TELESCOPIC JIB WITH SWING-OUT MAST

Abstract

A telescopic jib includes a main box, at least one inner box and at least one swing-out mast. The mast is arranged on the inner box such that the inner box is able to be pushed into the main box together with the mast in a swung-in or folded-in position to thereby provide a telescopic jib that more easily provides an increased load-bearing capacity. In a particular configuration such a telescopic jib is disposed on a vehicle crane having wheels, axles, a lower carriage and a superstructure, with the telescopic jib mounted to the superstructure.

Claims

1. A telescoping jib comprising: a basic box; at least one inner box; and at least one mast that is configured to be folded out into a folded-out position and to be folded in into a folded-in position; wherein the mast is arranged on the inner box such that the inner box can be pushed into the basic box together with the mast in the folded-in position.

2. The telescoping jib as claimed in claim 1, wherein a plurality of inner boxes are arranged one inside another and together in the basic box, and wherein the mast is arranged on the innermost inner box and the innermost inner box together with the mast is able to be pushed into the second-innermost inner box in the folded-in position.

3. The telescoping jib as claimed in claim 1, wherein the at least one mast comprises a first mast and at least one further mast, and wherein the inner box comprises the at least one further mast which is articulated on the inner box in addition to the first mast as seen in a longitudinal direction of the inner box.

4. The telescoping jib as claimed in claim 3, wherein the first mast and the at least one further mast each form an angle of spread in the folded-out position.

5. The telescoping jib as claimed in claim 1, wherein the at least one inner box comprises an innermost box and at least one further inner box and wherein the at least one mast comprises a first mast arranged on the innermost box and an additional mast arranged on the at least one further inner box.

6. The telescoping jib as claimed in claim 5, wherein the additional mast arranged on the further inner box is operable for erection of the first mast on the innermost inner box.

7. The telescoping jib as claimed in claim 1, wherein the mast is C-shaped and partially surrounds the at least one inner box.

8. The telescoping jib as claimed in claim 1, wherein the at least one mast comprises a plurality of masts, and wherein between the masts in the folded-out position a connector is arranged and is fastened respectively to the masts, and wherein the connector comprises a cable or a strut.

9. The telescoping jib as claimed in claim 1, wherein one or each mast of the at least one mast comprises a pulley.

10. The telescoping jib as claimed in claim 1, wherein one or each mast of the at least one mast can be guyed in the folded-out position with respect to a telescoping jib head by a connector.

11. The telescoping jib as claimed in claim 10, wherein the connector comprises a rod and the at least one mast is arranged at a preset distance from the telescoping jib head, and/or the connector comprises a cable and the at least one mast is able to be guyed in such a way that the angle between the mast and the telescoping jib is variably adjustable in a range between 10 degrees and 170 degrees.

12. The telescoping jib as claimed in claim 1, wherein one or each mast can of the at least one mast is configured to be erected by an auxiliary apparatus comprising a telescopable cylinder and/or a cable pull.

13. The telescoping jib as claimed in claim 1, wherein one or each mast of the at least one mast is configured to be erected by a telescoping movement of an inner box on which the respective mast is arranged.

14. The telescoping jib as claimed in claim 1, wherein a foot of the at least one mast is arranged adjacent to the basic box, or a foot of the at least one mast is arranged on a region of an inner box adjoining a next-outermost inner box, which region amounts to preferably 10 to 35% of the overall length of the inner box.

15. The telescoping jib as claimed in claim 1, wherein one or each mast of the at least one mast is configured to be erected and guyed by means of a tensioning frame and a connector, wherein the connector comprises one or a plurality of cables.

16. The telescoping jib as claimed in claim 15, wherein the tensioning frame comprises a luffing cable cross-member and the connector is configured to be deflected between the at least one mast and the tensioning frame in the region of a pivot axis of the telescoping jib via a deflector.

17. The telescoping jib as claimed in claim 1, wherein one or each mast of the at least one mast is configured to be guyed with respect to a foot bearing of the telescoping jib by a connector.

18. The telescoping jib as claimed in claim 1, wherein an additional mast is arranged on the basic box, and one or each mast of the at least one mast is configured to be guyed and/or pretensioned by a connector via the additional mast.

19. The telescoping jib as claimed in claim 1, wherein the at least one inner box comprises a last inner box and a second-innermost inner box, and wherein the at least one mast comprises a fold-out mast arranged on the last inner box, and wherein parts of the fold-out mast of the last inner box protrude from the second-innermost inner box, wherein the parts comprise a head part with cable pulleys.

20. A vehicle crane comprising: a plurality of axles and wheels; a lower carriage; a superstructure; and a telescoping jib mounted on the superstructure wherein the telescoping jib comprises a basic box; at least one inner box; and at least one mast that is configured to be folded out into a folded-out position and to be folded in into a folded-in position, wherein the mast is arranged on the inner box such that the inner box can be pushed into the basic box together with the mast in the folded-in position.

21. The vehicle crane as claimed in claim 20, wherein one or each mast of the at least one mast is configured to be guyed with respect to the superstructure of the vehicle crane by a connector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 shows a schematic side view of a telescoping jib with a folded-in mast and inner boxes partially pushed into the basic box;

[0035] FIG. 2 shows a schematic side view of the telescoping jib according to FIG. 1 with a mast folded out by 90 degrees;

[0036] FIG. 3 shows a schematic side view of the telescoping jib according to FIG. 1 with a mast folded out in an inclined manner;

[0037] FIG. 4 shows a schematic side view of a telescoping jib with a plurality of inner boxes and a folded-out mast;

[0038] FIG. 5 shows a schematic perspective view of an inner box with a C-shaped mast in the transport position or inoperative position;

[0039] FIG. 6 shows a schematic cross-sectional view (I-I) of the inner box according to FIG. 5;

[0040] FIG. 7 shows a schematic cross-sectional view (II-II) of the inner box according to FIG. 5;

[0041] FIG. 8 shows a schematic side view of a telescoping jib with a plurality of inner boxes and two folded-out masts on the innermost inner box;

[0042] FIG. 9 shows a schematic perspective view of an inner box with two masts in the transport position or inoperative position;

[0043] FIG. 10 shows a schematic cross-sectional view (III-III) of the inner box according to FIG. 9;

[0044] FIG. 11 shows a schematic side view of a telescoping jib with a plurality of inner boxes, a folded-out mast on the innermost and a folded-out mast on the third-innermost inner box;

[0045] FIG. 12 shows a schematic side view of a telescoping jib with a plurality of inner boxes and two mounted additional masts;

[0046] FIG. 13 shows a schematic side view of a telescoping jib according to FIG. 4 with a foot bearing and tensioning frame; and

[0047] FIG. 14 shows a schematic side view of a vehicle crane which can travel on the road, with a telescoping jib in accordance with the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0048] FIG. 1 shows a schematic side view of a telescoping jib 10. This comprises a basic box 11, an inner box 12 arranged in the basic box 11, and a telescoping jib head 13. The inner box 12 is shown pushed partially into the basic box 11. A mast 20 which can be folded out and which is shown in the folded-in inoperative position is arranged on the inner box 12. The mast 20 is thus in an inoperative position lying on the inner box 12. In the inoperative position, the mast 20 extends with its longitudinal direction parallel to a longitudinal direction of the inner box 12. It is very clear to see that the inner box 12 can be pushed into the basic box 11 together with the mast 20 in the folded-in inoperative position. The inner box 12 and the folded-in mast 20 are formed in such a way that the common clearance profile thereof is smaller than a receiving cross-section of the basic box 11. The mast 20 can therefore remain on the inner box 12 when this box is pushed into the basic box 11 in a telescoping manner. In no position does the mast 20 protrude beyond the overall length of the basic box 11 and inner box 12, i.e. not even when the inner box 12 is pushed into the basic box 11. In the illustrated position of the telescoping jib 10, this jib can be used to raise and/or lower a load, not shown, with the weight F without an increase in load-bearing capacity. For this purpose, a lifting cable, not shown, is deflected over the telescoping jib head 13.

[0049] In an alternative embodiment, parts of the fold-out mast 20 of the last inner box 12, 12′, in particular a head part with cable pulleys of the fold-out mast 20, protrude from the second-innermost inner box 12″. This produces the advantage that even larger cable pulleys and larger cable diameters can be used for the guying arrangement.

[0050] FIGS. 2 and 3 each show a schematic side view of the telescoping jib 10 according to FIG. 1 with the folded-out mast 20. By means of the mast 20 which can be folded out the load-bearing capacity of the telescoping jib 10 can be increased. The inner box 12 is fully extended out of the basic box 11 and the mast 20 folded out. It is also possible for the mast 20 to be formed in a telescopable manner. Connecting means 40, 50 engage at the free end of the mast 20. The connecting means 40, 50 together with the mast 20 form a guying arrangement for the telescoping jib 10.

[0051] The connecting means 40 is connected to the telescoping jib head 13, in particular is fastened thereto. The function of the connecting means 40 is also to prevent the mast 20 flipping downwards. The connecting means 40 can be a rod, cylinder and/or a cable. When a rod is used, the mast 20 is arranged at a preset distance from the telescoping jib head 13. The distance or angle b between the mast 20 and the telescoping jib 10 is to be selected prior to mounting of the rod. When a cable is used, the mast 20 can be guyed in such a way that the angle b can be variably adjusted in a range between 10 degrees and 170 degrees, preferably between 30 degrees and 110 degrees. When a cable is used, the distance or angle b can thus be modified even during operation. In order to adjust the distance or angle b the cable length is modified, in particular by means of a winch on the inner box 12. For this purpose, a deflection means 60 can also be used on the mast 20 (see FIG. 5). When a cable is used, the connecting means 40 is arranged in such a way that, with the mast 20 folded in and the telescoping jib 10 retracted, it can be jointly transported having been mounted thereon.

[0052] In FIG. 2, the mast 20 is folded out at a angle of b=90 degrees, i.e. at a right angle to the telescoping jib 10, and protrudes downwards. In contrast to this, the mast 20 illustrated in FIG. 3 is folded out at an angle of b<90 degrees, for instance 60 degrees.

[0053] The connecting means 50 is connected to the basic box 11, in particular is fastened thereto. It can also alternatively be connected to a tensioning frame 80 and/or a foot bearing 14 (see FIG. 13). The connecting means 50 is preferably of modifiable length and is therefore a cable. The function of the connecting means 50 is also to prevent the mast 20 flipping upwards.

[0054] It is very clear to see that when the inner box 12 is in the fully extended position, the mast 20 is arranged with its foot in the region of the inner box 12 adjoining the overlap region with respect to the basic box 11. In this way, a greatest possible mast length can be ensured and/or a best possible result—in terms of static relief of loading of the telescoping jib 10—can be achieved. In principle, an arrangement of the foot of the mast 20 in a position pushed towards the telescoping jib head 13 is also possible.

[0055] FIG. 4 shows a schematic side view of a telescoping jib 10 with a plurality of inner boxes 12′, 12″, 12″′, 12″″ and a folded-out mast 20. All descriptions relating to the inner box 12 or inner boxes 12 apply equally to the inner boxes 12′, 12″, 12″′, 12″″. The inner boxes 12 are each arranged one inside another and jointly in the basic box 11 and are fully extended. The mast 20 is arranged on the innermost inner box 12′. The innermost inner box 12′ can be pushed, together with the mast 20 in the folded-in position, into the second-innermost inner box 12″. In this embodiment, the innermost inner box 12′ and the folded-in mast 20 are formed in such a way that the common clearance profile thereof is smaller than a receiving cross-section of the second-innermost inner box 12″. The mast 20 can remain on the innermost inner box 12′ when this box is pushed into the second-innermost inner box 12″. In a preferred case, in no position does the mast 20 protrude beyond the overall length of the basic box 11 and all inner boxes 12, i.e. not even when all inner boxes 12 are pushed into the basic box 11.

[0056] It is very clear to see that when the innermost inner box 12′ is in the fully extended position, the mast 20 is arranged with its foot in the region of the innermost inner box 12′ adjoining the overlap region with respect to second-innermost inner box 12″. In this way, the greatest possible mast length can be ensured and/or a best possible result—in terms of static relief of loading of the telescoping jib 10—can be achieved. In principle, an arrangement of the foot of the mast 20 in the half of the innermost inner box 12′ orientated towards the telescoping jib head 13 is also possible.

[0057] Otherwise, the statements relating to FIGS. 1 to 3 also apply to the embodiment illustrated in FIG. 4.

[0058] FIG. 5 shows a schematic perspective view of an inner box 12. The telescoping jib 10 with a plurality of inner boxes 12 is the innermost inner box 12′. The telescoping jib head 13 is arranged at one end of the inner box 12. At the other end of the inner box 12 is the overlap region 12a with respect to the basic box 11 or with respect to the second-innermost inner box 12″. The inner box 12 consists of a main support 12b and the overlap region 12a. The main support 12b is adjoined by the overlap region 12a and possibly in an opposing arrangement the telescoping jib head 13. The main support 12b is a region of the inner box 12 with a smaller cross-section. The cross-sections of the overlap region 12a and of the main support 12b are shown in a simplified manner as a rectangle and hexagon in the illustration. However, both cross-sections preferably have a mutually tailored shape and are preferably rounded as shown in the cross-sectional view according to FIG. 6.

[0059] The mast 20 is arranged in the region of the main support 12b. The mast 20 is C-shaped and partially surrounds the inner box 12 from above in the inoperative position shown at this point. In this way it is ensured that the mast 20 is rigid in compression but does not expand the clearance profile of the inner box 12 and so both can be pushed together into the basic box 11 or into the second-innermost inner box 12″. The mast 20, referred to as C-shaped, comprises a planar base 20b, which extends in the longitudinal direction of the inner box 12, and limbs 20c which spread from the base in the peripheral direction and are preferably linear. Therefore, the mast 20 is substantially half-shell-shaped and partially surrounds the inner box 12 from above. Other surrounding angles for the limbs 20c are also possible.

[0060] The mast 20 is connected to the inner box 12 in an articulated manner via one or two fold-out joints 20a, not illustrated. Two deflection means 60 (only the front one being shown) are rotatably mounted at the free end of the mast 20. The deflection means 60 are arranged in such a way that, with the mast 20 folded in and the telescoping jib 10 retracted, they can be jointly transported having been mounted thereon. The deflection means 60 is in each case preferably a pulley and serves to deflect the connecting means 40, preferably a cable, which is used for the guying of the mast 20 with respect to the telescoping jib head 13. Alternatively, the deflection means 60 can in each case be arranged on the telescoping jib head 13.

[0061] The mast 20 can be erected by means of an auxiliary apparatus 70, not illustrated, which preferably comprises a telescopable cylinder and/or a cable pull. For this purpose, the auxiliary apparatus 70 is arranged and fastened at one of its ends on the inner box 12 and arranged and fastened at its other end on the mast 20. The fastenings are preferably mounted in a rotationally articulated manner and so the change in the angle between the auxiliary apparatus 70 and mast 20 taking place during erection of the mast 20 is rendered possible. When the mast is guyed accordingly, the auxiliary apparatus 70 is load-free during raising and/or lowering of a load. When the mast 20 is folded in, the auxiliary apparatus 70 extends substantially parallel to the mast.

[0062] FIG. 6 shows a schematic cross-sectional view (I-I) of the inner box 12 according to FIG. 5. The C-shaped design of the mast 20 and the surrounding of the main support 12b of the inner box 12 are very clear to see.

[0063] FIG. 7 shows a schematic cross-sectional view (II-II) of the inner box 12 according to FIG. 5. The two fold-out joints 20a by means of which the mast 20 is connected in an articulated manner to a stiffening wall of the overlap region 12a of the inner box 12 are very clear to see.

[0064] FIG. 8 shows a schematic side view of a telescoping jib 10 with a plurality of inner boxes 12′, 12″, 12″′, 12″″. All descriptions relating to the inner box 12 or inner boxes 12 apply equally to the inner boxes 12′, 12″, 12″′, 12″″. In this embodiment, two masts 20, 20′, which can be folded out, are arranged on the innermost inner box 12′ and are shown folded out. The masts 20, 20′ are arranged on the periphery of the innermost inner box 12′ and as a mirror image with respect to the longitudinal direction thereof on a middle axis. In this way, the masts 20, 20′ are arranged in the folded-out position in a v-shape next to, and with respect to, each other. A spreading angle a is formed between the masts 20, 20′ in the folded-out position. The angle of spread a can be adjusted by a corresponding arrangement of the fold-out joint 20a on the periphery of the inner box 12. The connecting means 40, 50 engage each mast 20, 20′ respectively at the free end thereof. The connecting means 40, 50 together with the masts 20, 20′ form a guying arrangement for the telescoping jib 10. In addition, a connecting means 30, preferably a cable or a strut, is arranged between the masts 20 in the folded-out position and is fastened in each case to the mast 20, 20′, preferably to the free end thereof. By this connecting means 30 it is ensured that the adjusted angle of spread a does not change during raising and/or lowering of a load. In addition, transverse bending of the masts 20, 20′ is reduced by the connecting means 30. If a cable or a plurality of cables is/are used as connecting means 30, 40, 50, each of the cables is arranged such that, with the mast 20, 20′ folded in and the telescoping jib 10 retracted, it can be jointly transported having been mounted thereon.

[0065] FIG. 9 shows a schematic perspective view of an inner box 12 with two masts 20, 20′ which can be folded out. A telescoping jib 10 with a plurality of inner boxes 12 is the innermost inner box 12′. The telescoping jib head 13 is arranged at one end of the inner box 12. At the other end of the inner box 12 is the overlap region 12a with respect to the basic box 11 or with respect to the next-outermost inner box 12″. The inner box 12 consists of a main support 12b and the overlap region 12a. The main support 12b is adjoined by the overlap region 12a and possibly in an opposing arrangement the telescoping jib head 13. The main support 12b is a region of the inner box 12 with a smaller cross-section. The cross-sections of the overlap region 12a and of the main support 12b are shown in a simplified manner as a rectangle and hexagon in the illustration. However, both cross-sections preferably have a mutually tailored shape and are preferably rounded as shown in the cross-sectional view according to FIG. 10.

[0066] In the region of the main support 12b, two masts 20, 20′ are arranged in the inoperative position illustrated in this case, each on one side of the main support 12b. The masts 20, 20′ are connected in an articulated manner to the inner box 12 in each case via a fold-out joint 20a. A deflection means 60 is rotatably mounted at the free end of each mast 20, 20′. The deflection means 60 are arranged in such a way that, with the masts 20, 20′ folded in and the telescoping jib 10 retracted, they can be jointly transported having been mounted thereon. The deflection means 60 is in each case preferably a pulley and serves to deflect the connecting means 40 which is used for the guying of the mast 20, 20′ with respect to the telescoping jib head 13. Alternatively, the deflection means 60 can in each case be arranged on the telescoping jib head 13.

[0067] Each mast 20, 20′ can be erected by means of an auxiliary apparatus 70 which preferably comprises a telescopable cylinder. For this purpose, the auxiliary apparatus 70 is arranged and fastened at one of its ends on the inner box 12 and arranged and fastened at its other end on the mast 20, 20′. The fastenings are preferably mounted in a rotationally articulated manner and so the change in the angle between the auxiliary apparatus 70 and mast 20, 20′ taking place during erection of the mast 20, 20′ is rendered possible. When the mast is guyed accordingly, the auxiliary apparatus 70 is load-free during raising and/or lowering of a load. When the mast 20, 20′ is folded in, the auxiliary apparatus 70 extends substantially parallel to the mast.

[0068] Alternatively, the masts 20, 20′ can be erected e.g. by means of a tensioning frame 80, not illustrated.

[0069] FIG. 10 shows a schematic cross-sectional view (III-III) of the inner box 12 according to FIG. 9. The masts 20 arranged on both sides of the main support 12b of the inner box 12 are very clear to see.

[0070] FIG. 11 shows a schematic side view of a telescoping jib 10 with a plurality of inner boxes 12′, 12″, 12″′, 12″″. All descriptions relating to the inner box 12 or inner boxes 12 apply equally to the inner boxes 12′, 12″, 12″′, 12″″. In addition to the mast 20 arranged on the innermost inner box 12′, a further mast 21 is arranged on a further inner box 12, the third-innermost inner box 12″′, in order to increase the load-bearing capacity of the telescoping jib 10 further in a flexible manner. This further mast 21 which can be folded out is preferably C-shaped. However, an embodiment with two independent masts 21, as described above for the mast 20, 20′, is also possible. Thus, if a further increase in load-bearing capacity is necessary, this can be achieved by means of the further mast 21 or the masts 21. Each mast 21 can be folded out and possibly telescoped. Provision is made for this mast 21 also to be able to remain on the third-innermost inner box 12″′ when said box is pushed into the next-outermost, the fourth-innermost, inner box 12″″. The mast 21 can be used to erect the mast 20. For this purpose, the mast 21 can preferably be erected first and then the mast 20. Both masts are preferably erected using the connecting means 50. It is also possible for a further connecting means to be used between the masts 20, 21 and for the masts 20, 21 to be guyed with respect to each other thereby. The mast 21 would in this case be erected using the connecting means 50, the mast 20 would be erected with the further connecting means.

[0071] It is very clear to see that when the third-innermost inner box 12″′ is in the fully extended position, the mast 21 is arranged with its foot in the region of the third-innermost inner box 12″′ adjoining the overlap region with respect to fourth-innermost inner box 12″″. In principle, an arrangement of the foot of the mast 20 in the half of the third-innermost inner box 12″′ orientated towards the overlap region 12a with respect to the second-innermost inner box 12″ is also possible.

[0072] Otherwise, the statements relating to FIG. 4 also apply to the embodiment illustrated in FIG. 11.

[0073] FIG. 12 shows a schematic side view of a telescoping jib 10 with a plurality of inner boxes 12′, 12″, 12″′, 12″″, two masts 20, 20′ which can be folded out and two mounted additional masts 22, 22′. The connecting means 40, 50 engage each fold-out mast 20, 20′ respectively at the free end thereof. The masts 20, 20′ which can be folded out are each connected by the connecting means 50 to the mounted additional mast 22, 22′ and can be guyed with respect thereto. A tensioning frame 80 arranged on each of the two mounted additional masts 22, 22′ is used to pretension the connecting means 50. The mounted additional masts 22, 22′ are connected to the telescoping jib 10 by a connecting means 51. The connecting means 40, 50, 51 together with the masts 20, 20′ and the additional masts 22, 22′ form a guying arrangement for the telescoping jib 10.

[0074] Otherwise, the statements relating to FIG. 8 also apply to the embodiment illustrated in FIG. 12.

[0075] FIG. 13 shows a schematic side view of a telescoping jib 10 according to FIG. 4 with a foot bearing 14 and tensioning frame 80. The telescoping jib 10 is luffably mounted by means of the foot bearing 14. The mast 20 can be erected and guyed by means of the tensioning frame 80 and the connecting means 50 which preferably comprises a cable. The tensioning frame 80 comprises a winch frame which is arranged on the foot bearing 14. However, it is also possible for the winch frame to be arranged on the basic box 11. Alternatively it is also possible for guying to be carried out only by a connecting means 50 without a tensioning frame 80, e.g. via a cable or rod. The tensioning frame 80 comprises a luffing cable cross-member, preferably for multiple cable reeving. By means of the luffing cable cross-member it is possible to ensure guidance of the cable without a considerable amount of diagonal pull. One or a plurality of guying cylinders, which pretension the connecting means in the region of the telescoping jib head or telescoping jib foot with a predetermined force, could be used in conjunction with or without a winch frame.

[0076] Otherwise, the statements relating to FIG. 4 also apply to the embodiment illustrated in FIG. 12.

[0077] FIG. 14 shows a schematic side view of a vehicle crane 100, in particular a mobile crane, which can travel on the road, having a lower carriage 101 and a superstructure 102 arranged to be able to rotate on the lower carriage 101 via a rotational connection 107 about a vertical axis of rotation. The superstructure 102 and lower carriage 101 can alternatively also be rigidly mounted one on the other. A telescoping jib 10 in accordance with the invention is mounted on the superstructure 102 via a foot bearing 12 and can be luffed by a luffing cylinder 108. The telescoping jib 10 is shown erect but can also be laid on the lower carriage 101 when the inner box 12 is fully retracted, in particular for the purpose of road travel.

[0078] The telescoping jib 10 is illustrated schematically in the form of the basic box 11 and has a plurality of inner boxes 12, not shown for reasons of simplification, which are arranged one inside another and can be telescoped out. The illustrated telescoping jib head 13 is arranged on the innermost inner box 12′. For an increase in load-bearing capacity, the telescoping jib 10 can be provided with a mast 20 and/or a mast 21 and/or an additional mast 22—as described above. The mast or masts 20, 20′, 21, 22, 22′ of the telescoping jib 10 is/are able to be guyed and/or deflected with respect to the superstructure 102 and/or with respect to the foot bearing 14 arranged thereon. Guying can be effected e.g. by the tensioning frame 80 which can be arranged on the superstructure 102, the telescoping jib 10 and/or the additional masts 22, 22′. A load, not shown, can be lifted by a lifting mechanism which is also arranged on the superstructure 102.

[0079] The lower carriage 101 additionally comprises nine vehicle axles 105 which are each provided with two rubber-tyred wheels 106 suitable for road travel. The lower carriage 101 can naturally comprise more or less than nine vehicle axles 105 or alternatively can comprise a crawler track. The vehicle crane 100 has a driver's cabin 104.

[0080] It is self-evident that the principle of the present invention can also be applied to crawler cranes. In addition, other applications of the telescoping jib 10, e.g. fixedly installed on a ship, are possible.