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 PDFInfo
- 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
Links
- 238000009941 weaving Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 description 9
- 230000000670 limiting effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
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 - 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 lowerstraight 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, afirst servomotor 5, on which first drive means are keyed; said first drive means are advantageously constituted, for example, by asprocket 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 thefirst servomotor 5 and therefore at the lower region of the column 9, proximate to the connection between the lowerstraight portion 10 of the tape guide and thecircular portion 4. - Such second servomotor supports, like the
first servomotor 5, second drive means, which are constituted by asprocket 8 keyed to its driving shaft. - The two
sprockets - 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 thesecond servomotor 6, which acts in step with thefirst 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)
- 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.
- 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.
- 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.
- The device according to one or more of the preceding claims, characterized in that said gripper supporting tape is made of rigid material.
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)
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 |
-
2005
- 2005-02-07 IT IT000170A patent/ITMI20050170A1/en unknown
-
2006
- 2006-01-24 AT AT06001471T patent/ATE412077T1/en not_active IP Right Cessation
- 2006-01-24 DE DE602006003236T patent/DE602006003236D1/en active Active
- 2006-01-24 EP EP06001471A patent/EP1688521B1/en not_active Not-in-force
- 2006-01-24 PL PL06001471T patent/PL1688521T3/en unknown
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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