Sheet processing apparatus

Abstract

To easily adjust positions of a light emitting part and a light receiving part of a sensor unit for detecting whether or not paper sheets are conveyed on a conveying passage in an overlapped state.SOLUTION: The first light emission portion 50 is provided with a rectangular light exit frame 75 that limits an irradiation region of light to be emitted, and the first detection portion 51 is provided with a rectangular light entrance frame 76 that limits a light reception region of light to be received. A region where the light exit frame 75 and the light entrance frame 76 face each other is a detection region of the first detection unit 51, a signal corresponding to the amount of received light is output, and in a range where the areas of the detection regions are the same, the detection level of the first detection unit 51 is constant, and it is possible to reduce or prevent a variation due to a relative positional deviation. By attaching the components forming the transport path for transporting the paper sheet including the first light emission unit 50 and the first detection unit 51 to desired positions, it is possible to eliminate the need for adjusting the relative positions of the first light emission unit 50 and the first detection unit 51.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a paper sheet processing apparatus that inputs and outputs paper sheets, and more particularly to a banknote processing apparatus that inputs and outputs banknotes as paper sheets. [Background technology]

[0002] For example, a banknote processing device that processes paper sheets such as banknotes accepts banknotes, identifies their denominations, stores them, and discharges them. The banknote processing device includes a deposit port that accepts banknotes, a dispensing port that discharges banknotes, a transport path that transports the banknotes, an identification unit that identifies the denominations of the banknotes, a sorting unit that sorts the banknotes by denomination, and a storage vault that stores or dispenses stored banknotes by denomination. Such a banknote processing device accepts banknotes through the deposit port and identifies the denominations of the banknotes using the identification unit located along the transport path. The banknotes whose denominations have been identified are sorted by the sorting unit located along the transport path and stored in banknote storage vaults by denomination. When dispensing banknotes, the banknote processing device feeds banknotes of a specified denomination and number from the storage vault, transports them to the dispensing port, and dispenses them. Banknote processing devices are used in currency exchange machines and change dispensers.

[0003] For example, Japanese Patent Application Laid-Open Publication No. 2018-36874 describes a paper sheet detection device that has an ultraviolet light emitter and a light receiver arranged on a conveyance path and detects paper sheets such as banknotes passing between them. This paper sheet detection device is incorporated into a device such as a paper sheet processing device and detects paper sheets being conveyed. The ultraviolet light emitted from the light emitter is blocked by transparent or opaque portions of the paper sheets. The detector detects the paper sheets based on the amount of light received by the light receiver, i.e., the output signal from the light receiver. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-36874 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional paper processing devices require the ultraviolet light emitter and receiver to be positioned opposite each other, and if the light is misaligned, the detection level of the receiver drops, so precise position adjustment is required to position the light emitter and receiver opposite each other.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a paper sheet processing apparatus that allows easy positional adjustment of a light emitting unit and a light receiving unit. [Means for solving the problem]

[0007] The paper sheet processing device of the present invention is a paper sheet processing device having a transport path for transporting paper sheets, a storage cabinet connected to the transport path for storing or feeding out the paper sheets, a light-emitting unit arranged on one side of the transport path that sandwiches the paper sheets transported therethrough and irradiates light, and a detection unit arranged on the other side of the transport path that sandwiches the paper sheets transported therethrough and opposite the light-emitting unit, that receives the light irradiated from the light-emitting unit and outputs a signal according to the amount of light received, wherein the light-emitting unit has a light-exiting frame that is opened to a first predetermined width in the short side direction and controls the irradiation area by the light-exiting frame, the detection unit has a light-entering frame that is opened to a second predetermined width in the short side direction and controls the light-receiving area by the light-entering frame, the light-exiting frame and the light-entering frame are opposed to each other with their longitudinal directions intersecting, and the light irradiated from the light-emitting unit and that passes through the light-exiting frame and the light-entering frame is received by the detection unit. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a paper sheet processing apparatus that allows easy positional adjustment of the light emitting unit and the light receiving unit. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating the internal configuration of a banknote handling apparatus. [Figure 2] FIG. 2 is a perspective view of the appearance of the banknote handling machine. [Figure 3]FIG. 3 is a first diagram illustrating the configuration of the banknote handling machine. [Figure 4] FIG. 4 is a second diagram illustrating the configuration of the banknote handling machine. [Figure 5] FIG. 5 is a first diagram illustrating the arrangement of the sensor units of the banknote processing device. [Figure 6] FIG. 6 is a second diagram illustrating the arrangement of the sensor units of the banknote processing device. [Figure 7] FIG. 7 is a third diagram illustrating the arrangement of the sensor units of the banknote processing device. [Figure 8] FIG. 8 is a first diagram illustrating an overview of the sensor unit of the banknote processing device. [Figure 9] FIG. 9 is a second diagram illustrating an outline of the sensor unit of the banknote processing device. [Figure 10] FIG. 10 is a first diagram illustrating an attachment portion of the sensor unit of the banknote processing device. [Figure 11] FIG. 11 is a second diagram illustrating the attachment portion of the sensor unit of the banknote processing device. [Figure 12] FIG. 12 is a diagram illustrating an outline of a light emitting section of a sensor unit of a banknote processing device. [Figure 13] FIG. 13 is a diagram illustrating an outline of a detection section of a sensor unit of a banknote processing device. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to Figures 1 to 13. Each figure is merely a schematic illustration to allow a sufficient understanding of the present invention. Therefore, the present invention is not limited to the illustrated examples. In addition, in each figure, common or similar components are assigned the same reference numerals, and redundant explanations thereof will be omitted.

[0011] In the following explanation, the paper sheet processing device will be described using a banknote processing device that processes banknotes, a type of paper sheet, as an example. In place of the banknotes used in the paper sheet processing device, it is also possible to process paper sheets similar to banknotes, such as securities, checks, and sheets of paper or resin of a predetermined size.

[0012] First, the appearance of the banknote processing device 1 will be described with reference to FIG. 2. FIG. 2 is a perspective view of the banknote processing device. The banknote processing device 1 can receive banknotes 8, indicated by dashed lines, through the deposit slot 2 and discharge them through the withdrawal slot 3. The banknote processing device 1 can insert multiple stacked banknotes 8 into the deposit slot 2. The stacked banknotes 8 inserted into the deposit slot 2 are separated into individual banknotes by a separator built into the banknote processing device 1 and then transported inside. The banknote processing device 1 is covered by a rear case 4 and a front case 5 to prevent easy access to the interior. The functional unit including the front case 5 can be removed from the rear case 4. A lock 6 secures the front case 5 to the rear case 4, preventing the functional unit including the front case 5 from being removed from the rear case 4. Access to the interior of the banknote processing device 1 is restricted by the lock 6. The lock 6 is unlocked with a key corresponding to the lock 6. A shutter 7 can open and close the withdrawal slot 3.

[0013] Next, the main configuration of the banknote handling machine 1 will be described with reference to Fig. 1. Fig. 1 is a diagram illustrating the internal configuration of the banknote handling machine.

[0014] In the banknote processing device 1, functional units that identify, transport, store, etc. banknotes are covered by a rear case 4 and a front case 5. The front case 5 is provided with a banknote deposit slot 2, a banknote withdrawal slot 3, and a shutter 7 that opens and closes the withdrawal slot 3.

[0015] An opening is formed in the front case 5, and a deposit slot 2 for inserting banknotes is disposed therein. Banknotes are inserted from the deposit slot 2 in the direction of the deposit recognition unit 15, that is, from left to right in FIG. 1, and are transported.

[0016] The first guide plate 10 is a plate that guides banknotes from the deposit slot 2 to the back. The second guide plate 11 is disposed opposite the first guide plate 10, and together with the first guide plate 10, forms a banknote passage that guides banknotes from the deposit slot 2 to the back. Banknotes are transported with their front or back faces facing the first guide plate 10.

[0017] Presser plate 12 is biased by spring 13 toward first guide plate 10 and presses banknotes against first guide plate 10. A part of first separation roller 14 protrudes from a through-hole provided in first guide plate 10. First separation roller 14 is disposed opposite presser plate 12. First separation roller 14 is driven by a motor (not shown), and conveys banknotes one by one in order, starting from the banknote on the first guide plate 10 side.

[0018] The second separation roller 16 protrudes from a through hole formed in the first guide plate 10 and comes into contact with the third separation roller 17. The second separation roller 16 is driven by a motor (not shown). The third separation roller 17 does not rotate in the direction in which the banknotes are transported. When multiple banknotes are inserted, the banknote closest to the first guide plate 10 is sandwiched between the second separation roller 16 and the third separation roller 17 and transported. The separation unit is a mechanism located between the deposit slot 2 and the deposit unit conveyor belt 19, which separates multiple stacked banknotes one by one and hands them over to the deposit unit conveyor belt 19.

[0019] The depositing section conveying belt 19 is looped around depositing section pulleys 18 on both ends, one of which is driven by a motor (not shown), to drive the depositing section conveying belt 19. The depositing section pinch rollers 20 are biased in the direction of the depositing section conveying belt 19. The banknotes separated into individual sheets are pinched between the depositing section pinch rollers 20 and the depositing section conveying belt 19 and conveyed.

[0020] The identification sensor 21 is disposed in the region between the deposit section pinch rollers 20 disposed at both ends. The identification sensor 21 is a sensor for identifying the denomination of deposited banknotes. The denomination of banknotes transported by the deposit section pinch rollers 20 and the deposit section transport belt 19 is identified by the identification sensor 21. The portion where this identification sensor 21 is disposed is referred to as the identification section. Depending on the denomination identified by the identification sensor 21, the banknotes are stored or discharged.

[0021] The deposit section inlet / outlet guide 22 is a curved conveyance path for allowing banknotes to enter the annular conveyance path of the circulation unit 23. The deposit recognition unit is connected to the annular conveyance path of the circulation unit 23 by the deposit section inlet / outlet guide 22.

[0022] Next, the circular transport path along which the banknotes in the circulation unit 23 are transported will be described.

[0023] The circulation unit 23 has a first curved conveyance path 24 arranged at the top and a second curved conveyance path 25 arranged at the bottom, with a banknote conveyance path connected between them by a straight conveyance path. This conveyance path is a circulation path that allows banknotes to be circulated and conveyed. The straight conveyance paths are a conveyance path along the first conveyance belt 26 and a conveyance path along the second conveyance belt 27. The circulation section pinch rollers 28 are rollers that are biased to the first conveyance belt 26 and the second conveyance belt 27, and multiple rollers are provided. Banknotes are pinched and conveyed by the first conveyance belt 26, the second conveyance belt 27, and the circulation section pinch rollers 28 biased thereto. The first conveyance belt 26 and the second conveyance belt 27 are driven and rotated by a motor (not shown), and the circulation section pinch rollers 28 biased thereto rotate together.

[0024] In addition to the deposit recognition unit 15, a dispensing unit 37 that dispenses banknotes, a first storage unit 40 that stores banknotes of a first denomination, and a reject unit that stores collected banknotes are connected to a linear transport path along the first transport belt 26 on one side of the circular transport path of the circulation unit 23. On this linear transport path on one side, a first branching plate 29, a second branching plate 30, and a third branching plate 31 that can change the direction of movement of banknotes are arranged corresponding to the deposit recognition unit 15, the dispensing unit 37, the first storage unit 40, and the reject unit 41. Each of the first branching plate 29, the second branching plate 30, and the third branching plate 31 is driven by an actuator (not shown) to move banknotes in a desired direction. The first branching plate 29 either directs banknotes moving along the linear transport path in a straight line or guides them to the dispensing unit 37. The second branching plate 30 either allows banknotes moving on the linear transport path to go straight or guides them to the first storage unit 40. The second branching plate 30 also guides banknotes from the first storage unit 40 to the linear transport path so that they can be withdrawn. The third branching plate 31 either allows banknotes moving on the linear transport path to go straight or guides them to the reject unit 41.

[0025] A second storage unit 44 for storing banknotes of a second denomination and a third storage unit 47 for storing banknotes of a third denomination are connected to a linear transport path along the second transport belt 27 on the other side of the circular transport path of the circulation unit 23. A fourth branching plate 32 and a fifth branching plate 33, which can change the direction of movement of banknotes, are arranged on the other linear transport path corresponding to the second storage unit 44 and the third storage unit 47. The fourth branching plate 32 and the fifth branching plate 33 are driven by an actuator (not shown) to move banknotes in a desired direction. The fourth branching plate 32 either guides banknotes moving on the other linear transport path in a straight line or guides them to the second storage unit 44. The fourth branching plate 32 also guides banknotes from the second storage unit 44 to the other linear transport path for withdrawal. The fifth branching plate 33 either guides banknotes moving on the other linear transport path in a straight line or guides them to the third storage unit 47. The fifth branch plate 33 also guides the banknotes from the third storage unit 47 to the other linear transport path for dispensing.

[0026] Dispensing tray 35 provided in dispensing unit 37 stores banknotes to be dispensed in a stacked manner. Banknotes stored in dispensing tray 35 in a stacked manner can be removed from dispensing port 3. When shutter 7 is open, banknotes stored in dispensing tray 35 can be removed from dispensing port 3, and when shutter 7 is closed, banknotes cannot be removed from dispensing port 3. Banknotes guided by first branch plate 29 from the annular transport path of circulation unit 23 are transported to dispensing tray 35 by dispensing unit belt 34. After all banknotes to be dispensed are stacked on dispensing tray 35, shutter 7 is switched from a closed state to an open state, and the banknotes become available for removal.

[0027] The first storage unit 40 is a storage unit that can store banknotes of a first denomination in a stacked state and feed and discharge the stored banknotes one by one. The second branch plate 30 is driven to one of the following positions: a position that guides banknotes from the transport path to the first storage unit 40, a position that transports banknotes along the transport path, or a position that guides banknotes from the first storage unit 40 to the transport path. The transport direction of the banknotes is determined depending on the position. The first storage unit drive roller 38 is driven by a motor (not shown). The first storage unit pinch roller 39 is biased by the first storage unit drive roller 38 and rotates together with the first storage unit drive roller 38 to pinch and transport the pinched banknotes. The first storage unit drive roller 38 can change its rotation direction, and banknotes are stored in or discharged from the first storage unit 40 depending on the rotation direction.

[0028] The reject unit 41 can store banknotes of the denomination to be collected in a stacked state. For example, it stores old banknotes, banknotes with low circulation, etc. The third branch plate 31 is driven to either a position where it guides banknotes from the conveyance path to the reject unit 41, or a position where it conveys banknotes along the conveyance path, and the direction of conveyance of the banknotes is determined depending on the position. When storing banknotes in the reject unit 41, the third branch plate 31 is driven to change the direction of guiding the banknotes and guide them from the conveyance path toward the reject unit 41. The reject unit drive roller 42 is driven by a motor (not shown). The reject unit pinch roller 43 is biased by the reject unit drive roller 42 and rotates together with the reject unit drive roller 42, pinching the banknotes together with the reject unit drive roller 42 and conveying the pinched banknotes. The conveyed banknotes are stored in a stacked state in the reject unit 41.

[0029] The second storage unit 44 is a storage that can store banknotes of a second denomination in a stacked state and can feed and discharge the stored banknotes one by one. The third storage unit 47 is a storage that can store banknotes of a third denomination in a stacked state and can feed and discharge the stored banknotes one by one. The second storage unit 44 and the third storage unit 47 have the same mechanism as the first storage unit 40, so they will be described briefly.

[0030] The second storage section drive roller 45, the second storage section pinch roller 46, and the fourth branch plate 32 of the second storage section 44 correspond to the first storage section drive roller 38, the first storage section pinch roller 39, and the second branch plate 30 of the first storage section 40, and operate in the same manner. The third storage section drive roller 48, the third storage section pinch roller 49, and the fifth branch plate 33 of the third storage section 47 correspond to the first storage section drive roller 38, the first storage section pinch roller 39, and the second branch plate 30 of the first storage section 40, and operate in the same manner.

[0031] A first light-emitting unit 50 that emits light and a first detection unit 51 that detects the incident light are arranged facing each other across the linear transport path along the second transport belt 27 of the circulation unit 23. Furthermore, a similar second light-emitting unit 52 and second detection unit 53 are arranged facing each other downstream in the direction of transport of the banknotes. The light emitted from the first light-emitting unit 50 can be detected by the first detection unit 51. The light emitted from the first light-emitting unit 50 may reach the first detection unit 51 unobstructed, or it may reach the first detection unit 51 after passing through the banknotes. When multiple banknotes are stacked, the light that passes through the banknotes is attenuated according to the number of stacked banknotes. The first detection unit 51 can detect not only the presence or absence of passing banknotes but also whether the passing banknotes are overlapped. The pair of the first light-emitting unit 50 and the first detection unit 51 constitutes one sensor unit. Similarly, a pair of second light emitting unit 52 and second detecting unit 53 constitutes one sensor unit.

[0032] Next, each functional unit housed in the case of the banknote processing device will be described with reference to Figures 3 and 4. Figure 3 is the first diagram for explaining the configuration of the banknote processing device. Figure 3 shows the state in which each functional unit is housed in the case.

[0033] The banknote processing device 1 has functional units housed inside an interior surrounded by a rear case 4 and a front case 5. The main functional units are a deposit recognition unit 15 that receives banknotes and identifies the denomination of the deposited banknotes, a dispensing unit 37 that dispenses banknotes, a first storage unit 40 that stores and dispenses banknotes of a first denomination, a reject unit 41 that stores banknotes to be collected, a circulation unit 23 that circulates banknotes, a second storage unit 44 that stores and dispenses banknotes of a second denomination, and a third storage unit 47 that stores and dispenses banknotes of a third denomination. For example, the first denomination is a 10,000 yen banknote, the second denomination is a 1,000 yen banknote, the third denomination is a 5,000 yen banknote, and the collected banknotes are 2,000 yen banknotes, which are in very low circulation.

[0034] The deposit recognition unit 15, the withdrawal unit 37, the first storage unit 40, the reject unit 41, and the front case 5 are fixed to a front unit support unit 62. A deposit slot 2 and a withdrawal slot 3 are arranged in the front case 5. The deposit recognition unit 15 includes the deposit slot 2, and the withdrawal unit 37 includes the withdrawal slot 3. The functional units fixed to the front unit support unit 62 are collectively referred to as a front unit 56. The second rail 61 is arranged along the depth direction of the banknote processing device 1. The front unit support unit 62 slides along the second rail 61 in the depth direction of the banknote processing device 1, that is, left and right in the plane of FIG. 3.

[0035] The circulation unit 23 is rotatably attached to the middle unit support part 63 via a rotation shaft 65. The circulation unit 23 includes a first curved conveyance path 24, a second curved conveyance path 25, a first conveyance belt 26, a second conveyance belt 27, a linear conveyance path arranged along the second conveyance belt 27, and a first light emitter 50 and a second light emitter 52 fixed to face the conveyance path. The conveyance path has a first conveyance wall 67 and a second conveyance wall 68 arranged to face each other, and banknotes are conveyed therebetween. The first light emitter 50 is fixed to the first conveyance wall 67, and the second light emitter 52 is fixed to the second conveyance wall 68. The circulation unit 23 fixed to the middle unit support part 63 is referred to as a middle unit 57.

[0036] The second storage section 44 and the third storage section 47 are fixed to the rear unit support section 64. The second storage section 44 and the third storage section 47 are provided with a second transport wall 68 arranged opposite the first transport wall 67 of the circulation unit 23. The first transport wall 67 and the second transport wall 68 face each other at a predetermined distance, thereby forming a linear transport path. The first detection section 51 and the second detection section 53 are fixed to the second transport wall 68. The second transport wall 68 is provided with an opening that forms a second storage section inlet / outlet 54, which is an entrance / exit for banknotes in the second storage section 44, and an opening that forms a third storage section inlet / outlet 55, which is an entrance / exit for banknotes in the third storage section 47. The second conveying wall 68, the first detection section 51, the second detection section 53, the second storage section 44 including the second storage section entrance / exit 54, and the third storage section 47 including the third storage section entrance / exit 55 are fixed to the rear unit support section 64, and are collectively referred to as the rear unit 58.

[0037] The rear unit support part 64, the middle unit support part 63, and the second rail 61 are fixed to the base frame 60. The base frame 60 has an engagement part (not shown) that movably engages with the first rail 59, and the base frame 60 can be moved along the first rail 59. The first rail 59 is arranged along the depth direction of the banknote processing device 1, and the first rail 59 and the rear case 4 are fixed to each other. By moving the base frame 60, each functional unit fixed to the base frame 60 can be stored in the rear case 4 or pulled out of the rear case 4.

[0038] Fig. 4 is a second diagram illustrating the configuration of the banknote handling apparatus, showing a state in which each functional unit is removed from the case.

[0039] The front unit 56 , the middle unit 57 , and the rear unit 58 fixed to the base frame 60 can move along the first rail 59 and be pulled out from the rear case 4 .

[0040] The front unit 56 fixed to the front unit support part 62 can be pulled out along the second rail 61. The pulled-out front unit 56 is separated from the middle unit 57, separating the banknote transport path formed by the side surfaces of the front unit 56 and the middle unit 57, and exposing the side surfaces of the front unit 56 and the middle unit 57.

[0041] The middle unit 57 is rotatably attached to a rotation shaft 65, and can separate the circulating unit 23 from the rear unit 58, separating the banknote transport path formed at a predetermined interval by both side surfaces and exposing both side surfaces. When the circulating unit 23 is in an upright position 66 shown by the dashed line, the banknote transport path is formed by the circulating unit 23 and the rear unit 58. At this time, the first light-emitting unit 50 and the first detection unit 51 face each other, and the second light-emitting unit 52 and the second detection unit 53 face each other.

[0042] The first transport wall 67 and the second transport wall 68 can be moved relatively using the movement mechanisms of the above-mentioned units. The first transport wall 67 and the second transport wall 68 can transition between a transport path forming state in which the first transport wall 67 and the second transport wall 68 are opposed to each other, and a transport path exposing state in which the first transport wall 67 and the second transport wall 68 are no longer opposed to each other and are exposed.

[0043] As described above, the transport path is provided with a moving mechanism capable of transitioning between a transport path formation state and a transport path exposure state. This moving mechanism is intentionally provided with play to accommodate manufacturing errors and installation errors of each component. While this allows for smooth movement of each component, misalignment may occur if the first light-emitting unit 50 and the first detection unit 51 do not face each other. To address this issue, an automatic adjustment mechanism is provided for the first light-emitting unit 50 and the first detection unit 51, or the second light-emitting unit 52 and the second detection unit 53, to accommodate fluctuations in the detection level of the first detection unit 51 caused by such misalignment. This reduces or eliminates the effort required to adjust the sensor position and level, as well as detection errors. Furthermore, since the first light-emitting unit 50 and the first detection unit 51, or the second light-emitting unit 52 and the second detection unit 53, can be easily and accurately attached to the desired positions of the first transport wall 67 and the second transport wall 68, much of the play can be considered intentionally provided in the moving mechanism capable of transitioning between a transport path formation state and a transport path exposure state.

[0044] The linear transport path formed around the circulating unit 23 can be formed or separated by moving the front unit 56, middle unit 57, and rear unit 58. This configuration makes it easy to remove banknotes even if they become jammed in the transport path, and also makes it easy to clean the rollers and belts. The first light-emitting unit 50 and the second light-emitting unit 52, which detect banknotes being transported, are fixed to the first transport wall 67 of the circulating unit 23, and the first detection unit 51 and the second detection unit 53 are fixed to the second transport wall 68 of the rear unit 58. Each time the transport path formed by the circulating unit 23 and the rear unit 58 is separated and reconfigured, a misalignment may occur between the light-emitting unit and the detection unit. Having a configuration to accommodate this misalignment is preferable because it facilitates various adjustments.

[0045] Next, the arrangement of sensors for detecting bills being conveyed will be described with reference to FIGS.

[0046] FIG. 5 is a first diagram illustrating the arrangement of the sensor units of the banknote processing device. The first detection unit 51 and the second detection unit 53, which are arranged on the rear unit 58 side, will be described using FIG. 5. The rear unit 58 is provided with a second transport wall 68 that forms a linear transport path for banknotes. The second transport wall 68 is provided with openings for a second storage unit inlet / outlet 54, which is an inlet / outlet for banknotes in the second storage unit 44, and a third storage unit inlet / outlet 55, which is an inlet / outlet for banknotes in the third storage unit 47. The second transport wall 68 also has an opening through which the circulating unit pinch roller 28 can protrude, and the circulating unit pinch roller 28 protrudes from the opening so as to be able to come into contact with the transported banknotes. The fourth branch plate 32, the second storage unit drive roller 45, and the second storage unit pinch roller 46 are arranged at positions corresponding to the second storage unit inlet / outlet 54. A fifth branch plate 33, a third storage section drive roller 48, and a third storage section pinch roller 49 are arranged at a position corresponding to the third storage section entrance / exit 55. The fourth branch plate 32 and the fifth branch plate 33 are arranged so as to be able to protrude and retract from openings provided in the second conveying wall 68.

[0047] The first detection unit 51 is fixed to the back side of the second transport wall 68 at a position corresponding to the widthwise end of the banknote being transported on the transport path. In the example of FIG. 5, the first detection unit 51 is arranged at a position corresponding to both widthwise ends of the banknote being transported on the transport path, but the first detection unit 51 may be arranged on only one widthwise side. The first detection unit 51 may be provided with a transparent cover flush with the second transport wall 68 to prevent the adhesion of dust and other foreign matter. The second transport wall 68 may also be formed from a transparent resin. The second detection unit 53 is arranged in a different position in the banknote transport direction, but is arranged in the same manner as the first detection unit 51. The first detection unit 51, which is arranged at a position corresponding to the widthwise end of the banknote being transported on the transport path, is capable of detecting blank portions of the banknote. The attenuation of transmitted light varies depending on the location of the color, such as a pattern, of the banknote, so the detection value fluctuates accordingly, making stable detection impossible. The margins arranged along the edges of the bill are formed over the entire circumference of the bill, and by using these margins as the detection area, stable detection is possible.

[0048] FIG. 6 is a second diagram illustrating the arrangement of the sensor unit of the banknote processing device. The first light-emitting unit 50 and the second light-emitting unit 52 arranged on the circulation unit 23 side will be described using FIG. 6. The circulation unit 23 is provided with a first transport wall 67. The first transport wall 67 is a transparent resin plate. The first transport wall 67 may also be made of transparent glass. The first transport wall 67 is provided with a through-hole for allowing the second transport belt 27 to protrude, and the second transport belt 27 protrudes from the opening of the through-hole. By protruding the second transport belt 27 from the first transport wall 67, it can come into contact with banknotes 8 indicated by dashed lines. The banknotes 8 are transported along the second transport belt 27. The first light-emitting unit 50 is fixed to the back side of the first transport wall 67 at a position corresponding to the widthwise end of the banknote being transported on the transport path. In the example of Figure 6, the first light-emitting unit 50 is arranged at positions corresponding to both widthwise ends of the banknote being transported on the transport path, but the first light-emitting unit 50 may be arranged on only one widthwise side. The first light-emitting unit 50 is fixed to the side of the first transport wall 67 opposite the banknote transport surface, which prevents the adhesion of dust and other particles. The second light-emitting unit 52 is arranged in the same position as the first light-emitting unit 50, although at a different position in the banknote transport direction. By making the first transport wall 67 transparent, a protective member such as a transparent cover to protect the first light-emitting unit 50 is not required, and the interior can be observed, improving maintainability.

[0049] Fig. 7 is a third diagram illustrating the arrangement of the sensor units of the banknote processing device, in which the first transport wall 67 of the circulation unit 23 is removed.

[0050] The second conveyor belt 27 is wound around a drive pulley 72 and a driven pulley 74. The driven pulley 74 is fixed to a driven shaft 73, which is rotatably supported by the frame of the circulation unit 23. The drive pulley 72 is fixed to a drive shaft 71, which is rotatably supported by the frame of the circulation unit 23. A drive gear 70 is fixed to the drive shaft 71. The drive gear 70 is driven by a motor (not shown). The second conveyor belt 27 is driven by driving the drive gear 70. The first light-emitting unit 50 and the second light-emitting unit 52 are fixed to the first conveyor wall 67, are disposed inside the circulation unit 23, and are covered by the first conveyor wall 67.

[0051] Next, the operation of the first light-emitting unit 50 and the first detection unit 51 will be described. Fig. 8 is a first diagram illustrating an overview of the sensor unit of the banknote processing device. The explanation will be given using the first light-emitting unit 50 and the first detection unit 51, and the other sensor units will be omitted as they are similar.

[0052] The first light-emitting unit 50 emits a constant amount of light in an irradiation direction 80 indicated by an arrow. The first detection unit 51 receives the light emitted from the first light-emitting unit 50 and outputs a signal at a level corresponding to the amount of light received. A view of the light-emitting surface side of the first light-emitting unit 50 is shown in enlarged light-emitting unit diagram 78. The light-emitting surface of the first light-emitting unit 50 is light-shielded except for a light-exiting frame 75, and light is emitted from the light-exiting frame 75. A view of the light-receiving surface side of the first detection unit 51 is shown in enlarged detection unit diagram 79. The light-receiving surface of the first detection unit 51 is light-shielded except for a light-entering frame 76, and light entering through the light-entering frame 76 is detected.

[0053] The light-emitting frame 75 and the light-entering frame 76 are rectangular, with a predetermined width and a length that is at least twice as long in the short direction. The light-emitting frame 75 and the light-entering frame 76 do not need to be identical in shape, but a rectangular shape with a predetermined width is preferable. The first light-emitting unit 50 and the first detection unit 51 are used in an opposing position. When facing each other, the longitudinal direction of the light-emitting frame 75 and the longitudinal direction of the light-entering frame 76 intersect at right angles, with the opposing areas intersecting at their center, which is the detection area of ​​the first detection unit 51. Light emitted from the first light-emitting unit 50 passes only through the light-emitting frame 75. The light that passes through the light-entering frame 76, which is perpendicular to the light-emitting frame 75, is detected by the first detection unit 51, which outputs a signal corresponding to the amount of received light. When the relative positions of the first light-emitting unit 50 and the first detection unit 51 are shifted, as long as the areas of the detection regions remain the same, the detection level of the first detection unit 51 does not fluctuate significantly compared to when the first light-emitting unit 50 and the first detection unit 51 are directly facing each other, eliminating the need for position adjustments or level adjustments. When the same light-emitting frame 75 and light-entering frame 76 are used, the tolerance for relative positional shifts between the first light-emitting unit 50 and the first detection unit 51 can be maximized by arranging the light-emitting frame 75 and the light-entering frame 76 so that their longitudinal directions are perpendicular to each other. In other words, the output signal does not fluctuate significantly when the light-entering frame 76 moves within the range of the longitudinal length of the light-emitting frame 75, and the output signal does not fluctuate significantly when the light-emitting frame 75 moves within the range of the longitudinal length of the light-entering frame 76, eliminating the need for position adjustments or level adjustments. It is preferable to arrange the longitudinal direction of one of the light exit frame 75 and the light entrance frame 76 along the banknote transport direction, and the longitudinal direction of the other frame in a direction perpendicular to the banknote transport direction. Since the length of the frame in the short side direction can be increased to accommodate misalignment of the short side of the transported banknote during transport, a large area can be secured to accommodate this.

[0054] Banknotes 77 are transported between the first light-emitting unit 50 and the first detection unit 51. Figure 8 illustrates a case where two banknotes 77 are transported with some of them overlapping. Sensor level 83 indicates the detection level of the first detection unit 51 at each part of the banknote when the banknote 77 moves between the first light-emitting unit 50 and the first detection unit 51. The sensor level 83 in the part where there is no banknote is a level indicating 0. In the one-note area 81, which is the part where no banknotes are overlapping, the sensor level 83 is a level between the level range for one banknote. In the two-note area 82, which is the part where the banknotes are overlapping, the sensor level 83 is a level between the level range for two banknotes.

[0055] Light emitted from the first light-emitting unit 50 passes through the banknotes and reaches the first detection unit 51. The detection level of the first detection unit 51 decreases in stages depending on the number of overlapping banknotes. The level range for one banknote is the allowable range of the detection level of transmitted light when no banknotes are overlapping, i.e., the marginal part of one banknote, and is a range whose value has been determined in advance through experiments, calculations, etc. The level range for two banknotes is the allowable range of the detection level of transmitted light when two banknotes are overlapping, the marginal part of two banknotes, and is a range whose value has been determined in advance through experiments, calculations, etc.

[0056] The first light-emitting unit 50 and the first detection unit 51 detect the conveyed banknote and input the result to a control means (not shown). If the sensor level 83 is outside the level range for one banknote, the control means determines that some kind of problem has occurred and performs processing according to the detection level. For example, the conveyed banknote is stored in the reject unit 41 (see FIG. 1). The length of the conveyed banknote can also be measured by the first light-emitting unit 50 and the first detection unit 51. For example, the control means receives an output signal from an encoder (not shown) provided in a drive mechanism for driving the second conveyor belt 27. The control means calculates the movement amount of the second conveyor belt 27 based on the input output signal. The control means can calculate the length of the conveyed banknote from the movement amount of the second conveyor belt 27 while the sensor level 83 is within the level range for one banknote. If the calculated length is within a predetermined banknote length tolerance, there is no problem. However, if it is outside the tolerance, it is determined that a problem has occurred, such as a crease, tear, or denomination of the banknote, and an appropriate process is performed, such as storing the banknote in the reject unit 41 (see FIG. 1). If the first light-emitting unit 50 and the first detection unit 51 continue to detect the transported banknote, i.e., if the first detection unit 51 continues to output a signal other than a level indicating 0, the control unit can control the transport of the detected banknote to remain in the circulation path and not be discharged. The detection level of the first detection unit 51 can also change due to dirt, in which case the banknote can be stored in the reject unit 41 (see FIG. 1). In this way, the control unit operates according to a pre-stored program, inputs the detection results of sensors such as the first detection unit 51, and performs an appropriate process based on the results.

[0057] Next, the detection range of the sensor unit will be described with reference to Fig. 9. Fig. 9 is a second diagram illustrating an overview of the sensor unit of the banknote processing device.

[0058] The light-emitting surface of the first light-emitting unit 50 shown by the dashed line and the light-receiving surface of the first detection unit 51 shown by the solid line are opposed to each other, but are not directly facing each other, and a state in which only part of them are opposed will be described.

[0059] The light exit frame 75 and the light entrance frame 76 are rectangular and have the same shape. When the first light-emitting unit 50 and the first detection unit 51 are completely opposed to each other, the longitudinal center of the light exit frame 75 and the longitudinal center of the light entrance frame 76 overlap, and the detection area of ​​the first detection unit 51 becomes a square whose one side is the length in the short direction.

[0060] Furthermore, to accurately detect margins even when banknotes are conveyed with a misalignment in a direction intersecting the conveyance direction, the size of the light-emitting frame 75 or the light-entering frame 76 must be limited. The longitudinal length of the light-emitting frame 75 or the light-entering frame 76 is preferably two to seven times the lateral length, and more preferably 2.5 to 5 times the lateral length. In this example, the long sides of the light-emitting frame 75 and the light-entering frame 76 are three times the lateral length. If the lateral length is shortened, the area of ​​the intersection region 69 becomes smaller, making it difficult to ensure the amount of light required to detect banknotes and reducing detection accuracy. To detect margins, the longitudinal length of the light-emitting frame 75 must be shorter than the width of the margin of the banknote to be detected. The length is preferably 1 / 4 to 9 / 10 of the lateral length, and more preferably 3 / 10 to 7 / 10 of the lateral length. When the ratio of the short side to the long side of the light exit frame 75 or the light entrance frame 76 approaches 1, it becomes difficult to accommodate misalignment between the first light-emitting unit 50 and the first detection unit 51. By configuring the first light-emitting unit 50 and the first detection unit 51 in this manner, even if the first light-emitting unit 50 and the first detection unit 51 are misaligned relative to each other, or even if the banknote is displaced in a direction intersecting the conveyance direction, the intersection area 69 can be positioned at a position corresponding to the margin of the conveyed banknote, enabling appropriate detection of the banknote. Although the light exit frame 75 and the light entrance frame 76 have been described as having the same shape, they do not have to have the same shape, and any shape that keeps the area of ​​the intersection area 69 constant regardless of any misalignment can be used, thereby suppressing fluctuations in the detection level.

[0061] The first light-emitting unit 50 and the first detection unit 51 are disposed opposite each other. The first detection unit 51 receives light emitted from the first light-emitting unit 50 and outputs a signal corresponding to the amount of light received. The light-emitting frame 75 of the first light-emitting unit 50 limits the area of ​​the emitted light, and the light-receiving frame 76 of the first light-emitting unit 50 limits the area of ​​the received light. The first light-emitting unit 50 and the first detection unit 51 form the light-emitting frame 75 and the light-receiving frame 76 in a rectangular shape, and are disposed so that their longitudinal directions intersect. The opposing areas of the light-emitting frame 75 and the light-receiving frame 76 are rectangular, with the lengths of their short sides as their sides. This area becomes the detection area of ​​the first detection unit 51, narrowing the detection range. As long as the areas of these areas are the same, even if the first light-emitting unit 50 and the first detection unit 51 are misaligned, the detection results of the first detection unit 51 will not fluctuate significantly. Furthermore, even if a banknote to be detected is conveyed while displaced in a direction intersecting the conveyance direction, the first detection unit 51 can appropriately detect the banknote because the detection area is located at a position corresponding to the margin of the banknote. The area where the light exit frame 75 and the light entrance frame 76 face each other becomes the detection area of ​​the first detection unit 51, and the margin of the banknote can be detected within a range where the areas of the facing areas of the light exit frame 75 and the light entrance frame 76 are the same. This eliminates the need to adjust the positions of the first light-emitting unit 50 and the first detection unit 51 in response to a deviation in the relative positions of the first light-emitting unit 50 and the first detection unit 51. Furthermore, this eliminates the need to adjust the output of the first light-emitting unit 50 or the detection level of the first detection unit 51. Note that if the degree of positional misalignment is large, the area of ​​the intersection area 69 between the light exit frame 75 and the light entrance frame 76 will be smaller than the predetermined area, reducing the detection level of the first detection unit 51 and making normal detection impossible. This necessitates position adjustment or level adjustment.

[0062] The light exit frame 75 of the first light-emitting unit 50 and the light entrance frame 76 of the first detection unit 51 can also be said to be an automatic adjustment mechanism arranged on the first light-emitting unit 50 and the first detection unit 51 to tolerate fluctuations in the detection level of the first detection unit 51 due to a positional misalignment that occurs when the first light-emitting unit 50 and the first detection unit 51 are not directly facing each other due to intentional play in the mechanism.

[0063] Next, the attachment of the first light-emitting unit 50 to the first transport wall 67 will be described with reference to Figs. 10 to 12. Fig. 10 is a first diagram illustrating the attachment portion of the sensor unit of the banknote processing device. The first transport wall 67 is made of transparent resin, and has a convex portion 85 formed on the back side along the outer diameter of the first light-emitting unit 50, so that the first light-emitting unit 50 can be fitted into a recess formed by the convex portion 85. Therefore, there is almost no relative positional misalignment between the first transport wall 67 and the first light-emitting unit 50 due to attachment.

[0064] The light-emitting unit main body 84 is a resin case, and a light-emitting element is fixed inside. A pressing plate 86 presses down on the light-emitting unit main body 84, and is fixed to the back surface of the first conveying wall 67 with screws 87. The light-emitting unit main body 84 is positioned by the protrusions 85, and is fixed to the back surface of the first conveying wall 67 with the pressing plate 86, which is fixed to the back surface of the first conveying wall 67. The light-emitting unit main body 84 is positioned and fixed to a predetermined position on the first conveying wall 67. The light-emitting unit main body 84 is positioned on the first conveying wall 67 with high precision, so there is almost no play at that time. The same is true for the light-receiving unit.

[0065] FIG. 11 is a second diagram illustrating the mounting portion of the sensor unit of the banknote processing device. It is a diagram illustrating a state in which the light-emitting unit main body 84 has been removed from FIG. 10 . A protrusion provided on the light-emitting unit main body 84 fits into the positioning hole 90. The first light-shielding plate 88 covers the light-emitting surface of the first light-emitting unit 50 and can block light except for the light-emitting frame 75. The first light-shielding plate 88 has an opening at the light-emitting frame 75, which allows light emitted from the first light-emitting unit 50 to pass through. The convex portion 85 is formed to correspond to the shape of the outer periphery of the first light-shielding plate 88. A portion protruding from the outer periphery is formed on the outer periphery of the first light-shielding plate 88. The protruding portion fits into the concave portion 89. The light-emitting unit main body 84 and the first light-shielding plate 88 can be fixed to a predetermined position on the rear side of the first conveying wall 67 with high precision.

[0066] FIG. 12 is a diagram illustrating an outline of the light-emitting unit of the sensor unit of the banknote processing device. The light-emitting unit main body 84 is provided with a protrusion 93 used for positioning when fixed. The first light-shielding plate 88 is provided with a convex portion 92 used for positioning when fixed. The irradiation range 91 shown by the dashed line is the range of light emitted from the first light-emitting unit 50, part of which is blocked by the first light-shielding plate 88, and light is emitted from the range of the light-emitting frame 75, which is an opening. The light-emitting frame 75 is located within the irradiation range 91.

[0067] FIG. 13 is a diagram illustrating an overview of the detection section of the sensor unit of the banknote processing device. The first detection section 51 is fixed to the rear side of the second transport wall 68 (see FIG. 5). The fixing method is the same as that described with reference to FIGS. 10 and 11, so a detailed description is omitted. The light receiving body 98, together with the second light blocking plate 94, is positioned on the rear side of the second transport wall 68 (see FIG. 5) and fixed by a presser plate. The light receiving body 98 of the first detection section 51 has two protrusions 99 used for positioning when fixing. The second light blocking plate 94 has a light entrance frame 76, which is an opening. The light entrance frame 76 is positioned on the second light blocking plate 94 so as to overlap with the incident range 95 of the sensor, and blocks other portions from light. The second light blocking plate 94 has holes and grooves corresponding to the shapes of the protrusions 99, allowing it to be positioned so that the light entrance frame 76 is within the incident range 95. The fixing portion 97 is a protrusion provided on the second light-shielding plate 94, and can be fitted into a corresponding recess on the back side of the second transport wall 68 (see FIG. 5). The erected portion 96 is a pressing plate for fixing the light-receiving body 98 to the back side of the second transport wall 68 (see FIG. 5) with a screw (not shown). The light-receiving body 98 is positioned on the second transport wall 68 with high precision, just like the light-emitting portion, so there is almost no play at that time. [Explanation of symbols]

[0068] 1. Banknote processing device 2 Deposit port 3 Withdrawal port 4 Rear case 5 Front case 6. Rock 7. Shutter 8 banknotes 10 First Information Board 11 Second Information Board 12 Presser plate 13 Spring 14 First separation roller 15 Deposit Identification Section 16 Second separation roller 17 Third separation roller 18. Receipt pulley 19. Deposit section conveyor belt 20 Pinch roller for deposit section 21 Identification sensor 22 Deposit section deposit and withdrawal guide 23 Circulation Unit 24 First curved conveying path 25 Second curved conveying path 26 First conveyor belt 27 Second conveyor belt 28 Circulation section pinch roller 29 First branch plate 30 Second branch plate 31 Third branch plate 32 Fourth branch plate 33 5th Branch Plate 34 Withdrawal belt 35 Dispensing tray 37 Withdrawal Department 38 First storage section drive roller 39 First storage compartment pinch roller 40 First storage section 41 Rejection Department 42 Reject section drive roller 43 Rejection section pinch roller 44 Second storage section 45 Second storage section drive roller 46 Second storage section pinch roller 47 Third storage section 48 Third storage section drive roller 49 Third storage compartment pinch roller 50 First light-emitting part 51 First detection unit 52 Second light-emitting part 53 Second detection unit 54 Second storage area entrance / exit 55 Third storage area entrance / exit 56 Front unit 57 Central Unit 58 Rear unit 59 First Rail 60 base frame 61 Second Rail 62 Front unit support 63 Central unit support 64 Rear unit support 65 Rotation axis 66 Upright position 67 First transport wall 68 Second transport wall 69 Intersection Area 70 Drive Gear 71 Drive shaft 72 Drive pulley 73 Driven axis 74 Driven pulley 75 Idemitsu frame 76 Light receiving frame 77 banknotes 78 Enlarged view of the light-emitting part 79 Enlarged view of the detection section 80 Irradiation direction 81 1 piece area 82 2-sheet area 83 Sensor Level 84 Light emitting unit body 85 Convex part 86 Presser plate 87 screws 88 1st light shielding plate 89 Recess 90 Positioning hole 91 Irradiation range 92 Convex part 93 Protrusion 94 2nd light shielding plate 95 Incident range 96 Standing section 97 Fixed part 98 Light receiving body 99 Protrusion

Claims

1. a conveyance path for conveying paper sheets; a storage container connected to the transport path for storing or feeding the paper sheets; a light emitting unit that is disposed on one side of the conveying path so as to sandwich the conveyed paper sheet and that emits light; a detection unit that is disposed on the other side of the conveyance path across which the conveyed paper sheet is sandwiched, facing the light emitting unit, receives light irradiated from the light emitting unit, and outputs a signal in accordance with the amount of light received; A paper sheet processing apparatus having: the light-emitting unit includes a light output frame having an opening with a first predetermined width in a short side direction, and an illumination area is controlled by the light output frame; the detection unit includes a light entrance frame having an opening with a second predetermined width in a short side direction, and the light receiving area is controlled by the light entrance frame; The light exit frame and the light entrance frame are opposed to each other with their longitudinal directions intersecting, and the light emitted from the light emitting unit and passing through the light exit frame and the light entrance frame is received by the detection unit.

2. the light output frame has a longitudinal direction longer than the first predetermined width, the light entrance frame has a longitudinal direction longer than the second predetermined width, 2. The paper sheet processing apparatus according to claim 1, wherein the longitudinal direction of the light exit frame and the longitudinal direction of the light entrance frame are opposed to each other and perpendicular to each other.

3. 3. The paper sheet processing apparatus according to claim 2, wherein the longitudinal direction of the light output frame is arranged along the transport direction of the paper sheets.

4. the transport path has a first transport wall and a second transport wall, a movement mechanism that moves the first conveying wall and the second conveying wall relatively to each other so as to be able to transition between a conveying path forming state in which the first conveying wall and the second conveying wall are opposed to each other and the paper sheets are conveyed therebetween, and a conveying path exposing state in which the first conveying wall and the second conveying wall are released from being opposed to each other and are exposed; 4. The paper sheet processing apparatus according to claim 1, wherein the light emitting unit is disposed on the first transport wall, and the detecting unit is disposed on the second transport wall.

5. The light emitting unit and the detection unit are The sheet is disposed at a position corresponding to an end of the sheet on the conveying path, 5. The sheet processing apparatus according to claim 4, wherein a margin formed at an end along an edge of the sheet being transported on the transport path is used as the detection area.

6. At least one of the first transport wall and the second transport wall is transparent, The paper sheet processing apparatus according to claim 4 , wherein the light emitting unit or the detecting unit is fixed to a surface of the first transport wall or the second transport wall opposite to a surface facing the paper sheets.

7. The paper sheet is a banknote, a deposit port for depositing the banknotes; a storage container connected to the transport path for storing or feeding the paper sheets; an identification unit that identifies the denomination of the banknotes deposited through the deposit port, The storage cabinets are arranged for each denomination, The paper sheet processing apparatus according to claim 6, wherein the banknotes whose denominations have been identified by the recognition unit are stored in the storage cabinets for each denomination.

8. the conveying path is a circulation path through which the paper sheets can circulate, 5. The paper sheet processing apparatus according to claim 4, wherein while the detection of the paper sheet by the light emitting unit and the detection unit continues, the paper sheet for which the detection continues is transported so as to remain within the circulation path.

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