Abstract: A management device for managing an operation of a cargo transportation vehicle that autonomously travels on a road with no driver and that is able to store cargo in each of a plurality of storages shielded by doors that are opened and closed includes a receiver configured to receive request information about transportation of the cargo from a user, an operation determiner configured to determine the operation of the cargo transportation vehicle so that the cargo transportation vehicle arrives at a delivery destination of the cargo, a registrant configured to register a plurality of users pre-designated as recipients of the cargo, and a processor configured to perform a process of controlling a control mechanism of the storage so that the recipient is able to unload the cargo from the storage when an authentication process on the recipient registered by the registrant has succeeded.

Abstract: The present invention relates to a counter feed mechanism as used in digital clock comprising a cam member adapted for advanced rotation and another cam member adapted for delayed rotation both arranged on a common axis so that the advanced rotation of the first-mentioned cam member under a drive force transmitted from a clock mechanism twists a coil spring stretched between both cam members, which is, in turn, charged with energy for rotation of the second-mentioned cam member and, upon rotary displacement of the first-mentioned cam member by a predetermined angle, said second cam member is released to be rotated at once so as to advance a rotary wheel step by step.