Door opening and closing apparatus

A door opening and closing apparatus comprising

• a rail module including:
• a rail member extending along a front-and-rear direction and including;
• a closing inversion member provided on a first end portion of the rail member;
• and
• an opening inversion member provided on a second end portion of the rail member;
• a drive device mounted on the rail member;
• and
• a supporting member coupled to:
• a first end portion of a closing cable, a second end portion of the closing cable being connected to the drive device, the closing cable being hung on the closing inversion member;
• and
• a first end portion of an opening cable, a second end portion of the opening cable being connected to the drive device, the opening cable being hung on the opening inversion member, the supporting member being configured to move along an extending direction of the rail member by a driving force given by the drive device, the door opening and closing apparatus moving a door to open and close with movement of the supporting member by making the supporting member support the door, wherein
• the rail member of the rail module fastened to an outside surface of the vehicle body,
• a part of the drive device is arranged inside the vehicle body through an opening provided on the vehicle body,
• the door opening and closing apparatus includes;
• a sealing member;
• and
• a fastening member,
• the drive device includes a housing,
• a portion of the housing is configured to form a part of the outside surface of the vehicle body to close the opening via the sealing member, and
• the portion of the housing is pressed onto the vehicle body by the rail member and fastened to the vehicle body with the fastening member.