JP4249041B2 - Rotating body sealing material and method of using the same, rotating body device, developing device, and image forming apparatus - Google Patents

Description

  The present invention relates to a sealing material for a rotating body that seals an end of a rotating body such as an image carrier when an image is formed by an electrophotographic method, a method of using the same, a rotating body device, a developing device, and an image forming apparatus. About.

  2. Description of the Related Art Conventionally, image formation using an electrophotographic method has been widely performed in printers, copying apparatuses, facsimile machines, and the like. When an image is formed using an electrophotographic image forming apparatus, a fine colored powder called toner is used as a developer. In the electrophotographic system, an electrostatic latent image is formed on an image carrier such as a photosensitive drum, developed with toner, transferred to a recording sheet, and the toner is fixed on the recording sheet. The toner is stored in a container or the like of the developing unit, and moves to the surface of the photosensitive drum or the like while adhering to the outer peripheral surface of the developing roller. While the developing roller and the photosensitive drum rotate, toner is adhered to the outer peripheral surface thereof. The developing roller and the photosensitive drum are provided with a rotating body seal so that the toner does not leak, for example, outward in the axial direction.

  Conventionally, felt seals have been used as seals for rotating bodies. In the felt seal, a felt is placed on the surface of a foaming base material such as a sponge, and the felt surface is brought into contact with the outer peripheral surface of a developing roller or a photosensitive drum. In addition, a sealing material for a rotating body that uses a hollow fiber or a thread made of porous hollow fibers as a thread for a pile has been proposed (see, for example, Patent Document 1).

JP 2003-56713 A

  Although the sides of the developing roller and the photosensitive drum are prevented from leaking toner by side seals, sufficient sealing is difficult. If the toner leaks, the life after the toner is once filled in the container of the developing unit until the next filling is required is shortened, and the running cost is increased. Further, since the periphery of the developing unit is easily contaminated with the leaked toner, a cover or the like that prevents the contamination by the toner from spreading is necessary.

  For side seals, which are seals at the edges of conventional developing rollers and photosensitive drums, felt piles, sponges, seals with felts and sponges stacked, and loop pile yarns extending from pile fabrics are cut to form piles. Sealing materials raised as yarn are used. In the developing unit using the felt, Teflon (registered trademark) felt or the like having improved slidability is used. In the case of using a sponge, a silicon sponge having a high sealing property is used. However, because the toner is sealed with strong compression or strong pressing force to improve the adhesion to the developing roller, the torque for driving the developing unit to rotate is increased, and the gear of the transmission mechanism is worn or banded. This causes a phenomenon such as On the other hand, when the compression force is lowered, the toner enters the inside of the side seal or the like, and the printing quality is deteriorated due to contamination inside the apparatus due to the fall or scattering of the toner to other parts.

  In addition, when using a seal material in which the yarn is piled up and raised, if permanent yarn is used, if a yarn with thick fibers is used, the elastic force increases, and the torque required for driving increases, resulting in an increase in cost. It will rise. If the thickness of the fiber of the yarn is reduced, sufficient elasticity cannot be obtained and seal leakage occurs. Furthermore, when the gap at the base of the pile-shaped yarn becomes large, and toner that is powder enters the gap, there is a problem that the elasticity as the sealing material becomes too strong.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sealing member for a rotator that can perform sufficient sealing even when the driving torque is small, a method for using the same, a rotator device, a developing device, and an image forming apparatus.

The present invention is composed of a base fabric and a cut pile raised from the base fabric, and in a sealing material for a rotating body that seals an end of a rotating body that carries powder,
Yarn formed as the cut pile yarn by contraction textiles which shrinks by crimped fibers or heat crimping yarn or crimped hard yarn without crimp, and the heat has混織or commingled The cut pile of the sealing material is a sealing material for a rotating body characterized in that a yarn that does not shrink after heating and a yarn that has been crimped are mixed or woven .

In the present invention, the crimped fiber crimped by heat or the contracted fiber contracted by heat contained in the yarn formed as the cut pile is contracted in the root direction by heat.

  In the present invention, the yarn formed as the cut pile is beveled in the rotation direction of the rotating body.

  In the present invention, the yarn formed as the cut pile is characterized in that a hollow fiber or a porous hollow fiber yarn is mixed or woven.

  In the present invention, the yarn formed as the cut pile is characterized in that a conductive fiber yarn is mixed or mixed.

  Furthermore, the present invention is a method for using a sealing material for a rotating body, wherein the sealing material for a rotating body described in any one of the above is used for a portion having a step.

  Furthermore, the present invention is a rotating body device characterized in that the rotating body sealing material described in any one of the above is included as a side seal provided at an end portion of a rotating body that carries powder.

  Further, the present invention includes any one of the above-described sealing materials for a rotating body as a side seal provided at an end portion of a developing roller carrying a powdery developer used in an electrophotographic image forming apparatus. Is a developing device.

  In the invention, the side seal is integrated with a back seal at an end of a developer regulating member that regulates a layer thickness of the developer carried on the developing roller.

  Furthermore, the present invention includes any one of the above-described sealing materials for a rotating body as a side seal provided at an end of a carrier that carries a powdery developer used in an electrophotographic image forming apparatus. An image forming apparatus characterized by the above.

According to the present invention, portions of the fibers crimped by shrinkage fibers to shrink by crimped fibers or heat crimping by heat is small base of voids, also be used to seal against the powder of the rotating parts, powder It can be prevented from entering the root. Elasticity due to fiber shrinkage can also be used, and the powder does not enter the root, so the rebound resilience as a sealing material does not become too strong, maintaining proper elasticity, and with relatively low load between yarns airtightness becomes possible on the gel, even the driving torque is small can be carried out a sufficient seal.

  Further, according to the present invention, since the crimped fiber is included in the yarn formed as a cut pile, the tip can be used for sealing by raising from the base fabric, and the powder is sealed even at a low load. Can do.

  Further, according to the present invention, the crimped fiber contained in the yarn formed as the cut pile is shrunk in the root direction at the time of the cut pile formation or by heat, so that it does not shrink when weaving into a pile shape. Can be handled.

  Further, according to the present invention, the yarn formed as a cut pile is inclined in the rotational direction of the rotating body, so that the followability to the rotating body can be improved.

  Further, according to the present invention, the yarn formed as the cut pile is mixed or mixed with a yarn that is not crimped, a yarn that is not easily crimped, or a low-shrinkage yarn. Can be satisfactorily performed with a yarn that does not crimp, a yarn that does not easily crimp, or a low shrinkage yarn.

  Further, according to the present invention, the yarn formed as the cut pile is a hollow fiber or a porous hollow fiber yarn mixed or mixed, so that the rebound resilience at the hollow fiber or porous hollow fiber yarn portion. Is reduced, and sufficient sealing can be performed even if the compression load on the outer peripheral surface of the rotating body is small.

  According to the invention, since the yarn formed as a cut pile is mixed or woven with conductive fiber yarn, it becomes difficult to be triboelectrically charged even when used for sealing dynamic parts, Clogging due to body aggregation can be reduced.

  Furthermore, according to the present invention, since the sealing material for a rotating body having a good sealing property even at a low load is used for a portion having a step, the influence of the step is absorbed and the powder is moved in the axial direction. Sufficient sealing can be performed.

  Furthermore, according to the present invention, since the sealing material for a rotating body having a good sealing property even at a low load is included as a side seal provided at the end of the rotating body that carries the powder, Sealing can be performed sufficiently so that the powder does not leak.

  Furthermore, according to the present invention, a sealing material for a rotating body having a good sealing property even at a low load is included as a side seal provided at an end portion of a developing roller carrying a powdery developer used in an electrophotographic image forming apparatus. Therefore, it is possible to reduce the torque for rotationally driving the developing roller and the like. In addition, since the compressive force required for sufficient sealing is reduced, the frictional heat generated at the sliding portion is reduced even during high-speed rotation, the temperature rise is prevented, and the developer has heat-fusibility for fixing. Can be prevented from melting or solidifying.

  According to the invention, since the side seal is integrated with the back seal of the end of the developer regulating member that regulates the layer thickness of the developer carried on the developing roller, the end of the developer regulating member Therefore, it is possible to reduce the cost compared to combining the separate parts.

  Further, according to the present invention, a sealing material for a rotating body having a good sealing property even at a low load is included as a side seal provided at an end portion of a carrier that carries a powdery developer used in an electrophotographic image forming apparatus. Therefore, it is possible to sufficiently seal the developer in the image forming apparatus at a low cost.

  FIG. 1 shows a partial cross-sectional configuration of a developing device including a rotary member sealing material 1 as an embodiment of the present invention. The sealing material 1 for a rotating body is composed of a pile fabric in which pile yarns 3 are raised from the surface of a base fabric 2. The base fabric 2 is woven with weft and warp, and a part of the warp is raised as a pile yarn 3. The pile yarn 3 is provided with a crimped portion 4 so that a gap at the root can be reduced. The rotary member sealing material 1 is supported on the surface of the support plate 5, and the tip of the pile yarn 3 contacts the surface 6 a of the developing roller 6. The developing roller 6 rotates around the axis 7 a of the rotating shaft 7. The sealing material 1 for the rotator seals the toner 8 that is a powdery developer image attached to the surface of the developing roller 6.

  That is, the sealing material 1 for the rotator is a powdery developer carried by the developing roller 6 when the developing roller 6 provided in the developing unit in the electrophotographic image forming apparatus rotates about the rotation shaft 7. Used to seal a certain toner 8. The seal member 1 for the rotating body prevents the toner 8 from moving while closely contacting the outer surface of the developing roller 6 so that the toner 8 does not leak to the end in the direction of the axis 7a. The sealing material 1 for a rotating body is formed into a loop shape by pile weaving, and then the tip of the loop is cut to form a cut pile. The fluffed pile yarn 3 is slanted so as to incline in the rotation direction. Yes. A base fabric 2 is provided on the outer side in the radial direction of the sealing material 1 for the rotating body. A support plate 5 made of metal or hard synthetic resin is provided on the outer side of the base fabric 2. The rotating body sealing material 1 including the pile yarn 3 and the base fabric 2 and the support plate 5 constitute an end seal for the developing roller 6.

  FIG. 2 shows the relationship between the sealing material 1 for a rotating body shown in FIG. 1 and the outer peripheral surface of the developing roller 6. The rotating body sealing material 1 functions as a side seal type with respect to the outer peripheral surface of the developing roller 6. The rotating body sealing material 1 is in close contact with the outer peripheral surface of the developing roller 6, forms a toner layer 10 in the middle of the axial direction in accordance with the printing width, and has a blank portion 11 where no toner adheres to both ends in the axial direction. 12 is used. In order to regulate the thickness of the toner layer 10, a blade 13 is provided. The rotating shaft 7 of the developing roller 6 is rotatably supported by the housing of the developing unit 24, and toner is supplied to the toner layer 23 of the developing roller 6 from the inside of the developing unit 14. The thickness of the toner in the toner layer 10 is adjusted by the blade 13 which is a toner regulating member, and is kept below a certain level. By rotating the seal yarn 1 that forms a seal as a cut pile with the rotating body seal material 1 and inclining the slant in the rotation direction, the toner movement direction is aligned with the rotation direction, so that the toner does not move in the axial direction. can do.

  The pile yarn 3 of the sealing material 1 for a rotating body includes, as a material, a yarn made of crimped fibers or crimped fibers including contracted fibers. The rotary body sealing material 1 that seals the end of a rotary body such as a developing roller 6 that carries powder such as toner contains crimped fibers or yarns of crimped fibers including contracted fibers. The portion of the fiber or the contracted fiber due to the shrinkable fiber can reduce the gap at the root, and the powder such as toner can be prevented from entering the root. Elasticity due to fiber shrinkage can also be used, and the powder does not enter the root, so the rebound resilience as a sealing material does not become too strong, maintaining proper elasticity, and with relatively low load between yarns Airtightness can be raised, and sufficient sealing can be performed even if the driving torque is small.

  FIG. 3 shows a simplified partial configuration of the image forming apparatus including the developing unit 14 of FIG. In the developing unit 14 which is a developing device used for electrophotographic image formation, the toner 8 is supplied from the supply roller 15 to the developing roller 6. In order to apply a bias voltage to the developing roller 6 and the supply roller 15, DC power sources 16a and 16b are also provided. Note that the bias voltage is not limited to the DC voltage but may be superimposed with an AC voltage.

  In the image forming apparatus 20 of the present embodiment, development is performed to visualize the electrostatic latent image formed on the surface of the photosensitive drum 21 that is an image carrier with the toner 8. On the surface of the photosensitive drum 21, a layer of a photoconductor, which is a photoconductive insulator material that normally exhibits electrical insulation and exhibits conductivity when irradiated with light, is formed. The photosensitive drum 21 rotates in the rotation direction 21a, that is, in the clockwise direction of FIG. 3, and is provided with a charger 22 for charging the surface thereof. The developing unit 14 is provided on the downstream side of the charger 22 in the rotation direction 21a. The developing unit 14 includes a container 23 that stores the toner 8. The toner 8 in the container 23 is used for developing the photosensitive drum 21 through the supply roller 15 and the developing roller 6. By the development, an image of the toner 8 is formed on the outer peripheral surface of the photosensitive drum 21 according to the electrostatic latent image.

  With respect to the rotation direction 21a, on the downstream side of the developing unit 14, the recording paper 24 contacts the outer peripheral surface of the photosensitive drum 21, and a transfer device 25 is provided below the recording paper 24. An image of the toner 8 formed on the outer peripheral surface of the photosensitive drum 21 by development is transferred to the surface of the recording paper 24. A cleaner 26 is disposed on the upstream side of the charger 22 with respect to the rotation direction 21a. After the recording paper 24 comes into contact with the outer peripheral surface of the photosensitive drum 21, the recording paper 24 is conveyed to a fixing device 27 and heated and pressed by a ripening roller 28 and a pressure roller 29. The toner 8 image transferred onto the recording paper 24 is fused to the toner 8 and fixed on the surface of the recording paper 24.

  In electrophotographic image formation, when the light irradiation 30 is performed on the surface of the photosensitive drum 21 that is uniformly charged by the charger 22, the charge in the portion irradiated with the light disappears and an electrostatic latent image is formed. It is formed. The light irradiation 30 is, for example, a laser light beam whose intensity is modulated corresponding to an image to be recorded in a laser printer, and is reflected light from a document surface in a copying apparatus. From the developing unit 14, toner 8 that is a charged powder developer is supplied, and the electrostatic latent image on the surface of the photosensitive drum 21 is made visible. The toner 8 has high electrical insulation, and when the corona discharge having the opposite polarity to the toner 8 is performed from the transfer device 25, the toner on the surface of the photosensitive drum 21 is sucked and transferred to the surface of the recording paper 24. The toner transferred onto the recording paper 24 is once melted by the aging pressure of the fixing device 27 and then fixed to the surface of the recording paper 24. The toner 8 remaining on the surface of the photosensitive drum 21 is removed by the cleaner 26 so that charging by the charger 22 is not hindered.

  The developing unit 14 stores the toner 8 in the container 23 and supplies the toner 8 to the photosensitive drum 21 through the developing roller 6 that contacts the optical drum 21 through the opening 23a. A supply roller 15 is provided to efficiently adhere the toner 8 in the container 23 to the surface of the developing roller 6. The supply roller 15 conveys the toner 8 in the container 23 toward the developing roller 6 while stirring the toner 8 while being in contact with the developing roller 6. The thickness of the toner layer adhering to the outer periphery of the developing roller 6 that rotates relative to the container 23 of the developing unit 14 is regulated by the blade 13 that is a developer regulating member such that the thickness of the toner layer is below a certain level. In order to charge the toner 8, DC power supplies 31a and 31b are provided. In the DC power supplies 31a and 31b, in order to smoothly transfer the toner 8 from the supply roller 15 to the developing roller 6, the voltage applied to the supply roller 15 is set higher in the absolute voltage.

  FIG. 4 shows the concept of sealing the toner through the opening 23a of FIG. 3 with the rotary member sealing material 1 of FIG. In the sealing material 1 for a rotating body, the direction of the texture is directed to the direction of the texture. The direction of the weave is inclined 45 ° with respect to the rotation direction of the outer peripheral surface of the developing roller 6 as a rotating body, as indicated by a solid line arrow. That is, the cut pile is slanted in the direction of the warp, which is the direction of the weave, the tip of the cut pile is directed inward, and the toner attempts to go outside the container from the opening 23a as shown by the broken line. I try to stop it. The angle to bevel is preferably 45 to 60 °. When inclined in this way, followability to a rotating body such as the developing roller 6 can be improved. In addition, the direction of the inclined hair of a cut pile can also be made to incline with respect to a texture. If the cut pile is inclined with respect to the texture, it is not necessary to incline the texture. In any case, it is only necessary that the direction of the inclined hair of the cut pile is inward as indicated by an arrow. The inward angle may be greater than 0 ° and 90 ° or less.

  FIG. 5 schematically shows a cross-sectional structure of the sealing material 1 for a rotating body. The base fabric 2 is formed by, for example, an upper layer warp 31, a lower layer warp 32, and a weft 33. Of course, the number of warp layers can be three or more. The pile yarn 3 is wound around the weft indicated by A among the wefts 33. The pile yarn 3 is woven as a loop pile. The tip of the loop is cut to form a pile yarn 3 as a cut pile. The other wefts indicated by B, C, and D are aligned in the arrangement direction 33a so as to be inclined at an angle of about 45 ° to 60 °. Such inclined hairs can improve followability to a rotating body such as a developing roller.

FIG. 6 schematically shows the sealing material 1 for a rotating body according to the present embodiment in comparison with a conventional felt seal 40. In the sealant 1 for a rotating body shown in (a), since the tip of the thin pile yarn 3 is softly in contact with the surface 6a of the developing roller, the followability is good and the contact pressure can be reduced. For example, the fiber density is preferably about 43,000 per square centimeter (280,000 per square inch). The base portion of the pile yarns 3, since the crimped portion 4 is present, crowded contains the toner, impact resilience can be prevented from rising. In the felt seal 40 shown in (b), a layer of felt 42 is provided on the surface of a foam material 41 such as sponge. When the contact pressure is increased in order to improve the sealing performance, the toner aggregates in the felt 42 layer, the sealing performance is lowered, and toner leakage occurs.

  In the sealing material 1 for a rotator, since the crimped fiber is included in the pile yarn 3 formed in a pile shape, the tip can be used for sealing by raising from the base fabric 2, and the powder can be used even at a low load. Can be sealed. The shrinking property is known as a so-called bulky property, and is prominent in wool and the like. In a yarn bundled in a pile shape, a gap is likely to be formed at the root, but the gap at the root can be reduced by utilizing the bulkiness. Even with synthetic fibers, acrylic and polyester yarns can be crimped by utilizing thermoplasticity. Threads with high heat shrinkage ratio are used by mixing yarns with different heat shrinkability as π and 3, and using heating at the time of oblique hair after shearing, which cuts and separates the tip of the pile yarn 3 When the is shrunk at random, the voids at the root can be filled. It is possible to prevent the toner from entering the gap. The yarn that does not shrink is in a straight state and can regulate the flow of toner.

  In order to shrink the yarn, it is also possible to form a woven fabric in a state in which a yarn by heat and a yarn that has been pre-tensioned are mixed, and shrink the yarn during shearing.

FIG. 7 shows a hollow fiber 45 (a) and a porous hollow fiber 46 (b) which are preferably mixed with the pile yarn 3 of the sealing material 1 for a rotating body shown in FIG. It expands and shows. The hollow fiber 45 and the porous hollow fiber 46 have a hollow portion 47 at the axial center. In the porous hollow fiber 46, communication fine holes 48 communicating with the hollow portion 47 are also formed on the surface. Examples of the porous hollow fiber 46 in which a large number of fine holes are formed in the hollow fiber include, for example, a yarn made of acrylic fiber provided on the market by Kanebo Co., Ltd. under the registered trademark “Biosafe”. Can do. This acrylic fiber is kneaded with an antibacterial deodorant at the raw cotton production stage to provide antibacterial and deodorant effects. The applications for the purpose at the time of development, blankets, sheets, Ken bedding areas such as towels, curtains, interior areas such as carpet, underwear, tights, clothing areas such as sweaters, the behavior, such as materials fields such as filter various Gerare ing. Nylon hollow fiber is also used as a filter material for water purifiers.

  The hollow fiber 45 and the porous hollow fiber 46 are formed with a hollow part 47 at the center part leaving the outer periphery. The middle hollow portion 47 penetrates the entire fiber along the longitudinal direction. With this configuration, rebound resilience at the time of compression can be neglected.

  As the pile yarn 3, for example, a yarn of about 500 to 650D in terms of denier is used. The number of vertical piles is about 10-22. About 30% of the porous hollow fiber 46 described above, about 30% of crimped or shrinkable yarn, and about 40% of rayon yarn are used.

  That is, a yarn made of a crimped or shrinkable fiber is mixed or mixed with a yarn that does not crimp, a yarn that does not easily crimp, or a low-shrink yarn. Since the pile yarn 3 is woven or mixed with a yarn that is not crimped, a yarn that is not easily crimped, or a low-shrinkage yarn, the seal at the contact portion with the rotating body is a yarn that is not crimped and is not easily crimped. A yarn or a low shrinkage yarn can be used sufficiently. The crimped fiber contained in the pile yarn 3 is shrunk by heat. This heat can be reduced in the root direction by heating at about 170 ° C. in the oblique hair process by the polisher during pile formation or by independent heating. When weaving the pile yarn 3 in a pile shape, it can be handled in a non-shrinked state.

  Furthermore, the pile yarn 3 made of crimped fibers can be mixed or woven with conductive fiber yarns. If the conductive fiber yarn is mixed or woven, even if it is used for sealing a dynamic part, it becomes difficult to be triboelectrically charged, and clogging due to powder aggregation can be reduced.

  FIG. 8 shows a sealed state near one end of the developing roller 6 in the axial direction. The other end side has the same configuration. The developing roller 6 is rotatably supported on the housing 50 by a bearing 51 at both ends in the axial direction. 1 is provided as a side seal 52 at both ends of the outer peripheral surface of the developing roller 6 as side seals 52 so that toner does not leak to the outside from the portion of the bearing 51 provided on the side wall of the housing 50. The side seal 52 also serves as a back seal for the blade 53. The blade 53 is attached to the housing 50 via the attachment plate 54. The mounting plate 54 is fixed to the housing 50 with bolts 55. The back side of the blade 53 is also covered with a part of the side seal 52 to prevent toner leakage.

  FIG. 9 shows a cross-sectional configuration viewed from the right direction of FIG. FIG. 9A shows a state viewed from the cutting plane line AA in FIG. 4, and FIG. 9B shows a state viewed from the cutting plane line BB in FIG. Since the thin pile yarn 3 is used for the side seal 52, the driving torque is smaller than that of the conventional sealing material even with the same compression amount, and can be reduced to about 2/3. As shown in FIG. 9B, since the blade 53 sinks into the pile yarn of the side seal 53 and there is no space for the toner to enter, the step portion can be sufficiently sealed. Moreover, in the side seal 52 using the sealing material 1 for rotary bodies, the load of the blade 53 at the end can be reduced.

  FIG. 10 shows a state where an assembly in which the blade 53 is attached to the attachment plate 54 is attached in a state where the developing roller 6 and the side seal 53 are attached to the housing 50. FIG. 11 shows a state in which the developing roller 6 is separated from the assembly in which the blade 53 is attached to the attachment plate 54 from the state in which the side seal 52 is attached to the housing 50. FIG. 12 shows the external shape before the side seal 52 is attached. 12A shows a front view, and FIG. 12B shows a right side view.

  In each of the embodiments described above, the end of the developing roller 6 is sealed to prevent the toner 8 from leaking, but the same applies to the photosensitive drum 21 and other rotating body devices handling other powders. The present invention can be applied.

It is sectional drawing which shows the partial structure of the image development apparatus containing the sealing material 1 for rotary bodies as one Embodiment of this invention. FIG. 2 is a perspective view showing a relationship between a rotary member sealing material 1 shown in FIG. 1 and an outer peripheral surface of a developing roller 6. FIG. 3 is a cross-sectional view schematically showing a partial configuration of an image forming apparatus including a developing unit 14 in FIG. 2. FIG. 4 is a view showing a concept of sealing toner with an opening 23a in FIG. 3 with the sealing material 1 for a rotating body in FIG. 1; It is a figure which shows typically the cross-section of the sealing material 1 for rotary bodies of FIG. It is a figure which shows typically the sealing material 1 for rotary bodies of FIG. 1 compared with the felt seal 40 from the past. FIG. 2 is a partially enlarged view of a hollow fiber 45 and a porous hollow fiber 46 that are preferably used by being mixed with the pile yarn 3 of the sealing material for a rotating body 1 shown in FIG. 1. FIG. 2 is a partial front view showing a seal state in the vicinity of one end of the developing roller 6 in FIG. 1 in the axial direction. It is sectional drawing seen from the right direction of FIG. FIG. 9 is a partial front view showing a state in which an assembly in which a blade 53 is attached to an attachment plate 54 is attached in a state where the developing roller 6 and the side seal 53 are attached to the housing 50 in FIG. 8. FIG. 9 is a partial side cross-sectional view showing a state where an assembly product in which a blade 53 is attached to a mounting plate 54 and a developing roller 6 are separated from a state in which a side seal 52 is attached to the housing 50 in FIG. 8. It is the front view and right view which show the external shape before attachment of the side seal 52 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sealing material for rotary bodies 2 Base cloth 3 Pile yarn 6 Developing roller 7 Rotating shaft 8 Toner 13, 53 Blade 14 Developing unit 20 Image forming device 21 Photosensitive drum 45 Hollow fiber 46 Porous hollow fiber 52 Side seal

Claims (10)

In a sealing material for a rotating body , which is composed of a base fabric and a cut pile raised from the base fabric, and seals the end of the rotating body carrying powder.
Yarn formed as the cut pile yarn by contraction textiles which shrinks by crimped fibers or heat crimping yarn or crimped hard yarn without crimp, and the heat has混織or commingled The sealing material for a rotating body is characterized in that the cut pile of the sealing material is a woven or mixed fiber of yarn that does not shrink after heating and the yarn that has been crimped . Before shrinkable fiber to shrink by crimped fibers or thermally crimped by heat contained in the yarn being formed as asked Ttopairu is by heat, the rotating body of claim 1, wherein that shrinks the root direction Sealing material. The sealing material for a rotating body according to claim 1 or 2, wherein the yarn formed as the cut pile is beveled in a rotating direction of the rotating body . 4. The rotating body seal according to claim 1, wherein the yarn formed as the cut pile is a mixed fiber or a mixed fiber of hollow fibers or porous hollow fibers. 5. Wood. The thread is formed as a cut pile is rotated-body sealing material according to any one of claims 1-4, characterized in that the thread of the conductive fibers are混織or commingled. A method for using a sealing material for a rotating body, wherein the sealing material for a rotating body according to any one of claims 1 to 5 is used for a portion having a step. A rotating body device comprising the sealing material for a rotating body according to any one of claims 1 to 5 as a side seal provided at an end of a rotating body that carries powder. The sealing material for a rotating body according to any one of claims 1 to 5 is included as a side seal provided at an end portion of a developing roller carrying a powdery developer used in an electrophotographic image forming apparatus. A developing device. The developing device according to claim 8, wherein the side seal is integrated with a rear seal at an end of a developer regulating member that regulates a layer thickness of the developer carried on the developing roller. The rotary member sealing material according to any one of claims 1 to 5 is included as a side seal provided at an end of a carrier that carries a powdery developer used in an electrophotographic image forming apparatus. An image forming apparatus.

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