| 摘要 |
<p>A tyre changing machine (2) having a self-centring platform (1) with a vertical axis (x) is provided with a safety device (5) for releasably locking on the platform (1) a wheel (4) with a tyre. The device is particularly useful during tyre-inflating operations to prevent an operator from suffering injury due to an explosion of the tyre. The device comprises a stem (8) which is vertically slidable with respect to a horizontal arm (7). the stem (8) inferiorly bearing a plate (9) interacting contactingly with the wheel placed on the platform (1). A retaining organ (11) exhibits a hole in which a vertical rod (13) which is solidly constrained to the arm (7) is inserted with a predetermined degree of play. The retaining organ is hinged to the stem (8) in such a way as to be able to assume at least one locked position in which it prevents the stem (8) from rising. <IMAGE></p> |
