WO2003035954A2 - Procede et dispositif de detection de rupture de chaine dans un metier a tisser a injection de fluide - Google Patents

Procede et dispositif de detection de rupture de chaine dans un metier a tisser a injection de fluide Download PDF

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Publication number
WO2003035954A2
WO2003035954A2 PCT/JP2002/010737 JP0210737W WO03035954A2 WO 2003035954 A2 WO2003035954 A2 WO 2003035954A2 JP 0210737 W JP0210737 W JP 0210737W WO 03035954 A2 WO03035954 A2 WO 03035954A2
Authority
WO
WIPO (PCT)
Prior art keywords
weft
timing
yarn
signal
breakage
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
PCT/JP2002/010737
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English (en)
Japanese (ja)
Other versions
WO2003035954A3 (fr
Inventor
Minoru Isa
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.)
Tsudakoma Corp
Original Assignee
Tsudakoma Industrial Co 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 Tsudakoma Industrial Co Ltd filed Critical Tsudakoma Industrial Co Ltd
Priority to EP02802017A priority Critical patent/EP1439251A2/fr
Publication of WO2003035954A2 publication Critical patent/WO2003035954A2/fr
Publication of WO2003035954A3 publication Critical patent/WO2003035954A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • D03D47/28—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
    • D03D47/3073—Detection means therefor
    • 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
    • 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
    • D03D47/32—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 liquid jet
    • 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
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • the present invention relates to a method and an apparatus for detecting weft breakage of a fluid jet loom, and more particularly to a method and an apparatus for detecting that one or more wefts out of a plurality of wefts to be inserted at the same time are broken.
  • a weft sensor that forms a beneficiary detection area is placed on the weft flight path on the reverse weft entry side, and when weft is not detected at a predetermined timing.
  • a weft breakage detection device Another example of a weft breakage detection device is that an optical yarn sensor detects a weft balloon that is drawn from a yarn feeder to a length measuring and storage device, and a release signal is generated.The release signal is no longer generated.
  • There is a technology that determines that the weft of the yarn supplying body has run out and generates a yarn supplying yarn breakage signal Japanese Patent Application Laid-Open No. HEI 3-1-191646).
  • An object of the present invention is to provide a fluid jet loom in which a plurality of wefts are simultaneously inserted into a warp shed, and a device having a simple structure detects any breakage of one of the wefts occurring upstream of the weft insertion nozzle. Is to get it.
  • the weft break detection method and apparatus according to the present invention are applied to a weft break detection technology of a fluid jet loom that simultaneously inserts a plurality of wefts into a warp shed.
  • Such a weft break detection method measures the arrival timing of the weft via a weft sensor arranged on the weft movement path, compares the measured arrival timing with the reference timing, and the arrival timing is earlier than the reference timing. This includes detecting that a thread break has occurred when the state has occurred a predetermined number of times in succession.
  • Such a weft breakage detecting device measures the arrival timing of the weft via a weft sensor arranged on the weft movement path, and when the measured arrival timing is earlier than the reference timing, an early detection unit that generates a logic signal. And a determination unit that outputs a thread break signal when the logic signal is input a plurality of times in succession.
  • FIG. 1 is a view showing one embodiment of a fluid jet loom equipped with a yarn breakage detecting device according to the present invention.
  • FIG. 2 is a block diagram of an electric circuit showing an embodiment of a weft detecting device provided with the yarn break detecting device according to the present invention.
  • a fluid jet loom 10 using a weft breakage detecting device presses a plurality of (two in the illustrated example) wefts 12 into the openings of the warp 14 in the illustrated example. It is configured as an air-jet loom that wefts simultaneously with air.
  • each weft 12 is measured from the yarn supplying body 16 by the length of one pick to the length measuring storage device 18 by one pick and locked by the locking pin 20. It is stored and passed through the weft insertion nozzle 22 at the tip end. At the time of weft insertion, both the wefts 12 are unwound from the length measuring and storing device 18 and are simultaneously inserted into the opening of the warp 14 from the weft insertion nozzle 22 together with the compressed air for weft insertion.
  • both wefts 12 are further subjected to a flying force by the compressed air injected from the plurality of sub-nozzles 24.
  • the inserted weft yarn is beaten to the weave by a knot (not shown) and woven into the woven fabric 26, and thereafter is upstream by the cutter 28 between the weft insertion nozzle 22 and the woven fabric 26. Cut off from the side thread part.
  • the surveying storage is performed by the traction force of the weft insertion nozzle 22 and the sub-nozzle 24.
  • a balloon is drawn from device 18. This weft balloon is detected by an unwinding sensor for each weft 12 using a light transmitter 30 and a light receiver 32, and its output signal, that is, the unwind signal S1, is measured when the weft is wound. It is supplied to a control device (not shown) as a signal indicating that it has been extracted (unwound) from the long storage device 18.
  • the leading end of the inserted weft is detected by the yarn sensor 34 arranged on the non-yarn supply side and is also caught by a plurality of catch codes 36.
  • the yarn sensor 34 includes a light emitter and a light receiver, and outputs an H-level yarn signal S2, which indicates that there is a yarn, to the weft detection device 40 when a weft exists in the weft detection area between the persons. I do.
  • the catch cord 36 forms an opening with the warp 14 and catches the weft leading end cut at an appropriate time.
  • An angle signal 0 is supplied to the weft detecting device 40 in addition to the yarn signal S2.
  • the angle signal 0 is a signal indicating the rotation angle of the main shaft 42 of the loom, and is generated by the encoder 44 that detects the rotation angle of the main shaft 42.
  • the weft detecting device 40 checks whether the yarn signal S2 is input when the rotation angle of the main shaft 42 is a predetermined value. When the input is not made, it is determined that the weft insertion is wrong, and the loom stop signal S3 at the H level for stopping the loom is output to a control device (not shown).
  • the loom stop signal S3 at this time is a weft insertion error signal.
  • the yarn signal S 2 is generated as long as one or more weft yarns 12 are present in the weft detection area of the yarn sensor 34. For this reason, at least one of the plurality of wefts 12 to be inserted at the same time.Even if one weft 12 is broken due to wear or cutting of the weft, the other weft can reach. If this is detected, a yarn signal is output and a yarn break cannot be detected.
  • the jetting fluid for weft operation acts only on the normal weft, and the so-called arrival timing at which the normal weft reaches the predetermined position is compared to when the weft is inserted normally. Faster.
  • the weft detecting device 40 also measures the so-called arrival timing at which the leading end of the weft 12 reaches the position where the yarn sensor 34 is arranged, based on the supplied yarn signal S2 and angle signal 0, When the arrival timing is earlier than the reference timing compared to the measured reference timing, multiple consecutive occurrences have occurred, and it is determined that one of the weft yarns has broken, and the loom is stopped.
  • the signal S3 is output to a control device (not shown).
  • the loom stop signal S3 at this time is a yarn break signal.
  • the yarn breakage is detected, so that the yarn breakage of one or more wefts is reliably detected. Since the detection circuit can be used in common for a plurality of wefts, the structure of the weft detection device 40 can be simplified. With reference to FIG. 2, a specific example of the above-described weft detecting device 40 will be described.
  • the weft detector 40 receives the yarn signal S 2 from the yarn sensor 34 at the weft insertion error detector 50 and the yarn break detector 52, and receives the angle signal ⁇ ⁇ from the encoder 44 to the yarn break detector 5. 2 and the timing signal generator 54.
  • the timing signal generator 54 Based on the input angle signal 0, the timing signal generator 54 outputs the timing signal S4 that becomes H level only during the period corresponding to the weft detection period to the weft insertion error detection unit 50 and the advance detection unit 52. Supply.
  • the generation timing of the timing signal S4 is set in the timing setting unit 56.
  • Such a timing signal S4 is a signal that is turned on (H level) at 200 degrees, and turned off (L level) at 290 degrees when the crossing is set to 0 degree. Can be.
  • the weft insertion error detection section 50 checks whether the yarn signal S2 is input when the rotation angle of the main shaft 42 is a predetermined value. This is a well-known circuit that, when not input, determines a weft insertion error and outputs an H-level weft insertion error signal S5.
  • the yarn breakage detection section 52 receives the yarn signal S2 and the angle signal 0 at the arrival angle detector 58.
  • the arrival angle detector 58 detects the rotation angle ⁇ 1 of the main shaft when the leading end of the weft reaches the position where the yarn sensor 34 is located, based on the received yarn signal S2 and the angle signal ⁇ , and performs detection.
  • the output arrival angle 61 is output to the comparator 60 as the arrival timing S6.
  • the arrival angle 01 can be, for example, the value of the angle signal 0 (the rotation angle of the main shaft 42) when the thread signal S2 is turned on.
  • the comparator 60 compares the arrival timing S6 with the reference timing S7 set in the threshold value setting device 62, and determines that the arrival timing S6 is greater than the reference timing S7. When it is too early, a pulse-like signal S8 is generated to indicate that.
  • the arrival angle detector 58, the comparator 60, and the threshold value setting unit 62 form an advance detection unit 64 that measures that the arrival timing of the weft to the predetermined position is normal when it is normal.
  • the reference timing S7 set in the threshold value setting device 62 can be a timing at which all the wefts to be inserted at the same time normally reach the arrangement position of the yarn sensor 34. It is preferable that the reference timing S7 be in a range that does not include such a variation in consideration of the variation when all the wefts are normally inserted, and the output signal S8 of the advance detection unit 64 Is supplied to a counter 66.
  • the counter 6'6 counts the signal S8 and sets the threshold value every time the timing signal S4 is input. Compares with the reference count set in the container 68, and when the count value becomes equal to or more than the reference count, generates an H level thread break signal S9.
  • the counter 66 and the threshold value setting unit 68 form a discriminating unit 70 for judging whether or not the force has reached the arrival timing S6 earlier than the reference timing S7 by a predetermined number of times.
  • the reference timing of the threshold setting unit 62 is set to 22 degrees in consideration of this, while Set the reference count threshold value of threshold setting device 6 8 to 2. Then, during the operation of the loom, if the yarn breaks in one of the two wefts inserted simultaneously, the weft reaches 12 degrees earlier than the normal 230 degrees (that is, to 21.8 degrees). However, since the jet flow after the weft insertion of the next pick acts intensively on the normal (non-broken) weft, early arrival of the weft occurs continuously as in the previous pick.
  • the thread break detector 52 detects the second to third picks from the occurrence of the thread break.
  • the loom can be stopped by generating a stop signal.
  • the reference number set in the threshold value setting unit 68 is the number of times for determining that the yarn is broken, and a value of 2 or more is set. If the reference frequency is large, the stoppage of the loom is delayed, and if the reference frequency is too small, an erroneous stop (idling) occurs due to sudden advance. Therefore, it is desirable to determine the reference number based on actual operating conditions.
  • the thread break signal S 9 is supplied to one input terminal of the OR circuit 74 via the output circuit 72.
  • the OR circuit 74 receives the insertion error signal S5 at the other input terminal, and outputs a logical sum signal of the two input signals S5 and S9 as a loom stop signal S3.
  • the yarn breakage is detected when a state in which the arrival timing is earlier than the reference timing occurs multiple times in succession, so that the yarn breakage of one or more wefts can be reliably detected.
  • the advance detection unit 64, the discrimination unit 70, and the output circuit 72 can be commonly used by a plurality of wefts, and the structure of the device is simplified. In the above embodiment, the following modifications are possible.
  • the number of wefts input simultaneously is not limited to the above two, and may be three or more.
  • weft insertion devices such as a length measuring storage device and a weft insertion nozzle
  • weft breakage detection device The reference timing in the advance detection unit and the reference count in the determination unit are also set according to the yarn type, and weft insertion and weft breakage detection can be performed in response to switching of the selected yarn type.
  • a yarn sensor arranged in the warp opening for weft insertion control instead of using the signal of the yarn sensor 34 arranged on the non-weft insertion side to detect the presence / absence of yarn breakage, a yarn sensor arranged in the warp opening for weft insertion control,
  • the output signal of another yarn sensor disposed on the weft flight path such as a yarn sensor disposed downstream of the main nozzle, may be used, or the unwinding sensor in FIG. 1 or the yarn feeder 16 in FIG.
  • An output signal of a yarn sensor disposed on the remaining weft movement path excluding the weft flight path, such as a yarn sensor disposed between the length measurement storage device 18 and detecting the balloon, may be used.
  • the unwinding signal S 1 is indirectly related to the leading end position of the weft, such that the unwinding timing is related to the arrival timing. From this, it is possible to determine that the yarn is broken when the arrival timing (the timing of unwinding) is continuously advanced.
  • a yarn sensor for detecting the weft not only an optical sensor, but also a suitable type of sensor such as a contact type, a non-contact type, a capacitance type, a magnetic type, a reflection type, and a transmission type may be used. it can.
  • the yarn break detecting device may be made independent of the weft detecting device.
  • the rotation angle of the main shaft as a measure of the arrival timing
  • the elapsed time from the reference angle may be used.
  • the thread breakage detection function does not need to be constantly activated during operation of the loom, and may be deactivated according to control on the loom side. For example, in conjunction with known weft insertion control such as fluid injection timing control and pressure control to make the arrival timing constant or to change the winding diameter of the yarn supply, weft insertion control is performed. During the injection timing (during the change of the fluid pressure), the thread breakage detection function may be disabled. Also, the yarn breakage detection function may be disabled when the flight characteristics of the weft yarn change significantly, such as during the period immediately after start-up or when the yarn supply is switched.
  • weft insertion control such as fluid injection timing control and pressure control to make the arrival timing constant or to change the winding diameter of the yarn supply.
  • the present invention relates to a liquid jet loom using a liquid such as pressurized water as a weft insertion fluid. It can also be applied to such a weft breakage detecting device of another fluid jet loom.
  • the present invention is not limited to the above embodiments, and can be variously modified without departing from the gist thereof.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

L'invention concerne un procédé de détection de rupture de chaîne utilisé dans un métier à tisser à injection de fluide dans lequel une pluralité de chaînes sont introduites simultanément dans une ouverture prévue à cet effet. Ce procédé de détection de rupture de chaîne consiste à mesurer le temps d'arrivée d'une chaîne à l'aide d'un capteur de chaîne disposé dans un passage de déplacement de chaîne, à comparer le temps d'arrivée mesuré à un temps de référence et à détecter une rupture de fil lorsque, un nombre déterminé de fois de suite, le temps d'arrivée est inférieur au temps de référence.
PCT/JP2002/010737 2001-10-22 2002-10-16 Procede et dispositif de detection de rupture de chaine dans un metier a tisser a injection de fluide Ceased WO2003035954A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02802017A EP1439251A2 (fr) 2001-10-22 2002-10-16 Procede et dispositif de detection de rupture de chaine dans un metier a tisser a injection de fluide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001323353A JP2003129357A (ja) 2001-10-22 2001-10-22 流体噴射式織機の緯糸切れ検知方法及び装置
JP2001-323353 2001-10-22

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WO2003035954A2 true WO2003035954A2 (fr) 2003-05-01
WO2003035954A3 WO2003035954A3 (fr) 2003-12-04

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PCT/JP2002/010737 Ceased WO2003035954A2 (fr) 2001-10-22 2002-10-16 Procede et dispositif de detection de rupture de chaine dans un metier a tisser a injection de fluide

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EP (1) EP1439251A2 (fr)
JP (1) JP2003129357A (fr)
WO (1) WO2003035954A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025893C2 (nl) * 2004-04-07 2005-10-10 Te Strake Textile B V Waterweefinrichting alsmede een plunjerpomp voor een waterweefinrichting.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4889087B2 (ja) * 2005-10-17 2012-02-29 津田駒工業株式会社 流体噴射式織機における給糸体不良の判定方法
JP5821646B2 (ja) * 2012-01-17 2015-11-24 株式会社豊田自動織機 複数の緯糸を同時に緯入れする流体噴射式織機の緯糸切れ検出装置
CN103526435A (zh) * 2013-10-17 2014-01-22 大发科技集团有限公司 一种喷水横织机的纱线保护机构及其工作方法
JP2015206137A (ja) * 2014-04-21 2015-11-19 津田駒工業株式会社 水噴射式織機における緯入れ方法及び装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2698983B2 (ja) * 1988-07-22 1998-01-19 津田駒工業株式会社 緯糸検知方法
JP2000073261A (ja) * 1998-08-28 2000-03-07 Murata Mach Ltd 流体噴射式織機
JP3630368B2 (ja) * 2000-11-15 2005-03-16 津田駒工業株式会社 給糸切れ検知装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025893C2 (nl) * 2004-04-07 2005-10-10 Te Strake Textile B V Waterweefinrichting alsmede een plunjerpomp voor een waterweefinrichting.
WO2005098111A1 (fr) * 2004-04-07 2005-10-20 Te Strake Textile B.V. Metier a tisser a jet d'eau

Also Published As

Publication number Publication date
JP2003129357A (ja) 2003-05-08
WO2003035954A3 (fr) 2003-12-04
EP1439251A2 (fr) 2004-07-21

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