JPS61162430A - Copying paper sheet cassette - Google Patents

Abstract

PURPOSE:To prevent copying paper sheets from being damaged while they are prevented from abutting abut against a stopper plate which is formed at the rear edge of a loading plate, by enabling the stopper plate to be rotated rearward from its upstanding posture when copying paper sheets are supplied into a paper feed cassette. CONSTITUTION:When a cover 3 is rotated forward about pivot pins 5, 15' as fulcrums to be opened to supply new copying paper sheets in a paper feed cassette 1, the front end 16 of the cover 3 presses the forward section of a loading plate 7 overcoming the urging foces of bent plate splings 6, 6'. Then the rear end edge of the loading plate moves upward until it abuts against a stopper pin 13. A stopper plate 11 formed at the rear end of the loading plate 7 is rotated rearward about a hinge plate 10 as a fulcrum. In this condition, when new copying paper sheets are slid on and set on the loading plate 7, the copying paper sheets are fed into the paper feed cassette 1 without being made into contact with the stopper plate 11, and therefore, the paper sheets may be prevented. Further, when the cover 3 is closed, the stopper plate 11 stands up while the rear end of the copying paper sheets is made into contact with the stopper plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feed cassette installed in an image forming apparatus such as a copying machine. The present invention relates to a paper feed cassette configured to be inserted smoothly without any friction.

``Prior Art'' To copy a document using a conventional image forming device, such as a copying machine, copy paper of a size suitable for copying is stored in a paper cassette, the paper cassette containing the copy paper is loaded into the copying machine, and the copy is made. was working. Using a paper feed cassette to perform copying operations in this manner is convenient in that it saves the effort of feeding paper and prevents accidents such as paper jams in the copying machine.

The structure of such a conventional paper feed cassette will be explained according to FIG. 6. The paper feed cassette 17 has a rectangular case 18
A lid 19 that can be opened and closed is pivotally supported at one end of the case 18. The bottom plate 18a of the case $ has a pair of opposing regulating plates 20 and 20' that regulate the width of the copy paper.
is provided. The regulation plates 20 and 20' have a paper feed claw support plate 21 provided with paper feed claws 22 and 22' at the tips thereof.
, 21' are pivotally supported. Furthermore, this regulation plate 20.
A loading board 23 on which copy paper is placed is located between 20'.
Between the front edge of the loading plate 23 and the bottom plate 18a, the copy sheets loaded on the loading plate 23 are always fed by the paper feeding claws 22° 22'.
Coil spring 24゜24' for repelling the
is mediated. Further, a contact plate 25 is fixed to the bottom plate 18H on the opposite side from the paper feed claws 22, 22' for aligning the trailing edges of the copy sheets stacked on the loading plate 23.

"Problems to be Solved by the Invention" By the way, in the paper feed cassette 17 having such a structure, as shown in FIG.
When the copy paper P is inserted, one edge of the copy paper P comes into contact with the paper feed claw 22° 22' provided in the paper feed cassette 17, and the copy paper P
There is a problem in that the paper sheet P may be bent or damaged, causing damage to the copy paper P, which may hinder subsequent paper feeding operations.

Therefore, as shown in FIG. 8, there is also a method of inserting the copy paper P into the paper feed cassette 17 from the rear of the paper feed cassette 17. However, this also has the disadvantage that one edge of the copy paper P comes into contact with the folding plate 25 provided at the rear of the paper feed cassette 17, causing damage to the copy paper P.

"Means for Solving the Problems" Therefore, the present invention was made by paying attention to the problems of the conventional art as described above. In the case 2, a restraining plate 12 is provided upright on the bottom plate of the unit. At a position between the paper feed claws 5, 5' and the restraining plate 12, springs 6, 6' are installed on the lower front side of the case 2. A mounting plate 7 is provided on the rear edge thereof, and a mounting plate 7 on which a hit plate 11 is pivotally supported is provided on the rear edge thereof. By being pivotally supported, the lid 3
While the mounting plate 7 is closed, the front part of the mounting plate 7 is lifted upward by the springs 6°6', and the rear end of the mounting plate 7 is in contact with the bottom surface of the case 2. When the abutting plate 11 is supported from the rear side by the restraining plate 12 and is in an upright state, and the lid 3 is rotated forward and opened, the tip 16 of the lid 3 touches the mounting plate. By pushing down the front part of the board 7, the rear end part of the board 7 moves above the upper edge of the restraining board 12, so that the abutting board 11 rotates rearward due to its own weight. It is an object of the present invention to solve the above-mentioned problems by providing a sheet feeding cassette having the following structure.

``Example'' Hereinafter, how the configuration of the present invention is actually embodied will be explained with reference to the drawings, together with its operation.

FIG. 1 is a partially cutaway perspective view of a paper feed cassette according to an embodiment of the present invention, FIG. 2 is a plan view of the paper feed cassette shown in FIG. The paper cassette 1 has a rectangular case 2 shape. A lid 3 is pivotally supported on the upper edge of the case 2 so that it can be opened and closed, and a pair of regulating plates 4 and 4' are fixed to the bottom plate 2a of the case 2, facing each other and regulating the width of the copy paper P. has been done. Paper feed claw holding plates 4a and 4d having locking claws 5 and 5' at their tips protrude from the regulating plates 4 and 4'. Further, a loading plate 7 on which copy paper is loaded is arranged between the regulating plates 4 and 4', the front part of the loading plate 7 is located below the paper feed claw 5°5', and the rear end A contact plate 11 is formed in the part, and the contact plate 11 is in an upright state when in contact with the bottom part 2a, and the contact plate 11 is supported in the upright state from the back side by a restraining plate 12 fixed to the bottom plate 2a. At the same time, the hinge plate 10.10' (+: can be rotated backwards.

In addition, locking claws 8 (not shown) project laterally from the left and right front portions of the mounting plate 7, and the locking claws 8. The rods fit into guide grooves 9, 9' formed on the side walls of the case 2, and can move up and down within the guide grooves 9, 9'. Furthermore, a pair of bent plate springs 6 are provided between the back surface of the mounting plate 7 and the bottom plate 2a.
6' is interposed, and the front part of the board 7 is always resiliently repelled upward by the bent leaf springs 6, 6'.

A bracket 14.14' is integrally formed on the front part of the lid 3, and this bracket 14.14' is pivoted to the side wall of the case 2 with pivot pins 15, 15'. can be opened and closed using the pivot pins 15 and 15' as fulcrums. When the lid 3 is closed, the front part of the board 7 is lifted upward by the bent leaf springs 6, 6', and the rear end of the board 7 is in contact with the bottom plate 2a. Therefore, the contact plate 11
is supported from behind by the restraining plate 12 and stands upright.

When the lid 3 is moved forward and opened using the pivot pins 15 and 15' as fulcrums, the tip 16 of the lid 3 presses against the front portion of the mounting plate 7. The pressed mounting board 7 has its locking claw 8. F! moves downward in the guide grooves 9, 9', and the front part of the board 7 is pushed down, and by pushing down the front part, the rear end of the board 7 is moved to the upper edge of the restraining board 12. The abutting plate 11 then rotates rearward due to its own weight.

Next, to explain how to use the paper feed cassette 1 having the above configuration, first, FIG. Therefore, the lid 3 is closed and the front part of the board 7 is lifted upward by the bent leaf springs 6, 6', and the rear end of the board 7 is in contact with the bottom plate 2a. , per plate 1
1 is supported from the back side by a restraining plate 12 and stands upright, and the trailing edge of the copy paper P comes into contact with the upright abutment plate 11 and is aligned. When the copy paper P is fed and there is no more copy paper P in the paper feed cassette 1, the front part of the mounting plate 7 is is pushed upward and comes into contact with the locking pawl 5°5'.

When there is no copy paper P in the paper feed cassette 1 as described above, new copy paper is supplied.
, 15' as a fulcrum and rotates forward to open the lid 3.
The tip 16 of the plate spring 6, 6' bends the front part of the board 7.
Press against the pressing force of.

When the front part of the board 7 is pressed, the locking claw 8 protrudes from the front part of the board 7. The front part of the mounting plate 7 is pushed downward 1 by moving the guide grooves 9 and 9' downward in the guide grooves 9 and 9' formed in the side wall of the case 2.

By pushing down the front part of the board 7, the rear end of the board 7 is moved downward. - move upward until it abuts the pin 13; This movement of the rear end of the mounting plate 7 causes the rear end to move above the upper edge of the restraining plate 12, and as a result, the abutting plate 11 formed on the rear edge of the mounting plate 7
also moves and rotates backward using the hinge plate 10 as a fulcrum.

If a new copy paper P is slid onto the mounting plate 7 and loaded at the stage when the abutment plate 11 has rotated backward, the copy paper P can easily be placed in the paper feed cassette 1 without coming into contact with the abutment plate 11. When the cover 3 is closed and the cover 3 is refilled, the state shown in Figure 3 will be obtained. , per plate 1
1 is in an upright state, and the rear end of the copy paper P is attached to the contact plate 11.
There is no problem with the next copying operation.

"Effects of the Present Invention" As explained above, the present invention provides a mounting plate whose front lower surface side is elastically repelled upward by a spring and whose rear edge is partially pivoted with a contact plate. Placed inside the paper cassette,
While the lid is closed, the front part of the loading plate is lifted upward by the spring, and the rear end of the loading plate is in contact with the bottom of the paper feed cassette, and the abutment plate is in contact with the bottom of the paper feed cassette. When the lid is in an upright state supported from the rear side by the restraining plate and is rotated forward and opened, the tip of the lid pushes down the front part of the mounting plate, thereby The rear end of the mounting plate moves above the upper edge of the retaining plate, and the abutting plate is configured to rotate rearward under its own weight, thereby replenishing the paper feed cassette with copy paper. When copy paper is placed on the board, the contact plate formed at the rear edge of the board rotates backward from the upright position, so the copy paper slides smoothly on the board without contacting the board. There is an advantage that the stacked copies do not come into contact with the abutment plate and are damaged, and can be easily inserted without being obstructed by the abutment plate.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway slope view of a paper feed cassette according to an embodiment of the present invention, FIG. 2 is a plan view of the paper feed cassette shown in FIG.
3 is a side sectional view of the paper feed cassette shown in FIG. 1 with copy paper stored, FIG. 4 is a side sectional view of the paper feed cassette shown in FIG. 1 with no copy paper left, and FIG. 6 is a side sectional view of the paper feed cassette in FIG. 1 with the lid open;
This figure is a perspective view of a conventional paper feed cassette, and FIGS. 7 and 8 are explanatory views of inserting copy paper into the paper feed cassette of FIG. 6. 1... Paper cassette, 2... Case, 3... Lid 5, 5'...
・Paper feed claw 6.6'...Spring, 7...
...boarding board, 9.9'...guidance), 1
1... Hitting plate, 12... Suppression plate, 13... Stroke g-pin, 14
, 14'...Bracket, 16...
The tip of the board. Applicant Sanda Kogyo Co., Ltd. Agent Patent Attorney Junya Suzuki Figure 7

Claims (1)

[Claims] The paper feed claws 5, 5' and the deterrence plate 12 are provided in the case 2, which is provided with paper feed claws 5, 5' at the front edge and a deterrent plate 12 is provided on the bottom plate at the rear. At a position between 1 and 2, the front lower surface side is springed upward by springs 6 and 6', and a mounting plate 7 on which a hit plate 11 is pivotally supported is disposed at the rear end edge. The front part of the lid 3 of the case 2 is pivotally supported by the side wall part of the case 2, so that the lid 3
While the board is closed, the front part of the board 7 is lifted upward by the springs 6 and 6', and the rear end of the board 7 is in contact with the bottom surface of the case 2. When the abutting plate 11 is supported from the rear side by the restraining plate 12 and stands up, and the lid 3 is rotated forward and opened, the tip 16 of the lid 3 By pushing down the front part of the mounting plate 7,
The paper feed cassette is configured such that the rear end portion of the mounting plate 7 moves upwardly from the upper edge of the restraining plate 12, and the abutment plate 11 rotates rearward due to its own weight.