Patent ID: 11872695
Assignee: FANUC CORPORATION
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A robot system comprising:
an articulated robot including:
a robot mechanical unit having at least one arm;
a gas spring provided in the at least one arm and configured to act as a gas balancer that alleviates a load on a servomotor that drives the at least one arm; and
a controller that is configured to control the robot mechanical unit; and
a maintenance management apparatus configured to manage the maintenance of the gas spring, the maintenance management apparatus comprising:
a gas pressure measuring unit configured to directly measure a gas pressure inside the gas spring with a pressure sensor on a regular basis;
a maintenance judgement unit configured to judge that no abnormality is present in the gas spring, judge maintenance to be performed on the gas spring is charging gas, and calculate a remaining time until the gas pressure decreases to a predetermined pressure threshold, when an amount of decrease in the gas pressure per unit time or per unit operating distance is equal to or smaller than a predetermined threshold; and
a notifying unit configured to conduct a notification related to the remaining time to an operator.