JP2005200811A - Method for producing seal woven fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a seal woven fabric, capable of efficiently producing the fabric used as a seal material of a rotor for sealing a powder. <P>SOLUTION: This method for producing the seal woven fabric includes a weaving step (step s1), shearing steps (steps 3 and 5), and a tilting step (step 7). Fiber threads for the fabric are given tension in the weaving step, so that the fiber threads containing fibers having crimping properties or shrinking properties are formed into a pile texture without being shrunk. The fiber threads of pile in the formed pile texture are cut into uniform length in the shearing steps. The fiber threads in the cut pile texture of a base fabric are lamellarly slid, while they are heated, and tilted toward a surface of the base fabric in the tilting step, so that the fibers which are contained in the fiber threads of the pile texture and have crimping properties or shrinking properties are shrunk. A directive function of guiding the powder toward tops of the fiber threads is given to the fabric, because the fiber threads in the cut pile texture are tilted. The fibers having the crimping properties or the shrinking properties are shrunk by heating, so as to be filled into voids formed in bottom areas of fibers having no crimping properties nor shrinking properties. Therefore, the shrunk fibers prevent the powder from penetrating into the voids. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for producing a sealing fabric used as 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 electrophotography.

  2. Description of the Related Art Conventionally, an image forming apparatus using an electrophotographic method has been widely used as a printer, a copying apparatus, a facsimile apparatus, or 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 sealing materials for 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 side of the developing roller and the photosensitive drum used in the electrophotographic image forming apparatus is designed to prevent the toner from leaking with a side seal, it is difficult to sufficiently seal it. 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.

  In the conventional image forming apparatus, the seal material used for the side seal at the end of the developing roller and the photosensitive drum is felt, sponge, a seal material in which felt and sponge are stacked, or a loop pile yarn extending from the pile fabric. Seals that are cut and raised as cut pile 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 in order to increase 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.

  The objective of this invention is providing the manufacturing method of the sealing fabric which can be efficiently manufactured as a sealing material for rotary bodies with respect to powder.

The present invention is a method for producing a sealing fabric used as a sealing material for a rotating body that seals an end of a rotating body that carries powder,
A weaving process in which a yarn including a crimped or shrinkable fiber and a fiber not having a crimp property is used as a hair yarn to produce a fabric of a pile structure while applying tension;
A shearing process to trim the pile length of the pile structure,
A slanting step of causing the cut pile to incline with respect to the surface of the base fabric by shifting the yarn of the base fabric in layers while being heated, and the crimping or shrinking fiber contained in the hair yarn to be crimped This is a method for producing a sealed fabric.

  In the present invention, the oblique hair process is included in the glossing process for the fibers that do not have crimpability or shrinkage.

  In the present invention, the polishing step is performed by heating a rotating roller cylinder in which a plurality of grooves inclined with respect to the axial direction are formed on the outer peripheral surface with a space therebetween.

  According to the present invention, a yarn including a fiber having crimped or shrinkable properties and a fiber not having a crimping property is used as a hair yarn, and a pile structure fabric is produced while tension is applied, and the pile length of the pile structure is trimmed. Therefore, the fiber having crimpability or shrinkage can also be woven as a pile having the same length as the fiber having no crimpability or shrinkage, and can be cut with the pile length aligned. In the slanting process, the yarn of the base fabric is shifted in layers to make the cut pile slant, so that the cut pile is slanted from the surface of the base fabric and is used along the tip of the hair when used as a sealant for rotating bodies. Thus, it is possible to provide a direction for guiding the powder. Since the fiber having crimpability or shrinkage contained in the hair yarn is shrunk by heating, it can fill the void at the base of the fiber not having crimpability or shrinkage and prevent the powder from entering. Since the cut pile that guides the powder is formed by slanting the fabric of the pile structure, it is possible to efficiently produce a sealing material having thin fibers extending obliquely from the surface and contracted fibers filling the roots. Can do.

  Further, according to the present invention, since the oblique hair process is included in the glossing process for fibers that do not have crimpability or shrinkage, the surface of the base fabric is used for fibers that do not have crimpability or shrinkage. The fibers having a crimping property or a shrinking property can be shrunk at the base.

  Further, according to the present invention, the polishing step is performed by heating a rotating roller type cylinder in which a plurality of grooves inclined with respect to the axial direction are formed at intervals on the outer peripheral surface. In addition, it is possible to make the fibers not having crimping property or shrinkage contained in the hair bevel and to shrink the fiber having crimping property or shrinkage property.

  FIG. 1 shows a schematic process procedure executed in a method for producing a sealed fabric according to an embodiment of the present invention. In step s1, a pile yarn yarn is mixed and formed. As the material of the hair yarn, a thin fiber such as rayon is used as a fiber that does not have crimps or shrinkage, and a fiber such as acrylic is used as a fiber that has crimps or shrinkage. Furthermore, it is preferable to mix porous hollow fibers. For example, 40% of 1.5D (denier) rayon fiber, 30% of 1.5D acrylic fiber, and 30% of 2-3D porous hollow fiber are mixed to form a hair yarn. Rayon fibers and acrylic fibers are ultrafine fibers having a thickness of 20 to 30 μm. In the next step s2, a pile fabric is produced by weaving wool yarns, for example, at a certain ratio with ground yarns, and weaving the ground wefts. Since a certain tension is applied to the warp yarn, a pile fabric can be produced without shrinking even if the hair yarn contains fibers having crimpability or shrinkage properties. For example, polyester and rayon are used as the warp of the ground, and polyester is used as the weft of the ground. For example, the hair yarn is woven into the base fabric at a high density of 280,000 or more per 2.54 mm square area. The woven pile fabric has a belt-like shape corresponding to the length of the warp and is wound on a roll.

  In step s3, shirring is performed in which the pile lengths of the pile portions are aligned and cut while the woven pile fabric is continuously rewound and wound up again. Hereinafter, each process is performed on the belt-shaped pile fabric until the die cutting in step s13. By this shearing, a cut pile having a uniform length can be obtained without shrinking even if the hair yarn contains crimped or shrinkable fibers. In step s4, all the hair removal for loosening the cut pile is performed. In step s5, shearing is performed so that the pile lengths of the cut piles are aligned. In step s6, the angle is split to incline the cut pile. In step s7, the step of polishing is performed as a process of slanting the fibers that do not have crimpability or shrinkage among the yarns of the hair that is a cut pile while heating, with the process of inclining against the surface of the base fabric. Do. At this time, the crimped or shrinkable fiber can be shrunk.

  In the next step s8, combing is performed on the cut pile that is beveled. In step s9, shearing is performed to align the pile lengths of the cut piles. In step s10, coating is performed by applying an adhesive on the back side of the base fabric. In step s11, the cut pile is further split with hair. In step s12, the pile length is further aligned by shearing. In step s13, die cutting as a sealing material is performed. In step s14, scraping is performed by removing scraps such as cut fibers from the cut pile portion, and the process procedure for manufacturing the sealing material is completed.

  FIG. 2 shows a partial cross-sectional configuration of the developing device including the rotating body sealing material 1 manufactured in the process of FIG. 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 in a loop shape by pile weaving, then the tip of the loop is cut to form a cut pile, and the raised 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. 3 shows the relationship between the rotary member sealing material 1 shown in FIG. 2 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. 4 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. 4, 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. 5 shows a concept of sealing toner with the opening 23a of FIG. 4 with the sealing material 1 for a rotating body of FIG. In the sealing material 1 for a rotator, the direction of the weave is inclined by, for example, 45 ° with respect to the rotation direction of the outer peripheral surface of the developing roller 6 or the like that is a rotator, as indicated by solid arrows. In the cut pile, the inward direction in which the interval from the both sides becomes narrower in the direction in which the outer peripheral surface of the rotating body such as the developing roller 6 moves in the direction of the weave is the direction of the inclined hair. As described above, the toner can be blocked from the opening 23a to the outside of the container as indicated by a broken line by using the inclined and inclined hair. It is to be noted that the oblique hair is inclined in a direction of 45 to 60 ° with respect to the surface of the base fabric 2 in the warp direction as the direction of the weave. The bevel can be inclined with respect to the direction of the weave. In such a case, the cut pile can be inclined inward without inclining the direction of the texture. Finally, the cut pile may be inclined inward in the range of more than 0 ° and not more than 90 °.

  FIG. 6 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. 7 schematically shows the sealing material 1 for a rotating body of this 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. The fiber density is preferably about 43,000 per square centimeter (280,000 per square inch), for example. Since the crimped portion 4 is present at the base portion of the pile yarn 3, it is possible to prevent the rebound resilience from increasing due to the toner entering. In the felt seal 40 shown in (b), a layer of felt 42 is provided on the surface of a foam 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.

  As described above, in this embodiment, the manufacturing method of the sealing fabric used as the sealing material 1 for the rotating body that seals the end of the rotating body that carries the powder includes the weaving process, the shearing process, and the oblique hair process. Including. In the weaving step, a yarn having a crimp structure or shrinkage and a yarn containing no fiber are used as the pile yarn 3 which is a hair yarn, and a fabric having a pile structure is produced while applying tension. Since tension is given to the yarn of the hair, the pile portion can be formed without shrinking even the fibers having crimpability or shrinkage. In the shearing step, the pile length of the pile structure is trimmed, so that the fiber having crimpability or shrinkage is cut to the same length as the fiber having no crimpability or shrinkage. In the slanting step, the yarn of the base fabric 2 is shifted in layers while heating, the cut pile is inclined with respect to the surface of the base fabric, and the crimped or shrinkable fibers contained in the pile yarn 3 are shrunk. . In the slanting process, the yarn of the base fabric 2 is shifted in layers so that the cut pile is slanted. Therefore, the cut pile is raised from the surface of the base fabric 2 and is used when the rotary sealant 1 is used. The directionality which guides powder along the tip can be given. If the pile yarn 3 is formed only with fibers that are not crimped or shrinkable, the powder enters the gaps at the roots, and the elasticity as the sealing material 1 for the rotator becomes too strong. Since the fiber having crimpability or shrinkage contained in the pile yarn 3 is shrunk by heating, it is possible to fill the void at the base of the fiber not having crimpability or shrinkage and prevent the powder from entering. Since the cut pile for guiding the powder is formed by slanting the fabric of the pile structure, the sealing material 1 for the rotating body having the thin fibers extending obliquely from the surface and the contracted fibers filling the roots is efficient. Can be manufactured well.

  FIG. 8 shows a schematic cross-sectional configuration of a pile fabric after the shearing process in step s3 of FIG. Compared to FIG. 6, there is no deviation between the upper layer portions of the upper warp 31 and the weft 33 of the base fabric 2, and the lower layer portions of the lower warp 32 and the weft 33, and the pile yarn 3 is almost the surface of the base fabric 2. Stands vertically. The pile yarn 3 can be tilted as shown in FIG. 6 by performing an angle for tilting the pile yarn 3 in the splitting process in step s6 of FIG. 1 and heating it in the polisher process of step s7.

  That is, the polisher process in step s7 in FIG. 1 includes a bevel process at the same time. The oblique hair process is included in the polisher process, which is a polishing process for fibers that do not have crimping or shrinking properties, so that the fibers that do not have crimping or shrinking properties are inclined from the surface of the base fabric 2. Thus, the fibers having crimps or shrinkage at the base can be shrunk.

  FIG. 9 shows a schematic configuration of the shearing device used in step s3, step s5, step s9 and step s12 in FIG. The sealing material 1 for a rotating body is supplied as a pile fabric wound in a roll shape, and passes through the rotary cutter 50 until it is continuously rewound and wound again in a roll shape. The tip of the pile yarn 3 is cut and aligned. The tip of the pressing member 51 is pressed against the back surface side of the rotation sealing material 1, and the surface of the base fabric 2 on which the pile yarn 3 is raised is brought close to the blade edge of the rotary cutter 50. By adjusting the position of the pressing member 51 with respect to the rotary cutter 50, the pile length to be aligned can be set.

  FIG. 10 shows a schematic configuration of an apparatus used in the splitting process shown in steps s4, s6, s8, and s11 in FIG. A large number of needles are implanted on the outer peripheral surfaces of the two needle rollers 61 and 62. One roller 61 with the needle rotates so that the tangential direction of the movement of the outer peripheral surface is opposite to the moving direction of the rotation sealing material 1. The other roller with needle 62 rotates such that the tangential direction of the movement of the outer peripheral surface is the same as the moving direction of the rotation sealing material 1. The pressing members 63 and 63 can approach or separate from the outer peripheral surfaces of the needle rollers 61 and 62, respectively. When the pressing members 63 and 64 are brought close to the rollers 61 and 62 with needles, respectively, the tips of the pile yarns 3 raised from the surface of the rotation sealing material 1 are caught by the needles, so that the hair can be split. When the pressing members 63 and 64 are moved away from the outer peripheral surfaces of the needle rollers 61 and 62, the rotation sealing material 1 is supported only by the support rolls 65 and 65, and the tip of the pile yarn 3 is attached to the needle rollers 61 and 62. Can be touched.

  FIG. 10A shows a state where the two pressing members 63 and 64 are brought close to the needle rollers 61 and 62, respectively, and both the needle rollers 61 and 62 are used for total hair removal. As step s6 in FIG. 1, it is desirable to repeat a plurality of times, gradually bringing the pressing members 63, 64 closer to the needle-attached rolls 61, 62 side, and gradually increasing the degree of total peptization. FIG. 10 (b) shows an angle-setting hair splitting process in which only the pressing member 63 approaches the needle-equipped roll 63. In FIG. 1, this corresponds to step s6. Since the needle moving at a relatively high speed acts on the pile yarn 3, the pile yarn 3 is pulled so as to be inclined, and the upper and lower layers of the base fabric 2 can be shifted. FIG. 10C shows a hair splitting process in which only the pressing member 64 is brought close to the needle roller 62 and combing is performed. This is performed in steps s8 and s11 in FIG.

  FIG. 11 shows a schematic configuration of the heating roll 70 used in the polisher process in step s9 of FIG. The outer surface of the heating roll 70 is heated to about 170 ° C., and grooves 71 that are inclined with respect to the axial direction are provided on the outer surface. For example, when the diameter of the heating roll 70 is about 400 mm, the grooves 71 having a width of about 30 to 40 mm are formed at a plurality of, for example, 4 to 5 locations at intervals on the outer peripheral surface of the heating roll 70. The heating roll 70 is originally performed to stretch the crimp of the pile yarn 3 and give a gloss effect.

  In the present embodiment, in the polisher process of FIG. 1 which is a polishing process, a rotating roller type cylinder in which a plurality of grooves inclined with respect to the axial direction are formed on the outer peripheral surface at intervals is heated. Therefore, it is possible to slant fibers that do not have crimps or shrinkage contained in the yarn of hair, and to shrink fibers that have crimps or shrinkage.

It is a process figure which shows the schematic process procedure performed with the manufacturing method of the sealing fabric which is one Embodiment of this invention. FIG. 2 is a cross-sectional view showing a partial configuration of a developing device including a rotating body sealing material 1 manufactured in the process of FIG. 1. FIG. 3 is a perspective view showing a relationship between a rotary member sealing material 1 shown in FIG. 2 and an outer peripheral surface of a developing roller 6. FIG. 4 is a cross-sectional view schematically showing a partial configuration of an image forming apparatus including a developing unit 14 in FIG. 3. FIG. 5 is a view showing a concept of performing toner sealing in the opening 23a of FIG. 4 with the sealing material 1 for a rotating body of FIG. It is a figure which shows typically the cross-sectional structure of the sealing material 1 for rotary bodies. It is a figure which shows typically the sealing material 1 for rotary bodies of FIG. 2 compared with the conventional felt seal 40. FIG. It is a figure which shows typically the cross-sectional structure of the pile fabric after completion | finish of the shearing process of step s3 of FIG. FIG. 2 is a simplified cross-sectional view illustrating a schematic configuration of a shearing device used in step s3, step s5, step s9, and step s12 in FIG. FIG. 2 is a simplified cross-sectional view showing a schematic configuration of an apparatus used in the splitting process shown in steps s4, s6, s8, and s11 of FIG. It is the simplified perspective view which shows the schematic structure of the heating roll 70 used for the polisher process in step s9 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sealing material for rotating bodies 2 Base cloth 3 Pile yarn 6 Developing roller 7 Rotating shaft 8 Toner 13 Blade 14 Developing unit 20 Image forming apparatus 21 Photosensitive drum 50 Rotary cutter 61, 62 Roll with needle 70 Heating roll

Claims (3)

A method for producing a sealing fabric used as a sealing material for a rotating body that seals an end of a rotating body that carries powder,
A weaving process in which a yarn including a crimped or shrinkable fiber and a fiber not having a crimp property is used as a hair yarn to produce a fabric of a pile structure while applying tension;
A shearing process to trim the pile length of the pile structure,
A slanting step of causing the cut pile to incline with respect to the surface of the base fabric by shifting the yarn of the base fabric in layers while being heated, and the crimping or shrinking fiber contained in the hair yarn to be crimped The manufacturing method of the sealing fabric characterized by the above-mentioned. The method for producing a sealed fabric according to claim 1, wherein the slanting step is included in a step of polishing the fibers that do not have crimp or shrinkage. 3. The seal according to claim 2, wherein the polishing step is performed by heating a rotating roller type cylinder in which a plurality of grooves inclined with respect to the axial direction are formed at intervals on the outer peripheral surface. A method of manufacturing a woven fabric.

Images