US 5,359,865 AGranted

Interlock knitting machine for jacquard knitting

AssigneePrecision Fukuhara Works, Ltd.

InventorHidetoshi So

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Abstract

A circular interlock knitting machine of the interlock butting type including jacquard knitting includes a rotating cylinder having cylinder needles movable between welt, tuck and knit positions, dial needles movable between welt and knit positions along paths of travel which intersect the paths of the cylinder needles, and a needle selection and operating mechanism for the cylinder needles which prevents collision between cylinder and dial needles including an intermediate jack beneath each cylinder needle, a lower jack beneath each intermediate jack, the lower jacks being selectively movable between operative and non-operative positions, lower jack raising cam means for raising the lower jacks in the operative position from the bottom position to the welt position, intermediate jack raising cam means selectively movable between operating and non-operating positions for engaging, when in operating position, and raising from the welt position to the tuck position only those intermediate jacks raised by the selected lower jacks beneath cylinder needles which will not collide with dial needles being moved to the knit position.

Claims15

Dependent claims

In a circular interlock knitting machine for jacquard knitting having a cylinder with vertical grooves therein, a cylinder needle slidably mounted in each of the cylinder grooves for movement between welt, tuck and knit positions, intermediate and lower jacks slidably mounted in each cylinder groove beneath said cylinder needle, a dial operatively associated with said cylinder and having dial grooves extending radially in one side thereof, at least one dial needle slidably mounted in each dial groove for movement between welt and knit positions along paths of travel which intersect the paths of travel of said cylinder needles, dial needle operating cam means for selectively moving certain of said dial needles from the welt position to the knit position, the combination therewith of cylinder needle selection and operating means for selecting certain of said cylinder needles for movement from the welt position to the knit or tuck positions while avoiding any collision of said cylinder needles with said dial needles, said needle selection and operating means comprising

(a) lower jack raising cam means for raising selected lower jacks from a bottom position to the welt position,
(b) means for selectively moving the lower jacks in the cylinder grooves containing the cylinder needles selected for movement to the knit or tuck positions into the path of said lower jack raising cam means so that said selected lower jacks are raised from the bottom position to the welt position and said selected lower jacks raise corresponding intermediate jacks from a bottom position to the welt position, and
(c) intermediate jack raising cam means selectively movable between operating and non-operating positions responsive to the selection of said dial needles and said cylinder needles for movement from the welt positions to the knit or tuck positions for raising from the welt position to the tuck position only those intermediate jacks beneath cylinder needles which will not collide with dial needles which have been selected for movement to the knit position.

A needle selection and operating apparatus for a circular interlock knitting machine of the interlock butting type having cylinder needles and dial needles movable along intersecting paths of travel, said needle selection and operating apparatus being characterized in that collisions between cylinder needles and dial needles is prevented even if a cylinder needle is wrongfully selected, said needle selection and operating apparatus comprising

an intermediate jack adapted to be mounted beneath each cylinder needle for raising the cylinder needle from a welt position to a tuck position,
a lower jack mounted beneath said intermediate jack for movement longitudinally to raise said intermediate jack from a bottom position to the welt position, said lower jack being movable between operative and non-operative positions,
lower jack raising cam means for raising said lower jacks in the operative position from a bottom position only to the welt position,
lower jack selection means for selectively moving certain of said lower jacks to the operative position and the remainder of said lower jacks to the inoperative position, and
intermediate jack raising cam means selectively movable between operating and non-operating positions for engaging and raising from the welt position to the tuck position only those intermediate jacks of said intermediate jacks raised by said lower jacks beneath cylinder needles which will not collide with dial needles being moved to the knit position.

2 more elements

Dependencies are inferred from the claim text.