| 摘要 |
PROBLEM TO BE SOLVED: To perform smooth insertion of a tool in mounting hole of a spindle. SOLUTION: When a push rod 2 is advanced to the left from a state shown at an upper half, a cylinder member 2b is fitted in the connection cylinder part Ta for a coolant of a tool holder (tool) T, pressure receiving surfaces 12b and 12c are pressed by the press surface 2d and 2e to expand a collet 12, and a fixing edge Tb is locked to a fixing part 12d. Since a taper surface 2c for backward movement axially externally pushes the moving member 17, a backward movement member 16 is moved to the right to move backward the collet 12, and a tool holder T is attracted to a spindle 1 (refer to a lower half). When the push rod 2 is moved backward, a moving member 17 is returned to its original state through the force of an energizing spring 18. |
