JPH115639A - Paper sheet handling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable paper sheets to be stably separated and supplied by keeping the pressing force of a pickup roller against the paper sheet most suitable, instead of depending on the amount of piled paper sheets. SOLUTION: When the amount of paper sheets on a storage part 1 is judged to be large from the amount of movement of a stage 3 at the time when a paper sheet 4 is pressed against a pickup roller 5, tensile force of a spring 51 is strengthened to set the pressing force of the pickup roller 5 against the paper sheet 4 high. When the amount of paper sheets on the storage part 1 is judged to be reduced below a specified value by supplying the paper sheets 4 to move the stage 3, the tensile force of the spring 51 is reduced to set the pressing force of the pickup roller 5 against the paper sheet 4 low.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper handling apparatus provided in an automatic depositing / dispensing apparatus, an optical reading apparatus, or the like.

[0002]

2. Description of the Related Art A sheet handling apparatus operates as an apparatus for separating sheets and an apparatus for stacking sheets. As a sheet separating apparatus, sheets such as sheets, card-shaped media, and booklets are stored in a stacked state, and a pickup roller is pressed against the foremost sheet in the sheets, and the pickup roller is pressed. Is rotated to feed the paper sheet, and a feeding roller and a separation roller disposed opposite to the feeding roller are provided downstream of the pick-up roller in the feeding direction of the paper sheet, and the feeding roller is rotated to further feed the paper sheet. When two or more sheets are fed by the pickup roller, only the sheet in contact with the feed roller is fed, and the remaining sheet is stopped by the separation roller, and the sheet fed by the pickup roller is stopped. Separate the leaf into one leaf and feed it out.

[0003] Further, as a sheet stacking device, this feed-out roller is used as a feed-in roller, a pickup roller is retracted, a necessary stacking space is secured for every predetermined number of sheets, and the feed-in roller is rotated to feed the sheet. Paper, such as paper, a card-shaped medium, and a booklet, are fed into the stacking space. Note that the separation roller is rotatable in the retraction direction.

Usually, in order to separate and feed a paper sheet,
Than the frictional force μ2 of the pickup roller against the sheet,
It is necessary to set the frictional force μ1 of the separation roller small.
Further, when two or more sheets are erroneously picked up, it is necessary to set μ1 larger than the frictional force μ3 between the sheets in order to prevent the sheet on the separation roller side from being fed out.
Therefore, it is necessary to set μ3 <μ1 <μ2. The feeding roller also has a frictional force μ against the paper sheet.
As 2, the same relationship is obtained.

[0005]

Here, the frictional force .mu.2 between the pickup roller and the paper sheet and the frictional force .mu.3 between the paper sheets are described.
Is determined by the pressing force of the pickup roller against the sheet. When the number of stacked paper sheets is large, the accumulation of gaps between the paper sheets causes the stack of stacked paper sheets to have elasticity. In this case, if the pressing force of the pickup roller against the sheet is weak, the sheet can escape with elasticity when the pickup roller is brought into contact with the sheet, and the pressing force is weakened, which is necessary for feeding the sheet. Frictional force μ2
No longer occurs. Therefore, the pressing force of the pickup roller against the sheet is set to be relatively high in accordance with the case where the amount of the accumulated sheet is large. This makes it possible to eliminate the escape by crushing the paper sheet, to obtain a sufficient pressing force, and to generate the frictional force μ2 necessary for feeding the paper sheet.

[0006] However, as the separating and feeding operation is continued, the number of stacked paper sheets decreases. Then, as the elasticity between the sheets decreases, the pressing force of the pickup roller against the sheet increases, and the frictional force μ3 between the sheets increases. For this reason, there is a problem that the balance of μ3 <μ1 is lost, and the paper sheets are easily overlapped and separated and fed.

[0007] Further, if the stacked paper sheets are wrinkled or distorted, the stacked paper sheets are likely to be deformed, so that the portion where the pickup roller is pressed against the paper sheet is crushed by a gap. Even if the thickness decreases, the thickness of the end of the sheet does not decrease so much, the amount of deformation of the sheet increases, and when the pickup roller is rotated in such a state, the end of the sheet is extended. There is a problem that the paper sheet is not separated and fed out by hitting a roller or the like, and a jam is easily generated. Furthermore, if the sheets to be stacked are shaky or folded, a gap is formed between the sheets to be stacked, and even if the necessary stacking space is secured for each predetermined number of sheets, the stacking space that can be stacked Is reduced, and there is a problem that the sheets cannot be stacked because of being interrupted by the stacked sheets.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a sheet separating apparatus for separating and feeding out a sheet fed by a pickup roller pressed against a stacked sheet one by one by a feeding roller and a separation roller. A sheet amount detecting means for detecting the amount of the sheet being pressed, a pressing force variable means for changing a pressing force of the pickup roller against the sheet, and a driving force changing means for driving the pressing force variable means. Control means for increasing the pressing force when it is detected that the amount of stacked paper sheets is large, and reducing the pressing force when it is detected that the amount of stacked paper sheets is small. It is a thing. Therefore, by varying the pressing force of the pickup roller, the sheet is fed out one sheet at a time regardless of the amount of the sheet piled up.

[0009]

FIG. 1 is a side view showing a first embodiment of a paper sheet handling apparatus according to the present invention. Note that the first embodiment will be described as a sheet separating apparatus. FIG. 2 is a side view showing a main configuration of the pressing force adjusting mechanism according to the first embodiment, FIG. 3 is a perspective view showing a main configuration of the pressing force adjusting mechanism according to the first embodiment, and FIG. FIG. 5 is a perspective view showing details of the relationship between the roller and the separation roller, and FIG. 5 is a front view showing details of the gate section. Note that the first embodiment will be described as a sheet separating apparatus.

In the drawing, a storage section 1 has a guide section 2 on the front side, and a stage 3 that can move back and forth is provided at a rear section. The paper sheet 4 is a paper sheet stored in the storage unit 1 in a form accumulated on the stage 3. A pair of pickup rollers 5 is provided on the left and right sides, and a high friction member 6 having a sufficient frictional force to project the paper sheet 4 protruding from the rollers on a part of the outer periphery is provided.
This pickup roller 5 is fixed at a predetermined interval to a shaft 7 located in front of the paper sheet 4.

The pickup roller 5 is formed in such a shape that the relationship between the radius r1 of the portion where the high friction member 6 is provided and the half radius r2 of the other portion is such that r1> r2. The stage 3 of the storage section 1 is moved back and forth in the direction of the arrow by a drive mechanism (not shown).
By moving the stage 3 forward, the foremost sheet 4 can be pressed against the pickup roller 5. The feeding roller 8 has a high friction member 9 on a part of the outer periphery, and as shown in FIG. 4, two ring-shaped grooves 10 are arranged side by side over the entire circumferential direction. Two feed rollers 8 are fixed at a predetermined interval to a shaft 11 provided in parallel with the shaft 7, and are disposed on the distal end side of the storage section 1 so as to be located on the guide section 2.

The separation roller 12 has one ring-shaped groove 13 extending in the entire circumferential direction. This separation roller 1
Reference numeral 2 denotes a lower portion of the guide portion 2, which is attached to a shaft 16 rotatably held by a holding member 14 about a fulcrum 15 as a center of rotation, in alignment with the position of the feeding roller 8. A part of the outer periphery protrudes from the provided hole and meshes with the feeding roller 8 and the grooves 10 and 13 with each other by a predetermined amount δ, and the frictional μ1 of the separation roller 12 is fed by the meshing amount δ with respect to the paper sheet. Occur. The meshing portion between the feeding roller 8 and the separation roller 12 is referred to as a gate portion h.

A plate spring 18 is fixed to the support plate 17 as urging means for urging one end of the holding member 14 upward.
The separation roller 12 meshes with the feeding roller 8 by the force of the leaf spring 18. The adjustment screw 19
The distal end is screwed into the support plate 17 so as to contact the lower surface of the other end of the holding member 14. And this adjusting screw 1
When the rotary shaft 9 is rotated, the rotational motion is converted into a vertical motion of the tip of the adjusting screw 19. Accordingly, the holding member 14 is rotated about the fulcrum 15 by the vertical movement of the adjusting screw 19, whereby the feeding roller 8 and the separation roller 12 are rotated.
The meshing amount δ is changed. The pulley 20 is attached to one end of the shaft 11 and the motor 21
The drive pulley 22 is attached to the rotating shaft of
The belt 23 is wound around the drive pulley 22.

A pulley 24 is attached to the other end of the shaft 11. A pulley 25 is attached to the shaft 7 corresponding to the pulley 24, and a belt 26 is wound around the pulleys 24 and 25, and thus the motor 21 is rotated. Then, the rotational force is transmitted to the pulley 20 via the driving pulley 22 and the belt 23, whereby the feeding roller 8 and the pulley 24 rotate integrally with the shaft 11, and rotate from the pulley 24 to the pulley 25 via the belt 26. Power is transmitted,
As a result, the pickup roller 5 rotates integrally with the shaft 7 in conjunction with the feed roller 8. In addition, pulley 2
The pulleys may be independently driven to rotate without the belt 26 being wound around 4 and 25.

On the other hand, the separation roller 12 and the shaft 16
A one-way clutch (not shown) is provided between
The paper sheet 4 is rotated only in the direction of pushing the paper sheet 4 back to the storage section 1 as shown by the arrow b. Here, the frictional force μ1 of the separation roller 12 against the sheet 4 is determined by the engagement amount δ between the groove 10 of the feeding roller 8 and the groove 13 of the separation roller 12 in the gate portion h as described above. The friction force μ1 of the separation roller 12 increases as the separation roller 12 increases, and the friction force μ1 of the separation roller 12 decreases as the engagement amount δ decreases.

Usually, in order to separate and feed the paper sheet,
The frictional force μ of the high friction members 6 and 9 on the paper sheet 4 at the pickup roller 5 and the feeding roller 8 is larger than μ2.
1 needs to be set small. Further, when two or more sheets 4 are erroneously picked up, μ1 is set to be larger than the frictional force μ3 between the sheets in order to prevent the sheet 4 on the separation roller 12 side from being fed out after the gate portion h. There is a need. Therefore, μ1 needs to be set so that μ3 <μ1 <μ2. The pair of brackets 27 support the shaft 11 outside the feeding roller 8 such that the shaft 11 is rotatable at one end, and rotatably support the shaft 7 at the other end. . The bracket 27 has a projection 28 and a detection projection 29 which are projected upward at predetermined positions on the upper side. The side of the bracket 27 supporting the shaft 7 is a self-aligning bearing, so that the shaft 7
Can be inclined in the front-rear direction.

The frame 30 is a frame that rotatably supports the shaft 11. The post 31 is formed so as to protrude inward from the frame 30, and the post 28 of the bracket 27 abuts on the post 31. Thereby, the rearward rotation angle of the bracket 27 is regulated. The optical sensor 32 includes a pair of a light emitting element and a light receiving element, and is disposed so as to face each other with the detection protrusion 29 interposed therebetween. The optical sensor 32 detects a position of the pickup roller 5 in the front-rear direction. It is. Here, since the left and right pickup rollers 5 can take different front and rear positions, the optical sensor 32 can detect the positions of the left and right pickup rollers 5 in the front and rear direction, respectively.

The optical sensor 35 comprises a pair of a light-emitting element and a light-receiving element, and is disposed so as to face each other with the projecting side of the stage 3 interposed therebetween. The optical sensor 35 detects that the stage 3 is at the origin position. Detection means. The roller 36 is rotatably mounted so as to face the feed roller 37 shown in FIG. 4 which is fixed to the feed roller 8 and the shaft 11 and is in pressure contact with the feed roller 37.

The motor 40 adjusts the pressing force of the pickup roller 5 against the paper sheet 4, and a gear 41 that rotates integrally with the rotation shaft of the motor 40 is attached to the rotation shaft of the motor 40.
The gear 42 meshes with the gear 41 and is rotatably attached to a post 44 provided on a bracket 43 fixedly attached to the frame 30. A post 45 is provided at a predetermined position on the circular plane of the gear 42.
Further, the gear 42 is provided with an arc-shaped groove centered on the post 44, and the post enters the groove to regulate the rotation range of the gear 42.

One end of the link 46 is rotatably attached to the post 45. The shaft 49 is the frame 3
0, and is rotatably mounted on the shaft 49.
A link B47 fixed to the shaft 49 and rotating integrally with the shaft 49, and a link C48 are attached.
A post 50 is attached to the link B47, and the other end of the link A46 is rotatably attached to the post 50.

The spring 51 has one end connected to a link C48.
The other end is attached to the projection 34 of the bracket 27. The spring 52 has one end on the post 39 protruding from the frame 30 and the other end on the protrusion 3 of the bracket 27.
4 is a spring attached to the spring. Spring 51,5
Numerals 2 are provided on the left and right sides, and both generate a pressing force by which the pickup roller 5 pushes the paper sheet 4 backward via the bracket 27 and the shaft 7 by the pulling force. The pressing force generates a frictional force μ3 between the paper sheets.

Here, since one end of the spring 52 is fixedly attached to the frame 30, the pulling force T1 applied to the pickup roller 5 when the paper sheet 4 is separated and fed is constant. On the other hand, the spring 51
Has one end attached to link C48, and link C
The pulling force T2 applied to the pickup roller 5 changes from T2min to T2max depending on the position of 48.

That is, the pulling force T applied to the pickup roller 5 is the sum of the fixed pulling force T1 and the variable pulling force T2, and T = (T1 + T2min) to (T
1 + T2max). The detent spring 54
Its tip engages with the gear 42 to prevent the gear 42 from rotating due to the pulling force of the springs 51 and 52.

FIG. 6 is a control block diagram of the sheet separating apparatus according to the first embodiment. The control unit 61 controls the motor 21 via the motor driver 62 to rotate the pickup roller 5 and the delivery roller 8 to perform a delivery operation. The position of the pickup roller 5 in the front-rear direction is detected from the output of the optical sensor 32, and whether the stage 3 is at the origin position is detected from the output of the optical sensor 35. Further, the motor 40 is driven via the motor driver 63 to change the pressing force of the pickup roller 5 against the sheet 4. Stage 3 by driving means (not shown)
Is moved forward, the paper sheet 4
And the pickup roller 5 is pressed,
The detection protrusion 29 of the bracket 27 is detected by the optical sensor 32. The stage movement amount detection unit 64 detects the amount of movement of the stage 3 from the origin until the optical sensor 32 detects the detection protrusion 29.

The operation of the sheet separating apparatus according to the first embodiment will be described below. First, the pickup roller 5 is rotated by the motor 21 to a position where the high friction member 6 faces the paper sheet 4. Next, the stage 3 is moved forward by a driving unit (not shown), and the foremost sheet 4 on the stage 3 is pressed against the high friction member 6 of the pickup roller 5. When the pickup roller 5 is pushed by continuing to move the stage 3 forward, the bracket 27 rotates around the shaft 11, and the detection protruding edge 29 of the bracket 27 comes to a position where it blocks the optical sensor 32 of the optical sensor 32. The movement of the stage 3 is stopped. This position is referred to as a separation feeding position.

At this time, the stage moving amount detecting section 64 detects the moving amount from the origin of the stage 3 to the separating and extending position, and if the moving amount is large, the control section 61 It is determined that the number of leaves 4 is small, and if the amount of movement is small, it is determined that the number of sheets 4 is large. Here, the stage 3 restarts moving forward with the feeding of the paper sheet, and the separation feeding position moves forward, so that the moving amount from the origin increases. The control unit 61 monitors a change in the movement amount from the output of the stage movement amount detection unit 64. By attaching the shaft 7 of the pickup roller 5 to the bracket 27 via a self-aligning bearing, even if the frontmost position of the paper sheet 4 is inclined, the left and right pickup rollers 5 follow this, and the pickup roller 5 5
Is perpendicular to the paper sheet 4 and the normal force against the paper sheet 4 acts uniformly.

Subsequently, when the motor 21 is rotated by a signal from the control unit 61 in order to feed out and feed the paper sheets 4 accumulated in the storage unit 1, the rotation is performed via the drive pulley 22 and the belt 23. The roller 8 and the pulley 2 are transmitted to the pulley 20 so as to be unified with the shaft 11.
4 rotates, the rotation is transmitted from the pulley 24 to the pulley 25 via the belt 26, and the pickup roller 5 rotates integrally with the shaft 7, whereby the pickup roller 5 and the feed roller 8 are moved at the same speed by the arrow a. Rotate in the same direction.

When the pickup roller 5 rotates in the direction of arrow a and the high-friction member 6 comes in contact with the foremost paper sheet 4, the frictional force acting between the high-friction member 6 and the paper sheet 4 causes the paper sheet 4 to rotate. 4 is fed out in the guide 2 direction. When the leading end of the paper sheet 4 fed by the pickup roller 5 reaches the feed roller 8, the paper sheet 4 comes into contact with the high friction member 9 of the feed roller 8, and is fed by the pickup roller 5. The paper sheet 4 is further sandwiched between the feeding roller 8 and the separation roller 12, and the frictional force acting between the paper sheet 4 and the high friction member 9 due to the rotation of the feeding roller 8 in the direction of arrow a. The paper sheet 4 is conveyed by receiving a feed force in the direction of arrow c.
The sheet is sandwiched between the feed roller 37 and the roller 36 shown in FIG.

At this time, when two or more sheets 4 are fed out by the pickup roller 5, the frontmost sheet 4 in contact with the feeding roller 8 is moved by the arrow c due to the frictional force acting between the sheet 4 and the high friction member 9. The second and subsequent sheets 4 contacting the separation roller 12 receive the feed force in the
Is supported only by the one-way clutch (not shown) and rotates only in the direction of arrow b. Therefore, the feed is stopped by the frictional force acting between the separation roller 12 and only the frontmost sheet 4 is moved by the arrow. It will be sent in the c direction.

When one sheet of paper 4 is fed out,
While receiving the feed force in the direction of arrow c by the frictional force acting between the high frictional member 9 and the force for stopping the feed force by the separation roller 12 at the same time, as described above,
Since the frictional force of the separation roller 12 on the paper sheet 4 is smaller than the frictional force of the high friction member 9 on the paper sheet 4,
The paper sheet 4 is fed in the direction of arrow c along the guide 2 with the rotation of the feed roller 8 in the direction of arrow a.

When a plurality of paper sheets 4 are continuously fed, when the pickup roller 5 and the feeding roller 8 are continuously rotated, the high friction member 6 of the pickup roller 5 is in contact with the paper sheet 4. When only the paper sheet 4 is paid out and the high friction member 6 does not come into contact with the paper sheet 4, even if it comes in contact with a place other than the high friction member 6, slippage occurs and the paper sheet 4 is not fed out. The paper sheet 4 is paid out regularly at intervals. Note that, here, the circumference of the pickup roller is set to a length sufficient for the paper sheet to be fed out at intervals.

In the above-described separating and feeding operation, when the control unit 61 determines that the amount of sheets in the storage unit 1 is large based on the output of the stage movement amount detection unit 64, the gear 42 and the links A46, B47, and C48. Is the position shown in FIG. In this position, the pulling force generated by the spring 51 is increased, so that the springs 51, 5
The pressing force of the pickup roller 5 against the paper sheet 4 by the pulling force of 2 becomes strong.

That is, when the number of the paper sheets 4 in the storage unit 1 is large, the accumulation of the gaps between the paper sheets causes the stacked paper sheets to have elasticity. In this case, if the pressing force of the pickup roller 5 against the sheet 4 is weak, the sheet 4 can elastically escape backward when the pickup roller 5 is brought into contact with the sheet 4, and the pressing force is weakened. The frictional force required to feed out the paper sheet is not generated. Therefore, when the number of sheets 4 in the storage unit 1 is large, the pulling force generated by the spring 51 is increased, and the pressing force of the pickup roller 5 against the sheet 4 by the pulling forces of the springs 51 and 52 is increased. I do. As a result, it is possible to eliminate the escape by crushing the paper sheet 4, obtain a sufficient pressing force, and generate a frictional force necessary for feeding the paper sheet.

When the separating and feeding operation is continued in this state, the number of sheets 4 in the storage unit 1 decreases. Then, as the elasticity between the paper sheets 4 decreases, the pressing force of the pickup roller 5 on the paper sheet 4 increases, and the frictional force μ3 between the paper sheets increases. Therefore, μ3 <
The balance of μ1 is lost, and the paper sheets 4 overlap and are easily separated and fed. Therefore, when the control unit 61 recognizes that the amount of the paper sheet 4 in the storage unit 1 has become smaller than the predetermined amount by the increase in the movement amount from the origin of the stage 3 to the separation and feeding position. , The control unit 61 rotates the motor 40 by a certain amount in the direction of the arrow X1.

When the motor 40 rotates in the direction of arrow X1,
The gear 42 rotates in the direction of arrow X2, the link A46 moves in the direction of arrow X3, and the links B50 and C48 rotate in the direction of arrow X4. By this operation, the spring 5
1 is reduced by a certain amount, the pulling force acting on the pickup roller 5 is reduced, the pressing force of the pickup roller 5 acting on the paper sheet 4 is reduced, and the pressing force is set again to an optimal value of μ3 <μ1. It is possible to continue the operation of separating and feeding out a proper sheet.

Here, the amount of rotation of the motor 40 is experimentally determined and set. Further, the switching of the pressing force may be performed in two stages, or may be performed in two or more stages according to the amount of movement of the stage 3. In the feeding operation after the sheet is replenished on the stage 3, the movement amount of the stage 3 from the origin is reduced. In this case, the control unit 61 rotates the motor 40 by a fixed amount in the direction opposite to the direction of the arrow X1 to increase the pressing force, thereby adjusting the balance of μ3 <μ1 to the case where the paper amount is large.

As described above, in the first embodiment of the present invention, the pressing force of the pickup roller 5 against the sheet 4 is made variable, and the controller 61 Change the pressing force based on the amount information,
Since the control is performed so as to always maintain the optimum pressing force, the separation and feeding operation of the sheet can be always performed without being affected by the amount of the sheet 4 in the storage unit 1.

At this time, the spring that generates the pressing force is replaced with the spring 52 having a fixed pulling force.
And an adjusting mechanism that combines a spring 51 with a variable pulling force, the adjusting mechanism can be operated by a motor with a smaller output than when the adjusting mechanism is configured only with a variable pulling force spring. Can be reduced in size and cost.

FIG. 7 is a side view showing a second embodiment of the paper sheet handling apparatus according to the present invention. The second embodiment will be described as a sheet separating apparatus. FIG. 8 is a control block diagram of the sheet separating apparatus according to the second embodiment. The sheet separating apparatus according to the second embodiment is obtained by adding the sheet running state detection sensor 53 to the sheet separating apparatus described in the first embodiment. The sheet running state detection sensor 53 detects the amount of transmitted light as an optical sensor, and is provided on the sheet conveying path downstream of the gate unit h. The control unit 61 monitors the running state of the sheet 4 from the output of the sheet running state detecting sensor 53, and determines whether the feeding of the sheet has failed, whether the fed sheet interval is appropriate, or whether the gate unit It is determined whether or not the sheets passing through h are fed out while being overlapped.

The rest of the configuration is the same as that of the first embodiment, and the same reference numerals are given and the description is omitted. Next, an operation of the sheet separating apparatus according to the second embodiment will be described. The operation associated with the feeding operation and the control for changing the pressing force according to the sheet amount is the same as the operation described in the operation of the first embodiment.

That is, the control unit 61 rotates the pickup roller 5 and the feeding roller 8 to feed out the paper sheet 4, and further, the amount of the paper sheet 4 in the storage unit 1 is large based on the movement amount of the stage 3 from the origin. At times, the pulling force generated by the spring 51 is increased, and the springs 51, 52
The pressing force of the pickup roller 5 against the paper sheet 4 due to the pulling force of the paper is increased, and when the amount of the paper sheet 4 in the storage unit 1 becomes smaller than a specified amount, the pulling force generated by the spring 51 is reduced, and the pickup roller The pressing force on the paper sheet 4 is weakened by a predetermined amount, and control is performed to always maintain the optimum pressing force without being affected by the amount of the paper sheet 4 in the storage unit 1.

In the second embodiment, in addition to the above-described control, the control unit 61 detects the running of the paper sheet 4 from the output of the paper running state detection sensor 53 when the paper sheet 4 is being fed out. The state is constantly monitored, and when it is detected that the sheets 4 are continuously overlapped and separated and fed out more than a predetermined number of times set in advance, as described with reference to FIG.
By rotating 0 in the direction of arrow X1, the spring 51 is contracted, the pulling force acting on the pickup roller 5 is reduced, and the pressing force of the pickup roller 5 acting on the paper sheet 4 is reduced. That is, the fact that the paper sheets 4 are continuously overlapped and separated and fed is considered that the balance of μ3 <μ1 has been lost, and the pressing force of the pickup roller 5 acting on the paper sheets 4 is reduced by a predetermined amount. By that
The pressing force is set again to the optimal value that satisfies μ3 <μ1, and the normal sheet separating and feeding operation can be continued.

The amount of rotation of the motor 40 during this operation is set experimentally. As described above, in the second embodiment of the present invention, it is determined whether or not the pressing force is optimal based on the transport state of the paper sheet 4 as well as the increase or decrease of the amount of the paper sheet 4 in the storage unit 1. If the paper sheet 4 continues to be fed out in an overlapped state, it is determined that the pressing force is not optimal, and the control is performed so as to maintain the optimum pressing force by reducing the pressing force. Regardless of the amount of the paper sheet 4 in the unit 1, a stable operation of separating and feeding the paper sheet can be always performed.

FIG. 9 is a side view showing a third embodiment of the paper sheet handling apparatus according to the present invention. The third embodiment will be described as a sheet separating apparatus. The sheet separating apparatus according to the third embodiment is obtained by providing a slit 55 in the sheet separating apparatus described in the first embodiment. Slit 5
Reference numeral 5 is provided on the detection projection 29, and is detected by the optical sensor 32 when the detection projection 29 moves. The other configuration is the same as that of the first embodiment, and the same reference numerals are given and the description is omitted.

Next, the operation of the sheet separating apparatus according to the third embodiment will be described. First, the stage 3 is moved forward, and when the sheet 4 of the stage 3 starts to come into contact with the pickup roller 5, the detecting projection 29 is detected by the optical sensor 32, and the control unit 61 sends the sheet 4 to the pickup roller 5. Detect that contact has begun. After this position is changed to P1
And At this time, the slit 55 is located at a distance L1 from the optical sensor 32. Further, when the stage 3 is moved forward, the pickup roller 5 is pushed up by the sheet 4, the optical sensor 32 detects the slit 55 provided in the detection projection 29, and the control unit 61 determines that the sheet is in the separating and feeding position. The movement of the stage is ended upon detecting that the stage has arrived. Hereinafter, this position is referred to as P2.

In a normal sheet, the moving amount of the stage 3 from the position P1 to the position P2 is determined by the thickness L2 of the stacked sheet, whether or not the sheet 4 is pressed by the pickup roller 5. Since there is almost no change, the detecting projection 29 hardly moves. However, since the deposited paper sheet is wrinkled or shaky, and the deposited paper sheet is easily deformed, the deposited paper sheet is compressed even if it is pushed up from the position P1 by the interval L1, and the pickup roller 5 It will not move to the position P2. Since the optical sensor 32 does not detect the detection projection 29 even by the movement of the stage 3, the control unit 61 detects that the sheet 4 of the stage 3 has elasticity, and temporarily stops the movement of the stage 3. Thereafter, the control unit 61 rotates the motor 40 in the direction of the arrow X1 by a fixed amount. When the motor 40 rotates in the direction of the arrow X1, the gear 42 rotates in the direction of the arrow X2, and the link A4
6, the link B47 and the link C48 are indicated by arrows X, respectively.
3. Move and rotate in X4 direction.

By this operation, the spring 51 contracts by a certain amount, the pulling force acting on the pickup roller 5 decreases, the pressing force of the pickup roller 5 acting on the paper sheet 4 decreases, and the spring comes into contact with the pickup roller 5 of the stacked paper sheet. The portion that has been expanded expands and approaches the thickness at the end of the paper sheet 4.
From this state, the stage 3 is moved forward again. In addition,
When this operation is repeated a plurality of times, the amount of deformation becomes smaller. Eventually, the optical sensor 32 detects the detecting projection 29,
When the sheet is fed out by the pickup roller 5, the amount of deformation of the sheet 4 can be reduced and a normal separating operation can be performed.

As described above, in the third embodiment of the present invention, the control unit 61 controls the movement of the stage 3 and the detection projections 29 of the pickup roller 5 based on the detection information of the detection protrusions 29 in the storage unit. Since the pressing force of the pickup roller 5 against the paper sheet 4 is changed in accordance with the elasticity state of the paper sheet, a stable separation and feeding operation of the paper sheet can be always performed without being affected by the state of the paper sheet in the storage unit. it can.

FIG. 10 is a side view showing a fourth embodiment of the paper sheet handling apparatus according to the present invention. The fourth embodiment will be described first as a sheet separating apparatus. In the sheet separating apparatus according to the fourth embodiment, a sheet detecting lever 56 is provided in the sheet separating apparatus described in the first embodiment to detect the foremost sheet of the sheet 4. It was made. The detection lever 56 includes a groove 56 a that is loosely fitted to the shaft 7, and a contact protrusion 56 provided with a roller that contacts the foremost sheet of the sheet 4.
b, and a detection projection 56c, which is rotatably attached to the shaft 11, and is urged toward the paper sheet 4 by a spring 58, one of which is fixed to the detection lever 56 and the other is fixed to the frame 30. I have.

The biasing force of the spring 58 is sufficiently lower than the springs 51 and 52 for urging the pickup roller 5. When the detection lever 56 is not in contact with the paper sheet 4, the detection lever 56 is stationary at a position protruding toward the paper sheet 4 by an interval L4 from the pickup roller 5 due to the length of the groove 56a. The optical sensor 57 includes a pair of a light-emitting element and a light-receiving element, and is disposed so as to face each other with the detection protrusion 56c interposed therebetween.
Is a detecting means for detecting the position in the front-rear direction. The other configuration is the same as that of the first embodiment, and the same reference numerals are given and the description is omitted.

Next, the operation of the sheet separating apparatus according to the fourth embodiment will be described. First, the stage 3 is moved forward, and when the foremost sheet of the stage 3 begins to contact the contact protrusion 56b, the detection protrusion 56c is detected by the optical sensor 57, and the control unit 61 determines that the sheet is It is detected that the contact protruding piece 56b has begun to contact. Hereinafter, this position is referred to as P1 '. Further, when the stage 3 is moved forward, the pickup roller 5 is pushed up by the paper sheet 4 and the detection projection 2
9 is detected by the optical sensor 32, and the controller 61 detects that the paper sheet 4 has arrived at the separating and feeding position, and ends the movement of the stage. Hereinafter, this position is referred to as P2.

In a normal sheet, the movement amount of the stage 3 from the position P1 'to the position P2 is almost equal to the interval (L1 + L4) because the thickness L2 of the stacked sheets hardly changes. However, since the stacked paper sheets are wrinkled or shaky, and the stacked paper sheets are easily deformed, the distance (L1 + L4) from the position P1 ′ is obtained.
Even if it is pushed up only, the deposited paper sheet is compressed, and the pickup roller 5 does not move to the position P2. Since the optical sensor 32 does not detect the detection projection 29 even by the movement of the stage 3, the control unit 61 detects that the sheet on the stage 3 has elasticity, and temporarily stops the movement of the stage 3.

Thereafter, the control unit 61 sets the motor 40 to the arrow X
Rotate a fixed amount in one direction. When the motor 40 rotates in the direction of the arrow X1, the gear 42 rotates in the direction of the arrow X2, and the links A46, B47, and C48 move and rotate in the directions of the arrows X3 and X4, respectively. By this operation, the spring 51 is contracted by a certain amount, the pulling force acting on the pickup roller 5 is reduced, the pressing force of the pickup roller acting on the sheet 4 is reduced, and the portion of the stacked sheet contacting the pickup roller 5 Expands and approaches the thickness at the end of the paper sheet 4. From this state, the stage 3 is moved forward again. When this operation is repeated a plurality of times, the amount of deformation becomes smaller. Eventually, when the optical sensor 32 detects the detecting projection 29 and the sheet is fed out by the pickup roller 5, the amount of deformation of the sheet 4 can be reduced and a normal separating operation can be performed.

Next, the fourth embodiment will be described as a paper sheet stacking apparatus. The sheet stacking apparatus according to the fourth embodiment is different from the sheet separating apparatus described in the fourth embodiment in that the control unit 61 shown in FIG. It is operated as a leaf accumulation device. The other configuration is the same as that of the fourth embodiment, and the same reference numerals are given and the description is omitted.

Next, the operation of the sheet stacking apparatus according to the fourth embodiment will be described. First, in preparation for stacking of the paper sheets 4, the stage 3 is moved forward, and the frontmost paper sheet of the stage 3 pushes the contact projection 56b, and stops once at the position where the detection lever 56 is detected. The stage 3 is moved backward from this position, and stops again at a position where the detection lever 56 is not detected. This position is referred to as an accumulation position. In this state, by rotating the motor 21 in the direction opposite to the direction in which the sheet is separated and fed, the sheets are fed into the stage 3 and accumulated.

When a large number of paper sheets are continuously stacked, the frontmost paper sheet moves forward due to the stacked paper sheets, and the detection projection 56c is detected by the optical sensor 57. At this time, the control section 61 moves the stage 3 backward to a position where the detection projection 56c is not always detected by the optical sensor 57. As a result, even if the sheets to be stacked in the stacking operation have a kink or torn, and the stacking thickness is larger than that of a normal sheet, the stacking space is always secured and stable stacking is realized. it can.

As described above, in the fourth embodiment of the present invention, the amount of movement of the stage 3, the detection protrusion 29 of the pickup roller 5, and the detection information of the detection protrusion 56c of the detection lever 56 are also used. At the same time, the pressing force of the pickup roller 5 against the paper sheet 4 is changed by the control unit 61 in accordance with the elasticity of the paper sheet in the storage unit. It is possible to perform a separating and feeding operation of the paper sheet. In addition, since the stacking space can always be secured without being affected by the state of the paper sheet,
A stable integration operation can be performed.

FIG. 11 is a side view showing a sheet handling apparatus according to a fifth embodiment of the present invention. In the fifth embodiment, an optical sensor 59 is provided on the frame 30 in the sheet separating apparatus described in the first embodiment, and the foremost sheet of the sheet 4 on the stage 3 is When it comes to a position where it comes into contact with the pickup roller 5, it is attached to a position where the light path is cut off by the paper sheet 4. Other configurations are the first
This is the same as that of the embodiment, and the same reference numerals are given and the description thereof is omitted. In the fifth embodiment, an operation of the sheet separating apparatus will be described first.

First, the stage 3 is moved forward, and when the foremost sheet of the stage 3 is detected by the optical sensor 59, the control unit 61 determines that the sheet has come to the position where it starts to contact the pickup roller 5. Is detected. Hereinafter, this position is referred to as P1. Further, when the stage 3 is moved forward, the pickup roller 5 is pushed up by the paper sheet 4,
The optical sensor 32 detects the protruding piece 29 for detection, and the controller 61
Detects that the paper sheet 4 has arrived at the separation feeding position, and ends the movement of the stage 3. After this position
Let it be 2.

In a normal sheet, the amount of movement of the stage 3 from the position P1 to the position P2 is almost equal to the interval L1 because the thickness L2 of the stacked sheets hardly changes. However, since the deposited paper is wrinkled or shaky, the deposited paper is easily deformed,
Even if the sheet P is pushed up from the position P1 by the interval L1, the piled sheets are compressed, and the pickup roller 5 does not move to the position P2. Since the optical sensor 32 does not detect the detection projection 29 even by the movement of the stage 3, the control unit 61 detects that the sheet on the stage 3 has elasticity, and temporarily stops the movement of the stage 3.

After that, the control unit 61 moves the motor 40 to the arrow X
Rotate a fixed amount in one direction. When the motor 40 rotates in the direction of the arrow X1, the gear 42 rotates in the direction of the arrow X2, and the links A46, B47, and C48 move and rotate in the directions of the arrows X3 and X4, respectively. By this operation, the spring 51 is contracted by a certain amount, the pulling force acting on the pickup roller 5 is reduced, the pressing force of the pickup roller acting on the sheet 4 is reduced, and the portion of the stacked sheet contacting the pickup roller 5 Expands and approaches the thickness at the end of the paper sheet 4. From this state, the stage 3 is moved forward again. When this operation is repeated a plurality of times, the amount of deformation becomes smaller. Eventually, when the optical sensor 32 detects the detecting projection 29 and the sheet is fed out by the pickup roller 5, the amount of deformation of the sheet 4 can be reduced and a normal separating operation can be performed.

In the fifth embodiment, the control section 61 shown in FIG. 6 rotates the motor 21 in the reverse direction by the motor driver 62 to operate as a sheet stacking apparatus. The optical sensor 59 is arranged at the position of the interval L4 shown in the fourth embodiment. That is, the optical sensor 59 and the sheet 4 are respectively provided by the optical sensor 57 and the detecting projection 56 in the fourth embodiment.
In this case, the position of the optical sensor 57 is changed, the detection lever 56 is eliminated, and the paper sheet 4 is directly detected. .

Then, the same control as shown in the fourth embodiment is performed, and the stage 3 is moved to secure the integration space. As described above, in the fifth embodiment of the present invention, the movement amount of the stage 3 and the pickup roller 5
The control unit 61 changes the pressing force of the pickup roller 5 against the sheet 4 based on the detection information of the detection projection 29 and the optical sensor 25 according to the elasticity of the sheet in the storage unit. In addition, it is possible to always perform a stable separation and feeding operation of the sheet regardless of the state of the sheet in the storage unit. In addition, since a stacking space can be always secured without being affected by the state of a sheet, a stable stacking operation can be performed.

FIG. 12 is a side view showing a sixth embodiment of the paper sheet handling apparatus according to the present invention, and FIGS. 13 and 14 are perspective views showing the main configuration of a meshing amount adjusting mechanism according to the sixth embodiment. FIG. 15 is a control block diagram of a sheet separating apparatus according to the sixth embodiment. In the configuration of the sixth embodiment, the same components as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the sixth embodiment, the driving mechanism of the pickup roller 5 and the feeding roller 8 is the same as that of the first embodiment, but the pressing roller is not provided with a pressing force adjusting mechanism. 5 is generated only by the spring 33 having a fixed pulling force. Therefore, the pressing force of the pickup roller 5 against the paper sheet 4 is constant. In the sixth embodiment, instead of adjusting the pressing force of the pickup roller 5, the engagement amount δ between the feeding roller 8 and the separation roller 12 shown in FIG. 5 is adjusted.

The details of the meshing amount adjusting mechanism will be described below. The support plate 91 is fixed to the frame 30, and the shaft 101 is rotatably supported by the support plate 91. A worm gear 102 that is coaxial with the shaft 101 and rotates integrally with the rotation of the shaft 101 is attached near the center of the shaft 101.

On the outside of the frame 30 of the shaft 101, a gear 104 that engages with a gear 106 fixed to a shaft of a motor 105 fixed to the frame 30 and is rotated integrally with the shaft 101 is attached. Further, an adjusting screw 103 having a helical gear 103 a that meshes with the worm gear 102 and rotates in synchronization with the rotation of the worm gear 102 is rotatably held on the supporting plate 91. Part 9
1a have a screw part mutually. Therefore, adjusting screw 1
Reference numeral 03 is configured to move in the direction of the adjusting screw 103 by rotating.

The holding member 92 is rotatable about the fulcrum 15 and rotatably holds the separation roller 12, and the coil spring 93 urges the holding member 62 in a direction in which the separation roller 12 approaches the feeding roller 8. . Adjustment screw 1
The tip of 03 is engaged at the engaging portion 92a of the holding member 92, and stops the holding member 92 at a predetermined position against the coil spring 93.

Next, the operation of the sheet separating apparatus according to the sixth embodiment will be described. The feeding operation is the same as the operation described in the operation of the first embodiment.
1 moves the stage 3 to a separation / delivery position by a drive mechanism (not shown), thereby pressing the paper sheet 4 against the pickup roller 5, and controlling the motor 21 to rotate the pickup roller 5 and the delivery roller 8, thereby causing the pickup roller to rotate. The paper sheet 4 pressed to 5 is paid out,
Is to feed.

As an operation of the sixth embodiment, first, an operation of the adjusting screw 103 will be described. When the motor 105 is rotated by a certain amount in the direction of the arrow X1, the gear 106 attached to the shaft rotates in the direction of the arrow X1, and this rotation is transmitted to the gear 104 meshing with the gear 106.
The gear 104 rotates in the direction of the arrow X2, and the shaft 101 and the worm gear 102 that are integrally attached to the gear 104.
Rotates in the direction of arrow X2.

When the worm gear 102 rotates in the direction of the arrow X2, the adjusting screw 103 having the helical gear 103a meshing with the worm gear 102 rotates in the direction of the arrow X3, and the adjusting screw 1 is rotated by the engaging portion 91a.
03 moves a fixed amount in the direction of arrow X4. Adjustment screw 103
Moves in the direction of the arrow X4, the tip of the adjusting screw 103 pushes the engaging portion 92a of the holding member 92 to push down the holding member 92 in the direction of the arrow X5, whereby the separation roller 12 moves away from the feeding roller 8. , The engagement amount δ of the gate portion h described with reference to FIG. 5 decreases, the frictional force μ1 of the separation roller 12 decreases, and the paper sheet 4 easily passes through the gate portion h.

When the motor 105 is rotated in the direction of the arrow Y1 by a fixed amount, contrary to the above operation, the gear 106 rotates in the direction of the arrow Y1, and this rotation is transmitted to the gear 104 to cause the gear 1 to rotate.
04 rotates in the direction of the arrow Y2, and the shaft 101 and the worm gear 102 integrally mounted with the gear 104 rotate in the direction of the arrow Y2. When the worm gear 102 rotates in the direction of the arrow Y2, the adjusting screw 103 rotates in the direction of the arrow Y3, and the adjusting screw 103 moves by a fixed amount in the direction of the arrow Y4.

When the adjusting screw 103 moves in the direction of the arrow Y4, the holding member 92 is pushed in the direction of the arrow Y5 by the coil spring 93, whereby the separation roller 12 moves in the direction approaching the feeding roller 8, and the gate portion h engages. Quantity δ
Is increased, the frictional force μ1 of the separation roller 12 is increased, and it is difficult for the paper sheet 4 to pass through the gate portion h. As described in the first embodiment, when the number of paper sheets 4 in the storage unit 1 is large, the accumulation of the gaps between the paper sheets causes elasticity due to the pile of the stacked paper sheets. In this case, if the pressing force of the pickup roller 5 against the sheet 4 is weak, the sheet 4 can elastically escape backward when the pickup roller 5 is brought into contact with the sheet 4, and the pressing force is weakened.
The frictional force required to feed out the paper sheet is not generated.
Therefore, when the number of sheets 4 in the storage unit 1 is large, the pressing force of the pickup roller 5 on the sheets 4 is set to be strong. In the sixth embodiment, the tension of the spring 52 is fixed to a tension at which an optimal pressing force is obtained when the amount of the paper sheet 4 is large.

When the separating and feeding operation is continued in this state, the number of sheets 4 in the storage unit 1 decreases. Then, as the elasticity between the paper sheets 4 decreases, the pressing force of the pickup roller 5 on the paper sheet 4 increases, and the frictional force μ3 between the paper sheets increases. Therefore, μ3 <
The balance of μ1 is lost, and the paper sheets 4 overlap and are easily separated and fed. Then, when the control unit 61 recognizes that the amount of the paper sheet 4 in the storage unit 1 has become smaller than the predetermined amount set in advance by increasing the moving amount from the origin of the stage 3 to the separating and feeding position. , The control unit 61 rotates the motor 105 in the direction of the arrow Y1 by a fixed amount to increase the meshing amount of the gate portion h, thereby increasing the μ.
1 to restore the balance of μ3 <μ1 so that the normal separation and feeding operation can be continued.

In the feeding operation after the sheet is replenished on the stage 3, the movement amount of the stage 3 from the origin is reduced. In this case, the control unit 61
Is rotated in the direction of the arrow X1 by a fixed amount to reduce the meshing amount of the gate portion h, thereby decreasing μ1 and μ3 <
Adjust the balance of μ1 when the amount of paper is large. As described above, in the sixth embodiment of the present invention, the engagement amount between the feeding roller 8 and the separation roller 12 is made variable,
The sheet 4 obtained by the control unit 61 from the movement amount of the stage 3
Is controlled based on the information on the amount of paper in the storage unit 1 so as to always maintain the optimum amount of engagement. Can be performed.

FIG. 18 is an explanatory diagram showing the relationship between the amount of engagement of the gate portion and the interval between the fed sheets. For the configuration and operation of the gate unit, refer to the description of the sixth embodiment shown in FIG. The transport state of the paper sheet 4 is monitored by the sensor 62 for heavy running, miss swing, and paper sheet interval. State 1: In the heavy running area, the engagement amount δ is too small, so that the paper sheet 4 easily passes through the gate portion h, and the heavy running easily occurs. In addition, since the sheet interval is disturbed, the standard deviation value of the sheet interval is increased, and the average value of the sheet interval is shortened by taking out the sheet. State 2: In the miss swing occurrence area, the meshing amount δ is too large, so that the paper sheet 4 becomes difficult to pass through the gate portion h, and the miss swing easily occurs. In addition, since the sheet interval is disturbed, the standard deviation value of the sheet interval becomes large, and the average value of the sheet interval becomes long due to the missed sheet. State 3: When in the optimum area, the meshing amount δ is optimal, no heavy running or missed swing occurs, and the sheet interval is stable.
The standard deviation value becomes smaller and the average value becomes intermediate.

Next, a method of adjusting the gate portion h will be described. First, when the engagement amount δ of the gate portion h is unknown immediately after assembling or the like, a fixed number of trial separations are performed. From the trial separation, the optical sensor 62 obtains information on the average value / standard deviation value of the double running, missed running, and the sheet interval of the fed sheet, and the control unit 61 outputs the state 1
3 is determined. When the control unit 61 determines that the state is the state 1, the control unit 61 issues a command to increase the meshing amount δ, whereby the motor 105 rotates in the arrow Y2 direction, moves the adjusting screw in the arrow Y4 direction, and adjusts the meshing amount δ. Is increased by a certain amount (to prevent heavy running of paper sheets). Here, the trial separation is performed again.
Repeats the operation of trial separation until it is determined that the state 3 has been entered while increasing the meshing amount δ by a fixed amount.

On the other hand, if the control section 61 determines that the state is the state 2, the control section 61 issues a command to decrease the meshing amount δ, and
As a result, the motor 105 rotates in the direction of the arrow X2, moves the adjusting screw in the direction of the arrow X4, and reduces the engagement amount δ by a certain amount (prevents the paper sheet from swinging). Here, the trial separation is performed again, but the control unit 61 reduces the meshing amount δ by a certain amount until the control unit 61 determines that the state 3 has been entered.
The operation of trial separation is repeated. If it is determined that the state is 3, the adjustment is terminated. In this way,
Although the engagement amount δ of the gate portion h is adjusted, the increase in the engagement amount δ is prevented by the biasing force of the compression spring 93. Therefore, when two or more paper sheets 4 try to enter the gate portion, the gate portion h is adjusted. The compression spring 93 is a spring that generates a very strong biasing force so that h does not open. Therefore, the adjusting mechanism of the gate portion h must be driven by a force that does not lose the biasing force of the compression spring 93,
The motor 105 must be increased in size.

Further, when the separating and feeding operation is actually performed,
There is some variation in the average value of the sheet interval. Therefore, in the adjustment operation of the gate portion, when the engagement amount of the gate portion is not in the optimum region (the standard deviation of the sheet interval is large) and is not the heavy running occurrence region or the missed swing occurrence region, the engagement amount of the gate portion is There is a problem that it is wrongly determined whether the number is too large or too small, and the adjustment is incorrect. Referring to FIG. 18, the average value includes
The variation in the range shown by the dotted line is observed,
When in the area, the engagement amount for the same sheet interval has a difference of, for example, F1 or P1, which causes erroneous adjustment.

FIG. 16 is a side view showing a sheet handling apparatus according to a seventh embodiment of the present invention. FIG. 16 is described as a sheet separating apparatus according to the present invention. FIG. 17 is a control block diagram of the paper sheet separating apparatus according to the seventh embodiment. In the seventh embodiment, a tension spring 160 is used instead of the compression spring 93 shown in the paper separating apparatus described in the sixth embodiment.

In the figure, a holding member 158 is urged in a direction to escape from the feeding roller 8 by a tension spring 160 having one fixed to the holding member 158 and the other fixed to the frame. The adjusting screw 56 is engaged with the engaging portion 161 provided on the holding member 158, and the holding member 158 is
It has stopped at the position regulated by. Extension spring 1
Numeral 60 may be a spring having a small pulling force such that the separating roller 12 does not vibrate during the separating and feeding operation. Optical sensor 16
Reference numeral 2 denotes a pair of a light-emitting element and a light-receiving element, which is provided in the vicinity of the separating and feeding port, and monitors the passage of the sheet by the separating and feeding of the sheet by the gate portion h. The other configuration is the same as that of the sixth embodiment, and the same reference numerals are given and the description is omitted. The engagement amount δ of the gate h is controlled by the control unit 61 so that the motor 105 is controlled to X2, Y
By rotating in two directions, the adjusting screw 56 is moved in X4 and Y4 directions, respectively, to increase or decrease.

Next, a method for adjusting the meshing amount of the gate portion h will be described. First, when the engagement amount δ of the gate portion h is unknown immediately after assembling or the like, a fixed number of trial separations are performed. From this trial separation, the optical sensor 62
The information of the average value / standard deviation value of the heavy running, the missed swing and the sheet interval is obtained by the
Judge which of the following matches.

State 1: The meshing amount δ of the gate portion h is too small, and heavy running has occurred. State 2: The meshing amount δ of the gate portion h is too small, but not so small as to cause heavy running. However, since the sheet interval is disturbed, the standard deviation of the sheet interval is large, and the average value of the sheet interval is shortened by taking out the sheet. State 3: The engagement amount δ of the gate portion h is too large, but not so large as to cause a miss swing. However, the sheet interval is disturbed, so that the standard deviation of the sheet interval is large, and the average value of the sheet interval becomes longer due to the miss swing. State 4: The meshing amount δ of the gate portion h is too large, and the swing has occurred. State 5: The meshing amount of the gate portion h is in the optimum region, no overrunning or missed running occurs, the sheet interval is stable, the standard deviation value is small, and the average value is intermediate.

Here, when it is determined that the state 4 in which the meshing amount of the gate is clearly large is present, the control unit 61 issues a command to decrease the meshing amount δ of the gate h, and the motor 105 moves in the direction of arrow X2. Then, the adjusting screw 56 is moved in the direction of the arrow X4 to reduce the meshing amount δ of the gate portion h by a certain amount (to prevent the paper sheet from swinging). Here, the trial separation is performed again, but the control unit 61 repeats this operation while reducing the meshing amount δ by a certain amount until it determines that the meshing amount δ has entered the state 5. When determining that the state is in the state 1 to the state 3, the control unit 61 issues a command to increase the meshing amount δ of the gate unit h, and temporarily adjusts the gate unit h to the state 4 in which the miss swing occurs. Thereafter, adjustment is performed from state 4.

When it is determined that the state is 5, the adjustment is terminated. That is, when the gate h is adjusted to the F region which is not in the optimum region and no miss swing occurs,
By temporarily setting a state in which the missed swing occurs and performing adjustment from the missed occurrence area, it is possible to prevent erroneous determination whether the engagement amount of the gate portion h is small or large. At the time of adjusting the engagement amount, the rotation amount of the motor 105 determines how far the sheet is separated from the optimum feeding region from the separation and feeding state. Control to rotate. This eliminates the need to separate and feed out extra sheets (double running) when adjusting the engagement amount.

Next, a description will be given of the separation and feeding when an abnormality occurs. If a large number of sheets are caught in the gate portion h during the separating and feeding operation, the sheet is jammed in the gate portion h, and the sheet cannot be moved in both the separating direction and the returning direction. At this time, the optical sensor 162 detects that the sheet does not fall out of the gate part h while the sheet is caught in the gate part h. Further, the control unit 6
1 rotates the motor 105 in the X2 direction by a predetermined amount, widens the gate h, returns the jammed paper to the storage unit 1 once, and eliminates the jam in the gate h. After the paper jam in the gate portion h is eliminated, the gate portion 4 is closed by the amount of the gate portion h being widened, returned to the original engagement amount of the gate portion h, and the separating and feeding operation is restarted.

According to this embodiment, since the opening direction of the gate portion is regulated by the adjusting screw and the holding member is held by a weak spring that does not vibrate the gate portion, the motor has a high output. This eliminates the need and allows the motor to be downsized. In addition, in the event of an abnormality, when the sheet is jammed in the gate portion, the control for opening the gate portion is executed, so even if the sheet is jammed in the gate portion during this abnormal separation and feeding, the machine does not go down, Self-healing can be performed automatically.

The eighth embodiment will be described. The configuration of the eighth embodiment is the same as that of the seventh embodiment, except for the adjustment control of the gate portion h. Next, this adjusting method will be described. First, when the meshing amount δ of the gate portion h is unknown immediately after assembling or the like, a gate home position setting operation is performed to roughly adjust the meshing amount δ of the gate portion h. The home position setting operation of the gate portion h is performed as follows.
First, the adjusting screw 56 is largely moved in the Y4 direction, the holding member 58 is rotated in the direction of the arrow Y5, and the outer peripheral surface of the separation roller 12 is brought into contact with the abutting surface of the groove 10 of the feeding roller 8.

That is, the rotation of the motor 105 causes the separation roller 12 to come into contact with the abutting surface of the groove 10 of the feeding roller 8.
Until the step goes out by reaching the outer surface of
Thereafter, the rotation of the motor 105 is stopped so that the gate h is stopped in a closed state. next,
In response to a command from the control unit 61, the motor 105 is rotated in the X2 direction by an amount set in advance, and the engagement amount of the gate portion h by the feeding roller 8 and the separation roller 12 is set to the engagement amount δ set in advance. The home position is defined as a home position where the engagement amount is slightly larger than the optimal region of the engagement amount δ.

Then, a fixed number of trial separations are executed.
From this trial separation, the optical sensor 62 obtains information on the average value / standard deviation value of the double running, missed running, and the sheet interval for the fed sheet, and the control unit 61 outputs the state 1
Judgment is made to match any one of .about.5. At this time, since the meshing amount δ of the gate portion h is set at a position where the meshing amount is slightly larger than the optimal region, one of the following two states is established. State 1: The meshing amount δ of the gate portion h is too large, but not so large as to cause a miss. However, since the sheet interval is disturbed, the standard deviation of the sheet interval increases, and
The average value of the sheet interval becomes longer due to the miss swing. State 2: The meshing amount δ of the gate portion h is too large, and an empty swing has occurred. Therefore, in this state, as in the seventh embodiment, the gate is adjusted, and the meshing amount δ of the gate portion h is finely adjusted to the optimum region.

The gate adjustment operation is always controlled so as to adjust only from the home position where the meshing amount of the gate portion is large or from the home position. Can be prevented. Also, when adjusting from the home position,
The number of trial separations can be reduced.

The ninth embodiment will be described. The configuration is the same as that of the seventh embodiment, except for the adjustment control of the gate portion h. The ninth embodiment is an adjustment method when the thickness of the paper sheet 4 deposited on the storage unit is extremely small. If the sheet is very thin and the gate portion h is too narrow, the sheet 4 loses the feeding force of the pickup roller 5 and the sheet is easily broken, so the following adjustment method is adopted.

Next, this adjusting method will be described. First, when the engagement amount δ of the gate portion h is unknown immediately after assembling or the like, a fixed number of trial separations are performed. From this trial separation, the optical sensor 62 obtains information on the average value / standard deviation value of the heavy running, missed swing, and sheet interval, and the control unit 61 determines which of the above conditions 1 to 5 matches. . State 1: The engagement amount δ of the gate portion h is too small, and heavy running has occurred. State 2: The meshing amount δ of the gate portion h is too small, but not so small as to cause heavy running. However, since the sheet interval is disturbed, the standard deviation value of the sheet interval is large, and the average value of the sheet interval is shortened by taking out the sheet. State 3: The meshing amount δ of the gate portion h is too large, but not so large as to cause the vibration. However, since the sheet interval is disturbed, the standard deviation value of the sheet interval is large, and the average value of the sheet interval becomes longer due to the missed sheet. State 4: The meshing amount δ of the gate portion h is too large, and the swing has occurred. State 5: the meshing amount δ of the gate portion h is in the optimum region,
Neither heavy running nor swinging occurs, and the paper interval is stable,
The value of the standard deviation value is small, and the average value is intermediate.

Here, when it is determined that the engagement amount of the gate is clearly in the state 1 in which the engagement amount is small, the control unit 61 issues a command to increase the engagement amount δ of the gate portion h, and the motor 105 moves in the arrow Y2 direction. Then, the adjusting screw 56 is moved in the direction of the arrow Y4 to increase the meshing amount δ of the gate portion h by a certain amount (to prevent double running of the paper sheet). Here, the trial separation is performed again, but this operation is repeated until the control unit 61 determines that the engagement amount δ of the gate unit h has entered the state 5. When it is determined that the state is in the state 2 to the state 4, the control unit 61 issues a command to greatly reduce the meshing amount δ of the gate unit h, and temporarily adjusts the gate unit h to the state 1 in which the heavy running occurs. . Thereafter, the adjustment from the state 1 is performed.

When it is determined that the state is 5, the adjustment is terminated. That is, when the gate portion h is adjusted to the P region where the overrun does not occur and is not in the optimum region,
By temporarily setting a state in which a heavy running occurs and performing adjustment from the heavy running area, it is possible to prevent erroneous determination whether the engagement amount of the gate portion h is small or large.

Thus, at the time of trial separation of the gate adjustment, the sheet is prevented from being bent as much as possible.
In addition, since the gate adjustment operation is controlled so as to always adjust only from the smaller engagement amount of the gate portion, it is possible to prevent erroneous adjustment when it is not clear whether the engagement amount of the gate portion is large or small.

[0097]

As described above, according to the present invention, the pressing force of the pickup roller against the sheet is made variable, and the pressing force of the pickup roller against the sheet is increased when the amount of accumulated sheets is large. However, when the amount of deposited paper is small, the pressing force of the pickup roller against the paper is reduced, so that the optimal pressing force can always be maintained regardless of the amount of deposited paper. In addition, it is possible to stably perform the operation of separating and feeding the sheet without being affected by the amount of the sheet.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a sheet handling apparatus according to the present invention.

FIG. 2 is a side view showing a main configuration of the pressing force adjusting mechanism according to the first embodiment;

FIG. 3 is a perspective view showing a main configuration of a pressing force adjusting mechanism according to the first embodiment.

FIG. 4 is a perspective view showing details of a relationship between a feeding roller and a separation roller.

FIG. 5 is a front view showing details of a gate unit.

FIG. 6 is a control block diagram of the sheet separating apparatus according to the first embodiment.

FIG. 7 is a side view showing a second embodiment of the paper sheet handling apparatus of the present invention.

FIG. 8 is a control block diagram of a sheet separating apparatus according to a second embodiment.

FIG. 9 is a side view showing a third embodiment of the paper sheet handling apparatus of the present invention.

FIG. 10 is a side view showing a sheet handling apparatus according to a fourth embodiment of the present invention.

FIG. 11 is a side view showing a sheet handling apparatus according to a fifth embodiment of the present invention.

FIG. 12 is a side view showing a sheet handling apparatus according to a sixth embodiment of the present invention.

FIG. 13 is a perspective view showing a main configuration of an engagement amount adjusting mechanism according to a sixth embodiment.

FIG. 14 is a perspective view showing a main configuration of an engagement amount adjusting mechanism according to a sixth embodiment.

FIG. 15 is a control block diagram of a paper sheet separating apparatus according to a sixth embodiment.

FIG. 16 is a side view showing a sheet handling apparatus according to a seventh embodiment of the present invention.

FIG. 17 is a control block diagram of a sheet separating apparatus according to a seventh embodiment.

FIG. 18 is an explanatory diagram illustrating a relationship between a meshing amount of a gate portion and an interval between fed sheets.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage part 3 Stage 4 Paper sheet 5 Pickup roller 8 Feeding roller 12 Separation roller 40 Motor 46 Link A 47 Link B 48 Link C 51 Spring 52 Spring

Claims (16)

[Claims] 1. A sheet handling device for separating and feeding one sheet at a time by a feed-out roller and a separation roller by a pickup roller pressed against a stacked sheet and detecting an amount of the stacked sheets. Means for detecting the amount of paper sheets to be changed; means for changing the pressing force of the pickup roller against the sheet; means for driving the means for changing the pressing force, and the amount of the paper sheets accumulated by the sheet amount detecting means Control means for increasing the pressing force when it is detected that there is a large amount of paper, and weakening the pressing force when it is detected that the amount of accumulated paper sheets is small. Handling equipment. 2. The sheet handling apparatus according to claim 1, further comprising: a running state detecting unit configured to detect a running state of the sheet downstream of the feeding roller and the separation roller in a feeding direction of the sheet. When the traveling state detecting means recognizes that the sheet is being fed out in an overlapped state, if the frequency is high, the pressing force varying means is driven to reduce the pressing force of the pickup roller against the sheet. apparatus. 3. The sheet handling apparatus according to claim 1, wherein the pressing force varying means includes a spring for urging the pickup roller in the stacking direction, and the spring is configured to have a fixed biasing force and a biasing force. A sheet handling apparatus that changes the biasing force of a spring that varies the biasing force by changing a biasing force of the spring. 4. The paper sheet handling apparatus according to claim 1, further comprising a detection unit configured to detect an amount of movement of the accumulated paper sheet to approach or separate from the pickup roller, and wherein the control unit determines a movement amount according to the movement amount. Paper handling device that varies the pressing force of the pick-up roller. 5. The sheet handling apparatus according to claim 4, further comprising a detecting unit for detecting a position of the pickup roller, wherein the control unit changes a pressing force of the pickup roller according to the position. apparatus. 6. The paper sheet handling apparatus according to claim 5, wherein said detection means includes a detection piece that moves integrally with the pickup roller and an optical sensor that detects the position of the detection piece. 7. The sheet handling apparatus according to claim 5, wherein the detection means detects a detection lever urged to protrude toward a sheet stacked from a pickup roller, and detects a position of the detection lever. A paper handling device consisting of an optical sensor. 8. The sheet handling apparatus according to claim 5, wherein said detecting means comprises an optical sensor provided at a position where the accumulated sheet comes into contact with a pickup roller. 9. A sheet fed by a pickup roller pressed against a stacked sheet is separated one by one by a feeding roller and a separation roller, and the sheet is fed or fed one by one by the feeding roller and a separation roller. In a sheet handling device for stacking sheets, sheet position detecting means for detecting the position of stacked sheets, sheet amount detecting means for detecting the amount of stacked sheets, and sheets of the pickup roller A sheet moving means for adjusting a relative position with respect to a sheet; a pressing force variable means for changing a relative pressing force of the pickup roller with respect to the sheet; a sheet position detected by the sheet position detecting means; The amount of the sheet is detected by the sheet amount detecting means that drives the leaf moving means to adjust the position of the sheet, and the pressing force of the sheet is driven by driving the pressing force varying means. Variable, and paper sheet handling apparatus characterized by comprising a control means. 10. The sheet handling device according to claim 9, wherein the sheet position detecting means is urged to protrude toward a sheet stacked from a pickup roller;
A sheet handling device comprising an optical sensor for detecting the position of the detection lever. 11. The sheet handling apparatus according to claim 9, wherein the sheet position detecting means comprises an optical sensor provided at a position where the accumulated sheet contacts the pickup roller. 12. A sheet handling apparatus which separates and feeds a sheet fed by a pickup roller pressed against a stacked sheet one by one by a feeding roller and a separation roller, and detects an amount of the stacked sheet. Paper amount detecting means, an engaging amount variable means for changing an engaging amount between the feeding roller and the separation roller, and an amount of paper sheets accumulated by the paper amount detecting means by controlling the engaging amount variable means. Control means for reducing the meshing amount when it is detected that there is a large amount of paper, and increasing the meshing amount when it is detected that the amount of the stacked paper sheets is small. Handling equipment. 13. The sheet handling apparatus according to claim 12, wherein the engagement amount variable means urges the separation roller in a direction in which the engagement amount increases, and an adjusting screw for regulating the position of the separation roller. And a sheet handling device comprising an engaging portion integrally provided with the separating roller and engaging with the adjusting screw. 14. The sheet handling apparatus according to claim 12, further comprising: a monitoring unit that monitors a sheet running state between the feeding roller and the separation roller, wherein the monitoring unit detects that a sheet is jammed. The meshing amount varying means temporarily reduces the meshing amount, reverses the paper sheet to remove the meshing of the paper sheet, increases the meshing amount again to return to the state before jamming, and resumes the separation and feeding. Handling equipment. 15. The paper sheet handling apparatus according to claim 12, wherein the control means temporarily increases or decreases the engagement amount to cause a state in which the paper sheet runs over or misses, and from this state, A paper handling device that reduces or increases the meshing amount and adjusts the meshing amount to the optimum area. 16. The sheet handling apparatus according to claim 12, wherein the control unit temporarily sets the engagement amount to a preset state, and adjusts the engagement amount to an optimum area from this state. .