JP2002209634A - Conductive velour material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive velour material capable of restraining falling of bristles while excellently holding electric conductivity and flexibility of piles. SOLUTION: Piles 32 of a brush 30 as the conductive velour material are formed of first pile rows 32a and second pile rows 32b respectively in two rows. The first pile rows 32a are formed of conductive fibers, and are arranged in the width directional center of base cloth 31. The second pile rows 32b are formed of bristle falling preventive fibers having rigidity higher than the conductive fibers, and are respectively arranged on the width directional both edges of the base cloth 31 so as to sandwich the first pile rows 32a from both sides. The conductive fibers for forming the first pile rows 32a are supported from both sides by the second pile rows 32b composed of the bristle falling preventive fibers so that a bristle standing state is maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush used for scraping toner adhered to a photosensitive drum, charging the surface of the photosensitive drum, removing static electricity, and the like, for example, in an image forming apparatus. The present invention relates to a conductive velor material to be formed.

[0002]

2. Description of the Related Art Conventionally, conductive velor materials as described above are:
It is composed of a velor formed by a base cloth made of a woven cloth and a plurality of piles obtained by bundling fibers raised on the base cloth. Then, the tip of the pile is brought into contact with a movable body such as a photosensitive drum rotatably supported in the image forming apparatus at a constant pressure, and is attached to a predetermined location in the image forming apparatus. Has been.
The pile of the conductive velor material described above is, for example, a powder such as toner attached to the surface of the photosensitive drum is charged to a negative polarity or a positive polarity. It is made of conductive fibers to make it easier to scrape from. The conductive fiber is made of a flexible and low sliding resistance, so that the surface of the movable body is prevented from being damaged by the tip of the pile that comes into contact with a certain pressure.

[0003]

However, the pile using the flexible fiber as described above is easily deformed, and the hair falls down due to continuous sliding contact with the surface of the movable body. The pile in which the hair has fallen has a problem that the tip of the hair cannot be brought into contact with the movable body at a constant pressure, and the performance cannot be exhibited. This problem can be solved by making the fiber thicker or harder to make the entire pile harder to deform, but in this case, the sliding resistance of the pile to the movable body increases and However, there is a problem that the surface of the movable body may be damaged by the bristle tips that are in sliding contact.

The present invention has been made by paying attention to such problems existing in the prior art. An object of the present invention is to provide a conductive velor material capable of suppressing hair fall while maintaining good conductivity and flexibility of a pile.

[0005]

In order to achieve the above object, the invention of a conductive velor material according to claim 1 comprises a base material and a plurality of fibers which are raised on the base material. And a velor formed from the pile, and in a state where the pile is in contact with the movable body or the support opposed to the movable body in the image forming apparatus, the pile contacts the support or the movable body. And a plurality of pile rows extending in parallel with a direction intersecting the moving direction of the movable body, and the pile rows are formed of conductive fibers. Pile row, supporting the conductive fibers, formed of hair fall prevention fibers for maintaining the napped state, at least in the front and rear in the moving direction of the movable body in the direction in which the conductive fibers fall on the substrate Arranged on one side It is characterized in that configuration and a second pile columns.

According to a second aspect of the present invention, there is provided the conductive velor material according to the first aspect, wherein the conductive fiber has a thickness per single fiber of 2 to 20 dtex, and The thickness per single fiber is 5 to 50 decitex.

According to a third aspect of the present invention, in the conductive velor material according to the first or second aspect, the number of the hair fall prevention fibers within a predetermined area is within a predetermined area of the conductive fibers. Greater than 0 compared to the number of
It is characterized in that it is 2/3 or less.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a brush 30 as a conductive velor material according to the first embodiment includes a base cloth 31 as a base made of a synthetic resin having a rectangular shape when viewed from a plane.
A pile 32 formed so as to be raised on the base cloth 31.
And a velor consisting of On the back surface of the base cloth 31, a coating layer 33 made of a synthetic resin coating agent is provided, and the base of the pile 32 and the base cloth 31 are joined. An adhesive layer 34 is provided on the back surface of the coating layer 33.
The brush 30 can be stuck to a movable body or a support in the image forming apparatus by the sticking layer 34.

As the base fabric 31, a material such as a woven fabric or a film made of a material having high durability and flexibility is used. Examples of such a material include polyester, polypropylene, acrylic resin, nylon, and urethane resin. The base fabric 31 in this embodiment includes a warp yarn 31a and a weft yarn 31b made of polyester fiber.
A woven fabric constituted by weaving is used.

The pile 32 is composed of a first pile row 32a and a second pile row 32b, two rows each, and a total of four rows.
Are formed so as to extend in parallel with each other in the length direction. In each of the drawings, the first pile row 32a is drawn dark in order to clearly show the arrangement of the first pile row 32a and the second pile row 32b. The first pile row 32a is formed of conductive fibers and is disposed at the center of the base cloth 31 in the width direction. The second pile row 32b is formed of hair fall prevention fibers, and sandwiches the first pile row 32a from both sides.
The base cloth 31 is provided at each of both end edges in the width direction.

The conductive fibers forming the first pile row 32a are made of fibers having conductivity, high durability, high flexibility and good slidability. It is preferable that the specific resistivity of the conductive fiber is set to 10 ⁸ Ω · cm or less. If the specific resistivity is higher than 10 ⁸ Ω · cm, there is a possibility that the effect of removing static electricity cannot be sufficiently exerted. The conductive fibers in this embodiment are:
Conductive acrylic fiber carbon as material was kneaded with yarn stage Toray under the trade name SA-7, a specific resistivity of 10 ²
To 10 ⁴ Ω · cm]. The conductive fibers are more preferably in the range of the specific resistance is 10 ^-2 ~10 ⁸ Ω · cm, the specific resistivity of 10 ^-2 Omega
If it is less than cm, the fibers dropped from the pile 32 may adhere to the high voltage portion in the image forming apparatus, causing a short circuit and causing a failure.

The fibers satisfying the above conditions include:
Regenerated fibers such as rayon fibers and cupra fibers; and synthetic fibers such as fluorine fibers, nylon fibers, acrylic fibers, polypropylene fibers, and polyester fibers are exemplified. Among these, fluorine fibers are more preferable because of their low friction coefficient. As a method for imparting conductivity to the fibers mentioned above, a conductive material is kneaded in the yarn stage, or a conductive portion where the conductive material is kneaded in one fiber by a melt spinning method or the like. And a method of forming a multilayer structure having a non-conductive portion into which a conductive substance is not kneaded, and a method of coating the fiber surface with a working liquid containing a conductive substance after spinning. Examples of such a conductive substance include metals such as silver, copper and nickel, metal compounds such as zinc oxide and tin oxide, and fine particles such as carbon.

The hair fall prevention fibers forming the second pile row 32b are made of fibers having high durability, high rigidity, and good slidability. Examples of such fibers include regenerated fibers such as rayon fibers and cupra fibers, and synthetic fibers such as fluorine fibers, nylon fibers, acrylic fibers, polypropylene fibers, and polyester fibers. Further, the hair fall prevention fiber has an apparent Young's modulus of 1000 to 200,000.
Those within the range of MPa are preferred. When the apparent Young's modulus of the hair fall prevention fiber is less than 1000 MPa, the hair fall prevention fiber is apt to fall down, making it difficult to support the conductive fiber in a napped state. This may increase the sliding resistance and damage the surface of the movable body or the support.

In addition, the hair fall prevention fiber is charged by being rubbed by a movable body in order to prevent powdery material charged negatively or positively from adhering to the fiber surface in the image forming apparatus. At this time, it is preferable to use a material having the same polarity as the powder and granules. In this way, if the hair fall prevention fibers are configured to be charged to the same polarity as the powder particles, the powder particles hardly adhere to the surface of the hair fall prevention fibers. The body can be prevented from re-adhering to the movable body or the support.

The hair fall prevention fiber is not necessarily required to have conductivity, and may be made conductive by using the above-mentioned conductive substances depending on the site or purpose of use.
It is used differently by leaving it non-conductive. When a conductive fiber is used as the hair fall prevention fiber, the specific resistance is preferably set to 10 ⁻² to 10 ⁸ Ω · cm, similarly to the conductive fiber of the first pile row 32a. . The hair fall prevention fiber in this embodiment is formed from non-conductive modacrylic fiber [Kanekalon (trade name, manufactured by Kaneka Chemical Industry Co., Ltd.)]. They are charged to the same polarity. And the second pile row 3 made of hair fall prevention fiber
By 2b, the conductive fibers forming the first pile row 32a are supported from both sides, and the napped state is maintained.

The bellows forming the pile 32 are obtained by pile weaving, warp knitting, electrostatic flocking, or the like. The pile 32 of this embodiment is formed by pile-weaving a plurality of pile yarns each formed by bundling conductive fibers on a base cloth 31.
a is formed, and the second pile row 32b is formed by pile-weaving a plurality of pile yarns obtained by bundling hair fall prevention fibers. The pile weaving is a method of weaving the pile yarn forming the pile 32 so as to be entangled with the weft 31b of the base cloth 31, and the method of tangling the pile yarn includes U weaving and W weaving. Alternatively, they are properly used depending on the purpose of use. In this embodiment, the pile yarn forming the pile 32 is woven so as to be entangled in a U-shape with the weft yarn 31b of the base fabric 31.

When a pile yarn is formed using conductive fibers, the conductive fibers have a thickness per single fiber of 2 to 20.
It is preferable to set within the range of decitex. When the thickness per single fiber of the conductive fiber is less than 2 dtex, the strength of the conductive fiber is reduced and hair breakage is likely to occur, and when the thickness is larger than 20 dtex, the flexibility is reduced,
The sliding resistance may increase. The pile yarn made of the conductive fiber of this embodiment is formed by twisting single fibers each having a thickness of about 7 dtex to have a thickness of 330 dtex / 48 filaments.

In addition, when the pile yarn is formed using the hair fall preventing fiber, the thickness of the hair fall preventing fiber is preferably set within a range of 5 to 50 decitex. When the thickness per single fiber of the hair fall prevention fiber is less than 5 dtex, the rigidity of the fiber is reduced, and the hair becomes easy to fall, so that it is difficult to maintain the conductive fiber in a napped state, and when the thickness is larger than 50 dtex, Flexibility may be reduced and sliding resistance may be increased. In addition, it is more preferable that the pile yarn made of the hair fall prevention fiber is formed so that the thickness per single yarn becomes thicker than the pile yarn made of the conductive fiber. If the pile yarn made of hair fall prevention fibers is thinner than the pile yarn made of conductive fibers,
It becomes difficult to support pile yarns made of conductive fibers with pile yarns made of hair fall prevention fibers. The pile yarn made of the hair fall prevention fiber of this embodiment is formed by twisting single fibers having a thickness of about 11 dtex so that the thickness becomes 560 dtex / 50 filaments.

When forming the pile 32, the number of conductive fibers to be pile-woven is preferably 10,000 to 300,000 within an area of 25.4 mm ² . If the number of piles woven within an area of 25.4 mm ² is less than 10,000, the conductivity of the pile 32 cannot be sufficiently exhibited. No further improvement.

It is preferable that the hair fall prevention fibers are set so that the number of piles woven in a predetermined area is 2/3 or less of the number of piles woven in a predetermined area of the conductive fibers. , 25.4 mm ² , the number is preferably 6,000 to 200,000. If the number of hair fall prevention fibers in a predetermined area is more than 2/3 of the number of conductive fibers, the sliding resistance of the entire pile 32 may increase. Also, 25.4mm
^{If the} number of pile wovens in the area ² is less than 6000, it becomes difficult to support the conductive fibers, and even if the number is more than 200,000, the function of supporting the conductive fibers is not further improved. In this embodiment, the hair fall prevention fiber comprises 2
Is about 50,000 are flocked in the area of 5.4 mm ^2, the conductive fibers are about 100,000 in an area of 25.4 mm ² is flocked, the number of prevention fibers falling hair in a predetermined area ,
The number is set to be about １ ／ compared to the number of conductive fibers.

The coating agent for forming the coating layer 33 may be a rubber-based solvent-type adhesive such as styrene-butadiene copolymer rubber, an ethylene-acrylate copolymer, an ethylene-vinyl acetate copolymer, a polymethacrylic copolymer. An adhesive resin such as methyl acid is used. These coating agents are impregnated between the warp yarns 31a and the weft yarns 31b forming the base fabric 31, and each of the yarns 31a, 31
b and the base of the pile 32 are firmly held, and the threads 31a and 31b are prevented from fraying. Although the brush 30 has sufficient conductivity only with the pile 32, the conductivity of the pile 32 can be more favorably exhibited by imparting conductivity to the coating layer 33. The coating agent preferably has conductivity. As a method of imparting conductivity to the coating layer 33, a method of kneading the above-described conductive substance into a coating agent can be used.

The sticking layer 34 has no core material,
Alternatively, a pressure-sensitive adhesive having a core material and a pressure-sensitive adhesive applied to both surfaces thereof is used. The sticking layer 34 is the coating layer 3
Those having conductivity like 3 are preferable. The sticking layer 34 of this embodiment is formed by forming an aluminum thin film into a core material 34a.
The core material 34a is formed of a double-sided adhesive tape (Teraoka Seisakusho's conductive aluminum foil double-sided tape, No. 791) coated with an acrylic pressure-sensitive adhesive 34b having conductivity on the front and back surfaces thereof. Have been.

The brush 30 is used by attaching it to a predetermined location in the image forming apparatus. Here, the configuration of the image forming apparatus will be described. FIG. 3 is a diagram conceptually showing the image forming apparatus. In the image forming apparatus, a photosensitive drum 11 as a movable body is rotatably supported by a support shaft 11a, and is configured to be chargeable on a surface thereof. A charging unit 12, an exposure unit 13, a developing unit 14, a transfer unit 15, a cleaning unit 17, and a charge removing unit 18 are arranged around the photosensitive drum 11 in order from the upper position in the rotation direction. The surface of the photosensitive drum 11 is charged by a charging unit 12 during rotation, and an electrostatic latent image is formed by an exposure device 13.
The toner is supplied from a developing brush 14b rotatably supported in the inside. Then, the photosensitive drum 1 is transferred by the transfer unit 15.
A visible image is transferred to the recording paper 16 supplied between the transfer unit 1 and the transfer unit 15 by toner as a powder. Thereafter, the toner remaining on the surface of the photosensitive drum 11 is removed by the cleaning unit 17, and the remaining charge is erased by the charge removing unit 18.

The housing 17a constituting the cleaning section 17 has a rectangular box shape having an opening on the front surface, and has a housing facing the photosensitive drum 11 inside.
A support 17b is provided. The brush 30 is placed on the support 1 so that the space between the support 17b and the photosensitive drum 11 is closed.
7b, and is supported by the photosensitive drum 11
The toner remaining on the surface is scraped off by the brush 30. Then, the scraped toner is transferred to the housing 17.
The liquid is collected from the collection port 24 in the inner part of FIG.

Next, the operation of the brush 30 will be described below. Now, as shown in FIG.
The stack 32 is attached to the housing 17 a of the cleaning unit 17 so that the pile 32 contacts the photosensitive drum 11.
4 are joined. At this time, the brush 30 is disposed so that the first pile row 32a and the second pile row 32b forming the pile 32 extend in a direction orthogonal to the rotation direction of the photosensitive drum 11. Further, the second pile row 32b
Are disposed so as to be located forward and rearward in the rotation direction of the photosensitive drum 11 with respect to the first pile row 32a.

In this state, the toner remaining on the surface of the photosensitive drum 11 slides on the pile 32 of the brush 30.
At this time, since the first pile row 32a of the pile 32 is formed of conductive fibers, the static electricity charged in the toner is supplied to the first pile row 32a and discharged to the outside, so that the toner is neutralized. You. Then, the discharged toner is scraped off by the brush 30 and stored in the housing 17a.

The pile 32 of the brush 30 tends to fall down due to deterioration with time, an increase in the number of prints, and the like. At this time,
As the hair fall prevention fiber forming the second pile row 32b, a fiber having high durability and rigidity is used, the hair fall of the second pile row 32b is prevented, and the second pile row of two rows is used. Hair fall of the first pile row 32a supported so as to be sandwiched between the piles 32b is prevented, and hair fall of the entire pile 32 is prevented. In addition, by forming the pile 32 from the second pile row 32b made of highly rigid hair falling prevention fibers and the first pile row 32a made of highly flexible conductive fibers, the pile 32 has good overall quality. Drum 11 having high flexibility and sliding contact with pile 32
Is prevented from being scratched.

The effects exerted by the first embodiment will be described below. The pile 32 of the brush 30 is formed of two rows of a first pile row 32a and a second pile row 32b extending in parallel with the length direction of the base cloth 31, respectively. The first pile row 32 a is formed of conductive fibers having high flexibility, and is disposed at the center in the width direction of the base cloth 31. A second pile row 32b made of high-strength hair fall-prevention fibers is disposed at both edges in the width direction of the base cloth 31 so as to sandwich the first pile row 32a from both sides. For this reason, the first pile row 32a made of conductive fibers
Thereby, the pile 32 can maintain good conductivity and flexibility, and when the hairs fall due to an increase in the number of printed sheets, aging, etc., the second pile row 32b made of the fiber for preventing hair fall is raised. By maintaining the state and supporting the first pile row 32a that is about to fall down from the side, the fall of the pile 32 can be suppressed.

The conductive fibers forming the first pile row 32a have a thickness per single fiber within the range of 2 to 20 dtex, and the hair fall prevention fibers forming the second pile row 32b Has a thickness of 5 per single fiber
It is set within the range of ~ 50 decitex. For this reason, the rigidity and flexibility of the pile 32 can be maintained satisfactorily, the sliding resistance to the photosensitive drum 11 can be kept low, and hair fall can be effectively suppressed.

When the pile 32 is formed, the number of the hair fall prevention fibers forming the second pile row 32b is pile-woven within a predetermined area, and the number of pile-woven fibers within the predetermined area of the conductive fiber is It is set to be 2/3 or less in comparison. Accordingly, it is possible to suppress an increase in the sliding resistance of the pile 32 to the photosensitive drum 11 due to an increase in the number of highly rigid hair fall prevention fibers.

[0032] Since the hair fall prevention fiber is a fiber such as toner or paper powder, which is charged to the same polarity as the powder, the scraped powder adheres to the fiber surface and the photosensitive drum 11 can be prevented from being attached again.

By using a non-conductive fiber as the hair fall prevention fiber, the amount of the conductive fiber whose production cost is increased can be reduced, and the production cost of the brush 30 can be suppressed.

The resistivity of the conductive fiber is 10 ⁸ Ω · c
By setting m or less, the conductivity of the pile 32 can be more favorably maintained. (Second Embodiment) Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings. The description of the second embodiment will focus on the differences from the first embodiment.

As shown in FIG. 4A, in the brush 30 as the conductive velor material of the second embodiment, the pile 3
Reference numeral 2 denotes a second pile row 32b arranged at the widthwise edge of the base cloth 31 on the left side in the figure, and the second pile row 32b is sequentially arranged from the second pile row 32b to the right in the figure. And three first pile rows 32a. And FIG.
As shown in FIG. 4B, the brush 30 is moved backward (downward in FIG. 4B) in the rotation direction of the photosensitive drum 11 at a position where the brush 30 first contacts the rotating photosensitive drum 11.
It is attached so that the pile row 32b is arranged.

According to the brush 30, the second pile row 32b made of highly rigid hair falling prevention fibers is arranged at the edge which comes into contact with the photosensitive drum 11 for the first time. No. 32 can maintain the state of raised hair at the edge on the side where hair falls. For this reason, the fallen second pile row 32b is replaced with the first pile row 32.
a is not pressed in the rotation direction of the photosensitive drum 11,
Hair fall of the first pile row 32a is prevented.

Therefore, according to the brush 30 of the second embodiment, the number of the first pile rows 32a made of conductive fibers is increased more than that of the brush 30 of the first embodiment.
Can be improved in conductivity. In addition, even if the second pile row 32b is only one row, by arranging it on the edge that is the side that first comes into contact with the rotating photosensitive drum 11, the pile 32 is chained from this part. Falling can be suppressed.

The present embodiment can be embodied with the following modifications. The first pile row 32a and the second pile row 32b do not necessarily have to have the same height. The first pile row 32a made of conductive fibers can contact the movable body, and the second pile row 32b has the second pile row 32b. The height of the second pile row 32b may be lower than that of the first pile row 32a as long as the fall of the hairs of the one pile row 32a can be prevented.
That is, for example, as shown in FIG. 5, in the pile 32 of the brush 30 of the first embodiment, the height of the second pile row 32b may be half the height of the first pile row 32a. . Even in the case of such a configuration, the pile 32 can sufficiently prevent the hair from falling down, and the contact area between the first pile row 32a and the photosensitive drum 11 increases, thereby improving the conductivity of the pile 32. be able to.

In the first and second embodiments, the first
The pile 32 is formed by providing the pile row 32a and the second pile row 32b in total of four rows. However, the pile 32 is not limited to this, and the pile pile 32a and the second pile row 32b are combined. Two or three rows,
Alternatively, the pile 32 may be formed by providing five or more rows. Also, the first pile row 32a and the second pile row 3
When five rows or more are provided in total, the second pile rows 32b may be provided at the center and intermediate portions other than both ends in the width direction of the base cloth 31.

The brush 30 is not limited to being attached only to the cleaning unit 17, but may be provided, for example, on the housing 14 a of the developing unit 14, the housing 12 a of the charging unit 12, and the charge removing unit 18. Or
The movable body may be a transfer belt for transferring the recording paper 16 to the transfer unit 15, and the brush 30 may be provided so that the bristle tip of the pile 32 is slid on the transfer belt. Alternatively, the brush 30 may be attached to the photosensitive drum 11, the transfer belt, or the like, which is a movable body.

For example, at least one of the coating layer 33 and the sticking layer 34 of the brush 30 may be omitted, and the base cloth 31 and the pile 32 may constitute a conductive velor material. For example, the pile 32 may be formed by forming a pile row by pile-weaving a plurality of pile yarns obtained by twist-twisting hair fall prevention fibers and conductive fibers. When twisting the hair fall prevention fiber and the conductive fiber, the hair fall prevention fiber may be conductive or non-conductive. In such a configuration, it is not necessary to separately pile-pile the pile yarn made of the hair fall prevention fiber and the pile yarn made of the conductive fiber, and the productivity of the brush 30 can be improved.

Further, the technical ideas that can be grasped from the above embodiment will be described below. The conductive velor material according to any one of claims 1 to 3, wherein the hair fall prevention fibers are charged to the same polarity as the granular material. With such a configuration, it is possible to suppress the powder and granules from adhering to the hair fall prevention fibers.

The second pile row is disposed both forward and backward in the moving direction of the movable body in the direction in which the conductive fibers fall on the base material. 3. The conductive velor material according to any one of 3. With such a configuration, hair fall of the conductive fiber can be more effectively prevented.

The conductive velor material according to any one of claims 1 to 3, wherein the hair fall prevention fiber is formed of a non-conductive fiber. With this configuration, it is possible to prevent the production cost of the conductive velor material from increasing.

The resistivity of the conductive fiber is 10 ⁸ Ω
The conductive velor material according to any one of claims 1 to 3, wherein the conductive velor material is set to be not more than cm. With such a configuration, the conductivity of the pile can be more favorably maintained.

The conductive velor material according to any one of claims 1 to 3, wherein the conductive fiber is a fluorine fiber. With this configuration, the sliding resistance of the conductive fiber with respect to the movable body or the support can be reduced.

The conductive fiber according to any one of claims 1 to 3, wherein the hair fall prevention fiber is a conductive fiber, and its specific resistivity is set to 10 ⁸ Ω · cm or less. Velor wood. With such a configuration, the conductivity of the pile can be more favorably maintained.

The conductive velor material according to any one of claims 1 to 3, wherein the hair fall prevention fiber has an apparent Young's modulus of 1,000 to 200,000 MPa. With this configuration, the pile flexibility can be effectively maintained while favorably supporting the conductive fibers.

[0049]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, hair fall can be suppressed while maintaining good conductivity and flexibility of the pile.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), it is possible to effectively maintain the strength and flexibility of the pile, suppress the sliding resistance to the movable body or the support body, and effectively suppress hair fall.

According to the invention described in claim 3, according to claim 1
Or, in addition to the effect of the invention described in claim 2, by using the hair fall prevention fiber, it is possible to suppress an increase in sliding resistance of the pile to the movable body or the support.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a brush according to a first embodiment.

FIG. 2 is a sectional view showing the brush of the first embodiment.

FIG. 3 is a conceptual diagram illustrating an image forming apparatus.

FIG. 4A is a cross-sectional view illustrating a brush according to a second embodiment, and FIG. 4B is a conceptual diagram illustrating a state in which the brush is in sliding contact with the surface of a photosensitive drum.

FIG. 5 is a sectional view showing another type of brush.

[Explanation of symbols]

11: a photosensitive drum as a movable body; 17a: a housing as a support; 30: a brush as a conductive velor material; 31: a base cloth as a base material; 32: a pile;
1st pile row, 32b ... 2nd pile row.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03G 21/06 G03G 21/00 340 F term (Reference) 2H003 BB11 CC06 2H034 BD03 BD04 2H035 AA14 3B202 AA30 AA34 AB03 BB01 BC01 BE09 DA10 EA01 EE04 EG16 GA01 GA02 4L048 AA13 AA14 AA17 AA24 AB01 AB06 AB11 AC13 BA23 CA05 CA15 DA35

Claims (3)

[Claims] 1. A movable body or a movable body thereof, which comprises a velor formed of a base material and a plurality of piles of fibers raised on the base material, and which comes into contact with the granular material in the image forming apparatus. A conductive velor material configured such that the pile is in contact with the support or the movable body in a state where the pile is attached to the support opposed to the movable body, and the pile extends parallel to a direction intersecting with the moving direction of the movable body A plurality of pile rows, and a first pile row formed of conductive fibers;
It is formed of hair fall prevention fibers for supporting the conductive fibers and maintaining the hair in a raised state, and is disposed on at least one of the front and rear in the moving direction of the movable body in the direction in which the conductive fibers fall on the base material. A conductive velor material comprising: 2. The conductive fiber has a thickness per single fiber of 2 to 20 dtex, and the hair fall prevention fiber has a thickness per single fiber of 5 to 50 dtex. 4. The conductive velor material according to claim 1. 3. The method according to claim 1, wherein the number of the hair fall preventing fibers in a predetermined area is larger than 0 and less than or equal to 2/3 of the number of conductive fibers in a predetermined area. The conductive velor material according to claim 2.