EP3478882B1 - Vorrichtung zum festklemmen von schussfäden - Google Patents

Vorrichtung zum festklemmen von schussfäden Download PDF

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Publication number
EP3478882B1
EP3478882B1 EP17728879.2A EP17728879A EP3478882B1 EP 3478882 B1 EP3478882 B1 EP 3478882B1 EP 17728879 A EP17728879 A EP 17728879A EP 3478882 B1 EP3478882 B1 EP 3478882B1
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EP
European Patent Office
Prior art keywords
clamping
opener
finger
support element
eccentric
Prior art date
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Active
Application number
EP17728879.2A
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English (en)
French (fr)
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EP3478882A1 (de
Inventor
Eddy Verclyte
Wim Hoorelbeke
Ronny COULEMBIER
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.)
Picanol NV
Original Assignee
Picanol NV
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Publication date
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP3478882A1 publication Critical patent/EP3478882A1/de
Application granted granted Critical
Publication of EP3478882B1 publication Critical patent/EP3478882B1/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—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
    • D03D47/125—Weft holding devices
    • 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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the invention relates to a device and a method for clamping weft threads in a weaving machine, more particularly in a rapier weaving machine.
  • rapier weaving machines also named gripper weaving machines
  • a weft thread positioned in the path of a gripper is gripped by the gripper and inserted into a shed.
  • the inserted weft thread is cut off on the insertion side in order to allow a subsequent weft thread to be inserted.
  • a device comprising a plurality of clamping elements, wherein two adjacent clamping elements define a clamp.
  • the central clamping element is fixedly mounted to a rod and moveable by means of the rod in the clamping direction.
  • the other clamping elements are forced by springs towards the central clamping element.
  • the device further comprises an opener element in order to move two adjacent clamping elements apart in order to allow a weft thread to enter between these two adjacent clamping elements. By means of the rod, two selected clamping elements can be moved in front of the opener element.
  • the device for clamping a weft thread according to WO 2013007551 A2 is adapted to co-operate with two weft threads.
  • Several such devices for clamping a weft thread can be provided which allows weaving with more than two weft threads.
  • two such devices can be used which are arranged mirror symmetrical to each other. Nevertheless using a number of such devices does not result in a compact structure to be arranged on a weaving machine.
  • a device for clamping a plurality of weft threads comprising at least one clamping unit, a support element, and an opener element with at least one finger
  • the at least one clamping unit comprises an abutment element fixedly attached to the support element, at least one clamping element moveably mounted to the support element and arranged at a side of the abutment element, in particular two clamping elements moveably mounted to the support element at either side of the abutment element, and at least one force element, wherein each clamping element together with the abutment element defines a clamp, wherein the at least one force element forces each clamping element towards the abutment element, wherein the support element and the opener element are mounted displaceable relative to each other in a clamping direction, wherein each clamping element is pivotally mounted to the support element about a pivot axis perpendicular to the clamping direction, and wherein the opener element is adapted to be arranged in an operating position, wherein when the opener element is
  • the device comprises at least two clamping elements associated to one clamping unit or to different clamping units.
  • only one clamping unit is provided, wherein the one clamping unit comprises two clamping elements moveably mounted to the support element at either side of the abutment element.
  • two or more clamping units are provided, wherein each clamping unit comprises only one clamping element or two clamping elements moveably mounted to the support element at either side of the abutment element.
  • the abutment element is fixedly arranged at the support element.
  • the abutment element is manufactured integrally with the support element.
  • the abutment element is manufactured separately and attached fixed in position to the support element.
  • the clamping elements are pivotally mounted to the support element and a clamp is opened by pivoting the associated clamping element against the force of the at least one associated force element away from the abutment element.
  • the clamping element in preferred embodiments is a two-sided lever, wherein a front end contacts the abutment element for forming a clamp and wherein the rear end is forced by means of the force element for forcing the front end towards the abutment element.
  • the force element is for example a spring mounted between the abutment element and the clamping element or mounted between the two clamping elements of one clamping unit.
  • a pivot movement of one clamping element for opening the respective clamp is caused by an interaction between the opener element, more particular a finger of the opener element, and said clamping element upon the relative movement of the opener element and the support element in the clamping direction.
  • the opener element is mounted moveable in the clamping direction for causing a pivot movement of the clamping element.
  • the opener element is held fixed in position in the clamping direction for allowing moving the clamping element away from the abutment element by a movement of the support element.
  • the finger is fork-shaped having two teeth, wherein each tooth can interact with one clamping element of a clamping unit.
  • a bar-shaped or spear-shaped finger is provided which is arranged to interact with the clamping elements.
  • each clamping element is provided with an operating structure displaced from the pivot axis for interacting with the at least one finger of the opener element upon a relative displacement between the support element and the opener element.
  • the operating structure is provided on a surface of the respective clamping element perpendicular to the clamping direction.
  • the operating structure is an operating pin protruding from a side surface of the respective clamping element, wherein in particular the operating pin is arranged between the pivot axis of the clamping element and a clamping position for a weft thread.
  • the operating pin When providing an operating pin between the clamping position and the pivot axis in a direction perpendicular to the clamping direction, one finger, which is inserted between the two operating pins of one clamping unit is sufficient for a selective operation of both clamps associated with an abutment element, wherein one of the two clamping elements is forced to pivot about its pivot axis depending on the movement direction of the operating structure relative to the opener element in the clamping direction.
  • opener element a single bar-shaped finger is provided that is arranged fixed in position in the clamping direction.
  • an opener element with fork-shaped fingers is provided, wherein each finger can be assigned to at least one clamping element of a clamping unit.
  • the opener element when providing only one clamping unit the opener element can be mounted fixed in position, wherein the clamping unit is moved to-and-fro in the clamping direction for opening one of the two associated clamps.
  • two or more clamping units are provided, wherein the opener element is mounted displaceable between the operating position and a rest position in a feed direction perpendicular to the clamping direction at a fixed height in the clamping direction, and wherein the support element is mounted displaceable in the clamping direction, so that when the opener element is in the rest position by displacing the support element in the clamping direction a selected clamping unit can be placed in front of the central finger of the opener element.
  • the opener element is moveable into the rest position for displacing the support element together with the clamping elements, wherein all clamps remain closed.
  • the finger is moved into the operating position and a displacement of the support element causes a pivot movement of one of the clamping elements as described above.
  • exactly two clamping units are provided, wherein the opener element comprises one central finger and two outer fingers, wherein the two outer fingers are displaced from the central finger in the feed direction, wherein the opener element is moveable in the feed direction between a rest position, a first operating position and a second operating position, wherein the opener element when arranged in the first operating position or in the second operating position interacts with the clamping elements upon a relative displacement between the support element and the opener element in the clamping direction, so that one of the central finger and the two outer fingers interacts with one of the clamping elements for causing said clamping element to pivot about the pivot axis against the force of the at least one force element for opening the associated clamp or for reducing a clamping force at the associated clamp.
  • a first clamp provided at a first clamping unit in front of the central finger for receiving an inserted weft thread
  • the opener element can be moved into the second operating position and by displacing the support element relative to the opener element in the clamping direction a second clamp provided at a second clamping unit, which is not arranged in front of the central finger, can be opened, or a clamping force at this clamp can be reduced, by means of one of the outer fingers.
  • the two outer fingers are provided at either side of the central finger in the clamping direction and displaced from the central finger in the clamping direction, wherein a distance between the central finger and each outer finger at least essentially equals to a distance between the abutment elements of the two clamping units.
  • a distance between the central finger and each outer finger at least essentially equals to a distance between the abutment elements of the two clamping units.
  • the opener element in preferred embodiments is formed such that the central finger does not interfere with clamping elements upon a relative displacement between the support element and the opener element in the clamping direction, when the opener element is in the second operating position.
  • a first driving device comprising a first motor is provided for a displacement of the support element in the clamping direction, wherein in particular the first driving device comprises a first eccentric driven to pivot about a first drive axis perpendicular to the clamping direction.
  • the eccentric allows positioning the support element together with the clamping units very accurately.
  • the eccentric is in contact with the support element and directly drives the support element.
  • the first driving device further comprises a first transfer element mounted slidably, wherein the first eccentric drives the first transfer element to move the first transfer element to-and-fro in the clamping direction upon rotation of the first eccentric.
  • the design of the transfer element is chosen suitably by the person skilled in the art.
  • the first transfer element is a first frame, wherein the first eccentric is arranged inside the first frame.
  • the stroke of the transfer element depends among others on dimensions of the frame, a size of the eccentric, a relative position of the drive axis of the eccentric with respect to the center of the frame and/or a relative angular rotation of the drive axis.
  • the opposing surfaces of the eccentric and the frame in one embodiment are made of or coated with a wear-resistant material.
  • a wear protection ring is provided between the first eccentric and the first frame to limit the wear.
  • a second driving device comprising a second motor is provided for a displacement of the opener element in the feed direction.
  • the second driving device in preferred embodiments has at least essentially a similar design as the first driving device to decrease the manufacturing costs.
  • the second driving device comprises a second eccentric driven to pivot about a second drive axis perpendicular to the feed direction.
  • the second driving device further in preferred embodiments comprises a second transfer element mounted slidably, wherein the second eccentric drives the second transfer element to move the second transfer element to-and-fro in the feed direction upon rotation of the second eccentric.
  • the second transfer element in particular can be a second frame, wherein the second eccentric is arranged inside the second frame, and wherein in particular a wear protection ring can be provided between the second eccentric and the second frame.
  • a weaving machine with a device for clamping weft threads is provided.
  • the device is arranged at an angle with respect to an insertion direction of the weaving machine, so that a weft thread entering into the device extends at least essentially perpendicular to the direction in which the weft thread enters into the device.
  • a method for clamping weft threads with a device comprising at least one clamping unit, a support element, and an opener element with at least one finger
  • the clamping unit comprises an abutment element fixedly mounted to the support element, at least one clamping element moveably mounted to the support element and arranged at a side of the abutment element, in particular two clamping elements moveably mounted to the support element at either side of the abutment element, and at least one force element, wherein each clamping element together with the abutment element defines a clamp, wherein the at least one force element forces the clamping elements towards the abutment element, and wherein each clamping element is pivotally mounted to the support element about a pivot axis perpendicular to a clamping direction
  • the method comprises displacing the support element relative to the opener element in a clamping direction while the opener element is arranged in an operating position, wherein the at least one finger interacts with one of the clamping elements for causing said clamp
  • Fig. 1 shows a top view of a device 1 for clamping weft threads, arranged on a rapier weaving machine.
  • the rapier weaving machine is only partly shown.
  • the rapier weaving machine comprises presenting devices 2 for presenting weft threads 7, 8, 9, 10, and a gripper 3 for gripping one or more weft threads 7, 8, 9, 10 presented by presenting devices 2 and for inserting presented weft threads into a shed.
  • the rapier weaving machine further comprises a thread guiding device 4 and a cutting apparatus 5.
  • the device 1 for clamping weft threads is arranged between the cutting apparatus 5 and the thread guiding device 4.
  • the cutting apparatus 5 is attached to a support 6 that supports the device 1 for clamping weft threads.
  • Fig. 1 four weft threads 7, 8, 9, 10 are schematically shown.
  • the device 1 is arranged for receiving a weft thread 7, 8, 9, 10 upon beat up and to retain a plurality of weft threads 7, 8, 9, 10 after the weft threads are cut by means of the cutting apparatus 5.
  • the second weft thread 8 guided past the thread guiding device 4 runs from the presenting device 2, via the device 1 for clamping weft threads and the cutting apparatus 5 to the cloth edge 11 and the woven cloth 12 with the cloth line 13.
  • Fig. 1 four weft threads 7, 8, 9, 10 are schematically shown.
  • the device 1 is arranged for receiving a weft thread 7, 8, 9, 10 upon beat up and to retain a plurality of weft threads 7, 8, 9, 10 after the weft threads are cut by means of the cutting apparatus 5.
  • the second weft thread 8 guided past the thread guiding device 4 runs from the presenting device 2, via the device 1 for clamping weft threads and the cutting apparatus 5 to the cloth edge
  • the cloth edge 11 is a side edge of the cloth 12 that extends in warp direction, while the cloth line 13 is the beat up edge of the cloth 12 that extends in weft direction.
  • the clamped weft thread 8 is cut off by the cutting apparatus 5 between the device 1 and the cloth edge 11.
  • one of the weft threads 7, 8, 9, 10 presented by one of the presenting devices 2 is taken up by the gripper 3, the leading end of the weft thread is pulled out of the device 1 and the weft thread is inserted in the shed. After the insertion, the inserted weft thread is moved upon beat-up to enter an associated clamp of the device 1.
  • the cutting apparatus 5 forms a functional unit or module with the device 1 for clamping weft threads.
  • This module can be positioned with respect to a frame of the weaving machine, in particular in an adjustable position with respect to a gripper path, a cloth line and a cloth edge, and fixedly mounted to the frame of the weaving machine in a suitable position.
  • the device 1 is arranged at an angle with respect to the insertion direction N, wherein the angle is adapted to the line of a weft thread 8 running from the presenting device 2 to the cloth edge 11, so that clamping elements of the device 1 (not shown in detail in Fig. 1 ) extend in a direction at least essentially perpendicular to the direction in which weft threads enter the device 1.
  • Such an arrangement is advantageous for catching the weft thread.
  • Fig. 2 shows a perspective view of an embodiment of the device 1 according to the invention and the arrangement of this device 1 with respect to a cutting apparatus 5 and a thread guiding device 4.
  • Figs. 3 to 7 show side views of the device 1 of Fig. 2 seen in the direction of arrow S in Fig. 1 in five different states of use.
  • Fig. 8 is an exploded view of the device 1 of Fig. 2 .
  • Fig. 9 is a dismantled view of a support element 16 and two clamping units 20, 21 of the device 1 of Fig. 2 .
  • Fig. 10 shows another perspective view of an embodiment of the device 1 according to the invention.
  • the device 1 for clamping weft threads comprises a support element 16 and two clamping units 20, 21, which are arranged at the support element 16 one above the other in a clamping direction 14.
  • each clamping unit 20, 21 comprises two clamping elements 22, 23, 24, 25, an abutment element 26, 27 arranged between the two clamping elements 22, 23, 24, 25 and a force element 28, 29.
  • the force element 28, 29 is a spring in the embodiment shown.
  • the abutment elements 26, 27 are arranged fixedly in position at the support element 16. In the embodiment shown, the abutment elements 26, 27 are manufactured integrally with the support element 16.
  • Each clamping element 22, 23, 24, 25 together with the associated abutment element 26, 27 defines a clamp 60, 61, 62, 63 that can clamp a weft thread in a clamping position between a clamping element 22, 23, 24, 25 and an associated abutment element 26, 27.
  • the clamping device 1 has four clamps 60, 61, 62, 63, each for clamping one of the four weft threads 7, 8, 9, 10 (see Fig. 1 ).
  • each clamping element 22, 23, 24, 25 is pivotally mounted to the support element 16 about a pivot axis 17, 18 perpendicular to the clamping direction 14, which pivot axis 17, 18 is mounted to the support element 16.
  • the clamping elements 22, 23, 24, 25 each take the form of a two-sided lever, wherein at each clamping unit 20, 21 the force element 28, 29 is arranged between the rear ends of the two clamping elements 22, 23, 24, 25, and wherein the force element 28, 29 forces the respective front ends of the two clamping elements 22, 23, 24, 25 against the abutment elements 26, 27.
  • the clamping elements 22, 23, 24, 25 are suitably formed for ensuring a good clamping in a particular zone of the clamping elements 22, 23, 24, 25.
  • the abutment elements 26, 27 are provided with clamping surfaces having a T-shaped cross-section facing the clamping elements 22, 23, 24, 25 having clamping surfaces with a corresponding U-shaped cross-section.
  • each operating pin 44, 45, 46, 47 is arranged in the feed direction 15 between the pivot axis 17, 18 and the clamping position of the associated clamping element 22, 23, 24, 25.
  • the device 1 comprises an opener element 40.
  • the support element 16 together with the clamping units 20, 21 is displaceable relative to the opener element 40 in the clamping direction 14 by means of a first driving device 30.
  • the clamping direction 14 is oriented essentially vertical. However, this orientation is not necessary for the functioning of the device and other orientations are conceivable.
  • the opener element 40 is arranged displaceable in a feed direction 15 perpendicular to the clamping direction 14 at a fixed height in the clamping direction 14 between a rest position, a first operating position and a second operating position. A movement of the opener element 40 is effected by means of a second driving device 50.
  • a pivot movement of the clamping elements 22, 23, 24, 25 for opening a clamp 60, 61, 62, 63 is effected by means of the opener element 40.
  • the opener element 40 has a central finger 41 protruding in the feed direction 15, that in a first operating position can interact with operating pins 44, 45, 46, 47 protruding from side surfaces of the clamping elements 22, 23, 24, 25.
  • the opener element 40 is moved to the rest position away from the support element 16.
  • the support element 16 can be moved to-and-fro in the clamping direction 14 by means of the first driving device 30, wherein all clamping positions remain securely closed due to the forces applied by the force elements 28, 29 .
  • the support element 16 is moved such that the associated clamping unit 20 is placed in front of the central finger 41 of the opener element 40.
  • the opener element 40 is driven to move in the feed direction 15 into a first operating position.
  • the opener element 40 in the first operating position the opener element 40 is moved towards the clamping unit 20 so that the central finger 41 enters between the two operating pins 44, 45 of the two clamping elements 22, 23 of the clamping unit 20 placed in front of the central finger 41 as shown in Fig. 4 .
  • the support element 16 is then driven to move upwards or downwards in the clamping direction 14.
  • the central finger 41 When moving the support element 16 upwards as shown in Fig. 5 , the central finger 41 interacts with the operating pin 45 of the lower clamping element 23 of the two clamping elements 22, 23. Hence, a conjoint movement of the operating pin 45 together with the support element 16 in the clamping direction 14 is hindered by the central finger 41.
  • the clamping element 23 is mounted to the support element 16 pivotally about the pivot axis 18, which pivot axis 18 is arranged at and moved with the support element 16. By a movement of the support element 16 with respect to the central finger 41, a pivot movement of this clamping element 23 about the pivot axis 18 is caused. Similar, when moving the support element 16 downwards from the state as shown in Fig.
  • the central finger 41 interacts with the operating pin 44 of the upper clamping element 22 of the two clamping elements 22, 23 causing a pivot movement of this clamping element 22 about the pivot axis 17, which pivot axis 17 is arranged at the support element 16 and moved with the support element 16.
  • the central finger 41 is arranged fixed in position in the clamping direction 14, wherein the position of the central finger 41 is adapted to the position and the design of the thread guiding device 4 allowing a good guidance of an inserted weft thread into the clamp 60, 61, 62, 63 towards the clamping position.
  • the support element 16 is moved for opening a clamp 61 such that the abutment element 26 and the clamping element 23 are at least essentially aligned with a guiding element 64, 65, 66 of the thread guiding device 4.
  • the inserted weft thread is guided by guiding elements 64, 65, 66 of the thread guiding device 4 to the associated clamp 61 that is arranged almost aligned with the guiding elements 64, 65, 66.
  • the guiding element 66 is arranged in a settable angular position to the thread guiding device 4 in order to set the split between the guide elements 65 and 66 near the clamps.
  • the respective clamp can be opened by means of the central finger 41 as described above.
  • the opener element 40 is provided with two additional outer fingers 42, 43 at either side of the central finger 41.
  • the outer fingers 42, 43 are displaced from the central finger 41 in the clamping direction 14, wherein the distance between the outer fingers 42, 43 and the central finger 41 is chosen so that when one clamping unit 20, 21 is arranged in front of the central finger 41, one of the outer fingers 42, 43 can enter between the operating pins 44, 45, 46, 47 of the other clamping unit 20, 21, this means the outer finger 42 is intended to interact with the operating pin 44 or 45, the outer finger 43 is intended to interact with the operating pin 46 or 47 and the central finger 41 is intended to interact with the operating pin 44, 45, 46 or 47.
  • the upper clamping unit 20 is positioned in front of the central finger 41 for receiving a weft thread in one of its clamps.
  • the opener element 40 can move beyond the first operating position shown in Figs. 4 and 5 towards a second operating position shown in Fig. 6 .
  • the opener element 40 is moved beyond the first operating position towards the second operating position such that a distal end of the central finger 41 is moved beyond the operating pins 44, 45 of the upper clamping unit 20, and the lower outer finger 43 is moved between the operating pins 46, 47 of the lower clamping unit 21.
  • the outer fingers 42, 43 are displaced from the central finger 41 in the feed direction 15 such that the outer fingers 42, 43 are not in the movement path of the operating pins 44, 45, 46, 47 when the opener element 40 is in the first operating position (see Figs. 4 , 5 ) and the central finger 41 is positioned between the operating pins 44, 45, 46, 47.
  • the central finger 41 is formed such that an interference or collision of the central finger 41 and the operating pins 44, 45, 46, 47 is avoided when the opener element 40 is in the second operating position (see Fig. 6 ) and one of the outer fingers 42, 43 is positioned between the operating pins 44, 45, 46, 47.
  • the central finger 41 is provided with a protrusion 49 (see Fig. 7 ) at its distal end that only in the first operating position can interact with the operating pins 44, 45, 46, 47.
  • the support element 16 is displaced only over a small distance.
  • the opener element 40 is moved back into the rest position (see Fig. 3 ) and the support element 16 is moved together with the clamping units 20, 21 in the clamping direction 14 for bringing the second clamping unit 21 in front of the central finger 41, so that upon moving the opener element 40 into the first operating position the protrusion 49 of the central finger 41 enters between the operating pins 46, 47 of the lower clamping unit 21 as shown in Fig. 7 .
  • a first driving device 30 comprising a first eccentric 31 driven to pivot about a first drive axis 32, which first drive axis 32 is perpendicular to the clamping direction 14, for displacing the support element 16 in the clamping direction.
  • the first driving device 30 further comprises a first transfer element 33 in the form of a first frame, wherein the support element 16 is fixedly mounted to the first frame. In the embodiment shown, the support element 16 is fixedly mounted to the first frame by screws 19.
  • pins 67 are provided for positioning the support element 16.
  • the first eccentric 31 is arranged inside the first frame. The first frame drives the first eccentric 31 to move in the clamping direction 14 upon rotation of the eccentric 31.
  • a wear protection ring 34 is provided at the periphery of the eccentric 31 between the eccentric 31 and the first frame.
  • the first driving device 30 further comprises a first motor 35 having a motor axis 36.
  • the eccentric 31 is mounted to the motor axis 36 by means of a mounting element 37 formed integrally with the eccentric 31 and a fixation element 38 screwed to the mounting element 37 using screws 39.
  • the movement of the support element 16 is transferred to the clamping elements 22, 23, 24, 25 and all clamping elements 22, 23, 24, 25 are displaced together with the support element 16.
  • the clamping elements 22, 23, 24, 25 maintain their relative position with respect to the abutment elements 26, 27 due to the force of the force elements 28, 29 acting on the clamping elements 22, 23, 24, 25.
  • the movement of the support element 16 does not cause a compression or deformation of the force elements 28, 29.
  • the clamping force remains at least essentially constant independent of the position of the support element 16 in the clamping direction 14.
  • the opener element 40 can be driven by means of a second driving device 50 to move in the feed direction 15 and to enter between the operating pins 44, 45, 46, 47 of two clamping elements 22, 23, 24, 25.
  • the second driving device 50 adapted for displacing the opener element 40 is similar in construction to the first driving device 30.
  • the second driving device 50 comprises a second eccentric 51 driven to pivot about a second drive axis 52, which second drive axis 52 is perpendicular to the feed direction 15.
  • the second driving device 50 further comprises a second transfer element 53 in the form of a second frame, wherein the opener element 40 is mounted fixedly to the second frame using screws 48 and pins 68.
  • the second eccentric 51 is arranged inside the second frame, wherein in the embodiment shown a wear protection ring 54 is provided at the periphery of the second eccentric 51 between the second eccentric 51 and the second frame.
  • the second eccentric 51 acts on the second frame to move the second frame in the feed direction 15 upon rotation of the second eccentric 51.
  • the second driving device 50 further comprises a second motor 55 having a second motor axis 56.
  • the second eccentric 51 is mounted to the second motor axis 56 by means of a mounting element 57 formed integrally with the second eccentric 51 and a fixation element 58 screwed to the mounting element 57 using screws 59.
  • the first transfer element 33 is guided by a guide 70 provided in the main frame 69 of the device 1, and the second transfer element 53 is guided by a guide 71 provided in the main frame 69 of the device 1.
  • the opener element 40 near the protrusion 49 comprises a cavity 72 that allows that the operating pins 44, 45, 46, 47 can pass through the cavity 72, in particular when the opener element 40 is in the second operating position.
  • the thread guiding device 4 is arranged fixed in position and with screws 73 to the main frame 69.
  • the guiding element 66 is part of a plate 78 that is fixed with screws 74 and 75 to the guiding element 64 of the thread guiding device 4. In order to set the angle between the guiding element 66 and the guiding element 64, the screw 75 can be moved along at least one opening 76, 77 in the plate 78.
  • the device 1 comprises only one clamping unit 20, 21, a displacement of the opener element 40 in the feed direction is not necessary and the opener element 40 can be arranged fixed in position in the operating position as shown in Fig. 4 .
  • the feed direction does not necessarily need to be linear and perpendicular to the clamping direction, but according to an alternative, for example, can run along a circular arc that extends essentially perpendicular to the clamping direction.
  • the device and the method for clamping a weft thread according to the invention are not limited to the embodiments shown and described by way of example, but can also comprise variants and combinations of these embodiments that fall under the claims.

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  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (15)

  1. Vorrichtung zum Klemmen mehrerer Schussfäden (7, 8, 9, 10), umfassend mindestens eine Klemmeinheit (20, 21), ein Stützelement (16), und ein Öffnerelement (40) mit mindestens einem Finger (41, 42, 43), wobei die mindestens eine Klemmeinheit (20, 21) ein Anschlagelement (26, 27), das fest an dem Stützelement (16) befestigt ist, mindestens ein Klemmelement (22, 23, 24, 25), das beweglich an dem Stützelement (16) montiert ist und an einer Seite des Anschlagelements (26, 27) angeordnet ist, und mindestens ein Kraftelement (28, 29) umfasst, wobei das mindestens eine Klemmelement (22, 23, 24, 25) zusammen mit dem Anschlagelement (26, 27) eine Klemme (60, 61, 62, 63) definiert, wobei das mindestens eine Kraftelement (28, 29) das mindestens eine Klemmelement (22, 23, 24, 25) zum Anschlagelement (26, 27) hin zwingt, und wobei das Stützelement (16) und das Öffnerelement (40) relativ zueinander in einer Klemmrichtung (14) verschiebbar montiert sind, dadurch gekennzeichnet, dass die Vorrichtung mindestens zwei Klemmelemente (22, 23, 24, 25), die einer Klemmeinheit (20, 21) oder verschiedenen Klemmeinheiten (20, 21) zugeordnet sind, umfasst, wobei jedes Klemmelement (22, 23, 24, 25) an dem Stützelement (16) um eine Schwenkachse (17, 18) senkrecht zur Klemmrichtung (14) schwenkbar montiert ist, und dass das Öffnerelement (40) dazu ausgebildet ist, um in einer Betriebsposition angeordnet zu werden, wobei, wenn das Öffnerelement (40) in der Betriebsposition angeordnet ist, bei einer relativen Verschiebung zwischen dem Stützelement (16) und dem Öffnerelement (40) der mindestens eine Finger (41, 42, 43) mit einem der Klemmelemente (22, 23, 24, 25) interagiert, um zu bewirken, dass das genannte Klemmelement (22, 23, 24, 25) gegen die Kraft des mindestens einen Kraftelements (28, 29) um die Schwenkachse (17, 18) schwenkt, zum Öffnen der zugehörigen Klemme (60, 61, 62, 63).
  2. Die Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jedes Klemmelement (22, 23, 24, 25) mit einer Betriebsstruktur (44, 45, 46, 47) versehen ist, die von der Schwenkachse (17, 18) verschoben ist, um mit dem mindestens einen Finger (41, 42, 43) des Öffnerelements (40) bei einer relativen Verschiebung zwischen dem Stützelement (16) und dem Öffnerelement (40) zu interagieren.
  3. Die Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Betriebsstruktur (44, 45, 46, 47) ein Betätigungsstift ist, der aus einer Seitenfläche des jeweiligen Klemmelements (22, 23, 24, 25) herausragt, wobei insbesondere der Betätigungsstift zwischen der Schwenkachse (17, 18) des jeweiligen Klemmelements (22, 23, 24, 25) und einer Klemmposition für einen Schussfaden (7, 8, 9, 10) angeordnet ist.
  4. Die Vorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass zwei oder mehr Klemmeinheiten (20, 21) vorgesehen sind, wobei das Öffnerelement (40) verschiebbar zwischen der Betriebsposition und einer Ruheposition in einer Lieferrichtung (15) im Wesentlichen senkrecht zur Klemmrichtung (14) in einer festen Höhe in der Klemmrichtung (14) montiert ist, und wobei das Stützelement (16) verschiebbar in der Klemmrichtung (14) montiert ist, so dass, wenn das Öffnerelement sich in der Ruheposition befindet, durch Verschieben des Stützelements (16) in der Klemmrichtung (14), eine ausgewählte Klemmeinheit (20, 21) vor dem mindestens einen Finger (41, 41, 42) des Öffnerelements (40) angeordnet werden kann.
  5. Die Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zwei Klemmeinheiten (20, 21) vorgesehen sind, wobei das Öffnerelement (40) einen Zentralfinger (41) und zwei äussere Finger (42, 43) umfasst, die vom Zentralfinger (41) in der Lieferrichtung (15) verschoben sind, wobei das Öffnerelement (40) in der Lieferrichtung (15) zwischen einer Ruheposition, einer ersten Betriebsposition und einer zweiten Betriebsposition beweglich ist, wobei das Öffnerelement (40), wenn es in der ersten Betriebsposition oder in der zweiten Betriebsposition angeordnet ist, mit einem der Klemmelemente (22, 23, 24, 25) bei einer relativen Verschiebung zwischen dem Stützelement (16) und dem Öffnerelement (40) in der Klemmrichtung (14) interagiert, so dass einer vom Zentralfinger (41) oder den zwei äusseren Fingern (42, 43) mit einem der Klemmelemente (22, 23, 24, 25) interagiert, um zu bewirken, dass das genannte Klemmelement (22, 23, 24, 25) gegen die Kraft des mindestens einen Kraftelements (28, 29) um die Schwenkachse (17, 18)schwenkt, zum Öffnen der zugehörigen Klemme (60, 61, 62, 63) oder zum Reduzieren einer Klemmkraft an der zugehörigen Klemme (60, 61, 62, 63).
  6. Die Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die äusseren Finger (42, 43) an beiden Seiten des Zentralfingers (41) in der Klemmrichtung (14) vorgesehen sind und vom Zentralfinger (41) in der Klemmrichtung (14) verschoben sind, wobei ein Abstand zwischen dem Zentralfinger (41) und jedem äusseren Finger (42, 43) mindestens im Wesentlichen einem Abstand zwischen den Anschlagelementen (26, 27) der beiden Klemmeinheiten (20, 21) entspricht.
  7. Die Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Zentralfinger (41) so ausgebildet ist, dass der Zentralfinger (41) nicht mit den Klemmelementen (22, 23, 24, 25) interferiert bei einer relativen Verschiebung zwischen dem Stützelement (16) und dem Öffnerelement (40) in der Klemmrichtung (14), wenn das Öffnerelement (40) sich in der zweiten Betriebsposition befindet.
  8. Die Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass eine erste Antriebsvorrichtung (30) umfassend einen ersten Motor (35) vorgesehen ist für eine Verschiebung des Stützelements (16) in der Klemmrichtung (14), wobei insbesondere die erste Antriebsvorrichtung (30) einen ersten Exzenter (31) umfasst, der angetrieben wird, zum Schwenken um eine erste Antriebsachse (32) senkrecht zur Klemmrichtung (14).
  9. Die Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die erste Antriebsvorrichtung (30) weiter ein gleitverschiebbar montiertes erstes Übertragungselement (33) umfasst, wobei der erste Exzenter (31) das erste Übertragungselement (33) antreibt, um bei Drehung des ersten Exzenters (31) das erste Übertragungselement (33) in der Klemmrichtung (14) hin und her zu bewegen.
  10. Die Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das erste Übertragungselement (33) ein erster Rahmen ist, wobei der erste Exzenter (31) innerhalb des ersten Rahmens angeordnet ist, und wobei insbesondere ein Verschleissschutzring (34) zwischen dem ersten Exzenter (31) und dem ersten Rahmen vorgesehen ist.
  11. Die Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass eine zweite Antriebsvorrichtung (50) umfassend einen zweiten Motor (55) vorgesehen ist für eine Verschiebung des Öffnerelements (40) in der Lieferrichtung (15), wobei insbesondere die zweite Antriebsvorrichtung (50) einen zweiten Exzenter (51) umfasst, der angetrieben wird, zum Schwenken um eine zweite Antriebsachse (52) im Wesentlichen senkrecht zur Lieferrichtung (15).
  12. Die Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass die zweite Antriebsvorrichtung (50) weiter ein gleitverschiebbar montiertes zweites Übertragungselement (53) umfasst, wobei der zweite Exzenter (51) das zweite Übertragungselement (53) antreibt, um bei Drehung des zweiten Exzenters (51) das zweite Übertragungselement (53) in der Lieferrichtung (15) hin und her zu bewegen.
  13. Die Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass das zweite Übertragungselement (53) ein zweiter Rahmen ist, wobei der zweite Exzenter (51) innerhalb des zweiten Rahmens angeordnet ist, und wobei insbesondere ein Verschleissschutzring (54) zwischen dem zweiten Exzenter (51) und dem zweiten Rahmen vorgesehen ist.
  14. Webmaschine umfassend eine Vorrichtung (1) nach einem der Ansprüche 1 bis 13.
  15. Verfahren zum Klemmen von Schussfäden mit einer Vorrichtung (1) umfassend mindestens eine Klemmeinheit (20, 21), ein Stützelement (16), und ein Öffnerelement (40) mit mindestens einem Finger (41, 42, 43), wobei die mindestens eine Klemmeinheit (20, 21) ein Anschlagelement (26, 27), das fest an dem Stützelement (16) montiert ist, mindestens ein Klemmelement (22, 23, 24, 25), das beweglich an dem Stützelement (16) montiert ist und an einer Seite des Anschlagelements (26, 27) angeordnet ist, und mindestens ein Kraftelement (28, 29) umfasst, wobei das mindestens eine Klemmelement (22, 23, 24, 25) zusammen mit dem Anschlagelement (26, 27) eine Klemme (60, 61, 62, 63) definiert, wobei das Kraftelement (28, 29) die Klemmelemente (22, 23, 24, 25) zum Anschlagelement (26, 27) hin zwingt, wobei die Vorrichtung mindestens zwei Klemmelemente (22, 23, 24, 25), die einer Klemmeinheit (20, 21) oder verschiedenen Klemmeinheiten (20, 21) zugeordnet sind, umfasst, und wobei jedes Klemmelement (22, 23, 24, 25) an dem Stützelement (16) um eine Schwenkachse (17, 18) senkrecht zur Klemmrichtung (14) schwenkbar montiert ist, das Verfahren eine Verschiebung des Stützelements (16) relativ zum Öffnerelement (40) in einer Klemmrichtung (14) umfasst, während das Öffnerelement (40) in einer Betriebsposition angeordnet ist, wobei der mindestens eine Finger (41, 42, 43) mit einem der Klemmelemente (22, 23, 24, 25) interagiert, um zu bewirken, dass das genannte Klemmelement (22, 23, 24, 25) gegen die Kraft des mindestens einen Kraftelements (28, 29) um die Schwenkachse (17, 18) schwenkt, zum Öffnen der zugehörigen Klemme (60, 61, 62, 63).
EP17728879.2A 2016-07-04 2017-06-12 Vorrichtung zum festklemmen von schussfäden Active EP3478882B1 (de)

Applications Claiming Priority (2)

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BE2016/0121A BE1024401B1 (nl) 2016-07-04 2016-07-04 Inrichting voor het klemmen van inslagdraden
PCT/EP2017/064277 WO2018007104A1 (en) 2016-07-04 2017-06-12 Device for clamping weft threads

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EP3478882B1 true EP3478882B1 (de) 2020-11-25

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CN112127034B (zh) * 2020-09-15 2021-10-26 嘉兴市恒丰纺织股份有限公司 一种基于智能制造原理的喷气式织机用压力可调夹纱器

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US4178971A (en) * 1976-08-24 1979-12-18 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Method of and apparatus for inserting weft threads into a jet loom
IT1066091B (it) * 1976-12-27 1985-03-04 Somet Soc Mec Tessile Pinza traente per telai di tessitura ad alimentazione continua della trama
JP2762132B2 (ja) 1989-10-04 1998-06-04 津田駒工業株式会社 レピア織機用のよこ入れ装置
BE1006347A3 (nl) 1992-11-16 1994-07-26 Picanol Nv Inrichting voor het presenteren van inslagdraden bij weefmachines.
DE59306205D1 (de) * 1993-09-20 1997-05-22 Rueti Ag Maschf Anordnung zum Vorlegen von Schussfäden
KR980009576A (ko) * 1995-09-29 1998-04-30 이케우찌 마사토 유체직기에 있어서의 씨실송출장치
CN1625619A (zh) * 2002-10-15 2005-06-08 津田驹工业株式会社 纬纱保持装置
BE1019807A3 (nl) * 2011-07-12 2012-12-04 Picanol Inrichting en werkwijze voor het klemmen van een inslagdraad.

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BE1024401A1 (nl) 2018-02-07
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CN109415849A (zh) 2019-03-01
WO2018007104A1 (en) 2018-01-11
EP3478882A1 (de) 2019-05-08

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