JPS622185Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressing means for supporting the sides of stacked papers (hereinafter referred to as stacked sheets) used in copying machines and the like.

2. Description of the Related Art Conventionally, electronic copying machines, recording apparatuses, etc. have adopted a structure in which paper used as copying material is loaded into a cassette as shown in FIG. 1, and the paper is fed one by one from the cassette by a feeding roller. Incidentally, in order to prevent the stacked sheets placed on the stacking plate 2 from shifting on the stacking plate 2, the cassette 1 is provided with a pressing means 3 that presses the lateral side of the stacked sheets with an appropriate elastic force.
is provided. Pressing means having such a configuration are disclosed in, for example, Japanese Patent Application Laid-Open No. 48-97543 and US Pat.
As shown in the specification of No. 3919972, it is generally widely used.

FIG. 2 shows a perspective view of a commonly used pressing means, in which numeral 4 is moltoprene, which is an elastic body, and 5 is a metal plate, which is a hard body, and the elastic body 4 is fixed with adhesive. I support it. Further, the upper part 5a of the metal plate 5 is bent above the elastic body 4 to prevent the sheet from strongly hitting the elastic body 4 when loading the sheet into the cassette 1. Inside the cassette, the pressing means 3 having the above structure is pressed against the stacked sheets by a spring (not shown) with an appropriate force until the collar of the hard body 5 comes into contact with a member of the cassette. When the sheets on the stacking plate 2 are consumed, a lower spring (not shown) of the stacking plate 2 lifts the upper surface of the sheet to a predetermined position. At this time, the stacked sheets rise while being rubbed by the 4 surfaces of the elastic body of the pressing means 3. Regarding the thickness of the elastic body 4, an appropriate thickness is required in order to uniformly press the stacked sheets upward and downward of the stacking plate 2 mentioned above. That is, if the elastic body 4 is too thin than necessary, for example, it is fine when the sheet is in contact with the entire surface of the elastic body 4, but the sheet is reduced and the remaining sheet becomes the elastic body 4.
If it comes into contact with 1/4 or 1/5 of the surface of the sheet (as viewed in the height direction), it may become impossible to apply appropriate pressure to the sheet, or it may become uneven, causing skewed feeding of the sheet. Become. In other words, when the number of sheets decreases and the elastic body is partially pressed, the sheet material tries to sink into the elastic body, but in this case, if the thickness of the elastic body is thin (hard), the sheet material This is because the sheet material cannot be fully inserted into the sheet material, and since the sheet material is weak, it is pushed and curved in the width direction.

In order to solve the above problem, an appropriate thickness is required, but the elastic body 4 provided with an appropriate thickness causes the following new problem. This problem occurs when the cut surfaces of the stacked sheets are smooth, and as the stacking plate 2 rises, the stacked sheets slide on the surface of the elastic body 4 and rise. However, if there is some irregularity in the cut plane, the elasticity of the elastic body 4 is too strong, and there is a possibility that the sheet will get caught on the elastic body 4, making it impossible to raise it smoothly.

Further, the pressing means described in the above-mentioned US Pat. No. 3,919,972 has a configuration in which a side pressurer (corresponding to the elastic body 4) is pressed against the side surface of the seat by a spring, and the side pressurer is surrounded by a frame. However, this frame is a fixed member. As a result, even if the sheet material shifts in the width direction, sinks deeply into the side pressers, and comes into contact with the frame (normally, conventional configurations are designed not to do so), this frame cannot be moved, so the sheet material It is easily curved in the width direction and the end surface is easily damaged.

The purpose of the present invention is to improve the above-mentioned conventional pressing plate for stacking sheets and to solve various problems. Specifically, to provide a pressing plate in which the elastic body constituting the pressing plate is configured to have an appropriate thickness, and furthermore, even if slightly uneven stacked sheets are used, the loaded sheets can smoothly rub against the surface of the elastic body and rise. With the goal.

The present invention that achieves the above object includes, in a loading sheet pressing means that presses the side surface of the loaded sheet, elastic bodies 8, 12 that press the side surface of the loaded sheet;
15, the elastic body 8, which can press the side surface of the stacked sheet;
Hard bodies 9a, 9b, 1 moving together with 12, 15
3a, 16a, 16b, and the pressing surface of the hard body is provided at a position farther from the loaded sheet than the pressing surface of the elastic body by a distance t smaller than the thickness of the elastic body. shall be.

Further details will be given below with reference to examples and their explanatory drawings.

FIG. 3 shows a perspective view of the pressing plate of the present invention. The pressure plate 7 shown in the figure has an elastic body 8 supported by a metal plate 9, and FIG. 4 shows a sectional view of the pressure plate 7 of FIG. 3 taken in the loading direction. As shown in the figure, the pressing plate 7 of the present invention
ensure that the elastic body 8 has a sufficient thickness for uniform pressing, and that slightly uneven stacked sheets are placed on the elastic body 8.
As shown in FIG. 4, the pressing surfaces of the hard portions 9a and 9b of the metal plate are kept at a distance t from the pressing surface of the elastic body 8 (this distance t is clear from FIG. The thickness of the elastic body 8 is smaller than the thickness of the elastic body 8). The pressing plate 7 having the above structure is pressed against the stacked sheets with an appropriate force by a spring (not shown) in the cassette. With the above configuration, the pressure on the stacked sheets is guaranteed by the elastic body 8, and when the stacked sheets are raised, the hard parts 9a and 9b of the metal plates guide them, so that even if the stacked sheets are slightly uneven, they can be raised smoothly. make it possible. Of course, if the stacked sheets are not irregular, the metal plates 9a and 9b may not be necessary and the sheets may rise well without being caught on the elastic body.

In the actually constructed device, the pressing plate shown in Figs. 3 and 4 was used, the elastic body 8 was made of moltoprene with a mesh size of 120 mm and a thickness of 2 mm, and the distance t in Fig. 4 was set from 0.5 to 1.5 mm. I got good results.

FIG. 5 shows a plan view of a pressing plate showing another embodiment. In this example, a spring is not used as a means for pressing the pressing plate 10 against the stacked sheet, and the elastic body 12 of the pressing plate 10 is supported. The elastic force of the metal plate 13 is applied. In the figure, reference numeral 14 denotes a shaft member fixed to the cassette body side, and the metal plate 13 is displaced and pressed in the direction of the arrow. In the embodiment shown in FIG.
Due to a, the slightly uneven stacked sheets are placed on the elastic body 12.
It is possible to prevent the rise from being blocked.

The embodiment shown in FIG. 6 shows a pressing means 17 in which an elastic body 15 is pressed from both sides by metal plates 16. In this example, the irregularly stacked sheets are supported by portions 16a and 16b of the metal plates. The pressing means 17 presses the lateral side of the stacked sheets using a spring 18 whose one end is fixed to the cassette side.

It should be noted that as the elastic body of the present invention, other than moltoprene, felt or other encapsulated resin can be used, and as for the metal plate as the hard body supporting the elastic body, resin such as plastic can be used.

As mentioned above, the loading sheet pressing means according to the present invention can make the elastic body sufficiently thick;
The sides of the sheet can be pressed well. Further, even if the sheet is slightly misaligned and tries to dig deeply into the elastic body, the hard body prevents the sheet from going deeper, so that the sheet can be guided by the pressing surface of the hard body and rise favorably. At this time, the hard body can also move with the elastic body and press the side of the seat, so
The sheet does not curve, and misalignment of the sheet can be prevented.

[Brief explanation of the drawing]

1 is a perspective view of a cassette, FIG. 2 is a perspective view of a conventional pressing means, FIG. 3 is a perspective view of an embodiment of the present invention, FIG. 4 is a sectional view of the pressing means shown in FIG.
FIG. 6 shows a top view of another embodiment of the invention. In the figure, 4, 8, 12, 15... elastic plates,
5, 9, 13, 16...indicates a metal plate.

Claims (1)

[Scope of Claim for Utility Model Registration] In the loading sheet pressing means that presses the side surface of the loaded sheet, elastic bodies 8, 12,
15, the elastic body 8, which can press the side surface of the stacked sheet;
Hard bodies 9a, 9b, 1 moving together with 12, 15
3a, 16a, 16b, and the pressing surface of the hard body is provided at a position farther from the loaded sheet than the pressing surface of the elastic body by a distance t smaller than the thickness of the elastic body. means for pressing the loaded sheet.