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1. 发明申请

WO2003091532A1 アースドリル用掘削具审中-公开
标题翻译：钻井钻机
公开(公告)号：WO2003091532A1
公开(公告)日：2003-11-06
申请号：PCT/JP2002/004143
申请日：2002-04-25
申请人：日立建機株式会社 , 野崎敏 , 安部隆 , 新井修 , 新井一弘
发明人：野崎敏 , 安部隆 , 新井修 , 新井一弘
IPC分类号： E21B11/04
CPC分类号： E02F3/47 , E21B7/003 , E21B7/02
摘要： A drilling device (2) for an earth drill, wherein locking bodies (3d, 3j) are provided on an inner member (3) connected to a kelly-bar (1) and a locking body receiving part (6f) is provided on an outer member (6), the outer member (6) comprises a cylindrical bucket (7) and an openable bucket (8) contained in the cylindrical bucket (7), the locking bodies (3d, 3j) are locked to the locking body receiving part (6f) by rotating the inner member (3) in forward direction when the drilling device (2) is in the fully retracted state to prohibit the vertical movement of the inner member (3) relative to the outer member (6), a force in pull up direction is given to the kelly-bar (1) to rotate the drilling device with a load smaller than the weight of the drilling device (2) applied to a drilled object by rotating the drilling device so that a drilling can be performed using an earth drill with a small drive force and the large drilling device (2), and a projection (3k) provided on the outer periphery of the inner member (3) is movably fitted in vertical direction to a guide rail vertically installed on the inner periphery of a second member (5) so that a ground obstacle can be removed by rotating in the state of being held by the openable bucket (8).
摘要翻译：一种用于地钻的钻孔装置（2），其中锁定体（3d，3j）设置在连接到凯利杆（1）和锁定体接收部分（6f）的内部构件（3）上，外部构件（6），外部构件（6）包括圆筒形桶（7）和容纳在圆筒形桶（7）中的可开启桶（8），锁定体（3d，3j）被锁定到锁定体接收当钻孔装置（2）处于完全缩回状态以禁止内部构件（3）相对于外部构件（6）的垂直运动时，通过使内部构件（3）沿向前方向旋转，使部分（6f）通过旋转钻孔装置，向钻杆（1）施加向上拉力的力以使钻孔装置以小于施加到钻孔物体的钻孔装置（2）的重量的载荷旋转，使得钻孔可以使用具有小驱动力的大地钻和大钻孔装置（2）执行，以及设置在外侧的突出部（3k）内部构件（3）的外围可以垂直地安装在垂直安装在第二构件（5）的内周上的导轨上，从而可以通过在被可打开的状态下保持的状态下旋转而移除地面障碍物水桶（8）。

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