US 4,062,442 AGranted

Shutoff control apparatus for a conveyor

AssigneeGebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H.

InventorJurgen Schubert

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Abstract

A shutoff control apparatus is incorporated into a feed station where material is loaded onto a belt conveyor. The feed run of a conveyor belt is supported by interconnected roller assemblies forming a trough-shaped roller support at each of a plurality of spaced-apart locations where the roller supports are swingably carried by a stationary frame. A horizontally-arranged rectangular frame is supported by leaf springs within the stationary frame at a closely-spaced relation below the belt supporting roller assemblies. Plate members project upwardly from the rectangular frame to extend between the roller assemblies. A drive motor for the conveyor belt responds to a shutoff control switch which is actuated in response to movement by the rectangular frame. The frame moves when a sharp-edged object penetrates the conveyor belt and establishes a driving relation between the belt and one of the plate members together with a roller assembly. Means are provided for adjustably positioning the plate members and the movable frame within the stationary frame at the feed station.

Claims11

Dependent claims

A shutoff control apparatus for detecting tears by the penetration of an object through a conveyor belt at the feed run of a conveyor system, said apparatus including the combination of:

an endless conveyor belt forming a feed run and a return run,
a feed station including a stationary frame extending along in the direction of travel by said conveyor belt at the feed run thereof,
a plurality of roller assemblies each having interconnected arbor shafts swingably carried at each of spaced-apart locations by said stationary frame for a trough-shaped support for said endless conveyor belt at the feed run,
frame means extending within the stationary frame of said feed station, said frame means lying in a spaced relation below and independent of said roller assemblies,
means to support said frame means for movement in a longitudinal direction within said stationary frame,
members carried by said frame means while projecting upwardly therefrom at spaced-apart locations to lie in the gap formed between the spaced-apart locations of said plurality of roller assemblies, said members being disposed for engagement by an object penetrating the conveyor belt at the feed run, and
means including a shutoff control switch responsive to movement of said frame means below said rollers relative to said stationary frame for controlling movement by said conveyor belt.

4 more elements

Dependencies are inferred from the claim text.