JPS6216952A - Paper feed cassette - Google Patents

Abstract

PURPOSE:To surely prevent paper sheets below the topmost one, which are overlappedly fed, from being conveyed, by providing friction members adapted to be pressed against both sides of the lower side of stored paper sheets, at one end of partition plates for the stored paper sheets in a cassette. CONSTITUTION:A rotary shaft 10 provided thereto with limiting plates 11, 12 for the upper surfaces of stored paper sheets 7 are attached to paper partition plates 8, 9 for limiting both sides of the stored paper sheets 7, which are secured in a box 6. Further, there are provided paper pressing plates 13, 14 outside of the limiting plates 11, 12 to which friction members 15 are secured at one end remote from the rotary shaft 10. The upper surface of each friction member 15 is a curved surface, therefore, inclined to and made into contact with one end face of the stored paper sheets, and is pressed against the front ends of the limiting plates 11, 12 by means of a spring 16 with a predetermined force. Accordingly, paper sheets 7 below the topmost one are separated and remains in the box 6, and therefore, it is possible to prevent overlapped feed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper feeding cassette used in electrostatic transfer copying machines, printers, and the like.

BACKGROUND OF THE INVENTION Conventional paper feed cassettes of this type are shown in FIGS. 4a and 4b, for example.
It had a structure as shown in.

That is, the paper partition plates 3 and 4 that regulate both sides of the stored paper 2 are fixed in the housing 1, and the push-up plate 5 that pushes up the stored paper 2 is rotated by a rotating part 11L provided on the bottom surface of the housing 1. The paper sheet 2 is freely attached, and the paper sheet 2 is pushed upward by a push-up plate 6, and the uppermost surface of the paper sheet 2 is brought into contact with a paper feeding mechanism of a copying machine or the like to feed the paper sheet.

Problems to be Solved by the Invention However, with the above configuration, the paper feeding mechanism of copying machines and the like generally utilizes the difference in the coefficient of friction of the surfaces of the paper sheets; Therefore, even if the sheets are the same, they have different surface friction coefficients, and when feeding paper, it is necessary to feed not only the top surface of the sheet, but also the weight that feeds the sheets located r from the top surface together with the top surface. There was a problem with shipping.

In view of the above problems, the present invention provides a paper feed cassette that can prevent double feeding and feed only the topmost sheets of stored paper to a copying machine or the like.

Means for Solving the Problems In order to solve the above problems, the paper feed cassette of the present invention has the following features:
It is provided with a configuration in which both sides of the storage paper F side are pressed by friction members at one end of the storage paper partition plate.

According to the above-described structure, the present invention uses a frictional member provided at one end of the cut plate to lock the five sheets from the uppermost side of the multi-fed sheets by frictional force when the sheets are fed in duplicate. It is possible to feed only the topmost sheet of paper.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. FIG. 1 is a plan view of a paper feed cassette according to an embodiment of the present invention, and FIG. 2 is a side view thereof.

In the figure, 6 is a housing, and inside the housing 6 there is a storage paper 7.
Cut plates 8 and 9 that regulate both sides of the housing 6 are fixed to the bottom surface of the housing 6 with screws. Further, a rotating shaft 1Q is fixed to the excellent cutting plate 8.9, and paper upper surface regulating plates 11 and 12 that regulate the upper surface of the storage paper 7 are rotatably locked to this rotating shaft 10, and further, On the outside of the paper upper surface regulating plate, there are paper pressing plates 13 and 14 which are rotatably locked around the rotating shaft 10, and at the end of the paper pressing plate opposite to the rotating shaft 10, A friction body 15 made of a material with a large coefficient of friction is integrally provided. The upper surface of the friction body 15 has a curved surface, and is inclined to come into contact with the end surface of the storage paper 7. Furthermore, the corner portion 151 of the curved surface
L is fixed so as to be lower than the upper surfaces 14a, 13& of the paper pressing plates 13 and 14.

Paper top surface regulation plate 12, paper pressure plate 13, and paper top surface regulation plate 11
and the low pressure plate 14 are pulled together by springs 16, and the tip of the paper upper surface regulating plate and the friction body 1
6 is pressed with a constant pressure. In other words, the paper upper surface regulating plates 11 and 12 and the paper pressing plates 13 and 14 are provided with elongated holes 17, and the guide shafts 1 fixed to the excellent cutting plates 8 and 9 are provided with elongated holes 17.
8, and is regulated by an E-ring 19 so as to smoothly move up and down along the paper regulating surfaces of the cutting plates 8 and 9 (rotating copying operation with the rotating shaft 10 as the rotating axis). Further, an E IJ ring 19 is similarly fixed to the rotating shaft 10. The elongated hole 17 is for regulating the height of vertical movement. A push-up plate 20 is used to push the stored sheets against a paper feed mechanism of a copying machine or the like.

Next, the operation of the present invention will be explained in detail.

First, after storing the paper in the case and setting it in the paper feed section of a copying machine, etc., paper feeding is started and the five sheets of paper move together with the topmost paper, as shown in Figure 3. .

In other words, the stored paper located one page from the uppermost stored paper 7 is separated from the uppermost stored paper by the frictional force of the friction body 15 and remains in the housing 6, so that double feeding does not occur.

Furthermore, in this embodiment, when set in the paper feed section of a copying machine or the like, even if the position of the top surface of the stored paper 7 changes due to variations in the paper feeding mechanism of the copying machine, the top surface of the stored paper 7 In order to ensure that the upper surface comes into contact with the paper upper surface regulating plate 11.12 and to ensure stability of operation, the paper upper surface regulating plate 11.12 can be moved freely.

Further, when the end surface of the stored paper 7 comes into contact with the side surface 16b of the friction body 16, the friction force causes the push-up plate 2 of the stored paper
0 may not be able to push up reliably, so the upper surface 141.13& of the paper pressing plate 13.14 is
According to the present invention, as described in detail above, the paper upper surface regulating plate of the paper to be accommodated at one end of the cutting plate and the friction pressed against the paper upper surface regulating plate are located above the side surface 16b of 6. This design prevents double feeding of all types of paper, and also makes it possible to slide paper from the opposite side of the cassette to the paper feed side when replenishing the paper in the cassette, which is often handled by consumers. In addition, when loading the cassette into the paper feed section of a copying machine, etc., the uppermost side of the stored paper is restricted, so there is no chance of damage to the uppermost side of the paper, making it extremely easy to handle. Become.

In addition, because the top surface of the stored paper is regulated, even if a paper feeding mechanism such as a copying machine applies oblique force to the paper being fed, both sides of the stored paper will come off the left and right cutting plates. Therefore, the skew during paper feeding can be minimized.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a paper feed cassette according to an embodiment of the present invention, Fig. 2 is an enlarged side view of the same, Fig. 3 is an enlarged view of main parts in the same operating state, and Fig. 4 a1b is a cassette of a conventional example. FIG. 2 is a plan view and a sectional view of b...Casing, 8.9...Excellent cutting board, 11
．． 12...Paper top surface regulation plate, 13.14...
・Paper pressing plate, 15...Friction body. Name of agent: Patent attorney Toshio Nakao and one other person

Claims (3)

[Claims] (1) A casing for storing paper, and a paper regulating means provided in the casing for regulating both sides of the paper stored therein, including a paper top surface regulating means for regulating the top surface of the paper stored therein, and a paper feed. A paper pressing means having a friction member at the leading end in the direction is rotatably supported at one end by the paper regulating means, and the paper upper surface regulating means and the paper pressing means are coupled by an elastic member, A paper feed cassette, characterized in that the paper is fed out from between the paper upper surface regulating means and the friction member. (2) The paper feed cassette according to claim 1, wherein the friction member of the paper pressing means is formed with an inclined curved surface. (3) The paper feed cassette according to claim 1, further comprising a paper upper surface regulating means provided above the paper regulating means.