JP2018203399A - Paper sheet reversing mechanism, paper sheet front and back arranging device, and paper sheet processing machine - Google Patents

Abstract

To reduce a change in a conveying pitch caused by a change in a length of a paper sheet.SOLUTION: A paper sheet reversing mechanism 153 has a stopper 22 that contacts a front end of the paper sheet and a moving mechanism 23 that moves the stopper 22. The moving mechanism 23 moves the stopper 22 to a first position P1 when switching back a first paper sheet B1, and moves the stopper 22 to a second position P2 when switching back a second paper sheet B2. Difference between distance from the stopper 22 positioned at the first position P1 to an inlet 21a and distance from the stopper 22 positioned at the second position P2 to the inlet 21a is smaller than difference between a first length L1 and a second length L2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a paper sheet reversing mechanism, a paper sheet front / back arrangement device, and a paper sheet processing machine.

  In an apparatus (paper sheet processing machine) that processes paper sheets such as banknotes, a switchback mechanism is used to align the front and back of the paper sheets. The switchback mechanism receives the conveyed paper sheet, conveys the paper sheet in the reverse direction, and sends it out, thereby reversing the front and back of the paper sheet.

JP 2001-192160 A Japanese Patent No. 4641655 Japanese Patent No. 4300072

  The switchback mechanism described above has the following problems. When the size of the paper sheet in the transport direction changes, the time required to pass through the switchback mechanism changes. If it does so, the conveyance pitch (interval of paper sheets) in the paper sheets conveyed continuously will change.

  In the apparatus of Patent Document 1, the control unit moves the switchback unit (3) according to the length of the paper sheet, and adjusts the distance between the switchback unit (3) and the branch roller (6). To do. Thereby, the gap fluctuation between the paper sheets before and after the switchback can be reduced. However, Patent Document 1 does not disclose a specific method as to how much the switchback portion can be moved to reduce the gap fluctuation.

  In the apparatus of Patent Document 2, the presser plate (16) is moved to an appropriate position according to the width of the paper sheet (length in the transport direction) by the step motor (20). The appropriate position of the press plate (16) in Patent Document 2 is a position where the distance between the paper sheet regulating member (press plate (16)) and the feeding / feeding means (8) is shorter than the length of the paper sheet. It is. As a result, the apparatus disclosed in Patent Document 2 enables reliable reversal according to the width of the paper sheet. Therefore, the apparatus of Patent Document 2 does not solve the problem of change in the conveyance pitch.

  In the apparatus of Patent Document 3, when the conveyance pitch deviation is detected, the conveyance pitch of the paper sheet is corrected by setting (changing) the conveyance speed of the conveyance roller. Specifically, according to the transport pitch deviation time, the switchback control means rotates the transport roller in the normal direction and loads it into the reversing section, the capture speed when decelerating after capture, and the stop time when stopping after deceleration , And the rotation speed when feeding the paper sheet by reversing the conveying roller. The apparatus of Patent Document 3 has a problem in that complicated control is required for correcting the transport pitch.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to reduce a change in conveyance pitch due to a change in the length of a paper sheet.

[Configuration 1]
The characteristic configuration of the paper sheet reversing mechanism for achieving the above object is as follows:
A paper sheet reversing mechanism that reverses the front and back of a paper sheet,
A switchback part that switches back the paper sheets introduced from the inlet and discharges it from the outlet;
A stopper that is disposed at the switchback portion and contacts the leading edge of the paper sheet when the paper sheet switches back;
A moving mechanism for moving the stopper,
A paper sheet having a first length along the transport direction when introduced into the switchback portion is a first paper sheet, and a length along the transport direction is a second length. As the second paper sheet, the second length is smaller than the first length,
The moving mechanism moves the stopper to the first position when switching back the first paper sheet,
When switching back the second paper sheet, the stopper is moved to the second position,
The difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. The point is smaller than the difference.

  According to the above characteristic configuration, the difference between the time required for the first paper sheet to pass through the switchback portion and the time required for the second paper sheet to pass through the switchback portion is determined by the conventional switchback. It can be made smaller than the mechanism. Thereby, the conveyance pitch change when the length of paper sheets changes can be made small.

[Configuration 2]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
The difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. The difference is 0.4 to 0.6 times the difference in thickness.

  According to the above characteristic configuration, the difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. When the length difference is 0.4 times or more and 0.6 times or less, the change in the conveyance pitch when the length of the paper sheet is changed can be further reduced.

[Configuration 3]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
The difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. The point is half the difference.

  According to the above characteristic configuration, the difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. By being half the difference in thickness, it is possible to further reduce the change in the transport pitch when the length of the paper sheet changes.

[Configuration 4]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
It has a sending means which is arranged at the switchback part and feeds the rear end of the paper sheet contacting the stopper toward the outlet.

  According to the above characteristic configuration, since the sending means sends the rear end of the paper sheet toward the outlet, the paper sheet is reliably conveyed at the switchback portion.

[Configuration 5]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
The delivery means is an impeller.

  According to said characteristic structure, sending of paper sheets can be performed more smoothly by rotation of an impeller.

[Configuration 6]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
The impeller has a blade extending radially from a central axis, and the blade is in contact with a rear end of the paper sheet and feeds the paper sheet.

  According to the above characteristic configuration, since the radially extending blades feed out the paper sheets, the paper sheets can be sent out more smoothly.

[Configuration 7]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
The guide member is disposed at the switchback portion and guides the movement of the rear end of the paper sheet.

  According to said characteristic structure, since a guide member guides the movement of the rear end of paper sheets, the conveyance attitude | position of paper sheets in a switchback site | part is stabilized, and is suitable.

[Configuration 8]
Another characteristic configuration of the paper sheet reversing mechanism according to the present invention is:
The stopper has a contact surface that contacts the leading edge of the paper sheet, and the contact surface is inclined with respect to the moving direction of the paper sheet.

  According to the above characteristic configuration, the contact surface is inclined with respect to the moving direction of the paper sheet, so that the leading edge of the paper sheet is guided along the inclination. The posture is stable and suitable.

[Configuration 9]
The characteristic configuration of the paper sheet front and back assembling apparatus for achieving the above object is as follows:
A paper sheet front / back arrangement device that reverses the front and back sides of the paper sheets and prepares the front and back sides of the paper sheets,
An introduction conveyance path for conveying paper sheets at a predetermined interval;
A detection unit that is provided in the introduction conveyance path and detects the front-side and reverse-side of the paper sheet and the length of the paper sheet in the conveyance direction;
A reversing passage that conveys one of the front-facing paper sheet and the back-facing paper sheet, and reverses the front and back of the paper sheet;
A non-reversing passage for conveying the other of the front-facing paper sheets and the back-facing paper sheets without reversing the front and back;
A lead-out conveyance path for conveying the paper sheets from the reversing path and the paper sheets from the non-reversing path,
The paper sheet reversing mechanism is disposed in the reversing path.

  In a paper sheet front and back assembling apparatus having a reversing path and a non-reversing path, the time required for the paper sheet to pass through the reversing path differs from the time required for the paper sheet to pass through the non-reversing path. Then, the conveyance pitch of the paper sheet derived from the paper sheet front and back assembling apparatus changes. When the conventional switchback mechanism is used for the reversing path, the time required for the paper sheets to pass through the reversing path greatly varies depending on the length of the paper sheets. It was difficult to reduce the change in conveyance pitch. When the conveyance pitch changes, there is a possibility that an error occurs in which the sheets conveyed continuously are overlapped. Further, in order to stabilize the processing, it is necessary to increase the conveyance pitch, and it is difficult to improve the processing speed.

  According to the above characteristic configuration, since the paper sheet reversing mechanism is disposed in the reversing path, the time required for the first paper sheet to pass through the reversing path and the second paper sheet pass through the reversing path. The difference in time required to pass through can be made smaller than in conventional devices. Thereby, the conveyance pitch change resulting from the length change of the paper sheets in a paper sheet front-and-back arrangement apparatus can be reduced. Therefore, it is possible to reduce processing errors in the sheet front and back assembling apparatus. In addition, the transport pitch can be made smaller than before, and the processing speed can be improved.

[Configuration 10]
In the case of a paper sheet processing machine having the above-mentioned paper sheet front and back assembling apparatus, a change in the conveyance pitch due to a change in the length of the paper sheet is reduced, thereby reducing processing errors in the paper sheet processing machine. In addition, the processing speed can be improved.

[Configuration 11]
The characteristic configuration of the paper sheet reversing mechanism for achieving the above object is as follows:
A paper sheet reversing mechanism that reverses the front and back of a paper sheet,
It has a switchback part that switches back paper sheets introduced from the inlet and discharges it from the outlet,
A paper sheet having a first length along the transport direction when introduced into the switchback portion is a first paper sheet, and a length along the transport direction is a second length. As the second paper sheet, the second length is smaller than the first length,
The distance between the leading edge of the first paper sheet and the inlet when the first paper sheet switches back, and the leading edge of the second paper sheet when the second paper sheet switches back And the distance between the inlet and the entrance is smaller than the difference between the first length and the second length.

  According to the above characteristic configuration, the difference between the time required for the first paper sheet to pass through the switchback portion and the time required for the second paper sheet to pass through the switchback portion is determined by the conventional switchback. It can be made smaller than the mechanism. Thereby, the conveyance pitch change when the length of paper sheets changes can be made small.

Schematic showing the configuration of the paper processing machine Block diagram showing the configuration of the paper sheet processing machine Schematic showing the structure of the paper sheet front / back arrangement device Schematic diagram showing the structure of the paper sheet reversal mechanism The figure which shows the state in which 1st paper sheets pass a paper sheet inversion mechanism (state ST01) The figure which shows the state in which 1st paper sheets pass a paper sheet inversion mechanism (state ST02) The figure which shows the state in which 1st paper sheets pass a paper sheet inversion mechanism (state ST03) The figure which shows the state in which 1st paper sheets pass a paper sheet inversion mechanism (state ST04) The figure which shows the state through which 2nd paper sheets pass a paper sheet inversion mechanism (state ST05) The figure which shows the state through which 2nd paper sheets pass a paper sheet inversion mechanism (state ST06) The figure which shows the state through which 2nd paper sheets pass a paper sheet inversion mechanism (state ST07) The figure which shows the state in which 2nd paper sheets pass a paper sheet inversion mechanism (state ST08) The figure which shows the state through which 2nd paper sheets pass a paper sheet inversion mechanism (state ST09) The figure which shows the state in which 2nd paper sheets pass a paper sheet inversion mechanism (state ST10) The figure which shows the state in which 2nd paper sheets pass a paper sheet inversion mechanism (state ST11) The figure which shows the state through which 2nd paper sheets pass a paper sheet inversion mechanism (state ST12)

<Paper sheet processing machine>
Hereinafter, the paper sheet processing machine according to the present embodiment will be described with reference to the drawings. The paper sheet processing machine 1 is an apparatus that takes in paper sheets, stores the paper sheets therein, and discharges the paper sheets in a state where the front and back surfaces are aligned according to the operation of the operator. The paper sheet processing machine 1 is, for example, a money deposit / withdrawal machine used in a bank or a store. The money depositing and dispensing machine is a device that deposits banknotes (an example of paper sheets), stores the deposited banknotes inside, and dispenses the banknotes in a state where the front and back sides are aligned according to the operation of the operator.

  As shown in FIG. 1, the paper sheet processing machine 1 includes a take-in unit 110, a discharge unit 120, a reject unit 130, a transport unit 140, and a front / back assembling unit 150 (front and back paper sheets). An example of an aligning device), a detection unit 160, a left-right reversing unit 170, a cassette 180, a first storage unit 190, a stacker 200, and a second storage unit 210.

  The take-in unit 110 takes in paper sheets inserted by the operator and sends them out to the transport unit 140. The discharge unit 120 receives and holds paper sheets fed from the stacker 200 and the like and conveyed by the conveyance unit 140. The reject unit 130 receives the abnormal paper sheets detected by the detection unit 160 from the transport unit 140 and holds them. The paper sheets held in the discharge unit 120 and the reject unit 130 are taken out by the operator.

  The conveyance unit 140 includes a belt, a roller, and the like, and conveys paper sheets. The conveyance unit 140 includes a main conveyance path 141, a first intake conveyance path 142, a discharge conveyance path 143, a reject conveyance path 144, a cassette conveyance path 145, a stacker conveyance path 146, and a second intake conveyance path 147. In the present embodiment, the transport unit 140 transports rectangular paper sheets in a posture in which the short side is parallel to the transport direction. That is, the length of the paper sheet in the conveyance direction is the length of the paper sheet in the short side direction. Hereinafter, the length of the paper sheet in the conveyance direction may be simply referred to as “length”.

  The main conveyance path 141 is a conveyance path formed in a loop shape, and is arranged in an inverted L shape extending in the front-rear direction and the vertical direction of the housing 10. The main transport path 141 can transport paper sheets in both the clockwise direction (the direction of the solid arrow) and the counterclockwise direction (the direction of the dashed arrow) in FIG. In the middle of the main conveyance path 141, the front / back arrangement unit 150 is arranged.

  The first take-in conveyance path 142 is disposed between the take-in unit 110 and the main conveyance path 141, and takes out paper sheets from the take-in part 110 to the main conveyance path 141.

  The discharge conveyance path 143 is disposed between the discharge unit 120 and the main conveyance path 141, and sends out paper sheets from the main conveyance path 141 to the discharge unit 120.

  The reject conveyance path 144 is disposed between the reject unit 130 and the main conveyance path 141, and feeds paper sheets from the main conveyance path 141 to the rejection unit 130.

  The cassette conveyance path 145 is disposed between the cassette 180 and the first holding unit 190 and the main conveyance path 141, and the sheets are bidirectionally transferred between the cassette 180, the first reservation unit 190 and the main conveyance path 141. Transport.

  The stacker transport path 146 is disposed between the stacker 200 and the second storage unit 210 and the main transport path 141, and allows the sheets to be bidirectionally transferred between the stacker 200, the second storage unit 210 and the main transport path 141. Transport.

  The second intake conveyance path 147 branches from the main conveyance path 141 and merges with the main conveyance path 141 via the left-right reversing unit 170.

<Front / Back Ordering Unit (Paper Sheet Front / Back Ordering Device)>
The front / back arrangement unit 150 (an example of a paper sheet front / back arrangement device) is disposed in the main conveyance path 141 and constitutes a part of the main conveyance path 141. The front / back arrangement unit 150 aligns the front and back of the paper sheet conveyed to the main conveyance path 141.

  The front / back arrangement unit 150 includes an introduction conveyance path 151, an inversion path 152, a non-inversion path 154, a lead-out conveyance path 155, and a detection unit 160. A paper sheet reversing mechanism 153 is disposed in the reversing path 152.

  The introduction conveyance path 151 conveys paper sheets and passes the detection unit 160. The introduction conveyance path 151 branches into a reversing passage 152 and a non-reversing passage 154 at a branching portion 156.

  The reversing path 152 conveys the paper sheet, and the paper sheet reversing mechanism 153 reverses the front and back. The reverse passage 152 is connected to the lead-out conveyance path 155 at the junction 157.

  The non-inversion path 154 conveys paper sheets without inverting the front and back. The non-inversion path 154 is connected to the lead-out conveyance path 155 at the junction 157.

  The lead-out conveyance path 155 merges and conveys the paper sheets from the reversing path 152 and the paper sheets from the non-reversing path 154, and guides the paper sheets from the front / back collecting unit 150 to the main conveyance path 141. .

  The introduction conveyance path 151 conveys paper sheets at a predetermined interval and passes the detection unit 160. The introduction conveyance path 151 sends the paper sheets to the reversing path 152 or the non-reversing path 154 based on the detection result of the detection unit 160.

  The detection unit 160 is provided in the introduction conveyance path 151. The detection unit 160 may identify the authenticity and type of the paper sheet, the length in the transport direction, the distinction between the front side and the back side, and the right side and the left side (hereinafter collectively referred to as “paper sheet attributes”). .) Is detected. The detection result by the detection unit 160 is output to the control unit 13 described later.

  With the above-described configuration, the front / back collecting unit 150 determines whether one of the front-facing paper sheet and the back-facing paper sheet is the reverse path 152 based on the front / back discrimination of the paper sheet detected by the detecting section 160. And the other side is conveyed by the non-reversing passage 154. In this way, the front / back arrangement unit 150 arranges the front and back of the paper sheets.

  The difference between the time required for the paper sheets to pass through the reversing passage 152 and the time required for the paper sheets to pass through the non-reversing passage 154 is preferably as small as possible. When the difference between these two times is large, even if the paper sheets are introduced into the front / back collecting unit 150 at equal intervals, the merge section 157 is not connected between the front paper sheets and the reverse paper sheets. The arrival timing is different. If it does so, the space | interval of the paper sheets derived | led-out from the front and back procurement part 150, ie, a conveyance pitch, will change a lot.

  In order to suppress a change in the conveyance pitch, the front / back arrangement unit 150 according to the present embodiment is configured such that the conveyance distance and conveyance speed of the paper sheets are equal between the non-inversion path 154 and the inversion path 152. ing. In addition, in the paper sheet reversing mechanism 153 according to the present embodiment, the position of the stopper 22 of the switchback portion 21 is controlled so that the change in the transport pitch is suppressed even when the length of the paper sheet changes. . With the configuration described above, in the front and back side procurement unit 150 (paper front and back side arrangement device) and the paper sheet processing machine 1 according to the present embodiment, the change in the conveyance pitch of the paper sheets is suppressed, and the occurrence of processing errors is suppressed. Is done. In addition, the transport pitch can be further reduced, and the processing speed can be improved.

  The left-right reversing unit 170 is disposed in the second intake conveyance path 147 and constitutes a part of the second intake conveyance path 147. The left / right reversing unit 170 includes a spiral conveyance path 171.

  The spiral conveyance path 171 is a conveyance path formed in a spiral shape. The spiral conveyance path 171 inverts the left and right sides and the front and back sides of the conveyed paper sheet. Specifically, the spiral conveyance path 171 rotates the paper sheet 180 degrees around an axis located at the center of the paper sheet and parallel to the short side, thereby reversing the right and left and the front and back of the paper sheet.

  In the present embodiment, two cassettes 180 and three stackers 200 are provided in the casing 10 below the transport unit 140 and arranged side by side. Two cassettes 180 are provided in front of the three stackers 200. A left-right reversing unit 170 is located behind the last stacker 200.

  The cassette 180 is detachable from the housing 10, and can be taken in and out of the housing 10 by opening a door (not shown) provided at the lower front of the housing 10. The cassette 180 is mainly used for storing paper sheets collected from the stacker 200 and paper sheets to be replenished to the stacker 200. The cassette 180 may be used for temporarily storing paper sheets. In the cassette 180, paper sheets are stored so as to be stacked one above the other. The front cassette 180 becomes the first cassette 181 and the rear cassette 180 becomes the second cassette 182.

  The first holding unit 190 for the cassette 180 is disposed above the corresponding cassette 180. The first holding unit 190 temporarily holds paper sheets stored in the cassette 180. A feeding mechanism (not shown) is provided on the entrance / exit side of the first holding unit 190, and the sheets in the cassette 180 can be fed out to the cassette conveyance path 145 through the first holding unit 190.

  The stacker 200 is used to store paper sheets taken into the paper sheet processing machine 1 by type. For example, when the paper sheet is a banknote, denominations of 10,000 yen, 1,000 yen, and 5,000 yen can be assigned to each of the three stackers 200. The number of stackers 200 may be increased or decreased according to the number of types of paper sheets. For example, when the paper sheets are euro banknotes, the paper sheet handling machine 1 may have six stackers in accordance with six types of euro banknotes. In the stacker 200, banknotes are stored so as to be stacked up and down.

  The second storage unit 210 for the stacker 200 is disposed above the corresponding stacker 200. The second holding unit 210 temporarily holds paper sheets stored in the stacker 200. A feeding mechanism (not shown) is provided on the entrance / exit side of the second holding unit 210, and the sheets in the stacker 200 can be fed out to the stacker conveyance path 146 through the second holding unit 210.

  As shown in FIG. 2, the sheet processing machine 1 includes a control unit 13, a storage unit 14, and an operation display unit 15 in addition to the configuration described above.

  The control unit 13 includes an arithmetic circuit such as a CPU (Central Processing Unit), and in accordance with an operation program stored in the storage unit 14, each component unit (the conveyance unit 140, the front / back arrangement unit 150, The detection unit 160, the left-right reversing unit 170, the cassette 180, the first holding unit 190, the stacker 200, the second holding unit 210, and the like). The storage unit 14 includes a storage medium such as a ROM (Read Only Memory), a RAM (Random Access Memory), and a hard disk, stores an operation program of the control unit 13, and a work area during the control process of the control unit 13. Used as

  The operation display unit 15 includes a touch panel that includes a display and a touch sensor. The operation display unit 15 displays various images (screens) on the display, and detects a touch operation of the operator on the display by a touch sensor. The operation display unit 15 is provided, for example, at the front end of the upper surface of the housing 10.

<Uptake processing and discharge processing>
Next, a paper sheet take-in process and a paper discharge process performed by the paper sheet processing machine 1 will be described.

  When the operator inserts a sheet into the take-in unit 110 and performs an operation for instructing the take-in process, the take-in process is started. The control unit 13 feeds paper sheets one by one from the take-in unit 110, conveys the first take-in conveyance path 142 and the introduction conveyance path 151, and passes the detection unit 160. The detection unit 160 detects the attribute of the paper sheet and outputs it to the control unit 13. Based on the left-right distinction detected by the detection unit 160, the control unit 13 passes one of the right-facing paper sheets and the left-facing paper sheets through the left-right reversing unit 170, and the second holding unit 210 of the stacker 200. Store in. The other paper sheet is stored in the second holding unit 210 of the stacker 200 without passing through the left-right reversing unit 170. When all the paper sheets are fed out from the take-in unit 110 and stored in the second holding unit 210, the control unit 13 waits for an approval operation. When an approval operation is performed by the operator, the control unit 13 discharges the sheets from the second holding unit 210 and stores them in the stacker 200. This completes the capture process. By this take-in process, the sheets fed into the sheet processing machine 1 are stored in the stacker 200 in a state where the left and right are aligned.

  When the operator performs an operation to discharge the paper sheet, the discharge process is started. The control unit 13 feeds paper sheets one by one from the stacker 200, transports the stacker transport path 146 and the main transport path 141, and introduces them into the front / back collecting unit 150. Paper sheets introduced into the introduction conveyance path 151 of the front / back arrangement unit 150 pass through the detection unit 160. The detection unit 160 detects the attribute of the paper sheet and outputs it to the control unit 13. Based on the front / back distinction detected by the detection unit 160, the control unit 13 introduces one of the front-facing paper sheet and the back-facing paper sheet into the reversing path 152, and the other paper sheet is It introduces into the non-inversion passage 154. The paper sheets introduced into the reversing path 152 are reversed by the paper sheet reversing mechanism 153, led out from the front / back arrangement unit 150 through the lead-out transport path 155, and passed through the main transport path 141 and the discharge transport path 143. It is sent out to the discharge part 120 through. The paper sheets introduced into the non-reversing path 154 are led out from the front / back collecting unit 150 through the lead-out transport path 155 in a state where the front and back are not reversed, and are discharged through the main transport path 141 and the discharge transport path 143. 120. When the number of sheets designated by the operator is sent to the discharge unit 120, the control unit 13 ends the discharge process. By this discharge processing, the paper sheets stored in the stacker 200 are sent out to the discharge unit 120 with the front and back sides aligned.

  Paper sheets in a state where the left and right sides and the front and back sides are aligned are discharged from the paper sheet processing machine 1 by the taking-in process using the left-right reversing unit 170 and the discharging process using the front / back collecting unit 150.

  With reference to FIG. 3, the structure of the front / back arrangement unit 150 and the conveyance / reversing of paper sheets will be described. As shown in FIG. 3, the introduction conveyance path 151, the reverse path 152, the non-reverse path 154, and the lead-out conveyance path 155 of the front / back arrangement unit 150 are configured by belts, rollers, or the like. Paper sheets are transported by being sandwiched between a plurality of belts in a posture in which the short side direction is parallel to the transport direction. In the drawing, although a plurality of members are depicted as being overlapped, in actuality, the plurality of members are appropriately spaced apart in the depth direction of the paper surface.

  The paper sheets conveyed through the introduction conveyance path 151 enter the reversing path 152 or the non-reversing path 154 at the branching section 156. In FIG. 3, the paper sheet A1 that has entered the reversing passage 152 is depicted. The paper sheet A1 is wound around a roller and advances, and the leading end F reaches the inlet of the paper sheet reversing mechanism 153, that is, the inlet 21a of the switchback part 21. Thereafter, the paper sheet A1 advances toward the stopper 22 and enters the switchback portion 21. Then, the paper sheet A1 is switched back at the switchback portion 21 and the traveling direction is reversed. Then, the paper sheet A <b> 1 exits the outlet 21 b of the switchback portion 21 from the rear end T, and is conveyed toward the joining portion 157. The paper sheet A2 shown in FIG. 3 is transported through the reverse passage 152 in a state where the rear end T is on the front side in the transport direction, and the rear end T reaches the junction 157.

  As described above, in the switchback portion 21, the traveling direction is reversed while the posture of the paper sheet is maintained. Thereby, the front and back of the paper sheet with respect to the transport direction are reversed. On the other hand, in the non-inversion path 154, since the path is formed in an S shape, the posture of the paper sheet with respect to the space changes, but the front and back of the paper sheet with respect to the transport direction are not reversed.

<Paper sheet reversal mechanism>
Next, the structure of the paper sheet reversing mechanism 153 will be described with reference to FIG. The paper sheet reversing mechanism 153 is a mechanism for reversing the front and back sides of the paper sheet by switchback conveyance, and is disposed in the front and back arranging unit 150. The paper sheet reversing mechanism 153 includes a switchback portion 21, a stopper 22, a moving mechanism 23, a first guide member 24, a second guide member 25, an impeller 26 (sending means), a guide member 27, and an adjusting mechanism 28 (see FIG. 3).

  The switchback portion 21 switches back the paper sheets introduced from the inlet 21a and discharges it from the outlet 21b. In the present embodiment, the switchback portion 21 is a portion surrounded by the upper belt 31, the middle belt 32, the lower belt 33, and the stopper 22.

  The inlet 21a will be described. Paper sheets conveyed through the reversing path 152 are conveyed while being sandwiched between the upper belt 31 and the middle belt 32. In the switchback portion 21, the upper belt 31 travels in the right direction in FIG. 3 (rearward direction of the paper sheet processor 1), and the middle belt 32 moves in the lower direction (paper sheet processor) along the roller 32a. 1). Then, the paper sheets are separated from the upper belt 31 and the middle belt 32 at a certain position. In the present embodiment, the position is the inlet 21 a of the switchback portion 21.

  The outlet 21b will be described. The paper sheets that exit the switchback portion 21 and are transported through the reverse passage 152 toward the junction 157 are transported while being sandwiched between the middle belt 32 and the lower belt 33 (paper sheets A2 in FIG. 3). reference). In the switchback portion 21, the middle belt 32 travels along the roller 32a in the downward direction of FIG. 3 (downward direction of the paper sheet processing machine 1), and the lower belt 33 moves in the left direction of FIG. Drive forward (1). Then, the paper sheet is sandwiched between the middle belt 32 and the lower belt 33 at a certain position. In the present embodiment, the position is the outlet 21b of the switchback portion 21.

  The stopper 22 is a member disposed in the switchback part 21. The stopper 22 contacts the leading edge F of the paper sheet when the paper sheet is switched back at the switchback portion 21. The stopper 22 has a contact surface 22a that contacts the tip F of the paper sheet. The contact surface 22a is inclined with respect to the moving direction G of the paper sheet. The angle formed between the moving direction G of the paper sheet and the contact surface 22a is preferably 85 ° or less, and more preferably 75 ° or more. The paper sheet moving direction G is a direction in which the paper sheet that has entered the switchback portion 21 from the inlet 21a moves.

  The moving mechanism 23 is a mechanism that moves the stopper 22. For example, the moving mechanism 23 includes a motor and a belt, and the operation is controlled by the control unit 13. The moving mechanism 23 moves the stopper 22 in the left-right direction in FIG. That is, the moving mechanism 23 moves the stopper 22 closer to and away from the inlet 21a, the middle belt 32, and the outlet 21b.

  The first guide member 24 is located at the position where the upper belt 31 does not exist in the width direction of the paper sheet processing machine 1 (the depth direction in FIG. 4), from the outer side to the inner side of the switchback portion 21. It is arranged to protrude beyond. The first guide member 24 suppresses the paper sheets introduced from the inlet 21 a to the switchback portion 21 from contacting the upper belt 31.

  The second guide member 25 is located at the position where the lower belt 33 does not exist in the width direction of the paper sheet processing machine 1 (the depth direction in FIG. 4). It is arranged to protrude beyond. The second guide member 25 prevents the paper sheets inside the switchback portion 21 from contacting the lower belt 33 before being pressed against the lower belt 33 by the impeller 26.

  The impeller 26 (delivery means) is a member that rotates around the central axis 26a, and has blades 26b that extend radially from the central axis 26a. The blade 26b is formed in a plate shape with a flexible material (for example, rubber) that can be deformed. The impeller 26 is disposed at the switchback portion 21 and sends the rear end T of the paper sheet contacting the stopper 22 toward the outlet 21b. Specifically, the blade 26b of the impeller 26 contacts the rear end T of the paper sheet, and sends the paper sheet toward the outlet 21b.

  The guide member 27 is disposed in the switchback portion 21 and guides the movement of the rear end T of the paper sheet. Specifically, the guide member 27 is a U-shaped member that can be elastically deformed, and is arranged in a state in which a vertex 27 a at the bottom of the U-shape protrudes from the switchback portion 21. One end of the guide member 27 is fixed, and the other end is supported by the adjustment mechanism 28.

  The adjusting mechanism 28 adjusts the amount of protrusion of the guide member 27 to the switchback portion 21, that is, the position of the apex 27a. For example, as shown in FIG. 3, the adjustment mechanism 28 includes a motor and a lever, and the operation is controlled by the control unit 13. The adjusting mechanism 28 moves the end of the guide member 27 in the left-right direction in FIG. That is, the adjusting mechanism 28 moves the guide member 27 (and its apex 27a) closer to and away from the stopper 22.

  FIG. 4 virtually shows a state in which paper sheets of different lengths are in contact with the stopper 22. The first paper sheet B1 has a length in the transport direction, that is, a length in the short direction is the first length L1. In the second paper sheet B2, the length in the transport direction, that is, the length in the short direction is the second length L2. The second length is assumed to be smaller than the first length.

  In FIG. 4, for convenience of drawing, the second paper sheet B2 is drawn below the first paper sheet B1. When the second paper sheet B2 enters the switchback portion 21, the second paper sheet B2 passes through the position overlapping the first paper sheet B1 of FIG.

  The moving mechanism 23 is controlled by the control unit 13 to move the stopper 22 closer to or away from the inlet 21 a based on the length of the paper sheet detected by the detection unit 160. Specifically, as shown in FIG. 4, when the first paper sheet B1 is switched back, the moving mechanism 23 moves the stopper 22 to the first position P1. When the second paper sheet B2 is switched back, the moving mechanism 23 moves the stopper 22 to the second position P2. In FIG. 4, the stopper 22 at the first position P1 is drawn by a solid line, and the stopper 22 at the second position P2 is drawn by a two-dot chain line. A distance between the stopper 22 located at the first position P1 and the inlet 21a is defined as a first distance D1. A distance between the stopper 22 located at the second position P2 and the inlet 21a is a second distance D2. The second distance D2 is smaller than the first distance D1. The difference between the first distance D1 and the second distance D2 is X12. X12 = D1-D2. The moving mechanism 23 is controlled by the control unit 13 to move the stopper 22 so that X12 becomes smaller than the difference (L1−L2) between the first length L1 and the second length L2.

  The size of X12 is smaller than the difference (L1-L2) between the first length L1 and the second length L2, and is 0 of the difference (L1-L2) between the first length L1 and the second length L2. It is preferably 4 times or more and 0.6 times or less, and more preferably half the difference (L1−L2) between the first length L1 and the second length L2.

In a state where the front end F of the first paper sheet B1 is in contact with the stopper 22, the distance between the stopper 22 and the rear end T at the first position P1 is the length of the first paper sheet B1 (first length). L1). In a state where the front end F of the second paper sheet B2 is in contact with the stopper 22, the distance between the stopper 22 and the rear end T at the second position P2 is the length (second length) of the second paper sheet B2. Equal to L2). In the state shown in FIG. 4, the distance Y12 between the rear end T of the first paper sheet B1 and the rear end T of the second paper sheet B2 is obtained by subtracting the second length L2 and X12 from the first length L1. Equal to the length. That is, the following relationship is established.
Y12 = L1-L2-X12

  The adjustment mechanism 28 is controlled by the control unit 13 to move the guide member 27 toward and away from the stopper 22 based on the length of the paper sheet detected by the detection unit 160. In FIG. 4, the position of the guide member 27 when the first paper sheet B1 is switched back is drawn by a solid line, and the position of the guide member 27 when the second paper sheet B2 is switched back is drawn by a two-dot chain line. It is. The adjusting mechanism 28 is controlled by the control unit 13 to adjust the guide member 27 so that the distance between the apex 27a of the guide member 27 and the stopper 22 is larger than the length of the paper sheet to be switched back. The distance between the apex 27a of the guide member 27 and the stopper 22 is preferably 1.01 times or more, more preferably 1.02 times or more, and preferably 1.05 times or less the length of the paper sheet to be switched back. 1.03 times or less is more preferable.

<Switchback transport of paper sheets>
With reference to FIGS. 5 to 8, the operation of the switchback portion 21 when the first paper sheet B1 is switched back will be described.

<FIG. 5: State ST01>
In the state shown in FIG. 5 (hereinafter referred to as “state ST01”), the leading edge F of the first paper sheet B1 is located at the inlet 21a. At this time, the stopper 22 is located at the first position P1. The distance between the stopper 22 and the inlet 21a is the first distance D1. That is, at this time, the leading edge F of the first paper sheet B1 reaches the inlet 21a of the switchback part 21, and the first paper sheet B1 starts to enter the switchback part 21.

<FIG. 6: State ST02>
Following the state ST01, the upper belt 31 and the middle belt 32 travel, and the first paper sheet B1 moves along the movement direction G. In the state shown in FIG. 6 (hereinafter referred to as “state ST02”), the leading edge F contacts the contact surface 22a of the stopper 22, and the first sheet B1 is stopped.

<FIG. 7: State ST03>
Following the state ST02, the impeller 26 rotates in the clockwise direction of FIG. 6, and the blade 26b comes into contact with the rear end T of the first paper sheet B1 to move the first paper sheet B1 downward. Let In the state shown in FIG. 7 (hereinafter referred to as “state ST03”), the first paper sheet B1 is in contact with the lower belt 33 by being pushed by the blade 26b.

<FIG. 8: State ST04>
Following the state ST03, the impeller 26 further rotates, and the lower belt 33 travels. The rear end T of the first paper sheet B1 is sandwiched between the impeller 26 and the lower belt 33 and moves toward the outlet 21b. That is, the blade 26b of the impeller 26 sends the rear end T of the first paper sheet B1 toward the outlet 21b. In the state shown in FIG. 8 (hereinafter referred to as “state ST04”), the rear end T of the first sheet B1 is positioned at the outlet 21b. That is, at this time, the rear end T of the first paper sheet B1 reaches the outlet 21b of the switchback portion 21, and the first paper sheet B1 begins to enter the lead-out conveyance path 155.

  Through the state ST01 to the state ST04 described above, the paper sheets in the switchback portion 21 are turned over.

  Next, switchback conveyance when the stopper 22 is disposed at an unfavorable position will be described in order to explain the effect of suppressing conveyance pitch change in the paper sheet reversing mechanism according to the present embodiment. The other conditions excluding the position of the stopper 22, for example, the traveling speed of the upper belt 31, the middle belt 32, and the lower belt 33, and the rotational speed of the impeller 26 are the same as the above-described conditions from ST01 to ST04. . In the following description, the time required for transition from a certain state to the next state will be considered. For example, the time required for transition from state ST06 to state ST07 is referred to as “time T0607”.

<FIG. 9: State ST05>
In the state shown in FIG. 9 (hereinafter referred to as “state ST05”), the leading edge F of the second paper sheet B2 is positioned at the inlet 21a. That is, the state ST05 is a state where the tip F of the second paper sheet B2 is at the same position as the state ST01.

  Here, the stopper 22 is positioned not at the second position P2 but at the third position P3. A distance between the stopper 22 at the third position P3 and the inlet 21a is a third distance D3. The third distance D3 is smaller than the first distance D1. The difference between the first distance D1 and the third distance D3 is X13. X13 = D1-D3. Here, it is assumed that X13 = L1-L2. That is, the third position P3 is a position where the stopper 22 is moved from the first position P1 by the same distance as the difference (L1−L2) between the first length L1 and the second length L2.

<FIG. 10: State ST06>
Following the state ST05, the upper belt 31 and the middle belt 32 travel, and the second paper sheet B2 moves along the movement direction G. In the state shown in FIG. 10 (hereinafter referred to as “state ST06”), the tip F contacts the contact surface 22a of the stopper 22, and the second paper sheet B2 is stopped.

  That is, the state ST06 is a state where the tip F of the second paper sheet B2 is in contact with the stopper 22 as in the state ST02. Here, the rear end T of the second paper sheet B2 is at the same position as the rear end T of the first paper sheet B1 in the state ST02. This is because the third position P3 of the stopper 22 is a position where the stopper 22 is moved from the first position P1 by the same distance as the difference (L1−L2) between the first length L1 and the second length L2. .

Consider time T0506. First, the time T0102 is calculated as D1 / V, where V is the moving speed of the paper sheet in the switchback portion 21. Here, the speed V is equal to the traveling speed of the upper belt 31 and the middle belt 32. T0506 is calculated as D3 / V. Since the third distance D3 is smaller than the first distance D1, T0506 is smaller than T0102. The difference between time T0506 and time T0102 is calculated as follows.
T0102-T0506 = (D1-D3) / V = X13 / V = (L1-L2) / V

<FIG. 11: State ST07>
Subsequent to the state ST06, the impeller 26 rotates in the clockwise direction, the blade 26b contacts the rear end T of the second paper sheet B2, and moves the second paper sheet B2 downward. In the state shown in FIG. 11 (hereinafter referred to as “state ST07”), the second paper sheet B2 is in contact with the lower belt 33 by being pushed by the blade 26b.

  That is, the state ST07 is a state in which the rear end T of the second paper sheet B2 is in contact with the lower belt 33 as in the state ST03. Here, the rear end T of the second paper sheet B2 is at the same position as the rear end T of the first paper sheet B1 in the state ST03. This is because the transition from the state ST06 to the state ST07 is performed by the rotation of the impeller 26 with the leading edge F of the paper sheet in contact with the stopper 22 as in the transition from the state ST02 to the state ST03.

  Now, consider the time T0607. As described above, the transition from the state ST06 to the state ST07 is performed by the rotation of the impeller 26 as in the transition from the state ST02 to the state ST03. Therefore, time T0607 is the same as time T0203.

<FIG. 12: State ST08>
Following the state ST07, the impeller 26 further rotates and the lower belt 33 travels. The rear end T of the second paper sheet B2 is sandwiched between the impeller 26 and the lower belt 33 and moves toward the outlet 21b. In the state shown in FIG. 12 (hereinafter referred to as “state ST08”), the rear end T of the second paper sheet B2 is positioned at the outlet 21b. That is, at this time, the rear end T of the second paper sheet B2 reaches the outlet 21b of the switchback portion 21, and the second paper sheet B2 starts to enter the lead-out conveyance path 155.

  That is, the state ST08 is a state in which the rear end T of the second paper sheet B2 is located at the outlet 21b, similarly to the state ST04.

  Now consider time T0708. As previously confirmed, the rear end T of the second paper sheet B2 in the state ST07 is at the same position as the rear end T of the first paper sheet B1 in the state ST03. Therefore, time T0708 is the same as time T0304.

Next, the time required for transition from state ST05 to state ST08 (time T0508) is compared with the time required for transition from state ST01 to state ST04 (time T0104). Time T0506 is shorter than time T0102 by X13 / V, that is, (L1-L2) / V. Time T0607 is the same as time T0203. Time T0708 is the same as time T0304. Therefore, time T0508 is shorter than time T0104, and the difference is X13 / V, that is, (L1−L2) / V. This relationship is expressed by the following formula.
T0508 = T0104-X13 / V = T0104- (L1-L2) / V

  The transition from the state ST01 to the state ST04 is a state where the stopper 22 is at the first position P1 and the leading edge F of the first paper sheet B1 is located at the entrance 21a, and the rear end T of the first paper sheet B1. Is the state transition to the exit 21b. The transition from the state ST05 to the state ST08 is a state where the stopper 22 is in the third position P3 and the state where the leading edge F of the second paper sheet B2 is located at the entrance 21a, and the rear end T of the second paper sheet B2. Is the state transition to the exit 21b. In other words, when a short paper sheet is switched back at the switchback part 21, if the stopper 22 is moved by the same amount as the amount of change in the length of the paper sheet, the time required to pass through the switchback part 21 is reached. X13 / V = (L1-L2) / V is shortened.

  Next, it will be shown that the change in the time required for the switchback due to the change in the length of the paper sheet can be made smaller by arranging the stopper 22 at an appropriate position.

<FIG. 13: State ST09>
In the state shown in FIG. 13 (hereinafter referred to as “state ST09”), the leading edge F of the second paper sheet B2 is located at the entrance 21a. That is, the state ST09 is a state where the leading edge F of the second paper sheet B2 is at the same position as the state ST01 and the state ST05.

  Here, the stopper 22 is positioned at the second position P2. As described above, the second distance D2 is smaller than the first distance D1. The difference between the first distance D1 and the second distance D2 is X12. X12 = D1-D2. X12 is smaller than the difference (L1-L2) between the first length L1 and the second length L2.

<FIG. 14: State ST10>
Following the state ST09, the upper belt 31 and the middle belt 32 run, and the second paper sheet B2 moves along the movement direction G. In the state shown in FIG. 14 (hereinafter referred to as “state ST10”), the leading edge F contacts the contact surface 22a of the stopper 22, and the second paper sheet B2 is stopped.

That is, the state ST10 is a state in which the tip F of the second paper sheet B2 is in contact with the stopper 22 as in the states ST02 and ST06. At this time, the distance between the rear end T of the second paper sheet B2 and the inlet 21a is larger by the distance Y12 than the distance between the rear end T of the first paper sheet B1 and the inlet 21a in the state ST04. The reason is as already described with reference to FIG. As described above, the distance Y12 is calculated as follows.
Y12 = L1-L2-X12

Consider time T0910. Time T0910 is calculated as D2 / V. Therefore, the difference between time T0910 and time T0102 is calculated as follows.
T0102-T0910 = (D1-D2) / V = X12 / V

  Since first distance D1> second distance D2> third distance D3, time T0102> time T0910> time T0506.

<FIG. 15: State ST11>
Subsequent to the state ST10, the impeller 26 rotates in the clockwise direction, the blade 26b comes into contact with the rear end T of the second paper sheet B2, and moves the second paper sheet B2 downward. In the state shown in FIG. 15 (hereinafter referred to as “state ST11”), the second paper sheet B2 is in contact with the lower belt 33 by being pushed by the blade 26b.

  That is, the state ST11 is a state in which the rear end T of the second paper sheet B2 is in contact with the lower belt 33, similarly to the state ST03. Here, the rear end T of the second paper sheet B2 is located farther from the outlet 21b by a distance Y12 than the rear end T of the first paper sheet B1 in the state ST03. This is because the transition from the state ST10 to the state ST11 is performed by the rotation of the impeller 26 with the leading edge F of the paper sheet in contact with the stopper 22 as in the transition from the state ST02 to the state ST03.

  Here, consider the time T1011. As described above, the transition from the state ST10 to the state ST11 is performed by the rotation of the impeller 26, similarly to the transition from the state ST02 to the state ST03. Therefore, time T1011 is the same as time T0203.

<FIG. 16: State ST12>
Following the state ST11, the impeller 26 further rotates and the lower belt 33 travels. The rear end T of the second paper sheet B2 is sandwiched between the impeller 26 and the lower belt 33 and moves toward the outlet 21b. In the state shown in FIG. 16 (hereinafter referred to as “state ST12”), the rear end T of the second paper sheet B2 is located at the outlet 21b. That is, at this time, the rear end T of the second paper sheet B2 reaches the outlet 21b of the switchback portion 21, and the second paper sheet B2 starts to enter the lead-out conveyance path 155.

  That is, the state ST12 is a state in which the rear end T of the second paper sheet B2 is located at the outlet 21b, similarly to the state ST04.

Consider the time T1112. As confirmed earlier, the rear end T of the second paper sheet B2 in the state ST11 is farther from the outlet 21b by a distance Y12 than the rear end T of the first paper sheet B1 in the state ST03. Therefore, time T1112 is longer by Y12 / V than time T0304. This relationship is expressed as follows:
T1112-T0304 = Y12 / V
Note that V is the moving speed of the paper sheets in the switchback portion 21 and the running speed of the lower belt 33 as described above.

右辺第２項（以下「Ｚ」と記す。）は、時間Ｔ０９１２と時間Ｔ０１０４との差異である。紙葉類の長さが変化した場合の、紙葉類がスイッチバック部位２１の入口２１ａから出口２１ｂまで移動する時間の変化は、小さい方が望ましい。したがって、Ｚの絶対値が小さい方が望ましい。 Next, the time required for transition from state ST09 to state ST12 (time T0912) is compared with the time required for transition from state ST01 to state ST04 (time T0104). Time T0910 is shorter than time T0102 by X12 / V. Time T1011 is the same as time T0203. Time T1112 is longer than time T0304 by Y12 / V. Therefore, the time T0912 is expressed by the following formula.
T0912 = T0104-X12 / V + Y12 / V

Here, there is the following relationship between X12 and Y12.
Y12 = L1-L2-X12

Substituting this relationship into the above equation yields the following relationship:

The second term on the right side (hereinafter referred to as “Z”) is the difference between time T0912 and time T0104. When the length of the paper sheet changes, it is desirable that the change in the time required for the paper sheet to move from the inlet 21a to the outlet 21b of the switchback portion 21 is smaller. Therefore, it is desirable that the absolute value of Z is small.

  In the case of X12 = (L1−L2) / 2, Z is zero, which is most preferable. X12 is the difference between the first distance D1 and the second distance D2. That is, it is most preferable that the difference between the first distance D1 and the second distance D2 is half of the difference between the first length L1 and the second length L2.

  The case of X12 = (L1-L2) corresponds to the case of the state ST05 to the state ST08 described above. That is, it corresponds to the case where the stopper 22 is moved according to the length of the paper sheet when the length of the paper sheet is changed as in the conventional apparatus. In this case, Z = − (L1−L2) / V.

  The case of X = 0 corresponds to the case where the stopper 22 is not moved when the length of the paper sheet changes. In this case, Z = (L1-L2) / V.

  In the case of 0 <X12 <(L1-L2), | Z | <(L1-L2) / V. That is, when the difference between the first distance D1 and the second distance D2 is larger than zero and smaller than the difference between the first length L1 and the second length L2, the value of Z is the case of the conventional apparatus | Z | = (L1−L2) / V becomes smaller.

  When X12 is a value close to (L1-L2) / 2, Z is close to zero, which is preferable. The difference between the first distance D1 and the second distance D2 is preferably about half of the difference between the first length L1 and the second length L2, particularly 0.4 times or more and 0.6 times or more.

  As a specific example, consider the case where the paper sheet is a euro banknote. There are six types of euro banknotes: 200 euro, 100 euro, 50 euro, 20 euro, 10 euro, and 5 euro. Tables 1 and 2 show the length in the short direction of each bill, the difference in length from the reference bill, and the control amount K of the position of the stopper 22. The control amount K is the amount of movement of the stopper 22 based on the position of the stopper 22 when reversing the reference bill. The amount of movement in the direction approaching the inlet 21a is a positive value, and the direction away from the inlet 21a. The amount of movement is expressed as a negative value. Table 1 is an example when a 200 euro banknote is used as a reference banknote, and Table 2 is an example when a 20 euro banknote is used as a reference banknote.

  In the above example, the reference banknote is the first paper sheet B1, the other banknote is the second paper sheet B2, and the half of the difference between the first length L1 and the second length L2 is the control amount K. When the stopper 22 is moved based on the control amount K, the difference in distance (X12) between the stopper 22 and the inlet 21a is half of the difference in length between the first length L1 and the second length L2. Become. Therefore, it is possible to suppress a change in the conveyance pitch when the bill type changes.

As described above, the paper sheet reversing mechanism 153 for reversing the front and back of the paper sheet is as follows.
A switchback portion 21 for switching back the paper sheets introduced from the inlet 21a and discharging the paper from the outlet 21b;
A stopper 22 disposed at the switchback portion 21 and in contact with the leading edge F of the paper sheet when the paper sheet is switched back;
A moving mechanism 23 for moving the stopper 22;
A paper sheet having a first length L1 along the conveyance direction when introduced into the switchback portion 21 is defined as a first paper sheet B1, and a length along the conveyance direction is a second length L2. As a second paper sheet B2, the second length L2 is smaller than the first length L1,
The moving mechanism 23 moves the stopper 22 to the first position P1 when switching back the first paper sheet B1.
When the second paper sheet B2 is switched back, the stopper 22 is moved to the second position P2,
A distance between the stopper 22 located at the first position P1 and the inlet 21a (first distance D1) and a distance between the stopper 22 located at the second position P2 and the inlet 21a (second distance D2). The difference (X12) is smaller than the difference between the first length L1 and the second length L2.

  A distance between the stopper 22 located at the first position P1 and the inlet 21a (first distance D1) and a distance between the stopper 22 located at the second position P2 and the inlet 21a (second distance D2). The difference (X12) is preferably 0.4 to 0.6 times the difference between the first length L1 and the second length L2.

  A distance between the stopper 22 located at the first position P1 and the inlet 21a (first distance D1) and a distance between the stopper 22 located at the second position P2 and the inlet 21a (second distance D2). More preferably, the difference (X12) is half of the difference between the first length L1 and the second length L2.

Then, the front / back arrangement unit 150 (an example of a paper sheet front / back arrangement device) that reverses the front and back sides of the paper sheets and arranges the front and back sides of the paper sheets,
An introduction conveyance path 151 for conveying paper sheets at a predetermined interval;
A detection unit 160 that is provided in the introduction conveyance path 151 and detects the front / back orientation of the paper sheet and the length of the paper sheet in the conveyance direction;
A reversing path 152 that conveys one of the front-facing paper sheet and the back-facing paper sheet, and reverses the front and back of the paper sheet;
A non-reversing passage 154 that conveys the other of the front-facing paper sheets and the back-facing paper sheets without reversing the front and back;
It has a lead-out conveyance path 155 for conveying the paper sheets from the reversing path 152 and the paper sheets from the non-reversing path 154 together.
The paper sheet reversing mechanism 153 described above is disposed in the reversing path 152.

<Other embodiments>
In the above-described embodiment, the switchback portion 21 of the paper sheet reversing mechanism 153 is configured to include the stopper 22. As a mechanism for switching back the paper sheets and inverting the front and back, a configuration without the stopper 22 is also possible. For example, the paper sheet is transported by being sandwiched between rollers or a belt at the switchback portion, the traveling direction of the roller or the belt is reversed, and the transport direction of the paper sheet is reversed and switched back. In the case of such a mechanism, it is configured as follows to suppress a change in the conveyance pitch when the length of the paper sheet is changed, similarly to the paper sheet reversing mechanism 153 according to the above-described embodiment. Can do.

A paper sheet reversing mechanism that reverses the front and back of a paper sheet,
It has a switchback part that switches back paper sheets introduced from the inlet and discharges it from the outlet,
A paper sheet having a first length along the transport direction when introduced into the switchback portion is a first paper sheet, and a length along the transport direction is a second length. As the second paper sheet, the second length is smaller than the first length,
The distance between the leading edge of the first paper sheet and the inlet when the first paper sheet switches back, and the leading edge of the second paper sheet when the second paper sheet switches back And the distance between the entrance and the entrance is smaller than the difference between the first length and the second length.

  Note that each configuration illustrated in the above-described embodiments is functionally schematic, and does not necessarily need to be physically configured as illustrated. That is, the form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in an arbitrary unit according to various loads or usage conditions. Can be configured.

  As described above, the paper sheet reversing mechanism according to the present invention can reduce the change in the conveyance pitch due to the change in the length of the paper sheet.

1: Paper sheet processing machine 10: Housing 13: Control unit 14: Storage unit 15: Operation display unit 21: Switchback part 21a: Inlet 21b: Outlet 22: Stopper 22a: Contact surface 23: Moving mechanism 24: First Guide member 25: Second guide member 26: Impeller 26a: Central shaft 26b: Blade 27: Guide member 27a: Apex 28: Adjusting mechanism 31: Upper belt 32: Middle belt 32a: Roller 33: Lower belt 110: Intake section 120: discharge unit 130: reject unit 140: transfer unit 141: main transfer path 142: first intake transfer path 143: discharge transfer path 144: reject transfer path 145: cassette transfer path 146: stacker transfer path 147: second take Conveyance path 150: Front / back collecting section 151: Introduction conveyance path 152: Inversion path 153: Paper sheet inversion mechanism 154: Non-inversion path 15 : Conveyance path 156: Branching section 157: Junction section 160: Detection section 170: Horizontal reversing section 171: Spiral transport path 180: Cassette 181: First cassette 182: Second cassette 190: First holding section 200: Stacker 210: 2nd reservation part A1: Paper sheet A2: Paper sheet B1: 1st paper sheet B2: 2nd paper sheet D1: 1st distance D2: 2nd distance D3: 3rd distance F: Tip G: Moving direction P1: First position P2: Second position P3: Third position T: Rear end

Claims (11)

A paper sheet reversing mechanism that reverses the front and back of a paper sheet,
A switchback part that switches back the paper sheets introduced from the inlet and discharges it from the outlet;
A stopper that is disposed at the switchback portion and contacts the leading edge of the paper sheet when the paper sheet switches back;
A moving mechanism for moving the stopper,
A paper sheet having a first length along the transport direction when introduced into the switchback portion is a first paper sheet, and a length along the transport direction is a second length. As the second paper sheet, the second length is smaller than the first length,
The moving mechanism moves the stopper to the first position when switching back the first paper sheet,
When switching back the second paper sheet, the stopper is moved to the second position,
The difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. Paper sheet reversal mechanism smaller than the difference in height. The difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. The paper sheet reversing mechanism according to claim 1, wherein the paper sheet reversing mechanism is 0.4 to 0.6 times the difference in thickness. The difference between the distance between the stopper located at the first position and the inlet and the distance between the stopper located at the second position and the inlet is the first length and the second length. The paper sheet reversing mechanism according to claim 1, wherein the paper sheet reversing mechanism is half the difference in thickness. The paper sheet reversing mechanism according to any one of claims 1 to 3, further comprising a sending unit that is disposed at the switchback portion and feeds a rear end of the paper sheet that contacts the stopper toward the outlet. The paper sheet reversing mechanism according to claim 4, wherein the delivery means is an impeller. The paper sheet reversing mechanism according to claim 5, wherein the impeller has a blade extending radially from a central axis, and the blade contacts a rear end of the paper sheet to feed the paper sheet. The paper sheet reversing mechanism according to any one of claims 1 to 6, further comprising a guide member that is disposed at the switchback portion and guides movement of a rear end of the paper sheet. The paper sheet according to any one of claims 1 to 7, wherein the stopper has a contact surface that contacts a leading end of the paper sheet, and the contact surface is inclined with respect to a moving direction of the paper sheet. Inversion mechanism. A paper sheet front / back arrangement device that reverses the front and back sides of the paper sheets and prepares the front and back sides of the paper sheets,
An introduction conveyance path for conveying paper sheets at a predetermined interval;
A detection unit that is provided in the introduction conveyance path and detects the front-side and reverse-side of the paper sheet and the length of the paper sheet in the conveyance direction;
A reversing passage that conveys one of the front-facing paper sheet and the back-facing paper sheet, and reverses the front and back of the paper sheet;
A non-reversing passage for conveying the other of the front-facing paper sheets and the back-facing paper sheets without reversing the front and back;
A lead-out conveyance path for conveying the paper sheets from the reversing path and the paper sheets from the non-reversing path,
A paper sheet front and back assembling apparatus in which the paper sheet reversing mechanism according to any one of claims 1 to 8 is disposed in the reversing path. A paper sheet processing machine having the paper sheet front / back arrangement apparatus according to claim 9. A paper sheet reversing mechanism that reverses the front and back of a paper sheet,
It has a switchback part that switches back paper sheets introduced from the inlet and discharges it from the outlet,
A paper sheet having a first length along the transport direction when introduced into the switchback portion is a first paper sheet, and a length along the transport direction is a second length. As the second paper sheet, the second length is smaller than the first length,
The distance between the leading edge of the first paper sheet and the inlet when the first paper sheet switches back, and the leading edge of the second paper sheet when the second paper sheet switches back And a paper sheet reversing mechanism in which a difference between the distance between the first length and the entrance is smaller than a difference between the first length and the second length.

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