Door opening/closing device

Patent metadata

Field	Value
Publication number	US-10494852-B2
Application number	US-201916386509-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	Nov 2, 2017
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A door opening/closing device includes: an opening/closing bar attached to a door, which is actuated by a motor and is used for opening and closing the door; a door closing state detecting part configured to detect whether the door is in a closed state; a locking device configured to lock and unlock the door; a lock pin capable of being moved to a locked position or an unlocked position by the locking device; an engaging member attached to the opening/closing bar, which includes an engaging part configured to engage with the lock pin moved to the locked position; a first spring provided between the opening/closing bar and the engaging member; and a locking control unit configured to cause the locking device to lock the door when the closed state is detected by the door closing state detecting part.

First claim

What is claimed is:

1. A door opening/closing device comprising:
an opening/closing bar attached to a door, the opening/closing bar being configured to be actuated by an electric motor, the door being opened and closed by the opening/closing bar being moved between an opened position and a closed position;
a door closing state detecting part configured to detect whether the door is in a closed state;
a locking device configured to lock and unlock the door;
a lock pin configured to be moved to a locked position or an unlocked position by the locking device;
an engaging member attached to the opening/closing bar, the engaging member including an engaging part configured to engage with the lock pin moved to the locked position, in a state in which the closed state is detected by the door closing state detecting part;
a first spring provided between the opening/closing bar and the engaging member; and
a locking control unit configured to issue a lock instruction to the locking device to cause the locking device to lock the door, in a case in which the opening/closing bar is moved to the closed position by the electric motor and in which the closed state is detected by the door closing state detecting part.

2. The door opening/closing device according to claim 1 , wherein an elastic force of the first spring is set such that a user can pull out an obstacle caught between the door and another door or a frame.

3. The door opening/closing device according to claim 1 , wherein the first spring can contract to a given length such that a user can pull out an obstacle caught between the door and another door or a frame.

4. The door opening/closing device according to claim 1 , further comprising a second spring, wherein the second spring contracts when the lock pin is in the unlocked position, and the second spring moves the lock pin to the locked position by a restoring force of the second spring.

5. The door opening/closing device according to claim 4 , further comprising
a first locking unit including a first pin movable between a first projected position and a first retracted position, the first locking unit being configured to raise the lock pin from the locked position to the unlocked position, by the first pin being moved from the first retracted position to the first projected position; and
a second locking unit including a second pin movable between a second projected position and a second retracted position, the second locking unit being configured to hold the lock pin at the unlocked position with the second pin from a horizontal direction, by the second pin being moved from the second retracted position to the second projected position;
wherein, when an unlock instruction is issued from the locking control unit,
the second pin holds the lock pin at the unlocked position from the horizontal direction by moving from the second retracted position to the second projected position, after the first pin raises the lock pin from the locked position to the unlocked position by moving from the first retracted position to the first projected position, and
after the lock pin is held at the unlocked position by the second pin at the second projected position, the first pin of the first locking unit moves from the first projected position to the first retracted position.

Assignees

• Fuji Electric Co Ltd

Inventors

• Fujita Kenji
• Kitabata Atsushi

Classifications

• B61D19/00

  Door arrangements specially adapted for rail vehicles (locks for vehicles E05B77/00-E05B85/00; door-operating mechanisms E05F) · CPC title

• E05B65/0882

  mounted on the slide guide, e.g. the rail · CPC title

• E05Y2900/51

  for railway cars or mass transit vehicles · CPC title

• E05B83/363

  for railway vehicles (E05B77/54 takes precedence) · CPC title

• B61D19/005

  sliding (B61D19/008, B61D19/009 take precedence) · CPC title