Abstract: An object is to provide a guide shoe having a simple structure and suppressing a significant shift in pitch line while reducing friction losses and preventing possible noise. In a guide shoe having a shoe surface on which a traveling chain is guided, the shoe surface includes a plate guide surface which is formed on an upstream side of the shoe surface in a shoe longitudinal direction and on which only chain plates are slidably guided, a guiding protruding portion which is formed on a downstream side of the plate guide surface and on which only a chain roller or a chain bush is guided, and a continuously transitioning protruding portion that smoothly connects the plate guide surface and the guiding protruding surface together. Plate escaping portions are formed on opposite sides across the guiding protruding portion in a shoe width direction to avoid contact with the chain plates.

Abstract: A silent chain is provided, which can avoid impinging contact between guide plates and sprocket teeth and prevent wear loss and noise. A guide plate includes a main guide part formed on a side that engages with a sprocket, and an additional guide part formed on at least one of front and rear edges in the longitudinal direction of the chain. The additional guide part protrudes more in the longitudinal direction of the chain than an outer flank of a middle plate arranged in the same guide row and has a size that allows the additional guide part to overlap a sprocket tooth in the chain width direction when engaged with the sprocket S.

Abstract: An object is to provide a guide shoe having a simple structure and suppressing a significant shift in pitch line while reducing friction losses and preventing possible noise. In a guide shoe having a shoe surface on which a traveling chain is guided, the shoe surface includes a plate guide surface which is formed on an upstream side of the shoe surface in a shoe longitudinal direction and on which only chain plates are slidably guided, a guiding protruding portion which is formed on a downstream side of the plate guide surface and on which only a chain roller or a chain bush is guided, and a continuously transitioning protruding portion that smoothly connects the plate guide surface and the guiding protruding surface together. Plate escaping portions are formed on opposite sides across the guiding protruding portion in a shoe width direction to avoid contact with the chain plates.

Abstract: A silent chain is provided, which can avoid impinging contact between guide plates and sprocket teeth and prevent wear loss and noise. A guide plate includes a main guide part formed on a side that engages with a sprocket, and an additional guide part formed on at least one of front and rear edges in the longitudinal direction of the chain. The additional guide part protrudes more in the longitudinal direction of the chain than an outer flank of a middle plate arranged in the same guide row and has a size that allows the additional guide part to overlap a sprocket tooth in the chain width direction when engaged with the sprocket S.