Railways – Traction – Chain
Patent
1996-09-05
1998-11-24
Le, Mark Tuan
Railways
Traction
Chain
1041725, 198686, B65G 1900
Patent
active
058393714
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a mono- or twin-rail overhead chain conveyor, in particular for transporting heavy loads such as motor vehicle parts, having a chain track in the form of an I-shaped profile with running gear which can move along said track and having roller blocks for mounting rollers which are supported on the chain track, said roller blocks being connected to a traction means for pulling the running gear and said running gear being designed for a mono-rail overhead chain conveyor in the form of loading running gear and for a twin-rail overhead chain conveyor in the form of towing running gear which interacts with loading running gear movable on a load rail running below the chain track.
Mono- and twin-rail overhead chain conveyors are continuous conveyors in which the conveyed material is always transported underneath a single-stranded traction means, i.e. suspended. The conveying process is positive here, with the conveying track being disposable anywhere within the area and with curves being possible in both the horizontal and vertical planes.
As a general principle, steel chains in the form of bolt-linked and flat-linked chains are used as the traction means. Steel ropes or textile ropes are only possible for lightweight mono-rail overhead chain conveyors, so that positive drives are automatically assured as a rule.
Regardless of the type of traction means, however, it requires intensive servicing and inspection.
An endless conveyor is known from NL-A-7 014 018 in which a cable sheathed, for example with nylon, as corrosion protection is used as the traction means. In addition to the classic mono- or twin-rail overhead chain conveyors, as illustrated and described in--for example--"Lueger Lexikon der Technik, Fordertechnik und Fabrikorganisation Vol. 1, p. 246 ff., published by Rowohlt Taschenbuch Verlag GmbH, Germany, a large number of suspension conveying devices are known with design features that can differ from those described at the outset. For example, in a hanger-type conveyor according to DE-AS 1 230 354, a pulling belt running on edge is used, in which several pulling ropes parallel in the longitudinal direction are vulcanized in. A corresponding hanger-type conveying system is however suitable exclusively for use in a horizontal plane, since otherwise a tensile strain would be exerted on the pulling ropes arranged one above the other that varies widely enough to break these ropes.
Suspension devices intended for the transportation of garment products are described in DE 40 17 821 A1 and DE 35 10 195 A1. Here a drive belt can interact with driving dogs of supporting brackets to move the latter along a guide track formed by a square section. Specially designed plastic rails are required for guidance of the drive frame.
In the case of load carriers according to DE 41 21 772 A1, DE 27 40 594 A1, U.S. Pat. No. 26,78,718, U.S. Pat. No. 2,980,258 or DE 25 45 676 A1, chain links are used that are drivable using friction wheels, for example. The chain links can be connected at their connection points to towing running gear.
The object underlying the present invention is to develop a mono- or twin-rail over-lead chain conveyor of the type mentioned above such that an almost maintenance-free traction means can be used that is drivable without problem and which can be guided simply in respect of the route, however without the need for design changes to the mono- or twin-rail overhead chain conveyor at least in respect of the chain track and loading track.
The problem is substantially solved in accordance with the invention in that the traction means is comprising a rubber or plastic material having a single-stranded insert of metal, glass fiber or carbon fiber. In particular, the belt is a rubber belt with rectangular cross-section, into which is vulcanized a steel insert preferably concentrically to the longitudinal axis of the belt.
By the teachings in accordance with the invention the drawbacks immanent in known mono- or twin-rail overhead chain conveyors because of the bolt-linked and flat
REFERENCES:
patent: 3127006 (1964-03-01), Tochtermann et al.
patent: 3972140 (1976-08-01), Casparro
Fredenhagen GmbH & Co. KG
Le Mark Tuan
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