JPH10129874A - Cleaning device for resist roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any deterioration in the cleaning effect of a cleaning blade from occurring by making any paper dust accumulated on a cleaning blade periodically eliminable. SOLUTION: In a cleaning device for cleaning a resist roller which feeds an imaging device with paper from a paper feeder, it is equipped with a cleaning blade 7 coming into contact with a peripheral surface of the resist roller 2 and eliminating any paper dust stuck fast to the resist roller 2, and a paper dust receiving member 6 supporting the cleaning blade 7 free of contact or separation to or from the resist roller 2, while receiving the paper dust removed out of this roller 2 by the cleaning blade 7, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a printer, and a facsimile, and more particularly, to a cleaning device for cleaning a registration roller for feeding a sheet from a sheet feeding device to an image forming device.

[0002]

2. Description of the Related Art An image forming apparatus is provided with a pair of registration rollers. The registration rollers feed a sheet from a sheet feeding device to an image forming apparatus. However, paper powder from the fed paper may adhere to and accumulate on the registration roller. The adhesion of the paper powder to the registration roller lowers the friction coefficient of the registration roller and causes a reduction in the sheet conveyance force. In addition, the paper powder attached to the registration roller moves onto the photoconductor,
This also causes an abnormal image.

[0003] For this reason, there have heretofore been proposed some devices provided with a cleaning device for removing paper dust adhering to the surface of the registration roller. As a typical cleaning device, there is a cleaning device in which a cleaning blade is brought into contact with the surface of a registration roller to scrape off paper dust on the roller as the registration roller rotates (see, for example, Japanese Patent Laid-Open No. 21386/1990).
No. 8, Japanese Utility Model Application Laid-Open No. 59-109351, Japanese Patent Laid-Open No. 59-13
No. 3566).

[0004]

However, in the conventional cleaning device using these cleaning blades, if the cleaning device is used for a long time, paper dust is deposited on the cleaning blade, and the cleaning effect is reduced. There was a problem. In particular, such a problem may occur in a short time when paper containing a large amount of paper dust is used continuously. A decrease in the cleaning effect reduces the conveyance force of the registration roller and causes an abnormal image.

[0005] Therefore, the present invention is to periodically remove the paper dust deposited on the cleaning blade,
An object of the present invention is to provide a registration roller cleaning device that solves the above-mentioned conventional problems.

Another object of the present invention is to provide a cleaning apparatus for a registration roller, which can remove paper dust on a cleaning blade without performing a special operation.

[0007]

According to a first aspect of the present invention, there is provided a cleaning apparatus for cleaning a registration roller for feeding a sheet from a paper feeder to an image forming apparatus. A cleaning blade that contacts a peripheral surface of the registration roller to remove paper dust attached to the registration roller; and a cleaning blade that supports the cleaning blade so as to be able to contact and separate from the registration roller. A paper dust receiving member for receiving the paper dust removed from the registration roller.

According to a second aspect of the present invention, the paper dust receiving member is operated in accordance with the movement of the paper guide plate, and the cleaning blade is separated from the registration roller.

According to a third aspect of the present invention, the paper dust receiving member is operated in accordance with opening and closing of a door of an image forming apparatus in which the paper dust receiving member is installed, and the cleaning blade is separated from the registration roller. .

According to a fourth aspect of the present invention, when the cleaning blade is separated from the registration roller,
A vibration is applied to the paper dust receiving member.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing a registration roller cleaning device according to a first embodiment of the present invention, and FIG. 2 is a perspective view thereof. The transfer paper 3 fed by a paper feeding device (not shown) is guided by the guide plates 4, 5 and 8 toward the registration roller pairs 1 and 2. When the leading end of the transfer paper 3 reaches between the pair of registration rollers 1 and 2, the transfer paper 3 is fed to the image forming apparatus (not shown) by the registration rollers 1 and 2 while forming an image with the photoconductor at a proper timing. Due to the repeated feeding of the transfer paper, paper dust 11 of the transfer paper adheres to the surface of the resist driven roller 2.

In FIG. 1, reference numeral 7 denotes a cleaning blade for scraping off paper dust 11 adhered to the surface of the resist driven roller 2. The tip of the cleaning blade 7 is pressed against the surface of the registration driven roller 2, and the registration driven roller 2 is driven to rotate, thereby removing paper dust attached to the surface. In this embodiment, the cleaning blade 7 is supported by the paper dust receiving member 6. The paper dust receiving member 6 is rotatably supported by the guide plate 4. The cleaning blade 7
By rotating the paper dust receiving member 6, the paper dust receiving member 6 is moved toward and away from the registration driven roller 2.

As shown in FIG. 2, the paper dust receiving member 6 is constantly pulled by a spring 12 in a direction in which the cleaning blade 7 is separated from the registration driven roller 2. An L-shaped operating rod 6 a is provided at one end of the paper dust receiving member 6, and its tip is in contact with the lower guide plate 5.
As a result, the paper dust receiving member 6 is in a state of resisting the force of the spring 12 and presses the cleaning blade 7 against the resist driven roller 2. When the resist driven roller 2 rotates in this state, the paper powder attached to the surface thereof is scraped off by the cleaning blade 7.

The lower guide plate 5 is rotatable about a fulcrum 13 so that when a paper jam or the like occurs, the fulcrum 1 is rotated.
3 is rotated downward. When freedom of the paper dust receiving member 6 is permitted by the rotation of the guide plate 5, the paper dust receiving member 6 is rotated by the spring 12, and the cleaning blade 7 is separated from the resist driven roller 2 and becomes almost upright. As a result, the paper dust deposited on the cleaning blade 7 falls into the paper dust receiving member 6. The above operation is
Each time a paper jam or the like occurs, the operation is automatically performed without the operator's awareness and paper dust is accumulated in the paper dust receiving member 6.

FIG. 3 is a perspective view of a cleaning device according to a second embodiment of the present invention. In this embodiment, the paper dust receiving member 6 includes an operating lever 6b instead of the operating rod 6a. The operating lever 6b extends substantially horizontally from the paper dust receiving member 6 and has a convex portion 14 provided inside the door of the image forming apparatus.
Is in contact with The tip of the convex portion 14 is an inclined surface,
The tip of the operating lever 6b is in contact with this. Therefore, by opening the door of the image forming apparatus, the operation lever 6b is opened.
And the projection 14 are disengaged. As a result, the paper dust receiving member 6 rotates, and the cleaning blade 7 separates from the registration driven roller 2. With this configuration,
Each time the door of the image forming apparatus is opened and closed, the paper dust accumulated on the cleaning blade 7 is removed.

FIG. 4 is a perspective view showing a third embodiment of the present invention. In this embodiment, a leg 6c is provided in addition to the configuration of the second embodiment. The leg 6 c is disposed substantially at the center of the rear of the paper dust receiving member 6, and its tip extends toward the guide plate 4. The leg 6c is provided with an operating lever 6b.
When the paper dust receiving member 6 is rotated by disengagement of the paper dust receiving member 6 from the convex portion 14, the paper dust receiving member 6 collides with the guide plate 4 and gives vibration to the paper dust receiving member 6. Due to the vibration applied to the paper dust receiving member 6, the paper dust deposited on the cleaning blade 7 effectively falls into the paper dust receiving member 6.

[0017]

As described above, the registration roller cleaning device according to the first aspect of the present invention supports the cleaning blade by the paper dust receiving member so as to be able to freely contact and separate from the registration roller, and removes the paper dust accumulated on the cleaning blade. Since it is accepted, there is an effect that the cleaning effect of the cleaning blade can be prevented from lowering.

According to a second aspect of the present invention, there is provided a registration roller cleaning device.
Since the contact and separation operation of the cleaning blade is performed in accordance with the movement of the paper guide plate, there is an effect that the above operation can be automatically realized at the time of paper jam or the like without performing a special operation. is there.

According to a third aspect of the present invention, there is provided a registration roller cleaning device.
Since the operation of contacting and separating the cleaning blade is performed with the opening and closing of the door of the image forming apparatus, there is an effect that the above operation is realized each time the door is opened and closed without performing a special operation.

According to a fourth aspect of the present invention, there is provided a cleaning device for a registration roller.
Vibration is applied to the paper dust receiving member when the cleaning blade is separated from the registration roller, so that the paper dust accumulated on the cleaning blade can be efficiently dropped into the paper dust receiving member. is there.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a registration roller cleaning device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is a perspective view of a registration roller cleaning device according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a registration roller cleaning device according to a third embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 registration driving roller 2 registration driven roller 3 transfer paper 4 upper guide plate 5 lower guide plate 6 paper dust receiving member 6a operating rod 6b operating lever 6c leg 7 cleaning blade 8,9 guide plate 10 developing device 11 paper dust 12 spring 13 Fulcrum 14 convex

Claims (4)

[Claims] 1. A cleaning device for cleaning a registration roller for feeding a sheet from a sheet feeding device to an image forming device,
A cleaning blade that contacts the peripheral surface of the registration roller and removes paper dust attached to the registration roller;
A cleaning device for a registration roller, comprising: a paper dust receiving member that supports the cleaning blade so that the cleaning blade can be freely moved toward and away from the registration roller, and that receives paper dust removed from the registration roller by the cleaning blade. . 2. The cleaning device for a registration roller according to claim 1, wherein the paper dust receiving member is operated in accordance with the movement of the guide plate of the paper, and the cleaning blade is separated from the registration roller. 3. The registration roller according to claim 1, wherein the paper dust receiving member is operated in accordance with opening and closing of a door of the image forming apparatus in which the paper dust receiving member is installed, and the cleaning blade is separated from the registration roller. Cleaning device. 4. The paper dust receiving member is vibrated when the cleaning blade is separated from the registration roller.
Cleaning device for any of the registration rollers.