EP0275852A1 - Verfahren und Vorrichtung zum Zuführen eines Kabels - Google Patents

Verfahren und Vorrichtung zum Zuführen eines Kabels Download PDF

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Publication number
EP0275852A1
EP0275852A1 EP19870850387 EP87850387A EP0275852A1 EP 0275852 A1 EP0275852 A1 EP 0275852A1 EP 19870850387 EP19870850387 EP 19870850387 EP 87850387 A EP87850387 A EP 87850387A EP 0275852 A1 EP0275852 A1 EP 0275852A1
Authority
EP
European Patent Office
Prior art keywords
wheels
cable
stand
tension
take
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.)
Granted
Application number
EP19870850387
Other languages
English (en)
French (fr)
Other versions
EP0275852B1 (de
Inventor
Ola Johnsson
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.)
Mindset Holding SA
Original Assignee
Nokia Maillefer Holdings SA
KABMATIK AB
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 Nokia Maillefer Holdings SA, KABMATIK AB filed Critical Nokia Maillefer Holdings SA
Publication of EP0275852A1 publication Critical patent/EP0275852A1/de
Application granted granted Critical
Publication of EP0275852B1 publication Critical patent/EP0275852B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • 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
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • B65H59/34—Surfaces movable automatically to compensate for variation in tension

Definitions

  • the present invention relates to a method and a device for controlling the tension in a cable, band, line or the like when storing it in a plurality of loops over a first, substantially stationary set of wheels and a second movable set of wheels during con­tinuous running of the cable or the like and exchange of drums in the unwind stand or the take-up stand, said second set of wheels being movable along a beam system by means of a drive unit.
  • Cable stores for storing a cable or the like are previously known and allow continuous production of a cable, also while the drums are exchanged in the unwind stand and the take-up stand.
  • a commonly used cable store comprises a stationary and a mov­able set of wheels. The cable runs in loops between the two sets of wheels, and at least one cable store is provided between the unwind stand and the take-­up stand for either paying out or taking up the cable when the drum of the unwind stand or the take-up stand is exchanged and the other drum is driven at a constant speed.
  • the store is thus supplied with cable and when the drum of the unwind stand is exchanged, the store is paying out cable.
  • the movable set of wheels is located adjacent the stationary set of wheels when the store is empty, and the distance between the two sets of wheels is maximal when the store is full.
  • the tension in each run of the cable is normally controlled by applying a predetermined constant tensile force to the movable set of wheels by means of a chain assembly connected to an electric motor, the tensile force applied being adjusted by means of a potentio­meter.
  • the tensile force applied to the movable set of wheels cannot be made less than 0 (i.e. the motor assists in contracting the store), since there are no means provided for checking the tension in the cable.
  • This must be effected by means of the tensile forces in the cable runs.
  • Compensators for controlling the tension in ca­bles and the like in connection with cable winding are previously known from U.S. patent specifications 2,834,556, 2,978,196 and 2,981,491.
  • the compensators are mounted in association with the winding machines and comprise a sensing mechanism consisting of a lever (dancer) biased by a tension spring.
  • One end of the lever carries guide pulleys for only one cable loop, and the lever is mounted on a shaft connected to a sensor for sensing the angular movement of the lever.
  • the signals from the sensor control either the unwind­ing speed of the cable or the take-up speed of the cable.
  • One object of the present invention is to provide a method and a device for controlling the tension in a cable in a cable store of optional size during continuous winding and exchange of drums.
  • a further object is to provide a space-saving sensing mechanism which is integrated with the cable store and by means of which the tension in one or more cable runs can be sensed and controlled, and by means of which a quick response can be obtained upon a change in tension.
  • Yet another object is to provide a reliable sens­ing mechanism which has few components, is capable of exerting a constant adjustable pressure, is relative­ ly inexpensive to manufacture and can be accommodated in the cable store.
  • At least one of the wheels of the first set of wheels is displaceable towards or away from the second set of wheels under the influence of a change in the balance between the tension in the cable and a constant pressure produced by an ope­rating mechanism connected to the displaceable wheel or wheels of said first set of wheels, said constant pressure being directed away from the second set of wheels, and in that a sensor sensing the displacement of said displaceable wheel or wheels is arranged to supply a correcting signal corresponding to said dis­placement, to the drive unit for controlling the tension in the cable by moving the second set of wheels to­wards or away from the first set of wheels, and/or a correcting signal to the unwind stand or the take-up stand for controlling the tension in the cable or the like by correcting the speed of rotation of the unwind stand or the take-up stand.
  • Fig. 1 is a side view schematically showing an unwind stand and a take-­up stand, as well as a device for storing a cable according to the invention, with a preferred drive unit for the movable set of wheels
  • Fig. 2 is a side view on a larger scale showing an alternative device for storing the cable according to the invention, with the operating mechanism completely enclosed in the cable store
  • Fig. 3 is also a side view showing a further alternative device for storing a cable ac­cording to the invention where the store is vertically oriented.
  • the device for storing a cable according to the invention is generally designated 1 and is shown to­gether with an unwind stand 2 and a take-up stand 3 as schematically illustrated in Fig. 1.
  • the unwind stand 2 and the take-up stand 3 each have a drum for the cable, band, line or the like 4, and a tachometer 5, 6.
  • the tachometers 5, 6 may be mounted on guide rollers which are connected to the unwind stand and the take-up stand, respectively, but which, for greater clarity of Fig. 1, are shown integrated in the unwind stand and the take-up stand.
  • the cable 4 is unwound from the unwind stand 2 at a substantially constant speed in the direction of the arrow, runs through the store 1 where a variable length of the cable is taken up, and is wound at a substantially constant speed onto the drum of the take-up stand.
  • two or more stores 1 may be arranged successively after each other between the unwind stand and the take-up stand.
  • the device 1 for storing the cable 4 comprises a frame 7 with a beam system 8 consisting of one or two pairs of parallel beams which are horizontally oriented in Figs. 1 and 2, and vertically oriented in Fig. 3. Further, the device 1 has a first, sub­stantially stationary set of wheels 9 and a second movable set of wheels 10. Each set of wheels 9, 10 consists of a plurality of rotatably mounted wheels or guide rollers over which the cable 4 passes in a plurality of loops between the two sets of wheels 9, 10 in a conventional manner, as appears from Figs. 1-3.
  • the wheels of the second set 10 are preferably mounted on a common shaft supported by a carriage 11 which is movable along the beam system 8 towards and away from the first set of wheels 9 by means of a drive unit 12 in a manner which will be described in more detail below.
  • the wheels of the first set 9 may all be mounted on a common shaft connected to an operating mechanism 13. Alternatively, only one, two or an op­tional number of wheels (less than the total number of wheels) are connected to the operating mechanism by a common shaft while the other wheels of the first set of wheels, as required, are fixed to the beam system by another, common shaft.
  • a chain assembly comprising one, two or more parallel, iden­tically designed and identically mounted, endless chains 14 which are movable between a pair of sprockets 15, 16.
  • the sprocket or sprockets 16 are connected by a gear 17 to an electric motor 18 or like means.
  • the components of the drive unit 12 are only shown in Figs. 1 and 2, but a similar drive unit is preferivelyably used in the alternative embodiment of the device according to the invention illustrated in Fig. 3.
  • the second set of wheels 10 is fixed to the chain assembly and moved by the motor 18 via the chain as­sembly and the gear 17, the carriage 11 sliding along the beam system 8 towards or away from the first set of wheels 9 in dependence upon the direction and the speed of rotation of the motor.
  • the operating mechanism 13 which is connected to and capable of displac­ing one, two or more wheels is the first set of wheels 9, comprises an arm 22, a so-called dancer, at the free end of which the displaceable wheels are rotatably mounted.
  • the other end of the arm is pivotally mounted in a bracket 19 fixed to the frame 7.
  • a pneumatic cylinder 20 Spaced from the bracket in the direction of the second set of wheels 10, a pneumatic cylinder 20 is pivotally mounted in the frame.
  • the piston rod 21 of the cylinder is pivotally mounted in the arm 22, preferably midway between the bearing of the arm in the bracket and the bearing of the wheels in the arm.
  • a control device (not shown) of known design for setting and maintaining a selected pressure in the cylinder.
  • the control device comprises an instantaneous evacuation port.
  • This adjustable pressure produces a force which is directed away from the second set of wheels 10 and directly proportional to the tensile force in the cable runs and is used for setting the desired tensile force in the cable as described below.
  • a sensor 23 At the end of the arm 22 which is pivotally mounted in the bracket 19, there is pro­vided a sensor 23 which is connected to the arm in such a manner that it will sense the angular movements of the arm. The position of the displaceable wheel or wheels of the first set of wheels 9 can thus be instantaneously sensed by means of signals from the sensor.
  • the alternative embodiment of the invention according to Fig. 2 shows only those components which differ from the components used in the embodiment according to the Fig. 1, and are required for describing this alternative embodiment.
  • Fig. 2 also shows the incoming and outgoing ends to the right in the Figure to indicate that the unwind stand 2 and the take-up stand 3 can also be located on the same side of the cable-storing device 1. In this case, too, it is possible to use two or more cable stores.
  • the essential difference of the embodiments of Figs. 1 and 2 lies in the design of the operating mechanisms.
  • the operating mechanism 13 is completely enclosed in the cable store.
  • the operating mechanism comprises a pneumatic cylinder 20 with a control device.
  • These components are similar to the corresponding components used in the embodiment according to Fig. 1.
  • One end of the cylinder 20 is fixed to bracket means 24 in turn fixed to the frame 7 and/or the beam system 8, e.g. by welds or bolts (not shown).
  • the fixing point of the cylinder in the bracket means is located on a straight line intersecting the centre axes of the two sets of wheels 9, 10.
  • the piston rod 21 of the cylinder is connected in a suitable manner, e.g.
  • the sensor may also, for example, consist of a load cell connected to the wheel or wheels for sensing very small displacements.
  • the position of the displaceable wheel or wheels of the first set 9 can therefore be instantaneously sensed by means of the signals from the sensor.
  • the non-displaceable wheels of the first set of wheels 9 are mounted on a common shaft, which by the intermediary of bracket means 25, is fixed to the frame 7 and/or the beam system 8, as in the embodiment according to Fig. 1.
  • Fig. 3 there is shown a further embodiment of the invention where the cable store is vertically oriented, i.e. the movable set of wheels 10 moves in a vertical plane instead of a horizontal plane as in the embodiments according to Figs. 1 and 2.
  • the design of the frame 7 thus slightly differs from the design used in the previously described embodiments of the invention, especially in respect of the attach­ment to the floor, but since the frame per se is no part of the inventive object, this circumstance is here disregarded.
  • the vertical orientation of the cable store necessitates a pair of additional guide pulleys 26, 27 provided at the lower end of the cable store (at the end of the store where the first set of wheels 9 is located), the incoming end of the cable passing over the guide pulley 26 and the outgoing end of the cable passing over the guide pulley 27.
  • the control device of the pneumatic cylinder 20 is compensated, for instance, for the weight of the wheel set 9, the arm 22 and the piston rod 21.
  • the basic speed is zero, which means that the second set of wheels 10 is sta­tionary and that the speed and the tension of the cable in the store are substantially constant.
  • the end of the cable entering the cable store is decelerated, i.e. V in ⁇ V out , the second set of wheels 10 being moved to the right in the Figure at a speed according to the above equation, and the relative distance between the wheel sets 9, 11 decreases, i.e. the cable store is being emptied.
  • This control of the movements of the second set of wheels 10 is however not sufficiently accurate or rapid at the required speed (preferably up to 400 m/­min.) and for the tensile tolerance of the cable, especially in the cable store.
  • the tension of the cable in the cable store is instantaneously sensed. The tension in the cable is controlled for maintaining a predetermined value by correcting the movement of the second set of wheels.
  • the pneumatic cylinder 20 of the operating mecha­nism 13 can be set for maintaining a constant pressure which is transmitted as a tensile force to the cable loop or loops in the store running over the displace­able wheel or wheels of the first set 9, whereby the desired tension in the cable 4 is set.
  • the arm 22 of the operating mechanism is pivoted from its neutral (vertical) position to the right in the Figure upon a decrease of the tension in the cable, or to the left upon an increase of the tension.
  • the sensor 23 then produces a signal corre­sponding to the angular movement of the arm from its neutral position and, hence, to the change of tension in the cable.
  • the signal is supplied to the control circuit of the electric motor 18 which, via the drive unit 12, moves the second set of wheels to the left in the Figure upon a decrease of the tension in the cable or to the right upon an increase of the tension.
  • the arm 22 is pivoted downwards in the Figure upon a decrease of the tension in the cable or upwards upon an increase of the tension. Otherwise, the function is identical with that described above.
  • the movement of the piston rod 21 is sensed by the sensor 23, and the signal generated is supplied to the control circuit of the motor as described above.
  • V in differs from V out , but also in these cases the tension in the cable is ob­tained as a function of the basic speed of the second set of wheels and of the pressure in the cylinder, it being possible to maintain the tension in the cable constant also when filling or emptying the cable store by correcting the basic speed of the second set of wheels as described above.
  • One characteristic feature of the present invention is that the movement of the displaceable wheel or wheels in the first set of wheels is used for correct­ing the tension in the cable.
  • the correcting signal can be used, to the same end, for correcting the speed of rotation of the unwind stand and the take-up stand, especially if they are located adjacent the cable store.
  • control device is integrated with the cable store, which simplifies the path of travel of the cable.
EP19870850387 1986-12-19 1987-12-14 Verfahren und Vorrichtung zum Zuführen eines Kabels Expired EP0275852B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8605494 1986-12-19
SE8605494A SE455599B (sv) 1986-12-19 1986-12-19 Forfarande och anordning vid matning av kabel

Publications (2)

Publication Number Publication Date
EP0275852A1 true EP0275852A1 (de) 1988-07-27
EP0275852B1 EP0275852B1 (de) 1991-04-03

Family

ID=20366706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870850387 Expired EP0275852B1 (de) 1986-12-19 1987-12-14 Verfahren und Vorrichtung zum Zuführen eines Kabels

Country Status (3)

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EP (1) EP0275852B1 (de)
DE (1) DE3769120D1 (de)
SE (1) SE455599B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476880A2 (de) * 1990-09-21 1992-03-25 General Atomics Fiberbündler
US6152396A (en) * 1998-04-17 2000-11-28 T-Drill Oy Variable-force discharge mechanism for materials loaded on a reel
CN102390764A (zh) * 2011-08-15 2012-03-28 宁波长壁流体动力科技有限公司 一种金属线编织机的放线机构
US11691844B2 (en) 2021-01-14 2023-07-04 General Electric Company Cable tensioning systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934338A (en) * 1956-10-25 1960-04-26 Package Machinery Co Web feeding device
US2981491A (en) * 1957-12-13 1961-04-25 Gen Electric Wire dispensing apparatus
FR2024772A1 (de) * 1968-09-13 1970-09-04 Kleinewefers Plas3Icmasc
US3811637A (en) * 1972-08-24 1974-05-21 Faustel Inc Pneumatic tension control system
EP0114365A2 (de) * 1982-12-27 1984-08-01 Sumitomo Electric Industries Limited Tänzerrollenvorrichtung zur Aufrechterhaltung der Zugspannung in einem Draht oder Faden

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934338A (en) * 1956-10-25 1960-04-26 Package Machinery Co Web feeding device
US2981491A (en) * 1957-12-13 1961-04-25 Gen Electric Wire dispensing apparatus
FR2024772A1 (de) * 1968-09-13 1970-09-04 Kleinewefers Plas3Icmasc
US3811637A (en) * 1972-08-24 1974-05-21 Faustel Inc Pneumatic tension control system
EP0114365A2 (de) * 1982-12-27 1984-08-01 Sumitomo Electric Industries Limited Tänzerrollenvorrichtung zur Aufrechterhaltung der Zugspannung in einem Draht oder Faden

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476880A2 (de) * 1990-09-21 1992-03-25 General Atomics Fiberbündler
EP0476880A3 (en) * 1990-09-21 1992-07-08 General Atomics Fiber combiner
US6152396A (en) * 1998-04-17 2000-11-28 T-Drill Oy Variable-force discharge mechanism for materials loaded on a reel
CN102390764A (zh) * 2011-08-15 2012-03-28 宁波长壁流体动力科技有限公司 一种金属线编织机的放线机构
US11691844B2 (en) 2021-01-14 2023-07-04 General Electric Company Cable tensioning systems

Also Published As

Publication number Publication date
SE455599B (sv) 1988-07-25
SE8605494L (de) 1988-06-20
SE8605494D0 (sv) 1986-12-19
EP0275852B1 (de) 1991-04-03
DE3769120D1 (de) 1991-05-08

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