JPS59831B2 - Photoreceptor of electronic copying machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic copying machine, and more particularly to an improvement in the rotational drive structure of a photoreceptor.

2. Description of the Related Art Conventionally, a photoreceptor of an electronic copying machine is rotatably driven with a structure as shown in FIG.

That is, the bearings 3, 3 are attached to opposing parts of the substrates 1, 2, which are spaced apart from each other, and the support shaft 4 is fitted therein.
A knob 5 is fitted to one end of the support shaft 4, and bearings T, T provided on flanges 6, 6 are mounted inside the substrates 1, 2.
is fitted. Each flange 6, 6 is fitted onto both ends of a drum-shaped photoreceptor 8. A driven gear 9 is screwed onto the end face of one flange 6 by mounting screws 10. A drive gear 11 pivotally mounted on one of the substrates 1 meshes with the driven gear 9, and the drive gear 11 is connected to a drive source (not shown). Therefore, the driving force of the driving source is transmitted to the driving gear 11, the driven gear 9, the flange 6, and the photoreceptor 8 to rotate them, thereby obtaining the necessary copying action.

By the way, the driven gear 9 has a mounting screw 10 on the flange 6.
Although it is installed through ......, the driving force is repeatedly applied due to the frequent repetition of copying operations.
The mounting screws 10 mentioned above tend to loosen.

Also, during assembly, the mounting screws 10 are thick, making it time consuming and troublesome, and there are many parts, which has a negative impact on cost. The present invention has been made in view of the above circumstances, and its purpose is to provide strong strength, simplify assembly, and reduce costs by integrally molding the peripheral wall of the end portion of the photoreceptor as a driven gear. The purpose of this invention is to provide a photoreceptor for an electronic copying machine that can be used in an electronic copying machine.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a photoreceptor 20, which is made of, for example, aluminum and formed in the shape of a thin drum. That is, the photoreceptor 1 has a thickness of approximately 1 to 2%, except for one end portion to be described later. A driven gear 20a is integrally formed at one end. This driven gear 20a has a predetermined tooth profile and number of teeth, and is formed simultaneously with the molding of the photoreceptor 20. As shown in FIG. 3, such a photoreceptor 20 has flanges 21a and 21b fitted to both ends thereof, respectively, and is further pivotally supported on a support shaft 23 via bearings 22 and 22.
The support shaft 23 is rotatably fitted into bearings 26 and 26 provided on substrates 24 and 25 that are erected to face each other. Support shaft 2
3 is provided with a knob 27 at one end. Further, one of the substrates 24 is provided with a bearing member 26 that rotatably supports the drive shaft 28 . A main drive gear 29 connected to a drive source (not shown) is fitted to one end of the drive shaft 28, and a drive gear 30 that meshes with the driven gear 20a is fitted to the other end. By pressing a copy button (not shown), a well-known copying action is performed, and at the same time, five driving sources are operated, and the main one is
Drive gear 29 rotates.

Accordingly, the drive gear 30 and the driven gear 20a that mesh with the drive gear 30 are rotated. The photoreceptor 20 is a driven gear 20a
Since it is integrated with the paper, it must be rotated during the copying process. Since the flanges 21a and 21b are fitted to the driven gear 20a side end and the other end of the photoreceptor 20, even if a copying device comes into contact with the photoreceptor 20, the driven gear 20
Even if the drive gear 30 meshes with a, the strength is sufficient.

Further, in actual assembly, since the photoreceptor 20 and the driven gear 20a are integrally molded, there is no need to assemble them together and there is no need for mounting screws. Note that there is no problem even if the photoreceptor 40 is used as shown in FIG. 4, for example.

That is, in this case, for example, a first flange 41 and a second flange 42, which are also thin, are fitted onto both ends of a thin drum-shaped photoreceptor body 40a. Only the first flange 41 is stepped, and the driven gear 41a is integrally formed therewith. The shape of the driven gear 41a has a predetermined tooth profile and number of teeth as shown in the above embodiment. The first and second flanges 41 and 42 are rotatably supported on the support shaft 23, and the driven gear 41a meshes with the drive gear 30 fitted to one end of the drive shaft 28, similar to the above embodiment. be. Therefore, the photoreceptor 40 has sufficient strength and is extremely simple to assemble as in the above embodiment.

It goes without saying that the present invention can be implemented in various other ways without exceeding the scope of the invention.

As explained above, in the present invention, the end peripheral wall of the photoreceptor, which is formed into a drum shape and is rotatably supported on a support shaft, is integrally formed as a driven gear. Compared to a device in which a gear is attached to a photoreceptor, the number of parts is reduced, the assembly work is simplified, accuracy is improved, and an inexpensive electronic copying machine can be provided.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a photoreceptor mounting portion in an electronic copying machine showing a conventional example of the present invention, FIG. 2 is a perspective view of a photoreceptor showing an embodiment of the present invention, and FIG. 3 is a view of the mounting portion. longitudinal section,
FIG. 4 is a longitudinal sectional view of a photoreceptor mounting portion showing another embodiment of the present invention. 20, 40... Photoreceptor, 20a, 41a...
...driven gear.

Claims (1)

[Claims] 1. A photoreceptor for an electronic copying machine, which is formed into a drum shape and is rotatably supported on a support shaft, the peripheral wall of which is integrally molded as a driven gear.