| 摘要 |
PURPOSE: A chain sprocket is provided to easily guide a film piece to a winding device without holding the film piece in a chain by transforming a sprocket structure. CONSTITUTION: A chain sprocket(30) is formed by integrally forming a separation guide plate of a wrapping film on bosses of a sprocket wheel having a tooth to be separated from the sprocket wheel. The diameter of the separation guide plate is over the diameter of a chain(20) to be combined with the tooth of the sprocket wheel. Thereby, the chain sprocket guides the wrapping film while covering the outside of the chain to be combined with the chain sprocket. Therefore, the insertion of a wrapping film in the chain is prevented and the film piece is safely and smoothly carried to a winding device.
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