| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball slider capable of being lowered and moving a heavy article with a small force, having high resistance to the heavy article. SOLUTION: This ball slider 10 includes a disc-shaped upper plate member 12. At the periphery of the upper plate member 12, a side member 14 with L-shaped cross section is formed so as to enter the underside of the upper plate member 12. Between the upper plate member 12 and the side member 14, a ring-shaped space 16 is formed which inclines so as to lower more as it goes to the inside of the upper plate member 12. A plurality of spherical bodies 18 are formed at the underside of the upper plate member 12 and a space 16. At the outer periphery of the space 16, a space 20 capable of moving the spherical body is formed.
|
