Door control device

Patent metadata

Field	Value
Publication number	US-11162294-B2
Application number	US-201916364662-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Oct 16, 2017
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

A door control device includes: an electric motor control unit configured to drive, in response to a closing command for closing a door that is driven to be opened and closed by an electric motor, the electric motor; a door closed state detection unit configured to detect a closed state of the door; and a lock command output unit configured to output a lock command to lock a locking device of the door, upon the closed state being detected when a predetermined waiting time has passed after the electric motor was driven by the electric motor control unit in response to the closing command and the closed state was detected by the door closed state detection unit.

First claim

What is claimed is:

1. A door control device comprising:
a memory; and
a processor that is coupled to the memory and that is configured to:
drive an electric motor for opening and closing a door;
detect a closed state of the door; and
output a lock command to lock a locking device of the door, upon the closed state being detected at a point of time at which a predetermined waiting time has passed after the electric motor was driven in response to a closing command and the closed state was detected regardless of whether the closed state is continuously detected during the predetermined waiting time,
wherein, when the closed state has been continuously maintained over the predetermined waiting time, the processor is configured to output the lock command to lock the locking device upon the closed state being detected at the point of time at which the predetermined waiting time has passed, and
wherein, when the closed state of the door is momentarily changed to an opened state during the predetermined waiting time, the processor is configured to output the lock command to lock the locking device upon the closed state being detected at the point of time at which the predetermined waiting time has passed after the closed state was detected.

2. The door control device according to claim 1 , wherein the processor outputs the lock command to lock the locking device of the door, upon the closed state being continuously detected over the predetermined waiting time after the closed state was detected.

3. The door control device according to claim 1 ,
wherein, upon the closing command being output, the processor drives the electric motor by a speed command before the closed state is detected, and
wherein, upon the closed state being detected, the processor drives the electric motor by a thrust command to keep the door closed, the thrust command indicating a predetermined thrust force which is smaller than thrust force while the processor drives by the electric motor by the speed command.

4. The door control device according to claim 3 , wherein while the processor drives the electric motor by the speed command upon the closing command being output, thrust is limited so as not to exceed a predetermined maximum value, and
wherein while the processor drives the electric motor by the thrust command, a speed is limited so as not to exceed a predetermined maximum value.

5. The door control device according to claim 1 , wherein the predetermined waiting time is a time that is in consideration of a time from when the closed state is detected to when thrust of the door driven by the electric motor becomes less than or equal to a predetermined thrust and/or a time required for an inertial force of the door to become less than or equal to a predetermined inertial force.

6. The door control device according to claim 1
wherein the processor is further configured to drive the electric motor such that a speed of the door is decreased from a first speed to a second speed upon the door being closed to a certain extent and the speed of the door is decreased from the second speed to a third speed upon the closed state being detected while thrust is maintained at a first thrust and decreased to a second thrust upon the closed state being detected.

Assignees

• Fuji Electric Co Ltd

Inventors

• Fujita Kenji
• Kitabata Atsushi

Classifications

• E05Y2201/22

  Locks · CPC title

• E05Y2400/36

  Speed control, detection or monitoring · CPC title

• B61D19/02 Primary

  for carriages (B61D19/003 takes precedence) · CPC title

• E05F15/659

  Control circuits therefor · CPC title

• E05B85/00

  Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00 · CPC title