JPS6179691A - Leftover detection of rolled recording paper - Google Patents

Abstract

PURPOSE:To make detection of leftover low-priced high precision roll paper quantity possible by detecting a leftover quantity of recording paper on the basis of detection results of identification information. CONSTITUTION:A control block 15 makes a logic sum signal of an output signal of a reflective photosensor 14 and a drive pulse signal to be supplied to a drive block 16 for rotating a platen roller 13, and measures a length of pattern by calculating the number of continuous pulses in this logic sum signal. The control block 15 reads from a memory 17 leftover length indication data corresponding to the counted number of pulses and sends it to a display block 18. The display block 18 indicates a leftover length of recording paper based on inputted leftover length of recording paper based on inputted leftover indication data, but the content of indication is not updated until a next pattern is detected. Thus it is made possible to accurately detect a leftover length of rolled recording paper under a simple configuration without depending upon a complicated mechanical structure.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to the remaining length of a roll of recording paper formed by winding recording paper? [Technical Background of the Invention] Conventionally, a remaining amount detection mechanism for a roll of recording paper such as a facsimile machine has been constructed as shown in FIG. Figure 5 shows the configuration of this conventional detection mechanism? This will be explained in detail using In the fifth factor, the roll-shaped recording paper 51 is rotatably supported by the support shaft 2, and the playing plate 3 has a nine rotation shaft 4 and this rotation shaft 4? A pressing force is applied to the roll of recording paper 51 by a lever 5 that rotates at the center at a predetermined angle with respect to the brake plate 3, and a spring 6. The arrow points in the direction of the heart. Also, a wire 7 is connected to the tip of the lever 5, and the other end of the wire 7 is connected to the tip of the lever 5. Furthermore, an indicator needle 10 is attached to the wire 7, and the indicator needle 10 is connected to the spring 9 through the 78 ft.
It is configured to move in a direction.

Next, we will explain the operation of this detection mechanism on the O recording paper σ.
, the roll diameter of the rolled recording paper at this time becomes shorter in accordance with the amount of conveyed recording paper, so that the recording paper roll 1 The position of the press-contact brake plate 3 changes in the direction of arrow A 0 The change Sagi stile 1 Rotation axis 4 ? The information is transmitted to the intervening lever 5, which in turn is transmitted to the wire 7, which moves the indicator needle 10 to display the remaining amount of the roll of recording paper l.

[Problems with background technology]

The above-mentioned detection mechanism has a mechanical structure using a complicated mechanism, resulting in extremely high costs and large space requirements, resulting in the entire device becoming large. Furthermore, complicated adjustments were required during manufacturing.

In addition, the accuracy of detecting the remaining amount depends on the diameter of the roll of recording paper, so it depends on the paper thickness, etc. The drawback was that it could not be done.

[Purpose of the invention]

Does this invention have the above drawbacks? Remove complex mechanical @fl#
To provide an inexpensive and accurate method for detecting the remaining amount of rolled recording paper without the need for 'l. Objective 〇 [Summary of the invention] Does the above objective of the present invention include the length from the end? Recording paper with identifying information provided in multiple locations from the beginning to the end? When the recording paper is extracted from a roll of recording paper wound into a roll, the identification information? Detect and determine the remaining amount of recording paper based on this detection result? This can be achieved by detecting.

[Examples of invention]

Hereinafter, a detailed explanation will be given based on an embodiment of the present invention used in an 8At facsimile machine of the present invention. Fig. 1 is a configuration diagram for explaining an embodiment of the present invention, and Fig. This is a diagram showing a recording paper wound around a roll of recording paper used in one embodiment.
The recording paper is transferred from this roll of recording paper l to the platen roller 13.
and recording head 12? Derived through °C. The recording paper wound around this roll of recording paper l is shown in FIG.
, the length differs every predetermined length from the end of the recording paper. A pattern that is identification information is provided on the back side of the recording paper. For example, a pattern with a length of 15 cm at a position 1 m from the end,
T at the 2m position! Loc! ! A pattern having a length corresponding to the length from the end of the recording paper, such as a pattern with a length of L, is provided on the recording paper. Platen roller 1
A before 3.

Is the reflective type 7 sensor 14 in hη pattern? This reflective photo sensor 14, which is installed at a position where it can be detected, outputs an aOFF signal at the white part of the recording paper, and outputs an ONN signal amount at the portion of the pattern, and outputs from this reflective photo sensor 14. At the traffic lights! A raccoon phase signal of the e-reflection photosensor 140 output to the control part 15 sent to the lJ and both parts 15 and the drive pulse signal supplied to the drive part 16 for knee rotation of the platen roller 131h? Create and number of consecutive pulses in this disjunction? How long should the pattern be to count? Measurement 66 Control unit 15i Corresponds to the number of pulses counted. Remaining amount length display data is read out from memory 17 and sent to display unit 18.
Data indicating the length of the recording paper corresponding to the length of the pattern expressed by the counted number of pulses is stored in advance.Display section 189') The input remaining length is stored in advance. Displays the remaining length of recording paper based on the data shown0
At this time, the 1 display content will not be updated until the next pattern is detected, so if you line up the display, you will see "Remaining fII - Mr. 1m ~ 2m".
It is appropriate to add width to length such as mJ.

In addition, if the pattern 8E is output and rS, the number of drive pulses supplied to the drive section 6 is calculated, and based on the counted number of drive pulses, the length of the remaining position between the patterns is 2rOmxα. You can also show the public one by one like this: ``Furthermore, calculate the length of the remaining recording paper and how many A4 size sheets are left in the original width, and say ``There are A4 sheets left in A4 size.'' According to the present study, the remaining length of the roll of recording paper can be reliably achieved with a simple configuration without using a complicated invasive mechanism. Furthermore, if necessary, the number of r-driving pulses supplied after pattern emergence is counted, and roll-shaped recording is performed extremely accurately based on this number of driving pulses and the number of pulses obtained by pattern detection. The length of the remaining amount of paper can be detected. Also, in this embodiment, if the length of the pattern provided on the recording paper is known, the length of the remaining amount of paper can be determined.

A half-used roll of recording paper? Is it a pattern even when used?
Remaining length easily by detecting? Can be detected.

In addition, as another example of the rolled recording paper used in the present invention, as shown in FIG. 3 or FIG. They may also be arranged vertically.

In the above embodiment, the recording paper is guided to the pulse motor, so if you look at it microscopically, it is possible that the recording paper is stopped at the time of pattern detection. Furthermore, the present invention is not limited to the above-mentioned embodiments; for example, if the pattern is a character pattern, and this character pattern t pattern recognition R-f especially the remaining length of recording paper? It may be detected.@Also, it may be provided by any means such as printing, coloring, pasting, etc. on the pattern provided on the recording paper. Another different pattern in one color? It may also be used as identification information.

〔Effect of the invention〕

According to the present invention, it is provided on the recording paper. Is the identification that represents the length t from the end? Since the remaining amount of recording paper is detected by

[Brief explanation of drawings]

Fig. 1 is a configuration diagram for explaining an embodiment of the present invention, Fig. 2a is a diagram showing recording paper wound around a roll of recording paper used in an embodiment of the present invention, sI3 Fig.S Fig. 4 shows another example of rolled recording paper? FIG. 5 is a diagram for explaining the conventional remaining amount detection fIAwv. ...brake plate, 4... rotating shaft, 511 fist...
Lever, 6.9--Suffling, 7--Wire, 8--Pulley, 10, I8... Friends.

Claims (1)

[Claims] The identification information is detected when the recording paper is pulled out from a roll of recording paper, which is formed by winding a recording paper in which identification information indicating the length from the trailing edge is provided at a plurality of locations from the starting edge to the trailing edge. and detecting the remaining amount of the recording paper based on the detection result.