HOLDING MECHANISM FOR FOLDABLE SIDE RAILS

摘要

The conventional holding mechanism for foldable side rails have such problems that the release lever can be accidentally pressed for release action and that if a double lock is employed for preventing it, automatic holding action cannot be performed. This invention proposes a holding mechanism for foldable side rails, characterized in that the holding mechanism 4 is provided at an end of an upper horizontal rail member 1u and comprises a mechanism support member 5 connected with the stanchion member provided at said end; the mechanism support member 5 has a stopper pin set 12 capable of advancing and receding; the stopper pin set 12 is biased in the advancing direction by a spring 13; the stanchion member has a fitting hole 10 allowing the stopper pin set 12 to be fitted in it when the stanchion member is kept erect; the mechanism support member further has a release lever 6 engaged with a mechanically driven trigger site 15 provided in connection with the stopper pin set for making the stopper pin set recede against the force of the spring; a play mechanism is provided between the release lever and the mechanically driven trigger site; and the mechanism support member further has a release prevention mechanism for preventing the movement of the release lever in the release allowing direction.