| 摘要 |
PURPOSE: A concrete reinforcing bar bending machine is provided to accurately bend the concrete reinforcing bar to a desired angle by freely controlling and accurately setting stroke distance in which piston of bending cylinder is moved back and forth. CONSTITUTION: In a concrete reinforcing bar bending machine comprising a bending worktable(10) on which the working surface is formed so that the concrete reinforcing bar(2) is put on the working surface, and on both sides of the upper part of which a plural fixed dies(11) are mounted with being spaced apart from each other in a certain distance, a bending cylinder(20) comprising a pressing bending member(21) which is integrally assembled with the bending worktable(10) and mounted on the bending cylinder(20) so that the pressing bending member(21) is moved back and forth to the central part between the fixed dies(11) to press the concrete reinforcing bar(2), and a rotational support for rotationally supporting the bending cylinder(20) by supporting the center of gravity of the lower part of the bending cylinder(20), the concrete reinforcing bar bending machine is characterized in that a forward moving side operation rod(22) comprising first and second sensor induction members (B1,B2) that are connected to enable position controlling is arranged at one side of the bending cylinder(20), and a backward moving side operation rod(23) comprising a backward moving sensor induction member (B3) that is connected to enable position controlling is arranged at the other side of the bending cylinder(20) so that the forward and backward moving side operation rods(22,23) are connected to the front end of a piston(20a) of the bending cylinder(20) to be integrally operated, first and second sensing sensors (S1,S2) are installed at one side of the lower part of the bending worktable(10) to sense the first and second sensor induction members (B1,B2) of the forward moving side operation rod(22), and a backward moving sensing sensor (S3) is installed at the other side of the lower part of the bending worktable(10) to sense the backward moving sensor induction member (B3) of the backward moving side operating rod(23).
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