| 摘要 |
PROBLEM TO BE SOLVED: To provide a sampling device in a geological survey by boring capable of securely cutting a geological sample taken into a sampling cylinder off the ground by pulling up a device main body, preventing its fall during pulling up or generation of disorder in the sample, and avoiding generation of disorder in taking it out of the sampling cylinder. SOLUTION: The device main body 1 is provide with a head cover 4, an outer cylinder 5, a center shaft 6, a guide block 7, a piston 8, a sampling cylinder 9 connected to the piston 8, and a clutch mechanism 10 to the center shaft 6 of the piston 8, it is composed so that by introducing pressure water into a cylinder chamber 11, the piston 8 is unlocked to be lowered till the sampling cylinder 9 gets into the ground E at a bottom part of a bored hole 3, the guide block 7 is composed so that a rubber ring 72 slidable to gas-tightly get in contact with an inner circumferential surface of the sampling cylinder 9 is sandwiched between a block main body 70 and a tightening ring 71, the upper side and the lower side inside the sampling cylinder 9 are gas-tightly shielded from each other, the center shaft 6 is composed to be parted to a long shaft main body 6a and a short lower shaft body 6b, and it is attached to the block main body 70 of the guide block 7 at a lower end part of the lower shaft body 6b.
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