Title:
TOWER CRANE
Document Type and Number:
Japanese Patent JP2005145569
Kind Code:
A
Abstract:
To prevent contrarotating of a strut at the time of both of crane working and assembling/disassembling.
In the tower crane, the strut 7 is attached to a tip end portion of a tower boom 3 so as to rotate in a fore-and-aft direction, and a jib is rising/falling supported by the strut 7. A back stop 12 is provided on a back surface side of the strut 7, and both of first and second back stop receivers 15, 16 are provided at a tip end portion of the tower boom 3. The back stop 12 is received by the first back stop receiver 15 at the time of crane work, and received by the second back stop receiver 16 at the time of assembling/disassembling, thereby restricting a backward falling angle.
More Like This:
Inventors:
MIYA EIJI
NAEKURA TOMOYA
NAEKURA TOMOYA
Application Number:
JP2003380956A
Publication Date:
June 09, 2005
Filing Date:
November 11, 2003
Export Citation:
Assignee:
KOBELCO CRANES CO LTD
International Classes:
B66C23/88; B66C23/82; (IPC1-7): B66C23/88; B66C23/82
Attorney, Agent or Firm:
Etsushi Kotani
Takao Ito
Jiro Higuchi
Muramatsu Toshiro
Takao Ito
Jiro Higuchi
Muramatsu Toshiro