| 摘要 |
The present invention relates to a drilling machine for drilling a hole in a narrow part where space is small in a concrete construction or structure. According to the present invention, the drilling machine is easily arranged in a narrow part of a construction or structure, and a vertical supporter is securely supported in the ceiling and floor of the narrow part, so the drilling work can be stably performed, and the drilling work is possible in the ceiling and floor of the narrow part. Moreover, a worker can install and operate the drilling machine easily, so the working time can be reduced. According to an embodiment of the present invention, the drilling machine comprises: a base plate where a hydraulic motor having a drill bit is vertically installed in the outside; a transfer shaft screw combined with the center of the base plate, and installed to transfer vertically; a rotation shaft combined inside the transfer shaft by a bearing, and installed to be rotated; and a supporter screw combined with the upper and lower parts of the rotation shaft, and lifted vertically and supported in the ceiling and floor of a narrow part. |
