EP1467009A2 - Kompakter Greifer für Webmaschinen - Google Patents

Kompakter Greifer für Webmaschinen Download PDF

Info

Publication number
EP1467009A2
EP1467009A2 EP04100198A EP04100198A EP1467009A2 EP 1467009 A2 EP1467009 A2 EP 1467009A2 EP 04100198 A EP04100198 A EP 04100198A EP 04100198 A EP04100198 A EP 04100198A EP 1467009 A2 EP1467009 A2 EP 1467009A2
Authority
EP
European Patent Office
Prior art keywords
gripper
gripping strip
shelf
metal strip
gripping
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
EP04100198A
Other languages
English (en)
French (fr)
Other versions
EP1467009B1 (de
EP1467009A3 (de
Inventor
Roberto Lebbolo
Silvano Testa
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.)
Promatech SpA
Original Assignee
Promatech 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 Promatech SpA filed Critical Promatech SpA
Publication of EP1467009A2 publication Critical patent/EP1467009A2/de
Publication of EP1467009A3 publication Critical patent/EP1467009A3/de
Application granted granted Critical
Publication of EP1467009B1 publication Critical patent/EP1467009B1/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
    • D03D47/12—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
    • D03D47/233—Carrying grippers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • D03J5/06—Dummy shuttles; Gripper shuttles

Definitions

  • the present invention relates to a carrying or drawing gripper for a weaving loom, specifically a gripper with a flexible gripping system.
  • Weaving grippers have various design and operating modes. One of these, which will be referred to in the following description, is so designed that grasping of the weft yarn is performed by a flexible metal strip which is suitably pushed against an abutting surface of a plate integral with the gripper body.
  • FIG. 1 represents an elevation side view of a prior art gripper marketed under the brand SOMET and the identification code BDL311F.
  • the gripper comprises a main body 1, intended to be secured to a gripper-mounting strap (not shown), onto which a flexible gripping metal strip 3 is mounted through the fastening means 2, capable of engaging with a plate 4, integral with the gripper body 1.
  • the weft yarn is intended to be grasped (not shown).
  • a further elastic element 5 is provided, which is elbow-shaped and secured at one end to the body 1 by the fastening means 2, and resting flexibly onto the metal strip 3 at the other end.
  • the flexible metal strip 3 is provided with a stiffening metal band 6.
  • control lever L is connected, cantilever projecting backward and ending with a control member L1 equipped with a suitably shaped cam surface, so as to co-operate with a loom engaging system (not shown).
  • the pressure that can be exerted by the elastic element 5 onto the flexible metal strip 3 can be adjusted by means of an adjusting block 7 that can be shifted longitudinally along the gripper body 1 to deform the element 5 to a higher or lower degree, and thus determine a higher or lower elastic load onto the metal strip 3.
  • This type of gripper has some drawbacks.
  • the metal strip 3 and the elastic element 5 are linked to the gripper body 1, through the fastening means 2, in a rather backward position (compared to the gripper feed direction A).
  • the theoretical fulcrum point of the metal strip 3, coinciding with the point of constraint is extremely recessed in relation to the engaging area with the plate 4, resulting in the fact that opening of the gripper would not occur promptly and to the desired degree.
  • a bearing island 8 is provided, located between the working position of the metal strip 3 on the plate 4 and fastening/connecting means 2, near to but backward of the connecting position of the control lever L.
  • a force applied in direction F to the end L1 of lever L can be broken up - shifting it at the bearing island 8 - into a shear force onto metal strip 3, which tends to maintain the same adherent to island 8, and a torque that tends to rotate (by bending) metal strip 3 around rear edge 8a of island 8, producing the desired amount of deformation.
  • fig. 1 represents, as already mentioned, a partially-interrupted elevation side view of a prior art gripper
  • fig. 2 is an elevation side view of a gripper according to the invention.
  • fig. 3 is a plan top view of the gripper depicted in fig. 2.
  • a gripper comprises, in a manner known per se, a main body 101, intended to be mounted over a gripper-mounting strap (not shown), onto which a flexible metal strip 103 is attached through fastening means 102, which is capable of grasping a weft yarn (not shown), together with a plate 104 attached to the gripper body 101.
  • an elastic, elbow-shaped pressure metal strip 105 is further provided, itself attached by an end to the gripper body 101 through the fastening means 102.
  • a shimming 106 is preferably provided, intended to transfer the action of the former onto the latter and to determine static deformation of the pressure metal strip 105 in terms of its distance from the gripping metal strip 103: a sort of leaf spring is therefore created which increases the pressure exerted by the gripping system onto the weft yarn.
  • a control lever V is provided, secured at one end to a point P connecting it to the metal strip 103, near the shelf 110, and then cantilever projecting backwards, underneath the shelf, ending with a control member V 1 .
  • the curved design of the lever V allows to let the main part of the lever pass below the shelf 110, despite positioning the control member V 1 above it, so that it may properly engage with the gripper-opening mechanism integral with the weaving loom.
  • the functioning of the gripper according to the invention is similar to that known in the field.
  • the elastic metal strip 105 in fact keeps constantly under pressure the gripping metal strip 103 resting on the fixed plate 104, so as to securely grasp the weft yarn.
  • the control member V 1 of the lever V touches a suitable engaging element (not shown) which pushes it towards F. This push translates - in the connecting position P - into a modest shear strain onto the metal strip 103 and a torque (obtained as a multiplication of the push times the arm of lever V) which tends to bend the metal strip 103 upwards, thus opening the engagement with the fixed plate 104 and releasing the weft yarn retained between them.
  • the fulcrum point of the metal strip 103 - essentially coinciding with the point of constraint on the shelf 110 (for example the front fastening screw 111) - is sufficiently forward in relation to its position of co-operation with the fixed plate 104: hence further devices or arrangements are not necessary to differently determine the fulcrum point, which serves to avoid the frictions and functioning inefficiencies present in the prior art, thus achieving another desired object.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
  • Advancing Webs (AREA)
  • Treatment Of Fiber Materials (AREA)
EP04100198A 2003-04-10 2004-01-22 Kompakter Greifer für Webmaschinen Expired - Lifetime EP1467009B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000176U ITMI20030176U1 (it) 2003-04-10 2003-04-10 Pinza compatta a funzionamento perfezionato per telai tessili
ITMI20030176U 2003-04-10

Publications (3)

Publication Number Publication Date
EP1467009A2 true EP1467009A2 (de) 2004-10-13
EP1467009A3 EP1467009A3 (de) 2005-02-02
EP1467009B1 EP1467009B1 (de) 2008-02-27

Family

ID=32866061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04100198A Expired - Lifetime EP1467009B1 (de) 2003-04-10 2004-01-22 Kompakter Greifer für Webmaschinen

Country Status (8)

Country Link
EP (1) EP1467009B1 (de)
KR (1) KR20040089504A (de)
CN (1) CN1570237A (de)
AT (1) ATE387525T1 (de)
DE (1) DE602004012017T2 (de)
ES (1) ES2302534T3 (de)
IT (1) ITMI20030176U1 (de)
TW (1) TW200510590A (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005014107A1 (de) * 2005-03-22 2006-09-28 Picanol N.V. Nehmergreifer mit einem hakenförmigen Einsatz und Verfahren zum Herstellen des hakenförmigen Einsatzes
BE1018774A3 (nl) * 2009-06-10 2011-08-02 Picanol Nv Grijpereenheid, controlesysteem voor een grijpereenheid en weefmachine.
DE102009037127A1 (de) * 2009-08-11 2011-02-17 Lindauer Dornier Gmbh Greiferkopf einer Webmaschine
ITMI20111710A1 (it) * 2011-09-22 2013-03-23 Promatech Spa Coppia di pinze, portante e traente, perfezionate per telaio tessile.
CN111350012B (zh) * 2020-04-24 2021-04-16 扬州市郭氏精密机械制造有限公司 一种片梭纱夹的加力装置和加力方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061194B1 (de) * 1970-12-11 1972-03-09 Roscher Gmbh Webmaschinenfabri Nehmergreifer mit Haken und Klemmzunge fuer Webmaschinen mit Entnahme des Schussfadens von ortsfesten Spulen
EP0457718B1 (de) * 1990-05-16 1994-07-06 Sulzer RàœTi Ag Greiferklemme für Webmaschinen
BE1012459A6 (nl) * 1999-02-03 2000-11-07 Picanol Nv Draadklem voor een grijper van een grijperweefmachine.
ES2328665T3 (es) * 2001-05-08 2009-11-17 Promatech S.P.A. Pinza portadora de trama para telares de tejeduria ajustable respecto del grosor del hilo de trama.

Also Published As

Publication number Publication date
KR20040089504A (ko) 2004-10-21
DE602004012017D1 (de) 2008-04-10
ITMI20030176U1 (it) 2004-10-11
CN1570237A (zh) 2005-01-26
ES2302534T3 (es) 2008-07-16
ATE387525T1 (de) 2008-03-15
TW200510590A (en) 2005-03-16
EP1467009B1 (de) 2008-02-27
EP1467009A3 (de) 2005-02-02
DE602004012017T2 (de) 2008-05-29

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