Material or article handling – Motion or draft responsive load handler and transporter – Ground engageable means
Patent
1992-08-03
1994-06-07
Huppert, Michael S.
Material or article handling
Motion or draft responsive load handler and transporter
Ground engageable means
414437, B66F 1100
Patent
active
053184009
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a pick-up device for loads, having means for engaging on the load and lifting it at one end over a low height, with one or more rollers so that the load can then be shifted with the pick-up device relative to a bearing face over which the rollers can move bearing the load.
The object of the invention is more particularly to provide such a pick-up device which can lift a load, in particular a so-called container, such as the so-called ISO container, at one end over a low height, so that it can be pulled onto, for example, the loading platform of a lorry through the rollers moving over the loading platform thereof. In this case the load need not be shifted, but the loading platform can be taken horizontally under the load, for example by reversing the lorry, as known per se (see, for example, U.S. Pat. Nos. 4,051,968, 4,492,507 or 4,026,429).
More particularly, the object of the invention is to provide a pick-up device of the above-mentioned type which is simple in design and reliable in operation, and which can easily and quickly engage on and be detached from the load.
To this end, a pick-up device of the type mentioned in the preamble is according to the invention characterized in that the engagement devices are designed in such a way that they can engage on the load at a distance from the axis of the rollers, and in that the device has engagement devices for a flexible pulling element such as a cable or chain, in order to move the load with said pick-up device over said bearing face, which engagement devices for said pulling element are also situated at a distance from the axis of the rollers, in such a way that the pulling force of a pulling element engaging thereon tries to swing the pick-up device relative to the rollers in the direction in which the load is thus being lifted.
If there is sufficient resistance to the horizontal movement of the load, then after the engagement of the device on the load the pulling element will initially not be capable of moving said load horizontally, so that the couple formed by the pulling force and the arm thereof up to the axis of the rollers exerts an upward swinging couple on the engagement devices on the load in order to lift the latter locally. If after said lifting the resistance to horizontal displacement of the load is reduced sufficiently (for example through the fact that it now rests only at the other end on the ground), then the load will be able to shift horizontally on further pulling on the pulling element, and during lifting a state of equilibrium is reached in which no further lifting takes place, but the load is moved horizontally. Instead of this, it is, for example, possible to reverse a tipping bridge or tilted loading platform of the lorry until it is below the load, while the load is taken up on the tipping bridge or the loading platform without horizontal movement by simultaneously with said reversing and to the same degree shortening the pulling element with a winch on the lorry. The reversing can also be produced by shortening the pulling element.
The invention also relates to a preferred embodiment of this principle, in which said engagement devices pivoting on the further device with bearings for the rollers engage on an eccentric shaft lying parallel to the axis of the rollers and at a distance from them between said axis and the engagement point on the load, and in which a cam is fitted both on said further device and on said engagement devices, placed in such a way that when, under the influence of the pulling element, said further device is rotated about the axis of the rollers in the direction of lifting of the load said cams come out of a position at a distance from each other into contact with each other.
Consequently, on the exertion of pull by the pulling element the eccentric shaft will move about the axis of the rollers and thereby lift the load slightly near the engagement devices, either through the resistance to horizontal movement of the load over its base at the other end, or through a connection of
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Huppert Michael S.
Keenan James
N.C.H. Hydraulische Systemen B.V.
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