PURPOSE: An apparatus for correcting telescope of coil is provided which is capable of correcting telescope of the outer coiling part more effectively correspondingly to specification of coil. CONSTITUTION: The apparatus for correcting telescope of coil comprises a plural vertical cylinders(21) installed at both sides of a saddle (S) on which coil (C) is put so that the vertical cylinders(21) are vertically driven; a plural vertical moving bodies(22) which are fixed to rod of the vertical cylinders(21), and on the upper horizontal plane of which guiding rails are formed to face the saddle (S); a plural horizontal moving bodies(23) installed so that they are slidingly moved along the guiding rails of the vertical moving bodies(22) by a cylinder(22b); a plural disks(25) which are fixed to the horizontal moving bodies(23) so that the disks(25) are directed oppositely to the side surface of the coil (C) put on the saddle (S), and at the center of which a through hole(25a) is formed; a bar radially movably installed at the disks(25) by a cylinder; and a reel(24) which is installed at the horizontal moving bodies(23) so that the reel(24) passes through the through hole(25a) by a cylinder(24a) to be moved to the coil (C) side, and the outer diameter of which is contracted and expanded, wherein the apparatus further comprises a telescope measuring part(30) comprising rail(31), rack(32), pinion(33) and sensor(37), and wherein the apparatus further comprises a coil outer coiling unwinding preventing part(10) comprising rack(11a), pinion(11b), driving motor(11c), moving body(12), arm(15), cylinder and snubber roll.
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