JPH0312750Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed cassette for storing and feeding relatively thick copy paper such as postcards.

A typical prior art example is shown in FIG. Relatively thick copy paper such as postcards is loaded on a loading plate 2 provided on a cassette body 1. The trailing edges of the copy sheets in the paper feeding direction 3 are aligned by a trailing edge regulating member 4 . Both ends of the copy paper are aligned by side plates 5. This loading plate 2 can be angularly displaced around the axis of the pin 6, which is perpendicular to the paper feeding direction 3 and parallel to the copy paper on the loading plate 2. The front edge of the copy paper is aligned by a front edge regulating member 8 formed continuously on the side plate 5. The movable member 7 is provided on one side plate 5 so as to be angularly displaceable by means of a pin 9 which is perpendicular to the paper feeding direction 3 and parallel to the copy paper on the loading plate 2 .

FIG. 2 is a sectional view of the cassette main body 1 near the downstream side in the paper feeding direction 3. The movable member 7 has a rising portion 1
6, and a restraining part 11 which is provided above the rising part 16 at an interval and extends substantially perpendicularly to the rising part 16.
The copy paper stacked on the loading board 2 is indicated by reference numeral 12.

A guide piece 13 made of a material such as metal is fixed to the surface of the rising portion 16 on the copy paper 12 side so as to be adjustable in position.

Further, the distance between the upper end portion 14 of the guide piece 13 and the guide surface 15 of the holding portion 11 is selected to be approximately equal to the thickness of the copy paper 12. This allows the single top sheet of paper 12a to pass through the gap between the upper end 14 of the guide piece 13 and the guide surface 15. The leading ends of the copy sheets 12 on the downstream side in the paper feeding direction 3 are aligned by the front end regulating member 8 that extends bent from the side plate 5 as described above.

The mounting plate 2 is spring-biased upward by a driving member 17 provided on the body of the copying machine. As a result, the top paper 12a of the copy paper 12 is transferred to the paper feed roller 1.
Contact 0 elastically.

In such prior art, in the state shown in FIG. 2(1) where a large amount of copy paper 12 is loaded on the loading board 2,
The top paper indicated by reference numeral 12a is the holding member 1
The gap between the guide surface 15 of the copy paper 1 and the upper end 14 of the guide piece 13 is set to be approximately the same thickness as the thickness of the copy paper 12 because the guide is guided substantially parallel to the guide surface 15 of the copy paper 11. is sent out smoothly. However, in the state shown in FIG. 2 (2) where the copy paper 12 is consumed and the number of copy papers 12 on the loading plate 2 is reduced, the uppermost paper 12a is folded at an angle with the guide surface 15 of the holding part 11. In this case, it is fed into the gap, that is, the gap between the guide surface 15 of the holding part 11 and the upper end part 14 of the guide piece 13, and since the gap is narrower than the gap in the state shown in FIG. 2(1), A load is applied to the top paper 12a, making it impossible to feed the paper smoothly.

SUMMARY OF THE INVENTION An object of the present invention is to provide an improved paper feed cassette that can accurately and smoothly feed copy paper regardless of the amount of copy paper loaded.

In the present invention, a loading plate on which a copy paper is placed is swingably provided with one end as a fulcrum, and the loading plate is biased by a biasing means to press the copy paper against a paper feed roller. In a paper feed cassette configured to feed copy paper, a movable member is provided on the downstream side of the paper feed cassette in the copy paper transport direction, and the movable member is erected downstream of the copy paper in the copy paper transport direction. a rising part that presses the upper surface of the copy paper, a holding part that presses the top surface of the copy paper, and a support part that is located on the outside of the copy paper and is integrally formed with the rising part and the holding part, the rising part and the holding part. Set the gap between the cassette body and the support section so that approximately one sheet of copy paper can pass through.
Fix a pin extending parallel to the axis of the paper feed roller, and attach it to either the cassette body or the support part,
A long hole is formed through which the pin is inserted and extends vertically, and the movable member is swingable around the pin.
A pin is movable up and down along the elongated hole, and as the number of stacked copies changes, the movable member swings up and down with the holding portion in surface contact with the copy paper, and the paper feed roller This paper feed cassette is characterized in that, when rotated, copy paper passes through the gap between the rising portion and the restraining portion to feed the copy paper.

FIG. 3 is a perspective view of an embodiment of the present invention, and FIG. 4 is a plan view thereof. In the cassette main body 21, a loading plate 22 on which copy paper is loaded is arranged in the paper feeding direction 3.
The axis of the pin 23 is set perpendicular to the paper feeding direction and parallel to the copy paper on the mounting plate 22 on the upstream side (right side in FIG. 3, bottom in FIG. 4). It is provided so that it can be angularly displaced around it. A rear end regulating member 24 for regulating the rear end of the copy paper on the upstream side in the paper feeding direction 3 on the loading plate 22 is provided upright on the cassette body 21. The side plates 35 and 36 are attached to the cassette body 21 in order to align both sides of the copy sheets on the loading plate 22.
It will be erected in Paper feeding direction 3 of these side plates 35 and 36
The downstream end portions are bent in mutually opposing directions to constitute front end regulating members 37 and 38 . The front end regulating members 37 and 38 align the front ends of the copy sheets on the mounting plate 22.

The movable member 27 includes a rising portion 28 extending vertically on the downstream side in the paper feeding direction 3, support portions 29 and 30 continuous to both sides of the rising portion 28, and extending from the support portion 29 in the width direction of the mounting plate 22. It has a connecting portion 31 that is located at the top of the connecting portion 31, and a suppressing portion 32 that is slightly bent downward from the connecting portion 31 and extends substantially perpendicularly to the rising portion 28. The support parts 29 and 30 are formed with long holes 33 and 34 that extend vertically. This long hole 33,3
4 has a pin 3 protruding outward from the side plates 35 and 36.
9 and 40 are inserted gently. The axes of the pins 39 and 40 are on the same straight line, and these axes are perpendicular to the paper feeding direction 3 and parallel to the copy paper on the loading plate 22. The movable member 27 can be angularly displaced around this axis, and the elongated holes 33 and 34 can be vertically displaced along the pins 39 and 40. A paper feed roller 42 is provided above the mounting plate 22 on the upstream side of the paper feed direction 3 .

The support portion 29 is located on the outer side of the copy paper and is integrally formed with the rising portion 28 and the restraining portion 32.
The pin 39 extends parallel to the axis of the paper feed roller 42 .

FIG. 5 is a sectional view of the vicinity of the downstream end of the cassette body 21 in the paper feeding direction 3. As shown in FIG. Relatively thick copy paper, such as a postcard, placed on the loading board 22 is indicated by reference numeral 12. A guide piece 43 made of a material such as metal and facing the copy paper 12 is fixed to the rising portion 28 of the movable member 27 so that its position can be adjusted.
The holding portion 32 extends upstream and downstream in the paper feeding direction 3.

A driving member 17 provided on the body of the transfer type electrostatic copying machine presses the mounting plate 22 upward by a spring force, thereby causing the top sheet 12a of the copy paper 12 to be pushed onto the paper feed roller 42. contact elastically.

The distance between the upper end 46 of the guide piece 43 and the guide surface 44 of the holding part 32 is selected to be approximately equal to the thickness of the copy paper 12. As a result, the single uppermost sheet 12a is moved between the upper end portion 46 of the guide piece 43 and the restraining portion 3.
It can pass through the gap with the guide surface 44 of No. 2.

When a relatively large amount of copy paper 12 is loaded on the loading plate 22 as shown in FIG. . By rotationally driving the paper feed roller 42, the uppermost paper 12a is fed one by one.

In the state shown in FIG. 5(2) where the copy paper on the loading plate 22 is consumed and reduced, the guide surface 44 of the holding part 32
so that it remains in surface contact with the top paper 12a,
The movable member 27 is connected to the pin 3 through the long holes 33 and 34.
9 and 40 and angularly displaced about pins 39 and 40 in a counterclockwise direction in FIG. In this way, the uppermost paper 12a is attached to the guide piece 4
The guide surface 44 is connected between the upper end 46 of 3 and the guide surface 44.
Paper can be fed while making surface contact with the paper. In this way, regardless of the amount of copy paper 12 loaded on the loading board 22, the guide surface 44 makes surface contact with the top paper 12a,
Only one sheet of the top paper 12a can be fed by passing through the gap between the upper end 46 of the guide piece 43 and the guide surface 44. Also, the upper end 4 of the guide piece 43
The gap between the guide surface 44 and the guide surface 44 can be kept constant at all times. Therefore, the top paper 12a can be fed accurately and smoothly regardless of the amount of copy paper 12 loaded.

In another embodiment of the invention, the mounting plate 22 may be configured to be biased upwardly by a spring housed in the cassette body 21, with the drive member 17 and its associated spring being omitted. be done. As described above, according to the present invention, the rising portion and
The movable member having the holding portion is provided so as to be able to move up and down with respect to the cassette body and to swing, so that even if the number of stacked copy sheets changes, the holding portion remains in surface contact with the copy paper. can be kept. Therefore, it is possible to accurately feed copy sheets one by one, and paper jams and skew feeding are prevented from occurring.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the prior art, FIG. 2 is a sectional view of the cassette main body 11 of the prior art shown in FIG. 1, near the downstream end in the paper feeding direction 3, and FIG. FIG. 4 is a perspective view of the embodiment, FIG. 4 is a plan view of the embodiment, and FIG.
FIG. 3 is a sectional view of the vicinity of the downstream end. 21...cassette body, 22...mounting board, 2
3, 39, 40...pin, 27...movable member, 2
8... Rise part, 29, 30... Support part, 31...
...Connecting portion, 32... Suppressing portion, 33, 34... Elongated hole, 42... Paper feed roller, 43, 44... Guide piece.

Claims (1)

[Claim for Utility Model Registration] A loading plate on which a copy paper is placed is swingably provided with one end as a fulcrum, and the loading plate is biased by a biasing means to transfer the copy paper to a paper feed roller. In a paper feed cassette configured to feed copy paper in pressure contact, a movable member is provided on the downstream side of the paper feed cassette in the copy paper transport direction, and the movable member is located downstream of the copy paper in the copy paper transport direction. The rising part has a rising part that stands upright on the side, a holding part that presses the top surface of the paper, and a support part that is located on the outside of the copy paper and is integrally formed with the rising part and the holding part, and the rising part The gap between the cassette body and the holding part is set so that approximately one sheet of copy paper can pass through, and either the cassette main body or the supporting part is
Fix a pin extending parallel to the axis of the paper feed roller, and attach it to either the cassette body or the support part,
A long hole is formed through which the pin is inserted and extends vertically, and the movable member is swingable around the pin.
A pin is movable up and down along the elongated hole, and as the number of stacked copies changes, the movable member swings up and down with the holding portion in surface contact with the copy paper, and the paper feed roller A paper feed cassette characterized in that, when rotated, copy paper passes through a gap between the rising portion and the holding portion to feed the copy paper.