KR920007305B1 - Sheet supply roller release apparatus for copying machine - Google Patents

Abstract

The releasing device for paper feeding roller comprises press member (2a) formed with semicircular groove (2b) downward, extension frame (2) formed with shaft hole (2c), paper feeding roller (9) supported by compression spring (8), spring stopper (5) mounted on a side of actuator (3) the actuator (3) actuated by the movable bar (4) mounted on the sprint stopper and spring. The press member (2a) with a groove (2b) is positioned on the shaft (11) of paper feeding roller (9) supported by compression spring (8) and is pressed downward for feeding roller (9), and the paper caught by a roller (10) is released by the space formed between the upper feeding roller (10) and the lower feeding roller (9).

Description

Coupling roller release mechanism

1 is a schematic view of a copier.

2 is a side view of the present invention.

3 is a perspective view of the present invention.

* Explanation of symbols for main parts of the drawings

1: Leva 2: Extension

2a: pressurization part 2b: groove

3: linkage 4: movable rod

5: spotter 6: spring

7: body cover 7a: auxiliary cover

12: axis

The present invention relates to an apparatus for easily removing a paper by releasing the paper feed roller when a paper feed chain is caught by a paper feed roller during paper feeding.

The commonly used copying apparatus is described with reference to the electrophotographic copying machine system diagram shown in FIG. 1 and describes the general copying function. The photosensitive drum is charged evenly by the corona discharge of the charger 25 and the photosensitive drum The portion charged by the rotation of 28 is exposed by the light reflected from the original on the document table 21 by the light source of the exposure lamp 22.

After these exposures, the axial magnification and the like are processed by the four mirrors 23 and the lens 24, an electrostatic latent image such as an image of the original is generated on the photosensitive drum 28, and the generated latent image is then developed by the developer 27. The photo paper developed by the toner and then turned into a visible image while passing through the feed roller 20 is transferred to the photo guide through the register roller 26 and transferred to the photosensitive drum 28. The action of (32) causes the visible image on the photosensitive drum 28 to be transferred onto the copy paper 31.

At this time, the copy paper is in close contact with the photosensitive drum 28 by the electrostatic force and the separator 33 serves to separate the close contact with the copy paper.

Thereafter, the separated copy paper is conveyed by the conveyance belt 30, and the separator 33 serves to separate the closely contacted copy paper.

Thereafter, the separated copy paper is conveyed by the conveying belt 30 and is transferred between the heating roller 35 and the pressing roller 34 of the fixing part 40 to the discharge tray 39 to communicate with each other by heat and pressure. The image of the original is settled on the used surface to produce the desired copy.

On the other hand, residual toner and latent image are present on the drum with the transfer machine 32, where the toner is removed by the cleaner 29, and the latent image is removed by the latent image removal lamp 37.

Due to the mechanism of the copier made as described above, the paper 31 loaded in the cassette is transferred by the paper feed roller 20, and jams of the paper 31 are generated between the paper feed rollers 20.

When jams occur by the above technique, conventionally, the paper is pulled directly from the outside to be removed.

Removing the jammed paper between the feed rollers in the above manner damages the surface of the feed roller due to the removal of the paper in a direction opposite to the polishing direction formed on the feed roller, and the paper is broken and cannot be reused. In addition, the paper portion enters between the polishing roughness, thereby reducing the frictional force. If the machine is used for a long time in the above state, the conveying power of paper will be greatly reduced and the paper will be frequently jammed. The resolution of image quality is reduced. In addition, the contamination of the parts caused a problem of reducing the life of the product.

The present invention has been made in order to solve the above problems, when the paper conveying chain is jammed between the paper feed roller releases the paper feed roller to easily remove the paper without causing surface damage and paper damage caused by paper removal. It is an object of the present invention to eliminate.

An embodiment for achieving the above object will be described in detail with reference to the accompanying drawings. The pressing portion 2a, which has a groove 2b formed at the end of the extended portion 2 bent orthogonally to both sides, is located above the shaft 11 of the paper feed roller 9 supported by the compression spring 8. A hole 2c is formed at a predetermined distance to the one side, and the shaft 12 is moped, and a spring stopper 5 and a spring 6 are installed at one side of the linkage part 3 formed upward in the center of the lever 1. The linkage unit 3 is operated by the rod 4 so that the lower feed roller 4 is far from the upper feed roller 10.

The effect of the present invention configured as described above is that the paper is conveyed by the copying paper feed rollers 9 and 10 in the copier made of one power source. At this time, if a paper jam occurs in the feed rollers 9 and 10, the power of the machine is cut off and stopped.

In such a state, when the movable rod 4 installed between the body cover 7 and the auxiliary cover 7a of the portion where the cassette is mounted is pushed into the inside of the apparatus by hand, the lever 2 of the shaft 12 is installed. Since the interlocking part 3 formed upward in the center is pushed, the pressing part 2a formed at the end of the extension part 2 bent orthogonally to both sides of the lever 1 is interlocked downward.

At this time, the pressurizing portion 2a having the groove 2b downwardly at the end of the extension portion 2 is positioned on both shafts 12 of the feed roller 9 supported by the compression spring 8, and is located at the bottom of the feed roller. When pressing (9) downward, a space is formed between the upper feed roller (10) and the lower feed roller (9) to remove the paper jammed between the feed rollers (9), (10).

In the above state, the operation of the movable rod 4 is stopped and the initial state is maintained by the restoring force of the spring 6 in the movable rod 4, and the lower feed roller 9 is held by the spring 8. It is in contact with the paper feed roller 10 located in the upper to achieve a copy state.

As described above, the present invention removes the paper jammed in the feed roller using a structurally simple device so that the paper is removed while the feed roller is released, thereby preventing damage to the feed roller, extending the life of the product, and preventing the paper from being damaged. By reusing it, you can reduce costs and improve product reliability.

Claims (1)

In the feeding part of the copier using the electrophotographic method, the feeding part supported by the compression spring 8 is the pressing part 2a which formed the groove 26 downward at the end of the extension part 2 bent orthogonally to both sides. A hole 2c is formed at an upper end of the shaft 11 of the shaft 9 at a predetermined distance to the one side, and the shaft 12 is axially held and a spring stopper on one side of the linkage part 3 formed upward in the center of the lever 1. (5) and the interlocking portion (3) is operated by the movable rod (4) provided with the spring (6), the lower feed roller (9) is a paper feed release device 10 away from the upper feed roller (10).

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