杭打機

Japanese Patent JP7313974

B2

To provide a pile driver that can prevent cement milk from adhering to a rack gear under a leader during ground improvement work.SOLUTION: A pile driver comprises a leader with a rack gear on the front surface at the front of a base machine, and comprises a substantially U-shaped leader rack cover 41 that covers the front surface and side surfaces of a lower rack gear member 31c that constitutes a lower portion of the rack gear, and a locking pin 42 which is a shaft member and has a peripheral groove 42a whose shaft diameter is narrowed so that a step is formed at a predetermined position from the center of the shaft toward the ends on both sides. A pin insertion portion 46 through which the locking pin 42 can be inserted is provided on the back of the lower rack gear member 31c. A dharma hole-shaped pin insertion hole 43 having a main hole 43a through which the locking pin 42 can be inserted and a sub hole 43b that engages with the peripheral groove 42a is provided at the upper portion of the rear portion of the side surface of the leader rack cover 41, while the lower portion of the rear portion is provided with a regulating portion 45 located on the back surface of the lower rack gear member 31c when the leader rack cover 41 is attached.SELECTED DRAWING: Figure 6

JPS60164512	BACK STAY GUIDE FOR PILE DRIVER
JPS591749	[Title of the device] Piled Leiber's backstay backlash prevention device

Aito Yamaguchi

JP2019152909A

July 25, 2023

August 23, 2019

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Nippon Vehicle Manufacturing Co., Ltd.

E02D7/16

JP2007217953A
JP2016118010A
JP2016079605A
JP2001323466A
JP2014173382A
JP9151455A
JP7031964U
JP63096140U
JP2001227291A
JP57193734U

US6039508

Yoshihiko Kido
Kazuhiko Kido

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