Importance

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Abstract

An apparatus for assemblying link chains of the type having paired links joined together with cross pins joining successive pairs of links longitudinally as chain links having a pitch corresponding to the distance between successive cross pins connecting the paired links. The apparatus has a pair of opposed presses each having a corresponding ram head. The ram heads are cylically operated from a retracted starting position and advanced toward each other and retracted to their retracted position. The ram heads are provided with tools on tool bars for transporting and assemblying paired links on successive cross pins. A trolley travels between the ram heads in a diection forwardly three half pitches and then in a reverse direction two half pitches. The trolley upon reaching the second reverse half-pitch returns to the forward movement of its next operating cycle. The trolley advances successive individual cross pins spaced along the path of travel and thus transports the link chain assembly. The tools on the ram heads position the links onto opposite ends of stationary two successive cross pins as paired links. The links are held in assembly on the cross pins by retainer rings fixed on opposite ends of the cross pins when the cross pins are stationary at the end of the reverse or backward movement of one half pitch by the trolley.

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First Claim