EP0114365B1 - Wire or thread tension controlling dancer roller device - Google Patents
Wire or thread tension controlling dancer roller device Download PDFInfo
- Publication number
- EP0114365B1 EP0114365B1 EP83112921A EP83112921A EP0114365B1 EP 0114365 B1 EP0114365 B1 EP 0114365B1 EP 83112921 A EP83112921 A EP 83112921A EP 83112921 A EP83112921 A EP 83112921A EP 0114365 B1 EP0114365 B1 EP 0114365B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- wire
- thread
- tension
- slider
- 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.)
- Expired
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
Definitions
- the present invention relates to a dancer roller for controlling the tension of wire, thread or the like.
- a dancer roller is widely used for maintaining constant the tension of the wire or thread.
- severe performance requirements are imposed, such as a requirement for a tension under 100 g with a maximum variation of ⁇ 5% ( ⁇ 5 g).
- Such severe performance requirements were not been imposed on earlier wire manufacturing equipment. Accordingly, it has been found necessary to improve the dancer roller to meet such requirements.
- a dancer roller has a wire/thread inlet side and a wire/thread outlet side, with the wire/thread tension being made constant at the outlet side. That is, a dancer roller is used for making constant the take-up tension at various positions, for example, for making constant the tension at the output side of an extruding station or for making constant the tension at a twisting point when it is used in a wire/thread twisting apparatus.
- FIG. 1 A prior art dancer roller device is shown in Fig. 1.
- reference numerals 11, 11' and 11" designate fixed rollers which are rotatably supported through respective bearings 12, 12' and 12", on a shaft 13 affixed to a rigid frame 14.
- Reference numerals 15 and 15' designate movable rollers which are rotatably supported on a shaft 17 through bearings 16 and 16'.
- Reference numeral 20 designates a spring which balances with the wire/thread tension
- 21 designates a rack which engages with a pinion 22 attached to a rotating shaft of an electrical displacement detector 23 which converts the displacement of the slider 18 into an electric signal.
- Reference numeral 24 designates a pay-off reel driven by an electric motor 25 which is controlled by an electrical controller 26, which is in turn actuated by a signal from the displacement detector 23.
- the spring 20 may be replaced by a weight 28 as shown in
- the speed of the reel 24 has to be tightly controlled to follow the variations in the coil feeding speed, and therefore, a complex and expensive device is required for the electrical controller 26 and a large amount of power is required for the motor 25.
- Fig. 3 which shows a dancer roller device of the invention
- I designates a group of fixed guide rollers 1, 3, 5 ..., n+1; II, a group of movable guide rollers 2, 4, 6, ... n provided on a slider 8; 9, a support shaft for the slider 8; 10, a coil spring; 11, a rack formed integrally with the slider 8; 12, a pinion; 13, a displacement detector; 14, a reel; 15, a drive motor; and 16, a controller.
- ⁇ designates the acceleration at the i-th wire/thread position at the inlet side (the direction of the arrow is assumed as the positive direction)
- n designates the number of wires/thread suspended between the guide roller groups I and II
- the respective accelerations ⁇ 1 , a 2 , ⁇ 3 , ..., n,+1 of the wire/thread running portions of the guide rollers 1, 2, 3, ...n 1 +1 are expressed as follows:
- the total tension of the wires/threads suspended between the guide roller groups I and II corresponds to a difference obtained by subtracting a value determined by the moment of inertia from the value of the reaction force T e (constant) of the slider 8.
- T e constant
- m G designates the mass of each guide roller
- m s designates the mass of the slider 8
- the lefthand side may be arranged as follows:
- the second term of the equation immediately above has positive and negative components with an offset relation. Therefore, if the respective constants, the moment of inertia J G of one guide roller, the number n, of the wires suspended between the guide roller groups I and II, the radius r of the guide roller at its wire/thread running portion, the mass of inertia m G of one guide roller, and the mass m s of the slider 8, are set such that the second term is zero, the equation becomes
- the wire/thread tension is not affected by the acceleration a at the inlet side.
- the condition that the reaction force T e of the slider 8 is constant is a necessary one, it is not constant in the method utilising the weight 28 as shown in Fig. 2. That is, not only it is necessary to employ a spring 20 as shown in Fig. 1, but it is further required that the spring constant be substantially constant (the spring force does not depend on the amount of flexure). This can be attained by using a coil spring having a constant curvature.
- the moment of inertia of the guide rollers, the mass of the movable guide rollers and the mass of the slider are balanced against the number of guide rollers and the radius of the guide rollers, and a substantially constant spring force is used as a force balancing with the tension so that wire/thread speed variations at the inlet side cannot contribute to variations in wire tension at the outlet side.
- a substantially constant spring force is used as a force balancing with the tension so that wire/thread speed variations at the inlet side cannot contribute to variations in wire tension at the outlet side.
- the invention is particularly adapted for use in the manufacture of optical fibers.
- the invention results in a control device having a reduced cost, made possible, in part, by a motor of smaller capacity than was necessitated by prior art approaches.
Abstract
Description
- The present invention relates to a dancer roller for controlling the tension of wire, thread or the like.
- In an apparatus for producing electric wire or in an apparatus handling wire or thread, a dancer roller is widely used for maintaining constant the tension of the wire or thread. Especially, in a recent developed optical fiber manufacturing apparatus, severe performance requirements are imposed, such as a requirement for a tension under 100 g with a maximum variation of ±5% (±5 g). Such severe performance requirements were not been imposed on earlier wire manufacturing equipment. Accordingly, it has been found necessary to improve the dancer roller to meet such requirements.
- Usually, a dancer roller has a wire/thread inlet side and a wire/thread outlet side, with the wire/thread tension being made constant at the outlet side. That is, a dancer roller is used for making constant the take-up tension at various positions, for example, for making constant the tension at the output side of an extruding station or for making constant the tension at a twisting point when it is used in a wire/thread twisting apparatus.
- It is known that variations of the wire/thread speed at the inlet side can be a factor affecting the wire/thread tension at the outlet side. For example, if slackening or pulling occurs in the winding of a bobbin at the inlet side, the wire tension will vary not only at the inlet side of the dancer roller, but also at the outlet side because, when the bobbin is used as the pay-off device, wire/thread slackening necessarily occurs since the wire/thread is wound in layers, one upon the other, so that the wire/thread speed varies even if the bobbin rotates at a constant speed.
- A prior art dancer roller device is shown in Fig. 1. In this figure, reference numerals 11, 11' and 11" designate fixed rollers which are rotatably supported through
respective bearings shaft 13 affixed to arigid frame 14.Reference numerals 15 and 15' designate movable rollers which are rotatably supported on ashaft 17 throughbearings 16 and 16'. Aslider 18, slidable in the longitudinal direction of ashaft 19, has a slide resistance under several grams.Reference numeral 20 designates a spring which balances with the wire/thread tension, and 21 designates a rack which engages with apinion 22 attached to a rotating shaft of anelectrical displacement detector 23 which converts the displacement of theslider 18 into an electric signal.Reference numeral 24 designates a pay-off reel driven by anelectric motor 25 which is controlled by anelectrical controller 26, which is in turn actuated by a signal from thedisplacement detector 23. Thespring 20 may be replaced by aweight 28 as shown in Fig. 2. - In the device described above, if the wire/thread feeding speed varies temporarily due to the slackening of the winding wire/thread, the tension varies at the inlet side of the
movable roller 15, and this variation is detected by theslider 18 so as to control themotor 25 through thedisplacement detector 23. - In this device, the speed of the
reel 24 has to be tightly controlled to follow the variations in the coil feeding speed, and therefore, a complex and expensive device is required for theelectrical controller 26 and a large amount of power is required for themotor 25. - Accordingly, it is an object of the invention to provide a dancer roller device in which no variations occur in the tension at the outlet side of the device, even if the wire/thread speed varies at the pay-off side and the tension varies at the inlet side of the device.
- This object is achieved by a dancer roller device having the features of claim 1.
- A preferred embodiment is disclosed in the depending
claim 2. -
- Fig. 1 is an explanatory diagram of a conventional dancer roller device;
- Fig. 2 depicts a modified portion of the device of Fig. 1; and
- Fig. 3 is a plan view of the guide roller device used for explaining the principles of the device of the present invention.
- In Fig. 3, which shows a dancer roller device of the invention, I designates a group of
fixed guide rollers 1, 3, 5 ..., n+1; II, a group ofmovable guide rollers slider 8; 9, a support shaft for theslider 8; 10, a coil spring; 11, a rack formed integrally with theslider 8; 12, a pinion; 13, a displacement detector; 14, a reel; 15, a drive motor; and 16, a controller. - Assuming that T; and To represent the wire/thread tension at the inlet and outlet sides respectively, α designates the acceleration at the i-th wire/thread position at the inlet side (the direction of the arrow is assumed as the positive direction), and n, designates the number of wires/thread suspended between the guide roller groups I and II, the respective accelerations α1, a2, α3, ..., n,+1 of the wire/thread running portions of the
guide rollers - Assume that JG designates the moment of inertia of each of the guide rollers 1~n1+ 1, r designates the radius of each guide roller at its wire/thread running portion, and T2, T3,... Tn+1 designate the tension of the respective wires/threads suspended between the guide roller groups I and II. Since the guide rollers are accelerated, the wire/thread tension is larger at the outlet side than at the inlet side with respect to each roller. Accordingly:
-
- In the case where the acceleration a is positive in the direction of the arrow and the
slider 8 is positively accelerated in the indicated direction C, the total tension of the wires/threads suspended between the guide roller groups I and II corresponds to a difference obtained by subtracting a value determined by the moment of inertia from the value of the reaction force Te (constant) of theslider 8. Assuming that mG designates the mass of each guide roller and ms designates the mass of theslider 8, the right-hand side of the equation above becomes:slider 8 is α/n1. The lefthand side may be arranged as follows: -
-
- The second term of the equation immediately above has positive and negative components with an offset relation. Therefore, if the respective constants, the moment of inertia JG of one guide roller, the number n, of the wires suspended between the guide roller groups I and II, the radius r of the guide roller at its wire/thread running portion, the mass of inertia mG of one guide roller, and the mass ms of the
slider 8, are set such that the second term is zero, the equation becomes - In this case, the wire/thread tension is not affected by the acceleration a at the inlet side. In this case, although the condition that the reaction force Te of the
slider 8 is constant is a necessary one, it is not constant in the method utilising theweight 28 as shown in Fig. 2. That is, not only it is necessary to employ aspring 20 as shown in Fig. 1, but it is further required that the spring constant be substantially constant (the spring force does not depend on the amount of flexure). This can be attained by using a coil spring having a constant curvature. - As will be apparent from the above description, the moment of inertia of the guide rollers, the mass of the movable guide rollers and the mass of the slider are balanced against the number of guide rollers and the radius of the guide rollers, and a substantially constant spring force is used as a force balancing with the tension so that wire/thread speed variations at the inlet side cannot contribute to variations in wire tension at the outlet side. Thus, it is not necessary to cause the bobbin speed to follow with a high response speed variations at the feeding side, and the tension at the outlet side can be maintained constant. Thus, the invention is particularly adapted for use in the manufacture of optical fibers. Moreover, the invention results in a control device having a reduced cost, made possible, in part, by a motor of smaller capacity than was necessitated by prior art approaches.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83112921T ATE33122T1 (en) | 1982-12-27 | 1983-12-21 | DANCER DEVICE FOR MAINTAINING TENSION IN A WIRE OR THREAD. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57230507A JPS59119617A (en) | 1982-12-27 | 1982-12-27 | Dancer roller unit for wire tension control |
JP230507/82 | 1982-12-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0114365A2 EP0114365A2 (en) | 1984-08-01 |
EP0114365A3 EP0114365A3 (en) | 1986-04-16 |
EP0114365B1 true EP0114365B1 (en) | 1988-03-23 |
Family
ID=16908839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83112921A Expired EP0114365B1 (en) | 1982-12-27 | 1983-12-21 | Wire or thread tension controlling dancer roller device |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0114365B1 (en) |
JP (1) | JPS59119617A (en) |
KR (1) | KR890003141B1 (en) |
AT (1) | ATE33122T1 (en) |
AU (1) | AU561857B2 (en) |
CA (1) | CA1226857A (en) |
DE (1) | DE3376067D1 (en) |
FI (1) | FI76767C (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE455599B (en) * | 1986-12-19 | 1988-07-25 | Kabmatik Ab | PROCEDURE AND DEVICE FOR CABLE FEEDING |
JP2816255B2 (en) * | 1991-03-19 | 1998-10-27 | 三菱電機株式会社 | Tension control device |
WO1998019952A1 (en) * | 1996-11-07 | 1998-05-14 | Barmag Spinnzwirn Gmbh | Method and device for winding a thread running at a constant speed |
FI112464B (en) * | 1998-04-17 | 2003-12-15 | T Drill Oy | Dispensing device with adjustable force for roll-packed materials |
CN103156277B (en) * | 2013-02-21 | 2015-07-15 | 南通大学 | Entwisting prevention wire filling system |
CN106064761A (en) * | 2016-06-15 | 2016-11-02 | 高武保 | A kind of high accuracy tension control mechanism being applicable on Optical Fiber Winding machine |
CN106115360A (en) * | 2016-06-15 | 2016-11-16 | 高武保 | A kind of automatic Dao Xian mechanism being applicable on Optical Fiber Winding machine |
JP7261398B2 (en) | 2018-12-24 | 2023-04-20 | 河政工業株式会社 | Optical fiber winding mechanism and optical path manufacturing method for optical fiber gyro |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2560204A (en) * | 1947-06-17 | 1951-07-10 | Artos Engineering Co | Automatic strand feed regulator |
US3501075A (en) * | 1967-11-28 | 1970-03-17 | Herbert D Scharf | Wire tension control device |
DE3108605A1 (en) * | 1981-03-06 | 1983-01-13 | Grote & Hartmann Gmbh & Co Kg, 5600 Wuppertal | STORAGE DEVICE FOR IN PARTICULAR INSULATED ELECTRIC LADDER WIRE |
FR2503114B1 (en) * | 1981-04-01 | 1986-02-07 | Pourtier Pere Fils Ets | UNWINDING DEVICE FOR FRAGILE WIRE IN A COIL |
-
1982
- 1982-12-27 JP JP57230507A patent/JPS59119617A/en active Granted
-
1983
- 1983-12-21 AT AT83112921T patent/ATE33122T1/en not_active IP Right Cessation
- 1983-12-21 DE DE8383112921T patent/DE3376067D1/en not_active Expired
- 1983-12-21 EP EP83112921A patent/EP0114365B1/en not_active Expired
- 1983-12-22 AU AU22787/83A patent/AU561857B2/en not_active Ceased
- 1983-12-23 FI FI834768A patent/FI76767C/en not_active IP Right Cessation
- 1983-12-23 CA CA000444224A patent/CA1226857A/en not_active Expired
- 1983-12-27 KR KR1019830006205A patent/KR890003141B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPS6332704B2 (en) | 1988-07-01 |
FI76767B (en) | 1988-08-31 |
AU561857B2 (en) | 1987-05-21 |
EP0114365A2 (en) | 1984-08-01 |
DE3376067D1 (en) | 1988-04-28 |
KR840006955A (en) | 1984-12-04 |
FI76767C (en) | 1988-12-12 |
FI834768A0 (en) | 1983-12-23 |
EP0114365A3 (en) | 1986-04-16 |
KR890003141B1 (en) | 1989-08-23 |
FI834768A (en) | 1984-06-28 |
JPS59119617A (en) | 1984-07-10 |
ATE33122T1 (en) | 1988-04-15 |
CA1226857A (en) | 1987-09-15 |
AU2278783A (en) | 1984-07-05 |
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