Positioning and clamping device and positioning device

A positioning device that positions a clamping object for fitting a work piece to be machined or a metal mold, relative to a base member, the positioning device comprising:

• a protruding shaft provided on the base member;
• an annular engagement member provided on the clamping object, so as to be fitted on the shaft;
• an annular tapered surface that is formed on the outer periphery of the shaft for positioning the clamping object in the horizontal direction and has a decreasing diameter toward the axial tip of the shaft;
• and
• an annular engaging mechanism that is formed on an inner periphery side portion of the annular engagement member, so as to be capable of engaging with the annular tapered surface and of elastically deforming in the radial direction, in an engaged state with the annular tapered surface, said engaging mechanism including a tapered ring portion capable of making a face contact with the annular tapered surface, and multiple ribs being circumferentially spaced apart and extending radially outward from the tapered ring portion.

A positioning and clamping device, comprising:

• a clamping object for fitting a workpiece to be machined or a metal mold;
• a base member including a protruding cylindrical shaft;
• a clamping mechanism that pulls down and clamps the clamping object for fitting a work piece to be machined or a metal mold, to said base member, said base member including a protruding cylindrical shaft;
• an annular engagement member provided on the clamping object which is fittable on the cylindrical shaft;
• and
• a positioning mechanism that positions the clamping object in horizontal and vertical directions in relation to the base member, the positioning mechanism including an annular tapered surface and an annular engagement mechanism engageable with the annular tapered surface, said annular tapered surface being formed on a one of an outer periphery of the cylindrical shaft or an inner periphery of the annular engagement member, and said annular engaging mechanism being formed on a remaining one of said inner periphery of the annular engagement member or the outer periphery of the cylindrical shaft, said annular tapered surface presenting a decreasing diameter toward an axial tip of the cylindrical shaft, said annular engaging mechanism being elastically deformable in a radial direction in an engaged state with the annular tapered surface, said annular engaging mechanism including a tapered ring portion contactable with the annular tapered surface and including ribs being circumferentially spaced apart and extending radially from the tapered ring portion so as to define open spaces therebetween.

A positioning device that positions a clamping object for fitting a work piece to be machined or a metal mold, relative to a base member, comprising:

• a protruding shaft provided on the base member;
• an annular engagement member provided on the clamping object, so as to be fittable on the shaft;
• and
• an annular engagement mechanism engageable with an annular tapered surface formed on a one of an outer periphery of the cylindrical shaft or an inner periphery of the annular engagement member, and said annular engaging mechanism being formed on a remaining one of said inner periphery of the annular engagement member or the outer periphery of the cylindrical shaft, said annular tapered surface presenting a decreasing diameter toward an axial tip of the cylindrical shaft, said annular engaging mechanism being elastically deformable in a radial direction in an engaged state with the annular tapered surface, said annular engaging mechanism including a tapered ring portion contactable with the annular tapered surface and including ribs being circumferentially spaced apart and extending radially from the tapered ring portion so as to define open spaces therebetween.