Opening-closing control device and opening-closing control method

1. An opening-closing control device driving an opening-closing member with use of a drive device and controlling the opening-closing member to open or close an opening portion, the opening-closing control device comprising:

a load detector detecting an increase of load on the opening-closing member when the opening-closing member is located near a fully closed position in which the opening-closing member fully closes the opening portion, the increase of load being generated due to pressing of the opening-closing member against an elastic member that is disposed on an end of the opening portion and is opposed to the opening-closing member in a moving direction of the opening-closing member, and

a drive-force stopping device stopping a drive force supplied to the drive device at a time just before the opening-closing member reaches a mechanically limit position in a closing direction of the opening-closing member when the increase of load detected by the load detector is larger than a predetermined threshold.

2. The opening-closing control device according to claim 1 , wherein the drive-force stopping device stops the supply of drive force in a state where a position of the opening-closing member relative to the opening portion is changed due to the pressing of the opening-closing member against the elastic member.

3. The opening-closing control device according to claim 1 , wherein

the opening-closing member has a flat shape, and

the drive-force stopping device stops the supply of drive force just before an end portion of the opening-closing member opposite from the elastic member moves in a direction perpendicular to a flat surface of the opening-closing member.

4. The opening-closing control device according to claim 1 , wherein the drive-force stopping device stops the supply of drive force before an end portion of the opening-closing member opposite from the elastic member moves in a direction intersecting with the moving direction of the opening-closing member.

5. A method for driving an opening-closing member with use of a drive device and controlling the opening-closing member to open or close an opening portion, the method comprising:

detecting that a load on the opening-closing member is increased to a predetermined threshold when the opening-closing member is located near a fully closed position in which the opening-closing member fully closes the opening portion, the increase of load being generated due to pressing of the opening-closing member against an elastic member that is disposed on an end of the opening portion and is opposed to the opening-closing member in a moving direction of the opening-closing member; and

stopping a drive force supplied to the drive device after detecting, at a timing just before the opening-closing member reaches a mechanically limit position in a closing direction of the opening-closing member.

6. The opening-closing control method according to claim 5 , wherein the step of stopping supply of drive force to the drive device is performed after a position of the opening-closing member relative to the opening portion is changed due to the pressing of the opening-closing member against the elastic member.

7. The opening-closing control method according to claim 5 , wherein the step of stopping supply of drive force to the drive device is performed just before an end portion of the opening-closing member opposite from the elastic member moves in a direction perpendicular to a flat surface of the opening-closing member.

8. A method for driving an opening-closing member with use of a drive device and controlling the opening-closing member to open or close an opening portion, the method comprising:

determining whether an end portion of the opening-closing member reaches a predetermined position at which a fully-closing control is started;

detecting a load on the opening-closing member due to contact between the opening-closing member and an elastic member disposed on an end of the opening portion, after the opening-closing member reaches the predetermined position;

determining whether the load reaches a predetermined threshold lower than a load value at which the opening-closing member reaches a mechanically limit position; and

stopping electric power supplied to the drive device after the load reaches the predetermined threshold.