JPH0611959Y2 - Paper cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet feeding cassette for a copying machine or the like.

[Prior Art] When feeding cut sheets one by one to a copying machine or a printer, mount a feeding cassette in which a large number of cutting sheets are stacked in the copying machine, and then feed the cutting machine side. It is designed to pull out one by one with a paper roller.

The general structure of such a sheet feeding cassette is such that the stacking plate is housed in the cassette case and the stacking plate is biased by a spring provided below the stacking plate so that the cut sheets on the stacking plate are fed to the sheet feeding roller side. It is configured so as to be constantly pressed to.

[Problems to be Solved by the Invention] The sheet feeding cassette having such a structure has a relatively simple structure, but has a large number of parts, and the position between the constituent elements when the spring is set. There is a problem that the alignment is complicated and requires a lot of assembly labor and time.

The present invention has been made in view of the above points, and an object of the present invention is to provide a sheet feeding cassette having a small number of parts and eliminating assembly and adjustment.

[Means for Solving the Problems] In the present invention, at least a bottom surface portion of a cassette case is formed from an elastic member, and a part thereof is cut out and deformed to form a rising portion that rises from the bottom surface portion. The elasticity is used to press the paper against the paper feed roller to achieve the above object.

[Operation] In the present invention, it is possible to press the paper against the paper feed roller by utilizing the elasticity of the standing portion integrally provided in the cassette case.

[Embodiment] An embodiment of the paper feeding cassette according to the present invention will be described with reference to the drawings.

In FIG. 1, the cassette case 11 has a rectangular box shape in a plan view, and is entirely made of elastic plastic. Then, the bottom portion 12 is cut out and deformed to form an upright portion 13 that stands up from the bottom portion 12. That is, in this embodiment, the upright portion 1 having a U-shaped planar shape.
3, the base ends 14 and 14 are integrated with the bottom surface portion 12 and are deformed so that the tip end 15 rises from the bottom surface portion 12. Therefore, when a force is applied to the standing portion 13 in the free state shown in FIG. 1 from the upper side, the standing portion 13 sinks downward due to deformation of the vicinity of the base ends 14 and 14. When the force is removed, the free state shown in FIG. 1 is restored.
Here, it is understood that the raised portion 13 acts as a spring. FIG. 2 shows a side cross section of the paper feed cassette, and the standing portion 1
A stacking plate 19 is placed on the stack 3, and a plurality of cassette sheets 2 are stacked on the stacking plate 19. Reference numeral 17 is a separation claw.

The paper feeding cassette configured as described above is used, for example, in the copying machine 20.
Are set as shown in FIG. The copying machine 20 in this embodiment includes a paper feed roller 21 and a timing roller 2.
3, the separation roller 24 and the feed rollers 25 and 26 are formed to feed the cut sheet 2 to all processes. Reference numeral 27 is a photosensitive drum, 28 is a transfer portion, and 29 is a fixing portion. Further, 22 is a detector for obtaining image timing.

Next, the operation will be described.

As shown in FIG. 2, if a paper feed cassette in which a plurality of cut sheets 2 are stacked is attached to the copying machine 20 as shown in FIG.
The cut sheet 2 is biased upward in the drawing by the elasticity of the standing portion 13 rising from the bottom portion 12 of the cassette case 11 via the stacking plate 19, and its position is regulated by the separating claw 17. That is, the cut sheet 2 is constantly pressed against the sheet feeding roller 21. Here, when the paper feed roller 21 is driven, the uppermost cut sheet 2 is pulled to the right in FIG. 3 by the frictional force with the paper feed roller 21, and then the separation claw 17 operates into the copying machine. It is fed. Detector 2 on board
After the image timing is set at 2, the image is sent to the transfer unit 28 by the timing roller 23. The sheet 2 to which the toner image is transferred is separated from the photosensitive drum 27 by the separation roller 24 and is sent to the fixing unit 29. After that, the feed rollers 25, 26
Is discharged in.

Thus, according to this embodiment, the cassette case 11 is made of plastic (elastic member), the standing portion 13 is formed by notching and deforming a part of the bottom portion 12, and the elasticity of the rising portion 13 is utilized. And feed paper 2 to paper feed roller 2
Since it is configured to be pressed to 1, it is not necessary to assemble and attach a spring or the like in the cassette case 11. Therefore, it is possible to provide a sheet feeding cassette which has a small number of parts, is simple in assembly and requires no adjustment, and has a low cost.

In the above embodiment, the entire cassette case 11 is made of plastic, but the point is that the elasticity of the standing portion 13 rising from the bottom surface portion 12 can be utilized, so the bottom surface portion 12
Only the chisel may be made of plastic. Of course, the material of the elastic member does not matter.

Further, the shape of the standing portion 13 is not limited to the above disclosed range. For example, the bottom surface may be raised from the separation claw 17 side, or both ends may be integrated with the bottom portion and the middle thereof may be raised in a semicircular shape.

[Effects of the Invention] As is apparent from the above description, according to the present invention, the cut sheet is pressed toward the paper feed roller by utilizing the elasticity of the standing portion formed by notching and deforming the bottom portion of the cassette case. Since it is configured to do so, it is possible to provide a low-priced sheet feeding cassette that has a small number of parts and does not require assembly and adjustment.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a sheet feeding cassette according to the present invention, FIG. 2 is a side sectional view of the same, and FIG. 3 is a view showing a case where the same is mounted in a copying machine. 2 ... Paper, 11 ... Cassette case, 12 ... Bottom part, 13 ... Standing part, 21 ... Paper feed roller.

Claims (1)

[Scope of utility model registration request] 1. A cassette case, at least a bottom surface portion of which is formed of an elastic member, and a portion of which is cut out and deformed to form a rising portion which rises from the bottom surface portion, and the elasticity of the rising portion is used to feed a sheet. A paper feeding cassette characterized in that it can be pressed against a paper roller.