JPH0321158A - Original reader - Google Patents

Abstract

PURPOSE:To remove attraction due to static electricity generated between a glass plate and an original by discharging static electricity charged on the glass plate to a reading part through a destaticizing part to be moved in contact with the glass plate. CONSTITUTION:When an original inserted from a hopper part is set up on the glass plate 7 of a body part, the reading part 8 starts scanning. The light of a fluorescent lamp 12 projected from a slit 14 is reflected on the original through the glass plate 7, made incident again from the slit 14 and reached to the surface of a CCD 19 through respective reflectors 15 to 17 and a lens 18. A signal outputted from the CCD 19 is outputted to the external at a required timing. The read original is discharged to a stacker part through a printer part. Since a destaticizing brush 22 is contacted with the rear face of the glass plate 7 over the whole width, the brush 22 is slided on the whole surface of the glass plate 7 when the reading part 8 scans the original in the direction (B direction) rectangular to the width. Consequently, a comparatively large part of static electricity charged on the surface of the glass plate 7 can be discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry] The present invention relates to a document reading device that performs image scanning of a document, converts the result into an electrical signal, and outputs the electrical signal.

[Conventional technology]

For example, a conventional general electronic copying device has a glass plate on which the original is placed, a light source unit located below the glass plate that is movable, and a latent image formed by light reflected from the original. The image of the read document is recorded as a latent image on the charging drum and is copied onto recording paper.

[Problem to be solved by the invention]

Conventional electronic copying devices have the disadvantage that static electricity is generated on the glass plate, causing the original to stick to the glass plate.

[Failure to solve the problem]

The present invention has been made in view of the problems in conventional electronic copying devices as described in Section 2, and is particularly directed to a document reading device that converts the image of a scanned document into an electrical signal and outputs it to the outside. The purpose of this device is to prevent the original from being attracted to the glass plate on which the original is placed due to static electricity.

In order to achieve the object described in item L, the document reading device of the present invention includes a glass plate on which documents are set on two sides, a glass plate movably provided below the glass plate, In a document reading apparatus that includes a light source section that irradiates light onto the document through a light source section and a reading section that has a conversion section that converts light reflected from the document into an electrical signal, static electricity removal that comes into contact with the lower surface of the glass plate is provided. The present invention is characterized in that a member is provided in the reading section.

[For production]

Static electricity charged on the glass plate is discharged to the reading section via a static eliminating member that moves in contact with the glass plate. Therefore, the attraction between the glass plate and the document due to static electricity is eliminated.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 5.

As shown in FIG.
There is a hopper section 2 on which the documents of ``''q. It has a printer section 4 that prints and discharges the original, and a stacker section 5 on which the discharged original is placed.

Although not shown, the main body 3 has a cover that can be opened and closed and is equipped with a document transport mechanism, and a reading device 6 is provided below the cover. As can be seen from FIG. 1, which shows a state in which a part of the printer section 4 and the cover are removed, a glass plate 7 is provided on the seventh side of the reader 6, which slides relative to the cover, and serves as a surface for reading a document. A document reading section 8 is provided below the glass plate 7. This reading section 8 has one end connected to a drive belt 10 that is linked to a motor 9, and is guided by a guide (not shown) so that it can freely move along a direction B perpendicular to the document supply direction A. It is composed of

As shown in FIG. 2, the reading section 8 has a frame 11 connected to the moving belt 10 as a base. Two fluorescent lamps 12 as light sources are provided on the frame 11 in a direction perpendicular to the moving direction B of the reading section 8. Further, a mask force bar 13 is provided on the upper surface of the frame 11 facing the glass plate 7. A slit 14 is formed in this mask cover 13 at a position between the two fluorescent lights 12 and perpendicular to the direction of movement 4B of the reading section 8. As shown in FIG. 4, rectangular reflecting mirrors 15, 16, and 17 having lengths corresponding to the slit l4 are disposed at predetermined positions on the frame 11. The reflected light from the original is sequentially reflected and guided to the lens 18. A charge-coupled device 19 (hereinafter referred to as a converter) serving as a converter that converts reflected light from the original into an electrical signal is used to focus the lens 18.
It is called CCD19. ) is provided on the printed circuit board 20.

The mask cover 1 is perpendicular to the moving direction B of the reading section 8.
A slit 21 having a length corresponding to the entire width of the glass plate 7 is continuously formed on one side of the glass plate 3 over almost the entire side. A static eliminating brush 22 serving as a static eliminating member is attached to the slit 21 from below the mask cover 13, and the static eliminating brush 22 is in contact with the lower surface of the glass plate 7. As shown in FIG. 5, the static eliminating brush 22 has two
It is supported and fixed by a plate material 23 of aluminum or the like which is bent in half, and is integrated with the reading section 8 by attaching this plate material 23 to the mask cover 13 with screws or the like.

Next, the operation of the following configuration will be explained.

The original sent from the hopper section 2 is placed on the glass plate 7 of the wooden rest section 3.
When set above, the reading unit 8 starts scanning.

Then, the light from the fluorescent lamp 12 that comes out from the slit 14 is reflected by the original through the glass plate 7, and after entering the slit 14 again, it passes through each of the reflecting mirrors 15, 16, 17 and the lens 18, and reaches the CCD 19. . The signals output from the CCD 19 can be outputted to the outside at required timings as needed, and can also be stored, for example, on a magnetic tape or floppy disk. After being read, the original is discharged to the stacker section 5 via the printer section 4.

The static eliminating brush 22 contacts the entire width of the back surface of the glass plate 7, so when the reading unit 8 scans in the direction perpendicular to the width (direction B), the static eliminating brush 22 touches the entire surface of the glass plate 7. You will be treated with great care. Moreover, such a static elimination operation is repeated every time a document is read. Therefore, a considerable portion of the static electricity charged on the surface of the glass plate 7 can be removed, so that the adhesion between the glass plate 7 and the document due to static electricity is greatly improved compared to the conventional case.

Further, the configuration of this embodiment can be added to a conventional document reading device later.

〔Effect of the invention〕

According to the document reading device of the present invention, since the reading unit that scans below the glass plate is provided with the static eliminating member that comes into contact with the glass plate, it is possible to prevent the glass plate and the document from being attracted by static electricity.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing an example of the travel of the present invention, Fig. 2 is an enlarged plan view of the main part of the same embodiment, and the third cause is a left side view in Fig. 2, and Fig. 4 of the whistle. 2 is a sectional view taken along the r'/-TV cutting line in FIG. 2, and FIG. 5 is a perspective view of the static elimination brush in the same embodiment. 1... Manuscript reading device. 7...Glass plate 8.
...Reading section 12 -- Fluorescent lamp 19 as a light source section... Charge coupled device (CCD) 22 as a conversion section
...Static elimination brush as a static elimination member.

Claims (1)

[Claims] a glass plate on which an original is set; a light source section that is movably provided below the glass plate and irradiates the original with light through the glass plate; and a converter that converts light reflected from the original into an electrical signal. What is claimed is: 1. A document reading device comprising a reading section having a section, the reading section further comprising a charge eliminating member that comes into contact with a lower surface of the glass plate.