Title:
DOOR CLOSER IN WHICH TWO LINK DEVICES SIMULTANEOUSLY OPERATE AND STOP
Document Type and Number:
Japanese Patent JP2022065860
Kind Code:
A
Abstract:
To provide a door closer that stops a door that suddenly accelerates in an opening direction by a blast of wind when the door is opened.SOLUTION: A door closer includes: a link device that operates only when a door is closed and does not operate when the door is opened; and a link device that operates only when the door is opened and does not operate when the door is closed. The two link devices are interchanged when the door is fully closed and simultaneously operate and stop. A decelerator in which a steel ball that falls with dead weight is used as replacement of sand in a sandglass includes a moving body that follows a discharge speed of the steel ball. The decelerator resists a large force and requires almost no power to operate.SELECTED DRAWING: Figure 23
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Inventors:
OKAMOTO KOICHI
Application Number:
JP2020174614A
Publication Date:
April 28, 2022
Filing Date:
October 16, 2020
Export Citation:
Assignee:
OKAMOTO KOICHI
International Classes:
E05F1/14; E05F3/16; E05F5/02