JP3718030B2 - Plate-shaped material stacking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate-like material accumulating apparatus for accumulating plate-like materials such as a printing plate having a photosensitive layer formed on an aluminum support.
[0002]
[Prior art]
A printing plate used for newspaper printing or the like is once accumulated after being subjected to image exposure and then subjected to processing such as development, water washing, and gumming drying by an automatic developing device, and is carried to the next process. Such a printing plate is a plate having a photosensitive layer formed on a support such as an aluminum plate.
[0003]
The automatic developing device is provided with a stacking device for stacking the printing plates in the vicinity of the discharge port for discharging the printing plate after the drying processing, and the printing plates discharged after the drying processing is completed from the automatic developing device in order. They are stacked and integrated.
[0004]
An accumulating device for accumulating printing plates includes a movable chute that is provided in the vicinity of a discharge port of an automatic developing device and a receiving base that is disposed to face the movable chute. In this stacking device, when the printing plate discharged from the automatic developing device slides down on the movable chute and is placed on the movable chute, it is shaken by the driving means so that the surface of the movable chute faces the cradle. Move. As a result, the printing plate on the movable chute moves to the cradle and is placed in order on the cradle.
[0005]
[Problems to be solved by the invention]
However, the support such as aluminum forming the printing plate has a thin thickness of about 0.1 to 0.5 mm. For this reason, when the printing plate discharged from the automatic developing device slides down on the movable chute and comes into contact with a stopper provided at the lower end of the movable chute, the leading end of the printing plate may be bent. In addition, the movable chute is installed at a gentle inclination angle to slide down the printing plate at an appropriate speed. Therefore, a large installation space is required to move it to the cradle.
[0006]
The present invention has been made in view of the above-described facts, and when stacking plate-like objects such as printing plates, the tip of the plate-like object is not damaged such as bending, and the installation space is narrow. The purpose is to propose a stacking device for the plate-like materials.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a plate-like material stacking device for collecting the plate-like materials sent out from the previous step, wherein the plate is sent out from the previous step to the mounting surface inclined and directed to the previous step. a receiving base Jo material is placed, a supporting means for receiving and supporting the distal end of said plate-like object fed from the previous step, mounting the support means supporting the front end of the plate-like material of the receiving member a moving means for moving downward along the surface, the receiving portion for supporting the said support means is moved downward by the moving means provided at the lower end of the cradle receiving the distal end of the plate-like material the by said moving means in accordance with the downward movement of the support means and the mounting move upward along the surface of the pedestal, downwardly the tip along the mounting surface supported by the supporting means this include a押倒and means, defeat press said plate-like material is moved to the mounting surface The features.
[0008]
According to the present invention, when the front end of the plate-like object sent out from the previous process is received by the support means, the support means is moved downward along the mounting surface of the cradle. Thereafter, a receiving portion provided at the lower end portion of the cradle receives the support from the support means and supports it.
[0009]
As a result, the plate-like object is supported by the receiving portion without applying an impact to the tip, so that the tip does not break or be damaged.
[0010]
The moving means moves the push-down means upward along the upper surface of the cradle as the support means moves downward.
Thus, by the plate-like object to move the tip is supported by the support means downward, pushed down on the mounting surface of the cradle by押倒and means, the tip is supported by the receiving portion, location placing the cradle Is done.
[0011]
Therefore, it is not necessary to move the plate-like object in a lying state greatly to move it to the cradle, and the plate-like objects can be accumulated in a narrow space.
[0012]
The invention according to claim 2, a detecting means for detecting that said plate-like material is fed from the previous step, the tip of the plate-like material fed from the previous step on the basis of the detection result of said detecting means Control means for starting movement of the support means along the mounting surface of the cradle by the moving means when supported by the support means.
[0013]
According to the present invention, based on the detection result of the detecting means, the downward movement of the supporting means is started at the timing when the tip of the plate-like object contacts the supporting means. Thus, when the tip of the plate-like object comes into contact with and is supported by the support means, it is possible to prevent an impact from being applied to the tip of the plate-like object, and the plate-like object is not damaged.
[0014]
The invention according to claim 3, the guide plate for guiding the leading end of said plate-like object fed from the previous step towards the support means, that it is possible to stretch toward the support means from the previous step side Features.
[0015]
According to this invention, when the length along the feed direction (conveying direction) of the plate-like material sent out from the previous process is short, the guide plate can be extended. The tip of the object can be reliably supported between the guide plate and the support means and between the guide plate and the receiving portion .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
1 and 2 show a printing plate stacking apparatus 10 applied to this embodiment. The printing plate stacking apparatus 10 is disposed adjacent to the automatic processor 12 and stacks the printing plate 14 that is discharged from the automatic processor 12 after being developed, washed with water, gummed, and dried. The printing plate 14 is provided with a photosensitive layer on the surface of a support such as aluminum. The aluminum used as the support is formed in a rectangular plate shape with a thickness of about 0.3 to 0.5 mm, for example. That is, the printing plate stacking apparatus 10 stacks the printing plates 14 as plate-like members.
[0018]
As shown in FIG. 2, the automatic developing machine 12 has a delivery roller 18 disposed inside the discharge port 16. The feed roller 18 feeds out the discharge port 16 while sandwiching the printing plate 14 having been dried and transporting it in a substantially horizontal state. The automatic processor 12 is provided with a guide 20 in the vicinity of the discharge port 16. A guide plate 22 formed in a thin plate shape is attached to the guide 20, and the tip of the guide plate 22 is directed to a predetermined position of the printing plate stacking apparatus 10.
[0019]
When the leading end of the printing plate 14 sandwiched and conveyed by the feed roller 18 is discharged from the discharge port 16, it is guided to the printing plate stacking apparatus 10 by the guide 20 and the guide plate 22.
[0020]
FIG. 3 shows an example of the guide plate 22. The guide plate 22 is formed by a plurality of substantially box-shaped small guides 22A to 22D having different thicknesses and a substantially flat plate-shaped small guide 22E. A small guide 22B is slidably inserted into the small guide 22A, a small guide 22C is inserted into the small guide 22B, and a small guide plate 22D is slidably inserted into the small guide 22C. Further, a small guide 22E is slidably inserted into the small guide 22D.
[0021]
Accordingly, by inserting each of the small guides 22B to 22E into the small guides 22A, the length of the guide plate 22 (the length in the feeding direction of the printing plate 14) becomes the shortest. The tip of 22E can be most separated from the printing plate stacking apparatus 10. Further, as shown by a two-dot chain line in FIG. 3, by pulling out each of the small guides 22B to 22E from the small guide 22A, the length of the guide plate 32 can be increased, and each of the small guides 22B to 22E. The guide plate 22 can be made the longest and the tip of the guide plate 22 (the tip of the small guide 22E) can be brought closest to the printing plate stacking apparatus 10.
[0022]
As shown in FIGS. 1 and 2, the printing plate stacking apparatus 10 is provided with a receiving base 26 on a rectangular base plate 24. The cradle 26 is provided with a cradle plate 30 on which a printing plate 14 is placed on a bracket 28 attached on the base plate 24. The receiving plate 30 is held by the bracket 24 in a state in which the upper surface is inclined at a predetermined angle so as to face the discharge port 16 of the automatic processor 12, and the upper surface is placed in a state in which the printing plate 14 is inclined. It is the mounting surface 30A.
[0023]
A receiving bracket 32 is attached to the lower end portion of the receiving plate 30, and the printing plate 14 is supported by having one end abutting against the receiving bracket 32, and is mounted on the mounting surface 30 </ b> A of the receiving plate 30. Is done.
[0024]
A motor 34 is attached to the base plate 24 on the automatic processor 12 side. A drive shaft 34 </ b> A of the motor 34 is connected to a speed reducer 36. When the motor 34 is driven, this driving force is transmitted to the speed reducer 36, and the output shaft 36A of the speed reducer 36 is decelerated and rotationally driven. As shown in FIG. 2, a pulley 38 is attached to the output shaft 36 </ b> A of the speed reducer 36.
[0025]
On the other hand, as shown in FIGS. 1 and 2, a shaft 40 is disposed in the vicinity of the lower end portion of the receiving plate 30. The shaft 40 is rotatably supported by being arranged in parallel with the upper surface of the base plate 24 and the mounting surface 30A of the receiving plate 30 in the axial direction. The shaft 40 is disposed in the vicinity of the receiving bracket 32 at a position spaced apart from the mounting surface 30 </ b> A of the receiving plate 30 by a predetermined distance. Further, both ends of the shaft 40 protrude outward from both ends in the width direction of the receiving plate 30 (not shown).
[0026]
As shown in FIG. 2, a sprocket 42 is attached to the shaft 40 at one end projecting from the receiving plate 30 (the end on the back side of the paper in FIG. 2), and the other end (the paper surface in FIG. 2). A sprocket 42 and a pulley 44 are attached to the front side. An endless belt 46 is wound around the pulley 44 between a pulley 38 attached to the output shaft 36 </ b> A of the speed reducer 36. Accordingly, when the motor 34 is driven, the sprocket 42 is rotated integrally with the shaft 40.
[0027]
Sprockets 48 are axially supported above the respective sprockets 42 provided at both ends of the shaft 40, and chains 50 are respectively wound between the sprockets 42, 48 facing each other.
[0028]
The sprockets 42 and 48 have a constant distance between the linear portion of the chain 50 (between the sprocket 42 and the sprocket 48) and the extended surface of the mounting surface 30 </ b> A of the receiving plate 30, and at the end of the receiving plate 30. It arrange | positions in the position which becomes parallel with respect to.
[0029]
As shown in FIG. 1, the periphery of the chain 50 is covered with covers 52 and 54, respectively. A cover 52 that covers the periphery of one chain 50 (the right side in FIG. 1) covers the periphery of the belt 46 together with the pulleys 38 and 44.
[0030]
By the way, between the pair of chains 50, a guide shaft 56 serving as a push-down means and a hook 58 serving as a support means are respectively stretched in parallel with the shaft 40. The guide shaft 56 and the hook 58 move together as the chain 50 rotates.
[0031]
Two sets of guide shafts 56 and hooks 58 are provided, and when the chain 50 is rotated by a half circumference by the sprocket 42 and the sprocket 48, the other set of guides 56 and the hook 58 are located at the position where the one set of guide shaft 56 and the hook 58 exist. A shaft 56 and a hook 58 are positioned respectively. As shown in FIG. 1, a groove 60 (only the cover 54 side is shown in FIG. 1) is formed in the covers 52 and 54, and the guide shaft 56 and the hook 58 protrude from the groove 60. The guide shaft 56 is moved in the groove 60 by the rotation of the chain 50.
[0032]
As shown in FIG. 4, the hook 58 is formed in a substantially L shape, and when the chain 50 is moved and positioned on the placement surface 30 </ b> A side of the receiving plate 30, the L-shaped tip is upward. Installed to be directed to. As a result, at the position facing the mounting surface 30A of the receiving plate 30, the leading end portion of the printing plate 14 is accommodated in an L-shaped bent portion (hereinafter referred to as “support portion 58A”), and the printing plate 14 is mounted. It can be supported.
[0033]
As shown in FIG. 2, usually, one set of hooks 58 is located at an upper portion facing the mounting surface 30 </ b> A of the receiving plate 30, and the front end of the printing plate 14 discharged from the discharge port 16 is The guide 20 and the guide plate 22 guide the hook 58 toward the support portion 58A. Further, the hook 58 moves downward when the chain 50 is rotationally driven in the clockwise direction while supporting the front end of the printing plate 14.
[0034]
The movement trajectory of the hook 58 (indicated by a two-dot chain line in FIG. 2) intersects with the receiving bracket 32, whereby the front end of the printing plate 14 moved downward by being supported by the hook 58 is received by the receiving bracket. 32.
[0035]
That is, as shown in FIG. 4, the receiving bracket 32 is provided with cuts 32A at a predetermined interval, thereby forming a tongue piece 32B that supports the front end of the printing plate 14 between the cuts 32A. ing. Further, the hook 58 is formed with a cut 58B corresponding to the tongue piece 32B of the receiving bracket 32. As a result, the hook 58 moves downward and intersects the receiving bracket 32, whereby the tip of the printing plate 14 supported by the support portion 58 </ b> A of the hook 58 is transferred to the tongue piece 32 </ b> B of the receiving bracket 32.
[0036]
On the other hand, as shown in FIG. 2, the guide shaft 56 is attached to be on the upper side of the hook 58 when the guide shaft 56 is located away from the placement surface 30 </ b> A. For this reason, when the hook 58 provided on one guide shaft 56 supports the tip of the printing plate 14 and moves downward, the other guide shaft 56 moves upward. The guide shaft 56 that is moved upward is placed on the receiving plate 30, particularly from the intermediate portion in the feeding direction of the printing plate 14 that is fed from the discharge port 16 and supported at the tip by the hook 58 and moves downward. Push up to face 30A. Thus, when the leading end of the printing plate 14 is supported by the receiving bracket 32, the printing plate 14 is tilted toward the mounting surface 30 </ b> A of the receiving plate 30 and placed on the mounting surface 30 </ b> A.
[0037]
As shown in FIG. 2, an in-situ sensor 62 that detects the guide shaft 56 or the hook 58 is provided in the vicinity of the sprocket 42, and the guide 20 attached to the automatic processor 12 includes A plate detection sensor 64 that detects the printing plate 14 delivered from the discharge port 16 is provided.
[0038]
The original position sensor 62 and the plate detection sensor 64 are connected to the motor 34 (not shown), and the motor 34 is driven based on the detection results of the original position sensor 62 and the plate detection sensor 64.
[0039]
When one set of the guide shaft 56 and the hook 58 is in a predetermined position facing the placement surface 30A in the vicinity of the upper sprocket 48, the original position sensor 62 detects the other guide shaft 56 or the hook 58. This position is the original position of the hook 58 when the printing plate 14 is accumulated by the printing plate accumulating device 10, and the original position sensor 62 moves as the pair of chains 50 are rotated in the clockwise direction. When the guide shaft 56 or the hook 58 is detected, the motor 34 stops.
[0040]
In consideration of the rotational speed of the feed roller 18, when the tip of the printing plate 14 is fed from the feed roller 18 and detected by the plate detection sensor, the motor moves when the tip of the printing plate 14 comes into contact with the hook 58. 34 is activated, and a timer (not shown) is set so as to start the rotation of the chain 50.
[0041]
The operation of the present embodiment will be described below with reference to the flowchart shown in FIG. 5 and FIG.
[0042]
The printing plate stacking apparatus 10 is loaded at a predetermined position facing the discharge port 16 of the automatic processor 10 that sends out the printing plate 14, and starts to operate when a power switch (not shown) is turned on. In the printing plate stacking apparatus 10, prior to stacking of the printing plates 14, the time until the tip of the printing plate 14 sent out from the discharge port 16 of the automatic processor 12 reaches the hook 58 at the original position is reached. Entered. Instead of this time, the speed at which the feed roller 18 feeds the printing plate 14 (the feeding speed of the printing plate 14 in the automatic processor 12) and the feeding distance of the printing plate 14 from the discharge port 16 to the hook 58 are input. You may make it do.
[0043]
Accordingly, the printing plate stacking apparatus 10 sets a time T from when the leading edge of the printing plate 14 is detected by the plate detection sensor 64 until the leading edge of the printing plate 14 enters the support portion 58A of the hook 58. Is done.
[0044]
The flowchart of FIG. 5 shows an example of the operation of the printing plate stacking apparatus 10. In this flowchart of the printing plate stacking apparatus 10, in the first step 100, it is determined whether or not the plate detection sensor 64 has detected the printing plate 14 delivered from the discharge port 16 of the automatic processor 12.
[0045]
When the plate detection sensor 64 detects the printing plate 14 (Yes in step 100), the process proceeds to step 102 where a timer for measuring the time until the leading edge of the printing plate 14 reaches the hook 58 is set / Start it. Thereafter, in step 104, it is determined whether or not the measurement time has reached the time T by the timer.
[0046]
Here, when the time measured by the timer reaches time T and an affirmative determination is made in step 104, the routine proceeds to step 106 and the driving of the motor 34 is started.
[0047]
As shown in FIG. 6A, when the time T has elapsed since the leading edge of the printing plate 14 sent out from the discharge port 16 has been detected by the plate detection sensor 64, it is guided to the original position by the guide plate 22. It reaches a support 58A of a hook 58 and abuts on the hook 58. The motor 34 starts driving at the timing of whether or not the front end of the printing plate 14 contacts the hook 58.
[0048]
As a result, even if the tip of the printing plate 14 comes into contact with the hook 58, no impact is applied to the tip of the printing plate 14, and when the tip of the printing plate 14 comes into contact with the hook 58, the printing plate 14 is bent. Etc. will not be damaged.
[0049]
Even if the upper surface of the guide plate 22 is moved so that the printing plate 14 slides down and the tip abuts against the hook 58, the original position of the hook 58 is close to the height of the discharge port 16 of the automatic processor 12. Therefore, it is possible to prevent a large load from being applied to the front end of the printing plate 14, and also from this point, it is possible to reliably prevent the leading end of the printing plate 14 from being broken or the like. it can.
[0050]
On the other hand, as shown in FIG. 6B, when the motor 34 is operated, the chain 50 is rotationally driven, and the hook 58 moves downward while supporting the tip of the printing plate 14. The moving speed of the hook 58 at this time is preferably the same as or slightly slower than the conveying speed of the printing plate 14 by the feeding roller 18.
[0051]
That is, if the speed of moving downward of the hook 58 is faster than the speed at which the printing plate 14 is sent out, the leading end of the printing plate 14 that is in contact with the hook 58 will be separated from the hook 58 and the trailing end of the printing plate 14 will be fed out. When it is fed out from the roller 18, the printing plate slides down, and the leading end of the printing plate 14 may collide with the hook 58 or the receiving bracket 32 to be damaged.
[0052]
Since the downward movement speed of the hook 58 is the same as or slightly slower than the feeding speed of the printing plate 14, the tip of the printing plate 14 does not move away from the hook 58. Can be prevented.
[0053]
On the other hand, the hook 58 that has moved downward while supporting the tip of the printing plate 14 intersects the receiving bracket 32 provided on the receiving plate 30 in the vicinity of the sprocket 42. As a result, the front end of the printing plate 14 supported by the hook 58 is transferred to the receiving bracket 32, and the downward movement is stopped.
[0054]
At this time, if the length along the conveyance direction of the printing plate 14 is long, the rear end portion of the printing plate 14 is further fed by the feeding roller 18 so that the intermediate portion of the printing plate 14 is convex on the receiving plate 30 side. Then, it is sent out while being curved. If the length of the printing plate 14 along the conveying direction is short, the rear end of the printing plate 14 is separated from the feed roller 18 and the printing plate 14 is stretched between the hook 58 and the guide plate 22.
[0055]
At this time, since the guide plate 22 can be expanded and contracted toward the hook 58, when the long printing plate 14 is accumulated, it can be kept short. Further, when the printing plate 14 discharged from the automatic processor 12 is short, the guide plate 22 can be extended so that the tip of the guide plate 22 approaches the hook 58. Therefore, even if the printing plate 14 is short, it does not come off the guide plate 22.
[0056]
On the other hand, the other hook 58 different from the one that supported the tip of the printing plate 14 moves upward along the placement surface 30 </ b> A together with the guide shaft 56. As a result, as shown in FIG. 6C, the guide shaft 56 that has moved upward comes into contact with the intermediate portion in the conveyance direction of the printing plate 14, so that the printing plate 14 faces the mounting surface 30 </ b> A of the receiving plate 30. It will be pushed down.
[0057]
Therefore, the printing plate 14 whose front end in the transport direction is transferred to the receiving bracket 32 is pushed down toward the receiving plate 30 by pushing the rear end side toward the receiving plate 30 from the intermediate portion, and the mounting surface It is mounted on 30A.
[0058]
In the flowchart shown in FIG. 5, it is confirmed in step 108 whether or not the original position sensor 62 has detected the hook 58 (or the guide shaft 56). Here, when the hook 58 supporting the printing plate 14 moves around the sprocket 42 and reaches a position facing the original position sensor 62, the original position sensor 62 detects the hook 58. Determination is made and the routine proceeds to step 110. By moving to step 110, the motor 34 is stopped. As a result, the other hook 58 stops at the original position for receiving a new printing plate 14 discharged from the automatic processor 12.
[0059]
Thus, in the printing plate stacking apparatus 10, the hook 58 is disposed at a height close to the height of the discharge port 16 of the automatic processor 12, which is the previous process, and the tip of the printing plate 14 fed from the discharge port 16 is placed. When supported, the leading end of the printing plate 14 is moved downward while being supported and transferred to the receiving bracket 32 of the cradle 26. Therefore, when the leading end of the printing plate 14 is supported on the bracket 32, the printing plate 14 There is no impact on the leading edge, thereby preventing damage such as corner breakage at the leading edge of the printing plate 14.
[0060]
In the printing plate stacking apparatus 10, the leading end of the printing plate 14 is guided along the mounting surface 30A of the receiving plate 30 and placed on the receiving plate 30, and the printing plate 14 is moved by a movable chute or the like. Compared to a conventional stacking device that receives and rotates this movable chute, the space for moving the printing plate 14 can be narrowed as compared with the conventional stacking device in which the moving chute is mounted. .
[0061]
The present embodiment described above shows an example of the present invention and does not limit the configuration of the present invention. For example, the printing plate 14 that is a plate-like material is not limited to an aluminum support, and may be a support using a support such as a resin plate. In the present embodiment, the printing plate 14 is used as the plate-like material. However, the stacking apparatus to which the present invention is applied is not limited to the printing plate, but a plate-like material sent out from the previous process along the substantially horizontal direction. If it is, it can be used for accumulation of arbitrary plate-like objects.
[0062]
【The invention's effect】
As described above, according to the present invention, after the front end of the plate-like object discharged from the previous process is received by the support means, the front end of the plate-like object is supported and moved downward along the mounting surface of the cradle. And since it delivers to a receiving part, damage, such as a corner break, is not given to the front-end | tip of a plate-shaped object. In the present invention, by extending the guide plate that guides the tip of the plate-shaped object toward the support means, even a plate-shaped object having a short length along the feed-out direction is surely placed on the cradle. An excellent effect that it can be placed is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an external appearance of a printing plate stacking apparatus applied to the present embodiment.
FIG. 2 is a schematic configuration diagram showing a printing plate stacking apparatus.
FIG. 3 is a schematic cross-sectional view along the feeding direction of a printing plate showing a schematic configuration of a guide plate.
FIG. 4 is a perspective view of a main part showing a hook and a receiving bracket.
FIG. 5 is a flowchart showing an example of the operation of the printing plate stacking apparatus.
FIGS. 6A to 6C are schematic views showing the operation of the printing plate accumulating apparatus, respectively, FIG. 6A receiving the printing plate in its original position, and FIG. 6B supporting the leading end of the printing plate. The movement of the hook, (C), shows the pushing up by the guide shaft on the rear end side from the intermediate portion of the printing plate delivered to the receiving bracket.
[Explanation of symbols]
10 Printing plate stacking device (Plate-shaped stacking device)
12 Automatic processor (pre-process)
14 Printing plate (plate)
16 discharge port 18 delivery roller 22 guide plate 26 receiving part 30 receiving plate 30A mounting surface 32 receiving bracket (receiving part)
34 Motor 50 Chain 56 Guide shaft (pushing means)
58 Hook (support means)
62 Original position sensor 64 Plate detection sensor (detection means)

Claims (3)

A plate-like material accumulating device for accumulating plate-like materials sent out from a previous process,
A cradle on which the plate-like object to be sent out from the previous process is placed on a mounting surface that is inclined and directed to the previous process;
Support means receiving and supporting the leading end of said plate-like object fed from the previous step,
Moving means for moving the support means supporting the tip of the plate-like object downward along the mounting surface of the cradle;
A receiving portion for supporting receiving the distal end of the plate-like material from said support means is moved downward by the moving means provided at the lower end of the pedestal,
Wherein by said moving means in accordance with the downward movement of the support means and the mounting move upward along the surface of the cradle, moving downward the tip along the mounting surface supported by the supporting means and押倒by means defeat press the mounting surface the platelet to be,
An apparatus for stacking plate-like objects, comprising: A detecting means for detecting that said plate-like material is fed from the previous step,
Moving the leading end of the plate-like material fed from the previous step on the basis of the detection result of said detecting means along the mounting surface of the pedestal of the supporting means by said moving means when it is supported by the supporting means Control means for starting
The plate-shaped material stacking apparatus according to claim 1, wherein Said front said platelet guide plate guiding to toward the distal end the supporting means fed from step, the front, characterized in that the process side has a retractable toward said support means according to claim 1 or claim Item 3. The plate-like material stacking apparatus according to Item 2.

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