JPS5878944A - Roll paper feed control in copying machine - Google Patents

Abstract

PURPOSE:To prevent sheets of paper from jamming in a paper supplying mechanism in a copying machine for feeding a long sheet of paper to a cutter and cutting off it at a predetermined length for use by detecting positively the feed shortage of the sheet with a sensor between a paper feeding roller and roll paper. CONSTITUTION:In a roll paper supplying mechanism of a copying machine which is used to cut off a long sheet of paper fed to a cutter at a predetermined length, sensors 10 for detecting the presence of paper are provided between roll papers 1, 2 and paper feeding rollers 4 for sending the paper to a cutter 5. When the sensors 10 are detecting the presence of webs (long sheet of paper) 3, the paper feeding mechanism including the paper feeding rolls is normally operated. When the sensor 10 detects the absence of the web 3, the signal of the detector is sent to a control circuit to stop the operation of the paper supplying mechanism and indicate the replenishment of paper to users of the copying machine. Thus, the mechanism can be securely stopped to prevent the sheets of paper from jamming.

Description

[Detailed description of the invention] The present invention relates to a roll paper feeding control device KWA for a copying machine.

・The 91st copying machine that uses roll paper and feeds the long paper into a cutter via a paper feed lug to cut the long paper into a predetermined length is a microfilm copying machine. - Well known. Conventionally, in a copying machine 1a using roll paper, when the paper supply runs out, the operation of the paper supply mechanism is stopped and a paper replenishment display is performed. To check when the paper feed runs out, we use the fact that adhesive tape is installed between the core and the end of the paper, and when the adhesive tape pulls up the core using the force of the A switch is provided, and the paper feed end is detected based on a signal from the switch.

Conventional roll paper has a strong adhesive tape that is sufficient to energize the switch, but currently there is roll paper with narrow adhesive tape and weak adhesive strength. Since it is not possible to pull up the core, it is not possible to detect when the paper feed has run out, and therefore the paper feed mechanism does not stop feeding the paper and continues to feed the paper, resulting in copy paper of inappropriate dimensions. Unfortunately, there is adhesive tape on the edge of the paper, sand that has caused a paper jam in the paper feed area, and sticky tape on the paper feed path. . Furthermore, since long sheets of paper may remain in the paper feed area, the removal process is 1M! It was time consuming and troublesome.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a paper feed control device for greeting cards that reliably detects the end of the roll paper feed and thereby eliminates the above-mentioned drawbacks.

According to the present invention, there is provided a copying machine that uses roll paper and feeds the long paper to a cutter via a paper feed roller to cut the long paper into a predetermined length. There is provided a roll paper feeding device characterized in that a sensor is provided between the roll paper and the paper feeding roller to detect the presence or absence of paper, and the paper feeding operation is controlled by a signal from the sensor. As a result, regardless of the strength of the adhesive tape's adhesion to the winding core, it is even more adhesive! It is said,
Therefore, there is no possibility of copy paper having inappropriate dimensions, jamming, or paper remaining.

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 7 shows a conventional cool paper feeding mechanism for a copying machine. The two cool papers 1.2 have different widths, and the user of the copying machine selects which one to use. #The long paper, that is, the web 8 from roll 1 (or 2) is moved toward the cutter 5 by the paper feed roller 4 and is moved to J! ! The difference between the sand feed roller number and the cutter 6 is / Sotsufuru board 6
．． 6' is provided! It constitutes the passage of the bus 8. Paper on the baffle plate 6.6' - Optical sensor for detection? ,
7' is provided to detect the width of the web 8 passing therethrough. Katsuta 5 operates in response to a control signal from the copying machine.
・Cut f8 to a predetermined length.

In the paper feed mechanism configured as described above, when it comes to the paper feed cutter 5, the tensile force of the paper feed p-ra 4 is caused by the adhesive tip f (not shown) between the end of the roll paper l and the roll 1 core 8. to lift the winding core 8. The lifted winding core 8tj is energized by the switch 9 placed there.

A signal from this switch is sent to a control circuit (not shown) to stop operation of the paper feed mechanism and to indicate to the copying machine user that paper needs to be replenished.

This paper feed out detection mechanism #i was mentioned earlier.

If the adhesive strength of the adhesive tape is weak, it will not be possible to detect paper feed shortage, resulting in various problems.

In the present invention, as shown in FIG.
Alternatively, a sensor lO for detecting the presence or absence of paper is provided between 2) and the paper feed roller b.

Therefore, switch 9 in Figure 1 can be removed! This can be done assuming the presence of adhesive tape (and that it has strong adhesive strength), and there is no need to detect when the paper feed is out. That is, in the state where the sensor RLG detects the presence of the 9 nib 8, the paper feed mechanism including the 1 paper sand feed roller is operated normally, and when the sensor IO detects the absence of the web 8, this signal is transmitted. A control circuit (not shown) is sent to stop the operation of the paper feed mechanism and to indicate to the copier user that paper needs to be replenished.

The sensor lO may be a mechanical switch, but it is preferable to use an optical sensor consisting of a combination of a light-emitting element and a light-receiving element. Easy to detect. In the case of an optical sensor, one light-emitting element and one light-receiving element may be arranged facing each other across the web path, or it may be a reflective type in which one pixel element is arranged on one side, as shown in Fig. 1. An example is a reflective optical sensor.

Before, Senna lO is the center for paper width detection in Fig. 7.
Can be used in conjunction with '17/. That is, by arranging the sensor 10 so as to detect not only the presence or absence of paper but also the width of one paper, the paper width detection sensor shown in FIG. 7 can be removed.

[K. Since the senna according to the present invention is placed above the paper feed roller, when the paper feed roller stops due to paper feed shortage, one sheet of paper is supported by the roller, and jams within the paper feed mechanism are prevented. do not have.

[Brief explanation of the drawing]

g/Figure is a schematic side view WA of a conventional roll paper feeding mechanism. FIG. 1 is a schematic side view of a roll paper feeding mechanism according to the present invention. 1.2...Raw paper, 8...Long paper (web),
4...Paper feed flora, 5...Cutter, 6.6'...
- Baffle plate, 7...Sensor for detecting paper width %8...Win core, 9...Paper feed end sensor, 10...Set for detecting presence/absence of paper. Figure 1 Figure 2

Claims (1)

[Claims] The relationship between the roll paper and the paper feed roller is such that the long paper is fed to the cutter via the paper feed roller and cut into a predetermined length in the KNatsu9 copying machine. A roll paper feeding control device, characterized in that a sensor is provided to detect the presence or absence of paper, and a paper feeding operation is controlled by a signal from the sensor.