Material or article handling – Apparatus for moving material to a position in the erection... – Flat wall or ceiling member manipulating means
Patent
1995-07-05
1998-01-06
Merritt, Karen B.
Material or article handling
Apparatus for moving material to a position in the erection...
Flat wall or ceiling member manipulating means
414 10, 414607, E04G 2114
Patent
active
057047553
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to hoists but more particularly relates to mobile hoists for lifting wall and/or ceiling panels used in building construction.
Most buildings are constructed utilizing available forms of cladding for internal walls, which cladding generally comprises flat sheets or panels of various dimensional sizes and weights. Ceilings and internal walls are generally lined with these panels. Where large panels are used, the weight of those sheets makes fixation thereof at least a two and preferably a three man job. The panels are heavy, cumbersome and hard to handle especially where panels are to be placed on the ceiling.
Wallboard panels made from plaster and cardboard are not stiff enough to resist bending and must be carefully handled so that they are kept substantially flat during installation to prevent snapping. For long panels this necessitates adequate support of the panels until they are fixed in position.
In recognition of this problem, special hoists have been constructed for handling panels such as wallboards. One such hoist is the subject of U.S. Pat. No. 3,828,942.
That invention comprises a lifting device for lifting ceiling panels into place flush against the ceiling beams for installation. The device has a supporting structure for supporting the panel and telescopic sleeves for raising and lowering the panels. The device also has a cable and pulley connecting structure for telescoping the sleeves with a drum or spool for winding the cable and a brake mechanism for the drum. The supporting structure may also be pivoted at an angle and carry thereon panels for installation against the upright wall framework.
More particularly, that invention comprises a lifting device for lifting and aligning wallboard panels to and with the ceiling and vertical walls for installation of the panels to the interior frame of a building. The device comprises a telescopic shaft or sleeve structure, an upright frame, a drum mounted to the upright frame having a wheel for rotating the drum, a plurality of pulleys mounted to the telescopic structure and frame, a cable extending from the drum and about the pulleys and interconnecting the telescoping shaft structure whereby rotation of the drum in one direction by turning the wheel will telescope the telescopic shaft structure. Spaced apart support beams are mounted to the upper end of the telescopic shaft structure each of which have hooks at one end whereby a panel may be placed upon the support beams retained by the hooks and raised vertically to the ceiling by the telescopic structure. The support structure may be pivoted to a selected angle whereby the panel rests in the hooks. The device can then be moved toward a vertical wall framework to facilitate placement of the panel in position against the vertical wall for installation of the panel.
One disadvantage of this device is that the user is still required to lift the wall and ceiling panels onto the device itself. Once the panel is lifted by hand onto the device, the device is operated in the usual way by hoisting the ceiling or wall panel into position. It is quite difficult for one individual to lift heavy panels onto the hoist. Using the existing hoist it is still generally a two man job.
SUMMARY OF THE INVENTION
The present invention seeks to overcome this problem by providing a panel lifting and transporting assembly which enables a panel to be lifted from a position off the assembly to a support structure on the assembly.
More particularly the present invention provides an assembly including a panel lifting apparatus for attachment to a panel hoist or panel support trolley thereby providing means to enable lifting of a panel to be fixed to the surface of a building onto the hoist.
The attachment comprises:
means for enabling attachment of the apparatus to a supporting hoist or trolley, clamping means for gripping a panel to be lifted;
control means directly or indirectly linked to the clamp to enable movement/lifting of the panel onto the hoist. Preferabl
REFERENCES:
patent: 2815132 (1957-12-01), Stone
patent: 2828870 (1958-04-01), Corley
patent: 2939590 (1960-06-01), Henry
patent: 3019914 (1962-02-01), Taylor
patent: 3305219 (1967-02-01), Rhodes
patent: 3643935 (1972-02-01), Bell
patent: 4749324 (1988-06-01), Rulison
patent: 4810151 (1989-03-01), Shern
patent: 5224808 (1993-07-01), Macris
Hess Douglas
Merritt Karen B.
Plasterboard Lifting Tools Pty Ltd.
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