| 摘要 |
PURPOSE: A screw jack for a construction structure is provided to improve work efficiency and to minimize waste of a support shape steel, by reducing an attaching and a cutting process of the support shape steel attached to vertical and horizontal shape steels by easily controlling an angle of the screw jack. CONSTITUTION: A screw jack for a construction structure comprises an upper jack(100), a lower combining pipe(200), a lower jack(300), and a steel rod(400). The upper jack comprises an upper combining pipe(110) and an upper support part(120) closely combined to the outside of the upper combining pipe. Plural reinforcing ribs(112) are formed to the outside of the upper combining pipe. The lower combining pipe is integrally combined with the lower part of the upper combining pipe. A rack is formed to the lowermost end of the lower combining pipe. A combining hole is formed in the side of the lower combining pipe. The lower jack comprises a chute plate, to which a pinion(312) to engage with the rack is formed, and a lower support plate(320) closely combined to the outside of the chute plate. Combining holes(315) are formed in the sides of the chute plate. The steel rod fastens the lower combining pipe and the chute plate by passing through the combining hole of lower combining pipe and the combining holes of the chute plate.
|
