DOOR OPENING/CLOSING APPARATUS

• US 20120042572A1
• Filed: 07/14/2011
• Published: 02/23/2012
• Est. Priority Date: 08/17/2010
• Status: Active Grant

• Current Assignee: Mitsui Kinzoku Act Corporation (Mitsui Mining & Smelting Co., Ltd.)
• Original Assignee: Mitsui Kinzoku Act Corporation (Mitsui Mining & Smelting Co., Ltd.)
• Inventors: YUGE, Masaaki
• Granted Patent: US 8,944,487 B2
• Time in Patent Office: Days
• US Class Current: 49/340
• CPC Class Codes: E05F 15/63 operated by swinging arms
• CPC Class Codes: E05Y 2201/22 Locks
• CPC Class Codes: E05Y 2201/422 for opening
• CPC Class Codes: E05Y 2201/484 Torsion springs
• CPC Class Codes: E05Y 2201/72 Planetary gearing
• CPC Class Codes: E05Y 2400/3013 during manual wing operation
• CPC Class Codes: E05Y 2400/326 of the angular type
• CPC Class Codes: E05Y 2900/546 Tailboards, tailgates or sideboards opening upwards

Abstract

A door opening/closing apparatus automatically opens and closes a door, and the door is supported by a vehicle body such that the door can open and close in a vertical direction. A plurality of link members connect the door and the vehicle body, and at least one of the link members is driven by the drive motor. At least one of the link members is provided with a drive motor, and a connection shaft connects the link member having the drive motor and another link member that is adjacent to the former link member. The connection shaft is rotated by the drive motor.

Claims

1. A door opening/closing apparatus in which at least one of a plurality of link members that connect a vehicle body and a door supported by the vehicle body such that the door can open and close in a vertical direction is driven by an electric actuator, and the door automatically opens and closes, wherein

the electric actuator is provided on at least one of the link members, and the electric actuator rotates a connection shaft that connects a link member having the electric actuator and another link member that is adjacent to the link member having the electric actuator.

2. The door opening/closing apparatus according to claim 1, further comprising:

a speed reducing mechanism that is provided on the link member having the electric actuator and that reduces a rotation speed of the electric actuator to transmit a driving force to a connection shaft of the link member; and

a clutch mechanism that switches between transmission and non-transmission of a driving force of the electric actuator to the speed reducing mechanism.

3. The door opening/closing apparatus according to claim 2, wherein the speed reducing mechanism includes a spring, and when a driving force of the electric actuator is not transmitted, the spring applies a biasing force that biases the door in an opening direction to the speed reducing mechanism, and the spring holds the door at a stop position.

4. The door opening/closing apparatus according to claim 1, wherein a length of a link member that is placed on a side of the vehicle body is longer than that of other link members.