FIELD OF THE INVENTION

The present invention relates to a flat knitting machine structure, and in particular to a flat knitting machine structure which can adjust the size of a gap through knock-over bits.

BACKGROUND OF THE INVENTION

The existing knitting of three-dimensional fabric with adjustable thickness is generally realized by a warp knitting machine, as disclosed in patents of CN 102704180A, CN 102978823A and CN 105220347A.

However, the problem that the existing flat knitting machine cannot knit the foregoing mentioned fabric results from the flat knitting machine comprising fixed knock-over bits to define a gap therebetween, which is causing that the flat knitting machine can only knit the fabric with a single thickness.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to solve an applied problem derived from a constant gap of the flat knitting machine.

To achieve the above purpose, the present invention provides a flat knitting machine structure with a gap to be adjustable, including two needle beds and two cam systems which are respectively disposed to face one of the needle beds. Each of the needle beds comprises a plurality of needles and a plurality of knock-over bits which are respectively disposed to correspond to each of the plurality of needles. Each of the plurality of needles comprises a butt. Each of the plurality of knock-over bits comprises a control butt disposed at a same side as each of the butts. The two needle beds are disposed at interval so that the plurality of knock-over bits face each other to define a gap, wherein the distance of the gap is equal to a space between two knock-over bits facing each other. Each of the plurality of needles defines a needle extending line. Each of the butts is respectively positioned on one of the needle extending lines. Each of the control butts is respectively positioned on one of needle extending lines in which one of the plurality of needles is correspondingly disposed. Each of the plurality of knock-over bits comprises an extending section provided with the control butt, a bending section connected with the extending section, and a loop hanging section connected with the bending section as well as paralleled to a front edge of one of the needles. Each of the cam systems comprises a needle cam to provide the butts being placed and guide each of the plurality of needles to make a knitting stroke towards the gap, and a knock-over bit cam provides the control butts being placed. The knock-over bit cam is controlled to define a displacement stroke for driving the plurality of knock-over bits to change the size of the gap.

In an embodiment, each of the plurality of knock-over bits comprises a wire mounting hole for loosening loop located on the loop hanging section, and at least one wire mounting hole for limiting position located on the extending section.

In an embodiment, each of the needle beds comprises a plurality of chutes respectively disposed on a needle bed base; and each of the plurality of knock-over bits comprises a bottom positioned at the loop hanging section for the knock-over bit cam sliding in the chute under the displacement stroke.

In an embodiment, each of the knock-over bit cams comprises a first guide section, a straight section connected with the first guide section, and a second guide section connected with the straight section, the first guide section and the second guide section are respectively tapered towards the straight section; and the size of the straight section is constant.

In an embodiment, each of the knock-over bit cams is respectively disposed at one side of one of the cam systems where faces the gap.

As previously disclosed in the present invention, compared with the prior art, the present invention has the following characteristics: the cam systems in the flat knitting machine structure of the present invention include the knock-over bit cams to move the knock-over bit according to knitting needs so that the gap of the flat knitting machine structure is adjustable to knit a three-dimensional fabric with different thicknesses.

