Penetration piston, soil testing machine, and moving method of lower unit of penetration piston

摘要

Problem: it is possible to quickly carry out the work before and after penetration of the penetration piston into the specimen.The penetration piston 1 can be rotated by the lower unit 1a and the engagement member 4 in the vertical direction by using the handle 3 provided on the side surface of the shaft 2.By rotating the lower unit 1A using the handle portion 3 after the upward sliding, the engaging portion 4C can be engaged with the upper surface 62 of the intermediate member 6, and the engaging member 4 can be accommodated in the accommodating portion 71 of the upper member 7.After the downward slide, the lower portion 1a is rotated while the spring seat 54 is pushed down by using the handle portion 3, and the engaging portion 4C is held between the lower surface 63 of the intermediate member 6 and the upper surface of the spring seat 54.Diagram