JPS6067981A - Protecting device of photosensitive body - Google Patents

Abstract

PURPOSE:To prevent securely damage to the circumferential surface of a photosensitive body due to falling foreign matter, etc. by rotating a protection plate with a turning body which turns associatively with the movement of a developing device to cover the flank of the photosensitive body. CONSTITUTION:A V belt 25 is extended among pulleys 23 and 24 and the turning body 21, and the protection plate 17 is fixed to the turning body 18 meshed the turning body 21. When the developing device 9 is taken out of the device horizontally on a guide 27, the V belt 25 is turned since a coupler 26 is fixed to the guide 27 and V belt 25, and the protection plate 17 slanting above the photosensitive body 1 is rotated downward around a shaft 19 through the rotating bodies 21 and 18 to cover the flank of the photosensitive body 1. Therefore when the developing device 9 is taken out of the machine, the protection plate 17 covers the flank of the photosensitive body associatively to prevent securely the circumferential surface of the photosensitive body from being damaged by the falling foreign matter, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides that when the developing device is moved to remove it from the main body of the copying machine, the protective plate rotates in conjunction with the developing device, and the photosensitive plate is protected. The present invention relates to a photoconductor protection device that covers and protects the photoconductor.

[Prior art]

In conventional copiers with removable developing units, when the developing unit is removed from the main body of the copying machine, the photoreceptor located adjacent to the developing unit is exposed, and is susceptible to falling foreign objects. There was a risk of scratches occurring, and of damage to the photoreceptor by shaking hands or wristwatches, rings, etc. when disposing of clogged sheets.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and when the developing device disposed adjacent to the photoreceptor is removed, a protective plate that rotates in conjunction with the movement of the developing device is installed. The object of the present invention is to provide a photoconductor protection device that is installed around the photoconductor, covers and protects the circumferential surface of the photoconductor on the side of the developing device with the protective plate, and can prevent damage to the circumferential surface of the photoconductor due to foreign matter falling rings. It is.

[Structure of the invention]

In order to achieve the above object, the present invention provides a plurality of pulleys on the side wall of the machine on the side of the developing device, and a V-belt is stretched around the pulley, and the V-belt is attached in the direction of movement of the developing device. The V-belt is connected to the developing device so that it moves with the movement of the developing device, and the rotating body that rotates by engaging with the rotation of the V-pulley is connected to the photoreceptor. A protective plate is installed nearby and rotates together with the rotating body, and the protective plate rotates to cover the developing unit side circumferential surface of the photoconductor, protecting the photoconductor circumferential surface and preventing foreign matter from falling. This is to prevent damage caused by.

〔Example〕

The present invention will be explained below based on embodiments shown in the drawings. ′ FIG. 1 is a side view of the inside of the copying machine main body (A).

+11 is a photoconductor, and around the cylindrical photoconductor +11, there is a charged corotron (2) that charges the circumferential surface of the photoconductor (11), a charging corotron (2) that charges the circumferential surface of the photoconductor (11), and a photoconductor (11 that is exposed to light to form an electrostatic latent image). a developing roll (4) for developing the latent image with toner, a transfer corotron (5) for transferring the developed visible image onto paper, and a static elimination corotron (6). A rubber blade (7) or the like is provided for peeling off residual toner adhering to the circumferential surface of the photoreceptor (1).
(8) is a mirror that reflects the light emitted from the exposure lamp and transmitted through the lens via the original onto the circumferential surface of the photoreceptor (11).

(9) is a developing device, hopper α [, brush (11)'
.

A stirring device (12) and the like are provided. Furthermore, a cartridge (13) for supplying toner is provided in a housing (14) above the hopper aφ.

In addition, (15) is a paper feed cassette, and the same cassette (15) is a paper feed cassette.
The paper in 5) is transported to the transfer section by a paper feed roller (16).

A protection plate (17) is provided adjacent to the developing device (9) and diagonally above the photoreceptor +11. The same protection plate (17)
As shown in Fig. 2, it is integrally fixed to a rotating body (18) rotatably provided on the side wall of the machine, and rotates around a pivot (19) of the rotating body (18) to perform development. It is configured to cover the circumferential surface of the photoreceptor (1) on the side of the container (9).

Since the photoreceptor (1) has a cylindrical shape, the protective plate (17)
) is formed into a rectangular shape as shown in FIG.

Further, in order to prevent the S protection plate (17) from coming into contact with the photoreceptor (1), a stopper (20) is provided at a lower front position of the photoreceptor +11. The rotating body (18) further includes:
A rotating body (21) is engaged with the rotating body (21).

The rotary body (21) is also provided with a V-pulley (22) coaxially with the rotary body (21) so as to be rotatable on the side wall of the body. Note that the rotating bodies (18) and (21) may both have a gear structure, or both may have a structure in which a roller having an elastic body fitted around the circumference is pressed into engagement with the rotating bodies (18) and (21).

In addition, V pulleys (23) and (24) are rotatably provided on the peripheral wall of the machine body parallel to the horizontal direction in which the developing device (9) moves, and the V belt (2) is provided between the pulley (22) and the
5). V pulley (23) and (2)
4) between the ■ Bell) (25) and the developing device (9).
) are connected °ζ. That is, a connecting tool (26) is interposed between the V-belt (25) and the developing device (9), and the V-belt (25) is connected to the developing device (9) through the connecting tool (26) as the developing device (9) moves. (27) is a developing device guide, which guides the developing device (9) to the main body of the copying machine (A).
This is for making the slide of the developing device (9) into an indoor bath when the developing device is removed, and the parallel portion (25a) of the V-belt (25) and this developing device guide (27) are provided in parallel. ing.

As shown in FIG. 4, the connector (26) has a bell (25) fixed to one end, and a developer guide (27) attached to the center.
1. Attachment member (28) for developing device (9) on the top surface
are removably connected via screws (29).

Further, a spring (30) is provided on the take-out side, which serves as a stopper for the connector (26) and is biased when the developing device (9) is removed, making it easy to take out. .

Note that the V-pulley (22) may be a flat pulley to press the belt directly against the rotating body (18). Alternatively, a structure may be adopted in which the V-pulley (22) is pressed against the rotating body (18).

〔Effect of the invention〕

As explained above, according to the present invention, when the developing device is moved to remove it, the protective plate works together to cover and protect the same surface of the photoreceptor, so damage to the photoreceptor's circumferential surface due to falling foreign objects, etc. This has the effect of reliably preventing this.

[Brief explanation of the drawing]

Fig. 1 is a side view of the inside of the copying machine main body, Fig. 2 is a side view of a photoreceptor protection device showing one embodiment of the present invention, Fig. 3 is a perspective view of the protection plate, and Fig. 4 is FIG. 3 is a perspective view of a connecting portion of the developing device. (A): Copying machine body (1): Photoconductor (2): Charging corotron (3): Exposure section (41j current (Ill roll) (5): Transfer corotron (6) 8 Static elimination corotron (7) Niblade (8) :Mirror (9)
:Developer Qω2 hopper (11) :Brush (12) :Agitator (13) :Cartridge (1
4) :Housing (15) :Paper cassette (16)
): Paper feed roller (17): Protective plate (1B), (
21): Rotating body (19): Pivot (20): Stopper (22), (23), (24): V pulley (2
5): V-belt (25a): Parallel part (26): Connector (27): Developing unit guide (28): Mounting member
(29): Screw (30) Nispring Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A photoreceptor protection device that rotates in conjunction with the developer when the developer is moved to remove it, and covers and protects the photoreceptor, with multiple units installed on the side wall of the machine on the side of the developer. a V-pulley, a V-belt stretched around the V-pulley and connected to the developing device, a rotating body that rotates while engaging with the V-pulley, and a rotating body that rotates together with the rotating body to rotate the photosensitive material. 1. A photoconductor protection device characterized by comprising a protection plate that covers and opens the peripheral surface of the photoconductor on the developing device side.