JPH06144641A - Paper feeder - Google Patents

Abstract

PURPOSE:To prevent the damage of an actuator at the wrong setting time of recording sheets. CONSTITUTION:Even when recording sheets 7 collide with an actuator 1 at the time of setting B5 sheets 7 to a paper supply cassette 6 set to B4 sheets and pulling out the paper supply cassette 6 in the direction of an arrow mark A from the mounted state to a device body, since the inclination of 30 deg. is formed at the actuator 1, the recording sheets 7 push up the actuator 1 around an actuator fulcrum part 2 in the direction of an arrow mark H by the pull-out force of the paper supply cassette 6. The actuator 1 thereby escapes from the recording sheets 7 so as to be placed in the K-state from the J-state and prevented from being damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device, and more particularly to a paper feeding device having an actuator for detecting the presence or absence of recording paper. For example, it is applied to a facsimile, a printer, a copying machine and the like.

[0002]

2. Description of the Related Art FIGS. 3 and 4 are views showing a conventional sheet feeding device, in which 11 is an actuator, 12 is an actuator fulcrum portion, 13 is an actuator filler portion, 14 is a sensor,
15 is a shaft, 16 is a paper feed cassette, 17 is recording paper, 18
Is an end fence. When the paper feed cassette 16 is inserted in the direction of arrow B, the actuator 11 rotates in the direction of arrow C around the actuator fulcrum portion 12, so that the actuator 11 escapes the paper feed cassette 16, the recording paper 17, and the end fence 18, and the main body of the apparatus. Can be installed inside. Since the shaft 15 serves as a stopper, the actuator 11 rotates only in the range of D to E.

As shown in FIG. 3, the paper feed cassette size is set to B4.
When the paper is set, the B5 paper 17 is set in the paper feed cassette 16, and the paper feed cassette 16 is inserted in the direction of the arrow B, the B5 paper 17 is mounted in the main body of the apparatus, but the end fence 18 does not B5 because it is not in the size position
The positional relationship between the sheet 17 and the actuator 11 is in the D state (usually, the recording sheet 17 is below the actuator 11 and is in the E state). When the paper feed cassette 16 is pulled out in the direction of the arrow A, the recording paper 17 is moved to the actuator 1
1 and the shaft 11 of the actuator 11 serves as a stopper, the actuator 11 rotates only in the direction of arrow C, so that the actuator 11 is deformed or broken like a broken line.

Further, as shown in FIG. 4, since the actuator 11 does not have the recording paper 17 in the F state, the light from the sensor 14 is blocked by the actuator filler portion 13 to be in the OFF state and it is displayed that there is no recording paper. It Further, in the G state, since the recording paper 17 is present, the actuator filler portion 13 is moved away from the sensor 14 and is in the ON state,
It is displayed that there is recording paper. If the actuator 11 is deformed or broken, such a display method cannot be normally performed. Also, the same trouble occurs when A5 paper is set in the paper feed cassette set to A4 paper.

[0005]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a paper feeding device capable of preventing damage to an actuator when a recording paper is erroneously set. .

[0006]

In order to achieve the above object, the present invention provides (1)
In a sheet feeding device having an actuator for detecting the presence or absence of a recording sheet, an actuator fulcrum portion and an actuator for escaping the recording sheet around the actuator fulcrum portion are provided, and even if the recording sheet is erroneously set in a sheet feeding cassette. The actuator is configured to allow the recording paper to escape regardless of the position of a fulcrum of the actuator, and (2) the angle of the shape of the actuator for the recording paper escape to be 30 degrees. Furthermore, (3) a member having a low friction coefficient is provided on the surface corresponding to the recording paper, and (4) the actuator and its peripheral members are integrated with resin. . Hereinafter, description will be given based on examples of the present invention.

FIG. 1 is a block diagram for explaining an embodiment of a sheet feeding device according to the present invention, in which 1 is an actuator,
Reference numeral 2 is an actuator fulcrum portion, and 3 is an actuator filler portion. The shape of the actuator 1 for escaping the recording sheet around the actuator fulcrum portion 2 is inclined at 30 degrees and is raised to the center position of the actuator fulcrum portion 2.

FIG. 2 is a diagram for explaining the operation of the actuator when recording paper is set. In the drawing, 4 is a sensor, 5 is a shaft, 6 is a paper feed cassette, 7 is a recording paper, and 8 is an end. The fence 9 is a low friction member, and the other parts having the same functions as those in FIG. 1 are designated by the same reference numerals. Even if the recording paper 7 collides with the actuator 1 when the B5 paper 7 is set in the paper feed cassette 6 set to the B4 paper and the paper feed cassette 6 is pulled out in the direction of the arrow A from the state where it is mounted in the apparatus main body, Since the actuator 1 is inclined at 30 degrees, the recording paper 7 is pushed up in the direction of arrow H about the actuator fulcrum 2 by the pulling force of the paper feed cassette 6, and the actuator 1 is removed from the recording paper 7. There is no escape, the J state is changed to the K state, and the actuator 1 is not damaged. Further, since the shape of the actuator 1 is up to the height of the center of the actuator fulcrum portion 2, the recording paper 7
It is possible to avoid damage to the actuator 1 regardless of the set amount. Further, a member 9 having a low friction coefficient is provided on the surface of the actuator 1 corresponding to the recording paper. further,
It is also possible to integrate the actuator and its peripheral members with resin.

[0009]

As is apparent from the above description, the present invention has the following effects. That is, it is possible to prevent the damage of the actuator when the recording sheet is erroneously set, so that the presence / absence of the recording sheet can be accurately displayed. Further, the operation of pulling out the paper feed cassette can be normally performed, and the reliability of the apparatus main body can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an example of a sheet feeding device according to the present invention.

FIG. 2 is a diagram for explaining the operation of the actuator in FIG.

FIG. 3 is a diagram for explaining the operation of a conventional paper feeding device.

FIG. 4 is a diagram for explaining the operation of a conventional paper feeding device.

[Explanation of symbols]

1 ... actuator, 2 ... actuator fulcrum part, 3 ... actuator filler part.

Claims (4)

[Claims] 1. A paper feeding device having an actuator for detecting the presence or absence of recording paper, comprising an actuator fulcrum portion and an actuator for escaping the recording paper around the actuator fulcrum portion, the recording paper being placed in a paper feeding cassette. A paper feeding device characterized in that, even if it is erroneously set, the actuator allows the recording paper to escape regardless of the position of the fulcrum of the actuator. 2. The paper feeding device according to claim 1, wherein an angle of a shape of an actuator for escaping the recording paper is 30 degrees. 3. The paper feeding device according to claim 1, wherein a member having a low friction coefficient is provided on a surface corresponding to the recording paper. 4. The sheet feeding device according to claim 1, wherein the actuator and its peripheral members are integrated with resin.