JPH0361982A - Paper dust removing device - Google Patents

Abstract

PURPOSE:To efficiently remove paper dust with the simple device by energizing and displacing the device from a non-removing position to a removing position after the front end of paper passes the device. CONSTITUTION:The paper dust removing device 3 is disposed between resist rollers 1 and a transporting path 2. This paper dust removing device 3 is constituted of a brush-shaped upper removing member 3a and a lower removing member 3b in a pair and is formed to the shape symmetrical with a center in the progressing direction of the paper P. The device is energized and displaced from the non-removing position A to the removing position B after the front end of the paper P passes the device. Namely, the paper dust removing device 3 is energized to come into pressurized contact with the paper P immediately when the front end part of the paper P transported in the transporting path 2 passes the paper dust removing device 3. The paper dust P sticking to the paper D is thus removed. The paper dust is efficiently removed by the simple device in this way.

Description

Detailed Description of the Invention ζ Industrial Field of Application The present invention relates to a paper dust removal device (more specifically, a paper dust removal device that removes paper dust attached to paper fed to an image forming device during transportation). The present invention relates to a paper dust removal device.

[Conventional technology]

Conventionally, paper that is fed into an image forming apparatus and transported along a conveyance path is often covered with unnecessary paper dust generated during the product manufacturing process, and if this paper dust adheres to the photosensitive drum, the image quality will deteriorate. This causes inconveniences such as lowering the photosensitive drum surface, damaging the surface of the photosensitive drum, or adhering to the cleaning device, resulting in poor cleaning.

Therefore, for example, in the invention of JP-A-59-79273, the conveyance roller 1ili of the conveyance path 12 is
The tips of the brushes 13a and 13b are attached so that they are in contact with the outer periphery of the conveyor rollers 11 and 11, and paper dust once attached to the conveying rollers 11 and 11 from the paper P is indirectly removed by the rubbing of the brushes 13a and 13b. There is.

Further, in the invention of Utility Model Application Publication No. 59-43973, as shown in FIG. 23a and 23b, and suction ports 23g and 23h for sucking the paper dust swept away by the rotating brushes 23a and 23b, and the paper dust is removed by suction by a suction means (not shown).

[Problems to be Solved by the Invention] However, since the conveyance rollers 11 were not originally created for the purpose of adhering paper dust, the adhesion of paper dust is incomplete, and therefore the conveyance rollers The indirect method of removing paper dust once attached using the brushes 13a and 13b has a problem in that the paper dust cannot be removed sufficiently.

In addition, rotating brushes 23a and 23b and suction CI 23g
・The method using 23h and suction means had the problem that the equipment was complicated and large, resulting in high cost.

The present invention aims to solve such problems.

[Means to solve the problem]

In order to achieve the above object, the present invention provides the following paper dust removal device.

That is, the present invention provides a removal position that is provided in a part of the conveyance path of an image forming apparatus and that presses against the conveyed paper to remove paper dust from the paper, and a removal position that does not remove the paper dust by releasing the pressure from the paper. The paper dust removing device is movable to a non-removal position and is biased to be displaced from the non-removal position to a removal position after the leading edge of the paper has passed.

[Effect]

In the above configuration, when the leading edge of the paper conveyed through the conveyance path passes the paper dust removal device, the paper dust removal device is immediately displaced from the non-removal position to the removal position by bias, and comes into pressure contact with the paper. Remove paper dust adhering to the paper.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Regarding embodiments of the present invention, how the configuration of the present invention is actually embodied will be described below with reference to the drawings, along with its operation.

FIG. 1 is a perspective view of an embodiment of the present invention. In the figure, ■ is a registration roller that is a conveyance roller immediately before a photosensitive drum (not shown), 2 is a conveyance path for conveying paper P, and upper guide plate 2
A and a lower guide plate 2b form a pair, and the paper P fed from the paper feed section (not shown) is conveyed between them.

Further, a paper dust removing device 3, which is a main part of the present invention, is disposed between the registration roller (2) and the conveyance path 2.

This paper dust removing device 3 is composed of a pair of brush-shaped upper removing member 3a and lower removing member 3b, and these removing members may be any suitable material such as a brush, sponge, or felt. good.

This paper dust removing device 3 is formed in a left-right symmetrical shape with respect to the traveling direction of the paper P, but a portion near the front of the upper removing member 3a is cut out to make it easier to understand.

A solenoid 4 is disposed near both ends of the upper removal member 3a as a biasing member, so that during operation, the upper removal member 3a can be electromagnetically attracted and displaced downward! I'm under threat.

The paper P conveyed through the conveyance path 2 is sent to the registration rollers l via this paper dust removing device 3.

Paper dust removal device just before the photosensitive drum (X not shown)! 13 is provided because it is desired to maximize the effect of removing paper dust from the photosensitive drum.

Second! ] is an enlarged explanatory view of the main part of the same embodiment, with some parts cut away.

Blade length 5 is a compression spring which is a biasing member, and this compression spring 5
is a biasing member that normally pushes the upper removal member 3a upward relative to the lower removal member 3b to widen the vertical distance.

When the upper removal member 3a is electromagnetically attracted by the solenoid 4, it can be pressed down against the compression spring 5.

@Figure 3 and Figure 4 are operation explanatory diagrams of the same embodiment,
Of these, FIG. 3 shows a state at the non-removal position, tA, during non-operation.

That is, when the leading edge of the paper P passes through the paper dust removal device 3, the upper removal member 3a is in an open state, that is, in the non-removal position A. Therefore, since the leading edge of the paper P does not come into contact with the paper dust removing device 3, the paper P is not damaged, and paper jam accidents such as so-called jams can be prevented from occurring.

In the following Figure 4, the leading edge of the paper P is caught between the registration rollers 1 and pulled, and the upper removal member 3a is in the removal position B where it closes downward and presses against the paper P, allowing paper dust to be removed. .

After that, when the trailing edge of the paper P finishes passing through the paper powder removing device t3, the upper removing member 3a opens upward and returns to the open state A.
Return to

In this way, the paper dust is directly removed from the paper P by the displacement operation of the paper dust removing device 3, so that paper dust can be removed efficiently with a simple device.

Also, after the leading edge of the paper P has passed, the upper removal member 3a is displaced downward and presses the paper P *a, so that the paper P
The tip will not be damaged and can prevent jams from occurring.

Figure 5 is an enlarged explanatory diagram of the paper dust removal device in Figure 1.
The upper removal member 3a and the lower part removal member 3b are II type that can be inserted into and removed from the upper guide member 3cl and the lower guide member 3d, respectively.

With such a configuration, the embodiment has the effect that minced meat can be replaced easily.

〔Effect of the invention〕

As described above, according to the present invention, the paper dust removing device is in pressure contact with the paper and directly removes the paper dust, which is efficient.

Furthermore, since there is no rotating device or suction device, and the structure is simplified, it is possible to downsize the device and reduce costs accordingly.

Furthermore, after the leading edge of the paper has passed, the paper dust removal device moves to the removal position and presses against the paper, so the leading edge of the paper is not damaged and malfunctions such as paper jams can be prevented. There is.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is an enlarged explanatory view of the main parts of the same embodiment, FIGS. 3 and 4 are explanatory diagrams of the operation of the same embodiment, and FIG. The enlarged explanatory view of the paper dust removing device shown in the figure, and FIGS. 6 and 7 are explanatory views of conventional examples. 2... Conveyance path, 3... Paper dust removal device, 4... Solenoid (biasing member) A...
Non-removal position, B: removal position, P: paper, D: paper dust. applicant

Claims (1)

[Claims] It is provided in a part of the conveyance path of the image forming apparatus, and has a removal position where it presses against the conveyed paper and removes paper dust from the paper, and a non-removal position where the pressure is released from the paper and paper dust is not removed. What is claimed is: 1. A displaceable paper dust removing device, characterized in that the paper dust removing device is biased and displaced from the non-removal position to the removal position after the leading edge of the paper has passed.