Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support structure or arrangement
Reexamination Certificate
1999-07-13
2001-04-03
Olszewski, Robert P. (Department: 3652)
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support structure or arrangement
Reexamination Certificate
active
06209686
ABSTRACT:
SUMMARY OF THE INVENTION
1. Field of the Invention
The present invention relates to the car structure for an elevator car, which includes wall, floor, and ceiling elements forming an enclosure, and a supporting structure which supports the enclosure. The enclosure and the supporting structure, together with functional subassemblies, form an elevator car ready for operation.
2. Discussion of the Prior Art
Constructing the parts of an elevator car forming an enclosure from wall, floor, and ceiling parts capable of being assembled together, and placing such an enclosure in a sling which surrounds this enclosure, is known. Guide shoes or roller guides, together with a safety gear, are then fastened to this sling.
A solution of this type is known from U.S. Pat. No. 4,700,809. Laterally connected wall elements, a floor frame, and a ceiling element are held together and supported by a sling. To strengthen and stiffen the car body, which is made from bent metal sheet, the sling must be relatively heavily and robustly constructed.
Constructions are also known in which the supporting parts are formed from individual wall elements, which extend upwards and downwards and are fitted with guiding elements.
A solution of this type is known from French reference FR 2 740 763. Above and below the car body, extended wall elements are connected together by means of crosspieces, which form an upper yoke and a lower yoke, the extended wall elements serve to support the guide shoes and a safety gear. With this type of car construction there are no further elements to stiffen the car. According to experience, it is necessary to take extensive measures to damp vibrations on cars of this type.
SUMMARY OF THE INVENTION
The object of the present invention is therefore to create a car structure for an elevator car which has compact dimensions and great rigidity, as well as being simple and inexpensive to install.
The car structure according to the present invention includes frame elements (also referred to herein as frame stiffeners or closed rectangular frame stiffeners) to accommodate wall, floor, and ceiling elements, and which are connected by direct mechanical means to the supporting construction. The frame elements and the ceiling element are made in such a manner as to be able to accommodate functional subassemblies. As a result, fewer auxiliary parts such as mounting plates and brackets are needed for installation, and fitting out the car structure with all the internal and external fixtures and fittings to make it into a ready-to-use elevator car requires less outlay in terms of time and cost.
The frame subassemblies, which take the form of prefabricated frame elements, are supported by a supporting structure which also carries the car floor. The supporting structure mentioned forms an integral part of the car structure.
The supporting structure has side parts which have special constructions to accommodate and support the frame elements, and which also accommodate the guide shoes and the safety gear. This advantageous form of the supporting structure facilitates accommodation and fastening of the frame elements and thereby also the installation of the car structure.
The frame elements and the supporting structure, together with two crosspieces on the upper side, form a framework which stiffens and strengthens the car body.
As a result of the rigidity achieved in this manner, the car structure according to the invention is self-supporting. This makes it possible in one of the preferred embodiments for a fastening point for a suspension rope to be positioned on a crosspiece of the supporting structure at its back end, as a result of which the elevator car can travel to at least the same height as an upper return pulley.
As a result of the rigidity of the frame elements, in a further preferred embodiment as a cantilever car, they can carry upper guide shoes in a simple manner by means of extensions.
Wall elements can be fastened directly to and/or between the frame elements without auxiliary parts, and in some cases also to the floor element and to crosspieces.
The car floor construction consists of a lower floor plate on which is laid a floor element with holes in it. The holes in the floor element serve to save weight and give rigidity, the latter increasing the lifting capacity at the same time. A floor covering can be laid directly on the perforated plate.
As a result of the manner of construction of the upper parts of the frame, and of the crosspieces, a ceiling plate which closes off the car body at the top can be fastened directly to them. The cover plate also has all necessary holes drilled in it to receive ceiling and car-roof instruments.
The frame elements have a large number of mounting holes, which make it possible to join the elements to other components, and to attach further instruments and functional subassemblies, such as door drive, door panel, door guide, door sill, toe guard, display, call buttons, lighting, ceiling elements, inspection control station, and other similar items, at the job site without the need for additional processing and auxiliary parts.
The elevator car according to the invention can take the form of a cantilever car with a side entrance.
REFERENCES:
patent: 600759 (1898-03-01), Williams et al.
patent: 2246732 (1941-06-01), Hymans
patent: 3707205 (1972-12-01), Gibson
patent: 4361208 (1982-11-01), Jackson et al.
patent: 4699251 (1987-10-01), Orndorff et al.
patent: 4700809 (1987-10-01), Lazar
patent: 5018602 (1991-05-01), Salmon et al.
patent: 5564529 (1996-10-01), Ericson et al.
patent: 5581057 (1996-12-01), Ferrario et al.
patent: 5975249 (1999-11-01), Tomaseti
patent: 94 05 750 (1994-07-01), None
patent: 566 424 (1993-10-01), None
patent: 2 673 887 (1992-09-01), None
patent: 2 740 763 (1997-05-01), None
patent: 496286 (1977-04-01), None
patent: 2 139 183 (1984-11-01), None
patent: 52-47246 (1977-04-01), None
patent: 52-55145 (1977-05-01), None
patent: WO 96/16893 (1996-06-01), None
Boigues Michel
Tomasetti Fabrice
Cohen & Pontani, Lieberman & Pavane
Inventio AG
Olszewski Robert P.
Tran Thuy V.
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