WO2002092892A1 - Fachbildeeinrichtung mit federdämpfung - Google Patents
Fachbildeeinrichtung mit federdämpfung Download PDFInfo
- Publication number
- WO2002092892A1 WO2002092892A1 PCT/DE2002/000958 DE0200958W WO02092892A1 WO 2002092892 A1 WO2002092892 A1 WO 2002092892A1 DE 0200958 W DE0200958 W DE 0200958W WO 02092892 A1 WO02092892 A1 WO 02092892A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core element
- spring
- shed forming
- shedding
- forming device
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/24—Features common to jacquards of different types
- D03C3/44—Lingoes
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/24—Features common to jacquards of different types
- D03C3/42—Arrangements of lifting-cords
Definitions
- the strands are inevitably moved in one direction, while they are pulled in the other direction by a spring.
- the wire is moved by the spring to form the lower compartment.
- the spring is fixed at the other end in the weaving machine or anchored to the floor and keeps the harness cord and the heald under tension in every operating state.
- the arrangement of spring, heald and harness cord shows signs of resonance, including the propagation of waves that pass through the linear system.
- the natural resonances of the system play no role as long as the speed of movement of the heald is low compared to the resonance frequency. But at the moment where the speed of movement of the flashes reaches the range of the resonance frequency, unpleasant waves occur in the spring.
- the waves are excited in the spring by the movement of the heald and travel towards the fixed end, where they are reflected and back towards the heald. Under unfavorable circumstances, it can even happen that the heald becomes tension-free because the returning shaft in the connection between the spring and the heald has a phase position that is opposite to the movement initiated by the movement of the harness cord.
- the lower spring attachment point consists of a molded plastic part on which a threaded pin is formed.
- the coil spring is screwed onto the threaded pin.
- the threaded pin carries at its free end two resiliently movable legs that protrude into the interior of the spring and press against the spring. The two legs are in turn connected to each other at the end remote from the threaded pin and merge into two further legs which form an open fork.
- the heald is held taut between the harness cord and the coil spring.
- the end of the coil spring lying away from the heald is anchored in place.
- a damping element is present, which is in contact with the coil spring at least at several spaced-apart locations and forces the originally straight coil spring to have a non-straight course.
- the coil spring is in contact with the damping element at points spaced apart from one another.
- the contact force of the coil spring on the damping element is determined by the inherent elasticity of the spring and the degree of deflection. The elasticity of the on the other hand, it plays practically no role.
- the damping element does not need to have any elasticity compared to the resilience of the coil spring. It can be rigid with respect to the force exerted by the coil spring in such a way that it is not pressed into another shape by the coil spring. In this way it is possible to apply very precisely reproducible contact forces and thus very precisely reproducible frictional forces between the spring and the damper. generating element.
- the degree of deformation ie. the wavelength and / or the amplitude which the damping element of the coil spring imposes changes over the length of the damping element. For example, increasing damping or coupling of the vibrations can be achieved in this way.
- the damping element is initially deformed relatively little in the direction of the heald from the straight course and the deformation increases in the direction of the anchoring end of the helical spring. With very low dispersion, very good damping is achieved on the damping element.
- the damping element is preferably a core element which is arranged in the coil spring and is linear. In this way, additional space for the damping element is saved because it is arranged at the location that is inevitably present anyway.
- the core element can have a non-straight course that deviates from the straight course.
- Another possibility is to use a core element which is straight in itself and which carries discretely spaced apart wart-like projections or bumps with which the helical spring is forced to have the desired non-straight course.
- the diameter in the area of the protrusion or hump is smaller than the inside width of the screw the,
- this essentially represents a cylindrical structure, which has an undulating course.
- the waves expediently define a regression line, so that on average the spring runs in a straight line.
- the wave-shaped course can arise in that the core element forms a screw or in that the core element forms waves that lie in a common plane.
- a projection of the core element onto a plane produces a wavy band, the width of which corresponds to the diameter of the core element and the undulating nature of which essentially corresponds to the undulating or helical profile of the core element.
- the dimensions of the undulating course are expediently defined on this band which is created by projection in the plane.
- the wavy course shows a wave depth in the projection, measured at an edge of the band, which lies between a wave apex and a wave trough between 0.1 and 3 mm.
- the strength of this shaft stroke depends on how the diameter ratio between the core element and the inside width of the coil spring is dimensioned and on how strongly the coil spring is to be deflected or pressed against the core element.
- the distances between the crest of the wave and the trough can be between 2 and 20 mm.
- projections or bumps are used, these can be arranged along a helical line, or in the simplest case zigzag, ie in each case two adjacent projections are located on opposite sides of the core element.
- the distance between the projections is advantageously in the range between 5 mm and 30 mm, preferably between 5 mm and 20 mm.
- the projections or bumps are expediently in one piece with the core element and can either be molded on or molded on if the core element is produced in this form in the master molding process. Another possibility is to produce the bumps by local deformation, for example by squeezing ears. The last option is available if the core element consists of a permanently deformable material, for example metal.
- the length of the core element is expediently dimensioned such that at least one full shaft with the above dimensions can be generated.
- the core element can lie loosely in the helical spring or be firmly connected to the lower anchoring means.
- Thermoplastic materials such as polyamide, polyethylene and polyurethane or other materials such as metal, ceramic, thermosets or vulcanizable materials are suitable as the material for the core element.
- the shedding device according to the invention is preferably used in jacquard weaving machines. Because of the very good damping effect and the small space requirement, however, the arrangement according to the invention is not based on Jac- quard machines limited, but can also be used in normal weaving machines for the production of unpatterned weaving materials or dobby machines.
- the subject-forming device is accordingly, also for example a dobby, a jacquard machine or a comparable drive device, in order to set the strands in motion.
- the heald at the relevant end of the heald shaft can be provided with a plastic molded part which, for example, has a thread that can be screwed into the helical spring.
- connection of the helical spring to the lower or the upper anchoring member can take place in accordance with the prior art.
- FIG. 1 is a schematic representation of a shedding device according to the invention
- Fig. 3 shows the upper connection between the strand shaft and the return spring
- Fig. 4 shows another embodiment of the core element with lateral projections or bumps, in an enlarged view.
- FIG. 5 shows the core element according to FIG. 4 cut in a cross section at the height of a projection
- FIG. 6 shows a core element according to the invention, in which the projections are produced by local reshaping, in an enlarged representation
- Fig. 7 shows the core element of FIG. 6 in a cross section at the height of a projection.
- the subject-forming device includes a drive device 1, of which a roller train 2 is illustrated.
- a roller cord attached to a base 3 extends from the roller train 2 and merges into a harness cord 4 which passes between a glass grate or a guide base 5.
- the harness cord 4 continues to a choir board 6 and exits through a bore 7 down there.
- a heald 8 is attached at the lower end, ie at that end of the harness cord 4, which lies away from the roller train 2, .
- the heald 8 has an eyelet or an eye 9 for a warp thread 11.
- An upper and a lower heald frame 12, 13 extend from the eyelet 9 and lie on a common straight line.
- the lower end of the lower heald shaft is connected to a return spring 14. bound at 15 anchored to the machine frame or to the floor.
- the movement of the roller train 2 is transmitted to the heald 8 via the harness cord 4.
- the harness cord 4 is pulled up and the eye 9 is pulled up from the neutral position to form the upper compartment.
- the return spring 14 is tensioned more than in the neutral position of the heald 8, which corresponds to the closed shed.
- the return spring 14 pulls the heald 8 down to the same extent as the harness cord 4 moves down.
- the relevant warp thread 11 forms the lower compartment.
- the upward movement of the heald 8 is an inevitable movement which is rigidly forced over the longitudinally inextensible harness cord 4.
- the opposite direction is a movement caused by the return spring 14 and, in this respect, is inevitable or rigid only to a limited extent.
- the structure of harness cord 4, heald 8, warp thread 11 and return spring 14 represents a spring-mass system that has one or more resonance frequencies.
- the frequency with which the heald 8 is brought from the neutral position with the shed closed into the position for the upper shed or into the position for the lower shed is approximately 10 Hz.
- These frequencies are from the drive system 1 are imposed are in the order of magnitude of the resonance frequencies of the overall system or the resonance frequency of subsystems.
- harmonics arise and it can at these frequencies, waves form on the linear structure between the choir board 6 ' and the anchoring point 15 in the retraction spring 14, which are reflected at the anchoring point 15 without corresponding countermeasures and become standing waves in the retraction spring 14.
- the return spring 14 is extremely heavily loaded at certain points and tends to break.
- the lower anchoring point of the return spring 14 according to FIG. 2 is formed.
- An anchoring element 16 which is essentially rod-shaped, belongs to the connection of the return spring 14, which is shown in sections in FIG. 2.
- the anchoring element 16 has at its lower end an eyelet 17 which is to be suspended in a corresponding rail which is fixedly attached to the machine frame.
- An essentially cylindrical shaft 18 extends from the eyelet 17 and is provided with a collar 19 at its upper end.
- An external thread pin 21 runs concentrically to the shaft 18 above the collar 19.
- the external thread pin has a length which corresponds to approximately 10 spring turns.
- the return spring 14 is screwed onto this threaded pin 21.
- the return spring 14 is a cylindrical spring wound from a cylindrical steel wire, in which the windings generally lie on one another in the relaxed state.
- the threaded pin 21 merges into a core element 22 which, as shown, has a non-straight course.
- the core element 22 forms valleys 23 and apex 24. It is deformed in such a way that the area defined by the valleys and apex represents a plane. This means that in a side view rotated by 90 °, compared to Fig. 2, the core member 22 is straight.
- the wave trough 23 on the opposite side of the core element 22 leads to a wave crest which deforms the spring 14 in the corresponding opposite direction, like the crest 24.
- the core element 22 has a circular cross section at all points, the diameter of the cross section being approximately 5-30% smaller than the inside diameter of the helical spring 14.
- the diameter of the core element 22 can be constant over its length or can decrease towards the tip.
- the core element 22 is injection-molded in one piece from plastic together with the threaded pin 21, the shaft 18 and the eyelet 17. Suitable plastics are polyamide, polyethylene, polyurethane, polyester.
- the undulating course, which the core element 22 describes, is so strong that the troughs and crests 23, 24 of the helical spring 14 impose a corresponding course.
- the coil spring 14 no longer runs straight in the region of the core element, but with a zigzag movement which corresponds to the core element 22, as is indicated by the dashed lines 25 and 26.
- the deflection of the spring 14 in the lateral direction is mitigated in accordance with the difference in diameter between the outer diameter of the core element 22 and the inside width of the helical spring 14.
- the shape of the representation of the core element 22 in FIG. 2 corresponds to a projection of the core element 22 onto a plane, specifically that projection in which this is achieved by the Projection created a meandering band with the greatest amplitude. If one considers each of the boundary lines thus obtained as the course of a vibration and uses the terminology customary for vibrations to describe it, the amplitude of the vibration measured between tip and tip is approximately 0.1 to 3 mm, preferably 0.1 to 1 mm, during the Wavelength of the oscillation is approximately between 4 and 40 mm; both values can change along the core element 22.
- the amplitude of the wavy line i.e. increase the amount of lateral deflection starting from the free end of the core element 22 up to the threaded pin 21. It is hereby achieved that the spring 14 rests with its windings on the first shaft apex with a small lateral force because it is less deformed than on a shaft apex which is closer to the threaded pin 21.
- a molded plastic body 27 is molded onto the free end of the stranded shaft 13, and its structure corresponds to the opposite end of the anchoring element 16.
- the molded plastic body forms a collar 28 and a threaded pin 29 which extends coaxially with the stranded shaft 13.
- the threaded pin 29 carries an external thread, which can be cylindrical or conical and onto which, as described above, the return spring 14 is screwed until the end, as shown, abuts the collar 28.
- the operation of the core element 22 as an attenuator in the spring 14 is approximately as follows:
- the push runs as a wave in the direction of the anchoring element 16.
- the push runs here as a longitudinal wave over the tensioned return spring 14. In normal operation, this ensures that the Spring turns of the return spring 14 do not lie on one another in any operating situation. Due to the shock wave, however, such a collision can definitely happen.
- the shock wave runs through the mutually spaced turns of the spring, which now correspondingly reach the core element 22. Friction occurs between the respective moving spring windings and the respective shaft apex 23, 24 of the core element. Friction converts the kinetic energy of the spring coils into heat and thus withdraws energy from the system. Amplitude increases due to resonances are effectively suppressed.
- the damping ensures that a shock wave running in the direction of the threaded pin 21 only reaches the end of the helical spring 14 fixed on the threaded pin 21 in a weakened manner and causes a correspondingly reduced echo in amplitude, which in turn is further weakened during the return along the core element ,
- the core element 22 thus effectively suppresses standing waves on the return spring 14.
- the damping effect by the core element 22, the total length of which is between 5% and 40%, preferably between see 10% and 30% of the operationally tensioned return spring 14 is also ensures that longer-frequency waves are effectively damped to suppress the formation of standing waves, the wavelength of which is in the order of the tensioned spring.
- the core element 22 in one piece to the threaded pin 21.
- the core element can be provided at any point to produce its damping effect.
- FIG. 4 shows another exemplary embodiment of a core element 22, which serves to force the helical spring 14 to have a non-straight course, at the same time only a selective contact between the core element 22 and the helical spring 14 to produce the damping effect described above.
- the core element 22 consists of a straight shaft 31, the diameter of which is significantly smaller than the clear width of the cylindrical interior inside the coil spring 14.
- the cusps or extensions 32 are offset from one another by 90 °, ie, as shown in the cross section of FIG. 5, a four-pointed star is formed in the projection.
- the largest diameter is nevertheless in the area of each bump 32 smaller than the diameter of the interior of the helical spring 14.
- the helical spring 14 becomes from its natural, exactly straight shape in forced into a helical shape.
- the height of the bump 32 measured in the radial direction with respect to the axis of the shaft 31 and the distance of the extensions 32 measured in the longitudinal direction of the shaft 31 define the force with which the helical spring 14 bears against the apices of the extensions 32.
- the core element 22 consists in one piece of a molded plastic part.
- the wart-like extensions 32 are formed in one piece. Their axial extent is smaller than their axial distance from one another.
- the shaft 31 of which consists of an originally cylindrical metal wire instead of integrally molding the wart-shaped projections 32 onto a molded plastic part, there is also the possibility according to FIG. 6 of using a core element 22, the shaft 31 of which consists of an originally cylindrical metal wire.
- the projections or bumps 32 are formed by squeezing the starting material laterally, so that, as the cross section according to FIG. 4 shows, the material is forced radially outwards. "Ears" are created which protrude radially beyond the contour of the originally circular cross-section. The effect is the same as previously described with reference to the embodiment in FIG. 2.
- a compartment-forming device in a jacquard weaving machine points to the formation of the sub-compartment, for example a retraction spring, one of which is rigidly anchored in the weaving machine or on the ground.
- a core element is provided which rests on the inside of the spring at spaced apart locations and forces the spring to follow a course which deviates from the straight course. This creates frictional forces between the spring and the core element, which contribute to damping the spring movement.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Springs (AREA)
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/477,652 US7036532B2 (en) | 2001-05-17 | 2002-03-15 | Spring dampened shedding device |
JP2002589750A JP4240366B2 (ja) | 2001-05-17 | 2002-03-15 | ばね減衰ひ道形成装置 |
DE50212019T DE50212019D1 (de) | 2001-05-17 | 2002-03-15 | Fachbildeeinrichtung mit federdämpfung |
EP02727236A EP1387899B1 (de) | 2001-05-17 | 2002-03-15 | Fachbildeeinrichtung mit federdämpfung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10124022A DE10124022C2 (de) | 2001-05-17 | 2001-05-17 | Fachbildeeinrichtung mit Federdämpfung |
DE10124022.8 | 2001-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002092892A1 true WO2002092892A1 (de) | 2002-11-21 |
Family
ID=7685126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000958 WO2002092892A1 (de) | 2001-05-17 | 2002-03-15 | Fachbildeeinrichtung mit federdämpfung |
Country Status (8)
Country | Link |
---|---|
US (1) | US7036532B2 (de) |
EP (1) | EP1387899B1 (de) |
JP (1) | JP4240366B2 (de) |
CN (1) | CN100340704C (de) |
AT (1) | ATE391199T1 (de) |
DE (2) | DE10124022C2 (de) |
TN (1) | TNSN03114A1 (de) |
WO (1) | WO2002092892A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10329219B4 (de) * | 2003-06-28 | 2007-04-05 | Groz-Beckert Kg | Schaftstab mit beweglichem Litzendämpfungselement |
FR2857675B1 (fr) * | 2003-07-18 | 2006-01-13 | Staubli Sa Ets | Cadre lisses et metier a tisser pourvu d'au moins un tel cadre |
DE102004044783A1 (de) * | 2004-09-16 | 2006-03-30 | Deutsche Institute für Textil- und Faserforschung (DITF) Stuttgart | Fachbildeeinrichtung mit verformter Feder |
EP1908863B1 (de) | 2006-10-06 | 2009-04-08 | Groz-Beckert KG | Weblitze für Jacquardwebmaschine |
EP2166138A1 (de) * | 2008-09-23 | 2010-03-24 | Groz-Beckert KG | Jacquardlitze mit geprägtem Fadenaugenbereich |
FR3027313B1 (fr) * | 2014-10-16 | 2016-11-18 | Staubli Lyon | Lisse pour metier a tisser, metier a tisser equipe d'une telle lisse et procede de fabrication d'une telle lisse |
FR3027314B1 (fr) * | 2014-10-16 | 2019-04-26 | Staubli Lyon | Lisse pour metier a tisser et metier a tisser equipe d'une telle lisse |
FR3027315B1 (fr) * | 2014-10-16 | 2019-04-26 | Staubli Lyon | Lisse pour metier a tisser et metier equipe d'une telle lisse |
EP3112509A1 (de) * | 2015-07-02 | 2017-01-04 | NV Michel van de Wiele | Verbindungselement zum verbinden von elementen eines fachbildungsmechanismus für eine webmaschine |
CN106592049A (zh) * | 2017-01-10 | 2017-04-26 | 约科布·缪勒机械制造(中国)有限公司 | 一种防共振蛇形支架 |
GB2566092B (en) | 2017-09-04 | 2022-06-15 | Kristian Fjelldal Alf | An energy-absorbing structure for a tether line, and a tether line incorporating the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0678603A1 (de) * | 1994-04-19 | 1995-10-25 | Staubli-Verdol S.A. | Montagevorrichtung zur Befestigung des Endteils einer Spiralfeder an einem anderen Element |
FR2756849A1 (fr) * | 1996-12-06 | 1998-06-12 | Tardy Jean Jacques | Dispositif amortisseur pour ressort de lisse de metier a tisser jacquard |
EP0893521A1 (de) * | 1997-07-23 | 1999-01-27 | Staubli Lyon | Endstück für einen Webstuhlelement, Element mit einem solchen Endstück und Webstuhl mit einem solchen Element |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2072541U (zh) * | 1990-07-10 | 1991-03-06 | 黄高玉梅 | 织布控制提花装置 |
CN2103570U (zh) * | 1991-07-17 | 1992-05-06 | 张海林 | 精简提花选针机构 |
CN2175244Y (zh) * | 1993-06-19 | 1994-08-24 | 山东淄博毛巾厂 | 提花织机的提综装置 |
FR2800395B1 (fr) * | 1999-10-28 | 2002-03-15 | Staubli Lyon | Dispositif et ensemble de solidarisation de ressort de harnais jacquard et metier a tisser equipe d'un tel ensemble |
-
2001
- 2001-05-17 DE DE10124022A patent/DE10124022C2/de not_active Expired - Fee Related
-
2002
- 2002-03-15 AT AT02727236T patent/ATE391199T1/de active
- 2002-03-15 DE DE50212019T patent/DE50212019D1/de not_active Expired - Lifetime
- 2002-03-15 CN CNB028100115A patent/CN100340704C/zh not_active Expired - Lifetime
- 2002-03-15 US US10/477,652 patent/US7036532B2/en not_active Expired - Lifetime
- 2002-03-15 EP EP02727236A patent/EP1387899B1/de not_active Expired - Lifetime
- 2002-03-15 WO PCT/DE2002/000958 patent/WO2002092892A1/de active IP Right Grant
- 2002-03-15 JP JP2002589750A patent/JP4240366B2/ja not_active Expired - Fee Related
-
2003
- 2003-07-08 TN TNPCT/DE2002/000958A patent/TNSN03114A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0678603A1 (de) * | 1994-04-19 | 1995-10-25 | Staubli-Verdol S.A. | Montagevorrichtung zur Befestigung des Endteils einer Spiralfeder an einem anderen Element |
FR2756849A1 (fr) * | 1996-12-06 | 1998-06-12 | Tardy Jean Jacques | Dispositif amortisseur pour ressort de lisse de metier a tisser jacquard |
EP0893521A1 (de) * | 1997-07-23 | 1999-01-27 | Staubli Lyon | Endstück für einen Webstuhlelement, Element mit einem solchen Endstück und Webstuhl mit einem solchen Element |
Also Published As
Publication number | Publication date |
---|---|
DE10124022C2 (de) | 2003-04-10 |
US20040168735A1 (en) | 2004-09-02 |
JP4240366B2 (ja) | 2009-03-18 |
CN1509354A (zh) | 2004-06-30 |
EP1387899B1 (de) | 2008-04-02 |
CN100340704C (zh) | 2007-10-03 |
ATE391199T1 (de) | 2008-04-15 |
DE10124022A1 (de) | 2002-12-12 |
TNSN03114A1 (en) | 2005-04-08 |
US7036532B2 (en) | 2006-05-02 |
JP2004526883A (ja) | 2004-09-02 |
EP1387899A1 (de) | 2004-02-11 |
DE50212019D1 (de) | 2008-05-15 |
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