EP0725172A1 - Projectile à griffes pour un métier à tisser - Google Patents

Projectile à griffes pour un métier à tisser Download PDF

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Publication number
EP0725172A1
EP0725172A1 EP95810064A EP95810064A EP0725172A1 EP 0725172 A1 EP0725172 A1 EP 0725172A1 EP 95810064 A EP95810064 A EP 95810064A EP 95810064 A EP95810064 A EP 95810064A EP 0725172 A1 EP0725172 A1 EP 0725172A1
Authority
EP
European Patent Office
Prior art keywords
housing
weft thread
projectile according
clamp
legs
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Withdrawn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
EP95810064A
Other languages
German (de)
English (en)
Inventor
Josef Kaufmann
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.)
Itema Switzerland Ltd
Maschinenfabrik Rueti AG
Original Assignee
Sultex AG
Maschinenfabrik Rueti AG
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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Priority to EP95810064A priority Critical patent/EP0725172A1/fr
Priority to US08/573,473 priority patent/US5632309A/en
Publication of EP0725172A1 publication Critical patent/EP0725172A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • D03J5/06—Dummy shuttles; Gripper shuttles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44641—Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member
    • Y10T24/44684—Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member with operator for moving biased engaging face
    • Y10T24/44692—Camming or wedging element

Definitions

  • the invention relates to a rapier projectile for a loom according to the preamble of claim 1 and a loom with a rapier projectile.
  • Claw projectiles of this type are known.
  • the clamping force of the weft thread clamp is set in a separate process prior to the assembly of the projectile. This results in great effort and high manufacturing costs.
  • the invention has for its object to improve a gripper projectile for a weaving machine, so that the setting of the clamping force is not necessary or is at least significantly simplified.
  • a section is formed on the legs, which biases the legs against one another when the weft thread clamp is inserted into the housing.
  • an auxiliary element is provided in order to pretension the legs against one another before the weft thread clamp is inserted into the housing.
  • the housing, the weft thread clip and the connecting element are made of fiber-reinforced plastic. Due to the low natural vibration frequency, the transverse vibrations caused by the impact of the accelerator lever and the lateral impacts in the guide channel or when it arrives in the safety brake are largely avoided, so that weft errors due to thread losers do not occur or only occasionally.
  • this gripper projectile has a low mass, so that the acceleration torque and consequently the braking force can be reduced. Overall, this results in a better energy balance and the possibility to process fine and low-tear weft yarns without problems.
  • the gripper projectile contains a housing 1, a weft thread clamp 2 arranged in the housing and a connecting element 3 which connects the housing 1 to the weft thread clamp 2.
  • the housing 1 is, for. B. formed as a hollow body closed on one side and has a typical shape for gripper projectiles.
  • the cavity has a rectangular cross section.
  • a first hole 6 for receiving the connecting element 3 and a second hole 7 for introducing an opening element for the weft thread clamp 2 are provided, each of which penetrate the opposite side walls.
  • a recess 8 is provided in each of the side walls in the region of the open end of the cavity.
  • the weft thread clamp consists of two legs 11 and a yoke 12. At the free leg ends, inwardly directed sections 13 are formed, which form the clamping jaws for the weft thread. Each leg has a section 14 which protrudes from the outside of the leg.
  • the weft thread clip consists of an elastically deformable material, so that the legs 11 can be biased against one another while deforming the yoke 12.
  • the connecting element 3 has a round cross section and is designed such that it is press-fitted to the Housing 1 and the weft thread clip 2 connected and with its end faces is flush with the surface of the housing 1.
  • the housing 1 and the weft thread clip 2 can consist of metal or non-metal.
  • the housing 1, the weft thread clamp 2 and the connecting element 3 are made of fiber-reinforced plastic.
  • the housing 1 is a one-piece body, which is produced by an injection or pressing process and consists of thermoplastic or thermosetting plastic. Fibers made of carbon, aramid, glass or metal inserts are used as reinforcements.
  • the weft thread clip 2 is a one-piece body, which consists of layered plastic and by mechanical processing z.
  • B. water jet cutting is made of a plastic plate, or which is produced by an injection or pressing process and consists of thermoplastic or thermosetting plastic. Fibers made of carbon, aramid, glass or metal inserts are used as reinforcements.
  • the connecting element is designed like a pin, the fiber reinforcement being aligned in the axial direction.
  • the weft thread clamp z. B. be produced by water jet cutting, so that the body is tension-free.
  • the sections 14 are identical with respect to the line of symmetry 15 of the weft thread clip and dimensioned such that when the weft thread clip is inserted into the cavity of the housing 1, these sections 14 come into contact with the wall of the housing, so that the legs 11 of the Weft thread clamp 2 is biased against one another and the clamping jaws 13 are pressed against one another. Due to the dimensional design of the sections 14, the clamping force can be determined and the clamping force is automatically set by inserting the clip.
  • FIG. 4 shows another embodiment of the weft thread clamp in an exploded view.
  • the clamping force is adjusted before installation in the housing.
  • a sleeve 15 is provided which is pushed over the yoke 12.
  • the legs 12 are pressed together in the same way as in the embodiment described above, and thus the clamping force is set.
  • a yoke 16 is designed in such a thickness that the surface of the pushed-on sleeve 15 is flush with the surface 17 of the legs.
  • the weft thread clamp 2 is inserted together with the sleeve 15 into the housing 1 and fastened in the housing 1 by the connecting element 3.
  • a hole 18 is provided in the opposite walls of the sleeve 15.
  • the clamping force can be determined by the dimensional design of the sections of the legs adjoining the yoke, and the clamping force is automatically set by pushing on the sleeve.
  • each leg has a first recess and a second recess arranged downstream thereof, which are formed on the opposite inner sides of the legs and thus form openings 21 and 22.
  • an opening element not shown, is inserted into the second opening. This releases the clamping force and releases the weft.
  • the second recess 22 with a protective agent z. B. cover member 24 or a covering to prevent material removal by the opening member and consequently to extend the life of the gripper projectile.
  • a protective means can also be provided on the jaws 13.
  • the gripper projectile has a housing 1, a weft thread clamp 2 and a connecting element 3 in order to connect the housing and the weft thread clamp. Furthermore, means 14, 15 are provided in order to pretension the clamp legs in order to generate a predetermined clamping force, the clamping force being set automatically when the weft thread clamp is installed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP95810064A 1995-02-01 1995-02-01 Projectile à griffes pour un métier à tisser Withdrawn EP0725172A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95810064A EP0725172A1 (fr) 1995-02-01 1995-02-01 Projectile à griffes pour un métier à tisser
US08/573,473 US5632309A (en) 1995-02-01 1995-12-15 Gripper projectile for a weaving machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95810064A EP0725172A1 (fr) 1995-02-01 1995-02-01 Projectile à griffes pour un métier à tisser

Publications (1)

Publication Number Publication Date
EP0725172A1 true EP0725172A1 (fr) 1996-08-07

Family

ID=8221693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810064A Withdrawn EP0725172A1 (fr) 1995-02-01 1995-02-01 Projectile à griffes pour un métier à tisser

Country Status (2)

Country Link
US (1) US5632309A (fr)
EP (1) EP0725172A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR771901A (fr) * 1933-06-17 1934-10-19 Tefag Textil Finanz Ag Navette à griffe
NL6715528A (fr) * 1966-11-22 1968-05-24
FR2189554A1 (fr) * 1972-05-26 1974-01-25 Sulzer Ag

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT55548B (de) * 1911-02-18 1912-09-25 Pick & Fleischner Fa Krawattenhalter.
CH472524A (de) * 1967-03-08 1969-05-15 Sulzer Ag Greiferschützen mit Einlagen für Webmaschinen
US3845521A (en) * 1972-06-12 1974-11-05 D Mcnichol Resilient devices for temporarily binding and gripping the edge of materials
GB1426245A (en) * 1973-03-09 1976-02-25 Judge Int Ltd Line gripping pegs
CH571086A5 (fr) * 1973-10-23 1975-12-31 Sulzer Ag
SE450991B (sv) * 1981-11-30 1987-08-24 Klas Arne Pettersson Anordning for fastspenning av en part av ett dukunderlag vid ett fast underlag eller vid en annan part av dukmaterial
DE3441302C1 (de) * 1984-11-12 1986-04-10 Guido, Jürgen, Dipl.-Ing., 8402 Neutraubling Rohrschelle aus federelastischem Werkstoff

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR771901A (fr) * 1933-06-17 1934-10-19 Tefag Textil Finanz Ag Navette à griffe
NL6715528A (fr) * 1966-11-22 1968-05-24
FR2189554A1 (fr) * 1972-05-26 1974-01-25 Sulzer Ag

Also Published As

Publication number Publication date
US5632309A (en) 1997-05-27

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