| 摘要 |
PROBLEM TO BE SOLVED: To increase the number of dishes on the conveyer for a circulating-dish sushi restaurant and to achieve effective radio signal transmission and receive between the antenna of a charging machine and the antenna coil on each dish in a bill-charging system using ID tags. SOLUTION: A dish 1 has a crescent shape in which a part of the circumference is recessed in a circular shape. A dish 1 is put on a conveyer such that the circular recessed portion 28 meets the circular circumference of the next dish 1. A bottom rim 27 has a circular recessed portion 29. The head of a charging machine has a circular convex shape. Radio communication is achieved by bringing each transmission and receive antenna mounted in the circular convex shape close to the antenna coil 2 of the dish 1. |
