JP2531358B2 - Printer device - Google Patents

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 printer device that records on a recording sheet using a thermal head.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional printer device. In the conventional example shown in FIG. 2, a platen 59 and pinch rollers 60 and 61 which are in contact with and driven by the platen 59,
The thermal head 52 and the ink film 54 are provided. Then, while rotating the platen 59 in the direction of the arrow R, the recording paper 51 is wound around the platen 59 by the pinch rollers 60 and 61 and brought into close contact therewith.

Next, the thermal head 52 is rotated in the direction of arrow A to be pressed against the platen 59. Further, while the platen 59 is rotated in the direction of arrow R and at the same time the ink film 54 is advanced in the direction of arrow S, heat pulses are supplied to the thermal head 52, whereby the ink is transferred to the recording paper 51 and recording is performed. . Here, the recording paper 51
On the other hand, when recording one color, the platen 59 is indicated by the arrow R.
Recording is completed by rotating only in the direction.

On the other hand, in the case of performing color recording which is a superposition of colors, after the recording of the first color is completed, the platen 59 is rotated in the direction opposite to the arrow R so that the recording paper 51 is indexed to another color. Are overlaid and recorded. As described above, in color recording, recording is performed by a method of reciprocating the recording paper once for each color.

[0005]

In the above-mentioned apparatus, since the recording paper 51 is reciprocated, the winding angle is kept close to the platen 59 and the winding length is as large as possible in order to secure the feed force. It is necessary to increase θ.

However, when the winding angle becomes large, there are problems such as a winding error due to the rigidity of the recording paper 1 and curling after recording. In particular, it is remarkable in thick paper such as postcards. On the other hand, in order to reduce the winding angle without changing the winding length, it is sufficient to increase the diameter of the platen 59. However, this causes a cost increase and at the same time causes an increase in the size of the device. there were.

[0007]

It is an object of the present invention to provide a printer device which can improve the disadvantages of the conventional example and can apply a relatively large feed force to the recording paper without increasing the diameter of the platen. That is the purpose.

[0008]

According to the present invention, a platen, a thermal head mounted opposite to the platen via an ink film, and a pinch for urging a traveling force together with the platen to a recording sheet sent toward the platen. A main roller having a relatively large diameter, which is equipped with a roller, corresponding to the thermal head, and a pair of auxiliary rollers that are installed close to the main roller and parallel to both sides of the main roller; It is composed of an endless belt wound around the main roller and the auxiliary roller,
The method is adopted. This aims to achieve the above-mentioned object.

[0009]

[Operation] The belt 6 of the platen 9 is rotationally driven by the drive of the main roller 5, and the pinch rollers 10 and 11 facing the roller 7 with the belt 6 interposed therebetween are driven. Then, the main roller 5 is rotated in the direction of the arrow R, and the recording paper 51 is wound around the platen 9 by the pinch rollers 10 and 11. The winding angle θ at this time is represented by an arc having a large radius approximated by the tangent line of the main roller 5 and the pair of auxiliary rollers 7 and 8, and the winding length is from one pinch roller 10 to the other pinch roller 10. The belt length up to the roller 11 is obtained.

Next, the thermal head 52 is rotated about the head shaft 52A in the direction of arrow A and pressed against the main roller 5, and at the same time, the ink film 54 is advanced in the direction of arrow S to supply a heat pulse. As a result, the ink is transferred to the recording paper 1 and recording is performed. After the recording is completed, the thermal head 2 is rotated in the direction opposite to the arrow A to separate the ink film 54 and the recording paper 51.

[0011]

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

The embodiment shown in FIG. 1 includes a platen 9 and
The platen 9 is provided with a thermal head 52 facing the platen 9 via an ink film 54, and the recording paper 1 fed toward the platen 9 is provided with pinch rollers 10 and 11 for urging a traveling force together with the platen 9.

The platen 9 includes a main roller 5 having a relatively large diameter, which is installed in correspondence with the thermal head 52, and a pair of auxiliary devices which are installed close to the main roller 5 and parallel to both sides of the main roller 5. The rollers 7 and 8 and the endless belt 6 wound around the main roller 5 and the auxiliary rollers 7 and 8 are provided.

The pinch rollers 10 and 11 are provided so as to correspond to the pair of auxiliary rollers 7 and 8, respectively. Further, reference numerals 12 and 13 denote film rollers for securing the route of the ink film 54.

The belt 6 of the platen 9 is rotationally driven by the drive of the main roller 5, and the pinch rollers 10 and 11 facing the roller 7 with the belt 6 interposed therebetween are driven. Then, move the main roller 5 to the arrow R
The recording paper 51 is wound around the platen 9 by the pinch rollers 10 and 11 while being rotated in the direction of. The winding angle θ at this time is represented by an arc having a large radius approximated by the tangent line of the main roller 5 and the pair of auxiliary rollers 7 and 8, and the winding length is from one pinch roller 10 to the other pinch roller 10. The belt length up to the roller 11 is obtained.

Next, the thermal head 52 is rotated about the head shaft 52A in the direction of the arrow A and pressed against the main roller 5, and at the same time, the ink film 54 is advanced in the direction of the arrow S to supply the heat pulse. As a result, the ink is transferred to the recording paper 1 and recording is performed. After the recording is completed, the thermal head 2 is rotated in the direction opposite to the arrow A to separate the ink film 54 and the recording paper 51.

Further, in the case of performing the color overprinting, the main roller 5 is rotated in the direction opposite to the arrow R, the recording paper 1 is indexed, and the same operations as those described above are performed.

In this case, the belt 6 is driven by the main roller 5 in the above embodiment, but it may be driven by the auxiliary rollers 7 and 8.

[0019]

Since the present invention is constructed and functions as described above, according to the present invention, since the recording paper is constructed to be wound around the belt which is wound around the main roller and the pair of auxiliary rollers, the diameter of the main roller is reduced. It is possible to freely select and set the wrapping angle θ and the wrapping length regardless of the size of the paper. Therefore, it is possible to add a relatively large feed force to the recording paper without increasing the diameter of the platen. Therefore, it is possible to eliminate a winding error and a curl after printing, and it is possible to provide an excellent printer device which has not been available in the past and can ensure stable running of the recording paper.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing a conventional example.

[Explanation of symbols]

 1 Recording Paper 5 Main Roller 6 Endless Belt 7, 8 Auxiliary Roller 9 Platen 10, 11 Pinch Roller 52 Thermal Head 54 Ink Film θ Wrap Angle

Claims (2)

(57) [Claims] 1. A thermal transfer type comprising: a platen; a thermal head that is mounted opposite to the platen via an ink film; and a pinch roller that applies a running force to the recording paper fed toward the platen together with the platen. In the printer device described above, the platen is provided with a main roller having a relatively large diameter, which is provided corresponding to the thermal head, and a pair of auxiliary rollers provided close to the main roller and parallel to both sides of the main roller. A printer device comprising: an endless belt wound around the main roller and the auxiliary roller. 2. The printer device according to claim 1, wherein the pinch rollers are provided corresponding to the pair of auxiliary rollers, respectively.