55; so as to be swinsable in the
direction of arrows p and p'.
Thus, when the magnetic tape 4 i5 loaded as shown in
Figure lA, the plate 50 is rotated in a direction of arrow o' by
the geared motor 48, so that the entrance and exit guides 18 and
19 and the tape guide 20 are moved in the direction of arrcws m'
13-
i `
: ~ , , ' , .
: ~ . -, . . .
and n' to be located at the outside of the tape path 9, and never
interfere with conveyance of the magnetic tape 4 in the direction
of arrow h within the tape path 9. Moreover, at the time when
the magnetic tape 9 is loaded, the guide plate 54 moved in the
direction of arrow p, is located in an active position within the
tape path 9, and on the contrary, the full-width erasing head 17
is located at the outside of the tape path 9.
Thus, the guide plate 54 comprising the main and
auxiliary guide plates 54a and 54b, firmly guides the leading end
4a of the magnetic tape 4 conveyed within the tape path 9, to the
begining 9f of the peripheral path 9c with air blown off in the
direction of arrow c ~rom the air outlet 29e, so that the leading
end 4a is smoothly led from the supply side path 9d to the
peripheral path 9c.
Next, when the stand-by button is depressed as shown in
Figure lB after the magnetic tape 4 is completely loaded, the
plate 50 is ro.tated in a direction of arrow O by the geared motor
48, so that one 44a of the arms is ~wung in a direction of arrow
g through the link 51, and further, the other arm 44b is swung in
a dlrection of arrow r through the link 52. As the result, the
sliders 40a and 40b are moved in the directions of arrows m and n
by the arms 94a and 44b through the rods 46a and 46b and links
47a and 47b, respectively, so that the entrance and exit guides
14-
: :
:'
.
18 and 19 and the tape guide 20 are located in forward positions
near the periphery 7a of the rotary head drum 7, and at that
time, the sliders 40a and 40b are pressed against the stop 42 due
to the forces of the springs 45a and 45b, respectively, and
locked because the center lines of the link~ 47a and 47b deviate
a little from those of the rods 46a and 46b.
Meanwhile, as the guide plate 54 is moved in the
direction of arrow p' by the arm 44a rota~ed in the direction of
arrow q through the link 56, prior to the movement of the slider
40a in the direction of arrow m, the supporting block 18a of the
entrance guide ~8 m~ved in the direction of arrow m by the slider
40a, does not inadvertently abut against the guide plate 54. In
other words, the guide plate 54 is swung in the direction of
arrow p' without meeting any obstruction by the entrance guide 18
and supporting block 18a which are moved in the direction of
arrow m, and located at the outside of the tape path 9, and at
the same time, the full-width erasing head 17 is located in the
tape path 9.
Thus, the magnetic tape 4 is helically wound on the
periphery 7a of the rotary head drum 7 with high accuracy at a
predetermined angle of contact, and the full-width erasing head
17 comes in contact with the magnetic tape 9, so that recording
on, or reproducing from the magnetic tape 9 is performed under
the state that the tape running path is accurately regulated with
respect to the rotary head drum 7.
:
:~ -15-
.,~.,~, ............... .
Now, a drive mechanism of the entrance and exit guides
18 and 19 will be hereinafter described in detail with reference
to Figure 5A to 8.
As shown in Figure 5A, two sensors 60 and 61 are secured
to the front face la of the VTR's body 1 in position of point
symmetry with respect to the driving shaft 49, and each of them
has a light emitting element and a photosensor (not shown). When
the light emitted by the light emitting element strikes the
photosensor, signal (O) is made, and when the light emitted by
the light emitting element can not strike the photosensor due to
the obstruction by a shutter, signal ~1) is made. In addition,
three shutters 62, 63 and 64 are provided on the outer periphery
of the plate 50.
When the magnetic tape 4 is to be loaded as shown in
Figure 5A~ the plate 50 is rotated in the direction of arrow o'
by the geared motor 48, and the entrance and exit guides 18 and
19, and the tape guide 20 are moved in the directions of arrows
m' and n' from near the begining 9f and end 9g of the peripheral
path 9c, and the entrance and exit guides 18 and 19 are located
in third positions P3 largely outside the tape path 9 as
` : ~
indicated in two dots-and-dash lines in Figures 6 to 8, and as
shown in Figure 5A, it is detected by the sensor 60 making signal
(0), and the sensor 61 meeting the obstruction by ~he shutter 62
and making signal (l), that the entrance and exit guides 18 and
19 are in ~he third positions P3, so that the geared motor 48 is
stopped.
~ 16-
:~':
: :
Thus, when the magnetic tape 4 is loaded with air, the
entrance and exit guides 18 and 19, and the tape guide 20 do not
interfere with conveyance of the magnetic tape 4 to the direction
of arrow h at all, so that the magnetic tape 4 is safely and
smoothly loaded in the tape path 9.
Next, when the stand-by button is depressed after the
magnetic tape 4 is completely loaded, the plate 50 is rotated in
the direction of arrow o by the geared motor 48 as shown in
Figure 5B; the arm 44a is swung in the direction of arrow q by
the plate 50 through the link 51; the arm 44b is swung in the
direction of arrow r by the arm 44a through the link 52; and the
sliders 40a and 40b are moved in the directions of arrows m nd n
by the arms 44a and 44b through the rod~ 46a and 46b, and the
links 47a and 47b, respectively, so that the entrance and exit
guides 18 and 19 are located in first positions Pl very adjacent
to the periphery 7a of the rotary head drum 7 as indicated in
solid lines in Figures 6 to 8, and also the tape guide 20 is
located near the perlphery 7a of the rotary head drum 7.
Moreover, it is detected, zs shown in Figure 5B, by the sensor 61
making signal (O), and the sensor 60 meeting the obstruction by
:
;the shutter 62 and making signal (1~, ~hat the entrance and xit
; guides are in the first positions Pl, so that the geared motor 48
is stopped. Note ~hat at that time, the slidess 40a and 40b are
, ~
~`
~ -17-
:~
pressed against the stopper 42 due to the forces of the springs
45a and 45b, respectively and locked because the center lines of
the links 47a and 97b deviate a little those of the rods 46a and
4~b.
Thus, as shown in Figures 6 to 8, the magnetic tape 4 is
helically wound with high accuracy on the periphery 7a of the
rotary head drum 7 at a predetermined angle of conta~t along a
tape lead 65. Note that the rotary head drum 7 comprises an
upper rotary drum 7b and a lower stationary drum 7c, and the t~pe
lead 65 is formed in the periphery of the lower stationary drum
7c.
When the play button is thereafter depressed, the
magnetic tape 4 led with high accuracy by the tape lead 65 runs
at constant speed along the periphery 7a of the rotary head drum
7, so that recording on or reproducing from the magnetic tape 4
is accurately performed.
Next, when the rewind ~ut.ton or fast-forward button is
depressed, the plate~50 is rotated a little in the direction of
arrow o' by the geared motor 48 as shown in Figure SC; the arm
44a is swuns a little in a direction of arrow q' by the plate 50
through~the link 51; the arm 44b is swung a little in a direction
of arrow r' by the arm 44a through the link 52; and the sliders
40a and:40b are moved a llttle in the directions of arrows m' and
:
::
'~
'' ': ' "
n' by the arms 44a and 44b through the rods 46a and 46b, and the
link 47a and 47b, respectively, so that the entrance and exit
guides 18 and 19 are located in second positions P2 within the
tape path 9 so as to be spaced a little more apart from the
periphery 7a of the rotary head drum 7 than the first positions
P1 as indicated in chain-dotted lines in Figures 6 to 8, and also
the tape guide 20 is located within the tape path 9.
At that time, the status of the entrance and exit guides
18 and 19 located in the second positions P2, is detected by the
sensors 60 and 61 which meet the respective obstructions by the
shutters 63 and 64 to make signals (1), so that the geared motor
48 is stopped.
In the embodiment, as shown in ~igure 8, the distance
11 between the first position P1 and the third position P3 is
about 44 mm, and the distance 12 between the first posi~ion Pl
and the second positic~n P2 is about 10 mm In addition, when the
entrance guide 18 is moved to the third po~sition P3, the upper
. _ . . . .
edge 4b of ~he magnetic tape 4 which becomes free from the
entrance guide 18, rises to a position indicated in dotted lines
in Pigure 8, and displacement H of the upper edge 46 caused
thereby as shown in Figure 8 is 20 to 30 mm.
:~ - 1 9 -
:~
.
Thus, angle ~1 made hy the upper flange 18b of the
entrance guide 18 in the first position Pl with the upper edge 4b
of the magnetic tape 4 is larger enough than angle ~2 made by the
upper flange 18b of the entrance guide 18 in the second position
P2 with the upper edge 4b of the magnetic tape 4, so that the
magnetic tape 4 which runs at high speed, does not run on the
upper flange 18b of the entrance guide 18, and does not suffer
any damage.
According to the above device for loading the tape-like
substance, the guide plate ~4 guides the magnetic tape 4 together
with the air to the begining 9f of the peripheral path 9c, so
that the leading end ~a of the magnetic tape 4 conveyed from the
inlet 9a of the tape path 9 i5 firmly led to the peripheral path
9c. Moreover, the guide piate 54 does not interfere with the
movement of the entrance guide 18 at the time when recording on
or reproducing from the magnetic tape 4 is performed, because the
mobile guide plate 54 is ~oved to the outside of the tape path 9
beforehand.
According to the another device of the invention, the
entrance and exit guides 18 and 19 are located in the three
positions: the thlrd positions P3 outside the tape path 9 when
the magnetic tape 4 is loaded; the first positions Pl situated
nearest among all to the guide drum 7 when recording on, or
xeproducing from the magnetic tape 4 is performed; and the second
positi~ons P2 spaced a little apart from the guide drum 7 when the
magnetic tape 4 is in rewind mode or fast-forward mode.
~20-
, ' ` ''
.~
