Shima Seiki Manufacturing Limited

Shima Seiki Mfg., Ltd.

Hiroyuki Ueyama

Toshiaki Morita

Toshinori Nakamori

Yoshinori Shimasaki

Yoshiteru Koyama

Masanori Inumaki

Sadamu Nakahata

Masanori Goto

Masato Morita

Daisuke Tajima

A plurality of control magnetic poles-are provided in each selection unit of a selection actuator, and the upstream control magnetic polesand downstream control magnetic polesare controlled independently based on the relative positions thereof to selectors. The selectors can be selected with a pitch approximately half the pitch at which selection is possible with the conventional selection actuator and the time used for selecting each selector can be extended. Therefore, a knitting member can be reliably selected even in a fine-gauge knitting machine.

Selection actuator for knitting member

In a magnetic-type needle selection device of a flat knitting machine, a power supply control device controls a current-application interval, during which an electric current is applied to a selector actuator, in accordance with the moving speed of a carriage. The power supply control device is structured so that, when the moving speed of the carriage is high, the current-application interval is lengthened by moving further forward a power-supply starting position than when the moving speed of the carriage is medium. When the moving speed of the carriage is low, the current-application interval is shortened by moving further backward the power-supply starting position and moving further forward a power-supply stopping position than when the moving speed of the carriage is medium.

Magnetic needle selecting device of weft knitting machine

A selector actuator is provided with two controlled attraction parts ( ) and three non-controlled attraction parts ( ). In the controlled attraction part ( ), two magnetic coil poles having attraction sites ( ) at their top ends are arranged with a magnet in between them. In the non-controlled attraction part ( ), three yokes ( ) having attraction sites ( ) at their top ends are arranged with two permanent magnets ( ) sandwiched in between them. The controlled attraction part ( ) and the non-controlled attraction parts ( ) are similarly arranged, respectively. Each magnetic coil pole is arranged to oppose to the ends of two yokes of the same non-controlled attraction part. Hence the magnetic flux leaking from the yoke to the magnetic coil pole flows in a direction substantially perpendicular to a direction in which the attraction site of the magnetic coil pole attracts knitting members, and the magnetic flux leaking from the yoke does not affect needle selection.

Selector actuator for knitting members in a knitting machine

In a knitting member selection actuator ( ) of a knitting machine, there is provided between a pair of yokes a magnetic property means ( ) for making a magnetic reluctance between the confronting yokes ( ) of an uncontrolled attraction region ( ) larger than a magnetic reluctance between the yokes of the uncontrolled attraction region and the knitting member attracted to attraction surfaces and also smaller than a magnetic reluctance between the yokes of the uncontrolled attraction region and attraction surfaces of the adjacent controlled attraction region ( ).

Knitting member selecting actuator of knitting machine

Needle beds are provided with needles, needle jacks and select jacks and selectors, and the selectors are provided with three butts. The front butt is made to contact the reference plane of the carriage to serve as the fulcrum of rocking. The second butt is used to withdraw the selector, and the tail butt is used to advance the selector. Two pressing cams of the carriage press the tail butt to make the selector to be attracted by a permanent magnet. Two raising cams of the carriage advance the selector to the H position and the A position.

Needle selection device of flat knitting machine

A bistable solenoid for use with a knitting machine. The bistable solenoid includes an enclosure made of magnetic material which includes bearing surfaces at opposite ends. A plunger having a central region made of magnetic material and outer end regions made of non-magnetic material is movable within the enclosure for operation of a cam of a knitting machine. The movable plunger is controlled by axially aligned permanent magnets which are spaced from each other by a yoke. The permanent magnets are sandwiched between magnetizable coils which move the plunger toward the coil that is excited. The plunger is spaced radially from the coil's magnets and bearing so that very little wear is brought about during use in operating the cam of the knitting machine.

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Wakayama, Japan

Hiroyuki Ueyama