| 摘要 |
<p>A self-orientating twin castor of the type that comprises: a supporting body, having a substantially vertical wall (3); a slot (4), vertically elongated and passing through the wall (3); a shaft (5), driven through the slot (4); a pair of wheels (2) associated with the opposite ends of the shaft (5); a vertical receptacle (7), which is provided in the wall (3) and is axially offset with respect to the shaft (5); a pivot (10), being rotatable in the receptacle (7) for connecting the castor (1) to a piece of furniture; two tubular portions (11), which protrude from opposite sides of the vertical wall and are substantially coaxial to the shaft (5); a substantially vertical hole (16), which is provided in the wall above the slot (4) and is connected thereto; a spring (15), accommodated in the hole (16) and acting on the shaft (5); the hole (16) being open upwards and closed by a closure element (18) which acts as abutment for the spring (15). <IMAGE></p> |
