JP4673047B2 - Paper sheet identification device - Google Patents

Description

  The present invention relates to a paper sheet identification device for identifying the authenticity of a paper sheet taken into a conveyance path.

  The paper sheet identification device is widely used in various labor-saving devices such as vending machines, automatic change machines, and game machine lending machines for gaming machines. A detection sensor for detecting insertion, a transport device for transporting a paper sheet inserted from the entrance along the transport path, an identification detection device provided adjacent to the transport path, and a detection sensor and an identification detection device. And a control circuit for controlling the motor of the conveying device. This identification detection device detects an optical sensor that detects an optical feature that forms a light / dark pattern or a transmitted light pattern of a paper sheet or a magnetic feature that forms a magnetic pattern by a component of ink printed on the paper sheet. It is composed of a magnetic sensor or the like.

  For example, in the paper sheet identification device disclosed in Japanese Patent Application Laid-Open No. 2003-187293, detection data based on a signal obtained by irradiating light on a paper sheet transported through a transport path and detecting the transmitted light by a light receiving element; A paper sheet identification device for identifying the paper sheet to be identified based on reference data obtained in the same way by conveying at least a reference paper sheet corresponding to the paper sheet to be identified to the conveyance path in advance. As a difference or ratio between the digital signal at a sampling timing that samples the output signal of the light receiving element at a predetermined time interval, converts the sampled signal into a digital signal, and the detection data and the reference data. Detection means to be obtained; a data storage circuit for storing the detection data and reference data obtained by the detection means in time series; and reference data; It compares the serial detection data is provided with identification means for identification of the specific identification target paper sheets.

  The identification inspection unit in this application is provided at the center in the width direction of the conveyance path, and irradiates the paper sheets conveyed through the paper sheet conveyance path with a spot light, for example, a light source such as an LED and the light source. For example, a light receiving element such as a photodiode is provided at a position for receiving light reflected from the paper sheet. It is also possible to use transmitted light instead of reflected light.

  However, in the above-described conventional technology, an identification inspection unit is provided at the center in the width direction of the conveyance path because it is necessary to cope with a change in the insertion direction of the paper sheet. Therefore, in order to improve the identification accuracy, when measuring reflected light or transmitted light at a plurality of locations in the width direction with respect to the transport direction of paper sheets, light emitting elements and light receiving elements corresponding to the number of measurement positions are used. Was necessary. For this reason, the space | interval of the width direction of a conveyance belt becomes large on attachment space, and conveyance of the narrow paper sheet | seat was actually difficult in some cases.

Prior art documents related to the invention of this application include the following.
JP 2003-187293 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. A detection device having
The light emitting part and the light emission introduction path of the light guide and the light receiving part and the light guide of the light guide are respectively arranged opposite to each other across the transport path,
The amount of outgoing light transmitted through the paper sheet passing between the light emitting unit and the light emission introducing path, the amount of outgoing light transmitted through the paper sheet passing between the lead-out path and the light receiving unit, and the bypass light guide path The amount of light combined with the amount of outgoing light that has passed through and directly incident on the light receiving unit is set and stored in advance as reference data, and the photometric data of the inserted paper sheet is compared with the reference data to identify the paper sheet By performing the above, a paper sheet identification device that can improve the identification accuracy with a simple detection device is provided.

  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. And the light receiving section and the light guide leading path are arranged opposite to each other across the transport path, and the amount of emitted light transmitted through the paper sheet passing between the light emitting section and the light emission introducing path. And the amount of emitted light transmitted through the paper sheet passing between the lead-out path and the light receiving unit and the amount of emitted light transmitted through the bypass light guide and directly incident on the light receiving unit as reference data Preset and store photometric data of the inserted paper sheet and the reference data Compared to those that were carried out the identification of the paper sheet.

  As described above, after the light emitted from one light emitting part is transmitted through the paper sheet at one place between the light emitting part and the light emission introduction path, it is split into two emitted lights, and one of them is Light is transmitted through the paper at one point between the other lead-out path and the light-receiving unit, and is directly incident on the light-receiving unit via the other detour light-guide path to form output light with three different transmittances. Then, by combining the outgoing lights having three different transmittances and creating a transmittance pattern as reference data, at least one of the outgoing lights passing through two places of the inserted paper sheet is transmitted. When the rate is different from the genuine note data, the composite transmittance pattern is displayed differently from the transmittance pattern of the reference data, so that the authenticity of the paper sheet is easily determined.

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. Detecting and comparing the reference data of the leading end portion of the paper sheet and the synthesized light amount measured photometrically to determine the skew direction of the paper sheet,
When the leading edge of the paper sheet first passes between the light emitting part and the light emission introducing path of the emitted light or between the lead-out path and the light receiving part, the conveying device is controlled to tilt the paper sheet. This is a modified line.

  As a result, even when a paper sheet is skewed and inserted into the transport device, the skew is detected by the amount of light transmitted through the leading edge of the paper sheet, and the skew is corrected and skewed. Is not conveyed to the detection device, and is accurately identified by the detection device.

  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 light quantity is detected, among the pair of left and right conveying belts provided in the conveying device. It is a thing.

  Thus, since the skew of the paper sheet and its direction are corrected before the pattern portion of the paper sheet passes through the detection device, the authenticity of the paper sheet can be detected more accurately.

The next invention is the amount of emitted light transmitted through the paper sheet passing between the light emitting section and the light emission introduction path,
As a reference data, the combined light amount of the emitted light that has passed through the paper sheet passing between the lead-out path and the light receiving unit and the light amount of the emitted light that has passed through the bypass light guide and directly entered the light receiving unit is used as reference data. When the photometric data of the inserted paper sheet deviates from the range of the reference data, the conveyance path is reversely operated and the inserted paper sheet is returned.

  As a result, even if paper sheets are stacked and inserted with a large skew, they are detected as poor insertion at the leading edge of the paper sheet and immediately returned in the direction of the insertion slot. , There is no possibility that the detection device will be mistakenly identified.

  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 The light emission introduction path and the light receiving section and the light guide lead-out path are arranged opposite to each other across the transport path, and the amount of emitted light transmitted through the paper sheet passing between the light emission section and the light emission introduction path, The amount of the emitted light transmitted through the paper sheet passing between the lead-out path and the light receiving unit and the amount of the emitted light transmitted through the bypass light guide and directly incident on the light receiving unit are combined as reference data in advance. Set and memorize and compare the photometric data of the inserted paper sheet with the reference data By performing identification of the kind, it is possible to identify the authenticity of accurately paper sheet with a simple structure.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1A and 1B are explanatory views showing a paper sheet identification apparatus according to an embodiment of the present invention, in which FIG. 1A is a top view and FIG. 1B is a cross-sectional view taken along line AA of FIG. FIG. 2 is a perspective view showing a detection device according to the present invention. FIG. 3 is a graph showing an example of identification data of the present invention. FIG. 4 is an explanatory diagram showing a state of skew correction in the present invention. FIG. 5 is a timing chart explaining the relationship between skew detection and skew correction in the transport state. 7 is a flowchart showing a skew detection and correction process of FIG. 6. FIG. 7 is a perspective view showing another configuration of the light guide.

  A paper sheet identification apparatus 100 according to the present invention includes a transport apparatus 1 and an identification apparatus 2 that identifies a 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 identification device 2 includes a light emitting unit 3 (infrared transmitted light) having a light emitting element (not shown) on the upper side of the conveyance path 13 and a light receiving unit 4 having a light receiving element (not shown). And a light guide that guides transmission of the emitted light a emitted from the light emitting unit 3 to the light receiving unit 4 on the lower side of the conveyance path 13, that is, on the side opposite to the light emitting unit 3 and the light receiving unit 4. A light body 5 is provided.

  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) (infrared transmitted light, hereinafter simply referred to as light emitted and emitted light refers to infrared transmitted light) is emitted from the light emitting surface 31 toward the light guide 5. Note that the shape of the light emitting surface 31 is not limited to a rectangular shape, and may be a hemispherical shape, an elliptical shape, or the like as long as it can be emitted uniformly to the light guide 5. The same applies to the light receiving surface of the light receiving unit 4 and the shape of 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, outgoing light a (outgoing spectrum a1 + outgoing spectrum 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 used as a light receiving element (not shown). An irradiation surface 43 to be irradiated is formed. Further, the light receiving surface 41 receives the emission spectrum a1 of the emitted light a from the light emitting unit 3 via the lead-out path and the light receiving unit, and the light receiving surface 42 outputs the emission spectrum a2 of the emitted light a from the light emitting unit 3. Is directly received through a bypass light guide 54 formed integrally with the light guide 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 concave main body portion (light emission introduction path 51, lead-out path 52, relay light guide path 53) and a detour light guide path 54. And this main-body part (The light emission introduction path 51, the derivation | leading-out path 52, the relay light guide path 53) is the light emission introduction path 51 formed facing the above-mentioned light emission part 3 on both sides of the conveyance path 13, and the light-receiving part 4. A lead-out path 52 formed oppositely, and a light-emission introduction path 51 and a relay light guide path 53 that connects and relays the lower part of the lead-out path 52 are formed. Further, the bypass light guide path 54 is branched from the lead-out path 52 side of the relay light guide path 53 and has an inverted U shape that reaches the light receiving surface 42 formed in the light receiving unit 4. These are integrally formed of synthetic resin or glass. Opposite reflective 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 at the connection portion between the relay light guide path 53 and the lead-out path 52. Hereinafter, SP1 is defined between the light emitting unit 3 and the light emission introduction 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 portion between the upper lead-out path 54a and the relay light guide path 54e and the connection portion 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 in which there is no paper sheet SP1 between the light emitting unit 3 and the light emission introducing 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 light emission introducing 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. Is transmitted through. The transmitted outgoing light a is transmitted into the relay light guide 53 by the reflecting surface 53a. Then, the outgoing light a is reflected by the reflecting surface 53 b of the relay light guide path 53 to the outgoing spectrum a 1 which is reflected and transmitted to the outlet path 52 and the outgoing spectrum a 2 which is transmitted to the lower introduction path 54 b of the detour light guide path 54. Is done. 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 the light loss and the paper sheet are not transmitted, the light amount is the same as the emitted light a emitted from the light emitting unit 3.

  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. The authenticity of the paper sheet can be determined by comparing these light quantities with the reference data.

Hereinafter, the means for detecting the authenticity of the paper sheet will be specifically described under the following conditions.
1: Infrared rays are used as outgoing light. So-called infrared transmitted light is used.
2: The amount of light a emitted from the light emitting unit 3 is 100.
3: It is specific to the paper sheet and varies depending on the position of the pattern, but the transmittance of the tip (generally plain) is 25%.
4: Outgoing spectral distribution to outgoing spectrum a2 is 20%. And
1: Naturally, the light quantity of the incident light a to the light guide 5 is as follows in the state where the sheet does not reach SP1 between the light emitting part 3 and the light emission introducing path 51 and SP2 between the lead-out path 52 and the light receiving part 4. The amount of light emitted to the light receiving unit 4 at 100% of the emitted light is also 100% (a total of 80% for the outgoing spectrum a1 and 20% for the outgoing spectrum a2).
2: In the state in which the paper sheet reaches SP1 between the light emitting unit 3 and the light emission introducing path 51 and SP2 between the lead-out 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 image is drawn on the paper sheet. Although it differs depending on the pattern, the transmittance at the tip portion is 25%, so that the light quantity of the incident light a to the light guide 5 is 100 * 0.25 = 25%. The amount of the outgoing light a incident on the light receiving unit 4 is 25 * 0.80 * 0 · 25 = 5% for the outgoing spectrum a1 and 25 * 0.2 = 5% for the outgoing spectrum a2, and is synthesized. The total light amount is 10%.
As described above, the amount of light detected by the light receiving unit 4 is substantially related to two data points SP1 between the light emitting unit 3 and the light emission introduction path 51 and SP2 between the lead-out path 52 and the light receiving unit 4. . Accordingly, if at least one of them is different from the real one, the amount of received light naturally changes. As described above, since the amount of light incident on the light receiving unit 4 varies depending on the state of the pattern drawn on the paper sheet as the paper sheet is conveyed, this tendency is stored as reference data and inserted. The authenticity can be determined by comparing with the measured data. Then, the above-mentioned photometric data is input to a light reception control unit (not shown) to convert the change in the light quantity data into voltage, current, resistance value, etc., and when it is out of range compared with the reference data, The reverse conveyance is controlled to reversely feed the paper sheets.

  FIG. 3 is a graph showing an example of identification data according to the present invention, in which the vertical axis represents the output voltage and the horizontal axis represents the change in transmittance in the paper sheet when time is taken. Here, the output voltage is a numerical value obtained by converting the amount of light received by the light receiving unit 4 using a known light amount-voltage conversion device. The time is a numerical value obtained by replacing the rotation of the disk measured at a fixed point with time. The lower limit L and upper limit U of a certain paper sheet are set as a normal distribution map of the actual measured value of sampling N = 1000, and the lower limit of the measured value excluding those outside of a certain range is set to the lower limit L and the upper limit is set to the upper limit. Limit U. Of course, if the reference data is created in the same way for the various paper sheets, the authenticity of those paper sheets can be detected.

  In the figure, the range 1-1 is a state in which the paper sheet M inserted into the transport device 1 has not yet reached the light emitting unit 3, and the amount of light is the output light amount = the amount of received light, and the voltage is the highest at this time. Highly detected. In the range of 2-2, a high voltage was detected according to the amount of received light in the plain portion at the tip of the paper sheet M. The range of 3-3 is the range of the pattern portion of the paper sheet M, and the detected value varies depending on the measurement point. This time trajectory is patterned, and this pattern is the basis of the reference data.

4 and 5 show the timing of skew correction by a method of confirming the skew of the paper sheet when a part of the leading edge of the paper sheet passes and immediately correcting the skew. FIG. 5 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. At this time, the description will be made assuming that the transmittance of the plain end portion of the paper sheet M is 25%.
ex1: Transported in a normal state. Accordingly, the paper sheet M simultaneously reaches SP1 between the light emitting unit 3 and the light emission introduction path 51 and SP2 between the lead-out path 52 and the light receiving unit 4. (Indicated by the solid line in the figure.)
ex2: A state in which the sheet arrives first at SP1 between the light emitting unit 3 and the light emission introduction path 51 by slightly skewing. (Indicated by broken lines in the figure.)
ex3: This is a state in which the sheet has been largely skewed and the paper sheet has reached SP2 between the lead-out path 52 and the light receiving unit 4 first. (Displayed with a dashed line in the figure.)

  Next, the timing for correcting the inclination of the paper sheets inserted into the transport device 1 in each state will be described with reference to FIG. As shown in FIG. 5A, when the paper sheet M is inserted into the inside of the carrying device 1 from the carry-in port (not shown), the presence is detected 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. 5B shows a clutch CL (for controlling the driving of the conveyor belt 11) for controlling the driving of the conveyor belts 11 and 12 of the conveyor device 1 and a clutch CR (for driving the conveyor belt 12) in order to correct the skew state. FIG. 6C 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, since the paper sheet M reaches SP1 between the light emitting unit 3 and the light emission introducing path 51 and 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, Neither the clutch CL nor the clutch CR is operated, and the sheet is conveyed without stopping the conveyance belt 11 and the conveyance belt 12. (Indicated by the solid line in the figure.)

  ex2: (Slightly skewed, the light emitting unit 3 side is ahead. The broken line in the figure) First, the state in which the sheet arrives first at SP1 between the light emitting unit 3 and the light emission introduction path 51 is detected first. The 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 this zone 2 is reached, the clutch CL is activated and the conveyor belt 11 stops for a fixed 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 having a received light amount of 10% detected when it reaches SP1 between the light emitting section 3 and the light emission introducing path 51 and SP2 between the outlet path 52 and the light receiving section 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: First, 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 where the light-receiving unit 3 is preceded by a large skew is detected first. Is done. The amount of light received at this time corresponds to zone 1. (Actually, the detected amount of light received has a width of ± 5) When the zone Z1 is reached, the clutch CR is activated and the conveyor belt 12 is stopped 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 is not operated, and only the conveying belt 11 is driven for a predetermined time t2, and the SP1 side is conveyed between the light emitting portion 3 and the light emission introducing path 51 of the paper sheet M, and the skew of the paper sheet M is corrected. To do. Then, when the paper sheet M finally reaches the zone 3 having a received light amount of 10% detected when it reaches SP1 between the light emitting section 3 and the light emission introducing path 51 and SP2 between the outlet path 52 and the light receiving section 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. 6. 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 emitted from the light emitting unit 3. It is conveyed to SP2 between the introduction path 51 and SP2 between the lead-out path 52 and the light receiving unit 4. At this time, when the paper sheet M is simultaneously transported to the SP1 between the light emitting unit 3 and the light emission introducing 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. It is conveyed as it is. Here, when the passage of the paper sheet is detected first at SP1 between the light emitting unit 3 and the light emission introducing path 51 and at SP2 between the lead-out path 52 and the light receiving unit 4, SP1 precedes between the light emitting part 3 and the light emission introducing path 51. The clutch CL is turned off, the conveyor belt 11 is stopped, and the paper sheet passes through SP2 between the lead-out path 52 and the light receiving unit 4, and then the paper sheet. And the crunch 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 light emission introduction path 51, it is recognized that the skew of the paper sheet has been corrected, and the clutch is again engaged. Turn on CR and transport paper sheets.

  FIG. 7 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 emitted to an outgoing spectrum a1 that is transmitted to the outlet path 52 by the reflecting surface 53b at the end of the relay light guide path 53 and to an outgoing spectrum a2 that is transmitted to the lower lower introduction path 54b of the detour light guide path 54. Spectroscopic. 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 the paper sheet identification device concerning the Example of this invention, (a) is a top view, (b) is AA sectional drawing of (a). It is the perspective view which showed the detection apparatus of this invention. It is the graph which showed an example of the identification data of this invention. It is explanatory drawing which showed the state of skew correction in this invention. FIG. 6 is a timing chart explaining the relationship between skew detection and skew correction in the transport state of FIG. 6, (a) shows the operation timing of the motor, and (b) corrects skew of the paper sheet. (C) shows the on / off timing of the clutch. It is the flowchart which showed the skew detection and correction process of this. It is the perspective view which showed another structure of the light guide.

Explanation of symbols

M ... paper sheet a ... outgoing light a1 ... outgoing light spectrum a2 ... outgoing light spectrum 100 ... paper sheet identification device 1 ... transport device 11 ... transport belt (left side)
12 ... Conveyor belt (right side)
DESCRIPTION OF SYMBOLS 13 ... Conveyance path 14 ... Detection sensor 2 ... Identification apparatus 3 ... Light emission part 31 ... Light emission surface 4 ... Light reception part 41 ... Light reception surface 42 ... Light reception surface 43 ... Irradiation surface 44 ... Reflection surface 5 ... Light guide 51 ... Light emission introduction path 52 ... Derivation path 53 ... Relay light guide path 53a ... Reflection surface 53b ... Reflection surface 54 ... Detour light guide path 54a ... Upper light guide path 54b ... Lower introduction path 54c ... (Lower) reflection surface 54d ... (Upper) reflection surface 54e ... (Detour) Light guide path) Relay light guide path 54f... Reflective surface SP1... Between the light emitting section 3 and the light emission introduction path 51. SP2... Between the outlet path 52 and the light receiving section 4. Detection light intensity (voltage conversion)
2-2 ... Detected light amount (voltage conversion) in a state in which the leading end portion of the paper sheet reaches the light receiving unit of the detecting device
3-3... Detection light amount (voltage conversion) in a state where the pattern portion of the paper sheet passes through the light receiving unit of the detection device
U ... Upper limit L ... Lower limit

Claims (4)

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 that forms a detoured light guide that is guided;
The light emitting part and the light emission introducing path of the light guide and the light receiving part and the light guide of the light guide are arranged opposite to each other across the transport path,
The amount of outgoing light transmitted through the paper sheet passing between the light emitting section and the light emission introducing path, the amount of outgoing light transmitted through the paper sheet passing between the outlet path and the light receiving section, and the bypass guide The amount of light transmitted through the optical path and directly combined with the amount of light emitted directly incident on the light receiving unit is set and stored in advance as reference data,
A paper sheet identification device characterized in that the photometric data of the inserted paper sheet is compared with the reference data to identify the paper sheet. In the paper sheet identification apparatus for paper sheets 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 lead-out path and the light receiving unit of the emitted light; and the light emitting unit of 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,
While comparing the reference data of the leading edge portion of the paper sheet and the combined photometric light amount to determine the skew direction of the paper sheet,
When the leading edge of the paper sheet first passes between the light emitting part and the light emission introducing path of the emitted light or between the lead-out path and the light receiving part, the conveying device is controlled to tilt the paper sheet. A paper sheet identification device characterized by correcting a line. In the paper sheet identification apparatus for paper sheets according to any one of claims 1 to 2,
The driving of the conveying device is controlled by stopping the conveying belt on the leading end side of the paper sheet in which the first light quantity is detected among the pair of left and right conveying belts provided in the conveying device. Paper sheet identification device. In the paper sheet identification apparatus for paper sheets according to claim 1,
The amount of emitted light transmitted through the paper sheet passing between the light emitting unit and the light emission introduction path;
The amount of emitted light that has passed through the paper sheet passing between the lead-out path and the light receiving unit;
Preliminarily set and store as a reference data the amount of light combined with the amount of outgoing light that has passed through the detour light guide and is directly incident on the light receiving unit,
A paper sheet identification apparatus, wherein when the photometric data of an inserted paper sheet deviates from the range of the reference data, the transport path is reversely operated and the inserted paper sheet is returned.

Images