WO2015041176A1 - 織機用耳部把持装置、織機および織物の製造方法 - Google Patents
織機用耳部把持装置、織機および織物の製造方法 Download PDFInfo
- Publication number
- WO2015041176A1 WO2015041176A1 PCT/JP2014/074267 JP2014074267W WO2015041176A1 WO 2015041176 A1 WO2015041176 A1 WO 2015041176A1 JP 2014074267 W JP2014074267 W JP 2014074267W WO 2015041176 A1 WO2015041176 A1 WO 2015041176A1
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- Prior art keywords
- ear
- weft
- loom
- fabric
- gripping device
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- 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
- D03D47/40—Forming selvedges
- D03D47/42—Forming selvedges by knitting or interlacing loops of weft
- D03D47/44—Forming selvedges by knitting or interlacing loops of weft with additional selvedge thread
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- 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
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/308—Stretching or holding the weft
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- 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
- D03D49/70—Devices for cutting weft threads
Definitions
- the present invention relates to an ear gripping device for a loom. More specifically, when weaving a high-density fabric, an ear gripping device for a loom for effectively suppressing the occurrence of ear sag in the vicinity of the ear, a loom equipped with the loom, and a method of manufacturing a fabric using the same About.
- Patent Document 2 a method of using a modified cross-section yarn for a part of a plurality of yarns outside the fabric (Patent Document 3), a method of flattening the cross-sectional shape of the warp of the ear (Patent Document 4) ) Is known, but it cannot always be said that it can sufficiently prevent the occurrence of ear sag.
- a pair of gripping rollers are provided at the reach of the flying weft yarn, and the weft yarn is given a restraining tension for a predetermined time until the warp tightening is completed.
- a method of pressing the spring back Patent Document 5
- a method of driving and controlling a weft tensioning device provided at the weft arrival portion
- the present invention provides an ear gripping device for a loom capable of effectively suppressing the retreat of the ear weaving mouth and the occurrence of sagging ears when weaving a high-density fabric at high speed, It is an object of the present invention to provide a loom and a method for manufacturing a woven fabric.
- the present invention comprises the following means.
- the present invention (1) An ear gripping device attached to a loom,
- the ear part gripping device has an ear part passage space through which an ear part formed by entanglement of a yarn and a weft thread can pass in the feeding direction of the fabric, and a weft movement gap through which the weft thread can pass. Even when cut by a weft cutter of a loom, the lobe ear gripping device has means for maintaining the entangled state of the ear.
- the first embodiment is (2) In the loom ear gripping device, the means for maintaining the entangled state of the ear portion is an elastic ear pinching member in the ear portion passage space.
- the second embodiment is (3) The ear gripping device for a loom according to claim 2, wherein the ear elastic clamping member is a plate spring or a member made of an elastic member and a plate material.
- the loom ear gripping device for a loom is a loom that is an ear of a fabric and is present at a position of a weft cut by a weft cutter.
- the loom is gripped by the loom ear gripping device existing in the loom.
- the method for producing a woven fabric comprising a step of gradually releasing the yarn from the ears discharged from the ear part holding device for a loom.
- (7) A method of manufacturing a woven fabric in which a predetermined number of warps are aligned, the additional yarns are aligned outside the aligned warps, and the wefts are supplied to the warps and the additional yarns.
- a method for producing a woven fabric characterized by grasping an ear portion when cutting a weft after being struck.
- the ear part When weaving using the ear part gripping device for a loom according to the invention (1), the ear part is in the ear part gripping device and is maintained so as to maintain the entangled state, thereby preventing the occurrence of weft crimps. It is possible to prevent loosening of the warp and effectively suppress the sagging of the ear.
- the ear portion in the ear gripping device is elastically held by the ear elastic holding member.
- the ears are fed more smoothly and the entangled state between the increased yarns and the wefts is more reliably maintained, so that weft crimps can be prevented and warp slack can be prevented and ear sagging can be effectively suppressed. can do.
- the ear elastic pinching member is composed of a plate spring or a member made of an elastic member and a plate material, so that the structure is simple.
- the ears are fed more smoothly and the entangled state of the increased yarns and wefts is more reliably maintained, so that the weaving at the end of the ears and the occurrence of sagging of the ears are further reduced. Effective and inexpensive deterrence.
- weaving is performed using the loom according to the invention (4), weaving can be performed while effectively suppressing the retreat of the ear end and the occurrence of ear sagging.
- the ear part is in the ear part gripping device and is configured to maintain the entangled state, so that weft crimping can be prevented and warp loosening can be prevented. It is possible to obtain a woven fabric that is prevented and effectively prevents ear sag.
- the yarn is removed from the ear portion discharged from the ear gripping device as the fabric moves, so that the cutting operation of the ear portion is not required, and the additional yarn is wound up separately. And it can be reused.
- the ear portion is configured to maintain its entangled state, so that it is possible to prevent the occurrence of weft crimps, to prevent warp loosening, and to effectively reduce the ear sagging. Deterred fabrics can be obtained.
- the ear gripping device for the loom is installed on the side of the weft nozzle that is the nozzle for launching the weft, and the weft is used for the weft nozzle and the loom Even when it is cut with a weft cutter between the ear gripping devices, the ear portion is in the ear gripping device and is configured to maintain the entangled state. In addition to preventing warp loosening, it is possible to effectively suppress ear sagging.
- the schematic plan view which shows the principal part of the loom including the ear
- the schematic perspective view which shows the ear
- the ear part gripping device for a loom includes an ear part passage space in which an ear part formed by entanglement of a yarn and a weft thread can pass in the feeding direction of the fabric, and a weft movement in which the weft can move in the feeding direction of the fabric.
- the loom ear gripping device has a gap and has means for maintaining the entangled state of the ear even when the weft is cut by a weft cutter.
- an auricle is a weft thread that is cut from a weft nozzle and then protrudes from the fabric.
- Thickening is a thread that is inserted in the warp direction outside the fabric to entangle the auricle separately from the fabric yarn.
- wefts are inserted between the yarns to form a state where the yarns and the wefts cross each other at different positions, that is, entangled.
- the ear part is a part where the auricle and the yarn are entangled.
- FIG. 1 is a schematic plan view showing an outline of weaving when the ear part gripping device for a loom of the present invention is installed on the weft nozzle side.
- 1 is a warp
- 2 is a yarn
- 3 is a kite
- 4 is a weft nozzle.
- Reference numeral 5 is a weft
- 6 is a weft cutter
- 7 is an ear gripping device for a loom
- 8 is an auricle
- 9 is a bran wing.
- the weaving there are a plurality of warps on the right side of FIG. 1, and wefts 5 and heels 3 are further extended, but are not shown.
- the weft 5 supplied from the weft nozzle 4 is inserted between the wefts 2 supplied from the yarn supply device (not shown) and between the warps 1 supplied from the warp supply device (not shown).
- the weft 5 inserted between the warps 1 is driven by the reed 3 and the reed wing 9 to form the fabric 10 and the ear part 11.
- the tip of the driven weft 5 is usually entangled by a catch cord (not shown) or the like, and the weft tension is maintained for a predetermined time. Thereafter, the anti-nozzle side weft cutter (not shown) is interposed between the fabric 10 and the catch cord. ) And the catch cord is collected.
- the ear portion 11 in which the yarn 2 and the weft yarn 5 are entangled is supplied to the loom ear gripping device 7 without being beaten, and moves in the ear gripping device in synchronization with the movement of the fabric 10 and the ear chamber 8. To do. At this time, the weft 5 is cut by the weft cutter 6 immediately after beating, but the ear 11 after the weft cut is in the ear gripping device and the entangled state is maintained, so that weft crimp is generated. And warp loosening can be prevented.
- the ear part 11 from which the weft has been cut is directly discharged from the ear part holding device and moves together with the fabric 10.
- the entangled state between the increased yarn 2 and the auricle 8 is not maintained when the ear 11 is ejected from the loom ear gripping device.
- the auricle 8 gradually moves away from the yarn increase 2.
- Reinforcement yarn 2 moves alone.
- the fabric 10 and the ear chamber 8 move together.
- the increased yarn 2 is collected through a guide (not shown) on the same route as the catch cord on the side opposite to the weft nozzle (not the weft nozzle) or by another winding device.
- the length of gripping the ears (that is, the length in the longitudinal direction of the fabric where the means for maintaining the entangled state of the fabric ears presses the ears.
- the part gripping length is preferably 2 to 15 mm, and more preferably 3 to 10 mm. By setting it within this range, high tension can be maintained even if the weft is cut after beating, and the fabric structure can be stabilized.
- the width for gripping the ear part (that is, the length in the direction perpendicular to the longitudinal direction of the fabric in which the ear part gripping device for a loom grips the ear part (the direction in which the yarns forming the ear part are arranged). It is preferably a width that can grip the entire ear portion.
- the present invention is not limited to the above as long as the width can maintain a high tension in order to stabilize the woven fabric structure even if the weft is cut after beating.
- gripping apparatus for looms is distribute
- the loom ear gripping device is disposed on the side of the anti-weft nozzle, it is preferably provided between the fabric and the weft cutter on the side of the anti-weft nozzle.
- the yarns are aligned on the anti-weft nozzle side of the fabric, forming an ear portion entangled with the driven weft yarn, and the ear portion gripping device for the loom in the vicinity of the ear portion before weaving Is preferably arranged.
- the loom ear gripping device on the weft nozzle side and the loom ear gripping device on the anti-weft nozzle side face each other through the warp of the fabric so that the weft tension is most maintained.
- FIG. 2 is an enlarged schematic perspective view of the loom ear gripping device 7 according to the present invention installed on the weft nozzle 4 side.
- 1 is a warp yarn
- 2 is a warp yarn
- 4 is a weft nozzle
- 5 is a weft yarn
- 8 is an auricle
- 10 is a fabric
- 11 is an ear.
- the fabric 10 is fed from the upper right side of the drawing to the lower left side of the drawing. Further, there are a plurality of warps in the lower right part of the drawing, and the wefts 5 further extend, but are not shown.
- the loom ear gripping device 7 is desirably provided at least on the weft nozzle side of the fabric 10, but in addition to this, it is preferably provided on the anti-weft nozzle side.
- the ear gripping device 7 for a loom has an ear outlet 71B from an ear passage space through which an ear 11 formed by entanglement of the yarn 2 and the weft 5 can pass in the direction of feeding the fabric,
- An ear entrance 71A (not shown) to the ear passage space formed on the upstream side of the yarn-increasing yarn 2 of the loom ear gripping device 7 is provided.
- the exit 72B of the ear part is a fabric side weft moving gap for allowing the auricle 8 to move parallel to the delivery direction of the fabric 10, and the weft nozzle side weft (not shown) is provided on the weft nozzle side of the loom ear gripping device 7.
- a moving gap 72A is formed.
- the ear part 11 enters the ear part passing space part from the entrance 71A of the ear part passing space along the feeding direction of the fabric 10, and the ear chamber 8 is located between the nozzle side weft moving gap 72A and the fabric side ear moving gap part 72B.
- the weft 5 is cut by the weft cutter between the weft nozzle 4 and the loom ear gripping device 7 in the ear portion passage space. Even in such a case, the confounding state of the ear is maintained.
- Examples of means for maintaining the entangled state of the ear part 11 in the loom ear gripping apparatus include a slidable member that does not hinder the movement of the ear part in the ear part passage space.
- a method of appropriately setting the ear passage space size according to the ear portion dimension so that the ear portion 11 can be gripped can be adopted, but the ear portion is placed in the ear passage space of the loom ear gripping device.
- the method of arranging the ear elastic holding member that holds elastically is simpler and more reliable.
- the ear elastic holding member a rubber plate or a resin plate provided in the ear passing space can be used, or a member made of an elastic member such as a coil spring or rubber and a plate material such as metal can be used. Further, it is advantageous in terms of structure and simplicity, that is, cost, to use a leaf spring fixed in the ear passage space.
- the contact portion with the ear portion preferably has a bottom friction surface.
- FIG. 3 is a schematic cross-sectional view of a loom ear gripping device using a pair of leaf springs 74A and 74B as the ear elastic pinching member.
- FIG. 2 when cutting at a surface perpendicular to the weft 5 in FIG. Equivalent to.
- the ear portion 11 is in an entangled state with the additional yarn 2 and the weft yarn 5 from the right side to the left side of the drawing, that is, the entrance to the ear portion passage space. It moves from 71A to the exit 71B from the ear part passage space.
- 74A and 74B are a pair of holding members such as a pair of carbon steel leaf springs in the ear part passage space part, and are fixed to the upper and lower wall surfaces of the ear part passage space part by two bolts 73, respectively. Therefore, the elastic ear member holds the ear portion 11 in the ear portion passing space portion from the upper and lower surfaces to the leaf springs 74A and 74B.
- the cut weft thread 5 is prevented from coming out or loosening from the ear section 11,
- the part 11 is in the lobe ear gripping device 7 and maintains its entangled state.
- the ear part 11 moves in the ear part passage space part, is discharged from the ear part gripping device 7 for looms, and the fabric 10 moves together with the auricle 8, the entangled state between the yarn 2 and the cut auricle 8 is loosened, As described above, the cut ear chamber 8 is gradually separated from the yarn 2 and the yarn 2 is singly separated from the fabric 10 and the ear chamber 8.
- the elastic ear pinching members are not necessarily configured as a pair, and may be an upper (or lower) wall surface in the ear passage section and a single leaf spring disposed below (or above) the wall portion.
- Various types of leaf spring shapes can be adopted, but in order to hold the ear portion with a uniform stress over a certain length, as shown in FIG. 3, a planar shape and two arc shapes at both ends thereof are formed. It is preferable to use a pair of leaf springs 74A and 74B provided.
- the length and width of the plate-shaped portion and the thickness of the leaf spring material are determined from the ear gripping device 7 for a loom, taking into account the number and thickness of the yarns constituting the ear, the thickness of the ear, etc.
- the material is not limited to carbon steel, and stainless steel, phosphor bronze, beryllium copper, resin, and the like can also be employed.
- FIG. 4 is a schematic cross-sectional view of the loom ear gripping device 7 shown in FIG. 3 cut along a plane perpendicular to the feeding direction of the yarn 2.
- 72A is a weft movement gap for moving the weft (before and after cutting) on the weft nozzle side together with the ear part
- 72B is for moving the weft 5 inserted in the weft 10 feeding direction.
- the weft movement gap can adjust the gap so that the entangled portion (that is, the ear portion) between the weft passing through the weft thread but in the entangled state and the weft thread does not pass through.
- the height of the weft movement gap is preferably smaller than the height of the entrance and exit of the ear portion passage space.
- the fabric woven using the loom ear gripping device according to the present invention is particularly useful when weaving a high-density fabric typically used in sports clothing and industrial materials, but is not limited thereto. It is not a thing.
- the warp and weft yarns used for weaving are not particularly limited, and chemical fibers, natural fibers, and the like can be used.
- chemical fibers include polyamide fibers, polyester fibers, aramid fibers, rayon fibers, polysulfone fibers, ultrahigh molecular weight polyethylene fibers, and natural fibers such as cotton, hemp, silk, and wool.
- polyamide fibers and polyester fibers excellent in mass productivity and economy are preferable.
- Polyamide fibers are preferable from the viewpoint of heat resistance and fluff products. More preferred are fibers.
- polyamide fibers examples include nylon 6, nylon 66, nylon 12, nylon 46, copolymer polyamide of nylon 6 and nylon 66, and copolymer obtained by copolymerizing nylon 6 with polyalkylene glycol, dicarboxylic acid, amine, and the like. Mention may be made of fibers made of polyamide or the like.
- polyester fiber examples include fibers made of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and the like.
- a fiber obtained by copolymerizing polyethylene terephthalate or polybutylene terephthalate with isophthalic acid or 5-sodium sulfoisophthalic acid as an aromatic dicarboxylic acid component or a fiber obtained by copolymerizing an aliphatic dicarboxylic acid such as adipic acid may be used.
- these synthetic fibers have a heat stabilizer, an antioxidant, a light stabilizer, a smoothing agent, an antistatic agent, a plasticizer, in order to improve productivity in spinning / drawing process and processing process, or characteristics.
- Additives such as thickeners, pigments, and flame retardants may be included.
- multifilament yarn is preferably used in that the effect of the present invention is remarkably exhibited.
- the single yarn cross-sectional shape is not limited to a round shape, and may be any shape.
- a left-right asymmetric type such as a flat shape, a rectangular shape, a rhombus shape, and a saddle shape, a left-right asymmetric type, or a combination type thereof may be used.
- the fabric produced using the loom ear gripping device according to the present invention can use a plain structure, a twill structure, a satin structure, and a deformed structure thereof, but is not particularly limited thereto.
- the woven fabric manufactured using the loom ear gripping device according to the present invention is woven using warp yarns, weft yarns, and additional yarns as basic yarns.
- multiplying is used to prevent the wefts from loosening by sandwiching the wefts by utilizing the rigidity thereof, and forms the ear portion by entanglement with the wefts.
- a predetermined number of warps are aligned, and additional yarns are aligned on the outside of the aligned warps, wefts are supplied and driven, and weaving of the fabric is performed.
- the fabric is discharged from the ear portion gripping device for the loom of the fabric.
- the ear gripped by the loom ear gripping device in the vicinity of the ear portion before weaving moves in the loom ear gripping device in synchronization with the movement of the fabric, and is then discharged.
- the ejected ear part moves with the movement of the fabric, but as described above, the yarn is gradually removed from the cut part of the weft of the ear as described above, so the finished fabric does not contain the yarn. That is, the warp yarn is supplied by a feeding device different from the warp yarn, but the warp yarn is passed through the heald and the heel, whereas the warp yarn does not pass through the heel and is entangled by the opening movement similar to the warp yarn. At the same time, an ear portion is formed and passed through the loom ear gripping device. The thickening is supplied from the vicinity of the warp beam, applied with a spring-type tensor, and passed through the opening heald.
- the weft is made to fly with high-pressure water or air, and after the warp and weft are driven with a scissors, the weft is cut with a weft cutter.
- the ear part gripping device for a loom according to the present invention grips so as to maintain the entangled state of the ear part, the cut weft is prevented from coming off or loosening from the ear part.
- edge part becomes small and the crimp of a warp becomes large.
- the warp tension is increased, the gripping force of the weft is increased, and the weaving of the ear is reduced. Therefore, since the fabric length difference between the ear end portion and the center portion of the fabric is reduced, the amount of arc shape is reduced, and the ear sagging can be improved.
- the weave before weaving is expressed by the distance from the temple tip to the weave.
- wefts are caused to fly by high-pressure water or compressed air, high tension is applied to the wefts.
- the weft is cut with a cutter after the weft has been driven by the scissors, the free end of the weft returns to the ground side.
- a decrease in the weft tension at the ear portion of the woven fabric results in a larger crimp of the weft yarn, and conversely, a smaller warp crimp at the ear portion, resulting in a lower warp tension at the ear portion.
- there is no gripping force of the weft by the warp and the retreat of the weave becomes large.
- the amount of the arc shape of the fabric increases, leading to the generation of sag and deterioration of the physical properties of the fabric.
- weaving using the loom ear gripping device solves the above problems.
- the weaving using the weaving ear gripping device it is usual to supply the thread increase from a triangular cone or a paper tube without using a planetary device or a bobbin.
- a spring washer it is preferable to use a spring washer in order to manage the tension during supply.
- the yarn increase is a multifilament or a crimped yarn because the variation in tension of the yarn during weaving is small by giving an appropriate crimp.
- the material of the yarn addition is not particularly limited, but is preferably selected so that polyester or nylon is generally easily available and the yarn characteristics with the warp are close.
- the total fineness of the added yarn is preferably larger than the total fineness of the weft. This is because the entanglement strength between the weft and the weft at the ear is kept larger than the entanglement strength between the warp and the weft, and the weft after cutting is prevented from falling off or loosening from the ear.
- the number of yarns added is preferably 4 to 8 from the viewpoint of maximizing the effects of the present invention.
- the fabric using the loom ear gripping device according to the present invention is preferably woven in a jet loom because it can be operated at high speed.
- the water jet loom is preferable in that the effect of the present invention is remarkably exhibited.
- the weft yarn is caused to fly by high-pressure water, and after the weft yarn is driven, the weft yarn is cut at the weft nozzle side.
- water jet looms tend to have higher weft flying tension than air jet looms and rapier looms, and further improvement in the weft gripping force of the ears is required. This is because the effects of the use of the additional yarn (multiplier yarn) and the ear part gripping device for a loom of the present invention are remarkable.
- the width of the woven fabric is not particularly limited, the wider the width, the more likely the ear sag occurs. Therefore, for example, it is particularly useful in a woven fabric having a warp-only region of 140 cm or more, particularly 180 cm or more.
- the upper limit is preferably 280 cm or less from the viewpoint of production.
- the tension of the warp and the additional yarn is preferably 10 to 250 cN / line, more preferably 20 to 200 cN / line. By setting it within such a range, voids between single fibers in a yarn bundle of yarns constituting the fabric can be reduced, and a dense fabric can be obtained.
- the warped yarns that have been tensioned above push and bend the weft to increase the fabric binding force in the weft direction, improve the fabric's pile misalignment, and strengthen the seam portion of the sewn product. can do.
- the warp tension When the warp tension is small, the contact area between the warp and the weft in the woven fabric cannot be increased, and it is difficult to obtain a sliding resistance force to a desired position, and the effect of reducing the gap between the single fibers is small.
- the warp tension is too high, the warp tends to be fluffed by friction with heald mail.
- Specific methods for adjusting the warp tension within the above range include adjusting the weft feed speed of the loom and adjusting the weft driving speed. Whether or not the warp tension is actually within the above range during weaving can be confirmed, for example, by measuring the tension applied per warp in the middle of the weaving machine between the warp beam and the back roller. . Moreover, it is preferable to make a difference between the upper thread sheet tension and the lower thread sheet tension at the warp opening.
- the back roller height is set at a position 10 to 30 mm higher than the horizontal position, for example, so that the running line length of the upper thread and the lower thread is different.
- a cam drive system is adopted in the opening device, and the dwell angle on one side of the upper thread / lower thread is set to be 100 degrees or more larger than the other.
- the tension increases when the dwell angle is increased.
- processing such as scouring and heat setting is performed after the weaving process.
- the woven fabric woven using the loom ear gripping device according to the present invention can effectively suppress the retraction of the fold of the ear and the occurrence of sagging ears even when weaving at high speed. For example, even when the loom is operated at a high speed of about 400 to 900 rpm, the occurrence of ear slack is extremely suppressed, so that it can be cut into a shape as designed and sewing is easy. In addition, since the occurrence of ear sag is suppressed, it is advantageous in terms of cost with less fabric disposal.
- the distance between the lines 103A and 103B in the weft direction shows that the peripheral part tends to be wider than the central part. Accordingly, the distance between the two weft-direction lines 103A and 103B is 500 mm at the center of the fabric, but when the ear slack increases, both ends of the fabric weft nozzle side 101A are not on the fabric weft nozzle side. The distance between the two lines 103A and 103B in the weft direction becomes wider toward the end 101B side.
- the warp direction lines 104A and 104B are drawn and cut along the weft direction lines 103A and 103B and the warp direction 104A and 104B to obtain strips having a shape close to two rectangles formed at the ends of the fabric.
- the length of the strip in the warp direction (that is, the length direction) was measured to evaluate the ear sag.
- Example (Warp and weft) A multifilament made of polyester, having a circular cross-sectional shape, having a single fiber fineness of 2.33 dtex, a filament count of 36, a total fineness of 84 dtex, no twist, a strength of 4.21 cN / dtex, and an elongation of 40% was prepared.
- the warp tension during weaving is 20 cN / piece
- the loom rotation speed is 500 rpm
- the warp density is 133 pieces / 2.54 cm.
- the warp yarn is made of polyester, has a circular cross-sectional shape, and uses three twisted yarns having a single fiber fineness of 3.44 dtex, a filament count of 96 f, and a total fineness of 330 dtex, and a predetermined number of warps.
- the four yarns were supplied to both the outer sides of the yarns and aligned, and the yarn tension was set at 130 cN / piece.
- a gap of 5 mm was provided between the warp and the yarn for the auricle.
- the ejected ear part was gradually removed from the thread in the ear chamber, and the thread was recovered through the guide along the same route as the catch cord on the side of the counter weft nozzle.
- the ear portion includes an ear portion passage space portion in which an ear portion formed by entanglement of a yarn and a weft yarn can pass in the fabric feeding direction, and a weft movement gap portion in which the weft yarn can move in the fabric feeding direction.
- the two weaving ear gripping devices shown in FIG. 3 provided with a pair of leaf springs arranged in the passage space are installed at the respective ends of the weft nozzle side and the counter-weft nozzle side in the vicinity of the weaving machine before weaving.
- the main body of the weaving ear gripping device 7 has a rectangular parallelepiped shape (width 6 mm, height 30 mm, length 25 mm) made of stainless steel. As shown in FIG. 3, the weaving ear gripping device 7 includes an inlet 71 ⁇ / b> A to the ear part passage space having a width of 4 mm and a height of 10 mm and an outlet 72 ⁇ / b> A from the ear part passage space. And two elastic ear
- the two elastic lug clamping members are made of stainless steel having a thickness of 0.3 mm, and each of the plate springs 74A and 74B is composed of leaf springs 74A and 74B and leaf spring supports 75A and 75B, and has a length of 20 mm.
- An arc portion is provided at both ends of the flat plate portion, and is fixed to the leaf spring supports 75A and 75B by bolts.
- the ear gripping length was 20 mm
- the ear gripping width was 4 mm.
- the ear portion is sandwiched between the flat plate portions of the pair of leaf springs so that the ear portion passes in synchronization with the flow of the fabric. Further, as shown in FIG.
- weft nozzle side weft movement gaps 72 ⁇ / b> A and fabric side ear movement gaps 72 ⁇ / b> B are formed on both sides of the weaving ear part gripping device 7.
- the width of the gap is slightly larger than the diameter of the weft, but is smaller than the thickness of the ear portion where the weft and the yarn are entangled. As a result, the wefts move in parallel along the flow of the fabric, but even after the wefts are cut by the weft cutter, the ears do not come out from the weft movement gap to the fabric side.
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- Textile Engineering (AREA)
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- Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
- Woven Fabrics (AREA)
Abstract
Description
(a)織り前近傍の織物がバンピング現象を起こし、所望の緯糸密度の織物が得られにくくなる。
(b)経糸が毛羽を誘発し、安定して製織することができなくなる。
(c)織機回転数を高速化すると、耳部の織り口が筬の前進位置よりも経糸の送り出し側に移動する量が大きくなる現象が更に顕著に現れる。耳部の経糸緩みにより、耳部と中央部との布長差が生じ、耳部の波打ち現象、いわゆる耳たるみ(日本語では他に「耳弛み」、「耳たぶり」とも言う。)が出現する。織物は、裁断、縫製により所望の製品に形成されるが、織物を目的の用途に最大限有効利用するため、通常、織物の端部の近くまで使用される。裁断品の端はほつれ易いため、耳部近傍に耳たるみが発生していると、裁断不良が生じ、製品としての形状が確保できなかったり機能を発揮しなかったりする。
(d)生機での耳たるみは、ロール巻き工程、精練工程、セット工程それぞれの加工通過性に支障を及ぼすばかりでなく、得られる織物の皺発生の原因にもなる。
耳たるみの発生を抑止する技術として、製織に耳部の織密度を織物本体部分の織密度より高くする方法(特許文献1)、地糸と絡糸からなる耳部にさらに増糸を打ち込む方法(特許文献2)、織物の外側にある複数の増糸の一部に異型断面糸絡糸を使用する方法(特許文献3)、耳部の経糸の断面形状を扁平にする方法(特許文献4)などが知られているが、必ずしも十分に耳たるみの発生を抑止しえるものとは言えない。
本発明は、
(1)織機に取り付けられる耳部把持装置であって、
前記耳部把持装置は、増糸と緯糸とが交絡してなる耳部が織物の送り出し方向に通過可能な耳部通過空間と、緯糸が通過可能な緯糸移動空隙とを有し、前記緯糸が織機の緯糸カッターで切断された場合にあっても、前記耳部の交絡状態を維持する手段を有する織機用耳部把持装置である。
第一の実施形態は、
(2)前記耳部の交絡状態を維持する手段が、前記耳部通過空間にある弾性の耳部挟持部材である前記織機用耳部把持装置である。
第二の実施形態は、
(3)前記耳部弾性挟持部材が板バネ、または弾性部材と板材とからなる部材である請求項2記載の織機用耳部把持装置である。
また別の発明としては、
(4)前記いずれか織機用耳部把持装置が、織物の耳部であって、緯糸カッターによって切断される緯糸の位置に存在する織機である。
また別の発明として、
(5)経糸を所定本数引き揃え、引き揃えた経糸より外側に増糸を引き揃え、経糸および増糸に対して緯糸を供給する織物の製造方法であって、前記織機を用い、緯糸を切断する際に前記織機に存在する織機用耳部把持装置で耳部を把持することを特徴とする織物の製造方法である。
またその実施態様としては、
(6)織機用耳部把持装置から排出された耳部から徐々に増糸が離脱する工程を有する前記織物の製造方法である。
また織物の別の製造方法の発明としては、
(7) 経糸を所定本数引き揃え、引き揃えた経糸より外側に増糸を引き揃え、経糸および増糸に対して緯糸を供給する織物の製造方法であって、緯糸を供給し、織物へ筬打ちした後、緯糸を切断する際に、耳部を把持することを特徴とする織物の製造方法。
このようなメカニズムで、緯糸カット後の緯糸クリンプや経糸緩みが生ぜず、耳端部の織り口の後退や耳たるみの発生が効果的に抑止される。
(1)総繊度
JIS L 1013:2010 8.3.1 A法により、所定荷重0.045cN/dtexで正量繊度を測定して総繊度とした。
JIS L 1013:2010 8.4の方法で算出した。
総繊度を単繊維数で除することで算出した。
JIS L 1096:2010 8.6.1に基づき測定した。
試料を平らな台上に置き、不自然なしわや張力を除いて、異なる5カ所について2.54cm間のタテ糸およびヨコ糸の本数を数え、それぞれの平均値を算出した。
JIS L 1013:2010 8.5.1標準時試験に示される定速伸長条件で測定した。試料をオリエンテック社製“テンシロン”(TENSILON)UCT-100を用い、掴み間隔は25cm、引張り速度は30cm/分で行った。なお、伸度はS-S曲線における最大強力を示した点の伸びから求めた。
金井工機(株)製“チェックマスター”(登録商標)(形式:CM-200FR)を用い、織機稼動中に経糸ビームとバックローラーとの中間において、経糸一本当たりに加わる張力を測定した。
図5に示すように、織物10の幅方向の中心部に500mmの間隔で2点の印(102A、102B)を付し、各々の織物中心部の印102A、102Bから幅方向両端である織物の緯糸ノズル側端部101A、織物の反緯糸ノズル側端部102B方向に、緯糸に沿って2本の線(103A、103B)を引く。この場合、織物10の交絡状態は、中心部に比べて両サイド側で緩みがちになるので、2本の線は図5に示すように両サイド側で織前側に湾曲し、かつ、2本の線、すなわち緯糸方向の線103A、103Bの間隔は、周辺部のほうが中心部より広くなる傾向を示す。従って、織物の中央部では2本の緯糸方向の線103A、103Bの距離は500mmであるが、耳たるみが大きくなると両サイドである織物の緯糸ノズル側の端部101A、織物の緯糸ノズル側でない側の端部101B側ほど2本の緯糸方向の線103Aと103Bとの間隔は広くなる。
(経糸・緯糸)
ポリエステルからなり、円形の断面形状を有し、単繊維繊度2.33dtex、フィラメント数36、総繊度84dtex、無撚りで、強度4.21cN/dtex、伸度40%のマルチフィラメントを準備した。
上記の糸を経糸、緯糸に用い、後述する製織用耳部把持装置を付設したウォータージェットルームで、製織時の経糸張力を20cN/本、織機回転数は500rpm、経糸密度133本/2.54cm、緯糸密度133本/2.54cm、幅(経糸が存在する部分の幅)200cmの平織物を製織した。
増糸と緯糸とが交絡してなる耳部が織物の送り出し方向に通過可能な耳部通過空間部と、緯糸が織物の送り出し方向に移動可能な緯糸移動空隙部とを備えるとともに、前記耳部通過空間部に配した1対の板バネを供えた図3の製織用耳部把持装置2機を、織機の織り前近傍の緯糸ノズル側および反緯糸ノズル側それぞれの端に、設置した。
製織用耳部把持装置と増糸を用いない以外は実施例と同様の方法で、製織した。
以下に実施例、比較例によって得られた織物を上記耳たるみの評価方法で評価した。短冊体の長さを示す。これから明らかなように、本発明にかかる製織用耳部把持装置を用いて製織した織物は、耳端部の織り口の後退や耳たるみの発生が減少していた。
[実施例の耳たるみ]
L側:510.5mm
R側:512.5mm
[比較例の耳たるみ]
L側:518.0mm
R側:520.0mm
2 増糸
3 筬
4 緯糸ノズル
5 緯糸
6 緯糸カッター
7 織機用耳部把持装置
8 耳房
9 筬親羽
10 織物
11 耳部
71A 耳部通過空間部の入口
71B 耳部通過空間部の出口
72A 緯糸ノズル側緯糸移動空隙、
72B 織物側緯糸移動空隙
73 ボルト
74A、74B 板バネ
75A、75B 板バネ支持体
101A 織物の緯糸ノズル側端部
101B 織物の緯糸ノズル側でない側の端部
102A、102B 織物中心部の印
103A、103B 緯糸に沿った線
104A、104B 経糸に沿った線
L、R 短冊
X 緯糸方向
Y 経糸方向
Claims (7)
- 織機に取り付けられる耳部把持装置であって、
前記耳部把持装置は、増糸と緯糸とが交絡してなる耳部が織物の送り出し方向に通過可能な耳部通過空間と、緯糸が通過可能な緯糸移動空隙とを有し、前記緯糸が織機の緯糸カッターで切断された場合にあっても、前記耳部の交絡状態を維持する手段を有する織機用耳部把持装置。 - 前記耳部の交絡状態を維持する手段が、前記耳部通過空間にある弾性の耳部挟持部材である請求項1記載の織機用耳部把持装置。
- 前記耳部弾性挟持部材が板バネ、または弾性部材と板材とからなる部材である請求項2記載の織機用耳部把持装置。
- 請求項1~3のいずれか記載の織機用耳部把持装置が、織物の耳部であって、緯糸カッターによって切断される緯糸の位置に存在する織機。
- 経糸を所定本数引き揃え、引き揃えた経糸より外側に増糸を引き揃え、経糸および増糸に対して緯糸を供給する織物の製造方法であって、請求項4記載の織機を用い、緯糸を切断する際に前記織機に存在する織機用耳部把持装置で耳部を把持することを特徴とする織物の製造方法。
- 織機用耳部把持装置から排出された耳部から徐々に増糸が離脱する工程を有する請求項5記載の織物の製造方法。
- 経糸を所定本数引き揃え、引き揃えた経糸より外側に増糸を引き揃え、経糸および増糸に対して緯糸を供給する織物の製造方法であって、緯糸を供給し、織物へ筬打ちした後、緯糸を切断する際に、増糸と緯糸とが交絡してなる耳部を把持することを特徴とする織物の製造方法。
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US15/022,059 US20160222555A1 (en) | 2013-09-17 | 2014-09-12 | Selvage portion gripping device for loom, loom, and method of manufacturing woven fabric |
CN201480051220.5A CN105531412B (zh) | 2013-09-17 | 2014-09-12 | 织机用织边部把持装置、织机及织物的制造方法 |
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EP3048194B1 (en) | 2019-11-06 |
US20160222555A1 (en) | 2016-08-04 |
CN105531412A (zh) | 2016-04-27 |
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