Machine tool

A machine tool, comprising:

• a door that closes an opening provided in a cover that forms a machining area at the time of machining and opens the opening when nothing is being machined, wherein the moving speed of the door for opening and closing the opening is changeable;
• a drive unit configured to move the door;
• a controller configured to control the drive unit, receive a safety signal from an outside of the machine tool, and set the moving speed of the door to a first moving speed in the case where a safety signal is received or to a second moving speed in the case where no safety signal is received;
• and a load detection unit configured to detect the load applied to the door, wherein the first moving speed is higher than the second moving speed, and in the case where a load having a threshold value or higher is applied to the load detection unit, the door is stopped, a drive force for the door is cut off, or the door is driven in the direction opposite the direction in which the door was moving at the point in time when the load was applied.