Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1986-05-23
1989-04-18
Rolla, Joseph J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
182141, 212206, B66B 906
Patent
active
048218456
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a traversing elevator for ferrying pedestrians easily and safely across streets.
BACKGROUND OF THE INVENTION
Crossing town streets with heavy traffic can be difficult and dangerous for pedestrians. High traffic flow, vehicles passing at high speed after running red lights, and pedestrians crossing the street without waiting for the green light are just a few of the hazards involved. Crossing railroads, waterways, work sites or other obstacles also can be dangerous.
Arc elevators that allow pedestrians to cross obstacles are known. An arcuate supporting structure straddles the obstacle and the cabin is suspended like a pendulum from the supporting structure. This form of suspension produces uncomfortable pendulum-like movements of the elevator cabin, due to wind, acceleration, and passenger movement.
Furthermore, the swinging cabin may be struck by vehicles whose height exceeds an authorized maximum, and when the cabin is suspended below the supporting structure the height of the supporting structure is increased.
DISCLOSURE OF THE INVENTION
The object of the present invention is to provide a traversing elevator for ferrying pedestrians over town streets, railroads, water ways, work sites or other obstacles, without the aforementioned disadvantages.
According to the invention, a traversing elevator, of the type shuttling back and forth over a supporting structure in the form of an arc astride said track or obstacle to be crossed, comprises at least one cabin and at least one station accessible to the pedestrians. The movement of the cabin is provided by a cable traction device with electric motor propulsion, and the cabin is guided vertically and horizontally by tracks.
According to one aspect of the invention, four roller trolleys are situated substantially at the ends of the angles of intersection of the cabin in a substantially median horizontal plane thereof, these trolleys being pivotably fixed to the cabin with their pivoting axes merged in pairs.
According to another aspect of the invention, two lower roller assemblies are situated under the cabin and disposed substantially in the two vertical planes of the pivoting axes of said trolleys, these roller assemblies being secured to the cabin by fixing triangles.
According to another aspect of the invention, an element for guiding the roller trolleys when traveling is integral with the supporting structure and formed on one side of the structure by an outer rail receiving the downstream roller trolleys and an inner rail integral with a check rail, receiving the upstream roller trolleys, these rails comprising successively a vertical rising part extending from said station and a part with transmission curvature, the outer rail being connected at its upper end to the check rail and the inner rail being extended as far as the second station.
According to another aspect of the invention, at least one take-up cam is disposed at the bottom of the beam of the supporting structure and projecting over a small length outwardly of the arc of the beam, said cam being adapted for receiving said take up rollers when running, so as to support the cabin when the downstream roller trolleys leave the upper end of the outer rail.
According to another aspect of the invention, the downstream roller trolley runs on the outer rail. The traction cables return the lower upstream rollers to their running rail, so that the axis of the lower rollers cannot deviate from the line of curvature of this rail. The triangle defined by said three points defines the movement of the cabin which is determined by two points with fixed paths (those of the axes of the upstream roller trolleys and of the axes of the lower rollers). This triangle moves in parallel relation over the arc portions of the rails and follows the transition curvature line of the arcs.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematical elevational view of a traversing elevator in accordance with the invention;
FIG. 2 is an elevational view
REFERENCES:
patent: 1473813 (1923-11-01), Crispen
patent: 4235305 (1980-11-01), Nygren
patent: 4257491 (1981-03-01), Presnall, Jr. et al.
Noland Kenneth
Otis Elevator Company
Rolla Joseph J.
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