EP0879908B1 - Webschaftantriebsvorrichtung - Google Patents

Webschaftantriebsvorrichtung Download PDF

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Publication number
EP0879908B1
EP0879908B1 EP98107260A EP98107260A EP0879908B1 EP 0879908 B1 EP0879908 B1 EP 0879908B1 EP 98107260 A EP98107260 A EP 98107260A EP 98107260 A EP98107260 A EP 98107260A EP 0879908 B1 EP0879908 B1 EP 0879908B1
Authority
EP
European Patent Office
Prior art keywords
driving
heald frame
heald
loom
linear motor
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
EP98107260A
Other languages
English (en)
French (fr)
Other versions
EP0879908A1 (de
Inventor
Tatsuya Uematsu
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
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 Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP0879908A1 publication Critical patent/EP0879908A1/de
Application granted granted Critical
Publication of EP0879908B1 publication Critical patent/EP0879908B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D03C13/02—Shedding mechanisms not otherwise provided for with independent drive motors
    • D03C13/025—Shedding mechanisms not otherwise provided for with independent drive motors with independent frame drives
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0683—Arrangements or means for the linking to the drive system

Definitions

  • the present invention relates to an apparatus for driving heald frames of a loom.
  • a loom on which a piece of silk cloth is woven by spreading mails by vertically moving a plurality of heald frames with many warps threaded through the mails in each heald frame, inserting a woof through the spread warps in the mails, by inserting a shuttle with the woof attached through the warps, and drawing the inserted woof to the front end using a reed.
  • heald frames are normally used in a plain weave loom called a Mihara-kumi loom, a twill weave loom and a satin weave loom, respectively.
  • Simple patterns such as checks, etc. can also be woven by increasing the number of heald frames.
  • a linear motor as shown in Fig. 1.
  • moving elements 12 made of copper or aluminum plate are mounted on the vertical sides of the frames of the heald frame 11, and frame guides 13 are provided to guide these moving elements 12.
  • Stators 15 are mounted at the bottom of grooves 14 in these frame guides 13.
  • the stators 15 are made by stamping out recesses from an electric plate, and a plurality of coils are wound in each recess.
  • a linear motor 16 is composed of the above-mentioned moving elements 12 and stators 15, and the vertical reciprocating movement of the heald frame 11 is controlled by successively providing an excitation current to the plurality of stator coils thereby creating a linear progression of the electro-magnetic fields in the stators 15.
  • the driving control to the linear motor 16 can be corrected when the position of the heald frame 11 is recognized as being outside a predetermined range by an arithmetic circuit 19, based on the main axis angle of the loom detected by the output signal from a loom angle sensor 17 and a base position sensor 18. That is, a linear motor for driving a heald frame is controlled based on the base position detecting signal of the heald frame 11.
  • a large driving force (propulsive force) is required to drive the heald frame.
  • a driving force sufficient to vertically move the heald frame cannot be obtained by a normally used linear motor having a small propulsive force, such as a linear induction motor, linear DC motor, linear synchronous motor, etc.
  • a linear induction motor such as a linear induction motor, linear DC motor, linear synchronous motor, etc.
  • linear motor that has a large driving force such as a linear vibration actuator, linear solenoid, laminated piezo-electric element, etc.
  • linear vibration actuator linear solenoid
  • laminated piezo-electric element etc.
  • these linear motors cannot sufficiently meet the requirements in the stroke of the heald frame.
  • WO 93 25740 A discloses a generic apparatus for driving loom heald frames.
  • This apparatus comprises a plurality of heald frames aligning next to each other in the direction perpendicular to the loom width, a plurality of driving means spaced in the heald frame alignment direction for moving each of the heald frames independently, and a plurality of converting means for transmitting power of the driving means to the heald frames and reciprocating the heald frames, with one end of each of the converting means being connected to one of the heald frames and the other end being connected to one of the driving means.
  • Fig. 2A and Fig. 2B are a front view and a side view, respectively, of the driving apparatus of a loom heald frame in the first embodiment of this invention.
  • the heald frame 21 is composed of four frames as shown in the drawings, and each heald frame 21 is supported by a guide 23 provided in a guide frame 22.
  • Each heald frame 21 is driven by a linear motor 24, and the driving control of the linear motor 24 varies depending on the kind of the linear motor.
  • a connecting lever 26 is used for the transference of the driving force (propulsive force) from the linear motor to the heald frame. That is, one end of the connecting lever 26 is connected to the lower end of the side stay 27 of each heald frame in a rotatable state, and the other end of the connecting lever 26 is connected to the driving axis 24' of the linear motor in a rotatable state.
  • This connecting lever 26 can be freely rotated about a fulcrum 26a at its center, and the driving axis 24' of the linear motor, the connecting lever 26 and the heald frame 21 are so structured that the principle of a lever and a fulcrum may be utilized.
  • Fig. 3 is a top view of the above-mentioned driving apparatus.
  • each heald frame is provided with a linear motor 24 on each side of the frame, and the two linear motors for each heald frame are connected to the left and right side stays 27 of each heald frame. That is, any of the four heald frames 21 are provided with two linear motors 24 connected to the left and right sides.
  • the four heald frames 21 are so structured that the width of each frame may become narrower as the heald frames 21 go away from the linear motors 24, and are so arranged that the connecting levers 26 mounted on each side of each of the heald frames 21 may not interfere with each other. Since the connecting levers 26 corresponding to the four heald frames 21 have the same length, each of the linear motors 24 are arranged in suitable positions, one staggered behind the other successively.
  • a linear induction motor is used for the linear motor 24 of this embodiment.
  • This linear induction motor is a linear motor with a long stroke and a small propulsive force.
  • a coil is formed as the stator of the primary side of the linear motor 24, for example, to generate eddy currents in the moving element of the secondary side, formed of a magnetic material, to drive the moving element in the direction of the progressive magnetic field, by passing an electric current through the coil.
  • This moving element is the above-mentioned driving axis 24', and by passing a current through the coil, the driving axis is driven in the direction of the progressive magnetic field, shown by the arrows a and b in Fig. 4.
  • a loom is supplied with power to make the loom enter a driving state, and the heald frame 21 is vertically driven by controlling the supply of current to the primary side coil of the linear motor 24.
  • the driving axis 24' is driven upward by passing a current through the coil of the linear motor 24 to generate a progressive magnetic field in the direction of the arrow a as shown in Fig. 4, and correspondingly the heald frame 21 is shifted downward (in the direction of the arrow A) by the driving action of the connecting lever 26 (about the fulcrum 26a).
  • the driving axis 24' is driven downward by generating a progressive magnetic field in the direction of the arrow b as shown in Fig.
  • the driving force for driving the heald frame 21 against the driving force of the linear motor 24 is proportional to the ratio of the length (L2) of the lever from the fulcrum 26a to the joint 29, to the length (L1) of the lever from the fulcrum 26a to the joint 28.
  • the driving force of the linear motor is multiplied tenfold, and the heald frame 21 can be alternately driven in the directions of the arrows A and B by a driving force ten times the original driving force of the linear motor 24.
  • a linear induction motor is used for the linear motor 24
  • another linear motor with a long stroke and a small propulsive force for example, such as a linear DC motor, linear synchronous motor, linear pulse motor, etc. can also be used.
  • L1/L2 is set to "1/10"
  • L1/L2 can be freely set depending on the propulsive force of the linear motor 24 and the weight and required stroke length of the heald frame 21.
  • FIG.5 explains the driving apparatus of a loom heald frame of this embodiment
  • the drawing shows a configuration in the case where the driving apparatus drives one heald frame, and the heald frame is provided with two linear motors 30 on its left and right sides.
  • a heald frame assembly is composed of four frames, and each heald frame is provided with two linear motors.
  • the configuration of the heald frame 21, guide frame 22, guide 23 and side stay 27 to be used in this embodiment is the same as the configuration shown in the above-mentioned Figs.2 and 3, the structure of the connecting lever 26, that is, the position of the fulcrum 26a of the connecting lever 26 is different.
  • the kind of linear motor to be used is also different.
  • the fulcrum 26a of the connecting lever 26 is so structured that the length (L1) from the fulcrum 26a to the joint 28 may be longer than the length (L2) from the fulcrum 26a to the joint 29. That is, the fulcrum 26a is so located that L1 > L2.
  • a linear motor 30 with a large propulsive force and a short stroke is used for the linear motor.
  • a linear vibration actuator is used in this embodiment.
  • This linear vibration actuator has a stator coil that is supplied with an alternating voltage of a sine wave or rectangular wave form, to make the driving axis 30' perform reciprocating motion with a large propulsive force at certain intervals.
  • the driving axis 30' is driven in the direction of the arrow a (upward) by supplying a voltage to the coil of the linear motor 30, and the heald frame 21 is shifted downward (in the direction of the arrow A) through the action of the connecting lever 26 (about the fulcrum 26a). Then, conversely, the driving axis 30' is driven in the direction of the arrow b (downward), and the heald frame 21 is shifted upward (in the direction of the arrow B ) through the action of the connecting lever 26, and by repeating the above-mentioned processes successively, the heald frame 21 is vertically driven.
  • the driving force for driving the heald frame 21 is sufficiently large.
  • the stroke of the heald frame can also be made sufficiently long according to the mechanical advantage of the connecting lever 26.
  • the heald frame 21 can be vertically driven with a stroke ten times the stroke of the linear motor 30, by setting the ratio (L1/L2) of the length (L1) from the fulcrum 26a to the joint 28 to the length (L2) from the fulcrum 26a to the joint 29, to "10/1".
  • the heald frame can be driven with a sufficiently long stroke.
  • a linear vibration actuator is used for the linear motor 30
  • another linear motor with a large propulsive force and a short stroke for example, such as a linear solenoid, laminated piezo-electric element, etc. can also be used.
  • L1/L2 is set to "10/1"
  • L1/L2 can be freely set depending on the propulsive force of the linear motor 30 and the weight and required stroke length of the heald frame.
  • a heavy heald frame can be driven by linear motors with a sufficiently large driving force and a sufficiently long stroke.
  • the present invention relates to an apparatus for driving a heald frame of a loom, and particularly, it is an object of the present invention to provide an apparatus for driving a loom heald frame using a linear motor having a sufficiently large driving force and being capable of securing a sufficiently long driving stroke.
  • a heald frame 21 is driven vertically along a guide 23 by the driving force of a linear motor 24 transferred through a connecting lever 26.
  • a connecting lever 26 and the fulcrum 26a By utilizing the principle of a lever and fulcrum, using a connecting lever 26 and the fulcrum 26a, a large driving force is obtained by using a linear motor with a long stroke, or a long stroke necessary to drive the heald frame is obtained by using a linear motor with a large driving force.
  • the heald frame 21 can be vertically driven by a sufficiently large driving force and a sufficiently long stroke.

Landscapes

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

Claims (3)

  1. Gerät zum Antreiben von Webstuhlschaftrahmen mit:
    einer Vielzahl Schaftrahmen (21), die hintereinander in einer senkrechten Richtung bezüglich der Webstuhlbreite aufgereiht sind,
    einer Vielzahl Antriebseinrichtungen (24, 24'; 30, 30'), die Linearmotoren sind, welche hintereinander in der Schaftrahmenaufreihungsrichtung versetzt zum unabhängigen Bewegen der jeweiligen Schaftrahmen (21) angeordnet sind, und
    einer Vielzahl Wandlereinrichtungen (26, 26a, 28, 29), die Verbindungshebel (26) aufweisen, um eine Leistung von den Antriebseinrichtungen (24, 24'; 30, 30') zu den Schaftrahmen (21) zu übertragen und um die Schaftrahmen (21) hin- und her zu bewegen,
       wobei ein Ende eines jeweiligen Verbindungshebels (26) mit einem Steg (27) von einem der Schaftrahmen (21) verbunden ist, und wobei das andere Ende mit einer der Antriebseinrichtungen (24, 24'; 30, 30') verbunden ist,
    dadurch gekennzeichnet, dass
    die Verbindungshebel (26) senkrecht bezüglich der Webstuhlbreitenrichtung angeordnet sind, und
       die Wandlereinrichtungen (26, 26a, 28, 29) insbesondere nebeneinander in der Webstuhlbreitenrichtung räumlich beabstandet angeordnet sind, so dass sich die Verbindungshebel (26) nicht gegenseitig überlappen können.
  2. Gerät zum Antreiben von Webstuhlschaftrahmen gemäß Anspruch 1,
    wobei die Wandlereinrichtungen (26, 26a, 28, 29) innerhalb der Breite zum Aufnehmen der Schaftrahmen angeordnet sind.
  3. Gerät zum Antreiben von Webstuhlschaftrahmen gemäß Anspruch 1,
    wobei die Antriebseinrichtungen (24, 24a'; 30, 30') so angeordnet sind, dass sie sowohl in der Schaftrahmenaufreihungsrichtung als auch in der Schaftrahmenbreitenrichtung ausgerichtet sind.
EP98107260A 1997-04-22 1998-04-21 Webschaftantriebsvorrichtung Expired - Lifetime EP0879908B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP104677/97 1997-04-22
JP10467797A JP3713886B2 (ja) 1997-04-22 1997-04-22 織機綜絖枠の駆動装置
JP10467797 1997-04-22

Publications (2)

Publication Number Publication Date
EP0879908A1 EP0879908A1 (de) 1998-11-25
EP0879908B1 true EP0879908B1 (de) 2003-07-02

Family

ID=14387110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107260A Expired - Lifetime EP0879908B1 (de) 1997-04-22 1998-04-21 Webschaftantriebsvorrichtung

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EP (1) EP0879908B1 (de)
JP (1) JP3713886B2 (de)
DE (1) DE69815944T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795434B1 (fr) * 1999-06-25 2001-08-10 Staubli Sa Ets Procede et dispositif de positionnement des fils de chaine d'un metier a tisser et metier a tisser equipe d'un tel dispositif
DE10111017B4 (de) * 2001-03-07 2006-02-02 Lindauer Dornier Gmbh Antrieb für die Webschäfte einer Webmaschine
ATE335874T1 (de) * 2004-03-02 2006-09-15 Promatech Spa Webmaschine mit motorgetriebenen webschäften
DE102006059879A1 (de) 2006-12-19 2008-07-03 GÖRGENS, Detlef Webmaschine mit Direktantrieb für Schäfte und Weblade (D03C)
CN101922076B (zh) * 2009-06-12 2012-08-15 赵斯伟 织机开口装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS157292B1 (de) * 1972-01-20 1974-09-16
JPS59192749A (ja) * 1983-04-11 1984-11-01 株式会社豊田自動織機製作所 織機の開口装置
CS239001B1 (en) * 1983-06-27 1985-12-16 Zdenek Rambousek Plain weave shed forming device
GB8817765D0 (en) * 1988-07-26 1988-09-01 Palmer R L Loom control
SE470313B (sv) * 1992-06-10 1994-01-17 Aelmhults Bruk Ab Anordning vid vävmaskin innefattande individuellt styrda skaftramar
DE29618645U1 (de) * 1996-10-25 1997-01-02 Schneider & Ozga, 95463 Bindlach Schaftmaschine

Also Published As

Publication number Publication date
JPH10298844A (ja) 1998-11-10
DE69815944T2 (de) 2004-05-27
JP3713886B2 (ja) 2005-11-09
DE69815944D1 (de) 2003-08-07
EP0879908A1 (de) 1998-11-25

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