JP2592974B2 - Paper cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a paper feed cassette used for an electrophotographic apparatus or the like.

[Conventional technology]

Conventionally, as shown in FIG.
It comprises a cassette case 1, a plate 2 rotatably provided in the cassette case 1, and a spring 3 for pressing the paper stacked on the plate 2 against a paper feed roller.

However, in such a paper feed cassette, since the plate 2 is constantly pushed up by the spring 3, when the cassette case 1 is inserted into a cassette insertion slot of an electrophotographic apparatus or the like, the plate 2 is placed on the plate 2 due to frictional resistance with the paper feed roller. There is a problem in that the paper is greatly bent and damaged.

To solve this problem, as shown in FIG. 7, a claw 4 is provided at the tip of the plate 2 and a hook 5 which engages with the claw 4 is rotatably attached to the cassette case 1. By holding down the plate 2 with the hook 5 and inserting the cassette case 1 into the cassette insertion slot of the electrophotographic apparatus in this state, the hook 5 comes into contact with the unlocking member 6 provided in the electrophotographic apparatus, It is considered that the hook 5 and the claw 4 are disengaged from each other so that the paper on the plate 2 comes into contact with the paper feed roller.

[Problems to be solved by the invention]

However, the paper cassette as described above can prevent the paper from being damaged when the cassette case 1 is inserted into the cassette insertion slot, but the cassette case 1 is pulled out from the cassette insertion slot in a state where the paper is present on the plate 2. At this time, the paper is pulled out of the cassette case 1 due to frictional resistance with the paper feed roller, and there is a problem that the paper is wasted.

The present invention has been made in view of such problems,
Provided is a paper feed cassette in which paper is not damaged when a cassette case is inserted into a cassette insertion slot of an electrophotographic apparatus or the like, and paper is not wasted when the cassette case is pulled out from the cassette insertion slot. With the goal.

[Means for solving the problem]

The present invention provides a cassette case, a plate rotatably provided in the cassette case, and an elasticity for pressing sheets stacked on the plate against a paper feed roller rotatably supported in a cassette insertion opening. A support member provided on the cassette case; a press arm rotatably supported by the support member and pressing the plate against the bottom surface of the cassette case by elastic force against the urging force of the elastic member; When the cassette case provided on the arm is inserted into the cassette insertion slot, the projection comes into contact with the projection provided in the vicinity of the cassette insertion slot, and the press arm is rotated in a predetermined direction to release the urging force of the elastic member. Arm rotating means for bringing the paper into contact with the roller.

[Action]

In the present invention, since the plate is pressed against the bottom surface of the cassette case by the press arm when the cassette case is inserted into the cassette insertion slot, the paper on the plate is supplied when the cassette case is inserted into the cassette insertion slot. The paper does not bend significantly due to the frictional resistance of the paper roller, thereby preventing the paper from being damaged. When the cassette case is pulled out from the cassette insertion slot, the plate is pressed again to the bottom of the cassette case by the press arm. This prevents the paper from being pulled out of the cassette case and prevents waste of paper.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 are a perspective view and a sectional view, respectively, of a sheet cassette. The sheet cassette includes a cassette case 11 and a plate 12 rotatably provided in the cassette case 11.
A spring 14 (see FIG. 2) for pressing the paper 13 stacked on the plate 12 against a paper feed roller;
And a cassette cover 15 removably fitted to the opening edge of the opening 11.

On the bottom surface of the cassette case 11, a pair of support members 16 are provided.
Are erected in the width direction of the paper 13 so as to face each other. The support members 16 are erected at intervals wider than the width of the paper 13, and the paper 13 is accommodated between the support members 16.

The support member 16 is provided upright on the distal end side of the plate 12, and each support member 16 has a spring 18 as shown in FIG.
A press arm 19 for pressing the plate 12 against the bottom surface of the cassette case 11 by the elastic force of the above is rotatably mounted. At the ends of these press arms 19, an engaging portion 20 as an arm rotating means is integrally provided, and this engaging portion 20 engages with a convex portion provided at the cassette insertion slot of the electrophotographic apparatus. It is supposed to.

A paper feed guide 21 is provided on the upper surface of the cassette cover 15 so as to be slidable in the width direction of the paper 13.

Next, the operation of the sheet cassette configured as described above will be described with reference to FIGS.

FIG. 4 is a view showing a state where the cassette case 11 is inserted into the cassette insertion slot 22 of the electrophotographic apparatus. As shown in FIG.
When it is inserted into 22, the engaging portion 20 provided on the press arm 19
Engages with the protrusion 23 provided in the cassette insertion slot 22, and rotates the press arm 19 clockwise in the figure. As a result, the plate 12 pressed against the bottom of the cassette case 11
Is pushed upward by the elastic force of the spring 13 to bring the paper 13 into contact with the paper feed roller 24.

When the cassette case 11 is pulled out from the cassette insertion slot 22, the engagement between the engaging portion 20 and the convex portion 23 is released. As a result, the press arm 19 rotates counterclockwise in the figure by the elastic force of the spring 18, and again presses the plate 12 against the bottom surface of the cassette case 11, as shown in FIG.

Therefore, in this embodiment, when the cassette case 11 is inserted into the cassette insertion slot 22, the plate 12 is pressed against the bottom surface of the cassette case 11 by the press arm 19, so that the cassette case 11 is inserted into the cassette insertion slot 22. In doing so, the paper 13 on the plate 12 does not bend significantly due to the frictional resistance of the paper feed roller 24, and the breakage of the paper can be prevented.

When the cassette case 11 is pulled out from the cassette insertion slot 22, the engagement between the engagement portion 20 and the projection 23 is released, and the plate 12 is pressed again against the bottom surface of the cassette case 11 by the press arm 19, When the cassette case 11 is pulled out from the cassette insertion slot 22, the paper 13 on the plate 12 is not pulled out of the cassette case 11 due to the frictional resistance of the paper feed roller 24, so that waste of paper can be prevented.

〔The invention's effect〕

As described above, according to the present invention, the paper is not damaged when the cassette case is inserted into the cassette insertion slot of the electrophotographic apparatus, and when the cassette case is pulled out from the cassette insertion slot, the paper is removed. A paper cassette without wasting can be provided.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view of a paper feed cassette, FIG. 2 is a sectional view of the paper feed cassette, and FIG. 3 is a perspective view of a press arm. 4 and 5 are views showing the operation of the embodiment, and FIGS. 6 and 7 are views showing a conventional paper feed cassette. 11 ... cassette case, 12 ... plate, 13 ... paper, 14 ... spring, 15 ... cassette cover, 16 ... support member, 18 ... spring, 19 ... press arm, 20 ... engaging part , 21: Paper guide, 22: Cassette insertion slot, 23: Convex part, 24: Feed roller, 25: Projection part.

Claims (1)

(57) [Claims] 1. A cassette case, a plate rotatably provided in the cassette case, and sheets stacked on the plate are pressed against a paper feed roller rotatably supported in a cassette insertion opening. An elastic member, a support member provided on the cassette case, and a press rotatably supported by the support member and pressing the plate against the bottom surface of the cassette case by the elastic force against the urging force of the elastic member. Arm, when the cassette case provided in the press arm is inserted into the cassette insertion slot,
Arm rotating means for abutting on a projection provided near the cassette insertion opening, rotating the press arm in a predetermined direction to release the urging force of the elastic member, and bringing the paper into contact with the paper feed roller; A paper cassette, comprising: