Patent Application
20050016816
The invention relates generally to motorised conveyors, equipped with a fixed infrastructure.
More precisely, the invention relates to a passive conveyor between two active drive systems of a carrying device, such as a pedestrian conveyor, designed to convey, for example to pedestrians, a movement in a longitudinal direction, this conveyor being placed between the two drive systems in the longitudinal direction and comprising a chassis extending in a transversal direction perpendicular to the longitudinal direction, as well as means of rolling, supported by the chassis and defining a rolling surface connecting the two drive systems.
This type of device is for example disclosed in the European patent EP 0 803 464.
As this patent sets out, the purpose of such a conveyor is to allow for the transient movement of a given load, for example a pedestrian, between two drive systems operating at two different respective speeds, so that the positive or negative acceleration undergone by the carried load is minimal.
Such devices, which are generally installed in public places, are subject to strict operating rules and must therefore be very robust.
From this perspective, the aforementioned patent recommends the use, as means of rolling, of balls or rollers in substantially semi-spherical or semi-cylindrical recesses.
The invention, that falls within this context, is intended to provide a conveyor of simple structure, of robust construction, and moreover capable of offering, on the rolling surface, a better rolling surface than the device of the prior art.
To accomplish this, the device according to the invention, moreover in compliance with the definition by extension which the above preamble gives, is essentially characterised in that it comprises a plurality of side walls each of which is integral to the chassis and extends on a plane perpendicular to the transversal direction as far as an upper edge set back from the rolling surface, and a plurality of axes each of which extends parallelly to the transversal direction and crosses at least two adjacent side walls, and in that the means of rolling comprise a plurality of rollers laid out in a plurality of successive rows, adjacent one to another along the longitudinal direction, each roller being rotationally assembled on one of said axes.
Preferably, each row of rollers comprises one or several rollers stacked in a coaxial manner in the transversal direction.
Each roller can be rotationally assembled on its axis using a ball, roller or oil-ring lubricated bearing.
In the conveyor according to the invention, at least some of the rollers can have a different external diameter.
According to its preferred embodiment, the conveyor comprises a plurality of support bases aligned in the transversal direction, each support base being made integral to the chassis and bearing at least two mutually parallel side walls.
The support bases are advantageously butt-joint aligned in a transversal direction, and create a single row in the longitudinal direction.
Each support base has for example, downstream from the side walls in the longitudinal direction, a latch rod of substantially triangular section whose upper face drops below the rolling surface and moves further and further from the side walls.
Each latch rod can have a lower face and a downstream edge in the shape of a comb and imbricated into the second drive system.
The assembly and maintenance of the conveyor according to the invention can be optimised by fitting each support base to the chassis in a detachable manner, the latter bearing two ends with respective means of assembly onto a fixed infrastructure.
Other characteristics and advantages of the invention will emerge from the below description, given by means of example and non restrictive, with reference to the annexed diagrams, among which:
As previously stated, the invention relates to a conveyor intended to integrate into a conveying system, such as a pedestrian conveyor, notably allowing pedestrians to be moved via a translation in a longitudinal direction L.
Such a system typically comprises a first active drive system 1, for example a motorised conveyor, a second active drive system 2, for example an endless belt put into motion by another motorised roller, the conveyor according to the invention being passive, that meaning not itself motorised, and placed between the two active drive systems 1 and 2 in the longitudinal direction.
The conveyor, the object of this invention, knowingly comprises a chassis 3 and means of rolling 4.
The chassis 3 extends in a transversal direction T, perpendicular to the longitudinal direction L.
At each of its ends, this chassis 3 is equipped with means of assembly 30 allowing it to be fitted to a fixed infrastructure (not shown).
The means of rolling 4 are at least indirectly supported by the chassis 3 and define a rolling surface R.
As is shown more accurately in
Instead of being comprised of balls or rollers in the respective channels as in the known device, the means of rolling 4 of the conveyor according to the invention are comprised of rollers rotationally assembled on the axes.
To achieve this, this device first and foremost comprises a plurality of side walls, such as 51 to 54, each of which is integral to the chassis 3 and extends in a plane perpendicularly to the transversal direction T.
Each side wall terminates with an upper edge, such as 510 to 540, which is set back compared to the rolling surface R, that being below this surface when the conveyor is horizontal.
This device furthermore comprises a plurality of axes, such as 61 to 66, each of which extends parallelly to the transversal direction T and crosses at least two adjacent side walls, such as 51 and 52.
Finally, each roller 4 is rotationally assembled on one of the axes 61 to 66, the rollers 4 being collectively laid out to create a set of several successive rows, numbered 41 to 46 and mutually adjacent to the longitudinal direction L.
As is best seen in FIGS. 1 to 3, the side walls are advantageously held by the support bases 7 each of which is fixed to the chassis 3 in a detachable manner, for example through the use of screws such as 8 inserted into orifices 710 made in a back wall 71 of this support 7.
The support bases 7 are fixed to the chassis 3 so as to be butt-joint aligned in the transversal direction T, and so as to create a single row in the longitudinal direction L.
Each support base can comprise more than two side walls, and for example four side walls 51 to 54 as illustrated in the figures.
Furthermore, the rollers can be bigger or smaller in size in the transversal direction T.
Nevertheless, it is advantageous that each of the rows of rollers, such as 41 to 46, comprises several rollers 4 stacked in a coaxial manner in the transversal direction T, even on the same support base 7.
At least some of the rollers 4 can have a different external diameter, and each roller can be rotationally assembled on its axis, such as 61 to 65, using a ball, roller or oil-ring lubricated bearing.
Each support base 7 advantageously has a latch rod 70 of substantially triangular section placed downstream, in the longitudinal direction L, in relation to the back wall 71 of this support and to the side walls 51 to 54 which extend from it.
As
Furthermore, the lower surface 701 and the downstream edge 702 of the latch rod 70 of each support 7 are advantageously comb shaped so that they can be imbricated into the second drive system 2, for which purpose they adopt a complimentary shape.
| Number | Date | Country | Kind |
|---|---|---|---|
| 03/01994 | Feb 2003 | FR | national |
