JP2007062940A - Paper jam detection method, device and program of journal printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely detect paper jam of a journal printer for printing transaction records of ATM, CD and the like in a method, a device and a program for detecting paper jam of a journal printer. <P>SOLUTION: In this paper jam detection method of a journal printer, a movement quantity is added by one according to generation of driving signals of a pulse motor driving a mechanism taking up paper after printing to the paper and then held as a current movement quantity. Change of a rotation check sensor mounted to a rotary plate for monitoring rotation rotated in synchronization with a winding core of the paper and radially arranging transmitting parts and shielding parts alternately is detected. When the rotary check sensor is changed, a difference between a previous moving quantity and a current moving quantity is detected and stored. When the difference of the moving quantities are stored as much as a predetermined number, whether the value of respective differences exceeds a value set as a threshold of an abnormal change quantity is determined, and exceeding frequency is counted. Then, when the frequency of exceeding the threshold of the abnormal change quantity exceeds a preset abnormal frequency threshold, paper jam errors are output. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper jam detection method, apparatus, and program for a journal printer.

  Automatic transaction devices such as automatic teller machines (ATMs) and cash dispensers (cash dispensers: CDs) are equipped with journal printers for printing transaction records on roll-up paper (journals). Printed and saved as a record. Such a journal printer checks whether the winding core for winding the printed paper is rotating properly, but it may not be detected as an error even though it is not rotating properly, and an improvement is desired. Yes.

  FIG. 6 is an explanatory diagram of a conventional example. In the figure, 80 is a paper supply unit around which a long paper is wound, 81 is a paper for printing, 82 is a printing unit, 83 is a platen for moving the paper, and 84 is a winding for winding the printed paper. , 84 ′ is a winding core of the winding unit 84, 85 is a pulse motor (or step motor) that drives the winding core 84 ′ of the winding unit 84 via a driving belt (not shown), and 86 is transparent to light. The transmitting part (window part) that shields light and the shielding part that blocks light are arranged alternately in a radial manner with the core as the center, and in the same manner as the winding core 84 ′ of the winding part 84, the driving belt and gear are interlocked with the pulse motor 85. A rotating plate 86 ′ rotated by being driven by the sensor, a sensor for detecting a rotational position by arranging a light emitting element and a light receiving element so as to sandwich a transmitting part and a shielding part of the rotating plate 86, and 87 is a control device.

  In such a configuration, the journal printer prints transaction contents in a transaction device such as an ATM or a CD by the printing unit 82 while rotating one pulse motor 85 on the core 84 'of the platen 83 and the winding unit 84. Do. When the rotating plate 86 rotates in conjunction with the rotation of the winding core 84 ′ of the winding unit 84, the sensor 86 ′ repeats shielding / transmitting, but the detection output of the sensor 86 ′ (the output that is turned off by shielding and turned on by transmission). ) Is supplied to the control device 87. When this detection output is received, the pulse motor 85 is driven from the control device 87, and the number of phase advance steps is counted by the control device 87. The pulse motor 85 is driven by a fixed distance (angle) determined every time one line (one line) is printed.

  Conventionally, the controller 87 checks the normal rotation by monitoring the interval at which the rotating plate 86 is shielded and transmitted by the number of phase advance steps of the pulse motor 85.

  FIG. 7 is a diagram showing an operation example of the conventional example. Indicates the change in the number of phase advance steps for each sensor change, and the horizontal axis indicates the journal diameter (diameter of the paper wound around the winding portion 84) from small (minimum winding amount at the beginning of winding) to large (maximum winding amount). The vertical axis represents the number of phase advance steps of the pulse motor required until the rotation check sensor changes. A. As shown in FIG. 5, the winding portion of the journal is configured to rotate fast when the winding amount immediately after paper setting is small, and to rotate slowly because the diameter increases as the winding amount increases. Therefore, the number of phase advance steps of the pulse motor required until the rotation check sensor changes is shown in FIG. Gradually increase as shown. However, since the speed of the winding portion of the journal gradually changes, when the pulse motor 85 normally rotates and prints, the change of the adjacent rotation check sensor becomes an almost constant interval.

  The number of steps of the sensor and pulse motor in that case is shown in FIG. A. Indicates sensor change (on / off change), b. Represents the number of steps of the pulse motor from sensor on to next on. B. As shown in FIG. 4, conventionally, even if the pulse motor connected to the winding core rotates more than a certain step, it is judged normal if the rotation check sensor changes.

  C. of FIG. Indicates a conventional paper jam error detection operation that is detected when no sensor change occurs even when the number of on-on steps reaches a preset number of steps (paper jam detection step number). Is sensor change, b. Is the number of on-on steps.

As a technique for detecting a paper jam of a printer that prints on continuous paper, a drive signal supplied from the motor control means to the motor to rotate the motor that drives the recording paper transport mechanism at a predetermined speed, Compared with the rotation detection signal generated according to the rotation, and based on the comparison result, control is performed to stop the drive signal from the motor control means, and when a paper jam is likely to occur or when a paper jam occurs A technique (see Patent Document 1) that can immediately stop paper feeding is known.
JP-A-10-245140

  As described above with reference to FIG. 7, the conventional paper jam detection function does not generate a paper jam error detection output unless the pulse motor is completely locked and the rotation check sensor does not change.

  However, when the pulse motor is locked (rotation stops) when the optical axis of the sensor of the rotation check sensor is at the boundary between the transmission part and the shielding part of the rotating plate, the sensor blocks and transmits the light by the vibration of the motor drive. The operation of detecting alternately may be repeated. In such a case, there is a problem that an abnormality cannot be detected even though a paper jam has occurred.

  The technique of the above cited reference 1 detects a tendency that a paper jam is likely to occur, and does not detect a paper jam when it is at the boundary between the transmitting portion and the shielding portion of the rotating plate as described in FIG. Does not correspond.

  An object of the present invention is to provide a paper jam detection method, apparatus, and program for a journal printer that can reliably detect the occurrence of paper jam in a journal printer that prints transaction records such as ATM and CD.

  In the present invention, the number of phase advance steps of the pulse motor (from the start of shielding of the sensor to the start of the next shielding, or from the start of transmission to the start of the next transmission) is not equal due to the influence of unstable motor vibration caused by a paper jam. Using this feature, an error (paper jam) occurs when the amount of change in the number of the latest phase advancement steps (difference between each other) exceeds a certain value (threshold) and occurs more than once (above the threshold). Is detected.

  FIG. 1 shows the principle configuration of the present invention. In the figure, 1 is a control device, 1a is a movement amount adding means, 1b is a photo sensor that detects a transmitting portion and a shielding portion that are alternately provided radially on a rotating plate that rotates in synchronization with the winding core of a paper (journal). Rotation check sensor change determining means, 1c is a movement amount difference detection storage means, 1d is a movement amount update means, 1e is a printing processing means, 1f is an abnormality determination means of a movement amount difference, 1g is an abnormal number counting / determination means, 1h is a conventional paper jam checking means. 2 is a storage unit that is provided in the control device 1 and stores data such as 2a to 2d, 2a is a movement amount storage unit that stores the current movement amount, and 2b is a movement that stores a difference in movement amount for each of a plurality of changes. An amount difference storage unit, 2c is a previous movement amount storage unit, and 2d is an abnormal number storage unit.

  When a print end signal is input to the control device 1, the current amount of movement (corresponding to the amount of rotation of the motor) stored in the current amount-of-movement storage unit 2a is extracted by the amount-of-movement adding means 1a, and the original value is incremented by one. Is stored in the movement amount storage unit 2a, and the rotation check sensor change determination means 1b determines whether a change in the rotation check sensor has occurred. If a change is detected, the movement amount difference detection storage means 1c is driven to move the previous movement. The difference (absolute value) between the previous movement amount of the amount storage unit 2c and the movement amount storage unit 2a is detected, and the difference value is used as the number of times the difference at that time in the movement amount difference storage unit 2b is obtained (i. ) Is stored at the position (i-th) corresponding to. It is assumed that the number of times for obtaining the difference is set in advance. Next, the movement amount update unit 1d copies the current movement amount stored in the current movement amount storage unit 2a to the previous movement amount storage unit 2c and sets (resets) the content of the movement amount storage unit 2a to 0. .

  Thereafter, printing by the print processing means 1e is executed. At this time, a phase advance signal is generated for a pulse motor (not shown) to move the paper. Subsequently, the movement amount difference abnormality determination means 1f takes out the difference of the movement amount stored in the movement amount difference storage unit 2b, and its value is set to a preset change amount threshold value (a value larger than the normal change amount). ) Is exceeded. When the preset change amount threshold value is exceeded, the abnormal number count / determination means 1g takes out the count value of the abnormal number stored in the abnormal number storage unit 2d and adds (+1), It is determined whether or not the added abnormality number exceeds a preset abnormality number threshold value (the number of abnormality that should generate an alarm). If the abnormal number threshold is not exceeded, the added abnormal number is stored in the abnormal number storage unit 2d, and when the next print end signal is input, the operation returns to the movement amount adding means 1a. If the preset value is exceeded, an output (alarm) is generated as a paper jam error. When the rotation check sensor change determination means 1b determines that no change occurs, the conventional paper jam check means 1h operates and a state where no change in the normal rotation check sensor occurs occurs for a long time set in advance. By determining whether or not it continues, the occurrence of a paper jam error is output.

  The reason for the above condition that the difference in movement amount exceeds the change amount threshold value and the number of times of exceeding (abnormal number of times) exceeds a plurality of times (threshold value) is that the rotation / stop of the motor in the printing operation. The sensor change may fluctuate due to individual differences in the mechanism during repetition, and the speed change when the speed of the winding core suddenly increases due to the absence of the media load caused by the print head being applied when the paper runs out This is to prevent erroneous detection of abnormalities.

  According to the present invention, it is possible to solve the problem that the rotation check sensor does not detect a paper jam when the rotation check sensor is at the boundary between the transmission part and the shielding part of the rotating plate, and to reliably detect an error state of the journal printer.

  FIG. 2 is a hardware configuration diagram in which the present invention is implemented. In the figure, reference numeral 20 denotes a processor that performs processing in accordance with a program, and executes the functions 1a to 1h of the control device 1 of FIG. Reference numeral 21 denotes a RAM for storing various data such as movement amounts, previous movement amounts, and differences stored in the storage unit 2 of FIG. 1, 22 a ROM for storing programs and data, and 23 a rotation monitoring sensor (photo sensor). 24 is an input port, 24 is a host (a circuit that interfaces with a host control program such as an ATM device, etc.) 25 is an output port that generates a control signal to a pulse motor (described later), printing mechanism, etc. , 26 is a printing mechanism, a paper winding mechanism, and a motor (pulse motor or step motor) for driving a rotating plate, 27 is a printing mechanism, 28 is a paper winding mechanism, 29 is a rotating plate for monitoring rotation, and 30 is Rotation check sensor (photo sensor) 31 for detecting a change in the transmitting portion and the shielding portion arranged alternately and radially on the rotating plate, 31 is a driving belt for transmitting the rotation of the motor 26 32 When the paper winding diameter increases, a powder limiter rotational speed takes the load acts as a clutch to control so as to slow.

  The outline of the operation of FIG. 2 will be described. The printing operation is performed by driving the motor 26 and the printing mechanism 27 through the output port 25 under the control of the processor 20. Each time the processor 20 moves the motor 26 by one step, the processor 20 increments the movement amount (rotation amount) in the RAM 21 by one. When the motor 26 is operated by the printing operation, the paper take-up mechanism 28 takes up the printed paper through the powder limiter 32. There is a possibility that the rotation check sensor 30 detects a change in shielding / transmission by the rotation monitoring rotating plate 29 operating simultaneously with the operation of the paper take-up mechanism 28. The processor 20 reads the state of the rotation check sensor 30 from the input port 23 and detects a sensor change, thereby monitoring that the winding core is rotating.

  FIG. 3 is a sectional view of a journal printer mechanism in which the present invention is implemented. In the figure, a motor 26, a rotation monitoring rotary plate 29, a rotation check sensor 30, and a powder limiter 32 are the same as those shown in FIG. 2, 33 is a winding core for winding paper, and 34 is a platen. (Pulley gear), 35 and 36 are gears, 37 is a tension roller, 38 is a driving belt for transmitting the rotation of the motor 26 to each part, 39 and 40 are pulleys, and 41 is a paper supply unit. The printing unit is not shown.

  The motor 26 drives a driving belt 38 by a pulley, and thereby, a tension roller 37, pulleys 39 and 40, a platen 34, gears 35 and 36, a gear for the rotation plate 29 for rotation monitoring and a gear for the winding core 33 are provided. By driving, the winding of the sheet to the winding core 33 and the rotation position by the rotation check sensor 30 are detected.

  FIG. 4 is a processing flow of the embodiment, which is executed in the processor (computer) 20 of FIG. First, in the printing process, it is determined whether printing has been completed (S1 in FIG. 4). When the printing is completed, the printing ends normally. When the printing is not completed, the movement amount (rotation amount) is incremented by 1 (S2). This movement amount corresponds to the value of the current movement amount stored in the movement amount storage unit 2a of FIG. Next, it is determined whether or not there is a change in the rotation check sensor (S3 in FIG. 4). If it is determined that there is a change, the absolute value of the difference between the previous movement amount and the movement amount (current) is stored in a table (S4). . The previous movement amount corresponds to the value stored in the previous movement amount storage unit 2c in FIG. 1, and the current movement amount is the value obtained in step S2, and the absolute value of the difference between the two movement amounts is expressed as The table to be stored corresponds to the movement amount difference storage unit 2b shown in FIG. 1, and is stored in one position (a position corresponding to the number of times i obtained the absolute value of the movement amount difference). For example, the number of times of obtaining the absolute value of the difference can be “16”.

  Subsequently, the current movement amount is copied to the previous movement amount storage unit, and the current movement amount is set to “0” in the storage unit (S5 in FIG. 4). When it is determined in step S3 that there is no change in the rotation check sensor, a conventional error check (check whether the state remains unchanged in the on state or the off state continues) (S6 in FIG. 4), It is determined whether or not the check result is normal (S7), and if it is not normal, processing is performed as a paper jam error. If it is determined to be normal, the printing process is executed (S8 in FIG. 4), then the number of abnormalities is set to 0 (S9) and initialization is performed. The number of abnormalities corresponds to the value stored in the abnormal number storage unit 2d in FIG.

  Next, it is determined whether the check of the table (difference absolute value table) is completed (S10 in FIG. 4). If not completed, the i-th table (however, 16 data are stored in the absolute difference table). In this case, it is determined whether or not the value of 1 ≦ i ≦ 16 is greater than a preset change amount threshold value (set value for which the difference value is to be determined as abnormal) (S11). , The abnormality count is incremented by 1 (S12), and the process returns to S10. If the check has not been completed for all the tables, it is determined in step S11 whether the absolute value of the next difference in the table exceeds the change amount threshold value, and if it exceeds, the number of abnormalities is incremented by one. When the check of the table is completed, it is determined whether or not the number of abnormalities (value of the abnormal number storage unit 2d in FIG. 1) exceeds the number threshold (value set as an abnormal number value to be detected in advance as an abnormality) (FIG. 4). S13) When the abnormal frequency value exceeds the frequency threshold value, a paper jam error is processed (alarm is output). If the abnormal frequency value does not exceed the frequency threshold value, the process returns to step S1 and the same processing as described above is executed.

  FIG. 5 shows an operation example of paper jam detection according to the present invention. In the figure, a. Is the waveform of the rotation check sensor, b. Is the amount of movement (number of steps) during the period from turning on to turning on the rotation check sensor, c. Is the absolute value of the difference in the amount of movement between two adjacent points, d is the number of abnormalities, e. FIG. 6 is a graph showing a change in a difference between two points in a normal state and a paper jam (vibration state). In the example of FIG. 5, the amount of movement of the sensor from on to on is b. As shown in the figure, it changes as “17”, “5”, “2”, “13”, “9”, “16”, “5”,. C. As shown in FIG. 4, the data changes as “12”, “3”, “11”, “4”, “7”, “11”,.... It is assumed that the number (only a part thereof is shown in c.) Is stored (stored in the difference storage unit 2b in FIG. 1 and the RAM 21 in FIG. 2).

  From these 16 histories, it is determined whether or not the difference between the two points is abnormal. When the “change amount threshold” used at that time is set to “10”, it is determined that there is an abnormality. The number of times is shown in FIG. Shown in That is, when the difference between the two points is “12”, the number of abnormalities is “1”, when the difference between the third two points is “11”, the abnormal number is “2”, and the sixth two points When the difference between them is “11”, the number of abnormalities is “3”. Here, if the "frequency threshold" for the number of abnormalities is set to "2", the frequency threshold is exceeded when the number of abnormalities is "3", so a paper jam occurs and the product vibrates. It is judged that the error has occurred and an error is output. E. Of FIG. Is a graph of the difference between two points in the number of steps from on to on, the vertical axis represents the difference between the two points, and the horizontal axis represents the number of times the difference between the two points is obtained.

  (Appendix 1) In a paper jam detection method for a journal printer that prints on continuous paper and winds it around a core, in response to generation of a drive signal of a pulse motor that drives a mechanism that winds the paper following printing on the paper Rotation check attached to a rotating plate for rotation monitoring in which the moving amount is incremented by 1 and held as the moving amount of this time, rotates in synchronization with the winding core of the paper, and the transmission portion and the shielding portion are alternately arranged radially. When a change in the sensor is detected and a change occurs in the rotation check sensor, the difference between the previous movement amount and the current movement amount is detected and stored, and when a predetermined number of movement differences are stored, each difference is stored. It is determined whether the value exceeds the value set as the abnormal change threshold value, and the number of times that the abnormal change threshold value is exceeded is counted. Judgment whether or not exceeded Paper jam detection method of the journal printer and outputs the paper jam error.

  (Supplementary note 2) In Supplementary note 1, when the means for detecting the change of the rotation check sensor does not detect the change, the conventional paper jam check means for judging whether or not the state without the change continues for a preset time is driven. A method of detecting a paper jam in a journal printer.

  (Supplementary Note 3) In a paper jam detection device of a journal printer that prints on continuous paper and winds it around a winding core, in response to generation of a drive signal of a pulse motor that drives a mechanism that winds up the paper following printing on the paper A moving amount adding means that increments the moving amount by 1 and holds it as the moving amount this time, and a rotation monitoring rotating plate that rotates in synchronization with the winding core of the paper, and in which the transmitting portion and the shielding portion are alternately arranged radially. Means for detecting a change in the attached rotation check sensor; means for detecting and storing a difference between a previous movement amount and a current movement amount when a change occurs in the rotation check sensor; and When the number of stored values is stored, an error determination means for determining the number of times the difference value exceeds the value set as the threshold value of the abnormal change amount, and the number of times the difference is exceeded, Once the threshold is exceeded There is judged whether exceeds the number of malfunctions preset threshold, a paper jam detection device of the journal printer and outputs a paper jam error if exceeded.

  (Supplementary Note 4) The computer that controls the journal printer holds the current moving amount by adding 1 to the moving amount in response to the generation of the drive signal of the pulse motor that drives the paper winding mechanism following printing on the paper. And a means for determining a change of a rotation check sensor attached to a rotation monitoring rotation plate that rotates in synchronization with the winding core of the paper and is alternately arranged with a transmitting portion and a shielding portion. And a means for detecting the difference between the previous movement amount and the current movement amount by determining that there is a change in the rotation check sensor, and storing the difference in the storage unit, and storing a predetermined number of the movement amount differences. , A moving amount difference abnormality determining means for determining whether the difference value of each moving amount exceeds a value set as a threshold value of the abnormal change amount, and counting the number of times that the moving amount difference is determined to be abnormal, The count value is different from the preset value. Determines whether exceeds the number of thresholds, means for outputting a paper jam error if it exceeds, the journal printer paper jams detection program for functioning as a.

It is a figure which shows the principle structure of this invention. It is a hardware block diagram by which this invention is implemented. It is sectional drawing of the journal printer mechanism in which this invention is implemented. It is a figure which shows the processing flow of an Example. It is a figure which shows the operation example of paper jam (vibration) detection by this invention. It is explanatory drawing of a prior art example. It is a figure which shows the operation example of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control apparatus 1a Movement amount addition means 1b Rotation check sensor change determination means 1c Movement amount difference detection preservation | save means 1d Movement amount update means 1e Print processing means 1f Movement amount difference abnormality determination means 1g Abnormal frequency count / determination means 1h Conventional Paper jam check means 2 Storage unit 2a Movement amount storage unit 2b Movement amount difference storage unit 2c Previous movement amount storage unit 2d Abnormal frequency storage unit

Claims (3)

In a paper jam detection method for a journal printer that prints on continuous paper and winds it around the core,
In accordance with the generation of the drive signal of the pulse motor that drives the mechanism that winds up the paper following printing on the paper, the movement amount is incremented by 1 and held as the current movement amount,
Rotating synchronously with the winding core of the paper, detecting the change of the rotation check sensor attached to the rotation monitoring rotation plate in which the transmission part and the shielding part are alternately arranged radially,
When a change occurs in the rotation check sensor, the difference between the previous movement amount and the current movement amount is detected and stored.
When the difference in the movement amount is stored for a predetermined number, it is determined whether each difference value exceeds the value set as the threshold value of the abnormal change amount, and the number of times that the difference is exceeded is counted.
A method for detecting a paper jam in a journal printer, wherein it is determined whether or not the number of times the abnormal change amount threshold is exceeded exceeds a preset abnormality frequency threshold, and if it exceeds, a paper jam error is output. In a paper jam detection device of a journal printer that prints on continuous paper and winds it around the core,
A moving amount adding means for adding +1 to a moving amount in accordance with generation of a drive signal of a pulse motor that drives a mechanism for winding the paper following printing on the paper and holding it as a current moving amount;
Means for detecting a change of a rotation check sensor that rotates in synchronization with a winding core of the paper and is attached to a rotation monitoring rotation plate in which a transmission portion and a shielding portion are alternately arranged radially;
Means for detecting and storing the difference between the previous movement amount and the current movement amount when a change occurs in the rotation check sensor;
When a predetermined number of movement amount differences are stored, it is determined whether each difference value exceeds a value set as an abnormal change amount threshold, and the number of times the difference is exceeded is determined. Means,
It is determined whether or not the number of times the abnormal change amount threshold is exceeded exceeds a preset abnormal number threshold, and if it exceeds, an abnormal number counting / determination means for outputting a paper jam error,
A paper jam detection device for a journal printer, comprising: The computer that controls the journal printer
A moving amount adding means for adding +1 to a moving amount in accordance with generation of a drive signal of a pulse motor that drives a mechanism for winding the paper following printing on the paper and holding it as a current moving amount;
Means for determining a change of a rotation check sensor that rotates in synchronization with the winding core of the paper and is attached to a rotation monitoring rotation plate in which transmission portions and shielding portions are alternately arranged radially;
Means for detecting a difference between the previous movement amount and the current movement amount by determining that there is a change in the rotation check sensor and storing the difference in the storage unit;
When the movement amount difference is stored in the storage unit for a predetermined number, the movement amount difference abnormality determining means for determining whether the difference value of each movement amount exceeds a value set as a threshold value of the abnormal change amount. When,
Means for counting the number of times the movement amount difference is determined to be abnormal, determining whether the count value exceeds a preset abnormality frequency threshold, and outputting a paper jam error if exceeded
Jam detection program for journal printers to function as

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