JACK-UP DEVICE AND CONSTRUCTION MACHINE

• Main Authors: SASAOKA YOSHIO, WATANABE TAKUYA, TAKAMATSU NOBUHIRO, KOIZUMI YUKIO, KAKIUCHI KAZUYA
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2019
• Subjects: CRANES; HAULING; HOISTING; HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

To provide a jack-up device small in outer diameter of the device and large in the amount of jack-up.SOLUTION: In a jack-up device according to the present invention, which is a jack-up device having a multistage hydraulic cylinder mechanism, a hydraulic cylinder mechanism on the outside is a double-acting cylinder mechanism and a hydraulic cylinder mechanism in the center is a single-acting cylinder mechanism. The double-acting cylinder mechanism may has: a forward channel for supplying hydraulic oil to a space opposite the cylinder in an outer cylinder; and a backward channel for supplying hydraulic oil to a space on the inner cylinder side in the outer cylinder. The single-acting cylinder mechanism may has: an interlocking channel extending through an outer piston and allowing a space opposite the inner cylinder in the outer cylinder to communicate with a space opposite the rod in the inner cylinder; and an oil sealing channel extending through an inner piston and allowing a space on the outer piston side in the inner cylinder to communicate with a space on the rod side.SELECTED DRAWING: Figure 4 【課題】本発明は、装置の外径が小さくジャッキアップ量が大きいジャッキアップ装置を提供することを課題とする。【解決手段】本発明に係るジャッキアップ装置は、多段油圧シリンダ機構を有するジャッキアップ装置であって、外側の油圧シリンダ機構が複動シリンダ機構であり、最中心の油圧シリンダ機構が単動シリンダ機構であることを特徴とする。複動シリンダ機構が、外シリンダ内の上記内シリンダと反対側の空間に作動油を供給する往動流路と、外シリンダ内の上記内シリンダ側の空間に作動油を供給する複動流路とを有し、単動シリンダ機構が、外ピストンを貫通し、外シリンダ内の上記内シリンダと反対側の空間を上記内シリンダ内の上記ロッドと反対側の空間に連通させる連動流路と、内ピストンを貫通し、内シリンダ内の外ピストン側の空間をロッド側の空間に連通させる油封流路とを有してもよい。【選択図】図４