JPS597634A - Paper feed cassette - Google Patents

Abstract

PURPOSE:To facilitate paper supply by providing a press member freely withdrawable to the sidewall of a paper feed cassette in a xerographic copier then moving the press member by means of the fitting member of the cassette cover thereby enlarging the inner dimension of cassette wider than the paper size. CONSTITUTION:Upon opening of the cassette cover 10 for the purpose of paper supply, the stopper board 9 is drawn toward the sidewall 7 by means of a resilient member 17 to enlarge the space in the cassette wider than the paper 18 size thereby it can be inserted easily without contacting the side of paper with the stopper board 9. After insertion of paper 18 into the cassette, the cassette cover 10 is closed. Here the lower end of the fitting member 12' will fit in the upper opening between the sidewall 7 and the stopper board 9 and when further pressing the cover 10 it is fitted completely while moving the stopper board 9 against the resilient member 17. When the stopper board 9 moves, the side of paper 18 is pressed thereby the end of paper is aligned at the predetermined position in the cassette.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed force unit 71 of an electrophotographic copying machine or the like.

As shown in FIG. 1, a paper feed cassette generally has a paper separation claw 2 attached to the tip of the paper feed side of the cassette body 1, and this paper separation claw 2 separates only the topmost paper 3 or one sheet. The paper is fed in the direction of the arrow by a paper feed roller (not shown).

A horizontal position regulating plate 4 regulates the horizontal position of the paper 3, and is configured to regulate the insertion position of the paper together with a similar vertical position regulating plate 6. That is, in order to prevent the paper 3 from being fed diagonally during paper feeding, the lateral side of the paper is always moved along the lateral position regulating plate 4. Therefore, the lateral position regulating plate 4 is provided at a position that matches the size of the paper. However, when all of the paper in the paper feed cassette has been fed and a new paper is to be replenished, the lateral side of the paper comes into contact with the lateral position regulating plate 4, making it difficult to insert the paper.

Further, since the entire length of the lateral side of the paper is in contact with the lateral position regulating plate 4, resistance is generated during paper feeding, and this also has the disadvantage that smooth paper feeding is hindered.

On the other hand, a horizontal position regulating plate is provided at a dimension position that is larger than the size of the paper, and a small It is conceivable to provide a paper pressure plate of a small size to restrict only a portion of the lateral side of the paper, but this is because the small paper pressure plate is always biased in the lateral direction of the paper. When replenishing new paper, it has the disadvantage that it is difficult to insert new paper because the side of the paper contacts the paper pressing plate.

The present invention aims to provide a paper feed cassette which can eliminate the above-mentioned drawbacks.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 2 is a partially cutaway perspective view of an embodiment of the paper feed cassette according to the present invention. In the figure, 6 is the cassette body, 7
is a side wall provided inside the cassette main body 6; 8 and 8' are paper stock release claws provided at the leading end of the cassette main body 6 in the paper feeding direction; one paper stock release claw 8 is movably supported on the side wall 7; has been done. Reference numeral 9 denotes a presser plate for pressing the edge of the paper, which is similarly supported by the side wall 7.

Reference numeral 10 denotes a cassette lid, which is removably and pivotably attached to the cassette body 6, and has an auxiliary lid 11 that can be opened and closed when feeding paper and covers the cassette body 6 when not in use. are doing. 12゜12' is the cassette lid 10
A fitting member provided on the inner surface of the paper stock release claw 8 and presser plate 9.
is placed in a position corresponding to In addition, 13 is the bottom plate,
14 is an opening.

Next, the specific structure of each part and the effect of facilitating paper replenishment and accurately regulating the lateral position will be described with reference to FIGS. 3 and 4.

FIG. 3 is a sectional view of the main part when the cassette lid 10 is opened.
The holding plate 9 has a shaft 15, and an elastic member 17 such as a spring that penetrates the side wall 7 and is provided between the collar 16 of the shaft 15 and the side wall 7.
The shaft is supported so as to be biased toward the side wall. This presser plate 9 has a surface in contact with the side edge of the paper 18 that is a vertical surface (
It has a horizontal surface (a horizontal surface), and the other surface has an inclined surface that becomes thinner as it goes upward. Therefore, an opening is formed above the holding plate 9 between it and the side wall 7.

Correspondingly, the fitting member 12' provided on the inner surface of the cassette lid 1o has a surface in contact with the side wall 7 as a vertical surface (horizontal surface), and the other surface faces downward so as to coincide with the inclined surface of the presser plate 9. It becomes a wedge-shaped inclined surface that becomes thinner as it goes. Then, a notch 19 is formed so as to sandwich the shaft 16 of the presser plate 9.
is formed. Therefore, when replenishing new paper, the cassette lid 10 is first opened, and the presser plate 9I
/i Since the space inside the cassette is expanded dimensionally by the elastic member 17 toward the side wall 7,
The paper can be easily inserted and refilled without touching the side of the paper or the presser plate 9.

After inserting the paper into the cassette, the cassette lid 10 is closed as shown in FIG. At this time, the lower tip of the fitting part 12' is inserted into the space between the side wall 7 and the upper part of the holding plate 9, and when the cassette lid 1o is further pushed down, the holding plate 9 is moved to the elastic member 17.
completely insert the cassette while moving it inward against the force of the cassette. When the presser plate 9 moves inward to the cassette 7), its vertical plane (horizontal plane) presses the edge of the paper 18, that is, the side, so that the edge of the paper is neatly aligned and regulated at a predetermined position within the cassette. . Since the paper 18 is only partially pressed on its lateral sides by the presser plate 9, the paper 18 is fed smoothly without any resistance during paper feeding.

The above description has focused on the structure of the suppressing part that regulates the lateral position of the paper, the holding plate 9 and the fitting part 12' shown in FIG. It goes without saying that a configuration in which the pawl 8 is used as a suppressing member and the member member 12 alone has a similar effect, and a configuration in which both are used also has the same effect.

In addition, such a configuration allows both 1ft of cassette! A similar effect can be obtained by forming it on the I wall, but it is sufficient to provide either one on any number of walls.

As described in detail above, according to the present invention, a presser member is provided on the side wall of the cassette and can be moved in and out, and the presser member is moved in and out using a fitting member provided on the cassette lid. Therefore, when replenishing paper, the cassette lid is opened. This increases the internal dimensions of the cassette, making the space larger than the size of the paper, making it extremely easy to insert paper.

Another advantage is that when paper is inserted and the cassette lid is closed, the presser member presses the edge of the paper using the insertion part, regulating the paper in a predetermined position and preventing slanted paper feeding. You can get the same effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts of a conventional paper feed cassette, and FIG. 2 is a partially cutaway perspective view of an embodiment of the paper feed cassette according to the present invention.
FIG. 3 is a sectional view of a main part of the same embodiment when the cassette lid is open, and FIG. 4 is a sectional view of a main part of the same embodiment when the cassette lid is closed. 6...Cassette body, 7...Side wall, 8
, 8'...paper separation claw, 9...pressing plate,
10...Cassette lid, 12.12'...
- Fitting member, 16... shaft, 16... collar part, 17... elastic member, 18... paper. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 21F1- Figure 3-4

Claims (3)

[Claims] (1) A cassette body capable of storing a large number of stacked sheets of paper, and a cassette lid attached to the cassette body so that the lid can be opened and closed, and on at least one side wall of the cassette body, A pressing member that presses the edge of the paper is supported via an elastic member so that the pressing member urges the side wall of the cassette body, and the pressing member is placed on the cassette lid at a position corresponding to the pressing portion. A paper feed cassette comprising a fitting member that can be fitted between the member and a side wall of the cassette. (2) The paper feed cassette according to claim (1), wherein the pressing member that presses the edge of the paper is a paper peeling claw. (3) The paper feed cassette according to claim (1), wherein the suppressing member that presses the paper edge comprises a paper peeling claw and a press plate.