JPH0428629A - Paper sheet feeder cassette - Google Patents

Abstract

PURPOSE:To prevent deflection of a transfer paper sheet by providing an auxiliary plate to block a cut-off to transfer a regulation piece on a paper sheet side edge end regulation piece and providing an auxiliary plate guide tool on a loading plate in a paper sheet cassette of a copying machine and others. CONSTITUTION:An auxiliary plate 14 to block a cut-off 12 is installed on a regulation piece 13 to regulate the side edge end of a transfer paper sheet by way of transferring it along the cut-off 12 provided on a loading plate 11 in accordance with the size of the transfer paper. Thereafter, a guide tool 15 locked to the auxiliary plate 14 and free to transfer to guide is divided into a plural number of points and provided on the loading plate 11. In this constitution, it is possible to prevent deflection of paper sheets due to the cut-off.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a paper feed cassette for an image forming apparatus such as a copying machine.

<Prior Art> A paper feed cassette (universal cassette) used in conventional copying machines and capable of changing the width of the cassette according to the size of the transfer paper with one side as a standard has a cassette main body 1 as shown in Fig. 4.
, an M placement plate 2 provided inside the main body for placing the transfer paper, a cutout 3 formed at the side end of the placement plate 2, and a cassette main body L on the side of the cutout 3 of the main body 1. It is comprised of a side edge regulating piece 4 which is provided movably in the width direction and regulates the side edge of the transfer paper. A guide rule 5 for guiding the regulating piece 4 is provided on the lower side of the mounting plate 2.

In this paper feed cassette, it is necessary to move the side edge regulation piece 4 according to the size of the transfer paper, so the transfer paper placement plate 2
The notch 3 must be made large.

<Problem to be Solved by the Invention> In the above-mentioned prior art, if the transfer paper mounting plate 2 is cut out greatly, the strength of the transfer paper mounting plate 2 will be insufficient and twisting of the mounting plate 2 will occur. Since the placed transfer paper is tilted, the conveying force of the paper feed roller is not transmitted, which is one of the causes of paper feeding failure.

Further, if the notch 3 is large, the transfer paper will bend into the notch 3 due to its weight, causing sag on the transfer paper, which may cause white spots to occur in high humidity conditions.

Furthermore, the guide rail 5 that guides the regulating piece 4 may be damaged if the regulating piece 4 is forcibly moved.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a paper feed cassette that can prevent deflection of transfer paper without impairing the strength of the transfer paper mounting plate.

<Means for Solving the Problems> As shown in FIGS. 1 to 3, the means for solving the problems according to the present invention is as shown in FIGS. A regulating piece 13 is provided to regulate the
In a paper feed cassette in which a notch 12 is formed at the side end of the placement plate 11 for moving the regulating piece 13 according to the size of the transfer paper, an auxiliary plate 14 is provided in the regulating piece 13 to close the notch 12. is provided, and an auxiliary plate 1 is provided on the mounting plate 11.
A guide tool 15 is provided which engages with the guide member 4 and guides the guide member 4 in a movable manner.

<Operation> In the above-mentioned means for solving the problem, first, a plurality of sheets of transfer paper are placed on the mounting plate 11, and the regulating piece 13 is slid in the X direction to the side edge of the transfer paper according to the size of the transfer paper. Position the paper at a predetermined paper feeding position.

Then, in this state, the paper feed cassette main body lO is inserted into the copying machine, the copying switch of the copying machine is pressed, and the transfer paper is fed into the copying machine by rotation of the paper feeding roller.

At this time, the auxiliary plate 14 moves integrally with the regulating piece 13 according to the size of the transfer paper, and always fills the notch 12 of the mounting plate 11, so that the transfer paper can be prevented from bending. .

Therefore, it is possible to prevent the transfer paper from sagging, and it is possible to improve whitening at high humidity.

Further, the auxiliary plate 14 plays a role of improving the strength of the mounting plate 11 by covering the notch 12 of the mounting plate 11 and crawling under the mounting plate 12, and also serves to improve the strength of the mounting plate 11. By dividing and providing the holes, the cut holes can be made smaller and the strength of the mounting plate 11 is not impaired, so paper feeding mistakes due to deflection of the mounting plate 11 can be prevented.

<Examples> Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a paper feed cassette, not showing an embodiment of the present invention;
FIG. 2 is a sectional view taken along the line A-A, and FIG. 3 is a plan view thereof.

As shown in the figure, the paper feed cassette of the present invention is provided with a paper feed cassette main body 10 provided with a placement plate 11 on which a transfer paper is placed and a regulating piece 13 that regulates the side edges of the transfer paper. In a paper feed cassette in which a notch 12 for moving the regulating piece 13 according to the size of the transfer paper is formed at the side end of the writing plate II, an auxiliary plate 1 is provided in the regulating piece 13 to close the notch 12.
4 is provided, and guide tools 15 that engage with and movably guide the auxiliary plate 14 are provided (J) at a plurality of divided locations on the placement plate II.

As shown in FIG. 1, the main body 10 includes a bottom plate 17 and a bottom plate 1.
It is formed into a box shape with an open top by a front plate 18 erected on the outer circumferential surface side of 7 and side plates 19.2+ erected laterally.

The placement plate 11 is located in front of the approximate center of the main body IO,
That is, it is arranged on the front plate 18 side, and bent pieces 11a are formed at both ends of the mounting plate 11, and the bent pieces 11a are connected by pins 22 to the side plates 19, 2! are supported by each.

Then, between the mounting plate 11 and the O[j bottom plate 17, the mounting plate I! A compression spring (not shown) is interposed to urge the sheet in the direction of a paper feed roller (not shown) on the side of the copying machine main body, and the mounting plate 11 can swing vertically about the bin 22 as a fulcrum. Ru.

The cutout I2 is a U-shaped cutout on one side of the mounting plate 11.

As shown in FIG. 1.3, the side edge regulating piece 13 includes a regulating portion 13a that comes into contact with the side edge of the transfer paper to regulate its position;
This is the same as the conventional one, consisting of a base +3b that vertically supports the regulating part 13a. Regulating portion 1 of the side edge regulating piece 13
As shown in FIG. 3, a regulating claw 23 is attached to the back surface of 3a for peeling off the transfer paper one by one during paper feeding. The regulating claw 23 is a metal piece consisting of a regulating part 23a that directly contacts and regulates the transfer paper, and a mounting part 23b that attaches the regulating part 23a to the side edge regulating piece 13.

Then, by moving the side edge regulating piece I3 in accordance with the size of the transfer paper, the regulating claw 23 and the auxiliary plate 14 move integrally. In addition, 23C in the figure is the attachment part 2 of the regulation claw 23.
3b to the side edge regulating piece 13.

The auxiliary plate 14 is a flat plate that is smaller than the placement plate 11 and larger than the notch 12, and is designed to fit under the placement plate 11 and assist the placement plate 1. The side end of the auxiliary plate 14 on the notch I2 side is notched in a rectangular shape to engage and hold the regulating piece 13, and a pair of L-shaped engagement claws 25 are formed protruding from the notch 14a.

The guide tool 15 guides and holds the front and rear ends of the auxiliary plate 14 so that the auxiliary plate 14 can freely slide in the X direction in FIG. 1, and as shown in FIG. is cut and raised, and a roughly I7-shaped protrusion is formed on the lower side. and,
The guide tool 15 is attached to the mounting plate 11 at two locations along the notch 12.
They are arranged in two locations facing each other in the center.

In addition, reference numeral 26 in FIG. 3 is a regulating claw fixed to the paper feed cassette main body IO to regulate the separation of the transfer paper.

In the above configuration, the transfer paper is installed in the paper feed cassette as follows.

First, a plurality of sheets of transfer paper are placed on the placement plate 11, and the regulation piece 1
3 in the X direction to the side edge according to the size of the transfer paper to position the transfer paper at a predetermined paper feeding position.

Next, the upper end of the uppermost transfer paper is pushed under the regulating claws 23, 26.

Then, in this state, the paper feed cassette main body IO is inserted into the copy machine, the copy switch of the copy machine is pressed, and the transfer paper is fed into the copy machine by rotation of the paper feed roller.

At this time, the auxiliary plate 14 moves integrally with the regulating piece 13 according to the size of the transfer paper, and plays the role of always covering the notch 12 of the mounting plate 1, thereby preventing the transfer paper from bending. can.

Therefore, it is possible to prevent the transfer paper from sagging, and to improve the appearance of white spots at high humidity.

Further, the auxiliary plate 14 serves to improve the strength of the mounting plate 11 by inserting the notch 12 of the mounting plate II into the lower side of the mounting plate I2 from the inside.

Furthermore, by dividing the guide tool 15 into multiple locations, the cut hole can be made smaller, and the mounting plate 1
Since the strength of the stacking plate 11 is not impaired, paper feeding mistakes due to deflection of the mounting plate 11 can be prevented.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

<Effects of the Invention> As is clear from the above description, according to the present invention, the auxiliary plate is provided on the regulating piece that regulates the side edges of the transfer paper, so the auxiliary plate can be adjusted according to the size of the transfer paper. It moves integrally with the regulating piece and always closes the cutout of the placement plate, thereby preventing the transfer paper from sagging.

Therefore, it is possible to prevent the transfer paper from sagging, and it is possible to improve whitening at high humidity.

Further, the auxiliary plate can improve the strength of the mounting plate by sliding under the mounting plate without covering the notch of the mounting plate.

Furthermore, by dividing the guide into multiple locations, the cut holes can be made smaller and the strength of the mounting plate is not compromised, which helps prevent paper feeding mistakes due to bending of the mounting plate. There are some great effects that can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a paper feed cassette of a copying machine showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A, FIG. 3 is a plan view thereof, and FIG. FIG. 3 is a perspective view showing a paper feed cassette. IO: Paper cassette main body, 11: Placement plate, I2: Notch,
13 regulation piece, 14: auxiliary plate, 15: guide tool. Applicant Sharp Corporation

Claims (1)

[Claims] The paper feed cassette body is provided with a placement plate for placing the transfer paper and a regulation piece for regulating the side edge of the transfer paper, and the regulation piece is attached to the side edge of the placement plate to adjust the size of the transfer paper. In the paper feed cassette, which has a cutout for moving it according to the
The paper feed cassette is characterized in that the regulating piece is provided with an auxiliary plate that closes the notch, and the placing plate is provided with a guide that engages with the auxiliary plate and guides it movably.