JPH02277679A - Printer apparatus with gap varying mechanism - Google Patents

Abstract

PURPOSE:To avoid the generation of disturbance when a line is changed in spite of a thick portion such as an adhesive paste portion or stapled parts of an envelope by providing a gap motor, so that a head gap is widened in compliance with the completion of printing. CONSTITUTION:Simultaneously when printing is started, a gap motor 4 and a carrier motor 19 are actuated, so that a head gap is gradually narrowed. The speed of the carrier motor 19 is gradually increased. When the speed of the motor 19 reaches a fixed speed, printing is started at the head of a line, and at the same time the gap motor 4 is stopped. At this time, a CPU 1 is controlled so that the head gap becomes the optimum distance for printing. When printing is finished at the end of the line, the speed of the carrier motor 19 is gradually decreased, and at the same time, the gap motor 4 is actuated to widen the head gap. The gap motor 4 and carrier motor 19 are concurrently stopped at a predetermined position to change the line.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a printer device with a variable gap mechanism that can change the gap between the print head and printing paper, and eliminates line feed disturbances when printing on a thick part of the printing paper. The purpose of the present invention is to obtain a printer device with a variable gap that can easily shift color ink ribbons, and includes a print head, a CPU that causes the print head to execute printing, and a CPU that controls the printer device, and a program and data. A printer device comprising a memory means for storing the print head and a drive means for driving the print head, the gap motor being capable of changing the distance between the print paper and the print head, and the gap motor capable of changing the distance between the print paper and the print head when printing starts at the beginning of a line. and a head gap control section that controls the gap motor so that the distance between the printing paper and the print head is narrowed, and the distance between the printing paper and the print head is widened when printing at the end of the line is completed.

[Industrial application field]

The present invention relates to a printer device that can change the gap between a print head and printing paper, and in particular, a printer device with a variable gap mechanism suitable for printing envelopes or performing multicolor printing by shifting color ink ribbons. It is related to.

[Conventional technology]

A conventional example will be explained with reference to FIGS. 5 and 6. FIG. 5 is a diagram illustrating the relationship among printing position, head gap, and carrier motor speed in a conventional example;
FIG. 6 is a flowchart of a conventional printer device.

The start of the printing operation is executed by a command from the main unit (not shown) (processing step O).

At the same time, the carrier motor is activated, and the speed of the carrier motor gradually increases from the position 6 shown in FIG. 5 (processing step (2)).

It is checked whether the speed of the carrier motor has reached a predetermined constant speed (processing step 0).

Printing is started at the position 7 shown in FIG. 5 when the speed of the carrier motor reaches a constant speed (processing step 0).

The end of the line where the print head is designated, i.e. 8 as shown in Figure 5.
Printing ends when the position is reached (processing step ■).

After printing is completed, gradually reduce the speed of the carrier motor. That is, throughdown is started (processing step ■).

Then, the carrier motor stops at the position 9 shown in FIG. 5, and a line feed is started (processing step ■).

As shown in FIG. 5, the gap between the print head and the printing paper (hereinafter referred to as head gap) from carrier motor drive start 6 to carrier motor drive stop 9.
remains constant without change.

[Problem to be solved by the invention]

However, if the head gap is maintained at a constant interval, the thickness of the glued part of the envelope and the continuous stitch part will increase the load on the carrier motor when line feeds occur after printing, causing line feed errors. became. Also, when shifting the color ribbon, if the head gap is narrow, it will not be able to shift sufficiently.
There was a problem that color mixing occurred.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printer device with a variable gap mechanism that eliminates line feed disturbance when printing on a thick portion of printing paper and facilitates shifting of color ink ribbons.

[Means to solve the problem]

FIG. 1 is a diagram explaining the principle of the present invention. In the figure, the CPUI controls the drive means 3 according to a control program stored in a ROM in the memory means 2.

The driving means 3 is driven by a carrier motor 19 by the CPU 1.
LP motor (line feed motor, hereinafter referred to as
LP motor) 20 and gap motor 4 are driven.

The print head 5 can print by means of the respective motors 4, 19 and 20 mentioned above. In particular, gap motor 4
Accordingly, the print head 5 is configured such that the head gap can be varied.

[For production]

The operation based on the principle of the present invention will be explained with reference to FIGS. 1 and 2.

First, the printing operation is transmitted to the print head of the printing section by a command from the main unit (not shown), and the carrier motor 19 is activated. That is, the speed of the carrier motor 19 gradually increases from the position 6 shown in FIG. At position 7 (head of line) shown in FIG. 2, the speed of the carrier motor 19 reaches a predetermined constant speed, so printing is started.

When the designated line end, that is, the print head 5 reaches the position 8 shown in FIG. 2, printing ends. When printing is finished,
The speed of carrier motor 19 is gradually reduced. That is, after starting the through-down, the carrier motor 19 stops at the position 9 shown in FIG. 2 and starts a new line.

On the other hand, at the same time as the printing operation starts F, as shown in FIG.
At position , the gap motor 4 is started and the gap motor 4 is activated.
Drive the head in the direction of narrowing it.

The gap motor 4 is a carrier motor 19.
The head gap is set to a predetermined interval in accordance with the time when the speed reaches a constant speed, and then the head gap is stopped (position 7 shown in FIG. 2). At the same time as the print head 5 finishes printing, the gap motor 4 is activated and starts driving in the direction of spreading the print head 5 (position 8 in the second figure). When the carrier motor 19 stops (position 9 shown in FIG. 2), the gap motor 4 stops after setting the head gap to a predetermined interval.

As described above, the head gap widens when printing one line is finished, and automatically narrows to a predetermined spacing during printing, so that disturbances at line breaks or color mixing due to color ribbon shifts do not occur.

〔Example〕

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

In the figure, a main body device 12 issues execution commands to the printer device of the present invention. The main device 12 is connected to the CPUI via the interface 11, and the CPUI controls the memory means 2 and the drive means 3. Furthermore, the CPU
I has a gap motor control 1' which controls the gap motor 4 to vary the head gap to a desired spacing. The data storage RAM 13 stores print data. The program ROM 14 stores a control program for the printer device, and the print head 5, carrier motor 19, etc. are driven according to this program.

The line buffer 15 is capable of storing one line of printing. The sensor driver 16 detects the position of the printing paper in the printer device, detects that the printing paper has arrived at a predetermined location, and notifies the CPU 1 of the detection. Hammer driver 17 drives the hammer of print head 5 .

The motor driver 18 is a carrier motor 19, LF
The drive motor 20 and the gap motor 4 are controlled. The gap motor 4 is driven by a motor driver 18 and can vary the head gap. The printing unit 21 has a print head 5, and will be described as being mounted from the hammer driver 17.

The printing operation is started by a command from the main unit 120 (not shown) (processing step (2)).

At the same time, the gap motor 4 and the carrier motor 19 are activated (processing steps ① and ②). At this time,
From the position 6 shown in FIG. 2, the gap motor 4 rotates in a direction to gradually narrow the head gap. Similarly, the speed of the carrier motor 19 gradually increases.

It is checked whether the speed of the gear IJ 7/motor 19 has reached a predetermined constant speed (processing step ■).

The second time when the speed of motor 7 and motor 19 has reached a constant speed.
Printing is started at position 7 (head of line) shown in the figure (processing step ■). The rotation of the gap motor 4 is stopped in time to start printing. The head gap at this time is
The optimum printing distance and distance are controlled by the CPU.

The end of the line where the print head is designated, i.e. 8 in Figure 2
Printing ends when the position is reached (processing step ■)
.

After printing is completed, the speed of the carrier motor 19 is gradually reduced. That is, throughdown is started (processing step ■).

At the same time, the gap motor 4 is started and rotated in a direction to widen the head gap (processing step (2)). Then, the gap motor 4 and the carrier motor 19 are simultaneously stopped at the position 9 shown in FIG.

As described above, in the present invention, the head gap becomes narrow between the positions 6 and 7 shown in FIG.
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Therefore, the load on the carrier motor 19 does not increase when the print head 5 performs a new line or when the color ribbon is shifted.

〔Effect of the invention〕

According to the present invention, since the gap motor is driven to widen the head gap in accordance with the end of printing, even if the envelope has thick parts such as sections or continuous stitches, line breaks will not be disturbed. Does not occur.

Further, when the color ribbon is shifted, the head gap is wide enough to allow sufficient shifting, so color mixing does not occur.

Furthermore, since the gap motor is driven during startup and shutdown of the carrier motor, stable printing can be performed without reducing the throughput of the entire device.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention, FIG. 2 is a flowchart of an embodiment, FIG. 5 is a diagram illustrating a head gap in a conventional example, and FIG. 6 is a flowchart in a conventional example. 1...CPU 2...Memory means 3...Driving means 4...Gap motor 5...Print head 6...Carrier motor drive start 7...Print start 8...Printing End 9...Carrier motor stop Figure 1 Patent applicant: PFN Co., Ltd.

Claims (1)

[Scope of Claims] A print head 5, a CPU 1 that causes the print head 5 to execute printing and controls the printer device, a memory means 2 that stores programs and data, and a drive means that drives the print head 5. 3, a gap motor 4 capable of changing the distance between the print paper and the print head 5; and a gap motor 4 that can change the distance between the print paper and the print head 5 when printing starts at the beginning of a line; A printer device with a variable gap mechanism, comprising: a head gap control section 1' that controls the gap motor 4 so that the distance between the printing paper and the print head 5 is widened when printing is completed.