Locking mechanism for roll-off hoist

A hoist bed for pivotal mounting to a frame of a container hoist and for selectively restraining a roll-off container, comprising:

• an elongate bed having a slot formed therein, thereby defining a guide;
• a container stop extending from said bed, the container stop precluding movement of the container in a first direction beyond a predetermined position on the bed;
• a movable plate mounted in the guide, the movable plate being freely movable under the influence of gravity through the guide, between a locking position and an unlocking position so that:
• when the movable plate is in the locking position, the movable plate projects out from the guide so as to restrain the roll-off container;
• and
• when the movable plate is in the unlocking position, the movable plate is withdrawn into the guide away from the roll-off container to thereby release the roll-off container, the movable plate and guide cooperating so that the movable plate is urged out of the guide and into the locking position by the frame as the container hoist is moved to a transport orientation, wherein the movable plate is positioned so as to cooperate with the container stop, the movable plate being arranged so that when the movable plate is in the locking position, the movable plate precludes movement of the container in a direction opposite that of the first direction.

A container hoist for loading, unloading and transporting a roll-off container, the container hoist comprising:

• a frame;
• a hoist bed pivotally mounted to the frame;
• and
• at least one locking mechanism for selectively restraining a roll-off container to the hoist bed, said at least one locking mechanism including a guide formed in the hoist bed and a movable plate mounted in the guide, the movable plate of said at least one locking mechanism being freely movable under the influence of gravity through the guide, between a locking position and an unlocking position, so that:
• when the movable plate is in the locking position, the movable plate projects out from the guide so as to restrain the roll-off container;
• and
• when the movable plate is in the unlocking position, the movable plate is withdrawn into the guide away from the roll-off container to thereby release the roll-off container, the movable plate and guide cooperating so that the movable plate is urged out of the guide and into the locking position by the frame when the container hoist is moved to a transport orientation.