JPH05116772A - Paper sheet feed cassette - Google Patents

Abstract

PURPOSE:To facilitate setting of a bottom plate and to simplify assembly of a whole by forming a vertically extending guide groove in the side wall on the paper sheet take-out side of the cassette body of the paper sheet feet cassette of a duplicator and engaging a protrusion part, formed on the end part on the paper sheet take-out side of the bottom plate, therewith. CONSTITUTION:A cassette body 1 contains a number of paper sheets and the paper are taken out one by one through rotation of a take-out roller located on the device body side. The cassette body comprises a bottom plate 3 which is vertically rockably disposed in the body 1 and on which paper sheets and a push-up member, not shown, disposed on the under surface side of the bottom plate 3 and composed of a spring through the force of which the bottom plate 3 is pushed up. In this case, a vertically extending guide groove 11 is formed on the paper sheet take-out side of a side wall 8 of the cassette body 1, and a protrusion part 12 formed on the end part on the paper sheet take-out side of the bottom plate 3 is engaged therewith. Further, in this case, a position where the push-up member makes contact with the bottom plate 3 to push it up is set to a position deviated to the paper sheet take-out side from the center of gravity position of the bottom plate 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, a printer,
The present invention relates to a paper feed cassette such as a facsimile.

[0002]

2. Description of the Related Art Conventionally, as a paper feed cassette as described above,
Stores a large number of paper sheets, and sequentially takes them out with the take-out roller.
The cassette main body is configured to take out sheets one by one, and the cassette main body is provided in the main body so as to be swingable in the vertical direction and has a bottom plate for loading sheets, and a bottom plate side of the bottom plate. A push-up member that pushes up the bottom plate so as to press the take-out roller against the take-out roller is used, and the bottom plate swings around a fulcrum. The fulcrum is provided on the bottom surface of the cassette body.However, in such a case, as the bottom plate rises, the gap between the tip of the bottom plate and the cassette body becomes larger. In the case where the corner claws are provided on the side to take out the sheets one by one, the gap between the corner claws and the leading edge of the paper differs depending on the rising position of the bottom plate, and the state of the paper coming out from the corner claw becomes unstable. As a result, there is a problem in that the paper may be easily fed.

[0003]

In order to solve such a problem, there is a fulcrum of the bottom plate provided on the side surface of the cassette body to increase the height of the fulcrum. Although the gaps at the leading edge were almost uniform during the ascending and descending, the above problems could be solved, but the fulcrum of the bottom plate is outside the side guide member that regulates the side surface of the paper. However, there is a problem that the side guide member must be provided with a clearance for the bottom plate, the guide on the side surface of the paper is incomplete, and the whole assembly is extremely difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional paper feeding cassette, to stably feed the paper without causing the paper not to be fed, to completely guide the side surface of the paper, and An object of the present invention is to provide a paper feed cassette that is easy to assemble as a whole.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the invention of claim 1 stores a large number of sheets and sequentially takes out the sheets one by one by a take-out roller. A cassette main body, which is provided in the main body so as to be swingable in the vertical direction and stacks sheets, and a bottom plate which is disposed on the lower surface side of the bottom plate and is pressed against the take-out roller. In a paper feed cassette having a push-up member that pushes up the bottom plate so that the guide plate extends vertically in the side wall of the cassette body on the paper ejection side, and the guide groove is fitted to the end of the bottom plate on the paper ejection side. It is characterized in that a protrusion is formed to match with the protrusion. According to a second aspect of the present invention, in the sheet feeding cassette according to the first aspect, the position where the bottom plate of the push-up member comes into contact with and pushes up the bottom plate is deviated from the center of gravity of the bottom plate toward the paper ejection side.

[0006]

In the present invention as described above, in the first aspect of the invention, a large number of sheets are stored in the cassette body and stacked on the bottom plate, and the sheets are sequentially picked up by the take-out roller while the bottom plate is being pushed up by the push-up member. You will have to take out one by one,
At that time, the projection at the end on the paper ejection side of the bottom plate is guided by the guide groove of the cassette body, and its tip moves up and down while being parallel to the front wall of the cassette body. The gap between the tip and the corner claw is almost the same. Further, in the invention of claim 2, since the pushing-up position of the pushing-up member is deviated to the sheet take-out side from the position of the center of gravity of the bottom plate, the rear portion of the pushing-up member of the bottom plate does not descend and float by its own weight.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, reference numeral 1 denotes a cassette body, and this cassette body 1 accommodates a large number of sheets, and a take-out roller 2 takes out the sheets one by one. The main body 1 is provided in the main body so as to be vertically swingable, and has a bottom plate 3 on which sheets are stacked,
The bottom plate 3 has a push-up member 4 which is arranged on the lower surface side and which is a spring for pushing up the bottom plate 3 so as to press the sheet against the take-out roller 2. The cassette body 1 is provided with a pair of side fences 6 and an end fence 7 that regulate the left and right positions and the trailing edge position of the sheet, and a corner claw 9 that regulates the corner of the leading edge of the sheet. , According to the size of the paper loaded in the cassette body 1,
It is movable so that the position can be changed, and after the paper is set, it is lightly contacted with both side surfaces and the rear end surface to regulate the position, and the corner claw 9 takes out the paper by the take-out roller 2. In this case, the uppermost sheet is separated from the second and subsequent sheets, and is swingably provided on the side fence 6. Furthermore, the cassette body 1
A guide groove 11 extending in the up-down direction is provided on the side of the side wall 8 of the sheet for taking out the paper, and a guide groove is provided at the end of the bottom plate 3 on the side for taking the paper.
Protrusions 12 that fit into 11 are provided. And push-up member 4
As shown in FIG. 2, the position where the bottom plate 3 comes into contact with and pushes up the bottom plate 3 is deviated from the position of the center of gravity G of the bottom plate 3 toward the paper ejection side.

In the above-mentioned apparatus, a large number of sheets are stored in the cassette body 1 and stacked on the bottom plate 3, and the sheets are sequentially taken out one by one by the take-out roller 2 while the bottom plate 3 is being pushed up by the push-up member 4. At that time, the projection 12 at the end of the bottom plate 3 on the paper ejection side is guided by the guide groove 11,
The tip end moves up and down while being parallel to the front wall 5 of the cassette body 1, and the gap between the tip end of the bottom plate 3 and the corner claw 9 at the time of the highest rise and the lowest fall is substantially the same. The push-up position of the push-up member 4 is the center of gravity G of the bottom plate 3.
Since it is biased to the sheet ejection side from the position of, the rear portion of the bottom plate 3 from the push-up member 4 does not descend and float as shown by the arrow in FIG. 2 due to its own weight, and therefore the bottom plate 3 moves up and down. It is possible to set by simply dropping the bottom plate 3 into a predetermined position in the cassette body 1 without requiring a special fulcrum, a fixing means to the cassette body 1, or the like. In this embodiment, a spring is used as the push-up member 4, but the present invention is not limited to this, and the cassette body 1
Alternatively, it may be pushed up by a pressure lever provided so as to be vertically swingable.

[0009]

The present invention is as described above. According to the invention of claim 1, a large number of sheets are accommodated, and the sheets are sequentially taken out one by one by a take-out roller. The bottom plate is swingably mounted on the
A push-up member that pushes up the bottom plate is arranged on the lower surface side of the bottom plate,
A guide groove extending vertically is provided on the side wall of the cassette body on the paper ejection side, and a protrusion that fits into the guide groove is provided on the edge of the bottom plate on the paper ejection side. The part is guided by the guide groove of the cassette body, the tip moves up and down in parallel with the front wall of the cassette body, and the gap between the tip of the bottom plate and the corner claw at the time of the highest rise and the lowest fall is almost the same. Therefore, there is an effect that a stable paper feeding is always carried out, the paper does not fail to be fed, and the side surface of the paper can be completely guided. According to a second aspect of the present invention, in the sheet feeding cassette according to the first aspect, the position where the bottom plate of the push-up member comes into contact with and pushes up the bias plate is deviated from the center of gravity of the bottom plate toward the paper ejection side, and the push-up member is pushed up and down when the bottom plate is moved up and down. Since the rear part of the member does not descend and float due to its own weight, in addition to the same effect as the invention of claim 1, a special fulcrum for raising and lowering the bottom plate, a fixing means to the cassette body, etc. are provided. There is an effect that the bottom plate can be set by dropping it into a predetermined position in the cassette body without needing it, and the whole assembly is easy.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of the above.

FIG. 3 is a plan view of the above.

[Explanation of symbols]

 1 cassette body 2 take-out roller 3 bottom plate 4 push-up member 5 front wall 6 side fence 7 end fence 8 side wall 9 corner claw 11 guide groove 12 protrusion

Claims (2)

[Claims] 1. A cassette main body for accommodating a large number of paper sheets and sequentially taking out the paper sheets one by one by a take-out roller, the cassette main body being arranged in the main body so as to be vertically swingable. In a paper feed cassette having a bottom plate for loading sheets and a push-up member that is disposed on the lower surface side of the bottom plate and pushes up the bottom plate so that the sheets are pressed against the take-out roller, a side wall of the cassette body on the paper take-out side is provided. A paper feed cassette, characterized in that a guide groove extending in the vertical direction is provided, and a projection portion that fits into the guide groove is provided at an end portion of the bottom plate on the paper ejection side. 2. The paper feed cassette according to claim 1, wherein a position where the bottom plate of the push-up member comes into contact with and pushes up the bottom plate is deviated from the position of the center of gravity of the bottom plate toward the paper ejection side.