| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pile driver including a leader in such a structure as to secure the rigidity of the front face of the leader on which guide pipes are mounted. <P>SOLUTION: The pile driver includes the leader formed by connecting a plurality of leader members each having a pair of guide pipes 19 joined to the front face of a square cylindrical leader main material via mounting members 19a for guiding a work device to be moved up and down, the leader being supported at its upper part by the front end of a boom erected from a base machine. The leader main material 31 of the leader member 23 supported by the tip end of the boom is formed so that the width of its front face plate 33a is greater than a joint space between the mounting members 19a. To inside corner parts thereof between the front face plate and each of side face plates 33b, reinforcing members 35 are joined, and the front ends of the reinforcing member are located on the reverse of the front face plate at a position corresponding to a joint position of the front face plate joined by the mounting members. <P>COPYRIGHT: (C)2013,JPO&INPIT |
