PURPOSE: To improve efficiency in execution of work with fitting of a holding member to a support member and adjustment after fitting made to be practicable easily without holding a metal plate in the support member.

CONSTITUTION: A bolt-receiving device 303 is made up by bending a piece of metal plate at a specified angle with a width available for insertion into a notched part 101 of a support member 100 provided, and a continuous-thread stud 302 is connected to a piece on one side of the metal plate. Slits 305a and 305b for fitting into the notched part 101 of the support member 100 are provided to the piece on the other side of the metal plate.