JPH0543108A - Paper sheer feeder in vertical paper collator - Google Patents

Abstract

PURPOSE:To provide a paper sheet feeder capable of transferring already collated paper sheets discharged successively from a paper counter accurately onto a paper sheet receiving table without folding them up or bending them back. CONSTITUTION:A paper feed unit 3 is constituted of plural number of strip shape feed belts 11 and 12, and the feed belts 11 and 12 are driven by means of an electric motor 22 formed in one united body with a speed reducer and a clutch mechanism. The clutch mechanism is set to be thrown in only when a paper sheet detecting sensor 26 detects a paper sheet (p) passing between a paper discharge unit 4 of a paper collator and a paper receiving edge of a paper sheet feed unit 3. A paper sheet receiving table 27 having a paper sheet stopper 28 in the tail end is arranged under the paper discharge edge of the paper sheet feed unit 3, and an air nozzle 30 is also arranged toward the paper sheet feed edge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical collating machine, that is, a sheet of each page to be collated is placed on a paper table vertically arranged at a plurality of stages at regular intervals, Papers are intermittently taken out simultaneously at a fixed timing, and the upper papers are sequentially sent out downward on the lower papers with a delay between the paper trays of the respective stages. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device in a vertical collating machine that feeds collated sheets to a predetermined sheet receiving tray so as to sequentially stack the sheets.

[0002]

2. Description of the Related Art A conventional sheet feeding device is a sheet feeding device connected to a sheet discharging portion of a collator, and a drive for continuously driving a carrier side of a conveyor belt of the sheet feeding device to a sheet receiving side described later. And a paper tray having a receiving end located below a paper discharge end of the paper feeding device,
It is composed of a paper receiving tray having a paper stopper at its end, and air blowing means for blowing air between the paper sequentially fed to the paper receiving tray and the paper immediately below it.

[0003]

In the vertical collating machine as described above, there is an interval between each part such as the first part and the second part which are sequentially collated, that is, the collation is performed first. When the last sheet of the first sheet of paper to be ejected is ejected without overlapping the top sheet of the second set of sheets that are subsequently collated and ejected, Therefore, there is an interval between the sheets of each part such as the first copy and the second copy that are sequentially ejected, and the sheet feeding device that receives this leaves the same as it is, that is, leaves an interval between the sheets of each part. The paper is sent to the paper tray at the same speed as the paper discharge speed. In the paper tray, however, there is a space in time and space between the fed first sheet and the second sheet, so the last sheet of the already fed sheet (uppermost sheet) Listed in)
The rear part may be floated by the air blowing means and rolled up, and as a result, the second sheet of paper that is subsequently fed may slip underneath it, or the sheets may overlap when folded. In addition, a paper feeding error often occurs due to this. In addition, as the speed of the collator increases, the feed speed of the paper feeder also increases, resulting in faster paper ejection from the paper ejection edge, causing the paper stopper to collide with the paper stopper on the paper tray and bend. Problems such as being lost have also occurred. The present invention aims to solve the above problems.

[0004]

The gist of the structure of the present invention is a paper detection sensor arranged in the vicinity of the paper discharge section of a collator, which is discharged from the paper discharge section. A paper detection sensor that detects the presence or absence of collated paper that moves toward the receiving end, a paper feed unit that has its receiving end positioned with a head below the paper ejection unit of the collating machine, and the above paper feed Drive means for driving the unit to move at a low speed such that the paper discharged to the paper receiving tray described later will not be deformed even if the paper strikes the paper stopper of the paper receiving tray. , Drive means for driving to move to the sheet receiving tray side, which will be described later, only while detecting the presence of the sheet discharged from the sheet discharging section of the collator and moving toward the receiving end of the sheet feeding section; The receiving end is located below the discharge end. And a sheet receiving table having a sheet stopper at its end, and an air blowing unit for blowing air between the sheets sequentially discharged on the sheet receiving table and the sheet immediately below the sheet receiving table. It is a paper feeding device in the vertical collating machine configured by.

The sheet detecting sensor may be any sensor having such a function as long as it can detect whether or not the collated sheet is discharged from the discharging section. For example, a reflection type sensor that combines a light emitting element and a light receiving element is adopted, and the sensor is arranged upward or downward toward the position where the paper passes, and the reflected light of the light emitted from the light emitting element is reflected by the light receiving element. For example, the presence or absence of a sheet passing through the above position is determined depending on whether or not light is received. The drop provided between the paper discharge section of the collator and the paper receiving end of the paper feed section is
The paper ejected from the paper ejection unit, especially the first paper of the next partial paper ejected at a slight interval, such as the first and second copies, has already been placed on the paper feed unit and is on standby. Do not get under or get caught under the last sheet of paper,
This is to ensure that it is placed on top of it. Specifically, about 20 mm is suitable.

The paper feeding section may employ various structures as long as the paper can be received from the collator and transferred to the paper tray. Specifically, it may be configured by at least a conveyor belt hung between belt wheels arranged at the receiving end and the discharging end, and a plurality of pressing rollers elastically abutted to the carrier side. it can. In addition, it is preferable that an air suction means for sucking air to prevent the floating of the sheet placed thereon is arranged below the receiving end of the sheet feeding section. Further, various means can be freely adopted as the drive means of the paper feeding section, but a construction having an electric motor as a main element is suitable. When the paper feed unit is configured with the conveyor belt and the pressing roller as main elements, the belt wheel is configured to be connected to the electric motor via a clutch mechanism and a speed reducer, and a driving force is generated by the clutch mechanism. It is suitable to be configured to transmit or cut. As described above, connection / disconnection of the clutch mechanism is controlled by the detection result of the sheet of the sheet detection sensor. That is, when the sheet is detected, the clutch mechanism is set in the connected state, and when the sheet is not detected, the clutch mechanism is set in the separated state.

The air blowing means does not bend or bend the sheet discharged onto the sheet receiving tray until it slides on the uppermost sheet already placed and its tip comes into contact with the sheet stopper. It is intended to ensure smooth movement.

[0008]

Since the present invention is constructed as described above,
It is used as follows. First, in the vertical collating machine, the different sheets placed on the paper trays are simultaneously taken out one by one from a plurality of paper trays, and the upper papers are sequentially taken out from the lower paper trays. The sheets taken out from the table are transferred to the lower sheet ejection section in a state where they are piled up with a delay in the interval between each sheet table,
These papers are sent out from the paper output unit to the paper feeding device. Further, in the collator, such an operation is intermittently performed, and as a result, the number of sheets of paper (a part of the sheets of paper) piled up at a delay in the interval between the respective paper trays is intermittently sent out. It will come.

In the paper feeding device, a paper detection sensor arranged in the vicinity of the discharge portion of the collating machine detects whether or not there is a collated paper which passes toward the receiving end. The drive means operates to feed the paper to the paper feed unit, receives a predetermined number of papers (paper corresponding to a part) continuously fed as described above at the receiving end, and the paper tray As described above, it is transferred to the side at a speed lower than the speed at which it was received. However, the sheet received at this time is transported to the upper sheet succeeding the lower sheet preceding the sheet at the receiving end while reducing the delay interval between the sheets. As described above, the collating machine collates intermittently for each part of the sheet, so when the above part is fed to the sheet feeding part of the feeding device, it may be slightly separated until the next part. There will be a gap between time and space. As a result, there is no collated sheet that moves from the discharge section toward the receiving end, and the sheet detection sensor naturally does not detect the presence of the sheet, and a drive that causes the sheet feed section to perform a feeding operation. The operation of the means will be stopped.

In this way, the paper feeding unit stops the feeding operation, naturally, the collated paper which has been fed is stopped on the spot, and the last sheet is stopped at the receiving end. Become. When the air suction means is arranged below the receiving end, the rear end side of the rearmost sheet is sucked downward to prevent the sheet from curling upward (even while the sheet is moving, Needless to say, each sheet is in a state of being sucked downward by the air suction means when passing through the receiving end). As described above, the collating machine collates intermittently for each part, so when the time interval elapses, the next part is collated, and as described above, the lower part is sequentially arranged. The papers taken out from the upper paper trays are superposed on the papers taken out from the paper trays at a delay of the interval between the paper trays and sent out from the paper discharge unit to the paper feeding device. Then, the detection sensor detects the presence of the collated sheet moving toward the receiving end, as described above, and thereby the driving unit operates to cause the sheet feeding unit to perform a feeding operation,
The next part of the sheet sent as described above is received at the sheet receiving end, and the transfer is started at a speed lower than the speed at which the sheet is received toward the sheet pedestal side. Then, in the paper feeding section, for some papers that it received earlier,
Stop the feeding operation and wait until the next part of the paper is received, and when the first part of the next part of the paper overlaps the last part of the last part of the paper, By starting the operation, some of the sheets that are intermittently collated and delivered from the paper ejection unit are delivered to the paper pedestal in a state of overlapping, eliminating the temporal and spatial intervals. I will. As described above, when stacking the next partial top sheet on the partial top sheet, if the air suction means is arranged as described above, Since a part of the last sheet of paper cannot be rolled up, an error does not occur in the above-mentioned overlap. Further, it is also effective to provide a drop in the paper discharge portion and arrange the receiving end downward.

Further, as mentioned above, each of the above-mentioned some sheets of paper is
Since the rear paper is sequentially overlapped with the front paper, the rear end of the preceding paper is required by the air blowing means when the paper is fed by the paper feeding section and sequentially received from the paper discharge end at the end thereof to the paper receiving tray. Since the sheet is not floated as described above, there is no inconvenience in placing the succeeding sheet on the upper surface of the preceding sheet. In short, it is possible to prevent the following paper from slipping under the preceding paper, and the following paper from overlapping while folding the preceding paper. Furthermore, as described above, each sheet is sent by the sheet feeding unit at an appropriate speed slower than the speed at which the sheet is ejected from the collating machine, and is sent to the sheet receiving table. It can be considered that there is no fear of bending even if the tip of the is collided. In this way, in the paper feeding device in this collator,
The intended purpose can be achieved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the sheet feeding device 2 is installed adjacent to the vertical collator 1. The sheet feeding unit 3 of the sheet feeding device 2 is positioned below the sheet discharging unit 4 of the collating machine 1 by a gap of about 20 mm so that the sheet receiving end of the sheet feeding unit 3 is positioned below the sheet discharging unit 4. The direction is to extend in the paper discharge direction. The sheet discharge unit 4 of the collating machine 1 is mainly fed vertically downward between the plural collating belts 5, 5 ... And the guide plates 6, 6 facing each other by the former action. It is composed of a plurality of parallel sheet discharge belts 7, 7 for sending p, p ... In the horizontal direction. The gathering belts 5 and 5 and the discharge belts 7 and 7 are endless belts, respectively. The former is looped over the upper and lower belt wheels 8 and 8 and the latter is looped over the belt wheels 9 and 9 at both ends. It is handed over, and the tension wheels 10, 10 ... A slide plate is arranged between the plurality of discharge belts 7, 7.

The paper feed unit 3 has a plurality of feed belts 11, 11 ... Arranged in parallel in the first half thereof, a plurality of feed belts 12, 12 ... Arranged in the latter half thereof, and both feed belts 11, 1.
1 ..., 12 and 12 ... are arranged at both ends and hung on them (the feed belts 11 and 12 are endless belts)
.. and tension wheels 14, 14 arranged on the return side thereof, and the respective feed belts 11, 11.
, 12, 12 ... A plurality of pressing rollers 15, 15 ..., 16, 16 ...
7 and 17, and the feed belts 11, 11 ..., 12 and 12
Guide plates 18, 18 to be brought into contact with the lower surface of the carrier side of
It is basically composed of and. Feeding belt 1
.. on the rear end side of 1, 11, ... And on the front end side of the feed belts 12, 12, ... are coaxially configured, and their shafts are used as drive shafts, and chain wheels 19 are fixedly mounted on the shafts. The chain wheel 19 and the chain wheel 2 below the feed belts 11, 11, ..., 12, 12 ...
Chain 21 is hung between 0 and. Below that, a reduction gear is connected to its output shaft, the output shaft of the reduction gear is further connected to a clutch mechanism, and an electric motor 22 integrally formed with the reduction gear and the clutch mechanism is arranged. A chain 24 is stretched between a chain wheel 23 arranged on the output side shaft of the mechanism and another chain wheel coaxially arranged on the chain wheel 20.
The reduction ratio of the speed reducer connected to the electric motor 22 is
The feed belt 1 is driven by the rotational driving force transmitted through the chain wheels 23, 20, 19 and the chains 24, 21 and the like.
The feed speeds of the papers p, p ... Due to 1, 11, ..., 12, 12 ... When the papers p, p ... Are fed to the paper receiving tray 27, the tips thereof collide with the paper stopper 28, which will be described later. In this case, the distance should be set so that the movement can be stopped without bending.

An air suction device 25, which opens upward, is arranged below the receiving end of the paper feeding unit 3. Further, a paper detection sensor 26 is arranged below the receiving end between the paper ejecting unit 4 of the collator 1 and the receiving end of the paper feeding unit 3. The paper detection sensor 26 is a reflection type sensor in which a light emitting element and a light receiving element are combined, and is arranged with its upper side facing, and the papers p, p ... Which pass from the paper ejecting section 4 toward the paper feeding section 3.
The presence or absence of is determined by whether or not the reflected light of the light emitted by the light emitting element is received by the light receiving element. Then, the clutch mechanism connected to the output shaft of the electric motor 22 via a speed reducer is controlled by the output of the paper detection sensor 26. That is, when the light receiving element of the paper detection sensor 26 receives the reflected light, the paper p is passing from the paper discharge unit 4 toward the paper feed unit 3, so the clutch mechanism is brought into the contact state, and the paper feed unit 3 is brought into contact. Feed belts 11, 11, ...
The rotational driving force of the electric motor 22 is transmitted to 12, 12, ... Through the speed reducer, the clutch mechanism, the chain wheels 23, 20, 19 and the chains 24, 21. If the light receiving element of the paper detection sensor 26 does not receive the reflected light, the paper p is not fed from the paper ejection unit 4 to the paper feeding unit 3, so the clutch mechanism is set to the disengaged state, and the paper feeding unit 3 is fed. It is controlled so that the rotational driving force of the electric motor 22 is not transmitted to the belts 11, 11 ,.

A paper receiving stand 27 is arranged below the paper discharge end of the paper feeding section 3. A paper stopper 28 is movably and fixedly arranged at the end of the paper tray 27. That is, as shown in FIG. 1, the paper stopper 28 has a laterally inverted L-shape, and the lateral plate portion at the lower end thereof is provided with the bolt hole and the long hole formed in the paper tray 27. Bolts and nuts 29, 29
Insert through and tighten. An air nozzle 3 having a rearward opening is provided slightly below the discharge end of the paper feed unit 3.
0 is set. Air is blown between the paper p that is sequentially fed to the paper receiving tray 27 from the discharge end at the end of the paper feeding unit 3 and the paper p that is already placed immediately below it, or the surface of the paper receiving tray 27 or above it. The purpose is to allow the paper p sent out from the paper feeding unit 3 to slide smoothly on the paper p already placed on the paper p while being positioned by the paper stopper 28.

In this embodiment, since it is constructed as described above, it is used as follows. First, in the vertical collator 1, a plurality of paper trays (not shown) are used to transfer different sheets p (the sheets p, p ... Papers p taken out one by one at the same time and taken out sequentially from the lower paper tray by the collating belts 5, 5, ....
Then, the sheets p taken out from the upper paper tray are transferred to the lower paper discharge section 4 in a state where they are piled up with a delay between the respective paper trays.
In the lower paper ejection section 4, the papers p, p ...
The paper is fed to the receiving end of the paper feeding unit 3 of the paper feeding device 2. In the collating machine 1, such an operation is intermittently performed, and as a result, the number of sheets of paper p, p, ... ,
p ...) will be intermittently sent out part by part.

In the paper feeding device 3, the paper detecting sensor 26 detects the presence or absence of the collated paper p moving toward the receiving end. As shown in FIG. 2, when the light emitting element is always made to emit light and the sheets p, p ...
That is, when the collated sheets p, p ... Are ejected from the sheet ejecting unit 4 of the collating machine 1 and are fed to the receiving end of the sheet feeding unit 3, the fed sheets p, p ... The lower surface of the sheet is irradiated with the light of the light emitting element, and the reflected light from the light is emitted from the paper detection sensor 26.
The light is received by the light receiving element and the passage of the paper p, p ... Is detected. In this way, when the passage of the paper p, p ... Is detected,
Output of a detection signal from the paper detection sensor 26 controls the clutch mechanism to be in a contact state, and the rotational driving force of the electric motor 22 causes the reduction gear, the clutch mechanism, the chain wheel 23, the chain 24, and the chain. Car 20, chain 21
2 is transmitted to the belt pulley 13 through the chain wheel 19 and is fed to the feed belts 11, 11, ..., 12, 12 ...
As shown in b, the feeding operation is performed.

The sheets p, p, ... Collected by the collating machine 1 and sent out from the sheet discharging section 4 are received by the sheet feeding unit 3 at the receiving end of the sheet feeding section 3, and the feeding belt 11, The paper is sent to the paper receiving tray 27 by 11, ..., 12, 12. By the way, as described above, since the sheets p, p ... Are intermittently sent for each of the sheets corresponding to a part thereof, when a portion of the sheets is discharged from the sheet discharge unit 4, a certain time is required. Since there is a spatial / spatial interval, as shown in FIG. 3, the sheets p, p ... Are no longer present between the paper discharge unit 4 and the receiving end. Naturally, in the paper detection sensor 26, since the reflected light from the paper p, p ... disappears, the output of the detection signal is stopped, the clutch mechanism is immediately controlled to be in the disengaged state, and the paper feeding unit 3 feeds the paper. Belts 11 and 11
.., 12, 12, ... are stopped. The feed belts 11, 11, ..., 12, 12 ...
It will stop with the last one of p ... Mounted on the receiving end. In this way, it waits for the next part of the sheets p, p ... At this time, as described above, since the air suction device 25 that opens upward is arranged at the lower part of the receiving end, the paper p above it, that is, the rearmost paper p is sucked downward. And the feed belt 11,
11 is kept in contact with (not in a floating state).

After a certain period of time in which the sheets p, p ... Are not ejected from the sheet ejection section 4 as a result of the intermittent collating operation of the collator 1, the collated sheets p, p. The paper is ejected from the paper ejection unit 4 and is ejected toward the receiving end of the paper feeding unit 3. Then, as shown in FIG. 4, the sheet detection sensor 26 detects it, and the detection signal controls the clutch mechanism to be in the contact state, so that the rotational driving force of the electric motor 22 is fed to the feed belt 11. , 11 ..., 12, 12, ..., and the feed operation is performed as indicated by arrows c and d in FIG.
However, at this time, the leading paper p discharged from the paper discharge unit 4
On the paper p that is already on the receiving end of the paper feeding unit 3,
The front end portion is slightly left and overlaps on it. At that time, as described above, the clutch mechanism is brought into the contact state, and the feed belts 11, 11, ..., 12, 12 ... The paper p, p ... Is sent to the paper receiving tray 27. Note that, as described above, at the receiving end of the paper feeding unit 3, since the rearmost paper p that is placed is sucked downward by the air suction device 25, the rear end of the paper p does not float and continues. The paper p ejected from the paper ejecting section 4 can be smoothly placed on it. Of course,
The fact that the receiving end is lower than the paper discharge unit 4 is also useful for that. Thus, while the paper p is being discharged from the paper discharge unit 4, the paper detection sensor 26 detects it and brings the clutch mechanism into the contact state, so that the feed belts 11, 11, ... 12, 12 ... Are being fed, and when the paper is not discharged from the paper discharge unit 4 and the paper detection sensor 26 detects this, the clutch mechanism is disengaged and the feed belts 11, 11 ... , 12 ... are stopped.

In this way, in the sheet feeding section 3, the collating machine 1 in the preceding stage is intermittently operated to collect each of the collated sheets p,
p ... Eliminates the space between time and space,
The sheets p, p ... Of a part of each sheet are sequentially and continuously fed at a low speed as described above. Moreover, in the paper feeding unit 3, as described above, the paper is fed at a speed lower than the speed at which the paper is ejected from the paper ejecting unit 4, so that the delay interval between the papers p, p ... Three
It is to be reduced when received by.

Further, each of the sheets p, p ... Is successively delivered from the sheet ejecting section 4 to the sheet feeding section 3 as described above, and when it is fed in the end direction thereof, the sheet is ejected from the end sheet ejecting end. It is sent onto the paper tray 27. Paper p that continues at this time,
In the case of p ..., the paper p that follows the preceding paper p is fed in an overlapping state with a part of the front end left. By the way, when the sheets p, p ... Are placed on the sheet receiving tray 27 or the uppermost sheet p placed on the sheet receiving tray 27, the sheet p to be placed and the sheet receiving tray 27 or the already placed uppermost sheet p. It is extremely useful to blow air between the paper p and the paper p by the air nozzle 30, but the paper p, p, ... In the case where the gathered portions have a space in terms of time and space, the last sheet of paper p among the sheets of paper p, p ...
The rear part of the sheet floats, and the leading edge sheet p of some of the succeeding sheets of paper p, p ... Is to be inserted underneath, or the floating sheet of paper p is bent and overlapped, which causes a problem. .. However, here, as described above, the sheets p, p, ...
The following papers p are continuous without any gap in the overlapping state, and the air from the air nozzle 30 can perform only the useful action without the above problems.
The sheets p, p ... Can be sequentially and smoothly placed on the sheet tray 27. Further, the speed at which the paper feeding section 3 feeds the paper p, p ... As described above, the papers p, p ... Which have been discharged to the paper receiving tray 27 collide with the paper stopper 28 of the paper receiving tray 27. Since the paper is moved at such a low speed that it does not deform, the paper p, p ...
No such problems can occur when sent to.

[0022]

As described above, according to the present invention, the time and space between the collated sheets, which are partially discharged from the sheet discharging section of the collating machine, are set at the sheet feeding section. The transfer operation is carried out intermittently in correspondence with the intermittent paper discharge operation in the paper discharge section, so that it disappears, and as a result, when the paper is fed from the paper feed section to the paper tray. This is to solve the problem caused by air that occurs when there is a temporal and spatial interval between some of the sheets. That is, it is effective to blow air between the uppermost sheet already placed and the sheet to be placed in order to smoothly slide the sheet to be fed into the sheet tray while positioning it with the sheet stopper. However, if there is a space in terms of time and space between each part of the paper fed from the paper feed section to the paper tray, the paper just before the space, that is, the last paper of the preceding some paper is the paper. While on the pedestal, the air causes the area near the rear edge to float, and the leading paper of some of the paper that follows may slip underneath the floated paper or fold the floated paper upwards to overlap. That is the problem that occurs. As described above, in the present invention, the paper feeding section eliminates such a space existing between each of the succeeding paper sheets, and therefore the above problems cannot occur at all. In addition, as the speed of the collator increases, the paper that is supposed to be sent out from the paper ejection section at high speed is slowed down to an appropriate speed. Even if the tip collides with the paper stopper on the table,
It is simply positioned and stopped, and there is no problem such as bending.

[Brief description of drawings]

FIG. 1 is an overall schematic explanatory view of an embodiment.

FIG. 2 is a schematic explanatory diagram illustrating an operation when a collated sheet is ejected from a sheet ejecting unit of a collator.

FIG. 3 is a schematic explanatory diagram showing an operation in a state in which a part of the paper is fed to the paper feeding unit and the paper ejection from the paper ejection unit is stopped.

FIG. 4 is a schematic explanatory diagram showing an operation in a state in which a part of the paper is fed to the paper feeding unit, and after the paper ejection from the paper ejection unit is stopped, the paper ejection is started again.

[Explanation of symbols]

 1 Collator 2 Paper Feeder 3 Paper Feeder 4 Paper Ejector 5 Collation Belt 6 Guide Plate 7 Paper Ejection Belt 8 Belt Car 9 Belt Car 10 Tension Car 11 Feed Belt 12 Feed Belt 13 Belt Car 14 Tension Car 15 Holding Roller 16 Hold down roller 17 Hold down roller 18 Guide plate 19 Chain wheel 20 Chain wheel 21 Chain 22 Electric motor 23 Chain wheel 24 Chain 25 Air suction machine 26 Paper detection sensor 27 Paper tray 28 Paper stopper 29 Bolt nut 30 Air nozzle a Arrow b Arrow c Arrow d arrow p paper

Claims (2)

[Claims] 1. A paper detection sensor arranged near a paper discharge unit of a collator, which detects whether or not there is a collated paper discharged from the paper discharge unit and moving toward a receiving end of a paper feeding unit described later. The paper detection sensor that detects the paper, the paper feed unit that has a receiving end positioned by making a drop below the paper discharge unit of the collator, and the paper feed unit that has been discharged to the paper receiving tray described below. The sheet receiving table is a driving unit that is driven so as to move at a low speed that does not deform even if it collides with a sheet stopper, which will be described later. The sheet detecting sensor discharges the sheet from the sheet discharging section of the collating machine. The drive means for driving to move to the paper receiving tray side only while detecting the presence of the paper moving toward the edge, and the paper receiving tray whose receiving end is located below the discharge edge of the paper feeding section. There is a paper stopper at the end And the paper receiving stand was example, the vertical collating machine in paper feed device which is constituted by the air blowing means for blowing air between the sheets of paper and immediately below it are sequentially discharged paper on the paper receiving table. 2. A sheet feeding device for a vertical collating machine according to claim 1, further comprising air suction means arranged below a receiving end of said sheet feeding portion for preventing floating of a sheet placed thereon.