Patent ID: 7412850

Claim:
A complex cam system mounted on a carriage which reciprocatingly moves along a longitudinal direction of needle beds opposed to each other across a needle bed gap of a weft knitting machine, for reciprocatingly driving knitting needles disposed in each of the needle beds in a width direction of the needle beds so as to advance and retract the knitting needles and allowing the knitting needles to carry out an operation for forming a knitted loop, and as well to carry out an operation for transfer between the needle beds, comprising: a needle raising cam for guiding a butt of the knitting needle along a path having a mountain-like shape portion symmetric with respect to a center line passing through a peak portion thereof and extending in the advancing and retracting direction of the knitting needle so that a hook of the knitting needle can advance to a knit position in the needle bed gap in both directions of reciprocating movement of the carriage; and a transfer cam in which mountain-like knobby-shaped paths for guiding the butt of the knitting needle are provided at a peak portion corresponding to the knit position of the needle raising cam, and on both sides of the peak portion, respectively, so that the hook of the knitting needle advances to a transfer position on a needle bed gap side closer than the knit position on the center line, wherein in a transfer operation, a guide path of the butt of the knitting needle on a knitted loop delivering side is shifted to the knobby-shaped path in a middle of the transfer cam while being raised by the needle raising cam, and is further guided so as to pass through a bump-shaped path on a downstream side of a moving direction of the carriage, and a guide path of the knitting needle on a knitted loop receiving side is guided so that the butt of the knitting needle on the knitted loop delivering side passes through the knobby-shaped path on a downstream side, and then the knitted loop locked by the knitting needle is received by the hook of the knitting needle on the knitted loop receiving side.