JPH0117975B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet storage cassette for use in a copying machine, for example, and particularly to a sheet storage cassette that can store sheets with their side edges aligned, regardless of the number of sheets to be stored. This is what we intend to provide.

For example, in conventional sheet storage cassettes for copying machines, the internal dimensions of the cassette are somewhat larger than the dimensions of the copy paper to be stored, due to variations in the cutting dimensions of the sheets (hereinafter referred to as copy paper) and how they expand and contract due to moisture absorption. It is manufactured. For this reason, there is inevitably a gap (hereinafter referred to as clearance) between the inner wall of the cassette and the side edge of the copy paper stored therein, which makes it difficult to set many sheets of copy paper in the cassette. , at the stage of loading this into a copying machine, the copy paper will be randomly positioned by an amount corresponding to the play. Therefore, as illustrated in FIG. 1, the copy paper 1 is laterally shifted by a dimension a, which is the maximum value of the play dimension, with respect to the original position of the original document 2, and as a result, as illustrated in FIG. As such, the image of the original document 2 is copied onto the copy paper 1 with a shift, and in some cases, an inconvenience occurs in that important parts are not copied.

In order to solve this kind of problem, as shown in FIG. There was one in which one end of the paper 6 was pressed against the inner wall of the cassette 3. Note that 7 in FIG. 3 is a separation claw for facilitating the removal of the top layer of copy paper.

However, with this structure, when there is a lot of copy paper 6 in the cassette 3, the push plate 5 is at the position shown by the solid line in FIG. The copy paper 6 was displaced to the position shown, and the copy paper 6 was pushed too much, causing it to bend as shown in the figure, which caused problems during paper feeding. Furthermore, in the above structure,
Since the copy paper 6 is pressed at one location, there is also the problem that the copy paper 6 is tilted as shown in FIG.

The present invention aims to provide a seat storage cassette that solves the above-mentioned problems, and the details thereof will be explained below based on the illustrated embodiments.

FIG. 6 shows an exploded perspective view of an embodiment of the present invention, in which 10 is a cassette that can store a large number of copy sheets of a predetermined size, and 11 is a press plate that presses the copy sheets to align their side edges. A support shaft 12 is attached to the substantially central portion thereof. 13 is a coil spring, and 14 is an E-shaped ring for retaining. These are attached to the cassette 10 in the following procedure. First, insert the coil spring 13 into the support shaft 12,
Next, the support shaft 12 is inserted from the inside of the cassette 10 into the hole 15 bored approximately in the center of one side plate 10a of the cassette 10, and an E-shaped ring is attached to one end of the support shaft 12 protruding outward from the cassette 10. 14 and lock it.

Separation claws 16a and 16b for separating copy paper are rotatably mounted on the inner wall of the cassette 10 in the paper feeding direction, and one of the separation claws 16a is attached to the above-mentioned mounting structure of the push plate 11. It has a similar structure. That is, the push plate 16 having the separation claw 16a is attached to the support shaft 17, the coil spring 18, the E-shaped ring 19, and the hole 20 bored in the side plate 10a of the cassette 10.

Here, the holes 15 and 20 are formed to be slightly larger than the outer diameter of the support shafts 12 and 17.
The coil springs 13 and 18 can freely slide inside the holes 15 and 20, and the coil springs 13 and 18
1 and 16 are fitted to the outer periphery of the support shafts 12 and 17, respectively, and the push plate 11
and the inner wall of the side plate 10a of the cassette 10, and between the push plate 16 and the inner wall of the side plate 10a of the cassette 10, respectively, to urge the push plates 11 and 16 to move toward the inner wall of the other side plate 10b of the cassette 10. However, in this case, the push plate 1 of the coil springs 13 and 18
By placing pressure points on cassettes 1 and 16 near the joints with support shafts 12 and 17, the cassette 10
When the copy paper stored in the copy paper runs low, the push plates 11 and 16 are tilted, which is convenient for aligning the side edges of the copy paper. That is, for example, as shown in FIG.
When a large number of copy sheets are loaded, the press plate 11 uniformly contacts and presses the side edges of each copy sheet 21, so that it becomes parallel or almost parallel to the inner walls of the side plates 10a and 10b of the cassette 10. As shown in FIG. 8, when the number of copy sheets 21 in the cassette 10 decreases, a load is applied to the push plate 11 at a position below the support shaft 12, so a coil spring is installed at the bottom of the push plate 11 due to the lever principle. Only a fraction of the spring pressure of the push plate 13 is applied, so that the lower part of the push plate 11 is inclined in a direction approaching the inner wall of the side plate 10a, and the copy paper 21 is pushed into the cassette 1.
There is no deflection within 0. The above action is performed by the push plate 16.
The same can be said for . FIG. 9 shows a top view of this embodiment, but in actual use,
If the protrusion of the support shafts 12 and 17 impedes loading into the copying machine, a cassette structure may be adopted in which an outer plate 10c is further integrally molded, as shown by chain lines in FIG.

In the above embodiments of the present invention, the coil springs 13 and 16 are used to move and bias the push plates 11 and 16.
18, but other elastic members, such as sponge-like plastic or rubber, may be used in place of them, and the location of the elastic member is not limited to the location shown in the figure, but may also be placed on the spindle. It may be an extension.

As is clear from the above description, the sheet storage cassette of the present invention has a movable push plate on one side plate that presses the side edges of the sheets stored in the cassette toward the other side plate of the cassette. Moreover, by being provided in a tiltable manner, even when the number of sheets stored in the cassette decreases, the sheets can be pressed well without bending and their side edges can be aligned. Particularly when used as a paper feed cassette for a copying machine, it brings about a great effect in that paper can be fed and copied without causing any relative positional deviation with respect to the original to be copied.

[Brief explanation of drawings]

Figures 1 and 2 are a perspective view and a top view for explaining the relative positional relationship between originals and copy paper in a copying machine, Figure 3 is a partially cutaway top view of a conventional sheet storage cassette, and Figure 4 is a top view of a conventional sheet storage cassette. is a cross-sectional view of the conventional example,
FIG. 5 is a partially cutaway top view of the conventional example, FIG. 6 is an exploded perspective view of an embodiment of the present invention, and FIGS.
The figures are cross-sectional views of the same embodiment in various states, and FIG. 9 is a top view of the same embodiment in the seat storage state. 10...cassette, 10a, 10b...side plate,
11... Push plate, 12... Support shaft, 13... Coil spring, 14... E-shaped ring, 15... Hole, 16...
Push plate, 16a...Separation claw, 17...Spindle, 18...
...Coil spring, 19...E-shaped ring, 20...
Hole, 21... Copy paper.

Claims (1)

[Scope of Claims] 1. A push plate that can come into contact with one side edge of the sheets 21 stored in the cassette 10 is provided on one side plate portion 10a of the cassette 10, which is capable of storing a large number of sheets 21 of a predetermined size. 11 in a direction in which it can approach and move away from one side edge of the sheet 21, and the distance from the inner wall of the side plate portion 10a of the cassette 10 is determined by the number of sheets 21 stored in the cassette 10. The push plate 11 is provided so as to be movable at least at the upper and lower portions according to the
is the sheet 21 stored in the cassette 10.
A sheet storage cassette characterized in that it has a movable biasing means 13 that applies a movable biasing force in a direction that presses one side edge of the sheet storage cassette. 2. Two push plates 11 and 16 are provided in the longitudinal direction of the sheets 21 stored in the cassette 10, and among the push plates 11 and 16, one push plate 16 on the paper feeding direction side separates the sheets. 2. The sheet storage cassette according to claim 1, further comprising a separating claw 16a.