Door opening/closing robot and door opening/closing system

A door opening/closing robot comprising:

• a base provided at a position different from a conveyance line on which a vehicle body is conveyed;
• a first arm attached to the base to rotate around a first axis extending along a vertical direction, and extending away from the first axis;
• a second arm attached to the first arm to rotate around a second axis parallel to the first axis, and extending away from the second axis;
• a third arm attached to the second arm to rotate around a third axis parallel to the first axis, and extending in a direction intersecting the third axis and away from the third axis;
• and
• a fourth arm attached to the third arm to extend along the vertical direction at a distal end of the third arm, and configured to move a tool capable of holding a door attached to the vehicle body along the vertical direction and rotate around a fourth axis parallel to the first axis,
• wherein the fourth arm holds the tool to be movable up and down such that the tool passes through a window frame of the door,
• in the vertical direction, a connected portion between the third arm and the fourth arm is lower than an uppermost position of the second arm and the third arm,
• the second arm and the third arm are provided to operate below the door of the vehicle body that is being conveyed along the conveyance line, and
• in the vertical direction, at least a portion of the distal end of the third arm and at least a portion of the second arm are positioned at a same height.