| 摘要 |
PURPOSE:To exactly pack the space between two planes with a wedging effect by a method in which the first part and the second part are coupled in a slidable manner on the slantly crossed cylindrical face, and the second part and the third part are coupled in a slidable manner on the slantly crossed cylindrical face crossing said slantly crossed cylindrical face. CONSTITUTION:A packer to be packed between two planes A and B, corresponding to a waling back and a sheathing in the sheathing and timbering work consists of the first, second, and third parts 1, 2, and 3. One end 1a of the first part 1 is provided with a plane and the other end of the part is provided with a cylindrical face 1b having the same curvature radius over the whole length, in which the axial line is slantly crossed with the plane 1a. In the second part 2, one end is provided with a cylindrical face 2a slidable on the cylindrical face 1b of the first part 1 and the other end is provided with a cylindrical face 2c of the same curvature radius over the whole widthwise direction, in which the axial line is crossed with the face 2a. In the third part 3, one end is provided with a cylindrical face 3a slidable on the cylindrical face 2c and the other end is provided with a plane 3b. |
