Land vehicles – Step or abutment ascending type vehicle – With spider-type engaging means
Patent
1985-05-13
1987-01-27
Pekar, John A.
Land vehicles
Step or abutment ascending type vehicle
With spider-type engaging means
B62B 502
Patent
active
046390022
DESCRIPTION:
BRIEF SUMMARY
This invention relates to trolleys of the type used to transport goods, examples are supermarket trolleys and luggage trolleys as used in airports.
With the advent of multi-story shopping centres and airports escalators have been introduced with a view to facilitating the transport of persons from floor to floor. Ramps have been installed in many multi-story buildings to enable persons to move trolleys from floor to floor. So as to facilitate the movement of trolleys up the ramps the inclines have been carefully designed but even so there is a reluctance by persons to push a loaded trolley up a ramp. Because of this it has become common for persons to limit their purchases in shopping centres to floors where they can have immediate access to carparking facilities and by so doing avoid the above problem.
To counter this practice multi-story car parks have been built alongside multi-story shopping centres so persons so inclined can park adjacent the floor where they will be making their purchases and transporting them in a shopping trolley. This however leaves the older and less well designed shopping centres with the problem of how to easily transport trolleys from floor to floor. In many shopping centres person conveying escalators are installed but trolleys have not hitherto been designed for use with such escalators. This invention provides improvements in trolleys which will allow them to travel safely with the user on the escalator from floor to floor.
The present invention can be broadly said to comprise a wheeled trolley frame for use on an escalator, said frame having two ends and two pairs of ground engaging wheels respectively positioned one pair adjacent each frame end and spaced apart so that both pairs of wheels cannot sit on a single escalator step tread, an escalator tread engaging means on the frame positioned adjacent one of the wheel pairs and intermediate the wheel pairs, the tread engaging means lies above ground level and is spaced therefrom by a distance such that it will when the trolley frame is mounted on a formed escalator engage on a step tread of the escalator and maintain the wheels adjacent the tread engaging means elevated from the escalator step tread.
Several presently preferred embodiments of the invention will now be described with reference to the accompanying drawings in which:
FIG. 1 is a schematic elevation of a shopping trolley made according to one embodiment of the invention when entered onto an escalator as the steps are about to form,
FIG. 2 is a view similar to FIG. 1 after the escalator steps have formed,
FIG. 3 is a view similar to FIG. 1 of a second embodiment of the invention,
FIG. 4 is a view similar to FIG. 3 after the escalator steps have formed,
FIG. 5 is a view similar to FIG. 1 of a third embodiment of the invention,
FIG. 6 is a view similar to FIG. 5 after the escalator steps have formed, and
FIG. 7 is a perspective elevation of the trolley of FIG. 3 showing details of the construction.
In the drawings there is shown a shopping trolley by way of example but the invention is applicable to other forms of trolleys such as low level platform luggage trolleys as used in airports. For this reason the invention can be considered as being directed to a wheeled trolley frame on which goods supporting attachments, such as a basket, can be secured. As illustrated the trolley frame 1 of FIG. 1 has a front pair of wheels 2 and a rear pair of wheels 3. On the frame 1 adjacent the rear wheels 3 there are support members 4, one adjacent each rear wheel 3 and they are elevated a small distance above a common plane on which all four wheels would normally rest if the frame was not on the escalator. The escalator section shown includes five treads T1, T2, T3, T4, and T5 separated by risers R1, R2 and R3 (see FIG. 6).
The tread widths are the same and for the purposes of later explanation will be considered as being equal to X. It will be noted from FIGS. 1,3 and 5 that the pitch of the wheel pairs is such that when the wheels 2 on the tread T2 abut the riser R1 the rear w
O'Brien Anthony A.
Pekar John A.
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