LINE GUIDING DEVICE FOR HANGING APPLICATIONS, PARTICULARLY AS A SERVICE LOOP FOR A DRILLING RIG

Abstract

A line routing device for guiding a plurality of lines, such as cables, hoses, or the like, particularly for hanging applications, such as supplying a vertically traveling power head of a drill. The line routing device has a flexible carrying strand and a plurality of guide bodies arranged one behind the other in the longitudinal direction of the carrying strand. According to the invention, adjacent guide bodies can be deflected spatially toward each other and each guide body has a central part having a center axis, which extends coaxially to the carrying strand, and an outer part having at least one circumferential element. The outer part delimits a receiving region, which is open in the axial direction, for the lines, radially to the outside.

Claims

1.-20. (canceled)

21. A line routing apparatus to guide at least one line for hanging applications, comprising: a flexible carrying strand which has tensile strength and which extends over a length of the line routing apparatus; a plurality of guide bodies arranged in succession in a longitudinal direction of the carrying strand; wherein adjacent guide bodies of the plurality of guide bodies are spatially deflectable relative to each other; wherein each guide body of the plurality of guide bodies has a central part having a central axis extending coaxially relative to the carrying strand and an outer part having at least one peripheral element, wherein the at least one peripheral element outwardly delimits a receiving region open in an axial direction for the at least one line and is held to the central part; wherein, in each guide body, the outer part is openable, wherein the at least one peripheral element is connected releasably, moveably and/or pivotably to the central part of the guide body; and wherein at least some of the guide bodies, at their central part, have a respective fixing device to fix the central part to the carrying strand.

22. The line routing apparatus according to claim 21, wherein the central part of each guide body has an axial through opening through which the carrying strand extends; and/or wherein the respective fixing device of the at least some of the guide bodies comprises a clamping and/or a locking device to fix the central part to the carrying strand in a force-locking relationship with an inside surface of an/the axial through opening of the central part through which the carrying strand extends.

23. The line routing apparatus according to claim 22, wherein the respective fixing device comprises at least one of: a clamping device in a form of a joint clamping shell having a hinge-like joint which connects two shell-shaped regions which are braceable against the carrying strand; a release clamp which at least partially reduces a free diameter of the axial through opening of the central part; or a latching clamp which at least partially reduces a free diameter of the axial through opening of the central part.

24. The line routing apparatus according to claim 21, wherein the carrying strand has carrying bodies which are fixedly mounted in the longitudinal direction of the carrying strand and to which the central part of each guide body is fixed in a positively locking relationship by the respective fixing device.

25. The line routing apparatus according to claim 21, wherein the outer part of each guide body has two peripheral elements which are respectively connected to the central part pivotably by a joint operable for pivoting at least one of the peripheral elements into an opened position to insert the at least one line into the receiving region or remove the at least one line from the receiving region.

26. The line routing apparatus according to claim 25, wherein the two peripheral elements are each in a shape of a half ring and/or are each in a form of identical parts.

27. The line routing apparatus according to claim 21, wherein at least some of the guide bodies each have an elastic buffer to damp radial shock on an outside of their peripheral element.

28. The line routing apparatus according to claim 27, wherein the elastic buffer of at least one of the guide bodies comprises at least one of: formed of an elastomer; a ring shape or a toroidal configuration; or surrounds the at least one peripheral element.

29. The line routing apparatus according to claim 27, wherein all of the guide bodies have an elastic buffer on the outside of their peripheral element; and wherein the elastic buffer of each guide body projects axially with respect to the at least one peripheral element and/or the buffer of each guide body is axially flush therewith so that buffers of the adjacent guide bodies limit a maximum angle of a spatial deflection of the guide bodies relative to each other as abutments.

30. The line routing apparatus according to claim 21, wherein the carrying strand has a first end and a second end; and wherein each of the first end and the second end has a connecting device to releasably fix the line routing apparatus.

31. The line routing apparatus according to claim 30, wherein the connecting device of each of the first end and the second end has at least two oppositely disposed holding arms which provide tensile strain relief of the at least one line.

32. The line routing apparatus according to claim 21, wherein the central part of each guide body has two axially projecting mutually opposite joint regions, wherein the joint regions are of conjugate configuration, wherein one joint region of one of the guide bodies is releasably introducible in the axial direction into a conjugate joint region of another guide body of the guide bodies and wherein the joint regions form a ball joint connection for spatial deflection of the adjacent guide bodies.

33. The line routing apparatus according to claim 21, wherein the plurality of guide bodies are fixed in axially mutually spaced relationship to the carrying strand.

34. The line routing apparatus according to claim 21, wherein the central part of each guide body includes two one-piece carrying arms which respectively have an inner clamping shell and a radial bar; wherein the inner clamping shells are connectable to form a through opening for the carrying strand; and wherein the radial bars have an outer end region to which the outer part is connected.

35. The line routing apparatus according to claim 21, wherein the central part of each guide body has an axial through opening through which the carrying strand extends; and wherein central part at the through opening has a clamping tooth arrangement extending transversely relative to the central axis to axial secure to the carrying strand and/or the carrying strand is in a form of a carrying cable of plastic and/or has a length of at least 5 m.

36. The line routing apparatus according to claim 21, wherein the line routing apparatus has a first vertically downwardly hanging length portion having a first end connected to a consumer to be supplied, a second vertically downwardly hanging length portion having a second end, and a loop connecting the first and second vertically downwardly hanging length portions and the carrying strand is extended beyond both ends.

37. The line routing apparatus according to claim 21, wherein the line routing apparatus is disposed on a drilling rig.

38. The line routing apparatus according to claim 37, wherein the line routing apparatus supplies power to a vertically travelling top drive of the drilling rig and wherein the line routing apparatus comprises two vertically downwardly hanging length portions connected by a loop.

39. A guide body of a line routing apparatus to guide at least one line for hanging applications, comprising: a central part having a central axis and an axial through opening through which a carrying strand is passable; an outer part having at least one peripheral element, wherein the peripheral element outwardly delimits a receiving region open in an axial direction for the at least one line and is held to the central part; wherein the peripheral element is connected pivotably openable to the central part and/or provided on the central part is a fixing device to fix the central part in position to the carrying strand; and wherein an outside of the peripheral element has an elastic buffer to damp radial shock.

40. A line routing apparatus to guide at least one line for hanging applications, comprising: a flexible carrying strand which has tensile strength and which extends over a length of the line routing apparatus; a plurality of guide bodies arranged in succession in a longitudinal direction of the carrying strand; wherein adjacent guide bodies of the plurality of guide bodies are spatially deflectable relative to each other; wherein each guide body of the plurality of guide bodies has a central part having a central axis extending coaxially relative to the carrying strand and an outer part having at least one peripheral element, wherein the peripheral element outwardly delimits a receiving region open in an axial direction for the at least one line and is held to the central part; and wherein at least some of the guide bodies have an elastic buffer to damp radial shock on an outside of their peripheral element.

41. The line routing apparatus according to claim 40, wherein the central part of each guide body has an axial through opening through which the carrying strand extends; and/or wherein the respective fixing device of the at least some of the guide bodies comprises a clamping and/or a locking device to fix the central part to the carrying strand in a force-locking relationship with an inside surface of an/the axial through opening of the central part through which the carrying strand extends.

42. The line routing apparatus according to claim 40, wherein the central part of at least some of the guide bodies has a fixing device for fixing the central part to the carrying strand, the fixing device comprising at least one of: a clamping device in a form of a joint clamping shell having a hinge-like joint which connects two shell-shaped regions which are braceable against the carrying strand; a release clamp which at least partially reduces a free diameter of the axial through opening of the central part; or a latching clamp which at least partially reduces a free diameter of the axial through opening of the central part.

43. The line routing apparatus according to claim 40, wherein the outer part of each guide body has two peripheral elements which are respectively connected to the central part pivotably by a joint operable for pivoting at least one of the peripheral elements into an opened position to insert the at least one line into the receiving region or remove the at least one line from the receiving region.

44. The line routing apparatus according to claim 43, wherein the two peripheral elements are each in a shape of a half ring and/or are each in a form of identical parts.

45. The line routing apparatus according to claim 40, wherein the elastic buffer of at least one of the guide bodies comprises at least one of: formed of an elastomer; a ring shape or a toroidal configuration; or surrounds the at least one peripheral element.

46. The line routing apparatus according to claim 45, wherein the elastic buffer of at least one of the guide bodies is in the form of an open ring with a gap to be opened for mounting on the outer part and to be closed by a fixing device.

47. The line routing apparatus according to claim 40, wherein all of the guide bodies have an elastic buffer on the outside of their peripheral element; and wherein the elastic buffers are arranged so that buffers of the adjacent guide bodies limit a maximum angle of a spatial deflection of the guide bodies relative to each other as abutments.

48. The line routing apparatus according to claim 47, wherein the elastic buffer of each guide body projects axially with respect to the at least one peripheral element and/or the elastic buffer of each guide body is axially flush therewith.

49. The line routing apparatus according to claim 40, wherein the line routing apparatus has a first vertically downwardly hanging length portion having a first end connected to a consumer to be supplied, a second vertically downwardly hanging length portion having a second end, and a loop connecting the first and second vertically downwardly hanging length portions and the carrying strand is extended beyond both ends.

50. The line routing apparatus according to claim 49, wherein the line routing apparatus is disposed on a drilling rig and supplies power to a vertically travelling top drive of the drilling rig.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Further details, features and advantages of the invention will be apparent from the detailed description hereinafter of preferred embodiments by way of example with reference to the accompanying drawings. In the drawings:

[0055] FIGS. 1A-1B show a first embodiment of a line routing device in a hanging arrangement for supplying a vertically moveable consumer as a side view (FIG. 1A) and a perspective enlarged view of the lower region or the direction-changing loop (FIG. 1B);

[0056] FIGS. 2A-2C show an axial section/longitudinal section (FIG. 2A) and a radial section/cross-section (FIG. 2B) and a perspective view (FIG. 2C) of a guide body of the line routing apparatus of FIGS. 1A-1B;

[0057] FIG. 3 shows a radial section/cross-section of a second embodiment of a guide body;

[0058] FIG. 4 shows as an example of application of the invention a drilling rig with a top drive which is supplied with a per se known service loop (state of the art) to be replaced by the line routing apparatus;

[0059] FIGS. 5A-5B show a preferred third embodiment of guide bodies in a modified configuration (FIG. 2A-2C);

[0060] FIG. 6 shows a further embodiment of a line routing apparatus wherein the carrying strand is in the nature of a link chain;

[0061] FIG. 7 shows a further embodiment of a line routing apparatus wherein the carrying strand has carrying bodies for positively locking fixing of the guide bodies;

[0062] FIG. 8 shows a diagrammatic cross-section through a connecting device for fixing an end of a carrying cable to a cable sleeve and holding arms for tensile strain relief of the lines; and

[0063] FIG. 9 shows a line with a meshed cable supporting grip for tensile stress relief and fixing to a connecting device, for example as shown in FIG. 8.

DETAILED DESCRIPTION

[0064] FIGS. 1A-1B show a first example of a line routing apparatus 10 according to the invention in a hanging arrangement with a first vertical longitudinal portion 12A which has a first end 12C, and a second vertical length portion 12B having a second end 12D. The first end 12C is connected to a machine component M which in this example travels vertically up and down, for example a top drive 3 (see FIG. 4) of a derrick. The second length portion 12B in turn is fixed with its end 12D to a frame structure or stationary machine part F. A loop 13 forms a direction-changing region which connects the two substantially vertically hanging length portions 12A, 12B.

[0065] The line routing apparatus 10 has a flexible carrying cable 11 of high-strength plastic fibres, for example of high-modulus polyethylene or high-modulus polyamide, which as the carrying strand carries the weight load of the line routing apparatus 10. For that purpose, the free end regions 11A, 11B, which project at both sides, of the carrying cable 11 is suitably fixed to the moveable machine part M and the stationary machine part F (diagrammatically shown in FIG. 1A). As a second essential component the line routing apparatus 10 has a plurality of annularly closed guide bodies 14 which occur in succession in the longitudinal direction of the carrying strand 11 (FIG. 1B). The guide bodies 14 are arranged in a row on the carrying cable 11 and are carried and held thereby. The carrying cable 11 thereby carries at least the entire weight of all guide bodies 14.

[0066] As FIG. 1B shows the loop 13 between the length portions 12A, 12B forms a relatively small radius, that is to say the length portions 12A, 12B can extend at a slight horizontal spacing relative to each other. The small radius is possible inter alia by virtue of the fact that adjacent guide bodies 14 can be strongly angled relative to each other. The guide bodies 14 are each moveable spatially relative to each other, as shown in FIG. 1B. The spacing between the length portions 12A, 12B however can also be markedly greater depending on the respective application and they do not have to hang down vertically. Depending on the respective application the line routing apparatus 10 can for example also extend similarly to a hanging bridge.

[0067] FIGS. 2A-2B show a first embodiment of a guide body 14 for the line routing apparatus 10. Each guide body 14 has inwardly a central part 15A having a central axis A and a through opening 16 coaxial therewith in order to pass the carrying strand 11 (FIG. 1A) therethrough and externally an outer part 15B having two peripheral elements 17 which are in the shape of a circular arc, here with an arc length of about 160-180, in order to hold the lines. Each peripheral element 17 radially outwardly delimits a receiving region L which is open in the axial direction for the lines (not shown).

[0068] The central part 15 includes a fixing device 18 for fixing the guide body 14 axially in position to the carrying cable 11. In FIGS. 2A-2B this is in the form of a screw clamping device 18 in the manner of a hinged clamping shell or cable clamp. For that purpose, the central part 15A has two one-piece carrying arms 20A, 20B which are integrally produced from plastic and which each have an inner clamping shell 21A, 21B. By virtue of their conjugate configuration the clamping shells 21A, 21B form at one side a hinge-like joint 24 (see FIG. 3) which pivotably connects the clamping shells 21A, 21B. At the opposite side the clamping shells 21A, 21B have screw openings for a clamping screw 25 to brace the U-shaped clamping shells 21A, 21B against each other. Alternatively, quick-release clamping devices or the like can also be considered. The clamping shells 21A, 21B further form centrally two approximately semi cylindrical inside surfaces of the through opening 16. By tightening of the clamping shells 21A, 21B the central part 15A, that is to say the guide body 14, is fixed to the carrying cable 11 for the inside surface of the through opening 16 is fixed in force-locking relationship to the carrying strand 11. A clamping tooth arrangement 28 extending transversely relative to the central axis A is provided at the inside surfaces of the two clamping shells 21A, 21B for giving a better axial securing action.

[0069] As FIG. 2B shows each carrying arm 20A, 20B includes integrally with the respective clamping shell 21A, 21B a radial bar 22A, 22B, to the outer end region of which the outer part 15B that is to say the two peripheral elements 17, are connected flexibly, here by a rotary hinge. In that way the two peripheral elements 17 are respectively connected to the one bar 22A of the central part 15A pivotably by way of an associated rotary joint 23, for example a hinge, pivotably between the closed position in FIG. 2B and an open position (not shown). In that way insertion or removal of lines into or from one of the receiving regions L is facilitated. The peripheral elements 17 are here identical parts and are in the form of a half ring, produced for example from plastic parts or metal sheet. The peripheral elements 17 form releasable eyes for the hinge 23, which similarly as in the case of pipe clamps, are rotatably mounted on a mounting pin or spindle on the one bar 22A. At the opposite end the peripheral elements 17 and the other bar 22B have screw openings passing therethrough for a securing screw 29 with a securing nut or the like. In that way the peripheral elements 17 are fixed to the other bar 22B in the closed position (FIG. 2B). The inside diameter of the receiving regions L defined in that way, measured radially between the peripheral elements 17, is in the region of approximately at least 150 mm to 300 mm, or greater. The receiving capacity is predetermined by suitable dimensioning of the peripheral elements 17 and optionally the bars 22A, 22B.

[0070] FIG. 2A further shows two central axially projecting hinge regions 26A, 26B of the central part 15A. They serve for a defined low-wear relative movement of adjacent guide bodies 14 without transverse shifts relative to each other out of the extended position in the length portions 12A, 12B into the complete angled position at the apex of the loop 13 (downward in FIG. 1B) and back. For that purpose, each central part 15A has two hinge regions 26A, 26B in opposite relationship at the ends, coaxially with the central axis 16. The opposite hinge regions 26A, 26B are of such a conjugate or paired configuration that the one hinge region 26A can be axially inserted releasably coaxially into the respective conjugate other hinge region 26B of an adjacent hinge body with the application of a slight force or no force, in particular without needing a tool. The hinge regions 26A, 26B can form a ball joint-like hinge connection for spatial deflection of adjacent guide bodies 14 about any two axes. For that purpose, the one hinge region 26A is in the form of a joint head 27A with the outer surface of a ball ring (see FIG. 2C) (part spherical) and the corresponding conjugate hinge region 26B is in the form of a joint socket 27B with an approximately hemispherical inside surface (see FIG. 2A).

[0071] FIGS. 2A-2C further show an annular elastic buffer 19 comprising an elastomer, which surrounds the peripheral elements 17 substantially over the full periphery. The buffer can be rounded in the transition between the axial end and the peripheral surface and serves on the one hand as an angular abutment for limiting the minimum direction-changing radius of the loop 13 (downward in FIG. 1B) and on the other hand for damping radial shocks, for example when impacting against the installation/machine or in transport.

[0072] Each buffer 19 is in the form of an open ring with a gap for mounting on the outer part and is closed with the securing screw 29. In the example shown here the buffer 19 does not project axially beyond the peripheral elements 17 but is axially flush with the axial end of the peripheral elements 17, but a projecting configuration is also possible. For axial securing purposes the buffers 19 engage radially into a peripheral holding groove or receiving means at the outside of the peripheral elements 17. It is however also possible to fit peripherally closed buffers 19 (without a gap) in place with a tight fit like a wheel tyre, for example to additionally secure the peripheral elements 17. The elastic shock-absorbing buffers 19 can be solid bodies or, depending on the structural size involved for saving weight, they can be in the form of hollow bodies.

[0073] FIG. 3 shows a second embodiment of a guide body 34 for a line routing apparatus 10. The guide body 34 differs from that shown in FIGS. 2A-2B in particular in that it does not have any pronounced joint regions 26A, 26B. The guide body 34 is intended for mounting in a row on the carrying cable 11 with an axial spacing between adjacent guide bodies 34. In the guide body 34 shown in FIG. 3 there are mutually opposite trumpet-shaped mirror image-symmetrical mouth regions 36. The mouth regions 36 enlarge radially outwardly or widen in order to reduce frictional wear with the carrying cable 11 when assuming an angled position. Thus, if required it is also possible to achieve a still smaller radius for the loop 13 (FIG. 1B). Otherwise the same references in FIG. 3 denote the same parts as in FIGS. 2A-2C. A greater enlargement of the through opening 16 however can also be provided in FIGS. 2A-2C.

[0074] FIG. 4 shows an example of use for the line routing apparatus 10 shown in FIGS. 1-3 in a derrick 1. In this case the line routing apparatus 10 can serve as a replacement for the conventional service loop 6 which supplies the top drive 3.

[0075] FIGS. 5A-5B show a variant of FIGS. 2A-2C with guide bodies 54. One difference is that the carrying arms have material thickenings 52C, 52D for protecting the lines at both bars 52A, 52B in the region around the clamping screw 25. In addition, the bar 52A at which the rotary joint 53 is provided for pivoting the peripheral elements 57 open forms further material thickenings 52E, 52F for protecting the lines in relation to the rotary joints 53 and for mechanically reinforcing the joints 53. In FIGS. 5A-5B hinge pins are provided at the peripheral elements 57 and are mounted pivotably to the bar 52A. The guide bodies are identical to FIGS. 2A-2C in other essential features. As in FIGS. 2A-2C in particular the central part and also the outer part can be made at least predominantly from plastic injection mouldings.

[0076] FIG. 6 is a perspective view of a short length portion of an alternative embodiment in which the carrying strand 11 (see FIG. 1A) is not in the form of a carrying cable but is in the form of a link chain. For that purpose the individual guide bodies 64 respectively have in axially opposite relationship two holding eyes 63 with which they can be linked in the longitudinal direction by means of intermediate members 62, for example of the structure of typical chain links of a round link chain, and can be deflected relative to each other. The central parts 65A in FIG. 6 are thus load-bearing integral component parts of the chain-like carrying strand. In this case each central part 65A of each guide body 64 also has two diametrally opposite carrying arms 60A, 60B to which the outer part 65B is fixed. A further difference in relation to FIGS. 2A-2C and FIGS. 5A-5B is that the outer part 65B here has two fixed, non-releasable peripheral elements 67A in the shape of a circular arc, which are produced for example in one piece with the carrying arms 60A, 60B. Two releasable peripheral elements 67B in the shape of a circular arc are removably fixed to the non-releasable peripheral elements 67A of the outer part 65B, for example by a screw connection, as is shown in an exploded view in FIG. 6 in relation to the upper guide body 64.

[0077] FIG. 7 is a partial perspective view of a longitudinal portion of a further alternative embodiment in which the carrying strand is in the form of a carrying cable 71. Block-like carrying bodies 72 are stationarily fitted to the carrying cable 71 at regular intervals. The carrying bodies 72 can be pressed in position and/or fixed to the carrying cable in the longitudinal direction by adhesive. That structure permis a positively locking connection for the central parts 75A, for securing in position on the carrying cable 71. For that purpose the central parts 75A in FIG. 7 each have receiving means 77 which are respectively formed on the carrying arms 76A, 76B and which are suitably designed for positively locking engagement with the carrying bodies 72. The receiving means 77 are fitted similarly to holding means in positively locking relationship mon the carrying bodies 72 and are fixedly connected together, for example by screwing. The outer parts (not shown in FIG. 7 for the sake of simplicity of the drawing) can in this case be of a structure corresponding to FIG. 5A-5B or also FIG. 6. In the example in FIG. 7 the central parts 75A, in particular the carrying arms 76A, 76B and the receiving means, can also be produced in one piece from plastic in the form of injection mouldings.

[0078] FIGS. 8 and 9 show a connecting device 80, with which the end regions 11A, 11B of the carrying cable 11 (FIG. 1) can be releasably fixed to the connecting points of the installation. The connecting device 80 in FIG. 8 includes a main body, for example produced by cutting machine in the form of a metal component, with a cable sleeve in the lower region, which includes a coaxial receiving means 83 in which the respective end region 11A, 11B of the carrying cable 11 (FIG. 1) is received and fixed in tension-resistant fashion by pressing and/or casting with a casting material (adhesive joint). Provided at the opposite end is a threaded projection 84 with a male or female thread, to which preferably a shackle, a load eye, a load hook or the like (not shown) is screwed to permit easy assembly/disassembly. In addition the connecting device 80 includes at least two oppositely disposed radial holding arms 85A, 85B having transverse bores 86 for fixing a respective individual line 93 directly to the connecting device 80 and thus also to the carrying cable 11. By virtue of the bores 86 meshed cable supporting grips 90 (FIG. 9) can be suspended in tensile strain-relieved relationship with a loop/thimble 92 by means of shackles on the holding arms 85A, 85B.

LIST OF REFERENCES

FIGS. 1A-1B

[0079] 10 line routing apparatus [0080] 11 carrying cable (carrying strand) [0081] 11A, 11B end region (carrying strand) [0082] 12A, 12B hanging length portion [0083] 12C, 12D ends (line routing apparatus) [0084] 13 loop [0085] 14 guide body [0086] M moveable machine part [0087] F stationary machine part

FIGS. 2A-2B

[0088] 14 guide body [0089] 15A central part (of the guide body) [0090] 15B outer part (of the guide body) [0091] 16 through opening [0092] 17 peripheral element [0093] 18 fixing device [0094] 19 buffer [0095] 20A, 20B carrying arm (on the central part) [0096] 21A, 21B clamping shell (on the central part) [0097] 22A, 22B bar (on the central part) [0098] 23 rotary joint (between peripheral element and carrying arm [0099] 24 hinge joint (on clamping shells) [0100] 25 clamping screw [0101] 26A, 26B hinge regions (on the central part 15A) [0102] 27A joint head [0103] 27B joint socket [0104] 28 clamping tooth arrangement [0105] 29 securing screw [0106] A central axis [0107] L receiving region

FIG. 3

[0108] 34 guide body [0109] 15A central part (of the guide body) [0110] 15B outer part (of the guide body) [0111] 17 peripheral element [0112] 19 buffer [0113] 21A, 21B clamping shell (on the central part) [0114] 36 mouth region (on the central part 15A)
FIG. 4 (state of the art) [0115] 1 derrick [0116] 2 lifting apparatus [0117] 3 top drive [0118] 5 lines [0119] 6 service loop (state of the art)

FIGS. 5A-5B

[0120] 19 buffer [0121] 25 clamping screw [0122] 29 securing screw [0123] 52A, 52B bar (on the central part) [0124] 52C, 52D;52E, 52F (material thickening) [0125] 53 rotary joint (between peripheral element and carrying arm) [0126] 54 guide body [0127] 57 peripheral element

FIG. 6

[0128] 60A, 60B carrying arm (on the central part) [0129] 62 intermediate member [0130] 63 holding eye [0131] 64 guide body [0132] 65A central part (of the guide body) [0133] 65B outer part (of the guide body) [0134] 66 through opening [0135] 67A peripheral element (fixed) [0136] 67B peripheral element (releasable) [0137] 69 buffer

FIG. 7

[0138] 71 carrying cable [0139] 72 carrying body [0140] 75A central parts [0141] 76A, 76B carrying arm (on the central part) [0142] 77 receiving means

FIG. 8

[0143] 80 connecting device [0144] 82 cable sleeve [0145] 83 receiving means [0146] 84 threaded projection [0147] 85A, 85B holding arms [0148] 86 transverse bores

FIG. 9

[0149] 90 meshed cable supporting grips [0150] 92 loop/thimble [0151] 93 line (cable)