JPS6088933A - Original platen moving device - Google Patents

Abstract

PURPOSE:To clean up easily an optical exposure part by moving an original platen to the 3rd position, and thus exposing the aperture part of an optical exposure means. CONSTITUTION:An original to be copied firstly is placed on the platen 5. The original platen 5 moves from a position A to a position B to perform exposure from the position B to a position C, and returns from the position C to the position A. Simultaneously, an optical latent image is formed on a photosensitive body (not shown in a figure) and the image is copied on transfer paper in a series of electrophotographic processes. When the optical exposure part 2 is cleaned up, the original platen is moved from the position A to a position D and the exposure part 2 is exposed. Thus, the platen 5 is moved, so the optical exposure part is cleaned easily by providing two pulleys at both side positions of the aperture part of the optical exposure part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a movable head of a document table that can be used in an electrophotographic apparatus that moves a 1ITt document table to make copies.
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The configuration of conventional examples and their problems: Copying machines in 2017 were becoming smaller and smaller.
In order to reduce the width of the sideways, many printers are moving the document table.

Hereinafter, a conventional configuration example will be explained based on FIG. 1. In Figure 11, 1 is the main body, 2 is the optical exposure section,
3 is a drive pulley, 4 is a width A7.5, and is a document table.

Next, the operation will be explained based on FIG. First, a document to be copied is placed on the document table 5. Document table 5 moves from position Δ to position B, exposes from position B to position C, and returns from position C to position 1lli3! Jru. During this time, an optical latent image is formed on the photoconductor.
A copy is made on paper by a series of electronic copying processes.

However, according to such a configuration, the optical exposure section 2
The apertures were never exposed and could not be cleaned even when dust and the like were present and prevented image formation.

OBJECTS OF THE INVENTION An object of the present invention is to provide a document table moving device that allows easy cleaning of an optical exposure section.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a document table moving device for electronic copying, which moves a document table and copies a document on the document table, the document table moving device being arranged opposite to the document table. an optical exposure means having an aperture, a drive booth and a driven pulley disposed near the opening of the optical exposure means;
A rope is passed between the two pulleys and fixed to both ends of the document table, and the document table has a first position where exposure of the document is started and a second position where exposure is ended. The document table is moved back and forth, and is further moved beyond the first or second position to a third position where the aperture of the optical exposure means is exposed. The aperture of the optical exposure means can be moved to an exposed position, and cleaning of the optical exposure section can be easily performed.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In Fig. 2, 1 is the main body, 2 is the optical exposure section, and 3 is the main body.
is the drive pulley, 4 is 1 gear, 5 is +ia 4^, 6
1 is a driven pulley, and the drive pulley 3 and the driven pulley 6 are arranged at positions IJ on both sides of the opening of the optical exposure section, and the wire 4 is fixed to, for example, one end 5a of the IIλ document table 5, 5aJ, is first wound around the driven pulley 6 located on the far side, then wound around the drive pulley 3 on the side faster than the other end 5b of the document table 5, and then connected and fixed to the other end 5b of the document table 5. be done.

J3, the driving pulley 3 and driven pulley 6 are arranged in reverse C.
There may be.

The operation of the electronic η true device of this embodiment configured as J: will be described below. , first copy ll1t
Place the paper on the document table 5''. The document table 5 moves from the position to the position B, exposes from the position B to the position C, and returns from the position C to the position C. During this time,
An optical latent image is formed on a photoreceptor (not shown) and copied onto transfer paper through a series of electronic photocopying processes. When cleaning the optical exposure section 2, the document table is moved from position A to position D and the exposure section 2 is exposed.

As described above, according to the present embodiment, two booms are provided on both sides of the opening of the optical exposure section 2 in order to move the document table, thereby realizing easy cleaning of the optical exposure section. There is.

In this embodiment, the two pulleys are located on both sides of the hole, but it goes without saying that the pulley on the h side may be located at the same position as the hole.

Effects of the Invention As is clear from the explanation, Mizumoto 1ull is configured to expose at least the aperture of the optical exposure means by moving the document table to the third position. It has the excellent effect of being easy to clean and greatly reducing the blurring of copied images due to dirt on the optical system. In addition, in conventional copying machines, the optical system had to be cleaned by a service person, but now the user can clean the optical system himself, so that the copied images can always be kept clear.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional copying machine, and FIG. 2 is a block diagram of an embodiment of the present invention. 1... Main body, 2... Optical exposure section, 3... Driving pulley, 4... Wire A7.5... Original table, 6... Driven pulley agent Yoshihiro Morimoto

Claims (1)

[Scope of Claims] 1. A document table moving device for an electrophotographic apparatus for moving a document table and copying a document on the document table, comprising: +)0 an opening facing the document table; an optical exposure means located at the right side of the document table; a drive pulley and a driven pulley disposed near the opening of the optical exposure means; The document table moves back and forth between a first position where exposure of the document is started and a second position where exposure is ended. can be moved beyond the second position to a third position where the tr8 recording hole of the optical exposure means is exposed.
This is the document table moving device.