| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an effective and appropriate joint structure and a concrete unit that can suppress the increase of thrust force during jointing and sufficiently improve pulling yield strength after jointing. <P>SOLUTION: A concrete unit is joined by a joint having a structure in which a pin is inserted in a pin hole. The concrete unit is mainly composed of a fitting member main body, in which a fitting member (blade without claw 2c) in a thin flat ring shape, whose inner diameter is smaller than the outer diameter of the pin by a determined dimension, and a spacer in a thin flat ring shape, whose inner diameter is larger than the inner diameter of the fitting member by a determined dimension, are alternately arranged. The shape and the inner dimension of the fitting member is set so that as the pin is fit in the fitting member, the inner peripheral part of the fitting member across the entire circumference comes in contact with the outer peripheral part of the pin. In the inner peripheral part of the fitting member, a plurality of thrust grooves 10 are radially formed. The dimension obtained by subtracting a dimension equal to 1 to 2 times the spacer thickness from the pin diameter is set as the inner diameter of the fitting member. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
