JP2003306264A - Paper sheet stacker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet stacker stacking paper sheets assuredly and in a stabled position. <P>SOLUTION: This stacker 1 for mail has a containing portion 2 that contains mail P collected in an upright position, a backup plate 10 that is in contact with an end of the collected mail P in a stacked direction and that energizes the mail matters P to the stacked direction, and a pushing roller 14 placed at a position in contact with, pushing the other end of the collected mail P. The roller 14 is rotated at a peripheral speed Vr slower than the conveying speed V of the mail P sent to the containing portion 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet stacking device for stacking and storing conveyed sheets.

[0002]

2. Description of the Related Art Conventionally, as a paper sheet stacking device, for example,
2. Description of the Related Art There is known a mail collecting device that collects mails conveyed at a relatively high speed by accumulating them in an upright position.

This type of stacking device includes a storage unit for storing the postal items in an upright position, a pushing roller for pushing the postal items conveyed toward the storage unit through a conveying path into the storage unit, and a storage unit. It has a backup plate that urges the mail items accumulated in the stack in the stacking direction and presses them against the pushing roller.

The accommodating section is for stopping the bottom wall for supporting the lower end side of the postal matter, which is conveyed through the conveying path and pushed by the pushing roller, in sliding contact with the lower end side thereof, and the front end in the conveying direction of the postal matter. It has a rear wall.

Then, the succeeding postal matter is conveyed at a high speed to the contact portion between the postal matter and the pushing roller at the end on the side separated from the backup plate in the stacking direction, and the postal matter is pushed into the pushing roller. Is further pushed by the rotation of, and its leading end in the carrying direction is abutted against the rear wall and stopped. In this way, a plurality of mail items are sequentially accumulated in the storage unit.

[0006]

However, in the above-mentioned conventional stacking device, since the rotation speed of the pushing roller is set to be substantially the same as the conveying speed of the mail, the tip of the mail to be pushed into the accommodation portion is It was hit against the rear wall while maintaining high speed. For this reason, there is a problem that the postal items bounce up due to the impact when the front ends of the postal items collide with the rear wall, and the stacking postures are not aligned. In addition, when the mail collides with the rear wall, a large impact noise is generated, which causes a problem of noise.

Further, in the above-described conventional stacking device, among the mail pieces stacked in the accommodating portion, the mail pieces at the end in the stacking direction are in sliding contact with the constantly rotating push-in roller, so that the push-in roller is pushed in as described above. When the roller is rotated at a high speed, there is a problem that the friction between the roller surface and the surface of the mail causes damage to the surface of the mail.

Further, in the above-described conventional stacking device, when the amount of mail collected in the accommodating portion exceeds a certain amount, the weight of the mail itself becomes a heavy load, and the mail at the end and the pushing roller are combined. There is a problem that the pressing force between them becomes large, the pushing operation of the postal matter by the pushing roller is not normally performed, and a jam occurs.

The present invention has been made in view of the above points, and an object thereof is to provide a paper sheet stacking device capable of stacking paper sheets in a reliable and stable posture.

[0010]

In order to achieve the above object, the paper sheet stacking device of the present invention has an abutting wall for abutting and stopping the leading end of the paper sheet in the conveying direction, and a stop at the abutting wall. The storage unit for accommodating the accumulated paper sheets in the surface direction and the first paper sheet at one end in the accumulating direction of the paper sheets accommodated in the accommodating unit are brought into contact with each other to collect the accumulated paper sheets. The urging member urging in the stacking direction, and the second member provided at the other end in the stacking direction at a position sandwiching the stacked paper sheets between the urging member.
The third sheet is transferred to the third sheet, which is conveyed at the first speed, and is rotated at the second speed, which is slower than the first speed, and the third sheet is changed to the second sheet. A pushing roller that pushes into the accommodating part along the conveying direction and abuts the leading end in the conveying direction against the abutting wall,
Is equipped with.

Further, the paper sheet stacking apparatus of the present invention comprises an abutting wall for abutting and stopping the leading end of the paper sheet in the conveying direction,
An accommodating portion for accommodating the paper sheets stopped at the abutting wall in a state of accumulating in the plane direction and a first paper sheet at one end in the accumulating direction of the paper sheets accommodated in the accommodating portion, and accumulating A biasing member that biases the stacked paper sheets in the stacking direction, and a second paper sheet that is provided at a position where the stacked paper sheets are sandwiched between the biasing member and is located at the other end in the stacking direction. In between, the third paper sheet conveyed at the first speed is rotated to rotate while gradually reducing the rotation speed, and the third paper sheet is decelerated to the accommodating portion along the second paper sheet. And a pushing roller that pushes the tip of the roller in the conveying direction to the butting wall.

Further, the paper sheet stacking device of the present invention is provided with an abutting wall extending in a substantially vertical direction for stopping the paper sheet conveyed in an upright position by abutting the leading end in the conveying direction, and stopping at the abutting wall. The storage section for storing the stored paper sheets in a state in which the lower end side thereof is in contact with and supported by the substantially horizontal bottom wall and is accumulated in the plane direction, and the paper sheets stored in the storage section. Paper accumulated between the urging member and the urging member that comes into contact with the first paper sheet at one end in the stacking direction and urges the stacked paper sheets in the first direction along the stacking direction. The third paper sheet, which is provided at the position sandwiching the leaf and is conveyed at the first speed between the second paper sheet and the other paper sheet at the other end in the stacking direction, rotates to rotate the third paper sheet. Second
A pushing roller that pushes the paper sheet along the sheet into the accommodating portion and abuts the leading end in the conveying direction against the abutting wall; and the lower end side of the sheet accommodated in the accommodating portion in the first direction and the first direction. And a moving mechanism for moving in the opposite second direction.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, as a paper sheet stacking apparatus according to an embodiment of the present invention, mail items P (paper sheets) conveyed in a standing position at a relatively high speed are stacked in a plane direction and stored. 1 shows a schematic configuration of a mail collecting device 1 (hereinafter, simply referred to as a collecting device 1).

The stacking device 1 has a storage section 2 for receiving and storing the postal matter P which is transported at a constant speed V (first speed) in the direction of arrow T in the figure via a transport path (not shown). In the present embodiment, the transport speed V of the postal matter P toward the storage section 2 is set to 3.8 [m / s]. Each mail P
Is fed into the accommodating portion 2 in an upright position with its long side along the transport direction T. At this time, the postal matter P is stored in the storage unit 2
The passage is detected by the timing sensor 3 arranged at a predetermined position on the transport path in the front.

The storage unit 2 conveys the bottom wall 4, which supports the lower end side of the mail P fed into the storage unit 2 via the transfer path, that is, the bottom wall 4 which is slidably in contact with one of the long sides of the post P and the mail P. A rear wall 6 (abutting wall) for stopping the postal matter P by abutting one end of the direction, that is, one short side, and a guide for guiding the postal matter P conveyed through the conveying path toward the rear wall 6. It has a plate 8. The guide plate 8 is formed of a substantially rectangular plate whose middle portion is slightly bent.

At the upper end of the rear wall 6 which is separated from the bottom wall 4,
A rail 12 on which a backup plate 10 (biasing member) is slidably attached in the direction of arrow S (accumulation direction) in the drawing.
Is provided. The rail 12 is extended along the stacking direction (first direction, second direction) of the postal matter P.

The backup plate 10 is slid in the direction of arrow S by a slide mechanism (not shown) according to the amount of postal items P accumulated in the container 2 in an upright position. Further, the backup plate 10 is biased by a biasing means such as a spring (not shown) with a constant pressure in the stacking direction (first direction) in a state of being in contact with the postal matter P (first paper sheet) at one end in the stacking direction. Energize.

At the bent middle part of the guide plate 8,
Two push-in rollers 14 which are coaxial with each other and are vertically spaced apart from each other are attached. That is, the push-in roller 14 is provided at a position to sandwich the postal matter P accumulated in an upright position on the bottom wall 4 with the backup plate 10. In other words, the push-in roller 14 is provided at a position where the outer peripheral surface of the postal roller P is slidably contacted with the mail P (second paper sheet) at the other end in the stacking direction. Then, the push-in roller 14 rotates in the arrow R direction in the figure at a constant peripheral speed Vr (second speed) lower than the conveying speed V along the conveying direction T of the mail P.

The push-in roller 14 is separated from the rear wall 6 by a distance at least shorter than the length Lmin of the postal matter P handled by the stacking apparatus 1 which has the shortest length in the conveying direction. It is installed in a different position. In the present embodiment, the pushing roller 14 is positioned and arranged at a position where the distance Lw from the contact position where the outer peripheral surface of the pushing roller 14 contacts the mail P to the rear wall 6 is 6.0 [mm].

Further, at the position where the front end of the postal matter P pushed into the accommodation section 2 by the pushing roller 14 contacts the rear wall 6, the impact when the front end of the postal matter P collides with the rear wall 6 is absorbed. A vibration-proof gel 16 is attached as a shock absorbing material for the purpose. The antivibration gel includes, for example, a silicon-based shock absorbing material, and is formed into a thin sheet to form the rear wall 6.
Is affixed to a predetermined position.

The postal matter P (third paper sheet) conveyed at the speed V through the conveying path is guided along the guide plate 8 and slidably contacts the pushing roller 14 in the stacking direction. It is fed toward the contact portion between the surface of the postal matter P at the end and the outer peripheral surface of the pushing roller 14. At this time,
The pushing roller 14 rotated at the peripheral speed Vr slower than the conveying speed V of the postal matter P contacts the postal matter P, and the pushing roller 14 rotates to accommodate the postal matter P along the end postal matter P. It is pushed further into the part 2. And
The tip of the postal matter P is abutted against the vibration-proof gel 16 of the rear wall 6, and the postal matter P is stopped.

In this manner, the plurality of mail items P that are continuously conveyed are sequentially pushed into the accommodation unit 2, and the plurality of mail items P are accommodated in the accommodation unit 2 in an accumulated state. At this time, the backup plate 10 is slid in the direction of arrow S according to the accumulated amount of the postal matter P by a slide mechanism (not shown).

As described above, according to the present embodiment, the pushing roller 14 is rotated at the peripheral speed Vr lower than the conveying speed V of the mail P, so that the front end of the mail P in the conveying direction is on the rear wall 6. The speed of the postal matter P can be reduced at the time of collision, and the impact generated at the time of collision can be reduced. Further, the shock absorbing effect can be further enhanced by providing the vibration-proof gel 16 at the collision position.

As a result, the postal matter P can be prevented from jumping up when the front end of the postal matter P collides with the rear wall 6, and the postal matter P can be accumulated in a stable posture. In this way, by stabilizing the stacking posture of the postal matter P,
No problems will occur during the subsequent processing.

In the apparatus of this embodiment, the postal matter P
It was possible to reduce the impact noise when the front end of the vehicle hits the rear wall 6.
This solved the noise problem.

Further, since the peripheral speed Vr of the push-in roller 14 is set to be slower than the conveying speed V of the postal matter P, the influence of friction between the postal matter P at the end in the stacking direction and the constantly-rotating push-in roller 14 is reduced. It was possible to prevent the surface of the postal matter P from being damaged due to friction.

In the stacking device 1 of the present embodiment, in order to check the optimum peripheral speed Vr of the pushing roller 14, a predetermined number of postal matter P are conveyed to the accommodating section 2 at a processing speed of 45,000 sheets / hour (conveyance speed V = 3.8 [m / s]) and the peripheral speed Vr of the push-in roller 14 was changed to observe the accumulation state of the postal matter P. The peripheral speed Vr of the push-in roller 14 was ⅓ to 2 of the conveying speed V. / 3 (1.3 [m / s] to 2.5
It has been found that a good integrated state can be obtained when set to [m / s]).

That is, when the peripheral speed Vr of the pushing roller 14 is made faster than 2.5 [m / s] under the above-mentioned conditions, when the front end of the postal matter P collides with the rear wall 6, rebound occurs, The accumulation posture became unstable. Further, the impact sound at this time was at least 72 [db], even though the antivibration gel 16 was attached.

Further, when the peripheral speed Vr of the pushing roller 14 is set to 1.3 [m / s] or less, the accumulation is delayed and a jam occurs. That is, the pushing roller 1
When the peripheral speed Vr of 4 is set to 1.3 [m / s] or less, 46 [ms] or more is required from the time the mail P contacts the push-in roller 14 to the time when it hits the rear wall 6, and the processing speed 45
In the case of 000 sheets / hour, each sheet has a shortest stacking time of only 56 [ms]. Therefore, in consideration of variations in the transport interval, the stacking may not be in time.

On the other hand, the peripheral speed V of the pushing roller 14 is
When r is set to 1.3 to 2.5 [m / s], the tips of all the postal matter P can be aligned within a distance of 5 [mm] from the rear wall 6 to stabilize the stacking posture. I was able to. That is, it was found that a good stacking state can be obtained by setting the peripheral speed Vr of the pushing roller 14 to 1/3 to 2/3 of the transport speed V. Also, the impact sound at this time is
It was about 67 [db].

In this embodiment, the antivibration gel 16 is attached to the rear wall 6, but a general antivibration rubber may be attached instead. In this case, the impact sound is 69 [db]. Met.

Here, the integrated device 1 of the above-described embodiment.
In the following, the peripheral speed Vr of the pushing roller 14 will be considered from another angle.

When the minimum length of the postal matter P is Lmin [mm] and the conveyance gap between the postal matters P conveyed at the speed V [mm / s] is G [mm], one piece of postal matter The minimum time required to accumulate P, that is, the minimum transfer cycle C
min [s] is Cmin = (Lmin + G) / V.

Further, in order to perform a normal integration operation,
Since it is necessary to complete the stacking operation of the preceding postal matter P at least until the leading end of the succeeding postal matter P in the conveying direction comes into contact with the pushing roller 14, the pushing operation for pushing the postal matter P into the accommodation section 2 is performed. The peripheral speed Vr of the roller 14 has the following restrictions. In addition, from the pushing roller 14 to the rear wall 6
Let Lw be the distance to.

Vr ≧ Lw / Cmin That is, the peripheral speed Vr of the pushing roller 14 is set to the conveying speed V.
From the setting of a slower speed and the above-mentioned two equations, it is understood that the peripheral speed Vr of the pushing roller 14 may be set to a speed satisfying V> Vr ≧ Lw × V / (Lmin + G).

Next, an embodiment in which the peripheral speed Vr of the pushing roller 14 is changed as shown in FIG. 2 in the above-described stacking device 1 will be described. Here, mail P
The push roller 14 is accelerated and decelerated within a predetermined speed range each time the sheet is sent to the housing portion 2. Further, here, a stepping motor (not shown) is used as a driving unit for rotating the pushing roller 14. By using the stepping motor, the pushing roller 14 can be easily accelerated and decelerated by giving the driving pulse input to the motor driver while changing the frequency.

In the graph of FIG. 2, the peripheral speed of the pushing roller 14 is plotted on the vertical axis and the elapsed time t [ms] is plotted on the horizontal axis. Further, the timing at which the leading edge of the continuously conveyed postal matter P in the conveying direction passes the timing sensor 3 is P1, and the postal matter P is
The timing at which the tip of the roller contacts the push-in roller 14
2. The timing when the front end of the postal matter P hits the rear wall 6 is indicated by P3.

First, the pushing roller 14 is rotated at Vr = 1.3 [m / s] in a standby state before the mail P is conveyed. And the postal matter P is V = 3.8 [m /
[s] and the leading edge thereof passes the timing sensor 3 as a trigger, the rotation speed Vr of the pushing roller 14 is accelerated from 1.3 [m / s] to 2.5 [m / s]. . The acceleration at this time is such that when the tip of the postal matter P contacts the pushing roller 14, the pushing roller 1
The peripheral speed Vr of 4 is set to 2.5 [m / s].

Then, when the tip of the postal matter P contacts the pushing roller 14, the pushing roller 14 starts decelerating. That is, at this time, the pushing roller 14 is rotated so as to be gradually decelerated while being in contact with the surface of the postal matter P, and the pushing speed of the postal matter P is gradually decelerated. The deceleration at this time is such that the front end of the postal matter P is the rear wall 6
The peripheral speed of the push-in roller 14 is 1.
It is set to return to 3 [m / s]. That is, when the front end of the postal matter P collides with the rear wall 6, the speed of the postal matter P is sufficiently reduced.

The above-described series of acceleration / deceleration operations are repeated for each mail item P, and a plurality of continuously conveyed mail items P are decelerated and sequentially accumulated in the container 2. That is, also in this embodiment, the impact of the postal matter P at the time of collision can be sufficiently reduced, the impact sound at the time of collision can be reduced, and the stacking posture of the postal matter P can be stabilized.

In this embodiment, the impact sound when the postal matter P collides with the rear wall 6 can be reduced to 66 [db]. Further, here, the processing speed of the postal matter P is 45,000 by making the acceleration of the pushing roller 14 larger than the deceleration.
Shortest accumulation cycle Cmin [s] = 80 sheets / hour
[Ms] can be supported.

In the present embodiment, the peripheral speed of the pushing roller 14 is set until the succeeding mail P reaches the timing sensor 3 after the leading end of the preceding mail P hits the rear wall 6. Although Vr is maintained at 1.3 [m / s], the pushing roller 14 may be temporarily stopped if there is a relatively long time before the subsequent mail P arrives. In this way, by stopping the push-in roller 14 during the stacking operation of the postal matter P, it is possible to further reduce the possibility that the postal matter P at the accumulated end rolling on the push-in roller 14 will be damaged by friction. .

Here, the pushing roller 14 of the above-mentioned embodiment is used.
The behavior of is considered from another angle.

That is, the minimum conveyance cycle of the mail P conveyed at the speed V [mm / s] is Cmin [s], and the minimum length of the mail P handled by the stacking device 1 is Lmin [m].
m] and the gap between the mail items P conveyed at the speed V [mm / s] is G [mm], the peripheral speed Vr [mm / s] of the pushing roller 14 is ∫ ₀ ^Cmin Vrdt. It is necessary to satisfy ≧ Lmin + G.

That is, considering the two mail items P sent to the stacking device 1 in the shortest transport cycle Cmin, the stacking operation of the preceding mail items P before the succeeding mail items P contact the pushing rollers 14. Must have been completed. Therefore, the pushing amount ∫ ₀ ^Cmin Vrdt by which the pushing roller 14 pushes the postal matter P into the accommodating portion 2 during the minimum conveyance cycle Cmin is at least the length Lmin of the minimum postal matter P plus the gap G. Must be big. In other words, it is sufficient to accelerate or decelerate the pushing roller 14 so that the pushing amount of the postal matter P by the pushing roller 14 satisfies the above condition.

Next, a modification of the integrated device 1 of the above-described embodiment will be described with reference to FIGS. 3 and 4.
The stacking device 20 differs from the stacking device 1 of the above-described embodiment in that it has a toothed roller 22 that rotates in the stacking direction of the postal matter P. Therefore, for other configurations,
The same reference numerals are given and detailed description is omitted.

The toothed roller 22 is provided so as to be partially exposed in the housing portion 2 through the bottom wall 4. The toothed roller 22 is provided at a position where the rotary shaft 22a thereof is separated from the guide plate 8 by 100 [mm] below the bottom wall 4 (see FIG. 4). The toothed roller 22 has a plurality of teeth 22b on its outer circumference, and can rotate in both the forward and reverse directions at a speed at which the tooth bottom 22c between the adjacent teeth 22b moves at 75 [mm / s] in the accumulating direction. ing.

That is, the toothed roller 22 receives the lower end side of the postal matter P accumulated in the accommodating portion 2 on the tooth bottom 22c of the roller portion exposed in the accommodating portion 2 and rotates in both forward and reverse directions. Then, it functions to move the lower end side of the accumulated mail items P in the accumulation direction. When the toothed roller 22 is not rotating in any direction, the toothed roller 22 rotates together with the postal matter P moving in the stacking direction. In the present embodiment, rotation of the toothed roller 22 is controlled in accordance with the amount of accumulated postal matter P.

When the accumulated amount of the postal matter P accumulated in the accommodating portion 2 is 0 to 70 [mm], that is, when the postal matter P exists in the area a in FIG. 3, the postal matter P is placed on the toothed roller 22. Since it has not reached, the toothed roller 22 is put into an idler state.

The accumulation amount of the postal matter P is 70 to 200 [mm].
At this time (region b in FIG. 3), it is expected that some of the accumulated mail items P act on the toothed roller 22 and fall toward the guide plate 8 as shown in FIG. Therefore, when the accumulated amount of the postal matter P is within the area b, the toothed roller 22
Is rotated in the direction toward the guide plate 8 (second direction) to move the lower end side of the postal matter P in the direction of the guide plate 8 to correct the fall of the postal matter P. On the contrary, toothed roller 2
If 2 is not rotated in the second direction, the postal matter P (second paper sheet) at the end portion which has fallen, as shown in FIG. 4, blocks the conveyance path of the postal matter P and causes a jam.

The accumulated amount of the postal matter P is 200 to 350 [m
m] (region c in FIG. 3), the balance between the weight of the postal matter P itself and the urging force of the backup plate 10 is maintained, so that the toothed roller 22 is rotated in an idler state.

The accumulated amount of the postal matter P is 350 to 540 [m
m] (the maximum accumulation amount of this accumulation device 20 is 540 m
m)), the balance between the weight of the accumulated mail items P and the urging force of the backup plate 10 is lost, and the mail items P
The weight of itself is a heavy load. Therefore, the toothed roller 22 is rotated in the first direction toward the backup plate 10 so as to reduce the pressing force between the postal matter P at the end and the pressing roller 14. As a result, the accumulation amount of the postal matter P is a specified value (35 in the present embodiment).
Even if it exceeds 0 mm), the pressing state between the postal matter P at the end portion and the pressing roller 14 can be kept constant, good stacking operation can be continued, and jamming can be prevented. .

As described above, according to the present embodiment, since the lower end side of the postal matter P accumulated in the accommodating portion 2 can be moved in the accumulating direction, a good accumulating operation is always performed regardless of the accumulation amount of the postal matter P. Can be done. As a result, it is possible to prevent jamming due to defective stacking, and it is possible to prevent excessive friction between the postal matter P at the end and the pushing roller 14.
It is possible to prevent the postal matter P from being damaged.

The present invention is not limited to the above-described embodiments, but can be variously modified within the scope of the present invention. For example, in the above-described embodiment, the case of collecting postal items has been described, but the present invention is not limited to this, and the present invention can be applied to a device that conveys securities such as banknotes and sheets such as ID cards at high speed. It can also be applied.

[0056]

As described above, since the paper sheet stacking apparatus of the present invention has the above-described structure and operation, it can reliably and stably carry paper sheets conveyed at a relatively high speed. Can be stored in the storage unit in a posture.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the external appearance of a mail stacking apparatus according to an embodiment of the present invention.

FIG. 2 is a timing chart showing an example of change in speed of the pushing roller in the embodiment of accelerating and decelerating the pushing roller of the stacking device of FIG.

FIG. 3 is a front view showing a modified example of the integrated device of FIG.

FIG. 4 is a partially enlarged view showing a partially enlarged configuration of a main part of the integrated device of FIG.

[Explanation of Codes] 1 ... Mail collecting device, 2 ... Storage unit, 4 ... Bottom wall, 6 ... Rear wall, 8 ... Guide plate, 10 ... Backup plate, 12
… Rails, 14… Push rollers, 16… Anti-vibration gel, 2
0 ... Accumulating device, 22 ... Toothed roller, 22a ... Rotating shaft, 2
2b ... tooth, 22c ... tooth root, P ... postal matter.

Claims (10)

[Claims] 1. An abutment wall for abutting and stopping the front end of the paper sheet in the conveying direction, a storage portion for accommodating the paper sheets stopped at the abutment wall in a state of being accumulated in the surface direction, and a storage portion. And a biasing member that comes into contact with the first paper sheet at one end in the stacking direction of the stacked paper sheets and biases the stacked paper sheets in the stacking direction; Is provided at a position sandwiched between the urging member and the second paper sheet at the other end in the stacking direction, and the first paper sheet is transferred to the third paper sheet conveyed at the first speed.
Rotation at a second speed slower than that of the
A paper sheet stacking device, comprising: a pushing roller that pushes the paper sheet along a paper sheet into a storage portion and abuts the leading end in the transport direction against a wall. 2. The second speed is 1 of the first speed.
The paper sheet stacking device according to claim 1, wherein the paper sheet stacking device is / 3 to 2/3. 3. The first speed is V [mm / s],
The distance from the position where the pushing roller contacts the third paper sheet to the abutting wall is Lw [mm], and the minimum length along the sheet conveying direction is Lmin [mm], When the gap between the paper sheets conveyed at the first speed is G [mm], the second speed Vr [mm / s]
The paper sheet stacking device according to claim 1, wherein V> Vr ≧ Lw × V / (Lmin + G) is satisfied. 4. An abutment wall for abutting and stopping the front end of the paper sheet in the conveying direction, a storage section for accommodating the paper sheets stopped at the abutment wall in a state of being accumulated in the plane direction, and a storage section. And a biasing member that comes into contact with the first paper sheet at one end in the stacking direction of the stacked paper sheets and biases the stacked paper sheets in the stacking direction; Is provided at a position sandwiched between the urging member and the second paper sheet at the other end in the stacking direction, and is rotated at a rotational speed by contacting the third paper sheet conveyed at the first speed. And a pushing roller that rotates while gradually decelerating, and pushes the third paper sheet into the accommodating portion along the second paper sheet while decelerating the paper sheet so that the leading end in the transport direction abuts against the abutting wall. Characteristic paper sheet stacking device. 5. The paper sheet stacking device according to claim 4, wherein the pushing roller stops the third paper sheet after decelerating the third paper sheet and abutting the abutting wall. 6. The minimum conveyance cycle of the paper sheet conveyed at the first speed is Cmin [s], and the minimum length of the paper sheet along the conveyance direction is Lmin [mm], When the gap between the sheets conveyed at the speed of 1 is G [mm], the second speed Vr [mm / s] is changed so as to satisfy ∫ ₀ ^Cmin Vrdt ≧ Lmin + G. The paper sheet stacking device according to claim 4. 7. The anti-vibration gel for absorbing the impact when the tip of the third paper sheet is abutted is provided on the abutting wall.
The paper sheet stacking device described in 1. 8. An abutting wall extending in a substantially vertical direction for abutting and stopping a leading end of a paper sheet conveyed in an upright position in a conveying direction, and a paper sheet stopped at the abutting wall, a lower end side thereof. And a first paper sheet at one end in the stacking direction of the paper sheets stored in the storage section, with the storage section storing the sheets in a state of being abutted and supported by the substantially horizontal bottom wall and being stacked in the surface direction. And a position for sandwiching the paper sheets accumulated in the accommodating portion with the urging member that is in contact with the sheet urging unit and urges the accumulated paper sheets in a first direction along the accumulation direction. And the second paper sheet, which is provided at the other end in the stacking direction, is rotated by contacting and rotating the third paper sheet conveyed at the first speed between the second paper sheet and the second paper sheet. The pushing roller that pushes the leading end of the paper in the conveying direction to the butting wall against the wall along with the lower end side of the paper sheets stored in the storing part. Paper sheet stacking apparatus characterized by comprising a moving mechanism for moving the first direction and the first direction opposite to the second direction. 9. The moving mechanism includes a toothed roller that is partially exposed from the bottom wall into the housing portion and is rotatable in the first and second directions. Item 8. The paper sheet stacking device according to item 8. 10. The lower end side of the paper sheet stored in the storage section is rotated in the first direction when the upper end side of the paper sheet is tilted in the first direction. In the first direction, and when the accumulated amount of paper sheets exceeds a specified value, the toothed roller is rotated in the second direction to move the lower end side of the paper sheets in the second direction, The paper sheet stacking device according to claim 9, wherein the toothed roller is rotated together with the paper sheet at other times.