JPS5695421A - Bending device for metallic parts - Google Patents

Abstract

PURPOSE: To improve the reliability and simplification of the 60 degrees bending work for the tail end of a steel bar, the prevention for the steel bar from swelling, and the fixation of the top end of the steel bar, by specially constituting a guiding block, and by additionally arranging a hook- bending roller and a backup roller, in the bending device for pressing the steel bar while it is restrained by the roller.

CONSTITUTION: The guiding block 17 of the bending device 1 to obtain the looped material of the reinforcing iron bar, etc., is provided with a soild bridge 19 in a specified breadth located diagonally; on both sides of the solid bridge 19, the floor levels are made different; in the deeper floor 21, a chucking cam 20 is installed. The top end of the steel bar 2 is held between the chucking cam 20 and the solid bridge 19, and then, the motor 8 is driven; hereby, the shafts 10, 11, 12, of the power transmission 9 turn around and also the working table 18 and the guiding block 17 turn around togehter. Hereby, the steel bar 2 is turned around integrally with them and is bent by the press roller 15. The swelling of the steel bar 2 at the side tangential to the rotation, between two bending corners is retrained by the backup roller 16, and the swelling of the steel bar 2 at the opposite side to the side following to above stated bending corners is restrained by additionally arranged backup roller 36. With one turn of the shaft 11, the shaft 12, that is the table 18, almost 450 degrees thrns; and with a half turn of the shaft 35, the hook-bending roller 25 approaches the guiding block 17; hereby, the tail end of the steel bar is bent toward the shaft 12; after the next half turn, the hook-bending roller 25 returns to the initial position.

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