Chain conveyer system

Claim 1

A chain conveyor system, comprising a main roller chain stretched and driven along a predetermined transportation path, an auxiliary roller chain having the same pitch and same total length as said main roller chain and arranged in side by side relationship with said main roller chain and in a plane which is parallel to the plane in which said main roller chain is arranged, chain coupling links of equal effective length respectively coupling the roller shafts of said main roller chain to the roller shafts of said auxiliary roller chain, carriage supporting shafts respectively penetrating the links of said main roller chain rotatably at their midway points in the direction of said roller shafts and supporting carriages fixed thereto on the side opposite to the side of said auxiliary roller chain, coupling arms having the same effective length as said chain coupling links, one end of each of said coupling arms being fixed to said carriage supporting shafts respectively on the side of said auxiliary roller chain and the other end being pivoted at a midway point of a link of said auxiliary roller chain, whereby said chain coupling links and coupling arms maintain a parallel orientation throughout the system, and inner and outer chain guides in contact with rollers of said auxiliary roller chain to control the path of said auxiliary roller chain and to maintain said chain coupling links at a predetermined angle with respect to the horizontal plane.