EP0466636B1 - Method of operating an electronic dobby loom - Google Patents

Method of operating an electronic dobby loom Download PDF

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Publication number
EP0466636B1
EP0466636B1 EP91810415A EP91810415A EP0466636B1 EP 0466636 B1 EP0466636 B1 EP 0466636B1 EP 91810415 A EP91810415 A EP 91810415A EP 91810415 A EP91810415 A EP 91810415A EP 0466636 B1 EP0466636 B1 EP 0466636B1
Authority
EP
European Patent Office
Prior art keywords
heddle frames
loom
shedding
leveling
heddle
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.)
Expired - Lifetime
Application number
EP91810415A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0466636A1 (en
Inventor
Hiroshi C/O Kabushiki Kaisha Toyoda Honda
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 EP0466636A1 publication Critical patent/EP0466636A1/en
Application granted granted Critical
Publication of EP0466636B1 publication Critical patent/EP0466636B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C17/00—Card-punching apparatus
    • D03C17/06—Card-punching apparatus automatic, i.e. design scanned optically or otherwise to control punching apparatus or to control loom jacquard directly
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions

Definitions

  • the present invention relates to a method of operating an electronic dobby loom and, more particularly, to a method of operating an electronic dobby loom capable of controlling a plurality of heddle frames urged toward a first shedding position according to a program stored in a storage device so that the heddle frames are shifted to a second shedding position or a split shedding position.
  • all the heddle frames are arranged for leveling on a fixed level to facilitate the work for mounting the heddle frames on the loom or for drafting warps through the heddles of the heddle frames.
  • all the heddle frames when all the heddle frames are urged toward a first shedding position for negative shedding, all the hedle frames, in general, are released free so that all the heddle frames are arranged at the first shedding position.
  • the heddle frames must be levelled at a second shedding position opposite the first shedding position or at a split-shedding position. If all the heddle frames are shifted simultaneously in such a case, load on the loom, particularly on the drive motor, is excessively large.
  • the heddle frames are divided, for example, into four groups, i.e., a first group of the first to the fifth heddle frames, a second group of the first to the ninth heddle frames, a third group of the first to the twelfth heddle frames and a fourth group of the first to the sixteenth heddle frames, and the heddle frames are shifted sequentially in four shedding cycles one group of heddle frames in each shedding cycle to reduce load on the drive motor.
  • a technique is disclosed in JP 61 (Sho)-225342.
  • the loom in shifting the heddle frames of an electronic dobby loom to a leveling position for leveling, the loom is operated at a full speed and the power supplied to the drive motor must be increased to operate the loom at a high speed for instantaneous leveling when the drive motor has a capacity insufficient for the simultaneous leveling of all the heddle frames, and then, after leveling all the heddle frames simultaneously, the loom is started at the full speed or at a highest possible speed, because it is possible that a large load acts on the drive motor in shifting the heddle frames from the leveling position to the shedding position.
  • the present invention has been made to solve the foregoing problems and it is therefore an object of the present invention to provide a method of operating an electronic dobby loom in leveling the heddle frames and in starting the loom after leveling the heddle frames, at a safe, low speed without excessively loading the drive motor.
  • the present invention provides a method of operating an electronic dobby loom equipped capable of controlling the shedding motion of a plurality of heddle frames urged toward a first shedding position according to a program previously stored in a storage device so that the heddle frames are shifted to a second shedding position or to a split-shedding position.
  • the heddle frames are shifted in groups of a plurality of heddle frames, and against the force urging the heddle frames toward the first shedding position, to the second shedding position, or to the split-shedding position in a plurality of shedding cycles one group of heddle frames in each shedding cycle in leveling the heddle frames and in starting the loom.
  • the heddle frames are shifted in a plurality of groups in a plurality of picking cycles in shifting the heddle frames against force urging the heddle frames in a direction opposite to the shifting direction. Accordingly, the drive motor of the loom is not excessively loaded, the loom can be operated at a low speed for leveling and the loom can be started at a low staring speed, so that the warps are not broken.
  • Follwing the method of operating an electronic dobby loom capable of controlling the shedding motion of a plurality of heddle frames according to a program and sequence previously stored in a storage device, the required and slected heddle frames are shifted against the force urging the same in groups each of a plurality of heddle frames, in a plurality of shedding cycles, thereby leveling the heddle frames and staring the loom.
  • the drive motor is not loaded excessively when the number of heddle frames to be shifted simultaneously in each shedding cycle is determined previously taking into consideration the capacity of the drive motor, so that the loom can be operated at a comparatively low speed. Since the heddle frames are controlled selectively and individually for shedding motion, the heddle frames can be shifted from the leveling position respectively to shedding positions corresponding to the weave (pattern/design) of a fabric to be woven on the loom, the loom can be started at a comparatively low speed, and hence the frequency of warp breakage when starting the loom can significantly be reduced compared with the frequency of warp breakage in starting the loom by the conventional method.
  • a loom 1 is provided with a drive motor M and a dobby 2 of a known type.
  • the dobby 2 comprises components, not shown, such as cams, links and solenoids.
  • Ropes 4 are extended through guide rollers 3 between heddle frames 5 and swing levers, not shown.
  • Each rope 4 has one end connected to the heddle frame 5 and the other end connected to the free end of the swing lever.
  • the swing levers are attracted to the corresponding solenoids, the corresponding heddle frames 5 are pulled down by the ropes 4.
  • the number of the heddle frames 5 is in the range of sixteen to thirty-two.
  • the heddle frames 5 excluding those operated in common are urged through flexible members 6 and sectorial swing levers 7 by springs 8 to an upper shedding position. Accordingly, while the solenoids of the dobby 2 are in an off state, namely, solenoids 2 are not energized and the swing levers are not attracted to the solenoids, the heddle frames 5 are at the upper shedding position. Therefore, an open shed is formed by energizing some of the solenoids to pull down the corresponding heddle frames 5.
  • a shedding program is designed according to a weave diagram shown in Fig. 2(B).
  • the heddle frames 5 are controlled by the dobby 2 so as to form sheds according to the weave for first to sixth picking cycles.
  • the dobby 2 In shifting the heddle frames 5 for a leveling cycle L, the dobby 2 releases all the heddle frames 5 free and, consequently, all the heddle frames 5 are shifted to the over shed position by the springs 8 for so-called over shed leveling.
  • first to third picking cycles are performed with all the heddle frames 5 released free from the control of the dobby 2 for the leveling cycle L in an up leveling mode. Since the heddle frames 5 are shifted in the urging direction of the springs 8 for the leveling cycle L, the loom is operated at a low speed, namely, in an inching mode, for safety and for avoiding warp breakage without requiring additional power for leveling.
  • Fig. 3(B) shows a weave diagram for controlling the heddle frames 5 in starting the loom for weaving with the heddle frames 5 arranged at the up leveling position. Leveling is completed in a leveling cycle L o . Then, the first to fifth heddle frames 5 are controlled according to the weave diagram for a first picking cyle L1, in which the second, fourth and fifth heddle frames 5 are shifted, the sixth to tenth heddle frames 5 are controlled according to the weave diagram for a second picking cycle L2 without changing the positions of the first to fifth heddle frames 5, the eleventh to sixteenth heddle frames 5 are controlled according to the weave diagram for a third picking cycle L3 without changing the position of the first to tenth heddle frames 5, a fourth picking cycle L4 is performed likewise, and then the operating speed of the loom is raised from the low speed to the normal operating speed for normal weaving operation from a fifth picking cycle.
  • the arrangement of all the heddle frames 5 in the weaving condition is completed through the three picking cycles in
  • Figs. 4(A) and 4(B) show a manner of controlling the heddle frames 5 for leveling after the interruption of weaving operation, namely, after fifth and sixth picking cycles (Fig. 4(B)).
  • the heddle frames of odd numbers are divided into a first group of the first, third, fifth and seventh heddle frames and a second group of the ninth, eleventh, thirteenth and fiftheenth heddle frames.
  • the heddle frames of the first group are shifted down (on) in the first leveling cycle L1
  • the heddle frames of the second group are shifte down (on) in the third leveling cycle L3. Consequently, all the heddle frames are arranged for plain weave in four pcking cycles, in which the loom operates at the low speed.
  • the heddle frames are divided into groups, the groups of heddle frames 5 are shifted down sequentially one group for each picking cycle and held at the lower position. Accordingly, the motor M of the loom 1 is not overloaded even if the motor M is such as for a loom of a tappet shedding system, and the loom 1 can be operated at the low speed in leveling the heddle frames 5 and in staring the loom 1 after leveling.
  • the heddle frames (5) of the loom are selected and assigned to a plurality of groups.
  • a group of heddle frames (5) is moved and leveled into the weaving position (up arrow, down arrow) according to the weaving pattern to be woven.
  • the loom is preferably run at lower speed compared to the selected normal picking speed. This allows for avoiding excessive load of the drive motor and further remarkably reduces warp yarn breakes. The method thus provides for remarkably improved start up conditions of looms.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP91810415A 1990-06-04 1991-05-31 Method of operating an electronic dobby loom Expired - Lifetime EP0466636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP144346/90 1990-06-04
JP2144346A JP2924095B2 (ja) 1990-06-04 1990-06-04 電子ドビー開口装置を備えた織機の運転方法

Publications (2)

Publication Number Publication Date
EP0466636A1 EP0466636A1 (en) 1992-01-15
EP0466636B1 true EP0466636B1 (en) 1995-10-04

Family

ID=15359974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810415A Expired - Lifetime EP0466636B1 (en) 1990-06-04 1991-05-31 Method of operating an electronic dobby loom

Country Status (3)

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EP (1) EP0466636B1 (ja)
JP (1) JP2924095B2 (ja)
DE (1) DE69113545T2 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE470313B (sv) * 1992-06-10 1994-01-17 Aelmhults Bruk Ab Anordning vid vävmaskin innefattande individuellt styrda skaftramar
JP2821095B2 (ja) * 1994-01-24 1998-11-05 大和ハウス工業株式会社 柱・梁接合構造
DE102005023929B3 (de) * 2005-05-24 2006-09-14 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren zum Betreiben einer Projektilwebmaschine
CN104005141B (zh) * 2014-06-13 2015-07-22 丹阳市锦典丝绸工艺品织造有限公司 一种多臂喷水织机的上层综框起综装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61225342A (ja) * 1985-03-25 1986-10-07 株式会社　山田ドビ− レベリング装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1149570B (it) * 1982-02-09 1986-12-03 Fimtessile Dispositivo perfezionato per la ricerca del passo delle macchine di armatura in telai di tessitura
DE3542650A1 (de) * 1985-12-03 1987-06-04 Stromag Maschf Verfahren und vorrichtung zur steuerung und/oder regelung des anfahrvorganges einer webmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61225342A (ja) * 1985-03-25 1986-10-07 株式会社　山田ドビ− レベリング装置

Also Published As

Publication number Publication date
JP2924095B2 (ja) 1999-07-26
EP0466636A1 (en) 1992-01-15
DE69113545T2 (de) 1996-05-15
JPH0441735A (ja) 1992-02-12
DE69113545D1 (de) 1995-11-09

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