EP1696059A2 - Pince - Google Patents

Pince Download PDF

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Publication number
EP1696059A2
EP1696059A2 EP06250982A EP06250982A EP1696059A2 EP 1696059 A2 EP1696059 A2 EP 1696059A2 EP 06250982 A EP06250982 A EP 06250982A EP 06250982 A EP06250982 A EP 06250982A EP 1696059 A2 EP1696059 A2 EP 1696059A2
Authority
EP
European Patent Office
Prior art keywords
gripper
yarn
jaw
gripper jaw
define
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Withdrawn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
EP06250982A
Other languages
German (de)
English (en)
Other versions
EP1696059A3 (fr
Inventor
John Dalton Griffith Textile Machines Griffith
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.)
Griffith Textile Machines Ltd
Original Assignee
Griffith Textile Machines 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 Griffith Textile Machines Ltd filed Critical Griffith Textile Machines Ltd
Publication of EP1696059A2 publication Critical patent/EP1696059A2/fr
Publication of EP1696059A3 publication Critical patent/EP1696059A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/02—Axminster looms, i.e. wherein pile tufts are inserted during weaving
    • D03D39/08—Gripper Axminster looms

Definitions

  • the present invention relates to a gripper for an Axminster gripper loom.
  • the invention also relates to an Axminster gripper loom incorporating the gripper, a method of picking-up a tail of yarn in an Axminster gripper loom and a method of weaving a carpet.
  • An Axminster gripper loom includes a row of grippers each of which collects a tuft of yarn from a yarn supply and transfers the tuft to a weaving position of the loom for weaving into a carpet.
  • each gripper undergoes a cycle of motion, which involves the gripper moving to the yarn supply, then to the weaving position, and then returning to the yarn supply.
  • the gripper When at the yarn supply, the gripper undergoes a closing operation in order to grip a tuft of yarn.
  • the gripper remains in its closed position as it moves to the weaving position and then undergoes an opening operation to release the tuft after is has been caught in the carpet weave.
  • the grippers In an Axminster loom, the grippers automatically move through the cycle of motion and opening and closing operations normally under the direct motive drive from the main drive shaft of the loom.
  • Each gripper includes a gripper body and a gripper jaw pivotally connected to the gripper body by means of pivot.
  • the pivot is commonly provided in the form of a rivet pin, which permits pivotal movement of the gripper jaw relative to the gripper body to open and close the gripper jaw.
  • the rivet pin can become loose, thereby allowing the gripper jaw to twist relative to the gripper body and/or fall apart. This leads to failure of the gripper.
  • a gripper for an Axminster gripper loom comprising a gripper body and a gripper jaw, the gripper body and gripper jaw being formed to define mutually engageable connectors to pivotally connect the gripper jaw to the gripper body.
  • a plurality of such grippers may be used in an Axminster gripper loom.
  • a gripper for an Axminster gripper loom comprising a gripper body and a gripper jaw, the gripper jaw being pivotally connected to the gripper body and being formed to define a resilient lever to increase the gripping force of the gripper when actuated.
  • a plurality of such grippers may be used in an Axminster gripper loom.
  • a method of picking up a tail of yarn and withdrawing a predetermined length of the yarn from a yarn carrier in an Axminster gripper loom comprising the steps of:
  • a method of picking up a tail of yarn and withdrawing a predetermined length of the yarn from a yarn carrier in an Axminster gripper loom comprising the steps of:
  • Either of these methods of picking up a tail of yarn and withdrawing a predetermined length of the yarn from a yarn carrier may be used in a method of weaving a carpet comprising the steps of:
  • a gripper 10 according to an embodiment of the invention is shown in Figure 1.
  • the gripper 10 includes a gripper body 12 and a gripper jaw 14 pivotally connected to the gripper body 12 by means of a pivot 16 for movement between an open position (Figure 1) and a closed position ( Figure 2) to enable the gripper 10 to grip a yarn 54.
  • the gripper body 12 ( Figure 3) is a generally planar member formed to define a fixing portion 18 to mount the gripper 10 in an Axminster loom (not shown). At its other end, the gripper body 12 defines a gripping portion 20 and, between the two ends, a web portion 22 is provided on which a stud 24 is preferably formed.
  • Two staggered recesses 26,28 are preferably formed on the opposite faces 30,32 of the gripper body 12 between the web portion 22 and the gripping portion 20.
  • the gripper jaw 14 ( Figure 4) is also a generally planar member formed to define a connection portion 34 to engage a mechanical drive means (not shown), which, in use, controls the opening operation of the gripper 10.
  • a mechanical drive means (not shown), which, in use, controls the opening operation of the gripper 10.
  • the gripper jaw 14 defines a gripping portion 36 and, between the two ends, a web portion 38 is provided in which an aperture 40 is preferably formed.
  • the gripper jaw 14 is also preferably shaped to define two staggered tongues 42,44 protruding laterally from opposite faces 46,48 of the gripper jaw 14 between the web portion 38 and the gripping portion 36.
  • the gripper body 12 and the gripper jaw 14 are preferably formed from a hardened and tempered spring steel.
  • the stud 24 is preferably formed by removing material from the gripper body 12 to define the web portion 22 having a stud 24 protruding therefrom.
  • the web portions 22,38 on the gripper body 12 and the gripper jaw 14 are preferably located such that on assembly of the gripper 10, the stud 24 formed on the web portion 22 of the gripper body 12 is aligned with the aperture 40 formed in the web portion 38 of the gripper jaw 14.
  • the tongues 42,44 protruding from the gripper jaw 14 are also preferably located such that on assembly of the gripper 10. the tongues are aligned with the recesses 26,28 formed in the gripper body 12.
  • the gripper jaw 14 is preferably positioned relative to the gripper body 12 such that the tongues 42,44 are aligned with open ends of the recesses 26,28, and the stud 24 on the gripper body 12 is aligned with the aperture 40 in the gripper jaw 14.
  • the relative shapes of the gripper body 12 and the gripper jaw 14 are preferably chosen such the connection portion 34 of the gripper jaw 14 must overlay the fixing portion 18 of the gripper body 12 in order to align the tongues 42,44, recesses 26,28, stud 24 and aperture 40.
  • the gripper jaw 14 is rotated relative to the gripper body 12 such that each of the tongues 42,44 slide into the respective recesses. This rotation moves the connection portion 34 of the gripper jaw 14 such that it no longer overlies the fixing portion 18 of the gripper body 12 and the stud 24 on the gripper body 12 is received in the aperture 40 formed in the gripper jaw 14. The gripper jaw 14 cannot then be disconnected from the gripper body 12 without twisting the connection portion 34 of the gripper jaw 14 to cause it to overlie the fixing portion 18 of the gripper body 12.
  • the tongues 42,44 slide in and out of the respective recesses 26,28.
  • the lengths of the tongues 42,44 and the respective recesses 26,28 are preferably chosen such that the ends of the tongues 42,44 are retained within the respective recesses 26,28 when the gripper 10 is in its open position.
  • a projection 50 formed on the fixing portion 18 of the gripper body 12 limits pivotal movement of the connection portion 34 of the gripper jaw 14 relative to the gripper body 12 such that the ends of the tongues 42,44 are retained within the respective recesses 26,28 when the gripper 10 is in its open position.
  • the gripper jaw 14 is preferably formed to define a relatively narrow leg portion 52 between the web 34 and the connection portion 34.
  • the leg portion 52 is preferably brought into contact with the projection 50 formed on the gripper body 12.
  • the narrowness of the leg portion 52 allows the leg portion 52 to flex about the projection 50 such that the connection portion 34 may be moved further towards the gripper body 12 to ensure that the gripping portions 20,36 are closed tightly independent of the thickness of the yarn 54 gripped between the gripping portions 20,36.
  • the material from which the gripper jaw 14 is formed is preferably resilient such that the leg portion 52 thereby forms a resilient lever to increase the gripping force of the gripper 10.
  • While the embodiment described with reference to Figures 1-4 include the provision of stud 24 and recesses 26,28 on the gripper body 12 and the provision of recess 40 and tongues 42,44 on the gripper jaw 14, it is envisaged in other embodiments that the stud 24 may be formed on the gripper jaw 14 and the recess 40 may be formed in the gripper body 12. It is also envisaged in other embodiments that the recesses 26.28 may be formed in the gripper jaw 14 and that the tongues 42,44 may be formed on the gripper body 12.
  • a plurality of grippers 10 are ananged to pick-up the tails of yarns 54 and withdraw predetermined lengths of the yarn 54 from yarn carriers in the loom.
  • Each gripper 10 having a gripper body 12 and a gripper jaw 14 is moved to position the gripping portions 20,36 of the gripper body 12 and the gripper jaw 14 on opposite sides of a tail of yarn 54 held in a respective yarn carrier.
  • each gripper 10 is driven about a pivotal connection defined by mutually engageable connectors 24,40 formed on the gripper body 12 and the gripper jaw 14 so as to move the gripping portions 20,36 towards one another and thereby close the gripper 10 about the respective tail of yarn Y T .
  • Each gripper 10 is then moved to withdraw a predetermined length of yarn from the respective yarn carrier.
  • grippers 10 may be arranged in an Axminster gripper loom to pick-up the tails of yarns 54 and withdraw predetermined lengths of the yarn 54 from yarn carriers in the loom.
  • each gripper 10 having a gripper body 12 and a gripper jaw 14 is moved to position the gripping portions 20,36 of the gripper body 12 and the gripper jaw 14 on opposite sides of a tail of yarn 54 held in a respective yarn carrier.
  • the gripper jaw 14 of each gripper being formed to define a resilient lever to increase the gripping force of the gripper 10 when actuated, is driven about a pivotal connection between the gripper body 12 and the gripper jaw 14 so as to move the gripping portions 20.36 towards one another and thereby close the gripper 10 about the respective tail of yarn Y T , the gripper jaw 14.
  • Each gripper 10 is then moved to withdraw a predetermined length of yarn from the respective yarn carrier.
  • a plurality of grippers are used to pick-up tails of yarn and withdraw predetermined lengths of the yarn from yarn carriers.
  • Pluralities of yarn 54 are held in a plurality of yarn carriers for selective presentation to the grippers 10, and each of the yarn carriers is moved selectively to present a chosen yarn to a respective one of the grippers 10.
  • Each gripper 10 is then operated to pick-up the tail of the respective chosen yarn 54 and withdraw a predetermine length of the chosen yarn 54 from the respective yarn carrier.
  • each gripper 10 holds a tuft of yarn 54 each gripper 10 then being operated to transfer the tufts of yarn 54 to weaving positions in the carpet where each tuft of yarn 54 is secured in position in the carpet by a weaving process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP06250982A 2005-02-24 2006-02-24 Pince Withdrawn EP1696059A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0503792A GB0503792D0 (en) 2005-02-24 2005-02-24 A gripper

Publications (2)

Publication Number Publication Date
EP1696059A2 true EP1696059A2 (fr) 2006-08-30
EP1696059A3 EP1696059A3 (fr) 2008-12-17

Family

ID=34401221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06250982A Withdrawn EP1696059A3 (fr) 2005-02-24 2006-02-24 Pince

Country Status (2)

Country Link
EP (1) EP1696059A3 (fr)
GB (1) GB0503792D0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017448A5 (fr) * 2005-06-28 2008-10-07 Griffith Textile Mach Ltd Pince.
EP3231910A2 (fr) 2016-04-13 2017-10-18 NV Michel van de Wiele Pince pour un métier à tisser à pince et procédé de fabrication d'une telle pince
EP3231909A1 (fr) 2016-04-13 2017-10-18 NV Michel van de Wiele Pince pour un métier à tisser à pince et procédé de fabrication d'une telle pince

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635670A (en) * 1926-02-27 1927-07-12 Shawmut Eng Co Nipper for tuft weaving
GB441938A (en) * 1934-08-03 1936-01-30 John Edward Robinson Improvements in tuft yarn grippers for pile fabric looms
GB915059A (en) * 1960-12-09 1963-01-09 William Hill Kidderminster Ltd Improvements relating to pile yarn end grippers for spool axminster carpet looms
GB1060280A (en) * 1964-10-09 1967-03-01 Frederick Greenwood & Sons Ltd Yarn grippers for axminster and similar looms
GB1064883A (en) * 1965-03-13 1967-04-12 Frederick Greenwood & Sons Ltd Yarn grippers for axminster or similar looms
GB1344978A (en) * 1970-02-24 1974-01-23 Appleby Edmonds Ltd Yarn grippers
GB1352495A (en) * 1969-12-09 1974-05-08 Kenward Specialist Eng Ltd Tuft insertion mechanism for carpet looms
GB1353153A (en) * 1970-05-26 1974-05-15 Brintons Ltd Yarn grippers for carpet looms
EP1365052A1 (fr) * 2002-05-21 2003-11-26 N.V. Michel Van de Wiele Griffe pour métiers à tisser du type axminster à griffes
EP1672104A2 (fr) * 2004-12-16 2006-06-21 Groz-Beckert KG Dispositif à griffes pour métier à tisser du type Axminster

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635670A (en) * 1926-02-27 1927-07-12 Shawmut Eng Co Nipper for tuft weaving
GB441938A (en) * 1934-08-03 1936-01-30 John Edward Robinson Improvements in tuft yarn grippers for pile fabric looms
GB915059A (en) * 1960-12-09 1963-01-09 William Hill Kidderminster Ltd Improvements relating to pile yarn end grippers for spool axminster carpet looms
GB1060280A (en) * 1964-10-09 1967-03-01 Frederick Greenwood & Sons Ltd Yarn grippers for axminster and similar looms
GB1064883A (en) * 1965-03-13 1967-04-12 Frederick Greenwood & Sons Ltd Yarn grippers for axminster or similar looms
GB1352495A (en) * 1969-12-09 1974-05-08 Kenward Specialist Eng Ltd Tuft insertion mechanism for carpet looms
GB1344978A (en) * 1970-02-24 1974-01-23 Appleby Edmonds Ltd Yarn grippers
GB1353153A (en) * 1970-05-26 1974-05-15 Brintons Ltd Yarn grippers for carpet looms
EP1365052A1 (fr) * 2002-05-21 2003-11-26 N.V. Michel Van de Wiele Griffe pour métiers à tisser du type axminster à griffes
EP1672104A2 (fr) * 2004-12-16 2006-06-21 Groz-Beckert KG Dispositif à griffes pour métier à tisser du type Axminster

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017448A5 (fr) * 2005-06-28 2008-10-07 Griffith Textile Mach Ltd Pince.
EP3231910A2 (fr) 2016-04-13 2017-10-18 NV Michel van de Wiele Pince pour un métier à tisser à pince et procédé de fabrication d'une telle pince
EP3231909A1 (fr) 2016-04-13 2017-10-18 NV Michel van de Wiele Pince pour un métier à tisser à pince et procédé de fabrication d'une telle pince
CN107287743A (zh) * 2016-04-13 2017-10-24 米歇尔.范德威尔公司 用于片梭织机的夹纱器
EP3231910A3 (fr) * 2016-04-13 2017-10-25 NV Michel van de Wiele Pince pour un métier à tisser à pince et procédé de fabrication d'une telle pince

Also Published As

Publication number Publication date
GB0503792D0 (en) 2005-03-30
EP1696059A3 (fr) 2008-12-17

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