JPH02148080A - Paper powder eliminating device - Google Patents

Abstract

PURPOSE:To maintain the carrying path in a clean state without bringing the roller surface of an elastic member into contact by attaching a paper powder eliminating device to a developing device, separating it in the radial direction of the carrying roller at the time of movement of the developing device and replacing the elastic member to which paper powder adheres. CONSTITUTION:As for a paper powder eliminating device 36 for eliminating paper powder adhering to a carrying roller 24 by an elastic member 44 and preventing the contamination of a photosensitive drum 12, it is necessary to replace the member once in a while. Therefore, the device 36 is attached to a developing device 14 separated from the drum 12 in order to execute an inspection once in a while, so that the member 44 is separated in the radial direction of the roller 24 at the time of separation of the device 14. In this state, when the member 44 is replaced with a new article along a dovetail groove 40 from a supporting member 38 together with a rail member 42, the replacement can be executed without scattering paper powder onto a carrying path of a copy form.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper dust removal device, and more particularly, to a paper dust removal device for removing paper dust attached to the surface of a paper conveyance roller disposed upstream of a photoreceptor drum in an image forming device or the like. This invention relates to a paper dust removal device for removing paper dust.

[Prior art]

The paper dust removing device is mainly disposed on a conveyance roller upstream of a photoreceptor drum of an image forming apparatus. A paper dust removing device usually includes a support member fixed to the main body of an image forming apparatus and a sponge member detachably attached to the support member.

FIG. 6 is an explanatory diagram of a conventional paper dust removal device.

As shown in FIG. 6, a support panel 73 and a pair of transport rollers 75 and 77 are arranged on the transport path of the paper 71. Above the support panel 73 is a support member 7 of the paper dust removal device.
9 is arranged, and the support member 79 is fixed to the machine frame of the main body (not shown).

A dovetail groove 81 is formed in the support member 79 toward the axial direction of the conveyance roller 75, and a rail portion of a paper powder material 83 is inserted through the dovetail groove 81. The upper part of the paper powder light material 83 has a U-shaped cross section, and the paper powder light material has a sponge member 8 on the side surface of the material 83.
5 is attached. The sponge member 85 presses against the surface of the conveyance roller 75 and removes paper dust attached to the conveyance roller 75 through sliding contact.

[Problem that the invention seeks to solve]

By the way, in such a conventional paper dust removal device, the sponge member 85 may be replaced during maintenance or inspection of the image forming device. Particularly in recent high-speed copying machines, the sponge member 85 is frequently replaced.

However, the sponge member 85 is replaced by pulling out the rail portion of the paper powder catcher material 83 from the dovetail groove 81. Therefore, when replacing the sponge member 85, the sponge member 85 is removed while being in sliding contact with the surface of the conveying roller 75 in the axial direction on the conveying path, and paper powder is not scattered on the conveying path. Such paper dust on the conveyance path contaminates the photosensitive drum at the subsequent stage, causing problems such as image defects.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a paper dust removal device that maintains a conveyance path clean without scattering paper dust on the conveyance path when replacing an elastic member. It is said that

[Means for solving problems]

In order to achieve the above object, the present invention comprises a support member and an elastic member attached to the support member and removably provided, and the elastic member is arranged so as to be pressed against the surface of a conveying roller that conveys paper toward a photosensitive drum. , a paper dust removing device for removing paper dust from paper adhering to the conveyance roller surface, the paper dust removing device according to the present invention includes a developing device main body that is provided so as to be separable from the surface of the photoreceptor drum. A supporting member is attached or formed, and the elastic member attached to the supporting member is disposed so as to be separated from the conveying roller surface in the radial direction when the developing device main body is moved away from the photoreceptor drum. Features.

[Effect]

According to the paper dust removal device according to the present invention, paper dust adhering to the surface of the conveying roller is removed by the elastic member, thereby preventing contamination of the photoreceptor drum. Since the elastic member presses against the conveying roller surface, it is necessary to replace it from time to time.

Further, the developing device is usually separated from the photosensitive drum during maintenance and inspection, and the toner and the like are inspected.

In the present invention, a paper dust removing device is attached to the developing device, and when replacing the elastic member, the developing device is first separated from the photosensitive drum. As a result, the elastic member also separates from the conveying roller surface. In this case, the elastic member moves away in the radial direction of the conveyance roller, and therefore does not come into sliding contact with the surface of the conveyance roller. Furthermore, the separated elastic member also leaves the paper conveyance path.

In this state, the elastic member is removed from the support member and replaced with a new elastic member. After replacement, the developing device is again moved towards the photosensitive drum and brought into contact with it. At this time,
The new elastic member comes into contact with the conveying roller surface and presses the conveying roller surface.

Therefore, the elastic member can be replaced outside the conveyance path without slidingly contacting the conveyance roller surface. Further, unlike the conventional method, since the elastic member is brought into sliding contact with the conveyance roller surface in the axial direction on the paper conveyance path and is not removed, the conveyance path is not contaminated.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the paper dust removal device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram of the interior of an image forming apparatus equipped with a paper dust removing device according to the present invention. As shown in FIG. 1, a photosensitive drum 12 is attached to a machine frame 10 (dotted chain line in FIG. 1) of an image forming apparatus.

Around the photoreceptor drum 12, a developing device 14 and a transfer section 1 are installed.
6. A static eliminating/cleaning section 18 is provided.

The copy paper is guided by guide rollers 20.21, guide plates 22.23,
and conveyance rollers 24 and 25, and are conveyed to the transfer section 16. A toner image is transferred to the copy paper in the transfer section 16,
The image is sent to a fixing device (not shown) via the conveyor belt 26. Therefore, the guide rollers 20.21, the guide plates 22.23,
The conveyance rollers 24, 25 and the conveyance belt 26 form a conveyance path for the copy paper.

A developer supply device 28 is attached to the upper part of the main body of the developing device 14 so as to be able to be separated upwardly (in the direction of arrow A in FIG. 1).
Toner is injected into the developer supply device 28 . A developing roll 3° is provided in the developing device 14, and the developing roll 3o
supplies toner to the surface of the photoreceptor drum 12. A support stand 32 is attached to the lower surface of the developing device 14.
2 is arranged so that its lower surface slides on the bottom surface 10A of the machine frame 10. The developing device 14 is connected to the developer supply device 2.
When 8 is separated upward, it can slide together with the machine frame 10 in the direction of arrow C as shown in FIG. 3, and can further slide on the machine frame surface 10A in the direction of arrow B shown in FIG. The sliding developing device 14 is connected to the processing box 34 with the lower opening 33 opened as shown in FIG.

Further, a paper powder removing device 36 according to the present invention is attached to the side surface of the support base 32. As shown in FIGS. 4 and 5, the support member 38 of the paper dust removal device 36 is fixed to the side surface of the support base 32, and a dovetail groove 40 is formed on the surface facing the conveyance roller 24 and along the axial direction thereof. ing. A rail member 42 is inserted into the dovetail groove 40, and the rail member 42 is connected to the support member 38.
It is provided so that it can be attached and detached from.

A sponge member 44 is attached to the rail member 42. The sponge member 44 is attached to the developing device 1 as shown in FIG.
When the developing roll 30 of No. 4 is close to the surface of the photoreceptor drum 12, it is placed under pressure against the surface of the conveying roller 24. Further, as shown in FIG. 4, the moving lever 46 rotates about the pivot shaft 48 in the direction of the arrow, and the developing device 14 moves toward the machine frame surface 10.
When moving on A in the direction of arrow B, the sponge member 44 separates from the surface of the conveyance roller 24.

According to the paper dust removing device configured as described above, when the developing roll 30 of the developing device 14 is in close proximity to the photosensitive drum 12, copying by the image forming apparatus is enabled. The sponge member 44 of the paper dust removing device 36 is in sliding contact with the surface of the conveying roller 24, as shown in FIG.

This sliding contact removes paper dust adhering to the surface of the conveying roller 24, thereby preventing contamination of the photosensitive drum 12.

Since the sponge member 44 presses against the surface of the conveyance roller 24, it is necessary to replace it during maintenance and inspection.

In such a case, the developing device 14 and the like are maintained and inspected, but the developing device 14 is usually separated from the photosensitive drum 30 during maintenance and inspection, and the toner and the like are inspected.

To separate the developing device 14 in this manner, the developer supply device is first moved in the direction of the arrow, as shown in FIG. Next, as shown in FIG. 3, the developing device 14 is slid together with the machine frame 10 in the direction of arrow C, and the developing device 14 is also slid in the direction of arrow B on the machine frame surface 10A. As a result, the sponge member 44 of the paper dust removing device 36 also moves in a similar manner, and the paper dust removing device 36 is completely removed from the paper conveyance path and separated from the surface of the conveyance roller 24 in the radial direction.

Then, when the paper powder removing device 36 is in such a position, the rail member 4 to which the old sponge member 44 is attached is
2 is removed from the support member 38.

Next, a new rail member 42 is attached to the support member 38, and the replacement of the sponge member 44 is completed.

After replacement, the developing device 14 is moved toward the photosensitive drum 12 in the reverse order and brought into contact with the photosensitive drum 12 again. At this time, the new sponge member 44 comes into contact with the surface of the conveyance roller 24 and presses the surface of the conveyance roller 24.

〔Effect of the invention〕

As explained above, according to the paper dust removing device according to the present invention, the support member of the paper dust removing device is attached to the developing device (d).
Since the elastic member is made to move away from the conveyance roller surface in the radial direction when the developing device is moved, when replacing the elastic member, the elastic member separates from the conveyance path and, unlike conventional methods, can be replaced while slidingly contacting the conveyance roller surface. never be done. Therefore, when replacing the elastic member, the conveyance path can be kept clean without scattering paper powder on the conveyance path.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of an image forming apparatus equipped with a paper dust removing device according to the present invention, FIG. 3 is a perspective view of a developing device of the paper dust removing device according to the present invention, and FIG. FIG. 5 is an explanatory diagram of the attachment part of the paper dust removing device according to the present invention, and FIG. 6 is an explanatory diagram of the removal part of the conventional paper dust removing device. 10...Machine frame, 12...-Photosensitive drum, 14
- Developing device, 16- Transfer section, 24.25...
-Conveyance roller, 28...Developer supply device, 30
- Developing roll, 32 - Support stand, 36 - Paper dust removal device, 3B - Support member, 40 - Dovetail groove, 42 -
-.Rail member, 44-.-Sponge member.

Claims (1)

[Scope of Claims] Consisting of a support member and an elastic member attached to the support member and provided in a removable manner, the elastic member is disposed with elastic pressure on the surface of a conveying roller that conveys paper toward a photoreceptor drum. In a paper dust removal device that removes paper dust from paper adhering to a conveying roller surface, the support member is attached to or formed on a developing device main body that is provided so as to be separable from the photoreceptor drum surface, and the developing device main body A paper dust removing device characterized in that the elastic member attached to the supporting member is arranged so as to move away from the surface of the conveying roller in the radial direction thereof when the paper dust removing device separates from the photosensitive drum.