Transport vehicle system

A transport vehicle system comprising:

• an overhead transport vehicle including a lifter including a gripper to grip an article and operable to be lifted and lowered by a plurality of suspenders;
• a measurer to measure a measurement target portion;
• a measured portion including the measurement target portion thereon;
• a controller configured or programmed to cause the lifter to be lifted and lowered according to a predetermined set value;
• a maintenance trestle provided in a traveling area of the overhead transport vehicle and on which a placement table of the measurer is provided;
• and
• a communicator to wirelessly transmit a result of measurement of the measured portion made by the measurer to the controller;
• wherein
• the measured portion is a first unit grippable by the gripper;
• the measurer is a second unit placeable on the placement table;
• the first unit is placeable on the maintenance trestle in a state of being supported by the second unit placed on the placement table;
• and
• the controller is configured or programmed to cause the gripper to grip the first unit in a state of being supported by the second unit at the placement table of the maintenance trestle and cause the lifter to lift so that the second unit in a state of being placed on the placement table is able to measure the first unit gripped by the gripper, and correct the set value based on a measurement result of the first unit transmitted via the communicator from the second unit in a state of being placed on the placement table.

A transport vehicle system comprising:

• an overhead transport vehicle including a lifter including a gripper to grip an article and operable to be lifted and lowered by a plurality of suspenders;
• a measurer to measure a measurement target portion;
• a measured portion including the measurement target portion thereon;
• a controller configured or programmed to cause the lifter to be lifted and lowered according to a predetermined set value;
• wherein
• the overhead transport vehicle includes:
• a winding drum to lift and lower the lifter by winding and unwinding the suspenders;
• at least one guide roller around which the suspenders unwound from the winding drum are wound;
• a body supporting the winding drum and the guide roller;
• and
• at least one position adjuster to move a connection portion of the suspenders with the lifter in a lifting-and-lowering direction by moving a relative position of the guide roller with respect to the body;
• wherein
• the controller is configured or programmed to control a movement of the guide roller by the at least one position adjuster based on information about inclination of the lifter;
• the controller is configured or programmed to control lifting and lowering of the lifter so that the measurer is able to measure the measured portion by one of the measurer and the measured portion gripped by the gripper and by the other of the measurer at a predetermined position and the measured portion at a predetermined position, and correct the set value based on a result of measurement of the measured portion made by the measurer;
• and
• the set value includes the information about inclination.