| 摘要 |
PURPOSE:To obtain a device executing an abrasion work on the parallelism of the vertical face of a coil spring used for an actuation trans type pore water pressure meter, especially, at an extremely higher accuracy and in a shorter time than in the past. CONSTITUTION:A belt like body 26 having abrasive grains on the surface is horizontally spread by two pulleys 22, 25, a rotating shaft 30 is vertically arranged at the upper part of this spread belt like body, a support plate 31 which supports the belt like body slidably from the lower part is provided just under the rotating shaft as well, and a weight is installed freely slidably to the rotating shaft. A coil spring 9 to be worked is placed on the belt like body with its inserting into the rotating shaft, the weight is placed on the coil spring and a abrasion work is executed on the end face of the coil spring by the horizontal motion of the belt like body and the rotation motion of the coil spring. |
