Sides thrust device, in particular for a shelf operating equipment

摘要

A material handling vehicle including a platform, a carriage projectable and retractable with respect to the platform, at least one load support member or fork mounted on the carriage, and an elongated, telescopable extension or sheath on the load support member. An arrangement of pulley wheels and a flexible connecting member is provided to project and retract the extension with respect to the load support member, in response to the projection and retraction of the carriage. A "lost motion" mechanism is provided which permits a desired "pretravel" of the carriage before movement of the extension occurs, and this period of lost motion is repeated when the carriage is being retracted to its normal position.