| 摘要 |
The present invention provides a chain for use in a three-dimensional conveyor line, formed from synthetic resin-made chain links A connected endlessly to each other by a shaft pin C. The chain link A includes a top plate part A2 on which a product to be conveyed is placed, and a link part A1 formed under the top plate part to couple two adjacent chain links to each other and which includes a projecting head portion 1 and a pair of leg pieces 2. The upper surface of the projecting head portion 1 is formed circular nearly along a circle whose center lies on the longitudinal axis of the shaft pin C and smoothly contiguous to the upper surface of the top plate part A2. The length of the top plate part A2 in the conveying direction is set shorter than the chain pitch. The top plate part A2 has a lower slant face 11 formed on the front edge thereof, and also formed on the central rear edge thereof a curved concavity 7 with a concave slant face 7a. Owing to the above construction, even if an opening takes place between the top plate parts of the two adjacent chain links, the projecting head portion can be prevented from making a large step so that products can smoothly be conveyed without being thrust up, caught or overturned. Thus, the chain links can be moved largely and smoothly in relation to each other without interference with each other to provide a wider conveying or supporting surface for the products which are to be conveyed. Namely, the conveyor chain according to the present invention permits to provide a three-dimensional conveyor line simply constructed, easy to manufacture, suitable for mass production, highly durable and very inexpensive.
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