JP2010139979A - Velour material, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a velour material for suppressing falling of each pile even when all piles are made of flexible fiber, and also to provide a method of manufacturing the velour material. <P>SOLUTION: A cleaning brush 30 is provided with: base fabric 31 formed by weaving warp threads 31a and woof threads 31b; and a plurality of piles 32 that are woven in the base fabric 31 and erected on the base fabric 31. A non-erected region R where the piles 32 are not erected is formed in a central part on the base fabric 31. The piles 32 are arranged symmetrically with respect to the non-erected region R, and tilted to the side of the non-erected region R. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to, for example, a charging brush for charging a photosensitive drum in an image forming apparatus, a static eliminating brush for removing static electricity from a charged photosensitive drum, a cleaning brush for scraping off and removing toner or paper dust attached to the photosensitive drum, and the like. The present invention relates to a velor material and a method for producing the velor material.

Conventionally, as a velor material used for a brush in an image forming apparatus, the one shown in Patent Document 1 is known. The velor material of Patent Document 1 is formed such that a plurality of pile rows are formed on a base fabric along a direction orthogonal to the width direction, and the tips of the piles constituting each pile row are in sliding contact with the photosensitive drum. The brush is used as a brush that scrapes off the toner adhering to the surface of the photosensitive drum. Such brushes generally require the following two characteristics. One is that it is desirable that the pile always contacts the surface of the photosensitive drum at a constant pressure in order to maintain the toner scraping performance, and therefore, the irregular pile collapse or disturbance does not occur. One is that the pile is flexible and has low sliding resistance so as not to damage the surface of the photosensitive drum.
JP 2002-209634 A

  By the way, the velor material of patent document 1 has comprised the pile row | line | column of the both ends in the width direction with the fiber with high rigidity. These pile rows are configured to support other pile rows made of flexible fibers located between the two pile rows from both sides in the width direction so as not to fall down. For this reason, although it is possible to make each pile row difficult to fall down, there is a case where it is impossible to prevent the surface of the photosensitive drum from being damaged due to the presence of the pile row composed of highly rigid fibers.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a velor material and a velor material manufacturing method capable of making each pile difficult to fall even if all the piles are made of flexible fibers.

  In order to achieve the above object, the invention described in claim 1 includes a base fabric made of woven yarn, and a plurality of piles woven on the base fabric and standing on the base fabric. The velor material has a non-standing area where the pile is not erected on the base fabric, and the piles are arranged symmetrically across the non-erected area, The gist is that it is inclined to the standing region side.

  According to the above configuration, the corresponding piles on both sides across the non-standing region support each other on the non-standing region, so that it is difficult for the piles to fall down even if all the piles are configured with flexible fibers. Is possible.

  The invention according to claim 2 is the invention according to claim 1, in which the yarn farther from the non-standing region among the two yarns directly sandwiching each pile in the inclination direction of each pile is the The gist is that the length of the portion that is continuously exposed on the base fabric and contributes to the tightening of each pile is longer than the yarn closer to the non-standing region.

  According to the above configuration, there is a difference in the tightening force with respect to each pile between the two yarns directly sandwiching each pile in the inclination direction of each pile. That is, the tightening force acting on each pile from two yarns is more effective in the direction of the non-standing region side than in the direction opposite to the non-standing region side in the inclination direction of each pile. growing. For this reason, it is possible to easily incline the piles toward the non-standing area only by changing the weaving method of the yarns constituting the base fabric.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the one of the two yarns directly sandwiching each pile in the inclination direction of each pile is far from the non-standing region. The gist of this is that the yarn is thicker than the yarn closer to the non-standing region.

  According to the above-described configuration, a difference in the tightening force for each pile occurs between the two yarns by providing a difference in thickness between the two yarns directly sandwiching each pile in the inclination direction of each pile. It becomes like this. That is, since the tightening force acting on each pile becomes larger as the thread becomes thicker, the tightening force acting in the direction of the non-standing region rather than the tightening force acting in the direction opposite to the non-standing region side in the inclination direction of each pile The power is greater. For this reason, even if the weaving method of the yarn constituting the base fabric is a simple plain weave, each pile can be easily inclined toward the non-standing region side.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the piles are arranged in a staggered manner along a direction orthogonal to the inclination direction of the piles. It is a summary.

  According to the above configuration, when the piles on both sides sandwiching the non-standing region are inclined toward the non-standing region, the outer piles easily enter the gaps between the inner piles. For this reason, it becomes possible to suppress that each inner pile becomes a hindrance when inclining each outer pile.

The gist of the invention according to claim 5 is that, in the invention according to any one of claims 1 to 4, each pile has conductivity.
According to the above configuration, since static electricity does not easily accumulate in each pile, it is possible to suppress adhesion of foreign matter such as powder particles and dust to each pile due to static electricity.

  According to a sixth aspect of the present invention, there is provided a non-standing area where no pile is erected on a base fabric made of woven yarn, and a plurality of piles are arranged symmetrically with respect to the non-standing area. When standing up by weaving on a base fabric, among the two yarns directly sandwiching each pile in a direction orthogonal to the extending direction of the non-standing region, the yarn farther from the non-standing region The gist is that each pile is inclined toward the non-standing region so that the force with which each pile is tightened is greater than the force with which each pile is tightened by the yarn closer to the non-standing region. And

  According to the above configuration, the force by which each pile is tightened in the direction of the non-standing region side by the yarn is larger than the force by which the pile is tightened in the direction opposite to the non-standing region side in the inclination direction of each pile. Therefore, each pile can be easily inclined to the non-standing region side.

  According to a seventh aspect of the present invention, there is provided a non-standing region where piles are not erected on a base fabric made of woven yarn, and a plurality of piles are arranged symmetrically with respect to the non-erected region. The gist is provided with a weaving step for weaving and standing on a base fabric, and a heat pressing step for pressing each pile against the non-standing region side while applying heat to each pile.

  According to the above configuration, each opened pile is pressed toward the non-standing region while being applied with heat, so that the opening of each pile can be effectively suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, even if it comprises all the piles with a flexible fiber, the manufacturing method of a velor material and the velor material which can make each pile hard to fall down can be provided.

Hereinafter, an embodiment in which a velor material of the present invention is embodied in a cleaning brush used in an image forming apparatus will be described with reference to the drawings.
As shown in FIG. 1, in the image forming apparatus 10, the photosensitive drum 11 is rotatably supported by a support shaft 11a and is configured to be able to be charged on the surface thereof. Around the photosensitive drum 11, a charging unit 12, an exposure unit 13, a developing unit 14, a transfer unit 15, a cleaning unit 16, and a charge removal unit 17 are sequentially arranged from the upper position along the rotation direction (clockwise in FIG. 1). It is arranged.

  The surface of the photosensitive drum 11 is charged by the charging unit 12 during rotation. After the electrostatic latent image is formed on the charged surface by the exposure unit 13, the developing unit is formed on the surface on which the electrostatic latent image is formed. From 14, toner that is fine powder particles is supplied and adhered. Then, after the transfer unit 15 transfers the visible image with toner onto the recording paper 18 supplied between the photosensitive drum 11 and the transfer unit 15, the toner remaining on the surface of the photosensitive drum 11 is removed by the cleaning unit 16. The charge remaining on the surface of the photosensitive drum 11 is erased by the charge eliminating unit 17.

  The cleaning unit 16 includes a housing 16a having a substantially square box shape, and the side of the housing 16a facing the photosensitive drum 11 is open. A support plate 19 is provided in the upper part of the housing 16a so as to face the photosensitive drum 11. A cleaning brush 30 as a velor material is attached to a surface of the support plate 19 facing the photosensitive drum 11 so as to close a gap between the support plate 19 and the photosensitive drum 11.

  The cleaning brush 30 has a plurality of piles 32, and each pile 32 is in sliding contact with the surface of the photosensitive drum 11. Therefore, the toner remaining on the surface of the photosensitive drum 11 is scraped off by the piles 32 of the cleaning brush 30, and the scraped toner, paper dust, and the like are recovered from the recovery port 16b in the housing 16a. .

Next, the configuration of the cleaning brush 30 will be described in detail.
As shown in FIGS. 2 and 3, the cleaning brush 30 includes a base cloth 31 made of a woven cloth having a rectangular shape in plan view, and a plurality of piles 32 woven into the base cloth 31 so as to form a substantially U shape. And a plurality of piles 32 erected on the base fabric 31. A non-standing region R, which is a region where the piles 32 are not erected on the base fabric 31, extends along the longitudinal direction at the center in the short direction on the base fabric 31.

  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 each pile 32 and the base fabric 31 are firmly joined by the coating layer 33. An adhesive layer 34 is provided on the back surface of the coating layer 33, and the cleaning brush 30 is attached to the support plate 19 of the cleaning unit 16 in the image forming apparatus 10 by the adhesive layer 34.

  A woven fabric made of a material having high durability and flexibility is used for the base fabric 31. Examples of such a material include polyester, polypropylene, acrylic resin, polyamide, and urethane resin. As the base fabric 31 of the present embodiment, a woven fabric configured by weaving warp yarns 31a and weft yarns 31b made of polyester fibers is used.

  As shown in FIG.4 and FIG.5, each pile 32 on the base fabric 31 is arrange | positioned so that it may become symmetrical on both sides of the non-erection area | region R, and may incline to the non-erection area | region R side. That is, each pile 32 on the base cloth 31 extends in the longitudinal direction of the base cloth 31 along the center of the non-standing region R, and is symmetrical with respect to a center line L that bisects the base cloth 31 as an axis of symmetry. They are arranged so that In addition, each pile 32 arranged so as to form two rows on both sides across the non-standing region R on the base fabric 31 is the direction of the base fabric 31 that is orthogonal to the inclination direction of each pile 32. It is arranged in a staggered pattern along the longitudinal direction. Accordingly, four pile rows are formed by the piles 32 on the base fabric 31, and each pile row extends along the longitudinal direction of the base fabric 31 so as to be parallel to each other.

  As shown in FIG. 5, the warp yarn 31a farther from the non-standing region R out of the two warp yarns 31a directly sandwiching each pile 32 in the inclination direction of each pile 32 (short direction of the base fabric 31). The length of the portion that is continuously exposed on the base fabric 31 and contributes to the tightening of each pile 32 is longer than the warp yarn 31a closer to the non-standing region R. That is, in FIG. 5, the portion indicated by the oblique line A in the warp yarn 31a (the portion that contributes to the tightening of each pile 32) is the outer tightening portion 31aA that tightens each pile 32 toward the non-standing region R side. The portion indicated by the oblique line B in the yarn 31a (the portion contributing to the fastening of each pile 32) is an inner fastening portion 31aB that fastens each pile 32 toward the side opposite to the non-standing region R side, and each outer fastening portion 31aA. Is longer than the corresponding inner fastening portions 31aB.

  In other words, the outer tightening portion 31aA is sandwiched between the two weft threads 31b that are in contact with each pile 32 and are in contact with both ends of the outer tightening portion 31aA, and is sandwiched between the two weft threads 31b. Further, it is located above the two weft threads 31b and is exposed on the base fabric 31. On the other hand, the inner tightening portion 31aB is sandwiched between two weft yarns 31b that are in contact with each pile 32 and in contact with both ends of the inner tightening portion 31aB, and is sandwiched between the two weft yarns 31b. It is located above the weft 31b of the book and is exposed on the base fabric 31.

  Here, the fastening force applied to each pile 32 by the outer fastening part 31aA and the inner fastening part 31aB increases in proportion to the lengths of the outer fastening part 31aA and the inner fastening part 31aB. Therefore, the tightening force applied to each pile 32 by the outer tightening portion 31aA longer than the inner tightening portion 31aB is larger than the tightening force applied to each pile 32 by the inner tightening portion 31aB shorter than the outer tightening portion 31aA. Become. As a result, each pile 32 is inevitably inclined to the non-standing region R side having a sufficient space due to the difference between the tightening force applied from the outer tightening portion 31aA and the tightening force applied from the inner tightening portion 31aB. To do.

Moreover, each pile 32 is comprised with the electroconductive fiber which has electroconductivity, It is preferable to use what has durability and a softness | flexibility and was excellent in slidability for this electroconductive fiber. In the conductive fiber of this embodiment, an acrylic fiber (trade name; SA-7, manufactured by Toray Industries, Inc., made of carbon as a conductive substance at the raw yarn stage, having a specific resistivity of 10 ⁵ to 10 ⁸ Ω · cm. ) Is used. In addition, it is preferable that the specific resistance of the conductive fiber is set within a range of 10 ⁻² to 10 ⁸ Ω · cm. In the case where the specific resistivity is less than 10 ⁻² Ω · cm, the fibers that have fallen off from each pile 32 may adhere to a high voltage portion in the image forming apparatus 10, thereby causing a short circuit and causing a failure of the apparatus. If the specific resistivity is higher than 10 ⁸ Ω · cm, the effect of removing static electricity may not be sufficiently obtained. The range of specific resistivity is appropriately changed based on the design concept.

  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, polyamide fibers, acrylic fibers, polypropylene fibers, and polyester fibers. As a method for imparting conductivity to the various fibers mentioned above, a conductive material is kneaded at the raw yarn stage, or a conductive material is kneaded into one fiber by a melt spinning method or the like. There are a method of forming a multilayer structure having a portion and a non-conductive portion in which the conductive material is not kneaded, and a method of coating the fiber surface with a processing liquid containing the 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.

  Each pile 32 of the present embodiment is erected on the base fabric 31 by weaving a plurality of pile yarns obtained by bundling conductive fibers on the base fabric 31 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 31 b of the base fabric 31. There are U weaving, W weaving, and the like as a method for causing pile yarn to be entangled with the weft 31b of the base fabric 31. In the present embodiment, the pile yarns forming each pile 32 are woven so as to be entangled with the weft yarns 31b of the base fabric 31 in a U shape.

  Moreover, when forming a pile thread | yarn using an electroconductive fiber, it is preferable to set the thickness per single fiber of an electroconductive fiber in the range of 1-20 dtex. If the thickness of the conductive fiber per single fiber is less than 1 dtex, the strength of the conductive fiber may be reduced and hair breakage may occur easily. If the thickness is greater than 20 dtex, the conductive fiber There is a possibility that the flexibility with respect to lowering and the sliding resistance with respect to the photosensitive drum 11 will increase. The pile yarn made of conductive fibers according to the present embodiment is formed so that a single fiber having a thickness of about 7 dtex is twisted to have a thickness of 330 dtex / 48 filaments.

  When each pile 32 is erected on the base fabric 31, the number of conductive fibers woven in piles is preferably 10,000 to 300,000 per square inch. If the number of conductive fibers woven in a pile of 1 square inch is less than 10,000, the conductivity of each pile 32 may not be satisfactorily exhibited. On the other hand, even if the number of conductive fibers woven in a pile within a square inch is increased from 300,000, the conductivity of each pile 32 is not further improved.

  As shown in FIG. 3, as the coating agent for forming the coating layer 33, a rubber-based solvent-type adhesive such as styrene-butadiene copolymer rubber, an ethylene-acrylate copolymer, or an ethylene-vinyl acetate copolymer Adhesive resin such as polymethyl methacrylate is used. These coating agents are infiltrated between the warp yarns 31a and the weft yarns 31b forming the base fabric 31, firmly holding the roots of the yarns 31a, 31b and the piles 32, and the yarns 31a, 31b. Suppresses fraying. In the cleaning brush 30, each pile 32 has sufficient conductivity, but by imparting conductivity to the coating layer 33, the conductivity of each pile 32 can be exhibited better. The coating agent is preferably a conductive agent. Examples of a method for imparting conductivity to the coating layer 33 include a method of kneading the above-described conductive substance into a coating agent.

  For the adhesive layer 34, a pressure-sensitive adhesive that does not have a core material or has a core material and is coated with an adhesive on both sides thereof is used. Further, it is preferable to use a conductive layer for the adhesive layer 34 as in the coating layer 33. The adhesive layer 34 of the present embodiment is a double-sided pressure-sensitive adhesive tape (Teraoka Seisakusho Co., Ltd.) in which an aluminum thin film is used as a core material 34a and a conductive acrylic pressure-sensitive adhesive 34b is applied to the front and back surfaces of the core material 34a. Manufactured, trade name: conductive aluminum foil double-sided tape, No. 791).

Next, a method for manufacturing the cleaning brush 30 will be described.
When the cleaning brush 30 is manufactured, first, a non-standing region R where the piles 32 are not erected is formed in the central portion on the base fabric 31 formed by weaving the warp yarn 31a and the weft yarn 31b, and each pile. 32 is erected on the base cloth 31 in a U shape around the weft 31b so as to be symmetrically arranged across the non-standing region R.

  At this time, the force with which each pile 32 is tightened by the warp yarn 31a far from the non-standing region R out of the two warp yarns 31a directly sandwiching the pile 32 in the direction orthogonal to the extending direction of the non-standing region R Each pile 32 is inclined to the non-standing region R side so that the force is larger than the force with which the pile 32 is tightened by the warp yarn 31a closer to the non-standing region R.

  That is, the outer fastening portion 31aA is formed at a position adjacent to each pile 32 from the side opposite to the non-standing region R side, and the inner fastening portion 31aB is formed at a position adjacent to each pile 32 from the non-standing region R side. Then, each pile 32 is inclined toward the non-standing region R side. In this case, as described above, the force by which the outer fastening portion 31aA fastens each pile 32 to the non-standing region R side is greater than the force by which the inner fastening portion 31aB fastens each pile 32 to the side opposite to the non-standing region R side. Because of the large size, each pile 32 is inevitably inclined to the non-standing region R side having a sufficient space.

Then, the cleaning brush 30 is obtained by forming the coating layer 33 and the sticking layer 34 on the back surface of the base fabric 31.
Next, the operation of the cleaning brush 30 will be described.

  As shown in FIG. 1, the cleaning brush 30 is bonded to the support plate 19 in the housing 16 a of the cleaning unit 16 via the adhesive layer 34 such that each pile 32 is in sliding contact with the surface of the photosensitive drum 11. Is done. At this time, the cleaning brush 30 is disposed so that its longitudinal direction is parallel to the support shaft 11a.

  When the photosensitive drum 11 is rotated in this state, the toner remaining on the surface of the photosensitive drum 11 is scraped off by the piles 32 of the cleaning brush 30 and collected in the housing 16a. At this time, the toner is charged with static electricity, but since each pile 32 is formed of conductive fibers, the static electricity charged in the toner is discharged through each pile 32. Therefore, the toner scraped off by each pile 32 becomes difficult to adhere to each pile 32, and is thus efficiently collected in the housing 16a.

  Here, such a cleaning brush usually tends to cause each pile to fall down or open due to deterioration with time, increase in the number of printed sheets, or the like. In particular, when each pile is highly flexible or slidable, the surface of the photosensitive drum 11 is hardly damaged, but the hair falls and the hairs open more seriously.

  In this regard, in the cleaning brush 30 of the present embodiment, each of the piles 32 is composed of conductive fibers having both high flexibility and slidability. Since the piles 32 support each other on the non-standing region R, the piles 32 are unlikely to fall down, and hair fall and hair opening are effectively suppressed. For this reason, the toner scraping performance by the cleaning brush 30 is maintained well for a long period of time. In addition, since the same conductive fiber is used for each pile 32 of the cleaning brush 30, there is no difference in conductivity between the piles 32, and the piles 32 are uniformly distributed. Stable conductive performance can be exhibited.

According to the embodiment detailed above, the following effects are exhibited.
(1) The respective piles 32 of the cleaning brush 30 are arranged so as to be symmetric with respect to the non-standing region R located at the center of the base cloth 31, and are inclined toward the non-standing region R side. . For this reason, since the corresponding piles 32 on both sides of the non-standing region R support each other in a balanced manner on the non-standing region R, flexible conductive fibers having low sliding resistance against the surface of the photosensitive drum 11 are used. Even if all the piles 32 are configured, each pile 32 can be made difficult to fall, and the fall of each pile 32 and the opening of the hair can be effectively suppressed.

  (2) Each pile 32 is tightened in a state of being directly sandwiched between the outer tightening portion 31aA and the inner tightening portion 31aB in the inclination direction of each pile, and is located farther from the non-standing region R than the inner tightening portion 31aB. The length of a certain outer tightening portion 31aA is longer than the length of the inner tightening portion 31aB. For this reason, the force of tightening each pile 32 is stronger in the outer tightening portion 31aA than in the inner tightening portion 31aB. Therefore, each pile 32 can be easily inclined to the non-standing region R side only by changing (adjusting) the weaving method of the base fabric 31.

  (3) Since the piles 32 are arranged in a staggered manner along the direction orthogonal to the inclination direction of the piles 32, the piles 32 on both sides of the non-standing region R are placed on the non-standing region R side. When inclining, each pile 32 on the outer side (the side far from the non-standing region R) can easily enter the gap between the piles 32 on the inner side (side near the non-standing region R). For this reason, it can suppress that each inner pile 32 becomes a hindrance at the time of inclining each outer pile 32. FIG. That is, the outer piles 32 can be sufficiently inclined without causing the inner piles 32 to become obstacles.

  (4) Since each pile 32 is comprised with the electroconductive fiber, it can make it hard to accumulate static electricity in this each pile. For this reason, when the toner remaining on the surface of the photosensitive drum 11 is scraped off by each pile 32, it is possible to effectively suppress the toner from adhering to each pile 32 due to static electricity.

(Example of change)
In addition, the said embodiment can also be changed and actualized as follows.
-As shown in FIG. 6, you may change the manufacturing method of the cleaning brush 30 as follows. First, a non-standing region R in which each pile 32 is not erected is formed at the center of the base fabric 31 formed by plain weaving warp yarn 31a and weft yarn 31b, and each pile 32 is sandwiched between the non-erected region R. Then, the weft 31b is entangled in a U shape so as to be symmetrically arranged on the base fabric 31 (weaving step).

  After performing the weaving step, each pile 32 is pressed toward the non-standing region R side while applying heat to each pile 32 by the hot plate 40 (thermal pressing step). That is, a tunnel formed of the hot plate 40 is provided on the transfer table 41, and the piles 32 and the base cloth 31 formed by the weaving step are heated in the tunnel while heating the hot plate 40, and are transported along the longitudinal direction. As a result, each pile 32 opened in the short direction is corrected to the non-standing region R side with sufficient space. In this case, the side wall 40 a of the hot plate 40 is perpendicular to the base fabric 31. Then, the coating layer 33 and the sticking layer 34 are formed on the back surface of the base fabric 31. In this way, even if the base fabric 31 is composed of a simple plain woven fabric, each pile 32 opened in the short direction of the base fabric 31 is moved to the non-standing region R side by the side wall 40a of the hot plate 40. Since heat is applied while being pressed, the opening of each pile 32 can be effectively suppressed.

  The side wall 40a of the hot plate 40 shown in FIG. 6 may be inclined inward as shown in FIG. In this way, each pile 32 opened in the short direction of the base fabric 31 is applied with heat while being pressed more strongly toward the non-standing region R side by the side wall 40a of the hot plate 40. The opening of 32 can be further effectively suppressed.

  The length of the warp yarn 31a far from the non-standing region R among the two warp yarns 31a directly sandwiching the pile 32 in the inclination direction of each pile 32 is the warp yarn closer to the non-standing region R It may be thicker than 31a. In this case, the force for tightening each pile 32 toward the non-standing region R side becomes larger than the force for tightening each pile 32 toward the side opposite to the non-standing region R side. Even if the weave of the warp yarn 31a constituting the cloth 31 is a simple plain weave, each pile 32 can be easily inclined to the non-standing region R side.

  -If the length of each outer side fastening part 31aA is longer than the length of each corresponding inner side fastening part 31aB, the weaving method of the base fabric 31 is changed as appropriate, and each outer fastening part 31aA and each inner fastening part 31aB The length may be changed. However, the lengths of the outer tightening portions 31aA and the inner tightening portions 31aB are set to such an extent that the warp yarn 31a and the weft yarn 31b constituting the base fabric 31 will be loosened if they are too long. There is a need to.

  -Each pile 32 does not necessarily need to be comprised with an electroconductive fiber. That is, all the fibers constituting each pile 32 may be non-conductive fibers, or may include both non-conductive fibers and conductive fibers.

The piles 32 are not necessarily arranged in a staggered manner along the longitudinal direction of the base fabric 31.
The velor material may be used not only as the cleaning brush 30 but also as a charging brush for charging the photosensitive drum 11 or a neutralizing brush for removing static electricity from the charged photosensitive drum 11. Alternatively, the velor material may be used for applications other than the image forming apparatus 10, such as an etiquette brush or a rotary brush for a vacuum cleaner.

1 is a schematic configuration diagram illustrating an image forming apparatus according to an embodiment. The perspective view which shows the cleaning brush of embodiment. Sectional drawing which shows the cleaning brush of embodiment. In embodiment, the simplified sectional view which shows the arrangement | positioning state of each pile on a base fabric. In embodiment, the simplified perspective view which shows the standing state of each pile on a base fabric. In the example of a change, the simplified figure which shows the state at the time of pressing each pile to the non-erection area | region side, providing heat. In the example of a change, the simplified figure which shows the state at the time of pressing each pile to the non-erection area | region side, providing heat.

Explanation of symbols

  30 ... Cleaning brush as velor material, 31 ... Base cloth, 31a ... Warp yarn, 31b ... Weft yarn, 32 ... Pile, R ... Non-standing region.

Claims (7)

A velor material comprising a base fabric made of woven yarn, and a plurality of piles woven on the base fabric and standing on the base fabric,
A non-standing area where the pile is not erected is formed on the base fabric,
The velor material is characterized in that the piles are arranged symmetrically with respect to the non-standing area and are inclined toward the non-standing area. Of the two yarns directly sandwiching each pile in the direction of inclination of each pile, the yarn farther from the non-standing region is continuous on the base fabric than the yarn closer to the non-standing region. The velor material according to claim 1, wherein a length of a portion which is exposed and contributes to tightening of each pile is increased. Of the two yarns directly sandwiching each pile in the direction of inclination of each pile, the yarn farther from the non-standing region is thicker than the yarn closer to the non-standing region. The velor material according to claim 1 or 2. The velor material according to any one of claims 1 to 3, wherein the piles are arranged in a staggered manner along a direction orthogonal to an inclination direction of the piles. Each said pile has electroconductivity, The velor material as described in any one of Claims 1-4 characterized by the above-mentioned. A non-standing region where no pile is erected is formed on a base fabric made of yarn, and a plurality of piles are woven and erected on the base fabric so as to be symmetrically arranged across the non-erected region When
Of the two yarns directly sandwiching each pile in the direction perpendicular to the extending direction of the non-standing region, the force that causes the pile to be tightened by the yarn farthest from the non-standing region is the non-standing direction. A method for producing a velor material, characterized in that each pile is inclined toward the non-standing region so as to be larger than a force by which the pile is tightened by a thread closer to the setting region. A non-standing region where no pile is erected is formed on a base fabric made of yarn, and a plurality of piles are woven and erected on the base fabric so as to be symmetrically arranged across the non-erected region Weaving step,
A method for producing a velor material, comprising: a heat pressing step of pressing each pile against the non-standing region side while applying heat to each pile.

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