| 摘要 |
<p>PURPOSE:To provide a truck detector for a linear motor type conveyor in which a track can be effectively detected. CONSTITUTION:The truck detector for a linear motor type conveyor comprises first comparing means 6a for sensing that a detection signal of a magnetic sensor 5a arranged on the ground to detect a sensor plate 5B in which N- and S-poles mounted on a truck are alternately arranged is a preset first threshold value or more, and second comparing means 6b for sensing that it is a preset second threshold value or more of a lower value than that of the means 6a. Further, the detector comprises switch means 7 for outputting a decision signal to be output from the means 6b after detection when the signal is outputted from the means 6a to a predetermined truck sensing function or outputting a detection signal to be output from the means 6b after its detection when the signal is output from the means 6b to a truck sensing function.</p> |
