| 摘要 |
A positioning apparatus for positioning an object in respective axis directions of an X-axis, a Y-axis perpendicular to the X-axis, and a Z-axis orthogonal to the X-axis and the Y-axis and positioning the object around the Z-axis within a plane parallel to the X-axis and the Y-axis is provided. A fastener detachably fastens the retainer. A gap is formed between a first reference surface of the retainer and the second reference surface of the fastener when a fixing shaft of the retainer is inserted into a fixing hole of the fastener, an outer surface of a pyramid part of the fixing shaft fits to an inner surface of the fixing hole and the object is positioned in the X-axis direction and the Y-axis direction. The first reference surface and the second reference surface come into contact with each other when a fastening part of the fastener pulls the fixing shaft, the pyramid part or the fixing hole elastically deforms, and the fixing shaft is further pulled into the fixing hole with maintaining the fitting between the outer surface of the pyramid part and the inner surface of the fixing hole. |
| 主权项 |
1. A positioning apparatus for positioning an object in respective axis directions of an X-axis, a Y-axis perpendicular to the X-axis, and a Z-axis orthogonal to the X-axis and the Y-axis and positioning the object around the Z-axis within a plane parallel to the X-axis and the Y-axis, the positioning apparatus comprising:
a retainer; and a fastener being configured to detachably fasten the retainer, wherein the retainer includes:
a fixing part having a first retainer surface and a second retainer surface opposite to the first retainer surface and being configured to fix the object on the first retainer surface thereof;a fixing shaft having an axis which extends in the Z-axis direction and positions the object in the X-axis direction and the Y-axis direction and protruding from the second retainer surface of the fixing part; anda first reference surface being disposed at a side of the second retainer surface of the fixing part and being arranged perpendicular to the axis of the fixing shaft, wherein the fixing shaft is formed integrally with the fixing part and has a tapered pyramid part which decreases in size at a constant angle toward a free end thereof and which is formed coaxially with the fixing shaft, wherein each of intersection angles between adjacent sides of the pyramid part is the same and each of two ends between the adjacent sides is connected by a curve being outwardly convexed from the axis of the fixing shaft in a cross-sectional view perpendicular to the axis of the fixing shaft, wherein the fastener includes:
a body part having a first fastener surface and a second fastener surface opposite to the first fastener surface,a fixing hole being formed in the first fastener surface of the body part and having an inner surface which corresponds to the pyramid part of the fixing shaft so that a whole outer surface of the pyramid part can come into close contact with the inner surface of fixing hole,a second reference surface being disposed at a side of the first fastener surface of the body part and being arranged perpendicular to an axis of the fixing hole so that the first reference surface can come into contact with the second reference surface, anda fastening part being configured to pull the fixing shaft which is inserted into the fixing hole toward the second fastener surface of the body part; wherein the fixing shaft or the fixing hole is configured such that a gap is formed between the first reference surface and the second reference surface when the fixing shaft is inserted into the fixing hole, the outer surface of the pyramid part fits to the inner surface of the fixing hole and the object is positioned in the X-axis direction and the Y-axis direction, and is configured such that the first reference surface and the second reference surface come into contact with each other when the fastening part pulls the fixing shaft toward the second fastener surface of the body part, the pyramid part or the fixing hole elastically deforms, and the fixing shaft is further pulled into the fixing hole with maintaining the fitting between the outer surface of the pyramid part and the inner surface of the fixing hole, wherein the pyramid part is formed with a hole in the cross-sectional view perpendicular to the axis of the fixing shaft, to form a plurality of elastic wall portions on respective sides of the pyramid part between the outer surface of the pyramid part and the through hole, and wherein the respective sides of the pyramid part are formed at center portions thereof with recesses which are smoothly recessed by a predetermined depth with respect to straight portions formed at both sides of the center portions of the respective sides in the cross-sectional view perpendicular to the axis of the fixing shaft, to form a plurality of thin-walled portions at the respective elastic wall portions; wherein the fastening part comprises:
a first fastening member including:
a male thread portion at one end, the male thread portion being configured to be screwed into a female thread portion which is arranged along the axis of the fixing shaft and provided in the fixing shaft,a rotating portion at the other end, the rotating portion being configured to rotate the male thread portion, anda pair of flange portions being spaced apart from each other with a predetermined gap and being disposed between the male thread portion and the rotating portion, wherein the first fastening member is capable of being inserted through the fixing hole of the fastener in a state where the male thread portion is screwed into the female thread portion and the first fastening member is fixed to the fixing shaft, anda second fastening member being configured to be inserted through an insertion hole portion formed on one surface of the fastener and fitted into the predetermined gap between the flange portions in a state where the fixing shaft is inserted into the fixing hole and the retainer is positioned in the X-axis direction and the Y-axis direction.
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