| 摘要 |
A tumbler type jack stone is provided to let users grasp the jack stones by erectly standing the jack stones by disposing the center of gravity at the lower side although the user rolls the jack stones at random. The tumbler type jack stone is composed of a body(10) split into tumbler-shaped upper and lower body parts(10A,10B) and integrally joined by a combining unit, and provided with a placing face(12) formed on the bottom side and a weight(20) contained in the body and fixed by a support unit to set the center of gravity at the lower side. The combining unit comprises an insertion groove and a sill formed on the correspondent faces of the upper and lower body parts and attached by an adhesive agent and female and main screw units or a hanging groove and a sill combined to each other. |
