DOOR OPENING/CLOSING SYSTEM AND CATCH THEREFOR

• US 20120180395A1
• Filed: 08/18/2010
• Published: 07/19/2012
• Est. Priority Date: 08/20/2009
• Status: Active Grant

• Current Assignee: Sugatsune Kogyo Co., Ltd.
• Original Assignee: Sugatsune Kogyo Co., Ltd.
• Inventors: Yamaguchi, Koushi
• Granted Patent: US 8,584,402 B2
• Time in Patent Office: Days
• US Class Current: 49/359
• CPC Class Codes: E05F 1/14 with double-acting springs, e.g. for closing and opening or checking and closing no material
• CPC Class Codes: E05F 5/027 with closing action
• CPC Class Codes: E05Y 2201/412 for the final closing movement
• CPC Class Codes: E05Y 2800/24 of springs and brakes
• CPC Class Codes: E05Y 2900/132 Doors
• CPC Class Codes: Y10T 292/096 Sliding

Abstract

Provided is a door opening and closing system capable of returning to a return state where a catch and a retractable arm are engaged with each other even if the retractable arm is closed completely as a result of incorrect usage such as a prank. A catch has a catch base which is mounted on either one of the door and a frame and a catch shaft which is installed in the catch base slidable in an axial direction and engaged with a retractable arm. At a tip end of the catch shaft, a small-diameter part is provided as a step part. The step part of the catch shaft and the retractable arm are engaged with each other in a state where the retractable arm is further rotated in the closing direction after a main body part of the catch shaft and the retractable arm are engaged with each other.

Claims

1. A door opening and closing system comprising:

a catch which is mounted at either one of a door and a frame and a door opening and closing device which is mounted on an opposite one of the door and the frame and has a retractable arm that is engaged with the catch, in which, when the door gets closed, the retractable arm of the door opening and closing device is engaged with the catch and the retractable arm rotates about an arm axis to give the door a force in a closing direction, wherein

the catch has a catch base which is mounted on the one of the door and the frame and a catch shaft which is installed in the catch base slidable in an axial direction and engaged with the retractable arm,

the catch shaft has a main body part which is engageable with the retractable arm and a step part which is provided at a tip end of the main body part and engageable with the retractable arm, and

the step part of the catch shaft and the retractable arm are engaged with each other in a state where the retractable arm is further rotated in the closing direction after the main body part of the catch shaft and the retractable arm are engaged with each other.

2. The door opening and closing system of claim 1, wherein step difference is provided on an entire circumference of the catch shaft.

3. The door opening and closing system of claim 1, wherein the catch base has a long hole formed therein for adjusting a mounting position of the catch base relative to the door or the frame.

6. The door opening and closing system of claim 2, wherein the catch base has a long hole formed therein for adjusting a mounting position of the catch base relative to the door or the frame.

4. A door opening and closing system comprising:

a catch which is mounted at either one of a door and a frame and a door opening and closing device which is mounted on an opposite one of the door and the frame and has a retractable arm that is engaged with the catch, in which, when the door gets closed, the retractable arm of the door opening and closing device is engaged with the catch and the retractable arm rotates about an arm axis to give the door a force in a closing direction, wherein

the catch has a catch base which is mounted on the one of the door and the frame and a catch shaft which is installed in the catch base slidable in an axial direction and engaged with the retractable arm,

the catch shaft has a main body part which is engageable with the retractable arm and a step part which is provided at a tip end of the main body part and engageable with the retractable arm, and

step difference is provided on an entire circumference of the catch shaft.

5. A catch for a door opening and closing system which gives a door a force in a closing direction when the door gets closed, wherein

the catch has a catch base which is mounted on either one of the door and a frame and a catch shaft which is installed in the catch base slidable in an axial direction and engaged with a retractable arm,

the catch shaft has a main body part which is engageable with the retractable arm and a step part which is provided at a tip end of the main body part and engageable with the retractable arm, and

step difference is provided on an entire circumference of the catch shaft.