Removably retaining pivot rods in modular plastic belts

Details Removably retaining pivot rods in modular plastic belts Removably retaining pivot rods in modular plastic belts

1990-11-08

1992-01-28

Valenza, Joseph E.

Conveyors: power-driven

Conveyor section

Endless conveyor

B65G 1706

Patent

active

050836609

ABSTRACT:
Headless pivot pins in flexible plastic modular belts for pivoting modular sections are desirable, but pose a problem in that they must be retained axially in place as the belt is loaded and used, generally under tension. This invention provides pivot pin retention means of low construction and installation cost by means of swivelling an interdigital belt module member, preferably of integrally molded plastic material, from a movable toe end to move about a swivel joint at an opposite anchored heel end out of its retention position blocking the pivot pin axial movement. One embodiment of the invention provides for swiveling of an end plate member at the edge of the belt in a plane normal to the belt and pivot pin axis forcibly away from a biased rest position at least partially covering a pivot pin aperture. Another embodiment positions a journalled post in a pivot pin aperture at the edge of the belt for removal by forcibly overcoming a resilient bias, preferably derived from characteristics and structure of the belt module plastic material, to move the journalled post out of the aperture so that the pivot rod can move out. Thus, headless pivot rods are employed without additional belt parts by manual actuation in assembling the belt or removing pivot rods in a simple manner that reduces belt material and assembly costs.

REFERENCES:
patent: 4949838 (1990-08-01), Lapeyre et al.

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