US20050115627A1 - Mechanical loom comprising a warp beam - Google Patents
Mechanical loom comprising a warp beam Download PDFInfo
- Publication number
- US20050115627A1 US20050115627A1 US10/502,467 US50246705A US2005115627A1 US 20050115627 A1 US20050115627 A1 US 20050115627A1 US 50246705 A US50246705 A US 50246705A US 2005115627 A1 US2005115627 A1 US 2005115627A1
- Authority
- US
- United States
- Prior art keywords
- thread
- warp
- mechanical loom
- roller
- deflecting roller
- 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.)
- Abandoned
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/12—Controlling warp tension by means other than let-off mechanisms
- D03D49/14—Compensating for tension differences during shedding
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/06—Warp let-off mechanisms
- D03D49/10—Driving the warp beam to let the warp off
Definitions
- the invention relates to a mechanical loom comprising a warp beam, the said mechanical loom moving a warp thread or a warp thread group with a drawing action, the warp thread being drawn from a thread store.
- the deflecting roller to be equipped with a force measurement bearing which delivers a signal corresponding to the measured force.
- a force measurement bearing which delivers a signal corresponding to the measured force.
- two force measurement bearings are provided, in which the deflecting roller is mounted.
- a control unit is provided, which processes the signal delivered by the deflecting roller or the force measurement bearing and converts it into control pulses for the warp beam drive. It also proves advantageous that a desired thread tension can be set at the control unit, so that a continuous drive of the warp beam is ensured.
- the warp thread guidance in the region of the deflecting roller is further improved in that the deflecting roller is preceded and/or followed by a guide roller on the draw-in side and/or the draw-off side.
- a length compensation device is provided downstream of the deflecting roller.
- the length compensation device is a jockey device which equalizes a thread tension coming, where appropriate, from the mechanical loom.
- the length compensation device is a spring compensation roller.
- FIG. 1 shows an outline illustration of a rear stand of a mechanical loom with a warp beam drive and with a deflecting roller formed as a measuring roller;
- FIG. 2 shows an illustration corresponding to FIG. 1 , but with a length compensation device downstream of the measuring roller;
- FIG. 3 shows an illustration corresponding to FIG. 2 , but relating to a third embodiment.
- a rear stand of a mechanical loom, not illustrated in any more detail, with a warp beam 1 and with a drive 2 for the warp beam 1 is first illustrated and described with reference to FIG. 1 .
- the warp thread 3 or a warp thread group driven positively by means of the warp beam drive 2 is guided via a deflecting roller 4 formed as a measuring roller.
- the deflecting roller 4 is respectively preceded and followed by a guide roller 5 both on the draw-in side and on the draw-off side.
- the deflecting roller 4 formed as a measuring roller is equipped with a force measurement bearing.
- This force measurement bearing determines the load acting on the deflecting roller 4 due to the warp thread 3 , from which a signal S is generated.
- This signal S is processed in a control unit 6 and is converted into a control pulse I for the warp beam drive 2 .
- the warp beam drive 2 is influenced in dependence on this.
- the drive at the warp beam 1 is reduced as soon as the load acting on the deflecting roller 4 is determined as being too low.
- the warp beam drive 2 is accelerated.
- the desired thread tension can be set at the control unit 6 , the latter acting correspondingly on the warp beam drive 2 .
- the deflecting roller 4 is followed downstream by a length compensation device 7 , the latter being formed in the manner of a jockey device 8 . This equalizes any thread tension coming from the mechanical loom.
- FIG. 3 shows an alternative embodiment of the length compensation device 7 .
- a spring compensation roller 9 is used, which is provided instead of the guide roller following the deflecting roller 4 , but at the same time also assumes the task of this guide roller.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
A mechanical loom comprising a warp beam (1) for pulling a warp thread (3) or a set of warp threads. The warp thread (3) is pulled out of a thread storage element. This enables homogenizing the warp thread tension. To this end, the warp thread (3) is guided, after the thread storage element, by means of a deflection roll (4) which is embodied as a measuring roll, the measuring roll detecting the prevailing thread tension and influencing the warp beam drive (2) according to the thread tension.
Description
- The invention relates to a mechanical loom comprising a warp beam, the said mechanical loom moving a warp thread or a warp thread group with a drawing action, the warp thread being drawn from a thread store.
- Mechanical looms are known from the prior art, in which the warp thread or the warp thread group is positively driven predominantly via a rocker. The thread tension is set by means of a spring force. As soon as this force is overcome by the thread tension, a limit switch is triggered, which activates a geared motor and drives the warp beam positively until the limit switch has returned to its basic position again. In this known embodiment, the spring force which is not uniform proves to be a disadvantage, the result of this being that the warp thread tension is uneven, which, in turn, has an adverse influence on the quality of the woven or knitted fabric to be produced.
- In light of the prior art described above, a technical problem for the invention is seen in constructing a mechanical loom of the type in question in an improved manner, particularly with regard to evening of the warp thread tension.
- This problem is solved initially and substantially by means of the subject matter of
claim 1, there being provision for guiding the warp thread, downstream of the thread store, via a deflecting roller formed as a measuring roller, the said measuring roller detecting the thread tension prevailing there and influencing the warp beam drive in dependence on this. As a result of this configuration according to the invention, the warp beam is driven evenly, with the result that a uniform warp thread tension is achieved at the same time. The deflecting roller formed as a measuring roller detects the thread tension prevailing there and transmits a corresponding pulse to a control element, the latter controlling the drive at the warp beam. A uniform warp thread tension is in this case ensured by means of a sensitive electronic control. Thus, the drive of the warp beam is reduced as soon as the load acting on the measuring roller is determined as being too low. With an increased load, the warp beam drive is accelerated correspondingly. In an advantageous development of the subject matter of the invention, there is provision for the deflecting roller to be equipped with a force measurement bearing which delivers a signal corresponding to the measured force. Preferably, in this case, two force measurement bearings are provided, in which the deflecting roller is mounted. Advantageously, a control unit is provided, which processes the signal delivered by the deflecting roller or the force measurement bearing and converts it into control pulses for the warp beam drive. It also proves advantageous that a desired thread tension can be set at the control unit, so that a continuous drive of the warp beam is ensured. The warp thread guidance in the region of the deflecting roller is further improved in that the deflecting roller is preceded and/or followed by a guide roller on the draw-in side and/or the draw-off side. In order to achieve adaptation to the height of the shed exit of the mechanical loom and of the warp thread length from the warp beam to the mechanical loom, it is further proposed that a length compensation device is provided downstream of the deflecting roller. In this respect, it is preferred that the length compensation device is a jockey device which equalizes a thread tension coming, where appropriate, from the mechanical loom. Alternatively, there is also the possibility that the length compensation device is a spring compensation roller. - The invention is explained in more detail below with reference to the accompanying drawing which illustrates only three exemplary embodiments and in which:
-
FIG. 1 shows an outline illustration of a rear stand of a mechanical loom with a warp beam drive and with a deflecting roller formed as a measuring roller; -
FIG. 2 shows an illustration corresponding toFIG. 1 , but with a length compensation device downstream of the measuring roller; -
FIG. 3 shows an illustration corresponding toFIG. 2 , but relating to a third embodiment. - A rear stand of a mechanical loom, not illustrated in any more detail, with a
warp beam 1 and with adrive 2 for thewarp beam 1 is first illustrated and described with reference toFIG. 1 . - The
warp thread 3 or a warp thread group driven positively by means of thewarp beam drive 2 is guided via a deflectingroller 4 formed as a measuring roller. The deflectingroller 4 is respectively preceded and followed by aguide roller 5 both on the draw-in side and on the draw-off side. - The deflecting
roller 4 formed as a measuring roller is equipped with a force measurement bearing. This force measurement bearing, not illustrated in any more detail, determines the load acting on thedeflecting roller 4 due to thewarp thread 3, from which a signal S is generated. This signal S is processed in acontrol unit 6 and is converted into a control pulse I for thewarp beam drive 2. - As a result of this configuration, via the measuring roller or deflecting roller, the thread tension prevailing there is detected, whereupon the
warp beam drive 2 is influenced in dependence on this. Thus, the drive at thewarp beam 1 is reduced as soon as the load acting on the deflectingroller 4 is determined as being too low. Correspondingly, if an increased load is determined, thewarp beam drive 2 is accelerated. - By virtue of the configuration according to the invention, an even feed of thread tension to the mechanical loom is achieved.
- Furthermore, the desired thread tension can be set at the
control unit 6, the latter acting correspondingly on thewarp beam drive 2. - As illustrated in
FIG. 2 , in dependence on the shed exit height of the mechanical loom and of the warp thread length from thewarp beam 1 to the mechanical loom, the deflectingroller 4 is followed downstream by alength compensation device 7, the latter being formed in the manner of ajockey device 8. This equalizes any thread tension coming from the mechanical loom. -
FIG. 3 shows an alternative embodiment of thelength compensation device 7. Here, inter alia in order to equalize a thread tension coming from the mechanical loom, a spring compensation roller 9 is used, which is provided instead of the guide roller following thedeflecting roller 4, but at the same time also assumes the task of this guide roller. - All features disclosed are (inherently) pertinent to the invention. The disclosure of the application hereby also incorporates in full the disclosure content of the associated/appended priority documents (copy of the prior application), also for the purpose of incorporating features of these documents into claims of the present application.
Claims (9)
1-8. (canceled)
9. Mechanical loom comprising a warp beam (1) for moving a warp thread (3) or a warp thread group with a drawing action, the warp thread (3) being drawn from a thread store, the loom further comprising a deflecting roller (4) wherein the warp thread (3) is guided, downstream of the thread store, via the deflecting roller (4), which is formed as a measuring roller, the measuring roller detecting thread tension and directing the warp beam drive (2) in dependence of the thread tension.
10. Mechanical loom according to claim 9 wherein the deflecting roller (4) is equipped with a force measurement bearing which delivers a signal (S) corresponding to the measured force.
11. Mechanical loom according to claim 10 , further comprising a control unit (6), which processes the signal (S) delivered by the deflecting roller (4) or the force measurement bearing and converts it into control pulses (I) for the warp beam drive (2).
12. Mechanical loom according to claim 11 , wherein a desired thread tension can be set at the control unit (6).
13. Mechanical loom according to claim 9 , wherein the deflecting roller (4) is preceded and/or followed by a guide roller (5) on a draw-in side and/or a draw-off side.
14. Mechanical loom according to claim 9 , futher comprising a length compensation device (7) located downstream of the deflecting roller (4).
15. Mechanical loom according to claim 14 , whrein the length compensation device (7) comprises a jockey device (8).
16. Mechanical loom according to claim 14 , wherein the length compensation device (7) comprises a spring compensation roller (9).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10203068.5 | 2002-01-26 | ||
DE10203068A DE10203068A1 (en) | 2002-01-26 | 2002-01-26 | Loom with a warp beam |
PCT/EP2003/000118 WO2003062512A1 (en) | 2002-01-26 | 2003-01-09 | Mechanical loom comprising a warp beam |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050115627A1 true US20050115627A1 (en) | 2005-06-02 |
Family
ID=7713154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/502,467 Abandoned US20050115627A1 (en) | 2002-01-26 | 2003-01-09 | Mechanical loom comprising a warp beam |
Country Status (6)
Country | Link |
---|---|
US (1) | US20050115627A1 (en) |
EP (1) | EP1483437A1 (en) |
CN (1) | CN1639399A (en) |
DE (1) | DE10203068A1 (en) |
TW (1) | TW200302303A (en) |
WO (1) | WO2003062512A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220316103A1 (en) * | 2019-06-20 | 2022-10-06 | Vandewiele Nv | Shed-forming device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20120340A1 (en) * | 2012-03-06 | 2013-09-07 | Btsr Int Spa | DEVICE AND METHOD OF FEEDING WIRES OF ORDER TO A FRAME |
CN107723904B (en) * | 2017-11-14 | 2023-06-06 | 无锡市鼎麒新材料科技有限公司 | Warp tension mechanism of stretching thin cloth loom and method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4504022A (en) * | 1982-05-05 | 1985-03-12 | Stang Hans Peter | Thread feed mechanism and method for textile machines |
US5276627A (en) * | 1989-06-21 | 1994-01-04 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Method of setting weaving conditions for a jet loom |
US5857496A (en) * | 1996-04-19 | 1999-01-12 | Switched Reluctance Drives Limited | Weaving apparatus including switched reluctance drive |
US6109307A (en) * | 1998-05-11 | 2000-08-29 | Mageba Textilmaschinen Gmbh & Co. | Thread clamping device figuring weft threads on jacquard machines |
US6216747B1 (en) * | 1999-03-15 | 2001-04-17 | E. I. Du Pont De Nemours And Company | Beam let-off apparatus and a method for letting off filaments |
-
2002
- 2002-01-26 DE DE10203068A patent/DE10203068A1/en not_active Withdrawn
-
2003
- 2003-01-07 TW TW092100264A patent/TW200302303A/en unknown
- 2003-01-09 WO PCT/EP2003/000118 patent/WO2003062512A1/en not_active Application Discontinuation
- 2003-01-09 EP EP03702403A patent/EP1483437A1/en not_active Withdrawn
- 2003-01-09 CN CN03805356.XA patent/CN1639399A/en active Pending
- 2003-01-09 US US10/502,467 patent/US20050115627A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4504022A (en) * | 1982-05-05 | 1985-03-12 | Stang Hans Peter | Thread feed mechanism and method for textile machines |
US5276627A (en) * | 1989-06-21 | 1994-01-04 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Method of setting weaving conditions for a jet loom |
US5857496A (en) * | 1996-04-19 | 1999-01-12 | Switched Reluctance Drives Limited | Weaving apparatus including switched reluctance drive |
US6109307A (en) * | 1998-05-11 | 2000-08-29 | Mageba Textilmaschinen Gmbh & Co. | Thread clamping device figuring weft threads on jacquard machines |
US6216747B1 (en) * | 1999-03-15 | 2001-04-17 | E. I. Du Pont De Nemours And Company | Beam let-off apparatus and a method for letting off filaments |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220316103A1 (en) * | 2019-06-20 | 2022-10-06 | Vandewiele Nv | Shed-forming device |
Also Published As
Publication number | Publication date |
---|---|
WO2003062512A1 (en) | 2003-07-31 |
CN1639399A (en) | 2005-07-13 |
DE10203068A1 (en) | 2003-08-07 |
EP1483437A1 (en) | 2004-12-08 |
TW200302303A (en) | 2003-08-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |