REFERENCE SPHERE INSTALLATION DEVICE AND REFERENCE SPHERE SYSTEM

To provide a device which facilitates installation and removal of a reference sphere and then, can change the direction of the reference sphere without changing the center position of the reference sphere.SOLUTION: A reference sphere installation device is a device for installing a reference sphere on a support part and includes: a body 41 whose one end is fixed to the support part and has a groove 40 at the other end; a shaft body 42 whose one end is fixed to a reference sphere 26 and the other end is rotatably inserted into the groove 40; and fixing means 43 which is provided on the body 41 and comes into contact with the shaft body 42 inserted into the groove 40 to inhibit the rotation of the shaft body 42.SELECTED DRAWING: Figure 4 【課題】基準球の設置および取り外しが容易になり、基準球の中心位置を変えることなく、基準球の向きを変えることが可能な装置を提供すること。【解決手段】基準球の設置装置は、支持部上に基準球を設置するための装置であり、一端が支持部に固定され、他端に溝４０を有する本体４１と、一端が基準球２６に固定され、他端が溝４０に回転可能に挿入される軸体４２と、本体４１に設けられ、溝４０に挿入された軸体４２と接触して軸体４２の回転を抑止させる定着手段４３とを含む。【選択図】図４