Patent ID: 9364774
Filing Date: 2016-06-14
CPC Classification: B01D,B65G,F16G

Claim Text:
1. A chain structure comprising: a sprocket wheel in which a plurality of gear teeth capable of engaging with a chain are formed in an outer peripheral portion; and the chain in which a pair of side plate members facing to each other are coupled in an endless manner at plural sets in a length direction, and which is wound around gear teeth in the outer peripheral portion of said sprocket wheel, wherein a protruding plate portion for preventing the side plate member from dropping from a wound state to the sprocket wheel is provided in at least a part of the plural sets of said side plate members, wherein said protruding plate portion includes a base end plate portion which protrudes out of a center portion of the side plate portion in a longitudinal direction so as to extend in a radially inward direction of the sprocket wheel, an intermediate plate portion which is folded from a leading end portion of the base end plate portion so as to extend in such a direction that goes away from the paired side plate portions, and a vertical plate portion which is folded from a leading end portion of the intermediate plate portion so as to extend in the radially inward direction of the sprocket wheel, and wherein said side plate member is configured such that a portion of the sprocket wheel side except for the portion where said protruding plate portion is provided is located radially more outward than the intermediate plate portion.