JP3015618U - Charger wire cleaning member - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a long-life charger wire cleaning member that is tough and flexible, has no clogging, and has excellent grindability. [Structure] A nonwoven fabric 4 having irregularities on the surface was attached to the surface of a porous and flexible substrate 2, and a powder layer 5 having a grinding function was provided on the surface of the nonwoven fabric 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a charger member cleaning member for charging a photosensitive drum of an electronic copying machine with electric charges.

[0002]

[Prior art]

 In an electronic copying machine, a high voltage is applied to a plurality of charger wires (hereinafter simply referred to as wires) provided above a photoconductor drum to generate corona discharge in the dark, and a positive charge is applied to the photoconductor drum and the paper. Charge evenly on top. Then, light from an eraser is applied to the charged photoconductor drum to erase electric charges in unnecessary portions, and toner is prevented from adhering to portions that are not transferred.

As such a wire, an extremely thin metal wire (for example, a tungsten wire having a diameter of 60 μm plated with gold having a thickness of about 0.3 μm) is used, and the surface is always exposed. is necessary. However, carrier (SiO ₂ ) contained in the toner, atomized silicon oil discharged from the device, talc and rosin contained in paper dust and paper, and dust adheres to the surface of the wire. Carriers, silicone oil, etc., will stick to the surface of the wire due to the temperature rise due to electric discharge, causing scale. Then, by accumulating these, the surface of the wire is covered, the conductive characteristics change, and the charger function deteriorates. Therefore, in order to remove such deposits and scales to expose the surface of the wire, for example, the surface of the wire is cleaned once a day with a cleaning device to prevent deterioration of the charger function.

FIG. 4A is a bottom view of an example of the above wire cleaning device, and FIG. 4B is a sectional view taken along line AA. In the figure, reference numeral 11 denotes a frame having a rectangular shape in a plan view and a U-shaped cross section, and a screw shaft 12 is rotatably attached to a central portion thereof. Reference numeral 13 is a reversible electric motor that drives the screw shaft 12. Wires 14a and 14b are stretched on both sides of the screw shaft 12 in parallel with each other. As described above, for example, a tungsten wire having a diameter of 60 μm is gold-plated to a thickness of about 0.3 μm. .

Reference numeral 15 denotes a holder for a cleaning member 20 described later, which includes a substrate 16 having a screw portion 17 to be screwed onto the screw shaft 12 and an elastic member provided on the substrate 16 at the same intervals as the wires 14a and 14b. And U-shaped holding portions 18a and 18b. The holding portions 18a and 18b are provided with elasticity inwardly facing each other, and a receiving portion 19 for a concave cleaning member 20 is formed at the tip end portion so as to face each other, as shown in FIG. A cleaning member 20 is formed to have a size to be accommodated in the accommodating portion 19 of the holding portions 18a and 18b. As shown in FIG. 6, a non-woven fabric 23 is attached to the release paper 21 with an adhesive 22. Then, a leather or felt (hereinafter referred to as leather) 24 is adhered thereon with an adhesive, and the leather 24 is housed in the housing portion 19 with the leather 24 facing each other.

In the holder 15 configured as described above, the screw portion 17 is screwed onto the screw shaft 12 to be attached to the frame 11, and the cleaning member 20 holds the wires 14 a and 14 b from both sides. At this time, the cleaning member 20 is pressed against the wires 14a and 14b with a slight force (for example, 50 to 60 g / cm ² ) due to the elasticity of the holding portions 18a and 18b. In such a cleaning device, for example, once a day, the reversible electric motor 13 is driven to reciprocate the holder 15, the cleaning member 20 is slid along the wires 14a and 14b, and the paper adhered to the wires 14a and 14b is moved. The powder and dust, and also the scale burned on the surfaces of the wires 14a and 14b are removed.

In the wire cleaning device of the electronic copying machine, it is necessary to satisfy the following points. (1) It is possible to remove not only paper dust and dust attached to the wires 14a and 14b, but also scales that are seized on the surfaces of the wires 14a and 14b. (2) During cleaning, the surfaces of the wires 14a and 14b should not be scratched or the gold plating should not be peeled off. (3) The removed paper powder, dust, scale, etc. should not fall into the device.

However, although the above-mentioned cleaning device can remove adhered substances such as paper dust and dust, when the holder 15 moves in the opposite direction, the paper dust adhered to the cleaning member 20 again attaches to the wires 14a and 14b. However, since it is difficult to remove the entire scale burned on the surfaces of the wires 14a and 14b, the wires 14a and 14a had to be replaced from time to time. In addition, the removed paper dust and scales may fall into the device.

In order to solve such a problem, for example, in the microfilm of Japanese Patent Application No. 55-78284 (Japanese Utility Model Application No. 57-3243) (hereinafter referred to as Conventional Example 1), the grit or the cleaning material is used. One half of the part that contacts the corona wire is equipped with a polishing member, and the other half is coated with a flexible abrasion-resistant substance such as a sponge that supports the polishing member so that it directly contacts the grid or corona wire. It describes a corona discharger in which stains and the like are removed with a sponge.

In addition, Japanese Patent Application No. 59-35868 (Japanese Utility Model Laid-Open No. 60-150563) microfilm (hereinafter referred to as Conventional Example 2) has a cleaning surface made of a polishing member and a cleaning surface made of a non-polishing member. In a cleaning tool for corona discharge of an image forming apparatus in which the adjacent members are attached to a supporting member via an elastic member, non-polishing members are provided on both sides of the polishing member, and the surface area of the polishing member is A cleaning tool for corona discharge smaller than the surface area is described.

[0011]

[Problems to be solved by the device]

 The cleaning members described in the above-mentioned conventional examples 1 and 2 all have a polishing member attached on a flexible member such as a sponge, so that the change with time is severe, and they are fragile and are torn or broken during use. Since it is easy to do and has a short life because it is easily clogged, it often had to be replaced.

The present invention has been made to solve the above problems, and is to provide a cleaning member for a charger wire which is tough and flexible, has no clogging, has excellent grindability, and has a long life. It is intended.

[0013]

[Means for Solving the Problems]

 The cleaning member for a charger wire according to the present invention has a non-woven fabric having irregularities on the surface thereof, which is attached to the surface of a substrate having multi-pores and flexibility, and a powder layer having a grinding function is provided on the surface of the non-woven fabric. It is a thing.

[0014]

[Action]

 The cleaning member is housed in the housings facing each other of the holder and the wire is clamped. Then, the holder is reciprocated along the wire to remove paper dust and dust adhering to the wire, as well as scales burned on the surface of the wire. At this time, the paper dust, dust, scale, and the like removed from the wire are captured by the concave portion of the non-woven fabric or the base material, and do not fall into the device.

[0015]

【Example】

 FIG. 1 is a sectional view of an embodiment of a cleaning member according to the present invention. In the figure, 1 is a cleaning member, 2 is a porous and flexible substrate such as sponge, felt, and foamed resin, and 3 is an adhesive applied to the surface of the substrate 2. As shown in FIG. 2, reference numeral 4 denotes a non-woven fabric having a textured surface, which is affixed to the surface of the substrate 2. 5 is a powder layer provided on the surface of the non-woven fabric, such as alumina, carbon random or diamond. As described above, the granular material 6 having a grinding function (hereinafter referred to as the abrasive 6) is mixed with, for example, an adhesive and applied. Alternatively, an adhesive may be applied to the surface of the non-woven fabric 4, the abrasive 6 may be dispersed, and the adhesive may be thinly applied thereon. In addition, in the present invention, the one in which fibers are bonded or the one in which fibers are entangled is collectively referred to as a non-woven fabric.

According to the example, chloroprene rubber having a pore diameter of 0.02 to 0.3 mm and a thickness of 1 to 10 mm was used as the base material 2. The non-woven fabric 4 is made of fibers such as polyester, nylon and rayon that hardly absorb moisture (see FIG. 2 (b)). As shown in FIG. 2, the length L and the width W are about 1 each on the surface. The concave and convex portions 41 having a width of 0.5 mm and the convex portions 42 having a width G of about 0.5 mm formed between the concave portions 41 are used for the concavo-convex processing. I pasted it. Further, as the abrasive 6 for forming the powder layer 5, powders such as aluminum and diamond having a powder diameter of 0.5 to 20 μm are mixed with an epoxy adhesive at a weight ratio of 3: 1 to form the nonwoven fabric 4 It was applied to the surface of and dried and cured.

The cleaning member 1 as described above has the flexibility required for the cleaning member 1 while maintaining the toughness by providing the non-woven fabric 4, and the density of the fibers of the non-woven fabric 4 and the concave surface The grinding ability (grinding amount) can be appropriately adjusted by changing the size of the projections, the type of the abrasive 6, or the size of the particles.

As shown in FIG. 3, the cleaning member 1 according to the present embodiment is held by the holding portions 18a and 18b of the holder, and is reciprocated once along the wire 14 to clean the surface. It was exposed without being scratched, and paper dust and scales were captured by the recesses 41 and the support 2 of the nonwoven fabric 4 and did not fall into the apparatus. Further, since the wire 14 is mainly cleaned by the powder layer 5 attached to the convex portion 42 of the nonwoven fabric 4, clogging is not caused.

The wire 14 is cleaned by the cleaning member 1 of the present invention according to the above-described embodiment and the conventional cleaning member having the same specifications as the above but having no nonwoven fabric and having the powder layer directly provided on the base material. Then the test was conducted. (1) Cleaning member Conventional material Base material: rubber sponge (thickness 2.0 mm) Powder layer: # 6000 (average particle diameter 2.0 μm) alumina mixed with epoxy adhesive at a weight ratio of 3: 1. Product of the present invention Base material: Same as conventional product Nonwoven fabric: Polyester spun bond (thickness 0.1 mm) Powder layer: Same as conventional product (2) Cleaning conditions Material to be cleaned: Charger wire (φ60 μm x 300 mm) Contact pressure: 100 g / Cm ²

As described above, the wire 14 is cleaned by applying a pressure that is about twice the normal contact pressure (50 to 60 g / cm ² ) to each of the five cleaning members, and the cleaning members are torn or the powder layer is removed. A test was performed on the number of cleanings until it was destroyed (ground crack phenomenon) and could no longer be used. The test results are as shown in Table 1.

[0021]

[Table 1]

As is clear from Table 1, the conventional cleaning member cannot be used because the cleaning member was torn on average (reciprocating) about 85 times and the powder layer was broken. The cleaning member was able to be cleaned on average 354 times (4 times more than the conventional product). Thus, it is confirmed that the cleaning member of the present invention is tough, has less clogging, and has a significantly longer life. Was done.

[0023]

[Effect of device]

 As is clear from the above description, according to the present invention, a non-woven fabric having irregularities is attached on the base material, and a powder layer having a grinding function is provided on the surface of the non-woven fabric. It is possible to obtain a cleaning portion of the charger wire that has a property. As a result, there is no risk of tearing or damage during use, and a long-life cleaning member that is free of clogging and excellent in grindability can be obtained. Further, the polishing ability can be appropriately adjusted by changing the density of the fibers constituting the non-woven fabric, the size of the surface irregularities, the type of the abrasive or the size of the particles.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of a non-woven fabric forming the main part of the present invention and its A.
-A is an enlarged cross section.

FIG. 3 is a schematic view showing a usage state of the cleaning member according to the present invention.

4A and 4B are a bottom view and a BB sectional view showing an example of a normal charger wire cleaning device.

FIG. 5 is a perspective view showing the shape of the tip of the holder.

FIG. 6 is a perspective view showing an example of a conventional cleaning member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning member 2 Base material 3 Adhesive 4 Nonwoven fabric 5 Powder layer 6 Abrasive material 41 Recessed portion 41 Convex portion

Claims (1)

[Scope of utility model registration request] 1. Cleaning of a charger wire, characterized in that a non-woven fabric having irregularities on the surface is attached to the surface of a porous and flexible substrate, and a powder layer having a grinding function is provided on the surface of the non-woven fabric. Element.