EP0370314A2 - Mobile antenna assembly with a telescopic mast - Google Patents

Abstract

A mobile antenna assembly has a telescopic supporting mast, associated with which are front and rear arms designed as a two-part supporting structure which can be brought into an optimum support position from a transport position keeping within the dimensions of a container. For this, the section of the arm bearing the support cylinder is pivotable by means of a horizontally arranged joint in relation to the section connected to the basic frame. In this arrangement, retraction is by means of the bracing wire which is guided in a wire pulley, which is arranged on the section like a pendulum and forms the top end of the support cylinder or of the section, while extension is effected under own weight. During extension, the section is guided by the bracing wire which also runs out. The pivoting out of the arms is effected by means of radius struts, with which hydraulic cylinders are associated, which at the same time ensure that the necessary service walkways are also extended or folded out. The procedure is reversed for folding in, the section of the arms bearing the support cylinder being, as already mentioned, also folded in by means of the bracing wire and then secured. <IMAGE>

Description

The invention relates to a mobile antenna system with a telescopic mast, which is arranged foldable on a base frame with a base area corresponding to that of a container, the base frame having laterally fold-out cantilevers which are provided at their outer ends with support cylinders and base plates which are supported on the base.

Such antenna systems have mobile carriers, mostly trucks. They can be set up with these or separately. Because of their height, the telescopic masts have to be supported laterally and anchored, for which purpose they are assigned pivotable brackets which, according to DE-OS 32 01 067, are designed as telescopic support legs. These known antenna systems can only carry small weights, especially in the area of the top of the mast, and are therefore of limited use. In addition, the telescopic design of the support legs means that there is a high manufacturing outlay and thus correspondingly high investment costs. The same applies in principle to the antenna mast known from DE-OS 17 59 192.3-25, which is supported accordingly via a trestle of support legs and, in addition, via a support reaching down to the ground in order to achieve greater stability. Here too, as mentioned, only limited loads can be attached to the mast.

Antenna systems are also known from the prospectus of the applicant W 477 f / sp. 285,500 H. According to Figs. 9738 and 44328, they have laterally pivotable booms that have vertical support cylinders at the ends, against which the booms can be braced on the ground. Movable operating bars are attached to the chassis of the carrier vehicle or to the base frame of the mast. The disadvantage of this known system is that it is a must have certain ground clearance because the cantilevers are designed as sloping beams or structures on which the vertical support cylinders are arranged at the ends. This means that such a system cannot be moved in the manner of a container by such carrier vehicles, but rather must be tailored to such a vehicle in order to ensure the necessary ground clearance in any case. Partial dismantling is even necessary for transport by rail or ship.

Another antenna system with a telescopic mast that can be supported by side arms can be found in the same brochure (51243, 51238). This system has a base frame on which the swing-out booms are articulated via an inclined axis. As a result, it is possible to pivot the arms which have the extendable support feet at the ends up to the height of the base frame, so that overall favorable dimensions result. However, the known antenna system is only intended for relatively light units and is equipped with support feet and brackets which can be extended by hand. With larger systems, the jib ends would protrude very far or cannot be folded in unhindered. In both systems, the mast is not braced, which means that e.g. Enable directional antennas.

From DE-OS 31 05 149.9-25 a stiff four-link system is known, but used there as a support device for excavators and cranes. This four-bar system cannot be equated with articulated struts, especially since it is much more complex to build and does not save sufficient space even when it is closed. Furthermore, a support bracket for construction machinery is known from DE-GM 76 39 621, in which a type of support cylinder can be pivoted from the vertical into the boom itself. Here However, the boom is designed as a telescopic beam and the support cylinder itself can be pivoted about an articulation, so that overall a relatively complex, but not seen from the support cylinder, stable design results which requires a complex telescopic boom. Both known systems have a very small and therefore unsatisfactory projection for antenna systems.

The invention has for its object to provide an antenna system with container-like dimensions, which is inexpensive to transport, easy to set up and dismantle and has great stability thanks to wide cantilever arms, which are designed so that the antenna system even in extremely uneven terrain is to be set up.

The object is achieved in that the front and rear booms are designed as a two-part structure, the outer section, which supports the support cylinder, can be pivoted via a horizontally arranged joint relative to the inner section connected to the base frame and has a rope pulley via which a tension cable which can be actuated by a cable winch assigned to the supporting structure is guided to the mast head, and that both sections of the front and rear brackets are each connected as a whole to the base frame via an articulated strut, each of the articulated struts being able to be folded in and out again via an associated hydraulic cylinder.

Such an antenna system can therefore be transported in a container-like manner because the laterally extendable or swing-out booms can be folded up and raised from a stable lattice structure, for example, in such a way that they can be arranged above the base frame or above the loading area of the carrier vehicle even when retracted. Advantageously, when Moving the jib together uses the tensioning cable, since it is guided on the foldable section of the jib via a cable pulley and thus causes this section to swivel in. At the same time, the boom itself is hydraulically swung in and out using a kink strut. Thus, such an antenna system, apart from the extension of the mast, can itself be installed in a very short time so that a correspondingly high mast can then be extended without the risk that it is endangered by the wind or other loads and above all, that it can be safely used for directional radio operations due to the guying. The antenna system according to the application thus has pivotable cantilevers which can be pivoted so high and so that the entire retracted system can be easily transported or transported on a carrier vehicle in terms of containers. Advantageously, these brackets enable a secure stand even when the floor is extremely uneven and the antenna is aligned securely.

According to an expedient embodiment of the invention, for better and safer assembly and disassembly, it is provided that the front and rear arms connected to the base frame are associated with control bars which have links with which the control bars can be pivoted with respect to the base frame. The articulated struts and / or the section of the boom are expediently connected to the swiveling operating webs or the links leading them via coupling rods. It is thus advantageously possible to fold down the operating webs that are important for assembly and disassembly at the same time as the booms are swung out, or to pull them out in the case of another design, which can then be used by the operating personnel during the further extension and stabilization of the booms. These operating webs are mainly used to operate the waveguide drums, the pressure rod locks, the antenna assembly and also in emergency operation are required. Overall, it is possible in this way to provide a relatively simple system of operating bars on the sides of the carrier vehicle, especially since the operating bars can be designed as such in an aluminum hollow profile construction. Since they can be swiveled out simply and securely and can also be swiveled in again when the booms are retracted, they can perform further functions, the invention providing for this purpose that they serve to protect the attachments, in particular the waveguide, during transport.

A particularly expedient embodiment of the invention provides that the section of the front and rear brackets supporting the support cylinder is formed to form a grid triangle consisting of the base strut and support struts, to the base strut of which the support cylinder is attached and in the node formed by the support struts the horizontally arranged joint and the rope pulley is arranged at the junction point opposite the jib foot. This is a cheap and easy way to bring the support cylinder together with the section supporting it into the swiveled-in position when pulling in the tensioning cable or, conversely, to unfold it because of its own weight, since the tensioning cable then releases this possibility. The hinge is attached so that the folding of the section supporting the support cylinder is also ensured due to its own weight, for which purpose it is provided, as explained, at the corresponding node, namely at the node of the lattice triangle formed by the support struts.

In order to be able to apply the necessary support forces by extending the support cylinder, the section supporting the support cylinder must be fixable relative to the section pivotably attached to the base frame. This is achieved in that on the cable pulley carrying Node of the lattice triangle is a pivoted bar guided in the section connected to the base frame and lockable in the extended position. This bar is pulled out when the grid triangle is folded down and can then be locked in the end position so that the necessary supporting forces can be transferred without problems. The bar is advantageously locked in that the segment connected to the base frame is assigned a segment lock which can be pivoted via a spindle in front of the beam, the bar having interlocking bolts and hooks at the free end and the segment in the locked state. Through the corresponding bolts, it is simultaneously possible to fasten both sections of the boom to one another in the retracted or in the transport state by hooking them in such a way that they also make it possible to transport them independently of the tensioning cable, since they are directly connected to one another. When swinging out and loosening the tensioning cable or pulling out the tensioning cable from the winch, this securing is then released and the section carrying the support cylinder can fold down, in order then, as described, to be securely blocked by the beam.

An embodiment of the invention which is advantageous for protecting the rope as such provides that the rope winch assigned to the base frame is designed as a hydraulically driven friction winch. Since the ropes perform an extremely important function due to the forces to be taken over by them, they are secured accordingly, especially by applying an appropriate coating. This coating is retained because the friction winch works gently. In addition, it is advantageously provided that the guy rope pretensioning force of all friction winches is jointly monitored and hydraulically controlled. During operation of the mast or the associated antenna system, care is taken to ensure that the guy ropes are each subjected to a uniform tightening force or pretensioning force. Since all four friction winches are connected at the same time and apply the same pressure, a uniform protection of the mast is guaranteed without additional measures being necessary.

The folding of the section supporting the support cylinder, which is designed according to the invention as a lattice triangle, is achieved solely by the dead weight, whereby the dead weight can be increased by providing consoles for the octagonal or round-shaped base plates on the side of the support cylinder, the base plates being above Have quick-release fasteners that correspond to the ball joint receptacles assigned to the support cylinder. This also gives you the option of detaching the base plates from the brackets after unfolding the lattice triangle and then quickly connecting them to the support cylinder using the quick-release fasteners, in order to ensure even support even on uneven floors. It is advantageous, however, that due to the weight of the brackets and the base plates, the corresponding section of the boom can be quickly lowered or folded out.

In order to be able to store the superfluous tensioning cable cheaply and gently when the support mast is retracted, it is provided that the friction winches are assigned to the end of the tensioning rope without load-storing magazine drums. So that the end of the tensioning rope is always safely housed, does not represent a hindrance for the workers, nor is there a risk that it will be caused by environmental influences or the like. is damaged.

According to the invention, reliable guidance of the tensioning rope in the area of the outrigger arms is ensured in that the rope pulley is mounted on the section in an oscillating manner. At the same time, this also ensures that, regardless of the pivoting-in process of the assigned boom, the necessary force can be applied to ensure the folding or swiveling of the corresponding section with the support cylinder. In this way, large rope lengths can be optimally guided over the rope pulley without fear that the tension rope will become tangled or slip.

The invention is characterized in particular by the fact that an antenna system with a supporting mast and base frame that is advantageously transportable is created, which can be applied to the chassis or the loading area of the carrier vehicle without difficulty, because the outriggers assigned to the base frame can be folded to container dimensions. The booms that are important for supporting the mast are folded in so that they do not represent any hindrance during transport. When they are folded in, they are actuated by the guy rope and brought into the transport position without the need for additional intervention by the operating teams. At the same time, the operating bars are also folded in, which can then also be optimally used to secure the machine parts behind them. Conversely, the booms are swung out via the hydraulic cylinders assigned to the articulated struts. By correspondingly giving in and guiding the tensioning rope, the swung-in section of the jib also swings out at the same time, so that it can then be locked in the swung-out position via the beam. To compensate for the height, the support cylinder assigned to each is extended to secure the entire system. When the boom is swung out, the associated operating dock is then also swung out at the same time, which is then available at an early stage for inspecting the system and thus for carrying out assembly work.

• Fig. 1 eine mobile Antennenanlage in Arbeits­stellung in Seitenansicht,
• Fig. 2 die mobile Antennenanlage in Draufsicht mit ausgefahrenen Auslegern,
• Fig. 3 einen eingeklappten Ausleger,
• Fig. 4 einen ausgeklappten Ausleger,
• Fig. 5 die Sicherung der aus Fig. 4 zu ersehenden Arbeitsposition,
• Fig. 6 eine Draufsicht auf einen ausgeschwenkten Ausleger im vorderen Bereich,
• Fig. 7 einen ausgefahrenen Ausleger im hinteren Bereich und
• Fig. 8 eine mobile Antennenanlage in Transport­stellung.

Further details and advantages of the subject matter of the invention result from the following description of the the associated drawing, in which a preferred embodiment is shown with the necessary details and individual parts. Show it:

• 1 is a mobile antenna system in working position in side view,
• 2 shows the mobile antenna system in a top view with the arms extended,
• 3 shows a folded boom,
• 4 shows an extended boom,
• 5 shows the securing of the working position shown in FIG. 4,
• 6 is a plan view of a pivoted boom in the front area,
• Fig. 7 is an extended boom in the rear area and
• Fig. 8 is a mobile antenna system in the transport position.

Fig. 1 shows a mobile antenna system with extended mast (1), antennas (2) are attached to the top. The support mast (1) is located on a carrier vehicle (3), on the chassis (4) or loading area (5) of which the entire support mast (1) can be stored with the appropriate guying during transport. The carrier vehicle (3) usually remains with the antenna system. Since the container dimensions are large, it can be transported on the railroad or on ships without any problems and then without a carrier vehicle (3).

To tension and secure the mast (1) when extended, the tensioning cables (9) arranged and tensioned between the mast head (6) and the front brackets (7) and the rear brackets (8) and the correspondingly swung out front and rear brackets are used (7, 8) itself. The tension cables (9) are over Rope pulleys (10), which are assigned to the arms (7, 8), as will be explained further below.

The arms (7, 8) are pivotally mounted on the base frame (11) and consist of two sections (12, 13). The inner section (12) seen from the base frame (11) is pivotably mounted on the base frame (11), while the outer section (13) carries the support cylinder (14) with the base plate (15) and is pivotable with the section (12). connected is. The support cylinder (14) and base plate (15) have corresponding connecting means so that both parts for supporting the mobile antenna system can be quickly connected to one another.

Fig. 2 shows a plan view of the base frame (11), on which the pivotably arranged or executed arms (7, 8) are arranged. The support mast (1) is shown in the extended position. The tensioning ropes (9) are brought together from brackets (7, 8) on the mast (1) and more precisely on the mast head (6).

2 with the hydraulic cylinders (20) actuating them serve at the same time for supporting and locking the booms (7, 8). The booms are therefore safely braced and can fully fulfill the tasks intended for them. the rear buckling struts (24) are extended via the hydraulic cylinders (25) and locked accordingly. With the base plates (15) attached to the support cylinders (14), the support cylinders can be extended even on extremely uneven terrain so that the antenna system can be operated in the optimal and safe position. The necessary height compensation and thus the exactly horizontal position of the base frame (11) is carried out via the support cylinders (14).

Fig. 3 shows the two sections (12, 13) in the swung-in and Fig. 4 in the swung-out state. Clear is that the section (13) of a base strut and support strut having grid triangle (30) is formed, on the base strut (31) of the support cylinder (14) is arranged. The node (32) of the lattice triangle (30) formed by the support struts carries the horizontal joint (33) to pivot around the lattice triangle (30) and thus the section (13) from the transport position according to FIG. 3 into the working position according to FIG. 4 to be able to, this is due to the weight of the section (13).

At a node (34) of the lattice triangle (30) formed by the base strut and the support strut, namely opposite the jib foot (17), the cable pulley (10) is arranged, which when actuated via the cable winch for the pivoting back of the lattice triangle (30) and thus the Section (13) in the transport position shown in Fig. 3 takes care. On the outside of the support cylinder (14), brackets (16) are attached, on which the base plate (15), as shown in FIG. 3, can be clamped in order to then use the corresponding quick-release fasteners when the section (13) in accordance with FIG. 4 is extended to be connected to the boom foot (17).

In Fig. 4 the boom is shown with the section (13) swung out. This pivoted-out position is ensured in that a bar (35) is pivotally arranged on the short strut of the lattice triangle (30) and is simultaneously guided in the section (12). As a result, it slips from the position shown in FIG. 3 into the position shown in FIG. 4, in which a segment lock (37) is pushed in front of the bar (35) via a spindle (36), so that, as shown in FIG. 5 can be seen, is optimally secured. Beams (35) and section (12) have a bolt (38) or a hook (39) to enable the connection secured by the segment lock (37). At the same time, a fuse can be secured via the bolt (38) and a corresponding pawl on the section (12) pivoted-in state can be achieved. The bar (35), which is pivotably connected to the grid triangle, is then advantageously secured in the transport position even if the tensioning cable fails.

3 and 4, the cable winch is designed as a friction winch (41), with the return cable (42) and the tensioning cable (9) ensuring that when the tensioning cable (9) is retracted, a swiveling back of the cable is carried out at the same time Part (13) takes place if the segment lock (37) has previously been pivoted or turned away via the spindle (36).

6 and 7 show the bracing and securing of the brackets (7, 8) already apparent from FIG. 2 by means of the buckling struts (19, 24). In addition, it is made clear that the buckling strut (19) is connected to the operating web (21) via the coupling rod (22), so as to achieve the pivoting of the operating web (21), which itself is guided via the handlebar (23). The operating web (29) is in turn connected to the base frame (11) via the handlebars (27), whereby a uniform pivoting of the operating web (29), which is covered with a safety light curtain (28), is achieved, with a simultaneous connection of the operating web (29) via a coupling rod (26) with the section (12). The articulated struts (19, 24) have a connection to the respective hydraulic cylinder (20, 25) in the articulated joints (43, 44).

When the booms (7, 8) are pivoted out, the individual operating webs (21, 29) are simultaneously pivoted out via the buckling struts (19, 24) so that they can be walked on. Conversely, as when swinging the boom (7, 8), the individual operating webs (21, 29) are also lifted and swung back at the same time via the articulated struts (19, 24) or the handlebars (22, 26) when the boom is swung in. The optimal container width can be maintained because the folded arms (7, 8) are pivoted in front of the service bars (21, 29).

Fig. 8 shows again the transport vehicle (3) in side view, but here the entire mast (1) and the antennas (2) have been moved into the transport position. It is clear here that the individual booms (7, 8) with their two sections (12, 13) are each raised or retracted so that they ensure the container dimensions. The base plates (15) are clamped and supported on the support cylinders (14) via the brackets (16) so cheaply that they fit into the entire container size. This results in an overall very compact design of such a mobile antenna system with a loaded mast (1).

Claims (11)

1. Mobile antenna system with a telescopic mast, which is arranged on a base frame with a base area corresponding to that of a container, the base frame having laterally fold-out cantilevers which are provided at their outer ends with support cylinders and base plates which are supported on the base,
characterized,
that the front and rear booms (7, 8) are designed as a two-part structure, the outer section (13), which supports the support cylinder (14), via a horizontally arranged joint (33) opposite the inner one connected to the base frame (11) Section (12) is pivotable and has a rope pulley (10), via which a tensioning rope (9) which can be actuated by a cable winch (41) assigned to the supporting structure is guided to the mast head (6), and that both sections (12, 13) of the front and the rear boom (7, 8) are each connected as a whole to the base frame (11) via an articulated strut (19 or 24), each of the articulated struts (19, 24) being connected by an associated hydraulic cylinder (20; 25). and can be folded out again. 2. Antenna system according to claim 1,
characterized,
that the front and rear arms (7, 8) with the base frame (11) are connected to control bars (21, 29) which have links (23, 27) with which the control bars can be pivoted relative to the base frame. 3. Antenna system according to claim 2,
characterized,
that the articulated struts (19, 24) and / or each section (12) of the boom (7, 8) with the pivotable operating webs (21, 29) or the guide arms (23, 27) guiding them via coupling rods (22, 26 ) are connected. 4. Antenna system according to claim 1,
characterized,
that the section (13) of the front and rear arms (7, 8) carrying the support cylinder (14) is formed to form a grid triangle (30) consisting of the base strut (31) and support struts, on the base strut (31) of which the support cylinder (14) is attached and in the node (32) of the horizontally arranged joint (33) and at the node (34) opposite the jib (34) the pulley (10) is arranged. 5. Antenna system according to claim 4,
characterized,
that at the node (34) carrying the rope pulley (34) of the lattice triangle (30) is guided in the section (12) connected to the base frame (11) guided, in the extended position lockable bar (35) is pivotally mounted. 6. Antenna system according to claim 5,
characterized,
that the segment (12) connected to the base frame (11) is assigned a segment lock (37) which can be pivoted via a spindle (36) in front of the beam (35), the beam at the free end and the segment in the locked state interlocking bolts (38) and have hooks (39). 7. Antenna system according to claim 1,
characterized,
that the cable winches assigned to the sections (12) are designed as hydraulically driven friction winches (41). 8. Antenna system according to claim 7,
characterized,
that the guy rope pre-tensioning force of all friction winch (41) is monitored together and hydraulically controlled. 9. Antenna system according to claim 1 and claim 4,
characterized,
that consoles (16) are provided on the side of the support cylinder (14) for the octagonal or round base plates (15), the base plates having quick-release fasteners which correspond to those of the ball joint receptacles assigned to the support cylinder. 1o. Antenna system according to claim 1 and claim 7,
characterized,
that the friction winches (41) have the end of the tensioning cable (9) associated with storage-free magazine drums. 11. Antenna system according to claim 1 and claim 4,
characterized,
that the rope pulley (1o) is swinging on the section (13).

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