BOOM ATTACH/DETACH DEVICE OF CRANE AND BOOM ATTACH/DETACH METHOD FOR CRANE

• US 20180065832A1
• Filed: 03/18/2016
• Published: 03/08/2018
• Est. Priority Date: 03/20/2015
• Status: Active Grant

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: HANAMOTO, Takahiro
• Granted Patent: US 10,640,338 B2
• Time in Patent Office: Days
• CPC Class Codes: B66C 23/26 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail with supporting couples provided by walls or buildings B66C23/20; mounted on vehicles B66C23/36; jib constructions B66C23/64
• CPC Class Codes: B66C 23/283 with frameworks composed of assembled elements
• CPC Class Codes: B66C 23/365 dismantable into smaller units for transport purposes
• CPC Class Codes: B66C 23/42 with jibs of adjustable configuration, e.g. foldable
• CPC Class Codes: B66C 23/62 Constructional features or details of dredgers E02F

Abstract

A boom attach/detach device includes a boom, an extensible cylinder, and a boom supporting device. At least a part of the boom supporting device is arranged more to a boom front end side than an upper slewing body. When the extensible cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by a boom foot pin is cut off, the boom supporting device supports the boom to enable a rear end portion of the boom to move in a boom axis direction. The boom can be attached or detached with ease without a need to use a separate power device from a crane to suppress increases in size, in mass, and in cost of an upper slewing body.

Claims

1. A boom attach/detach device of a crane, the device comprising:

an upper slewing body;

a boom attached to the upper slewing body via a boom foot pin so as to rise and fall;

a drive cylinder provided in the upper slewing body or the boom to drive the boom; and

a boom supporting portion which supports the boom,

wherein at least a part of the boom supporting portion is arranged more to a boom front end side than the upper slewing body, and

when the drive cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by the boom foot pin is cut off, the boom supporting portion supports the boom so as to enable a rear end portion of the boom to move in a boom axis direction.

2. The boom attach/detach device of a crane according to claim 1, wherein

the boom is extensible, and

the drive cylinder is an extensible cylinder which causes the boom to extend and contract.

3. The boom attach/detach device of a crane according to claim 2, wherein

the boom supporting portion includes:

a boom front end side supporting portion; and

a boom rear end side supporting portion arranged more to a boom rear end side than the boom front end side supporting portion.

4. The boom attach/detach device of a crane according to claim 3, wherein

the boom supporting portion includes a rail extending in the boom axis direction, and

the boom rear end side supporting portion is movable in the boom axis direction along the rail.

5. The boom attach/detach device of a crane according to claim 3, wherein the boom rear end side supporting portion includes a support height changing portion which changes a part supporting the boom to have an arbitrary height.

6. The boom attach/detach device of a crane according to claim 3, wherein a plurality of the boom rear end side supporting portions are provided spaced apart in the boom axis direction.

7. The boom attach/detach device of a crane according to claim 1, further comprising a jack which lifts up the upper slewing body to an arbitrary height.

8. The boom attach/detach device of a crane according to claim 1, wherein the drive cylinder is a rising and falling cylinder attached to the upper slewing body to cause the boom to rise and fall with respect to the upper slewing body.

9. The boom attach/detach device of a crane according to claim 8, wherein the boom includes:

a bracket for rising and falling to which the rising and falling cylinder is attached when causing the boom to rise and fall; and

a coupling member for attachment/detachment which is arranged more to the boom rear end side than the bracket for rising and falling and to which the rising and falling cylinder is attachable.

10. The boom attach/detach device of a crane according to claim 8, further comprising a cylinder receiving base provided in a slewing frame of the upper slewing body to receive a cylinder tube of the rising and falling cylinder.

11. The boom attach/detach device of a crane according to claim 8, wherein

the boom supporting portion includes:

a rail extending in the boom axis direction; and

a carriage which is movable in the boom axis direction along the rail and supports the boom.

12. The boom attach/detach device of a crane according to claim 8, wherein the boom supporting portion is further provided in the slewing frame of the upper slewing body.

13. The boom attach/detach device of a crane according to claim 1, wherein the boom supporting portion is provided on a transport carriage for transporting the boom.

14. A boom attach/detach method for a crane, the crane including a boom attached to an upper slewing body via a boom foot pin so as to rise and fall;

and a drive cylinder provided in the upper slewing body or the boom to drive the boom, the method comprising

in a state where the boom is supported at a position more to a boom front end side than the upper slewing body and coupling between the upper slewing body and the boom by the boom foot pin is cut off, causing the drive cylinder to conduct extension and contraction operation to enable a rear end portion of the boom to move in a boom axis direction.

15. The boom attach/detach method for a crane according to claim 14, wherein

the boom is extensible, and

the drive cylinder is an extensible cylinder which causes the boom to extend and contract.

16. The boom attach/detach method for a crane according to claim 14, wherein the drive cylinder is a rising and falling cylinder attached to the upper slewing body to cause the boom to rise and fall with respect to the upper slewing body.