To provide a connection piece to connect tightening bolts used to tighten and integrate adjacent concrete blocks with each other capable of performing a tightening work without any trouble even when the axes of the bolts are slightly deviated without using any left-hand screw.
An end plate 22 having a through hole 27 is fixed to both ends of a cylindrical body 21, and a long nut 23 having a flange 24 on a base end is inserted in the through hole freely in the radial direction with the flange on the inner side. In another structure, an end plate 22 having a through hole 27 is fixed to the other end of the cylindrical body 21 with a nut in the axial direction fixed to one end, and a long nut 23 having a flange 24 on a base end is inserted in the through hole freely in the radial direction with the flange on the inner side.
HIRAKI YUKICHI
NITTA HIROYUKI
TOEI CONCRETE IND CO LTD