Land vehicles – Wheeled – Stable vehicles – handle-propelled
Patent
1996-09-03
1999-11-02
Swann, J. J.
Land vehicles
Wheeled
Stable vehicles, handle-propelled
2111331, 248903, 280 793, B62B 302
Patent
active
059755440
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND
1. Field of the Invention
This invention relates to a transport trolley suitable for accommodating and transporting containers and utensils for the institutional cleaning and disinfection of floors and other surfaces, as a useful-material collector and for other tasks in the institutional cleaning of buildings, comprising a chassis also known as the baseplate and substantially vertical uprights.
2. Discussion of Related Art
Known transport trolleys are used as disinfection or waste-disposal trolleys or as useful-material collectors. They are also used in the institutional cleaning of buildings as so-called cleaning or equipment trolleys for carrying buckets for the cleaning liquid and the dirty water, floor mops, rubbish sacks and other utensils. The term "transport trolley" is used in the present specification for all these and similar trolleys.
Known transport trolleys offer more or less large useful surfaces for carrying cleaning utensils. They are particularly suitable for accommodating buckets, for example for cleaning liquids and dirty water, and relatively small cleaning utensils. However, the surface area of the base plate is generally not sufficient. Accordingly, uprights are mounted on the base plate, inter alia to carry transport trays, as known for example from DE 39 37 189 A1.
However, problems are involved in fixing the uprights to the chassis. In the prior art, the uprights are welded to the base plate or are joined thereto by a screw which is guided through the chassis and screwed into a nut let into the end of the upright. In use, however, such powerful lever forces act on the upright/chassis joint that the end of the upright often breaks.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide inexpensive means to fix the upright(s) of a transport trolley to its base plate in such a way that the danger of breakage is greatly reduced.
The present invention meets the above objects and others by providing a base plate comprising at least one downwardly projecting shaft which is suitable for receiving the uprights and which is additionally fixed to the bottom of the base plate by stays. The upright fitted into the shaft is fixed by stays to a relatively large area of the base plate. Accordingly, there is no danger of the shaft being dislodged with the upright fitted therein.
A particularly stable connection between the upright and the base plate is established if the stays surround the shaft on all sides.
The stays may differ in their nature and configuration. In one preferred embodiment, extremely stable stays involving relatively little consumption of material assume the form of flat lamellae.
Particular and possibly elaborate precautions to secure the uprights in the shafts are unnecessary if the opening of the shaft is accurately adapted in its dimensions to the corresponding upright.
In addition, a tightening screw for pressing the shaft onto the upright is advantageous as an additional safeguard, the tightening screw passing in particular both through the shaft and through the upright. A friction-locking and interlocking connection between the upright and the base plate is established in this way.
The invention does not involve any expensive modifications to the process used to make the transport trolley. In one particularly preferred embodiment, the base plate is made in one piece with shafts and stays from plastic material. Accordingly, the chassis can be produced with the shafts in a single operation. The use of plastic has the further advantage that no corrosion problems arise in the use of the transport trolley.
The mechanical stability of the transport trolley is further increased if the uprights are joined, more particularly screw, to one another and to the remaining superstructure of the base plate.
The invention is not limited to uprights of a particular type and size where the base plate comprises shafts differing in size of which only some have to be used. Several shafts of various sizes arranged closely adjacent one another on th
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Fernschild Hans-Leo
Kresse Franz
Osberghaus Rainer
Schunter Roland
Henkel-Ecolab GmbH & Co. OHG
Jaeschke Wayne C.
Mar Michael
Swann J. J.
Szoke Ernest G.
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