| 摘要 |
An automatic product advance mechanism for dispensing merchandise on vending machines shelves is presented. A combination of electronic and mechanical components enables the disclosed system to automatically adjust for dispensing different product packaging formats and dimensions. Protected by a front clear gate-shield the products are loaded on an upright position on top of a base-rack, escorted by interchangeable column dividers and supported by a sliding carrier back-sled. The system operates by energizing a gear motor pivot ably connected to a crank-slider mechanism driving eccentrically a ratcheting pawl assembly that pushes the carrier back-sled towards the front end of said base-rack and simultaneously opens the clear gate-shield until the first product loaded to the furthermost position is dispensed. On its downfall trajectory the product passes through an optical sensor beam that signals the system electronic interface board to immediately reverse direction of the gear motor revolution returning the mechanism to its home and rest position simultaneously closing the clear gate-shield and preventing the next product to fall.
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