| 摘要 |
It is applicable principally to bolts which secure bodies and objects such as, for example, lorry spare wheels, which may be stolen simply by removing the nut used for tightening this type of securing bolt. The system consists of a unit formed by two parts, one formed by a bush 3 which screws onto the actual bolt 1 and the other 8 which can be engaged with the previous one in order to allow the screwing and unscrewing thereof; or, alternatively, it may be capable of being arranged with free rotation with respect to said bush 3 in order to prevent the unscrewing of the latter, the piece 8 having a bolt 12 integral with a locking element 13 housed in a longitudinal, eccentric orifice 10 of said piece 8, via which bolt 12 mutual locking or unlocking of the pieces 3 and 8 is achieved by means of the actuation of the locking element 13. A bush 16 which surrounds and protects the threaded bush 3 is integral with the piece 8. <IMAGE>
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