JPH08305135A - Cleaning pad and electrifier using the same - Google Patents

Abstract

PURPOSE: To provide a cleaning pad excellent in cleaning performance and durability. CONSTITUTION: The cleaning pad is constituted in such a manner that a supporting layer 4 made of an elastic material is supported by a substrate 5 and a cleaning layer 2 consisting of a wear resistance surface layer 2b provided with a layer with fixed abrasives 2a on a contact end surface with an electrifying wire is joined to the supporting layer 4, to excellently maintain the cleaning performance for the electrifying wire by the layer with the fixed abrasives 2a and the wear resistance surface layer 2b and enhance the durability. The supporting layer 4 is properly deformed by contact pressure with the electrifying wire, to make cleaning for the outer periphery of the electrifying wire more effective.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning pad used for cleaning a charging wire of an electronic copying machine or the like, and a charging device incorporating the cleaning pad.

[0002]

2. Description of the Related Art Conventionally, in a charging device in an electronic copying machine or the like, a cleaning pad having a cleaning layer 61 attached to a substrate 62 as shown in FIG. 11 in order to remove dirt caused by repeated use of a charging wire 50. 60
Is used to configure a cleaning device to remove dirt adhering to the charging wire 50.

Further, in a charging device in an electronic copying machine or the like, particularly a charging device using negative charging, a gold plating layer 52 is formed on the outer circumference of a tungsten wire 51 in order to perform a stable charging operation, as shown in FIG. The charging wire 50 described above is often used.

[0004]

However, in the conventional charging wire cleaning apparatus, the cleaning wire 60 is attached to the charging wire 50 by using the cleaning pad 60 in which the cleaning layer 61 is attached to the substrate 62 as shown in FIG. When the operation of removing dirt is repeated, the pressure 63 and the frictional force between the cleaning layer 61 and the charging wire 50 cause cracks 63 in the cleaning layer 61 as shown in FIG. 11 or the cleaning layer 61 is worn out. There is a problem in that the cleaning power for the charging wire 50 is reduced, and image unevenness is generated due to dirt adhering to the charging wire 50, resulting in deterioration of image quality.

Further, in the case of the conventional charging device using negative charging, stable negative discharge can be performed by the charging wire 50 having the gold plating layer 52 at the initial stage, but when the charging wire 50 is used frequently, gold plating is performed. Phenomenon in which the stability of the negative discharge is lowered due to unevenness of the plating of the wire, such as peeling of the layer 52 or vaporization of the gold plating and vapor deposition on the grit occurs. As a result, when an image is formed on paper using this charging device,
There is a problem that image unevenness occurs and the image quality is deteriorated.

Therefore, an object of the present invention is to provide a cleaning pad excellent in cleaning property and durability, and a charging device incorporating the cleaning pad and exhibiting stable charging operation.

[0007]

A cleaning pad according to claim 1, wherein the cleaning pad is formed of an abrasion resistant surface layer and has an abrasive material fixing layer on a contact end surface of the charging device for a charging wire. It is characterized in that it has a support layer formed of an elastic material and joined to the back surface side of this cleaning layer, and a substrate that supports this support layer.

According to a second aspect of the present invention, there is provided a charging device including a charging wire made of a tungsten oxide wire or a mirror surface tungsten oxide wire and a wear resistant surface layer, and an abrasive material fixing layer on a contact end surface of the charging wire. A cleaning pad provided with a cleaning layer provided, a support layer formed of an elastic material bonded to the back surface side of the cleaning layer, and a substrate supporting the support layer. .

According to a third aspect of the present invention, the charging device comprises a tungsten oxide wire or a mirror surface tungsten oxide wire, the initial tension is set to 150 to 350 g, and the tensile strength of the cleaning pad during cleaning is 100 to 30.
A cleaning layer formed by a charging wire having a range of 0 g and an abrasion resistant surface layer, and having a polishing material fixing layer on the contact end surface with respect to the charging wire, and the elasticity bonded to the back surface side of the cleaning layer. And a cleaning pad having a support layer formed of a conductive material and a substrate supporting the support layer.

According to a fourth aspect of the present invention, there is provided a charging device comprising a tungsten oxide wire obtained by subjecting a tungsten wire to an oxidation treatment or a mirror-finished tungsten oxide wire obtained by subjecting a tungsten wire to a mirror finish and then an oxidation treatment. A cleaning layer which is formed by a charging wire having a tensile strength of 100 to 300 g by a cleaning pad at that time and an abrasion resistant surface layer and which has an abrasive material fixing layer on the contact end surface to the charging wire; It is characterized in that it has a supporting layer formed of an elastic material and bonded to the back surface side of the cleaning layer, and a cleaning pad provided with a substrate supporting the supporting layer.

According to a fifth aspect of the present invention, the charging device comprises a tungsten oxide wire or a mirror surface tungsten oxide wire, the initial tension is set to 150 to 350 g, and the tensile strength of the cleaning pad during cleaning is 100 to 30.
A cleaning layer formed by a charging wire having a range of 0 g and an abrasion resistant surface layer, and having a polishing material fixing layer on the contact end surface with respect to the charging wire, and the elasticity bonded to the back surface side of the cleaning layer. And a cleaning pad including a support layer formed of a conductive material and a substrate that supports the support layer, and a pair of the cleaning pads that support the cleaning layers so that the cleaning layers face each other with the charging wire interposed therebetween. And a pad support mechanism section having a moving body that presses and contacts each of the cleaning layers that are opposed to each other at the time of cleaning.

[0012]

According to the cleaning pad of claim 1,
Since the support layer formed of the elastic material is supported by the substrate, and the cleaning layer composed of the abrasion-resistant surface layer having the abrasive fixing layer on the contact end surface for the charging wire is joined to the support layer. When the cleaning pad is brought into contact with the charging wire for cleaning, the abrasive fixing layer and the abrasion resistant surface layer maintain good cleaning performance for the charging wire, and
The durability can be increased. Further, since the support layer is appropriately deformed by the contact pressure with the charging wire, the cleaning effect on the outer periphery of the charging wire can be further enhanced.

According to the charging device of the second aspect, the tungsten oxide wire or the mirror surface tungsten oxide wire is used as the charging wire, and the charging wire is cleaned by the cleaning pad exhibiting the action of the first aspect. In addition, the cleaning performance of the cleaning pad with respect to the charging wire can be excellently maintained and excellent, and the uneven charging of gold as in the conventional example can be eliminated and a stable charging operation can be achieved.

According to the charging device of claim 3, a tungsten oxide wire or a mirror surface tungsten oxide wire is used as the charging wire, the initial tension is 150 to 350 g, and the tensile strength of the cleaning pad at the time of cleaning is 100 to 300 g. In addition, since the cleaning pad that exhibits the action of claim 1 cleans the charging wire, the contact state between the charging wire and the cleaning pad becomes appropriate, and the cleaning performance of the cleaning pad with respect to the charging wire is improved. In addition to being able to maintain excellent durability and good maintenance, there is no stain residue adhered to the wire as in the conventional example, and stable charging operation can be exhibited.

According to the fourth aspect of the present invention, the charging device is a tungsten oxide wire obtained by subjecting a tungsten wire to an oxidation treatment or a mirror-finished tungsten oxide wire obtained by subjecting a tungsten wire to a mirror finish and then subjecting it to an oxidation treatment. The tensile strength of the cleaning pad at the time of cleaning is set in the range of 100 to 300 g, and the charging wire is cleaned by the cleaning pad that exhibits the action of claim 1, and therefore the charging of claim 3 is performed. As in the case of the device, the contact state between the charging wire and the cleaning pad becomes appropriate, and the cleaning performance of the cleaning pad against the charging wire can be maintained excellently and well, and the unevenness of gold plating as in the conventional example can be maintained. Stable charging operation It is possible to volatilization.

According to the charging device of claim 5, a tungsten oxide wire or a mirror surface tungsten oxide wire is used as the charging wire, the initial tension is 150 to 350 g, and the tensile strength of the cleaning pad during cleaning is in the range of 100 to 300 g. In addition, the cleaning layers of the pair of cleaning pads exhibiting the action according to claim 1 are arranged so as to oppose each other by sandwiching the charging wire by the moving body, and the pad supporting mechanism section opposes when cleaning the charging wire. Since each of the cleaning layers is pressed against both sides of the charging wire, the charging wire of this charging device can be efficiently cleaned and has excellent durability. There is no uneven plating of gold, and very stable charging operation is demonstrated. It is possible.

[0017]

Embodiments of the present invention will be described below.

First, a charging device 10 using the cleaning pad 1 of this embodiment will be described with reference to FIGS. 1 to 5.

As shown in FIG. 3, the charging device 10 shown in FIG. 1 includes a main body 11 having a U-shaped cross section, which is arranged along the axial direction on the outer periphery of a photoconductor 40 having a charging property. .

At one end of the main body 11, there is provided a latch shaft 13 which is arranged so as to float from the bottom surface of the main body 11,
At the other end of the main body 11, a pair of fixed columns 14 and 15 is provided upright at a position facing the latch shaft 13.

One end of each of the charging wires W, W is connected to a pair of rings 16a, 16b hung on the latch shaft 13, and a pair of springs 18a, 18b attached to the fixed columns 14, 15 are charged respectively. By connecting the other ends of the wires W, W, both charging wires W are stretched in a state of floating from the bottom surface of the main body 11 with a predetermined tension.

In the stretched area of the charging wires W, W in the main body 11, a recess 21 is formed along the length direction of the main body 11.
a and 21 b are formed, and a support mechanism portion 20 that moves along the length direction of the main body 11 while supporting the cleaning pad 1 is arranged in the recesses 21 a and 21 b.

As shown in FIG. 2, the support mechanism portion 20 has a bearing portion 22 provided in each of the recesses 21a and 21b.
A movable body 2 having a substantially central portion rotatably supported by a and 22b and having one end projecting laterally from the cutout portions 25a and 25b provided in the side frames 11a and 11b of the main body 11.
3a, 23b and contact rollers 24a, 24b attached to the projecting portions of the moving bodies 23a, 23b, and a pair of upper and lower surfaces of the moving bodies 23a, 23b facing each other with the charging wires W, W interposed therebetween. The cleaning pad 1 is provided upright.

In this case, the moving bodies 23a and 23b are shown in FIG.
At the initial position shown in FIG. 7, the cleaning layer 2 of each cleaning pad 1 does not contact the charging wire W.

The moving bodies 23a and 23b are driven in the directions of arrows a and b in FIG. 1 by driving means (not shown).

The charging wire W is formed by oxidizing a tungsten wire W0 as shown in FIG. 4 or by subjecting the tungsten wire W0 to a mirror surface treatment and then an oxidation treatment.
This charging wire W is
Stable discharge performance is exhibited during negative discharge, and discharge stability equivalent to that of the gold-plated tungsten wire is exhibited even during initial use. This point will be described later in detail.

As shown in an enlarged view in FIG. 5, the cleaning pad 1 has an abrasion resistant surface layer 2b made of, for example, a non-woven PET material, and a polishing formed on the surface side of the abrasion resistant surface layer 2b. Material fixing layer 2a (average particle size 16 μm to 4
A cleaning layer 2 made of alumina powder having a density of about 0 μm and a density of about 1000 mm ³ fixed by an epoxy resin), and a support attached by using a double-sided tape (corresponding to # 5011) 3 on the back side of the abrasion resistant surface layer 2b. Layer (CR
(Made of rubber, JIS C hardness: 20 to 30 degrees) 4, and supports the support layer 4 at its end portion,
And a base body 5 attached to 23b.

Next, the relationship between the initial setting of the tension of the charging wire W and the tensile strength of the cleaning pad 1 during cleaning will be described with reference to FIG.

The initial tension of the charging wire W is 1
Set to 50 to 350 g. Further, the tensile strength of the cleaning pad 1 at the time of cleaning is set in the range of 100 to 300 g.

As shown in FIG. 9, when the initial tension of the charging wire W is 150 g or less, leakage occurs due to insufficient tension and uneven discharge occurs. Also, the tensile strength is 1
When it is less than 00 g, uneven discharge occurs due to defective cleaning of the cleaning pad 1. Further, in the range where the initial tension exceeds 350 g, the range where the tensile strength exceeds 300 g, and the region B where the initial tension and the tensile strength are poorly balanced as shown in FIG.
The wire stretching and the discharge unevenness occur during the attachment or cleaning.

After all, the initial tension is 150 to 350 g,
It has been found that the region A shown in FIG. 9 having a tensile strength of 100 to 300 g is optimum.

The state of occurrence of image unevenness when an image is formed using the above-described charging device 10 of the present embodiment will be described with reference to FIG. In addition, FIG. 10 shows a tungsten wire or a surface carbon tungsten wire as a comparative example, a gold-plated tungsten wire of a conventional example, and a charging wire W of this embodiment.
9 shows comparison data of the occurrence state of image unevenness at the time of initial use and at the time of copying 60,000 sheets when and are used. In FIG. 10, the O mark indicates that there is no image unevenness, which is 2
The double circle mark shows that there is no image unevenness even after copying 300,000 sheets.
The mark x indicates a state where image unevenness has occurred.

As is clear from the comparison data shown in FIG. 10, in the charging device 10 of this embodiment, cleaning is not performed at the time of initializing, cleaning is performed by the cleaning pad of the conventional example, and cleaning pad 1 of this example. No image unevenness occurs in any case when cleaning is performed by using, and 30 times when cleaning is performed by using the charging wire W of the present embodiment.
It can be seen that even if ten thousand copies were made, it was possible to achieve a state with no image unevenness.

On the other hand, when a tungsten wire or a surface carbon tungsten wire is used as a comparative example, the cleaning is not performed, the cleaning is performed by the conventional cleaning pad, and the cleaning is performed by using the cleaning pad 1 of the present embodiment. In the case of as well, it can be seen that the image unevenness occurs at the initial time.

Further, when the gold-plated tungsten wire of the conventional example is used, no image unevenness occurs at the initial stage when cleaning is not performed and when cleaning is performed by the conventional cleaning pad, but the cleaning pad 1 of the present example is used. It can be seen that image unevenness occurs at the time of initializing cleaning. When the conventional gold-plated tungsten wire is used, 6
It can be seen that, when 10,000 sheets are copied, image unevenness occurs when cleaning is not performed and when cleaning is performed using the cleaning pad of the conventional example, but image unevenness does not occur when cleaning is performed using the cleaning pad 1 of the present example.

In FIG. 10, * 1 means that image unevenness occurs due to non-uniformity of negative discharge,
* 2 means that the adhered material causes image unevenness due to long-term use, and * 3 means that the adhered material does not come off due to deterioration of cleaning performance and image unevenness occurs.
* 4 means that image unevenness occurs due to non-uniformity of negative discharge due to peeling of gold plating.

Next, the cleaning operation of the charging wire W in the charging device 10 will be described with reference to FIGS.

According to this charging device 10, when, for example, the moving body 23a is driven from the state shown in FIG. 7 in the direction of arrow a as shown in FIG.
The contact roller 24a of “a” hits the edge of the notch 25a, and the moving body 23a rotates in the direction of arrow c.
As shown in FIG. 8, the abrasive particle layer 2a and the cleaning layer 2 of each cleaning pad 1 come into contact with the charging wire W so that the charging wire W is sandwiched at regular intervals, whereby the charging wire W is contacted. The adhered substances such as the toner adhering to W are to be removed all at once and surely.
The cleaning performance can always be fully exerted.

Further, since the abrasive particle layer 2a of the cleaning pad 1 and the cleaning layer 2 only when the abrasive particle layer 2a is consumed are in contact with the charging wire W, the cutting resistance of the cleaning layer 2 is high. Since it is high, it is possible to prevent "breakage of the cleaning pad 1" from occurring, and it is possible to maintain the cleaning performance for a long period of time.

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the invention.

[0041]

According to the first aspect of the present invention, the abrasive sticking layer and the abrasion-resistant surface layer can maintain good cleaning performance for the charging wire and enhance durability, and support the same. It is possible to provide a cleaning pad having excellent durability and cleaning performance that can further enhance the cleaning effect on the outer periphery of the charging wire by the layer.

According to the second aspect of the present invention, the cleaning performance of the cleaning pad with respect to the charging wire can be maintained excellently and excellently, and the uneven plating of gold as in the conventional example is eliminated, and the stable charging operation is achieved. It is possible to provide a charging device capable of exhibiting the above.

According to the third aspect of the present invention, the contact state between the charging wire and the cleaning pad becomes appropriate, and the cleaning performance for the charging wire is excellent and excellent in durability as in the second aspect of the invention. It is possible to provide a charging device that can be maintained and exhibit a stable charging operation.

According to the invention of claim 4, as in the case of claim 3, the state of contact between the charging wire and the cleaning pad is appropriate, and the cleaning pad has excellent cleaning performance with respect to the charging wire. In addition, it is possible to provide a charging device that can be maintained satisfactorily and that can achieve stable charging operation by eliminating uneven plating of gold as in the conventional example.

According to the fifth aspect of the invention, the charging wire cleaning operation can be performed efficiently and with excellent durability, and the gold plating unevenness as in the conventional example is eliminated, resulting in a very stable charging operation. It is possible to provide a charging device capable of exhibiting the above.

[Brief description of drawings]

FIG. 1 is a plan view of a charging device incorporating a cleaning pad of this embodiment.

FIG. 2 is a cross-sectional view of a charging device incorporating the cleaning pad of this embodiment.

FIG. 3 is a diagram showing an arrangement of a charging device of the present embodiment with respect to a photoconductor.

FIG. 4 is a cross-sectional view showing a tungsten wire forming a charging wire of this embodiment.

FIG. 5 is an enlarged cross-sectional view showing the cleaning pad of this embodiment.

FIG. 6 is a perspective view showing a moving body of a charging device incorporating the cleaning pad of the present embodiment.

FIG. 7 is an explanatory diagram showing a cleaning state of a charging wire of the charging device according to the present exemplary embodiment.

FIG. 8 is an explanatory diagram showing a cleaning state of a charging wire of the charging device according to the present exemplary embodiment.

FIG. 9 is an explanatory diagram showing the relationship between the initial setting of the tension of the charging wire and the tensile strength of the cleaning pad during cleaning according to this embodiment.

FIG. 10 is an explanatory diagram showing comparative data of image unevenness occurrence states at the time of initialing and copying 60,000 sheets when each charging wire of the comparative example, the conventional example, and the present example is used.

FIG. 11 is a side view of a conventional cleaning pad.

FIG. 12 is a cross-sectional view of a conventional charging wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning pad 2 Cleaning layer 2a Abrasive fixing layer 2b Abrasion resistant surface layer 3 Double-sided tape 4 Support layer 5 Base 10 Charging device 11 Main body 20 Support mechanism part 23a Moving body 23b Moving body 40 Photoconductor

Claims (5)

[Claims] 1. A cleaning layer which is formed of an abrasion resistant surface layer and has an abrasive material fixing layer on a contact end surface of a charging device with respect to a charging wire, and an elastic material bonded to the back surface side of the cleaning layer. A cleaning pad comprising a support layer formed by the above and a substrate supporting the support layer. 2. A cleaning layer formed of a charging wire made of a tungsten oxide wire or a mirror surface tungsten oxide wire and an abrasion resistant surface layer, and a cleaning layer having an abrasive material fixing layer on a contact end surface to the charging wire, A charging device, comprising: a cleaning layer having a support layer formed of an elastic material, which is bonded to the back surface side of the cleaning layer, and a substrate supporting the support layer. 3. A charging wire comprising a tungsten oxide wire or a mirror surface tungsten oxide wire, having an initial tension set to 150 to 350 g, and a tensile strength of a cleaning pad during cleaning in the range of 100 to 300 g, and abrasion resistance. A cleaning layer formed of a surface layer and provided with an abrasive material fixing layer on the contact end surface for the charging wire, a support layer formed of an elastic material bonded to the back surface side of the cleaning layer, and the support layer A charging device, comprising: a cleaning pad having a supporting base; 4. A tungsten oxide wire obtained by subjecting a tungsten wire to an oxidation treatment or a mirror-finished tungsten oxide wire obtained by subjecting a tungsten wire to a mirror treatment and then an oxidation treatment, and having an initial tension of 1.
It is set to 50 to 350g, and the tensile strength of the cleaning pad during cleaning is 100 to 300g.
And a cleaning layer which is formed of a wear resistant surface layer and which has an abrasive material fixing layer on the contact end surface with respect to the charging wire, and the elasticity bonded to the back surface side of this cleaning layer. A charging device comprising: a support layer formed of a material; and a cleaning pad including a substrate that supports the support layer. 5. A charging wire comprising a tungsten oxide wire or a mirror surface tungsten oxide wire, having an initial tension set to 150 to 350 g, and a tensile strength of a cleaning pad during cleaning in the range of 100 to 300 g, and abrasion resistance. A cleaning layer formed of a surface layer and provided with an abrasive material fixing layer on the contact end surface for the charging wire, a support layer formed of an elastic material bonded to the back surface side of the cleaning layer, and the support layer A cleaning pad having a supporting base and a pair of the cleaning pads are supported so that the cleaning layers face each other with a charging wire interposed therebetween. Pad support machine equipped with a moving body that presses and contacts both sides of the pad A charging device, characterized in that it comprises a part, a.