| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle having a fitting means capable of regulating the movement of a pipe material in the axial center direction.SOLUTION: On either one side surface of an upper surface Aa of an upper block piece A1 of a block located on the lower side which supports a pipe material and a lower surface Ba of a lower block piece B1 of a block located on the upper side which supports a pipe material brought into contact with the upper surface Aa, a first concave streak groove 5 of a straight line shape extended at a predetermined angle with respect to the axial center direction C of the pipe material held by both concave parts 4, 7 is disposed, on the position separated by a prescribed distance from the first concave streak groove 5, a first protrusion 6 is disposed and, on the other side surface, a second protrusion 9 which slides within the first concave streak groove 5 and a second concave streak groove 8 which is disposed such that the first protrusion 6 slides in the range of permitting the sliding of the second protrusion 9, are disposed. |
