Traveling crane and assembling/disassembling method thereof

Traversing hoists – Having vertically swinging boom – Having means to swing boom vertically

Reexamination Certificate

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Details

C212S239000, C212S300000

Reexamination Certificate

active

07341158

ABSTRACT:
A traveling crane according to the present invention includes a hook hoisting guide sheave for guiding a hook hoisting rope from the top of a boom toward the end of a jib, and the hook hoisting guide sheave is arranged on the top of the boom in a state that the guide sheave can guide the hook hoisting rope along the upper surface of the boom by folding the rope toward an upper spreader placed at a position adjacent to a boom anchor during assembling/disassembling of the crane. Thereby, the upper spreader can be moved between the boom anchor and a far end of the boom without providing a guide sheave dedicated for moving the upper spreader. Pairs of support legs are downward provided on both sides and in front and in rear of the upper spreader and a roller is provided for each support leg, so that interference between the upper spreader during movement and obstacles on the boom upper surface can be prevented even in a horizontal movement system excellent in operating efficiency.

REFERENCES:
patent: 3037641 (1962-06-01), Potter et al.
patent: 3176854 (1965-04-01), Brown
patent: 3306470 (1967-02-01), Green et al.
patent: 4491228 (1985-01-01), Poock et al.
patent: 2005/0192732 (2005-09-01), Narisawa et al.
patent: 7-257878 (1995-10-01), None
patent: 9-278369 (1997-10-01), None
patent: 11-11874 (1999-01-01), None
patent: 11-292471 (1999-10-01), None
patent: 03/084855 (2003-10-01), None

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