JP2005082394A - Paper sheet reversal control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper sheet inversion control device that reduces the occurrence of jam by reducing the change in gap or pitch between paper sheets before and after the paper sheet reversing operation.
A reversing control device 19 for a paper sheet 12 includes a reversing unit 29 for conveying the paper sheet 12 conveyed from the first conveying means in a second direction different from the first direction, and a paper sheet. 12 is provided in the second conveying means, the sensor 53 for detecting the paper sheet, and the driving roller unit 49 based on the detection result of the sensor 53. , 51 and the control unit 2 for decelerating or accelerating the conveying speed of the paper sheet 12.
[Selection] Figure 6

Description

  The present invention relates to a paper sheet reversal control device for reversing the transport direction of a paper sheet such as a mail to be transported.

  As a paper sheet processing apparatus, for example, a mail processing apparatus that handles mail such as sealed letters and postcards, and a banknote processing apparatus that handles banknotes are known. For example, a postal processing apparatus has a take-out device that takes out paper sheets such as sealed letters and postcards set by an operator one by one, a transport unit that transports the taken-out paper sheets between the devices along a transport path, The image information is read from the front and back surfaces of the paper sheet, and the paper sheet is rotated 180 degrees around the conveyance direction by the discriminating device for discriminating the place where the stamp is pasted and the twist reversing belt. Twist reversing device for reversing the front and back of leaves, reversing control device for simultaneously reversing the front and back ends of the paper sheet in the transport direction and the front and back of the paper sheet, postmarks on stamps affixed to the paper A stamping device, a stacking device for stacking paper sheets in a stacking box, a sorting gate for selectively sorting paper sheets to each device, and the like.

  In the mail processing apparatus, a twist reversing device or a reversing control device is selectively used in order to make the position of a stamp affixed to a paper sheet a stampable position. The twist reversing device rotates the paper sheet 180 degrees around the same direction as the paper sheet conveying direction (twist reversal). The reversing control device simultaneously reverses the leading end and the trailing end of the paper sheet and the front and back of the paper sheet (switchback inversion).

  An example will be described in which when a paper sheet is conveyed in a standing position, a stamp is affixed on the downstream side in the conveyance direction and on the upper side on the right hand side toward the downstream side in the conveyance direction. When the paper sheet is twisted and reversed by the twist reversing device, the stamp is positioned on the left hand side toward the downstream side in the transport direction and on the downstream side and the lower side in the transport direction. Further, when the paper sheet is switched back by the reverse control device, the stamp is positioned on the right hand side toward the downstream side in the transport direction and on the upstream side and the lower side in the transport direction.

  As the paper sheet reversal control device, a forward / reverse roller, a tapping lever, etc. are provided in the device, and the conveyed paper sheet is conveyed in the straight direction as it is or reversely reversed and conveyed ( For example, see Patent Document 1).

In a paper sheet processing apparatus including a mail processing apparatus, a transport unit or the like is controlled so as to maintain a constant gap (gap) between transported paper sheets or a distance (pitch) between tips of paper sheets. The However, in the reversal control device, complicated control such as acceleration / deceleration of the conveyance speed of the paper sheet is performed when the paper sheet is reversed. For this reason, the gap or pitch between paper sheets is likely to change before and after the reversing operation. In particular, when the gap or pitch is shortened after the reversing operation, the paper sheets are too close to each other in the downstream conveyance section, and jamming is likely to occur.
JP-A-7-232847 (paragraphs [0025] and [0026], FIG. 1)

  An object of the present invention is to provide a paper sheet inversion control device that reduces the occurrence of jam by reducing the change in gap or pitch between paper sheets before and after the paper sheet reversal operation. .

  In order to achieve the above object, a paper sheet reversal control device according to the present invention comprises a first transport means for transporting a paper sheet in a first direction, a forward / reverse roller capable of forward / reverse rotation, and the forward / reverse rotation thereof. A pinch roller disposed opposite to the roller takes in the paper sheet conveyed from the first conveying means while rotating the forward / reverse rotation roller in the forward direction, and in the second direction different from the first direction. A reversing unit that conveys the reversing roller while rotating it in reverse, a second conveying unit that conveys the paper sheet conveyed from the reversing unit in the second direction, a driving roller, and the driving roller. A pinch roller sandwiches the paper sheet transported by the second transport unit, and is provided in the second transport unit and a driving roller unit that decelerates or accelerates the transport speed of the paper sheet. A sensor for detecting the paper sheet; Based on the detection result of the sensor, the calculation means for calculating the distance between the paper sheets, and based on the calculation result of the calculation means, when the distance between the paper sheets is shorter than a predetermined value, A control unit that decelerates the conveyance speed of the paper sheets by a driving roller unit, and accelerates the conveyance speed of the paper sheets by the driving roller unit when the distance between the paper sheets is longer than a predetermined value; An inversion control device for paper sheets, comprising:

  As described above, since the paper sheet reversal control device of the present invention has the above-described configuration and operation, the gap or pitch between the paper sheets before and after the paper sheet reversing operation is adjusted. By reducing the change, the occurrence of jam can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a control system of the paper sheet processing apparatus 1 of the present invention. The main control unit 2 is configured by a CPU that processes information transmitted from each unit of the paper sheet processing apparatus 1 and instructs each unit to perform an operation, a memory that stores an application program necessary for the operation of the CPU, and the like. Control overall operation. The main control unit 2 receives and processes information transmitted from the determination unit 15, the reject stacking unit 17, the stamping unit 20, the stacking unit 21, and the like, which will be described later, and operates each unit.

The take-out control unit 3 is connected to the main control unit 2 and is configured by a memory or the like that stores a driver that transmits and receives various types of information and operates a take-out unit 13 described later.

The conveyance control unit 4 is connected to the main control unit 2 to transmit / receive various information, and includes a twist reversing unit 18, a reversing control device 19, which will be described later, and a memory storing a driver for operating the conveyance unit 14.

The shift sensor control unit 5 is connected to the main control unit 2 to transmit and receive various information, and receives detection information of the paper sheet 12 from the reversing control device 19 and the shift sensors 35 and 53 installed in the transport unit 14 to be described later. To the main control unit 2.

The distribution gate control unit 6 is connected to the main control unit 2 to transmit and receive various types of information, and controls the operation of distribution gates 25a, 25b, and 25c described later.

FIG. 2 is a block diagram showing a configuration of the paper sheet processing apparatus 1 according to the embodiment of the present invention. The paper sheet processing apparatus 1 shown in FIG. 2 determines the position of a stamp affixed to a paper sheet 12 such as a sealed letter or a postcard, and stamps the postmark. Mails such as sealed letters and postcards are more difficult to handle because they have large variations in size and strength compared to securities such as banknotes and checks. In each of the following embodiments, a mail processing apparatus that handles mail is described. However, application to a securities processing apparatus that handles securities is also possible.

The paper sheet processing apparatus 1 shown in FIG. 2 collectively collects postal items such as sealed letters and postcards (hereinafter referred to as paper sheets 12), and picks them out one by one into the apparatus, and conveys them such as belts and rollers. A conveyance unit 14 that conveys the paper sheet 12 to each unit along the road, and a determination that reads the image information of the front and back surfaces of the conveyed paper sheet 12 and determines the position of the stamp affixed to the paper sheet 12 Based on the determination results of the unit 15 and the determination unit 15, the paper sheets 12 without stamps attached thereto, the reject stacking unit 17 for stacking the paper sheets 12 set in advance to be excluded, and the twist reversing belt Twist reversing section 18 for rotating paper sheets 180 degrees (twist reversal) around the same direction as the paper transport direction, the front end and the rear end in the transport direction of paper sheets 12, and the front and back of the paper sheets are simultaneously reversed. Inversion control device (switchback inversion) 19, a stamping unit 20 for stamping a stamp affixed to the paper sheet 12, a stacking unit 21 for sequentially stacking the paper sheet 12 after the stamping process into the stacking unit, and a conveyance path of the paper sheet 12, The distribution gate 25a that distributes to the normal conveyance path or the reject stacking unit 17 and the conveyance path of the paper sheet 12, the distribution gate 25b that distributes to the normal conveyance path or the twist reversing unit 18, and the conveyance path of the paper sheet 12 It is constituted by a distribution gate 25c that distributes to a normal transport path or the reversal control device 19.

In the take-out unit 13, a plurality of paper sheets 12 are stacked in a random direction by an operator's hand operating the paper sheet processing apparatus 1. The plurality of paper sheets 12 accumulated in the take-out unit 13 are taken out to the transport unit 14 while being separated one by one, and are transported to the determination unit 15. The determination unit 15 reads the image information on the front and back surfaces of the paper sheet 12, determines the position of the stamp affixed to the paper sheet 12, and transmits the determination result to the main control unit 2. Based on the determination result from the determination unit 15, the control unit 2 determines whether or not the paper sheet 12 is a rejection target. If the paper sheet 12 is to be rejected, the sorting gate 25a is operated and conveyed to the reject stacking unit 17. In addition, the control unit 2 determines the necessity of twist inversion or switchback inversion from the position of the stamp affixed to the paper 12 for the paper 12 determined to be other than the reject target, and the sorting gate 25b or The distribution gate 25c is selected and operated.

  Here, the position of the stamp attached to the paper sheet 12, and the movement of the stamp position in association with the twist reversal and switchback reversal to the paper sheet 12 will be described. An example will be described in which when a paper sheet 12 is conveyed in a standing position, a stamp is affixed to the downstream side in the conveyance direction on the right hand side toward the downstream side in the conveyance direction and on the upper side in the conveyance direction. When the paper sheet 12 is twisted and reversed by the twist reversing device 18, the stamp is positioned on the left-hand side toward the downstream side in the transport direction, and on the downstream side in the transport direction and on the lower side. Further, when the paper sheet 12 is switched back and reversed by the reversal control device 19, the stamp is positioned on the right hand side toward the downstream side in the transport direction and on the upstream side and the lower side in the transport direction.

By selectively performing twist inversion or switchback inversion, the stamp attached to the paper sheet 12 to be conveyed is a predetermined position, for example, the surface on the right hand side downstream in the conveyance direction, and the conveyance direction of this surface Downstream and upside. This predetermined position is a place where the stamp 20 can be stamped, and is a position where the stamp of the paper sheet 12 passes.

The paper sheets 12 subjected to the stamping process by the stamping unit 20 are conveyed to the stacking unit 21 and sequentially stacked in the stacking box.

FIG. 3 is a basic configuration diagram of the inversion control device 19 in each embodiment of the present invention. The basic configuration of the inversion control device 19 includes a main body transport unit 27 and an inversion unit 29.

Similar to the transport unit 14, the main body transport unit 27 includes a transport roller 31 and a transport belt 33, and performs belt nipping transport that transports the paper sheet 12 while being sandwiched between the transport belts 33. The main body transport unit 27 is provided with a shift sensor 35 that triggers a reversal operation of the reversing unit 29 by detecting the paper sheet 12. The shift sensor 35 detects the length of the paper sheet 12 by detecting the leading edge and the trailing edge of the paper sheet 12.

The reversing unit 29 includes a forward / reverse roller 37 having a drive source independent of the conveying roller 31 and the like, a pinch roller 39 that rotates following the forward / reverse roller 37, and guides 41 and 41 that guide the paper sheet 12. Is done. The pinch roller 39 is rotatably supported by the pinch roller rotation fulcrum 43 and is pressed against the forward / reverse rotation roller 37 by the restoring force of the spring 45.

At the transfer portion of the main body transport unit 27 and the reversing unit 29, a knock lever 47 that is driven and rotated by a solenoid is provided, and the leading end of the reversed paper sheet 12 is guided to the reversing control device 19 outlet side 19b by rotating. .

FIG. 4 is a graph showing control of the operation of the forward / reverse roller 37 in the basic configuration of the first to third embodiments of the present invention and the reverse control device 19 shown in FIG. The vertical axis of the graph shown in FIG. 4 indicates time T (s), and the vertical axis indicates the peripheral speed (conveying speed) V (m / s) of the forward / reverse roller 37. The peripheral speeds of the forward and reverse rollers 37 are V0 = 3 m / s and V1 = 5 m / s. Here, the circumferential speed V0 of the forward / reverse roller 37 is substantially the same speed as the transport speed of the transport section 14. However, the peripheral speeds V0 and V1 of the forward / reverse roller 37 are not particularly limited because they are appropriately changed according to various feature amounts such as the size, stiffness and weight of the paper sheet 12 being conveyed.

Next, the operation of the inversion control device 19 will be described with reference to FIGS. The paper sheet 12 is transported from the inlet side 19 a of the reversing control device 19, the leading end and the trailing end are detected by the shift sensor 35 of the main body transporting section 27, and triggers the reversing operation of the reversing section 29.

The paper sheet 12 is conveyed to the reversing unit 29 while being guided by the guides 41, 41, and is held between the forward / reverse roller 37 and the pinch roller 39 (T = t1). At this time, the pinch roller 39 rotates around the pinch roller rotation fulcrum 43 according to the thickness of the paper sheet 12 and escapes by the thickness of the paper sheet 12. Further, the forward / reverse roller 37 is rotating forward at a peripheral speed V = V0 clockwise in FIG.

The forward / reverse roller 37 starts acceleration from the moment when the paper sheet 12 is pinched based on detection of the leading edge of the paper sheet 12 by the shift sensor 35 (T = t1), and accelerates to a peripheral speed V = V1. When T = t2, the forward / reverse roller 37 starts decelerating operation from the peripheral speed V1, and stops the rear end of the sheet 12 at the reference position (T = t3).

While the paper sheet 12 is stopped, the tapping lever 47 operates, and the rear end of the paper sheet 12 (the front end in the transport direction of the paper sheet 12 after being reversed) is directed to the outlet side 19b.

When T = t4, the forward / reverse roller 37 starts reverse rotation (counterclockwise direction in FIG. 3), and the peripheral speed reaches V = −V0. When the rear end of the paper sheet 12 is released from the clamping of the forward / reverse rotation roller 37 and the pinch roller 39, the forward / reverse rotation roller 37 starts to decelerate and stops (T = t5).

When T = t6, the forward / reverse roller 37 starts to rotate forward again and reaches the peripheral speed V = V0 at T = t7.

In the reversal control device 19, the forward / reverse roller 37 is a series of constant speed forward rotation, acceleration, constant speed forward rotation, deceleration, stop, reverse rotation acceleration, and constant speed reverse rotation when the paper sheet 12 is reversed. Is doing the operation. Thereby, since the space | interval between paper sheets 12, ie, a gap (or pitch), is maintained, the gap (or pitch) can be shortened more and the processing capability of the paper sheet processing apparatus 1 can be improved. Here, the gap is a distance from the rear end of the transported paper sheet 12 to the front end of another paper sheet 12 transported upstream of the paper sheet 12 in the transport direction. The pitch is a distance from the leading end of the transported paper sheet 12 to the leading end of another paper sheet 12 transported upstream of the paper sheet 12 in the transport direction.

Further, the acceleration operation of the forward / reverse roller 37 is performed with different acceleration curves (acceleration gradients) based on the detection result of the length detection of each paper sheet 12 by the shift sensor 35. The longer the length of the paper sheet 12 in the transport direction, the larger the acceleration curve (acceleration slope) is required. When the transported paper sheets 12 have the same size such as a ticket or a check, or when the variation in length is small like a bill, there is no need to change the acceleration curve.

Next, the reason why the gap (or pitch) of the paper sheet 12 changes before and after the reversal in the reversal operation in the reversal control device 19 will be described.

FIG. 5 is a diagram showing a configuration of the inversion control device 19 in the inversion operation. Each part of the inversion control device 19 shown in FIG. 5 is the same as the device shown in FIG. 3, and the description of the common configuration is omitted.

FIG. 5 shows a state in which the leading end 12a of the paper sheet 12 is sandwiched between the forward / reverse rotation roller 37 and the pinch roller 39, and the forward / reverse rotation roller 37 starts an acceleration operation. At this time, a portion from the rear end 12 b of the paper sheet 12 to 12 c near the exit of the main body transport unit 27 is sandwiched by the transport belt 33. For this reason, even if the forward / reverse rotation roller 37 holding the paper sheet leading edge 12a starts the acceleration operation, the part from the paper sheet trailing edge 12b to the vicinity of the exit 12c of the main body conveying unit 27 is sandwiched by the conveying belt 33. Therefore, it becomes a resistance, and the stop position of the paper sheet 12 is shifted to the upstream side in the conveyance direction (left side in FIG. 5).

When the stop position of the paper sheet 12 is shifted to the upstream side in the transport direction and stops, the gap (or pitch) with the paper sheet 12 transported downstream of the paper sheet 12 in the transport direction is reversed. Shorter than before. When the gap (or pitch) between the paper sheets 12 is shortened, jamming is likely to occur. In order to reverse the paper sheet 12 in consideration of the change in the gap (or pitch), it is necessary to set the gap (or pitch) longer. If the gap (or pitch) between the sheets is long, the conveyance density is lowered, and the processing amount of the sheet processing apparatus 1 is reduced.

FIG. 6 is a diagram showing an overall configuration of the inversion control device 19 according to the first embodiment of the present invention. In the first embodiment, in contrast to the basic configuration shown in FIG. 3, a drive roller 49 having a drive source independent of the transport unit 14 in the transport path after the paper sheet 12 is reversed, and this drive A pinch roller 51 is provided at a position facing the roller 49. Further, a shift sensor 53 serving as a trigger for operating the driving roller 49 is provided upstream of the driving roller 49 in the transport direction. The shift sensor 53 detects the leading edge and the trailing edge of the paper sheet 12 and monitors the gap between the paper sheets 12. The shift sensor 53 detects the leading edge of the paper sheet 12 and monitors the pitch between the paper sheets 12.

FIG. 7 is a cross-sectional view of the driving roller 49, the pinch roller 51, and the transport belt 33 shown in FIG. 6 as viewed from the transport direction. As shown in FIG. 7, a pair of drive roller 49 and pinch roller 51 is provided on both sides of the conveyor belt 33. The driving roller 49 normally rotates at the same peripheral speed as the conveying speed of the conveying belt 33 and does not change the conveying speed of the conveyed paper sheet 12.

The shift sensor 53 detects a gap (or pitch) between the paper sheet 12 reversed by the reversal control device 19 and another paper sheet 12 transported downstream in the transport direction of the paper sheet 12. . When the gap (or pitch) is shortened based on the detection result, the driving roller 49 and the pinch roller 51 decelerate at the moment when the paper sheet 12 is sandwiched to decelerate the paper sheet 12, and the paper sheet 12 A gap (or pitch) with another sheet 12 conveyed downstream in the conveying direction is corrected to an appropriate length.

On the contrary, when the transport position of the paper sheet 12 is shifted and the gap (or pitch) between the paper sheets 12 becomes longer on the upstream side of the reversing control device 19, the change in the gap (or pitch) is shifted. The sensor 53 detects it. Based on the detection result, the driving roller 49 and the pinch roller 51 are accelerated at the moment when the paper sheet 12 is sandwiched, so that the paper sheet 12 is shifted to the downstream side in the transport direction so that it should be transported. Perform gap (or pitch) correction.

In FIG. 6, the reversed paper sheet 12 is nipped by the conveying belt 33, but the nipping force is small because the conveying path is linear, and the pinch pressure of the pinch roller 51 is held between the conveying belt 33. The gap correction can be appropriately performed by setting it appropriately larger than the force.

According to the first embodiment, not only the gap (or pitch) is shortened but also the gap (or pitch) is increased with respect to the change of the gap (or pitch) after the inversion of the inversion control device 19. Even in this case, the gap (or pitch) can be corrected and the change in the gap (or pitch) can be eliminated.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a diagram illustrating a configuration of the inversion control device 19 according to the second embodiment, and a description of portions common to the inversion control device 19 illustrated in FIG. 3 is omitted. In the reversal control device 19 shown in FIG. 8, the main body transport unit outlet 55 immediately before the reversing unit 29 is disposed at a position facing the drive roller 57 for transporting the paper sheet 12 and the drive roller 57. A pinch roller 59 for applying a pinch pressure to 12 and guides 41, 41, 41, 41 for guiding the paper sheet 12 to the reversing unit 29 are provided.

The drive roller 57 receives a driving force from the transport unit 14 of the paper sheet processing apparatus 1 and rotates at the same peripheral speed as the transport speed of the transport unit 14. Further, the driving roller 57 includes a one-way clutch, and the rotation is free only in the direction in which the paper sheet 12 is accelerated and pulled out. For this reason, when the forward / reverse rotation roller 37 and the pinch roller 39 accelerate and pull out at the moment when the paper sheet 12 is sandwiched, even if the rear end of the paper sheet 12 remains in the vicinity of the main body conveyance unit outlet 55, resistance is increased. Don't be.

A series of operations according to the second embodiment will be described. First, the paper sheet 12 conveyed from the inlet side 19a is pulled out to the reversing part 29 side by being held between the forward and reverse rotation rollers 37 and the pinch roller 39 and being accelerated. At this time, the rear end of the paper sheet 12 is sandwiched between the drive roller 57 and the pinch roller 59, but the drive roller 57 and the pinch roller 59 No resistance from pinching.

For this reason, by preventing the stop position of the paper sheet 12 from changing, it is possible to reduce the change in the gap (or pitch) after inversion and reduce the occurrence of jam. The drive roller 57 and the pinch roller 59 are one set, but there is no particular limitation, and a plurality of sets may be installed according to the shape of the transport unit 14 and the like.

9 and 10 are diagrams showing the configuration of the inversion control device 19 according to the third embodiment of the present invention. A description of portions common to the inversion control device 19 shown in FIG. 3 is omitted. As shown in FIGS. 9 and 10, a rotation tension roller 61 having an independent motor drive source is provided in the transport unit 14 upstream of the reversing unit 29 of the reversing control device 19. Normally, as shown in FIG. 9, the rotary tension roller 61 is pressed against the conveyance belt 33 on the upstream side in the conveyance direction of the main body conveyance section outlet 55, so that the conveyance belt 33 is held between the paper sheets 12. Power is generated. As shown in FIG. 10, when the paper sheet 12 is reversed, the rotation tension roller 61 is separated from the transport belt 33. For this reason, since the main body transport unit outlet 55 is released from the pressing of the rotary tension roller 61, the clamping force of the belt 33 is reduced.

  A series of reversing operations of the reversing control device 19 including the rotating tension roller 61 will be described. The leading edge and the trailing edge of the paper sheet 12 conveyed from the inlet side 19 a are detected by the leading edge of the paper sheet 12 passing through the shift sensor 35. With this detection as a trigger, the moment when the paper sheet 12 is sandwiched between the forward / reverse rotation roller 37 and the pinch roller 39, the rotation tension roller 61 is separated from the conveyance belt 33, and the conveyance belt 33 at the main body conveyance unit outlet 55 is opened. At this time, the rear end of the paper sheet 12 does not give resistance to the acceleration operation of the forward / reverse rotation roller 37 and the pinch roller 39 because the conveyance belt 33 is opened. By preventing the stop position of the paper sheet 12 from changing, the change in the gap (or pitch) of the paper sheet 12 before and after the reversing operation of the reversing control device 19 can be reduced.

  FIG. 11 is a diagram showing the configuration of the paper sheet reversal control device 11 according to the fourth embodiment of the present invention. A description of portions common to the inversion control device 19 shown in FIG. 3 is omitted. The conveyance unit 14 around the main body conveyance unit outlet 55 from the vicinity of the inlet side 19a of the reverse control device 19 includes a shift sensor 35, a plurality of rollers to be described later, and the like.

  The plurality of rollers include a driving roller 63 and 63 that rotate at the same conveying speed as the conveying unit 14 of the paper sheet processing apparatus 1, an acceleration driving roller 65 that rotates at a higher conveying speed than the driving roller 63, a driving roller 63, 63 and the acceleration drive roller 65 are arranged opposite to each other and are constituted by pinch rollers 67, 67, 67 for applying a pinch pressure. Furthermore, guides 41, 41, 41, 41 for guiding the paper sheet 12 to the reversing unit 29 are provided.

  The paper sheet 12 is accelerated as it passes through the drive rollers 63 and 63 and the acceleration drive roller 65. The drive rollers 63 and 63 are each provided with a one-way clutch, and the acceleration drive roller 65 accelerates the conveyance speed of the paper sheet 12 without receiving resistance.

  FIG. 12 is a graph showing the control of the peripheral speed V (conveyance speed) of the forward / reverse roller 37 of the reverse controller 19 according to the fourth embodiment of the present invention.

  The horizontal axis of the graph represents time T (s), and the vertical axis represents the peripheral speed (conveying speed) V (m / s) of the forward / reverse roller 37. The peripheral speeds of the forward and reverse rollers 37 are V0 = 3 m / s and V1 = 5 m / s. Here, the circumferential speed V0 of the forward / reverse roller 37 is substantially the same speed as the transport speed of the transport section 14. However, the circumferential speed V is not particularly limited because V is appropriately changed according to various feature amounts such as the size, strength, weight, and the like of the paper sheet 12 being conveyed.

  The transport speed of the drive rollers 63 and 63 shown in FIG. 11 is V = V0, and the transport speed of the acceleration drive roller 65 is V = V1. For this reason, the paper sheet 12 has already reached the conveyance speed of the forward / reverse rotation roller 37 before being conveyed to the reversing unit 29. Further, as shown in FIG. 12, the transport speed of the forward / reverse roller 37 performs a series of operations such as a forward rotation constant speed (V1), deceleration, stop, reverse rotation acceleration, and reverse rotation constant speed (-V0). Therefore, the forward / reverse roller 37 and the pinch roller 39 do not need to perform an acceleration operation at the moment when the paper sheet 12 is sandwiched, and the control of the forward / reverse roller 37 is simplified and stabilized.

  Further, based on the fact that the shift sensor 35 detects the rear end of the paper sheet 12, the forward / reverse rotation roller 37 starts to decelerate after a predetermined time from the detected time (t11) and stops (t12). At this time, it is possible to arrange the position of the rear end (or the front end after reversal) of the paper sheet 12 with the same deceleration curve regardless of the length of the paper sheet 12 in the transport direction.

  Furthermore, before and after the reversing operation of the reversing control device 19, it is possible to reduce the change in pitch (or gap) between the paper sheets 12 and to reduce the occurrence of jam. Here, the acceleration drive roller 65 and the pinch roller 67 are not limited to one set, and a plurality of acceleration drive rollers 65 including a one-way clutch may be provided to accelerate in stages.

  Further, as a modification of the fourth embodiment, the acceleration drive roller 65 is configured by a drive roller with a one-way clutch, and is configured to accelerate at the moment when the forward / reverse rotation roller 37 sandwiches the paper sheet 12. Also good. At this time, the conveyance speed of the forward / reverse roller 37 is controlled as shown in FIG. According to the modification of the fourth embodiment, when the forward / reverse rotation roller 37 pulls out the paper sheet 12, the acceleration drive roller 65 and the pinch roller 67 do not become resistance, so the paper sheet before and after the reversing operation. It is possible to reduce the change of 12 gaps or pitches, and to reduce the occurrence of jam.

  From the above description of the first to fourth embodiments, a paper sheet that reduces the occurrence of jam by reducing the change in the gap or pitch between the paper sheets 12 before and after the reversing operation of the paper sheet 12. The reversal control device 1 of the class 12 can be provided.

The block diagram which shows the control system of the inversion control apparatus of the paper sheets concerning embodiment of this invention. The block diagram which shows the structure of the inversion control apparatus of the paper sheets concerning embodiment of this invention. The basic block diagram of the inversion control apparatus concerning each embodiment of this invention. The graph which shows operation | movement of the forward / reverse rotation roller concerning the 1st thru | or 3rd embodiment of this invention and the basic composition of the inversion control apparatus shown by FIG. The figure which shows operation | movement of the inversion control apparatus in inversion operation | movement. The figure which shows the structure of the inversion control apparatus concerning the 1st Embodiment of this invention. Sectional drawing of the drive roller, pinch roller, and conveyance belt concerning the 1st Embodiment of this invention. The figure which shows the structure of the inversion control apparatus concerning the 2nd Embodiment of this invention. The figure which shows the structure of the inversion control apparatus concerning the 3rd Embodiment of this invention. The figure which shows the structure of the inversion control apparatus concerning the 3rd Embodiment of this invention. The figure which shows the structure of the inversion control apparatus concerning the 4th Embodiment of this invention. The graph which shows operation | movement of the forward / reverse rotation roller concerning the 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper sheet processing apparatus, 2 Main control part, 3 Take-out control part, 4 Transport control part, 5 Shift sensor control part, 6 Sorting gate control part, 12 Paper sheets, 13 Take-out part, 14 Transport part, 15 Discrimination part , 17 reject stacking unit, 18 twist reversing unit, 19 reversing control device, 19a inlet side, 19b outlet side, 20 stamping unit, 21 stacking unit, 25a, 25b, 25c sorting gate, 27 main body transporting unit, 29 reversing unit, 31 Conveyance roller, 33 Conveyor belt, 35, 53 Shift sensor, 37 Forward / reverse roller, 39, 51, 59, 67 Pinch roller, 41 Guide,
43 Pinch roller rotation fulcrum, 45 Spring, 47 Stroke lever, 49, 57, 63 Driving roller, 55 Main body exit, 61 Rotation tension roller, 65 Acceleration driving roller

Claims (9)

First conveying means for conveying paper sheets in a first direction;
The paper sheet conveyed from the first conveying means is taken in while rotating the normal / reverse rotation roller by a normal / reverse rotation roller capable of normal / reverse rotation and a pinch roller disposed opposite to the normal / reverse rotation roller. A reversing unit that conveys the forward and reverse rollers while rotating in the reverse direction in a second direction different from the direction of 1;
A second conveying means for conveying the paper sheets conveyed from the reversing unit in the second direction;
A driving roller unit that sandwiches the paper sheet conveyed by the second conveying unit by a driving roller and a pinch roller disposed opposite to the driving roller, and decelerates or accelerates the conveying speed of the paper sheet; ,
A sensor provided in the second transport means for detecting the paper sheet;
Based on the detection result of this sensor, a calculation means for calculating the distance between the paper sheets,
Based on the calculation result of the calculating means, when the distance between the paper sheets is shorter than a predetermined value, the driving roller unit reduces the transport speed of the paper sheets, and the distance between the paper sheets is And a control unit for accelerating the conveyance speed of the paper sheet by the drive roller unit when longer than a predetermined value. The sensor detects the trailing edge of the paper sheet and the leading edge of the paper sheet conveyed next to the paper sheet,
2. The paper sheet reversing control apparatus according to claim 1, wherein the calculating unit calculates a gap between the paper sheets based on a detection result of the sensor. The sensor detects the leading edge of the paper sheet and the leading edge of the paper sheet conveyed next to the paper sheet,
2. The paper sheet reversing control device according to claim 1, wherein the calculating unit calculates a pitch between the paper sheets based on a detection result of the sensor. First conveying means for nipping and conveying the paper sheets in a first direction;
The first direction is picked up while accelerating the transport speed of the paper sheet transported from the first transport means by a forward / reverse roller capable of forward / reverse rotation and a pinch roller disposed opposite to the forward / reverse roller. A reversing unit for conveying in a second direction different from
A second conveying means for conveying the paper sheets conveyed from the reversing unit in the second direction;
A paper sheet reversal control comprising: means for reducing the transport resistance applied to the paper sheet by the first transport means when the reversing unit takes in the paper sheet while accelerating the paper sheet. apparatus. A transport roller that includes a one-way clutch that is rotationally driven only in the first direction, and that transports paper sheets in the first transport direction;
A forward / reverse rotation roller capable of forward / reverse rotation and a pinch roller disposed opposite to the forward / reverse rotation roller take in the paper sheet conveyed from the conveyance roller while accelerating the conveyance speed, and differ from the first direction. A reversing unit for conveying in the direction of 2;
A second conveying means for conveying the paper sheets conveyed from the reversing unit in the second direction;
An inversion control device for paper sheets, comprising: A transport belt for sandwiching paper sheets with a belt and transporting the paper in the first direction;
The belt is provided so as to be freely contacted and separated from the belt, and when the belt is brought into pressure contact with the belt, the clamping force for clamping the paper sheet is increased, and when the belt is separated from the belt, the belt clamps the paper sheet. Clamping force adjusting means for reducing the clamping force;
A forward / reverse rotation roller capable of forward / reverse rotation and a pinch roller disposed opposite to the forward / reverse rotation roller take in the paper sheet conveyed from the conveyance belt while accelerating the conveyance speed, and differ from the first direction. A reversing unit for conveying in the direction of 2;
A second conveying means for conveying the paper sheets conveyed from the reversing unit in the second direction;
A control unit that operates the clamping force adjusting means to reduce the clamping force of the belt when the reversing unit takes in the sheet while accelerating the conveyance speed of the sheet. Inversion control device. A transport roller that includes a one-way clutch that is rotationally driven only in the first direction, and that transports paper sheets in the first direction at a first transport speed;
An accelerating transport roller for transporting the paper sheet transported from the transport roller in the first direction at a second transport speed higher than the first transport speed;
The sheet transported from the acceleration transport roller is taken in at the second transport speed by a forward / reverse roller capable of forward / reverse rotation and a pinch roller disposed opposite to the forward / reverse roller, and the first transport A reversing unit for conveying in a second direction different from the direction;
A paper sheet reversal control device comprising: a first transport unit configured to transport the paper sheet transported from the reversing unit in the second direction. A sensor that is provided upstream of the reversing unit in the transport direction, and that detects a rear end of the paper sheet;
8. The paper sheet reversing control device according to claim 7, wherein the reversing unit decelerates and stops the transport speed of the paper based on a detection result of the sensor. A transport roller that includes a one-way clutch that is rotationally driven only in the first direction, and that transports paper sheets in the first direction at a first transport speed;
A one-way clutch that is rotationally driven only in the first direction, and the sheets conveyed from the conveying roller are moved in the first direction at a second conveying speed that is faster than the first conveying speed. An accelerating conveying roller for conveying,
The sheet is conveyed while accelerating the conveying speed of the paper sheet conveyed from the accelerating conveying roller by a forward / reverse rotating roller and a pinch roller disposed opposite to the normal / reverse rotating roller, and the first direction and A reversing unit for conveying in a different second direction;
A paper sheet reversal control device comprising: a first transport unit configured to transport the paper sheet transported from the reversing unit in the second direction.

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