Patent ID: 8517360
Filing Date: 2013-08-27
Classification: B23Q,B25B

Abstract:
1. A clamp device having an annular grip member capable of expanding and contracting in a radial direction, of being inserted into a hole in a workpiece and of gripping an inner circumferential surface of the hole, and a clamp rod including a tapered shaft portion fitted into and engaged with the grip member, comprising: a support mechanism for supporting the grip member when a diameter of the grip member is expanded; a clamping fluid pressure cylinder capable of driving the grip member and the clamp rod forwards and backwards in the axial direction; and a main body member to which the grip member, the clamp rod, the support mechanism, and the clamping fluid pressure cylinder are installed; wherein the grip member, the clamp rod, and the support mechanism are positioned laterally at one end portion of the main body member in a horizontal direction, with a vertical axis of the grip member and the clamp rod, which is parallel with a vertical axis of the clamping fluid pressure cylinder, being offset from the vertical axis of the clamping fluid pressure cylinder in a horizontal direction orthogonal to the clamp rod; wherein the grip member and the clamp rod are adapted to be movable in the horizontal direction orthogonal to the clamp rod; and further comprising an L shaped link member formed like L shape, that links together the clamp rod and a piston member of the clamping fluid pressure cylinder so as to move together.