JPS59208568A - Cleaner of photosensitive body of electrophotographic copying machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a photoreceptor cleaning device for an electrophotographic copying machine.

(Prior Art) When cleaning the toner remaining on the photoreceptor of a conventional electrophotographic copying machine by the trailing method, as shown in FIG. is pivotally attached to the surface of the photoreceptor drum 1 so as to be able to swing, a base of one thin metal plate 80 is fixed to the tip thereof, a blade member 4 made of rubber or the like is fixed to the tip of the thin metal plate 8, The arm 2 is pulled by the spring 5 and the blade member 4
was in contact with the surface of photoreceptor drum 1 with a constant pressure,
The contact point between the blade member 4 and the surface of the photoreceptor drum 1 receives a tangential force due to the rotation of the photoreceptor drum l, and the metal thin plate 8 curves and moves from P to P2, and the tangent at each contact point and Since the angle with the blade member 4 changes from θ1 to 02, the cleaning ability decreases.

(Purpose) When cleaning a photoreceptor using a trailing method, the present invention provides cleaning performance by keeping the contact angle between the tip of the blade and the photoreceptor constant even if the blade is displaced by frictional force in the direction of movement of the photoreceptor. The purpose is to prevent a decline in

(Structure) The structure of the present invention will be described below based on an embodiment shown in FIGS. 2 and 3. 1'0.11 is two trailing plates arranged in parallel at regular intervals, their tips are connected together, the base is fixed to the tip of the arm 12, and one of the trailing plates 10 has a cleaning performance such as rubber. The blade 13 is joined, and its tip protrudes by a certain length l from the trailing plate lO. Arm 12
is pivotally attached to the surface of the photoconductor 1 about a shaft 14 at its lower end, and is pulled by a spring 15 to bring the edge portion 18α of the blade 18 into contact with the surface of the photoconductor 1 with a predetermined pressure. The angle θ between the contact point P and the upstream end side surface 13b of the blade 13 is set to θ on the uncleaned side. In other words, it is a trailing type.

Next, the effect will be explained. When the photoreceptor 1 rotates, the contact point P between the blade 18 and the photoreceptor 1 receives a force in the tangential direction due to frictional force due to the rotation of the photoreceptor l.
．． Since the blade 11 is U-shaped, it has high flexural rigidity, and since the blade 18 is only connected to one of the trailing plates 10, the force acting on the tip of the blade 18 is mostly due to the U-shaped trailing plate 10°11.
Since the free end length l of the blade 18 is small, the free end of the blade 13 moves in parallel from the state shown in FIG. 2 to the state shown in FIG. 8, so that the edge portion of the blade 18 Point P where 13a contacts photoreceptor 1
The angle θ' formed between the tangent line of ' and the side surface of the upstream end of the blade 13 remains almost unchanged.

FIG. 4 shows a second embodiment of the present invention, in which a foamed rubber 17 is inserted between parallel trailing plates 10 and 11.

In addition, instead of bending one metal plate to form two parallel companion plates with connected tips, we glue and weld square metal bars to the tips of the two metal plates to form two parallel plates with connected tips. Parallel guide plates may be formed, and a flexible member such as rubber may be used instead of metal or square metal bars.

(Effects) According to the present invention, the blade that is in contact with the photoconductor is joined to one of the two trailing plates whose tips are connected and arranged in parallel and whose bases are fixed to the arm, and the tip thereof protrudes. Therefore, even if the tip of the blade is pulled due to the movement of the photoconductor, it will move in parallel, and the contact angle with the photoconductor will be constant, so cleaning performance will not deteriorate, the structure is simple and easy to manufacture, and the life of the blade will be shortened. can be increased.

[Brief explanation of drawings]

Fig. 1 is a front view of the conventional device, Fig. 2 is a front view of the embodiment of the present invention when the photoconductor is stopped, and Fig. 8 is a front view of the photoreceptor when it is stopped. ...Spring, P, P
'...Contact point between blade and photoreceptor, θ, θ'...
The angle between the tangent at contact points P and P' and the side surface of the blade. Patent applicant Ricoh Co., Ltd. Figure 1 I Figure 3 Figure 2 4 Figure 4 I

Claims (1)

[Claims] Two trailing plates are arranged parallel to each other at regular intervals, the tips are connected together, the base is fixed to the arm, a blade is joined to one of the trailing plates, and the tip is connected to the arm from the trailing plate. The protruding edge part contacts the surface of the photoreceptor with a predetermined pressure, and the angle θ between the tangent at the contact point and the side surface of the upstream tip of the blade is θ on the uncleaned side. Photoconductor cleaning device for photocopying machine 2.