KR950004500Y1 - Paper transmission device for fax - Google Patents

Abstract

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Description

Separation paper feeder of image development office equipment

Fig. 1 (a) is a partial plan view of the paper separating apparatus of the present invention, and Fig. 1 (b) is a cross-sectional view taken along the line A-A 'of Fig. 1 (a).

Fig. 2 (a) is a partial cross-sectional plan view of the separate sheet feeder of the present invention, and Fig. 2 (b) is a cross-sectional view taken along the line B-B 'of Fig. 2 (a).

Figure 3 (a), Figure 3 (b) is a plan view of the operating state for explaining the operating state of the separate paper conveying device of the present.

4 is a partial plan view of a paper guide in the cassette body of the present invention device.

5 is a partial plan view of a conventional paper feed apparatus.

* Explanation of symbols for main parts of the drawings

1: frame 2: shaft

4: bushing 5: rubber roller

6: cap 7: holder

8: compression spring 9: clutch

10: solenoid 11: cam

11 ': slope 12: paper feed cassette

13, 14: paper guide 71: inclined protrusion

The present invention provides a paper transport device for the image development office equipment which picks up a sheet of paper loaded in a paper cassette one by one accurately and transfers it into an office equipment employing an electrophotographic method such as a laser beam printer, a copier and a facsimile machine. It is about.

In the paper conveying apparatus of the conventional office equipment, as shown in FIG. 5, both ends of the shaft 35 in which the rubber roller 37 is fixed at the center and the clutch 32 is provided at one end thereof are framed by the main body of the office equipment. The paper feed cassette 36, which was etched at 31 and provided with jaws 33 and 34 at both rear edge portions, was provided at the bottom of the shaft 35. As shown in FIG.

However, such a conventional configuration causes a small warpage of the paper in the jaw portion provided in the cassette, so that a relatively large friction force is generated between the paper and the paper, and at least two sheets of paper are often conveyed at the same time. When the jaw flows or the paper does not have normal conditions, multiple sheets of paper are moved simultaneously at the time of picking up, and a large amount of paper is not available when there is no function such as jaw in the manual feeder that feeds paper of various sizes. There was a problem such as not using the paper feed and use only one sheet.

The object of the present invention is to significantly reduce the friction between the paper stored in the automatic paper feed cassette, so that the pickup roller can transfer only one sheet of paper, and at the same time improve the reliability of the product. To provide a device.

Another object of the present invention is to provide an image developing office apparatus and a separate paper conveying apparatus capable of transferring a large amount of paper into a manual feeder and conveying them one by one.

An object of the present invention is to provide a paper that is in contact with the pickup roller by driving a pickup roller mounted on the paper feed cassette insertion side of the main body of an image developing office equipment such as a copying machine to move to the right by driving a predetermined solenoid immediately before outputting a paper pickup signal. Is moved to the right to cause warpage and at the same time, the friction force between the paper to be transported and the paper stored in the paper feed cassette is significantly reduced and air is picked up by the pickup drive signal. This can be achieved by allowing the operation of the solenoid to be blocked when the roller is driven so that the pickup roller is restored to its original position so that the next sheet of paper can be continuously fed exactly one by one.

This will be described in detail with reference to the accompanying drawings.

In the paper conveying apparatus of the present invention, as shown in Figs. 1 (a), 1 (b), 2 (a), and 2 (b), once the rubber roller 5 is fixed to the center part, The shaft 2 with the clutch 9 installed therein is axially held in the frame 1 of the main body, and the paper cassette 12 having the paper guides 13 and 14 installed at both corners is formed at the bottom of the shaft 2. In the installed paper conveying apparatus, between the outer periphery of the shaft (2) and the rubber roller (5), a metal pipe-type bushing (4) having a predetermined length is provided and exposed to one side of the bushing (4). One end of the shaft 2 is provided with a holder 7 made of a plastic material integrally formed with an inclined protrusion 71 of a predetermined angle, and the other end of the bushing 4 and the clutch 9 covered with a predetermined cap 6. Compression spring (8) is elastically installed between the), one side of the inner surface of the frame (1) by installing a solenoid (10) cam 11 fixed to its operating lever Inclined plane (11 ') and to abut with the two inclined protrusions 71, the sheet guide (13, 14) is detachably installed in the rear doengeot hayeoseo both edge portions of the paper cassette (12).

Here, reference numeral 3 denotes a bearing for smoothly rotating the shaft 2, 15 denotes a tension plate, 16 denotes a cone spring for allowing the paper placed on the tension plate to adhere to the rubber roller 5, 17 Is an E ring which prevents the holder 7 from being pushed to one side by the elastic force of the compression spring 8.

At this time, since both ends of the shaft 2 are cut in a 'U' shape, when the shaft 2 is rotated by the clutch 9, the bushing 4 is not idle in the shaft 2, so that the rubber roller 5 ) Rotates with the shaft (2).

Referring to the operation (3) (a) and 3 (b) of the present invention configured as described above is as follows.

First, a metal holder having a plastic holder (7) and a rubber roller (5) fixed to an outer circumferential surface of the shaft (2), both ends of which are cut in a 'U' shape, with an inclined protrusion (71) of a predetermined angle. 4) The shaft 2 is rotatably axially rotatable to the frame 1 of the main body in a state in which the cap 6, the compression spring 8 and the clutch 9 are inserted and fixed sequentially. When the solenoid 10 is installed on the inner surface, the inclined surface 11 'of the chem 11 fixed to the operating lever of the solenoid 10 comes into contact with the inclined protrusion 71 of the holder 7. .

In this state, when the predetermined copy start switch is operated to perform copying, the solenoid 10 is driven first before the clutch 9 is driven, so that the cam fixed to the operating lever of the solenoid 10 The inclined surface 11 'of 11) slides the inclined protrusion 71 of the holder 7.

Therefore, the holder 7 installed in the shaft 2 so as to be able to slide left and right is pushed in the right direction as shown in FIG. 3 (a), so that the bushing 4 having one end fixed thereto is also shaft 2 It moves to the right on the outer periphery of the compression spring 8 is elastically installed between the cap (6) and the clutch (9) provided at its other end is compressed under a predetermined elastic force.

At this time, the uppermost sheet of paper is placed on the upper surface of the tension plate 15 of the paper feed cassette 12 and adhered to the rubber roller 5 at a constant pressure by the elastic force of the cone spring 16. Since the rubber roller (5) is pushed to the right with the roller (5) by the lateral movement friction force, the right side of the paper is in contact with the paper guide (14) detachably attached to the paper cassette (12) Will occur.

Thereafter, the control unit not shown in the drawing drives the clutch 9 and at the same time blocks driving of the solenoid 10, so that the operating lever of the solenoid 10 is returned to its original position by the spring restoring force in itself and thus fixed to the end thereof. Cam 11 is returned to its original position so that the holder 7, the rubber roller 5, the bushing 4, and the cap 6 are separated by the restoring force of the compression spring 8. As is returned to the original state, the movement of the holder (7) is limited by the E ring (17).

Therefore, the paper closely adhered to the rubber roller 5 at a constant pressure is significantly reduced in friction with the paper directly below, so that only one sheet of paper is kept in the office by the rubber roller 5 while maintaining the original correct position. It is fed.

At this time, the residual frictional force of the paper directly below the paper in contact with the rubber lorler 5 may remain and be conveyed, but the paper guide 13 installed on the rear left side of the paper cassette 12 may not be moved. In reality, the paper conveyed by the left portion of the rubber roller 5 is conveyed with a slight bend, and is aligned straight by the existing alignment device.

In addition, in the general paper feed cassette device, the jaw is fixed, but in the present invention, when the paper guides 13 and 14 installed in the paper feed cassette 12 are detachably installed, only a part of the inside of the paper feed cassette device is replaced. Can be used regardless of paper size.

On the other hand, the description so far has described an embodiment applied to the paper feeder using the automatic paper feeder, when the paper feeder is applied to the manual feeder, a large amount of paper is loaded into the manual feeder one by one Can be transferred.

As described above, in the device of the present invention, a pickup roller (rubber roller) mounted on the paper cassette insertion port side of the main body of an office equipment such as a copier, etc. is driven to move to the right with the paper by driving a predetermined solenoid. By driving, the paper in contact with the pickup roller is moved to the right, and warpage occurs, thereby significantly reducing the friction force between the paper to be transported and the paper stored in the paper feed cassette. When the roller is driven, only one sheet of paper is transported and the solenoid is blocked. When the roller is driven, only one sheet of paper is transported and the solenoid is blocked, and the pickup roller is restored to its original position. It is possible to feed exactly one sheet, and also to manually feed the above feeder. If you can apply the value to load a large amount of paper in the manual feeder to be able to be transferred one by one to a useful devise that can further improve the reliability of the product.

Claims (1)

The rubber roller 5 and the clutch 9 axially shaft the shaft 2 on the frame 1 of the main body, and the paper feed cassette 12 provided with paper guides 13 and 14 on both sides of the shaft 2. In constructing a paper conveying apparatus having a), it is provided between the outer periphery of the shaft (2) and the rubber roller (5) having a predetermined length and left and right on the shaft (2) by driving the solenoid (10). A bushing 4 sliding to the right; A holder 7 formed at one end of the bushing 4 with an orthogonal protrusion 71 integrally formed on an outer circumferential surface thereof so that the bushing 4 slides left and right when the solenoid 10 is driven; A compression spring (8) installed between the cap (6) covered on the other end of the bushing (4) and the clutch (9) to return the bushing (4) to its original state when the solenoid (10) is shut off; The cam 11 having the inclined surface 11 ′ which is in contact with the inclined protrusion 71 of the holder 7 is selectively moved up and down so that the bushing 4 is moved to the left and right sides of the frame 1. A fixed solenoid 10; Paper transport apparatus of an office equipment, characterized in that consisting of paper guides (13, 14) installed to be selectively detached from both rear portions of the paper feed cassette (12) according to the size of the paper used.