PURPOSE: To improve a workability of a hanger device and facilitate an adjustment of a position of a main body by a method wherein a hanger bolt is held at its predetermined position from its both sides with a half nut having a tapered part at its extreme end and at the same time the tapered end is inserted into a round hole of the hanger device, the hanger device and the half nut are fitted together to hang the main body.

CONSTITUTION: A hanger bolt 4 is held at its both sides with a half nut 6 and at the same time an extremity end of a tapered part 7 of a half nut 6 is inserted into a round hole 3 of a hanger member 1. With such an arrangement, the half nut 6 is formed in the same manner as that of an integral nut with the weight of a main body 2, and then the hanger member 1 and the half nut 6 are fitted to each other to enable the main body 2 to be hung at its predetermined position. In this case, the half nut 6 can hold any optional position of the hanger bolt 4 from both sides, a hanging position of the main body 2 can be easily changed or determined for its position. Even after hanging the main body 2, a positional adjustment of the main body 2 can be facilitated by rotating the half nut 6.