JP2006124150A - Device for correcting skew of inserted paper sheets - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for correcting skew of inserted paper sheets capable of correctly detecting the skew of paper sheets and its skew direction by a simple structure, and correcting the skew. <P>SOLUTION: The skew correcting device comprises a conveyor having a conveying passage, a light emission unit 3, a light reception unit 4, and a detection device 2 having a light introducing passage 51, a light outgoing passage 52, a light relaying passage 53, and a light guide body forming a bypass light guide passage 54 directly guided to the light reception unit. The light emission unit and the light introducing passage of the light guide body, and the light reception unit and the light outgoing passage of the light guide body are arranged opposite to each other across the conveying passage to detect the light quantity synthesizing the light quantity of the outgoing light a transmitted through the front end portion of the paper sheets passing through between the light emission unit and the light guide passage, the light quantity a1 of the outgoing light a transmitted through the front end portion of the paper sheets passing through between the outgoing passage and the light reception part, and the light quantity a2 of the outgoing light transmitted through the bypass light guide passage and directly incident on the light reception unit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention detects a skew of a paper sheet taken into a conveyance path and corrects the skew of the inserted paper sheet, and particularly detects a skew direction and a skew amount of the paper sheet. The present invention also relates to a skew correction device for an inserted paper sheet that can correct the skew of the paper sheet based on the detected data.

  In general, in a paper sheet transport apparatus arranged in a game hall or the like, paper is used for the purpose of transporting paper sheets of various sizes or for the purpose of making it easier to load paper sheets into the transport apparatus. The space for taking in leaves and the width of the transport path is wide. For this reason, as shown in FIG. 12 of Japanese Patent Application Laid-Open No. 2001-335196, a phenomenon may occur in which the paper is transported with a deviation from the center line of the transport path to the left or right, or is transported with an inclination to the center line. It was. This skew often causes a conveyance error such as a jam.

  In order to detect the skew of the paper sheet, in Japanese Patent Laid-Open No. 2001-335196, a plurality of optical sensors are arranged in the width direction of the transport path to detect the skew angle, which is the inclination of the transport posture of the paper sheet. Was. However, since the above-mentioned Japanese Patent Application Laid-Open No. 2001-335196 uses a plurality of optical sensors to detect the skew angle, the structure is complicated and disadvantageous in terms of cost. There is a possibility that a fine difference may occur in the adjustment, and it is difficult to accurately detect the skew angle. For this reason, the device for correcting the inclination of the paper sheet tends to be complicated by detecting the skew angle.

  Japanese Patent Laid-Open No. 2000-285278 discloses a skew detection device having a structure in which a skew of a paper sheet is detected by a set of optical sensors. This device emits light from a light emitting element. It is detected by the time difference between the time point when one end (the preceding side) of the paper sheet is detected and the time point when the other end (the delayed side) is detected. However, this apparatus can detect whether or not the paper sheet is skewed, but cannot determine in which direction it is skewed. For this reason, it has been difficult to control skew correction with a device for correcting the inclination of paper sheets.

Prior art documents related to the invention of this application include the following.
JP 2001-335196 A JP 2000-285278 A None

  The present invention has been made in order to solve the above-described problems of the prior art, and the object thereof is to provide a transport device having a transport path, a light emitting unit having a light emitting element, and a light receiving unit having a light receiving element. A light guide that relays the light emission introduction path, the light emission path, the light emission introduction path, and the light emission path; and a light guide that forms a bypass light guide path that directly guides the relay light guide path and the light receiving portion. And a light-emitting introduction path for the light-emitting section and the light guide body, and a light-emitting section and a lead-out path for the light guide body, which are opposed to each other across the transport path. The amount of emitted light that has passed through the leading end portion of the paper sheet that passes between, the amount of emitted light that has passed through the leading end portion of the paper sheet that passes between the lead-out path and the light receiving unit, and the bypass light guide path To detect the amount of light that is transmitted and combined with the amount of light emitted directly incident on the light receiving unit The skew correction device for the inserted paper sheet can detect the skew of the paper sheet and the skew direction thereof and can correct the skew of the paper sheet based on the result data. Is to provide.

  In order to solve the above-described problems, in the present invention, a transport device having a transport path, a light emitting unit having a light emitting element, a light receiving unit having a light receiving element, the light emission introducing path, a deriving path, and the light emitting introducing path, A light guide having a relay light guide that relays to the lead-out path, and a light guide that forms a bypass light guide that directly guides the relay light guide and the light receiving part, and the light emitting part and the light guide. The light-emission introducing path and the light-receiving unit and the light guide-leading path are arranged opposite to each other with the conveyance path interposed therebetween, and the light-emitting part that passes between the light-emitting part and the light-emission introducing path passes through the leading end portion of the paper sheet. The amount of emitted light, the amount of emitted light that has passed through the leading edge of the paper sheet passing between the derivation path and the light receiving unit, and the amount of emitted light that has passed through the detour light guide path and entered the light receiving unit directly. The amount of light synthesized is detected.

  As a result, the paper passes through between the light emitting part and the light emission introduction path and between the lead-out path and the light receiving part, and the light quantity of the part where the light quantity of the emitted light changes and the paper sheet like the bypass light guide path. By detecting the combined light quantity with the constant light quantity obtained without changing regardless of the type, the light receiving part detects the light quantity between the light emitting part and the light emission introducing path and between the light emitting part and the light receiving part. The presence / absence and skew direction of the inserted paper sheet can be determined, and the skew of the paper sheet can be corrected based on the result.

  According to another aspect of the invention, the detection device transmits the amount of the emitted light transmitted through the leading end portion of the paper sheet that has passed between the light emitting portion and the light emission introducing path or between the outlet path and the light receiving portion. A combined light amount of a light amount directly transmitted between the light emitting unit and the light emission introduction path or between the lead-out path and the light receiving unit, and a light amount of the emitted light which has passed through the bypass light guide path and directly enters the light receiving unit. Thus, the skew direction of the paper sheet is determined.

  As a result, the light emitted from the light emitting element is transmitted through the leading edge of the paper sheet, the transmitted light is separated into a plurality of light guides by the light guide, and individually incident on the light receiving element, and the difference in the amount of transmission Therefore, the skew of the paper sheet and its skew direction can be detected with an extremely simple structure, and the variation in the amount of transmission is relatively small. Can be detected accurately

  According to another aspect of the invention, the detection device transmits the amount of the emitted light transmitted through the leading end portion of the paper sheet that has passed between the light emitting portion and the light emission introducing path or between the outlet path and the light receiving portion. A combined light amount of a light amount directly transmitted between the light emitting unit and the light emission introduction path or between the lead-out path and the light receiving unit, and a light amount of the emitted light which has passed through the bypass light guide path and directly enters the light receiving unit. And the skew direction of the paper sheet according to the time difference between the time when the combined light amount of the leading edge portion of the paper sheet that has been detected and the detected light amount of the leading edge portion of the paper sheet that has passed through is detected. The skew amount is determined.

  As a result, the data value is determined in order to reliably detect the data after the paper sheet has passed between the light emitting part and the light emission introducing path of the transport device or between the lead-out path and the light receiving part. Even if the state of the part changes in the middle of passage, it is possible to reliably cope with it, and even when the transmittance is bad due to dirt, etc., there is relatively little variation in the amount of light received, and the skew and direction of the paper sheets are accurate Can be detected.

According to another aspect of the invention, when the detection device detects the combined light amount of the emitted light that has passed through the leading end portion of the paper sheet that first passes between the light emitting unit and the light emission introduction path, the detection device drives the transport device. Controlled.

  As a result, the skew of the paper sheet is corrected from the time when the light emission amount is first detected, so that the correction time can be shortened and the conveyance efficiency can be improved. Therefore, it is less likely to cause a conveyance abnormality such as a paper sheet being jammed in the conveyance device.

  In the next invention, the detection device controls the driving of the transport device based on the difference in detection time.

  As a result, the skew correction is performed after confirming the skew of the paper sheet, so that the correction accuracy is improved.

  In the next invention, the driving of the conveying device is controlled by stopping the conveying belt on the front end side of the paper sheet in which the first combined light amount is detected, out of the pair of left and right conveying belts provided in the conveying device. It has been done.

  As a result, the skew of the sheet can be corrected very easily by stopping one of the conveyor belts by a clutch operation or the like.

  As described above, according to the present invention, the transport device including the transport path, the light emitting unit including the light emitting element, the light receiving unit including the light receiving element, the light emission introducing path, the deriving path, and the light emitting introducing path are derived. A detecting device having a relay light guide that relays a path, and a light guide that forms a bypass light guide that directly guides the relay light guide and the light receiving unit, and the light emitting unit and the light guide Light emitted from the leading end portion of the paper sheet passing between the light emitting portion and the light emission introducing path, with the light emission introducing path and the light receiving portion and the light guide lead-out path facing each other across the transport path. , The amount of outgoing light that has passed through the leading edge of the paper sheet passing between the lead-out path and the light receiving unit, and the amount of outgoing light that has passed through the bypass light guide path and directly entered the light receiving unit. By detecting the combined amount of light, between the light emitting part and the light emission introducing path and between the outlet path and the light receiving part. The light receiving unit receives the combined light amount of the light amount of the portion where the light amount of the outgoing light changes and the constant light amount obtained without changing regardless of the paper shape such as the detour light guide path. The detection of the change in the combined light quantity caused by the detection of the presence of paper sheets inserted between the light emitting part and the light emission introducing path and between the lead out path and the light receiving part with a very simple structure It is an object of the present invention to provide a skew correction device for an inserted paper sheet that can determine the skew direction and correct the skew of the paper sheet based on the result.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing the arrangement of a skew correction device for inserted paper sheets according to an embodiment of the present invention, wherein (a) is a top view and (b) is an A- It is A sectional drawing. FIG. 2 is a perspective view showing the detection device of the present invention. FIG. 3 is an explanatory view showing a state of transporting paper sheets according to the first embodiment. FIG. 4 is a timing chart explaining the relationship between skew detection and skew correction in FIG. FIG. 5 is a flowchart showing the skew detection and correction process of FIG. FIG. 6 is an explanatory view showing a conveyance state of paper sheets according to another embodiment of the present invention. FIG. 7 is a timing chart explaining the relationship between skew detection and skew correction in the conveyance state of FIG. FIG. 8 is a flowchart showing the skew detection and correction process of FIG. FIG. 9 is a perspective view showing another configuration of the light guide.

  The skew correction apparatus 100 for an inserted paper sheet according to the present invention includes a transport device 1 and a detection device 2 that detects a skew state of the paper sheet. The transport device 1 has a drive source (not shown), and an insertion port (not shown) and a discharge port (not shown) for paper sheets M formed in the front and rear, and a pair of transport belts 11 and 12 between them. A detection sensor 14 is provided in the vicinity of the entrance of the conveyance path 13 while communicating through the path 13 and detecting whether or not a paper sheet has been inserted. When the detection sensor 14 detects the insertion of the paper sheet M, a drive source (not shown) is activated to drive the transport belts 11 and 12.

  As shown in FIGS. 1 and 2, the detection device 2 includes a light emitting unit 3 having a light emitting element (not shown) and a light receiving unit 4 having a light receiving element (not shown) on the upper side of the conveyance path 13. In addition, a light guide 5 that transmits and guides the emitted light a emitted from the light emitting unit 3 to the light receiving unit 4 is disposed below the conveyance path 13, that is, on the side opposite to the light emitting unit 3 and the light receiving unit 4. Has been established.

  The light emitting unit 3 includes a light emitting element (not shown) and a rectangular light emitting surface 31. Light emitted from a light emitting element (not shown) is emitted from the light emitting surface 31 toward the light guide 5. The shapes of the light emitting surface 31 and the light guide 5 are not limited to a rectangular shape, and may be a hemispherical shape, an elliptical shape, or the like as long as the light can be emitted uniformly to the light guide 5.

  The light receiving unit 4 is configured as a block body having a substantially inverted trapezoidal cross section, and has a light receiving surface 41 formed on the lower surface (light guide 5 side) and a light receiving surface 42 formed on the side surface. Further, on the upper surface, an outgoing outgoing light a (outgoing spectral a1 + outgoing spectral a2) obtained by combining the outgoing spectrum a1 received by the light receiving surface 41 and the outgoing spectrum a2 received by the light receiving surface 42 is received by a light receiving element (not shown). An irradiation surface 43 for irradiating is formed. The light receiving surface 41 receives the emission spectrum a1 of the emitted light a from the light emitting unit 3 through the lead-out path and the light receiving unit, and the light receiving surface 42 guides the emission spectrum a2 of the emitted light a from the light emitting unit 3. The light is directly received through the bypass light guide 54 formed integrally with the light body 5. Further, a reflective surface 44 is formed on the side surface facing the light receiving surface 42, and the outgoing spectrum a2 is reflected in the direction of the irradiation surface 43.

  The light guide 5 includes a light emission introduction path 51 formed facing the light emitting unit 3 across the conveyance path 13, a lead-out path 52 formed facing the light receiving unit 4, and the light emission introduction path 51 and the lead-out path. 52, a concave main body portion that is open upward and includes a relay light guide path 53 that connects and relays the lower portions of the relay light guide path 52, and a light receiving surface 42 that is branched from the lead-out path 52 side of the relay light guide path 53 and formed on the light receiving section 4. The reverse U-shaped light guide path 54 is integrally formed of synthetic resin or glass. Further, opposing reflection surfaces 53 a and 53 b are formed at the connection portion between the light emission introduction path 51 and the relay light guide path 53 and the connection portion between the relay light guide path 53 and the lead-out path 52. In the following description, SP1 is defined between the light emitting unit 3 and the introduction optical path 51, and SP2 is defined between the lead-out path 52 and the light receiving unit 4.

  The bypass light guide path 54 includes an upper lead-out path 54a whose output side is connected to the light receiving surface 42, a lower lead-in path 54b whose incident side is connected to the relay light guide path 53, and an upper lead-out path 54a and a lower lead-in path 54b. The relay light guide path 54e is connected by relay connection. Then, reflection surfaces 54d and 54c are formed opposite to the connection part between the upper lead-out path 54a and the relay light guide path 54e and the connection part between the relay light guide path 54e and the lower introduction path 54b.

  Next, the optical path of the emitted light a emitted from the light emitting unit 3 will be described in a state where there is no paper sheet in SP1 between the light emitting unit 3 and the introducing optical path 51 and SP2 between the outlet path 52 and the light receiving unit 4. . First, the emitted light a emitted from the light emitting unit 3 passes through the SP1 between the light emitting unit 3 and the introduction optical path 51 from the light emitting surface 31, and enters the light guide 5 from the end surface of the light emission introducing path 51 of the light guide 5. Transparent. The transmitted outgoing light a is transmitted into the relay light guide 53 by the reflecting surface 53a. Then, the outgoing light a is split into an outgoing spectrum a1 reflected and transmitted through the lead-out path 52 by the reflecting surface 53b of the relay light guide path 53 and an outgoing spectrum a2 transmitted through the lower introduction path 54b of the detour light guide path 54. The The emission spectrum a1 is emitted from the derivation path 52, passes through the SP2 between the derivation path 52 and the light receiving section 4, passes through the light receiving surface 41 of the light receiving section 4, enters the light receiving section 4, and receives light from the irradiation surface 43. It reaches a control unit (not shown). Further, the outgoing spectrum a2 is transmitted through the detour light guide path 54 in the order of the lower introduction path 54b, the lower reflection surface 54c, the relay light guide path 54e, the upper reflection surface 54d, and the upper lead-out path 54a. Then, the light is reflected by the reflecting surface 44 and reaches the light receiving control unit (not shown) from the irradiation surface 43.

  Therefore, the outgoing light a emitted from the irradiation surface 43 to the light receiving control unit (not shown) is a combination of the outgoing spectrum a1 and the outgoing spectrum a2. When there is no loss of light in SP2 between the light guide 5 and the light emitting unit 3 and the introduction light path 51, and between the lead out path 52 and the light receiving unit 4 when there is no paper, the light quantity is as follows. The amount of light is the same as the amount of emitted light a emitted from.

  When the paper sheet M transported into the transport path 13 passes SP1 between the light emitting section 3 and the light emission introduction path 51, passes through SP2 between the lead-out path 52 and the light receiving section 4, and emits light. When the light passes through SP1 between the part 3 and the light emission introducing path 51, SP2 between the lead-out path 52 and the light receiving part 4 simultaneously, and the emission spectrum a2 incident on the light receiving part 4 from the detour light guiding path 54 is combined to the irradiation surface 43. The amount of incident outgoing light a varies depending on various states.

Next, a means for detecting the skew state of the paper sheet will be specifically described.
The description will be made under the following conditions.
The amount of light a emitted from the light emitting unit 3 is 100.
There is no loss of light in SP2 between the light guide 5 and the light emitting section 3 and the introduction optical path 51 when there is no paper sheet, and between SP2 and the light extraction section 52 and the light receiving section 4.
The transmittance of paper sheets is 25%.
Spectral distribution to outgoing spectrum a2 is 20%. Then,
1: Naturally, in the state where the paper sheet does not reach SP1 between the light emitting unit 3 and the introduction light path 51 and SP2 between the lead-out path 52 and the light receiving unit 4, the light quantity of the incident light a to the light guide 5 is naturally The amount of light emitted to the light receiving unit 4 at 100% of the emitted light is also 100% (total of 80% for the outgoing spectrum a1 and 20% for the outgoing spectrum a2).
2: In the state where the paper sheet reaches the SP1 between the light emitting unit 3 and the introducing optical path 51 and the paper sheet SP2 between the outgoing path 52 and the light receiving unit 4 at the same time, that is, in the state where the paper sheet is normally conveyed, the light guide The amount of incident light a incident on the body 5 is 100 * 0.25 = 25%. And
The amount of outgoing light a incident on the light receiving unit 4 is outgoing spectrum a1h, 25 * 0.80 * 0 · 25 = 5%, and outgoing spectrum a2 is 25 * 0.2 = 5%, for a total of 10 %.
3: In the state where the paper sheet has first reached SP1 between the light emitting unit 3 and the introduction optical path 51, that is, in the broken line state of FIG. 3, the light quantity of the incident light a to the light guide 5 is 100 * 0. .25 = 25%, and the amount of the outgoing light a incident on the light receiving unit 4 is the outgoing spectrum a1: 25 * 0.8 = 20%, the outgoing spectrum a2: 25 * 0.2 = 5%, and the total is 25%.
4: On the contrary, in a state where the paper sheet has first reached SP2 between the lead-out path 52 and the light receiving unit 4, that is, in a state where the paper sheet is skewed opposite to the one-dot chain line in FIG. The light amount of the light a is 100%, and the light amount of the outgoing light a incident on the light receiving unit 4 is the outgoing spectrum a1: 100 * 0.8 * 0.25 = 20%, the outgoing spectrum a2: 100 * 0. 20 = 20%, and the total is 40.
As described above, since the amount of light incident on the light receiving unit 4 varies depending on the state of conveyance of the paper sheet, the change in the light amount data input to the light receiving control unit (not shown) is changed to voltage, current, resistance value, or the like. By converting and transmitting to the transport device, the feeding of the transport device is controlled to correct the skew state of the paper sheet.

  Next, the detection signal and the delivery timing of the transport device will be described with reference to FIGS. In this example, the received light control unit (not shown) controls the input detection data with the detection electric signal value and the elapsed time, and turns the clutch on and off to correct the skew state of the paper sheet. It is also possible to combine with the device disclosed in Patent Document 1. In other words, the skew correction device for inserted paper sheets of the present invention can be combined with a device for correcting skew of paper sheets that has been disclosed. In this embodiment, when a part of the leading edge of the paper sheet passes, the skew of the paper sheet is confirmed and immediately corrected, and after the end of the paper sheet passes. Next, a description will be given of the detection signal and the feeding timing of the transport device when a method of detecting a time difference that occurs when a sheet is skewed and correcting the skew based on the time difference is described.

3 to 5 show the skew correction according to the former method described above (the method of checking the skew of the paper sheet when a part of the leading edge of the paper sheet passes and correcting the skew immediately). FIG. 3 is an explanatory diagram showing the state of the paper sheet M inserted into the transport apparatus 1, and the state of the paper sheet M is classified into the following three types.
ex1: Transported in a normal state. Accordingly, the paper sheet M reaches SP1 between the light emitting unit 3 and the introduction optical path 51 and SP2 between the lead-out path 52 and the light receiving unit 4 simultaneously. (Indicated by the solid line in the figure)

In the case of 2, ex2: It is in a state where the sheet arrives first at SP1 between the light emitting unit 3 and the introduction optical path 51 by slightly skewing. (Indicated by broken lines in the figure.)

In the case of 3, ex3: It is a state in which the sheet arrives first at SP2 between the lead-out path 52 and the light receiving unit 4 with a large skew. (Indicated by a one-dot chain line in the figure)

Case 4

  Next, the timing for correcting the skew of the paper sheets inserted in the transport device 1 in each state will be described with reference to FIG. As shown in FIG. 1A, when the paper sheet M is inserted into the inside of the carrying device 1 from the carry-in port (not shown), its presence is confirmed by the detection sensor 14, and the motor Mo is driven from the stopped state. Rotate forward. At this time, the paper sheet M is transported by the transport belts 11 and 12 in any state ex1 to ex3.

  FIG. 4B shows a clutch CL (for controlling the driving of the conveyor belt 11) and a clutch CR (for driving the conveyor belt 12) for controlling the driving of the conveyor belts 11 and 12 of the conveyor device 1 in order to correct the skew state. FIG. 4C shows the amount of light received when the emitted light a is received by the light receiving unit 4 and the driving timing of the transport device 1. is there. In this embodiment, the motor Mo is always rotating in the forward direction, and the conveyor belts 11 and 12 are set to stop when the clutch is turned off. The conveyance belt may be stopped.

Hereinafter, the states ex1 to ex3 will be sequentially described.
ex1: Transported in a normal state. Accordingly, the sheet M reaches the SP1 between the light emitting unit 3 and the introduction light path 51 and the SP2 between the lead-out path 52 and the light receiving unit 4 at the same time, and the amount of light received by the light receiving unit 4 is located in the zone 3, so that the clutch Neither CL nor the clutch CR is operated, and the sheet is conveyed without stopping the conveying belt 11 and the conveying belt 12. (Indicated by the solid line in the figure.)

  ex2: (Slightly skewed, the state where the light emitting unit 3 side precedes. The broken line in the figure) First, the state where the paper sheet first reaches SP1 between the light emitting unit 3 and the introduction optical path 51 is detected first. . The amount of light received at this time corresponds to zone 2. (Actually, the detected amount of received light has a width of ± 5) When the zone 2 is reached, the clutch CL is turned off, and the conveyor belt 11 stops for a predetermined time t1. That is, the clutch CR does not operate, and only the conveying belt 12 is driven for a certain time t1, and the SP 2 side is conveyed between the lead-out path 52 of the paper sheet M and the light receiving unit 4, and the skew of the paper sheet M is corrected. . Then, when the paper sheet M finally reaches the zone 3 of the received light amount 10% detected when it reaches SP1 between the light emitting unit 3 and the introduction optical path 51 and SP2 between the lead-out path 52 and the light receiving unit 4, The conveyor belts 11 and 12 are driven to convey the paper sheet M in a normal state. The skew of the paper sheet M is corrected by these series of operations.

  ex3: The state in which the paper sheet first reaches only SP2 between the lead-out path 52 and the light receiving unit 4 in the state of being largely skewed and being in the state in which the light receiving unit 3 is in front is first. Detected. The amount of light received at this time corresponds to zone 1. (Actually, the detected amount of received light has a width of ± 5.) When this zone Z1 is reached, the clutch CR is turned off, and the conveyor belt 12 stops for a fixed time t2. The stop time is longer as the skew state of the paper sheet is larger. That is, the clutch CL does not operate, and only the transport belt 11 is driven for a certain time t2, transports the SP1 side between the light emitting unit 3 of the paper sheet M and the introduction optical path 51, and corrects the skew of the paper sheet M. . Then, when the paper sheet M finally reaches the zone 3 of the received light amount 10% detected when it reaches SP1 between the light emitting unit 3 and the introduction optical path 51 and SP2 between the lead-out path 52 and the light receiving unit 4, The conveyor belts 11 and 12 are simultaneously driven to convey the paper sheet M in a normal state. The skew of the paper sheet M is corrected by these series of operations.

  The above correction process will be described with reference to the flowchart of FIG. 5. When a paper sheet is inserted at the start and the insertion is confirmed by the detection sensor 14, the conveying device 1 is driven to introduce the paper sheet M into the light emitting unit 3. It is conveyed to SP2 between the optical path 51 and SP2 between the outlet path 52 and the light receiving unit 4. At this time, when the paper sheet M is simultaneously conveyed to the SP1 between the light emitting unit 3 and the introducing optical path 51 and to the SP2 between the outlet path 52 and the light receiving unit 4, it is recognized that the paper sheet is not skewed. Be transported. Here, when the passage of the sheet is first detected at SP1 between the light emitting unit 3 and the introduction optical path 51 and at SP2 between the lead-out path 52 and the light receiving unit 4, the SP1 precedes between the light emission unit 3 and the introduction optical path 51. Is turned off, the clutch CL is turned off, the conveyor belt 11 is stopped, and when the paper sheet passes SP2 between the lead-out path 52 and the light receiving unit 4, the paper sheet is skewed. Recognizing that the line has been corrected, the clutch CL is turned on again to convey the paper sheet. Conversely, when the passage of paper sheets is detected first at SP2 between the lead-out path 52 and the light receiving unit 4, it is recognized that the SP2 side is skewed so that the SP2 side precedes between the lead-out path 52 and the light receiving unit 4. The clutch CR is turned off, the conveying belt 12 is stopped, and when the paper sheet passes SP1 between the light emitting unit 3 and the introduction optical path 51, it is recognized that the skew of the paper sheet has been corrected, and the clutch CR is again operated. Turn on to transport paper.

  Next, based on FIG. 6 to FIG. 8, the timing of a method of detecting a time difference that occurs when the skew state is confirmed after the end of the paper sheet passes and correcting the skew based on the time difference. Will be described.

  FIG. 7 shows skewing by the above-mentioned latter method (a method of detecting a time difference that occurs when a skewed portion passes after the end of a paper sheet passes and corrects skewing based on the time difference). The timing of correction is shown. As shown in FIG. 7A, when the paper sheet M is inserted into the inside of the transport apparatus 1 from the carry-in entrance (not shown), its presence is confirmed by the detection sensor 14. Then, the motor Mo is driven from the stopped state and rotated forward. At this time, the paper sheet M is transported by the transport belts 11 and 12 in any state ex1 to ex3.

As shown in FIG. 6, the state of the paper sheet M inserted into the transport device 1 is classified into the following three types. Hereinafter, the states ex1 to ex3 will be sequentially described.
ex1: Transported in a normal state. Accordingly, the paper sheet M reaches SP1 between the light emitting unit 3 and the introduction optical path 51 and SP2 between the lead-out path 52 and the light receiving unit 4 simultaneously. (Indicated by the solid line in the figure)

In the case of 2, ex2: It is in a state where the sheet arrives first at SP1 between the light emitting unit 3 and the introduction optical path 51 by slightly skewing. (Indicated by broken lines in the figure.)

In the case of 3, ex3: It is a state in which the sheet arrives first at SP2 between the lead-out path 52 and the light receiving unit 4 with a large skew. (Indicated by a one-dot chain line in the figure)

Case 4

  Next, the timing for correcting the skew of the paper sheets inserted into the transport device 1 in each state will be described with reference to FIG. As shown in FIG. 7A, when the paper sheet M is inserted into the inside of the transport apparatus 1 from the carry-in entrance (not shown), the presence of the paper is confirmed by the detection sensor 14, and the motor Mo is driven from the stopped state. And rotate it forward. At this time, the paper sheet M is transported by the transport belts 11 and 12 in any state ex1 to ex3.

  FIG. 7B shows a clutch CL (for controlling the driving of the conveyor belt 11) and a clutch CR (for driving the conveyor belt 12) for controlling the driving of the conveyor belts 11 and 12 of the conveyor device 1 in order to correct the skew state. FIG. 4C shows the amount of light received when the emitted light a is received by the light receiving unit 4 and the driving timing of the transport device 1. is there. In this embodiment, the motor Mo is always rotating in the positive direction, and the conveyor belts 11 and 12 are set to stop when the clutch is turned off. Conversely, the conveyor belt 11 is turned on when the clutch is turned on. , 12 may be stopped.

  ex2: (Slightly skewed, the state where the light emitting unit 3 is preceded. The broken line in the figure) First, the state where the paper sheet has first reached SP1 between the light emitting unit 3 and the introduction optical path 51 is detected first. . The amount of light received at this time corresponds to zone 2. (Actually, the detected amount of light received has a width of ± 5.) When this zone 2 is reached, the sheet M is placed between the lead-out path 52 on the light receiving element 4 side and the light receiving unit 4 at SP2. The time T1 required to reach the zone 3 where the amount of light received reaches 10% is detected. Then, when a certain time (arbitrary) has passed since the paper sheet has passed SP1 between the light emitting unit 3 and the introduction light path 51 and SP2 between the lead-out path 52 and the light receiving unit 4, the clutch CR is moved to the detection time T1 described above. The conveyor belt 11 is stopped for a certain time T1. That is, the clutch CL is not operated, and only the conveying belt 12 is driven for a predetermined time T1 to correct the skew of the paper sheet. When the time T1 elapses, the transport belt 11 is driven to transport the paper sheet M in a normal state. The skew of the paper sheet M is corrected by these series of operations.

    ex3: First, a state in which the sheet arrives first at SP2 between the lead-out path 52 and the light-receiving unit 4 in the state where the light-receiving unit 4 is preceded by a large skew is detected first. The The amount of light received at this time corresponds to zone 1. (Actually, the detected light receiving amount has a width of ± 5.) When this zone 1 is reached, the sheet M is placed between the light emitting unit 3 on the light emitting unit 4 side and the introduction optical path 51 between SP140. And the time T2 required to reach the zone 3 where the received light amount is 10% is detected. Then, when a certain time (arbitrary) has passed since the paper sheet has passed SP1 between the light emitting unit 3 and the introduction optical path 51 and SP2 between the lead-out path 52 and the light receiving unit 4, the clutch CR is moved to the detection time T2 described above. The conveyor belt 12 is stopped for a predetermined time T1. That is, the clutch CL is not operated, and only the conveying belt 11 is driven for a predetermined time T1 to correct the skew of the paper sheet. When the time T2 has elapsed, the conveyor belt 12 is driven to convey the paper sheet M in a normal state. The skew of the paper sheet M is corrected by a series of these operations. In addition, since ex1: is the same as the above-described method, description thereof is omitted.

  The above correction process will be described with reference to the flowchart of FIG. 8. When a paper sheet is inserted at the start and the insertion is confirmed by the detection sensor 14, the conveyance device 1 is driven and the paper sheet M is introduced into the light emitting unit 3. It reaches SP1 between the optical paths 51 and SP2 between the lead-out path 52 and the light receiving unit 4. At this time, if the paper sheet is simultaneously conveyed to SP1 between the light emitting unit 3 and the introduction optical path 51 and SP2 between the lead-out path 52 and the light receiving unit 4, it is recognized that the paper sheet is not skewed and is conveyed as it is. Is done. Here, when the SP1 side between the light emitting unit 3 and the introducing optical path 51 first detects the passage of the paper sheet, it recognizes that the SP1 side is inclined so that the SP1 side precedes between the light emitting unit 3 and the introducing optical path 51, The clutch CL is turned off, the conveying belt 11 is stopped, and when the paper sheet passes SP2 between the lead-out path 52 and the light receiving unit 4, it is recognized that the skew of the paper sheet has been corrected, and the clutch CL again. Turn on to transport paper. Conversely, when SP2 between the lead-out path 52 and the light receiving unit 4 first detects the passage of the paper sheet, it recognizes that the SP2 side is skewed so that the SP2 side precedes between the lead-out path 52 and the light receiving unit 4, The clutch CR is turned off, the conveying belt 12 is stopped, and when the paper sheet passes SP1 between the light emitting unit 3 and the introduction optical path 51, it is recognized that the skew of the paper sheet has been corrected, and the clutch CR is again operated. Turn on and transport paper.

  FIG. 9 shows another embodiment of the light guide used in the detection device of the present invention. In addition, the same code | symbol is attached | subjected to the structure similar to Example 1, and description is abbreviate | omitted. The outgoing light a emitted from the light emitting unit 3 is transmitted into the relay light guide 53 by the reflecting surface 53a. Then, the outgoing light a is split into an outgoing spectrum a1 that is transmitted to the lead-out path 52 by the reflecting surface 53b at the end of the relay light guide path 53 and an outgoing spectrum a2 that is transmitted to the lower lower introduction path 54b of the detour light guide path 54. Is done. In this example, the emission spectrum a2 is transmitted through the detour light guide path 54 in the order of the lower introduction path 54b, the lower reflection surface 54c, the upper reflection surface 54d, and the reflection surface 54f formed to face the upper lead-out path 54a. , Which reaches the irradiation surface 43 to the light receiving control unit (not shown), the transmission path is shortened, the loss is reduced, and the transmission efficiency can be improved.

It is explanatory drawing which showed arrangement | positioning of the skew correction apparatus of the insertion paper sheet concerning the Example of this invention, (a) is a top view, (b) is AA sectional drawing of (a). is there. It is the perspective view which showed the detection apparatus of this invention. It is explanatory drawing which showed the conveyance state of the paper sheets which are 1st Example of this invention. FIG. 4 is a timing chart explaining the relationship between skew detection and skew correction in FIG. 3. FIG. 5 is a flowchart showing a skew detection and correction process of FIG. 4. It is explanatory drawing which showed the conveyance state of the paper sheets which are another Example of this invention. 7 is a timing chart for explaining the relationship between skew detection and skew correction in the conveyance state of FIG. 6. 8 is a flowchart illustrating a skew detection and correction process of FIG. 7. It is the perspective view which showed another structure of the light guide.

Explanation of symbols

M ... Paper sheet a ... Emission light a1 ... Emission spectrum a2 ... Emission spectrum 100 ... Skew correction apparatus 1 for inserted paper sheets ... Conveyance apparatus 11 ... Conveyance belt (left side)
12 ... Conveyor belt (right side)
DESCRIPTION OF SYMBOLS 13 ... Conveyance path 14 ... Detection sensor 2 ... Detection apparatus 3 ... Light emission part 31 ... Light emission surface 4 ... Light reception part 41 ... Light reception surface 42 ... Light reception surface 43 ... Irradiation surface 5 ... Light guide 51 ... Light emission introduction path 52 ... Derivation path 53 ... Relay light guide path 53a ... Reflective surface 53b ... Reflective surface 54 ... Detour light guide path 54a ... Upper light guide path 54b ... Lower introduction path 54c ... (Lower) Reflective surface 54d ... (Upper) Reflective surface 54e ... (Detour light guide path) Relay Light guide path 54f ... reflecting surface SP1 ... between light emitting part 3 and introduction light path 51 SP2 ... between lead path 52 and light receiving part 4

Claims (6)

A transport device having a transport path;
A light-emitting unit having a light-emitting element, a light-receiving unit having a light-receiving element, a relay light guide that relays the light emission introduction path and the lead-out path, the light emission introduction path and the lead-out path, and the relay light guide path and the light-receiving part directly A detection device having a light guide body that forms a bypassed light guide path that has been guided, and sandwiches the transport path between the light emitting section, the light emission introduction path of the light guide body, and the light receiving section and the lead path of the light guide body Are arranged opposite each other,
The amount of outgoing light that has passed through the leading end portion of the paper sheet that passes between the light emitting portion and the light emitting introduction path, and the outgoing light that has passed through the leading end portion of the paper sheet that passes between the lead-out path and the light receiving portion. A skew correction device for an inserted paper sheet, characterized in that a light amount obtained by combining a light amount and a light amount of outgoing light that has passed through the bypass light guide path and directly enters the light receiving unit is detected. In the skew correction apparatus of the insertion paper sheet according to claim 1,
The detection device includes a light amount transmitted through the leading end portion of the paper sheet that has passed between the light emitting unit and the light emission introducing path or between the light emitting path and the light receiving unit, and the light emitting unit for the emitted light. And a light amount directly transmitted between the light emission introduction path or between the lead-out path and the light receiving unit, and a combined light amount of the outgoing light that is transmitted through the bypass light guide path and directly enters the light receiving unit, A skew correction device for inserted paper sheets, characterized in that the skew direction of the paper sheets is determined. In the skew correction device for an inserted paper sheet according to any one of claims 1 to 2,
The detection device includes a light amount transmitted through the leading end portion of the paper sheet that has passed between the light emitting unit and the light emission introducing path or between the light emitting path and the light receiving unit, and the light emitting unit for the emitted light. Detecting the combined light amount of the light amount directly transmitted between the light emission introduction path or between the lead-out path and the light receiving portion and the light amount of the outgoing light that has passed through the bypass light guide path and directly entered the light receiving portion,
The skew direction and skew amount of the paper sheet depending on the time difference between the time when the combined light amount at the leading edge portion of the paper sheet passing earlier and the time when the combined light amount at the leading edge portion of the paper sheet passing later is detected. A skew correction device for inserted paper sheets, characterized in that In the skew correction device for an inserted paper sheet according to any one of claims 1 to 2,
The detection device controls driving of the transport device at the time of detecting the combined light amount of the emitted light that has passed through the leading end portion of the paper sheet that first passes between the light emitting unit and the light emission introduction path. A skew correction device for inserted paper sheets. In the skew correction device for an inserted paper sheet according to any one of claims 1 and 3,
The skew correction device for inserted paper sheets, wherein the detection device controls driving of the transport device based on a difference in detection time. In the skew correction device for an inserted paper sheet according to any one of claims 1 to 5,
The drive of the conveying device is controlled by stopping the conveying belt on the front end side of the paper sheet in which the first combined light amount is detected among the pair of left and right conveying belts provided in the conveying device. A skew correction device for inserted paper sheets.

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