JP2890655B2 - Automatic setting method of roll-shaped recording paper detection sensor of facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention improves the efficiency of work for determining a threshold value in a step of setting a recording paper presence / absence detection sensor and a recording paper discharge detection sensor of a facsimile machine. The present invention relates to a method for automatically setting a sensor that can be used.

[Conventional technology]

Conventionally, in a facsimile apparatus, a signal received from a transmission line is first amplified, demodulated to extract an image signal,
They are amplified to a form suitable for recording and then recorded on recording paper.

As recording methods used in facsimile apparatuses, discharge recording, energization destruction recording, energization thermosensitive recording, ink jet recording, electrostatic recording, and the like have been put to practical use. Electrostatic recording is used for high-speed recording, but thermal recording is generally used frequently.

The recording paper wound around the drum is pulled out, passed through a printing thermal head, passed through a cutter unit that cuts the recording paper, and then taken out from a discharge roller. A sensor for detecting the presence or absence of a recording sheet is provided near the thermal head, and a sensor for detecting discharge of the recording sheet is provided near the discharge roller. Here, it is assumed that a reflection type detection sensor is used in each case. In the case of electrostatic recording, after recording,
The recording paper is put into a wet developing device to form a visible image, and then discharged outside through a plurality of stages of squeezing rollers and a reversing conveyance unit.

By the way, in the production process, in order to determine the presence / absence of recording paper by the recording paper presence / absence detection sensor and to determine the completion / failure of discharge by the recording paper discharge detection sensor, respectively.
It is necessary to determine the threshold value for each sensor.

In the conventional threshold determination method, when setting the sensor in the process, after setting the recording paper between the cutters, pull out the recording paper, pull out the recording paper outside the discharge roller, then close the cover , Each sensor set was implemented.

FIG. 4 is a state layout diagram of recording paper when a conventional sensor is set.

In the conventional threshold determination method, first, as shown in FIG. 4A, the leading end of a recording paper wound around a drum, that is, a roll-shaped recording paper 41 is pulled out, and a thermal head 42 and a platen roller 44 are pulled out. , And between the discharge rollers 47 to be drawn out. Then, the recording paper presence / absence detection sensor 43 and the recording paper discharge detection sensor 46
Has been arranged. (B) shows a state in which the recording paper is automatically fed before the sensors 43 and 46 are set.

FIG. 4A shows the state of the recording paper when the sensors 43 and 46 are set. As is clear from this,
Due to variations when pulling out the recording paper, each sensor 4
There was variation in the distance between 3,46 and the recording paper. In addition, since the recording paper is different from a normal recording state by pulling out the recording paper in advance, the recording paper is not in a stretched state but in a loose state. As a result, the thresholds of the sensors 43 and 46 could not be accurately determined.

As for the recording paper conveyance of the facsimile machine, for example, see “Ricoh Technical Report No.1 March 1979” p.
p.59-66.

[Problems to be Solved by the Invention] As described above, when the conventional sensor is set, after the recording paper is set between the cutters, the recording paper is pulled out, and further, the recording paper is drawn out of the discharge roller, and then the facsimile is The cover of the device was closed and the sensor was set. As a result, there is a problem that it takes a long time in the process, and a variation in work occurs because the recording paper is pulled out, resulting in poor production efficiency.

An object of the present invention is to solve such a conventional problem, and when setting a sensor, it is not necessary to pull out a recording sheet outside a discharge roller, and an appropriate threshold value of the sensor can be determined. Another object of the present invention is to provide a method for automatically setting a facsimile machine capable of improving production efficiency.

[Means for solving the problem]

In order to achieve the above object, a method for automatically setting a roll-shaped recording paper detection sensor of a facsimile apparatus according to the present invention includes the steps of: starting a sensor set from an operation port to start setting a threshold value of a sensor; Rotating the roller to convey the roll-shaped recording paper; determining whether the roll-shaped recording paper has moved a distance reaching a second sensor (recording paper discharge detection sensor); Stopping the rotation of the motor after the paper travels a distance that reaches the second sensor, and waiting for the roll-shaped recording paper; and waiting for the roll-shaped recording paper, the first sensor (recording paper presence / absence). Detecting each output of the detection sensor) and the second sensor, and calculating a threshold value of each sensor. And it features.

[Action]

In the present invention, when determining the threshold values of the recording paper presence / absence detection sensor and the recording paper discharge detection sensor, the motor is automatically rotated to convey the roll-shaped recording paper, and then the output of each sensor is determined. To determine the threshold value. Therefore, it is not necessary to pull out the roll-shaped recording paper out of the discharge roller as in the related art, and the production efficiency is improved. In addition, since the recording paper is determined in the same state as when normal printing is performed, the recording paper is in tension, and as a result, an appropriate threshold value can be determined.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a functional block diagram of a facsimile apparatus to which the present invention is applied.

A common bus 17 in the facsimile apparatus has a CPU 11 for controlling the entire facsimile apparatus and a RAM 12 for providing a work area.
And R which stores the program to be executed by CPU11
OM13 is connected. Further, a plotter driver 14 and a motor 15 driven by the driver 14 are installed, and various sensors 16 are connected. These sensors 16 include a recording paper presence / absence detection sensor and a recording paper discharge detection sensor.

The facsimile apparatus is provided with a network control unit (NCU), a modem, a data compression / reproduction apparatus, a scanner, a plotter, and the like in addition to the above.

FIG. 1 is an arrangement diagram when a sensor is set, showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a recording paper wound in a roll shape;
Is a thermal head, 3 is a recording paper presence / absence detection sensor, 4 is a platen roller, 5 is a cutter unit, 6 is a recording paper discharge detection sensor, 7 is a discharge roller, and 8 is a recording paper position during standby.

In the present invention, each threshold based on the output of each sensor 3 and 6 is used in order to perform each determination of the presence or absence of the recording paper by the recording paper presence / absence detection sensor 3 and the completion / failure of the discharge by the recording paper discharge detection sensor 6. The hold value is determined. Since the outputs of the sensors 3 and 6 have individual variations, the threshold value is determined based on the outputs of the sensors 3 and 6 for each machine.

How to determine the threshold value (a) First, open the cover of the facsimile machine, set the leading end of the recording paper between the cutter unit 5,
Close the cover.

(B) Next, the sensor set is activated by an operation from the operator port.

(B-i) The motor is automatically rotated to convey the recording paper 1 to the discharge side by a distance A.

(B-ii) As a result, since the recording paper 1 is pulled by the discharge roller 7 and the platen roller 4, the recording paper 1 is in the same state as a normal printing state.

(B-iii) The outputs of the recording paper presence / absence detection sensor 3 and the recording paper discharge detection sensor 6 are fetched, a threshold value is calculated based on these values, and stored in the RAM 13.

FIG. 3 is an operation flowchart of the sensor set showing one embodiment of the present invention.

The flow indicated by the broken line is a conventional operation flow. Conventionally, the threshold is calculated by triggering a sensor set (step 301) to capture the output of each sensor (step 304).

On the other hand, in the present embodiment, by triggering the sensor set (step 301), the motor rotates forward (step 302) and automatically determines whether or not the sheet has been transported by the distance A (step 301). 303), the output of each sensor is taken in, and the threshold is calculated (step 304).

As described above, in this embodiment, the motor is automatically rotated to convey the recording paper, and after the recording paper is made to stand by, the sensor output is taken in and the threshold value is calculated. This saves time and improves production efficiency. In addition, since the recording paper is conveyed by rotating the motor, the recording paper is pulled in exactly the same tension as in the normal printing state, and there is no looseness or bending, and no variation occurs.

〔The invention's effect〕

As described above, according to the present invention, since the recording paper is conveyed by automatically rotating the motor, there is no need to pull the recording paper out of the discharge rollers, and the production efficiency is improved. In addition, since the output of the sensor can be taken in the same state as when the recording paper is in normal printing, it is possible to calculate an appropriate threshold value.

[Brief description of the drawings]

FIG. 1 is a layout diagram when a sensor is set according to an embodiment of the present invention, FIG. 2 is an internal configuration diagram of a facsimile apparatus to which the present invention is applied, and FIG. FIG. 4 is a flow chart of the setting operation, and FIG. 4 is a state diagram of recording paper when a conventional sensor is set. 1: recording paper, 2: thermal head, 3: recording paper presence / absence detection sensor, 4: platen roller, 5: cutter unit, 6: recording paper discharge detection sensor, 7: discharge roller, 8: standby position of recording paper , 11: CPU, 12: RAM, 13: ROM, 14: driver, 15: motor, 16: sensor, 17: common bus.

Claims (1)

(57) [Claims] 1. A production process in which a threshold value of each of a first sensor for detecting the presence or absence of a roll-shaped recording sheet immediately before a recording head and a second sensor for detecting completion of discharge of a facsimile apparatus is determined in a production process. A method for automatically setting a roll-shaped recording paper detection sensor of a facsimile apparatus, wherein the start of a sensor set from an operation port for starting the setting of the threshold value of the sensor is used as a trigger to rotate the motor. Conveying the roll-shaped recording paper; determining whether the roll-shaped recording paper has moved by a distance reaching the second sensor; and determining whether the roll-shaped recording paper has reached the second sensor. Stopping the rotation of the motor and waiting for the roll-shaped recording paper to stand by, Receiving the outputs of the first sensor and the second sensor after calculating the threshold value, and calculating a threshold value of each sensor. Automatic setting method of roll-shaped recording paper detection sensor.