Abstract:
In a method for locating a wall form assembly at an intended position on a floor of a concrete structure, a number of retaining grooves are initially formed in the floor at a boundary of the intended position of the wall form assembly. Thereafter, a number of upright positioning implements are mounted on the floor in the retaining grooves, respectively, before the wall form assembly is hoisted onto the floor such that an outer side of the wall form assembly abuts against the positioning implements to limit deviation of the wall form assembly from the intended position. A positioning implement and a guiding implement for use in the aforesaid locating method are also disclosed.
Abstract:
An apparatus is used for adjusting the distance between two opposed form panels and includes a tie rod, first and second nut members, a seat member, a C-shaped clamp member and a bolt member. The tie rod passes through the first and second form panels, and has first and second threaded end portions which engage respectively the first and second nut members. The seat member has opposed first and second sides, and a through hole extending from the first side to the second side. The second nut member has opposite first and second ends. The second threaded end portion of the tie rod is positioned relative to the seat member when the second end of the second nut member abuts against the second side of the seat member. The C-shaped clamp member has two arm portions which engage the retaining cavities of the seat member. The bolt member engages threadedly a threaded hole of the C-shaped clamp member and is rotatable so as to abut against the second end of the second nut member, thereby positioning the second nut member on the seat member when the second nut member abuts against the seat member.
Abstract:
A modular wall form assembly includes two upright wall form panels, a bridging plate interposed removably between the wall form panels, and a plurality of coupling devices for connecting securely the wall form panels and the bridging plate. Each of the coupling devices includes at least three horizontally aligned coupling seats mounted respectively on the rear sides of the wall form panels and the bridging plate, and a T-shaped coupling lever. Each of the coupling seats is formed with a rectangular hole and a notch that is located on a longer side of the rectangular hole and that extends to the rectangular hole. The notch has a width shorter than the length of the longer side of the rectangular hole. The coupling lever has a handle that is transversely aligned with respect to a coupling portion. The coupling portion has a cross section that corresponds in size with the rectangular holes of the coupling seats. The wall form panels and the bridging plate are interconnected by inserting the coupling portion into the rectangular holes of the coupling seats.
Abstract:
A method for constructing an upper concrete building unit on top of a pre-formed lower concrete building unit includes: (a) mounting vertical positioning pegs on the lower building unit; (b) disposing a horizontal floor form panel on top of the lower building unit, and providing holes in the floor form panel for passage of the positioning pegs to project upward through the floor form panel; (c) pouring concrete onto the floor form panel to form a concrete floor structure of the upper building unit with the positioning pegs projecting outwardly and upwardly therefrom; (d) mounting an upright wall form assembly on portions of the positioning pegs which project from the concrete floor structure of the upper building unit; and (e) pouring concrete into the wall form assembly to form a concrete wall structure of the upper building unit.
Abstract:
An anchoring device includes a hollow cylinder, a biasing unit, a shaft, a cam mechanism and a driven drum. The hollow cylinder has top and bottom ends, a cylindrical wall interconnecting the top and bottom ends, and a plurality of hook arms pivoted to the cylindrical wall. Each of the hook arms has a lower hook end which is extendible outward at the bottom end of the hollow cylinder to an operative position. The biasing unit retracts inward the lower hook ends. The shaft extends coaxially through the top end of the hollow cylinder and is movable axially relative to the hollow cylinder between a topmost position and a bottommost position. The cam mechanism is connected to the shaft. The driven drum is journalled on the shaft and has a lower end adjacent to the hook arms, and a plurality of circumferentially spaced and radially projecting push members formed on the lower end of the driven drum to push the hook arms outward against the biasing unit. The driven drum is rotatable with step-like movement by the cam mechanism upon axial movement of the shaft so as to index the push members relative to the hook arms.
Abstract:
A rotatable hoisting device includes a hanging unit with a hook, and a rotary shaft which is connected to the hanging unit. The rotary shaft is driven by a power drive unit for rotating and adjusting the hanging unit, thereby rotating a form hung on the hook to a desired angular position before it is positioned.
Abstract:
A pushing apparatus for pushing a wall form assembly that is provided with roller assemblies includes an upright tubular seat that confines an axial hole therethrough. A rotary shaft is disposed rotatably in the axial hole and has a lower end that extends out of the tubular seat and that has a base plate mounted securely thereon. A foot unit includes a pivot plate disposed below and mounted pivotally to the base plate, and an inclined support which inclines downwardly from the pivot plate and which has a lower end portion that contacts the floor. The foot unit further includes a spring member interposed between the base plate and the inclined support. The operating member includes a threaded shank which extends threadedly into the axial hole via the internally threaded top section and which is coupled rotatably to an upper end of the shaft. When the threaded shank is rotated so as to extend a longer length of the shaft out of the tubular seat, the foot unit is forced toward the floor against action of the spring member and pivots so as to generate a pushing force that is applied by the tubular seat on the wall form assembly to facilitate adjustment of the position of the wall form assembly on the floor.
Abstract:
An apparatus for moving a wall form assembly on a floor includes an upright tubular seat which has upper and lower portions and which confines an axial hole through the upper and lower portions. The upper portion has an internally threaded top section. The lower portion is provided with a radial support projection. A horizontal beam has a front end and a rear end mounted on the upper portion of the tubular seat. A hook member is mounted on the front end of the horizontal beam. A rotary shaft is disposed rotatably in the axial hole and has an upper end and a lower end that extends out of the tubular seat and that has a roller mounted thereon. An operating member includes a threaded shank which has a lower section that extends threadedly into the axial hole via the internally threaded top section of the tubular seat and that is coupled to the upper end of the shaft. The tubular seat is movable upward or downward relative to the shaft upon rotation of the threaded shank so as to permit raising or lowering of the wall form assembly relative to the floor to facilitate adjustment of a position of the wall form assembly on the floor.