Title:
ELEVATION URGING MECHANISM FOR ELEVATABLE STAGE
Document Type and Number:
Japanese Patent JP2578071
Kind Code:
B2
Abstract:
PURPOSE: To provide a stage having a heavy stage panel which can fall in a nearly no-load condition.
CONSTITUTION: A link piece 22 is rotatably coupled at one end to a base part 4, and is slidably engaged at the other end on a rail 14 laid on the rear side of a stage part. A link piece 21 is rotatably coupled at one end to the stage part, and is slidably engaged at the other end on a rail 44 laid on the base part 4. A coupling pin 20 is inserted in crossing parts of the link pieces 21, 22. Upper and lower spring housings 31 are swingably attached to one of the link pieces 21, 22 which is above the pin 20, and one of the link pieces 21, 22 which is below the pin 20, by means of bolts 32. A coil spring 3 through which a spring retaining rod 33 is inserted, is received in each of the spring housings 31, one end part 34 of the rod being projected from the spring housing 31. Chains 35 engaged with a sprocket wheel 25 fixed to the coupling pin 20 are coupled at opposite ends to the rod end parts 34, respectively.
Inventors:
HARUTA HIROTAKA
Application Number:
JP6460894A
Publication Date:
February 05, 1997
Filing Date:
March 07, 1994
Export Citation:
Assignee:
HARUTA HIROTAKA
International Classes:
A63J5/12; E04H3/26; E04H3/28; (IPC1-7): E04H3/28; A63J5/12; E04H3/26
Attorney, Agent or Firm:
Hidetoshi Matsushima