Lattice boom
AssigneesKobe Steel, Ltd., Kobelco Construction Machinery Co., Ltd.
InventorsYasuhiro Nakashima, Shinji Sato
Life of this patent
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Abstract
Provided is a lattice boom in which a desired part can be reinforced after the lattice boom has been assembled and in which workability of the reinforcement can be improved. The lattice boom includes a plurality of main pipes, a plurality of lattice pipes, and a reinforcing part. The reinforcing part is provided on at least one of the outer circumferential surface of the main pipe and the outer circumferential surface of the lattice pipe. The reinforcing part is arranged between adjacent connecting parts among a plurality of connecting parts each connecting the main pipe and the lattice pipe. The reinforcing part includes a plurality of reinforcing members arranged along the circumferential direction of the pipe.
Claims11
A lattice boom comprising:
- a plurality of main pipes extending in a longitudinal direction of the lattice boom;
- a plurality of lattice pipes extending in a connecting direction that intersects with the longitudinal direction and each including two ends respectively connected to a pair of adjacent main pipes, among the plurality of main pipes, to connect the pair of main pipes;
- and
- a reinforcing part provided on at least one of an outer circumferential surface of a main pipe among the plurality of main pipes and an outer circumferential surface of a lattice pipe among the plurality of lattice pipes,
- the pair of adjacent main pipes being connected to each other at a plurality of connecting parts by the plurality of lattice pipes, wherein
- the reinforcing part is provided to at least one of a first area between first specific connecting parts, out of the plurality of connecting parts, adjacent to each other at a predetermined interval along the longitudinal direction on the outer circumferential surface of the main pipe and the lattice pipe, and a second area between second specific connecting parts, out of the plurality of connecting parts, on two end sides of the lattice pipe,
- the reinforcing part includes a plurality of reinforcing members that extend along an axial direction of a specific pipe, which is at least one of the main pipe and the lattice pipe, the specific pipe including the reinforcing part, and the plurality of reinforcing members being arranged at intervals on the outer circumferential surface of the specific pipe along a circumferential direction of the specific pipe,
- a length of a reinforcing member among the plurality of reinforcing members in the axial direction is set to a value less than an interval between the first specific connection parts adjacent to each other in the axial direction or an interval between the second specific connecting parts adjacent to each other in the axial direction, and
- the reinforcing member has opposite ends in the axial direction, the opposite ends being spaced from the first specific connecting parts or the second specific connecting parts on the specific pipe.
Dependencies are inferred from the claim text.