Guy system of telescopic boom of mobile crane and method thereof

Abstract

To simplify attachment or detachment of a guy support of a telescopic boom.SOLUTION: The present invention relates to a guy system for supporting a telescopic boom of a mobile crane, including two guy supports capable of being individually mounted on the telescopic boom, and a mounting device which includes two frame components each of which can be mounted with one of the guy supports and detachably fixed such that the guy supports are self-mounted on the telescopic boom to be fixed during conveyance. The present invention further relates to the mobile crane including the guy system and a method of self-mounting the guy supports of the guy system on the telescopic boom of the mobile crane by using the mounting device.SELECTED DRAWING: Figure 1a

Description

Technical Field

[0001] The present invention relates to a guying system for supporting a telescopic boom of a mobile crane, a mobile crane provided with such a guying system, a mounting device for such a guying system, and a method for self-installing a guy support of such a guying system, based on the premise described in claim 1.

Background Art

[0002] In the case of larger mobile cranes with longer telescopic booms, it is known to support the telescopic boom by guy supports arranged in a V-shape in order to increase the support load and lateral stability. This guy support is rotatably attached to the connecting part of the telescopic boom (known as the Y-guy). The guy support (also called the TY-frame) is typically rotatable about two axes, and as a result, they can pivot out of the mounting position placed on the telescopic boom and into their V-shaped operating position.

[0003] To meet the specified axle load, the guy supports usually have to be moved separately for transport on public roads and also have to be attached to the boom at the site of use. In this case, the guy support can be lifted, for example, by an auxiliary crane and brought to the mounting position on the telescopic boom. Similarly, it is known from the prior art to lift and arrange the guy support in a self-installing method by the mobile crane itself to be supported. Thus, a self-installing method is known from Patent Document 1, where two guy supports are first individually placed from the transport vehicle onto a special panel on the lower traveling body of the mobile crane to be supported. Subsequently, the telescopic boom is lowered between the two guy supports by laying it down and can be bolted to the guy support. However, this method is relatively complex and time-consuming because multiple lifting strokes and individual steps are required.

Prior Art Documents

[0004] [Patent Document 1] European Patent Application Publication No. 1342692 [Overview of the project] [Problems that the invention aims to solve]

[0005] Therefore, an object of the present invention is to simplify the attachment or removal of guy supports for this type of telescopic boom. This should be possible in as few steps as possible by the mobile crane itself that is to be supported. [Means for solving the problem]

[0006] This objective is achieved according to the present invention by a guy system having the features of claim 1, a mounting device according to claim 11, and the method according to claim 14. Advantageous embodiments of the present invention can be found in the dependent claims and the following description.

[0007] According to the proposal, a guy system for supporting the telescopic boom of a mobile crane is presented. This guy system comprises two guy supports that can be individually attached to the telescopic boom. Rather than being fastened or attached together as a unit to the telescopic boom, the guy supports are individually attached by corresponding connecting means. This results in a lighter weight than in solutions where the guy supports are attached to the telescopic boom as a unit connected, for example, by a mounting frame.

[0008] According to the present invention, the guy system further comprises a mounting device for self-attaching the guy support to a telescopic boom and for supporting the guy support during transport. The mounting device comprises two frame components, each of which one guy support can be positioned or attached and detachably fixed. The mounting device may optionally further comprise an adjustment unit, the frame components of which the guy supports fixed on the frame components are movable relative to each other.

[0009] The mounting device according to the present invention performs two functions. On the one hand, it constitutes a transport device for the safe transport of guy supports on an external transport vehicle. On the other hand, it enables the simple self-mounting of guy supports, which can be positioned on a mobile crane together with the mounting device in a single lifting stroke rather than multiple individual lifting strokes. For this purpose, there is no need to move the guy supports relative to or remove them from the mounting device; rather, they can be left in a fixed position on the mounting device. In this way, the transport and mounting device are integrated into a single unit.

[0010] By arbitrarily dividing the mounting device according to the present invention into frame components that can move further apart from each other, it becomes possible to position the two guy supports relative to each other, and thus change the overall width of the mounting device. Therefore, for mounting to a telescopic boom, the two guy supports must be at a certain distance from each other so that the telescopic boom can be lowered from the top between the guy supports. However, the resulting overall width of the mounting device may exceed the maximum width permitted for public road transport. The adjustment unit allows the frame components to be displaced relative to each other, thereby enabling the mounting device to achieve smaller transport, which is suitable for public road transport.

[0011] The mounting device can be designed as a frame or as a mounting frame. The mounting device is preferably symmetrical, and an adjustment unit allows the frame components to move perpendicular to the axis of symmetry.

[0012] According to possible embodiments, the mounting device cannot be attached to the telescopic boom. Therefore, no means are provided to secure the mounting device to the telescopic boom. When attaching or detaching the guy support, the mounting device functions solely to provide correct positioning relative to the telescopic boom and the alignment surface of the guy support. The guy support is attached individually and directly to the telescopic boom, and then the connection between the guy support and the mounting device is released. As a result, the mounting device does not contribute to the overall weight of the fixed telescopic boom itself, which increases the maximum support load. The mounting device can then be removed from the mobile crane or left on the mobile crane during crane operation.

[0013] In further possible embodiments, the mounting device can be moved by an adjustment unit from a mounting position to a transport position and vice versa. In the mounting position, the telescopic boom can be retracted or lowered from above between spaced-apart frame components, and as a result, oriented substantially parallel to the guy supports positioned on the frame components. Thus, the area between the frame components is open at the top and constitutes, so to speak, a receiving area for the telescopic boom. In the transport position, the overall width of the mounting device is smaller than in the mounting position. As a result, the overall width of the mounting device for road transport can be reduced so as not to exceed the maximum allowable width, and therefore no special transport is required.

[0014] The extension of the frame components, that is, the movement of the mounting device from the transport device to the mounting position, and the reverse process, can be performed on the transport vehicle or while the mounting device is fixed to a mobile crane.

[0015] According to further possible embodiments, the frame components are linearly, i.e., translatably, movable. In this case, it is preferable that the frame components are movable in a direction perpendicular to the longitudinal axis of the guy support when the guy support is attached to or fixed to the frame component. Thus, the frame components can move toward and away from each other within the adjustment unit, particularly within a common horizontal plane.

[0016] However, other directions and types of movement for frame components are also possible. For example, frame components may move along a sweep curve or arc, or they may be able to move linearly or diagonally upward / downward (i.e., not in a common plane). In this case, it is simply necessary to ensure that the overall width of the mounting device is smaller at the transport position than at the mounting position.

[0017] According to further possible embodiments, the mounting device comprises at least one guide means, particularly a guide rail or guide rod, along which the frame component is displaceable. The guide means preferably extend perpendicular to the longitudinal axis of the guy support when they are attached to or fixed to the frame component. One or more guide means may be provided for each frame component. The endpoint position of the frame component in its movement along the guide means (i.e., the mounting position and the transport position) can be specified by a suitable stopper.

[0018] In the case of a nonlinear movement path of a frame component, at least one guide means may have a corresponding nonlinear (e.g., curved or arc-shaped) shape. Guiding of the frame component along this type of path can be carried out by a corresponding mechanism, for example, using a slotted guide. However, linear movement of the frame component is preferred because it allows for a particularly simple design.

[0019] In further possible embodiments, the adjustment unit comprises at least one hydraulically, electrically, or mechanically actuated actuator that can displace frame components relative to one another. The actuator may be linearly or radially driven, for example. The actuator is preferably connected to the power system of the mobile crane. For example, a hydraulically actuated actuator (e.g., a hydraulic cylinder) may be connected to the hydraulic system of the mobile crane. Alternatively, the hydraulic actuator may be manually adjusted with a manual pump or by other means. An electrically actuated actuator can be connected to the mobile crane by a corresponding cable.

[0020] At least one actuator may be a hydraulic cylinder. This may be positioned parallel to the direction of movement of the frame components. Alternatively, at least one hydraulic cylinder may be positioned perpendicular to the direction of movement of the frame components and may be displaced by an adjustment mechanism, such as a rod system. In this case, other arrangements of the at least one hydraulic cylinder are also possible. The maximum stroke of the at least one hydraulic cylinder can form a stopper where the mounting device is in the mounting position. Alternatively or additionally, the adjustment unit may include a gear drive or a rack and pinion drive, and / or a cable mechanism.

[0021] According to further possible embodiments, the mounting device comprises fastening means for removably fastening to a mobile crane, particularly to the lower traveling body of the mobile crane. The lower traveling body may be provided with mounting surfaces having corresponding fastening means. These may be located in the area of ​​the operator's cab. For mounting the guy support, the mounting device is lifted by the mobile crane and, in particular, bolted onto the mounting surface using the fastening means. The fastening means are preferably located in the area below the mounting device. In addition to the fastening means, the mobile crane and / or the mounting device may be provided with positioning aids that facilitate mounting to the mobile crane and / or orientation of the mounting device. After the mounting device is fixed to the mobile crane, the telescopic boom can be lowered and positioned between the frame components. In this case, the guy support can be attached to the telescopic boom, and the connection of the guide support to the mounting device is released.

[0022] This allows the mounting device to be detached from the mobile crane again. It can also remain attached to the mobile crane while it is in use. When moving the mobile crane to a construction site, the mounting device remaining on the mobile crane during use is advantageous because it can serve as a mounting surface for the guy supports attached to the telescopic boom. Thus, the guy supports on both sides of the telescopic boom rest on and are supported by the frame components during movement, allowing for movement without additional transport constraints. Considering the impact during movement of the mobile crane, overloading of the connection between the telescopic boom and the guy supports is prevented. The guy supports fixed to the telescopic boom can be temporarily attached to the frame components as needed for movement at the construction site.

[0023] According to a further possible embodiment, the frame part comprises a base on which the guide support can be placed or attached and which can be removably fixed, and the base is designed such that in the placed or fixed state, the longitudinal axes of the guide supports are oriented parallel to each other. The base can be designed such that the guide support stays in place and / or does not slip due to its weight. Alternatively or additionally, a positioning aid may be provided, which enables or facilitates the accurate positioning or placement of the guide support on the base.

[0024] According to a further possible embodiment, the mounting device comprises fixing means by which the guide support can be removably fixed on the frame part. The fixing means may be fastening means that enable rapid and easy fixing or lashing of the guide support. Alternatively or in addition, the guide support can be bolted to the frame part. The fixing means may be arranged on the frame part.

[0025] The mounting device preferably comprises a plurality of stop elements for connection to the stop or load-bearing means of a mobile crane, by means of which the mounting device can be lifted. The stop elements are preferably arranged such that the mounting device is oriented horizontally during lifting, regardless of whether a guide support is fixed thereto.

[0026] Furthermore, the mounting device can comprise fastening means for engaging or fixing to a transport vehicle. These may also be fastening means that enable rapid fixing / detaching of the mounting device to / from the transport vehicle.

[0027] The present invention further relates to a mounting device for a guy system for self - mounting of a guy support on a telescopic boom according to the invention and for supporting the guy support during transport. In this case, of course, the same advantages and characteristics as those of the guy system according to the invention are obtained, and thus repeated explanations are omitted here. The mounting device can comprise fixing means for engaging or fixing the guy support on a frame part. Further, fastening means for engaging or fixing the mounting device on a transport vehicle may be part of the mounting device.

[0028] The present invention further relates to a mobile crane comprising a guy system according to the invention. The mobile crane further comprises a mobile lower running body, an upper structure rotatably mounted on the lower running body, and a telescopic boom mounted on the upper structure and capable of pivoting or oscillating. The telescopic boom comprises, in particular, a connecting part hinged to the upper structure so as to be pivotable about a horizontal axis, and one or more telescopic parts displaceably mounted therein.

[0029] The lower running body preferably comprises a wheeled chassis so as to be able to travel on a road. However, in principle, the guy system according to the invention or the mounting device according to the invention can also be used in the case of a mobile crane having a chassis running on rails. The mobile crane can further comprise a support device preferably comprising a plurality of extendable and / or oscillatable supports. When lifting the mounting device from a transport vehicle to a mounting surface on the mobile crane, the mobile crane may have to be supported by the support device. The mobile crane preferably comprises an upper structure ballast as well.

[0030] The guy support is preferably pivotably mounted, particularly bolted, to the collar of the connecting part. Further, the guy support is preferably pivotable about two axes respectively, and each is pivotable particularly by one hydraulic cylinder.

[0031] According to a possible embodiment, the lower traveling body includes fastening means to which a mounting device can be fastened. These are preferably arranged such that, after the telescopic boom is housed between the frame components of the mounting device in the mounting position, the fastening elements on the collar of the connecting portion are located in the area of ​​the corresponding fastening elements of the guy support.

[0032] The mounting device can preferably be attached to a mobile crane by fastening means, thereby remaining on the mobile crane during crane operation, and the attached guy supports can position or support the telescopic boom on the mounting device.

[0033] The present invention further relates to a method for self-attaching the guy support of the guy system according to the present invention to the telescopic boom of a mobile crane. The method includes the following steps.

[0034] In particular, a mounting device with a guy support fixed to it is prepared, which is transported by a transport vehicle separately from the mobile crane. The mounting device is lifted by the mobile crane itself. The mounting device is fastened to the lower traveling body of the mobile crane. Disconnect the guy support from the mounting device. Lower the telescopic boom to position it against the guy support, and In particular, each guy support is connected to the telescopic boom using bolts.

[0035] In this case, of course, the same advantages and characteristics as the apparatus according to the present invention are obtained, and therefore, at this point, repeated explanations are largely omitted.

[0036] The transport vehicle may be a tractor unit equipped with a semi-trailer having a corresponding transport surface, on which the mounting device can be fixed. When raising the mounting device with a mobile crane, it may be necessary to support the mobile crane with a support device and raise its wheels off the ground. Following the disconnection of the guy support from the mounting device, the telescopic boom can swing together with the guy support fixed on it.

[0037] Dismantling the guy support of the guy system according to the present invention from the telescopic boom is carried out substantially by performing the above steps in reverse order. That is, the telescopic boom is lowered, the guy support fixed on it is placed between the frame components so that the guy support rests on the corresponding part of the frame component (for this purpose, where the mounting device is in the mounting position), the guy support is fixed to the frame component, the connection of the guy support to the telescopic boom is released, especially the bolting, the telescopic boom is raised, the fastening of the mounting device to the mobile crane is released, the mounting device is raised by means of the mobile crane, and then the mounting device is placed on the transport vehicle.

[0038] In one possible embodiment of the mounting method, the mounting device is moved by an adjustment unit from a transport position with a reduced overall width to a mounting position where it can receive the telescopic boom from above, and by lowering it between the frame components, the telescopic boom is preferably oriented so that, after lowering, it is substantially parallel to the guy support attached to or fixed to the mounting device. In the case of disassembly, the mounting device is moved from the mounting position to the transport position, so that it can accommodate the maximum allowable overall width during transport.

[0039] According to further possible embodiments, after the guy support is installed, the mounting device remains on the lower travel body during crane operation, and as a result, the telescopic boom can be placed on or supported on the mounting device by the guy support fixed to the mounting device in order to move the mobile crane to the place of use.

[0040] Further features, details, and advantages of the present invention will become apparent from the embodiments described below with reference to the drawings. [Brief explanation of the drawing]

[0041] [Figure 1a] This is a perspective view of one embodiment of the mounting device according to the present invention, located in a transport position. [Figure 1b] This is a perspective view showing the mounting device shown in Figure 1a at the mounting location. [Figure 2a] This is a plan view of the mounting device shown in Figure 1a, with a guy support attached on top of it. [Figure 2b] This is a plan view of the mounting device shown in Figure 1b, with a guy support attached on top of it. [Figure 3] This is a side view of the mounting device, with a guy support attached on top. [Figure 4] This shows a transport vehicle including a guy support attached to a mounting device for road transport, with (a) being a side view, (b) a top view, and (c) a perspective view. [Figure 5] This is a side view showing one embodiment of a mobile crane according to the present invention, during the self-installation of the guy support when the mounting device according to the present invention is lifted. [Figure 6] This is a side view of the mobile crane shown in Figure 5, after the mounting device has been fixed to the lower traveling body. [Figure 7] These are side views showing the mobile crane described in Figures 5 and 6, which has a telescopic boom housed between guy supports attached to a mounting device. [Figure 8] Figures 5 to 7 show a mobile crane equipped with a prepared boom guiding. [Figure 9] This is a perspective view showing another embodiment of the mounting device according to the present invention, located in a transport position. [Modes for carrying out the invention]

[0042] Figures 1a and 1b are perspective views of the mounting device 10 of the guy system according to the present invention. In a preferred embodiment, the mounting device 10 is shown in the transport position in Figure 1a and in the mounting position in Figure 1b. Figures 2a and 2b are plan views of the mounting device 10 according to the present invention, along with the guy support 40 mounted thereon, in the transport position (Figure 2a) and the mounting position (Figure 2b). Figure 3 is a side view of the mounting device 10 with the guy support 40 attached.

[0043] As shown in Figures 1a and 1b, the mounting device 10 according to the present embodiment is designed as a frame or frame structure and may therefore also be called a transport and mounting frame 10. The mounting device 10 comprises a basic frame 11 on which two frame components 12 and 13 are mounted so as to be displaceable relative to each other. The mounting device 10 is designed to be axially symmetric, where the two frame components 12 and 13 have the same structure except for being left-right symmetric.

[0044] Each frame component 12, 13 comprises two opposing stands 16, 17, each having bases 14, 15 for the guy support 40 of the guy system according to the present invention. A fastening means 18, designed in this embodiment as a securing means, is provided on the stands 16, 17. The guy support 40 can be quickly and securely engaged or secured to the frame components 12, 13 by the fastening means 18. When engaged with the frame components 12, 13 (see Figures 2a and 2b), the longitudinal axes of the guy support 40 are oriented to be parallel to each other.

[0045] The mounting device 10 further includes an adjustment unit 20 that can displace the frame components 12 and 13 relative to each other. For this purpose, the two frame components 12 and 13 are displaceably attached to a guide means 22 formed as a guide rod, which, when fixed to the frame components 12 and 13, extends perpendicular to the axis of symmetry of the mounting device 10 or perpendicular to the longitudinal axis of the guy support 40.

[0046] The adjustment unit 20 includes an actuator designed in this embodiment as a hydraulic piston cylinder unit or hydraulic cylinder 24, which can displace the frame components 12 and 13 along the guide rod 22. The hydraulic cylinder 24 is positioned on a longitudinal support extending centrally along the mounting device 10 and extends perpendicularly to the direction of movement of the two frame components 12 and 13. The retraction and extension movements of the hydraulic cylinder 24 are converted by a rod system mechanism into synchronous movements of the frame components 12 and 13 that extend laterally to it. Each rod system mechanism comprises two rods 26 that are rotatably fastened to each of the frame components 12 and 13 and are also rotatably connected to the piston rod of the hydraulic cylinder 24 at different axial positions.

[0047] When the hydraulic cylinder 24 is fully extended, the two frame components 12 and 13 are at their minimum distance from each other and are in the transport position (see Figure 1a). When the hydraulic cylinder 24 is fully retracted, the frame components 12 and 13 assume their maximum distance from each other so that the mounting device 10 is in the mounting position (see Figure 1b). This allows the relative distance between the frame components 12 and 13, and therefore the relative distance between the two guy supports 40 when they are fixed onto the frame components 12 and 13 (see Figures 2a and 2b), to be adjusted steplessly by retracting and extending the piston rod of the hydraulic cylinder 24.

[0048] The principle of the adjustment unit 20 shown here represents only one possible embodiment, based on the hydraulic cylinder 24 and the swingable rod 26. Of course, other actuators and / or moving mechanisms can also be used to move the frame components 12, 13 (e.g., radial drive devices).

[0049] The actuator 24 can be manually operated and adjusted by a manual pump 30 (see Figure 1a). Alternatively, or in addition to this, the hydraulic cylinder 24 can be connected to and fixed to the hydraulic system of the mobile crane 1. For this purpose, the mounting device 10 may be equipped with a corresponding hydraulic connector having appropriate terminals.

[0050] Figure 4 shows an example of a transport vehicle 60 in three different views: (a) a plan view, (b) a side view, (c) a perspective view, and by means of separating the guy support 40 from the mobile crane 1 and transporting it on public roads. This is a tractor unit comprising a semi-trailer on which the mounting device 10 of the present invention, fixed and protected by securing means, is mounted on the transport surface. Of course, other fastening means can be used instead of the securing means.

[0051] The guy support 40 is fixed to a mounting device 10 that functions as a transport restraint or transport frame. The mounting device 10 is positioned in transport locations where the frame components 12, 13, and therefore the guy support 40, are at the minimum distance from each other (or at least less than the distance between the mounting positions). As can be seen in Figure 4(b), the mounting device 10 and the guy support 40 fixed to it do not protrude laterally beyond the semi-trailer in order to meet the maximum permissible transport width for public road traffic (e.g., 2.5 m).

[0052] Figures 5 to 8 show side views of an embodiment of a mobile crane 1 including the guy system according to the present invention at different positions or during different steps of the mounting method according to the present invention. The mobile crane 1 comprises a lower traveling body 2 having a wheeled chassis, a cab 5, a support device 7, a superstructure 3 attached to the lower traveling body 2 so as to be rotatable around a vertical axis, and a telescopic boom 4 attached to the superstructure 3 so as to be rotatable or oscillating around a horizontal axis by one or more oscillating cylinders 8. The telescopic boom 4 is oscillatingly attached to the superstructure 3 and includes a connecting section 4a to which a plurality of telescopic sections 4b are displaceably attached. The innermost telescopic section 4b includes a boom head 4c.

[0053] Figure 5 shows the mobile crane 1 during boom guy self-attachment after the mounting device 10 has been raised from the transport vehicle 60 along with the guy support 40. The mounting device 10 is connected to the stopping means 34 (e.g., a chain) of the mobile crane 1 at several stopping points and is oriented horizontally when lifted. In the area behind the driver's cab 5, the lower traveling body 2 is provided with a mounting surface 6 having fastening means 32, which allows the mounting device 10, which also has fastening means on the lower side, to be fixed or bolted to the lower traveling body 2.

[0054] Figure 6 shows the mobile crane 1 after the mounting device 10 has been fixed to the lower traveling body 2 together with the guy support 40. The stopping means 34 has been removed. Here, the mounting device 10 can be moved from the transport position to the mounting position by the adjustment unit 20, in such a way that the frame components 12 and 13 are moved away from each other together with the guy support 40. Alternatively, this process can be performed on the transport vehicle 60 after arriving at the place of use and before lifting. This process is necessary because if the spacing of the guy support 40 in the transport position is too small, the telescopic boom 4 will not be able to descend between the frame components 12 and 13 and / or the guy support 40.

[0055] At the mounting position, sufficient space is available between frame components 12 and 13. By lowering the telescopic boom 4, it becomes possible to store the telescopic boom 4 between the guy supports 40 so that it is positioned at substantially the same height as the guy supports 40 and oriented parallel to the guy supports 40 (see Figure 7).

[0056] This allows the guy support 40 to be connected to the telescopic boom 4. The guy support 40 is bolted to the collar of the connecting section 4a, where the collar and the corresponding connecting means of the guy support 40 are positioned side by side as shown in Figure 7, allowing the connection to be established in a simple and uncomplicated manner.

[0057] As soon as the guy support 40 is attached to the connecting portion 4a, the connection to the mounting device 10, i.e., the fixing to the frame components 12 and 13 by the fastening means (alternatively or additionally, the guy support 40 can also be bolted to the frame components 12 and 13), can be released. The connection between the mounting device 10 and the lower traveling body 2 is maintained. The telescopic boom 4 with the guy support 40 can now be swung, and the guy support 40 can be oriented.

[0058] As can be seen in Figure 8, the guy support 40 is oriented in its fixed position to be substantially perpendicular to the vertical axis of the telescopic boom 4, and although it is not visible in this figure, it is spread out in a V-shape (Y-guy). The guy support 40 is connected to the superstructure 3 by a first guy means 42 (a typical guy strut), while the boom head 4c is connected to the guy support 40 by a guy-shaped second guy means 44 that is guided by a guide pulley at the end of the guy support 40.

[0059] In this embodiment, the mounting device 10 remains on the lower travel body 2 while the mobile crane 1 is moving and can serve as a support device at the construction site. For this purpose, the guy support 40 is again positioned on or folded onto the telescopic boom 4, the telescopic boom 4 is lowered, and as a result the guy support 40 is placed on the bases 14, 15 of the frame components 12, 13. Thus the boom 4 is supported by the mounting device 10. As a result, the connection between the guy support 40 and the connecting part 4a is protected from overload during movement.

[0060] During disassembly, the telescopic boom 4 automatically repositions the guy support 40, positioning it correctly on the bases 14 and 15 of the frame components 12 and 13, allowing for easy re-establishment of its fastening to the mounting device 10. These positions of the guy support 40 remain unchanged for the fastening means 18 and are also fixed during updated transport, ensuring that the guy support 40 is correctly positioned for mounting on the frame components 12 and 13 during subsequent installation. Thus, the bolting between the guy support 40 and the connecting portion 4a can be easily re-established.

[0061] The mounting device 10 is generally not attached to a mobile crane 1 while it is moving on public roads.

[0062] The mounting device 10 can only be mounted on the mobile crane 1 in countries with higher permissible axial loads in public road traffic.

[0063] Figure 9 shows an alternative embodiment of the mounting device in which the frame components 12 and 13 cannot be displaced from one another. [Explanation of Symbols]

[0064] 1 Mobile crane 2 Lower running body 3 Superstructure 4. Telescopic boom 4a Connecting part 4b Telescopic part 4c boomhead 5 Driver's cab 6 Mounting surface 7 Support 8 Rocking cylinder 10 Mounting device (transport and mounting gantry) 11 Basic frame 12 Frame parts 13 Frame parts 14 Stand 15 Stand 16 Stand 17 Stand 18 Fixing means (binding means) 20 Adjustment unit 22 Guide means (guide rod) 24 Actuator (hydraulic cylinder) 26 Rod 28 Fastening means (binding means) 30 Manual pump 32 Fastening means 34 Stop means 40 Guide support 42 First guiding means 44 Second guiding means 60 Transport vehicle

Claims

1. A guy system for fixing a telescopic boom (4) of a mobile crane (1), comprising two guy supports (40) that can be attached separately to the telescopic boom (4), comprising: having two frame parts (12, 13) each of which can be fitted with and removably fixed to one of said guy supports (40); The guy support (40) is self-mounted on the telescopic boom (4) and includes a mounting device (10) for supporting the guy support (40) during transport. A guy system characterized by:

2. An adjustment unit (20) allows the frame parts (12, 13) to be moved relative to each other.

2. The guy system of claim 1.

3. The mounting device (10) cannot be attached to the telescopic boom (4).

2. The guy system of claim 1.

4. such that the mounting device (10) is oriented substantially parallel to the guy supports (40) disposed on the frame parts (12, 13), The telescopic boom (4) From a mounting position in which the frame is housed between the frame parts (12, 13) from above, The mounting device (10) can be moved by an adjustment unit (20) to a transport position which is smaller in width than the mounting position and vice versa.

2. The guy system of claim 1.

5. When the guy support (40) is attached to the frame parts (12, 13), It is linearly movable, preferably in a direction perpendicular to the longitudinal axis of the guy support (40).

2. The guy system of claim 1.

6. The mounting device (10) comprises at least one guide means (22), in particular a guide rail or a guide rod, The frame parts (12, 13) are displaceable along the guide means (22).

6. A guy system as claimed in claim 5.

7. The adjusting unit (20) comprises at least one hydraulically, electrically or mechanically actuable actuator (24), in particular a linear or radial drive; The actuator (24) is capable of displacing the frame parts (12, 13); The actuator (24) is preferably connectable to the power system of the mobile crane (1).

6. A guy system as claimed in claim 5.

8. The attachment device (10) comprises fastening means for releasably fastening to the mobile crane (1), in particular to the undercarriage (2) of the mobile crane (1).

2. The guy system of claim 1.

9. The frame parts (12, 13) include platforms (14, 15) on which the guy supports (40) can be placed and removably fixed, The platforms (14, 15) are configured such that, in a resting state, the longitudinal axes of the guy supports (40) are oriented parallel to one another.

2. The guy system of claim 1.

10. The mounting device (10) comprises a fastening means (18), The fastening means (18) allows the guy support (40) to be removably fastened to the frame parts (12, 13).

2. The guy system of claim 1.

11. A mounting device (10) for a guy system according to any one of claims 1 to 10.

12. A mobile undercarriage (2) having a wheeled chassis; an upper structure (3) pivotably attached to the lower running body (2); a telescopic boom (4) including a connecting portion (4a) swingably attached to the upper structure (3) and one or more telescopic portions (4b) displaceably attached to the connecting portion (4a); The guy system according to any one of claims 1 to 10, The guy support (40) is pivotally attachable to the collar of the connecting portion (4a). A mobile crane (1).

13. The lower running body (2) is provided with a fastening means for fastening the mounting device (10), Preferably, the attachment device (10) is mounted on the mobile crane (1) by the fastening means so that it can remain on the mobile crane (1) during crane operation; The telescopic boom (4) can be supported on the attachment device (10) by the attached guy supports (40). Mobile crane (1) according to claim 12.

14. A method for self-installing a guy support of the guy system according to any one of claims 1 to 10 to a telescopic boom (4) of a mobile crane (1), comprising the steps of: preparing a mounting device (10) to which a guy support (40) is fixed, the mounting device (10) being transported by a transport vehicle (60) separately from the mobile crane (1); The mounting device (10) is lifted by the mobile crane (1); The mounting device (10) is fixed to the undercarriage of the mobile crane (1); Disconnecting the guy support (40) from the attachment device (10); Lowering the telescopic boom (4) for positioning it against the guy support (40); Each of the guy supports (40) is connected to the telescopic boom (4). A method comprising:

15. The mounting device (10) is moved by an adjustment unit (20) from a transport position in which the overall width is reduced to a mounting position in which the telescopic boom (4) can be stored from above; Preferably, after the telescopic boom (4) is lowered between the frame parts (12, 13), Oriented substantially parallel to the guy support (40) secured to the mounting device (10).

15. The method of claim 14.

16. After the installation of the guy support (40) is completed, The mounting device (10) comprises: During crane operation, the crane remains on the undercarriage (2), As a result, in order to move the mobile crane (1) to a place of use, The telescopic boom (4) is supported by the guy supports (40) fixed thereto. Can be placed on said mounting device (10) 15. The method of claim 14.

17. After the installation of the guy support (40) is completed, The mounting device (10) comprises: During crane operation, the crane remains on the undercarriage (2), As a result, in order to move the mobile crane (1) to a place of use, The telescopic boom (4) is supported by the guy supports (40) fixed thereto. Can be placed on said mounting device (10) 16. The method of claim 15 .

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