EP1935833A1 - Framework unit for a large mobile crane and method for its erection - Google Patents

Abstract

A lattice piece comprises four corner shafts with adjoining mid-point bars and diagonal bars. The lattice pieces are each divided into two such that at two inter-joined corner shafts, in each case, one part of the mid-point- and diagonal-bars are hinged connected. An independent claim is given for a method for putting up a lattice piece.

Description

The invention relates to a lattice piece for a mobile large crane and a method for erecting such a lattice piece.

Mobile large cranes are transported on public roads to the respective locations. Here the rules of the public road traffic apply, for example in Germany rules of the StVZO. So the maximum permissible weights and dimensions are fixed. Other countries have similar rules.

These regulations mean that the dimensions of the parts to be transported are limited. Thus, the total size of the mobile crane and thereby the maximum achievable load and its projection (load torque) is limited.

There have already been formulated different approaches to increasing the load. So has already been in the DE 20 2005 017 362 U1 proposed to couple two cranes. From the WO 2005/030632 A1 It is known to use two outriggers parallel to a crane. In these two proposals, the two outriggers provided here are interconnected.

According to another proposal, lateral stiffeners were attached to both arms on both sides and adjusted with a double derrick (as proposed in the DE 100 02 917 A1 ).

In the EP 1 015 374 B1 It is already described to create lattice pieces which are dimensioned slightly smaller than the dimensions of a container in order to facilitate the transport of the lattice pieces. Here different profiled corner handles were used. The transport of the lattice pieces was carried out here analogous to the transport of a container with corresponding connections, as they are known in containers.

Since the cantilevered outriggers are to be pivotable on a common axis, all solutions have in common that the width of the assembled cantilever was always greater than the height. Thus, the known boom in the rocker plane less resilient than perpendicular to the rocker plane. For long and heavy head jibs, the maximum length to be erected is also limited by the cross-sectional values of the jib in the teetering plane.

Even with large radii of the "buckling bar boom" is highly loaded by the weight in the direction of the rocker plane, i. high cross-sectional values of the boom allow high payloads.

Object of the present invention is to provide lattice pieces that can be used in a mobile crane, with extremely high loads can be lifted to great heights, the individual lattice pieces still remain road transportable.

According to the invention this object is achieved by a lattice piece with the features of claim 1.

Accordingly, a lattice piece for a mobile large crane, which consists of four corner posts and diagonal bars connecting them, so divided into two parts that two interconnected corner stems each part of the diagonal bars is articulated hinged. The lattice pieces according to the invention can be transported in this disassembled form. As a result, large lattice pieces can be created with a profile which has a cross section of, for example, 8 x 6 m and a length of 11 m. The mesh pieces of the present invention can be assembled into a correspondingly powerful boom. The lattice pieces according to the invention can be transported with so-called flat containers. These have dimensions that are uniform worldwide.

While the length of the lattice pieces can be chosen so that the length can be maintained during transport, the disassembly of the lattice pieces into two parts is preferably chosen such that a separation takes place in the width as well as in the height of the lattice pieces. The lattice pieces are to be designed so that the assembly and disassembly of the respective lattice piece can be carried out economically. This means that the construction and dismantling of the lattice piece must be done in a reasonable amount of time, with the least possible aids and taking into account the safety during assembly and disassembly.

Advantageous embodiments of the invention will become apparent from the subsequent claims to the main claim.

Accordingly, additional zero rods can be hinged hinged to two interconnected corner stems. These zero bars serve to increase the stability. But they are not fundamentally necessary. In their place, according to another preferred embodiment of the invention, a rigid connection between the individual lattice pieces occur.

Furthermore, the lattice pieces can advantageously have corner stems, which consist of profiles which have fork-finger connections at their ends. At each corner post four zero bars and four diagonal bars can be articulated.

At least a portion of the zero bars and / or the diagonal bars may be telescopic.

Both the zero bars and the diagonal bars can be fixed in the construction in each case by means of bolted connections to the corner posts or with one another.

Advantageously, the profile of the corner handles made of two angled box-shaped miteinender welded sheets, to which each of the fork-finger connections are welded. Advantageously, the connection between the corner stems and the diagonal and zero bars is rigid.

Advantageously, positioning devices can be provided for positioning the diagonal bars and / or zero bars in the disassembled state. So the transport units are securely kept in touch. The positioning devices can also remain in the constructed lattice piece and in the crane use on or in the lattice piece.

A further advantageous embodiment of the invention is that an additional spatial diagonal is provided in each grid element.

• Nebeneinanderlegen der beiden Gitterstückteile;
• Ausschwenken entsprechender Diagonalstäbe und Verbolzen mit den Eckstielen der gegenüberliegenden Gitterstückteile,
• Anheben der durch das Verbinden der Gitterstückteile entstandenen oberen Scheibe und dadurch Ausziehen von vier teleskopierbaren Diagonalstäben, sowie Verbolzen der Diagonalstäbe in ihrer ausgezogenen Stellung;
• Verbolzen, der während des Anhebens in die Endstellung geschwenkten Nullstäbe.

A preferred method for erecting a lattice piece according to the invention consists of the following steps:

• Juxtaposing the two lattice piece parts;
• Pivoting corresponding diagonal bars and bolts with the corner stems of the opposite lattice piece parts,
• Lifting the resulting by connecting the lattice pieces upper disc and thereby extracting four telescoping diagonal bars, as well as bolting the diagonal bars in their extended position;
• Bolted, the zero rods pivoted during lifting to the end position.

Particularly advantageously, the zero rods can roll during erection over arranged at their free ends rollers along the corner stems.

Figur 1:

eine perspektivische Darstellung eines erfindungsgemäßen Gitterstücks in aufgebauter Form,

Figur 2:

eine seitliche Darstellung eines Gitterstücks gemäß Figur 1 in zusammengelegter Form,

Figur 3:

eine seitliche Darstellung eines Gitterstücks gemäß Figur 1,

Figur 4:

eine Draufsicht auf ein Gitterstück gemäß Figur 1,

Figur 5:

eine Vorderansicht eines Gitterstücks gemäß Figur 1,

Figur 6:

einen teilweisen Schnitt durch einen Teil eines Gitterstücks und

Figur 7a)-c):

eine schematische Darstellung des Aufrichtvorgangs eines erfindungsgemäßen Gitterstücks in verschiedenen Zwischenstadien.

Further features, details and advantages of the invention will become apparent from the embodiments illustrated in the drawings. Show it:

FIG. 1:

a perspective view of a lattice piece according to the invention in a built-up form,

FIG. 2:

a side view of a lattice piece according to FIG. 1 in a collapsed form,

FIG. 3:

a side view of a lattice piece according to FIG. 1 .

FIG. 4:

a plan view of a lattice piece according to FIG. 1 .

FIG. 5:

a front view of a lattice piece according to FIG. 1 .

FIG. 6:

a partial section through a part of a lattice piece and

Figure 7a) -c):

a schematic representation of the Aufrichtvorgangs a lattice piece according to the invention in various intermediate stages.

In FIG. 1 an inventive lattice piece 10 is shown in perspective. This lattice piece consists of four corner stems 12, which are connected to each other via diagonal bars 14 and 16 and zero bars 18 and 20, respectively. A lattice piece 10, as in the FIGS. 1 to 5 is shown, for example, has a length L of 11 m, a width B of 8 m and a height H of 6 m.

In order to transport this lattice piece on the street, it is divided into two parts. In this case, two lattice piece halves, each comprising two corner handles 12, formed. These lattice piece parts are starting from the constructed lattice piece according to FIG. 1 formed by that corresponding bolt connections to the diagonal bars 16 and the zero bars 18 are solved at least on one side. The respective divided lattice pieces 10 are then in a folded position, as in FIG. 2 is shown transferred. For this purpose, the zero rods 20 are folded and the diagonal bars 14, which are telescopic, ateleskopiert. The corresponding folded or extended state is in FIG. 3 represented by the distinction of solid to dash-dotted lines. As in FIG. 3 shown, the diagonal bars 14 are each struck at pivot points 22 and 24 of the corner stems 12. In extended position, as in solid line in FIG. 3 is shown, the diagonal bars 14 are bolted via bolts 26 in its extended position. The zero bars 20 are struck in each case via pivot points 28 on a corner post 12. The opposite free end can be bolted to the opposite corner post 12.

In FIG. 4 is a view from above shown. Here, the corner handles 12 are connected to each other via the diagonal bars 16 and the zero bars 18. The diagonal bars 16 are pivotable about pivot points 28, while the zero bars 18 are pivotable about pivot points 30 and 32, respectively. The pivoted position is in the FIG. 4 represented by dash-dotted lines. In the extended position shown here, the respective free ends of the diagonal bars 16 and the zero bars 18 are bolted to the opposite Anbolzpunkten the corner post 12. As in FIG. 5 is shown, there are no spatial diagonal bars. There are only the adjacent corner stems 12 connected to each other. This is made possible by the fact that rigid connections between the corner stems 12 and the diagonal 16 or 14 and the zero bars 18 and 20 are created.

Between the lattice pieces very high forces are to be transmitted. Thus, the provided on the corner pieces 12 fork-finger connections 34 are very heavily loaded. To facilitate the handling of the bolts can be multi-section fork-finger connections 34, such as those in the FIG. 4 or the FIG. 1 are shown used. Here comparatively smaller bolts can be used.

The corner handles 12 may be made of any profile. Advantageously, the profile according to the embodiments according to FIG. 6 made of two angled and welded sheets 36, 38. The cross-sectionally square profile has a side length of about 800 x 800 mm. At the corner piece guide plates 40 may be welded to corresponding stiffeners 42 for receiving the zero bars or diagonal bars. With 44 bolt connections are indicated here.

The profiles of the diagonal bars 14, 16 and zero bars 18, 20 is arbitrary. They consist for example of a welded pipe construction or a welded construction of straight or bent sheets. In any case, the profiles are formed but kink-proof.

Based on FIG. 7 is purely schematic and exemplified the process sequence for the construction of the lattice piece according to the invention.

In Figure 7a is shown as a first transport unit 46 is removed by means of an auxiliary crane not shown here from a flat container, also not shown, on which the first transport unit has been transported and is stored at a distance B from a second transport unit 48. This second transport unit 48 was previously also taken up by a flat container with the auxiliary crane and to the in Figure 7a shown position.

According to the FIG. 7b First, the lower diagonal bars 16 are swung out and bolted, resulting in the distance B of 8 m. To the corresponding Unfold the diagonal bars 16 and the zero bars 18 are attached to an auxiliary crane. After the lower diagonal 16 and the lower zero bars 18 were swung out and bolted, the upper diagonal 16 and the upper zero bars 18, that is, the diagonal 16 and the zero bars 18 of the upper disc, swung out and bolted by means of bolts 50 with the corner stems 12 ,

According to FIG. 7c Then the upper disc is lifted with an auxiliary crane, not shown here in the direction of arrow a upwards. As a result, the four telescoping diagonal bars 14, which in the FIG. 7c not drawn from the side, but from the front, pulled out, so that the height of 6 m results. In the corresponding end position, the diagonal bars are bolted together via bolts 26. During erection of the lattice piece 10 by means of the auxiliary crane simultaneously run the zero rods 20, which for reasons of simplicity in the FIG. 7c are not shown, via rollers 52 (see. FIG. 3 ) along the corner posts 12 in their mounting position. As in the slightly modified embodiment according to FIG. 3 shown, the zero rods 20 can embrace the corner stems 12 fork-shaped. In this position, the zero rods 20 can be bolted to the corner stems 12. According to the embodiment in the Fig. 1 and Fig. 5 the zero rods 20 are bolted to corresponding tabs welded to the corner posts. Not shown here are roles similar to those in the FIG. 3 act described manner.

To now the boom 10 of its erected position, as for example with reference to the FIG. 3 is shown to merge again, the zero rods 20 are slightly pushed inward after unbolting until a lever arm results on the roller 52, so that the dead weight when lowering the upper disc of the zero rod 20 continues to run along the corner post 12. Of course, when removing the bolts 26 are pulled so that the telescoping diagonal bars 24 can be pushed together.

In a similar manner as the lattice pieces 10 shown here, the pivot piece or the head piece (not shown here) can be made collapsible.

Claims (14)

Lattice piece (10) for a mobile large crane consisting of four corner stems (12) and these connecting diagonal bars (14, 16),
characterized,
that the lattice pieces (10) are so divided in two, respectively, that at two corner posts connected with each other (12) in each case a part of the diagonal bars (14,16) is foldably hinged. A lattice piece according to claim 1, characterized in that at two interconnected corner stems (12) additional zero rods (18, 20) are articulated hinged. A lattice piece according to claim 1, characterized in that rigid connections are provided between adjacent lattice pieces. A lattice piece according to any one of claims 1 to 3, characterized in that the corner posts (12) consist of profiles which have fork-finger connections (34) at their ends. A lattice piece according to claim 1, 2 or 4, characterized in that at each corner post (12) four zero rods (18,20) and four diagonal bars ((14,16) are articulated. A lattice piece according to one of claims 1 to 5, characterized in that the diagonal bars (14, 16) and / or the zero bars (18, 20) are at least partially telescopic Lattice piece according to one of claims 1 to 6, characterized in that the zero rods (18, 20) and / or diagonal bars (14, 16) in each case via bolt connections to the corner posts (12) or with each other via bolt connections can be fixed. Lattice piece according to one of claims 1 to 7, characterized in that the profile of the corner posts (12) consists of two angled box-shaped miteinender welded sheets. A lattice piece according to any one of claims 1 to 8, characterized in that it is divisible and collapsible such that it is transportable in a container. Grid piece according to one of claims 1 to 9, characterized in that the connections between the corner posts (12) and the diagonal (14, 16) and zero bars (18, 20) are at least partially rigid. Grid piece according to one of claims 1 to 10, characterized in that in addition a spatial diagonal bar is provided. Lattice piece according to one of claims 1 to 10, characterized in that positioning devices are provided for the positioning of the diagonal bars (14, 16) and / or zero bars (18, 20) in the disassembled state. A method of erecting a lattice piece (10) according to any one of claims 1 to 12, comprising the following steps: - juxtaposition of the two lattice piece parts; Pivoting out corresponding diagonal bars (14, 16) and zero bars (18, 20) and bolting to the corner posts (20) of the opposite grid piece parts, - Lifting of the resulting by connecting the lattice pieces upper disc and thereby extracting telescopic diagonal bars, (18,20) and bolting the diagonal bars (18,20) in its extended position; - Bolted, the zero rods pivoted during lifting in the end position (14, 16). A method according to claim 13, characterized in that the zero rods (14, 16) roll during erection over arranged at their free ends rollers (52) along the corner stems.

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