JPH0138580Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a document mounting table for a copying machine, a facsimile machine, a disk file, etc., which has a contact transparent body on which a document to be read by being irradiated with light is placed.

PRIOR ART Document mounting tables of the type described above are well known. This type of document mounting table generally has a transparent contact body made of glass, and is therefore commonly called "contact glass." However, there was a problem that glass was heavy. Therefore, not only does the weight of the entire machine increase, but it is also difficult to support the contact glass, and furthermore, in copying machines with a movable document table, the load on the drive device is also large.

In order to solve this problem, a document mounting table has been proposed in which the contact transparent body is made of a lightweight plastic material, thereby reducing the weight of the entire machine such as a copying machine.

In the document table having such a structure, since the contact transparent body is made of plastic material, the weight of the copying machine is significantly reduced and the cost is low. However, when an original is directly placed on the contact transparent body, a problem arises in that the surface is easily scratched. For this reason, it has been considered to process the surface of plastic to make it less susceptible to scratches, but such processing has problems such as being expensive.

Purpose: In view of the above-mentioned conventional problems, it is an object of the present invention to provide a document mounting table that has a simple structure and can prevent the contact transparent body itself from being scratched even if a plastic material is used for the contact transparent body. With the goal.

Configuration The configuration of the present invention will be described below based on the embodiments shown in the attached drawings.

The figure is a schematic diagram showing the upper part of a copying machine, and a document mounting table 2 is provided at the upper part of a main body 1 of the copying machine. The original table 2 has a contact transparent body 3, which is made of a plastic material that is lighter than glass. Further, below the contact transparent body 3, an optical system configured as a light source 4 that illuminates an original (not shown) and a mirror 5 that exposes a light image of the original onto a photoreceptor drum 6 is provided.

Since the contact transparent body 3 is made of plastic material, the weight of the copying machine is significantly reduced and the price is low, but if the original is placed directly on the contact transparent body 3, it is likely to be damaged. I explained earlier that there is a problem.

Therefore, in the present invention, a film 7 is provided on the contact transparent body 3. The film 7 is formed in a size that can cover the entire surface of the contact transparent body 3, and is capable of transmitting the light from the light source 4. Also, one end of this film 7 is attached to a shaft 9.
The other end of the film 7 is fixed to the other side edge of the contact transparent body 3 by a fixing member 8.

If the shaft 9 is biased in the direction of winding the film 7 by, for example, a spring, and a spring clutch or the like is provided, the film 7 can be held in a tensioned state. Moreover, if you pull out the film 7 with strong force, it can be easily unwound.
Film replacement becomes extremely easy.

In the above embodiments, the present invention was explained using a copying machine, but it is not limited to a copying machine, but can also be applied to a reading device such as a facsimile machine.

Effects The document mounting table according to the present invention is constructed as described above, and since the transparent contact body made of plastic material is covered with a film, the transparent contact body is less likely to be damaged, and the film is also easy to replace.

[Brief explanation of drawings]

The figure is an explanatory cross-sectional view showing one embodiment of the document mounting table according to the present invention. 2...Document mounting table, 3...Transparent contact body,
7...Film, 8...Fixing tool, 9...Shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] In a document mounting table of a copying machine, etc., which has a contact transparent body on which a document to be read is placed upon being irradiated with light, the contact transparent body is made of a plastic material, and the contact transparent body is made of a plastic material, and the contact transparent body is The document mounting table is characterized in that it is covered with a film through which the light can pass, one end of the film is unwoundly wound around a shaft, and the other end of the film is fixed by a fixing device.