JACK BASE

• Main Authors: KAMAZAKI NOBUYOSHI, WATANABE ISAO
• Format: Patent
• Language: English
• Published: 08.09.1998
• Edition: 6
• Subjects: BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; 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; PERFORMING OPERATIONS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a base jack wherein extraction is prevented from a hollow leg part for supporting, and in the case of setting up the leg part, no labor is required, and also storage can be made with the leg part at all times. SOLUTION: A jack 50 has a screw shaft 19 inserted to a lower end part of a hollow-shaped strut 18 and a lift part 54 connected to be screwed to the screw shaft 19 to have a handle 20, by the lift part 54, the strut 18 is supported. In a lower end part of the strut 18, a flange member 53 mounted in the lift part 54 is fixed. A hook member 51 is locked to an upper end part of the flange member 53, to have grooves 55d, 55e so as to be engaged in the vertical direction relating to the handle 20 and in its one rotational direction. A dislocation lock member 52 has grooves 52d, 52e so as to be engaged in the other rotational direction relating to the handle 20. In this way, the handle 20, even when it is rotated in the other direction, is prevented from being dislocated from the grooves 55d, 55e.