A roller chain incorporates a plurality of rolling members between a roller and a bushing. A thrust bearing plate is provided between the end surfaces of the roller and inside surfaces of inner link plates. The outer diameter of the roller is smaller than the widths of the inner link plates and the outer link plates and the roller is accomodated in a projected area of the widths of the inner link plates and the outer link plates.
To provide a cable protection and guide device, which suppresses wear powders and can be used without being contaminated even in a clean room or reduced-pressure environment, and in which even if link frame bodies are twisted each other, the mutual connection of the link frame bodies is not disconnected and connection and incorporation of the link frame bodies can be simply, reliably performed. In a cable protection and guide device in which a large number of rectangular link frame bodies 10 each comprising a pair of spaced link plates 11, 11, and connecting plates 12, 13 bridged over a bending inner circumferential side and a bending outer circumferential side of the pair of link plates 11, 11 respectively are articulately connected to each other by connecting pins 11c and connecting pin holes 11d formed in the link plates 11, the link frame bodies 10 are composed of a fluorine resin molded product and even if the link frame bodies 10 are twisted each other, the connecting pin 11c has pin length enough to maintain the fit into the connecting pin hole 11d.
