JPS60100168A - Cleaning device of electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To prevent insufficient cleaning with certainty by absorbing vibration of a photosensitive drum and movement due to its imperfect circularity and maintaining the distance between the drum and a cleaning roll constant. CONSTITUTION:A supporting block 4 is energized counterclockwise on a supporting shaft 5 as a center by the resultant force of a coil spring 15 for energizing a pressing member 12 and a plate spring 10 at the time of copying. A tracking roll 7 is pressed into contact with the surface of a photosensitive drum 1 with a prescribed pressure, and even if there are vibration of the drum 1 and movement due to imperfect circularity, these are absorbed by the springs 15, 10. Therefore, the distance between the drum 1 and the roll 6 is always maintained constant. At the time of suspension of copying, all the housing 3 is turned clockwise around the shaft 5 by moving a toggle clamp 13 in the unclamping direction with a driving means 14, and the roll 7 is released from the surface of the drum 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a cleaning device for an electronic copying machine that is improved so as to maintain a constant distance between a photoreceptor and a cleaning roll.

Prior Art In a conventional cleaning device for an electronic copying machine using a cleaning roll, tracking rolls are provided at both ends of the cleaning roll in contact with the photoconductor, and the distance between the photoconductor and the cleaning roll is kept constant by the tracking rolls. However, with this method, the distance between the photoconductor and the cleaning roll must be maintained at all times due to vibrations when the photoconductor rotates, poor roundness of the photoconductor, wear of the contact area between the photoconductor and the tracking roll, etc. There was a problem in that it could not be maintained constant, resulting in poor cleaning.

Purpose of the Invention This invention was made with the aim of improving the above-mentioned problems, and it is an electronic device that absorbs vibrations and poor roundness of the photoreceptor and maintains a constant distance between the photoreceptor and the cleaning roll at all times. An object of the present invention is to provide a cleaning device for a copying machine to prevent cleaning failures from occurring.

Constituent structure of the invention Rotatably supported on a support shaft near the photoreceptor.
A clamp is provided at the opening of the housing on the photoreceptor side.
A cleaning roller for cleaning untransferred toner remaining on the surface of the photoconductor and a tracking roll for maintaining a constant distance between the cleaning roll and the photoconductor are provided in contact with the surface of the photoconductor. At the same time, the tracking roll is pressed against the photoconductor with a constant pressure by applying force to the photoconductor side by the leaf spring.
A cleaning device for electronic copying, in which vibration and roundness defects of a photoreceptor are absorbed by the coil spring and leaf spring.

Embodiment One embodiment of this invention will be described in detail below with reference to the drawings.
In the figure, 1 is the photoreceptor of a 2-rotation 1a photocopying machine,
A cleaning device main body 2 is installed around the photoreceptor 1 . The cleaning device main body 2 is a photoreceptor Iτ
It has a housing 3 with an opening at 11 and a support block 4 that supports this, and one end of the support block 4 is open.
lI is rotatably supported by a support shaft 5. A cleaning roll 6 such as a magnetic roll is rotatably supported on the opening side of the housing 3 in the vicinity of the photoreceptor 1.
+ 6α is located on both ends of Krim=/Groll 6,
The tracking roll 7 is placed in contact with the circumferential surface of the photoreceptor 1.
These tracking rolls 7 maintain a constant distance between the photoreceptor 1 and the cleaning roll 6. The cleaning roll 6 uses a magnetic brush (not shown) attached to the surface of the photoconductor 1 to remove untransferred toner remaining on the surface of the photoconductor 1 after the transfer process from the surface of the photoconductor 1. The untransferred toner removed from the surface of the photoreceptor 1 is transferred to the housing 3.
After being adsorbed by a scavengin crawler 8 provided therein, it is scraped off by a scraper ga, and carried out of the housing 3 by a conveying means 9 such as an auger to be reused.

On the other hand, a leaf spring 1o is provided on the support block 4, with one end fixed to the vicinity of the support shaft 5. The above leaf spring 10
The other end side extends in the opposite direction to the support shaft 5, and a support rod II is brought into contact with the tip end from above. The support rod 11 is parallel to the support shaft 5 and supported so as to be swingable in the vertical direction, and is pressed downward by a suppressor +2 attached to the toggle clamp 13. The toggle clamp has a pair of inverted levers I3 on which the bending part is supported.
α, 13b, and a link 13C that supports the bent portion of one lever I3α.

The other end of the lever 13α is rotated in the vertical direction by an m-movement means 14 such as a rotary lens to perform clamping and unclamping, and the other end of the lever 13b is pressed as described above. The upper end of the child 12 is engaged. Also, the lever 13b and the head 12c formed at the bottom of the presser 12
Between L is a coil spring 1 that biases the suppressor 12 downward.
5, and the support rod 11 is fitted into a V-shaped groove 12b formed on the lower surface of the head 12α.

Effects of the Invention Since the present invention has been described in detail above, during copying, the support block is moved by the combined force of the coil spring 15 that urges the presser 12 and the leaf spring 10 that abuts the presser 12 via the support rod 11. 4 is urged counterclockwise around the support shaft 5 to press the tracking roll 7 against the surface of the photoreceptor 1 with a predetermined pressure, so even if there is IK runout or poor roundness of the photoreceptor, , this is absorbed by the coil spring 15 and leaf spring 10. As a result, the distance between the photoreceptor 1 and the cleaning roll 6 is always maintained constant, so there is no risk of cleaning defects occurring, and the distance between the tracking roll 6 and the photoreceptor due to cracks or poor roundness of the photoreceptor 1 Since excessive surface pressure is not generated on the contact portion 1, wear of this portion can also be reduced.

In addition, when copying is stopped, the sitoglu clamp 13 is
By moving the housing 3 in the unclamping direction, the entire housing 3 is rotated clockwise around the support shaft 5, as shown in FIG.

Since the tracking roll 6 is spaced apart from the surface of the photoreceptor 10, it rotates twice]' This can be easily implemented even in copying machines where the cleaning roll 6 has to be moved away from the photoreceptor 1 frequently, such as FHL photocopiers. As well as toggle clamp 13
By employing this, it is not necessary to constantly energize the sliding means 14 and press the tracking roll 7 against the photoreceptor 1 during copying, so that it is possible to save electricity.

In the above embodiment, the rotary solenoid is driven by the drive means 14.
I use it to automatically synchronize the copying cycle, IJ-Jung time and non-cleaning time, but 2 rotations 1v
If the copying machine is not an i-type copying machine, the driving means 14 is not provided.
Manually operate the toggle clamp 13, and the photoconductor +! ! 9
If the cleaning roll 6 is set to 1 [1], the photoreceptor 1 can be easily pulled out, and maintenance and inspection of the copying machine can be easily performed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view, and FIG. 2 is a view taken from the direction of FIG. FIG. 3 is an explanatory diagram of the operation. 1 is a photoreceptor, 3 is a housing, 5 is a support, 6 is a cleaning roll, 7 is a tracking roll, 10 is a leaf spring, and 15 is a coil spring. Applicant Fuji Xerox Co., Ltd. Agent Patent attorney Masaaki Yonehara Patent attorney Tadashi Hamamoto 2nd day 3 accounts + 1

Claims (1)

[Claims] A housing 3 whose upper portion is supported by a support shaft 5 is provided near the photoreceptor 1, and untransferred toner remaining on the surface of the photoreceptor 1 is collected at an opening on the photoreceptor 1 side of the housing 3. The cleaning roll 6 is in contact with the photoreceptor 1, and the photoreceptor 1
A tracking roll 7 is provided to keep the distance between the cleaning roll 6 and the cleaning roll 6 constant.
The upper part of the opposite side of the support IiI+5 is biased toward the photoreceptor 1 side through a coil spring 15 and a leaf spring 10.