Mounting framework, vehicle crane, and method for mounting bracing apparatus on telescoping jib

Abstract

To provide: an optimized mounting framework of a vehicle crane; a vehicle crane comprising a mounting framework with an optimized temporary storage option for a bracing apparatus; and optimized methods for mounting a bracing apparatus on a telescoping jib of a vehicle crane.SOLUTION: At least one bracing arm 9a of a bracing apparatus of a vehicle crane can be temporarily stored on a mounting framework 11, where the mounting framework 11 comprises at least one displaceable sliding frame 11c, and a single bracing arm 9a can be temporarily stored on the sliding frame 11c. To provide a mounting framework of a vehicle crane with an optimized placing option for a bracing apparatus on a lower carriage, the mounting framework 11 comprises exactly one displaceable sliding frame 11c.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a mounting frame for a vehicle crane, on which at least one bracing arm of a bracing device of the vehicle crane can be temporarily stored, the mounting frame comprising at least one displaceable sliding frame, and a single bracing arm can be temporarily stored on the sliding frame. Furthermore, the present invention relates to a vehicle crane comprising such a mounting frame. The present invention also relates to a method for mounting a bracing device on a telescopic jib of a vehicle crane. [Background technology]

[0002] German patent specification DE 10 2021111 922 B3 already discloses a mounting and transport frame for two bracing arms that can be attached to the telescopic jib of a vehicle crane to increase the load-bearing capacity. The bracing arms are attached to the same mounting and transport frame for transport on the low-bed loader, for transport between the low-bed loader and the vehicle crane and for preparation for mounting on the vehicle crane. The mounting and transport frame essentially consists of a base frame having a left frame part with a support leg for receiving the first bracing arm and a right frame part with a support leg for receiving the second bracing arm. The right and left frame parts are displaceably arranged relative to each other on the base frame so that they can be moved as required from a narrow transport position to a wide mounting position and vice versa. For transport on the low-bed loader, the mounting and transport frame is arranged on the low-bed loader with the supported first and second bracing arms and the frame parts are arranged in the narrow transport position. To attach the first and second bracing arms to the telescopic jib of the vehicle crane, the mounting and transport frame is lifted by the telescopic crane with the two bracing arms to the mounting surface of the lower carriage of the vehicle crane and bolted to this position. In one variant, the two bracing arms are then moved away from each other from the narrow transport position to the wide mounting position. The telescopic jib is then luffed down and introduced between the two bracing arms, and the two bracing arms are individually fastened to the telescopic jib, and then each is removed from the mounting and transport frame. In a typical manner, the telescopic jib is then erected, the bracing arms are unfolded and the bracing is fastened. During operation of the vehicle crane, the mounting and transport frame can remain on the lower carriage and can be used as a storage place for the bracing arms if necessary.

[0003] European patent specification EP 2 248 754 B1 discloses another vehicle crane with a bracing arm that can be attached by the vehicle crane itself. In this case, the two bracing arms are also transported by a separate low-bed loader to the placement site of the vehicle crane. The bracing arms are connected at one end via a U-shaped retaining frame to form a structural unit, and at the opposite ends are each provided with a removable and length-variable foot support. To attach the bracing arms to the telescopic jib of the vehicle crane, the structural unit is lifted from the low-bed loader by the telescopic jib of the vehicle crane and placed behind the lower carriage of the vehicle crane on the extension of the lower carriage. In this case, the length-variable foot support rests on the ground and the removable foot support rests in the area of ​​the U-shaped retaining frame of the lower carriage. Again, after the telescopic jib has been inserted between the two bracing arms, the bracing arms are fixed to the telescopic jib via the retaining frame and the removable foot support is removed from the retaining frame. The length-variable foot support remains on the bracing arm.

[0004] Furthermore, European patent specification EP 1 342 692 B1 discloses a further vehicle crane, the two bracing arms of which are also transported to the placement site on a low-bed loader separately from the vehicle crane. Upon arrival at the placement site, the bracing arms are lifted from the low-bed loader by the vehicle crane and temporarily stored in the lower carriage of the vehicle crane. For this purpose, four-foot-like brackets are arranged on the lower carriage, on which the two bracing arms of the bracing device are placed. The telescopic jib of the vehicle crane is then luffed down to an approximately horizontal receiving position between the two bracing arms and the bracing arms are coupled to the telescopic jib.

[0005] Furthermore, WO 2005 / 092 775 A1 already discloses a structural unit consisting of a mounting frame and two bracing arms for mounting on a vehicle crane, which is transported by a low loader between the deployment sites of the vehicle crane, placed on the extension of the vehicle crane or temporarily stored via the attachable and foldable legs of the base surface during the mounting and dismounting of the bracing arms on the telescopic jib of the vehicle crane, and fixed to the top of the telescopic jib at the specified mounting points at the end of the mounting procedure. Summary of the Invention

[0006] It is therefore an object of the present invention to provide an optimized mounting frame for a vehicle crane and a vehicle crane comprising a mounting frame with an optimized temporary storage option for a bracing device, as well as an optimized method for mounting a bracing device to a telescopic jib of a vehicle crane.

[0007] This object is achieved by a mounting frame having the features of claim 1, a vehicle crane having the features of claim 9 and a method for mounting a bracing device on a telescopic jib of a vehicle crane having the features of claims 12 and 13. The dependent claims 2 to 8 and 10 to 11 describe advantageous embodiments of the invention.

[0008] According to the invention, in the case of the mounting frame of the vehicle crane, at least one bracing arm of the bracing device of the vehicle crane can be temporarily stored on the mounting frame, the mounting frame comprises at least one displaceable sliding frame, a single bracing arm can be temporarily stored on the sliding frame, but due to the fact that the mounting frame comprises exactly one displaceable sliding frame, optimal temporary storage options of the bracing device are achieved. The mounting frame is therefore simple and lightweight in design. In the context of the invention, the feature regarding the temporary storage of a single bracing arm is understood to mean that at any given time only the first bracing arm or the second bracing arm can be temporarily stored. The feature that there is exactly one sliding frame means that the first bracing arm and the second bracing arm can be only temporarily stored and displaced sequentially in time to their respective mounting positions.

[0009] In an advantageous manner, the sliding frame is configured such that, starting from the receiving position, it can be displaced either in a first direction or in a second direction opposite to the first direction and back again. The displacement movement is preferably linear in each case. Simplicity is provided by the fact that with the help of the mounting frame only one bracing arm can be temporarily stored.

[0010] Structurally, it is particularly advantageous if the sliding frame can be displaced in a linear mounting direction and back again, the mounting direction extending perpendicular to the longitudinal direction of the mounting frame.

[0011] In an advantageous manner, the mounting frame comprises a base frame, an intermediate frame and a sliding frame, the intermediate frame being arranged on the base frame and the sliding frame being displaceably arranged on the intermediate frame.

[0012] In another embodiment, the intermediate frame and the sliding frame form a structural unit and can be detached in a coupled state from the base frame and fixed to the base frame in such a way that, after pivoting, starting from a preferably fully retracted receiving position, the sliding frame can be displaced only in a second direction opposite to the first direction and back again.

[0013] In an alternative preferred embodiment, only a single storage location for the first bracing arm or the second bracing arm is configured to be located on the sliding frame.

[0014] In an alternative preferred embodiment, the first storage location for the first bracing arm and the second storage location for the second bracing arm are disposed on the sliding frame.

[0015] In particular, the first support element is preferably arranged on the sliding frame in a first storage position, and the second support element is preferably arranged on the sliding frame in a second storage position.

[0016] Furthermore, according to the invention, in the case of vehicle cranes with a mounting frame, the mounting frame is fixed to the undercarriage of the vehicle crane in the extension of the undercarriage, thus realizing optimal temporary storage options for the bracing device, the mounting frame is therefore held at the front or rear of the undercarriage, i.e. on the front or rear side of the undercarriage, oriented together with the undercarriage and not supported on or above the surface of the undercarriage.

[0017] In this case, in an advantageous manner, the mounting frame is arranged at its rear end remote from the lower carriage to be supported on the ground via support legs.

[0018] Typically, the vehicle crane includes a lower carriage, a superstructure, and a telescopic jib. The telescopic jib includes a base box with an extendable inner box, and a bracing device having a first bracing arm and a second bracing arm can be mounted on the telescopic jib, and for mounting purposes, the first bracing arm and the second bracing arm can be mounted on a mounting frame one by one.

[0019] According to the present invention, an optimized method for mounting a bracing device on a telescopic jib of a vehicle crane and an optimized temporary storage option for the bracing device is achieved by the following steps: Providing a first transport unit in the area of ​​the vehicle crane, the first transport unit having a mounting frame adapted to be received in the first transport unit; Lifting the mounting frame from the first transport unit by the vehicle crane; aligning the mounting frame in line with an extension of a lower carriage of the vehicle crane; securing the mounting frame to the lower carriage and removing the vehicle crane from the mounting frame; Providing a second transport unit having the bracing device within the area of ​​the vehicle crane, the bracing device being received by the second transport unit and including a first bracing arm and a second bracing arm; Raising the first bracing arm from the second transport unit by the vehicle crane; lowering the first bracing arm of the bracing device onto a sliding frame of the mounting frame at a first storage location by the vehicle crane; displacing the sliding frame in a first direction from a receiving position to a laterally extending lowered position; luffing the telescoping jib next to the first bracing arm; Displacing the sliding frame from the lowered position to a central fixed position in a direction opposite to the mounting direction and the first direction, wherein the fixed frame of the telescopic jib abuts against a basic box of the telescopic jib at the central fixed position; Fixing the first bracing arm together with the fixing frame to the basic box; Repeating the above steps associated with the second bracing arm beginning with raising the first bracing arm from the second transport unit by the vehicle crane and associated with a second storage location on the sliding frame and a second orientation.

[0020] According to the present invention, a further optimized method for mounting a bracing device on a telescopic jib of a vehicle crane and also an optimized temporary storage option for the bracing device is realized by the following steps: Providing a first transport unit in the area of ​​the vehicle crane, the first transport unit having a mounting frame adapted to be received in the first transport unit; Lifting the mounting frame from the first transport unit by the vehicle crane; aligning the mounting frame in line with an extension of a lower carriage of the vehicle crane; securing the mounting frame to the lower carriage and removing the vehicle crane from the mounting frame; Providing a second transport unit having the bracing device within the area of ​​the vehicle crane, the bracing device being received by the second transport unit and including a first bracing arm and a second bracing arm; Raising the first bracing arm from the second transport unit by the vehicle crane; lowering the first bracing arm of the bracing device onto a sliding frame of the mounting frame by the vehicle crane; displacing the sliding frame in a first direction from a receiving position to a laterally extending lowered position; luffing the telescoping jib next to the first bracing arm; Displacing the sliding frame from the lowered position to a central fixed position in a direction opposite to the mounting direction and the first direction, wherein the fixed frame of the telescopic jib abuts against a basic box of the telescopic jib at the central fixed position; Fixing the first bracing arm together with the fixing frame to the basic box; removing the intermediate frame and the sliding frame as a structural unit from the base frame in a combined state, pivoting the structural unit and fixing it to the base frame in such a way that, starting from the receiving position, preferably fully retracted, the sliding frame can be displaced only in a second direction opposite to the first direction and back again; Repeating the above steps involving the second bracing arm starting with raising the first bracing arm from the second transport unit by the vehicle crane on the sliding frame and in a second direction.

[0021] It is clear that with respect to the present invention, the first bracing arm and the second bracing arm can also be transported separately in different transport units and can also be picked up therefrom or placed thereon. [Brief description of the drawings]

[0022] Exemplary embodiments of the invention will be explained in more detail in the following description with reference to two variants (first variant FIGS. 1-12, second variant FIGS. 13-24).

[0023] [Figure 1] FIG. 1 shows a schematic and perspective view of a vehicle crane system consisting of a vehicle crane and two transport units. [Diagram 2] FIG. 2 shows a schematic and perspective view of the vehicle crane shown in FIG. 1 and a first transport unit with a raised mounting frame. [Diagram 3]FIG. 3 shows a schematic and perspective view of the vehicle crane shown in FIG. 2 with the mounting frame installed. [Figure 4] FIG. 4 shows a plan view of the mounting frame of the vehicle crane shown in FIG. [Diagram 5] FIG. 5 shows a schematic and perspective view of the vehicle crane and second transport unit shown in FIG. 1 with the bracing arm raised. [Figure 6] FIG. 6 shows a schematic and perspective view of the vehicle crane shown in FIG. 5 mounted on a mounting frame having bracing arms attached thereto. [Figure 7] FIG. 7 is a detailed perspective view of the mounting frame with the first bracing arm shown in FIG. [Figure 8] FIG. 8 shows a schematic and perspective side view of a vehicle crane with the telescopic jib lowered. [Figure 9] 9 is an enlarged cross-sectional view of the top view of the first bracing arm shown in FIG. 8. FIG. [Figure 10] FIG. 10 is a more detailed perspective view of the mounting frame shown in FIG. 4, including a second bracing arm. [Figure 11] FIG. 11 is a detailed perspective view of the mounting frame with the first bracing arm and the second bracing arm shown in FIG. [Figure 12] FIG. 12 shows a schematic and perspective view of a vehicle crane fitted with two bracing arms. [Figure 13] FIG. 13 shows a schematic and perspective view of a vehicle crane system consisting of a vehicle crane and two transport units. [Figure 14] FIG. 14 shows a schematic diagram of the vehicle crane shown in FIG. 13 and the first transport unit with the raised mounting frame. [Figure 15] FIG. 15 is a schematic diagram of the vehicle crane shown in FIG. 14 with the mounting frame attached. [Figure 16] FIG. 16 is a detailed perspective view of the mounting frame on the vehicle crane shown in FIG. [Figure 17] FIG. 17 is a schematic diagram of the vehicle crane shown in FIG. 13 and a second transport unit with the bracing arm raised. [Figure 18] FIG. 18 is a schematic diagram of the vehicle crane shown in FIG. 17 mounted on a mounting frame having bracing arms attached thereto. [Figure 19] FIG. 19 is a detailed perspective view of the mounting frame with the first bracing arm shown in FIG. [Figure 20] FIG. 20 shows a schematic side view of a vehicle crane with the telescopic jib lowered. [Figure 21] FIG. 21 is an enlarged cross-sectional view of the top view of the first bracing arm shown in FIG. 20. [Figure 22] FIG. 22 is a more detailed perspective view of the mounting frame shown in FIG. [Figure 23] 23 is a detailed perspective view of the mounting frame with the first bracing arm and the second bracing arm shown in FIG. 19. [Figure 24] FIG. 24 is a schematic and perspective view of a vehicle crane with two bracing arms attached for reinforcement. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Firstly, the method of attaching the first bracing arm 9a and the second bracing arm 9b of the bracing device 9 to the telescopic jib 6 of the vehicle crane 2 and secondly, a first variant of the mounting frame 11 used for this purpose will be described in more detail below.

[0025] FIG. 1 shows a schematic and perspective view of a vehicle crane system 1 with a vehicle crane 2 and a first transport unit 3a and a second transport unit 3b, respectively, installed on a ground surface U. The first transport unit 3a and the second transport unit 3b are typically designed as trailer trucks with trailers. Such a vehicle crane system 1 is necessary because the vehicle crane 2 itself is very heavy, so that it must be driven to the respective installation site usually partially disassembled in order to be able to comply with the maximum values ​​prescribed for the public road network regarding axle loads and vehicle weight. Therefore, further accessories of the vehicle crane 2, such as bracing devices 9 for increasing the load-bearing capacity of the vehicle crane 2, telescopic jib extensions, the entire telescopic jib 6 or counterweights, are often transported separately on the transport units 3a, 3b.

[0026] A road-going vehicle crane 2 typically comprises a multi-axle undercarriage 4 with pneumatically tyred wheels 5. On the undercarriage 4, a superstructure 7 is arranged, on which a telescopic jib 6 is mounted and which can be swiveled about a vertical axis relative to the undercarriage 4. On the telescopic jib 6, a basic box 6a, which is connected to the superstructure 7 and can be swiveled about a horizontal axis in the region of the telescopic jib foot 6c of the telescopic jib 6, receives a number of linearly telescopic inner boxes 6b, of which only the first one 6b is shown. On the free end of the telescopic jib 6, in particular on a telescopic jib head 6d arranged on the innermost one of the inner boxes 6b, a lifting cable 8 runs, on which a load pick-up means, such as a load hook with a lower block for a cable reeving device, is suspended.

[0027] The two transport units 3a, 3b each have a loading surface 3c which is typically part of a low bed loader.

[0028] The mounting frame 11 is transported by the first transport unit 3a. The mounting frame 11 has a function of an auxiliary frame used when attaching the first and second bracing arms 9a, 9b to the telescopic jib 6. The mounting frame 11 mainly consists of a lower base frame 11a, preferably in the shape of a lattice-like mast section, a central intermediate frame 11b and an upper sliding frame 11c (see Figures 4 and 7), and serves to extend the lower carriage 4 and provide an option to temporarily store the two bracing arms 9a, 9b.

[0029] A bracing device 9 for the telescopic jib 6 is transported on the loading surface 3c of the second transport unit 3b as an attachment to the vehicle crane 2. Such a bracing device 9 is known to increase the load-bearing capacity of the vehicle crane 2, to provide rear and side supports for the telescopic jib 6 and to reduce the elastic sagging of the telescopic jib 6 during operation of the vehicle crane 2. For this purpose, the bracing device 9 is usually attached to the basic box 6a of the telescopic jib 6, in one embodiment in the area of ​​the upper collar 6e. The bracing device 9 consists of a first bracing arm 9a and a second bracing arm 9b which are connected to the telescopic jib 6 and can be spread out backwards in a V-shape to the operating position (see FIG. 12). The first and second bracing arms 9a, 9b are also provided in their central and lower regions with tensioning mechanisms 9d in the form of cable winches for appropriately tensioning tensioning means such as the strut cables 12a and strut rods 12b (see FIG. 12) of the associated struts. In the second transport unit 3b, the two bracing arms 9a, 9b are in a horizontal, parallel and spaced apart transport position. In the transport position, the two bracing arms 9a, 9b are oriented such that their longitudinal direction is substantially parallel to the longitudinal direction of the second transport unit 3b. Furthermore, the two bracing arms 9a, 9b are preferably arranged as close as possible to each other on the loading surface 3c so as not to protrude laterally beyond the loading surface. In the mounting position of the two bracing arms 9a, 9b on the telescopic jib 6, the two bracing arms 9a, 9b are arranged adjacent to each other and the distance between the two bracing arms 9a, 9b is greater than in the transport position and adapted to the width of the telescopic jib 6. The two bracing arms 9a, 9b are arranged on a loading surface 3c in a common transport frame 10 which is adapted to the shape of the two bracing arms 9a, 9b and is fixed in this position for transport purposes.

[0030] FIG. 2 shows yet another schematic and three-dimensional view of the vehicle crane 2 and the first transport unit 3a shown in FIG. 1. At the start of the so-called rigging procedure, in which the first bracing arm 9a and the second bracing arm 9b are attached to the telescopic jib 6, the first transport unit 3a is oriented relative to the vehicle crane 2 such that its longitudinal direction is in the extension of the vehicle crane 2 relative to the longitudinal direction of the vehicle crane 2. In this case, a distance remains between the vehicle crane 2 and the first transport unit 3a. Furthermore, in this case, the rear end 4a of the undercarriage 4, which is opposite the cab 4b of the vehicle crane 2, and the rear end 3d of the second transport unit 3b face each other, so that the loading surface 3c of the first transport unit 3a faces the vehicle crane 2. Alternatively, the vehicle crane 2 can also be oriented in correspondence with the first transport unit 3a. Once oriented, in a next rigging step, the mounting frame 11 can be lifted from the loading surface 3c by the vehicle crane 2 and the first transport unit 3a can be moved.

[0031] In the next step, as shown in FIG. 3, which shows a schematic and perspective view of the mounting frame 11 mounted on the vehicle crane 2 shown in FIG. 2, it is clear that the mounting frame 11 is moved by the vehicle crane 2 into a fixed position on the rear end 4a of the lower carriage 4. In this coupled position, the front end 11e of the mounting frame 11 abuts on the rear end 4a of the lower carriage 4. The mounting frame 11 is lowered by the vehicle crane 2 so that the upper surface of the mounting frame 11 is approximately at the same level with the surface of the lower carriage 4 and the mounting frame 11 extends the bearing surfaces of the two bracing arms 9a, 9b of the lower carriage 4. In this coupled position, the mounting frame 11 is fixed to the lower carriage 4, in particular by bolts. A support leg 11d, the length of which can be changed, is also arranged on the opposite side, i.e. on the rear end 11f of the mounting frame 11, in order to support the free rear end 11f of the mounting frame 11 on the ground U. The vehicle crane 2 or its lifting cable 8 can then be removed from the mounting frame 11 and made available for the next installation procedure.

[0032] FIG. 4 is a plan view of the mounting frame 11 shown in FIG. 3, already fixed to the undercarriage 4 of the vehicle crane 2. In contrast to FIG. 3, in a further rigging step the lifting cables 8 have been removed from the mounting frame 11. The structure of the mounting frame 11 will be explained in more detail below with reference to FIG. 4. The mounting frame 11 essentially consists of a lower base frame 11a, a central intermediate frame 11b, a single upper sliding frame 11c and a support leg 11d (see also FIG. 7). The base frame 11a has a lattice mast structure and may be the lattice mast part of a telescopic jib extension with a triangular cross section. The base frame 11a has substantially the shape of a rectangular parallelepiped or a triangular prism (see FIG. 7). The base frame 11a also has a longitudinal direction G, which is oriented in extension with respect to the longitudinal direction L of the undercarriage 4 at the connection position of the mounting frame 11. The longitudinal direction G is therefore shown centrally in Fig. 4 relative to the symmetrical base frame 11a and also corresponds to the centre line GM of the mounting frame 11. The length of the base frame 11a is selected so that the first and second bracing arms 9a, 9b can be placed on the mounting frame 11 one after the other in time, so that the vehicle crane 2 with its lowered telescopic jib 6, in particular its basic box 6a, can move next to the bracing arm 9a, 9b which is respectively raised (see Fig. 8). The intermediate frame 11b is removably fixed to the base frame 11a, preferably clamped or screwed and fixed in position after fixing, said intermediate frame supports a sliding frame 11c with two first support elements 11ha for the first bracing arm 9a, spaced apart from one another in the longitudinal direction G, and two further second support elements 11hb for the second bracing arm 9b, spaced apart from one another in the longitudinal direction G. Viewed in the longitudinal direction G, the first support element 11ha and the second support element 11hb are spaced apart from each other transversely in the mounting direction M. The sliding frame 11c is therefore designed as a double frame with a first storage location A1 for the first bracing arm 9a and a second storage location A2 for the second bracing arm 9b. The intermediate frame 11b and the sliding frame 11c are each structural units which can be fixed to a suitable base frame 11a.The leg-like support elements 11ha, 11hb (see FIG. 7) are each spaced apart from one another in the longitudinal direction G and are designed so that either the first bracing arm 9a or the second bracing arm 9b can be firmly placed thereon. The sliding frame 11c can be moved horizontally, linearly, in the mounting direction M relative to the intermediate frame 11b. From the center line GM, the sliding arm 11c can be moved to the right in a first direction R1 or to the left in a second direction R2. Thus, by means of the sliding frame 11c, the bracing arms 9a, 9b received therein can be oriented or spaced laterally relative to the receiving telescopic jib 6. Relative to the intermediate frame 11b, the sliding frame 11c can be moved laterally from a retracted receiving position to a preferably fully extended lowered position and a central fixed position. In the retracted receiving position, the symmetrical sliding frame 11c is centrally oriented relative to the base frame 11a or the intermediate frame 11b. In this case, the first support element 11ha on the right side is arranged slightly offset to the right with respect to the center line GM. The second support element 11hb is offset to the left accordingly. Basically, in the receiving position, it is also possible that the first or second support element 11ha, 11hb, respectively, is oriented centrally with respect to the center line GM. A hydraulic cylinder 11g is arranged between the base frame 11a and the sliding frame 11c to move the sliding frame 11c along the intermediate frame 11b. It is clear that the hydraulic cylinder 11g can be replaced by other suitable drives. In order to be able to move the first or second bracing arm 9a, 9b fully to the right or left in the first or second direction R1, R2 starting from the central [blank] and to be able to design the intermediate frame 11b and the sliding frame 11c in a simple manner, for the sliding frame 11c in the central receiving position, the first support element 11ha is arranged to the right of the centre line GM and is therefore already offset in the direction R1, and the second support element 11hb is arranged to the left of the centre line GM and is therefore already offset in the direction R2. Starting from the receiving position, the sliding frame 11c can be moved to the left or right relative to the base frame 11a as seen in the direction of the vehicle crane 2.This means that only the right first bracing arm 9a or only the left second bracing arm 9b can be moved successively by the sliding frame 11c to the lowered and fixed positions required for mounting on the right or left side of the basic box 6a. In the inner receiving position, one of the two bracing arms 9a, 9b, in this case the right first bracing arm 9a, is placed on the mounting frame 11 by the vehicle crane 2. The sliding frame 11c is shown in the left lowered position in Fig. 4 and has been moved in the second direction R2 for mounting the second bracing arm 9b. The sliding frame 11c is placed in the central receiving position for the next mounting step of receiving the first bracing arm 9a. In the lowered position, the first or second bracing arm 9a, 9b to be attached is moved laterally outward or outwardly to the right or outwardly to the left to such an extent that the telescopic jib 6 can be lowered next to or to the height of the bracing arms 9a, 9b without colliding with the respective bracing arms 9a, 9b. Then, from the lowered position, the bracing arms 9a, 9b can be moved in the direction of the telescopic jib 6 to a fixed position so that the bracing arms 9a, 9b abut against the basic box 6a and can be fixed in that position.

[0033] Furthermore, a pair of support legs 11d, the length of which can be varied in the vertical direction, are arranged at the rear end 11f (see FIG. 7). The two support legs 11d are arranged opposite each other and spaced apart from each other in the longitudinal direction G. The two support legs 11d together with the assigned holding frame 11i also form a structural unit which can each be fixed to a suitable base frame 11a. The support legs 11d can also be an integral part of the mounting frame 11.

[0034] After the mounting frame 11 has been fixed to the lower carriage 4, in a next rigging step one of the two bracing arms 9a, 9b is transported to the lower carriage 4. For this purpose, as is evident from FIG. 5, FIG. 5 shows a schematic and perspective view of the vehicle crane 2 and the second transport unit 3b shown in FIG. 1 with the first bracing arm 9a raised, the second transport unit 3b being initially oriented relative to the vehicle crane 2 such that its longitudinal direction is in an extended position relative to the longitudinal direction of the vehicle crane 2. As previously mentioned with reference to FIG. 2, in this case a distance remains between the vehicle crane 2 and the second transport unit 3b. Furthermore, the rear end 11f of the mounting frame 11 and the rear end 3d of the second transport unit 3b face each other in such a way that the loading surface 3c of the second transport unit 3b faces the vehicle crane 2. Alternatively, the vehicle crane 2 can also be oriented in a corresponding way relative to the second transport unit 3b. After orientation, in the next rigging step, only the first bracing arm 9a of the two bracing arms 9a, 9b is lifted from the second transport unit 3b by the vehicle crane 2. The first bracing arm 9a is lifted in a typical manner by hoisting the lifting cable 8, luffing the telescopic jib 6 or stretching the inner box 6b, or a combination of these. Before lifting, the lifting cable 8 is usually connected to the first bracing arm 9a. In this case, the transport frame 10 remains on the loading surface 3c of the first transport surface 3a in exactly the same way as the second bracing arm 9b. Then, after the first bracing arm 9a is fixed to the telescopic jib 6, the second bracing arm 9b is attached in a similar manner.

[0035] FIG. 6 shows the vehicle crane 2 shown in FIG. 5 in a schematic and perspective view in a subsequent rigged state. It is clear that the previously received first bracing arm 9a is now placed on the mounting frame 11, in particular on the two first support elements 11ha in its position. The lifting cable 8 has then been detached from the first bracing arm 9a. In this case, the first bracing arm 9a is provided with a foot 9f (see FIG. 7) in order to facilitate or enable the placement on the mounting frame 11. The first bracing arm 9a is thus supported on the first support element 11ha via the foot 9f. Basically, it is also possible not to provide the bracing arms 9a, 9b with feet, but only with stiffeners or guide surfaces, so that when placed in position, the bracing arms 9a, 9b directly cooperate with the support elements 11ha. The vehicle crane 2 is now available for further installation steps, in particular for the fastening of the first bracing arm 9a to the basic box.

[0036] FIG. 7 is a detailed perspective view of the mounting frame 11 with the first bracing arm 9a received. The first bracing arm 9a has already been moved from the inner / central receiving position, where the sliding frame 11c is located above the base frame 11a, to a right-side lowered position, where it is extended in the first direction R1, preferably completely along the middle frame 11b. When the first bracing arm 9a is in this lateral lowered position, the telescopic jib 6 can be lowered to a substantially horizontal receiving position, where the basic box 6a is located at the same height as the fixed frame 9e of the first bracing arm 9a. The first bracing arm 9a in the lowered position does not prevent the basic box 6a from lowering to the receiving position. For the lowering, a sufficient free space of at least 100 mm, at most 1000 mm, preferably 400 mm to 800 mm, is ensured between the basic box 6a and the first bracing arm 9a.

[0037] FIG. 8 shows a schematic perspective side view of the vehicle crane 2 with the telescopic jib 6 lowered to a horizontal receiving position. It is clear that the first bracing arm 9a extends almost parallel to the telescopic jib 6 and, as can be seen in the side view, the fixed frame 9e is arranged in front of the collar 6e of the basic box 6a. FIG. 8 and FIG. 7 also show that the inner box 6b has been moved back in order to lower the telescopic jib 6. The first bracing arm 9a is still in the lowered position, i.e. there is still a gap between the first bracing arm 9a and the telescopic jib 6 and the first bracing arm 9a is not yet fixed to the telescopic jib 6.

[0038] FIG. 9 shows an enlarged portion of the plan view of the first bracing arm 9a and the telescopic jib 6 shown in FIG. 8, with the first bracing arm 9a being arranged with its fixing frame 9e laterally adjacent and spaced apart from the collar 6e of the basic box 6a of the telescopic jib 6. The sliding frame 11c moves from the lowered position together with the first bracing arm 9a to the inside of the basic box 6a, with the fixing frame 9e abutting the collar 6e of the basic box 6a. The sliding frame 11c is then arranged with the first bracing arm 9a in a central fixing position. The first bracing arm 9a is then fixed to the basic box 6a, in particular by bolts. Then, by lifting the telescopic jib 6, the first bracing arm 9a is lifted from the mounting frame 11 and the vehicle crane 2 is ready to attach the second bracing arm 9b. The first bracing arm 9a remains in the applied mounting position extending approximately parallel to the telescopic jib 6.

[0039] Figure 10 is a more detailed perspective view of the mounting frame 11 on the vehicle crane shown in Figure 4. However, in comparison with the view of Figure 7, the sliding frame 11c with the second bracing arm 9b has moved from its receiving position above the base frame 11a to a lowered position extending to the left after receiving the second bracing arm 9b in its receiving position.

[0040] The second bracing arm 9b is further attached to the telescoping jib next to the first bracing arm 9a as described in detail with respect to the first bracing arm 9a in relation to Figures 5 to 9 .

[0041] FIG. 11 is a detailed perspective view of the mounting frame 11 with the first bracing arm 9a and the second bracing arm 9b shown in FIG. 7. The first bracing arm 9a is already fixed to the basic box 6a as described above. The second bracing arm 9b has also already been placed on the second support element 11hb (see FIG. 10) by the vehicle crane 2. In this case, the sliding frame 11c was in the retreated receiving position. The sliding frame 11c together with the second bracing arm 9b is then extended to the left in the direction R2 to the left lowered position. The telescopic jib 6 is then luffed down together with the already attached first bracing arm 9a to an approximately horizontal receiving position next to the second bracing arm 9b. In the next step, the sliding frame 11c together with the second bracing arm 9b moves from the lowered position to the forward central fixed position, in which the fixing frame 9e of the second bracing arm 9b abuts against the collar 6e of the basic box 6a. After that, the fixing frame 9e of the second bracing arm 9b is fixed to the collar 6e of the basic box 6a, in particular by a bolt, which means that the first bracing arm 9a and the second bracing arm 9b are fixed to the basic box 6a in time sequence.

[0042] FIG. 12 shows a schematic perspective view of the working state of the vehicle crane 2 with the bracing device 9 to which the two bracing arms 9a, 9b are attached. After the two bracing arms 9a, 9b are attached to the telescopic jib 6 as described above, the bracing arms 9a, 9b are erected and reinforced in a known manner. For this, in a first step, the bracing cables 12a are led from the respective tensioning mechanisms 9d through the deflection rollers 9i arranged at the tips 9c of the respective bracing arms 9a, 9b (see FIG. 9) to the telescopic jib 6d, where the bracing cables 12a are fixed. In a next step, a number of support rods 12b arranged one behind the other are arranged between the legs 6c of the telescopic jib and the tips 9c of the respective bracing arms 9a, 9b. Instead of the support rods 12, cables or chains or a combination thereof can also be used. The tension adjustment mechanism 9d is arranged under each of the bracing arms 9a, 9b, starting from the center of the longitudinal extension of the bracing arms 9a, 9b and offset in the direction of the fixed frame 9e. As mentioned above, the fixed frame 9e serves to fix the bracing arms 9a, 9b to the basic box 6a. The fixed frame 9e also has a double joint for erecting each of the bracing arms 9a, 9b relative to the basic box 6a by means of a raising cylinder 9g arranged between the fixed frame 9e and the bracing arms 9a, 9b, and also allows the bracing arms to be laterally pivoted to a V-shaped position by means of a rotating cylinder 9h arranged between the fixed frame 9e and the bracing arms 9a, 9b. The telescopic jib 6 is then lifted upwards together with the two bracing arms 9a, 9b. Next, the two bracing arms 9a, 9b are erected from the transport position to the telescopic jib 6 by the erection cylinder 9g so as to be almost parallel to the telescopic jib 6, and the two bracing arms 9a, 9b are spread out in a V-shape by the rotating cylinder 9h. Thus, the two bracing arms 9a, 9b are directed almost perpendicular to the basic box 6a and form an angle of about 60 degrees with respect to each other. The erection and rotation movements tension the bracing rod 12b. The bracing cable 12 is tensioned in parallel by the tension adjustment mechanism 9d.If necessary, the inner box 6b can be extended and the bracing cable 12a can be adjusted and tensioned via the tension adjustment mechanism 9d. The bracing cable 12a or the bracing rod 12b can also be connected to an additional counterweight. Such a bracing device 9 is also called Sideways Super Lift SSL.

[0043] In a step to complete the rigging procedure, the lifting cables 8 are then attached to the mounting frame 11, which is removed from the lower carriage 4 and temporarily stored in a suitable location or on the second transport unit 3b by the vehicle crane 2, after which the two bracing arms 9a, 9b are removed.

[0044] The bracing device 9 is removed from the telescopic jib 6 in the reverse order.

[0045] Firstly, the method of attaching the first bracing arm 9a and the second bracing arm 9b of the bracing device 9 to the telescopic jib 6 of the vehicle crane 2 and then the second variant of the mounting frame 11 used for this purpose will be described in more detail below.

[0046] FIG. 13 shows a schematic and perspective view of a vehicle crane system 1 with a vehicle crane 2 and a first transport unit 3a and a second transport unit 3b, respectively, installed on the ground surface U. The first transport unit 3a and the second transport unit 3b are typically designed as trailer trucks with trailers. Such a vehicle crane system 1 is necessary because the weight of the vehicle crane 2 itself is very high, so that the vehicle crane 2 must usually be driven to the respective installation site in a partially disassembled state in order to be able to comply with the maximum values ​​prescribed for the public road network regarding axle loads and vehicle weights. Therefore, further accessories of the vehicle crane 2, such as bracing devices 9 for increasing the load-bearing capacity of the vehicle crane 2, telescopic jib extensions, the entire telescopic jib 6 or counterweights, are often transported separately on the transport units 3a, 3b.

[0047] A road-going vehicle crane 2 typically comprises a multi-axle undercarriage 4 with pneumatically tyred wheels 5. On the undercarriage 4, a superstructure 7 is arranged, on which a telescopic jib 6 is mounted and which can be swiveled about a vertical axis relative to the undercarriage 4. The telescopic jib 6 has a basic box 6a attached to the superstructure 7 so that it can be levitated about a horizontal axis in the area of ​​the telescopic jib foot 6c of the telescopic jib 6 and receives a number of linearly telescopic inner boxes 6b, of which only the first one 6b is shown. On the free end of the telescopic jib 6, in particular on the telescopic jib 6d arranged on the innermost one of the inner boxes 6b, a lifting cable 8 runs, on which a load pick-up means, such as a load hook with a lower block for a cable reeving device, is suspended.

[0048] The two transport units 3a, 3b each have a loading surface 3c which is typically part of a low bed loader.

[0049] The mounting frame 11 is transported by the first transport unit 3a. The mounting frame 11 has a function of an auxiliary frame used when attaching the first and second bracing arms 9a, 9b to the telescopic jib 6. The mounting frame 11 mainly consists of a lower base frame 11a, preferably in the shape of a lattice-like mast section, a central intermediate frame 11b and an upper sliding frame 11c (see Figures 16 and 19), and serves to extend the lower carriage 4 and provide an option to temporarily store the two bracing arms 9a, 9b.

[0050] A bracing device 9 for the telescopic jib 6 is transported on the loading surface 3c of the second transport unit 3b as an attachment to the vehicle crane 2. Such a bracing device 9 is known to realize an increase in the load-bearing capacity of the vehicle crane 2, the installation of the rear and side struts of the telescopic jib 6 and a reduction in the elastic sagging of the telescopic jib 6 during the operation of the vehicle crane 2. For this purpose, the bracing device 9 is usually attached to the basic box 6a of the telescopic jib 6 and, in one variant of the embodiment, in the area of ​​the upper collar 6e. The bracing device 9 consists of a first bracing arm 9a and a second bracing arm 9b which are connected to the telescopic jib 6 and can be spread out backwards to a V-shaped up to the operating position. The first and second bracing arms 9a, 9b are also provided in the middle and lower areas, respectively, with tensioning mechanisms 9d in the form of cable winches for appropriately tensioning tensioning means such as the strut cables 12a and strut rods 12b (see FIG. 24) of the associated struts. On the second transport unit 3b, the two bracing arms 9a, 9b are in a transport position horizontal, parallel to each other and spaced apart. In the transport position, the two bracing arms 9a, 9b are oriented such that their longitudinal direction is substantially parallel to the longitudinal direction of the second transport unit 3b. Moreover, the two bracing arms 9a, 9b are preferably arranged as close as possible to each other on the loading surface 3c so as not to protrude laterally beyond the loading surface. In the mounting position of the two bracing arms 9a, 9b on the telescopic jib 6, the two bracing arms 9a, 9b are arranged in an operating position adjacent to each other, the distance between the two bracing arms 9a, 9b being greater than in the transport position and adapted to the width of the telescopic jib 6. The two bracing arms 9a, 9b are arranged on the loading surface 3c in a common transport frame 10 adapted to the shape of the two bracing arms 9a, 9b and fixed in this position for transport purposes.

[0051] FIG. 14 is a further schematic view of the vehicle crane 2 and the first transport unit 3a shown in FIG. 13. At the start of the so-called rigging procedure, during which the first bracing arm 9a and the second bracing arm 9b are attached to the telescopic jib 6, the first transport unit 3a is positioned relative to the vehicle crane 2 such that its longitudinal direction is in extension to the longitudinal direction of the vehicle crane 2. In this case, a distance remains between the vehicle crane 2 and the first transport unit 3a. Furthermore, in this case, the rear end 4a of the undercarriage 4, which is opposite the cab 4b of the vehicle crane 2, and the rear end 3d of the second transport unit 3b face each other, so that the loading surface 3c of the first transport unit 3a faces the vehicle crane 2. Alternatively, the vehicle crane 2 can be correspondingly oriented relative to the first transport unit 3a. In the next rigging step, after orientation, the mounting frame 11 is lifted from the loading surface 3c by the vehicle crane 2, allowing the first transport unit 3a to run.

[0052] In the next step, as shown in FIG. 15, which shows a schematic view of the mounting of the mounting frame 11 on the vehicle crane 2 shown in FIG. 14, it is clear that the mounting frame 11 is moved by the vehicle crane 2 into a fixed position on the rear end 4a of the lower carriage 4. In this coupled position, the front end 11e of the mounting frame 11 abuts on the rear end 4a of the lower carriage 4. The mounting frame 11 is lowered by the vehicle crane 2 so that the upper surface of the mounting frame 11 is approximately at the same level with the surface of the lower carriage 4 and thus the receiving surfaces of the two bracing arms 9a, 9b on the lower carriage 4 are expanded together with the mounting frame 11. In this coupled position, the mounting frame 11 is fixed to the lower carriage 4, in particular by bolting. A support leg 11d, the length of which can be varied, is also arranged at the opposite rear end 11f of the lower carriage 4 in order to support the free rear end 11f of the mounting frame 11 on the ground U. The vehicle crane 2 or its lifting cable 8 can then be removed from the mounting frame 11 and made available for the next installation step.

[0053] FIG. 16 is a detailed perspective view of the mounting frame 11 shown in FIG. 15, which is already fixed to the undercarriage 4 of the vehicle crane 2. In contrast to FIG. 15, in a further rigging step the lifting cables 8 have been removed from the mounting frame 11. The structure of the mounting frame 11 will be explained in more detail below with reference to FIG. 16. The mounting frame 11 essentially consists of a lower base frame 11a, a central intermediate frame 11b, only one upper sliding frame 11c and a support leg 11d. The base frame 11a has a lattice or frame structure and can have a triangular, rectangular or polygonal cross section. A lattice mast part of a telescopic jib extension with a triangular cross section can also be used. The base frame 11a has substantially the shape of a rectangular parallelepiped or a triangular prism. The base frame 11a also has a longitudinal direction G, which is oriented in extension with respect to the longitudinal direction L of the undercarriage 4 at the connection position of the mounting frame 11. The longitudinal direction G is therefore shown centrally relative to the symmetrical base frame 11a in FIG. 16 and also corresponds to the center line GM of the mounting frame 11. The length of the base frame 11a is selected so that the first and second bracing arms 9a, 9b can be placed on the mounting frame 11 one after the other in time, so that the vehicle crane 2 with its lowered telescopic jib 6, in particular its basic box 6a, can move next to the bracing arms 9a, 9b which are respectively raised. The intermediate frame 11b is fixed to the base frame 11a in a removable manner, preferably by clamps or screws, and after fixing in a fixed manner in position, and the intermediate frame carries a sliding frame 11c with two support elements 11ha arranged at a distance from each other in the longitudinal direction G for one of the two bracing arms 9a, 9b. The intermediate frame 11b and the sliding frame 11c are structural units which can each be fixed to the appropriate base frame 11a. The leg-like support elements 11ha are each spaced apart from one another in the longitudinal direction G and are designed so that one of the two bracing arms 9a, 9b can be securely placed thereon. The sliding frame 11c is horizontally, linearly, movable relative to the intermediate frame 11b in the mounting direction M and in a first direction R1, whereby the received bracing arms 9a, 9b can be laterally oriented or spaced apart relative to the receiving telescopic jib 6.The sliding frame 11c is therefore designed as a separate frame with only a single first storage location A1 for the first bracing arm 9a or the second bracing arm 9b, in each case arranged alternately in time. Relative to the base frame 11a, the sliding frame 11c can be moved by the intermediate frame 11b from a preferably fully retracted receiving position to a laterally preferably fully extended lowered position and a central fixed position. For this purpose, a hydraulic cylinder 11g is arranged between the base frame 11a and the sliding frame 11c. It is clear that the hydraulic cylinder 11g can be replaced by other suitable drives. In this fixed position, starting from the receiving position, the sliding frame 11c can only be moved to the right side, as seen in the direction of the vehicle crane 2, relative to the intermediate frame 11b. This means that, with the intermediate frame 11b in this right fixed position on the base frame 11a, only the right first bracing arm 9a can be moved from the sliding frame 11c to the lowered position and fixed position required for the installation on the right side of the basic box 6a. In the inner receiving position, one of the two bracing arms 9a, 9b, in this case the first bracing arm 9a on the right side, is placed on the mounting frame 11 by the vehicle crane 2. In the lowered position, the bracing arm 9a, 9b to be mounted is moved laterally outwards or to the right to such an extent that the telescopic jib 6 can be lowered next to or to the height of the bracing arms 9a, 9b without colliding with the respective bracing arm 9a, 9b. From the lowered position, the bracing arms 9a, 9b can then be moved in the direction of the telescopic jib 6 to a fixed position, where the bracing arms 9a, 9b abut against the basic box 6a and can be fixed in that position.

[0054] Furthermore, in Fig. 16 it can be seen that at the rear end 11f a pair of support legs 11d, the length of which can be changed in the vertical direction, are arranged. The two support legs 11d are opposite each other and spaced apart from each other with respect to the longitudinal direction G. The two support legs 11d together with the assigned holding frame 11i also form a structural unit which can each be fixed to a suitable base frame 11a. The support legs 11d can also function as part of the mounting frame 11.

[0055] After the mounting frame 11 is fixed to the lower carriage 4, in the next rigging step one of the two bracing arms 9a, 9b is transported to the lower carriage 4. For this, as is clear from FIG. 17, a schematic view of the vehicle crane 2 and the second transport unit 3b with the first bracing arm 9a shown in FIG. 13 raised is shown. From this figure, the second transport unit 3b is initially oriented relative to the vehicle crane 2 such that its longitudinal direction is in an extended position relative to the longitudinal direction of the vehicle crane 2. As previously mentioned with reference to FIG. 14, in this case a distance remains between the vehicle crane 2 and the second transport unit 3b. Moreover, in this case the rear end 11f of the mounting frame 11 and the rear end 3d of the second transport unit 3b face each other, so that the loading surface 3c of the second transport unit 3b faces the vehicle crane 2. Alternatively, the vehicle crane 2 may be oriented in a corresponding manner relative to the second transport unit 3b. After orientation, in the next rigging step, only the first bracing arm 9a of the two bracing arms 9a, 9b is lifted from the second transport unit 3b by the vehicle crane 2. The first bracing arm 9a is lifted in a typical manner by hoisting the lifting cable 8, luffing the telescopic jib 6 or stretching the inner box 6b, or a combination of these. Before lifting, the lifting cable 8 is usually connected to the first bracing arm 9a. In this case, the transport frame 10 remains on the loading surface 3c of the first transport surface 3a in exactly the same way as the second bracing arm 9b, and then, after the first bracing arm 9a is fixed to the telescopic jib 6, the second bracing arm 9b is attached in a similar way.

[0056] FIG. 18 shows the vehicle crane 2 shown in FIG. 17 in a schematic representation in a subsequent rigged state. It is clear that the previously received first bracing arm 9a is now placed on the mounting frame 11, in particular on the two support elements 11ha in its position. The lifting cable 8 has then been detached from the first bracing arm 9a. In this case, the first bracing arm 9a is provided with a leg 9f in order to facilitate or enable the placement on the mounting frame 11. The first bracing arm 9a is thus supported on the support element 11ha via the leg 9f. Basically, it is also possible not to provide the bracing arms 9a, 9b with legs, but only with stiffeners or guide surfaces, so that the bracing arms 9a, 9b directly cooperate with the support element 11ha when placed in position. The vehicle crane 2 is now available for further installation steps, in particular the step of fastening the first bracing arm 9a to the basic box 6a.

[0057] FIG. 19 is a detailed perspective view of the mounting frame 11 with the first bracing arm 9a shown in FIG. 16 received. The first bracing arm 9a is preferably moved from the inner / middle or left receiving position, in which the sliding frame 11c is located above the base frame 11a, to a right lowered position, fully extended along the middle frame 11b. When the first bracing arm 9a is in this lateral lowered position, the telescopic jib 6 can be lowered to a substantially horizontal receiving position, in which the basic box 6a is located at the same height as the fixed frame 9e of the first bracing arm 9a. The first bracing arm 9a in the lowered position does not prevent the basic box 6a from being lowered to the receiving position. For the lowering, a sufficient free space of at least 100 mm, at most 1000 mm, preferably 400 mm to 800 mm, is ensured between the basic box 6a and the first bracing arm 9a.

[0058] Figure 20 shows a schematic side view of the vehicle crane 2 with the telescopic jib 6 lowered to a horizontal receiving position. It can be seen that the first bracing arm 9a extends approximately parallel to the telescopic jib 6 and, as can be seen in the side view, the fixed frame 9e is located in front of the collar 6e of the basic box 6a. Figures 20 and 19 also show that the inner box 6b has been retracted in order to lower the telescopic jib 6.

[0059] After the telescopic jib 6 is lowered, the sliding frame 11c moves from the lowered position to the inside of the basic box 6a together with the first bracing arm 9a, and the fixing frame 9e abuts against the collar 6e of the basic box 6a. The sliding frame 11c is disposed at the central fixing position together with the first bracing arm 9a.

[0060] In FIG. 21, which shows an enlarged portion of the plan view of the first bracing arm 9a shown in FIG. 20, the first bracing arm 9a abuts laterally with its fixing frame 9e against the collar 6e of the basic box 6a of the telescopic jib 6. Here, the first bracing arm 9a is fixed to the basic box 6a, in particular by bolts. Then, by lifting the telescopic jib 6, the first bracing arm 9a is lifted from the mounting frame 11 and the vehicle crane 2 is ready to attach the second bracing arm 9b. The first bracing arm 9a remains in the applied mounting position extending approximately parallel to the telescopic jib 6.

[0061] FIG. 22 shows a more detailed perspective view of the mounting frame 11 on the vehicle crane 2 shown in FIG. 16. However, in contrast to the view in FIG. 16, the structural unit consisting of the intermediate frame 11b and the sliding frame 11c is fixed or screwed to the base frame 11a when it is swiveled 180° about an imaginary vertical axis. For this purpose, the intermediate frame 11b and the hydraulic cylinder 11g are previously removed from the base frame 11a, lifted together with the vehicle crane 2, swiveled 180° and then placed on the base frame 11a and fixed in place. Correspondingly, the sliding frame 11c can be moved from a left-hand receiving position on the base frame 11a to a laterally extended lowered position. FIG. 22 shows the sliding frame 11c in the lowered position.

[0062] After the intermediate frame 11b has pivoted together with the sliding frame 11c, a second bracing arm 9b can additionally be attached to the telescopic jib next to the first bracing arm 9a, as previously described in detail with respect to the first bracing arm 9a in connection with Figures 17 to 21.

[0063] FIG. 23 shows a detailed perspective view of the mounting frame 11 with the first bracing arm 9a and the second bracing arm 9b shown in FIG. 19. The first bracing arm 9a is already fixed to the basic box 6a as described above. The second bracing arm 9b is also already placed on the second support element 11ha by the vehicle crane 2. In this case, the sliding frame 11c is in the retreated receiving position. The sliding frame 11c then extends to the left together with the second bracing arm 9b and moves to the left lowered position. The telescopic jib 6 is then roughed down together with the already attached first bracing arm 9a to an approximately horizontal receiving position next to the second bracing arm 9b. In the next step, the sliding frame 11c moves inward together with the second bracing arm 9b from the lowered position to the central fixed position, in which the fixing frame 9e of the second bracing arm 9b abuts against the collar 6e of the basic box 6a. After that, the fixing frame 9e of the second bracing arm 9b is fixed to the collar 6e of the basic box 6a, in particular by means of a bolt, which means that the first bracing arm 9a and the second bracing arm 9b are fixed to the basic box 6a in a time sequence.

[0064] FIG. 24 shows a schematic perspective view of the working state of the vehicle crane 2 with the bracing device 9 to which the two bracing arms 9a, 9b are attached. After the two bracing arms 9a, 9b are attached to the telescopic jib 6 as described above, the bracing arms 9a, 9b are erected and reinforced in a known manner. For this, in a first step, the bracing cables 12a are respectively led from the tensioning mechanisms 9d through the deflection rollers 9i (see FIG. 21) arranged at the tip ends 9c of the respective bracing arms 9a, 9b to the telescopic jib head 6d, where the bracing cables 12a are fixed. Then, in a next step, a number of bracing rods 12b arranged one behind the other are arranged between the telescopic jib foot 6c and the tip ends 9c of the respective bracing arms 9a, 9b. Instead of the bracing rods 12, cables or chains, or a combination thereof, can also be used. The tension adjustment mechanism 9d is arranged under each of the bracing arms 9a, 9b, starting from the center of the longitudinal extension of the bracing arms 9a, 9b and offset in the direction of the fixed frame 9e. As mentioned above, the fixed frame 9e serves to fix the bracing arms 9a, 9b to the basic box 6a. The fixed frame 9e also has a double joint for erecting each of the bracing arms 9a, 9b relative to the basic box 6a by means of an erection cylinder 9g arranged between the fixed frame 9e and the bracing arms 9a, 9b, and also allows the bracing arms to be laterally pivoted to a V-shaped position by means of a rotation cylinder 9h arranged between the fixed frame 9e and the bracing arms 9a, 9b. The telescopic jib 6 is then lifted upwards together with the two bracing arms 9a, 9b. Next, the two bracing arms 9a, 9b are erected from the transport position to be approximately parallel to the telescopic jib 6 by the erecting cylinder 9g, and the two bracing arms 9a, 9b are spread out in a V-shape by the rotating cylinder 9h. Thus, the two bracing arms 9a, 9b are directed approximately perpendicular to the basic box 6a and form an angle of about 60 degrees with respect to each other. The erecting and rotating motions tension the bracing rod 12b.The bracing cables 12 are tensioned in parallel by the tension adjustment mechanism 9d. If necessary, the inner box 6b can be extended and the bracing cables 12a can be adjusted and tensioned via the tension adjustment mechanism 9d. The bracing cables 12a or the bracing rods 12b can also be connected to additional counterweights. Such a bracing device 9 is also called Sideways Super Lift SSL.

[0065] In a step to complete the rigging procedure, the lifting cables 8 are then attached to the mounting frame 11, which is removed from the lower carriage 4 and temporarily stored in a suitable location or on the second transport unit 3b by the vehicle crane 2, after which the two bracing arms 9a, 9b are removed.

[0066] The bracing device 9 is removed from the telescopic jib 6 in the reverse order.

[0067] In the above examples, a transport frame 10 was described in which the first and second bracing arms 9a, 9b are arranged together for transport on the second transport unit 3b. The transport frame 10 is preferably designed integrally for both bracing arms 9a, 9b and determines the distance between the two bracing arms 9a, 9b in the transport position on the second transport unit 3b. This transport frame 10 also remains on the second transport unit 3b when the two bracing arms 9a, 9b are transported to the vehicle crane 2 as part of the rigging procedure. It is also possible to separate the transport frame 10 into a first part for the first bracing arm 9a and a second part for the second bracing arm 9b. It is then possible to leave the first and second parts of the transport frame 10 on the second transport unit 3b or to transport them together with the first and second bracing arms 9a, 9b to the mounting frame 11. In the latter case, the first and second parts of the transport frame 10 are separated from the first and second bracing arms 9a, 9b, respectively, during the subsequent rigging process and remain on the mounting frame 11 until they are needed to move the two bracing arms 9a, 9b back to the second transport unit 3b. The sliding frame 11c of the mounting frame 11 has corresponding complementary support elements 11ha, 11hb for receiving the first and second parts of the transport frame 10. These support elements 11ha, 11hb are leg-shaped for receiving the first and second bracing arms 9a, 9b, respectively, and flat for receiving the respective parts of the transport frame 10.

[0068] In relation to the above-mentioned exemplary embodiment, the base frame 11a has been described as a lattice mast structure and as a lattice mast portion of a telescopic jib extension having a triangular cross section. However, the base frame 11a can have any type of lattice, box or frame structure and can have a triangular, rectangular or polygonal cross section. The base frame 11a, the support legs 11d and the holding frame 11i can also be combined to form a welded, connected or screwed component. In relation to the exemplary embodiment shown in Figures 1 to 12, the sliding frame 11c can also be fixedly welded, connected or screwed to the base frame 11a. [Explanation of symbols]

[0069] 1-unit crane system 2 Vehicle crane 3a First transport unit 3b Secondary transport unit 3c Loading surface 3d rear end 4 Lower Carriage 4a Rear end 4b Driver's seat 5th wheel 6. Telescopic Jib 6a Basic box 6b Inner box 6c Extendable Jib Foot 6d telescopic jib head 6e Color 7 Superstructure 8 Lifting Cable 9 Bracing device 9a First bracing arm 9b Second bracing arm 9c Tip 9f Tension adjustment mechanism 9e Fixed Frame 9f legs 9g upright cylinder 9h Pivot cylinder 9i Deflection roller 10 Transport Slots 10 Transportation support 11 Mounting frame 11a Base frame 11b Intermediate frame 11c Sliding frame 11d support leg 11e Frontend 11f Rear end 11g Hydraulic Cylinder 11ha First supporting element 11hb Second Support Element 11i Holding frame 12a Bracing Cable 12b Bracing rod A1 First storage location A2 Second storage location G Longitudinal direction GM center line L Longitudinal M Installation direction R1 First direction R2 Second direction U ground

Claims

1. A mounting frame (11) of a vehicle crane (2), characterized in that at least one bracing arm (9a, 9b) of a bracing device (9) of the vehicle crane (2) can be temporarily stored on the mounting frame (11), the mounting frame (11) comprises at least one displaceable sliding frame (11c), a single bracing arm (9a, 9b) can be temporarily stored on the sliding frame (11c), the mounting frame (11) comprises exactly one displaceable sliding frame (11c). The mounting frame (11) of the vehicle crane (2).

2. characterised in that, starting from a receiving position, the sliding frame (11c) can be displaced either in a first direction (R1) or in a second direction (R2) opposite to the first direction (R1) and back again. A mounting frame (11) according to claim 1.

3. characterised in that the sliding frame (11c) can be displaced in a mounting direction (M) and back again, the mounting direction (M) extending perpendicular to the longitudinal direction (G) of the mounting frame (11). A mounting frame (11) according to claim 1 or 2.

4. The mounting frame (11) comprises a base frame (11a), an intermediate frame (11b), and the sliding frame (11c), the intermediate frame (11b) being disposed on the base frame (11a), and the sliding frame (11c) being displaceably disposed on the intermediate frame (11b). A mounting frame (11) according to any one of claims 1 to 3.

5. characterised in that the intermediate frame (11b) and the sliding frame (11c) form a structural unit, which can be removed in a combined state from the base frame (11a) and, after pivoting, can be fixed to the base frame (11a) in such a way that, starting from the receiving position, preferably fully retracted, the sliding frame (11c) can be displaced only in a second direction (R2) opposite to the first direction (R1) and back again. A mounting frame (11) according to claim 4.

6. characterized in that only one single storage location (A1) for the first bracing arm (9a) or the second bracing arm (9b) is arranged on the sliding frame (11c). A mounting frame (11) according to claim 5.

7. a first storage location (A1) for the first bracing arm (9a) and a second storage location (A2) for the second bracing arm (9b) are arranged on the sliding frame (11c). A mounting frame (11) according to any one of the preceding claims.

8. A first support element (11ha) is arranged on the sliding frame (11c) in the first storage position (A1), and a second support element (11hb) is arranged on the sliding frame (11c) in the second storage position (A2). A mounting frame (11) according to claim 5.

9. A vehicle crane (2) equipped with a mounting frame (11) according to any one of claims 1 to 8, characterized in that the mounting frame (11) is fixed to the undercarriage (4) of the vehicle crane (2) in the extension of the undercarriage (4). Vehicle crane (2).

10. The mounting frame (11) is supported on the ground (U) via a support leg (11d) at a rear end (11f) remote from the lower carriage (4). A vehicle crane (2) according to claim 9.

11. The vehicle crane (2) comprises an undercarriage (4), an upper structure (7) and a telescopic jib (6), the telescopic jib (6) comprises a basic box (6a) having an extendable inner box (6b), a bracing device (9) having a first bracing arm (9a) and a second bracing arm (9b) can be mounted on the telescopic jib (6), and for mounting purposes, the first bracing arm (9a) and the second bracing arm (9b) can be placed one by one on the mounting frame (11). A vehicle crane (2) according to claim 9 or 10.

12. A method for mounting a bracing device (9) on a telescopic jib (6) of a vehicle crane (2) in particular according to any one of claims 9 to 11, comprising: Providing a first transport unit (3a) in the area of ​​the vehicle crane (2) with a mounting frame (11) that is received in the first transport unit (3a); Lifting the mounting frame (11) from the first transport unit (3a) by the vehicle crane (2); aligning the mounting frame (11) on an extension line of the lower carriage (4) of the vehicle crane (2); fastening the mounting frame (11) to the lower carriage (4) and removing the vehicle crane (2) from the mounting frame (11); Providing a second transport unit (3b) with the bracing device (9) in the area of ​​the vehicle crane (2), the bracing device (9) being received in the second transport unit (3b) and comprising a first bracing arm (9a) and a second bracing arm (9b); Lifting the first bracing arm (9a) from the second transport unit (3) by the vehicle crane (2); lowering the first bracing arm (9a) of the bracing device (9) onto the sliding frame (11c) of the mounting frame (11) at a first storage location (A1) by means of the vehicle crane (2); displacing the sliding frame (11c) in a first direction (R1) from a receiving position to a laterally extending lowered position; luffing down the telescopic jib (6) next to the first bracing arm (9a); a step of displacing the sliding frame (11c) from the lowered position in a direction opposite to the mounting direction (M) and the first direction (R1) to a central fixed position, in which a fixed frame (9e) of the telescopic jib (6) abuts against a basic box (6a) of the telescopic jib (6); Fixing the first bracing arm (9a) together with the fixing frame (9e) to the basic box (6a); repeating the above steps associated with the second bracing arm (9b) starting with raising the first bracing arm (9a) from the second transport unit (3b) by the vehicle crane (2) and associated with a second storage location (A2) on the sliding frame (11c) and in a second direction (R2). method.

13. A method for mounting a bracing device (9) on a telescopic jib (6) of a vehicle crane (2) in particular according to any one of claims 9 to 11, comprising: Providing a first transport unit (3a) in the area of ​​the vehicle crane (2) with a mounting frame (11) that is received in the first transport unit (3a); Lifting the mounting frame (11) from the first transport unit (3a) by the vehicle crane (2); aligning the mounting frame (11) on an extension line of the lower carriage (4) of the vehicle crane (2); fastening the mounting frame (11) to the lower carriage and removing the vehicle crane (2) from the mounting frame (11); Providing a second transport unit (3b) with the bracing device (9) in the area of ​​the vehicle crane (2), the bracing device (9) being received in the second transport unit (3b) and comprising a first bracing arm (9a) and a second bracing arm (9b); Lifting the first bracing arm (9a) from the second transport unit (3) by the vehicle crane (2); lowering the first bracing arm (9a) of the bracing device (9) onto the sliding frame (11c) of the mounting frame (11) by the vehicle crane (2); displacing the sliding frame (11c) in a first direction (R1) from a receiving position to a laterally extending lowered position; luffing down the telescopic jib (6) next to the first bracing arm (9a); a step of displacing the sliding frame (11c) from the lowered position in a direction opposite to the mounting direction (M) and the first direction (R1) to a central fixed position, in which a fixed frame (9e) of the telescopic jib (6) abuts against a basic box (6a) of the telescopic jib (6); Fixing the first bracing arm (9a) together with the fixing frame (9e) to the basic box (6a); - removing said intermediate frame (11b) and said sliding frame (11c) as a structural unit from said base frame (11a) in a coupled state, pivoting said structural unit and fixing it to said base frame (11a) in such a way that, starting from said receiving position, preferably fully retracted, said sliding frame (11c) can only be displaced in a second direction (R2) opposite to said first direction (R1) and back again; repeating the above steps relating to the second bracing arm (9b) starting with lifting the first bracing arm (9a) from the second transport unit (3b) by means of the vehicle crane (2) on the sliding frame (11c) and in a second direction (R2). method.

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