JP2009119758A - Paper end detection method of printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a fanfold paper printer may cause a printing mechanism section to be damaged by blank printing when an operator intervenes in printing by removing printing paper while printing is in progress between the printing mechanism section and a paper end sensor. <P>SOLUTION: The conventional printer is made to carry out backward and forward paper feeds before starting a subsequent printing action when the end of printing paper passes the paper end sensor and stops just before the printing mechanism section. When a paper hole sensor detects paper feeding holes of the printing paper, the printer carries out a normal printing action and stops a printing action to judge that a paper end is detected when paper feeding holes of the printing paper cannot be detected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paper end detection method for a printing apparatus that uses continuous paper as printing paper.

A conventional paper end detection method for a continuous paper printing apparatus is configured such that when the end of the print paper passes through a paper end detection sensor installed upstream of the printing mechanism, a setting is made in advance and stored in a non-volatile storage element. The distance between the printing mechanism unit and the paper end detection sensor that has been set is read from the nonvolatile storage element, the remaining amount of paper that can be printed is set from the distance, and the remaining amount of paper that can be printed is calculated for each printing operation. When the distance became 0, it was determined that the paper end was detected, and the printing operation was stopped. (For example, see Patent Literature)
FIG. 3 is a schematic diagram showing the relationship between a conventional printing mechanism and a paper end detection sensor. Reference numeral 301 denotes a paper hole detection sensor that detects a print paper feed hole, 302 denotes a printing mechanism that executes printing, 303 denotes a paper end detection sensor that detects the end of the printing paper, 304 denotes printing paper, and 305 prints the printing paper. A paper feed hole 306 for installation in the apparatus is a printing paper terminal. The detection method of the printing paper end 306 of the printing device for continuous paper is as follows. When the printing paper 304 is reduced and the printing paper end 306 is in the state shown in FIG. The distance A between the printing mechanism unit 302 and the sheet end detection sensor 303 is read from the non-volatile storage element, the remaining amount of paper that can be printed is set from the distance, and the remaining amount of paper that can be printed is calculated for each printing operation from the distance. When the distance is 0, the printing paper end 306 has passed through the printing mechanism 302, so it is determined that the paper end detection state has been reached and the printing operation is stopped.
Japanese Patent No. 3659371

In the paper end detection method of the conventional printing apparatus described above, the print paper end 306 passes through the paper end detection sensor 303, printing is stopped by the operator before the print mechanism unit 302, and the print paper 304 is taken out. When an operation for resuming the printing operation is performed, the remaining amount of printable paper that is set when the paper end detection sensor 303 passes and is calculated for each printing operation is a value larger than 0. In some cases, the printing operation is started, the printing operation is executed in the absence of the printing paper 304, and the printing mechanism unit 302 is damaged by performing the blanking operation. For this reason, even when the printing paper 304 is taken out by the operator, it is necessary to determine the paper end detection state and stop the printing operation.

  SUMMARY OF THE INVENTION An object of the present invention is to prevent a blanking operation by determining a paper end detection state even when a printing paper is taken out by an operator.

  In order to achieve the above object, the present invention provides a printing mechanism unit that executes printing, a sheet transport unit, a printing control unit that controls the printing mechanism unit, and a sheet termination that detects a sheet termination upstream of the printing mechanism unit. A detection sensor, a paper hole detection sensor for detecting a paper feed hole on the downstream side of the printing mechanism, a means for setting a remaining amount of paper that can be printed when passing through the paper end detection sensor, and a paper that can be printed for each printing operation from the distance A method for detecting a paper end of a printing apparatus having a means for calculating a remaining amount, a non-volatile storage element, and a display device, wherein the printing operation is performed between the printing mechanism and the paper end detection sensor after passing through the paper end detection sensor. Is stopped, the paper feeding operation is executed before the next printing operation is started, and the presence or absence of printing paper is detected by the paper hole detection sensor.

  In addition, when the end of the printing paper passes the paper end detection sensor and stops before the printing mechanism, the reverse paper feed and forward paper feed are executed before starting the next printing operation. When the detection sensor detects a paper feed hole in the printing paper, a normal printing operation is executed, and when the printing paper feed hole cannot be detected, it is determined that the paper end is detected and the printing operation is stopped.

  According to the present invention, it is possible to determine the end-of-paper detection state even when the operator has taken out the printing paper, so that the printing operation can be stopped, and further, the printing mechanism by the idle driving operation Damage to the part can be prevented.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 1, 101 is a printing mechanism unit for executing printing, 102 is a paper end detection sensor for detecting the end of printing paper, 103 is a paper hole detection sensor for detecting a paper feed hole in printing paper, and 104 is a printing mechanism unit. A print control unit 105 for controlling, a paper presence / absence detecting unit 105 for detecting the presence / absence of a paper feed hole in the printing paper, and a paper 106 for calculating the distance between the end of the printing paper and the printing mechanism unit and setting the remaining amount of printable paper Remaining amount setting means, 107 is a remaining paper amount calculating means for calculating the remaining amount of paper that can be printed for each printing operation, 108 is a non-volatile storage element, 109 is a non-volatile storage of the distance between the printing mechanism and the paper end detection sensor A sheet remaining amount reading unit 110 that reads from the element is a display device.

  In FIG. 2, 201 is a paper end sensor detection determination for determining whether or not the printing paper has passed the paper end detection sensor, 202 is a printing operation determination for determining whether or not a printing operation is in progress, and 203 is a paper feed in the printing paper. A paper presence / absence detection process for detecting the presence / absence of a hole, 204 is a paper presence / absence determination for judging the presence / absence of a paper feed hole in the printing paper, and 205 is a paper end detection process for stopping the printing operation.

  In FIG. 3, 301 is a paper hole detection sensor that detects a paper feed hole in the printing paper, 302 is a printing mechanism unit that executes printing, 303 is a paper end detection sensor that detects the end of printing paper, 304 is printing paper, 305 Is a paper feed hole for installing the printing paper in the printing apparatus, and 306 is a printing paper terminal.

  In the case of normal printing, the paper presence / absence detection unit 105 of the print control unit 104 is executed during the printing operation, and the print paper end sensor detection judgment 201 indicates that the print paper end 306 has not passed the paper end detection sensor 102 (303). The process branches to “not detected”, the paper presence / absence detecting unit 105 is terminated, printing is performed by the printing mechanism unit 101, and paper is fed to the next printing position.

  When the printing operation is repeated and the printing paper end 306 passes the paper end detection sensor 102 (303), the printing mechanism unit 101 (302) and the paper end detection sensor are read from the non-volatile storage element 108 by the remaining amount reading means 109. 102 (303) is read out, the remaining amount of paper that can be printed is set by the remaining amount of paper setting means 106, and the remaining amount of paper that can be printed is calculated for each printing operation by the remaining amount of paper calculation means 107 from the distance. . If the distance is 0, it is determined that the paper end is detected, and the printing operation is stopped. If the distance is greater than 0, the printing operation is continued and the paper presence / absence detecting unit 105 is executed. Since the end of the printing paper 304 has passed through the paper end detection sensor 102 (303), the process branches to “being detected”, and the printing operation determination 202 branches to “printing” because the printing operation is being performed, and the presence of the sheet is detected. The means 105 is terminated, printing is performed by the printing mechanism unit 101, and paper is fed to the next printing position.

  When the printing paper end 306 passes the paper end detection sensor 102 (303) and the printing operation is stopped by the operator, when the printing operation is resumed by the operator, the paper presence / absence detecting means 105 is executed, and the paper is detected. In the end sensor detection judgment 201, the end of the printing paper 304 passes through the paper end detection sensor 102 (303), so the process branches to “being detected”. In the printing operation judgment 202, the printing operation is stopped. In the paper presence / absence detection processing 203, the backward paper feed is executed, the forward paper feed of the same distance is executed, the print paper 304 is returned to the original print position, and the paper hole is detected during the paper feed execution. The sensor 103 (301) detects “present” of the paper feed hole 305, and the paper presence / absence determination 204 detects that the print paper 304 is present. Terminated stage 105, and executes printing by the printing mechanism unit 101 performs the paper feed to the next printing position.

  When the printing paper end 306 passes the paper end detection sensor 102 (303) and the printing operation is stopped by the operator and the printing paper 304 is taken out, the paper presence / absence detection means is detected when the printing operation is resumed by the operator. 105, and the end of the printing paper 304 passes through the paper end detection sensor 102 (303) in the paper end sensor detection determination 201, so that the process branches to “detecting”, and the printing operation determination 202 stops the printing operation. Therefore, the process branches to “stopped”, and in the paper presence / absence detection processing 203, the backward paper feed is executed, the forward paper feed of the same distance is executed, and the paper hole detection sensor 103 (301) is executed during the paper feed. , “None” of the paper feed hole 305 is detected. In the paper presence / absence determination 204, it is detected that there is no print paper 304, so the flow branches to “None”. End the paper detecting means 105 executes the process of stopping the printing operation ends without executing printing mechanism unit 101 printing operation in.

  As described above, even when the operator takes out the printing paper 304, it can be determined that the paper end detection state has occurred.

The block diagram which shows embodiment of this invention The flowchart figure of the printing control part and paper presence / absence detecting means showing the embodiment of the present invention Schematic showing the relationship between the printing mechanism and the paper end detection sensor

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Print mechanism part 102 Paper end detection sensor 103 Paper hole detection sensor 104 Print control part 105 Paper presence detection means 106 Paper remaining amount setting means 107 Paper remaining amount calculation means 108 Non-volatile storage element 109 Paper remaining amount reading means 110 Display apparatus 201 Paper end sensor detection determination 202 Printing operation determination 203 Paper presence / absence detection processing 204 Paper presence / absence determination 205 Paper end detection processing 301 Paper hole detection sensor 302 Printing mechanism 303 Paper end detection sensor 304 Printing paper 305 Paper feed hole 306 Printing paper end

Claims (2)

  A printing mechanism unit that performs printing, a sheet transport unit, a printing control unit that controls the printing mechanism unit, a sheet end detection sensor that detects a sheet end on the upstream side of the printing mechanism unit, and a paper feed hole on the downstream side of the printing mechanism unit A paper hole detection sensor for detecting a paper, a means for setting a remaining amount of paper that can be printed when passing through a paper end detection sensor, a means for calculating the remaining amount of paper that can be printed for each printing operation from the distance, and a nonvolatile storage element And a paper end detection method for a printing apparatus having a display device. When a print operation is stopped between the print mechanism unit and the paper end detection sensor after passing through the paper end detection sensor, the next printing operation is started. A paper end detection method for a printing apparatus, wherein a paper feed operation is executed before and the presence or absence of printing paper is detected by a paper hole detection sensor. 2. The paper end detection method for a printing apparatus according to claim 1, wherein when the end of the printing paper passes through the paper end detection sensor and stops in front of the printing mechanism, the reverse paper is started before the next printing operation is started. If the paper hole detection sensor detects a paper feed hole in the print paper after performing feed and forward paper feed, the normal printing operation is executed, and if the print paper feed hole cannot be detected, the paper end A paper end detection method for a printing apparatus, characterized in that a printing operation is stopped by determining a detection state.

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