Title:
LOAD RECEIVING PLATFORM LIFTING DEVICE
Document Type and Number:
Japanese Patent JP2018095212
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a load receiving platform lifting device of which an operation speed can be reduced at the end of a contraction operation of a tilt cylinder.SOLUTION: A hydraulically driven tilt cylinder 3 for adjusting an angle of a load receiving platform comprises: a cylindrical cylinder tube 31; a piston 32 which is reciprocated in the cylinder tube 31; a piston rod 33 which is connected to the piston 32; a valve part 35 which is so provided as to be movable in an axial direction of the piston rod 33 on a tip side with respect to the piston 32; and an energization part 36 which energizes the valve part 35 in a tip direction of the tilt cylinder 3. The cylinder tube 31 comprises a downstream side oil passage 311 on a tip side with respect to a movable range of the piston 32, the valve part 35 has a cross-sectional area larger than a cross-sectional area of an actual oil passage portion of the downstream side oil path 311, and covers the downstream side oil passage 311 in the state that passage of hydraulic oil is permitted with a reduced oil quantity, before the piston 32 reaches a tip of the movable range.SELECTED DRAWING: Figure 4
Inventors:
HORIKAWA KATSUHIRO
TSUJI MIKIHIRO
KATAOKA SOTA
TSUJI MIKIHIRO
KATAOKA SOTA
Application Number:
JP2016244654A
Publication Date:
June 21, 2018
Filing Date:
December 16, 2016
Export Citation:
Assignee:
KYOKUTO KAIHATSU KOGYO CO
International Classes:
B60P1/44; B65G67/24; F15B15/22
Attorney, Agent or Firm:
Noboru Fujimoto
Hiroaki Nakatani
Akira Kitada
Hiroaki Nakatani
Akira Kitada