Lattice piece element and lattice piece for crane boom

Abstract

The present invention relates to a lattice piece for a crane boom consisting of a first and a second lattice section element, each comprising a first chord member which extends substantially parallel to the longitudinal direction of the lattice section element, a second chord member which extends substantially parallel to the longitudinal direction of the lattice section element, a first web member which is firmly connected with the first chord member and the second chord member, and preferably extends in the plane defined by the first chord member and the second chord member, wherein a first web member is firmly connected with the first chord member and rises from a plane defined by the first chord member and the second chord member, wherein at its end facing away from the first chord member the second web member includes a fastening means for a releasable connection.

Claims

1. A lattice piece for a crane boom with a first and a second lattice piece element (1; 2), each comprising: a first chord member (11; 21) which extends substantially parallel to the longitudinal direction of the lattice piece element (1; 2), a second chord member (12; 22) which extends substantially parallel to the longitudinal direction of the lattice piece element (1; 2), a first web member (13; 23) which is fixed to the first chord member (11; 21) at a first end and fixed to the second chord member (12; 22) at a second end and extends in a plane defined by the first chord member (11; 21) and the second chord member (12; 22), and a second web member (14; 24) which is fixed to the first chord member (11; 21) at a first end and extends in a plane from the first chord member (11; 21) which is substantially perpendicular to the plane defined by the first and second chord members (11, 21:12, 22), such that each said lattice piece element (1; 2) is substantially L-shaped when viewed in the longitudinal direction of the lattice piece element (1; 2), wherein at an end facing away from the first chord member (11; 21), the second web member (14; 24) has first fastening means (15; 25) for a releasable connection, second fastening meat (16; 26) are located on the second chord member (12, 22); in a first state, the first lattice piece element (1) and the second lattice piece element (2) are connected with each other such that second fastening means (16) at the second chord member (12) of the first lattice piece element (1) is releasably connected with the first fastening means (25) at the second web member (24) of the second lattice piece element (2) and the first fastening means (15) at the second web member (14) of the first lattice piece element (1) is releasably connected with the second fastening means (26) at the second chord member (22) of the second lattice piece element (2), such that the two Interconnected lattice piece elements (1;2) substantially correspond to a rectangular shape in their cross-section, and in a second state the first lattice piece element (1) and the second lattice piece element (2) are connected with each other such that the first fastening means (15) at the second web member (14) of the first lattice piece element (1) is releasably connected with the first fastening means (25) at the second web member (24) of the second lattice piece element (2) in a perpendicular orientation of the second web members (14; 24) to the plane defined by the first and second chord members (11; 12; 21; 22), such that the two interconnected lattice piece elements (1; 2) substantially correspond to a U-shape in their cross-section.

2. The lattice piece (20) according to claim 1, comprising: at least one grating element (30) which is releasably attached to the second fastening means (16) of the second chord member (12) of the first lattice piece element (1) and to the second fastening means (26) of the second chord member (22) of the second lattice piece element (2), by fastening means (31) which correspond to the first fastening means (15; 25) of the second web member (14; 24).

3. The lattice piece according to claim 2, wherein the grating element is configured to releasably fix a footplate (40) centrally in a width direction thereof.

4. The lattice piece according to claim 2, additionally comprising reinforcing struts (50) arranged to support the lattice piece elements (1; 2) on the at least one grating element (30).

5. The lattice piece according to claim 2, wherein the at least one grating element (30) has the shape of a K in the plane which is substantially perpendicular to the plane defined by the first and second chord members (11, 21;12, 22).

6. The lattice piece) according to claim 2, wherein the at least one grating element (30) has the shape of an outcrossing in a plane which is substantially perpendicular to the plane defined by the first and second chord members (11, 21;12, 22).

7. The lattice piece element (1; 2) for a lattice piece according to claim 1, wherein the second chord member (12; 22) includes several second fastening means (16; 26) which are distributed along the longitudinal direction of the second chord member (12; 22).

8. The lattice piece element (1; 2) according to claim 7, wherein the first fastening means (15; 25) arranged at the second web member (14; 24) are configured to cooperate with the second fastening means (16; 26) arranged on the second chord member (12; 22).

9. The lattice piece element (1; 2) according to claim 7, wherein arrangement positions of the second fastening means (16; 26) of the second chord member (12; 22) and the first fastening means (15; 25) of the second web member (14; 24) are identical based on the longitudinal direction of the lattice piece element (1; 2).

10. The lattice piece element (1; 2) according to claim 7 4, wherein the several second fastening means (16; 26) of the second chord member (12; 22) are arranged equidistantly to each other in the longitudinal direction of the second chord member (12; 22).

11. The lattice piece element (1; 2) according to claim 7, wherein the first fastening means (15; 25) at the second web member (14; 24) is identical to or matching with the second fastening means (16; 26) at the second chord member (12; 22).

12. The lattice piece element (1; 2) according to claim 7, furthermore comprising a footplate (40) which is firmly attached to the lattice piece element.

13. The lattice piece element (1; 2) according to claim 1, wherein the fastening means (15; 16; 25; 26) at the second chord member (12; 22) or the second web member (14; 24) forms a bolt connection, and is either a fork or a finger of a fork-finger connection, or a fork of an asymmetrical fork-fork connection.

14. The lattice piece element (1; 2) according to claim 13, wherein the fastening means (15; 16; 25; 26) at the second chord member or the second web member accommodates a bolt in the longitudinal direction of the lattice piece element (1; 2) or a direction extending transversely to the longitudinal direction of the lattice piece element (1; 2) and parallel to the plane formed by the first chord member (11; 21) and the second chord member (12; 22).

15. The lattice piece element (1;2) according to claim 13, wherein the first fastening means (15; 25) comprise fork-finger connections identically arranged along the longitudinal direction of the lattice piece elements (1;2) or alternatingly arranged along the longitudinal direction of the lattice piece elements (1;2).

16. The lattice piece element (1; 2) according to claim 1, wherein the second web member (14; 24) extends obliquely or vertically from the first chord member (11; 21) and the number of first and second web members is at least as large as the number of the second fastening means (16; 26) at the second chord member (12; 22).

17. The lattice piece element (1; 2) according to claim 1, comprising a footplate (40) which is releasably mountable in the longitudinal direction on an outside of the first lattice piece element.

18. The lattice element (1; 2) according to claim 17, wherein the footplate (40) is releasably mountable as unit with guy rods.

19. A crane boom comprising the lattice piece according to claim 1.

20. A method for transporting a lattice piece according to claim 1, wherein the lattice piece is transported in a non-broadened condition and an interior space defined by the lattice piece is utilized for transporting other crane components.

21. The lattice piece element (1; 2) according to claim 1, wherein the first web member (13; 23) is fixed to the first chord member (11; 21) and the second chord member (12; 22), and the second web member (14; 24) is fixed to the first chord member (11; 21) and extends in the plane from the first chord member (11; 21) which is substantially perpendicular to the plane defined by the first and second chord members (11, 21;12, 22).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further features, details and advantages of the invention will be explained with reference to the Figures discussed below, in which:

(2) FIG. 1: shows a perspective view of two interconnected lattice piece elements according to the invention with a walkway grid,

(3) FIG. 2: shows a perspective view of two interconnected lattice piece elements according to the invention,

(4) FIG. 3: shows two lattice piece elements according to the invention in a disassembled state,

(5) FIG. 4: shows two lattice piece elements according to the invention with interconnected web members,

(6) FIG. 5: shows a lattice piece in a broadened configuration with a grating element,

(7) FIG. 6: shows the lattice piece in the broadened configuration with a walkway grid,

(8) FIG. 7: shows a lattice piece comprising two lattice piece elements according to the invention in a non-broadened configuration,

(9) FIG. 8: shows a half-mounted broadened lattice piece,

(10) FIG. 9: shows a fully mounted broadened lattice piece with central walking surface,

(11) FIG. 10-FIG. 15: show various embodiments of the fastening means at the second web member and/or the second chord member,

(12) FIG. 16: shows a broadened lattice piece whose grating element includes a K-bond, and

(13) FIG. 17: shows a broadened lattice piece whose grating element has a rhombic pattern.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(14) FIG. 1 shows a perspective view of two interconnected lattice piece elements 1; 2 according to the invention. Each lattice piece element 1; 2 includes a first chord member 11; 21 and first web members 13; 23 connected with the first chord member 11; 21, which at their end facing away from the first chord member 11; 21 are firmly connected with the second chord member 12; 22. From the plane formed by the first chord member 11; 21 and the second chord member 12; 22 at least one second web member 14; 24 extends vertically, which at its end remote from the first chord member 11; 21 comprises a fastening means 15; 25. This fastening means is releasably connected with a fastening means 16; 26 provided at the second chord member 12; 22. This results in a lattice piece of a crane boom which in its rectangular cross-section has a chord member 11; 12; 21; 22 at each of its corner points of the cross-section. On an outside defined by two chord members there is also mounted a walkway grid 40, so that the boom is walkable during assembly/disassembly. It also is possible to provide receptacles for depositing and arresting guy rods on both sides of the walkway grid.

(15) FIGS. 1 to 6 show a reconstruction variant from a non-broadened state of a lattice piece (FIG. 1) to a broadened lattice piece (FIG. 6) in a chronological sequence. Two variants are conceivable here for the broadening of the section, wherein in the following a first variant is explained, which has an open side pointing upwards to be closed by a grating element.

(16) Initially, all connections at the non-broadened lattice piece 1; 2 are separated, so that the lattice piece element 1 located at the top can be lifted off. The lattice piece element 1 located at the top is characterized by the fact that the second web members 14 are arranged on the side remote from the ground.

(17) FIG. 2 shows the non-broadened lattice piece 1; 2, wherein the walkway grid 40 has been removed already.

(18) FIG. 3 shows a disassembled lattice piece in which the two lattice piece elements 1; 2 are detached from each other. The respective fastening means accordingly no longer cooperate with their counterpart.

(19) Subsequently, the lattice piece element 1 is rotated such that it points downwards with its second web members 14. It then is possible to attach the fastening means 15 at the second web member ends 14 to the corresponding fastening means 25 of the second lattice piece element 2 and connect the same with each other. FIG. 3 shows a state of the two lattice piece elements 1; 2 in which the fastening means previously connected with each other are released.

(20) FIG. 4 then shows the two interconnected lattice piece elements 1; 2, wherein the fastening means 15, 25 at the two second web members 14; 24 are connected with each other. In this way, an approximately U-shaped structure with a side open towards the top is obtained in cross-section. This open side is closed with separate grating elements 30, which on both sides are connected to the free fastening means 16; 26 at the chord members 12; 22. Subsequently, reinforcing struts 50 extending in the cross-sectional plane are attached. The grating element 50 likewise can be assembled from a plurality of individual elements or consist of one single element.

(21) FIG. 5 shows the lattice piece in a state in which the open side of the construction produced by the two lattice piece elements has been closed with a grating element 30. The grating element 30 includes fastening means 31 which can cooperate with the fastening means of the chord members.

(22) FIG. 6 finally shows the broadened lattice part with a walkway 40 extending in longitudinal direction, which ensures walkability of the lattice piece during assembly or also in future operation.

(23) In a second variant, a reconstruction from non-broadened to broadened is illustrated with reference to FIGS. 7 to 9, in which the open side of the structure formed by the two lattice piece elements 1; 2 faces towards the bottom.

(24) FIG. 7 shows the provision of grating elements 30 on the ground or on a separate assembly substructure. On the same, the grating elements 30 are aligned and connected with each other. In addition, all connections at the non-broadened lattice piece are separated and the lattice piece element 1 located at the top is lifted off and connected with the fastening means 16 of the second chord members 12 at the fastening means 31 of the prepared grating elements 30. The attached lattice piece 1 then can be supported on the grating element 30 by means of reinforcing struts 50 (cf. FIG. 9, reference numeral 50). The second lattice piece element 2 subsequently is rotated such that it is pointing upwards with the previous underside, i.e. its second web members 24 now are facing away from the side close to the ground. With the fastening means 25 of the second web members 24 the second lattice piece element 2 is attached to the second web members 14 of the first lattice piece 1 and connected with the same. At the same time the fastening means 26 of the second chord member 22 are connected with the fastening means 31 of the grating elements 30. In addition, the spatial diagonal of the second lattice piece element 2 (reinforcing strut 50) is attached.

(25) For the fastening means 15; 16; 25; 26; 31 releasable connecting means are conceivable. Preferably, the same are designed as bolt connection.

(26) FIGS. 10 to 15 show various designs of the bolt connections.

(27) There are two different possibilities of arranging the bolts. On the one hand, a bolt can be provided in longitudinal direction of the lattice piece element or the bolt can be arranged perpendicularly to the longitudinal direction vertical to a bottom plane.

(28) In an arrangement of the bolts in longitudinal direction, the assembly of the lattice piece element or the reconstruction from a non-broadened to a broadened configuration is greatly simplified, as the lattice piece elements and the additional outcrossing elements (grating elements 30) can be inserted into each other more easily.

(29) FIG. 10 shows an arrangement pattern in which the fastening means can be a positive or a negative terminal. This is the case, for example, in a fork-finger connection. Matching fastening means then each have a positive and a negative section half. In the illustrated Figure, the fastening means 25 for example is a fork in which the fastening means 15 can engage with its finger. By means of a bolt insertable in longitudinal direction the connection of the two fastening means thus can be made.

(30) The fastening means 26 at the second lattice piece element 2 is a fork, whereas the fastening means 16 at the first lattice piece 1 is a finger.

(31) FIG. 11 shows an alternative arrangement of the fastening means. Again, all fastening means consist of a fork or a finger, wherein the fork constitutes a negative section and a finger constitutes a positive section. In contrast to FIG. 10 the fastening means of the second web member or the second chord member are not identical, but alternate along the longitudinal direction of the lattice piece 1; 2.

(32) FIG. 12 shows the fastening means in the form of asymmetrical connections, as they occur in a fork-fork-connection. There are obtained two identical lattice piece elements with regular arrangement.

(33) FIGS. 13 to 15 show fastening means which can be attached to each other by means of bolts to be introduced vertically. The advantage here is that the construction is simplified.

(34) FIG. 13 again shows the arrangement of fastening means with positive and negative terminals, as it is typical for a fork-finger connection. One of two fastening means to be connected with each other has a positive section half and the other one has a negative section half.

(35) FIG. 14 again shows a fork-finger connection which can be achieved with the fastening means, but were two identical section halves are arranged alternately in longitudinal direction.

(36) FIG. 15 shows fastening means which include terminals asymmetrical to each other, such as a fork-fork connection, wherein two identical lattice piece elements with mutually rotated arrangements are possible.

(37) FIG. 16 shows a perspective view of a broadened lattice part, in which the grating element 30 or the plurality of grating elements 30 for closing the side of the lattice part open towards the top corresponds to the pattern of a K-bond. A K-bond consists of several K-shaped elements which are joined and then together form the end of the open side. When broadening the section, the open side of the U-shaped lattice structure (depending on whether the open side lies at the top or at the bottom) is closed with one or more additional grating elements 30. The grating elements 30 therefor are connected to the free fastening means 16; 26 of the two lattice piece elements 1; 2. The additional grating 30 can be designed demountable in one part or in several parts. Advantageously, the individual elements have dimensions which provide for road transport without any problems. It also is advantageous when the individual elements of the grating 30 can be stacked.

(38) For the grating 30 virtually all commonly used patterns can be used, such as e.g. a K-bond as shown in FIG. 16 or an outcrossed or rhombic pattern.

(39) FIG. 17 shows a grating element 30 which has a pattern of an outcrossing. The first and the last cross here has a post 32 (both are identical), the other one or more identical inner crosses have no post 32.