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    • 2. 发明专利
    • Drilling equipment for in-manhole step mounting hole
    • 钻孔设备用于井下安装孔
    • JP2007023613A
    • 2007-02-01
    • JP2005207460
    • 2005-07-15
    • Nichikon:KkNippon Step Kogyo Kk日本ステップ工業株式会社株式会社ニチコン
    • NAKAZATO YASUOFUKAMACHI MITSUNORITAKAHASHI HIDEAKI
    • E02D29/12B23B45/14
    • PROBLEM TO BE SOLVED: To provide drilling equipment which enables step mounting holes to be simply and accurately drilled in the positions of both legs of a step to be mounted, and which requires little labor even in a narrow manhole.
      SOLUTION: This drilling equipment comprises: a center bar 2 which is horizontally fixed to the inside of the manhole 1 by stretching both ends against the inner surface of the manhole; a drill mounting frame 3 which is mounted on the center bar 2 in such a manner as to freely advance/retreat; and two drills 4 which are so mounted on the frame 3 as to be parallel to the longitudinal direction of the center bar 2 and bilaterally symmetrical. The drilling equipment drills a hole by concurrently advancing the two drills 4. The drill 4, which is constituted as a hollow core drill 6 having a leading end equipped with a diamond tip 8, is equipped with a water injection device 5 for discharging water from the leading end of the core drill 6. The drill can drill a precise mounting hole even in the presence of a reinforcement.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供能够在步进安装的两条腿的位置上简单且准确地钻出阶梯安装孔的钻孔设备,即使在狭窄的人孔中也需要很少的劳动。 解决方案:该钻孔设备包括:中心杆2,其通过将两端拉伸在人孔的内表面上而水平地固定在人孔1的内部; 钻头安装架3,其以自由前进/后退的方式安装在中心杆2上; 和两个钻头4,它们安装在框架3上,以平行于中心杆2的纵向方向并且是双向对称的。 钻孔装置通过同时推进两个钻头4钻孔。钻头4由具有金刚石尖端8的前端的中空钻芯6构成,配备有注水装置5,用于从 钻芯钻头的前端。钻头即使在加强件的存在下也可钻出精确的安装孔。 版权所有(C)2007,JPO&INPIT