Claims
- 1. Apparatus for winding thread supplied at a constant speed and with a traversing thread guide onto a cross-wound bobbin so that variations in thread tension are automatically compensated for, said apparatus comprising:
- a drive shaft driven at a constant rotational speed;
- a drive roll for driving the bobbin during the winding operation, supported about an axis defined by said drive shaft for free rotation thereabout in a fixed axial position;
- compact variable speed transmission means for controllably transmitting selected amounts of rotational power from said drive shaft to said drive roll, said transmission means including at least a two-stage mechanism with a drive member rotatably supported on the same axis supporting said drive roll so as to minimize space required by said transmission means, an output member receiving rotational power from said drive member and mounted on an axis separate therefrom, rotatable coupling means for drivingly coupling said drive roll to said output member for transmission of rotational power to said drive roll, and an actuable transmission member for effecting changes in said rotational power transmitted to said drive roll through said rotatable coupling means by varying a drive ratio between said drive member and said output member, actuation of said actuable transmission member being isolated from said rotatable coupling means;
- first regulating means for measuring tension in thread being wound on the bobbin and detecting variations therein, for automatically compensating for minor variations in said tension such as periodic fluctuations induced by operation of the transversing thread guide, and for outputting an indication of detected variations outside a predetermined range of thread-tension limiting values;
- stabilizing means for biasing said first regulating means relative thread being wound on the bobbin so as to tend to maintain said first regulating means in a fixed position corresponding to a given yarn tension, so that said first regulating means stably reacts to changes in the tension of such thread;
- second regulating means, responsive to said indication output by said first regulating means, for actuating said variable speed transmission means actuable transmission member to vary the rotational speed of said drive roll so as to wind thread onto the bobbin at uniform tension throughout the winding process; and
- restoring means, operative with said second regulating means, for urging same towards a basic position so as to maintain thread tension by biasing said second regulating means for greatest drive roll rotational speed within a determined range of thread-tension variations, so as to maintain an effective compensation range for said second regulating means; whereby
- uniform tension without respect to changes in the weight of the bobbin as thread is wound thereon is achieved with stable operation, which includes compensating for periodic thread-tension fluctuations while tending to prevent thread-tension limiting values from being exceeded due to varying of bobbin drive roll speed.
- 2. An apparatus as set forth in claim 1, wherein said drive member and said output member comprise friction mating conical rolls, and said actuable transmission member thereof comprises an axially movable transmitting member, interposed between said conical rolls.
- 3. An apparatus as set forth in claim 2, wherein said transmitting member comprises a rigid collar interposed between said conical rolls.
- 4. An apparatus as set forth in claim 3, wherein the outer surfaces of said collar have conicities matching the conicities of said conical rolls of said variable speed transmission means.
- 5. An apparatus as set forth in claim 2, further comprising a return device for returning said transmitting member to an adjustable basic position, which position determines the maximum amount of rotational power transmitted by said transmission means.
- 6. An apparatus as set forth in claim 5, further including an adjustable stop, placement of which establishes said basic position.
- 7. An apparatus as set forth in claim 6, further including an adjusting fork which is stressed by said return device, with movement of said transmitting member and said fork being controlled by said adjustable stop.
- 8. An apparatus as set forth in claim 7 wherein said adjustable stop is disposed on said adjusting fork.
- 9. An apparatus as set forth in claim 5, wherein said return device comprises a return spring.
- 10. An apparatus as set forth in claim 5, wherein: said return device comprises converging outer surfaces of said conical rolls.
- 11. An apparatus set forth in claim 10, wherein the conical roll forming said output member is mounted on an axle which is inclined relative to said drive shaft carrying the conical roll forming the drive member.
- 12. An apparatus as set forth in claim 11, further including means for adjusting the inclination of the axle of the cone wheel forming said output part.
- 13. An apparatus as set forth in claim 12 further comprising a lever on which said adjustable axle is mounted, and an adjusting cam associated therewith for adjusting same.
- 14. An apparatus as set forth in claim 10, wherein the conical rolls have different conicities.
- 15. An apparatus as set forth in claim 14, wherein the outer surfaces of the transmitting member have different conicities matching the conicities of the conical rolls.
- 16. An apparatus as set forth in claim 1, wherein said actubale transmission member is continuously engaged between said drive member and said output member.
- 17. An apparatus as set forth in claim 1 wherein said first regulating means includes a resiliently mounted bar which presses against the thread during operation of said apparatus.
- 18. An apparatus as set forth in claim 17, wherein the resiliency of said bar is selected to permit bar movement of a predetermined distance to compensate for minor variations in thread tension before said first regulating means indication is output to said second regulating means.
- 19. Apparatus as set forth in claim 18, further comprising linkages resiliently connecting said bar to said second regulating means and adapted to adjust the amount of rotational power said variable transmission means transmits between said drive shaft and said drive roll mounted freely rotatable about said drive shaft.
- 20. An apparatus as set forth in claim 19, wherein said linkages comprise a connecting rod, extending between said first and second regulating means with a guide member for receiving said connecting rod, and an adjustable stop received on said rod for limiting movement thereof.
- 21. An apparatus as set forth in claim 18, further including electronically-operative associating means between said bar and said second regulating means for varying the drive speed of said drive roller.
- 22. An apparatus as set forth in claim 18, further comprising a slotted connection located between said bar and said second regulating means for adjusting said variable transmission means.
- 23. An apparatus as set forth in claim 22, further including means for adjusting the length of the slot in the slotted connection.
- 24. An apparatus a set forth in claim 17, wherein said first regulating means includes a nose element extending parallel to said drive roll, adaped for external actuation with a servicing device.
- 25. An apparatus as set forth in claim 17, wherein said first regulating means includes a member made out of a plastic material.
- 26. An apparatus as set forth in any one of claims 1, 2, or 16, wherein said drive shaft extends through said drive roll, with said drive roll supported thereon for free rotation about said drive shaft.
- 27. An apparatus as set forth in claim 1, wherein said coupling means includes gear means.
- 28. An apparatus as set forth in claim 1, wherein said coupling means includes a cord drive device.
- 29. An apparatus as set forth in claim 1, wherein said apparatus winds conical cross-wound bobbins and wherein said rotatable coupling means is situated adjacent to the smaller diameter of such conical cross-wound bobbin.
- 30. An apparatus as set forth in claim 29, wherein the drive roll has at least two loose pulleys and a drive pully arranged between said loose pulleys.
- 31. An apparatus as set forth in claim 30, further including means for arranging sid drive pulley between said loose pulleys in a manner which permits it to be offset in the axial direction towards the larger diameter of the conical cross-wound bobbin.
- 32. An apparatus as set forth in claim 30, wherein said drive pulley is connected through a sleeve-like connecting piece to a drive element which is provided relatively adjacent one axial end of said drive roll and is driven by said variable speed transmission means, wherein said loose pulley disposed between said drive pulley and said drive element are mounted on such connecting piece.
- 33. An apparatus as set forth in claim 32, wherein the drive pulley has, on its end facing away from the sleeve like connecting piece, a sleeve like extension for mounting at least one further loose pulley.
- 34. An apparatus as set forth in claim 1, wherein the drive roll has a profiled drive surface for enhancing thread take-up on said bobbin.
- 35. Apparatus for winding thread supplied at a constant speed and with a traversing thread guide onto a cross-wound bobbin so that variations in thread tension are automatically compensated for, said apparatus comprising:
- a drive shaft driven at a constant rotational speed;
- a drive roll for driving the bobbin during the winding operation, supported about said drive shaft for free rotation thereabout in a fixed axial position;
- variable speed transmission means for controllably transmitting selected amounts of rotational power from said drive shaft to said drive roll, rotatable coupling means for drivingly coupling said drive roll to said variable speed transmission means for transmission of rotational power to said drive roll, said transmission means including at least a two-stage mechanism with an actuable transmission member for effecting changes in said rotational power transmitted through said rotatable coupling means to said drive roll so that actuation of said actuable transmission member is isolated from said rotatable coupling means;
- first regulating means for measuring tension in thread being wound on the bobbin and detecting variations therein, for automatically compensating for minor variations in said tension such as periodic fluctuations induced by operation of the traversing thread guide, and for outputting an indication of detected variations outside a predetermined range;
- second regulating means, responsive to said indication output by said first regulating means, for actuating said variable speed transmission means actuable transmission member to vary the rotational speed of said drive roll so as to wind thread onto the bobbin at uniform tension throughout the winding process; and
- return means for biasing said variable speed transmission means actuable transmission member to an adjustable basic position, which position determines the maximum amount of rotational power transmitted by said transmission means.
- 36. Apparatus for winding thread supplied at a constant speed and with a traversing thread guide onto a cross-wound bobbin so that variations in thread tension are automatically compensated for, said apparatus comprising:
- a drive shaft driven at a constant rotational speed;
- a drive roll for driving the bobbin during the winding operation, supported about said drive shaft for fee rotation thereabout in a fixed axial position;
- variable speed transmission means for controllably transmitting selected amounts of rotational power from said drive shaft to said drive roll, rotatably coupling means for drivingly coupling said drive roll to said variable speed transmission means for transmission of rotational power to said drive roll, said transmission means including at least a two-stage mechanism with an actuable transmission member for effecting changes in said rotational power transmitted through said rotatable coupling means to said drive roll so that actuation of said actuable transmission member is isolated from said rotatable coupling means;
- first regulating means for measuring tension in thread being wound on the bobbin and detecting variations therein, for automatically compensating for minor variations in said tension such as periodic fluctuations induced by operation of the traversing thread guide, and for outputting an indication of detected variations outside a predetermined range; and
- second regulating means, responsive to said indication output by said first regulating means, for actuating said variable speed transmission means actuable transmission member to vary the rotational speed of said drive roll so as to wind thread onto the bobbin at uniform tension throughout the winding process; wherein
- said first regulating means includes a resiliently mounted bar which presses against the thread during operation of said apparatus, and further includes a nose element extending parallel to said drive roll, adapted for external actuation with a servicing device.
- 37. Apparatus for winding thread supplied at a constant speed and with a traversing thread guide onto a cross-wound bobbin so that variations in thread tension are automatically compensated for, said apparatus comprising:
- a drive shaft driven at a constant rotational speed;
- a drive roll for driving the bobbin during the winding operation, supported about said drive shaft for free rotation thereabout in a fixed axial position;
- variable speed transmission means for controllably transmitting selected amounts of rotational power from said drive shaft to said drive roll, rotatable coupling means for drivingly coupling said drive roll to said variable speed transmission means for transmission of rotational power to said drive roll, said transmission means including at least a two-stage mechanism with an actuable transmission member for effecting changes in said rotational power transmitted through said rotatable coupling means to said drive roll so that actuation of said acutable transmission member is isolated from said rotatable coupling means;
- first regulating means for measuring tension in thread being wound on the bobbin and detecting variations therein, for automatically compensating for minor variations in said tension such as periodic fluctuations induced by operation of the traversing thread guide, and for outputting an indication of detected variations outside a predetermined range; and
- second regulating means, responsive to said indication output by said first regulating means, for actuating said variable speed transmission means actuable transmission member to vary the rotational speed of said drive roll so as to wind thread onto the bobbin at uniform tension throughout the winding process; wherein
- said first regulating means includes a resiliently mounted bar which presses against the thread during operation of said apparatus and accepts minor variations in tension of such thread without outputting said first regulating means indicating; and wherein said apparatus further includes
- a slotted connection, including an adjustable length slot, located between said bar and said second regulating means for adjusting said variable speed transmission means.
- 38. Apparatus for winding thread supplied at a constant speed and with a traversing thread guide onto a cross-wound bobbin so that variations in thread tension are automatically compensated for, said apparatus comprising:
- a drive shaft driven at a constant rotational speed;
- a drive roll for driving the bobbin during the winding operation, supported about said drive shaft for free rotation thereabout in a fixed axial position;
- variable speed transmission means for controllably transmitting selected amounts of rotational power from said drive shaft to said drive roll, rotatable coupling means for drivingly coupling said drive roll to said variable speed transmission means for transmission of rotational power to said drive roll, said transmission means including at least a two-stage mechanism with an actuable transmission member for effecting changes in said rotational power transmitted through said rotatable coupling means to said drive roll so that actuation of said actuable transmission member is isolated from said rotatable coupling means;
- first regulating means for measuring tension in thread being wound on the bobbin and detecting variations therein, for automatically compensating for minor variations in said tension such as periodic fluctuations induced by operation of the traversing thread guide, and for outputting an indication of detected variations outside a predetermined range; and
- second regulating means, responsive to said indication output by said first regulating means, for actuating said variable speed transmission means actuable transmission member to vary the rotational speed of said drive roll so as to wind thread onto the bobbin at uniform tension throughout the winding process; wherein
- said apparatus winds conical cross-wound bobbins;
- said variable speed transmission means is disposed for driving a member connected to the drive roll and situated adjacent to the small diameter of such conical cross-wound bobbin; and
- said drive roll has at least two loose pulleys and a drive pulley arranged between said loose pulleys.
Priority Claims (1)
Number |
Date |
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Kind |
3422637 |
Jun 1984 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 743,230 filed June 7, 1985 now abandoned.
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Continuations (1)
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Number |
Date |
Country |
Parent |
743230 |
Jun 1985 |
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