JPS58202246A - Residual sheets sensing device - Google Patents

Abstract

PURPOSE:To have simple and sure sensing of the remaining amount of sheets by furnishing a source and a photosensor at the sides of sheets and by allowing the beams from this source to irradiate the photosensor when the remaining amount becomes below a certain specific level. CONSTITUTION:A paper roll 11 consists of a long sheet of thermosensitive paper 12 which is wound round a core 13, and is fitted separably at a support of a facsimille receiver etc. through a shaft 14 fitted on this core 13. Here a source 15 and a photosensor are oppositely arranged on both sides of the roll 11, seen in its axial direction. If the amount of this roll 11 in the coarse of use is more than a certain specific level, beams emitted by the source 15 are reflected at the end face of the roll 11, so that the photosensor will receive no beams. If the residual amont becomes below the specified value, the beams are directly irradiated to the photosensor 16, which will then give a signal of beams being received. Thus it is informed that a scanty amount of roll 11 remains.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for detecting when a predetermined number of sheets of rolled paper or cut paper are left in a facsimile machine, printer, electronic copying machine, etc., for example. This paper relates to a paper remaining amount detection device that can be used.

For example, some facsimile receiving devices use roll paper, which is made by winding a long length of thermal paper, as recording paper for reception. I like this kind of horn 7 kushimiri! At the machine, according to the received - (ij number), the thermal head that is driven records its own information thermally on the thermal paper fed out from the roll paper, and cuts the recorded thermal paper into a predetermined length. Cυ
One toshi tray comes out.

An I-comb receiving device (such as a one) cannot receive data when the set roll paper runs out. There is also a device that is configured to alert the A-peller when the remaining amount of paper is running low.

As an example of such a conventional paper remaining amount detection device, there is one constructed as shown in FIG. In this device, a detection lever 2 is placed near the roll paper 1 to be set.
It is installed so that it can rotate freely using the center part of the groove as a support. The detection lever 2 is biased clockwise (=J) by a spring 3, and one end of A is brought into contact with the outer peripheral surface of the paper 1. When it is extended and its diameter decreases, the detection lever 2 follows this and changes to the time jJh.
It is gradually moved in the direction. When the remaining amount of the roll paper 1 becomes low and reaches a certain predetermined value, the other end of the detection lever 2 pushes the operating piece of the microswivel 5) to switch it.

When it is covered, an alarm is emitted by a lamp or sound, notifying the operator that the amount of roll paper 1 remaining is low.

However, in such a conventional device, the detection lever 2
Because one end is kept in constant pressure contact with the outer circumferential surface of the roll paper 1, contact marks are left on the thermal paper 1a (sometimes the appearance becomes hurried. Such a phenomenon may occur if recording is not carried out for a long time and the roll If the paper 1 was installed as is, it would be a problem. Also, the detection lever 2 would become unstable when the roll paper 1 was attached or removed, which was inconvenient.

Also, keep the roll paper 1 in constant contact with the detection lever 2! /=1
), there was a drawback that there was a restriction on the setting position of the small-sized 1-L paper 1. In addition, the detection lever 2 is installed so that it can rotate freely, and the spring 3 is used to 1.
- The disadvantage of press-contacting it to the paper 1 is that the structure is complicated and the installation space is large.

In addition, as other conventional paper out-of-paper detection devices, there is one that measures the amount of eel on U-ru paper and detects when the remaining amount reaches a certain predetermined value. Since the Φ amount is quite different depending on the size, it is necessary to supplement it to match the size.
It had to be a T L G, and had the disadvantage that the 4% composition was complicated.

The present invention has been developed in view of the above circumstances, and it is possible to detect when the remaining amount of paper, such as roll paper, has reached a predetermined value over a 4-day period without coming into contact with paper such as roll paper. (The purpose of the present invention is to provide an outside-of-paper i detection device that can be installed in a small amount of space and that is susceptible to bacterial damage.)

In the present invention, a light source and an A-trenley are used, and when the remaining amount of paper becomes less than a predetermined value, the light rays from the light source are sent to the photo sensor 1.
Thus, the above-mentioned objective is achieved.

The present invention will be described in detail with reference to the embodiments above.

FIG. 2 shows a perspective view of the first embodiment.

The roll paper 11 is made by winding the thermosensitive paper 12 into 2]713 rolls.
It is removably attached to a support portion of a facsimile receiving device (not shown) via the IF throat 14 fitted to the IF throat 713 . On the axial side of the roll paper 11, a light source 15 and a backlight 16 are provided facing each other. A line connecting the light source 15 and the photosensor 16 is parallel to the axis of the roll paper 11, and extends outward from the core 13.
It passes through a gap. The light source 15 may be a lamp, a laser, or the like. A laser is preferable because it provides very narrow light. Further, in the case of a lamp, a condensing device may be used together.

In this device, when the roll paper 11 is longer than a certain extent, the light rays emitted from the light source 15 are reflected by the end surface r of the roll paper 11. Therefore, no light beam is incident on the sensor 16.

[When the thermal paper 12 is fed out from the l-leaf paper 11 and the remaining amount of l-leaf becomes a certain predetermined value, the light source 15
The light rays emitted from the roll paper 11 are not reflected by the end face of the roll paper 11 and are incident on the photosensor 16 . 4, a small 4 detection signal was output from Fu No. 1, Shin 1 No. 16, and an alarm was issued by Funbuya Masa and others, informing the operator that there was less than 1 remaining on paper 11. Inform.

FIG. 3 shows a perspective view of the second embodiment.

In this embodiment, the top pin 16 is provided on the same side as the light source 15. This S! The light rays irradiated from the light source 15 are reflected from the edge C of the paper 11 on the lifting platform where the paper 11 is placed.
However, the detection signal t is not output from the photo sensor 16. D - When the remaining amount of roll paper 11 reaches a certain predetermined value, the light beam emitted from light source 15 is no longer reflected by the end face of roll paper 11 (it continues straight ahead). Upon receiving that the incident light has been turned off, the H sensor 16 outputs a detection signal, and an alarm device (not shown) is activated to issue a C alarm.

FIG. 4 shows a perspective view of the third embodiment, and FIG. 5 shows a partially omitted vertical sectional view taken along line 1--2. In this embodiment, a flange 21 is provided on the shaft 14 in order to prevent the 11-l paper 11 from moving in the axial direction and to correspond to the recording portion of the K surface of the C horn/shank receiver 48. 7. The flange 21 has a lattice-shaped structure and has a fitting hole 23 in which four protrusions 22 are formed in the center thereof. The shaft 14 corresponds to the four projecting pieces 22.
An engagement recess 24 is formed at a predetermined location. The four protrusions 22 are respectively engaged with these engagement recesses 24,
As a result, the flange 21 is attached to the shirt (14) while being prevented from moving in both the axial direction and the same direction.
1 is taken and 6J t-J are taken, and the roll paper 11 is placed between them.
are prevented from moving in the axial direction (provided). The two 7 flange 21 are arranged symmetrically. Therefore - CD
- When the remaining amount of paper 11 becomes low and reaches a predetermined value, a light beam from the light source 15 is irradiated onto the photosenser 16 through the gap between the cross sections of the flange 21. When the photon 4116 is stacked on the same side as the light source 15, the flange 21 on the opposite side may be a disc 11. Further, if the shaft 14 is divided into two parts, it is easy to attach and detach the 1"-sized paper 11 to and from the shaft 14.

Note that in the above embodiment, the case where the paper is 11-sized paper is explained, but it may also be cut paper cut into a predetermined IJ chair.For example, as shown in FIG. In the case of a device that feeds out a plurality of set sheets of cut paper 32 one by one from the upper layer using a neutral drawer 733, as can be easily understood from the above explanation,
The light m indicates that the remaining amount has become low and has reached a certain predetermined value.
15 and] can be detected by the sensor 16.

Further, in the above embodiment, the light source 15 and the notebook sensor 16 are fixedly installed, but the present invention is not limited to this. For example, they can be connected in the radial direction of the UJ-roll paper 11 or in the stacked form of the cut paper 32 through a guide such as a branch hole. It may be provided so that the position can be freely adjusted in the direction b. In this way, it is possible to adjust the remaining amount of paper for which an alarm should be issued.

As explained above, according to the present invention, it is possible to detect when the remaining amount of paper has shifted to 1.0 cm or more by using a light source and 7 adjustment sensors, so that it is possible to No trace of contact will be left. Also, since it is a non-contact type, it is easy to check the paper size, and there is no restriction on setting small size paper. Furthermore, it has the advantage that the configuration is simple and the installation space is small.

[Brief explanation of drawings]

Figure i11 is a side view of an example of a conventional paper remaining amount detection VR device, and Figure 2 is a perspective view of the first embodiment of the present invention.
FIG. 3 is a perspective view showing the second embodiment, FIG. 4 is a perspective view of the third embodiment, FIG. FIG. 6 is a small perspective view of still another embodiment.

Claims (1)

[Claims] It is equipped with a light source installed opposite to one side of the paper made of set roll paper or cut paper, and a photo sensor installed on the same side as the light source or on the opposite side with the paper in between. A paper remaining amount detection device characterized in that when the remaining amount becomes less than a predetermined value, a light beam from a light source stops or begins to be irradiated onto a photosensor.