JPH0768898A - Printer device - Google Patents

Abstract

PURPOSE:To reduce the error of the stopping position to paper and realize clear outputting in print on paper having different in thickness. CONSTITUTION:The device concerned is equipped with a print head 2 arranged opposite to a platen 1 and a carriage 3, which moves the print head 2 along the platen 1 or supports it reciprocatively movably to the platen 1. To the carriage 3, a stopper 4, with which the gap between the print head 2 and the platen 1 is properly set, is installed. Further, a paper thickness detecting part 5, which abuts through paper against the above stopper 4, is arranged ahead in the moving direction, in which the carriage 3 moves towards the platen 1. The paper thickness detecting part 5 is arranged at the position projected toward the above print head 2 by the roper dimension of gap G beyond the surface, which is opposite to the printing head, of the platen 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer device,
In particular, the present invention relates to a dot impact type printer device capable of setting a print head gap to an appropriate gap even for different paper thicknesses.

[0002]

2. Description of the Related Art A conventional paper thickness automatic adjusting mechanism employs a method of moving a print head up and down or front and back to detect the paper thickness, and then moving the print head upward or backward by a print head gap. It had been.
Japanese Patent Application Laid-Open No. 1-237177 shows an example of a conventional example.
This Japanese Patent Laid-Open No. 1-237177 discloses a paper pressing unit provided with a sphere.

[0003]

However, in the above-mentioned conventional example, since the print head moves up and down as described above, an error is apt to occur at the stop position of the print head, and the head gap adjusting mechanism has a problem. If the contact area of the paper pressing part is small, the mounting position will be defective, and if foreign matter such as paper powder adheres during use, an error will occur and it will not be possible to secure a highly accurate gap, which will result in different paper thickness. As a result, there is an inconvenience that clear print output cannot be achieved.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the prior art example, particularly to reduce the error of the stop position with respect to the paper, and to achieve clear print output even for the paper of different thickness. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there are provided a print head arranged to face a platen, and a carriage for moving the print head along the platen or supporting the print head so that the print head can reciprocate. I have it.

The carriage is equipped with a stopper for appropriately setting the gap between the print head and the platen, and a paper stopper is separately provided in advance in the moving direction when the carriage moves toward the platen. A paper thickness detection unit that abuts via the sheet thickness detection unit is provided, and the paper thickness detection unit is arranged at a position protruding from the surface of the platen facing the print head toward the print head by an appropriate gap dimension G. . This aims to achieve the above-mentioned object.

[0007]

[Operation] While the print head 2 mounted on the carriage 3 is moving in the direction of the platen 1 during automatic paper thickness adjustment, the stopper 4 fixed to the carriage 3 is used.
When the sheet thickness detector 5 contacts the sheet thickness detector 5, the sheet thickness detector 5 detects the sheet thickness P and stops the movement. As a result, an appropriate print position is always secured even if the paper thickness changes.

Further, by giving a predetermined area to the shapes of the stopper and the paper thickness detecting portion, the structural dimensions allow the positional deviation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In the embodiment shown in FIG. 1, a print head 2 is disposed so as to face the platen 1, and the print head 2 is moved along the platen 1 or is supported so as to be capable of reciprocating toward the platen 1. And a carriage 3 that operates.

The carriage 3 is equipped with a stopper 4 for appropriately setting the distance between the print head 2 and the platen 1. Further, when the carriage 3 moves toward the platen 1, the stopper 4 described above is provided in the moving direction ahead.
A paper thickness detection unit 5 that comes into contact with the paper is provided. The paper thickness detecting unit 5 is arranged at a position protruding from the surface of the platen 1 facing the print head toward the print head 2 by the appropriate gap dimension G.

Here, the paper thickness detecting unit 5 is incorporated so as to be separated from the paper traveling path by a transfer mechanism (not shown) when the paper is traveling. Reference numeral 6 indicates a card holder,
Reference numeral 7 indicates an ink ribbon.

Further, in the present embodiment, the other necessary components are incorporated as they are as in the conventional printer.

When the print head 2 mounted on the carriage 3 moves in the direction of the platen 1 during the automatic paper thickness adjustment, when the stopper 4 fixed to the carriage 3 comes into contact with the paper thickness detecting portion 5. The paper thickness detection unit 5 detects the paper thickness P and stops moving. After that, the paper thickness detection unit 5 is retracted to the position indicated by the broken line in FIG. 1 so as not to hinder the paper traveling.

[0015]

Since the present invention is constructed and functions as described above, according to this, the paper thickness can be detected only by moving the print head in one direction toward the paper, and therefore, the proper printing can be performed. It is possible to provide an unprecedented excellent printer device in which the print head can be stopped at the position of the head gap, and therefore, clear print output can be performed even for sheets of different thickness.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Platen 2 Printhead 3 Carriage 4 Stopper 5 Paper Thickness Detector 6 Card Holder 7 Ink Ribbon P Paper

Claims (2)

[Claims] 1. A printer apparatus comprising: a print head arranged to face a platen; and a carriage that supports the print head so as to move along the platen or to reciprocate toward the platen. The carriage is equipped with a stopper that appropriately sets the distance between the print head and the platen, and
When the carriage moves toward the platen, a paper thickness detection unit that comes into contact with the stopper via the paper is provided at the destination in the moving direction. The paper thickness detection unit is provided on the print head from the surface facing the print head of the platen. A printer device characterized in that the printer device is arranged at a position projecting toward the front by an appropriate gap dimension. 2. The printer device according to claim 1, wherein the paper thickness detection unit is configured to be separated from the paper traveling path when the paper is traveling.