Quick assembly head for telescopic jib and method for assembling the same

Abstract

The invention relates to an assembly head for a telescopic boom which can be split into an inner boom group and an outer boom group, which assembly head can be detachably assembled on an inner telescopic section of the outer boom group. The assembly head comprises a roller head with deflection rollers and a telescopic tube section arranged on the roller head, which telescopic tube section can be pushed from its end into the inner telescopic section and has a length which is significantly shorter than the length of the inner telescopic section. The invention also relates to a split telescopic boom having an assembly head according to the invention, a mobile crane having a telescopic boom according to the invention and a method for self-assembly of an assembly head according to the invention on an outer boom group of a telescopic boom.

Description

Technical Field

[0001] The present invention relates to an assembly head for a telescopic boom that can be split into two boom assemblies, such a split telescopic boom, a mobile crane having such a telescopic boom, and a method for assembling such an assembly head onto the telescopic boom. Background Technology

[0002] In large mobile cranes or travel cranes, telescopic crane booms with multiple telescopic sections movably supported on each other are typically used. To reduce the weight of road transport and thus comply with weight restrictions under road traffic permit regulations, multiple telescopic sections are usually removed and reinstalled at the point of use. The removable telescopic section refers to the inner telescopic section of the boom (also called the inner telescopic boom assembly or boom group), and therefore also includes the innermost telescopic section, which supports the roller head used for deflecting and winding the lifting cables.

[0003] The mobile crane with reduced capacity and the dismantled inner boom assembly were transported to the site of use separately. However, the mobile crane could not be used independently until the latter arrived at the site and the dismantled telescopic section was reinstalled on the boom (on the outer boom assembly), because without the roller head, there was no device for connecting and lifting loads. Therefore, it was also not feasible to independently or self-equip the mobile crane (to establish the crane from a transport state to a working state, for example, by installing other components removed for road transport, such as ballast containers, ballast plates, support devices, base plates, etc.). Summary of the Invention

[0004] Therefore, the object of the present invention is to create a possibility in the category of mobile cranes with detachable telescopic booms that can also be used for work by removing the inner wall frame assembly from the telescopic boom.

[0005] Accordingly, an assembly head for a telescopic boom that can be disassembled into an inner boom assembly and an outer boom assembly is proposed. This assembly head can be detachably assembled onto the inner telescopic section of the outer boom assembly. The assembly head according to the invention includes a roller head with deflecting rollers and a telescopic tube section arranged on the roller head. The telescopic tube section can be pushed into the inner telescopic section from its end (i.e., from the front) and has a length significantly shorter than that of the inner telescopic section.

[0006] Therefore, according to the invention, a quick-assembly head is also provided, which is constructed as a plug-in connector and includes the entire roller head. This quick-assembly head can be quickly and easily inserted into the inner telescopic section of the reduced telescopic boom, or the outer boom assembly. Thus, a mobile crane, reduced in weight for road transport purposes, can be used for work or lifting operations before the removed telescopic section is installed. These operations may include, for example, preparation work for a stand-alone mobile crane, or even complete self-assembly.

[0007] Specifically, the innermost telescopic section of the outer boom assembly is referred to as the inner telescopic section. However, in principle, it is also conceivable to attach the assembly head to multiple telescopic sections, for example, by pushing a telescopic tube section into the innermost telescopic section and connecting or bolting it to the innermost telescopic section and / or other telescopic sections surrounding it. Thus, for the portion of the boom with the assembled assembly head, only the shortened telescopic length is available.

[0008] The telescopic tube segment of the assembly head according to the invention has a length significantly shorter than each of the telescopic segments of the telescopic boom. The length of the telescopic tube segment is preferably less than half the length of the inner telescopic segment, and particularly preferably less than one-quarter of the length of the inner telescopic segment. The telescopic tube segment may also have a length similar to or substantially the same as that of the roller head (viewed along the longitudinal axis of the boom when the assembly head is fixed). Similarly, the length of the telescopic tube segment can be defined by the dimensions of the flange of the inner telescopic segment. Therefore, the length of the telescopic tube segment can be determined such that, when the assembly head is in the assembled state and the outer boom assembly is fully retracted, it extends only within the region of the adjacent flanges of the telescopic segments of the outer boom assembly, or at least does not significantly exceed this region.

[0009] Therefore, the fixed assembly head only contacts the inner telescopic section, or outer boom assembly, within a relatively small area at its end. This results in a low self-weight for the assembly head, which can be prepared, for example, before transport, for immediate use once the mobile crane arrives at the construction site. The assembly head is then disassembled again before the separately transported inner boom assembly is installed.

[0010] The expansion joint is constructed such that its outer contour substantially conforms to / corresponds to the inner contour of the inner expansion joint. Thus, the expansion joint rests against the inner side of the inner expansion joint and / or one or more support points.

[0011] Specifically, the telescopic tube section of the assembly head is not the telescopic section of the telescopic boom. This telescopic tube section is only used to guide and support or fix the assembly head to the inner telescopic boom, and after assembly, it cannot move or extend relative to the outer boom assembly or relative to the inner telescopic section.

[0012] In another embodiment, the roller head is provided with a connecting device that can be connected, particularly bolted, to the connecting device of the inner telescopic section. The connecting device of the inner telescopic section is preferably arranged on its flange. These connecting devices are preferably bolted points for establishing a releasable bolted connection. The connecting devices of the assembly head and the telescopic section are aligned, particularly by pushing the assembly head in or extending the inner telescopic section. Therefore, the force transmission between the assembly head and the surrounding telescopic section is carried out, particularly not through, or largely not through, the telescopic pipe section, but through the connection established by the connecting device, or particularly through the established bolted connection.

[0013] The connection device between the assembly head and the inner telescopic section can be constructed as described in patent DE 10 2015 001 619 A1, which is the connection device between the innermost telescopic section with the roller head and the telescopic section surrounding the innermost telescopic section.

[0014] In another embodiment, the roller head has a stop portion or a cable connection portion, on which an assembly cable for lifting the assembly head can be fixed. Preferably, the stop portion is located above the center of gravity of the assembly head when lifted. Thus, the assembly head is independently oriented to its assembly position when lifted.

[0015] In another embodiment, a guide element is provided that cooperates with a corresponding guide element of the inner telescopic section during the assembly of the assembly head to facilitate the introduction of the telescopic tube section into the inner telescopic section. Preferably, the guide element of the assembly head is arranged on the telescopic tube section. This facilitates the introduction or insertion of the telescopic tube section into the inner telescopic section such that, ideally, the telescopic tube section only needs to extend until the roller head touches the flange of the telescopic section after the assembly head has been raised to an appropriate height in the region before the end of the inner telescopic section. The guide element may be designed, and specifically has one or more bevels, which allow the assembly head to be correctly and accurately oriented when the telescopic tube section is introduced or when the guide element guides along with it. This enables simple and rapid self-assembly of the assembly head.

[0016] Preferably, the assembly head according to the invention is not constructed as a fully functional heavy-duty assembly head, and therefore has a lighter weight than such an assembly head. Thus, the assembly head and the outer boom assembly can be transported together without exceeding the maximum permissible weight. However, in principle, it is also conceivable that the assembly head according to the invention is constructed as a fully functional heavy-duty assembly head, and transported separately to the place of use if necessary.

[0017] The present invention also relates to a telescopic boom for cranes, particularly for mobile cranes, which can be split or disassembled into two boom assemblies. The telescopic boom according to the invention comprises an outer boom assembly, an inner boom assembly, and an assembly head according to the invention detachably mounted on the inner telescopic section. The outer boom assembly has a hinged section and at least one telescopic section movably or telescopically supported in the hinged section. The inner boom assembly has at least one additional telescopic section movably supported in the inner telescopic section of the outer boom assembly. The features and advantages described with respect to the assembly head according to the invention also apply to the telescopic boom having the assembly head.

[0018] The inner boom assembly (or the outermost telescopic section of the inner boom assembly) can be received by the inner telescopic section of the outer boom assembly. Both the outer and inner boom assemblies can contain two or more telescopic sections that are movably supported in each other or are telescopic.

[0019] In another embodiment, an assembly arm is provided that is fitted or can be fitted onto the outer boom assembly, preferably outside the articulated section, and the assembly arm can be moved from a transport position to an assembly position and vice versa. Alternatively, the assembly arm is attached or can be attached to other telescopic sections of the outer boom assembly besides the innermost telescopic section. In the assembly position, the assembly arm is used to self-assemble the assembly head according to the invention onto the inner telescopic section of the outer boom assembly. Conversely, for transport and, if necessary, during operation, the assembly arm is in the transport position, in which position the assembly arm preferably abuts against the telescopic boom or outer boom assembly. The inner telescopic section is preferably movable or mobile relative to the assembly arm. The assembly arm can be locked in the transport and / or assembly position.

[0020] The assembly arm is preferably mounted or can be mounted on a fixing device for a support member of a telescopic boom. Therefore, it can be, for example, a fixing device for a Y-shaped support member of a telescopic boom, which is securely connected to the hinged section. Thus, the connection points already provided on the boom for receiving the support member can be used to fix the assembly arm. These are formed to a sufficiently large size and are not occupied during the lifting and installation of the assembly head.

[0021] If the crane does not use the (Y-shaped) support, the assembly boom can even remain on the telescopic boom. The assembly boom must only be removed once the (Y-shaped) support is installed. However, it is also conceivable to modify the receiving components for the (Y-shaped) support so that they can simultaneously receive both the (Y-shaped) support and the assembly boom, thus allowing the assembly boom to remain in its assembled state even while the telescopic boom is supported. When using the (Y-shaped) support, the auxiliary crane used for its assembly / removal can be used simultaneously for installing / removing the assembly boom.

[0022] In another embodiment, the assembly arm is provided with a deflection roller that can guide an assembly cable for lifting the assembly head, wherein the assembly cable can be fixed to a stop portion of the assembly head.

[0023] In another embodiment, the rotation axis of the deflecting roller (at least in the transport position) is inclined relative to the longitudinal axis of the outer boom assembly or the inner telescopic section, i.e., not perpendicular or parallel, and / or the rotation axis of the deflecting roller is inclined relative to the longitudinal axis of the assembly arm, i.e., not perpendicular or parallel. Specifically, the deflecting roller may be offset or offset relative to the longitudinal axis of the assembly arm. Thus, one embodiment of the assembly arm is feasible, in which the deflecting roller does not extend beyond the contour of the outer boom assembly in the transport position. Furthermore, the rotation axis of the deflecting roller may be arranged perpendicular or nearly perpendicular to the longitudinal axis of the outer boom assembly in the assembly position.

[0024] In another embodiment, the assembly arm is pivotally supported on an outer boom assembly about an axis, which is preferably inclined relative to the longitudinal axis of the outer boom assembly, i.e., not perpendicular or parallel. This axis is specifically horizontally oriented when the outer boom assembly is oriented horizontally.

[0025] Alternatively, instead of a pivoting mechanism about a single axis, other mechanisms can be provided to allow the assembly arm to move between a transport position and an assembly position. For example, a toggle joint connection could be envisioned here. Furthermore, it is also conceivable to achieve the movement of the assembly arm between the transport and assembly positions via an actuator (e.g., a hydraulic cylinder).

[0026] In another embodiment, the assembly arm is positioned so that it does not extend beyond the vehicle's outer contour or outline during transport. This allows the assembly arm to be transported with a reduced-size mobile crane without requiring additional space. Furthermore, it is conceivable that in some or all use cases, the assembly arm can be held on the telescopic boom even during the operation of the mobile crane. This further accelerates and simplifies the assembly and disassembly process of the assembly head.

[0027] The present invention also relates to a mobile crane having a telescopic boom according to the invention. It obviously possesses the same advantages and characteristics as the telescopic boom or assembly head according to the invention, and therefore will not be described again here.

[0028] The present invention also relates to a method for assembling the assembly head according to the invention onto the outer boom assembly of the telescopic boom according to the invention by means of the following steps:

[0029] -Move the assembly arm from the transport position to the assembly position. - The assembly cable is guided or wound up by the deflection rollers of the assembly arm, and then connected to the assembly head. - Raise the assembly head to the height of the inner telescopic section by retracting the assembly cable. Connect the assembly head to the inner telescopic section, especially by bolting. -Loosen the assembly cable from the assembly head and remove the assembly cable from the assembly arm, and - Move the assembly arm from the assembly position to the transport position.

[0030] The next step is preferably to wind up the lifting cable by rotating the roller head and the load receiving device, especially the hook pulley.

[0031] The assembly head according to the invention can be independently attached to the outer boom assembly using the method according to the invention, without relying on external auxiliary devices such as an auxiliary crane. If the total weight of the mobile crane with the outer boom assembly and the assembled assembly head remains below the permissible weight limit for road transport, the assembly head can be self-assembled according to the method according to the invention before transport.

[0032] If the self-assembly method for the assembly head according to the present invention is supplemented with the step of lifting and assembling other crane components using the now-assembled assembly head, a method for self-assembling the entire telescopic boom and, if necessary, self-assembling a mobile crane is obtained. For this purpose, the assembly head must be constructed to be appropriately stable (e.g., constructed as a heavy-duty assembly head) to be able to lift the enormous weight of other crane components to be installed.

[0033] In one embodiment, the assembly head is fitted onto the outer boom assembly via a bolted connection established between the roller head and the inner telescopic section. However, alternatively or additionally, it may be bolted to another telescopic section of the outer boom assembly.

[0034] In another embodiment, before connecting the assembly head to the inner telescopic section, the inner telescopic section extends partially to receive or be inserted into the telescopic tube section of the assembly head. Specifically, the assembly cable contacts a cable connection point located above the overall center of gravity of the assembly head when it is in the suspended state. Thus, the assembly head automatically orients itself after being lifted, such that the telescopic tube section faces laterally toward the opening of the inner telescopic section after the assembly head has been raised to the height of the inner telescopic section. Therefore, the latter only needs to extend until the roller head contacts its flange. The bolted connection between the assembly head and the telescopic section can then be established. Attached Figure Description

[0035] Other features, details, and advantages of the invention will become apparent from the embodiments illustrated below with reference to the accompanying drawings. The drawings show: Figure 1 A perspective view shows an assembly head mounted on the outer boom assembly of a telescopic boom according to a preferred embodiment; Figure 2 The front view shows the data based on... Figure 1 Assembly head; Figures 3 to 7 The side view of the external boom assembly illustrates the various steps of the assembly method according to the present invention; and Figure 8 A three-dimensional diagram is shown with the following based on Figure 7 The outer boom assembly of the assembly arm in the transport position. Detailed Implementation

[0036] exist Figure 1 The figure shows a preferred embodiment of the assembly head 10 according to the invention, wherein the assembly head 10 is mounted on the outer boom assembly 20 of the telescopic boom of a mobile crane that has been disassembled for transport (i.e., split into an outer boom assembly and an inner boom assembly). Figure 2 A front view of the assembly head 10 fixed to the outer boom assembly is shown. The outer boom assembly 20 includes an articulated section 22 hinged to a mobile crane (not shown in detail) and two telescopic sections 24, 26 movably or telescopically supported therein, which are fully retracted. The innermost of the two telescopic sections 24, 26 is referred to hereinafter as the "inner telescopic section" 26.

[0037] The assembly head 10 (which may also be referred to as a quick assembly head) includes a complete roller head 12 and a short telescopic tube section 14. The roller head has an upper deflecting roller and a lower roller assembly for guiding or winding up the lifting cable (not shown). Figures 1 to 2 The expansion joint section is not visible because it is entirely within the inner expansion joint 26 (in Figure 3 and Figure 4 The telescopic pipe section 14 can be seen in the image.

[0038] The assembly head 10 is a plug-in connector that is attached to the outer boom assembly 20 by pushing the telescopic tube section 14 into the inner telescopic section 26 and then establishing a bolt connection between the roller head 12 and the inner telescopic section 26. For this purpose, the roller head 12 and the flange 27 surrounding the end opening of the inner telescopic section 26 each have connection devices 16, 28 configured as bolt points. This means that the force transmission between the assembly head 10 and the surrounding inner telescopic section 26 is not, or only partially, carried out through the telescopic tube section 14, but rather through the established bolt connections 16, 28.

[0039] The telescopic section 14 is significantly shorter than the telescopic sections 24 and 26 of the outer boom assembly 20, and is not a telescopic section. Instead, the telescopic section 14 is used to stably fix / support the assembly head 10 on / in the inner telescopic section 26. Therefore, in this embodiment, the telescopic section 14 has a length substantially equivalent to the length of the roller head 12, and thus extends only in the outermost end region of the inner telescopic section 26 in the assembled state. As a result, the assembly head 10 has only a relatively light self-weight and can generally be transported with the disassembled telescopic boom (i.e., in the state of being assembled on the outer boom assembly 20). In particular, the outer contour of the telescopic section 14 substantially corresponds to the inner contour of the inner telescopic section 26. The telescopic section 14 can contact the support portion of the inner telescopic section 26, on which the outer telescopic section of the inner boom assembly is supported in the assembled state.

[0040] Conversely, the additional telescopic section, not shown in detail here and referred to as the "inner boom assembly" (which is telescopically supported in the inner telescopic section 26 of the outer boom assembly 20 during the operation of the mobile crane and includes the innermost telescopic section with the boom head), is removed for the purpose of reducing weight for road transport and is transported separately to the place of use. The mobile crane, now stripped of its telescopic boom, can now be used independently for lifting operations (e.g., for preparation work for the self-assembly of the mobile crane) using the assembly head 10 according to the invention, even though the boom head of the inner boom assembly itself is not installed. The assembly head 10 is removed before installing the removed additional telescopic section.

[0041] Figures 3 to 7 The various steps of the method according to the invention for self-assembling the assembly head 10 according to the invention onto the outer boom assembly 20 are shown in the side view of the boom. The self-assembly method can be performed before or after transport to the place of use.

[0042] An assembly arm 30 is fixed to the articulated section 22 of the outer boom assembly 20. This assembly arm has a deflecting roller 32 at its end, which can rotate about a horizontal axis, and the assembly cable 40 can be guided around this deflecting roller. The assembly arm 30 is mounted to the fixing device 38 of the articulated section 20 via a bracket 36, to which the Y-shaped support of the telescopic boom can be attached. Therefore, it is unnecessary to provide an additional receiving component for the assembly arm 30 on the articulated section 22. The Y-shaped support is also not used during the assembly and use of the assembly head 10, allowing for easy access to the fixing device 38. If the support is not required, the assembly arm 30 can even remain on the articulated section 22. Similarly, the assembly arm 30 can be removed after the assembly head 10 has been put into use.

[0043] As in Figure 8As can be seen, the assembly arm 30 can pivot about a pivot axis 34 inclined toward the longitudinal axis of the hinge section 22 between a transport position and an assembly position, in which the assembly arm rests against the hinge section 22 (see [link]). Figures 7 to 8 In the assembly position, the assembly arm can be used to lift the assembly head 10 (see...). Figures 3 to 6 The deflecting roller 32 is arranged to be laterally offset relative to the bracket 36, and the axis of rotation of the deflecting roller 32 is inclined relative to the longitudinal axis of the assembly arm 30. Due to this offset, the deflecting roller 32 is located beside the hinge section 22 in the transport position, so that the entire assembly arm 30 does not or substantially does not exceed the outline of the outer boom assembly 20 (see...). Figure 7 And in accordance with the dimensions permitted for mobile work machinery in public road traffic. In the assembly position, the axis of rotation of the deflecting roller 32 is substantially perpendicular or nearly perpendicular to the longitudinal axis of the articulated section 22, and the assembly arm 30, together with the deflecting roller 32, extends forward beyond the end of the retracted outer boom assembly 20.

[0044] The assembly head 10 has a cable connection portion 13, which is arranged such that it is positioned above the center of gravity of the assembly head when it is in a lifted or suspended state. Thus, the suspended assembly head 10 will automatically and correctly orient itself in the air so that the telescopic tube section 14 faces the inner telescopic section 26 (see...). Figure 4 ).

[0045] In the first step of the self-assembly method ( Figure 3 The assembly boom 30 pivots (and latches if necessary) into the assembly position, the assembly cable 40 is guided around the deflection rollers and secured to the cable connection 13 of the assembly head 10. The assembly head 10 is located on a transport vehicle 50 (which travels to the site of use, for example, to install the assembly head on-site; alternatively, the assembly head may be pre-installed before road transport and transported along with a mobile crane) and can now be lifted by retracting the assembly cable 40. No auxiliary crane or other external tools are required for this; the lifting mechanism is located on the boom assembly 20 itself.

[0046] Figure 4 The hoisted assembly head 10 is shown after being raised to the height of the inner telescopic section 26. The telescopic section 14 is self-orienting towards the opening of the inner telescopic section 26. To facilitate the introduction of the telescopic section 14 into the inner telescopic section 26, a guide element 18 is arranged on the telescopic section 14, which works in conjunction with the guide elements (e.g., slide rails, etc.) of the inner telescopic section 26, which are not shown here.

[0047] In the next step, the inner telescopic section 26 extends until the roller head 12 of the assembly head 10 strikes the flange 27 of the inner telescopic section 26. Figure 5Now the bolting of the connecting devices 16 and 28, which are guided together, can be established.

[0048] The support portion in the flange of the telescopic section 26 receives the telescopic tube section 14 in an existing support device for the inner telescopic section. However, this receiving portion is annular and strip-shaped, and can only withstand forces in a plane perpendicular to the telescopic section.

[0049] By according to Figure 4 The bolts 16 and 28 (which must be large enough) can withstand all forces in other directions. Additionally, a stop can be provided that directs the force along the longitudinal direction of the telescopic boom directly from the assembly head 10 into the flange of the telescopic section 26.

[0050] Figure 6 The assembled assembly head 10 is shown after the assembly cable 40 has been released and removed or withdrawn from the assembly arm 30, and after the inner telescopic section 26 has been fully retracted again. The assembly arm 30 is then folded (and latched if necessary) to the transport position. Figure 7 After that, and after lifting the cable on the deflection roller and hook pulley rollers on the winding roller head 12, the assembly head 10 is ready for use. The assembly head 10 is disassembled in the reverse order of the steps described above.

[0051] List of reference numerals in the attached diagram: 10 Assembly Head 12 roller heads 13 Stopping points 14 Expansion Pipe Section 16 Connecting devices 18. Guiding elements 20 external boom assembly 22. Articulated section 24 expansion joints 26. Internal expansion joint 27 Flange 28 connecting devices 30 Assembly Arm 32 deflection rollers 34 Pivot axis 36 supports 38 Fixture 40 Assembly Cable 50 transport vehicles

Claims

1. A telescopic boom for a crane, the telescopic boom being disassembleable into two boom assemblies, and including an outer boom assembly and an inner boom assembly, the outer boom assembly having a hinged section and at least one telescopic section movably supported in the hinged section, the inner boom assembly having at least one additional telescopic section movably supported in the inner telescopic section of the outer boom assembly, the assembly head being detachably mounted on the inner telescopic section. in, An assembly arm is provided, which is mounted on the outer boom assembly, and the assembly arm is capable of moving from the transport position to the assembly position, and from the assembly position to the transport position. The assembly head includes a roller head with deflecting rollers and a telescopic tube section arranged on the roller head. The telescopic tube section can be pushed into the inner telescopic section from its end and has a length significantly shorter than that of the inner telescopic section. The assembly arm has a deflection roller that guides an assembly cable for lifting the assembly head. The assembly cable can be fixed at a stop portion of the assembly head.

2. The telescopic boom according to claim 1, characterized in that, The assembly arm is mounted on the hinge section.

3. The telescopic boom according to claim 1, characterized in that, The assembly arm is mounted on a fixing device for the support member of the telescopic boom.

4. The telescopic boom according to claim 1, characterized in that, The crane in question is a mobile crane.

5. The telescopic boom according to any one of claims 1 to 4, characterized in that, The telescopic pipe section is not the telescopic section of the telescopic boom.

6. The telescopic boom according to any one of claims 1 to 4, characterized in that, The roller head has a connecting device that can be connected to the connecting device of the inner telescopic section.

7. The telescopic boom according to claim 6, characterized in that, The connecting device can be bolted to the connecting device of the inner telescopic section.

8. The telescopic boom according to claim 6, characterized in that, The connecting device of the inner telescopic section is arranged on the flange of the inner telescopic section.

9. The telescopic boom according to any one of claims 1 to 4, characterized in that, The roller head has a stop portion, and the assembly cable for lifting the assembly head can be fixed at the stop portion.

10. The telescopic boom according to claim 9, characterized in that, The stop portion is positioned above the center of gravity of the assembly head when it is lifted.

11. The telescopic boom according to any one of claims 1 to 4, characterized in that, A guide element is provided on the telescopic tube section, which cooperates with the guide element of the inner telescopic section during the assembly of the assembly head to facilitate the introduction of the telescopic tube section.

12. The telescopic boom according to any one of claims 1 to 4, characterized in that, The rotation axis of the deflecting roller is not perpendicular to or parallel to the longitudinal axis of the outer boom assembly, and / or is not perpendicular to or parallel to the longitudinal axis of the assembled arm.

13. The telescopic boom according to any one of claims 1 to 4, characterized in that, The assembly arm is pivotally supported on the outer boom assembly about its axis.

14. The telescopic boom according to claim 13, characterized in that, The axis is not perpendicular to or parallel to the longitudinal axis orientation of the outer boom assembly.

15. The telescopic boom according to any one of claims 1 to 4, characterized in that, The assembly arm will not extend beyond the outer contour of the outer boom assembly in the transport position.

16. A mobile crane having a telescopic boom according to any one of claims 1 to 15.

17. A method for assembling an assembly head onto an outer boom assembly of a telescopic boom according to any one of claims 1 to 4 and 12 to 15, comprising the following steps: a) Move the assembly arm to the assembly position. b) Guide the assembly cable via the deflection rollers of the assembly arm, and connect the assembly cable to the assembly head. c) Lift the assembly head to the height of the inner telescopic section. d) Connect the assembly head to the inner telescopic section. e) Loosen the assembly cable from the assembly head and remove the assembly cable from the assembly arm, and f) Move the assembly arm to the transport position.

18. The method according to claim 17, characterized in that, The assembly head is bolted to the inner telescopic section.

19. The method according to claim 17 or 18, characterized in that, The assembly head is bolted to the outer boom assembly by establishing a connection between the roller head and the inner telescopic section.

20. The method according to claim 17 or 18, characterized in that, Perform the following steps before step (d): The inner telescopic section is partially extended to receive the telescopic tube section of the assembly head.

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