EP1672104A2 - Dispositif à griffes pour métier à tisser du type Axminster - Google Patents

Dispositif à griffes pour métier à tisser du type Axminster Download PDF

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Publication number
EP1672104A2
EP1672104A2 EP05026365A EP05026365A EP1672104A2 EP 1672104 A2 EP1672104 A2 EP 1672104A2 EP 05026365 A EP05026365 A EP 05026365A EP 05026365 A EP05026365 A EP 05026365A EP 1672104 A2 EP1672104 A2 EP 1672104A2
Authority
EP
European Patent Office
Prior art keywords
bearing
gripper device
jaws
clamping jaws
extension
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
EP05026365A
Other languages
German (de)
English (en)
Other versions
EP1672104A3 (fr
EP1672104B1 (fr
Inventor
Stefan Danner
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.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
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 Groz Beckert KG filed Critical Groz Beckert KG
Priority to PL05026365T priority Critical patent/PL1672104T3/pl
Publication of EP1672104A2 publication Critical patent/EP1672104A2/fr
Publication of EP1672104A3 publication Critical patent/EP1672104A3/fr
Application granted granted Critical
Publication of EP1672104B1 publication Critical patent/EP1672104B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/02—Axminster looms, i.e. wherein pile tufts are inserted during weaving
    • D03D39/08—Gripper Axminster looms

Definitions

  • Axminster weaving machines were considered to be less productive for a long time. However, with the introduction of electronically controlled jacquard technology, Axminster weaving machines have not only gained a high degree of flexibility, but have also greatly increased their productivity.
  • the gripper devices of the Axminster weaving machines are of particular importance. They are usually controlled by a so-called lock. It must be ensured that the individual grippers have a controlled and desired clamping effect. If the clamping effect is not sufficient, individual pile threads may slip or get lost, which of course is unacceptable.
  • the grippers are usually formed by two jaws, which are mounted together like a pair of pliers.
  • the grippers are designed to be extremely narrow in order to fit between the small intermediate spaces between the warp threads.
  • the jaws are held together by a rivet, which forms a joint for the jaws.
  • Such genes have a certain radial play. This has a direct influence on the clamping action of the gripper.
  • Axminster looms several grippers are driven by one and the same actuator. Different clamping effects due to radial clearance of different grippers then causes individual grippers the thread well while others do not grasp the thread because the jaws do not close sufficiently. This problem is then often solved in that the actuator is adjusted so that even the biggest game having gripper completely close.
  • this has the consequence that in the course of the manufacturing process in grippers working initially without play, due to the strong closing pressure setting game or in extreme cases, the grippers tend to break.
  • the gripper device according to the invention has an improved joint.
  • This has a cylindrical bearing portion on which one of the clamping jaws is pivotally mounted with a likewise cylindrical abutment portion.
  • the two cylindrical surfaces serving for storage can be both continuous annular surfaces and discontinuous surfaces, wherein recesses provided in the surfaces, for example the oil retention or the dirt receptacle, can serve.
  • the gripping device according to the invention Compared with gripping devices with, for example, conical bearing bores which are held together by a countersunk rivet, the gripping device according to the invention, provided with a cylindrical bearing device, has a more precise radial Guide the two jaws.
  • the reduced radial clearance leads to a uniform closing of all gripper devices that are actuated by the same cam curve. Accordingly, the gripper devices can close precisely.
  • the overload of individual gripper devices can be avoided, so that the risk of jaw breakage is reduced to a minimum or completely excluded.
  • the clamping effect of the individual grippers is almost identical.
  • the looms can be optimally adjusted.
  • the cylindrical bearing surface is formed on one of the clamping legs and the counter-bearing surface on the respective other clamping leg.
  • the extension belongs to the joint an extension which is arranged concentrically to the pivot axis of the joint and engages through a bearing opening of the jaws.
  • the extension is formed on the like also referred to as "base” jaws, while the bearing opening is arranged in the called “levers” jaws.
  • the extension has a cylindrical outer surface, which serves as the cylindrical bearing surface in a first embodiment.
  • the likewise cylindrical abutment surface can be formed by the wall of the bearing opening.
  • the extension can be deformed in the axial and / or radial direction. Its upper free edge then forms a rubble edge. This ring can be closed annularly around the circumference or can only be urged outwards in sections in the form of individual caulking sections.
  • the extension is preferably integral with one of the jaws, i. seamlessly made of the same material as this one.
  • it may be connected to the jaw, for example, by a welding operation or another connection process. In any case, it is with respect to the jaws, with which it is firmly connected, arranged precisely and play-free connected to this, whereby the basis for a precise storage of the other jaw is created.
  • a bearing rib is arranged concentrically to the extension. This can then be formed as an annular, formed on an otherwise flat surface survey, which is associated with an arranged in the other jaws annular groove.
  • the bearing rib can serve for the axial and / or radial mounting of the jaws together. Serves them the axial bearing their height is at least slightly greater than the depth of the annular groove.
  • the flat annular surface of the annular rib serves as an axial bearing and bearing surface, while remaining a gap between the jaws.
  • a precise axial bearing is given at the same time low friction and good oil retention.
  • the bearing rib can serve for radial mounting.
  • the cylindrical bearing surface is formed by the inner or outer cylindrical flank of the bearing rib.
  • the corresponding abutment surface is then formed by the associated annular groove wall of the bearing or annular groove.
  • the bearing device is formed largely independently of the extension. If this caulked or compressed, to secure the two jaws captive to each other, the radial and / or axial bearing is retained by the principle not to be deformed bearing rib and the associated annular groove.
  • the gripper according to the invention is also distinguished in a preferred embodiment by the fact that the cylindrical bearing surface has an axial length to the hinge axis of at least one fifth to one quarter of the total thickness of the jaw. This corresponds to half the height of the projection, which may be formed on one of the jaws and serves to support the jaws together. While one half of the height of the projection of the storage serves, the other half is provided with a flared, conical edge. The inclination of the conical surface to the cylindrical surface is up to 45 °. A separate rivet is not available. Rather, the jaws are connected by embossing. Manufacturing tolerances and tolerances due to wear during operation do not affect due to the presence of the cylindrical bearing surface in the radial direction.
  • FIG. 1 illustrates an Axminster weaving machine 1 used to make a pile fabric such as a carpet. It has a plurality of not illustrated warp beams, of which a plurality of warp threads 2, 3, 4 are introduced. With the warp threads 2, 3, 4 subjects are formed, in which a (usually double) weft thread 5 is registered ( Figure 2). To shed serve heald shafts 6, 7, 8, the strands for guiding the warp threads 2, 3, 4 have.
  • the thread carrier 12 may have a plurality of threads 13, 14 of different colors and may be controlled so as to pick up the desired thread (e.g., with a pattern-dependent selected color).
  • a knife carrier 15 has one or more knives for cutting a piece of a desired length from the pile yarn, the end of which holds the gripper means 11.
  • the gripper device 11 is held on a bar 16, which carries a large number of other, equally trained gripper devices. These are arranged in Figure 1 perpendicular to the plane congruent to each other.
  • a control shaft 17 is provided for opening and closing the gripper device 11. The bar 16 and the control shaft 17 are pivotable together so that the gripper devices 11 are moved back and forth between the positions A and B.
  • To the Axminster weaving machine 1 also includes a stop bar with corresponding blades 18, as can be seen for example from Figure 2.
  • the gripper device illustrated separately in FIG. 3 has two clamping jaws 19, 21.
  • the to be connected to the Barre 16 jaws 19 is often referred to as a base.
  • the pivotally mounted on the jaws 19 jaws 21 is often referred to as a lever.
  • the jaws 19, 21 are flat sheet metal parts with a thickness of one or a few millimeters. They have perpendicular to the plane in Figure 3 a matching thickness. Their flanks lie substantially at equal levels, i. the jaws 19, 21 are arranged without lateral offset to each other.
  • the jaw 19 is formed as an approximately right angle.
  • a substantially constant thickness D (illustrated in Fig. 6) wedge-shaped.
  • D illustrated in Fig. 6
  • gripper surface 25 On its side facing the clamping jaw 21, it can be provided with a gripper surface 25.
  • the gripper surface 25 may be upset, soldered or welded. Preferably, it is profiled.
  • the jaws 21 is also formed angular. At its the control shaft 17 associated end, it is provided with a coupling profile 26 which may be formed, for example, as an approximately rectangular cutout.
  • the control shaft 17 engages with a corresponding projection in the coupling profile 26 to move the respective end of the jaw 21 to the bar 16 or away.
  • the other end 28 of the jaw 21 in turn runs out wedge-shaped and is provided with a profiled, upset, welded or otherwise formed gripper surface 29.
  • a hinge 32 For articulated mounting of the jaws 19, 21 to each other is a hinge 32. It defines a transverse to the jaws 19, 21 and thus in Figure 3 perpendicular to the plane standing pivot axis 33 fixed.
  • Both clamping jaws 19, 21 each have an annular flattened section 34, 35 in the region of the joint 32. While a short tube-like extension 36, which can be seen in particular from FIGS. 5, 6, is formed on the section 34, the section 35 is provided with a bearing opening 37.
  • the extension 36 preferably merges integrally into the material of the clamping jaw 19, ie it is connected without joints. Its outer peripheral surface may form a narrow cylindrical bearing surface 38.
  • the extension 36 is preferably only about so long that its preferably flat, annular end face lies in a common plane with the flat, in Fig. 6 upper flat side 20 of the jaw 19 or below it.
  • serving as a tubular rivet extension 36 does not protrude beyond the corresponding flat side 20 in the preferred embodiment.
  • the length or width of the bearing surface 38 preferably at least a fifth to a quarter of the total thickness D.
  • the wall of the bearing opening 37 may then form a corresponding likewise cylindrical abutment surface 39.
  • Both bearing surfaces 38, 39 are arranged parallel to the pivot axis 33 in the embodiment shown. But they can also be arranged at an angle (not shown) to the pivot axis 33.
  • the extension 36 may be slightly compressed at its upper edge, or be deformed radially outwardly.
  • the radially outwardly deformed edge region 41 thus forms an annular, the clamping jaws 19 at the edge of its bearing opening 37 cross and thus positively locking portion and in this sense a rivet.
  • the rivet connection is therefore at the same time attachment and joint, with a precise radial bearing is achieved by the mating of the cylindrical bearing surface 38 and the abutment surface 39.
  • the bearing opening 37 may be countersunk cone-shaped.
  • the gripping device 11 described so far shows a significantly improved behavior compared to conventional gripper devices as a result of the more precise storage by the joint 32. Due to the reduced radial clearance and bearing surfaces 38, 39 with a high cylindrical support component precision is ensured not only in the delivery condition but also over long periods of use.
  • a radial bearing 42 is additionally or alternatively provided to the radial bearing by the extension 36, which is formed by a formed on one of the jaws 19, 21, preferably annular bearing rib 43 and an associated annular groove 44.
  • the bearing rib 43 and the annular groove 44 are arranged concentrically to the pivot axis 33.
  • the bearing rib 43 protrudes from a plane surface 45, which is formed on the portion 34. Accordingly, the annular groove 44 is introduced into a plane surface 46, which is formed on the portion 35 ( Figure 4).
  • the bearing rib 43 may be provided with recesses or interruptions.
  • the bearing rib 43 may be provided with a cylindrical bearing surface 47, 48 both on its inside and on its outside.
  • Corresponding abutment surfaces 49, 51 may be formed by the cylindrical groove flanks of the annular groove 44.
  • the radial tolerancing of the bearing surfaces 47, 48 and the abutment surface 49, 51 narrower and the existing game is smaller than the clearance between the extension 36 and the bearing opening 37.
  • the radial bearing is completely independent of the deformation of the edge 41 of the bearing rib 43 and the annular groove 44 set.
  • the radial bearing 42 is used as a lubrication point.
  • a gap is preferably present between the groove bottom 53 and the end face 52 even when the plane surface 46 rests on the plane surface 45. The remaining gap serves as a lubricant reservoir.
  • the bearing rib, the axial bearing of the two jaws 19, 21 take on each other.
  • the flat end face 52 of the bearing rib 43 and the flat groove bottom 53 of the annular groove 44 are in contact with each other.
  • a certain amount of play then remains between the plane surfaces 45, 46. This is accomplished by adjusting the height of the bearing rib 43, i. the distance of the end face 52 from the flat surface 45 is greater than the depth of the annular groove 44, which can be seen as a distance between the flat surface 46 and the groove bottom 53.
  • the gripper 11 is characterized in that the storage, ie the connection point between its clamping jaws 19, 21 has a cylindrical supporting portion.
  • This support component preferably makes up at least one fifth to one quarter of the total thickness D of the clamping jaw.
  • a separate rivet is not available. Rather, the jaws 19, 21 are connected together by embossing. Manufacturing tolerances and tolerances due to wear during operation do not affect in the radial direction due to the cylindrical supporting portion of the bearing. This has the advantage that the clamping action of individual grippers is almost identical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Clamps And Clips (AREA)
EP05026365A 2004-12-16 2005-12-02 Dispositif à griffes pour métier à tisser du type Axminster Not-in-force EP1672104B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05026365T PL1672104T3 (pl) 2004-12-16 2005-12-02 Urządzenie chwytakowe dla maszyny tkackiej Axminster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004061166A DE102004061166B4 (de) 2004-12-16 2004-12-16 Greifeinrichtung für eine Axminster-Webmaschine

Publications (3)

Publication Number Publication Date
EP1672104A2 true EP1672104A2 (fr) 2006-06-21
EP1672104A3 EP1672104A3 (fr) 2008-09-24
EP1672104B1 EP1672104B1 (fr) 2010-04-28

Family

ID=36127364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05026365A Not-in-force EP1672104B1 (fr) 2004-12-16 2005-12-02 Dispositif à griffes pour métier à tisser du type Axminster

Country Status (8)

Country Link
EP (1) EP1672104B1 (fr)
CN (1) CN1827876B (fr)
AT (1) ATE466123T1 (fr)
DE (2) DE102004061166B4 (fr)
DK (1) DK1672104T3 (fr)
ES (1) ES2343527T3 (fr)
PL (1) PL1672104T3 (fr)
PT (1) PT1672104E (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1696059A2 (fr) * 2005-02-24 2006-08-30 Griffith Textile Machines Limited Pince
EP2107145A1 (fr) * 2008-04-01 2009-10-07 Groz-Beckert KG Poignée pour métier à tisser Axminster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107287737B (zh) * 2016-04-13 2024-04-23 范德威尔（中国）纺织机械有限公司 用于片梭织机的夹纱器以及制造这种夹纱器的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635670A (en) 1926-02-27 1927-07-12 Shawmut Eng Co Nipper for tuft weaving
US1816938A (en) 1930-01-23 1931-08-04 Worcester Loom Works Gripper for tuft weaving looms
GB441938A (en) 1934-08-03 1936-01-30 John Edward Robinson Improvements in tuft yarn grippers for pile fabric looms
GB876780A (en) 1959-07-05 1961-09-06 Ingenious Mechanical Products Yarn grippers for pile fabric manufacture
DE2164222A1 (de) 1971-12-23 1973-06-28 Brintons Ltd Garngreifer zum einsetzen von buescheln oder tuffs bei der teppichherstellung und verfahren zu deren herstellung
GB2060280A (en) 1979-10-06 1981-04-29 Dunlop Ltd Preventing incorrect connection of complementary electrical components

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1060280A (en) * 1964-10-09 1967-03-01 Frederick Greenwood & Sons Ltd Yarn grippers for axminster and similar looms
GB1344979A (en) * 1970-02-24 1974-01-23 Appleby Edmonds Ltd Yarn grippers
GB1353153A (en) * 1970-05-26 1974-05-15 Brintons Ltd Yarn grippers for carpet looms

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635670A (en) 1926-02-27 1927-07-12 Shawmut Eng Co Nipper for tuft weaving
US1816938A (en) 1930-01-23 1931-08-04 Worcester Loom Works Gripper for tuft weaving looms
GB441938A (en) 1934-08-03 1936-01-30 John Edward Robinson Improvements in tuft yarn grippers for pile fabric looms
GB876780A (en) 1959-07-05 1961-09-06 Ingenious Mechanical Products Yarn grippers for pile fabric manufacture
DE2164222A1 (de) 1971-12-23 1973-06-28 Brintons Ltd Garngreifer zum einsetzen von buescheln oder tuffs bei der teppichherstellung und verfahren zu deren herstellung
GB2060280A (en) 1979-10-06 1981-04-29 Dunlop Ltd Preventing incorrect connection of complementary electrical components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GEOFFREY H. CRAWSHAW: "Carpet Manufacture", WRONZ DEVELOPMENTS, PRIVATE BAG, pages 4749

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1696059A2 (fr) * 2005-02-24 2006-08-30 Griffith Textile Machines Limited Pince
EP1696059A3 (fr) * 2005-02-24 2008-12-17 Griffith Textile Machines Limited Pince
EP2107145A1 (fr) * 2008-04-01 2009-10-07 Groz-Beckert KG Poignée pour métier à tisser Axminster

Also Published As

Publication number Publication date
DE102004061166B4 (de) 2006-11-16
ES2343527T3 (es) 2010-08-03
PL1672104T3 (pl) 2010-09-30
CN1827876B (zh) 2011-02-09
DE502005009481D1 (de) 2010-06-10
DE102004061166A1 (de) 2006-07-13
ATE466123T1 (de) 2010-05-15
EP1672104A3 (fr) 2008-09-24
EP1672104B1 (fr) 2010-04-28
PT1672104E (pt) 2010-07-12
CN1827876A (zh) 2006-09-06
DK1672104T3 (da) 2010-08-23

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