EP0493859A1 - Dispositif pour retirer les fils de trame défectueux dans un métier à tisser à jet - Google Patents

Dispositif pour retirer les fils de trame défectueux dans un métier à tisser à jet Download PDF

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Publication number
EP0493859A1
EP0493859A1 EP91203418A EP91203418A EP0493859A1 EP 0493859 A1 EP0493859 A1 EP 0493859A1 EP 91203418 A EP91203418 A EP 91203418A EP 91203418 A EP91203418 A EP 91203418A EP 0493859 A1 EP0493859 A1 EP 0493859A1
Authority
EP
European Patent Office
Prior art keywords
weft
friction belt
leading end
package
yarn
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Withdrawn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
EP91203418A
Other languages
German (de)
English (en)
Inventor
Masahiko C/O Kabushiki Kaisha Toyoda Murata
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
Application filed by Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyoda Jidoshokki Seisakusho KK
Publication of EP0493859A1 publication Critical patent/EP0493859A1/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Withdrawn legal-status Critical Current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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/003—Arrangements for threading or unthreading the guide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • 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 a yarn transfer device for transferring a yarn from a yarn package to another device when the yarn being fed from a feed package to a take up device is broken between the feed package and the take up device or when an exhausted feed package is changed for a full feed package.
  • the invention ralates to a weft transfer device for transferring a weft from a weft package to a weft measuring/storing device when a weft being fed from a feed package to the weft measuring/storing device is broken between the feed package and the weft measuring/storing device or when an exhausted feed package is changed for a full feed package.
  • Weft transfer devices for such a purpose are disclosed in Japanese Patent Laid-open (Kokai) Nos. Sho 63-264949 and Hei 1-92452 and Japanese Utility Model Laid-open No. Hei 1-62375. These prior art weft transfer devices pull out the leading end of the weft of a feed package by suction and transport the leading end of the weft to a weft measuring/storing device of a winding drum type.
  • leading end of the weft of a weft package is in close adhesion to the circumference of the weft package, and the area of the leading end subjected to suction is very small. Therefore, it is difficult to separate the leading end of the weft from the circumference of the weft package only by suction, and hence the reliability of the prior art weft transfer devices in feeding the leading end of the weft 3 to the weft measuring/storing device is not satisfactory.
  • the present invention provides a weft transfer device comprising a friction belt with a fuzzy working surface, capable of being located alternately at a weft separating position where a portion of the fuzzy working surface of the friction belt is in contact with the circumference of the weft package and at a standby position where t e fuzzy working surface of the friction belt is separated from the circumference of the weft package.
  • the friction belt is held at the standby position, and the friction belt is shifted to the weft separating position when the weft being fed is broken between the weft package and the weft measuring/storing device or when an exhausted weft package is changed for a full weft package.
  • the friction belt After being set at the weft separating position, the friction belt is turned to rub the circumference of the weft package with the fuzzy working surface. Consequently, the leading end of the weft adhering to the circumference of the weft package is separated from the circumference by the rubbing action of the fuzzy working surface of the friction belt, and then the leading end of the weft is transported to the inlet of the weft measuring/storing device as the friction belt is turned.
  • a yarn transfer device in a preferred embodiment as a weft transfer device according to the present invention will be described hereinafter with reference to Figs. 1 to 12.
  • a weft package holding peg 1 supported for rotation has a base end operatively connected through a gearing to a motor 2 for rotating the weft package holding peg 1 in an unwinding d rection to unwind the weft of a weft package 3 held on the weft package holding peg 1.
  • a motor 5 mounted on a fixed base 4 has a driving screw shaft 5a and a guide rod 6 extends from the fixed base 4.
  • a support plate 7 is suspended on the driving screw shaft Sa and the guide rod 6.
  • the driving screw shaft 4a rotates to move the support frame 7 radially of the weft package 3.
  • a motor 8, a driving pulley 9 and a guide pulley 10 are attached to the side surface of the support plate 7.
  • the driving pulley 9 is operatively connected to the moto 8.
  • An friction belt 11 with a fuzzy working surface coated with fuzz 11a is extended between the driving pulley 9 and the guide pulley 10.
  • the friction belt 11 is set so that the fuzzy working surface move along a path parallel to the circumference of the weft package 3, and the guide pulley 10 is disposed near the inlet 12a of a weft measuring/storing device 12.
  • a weft package detector 13 is attached to the support plate 7 to detect the circumference of the weft package 3 when the support plate 7 is advanced toward the weft package 3.
  • the yarn winding pipe 12b of the weft measuring/storing device 12 is driven for revolution by a motor M separate from the main motor, not shown, of the loom.
  • the weft is wound on the yarn storage surface 12c of the storage drum of the weft measuring/storing device 12.
  • a stop pin 14a is advanced to or retracted from the yarn storage surface 12c by a solenoid actuator 14 to allow or to inhibit the unwinding of the weft wound on the yarn storage surface 12c.
  • a yarn breakage detector 1S and a blow nozzle 16 are disposed near an inlet opening 12a.
  • the blow nozzle 6 is connected through a two-way solenoid valve V1 to a compressed air tank, not shown.
  • the air jetting out from the yarn winding pipe 12b is converged by a convergent guide member 18 and flows in a stream toward a threading device 19 disposed between the weft measuring/storing device 12 and a main picking nozzle 17.
  • the threading device is such as disclosed in Japanese Patent Laid-open No. Hei 2-251637.
  • This threading device 19 holds the leading end of the weft jetted out from the convergent guide member18 by an air current, cuts the leading end of the weft in an appropriate length and inserts the leading end of the weft in the main picking nozzle 17.
  • a picking obstructing blow nozzle 20 is disposed directly below the main picking nozzle 17, and a faulty weft removing device 21 is disposed directly above the main picking nozzle 17.
  • the faulty weft removing device 21 is of the same system as that of a faulty weft removing device disclosed in Japanese Patent Laid-open (Kokai) No. Hei 2-251637.
  • When picking failure occurs air is blown from the blow nozzle 20 to obstruct the insertion of the weft continuous with a faultily inserted weft, and then the faulty weft removing device 21 pulls the weft to extract the faultily inserted weft from the cloth fell.
  • the faulty weft removing device 21 is provided internally with a weft detector 22, and the operation of the faulty weft removing device 21 is controlled according to the output signal of 7 the weft detector 22.
  • the main picking nozzle 17 and the blow nozzle 20 are connected respectively through two-way solenoid valves V2 and V3 to the compressed air tank.
  • the solenoid valves V1 to V3, the motors 5, 8 and M, the solenoid actuator 14, the threading device 19 and the faulty weft removing device 21 are controlled by a control computer C separate from a loom control computer for controlling the jet loom.
  • the control computer C controls the solenoid valves V1 to V3, the solenoid actuator 14 and the motors 5, 8 and M according to the output detection signals of the weft package detector 13, the yarn breakage detector 15 and the weft detector 22.
  • Figs. 6 to 12 are flow charts of weft transfer procedures to be executed by the control computer C when the weft is broken between the weft package 3 and the weft measuring/storing device 12.
  • Fig. 1 shows a threading path along which a weft Y is fed during weaving operation.
  • the yarn breakage detector 15 gives a weft breakage signal to the control computer C.
  • the control computer C gives a loom stop signal to the loom control computer.
  • the main picking nozzle 17 mounted on the sley of the loom is stopped near the cloth fell of the fabric on the loom.
  • the loom control computer provides a command to reverse the loom at a low speed by a predetermined angle to shift the main picking nozzle 17 to and locate the same at a threading position.
  • the solenoid actuator 14 is actuated and the solenoid valves V2 and V3 are opened to retract the stop pin 14a from the yarn storage surface 12c and to blow air from the main picking nozzle 17 and the blow nozzle 20.
  • the residual weft remaining on the yarn storage surface 12c and released from the stop pin 14a is jetted out through the main picking nozzle 17 and is blown by the air blown from the blow nozzle 20 into the faulty weft removing device 11.
  • the weft detector 22 detects the residual weft transferred to the faul y weft removing device 21 and provides a weft detection signal. When, the faulty weft removing device 21 starts its faulty weft removing operation.
  • the faulty weft removing device 21 Upon the confirmation of the completion of the faulty weft removing operation from the termination of the weft detection signal provided by the weft detector 22, the faulty weft removing device 21 is restored to its initial state.
  • the faulty weft removing operation of the faulty weft removing device 21 for removing the residual weft must be completed prior to threading the weft from the weft measuring/storing device 12 to the main picking nozzle 17.
  • the motor 5 is driven for rotation in the normal direction to advance the support plate 7 toward the circumference of the weft package.
  • the motor 5 is stopped. In this state, the fuzzy working surface coated with the fuzz 11a of the friction belt 11 extends along the circumference of the weft package 3.
  • the solenoid valve V1 is opened to blow air from the blow nozzle 16, so that a suction air current is produced in the inlet opening 12a of the weft measuring/storing device 12.
  • the motors 2 and 8 are actuated to rotate the weft package 3 and to turn the friction belt 11.
  • the circumference of the rotating weft package 3 is rubbed with the fuzz 11a of the friction belt 11, so that the leading end of the weft of the weft package 3 is caught by the fuzz 11a and is separated from the circumference of the weft package 3.
  • the positive separation of the leading end of the weft of the weft package 3 by the rubbing action of the fuzz 11a is far more reliable than the separation of the same by suction.
  • the separation of the leading end Y1 sticking to the circumference of the weft package by suction is scarcely possible. even if the leading end Y1 is sticking to the circumference of the weft package, the leading end Y1 can be caught by the fuzz 11a by the rubbing action of the same. Once the leading end Y1 is caught by the fuzz 11a, the leading end Y1 sticks to the fuzz 11a and the weft can smoothly be pulled out from the weft package as the friction belt is turned.
  • the rubbing action of the friction belt 11 enables successful leading end separation at a high success probability.
  • the leading end Y1 separated from the weft package 3 sticks to the fuzz 11a of the friction belt 11 and is transported toward the inlet opening 12a of the weft measuring/storing device 12. Since the degree of freedom of arrangement of the friction belt 11 is high, a compact transportation path that may not interfere with the devices arranged near the friction belt 11 can be formed. Since the leading end of the weft is securely caught by the fuzz 11a during transportation, this leading end transporting mechanism employing the fuzz 11a is simple as compared with a leading end transporting mechanism employing air currents in transporting the leading end.
  • the leading end Y1 transported near to the inlet opening 12a is transferred from the friction belt 11 to the inlet opening 12a by the suction current prevailing around the inlet opening 12a, and then the leading end Y1 is blown into the yarn winding pipe 12b.
  • the yarn breakage detector 15 Upon the entrance of the leading end Y1 into the inlet opening 12a, the yarn breakage detector 15 provides a yarn detection signal. then, the motors 2 and 8 are stopped to stop the rotating weft package 3 and to stop the turning friction belt 11, and the motor 5 is reversed to retract the support plate 7 to its standby position shown in Fig. 1.
  • the solenoid valves V2 and V3 are opened to jet air from the main picking nozzle 17 and the blow nozzle 20. then, the threading device 19 is actuated to insert the leading end Y1 blown out from the yarn winding pipe 12b is inserted in the main picking nozzle 17.
  • the motor M revolves the yarn winding pipe 12b by a predetermined number of tu ns to reserve a predetermined length of weft on the yarn storage surface 12c, and the weft wound on the yarn storage surface 12c is transferred to the faulty weft removing device 21 by the picking obstructing action of the air blown from the blow nozzle 21.
  • the predetermined length of weft is wound on the yarn storage surface 12c during the operation of the threading device 19 to enable the leading end Y1 to reach the faulty weft removing device 21.
  • the weft detector 22 Upon the arrival of the leading end Y1 at a position corresponding to the weft detector 22 of the faulty weft removing device 21 as shown in Fig. 4, the weft detector 22 provides a weft detection signal, and then a predetermined length of weft is wound on the yarn storage surface 12c for the subsequent picking operation. Subsequently, the leading end Y1 is cut off with a fixed cutting blade 24 provided at the tip of the main picking nozzle 17 to complete the threading operation. If the threading operation for threading the weft through the main picking nozzle 17 is unsuccessful, the threading device 19 is restored to its initial state and the alarm device 23 is actuated.
  • the present invention is not limited in its practical application to the foregoing embodiment.
  • the present invention may be embodied in a weft transfer device as shown in Figs. 13 and 14.
  • the weft transfer device is provided with a pair of guide pulleys 26 and 27 guiding a friction belt 25 with a fuzzy working surface.
  • a blow nozzle 28 is disposed between the guide pulleys 26 and 27 so as to blow air through the friction belt 25 into the inlet opening 12a of a weft measuring/storing device 21.
  • the friction belt 25 has a netlike construction to enable the air blown from the blow nozzle 28 to flow through the friction belt 25 into the inlet opening 12a.
  • the component threads 25a of the friction belt 25 are coated with fuzz 25b.
  • a leading end Y1 transported to a position between the guide pulleys 26 and 27 is inserted positively into the inlet opening 12a by the blowing action of the blow nozzle 28.
  • the leading end of the weft of a weft package is separated from the circumference of the weft package by the fuzzy working surface of the friction belt. Accordingly, the leading end which is difficult to be separated from the circumference of the weft package by suction can be separated from the circumference of the weft package at a high success probability, the reliability of threading operation for threading the leading end through the faulty weft removing device is improved, and the weft transfer device can be formed in a simple construction.
  • the present invention provides a weft transfer device having a simple construction capable of surely pulling out the leading end of the weft of a weft package 3 and of surely threading the leading end through a weft measuring/storing device 12 of a storage drum type when a weft being fed is broken between the weft package 3 and the weft measuring/storing device 12.
  • a friction belt 11 with a fuzzy working surface for separating the leading end of the weft of the weft package 3 and for transferring the leading end to the inlet opening 12a of the weft measuring/storing device is shifted between a standby position and an operating position.
  • a motor 5 is driven for rotation in the normal direction and in the reverse direction to shift the friction belt 11 between the standby position and the operating position.
  • the friction belt 11 is turned by a motor 8.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP91203418A 1990-12-28 1991-12-28 Dispositif pour retirer les fils de trame défectueux dans un métier à tisser à jet Withdrawn EP0493859A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP41735290A JPH04241136A (ja) 1990-12-28 1990-12-28 ジェットルームにおける給糸処理装置
JP417352/90 1990-12-28

Publications (1)

Publication Number Publication Date
EP0493859A1 true EP0493859A1 (fr) 1992-07-08

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ID=18525472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91203418A Withdrawn EP0493859A1 (fr) 1990-12-28 1991-12-28 Dispositif pour retirer les fils de trame défectueux dans un métier à tisser à jet

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EP (1) EP0493859A1 (fr)
JP (1) JPH04241136A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018100464A1 (fr) * 2016-11-30 2018-06-07 Maschinenfabrik Rieter Ag Procédé de détection de l'extrémité d'un fil sur une bobine dans une machine textile produisant ou traitant un fil et dispositif pour la mise en œuvre du procédé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5471923B2 (ja) 2010-07-15 2014-04-16 村田機械株式会社 糸巻取装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784191A (en) * 1984-12-22 1988-11-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for storing a weft yarn for inserting in a jet loom
EP0306079A1 (fr) * 1987-09-02 1989-03-08 Picanol N.V. Procédé pour réparer un fil de trame aux métiers à tisser
EP0365472A1 (fr) * 1988-10-19 1990-04-25 GebràœDer Sulzer Aktiengesellschaft Dispositif pour enfiler un fil dans un métier à tisser
EP0388680A2 (fr) * 1989-03-03 1990-09-26 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Appareil pour introduire la trame dans un métier à tisser pneumatique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784191A (en) * 1984-12-22 1988-11-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Device for storing a weft yarn for inserting in a jet loom
EP0306079A1 (fr) * 1987-09-02 1989-03-08 Picanol N.V. Procédé pour réparer un fil de trame aux métiers à tisser
EP0365472A1 (fr) * 1988-10-19 1990-04-25 GebràœDer Sulzer Aktiengesellschaft Dispositif pour enfiler un fil dans un métier à tisser
EP0388680A2 (fr) * 1989-03-03 1990-09-26 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Appareil pour introduire la trame dans un métier à tisser pneumatique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018100464A1 (fr) * 2016-11-30 2018-06-07 Maschinenfabrik Rieter Ag Procédé de détection de l'extrémité d'un fil sur une bobine dans une machine textile produisant ou traitant un fil et dispositif pour la mise en œuvre du procédé
CN110023219A (zh) * 2016-11-30 2019-07-16 里特机械公司 在制造或处理纱线的纺织机中检测筒管上的纱线端部的方法及执行该方法的装置
CN110023219B (zh) * 2016-11-30 2021-06-15 里特机械公司 在纺织机中检测旋转的筒管上的纱线端部的方法及装置

Also Published As

Publication number Publication date
JPH04241136A (ja) 1992-08-28

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