JP2008045255A - Heald and apparatus for producing fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heald capable of reducing warp yarn damage caused by friction even if progressed while making contact with warp yarn, and also an apparatus for producing a fabric having a high weaving property. <P>SOLUTION: This heald 11 is formed with a mail 12 which is an insertion hole for inserting the warp yarn, and has a column-formed supporting shaft 14 installed over to the mail 12 and a cylindrical sleeve 15 circumscribing the supporting shaft 14. Since the sleeve 15 is installed to be rotated by the progress of the contacting warp yarn, as the warp yarn progresses by making contact with the sleeve 15 equipped at the heald 11, the sleeve 15 can rotate by following the progress of the warp yarn. Thereby, even if the warp yarn is progressed while making a contact with the sleeve 15, the friction between the warp yarn and sleeve 15 is hardly formed and it is possible to reduce the damage of the warp yarn by the friction. Therefore, even if a spread yarn, etc., which is easily damaged by the friction, is used as the warp yarn, it is possible to reduce the formation of fluffs of the warp yarn. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heald used for opening movement in a loom and a fabric manufacturing apparatus that includes the heald and manufactures a fabric using a spread yarn or the like.

  Carbon fiber and glass fiber are used as a reinforcing material for fiber-reinforced composite materials in a woven fabric state. The carbon fiber is manufactured in a form in which a large number of carbon filaments are bundled into a flat ribbon shape. In the woven fabric, the warp and the weft are interlaced, and the bending of the fiber bundle is inevitable at the intersecting portion. Therefore, the stress concentration tends to occur at the bending portion, and the mechanical properties inherent to the fiber bundle tend to be impaired. A fiber bundle such as carbon fiber can be stretched thinly and flatly by a fiber opening process. If fabrics are manufactured using spread yarns that have undergone spread treatment, the degree of bending of the fiber bundle at the intersection of warp and weft is reduced, stress concentration is less likely to occur, and mechanical properties are reduced. Can be avoided.

  The fabric manufacturing apparatus that manufactures the fabric is configured to divide a plurality of warps up and down by opening movement by means of a hook such as a heald to form a shed, while passing the wefts sequentially through the shed and crossing the warps and wefts, Fabricate the fabric. When manufacturing fabrics using opened yarns, if the weaving movement that strikes the weft thread that has passed through the shed to the front of the weave, the flat cross-sectional shape of the opened yarn is broken and the width of the yarn is reduced. A flat woven fabric cannot be produced because the thickness is deformed so as to increase. For example, Patent Document 1 discloses a fabric manufacturing apparatus that manufactures a flat fabric using a spread yarn. The fabric manufacturing apparatus of Patent Document 1 holds the rear end of the woven fabric at a position away from the scissor means in the traveling direction with respect to the weaving direction, instead of providing the scissors for performing the scissoring movement. And a weaving front side gripping means capable of reciprocating between a position of the shed and a separated position away from the position of the shed toward the advancing side.

JP 2003-253547 A

  According to Patent Document 1, the woven fabric manufacturing apparatus does not hit the weft thread passed through the shed by the beating motion to the position before weaving, but moves the rear end of the woven fabric by the woven front side gripping means to the shed. Bring the passed wefts up to before weaving. Therefore, this fabric manufacturing apparatus can manufacture a flat fabric without damaging the flat cross-sectional shape of the spread yarn.

  However, when producing a woven fabric using a spread yarn that is easily damaged by friction and fuzzing easily, the warp proceeds in contact with the heald, and the warp is damaged by friction with the heald. May become fuzzy. For example, when moving the back end of the fabric by the weaving side gripping means or during the opening movement, when the warp is advanced while the warp is pulled strongly and pressed against the heald, the warp is It may be damaged and fuzzy by friction.

  An object of the present invention is to provide a heald that can reduce warp damage due to friction even when the warp is made to contact and advance, and to provide a fabric manufacturing apparatus with high weaving properties.

The present invention is formed with a warp insertion hole for inserting a warp,
A cylindrical support shaft provided across the warp insertion hole;
A cylindrical sleeve circumscribing the support shaft;
The sleeve is a heald characterized in that the sleeve rotates as the warp that contacts it advances.

  In the invention, it is preferable that at least one of the outer peripheral surface portion and the inner peripheral surface portion is made of polytetrafluoroethylene.

Further, the present invention is a woven fabric manufacturing apparatus that crosses a warp and a weft through a weft sequentially through a shed while forming a shed by dividing a plurality of warps vertically by opening movement by a heel means,
The textile manufacturing apparatus is characterized in that the wrinkle means is the heald.

According to the present invention, the heald is formed with a warp insertion hole for inserting a warp.
In the heald, a columnar support shaft is provided over the warp insertion hole, and a cylindrical sleeve circumscribes the support shaft. When manufacturing a woven fabric, the woven fabric manufacturing apparatus advances the warp and performs opening movement by the heald. The sleeve is rotated by the progress of the contact warp when manufacturing the fabric.

  By doing so, when the warp is in contact with the sleeve provided on the heald, the sleeve rotates following the progress of the warp. Therefore, even if the warp is brought into contact with the sleeve and advanced, Friction is less likely to occur between them, and warp damage due to friction can be reduced. Therefore, even if a spread yarn that is easily damaged by friction is used as the warp, the occurrence of fuzzing of the warp can be reduced.

  According to the invention, at least one of the outer peripheral surface portion and the inner peripheral surface portion of the sleeve is made of polytetrafluoroethylene. Polytetrafluoroethylene has a small coefficient of friction. When the outer peripheral surface portion is made of polytetrafluoroethylene, even if friction is generated between the sleeve and the warp, the generated friction force can be reduced. Further, when the inner peripheral surface portion is made of polytetrafluoroethylene, the frictional force generated between the support shaft and the sleeve can be reduced, so that the sleeve can be easily rotated as the warp advances.

  As described above, even if the warp is advanced while being in contact with the sleeve, damage to the warp due to friction can be further reduced.

  Further, according to the present invention, there is provided a fabric manufacturing apparatus for crossing a warp and a weft through a weft sequentially through a shed while forming a shed by dividing a plurality of warps vertically by opening movement by a heel means, The scissors means is the heald.

  By doing so, warp is damaged and fluff is less likely to occur, so that a high-quality woven fabric can be produced. Therefore, this fabric manufacturing apparatus has high weaving properties.

  The present invention is a heald provided in a fabric manufacturing apparatus, and is suitable for a heald for a fabric manufacturing apparatus that manufactures a fabric using a spread yarn such as a spread carbon fiber.

  FIG. 1 is a perspective view showing a heald 11 according to an embodiment of the present invention. FIG. 2 is a front view showing the heald 11. FIG. 3 is a cross-sectional view of the heald 11 as seen from the section line III-III in FIG.

  As shown in FIGS. 1 to 3, the heald 11 includes a heald main body 13 in which a mail 12 that is a warp insertion hole for inserting a warp is formed, a columnar support shaft 14 provided over the mail 12, and a support And a cylindrical sleeve 15 circumscribing the shaft 14. Two support shafts 14 that circumscribe the sleeve 15 are provided on the heald body 13 so as to be separated from each other, and warp passes between the two support shafts 14. When producing the woven fabric, the warp is advanced and the plurality of healds 11 are moved up and down to divide the warp passing through the healds 11 up and down to form a shed. Thus, when manufacturing the fabric, the warp advances in contact with the lower sleeve 15 when the heald 11 moves up, and advances in contact with the upper sleeve 15 when the heald 11 moves down. . The sleeve 15 may be provided so as to cover the entire surface in the circumferential direction of the support shaft 14. Furthermore, it is preferable that the support shaft 14 is provided so as to cover the entire surface in the axial direction.

  The hull body 13 does not have to be deformed by the vertical movement of the heald 11 and is formed of a metal such as stainless steel, for example. The support shaft 14 can be connected to the heald body 13 and does not have to be deformed by the vertical movement of the heald 11 or the like. For example, the support shaft 14 is made of a metal such as stainless steel.

  Since the sleeve 15 is provided so as to rotate as the contacted warp advances, the sleeve 15 rotates following the progress of the warp when the warp contacts the sleeve 15 provided in the heald 11 and advances. can do. Therefore, even if the warp is advanced while being in contact with the sleeve 15, friction does not easily occur between the warp and the sleeve 15, and damage to the warp due to friction can be reduced. Therefore, even if a spread yarn that is easily damaged by friction is used as the warp, the occurrence of fuzzing of the warp can be reduced.

  The sleeve 15 may be any one that rotates as the warp yarn that has contacted advances. It is preferable that at least one of the outer peripheral surface portion and the inner peripheral surface portion of the sleeve 15 is made of polytetrafluoroethylene. Polytetrafluoroethylene has a small coefficient of friction. When the outer peripheral surface portion is made of polytetrafluoroethylene, even if friction occurs between the sleeve 15 and the warp, the generated friction force can be reduced. Further, when the inner peripheral surface portion is made of polytetrafluoroethylene, the frictional force generated between the support shaft 14 and the sleeve 15 can be reduced, so that the sleeve can be easily rotated along with the progress of the warp. Therefore, even if the warp is advanced while being in contact with the sleeve 15, damage to the warp due to friction can be further reduced.

  The length in the width direction of the sleeve 15 is preferably about the same as the yarn width of the warp. If the length in the width direction of the sleeve 15 is shorter than the width of the warp, the warp such as the spread yarn comes into contact with the heald body 13 and the warp is damaged. Moreover, when the length of the sleeve 15 in the width direction is longer than the width of the warp, adjacent warps are separated, making it impossible to manufacture a high-quality fabric.

Moreover, it is preferable that the diameter of the sleeve 15 is 7.5 mm or more and 9.5 mm or less. If it is less than 7.5 mm, the area where the warp and the sleeve 15 come into contact with each other is reduced, and the frictional force between the warp and the sleeve is increased. The diameter of the conventional support shaft 14 is 9.2 mm, and the contact area between the support shaft 14 and the warp is about 25.2 mm ² . It is preferable that the area where the warp and the sleeve 15 are in contact with each other is larger than 22.7 mm ² which is 90% of this area. The sleeve 15 at this time has a diameter of about 7.5 mm. Therefore, the diameter of the sleeve 15 is preferably 7.5 mm or more. If it is larger than 9.5 mm, the sleeve 15 is difficult to rotate. Further, the thickness of the collar frame to which the heald 11 is attached is 10 mm, and the diameter of the sleeve 15 cannot exceed 10 mm.

  FIG. 4 is an end view for explaining an example of the manufacturing method of the sleeve 15. FIG. 4A is an end view before the sleeve 15 is manufactured, and FIG. 4B is an end view of the manufactured sleeve 15.

  The sleeve 15 is manufactured as follows. First, as shown in FIG. 4 (a), two pieces of Teflon (registered trademark) tape 21, which is a tape in which an adhesive is applied to a film made of polytetrafluoroethylene, are arranged in the length direction so that the adhesives face each other. And paste them together. The bonded Teflon (registered trademark) tape 21 is wound around the support shaft 14 to form an annular shape, and the sleeve 15 is manufactured. Examples of the Teflon (registered trademark) tape 21 include nitoflon adhesive tape (No. 903UL, manufactured by Nitto Denko Corporation). Accordingly, as shown in FIG. 4B, a sleeve 15 is formed in which both the outer peripheral surface portion and the inner peripheral surface portion are made of tetrafluoroethylene.

  FIG. 5 is a schematic view of the configuration of the fabric manufacturing apparatus 31 including the heald 11 as viewed from the side. The fabric production apparatus 31 is a loom, and a plurality of warp yarns 32 are set and are interlaced with the weft yarns 33 to produce a fabric. The direction of weaving is from the left to the right in the figure. The weft 33 divides the warp 32 and the weft 33 sequentially by passing the weft 33 sequentially through the shed while forming the shed by dividing the warp 32 up and down by the vertical movement of the heald 11 as the heel means. As the warp yarn 32 and the weft yarn 33, for example, a spread yarn in a state where 12,000 carbon fibers are bundled and opened so that the yarn width is about 20 mm is used. The carbon fibers are finely attached with a sizing agent or the like.

  In the woven fabric production apparatus 1, weaving is carried out while reciprocating between the position indicated by the solid line away from the heald 11 and the position of the weft 33 indicated by the broken line with respect to the direction of weaving. The warp yarn 32 opened and closed by the heald 11 is guided from above and below by a pair of warp side guide rollers 37 on the rear side in the weaving direction. In front of the weaving direction, the sheet is sandwiched between a pair of upper and lower weaving side gripping rollers 38 attached to the weaving front 36. A weaving side gripping roller 38, which is a weaving side gripping means for holding the rear end of the woven fabric, sandwiches the position indicated by the broken line for inserting the weft 33 into the shed and the front side of the weaving from the position of the shed. It moves along with the reciprocating movement of the front of the weaving 36 between the separation positions indicated by the solid lines away from each other.

  Since the warp 32 and the woven fabric are suddenly pulled when the pre-weaving 36 is moved, the warp dancer roll 39 and the fabric dancer roll 40 are moved forward of the warp side guide roller 37 and the fabric side gripping roller 38. They are provided at the rear. A winding device 41 is provided behind the fabric dancer roll 40, and the fabric 43 woven on the winding roll 42 is sequentially wound. The winding roll 42 is rotationally driven by a motor 44. A release paper roll 45 is disposed above the winding roll 42, and the interleaf paper 46 is supplied to the winding roll 42 and is sandwiched between layers of the fabric 43 to be wound.

  The warp dancer roll 39 moves up and down according to a cam follower 49 that follows the cam surface of the outer cam 48 with both rod cylinders 47 interposed therebetween. The textile dancer roll 40 sinks downward while receiving tension adjustment by the cylinder 50. The sinking position is detected by the upper and lower limit switches 51 and 52, respectively. When the lower limit switch 52 is depressed, the motor 44 of the winding device 43 is driven, and the fabric 43 is wound on the winding roll 42. When the fabric 43 is wound, the fabric dancer roll 40 is raised, and when the upper limit switch 51 is raised, the driving of the motor 44 is stopped. A nip roll 53 is also provided in front of the warp dancer roll 39 with respect to the weaving direction, and the warp dancer roll 39 absorbs or replenishes the slack of the warp 32 with respect to the shed side. The influence is prevented from affecting the stand for supplying the warp 32. The nip roll 53 opens when the cam follower 56 that follows the cam surface of the outer cam 55 is pushed up via the both rod cylinders 54 and closes when the cam follower 56 is away from the cam surface as shown in the figure.

  FIG. 6 is a diagram illustrating a basic weaving process in the fabric manufacturing apparatus 1. FIG. 6A shows a state in which the warp 32 is opened to form a shed and the weft 33 is inserted. The weaving front side gripping roller 38 grips the rear end of the fabric 43 at a separation position C ahead of the weft 33 insertion position in the weaving direction. FIG. 6B shows a state in which the weaving front side gripping roller 38 is retracted to the front end position B of the weft 33. Since the front weaving side holding roller 38 moves while holding the rear end of the fabric 43, the fabric 43 is strongly pulled backward. At this time, the fabric 43 is supplied from the fabric dancer roll 40. FIG. 6C shows a state in which the weaving front side gripping roller 38 is further retracted while rotating, and is thus retracted to the rear end position A of the weft 33. In this way, the weft 33 can be joined to the rear end of the fabric 43 instead of beating. Further, when the front weaving side holding roller 38 moves forward to the separation position C with the rear end of the fabric 43 interposed therebetween, the weft 33 as shown in FIG. 6A can be inserted. The weft 33 is inserted into the shed by a rapier device having a weft chuck at the tip, as will be described later.

  That is, in FIG. 6A, a step of passing the weft 33 through the shed is performed while the front-side gripping roller 38 holds the rear end of the fabric 43 with the separation position C therebetween. In FIG. 6 (b), a process of returning the front weaving side holding roller 38 holding the rear end of the fabric 43 from the separation position C to the front end position B of the weft 33 inserted in the shed is performed on the heald 11 side. In FIG. 6 (c), the weaving side gripping roller 38 is rotated backward by the width of the weft 33 to the rear end position A of the weft 33 inserted into the shed, and rotated from B to A. A step of feeding the fabric 43 to the front side of the weaving side gripping roller 38 in the traveling direction and gripping the intersecting portion with the warp yarn 32 through which the weft 33 is passed as the rear end of the fabric 43 is performed. Furthermore, a process of advancing the weaving front side holding roller 38 holding the rear end of the fabric 43 from the position of the shed to the separation position C away from the heald 11 is performed, and the wefts 33 are sequentially performed by repeating these processes. Fabric 43 is manufactured for each yarn width.

  As described above, after passing the weft 33 through the shed, the front weaving side holding roller 38 that holds the rear end of the woven fabric is returned to the heald 11 side to the position of the shed, so that it is easy to lose the shape without beating the weft 33. Even if wefts are used, a flat woven fabric can be produced. Furthermore, since the heald 11 is used, even if warp yarns that are easily damaged by friction are used, the warp yarns do not fluff, and a high-quality fabric can be manufactured. Therefore, this fabric manufacturing apparatus has high weaving properties.

  Next, as an example of the present embodiment, the warp opening movement is performed using the heald 11 and, as a comparative example, the warp opening is performed using the same heald as the heald 11 except that the sleeve 15 is not provided. The case where exercise is performed will be described.

  Para-aramid fibers (Twaron TW2000, manufactured by Teijin Techno Products, yarn width 8 mm, fineness 3360 dtex, number of filaments 2000) were used as the warp and weft. This para-aramid fiber is a fiber composed of polyparaphenylene terephthalamide produced by synthesizing a polymer by condensation polymerization of p-phenylenediamine and terephthaloyl chloride and then wet-spinning the polymer. As the Teflon (registered trademark) tape 21 constituting the sleeve 15, a nitoflon adhesive tape (No. 903 UL, manufactured by Nitto Denko Corporation) was used. As the fabric manufacturing apparatus 31, the fabric manufacturing apparatus (SW-TH100, manufactured by Sakai Obex Co., Ltd.) shown in FIG. 5 was used. Weaving was performed so that the feed rate of the warp when the pre-weaving 36 moved was about 5 m / min.

  FIG. 7 is a diagram illustrating the results of an example in which warp opening movement is performed. In the heald 11 as an example, the sleeve 15 was in contact with the warp and was rotated by the progress of the warp. Therefore, as shown in FIG. 7, even if the warp is advanced while being in contact with the sleeve 15, fluff does not occur and the warp is not damaged.

  FIG. 8 is a photograph showing a comparative example in which the warp opening movement is performed. As shown in FIG. 8, when the heald as a comparative example is advanced while contacting the warp with the support shaft 14, the warp is damaged by the friction between the heald and the warp and fluffing occurs.

It is a perspective view which shows the heald 11 which is one Embodiment of this invention. FIG. It is sectional drawing of the heald 11 seen from the cut surface line III-III of FIG. FIG. 10 is an end view for explaining an example of a method for manufacturing the sleeve 15. It is the schematic which looked at the structure of the textile manufacturing apparatus 31 provided with the hold 11 from the side surface direction. It is a figure which shows the basic weaving process in the textile manufacturing apparatus 1. FIG. It is a figure which shows the result of the Example which is carrying out the opening movement of a warp. It is a figure which shows the result of the comparative example which is carrying out the opening movement of a warp.

Explanation of symbols

11 Held 12 Mail 13 Held body 14 Support shaft 15 Sleeve 31 Textile manufacturing equipment

Claims (3)

A warp insertion hole for inserting the warp is formed,
A cylindrical support shaft provided across the warp insertion hole;
A cylindrical sleeve circumscribing the support shaft;
The heald according to claim 1, wherein the sleeve is rotated by advancing the contact warp.   The heald according to claim 1, wherein at least one of the outer peripheral surface portion and the inner peripheral surface portion of the sleeve is made of polytetrafluoroethylene. A fabric manufacturing apparatus that crosses a warp and a weft through a weft sequentially through a weft while forming a shed by dividing a plurality of warps vertically by an opening movement by a heel means,
The textile manufacturing apparatus according to claim 1 or 2, wherein the wrinkle means is a heald according to claim 1 or 2.