Title:
作業用昇降椅子
Document Type and Number:
Japanese Patent JP7233293
Kind Code:
B2
Abstract:
To provide a work elevation chair that can raise/lower a seat part without changing a position in front and in the rear while supporting the body from a low place to a half-sitting height, by a small mechanism.SOLUTION: The work elevation chair includes a base frame 1, an elevation mechanism part 20, and a seat part 40. The elevation mechanism 20 sets the base frame 1 as a fixed joint, with a seventh link 7 as a fixed joint regarding an angle. A fifth link 5 and a sixth link 6 serve as a lever respectively, with the length of the fifth link 5 made the same as the second link 2 of a first double lever mechanism 41. Thus, the constitution is made with a second double lever mechanism 42 making restraint motion together with an eighth link 8, and with a variable length expansion device 9 which can switch the first and the second double lever mechanisms 41, 42 to fixed linkage at an arbitrary position. The fourth link 4 and the fifth link 5 as well as the second link 2 and the eighth link 8 rotate integrally to operate the expansion device 9, so that the first and the second double lever mechanisms 41, 42 make connected motion to raise/lower the seat part 40 in a horizontally intact state without changing a position in front and in the rear.SELECTED DRAWING: Figure 1
Inventors:
Kotaro Ito
Application Number:
JP2019082974A
Publication Date:
March 06, 2023
Filing Date:
April 24, 2019
Export Citation:
Assignee:
Takano Co., Ltd.
International Classes:
A47C9/00; A47C3/36; A47C4/04
Domestic Patent References:
| JP2000014475A | ||||
| JP2008154948A | ||||
| JP2012016375A | ||||
| JP3014828U | ||||
| JP49047704U |
Foreign References:
| US20050121960 |
Attorney, Agent or Firm:
Murase Kazumi