EP0633337B1 - Pince pour ensemble d'amenée de trame sur une machine à tisser - Google Patents

Pince pour ensemble d'amenée de trame sur une machine à tisser Download PDF

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Publication number
EP0633337B1
EP0633337B1 EP94420193A EP94420193A EP0633337B1 EP 0633337 B1 EP0633337 B1 EP 0633337B1 EP 94420193 A EP94420193 A EP 94420193A EP 94420193 A EP94420193 A EP 94420193A EP 0633337 B1 EP0633337 B1 EP 0633337B1
Authority
EP
European Patent Office
Prior art keywords
lever
weft
clamp
retaining device
levers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94420193A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0633337A1 (fr
Inventor
Didier Réidence Duplessis Marizy
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.)
ICBT Diederichs SAS
Original Assignee
ICBT Diederichs SAS
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 ICBT Diederichs SAS filed Critical ICBT Diederichs SAS
Publication of EP0633337A1 publication Critical patent/EP0633337A1/fr
Application granted granted Critical
Publication of EP0633337B1 publication Critical patent/EP0633337B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to an improved clamp, for a set of gripping and feeding the weft on a positive transfer weaving machine, using insertion members such as lances or ribbons provided with clamps at their ends, with exchange of the weft from one clamp to another in the middle of the fabric being formed.
  • the weft is taken and clamped by its end in the clamp of the lance or of the ribbon situated on the side of the feed, and usually it is furthermore held on this clamp by a retaining device, in order to be presented in good condition to the pulling pliers carried by the other lance or ribbon.
  • a first known retaining device see in particular FR-A-1,595,579 and 2,048,284 is a simple fixed fork, located on the side of the clamp opposite the device carrying out the gripping and tightening of the frame. This fork guides the frame without trapping it.
  • the drawback of this retaining device lies in the fact that the inertia of the frame causes it to leave its position in the exchange phase, due to the formation of a wire loop.
  • a second known retaining device created to overcome the drawback of the first, comprises a single locking lever, the pivoting of which is controlled simultaneously with the opening-closing of the clamp itself.
  • the locking lever thus cooperates with a fixed counterpart, to effectively hold the frame when it is clamped in the clamp.
  • the drawback of this second device lies in its limits of use, in particular in its inability to adapt to very large wefts or fancy yarns.
  • the present invention aims to eliminate this last drawback, by providing a clamp with improved retaining device, applicable in particular to very large wefts or fancy yarns.
  • the subject of the invention is essentially a clamp for weft feeding assembly on a weaving machine, of the kind indicated in the introduction, this clamp which brings the weft to the exchange point comprising, in addition to a device main weft clamping device, a weft retaining device located on the side of the main weft clamping device, the weft retaining device comprising a first lever mounted pivoting along a transverse axis, a second lever pivotally mounted substantially in the same plane as the first along a transverse axis, and means for controlling the simultaneous pivoting and in opposite directions of the two levers, in the direction of their separation in synchronism with the opening of the main clamping device, and in the direction of their approximation in synchronism with the closing of the main clamping device, the two levers being shaped towards their respective free ends, to provide a free passa important to the weft in the open position, and to completely surround the weft in the closed position.
  • the invention provides a double lever mechanism, offering in the open position a greater free passage for the grip of the frame by the retaining device, while ensuring a total maintenance of the frame in the closed position.
  • the two levers of the weft retaining device are pivotally mounted along separate transverse axes, located one in front of the other, the pivot axis of the first lever being common with that of a lever of the main clamping device and these two levers being linked in rotation, while the axis pivoting of the second lever of the retaining device is located at an intermediate point of this lever, which is mechanically linked to the first lever by the cooperation of a drive shaft and a hole, the drive shaft being carried by the first lever, at an intermediate point, and the hole crossed by this axis being formed in the posterior region of the second lever, or vice versa.
  • the first lever of the retainer is directly controlled by the main lever of the clamp, and the second lever of the retainer is itself actuated from the first lever of the retainer, by a very simple and inexpensive mechanism. cumbersome ensuring the reversal of the direction of pivoting.
  • the first lever of the weft retaining device has, towards its free end, a notch open in the direction of the free end of the second lever, which comprises a cut whose edge partially covers the 'notch in closed position, to define a kind of eyelet crossed by the frame.
  • the clamp shown in the drawing comprises an elongated body 1 shown partially, intended to be fixed to a end of a lance or a ribbon situated on the side of the feed of the weft 2.
  • This clamp thus serves to take the end of the weft 2, and to drive it to the middle of the fabric being formed, where an exchange takes place with another clamp not directly concerned by the present invention.
  • the body 1 of the clamp comprises, at its front end, means for gripping the frame 2 comprising a fixed jaw 3 and a movable jaw 4, located opposite one another.
  • the movable jaw 4 is carried by the front end of a main lever 5, pivotally mounted around a transverse axis 6.
  • the rear end of the lever 5 is biased by a spring (not shown) in the closing direction of the clamp, that is to say of the approximation of the jaws 3 and 4.
  • the cooperation of the rear end of the lever 5 with a fixed cam makes it possible to control the opening of the clamp, with the jaws 3 and 4 moving away , against the action of the aforementioned jurisdiction.
  • the weft retaining device is located on the side of the clamp itself. This retaining device 7 maintains the frame 2 at a point 8, located behind point 9 clamped between the jaws 3 and 4, so that between the two points 8 and 9, the frame 2 has a section transverse 10, oriented obliquely, facilitating its recovery by the other clamp.
  • the retaining device 7 comprises an upper lever 11 and a lower lever 12, the respective arms of which in the form of blades, situated substantially in the same plane, are placed under a lateral part 13, also in the form of a blade, which is fixed. that is to say, integral with the body 1 of the clamp.
  • the upper lever 11 comprises a split hub 14, mounted around the axis 6 of the aforementioned main lever 5, and immobilized in rotation on this axis 6 by means of a clamping screw 15. Near its free end and on its edge lower, the upper lever 11 has a notch 16 open downwards.
  • the lower lever 12 is pivotally mounted, on the fixed lateral part 13, around an intermediate axis 17 parallel to the axis 6 and situated in front of the latter.
  • the free front end of the lower lever 12 has a special cutout 18, open towards the front and upwards.
  • the lower lever 12 is linked to the upper lever 11 by means of a small transverse axis 19 passing through a slightly elongated hole 20, the axis 19 being integral with the upper lever 11 and the hole 20 being formed in the lever lower 12, or vice versa.
  • the upper lever 11 of the retaining device 7 is linked in rotation with the main lever 5 of the clamp, via the axis 6, and it thus describes the same pivoting movements as the main lever 5.
  • the connection by the axis 19 and the hole 20, between the two levers 11 and 12 of the retaining device 7, imposes on the lower lever 12 pivoting movements around the axis 17, in the opposite direction of rotation from that common to the main lever 5 and the upper lever 11.
  • notch 16 of the upper lever 11 is located in correspondence with the cutout 18 of the lower lever 12.
  • the main lever 5 When the clamp itself must be brought into the open position for gripping the frame 2 (FIGS. 1 and 3), the main lever 5 is pivoted so that the movable jaw 4 is spaced from the fixed jaw 3. At this angular position of the main lever 5, it corresponds to a raised position of the upper lever 11 of the retaining device 7. Due to the connection provided by the pin 19 and the hole 20, the raising of the upper lever 11 is accompanied by a lowering of the lever lower 12 of retainer 7, which pivots about its axis 17. The notch 16 of the upper lever 11 is then removed from the cutout 18 of the lower lever 12.
  • the retainer 7 is wide open, and it can easily receive the frame 2, at the same time as it engages between the two jaws 3 and 4 of the clamp to be gripped.
  • the main lever 5 In the closed position for bringing towards the exchange point (FIGS. 2 and 4), the main lever 5 is pivoted so that the weft 2 is clamped at point 9 between the two jaws 3 and 4. At this angular position of the main lever 5, it corresponds to a lowered position of the upper lever 11 of the retaining device 7. Due to the connection provided by the pin 19 and the hole 20, the lowering of the upper lever 11 is accompanied by a raising of the lower lever 12 of the retainer 7, which pivots around its axis 17. The two levers 11 and 12 then partially overlap, and the notch 16 of the upper lever 11 is partially covered by the edge of the cutout 18 of the lower lever 12. A kind of eyelet 21 is therefore formed, which is crossed by the frame 2, which is thus surrounded on all sides and perfectly retained at its point 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
EP94420193A 1993-07-09 1994-07-08 Pince pour ensemble d'amenée de trame sur une machine à tisser Expired - Lifetime EP0633337B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308725 1993-07-09
FR9308725A FR2707304B1 (fr) 1993-07-09 1993-07-09 Pince pour ensemble d'amenée de trame sur une machine à tisser.

Publications (2)

Publication Number Publication Date
EP0633337A1 EP0633337A1 (fr) 1995-01-11
EP0633337B1 true EP0633337B1 (fr) 1997-04-23

Family

ID=9449288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94420193A Expired - Lifetime EP0633337B1 (fr) 1993-07-09 1994-07-08 Pince pour ensemble d'amenée de trame sur une machine à tisser

Country Status (4)

Country Link
EP (1) EP0633337B1 (es)
DE (1) DE69402767T2 (es)
ES (1) ES2101471T3 (es)
FR (1) FR2707304B1 (es)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1595579A (es) * 1967-09-19 1970-06-15
FR2048284A5 (en) * 1969-12-17 1971-03-19 Dornier Gmbh Lindauer Shuttleless weaving loom

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2202964B1 (es) * 1972-10-17 1975-03-28 Alsacienne Constr Meca
GB1460889A (en) * 1972-12-14 1977-01-06 Mackie & Sons Ltd J Shuttleless looms
GB1468819A (en) * 1973-06-15 1977-03-30 Mackie & Sons Ltd J Looms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1595579A (es) * 1967-09-19 1970-06-15
FR2048284A5 (en) * 1969-12-17 1971-03-19 Dornier Gmbh Lindauer Shuttleless weaving loom

Also Published As

Publication number Publication date
DE69402767T2 (de) 1998-02-05
EP0633337A1 (fr) 1995-01-11
FR2707304B1 (fr) 1995-08-11
DE69402767D1 (de) 1997-05-28
ES2101471T3 (es) 1997-07-01
FR2707304A1 (fr) 1995-01-13

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