JPS58215379A - Feeder for continuous fan-fold paper - Google Patents

Abstract

PURPOSE:To enable the setting of pages to be automatically made by driving a feeder for continuous fan-fold papers by the output of logical operation circuit or command of sub-scanning to be reset by TOF command and constant value count of sprocket hole in a serial printer. CONSTITUTION:The moving number of a sprocket hole for continuous fan-fold papers is detected by a sensor 11, the number of the holes is counted by a binary counter 13, the position signal of a page header is sent out from NAND gate 14, and the counter 13 is reset. Also, D-flip-flop 16 to be set by TPF signal 22 is reset. The output control signal becomes a drive signal at TOF mode by a digital sweep circuit 18 and enters with sub-scanning drive signal 21 at the time of printing into OR gate 17, whereby controlling the moving of papers through a sub-scanning drive motor 20. Thus, even when printing is completed in any portion of one page of a paper, the papers can be moved to the page header at the top portion of the next page without fail by TOF command, particularly effectively for the printing of patterns.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous fan-hold paper feeding device that utilizes a page header detection method for recording paper in a printer, particularly continuous fan-hold paper.

Conventionally, little consideration has been given to page headers of recording paper in serial printers or line printers used to print characters, numbers, symbols, etc., which are mainly used as computer peripheral terminal devices. As shown in FIG. 1, a conventional continuous fan-hold paper 1 used in this type of printer has one page, that is, 11 inches between two perforations, and has several paper widths ranging from 4 inches to 15 inches. 3
is the sprocket hole. Normally, the print data sent to a printer from a combinator or similar data source is continuous, and the amount of data can range from a few lines to tens or even hundreds of lines. This occurs randomly, and there is no consideration given to the pages, such as printing on a page-by-page basis on paper used by peripheral terminal printers, outputting on a page-by-page basis, or classifying data on a page-by-page basis.

However, in order to make the print results easier to read and data organized, it is necessary to use a line break operation to create a blank space at the end of a series of print data, or to start printing a new series of data. Therefore, operations such as manual or automatic page change are necessary, and this function is essential for printers as peripheral terminal equipment. Conventionally, printers used as peripheral terminal devices, especially printers for reception only, have a page break function called T○F (Tonope of Form) which serves the above purpose.

In this TOF mode, when a command is input, paper is fed for one page of continuous fan hold paper or a preset amount at a speed faster than the paper feed speed during normal printing, but there are some drawbacks in terms of functionality. .

First, the paper feed amount in TOF mode is fixed.

Second, even if the above paper feed amount is programmable, the paper feed amount is fixed in advance, so no matter where printing ends in the middle of the page, the TOF mode results in the beginning of the next page. It is not always the case that a certain number of students will appear. In this way, conventional paper feeding devices such as the TOF mode simply feed the paper by a fixed amount, and do not detect the top of the page to control the paper feeding. cannot feed paper.

In addition to the conventional TOF mode, the present invention detects the complete top of the page and controls paper feed.
No matter which part of the page is finished printing, the setting of the top part of the next page is automatically done by the TOF operation. This function is particularly effective in printers that can also print graphics. An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2a is a diagram showing a mechanical part in an embodiment of the present invention. 1 is the continuous fan hold paper shown in Figure 1,
There are sprocket holes 3 for paper feeding and scanning on both ends for 1 page.
22 pieces are formed per inch length. 2 is a perforation. Continuous fan hold paper 1 is driven by sub-scanning drive motor 5
A paper feed pulley 4 connected to the paper via a belt 6 or the like engages with the sprocket hole 3 and rotates, thereby moving.

The optical sensor A detects the movement of the continuous fan hold paper 1.
8 is fixedly installed at an arbitrary location of the passage point of the sprocket hole 3, it becomes possible to detect and count the passage status of the sprocket hole 3. In this case, although not shown, if you remove the fan hold paper 1 and place a light source on the opposite side of the sensor A8, and the light from this light source is irradiated to the optical sensor A8 through the sprocket hole 3, spec r, Detection and counting of holes 3 can be performed more reliably.

FIG. 2 is an embodiment showing another method of counting sprocket holes 3. In this embodiment, a disk 10 is fixed on a drive shaft of a paper feed pulley 4 that engages with a sprocket hole 3. Cuts or slits are formed on the circumference of the disc 10 at intervals equal to the pitch of the sprocket holes 3.

Since the disc 10 rotates in synchronization with the paper feed pulley 4, the sprocket and gutter system counts as the paper 1 moves are calculated by the disc 1.
This can be done by counting 0 cuts, pickpockets, and throats using the optical sensor B9.

Further, the number of sprocket holes 3 can be counted in the same way by installing a magnet instead of forming a cut or slit in the disc 1o and using a Hall element sensor instead of the optical sensor 9.

The output signal of sensor 8 or sensor 9 corresponding to the displacement of the continuous fan-held paper is inputted to the page header detection circuit shown in FIG. 3. This circuit counts the number of sprocket holes 3 included in one page of fan-hold paper 1 or the number of pulses generated in accordance with the displacement of the paper by other methods, and as a result of paper movement, the number of pulses is calculated to reach the page header area. sub-scanning 1 with a circuit that detects this and a TOF command.
It consists of a control circuit and a sub-scanning drive circuit that set the drive circuit system and reset it using a page header detection circuit output signal. A signal detected by a sensor 11 (corresponding to sensor A8 or sensor B9) of the displacement of the continuous fan hold paper 1 is inputted to a pinary counter 13 via a Schmidt inverter 12. The pinary counter 13 counts 22, which corresponds to the number of sprocket holes 3 included in one page of continuous fan hold paper in this embodiment, and outputs the output pulse from the NAND gate 14, that is, a signal that detects the page header point. Output.

The NOR gate 15 receives a detection signal for a portion of the previous page header and an initial reset signal 23, and resets the counter 13 at the start of operation or when a portion of the page header is detected.

The D-flip-flop 16 is set by the TO'F command pulse signal 22 and reset by the detection signal of part of the page header. Therefore, even if the TOF command signal is input at any position on one page, the paper is always moved to the page header section at the beginning of the next page. A control signal output from the D flip-flop 16 gates the digital sweep circuit 18 . This digital sweep circuit 18 is used because this embodiment uses a stepping motor as the sub-scanning drive motor 20. If the drive motor 20 is another type, such as a DC motor, it needs to be changed to adapt to it. There is.

The digital sweep circuit 18 is a pulse repetition frequency sweep circuit determined by the paper moving speed in the TOF mode, the self-starting frequency of the drive motor 20, and the maximum response frequency characteristics. The output signal of the digital sweep circuit 18, that is, the drive signal in the TOF mode and the printing time scan drive signal 21 are input to the OR gate 17, and the output signal is applied to the sub-scan drive motor 20 via the motor driver circuit 19, and the output signal is applied to the sub-scan drive motor 20, , that is, the paper is moved. When the paper is fed to the top of the next page, the D flip-flop 16 is reset, and unless the printing time scan 1 drive signal 21 is input, the sub-scanning ends and preparations are made for the next recording. When the next recording starts, sub-scanning is started again by the printing time scan drive signal 21, and when the TOF mode is entered, the above-mentioned operation is repeated.

In addition, when the count value of the binary counter 13 becomes an integral multiple of the number of sprocket holes 3 included in one page, the NA
By obtaining an output from the ND gate 14, it is also possible to detect a portion of the page header for each page corresponding to the integer.

Another example is the pinary counter 13 in FIG.
It is also possible to replace the functions of the D flip-flop 16 and digital sweeper 18 with software, and to replace this page header detection function with a microcomputer.
Furthermore, by expanding the page header detection function, it is also possible to realize a continuous page forwarding function based on the number of continuous inputs of TOF commands, or by using other setting methods.

The present invention has been described in detail based on the embodiments above, but according to the present invention, no matter where printing is completed on one page of continuous fan hold paper, the top of the next page is detected as a result of the TOF command. Page settings can be automatically performed, and this effect is particularly effective when printing figures in addition to the conventional printing of numbers and symbols.

[Brief explanation of the drawing]

The perspective view and FIG. 3 are schematic diagrams of a drive circuit configuration in an embodiment of the present invention. 1... Continuous fan hold paper, 2...
・Perforation, 3... Sprocket, hole, 4...
... Paper feed pulley, 5... Sub-scanning drive motor,
6...Belt, 8...Sensor A19...
...Sensor B110...Disc, 11...
・Sensor, 12... Shumi, throat inverter, 13... Pinary counter, 14...
NAND gate, 16...NOR gate, 16
...D flip-flop, 17...OR
Gate, 18... Digital sweeper circuit, 19.
...Motor driver, 20... Sub-scanning drive motor, 21... Printing tense scanning drive signal, 2
2...TOF pulse signal, 23...Initial reset signal.

Claims (1)

[Claims] means for counting the sprocket holes of the continuous fan hold paper; a logic circuit that is set by the TOF command and reset when the counting means counts a certain value; 1. A continuous fan-hold paper feeding device, characterized in that it is equipped with a scanning drive means.