Cab for work machine and work machine

1. A cab for a work machine, the cab comprising:

a cab body which is formed with a doorway;

a door which is rotatably supported on the cab body so as to open and close the doorway;

a biasing member which biases the door in a closing direction; and

an actuator that generates a driving force to move the closed door in an opening direction,

wherein the biasing member biases the door in the closing direction when a rotation angle of the door relative to the cab body is in a first angle range which includes a fully closed state, and biases the door in the opening direction when the rotation angle is in a second angle range which includes a fully open state and is larger than the first angle range.

2. The work machine cab according to claim 1 , wherein

the actuator further generates a driving force to move the opened door in the closing direction.

3. The cab for a work machine according to claim 2 , further comprising a power transmission device that transmits the driving force generated by the actuator to the door,

the power transmission device includes a play member, and

the play member provides a play that prevents the driving force generated by the actuator from being transmitted to the door.

4. The cab for a work machine according to claim 3 , wherein

while the door is being moved in the closing direction, the play member transmits the driving force generated by the actuator to the door if the rotation angle is in the second angle range, and prevents the drive force generated by the actuator from being transmitted to the door if the rotation angle is changed from the second angle range to the first angle range.

5. A work machine comprising:

a work implement; and

a cab according to claim 1 , in which an operator who operates the work implement is seated.