JPH0412030Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a paper feeding cassette that is attached to the paper feeding section of a copying machine and serves both automatic paper feeding and manual feeding.

[Background of the idea]

In general, the paper feeding mechanism of a copying device stores recording papers stacked in a cassette main body having a top lid with the upper surface open in the paper feeding direction, and the leading edge of the recording paper is placed on the bottom plate of a cassette mounting section provided in the copying machine main body. The paper sheet is lifted together with the paper receiving plate by a push-up lever and brought into contact with the paper feed roller, so that the paper can be sent out toward the transfer section by the rotational force of the paper feed roller. In this case, in order to reliably feed the recording sheets one by one, many of them are provided with claws that can lightly support the leading edge of the uppermost layer of recording paper. If the top cover of such a cassette is used as a manual feeding platform and the paper is used for manual feeding, the manually fed paper will come into contact with the tab, so usually an elastic sheet is placed on the front edge of the top cover to cover the tab. It is being extended.

However, since the elastic sheet is made of synthetic resin and is an electrical insulator, static electricity is generated due to friction with manually fed paper, resulting in paper feeding failure or shearing in the conveyance system.

[Purpose of invention]

This invention is intended to solve the above problem, and aims to provide a paper feed cassette that can be used for both manual feed and paper feed, which can reliably feed and transport sheets while preventing the generation of static electricity.

[Structure of the idea]

In order to achieve the above object, this invention has a cassette main body that has a top cover with an open upper surface in the paper feeding direction.
In a paper feed cassette for manual feeding, which is provided with a claw piece that lightly supports the leading edge of the top layer of recording paper, and in which the top cover is used as a manual feeding platform, the front edge of the top cover is provided with a conductive or mat-like material that covers the claw piece. The elastic sheet is extended to prevent static electricity from being generated during manual paper feeding.

〔Example〕

Next, the present invention will be described based on embodiments shown in the accompanying drawings.

1 to 3 show the cassette of the present invention.
In the figure, 1 is an upper lid 2 with the upper surface open in the paper feeding direction.
The cassette main body 1 has width regulating plates 3 and 4 movable in accordance with the width of the recording paper R accommodated on the bottom surface thereof, and a paper receiving plate 5 whose base end is pivoted. It is provided. This paper receiving plate 5 is connected to a push-up lever 7 disposed on the bottom plate of the cassette mounting section 6 of the copying machine as shown in the fourth figure.
This is to enable the recording paper R to come into contact with the paper feed roller 8. 9,10
are claw pieces for lightly supporting both sides of the front edge of the recording paper R in the cassette main body 1, and the base ends 9a and 10a of the claw pieces 9 and 10 are pivoted to the width regulating plates 3 and 4, respectively. has been done. The claw pieces 9 and 10 are provided to ensure that one sheet can be separated from the other when the sheet is fed out due to the friction caused by the rotation of the sheet feeding roller 8. Reference numeral 11 denotes a movable base provided on the upper surface of the upper lid 2, and the movable base 11 is used for manually feeding paper.
This is to regulate one side edge of R' and to determine the manual feed position according to the paper size. 12,1
Reference numeral 3 denotes an elastic sheet extending on the lower surface of the front edge of the upper lid 2 on both sides, and the elastic sheets 12 and 13 are used to cover and cover the paper sheet R' so that it does not hit the claws 9 and 10 during manual feeding. belongs to. The space between the elastic sheets 12 and 13 is sufficiently opened so that the paper feed roller 8 can come into contact with the recording paper R during automatic paper feeding. width regulating plate 3, which is adjusted according to the size of the recording paper accommodated in 1;
Even if it moves according to 4, it has the necessary width to cover the movement area.

Further, the elastic sheets 12 and 13 are made of a material that does not generate static electricity due to friction with paper when manually feeding the paper. For example, a conductive material is added to synthetic resin as a filler and rolled in a certain direction to make it conductive, or the surface is treated with Ebons so that it can make point contact with manual paper. It is formed.

The rear end of the upper lid 2 is connected to the cassette body 1 via a hinge means 14, so that it can be unfolded as shown in the third figure. This is to make it easier to replace the recording paper.

The paper feed roller 8 has a half-moon shape with a part of its circumference cut out, and before yarn feeding starts, the circular part 8a faces upward and the notch part 8b faces downward, and is lifted by the push-up lever 6 as described above. A passage W for the manual paper R' can be formed between the recording paper R and the manual paper R' in front of the passage W.
A shutter 14 is provided for regulating the tip of R'. This shutter 14 blocks the passage W when the paper feed roller 8 is inactive, and
starts rotating, and before the tip of the circular portion 8a in the rotating direction comes into contact with the manual paper R' and starts feeding, it is lifted up by the action of the cam 15 and can be retracted above the path W. There is.

[Effect of idea]

As described above, this invention has a cassette main body that has a top cover with its upper surface open in the paper feeding direction, and a claw piece that lightly supports the front edge of the top layer of recording paper, and a manual feeder that uses the top cover as a manual feeder. The dual-purpose paper feed cassette is characterized in that a conductive or mat-like elastic sheet is extended on the front edge of the top cover to cover the claws, so that when manually feeding paper, the paper does not get in the way of the claws in the cassette. In addition, the conductive or mat-like elastic sheet does not generate static electricity due to friction with manual paper, so the paper does not become unfeedable due to static electricity. This provides an excellent effect in that the paper can be fed reliably at all times without curling or jamming during the conveyance system.

[Brief explanation of drawings]

The figures show an embodiment of this invention; Fig. 1 is a perspective view of the cassette body, Fig. 2 is a sectional view with the top cover slightly opened, Fig. 3 is a perspective view when replacing recording paper, and Fig. 4 is a copying machine. FIG. 1...Cassette body, 2...Top lid, 3, 4...
Width regulating plate, 5... Paper receiving plate, 9, 10... Claw body, 12, 13... Elastic sheet.

Claims (1)

[Claims for Utility Model Registration] (1) A claw piece for lightly supporting the leading edge of the uppermost layer of recording paper is provided in the cassette body having a top cover with the upper surface open in the paper feeding direction, and the top cover is attached to a manual feed stand. What is claimed is: 1. A sheet feeding cassette for manual feeding, characterized in that a conductive or mat-like elastic sheet is extended on the front edge of the upper lid to cover the claw piece. (2) The paper feed cassette for manual feeding according to claim 1, wherein the elastic sheet has a width that covers a movement area of the claw piece that moves depending on the size of the recording paper.