| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a door opening/closing device for braking a door at an arbitrary position, and allowing a door opening/closing mechanism to actuate in a direction for closing the door. <P>SOLUTION: This door opening/closing device is equipped with a clutch transmitting a power from a drive means to a door opening/closing mechanism when electricity is conducted, and shutting off the transmission of the power from the drive means to the door opening/closing mechanism when the electricity is not conducted. The clutch comprises a drive disc 32a driven by a drive means; a couple-drive disc 33a jointed with the drive disc 32a to transmit the power from the drive means to the door opening/closing mechanism when the electricity is conducted, and separated from the drive disc 32a to shut off the transmission of the power from the drive means to the door opening/closing mechanism; and a brake disc 38 jointed with the couple-drive disc 33a to brake the door opening/closing mechanism in a direction for opening the door under a condition that the drive disc 32a is separated from the couple-drive disc 33a, and allowing the door opening/closing mechanism to actuate in a direction for closing the door. <P>COPYRIGHT: (C)2004,JPO |
