A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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
【課題】地盤改良作業の際に、リーダ下部のラックギヤにセメントミルクが付着することを防止できる杭打機を提供する。【解決手段】杭打機は、前面にラックギヤを有するリーダをベースマシンの前部に備え、ラックギヤの下部を構成する下部ラックギヤ部材３１ｃの前面及び側面を覆う略コ字状のリーダラックカバー４１と、軸部材であって軸中央から両側の端部に向けて所定の位置にそれぞれ段差ができるように軸径が細まった周溝４２ａを有する係止ピン４２とを備え、下部ラックギヤ部材３１ｃの裏には係止ピン４２を挿通可能なピン挿通部４６を備え、リーダラックカバー４１の側面の後部のうち、上部に、係止ピン４２を挿通可能な主孔４３ａと、周溝４２ａと係合する副孔４３ｂとを有するダルマ穴状のピン挿通孔４３を備え、下部に、リーダラックカバー４１装着時に、下部ラックギヤ部材３１ｃの背面に位置する規制部４５を備えている。【選択図】図６
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
【課題】地盤改良作業の際に、リーダ下部のラックギヤにセメントミルクが付着することを防止できる杭打機を提供する。【解決手段】杭打機は、前面にラックギヤを有するリーダをベースマシンの前部に備え、ラックギヤの下部を構成する下部ラックギヤ部材３１ｃの前面及び側面を覆う略コ字状のリーダラックカバー４１と、軸部材であって軸中央から両側の端部に向けて所定の位置にそれぞれ段差ができるように軸径が細まった周溝４２ａを有する係止ピン４２とを備え、下部ラックギヤ部材３１ｃの裏には係止ピン４２を挿通可能なピン挿通部４６を備え、リーダラックカバー４１の側面の後部のうち、上部に、係止ピン４２を挿通可能な主孔４３ａと、周溝４２ａと係合する副孔４３ｂとを有するダルマ穴状のピン挿通孔４３を備え、下部に、リーダラックカバー４１装着時に、下部ラックギヤ部材３１ｃの背面に位置する規制部４５を備えている。【選択図】図６
PILE DRIVER
杭打機
YAMAGUCHI AITO (author)
2021-03-01
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen