US3861427A - Carriers for weft insertion by the rapier principle with positive gripping for shuttleless looms - Google Patents

Carriers for weft insertion by the rapier principle with positive gripping for shuttleless looms Download PDF

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Publication number
US3861427A
US3861427A US406868A US40686873A US3861427A US 3861427 A US3861427 A US 3861427A US 406868 A US406868 A US 406868A US 40686873 A US40686873 A US 40686873A US 3861427 A US3861427 A US 3861427A
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US
United States
Prior art keywords
carrier
movable
main portion
control finger
gripper
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US406868A
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English (en)
Inventor
Georges Scheidecker
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.)
Alsacienne de Constructions Mecaniques SA
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Alsacienne de Constructions Mecaniques SA
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Application filed by Alsacienne de Constructions Mecaniques SA filed Critical Alsacienne de Constructions Mecaniques SA
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Expired - Lifetime legal-status Critical Current

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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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • ABSTRACT This invention relates to a carrier for weft insertion by the rapier principle in a shuttleless loom which mounts two independent gripper units and a differential control system operatively connected with said two gripper units.
  • the carrier preferably includes a main portion and a control finger movably mounted on said main portion and adapted to be actuated by a cam
  • each said gripper unit includes a fixed jaw which is an integral part of said main portion of the carrier, and a movable jaw
  • said differential control system includes a swingle bar the two ends of which are engaged one in said movable jaw of each said gripper unit and the central part of which is engaged in said movable control finger.
  • the carrier has two independent gripper units each subjected to an elastic tightening force. There is thus better gripping of the weft yarn or thread, but nonetheless it is dependent on the adjustment of the pressure of the return spring of each of the two grippers; it is particularly in the gripping of the thread as it leaves the weft-insertion carrier that the weaknesses of the device are apparent since the closing of the two grippers is controlled by a cam which releases, on the occasion of closing of the grippers, the springs which had been put under tension by the same cam upon opening of the grippers.
  • this gripper first of all pulls the thick section with the result that the end of the weft thread may escape from the gripper since the other gripper closes with a delay.
  • the object of the invention is to provide a carrier supplying weft-thread with controlled gripping, which includes two independent gripper units, and which does not have the aforementioned disadvantages of the carriers hitherto proposed or known.
  • a carrier for weft insertion by the rapier principle in a shuttleless loom said carrier having two independent gripper units subject to the action of a differential control system for balancing the gripping force at the two grippers.
  • FIG. 1 is an elevation, with cutaway sections, of a first embodiment
  • FIG. 2 is a plan view corresponding to FIG. 1;
  • FIGS. 3 and 4 are transverse sections along the lines III--III and IV--IV, respectively, of FIG. 2;
  • FIG. 5 is an elevation of another embodiment
  • FIG. 6 is a plan view corresponding to FIG. 5;
  • FIGS. 7 and 8 are transverse sections along the lines VII-VII and VIIIVIII, respectively, of FIG. 6.
  • the carrier for weft insertion by the rapier principle with positive gripping for a shuttleless loom shown in particular in FIGS. 1 and 2, comprises a main portion 1 on which are arranged two independent gripper units comprising, respectively, two movable jaws 2 and 3 co operating with two fixed jaws 4 and 5 respectively, which are integral parts of the main portion 1 of the weft-insertion carrier.
  • the two movable jaws 2 and 3 are articulated on a common transverse spindle 8 (see also FIG. 4) supported, by its two extremities, in two lateral cheeks 11 and 12 on the main portion 1 of the carrier.
  • the two movable jaws 2 and 3 are operated by a differential control system including operating means made up by a movable control finger l4 and forcetransmitting means including a swingle bar 15 (see also FIG. 3).
  • the movable control finger 14 comprises a suitably shaped plate also mounted on the spindle 8 between the two movable jaws 2 and 3 of the gripper units so that it can pivot.
  • Between the control finger l4 and the two movable jaws 2 and 3 are interposed spacer disks l8 and 19, respectively, in such a way that the lateral faces of the two jaws 2 and 3 bear against the inter nal faces of the two cheeks 11 and 12 respectively, of the main portion of the carrier and thus suitably guided.
  • the swingle bar 15 comprises a rod, the central part of which is freely engaged in a hole 22 in the movable control finger l4 and the two ends are freely engaged, respectively, in two holes 23 and 24 formed in the two movable jaws 2 and 3.
  • the three holes 22, 23 and 24 are preferably countersunk at both of their ends.
  • the rod 15 is confined, with some play, between the two cheeks 11 and 12 of the main portion of the carrier, in such a way that it is positioned axially without its being necessary to provide any special supplementary means for this purpose.
  • each of these two resilient abutments is formed by a resilient tongue, such as 32 for the movable jaw 3, the root of which is an integral part of the movable jaw 3, while its free extremity comes to bear against the main portion 1 of the carrier at the end of the opening movement of said movable jaw.
  • This tongue is obtained, for example, by simply forming, in the corresponding part of the moving jaw, a slot such as 33.
  • the other movable jaw 2 is furnished with a resilient tongue indentical with the tongue 32 and coinciding with the latter in FIG. 1.
  • a sole-plate 36 for example of wood or fibre, intended to brush against the reed.
  • the operation of the gripper units is as follows:
  • the movable finger 14 Under the action of the spring 27, the movable finger 14 is urged to pivot around the spindle 8 in the direction of the arrow fl (FIG. 1) so that, through the intermediary of the swingle bar 15, it tends to cause the two jaws 2 and 3 of the two gripper units to pivot around the same spindle 8 in the same direction fl; the free ends of said jaws are therefore applied against the associated fixed jaws 4 and with two forces which are always equal owing to the intervention of the swingle bar 15 in the control.
  • the weftinsertion carrier travels in the direction of the arrow f2 to grip and then insert into the shed a weft thread 10
  • the movable control finger 14 comes up against a fixed cam 35 which causes the simultaneous opening of the two grippers.
  • the resilient abutment tongues 32 can absorb differences in the settings of the machine and in the successive strokes of the weft-insertion carrier without damage to the mechanism, while however positioning in a very satisfactory manner the movable jaws 2 and 3 in their maximum opening position.
  • FIGS. 5 to 8 there is shown another embodiment which differs from that of FIGS. 1 to 4 only in that the movable control finger 1411, instead of being articulated on the same spindle as the movable jaws of the grippers, is articulated on a spindle 41 separate from the spindle 8 for pivoting of the jaws.
  • this spindle is mounted in two auxiliary cheeks 42 and 43 integral with the main portion 1 of the carrier.
  • the two movable jaws 2 and 3 of the grippers are positioned axially by a single central tubular spacer 45 engaged over the spindle 8.
  • the mechanism of this modification operates in the same way as that of FIGS. 1 to 4 and enables the arrangement of different leverages between the movable control finger 14 and the movable jaws 2 and 3 of the grippers, depending on the applications envisaged.
  • a carrier for weft insertion by the rapier principle in a shuttleless loom said carrier mounting two independent gripper units; and a differential control system including operating means including a single forcetransmitting means including means for equalizing the gripping force of the two gripper units and which is operatively connected to said two gripper units whereby gripping forces of the gripper units on a weft thread are equalized irrespective of weft thread imperfections.
  • a carrier as set forth in claim 1 including a main portion and a control finger movably mounted on said main portion and adapted to be actuated by a cam, each said gripper unit including a fixed jaw which is an integral part of said main portion of the carrier, and a movable jaw, said differential control system forcetransmitting means comprising a swingle bar including two ends which are respectively engaged in one said movable jaw of each said gripper unit, the central part of the swiggle bar being engaged in said movable control finger.
  • a carrier as claimed in claim 2 including a spring normally urging movement of said movable control finger in the direction to close said gripper units.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US406868A 1972-10-17 1973-10-16 Carriers for weft insertion by the rapier principle with positive gripping for shuttleless looms Expired - Lifetime US3861427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7236658A FR2202964B1 (it) 1972-10-17 1972-10-17

Publications (1)

Publication Number Publication Date
US3861427A true US3861427A (en) 1975-01-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US406868A Expired - Lifetime US3861427A (en) 1972-10-17 1973-10-16 Carriers for weft insertion by the rapier principle with positive gripping for shuttleless looms

Country Status (17)

Country Link
US (1) US3861427A (it)
JP (1) JPS4972465A (it)
AR (1) AR205882A1 (it)
BE (1) BE806149A (it)
BR (1) BR7307912D0 (it)
CA (1) CA994212A (it)
CH (1) CH569815A5 (it)
CS (1) CS184821B2 (it)
DD (1) DD107090A5 (it)
DE (1) DE2352082B2 (it)
ES (1) ES419427A1 (it)
FR (1) FR2202964B1 (it)
GB (1) GB1405209A (it)
IT (1) IT995896B (it)
NL (1) NL7314207A (it)
PL (1) PL89476B1 (it)
SU (1) SU502611A3 (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040454A (en) * 1974-09-23 1977-08-09 Albatex A.G. Drawing gripper for gripping and transporting weft yarns in continuous weft feed looms
US20040040613A1 (en) * 2002-08-30 2004-03-04 Promatech S. P. A. Weft carrying grippers for weaving looms and in guiding means thereof
US7806148B1 (en) * 2009-04-28 2010-10-05 Tsudakoma Kogyo Kabushiki Kaisha Carrier rapier
US7810526B2 (en) * 2009-02-16 2010-10-12 Tsudakoma Kogyo Kabushiki Kaisha Insert rapier
CN102677370A (zh) * 2012-04-20 2012-09-19 张尚勇 一种剑杆织机用剑杆头
CN105200628A (zh) * 2015-10-30 2015-12-30 湖州织里韩衣童社服饰有限公司 一种送纬剑上的夹纱机构
CN105239254A (zh) * 2015-10-30 2016-01-13 湖州织里韩衣童社服饰有限公司 一种剑杆织机的送纬剑
US20170218541A1 (en) * 2016-01-28 2017-08-03 Nike, Inc. Multi-carrier, zonal weaving system, method, and material

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1582326A (en) * 1976-04-09 1981-01-07 Mackie & Sons Ltd J Looms
BE902141A (nl) * 1985-04-09 1985-10-09 Picanol Nv Verbeterde grijpers voor weefmachines.
FR2707304B1 (fr) * 1993-07-09 1995-08-11 Saurer Diederichs Sa Pince pour ensemble d'amenée de trame sur une machine à tisser.
DE102009037127A1 (de) * 2009-08-11 2011-02-17 Lindauer Dornier Gmbh Greiferkopf einer Webmaschine
FR3134253A1 (fr) 2022-03-31 2023-10-06 Nidec Psa Emotors Procédé de pilotage d’un onduleur comprenant la sélection d’un mode de sécurité

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390707A (en) * 1965-05-20 1968-07-02 Nuovo Pignone Spa Weft-carrying mechanism for weaving looms having a continuous weftsupply mechanism
US3695306A (en) * 1969-06-24 1972-10-03 Unitaka Ltd Yarn carrier for a weaving machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390707A (en) * 1965-05-20 1968-07-02 Nuovo Pignone Spa Weft-carrying mechanism for weaving looms having a continuous weftsupply mechanism
US3695306A (en) * 1969-06-24 1972-10-03 Unitaka Ltd Yarn carrier for a weaving machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040454A (en) * 1974-09-23 1977-08-09 Albatex A.G. Drawing gripper for gripping and transporting weft yarns in continuous weft feed looms
US20040040613A1 (en) * 2002-08-30 2004-03-04 Promatech S. P. A. Weft carrying grippers for weaving looms and in guiding means thereof
US6973942B2 (en) * 2002-08-30 2005-12-13 Promatech S.P.A. Weft carrying grippers for weaving looms and in guiding means thereof
US7810526B2 (en) * 2009-02-16 2010-10-12 Tsudakoma Kogyo Kabushiki Kaisha Insert rapier
US7806148B1 (en) * 2009-04-28 2010-10-05 Tsudakoma Kogyo Kabushiki Kaisha Carrier rapier
US20100269949A1 (en) * 2009-04-28 2010-10-28 Tsudakoma Kogyo Kabushiki Kaisha Carrier rapier
CN102677370A (zh) * 2012-04-20 2012-09-19 张尚勇 一种剑杆织机用剑杆头
CN102677370B (zh) * 2012-04-20 2014-11-12 张尚勇 一种剑杆织机用剑杆头
CN105200628A (zh) * 2015-10-30 2015-12-30 湖州织里韩衣童社服饰有限公司 一种送纬剑上的夹纱机构
CN105239254A (zh) * 2015-10-30 2016-01-13 湖州织里韩衣童社服饰有限公司 一种剑杆织机的送纬剑
US20170218541A1 (en) * 2016-01-28 2017-08-03 Nike, Inc. Multi-carrier, zonal weaving system, method, and material
US10145037B2 (en) * 2016-01-28 2018-12-04 Nike, Inc. Multi-carrier, zonal weaving system, method, and material

Also Published As

Publication number Publication date
DE2352082A1 (de) 1974-04-18
FR2202964A1 (it) 1974-05-10
GB1405209A (en) 1975-09-03
DD107090A5 (it) 1974-07-12
IT995896B (it) 1975-11-20
ES419427A1 (es) 1976-04-01
NL7314207A (it) 1974-04-19
BR7307912D0 (pt) 1974-07-25
CS184821B2 (en) 1978-09-15
CH569815A5 (it) 1975-11-28
FR2202964B1 (it) 1975-03-28
DE2352082B2 (de) 1976-09-16
SU502611A3 (ru) 1976-02-05
AR205882A1 (es) 1976-06-15
JPS4972465A (it) 1974-07-12
CA994212A (en) 1976-08-03
BE806149A (fr) 1974-04-16
PL89476B1 (it) 1976-11-30

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