EP3498901A1 - Verfahren zum erkennen eines schussfadens in einer luftdüsenwebmaschine - Google Patents

Verfahren zum erkennen eines schussfadens in einer luftdüsenwebmaschine Download PDF

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Publication number
EP3498901A1
EP3498901A1 EP18210340.8A EP18210340A EP3498901A1 EP 3498901 A1 EP3498901 A1 EP 3498901A1 EP 18210340 A EP18210340 A EP 18210340A EP 3498901 A1 EP3498901 A1 EP 3498901A1
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EP
European Patent Office
Prior art keywords
weft yarn
detection
threshold
weft
detection period
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Granted
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EP18210340.8A
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English (en)
French (fr)
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EP3498901B1 (de
Inventor
Yoichi Makino
Ryuji Arai
Natsuki Kakiuchi
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Toyota Industries Corp
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Toyota Industries Corp
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    • 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
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • the present disclosure relates to a method of detecting a weft yarn in an air jet loom.
  • Japanese Patent Application Publication No. H11-189953 discloses a method of detecting a weft yarn in an air jet loom.
  • the air jet loom includes an integrator that integrates detection signals that are output from a weft yarn detection device, and an electric discharge time constant of the integrator is determined and set in accordance with the elasticity of the weft yarn.
  • Japanese Patent Application Publication No. S59-187647 that discloses another method of detecting a weft yarn, three weft yarn detection devices are arranged along a weft yarn insertion passage. A state of weft insertion is determined based on a resultant combination of detection signals output from each weft yarn detection device to detect a turning back of a weft yarn.
  • the electric discharge time constant of the integrator needs to be set appropriately in accordance with the elasticity of the weft yarn.
  • the setting of the specific constant requires fine adjustment that should be performed taking the properties of a weft yarn used, such as the elasticity, into consideration, and such adjustment is difficult.
  • the method of detecting a weft yarn disclosed in Japanese Patent Application Publication No. S59-187647 requires a plurality of weft yarn detection devices and therefore has a problem that the cost for the components of the air jet loom and hence the man-hour for manufacturing the air jet loom are increased.
  • the present disclosure which has been made in view of the above circumstances, is directed to providing a method of detecting a weft yarn with which a turning back of an inserted weft yarn can be detected with ease.
  • the air jet loom includes an optical type weft yarn detection device that is disposed adjacent to an end of a woven fabric that is opposite to a weft insertion side of the air jet loom from which a weft yarn is inserted.
  • the optical type weft yarn detection device is configured to detect the inserted weft yarn and output a detection signal.
  • the method includes: setting a first weft yarn detection period between a point in time after a start of a weft insertion at which a weft yarn is inserted and a point in time before the weft insertion is completed; setting a second weft yarn detection period within the first weft yarn detection period so that the second weft yarn detection period starts after the inserted weft yarn is held by warp yarns; setting a first threshold for the detection signal detected during the first weft yarn detection period; and setting a second threshold for the detection signal detected during the second weft yarn detection period.
  • the method further includes determining that a turning back of the weft yarn has occurred when the detection signal detected during the first weft yarn detection period is equal to or greater than the first threshold and the detection signal detected during the second weft yarn detection period is smaller than the second threshold.
  • the inserted weft yarn once reached the end of the woven fabric but turned back toward the woven fabric.
  • FIG. 1 illustrates an end of a woven fabric on one side of the air jet loom that is opposite to the weft insertion side of the air jet loom from which weft yarns are inserted.
  • the air jet loom includes a slay 10 that is fixed to a rocking shaft (not illustrated) via a slay sword (not illustrated).
  • the slay 10 is turned about an axis extending in a width direction of the air jet loom (or in a weaving direction).
  • the slay 10 includes a reed 20 which has a weft yarn guide passage 40 that is opened on a cloth fell 30 side.
  • a temple 60 is disposed so as to extend over an end 51 of a woven fabric 50 and a waste selvedge 52 in the width direction of the air jet loom.
  • a weft yarn Y which has passed by the temple 60, is cut with a cutter 70 disposed between the woven fabric 50 and the waste selvedge 52.
  • the weft yarn Y is transferred by air jets from a main nozzle (not illustrated) and a tandem nozzle (not illustrated).
  • a plurality of auxiliary nozzles 80 is disposed at intervals on the slay 10 so as to transfer the inserted weft yarn Y with air jets from the auxiliary nozzles 80.
  • warp yarns 53 form the woven fabric 50 and waste selvedge yarns 54 form the waste selvedge 52.
  • An RH feeler 91 is mounted on the slay 10 at a position in the width direction of the air jet loom between one of the warp yarns 53 located at the end 51 of the woven fabric 50 and the waste selvedge yarns 54.
  • a W feeler 92 is disposed such that the waste selvedge yarns 54 are located between the RH feeler 91 and the W feeler 92 in the width direction of the air jet loom.
  • the warp yarns 53 and the waste selvedge yarns 54 correspond to the warp yarns of the present disclosure.
  • the RH feeler 91 and the W feeler 92 each include a light-emitting portion having a light-emitting element and the like (not shown) and a light-receiving portion having a light-receiving element and the like (not shown).
  • the RH feeler 91 and the W feeler 92 are disposed such that the light-emitting portions and the light-receiving portions face the weft yarn guide passage 40 of the reed 20.
  • the RH feeler 91 and the W feeler 92 are reflection type optical sensors.
  • each of the RH feeler 91 and the W feeler 92 light emitted from the light-emitting portion is reflected by the weft yarn Y, and the reflected light is received by the light-receiving portion, which constitutes a detection of the weft yarn Y, and in response to the detection of the weft yarn Y, a detection signal is output as a pulse signal.
  • the RH feeler 91 forms the optical type weft yarn detection device of the present disclosure.
  • the RH feeler 91 and the W feeler 92 are electrically connected to a main controller 100 of the air jet loom.
  • the RH feeler 91 is configured to detect that the weft yarn Y is transferred to the position of the waste selvedge 52.
  • the W feeler 92 is configured to detect an arrival of the weft yarn Y at an abnormal position beyond the position of the waste selvedge 52 that has resulted from a breakage of the weft yarn Y or a weft yarn Y of an excess length.
  • the RH feeler 91 detects the weft yarn Y during a weft insertion and outputs a pulse signal to the main controller 100 as a detection signal.
  • the main controller 100 counts the number of pulses in the detection signal received.
  • FIGS. 2A to 2C the RH feeler 91 and the W feeler 92 illustrated in FIG. 1 are located above the weft yarn guide passage 40, and some of the components illustrated in FIG. 1 are not illustrated for ease of understanding.
  • the inserted weft yarn Y is transferred in a direction indicated by an arrow A within the weft yarn guide passage 40.
  • the weft yarn Y is thus transferred to the position of the waste selvedge yarns 54.
  • the weft yarn Y travels through and interlaces with the waste selvedge yarns 54, and the waste selvedge yarns 54 hold the weft yarn Y between them. In this case, the weft insertion is completed successfully.
  • the weft yarn Y is detected by the RH feeler 91 both before and after the weft yarn Y is held by the waste selvedge yarns 54, and the weft yarn Y is not transferred to the position of the W feeler 92 and stops at a position where the W feeler 92 cannot detect the weft yarn Y. That is, the weft yarn Y is out of the detection range of the W feeler 92.
  • a weft yarn Y1 illustrated in FIG. 2B there may occur a phenomenon called turning back of the weft yarn in which a weft yarn Y, which has once been transferred to the position of the waste selvedge yarns 54, fails to be held by the waste selvedge yarns 54, for example, due to the elasticity of the weft yarn Y.
  • the weft yarn Y is at a position where the weft yarn Y is detected by the RH feeler 91 but not detected by the W feeler 92.
  • This type of turning back does not constitute a defect because the weft yarn Y does not go back to the woven fabric 50.
  • the above-described turning back of the weft yarn Y illustrated in FIG. 2B corresponds to the turning back of the weft yarn of the present disclosure in which an inserted weft yarn once reaches an end of a woven fabric but turns back toward the woven fabric.
  • FIG. 2C another type of the turning back which constitutes a defect of the fabric may occur.
  • the weft yarn Y2 illustrated in FIG. 2C the weft yarn Y has once reached the position of the waste selvedge yarns 54, but the weft yarn Y fails to be held by the waste selvedge yarns 54 and turns back to the woven fabric 50, constituting a defect of the fabric.
  • the turning back illustrated in FIG. 2C illustrates the turning back of a weft yarn Y2 illustrated in FIG. 2C .
  • the weft yarn Y stops at a position where the weft yarn Y is not detected by the RH feeler 91 and the W feeler 92 after a timing at which the weft yarn Y is supposed to be held by the waste selvedge yarns 54. That is, the weft yarn Y is out of the detection ranges of the RH feeler 91 and the W feeler 92.
  • the above-described turning back of the weft yarn Y illustrated in FIG. 2C also corresponds to the turning back of the weft yarn of the present disclosure.
  • the inserted weft yarn Y is detected by the RH feeler 91 before and after the waste selvedge yarns 54 hold the weft yarn Y.
  • the detection signal sent from the RH feeler 91 both during a time frame before the inserted weft yarn Y is held by the waste selvedge yarns 54, which is measured from the weft insertion start timing, and during a time frame after the inserted weft yarn Y is held by the waste selvedge yarns 54.
  • the main controller 100 counts the number of pulses in the detection signal output from the RH feeler 91 (see FIG. 1 ) during a time frame between a first detection start timing T1 and a second detection start timing T2, and during a time frame between the second detection start timing T2 and a detection end timing T3, as illustrated in FIG. 3 .
  • the first detection start timing T1, the second detection start timing T2, and the detection end timing T3 herein are each determined beforehand based on a rotational angle of a crank of the air jet loom.
  • the first detection start timing T1 is a timing specified after a timing at which a weft insertion starts.
  • the second detection start timing T2 is a timing at which the waste selvedge yarns 54 hold the weft yarn Y, which happens when the weft insertion is successful.
  • the detection end timing T3 is a timing specified before a timing at which the weft insertion ends. It is to be noted that in the second detection start timing T2, "the waste selvedge yarns 54 hold the weft yarn Y" refers not only to a complete contact between the waste selvedge yarns 54 and the weft yarn Y but also to application of any braking force between the waste selvedge yarns 54 and the weft yarn Y caused, for example, by a fluff of the waste selvedge yarns 54 or the weft yarn Y.
  • a time frame between the first detection start timing T1 and the detection end timing T3 is set as a first weft yarn detection period P1
  • a time frame between the second detection start timing T2 and the detection end timing T3 is set as a second weft yarn detection period P2.
  • the second weft yarn detection period P2 is a time frame set within the first weft yarn detection period P1.
  • the first weft yarn detection period P1 when the number of pulses in the detection signal reaches a specified threshold, it is determined that the weft yarn Y is at the position of the RH feeler 91.
  • the threshold is herein referred to as a first pulse threshold S1.
  • the first pulse threshold S1 is a count of 13.
  • the second pulse threshold S2 is a count of 5.
  • the first pulse threshold S1 and the second pulse threshold S2 correspond to the first threshold and the second threshold, respectively, of the present disclosure.
  • the weft yarn Y is transferred to the position of the waste selvedge yarns 54 before the second detection start timing T2 is reached.
  • the weft yarn Y is detected by the RH feeler 91 during the first weft yarn detection period P1. Therefore, 13, which is the predetermined first pulse threshold S1, or more pulses are counted and detected in the detection signal during the whole first weft yarn detection period P1. In Example 1, 15 pulses are detected.
  • the weft yarn Y Since the weft insertion is successfully completed, the weft yarn Y is kept held after the second detection start timing T2 and does not return to the woven fabric 50. Therefore, in the second weft yarn detection period P2, the duration in which the weft yarn Y is detected by the RH feeler 91 is sufficiently long, so that five pulses, which corresponds to the predetermined second pulse threshold S2, or more pulses are counted and detected in the detection signal. In Example 1, five pulses are detected.
  • the main controller 100 determines that the weft insertion has been successfully completed.
  • the first pulse threshold S1 and the second pulse threshold S2 may appropriately be modified in accordance with the weft yarn Y to be detected or specifications of the air jet loom.
  • Example 2 Determination of a weft insertion failure, which is illustrated as Example 2 in FIG. 3 , will now be described.
  • a weft insertion failure occurs and the weft yarn Y does not reach the position of the waste selvedge yarns 54. Therefore, the weft yarn Y is not detected by the RH feeler 91 both in the first and second weft yarn detection periods P1 and P2.
  • the number of pulses counted in the detection signal during the first weft yarn detection period P1 is smaller than 13 or the first pulse threshold S1; and the number of pulses counted in the detection signal during the second weft yarn detection period P2 is smaller than 5 or the second pulse threshold S2.
  • the main controller 100 determines that a weft insertion failure has occurred.
  • Example 3 Determination of a turning back of a weft yarn, which is illustrated as Example 3 in FIG. 3 , will now be described.
  • the weft yarn Y is inserted at an earlier timing, so that the weft yarn Y reaches the position of the waste selvedge yarns 54 before the second detection start timing T2 is reached. Therefore, the weft yarn Y is detected by the RH feeler 91.
  • 13 pulses which corresponds to the first pulse threshold S1, or more pulses are counted and detected in the detection signal between the first detection start timing T1 and the second detection start timing T2.
  • 15 pulses are detected.
  • the weft yarn Y has returned to the woven fabric 50 side after the second detection start timing T2, so that the weft yarn Y is out of the detection range of the RH feeler 91.
  • the weft yarn Y is not detected by the RH feeler 91 during the second weft yarn detection period P2, so that the number of pulses in the detection signal detected during the second weft yarn detection period P2 is smaller than 5, which is the second pulse threshold S2.
  • the main controller 100 determines that a turning back of the weft yarn Y has occurred.
  • the air jet loom includes an optical type weft yarn detection device that is disposed adjacent to the end 51 of the woven fabric that is opposite to the weft insertion side of the air jet loom.
  • the optical type weft yarn detection device is configured to detect the inserted weft yarn Y and output a detection signal.
  • the detection method includes the following: the first weft yarn detection period P1, which is a time frame set between a point in time after a start of weft insertion and a point in time before the weft insertion is completed; the second weft yarn detection period P2, which is a time frame set within the first weft yarn detection period P1 and starts after the weft yarn Y is held by the waste selvedge yarns 54; the first pulse threshold S1 that is set for the detection signal detected during the first weft yarn detection period P1; and the second pulse threshold S2 that is set for the detection signal detected during the second weft yarn detection period P2.
  • the detection method when the condition that the number of pulses in the detection signal that are detected during the first weft yarn detection period P1 is equal to or greater than the first pulse threshold S1 and the condition that the number of pulses in the detection signal that are detected during the second weft yarn detection period P2 is smaller than the second pulse threshold S2 are satisfied, an occurrence of a turning back of the weft yarn Y is determined. Thus, a turning back of a weft yarn can be detected easily.
  • the detection signal is a pulse signal, and a specified number of pulses in the pulse signal is set for each of the first and second pulse thresholds S1 and S2. Therefore, the detection of the weft yarn Y may be performed accurately.
  • the method of detecting a weft yarn in an air jet loom of the second embodiment is different from the detection method of the first embodiment in that, as the detection signal that indicates detection of the weft yarn Y, a pulse signal and a level signal are used in combination, and a number of pulses in the pulse signal and a value of the level signal are specified as the thresholds for determining the weft insertion detection result of the weft yarn Y.
  • the air jet loom includes an RH feeler 93 that is disposed at the same position as the RH feeler 91.
  • the numeral 93 denoting the RH feeler 93 of the second embodiment is shown in parentheses in FIG. 1 .
  • the RH feeler 93 is also a reflection type optical sensor that includes a light-emitting portion and a light-receiving portion, and is disposed at the same position and in the same manner as the RH feeler 91.
  • the RH feeler 93 outputs a detection signal as a level signal.
  • the RH feeler 93 is electrically connected to a main controller 200 of the air jet loom.
  • the numeral 200 denoting the main controller 200 is shown in parentheses in FIG. 1 .
  • the RH feeler 93 forms the optical weft yarn detection device of the present disclosure.
  • the second embodiment is the same as the first embodiment.
  • FIG. 2A illustrates a weft insertion in which the weft yarn Y is transferred successfully in the arrow A direction.
  • the weft yarn Y has been transferred to a position in the detection range of the RH feeler 93.
  • the reference numerals 93 and 200 denoting the RH feeler 93 and the main controller 200, respectively are shown in parentheses.
  • FIG. 2B illustrates a weft insertion in which the weft yarn Y, which has once been transferred in the direction of the arrow A, is caused to turn back, like the weft yarn Y1 of the first embodiment, but does not return to the woven fabric 50.
  • the weft yarn Y stops at a position in the detection range of the RH feeler 93.
  • FIG. 2C illustrates a weft insertion in which a weft yarn Y, which has once been transferred in the direction of the arrow A, is caused to turn back to the woven fabric 50, like the weft yarn Y2 of the first embodiment, constituting a defect of the fabric.
  • the weft yarn Y stops at a position that is out of the detection range of the RH feeler 93.
  • the air jet loom may not be able to detect pulses in the detection signal properly and therefore reliable detection may not be performed by the general detection method that uses a pulse signal.
  • the presence or absence of a weft yarn Y may be determined by detecting a level of a signal.
  • detection using a pulse signal is more suitable than the detection using a level signal. Therefore, in the method of detecting a weft yarn Y with the RH feeler 93, a level signal and a pulse signal are used in combination, as described below.
  • the RH feeler 93 outputs a detection signal indicative of a detection of the weft yarn Y in a form of a level signal.
  • the vertical axis represents the strength of the level signal
  • the horizontal axis represents time
  • the predetermined detection start timings that are determined beforehand based on the rotational angle of the crank of the air jet loom are depicted.
  • the main controller 200 rectifies the full wave of the level signal that is output by the RH feeler 93 to thereby obtain a pulse signal as the detection signal.
  • the threshold is herein referred to as a first level threshold S3.
  • the second weft yarn detection period P2 when the level of the detection signal reaches another specified threshold, it is determined that the weft yarn Y is at the position of the RH feeler 93.
  • the threshold is herein referred to as a second level threshold S4.
  • the first pulse threshold S1 and the first level threshold S3 correspond to the first threshold of the present disclosure
  • the second pulse threshold S2 and the second level threshold S4 correspond to the second threshold of the present disclosure.
  • the main controller 200 determines whether the number of pulses in the pulse signal detected during the first weft yarn detection period P1 is equal to or greater than the first pulse threshold S1, and at the same time determines whether the level of the level signal detected during the first weft yarn detection period P1 is equal to or greater than the first level threshold S3.
  • the main controller 200 determines that the weft yarn Y is at the position of the RH feeler 93 in the first weft yarn detection period P1.
  • the main controller 200 also determines whether the number of pulses in the pulse signal detected during the second weft yarn detection period P2 is equal to or greater than the second pulse threshold S2, and at the same time determines whether the level of the level signal detected during the second weft yarn detection period P2 is equal to or greater than the second level threshold S4. When either a condition that the number of pulses in the pulse signal is equal to or greater than the second pulse threshold S2 or a condition that the level of the level signal is equal to or greater than the second level threshold S4 is satisfied, then the main controller 200 determines that the weft yarn Y is at the position of the RH feeler 93 in the second weft yarn detection period P2.
  • the method of determining an occurrence of a turning back of the weft yarn Y based on the presence or absence of the weft yarn Y in the first and second weft yarn detection periods P1 and P2 is the same as the method described in the first embodiment.
  • the weft yarn Y is transferred to the position of the waste selvedge yarns 54 before the second detection start timing T2 is reached.
  • the weft yarn Y is detected by the RH feeler 93 during the first weft yarn detection period P1.
  • the main controller 200 confirms at least either the number of pulses in the detection signal that is equal to or greater than the predetermined first pulse threshold S1 or the level of the detection signal that is equal to or greater than the predetermined first level threshold S3.
  • the main controller 200 confirms at least either the number of pulses in the detection signal that is equal to or greater than the predetermined second pulse threshold S2 or the level of the detection signal that is equal to or greater than the predetermined second level threshold S4.
  • the main controller 200 determines that the weft insertion has successfully been completed.
  • the weft yarn Y is not detected by the RH feeler 93 both in the first and second weft yarn detection periods P1 and P2. Therefore, in the first weft yarn detection period P1, the number of pulses in the detection signal detected by the main controller 200 is smaller than the first pulse threshold S1, and the level of the detection signal detected by the main controller 200 is smaller than the first level threshold S3. In the second weft yarn detection period P2, the number of pulses in the detection signal detected by the main controller 200 is smaller than the first level threshold S3, and the level of the detection signal detected by the main controller 200 is smaller than the second level threshold S4.
  • the main controller 200 determines that a weft insertion failure has occurred.
  • the main controller 200 confirms at least either the number of pulses in the detection signal that is equal to or greater than the predetermined first pulse threshold S1 or the level of the detection signal that is equal to or greater than the predetermined first level threshold S3.
  • the main controller 200 confirms the number of pulses in the detection signal that is smaller than the predetermined first pulse threshold S1 and the level of the detection signal that is smaller than the predetermined second level threshold S4.
  • the main controller 200 determines that a turning back has occurred.
  • a pulse signal and a level signal are used as the detection signals, and a number of pulses and a level are specified for each of the first threshold and the second threshold. Therefore, when the weft yarn Y to be detected is black colored or thin, the weft yarn Y may be detected by using a pulse signal and a level signal in combination.
  • the feelers 91 and 93, and the W feeler 92 are provided by reflection type optical sensors
  • the feelers may be provided by transmission type optical sensors.
  • the light-emitting portion and the light-receiving portion of each transmission type optical sensor are disposed opposite to each other across the weft insertion passage so that the light-receiving portion receives light from the light-emitting portion when the weft yarn Y is not present between them.
  • An interception of the light from the light-emitting portion to the light-receiving portion constitutes a detection of the weft yarn Y.
  • a weft insertion result is determined based on the detecting condition of the weft yarn Y in the first and second weft yarn detection periods P1 and P2.
  • a delayed arrival of the weft yarn Y may further be determined when the condition that the number of pulses in the detection signal detected during the first weft yarn detection period P1 is smaller than the first pulse threshold S1 and the condition that the number of pulses in the detection signal detected during the second weft yarn detection period P2 is equal to or greater than the second pulse threshold S2 are satisfied.
  • a method of detecting a weft yarn in an air jet loom includes: setting a first weft yarn detection period (P1); setting a second weft yarn detection period (P2); setting a first threshold (S1, S3) for the detection signal detected during the first weft yarn detection period (P1); setting a second threshold (S2, S4) for the detection signal detected during the second weft yarn detection period (P2); and, when the detection signal detected during the first weft yarn detection period (P1) is equal to or greater than the first threshold (S1, S3) and the detection signal detected during the second weft yarn detection period (P2) is smaller than the second threshold (S2, S4), determining that a turning back of the inserted weft yarn (Y) has occurred in which the inserted weft yarn (Y) once reached an end (51) of a woven fabric (50) but turned back toward the woven fabric (50).

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EP18210340.8A 2017-12-14 2018-12-05 Verfahren zum erkennen eines schussfadens in einer luftdüsenwebmaschine Active EP3498901B1 (de)

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JPS59187647A (ja) 1983-04-01 1984-10-24 津田駒工業株式会社 織機の緯欠点検出停止装置
JPH11189953A (ja) 1997-12-25 1999-07-13 Tsudakoma Corp 織機の緯糸フィーラ
BE1024064B1 (fr) * 2015-11-03 2017-11-10 Kabushiki Kaisha Toyota Jidoshokki Procédé de détection d'un fil de trame dans un métier à tisser du type à jet d'air.

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JP2003113555A (ja) * 2001-10-05 2003-04-18 Tsudakoma Corp 無杼織機における異常検知方法及び装置
JP6372229B2 (ja) * 2014-08-04 2018-08-15 株式会社豊田自動織機 ジェットルームにおける緯糸検出装置
JP6566756B2 (ja) * 2015-07-15 2019-08-28 株式会社豊田自動織機 織機における緯糸検出装置
CN107043986B (zh) * 2017-05-17 2018-09-07 杭州汇坤控制技术有限公司 一种数字探纬方法及系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59187647A (ja) 1983-04-01 1984-10-24 津田駒工業株式会社 織機の緯欠点検出停止装置
JPH11189953A (ja) 1997-12-25 1999-07-13 Tsudakoma Corp 織機の緯糸フィーラ
BE1024064B1 (fr) * 2015-11-03 2017-11-10 Kabushiki Kaisha Toyota Jidoshokki Procédé de détection d'un fil de trame dans un métier à tisser du type à jet d'air.

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CN109957872B (zh) 2020-10-20
JP6922714B2 (ja) 2021-08-18
EP3498901B1 (de) 2020-04-29
JP2019105013A (ja) 2019-06-27

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