JPS6283781A - Cleaning device - Google Patents

Abstract

PURPOSE:To suppress the distortion of a blade and to stabilize a cleaning performance by causing a pressuring plate to abut to a blade device and shifting the blade in the direction separated from the static latent image support, when the front side plate is bridged to the arm and turned toward the armoured body. CONSTITUTION:When handles 24 and 54 are grasped and attracted, a shifting mechanism 5, is turned in the (c) direction of an arrow relatively to an armoured body 2 with a supporting shaft 51 as a center. As such a result, the tip of a pressuring plate 55 pressures a pin 34, and against a spring 4, a blade device 3 is turned in the (b') direction of an arrow relatively to the armoured body 2 with a shaft 31 as a center. Then, when a cleaning device A is turned in the (a) direction of an arrow with a supporting shaft 21 of the armoured body 2 as a center, the inner surface of the upper part of a lock claw 56 of an arm 52 is abutted to a pin 6 provided with the device main body. Thus, the distortion will not occur excessively and the stable cleaning can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cleaning device for removing toner remaining on the surface of an electrostatic latent image carrier after transfer in an electrophotographic copying machine or the like.

(Prior Art) Conventionally, as one aspect of the cleaning device, one shown in FIGS. 3A to 3C has been proposed.

This cleaning device (A') roughly consists of an exterior body (2)
, a blade device (3), and a spring (4).

The exterior body (2) is attached to a support shaft (21) that is rotatably attached to a main body (not shown) of an apparatus such as an electrophotographic copying machine in parallel with the axis of the photoreceptor drum (1). (1
) and a cover (23) that connects the side plates (22), (22) located on both sides of the handle. .

The blade device (3) includes the side plates (22), (22)
A blade holding member (32) having a blade (33) on one side and a bottle (34) on the top is attached to a shaft (31) rotatably attached to the shaft (31).

The spring (4) is attached to a mounting part (23a) provided on the front part of the cover of the exterior body (2) and a bin (3) of the blade device (3).
4) and the blade device (3) is attached to the arrow (
(b) direction.

When the cleaning device (Ao) having the above configuration is rotated in the direction of arrow (a) by holding the first handle (24), first, as shown in FIG. 3b, the tip (
When the blade 33a) comes into contact with the surface of the photoreceptor drum (1) and further rotates in the direction of the arrow (a), the blade (33) is brought into pressure contact with the photoreceptor drum (1) and reaches the state shown in FIG. 3C. The cleaning device (Ao) is locked and set by a locking mechanism (not shown).

(Problems to be Solved by the Invention) However, in the cleaning device (Ao), from the state where the blade (33) is in contact with the photoreceptor drum (1) (the state shown in FIG. 3b), (1)
, since it is pressed from a direction approximately perpendicular to the tangent line,
The blade (33) may be pressed in a compressed state as shown in FIG. 4, or in some cases, the tip (33a) may be set in the opposite direction as shown in FIG.

Therefore, there are problems in that the blade (33) is excessively worn, the tip (33a) of the blade (33) is damaged, and the blade (33) is distorted, resulting in a decrease in cleaning performance.

Further, when the photosensitive drum (1) is pressed into contact with the state shown in FIG. 4, there is a problem in that a large load is applied to the drive source of the photosensitive drum (1).

(Means for Solving the Problems) The present invention has been made to solve the above problems and bring the blade into good pressure contact with the photoreceptor drum. A front side plate having a pressing plate is spanned over an arm pivotally supported by the side plate of the exterior body, and is rotatable by a predetermined angle, and when the front side plate is rotated toward the exterior body, the pressing plate comes into contact with the blade device, A moving mechanism is provided for moving the blade of the blade device in a direction away from the electrostatic latent image carrier.

(Example) Hereinafter, the present invention will be described based on drawings which are one example.

FIG. 1 shows a cleaning device (A) according to the present invention, and as is clear from the comparison with the conventional cleaning device (A) shown in FIGS. 3a to 3c, the conventional cleaning device (Ao) has a moving mechanism (5). is attached.

Note that the same members are given the same reference numerals and the description thereof will be omitted.

The moving mechanism (5) includes a front side plate (53) located outside the blade device (3) with respect to the exterior body (2).
and arms (52), (52) attached to both sides of the arm (52), (52).
Bearing (25) formed on the side plate (22), C22) of 2)
, (25) via a bottle (51) so as to be rotatable.

A second handle (54) is provided on the front side of the front side plate (53).
) is attached, and the blade device (3) is attached to the rear side.
It has a suppression plate (55) extending toward the pin (34).

The suppression plate (55) is inserted into a frame-shaped attachment part (23a) formed at the front of the exterior body (2), and the movement mechanism (5) is moved within an angle that allows the suppression plate (55) to rotate. It is designed to be able to rotate around the pin (5I).

Additionally, lock claws (56), (56) are formed at the tips of the arms (52), (52), and can be engaged with pins (6), (6) provided on the device body (not shown). It has become.

That is, as shown in FIG. 2a, in the moving mechanism (5), when the blade (33) is in pressure contact with the photosensitive drum (1), the tip of the suppressing plate (55) is separated from the pin (34). At the same time, the lock claw (56) is engaged with the bottle (6).

Therefore, when the moving mechanism (5) is rotated in the direction of the arrow (C) while holding the handle (54) while leaving the exterior body (2) as it is, the tip of the suppression plate (55) will touch the pin (34). The blade device (3) is rotated in the direction of the arrow (bo) about the shaft (31).

As a result, the blade (33) is separated from the photoreceptor drum (1), and the lock claw (56) is disengaged from the pin (6).

Hereinafter, the mounting operation of the cleaning device (A) having the above configuration will be explained.

First, as shown in Figure 2d, the cleaning device (A)
Suppose that it is in a released state.

In this state, the blade device (3) is attached to the spring (4)
The tip of the pressing plate (55) of the moving mechanism (5) is pressed against the blade device (3).
The tip of the pin (34) is in contact with the tip of the pin (34).

Next, when the handles (24) and (54) are grasped and pulled together, the moving mechanism (5) moves to the support shaft (51) as shown in FIG. 2C.
) relative to the exterior body (2) in the direction of arrow (C).

As a result, the tip of the suppression plate (55) presses the pin (34), and the blade device (3) is moved relative to the exterior body (2) around the shaft (31) against the spring (4). It rotates in the direction of the arrow (bo).

Therefore, as shown in Fig. 2b, the supporting shaft (
21), when the cleaning device (A) is rotated in the direction of the arrow (a), the upper inner surface of the lock claw (56) of the arm (52) comes into contact with the pin (6) provided on the main body of the device (second b). figure).

Thereafter, when the handles (24) and (54) are released, the tension force of the spring (4) causes the blade device (3) to rotate in the direction of the arrow (b), and the blade (33) to be in the state shown in FIG. 1a. comes into pressure contact with the photoreceptor drum (1).

At this time, the tip (33a) of the blade (33) comes into pressure contact with the surface of the photoreceptor drum (1) from the tangential direction, and is set in a normal state.

For this reason, the blade (33) is compressed or the tip (33) of the blade (33) is compressed, as shown in FIGS. 4 and 5.
a) is not pressed in the opposite direction.

At the same time, the moving mechanism (5) rotates in the direction of the arrow (Co) and the lock claw (56) completely engages the pin (6), so that from this state the cleaning device (A) can be directly moved in the direction of the arrow (a).
) direction cannot be rotated.

In addition, when canceling the cleaning device (A), the second
From the state shown in Figure a, grasp the handles (24) and (54) and first move the moving mechanism (5) relative to the exterior body (2).
) in the direction of arrow (C), the engagement between the lock claw (56) and the pin (6) is released, and the suppression plate (5
5) presses the pin (34) of the blade device (3), thereby rotating the blade device (3) in the direction of the arrow (bo) and releasing the pressure contact of the blade (33) against the photoreceptor drum (1). do.

Thereafter, as shown in FIGS. 2c and 2d, the cleaning device (A) rotates in the direction of the arrow (ao).

(Effects of the Invention) As is clear from the above description, the cleaning device according to the present invention can be used in a conventional cleaning device, after the blade is once set in a normal state with respect to the electrostatic latent image carrier.
The configuration includes a moving mechanism that presses the contact from approximately the tangential direction.

Therefore, the blade is not pressed against the electrostatic latent image carrier in a compressed state or in a reversely oriented state.

Therefore, the blade has little wear and does not break, so it can be used for a long period of time.

In addition, since the blade is used in normal pressure contact, stable cleaning can be performed without excessive distortion, and there is no need to place an excessive burden on the drive source of the electrostatic latent image carrier. There is no.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the cleaning device, Figs. 2a to 2d are sectional views showing the operating state of the cleaning device according to the present invention, and Figs. 3a to 3C show the operating state of the conventional cleaning device. The cross-sectional views, FIGS. 4 and 5, are cross-sectional views showing the state in which the blades are pressed together. A, A'...Cleaning device, 1...Photoconductor drum, 2...Exterior body, 3...Blade device, 4...
- Spring, 5... Moving mechanism, 6... Engaging pin, 21... Support shaft, 22... Cover, 22... Side plate, 24.54... Handle, 33... Blade, 52
...Arm, 53...Front side plate. Patent applicant Minolta Camera Co., Ltd. Agent
Person Patent attorney Aoyama Ao and 2 others Figure 20 Shin 78: O 2all Figure 2b Figure 2d [F]

Claims (1)

[Claims] (1) A cleaning device for an electrophotographic copying machine or the like that removes toner remaining on the surface of the electrostatic latent image carrier after transferring the toner image formed on the surface of the electrostatic latent image carrier to transfer paper. an exterior body which connects side plates located at both ends in the axial direction of the electrostatic latent image carrier with a cover and is rotatably attached to the main body of the apparatus such as the electrophotographic copying machine via a shaft; and a toner removing body. a blade device having a blade and rotatably attached to the inner side of both side plates of the exterior body via a shaft; and a blade device that is stretched between the blade device and the exterior body, and the tip of the blade is rotated about the shaft. A front side plate having a spring biased toward the electrostatic latent image carrier and a pressing plate facing the blade device is mounted on an arm rotatably supported on the side plate of the exterior body. A cleaning device comprising: a moving mechanism that causes the pressing plate to come into contact with a blade device when rotated, and rotate the blade of the blade device in a direction away from the electrostatic latent image carrier.