JP2006096486A - Paper sheet handling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet handling device capable of preventing the generation of shift miss when operating and stopping the device by measuring feeding speed or stop position per each module with a rotary encoder arranged per each of modules (per each of feeding mechanisms) and inputting the result of the measurement into a CPU for determination. <P>SOLUTION: This paper sheet handling device is formed by continuously arranging A feeding mechanism units 55a and B feeding mechanism units 55b, which are respectively provided with a separate rotary encoder. When stopping the paper sheet handling device, a sensor SC1 detects paper sheets, and an encoder pulse calculation circuit 68a calculates the number of encoder pulse Na. Similarly, when a sensor SC2 detects the paper sheets, an encoder pulse calculation circuit 68b calculates the number of encoder pulse Nb. These calculated number of encoder pulse Na and Nb are input to a feeding/sorting control unit 35, and in the case wherein these number exist within a range of the predetermined values, stop position of the paper sheet is determined right. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a paper sheet processing apparatus that significantly reduces abnormal conveyance of paper sheets such as mail.

  For example, a paper sheet processing apparatus (hereinafter referred to as an apparatus) that processes paper sheets such as mail is configured by combining a plurality of modules, and the conveyance control of paper sheets is controlled by a plurality of CPUs. The transport control is performed.

Further, a rotary encoder is arranged in one of a plurality of modules, the conveyance speed of the module is monitored, and the output signal is input to the CPU as the conveyance speed of the apparatus. And the conveyance mechanism was driven so that a paper sheet might be conveyed with the predetermined conveyance speed set based on control of this CPU (for example, refer patent document 1).
Japanese Patent Laying-Open No. 2003-311217 (page 4-5, FIG. 3)

  However, each module has a different load, so the paper sheet transport speed when the device starts and stops is different for each module, the accuracy of the paper sheet stop position is poor, and the paper sheet transport is restarted. There was a case of an abnormal shift mistake.

  In addition, since the conveyance speed is measured by one rotary encoder and the conveyance control is performed, the conveyance speed of each module varies depending on a load or the like, so that there is a problem that a shift error occurs when the apparatus is started or stopped.

  The present invention has been made in order to solve the above-described problem. A rotary encoder arranged for each module measures a conveyance speed or a stop position for each module, and inputs the measurement result to the CPU for determination. Accordingly, an object of the present invention is to provide a paper sheet processing apparatus that prevents a shift error at the start / stop of the apparatus.

  In order to achieve the above object, a paper sheet handling machine according to the present invention is in contact with a first transport roller having at least one pair of rollers for transporting paper sheets and the surface of the first transport roller. And a first conveyor belt that transmits the driving force of the first conveyor roller, and a first sensor that is disposed in the vicinity of the first conveyor roller and detects the paper sheet. Conveying means, a first rotary encoder that rotates as the first conveying belt rotates, a first encoder pulse counting means that counts encoder pulses output from the first rotary encoder, A second conveying roller that is disposed downstream of the first conveying means in the conveying direction and includes at least one pair of rollers configured similarly to the first conveying means to further convey the paper sheet; This second transport A second conveyor belt that contacts the surface of the roller and transmits the driving force of the second conveyor roller; and a second sensor that is disposed in the vicinity of the second conveyor roller and detects the paper sheets. And a second rotary encoder that rotates as the second transport roller rotates, and a second encoder pulse that counts encoder pulses output from the second rotary encoder The first encoder pulse count value counted by the first encoder pulse counting means after the paper sheet is detected by the counting means and the first sensor, and the paper sheet is detected by the second sensor. And then the first transfer means and the second transfer means are individually set based on the second encoder pulse count value counted by the second encoder pulse count means. Characterized by comprising a conveyance control means for controlling.

  According to the present invention, the rotary encoder arranged for each module measures the conveyance speed or stop position of each module (for each conveyance mechanism unit), and inputs the measurement result to the CPU to determine the start of the apparatus.・ It is possible to prevent shift errors when stopping.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a paper sheet processing apparatus 100 according to an embodiment of the present invention. 1A is a plan view, and FIG. 1B is a front view. The paper sheet processing apparatus 100 (hereinafter referred to as “apparatus”) picks up and feeds the paper sheets supplied in a batch one by one, and reads and recognizes the delivery classification information described on the paper sheets. A paper sheet supply / recognition unit 10 is provided. Further, a stacker stacking unit 50 is provided that sorts the paper sheets based on the delivery classification information recognized by the paper sheet supply / recognition unit 10.

  Note that image information indicating delivery classification information of a paper sheet that cannot be recognized by the paper sheet supply / recognition unit 10 is transmitted to a video coding system (hereinafter referred to as VCS), and the image is displayed. When delivery classification information is input by an operator based on the information, a bar code is printed by the IJP (Ink Jet Printer) during online processing and is accumulated in the stacker.

  The paper sheet supply / recognition unit 10 includes a supply unit 1, an extraction unit 2, an exclusion stack unit 3b, a pre-barcode reading unit 4, an OCR unit 5, an OCR delay unit 6a, a VCS delay unit 6b, an IJP (Ink Jet Printer). ) A printing unit 7, a verification fiber code reading unit 8, a branching unit 9, and an operating panel 20 are provided.

  In the apparatus 100, when sheets are set in the supply unit 1 and the apparatus is operated by turning on a start switch (not shown) of the operation panel 20, the sheets are extracted from the extraction unit 2.

  The taken-out paper sheets are detected by the mechanism detection unit 3a to detect a letter such as a foreign substance-mixed paper sheet or a non-standard-size paper sheet, and are excluded to the rejection stacking unit 3b. Various data written on the paper sheet are recognized by the prebar code reading unit 4 and the OCR unit 5 and flow to the OCR delay unit 6a.

  The OCR delay unit 6 a is a delay conveyance path for securing time for recognition by the OCR unit 5. Further, the VCS delay unit 6b sets the time for the VCS processing (processing for displaying an image of the paper sheet on the monitor and keying the delivery classification information within a predetermined time) for the paper sheets that could not be read by the OCR unit 5. It is a transport unit for making money.

  The IJP printing unit 7 converts the delivery classification information set based on the pre-bar code reading unit 4 and the OCR unit 5 or the VCS keying information into a special format barcode. Further, the printed content is rechecked by the verification fiber code reading unit 8. After that, the control unit performs final determination (determination of the final destination stacker), operates the gate (not shown) of the branching unit 9 to accumulate in the corresponding stacker based on the result of the final determination, and enters each stage. Do the distribution. The distributed paper sheets are conveyed to the stacker stacking unit 50, and are stacked on the corresponding stacker according to the determination of the final destination stacker.

  FIG. 2 is a block diagram relating to a control unit (control means) that controls the apparatus 100. The control unit 30 includes a take-out control unit 31 for controlling the periphery of the supply / take-out unit, a foreign matter detection control unit 32 for removing foreign matter-mixed paper sheets, and a reading unit for exchanging paper sheet delivery classification information. Interface control unit 33, print control unit 34 for printing the information by IJP, transport / sorting control unit 35 for transporting and stacking paper sheets to a predetermined stacker, and stacking information and apparatus for paper sheets The panel control unit 36 for displaying the abnormal information is controlled.

  The conveyance / sorting control unit 35 is integrated in a motor drive circuit 63 for conveying a sheet of paper, an encoder counting circuit 68 for detecting how fast the conveyance belt is driven, and each stacker. Gate drive circuit 42, a shift sensor for detecting the drive timing of the gate, a full detection sensor (two types) for monitoring the integrated state, and a switch control circuit for detecting an on / off button of the paper card issue switch 43 is controlled.

  Further, the conveyance / sorting control unit 35 displays a full lamp for informing the full state of the stacker, a lamp control circuit 44 for turning on / off a paper label lamp for instructing the start or removal of stacking, and for displaying stacking information. The LCD control circuit 45 is controlled. Various information necessary for the control is stored in the memory circuit 46.

  FIG. 3 is a configuration diagram of a part of the transport mechanism unit that transports the sheets of the apparatus 100, and is an example in which the A transport mechanism unit 55a and the B transport mechanism unit 55b are continuously arranged. In this apparatus, each of these mechanism units is incorporated as a module, and for example, a pre-barcode reading unit 4, an OCR unit 5, an IJP printing unit 7 and the like are incorporated. Here, based on the gist of the invention, description will be made focusing on the transport mechanism.

  Since the A transport mechanism unit 55a and the B transport mechanism unit 55b have the same configuration, the A transport mechanism unit 55a will be mainly described, and then different parts will be described.

  The A transport mechanism unit 55a is provided with a transport unit 56a (first transport unit) and a transport state monitoring unit 57a.

  The transport unit 56a transports the paper sheet Pa that receives power from the sensor SC1 (first sensor) that detects the paper sheet, a power source, a power transmission mechanism that transmits the power source, and the power transmission mechanism. And a transport mechanism.

  The power source includes a drive motor 64a and an inverter 63a that sets the rotational speed of the drive motor 64a.

  The power transmission mechanism for transmitting the power source includes a pulley 65a1 disposed on the rotation shaft of the drive motor 64a, a drive belt 66a connected to the pulley 65a1 to transmit the driving force, and the driving force of the drive belt 66a transported as described above. The pulley 65a2 is transmitted to the mechanism.

  The transport mechanism includes a transport roller 62a1 (first transport roller) that is rotated by the driving force received by the pulley 65a2, a transport belt (first transport belt) 61a that is connected to the transport roller 62a1 and transmits the drive force, and It is composed of a transport roller 62a2 (first transport roller) driven by the transport belt 61a.

  In addition, the conveyance state monitoring unit 57a is arranged on the rotation shaft of the conveyance roller 62a2 and measures a conveyance speed and a rotary encoder 67a (first rotary encoder), and an encoder that counts encoder pulses output from the rotary encoder 67a. The pulse counting circuit 68a (first encoder pulse counting means) is configured. The count value (first encoder pulse count value) counted by the encoder pulse counting circuit 68 a is output to the transport / partition control unit 35.

  The conveyance / sorting control unit 35 detects a conveyance state from an output signal of the encoder pulse counting circuit 78a and an output signal of an encoder pulse counting circuit 78b described later. Moreover, the frequency for starting the drive motor 64a is set to the inverter 63a.

  The B transport mechanism unit 55b is provided with a transport unit 56b (second transport unit) and a transport state monitoring unit 57b.

  The transport unit 56b receives a paper sheet Pb that receives the power from the sensor SC2 (second sensor) that detects the paper sheet, a power source, a power transmission mechanism that transmits the power source, and the power transmission mechanism. And a transport mechanism for transporting.

  Further, the conveyance state monitoring unit 57b is arranged on the rotation shaft of the conveyance roller 62b2, and a rotary encoder 67b (second rotary encoder) that measures the conveyance speed, and an encoder that counts encoder pulses output from the rotary encoder 67b. The pulse counting circuit 68b (second encoder pulse counting means) is configured. The count value (second encoder pulse count value) counted by the encoder pulse counting circuit 68 b is output to the transport / partition control unit 35.

  The conveyance / sorting control unit (conveyance control means) 35 detects the conveyance state from the output signal of the encoder pulse counting circuit 78b and the output signal of the encoder pulse counting circuit 78a. Moreover, the frequency for starting the drive motor 64b is set to the inverter 63b.

Next, the conveyance control operation by the conveyance / sorting control unit will be described with reference to FIGS.
FIG. 4 is a flowchart during the normal operation of the transport control. First, when paper sheets are detected by the shift sensor SC1 (Yes in S1), the encoder pulses output from the rotary encoder 67a are counted by the encoder counting circuit 68a (S2). If the paper sheet is not detected by the shift sensor SC1, the process waits until it is detected (No in S1).

After a predetermined time has elapsed, the counted encoder pulse number Na is read and it is determined whether or not it is within the allowable value K1 shown in the following equation (1) (S3). When it is within the allowable value (Yes in S3), the normal conveyance is set (S7). If it is not within the allowable value (No in S3), a conveyance abnormality is set (S8).
(Ns−Ka) ≦ Na ≦ Ns + Ka (1)
Ns: Standard encoder pulse number during normal operation Ka: Allowable value of encoder pulse number of A transport mechanism

  Similarly, when a sheet is detected by the shift sensor SC2 (Yes in S4), the encoder pulse Nb output from the rotary encoder 67b is counted by the encoder counting circuit 68b (SS5). When the paper sheet is not detected by the shift sensor SC2, the process waits until it is detected (No in S4).

After a predetermined time has elapsed, the counted encoder pulse number Nb is read and it is determined whether or not it is within the allowable value Kb shown in the following equation (2) (S6). When the value is within the allowable value, the normal conveyance is set. If it is not within the allowable value (No in S6), the conveyance abnormality is set (S8).
(Ns−Kb) ≦ Na ≦ Ns + Kb (2)
Ns: number of standard encoder pulses during normal operation Kb: allowable number of encoder pulses for the B transport mechanism

  The encoder pulse allowable value Ka of the A transport mechanism and the encoder pulse allowable value of the B transport mechanism differ depending on the structure of the transport mechanism and the load applied to the transport mechanism. For example, when the structures of the A transport mechanism unit and the B transport mechanism unit are different and the number of paper sheets held in these mechanism units is different, the encoder pulse allowable value Ka of the A transport mechanism unit and the B transport mechanism unit The encoder pulse allowable value Kb is a different value.

  The method for determining the number of encoder pulses for each transport mechanism unit and checking the transport state during normal operation as described above is not limited to this case, and the transport state of each transport mechanism unit at the time of activation is confirmed. The method can be similarly applied.

Next, the relationship between the conveyance speed and the encoder pulse will be described with reference to FIG. Here, a description will be given using the shift sensor SC1 of the A transport mechanism unit and the shift sensor SC2 of the B transport mechanism unit. The conveyance time T12 between the shift sensors SC1 and SC2 is calculated from the count values of the encoder pulse counting circuits 68a and 68b using the following equation (2).
T12 = Tck × N (2)
T12: Transport time (ms) between shift sensors SC1 and SC2
Tck: Encoder pulse period (ms) when paper sheets are conveyed
N: Encoder pulse count

  Here, the count value N of the encoder pulse will be described. The distance between the shift sensors SC1 and SC2 is constant, and the distance that the paper sheet is transported during one encoder pulse is the slip of the contact portion between the transport belt and the transport roller, or the contact portion between the transport belt and the paper sheet. If there is slippage, the encoder pulse count value N will not be constant. Therefore, the conveyance speed of the paper sheet can be grasped by measuring the number N of encoder pulses between the shift sensors SC1 and SC2. That is, when the count value of the encoder pulse at the standard transport speed is N, if the transport speed is slow for the above reason, the encoder pulse count value is small (the transport time is long) and the transport speed is fast. Indicates a large count value of the encoder pulse (conveyance time is shortened).

  Therefore, when the count value of the encoder pulse is less than a predetermined value, it can be determined that the conveyor belt is detached.

FIG. 5A is a timing chart when the paper sheet is transported in the standard transport time. The conveyance time T12s in this case is shown in the following formula (3).
T12s = Tsck × N (3)
T12s: Standard transport time (ms) between shift sensors SC1 and SC2.
Tsck: Encoder pulse period (ms) when a paper sheet is transported at the standard transport speed
N: Encoder pulse count

FIG. 5B is a timing chart when the paper sheet is transported at a transport speed that is slower than the standard transport speed. In this case, the conveyance time T12l is longer than the standard conveyance time T12s, and is expressed by the following equations (4) and (5). In the illustrated example, the encoder pulse number n becomes N−2 during time T12s in the case of standard conveyance, and the paper sheet does not reach the sensor SC2.
T12l = Tlck × N (4)
T12l> T12s (5)
T12l: Long transport time (ms) between the shift sensors SC1 and SC2.
Tlck: Encoder pulse period (ms) when paper sheets are transported slower than the standard transport speed
N: Encoder pulse count

FIG. 5C is a timing chart when the paper sheet is transported at a transport speed higher than the standard transport speed. In this case, the conveyance time T12h is shorter than the standard conveyance time T12s, and is expressed by the following equations (6) and (7). In the illustrated example, the encoder pulse number n is N + 2 at time T12s in the case of standard conveyance, and the encoder pulse number n is two larger than the standard value when the paper sheet reaches the sensor SC2.
T12h = Thck × N (6)
T12h <T12s (7)
T12h: Short conveyance time (ms) between shift sensors SC1 and SC2.
Thck: Encoder pulse period (ms) when paper sheets are transported faster than the standard transport speed
N: Encoder pulse count

  FIG. 6 is a flowchart when the conveyance control is stopped. First, when a paper sheet is detected by the shift sensor SC1 (Yes in S10), the encoder pulse number Na output from the rotary encoder 67a is counted by the encoder counting circuit 68a (S11). If the paper sheet is not detected by the shift sensor SC1, the process waits until it is detected (No in S10).

  Next, after the conveyance is stopped, the encoder pulse number Na counted by the encoder pulse counting circuit 68a is read (S12).

Next, it is determined whether or not the read encoder pulse number Na is within the allowable value Kas shown in the following equation (8) (S13). If it is within the allowable value, the normal conveyance is set (S18). If it is not within the allowable value (No in S13), the conveyance abnormality is set (S19).
(Nss-Kas) ≦ Na ≦ Nss + Kas (8)
Nss: Standard encoder pulse number at stop Kas: Allowable encoder pulse number at stop of A transport mechanism

  Similar to the shift sensor SC1, when the paper sheet is detected by the shift sensor SC2 (Yes in S14), the encoder pulse number Nb output from the rotary encoder 67b is counted by the encoder coefficient circuit 68b (S15). If the paper sheet is not detected by the shift sensor SC2, the process waits until it is detected (No in S14).

Next, it is determined whether or not the read encoder pulse number Nb is within the allowable value Kbs shown in the following equation (9) (S17). If it is within the allowable value, the normal conveyance is set (S18). If it is not within the allowable value (No in S17), the conveyance abnormality is set (S19).
(Nss−Kbs) ≦ Nb ≦ Nss + Kbs (9)
Nss: Standard encoder pulse number when stopped Kbs: Permissible value of encoder pulse number when B transport mechanism is stopped

  The encoder pulse number Na is an output of the rotary encoder 67a of the A transport mechanism unit 55a, and indicates a value following the transport of the A transport mechanism unit. Similarly, the encoder pulse number Nb is an output of the rotary encoder 67b of the B transport mechanism section 55b and indicates a value following the transport of the B transport mechanism section. Since the transport distance of the paper sheet for each encoder pulse is set for both the encoder pulse numbers Na and Nb, the paper sheet is counted by counting the encoder pulse numbers Na and Nb after the shift sensors SC1 and SC2 are detected. You can know the stop position of the kind.

The schematic block diagram of the paper sheet processing apparatus by the Example of this invention. The block diagram regarding the control part of a paper sheet processing apparatus. The block diagram of the conveyance mechanism part of a paper sheet processing apparatus. The flowchart at the time of the normal operation | movement of conveyance control. The timing chart explaining the relationship between a conveyance speed and an encoder pulse. The flowchart at the time of the stop of conveyance control.

Explanation of symbols

Pa, Pb Paper 1 Supply unit 2 Extraction unit 3 Exclusion stacking unit 4 Bar code reading unit 5 OCR unit 6a OCR delay unit 6b VCS delay unit 7 IJP printing unit 8 Verifiber code reading unit 9 Branching unit 10 Paper supply Recognizing unit 20 Operating panel 30 Control unit 35 Transport / sorting control unit 50 Stacker stacking unit 55a A transport mechanism unit 55b B transport mechanism unit 56a, 56b Transport unit 57a, 57b Transport state monitoring unit 62a1, 62a2, 62b1, 62b2 Transport roller 63a, 63b Inverters 64a, 64b Drive motors 67a, 67b Rotary encoders 68a, 68b Encoder pulse counting circuit 100 Paper sheet processing apparatus

Claims (4)

A first transport roller having at least one pair of rollers for transporting paper sheets, and a first transport for contacting the surface of the first transport roller and transmitting the driving force of the first transport roller A first conveying means comprising a belt and a first sensor disposed in the vicinity of the first conveying roller for detecting the paper sheet;
A first rotary encoder that rotates as the first conveyor belt rotates;
First encoder pulse counting means for counting encoder pulses output from the first rotary encoder;
A second transport roller that is disposed downstream of the first transport unit in the transport direction and includes at least one pair of rollers configured similarly to the first transport unit to further transport the paper sheet; A second conveying belt that contacts the surface of the second conveying roller and transmits the driving force of the second conveying roller; and is disposed in the vicinity of the second conveying roller to detect the paper sheets. A second transport means comprising a second sensor;
A second rotary encoder that rotates in accordance with the rotation of the second transport roller;
Second encoder pulse counting means for counting encoder pulses output from the second rotary encoder;
The first encoder pulse count value counted by the first encoder pulse counting unit after the paper sheet is detected by the first sensor and the paper sheet after the second sensor is detected by the first sensor. And a conveyance control means for individually controlling the first conveyance means and the second conveyance means based on the second encoder pulse count value counted by the second encoder pulse counting means. Paper sheet processing equipment. The transport control means includes
When the first encoder pulse number counted by the first encoder pulse counting means is not within a predetermined range during a predetermined time after the paper sheet is detected by the first sensor, or It is determined that a conveyance abnormality has occurred when the second encoder pulse number is not within a predetermined range during a predetermined time after the paper sheet is detected by the second sensor. Item 1. A paper sheet processing apparatus according to item 1. The transport control means further includes
The first encoder pulse counted by the first encoder pulse counting means until the paper sheet is detected by the first sensor and the paper sheet is detected by the second sensor. 2. The paper sheet processing apparatus according to claim 1, wherein when the count value is less than a predetermined value, it is determined that the first transport belt is detached. The transport control means further includes
When the paper sheet transport device is stopped, the paper sheet is detected from the first encoder pulse count value counted by the first encoder pulse counting means after the paper sheet is detected by the first sensor. The paper sheet is calculated from the second encoder pulse count value counted by the second encoder pulse counting means after the paper sheet is detected by the second sensor. 2. The paper sheet processing apparatus according to claim 1, wherein a position where the paper is stopped is calculated.

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