To always set optimal clamping force by appropriately strongly clamping the knob of a fixture without adjusting the clamping force.

On the upper surface of a moving table 5 of a table device 2, a first fixture 6 to fix a key material, and a second fixture 7 to fix a key model are installed. Each of the fixtures 6, 7 is provided with a screw axis 41 vertically mounted on the moving table 5, a pair of clamping plates 22, 23 vertically arranged on the screw axis 41 so as to face each other, and a knob 24 which fixes the key model or the key material by applying clamping force between the clamping plates 22, 23 corresponding to a screwing amount against the screw axis 41. An idling mechanism 80 which idles the knob 24 against the screw axis when the clamping force exceeds a set value is incorporated in the inside of the knob 24.