Railway rolling stock – Suspended – Single rail
Patent
1996-03-01
1997-06-03
Morano, S. Joseph
Railway rolling stock
Suspended
Single rail
105148, 104112, 212328, B61B 706
Patent
active
056344074
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a transport cableway for transporting heavy loads of the type including a motor-driven cable winch and a drive for displacing a housing containing at least one motor as well as running rollers for a carrying cable.
BACKGROUND AND SUMMARY OF THE INVENTION
Transporting cableways of the initially defined kind are used, in particular, in impassable terrain, for instance, to carry trees down into the valley in forestry, or to get down any other heavy loads. When transporting trees, and after having installed the appropriate supports for the carrying cable of a cableway, the trees or loads to be transported away are not aligned with of the carrying cable, and must be seized and pulled up laterally of such carrying cables of the cableway. It is known to equip cableways of the initially defined kind with housings carrying cable winches and containing the drive motor. Usually, a Diesel generator coupled with a hydraulic pump is used for driving such transportation cableways. If loads are seized by means of such a cableway housing laterally of the fall line or laterally of the projection of the carrying cable, the transport housing is caused to make a more or less large excursion from its vertical position, thus entailing the overall risk of the lubrication of the drive motors being impeded due to an inadmissibly slanted position, which even may cause the drive to be automatically switched off. In such configurations in which the cable winch is directly connected with the housing, it must be remembered, that the housing walls, and/or the housing itself, are made of stable heavy materials, which implies a relatively large weight for the cableway housing itself. Finally, such an excursion of the heavy drive motor from its vertical position due to reaction forces eccentrically applied during the use of the cable winch results in an undesired pendulum oscillation of the heavy motor and of the housing as the reaction forces rapidly decrease, for instance, upon lifting of the load from the bottom, thus excessively stressing the pylons or supports of the carrying cable, as well as the carrying cable itself.
In U.S. Pat. No. 3,022,747 a transport and lifting arrangement is proposed, which, as opposed to known rigid systems, allows for the perpendicular alignment of the drive motor. That position of the motor is obtained by the articulated connection of the rollers with the housing carrying the motor, the housing at the same time taking over any loads. The two rollers, however are not coupled in a rigid manner.
The invention here aims at further developing a transportation cableway of the initially defined kind with a view to being able to use more light-weight structural components for the motor housing and to unacceptable excursions of the motor housing during operation. Furthermore, the invention aims at considerably increasing the operational safety, in particular, if reaction forces of the load suddenly get slight, and at avoiding overloading of the carrying cable or of the supports. To solve this problem, the configuration according to the invention substantially is such that the running rollers are journalled in or on a carrier rigidly connected with the housing carrying the drive motor, that a hook-shaped stirrup partially encompassing the carrying cable is mounted on a part rigidly connected with the housing so as to be pivotable about the carrying cable, and that the cable winch is fixed to the pivotable stirrup.
By arranging a hook-shaped stirrup partially encompassing the carrying cable in addition to the carrier for rollers that cooperate with the carrying cable, and by fixing the cable winch thereto, it is ensured that, when eccentrically pulling in heavy loads using the cable winch, an excursion of only this additional stirrup is caused, and the drive motor as well as the hydraulic drive are able to remain in a substantially perpendicular position. The risk of the lubrication being interrupted in such cases is eliminated in this manner, and by the fact that the load
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patent: 2730047 (1956-01-01), Rollongs
patent: 3018738 (1962-01-01), Naud
patent: 3022747 (1962-02-01), McIntyre
patent: 3750591 (1973-08-01), Makinster et al.
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