Patent ID: 7220089

Claim:
A tool mounting device for a turning center in which: rotating tools and turning tools are exchanged and used, wherein a mounting engagement unit for engaging a tapered shank provided to the base end of a tool is disposed on a main shaft that is rotatably mounted on a ram via a support unit; a clamp mechanism is disposed for clamping a clamping convexity of said tapered shank by the retracting of a drawbar and drawing in and engaging said tapered shank to the mounting engagement unit to mount/fix tools to said main shaft so as to allow the shank to be clamped and released based on the reciprocating control of said drawbar; and the clamp mechanism is configured to actuate said clamping by retracting said drawbar with a retracting force produced by an elastic member, and to return said drawbar and release said clamping by pushing/driving against the retracting force of a drawbar driving device, comprising: said drawbar that rotates together with said main shaft being rotatably mounted on a reciprocating driver which is driven by said drawbar driving device to push/drive said drawbar; a stopper being provided to said drawbar or to a location that moves together with the drawbar; a support unit for supporting said stopper and blocking the drawbar from returning from the retracted clamp position of said drawbar being provided to said reciprocating driver or to a location that moves together with the reciprocating driver; said stopper being configured so as to make no contact with said support unit and to maintain a rotation allowance gap therebetween when at least said drawbar is retracted by the retracting force produced by said elastic member and said rotating tool is clamped/fixed, and so as to be brought to a return blocking state in which said reciprocating driver is retracted by said drawbar driving device by an amount equal to at least the rotation allowance gap and said stopper can be supported by said support unit when a turning tool is clamped/fixed; a wedge mechanism being provided in which a reciprocatingly movably disposed wedge is moved/driven by a wedge driving device to engage a wedge engagement unit and to engage and lock the retracted clamp position of the drawbar in a state in which the reciprocating driver is retracted and brought to a return blocking state; and a cylinder device being provided as said drawbar driving device has a release position for pushing/driving said drawbar against the retracting force of said elastic member and releasing the clamp on said rotating tool or said turning tool, a first clamp position for clamping/fixing said rotating tool by the retracting force produced by said elastic member, and a second clamp position for moving said stopper into said return blocking state that allows said support unit to be supported and clamping/fixing said turning tool in a state in which the position is engaged/locked by said wedge mechanism.