Textiles: knitting – Independent-needle machines – Straight
Patent
1981-05-28
1983-10-18
Feldbaum, Ronald
Textiles: knitting
Independent-needle machines
Straight
66 78, D04B 700
Patent
active
044098014
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a needle selecting method and apparatus in a flat knitting machine. More particularly, the present invention relates to a needle selecting method and apparatus in which three positions of needles, that is, knit, tuck and welt positions, are selected by needle operations including electric operations in forming knitted fabrics.
2. Background Art
In a flat knitting machine, when needles are electrically selected, an electromagnet or the like is used and by putting on and off the electromagnet or the like, movements of the electromagnet or the like are appropriately transmitted to needles to control movements of the needles. According to this operation, however, the needles are selected and divided only in two groups. There also is known a needle selecting method in which an electric needle preselecting system is combined with a lock. However, in this method, since one preselecting system is provided for one lock, a knitting operation cannot be performed at a high efficiency, and the stroke of a carriage is large.
In a flat knitting machine, there is adopted a needle selecting method in which in selecting the knit, tuck and welt positions for needles by mechanical means, a prism is used to divide needles into needles at the welt position and needles at the other position and needles at the position other than the welt position are further divided into needles at the tuck position and needles at the knit position.
In this method, the butt height of needles to be located at the tuck position is made different from the butt height of needles to be located at the knit position, and the needles should be divided into high needles and low needles. Accordingly, in this method, the kinds of needles are restricted and patterns cannot freely be selected, and when patterns are changed, also the kinds of needles should be changed.
DISCLOSURE OF INVENTION
In the apparatus of the present invention, needle selecting members are disposed on both the sides of one lock on a carriage.
According to the method of the present invention, needles which have already performed the knitting operation are preliminarily selected and divided into two groups by a needle selecting member located on the rear side in the direction of advance of a carriage, and at the time of subsequent reversion of the movement of the carriage, needles of one group of the two groups divided by said preliminary selection are further selected and divided into two groups by a needle selecting member located on the front side in the direction of advance of the carriage, whereby the three positions are selected for the needles.
By virtue of the above characteristic feature, according to the present invention, selection of the three positions for needles can be accomplished by one lock and needle selecting members located on both the sides of the lock, and preliminary needle selection and secondary needle selection can be performed during one stroke of the carriage. Moreover, the width of the movement of the carriage to the knitting width can be reduced.
Furthermore, needles need not be changed when patterns are changed, and arrangement of patterns can freely be made.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a longitudinally sectional, side view showing a needle bed.
FIG. 2 is a plan view of the cam arrangement of a one-lock carriage, seen through a ground plate for cams.
FIG. 3 is a plan view of the cam arrangement of a two-lock carriage, seen through a ground plate for cams.
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows the section of a needle bed. Reference numeral 1 represents a needle bed, and needles 3, jacks 4, select jacks 5 and selectors 6 are slidably fitted in needle grooves 2 formed on the needle bed 1 and arranged at equal intervals in parallel to each other. The bent top portion of the jack 4 is fitted in a recessed portion of the needle 3 so that the jack 4 and needle 3 can slide integrally. Reference numeral 7 represents a jack butt. The select jack 5 has on the lower e
REFERENCES:
patent: 3693377 (1972-09-01), Hadham
Feldbaum Ronald
Shima Idea Center Co., Inc.
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