EP0554221A1 - Appareil pour contrôler la pression d'injection d'un fluide dans une buse auxiliaire d'un métier à jet - Google Patents

Appareil pour contrôler la pression d'injection d'un fluide dans une buse auxiliaire d'un métier à jet Download PDF

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Publication number
EP0554221A1
EP0554221A1 EP93810047A EP93810047A EP0554221A1 EP 0554221 A1 EP0554221 A1 EP 0554221A1 EP 93810047 A EP93810047 A EP 93810047A EP 93810047 A EP93810047 A EP 93810047A EP 0554221 A1 EP0554221 A1 EP 0554221A1
Authority
EP
European Patent Office
Prior art keywords
weft
auxiliary
fluid
loom
auxiliary nozzles
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.)
Granted
Application number
EP93810047A
Other languages
German (de)
English (en)
Other versions
EP0554221B1 (fr
Inventor
Kazuo c/o Kabushiki Kaisha Toyoda Kayano
Hironori c/o Kabushiki Kaisha Toyoda Ito
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 EP0554221A1 publication Critical patent/EP0554221A1/fr
Application granted granted Critical
Publication of EP0554221B1 publication Critical patent/EP0554221B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles
    • 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
    • D03D47/3026—Air supply systems
    • D03D47/3053—Arrangements or lay out of air supply systems

Definitions

  • the present invention relates to an apparatus for controlling fluid injection pressure of an auxiliary nozzle in a jet loom and, more specifically, to the above apparatus in a jet loom, having at least one weft detector, a plurality of the auxiliary nozzles, a fluid supply reservoir from which fluid under pressure is supplied to the auxiliary nozzles through lines each having an electromagnetically-operated valve, and a controller for controlling the operation of the valve.
  • the fluid pressure in a fluid supply reservoir is so set that a specific kind of weft, which requires the longest time to fly to the weft feeler, may arrive at the destination within a predetermined period time, and the time at which a solenoid-operated stop pin in a drum type weft measuring device is disengaged from the drum thereof for weft releasing, as well as the times at which main and auxiliary nozzles are activated respectively for fluid injection are controlled according the average arrival time of the leading end of the inserted wefts.
  • This method of controlling the fluid injection pressure of auxiliary nozzles tends to waste fluid and it is practically impossible with this method to recover the flying speed of such weft that has once decelerated or stalled on its way of flying through a warp shed.
  • An attempt to solve the above problems has been made by an apparatus disclosed by Publication of unexamined Japanese patent application No. 62-257441 (1987).
  • This apparatus includes three separate reservoirs holding therein fluids under different pressures and the reservoir from which its fluid is to be supplied to the respective auxiliary nozzles is selectively changed as required in accordance with a signal transmitted from a weft detector so that the weft speed is adjusted on its way of flying through a shed.
  • This conventional apparatus is disadvantageous, however, in that the provision of plural fluid supply reservoirs and their associated conduit lines require additional space for their installation and make the whole apparatus complicated.
  • auxiliary nozzle injection pressure controlling apparatus in a jet loom which can solve the above-identified problems by saving the installation space, as well as fluid consumption of the auxiliary nozzles.
  • an apparatus for controlling the fluid injection pressure of an auxiliary nozzle in a jet loom having at least one weft detector, a plurality of the auxiliary nozzles, a fluid supply reservoir from which fluid under pressure is supplied to the auxiliary nozzles through lines each having a first electromagnetically-operated valve, and a controller for controlling the operation of the valves, the apparatus being characterized in that in that each of the lines is provided with a bypass line having a second electromagnetically-operated valve whose operation may be controlled by the controller for each weft insertion according to the information of time at which each inserted weft has arrived at a predetermined position along weft flying passage in a warp shed of the loom.
  • the valve in the bypass line is caused to open thereby to activate its associated auxiliary nozzle in response to a Signal from any weft detector then detecting a delay in the weft arrival time at a position upstream of the above auxiliary nozzle.
  • each main line may be provided with a plurality of bypass lines through which air streams of different flow rates are flown for effecting two-step acceleration.
  • air through one bypass line is used for the acceleration, while the other bypass line may be arranged so as to supply air under a lower pressure and used in conjunction with the main line for inserting different kinds of weft alternately.
  • FIG. 1 through 4 show embodiments of the present invention and details thereof:
  • a main nozzle 1 of the loom for inserting a weft Y into a warp shed by an air jet issued therefrom.
  • the inserted weft Y is assisted in flying through the shed by air jets injected from groups of auxiliary nozzles 2-6 to accelerate the weft so that the leading end thereof reaches a weft feeler 7 which is located at a predetermined terminating extremity position of weft flying passage beyond the shed across the loom for monitoring the time at which the leading end arrives at that position defined by the weft feeler.
  • Each of the auxiliary nozzle groups 2-6 comprises five nozzles 2a, 2b, 2c, 2d, 2e; 3a-3e; 4a-4e; 5a-5e.
  • Five auxiliary nozzles of each group are connected to a common air distributor 8, 9, 10, 11 or 12, so that the five auxiliary nozzles of each group inject air under the same pressure.
  • the air reservoir 13 located across the loom and holding therein compressed air.
  • the air reservoir 13 has an inlet connected to any suitable air source 15 through a regulator 14 for adjusting the air pressure in the reservoir and outlets connected to the distributors 8-12 of the respective groups of auxiliary nozzles 2-6 through conduit lines 16-20 having fixed throttle valves 21-25 for restricting the flow of air therethrough to the auxiliary nozzles so as to adjust the air injection pressure of the nozzles with respect the air pressure in the reservoir 13.
  • the lines 16-20 include solenoid-operated valves 27-31 and the time at which the solenoids are energized to open their associated valves of each group is controlled by a controller 26.
  • the apparatus includes five weft detectors 32-36 disposed in a warp shed for detecting the time at which the leading end of an inserted weft just arrives at each of such weft detectors and connected to the controller 26 for transmitting thereto signals which are representative of the arrival times of the leading end at the respective weft detectors.
  • the controller 26 is connected also to the weft feeler 7 for receiving therefrom a signal representative of the time at which the leading end of an inserted weft arrives at that weft feeler.
  • the controller 26 is adapted to receive other signals indicative of other information necessary for controlling weft insertion, e.g. air pressure in the reservoir 13 which is detected by a pressure sensor 37 connected to the reservoir.
  • the apparatus according to the invention further includes bypass lines 42-46 connected to bypass the throttle valves 21-25 and the solenoid-operated valves 27-31 in the main lines 16-20.
  • the bypass lines 42-46 have second solenoid-operated valves 3741 whose operation is controlled by the controller 26. Unlike the main lines 16-20, the bypass lines 42-46 have no throttle, thus allowing more air to flow therethrough than through the main lines to the distributors 8-12. In other words, flowing air through the bypass lines 42-46 produces air jets under a higher pressure from the auxiliary nozzles than flowing air through the main lines 16-20 having the air flow restricting throttles 21-25, thus making possible acceleration of a weft flying in a shed.
  • the controller 26 then responding to a signal from that weft detector commands the solenoid for the valve 39 to be energized so that the valve in the bypass line 44 for the group of auxiliary nozzles 4a, 4b, 4c, 4d, 4e is opened. Accordingly, air under the same pressure as the air in the reservoir 13 is allowed through the bypass line 44 and meets at the distributor 29 with air flown through the main line 18 to be supplied together therewith to the auxiliary nozzles 4a, 4b, 4c, 4d, 4e.
  • any appropriate valve of the solenoid-operated valves 37-41 in the bypass lines 42-46 is caused to open so that air flowing through the bypass line meets at the distributor with air flowing through the main line, thereby increasing air injection pressure of the auxiliary nozzles of a group located just downstream of the position where the slowdown of weft flying speed has been detected.
  • the result is that the weft flying speed is accelerated by such increased air injection pressure of the auxiliary nozzles.
  • an increase of the air injection pressure of the auxiliary nozzles for the acceleration may be effected by allowing air to flow only through the bypass line with the main lines closed.
  • FIG. 3 A modified embodiment of the invention is illustrated in FIG. 3, wherein the bypass line, e.g. 42, has an adjustable throttle valve 47 to make possible adjustment of the acceleration which may be required when any different kind of weft is to be handled.
  • FIG. 4 shows a further modified embodiment of the invention which differs from that shown in FIG. 3 in that a second bypass line 48 is added.
  • at least one of the bypass lines 42, 48 has an adjustable throttle valve 47 or 50 which may be adjusted to allow less air flow therethrough than the fixed throttle valve 21 in the main line 16.
  • the bypass line having the adjustable throttle valve may be used for decelerating the weft flying speed with the solenoid-operated valve 27 in the main line 16 then closed.
  • the other bypass line is used for the acceleration as described in the above.
  • FIG. 1 in the arrangement of FIG.
  • the throttle valve 50 may have very little restriction of air flow while the throttle valve 47 slight restriction so that two-step acceleration can be effected by firstly opening the valve 37 and then activating the valve 49 with the former valve 37 closed. It would be understood readily by those skilled in the art that this embodiment of FIG. 4 is applicable to alternate insertion of two different kinds of weft. That is, air through the bypass line 48 is used for the acceleration and the valves 27 and 37 are opened alternately to supply air under different pressures for inserting different kinds of weft accordingly.
  • provision of a line bypassing the main line between the air supply reservoir and the air distributor and having therein a controlled valve can dispense with a plurality of air reservoirs holding air under different pressures. Therefore, the construction of the apparatus can be simplified and requires smaller space for the installation. Additionally, the apparatus of the invention is applicable to insertion of different kinds of weft.
  • weft detectors 32-36 provided in a warp shed may be substituted for other means adapted to detect the leading end of an inserted weft, e.g. a combination of a balloon sensor which is located adjacent a drum type weft measuring device disposed upstream of the main weft inserting nozzle for detecting the balloon in weft releasing from the device and a device which is adapted to figure out the current position of the inserted weft leading end on the basis of weft release signals provided by the balloon sensor.
  • the apparatus is adapted for use in a jet loom and has at least one weft detector 32-36, a plurality of auxiliary nozzles 2a-2e, 3a-3e, 4a-4e. 5a-5e, 6a-6e, a fluid supply reservoir 13 from which fluid under pressure is supplied to each of the auxiliary nozzles 2a-2e, 3a-3e, 4a-4e.
  • conduit lines 16-20 each having a first electromagnetically-operated valves 27-31, and a controller 26 for controlling the operation of the valves 27-31
  • the apparatus includes a second electromagnetically-operated valve 37-41 provided in a bypass line 42-46 bypassing the main line and the operation of the second valve 37-41 is controlled by the controller 26 according to the information of time at which the leading end of each inserted weft Y has arrived at a predetermined position along weft flying passage in a warp shed of the loom.
  • Apparatus for controlling fluid injection pressure of an auxiliary nozzle in a jet loom can be constructed simple and is advantageous in space factor by provision of a line bypassing the main line connected between the air supply reservoir and an auxiliary nozzle, and having therein an electromagnetically-controlled valve whose operation may be controlled by a controller for each weft insertion.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19930810047 1992-01-27 1993-01-26 Appareil pour contrÔler la pression d'injection d'un fluide dans une buse auxiliaire d'un métier à jet Expired - Lifetime EP0554221B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1198292A JPH05230739A (ja) 1992-01-27 1992-01-27 ジェットルームにおけるサブノズルの噴射圧制御装置
JP11982/92 1992-01-27

Publications (2)

Publication Number Publication Date
EP0554221A1 true EP0554221A1 (fr) 1993-08-04
EP0554221B1 EP0554221B1 (fr) 1997-06-11

Family

ID=11792809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930810047 Expired - Lifetime EP0554221B1 (fr) 1992-01-27 1993-01-26 Appareil pour contrÔler la pression d'injection d'un fluide dans une buse auxiliaire d'un métier à jet

Country Status (3)

Country Link
EP (1) EP0554221B1 (fr)
JP (1) JPH05230739A (fr)
DE (1) DE69311386T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786546A1 (fr) * 1996-01-25 1997-07-30 Lindauer Dornier Gesellschaft M.B.H Procédé pour contrÔler le fonctionnement de soupapes magnétiques à contrÔle électrique dans les métiers à tisser
EP0790340A1 (fr) * 1996-02-14 1997-08-20 Tsudakoma Kogyo Kabushiki Kaisha Procédé pour contrÔler l'insertion de trame
US6176272B1 (en) 1998-06-02 2001-01-23 Lindauer Dornier Gesellschaft Mbh Method for monitoring the operation of an electromagnet in a weft prewinder of a weaving loom
KR100414959B1 (ko) * 2000-10-02 2004-01-13 가부시키가이샤 도요다 지도숏키 에어젯 직기의 압축공기 공급장치
CN103114369A (zh) * 2013-01-29 2013-05-22 青岛铠硕纺机有限公司 用于喷气织机的独立供气电子引纬系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5493639B2 (ja) * 2009-09-23 2014-05-14 株式会社豊田自動織機 エアジェットルームにおける緯入れ装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085933A (en) * 1980-10-22 1982-05-06 Rueti Ag Maschf A pneumatic thread-inserting system
EP0238128A2 (fr) * 1986-03-20 1987-09-23 Picanol N.V. Procédé et dispositif pour la commande de tuyères auxiliaires pour l'insertion de la trame
JPS62257441A (ja) * 1986-05-01 1987-11-10 株式会社豊田自動織機製作所 ジェットルームにおける緯入れ方法
EP0465928A1 (fr) * 1990-06-27 1992-01-15 VAMATEX S.p.A. Dispositif pour commander l'alimentation des tuyères transportant le fil de trame le long de la foule d'une machine à tisser à tuyères

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085933A (en) * 1980-10-22 1982-05-06 Rueti Ag Maschf A pneumatic thread-inserting system
EP0238128A2 (fr) * 1986-03-20 1987-09-23 Picanol N.V. Procédé et dispositif pour la commande de tuyères auxiliaires pour l'insertion de la trame
JPS62257441A (ja) * 1986-05-01 1987-11-10 株式会社豊田自動織機製作所 ジェットルームにおける緯入れ方法
EP0465928A1 (fr) * 1990-06-27 1992-01-15 VAMATEX S.p.A. Dispositif pour commander l'alimentation des tuyères transportant le fil de trame le long de la foule d'une machine à tisser à tuyères

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786546A1 (fr) * 1996-01-25 1997-07-30 Lindauer Dornier Gesellschaft M.B.H Procédé pour contrÔler le fonctionnement de soupapes magnétiques à contrÔle électrique dans les métiers à tisser
US5787937A (en) * 1996-01-25 1998-08-04 Lindauer Dornier Gesellschaft Mbh Method for monitoring the proper functioning of electromagnetic air valves in pneumatic looms
EP0790340A1 (fr) * 1996-02-14 1997-08-20 Tsudakoma Kogyo Kabushiki Kaisha Procédé pour contrÔler l'insertion de trame
US5816295A (en) * 1996-02-14 1998-10-06 Tsudakoma Kogyo Kabushiki Kaisha Weft insertion control method
US6176272B1 (en) 1998-06-02 2001-01-23 Lindauer Dornier Gesellschaft Mbh Method for monitoring the operation of an electromagnet in a weft prewinder of a weaving loom
KR100414959B1 (ko) * 2000-10-02 2004-01-13 가부시키가이샤 도요다 지도숏키 에어젯 직기의 압축공기 공급장치
CN103114369A (zh) * 2013-01-29 2013-05-22 青岛铠硕纺机有限公司 用于喷气织机的独立供气电子引纬系统

Also Published As

Publication number Publication date
JPH05230739A (ja) 1993-09-07
DE69311386D1 (de) 1997-07-17
EP0554221B1 (fr) 1997-06-11
DE69311386T2 (de) 1997-11-20

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