JPH0215876Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a document feeding device in a copying machine, a facsimile machine, etc.

BACKGROUND ART Conventionally, this type of document feeding device feeds documents stacked on a document table by moving a pickup roller supported by an actuating plate downward.
There is one that uses a separating roller to separate the sheets one by one and send them out. Here, although the calling rollers are spaced apart on the axis, when they are in contact with the original, they are not balanced left and right, and tend to cause skew.

Purpose This invention was developed in view of the above points, and is a document feeder that has a simple structure, does not cause document skew, and can effectively guide the document and feed it without jamming. The purpose is to obtain equipment.

Configuration An embodiment of this invention will be described based on the drawings. First, as shown in Fig. 2, the calling roller 3 is moved downward for the original 2 stacked on the original table 1 to contact the topmost paper, and then rotated together with the separating roller 4 to send out the original. , separation roller 4
The paper is separated into individual sheets and then fed.

The calling rollers 3 are provided at both ends of a shaft 5, and this shaft 5 is supported by a shaft 6 of the separating roller 4 by an operating plate 7 as a rotatable paper guide. As a support method, the bearing portion for the shaft 5 is a vertically elongated hole 8, and the calling roller 3 is supported so as to be able to move up and down.
Further, an L-shaped support 9 is attached to the actuating plate 7, and an intermediate roller 1 is attached to the center of the shaft 5.
0 is provided, and the support portion 11 is configured. On the other hand, a pin 12 is provided on a part of the actuating plate 7, and a pressing piece 13 is provided on the actuating shaft 14 for upwardly displacing the actuating plate 7 to the retracted position via the pin 12. In order to rotate the operating shaft 14, a solenoid 17 is provided outside the side plate 15 using a support piece 16, and this solenoid 17 rotates the operating lever 18. 19 is a return spring. Further, a pulley 20 is provided on the shaft 5, and a timing belt 21 is stretched between the pulley 20 and the pulley on the separation roller 4 side. A hole 22 is formed in a part of the document table 2, and a sensor 23 for detecting the document 2 is provided.

In such a configuration, when the original 2 is set on the original table 1, the sensor 23 detects that the original is set. This causes solenoid 1
7 is suction driven and rotates the actuation lever 18, so the actuation shaft 14 rotates in the direction of the arrow. Then, the pressing piece 13 descends and the pin 12 escapes, so that the operating plate 7 is displaced downward toward the document table 1 due to its own weight, and the calling roller 3 comes into pressure contact with the uppermost document 2. At this time, the shaft 5 of the calling roller 3
is supported by the elongated hole 8 so as to be able to move up and down, and the weight (50 to 300 g) of the actuating plate 7 is placed on the center part by the intermediate roller 10. Since the rollers are arranged in a straight line, the pressing force of the left and right calling rollers 3 on the document 2 is uniform. Therefore, when the separation roller 4 and the pick-up roller 3 rotate in the feeding direction based on the drive source, the document 2 is sent out toward the separation roller 4 without being skewed because there is no bias in the conveying force between the left and right pick-up rollers 3. . Then, the paper is separated into one sheet by the separation roller 4 and fed. Thereafter, the solenoid 17 is turned off and the actuating plate 7 returns to its original position.

In this way, according to this embodiment, the calling roller 3
Since it operates in a similar manner, skew can be eliminated with a simple configuration.

Further, the lower surface of the actuating plate 7 and the upper surface of the original 2 are maintained at a constant interval because the shaft 5 of the extrusion roller 3 is pressed by the intermediate roller 10 whose axis center position is fixedly provided to the actuating plate 7. Ru. Therefore, the curled original 2 can be corrected without interfering with the movement of the original 2, and the actuating plate 7 can prevent the original 2 from lifting up.
This can be prevented and guided. Therefore, there is no possibility that the document 2 will be jammed.

Effects Since this device is constructed as described above, the calling roller is not fixedly attached to the paper guide, but is attached so that it can swing from side to side, and
Because the belt is connected to the separation roller so that it is driven by the shaft, the left and right calling rollers can be brought into contact with the document with uniform pressure using a simple structure.This allows the document to be sent out without causing skew. Furthermore, the distance between the bottom surface of the paper guide and the top surface of the document does not hinder the movement of the document, and it guides the document reliably by correcting curled documents and preventing the document from lifting up. It has the effect of being able to.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a perspective view, FIG. 2 is a vertical side view, and FIG. 3 is a vertical front view. 1... Original table, 2... Original, 3... Calling roller, 4... Separation roller, 5... Axis, 6...
Shaft, 7...Paper guide, 8...Elongated hole, 10...
...Intermediate roller.

Claims (1)

[Scope of utility model registration request] A separation roller supported by a shaft is disposed near the end of the document table on which the document is placed, and a paper guide is rotatably provided on the shaft of the separation roller to face the top surface of the document. A vertically long elongated hole is formed in the free end of the vertical side plate formed on both sides of the guide, and a shaft with a calling roller fixed at both ends is attached to this elongated hole so as to be movable up and down. and the axis of the separation roller, a belt is provided to extend between these pulleys, and an intermediate roller that contacts the paper guide approximately above the center of the calling roller is fixed in its axis and is rotatable. A document feeding device characterized in that it is attached to.