Yamakyu Chain Kabushiki Kaisha

Yamakyu Chain Co., Ltd.

Keiji Ohara

Tsuyoshi Nakamura

Fukukazu Kato

The crossover conveyor chain system includes a first conveyor chain (S ) and a second conveyor chain (S ) crossing the first conveyor chain (S ) to transfer the product from the first conveyor chain (S ) to the second conveyor chain (S ) while reorienting the product to a direction nearly perpendicular to that on the first conveyor chain (S ). The first conveyor chain (S ) is supported on an end bar ( ) or a small-diameter sprocket, and the second conveyor chain (S ) is formed a plurality of chain unit pairs each including at least two types of chain units (A) different in length from each other and a coupling pin (B). Each of the chain units (A) has front convex portions ( ) and front concave portions ( ), disposed alternately at the front thereof, rear convex portions ( ) and rear concave portions ( ), disposed alternately at the back thereof, and a transfer overhanging portion ( ) formed integrally at one lateral thereof. The transfer overhanging portion ( ) has a beveled lower surface ( ) formed on the lower side, at the free end, thereof and an inclined upper surface ( ) formed on the upper side, at the free end, thereof. Because of this construction, the transfer overhanging portion ( ) can be set short, and so it can be formed not easy to flex and break as well as to flex vertically, which assures to transfer the product stably and smoothly and prevent the load (weight) of the product from concentrating on a limited portion of the conveyor chain. Therefore, the crossover conveyor chain system is highly strong, rigid and durable, easy to be designed lightweight and compact, simple in construction, suitable for mass production, easy to assemble, easy to handle, and less expensive.

Crossover conveyor chain device

A chain unit has a central rib extending transversely and protruding portions extending from the rib to the front and rear side alternatively. The protruding portion is defined by two vertical side walls extending from the rib with the same height and a closed end portion combining the end portions of side walls. The closed end portion has an opening so as to enable the chain units to be placed in a row and column by being coupled with a connecting rod. At least two connected end portions are cylindrical shaped so as to surround the opening, and the cylindrical surface of the two closed end portions engages with a tooth of the sprocket which enters between the side walls. At least two corresponding recesses are formed in the lower surface of the rib for providing enough space to accept the tooth of the sprocket. The bottom of the chain unit has a circular arc surface extending from the rib towards the front and rear sides. A flat surface at both ends of the protruding portions is formed such that the circular arc is in surface contact with an end bar having a predetermined radial curvature corresponding to the radium of a six teeth sprocket.

Conveyor chain unit and conveyor chain

A conveyor chain unit possessing a central straight rib extending longitudinally from one end of the unit to the other end. The rib has a vertical height extending from the conveying surface to the bottom surface of the unit. A plurality of pairs of vertical side walls extend from the rib perpendicular to through-holes to form projections. The projections are positioned alternately on opposite sides of the rib having equal interval spacing. The number of the projections on one side is even and identical to the projections on the opposite side. At least one pair of projections positioned on opposite sides of the rib have recesses that are formed at the rib, and the projections are connected along the full height of the rib and spaced in a manner that chain units may be coupled together interchangeably via projections on either side of the rib. cylindrical barrels are formed between the vertical side walls at the end of the pair of the projections for the engaging sprocket teeth contacting the cylindrical barrel to drive the chain unit bidirectionally.

Growing community of inventors

Tokyo, Japan

Keiji Ohara