JPH0573596B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recording apparatus that performs recording using a recording head mounted on a carriage that moves along a guide shaft installed parallel to the recording surface of a recording medium.

[Prior art]

Recording devices such as printers and facsimile machines generally have a guide shaft parallel to the platen in front of the platen that backs up the paper, a carriage with a recording head mounted on the guide shaft is pivotally supported, and the carriage is moved to pick up the paper. The recording head is scanned and the recording head is driven based on a print data signal to perform recording.

Furthermore, the types of recording apparatuses are classified into thermal type, inkjet type, wire dot type, etc., depending on the recording method.

Incidentally, in the conventional recording apparatus of this type, the carriage has an integral structure and is pivotally supported by the guide shaft.

However, with such a monolithic carriage,
If a dimensional error occurs during the manufacturing process or during use after assembly, and the horizontality of the carriage moving along the guide shaft becomes inconsistent, there is a problem that it is virtually impossible to adjust or correct this. Ta.

In particular, for color printing, for example, if four types of colors (three primary colors and black) are used, four recording heads are required, and multiple recording heads are mounted on the carriage, but the horizontality of the carriage If there is even a slight error as described above, the relative position of each recording head with respect to the paper will be shifted, and when overlapping printing is performed for color printing, color shift will occur and print quality will deteriorate. The larger the printing width,
This problem is significant and requires highly accurate leveling.

It has been virtually impossible to address these problems with conventional monolithic carriages.

〔the purpose〕

An object of the present invention is to solve the problems of the prior art and to easily and accurately position a plurality of recording heads in three dimensions relative to the recording surface of a recording medium by simply adjusting the rotational position of the carriage body. To provide a recording device which is capable of adjusting the recording position between a plurality of recording heads in an extremely easy manner, and which can prevent the recording position shift between each recording head and improve the recording quality. It is to be.

[Summary]

The present invention comprises: a guide shaft provided parallel to a recording surface of a recording medium on which recording is performed by a recording means; a mounting surface parallel to the recording surface; a cylindrical protrusion projecting on the mounting surface; a bearing member rotatably supported by the guide shaft, the bearing member having a plurality of holes provided on concentric circles of the cylindrical projection; and a surface parallel to the mounting surface and rotatably fitted to the cylindrical projection. and a plurality of arcuate elongated holes provided on the concentric circumference at positions corresponding to the holes when the holes and the cylindrical protrusions are fitted together. and a fitting member that passes through the arcuate elongated hole and fits into the hole, the carriage body being rotatable relative to the bearing member in a plane parallel to the recording surface. The above object is achieved by a recording device which is characterized by being attached to.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram illustrating the main parts of a recording apparatus suitable for applying the present invention, in which a platen roller 2 (doubling as a platen and a paper feed roller) backs up paper 1 and feeds the paper in the direction of the arrow. A guide shaft 3 is installed parallel to this in front, and a carriage 4 is attached to the guide shaft in the direction of arrow P-.
It is pivotally supported so that it can reciprocate in the R direction.

On the carriage 4 is a recording head (4 in the illustrated example).
It is equipped with 5 recording heads. In the illustrated example, each recording head 5 is mounted via a head mount 6. As shown in FIG.

In this way, the recording head 5 is driven and the carriage 4 is moved to perform predetermined recording.

FIG. 2 shows the structure of the carriage 4 in FIG. 1.

In FIG. 2, the carriage 4 has a split structure, and includes a carriage body 7 on which the recording head 5 is mounted and a bearing member 8 that is pivotally supported by the guide shaft 3.
Both are fastened and fixed to each other via a mechanism that can adjust their relative levelness.

That is, a carriage body mounting surface 9 is formed on the bearing member 8, and a pin 10 with a circular cross section is fixed approximately at the center of the mounting surface, and screw holes 11 are provided at four locations around the pin. It is formed.
On the other hand, the wall 1 forming the mounting surface of the carriage body 7
2, positions (4 locations) corresponding to the center hole 13 through which the pin 10 is inserted and each of the screw holes 11;
A long hole 14 is provided. The diameters of the center hole 13 and the pin 10 are selected so that they can be rotatably fitted with desired precision, and each elongated hole 14 is formed in a partial arc shape with the center hole 13 as the center.

After fitting the pin 10 into the center hole 13, the carriage body 7 is fixedly connected to the bearing member 8 by screwing the four screws 15 into the screw holes 11 through the elongated holes 14. Ru. In this case, the four elongated holes 14 are formed on both sides of the standard set position for each screw hole 11, and the carriage body 7 can be fixed in a position rotated left and right by a predetermined angle around the pin 10. It is set as follows.

According to the carriage structure described above, the carriage main body 7 can be assembled with the relative horizontality adjusted to the bearing member 8, so even if there is a machining error of less than a certain limit on each part, the carriage body 7 can be assembled at the time of shipment etc. The carriage body 8 can be easily accurately leveled and assembled using a jig or a gauge block. Furthermore, even if the horizontality of the carriage main body 7 becomes distorted and the print quality deteriorates after many years of use, the same adjustment can be made to accurately obtain the horizontality and set each recording head 5 in the correct position. It can be fixed.

In addition, as an opposite effect to the above, since the horizontality of the carriage 4 can be achieved through adjustment, there is no need to strictly improve the machining accuracy of parts such as the carriage body 7 compared to the conventional method, which can reduce costs. You can also get

In the above explanation, the case where the horizontality of the carriage 4 is maintained has been described, but this is not necessarily absolutely horizontal, and when the standard set position is tilted, the present invention can maintain this tilted posture. The same can be applied to the case of adjusting in the reference direction.

〔effect〕

As is clear from the above description, the recording apparatus of the present invention includes: a guide shaft provided parallel to the recording surface of the recording medium on which recording is performed by the recording means; an attachment surface parallel to the recording surface; a bearing member rotatably supported by the guide shaft, the bearing member having a cylindrical projection protruding from the mounting surface and a plurality of holes provided concentrically with the cylindrical projection; and a surface parallel to the mounting surface. a hole that rotatably fits into the cylindrical projection, and a plurality of circular arc shapes provided on the concentric circumference at positions corresponding to the holes when the hole and the cylindrical projection are fitted together. a carriage body that mounts a plurality of recording heads and has a long hole; a fitting member that passes through the arcuate long hole and fits into the hole; On the other hand, since it is configured to be mounted rotatably in a plane parallel to the recording surface, the three-dimensional positioning of the carriage body relative to the recording surface can be easily performed by simply adjusting the angle of the carriage body around the cylindrical protrusion. It is possible to accurately adjust the relative positions of multiple recording heads with respect to the recording surface, and it is also possible to extremely easily adjust the recording positions between multiple recording heads. A recording apparatus is provided that can improve recording quality by eliminating recording position deviation between recording heads.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view illustrating the main parts of a recording apparatus suitable for applying the present invention, and FIG. 2 is an exploded perspective view showing a carriage according to an embodiment of the present invention. 1... Paper, 2... Platen, 3... Guide shaft, 4... Carriage, 5... Recording head, 7
... Carriage body, 8... Bearing member.

Claims (1)

[Scope of Claims] 1. A guide shaft provided parallel to a recording surface of a recording medium on which recording is performed by a recording means, a mounting surface parallel to the recording surface, and a cylindrical protrusion projecting on the mounting surface. and a plurality of holes provided on concentric circles of the cylindrical projection, a bearing member that is pivotally supported by the guide shaft, a surface parallel to the mounting surface, and a bearing member that is rotatable with respect to the cylindrical projection. a plurality of arcuate long holes provided on the concentric circumference at positions corresponding to the holes when the holes and the cylindrical protrusions are fitted; a carriage body on which a head is mounted; a fitting member that passes through the arc-shaped elongated hole and fits into the hole; A recording device characterized in that it is rotatably mounted. 2. The recording apparatus according to claim 1, wherein the cartridge main body is equipped with a plurality of recording heads for recording different colors.