| 摘要 |
<p>A simplified crane that travels overhead, adapted to eliminate troubles involved in moving the crane along straight and curved rails and travel smoothly. Also, a simplified crane that is light in weight, simple, portable, and of small-scale. The simplified crane that travels overhead comprises a shaft in girder rails, spherical bearings holding the girder rails, one of which spherical bearing has a bearing function in a range of fixed solid angle in a semispherical path, the other spherical bearing having a bearing function in a range of fixed solid angle in a semispherical path and a shift function in a range of fixed solid angle, and a shift absorber unit connected to the spherical bearing. The simplified crane that is of small scale further comprises expansible struts and props, and foldable rails, and is arranged so that it can be installed on scaffolding pipes or building bodies.</p> |
