EP0845552A2 - Ruban d'insertion et tissu pour métiers à griffes - Google Patents

Ruban d'insertion et tissu pour métiers à griffes Download PDF

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Publication number
EP0845552A2
EP0845552A2 EP97119289A EP97119289A EP0845552A2 EP 0845552 A2 EP0845552 A2 EP 0845552A2 EP 97119289 A EP97119289 A EP 97119289A EP 97119289 A EP97119289 A EP 97119289A EP 0845552 A2 EP0845552 A2 EP 0845552A2
Authority
EP
European Patent Office
Prior art keywords
fabric
carrier tape
yarn
fabric band
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97119289A
Other languages
German (de)
English (en)
Other versions
EP0845552A3 (fr
Inventor
Masahiko Kimbara
Makoto Tsuzuki
Masahiko Yasue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyoda Jidoshokki Seisakusho KK
Toyoda Automatic Loom Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP8292868A external-priority patent/JPH10130994A/ja
Priority claimed from JP29286996A external-priority patent/JP3520696B2/ja
Application filed by Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyoda Jidoshokki Seisakusho KK
Publication of EP0845552A2 publication Critical patent/EP0845552A2/fr
Publication of EP0845552A3 publication Critical patent/EP0845552A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/50—Miscellaneous devices or arrangements concerning insertion of weft and not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/04—Auxiliary apparatus combined with or associated with looms for treating weft

Definitions

  • the present invention relates to a carrier tape for a rapier loom and a fabric suitable for a reinforcing material for a fabric reinforced composite carrier tape.
  • One known weft insertion device for a rapier loom is equipped with a carrier tape, which has a rapier head secured to its distal end, and a rapier wheel on which the carrier tape is wound.
  • the carrier tape reciprocates in accordance with the rotation.
  • the rapier head enters the shed in accordance with the forward movement of the carrier tape and moves out of the shed in accordance with the backward movement of the carrier tape. Then, the weft is inserted in the shed.
  • a weft insertion device disclosed in Japanese Patent Publication No. Sho 60-40538 has a rapier head 52 secured to the distal end of a carrier tape 51 as shown in Figure 21.
  • the carrier tape 51 has its proximal end secured to the outer surface of the rapier wheel 53 and is wound around the rapier wheel 53.
  • Two rollers 54 and 55 are provided above the rapier wheel 53 to prevent the carrier tape 51 from being lifted from the outer surface of the rapier wheel by the centrifugal force generated by the rotation of the rapier wheel 53.
  • a rope 56 is wound around the rapier wheel 53 and both rollers 54 and 55 to press the carrier tape 51 against the winding surface of the rapier wheel 53.
  • the reciprocal rotation of the rapier wheel 53 permits insertion of the weft into the shed.
  • a device disclosed in Japanese Unexamined Patent Publication No. Hei 3-180542 uses a drive sprocket as the rapier wheel 53 as shown in Figure 22.
  • the carrier tape 51 has engagement holes 51a, which are to engage with the teeth 53a of the drive sprocket and are formed with a predetermined pitch in the lengthwise direction of the carrier tape 51.
  • the reciprocal rotation of the rapier wheel 53 is transmitted to the carrier tape 51 based on the engagement of the teeth 53a with the associated engagement holes 51a, causing the carrier tape 51 to reciprocate in accordance with the reciprocal rotation of the rapier wheel 53.
  • a polyester carrier tape is one example of a plastic carrier tape.
  • one FRP carrier tape has two plain fabrics W1, which are provided on the top and bottom faces of the carrier tape 51, and a stack of fabric layers W2 and W3 between the plain fabrics W1.
  • Each fabric layer W2 has fibers aligned in the longitudinal direction of the carrier tape 51.
  • Each fabric layer W3 has fibers extending in a direction obliquely intersecting the longitudinal axis of the carrier tape 51. The engagement holes are punched out by press working.
  • a carrier tape disclosed in Japanese Unexamined Utility Model Publication No. Hei 2-125979 has a laminar structure including a number of foundation cloths.
  • the carrier tape has a reinforcing material provided in at least a layer of the laminar structure extending in the longitudinal direction, outside the sprocket engagement holes, which are arranged in the longitudinal direction.
  • guide members 57a and 57b which enter the shed from the lower side of the warp Y at the time the shed is opened to guide the carrier tape 51, are needed, as shown in Figure 24.
  • the guide members 57a and 57b are alternately arranged in the lengthwise direction of an unillustrated slay where reeds are supported. Because the guide members 57a and 57b move in and out of the shed due to the rocking of the slay, the warp Y may be hooked on the guide members 57a and 57b and may be cut. Another shortcoming is that the warp Y may be fuzzed by friction due to contact with the guide members 57a and 57b.
  • the FRP carrier tape 51 which includes a stack of fabric layers, is very rigid, the rapier head is held stable, and is thus smoothly thrust into and out of the shed. This ensures smooth handing of the weft.
  • the rung-like portion between the engagement holes 51a is subject to complex deformation, so that interlayer shear fracture is liable to occur there as well. Furthermore, as shown in Figure 22, surface peeling may occur due to the engagement between the teeth 53a of the rapier wheel 53 and the edges of the engagement holes 51a during disengagement.
  • the carrier tape according to this invention is formed of fiber reinforced plastic.
  • a fabric band which is substantially the same size as the carrier tape, is used as a reinforcing material for reinforcing the tape.
  • the fabric band includes a yarn arranged obliquely to a longitudinal direction of the fabric. The yarn is woven to be folded at the sides of the fabric.
  • the "yarn” includes a bundle of fibers with filaments aligned without being twisted, as well as a twisted yarn.
  • the fabric band of the carrier tape according to the present invention is an interconnected fabric. Furthermore, most of the yarn constituting the fabric is of a first yarn having a large modulus of elasticity. At least one second yarn is arranged along substantially the entire length of the fabric band and has a larger elongation at its breaking point than the first yarn.
  • the fabric according to the present invention includes a fabric band having substantially the same width and thickness as the carrier tape.
  • the fabric includes a yarn arranged obliquely to a longitudinal direction of the fabric.
  • the yarn is woven to be folded at the sides of the fabric.
  • the yarn constituting the fabric is an interconnected integral fiber.
  • Most of the yarn constituting the fabric band is a first yarn with a large modulus of elasticity.
  • At least one second yarn is arranged along substantially the entire length of the fabric band and has a larger elongation at its breaking point than the first yarn.
  • Figure 1 is a schematic perspective view of a reinforcement fabric band 1, which is used for a fiber reinforced plastic carrier tape for a rapier loom.
  • the fabric band 1 is comprised of a three-dimensional braid, which is formed with substantially the same width and thickness of the carrier tape.
  • the thickness of the fabric band 1 is chosen to effect a rigidity such that, when the fabric band 1 is used for an FRP carrier tape, the carrier tape is movable in a shed while being extended at the time of weft insertion without the need for guide members.
  • the thickness of the fabric band 1 is about 1 to 3 mm.
  • the fabric band 1 has a substantially rectangular cross section and has multiple yarns 2 folded back, or angled inward, on the surface of the fabric 1 and arranged to extend at an angle (alignment angle) to the longitudinal axis of the fabric band 1. Therefore, the yarns 2 constituting the fabric 1 are folded, or angled, at both sides of the fabric 1, so that cut ends are not exposed at the side edge.
  • the "alignment angle” is the angle formed between the layout direction of the yarns 2 and the longitudinal axis of the fabric base 1.
  • the value of the alignment angle is preferably set within the range of ⁇ 1° to ⁇ 60°, and is normally set to ⁇ 3° to ⁇ 15°.
  • An untwisted yarn comprised of fibers with a high breaking strength and a large modulus of elasticity, such as carbon fibers or ceramic fibers, is preferably used as the yarn 2.
  • the fabric band 1 is woven with a braider for three-dimensional braid as disclosed in, for example, Japanese Unexamined Patent Publication No. Hei 2-259148 or Japanese Unexamined Patent Publication No. Hei 2-307949.
  • the braider for three-dimensional braid has carrier drive units 3 arranged in multiple rows and multiple columns along the carrier plane, which is perpendicular to the longitudinal axis of the band of fabric 1.
  • Each carrier drive unit 3 causes a yarn carrier 4 (shown in Figure 3), which supports an unillustrated bobbin, to run along a predetermined path.
  • the fabric is woven with the yarns 2 fed from those bobbins.
  • the carrier drive units 3 are equipped with rotors 6, which are driven by independent actuators 5.
  • Each rotor 6 has recesses 7 formed at four locations in its outer surface for holding the associated yarn carrier 4 with an adjoining rotor 6.
  • the recesses 7 are defined by arcs, the centers of which coincide with the axes of the rotary shafts of the rotors 6, so that when one of the rotors 6 rotates, the corresponding recess 7 of the adjoining rotor 6 serves as a guide for the yarn carrier 4.
  • a fixed guide 8 frames the carrier drive units 3, which are arranged in multiple rows and multiple columns, as shown in Figure 2.
  • the fixed guide 8 has recesses 8a that engage with the yarn carriers 4.
  • each yarn carrier 4 includes a convex lens-shaped held portion 9 having a pair of arc surfaces 9a (only one shown) corresponding to the recesses 7 of the rotor 6, flanges 10 formed at both ends of the held portion 9, and a bobbin support rod 11.
  • the held portion 9 of the yarn carrier 4 is held between the adjoining rotors 6 or between the rotor 6 and the fixed guide 8.
  • the yarn carriers 4 are arranged in accordance with the cross-sectional shape of the fabric 1 in a moving area.
  • the rotors 6 are separated into two groups. Each of the groups includes alternate rotors along the rows and columns so that adjacent rotors of a row or column are in different groups. The rotors 6 of each group are driven together. In Figure 4, the two groups of rotors are distinguished from each other by the presence or absence of cross hatching.
  • the hatched rotors 6 in Figure 4 will be called the first group of rotors
  • the unhatched rotors 6 will be called the second group of rotors.
  • the first group of rotors intermittently rotate 90 degrees or 180 degrees clockwise
  • the second group of rotors intermittently rotate 90 degrees or 180 degrees counterclockwise.
  • the yarn carriers 4 move in their layout range in a relatively simple and regular manner during weaving of the fabric 1.
  • the loci of the yarn in the individual yarn carriers 4 is as shown in Figures 5(a) - 5(C), respectively.
  • the yarns 2 that are fed out from the bobbins supported on the yarn carriers 4 move while forming a closed loop along curves shown in Figures 5(a) to 5(c).
  • the fabric band 1 As both groups of rotors are rotated 90 degrees or 180 degrees sequentially in the opposite directions, therefore, the fabric band 1, with the yarns 2 folded inward on each surface, is woven. In other words, the yarns are folded to define the different surfaces of the band and are not cut, as shown in Fig 1.
  • Beating-up can be done during the weaving of the fabric 1 as needed, and the alignment angle of the yarns 2 of the fabric 1 can be controlled by adjusting the degree of reeding and the take-up speed of the woven fabric.
  • the fabric 1 is impregnated with resin and is then hardened.
  • the resin impregnation and curing are carried out by a resin transfer molding method, for example.
  • the fabric 1 is placed in a mold, and a thermosetting matrix resin is injected into this mold to impregnate the fabric band 1.
  • the resin is then thermoset to produce an FRP carrier tape.
  • the resin used may be an epoxy resin.
  • holes that engage with the teeth of the sprocket are formed in the carrier tape.
  • the holes are formed by press working or drilling after the FRP carrier tape is manufactured.
  • the mold for resin impregnation may be provided with projections so that the holes can be formed at the time of resin impregnation.
  • the fabric 1 is formed in a band shape, the thickness of which effects a rigidity that allows the resulting FRP carrier tape to be movable in a stable manner at the time of weft insertion. It is therefore possible to move the carrier tape in and out of the shed in accordance with the rotation of the rapier wheel while keeping the rapier head stable, without guide members. This prevents wear of the carrier tape by friction between guide members and the carrier tape, thus increasing the life of the carrier tape.
  • the fabric 1 is woven in such a way that the yarns 2 are folded, or angled, at sides of the fabric 1, there are no cut fiber surfaces present at either side of the carrier tape. Even when bending stress is frequently applied to the carrier tape, therefore, the carrier tape resists breakage along its side surfaces. The resulting carrier tape is therefore more durable as compared with the conventional FRP carrier tape, which is reinforced with laminated fibers.
  • the fabric band 1 consists of a three-dimensional braid, when it is used for a carrier tape, there are no interfaced between layers. Or, in other words, there is only one integral layer. Even when bending stress is repeatedly applied to the carrier tape, therefore, interlayer separation does not occur, unlike in the conventional type, which uses a reinforcing material having laminated flat fabrics. Therefore, a carrier tape made with the three-dimensional braid of Fig. 1 is more durable.
  • interlayer separation may occur due to the friction between the teeth and the holes when the teeth disengage from the holes. Since the fabric 1 of Fig. 1 has no layer interfaces, interlayer separation does not occur. Additionally, there are yarns extending thicknesswise (from top to bottom), obliquely intersecting the longitudinal axis of the carrier tape. Therefore, surface peeling of the fabric band is impeded from spreading to a point at which the separation reaches the warp, which would adversely affect the quality of the fabric in the loom and the working efficiency of the loom.
  • the fabric 1 consists of a three-dimensional braid, if a mold for the impregnation and curing of a resin is provided with projections to form sprocket engagement holes, the projections easily penetrate between the yarns 2 of the fabric band 1. Since a carrier tape with holes formed in this manner, unlike one having holes formed by press working or drilling after resin molding, does not have cut fiber surfaces around the holes, surface peeling by the friction between the teeth of the sprocket and the holes is prevented, and interlayer shearing from around each hole is prevented.
  • This embodiment differs from the first one in that a square braider is used as the three-dimensional braider for weaving a three-dimensional braid. While the structure of the fabric band 1 of this embodiment differs from that of the three-dimensional braid of the first embodiment in the strict sense, they are the same in that the yarns 2 are folded, inward, or angled on the surface of the fabric 1 and are arranged at a predetermined alignment angle with respect to the longitudinal axis of the band of fabric 1.
  • An FRP carrier tape produced by using this fabric 1 as a reinforcing material has advantages similar to that of the first embodiment.
  • the structure of the square braider will be discussed below.
  • the square braider has a frame 14 having a guide groove 13 for guiding yarn carriers 12 in movement, as shown in Figure 6(b).
  • horn gears 15, which are similar to the rotors 6, are formed like disks, each having four recesses 15a formed at equal angular intervals in its outer surface for engaging and driving the yarn carriers 12.
  • the horn gears 15 are designed to be synchronously rotated via unillustrated gears.
  • Each yarn carrier 12 has a cylindrical held portion 12a, which is engaged by the recesses 15a of the associated horn gear 15, and an engage portion 12b (marked black in Figures 6(a) to 6(d)), which is engageable with the guide groove 13.
  • the yarn carriers 12 are moved along the guide groove 13 by the rotation of the horn gears 15.
  • adjacent horn gears 15, with respect to rows and columns, are rotated in the opposite directions, as in the previous embodiment. Unlike in the previous embodiment, however, the horn gears 15 are rotated continuously, not intermittently.
  • the number of the yarn carriers 12 used in weaving a fabric is equal to the number of the horn gears 15, which is considerably less than the number of the yarn carriers 4 per rotor 6 of the first embodiment.
  • the yarn carriers 12 are arranged in association with the horn gears 15 as shown in Figure 6(c), and weaving is initiated from this state.
  • the individual horn gears 15 are driven in predetermined directions, the moving loci of the individual yarn carriers 12 are indicated by the solid line, broken line, one-dot chain line and two-dot chain line in Figure 6(d), and the yarns 2, which are released from bobbins supported on the yarn carriers 12, move to form closed loops along the associated curves in Figure 6(d).
  • the fabric 1 is woven with the yarns 2 arranged to be folded inward, or angled, at each surface.
  • the fabric 1 comprises a three-dimensional fabric having a plurality of laminated fiber layers with yarns penetrating each fiber layer.
  • the fabric 1 comprises an appropriate number of the following: warp layers 17, each consisting of a warp Y; weft layers 18, each consisting of a weft X; bias yarn layers 19, each consisting of a bias yarn B1; and bias yarn layers 20, each consisting of a bias yarn B2.
  • the individual yarn layers 17 to 20 are connected by connection yarns Z, which ore arranged to penetrate all the respective yarn layers.
  • the connection yarns Z pass from top to bottom and are folded to make 180 degree turns at the wide surfaces, or the top and bottom, of the fabric band 1.
  • the warps Y are arranged along the longitudinal axis of the fabric 1, and the wefts X are arranged in a folded manner (180 degree turns) in the widthwise, or side to side, direction of the band of fabric 1 to be perpendicular to the warps Y.
  • the bias yarns B1 are arranged in a folded manner in a transverse direction of the band of fabric 1 to have a predetermined angle to the longitudinal axis of the band of fabric 1, and the bias yarns B2 are arranged to intersect the longitudinal axis of the fabric 1 at an inclination angle that is opposite to that of the bias yarns B1.
  • the connection yarns Z are locked by lock yarns P1.
  • This fabric 1 can be manufactured by a method disclosed in, for example, Japanese Unexamined Patent Publication No. Hei 5-272030. Specifically, after a predetermined number of the individual yarn layers are laminated, the connection yarns Z are inserted to penetrate all the individual yarn layers 17-20 and are then locked by the lock yarns P1.
  • This fabric 1 like the fabric band 1 of the previous embodiment, is formed into an FRP carrier tape after undergoing resin impregnation and curing. If holes are necessary, they can be formed by press working or drilling as in the first embodiment.
  • This carrier tape like that of the first embodiment, can be thrust into and out of the shed in accordance with the rotation of the rapier wheel. Further, the durability of the carrier tape is greater than that of the conventional FRP carrier tape, which uses laminated fibers as a reinforcing material.
  • this fabric band 1 has planar yarn layers (fiber layers), which are parallel to the plane of the band of fabric band 1. Since the individual yarn layers 17-20 are sewn together by the connection yarns Z, which are arranged to penetrate the individual yarn layers 17-20, however, even when bending stress is frequently applied to the carrier tape, causing localized interlayer shear fracture or surface peeling, such interlayer shear fracture or surface peeling is significantly impeded and progresses little. Therefore, the durability of the carrier tape is improved as compared with that of the conventional carrier tape, which has fiber layers simply laminated in the thicknesswise direction and has no yarns penetrating the stacked fiber layers.
  • the fabric 1 consists of a flat braid.
  • the fabric 1 has multiple yarns 2 arranged to be folded back, or, angled, on the surface of the fabric 1 and to have a predetermined alignment angle to the longitudinal axis of the fabric 1.
  • the flat braid has only two yarns 2 arranged in the thicknesswise direction (perpendicular to the plane of Fig. 2) of the fabric 1, it is not possible to increase the number of yarns arranged in the thicknesswise direction of the fabric 1 to achieve the desired rigidity.
  • varying the thickness of the individual yarns 2 can vary the rigidity. Therefore, the desired rigidity can be achieved.
  • This fabric 1 is formed into an FRP carrier tape after undergoing resin impregnation and curing, as in the embodiments discussed above.
  • this embodiment is the same as the first and second embodiments in that the fabric 1 consists of a braid, with the difference being that the braid of Fig. 8 has a two-dimensional structure, this embodiment has substantially the same advantages as the first and second embodiments.
  • a three-dimensional braid has a better resistance to bending stress, since it can use many thin yarns that are interlaced.
  • This fabric 1 is woven by a braider having a structure as shown in Figures 9(a) to 9(c).
  • the braider is equipped with a frame 23 having a guide groove 23a for guiding bobbin carriers 22 and two types of horn gears 24 and 25, which drive the bobbin carriers 22.
  • Six small-diameter horn gears 25 are arranged adjacent to one another along an arc, each having four recesses 25a formed at equal angular intervals.
  • the recesses 25a are engageable with the bobbin carriers 22.
  • the recesses 24a are likewise engageable with the bobbin carriers 22.
  • the two horn gears 24 are arranged at such positions as to transfer the bobbin carriers 22 between two legs of a circuit formed by the horn gears 25.
  • the horn gears 24 and 25 are respectively rotatable by independent actuators (not shown).
  • Each bobbin carrier 22 is designed to engage with the recesses 24a and 25a of the horn gears 24 and 25 and with the guide groove 23a, and each carrier 22 is movable along the guide groove 23a by the rotation of the horn gears 24 and 25.
  • the adjacent horn gears 24 and 25 of this braider are continuously rotated in opposite directions at the same peripheral velocity.
  • the bobbin carriers 22 are put in a specific arrangement with respect to the horn gears 24 and 25, as shown in Figure 9(c), and weaving is initiated in this state.
  • the individual horn gears 24 and 25 are driven in predetermined directions, as indicated by the arrows in Figure 9(c)
  • the moving loci of the yarns in the individual bobbin carriers 22 are shown in Figure 9(d), that is, the yarns 2 fed from the bobbins supported on the bobbin carriers 22 move along the curve shown in Figure 9(d), which represents a path of intersection between the carrier plane and the yarn.
  • the fabric 1 illustrated in Fig. 8 is woven. That is, a band of fabric 1 having the yarns 2 arranged to be folded back, or turned inward, at the sides is woven.
  • a fabric 1 as shown in Figure 10, is woven.
  • the band of fabric 1 of Fig. 10 differs from that of Fig. 8 in that the band of Fig. 10 includes core yarns 27 running parallel in the longitudinal direction of the fabric 1. Therefore, a carrier tape using the band fabric 1 of Fig 10 as a reinforcing material has a greater resistance against bending stress and elongation as compared with a carrier tape using the band of fabric 1 of Fig. 8 as a reinforcing material.
  • the band of fabric 1 consists of a plain fabric band or a single-layer fabric band.
  • the fabric band 1 is woven with warps Y arranged in the longitudinal direction of the fabric 1 and wefts X inserted in the widthwise direction, crossing the warps Y perpendicularly.
  • the individual yarns forming the flat fabric 1 should have a diameter that is approximately equal to the total thickness of a fabric band made of a plurality of layers.
  • the fabric band of Fig. 11 is a single-layer fabric, an FRP carrier tape employing a band of this fabric as a reinforcing material does not suffer interlayer separation. Since the wefts X are folded inward at both sides of the band of fabric 1 (see Fig. 11), there are no cut fiber surfaces present at either side surface of the carrier tape. Even when bending stress is frequently applied to the carrier tape, therefore, the carrier tape resists splitting at its side surfaces.
  • the band of fabric 1 is formed of a single-layer cloth, the band may be woven by a tape loom.
  • the fabric is woven with the warps Y arranged along the longitudinal direction of the fabric band 1 and the wefts X inserted in a folded manner in the widthwise, or transverse, direction, perpendicularly crossing the warps Y.
  • the individual yarns of the warps Y and wefts X should be thick.
  • a twill instead of a plain fabric may be used as the single-layer fabric of the band.
  • yarns of the same thickness as that of a plain fabric can produce a fabric that is thicker than the plain fabric. It is therefore possible to weave a fabric suitable for a carrier tape having a given rigidity with yarns that are thinner than the yarns of a plain fabric having the same rigidity.
  • the fabric of the band of this embodiment differs from those of the above-described embodiments in that most of the yarns constituting the fabric are first yarns, which have a large modulus of elasticity, and second yarns, which have a larger elongation at their breaking point than the first yarns, are arranged along substantially the entire length of the fabric. While this fabric band 1, like the fabric band 1 of the first embodiment, is formed of a three-dimensional braid, the fabric of Fig. 13 differs in that a plurality of core yarns, which are not part of the three-dimensional braid, are arranged along substantially the entire length of the fabric band 1.
  • the core yarns, or second yarns are formed of fibers having a greater elongation at their breaking point than the first yarns.
  • like or same reference numerals are given to those components that are the same as the corresponding components of the first embodiment.
  • FIG 13 is a schematic perspective view showing a part of a carrier tape 29.
  • the carrier tape 29 is formed of FRP in which the band of fabric 1, which has substantially the same width and thickness as the carrier tape 29, has been subjected to resin impregnation and curing and has holes 31 formed along its center line at a predetermined pitch.
  • the holes 31 are formed in a diamond shape to engage with the teeth of the carrier tape drive sprocket (not shown).
  • the fabric band 1 of Fig. 13, like that of the first embodiment, is comprised of a rectangular three-dimensional braid.
  • the fabric band 1 includes yarns 2 folded back, or inward, on the surface of the fabric 1 and to have a predetermined alignment angle with respect to the longitudinal axis of the fabric band 1.
  • core yarns 32a, or second yarns, which are not involved in the weave of the three-dimensional braid, run longitudinally in the band of fabric 1.
  • the alignment angle of the first yarns 2 is set to ⁇ 45 degrees.
  • Untwisted yarns comprised of fibers, such as carbon fibers or ceramic fibers are used as the first yarns 2, which have a large modulus of elasticity. Therefore, the first yarns having a large modulus of elasticity are used for most of the yarns that constitute the fabric 1.
  • At least two core yarns 32a serve as the second yarns.
  • the second yarns 32a are arranged at a predetermined transverse spacing, so that the carrier tape 29 resists twisting when the first yarns 2 of the carrier tape 29 are all broken.
  • two core yarns 32a are arranged on either side of the row of holes 31.
  • polyaramide fibers or high-strength polyethylene (ultra high molecular weight polyethylene) fibers can be used for the second yarns, or core yarns 32a.
  • Kevlar trade name, available from Du Pont is preferable.
  • the fabric 1 is woven with the braider for three-dimensional braid according to the first embodiment(Fig. 2).
  • Each rotor 6 in use has a hole 6a formed in the center, as shown in Figure 14.
  • the core yarns 32a are led out of the holes 6a of the rotors 6 corresponding to their arranged positions, and the fabric band 1 of Fig. 13, with the core yarns 32a arranged at predetermined positions, is woven.
  • the carrier tape 29 of this embodiment (Fig. 13) has the following advantages in addition to the advantages of the carrier tape of the first embodiment.
  • An FRP carrier tape that uses, as a reinforcing material, a fabric formed to avoid interlayer separation in a direction perpendicular to the plane of the band may, after a long period of use, be fractured along a plane perpendicular to the longitudinal axis of the tape, if the yarns of the fabric are all formed of the same large modulus of elasticity material. Accordingly, loom beating-up may occur when a part of the carrier tape and the rapier head remain in the weaving section of the loom, after breaking off.
  • the core yarns 32a which have a larger elongation at their breaking point than the yarns 2 that mostly constitute the fabric 1, are arranged along substantially the entire length of the fabric 1, even if the yarns 2 are all broken, the carrier tape 29 is still in one piece due to the core yarns 32a. Therefore, the rapier head and a length of the carrier tape would not be left in the shed during beating-up, thus preventing the rapier loom from being damaged during the beating-up step.
  • the carrier tape 29 Since at least two core yarns 32a are arranged at a predetermined spacing in the widthwise, or transverse, direction of the carrier tape 29, the carrier tape 29 resists being twisted at locations where the yarns 2 are broken. This prevents the loom warps from being cut by the broken tape when the carrier tape is moved out of the warp opening (shed).
  • the reinforcing fabric 1 can be used for the carrier tape 29, regardless of whether or not the holes 31 are formed in the carrier tape 29.
  • the second yarns which have a large elongation at their breaking point, are employed, as the core yarns 32a in the fabric 1 at a number of transverse locations extending parallel to the longitudinal axis of the fabric 1, the characteristics of the second yarns have little or no influence on the flexural elasticity of the carrier tape 29. Even when the second yarns have a smaller flexural rigidity than the first yarns, for example, the flexural rigidity of the carrier tape 29 is not significantly reduced.
  • the seventh embodiment will now be discussed with reference to Figure 15.
  • This embodiment differs from the sixth embodiment in that the second yarns arranged in the fabric three-dimensional braided fabric band 1 are interlaced yarns 32b that are interlaced with a part of the first yarns 2, not as core yarns 32a.
  • the interlaced yarns 32b, or second yarns are woven with the first yarns 2 as to be folded back, or angled inward, near the surface of the fabric band 1.
  • the interlaced yarns 32b are interlaced in both the top and bottom surfaces, or the wide surfaces.
  • a braider for three-dimensional braid is used, as in the sixth embodiment.
  • the three-dimensional braid is woven with the braider for three-dimensional braid by separately driving two groups of multiple rotors 6 as described earlier.
  • the reversing positions of the yarn carriers 4 can be altered so that weaving can be carried out with the reversing positions of specific yarns set different from those of the other yarns. Therefore, the fabric band 1 is woven (interlaced) with the yarns 2 in such a manner that the interlaced yarns 32b are folded back, or angled, only near the surface of the fabric band 1.
  • the FRP carrier tape manufactured by using the fabric band 1 of Fig. 15 as a reinforcing material has the same advantages as that of the sixth embodiment, except for the advantage resulting from the use of the core yarns 32a. Since the second yarns are interlaced with the first yarns in the band 1 of Fig. 15, the force required to pull out the second yarns from the fabric 1 is greater as compared with a band where the second yarns are simply inserted in the fabric 1 like the core yarns 32a. Accordingly, when the first yarns 2 are broken, the interlaced second yarns 32b do not come out of the fabric 1.
  • a carrier tape for use in a rapier loom is formed of fiber reinforced plastic.
  • a fabric band (1) is used as a reinforcing material for the plastic.
  • the fabric band (1) is substantially the same size as the carrier tape.
  • the fabric band (1) contains a yarn (2) arranged obliquely to a lengthwise direction of the fabric band (1), and the yarn (2) is woven to be folded, or angled, at the sides of the fabric band (1).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Woven Fabrics (AREA)
EP97119289A 1996-11-05 1997-11-04 Ruban d'insertion et tissu pour métiers à griffes Withdrawn EP0845552A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP8292868A JPH10130994A (ja) 1996-11-05 1996-11-05 レピア織機用キャリアテープ及び繊維構造体
JP292869/96 1996-11-05
JP29286996A JP3520696B2 (ja) 1996-11-05 1996-11-05 レピア織機用キャリアテープ及び繊維構造体
JP292868/96 1996-11-05

Publications (2)

Publication Number Publication Date
EP0845552A2 true EP0845552A2 (fr) 1998-06-03
EP0845552A3 EP0845552A3 (fr) 1999-05-12

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Application Number Title Priority Date Filing Date
EP97119289A Withdrawn EP0845552A3 (fr) 1996-11-05 1997-11-04 Ruban d'insertion et tissu pour métiers à griffes

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Country Link
EP (1) EP0845552A3 (fr)
KR (1) KR19980042060A (fr)
CN (1) CN1183489A (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100580234B1 (ko) * 2004-04-19 2006-05-15 중소기업진흥공단 섬유강화 플라스틱을 이용한 저소음 직기용 프레임
KR101246731B1 (ko) * 2011-05-04 2013-03-25 (주)영원코포레이션 면사와 견사를 이용하여 제직한 고밀도 천연교직물 및 그 제조방법
CN114990778B (zh) * 2022-06-08 2023-04-25 东华大学 旋转型三维编织机编织底盘的设计方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3042054A1 (de) * 1980-11-07 1982-06-03 Lindauer Dornier-Gesellschaft Mbh, 8990 Lindau Greiferstange fuer schuetzenlose webmaschinen
EP0352223A1 (fr) * 1988-07-22 1990-01-24 GebràœDer Sulzer Aktiengesellschaft Dispositif d'insertion de trame d'un métier à tisser à pinces
EP0394639A1 (fr) * 1989-04-25 1990-10-31 Lindauer Dornier Gesellschaft M.B.H Barre à pince en rubans de matière synthétique en fibres renforcées
EP0414214A2 (fr) * 1989-08-24 1991-02-27 Neste Oy Bande résistante à l'abrasion, et procédé pour sa fabrication
DE4035101A1 (de) * 1989-11-03 1991-05-08 Nuovo Pignone Spa Verbessertes bandantriebssystem fuer den schussgreifer in einem schuetzenlosen webstuhl

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3042054A1 (de) * 1980-11-07 1982-06-03 Lindauer Dornier-Gesellschaft Mbh, 8990 Lindau Greiferstange fuer schuetzenlose webmaschinen
EP0352223A1 (fr) * 1988-07-22 1990-01-24 GebràœDer Sulzer Aktiengesellschaft Dispositif d'insertion de trame d'un métier à tisser à pinces
EP0394639A1 (fr) * 1989-04-25 1990-10-31 Lindauer Dornier Gesellschaft M.B.H Barre à pince en rubans de matière synthétique en fibres renforcées
EP0414214A2 (fr) * 1989-08-24 1991-02-27 Neste Oy Bande résistante à l'abrasion, et procédé pour sa fabrication
DE4035101A1 (de) * 1989-11-03 1991-05-08 Nuovo Pignone Spa Verbessertes bandantriebssystem fuer den schussgreifer in einem schuetzenlosen webstuhl

Also Published As

Publication number Publication date
EP0845552A3 (fr) 1999-05-12
CN1183489A (zh) 1998-06-03
KR19980042060A (ko) 1998-08-17

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