JPS63286376A - Recorder - Google Patents

Abstract

PURPOSE:To eliminate the need for the directional change of an ink sheet cassette and to prevent the unsatisfactory running of an ink sheet, by a method wherein, at the completion of printing, the count value of a counter circuit is read, a pulse motor drive circuit is connected to a pules motor by actuating a change-over switch, and a pulse corresponding to the count value of the counter circuit is outputted to the pulse motor drive circuit. CONSTITUTION:A control part 300 actuates a take-up motor drive circuit 330a, thus actuating a take-up motor 210a to rotate an ink sheet roll 50, a supply side ink sheet roll 60, and a pulse motor 400, successively. The pulse motor 400 outputs a pulse at every unit-angle rotation, and a counter circuit 320 counts the pulses. After the completion of printing, the control part 300 reads the count value of the counter circuit 320 and actuates a change-over switch 340 to connect the pulse motor 400 with a pulse motor drive circuit 330. In this manner, a pulse corresponding to the count value of the counter circuit 320 is outputted to the pulse motor drive circuit 330 to reversely rotate the pulse motor 400.

Description

[Detailed Description of the Invention] [Summary] A pulse motor is attached to an ink sheet roll that supplies an ink sheet, and a pulse is transmitted every time the ink sheet roll rotates and the pulse motor rotates by a unit angle, thereby printing. During printing, the rotation angle of the ink sheet roll is determined by counting the pulses, and when printing is completed, the pulse motor is reversely rotated by outputting a pulse number proportional to the rotation angle, thereby rotating the ink sheet roll. Automatically rewinds to a position close to the point before printing starts.

[Industrial application field]

The present invention relates to a printing apparatus, and particularly to winding control of an ink sheet in a printing apparatus.

[Conventional technology]

FIG. 5 is a diagram showing an example of the configuration of a conventional thermal transfer recording device.

In the figure, 1 is a recording paper cassette, 5 is a paper feed roller, 10 is a recording paper, 20.25 is a pinch roller, 30 is a platen, 40 is a thermal head, 501.60 is an ink sheet roll, and 70 is an ink sheet. , 80 is stun power, 1
00 is an ink sheet cassette. The same symbols represent the same objects throughout the following discussion.

- As an example, the ink sheet winding control of a conventional thermal transfer recording device will be explained.

In the conventional thermal transfer recording device, when the printing state is started, the recording paper 10 in the recording cassette 1 is fed out by the paper feed roller 5, and the fed out recording paper 1O is pressed together with the ink sheet 70 into a quasi-eaves shape. The songs on the thermal head 40 and platen 30 are sent to the stacker 80 by the platen 300 rotations.

The ink sheet 70 is a base material (film) coated with a colorant such as black or red, and the colorant is transferred onto the recording paper 10 by the heat of the thermal head 40 for recording.

The ink sheet 70 is supplied from the ink sheet roll 60 and wound around the ink sheet roll 50. The ink sheet cassette 100 is an ink sheet 70 that can be used multiple times.
I'm using it a lot. Therefore, all the ink sheets 70 are wound up on the ink sheet roll 50 side, and the ink sheet roll 6
When the 0 side becomes empty, the operator pulls out the ink sheet cassette 100 from the apparatus, reverses its direction, and reloads it.

[Problem that the invention seeks to solve]

As mentioned above, in the recording device having the configuration shown in FIG.
Ink sheet roll 60 of ink sheet cassette 100
When the ink sheet cassette 100 becomes empty, the ink sheet cassette 100 must be pulled out from the apparatus, reversed, and reloaded, which is time-consuming.

In addition, since the ink sheet 70 is repeatedly reciprocated and wound up, the ink sheet 70 is disturbed, causing a problem in running of the ink sheet 70.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

The above problem is solved by interposing the ink sheet 70 and the recording paper 10 between the platen 30 and the head 40, as shown in FIG.
10a is driven by the take-up motor drive circuit 330a to run the ink sheet 70, and the head 40 drives the recording paper 1.
In a recording device that performs printing on a zero, a pulse motor 400 connected to an ink sheet roll 60 on the supply side, a counter circuit 320 that counts pulses output every time the pulse motor 400 rotates by a unit angle during printing, and a pulse motor 4
A pulse motor drive circuit 330 that outputs a pulse for 00 to reverse rotation, a changeover switch 340 that switches and connects the counter circuit 320 or the pulse motor drive circuit 330 to the pulse motor 400, and when printing, starts the take-up motor drive circuit 330a. The take-up motor 210a is operated, and when printing is completed, the count value of the counter circuit 320 is read, and the changeover switch 340 is operated to operate the pulse motor drive circuit 33.
0 to the pulse motor 400, and the counter circuit 320
The pulse motor drive circuit 33 outputs pulses corresponding to the count value of
This can be solved by providing a control section 300 that outputs the output to 0.

[Effect]

According to the present invention, during printing, the control section 300 activates the take-up motor drive circuit 330a, and thus the take-up motor 240
When a is operated, the ink sheet roll 50 is rotated, so the ink sheet roll 60 on the supply side is rotated, and the hull smoke 400 is rotated. The pulse motor 400 outputs a pulse every time it rotates by a unit angle, and the counter circuit 320 counts these pulses.

After printing is completed, the control unit 300 reads the count value of the counter circuit 320, operates the changeover switch 340 to connect the pulse motor 400 and the pulse motor drive circuit 330, and sends pulses corresponding to the count value of the counter circuit 320 to the pulse motor. It is output to the drive circuit 330 to rotate the pulse motor 400 in the reverse direction. Therefore, the ink sheet roll 60 automatically returns to approximately the position before starting printing.

〔Example〕

FIG. 2 is a diagram showing an embodiment of the present invention.

FIG. 3 is an explanatory diagram of the present invention.

FIG. 4 is an explanatory diagram of the operation of the present invention.

In the figure, 210 is a DC motor, 300 is a control unit, 310 is a comparator circuit, 320 is a counter circuit, 330 is a pulse motor drive circuit, 340 is a relay switch, and 350 is a
is a constant current power supply, and 400 is a pulse motor.

In the present invention, a DC motor 210 is used as the winding morph 210a, and a constant current power supply 350 is used as the winding motor drive circuit 350a.

(1) When recording, the control unit 300 first uses the paper feed roller 5 to load the recording paper cassette as described in the prior art section.
The recording paper 10 inside is fed out, and the fed out recording paper 10 and the ink sheet 70 are held in pressure contact between the thermal end 40 and the platen 30.

Next, the control unit 300 resets the counter circuit 320,
The relay switch 340 is operated to connect the DC motor 210 and the comparator circuit 310, and the constant current power supply 3
Start 50.

Constant current power supply 350 is activated and supplies constant current to DC motor 210, causing DC motor 210 to operate with constant torque. When the DC motor 210 rotates, the ink sheet roll 50 rotates, pulling and winding the ink sheet 70.

On the other hand, since the ink sheet 70 is pulled, the ink sheet roll 60 rotates, and the pulse motor 400 also rotates. When the pulse motor 400 rotates, it generates a back electromotive force as shown in FIG. 3(a).

This back electromotive force is applied to a comparator circuit 310, where it is converted into a pulse train as shown in FIG. 3 (bl), and counted by a counter circuit 320.

This count value is proportional to the rotation angle of the pulse motor 400, that is, the rotation angle of the ink sheet roll 60.

Let us now assume that the rotation angle per 1 pulse output by the pulse motor 400 is θ degrees, and as a result of a series of recordings, the ink sheet roll 60 has rotated by θ degrees.

At this time, the pulse motor 400 generates n=0708 pulses, the count value of the counter circuit 320 is counted and amplified, and when the ink sheet roll 60 rotates by θ degrees,
The count value is n.

(II) After completing a series of recordings, the control unit 300 stops the constant current power supply 350, reads the count value n of the counter circuit 320, and switches the relay switch 340 to set the pulse motor 400 to pulse motor drive iJJ times 1330. Connecting.

By stopping the constant current power supply 350, the DC motor 2
The current supply to 10 is cut off, the ink sheet 70 stops running, and when the ink sheet 70 stops running,
The thermal head 40, which has been held in the pressure-contact state described above, is separated from the platen 30.

Next, the control section 300 outputs a pulse to the pulse motor drive circuit 330 1- (1/N)) n times. Note that N is an arbitrary integer, and when the value of the number N is increased, the ink sheet 70 returns to the state before printing started.

Every time this pulse is received, the pulse motor 400°
is reversely rotated by θ8 degrees. Therefore, the pulse motor drive circuit 33
From 0 to (1-(1/N)) When the pulse is received n times, the pulse motor 400, that is, the ink sheet roll 60
is (1-(1/N)) - Reverse rotation by θ degrees and rewind the ink sheet 70.

Generally, the thickness of the ink sheet 70 is about 20 μm at most, and the change in the diameter of the ink sheet roll 60 when the ink sheet 70 for -page is fed is small.

For example, if a page of A4 paper is recorded when the roll diameter is 50 mm, the change in roll diameter between before and after recording is 80 μm.
It is as follows.

For this reason, if the feed amount of the ink sheet 70 during recording is L, then even if the rotation angle of the ink sheet roll 60 is controlled as in the present invention, the amount of return of the ink sheet 70 is still small.

is approximately equal to (1-(1/N)) L.

By performing the above operation, for example, every time recording of -page is completed, the ink sheet 70 is
It will be used once.

FIG. 4 (al) shows a state in which the ink sheet 70 alternately repeats forward movement and backward movement.

Further, FIG. 4(b) shows the usage state of the ink sheet 70 when N=5.

In the above description, the thermal transfer type was described, but it is not necessarily limited to the thermal transfer type.

〔Effect of the invention〕

As explained in detail above, according to the present invention, after the ink sheet cassette is once loaded into the device, there is no need to change the direction of the ink sheet cassette until it is replaced with a new ink sheet cassette. Since the reciprocating distance is small, there is less winding of the ink sheet, which has the great effect of eliminating the occurrence of poor running of the ink sheet.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 2 is a diagram showing an embodiment of the present invention. FIG. 3 is an explanatory diagram of the present invention. FIG. 4 is an explanatory diagram of the operation of the present invention. FIG. 5 is a diagram showing two configuration examples of a conventional thermal transfer recording device. In the figure, 1 is a recording paper cassette, 5 is a paper feed roller, 1O is a recording paper, 20.25 is a pinch roller, 30 is a platen, 40 is a head (thermal head), 5@, 60 are ink sheet rolls, 70 is an ink sheet, 80 is a stacker, 100 is an ink sheet cassette, 210 is a DC
Motor, 210a is a winding motor, 300 is a control unit, 31
0 is a comparator circuit, 320 is a counter circuit, 330
is a pulse motor drive circuit, 340 is a relay switch, 3
50 is a constant current power supply, 350a is a winding motor drive circuit, 4
00 is a pulse motor. Comparator B 1 output cut V Lus <b) Wood climbing @no theory 1st month 3121st (<2) A reception xms Moto Katsuaki's movement A board bait item

Claims (1)

[Claims] The ink sheet (70) and the recording paper (10) are placed on the platen (3).
A take-up motor (210a) interposed between the take-up side ink sheet roll (50) and the take-up side ink sheet roll (50) is driven by a take-up motor drive circuit (330a) to remove the ink sheet (70). ) in a recording device that prints on the recording paper (10) with the head (40), a pulse motor (400) connected to the ink sheet roll (60) on the supply side, which rotates the recording paper (10) during printing. A counter circuit (320) that counts the number of pulses output every time the pulse motor (400) rotates by a unit angle.
), a pulse motor drive circuit (330) that outputs pulses to the pulse motor (400) and causes it to rotate in reverse, the counter circuit (320), or the pulse motor drive circuit (330).
a changeover switch (340) for switching and connecting the pulse motor (400) to the pulse motor (400), and when printing, starts the take-up motor drive circuit (330a) to operate the take-up motor (210a), and when printing is finished, Read the count value of the counter circuit (320), operate the changeover switch (340) to connect the pulse motor drive circuit (330) to the pulse motor (400), and read the count value of the counter circuit (320). A recording apparatus comprising a control section (300) that outputs a corresponding number of pulses to the pulse motor drive circuit (330).