Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1996-08-12
1999-01-19
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Endless conveyor
198811, B65G 1508
Patent
active
058605100
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a hose belt conveyor.
BACKGROUND OF THE INVENTION
Such a hose belt conveyor is known from the German Offenlegungsschrift 4,036,731. To drive the adjacent thickened parts the abutting sides are provided with opposed recesses to accommodate a wire structure comprising two interconnected wires. These wires have to transmit driving forces.
This structure is relatively complicated but necessary to guarantee sufficient drive for the thickened parts.
From the British patent application 2,007,178 a hose belt conveyor is known wherein the thickened parts are trapezium-shaped. When these thickened parts lie against each other, a V is formed with an angle greater than 120.degree.. The two parts of the V may be supported on rollers, as shown in FIG. 3 of this British Patent Specification. It is necessary here for the thickened parts to be pressed against each other, and this is achieved by making the rollers stepped. The first part acts upon the above-described V-forming part, while the second part of the rollers connects to the top side of the trapezium of each of the thickened parts. This means that the rollers have to be of relatively complex design and that a considerable measurement tolerance is necessary. If the distance between the parallel outsides of the thickened parts is reduced through wear, it will be necessary to adapt the spacing of the raised sides of the rollers. For this purpose, it is necessary to provide for the rollers to move relative to one another. In the case of the design according to this British Patent Specification, the drive is by means of a pair of rollers which enclose the trapezium-shaped thickened part on all sides. Such a drive is relatively complex and, as in the case of conventional conveyor belts, is generally provided at only one place. This makes it necessary for the belt to be provided with longitudinal reinforcements for absorbing the driving forces produced by the single drive motor and extending over the length of the belt. Such a drive also means that the length of such belts is limited, because the driving forces would otherwise become too great for the longitudinal reinforcement, or because otherwise the belt becomes expensive.
From the PCT-application 93/08107 a hose belt conveyor is known wherein the sides abutting each other are perpendicular to the extension of the hose belt. It is not possible to clamp the thickened parts between two V-shaped driving or guiding members.
The invention aims to provide a more simplified design for hose belt conveyors.
SUMMARY OF THE INVENTION
The invention is based on the idea that the two thickened parts should be designed in such a way that if they are placed against each other a V is produced, more or less corresponding to the V used in belt drives. It has also been found that if the angle range according to the invention is used, the two thickened parts do not have the tendency to slide past each other, and if they are placed between rollers placed at a corresponding angle, a self-centering effect occurs. This makes it unnecessary for the thickened parts to be provided with further peripheral edges which have to be in engagement with guide and/or drive means.
It is also not necessary to incorporate further drive structures such as interconnected wires.
Should wear of the thickened parts occur, the V formed will lie "deeper" in the space bounded by the drive or guide means, and it is not necessary to design these drive or guide means so that they can be moved relative to each other. It has also been found that with this embodiment it is extremely simple to provide a drive by placing the V formed by the thickened parts in a correspondingly shaped cavity consisting of two rollers placed opposite each other at essentially the same angle as the angle of the V. If at least one of the rollers is driven, this can provide for the drive of the hose belt conveyor according to the invention. If such a pair of rollers is fitted at regular intervals along the length of the pocket conv
REFERENCES:
patent: 3164238 (1965-01-01), McCullagh
patent: 3661244 (1972-05-01), Koyama
patent: 3734270 (1973-05-01), Foody
Dunlop-Enerka B.V.
FMW Forderanlagen und Maschinebau GmbH
Valenza Joseph E.
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