EP0095137A2 - Dispositif de commande pour le mouvement des pinces d'introduction de la trame dans les métiers sans navette - Google Patents

Dispositif de commande pour le mouvement des pinces d'introduction de la trame dans les métiers sans navette Download PDF

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Publication number
EP0095137A2
EP0095137A2 EP83104900A EP83104900A EP0095137A2 EP 0095137 A2 EP0095137 A2 EP 0095137A2 EP 83104900 A EP83104900 A EP 83104900A EP 83104900 A EP83104900 A EP 83104900A EP 0095137 A2 EP0095137 A2 EP 0095137A2
Authority
EP
European Patent Office
Prior art keywords
arrangement
belt
straps
gearwheel
strap
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Withdrawn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
EP83104900A
Other languages
German (de)
English (en)
Other versions
EP0095137A3 (fr
Inventor
Nello Pezzoli
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.)
Vamatex SpA
Original Assignee
Vamatex SpA
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 Vamatex SpA filed Critical Vamatex SpA
Publication of EP0095137A2 publication Critical patent/EP0095137A2/fr
Publication of EP0095137A3 publication Critical patent/EP0095137A3/fr
Withdrawn legal-status Critical Current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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • This invention relates to important improvements in the means for controlling the reciprocating movement of the weft conveying grippers in shuttleless looms.
  • the present invention provides an improved arrangement for controlling the movement of the weft conveying grippers in shuttleless looms - of the type using a pair of gearwheels which perform short reciprocating rotations at the loom shed ends, and a pair of gripper advancement straps having longitudinally aligned central slots engaging with the teeth of said gearwheels - characterized in that it comprises, for each gearwheel and for each advancement strap, at least one narrow belt endlessly wound about guide pins, which cause a portion thereof to adhere against the lateral portions of the strap in order to press this latter into engagement with a wide arc of the gearwheel.
  • the arrangement preferably provides, for each gearwheel and strap, a single metal belt (i;hich could also be of plastic or composite material), comprising slots similar to those of the straps for engaging the teeth of the gearwheels, but it could alternatively provide a pair of parallel belts for each gearwheel, acting only on the sides of the straps.
  • a single metal belt i;hich could also be of plastic or composite material
  • the belt guide pins of the arrangement according to the invention may be fixed pins, onto which the belts wind and are apt to slide - being caused to rotate by the gearwheels - or pins provided with a rotating bush or bearing. Particularly in the first case, it will be appropriate to line the inner side of the metal belts with a suitable antifriction material.
  • the arrangement according to the invention comprises, on each side of a loom, a gearwheel 1 controlling a strap 2, to impart on said strap and on the gripper carried thereby the to-and-fro movements which govern the insertion of the weft yarn into the loom.
  • the strap 2 comprises at its centre a row of elongated rectangular slots 3, through which it engages with the peripheral teeth 4 - of corresponding or complementary shape - of the gearwheel 1, over a wide arc thereof.
  • the arc of the gearwheel 1, over which the strap 2 extends, is determined by the action of a belt 5, endlessly wound about guide pins 6, 7, 8 and 9, which are suitably positioned in respect of the gearwheel 1. It is a narrow metal belt, comprising at its centre a row of slots 5a, similar to the slots 3 of the strap 2 and also apt to engage with the teeth 4 of the gearwheel 1. A wide portion of the belt 5 is forced to wind around the periphery of the gearwheel 1, so as to in turn force the strap 2 against said periphery, over a correspondingly wide arc, and to move forward and backward therewith, driven by the teeth 4.
  • the pins about which the belt 5 winds may be fixed pins, as shown in figure 2 with reference to the pin 6, in which case the belt must easily be able to slide on the surface of such pins, with a minimum friction.
  • the inner surface of the belt will be lined with antifriction material.
  • the pins about which the belt winds may comprise an external bush or bearing 10, as shown in figure 3 with reference to the pin 6a, to ensure less friction. In this case, there will be no sliding action between the belt and the pin, when the belt is moving, and it will not be necessary to line the inner surface of the belt 5 with antifriction material.
  • the belt is usually of metal (for instance, formed from a steel strip, 0.2 to 0.3 mm thick); nonetheless, a laminated plastic belt or a composite belt (for instance, of metal lined with plastic material) could also be used.
  • the advantage of the arrangement comprising the belt lies in the fact of eliminating all relative sliding between the strap 2 and the means designed to press it against the gearwheel 1 and cause it to engage with the teeth 4 thereof (as opposed to previous arrangements, using guides or rollers). This reduces friction to a considerable extent and allows to avoid the antifriction linings always used in the past for the gripper straps, thereby evidently reducing and limiting the inertia of the moving masses and resulting into a considerable weight and cost saving.
  • the arrangement according to the invention provides a very precise guiding action, which is most apporopriate for obtaining the engagement of the straps over a wide arc of the gearwheels for the advancement thereof, with a limited tractive effort in the belt (as the bending moment required for curving the strap and cause it to adhere to the gearwheel is successively guaranteed by the two pins 6 and 9, arranged at the ends where the strap engages the gearwheel and where it leaves the same) and thus with absolute safety for a very long operating life of the mechanism.
  • the belt 5 illustrated in the accompanying drawings which is of the same width as the strap 2 and is provided with slots for engaging the teeth 4, could be replaced by a pair of narrow parallel shortly spaced belts, positioned at the sides of the teeth 4 and engaging the edges of the strap 2.
  • the belt 5 could also be provided with teeth or projections, apt to engage the already existing slots 3 of the strap 2, or other slots specifically provided therein (for instance, at the sides of the slots 3), thereby improving the solidarity between the belt 5 and the strap 2.
  • solutions of this type fall, as to what has been said, within the scope of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP83104900A 1982-05-25 1983-05-18 Dispositif de commande pour le mouvement des pinces d'introduction de la trame dans les métiers sans navette Withdrawn EP0095137A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2145782 1982-05-25
IT21457/82A IT1151228B (it) 1982-05-25 1982-05-25 Disposizione di comando del moto delle pinze di trasporto della trama in telai di tessitura senza navette

Publications (2)

Publication Number Publication Date
EP0095137A2 true EP0095137A2 (fr) 1983-11-30
EP0095137A3 EP0095137A3 (fr) 1984-02-22

Family

ID=11182064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104900A Withdrawn EP0095137A3 (fr) 1982-05-25 1983-05-18 Dispositif de commande pour le mouvement des pinces d'introduction de la trame dans les métiers sans navette

Country Status (10)

Country Link
EP (1) EP0095137A3 (fr)
JP (1) JPS5921746A (fr)
KR (1) KR840004546A (fr)
ES (1) ES522647A0 (fr)
GR (1) GR78487B (fr)
IL (1) IL68782A0 (fr)
IT (1) IT1151228B (fr)
PL (1) PL135839B1 (fr)
PT (1) PT76738B (fr)
RO (1) RO88367A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285001A2 (fr) * 1987-04-03 1988-10-05 Textilma AG Métier à tisser à griffes
EP0726341A2 (fr) * 1995-02-08 1996-08-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif d'insertion de la trame dans un métier à tisser à griffes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62114808A (ja) * 1985-11-12 1987-05-26 Dainichi Kiko Kk フロ−テイング式回転ツ−ル

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198215A (en) * 1963-06-12 1965-08-03 Draper Corp Tape motion for shuttleless looms
FR1443627A (fr) * 1965-07-30 1966-06-24 Métier à tisser avec organe d'insertion de trame à mouvement continu
CH567122A5 (fr) * 1974-03-11 1975-09-30 Rueti Ag Maschf
US3916957A (en) * 1973-08-13 1975-11-04 Raymond Dewas Tape drive in weaving machines
US4274449A (en) * 1978-05-31 1981-06-23 Ruti Machinery Works Ltd. Band guide for shuttleless looms

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198215A (en) * 1963-06-12 1965-08-03 Draper Corp Tape motion for shuttleless looms
FR1443627A (fr) * 1965-07-30 1966-06-24 Métier à tisser avec organe d'insertion de trame à mouvement continu
US3916957A (en) * 1973-08-13 1975-11-04 Raymond Dewas Tape drive in weaving machines
CH567122A5 (fr) * 1974-03-11 1975-09-30 Rueti Ag Maschf
US4274449A (en) * 1978-05-31 1981-06-23 Ruti Machinery Works Ltd. Band guide for shuttleless looms

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0285001A2 (fr) * 1987-04-03 1988-10-05 Textilma AG Métier à tisser à griffes
WO1988007600A1 (fr) * 1987-04-03 1988-10-06 Textilma Ag Metier a tisser a pince
US5097873A (en) * 1987-04-03 1992-03-24 Textilma Ag Gripper loom with a flexible fitting thread insertion band
EP0285001A3 (fr) * 1987-04-03 1992-04-29 Textilma AG Métier à tisser à griffes
EP0726341A2 (fr) * 1995-02-08 1996-08-14 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif d'insertion de la trame dans un métier à tisser à griffes
EP0726341A3 (fr) * 1995-02-08 1996-11-13 Toyoda Automatic Loom Works Dispositif d'insertion de la trame dans un métier à tisser à griffes
CN1045642C (zh) * 1995-02-08 1999-10-13 株式会社丰田自动织机制作所 剑杆织机中的纬纱插入设备

Also Published As

Publication number Publication date
RO88367A (fr) 1986-01-30
PT76738A (en) 1983-06-01
JPS5921746A (ja) 1984-02-03
ES8404431A1 (es) 1984-05-01
PL135839B1 (en) 1985-12-31
IL68782A0 (en) 1984-05-31
PT76738B (en) 1986-01-27
IT1151228B (it) 1986-12-17
GR78487B (fr) 1984-09-27
PL242189A1 (en) 1984-01-16
KR840004546A (ko) 1984-10-22
IT8221457A0 (it) 1982-05-25
EP0095137A3 (fr) 1984-02-22
ES522647A0 (es) 1984-05-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19851202

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Inventor name: PEZZOLI, NELLO