JPH0336431B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming body cleaning device for a recording device such as an electrophotographic recording device, and in particular to an image forming body cleaning device for cleaning an image forming body by scraping off residual toner on the image forming body. The present invention relates to an improvement in a cleaning device that scrapes off onto a roller, is conveyed by a conveyance roller, and is dropped into a storage section or a collection section.

[Prior art]

As the above-mentioned cleaning device, the first
The structure shown in the figure is common.

In FIG. 1, 1 is an image forming drum having an image forming layer such as an electrophotographic photoreceptor layer or a dielectric layer on its surface and rotates in the direction of the arrow, 2 is a cleaning device frame, and 3 is a cleaning device frame 2. On the other hand, a scraping member 6 is held by a holding frame 5 which is rotatably mounted around a shaft 4, and is made of a rubber plate or a resin plate, the tip of which is pressed against the surface of the image forming drum 1. A conveyance roller 7 rotates in the direction of the arrow to receive the residual toner scraped off from the surface of the image forming drum 1 by the scraping member 3 and convey it away from the surface of the image forming body drum 1. This separation member is made of a resin plate made of polyester or the like and separates the toner from the surface of the conveyance roller 6 by contacting the surface of the conveyance roller 6, and causes the toner to fall into the toner reservoir 2a, which is a toner storage section or collection section.

A conventional cleaning device with such a configuration is
The conveying roller 6 has an elastic surface layer 6a made of an elastic material such as rubber with a smooth surface.
In order to prevent toner from spilling between the transport roller 6 and the image forming drum 1, the transport roller 6 is brought close to the surface of the image forming drum 1, and foreign matter such as dust or paper powder is removed between the transport roller 6 and the image forming drum 1. This is to prevent the surface of the image forming member drum 1 from being damaged even if it is caught in the conveyor roller 6.
This is to improve the toner transportability on the surface. However, even though this improves the conveyance performance, since the surface of the elastic surface layer 6a is smooth, the toner may slip and the toner may fall onto the area where the conveyance roller 6 and the image forming drum 1 are close to each other. There is a problem that it is easy to accumulate. One of the specific problems caused by this toner accumulation is that the conveyance roller 6
If a dam or a member for preventing toner from spilling is not provided at the end of the toner, there is a problem that toner may spill from the end. If a dam such as a flange or a separate dam such as a malt plane is provided at the end of the transport roller 6, they will provide resistance to the rotation of the transport roller 6. It becomes difficult to rotate the image forming member 1 in accordance with the rotation of the image forming member drum 1, and there arises a problem that such dams and members are easily worn out.

[Purpose of the invention]

The present invention has been made in order to solve the problem that toner tends to spill from the end of the conveyance roller in a cleaning device as described above. To provide a cleaning device that prevents toner from spilling from an end without providing a cleaning device.

[Structure of the invention]

The present invention provides a cleaning device in which residual toner on an image forming body is scraped off onto a conveyance roller by a scraping member, and the residual toner is conveyed by the conveyance roller and dropped into a storage section or a collection section. The present invention is a cleaning device characterized by having a roughened surface, that is, the above-mentioned object is achieved by a simple structure in which the surfaces of both end portions of the conveyance roller are roughened.

〔Example〕

The present invention will be described below with reference to FIGS. 1 to 3.

The cleaning device of the present invention has a second conveyor roller 6 in the cleaning device as shown in FIG.
A conveyance roller 6 as shown in the figure or FIG. 3 is used.

The conveyance roller 6 shown in FIG. 2 has an elastic surface layer 6a made of an elastic material such as rubber, and grooves parallel to the axial direction are provided on the surface of both end portions, and the surfaces of both end portions are made into knurled rough surfaces 6b. The conveyance roller 6 shown in FIG. 3 has a metal surface layer 6c made of a metal such as aluminum in the center, and a sponge surface layer with holes distributed on the surface at both ends to form a rough surface 6b. .

In this way, the rough surfaces 6b are formed on both ends of the conveyance roller 6.
By providing the toner, the toner transportability at both end portions is significantly improved, and toner does not accumulate in the vicinity of the image forming body drum 1, thereby preventing toner from spilling from the end portions. It disappears. The elastic surface layer 6a at the center of the conveyance roller 6 in FIG. 2 may be replaced with a metal surface layer 6c as in the conveyance roller 6 in FIG. In the case of a device that can be actively rotated, the rough surface 6b may also be a metal surface. Furthermore, it goes without saying that the metal surface layer 6c of the conveyance roller 6 shown in FIG. 3 may be replaced by the elastic surface layer 6a. The surface of the central portion and the rough surface 6b are not limited to materials.

As the separating member 7 for separating the toner from the surface of the conveying roller 6, a member similar to the separating member 7 of a conventional cleaning device may be used, but the part that contacts the rough surface 6b is It is preferable that the thickness be thin so that it can be easily elastically deformed along the rough surface 6b. The thickness of the part of the separation member 7 that comes into contact with the center part of the conveyance roller 6 is
When we used a polyester plate with a thickness of 250 μm and a thickness of 100 μm at the portions that contact the rough surfaces 6b at both ends, the central portion of the conveyance roller 6 also had a rough surface 6b.
A good result was obtained in which the toner was sufficiently separated in the portion shown in FIG.

〔Effect of the invention〕

According to the present invention, the problem of toner spilling from the ends of the conveyance roller, which was observed in conventional cleaning devices, can be solved by simply making the surfaces of both ends of the conveyance roller rough. You can get the same effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a cleaning device to which the present invention relates, and FIGS. 2 and 3 are front views of a conveying roller used in the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Formation drum, 2... Cleaning device frame, 3... Scraping member, 4... Shaft, 5... Holding frame, 6... Conveyance roller, 6a... Elastic surface layer, 6b
...Rough surface, 6c...Metal surface layer, 7...Separation member.

Claims (1)

[Scope of Claims] 1. In a cleaning device in which residual toner on an image forming body is scraped off onto a conveyance roller by a scraping member, and the toner is conveyed by the conveyance roller and falls into a storage section or a collection section, the toner of the conveyance roller is A cleaning device characterized by having roughened surfaces at both ends. 2. The cleaning device according to claim 1, wherein the rough surfaces at both end portions of the conveyance roller are grooves in the axial direction. 3. The cleaning device according to claim 1, wherein the rough surfaces at both end portions of the conveying roller are caused by different surface materials of the roller.