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1. WO1981003089 - METHOD AND ARRANGEMENT ON EXTRACTING,REELING UP,PULLING IN,ETC.,OF A HEAVY CABLE OR SIMILAR

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[ EN ]

Claims
1. Method for extracting, reeling up, pulling-in etc of a heavy cable (7) or other equivalent long flexible object, for example a telephone or electricity cable, utilising a main frame (10) that can be set up on a vehicle (1, 2), the said main frame comprising a base unit made up of a number of beams and two bearing brackets (10b) projecting upwards from the long sides of the base unit, a drum (11) free to rotate on the bearing brackets on the main frame for the said cable or similar, and drive gear provided for the drum comprising a motor unit (13a) and a transmission component, for example in the form of a drive chain (14), drive belt or similar component, c h a r a c t e r i s e d in that a pulling device (17) is connected to a core of the cable or similar and to a pull-free mechanism (16) fixed to the main frame, that the pull-free mechanism is activated for a small longitudinal displacement of the cable or similar and thus causes the cable to be pulled free from a duct (6), attachment etc, that the pulling device is disconnected after the cable has been pulled free, and the said core (7a) is pulled up towards ahd anchored on the drum, that the motor unit is activated to turn the drum (11), and that the subsequent main part of the longitudinal displacement of the cable or similar is achieved by direct winding onto the drum.

2. Method according to claim 1, in which the cable or similar is laid in a duct arranged in the ground, the said duct opening into a cable pit (5), c h a r a c t e r i s e d in that the vehicle (1, 2) is set up adjacent to the cable pit, that connection by means of the pulling device is performed via the opening (5a) of the cable pit, that a curved cable track (8) is installed in the cable pit and that the cable or similar is guided via the track during the above-mentioned direct reeling on to the drum.

3. Method according to claim 1 or 2 , c h a r a c t e r i s e d in that the cable (7) or similar is guided during the direct reeling, via. guiding device (18) which, during direct reeling, distributes the cable or similar evenly on the drum.

4. Method according to claim 1, 2 or 3, c h a r a c t e r i s e d in that a soft and relatively wide plastic or cloth tape (17b) at the connection of the pulling device to the said core of the cable or similar is wrapped around the cable core so that on pulling free, the tape is tightened around the core and pulls the core along with it.

5. Arrangement for carrying out the method staed in claim 1 on extracting, reeling up and pulling in, etc., of a heavy cable (7) or other similar long flexible object, for example a telephone cable or electric power cable, and comprising a main frame (10) which can be set up on a vehicle (1, 2) and which has a base unit (10a) made up of a number of beams, and two bearing brackets (10b) projecting upwards from the long sides of the frame, a drum (11) for the said cable or similar supported so that it can rotate on the bearing brackets, and drive gear allocated to the drum, the said drive gear comprising a motor unit (13a) and a transmission component, for example in the form of a drive chain (14), drive belt or similar component, c h a r a c t e r i s e d in that there is fixed to the main frame a pull-free device (16) to which a core of the cable or similar can be coupled via a pulling device (17), that the pull-free mechanism is so arranged that it transfers a small longitudinal displacement motion to the cable or similar and thus pulls the cable or similar free in a duct (6) , suspension system etc, and that the main frame, motor unit and drum are so arranged that after the cable or similar has been pulled free and the core has been anchored to the drum, it is possible to reel the cable or similar directly on to the drum during the major part of the longitudinal of the cable or similar.

6. Arrangement according to claim 5, in which the base unit of the main frame includes a first subframe with longitudinal and lateral beams (10a1 , 10a2, 10a3, 10a4 and 10a5), c h a r a c t e r i s e d in that the pull-free mechanism (16) is in the form of at least one first hydraulic cylinder which is attached to one of the lateral beams ( 10a5) of the main frame.

7. Arrangement according to claim 6, c h a r a c t e r i s e d in that there is pivoted on the first subframe a second subframe (10c) which carries the said motor unit (13a), and that the second subframe is adjustable to different angular positions relative to the first subframe by means of at least one second hydraulic
. cylinder (15), by means of which the degree of tensioning of the said transmission component can be adjusted.

8. Arrangement according to claims 5, 6 and 7, c h a r a c t e ri s e d in that the main frame is fitted at its end facing away from the second subframe, with a spreader device (18) guiding the cable or similar, the said spreader device being so arranged that, on reeling up of the cable or similar on to the drum, the cable or similar is uniformly distributed on the drum.

9. Arrangement according to any of claims 5-9, c h a r a ct e r i s e d in that each bearing bracket comprises two beam members extending up from the longitudinal beams of the first sub frame and meeting at an angle, the said beam members carrying at their upper ends bearing devices for an axle belonging to the drum, and the central parts of which are connected together by further beam members (10b 3), a first beam member (10b2) of the said meeting beam members (10b 1 , 10b 2 ) forming a bearing attachment for the second hydraulic cylinder (15).

10. Arrangement according to any of claims 5-9, c h a r a ct e r i s e d in that the pull-free mechanism is in the form of a hook (16b) arranged to interact with each of a number of clamping locks (17a1 ) which are uniformly distributed along a draw wire 17a forming part of the periling devices.

11. Arrangement according to any of claims 5-10, c h a r a ct e r i s e d in that the first and second subframes in the base unit have a total length of about 5.0 m and a width of about 1.7 m and that the bearing brackets have a height of 1.5 m.