Assembly method for crane
AssigneeKobelco Construction Machinery Co., Ltd.
InventorsAkira KOYAHATA, Dairo MATSUI
Life of this patent
Estimating the term…
Abstract
Provided is an assembly method for a crane, by which method a crane including a strut can be assembled easily. The assembly method for the crane includes a strut coupling step of coupling a base end of a strut, a cylinder connecting step of extending a cylinder unit having one end supported by the strut, the cylinder unit being capable of extending/contracting, to connect the other end of the cylinder unit to the boom, a strut raising step of causing the cylinder unit to contract to raise the strut, and a strut supporting step of stretching a stretching member, such as a rear side guy line or a luffing cable, between a front end of the strut and a base end of the boom to support the strut in a raised state.
Claims6
An assembly method for a crane which includes:
- a lower travelling body capable of travelling on a travelling surface;
- an upper slewing body on the lower travelling body, the upper slewing body being slewably supported by the lower travelling body within a plane parallel to the travelling surface;
- a boom having a boom base end coupled to the upper slewing body and a boom front end located opposite to the boom base end, the boom being supported by the upper slewing body so as to be capable of rising and falling;
- a jib having a jib base end coupled to the boom front end and a jib front end located opposite to the jib base end and supporting a load-suspending cable, the jib being supported by the boom so as to be capable of rising and falling;
- and
- at least one strut having a strut base end rotatably coupled to the jib base end or the boom front end, the at least one strut having a strut front end located opposite to the strut base end, the strut front end being connected to the jib front end at least via a front side guy line, the method comprising:
- a strut coupling step of rotatably coupling the strut base end of the at least one strut to the jib base end or the boom front end;
- a cylinder connecting step of extending a cylinder unit having one end supported by one structure that is one of the at least one strut and the boom, and the other end opposite to the one end, the cylinder unit being capable of extending/contracting, to connect the other end of the cylinder unit to the other structure that is one of the at least one strut and the boom and different from the one structure;
- a strut raising step of causing the cylinder unit to contract to raise the at least one strut with the strut base end as a fulcrum;
- and
- a strut supporting step of stretching a stretching member between the strut front end of the at least one strut and a specific part of the boom, the specific part being closer to the boom base end than the boom front end, to support the at least one strut in a raised state.
Dependencies are inferred from the claim text.