JPS6247713A - Guiding equipment for unmanned carrier - Google Patents

Abstract

PURPOSE: To reduce the cost and to increase the guidance accuracy by shunting a contact type sensor to an inactive position and activating other sensors to guide an unmanned truck in case the first type discontinuous point of a guide member is detected.

CONSTITUTION: The lateral displacement sensors 32 and 34 are attached to the side of the body 2 of a forklift 28 to detect the distance and the driving posture of the forklift 28 with a contact secured between a guide wall 30 and a guide wall surface 46. These sensors 32 and 34 contain the input and output members put into a box and are always energized toward the wall surface 46. At the same time, both sensors 32 and 34 are movable. An optical sensor detects the presence or absence of the surface 46. Then a discontinuous point is detected where the sensors 32 and 34 are shifted to a contact unable state with the surface 46 from a contact enable state with the surface 46. In such a case, both sensors 32 and 34 are shifted to the inactive positions distant away from the surface 46. While the sensors 32 and 34 are reset to the active positions when a discontinuous point to the contact enable state from the contact unable state is detected. Thus, an unmanned carrier is controlled according to the outputs of the sensors 32 and 34.

COPYRIGHT: (C)1987,JPO&Japio