EP1894873B1 - Filière de décordage - Google Patents

Filière de décordage Download PDF

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Publication number
EP1894873B1
EP1894873B1 EP07111717A EP07111717A EP1894873B1 EP 1894873 B1 EP1894873 B1 EP 1894873B1 EP 07111717 A EP07111717 A EP 07111717A EP 07111717 A EP07111717 A EP 07111717A EP 1894873 B1 EP1894873 B1 EP 1894873B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
yarn
untwisting
hole
main body
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.)
Ceased
Application number
EP07111717A
Other languages
German (de)
English (en)
Other versions
EP1894873A1 (fr
Inventor
Takeshi Tamura
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.)
Murata Machinery Ltd
Original Assignee
Murata Machinery 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
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP1894873A1 publication Critical patent/EP1894873A1/fr
Application granted granted Critical
Publication of EP1894873B1 publication Critical patent/EP1894873B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
    • B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
    • B65H69/063—Preparation of the yarn ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to an air blast type untwisting nozzle that untwists a yarn end by ejecting compressed air from a nozzle hole to the yarn end.
  • the untwisting nozzle is applied to a yarn splicing device that splices untwisted yarn ends together.
  • Some types of untwisting nozzles for yarn splicing devices apply whirling current to a yarn end drawn into a nozzle pipe to untwist the yarn end (see, for example, the Unexamined Japanese Patent Application Publication (Tokkai-Hei) No. 5-9824 ).
  • whirling current type untwisting nozzle appropriately untwists a spun yarn comprising twisted short fibers such as a cotton yarn
  • the nozzle fails to successfully untwist a yarn end of a hemp yarn or the like formed by an wet spinning under the effect of paste or glue used to join fibers together.
  • the process executed in the nozzle pipe using the whirling current is disadvantageously likely to form a part that appears to have been untwisted but then twisted again (re-twisted part).
  • an air blast type untwisting nozzle using the compressed air is often used for a process of untwisting an wet spun yarn such as a hemp yarn.
  • Such an air blast type untwisting nozzle positions a yarn end right opposite to a nozzle hole and ejects the compressed air to the yarn end to untwist the yarn end.
  • This nozzle does not execute an untwisting process by ejecting the whirling current in the nozzle pipe.
  • this nozzle is suitable for a process of untwisting long fibers such as a hemp yarn.
  • a problem with the above air blast type untwisting nozzle is that it is difficult to controllably position the yarn end right opposite to the nozzle hole, so that the yarn end may be displaced at the moment of blasting, resulting in an incomplete untwisting process. Further, disadvantageously, the displaced yarn end may make it difficult to efficiently execute an untwisting process by means of a single blasting operation, resulting in the need to take action such as multiple blasting operations.
  • the present invention set forth in Claim 1 is an air blast type untwisting nozzle that untwists a yarn end by ejecting the compressed air from a nozzle hole to the yarn end, the untwisting nozzle being characterized in that a guide piece having a slit for position control of the yarn end is provided at a position opposite to the nozzle hole and at a predetermined distance from the nozzle hole.
  • the untwisting nozzle takes a form such that the slit is formed by notching so as to extend inward from an edge of the guide piece and an inner end of the slit is formed at a position opposite to the nozzle hole.
  • the untwisting nozzle takes a form such that the untwisting nozzle comprises a main body portion having the nozzle hole and an inner channel that is in communication with the nozzle hole, and the guide piece provided at a position opposite to the nozzle hole in the main body portion, and the main body portion and the guide piece are integrated into a unit part.
  • the guide piece having the slit for position control of a yarn end is provided at the position opposite to the nozzle hole and at the predetermined distance from the nozzle hole. Consequently, the slit can be used to reliably control the position of the yarn end so as to prevent the yarn end from deviating from the direction in which the compressed air is ejected or from being pointed in a direction irrelevant to the ejecting direction. This allows an untwisting process to be executed by ejecting the compressed air with the yarn end held in an appropriate position. Thus, a possible inappropriate untwisting operation can be prevented to improve the reliability and process efficiency of the untwisting process.
  • the untwisting nozzle including the guide piece can be handled as a single part. This allows the untwisting nozzle to be easily and reliably assembled to a yarn splicing device with reduced amounts of time and effort.
  • the main body portion and the guide piece integrated into a unit part make it possible to always provide stable untwisting performance without the need for the position adjustment of the slit with respect to the nozzle hole.
  • Figure 1 is a perspective view showing the general configuration of the untwisting nozzle.
  • Figure 2A is a side view of the untwisting nozzle.
  • Figure 2B is a plan view of the untwisting nozzle.
  • Figure 2C is a front view of the untwisting nozzle.
  • Figure 3 is a diagram of a yarn splicing device having the untwisting nozzle.
  • the direction in which the compressed air is ejected from a nozzle hole 2 shown in Figure 1 is defined as a "forward direction”, and the opposite to direction is defined as a "backward direction”.
  • a direction orthogonal to the forward-backward direction in a horizontal direction is defined as a "rightward-leftward direction”
  • a vertical direction is defined as an "upward-downward direction”.
  • an untwisting nozzle 1 is a unit part composed of a main body portion 4 having a nozzle hole 2 and an inner channel 3 that is in communication with the nozzle hole 2, and a guide piece 6 integrally installed on the main body portion 4 with a bolt 5 having a hexagonal hole.
  • the front surface of the main body portion 4 comprises a pocket 7 that is open in the top surface, the bottom surface, and the right surface thereof.
  • the main body portion 4 is a plastic molded article shaped like a deformed column formed like a block and extending in the forward-backward direction.
  • the main body portion 4 has the nozzle hole 2 formed in the front surface and serving as an air blowing opening for the compressed air, and an air introduction opening 8 for the compressed air formed in the left side surface.
  • the inner channel 3 shaped like the letter U as viewed from above is formed in the block so as to connect the nozzle hole 2 and the air introduction opening 8 together. Compressed air fed from the air introduction opening 8 passes through the inner channel 3 and is then ejected from the nozzle hole 2 into the pocket 7.
  • the front surface of the main body portion 4 is a stepped surface made of a first surface 9a on which the guide piece 6 is installed and a second surface 9b formed more rearward than the first surface 9a.
  • a screw hole (not shown in the drawings) for the bolt 5 is formed in the first surface 9a.
  • the nozzle hole 2 is formed in the second surface 9b.
  • a corner portion defined by the top surface of the main body portion 4 and a part of the right side surface thereof is chamfered.
  • the guide piece 6 is a planar metal plate composed of a rectangular principal surface wall 10 fixed to the first surface 9a of the main body portion 4 with the bolt 5 and an arm wall 11 formed so as to extend in the rightward direction from the principal surface wall 10.
  • the arm wall 11 lies near and opposite to the second surface 9b of the main body portion 4 across the pocket 7, and the arm wall 11 is tapered so that the width of the arm wall 11 in the upward-downward direction decreases as the arm wall 11 approaches its free end (rightward).
  • a slit 12 is formed, by notching, at a base end portion of the arm wall 11 to receive a yarn end Y to control the position of the yarn end Y, and extends downward direction from an upper edge of the arm wall 11.
  • the slit 12 is straight and has a uniform lateral width dimension in the upward-downward direction.
  • an inner end 12b of the slit 12 lies opposite to the nozzle hole 2 across the pocket 7.
  • the inner end 12b of the slit 12 is a recessed arcuate surface.
  • the yarn end Y is passed through the pocket 7, and the compressed air is fed from the air introduction opening 8. Compressed air is thus ejected in the forward direction from the nozzle hole 2 via the inner channel 3.
  • the ejection of the compressed air bends the yarn end Y at a right angle in front of the inner end 12b of the slit 12 to untwist a tip portion of the yarn end Y extending in the forward direction from the guide piece 6. That is, the yarn end Y is brought into a state suitable for yarn splicing.
  • the yarn end Y can be controllably positioned at the inner end 12b of the slit 12.
  • the yarn end Y can thus be located and held at the optimum position where the yarn end Y directly receives the compressed air from the nozzle hole 2.
  • the relatively simple configuration can be used to reliably execute the untwisting process.
  • the untwisting nozzle 1 is also excellent in that the nozzle 1 requires only a minimum increase in costs.
  • the untwisting nozzle 1 is constructed by the unitization of the main body portion 4 and the guide piece 6-the portion 4 and the piece 6 are integrated together with the bolt 5 to constitute a unit part. This allows the untwisting nozzle 1 to be easily and reliably assembled to the yarn splicing device or the like with reduced amounts of time and effort.
  • the untwisting nozzle 1 also makes it possible to eliminate the need for the adjustment of the position of the slit 12 relative to the nozzle hole 2, which need is unavoidable for a form in which the main body portion 4 and the guide piece 6 are separate members.
  • the slit 12 can be disposed at the appropriate position with respect to the nozzle hole 2, the untwisting nozzle 1 is excellent in that it always exhibits stable untwisting performance.
  • the yarn splicing device is applied to a winding unit of a winder or the like.
  • the yarn splicing device comprises a vertical pair of untwisting nozzles 1 (1a, 1b) and a yarn splicing nozzle 21 having a yarn splicing hole 20 in which untwisted yarn ends are entangled and thus spliced with each other under the effect of the whirling current.
  • the yarn splicing nozzle 21 is disposed so that a yarn path in the yarn splicing hole 20 extends in a vertical direction.
  • the untwisting nozzles 1a, 1b are disposed symmetrically with respect to the yarn splicing nozzle 21; the untwisting nozzles 1a, 1b are respectively disposed above and below the yarn splicing nozzle 21.
  • the lower side untwisting nozzle 1b is assembled into the yarn splicing device in a position reverse to that of the upper side untwisting nozzle 1a in the vertical direction.
  • reference numerals 23, 24 are yarn guides.
  • the yarn guides 23, 24 have guide grooves 23a, 23b, 24a, 24b engraved therein to separate a yarn Ya from a yarn Yb.
  • a yarn shifting lever 25 is provided inside the yarn guides 23, 24 to push the yarns Ya, Yb into the yarn guides 23, 24.
  • Cutters 26, 26 are each provided between a corresponding one of the untwisting nozzles 1a, 1b and a corresponding one of the yarn guides 23, 24.
  • Clamp devices 28, 29 are each provided outside a corresponding one of the yarn guides 23, 24.
  • a yarn clearer (not shown in the drawings) cuts each yarn into two yarns, the downstream side yarn Ya and the upstream side yarn Yb, which are gripped by the clamp devices 28, 29, respectively.
  • the yarns Ya, Yb gripped by the clamp devices 28, 29 are guided and inserted into the yarn spicing hole 20 or the like by the yarn shifting lever 25.
  • the downstream side yarn Ya is guided and inserted through the guide groove 23a, along a side surface of the upper side untwisting nozzle 1a, and then through the yarn splicing hole 20 and the pocket 7 in the lower side untwisting nozzle 1b and then into the guide groove 24a.
  • the upstream side yarn Yb is guided and inserted through the guide groove 24b, along a side surface of the lower side untwisting nozzle 1b, and then through the yarn splicing hole 20 and the pocket 7 in the upper side untwisting nozzle 1a and then into the guide groove 23b.
  • the yarns Ya, Yb are guided and inserted into the pockets 7 from the right side opening. Once the above guidance and insertion of the yarns Ya, Yb is finished, the yarns Ya, Yb are cut with the cutters 26, 26. Then, the yarn shifting lever 25 is returned to loosen both yarns Ya, Yb.
  • the compressed air is ejected from the nozzle holes 2 (see Figure 1 and other figures) in the untwisting nozzles 1b, 1a to the yarn ends of the yarns Ya, Yb to untwist the tips of the yarn ends.
  • the details of the untwisting process are as described above.
  • the yarn shifting lever 25 is actuated again to pull the untwisted yarn ends out of the untwisting nozzles 1b, 1a.
  • the yarn ends of both yarns Ya, Yb are allowed to overlap each other in the yarn splicing hole 20 in the yarn splicing nozzle 21.
  • the whirling current is allowed to flow through the yarn splicing hole 20 to entangle the overlapping portions of the two yarn ends into a single yarn.
  • the slit 12 is straight and has the uniform lateral width dimension in the upward-downward direction.
  • the present invention is not limited to this but the slit may be tapered so that the lateral width dimension at the upper end thereof is different from that at the lower end thereof.
  • a very small projection for preventing the yarn end Y from slipping off may be provided on one or both of a right side wall and a left side wall forming the slit 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Looms (AREA)

Claims (3)

  1. Filière de décordage (1) du type à soufflerie d'air, comprenant :
    une partie de corps principale (4) ayant un trou de filière (2) et un canal interne (3) qui est en communication avec le trou de filière (2),
    dans laquelle la filière de décordage (1) décorde une extrémité de fil en éjectant de l'air comprimé du trou de filière (2) à l'extrémité du fil,
    la filière de décordage (1) comprenant en outre une pièce de guidage (6) avec une fente (12) pour contrôler la position de l'extrémité du fil,
    caractérisée en ce que :
    la pièce de guidage (6) est installée d'une seule pièce dans une position en regard du trou de filière (2) dans la partie de corps principale (4) à une distance prédéterminée du trou de filière (2),
    la surface avant de la partie de corps principale (4) comprend une poche (7) qui est ouverte dans la surface supérieure, dans la surface inférieure et dans sa surface de droite pour faire passer l'extrémité du fil à travers la poche (7),
    dans laquelle de l'air est injecté du trou de filière (2) dans la poche (7),
    la fente (12) est formée par encochage de manière à s'étendre vers l'intérieur depuis un bord de la pièce de guidage (6),
    l'extrémité interne (12b) de la fente (12) est formée dans une position en regard du trou de filière (2) en travers de la poche (7),
    la partie de corps principale (4) et la pièce de guidage (6) sont intégrées en une pièce unitaire,
    la surface avant de la partie de corps principale (4) est une surface étagée constituée d'une première surface (9a) sur laquelle la pièce de guidage (6) est installée et d'une seconde surface (9b) formée plus en arrière que la première surface (9a), et
    le trou de filière (2) est formé dans la seconde surface (9b).
  2. Dispositif d'épissage de fil, comprenant une paire verticale de filières de décordage (la, 1b) et une filière d'épissage de fil (21) ayant un trou d'épissage de fil (20) dans lequel des extrémités de fil décordées sont enchevêtrées et donc épissées l'une avec l'autre au moyen d'un courant tourbillonnaire,
    caractérisé en ce que :
    chaque filière est formée selon la filière de décordage (1) de la revendication 1.
  3. Utilisation de la filière de décordage (1) selon la revendication 1, dans un dispositif d'épissage de fil comprenant une paire verticale de filières de décordage (la, 1b), et
    une filière d'épissage de fil (21) ayant un trou d'épissage de fil (20) dans lequel des extrémités de fil décordées sont enchevêtrées et donc épissées l'une avec l'autre sous l'effet d'un courant tourbillonnaire.
EP07111717A 2006-08-28 2007-07-04 Filière de décordage Ceased EP1894873B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006231139A JP2008050158A (ja) 2006-08-28 2006-08-28 解撚ノズル

Publications (2)

Publication Number Publication Date
EP1894873A1 EP1894873A1 (fr) 2008-03-05
EP1894873B1 true EP1894873B1 (fr) 2012-09-05

Family

ID=38819599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111717A Ceased EP1894873B1 (fr) 2006-08-28 2007-07-04 Filière de décordage

Country Status (3)

Country Link
EP (1) EP1894873B1 (fr)
JP (1) JP2008050158A (fr)
CN (1) CN101135077B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094264A (zh) * 2010-12-27 2011-06-15 上海凯利纺织五金有限公司 一种安装于空捻器上的退捻装置
DE102019122056A1 (de) * 2019-08-16 2021-02-18 Saurer Spinning Solutions Gmbh & Co. Kg Spleißprismaeinheit für einen Spleißer einer Textilmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962855A (en) * 1973-12-12 1976-06-15 Fritz Stahlecker Start-spinning apparatus which travels along an open-end spinning machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823725A1 (de) * 1987-07-15 1989-01-26 Mesdan Spa Universalverfahren zum aufdrehen, entwirren und oeffnen eines textilgarns und vorrichtung zur durchfuehrung des verfahrens
JPH059824A (ja) * 1991-07-02 1993-01-19 Murata Mach Ltd スプライサにおける糸端解繊方法
IT1299006B1 (it) * 1998-04-02 2000-02-07 Mesdan Spa Dispositivo per la preparazione dell'estremita' di filo alla giunzione con un apparecchio per la giunzione pneumatica senza nodo di fili e

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962855A (en) * 1973-12-12 1976-06-15 Fritz Stahlecker Start-spinning apparatus which travels along an open-end spinning machine

Also Published As

Publication number Publication date
EP1894873A1 (fr) 2008-03-05
CN101135077A (zh) 2008-03-05
JP2008050158A (ja) 2008-03-06
CN101135077B (zh) 2011-08-03

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