JPH0130744B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to an automatic processing device for signature printed matter discharged from a rotary press, and particularly to an automatic processing device for horizontally accumulating signature publications and horizontally accumulating small bundles of signatures. The object of the present invention is to provide a device for creating a small bundle of signatures.

``Prior art'' There are many conventional devices of this kind that have already been published, but all of them have a natural falling part,
Since it has a part that separates the printed surface, it includes factors that cause irregularities in the printed matter, creases, scratches, etc.

To illustrate this, Fig. 5 is the first conventional example, which is an explanatory view of the main part of Japanese Patent Publication No. 55-15383, which has both a natural falling part and a printed surface, and Fig. 6 is the second conventional example. This is one of the operation explanatory diagrams of the conventional apparatus disclosed in Japanese Patent Laid-Open No. 58-82948, and shows an example in which the printing surface is printed.

In the first conventional example shown in FIG. 5, ``A'' is a signature discharged from a rotary press and conveyed by a belt conveyor, and is dropped into a first space ``C''. The first space C is surrounded on four sides by diaphragms 2 and 2' provided on the left and right sides with respect to the intrusion direction of the notebook A, and also by a diaphragm E and a fixed plate H, The three diaphragms are interlocked, and each has a large number of air holes to blow out air while accumulating the notebooks.
Then, when one small bundle is accumulated, the temporary receiving plate is moved to the right by a latch and a pinion wheel, and the small bundle is dropped a certain distance downward.

That is, in this example, the paper is dropped twice and the bottom of the small bundle is rubbed once.

A of the second conventional example shown in FIG. 6 is a notebook that has already been stacked as one small bundle, the bottom of which is received by a paper receiving plate B, and is moved by a chain C in the direction of the arrow X. It is shown that the storage box D has already been moved slightly, and this storage box D has a wall divided into several parts in the vertical direction, and the paper receiving box B is vertically divided between the walls. I'm starting to be able to do it. For the items accumulated above the small bundles A, the storage box D is advanced in the direction of arrow The partition plate F is raised close to the plate F, and the partition plate F is moved back by the air cylinder G and transferred to the paper receiving box B.

That is, in this example, the bottom surface of the accumulated small bundle is printed twice, once each by the partition plate F and the paper receiving box B.

The present invention eliminates the unevenness of the signatures, creases, scratches, etc. caused by natural falling and the rubbing of the printing surface that are present in the prior art, and the printed signatures are stacked with the front, back, left, and right aligned. The purpose was to produce small bundles, and we thoroughly investigated the sorting device and the delivery area to ensure that there were no unreasonable issues.In particular, for delivery, we installed an upper signature holder and a lower signature holder. A space is provided above the upper document receiver in the document receiving operation by a sorting device so that the documents accumulated to a certain thickness can be smoothly discharged to the document receiver. The upper document receiver, which is not fork-shaped but can be moved up and down by passing through the mutual space, and also requires horizontal movement for evacuation, can be moved up and down into the upper conveyor. The left and right signature guides are installed so that they do not obstruct the movement of the two-way signature holder, and one of the two directions is swung to ensure accurate alignment. It is also contemplated that it is possible to use both the so-called drop-in and push-in stacking methods, in which the received signatures are dropped in small bundles and stacked by the lower signature receiver.

"Embodiments" The present invention will be described below based on embodiments of the drawings.

1 shown in FIG. 1 is a conveyor for signature printed matter extending from a rotary press (not shown), 2 and 2' are lower conveyors that transport signatures in synchronization with this, 3 is an upper conveyor, and a lower conveyor 2 , 2' are sandwiched from above and below at the portion overlapping with the upper conveyor 3, and are transferred to the upper surface 1 of the upper document receiver 11.
1'. The vertical gap between the upper conveyor 3 and the upper document receiver 11 can be adjusted as appropriate; in the case of drop-in stacking, a sufficient gap is provided, and in the case of push-in stacking, the gap is set close to the top. It is set so that

The lower conveyors 2, 2' and the upper conveyor 3 each have a plurality of belts stretched at appropriate intervals so that the signature receiver 11 passes through the gaps. Reference numerals 4 and 5 denote a weir cutting plate and a weir cutting stand which are arranged to correspond to the terminal positions of the belt conveyor 2 in order to temporarily stop the signatures.
and weir cutting table 5 are operated by air cylinders 6 and 7 connected to each other in the direction of approaching positions 4' and 5' shown by dashed lines, and the signature is sandwiched up to the upper part of the lower conveyor 2. and is forced to pause.

Reference numerals 8 and 9 are phototube emitters and receivers, and when a predetermined number of copies is reached based on the signal that the leading edge of the signature is blocked, the air cylinders 6 and 7 are activated by a signal from the rotary press, and the next time From then on, the signals are divided into a predetermined number of copies.

Reference numeral 10 denotes a space formed between the lower surface 3' of the upper conveyor 3 and a conveyor 68 for transferring small bundles, which will be described later, in which a predetermined number of signatures are accumulated. When it is lifted, it descends within this space at a controlled speed so as to keep the level of the top surface of the notebook almost constant. 12 is the lower document holder, 13
14 is a guide at the tip of the signature which is fixed to be substantially aligned with the belt surface 2'' which is the outlet of the signature on the lower conveyor 2'; 14 is a guide at the tip of the signature;
, the upper end 14' is swung to properly align the stacked documents in the front-back direction. The upper document receiver 11
FIG. 2 is a cross-sectional view taken along line A--A, assuming that it has descended to the position 11b indicated by the chain line. Both the upper signature receiver 11 and the lower signature receiver 12 are fork-shaped and inserted into the gap between them, and the guide bodies 13 and 14 are also arranged in appropriate spaces. In addition, 16 and 17 are guide plates that regulate the left and right sides of the collected notebooks,
The upper end of the other guide member 14 is swung by a motor in the same way as the guide member 14 shown in FIG. 1, so that the left and right sides of the stacked notebooks are aligned correctly.

While the upper document receiver 11 is lowered to the position 11b, when the upper surface 11' of the upper document receiver 11 becomes lower than the upper surface 12' of the lower document receiver 12,
The documents accumulated up to this time are placed in the lower document receiver 12.
will be delivered without any problem.

Then, when the upper document receiver 11 descends to the position 11b, it continues to retreat to the position 11c, then rises to the position 11d, and then advances to the position 11a and waits. Please note that the signature is placed in the lower signature holder 1.
Details of the movement from 11b to 11a after passing to 2 will be explained later.

On the other hand, the lower document receiver 12, which has received the document from the upper document receiver 11, continues to descend at a controlled speed so as to keep the level of the upper surface of the document almost constant, and when it reaches the position 12a, it reaches the position 12a. A signal is sent from the rotary press to the air cylinders 6 and 7 for weir cutting, and the feeding of the signature is temporarily stopped.

This temporary stop time is extremely short, but at this time, the lower document receiver 12 is switched to a rapid lowering mode and descends to the position 12b, and a little later, the upper document receiver 11 also returns to the standby position 11a. It is rapidly lowered from the position to the initial position protruding into the space shown by the solid line,
At the same time, the air cylinders 6 and 7 release the temporary stop of the signature and feed the next signature.

The lower signature receiver 12, which is rapidly switched to the position 12b and lowered, descends into the gap of the conveyor 68 provided below for conveying small bundles. The conveyor 68 is made up of a plurality of belts stretched with gaps between them, and is intermittently driven so that the lower document receiver 12 can be lowered into the gaps.

Then, when the lower signature receiver 12 is lowered to the position 12b and its upper surface 12' is slightly lower than the upper surface 68' of the belt of the conveyor 68, the small bundle of signatures is transferred to the conveyor 68 without any hindrance. At the same time as this transfer is completed, the conveyor 68 is driven to transfer it to the right, and when the rear end of the small bundle of signatures passes the tip of the lower signature receiver 12, the lower signature receiver 12 is quickly raised and returned to the old position. However, in the embodiment, when the lower document receiver 12 is lowered to the position 12b, it is subsequently retracted to the position 12c, and then
After raising it to the position 2d, it is moved forward and returned to the old position. In this way, the lowered small bundle of signatures can be used in another process at that position.

Next, the structure of the vertical and horizontal movement parts of the upper and lower document receivers 11 and 12 will be explained with reference to FIG.

21, 21' are hard shafts fixed to the frame 20, and two pairs of upper and lower slide blocks 22, 22', 23, 23' are loosely fitted onto these hard shafts 21, 21' so as to be movable up and down. One end of horizontal shafts 24, 24 is fixed to the upper pair of slide blocks 22, 22', and an angle member 25 is fixed to the other end.

A rack 28 is fixed to the piston rod 27 of an air cylinder 26 which is supported at its lower end by the frame 20 and can be stopped in the middle, and a pinion that meshes with the piston rod 27 is provided in a shaft box 29 fixed to the frame 20 (not shown). It is wedged onto the connecting shaft 30. The other end of the connecting shaft 30 is rotatably supported by a bracket 32 fixed to the frame 20, and the chain wheels 31, 31 are fixed to the main parts of the connecting shaft 30, the upper parts of the rigid shafts 21, 21', In addition, the ends of the roller chains 35, 35, which are hung on the intermediate chain wheels 33, 33', 33, 33' provided at intermediate points and the chain wheels 34, 34 for tension tensioning, are connected to the slide block 2.
When the air cylinder 26 operates in the direction of extending the piston rod 27, the slide blocks 22, 22' and the Fixed horizontal shafts 24, 24, angle member 2
The 5th class rises in one piece, and on the other hand, when the piston rod 27 is retracted, the slide blocks 22, 2
2' etc. descend.

37, 37' shown in FIG. 2 are the horizontal shafts 24,
The slide block 24 is loosely fitted into the slide block 24 and moves horizontally.As shown in FIGS. are connected by a piston 40, with chain wheels 43, 43' rotatably provided at both ends of a sliding body 42 fixed to the piston rod 39, a chain wheel 44 loosely fitted on the pin 40, and an angle member 25. A roller chain 47 is connected to a chain wheel 46 wedged on a connecting shaft 45 provided on the top surface.
47' as shown in the figure.Roller chain 47,
One end of 47' is connected to a connecting piece 48 fixed to the slide block 37, and the other end is connected to an adjusting screw 49,
Connect to 49' and apply appropriate tension.

Further, a chain wheel 46' is wedge-attached to the other end of the connecting shaft 45 as shown in FIGS. 3 and 4, and this chain wheel 46' and a roller chain 50 provided on the slide block 22' are connected to each other. Both ends are connected to connecting pieces 48' fixed to the slide block 37'.

As shown in FIGS. 2 and 4, the upper document receiver 11 is fixed to a U-shaped frame member 51 fixed to the lower surface of the slide blocks 37, 37'. and become one. In FIG. 4, when the air cylinder 38 operates in the direction of extending the piston rod 39,
The sliding body 42 is moved to the right, and the roller chain 47' hooked on the chain wheel 43' pulls the slide block 37 to the left. Then, when the slide block 37 moves to the left, the roller chain 47
Turn the chain wheel 46 and the connecting shaft 45 clockwise. When the chain wheel 46' in FIG. 3 is rotated clockwise by the connecting shaft 45, the roller chain 50 is moved to the slide block 37'.
Move to the left.

That is, the slide blocks 37, 37' are moved parallel to the left, and the upper document receiver 11 is moved to the space 10.
moved inward.

When the air cylinder 38 operates in the direction of tightening the piston rod 39, the sliding body 42 is moved to the left, and the roller chain 47 hooked on the chain wheel 43 is moved to the left.
pulls the slide block 37 to the right and at the same time turns the chain wheel 46 and the connecting shaft 45 counterclockwise. This result, contrary to the above, shows that the slide block 37,
37 is moved parallel to the right and the upper signature receiver 1
1 evacuates from inside the space 10. With this configuration, the stroke of the piston rod 39 can be reduced to half of the horizontal movement distance of the upper document receiver 11, contributing to miniaturization.

The vertical and horizontal movements of the lower document receiver 12 are almost the same as those described above, and the air cylinder 52 shown in FIG. 54 is driven, and the chain wheel 5 is wedged near both ends of the chain wheel 5.
Roller chain 56,5 hung on 5,55
6, the slide blocks 23, 23' are moved up and down in parallel.

One end of the horizontal shafts 57, 57 is fixed to the slide blocks 23, 23', and a cross beam 58 is also fixed to the slide block 23, 23'. As shown in FIGS. 3 and 4, an air cylinder 61 and a sliding body 63 fixed to its piston rod 62 are provided between the air cylinder 61 and a rotatable chain wheel 64 provided on both sides of the sliding body 63. , 64', one end of the roller chain 65, 65' is connected to the horizontal shaft 57, 57.
The air cylinder 61 is connected to a frame member 66 fixed to slide blocks 60, 60 which are loosely fitted into the piston rod, and the other end is connected to adjustment screws 67, 67' attached to the cross beam 58 and the angle member 59. When operated in the stretching direction, the lower signature receiver 12 fixed to the frame member 66 is moved to the left and moved toward the interior of the space 10.

Further, numeral 69 shown in FIG. 3 is a proximity switch fixed to the slide block 23, which is provided so as to face the inner surface of the slide block 22 with a slight gap, and is connected to the upper document holder described above. 1
1 is lowered while keeping the level of the top surface of the signature sent in almost constant, and when it is finally delivered to the lower signature receiver 12, that is, the upper surface 11' of the upper signature receiver 11 is lowered to the upper surface 12' of the lower signature receiver 12. This signal is used to move the upper document receiver 11 from the position 11b to 11c, 11d, 1
While rapidly moving vertically and horizontally to the position 1a, the lower document receiver 12 starts to descend while keeping the level of the upper surface of the received document substantially constant.

As explained above, both the upper document receiver 11 and the lower document receiver 12 are moved up and down by air cylinders 26 and 51 that can be stopped in the middle.
A timer (not shown) is used to lower the level of the upper surfaces of the signatures received by the signature receivers 11 and 12 at a substantially constant level, and the timing can be adjusted.

The signatures sent out between the lower conveyor 2' and the upper conveyor 3 are accumulated when their rear ends reach the belt surface 2'' at the signature exit. When the 12 descends, a drop-in stacking method is used in which a small gap is maintained between the top surface of the documents being stacked and the bottom surface 3' of the extended belt of the upper conveyor 3. This is called "push stacking", which refers to the case where the signature is pushed by the lower surface 3' of the belt without the above-mentioned gap, and is fed while applying an appropriate pressure to press the folds and make the thickness of the signature uniform. It is called a method.

Therefore, the difference in thickness of the accumulated notebooks is smaller when using the push-in method than when using the drop-in method.
Although it requires less manpower to complete the bookbinding process after the collection, it is inevitable that some of the notebooks are thin and bend easily.

As explained above, in the apparatus of the present invention, depending on the timing set in the timer, the space 10 formed between the lower surface 3' of the upper conveyor 3 and the small bundle transfer conveyor 68 is controlled. The gap between the lower surface 3' of the upper conveyor 3 and the upper surface 11' of the upper document receiver 11 is created by the vertical movement of a slide block 22 fixed to an air cylinder 26 that can be stopped midway in the vertical direction. The upper conveyor 3 is moved close to the lower surface 3' to narrow the gap width, and the vertical movement of the slide blocks 22 and 23 widens the gap width to the lower surface 3' of the upper conveyor 3. A frame member 51 fixed to the lower surface of the slide block 37
A fork-shaped upper document receiver 11 is fixed to the slide block 37 so that it can move freely in the horizontal direction. The predetermined gap can be adjusted from 10 to 25 mm.

Further, the upper signature receiver 11 and the lower signature receiver 12 are fixed to a slide block 23 that is movable in the vertical direction by an air cylinder 52 that can stop the small bundle transferred from the upper signature receiver 11 in the middle. A fork-shaped lower signature receiver 12 is fixed to a frame member 66 fixed to a slide block 60 which is loosely fitted onto the horizontal shaft 57, and is movable in the horizontal direction integrally with the slide block 60. It is possible to use both the drop-in accumulation method and the push-in accumulation method.

"Action of invention" Next, the operation of the present invention will be explained.

First of all, the standard is the case of a drop-in accumulation method in which there is a sufficient gap equal to or more than the thickness of the signatures dammed in the previous stage between the upper belts 3, 3' and the upper signature receiver 11 surface. To explain this as follows, in Fig. 1, when the tip of the ejected document from the rotary press blocks light from the phototubes 8 and 9, this signal is sent to the counter of the rotary press and the control box of this device (both not shown).
is transmitted to.

The signatures continue to be advanced, but the counter (not shown) of the rotary press starts counting the signatures for one small bundle set in advance based on this signal, and the control box (not shown) starts counting the signatures for one small bundle set in advance. A preset timer starts operating based on the signal. In response to the signal from this timer, the upper document receiver 11, which was waiting at the standby position 11a, moves to the document receiving start position shown by the solid line so that there is a gap larger than the total thickness of the collected document collection. Air cylinder 2
It is rapidly lowered by the operation of step 6, and after it stops, the distance it descends each time it starts is controlled by the throttle of the solenoid valve at the start interval of the timer set according to the thickness of the folded envelope. The upper surface of the notebook is then lowered while keeping the level of the top surface almost constant.

Thereby, the group of dammed-up signatures can be collected and discharged by falling onto the upper signature receiver 11 without being pressed by the upper belt.

In addition, in the case of the push-in method, the upper signature holder 11
The starting position of the signatures is slightly higher than the position described above, and the descending speed of the upper and lower double signature receivers is also adjusted so that the upper surface of the signatures that are being accumulated and the extension of the upper conveyor 3 are adjusted as described above. A timer is set in advance and activated so that the pressure between the lower surface 3' of the belt and the lower surface 3' of the belt lowered is kept almost constant.

Then, confirm that the upper surface 11' of the upper signature receiver 11 is aligned with the upper surface 12' of the lower signature receiver 12.
When the proximity sensor 69 shown in the figure detects the signal, the upper document receiver 11 is rapidly switched from the position 11b to the standby position 11a via 11c and 11d under the control of a separately provided timer (not shown). By operating the air cylinders 26 and 38, the vertical movement and horizontal movement are continuously performed and the air cylinders 26 and 38 are operated.

On the other hand, when the proximity sensor 69 sends a signal, the lower document receiver 12 receives the document from the upper document receiver 11.
is controlled by a timer in the same way as the upper signature receiver 11, and descends while keeping the level of the upper surface of the signature almost constant. The oscillation allows for accurate alignment.

Next, in the case of the push-in method, the stacked documents are fed under pressure, so there is no need for this alignment, and therefore, the drive of the motor 15 is stopped. Then, when the lower document receiver 12 descends to the position 12a shown by the dashed line, a signal for discharging one small bundle is transmitted from the counter (not shown) of the rotary press to the control box, and at the same time, the air The cylinders 6 and 7 are operated, and the weir cutting plate 4 and the weir cutting table 5 are lowered and raised to dam the signature above the lower conveyor 2 and temporarily stop it.

In addition, a signal from a timer is sent at a predetermined timing based on the signal for discharging one small bundle, and the lower document receiver 12, which receives the small bundle of documents, is activated by the air cylinder 51 which is rapidly switched. 12b, and at a timing slightly delayed from the start of this descent, the upper document receiver 11 is rapidly lowered from its standby position 12d to the document receiving start position indicated by the solid line, and at the same time, the air cylinder 6 and 7 return the weir cutting board 4 and the weir cutting stand 5, and the temporarily stopped folding book moves forward again.
It is fed onto the lower document receiver 11. The lower document receiver 12 that has been lowered to the position 12b continues to be
c and 12d, it returns to its old position, but if the small bundle of signatures is moved to the right by the conveyor 68 as described above, the lower signature receiver 12 will not be retracted horizontally but will be raised to its old position. You can also do it like this.

In this embodiment, an air cylinder with an intermediate stop was used to move the upper and lower bifold book holder up and down, but the invention is not limited to this, and a variable up and down movement drive device may also be used. Of course.

"Effect of the invention" Next, the effects of the present invention will be explained.

As described above, the present invention comprises a transfer device consisting of an upper conveyor 3 and lower conveyors 2, 2' for transferring printed materials almost horizontally in synchronization with a rotary press, and a sorting device provided near the tip of the lower conveyor. , guide bodies 13 and 14 whose main parts are fork-shaped, which are installed directly below and in front of the signature exit at the tip of the lower conveyor, and on both left and right sides; and a space 10 of the guide body provided in front of the signature exit. A fork-shaped upper signature holder 11 that is inserted into and movable in the horizontal and vertical directions.
A fork-shaped lower signature receiver 12 is provided which is movable at least in the vertical direction by being inserted into the space 10 between the guide body and the upper signature receiver directly below the signature exit, and the upper conveyor 3 is provided with a plurality of endless belts. is extended into the space 10 of the upper signature receiver 11, and the upper signature receiver 1
1 passes through the lower document receiver 12 and the space 10 of the upper conveyor 3 and moves up and down while adjusting the timing, and at least the guide body provided in front of the document exit and the guide bodies provided on the left and right sides. An alignment device that allows one side to swing as necessary is provided, and
In the space 10 formed between the lower surface of the upper conveyor and the small bundle transfer conveyor 68, the gap between the lower surface of the upper conveyor and the upper surface of the upper signature receiver allows for an intermediate stop in the vertical direction. Slide blocks 22, 23 fixed to an air cylinder 26
The vertical movement of the slide block approaches the lower surface of the upper conveyor to narrow the gap width, and the vertical movement of the slide block widens the gap width with the lower surface of the upper conveyor. The frame material 5 fixed to the lower surface of the slide block 37
A fork-shaped upper document receiver 11 is fixed to 1 and can be moved in the horizontal direction integrally with the slide block 37. By moving this upper document receiver, the upper document receiver 11 can be moved close to or away from the lower surface of the upper conveyor. The structure is such that a predetermined gap can be adjusted, and both a drop-in stacking method and a push-in stacking method are possible.

Therefore, the documents stacked by the document transfer device, the sorting device, the upper document receiver, and the left and right guide bodies before and after the document exit in this device may naturally fall and the printed surface may be damaged during the stacking process. By eliminating all rough printing, etc., there are no irregularities, folds, scratches, etc., and the guide body in front of the signature exit and either the left or right guide body slide to create the signature. By aligning them, it is possible to obtain a small bundle of folded printed materials that are accurately aligned and stacked.

Furthermore, the timing and speed of stacking and lowering the folding papers in the upper and lower folding folding receivers are variable, so that both dropping and pushing stacking methods can be used together.
In particular, even if the thickness of the collection of dams is increased,
It is possible to smoothly collect and discharge documents onto the upper document receiver without being pressed by the upper belt, and the range of documents to be accumulated is expanded, which is of great benefit to this type of industry.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of an embodiment according to the present invention, and FIG.
The figure is a cross-sectional view taken along the line A-A in Figure 1, Figure 3 is a perspective view of the main parts to explain the vertical and horizontal movements of the upper and lower double-folding notebook holders, and Figure 4 is the horizontal movement of the upper and lower notebook holders. FIGS. 5 and 6 are explanatory views of the main parts of the conventional device. 2, 2'...Lower conveyor, 3...Upper conveyor, 10...Space, 11...Upper signature receiver, 1
2... Lower signature holder, 13, 14... Guide body.

Claims (1)

[Claims] 1. A transfer device consisting of an upper conveyor and a lower conveyor that transport the printed signatures almost horizontally in synchronization with the rotary press, a sorting device installed near the tip of the lower conveyor, and a section directly below the signature exit at the tip of the lower conveyor. A guide body whose principal part is fork-shaped stands upright in front and on both left and right sides, and a fork-shaped guide body which is inserted into the space of the guide body provided in front of the e-book exit and is movable in horizontal and vertical directions. The upper part of the signature holder,
A fork-shaped lower signature receiver is provided that is movable at least in the vertical direction by being inserted into the space between the guide body and the upper signature receiver directly below the signature exit, and the upper conveyor carries the plurality of endless bands into the upper signature receiver. The upper signature receiver is moved up and down while adjusting the timing by passing through the space between the lower signature receiver and the upper conveyor, and a guide provided at least in front of the signature exit. An aligning device is provided in which one of the guide bodies provided on the left and right sides of the body can be swung as necessary, and an aligning device is provided in the space formed between the lower surface of the upper conveyor and the small bundle transfer conveyor 68. The gap between the lower surface of the upper conveyor and the upper surface of the upper document receiver is created by a slide block 2 fixed to an air cylinder 26 that can be stopped midway in the vertical direction.
The horizontal shaft 24 fixed to the slide block 22 approaches the lower surface of the upper conveyor by vertical movement of 2 and 23 to narrow the gap width, and the vertical movement of the slide block widens the gap width with the lower surface of the upper conveyor.
A fork-shaped upper signature receiver 11 is attached to the frame member 51 fixed to the lower surface of the slide block 37 which is loosely fitted into the slide block 37.
is fixed and can be moved in the horizontal direction integrally with the slide block 37, and by moving this upper document holder, it is possible to adjust a predetermined gap from close to the bottom surface of the upper conveyor to away from it. A small bundle stacking device for printed materials, characterized in that it is configured to be capable of both stacking methods: a push-in method and a push-in method.