Patent ID: 8704663

Claim:
A work provided with a direction determining function, communicating with a direction determining device at a predetermined communication position and determined by the direction determining device as to whether to assume a normal posture or a reverse posture, wherein the direction determining device includes an antenna communicating with an IC tag, and a determination circuit determining the magnitude of communication intensity during the communication; wherein the IC tag capable of communicating with the direction determining device is secured to an upper surface of the work at a predetermined position; wherein the IC tag is configured as a passive tag type including a substrate, an IC module and an antenna coil, the IC module and the antenna coil being disposed on the substrate adjacent to each other; wherein the antenna coil is disposed on the substrate in an offset manner so that a communication distance between the antenna coil and a communicable zone of the antenna of the direction determining device is different in magnitude on the basis of a difference in the posture of the work at the predetermined communication position; wherein the work is shaped as a rectangular parallelepiped and is provided with two compartments; wherein respective mouths of the two compartments are opened in an upper surface of the work at anteroposteriorly symmetrical positions and the IC tag is disposed between the mouths; and wherein the antenna coil is disposed in an offset manner on one of front and rear sides of the substrate constituting the IC tag, and the IC module is disposed on the other side.