EP0412453A1 - Greiferband mit variabler Dicke für Greiferwebmaschinen - Google Patents

Greiferband mit variabler Dicke für Greiferwebmaschinen Download PDF

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Publication number
EP0412453A1
EP0412453A1 EP90114955A EP90114955A EP0412453A1 EP 0412453 A1 EP0412453 A1 EP 0412453A1 EP 90114955 A EP90114955 A EP 90114955A EP 90114955 A EP90114955 A EP 90114955A EP 0412453 A1 EP0412453 A1 EP 0412453A1
Authority
EP
European Patent Office
Prior art keywords
strap
gripper
section
area
thickness
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.)
Granted
Application number
EP90114955A
Other languages
English (en)
French (fr)
Other versions
EP0412453B1 (de
Inventor
Luigi Pezzoli
Giuseppe Casarotto
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.)
NUOVA VAMATEX S.P.A.
Original Assignee
NUOVA VAMATEX SpA
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 NUOVA VAMATEX SpA, Vamatex SpA filed Critical NUOVA VAMATEX SpA
Publication of EP0412453A1 publication Critical patent/EP0412453A1/de
Application granted granted Critical
Publication of EP0412453B1 publication Critical patent/EP0412453B1/de
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
    • D03D47/27—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
    • 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

  • the present invention concerns improvements in gripper straps for gripper looms, that is, in the straps which control the motion of the grippers and thus of the weft yarns through the shed of modern looms.
  • the EP-81-102588 has already supplied a solution to the problem of varying the stiffness of gripper straps along their length: this solu­tion consists in incorporating into a conventional strap of normal stiff­ness a core or lining of variable thickness and/or width along the strap length.
  • the straps used for this system are in fact particularly rigid because of their rib­bed section with great overall thickness (required to form said recess and allow proper engagement with said guides and precise guiding of the gripper at the centre of the shed). Similar situations can besides arise also with other types and arrangements of gripper straps.
  • the strap is of the type moved by a toothed wheel with reciprocating motion, the teeth of which engage into notches formed along said strap, the distance between said notches in the strap according to the invention can be varied according to the position taken up therein by the neutral bending axis.
  • the gripper strap according to the invention is of the type having longitudinal stiffening ribs, and its thickness will advantageously be reduced only in correspondence of said longitudinal ribs, as far as causing the end of the strap opposite to that carrying the gripper to take up a flat rectangular shape.
  • the decrease in thickness of the strap can be continuous and uniform or, alternatively, discontinuous by steps, along the length of the strap. It can furthermore be uniform, or not uniform, across the width of the strap, giving rise to symmetrical or asymmetrical sections, according to cases.
  • the gripper strap accor­ding to the invention has the following cross section: a channel or C section whose flanges forming said ribs have a constant thickness in the area of the strap end carrying the gripper; a channel or C section whose flanges forming said ribs have a gradually decreasing thickness in an area adjacent to the previous one and extending therefrom; and a rectan­gular or T section in the area of the strap end opposite to that carrying the gripper.
  • the gripper strap N carrying the gripper P through the warp shed of the loom T, has to be particularly flexible in correspondence of its part caused to adhere - by conventional guide means P1 and P2 - to the wheel R controlling its motion, the teeth of which engage into its notches.
  • this is obtained - in the case of particularly rigid straps - by gradually reducing the thickness of the strap over at least part of its section, starting from an area 2 close to the end 3 carrying the gripper and extending towards the opposite end 4.
  • the strap N according to the invention is of the type with channel section, having lateral longitudinal stiffening ribs 1, for the gripper to be pro­perly guided at the centre of the shed.
  • the configuration of the strap N shown in figs. 2 to 5 is such that only the ribs 1 are gradually and evenly reduced in thickness, so as to be totally eliminated in correspondence of its end 4, while the remai­ning part of the strap N keeps its thickness unvaried.
  • Said strap end 4 thus takes up a perfectly rectangular and relatively thin symmetrical section (fig. 5), which is fully apt to guarantee a high flexibility of the strap in this area. In the adjacent areas the flexibility will be similar, while the strap will then gradually stiffen towards its end 3 carrying the gripper, taking up its maximum thickness between said end 3 and the area 2 from which the ribs 1 start to grow thinner.
  • a gripper strap similar to that shown in figs. 2 to 5, is illu­strated in figs. 6 to 10: the only difference in respect of the previous embodiment is that the thickness of this strap varies discontinuously, by steps, along its full length.
  • a first length 5 of maximum uniform thickness in correspondence of the end area carrying the gripper (its cross section is shown in fig. 8), is followed - between points 6 and 7 - by a length 8 of reduced thickness of the ribs 1 (cross section shown in fig. 9) and then - beyond point 7 - by a final length 9 wherein the ribs 1 are eliminated and the strap takes up a thin rectangular section (fig. 10).
  • 1 the strap always keeps a symmetrical cross section.
  • the ribs 1 of the strap are again gradually and evenly reduced in thickness, but said re­duction is more pronounced - in respect of the strap embodiment of figs. 2 to 5 - whereby the strap end 10, opposite to the end 3 carrying the gripper, takes up a T section, as shown in fig. 14.
  • the cross section is perfectly symmetrical. It could however be provided for the strap - having a ribbed or non-ribbed section - to be unevenly reduced in thickness across its width, in which case, the cross section of the strap would be asymmetrical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Belt Conveyors (AREA)
  • Knitting Machines (AREA)
  • Clamps And Clips (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manipulator (AREA)
EP90114955A 1989-08-09 1990-08-03 Greiferband mit variabler Dicke für Greiferwebmaschinen Expired - Lifetime EP0412453B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2148289 1989-08-09
IT8921482A IT1230810B (it) 1989-08-09 1989-08-09 Nastro portapinza a spessore variabile per telai di tessitura a pinze.

Publications (2)

Publication Number Publication Date
EP0412453A1 true EP0412453A1 (de) 1991-02-13
EP0412453B1 EP0412453B1 (de) 1994-05-18

Family

ID=11182488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114955A Expired - Lifetime EP0412453B1 (de) 1989-08-09 1990-08-03 Greiferband mit variabler Dicke für Greiferwebmaschinen

Country Status (12)

Country Link
EP (1) EP0412453B1 (de)
JP (1) JP2937434B2 (de)
KR (1) KR970008885B1 (de)
CN (1) CN1023331C (de)
AT (1) ATE105879T1 (de)
BR (1) BR9003888A (de)
CZ (1) CZ281780B6 (de)
DE (1) DE69008968T2 (de)
DK (1) DK0412453T3 (de)
ES (1) ES2056318T3 (de)
IT (1) IT1230810B (de)
SK (1) SK279146B6 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1022754B1 (nl) * 2015-02-26 2016-08-30 Picanol Nv Geleidingsinrichting voor een lans voor een grijperweefmachine
WO2018028899A1 (en) 2016-08-11 2018-02-15 Picanol Gripper band and gripper unit for a gripper weaving machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09176934A (ja) * 1995-12-27 1997-07-08 Toyota Autom Loom Works Ltd レピア織機に用いるスプロケットホイール及びレピアバンド並びにレピア織機における緯入れ装置
GB2587297B (en) 2015-03-31 2021-08-04 Fisher & Paykel Healthcare Ltd A user interface and system for supplying gases to an airway
WO2018029638A1 (en) 2016-08-11 2018-02-15 Fisher & Paykel Healthcare Limited A collapsible conduit, patient interface and headgear connector

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL89639C (de) *
FR1397230A (fr) * 1964-01-17 1965-04-30 Perfectionnements aux machines à tisser à alimentation continue en trame
DE2030433A1 (en) * 1970-06-20 1971-12-30 Fa. Hermann Wangner, 7410 Reutlingen Weft lance - with bowed steel spring stiffners
DE2902729B1 (de) * 1979-01-25 1980-02-21 Dornier Gmbh Lindauer Schussfadeneintragorgan fuer schuetzenlose Webmaschinen
EP0102588A2 (de) * 1982-09-03 1984-03-14 Vilminore Officine Meccaniche S.P.A. Antriebsband mit variabler Steife für Greiferwebmaschinen
FR2582322A3 (fr) * 1985-05-22 1986-11-28 Lamiflex Srl Structure de lance pour metier a tisser sans navette.
EP0275479A1 (de) * 1986-12-23 1988-07-27 VAMATEX S.p.A. Mittel zum Führen der Greiferbewegung im Fach von Webmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL89639C (de) *
FR1397230A (fr) * 1964-01-17 1965-04-30 Perfectionnements aux machines à tisser à alimentation continue en trame
DE2030433A1 (en) * 1970-06-20 1971-12-30 Fa. Hermann Wangner, 7410 Reutlingen Weft lance - with bowed steel spring stiffners
DE2902729B1 (de) * 1979-01-25 1980-02-21 Dornier Gmbh Lindauer Schussfadeneintragorgan fuer schuetzenlose Webmaschinen
EP0102588A2 (de) * 1982-09-03 1984-03-14 Vilminore Officine Meccaniche S.P.A. Antriebsband mit variabler Steife für Greiferwebmaschinen
FR2582322A3 (fr) * 1985-05-22 1986-11-28 Lamiflex Srl Structure de lance pour metier a tisser sans navette.
EP0275479A1 (de) * 1986-12-23 1988-07-27 VAMATEX S.p.A. Mittel zum Führen der Greiferbewegung im Fach von Webmaschinen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1022754B1 (nl) * 2015-02-26 2016-08-30 Picanol Nv Geleidingsinrichting voor een lans voor een grijperweefmachine
WO2016134973A1 (en) * 2015-02-26 2016-09-01 Picanol Guide device for a rapier in a gripper weaving machine
WO2018028899A1 (en) 2016-08-11 2018-02-15 Picanol Gripper band and gripper unit for a gripper weaving machine
BE1024494B1 (nl) * 2016-08-11 2018-03-12 Picanol Naamloze Vennootschap Grijperband en grijpereenheid voor een grijperweefmachine
CN109563658A (zh) * 2016-08-11 2019-04-02 必佳乐公司 用于片梭织机的片梭带和片梭单元
EP3497273B1 (de) 2016-08-11 2022-04-06 Picanol Greiferband und greifereinheit für eine greiferwebmaschine

Also Published As

Publication number Publication date
IT8921482A0 (it) 1989-08-09
JP2937434B2 (ja) 1999-08-23
DE69008968D1 (de) 1994-06-23
DE69008968T2 (de) 1994-09-15
DK0412453T3 (da) 1994-10-03
CS9003934A2 (en) 1991-12-17
SK279146B6 (sk) 1998-07-08
KR970008885B1 (en) 1997-05-30
KR910004867A (ko) 1991-03-29
ATE105879T1 (de) 1994-06-15
CZ281780B6 (cs) 1997-01-15
CN1023331C (zh) 1993-12-29
ES2056318T3 (es) 1994-10-01
CN1049878A (zh) 1991-03-13
BR9003888A (pt) 1991-09-03
IT1230810B (it) 1991-10-29
JPH03137247A (ja) 1991-06-11
EP0412453B1 (de) 1994-05-18

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