JPS6159469A - Cleaning device of electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To prevent toner from being accumulated on a sheet material for recovery and prevent the inside of the copying machine from being stained with toner by oscillating the recovery sheet material at a conveyance anger side through the rotation of a conveyance auger. CONSTITUTION:A housing 2 adjoining to a photosensitive body 1 is provided with a cleaning member 3 and a bracket 4 and the recovery sheet material consists of a film sheet 5 and a 'Mylar(R)' film 7. The 'Mylar(R)' film 7 is oscillated through the rotation of the conveyance auger 6, and untransferred toner on the photosensitive body 1 which is scrapped off with a cleaning member 3 slides down onto the conveyance auger 6 smoothly without being accumulated on the 'Mylar(R)' film 7 and conveyed from the toner discharge port of the housing 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cleaning device for cleaning an electrophotographic copying machine by scraping off untransferred toner on a photoreceptor with a cleaning member such as a blade. As shown in FIG. 4, a cleaning member 3 such as a blade is provided in a housing 2 adjacent to a drum-shaped photoreceptor 1 so as to be in contact with the photoreceptor 1, and a bracket 4 fixed in the housing 2 is Along with providing a film seal 5,
A conveying auger 6 is provided at the bottom of the nousing 2, and the untransferred toner on the photoreceptor 1 scraped off by the cleaning member 3 is sent to the conveying auger 6 by a film seal 5.
The cleaning device is configured to be transported to the outside of the A housing 2 using the transport auger 6.

Problems to be Solved by the Invention When the angle θ between the film seal 5 and the horizontal that collects untransferred toner is small, that is, when the inclination angle is small or when the toner fluidity is poor, the cleaning member 3 is used to scrape the toner. The dropped toner does not smoothly slide down to the conveying auger 6 along the film seal 5, and the toner is deposited on the film seal 5 as shown by the imaginary line in FIG.

As a result, toner blocking occurs during high humidity, cleaning failure occurs when toner builds up to the tip of the cleaning member 3, and the cleaning member 3 and film seal 5 are removed from the photoreceptor 1 when the copying machine is stopped. If it is desired to separate the toner from the cleaning member 3 and the film seal 5, the accumulated toner may spill from the gap between the cleaning member 3 and the film seal 5 and stain the inside of the copying machine.

Means and Effects for Solving Problems The conveyance auger side of the recovery sheet material that conveys the scraped toner to the conveyance auger has a comb-teeth shape with a pitch of one pitch or less of the conveyance auger, and the conveyance auger Embodiment 1 FIG. 1 is an overall sectional view, in which a housing 2 adjacent to a photoreceptor 1, a cleaning member 3 and a bracket 4 are provided. The bracket 4 includes a pair of vertical pieces 4α, 4α and a horizontal piece 4h, and a film seal 5 is fixed to the lower surface of the horizontal piece 4h toward the photoreceptor 1, and a comb tooth is provided on the upper surface. A mylar film 7 having a shape of
The collection sheet material is made up of:

A large number of slits 8 are formed in the mylar film 7 at a pitch α that is intermediate to one pitch b of the conveying auger 6, and the slits 8 form a comb-like shape, and interfere with the conveying auger 6 to utilize its rotation. It is designed to vibrate.

Because of this, the Mylar film 7 vibrates due to the rotation of the conveying auger 6, so the cleaning member 3
The untransferred toner scraped off on the photoreceptor 1 does not accumulate on the Mylar film 7, but smoothly slides onto the conveying auger 6 and is conveyed through the toner discharge port 9 of the housing 2.

Note that the film seal 5 is attached to the photoreceptor 1 and the conveying auger 6.
It is also possible to form a comb-teeth shape with a pitch equal to or less than 1 pitch h of the conveying auger 6 by forming slits on the side of the conveying auger 6.

In other words, the portion of the recovery sheet material on the conveyance auger 6 side that sends the untransferred toner on the photoreceptor 1 scraped off by the cleaning member 3 to the conveyance auger 6 is arranged at a pitch smaller than one pitch of the conveyance auger 6. It may be comb-shaped.

Effects of the Invention Since the conveyance auger 6 side of the recovery sheet material vibrates due to the rotation of the conveyance auger 6, the conveyance auger 6 side of the recovery sheet material vibrates smoothly without toner accumulating on the recovery sheet material.
can be sent to.

Therefore, toner blocking may occur during high humidity,
Toner does not accumulate on the cleaning member 3, resulting in poor cleaning, and the toner does not fall into the copying machine even if the cleaning member 3 and the collection sheet material are separated from the photoreceptor 1, so the interior of the copying machine is not contaminated with toner. There is no.

[Brief explanation of drawings]

Figures 1 to 3 show embodiments of the present invention, Figure 1 is an overall sectional view, Figure 2 is an enlarged view of main parts, Figure 3 is a plan view of Figure 2, and Figure 4 is a conventional example. FIG. 1 is a photoreceptor, 2 is a housing, 3 is a cleaning member,
4 is a bracket, 5 is a film sheet, 6 is a conveyance auger, 7 is mylar film O

Claims (1)

[Claims] In the cleaning device, the untransferred toner on the photoreceptor 1 is scraped off by the cleaning member 3, and the toner is sent to the conveyance auger 6 by a recovery sheet material, and the toner is conveyed by the conveyance auger 6. A cleaning device for an electrophotographic copying machine, characterized in that the conveying auger side of the sheet material has a comb-teeth shape with a pitch of one pitch or less of the conveying auger 6, and interferes with the conveying auger 6.