Title:
PILE DRIVER
Document Type and Number:
Japanese Patent JP2015229867
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pile driver that has a leader constituted into a half-bent type and that facilitates an operation to change the leader between an operation attitude and a transport attitude and saves labor.SOLUTION: An upper leader 14b of a leader 14 is fitted to a leader fitting frame 12 to be raised backward around a leader fitting pin 17 with a back stay cylinder 19. A lower leader 14a and the upper leader 14b are connected by a pivot pin 39 and a half-bent connection pin 40. An arm 42 is fitted rotatably to one of the leader fitting frame 12 and the lower leader 14a, and a pin 44 is fitted to the other. A slide contact part of the arm 42 is applied to the pin 44, and the half-bent connection pin 40 is extracted; and a chain 30 is loosened to press a press contact part 42b against the pin 44, and the back stay cylinder 19 is shrunk to tilt the upper leader 14b backward.
Inventors:
OMOTERA KAZUMASA
Application Number:
JP2014116419A
Publication Date:
December 21, 2015
Filing Date:
June 05, 2014
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02D7/14; E21B15/00
Attorney, Agent or Firm:
Katsuichi Wakata
Mitsufumi Wakata
Mitsufumi Wakata