JPS58144873A - Cleaning device in electrophotographic copying machine or the like - Google Patents

Abstract

PURPOSE:To simplify the construction of a cleaning device by constituting a sealing film in contact with a screw-like conveying member and toners are recovered by utilizing the oscillation of said film. CONSTITUTION:The toners T stuck on a photosensitive drum 1 are scraped off by a doctor blade 4 according to the rotation of the drum 1, and fall onto a sealing film 9 which is disposed obliquely. Since the preceding end 9a of the film 9 is in contact with a screw-like auger 10 under rotation, the toners T on the film 9 are dropped successively into a housing 11 in the lower part by the oscillation thereof and are fed to a recovering vault by the auger 10. The oscillation of the film 9 gives no influence upon the drum 1 because the central part thereof is supported with a support plate 6. Since there is no need for paddles for scraping the toners, the construction is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for various machines using an electrophotographic process, such as an electrophotographic copying machine, a printer, and a 7-inch printer, and particularly to a powder toner recovery device.

In the electrophotographic process, the powder toner adhering to the surface of the photoreceptor drum after the transfer process is removed in the next cleaning process, and an example of such a cleaning device is shown in Figure 1. be.

That is, in the cleaning device 02 disposed adjacent to the photoreceptor drum 01, the toner T adhering to the surface of the drum 01 is scraped off onto the seal film 04 by the doctor blade 03, and further , is scraped into the housing 07 by a rotatably driven paddle 05, and conveyed into a collection bolt (not shown) by an auger 06 (scricoe type conveyor) inside the housing 07.

The cleaning device has problems in that it has a relatively complicated structure, has a large number of parts, and is expensive to manufacture.

In view of the above circumstances, the present invention is an improvement on the cleaning device described above, and its purpose is to provide a cleaning device with a small number of parts, a simple structure, and a low manufacturing cost. .

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

A cleaning device 2 disposed adjacent to the photoconductor drum 1 in the axial direction is supported by a plate U-shaped 3, and a cleaning device 2 is provided with a cleaning device 2 that is constantly in contact with the surface of the photoconductor drum 1 under a predetermined pressure. - The blade 4 and the toner receiver have a housing 11 that functions, and an auger 10 that is a screw-like conveying member disposed within the housing 11.
), the knee side 9a of the same auger 10 contacts, and the other side 9
b is provided with a seal film 9 extending toward the blade 4 side.

The seal film 9 is supported at its center by a support plate 6 extending in the axial direction of the photoreceptor drum 1, and the support plate 6 has arms 7 attached to both ends thereof. is pivotably supported on the shaft 5 at the part, and also,
It is suspended by a tension coil spring 8, and due to this suspension, both end portions 9a, 9b of the sealing film 9,
The contact pressures between the photoreceptor drum 1 and the auger 10 are set appropriately.

The support plate 6 and the arm 7 are made of a rigid member that does not resonate with the seal film 9.

The configuration of this embodiment is as described above, and its operation will be explained next.

The toner T adhering to the photoreceptor drum 1 is
As the film rotates, it is scraped off by the doctor blade 4 and falls onto the sealing film 9 arranged at an angle.

However, the sealing film 9 has one tip 9
a is in a rotating state with a screw-shaped auger lO,
Since they are in contact with each other, a predetermined vibration is applied as the contact point changes, and due to this vibration, the toner T on the seal film 9 is sequentially moved to the housing 11 disposed below.
The auger 1O feeds the retrieval bolt.

Note that since the seal film 9 is supported at its center by the support plate 6, the vibration applied to the tip 9a is not transmitted to the tip 9b that contacts the photoreceptor drum 1. Therefore, the photosensitive drum 1 is not affected at all.

As is clear from the above description of the embodiments, the present invention provides a cleaning device for an electrophotographic copying machine, etc. by disposing a sealing film that comes into contact with the screw-shaped conveying member (au, guar 10). Since the vibration of the film is used to collect the toner, there is no need for a paddle for scraping off toner as in conventional devices, the number of parts is reduced, and the structure of the cleaning device is simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a known cleaning device, FIG. 2 is a schematic explanatory diagram of a noning device according to an embodiment of the present invention, and FIG. 3 is an enlarged side view of the same main part. DESCRIPTION OF SYMBOLS 1... Photoreceptor drum, 2... 1-link device, 3... Leaf spring, 4... Doctor blade, 5...
... Shaft, 6... Support plate, 7... Arm, 8... Tensile coil thread 1 length, 9... Seal film,
10...Auger, 11...Housing.

Claims (1)

[Claims] In a cleaning device such as an electrophotographic copying machine, there is a cleaning element that contacts the surface of a photoreceptor drum, a toner transport device that has a screw-like transport member, a central portion supported by a rigid body, and a photoreceptor on the negative side. a seal film stretched toward the drum side and whose other side is in contact with the toner conveying device, the conveying device applies vibration to the film, and the powdered toner on the film is moved by the vibration. A cleaning device characterized by being dropped into a conveying device.