EP0547002A1 - Kontrollverfahren und Vorrichtung zum Entfernen von fehlerhaften Schussfäden in einer schützenlosen Webmaschine - Google Patents

Kontrollverfahren und Vorrichtung zum Entfernen von fehlerhaften Schussfäden in einer schützenlosen Webmaschine Download PDF

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Publication number
EP0547002A1
EP0547002A1 EP92811000A EP92811000A EP0547002A1 EP 0547002 A1 EP0547002 A1 EP 0547002A1 EP 92811000 A EP92811000 A EP 92811000A EP 92811000 A EP92811000 A EP 92811000A EP 0547002 A1 EP0547002 A1 EP 0547002A1
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EP
European Patent Office
Prior art keywords
weft
defective
take
defective weft
cutting
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Withdrawn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
EP92811000A
Other languages
English (en)
French (fr)
Inventor
Takefumi c/o KABUSHIKI KAISHA TOYODA Ogura
Hiroyuko c/o KABUSHIKI KAISHA TOYODA Kanayama
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 EP0547002A1 publication Critical patent/EP0547002A1/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft

Definitions

  • the present invention relates to control method and apparatus for disposing a defective weft failed in weft insertion in a shuttleless loom and, more particularly, to control method and apparatus for cutting the defect weft after controlling the condition of the defective weft held.
  • take-up means W having a conical projection V When take-up means W having a conical projection V is reached by the defective weft Y, it is moved in the direction of arrow to bring its conical projection into abutment against a conical recess V thereby to hold the defective weft Y in a clamped state. After this, the take-up means W rotates to cause the defective weft to be cut in the vicinity of the main nozzle M by a cutter C.
  • the defective weft Y is held by the takeup means W, it is cut as it is by the cutter C.
  • a weft Y1 at the main nozzle side and the defective weft Y2 at the woven fabric side may be entangled as a result of twisting or napping the yarns.
  • the defective weft Y2 at the fabric side is cut to raise a problem that the defective weft Y2 to be intrinsically removed is left in the fabric.
  • a control method for disposing a defective weft in a shuttleless loom comprising: a control step of controlling the condition of the defective weft by rotating said take-up means preliminarily, after the defective weft is held by said
  • a control apparatus for disposing a defective weft in a shuttleless loom comprising: take-up control means for controlling the condition of the defective weft by rotating said take-up means preliminarily, after the
  • the take-up means when the take-up means holds the defective weft, it rotates preliminarily in the direction according to the kinds of yarns to control the condition of the defective weft in advance. Specifically, a proper tension is applied in case the weft at the main nozzle size and the defective weft at the fabric side are entangled, or the defective weft7 is cut after the acting tension is lightened, in case the wefts are elastic yarns.
  • the take-up control means designates a rotating direction by a control signal according to the kinds of yarns to rotationally control the take-up means preliminarily thereby to control the condition of the defective weft preliminarily. Specifically, a proper tension is applied to separate the two in case the weft at the main nozzle size and the defective weft at the fabric side are entangled, or a signal is outputted from the cutting control means so that the defective weft is cut by the cutting means, after the acting tension is lightened, in case the wefts are elastic yarns.
  • control method-thus constructed and operated for disposing a defective weft in a shuttleless loom according to the first invention, it rotates preliminarily in the direction according to the kinds of yarns to control the condition of the defective weft in advance. Specifically, a proper tension is applied in case the weft at the main nozzle size and the defective weft at the fabric side are entangled, or the defective weft is cut after the acting tension is lightened, in case the wefts are elastic yarns. As a result, there can be attained effects of preventing the defective weft at the fabric side from being cut and preventing the weft from coming out of the main nozzle due to the buckling and the reserved yarns to be measured from being disturbed.
  • the control apparatus thus constructed and operated for disposing a defective weft in a shuttleless loom according to the first invention achieves, in addition to the effects similar to those of the aforementioned first embodiment, effects of realizing the aforementioned effects merely by changing the logic of the controller without any change in the mechanism and actuator portion of the defective weft disposing apparatus.
  • a control apparatus for disposing a defective weft in a shuttleless loom according to a first embodiment is realized by applying the present invention to an air jet loom and by controlling take-up control means and cutting control means by means of a computer, as will be described with reference to Figs. 1 to 8.
  • an air jet loom has its slay 1 rocked along the loom.
  • a main nozzle 2 which is composed of six nozzles (although only one Is shown as a representative) for multiple colors.
  • a reed 3 which is formed with recesses which are arrayed in the direction of weft insertion to constitute a weft guiding passage, thus constructing a modified reed.
  • a weft Y supplied from a weft measuring reservoir 4 at the lefthand of the main nozzle 2 is guided to the main nozzle 2 and is inserted in synchronism with the weft inserting timing together with a fluid injected from the main nozzle 2 into the weft guiding passage.
  • a cutter 5 for cutting at each weft insertion the weft Y which is beaten and woven into a fabric and connected to the main nozzle 2 Is arranged below the side closer to the main nozzle and positioned to correspond to the cloth fell.
  • a weft detecting device 6 is arranged upon the opposite end of weft insertion.
  • this weft detecting device 6 detects failure in the weft insertion from the fact that the leading end of the inserted weft fails to reach, an air cylinder 50 communicating with an air tank AT through a solenoid valve 51 is rendered inoperative by closing the 'solenoid valve 51 so that the cutter 5 may be kept Inoperative to hold the state, In which the defective weft Y inserted into the cloth fell of the woven fabric is connected to the main nozzle 2 while being prevented from being cut.
  • a sucking device 7 is constructed to include: a blow nozzle 71 interposed between the main nozzle 2 and the cutter 5 and directed upward of the main nozzle 2; an inverted J-shaped weft guiding duct 72 opened to face the injection port of the blow nozzle 71; an air guide 73 arranged to face the other opening of the weft guiding duct 72; and an inverted J-shaped sucking duct 74 opened to face the air guide 73.
  • the flow nozzle 71 is connected through a solenoid valve 75 to the air tank AT, and the nozzle opened into the sucking duct 74 is also connected through a solenoid valve 76 to the air tank AT.
  • a take-up device 8 is constructed of a nip roller, in which a drive roller 81 and a pressure roller 82 are arranged to face each other between the weft guiding duct 72 and the air guide 73.
  • the drive roller 81 is driven by a drive motor 80 which is controlled by a controller 10, and the pressure roller 82 is moved vertically of Fig.. I by an air cylinder 83, which is connected to the air tank AT through a solenoid valve 84, to take an operative position, in which it is forced to contact with the drive roller 81, and a retracted position, in which it Is spaced from the drive roller 81.
  • a defective weft detecting device 16 for outputting a signal if a defective weft Y1 is sucked to the sucking duct 74.
  • a cutter 9 which is composed of cutting blades 91 and 92.
  • the defective weft Y1 guided into the weft guiding duct 72 is cut by the cutting blades 91 and 92 before it is taken up by the actions of the two rollers 81 and 82 of the take-up device 8.
  • the slay 1 is equipped through a cutter holder 93 with a bracket 94, by which are retained the two cutting blades 91 and 92.
  • the cutting blade 91 is a stationary blade whereas the cutting blade 92 is a movable blade.
  • the controller 10 is constructed, as indicated by two blocks 10A and 10B connected with each other in 13 Fig. 1, of a control computer such as a personal computer which includes: input/output means (I/0) 11 connected with the weft detecting device 6, the defective weft detecting device 16, the solenoid valves 51, 75, 76, 84 and 96 and the drive motor 80; a CPU 12; a ROM 13 stored In advance with a later-described weft disposing program and a control program for controlling the condition of the defective weft; a RAM 14; a keyboard 15 for inputting in advance the kinds of multicolor yarns to be guided into the main nozzle 2 and the nozzle numbers; and a display 17 for displaying the control states and the results.
  • a control computer such as a personal computer which includes: input/output means (I/0) 11 connected with the weft detecting device 6, the defective weft detecting device 16, the solenoid valves 51, 75, 76, 84 and 96 and the drive motor
  • the ROM 13 in the controller 10 is stored in advance with the weft disposing program and the control program for controlling the condition of the defective weft, as shown in Fig. 4.
  • the ROM 13 is also stored in advance with the optimum values of the direction, angle and speed of the previous rotations, which have been experimentally determined in advance, for controlling the condition, position and tension of the defective weft according to the kinds and characteristics of the yarns.
  • the operations of the apparatus thus constructed according to the first embodiment will be described with reference to the flow chart of Fig. 4. If, during the weft insertion, the leading end Yb of the weft is looped, for example, to fail to reach the position of the weft detecting device 6, as shown in Fig. 6, the weft detecting device 6 inputs the weft insertion failure signal through the input/output means 11 to the control computer 10.
  • the loom rotates as it is and stops at a crank angle of 300 degrees. After this, the loom reverses and stops at a crank angle of 180 degrees to open the opening.
  • the signal is inputted from the controller 10 to the valve 51 so that the valve 51 stops the supply of compressed air to the air cylinder 50 thereby to render the cutter 5 inoperative.
  • the signal is inputted from the controller 10 to the valves 75 and 76 so that these valves 75 and 76 feed the compressed air to the blow nozzle 71 and the suction duct 74.
  • the flow nozzle 71 injects to establish a suction flow not only in the weft guiding duct 72 and but also in the suction duct 74 connected through the air guide 73, thereby to suck the defective weft Y1 having failed in the weft insertion.
  • the compressed air Is supplied through the solenoid valve 84 to the air cylinder 83 so that pressure roller 82 is moved downward of Fig. 1 to push the drive roller 81 through the sucked defective weft Y1.
  • the drive signal Is also outputted from the controller 10 to the drive motor 80 so that the defective weft Y1 is wound leftward of Fig. 1.
  • the defective weft detecting device 16 arranged between the air guide 73 and the opening of the sucking duct 74 detects the defective weft Y1, it outputs its signal to the controller 10.
  • the controller 10 decides the kind and characteristics of the weft inserted from the order of the multi-color nozzles 2, which are Inputted in advance by the keyboard 15, from the injection signal or the like of the main nozzle; extracts the optimum rotation, angle and speed of the previous rotation according to the decision from the main in the ROM 13; and outputs the previous rotation signal to the drive motor 80.
  • the nip roller 8 Is caused to rotate preliminarily in accordance with the kind and characteristic of the yarns, i.e., in the (forward) direction to apply a proper tension to the entanglable yarns such the hard twist yarns, the highly napped yarns or the yarns having long fluffs, and reverses (i.e., in the backward direction) to release the buckling thereby to damp the acting tension for the highly elastic yarns such as the' stretch yarns or the core yarns, thereby to effect the control within the optimum angular range and to the optimum speed.
  • the solenoid valve 96 is opened in response to the signal coming from the controller 10 to supply the compressed air to the air cylinder 95 so that the cutting blade 92 acting as the movable blade is turned to cut the defective weft Y1 in the vicinity of the injection port of the main nozzle 2.
  • the drive motor 80 is driven so that the defective weft Yb woven is wound by the nip roller 8 and removed through the sucking duct 74. Then the loom is restarted after disposal of the weft having failed in the weft insertion.
  • the apparatus thus constructed and operated according to the first embodiment is based upon the data of the ROM 13 to preliminarily rotate the nip roller 8 quickly forward to 20 degrees (i.e., at the optimum speed and to the optimum angle) so that the two wefts are released from their entangled state into the state shown in Fig. I by applying a proper tension to the defective weft Y1 and the weft retained by the main nozzle 2. Then, only the weft retained by the main nozzle 2 is cut to raise an effect that the woven defective weft Yb to be removed can be prevented from being cut.
  • the apparatus of the first embodiment is based upon the data of the ROM 13 to preliminarily reverse the nip roller 8 slowly to 40 degrees at the optimum speed and at the optimum angle thereby to sufficiently release the tension acting upon the defective weft. After this, the weft is cut by the cutter 9 to raise an effect of preventing the weft from coming out of the main nozzle 2 and the reserved weft to be measured from being disturbed.
  • the conditions (i.e., the direction. angle and speed of the rotation) of each weft inputted in response to the injection signal of the nozzle are determined on the basis of the optimum data stored in advance in the ROM 13 and determined by the experiments if the kinds of the yarns to be fed from the main nozzle 2 from the six multi-color nozzles are inputted In advance from the keyboard 15.
  • the conditions i.e., the direction. angle and speed of the rotation
  • the control system is constructed of a personal computer so that the control contents can be determined according to the control program.
  • the control system can be easily modified, if necessary, and made flexible.
  • the control system is enabled to softly cope with even the new weft by inputting the various data of the new weft to the ROM 13 to realize a composite preliminary rotation.
  • the foregoing embodiment is exemplified by opening and closing the valve 51 and the valves 75 and 76 after the loom stops and reverses.
  • the above-specified valves may be opened and closed simultaneously with or prior to the stop and reverse of the loom.
  • the foregoing embodiment is exemplified by constructing the control apparatus of the personal computer but can be modified by constructing the control apparatus of a hardware having similar functions.
  • the foregoing embodiment is exemplified by the multi-color loom, but the present invention can naturally be applied to a monochromatic loom having only one main nozzle.
  • the present invention can naturally adopt an embodiment. in which the state of a defective weft is controlled by likewise controlling the preliminary rotation in accordance with the kind and characteristic of the weft to be inserted by that single main nozzle.
  • a blow nozzle 71 injects compressed air into a weft guiding duct 72, and guides the defective weft into the duct. Then a nip roller 8 holds the defective, and a cutter 9 cuts the weft.
  • the nip roller 8 pulls out and removes the weft. After the nip roller 8 holds the defective weft, it rotates round preliminarily in the direction according to the kinds of yarns, and controls the condition of the defective weft. Then the cutter 9 cuts the controlled weft.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP92811000A 1991-12-12 1992-12-14 Kontrollverfahren und Vorrichtung zum Entfernen von fehlerhaften Schussfäden in einer schützenlosen Webmaschine Withdrawn EP0547002A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP351440/91 1991-12-12
JP03351440A JP3079723B2 (ja) 1991-12-12 1991-12-12 無杼織機における不良緯糸処理方法の制御方法および不良緯糸処理装置の制御装置

Publications (1)

Publication Number Publication Date
EP0547002A1 true EP0547002A1 (de) 1993-06-16

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EP92811000A Withdrawn EP0547002A1 (de) 1991-12-12 1992-12-14 Kontrollverfahren und Vorrichtung zum Entfernen von fehlerhaften Schussfäden in einer schützenlosen Webmaschine

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EP (1) EP0547002A1 (de)
JP (1) JP3079723B2 (de)
CN (1) CN1073223A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107488936A (zh) * 2017-09-29 2017-12-19 安平县金路丝网机械有限公司 全自动液压编织机及编织方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108893842B (zh) * 2018-09-17 2023-06-16 太平洋纺织机械（常熟）有限公司 剑杆织机的气动折入边装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200168A2 (de) * 1985-04-24 1986-11-05 Tsudakoma Corporation Vorrichtung zum Entfernen von Fehlerschuss in schützenlosen Webmaschinen
US4749006A (en) * 1984-07-26 1988-06-07 Tsudakoma Kogyo Kabushiki Kaisha Automatic method and apparatus for removing a faulty weft on a loom
US4890650A (en) * 1987-08-25 1990-01-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Detecting and removing faulty weft in a jet loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749006A (en) * 1984-07-26 1988-06-07 Tsudakoma Kogyo Kabushiki Kaisha Automatic method and apparatus for removing a faulty weft on a loom
EP0200168A2 (de) * 1985-04-24 1986-11-05 Tsudakoma Corporation Vorrichtung zum Entfernen von Fehlerschuss in schützenlosen Webmaschinen
US4890650A (en) * 1987-08-25 1990-01-02 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Detecting and removing faulty weft in a jet loom

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Section Ch, Week 8738, 12 August 1987 Derwent Publications Ltd., London, GB; Class F02, AN A05 & JP-A-62 184 146 (TSUDAKOMA) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107488936A (zh) * 2017-09-29 2017-12-19 安平县金路丝网机械有限公司 全自动液压编织机及编织方法
CN107488936B (zh) * 2017-09-29 2022-12-23 安平县金路丝网机械有限公司 全自动液压编织机及编织方法

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Publication number Publication date
JP3079723B2 (ja) 2000-08-21
CN1073223A (zh) 1993-06-16
JPH05163639A (ja) 1993-06-29

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