Material or article handling – Opposed shelf-type elevator and transporter
Patent
1987-12-14
1989-09-05
Spar, Robert J.
Material or article handling
Opposed shelf-type elevator and transporter
414498, B60P 340
Patent
active
048633348
DESCRIPTION:
BRIEF SUMMARY
The present invention is an improvement to a roll-on, roll-off handling device which is intended to be mounted on wheels and adapted to lift one end of a container and to maintain it in the raised position during displacement or handling of the container, this element comprising:
a chassis,
an apron provided with means for removable attachment to one face of a container and articulated with respect to the chassis, and
means for adjusting the angle between the apron and the chassis.
In a device of this type, the apron is pivoted to the chassis at one extremity of this latter.
In order to carry out a handling operation, the chassis is inclined in such a manner as to ensure that said extremity is adjacent to the ground, whereupon the apron is attached to the container. After this, the angle between apron and chassis is varied in such a manner as to ensure that the chassis pivots towards the horizontal whilst the container is lifted. A similar device carries out the same operation at the other end of the container. During the displacement which follows, the container remains suspended between the two devices each mounted on wheels. The result thereby achieved is that the attachment between the container and each apron is subjected to all the stresses of road transport. The container is subjected to high bending stresses. The resultant wheel-base of the rolling unit (distance between the axles from one device to the other) is excessive.
The object of the invention is to improve the known device in order to remove therefrom the disadvantages which have been mentioned in the foregoing.
In accordance with the invention, the device is characterized in that the apron is pivotally mounted on a carriage which is axially displaceable along a chassis serving as a ramp chassis in a direction transverse to the axis of pivotal connection between the apron and the carriage, the pivotal axis being adjacent to one extremity of the chassis when the carriage is in an end position.
Thus, when lifting of the container is completed, the carriage is displaced along the chassis so as to engage the chassis beneath the container and steps are taken to ensure that the container rests on the chassis during a road tip, a handling operation, and so on. The container is therefore subjected to distinctly less unfavorable stresses. Moreover, the engagement of the chassis beneath the container at each end of this latter reduces the wheel-base of the assembly and restores it to an acceptable value in regard to the maximum permissible values. The invention thus provides the means of very readily constructing a road-transport unit (which is capable of traveling at speeds of the order of 100 km/h) with very simple means which can very easily be put to use on the basis of a container which does not require any preliminary arrangement other than the attachment means usually imposed by current standards.
Preferably, the means for adjusting the angle between the apron and the chassis comprise a jack pivotally attached to the apron at a distance from the pivotal axis and to the chassis at a distance from the aforesaid extremity thereof, and the means for adjusting the angle between the apron and the chassis further comprise means for selectively locking the apron in position with respect to the carriage in order to ensure that the jack is capable on completion of the locking operation of serving to displace the carriage along the ramp-chassis.
Thus the same jack serves to orient the apron with respect to the chassis and to displace the carriage axially along the chassis, depending on whether the locking operation is achieved or not.
The means for selectively locking the pivotal displacement of the apron can comprise at least one removable spacer member for triangulating the apron and the carriage.
The means aforesaid are advantageously capable of locking the apron in a position in which the chassis makes an angle of slightly less than 90.degree. with the container face concerned when the apron is attached to this latter.
When the apron is locked in th
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"Train TMTS 10", LOHR pamphlet, Ref. 1435, F0000 28 886.
"Mise au sol RMTS 10", LOHR pamphlet, Ref. 1439, F000 38 890.
"Mise au sol TCMTS 10", LOHR pamphlet, Ref. 1442, F000 28 896.
Katz Robert S.
Spar Robert J.
Toutenkamion
LandOfFree
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