| 摘要 |
<p>A device for arresting the swivelling movement of a castor (3), especially those on the front of shopping trolleys, comprises a plate (10) secured to the base of the trolley, and a tongue adapted to pivot (12) between first and second positions (11, 11A). In the first position, the tongue is engaged between the arms of the fork member (4) to prevent swivelling movement of the castor (3). In the second position (11A), the tongue is disengaged from between the arms to permit swivelling movement of the castor (3). The tongue may be automatically disengaged by contact of another trolley with an arm (15) connected to the tongue.</p> |
