JPS5953861A - Original feeding device - Google Patents

Abstract

PURPOSE:To clean up the surface of a conveyor belt uniformly and to obtain a picture of good quality even from a thin original by providing an adhesive roll in contact with the outer circumference of the conveyor belt of an original feeding device. CONSTITUTION:The conveyor belt 10 which conveys an original D over a platen 8 contacts the adhesive roll 18 on a driving roll 16. The roll 18 is pressed uniformly against the roll 16 by a spring, etc. Stains on the surface of the belt 10 are transferred to the roll 18 by its tackiness. Therefore, the surface of the belt 10 is cleaned up with the roll 18 at any time. Silicone rubber with about 5-40 deg. low rubber hardness and acrylic resin adhesive mass are used preferably as the adhesive mass of the roll 18, and they may be applied over a polyethylene film, polyvinyl chloride film, etc. The roll 18 has an elastic body 181 like sponge internally and is provided with the adhesive part 182 which uses said adhesive mass externally, and this roll 18A eliminates the need for the spring for pressing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a document feeding device used in a copying machine or the like, which uses a conveyor belt to convey a document.

゛ The document feeding device automatically or semi-automatically feeds one document from among multiple documents to the print position Kl of a copying machine, etc.
This is a device that is transported out after printing is completed.

One or more conveyor belts are used to convey the document.
The document is transported by using the frictional force between the outer peripheral surface of the transport belt and the original surface. Therefore, for the outer peripheral surface of the conveyor belt, a belt having physical properties and a surface that generates an appropriate frictional force is used.

Therefore, belts made of such materials and with a reddish surface have the disadvantage of being easily soiled. A general white belt is used as the conveyor belt, but if it gets dirty, it will turn dark. When printing, there is a conveyor belt behind the document, so
If the document is made of thin paper, dirt on the back side will appear on the copied image, reducing the quality of the copy. To avoid this, if the tail or conveyor belt becomes dirty, it is cleaned with a solvent or the like. However, this cleaning needs to be done frequently.

In addition, a separate platen cover may be provided to prevent copy quality from deteriorating due to a dirty conveyor belt. In this case, the cost increases due to the addition of additional parts.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an original document feeding device in which the conveyor belt is automatically cleaned at all times, while eliminating the above-mentioned drawbacks. This is achieved by a document feeding device characterized in that an adhesive roller is provided in contact with the outer periphery of the conveyor belt.

Detailed explanation of the present invention with reference to the drawings FIG. 1 shows the W. FIG. 7 shows an fl/7 drawing from the side of one embodiment of the document feeding device. The document D placed on the paper feed tray 1'2 is moved by the paper feed belt 2 and the stop roller 3J for preventing multi-layer feeding, which starts rotating when the copying start button (not shown) of the copying machine is operated. Through collaboration, one JM draft, which is higher than manuscript D, is sent out.

The sent out document is conveyed along guide plates 6, 7 by a pair of second paper feed rollers 4g, 4b, which have started rotating in response to a copy start operation, and a pair of conveyor rollers 5a, 5b, and is then conveyed by a conveyor belt. 10 onto the platen glass 8, and is fed {11 by the carrying force of the conveyor belt 10 until the leading edge of the document hits the document stopper 9.
Stop.

At the stop position, the original on the platen glass 8 is exposed to light by the copying machine. When the exposure is completed, the document stopper 9 moves diagonally to the lower left, and directly behind it, the conveyor belt 10 and the pair of paper ejection rollers lla, ll begin to rotate again.
b, the original is conveyed along the paper ejection guide plates 12 and 13, and the copied original is ejected onto the origami tray 15.

Here, the conveyor belt 10 is one or more end belts, and is driven by a drive roller 16 that rotates with the power tc in contact with the conveyor belt 10. Further, the tension roller 17 which is in contact with the conveyor belt 1017 m is for always applying appropriate tension to the conveyor belt 10. Belt materials include white chlorosulfonated polyethylene (for example, Depon product No. 1 Ibaron), imprene rubber (IR), acrylonitrile butadiene rubber (N
BR) etc. are used.

The adhesive roller 18 according to the present invention is attached so as to be in contact with the outer periphery of the conveyor belt 10, and in this embodiment, it is provided at the outer periphery position of the drive roller 16 portion. The adhesive roller 18 is a roller having a cross section as shown in FIG. 2 or 3. The adhesive roller 18 is provided with springs or the like at both ends, and is in contact with the drive roller 16 side with a uniform pressing force in the axial direction. When the conveyor belt 10 moves, the adhesive roller 18 also rotates, and the dirt attached to the surface of the rod conveyor belt 10 is removed by the adhesive roller xs.
It is transferred to the adhesive roller 18 due to the adhesiveness of the WM surface. Once the dirt has adhered to the circumferential surface of the adhesive opening, it will not be transferred to the adhesive belt 10. Therefore, the surface of the conveyor belt 10 is constantly cleaned by the adhesive roller 18.

The adhesive for the adhesive roller l8 is a rubber with a low hardness of approximately 5.
Suitable materials include silicone rubber and acrylic resin adhesives having a hardness of 40° to 40°, and some are coated on polyethylene film, vinyl chloride 8 film, etc. as a base.

For example, as shown in FIG. 2, the adhesive roller 18 has a sponge-like elastic body 181 inside and an adhesive part 182 using the above-mentioned adhesive on the outer periphery. When roller 18A is used, conveyor belt 10
Due to the uniform pressure contact, the entire surface of the conveyor belt 100 is cleaned uniformly. In this case, the above-mentioned pressurizing spring may be removed.

Further, the cross-sectional shape of the adhesive roller 18 may be such that, as shown in FIG. 3, an adhesive sheet 184 made of the above-mentioned adhesive is wrapped around the outer periphery of a cylindrical member 183 made of resin or the like. in this case,
As shown in FIG. 3, the rotation direction of the adhesive roller 18B,
If the winding direction of the adhesive sheet 1840 is appropriately selected, the adhesive sheet 184 will not peel off. In this case, if the adhesive sheet 184 is multi-layered and wound around the adhesive roller 18B, if the outer periphery of the adhesive roller 18B becomes dirty, the adhesive sheet 184 can be peeled off and the dirty portion can be cut off. In addition, perforations may be made in the adhesive sheet 184 at intervals that are the same as or slightly longer than the outer circumference of the adhesive roller 18B. You can bring out a new side of yourself.

The document feeding device according to the present invention described above solves the problem of contamination of the conveyor belt, which was a problem in the past, and makes it possible to obtain high-quality copied images even for documents made of thin paper.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional view of one embodiment of the document feeding device of the present invention, and FIGS. 2 and 3 both show the cross-sectional shape of an embodiment of the adhesive roller of the present invention. 1... Paper feed tray 8... Platen glass 10
...Conveyance held 16...Drive roller 17...Tensilon roller 18...Adhesive roller 181...Elastic body 182...Adhesive portion 184...Adhesive sheet agent Kuwahara ^ Mi

Claims (2)

[Claims] (1) In a document feeding device using a conveyor belt,
A document feeding device characterized in that an adhesive roller is provided so as to be in contact with the outer periphery of the conveyor belt. (2) The document feeding device according to item 1, characterized in that the adhesive portion of the adhesive roller is pre-grown with a sheet.