Title:
DOOR CLOSER
Document Type and Number:
Japanese Patent JP2016183555
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a door closer capable of easily adjusting the flow rate of hydraulic oil while utilizing an advantage of a cam type that torque immediately before the total closing of a door is large.SOLUTION: A door closer includes: a main shaft 3 which rotates in accordance with opening/closing operations of a door; main springs 16, 17 for generating a closing force; and a buffer piston 10 for flushing away hydraulic oil to a flow rate control flow channel 9 so as to buffer a door closing operation. The main shaft 3 is provided with a cam 12 which elastically deforms the main springs 16, 17 in a door opening operation, and receives the closing force of the main springs 16, 17 in the door closing operation, and provided with a screw feed mechanism which causes the buffer piston 10 to move along the axial direction of the main shaft 3 in accordance with the rotation of the main shaft 3.SELECTED DRAWING: Figure 8
Inventors:
ISHIDA KOJI
Application Number:
JP2016114153A
Publication Date:
October 20, 2016
Filing Date:
June 08, 2016
Export Citation:
Assignee:
RYOBI LTD
International Classes:
E05F3/10; E05F3/18; F16F9/00
Domestic Patent References:
| JP2008196256A | 2008-08-28 | |||
| JPH0520547B2 | 1993-03-19 |
Foreign References:
| GB396889A | 1933-08-17 |
Attorney, Agent or Firm:
Tokuya Iwata