Patent ID: 8424352

Claim:
An apparatus for manufacturing a barrel coil spring, comprising: a pair of machine frames ( 11 and 11 ′), which are installed on rear and front sides of an upper surface of a base frame ( 10 ), and include linear motion guides ( 110 and 110 ′) installed on opposite sides of upper surfaces of the pair of machine frames; a pair of forward and backward transfer units ( 12 and 12 ′) installed on the upper surfaces of the machine frames ( 11 and 11 ′) such that first sides thereof are coupled to upper surfaces of the linear motion guides ( 110 and 110 ′) and such that the first sides thereof move along the linear motion guides ( 110 and 110 ′) at the same time in opposite directions; a pair of coilers ( 13 and 13 ′) installed on upper ends of the forward and backward transfer units ( 12 and 12 ) and cooperating with the first sides of the forward and backward transfer units ( 12 and 12 ′) to thereby move from the rear and front sides toward a middle part of the base frame ( 10 ), the pair of coilers each being rotatably operated at the same time in opposite directions while moving from a first side toward a second side of the base frame ( 10 ), or from the second side toward the first side of the base frame ( 10 ) to thereby coil opposite sides of a spring material ( 2 ) at the same time; and a pair of guides ( 14 and 14 ′) installed on the upper surface of the forward and backward transfer units ( 12 and 12 ′) so as to be located beside the coilers ( 13 and 13 ′), supporting the spring material ( 2 ), and adjusting pitch and diameter of the spring material ( 2 ) coiled by the coilers ( 13 and 13 ′) while moving in cooperation with the coilers ( 13 and 13 ′).