US20180073171A1 - Adjustment of the mutual position of the latitudinal parts of a fabric guiding device - Google Patents

Adjustment of the mutual position of the latitudinal parts of a fabric guiding device Download PDF

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Publication number
US20180073171A1
US20180073171A1 US15/557,768 US201615557768A US2018073171A1 US 20180073171 A1 US20180073171 A1 US 20180073171A1 US 201615557768 A US201615557768 A US 201615557768A US 2018073171 A1 US2018073171 A1 US 2018073171A1
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United States
Prior art keywords
bridge
lower bridge
guiding device
upper bridge
fabric guiding
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Abandoned
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US15/557,768
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English (en)
Inventor
Koen Bruynoghe
Sander Goethals
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Individual
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Individual
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Assigned to NV MICHEL VAN DE WIELE reassignment NV MICHEL VAN DE WIELE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GOETHALS, Sander, BRUYNOGHE, KOEN
Publication of US20180073171A1 publication Critical patent/US20180073171A1/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/16—Double-plush looms, i.e. for weaving two pile fabrics face-to-face
    • D03D39/18—Separating the two plush layers, e.g. by cutting

Definitions

  • the present disclosure relates, on the one hand, to a fabric guiding device for a face-to-face weaving machine, comprising a cutting knife and an upper bridge and a lower bridge which are positionable at adjustable distances from one another and from the cutting knife by means of drive means.
  • the present disclosure relates to a method for displacing a lower bridge and/or upper bridge.
  • the present disclosure further relates to a face-to-face weaving machine provided with a fabric guiding device according to the disclosure.
  • upper bridge and lower bridge are used to refer to the cross beams which are secured above and underneath the fabric over the weaving width of the machine and which serve to guide the fabrics in the direction of the cutting knife.
  • the space between the upper bridge and the lower bridge is also referred to as the jaw.
  • two fabrics are woven simultaneously, usually one above the other, each of which comprises a base fabric consisting of weft yarns and warp yarns.
  • these base fabrics are connected to one another with the aid of pile warp yarns which move from the bottom base fabric to the top base fabric and vice versa in a pattern-forming manner.
  • the two fabrics (which together form the non-separated face-to-face fabric) are then moved together through the opening formed between the upper bridge and the lower bridge.
  • These two fabrics in the non-separated face-to-face fabric are kept apart over a distance which substantially corresponds to the distance between upper bridge and lower bridge (the jaw height).
  • a plurality of lancets extends in the warp direction over the width of the weaving machine into the jaw, between the lower and upper base fabric.
  • the non-separated face-to-face fabric is then supplied to the cutting device which will use a cutting knife to perform a cutting operation, thus forming two fabrics with cut pile.
  • the adjustment of this jaw is a delicate process involving: setting a specific, exact value of the jaw height;
  • the cutting device is firstly provided with one or more electronic position sensors emitting a signal which is respectively in relation to the position of the upper bridge and the lower bridge with respect to the cutting knife.
  • the upper bridge and the lower bridge are each provided with adjusting spindles at their ends, which can optionally be driven by an electric motor in order to facilitate the adjustment of the upper bridge and the lower bridge.
  • An object of some embodiments of the present invention is therefore to provide a simplified fabric guiding device for a face-to-face weaving machine, by means of which it is possible to automatically and accurately adjust, on the one hand, both the mutual position of the upper bridge and the lower bridge (jaw height) and, on the other hand, the position with respect to a reference in the weaving machine, for example the cutting position.
  • the cutting position may be defined as the line of successive positions of the tip of the cutting knife during the cutting operation.
  • the movement of a point on the upper surface or lower surface of the cutting knife may be chosen, in which case, furthermore, half the thickness of the cutting knife is taken into account in order to approximate the actual cutting position as accurately as possible
  • a fabric guiding device for a face-to-face weaving machine comprising a cutting knife and an upper bridge and a lower bridge which are positionable at adjustable distances from one another and from the cutting knife by means of drive means, wherein the device comprises coupling means which are switchable between a first position in which the upper bridge and the lower bridge are coupled to one another, as a result of which the upper bridge and the lower bridge are positionable together with the aid of said drive means, and a second position in which the upper bridge and the lower bridge are decoupled from one another so that only the upper bridge or only the lower bridge is positionable with the aid of the drive means.
  • jaw height since the known devices for face-to-face weaving machines conduct the positioning of the bridges in a vertical plane.
  • jaw height means the perpendicular distance between the upper bridge and the lower bridge.
  • the coupling means used in the fabric guiding device according to the invention preferably has a defined operative state when it is de-energized, either of the ‘normally open’ type or the ‘normally closed’ type.
  • the coupling means preferably comprises spring elements which are energized or de-energized in order to bring about or cancel the coupling.
  • the drive means comprise a first and second drive means, wherein the first drive means is provided at one end of the bridge which is positionable when the coupling means are switched into their second position and wherein the second drive means is provided at the other end of said bridge.
  • the drive means may also comprise a third drive means which is provided in the middle of the lower bridge.
  • the lower bridge is thus positionable in both the first and the second position of the coupling means, and said coupling means are switchable between a first position in which the lower bridge and the upper bridge are coupled to one another, as a result of which they are positionable together, and a second position in which only the lower bridge is positionable.
  • the drive means comprise hydraulic or electric actuators.
  • the drive means comprise one or more screw means which are provided in order to position the upper bridge and the lower bridge with respect to one another and with respect to the cutting knife and the drive means comprise at least one electric motor which is provided in order to rotate the screw means for adjusting the said bridges.
  • An example of a drive means according to the invention is a motor/spindle combination, optionally provided with a gear unit.
  • this comprises one or more position sensors for determining the position of the upper bridge, the lower bridge and the cutting knife.
  • the position sensors After calibration, for example with the aid of a first selected jaw adjustment with manual measurement of the distance of the lower bridge and the upper bridge from one another and with respect to the cutting position (cutting knife), the position sensors are suitable for determining the relative positions of the upper bridge, the lower bridge and the cutting knife.
  • the position sensors are at least provided at both ends of both the lower bridge and the upper bridge. Furthermore, in a preferred embodiment, it is also possible to provide position sensors at both ends at the height of the cutting position. In a more preferred embodiment, one or more position sensors are likewise also provided at (or in the vicinity of) the middle of one of the bridges, for example the lower bridge. This (these) position sensor(s) is (are) particularly suitable for detecting the position of the bridge at the middle, in order to thus check whether or not the bridge has undergone bending. This bending is the result of the own weight of the bridge and/or of the forces exerted by the fabric on the bridge resulting from the yarn tension.
  • the position sensors used in the device are preferably of the following types: contact-based or contactless, such as optical (laser) or inductive, for example.
  • the device comprises first clamping means which are provided to release the upper bridge and the lower bridge and secure them in the set position.
  • the device furthermore comprises second clamping means which are provided to release the lower bridge between both ends and secure it again when the desired position has been reached.
  • the second clamping means are particularly suitable as auxiliary means to compensate for the abovementioned bending.
  • first clamping means and/or second clamping means are suitable to be operated manually.
  • first clamping means and/or second clamping means are suitable to be operated automatically.
  • first clamping means and/or second clamping means comprise pneumatic, hydraulic or electric actuators.
  • the first clamping means or the first clamping means and/or second clamping means are provided to connect the upper bridge or the lower bridge, respectively, to the chassis of a weaving machine.
  • the present invention also relates to a face-to-face weaving machine provided with a fabric guiding device according to the invention, as described above.
  • the weaving machine or the fabric guiding device according to the invention can further be provided with means for inputting the desired jaw height and for displaying the positions measured by the position sensors.
  • Another subject of the present disclosure relates to a method for positioning a lower bridge and/or an upper bridge of a fabric guiding device of a face-to-face weaving machine, wherein the upper bridge and the lower bridge are positionable by means of drive means and wherein the fabric guiding device furthermore comprises coupling means which are switchable between a first and a second position, wherein the coupling means are switched to the first position, in which the lower bridge and the upper bridge are coupled to each other, to position the lower bridge and the upper bridge together, and wherein the coupling means are switched to the second position, in which the lower bridge and the upper bridge are uncoupled from each other, so that only the upper bridge or only the lower bridge is positionable by means of the drive means.
  • the coupling means is switched into the first position first in order to displace both bridges together, and subsequently into the second position in order to move only the upper bridge or only the lower bridge to the desired position.
  • the method is particularly suitable for being applied to the fabric guiding device described in this application. More particularly, the method is suitable for being applied to a fabric guiding device comprising: first and second clamping means, a lancet device, etc.
  • a further preferred method according to the invention comprises at least one of the following preparatory steps in a desired change of relative position of the lower bridge and the upper bridge with respect to one another or with respect to a cutting knife:
  • the method according to the invention may comprise at least one of the following steps:
  • the method according to the invention may further comprise at least one of the steps described below in order to re-prepare the weaving machine for weaving:
  • an analogue method with an embodiment of the fabric guiding device according to the invention in which only the upper bridge is positionable with the coupling means switched into their second position, also forms part of the present invention.
  • This analogue method comprises at least one of the same preparatory steps as in the case of a desired change of relative position of the lower bridge and the upper bridge with respect to one another or with respect to a cutting knife and at least one of the same steps in order to re-prepare the weaving machine for weaving, as described above for the embodiment in which only the lower bridge is positionable with the coupling means switched into their second position.
  • said analogue method comprises at least one of the following steps:
  • FIG. 1 shows a perspective view of a fabric guiding device according to the invention with the lower bridge and the upper bridge in the coupled position;
  • FIG. 2 shows a front view of the device illustrated in FIG. 1 ;
  • FIG. 3 shows a rear view of the device illustrated in FIG. 1 ;
  • FIG. 4 shows a detail view of the area B encircled in FIG. 2 ;
  • FIG. 5 shows a detail view of the area C encircled in FIG. 3 ;
  • FIG. 6 shows a detail view of the area A encircled in FIG. 1 .
  • the fabric guiding device ( 1 ) for a face-to-face weaving machine according to an embodiment of the present invention and illustrated in FIGS. 1 to 3 comprises a cutting knife ( 8 ) and an upper bridge ( 2 ) and a lower bridge ( 3 ) which are positionable with the aid of drive means ( 4 a ; 4 b ) at an adjustable distance from one another and from the cutting knife.
  • the cutting knife is movable on a guide which is securely connected to the machine frame.
  • the drive means ( 4 a ; 4 b ) comprise a first ( 4 a ) and second ( 4 b ) drive means.
  • the drive can be realized electrically (screw spindle+servomotor+gear unit) or hydraulically (hydraulic servo cylinders).
  • the drive means ( 4 a ; 4 b ) are mechanically connected to the ends of the lower bridge ( 3 ).
  • the system which guarantees the vertical movement of the lower bridge mainly comprises a mounted screw spindle and a servomotor with a gear unit.
  • the upper bridge ( 2 ) does not have its own drive for its positioning.
  • the device ( 1 ) comprises coupling means ( 5 ) which are switchable between a first position in which the upper bridge ( 2 ) and the lower bridge ( 3 ) are coupled to one another, as a result of which the upper bridge ( 2 ) and the lower bridge ( 3 ) are positionable together with the aid of said drive means ( 4 a ; 4 b ), and a second position in which the upper bridge ( 2 ) and the lower bridge ( 3 ) are decoupled from one another so that only the lower bridge ( 3 ) is positionable with the aid of the drive means ( 4 a ; 4 b ).
  • the mechanical connection between the lower bridge ( 3 ) and the upper bridge ( 2 ) can be engaged or disengaged at any position.
  • the mechanical connection is achieved by an adjustable mechanical locking element or with the aid of a connection based on friction (clamping based on hydraulic machine clamps), optionally combined with said adjustable mechanical locking element.
  • the mechanical locking element can be actuated electrically, hydraulically or pneumatically. For instance, it is possible to first bring the upper bridge ( 2 ) into position in order to then disengage the mechanical connection and subsequently to bring the lower bridge ( 3 ) into position. Once the set position has been reached, the lower bridge ( 3 ) and the upper bridge ( 2 ) are secured in this position. To this end, the device ( 1 ) is provided with first clamping means ( 6 ).
  • the device ( 1 ) comprises second clamping means ( 7 ) which are provided in order to secure the lower bridge ( 3 ) between its two ends when the desired position has been reached.
  • This support is passive. In the context of the invention, passive support is understood to mean that a certain middle position can be guaranteed, but that the support itself cannot change this position. The following text contains an explanation of this passive support.
  • the desired positions of the ends of the lower bridge ( 3 ) will also be used as the basis for a desired middle position.
  • the desired middle position will always be in relation to the position of the ends of the lower bridge ( 3 ).
  • the system for middle support by means of second clamping means ( 7 ) is provided with several second clamping means ( 7 ), distributed across the distance between the ends of the lower bridge ( 3 ).
  • the middle support is activated when the desired middle position has been reached.
  • the desired middle position of the lower bridge is realized by moving the entire lower bridge upwards/downwards until the desired middle position has been reached. At that point, the middle support is activated and this middle position is thus secured.
  • the system of passive support described above can be expanded, as explained below, to include an ‘active’ component.
  • Active is used to refer to the fact that the support can not only secure the middle position but that this system is also able to change this position itself independently of the ends of the lower bridge.
  • This expansion does require an additional (third) drive means which is positioned in the vicinity of the middle and which is able to compensate for the bending of the lower bridge in a simple manner.
  • the position is secured by clamping both ends of the bridges against the supports via the first clamping means ( 6 ). This removes any degree of freedom.
  • These supports are mounted against the chassis of the machine.
  • the connection is based to a significant extent on friction.
  • This clamping may be achieved by manually adjustable bolted connections or, alternatively, by means of machine clamps which can be automatically engaged and disengaged.
  • the machine clamps operate on the basis of hydraulic pressure or on the basis of a mechanical spring which can be hydraulically disengaged.
  • the machine clamps move together with the bridges, which is possible owing to the fact that grooves are present in the supports and because the clamps can assume different positions on the bridges.
  • the bridges are clamped during the operation of the machine; the clamps are only released in order to carry out positioning.
  • the load on the system for positioning can be reduced by reducing the tension on the yarns during the positioning of the upper bridge and/or the lower bridge and/or by adjusting the angle of the yarn with the horizontal plane.
  • the machine control unit Prior to the positioning, the machine control unit will lower the yarn tension on the lower bridge and the upper bridge and/or adjust the position of the weaving frames. After the positioning, these changes will be reversed.
  • the fabric guiding device ( 1 ) can also be provided with position sensors ( 9 ) arranged at both ends of the device, either to measure the distance of both the upper bridge ( 2 ) and the lower bridge ( 3 ) from the cutting knife ( 8 ) or to measure the mutual distance between the upper bridge ( 2 ) and the lower bridge ( 3 ), or both. These measurement signals recorded by the position sensors ( 9 ) can be displayed within the visual field of the user (operator).
  • the position sensors used are, for example, contactless sensors such as those based on laser beams, for example.
  • a processor unit can also be used in order to move the upper bridge ( 2 ) and/or the lower bridge ( 3 ) over a specified distance via the drive means in combination with the signals from the position sensors.
  • the first ( 4 a ) and the second ( 4 b ) drive means are preferably actuated synchronously.
  • the fabric guiding device ( 1 ) can also be provided with one or more position sensors in the middle of the lower bridge. With the display of the measurement signals from this (these) position sensor(s) in combination with the desired middle position of the lower bridge, the user can minimize the bending of the lower bridge during the positioning of the lower bridge. If there are no position sensors in the middle of the lower bridge, the user can provide the processor unit with a (manual) measurement value for the bending of the lower bridge, so that it is still possible to take into account the bending during the movement of the lower bridge and thus minimize the bending to the greatest possible extent.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US15/557,768 2015-03-12 2016-03-10 Adjustment of the mutual position of the latitudinal parts of a fabric guiding device Abandoned US20180073171A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE20155135A BE1022813A9 (nl) 2015-03-12 2015-03-12 Regeling van de onderlinge positie van de breedtestukken van een weefselgeleidingsinrichting
BEBE2015/5135 2015-03-12
PCT/IB2016/051369 WO2016142899A1 (en) 2015-03-12 2016-03-10 Adjustment of the mutual position of the latitudinal parts of a fabric guiding device

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US20180073171A1 true US20180073171A1 (en) 2018-03-15

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US15/557,768 Abandoned US20180073171A1 (en) 2015-03-12 2016-03-10 Adjustment of the mutual position of the latitudinal parts of a fabric guiding device

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US (1) US20180073171A1 (zh)
EP (1) EP3268522B1 (zh)
CN (1) CN107257870B (zh)
BE (1) BE1022813A9 (zh)
WO (1) WO2016142899A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018211531B4 (de) 2018-07-11 2020-03-05 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Webmaschine sowie Verfahren zum Führen eines Gewebes in einer Webmaschine

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204669A (en) * 1963-07-03 1965-09-07 Morgan Valentine Co Inc L Manufacture of cut pile fabrics
US3406725A (en) * 1966-01-18 1968-10-22 G H Norton & Company Ltd Variable height pile cutting means for double pile fabric looms and the method therefor
US3993105A (en) * 1974-10-29 1976-11-23 Patax Trust Reg. Method of and a machine for manufacturing nap fabric strip closure devices
US4176692A (en) * 1978-08-21 1979-12-04 Cox Foundry & Machine Co. Rotating driving mechanism for imparting reciprocatory motion to a driven element
US4261391A (en) * 1976-12-27 1981-04-14 Girmes-Werke Ag Apparatus for separating double plush cloth webs
US4478255A (en) * 1982-05-26 1984-10-23 Societe Alsacienne De Construction De Materiel Textile Devices for cutting pile threads in a loom for weaving velvet in a double layer
US4561473A (en) * 1983-06-30 1985-12-31 Kawashima Textile Manufacturers Ltd. Double-pile loom
US4892120A (en) * 1987-10-10 1990-01-09 N.V. Michael Van de Weile Apparatus for regulating the jaw of the cutting rails in face-to-face weaving looms
US5826624A (en) * 1993-03-03 1998-10-27 Genkinger Hebe- Und Foerderchnik Gmbh Process and device for paralleling a transport carriage
US20040238061A1 (en) * 2003-04-23 2004-12-02 Dominique Maes Symmetrical measurement of jaw
US7644737B2 (en) * 2005-09-02 2010-01-12 Textilma Ag Method for production of a velvet ribbon with double-sided nap and ribbon weaving machine for carrying out said method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1505182B1 (de) * 2003-07-30 2007-05-23 Stäubli GmbH Schneidvorrichtung für das Trennen von Doppelflorgewebe
CN101487161A (zh) * 2009-02-20 2009-07-22 常州市悦腾机械有限公司 双层绒坯布切割通道对称调节装置

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204669A (en) * 1963-07-03 1965-09-07 Morgan Valentine Co Inc L Manufacture of cut pile fabrics
US3406725A (en) * 1966-01-18 1968-10-22 G H Norton & Company Ltd Variable height pile cutting means for double pile fabric looms and the method therefor
US3993105A (en) * 1974-10-29 1976-11-23 Patax Trust Reg. Method of and a machine for manufacturing nap fabric strip closure devices
US4261391A (en) * 1976-12-27 1981-04-14 Girmes-Werke Ag Apparatus for separating double plush cloth webs
US4176692A (en) * 1978-08-21 1979-12-04 Cox Foundry & Machine Co. Rotating driving mechanism for imparting reciprocatory motion to a driven element
US4478255A (en) * 1982-05-26 1984-10-23 Societe Alsacienne De Construction De Materiel Textile Devices for cutting pile threads in a loom for weaving velvet in a double layer
US4561473A (en) * 1983-06-30 1985-12-31 Kawashima Textile Manufacturers Ltd. Double-pile loom
US4892120A (en) * 1987-10-10 1990-01-09 N.V. Michael Van de Weile Apparatus for regulating the jaw of the cutting rails in face-to-face weaving looms
US5826624A (en) * 1993-03-03 1998-10-27 Genkinger Hebe- Und Foerderchnik Gmbh Process and device for paralleling a transport carriage
US20040238061A1 (en) * 2003-04-23 2004-12-02 Dominique Maes Symmetrical measurement of jaw
US7438093B2 (en) * 2003-04-23 2008-10-21 N.V. Michel Van De Wiele Symmetrical measurement of jaw
US7644737B2 (en) * 2005-09-02 2010-01-12 Textilma Ag Method for production of a velvet ribbon with double-sided nap and ribbon weaving machine for carrying out said method

Also Published As

Publication number Publication date
CN107257870B (zh) 2019-10-18
EP3268522A1 (en) 2018-01-17
EP3268522B1 (en) 2019-05-29
WO2016142899A1 (en) 2016-09-15
BE1022813A9 (nl) 2016-10-04
BE1022813B1 (nl) 2016-09-13
BE1022813A1 (nl) 2016-09-13
CN107257870A (zh) 2017-10-17

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