Title:
DOOR CLOSING AUXILIARY DEVICE
Document Type and Number:
Japanese Patent JP2022070519
Kind Code:
A
Abstract:
To allow an adjustment work for an energizing force to a pulling arm to be easily performed in a door closing auxiliary device that assists door closing operation by engaging a pulling arm of a device body fitted to one of a door frame and a revolving door with a trigger fitted to the other.SOLUTION: An arm pressing spring 17 for generating an energizing force to a pulling arm 3 along a longer direction of a laterally long body case 2 in the body case. Rotating a spring adjustment screw 21 extending in width direction of the body case 2 causes a cam member 20 that stores an adjustment nut 22 screwed with the spring adjustment screw 21 to move in the width direction of the body case 2. When a second spring case 19 having an inclined cam surface that slidably contacts with an inclined cam surface of the cam member 20 moves in longer direction of the body case 2, compression amount of the arm pressing spring 17 changes so as to allow the energizing force thereof to be adjusted. This configuration allows rotation operation of the spring adjustment spring 21 to be easily performed from outside in width direction of the body case 2.SELECTED DRAWING: Figure 8
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Inventors:
SASAKI YOSHITO
Application Number:
JP2020179623A
Publication Date:
May 13, 2022
Filing Date:
October 27, 2020
Export Citation:
Assignee:
NAKAO SEISAKUSHO KK
International Classes:
E05F3/00; E05F1/10; E05F5/02
Attorney, Agent or Firm:
Naoya Kamada
Bunji Kamata
Yaichiro Nakatani
Bunji Kamata
Yaichiro Nakatani