EP0864678A1 - Verfahren und Vorrichtung zum Schussfadeneintrag für Greiferwebmaschinen - Google Patents

Verfahren und Vorrichtung zum Schussfadeneintrag für Greiferwebmaschinen Download PDF

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Publication number
EP0864678A1
EP0864678A1 EP98105886A EP98105886A EP0864678A1 EP 0864678 A1 EP0864678 A1 EP 0864678A1 EP 98105886 A EP98105886 A EP 98105886A EP 98105886 A EP98105886 A EP 98105886A EP 0864678 A1 EP0864678 A1 EP 0864678A1
Authority
EP
European Patent Office
Prior art keywords
weft
movable
gripper
rapier head
feeding
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.)
Withdrawn
Application number
EP98105886A
Other languages
English (en)
French (fr)
Inventor
Masami Shinbara
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
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 Toyota Industries Corp, Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyota Industries Corp
Publication of EP0864678A1 publication Critical patent/EP0864678A1/de
Withdrawn legal-status Critical Current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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/04—Auxiliary apparatus combined with or associated with looms for treating weft

Definitions

  • the present invention generally relates to a rapier loom for weaving fabric by inserting a deft into a shed defined between warps by using at least one rapier head moved reciprocatively through the shed. More particularly, the present invention is concerned with a weft insertion method and an apparatus for carrying out the same for a rapier loom of the type mentioned above,
  • Each of the feeding rapier head and the receiving rapier head is constituted by a combination of a stationary gripper member and a movable gripper member.
  • the latter is positioned to a mid position substantially corresponding to a center of the fabric being woven as viewed in the widthwise direction thereof in a standby state in which the associated gripper members are opened.
  • the feeding rapier head releases the weft at the mid position mentioned above.
  • the weft as released is then gripped by the receiving rapier head.
  • the weft transfer between the feeding rapier head and the receiving rapier head has been accomplished.
  • the above-mentioned opening/closing operation of the rapier heads at the mid position of the fabric as viewed in the direction widthwise thereof is executed by a pair of levers constituting parts of a clamp opener disposed underneath the fabric. More specifically, the clamp opener is driven by a servo-motor which is controlled in conformance with movements of both the rapier heads, each of which is also adapted to be driven by a servo-motor.
  • a driving system for driving controllably the clamp opener and the rapier heads is adopted for the purpose of realizing the weft transfer from the feeding rapier head to the receiving rapier head while avoiding the possibility of injuring or damaging the weft.
  • the levers of the clamp opener for opening and closing the rapier heads are so arranged as to enter the inter-warp shed space from the underside of the lower warp layer by pushing aside the individual warps.
  • This motion of the clamp opener levers is carried out once for every weft insertion shot or cycle.
  • the present invention is directed to a rapier loom for weaving a fabric by inserting a weft through a shed formed by warps by using at least one rapier head constituted by a combination of a stationary gripper member and a movable gripper member into said shed.
  • a weft insertion method which features that the aforementioned movable gripper member is so implemented as to respond to a magnetic force of a magnetic force exerting means to thereby assume selectively a weft grip position and a weft release position, that the magnetic force exerting means is changed over between a first state in which the magnetic force exerting means exerts a magnetic force to the movable gripper member and a second state in which the magnetic force exerting means exerts no magnetic force to the movable gripper member, and that the movable gripper member is positionally changed over between the weft grip position and the weft release position by switching the magnetic force exerting means between the first state and the second state mentioned above, wherein the weft is gripped by the movable gripper member when the movable gripper member is changed over from the weft release position to the weft grip position, while the weft is released when the movable gripper member is
  • the movable gripper member is disposed at the weft grip position when the magnetic force of the magnetic force exerting means does not act on the movable gripper member, while the magnetic force of the magnetic force exerting means acts on the movable gripper member, the latter is disposed at the weft release position.
  • the movable gripper member is displaced (i.e., positionally changed over) to the weft grip position from the weft release position.
  • the weft is gripped between the stationary gripper member and the movable gripper member.
  • the movable gripper member is displaced to the weft release position from the weft grip position.
  • the weft is released from the state gripped or grasped between the stationary gripper member and the movable gripper member.
  • the latter Upon transfer of the weft from the feeding rapier head to the receiving rapier head, the latter waits for arrival of the receiving rapier head at a weft transfer position, e.g. at a mid position as viewed in the direction widthwise of the fabric being woven, while the movable gripper member of the receiving rapier head is disposed at the weft release position.
  • the movable gripper member of the receiving rapier head Upon arrival of the feeding rapier head gripping the weft at the weft transfer position, the movable gripper member of the receiving rapier head is caused to assume the weft grip position, whereupon the weft is gripped by the receiving rapier head, while the movable gripper member of the feeding rapier head is positioned at the weft release position, whereupon the weft gets rid of the ⁇ gripping action of the feeding rapier head.
  • a weft insertion method which features that the movable gripper member is so implemented as to be responsive to a magnetic force of electromagnetic means to thereby assume selectively a weft grip position and a weft release position, and that the electromagnetic means is changed over between a first state in which the electromagnetic means exerts a magnetic force to the movable gripper member and a second state in which the electromagnetic means exerts no magnetic force to the movable gripper member, wherein upon application of the magnetic force, the electromagnetic means is first applied with an over-excitation voltage, which is then followed by application of a rated voltage.
  • the movable gripper member is positionally changed over between a weft grip position and a weft release position by switching the electromagnetic means between the first and second states mentioned above.
  • the weft is gripped by the movable gripper member by positionally switching the movable gripper member from the weft release position to the weft grip position, while the weft is released when the movable gripper member is changed over to the weft release position from the weft grip position.
  • the over-excitation voltage is first applied to the electromagnet upon application of the magnetic force thereof to the movable gripper member, which is then followed by application of the rated voltage. Due to application of the over-excitation voltage, the positional change-over of the movable gripper member from the weft grip position to the weft release position is performed rapidly, whereby the loom can be operated at an increased speed, to an advantage.
  • the present invention is also directed to be a rapier loom for weaving a fabric by inserting a weft through a shed formed between warp layers by inserting at least one rapier head constituted by a combination of a stationary gripper member and a movable gripper member into the shed, wherein a piezoelectric device is interposed between the stationary gripper member and the movable gripper member.
  • a weft insertion method which features that the piezoelectric device is switched between a first state in which a voltage is applied to the piezoelectric device and a second state in which no voltage is applied to the piezoelectric device, that the movable gripper member is positionally changed over between a weft grip position and a weft release position by switching the piezoelectric device between the first and second states mentioned above, and that the weft is gripped by the movable gripper member when it is changed over from the weft release position to the weft grip position, while the weft is released by positionally changing over the movable gripper member to the weft release position from the weft grip position.
  • the piezoelectric device undergoes contraction and expansion in response to application of a voltage thereto and clearing thereof.
  • the positional change-over of the movable gripper member between the weft grip position and the weft release position can controllably be carried out.
  • a weft inserting apparatus for the rapier loom described hereinbefore which apparatus features that the movable gripper member is at least partially composed of a magnetic force responsive portion, and that a magnetic force exerting means is installed at a position in the vicinity of the weft insertion path, wherein the movable gripper member is exchangeably positioned between a weft grip position and a weft release position by switching the state of the magnetic force exerting means between a first state in which magnetic force of the a magnetic force exerting means acts on the magnetic force responsive portion of the movable gripper member and a second state in which the magnetic force of the magnetic force exerting means does not act on the magnetic force responsive portion.
  • a weft inserting apparatus which features that it is comprised of a first magnetic force responsive member constituting at least a portion of the movable feeding gripper, a second magnetic force responsive member constituting at least a portion of the movable receiving gripper, a feeding magnetic force exerting means disposed in the vicinity of a weft insertion dead center point located on a weft insertion path of the feeding rapier head, a receiving magnetic force exerting
  • a plurality of the feeding magnetic force exerting means may be disposed in series to one another along the weft insertion path of the feeding rapier head.
  • a plurality of the receiving magnetic force exerting means may be disposed in series to one another along the weft insertion path of the receiving rapier head.
  • the feeding rapier head undergoes sequentially the magnetic actions exerted by a plurality of feeding magnetic force exerting means disposed in series along the weft insertion path, while the receiving rapier head equally undergoes sequentially the magnetic actions of plural receiving magnetic force exerting means disposed serially along the weft insertion path.
  • the magnetic force exerting means may be constituted by at least one electromagnet
  • the weft inserting apparatus may further include a voltage application control means for controlling application of a voltage to the electromagnet, an applied voltage level setting means for setting a level of voltage applied to the electromagnet, a voltage application timing setting means for setting a timing at which the voltage is applied to the electromagnet.
  • the timings at which the voltage is applied to the electromagnet is set at the voltage application timing setting means, while the voltage application control means commands the voltage application timings on the basis of the data set at the voltage application timing setting means.
  • the voltage level setting means serves for setting the level of voltage to be applied at the preset timings.
  • the voltage application timing control means as well as the timing/level setting means may be implemented in the form of, for example, a microcomputer.
  • a buffer sheet of a soft material may be interposed between the magnetic force exerting means and the movable gripper member such that upon positioning of the movable gripper member at the weft release position, the weft is gripped between the buffer sheet and the movable gripper member.
  • a rapier loom for weaving a fabric by inserting a weft through a shed formed by layers of warps by inserting at least one rapier head constituted by a combination of a stationary gripper member and a movable gripper member into the shed, a weft inserting apparatus which features that a piezoelectric device for driving the movable gripper member is interposed between the movable gripper member and the stationary gripper member, and that the movable gripper member is positionally changed over between a weft grip position and a weft release position by switching the piezoelectric device between a first state in which a voltage is applied thereto and a second state in which no voltage is applied thereto.
  • changes in the length of the piezoelectric stack means in response to application of a voltage and removal thereof is made use of for positionally changing over the movable gripper member between the weft grip position and the weft release position.
  • the change-over mechanism as well as the controller to this end can be implemented inexpensively in a simplified structure while ensuring high reliability for the operation of the weft inserting apparatus and hence that of the rapier loom.
  • a weft insertion apparatus for a rapier loom according to a first embodiment of the present invention will be described by reference to Figs. 1 to 4, in which a reference numeral 1 denotes a feeding rapier head which is adapted to be inserted into a shed defined between layers of warps (not shown) from a weft insertion starting side, and a numeral 2 denotes a receiving rapier head which is adapted to be inserted into the shed from a weft insertion end or terminal side.
  • the feeding rapier head 1 and the receiving rapier head 2 are fixedly mounted at both tip end portions of rapier bands 3 and 4 which are wound around rapier wheels 5 and 6, respectively.
  • the rapier wheels 5 and 6 are reciprocatively rotated in the directions opposite to each other. More specifically, the feeding rapier head 1 is inserted into the inter-warp shed upon forward rotation (i.e., rotation in a given one direction) of the rapier wheel 5, while the feeding rapier head 1 is retracted from the shed upon backward rotation (i.e., rotation in the direction opposite to the given one direction) of the rapier wheel 5. On the other hand, the receiving rapier head 2 is inserted into the shed defined by the warps upon forward rotation of the rapier wheel 6, while it is retracted upon backward rotation thereof.
  • the feeding rapier head 1 is constituted by a combination of a stationary feeding gripper 7 made of a non-magnetic material and a movable feeding gripper 8 of a magnetic material.
  • the stationary feeding gripper 7 is integrally formed with a supporting member 7a, a gripping surface 7b and a position limiting member 7c.
  • Fixedly mounted on the supporting member 7a are the movable feeding gripper 8, a tip end portion of the rapier band 3 and a leaf spring 9 by means of clamping screws 10.
  • the movable feeding gripper 8 is made of a metal material having a resiliency so as to serve as a spring.
  • a gripping surface 8a is formed at a tip end portion of the movable feeding gripper 8.
  • the gripping surfaces 7b and 8a are adapted to be detachably brought into contact with each other.
  • the position limiting member 7c serves to restrict or limit the downward displacement of the movable feeding gripper 8.
  • the receiving rapier head 2 is constituted by a combination of a stationary receiving gripper 11 made of a nonmagnetic material and a movable receiving gripper 12 of a magnetic material. Coupled rotatably or swingably to the stationary receiving gripper 11 is the movable receiving gripper 12 by means of a pivot 13.
  • the movable receiving gripper 12 is made of a metal material. Formed at tip end portions of the stationary receiving gripper 11 and the movable receiving gripper 12, respectively, are gripping surfaces 11a and 12a facing oppositely to each other, The gripping surfaces 11a and 12a are adapted to be detachably brought into contact with each other.
  • a tip end portion of the rapier band 4 is fixedly mounted on the movable receiving gripper 12 by means of clamping screws 14.
  • the stationary receiving gripper 11 is integrally formed with a supporting member 11b and a position limiting member 11c.
  • a compression spring 15 is interposed between the supporting member 11b and the movable receiving gripper 12.
  • the position limiting member 11c serves as a stopper for limiting a downward movement of the movable receiving gripper 12.
  • the feeding rapier head 1 and the receiving rapier head 2 are caused to move into the inter-warp shed upon forward rotations of the rapier wheels 5 and 6, respectively, and encounter each other at a mid position as viewed in the widthwise direction of a fabric being woven.
  • the feeding rapier head 1 and the receiving rapier head 2 are caused to retract from the shed defined by the layers of warps.
  • the position of the feeding rapier head 1 shown in Fig. 1 represents a position distanced at maximum from the inter-warp shed. This position will be referred to as the retraction dead center point or position.
  • the state of the receiving rapier head 2 shown in Fig. 1 represents a position distanced maximally from the inter-warp shed. This position will be referred to as the retraction dead center position of the receiving rapier head 2.
  • the receiving rapier head 2 is adapted to run on and along a slay 17 which supports a reed 16.
  • the running path of the receiving rapier head 2 i.e., the weft insertion path, is so designed or determined as not to interface with the reed 16 when it is retracted farthest from the cloth fell of the fabric being woven.
  • electromagnets 18 and 19 are mounted at both end or terminal portions, respectively, of the sley 17. More specifically, the electromagnet 18 is installed at a position immediately below the weft insertion path for the feeding rapier head 1, while the electromagnet 19 is installed at a position immediately underneath the weft insertion path of the receiving rapier head 2.
  • a pair of electromagnets 20 and 21 are embedded in the sley 17 substantially at mid portions thereof, respectively.
  • the electromagnet 20 is installed at a position immediately below the weft insertion path of the feeding rapier head 1, while the electromagnet 21 is disposed immediately beneath the weft insertion path of the receiving rapier head 2.
  • a magnetic-field region over which the magnetic force of the electromagnet 18 is active lies in the vicinity of the retraction dead center position of the feeding rapier head 1, while a corresponding region of the electromagnet 19 lies in the vicinity of the retraction dead center position of the receiving rapier head 2.
  • the magnetic-field region of the electromagnet 20 lies in the vicinity of the position at which the feeding rapier head 1 encounters the receiving rapier head 2, i.e., a so-called weft insertion dead center position of the feeding rapier head 1.
  • the magnetic-field region of the electromagnet 21 lies in the vicinity of the position at which the receiving rapier head 2 encounters the feeding rapier head 1, i.e., the weft insertion dead center position of the receiving rapier head 2.
  • the magnetic force of the electromagnet 18 acts on the movable feeding gripper 8 of the feeding rapier head 1 located in the vicinity of the retraction dead center position, while that of the electromagnet 20 acts on the movable feeding gripper 8 of the feeding rapier head 1 located in the vicinity of the weft insertion dead center position.
  • the magnetic force of the electromagnet 21 acts on the movable receiving gripper 12 of the receiving rapier head 2 located in the vicinity of the weft insertion dead center position thereof.
  • the movable feeding gripper 8 Under the influence of the magnetic forces of the electromagnets 18 and 20, the movable feeding gripper 8 is caused to bend or angularly move toward the electromagnets 18 and 20 around a fulcrum defined by the supporting member 7a against their own resiliences and that of the leaf spring 9. Due to this angular displacement, the movable feeding gripper 8 is positionally changed over to a weft release position shown in Fig. 3 from a weft grip position shown Fig. 2. The downward movement of the movable feeding gripper 8 is limited by the position limiting member 7c. In the state where the downward movement of the movable feeding gripper 8 is stopped by the position limiting member 7c, the movable feeding gripper 8 assumes a position closest to the electromagnet 18 or 20. However, the warps are positively prevented from being sandwiched between the movable feeding gripper 8 and the electromagnet 18; 20 and thus protected against any injury.
  • the movable receiving gripper 12 is caused to bend or angularly move toward the electromagnets 19 and 21 around the pivot pin 13 against the spring force of the compression spring 15. Due to this angular displacement, the movable receiving gripper 12 is positionally changed over to a weft release position shown in Fig. 3 from a weft grip position shown Fig. 2.
  • the downward movement of the movable receiving gripper 12 is limited by the stopper or position limiting member 11c. In the state where the downward movement of the movable receiving gripper 12 is limited by the position limiting member 11c, the movable receiving gripper 12 assumes a position closest to the electromagnet 19 or 21. However, the warps are positively prevented from being sandwiched between the movable receiving gripper 12 and the electromagnet 19; 21 and thus protected against any injury.
  • the electromagnets 18, 19, 20 and 21 which serve as magnetic force exerting means are electrically energized through the driving circuits 22, 23, 24 and 25, respectively, under the control of a control computer C.
  • the driving circuits 22 to 25 serving as applied voltage setting means apply a rated voltage V 0 to the electromagnets 18, 19, 20, 21, respectively.
  • the control computer (or computerized controller, to say in another way) C serving as the voltage application control means is equipped with a voltage application timing setting unit 27 and a rotary encoder 28.
  • the voltage application timing setting unit 27 serves for inputting to the control computer C the voltage application timing control signals for the electromagnets 18 to 21, respectively.
  • the rotary encoder 28 serves for detecting rotational angles or angular positions of the loom.
  • the control computer C issues commands to the driving circuits 22 to 25 applications of the rated voltage V 0 , in response to which the driving circuits 22 to 25 apply the rated voltage V 0 to the electromagnets 18 to 21 at the preset timings, respectively.
  • a waveform D 1 represents an amplitude and a timing of a voltage applied to the electromagnet 18, while a waveform D 2 represents an amplitude and a timing of a voltage applied to the electromagnet 19.
  • a waveform E 1 represents an amplitude and a timing of a voltage applied to the electromagnet 20, while a waveform E 2 represents an amplitude and a timing of a voltage applied to the electromagnet 21.
  • the voltage V is taken along the ordinate with a rotation angle (or angular position) ⁇ of the loom being taken along the abscissa.
  • Each of the voltages represented by the waveforms D 1 , D 2 , E 1 and E 2 is a rated voltage V 0 .
  • the timings Td 1 , Td 2 , Te 1 and Te 2 at which the rated voltage V 0 is applied are set by the voltage application timing setting unit 27 to be subsequently inputted to the control computer C.
  • the control computer C issues voltage application commands to the driving circuits 22 to 25 on the basis of the angular position information of the loom as detected by the rotary encoder 28 and the information concerning the voltage application timings Td 1 , Td 2 , Te 1 and Te 2 , as supplied from the timing setting unit 27.
  • the driving circuits 22 to 25 apply the rated voltage V 0 to the electromagnets 18 to 21, respectively.
  • the position of the movable feeding gripper 8 of the feeding rapier head 1 is changed over to the weft release position from the weft grip position.
  • the feeding rapier head 1 then starts the weft insertion in the state in which the movable feeding gripper 8 is disposed at the weft release position.
  • the position of the movable feeding gripper 8 is changed over from the weft release position to the weft grip position in the vicinity of the retraction dead center position.
  • the weft Y is retained between the gripping surfaces 7b and 8a of the feeding grippers 7 and 8, respectively, of the feeding rapier head 1.
  • the feeding rapier head 1 takes up the weft Y at a weft take-up position in the vicinity of the retraction dead center position, whereby the weft Y is inserted into the shed.
  • the electromagnet 18 serves as the weft take-up magnetic means.
  • the receiving rapier head 2 arrives at the weft insertion dead center position in precedence to the feeding rapier head 1.
  • the movable receiving gripper 12 of the receiving rapier head 2 arrived at the weft insertion dead center position is changed over from the weft grip position to the weft release position in response to application of the voltage represented by the waveform E 2 .
  • the receiving rapier head 2 then waits for arrival of the feeding rapier head 1 in the state in which the movable receiving gripper 12 is disposed at the weft release position.
  • the weft Y retained by the feeding rapier head 1 arrived at the weft insertion dead center position is transferred to the receiving rapier head 2 to be thereby positioned between the gripping surfaces 11a and 12a thereof.
  • the voltage application to the electromagnet 21 is interrupted, which results in that the movable receiving gripper 12 is changed over to the weft grip position from the weft release position.
  • the weft Y is now retained between the gripping surfaces 11a and 12a of the receiving rapier head 2, as can be seen in Fig. 3.
  • the movable feeding gripper 18 of the feeding rapier head 1 arrived at the weft insertion dead center position is changed over from the weft grip position to the weft release position in response to application of the voltage represented by the waveform E 1 .
  • the weft Y gets rid of the gripping action of the feeding rapier head 2.
  • the electromagnet 20 serves as the feeding magnetic force exerting means
  • the electromagnet 21 serves as the receiving magnetic force exerting means.
  • both the feeding rapier head 1 and the receiving rapier head 2 are moved backwardly or retracted toward the respective retraction dead center positions, whereby the weft Y held by the receiving rapier head 2 is caused to extend through the inter-warp shed.
  • the movable receiving gripper 12 of the receiving rapier head 2 arrived at the weft release position located immediately before the retraction dead center position is changed over from the weft grip position to the weft release position in response to application of the voltage represented by the waveform D 2 .
  • the weft Y gets rid of the gripping action of the receiving rapier head 2.
  • the electromagnet 21 serves as the weft releasing magnetic force exerting means.
  • the reed 16 starts beating operation from the most retracted position thereof.
  • positions of the movable grippers 8 and 12 of the rapier heads 1 and 2, respectively, are changed over from the weft grip position to the weft release position under the action of the electromagnets 18 to 21.
  • the movable grippers 8 and 12 Upon disappearance of influence of the magnetic force, the movable grippers 8 and 12 are changed over from the weft release position to the weft grip position under the influence of the spring forces.
  • the driving forces for positionally changing over the movable grippers 8 and 12 between the weft grip position and the weft release position are provided by the magnetic forces generated by the electromagnets 18 to 21 and the spring forces of the rapier heads 1 and 2 themselves.
  • the mechanism for positionally changing over the movable grippers 8 and 12 between the weft grip position and the weft release position will never provide interference to the warps, which in turn means that the warps can positively be protected from injury upon operations of the rapier heads 1 and 2.
  • the arrangement for positively actuating the movable grippers 8 and 12 under the action of the magnetic forces makes it possible to ensure the optimal timings for open/close operations of the rapier heads 1 and 2, whereby setting of the optimal timings for the gripping and release operations of the weft Y can be facilitated.
  • easiness in setting the optimal timings for gripping and releasing of the weft Y can ensure reliable taking-up of the weft Y by the feeding rapier head 1 as well as reliable transfer of the weft Y from the feeding rapier head 1 to the receiving rapier head 2.
  • the weft Y may also be caught without opening and closing the feeding rapier head 1.
  • the arrangement that the weft Y is introduced into between the gripping surfaces 7b and 8a in the state where the movable feeding gripper 8 is disposed at the weft release position and then the movable feeding gripper 8 is disposed at the weft grip position is more reliable when compared with the arrangement of catching the weft Y with the feeding rapier head 1 in the closed state thereof.
  • the timing at which the weft Y is released from the feeding rapier head 1 exerts influence to the final insertion posture or state of the weft Y, which in turn affects the quality of the fabric. Besides, easiness of setting the optimal timing for the release of the weft Y from the feeding rapier head 1 contributes to improvement of the fabric quality.
  • the electromagnets 18 and 20 installed on the slay 17 and the movable feeding gripper 8 of the feeding rapier head 1 are positioned mutually very closely every time the magnetic forces of the electromagnets 16 and 20 become active. Thus, the magnetic forces of the electromagnets 18 and 20 can effectively act on the movable feeding gripper 8.
  • the electromagnets 19 and 21 mounted on the slay 17 and the movable receiving gripper 12 of the receiving rapier head 2 are positioned mutually very closely upon activation of the electromagnets 19 and 21. Thus, the magnetic forces of the electromagnets 19 and 21 can effectively act on the movable receiving gripper 12.
  • the movable feeding gripper 8 can be changed over to the weft grip position from the weft release position at a high speed.
  • the spring force of the compression spring 15 it is possible to change over the movable receiving gripper 12 from the weft release position to the weft grip position at a high speed.
  • the resiliency of the movable feeding gripper 8 itself and the spring force of the leaf spring 9 are selected to be sufficiently large for gripping the weft Y without fail.
  • the spring force of the compression spring 15 is set large enough to grip the weft with reliability.
  • the amplitude of the rated voltage V 0 is so selected as to be capable of changing over the movable grippers 8 and 12 from the weft grip position to the weft release position against the spring force mentioned above.
  • the change-over of the movable grippers 8 and 12 between the weft grip position and the weft release position can be effected at a high speed.
  • interposition of the leaf spring 9 in the manner mentioned previously facilitates the setting of the desired spring force.
  • adjustment of the spring force of the leaf spring 9 can easily be realized by changing the number of the leaf springs 9 or the length thereof. It goes without saying that the high-speed positional change-over of the movable grippers 8 and 12 between the weft grip position and the weft release position allows the loom to operate at a high rotation speed.
  • the apparatus for opening and closing the rapier heads 1 and 2 by using the electromagnets 18 to 21 according to the instant embodiment of the present invention can be implemented in a simplified structure of a compact size when compared with the clamp opener apparatus disclosed in JP-A-5-195373 mentioned previously.
  • the lever for opening and closing the rapier head is brought into direct contact with the rapier head. Consequently, both the lever and the rapier head undergo friction and abrasion, which results in error in the opening degree of the rapier head as well as the timings at which it is opened and closed. Besides, heat generated due to the friction impairs the precision of the parts constituting the rapier head.
  • abrasion of the rapier head and deviation of precision of the parts provide obstruction to reliable transfer of the weft Y from the feeding (giver) rapier head to the receiver (taker) rapier head.
  • the movable grippers 8 and 12 are changed over contactless between the weft grip position and the weft release position.
  • the sley in the weft inserting apparatus is divided into three sley members 17a, 17b and 17c at a mid portion as viewed in the direction widthwise of the fabric.
  • the individual sley members 17a, 17b and 17c are supported via sley swords 29 on a rocking shaft 30 (see Fig. 5) which is adapted to be reciprocatively rocked or swung by a reed driving mechanism (not shown).
  • a rocking shaft 30 see Fig. 5
  • electromagnets 18 and 19 are mounted at lateral sides of the sley members 17a and 17c, respectively.
  • An electromagnet 20 is interposed between the sley members 17a and 17b with another electromagnet 21 being interposed between the sley members 17b and 17c.
  • Each of the electromagnets 18 to 21 is supported on a breast beam 32 by way of a bracket 31.
  • the breast beam 32 is employed for supporting a fell plate serving for preventing the downward displacement of a fabric (not shown), a temple device for preventing shrinkage of fabric and an expansion bar, wherein very high accuracy is ensured for the positional relation between the sley 17 and the breast beam 32.
  • the electromagnets 18 to 21 and electric wires therefor are provided fixedly, possibility of breakage of the wires and occurrence of failure in the electromagnets 18 to 21 can positively be suppressed.
  • the sley 17 as a whole can be implemented in light weight, which is very beneficial for increasing the beating operation speed.
  • a movable feeding gripper 8A of the feeding rapier head 1 is comprised of a non-magnetic member 8b and a magnetic member 8c disposed to face in opposition to the electromagnet.
  • a movable receiving gripper 12A of the receiving rapier head 2 is comprised of a non-magnetic member 12b and a magnetic member 12c with the magnetic member 12c positioned to face oppositely to the electromagnet.
  • the non-magnetic members 8b and 12b may preferably be made of a resin material with the magnetic members 8c and 12c being formed of a metal material with a view to implementing the rapier heads 1 and 2 in light weight.
  • a light-weight structure of the rapier heads 1 and 2 is advantageous in that they can be moved or operated with an increased speed.
  • Driving circuits 22A, 23A, 24A and 25A for electrically energizing the electromagnets 18 to 21, respectively, are each designed for outputting either one of the rated voltage V 0 and the over-excitation voltage V 1 in response to a command issued by the control computer C.
  • a waveform D 3 represents an amplitude and a timing of a voltage applied to the electromagnet 18, while a waveform D 4 represents an amplitude and a timing of a voltage applied to the electromagnet 19.
  • a waveform E 3 represents an amplitude and a timing of a voltage applied to the electromagnet 20
  • a waveform E 4 represents an amplitude and a timing of a voltage applied to the electromagnet 21.
  • Each of the voltages represented by the waveforms D 3 , D 4 , E 3 and E 4 has a rated voltage level V 0 and an over-excitation voltage level V 1 .
  • the timings Td 03 , Td 04 , Te 03 and Te 04 at which the rated voltage V 0 is applied as well as the timings Td 13 , Td 14 , Te 13 and Te 14 at which the over-excitation voltage V 1 is applied are set by the voltage application timing setting unit 27 and inputted to the control computer C.
  • the control computer C issues voltage application commands for applying the rated voltage V 0 or the over-excitation voltage V 1 to the driving circuits 22A to 25A on the basis of angular position information of the loom as detected by the rotary encoder 28 and the information concerning the voltage application timings mentioned above.
  • the driving circuits 22A to 25A apply the rated voltage V 0 and the over-excitation voltage V 1 to the electromagnets 18 to 21, respectively, at such timings the illustrated in Fig. 8.
  • the over-excitation voltage V 1 is first applied to the electromagnets 18; 20 and the electromagnets 19; 21.
  • the rated voltage V 0 is applied.
  • the movable grippers 8A and 12A are rapidly changed over to the weft release position from the weft grip position. It is self-explanatory that the rapid change-over of the movable grippers 8A and 12A makes it possible to operate the loom at an increased speed.
  • the movable feeding gripper 8B of the feeding rapier head 1 is comprised of a non-magnetic member 8b and a permanent magnet 8d, wherein the permanent magnet 8d is disposed in opposition to the electromagnet.
  • the movable receiving gripper 12B of the receiving rapier head 2 is composed of a non-magnetic member 12b and a permanent magnet 12d which is disposed in opposition to the electromagnet.
  • the positions at which the electromagnets 18 to 21 are installed are same as those of the weft inserting apparatus described hereinbefore in conjunction with the first embodiment of the invention.
  • the driving circuits 22B, 23B, 24B and 25B for electrically energizing the electromagnets 18 to 21, respectively, are each designed for outputting either one of the rated voltage (+)V 0 of plus polarity and the rated voltage (-)V 0 of minus polarity in response to a command issued by the control computer C.
  • a waveform D 5 represents amplitudes and timings of voltages applied to the electromagnet 18, while a waveform D 6 represents amplitudes and timings of voltages applied to the electromagnet 19.
  • a waveform E 5 represents amplitudes and timings of voltages applied to the electromagnet 20
  • a waveform E 6 represents amplitudes and timings of voltages applied to the electromagnet 21.
  • the timings (+)Td 5 , (+)Td 6 , (+)Te 5 and (+)Te 6 at which the positive rated voltage (+)V 0 is applied as well as the timings (-)Td 5 , (-)Td 6 , (-)Te 5 and (-)Te 6 at which the negative rated voltage (-)V 0 is applied are set by the voltage application timing setting unit 27 to be inputted to the control computer C.
  • the control computer C issues voltage application commands for applying the positive rated voltage (+)V 0 or the negative rated voltage (-)V 0 to the driving circuits 22B to 25B on the basis of angular position information of the loom as obtained from the output of the rotary encoder 28 and the information concerning the voltage application timings mentioned above.
  • the driving circuits 22B to 25B apply the rated voltage (+)V 0 of plus polarity or the rated voltage (-)V 0 of minus polarity to the electromagnets 18 to 21, respectively, at the timings illustrated in Fig. 9.
  • the movable feeding gripper 8B is held at the weft grip position under the resiliency of the movable feeding gripper 8B and the spring force of the leaf spring 9 when no magnetic forces of the electromagnets 18 and 20 are exerted.
  • the movable receiving gripper 12B are held at the weft grip position under the spring force of the compression spring 15 when neither the electromagnet 19 nor the electromagnet 21 are active.
  • the magnetic force as generated upon application of the rated voltage (+)V 0 of plus polarity acts as a magnetic attracting force for the movable grippers 8B and 12B, while the magnetic force generated upon application of the rated voltage (-)V 0 of minus polarity acts as a repulsing magnetic force.
  • the movable gripper 8B or 12B In response to the magnetic attracting force generated upon application of the rated voltage (+)V 0 of plus polarity, the movable gripper 8B or 12B is positionally shifted to the weft release position from the weft grip position. On the other hand, in response to the magnetic repulsing force generated upon application of the rated voltage (-)V 0 of minus polarity, the movable gripper 8B or 12B is shifted to the weft grip position from the weft release position. In this manner, the positional changing-over of the movable grippers 8B and 12B to the weft grip position from the weft release position is effected by electrically energizing the electromagnets 18 to 21 in the manner described above.
  • the movable feeding gripper 8B of the feeding rapier head 1 is comprised of a non-magnetic member 8b and a permanent magnet 8d, wherein the permanent magnet 8d is so disposed as to face in opposition to the electromagnet.
  • the movable receiving gripper 12B of the receiving rapier head 2 is composed of a non-magnetic member 12b and a permanent magnet 12d which is disposed in opposition to the electromagnet.
  • the positions at which the electromagnets 18 to 21 are installed are same as those of the weft inserting apparatus described hereinbefore in conjunction with the first embodiment.
  • the driving circuits 22C, 23C, 24C and 25C for electrically energizing the electromagnets 18 to 21, respectively, are each designed for outputting either one of the rated voltage (+)V 0 of plus polarity, the rated voltage (-)V 0 of minus polarity, the over-excitation voltage (+)V 1 of plus polarity and the over-excitation voltage (-)V 1 of minus polarity in response to a command issued by the control computer C.
  • a waveform D 7 represents amplitudes and timings of voltages applied to the electromagnet 18, while a waveform D 8 represents amplitudes and timings of voltages applied to the electromagnet 19.
  • a waveform E 7 represents amplitudes and timings of voltages applied to the electromagnet 20, while a waveform E 8 represents amplitudes and timings of voltages applied to the electromagnet 21.
  • the timings (+)Td 07 , (+)Td 08 ; (+)Te 07 , (+)Te 08 at which the positive rated voltage (+)V 0 is applied as well as the timings (-)Td 07 , (-)Td 08 ; (-)Te 07 , (-)Te 08 at which the negative rated voltage (-)V 0 is applied are set by the voltage application timing setting unit 27 to be subsequently loaded to the control computer C.
  • timings (+)Td 17 , (+)Td 18 ; (+)Te 17 , (+)Te 18 at which the over-excitation voltage (+)V 1 of plus polarity is applied as well as the timings (-)Td 17 , (-)Td 18 ; (-)Te 17 , (-)Te 18 at which the over-excitation voltage (-)V 1 of minus polarity is applied are preset by the voltage application timing unit 27 and inputted to the control computer C.
  • the control computer C issues voltage application commands for applying the rated voltage (+)V 0 of plus polarity, the rated voltage (-)V 0 of minus polarity, the over-excitation voltage (+)V 1 of plus polarity or the over-excitation voltage (-)V 1 of minus polarity to the driving circuit 22C; 25C on the basis of the angular position information of the loom as obtained from the output of the rotary encoder 28 and the information concerning the voltage application timings mentioned above.
  • the driving circuits 22C to 25C apply selectively the rated voltage (+)V 0 of plus polarity, the rated voltage (-)V 0 of minus polarity, the over-excitation voltage (+)V 1 of plus polarity or the over-excitation voltage (-)V 1 of minus polarity to the electromagnets 18 to 21, respectively, at such timings as illustrated in Fig. 10.
  • the high-speed positional change-over of the movable feeding gripper 8B and the movable receiving gripper 12B from the weft release position to the weft grip position contributes to a high-speed operation of the loom
  • the high-speed operation of the movable feeding gripper 8B for allowing the feeding rapier head 1 to catch the weft is very effective for speeding up the weft insertion starting operation of the feeding rapier head 1.
  • FIG 11 shows a version of the weft inserting apparatus in which the movable grippers 8B and 12B additionally provided with the permanent magnets 8d and 12d are adopted.
  • the over-excitation voltage (+)V 1 of plus polarity is applied first, as is represented by the waveforms D 9 , D 10 , E 9 , E 10 .
  • the movable feeding gripper 8B or the movable receiving gripper 12B is to be changed over from the weft release position to the weft grip position, only the rated voltage (-)V 0 of minus polarity is applied.
  • over-excitation voltage (+)V 1 of plus polarity upon changing-over of the movable feeding gripper 8B or the movable receiving gripper 12B from the weft release position to the weft grip position, resiliency of the movable grippers 8B and 12B as well as the spring forces of the leaf spring 9 and the compression spring 15 can be increased, which in turn enables the movable feeding gripper 8B or the movable receiving gripper 12B to be shifted from the weft release position to the weft grip position at an increased speed.
  • Figs. 12 and 13 the position limiting members 7c and 11c are spared in the stationary grippers 7 and 11 of the rapier heads 1 and 2, respectively.
  • buffer sheets 33 of a soft material such as moquette are secured to the sley 17 and the electromagnets 20 and 21 in the case of the embodiment shown in Fig. 12, while in the apparatus shown in Fig. 13, the buffer sheets 33 are fixedly mounted only on the electromagnets 18 to 21, respectively.
  • the movable feeding gripper 8A (or 8B) and the movable receiving gripper 12A (or 12B) are located at the weft release position, the warps are gripped between the movable gripper 8A (or 8B); 12A (or 12B) and the buffer sheet 33.
  • the buffer sheet 33 functions to prevent the warps sandwiched between the movable gripper 8A (or 8B); 12A (or 12B) and the electromagnet from being injured. It should further be mentioned that omission of the position limiting members 7c and 11c contributes to lightweight implementation of the rapier heads 1 and 2.
  • the moquette for forming the buffer sheet 33 may be made of a sheet material such as of a synthetic resin, woven fabric, leather or the like.
  • a plurality of (three in this case) electromagnets 20A, 20B and 20C are disposed along the weft insertion path in the vicinity of the weft insertion dead center position. Furthermore, a plurality of (three in this case) electromagnets 21A, 21B and 21C are disposed along the weft insertion path in the vicinity of the weft insertion dead center position of the receiving rapier head 2.
  • the electromagnets 20A, 20B and 20C serve as the weft feeding magnetic force exerting means, while the electromagnets 21A, 21B and 21C serve as the weft receiving magnetic force exerting means.
  • the movable grippers of the feeding rapier head 1 the movable feeding gripper 8A or 8B shown in Fig. 7 is employed, while as the movable gripper for the receiving rapier head 2, the movable receiving gripper 12A or 12B is used.
  • a waveform E 11 shown in Fig. 15 indicates an amplitude and application timing of the rated voltage applied to the electromagnet 20A by a driving circuit 24D 1 .
  • a waveform E 12 shown in the same figure indicates an amplitude and application timing of the rated voltage applied to the electromagnet 20B by a driving circuit 24D 2 .
  • a waveform E 13 indicates a magnitude and application timing of the rated voltage applied to the electromagnet 20C by a driving circuit 24D 3
  • a waveform E 14 indicates a magnitude and application timing of the rated voltage applied to the electromagnet 21A by a driving circuit 25E 1 .
  • a waveform E 15 indicates a magnitude and application timing of the rated voltage applied to the electromagnet 21B by a driving circuit 25E 2
  • a waveform E 16 indicates a magnitude and application timing of the rated voltage applied to the electromagnet 21C by a driving circuit 25E 3
  • Energization/deenergization of the electromagnets 20A, 20B and 20C is performed in a relaying manner, so to say.
  • energization/deenergization of the electromagnets 21A, 21B and 21C is carried out in a relaying manner.
  • the energization/deenergization of the electromagnets 20A, 20B and 20C in a relaying manner makes it possible to change over the position of the movable feeding gripper 8A (or 8B) between the weft grip position and the weft release position in the course of moving of the feeding rapier head 1.
  • the energization and deenergization of the electromagnets 21A, 21B and 21C in the relaying fashion permits the positional change-over of the movable receiving gripper 12A (or 12B) between the weft grip position and the weft release position even when the receiving rapier head 2 is moving.
  • the voltage of minus polarity may be applied to the electromagnet in succession to a application of the voltage of plus polarity when the movable feeding gripper 8B and the movable receiving gripper 12B are employed, In that case, there can be obtained advantageous effects similar to those described previously in conjunction with the embodiment shown in Fig. 9.
  • the energization/deenergization of the electromagnets in the relaying fashion may be performed only for the operation of the feeding rapier head 1 or alternatively only for the operation of the receiving rapier head 2.
  • the feeding rapier head 1 is implemented by securing fixedly a base end portion of a flexible movable feeding gripper 8C to the stationary feeding gripper 7A.
  • a piezoelectric device 35 is interposed between the stationary feeding gripper 7A and the movable feeding gripper 8C.
  • the receiving rapier head 2 is implemented in such a structure in which a base end portion of a flexible movable feeding gripper 8C is secured to the stationary receiving gripper 11A.
  • a piezoelectric device 36 is interposed between the stationary receiving gripper 11A and the movable receiving gripper 12C. Electric wires connected to the piezoelectric devices 35 and 36 are laid down along the rapier bands 3 and 4, respectively.
  • the piezoelectric device 35 (or 36) is realized in such a structure in which piezoelectric elements 35a (or 36a) are stacked alternately with electric conductors 35b (or 36b) with the piezoelectric element 35a (or 36a) being sandwiched between the conductors 35b (or 36b).
  • One of the electric conductors 35b and 36b sandwiching the piezoelectric element 35a or 36a is connected to an electrode of plus polarity of a power source while the other is connected to the electrode of minus polarity.
  • the piezoelectric element 35a or 36a Upon application of a voltage to the piezoelectric device 35 or 36, the piezoelectric element 35a or 36a expands in the stacking direction, which results in that the piezoelectric device 35 or 36 as a whole expands.
  • the movable feeding gripper 8C of the feeding rapier head is disposed at the weft grip position upon voltage application to the piezoelectric device 35 and changed over to the weft release position in response to clearing of the applied voltage.
  • the movable receiving gripper 12C of the receiving rapier head is disposed at the weft grip position in response to the voltage application to the piezoelectric device 36 and shifted to the weft release position when the voltage applied to the piezoelectric device 36 is cleared.
  • the driving force for changing over the movable gripper 8C or 12C between the weft grip position and the weft release position originates in the expansion/contraction of the piezoelectric device 35 or 36.
  • the mechanism for changing over the movable gripper 8C or 12C between the weft grip position and the weft release position is positively prevented from interfering with the warp.
  • the warps can positively be protected against injury or damage due to the switching operations of the feeding rapier head 1 and the receiving rapier head 2.
  • the structure in which the movable gripper 8C or 12C is positively moved in response to the expansion/contraction of the piezoelectric device 35 or 36 facilitates setting of optimal timings for switching operations of the rapier heads 1 and 2, which in turn facilitates setting of the optimal timings for the gripping and releasing of the weft.
  • easiness in setting the optimal timings for gripping and releasing of the weft can assure positive pick-up of the weft Y by the feeding rapier head 1 as well as positive transfer of the weft Y from the feeding rapier head 1 to the receiving rapier head 2.
  • the spring member for gripping the weft is rendered unnecessary.
  • the driving mechanism for shifting the movable gripper 8C and 12C between the weft grip position and the weft release position can be realized only by a small size piezoelectric device, which contributes to further simplified and compact implementation of the driving mechanisms mentioned previously.
  • the electric wires connected to the piezoelectric device may be replaced by tapes or straps or tape-like material admixed with electrically conductive material.
  • the driving means may be implemented in the form of a wireless driving means.
  • permanent magnets can be used as the magnetic force exerting means.
  • a permanent magnet may be disposed in the vicinity of the retraction dead center position at the weft insertion starting side.
  • the weft insertion by the receiving rapier head is started.
  • the weft can positively be caught by the weft feeding rapier head when such arrangement is adapted that the magnetic action of the permanent magnet becomes rapidly lowered substantially at the time point when the weft is caught.
  • the permanent magnet may be disposed in the vicinity of the retraction dead center position at the weft insertion terminal side.
  • the movable gripper of the receiving rapier head is disposed at the weft release position under the action of the magnetic force generated by the permanent magnet, whereupon the weft as transported by the receiving rapier head is released therefrom.
  • the movable gripper is positionally changed over between the weft grip position and the weft release position by switching the magnetic force exerting means between the state in which the magnetic force thereof acts on the magnetic force responsive movable gripper and the state in which the magnetic force does not act on the movable gripper or alternatively by switching the piezoelectric stack means between the state in which a voltage is applied thereto and the state in which no voltage is applied, there is achieved the aimed advantageous effect that the weft insertion can be performed with high reliability while substantially avoiding injury or damage to the warps.
  • the present invention can be applied to a rapier loom in which each of the rapier heads is secured at a tip end of a rod which is adapted to be linearly and reciprocatively moved as well as a rapier loom in which the weft insertion is performed only by using a rapier head which is inserted into a shed defined by the warps from a weft insertion starting side.
  • the feeding and receiving rapier heads (1; 2) are each constituted by a combination of a stationary gripper member (7; 11) and a movable gripper member (8; 12) made of a magnetic material.
  • Electromagnets (18; 19) are disposed at both ends of a sley (17), respectively, while electromagnets (20; 21) are disposed at a mid portion of the sley.
  • the movable gripper member (8) of the feeding rapier head (1) positioned in opposition to the electromagnets (19; 21) is displaced from a weft grip position to a weft release position by controlling the magnetic action of the electromagnets (18; 20), while the movable gripper member (12) of the receiving rapier head (2) disposed oppositely to the electromagnets (19; 21) is displaced from the weft grip position to the weft release position by controlling the magnetic action of the electromagnets (19; 21).
  • the weft insertion can be carried out with high reliability while positively protecting the weft against injury.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP98105886A 1994-06-06 1995-05-29 Verfahren und Vorrichtung zum Schussfadeneintrag für Greiferwebmaschinen Withdrawn EP0864678A1 (de)

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JP123903/94 1994-06-06
JP6123903A JPH07331558A (ja) 1994-06-06 1994-06-06 レピア織機における緯入れ方法及び装置
EP95108182A EP0690160B1 (de) 1994-06-06 1995-05-29 Verfahren und Vorrichtung zum Schussfadeneintrag für Greiferwebmaschinen

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003025272A1 (en) * 2001-09-17 2003-03-27 Pbt (Ip) Limited High speed yarn transfer system incorporating reversing linkage and electro-optical synchronisation

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29808997U1 (de) * 1998-05-18 1998-07-30 Textilma Ag, Hergiswil Greifer und eine Schusseintragvorrichtung für eine Greiferwebmaschine
FR2783842A1 (fr) * 1998-09-30 2000-03-31 Icbt Diederichs Sa Dispositif pour l'insertion du fil de trame
DE19852794B4 (de) * 1998-11-16 2004-03-25 Lindauer Dornier Gmbh Steuerbare Schussfadenzubringer- und -klemmvorrichtung für Webmaschinen
DE10134504A1 (de) * 2001-07-05 2003-01-16 Picanol Nv Verfahren und Vorrichtung zum Öffnen einer Greiferklemme eines Greifers einer Webmaschine
JP2006503198A (ja) * 2002-10-10 2006-01-26 リンダウェル、ドルニエ、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング 織機の作業手段の部品の制御方法及び同方法の実施のための織機
WO2009026732A1 (de) * 2007-08-28 2009-03-05 Textilma Ag Greifer und schussfadeneintragvorrichtung für eine greiferwebmaschine
WO2008052369A1 (de) * 2006-10-30 2008-05-08 Textilma Ag Schussfadeneintragvorrichtung für eine greiferwebmaschine
EP1918437A1 (de) * 2006-11-02 2008-05-07 Sultex AG Verfahren und Vorrichtung zum Eintragen eines Schussfadens
EP2388361A1 (de) 2010-05-18 2011-11-23 Textilma AG Greifer und Schussfadeneintragvorrichtung für eine Greiferwebmaschine
MX336967B (es) * 2011-05-27 2016-02-08 Mitsubishi Rayon Co Telar y metodo de tejido usando dicho telar.
CN102251336B (zh) * 2011-07-21 2013-03-27 经纬纺织机械股份有限公司 电磁引纬载纬器、电磁引纬用剑杆及电磁引纬方法
CN103409890B (zh) * 2013-07-18 2014-11-05 江南大学 一种无弯曲织物织造的纬纱递进装置
CN104642573A (zh) * 2015-02-26 2015-05-27 潜山县妙山茶业有限公司 一种桑茶茶叶的制作工艺
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CN106544777B (zh) * 2016-11-08 2017-11-17 武汉纺织大学 一种电磁驱动的悬浮式片梭引纬方法及装置
CN106381601B (zh) * 2016-12-02 2018-03-09 佛山慈慧通达科技有限公司 一种新型三维织物织机多剑杆引纬设备及其织造方法
CN106592067A (zh) * 2016-12-30 2017-04-26 武汉纺织大学 一种用于超宽门幅织机引纬的电磁发射装置及方法
CN108660589A (zh) * 2018-04-16 2018-10-16 吴江市鼎盛丝绸有限公司 一种剑杆织机及其引纬方法
CN110670208B (zh) * 2019-09-04 2022-03-25 西安工程大学 一种电磁引纬夹纬器、打开器及其夹纬方法
CN110629366B (zh) * 2019-10-10 2020-12-22 海宁市经之纬家纺织造有限公司 双线式纺织纬线织布装置
CN111705396B (zh) * 2020-05-29 2022-06-03 江苏万邦特种纺织发展有限公司 一种皮划艇防水布用剑杆织机引纬装置及其加工工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963229A (en) * 1972-12-22 1976-06-15 Ruti-Te Strake B.V. Device for manipulating yarns
FR2372256A1 (fr) * 1976-06-04 1978-06-23 Piquemal Jean Mouvement de battant avec rotation pour tissage a gabarit electronique
GB2059455A (en) * 1979-09-29 1981-04-23 Northrop Weaving Machinery Ltd Improvements in or relating to looms with stationary weft supply
EP0299553A1 (de) * 1987-06-29 1989-01-18 Picanol N.V. Fadenklappe
EP0526390A1 (de) * 1991-07-24 1993-02-03 Sulzer RàœTi Ag Greiferwebmaschine mit auf Fadeneigenschaften einstellbarer Schusseintragsvorrichtung
EP0624671A1 (de) * 1993-05-12 1994-11-17 Sulzer RàœTi Ag Fadenhalter für einen Bringergreifer und Greiferwebmaschine mit Fadenhalter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963229A (en) * 1972-12-22 1976-06-15 Ruti-Te Strake B.V. Device for manipulating yarns
FR2372256A1 (fr) * 1976-06-04 1978-06-23 Piquemal Jean Mouvement de battant avec rotation pour tissage a gabarit electronique
GB2059455A (en) * 1979-09-29 1981-04-23 Northrop Weaving Machinery Ltd Improvements in or relating to looms with stationary weft supply
EP0299553A1 (de) * 1987-06-29 1989-01-18 Picanol N.V. Fadenklappe
EP0526390A1 (de) * 1991-07-24 1993-02-03 Sulzer RàœTi Ag Greiferwebmaschine mit auf Fadeneigenschaften einstellbarer Schusseintragsvorrichtung
JPH05195373A (ja) * 1991-07-24 1993-08-03 Gebr Sulzer Ag 糸の特性に合わせて調整することのできる横糸ピック機構を有するレピア織機
EP0624671A1 (de) * 1993-05-12 1994-11-17 Sulzer RàœTi Ag Fadenhalter für einen Bringergreifer und Greiferwebmaschine mit Fadenhalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003025272A1 (en) * 2001-09-17 2003-03-27 Pbt (Ip) Limited High speed yarn transfer system incorporating reversing linkage and electro-optical synchronisation
US7124783B2 (en) 2001-09-17 2006-10-24 Pbt (Ip) Limited High speed yarn transfer system incorporating reversing linkage and electro-optical synchronization

Also Published As

Publication number Publication date
KR960013897B1 (ko) 1996-10-10
TW297841B (de) 1997-02-11
DE69518367T2 (de) 2001-02-22
CN1119681A (zh) 1996-04-03
CN1077617C (zh) 2002-01-09
JPH07331558A (ja) 1995-12-19
DE69518367D1 (de) 2000-09-21
CN1203289A (zh) 1998-12-30
EP0690160B1 (de) 2000-08-16
EP0690160A1 (de) 1996-01-03
CN1040675C (zh) 1998-11-11
KR960001246A (ko) 1996-01-25

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