An object of the present invention is to retain the ability to work in easy and narrow and low ground clearance site is loading and unloading to the mountainous areas, the penetration capability also has a need enough 10~15m, for geological survey that can be carried out standard penetration test It will provide a boring device. With the A rod holder 1, it is attached to the lift frame 3 in the vertical detachably on the base 2 fixed to the ground G in the anchor 12, equipped with a pressure lever 4a for lowering the same lifting frame 3 Install the downward electric core drill 5 to freely vertically movable and desorption, the boring rod 5 with a sampler 6 to the rotating portion 4b of the electric core drill 4 connected detachably through the rod holder 1, raise the same boring rod 5 winch It was provided a scaffold 8 having a pulley 9 which hung a 7 wire 10 of the upper side of the base 2. .BACKGROUND
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