An attachment structure for a door lock device includes (1) a rod provided at an outer side section, that is disposed such that a length direction of the rod is in the vehicle vertical direction, and that is coupled to a door outer handle to move vertically upon operation of the door outer handle; (2) a releasing section provided at an inner side section, that includes a joining section to which the rod is joined from the vehicle width direction outside, and that releases a locked state of the door lock device upon vertical movement of the rod; (3) a restricting section provided at the outer side section, and that restricts movement of the rod toward the vehicle width direction outside and in the vehicle front-rear direction; and (4) a guiding section provided at the releasing section, and that guides the rod into the joining section.

An attachment structure for a door lock device includes (1) a rod provided at an outer side section, that is disposed such that a length direction of the rod is in the vehicle vertical direction, and that is coupled to a door outer handle to move vertically upon operation of the door outer handle; (2) a releasing section provided at an inner side section, that includes a joining section to which the rod is joined from the vehicle width direction outside, and that releases a locked state of the door lock device upon vertical movement of the rod; (3) a restricting section provided at the outer side section, and that restricts movement of the rod toward the vehicle width direction outside and in the vehicle front-rear direction; and (4) a guiding section provided at the releasing section, and that guides the rod into the joining section.

A rotary actuator includes a plurality of plate members stacked and coupled together for rotation relative to each other. A biasing member provides a biasing force tending to cause a rotatable end plate member to rotate in a biasing direction relative to a non-rotatable end plate member. Each plate member has a plurality of notches at its periphery. A SMA wire extends through the plurality of notches so that as the SMA wire is heated, the SMA wire rotates each rotatable plate member from a cold position in a direction opposite the biasing direction to a hot position. As the SMA wire cools, the biasing member rotates each rotatable plate member in the biasing direction from the hot position and returns each rotatable plate member to the cold position.

A rotary actuator includes a plurality of plate members stacked and coupled together for rotation relative to each other. A biasing member provides a biasing force tending to cause a rotatable end plate member to rotate in a biasing direction relative to a non-rotatable end plate member. Each plate member has a plurality of notches at its periphery. A SMA wire extends through the plurality of notches so that as the SMA wire is heated, the SMA wire rotates each rotatable plate member from a cold position in a direction opposite the biasing direction to a hot position. As the SMA wire cools, the biasing member rotates each rotatable plate member in the biasing direction from the hot position and returns each rotatable plate member to the cold position.

A control system for a construction machine includes a tilt sensor for detecting an inclination angle of the construction machine parked on a slope, a door latch device including a lock/unlock actuator configured to lock/unlock a door of the construction machine according to a door lock control signal and a door unlock control signal and a release actuator configured to release the door according to a door release control signal, and a smart key module configured to output the door unlock control signal and the door release control signal when the inclination angle of the construction machine is within a preset safe range in case that an unlocking event signal is detected while a smart key is recognized.

A control system for a construction machine includes a tilt sensor for detecting an inclination angle of the construction machine parked on a slope, a door latch device including a lock/unlock actuator configured to lock/unlock a door of the construction machine according to a door lock control signal and a door unlock control signal and a release actuator configured to release the door according to a door release control signal, and a smart key module configured to output the door unlock control signal and the door release control signal when the inclination angle of the construction machine is within a preset safe range in case that an unlocking event signal is detected while a smart key is recognized.