US3472286A - Gripper shuttle - Google Patents

Gripper shuttle Download PDF

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Publication number
US3472286A
US3472286A US710505A US3472286DA US3472286A US 3472286 A US3472286 A US 3472286A US 710505 A US710505 A US 710505A US 3472286D A US3472286D A US 3472286DA US 3472286 A US3472286 A US 3472286A
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US
United States
Prior art keywords
shuttle
gripper
arms
inserts
weft
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
US710505A
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English (en)
Inventor
Arthur Schneider
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.)
Sulzer AG
Original Assignee
Sulzer 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 Sulzer AG filed Critical Sulzer AG
Application granted granted Critical
Publication of US3472286A publication Critical patent/US3472286A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J2700/00—Auxiliary apparatus associated with looms; Weavening combined with other operations; Shuttles
    • D03J2700/10—Shuttles
    • D03J2700/14—Gripper shuttles

Definitions

  • the present invention relates to a gripper shuttle for picking the wefts in looms having a weft supply bobbin remaining outside the shed, the shuttle comprising a resilient weft gripper surrounded by a substantially rigid but hollow shuttle body or casing.
  • the weft gripper is a device comprising two resilient arms which are connected by a yoke and whose free ends carry two jaws and urge these jaws together with a certain prestressing.
  • the shuttle body is generally in the form of a flat, hollow casing surrounding the gripper and screening or shielding it off from the exterior.
  • the yoke of the gripper is attached to the head of the shuttle body inside the shuttle or it may itself form this head.
  • the jaws are at the end of the casing, where it is usually open, and where the jaws are protected from damage from the exterior and where there is enough space inside the casing for the gripper to open and close.
  • the jaws of the weft gripper are separated, for example by inserting a plunger opener between the two resilient arms, through suitable openings in the side walls of the shuttle body.
  • the resilient arms, with the two jaws which are attached to to their ends, are thus parted so that they can receive the end of the weft.
  • a yarn feed having a similarly constructed but movable gripper introduces the weft end between the open jaws of the shuttle gripper, at a recess in the rear end of the shuttle. body. As soon as the plunger opener is withdrawn, the jaws close on the weft and grip it. The yarn feed then releases the weft, and the shuttle is shot through the open shed by the picking motion, while the gripper pulls the weft after it and thereby picks it through the shed.
  • the shuttle is guided in the shed by a series of teeth on the sley which are arranged like a comb. These teeth are for example cut and machined from sheet steel.
  • picking i.e. when the shed is open and the reed has swung back into its position of rest, these teeth project through the warp threads into the shed, During the throw of he reed and the change of shed, they are pivoted out of the shed. On the catching side the shuttle is caught and braked by the catching motion.
  • the shuttle When released, the shuttle is ejected onto a conveying device and returns outside the shed to the picking station, to repeat the cycle. Meanwhile other shuttles the exact number depends on the picking rate, on the weft pattern, and the width of the loom and may be up to 18 shuttles 3,472,286 Patented Oct. 14, 1969 per loom in the case of known looms--have been put through the same cycle an have picked further wefts.
  • the shuttles are usually slightly lubricated by an oil mist before they reach the picking point.
  • residual oil, dust and fluff invariably collect during operation inside the shuttle body, and when the shuttle has been in use for a fairly long period the cavities fill with compact material which interferes with satisfactory operation of the weft gripper, ultimately making picking of the weft uncertain. Since the shuttles used in the loom must therefore be changed and cleaned periodically, each loom requires two sets of shuttles. Cleaning may for example consist in placing the used shuttles in a petroleum bath in order to soften the solidfied residues, whereupon the deposits can be removed with mechanical means such as hooks, scrapers and compressed arr.
  • the resilient arms of the gripper are subjected to mechanical stresses as the gripper is repeatedly operated by the opener, and as the shuttle leaves the picking motion and runs through the track formed by the guide teeth.
  • some vibrations is imposed, especitally on the resilient elements of the shuttle, by intermittent external influences. This vibration may lead to fatigue fractures of the spring gripper arms.
  • a rubber insert should be stuck to the portion of the arms which is subjected to most stress, i.e. to their foot, immediately beside the yoke between the two arms. This insert holds a broken arm inside the shuttle body.
  • the space between the spring arms of the gripper and the inside wall of the shuttle body is at least partly filled with resilient inserts which seal this space off from the exterior.
  • the space between the two spring arms of the gripper is at least partly filled by a further resilient insert which seals that space relative to openings in the shuttle body.
  • the inserts must not interfere with motion and operation of the spring arms, and the sealing effect of the inserts should extend over the whole range of deflection of the :arms.
  • the inserts are formed, at least in part, of a resilient foam material, preferably a silicone-based plastic.
  • the inserts sealing the cavities in the shuttle body may contain recesses, or voids, or they may fill the cavities incompletely, but they must be such as to provide a dustproof closure for the openings as far as possible.
  • the vibration to which the arms are exposed can be substantially eliminated by choice of suitable materials. This is the case especially if the inserts are fastened, preferably by adhesive, to the spring arms and optionally to the inside wall of the shuttle body along the narrow edge thereof.
  • the inserts are fastened, preferably by adhesive, to the spring arms and optionally to the inside wall of the shuttle body along the narrow edge thereof.
  • At least one insert is made of a homogeneous, i.e. compact and tougher material.
  • a silicone rubber has proved a very efficient vibration-damping material on account of its resistance to aging, its insensitivity to chemical influences and to temperature changes, and its toughness.
  • FIG. 1 shows a longitudinal section through a shuttle embodying the invention, taken on the line I-I in FIG. 2;
  • FIG. 2 is a plan sectional view of the shuttle shown in FIG. 1, taken along the line IIII of FIG. 1;
  • FIG. 3 is a cross-section through the same shuttle along the line IIIIII in FIG. 2, illustrating operation of the plunger opener.
  • FIG. 4 is a fragmentary sectional view, similar to that of FIG. 2, through the end portion of another embodiment of the invention in which an insert contains recesses.
  • the gripper shuttle there shown has two spring arms 1 and a yoke 2 attached by rivets 3 to the head 4 of the tubular shuttle body 5.
  • the gripper jaws 6, carried by the arms 1, are inside the rear end 7 of the shuttle body 5.
  • the yarn feed (not shown) inserts the weft end 8, which is to be picked through the shed of the loom, between the two jaws 6 in a recess 9 in the shuttle body 5, the jaws 6 being open.
  • the jaws are opened by inserting a plunger opener 10 a conical or wedge-shaped pinthrough openings 11 in the shuttle body and between the arms 1 as indicated in FIG. 3.
  • That cavity is filled with soft, resilient inserts 12 which are cemented or otherwise fastened to the arms 1 and to the inside wall of the narrow side of the shuttle body.
  • inserts 12 are made of a resilient but dustproof material, preferably a siliconebased foam material, which can be inserted by injection moulding into the already assembled shuttle and which adheres firmly to the metal components.
  • the inserts may be made up in suitable shapes and then incorporated into the shuttle.
  • the resilience of the inserts 12 may be increased by providing voids or recesses 13 inside them (in the form of large pores in the foam) or on the outside of them, as shown in the embodiment of FIG. 4.
  • a further insert 14 may be added to the shuttle of the invention, filling at least part of the space between the two arms 1 and sealing it off from the opening 11,
  • This insert 14 is afiixed to the two arms by adhesive. Apart from its sealing effect, it serves to damp the vibrations caused in the arms by shocks from outside, and also, in the event of an arm fracturing, to hold the broken portion inside the shuttle body and so to prevent breakdown of the loom.
  • the invention has been hereinabove described in terms of a number of presently preferred embodiments, the invention itself is not limited thereto.
  • the shuttle body 5 may be made of steel, of another metal, or of a thermoplastic or thermo-setting plastic.
  • the inserts 12 which at least in part fill the space or clearance between the arms 1 and the inside of the body 5, and the insert 14 which at least in part fills the space between the arms 1, may be made of different materials and/or inserted or attached in different ways, to adapt them better to different stresses and requirements. More generally, the invention comprehends all modifications on and departures from the embodiments hereinabove described properly falling within the spirit and scope of the appended claims.
  • a gripper shuttle comprising a weft gripper having spaced arms, a housing surrounding the gripper with clear- :ance therefrom, and inserts of resilient material at least partly filling said clearance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
US710505A 1967-03-08 1968-03-05 Gripper shuttle Expired - Lifetime US3472286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH338267A CH472524A (de) 1967-03-08 1967-03-08 Greiferschützen mit Einlagen für Webmaschinen

Publications (1)

Publication Number Publication Date
US3472286A true US3472286A (en) 1969-10-14

Family

ID=4254742

Family Applications (1)

Application Number Title Priority Date Filing Date
US710505A Expired - Lifetime US3472286A (en) 1967-03-08 1968-03-05 Gripper shuttle

Country Status (7)

Country Link
US (1) US3472286A (de)
JP (1) JPS4922870B1 (de)
AT (1) AT269759B (de)
CH (1) CH472524A (de)
DE (1) DE1710445B1 (de)
FR (1) FR1553528A (de)
GB (1) GB1146819A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712345A (en) * 1970-05-29 1973-01-23 Sulzer Ag Yarn clamping mechanism
US3939878A (en) * 1973-10-23 1976-02-24 Sulzer Brothers Limited Gripper shuttle for weft yarns
JPS5522399U (de) * 1979-08-14 1980-02-13
US4491158A (en) * 1982-04-07 1985-01-01 Sulzer Brothers Limited Gripper clamp projectile
US5632309A (en) * 1995-02-01 1997-05-27 Sulzer Rueti Ag Gripper projectile for a weaving machine
CN110438631A (zh) * 2019-08-24 2019-11-12 台州宝诚科技服务有限公司 一种剑带方便更换的柔性剑秆织机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4966374U (de) * 1972-09-21 1974-06-10
JPS4979164U (de) * 1972-10-26 1974-07-09
JPS4980683U (de) * 1972-11-02 1974-07-12
CH633589A5 (de) * 1978-11-15 1982-12-15 Saurer Ag Adolph Fadenklemme.
FR2539768A1 (fr) * 1983-01-24 1984-07-27 Mat Textil Ste Alsa Const Systeme de protection, contre le duvet et la poussiere, du ressort des tetes d'aiguilles passe-trame dans un metier a tisser
DE68906663T2 (de) * 1988-12-16 1993-08-26 Werner Sollberger Greiferprojektil fuer webmaschinen.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599731A (en) * 1949-08-25 1952-06-10 Warner Swasey Co Shuttle cleaner
US2660201A (en) * 1951-01-08 1953-11-24 Warner Swasey Co Jaw holder for gripper shuttle looms
US2759496A (en) * 1953-04-10 1956-08-21 Sulzer Ag Gripper shuttle having a thread clamp
US3048197A (en) * 1958-08-27 1962-08-07 Fink Armin Shuttle with a bobbin clamping device
US3140731A (en) * 1962-04-17 1964-07-14 Wisconsin Wire Works Loom with a pirnless shuttle
US3237765A (en) * 1964-05-28 1966-03-01 Copper Range Co Copper ore concentration by induced radioactivity
US3348582A (en) * 1965-09-27 1967-10-24 Grover J Brookshire Weft yarn brake for sulzer loom

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE886730C (de) * 1951-01-08 1953-08-17 Sulzer Ag Fadenklammer fuer Webmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599731A (en) * 1949-08-25 1952-06-10 Warner Swasey Co Shuttle cleaner
US2660201A (en) * 1951-01-08 1953-11-24 Warner Swasey Co Jaw holder for gripper shuttle looms
US2759496A (en) * 1953-04-10 1956-08-21 Sulzer Ag Gripper shuttle having a thread clamp
US3048197A (en) * 1958-08-27 1962-08-07 Fink Armin Shuttle with a bobbin clamping device
US3140731A (en) * 1962-04-17 1964-07-14 Wisconsin Wire Works Loom with a pirnless shuttle
US3237765A (en) * 1964-05-28 1966-03-01 Copper Range Co Copper ore concentration by induced radioactivity
US3348582A (en) * 1965-09-27 1967-10-24 Grover J Brookshire Weft yarn brake for sulzer loom

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712345A (en) * 1970-05-29 1973-01-23 Sulzer Ag Yarn clamping mechanism
US3939878A (en) * 1973-10-23 1976-02-24 Sulzer Brothers Limited Gripper shuttle for weft yarns
JPS5522399U (de) * 1979-08-14 1980-02-13
US4491158A (en) * 1982-04-07 1985-01-01 Sulzer Brothers Limited Gripper clamp projectile
US5632309A (en) * 1995-02-01 1997-05-27 Sulzer Rueti Ag Gripper projectile for a weaving machine
CN110438631A (zh) * 2019-08-24 2019-11-12 台州宝诚科技服务有限公司 一种剑带方便更换的柔性剑秆织机
CN110438631B (zh) * 2019-08-24 2020-11-20 台州宝诚科技服务有限公司 一种剑带方便更换的柔性剑杆织机

Also Published As

Publication number Publication date
GB1146819A (en) 1969-03-26
FR1553528A (de) 1969-01-10
AT269759B (de) 1969-04-10
DE1710445B1 (de) 1971-10-07
CH472524A (de) 1969-05-15
JPS4922870B1 (de) 1974-06-12

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