WO2017162375A1 - Pince pour métier à tisser à pince - Google Patents

Pince pour métier à tisser à pince Download PDF

Info

Publication number
WO2017162375A1
WO2017162375A1 PCT/EP2017/053477 EP2017053477W WO2017162375A1 WO 2017162375 A1 WO2017162375 A1 WO 2017162375A1 EP 2017053477 W EP2017053477 W EP 2017053477W WO 2017162375 A1 WO2017162375 A1 WO 2017162375A1
Authority
WO
WIPO (PCT)
Prior art keywords
jaw
gripper
profile
mounting part
flank
Prior art date
Application number
PCT/EP2017/053477
Other languages
English (en)
Inventor
Bram DEGRAEVE
Denis Moeneclaey
Original Assignee
Picanol
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 Picanol filed Critical Picanol
Priority to CN201780019725.7A priority Critical patent/CN108884609B/zh
Priority to EP17705413.7A priority patent/EP3433403B1/fr
Publication of WO2017162375A1 publication Critical patent/WO2017162375A1/fr

Links

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 invention relates to a gripper for a gripper weaving machine, a gripper weaving machine and a method for manufacturing a gripper. More particular, the invention relates to a gripper comprising a gripper profile and a clamp with a first jaw and a second jaw for clamping a weft thread between the first jaw and the second jaw.
  • Grippers for gripper weaving machines are disclosed for example in WO 2008/104355 A1 and WO 201 1 /134953 A2. It is known to attach one jaw such that this one jaw is resiliency deformable and/or moveable with respect to the other jaw, which other jaw is attached fixedly in position to the gripper profile, for example by welding this other jaw to the gripper profile.
  • a gripper for a gripper weaving machine comprising a gripper profile and a clamp with a first jaw and a second jaw for clamping a weft thread between the first jaw and the second jaw, wherein the first jaw is attached fixedly in position to the gripper profile, wherein at least a front end of the second jaw is moveable, in particular resiliency deformable, with respect to the first jaw, and wherein the first jaw has a mounting part provided with a slot for pinning the mounting part over the gripper profile.
  • the mounting part is provided with a slot and can be shifted or slid over a respective part of the gripper profile. This allows for a fixed positioning of the first jaw with respect to the gripper profile.
  • a connection between the jaws and the gripper profile has to withstand external forces that arise by opening the clamp in order to clean the clamp, for example for removing thread dust from the clamp, as well as internal forces, this means restoring forces of the second jaw forcing the second jaw towards the first jaw. Further, forces are acting on the connection due to a repeated acceleration and deceleration of the gripper in use as well as vibrations, for example vibrations caused by guiding the rapier in guide elements of the weaving machine.
  • the slot is directed towards a rear end of the gripper in order to avoid that weft threads enter the slot.
  • the slot is directed opposite to the front ends of the jaws where a weft thread enters the clamp, in order to avoid that the weft thread enters the slot.
  • the gripper profile is U-shaped with a top flank, a side flank, and a bottom flank, wherein the slot is adapted for pinning the mounting part over the top flank.
  • the slot for this purpose is adapted to the gripper profile, so that the first jaw can be pinned over a lug of the top flank of the gripper profile.
  • the slot is adapted so that the first jaw can be arranged over the top flank of the gripper profile with a small play or with a press-fit.
  • the mounting part is temporarily deformed for attaching the first jaw over the gripper profile for example by applying heat-shrink techniques.
  • the first jaw is positioned over the gripper profile by means of the slot and, thereafter, welded to the gripper profile, wherein due to the coupling of the first jaw with the gripper profile via the slot, the forces acting in use on a weld line are reduced.
  • the first jaw is removeably and replaceably attached to the gripper profile, wherein the first jaw is fixedly attached to the top flank by means of a screw. This allows replacing the first jaw when necessary, for example due to wear of the first jaw.
  • an upper part of the mounting part functions as a clamping surface for clamping a weft thread.
  • a screw head of the at least one screw is flush with or below said clamping surface of the mounting part of the first jaw.
  • the top flank is provided with a lug, wherein the slot is inserted over the lug of the mounting part for pinning the mounting part over the lug of the top flank.
  • the first jaw is an upper jaw arranged in use above the second jaw.
  • the first jaw is a lower jaw and the second jaw is an upper jaw arranged in use above the lower jaw.
  • the two jaws are independently attached to the gripper profile.
  • the upper jaw and the lower jaw at their rear ends are coupled to each other by means of at least one screw, wherein the top flank of the gripper profile is sandwiched between the rear ends of the upper jaw and the lower jaw.
  • This allows a fixed attachment of the jaws with respect to the gripper profile, and also allows a strengthening of the gripper profile made of a thin plate, as the top flank is sandwiched between the two jaws extending in the longitudinal direction, this means the movement direction of the gripper.
  • At least a front end of the second jaw is resiliency deformable and/or moveable with respect to the first jaw for clamping a weft thread between the jaws.
  • a setting screw is provided in the region of a front end of the second jaw, wherein by means of the setting screw a minimum distance between the second jaw and the first jaw is adjustable. This allows to adjust the initial opening between the jaws.
  • the gripper profile in preferred embodiments is fixedly attached to a rapier for moving the gripper profile with the clamp into and out of a weaving shed.
  • the rapier is for example a gripper band or a rigid gripper rod.
  • a reinforcement rib is provided, wherein the gripper profile is fixedly attached to the reinforcement rib, and attached to the rapier via the reinforcement profile. More particular, in preferred embodiments, the rapier is sandwiched between the bottom flank of the gripper profile and the reinforcement rib.
  • a gripper weaving machine comprising a gripper is provided.
  • a method for manufacturing a gripper for a gripper weaving machine comprising a gripper profile and a clamp with a first jaw and a second jaw for clamping a weft thread between the first jaw and the second jaw
  • the first jaw is attached fixedly in position to the gripper profile
  • the second jaw is attached such that at least a front end of the second jaw is attached resiliency deformable and/or moveable with respect to the first jaw
  • the first jaw has a mounting part provided with a slot, and wherein the mounting part is pinned over the gripper profile.
  • Fig. 1 is a perspective view of a gripper according to the invention
  • Fig. 2 is a top view of the gripper of Fig. 1 ;
  • Fig. 3 is a sectional view along line Il l-I l l of the gripper of Fig. 2;
  • Fig. 4 is an exploded view of the gripper of Fig. 1 ;
  • Fig. 5 is a perspective view of the gripper of Fig. 1 , wherein an upper jaw of a clamp of the gripper is removed;
  • Fig. 6 is an exploded view of a part of the gripper of Fig. 1 .
  • Figs. 1 to 4 show an embodiment of a gripper 1 according to the invention in a perspective view, a top view, a sectional view and an exploded view, respectively.
  • the gripper 1 shown in the figures comprises a gripper profile 2, a clamp 30 with a first jaw 3 and a second jaw 4, and a reinforcement rib 5.
  • the first jaw 3 is also referred to as the lower jaw or fixed jaw
  • the second jaw 4 is also referred to as the upper jaw or moveable jaw.
  • Fig. 5 is a perspective view of the gripper 1 , wherein an upper jaw 4 is removed.
  • the gripper 1 is for example a bringer gripper.
  • the gripper profile 2 is a plate bent into a U-shape with a top flank 6, a side flank 7 and a bottom flank 8.
  • the top flank 6, the side flank 7 and the bottom flank 8 are designed as plate parts of a plate.
  • a weft thread (not shown) can be clamped between the upper jaw 4 and the lower jaw 3 of the clamp 30.
  • the upper jaw 4 is made from a resiliency deformable material, wherein at least a front end 9 of the upper jaw 4 is resiliency deformable and/or moveable with respect to the lower jaw 3 and functions as a leaf spring.
  • the upper jaw 4 is also referred to as leaf spring element.
  • the lower jaw 3 is a rigid element attached over the top flank 6 of the gripper profile 2.
  • a mounting part 10 of the lower jaw 3 is provided with a slot 1 1 , and the lower jaw 3 is pinned over the top flank 6 of the gripper profile 2, wherein two legs 12, 13 of the mounting part 10 provided at opposite sides of the slot 1 1 are arranged at opposite surfaces of the top flank 6.
  • the slot 1 1 is directed towards the rear end of the gripper 1 in order to avoid that weft threads (not shown) accidentally enter the slot 1 1 when moving the gripper 1 into or out of a weaving shed (not shown).
  • the lower jaw 3 is further attached in position by means of a screw 14.
  • a screw head of the screw 14 is flush with or arranged below a clamping surface 32 of the mounting part 10 of the lower jaw 3 directed towards the upper jaw 4.
  • the screw 14 does not interfere with weft threads (not shown) entering the clamp 30 from the front end 34 of the lower jaw 3 and clamped between the upper jaw 4 and the lower jaw 3.
  • the mounting part 10 is arranged near the front end 34 of the lower jaw 3. This makes a fixed positioning of the clamping surface 32 of the lower jaw 3 with respect to the top flank 6 possible.
  • the top flank 6 of the gripper profile 2 is provided with a lug 15 projecting away from the side flank 7, wherein the mounting part 10 of the lower jaw 3 is attached over said lug 15.
  • the lug 15 is inserted into the slot 1 1 .
  • the lower jaw 3 and the upper jaw 4 at their rear ends 16, 17 are coupled to each other by means of two screws 18.
  • the screws 18 are inserted from above and extend via two conical holes 19 provided at the rear end 17 of the upper jaw 4 and are screwed into two threaded holes 20 provided at the rear end 16 of the lower jaw 3.
  • a first of these two screws 18 further extends via a through hole 21 provided at the top flank 6, whereas in the embodiment shown, the second of these two screws 18 does not intersect the top flank 6.
  • a further through hole is provided in the top flank 6 for the second of these two screws 18.
  • the top flank 6 is sandwiched between the rear end 17 of the upper jaw 4 and the rear end 16 of the lower jaw 3 for attaching the clamp 30 to the top flank 6 of the gripper profile 2.
  • the front end of the upper jaw 4 remains resiliency deformable and/or moveable with respect to the lower jaw 3 for clamping a weft thread (not shown) between the two jaws 3, 4.
  • a setting screw 22 is screwed in the region of a front end of the upper jaw 4, which contacts a top surface of the top flank 6, such that by means of the setting screw 22 a minimum distance between the upper jaw 4 and the lower jaw 3 is adjustable.
  • the gripper is attached to a rapier 35.
  • the gripper 1 further comprises the reinforcement rib 5, wherein the gripper profile 2 is fixedly attached to the reinforcement rib 5.
  • the reinforcement rib 5 is attached via the rapier 35 to a top surface of the bottom flank 8 by means of at least two fastening screws 23 and a screw 36.
  • the screws 23 extend successively through the conical holes 24 provided at the bottom flank 8 of the gripper profile 2 and the conical holes 37 provided at the rapier 35 to be screwed into screw holes 25 provided in the reinforcement rib 5.
  • the screw 36 extends successively through a conical hole 24 provided at the bottom flank 8, a conical hole 37 provided at the rapier 35 and through a through hole 26 provided in the reinforcement rib 5 to be screwed into a screw hole 33 provided in the lower jaw 3.
  • a further through hole 27 is provided in the top flank 6 allowing the screw 36 entering the top flank 6. Due to this, the rapier 35 is sandwiched between the reinforcement rib 5 and the bottom flank 8 of the gripper profile 2 by means of the screws 23 and the screw 36.
  • the top flank 6 of the gripper profile 2 in addition is attached to the reinforcement rib 5, the fixation of the gripper profile 2 to the reinforcement rib 5 is improved.
  • the rapier 35 is attached to the reinforcement rib 5 by means of additional screws 38 extending through conical holes 37 in the rapier 35, which screws 38 are screwed into screw holes 25 provided in the reinforcement rib 5.
  • the gripper profile 2 is less subjected to deformations, so that a risk of a break due to fatigue is further reduced.
  • the upper jaw 4 is provided with two curved end portions 28, which are arranged in openings 29 of the top flank 6. This rules out the risk of the upper jaw 4 damaging warp threads when the gripper 1 is moved through a weaving shed.
  • the bottom flank 8 of the gripper profile 2 is further provided with a positioning element 31 , wherein a weft thread (not shown) can be positioned between the clamp 30 formed by the upper and the lower jaw 3, 4 and the positioning element 31 , as described for example in WO 2008/104355 A1 , the content of which is herewith incorporated by reference.
  • the gripper 1 is easy to manufacture by arranging a first jaw 3 over the top flank 6 of the gripper profile 2. As indicated in Fig. 6 with arrow P, the slot 1 1 of the mounting part 10 is shifted or slid over the lug 15 of the gripper profile 2, this means that the lug 15 of the gripper profile 2 is arranged between the legs 12, 13 forming the slot 1 1 of the mounting part 10. This allows an exact and fixed positioning of the first jaw 3 with respect to the gripper profile 2. Furthermore, this allows an exact positioning of the first jaw 3 with respect to the second jaw 4. Thereafter the first jaw 3 can be secured or pinned over the top flank 6 of the gripper profile 2 by means of the screw 14 extending through the through hole 39 in the lug 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

L'invention concerne une pince pour un métier à tisser à pince comprenant un profil de pince (2) et un élément de serrage (30) doté d'une première mâchoire (3) et d'une seconde mâchoire (4) pour serrer un fil de trame entre la première mâchoire (3) et la seconde mâchoire (4), la première mâchoire (3) étant attachée fixement en position au profil de pince (2), une extrémité avant (9) de la seconde mâchoire (4) étant mobile par rapport à la première mâchoire (3), et la première mâchoire (3) comportant une partie de montage (10) pourvue d'une fente (11) pour ancrer la partie de montage (10) sur le profil de pince (2). L'invention concerne également une machine à tisser à pince et le procédé de fabrication d'une telle pince (1).
PCT/EP2017/053477 2016-03-25 2017-02-16 Pince pour métier à tisser à pince WO2017162375A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780019725.7A CN108884609B (zh) 2016-03-25 2017-02-16 用于片梭织机的片梭
EP17705413.7A EP3433403B1 (fr) 2016-03-25 2017-02-16 Pince pour métier à tisser à pince

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2016/0056 2016-03-25
BE2016/0056A BE1023978B1 (nl) 2016-03-25 2016-03-25 Grijper voor een grijperweefmachine

Publications (1)

Publication Number Publication Date
WO2017162375A1 true WO2017162375A1 (fr) 2017-09-28

Family

ID=55802097

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/053477 WO2017162375A1 (fr) 2016-03-25 2017-02-16 Pince pour métier à tisser à pince

Country Status (4)

Country Link
EP (1) EP3433403B1 (fr)
CN (1) CN108884609B (fr)
BE (1) BE1023978B1 (fr)
WO (1) WO2017162375A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876273A1 (fr) * 2006-07-07 2008-01-09 SCHÖNHERR Textilmaschinenbau GmbH Lance, son procédé de fabrication, dispositif d'insertion de fils de trame comprenant une telle lance et métier à tisser comprenant un tel dispositif
WO2008104355A1 (fr) 2007-02-26 2008-09-04 Picanol N.V. Métier à tisser à pince muni d'une pince d'amenée et d'un guide déflecteur
WO2011134953A2 (fr) 2010-04-29 2011-11-03 Picanol Lance et machine à tisser à pince

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000005448A (ko) * 1996-04-19 2000-01-25 쉬테베르링크 미헬, 쉬테베르링크 파트릭 직조기 그리퍼의 그리퍼 고정부의 개방을 위한 장치2
IT1303764B1 (it) * 1998-11-17 2001-02-23 S M I T S R L Societa Macchine Pinza di condotti per telai senza navetta particolarmente adatta perl'introduzione contemporanea di piu' trame nella bocca di ordito
BE1018116A3 (nl) * 2008-05-07 2010-05-04 Picanol Nv Nemergrijper, gevergrijper en inrichting voor een grijperweefmachine.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876273A1 (fr) * 2006-07-07 2008-01-09 SCHÖNHERR Textilmaschinenbau GmbH Lance, son procédé de fabrication, dispositif d'insertion de fils de trame comprenant une telle lance et métier à tisser comprenant un tel dispositif
WO2008104355A1 (fr) 2007-02-26 2008-09-04 Picanol N.V. Métier à tisser à pince muni d'une pince d'amenée et d'un guide déflecteur
WO2011134953A2 (fr) 2010-04-29 2011-11-03 Picanol Lance et machine à tisser à pince

Also Published As

Publication number Publication date
CN108884609A (zh) 2018-11-23
BE1023978A1 (nl) 2017-09-27
BE1023978B1 (nl) 2017-09-28
CN108884609B (zh) 2020-03-17
EP3433403B1 (fr) 2019-12-18
EP3433403A1 (fr) 2019-01-30

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