JPH0543064A - Paper sheet delivery device and control thereof - Google Patents

Abstract

PURPOSE:To provide the high separateness of delivery paper sheets by rotating a reverse roller, faced to a feeding roller, in a reverse direction to a delivery direction to push back lower paper sheets on a storage part side, when another lower paper sheet is sticked fast to an upper paper sheet so as to be delivered in delivering the paper sheets. CONSTITUTION:Paper sheets 4, piled on a storage part 1, are pushed upward with a stage 3, and the uppermost paper sheet 4 is made to abut pickup rollers 9a and 9b. The rollers 9a and 9b are moved in a delivery direction with actuators 17a and 17b to draw the uppermost paper sheet from among the piled paper sheets. This paper sheet is separated from the storage part 1 with feeding rollers 13a and 13b to be delivered. The rollers 9a, 9b, 13a, and 13b are repeatedly moved in the delivery direction to deliver the paper sheets 4 one by one in order. At that time when another lower paper sheet is sticked fast to an upper paper sheet so as to be delivered, reverse rollers 20a and 20b faced to the rollers 13a and 13b are rotated in a reverse direction to the delivery direction to push back the lower paper sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device incorporated in an automatic depositing / dispensing machine or an optical reader, and more specifically, it sequentially separates stacked paper sheets such as banknotes, manuscripts or paper sheets. TECHNICAL FIELD The present invention relates to a sheet feeding device and a control method thereof.

[0002]

2. Description of the Related Art Conventionally, as a paper feeding device as described above, there has been one in which a storage unit for storing a large number of paper sheets such as bills and papers is provided with, for example, a vertically movable stage. A large number of paper sheets are stacked on the upper surface of the stage and accumulated, and by moving upward, the uppermost part of the accumulated paper sheets is aligned with the feeding surface. A pair of pickup rollers is arranged on the feeding surface so as to come into contact with the uppermost sheet of the stacked sheets. The pickup roller rotates in the delivery direction at a position where it comes into contact with the paper sheet, and delivers the topmost contacting sheet from the accumulated paper sheets in the delivery direction. The paper sheet fed out from the accumulated paper sheets is further fed out in the feeding direction by a pair of feed rollers arranged in the vicinity of the front end portion of the storage portion in parallel with the pickup roller and conveyed from the storage portion. Sent to the road. This feed roller also rotates in the feeding direction at that position. In this case, the feed roller and the pickup roller are connected via a belt and a pulley and are driven by the same motor so that they rotate in the feeding direction at the same speed.

In some cases, other paper sheets, which are closely attached to the back surface of the paper sheet and are stacked, tend to be drawn out together with the paper sheet delivered by the pickup roller and the feed roller. Therefore, a reverse roller, which faces the feed roller and rotates in a direction opposite to the feeding direction, is arranged near the front end of the storage section. The reverse roller comes into close contact with the back surface of the sheet to be fed and abuts on another sheet to be fed, and pushes the other sheet back to the storage section side.
In this case, the accuracy of separation between the fed paper sheet and another paper sheet is determined by the distance between the feed roller and the reverse roller. For this reason, an adjusting screw for adjusting the position of the shaft of the feed roller is attached. The separation accuracy by the adjusting screw affects the paper sheet delivery accuracy. For example, when the distance between the feed roller and the reverse roller is wide, the paper sheets that are in close contact cannot be separated well, and a chain of paper sheets occurs. If the intervals are too close,
Paper delay occurs. Further, when the distance between the left and right rollers is different, a skew occurs in which the paper sheet is fed in a curved state with respect to the feeding path. Therefore, the shaft position of the reverse roller has been adjusted so that the feeding error such as chain, delay, and skew does not occur.

[0004]

However, as described above, in the prior art, the feed roller and the pickup roller are connected via a pulley or a belt and driven by the same motor. Since such a rotary type motor has a large outer shape, it has to be arranged in a state of largely protruding from the storage portion. Therefore, the conventional sheet feeding device has a problem that the entire device is large and the structure is complicated because the pulley and the belt are used.

Further, in the prior art, the position of the reverse roller opposed to the feed roller is adjusted when a paper sheet feeding abnormality occurs. Therefore, the adjustment is performed only after the feeding abnormality occurs. However, in such an apparatus in which friction between the rollers and friction with the paper surface cannot be avoided, there is a problem that the feeding abnormality cannot be avoided because the meshing amount of the rollers changes. Further, such an interval adjustment is delicate and difficult, and there is a problem that the adjustment must be repeatedly performed when a feeding abnormality occurs. Further, even if the adjustment is automatically performed, it is not possible to immediately solve the abnormality of the paper sheet having the feeding abnormality.

The present invention solves the above-mentioned problems, can downsize the apparatus and simplify the structure, and can solve a feeding abnormality in real time by simple control, and a sheet feeding apparatus. The purpose is to provide a control method.

[0007]

In order to solve the above-mentioned problems, the paper feeding device according to the present invention has a large number of paper sheets stacked and stored in the storage portion in the stacking direction from one side of the paper sheets. In a sheet feeding device that sequentially feeds sheets one by one in a feeding direction that is substantially orthogonal to each other, a pressing unit that presses the stacked and stored sheets toward one side in the stacking direction, and one side by the pressing unit. The paper sheet is pressed against the one side surface and is repeatedly moved in the feeding direction along the one side surface to pull out the one side paper sheet from the accumulated paper sheets. The first feeding means is disposed downstream of the first feeding means in the feeding direction and comes into contact with the paper sheet pulled out by the first feeding means to respond to the movement of the first feeding means. Guide A second feeding means for feeding the paper sheet from the storage portion to the feeding path by moving in the feeding direction, and the second feeding means are arranged so as to face the second feeding means, and are closely attached to the back surface side of the fed paper sheet. It is characterized in that it is provided with a separating means for separating another paper sheet which comes into contact with another paper sheet to be fed out and rotates in a direction opposite to the feeding direction to closely adhere to the paper sheet to be fed out.

In this case, the first feeding means is a pair of sheets arranged at a predetermined interval in a direction substantially orthogonal to the feeding direction on one surface of the paper sheet which is pressed to one side by the pressing means. The pickup roller includes a pickup roller and a roller moving unit that repeatedly moves the pickup roller along the feeding direction. When the pickup roller moves in the feeding direction, the rotation of the pickup roller is regulated and a sheet that comes into contact with the pickup roller is abutted. When returning in the direction opposite to the drawing-out and feeding-out direction, it is preferable to rotate the paper surface in the movement direction and return.

The roller moving means of the first feeding means is a support means for supporting the rotary shaft of the pickup roller while restricting the rotation axis of the pickup roller to only one direction, and linearly reciprocating the supporting means along the feeding direction. It is further preferable that the actuator includes a linear drive actuator that moves the pickup roller repeatedly in the feeding direction by moving the pickup roller, and this actuator is capable of changing the movement amplitude of the support means and the repetition cycle thereof at any time.

The second feeding means includes a pair of feed rollers arranged at a predetermined interval in a direction substantially orthogonal to the feeding direction on one surface of the sheet fed by the first feeding means. , A roller moving means for repeatedly moving each of the feed rollers along the feeding direction, and the feed roller rotates in the direction opposite to the feeding direction and rotates in the direction opposite to the feeding direction. It is good to be configured to be restricted.

The roller moving means of the second feeding means supports the feeding roller while restricting the rotation axis of the feed roller to only one rotation, and linearly reciprocates the supporting means in the feeding direction. A linear drive actuator that moves the feed roller by
It is further preferable that the actuator be configured so that the movement amplitude of the support means and its repetition period can be changed at any time.

Further, it is preferable that the roller moving means of each of the first feeding means and the second feeding means be repeatedly moved in association with each other so that the pickup roller and the feed roller move toward and away from each other.

On the other hand, it is preferable that the pressing means is provided with an absorber roller which is arranged so as to face the first feeding means and which comes into contact with the surface of the other side of the stacked sheets and rotates in the feeding direction.

Further, the separating means is arranged opposite to the second feeding means so as to sandwich the feeding surface and a pair of reverse rollers which rotate in a direction opposite to the feeding direction, together with these reverse rollers. A pair of reverse arms that rotate and return the paper sheets returned to the stacking position by the reverse roller to the stacking position are provided, and the pair of reverse rollers are independently driven on each side of the pair.

In this case, the separating means presses the pair of reverse rollers against the second feeding means at the time of feeding the paper sheet, and slightly separates the pair of reverse rollers from the second feeding means after the paper sheet is fed out. It is preferable to provide a roller contacting / separating means for causing the contact.

On the other hand, in the control method of the paper feeding device according to the present invention, the pressing means for pressing a large number of the paper sheets accumulated in the storage portion to one side in the stacking direction, and the large number of the paper sheets pressed by the pressing means. A pair of pickup rollers that are in contact with one side of the paper sheet, a pair of feed rollers that are arranged in parallel with the pickup rollers at a feeding position, and a roller movement that repeatedly moves the feed rollers and the pickup rollers so as to approach and separate from each other. Means and
A reverse roller arranged opposite to the feed roller and rotating in a direction opposite to the feeding direction is provided, and the pickup roller and the feed roller are repeatedly approached and separated from each other, so that the stacked sheets on one side are fed out. In the method of controlling the paper feeding device, which separates and returns the other paper that is about to be fed out in close contact with the back surface of the paper by rotating the feed roller in the opposite direction, Both side edges of the paper sheet fed out by the feed roller are continuously detected within a predetermined range, and the presence or absence of chain, delay, and skew of the paper sheet is judged based on the detection result. If it is a chain, the movement amplitude of each roller by the roller moving means is reduced or stopped, and if the determination result is a delay, The moving amplitude of each roller by the roller moving means is increased, and when the determination result is a skew, the moving amplitude of one of the pair of rollers of each roller is decreased or increased by the roller moving means. Characterize.

[0017]

According to the paper feeding device of the present invention, the accumulated paper leaves are pushed by the pressing means to one side for feeding, and the one side paper sheet is brought into contact with the first feeding means. .. The first feeding means pulls the abutted paper sheet in the feeding direction out of the accumulated paper sheets by moving in the feeding direction. By this drawing, the second feeding means comes into contact with one surface of the fed paper sheet and further moves in the feeding direction, thereby feeding the paper sheet from the storage section. At this time, the paper sheet that is about to be delivered in close contact with the back surface of the delivered paper sheet is brought into contact with the separation means that faces the second delivery means and that rotates in the opposite direction to the delivery direction. It is pushed back to the storage side. Also,
When a feeding abnormality such as a chain, a delay, or a skew is about to occur during feeding, the first feeding means and the second feeding means.
By adjusting the movement amplitude of each of the feeding means, the abnormality of the fed paper sheet is corrected and the feeding operation is performed in a normal state.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sheet feeding device and its control method according to the present invention will be described in detail below with reference to the accompanying drawings.

First, a first embodiment of the paper feeding device according to the present invention will be described with reference to FIGS. In these figures, the storage part 1 is a part where a large number of paper sheets 4 are accumulated. A peripheral portion of the storage portion 1 is formed by a rear frame 1a, a front frame 1b, and two side frames 7. Only one side of the side frame 7 is shown. A vertically movable stage 3 is arranged between these peripheral frames, and paper sheets 4 are accumulated on the stage 3.

An upper end of the front frame 1b is bent forward at the position where the paper sheet 4 is fed out and is continuous with the guide plate 2. The guide plate 2 extends substantially horizontally in the feeding direction to form a feeding path. This guide plate 2
In the bent portion with the front frame 1b, elongated cutout holes 2a and 2b are formed near the left and right ends, respectively. Reverse levers 5a and 5b which rotate in conjunction with the ascent and descent of the stage 3 are arranged in these notch holes 2a and 2b. These reverse levers 5a and 5b are mechanism members for returning the paper sheets 4 dragged at the time of unwinding to the original stacking state after the unwinding of the paper sheets 4 on the stage 3 is completed by cooperation of respective rollers described later. Is.
These reverse levers 5a, 5b are interlocked with the lowering movement of the stage 3 by gears, springs, etc., and are pivoted about a fulcrum 6 as shown in FIG. Arrange. These reverse levers 5a, 5b
When the sheet is fed, the sheet is inserted into the lower side of the guide plate 2 so as not to hinder the feeding of the sheet 4.

The stage 3 constitutes a pressing means for aligning the uppermost paper sheet of the stacked paper sheets 4 by moving up at the time of delivery and for pushing the stacked paper sheets 4 upward. There is. As shown in FIG. 2, the stage 3 has two cutout holes which are parallel to the left and right and slightly rearward from the central portion thereof.
3a and 3b are formed. Absorber rollers 8a, 8b of small diameter are arranged in these notch holes 3a, 3b.
These absorber rollers 8a, 8b are used when the paper sheet 4 is fed out and becomes small in the storage portion 1, and when the paper sheet 4 is fed out in cooperation with a pickup roller described later. In front of and behind the absorber rollers 8a, 8b, the cut-and-raised parts 3c, 3d in which the stage 3 is bent downward so that the paper sheet 4 is not caught in the cutout holes 3a, 3b.
Are formed respectively.

On the other hand, a pair of left and right pickup rollers 9a and 9b are arranged above the storage unit 1 so as to face the sheet feeding surface and to face the absorber rollers 8a and 8b. These pickup rollers 9a, 9b pull out the abutting paper sheet 4 in the feeding direction, and their outer peripheral portions 10a, 10b have a high frictional force having a sufficient frictional force for feeding and feeding the paper sheet 4. It is formed of each member. The rotation shafts 12a of these pickup rollers 9a, 9b,
The rollers 12b are rotatably supported by roller brackets 11a and 11b, respectively. One-way clutches are arranged between the roller brackets 11a, 11b and the pickup rollers 9a, 9b, respectively, and these one-way clutches rotate the pickup rollers 9a, 9b only in the direction of arrow a, that is, in the feeding direction. It has become. The roller brackets 11a, 11b are each formed in the shape of a bar plate extending in the feeding direction, and their ends are respectively connected to actuators 17a, 17b having a cylindrical cylinder. In the case of this embodiment, these actuators 17a and 17b are, for example, electromagnetic magnet type linear drive motors, and by exciting the electromagnetic magnets with a positive current, the roller brackets 11a and 11b are drawn into the cylinder to generate a negative current. Roller bracket by exciting
It is an actuator that pushes 11a and 11b out of the cylinder to expand and contract. These actuators 17a and 17b are
By repeatedly expanding and contracting the roller brackets 11a and 11b, the pickup rollers 9a and 9b are repeatedly moved in the feeding direction. As these actuators 17a and 17b, in addition to the electromagnetic magnet type actuator, a piezoelectric linear drive actuator can be applied.

Further, a pair of left and right feed rollers 13a, 13b are arranged on the front end side of the storage section 1 so as to be parallel to the pickup rollers 9a, 9b, facing the feeding surface.
These feed rollers 13a and 13b have their respective outer peripheral portions 14
Like the pickup rollers 9a and 9b, a and 14b are formed of high friction members. The rotation shafts 16a and 16b of these feed rollers 13a and 13b are the brackets on the pickup roller side.
It is rotatably supported by roller brackets 15a and 15b similar to 11a and 11b. These roller brackets 15a, 15b
A one-way clutch is also provided between the feed rollers 13a and 13b and the feed rollers 13a and 13b, and the feed rollers 13a and 13b rotate only in the feeding direction a. Roller bracket
15a, 15b are formed in the shape of a bar plate extending toward the pickup rollers 9a, 9b, and their ends are connected to actuators 18a, 18b each having a cylindrical cylinder. These actuators 18a, 18b are driven by a positive current to attract the ends of the roller brackets 15a, 15b and pull them toward the storage section 1 side, and by being driven by a negative current, the roller brackets 15a, 15b are driven. Push in the feeding direction to expand and contract. By repeating this drive current, the feed rollers 13a and 13b are repeatedly moved in the directions opposite to the feeding direction.

Actuators 17a, 17b for moving these feed rollers 13a, 13b and pickup rollers 9a, 9b
The actuators 18a and 18b that move the
The 11a, 15a and the roller brackets 11b, 15b are arranged in a straight line along the feeding direction. These two sets of actuators are connected by a joint beam 19 in parallel and rotatable about the joint beam 19. As a result, an integrated roller assembly is formed so as to form an entire H shape including the roller bracket. In this roller assembly, for example, a joint beam is supported by a support mechanism and is arranged so as to be parallel to the payout surface, and the lower surface of each roller faces the payout surface.

On the other hand, a pair of left and right reverse rollers 20a, 20b are arranged below the guide plate 2 on the front side of the storage section 1 so as to face the feed rollers 13a, 13b, respectively. These reverse rollers 20a, 20b are attached on the same axis by a shaft 21 located below the guide plate 2, and a part of the outer periphery from the through hole provided in the guide plate 2 is on the upper surface side of the guide plate 2. Protruding into the feed roller
Pressed against 13a and 13b respectively. These reverse rollers 20a, 20b are constantly applied with a low torque and high rotation power by a motor or the like in a direction for pushing the paper sheet 4 back to the storage section 1 side via the shaft 21 as shown by an arrow b. Further, the frictional force of the reverse rollers 20a, 20b on the paper sheet 4 on the outer peripheral portion is set to be smaller than the frictional force of the high friction members of the pickup rollers 9a, 9b and the feed rollers 13a, 13b on the paper sheet 4, This prevents double feeding of the medium 4.

In addition, the line photo sensors 22a, 22b for continuously detecting both side ends of the paper sheet 4 delivered from the storage unit 1 within a predetermined range are provided in the paper sheet delivery path along the guide plate 2.
Are arranged in two rows on the left and right. These line photosensors 22a and 22b are composed of a plurality of light emitting elements and light receiving elements which are vertically opposed to each other, and are connected so that the output of each light receiving element is sent to the control circuit 23 shown in FIG.
The control circuit 23 processes the detection signals supplied from the line photosensors 22a and 22b to determine the sheet separating and feeding state, and generates an output signal for controlling the actuators 17a to 18b. .. The feed rollers 13a, 13b and the reverse rollers 20a, 20b, and the pickup rollers 9a, 9b and the paper sheet 4 or the stage 3 when there is no paper sheet 4 are biased by a bias spring or the like so that the pressure on the left and right sides is uniform. It is pressurized when unrolling,
The control circuit 23 also controls each of the actuators 17a to 18b in the case where the paper sheet 4 is in a skewed state in which the paper sheet 4 is fed out to the left and right unbalanced state, etc., and performs control to restore the drawn out state of the paper sheet to be returned to the normal state. ..

Next, the basic operation of the sheet feeding device having the above-mentioned structure will be described with reference to FIGS. The rollers provided in front of the feed rollers 13a, 13b and the reverse rollers 20a, 20b in FIG. 4 (D).
Numerals 24 and 25 are transport rollers for transporting the paper sheet delivered from the storage unit 1 to the next step or the transport path.

First, when the stage 3 of the storage unit 1 is raised by the drive mechanism, the uppermost sheet 4 on the stage 3 is brought into pressure contact with the pickup rollers 9a, 9b. At this time,
The reverse levers 5a, 5b rotate about the fulcrum 6 in conjunction with the rise of the stage 3 and are fixed in the cutout holes 2a, 2b of the guide plate 2 so as not to interfere with the feeding of the sheet 4. Incline to the angle and retreat. In this state, the reverse rollers 20a, 20b are rotated in the direction of arrow b by a motor or the like, and the actuator 17 is driven based on the output of the control circuit 23.
When a to 18b are driven, the drive causes the roller brackets 11a, 11b and 15a, 15b to expand and contract.

In this case, first, the roller brackets 11a, 11
When b and 15a, 15b are driven in the contracting direction as shown in FIG. 4 (A), the pickup rollers 9a, 9b move in the feeding direction, and the feed rollers 13a, 13b move to the storage section 1 side. At this time, since the pickup rollers 9a, 9b are locked by the action of the one-way clutch, the topmost sheet 4 is pushed forward by the frictional force with the high friction members 10a, 10b by the amount of contraction of the roller brackets 11a, 11b. And is sent to the feed rollers 13a, 13b side. Feed rollers 13a, 13b
The front end of the paper sheet 4 sent to the side is the reverse rollers 20a, 20
It is sandwiched between the feed rollers 13a and 13b which rotate and retreat on b. At this time, the reverse rollers 20a, 20b
Is not rotated by the rotational force of the feed rollers 13a, 13b, the front end of the paper sheet 4 is guided by the rotation of the feed rollers 13a, 13b onto the reverse rollers 20a, 20b and is normally sandwiched.

Then, when the roller brackets 11a, 11b and 15a, 15b are driven in the extending direction as shown in FIG. 4B, the feed rollers 13a, 13b are locked by the action of the one-way clutch. The uppermost sandwiched sheet 4 is pushed by the amount of expansion of the roller brackets 15a, 15b by the frictional force with the high friction members 14a, 14b, and is further forwarded. At this time, the reverse roller 20a,
The force to push it back to the storage part 1 side works due to 20b,
Since the frictional force of the high friction members 14a and 14b on the paper sheet 4 is larger than the frictional force of the reverse rollers 20a and 20b on the paper sheet 4, the feeding of the paper sheet 4 is not hindered. Needless to say, when the second sheet 4 is delivered in close contact with the uppermost sheet 4, the second sheet 4 is pushed back to the storage section 1 side by the reverse rollers 20a, 20b. During this operation, the pickup rollers 9a, 9b rotate in the direction of arrow a and move backward on the paper sheet 4, so that they do not hinder the feeding of the uppermost paper sheet 4.

Next, as shown in FIG. 4 (C), when the roller brackets 11a, 11b and 15a, 15b are again moved in the contracting direction, the sheet 4 is thereby picked up by the amount of contraction of the roller brackets 11a, 11b. 9a, 19b high friction member 10a,
It is sent to the feed rollers 13a, 13b side by the frictional force with 10b. At this time, the feed rollers 13a, 13b are difficult to rotate because they are subjected to the rotational load in the direction opposite to the feeding direction of the paper sheet 4 by the reverse rollers 20a, 20b, and thus the high friction members 10a, 10b of the pickup rollers 9a, 9b are used. The paper sheet 4 is bulged by the amount of feeding.

Next, as shown in FIG. 4 (D), when the roller brackets 11a, 11b and 15a, 15b move again, the uppermost sheet 4 is fed by the amount of expansion of the roller brackets 15a, 15b. High friction members 14a, 14 of rollers 13a, 13b
When it is sent forward by b, the bulge of the paper sheet 4 is eliminated. At this time, it goes without saying that the pickup rollers 9a, 9b rotate in the direction of the arrow a and are not related to the feeding of the sheet 4.

In this way, the uppermost paper sheet 4 is fed out from the storage unit 1, and the leading end of the paper sheet 4 is between the pre-rotating conveying rollers 24 and 25, as shown in the figure. When pinched, the paper 4 is forcibly fed by the carrying rollers 24 and 25 and carried to a predetermined processing unit in the next process. At that time, the pickup rollers 9a, 9b and the feed rollers 13a, 13b follow the conveying speed of the paper sheet 4 and follow the arrow a.
Since the paper sheet 4 rotates in the direction, the paper sheet 4 is not torn.

By repeating the above operation, the sheets 4 are separated and fed out one by one by a predetermined number. When the stage 3 descends after the delivery is completed, the reverse levers 5a and 5b rotate in conjunction with it, and return from the retracted position to the original position shown by the broken line in FIG. 2, whereby the reverse rollers 20a and 20b are delivered during the delivery operation. The paper sheet 4 dragged to the side is pushed back to complete the process.

Next, the control method in this embodiment will be described with reference to the above-mentioned drawings and FIGS. 5 to 6. Note that S in FIG. 5 indicates a processing step, and the following description will be given according to this processing step.

First, when the number of sheets 4 is specified by a keyboard or the like (not shown) and the feeding instruction is input, this input information is sent to the control circuit 23 via the control unit (not shown), and control is performed based on this. The circuit 23 causes the above-mentioned separation feeding operation. As a result, the paper sheets 4 are separated from the storage unit 1 one by one and sequentially fed out (step S1). When the paper sheet 4 is unwound from the storage unit 1, both side portions of the leading edge thereof are a left side (hereinafter referred to as L side) line photo sensor 22a and a right side (hereinafter referred to as R side) line photo sensor
The detection signal is continuously detected by 22b, and the detection signal is input to the control circuit 23 as sheet position information (step S2).
The control circuit 23 determines the feeding state based on the sheet position information (step S3).

The determination of the feeding state is to check whether or not the feeding delay or the chain of the paper sheet 4 has occurred, and if there is no delay or the chain, the process proceeds to step S6. Further, in the case of chaining, only the second and subsequent sheets of the paper sheet 4 are controlled, and by controlling the time from the completion of the delivery of the preceding paper sheet 4 to the delivery of the subsequent next paper sheet 4 Done. That is, in the chain of the paper sheets 4, the leading edge of the preceding paper sheet 4 is the line photo sensor 22a,
Since the time interval from the passage of 22b to the detection of the leading edge of the next succeeding paper sheet 4 by the line photosensors 22a, 22b is shorter than the preset time range, L, R
The separating / feeding interval of the sheet 4 is controlled by reducing the amplitude of each of the actuators 17a, 18a and 17b, 18b on the side or temporarily stopping them (step S4).

On the other hand, when the feeding is delayed, the first sheet 4 is controlled. If the delay is the first sheet 4 of paper, the second and subsequent sheets of paper 4 are preceding from the time the separation feed command is issued until the leading edge of the sheet 4 is detected by the line photosensors 22a and 22b. The tip of the line photo sensor 22
Since the time interval from the passage of a and 22b to the detection of the leading edge of the succeeding paper sheet 4 by the line photosensors 22a and 22b is longer than the set range, the actuators 17a and 18a on the L and R sides are The separation and feeding interval of the paper sheet 4 is controlled by increasing the amplitude of 17b and 18b (step S
Five).

Thereafter, the line photo sensor 22a,
The paper sheet detection signal of 22b is input to the control circuit 23 as paper sheet position information (step S6), and the control circuit 23 determines the fed state based on this paper sheet position information (step S6).
7). This determination of the feeding state is to check whether the sheet 4 is skewed leftward or rightwardly. If there is no skew and the skew is normal, the process proceeds to step S10. Assuming that the sheet 4 is skewed and fed out as shown in FIG. 6, the control circuit 23 determines the skew angle D from the relationship between the distance L between the L-side and R-side line photosensors 22a and 22b and the skew amount D. θ is calculated by the equation of θ = tan-1 (D / L), and either of the L side actuators 17a, 18b and the R side actuators 17b, 18b is selected depending on the skew angle θ, the leading angle and the feeding speed condition. One or both amplitudes are controlled to be increased or decreased.

That is, if the skew of the sheet 4 is left ahead, the actuator on the L side is calculated based on the calculation as shown in FIG.
The amplitude of 17a, 18a is decreased or the amplitude of the actuator 17b, 18b on the R side is increased (step S8). To determine whether the amplitude is increased or decreased, the proper one is selected from the feeding speeds, but depending on the case, both the left and right actuators may be changed. The same applies to the skew on the right side, and the actuator 17 on the R side is calculated based on the above calculation.
The amplitude of b, 18b is decreased or the amplitude of the L side actuators 17a, 18a is increased (step S9). In this case, the determination of the increase or decrease of the amplitude is made by selecting an appropriate one from the feeding speed as described above, but depending on the case, both the left and right actuators may be changed. These controls are calculated and executed by the control circuit 23 so as to be completed within the correction time Δt so as to be completed before the sheet 4 is sent to the high-speed transport rollers 24, 25.

In this case, the correction time Δt is defined in advance as a constant, and based on the skew amount D, the vibration frequency fL of the L side actuators 17a, 18a, the total amplitude aL, and the correction amplitude aL ', R Δt = D / | aL'-aR | f with the vibration frequency fR of the actuators 17b and 18b on the side, total amplitude aR, and amplitude aR 'at the time of correction as parameters. aL '> aR Δt = D / | aR'-aL | f However, skew correction is performed by aR'> aL for L leading and aR '<aL for R leading.

After the above control is carried out, the sheet 4 is conveyed by the conveying roller systems 24 and 25, and the control circuit 23 judges that the feeding is completed (step S10).
23 determines whether or not the number of separated sheets fed out reaches the designated number. If not, the process from step S1 is repeated, and if reached, the process ends (step S1).
1). If the designated number is not reached, the separating operation is repeated again, and if the designated number is separated, the separation feeding is completed.

In the above-described embodiment, the sheet 4 horizontally stacked in the storage section 1 is described as an apparatus for feeding the sheet 4 from above, but the apparatus for feeding the sheet 4 from the bottom or the sheet in the storage section 1 is described. It is also applicable to a device in which 4 are vertically stacked and fed from the left or right.

Next, a second embodiment of the paper feeding device according to the present invention will be described with reference to FIGS. In these figures, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The second embodiment is different from the first embodiment in that the reverse rollers 20a, 20b for separating the paper sheet 4 when the paper sheet 4 is fed out are driven separately on the left and right sides.
It is provided with reverse arms 30a and 30b which rotate together with 20b and separate and feed out the paper sheet 4 and then return the paper sheet dragged at the time of delivery to the storage section 1 side to align them.

More specifically, reverse motors 31a and 31b are installed near the left and right end portions below the guide plate 2 in front of the front end frame 1a of the storage section 1. These reverse motors 31a and 31b are driven separately, and always apply a rotational force to the reverse motors 20a and 20b in a direction opposite to the feeding direction. In other words, these reverse motors 31a and 31b rotate the reverse rollers 20a and 20b in the reverse direction until the number of sheets becomes 1 when the double feeding of the sheets occurs during the separation and feeding, respectively. The left and right reverse rollers 20a, 20b are used independently until there are no double-fed paper sheets, that is, until one paper sheet is left.
It is designed to rotate 20a and 20b. These reverse motors 31a and 31b are independent of each other on the left and right, so even if one of the reverse motors is not double-fed, if the other is double-fed, rotate the reverse roller 20a or 20b on the double-feed side to It is designed so that it will not stop in the double-feed skew condition.

The reverse motors 31a and 31b are mounted on the long plate-shaped motor brackets 32a and 32b formed of a flexible member such as rubber so as to be slightly closer to the center side. The motor brackets 32a, 32b are formed wider and longer than the respective reverse motors 31a, 31b, and the end portions on which the motors 31a, 31b are not mounted are fixed by attachments 33a, 33b. These attachments 33a and 33b are formed in a substantially L shape as shown in FIG. 8 and are fixed by welding or the like so that their hanging parts come into contact with the front surface of the front end frame 1b. The long pieces of these attachments 33a, 33b extend along the guide plate 2 and are fixed so as to abut the lower surfaces of the motor brackets 32a, 32b, respectively.
It supports 32a and 32b.

On the other hand, the rotary shafts (shafts) 34a, 34b of the reverse motors 31a, 31b respectively extend toward the central portion along the front end of the accommodating portion 1, and their ends are attached to the support brackets 35a, 35b. Each is rotatably supported via bearings. Reverse shafts 20a, 20b are provided on these shafts 34a, 34b so as to face the feed rollers 13a, 13b.
Are attached respectively, and reverse arms 30a, 30b are arranged on their sides, respectively. These reverse arms 30a, 30b are composed of a shaft portion having a diameter smaller than that of the reverse rollers 20a, 20b, and a pair of members extending radially and rotationally from the shaft portion and extending to approximately the same diameter as the reverse rollers 20a, 20b. And a blade portion of. These reverse arms 30a, 30b are each made of an elastic member such as rubber, and when rotated, are deformed and rotated by centrifugal force so that the curved blades extend.

The support brackets 35a, 35b are provided with support rod portions extending downward, and the end portions of these support rod portions are
The actuators 36a and 36b, which are electromagnetic magnets and the like, are connected to each other. These actuators 36a, 36b
Is a structural member fixed to the front end frame 1b of the storage section 1 and the like.
It is fixed on 37 and moves up and down the support brackets 35a, 35b when driven. These actuators 36a and 36b are normally driven upwards to drive the shaft 34
The ends of a and 34b are pushed upward, and after feeding the paper, the support brackets 35a and 35b are respectively lowered and the shaft 34
The ends of a and 34b are pulled downward.

In such a structure, similarly to the first embodiment, the pickup rollers 9a, 9b and the feed rollers 13a, 13b are repeatedly moved by the driving of the actuators 17a-18b, and the papers are sequentially transferred from the storage section 1. Leaf 4 is paid out. If a double feed occurs in which other paper sheets are closely attached to the paper sheet that is fed out during the separation and feeding, and the reverse rollers 20a and 20b are driven by the reverse motors 31a and 31b, respectively.
By the rotation drive of, the sheet is rotated in the direction opposite to the feeding direction until the number of sheets becomes one. In this case, the left and right reverse rollers 20a, 20b are left and right independently of each other until there are no double-fed paper sheets, that is, until one paper sheet is left.
a and 20b rotate. Since the reverse rollers 20a and 20b are driven independently of each other, the reverse rollers 20a or 20b on the multi-feed side rotate when one of the reverse rollers is not multi-feeding but the other is multi-feeding. Therefore,
In the second embodiment, neither the left side nor the right side of the sheet is stopped in the skew double feeding state. Next, when the separation / feeding is completed, the controller detects that the stage 3 is moving downward, and actuates the actuators 36a and 36b. As a result, the support brackets 35a and 35b are respectively sucked, and the ends of the shafts 33a and 33b are respectively lowered. As a result, the ends of the motor brackets 32a and 32b are bent and the reverse rollers 20a and 20b are separated from the feed rollers 13a and 13b. At this time, the load applied to the reverse rollers 20a, 20b by the feed rollers 13a, 13b is reduced or eliminated.
20a and 20b start rotating at high speed in the reverse direction. At the same time, the reverse arms 30a, 30b rotate at a high speed, and their blade members rise up so as to extend due to centrifugal force. As a result, the paper sheet remaining between the feed rollers 13a, 13b and the reverse rollers 20a, 20b is sent back to the storage unit 1 side, and the leading ends of these paper sheets are reversed by the reverse arm 30.
By repeatedly hitting the blade members a and 30b, the front ends of the paper sheets are aligned in the storage unit 1.

When the separate sheet feeding is started again, the actuator
The driving of 36a, 36b is released, the support brackets 35a, 35b are opened, and the respective restoring shafts of the motor brackets 32a, 32b return the respective shafts 34a, 34b to the horizontal position. When the actuators 36a and 36b are further driven, the support brackets 35a and 35b are
When b is pushed upward, the reverse rollers 20a and 20b come into pressure contact with the feed rollers 13a and 13b. After that, the stage 3 moves up and the separating and feeding operation is started again.

However, according to the paper feeding device of the second embodiment, the reverse rollers 20a and 20b are driven independently to the left and right in order to surely return the double-fed paper generated during the separation and feeding, and After separating and feeding, the feed roller 13a,
13b, the reverse rollers 20a, 20b are separated until the paper sheet clamped between the rollers is in a free state, and when separated, the reverse arm 30a, which rotates at high speed to extend the blade member,
Since the residual paper sheets are sent back and aligned by 30b, it is possible to send back excess paper sheets that are not needed for paper feeding, and moreover, the double-fed paper sheets that have occurred during separate paper feeding are double-fed in a skewed state. It is expected that it will be possible to send it back regardless.

In the second embodiment, the motor brackets 32a, 32b for accommodating the reverse motors 31a, 31b.
Normally, the reverse rollers 20a, 20b are flexible so that they become horizontal, but the reverse rollers 20a, 20b may normally be biased so as to be pressed against the feed rollers 13a, 13b. In this case, the actuator 36 need only drive the reverse rollers 20a, 20b downward after separation, and does not need to drive upward. Also, motor bracket
32a, 32b may normally bias the reverse rollers 20a, 20b away from the feed rollers 13a, 13b, in which case the actuators 36a, 36b will normally push the support brackets 35a, 35b upwards. Alternatively, it may be driven to, and then released after the feeding. Further, although an electromagnetic magnet is used as an actuator that moves the support brackets 35a and 35b up and down, it goes without saying that the same applies when a lead screw type actuator or the like is used.

[0053]

As described above, according to the paper feeding device and control method of the present invention, the following respective effects can be achieved. (1) Since the first and second feeding means and the second feeding means move in the feeding direction in a state of being in contact with the paper surface, the paper sheet is fed out, so that the paper sheet is squeezed during the feeding. Since the paper is fed out in a high degree, a high separability of the fed paper can be obtained, and an excellent effect that the paper can be easily separated even if the paper is relatively strongly adhered is obtained. (2) For the first feeding means and the second feeding means, a linear drive actuator can be used without using a conventional rotary type motor for driving them, and in general, a linear drive actuator is small in size. Since the device can be obtained, the device can be downsized, and the belt, the pulley, and the like can be omitted, so that the device can be downsized and the structure can be simplified. (3) Since it is sufficient that the second feeding means and the separating means are constantly in pressure contact with each other at the time of feeding, it is not necessary to adjust the engaging amount of the feed roller and the reverse roller as in the conventional case, and it is always possible to perform simple maintenance. It is also possible to obtain the effect that the paper can be reliably separated and fed out. (4) The first feeding means and the second feeding means are brought close to each other,
By independently controlling the separating operation, that is, the repeating period, the movement amplitude, and the phase of both means, it is possible to easily control the sheet feeding and to expect an effect that vibration, noise and the like are reduced. (5) In the case where the separating means is provided with reverse rollers that are independently controlled and driven, and a reverse arm that rotates together with the reverse rollers, and is configured to be separated from the second feeding means after being fed, this occurs at the time of separate feeding. The reverse roller drives the left and right independently to reliably return the double-fed paper, and after separating and feeding, the reverse roller is released until the clamped paper leaves are in a free state, and the reverse roller rotates at high speed when separated. Since the residual paper sheets are sent back by the reverse arm added to the above to align these residual paper sheets on the storage side, it is possible to send back excess paper sheets that are not necessary for paper feeding, and also occurred during separate paper feeding. It is expected that it will be possible to send back the double-fed paper sheets regardless of the double-feeding in the skewed state. In addition, the structure is simplified, and the effects of cost reduction and reliability improvement are expected. (6) According to the control method of the present invention, the roller moving means brings the pickup roller and the feed roller close to each other,
The paper sheet is fed out from the storage portion by the separating operation, and both side edges of the fed paper sheet are continuously detected within a predetermined range, and the chain, delay, and delay of the paper sheet are detected based on the detection information of the detection means. By determining the presence or absence of skew, the amplitude of the left and right roller moving means is decreased or stopped when a chain is generated, and the amplitude of the left and right roller moving means is increased when a delay occurs. When it is determined that the skew has occurred, the separation and feeding state of the paper sheet is individually controlled for each paper sheet in order to control the amplitude of at least one of the left and right roller moving means to increase or decrease. It is possible to control, and it is possible to obtain the effect that it is possible to eliminate the variation in separation and delivery as in the past. (7) Since the separation and feeding state is determined and controlled for each sheet, it is possible to control in real time for each sheet, and the control is easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a sheet feeding device according to the present invention.

FIG. 2 is a side view of a main part of the apparatus shown in FIG.

FIG. 3 is a block diagram showing an example in which a control system is included in the device according to the first embodiment.

FIG. 4 is an operation process chart for explaining the operation of the first embodiment shown in FIGS.

FIG. 5 is a flow chart showing a method of controlling the apparatus of the first embodiment shown in FIGS.

FIG. 6 is an explanatory diagram showing real-time control in the control method of FIG.

FIG. 7 is a perspective view showing a second embodiment of the paper feeding device according to the present invention.

8 is a side view of the main part of the apparatus shown in FIG.

[Explanation of symbols]

 8a, 8b Absorber roller 9a, 9b Pickup roller 11a, 11b, 15a, 15b Roller bracket 13a, 13b Feed roller 17a, 17b, 18a, 18b Actuator 20a, 20b Reverse roller 22a, 22b Line photo sensor 23 Control circuit 30a, 30b Reverse Arm 31a, 31b Reverse motor 32a, 32b Motor bracket 35a, 35b Support bracket 36a, 36b Actuator

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65H 7/18 7456-3F

Claims (11)

[Claims] 1. A paper feeding device for feeding a large number of paper sheets accumulated and stored in a storage portion one by one in a feeding direction substantially orthogonal to the stacking direction from one side of the paper sheets, Pressing means for pressing the stacked and stored paper sheets to one side in the stacking direction, and one surface of the paper sheets pressed to one side by the pressing means to contact the one side. A first feeding means for pulling the paper sheet on one side out of the accumulated paper sheets by repeatedly moving along the side surface in the feeding direction, and a downstream side in the feeding direction than the first feeding means. Is disposed on the side, contacts the paper sheet pulled out by the first feeding means, guides the movement of the first feeding means, and further moves in the feeding direction, thereby storing the paper sheet. From the department to the feeding path A second feeding means for feeding and a second feeding means arranged so as to face the second feeding means, contacting the other side of the sheet to be fed in close contact with the back side of the fed sheet, and the feeding direction is opposite. A sheet feeding device, comprising: a separating unit that separates other sheets that come into close contact with the sheet to be fed by rotating in a direction. 2. The paper feeding device according to claim 1, wherein the first feeding means is substantially orthogonal to the feeding direction on a surface of one side of the paper which is pressed to one side by the pressing means. A pair of pickup rollers arranged at predetermined intervals in the direction, and roller moving means for repeatedly moving the pickup rollers along the feeding direction, wherein the pickup roller is moved in the feeding direction by the roller moving means. A paper feeding device, characterized in that when the paper moves, its rotation is regulated and the abutting paper is pulled out, and when returning in a direction opposite to the paper feeding direction, the paper is rotated and returned on the paper surface in the moving direction. 3. The sheet feeding device according to claim 2, wherein the roller moving means supports the rotation axis of the pickup roller while restricting the rotation axis of the pickup roller in only one direction, and the supporting means. A linear drive actuator for repeatedly moving the pickup roller in the feeding direction by linearly reciprocating along the feeding direction, the actuator being capable of changing the movement amplitude of the supporting means and its repetition cycle at any time. A paper feeding device characterized in that 4. The paper feeding device according to claim 1, wherein the second feeding means is arranged on one surface of the paper fed by the first feeding means in a direction substantially orthogonal to the feeding direction. When a pair of feed rollers arranged at a predetermined interval and roller moving means for repeatedly moving the feed rollers along the feeding direction are provided, and the feed rollers move in a direction opposite to the feeding direction. A sheet feeding device, wherein the sheet feeding device rotates in that direction and its rotation is restricted when returning to the feeding direction. 5. The sheet feeding device according to claim 4, wherein the roller moving means feeds the supporting means while supporting the rotation shaft of the feed roller while restricting the rotation shaft to one direction. A linear drive actuator that moves the feed roller by linearly reciprocating along a direction, the actuator comprising:
A paper feeding device, wherein the movement amplitude of the supporting means and its repetition cycle can be changed at any time. 6. The sheet feeding device according to claim 1, wherein the first feeding means is substantially orthogonal to the feeding direction on a surface of one side of the sheet that is pressed to one side by the pressing means. A pair of pickup rollers arranged at predetermined intervals in the direction, and roller moving means for repeatedly moving the pickup rollers along the feeding direction, wherein the second feeding means is downstream of the feeding surface. A pair of feed rollers arranged parallel to the pickup roller on the side, and roller moving means for repeatedly moving the feed rollers in the feeding direction, and a roller moving means of the first feeding means. The pickup roller and the feed roller are interlocked with each other by the roller moving means of the second feeding means. Sheet feeding device, characterized in that to move the respective roller so as to repeat approaching and spaced. 7. The sheet feeding device according to claim 6, wherein the roller moving means of each of the feeding means extends in a straight line in the feeding direction such that the pickup roller and the feed roller are parallel to each other. It is provided with supporting means for supporting each roller and an actuator for moving the pickup roller and the feed roller toward and away from each other by expanding and contracting the pickup roller support means and the feed roller support means in opposite directions. Paper feeding device. 8. The sheet feeding device according to claim 1, wherein the pressing means is in contact with the surface of the other side of the stacked sheets arranged to face the first feeding means. A sheet feeding device comprising an absorber roller rotatable in a feeding direction. 9. The sheet feeding device according to claim 1, wherein the separating means is arranged so as to face the feeding surface with the second feeding means and is opposite to the feeding direction. A pair of reverse rollers that rotate in the same direction, and a pair of reverse arms that rotate with the reverse rollers and align the paper sheets returned to the stacking position by the reverse rollers to the stacking position. A sheet feeding device characterized in that each side is independently driven. 10. The paper feeding device according to claim 9, wherein the separating means presses the pair of reverse rollers against the second feeding means at the time of feeding the paper, and after the paper feeding, A sheet feeding device comprising roller contacting / separating means for slightly separating a pair of reverse rollers from the second feeding means. 11. A pressing means for pressing a large number of paper sheets accumulated in a storage section toward one side in the stacking direction, and a pair of pickup rollers abutting against one side of a large number of paper sheets pressed by the pressing means. A pair of feed rollers arranged at a feeding position in parallel with the pickup roller, roller moving means for repeatedly moving the feed roller and the pickup roller so as to approach and separate from each other, and arranged to face the feed roller. And a reverse roller that rotates in a direction opposite to the feeding direction, and the pickup roller and the feed roller are repeatedly approached and separated from each other, whereby the one-sided sheet of the stacked sheets is fed out, and the reverse side thereof is fed. The other paper sheet that is going to be closely fed is separated and returned by the rotation of the feed roller in the opposite direction to return the paper sheet. In a control method of a sheet feeding device that sequentially feeds one sheet at a time, the control method continuously detects both side end portions of a sheet fed by the pickup roller and the feed roller within a predetermined range, and performs the detection. Based on the result, the presence / absence of paper chain, delay, and skew is determined, and if the determination result is a chain, the movement amplitude of each roller by the roller moving means is reduced or temporarily stopped, and If the determination result is a delay, the movement amplitude of each roller by the roller moving means is increased, and if the determination result is a skew, one of the pair of rollers of each roller is determined by the roller moving means. A method of controlling a sheet feeding device, characterized in that the movement amplitude on one side is decreased or increased.