| 主权项 |
1. An interlocking chain unit that forms a rigid chain part by forming an interlock between a pair of interlocking chains, each including an inner tooth plate and an outer tooth plate arranged externally to the inner tooth plate, the interlocking chain unit comprising:
a pair of case plates positioned external to a pair of interlocking chains, and a sprocket shaft, wherein the pair of case plates supports the sprocket shaft such that the sprocket shaft can rotate freely; a guide plate arranged between the case plates, the guide plate guiding the interlocking chains, and the guide plate comprising a passage hole; and a stepped rod that determines the position of the pair of case plates and that of the guide plate relative to each other, wherein the stepped rod has a small-diameter part and a large-diameter part, each extending in a chain width direction, the large-diameter part is near a first case plate of the pair of case plates with respect to a center of the stepped rod, the large-diameter part has a guide plate side step near the guide plate and a case plate side step near the first case plate, the small-diameter part passes through a passage hole provided in the guide plate, each of the pair of case plates comprising an inner surface, and the stepped rod has opposite end portions fitting in respective countersunk holes formed in the inner surfaces of the case plates, the guide plate side step abuts on a rim of the passage hole of the guide plate, and the case plate side step abuts on a rim provided on a countersunk hole disposed in the first case plate. |
