JP2006227375A - Electrophotographic apparatus for continuous paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrophotographic apparatus continuous paper capable of preventing printing slippage by performing an error display or stopping the operation of the apparatus when the stop position does not coincide with a prescribed position before the start of printing, and then, capable of preventing useless consumption of the paper due to the printing slippage and capable of reducing reprinting work. <P>SOLUTION: N (N is integer ≥2) pieces of transmission type optical sensors capable of detecting feed holes are arranged in a paper feeding direction at intervals of 1/(2×N) inch with reference to the feed holes perforated at intervals of 1/2 inch in both edges of the continuous paper in the width direction, and the position of the feed hole decided by the page leading position of the continuous paper and the constitution of the apparatus is detected by either of N-pieces of sensors. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a continuous paper electrophotographic apparatus.

  In continuous paper electrophotographic devices, continuous paper with feed holes every 1/2 inch in both edges in the width direction is driven in the driving direction while fitting the tractor pins arranged at regular intervals with the feed holes of the continuous paper. To the tractor drive unit. A toner image formed on the photosensitive drum is transferred onto the fed continuous paper.

  Here, the toner image transferred onto the continuous paper needs to be transferred to a designated position on the continuous paper. Therefore, the sheet loading position of the continuous sheet when the sheet conveyance is stopped is fixed, and the printing timing is determined by calculating the feed amount of the continuous sheet with the sheet loading position as a reference in printing.

  In order to realize the above-described transfer position alignment, it is desired to stop at a certain sheet loading position at the end of printing and at the completion of automatic loading of the continuous sheet 1 provided to reduce the work load on the apparatus operator. Control is in progress.

  As described above, in the continuous paper electrophotographic apparatus, control is performed so that the paper loading position when the continuous paper is stopped is always a constant position, and the printing position is determined by using the paper loading position as a reference for the transfer timing. The combination is realized.

JP 2000-127529 A

JP 2004-34468 A

  In the above-described continuous paper electrophotographic apparatus, if the paper loading position is deviated when the continuous paper is stopped for some reason, printing is performed on the assumption that the continuous paper is at a desired position.

  An object of the present invention is to check whether there is a paper loading position at a desired position before starting printing, and to reduce a printing deviation occurrence rate.

  The object is to form a continuous sheet having feed holes at intervals of 1/2 inch and an optical sensor capable of detecting the feed holes of the sheet, and N optical sensors are located at positions that follow the feed holes of the sheet. This is achieved by checking the amount of deviation of the paper loading position from the position of the sensor that has detected the feed hole by arranging them at intervals of 1 / (2.N) inches.

  Further, this is achieved by providing a display that is turned on when the optical sensor feed sensor detects a feed hole, and turned off when it is not detected.

  Further, it is achieved by collating the sheet length information with the detection state of the optical sensor and, if they do not match, displaying an error or prohibiting the operation of the apparatus.

  In addition, this is achieved by performing the detection operation at the start of printing, at the end of automatic loading, or at the end of printing.

  According to the present invention, when the stop position does not coincide with the predetermined position before the start of printing, it is possible to prevent the printing misalignment by stopping the error display or the operation of the apparatus. Waste and re-printing work can be reduced.

  Hereinafter, the present invention will be described by way of examples.

  In FIG. 1, the sensor 7 includes three optical sensors 4, 5, 6 arranged at 1/6 intervals in the paper conveyance direction, and detects the feed hole 2 of the continuous paper 1 passing over the sensors 4, 5, 6. It has a structure that can be done.

  Next, a method for detecting the paper loading position will be described with reference to FIG. Since the feed holes 2 of the continuous paper 1 are usually formed at intervals of ½ inch, when the sensor 4 detects the feed hole among the three sensors 4, 5, 6, the positional relationship of each is shown in FIG. It becomes street. Here, the distance from the top of the page when the paper conveyance is stopped to any one of the three optical sensors 4, 5, 6 is configured to be a multiple of 1/6 inch. Since the paper length of the page is usually a multiple of 1/6 inch, the positional deviation of the feed hole 2 can be detected.

  That is, when the sheet length is 11 inches and the apparatus is configured so that the distance from the page head position to the sensor 5 when the sheet conveyance is stopped is 11 inches, the stop position of the sheet 1 is at a predetermined position. At this time, the sensor 5 detects the feed hole and can detect that the continuous paper 1 is stopped at the correct position. Under this condition, when the sensor 4 or the sensor 6 detects the feed hole 2, since the continuous paper 1 is not stopped at a predetermined position, an error display or the operation of the apparatus needs to be stopped.

  Further, when the paper length is 11 inches + 1/6 inch in the same configuration as described above, when the sensor 4 detects the feed hole, it indicates that the paper is stopped at the correct position. Therefore, when the sensor 5 or the sensor 6 detects the feed hole 2, since the paper is not stopped at a predetermined position, an error display or the operation of the apparatus needs to be stopped.

  Similarly, when the paper length is 11 inches to 1/6 inch in the same configuration as described above, when the sensor 6 detects the feed hole 2, it indicates that the continuous paper 1 is stopped at the correct position. Therefore, when the sensor 4 or the sensor 5 detects the feed hole 2, the continuous paper 1 is not stopped at a predetermined position, so that an error display or the operation of the apparatus needs to be stopped.

  As described above, when the sensor is composed of the three optical sensors 4, 5, and 6 arranged at intervals of 1/6 in the paper conveyance direction, the continuous paper 1 whose paper length is a multiple of 1/6 inch is used. On the other hand, it is possible to detect whether the continuous paper 1 is stopped at a predetermined position.

  Further, when the sensor is composed of N optical sensors arranged at 1 / (2.N) intervals in the sheet conveyance direction (N is an integer of 2 or more), the sheet length is 1 / (2.N It is possible to detect whether or not the continuous paper 1 is stopped at a predetermined position with respect to the continuous paper 1 that is a multiple of inches.

  In the above example, the sheet length and the distance from the page head position to the sensor 5 when the paper transport is stopped are 11 inches. However, the sensor 4 or the sensor 5 or the sensor from the page head position when the paper transport is stopped. Similar detection is possible if the apparatus is configured such that the distance to 6 is a multiple of 1 / (2 · N) inches.

  Although it is conceivable to perform printing on the continuous sheet 1 having various sheet lengths as described above with the same apparatus, in this case, the distance from the page head position to the sensor when the sheet conveyance is stopped cannot be changed. It is convenient to provide a function for automatically stopping the operation by giving paper length information to the control unit of the apparatus in advance, checking whether or not the stop position matches a predetermined position.

  Further, if the LED corresponding to each of the N sensors is provided in the display unit of the apparatus, and the sensor is provided with a display part in which the LED is turned on when the feed hole 2 is detected, the apparatus stores the sheet length. The operator can easily determine whether the stop position matches the predetermined position.

  In FIG. 3, 8 is a tractor drive unit, and 9 is a photosensitive drum.

It is a figure of the structure for applying this invention. It is the figure which showed the positional relationship of a feed hole and a sensor in the state which the sensor detected the feed hole. It is a figure which shows the structure for applying this invention.

Explanation of symbols

1 is a continuous paper, 2 is a feed hole, 3 is a perforation, 4, 5 and 6 are optical sensors, 7 is a sensor, 8 is a tractor drive unit, and 9 is a photosensitive drum.

Claims (6)

  A continuous sheet having feed holes at intervals of 1/2 inch and an optical sensor capable of detecting the feed hole of the sheet, and N optical sensors at positions following the feed hole of the sheet, 1 / ( 2 · N) A continuous paper electrophotographic apparatus having an interval of inches, and any one of the optical sensors detects the feed hole.   2. The continuous paper electrophotographic apparatus according to claim 1, further comprising a display that is turned on when the optical sensor detects the feed hole and is turned off when the optical sensor is not detected.   2. The continuous paper electrophotographic apparatus according to claim 1, wherein the sheet length information and the detection state of the optical sensor are collated, and if they do not coincide, an error display or operation is prohibited.   4. The continuous paper electrophotographic apparatus according to claim 3, wherein the error display or operation prohibition is performed at the start of printing.   4. The continuous paper electrophotographic apparatus according to claim 3, wherein the error display or the operation prohibition of the apparatus is performed at the end of automatic loading. 4. The continuous paper electrophotographic apparatus according to claim 3, wherein the error display or the operation prohibition of the apparatus is performed at the end of printing.

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