EP3165646B1 - Weft measurement device for loom - Google Patents

Weft measurement device for loom Download PDF

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Publication number
EP3165646B1
EP3165646B1 EP16196393.9A EP16196393A EP3165646B1 EP 3165646 B1 EP3165646 B1 EP 3165646B1 EP 16196393 A EP16196393 A EP 16196393A EP 3165646 B1 EP3165646 B1 EP 3165646B1
Authority
EP
European Patent Office
Prior art keywords
weft
yarn
measurement
weft yarn
measurement position
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.)
Not-in-force
Application number
EP16196393.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3165646A2 (en
EP3165646A3 (en
Inventor
Masataka Hamaguchi
Takahiro Inamura
Carsten Meder
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.)
Uster Technologies AG
Toyota Industries Corp
Original Assignee
Uster Technologies AG
Toyota Industries Corp
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 Uster Technologies AG, Toyota Industries Corp filed Critical Uster Technologies AG
Publication of EP3165646A2 publication Critical patent/EP3165646A2/en
Publication of EP3165646A3 publication Critical patent/EP3165646A3/en
Application granted granted Critical
Publication of EP3165646B1 publication Critical patent/EP3165646B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • D03D47/36—Measuring and cutting the weft
    • D03D2700/1459—

Definitions

  • the present invention relates to a weft measurement device for a loom that measures a parameter of a weft yarn fed to a loom for weft insertion.
  • a weft yarn is fed from a yarn feeding unit to a weft inserting nozzle.
  • parameters of the weft yarn such as the thickness or mass, change in long cycles.
  • the yarn sensor includes a measurement region formed by a measurement slot that allows for the passage of a weft yarn.
  • the measurement slot opens at the upper side.
  • a support including a weft yarn guide is arranged on each of the two sides of the measurement slot in the direction the weft yarn travels.
  • the weft yarn is held by the guides when passing through the measurement slot.
  • the support of the guides is coupled to a moving means, which includes an air cylinder, and moved in the vertical direction when the air cylinder is actuated.
  • the guides are located at a lowered position to guide the weft yarn so that the weft yarn passes through the measurement slot of the yarn sensor.
  • the yarn sensor measures the parameters of the weft yarn.
  • the support moves the guides toward the upper side.
  • the weft yarn is separated from the measurement slot and passes a region located above the measurement slot.
  • the yarn sensor performs a measurement without the weft yarn. This zero-balances the sensor.
  • the zero balancing refers to a task in which a reference level for measuring the parameters of the weft yarn is reset.
  • the zero balancing will hereinafter be referred to as the "reference level setting task.”
  • the weft yarn is lifted above the measurement slot by the guides when the reference level setting task is performed.
  • the weft yarn is loose, the weft yarn between the two guides droops into the measurement slot.
  • the drooping weft yarn may be measured by the yarn sensor.
  • the reference level setting task is hindered.
  • the measured data of the parameters of the weft yarn may include an error. This may result in the execution of inaccurate weft insertion control.
  • Said vertical plane is preferably defined by a longitudinal axis of the weft yarn in the measurement position and by a depth direction of a measurement slot included in the weft measuring portion.
  • FIG. 1 shows the upper side as viewed in Fig. 1 .
  • a weft yarn travels toward a downstream side from an upstream side.
  • Fig. 1 shows the structure related to weft insertion of the air-jet loom 1.
  • a yarn feeding unit 2 is arranged on a bracket (not shown) fixed to a frame (not shown) or a floor surface (not shown) beside the air-jet loom 1.
  • a weft tensioner 3, a weft measurement device 4, a weft length measuring and storing device 5, and a tandem nozzle 6 are sequentially arranged toward the downstream side of a weft yarn Y that is drawn from the yarn feeding unit 2.
  • a weft inserting nozzle 8, a modified reed 10, which includes a weft guiding passage 9, and auxiliary nozzles 11 are arranged on a sley 7 at the downstream side of the tandem nozzle 6.
  • the yarn feeding unit 2 includes a weft bobbin around which the weft yarn Y is wound.
  • the weft tensioner 3 includes two leaf springs located at opposite sides of the weft yarn Y. The weft yarn Y is held between the leaf springs by the pressure of the leaf springs. This applies tension to the weft yarn Y that is drawn toward the weft length measuring and storing device 5.
  • the weft length measuring and storing device 5 includes a rotary yarn guide 13, a weft locking pin 14, and a balloon sensor 15.
  • the yarn guide 13 is configured to wind the weft yarn Y, which is drawn via the weft measurement device 4 (described below), around a still storage drum 12.
  • the weft locking pin 14 is configured to lock the weft yarn Y wound around the storage drum 12.
  • the balloon sensor 15 is configured to detect the amount of the weft yarn Y drawn out of the storage drum 12.
  • the weft locking pin 14 includes a drive unit formed by a solenoid.
  • the solenoid When the solenoid is activated, the weft locking pin 14 is projected toward the storage drum 12 to lock the weft yarn Y.
  • the solenoid When the solenoid is deactivated, the weft locking pin 14 is separated from the storage drum 12 to release the weft yarn Y.
  • the balloon sensor 15 is formed by a photoelectric sensor. The balloon sensor 15 counts the ballooning frequency of the weft yarn Y drawn by the tandem nozzle 6 and the weft inserting nozzle 8 during weft insertion.
  • the solenoid of the weft locking pin 14 is activated by an instruction signal from a controller 24 (described below). This locks the weft yarn Y.
  • the tandem nozzle 6 and the weft inserting nozzle 8 are configured to eject compressed air in order to draw the weft yarn Y from the storage drum 12 and insert the drawn weft yarn Y into the weft guiding passage 9 of the modified reed 10, which is located in a warp shed (not shown).
  • the auxiliary nozzles 11 are configured to eject compressed air that carries the inserted weft yarn Y along the weft guiding passage 9.
  • a tandem air valve 16 connected to the tandem nozzle 6 and a main air valve 17 connected to the weft inserting nozzle 8 are connected to a common main air tank 18.
  • the main air tank 18 is connected to a compressed air source (not shown) such as a compressor via a main regulator 19 by a pipe 20.
  • the auxiliary nozzles 11 are connected to one of a group of auxiliary air valves 21.
  • the auxiliary air valve 21 is connected to the pipe 20 via an auxiliary air tank 22 and an auxiliary regulator 23.
  • the weft locking pin 14 and the balloon sensor 15 of the weft length measuring and storing device 5 are electrically connected to the controller 24 by wires 25, 26, 27, 28, and 29, respectively.
  • the controller 24 issues an instruction signal that opens the tandem air valve 16 and the main air valve 17 to eject compressed air from the tandem nozzle 6 and the weft inserting nozzle 8.
  • weft locking pin 14 is operated to release the weft yarn Y
  • weft insertion is started.
  • the auxiliary air valve 21 opens and the auxiliary nozzles 11 eject compressed air.
  • the weft yarn Y is fed through the weft guiding passage 9 by the compressed air ejected from the auxiliary nozzles 11.
  • the controller 24 issues an instruction to close the tandem air valve 16 and the main air valve 17 and stop ejecting compressed air from the tandem nozzle 6 and the weft inserting nozzle 8.
  • the balloon sensor 15 counts the ballooning frequency of the weft yarn Y drawn from the storage drum 12.
  • the controller 24 issues an instruction to actuate the weft locking pin 14 so that the weft locking pin 14 locks the weft yarn Y and terminates weft insertion.
  • the controller 24 issues an instruction to close the auxiliary air valve 21 and stop ejecting compressed air from the auxiliary nozzles 11.
  • the weft measurement device 4 is located between the weft tensioner 3 and the weft length measuring and storing device 5. As shown in Figs. 2 and 3 , the weft measurement device 4 includes a weft sensor 30 and a weft guide unit 31.
  • the weft sensor 30 includes a housing 32. One side of the housing 32 is cut in a U-shaped manner to form a weft measuring portion 34 including a measurement slot 33.
  • the measurement slot 33 extends in the vertical direction toward the upper side of the air-jet loom 1 and opens toward the outside. This allows the weft yarn Y to be inserted into the measurement slot 33 from the upper side.
  • a photoelectric sensor, a capacitive sensor and/or any other sensor are incorporated in the housing 32 to form the weft sensor 30.
  • the weft sensor 30 is electrically connected to the controller 24 by a wire 35.
  • the weft sensor 30 measures one or more parameters of the weft yarn Y inserted into the measurement slot 33 of the weft measuring portion 34, such as the thickness, mass, density, hairiness, and foreign matter. Then, the weft sensor 30 transmits the measured parameters to the controller 24.
  • the weft guide unit 31 includes weft guides 36 and 37 located at the two ends with respect to the travel direction of the weft yarn Y.
  • the weft measuring portion 34 is located between the weft guides 36 and 37.
  • the weft guide unit 31 also includes a moving means 38 for the weft guides 36 and 37 and a stopper 39 that restricts movement of the weft guides 36 and 37.
  • the weft guide 36 is supported by a support arm 41 (refer to Fig. 3 ) and includes a U-shaped holding groove 40, which opens toward the upper side.
  • the weft guide 37 is shaped in the same manner as the weft guide 36 and includes a U-shaped holding groove 42 and a support arm 43.
  • the moving means 38 includes a body 44 incorporating a rotary solenoid and is electrically connected to the controller 24 by a wire 45.
  • the body 44 is fixed to a bracket 47 that is fastened to the housing 32 of the weft sensor 30 by bolts 46 (refer to Fig. 3 ).
  • the basal ends of the support arms 41 and 43 of the weft guide unit 31 are fixed to the two ends of a rotation shaft 48, which project from the two opposite sides of the rotary solenoid.
  • the measurement position is set at a position that allows the weft sensor 30 to measure the parameters of the weft yarn Y in the measurement slot 33 of the weft measuring portion 34. Further, the measurement position is set on a vertical plane A in the measurement slot 33. The non-measurement position is set at a position separated from the vertical plane A that includes the measurement position. It is preferred that the arcuate movement path between the measurement position and the non-measurement position be set to minimize contact of the weft yarn Y with the wall surface of the measurement slot 33.
  • the stopper 39 is cylindrical and includes an outer circumferential surface around which an elastic member 49 is wound.
  • the stopper 39 is fixed to the bracket 47 to project toward the support arm 41 of the weft guide unit 31. As shown in Fig. 3 , the stopper 39 restricts rotation of the weft guide 36 toward the lower side from the measurement position shown by the solid line. The stopper 39 also restricts rotation of the weft guide 36 toward the upper side from the non-measurement position shown by the broken line.
  • the controller 24 issues an instruction to actuate the moving means 38 of the weft guide unit 31.
  • This rotates the support arms 41 and 43 in the counterclockwise direction and moves the weft guides 36 and 37 to the measurement position as shown in Fig. 4 .
  • the support arms 41 and 43 stop at the measurement position.
  • the weft yarn Y that is held in the holding grooves 40 and 42 of the weft guides 36 and 37 and inserted into the measurement slot 33 at the measurement position travels toward the weft length measuring and storing device 5.
  • the parameters of the weft yarn Y such as the thickness are continuously measured by the weft sensor 30.
  • the measured parameters are transmitted from the weft sensor 30 to the controller 24, which stores the parameters.
  • the measured parameters are each analyzed and used as control data for, for example, weft insertion control.
  • the weft measurement device 4 Before measuring the parameters of the weft yarn Y, the weft measurement device 4 performs a reference level setting task that sets a reference level used to measure the parameters.
  • the reference level setting task is performed, for example, when operation of the air-jet loom 1 starts, when the air-jet loom 1 is restarted after being stopped for one reason or another, or for every certain number of operations performed by the air-jet loom 1.
  • the controller 24 issues an instruction that activates the moving means 38 during operation of the air-jet loom 1 to rotate the support arms 41 and 43 of the weft guide unit 31 in the clockwise direction as viewed in Fig. 5 .
  • the weft yarn Y is moved to the non-measurement position in an arcuate manner.
  • the weft yarn Y is moved from the measurement position toward the upper side by distance D1 and removed from the measurement slot 33 of the weft measuring portion 34.
  • the weft yarn Y is moved sideways to the non-measurement position that is separated by distance D2 from the vertical plane A (refer to Fig. 3 ), which includes the measurement position in the measurement slot 33.
  • the weft sensor 30 measures its sensitivity in the measurement slot 33, from which the weft yarn Y has been removed, and transmits the measured data to the controller 24.
  • the controller 24 sets the reference level of the weft sensor 30 based on the measured data and uses the reference level of the weft sensor 30 to measure the parameters of the weft yarn Y.
  • the holding force of the weft tensioner 3 decreases for one reason or another when the reference level setting task is performed with the weft yarn Y located at the non-measurement position, the tension applied to the weft yarn Y will decrease.
  • the weight of the weft yarn Y may cause the weft yarn Y to droop as shown by weft yarn Y1 in a broken line.
  • the weft yarn Y is moved to the non-measurement position that is separated sideways by distance D2 from a position located above the measurement slot 33 of the weft measuring portion 34.
  • the drooping weft yarn Y1 does not droop into the weft measuring portion 34. Accordingly, a setting failure of the reference level does not occur when performing the reference level setting task that measures the sensitivity of the weft sensor 30.
  • the weft guide unit 31 moves to the non-measurement position and shifts to a state in which the parameters of the weft yarn Y are not measured, even if the weft yarn Y loosens and droops, the weft yarn Y does not move into the weft measuring portion 34. Thus, the weft yarn Y does not interfere with the reference level setting task of the weft sensor 30. Further, since there is no need to take into account the influence of a loose weft yarn, the movement amount of the weft guide unit 31 may be minimized. Reduction in the movement amount of the weft guide unit 31 avoids increases in the tension applied to the weft yarn Y when bending the moving weft yarn Y. This obviates damage and/or breaking of the weft yarn Y.
  • the weft yarn Y is moved in an arcuate manner between the measurement position and the non-measurement position.
  • the time and amount of the movement between the measurement position and the non-measurement position is smaller than when moving the weft yarn Y separately in the vertical and sideway directions.
  • the time for the reference level setting task of the parameters of the weft yarn Y may be shortened.
  • Fig. 6 shows a second embodiment.
  • the weft yarn Y is moved straight between the measurement position and the non-measurement position.
  • the weft sensor 30 of the weft measurement device 4 of the second embodiment has the same structure as that of the first embodiment.
  • a weft guide unit 50 includes a weft guide 51 (only one side of weft measuring portion 34 is shown) and a moving means 52.
  • the weft guide 51 includes a U-shaped holding groove 53 that opens toward the upper side of the measurement slot 33.
  • the moving means 52 includes an air cylinder 54 and a piston rod 55.
  • the lower end of the weft guide 51 is fixed to an end of the piston rod 55.
  • the weft guide unit 50 which includes the weft guide 51 and the air cylinder 54 and the piston rod 55 of the moving means 52, extends toward an end of the housing 32 inclined relative to the measurement slot 33, which extends in the vertical direction.
  • the controller 24 issues an instruction to the moving means 52 to activate the air cylinder 54. Activation of the moving means 52 projects the piston rod 55 and moves the weft guide 51 in a direction intersecting the measurement slot 33 between the measurement position shown by the solid line and the non-measurement position shown by the broken line.
  • the weft yarn Y is moved from the measurement position of the weft yarn Y toward the upper side by distance D3 and removed from the measurement slot 33. Further, the weft yarn Y reaches the non-measurement position that is separated sideways by distance D4 from the vertical plane A including the measurement position.
  • the moving means 52 of the air cylinder 54 moves the weft guide 51 in a direction inclined relative to the measurement slot 33. This allows the non-measurement position of the weft yarn Y to be set at a position separated from above the measurement position. Accordingly, the same advantage as the first embodiment is obtained.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP16196393.9A 2015-11-06 2016-10-28 Weft measurement device for loom Not-in-force EP3165646B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015218068A JP6374369B2 (ja) 2015-11-06 2015-11-06 織機における緯糸測定装置

Publications (3)

Publication Number Publication Date
EP3165646A2 EP3165646A2 (en) 2017-05-10
EP3165646A3 EP3165646A3 (en) 2017-06-14
EP3165646B1 true EP3165646B1 (en) 2018-08-01

Family

ID=57211392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16196393.9A Not-in-force EP3165646B1 (en) 2015-11-06 2016-10-28 Weft measurement device for loom

Country Status (4)

Country Link
EP (1) EP3165646B1 (ja)
JP (1) JP6374369B2 (ja)
CN (1) CN106929984B (ja)
BR (1) BR102016025391A2 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7077968B2 (ja) * 2019-01-14 2022-05-31 株式会社豊田自動織機 エアジェット織機の緯糸処理装置
CN114040879B (zh) * 2019-06-19 2023-12-12 希伯莱因股份公司 用于纺织机械的喷嘴系统、用于快速紧固系统的旋拧系统以及具有喷嘴系统的纺织机械

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE59308414D1 (de) * 1992-12-03 1998-05-20 Iro Ab Verfahren zum steuern eines fadenliefersystems und fadenliefersystem
JPH08218250A (ja) * 1995-02-15 1996-08-27 Micron Kiki Kk 緯糸送り出し装置
JPH08113849A (ja) * 1994-10-19 1996-05-07 Toyota Autom Loom Works Ltd 織機における緯糸取り扱い装置
JPH08311745A (ja) * 1995-05-16 1996-11-26 Nissan Tecsys Kk ジェットルームの給糸装置
DE19841699A1 (de) * 1998-09-11 2000-03-16 Iro Patent Ag Fadenverarbeitungssystem
SE9900510D0 (sv) * 1999-02-15 1999-02-15 Iro Patent Ag Yarn processing system and method to operate a yarn processing system
DE10013776A1 (de) * 2000-03-20 2001-10-11 Iro Patent Ag Baar Verfahren zum Eintragen eines Elastomer-Fadens und Fadenverarbeitungssystem
EP1258550B1 (en) * 2001-05-11 2006-07-12 Kabushiki Kaisha Toyota Jidoshokki Weft insertion control apparatus in jet loom
DE502005008310D1 (de) * 2004-11-22 2009-11-26 Itema Switzerland Ltd Verfahren zum Abbremsen eines Schussfadens einer Webmaschine
EP2175058B1 (de) * 2008-10-10 2011-08-03 Gebrüder Loepfe AG Webmaschine mit Garnqualitätssensor
EP2732085B1 (en) * 2011-07-15 2019-06-26 Toyota Industries Corporation A loom with assigned yarn sensor and method for the operation thereof

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Also Published As

Publication number Publication date
CN106929984B (zh) 2018-09-04
BR102016025391A2 (pt) 2017-05-09
CN106929984A (zh) 2017-07-07
EP3165646A2 (en) 2017-05-10
JP2017089026A (ja) 2017-05-25
EP3165646A3 (en) 2017-06-14
JP6374369B2 (ja) 2018-08-15

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