EP1688521B1 - Device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines - Google Patents

Device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines Download PDF

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Publication number
EP1688521B1
EP1688521B1 EP06001471A EP06001471A EP1688521B1 EP 1688521 B1 EP1688521 B1 EP 1688521B1 EP 06001471 A EP06001471 A EP 06001471A EP 06001471 A EP06001471 A EP 06001471A EP 1688521 B1 EP1688521 B1 EP 1688521B1
Authority
EP
European Patent Office
Prior art keywords
servomotor
tape
supporting tape
gripper supporting
guide
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.)
Not-in-force
Application number
EP06001471A
Other languages
German (de)
French (fr)
Other versions
EP1688521A1 (en
Inventor
Sergio Trinca Colonel
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.)
Officina Meccanica Trinca Colonel Silvio & Figlio Sergio SNC
Original Assignee
Officina Meccanica Trinca Colonel Silvio & Figlio Sergio SNC
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 Officina Meccanica Trinca Colonel Silvio & Figlio Sergio SNC filed Critical Officina Meccanica Trinca Colonel Silvio & Figlio Sergio SNC
Priority to PL06001471T priority Critical patent/PL1688521T3/en
Publication of EP1688521A1 publication Critical patent/EP1688521A1/en
Application granted granted Critical
Publication of EP1688521B1 publication Critical patent/EP1688521B1/en
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
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels

Definitions

  • the present invention relates to a device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines. More particularly, the invention relates to a device for actuating the gripper supporting tape for inserting weft thread in shuttle-less looms, for making fabrics of any kind for various uses.
  • a gripper which has a hook for engaging the weft thread.
  • the gripper is moved with a reciprocating rectilinear motion synchronously with the beater of the loom and inserts the weft thread between the warp threads arranged on mutually parallel planes, so as to weave the fabric.
  • the gripper passes through the warp pitch up to its left end, where it engages the weft thread with its hook, and then, during the return stroke, it passes through the warp pitch, inserting the weft thread between the warp threads, thus weaving a portion of fabric.
  • Italian patent no. 1274294 by the same Applicant discloses an apparatus for actuating and controlling automatically the gripper supporting tape for inserting the weft thread in fabric-making machines.
  • the tape winds around a guide, which is constituted by a first straight portion, an arc-like portion, and a second straight portion arranged opposite the first straight portion.
  • the movement of the tape is a back-and-forth movement along the guide.
  • a servomotor is supported at the straight upper portion of the guide, at the end of the curved portion.
  • a sprocket is keyed to the servomotor and transmits the motion of the servomotor to the flexible tape along the guide, such tape supporting the gripper for inserting the weft thread between the warp threads.
  • Programming and control means allow to set and control the stroke of the flexible tape.
  • the flexible tape generates considerable friction along the guide and in particular at the curved portion thereof.
  • the tape used to support the gripper is of the flexible type, it is necessary to provide guiding hooks, which are fixed on the frame, are arranged between the warp threads, and allow to create a sort of guiding path for the flexible tape in order to allow a perfectly rectilinear movement thereof.
  • the aim of the present invention is to provide a device for actuating the gripper supporting tape for fabric-making machines which allows to minimize the friction between the tape and the guide along which the tape slides.
  • an object of the present invention is to provide a device for actuating the gripper supporting tape which allows to use an extremely rigid tape with increased dimensions, which is accordingly much more stable than conventional types of tapes.
  • Another object of the present invention is to provide a device for actuating the gripper supporting tape which allows to process very delicate fabrics at twice the current speeds.
  • Another object of the present invention is to provide a device for actuating the gripper supporting tape which allows to eliminate the presence of tape guiding hooks arranged on the weaving loom.
  • Another object of the present invention is to provide a device for actuating the gripper supporting tape which is highly reliable, relatively simple to manufacture, and at competitive costs.
  • the device for actuating the gripper supporting tape comprises a tape movement guide, which is composed of a first straight portion 2, which is connected to an arc-like circular portion 4, which in turn is connected to a second lower straight portion 10, which lies opposite the first straight portion.
  • the guide is connected to a weaving loom, which is not shown.
  • Supporting posts are further provided, in a known manner, which are adapted to support the first 2, and second 10, straight portions.
  • a supporting column 9 is provided at the upper and lower ends of the circular portion 4 of the guide, where the circular portion connects to the upper and lower straight portions.
  • a first servomotor 5, on which first drive means are keyed said first drive means are advantageously constituted, for example, by a sprocket 7, which transmits the motion to the gripper supporting tape, which is not shown.
  • the peculiarity of the invention consists in that it provides a second servomotor 6, which is arranged diametrically opposite the first servomotor 5 and therefore at the lower region of the column 9, proximate to the connection between the lower straight portion 10 of the tape guide and the circular portion 4.
  • Such second servomotor supports like the first servomotor 5, second drive means, which are constituted by a sprocket 8 keyed to its driving shaft.
  • the two sprockets 7 and 8, therefore, lie diametrically opposite along the column 9.
  • the tape can be extremely rigid, since the friction that occurs along the guide due to the contact of the tape with said guide is reduced considerably thanks to the presence of the second servomotor 6, which acts in step with the first servomotor 5, contributing to the actuation of the tape.
  • the tape can be made of extremely rigid material, for example carbon, with increased dimensions and accordingly is much more stable during the operation of the weaving loom.
  • the device according to the invention allows to process very delicate fabrics, thanks to the absence of the guiding hooks, at twice the current speed.
  • the device according to the invention fully achieves the intended aim and objects, since it allows to use an extremely rigid tape, reducing its friction with the guide and at the same time eliminating the guiding hooks that are conventionally present on the weaving loom.
  • the materials used may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A device for actuating the gripper supporting tape for inserting the weft thread among the warp threads, in weaving machines, comprising a guide for the gripper supporting tape, the guide being constituted by a first straight portion (2), which is connected to a semicircular portion (4), which in turn is connected to a second straight portion (10), a first servomotor (5), which is connected at the first straight portion (2) and is provided with first drive means (7) in order to transmit movement to the gripper supporting tape, the device further comprising a second servomotor (6), which is arranged diametrically opposite with respect to the first servomotor (5), at the second straight portion (10), and second drive means (8), which are keyed to the second servomotor (6) and are adapted to assist the first drive means (7) in order to transmit the motion to the gripper supporting tape.

Description

  • The present invention relates to a device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines. More particularly, the invention relates to a device for actuating the gripper supporting tape for inserting weft thread in shuttle-less looms, for making fabrics of any kind for various uses.
  • As is known, in looms for making fabrics, for example metallic fabrics, there is a gripper which has a hook for engaging the weft thread. The gripper is moved with a reciprocating rectilinear motion synchronously with the beater of the loom and inserts the weft thread between the warp threads arranged on mutually parallel planes, so as to weave the fabric.
  • During the outgoing stroke, the gripper passes through the warp pitch up to its left end, where it engages the weft thread with its hook, and then, during the return stroke, it passes through the warp pitch, inserting the weft thread between the warp threads, thus weaving a portion of fabric.
  • Italian patent no. 1274294 by the same Applicant discloses an apparatus for actuating and controlling automatically the gripper supporting tape for inserting the weft thread in fabric-making machines.
  • In this patent, the tape winds around a guide, which is constituted by a first straight portion, an arc-like portion, and a second straight portion arranged opposite the first straight portion. The movement of the tape is a back-and-forth movement along the guide. A servomotor is supported at the straight upper portion of the guide, at the end of the curved portion.
  • A sprocket is keyed to the servomotor and transmits the motion of the servomotor to the flexible tape along the guide, such tape supporting the gripper for inserting the weft thread between the warp threads.
  • Programming and control means allow to set and control the stroke of the flexible tape.
  • Although the solution described above is effective, it suffers some drawbacks.
  • First of all, the flexible tape generates considerable friction along the guide and in particular at the curved portion thereof.
  • Therefore, the tape must be extremely flexible so that it can slide along the guide without particular difficulty by way of the actuation of the sole servomotor.
  • Since the tape used to support the gripper is of the flexible type, it is necessary to provide guiding hooks, which are fixed on the frame, are arranged between the warp threads, and allow to create a sort of guiding path for the flexible tape in order to allow a perfectly rectilinear movement thereof.
  • The presence of the guiding hooks, however, can cause damage to the fabric, since such hooks are arranged, as mentioned, between the warp threads.
  • The aim of the present invention is to provide a device for actuating the gripper supporting tape for fabric-making machines which allows to minimize the friction between the tape and the guide along which the tape slides.
  • Within this aim, an object of the present invention is to provide a device for actuating the gripper supporting tape which allows to use an extremely rigid tape with increased dimensions, which is accordingly much more stable than conventional types of tapes.
  • Another object of the present invention is to provide a device for actuating the gripper supporting tape which allows to process very delicate fabrics at twice the current speeds.
  • Another object of the present invention is to provide a device for actuating the gripper supporting tape which allows to eliminate the presence of tape guiding hooks arranged on the weaving loom.
  • Another object of the present invention is to provide a device for actuating the gripper supporting tape which is highly reliable, relatively simple to manufacture, and at competitive costs.
  • This aim and these and other objects, which will become better apparent hereinafter, are achieved by a device as defiled in claim 1.
  • Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment of the actuation device according to the present invention, illustrated by way of non-limiting example in the accompanying drawings, wherein the only figure is a perspective view of the device for actuating the gripper supporting tape according to the present invention, with the weaving loom not shown since it is of a known type.
  • With reference to the figure, the device for actuating the gripper supporting tape according to the invention, generally designated by the reference numeral 1, comprises a tape movement guide, which is composed of a first straight portion 2, which is connected to an arc-like circular portion 4, which in turn is connected to a second lower straight portion 10, which lies opposite the first straight portion. The guide is connected to a weaving loom, which is not shown.
  • Supporting posts are further provided, in a known manner, which are adapted to support the first 2, and second 10, straight portions.
  • A supporting column 9 is provided at the upper and lower ends of the circular portion 4 of the guide, where the circular portion connects to the upper and lower straight portions.
  • In the upper region, at the column 9, there is, at the region that connects one another the first straight portion 2 and the circular portion 4, a first servomotor 5, on which first drive means are keyed; said first drive means are advantageously constituted, for example, by a sprocket 7, which transmits the motion to the gripper supporting tape, which is not shown.
  • The peculiarity of the invention consists in that it provides a second servomotor 6, which is arranged diametrically opposite the first servomotor 5 and therefore at the lower region of the column 9, proximate to the connection between the lower straight portion 10 of the tape guide and the circular portion 4.
  • Such second servomotor supports, like the first servomotor 5, second drive means, which are constituted by a sprocket 8 keyed to its driving shaft.
  • The two sprockets 7 and 8, therefore, lie diametrically opposite along the column 9.
  • Because of the presence of the second servomotor 6, the tape can be extremely rigid, since the friction that occurs along the guide due to the contact of the tape with said guide is reduced considerably thanks to the presence of the second servomotor 6, which acts in step with the first servomotor 5, contributing to the actuation of the tape.
  • Therefore, the tape can be made of extremely rigid material, for example carbon, with increased dimensions and accordingly is much more stable during the operation of the weaving loom.
  • In view of the inherent stability of the gripper supporting tape, it is no longer necessary to provide tape guiding hooks arranged along the loom, between the warp threads, with the advantage of avoiding damage which can occur to the fabric being woven.
  • Moreover, the presence of a double servomotor allows to increase the performance, since the load remains the same and the power is doubled with an equal inertia in the motor.
  • The device according to the invention allows to process very delicate fabrics, thanks to the absence of the guiding hooks, at twice the current speed.
  • In practice it has been found that the device according to the invention fully achieves the intended aim and objects, since it allows to use an extremely rigid tape, reducing its friction with the guide and at the same time eliminating the guiding hooks that are conventionally present on the weaving loom.
  • The device thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
  • In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements and to the state of the art.
  • Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims (4)

  1. A device for actuating the gripper supporting tape for a weaving machine for inserting the weft thread among the warp threads, comprising a guide for said gripper supporting tape, said guide being composed of a first straight portion (2) which is connected to a semicircular portion (4) which in turn is connected to a second straight portion (10), a first servomotor (5), which is connected at said first straight portion (2) and is provided with first drive means(7) in order to transmit movement to said gripper supporting tape, characterized in that it comprises a second servomotor (6), which is arranged diametrically opposite with respect to said first servomotor (5), at the second straight portion (10), and second drive means (8), which are keyed to said second servomotor (6) which acts in step with said first servomotor (5), contributing to the actuation of said gripper supporting tape, and in that said first and second servomotors (5,6) are arranged at opposite ends of a column (9) for supporting said first and second straight portions (2,10) of the guide of the gripper supporting tape.
  2. The device according to claim 1, characterized in that said first and second drive means (7,8) comprise sprockets which are keyed to said first and second servomotors (5,6) respectively.
  3. The device according to one or more of the preceding claims, characterized in that it comprises supporting posts, which are adapted to support said first and second straight portions (2,10) of said guide.
  4. The device according to one or more of the preceding claims, characterized in that said gripper supporting tape is made of rigid material.
EP06001471A 2005-02-07 2006-01-24 Device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines Not-in-force EP1688521B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06001471T PL1688521T3 (en) 2005-02-07 2006-01-24 Device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000170A ITMI20050170A1 (en) 2005-02-07 2005-02-07 DEVICE FOR THE OPERATION OF THE CLAMP-HOLDING TAPE FOR THE INSERTION OF THE WIRE OF MESH IN MACHINES FOR THE PRODUCTION OF FABRICS

Publications (2)

Publication Number Publication Date
EP1688521A1 EP1688521A1 (en) 2006-08-09
EP1688521B1 true EP1688521B1 (en) 2008-10-22

Family

ID=36202506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06001471A Not-in-force EP1688521B1 (en) 2005-02-07 2006-01-24 Device for actuating the gripper supporting tape for inserting weft thread in fabric-making machines

Country Status (5)

Country Link
EP (1) EP1688521B1 (en)
AT (1) ATE412077T1 (en)
DE (1) DE602006003236D1 (en)
IT (1) ITMI20050170A1 (en)
PL (1) PL1688521T3 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES213546Y (en) * 1975-06-27 1976-11-16 Ingenieria Aplicada, S. A.(Inapsa) IMPROVED LAUNCH MECHANISM ON LOOMS WITHOUT SHUTTLE.
US4427037A (en) * 1981-10-16 1984-01-24 James Mackie & Sons Ltd. Shuttleless looms
JP4595187B2 (en) * 2000-10-12 2010-12-08 株式会社豊田自動織機 Weft insertion device in rapier loom

Also Published As

Publication number Publication date
ATE412077T1 (en) 2008-11-15
EP1688521A1 (en) 2006-08-09
DE602006003236D1 (en) 2008-12-04
ITMI20050170A1 (en) 2006-08-08
PL1688521T3 (en) 2009-04-30

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