EP1377701A1 - Clamping device for seam weaving machines - Google Patents
Clamping device for seam weaving machinesInfo
- Publication number
- EP1377701A1 EP1377701A1 EP02730046A EP02730046A EP1377701A1 EP 1377701 A1 EP1377701 A1 EP 1377701A1 EP 02730046 A EP02730046 A EP 02730046A EP 02730046 A EP02730046 A EP 02730046A EP 1377701 A1 EP1377701 A1 EP 1377701A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- collet
- thread
- pneumatic cylinder
- clamping element
- cylinder
- 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
Links
- 238000009941 weaving Methods 0.000 title description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 239000004744 fabric Substances 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940069814 mi-omega Drugs 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
Definitions
- the invention relates to a collet for grasping a thread.
- the collet is arranged at the tip of a movable gripper arm of a pull-through gripper, which is used to insert the thread, a so-called auxiliary weft thread, into the seam weaving compartment in a seam weaving machine.
- a dewatering screen or forming fabric is used to dewater the paper web, which initially consists primarily of water components.
- the drainage screens consist of
- the drainage screens are then cut apart again and sewn into an endless screen cloth in a final process step using a woven seam.
- the woven seam is an extremely sensitive and time-consuming step in the manufacturing process of a drainage screen. In order to improve this time-consuming work process, weaving machines or automatic machines have been developed.
- warp threads of a length of, for example, 15 cm are exposed at the ends of the fabric to be connected by removing the weft threads in this area.
- the so-called woven seam in which the original weave is exactly restored, is then formed from the warp thread fringes and the weft threads removed from the fabric end.
- an auxiliary weaving shed or seam weaving shed is stretched out of the removed weft threads, in which the removed weft threads act as auxiliary warp threads.
- the warp thread fringes are inserted as auxiliary weft threads from the two fabric ends.
- a warp thread fringe is detached and held in place by a separator (DE-U-87 13 074, EP-A-0 301 174 and DE-U-90 02 278) from the large number of warp thread fringes projecting from each end of the fabric.
- a transfer rapier transports this warp thread fringe to a pull-through rapier, which then enters it as an auxiliary weft thread in the seam weaving compartment, in such a way that the auxiliary weft thread initially lies taut in the seam weaving compartment.
- the pull-through gripper is of the type mentioned at the beginning and is e.g. known from DE-U-81 22 449, EP-A-0 043 441 and EP-A-0 236 601. The pulling gripper no longer checks for the presence of the warp thread fringe.
- the auxiliary weft thread must be held with different tensions by the collet integrated in the pull-through hook.
- the auxiliary weft thread is tensioned with a corresponding pressure, generated by the pneumatic cylinder, between a flat tension surface on the collet body and a flat surface on the pressure piece which are parallel to one another.
- the invention has for its object to provide a collet that can be controlled so that it holds the thread securely on the one hand so that a high tensile force can be exerted on the thread and that on the other hand a very low clamping force can be metered reproducibly ,
- this object is achieved in that the first clamping element has two spaced cylindrical surfaces and in that the second clamping element has a cylindrical surface, the arrangement of the cylindrical surfaces being such that the axes of the cylindrical surfaces are parallel to one another and substantially perpendicular to the axis of the pneumatic cylinder and that in the extended state of the pneumatic cylinder, the cylinder surface of the second clamping element lies between the two cylinder surfaces of the first clamping element.
- An advantage of the collet according to the invention is that it is largely insensitive to contamination.
- the gripping force is only slightly influenced by adhering dirt.
- Figure 1 shows the collet in a spatial representation.
- Figure 2 shows the collet from above in the closed position.
- Figure 3 shows the collet in the position with reduced gas pressure in the pneumatic cylinder (power scale).
- Fig. 4 shows the collet in a spatial representation in a partially closed position, but without
- Fig. 5 the collet in section.
- the collet 10 is cylindrical overall and is composed of a clamping body 12 and a pneumatic cylinder 14, which are connected by means of an adapter ring 16.
- ⁇ ri cn ⁇ ⁇ • n to> 3 J Mi N P- S ⁇ cn PO to cn ON ri ö P 1 > NN -J i 2 ö c OJ P- P- p- P- 3 SD ⁇ s * 3 ⁇ P- P- rr 3 o 0 SD ⁇ P- ⁇ *> 3 ⁇ ⁇ 3 o ⁇ £ D ⁇
- the auxiliary warp threads Since the shed is formed from auxiliary warp threads, that is to say from threads which have been detached from the fabric to be made endless, the auxiliary warp threads also have a waveform permanently applied by the heat setting. For the stability and reliability of the woven seam, it is essential that the waveforms of the auxiliary weft threads and the auxiliary warp threads fit into one another in accordance with the weave repeat. This creates a positive connection that guarantees a very high strength of the woven seam. So that the wave troughs and peaks of the auxiliary weft threads and the auxiliary warp threads can fit into one another in accordance with the fabric repeat, a very high tension must be applied to the auxiliary weft threads after pulling them through the shed. This high tension is generated by the pulling gripper, for which purpose the auxiliary weft thread F must be clamped as tightly as possible in the collet 10.
- the auxiliary weft thread F After the auxiliary weft thread F has been drawn into the shed and a high tensile stress has built up in the auxiliary weft thread F, the auxiliary weft thread is rolled in by means of the sley. In order to ensure the interlocking interlocking of the troughs and peaks of the auxiliary weft thread between the auxiliary warp threads, the auxiliary weft thread is not cast over the entire width of the shed at the same time, but successively over the width of the shed starting from the end of the fabric to which it is attached as a warp fringe. This process is called "rolling in". For the positive interlocking of the waveform of the auxiliary weft threads and the auxiliary warp threads, the auxiliary weft thread must be able to shorten its length during the rolling in. Before rolling in, the pressure in the
- the pressure piece 22 with the further cylinder body 24 is slightly moved back by the thread F, which relaxes elastically in the direction of its diameter after the reduction of the gas pressure in the pneumatic cylinder 14, as can be seen in FIG. 3.
- the pressure piece 22 floats, ie it exerts a force neither in one direction nor in the other and is applied to the thread F without pressure.
- the auxiliary weft thread F is therefore held only by the wrap friction in the collet 10, while it is rolled in by the sley along the selvedge.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
- Treatment Of Fiber Materials (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Supports For Pipes And Cables (AREA)
- Processing Of Terminals (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20105091U | 2001-03-23 | ||
DE20105091U DE20105091U1 (en) | 2001-03-23 | 2001-03-23 | Collet for seam weaving machines |
PCT/EP2002/003234 WO2002077341A1 (en) | 2001-03-23 | 2002-03-22 | Clamping device for seam weaving machines |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1377701A1 true EP1377701A1 (en) | 2004-01-07 |
EP1377701B1 EP1377701B1 (en) | 2007-07-18 |
EP1377701B8 EP1377701B8 (en) | 2007-10-31 |
Family
ID=7954750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02730046A Expired - Lifetime EP1377701B8 (en) | 2001-03-23 | 2002-03-22 | Clamping device for seam weaving machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US6948531B2 (en) |
EP (1) | EP1377701B8 (en) |
AT (1) | ATE367465T1 (en) |
DE (2) | DE20105091U1 (en) |
WO (1) | WO2002077341A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1016052A3 (en) * | 2004-05-19 | 2006-02-07 | Wiele Michel Van De Nv | PNEUMATIC CONTROLLABLE WINDOW CLAMP FOR A WEAVING MACHINE. |
DE202005018856U1 (en) * | 2005-12-01 | 2007-04-12 | Wangner Gmbh & Co Kg | Holder for the weaving reed of a seam loom, to roll the seam weft thread either by means of oblique position of the reed or movable roller |
BE1018774A3 (en) | 2009-06-10 | 2011-08-02 | Picanol Nv | GRIP UNIT, CONTROL UNIT FOR A GRIP UNIT AND WEAVING MACHINE. |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT264407B (en) * | 1964-03-10 | 1968-08-26 | Elitex Zavody Textilniho | Loom with at least one gripper shuttle |
CH634614A5 (en) * | 1979-03-29 | 1983-02-15 | Textilma Ag | PROTECTIVE WEAVING MACHINE. |
DE3025909C2 (en) * | 1980-07-09 | 1983-07-14 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | Method and device for producing a woven seam between two fabric ends |
DE8122449U1 (en) * | 1981-07-30 | 1983-01-13 | Fa. F. Oberdorfer, 7920 Heidenheim | DEVICE FOR DISTRIBUTING THE WARP THREADS DURING SEAMING IN PAPER MAKING FABRICS |
EP0236601B2 (en) * | 1986-02-22 | 1996-09-04 | Asten Group Inc. | Automatic seaming machine for fabric belts |
DE8713074U1 (en) * | 1987-07-27 | 1988-11-24 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | Separator for separating threads held in a row |
DE9002278U1 (en) * | 1990-02-26 | 1991-07-25 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | Board for a separator for capturing and separating threads |
DE9211353U1 (en) * | 1992-08-24 | 1994-01-05 | Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen | Holder for the reed of a seam weaving machine |
DE9215498U1 (en) * | 1992-11-13 | 1994-03-17 | Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen | Pull-through gripper for inserting an auxiliary weft thread into the seam weaving compartment in a seam weaving machine |
DE9301722U1 (en) * | 1993-02-08 | 1994-06-09 | Novatech GmbH Siebe und Technologie für Papier, 72760 Reutlingen | Seam weaving machine with fringe catcher |
US5390708A (en) * | 1993-09-21 | 1995-02-21 | Asten Group, Inc. | Apparatus for translating yarns in the proper position and orientation for forming a woven join |
DE19505280C2 (en) * | 1995-02-16 | 1998-08-06 | Staeubli Gmbh | Method and device for the mechanical production of a seam for making a web of fabric endless |
AT403700B (en) * | 1996-11-22 | 1998-04-27 | Wis Engineering Gmbh | Gripper head for a thread, in particular for a seam weaving machine |
-
2001
- 2001-03-23 DE DE20105091U patent/DE20105091U1/en not_active Expired - Lifetime
-
2002
- 2002-03-22 EP EP02730046A patent/EP1377701B8/en not_active Expired - Lifetime
- 2002-03-22 DE DE50210506T patent/DE50210506D1/en not_active Expired - Lifetime
- 2002-03-22 WO PCT/EP2002/003234 patent/WO2002077341A1/en active IP Right Grant
- 2002-03-22 AT AT02730046T patent/ATE367465T1/en active
-
2003
- 2003-09-22 US US10/669,147 patent/US6948531B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02077341A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50210506D1 (en) | 2007-08-30 |
EP1377701B8 (en) | 2007-10-31 |
ATE367465T1 (en) | 2007-08-15 |
US6948531B2 (en) | 2005-09-27 |
WO2002077341A1 (en) | 2002-10-03 |
DE20105091U1 (en) | 2002-09-05 |
US20040154678A1 (en) | 2004-08-12 |
EP1377701B1 (en) | 2007-07-18 |
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