JPH05147341A - Device for displaying residual amount of rolled paper - Google Patents

Abstract

PURPOSE:To accurately display the residual amount of rolled paper by providing a means inputting a pulse signal obtained by detecting the quantity of rotation of the rolled raw paper to display the same when the number of said signals exceeds a preset number. CONSTITUTION:The pulse signal from a reflecting light sensor 22 is inputted to a CPU to count the number of signals. Since the diameter of roll raw paper 3 reduces when the number of printed papers increases with the advance of printing work and the rotation thereof becomes fast to increase the number of pulses, the diameter of the rolled paper 3, that is, the residual amount thereof can be calculated from the number of pulses generated per a unit time. Therefore, the number of pulses obtained when the residual amount of the rolled paper becomes a certain value is preset to the CPU to be compared with the number of generated pulses and, when the number of the generated pulses exceeds the set number, the signal at this time is outputted to a display part to be displayed thereon. An operator visually confirms this display outside a printing press to know the residual amount of the rolled paper 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll base paper residual quantity display device, particularly a roll base paper remaining perforated and incorporated in a stencil printing machine.

[0002]

2. Description of the Related Art Since a conventional roll base paper of this type is built into a stencil printing machine as described above, it is impossible to visually recognize the remaining amount which changes with its use. There was a problem that the cover had to be opened and closed in order to do so.

[0003]

In order to solve such a problem, there has been proposed one disclosed in Japanese Utility Model Laid-Open No. 2-95670, which is a roll supported in a printing press. According to the displacement of the lever that is pressed and driven by the surface of the raw paper, the displaced display portion is arranged so as to be visible from the outside of the printing machine. However, such a device has a large number of parts, has a complicated structure, and is expensive.

Therefore, an object of the present invention is to solve the problem of the conventional roll base paper remaining amount display device described above, to accurately display the roll base paper remaining amount, and to reduce the number of parts and to simplify the structure. There is an inexpensive residual quantity display device for roll base paper.

[0005]

In order to achieve the above-mentioned object, the present invention provides a pulse generating means for detecting a rotation amount of a roll base paper and outputting a pulse signal, and When the pulse signal is input and the number of pulse signals exceeds a preset number, it is provided with a display means for displaying the fact, and the invention of claim 2 is the invention of claim 1 In the roll base paper remaining amount display device, the roll base paper remaining amount is displayed step by step.

[0006]

In this invention as described above, in the invention of claim 1, when the roll base paper is unwound, the amount of rotation thereof is detected by the pulse generating means and a pulse signal is output, and this pulse signal is input to the display means. However, it is compared with the pulse number corresponding to the remaining amount set in advance here, and when the generated pulse number exceeds the set number, the signal is output to the display unit and displayed, and the operator By visually recognizing the display outside the printing machine, the remaining amount of the roll base paper is known. In this case, according to the second aspect of the present invention, the remaining amount of the roll base paper is displayed in stages, and it is predicted how much the remaining amount of the roll base paper will disappear.

[0007]

1 to 4 showing a first embodiment of the present invention, 1 is a cylindrical plate cylinder provided with a large number of ink permeation holes,
Reference numeral 2 is a clamper provided on the outer periphery of the plate cylinder 1, 3 is a roll base paper, and the roll base paper 3 is rotatably held by a holder 21 provided on the machine body 28 as shown in FIGS. The roll core 25 is fitted and held on the flange 20 so as to rotate integrally, and a plurality of reflection sheets 23 are radially attached to the outer surface of the flange 20.
A reflected light sensor 22 that detects the reflection sheet 23 and outputs a pulse signal is provided on the airframe 28 at a position facing 23. Reference numeral 4 denotes a plate-making thermal head, which is provided with a platen roller 5 facing it, 6 and 7 are feed rollers for the roll base paper 3, 8 is a cutter for the roll base paper 3,
9 is a plate discharge roller, 10 is a plate discharge box, 11 is a paper feed roller,
Reference numeral 12 is a separation roller, 13 is a registration roller, 14 is a press roller, 15 is a discharge belt, 16 is a peeling claw, 17 is a discharge tray, 18 is a paper feed tray, and 19 is a sheet. FIG. 4 shows a display means, which receives the pulse signal from the sensor 22 and outputs a signal when the number of pulse signals exceeds a preset number, and a CPU 29 which outputs the signal. A display unit 30 connected to the CPU 29 via a driver 32 to display an output signal from the CPU 29, and a ROM connected to the CPU 29.
31 and.

In the above, the plate cylinder 1 is rotated counterclockwise by a motor (not shown), the used base paper is peeled off by the plate discharge roller 9, and the plate discharge box 10 is used.
It will be abandoned and stopped. Then, the platen roller 5 is driven at a constant speed by a stepping motor (not shown) by the plate feeding signal, and the roll base paper 3 is moved to the thermal head 4
It rotates while pressing against the feed rollers 7, 8 while punching the roll base paper 3 in response to a signal from a reading unit (not shown).
Is conveyed to the clamper 2, the clamper 2 is closed, the plate cylinder 1 is rotated counterclockwise, the roll base paper 3 is wound around the plate cylinder 1, and the cutter 8 cuts the plate to an appropriate length to finish the plate feeding. To do. Then, the clamper 2 is closed, the plate cylinder 1 is rotated counterclockwise, and then the paper 19 is fed from the paper feed table 18 by the paper feed roller 11, the separation roller 12, and the separation roller 24 one by one by a paper feed signal. The timing is adjusted by the registration roller 13 and conveyed between the press roller 14 and the base paper. The press roller 14 presses the base paper for printing, and then the peeling claw 16 separates the paper and discharges it to the paper discharge tray 17. It In the above, when the roll base paper 3 is unwound, the flange 20 of the holder 21 rotates, and the reflection sheet 23 that is moved by the rotation of the flange 20 causes the reflected light sensor 22.
Outputs a pulse signal, and this pulse signal is input to the CPU 29, and the CPU 29 counts the number of this pulse signal by using the plate feeding signal as a trigger. In this case, as the printing work progresses and the number of plate making increases, the diameter of the roll base paper 3 decreases and the rotation speed increases, and the number of pulses increases as shown in FIG. 6. Therefore, from the number of pulses generated per unit time, Since the diameter of the roll raw paper 3 can be calculated, that is, the remaining amount of the roll raw paper 3 can be calculated. When the number of generated pulses exceeds the set number, the signal is output to the display unit 30 and displayed, and the operator visually recognizes this display outside the printing machine to check the remaining amount of the roll base paper 3. You will know. In this case, by setting a plurality of pulses to be set, it is possible to display the remaining amount in stages and predict how much the remaining amount of the roll base paper 3 will be consumed, and to know the replenishment time appropriately. You can

The second embodiment shown in FIGS. 7 and 8 is a reflection sheet.
23 and the reflected light sensor 22, instead of the slit 28 and the transmitted light sensor 26, the first embodiment, and FIGS.
The third embodiment shown in FIG. 3 is the same as the first and second embodiments except that the reflection sheet 23 and the slit 28 are not provided, and the sensor 27 including an encoder is provided instead of the reflected light sensor 22 and the transmitted light sensor 26. There is no difference including.

[0010]

The present invention is as described above. In the invention of claim 1, when the pulse generating means detects the rotation amount of the roll base paper and outputs a pulse signal, this pulse signal is input to the display means. Is compared with the preset number of pulses,
When the number of generated pulses exceeds the set number of pulses, the operator displays it and visually confirms this display on the outside of the printing machine, etc. where the roll base paper is installed to know the remaining amount of the roll base paper. Therefore, the remaining amount can be accurately known without opening and closing the cover of the printing machine or the like, and the number of parts is small, the structure is simple, and the cost is low. Claim 2
According to the invention of claim 1, the remaining amount of roll raw paper is displayed step by step in the remaining amount display device of roll raw paper according to claim 1. Therefore, it is possible to predict how much the remaining amount of roll raw paper will disappear. Therefore, there is an effect that the replenishment time can be appropriately known.

[Brief description of drawings]

FIG. 1 is a schematic front view of a first embodiment of the present invention.

FIG. 2 is a front view of the main part of the above.

FIG. 3 is a front view of a part of the above, which is a vertical section side.

FIG. 4 is a circuit diagram of the display unit of the above.

FIG. 5 is an operation explanatory view of the above.

FIG. 6 is a correlation diagram between the roll base paper diameter and the number of pulses in the above.

FIG. 7 is a front view of the essential parts of a second embodiment of the present invention.

FIG. 8 is a plan view of the above.

FIG. 9 is a front view of the essential parts of a second embodiment of the present invention.

FIG. 10 is a plan view of the above.

[Explanation of symbols]

 1 Plate cylinder 3 Roll base paper 20 Holder 21 Reflected light sensor 23 Reflective sheet 26 Transmitted light sensor 27 Encoder 28 Slit 29 CPU 30 Display

Claims (2)

[Claims] 1. A pulse generating means for detecting a rotation amount of a roll base paper and outputting a pulse signal, and a display for indicating that the pulse signal has been inputted and the number exceeds a preset number. A device for displaying the remaining amount of roll base paper, characterized by comprising: 2. The remaining amount display device for roll base paper according to claim 1, wherein the remaining amount of roll base paper is displayed in stages.