JPS624166A - Remainder detecting system for roll-like wound material - Google Patents

Abstract

PURPOSE:To shorten a convey path, make a detection mark unnecessary, make a device small-sized, and reduce the operation cost by providing a rolling hole section at the bottom of a storage container, arranging detectors, and detecting the rotation of a roll-like wound material. CONSTITUTION:When the remainder of the roll paper 1a of a roll body 1 is large, the outer diameter is large and the roll body 1 is located at the upper section of a container 21, and when the remainder is small, it is moved to the lower section. When it passes detectors 24a, 24b during this shift, remainder detection signals are generated and displayed on a remainder display unit. In addition, when the remainder becomes nearly zero, it is detected by a detector 7 in a hole 23 to generate a paper exhaustion detection signal. Accordingly, the general-purpose roll paper 1a can be used, with a convey path shortened and the detection mark on the roll paper 1a made unnecessary. Furthermore, an operator can know the midway progress of the remainder, estimates the replacement timing, and reduce a trouble of paper exhaustion during recording. Therefore,the device can be made small-sized, and the operation cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a method for detecting the remaining amount of a rolled material such as a rolled paper used for recording reception of a facsimile machine.

[Technical background of the invention and its problems]

For example, a facsimile machine generally uses a roll set for receiving and recording, and performs recording by rewinding this roll paper and supplying it to a recording scanning section. FIG. 3 shows an example of its configuration. In the figure, a roll paper 1a is housed in a container 2 in the form of a roll body 1 wound around a core 1b, and in this state, a roll [1a is a roll body 1].
The paper is pulled out from the printer and set in a recording scanning section consisting of a recording head 5 and a platen roller 6. Then, when the received recording information is generated and recording scanning is started in the recording scanning section, it is unwound from the roll body 1 according to the rotation of the platen roller 6 of the recording scanning section and is continuously supplied to the recording head 5. Note that 3 and 4 are guides for guiding the roll paper 1a to the recording scanning section.

By the way, this type of device needs to detect when the roll paper 1a breaks during recording and stop the recording scan, so it is necessary to detect the roll paper 1a break by some means. . Therefore, in the past, for example, as shown in FIG. 3, the roll paper 1a from the container 2 to the recording scanning section! A detector 7 made of, for example, a microswitch is disposed in the feeding path, and the detector 7 detects passage of the end of the roll paper 1a, thereby generating a signal that the roll paper 1a is out. However, in such a conventional detection method, the detector 7 is disposed in the conveyance path of the roll paper 1a, so the conveyance path becomes long, leading to an increase in the size of the device, and the detector 7 Problems such as damage to the roll paper 1a may occur.

On the other hand, an optical switch is used as a detector, and the roll paper 1
For example, a detection mark 1 as shown in Fig. 4 is placed near the end of a.
There is a device in which a cutout or the like is provided, and by detecting the detection mark 1C or the cutout, the breakage of the roll paper 1a is detected. With such a system, problems such as damage to the roll paper 1a can be reliably prevented. However, the disadvantage of a long conveyance path still remains unsolved, and furthermore, it is necessary to provide detection marks and notches on the roll paper 1a.
A had the disadvantage of being expensive.

[Purpose of the invention]

The present invention makes it possible to shorten the length of the conveyance path by eliminating a detector from the conveyance path of the sheet-like body, and also eliminates the need to provide detection marks etc. on the sheet-like body, making it possible to use a general-purpose sheet-like body. It is an object of the present invention to provide a method for detecting the remaining amount of a rolled material, thereby making it possible to downsize the device and reduce operating costs.

[Summary of the invention]

In order to achieve the above object, the present invention takes into consideration the fact that the diameter of the rolled material changes according to the remaining amount, and provides a rolling hole at the bottom of a storage container for the rolled material. A detector is disposed at a desired position within the rolling hole, and as the remaining amount decreases, the rolled material rolling through the rolling hole is detected by the detector to generate a remaining amount detection signal. This is what I did to get it.

[Embodiments of the invention]

FIG. 1 shows the configuration of a recording apparatus to which a remaining amount detection method according to an embodiment of the present invention is applied. Reference numeral 11 indicates a container that accommodates a roll body 1 as a rolled material.

The roll body 1 is housed in the container 11, and the roll paper 1a pulled out from the roll body 1 is guided by a guide 13 and led to a recording scanning section consisting of a recording head 5 and a platen roller 6.

By the way, a rolling hole 12 is provided at the bottom of the container. This rolling hole portion 12 has an inner diameter R of the core 1b of the roll body 1.
This is set to be slightly larger than the outer diameter of the roll paper 1a, so that the roll body 1 rolls into the rolling hole 12 when the remaining amount of the roll paper 1a becomes approximately zero. A detector 7 is installed at the bottom of the rolling hole 12. This detector 7 is composed of a microswitch equipped with an actuator 7a, and the actuator 7a detects the roll body 1 rolling in the rolling hole 12, and generates a paper break detection signal at this time.

With this configuration, when there is a sufficient amount of roll paper 1a remaining, the roll body 1 rotates while being supported by the bottom and side surfaces of the container 2, as shown in A in the figure, but when the roll paper 1a remains When the remaining amount decreases to approximately zero, the outer diameter becomes less than the inner diameter R of the rolling hole 12, and the ball rolls and falls into the rolling hole 12 as shown at the opening in the figure. Then, at this point, the detector 7 detects the fall of the roll paper 1a, which generates a paper break detection signal to notify, for example, a recording control circuit of the paper break, and the recording operation is stopped.

Therefore, in this example, roll paper 1a is processed using the conventional method.
Since the detector 7 provided in the conveyance path is no longer necessary, the length of the conveyance path can be shortened by the installation space of this detector 7, and thereby the apparatus can be downsized. Furthermore, since the detector 7 is configured to detect when the roll paper 1a of the roll body 1 has become approximately zero, damage to the roll paper 1a during use is prevented, and high-quality recording results can be obtained. Obtainable. Furthermore, since there is no need to provide a detection mark or the like on the roll paper 1a, a general-purpose roll paper 1a can be used, thereby reducing operating costs.

On the other hand, FIG. 2 shows a recording apparatus to which a remaining amount detection method according to another embodiment of the present invention is applied.

In the figure, the bottom of the container 21 is an inclined surface,
The roll body 1 is accommodated between this inclined surface and the side surface. Further, at the lowest part of the inclined surface, a hole 23 is provided, the inner diameter of which is set slightly larger than the outer diameter of the core 1b of the roll body 1, as in the above embodiment. A detector 7 for use is provided. Furthermore, a plurality of (two in the figure) detectors 24a and 24b are arranged at a predetermined interval in the middle of the inclined surface. These detectors 2
4a and 24b are both the detectors 7 for detecting the paper breakage.
Similarly, when the roll body 1 rolls to a corresponding position on the inclined surface, it generates a detection signal representing the remaining amount at that time.

With such a configuration, the roll body 1 has the roll paper 1a.
When there is a sufficient amount remaining, the roll paper 1a is located above the container 21 due to its large outer diameter, and as the roll paper 1a is consumed, it moves downward along the inclined surface as shown in FIG. When the vehicle passes through the detectors 24a and 24b during this movement, a remaining amount detection signal is generated from the detectors 24a and 24b, and is displayed on, for example, a remaining amount display on the operation panel. Therefore, the operator can know the progress of the remaining amount by visually checking this remaining amount indicator. Further, when the remaining amount of the roll paper 1a in the roll body 1 becomes approximately zero, the roll body 1 rolls in the hole 23 as shown at the opening in the figure, and this rolling is detected by the detector 7, and as a result, paper breaks. A detection signal is generated.

As described above, in this embodiment, the length of the conveyance path can be shortened as in the previous embodiment, thereby making it possible to downsize the apparatus, and there is no need to provide detection marks etc. on the roll paper 1a. Since the roll paper 1a is flexible, a general-purpose roll paper 1a can be used, and as a result, operating costs can be reduced. Furthermore, since it is possible to detect the intermediate progress of the remaining amount, it is possible to predict in advance when the roll ff11a will be replaced, and thereby to minimize the problem of running out of paper during recording.

Note that the present invention is not limited to the above embodiments.

For example, in each of the above embodiments, a detector that performs mechanical detection using an actuator is used, but a photodetector may also be used. Further, other than recording paper, roll paper, rolled metal plate, rolled resin, etc. used for purposes other than recording may be used. In addition, various modifications may be made to the structure of the rolling hole portion, the number of installed detectors, the installed positions, etc. without departing from the gist of the present invention.

〔Effect of the invention〕

As described in detail above, according to the present invention, focusing on the fact that the diameter of the rolled material changes according to the remaining amount, a rolling hole is provided at the bottom of the container for storing the rolled material, and the rolling hole is provided at the bottom of the container for storing the rolled material. A detector is disposed at a desired position within the moving hole, and a remaining m detection signal is obtained by detecting with the detector a rolled material rolling through the rolling hole as the remaining amount decreases. By doing so, the length of the conveyance path can be shortened by eliminating the detector from the conveyance path of the sheet-like object, and the need for providing detection marks etc. on the sheet-like object can be eliminated, allowing the use of a general-purpose sheet-like object. As a result, it is possible to provide a method for detecting the remaining amount of a rolled material, which can reduce the size of the device and reduce operating costs.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the configuration of a recording device to which the remaining amount detection method is applied in one embodiment of the present invention, and FIG. 2 is a side sectional view showing the configuration of a recording device to which the remaining amount detection method is applied in another embodiment of the present invention. 3 is a side sectional view of a recording apparatus to which a conventional residual detection method is applied, and FIG. 4 is a perspective view showing an example of roll paper conventionally used. DESCRIPTION OF SYMBOLS 1... Roll body, 1a... Roll paper, 1b... Core, 5... Recording head, 6... Platen roller, 7...
...Detector, 7a...Actuator, 11.21.
...Container, 12°23...Rolling hole portion, 22...Slanted surface, 24a, 24b...Detector. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (3)

[Claims] (1) In an apparatus for unwinding and using a sheet-like object wound into a roll, the roll-like object is placed on the bottom of a container that accommodates the rolled object. A rolling hole that rolls according to the change is provided, a detector is provided at a desired position of the rolling hole, and the detector detects the rolling of the rolled material to detect the remaining amount. A method for detecting the remaining amount of a rolled material, characterized by generating a signal. (2) The rolling hole portion has an inner diameter at which the rolled material rolls when the diameter of the rolled material reaches a value corresponding to zero remaining amount or a state close to zero. ) method for detecting the remaining amount of the rolled material. (3) The rolling hole has two sides that gradually approach each other toward the depth, and the rolled material rolls in contact with these sides according to changes in its diameter. A method for detecting the remaining amount of a rolled material according to claim (1).