CA1226857A - Wire or thread tension controlling dancer roller device - Google Patents

Wire or thread tension controlling dancer roller device

Info

Publication number
CA1226857A
CA1226857A CA000444224A CA444224A CA1226857A CA 1226857 A CA1226857 A CA 1226857A CA 000444224 A CA000444224 A CA 000444224A CA 444224 A CA444224 A CA 444224A CA 1226857 A CA1226857 A CA 1226857A
Authority
CA
Canada
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
Application number
CA000444224A
Other languages
French (fr)
Inventor
Katsuji Sakamoto
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Application granted granted Critical
Publication of CA1226857A publication Critical patent/CA1226857A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38Adjusting 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Ventilation (AREA)
  • Endoscopes (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Catching Or Destruction (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE
A dancer roller device for controlling the tension of a wire, thread or the like, wherein the tension is maintained constant at all times on the output side, independent of fluctuations in the tension on the inputs side. First and second sets of rollers are arranged parallel to one another, with the first set being fixed and the second set being mounted on a slider. The wire, thread or the like is laid over the two sets of rollers in a zig-zag manner, alternately passing around ones of the first and second rollers. A constant-tension spring urges the slider away from the first set of rollers. The moments of inertia of the first and second rollers, the masses of the rollers, the mass of the slider, the radii of the first and second rollers, and the number of passes of the wire, thread or the like between the first and second rollers are set such that the tension at the output side is always constant.

Description

1~2~t~S7 BACKGROUND OF THE INVENTION
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 recently developed optical fiber manufacturing apparatus, severe performance requirements are imposed, such as a requirement for a tension under 100 g with à maximum variation of I (US 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 ~22~35~
]- 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.

BRIEF DESCRIPTION OF THE DRAWINGS
.
Fig. 1 is an explanatory diagram of a conventional dancer roller device;

Fig. 2 depicts a modified portion of the device of Fig. l; and Fig. 3 is a plan view of the guide roller device use for explaining the principles of the device of the present invention.

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 rotatable supported, through respective bearings 12, 12' and 12", on a shaft 13 affixed to a rigid frame I Reference numerals 15 and 15' designate movable rollers which are rota-tab]y supported on a shaft lo through bearings 16 and 16'. A slider 18, slid able in the longitudinal direction of a shaft 19, has a slide resistance under several grams. Reference numeral 20 1 designates a spring which balances with the wire/thread tension, and 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 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 the slider 18 so as to control the motor 25 through the displaccn~ent 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 the electrical controller 26 and a large amount owe power is required for the motor 25.
accordingly, it is an object owe the invention to provide a dancer roller device in which these disadvantages are eliminated. More specifically it is an object of the invention to provide a dancer ruler 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 1 side and the -tension varies a-t the inlet side of the d{-?Vi go.
SUMMARY OF THE INVENTION
In accordance with the above and other objects of the invention, there is provided, according to the present invention, a predetermined relationship between the mass of the wire/thread moving elements, including the rollers at the movable side, and the moment of inertia of the rotating elements is maintained, so that variations in the tension at the inlet side are prevented from affecting the tension a-t the outlet side.

DISCRETION OF THE PREFERRED EMBODIMENTS
.. .. . _ . . _ _ In Fig. 3, which shows a dancer roller device of the invention, I designates a group of fixed guide rollers 1, 3, 5... , on -1- 1; II, a croup of movable guide rollers 2, 4, 6, ... n provided on a slider I 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 dips-placement detector; I a reel Lo a drive motor; and 16, a controller.
Assllming that 1'1 and To represent -the wire/thread tension a-t the Lotte clod 011l it Saudis reSpeC~:iV~`?Ly~

12ZÇ~357 .. - 5 -I at designates the acceleration at the it wire/thread position at the inlet side (the direction of the arrow is assumed as the positive direction), and no designates the number of wires/thread suspended between the guide roller groups I and II, the respective accelerations at , a, a , ,,, , no + 1 of the wire/thread running portions of the guide rollers 1, 2, 3,... null are expressed as follows:

at = O
a a = --a n a I I

Assume that JUG designates the moment of inertia of each of the guide rollers 1 null r designates the radius of each guide roller at its wire/thread running portion, and To, To, Tn~l 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:

12~57 .. -- 6 --IT T T J at 1 = J O :~: 1 = O

IT T T J a 1 = J a 3 3 To JUG r x r = JUG r r I:--Atonal Toll To G r r J G r Y r s n 1 Therefore, the total tension of the wire/threads suspended between the groups of guide rollers I and II is expressed as follows:

Toll no + . . . + To; + To + To + To = (To + To Al) + ( T + IT 1 + Jo T ) t ( T i IT n I n n ( 1 no Tn1 nil + To + To + To " . ...

1~26~357 .. -- 7 --1 In the case where the acceleration 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 To (constant) of the slider 8. Assuming that McKee designates the mass of each guide roller and my designates the mass of the slider 8, the right-hand side of the equation above becomes:

e 2 G S) no where the acceleration of the slider 8 is annul. The left-hand side may be arranged as follows:

nlTi + nl~Tn +1 + (nl~l)ATn + (Aetna -1 +

Jag n + AWAIT + 2~T3 + To = nlTi + 2 Jag (n~--1)JGa (nl-2)~Ga 3 r no no r n J a 2 J a 12 J awn no I
+ G+ G _ T + G
r no r no r nil Jag r ( Al (2nl+l) 1 rnl 1 = nlTi + L = T - L- my + my -122~3s7 ,. -- 8 --1 Accordingly:

To = e _ 1 ) my + my JUG null (2nl+1)]
no no r 6nl Since the wire/thread tension To at the outlet side is obtained by adding ~Tn+1 To to To ' the wire/thread tension To is expressed as follows:

- J G
n l + 1 n 1 + ' . + IT 2 = T +----+ Jag (no 1) Jag r no r no T + G 2 T i 2 2 a nil To (nl/2) my + my JUG r null (2n~+1) 1 = -- 2 a 2 L pa no no r on JUG null T rug no (no 1) (nl/2) my + my 1 lo + r2 2 acne + Lo 6nl - nl2 1 a T

To = e n - 9 - 12X~?35~
l 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 JUG of one guide roller, the number no 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 moment of inertia my Of one guide roller, and the mass my of the slider 8, are set such that the second term is zero, the equation becomes T

lo To no 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 To Of the slider 8 is constant is a necessary one, it is not- constant in the method utilizing the weight 28 as shown in Fig. 2. That is, not only it is necessary to employ a spring 20 as shown in Fig. l, but it is further required that the spring constant be substantially constant (the spring force does not depend on the amount of flexor). 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 1 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

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A dancer roller device for controlling the tension of a wire, thread or the like, comprising:
a plurality of first rollers, fixed in position and arranged in a line;
a slider extending lengthwise parallel to said line of said first rollers and slidable in a direction parallel to said line of said first rollers;
a plurality of second rollers fixed to said slider and arranged in a line parallel to said line of said first rollers, said wire, thread or the like being laid around said first and second rollers in a zig-zag manner, alternatively passing around ones of said first and second rollers and a coil spring having a constant curvature and having a substantially constant spring constant connected between said slider and a fixed point for urging said slider away from said first rollers, wherein moments of inertia, JG, of said first and second guide rollers, masses, mG' of said guide rollers, the mass of said slider mS' radii, r, of said first and second guide rollers and the number of passes nl of said wire, thread or the like between said first and second rollers being set such that tension in said wire, thread or the like at an output end from said first and second rollers is substantially constant and independent of variations in tension of said wire, thread or the like at an input end of said first and second rollers;
wherein the following relationship is maintained:
CA000444224A 1982-12-27 1983-12-23 Wire or thread tension controlling dancer roller device Expired CA1226857A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP230507/82 1982-12-27
JP57230507A JPS59119617A (en) 1982-12-27 1982-12-27 Dancer roller unit for wire tension control

Publications (1)

Publication Number Publication Date
CA1226857A true CA1226857A (en) 1987-09-15

Family

ID=16908839

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000444224A Expired CA1226857A (en) 1982-12-27 1983-12-23 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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
DE29723957U1 (en) * 1996-11-07 1999-07-29 Barmag-Spinnzwirn GmbH, 09116 Chemnitz Winding machine 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
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
DE3376067D1 (en) 1988-04-28
EP0114365A3 (en) 1986-04-16
FI834768A (en) 1984-06-28
AU561857B2 (en) 1987-05-21
EP0114365A2 (en) 1984-08-01
EP0114365B1 (en) 1988-03-23
AU2278783A (en) 1984-07-05
KR890003141B1 (en) 1989-08-23
KR840006955A (en) 1984-12-04
JPS59119617A (en) 1984-07-10
FI76767B (en) 1988-08-31
FI834768A0 (en) 1983-12-23
FI76767C (en) 1988-12-12
JPS6332704B2 (en) 1988-07-01
ATE33122T1 (en) 1988-04-15

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