Mechanism for attaching tool holder to turret

A mechanism for attaching a tool holder to a turret, the mechanism comprising an angle adjustment mechanism, and a fixing mechanism that fixes the tool holder to the turret, wherein the angle adjustment mechanism comprises:

• an angle adjustment block composed of a prism including first opposing side faces inclined relative to a direction along the rotation axis of the turret in plan view, and second opposing side faces parallel to each other;
• first and second adjustment blocks disposed to sandwich the angle adjustment block in plan view, include inclined faces that are brought into surface contact with respective first opposing side faces, and composed of prisms that are movable in directions along the rotation axis of the turret,
• a depression formed in the tool holder, configured so that the angle adjustment block is movable, and includes a guide face opposing one of the second opposing side faces of the angle adjustment block, and a pair of guide faces with which the first and second adjustment blocks are movable in a direction crossing an arrangement direction of the first and second adjustment blocks while being in contact with the opposing faces of the inclined faces of the first and second adjustment blocks,
• first and second adjusters that move the first and second adjustment blocks in a direction along the rotation axis of the turret while the angle adjustment block and the first and second adjustment blocks are accommodated in the depression, and
• a first positioning member conducting positioning between the turret and the tool holder, and a second positioning member conducting positioning between the turret and the angle adjustment block.