JPH01310976A - Structure of flat platen - Google Patents

Abstract

PURPOSE:To perfectly eliminate a step part from the surface of a platen without controlling the depth of a rubber part mount groove and the thickness of a rubber part with high accuracy by a method wherein the rubber part having a printing pressure receiving surface is adhered and fixed to the rubber part mount groove of a rigid metal part prepared by die casting to be subjected to polishing finish simultaneously with the metal part. CONSTITUTION:A metal part 11 having a paper guide 11a and a rubber part mount groove 11b is prepared by die casting. Next, a rubber part 12 made of rubber having elasticity is mounted to the rubber part mount groove 11b of the metal part 11 to be adhered and fixed thereto by an adhesive. Thereafter, the rubber part 12 and the metal part 11 are simultaneously subjected to polishing finish to make the surface of the metal part 11 flush with the printing pressure receiving surface of the rubber part so as not to generate a step part between both surfaces. Therefore, when paper runs, it can be prevented that the end of the paper impinges against the step part to be bent and it is unnecessary to control the depth of the rubber part mount groove and the thickness of the rubber part with high accuracy and, therefore, manufacturing cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a flat platen that receives the printing pressure of a printing device. This relates to the structure of a flat platen that is supported by a rubber part.

[Prior Art] In the conventional structure of this type of flat platen, the flat platen was a metal product made by die-casting or sheet metal. Then, if necessary, a thin plate-like rubber part was bonded to the surface of the flat platen to cushion the impact. At this time, the surface of the metal part and the surface of the rubber part of the flat grating are made to be on the same surface so as not to interfere with paper running.

In order to keep the surface of the metal part of the flat platen and the surface of the rubber part on the same surface, in conventional flat grates, a rubber part mounting bowl is provided on the surface of the metal part of the flat platen, and the rubber part is mounted inside the rubber part mounting cup. Glue and fix the parts with adhesive,
On the other hand, the depth of the rubber part attachment depth and the thickness of the rubber part were controlled with high precision.

[Problems to be Solved by the Invention] In the structure of the conventional flat platen described above, the rubber part that directly receives printing pressure and the metal part that serves as a guide surface when paper is running are on the same surface. The depth of the rubber part and the thickness of the rubber part had to be controlled with high precision, but the combination of the two parts sometimes created a step on the surface.

When the paper runs, the edge of the paper hits this step and bends, which is a drawback.

Furthermore, in order to accurately control the depth of the rubber part mounting well and the thickness of the rubber part, manufacturing precision must be maintained at a high level, which has the disadvantage of increasing costs.

[Means for Solving the Problems] The present invention solves the above-mentioned conventional problems and eliminates the need to control the depth of the rubber part mounting groove and the thickness of the rubber part with high precision from the surface of the flat grating. The purpose of this invention is to provide a flat platen structure that completely eliminates steps, and in order to achieve this purpose, the flat platen of the present invention, which receives the printing pressure of the printing device, has a paper guide and a rubber part mounting groove. A rigid metal part manufactured by die-casting etc., and a rubber part of the metal part that is bonded and fixed with an adhesive in the groove, and polished at the same time as the metal part so that it is flush with the surface of the metal part. A rubber portion having a print pressure receiving surface.

[Embodiment] The structure of the flat platen of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the structure of a flat platen according to the present invention.

In the drawings, reference numeral 1 indicates an embodiment of the structure of the flat platen of the present invention, which includes a metal portion 11 and a rubber M12 that directly receives printing pressure from a printing device.

The metal part 11 is made of a rigid metal manufactured by die-casting or the like, and has a paper guide 11a for guiding the paper when the paper runs, and a long and narrow rubber part mounting groove 11b. The paper guide lla is composed of a plurality of protrusions provided apart from each other, and its surface is curved in an arc to smoothly convey the paper fed by a feed roller (not shown). .

The rubber part 12 is made of elastic rubber, and is made of the rubber part of the metal part 11. It is adhered and fixed inside 1liib with adhesive. The rubber part 12 has a print pressure receiving surface that is polished and finished at the same time as the metal part 11 so that it is flush with the surface of the metal part 11.

Next, a method for manufacturing the flat grating structure according to the present invention will be described.

First, the metal part 11 having the paper guide lla and the rubber part mounting holder 11b is manufactured by die-casting or the like.Next, the rubber part 12 made of elastic rubber is placed in the rubber part mounting groove 11b of the metal part 11. Attach and fix with adhesive. Thereafter, the rubber part 12 and the metal part 11 are polished at the same time so that the surface of the metal part 11 and the print pressure receiving surface are on the same plane, so that there is no step between the two surfaces.

[Effects of the Invention] As described above, the structure of the flat platen of the present invention includes a paper guide and a rubber part mounting hole, and a rigid metal part manufactured by die casting or the like, and a rubber part mounting groove in the metal part. The rubber part is bonded and fixed with a contact IF agent, and the rubber part has a printing pressure receiving surface that is polished at the same time as the metal part and is flush with the surface of the metal part, so it is easy to install the rubber part. It is possible to completely eliminate the level difference from the surface of the flat platen without having to control the depth and the thickness of the rubber part with high precision, and prevent the edge of the paper from hitting the level difference and bending when the paper runs. At the same time, since there is no need to control the depth of the rubber part mounting hole and the thickness of the rubber part with high precision, the manufacturing cost can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the structure of a flat platen according to the present invention. ]...Flat platen 11...Metal part 11a...Paper guides 3, 1 b...Rubber part mounting groove 12...Rubber part

Claims (1)

[Scope of Claims] In the structure of a flat platen that receives printing pressure from a printing device, a rigid metal part manufactured by die-casting or the like and having a paper guide and a rubber part mounting groove, and a rubber part mounting groove in the metal part are provided. a rubber part that is bonded and fixed to the metal part with an adhesive and has a print pressure receiving surface that is polished at the same time as the metal part and is flush with the surface of the metal part; Flat platen structure.