| 摘要 |
PURPOSE: A penetration sleeve is provided to improve the work efficiency by automatically coupling a nut and a bolt coupled to a clamp. CONSTITUTION: A penetration sleeve(10) comprises a coupling member(12) in which a connection hole(12a), a nut accommodation unit(12b), and a guide piece(12c) are formed. A protective cap(20) protecting a nut and a bolt is inserted into the coupling member. The nut coupled to the bolt is inserted into the lower part of the coupling member, and the guide piece supports a bottom surface and the side of the nut. The nut is inserted into the nut accommodation unit, and the protective cap covers the nut accommodation unit before concrete is placed on the slab of the building. A clamp is simply connected by the bolt because the nut is included in the coupling member in advance. |
