EP1084981A1 - Articulated trussed beam with triangular section - Google Patents

Abstract

The crane has a tiltable cantilever member (13) that is connected a further support member (33). A rear cable (9) is connected to position (8) on the support (3) to a position in the region of the top of the tower (11). A short cantilever member (52) is located between the cantilever member and further support member. The short cantilever member is connected to the main cantilever member via an upper belt and to the further support member via a lower belt.

Description

The invention relates to articulated, triangular in cross section Lattice girders, which are an articulated connection of those running in the profile tips Fold top straps and stretch them into their stretched or nearly stretched Swivel position and in its folded position in a side let adjacent layer spend, preferably boom of one self-assembling tower crane, which resembles an accordion in its transport position can fold on this.

From EP 0 132 572 B1, for example, a self-assembling tower crane is included telescopic tower known, at the outer end of a boom link is articulated, with which, if necessary, an outer boom part via a boom center piece is articulated. A guy rope runs from a fixed point on the Tower-bearing revolving stage via two supports articulated in the area of the top of the tower to a fixed point on the boom-side support, at which two additional guy ropes are attached, one of which to a fixed point on the boom link and the other via at least one further support to a fixed point is guided on the outer boom part, such that the crane through Telescoping the tower in its erected operating position.

The outer boom part or the boom center piece, which is described in EP 0 132 572 B1 is not shown, but can be provided, are so articulated with the boom articulation piece connected that this is in the folded transport position can be placed on the side of the boom link to increase the transport height to decrease if the tower crane is one, for example Mobile crane deals, the tower of which is pivotally mounted on the superstructure.

With cranes of this type, the problem arises that is associated with the jib link, which is folded onto the horizontally lying tower in the transport position Boom part, which is a boom center piece or an outer boom part can act in a simple manner to the boom articulation part fold that on the one hand the height of the transport unit in the desired Way reduced and on the other hand easy assembly when erecting of the tower and unfolding of the boom is guaranteed.

The object of the invention is therefore, articulated, in cross section to create triangular lattice girders of the type specified at the outset swivel in a simple and easy-to-use manner about two axes let them fold up once and stretched into each other Swivel position and on the other hand from its folded Have the position in a side-by-side position to the transport height to decrease in the desired manner.

According to the invention, this object is achieved in that the articulated connection a joint which can be pivoted about intersecting axes, e.g. universal joint is, and that with a lattice girder in the region of the joint, a support structure is connected to the one pivotally connected to the other lattice girder Rod is articulated in such a way that at a distance from the first joint a second articulated connection is made, the one with the first articulation Forms pivot axis, which is approximately at right angles to the longitudinal beams of the triangular Profiles runs.

Around the second joint, the lattice girders can be folded between them and pivot their extended position to each other. In the stretched Position are the lattice girders through the joint connecting the top chords and the butt-end faces of the two lower chords with each other connected. In the folded position, the second articulated Loosen the connection so that the brackets fold laterally around the first joint to let.

The pivotable rod is expediently supported by stiffening rods and foldable about an axis of rotation in such a way that the support structure in the transport position, the installation space is not increased upwards.

The first joint allows after loosening the second articulated connection a side folding of the lattice girders, although the first joint alone does not create a stable connection. In a further embodiment of the invention therefore provided that a detachable articulated at a distance from the first joint Connection between the top chords is provided around which the lattice girder After loosening the second articulated connection, let it fold sideways.

With a self-assembling tower crane, the tower is moved into its vertical Position swiveled with the boom parts folded. Only from this vertical Then position out, for example by telescoping an inner Tower shot, the folded boom parts unfolded and in their each other stretched position spent. Are the folded boom parts still in its folded vertical position to the tower, that can be Boom center piece or, if this is not available, the outer boom part around the first joint and the further articulated connection between the upper chords pivot to the boom linkage in a position in which the Upper chords are parallel to each other and the heights of the profiles of the triangular lattice girders are aligned. In this position, the second articulated can then Establish connection and the further articulated connection between the Loosen the top chords so that the lattice girders increase as the crane is erected can be pivoted into their extended position.

Fig. 1

eine Seitenansicht eines unten drehenden selbstmontierenden Turmdrehkrans im aufgerichteten Zustand in schematischer Darstellung,

Fig. 2

eine Seitenansicht des Turmdrehkrans nach Fig. 1 in seinem auf einem Kranfahrzeug zusammengefalteten Transportzustand,

Fig. 3

eine Vorderansicht des zusammengefalteten mobilen Turmdrehkrans nach Fig. 2,

Fig. 4 bis Fig. 7

den Turmdrehkran nach den Fig. 1 bis 3 in unterschiedlichen Zuständen während seines Aufrichtens,

Fig. 9

eine schematische Darstellung des an den Turm angeklappten Auslegeranlenkstücks mit auf diesen zurückgefalteten und seitlich angeklappten Auslegermittelstück, an den wiederum das äußere Auslegerteil angeklappt ist,

Fig. 10

eine der Fig. 9 entsprechende Darstellung, in der das an das Auslegeranlenkstück angeklappte Auslegermittelstück in eine Stellung zurückgeschwenkt ist, in der die Höhen der Profile in einer Ebene liegen und eine gelenkige Hilfsverbindung zwischen den beiden Auslegerteilen hergestellt ist,

Fig. 11

eine perspektivische, der Fig. 10 entsprechende Darstellung und

Fig. 12

eine der Fig. 10 entsprechende perspektivische Darstellung einer alternativen Konstruktion.

An embodiment of the invention is explained below with reference to the drawing. In this shows

Fig. 1

2 shows a side view of a self-assembling tower crane rotating below in the erected state in a schematic illustration,

Fig. 2

1 in its transport state folded on a crane vehicle,

Fig. 3

3 shows a front view of the folded-up mobile tower crane according to FIG. 2,

4 to 7

the tower crane according to FIGS. 1 to 3 in different states during its erection,

Fig. 9

1 shows a schematic illustration of the boom link piece folded onto the tower with the boom center piece folded back onto it and laterally folded, to which the outer boom part is in turn folded,

Fig. 10

9 shows a representation corresponding to FIG. 9, in which the boom center piece folded onto the boom link piece is pivoted back into a position in which the heights of the profiles lie in one plane and an articulated auxiliary connection is established between the two boom parts,

Fig. 11

a perspective view corresponding to FIG. 10 and

Fig. 12

a perspective view of an alternative construction corresponding to FIG. 10.

The rotating tower crane shown schematically in Fig. 1 consists of a pedestal 1 supported on the floor, which also, as from FIGS. 2 and 3 can be replaced by the undercarriage of a mobile crane, which in its operating position is supported by extendable supports, and from one on the pedestal or undercarriage 1 via a slewing ring 2 superstructure 3 or revolving stage. A lower tower part 4 is articulated with the rotating platform 3 connected, from which an upper tower part 5 by drive means, for example one Pulley system that can be extended and retracted. The tower 4, 5 can be between its transport position lying on the rotating platform 3 and its one shown in FIG. 1 pivot upright position, this pivoting usually done by an assembly block and tackle. In the upright position the tower 4, 5 is locked to the revolving stage 3, for example by the upper one and lower support struts 6, 7 and a foot-side connection. With a benchmark 8 on the revolving stage 3, a tension element 9 is connected to a fixed point 10 of a rear support 11 which runs in the area of the tower top Joint 12 is connected to the boom articulation part 13. There is another one in joint 12 Support 14 hinged, from the outer fixed point 15, a tension element to the Fixed point 10 of the back support 11, which for example consists of two through the Hinge 16 connected guy rods 17, 18 may exist. From the benchmark 15 runs a tension element 20, which consists of a rope or a telescopic Rod can exist, to the fixed point 21 in the end region of the boom link piece 13. From the fixed point 15 a guying continues to the fixed point 23 on the outer boom part 24, the guying being foldable from each other connected rods 25, 26 or ropes 27, 28 may exist.

The rear guy 9 can also be made of a rope or articulated and / or telescopically interconnected rods 30, 31, 32.

As can be seen from FIG. 1, this can be connected to the boom center piece 33 Jib piece 24 also rock over the assembly winch 34, the rope 35 in the manner shown via rollers to the fixed point 36 on the boom center 33 runs.

The tower crane shown in FIG. 1 can be erected by erecting the tower 4, 5 and then telescoping the outer tower part 5 into its operating position spend.

From Fig. 2 the tower crane shown schematically in Fig. 1 is a mobile crane in shown its transport position. The undercarriage 1 of the mobile crane consists of the chassis, which is provided with extendable supports 40. In the from the Fig. 2 and 3 visible transport position is the boom link 35 on the telescoped Tower 4, 5 folded. That folded back onto the boom link 35 The boom center piece 33 is folded sideways onto the boom articulation piece 35, thereby increasing the transport height of the mobile crane in the transport position reduce. On the boom center piece 33 is located in the area of the base straps Cross joint the outer boom part 24 folded.

4 to 7, the tower crane is in various states during of his raising up.

Fig. 4 shows the pivoted by an angle of about 60 degrees to the rotating platform Tower to which the zig-zag-like boom parts are attached the tower is folded. The boom center piece is still on the side of the boom linkage 13 created to reduce the transport height. The rear guy 9 is still without tension, some of which is still the guy forming rods are angled on top of each other.

In the position shown in Fig. 5, the tower is fully erected and with the revolving stage locked. The rear guy 9 is in the stretched Condition so that by further telescoping the inner tower section 5 out the outer tower section 4 via the guy 9 unfolding the boom Tension is exerted. 5 is the boom center piece 33 relative to the boom link 13 by one to the two boom parts parallel axis has been rotated to a position in which the heights of the Align profiles or the center planes of the boom parts. After loosening the upper joint between the boom link 13 and the boom center 33, the rotation of the two boom parts by a parallel to these Axis allowed, the boom center piece is shown in Fig. 6 33 lowered relative to the boom link 13. This lowering happens in a known manner via the mounting part 35 using the mounting screw 34.

Fig. 7 shows the increasing unfolding of the guy lines with further telescoping the inner tower section 5.

Fig. 8 shows the state after further telescoping the inner tower section.

9 to 11, the articulated connection between the boom articulation part and the boom center section explained in more detail.

In the state shown in FIG. 10, which is the mounting state according to FIG. 5 corresponds to the boom articulation part 13 and the boom center part 33 by two Joints connected to each other, namely once by a pivotable about two axes Hinge, one hinge axis 50 parallel to the top chords 51, 52 of the lattice girder forming the boom link 13 and the boom center 33 runs, and on the other hand through an articulated connection, the Pivot axis indicated by the dash-dotted line 53 and the second hinge axis of the joint 67. The articulated connection with the pivot axis 53 consists once of the joint 54, which is formed by a bearing fork 55, the is held by the linkages 56, 57, 58, and from the pivotable with the base spar 60 in the hinge 61 about a parallel to this axis pivotally mounted Rod 62, which carries an articulated eye at its end, which is in the storage fork 55 is boltable. On the other hand, this is only shown by the tabs 63, 64 Articulated as a universal joint 67, so that this both a pivot around the axis 53 and around the axis 50, which are perpendicular to each other run.

In the position shown in Fig. 10 is a pivot about the pivot axis 50 of the universal joint 67 blocked by the joint 54, so that only one Swiveling around the axis 53 is possible.

The rod 62 is through an inclined rod 65, which is additionally through the Rod 66 is connected to the rod 62 to form an A-frame, stiffened. The legs of the bars 62, 65 projecting beyond the transverse bar 66 are articulated with connected to the base spar 60 so that the rod 62 extends around the base spar 60 parallel axis 61 is pivotable.

The rod 56 carrying the bearing fork 55 is in the manner shown in FIG. 11 stiffened by the rods 57, 58 welded to it.

As can be seen from FIG. 11, the distance from the universal joint 67 is between the upper chords 51, 52 are provided with a second articulated connection 68 which is detachable is to pivot the two boom parts only around the through the joints 54, 67 to allow defined pivot axis 53.

In the transport position shown in FIGS. 2 and 3 and in the position shown in FIG. 4 Mounting position is the boom center part 33 on the boom articulation part 13 folded back and folded to the side.

After the tower is erected in the vertical position shown in FIG. 5 has been, the boom pieces 13, 33 in the apparent from FIGS. 5 and 10 Aligned so that the heights or median planes of the boom pieces forming lattice girders lie in a common plane in which the rod 62nd locked with its eye in the fork 55 of the joint 54 by a hinge pin can be. In this position, the joint 68 is then released so that the boom center piece in the manner shown in FIGS. 7 and 8 relative to the boom link 13 can be pivoted about the axis 53.

FIG. 12 shows a variant of the articulated connection shown in FIG. 11 of the boom center part 33 with the boom articulation part 13 can be seen. In deviation of the embodiment shown in FIG. 11, the rods 56, 58 are by a Rod 70 stiffened, which is connected to the upper flange 51 of the boom articulation part is.

The triangular composite consisting of the webs 62, 75, 76 is shown in FIG Mounted in the joints 71 and 72 in the area of the lower flange 60 and the upper belt support 52 of the middle part of the boom are formed and an oblique Define running joint axis 73. The hinge 72 is slightly above the upper one Belt carrier arranged to improve the foldability.

The outer ends of the rods 56 and 62, which are hinged together, are inclined outwards to move the swivel axis further outwards can.

Claims (3)

Articulated, cross-sectionally triangular lattice girders (13, 33), which fold together about an articulated connection of the upper chords running in the profile tips and pivot into their extended or nearly extended position and, in their folded position, swivel into a side position have a side-by-side position, preferably a jib of a self-assembling tower crane, which can be folded like an accordion in its transport position,
characterized,
that the articulated connection is an articulated joint (50, 53) which can pivot about intersecting axes (50, 53), and that a support structure (56-58) is connected to a lattice girder (13, 33) in the region of the articulation a rod (62) pivotally connected to the other lattice girder is articulated in such a way that a second articulated connection (55) is produced at a distance from the first joint (67) and has a pivot axis in the vicinity of the first joint (67) (53) forms, which runs approximately at right angles to the longitudinal beams of the triangular profiles (13, 33) in such a way that the lattice beams (13, 33) lying one above the other can be folded up into an extended position via this pivot axis. Lattice girder according to claim 1, characterized in that the pivotable Rod (62) supported by stiffening rods and about an axis of rotation in the Art on the boom part (33) is foldable that this support structure in the transport position (Fig. 9) does not increase the installation space upwards. Lattice girder according to claim 1 or 2, characterized in that at a distance a detachable articulated connection (68) from the first joint (67) is provided between the top chords (51, 54) around which the lattice girders are located (13, 33) after loosening the second articulated connection (55) to let.

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