Title:
WORKING DEVICE DROP STOPPER OF MACHINE FOR FOUNDATION WORK
Document Type and Number:
Japanese Patent JP2003193784
Kind Code:
A
Abstract:
To prevent a stopper from being unlocked from a guide by the weight of a working device when the working device is lowered too much by mistake and to easily and surely mount the stopper.
A pin hole 14a is formed as a locking hole for a pin 20 at the lower end portion of the guide 14 which guides the working device 15 in rising and falling. A through hole 17c for the pin 20 is formed in a guide gib 17b of the stopper 17 to correspond to the position of each pin hole 14a. The end of the pin 20 is inserted into the pin hole 14a through the through hole 17c and the guide gib 17b of the stopper 17 is mounted to the guide 14.
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Inventors:
YAMAZAKI TAKANORI
YOSHIDA SHIGEMITSU
YOSHIDA SHIGEMITSU
Application Number:
JP2001398035A
Publication Date:
July 09, 2003
Filing Date:
December 27, 2001
Export Citation:
Assignee:
NIPPON SHARYO SEIZO KK
International Classes:
E21B15/00; (IPC1-7): E21B15/00
Attorney, Agent or Firm:
Kido Kazuhiko