JP4691259B2 - Conductive velor material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a conductive velor for forming, for example, a brush used for scraping off toner adhering to a photosensitive drum, charging the surface of a photosensitive drum, or removing electricity in an image forming apparatus. It relates to materials.
[0002]
[Prior art]
Conventionally, the conductive velor material as described above is composed of a velor formed by a base fabric made of a woven fabric and a plurality of piles formed by bundling fibers raised on the base fabric. Then, for example, the pile tip of the pile is attached to a predetermined location in the image forming apparatus so as to contact the movable body such as a photosensitive drum rotatably supported in the image forming apparatus with a certain pressure. It has been. The above-mentioned pile of conductive velor material is such that, for example, powder particles such as toner adhering to the surface of the photosensitive drum are negatively charged or positively charged. In order to make it easy to scrape off, it is formed from conductive fibers. Further, the conductive fiber is made of a flexible fiber having a low sliding resistance, so that the surface of the movable body is prevented from being damaged by the pile tips contacting with a constant pressure.
[0003]
[Problems to be solved by the invention]
However, a pile using flexible fibers as described above is easily deformed, and the hair falls due to continued sliding contact with the surface of the movable body. And the pile in the state where the hair fell has a problem that the hair tip 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 pile difficult to deform by making the fiber thicker or harder. In this case, the sliding resistance of the pile against the movable body is increased. There is a problem that the surface of the movable body may be damaged by the slidable hair tips.
[0004]
The present invention has been made paying attention to such problems existing in the prior art. An object of the invention is to provide a conductive velor material that can suppress the falling of the hair while maintaining good conductivity and flexibility of the pile.
[0005]
[Means for Solving the Problems]
  In order to achieve the above object, the conductive velor material according to claim 1 is based on a velor formed of a base material and a plurality of piles formed by bundling fibers raised on the base material. In the image forming apparatus, the conductive velor material is configured such that the pile contacts the support or the movable body in a state where the pile is attached to the movable body that contacts the granular material or the support that faces the movable body. The pile is formed from a plurality of pile rows extending in parallel to the direction intersecting the moving direction of the movable body, and the pile rows are formed of conductive fibers and support the conductive fibers. And keep it raisedThe same length as the first pile rowA second pile row formed of at least one of the front and rear in the moving direction of the movable body, which is formed of hair fall prevention fibers and is a direction in which the conductive fibers fall on the base material, To do.
[0006]
  According to a second aspect of the present invention, in the conductive velor material according to the first aspect, the second pile row is arranged in front and rear in the moving direction of the movable body, which is the direction in which the conductive fibers fall on the base material. It is the gist to arrange in both.
The gist of the invention described in claim 3 is that, in the conductive velor material according to claim 1 or 2, the hair fall-preventing fibers of the second pile row are made of non-conductive fibers.
According to a fourth aspect of the present invention, in the conductive velor material according to any one of the first to third aspects, the hair fall-preventing fibers in the second pile row have the same polarity as that of the granular material. The main point is that it is made of the following fibers.
[0007]
  According to a fifth aspect of the present invention, in the conductive velor material according to any one of the first to fourth aspects, compared to the thickness of the conductive fiber per single fiber, the single unit of the hair fall-preventing fiber is provided. The gist is that the thickness per fiber is thick.
In invention of Claim 6, in the electroconductive velor material of any one of Claim 1 thru | or 5, the number in the predetermined area of the said hair fall prevention fiber is in the predetermined area of an electroconductive fiber. The main feature is that it is larger than 0 and 2/3 or less compared to the number of the above.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
[0009]
As shown in FIGS. 1 and 2, the brush 30 as the conductive velor material of the first embodiment includes a base cloth 31 as a synthetic resin base material having a rectangular shape when viewed from above, and the base cloth 31. It is comprised by the velor which consists of the pile 32 formed so that it brushed up. A coating layer 33 made of a synthetic resin coating agent is provided on the back surface of the base fabric 31, and the base of the pile 32 and the base fabric 31 are joined. An adhesive layer 34 is provided on the back surface of the coating layer 33, and the adhesive layer 34 allows the brush 30 to be attached to a movable body or a support in the image forming apparatus.
[0010]
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. As the base fabric 31 in this embodiment, a woven fabric configured by weaving warp yarns 31a and weft yarns 31b made of polyester fibers is used.
[0011]
The pile 32 is formed by providing a first pile row 32a and a second pile row 32b, each extending in parallel in the length direction of the base fabric 31 in a total of four rows. In each drawing, the first pile row 32a is drawn darkly in order to easily show the arrangement of the first pile row 32a and the second pile row 32b. The first pile row 32 a is formed of conductive fibers and is disposed at the center in the width direction of the base fabric 31. The second pile row 32b is formed of hair fall-preventing fibers, and is disposed at both edges in the width direction of the base fabric 31 so as to sandwich the first pile row 32a from both sides.
[0012]
The conductive fibers forming the first pile row 32a are made of fibers having conductivity, high durability and flexibility, and good sliding properties. This conductive fiber has a specific resistivity of 10⁸It is preferably set to Ω · cm or less. Specific resistivity is 10⁸If it is greater than Ω · cm, the effect of removing static electricity may not be sufficiently exhibited. The conductive fiber in this embodiment is an acrylic fiber in which carbon as a conductive substance is kneaded at the raw yarn stage [trade name SA-7 manufactured by Toray, specific resistance is 10²-10^FourΩ · cm]. The conductive fiber has a specific resistivity of 10^-2-10⁸More preferably, it is set within the range of Ω · cm, and the specific resistivity is 10^-2If it is less than Ω · cm, the fibers that have fallen off the pile 32 may adhere to the high voltage portion in the image forming apparatus, causing a short circuit and causing a failure.
[0013]
Examples of fibers that satisfy 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. Among these, a fluorine fiber is more preferable because of its low friction coefficient. As a method for imparting conductivity to the fibers mentioned above, a conductive part in which a conductive substance is kneaded in the raw yarn stage or a conductive substance is kneaded into 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 no conductive material is kneaded and a method of coating the fiber surface with a processing liquid containing a conductive material 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.
[0014]
The hair fall-preventing fibers forming the second pile row 32b are made of fibers having high durability and rigidity and good sliding properties. 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. Moreover, as for the hair fall prevention fiber, that whose apparent Young's modulus is in the range of 1000-200000 MPa is preferable. When the apparent Young's modulus of the hair fall-preventing fiber is less than 1000 MPa, the hair fall-preventing fiber tends to fall down and it becomes difficult to support the conductive fibers in a raised state, and when it exceeds 200,000 MPa, the flexibility of the pile 32 decreases. If the sliding resistance is increased, the surface of the movable body or the support body may be damaged.
[0015]
In addition, the hair fall prevention fiber prevents powder particles charged negatively or positively in the image forming apparatus from adhering to the fiber surface. It is preferable to use a material having the same polarity as the granular material. In this way, when the hair fall prevention fiber is configured to be charged to the same polarity as the powder body, the powder body is less likely to adhere to the surface of the hair fall prevention fiber. It is possible to prevent the body from reattaching to the movable body or the support body.
[0016]
The above-mentioned hair fall-preventing fibers do not necessarily have conductivity, and may be made conductive by using the above-mentioned conductive substances or may remain non-conductive depending on the use site or purpose of use. Are used properly. Moreover, when using the fiber which has electroconductivity as a hair fall prevention fiber, the specific resistance is 10 similarly to the electroconductive fiber of the 1st pile row 32a.^-2-10⁸It is preferable to set to Ω · cm. The hair fall-preventing fiber in this embodiment is formed from non-conductive modacrylic fiber [trade name Kanecaron manufactured by Kaneka Chemical Co., Ltd.], and the toner of the image forming apparatus, which is a granular material, has a negative polarity. They are charged to the same polarity. And the conductive fiber which forms the 1st pile row | line | column 32a is supported from the both sides by the 2nd pile row | line | column 32b which consists of a hair fall prevention fiber, and a napped state is maintained.
[0017]
The bellows forming the pile 32 is obtained by pile weaving, warp knitting, electrostatic flocking or the like. The pile 32 of this embodiment forms a first pile row 32a by pile weaving a plurality of pile yarns formed by bundling conductive fibers on the base fabric 31, and a plurality of bundles formed by bundling hair fall-preventing fibers. Is obtained by forming the second pile row 32b by pile weaving. The pile weaving is a method of weaving the pile yarn forming the pile 32 so as to be entangled with the weft yarn 31b of the base fabric 31, and the method of entwining the pile yarn includes U weave, W weave, etc. Or it is properly used according to the purpose of use. In this embodiment, the pile yarn forming the pile 32 is woven so as to be entangled with the weft yarn 31b of the base fabric 31 in a U shape.
[0018]
Moreover, when forming a pile yarn using an electroconductive fiber, it is preferable that the electroconductive fiber sets the thickness per single fiber in the range of 2-20 dtex. When the thickness of the conductive fiber per single fiber is less than 2 decitex, the strength of the conductive fiber is lowered and the hair is likely to be broken, and when it is thicker than 20 decitex, the flexibility is lowered and the sliding resistance is increased. There is a risk. The pile yarn made of conductive fibers of this embodiment is formed such that a single fiber having a thickness of about 7 dtex is twisted and the thickness is 330 dtex / 48 filament.
[0019]
In addition, when the pile yarn is formed using the hair fall-preventing fibers, it is preferable that the hair fall-prevention fibers have a thickness per single fiber within a range of 5 to 50 dtex. When the thickness per single fiber of the hair fall-preventing fiber is less than 5 dtex, the rigidity is lowered and the hair falls easily, so it is difficult to keep the conductive fibers in a raised state, and when it is thicker than 50 dtex, Flexibility may be reduced, and sliding resistance may increase. 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 is thicker than the pile yarn made of the conductive fiber. If the pile yarn made of the hair fall prevention fiber is thinner than the pile yarn made of the conductive fiber, it becomes difficult to support the pile yarn made of the conductive fiber with the pile yarn made of the hair fall prevention fiber. The pile yarn made of the hair fall-preventing fibers of this embodiment is formed such that a single fiber having a thickness of about 11 dtex is twisted and the thickness becomes 560 dtex / 50 filament.
[0020]
When the pile 32 is formed, the number of conductive fibers woven in the pile is 25.4 mm.²It is preferable to set it to 10,000-300,000 within the area of. 25.4mm²When the number of piles woven within an area of less than 10,000, the conductivity of the pile 32 cannot be exhibited satisfactorily, and even if the number exceeds 300,000, the conductivity of the pile 32 is further improved. do not do.
[0021]
It is preferable to set the number of the pile fall-preventing fibers so that the number of piles woven within a predetermined area is 2/3 or less as compared with the number of piles woven within the predetermined area of the conductive fibers. 4mm²It is preferable to set the number in the area of 6000 to 200,000. If the number of hair fall prevention fibers in the predetermined area is more than 2/3 compared to the number of conductive fibers, the overall sliding resistance of the pile 32 may increase. 25.4mm²When the number of piles woven within the area of less than 6000 is less than 6,000, it becomes difficult to support the conductive fibers, and even if the number exceeds 200,000, the function of supporting the conductive fibers is not further improved. In this embodiment, the hair fall prevention fiber is 25.4 mm.²About 50,000 hairs are planted in the area of the conductive fiber, 25.4mm²About 100,000 pieces of hair are planted within the area, and the number of hair fall-preventing fibers within a predetermined area is set to be about ½ compared to the number of conductive fibers.
[0022]
Examples of the coating agent that forms the coating layer 33 include rubber-based solvent adhesives such as styrene-butadiene copolymer rubber, ethylene-acrylic acid ester copolymers, ethylene-vinyl acetate copolymers, and polymethyl methacrylate. The adhesive resin is used. These coating agents are infiltrated between the warp yarn 31a and the weft yarn 31b forming the base fabric 31 to firmly hold the roots of the yarns 31a, 31b and the pile 32, and fray the yarns 31a, 31b. Is preventing. Although the brush 30 has sufficient conductivity only with the pile 32, the conductivity of the pile 32 can be more satisfactorily exhibited by imparting conductivity to the coating layer 33. The coating agent preferably has conductivity. Examples of a method for imparting conductivity to the coating layer 33 include a method of kneading the above-described conductive material into a coating agent.
[0023]
The adhesive layer 34 has no core material, or has a core material, and a pressure sensitive adhesive having an adhesive applied on both sides thereof is used. Further, the adhesive layer 34 is preferably conductive as in the coating layer 33. The adhesive layer 34 of this embodiment has a thin film made of aluminum as a core material 34a, and a double-sided pressure-sensitive adhesive tape (Teraoka Seisakusho) coated with an acrylic pressure-sensitive adhesive 34b having conductivity on the front and back surfaces of the core material 34a. Product name Conductive aluminum foil double-sided tape, No. 791).
[0024]
The brush 30 is used by being attached 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 the surface thereof can be charged. Around the photosensitive drum 11, a charging unit 12, an exposure device 13, a developing unit 14, a transfer unit 15, a cleaning unit 17, and a charge eliminating unit 18 are disposed in order from the upper position toward the rotation direction. The surface of the photosensitive drum 11 is charged by the charging unit 12 when rotated, and after an electrostatic latent image is formed by the exposure device 13, the developing brush 14b is rotatably supported in the housing 14a of the developing unit 14. Toner is supplied from. Then, a visible image of toner as a granular material is transferred to the recording paper 16 supplied between the photosensitive drum 11 and the transfer unit 15 by the transfer unit 15. 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 eliminating unit 18.
[0025]
The housing 17a constituting the cleaning unit 17 has a rectangular box shape having an opening on the front surface, and a support 17b is disposed inside the housing 17a so as to face the photosensitive drum 11. The brush 30 is attached to and supported by the support 17b so as to block the space between the support 17b and the photosensitive drum 11, and the toner remaining on the surface of the photosensitive drum 11 is scraped off by the brush 30. The scraped toner is collected from the collection port 24 in the housing 17a to the inside.
[0026]
Next, the operation of the brush 30 will be described below.
Now, as shown in FIG. 3, the brush 30 is joined to the housing 17 a of the cleaning unit 17 via the adhesive layer 34 so that the pile 32 contacts the photosensitive drum 11. At this time, the brush 30 is disposed so that the first pile row 32 a and the second pile row 32 b forming the pile 32 extend in a direction orthogonal to the rotation direction of the photosensitive drum 11. Furthermore, the second pile row 32b is disposed so as to be positioned in front of and behind the rotation direction of the photosensitive drum 11 with respect to the first pile row 32a.
[0027]
In this state, the toner remaining on the surface of the photosensitive drum 11 is brought into sliding contact with 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, static electricity charged in the toner is supplied to the first pile row 32a and discharged to the outside, so that the toner is discharged. The The discharged toner is scraped off by the brush 30 and stored in the housing 17a.
[0028]
In the brush 30, the pile 32 tends to fall down due to deterioration over time, an increase in the number of printed sheets, or the like. At this time, since the highly durable and rigid fibers are used for the hair fall-preventing fibers forming the second pile row 32b, the second pile row 32b is prevented from falling and the second row of the first pile row 32b is prevented from falling. The first pile row 32a supported so as to be sandwiched between the two pile rows 32b is prevented from falling down, and the entire pile 32 is prevented from falling down. Further, by forming the pile 32 from the second pile row 32b made of high-rigidity anti-falling fibers and the first pile row 32a made of highly flexible conductive fibers, the pile 32 is good as a whole. The surface of the photosensitive drum 11 is prevented from being damaged by the sliding contact of the pile 32.
[0029]
The effects exhibited by the first embodiment will be described below.
The pile 32 of the brush 30 is formed of two rows of the first pile row 32a and the second pile row 32b that extend in parallel with the length direction of the base fabric 31, respectively. The first pile row 32 a is formed of highly flexible conductive fibers, and is disposed at the center in the width direction of the base fabric 31. And the 2nd pile row | line | column 32b which consists of a strong strength fall prevention fiber is arrange | positioned at the both ends edge of the width direction of the base fabric 31 so that these 1st pile row | line | columns 32a may be pinched | interposed from both sides. For this reason, the first pile row 32a made of conductive fibers allows the pile 32 to maintain good conductivity and flexibility, and when the hair falls due to an increase in the number of printed sheets, changes with time, etc. By supporting the first pile row 32a that is about to fall down while the second pile row 32b made of the hair fall-preventing fibers maintains a raised state, the fall of the pile 32 can be suppressed.
[0030]
The conductive fibers forming the first pile row 32a have a thickness per single fiber set within a range of 2 to 20 dtex, and the hair fall-preventing fibers forming the second pile row 32b are The thickness per single fiber is set within the range of 5 to 50 dtex. For this reason, the rigidity and flexibility of the pile 32 can be maintained satisfactorily, and the hair fall can be effectively suppressed while the sliding resistance to the photosensitive drum 11 is kept low.
[0031]
-When the pile 32 is formed, the number of the hair fall-preventing fibers forming the second pile row 32b is woven in a predetermined area compared to the number woven in a predetermined area of the conductive fiber. It is set to be 2/3 or less. 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 fibers that are charged with the same polarity as the powder particles, such as toner and paper powder, are used as the hair fall prevention fibers, the powder particles scraped off on the fiber surface adhere to the photosensitive drum 11 again. It can prevent adhering.
[0033]
-By using a nonelectroconductive fiber for a hair fall prevention fiber, the usage-amount of the electroconductive fiber with which manufacturing cost increases can be reduced, and it can suppress that the manufacturing cost of the brush 30 increases.
[0034]
・ The specific resistivity of the conductive fiber is 10⁸By setting the resistance to Ω · cm or less, the conductivity of the pile 32 can be better maintained.
(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings. The second embodiment will be described with a focus on differences from the first embodiment.
[0035]
As shown in FIG. 4A, in the brush 30 as the conductive velor material of the second embodiment, the pile 32 is disposed at the edge in the width direction of the base cloth 31 on the left side in the drawing. The second pile row 32b of the row and three first pile rows 32a arranged in order from the second pile row 32b in the right direction in the drawing are formed. As shown in FIG. 4B, the brush 30 is located behind the rotating direction of the photosensitive drum 11, which is the first contact position with the rotating photosensitive drum 11 (downward in FIG. 4B). The second pile row 32b is pasted so as to be arranged.
[0036]
Now, according to the brush 30, the pile 32 is formed by disposing the second pile row 32 b made of high-rigidity hair fall-preventing fibers on the edge that is the first contact side with the photosensitive drum 11. It becomes possible to maintain the raised state at the edge on the side where the falling of the hair starts. Therefore, the second pile row 32b that has fallen down does not press the first pile row 32a in the rotation direction of the photosensitive drum 11, and the first pile row 32a is prevented from falling down.
[0037]
Therefore, according to the brush 30 of 2nd Embodiment, the electroconductivity of the pile 32 can be improved by increasing the 1st pile row | line | column 32a which consists of conductive fibers rather than the brush 30 of 1st Embodiment. In addition, even if there is only one second pile row 32b, it is arranged on the edge that comes into contact with the rotating photosensitive drum 11 first, so that the pile 32 can be chained from this portion. It can suppress falling down.
[0038]
In addition, this embodiment can also be changed and embodied as follows.
The first pile row 32a and the second pile row 32b do not necessarily have the same height, the first pile row 32a made of conductive fibers can contact the movable body, and the second pile row 32b The first pile row 32a may be formed so that the height of the second pile row 32b is lower than that of the first pile row 32a as long as the hair fall 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 such a configuration, the pile 32 can be sufficiently prevented from falling down, and the contact area between the first pile row 32a and the photosensitive drum 11 is widened to improve the conductivity of the pile 32. be able to.
[0039]
In the first and second embodiments, the pile 32 is formed by providing four rows in total including the first pile row 32a and the second pile row 32b. However, the present invention is not limited to this. The pile 32 may be formed by providing the pile row 32a and the second pile row 32b in combination of two or three rows, or providing five or more rows. Further, when five or more first pile rows 32a and second pile rows 32b are provided, the second pile rows 32b may be provided at the center portion and the middle portion in addition to the both end edges in the width direction of the base fabric 31. Good.
[0040]
The brush 30 is not limited to being attached only to the cleaning unit 17, and may be provided, for example, in the housing 14 a of the developing unit 14, the housing 12 a of the charging unit 12, or the charge removing unit 18. Alternatively, the movable body may be a transfer belt that transports the recording paper 16 to the transfer unit 15, and the brush 30 may be provided so that the bristles of the pile 32 are in sliding contact with the transfer belt. Or you may affix the brush 30 to the photosensitive drum 11 which is a movable body, a transfer belt, etc. FIG.
[0041]
For example, at least one of the coating layer 33 and the adhesive layer 34 of the brush 30 may be omitted, and the conductive velor material may be configured by the base cloth 31 and the pile 32.
For example, the pile 32 may be formed by pile weaving a plurality of pile yarns obtained by cross-twisting hair fall-preventing fibers and conductive fibers to form a pile row. Further, when the hair fall prevention fiber and the conductive fiber are twisted, the hair fall prevention fiber may be conductive or non-conductive. When configured in this manner, it is not necessary to separately weave the pile yarn made of the hair fall prevention fibers and the pile yarn made of the conductive fibers, and the productivity of the brush 30 can be improved.
[0042]
Further, the technical idea that can be grasped from the embodiment will be described below.
The conductive velor material according to any one of claims 1 to 3, wherein the hair fall-preventing fibers are charged with the same polarity as the powder particles. When comprised in this way, it can suppress that a granular material adheres to a hair fall prevention fiber.
[0043]
The second pile row is disposed both on the front side and the rear side in the moving direction of the movable body, which is the direction in which the conductive fibers fall on the base material. Conductive velor material according to crab. When comprised in this way, the fall of a conductive fiber can be prevented more effectively.
[0044]
The conductive velor material according to any one of claims 1 to 3, wherein the hair fall-preventing fibers are formed from non-conductive fibers. When comprised in this way, it can prevent that the manufacturing cost of an electroconductive velor material increases.
[0045]
The specific resistivity of the conductive fiber is 10⁸The conductive velor material according to any one of claims 1 to 3, wherein the conductive velor material is set to Ω · cm or less. When comprised in this way, the electroconductivity of a pile can be maintained more favorably.
[0046]
The conductive velor material according to any one of claims 1 to 3, wherein the conductive fiber is a fluorine fiber. When comprised in this way, the sliding resistance with respect to the movable body or support body of an electroconductive fiber can be reduced.
[0047]
-The above-mentioned hair fall prevention fiber is a conductive fiber, and its specific resistance is 10⁸The conductive velor material according to any one of claims 1 to 3, wherein the conductive velor material is set to Ω · cm or less. When comprised in this way, the electroconductivity of a pile can be maintained more favorably.
[0048]
The conductive velor material according to any one of claims 1 to 3, wherein the hair fall-preventing fiber has an apparent Young's modulus of 1000 to 200000 MPa. When comprised in this way, the softness | flexibility of a pile can be maintained effectively, supporting a conductive fiber favorably.
[0049]
【The invention's effect】
As described in detail above, the present invention has the following effects.
According to the first aspect of the present invention, it is possible to suppress the falling of the hair while maintaining the conductivity and flexibility of the pile.
[0050]
  Claim 2-6According to the invention described inIn addition to the effect of the invention described in claim 1, a more preferable conductive velor material can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a brush according to a first embodiment.
FIG. 2 is a cross-sectional view showing the brush of the first embodiment.
FIG. 3 is a conceptual diagram illustrating an image forming apparatus.
4A is a cross-sectional view illustrating a brush according to a second embodiment, and FIG. 4B is a conceptual diagram illustrating a state where the brush is in sliding contact with the surface of the photosensitive drum.
FIG. 5 is a cross-sectional view showing another embodiment of the brush.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Photosensitive drum as a movable body, 17a ... Housing as a support body, 30 ... Brush as a conductive velor material, 31 ... Base fabric as a base material, 32 ... Pile, 32a ... First pile row, 32b ... First 2 pile rows.

Claims (6)

A velor formed of a base material and a plurality of piles formed by bundling fibers raised on the base material,
A conductive velor material configured such that the pile contacts the support or the movable body in a state of being attached to the movable body that contacts the granular material or the support opposite to the movable body in the image forming apparatus,
The pile is formed from a plurality of pile rows extending in parallel to a direction intersecting the moving direction of the movable body, and the pile rows are formed from conductive fibers,
In order to support the conductive fiber and keep it in a raised state, the movable fiber is formed of a hair fall prevention fiber formed in the same length as the first pile row, and the movable fiber is in a direction in which the conductive fiber falls on the base material. A conductive velor material comprising: a second pile row disposed at least one of the front and rear in the body movement direction. 2. The conductive velor material according to claim 1, wherein the second pile row is disposed both on the front side and the rear side in the moving direction of the movable body, which is a direction in which the conductive fibers fall on the base material. . The conductive velor material according to claim 1 or 2, wherein the hair fall-preventing fibers of the second pile row are made of non-conductive fibers. The conductive velor material according to any one of claims 1 to 3, wherein the hair fall-preventing fibers of the second pile row are made of fibers having the same polarity as the powder particles. 5. The conductive material according to claim 1, wherein a thickness per single fiber of the hair fall prevention fiber is formed thicker than a thickness per single fiber of the conductive fiber. Sex velor material. 6. The number of the hair fall prevention fibers in a predetermined area is larger than 0 and 2/3 or less as compared with the number of conductive fibers in the predetermined area. The conductive velor material according to claim 1.

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