JPH032078A - Sheet suction system - Google Patents

Abstract

PURPOSE:To compose an inexpensive sheet automatically sucking method by controlling a sheet detection switch by an electronic circuit, and using a line feed switch or a page feed switch as a sheet suction switch. CONSTITUTION:A platen 1 rotated by a motor 2 is held by a frame, and a guide 3 for guiding a sheet is provided under the platen 1. The guide 3 holds a roller 4 for feeding the sheet by the rotating operation of the platen 1, and further contains a sheet detection switch 9 and a detection lever 9a. A carrier frame 7 places a printing head 5 and a sheet guide plate 8, and laterally moves in parallel with the platen 1 by guide shafts 6a, 6b secured to the frame. A sheet automatic suction switch has a function of feeding a sheet inserted to a predetermined position by operating a line feed switch or a page feed switch provided normally in a printer under determined conditions.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a paper suction method for a printer device.

[Conventional technology]

Conventionally, in order to set paper at the printing position, printer devices have either inserted the paper into a predetermined position and manually turned the platen knob to feed it out to a predetermined position 1, or provided a dedicated paper suction switch and operated it. Therefore, methods such as automatic feeding operation to a predetermined position have been adopted.

[Problem to be solved by the invention]

However, in many cases, these methods have the disadvantage that they are complicated to operate or require a dedicated suction switch, which increases costs.

[Means to solve the problem]

The automatic paper intake switch according to the present invention automatically sucks paper inserted into a predetermined position by operating one of a line feed switch and a page break switch, which are normally provided in a printer device, under predetermined conditions. It is characterized by having the function of a switch that starts the operation for feeding the paper to the printing position, that is, a paper automatic suction switch.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIGS. 1 and 2, the platen 1 has a frame (
(not shown) is maintained in a rotatable state by a motor 2, and a paper guide 3 for guiding the paper is provided below the platen 1.
A roller 4 is held for feeding out the paper by the rotational movement of the paper, and a paper detection switch 9 and a detection lever 9a are also included.

Further, a guide shaft 6a is provided to guide the carrier frame 7 on which the print head 5 and paper guide plate 8 are mounted so that it can move left and right parallel to the platen 1.

In a printer device having a structure in which both ends of the 6b are fixedly held in a frame, by taking an example of the control circuit shown in FIG. 3, existing switches such as line feed (LF) switch, page feed (FF) By using a switch or the like, it is possible to operate the switch as an automatic paper suction switch, which is different from the original purpose of the switch.

That is, when the signal a of the paper detection switch 9 once reaches the L1 level (no paper) state due to the paper sensing operation of the paper detection lever 9a, the signal A is generated as an "H" level in synchronization with this. Once this signal is set to the "H" level, it will always be in the no paper state ("H" level) regardless of the level change of the signal a of the paper detection switch 9 (the presence or absence of paper).
hold. The signal d is generated only when the signal a and the signal C are at an H level and the signal C is at an H level.

This signal d generates a signal f, which in turn generates a motor drive signal g.

Here, signal C is a signal generated when a switch provided for another purpose, such as a line feed (LF) switch or a page feed (FF) switch (not shown), is operated, and in cases other than the above conditions, The circuit configuration (
(not shown).

Furthermore, the signal S is reset to the "L" level by the delay signal e of the signal d, and is held at the "L" level until the next paper runs out. The motor drive signal g becomes a drive signal for the motor 2 to rotate the platen 1, and generates pulses within a range determined by the firmware (F/W), thereby causing the motor to be inserted between the platen 1 and the roller 4. The rotation of the platen 1 feeds out the paper by an amount determined by the firmware.

〔Effect of the invention〕

As described above, the present invention enables an inexpensive automatic paper suction method to be constructed by controlling the paper detection switch of a printer device with an electronic circuit and treating an existing operation switch as an automatic paper suction switch. .

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of essential parts of this embodiment, and FIG. 3 is a circuit diagram of a control circuit of this embodiment.
FIG. 4 is a waveform diagram thereof.

Claims (1)

[Claims] A paper suction method characterized in that by controlling a paper detection switch of a printer device with an electronic circuit, one of a line feed switch and a page feed switch is used as an automatic paper suction switch.