| 摘要 |
<p>In a robot arm having a closed-link mechanism between a base section and a hand, a positional shift of the hand is suppressed for moving a high-temperature work by using a robot arm. In a robot arm (100), the temperature of first prescribed links (20, 4) among a link group configuring a closed-link mechanism is a first temperature (T1), and the temperature of second prescribed links (18, 10, 2, 18) is a second temperature (T2). The first prescribed links (20, 4) and the second prescribed links (18, 10, 2, 18) are formed of different materials. The elongation rate of the length of the first prescribed links (20, 4) due to thermal expansion when the temperature is changed to the first temperature (T1) from a temperature (T0) before use is substantially the same as the elongation rate of the length of the second prescribed links (18, 10, 2, 18) due to thermal expansion when the temperature is changed to the second temperature (T2) from the temperature (T0) before use.</p> |
