US 5,287,709 AGranted

Stitch density adjusting device of circular knitting machine

AssigneeNagata Seiki Kabushiki Kaisha

InventorsMasahiro Seino, Kazuhiko Tamaki, Hidemasa Sakamoto, Minoru Oboshi, Yutaka Kaneuchi

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Abstract

In a stitch density adjusting device of a circular knitting machine for knitting stockings, panty hose, tights and so on, a needle cylinder is moved up and down for adjusting the density of the stitches being formed. In order to move the needle cylinder up and down, a knitting control unit having a knitting program set therein supplies a control signal to a reversible pulse motor which causes the needle cylinder to move through a movement transmission mechanism. The temperature rise in the knitting head due to friction is detected by sensor in the head and compared with a set value in a comparator which delivers a temperature difference signal to the knitting control unit. The control unit operates to compensate for the temperature rise by controlling the pulse motor.

Claims9

Dependent claims

A stitch density adjusting device of a circular knitting machine having a needle cylinder, and a knitting head provided outside the needle cylinder, comprising:

rotatable fashioning cam means;
a rising member acted upon by the fashioning cam means so as to pivot on a rising pin in a manner to move the needle cylinder up and down for stitch density adjustment;
sliding support means for supporting said rising pin in a vertically shiftable manner;
motor means;
means operated by said motor means to adjustingly shift said rising pin vertically thereby to finely adjust the rising member in vertical position for fine adjustment of the stitch density;
an adjusting lever pivotally mounted at an intermediate position thereof and having one end driven by said motor means and the other end associated with said rising pin;
and
said sliding support means comprising a sliding support of U-shaped cross section having two opposite side walls and receiving said other end of the adjusting lever slidably therein, and a saddle slidably received in said sliding support and resting on said other end of the adjusting lever so as to be slidingly shifted vertically when the adjusting lever pivots, said rising pin being carried by the saddle.

5 more elements

Dependencies are inferred from the claim text.