KR0138536Y1 - Needle selection device of a circular knitting machine - Google Patents

Abstract

The present invention provides a plurality of push jacks 2 which are respectively provided in the needle holes 10 of the needle cylinder 1 of the circular knitting machine, respectively installed in the needle holes 10 and selectively by the push jacks 2. A plurality of lifting bars 3 which are driven to lift each needle 6, and are installed on a cam 4 of a circular knitting machine and moved by the cams from one lifting bar 3 to another lifting bar. An electromagnetic device 5, each lifting bar 3 being balanced in one needle hole 1 with respect to a point at its center and lifting each needle 6. Electromagnetic device between a first position at which the lift bar 3 is not driven by each push jack 2 so that the lift bar 3 is lifted by each push jack 2 and a first position at which the needle 6 is lifted. Provided is a needle selection device which is moved by (5).

Description

Needle picker of circular knitting machine

[Technical Field]

The present invention relates to a needle selection device, and more particularly, to a needle selection device installed in a circular knitting machine and controlled to selectively lift a needle.

[Background]

Many devices are known for selectively lifting needles in circular knitting machines to knit different patterns of knitting.

U.S. Patent No. 4,604,877, entitled Needle Selection Device for Knitting Machines, discloses a pair of side-by-side selector sliders or cams each supported to slide in a horizontal direction between the innermost and outermost non-operating radial positions. Disclosed is a device comprising a stack of. The needle selection device of this structure is such that the operator cannot change the needle selection mode during the knitting operation of the knitting machine.

In U.S. Patent Nos. 4,799,366 and 4,023,383, stationary electromagnetic actuators are provided for applying magnetic force to a wire spring integrated inside a selection sinker inserted into a hole under a needle and a needle pusher. ) Is disclosed. The disadvantage of this needle selection system is that the wire spring wears quickly with use. U.S. Patent Nos. 3,948,065 and 4.793,159 disclose electronic devices for selectively lifting the needles of a wink knitting machine by selectively lifting jacks individually associated with the needles of the cylinder needle holes. However, this electronic device is operated by a complicated lever operating structure.

It is an object of the present invention to provide a needle selection device which solves the above problems.

According to the present invention, a push jack and a lifting bar are respectively installed in a needle hole of a circular knitting machine, and an electromagnetic device controls the needle to move each lifting bar between an operating position and a non-operating position. Selectively lift The electromagnetic device comprises only two electromagnets arranged at different heights to control each lifting bar to be moved between an operating position and a non-operating position.

1 is a front view of an electromagnetic device according to the present invention.

2 is a cross-sectional view taken along the line II-II of the electromagnetic device shown in FIG.

3 is a sectional view taken along line III-III of FIG.

4 is a cross-sectional view taken along line IV-IV of FIG.

Figure 5 corresponds to figure 4 showing the non-operational position of the lifting bar;

6 is a schematic diagram showing the relative positions between the pushjack, the lifting bar, the electromagnetic device, and the cam of the circular knitting machine according to the present invention.

* Explanation of symbols for main parts of the drawings

2: push jack 3: lifting bar

4: cam 5: electromagnetic device

6: needle 10: needle hole

30: point 50: working surface

51,52: Electromagnet

As shown in Figures 3 and 6, the needle selection device according to the present invention, the push jack (2) and the lifting bar (3) provided in each needle hole (10) of the needle cylinder (1) of the circular knitting machine And an electromagnetic device 5 installed in the cam 4 of the knitting machine and moved from one needle hole 10 to another needle hole by the cam 4.

The push jack 2 includes a butt 20 and a nose 21. The butt 20 is disposed between the bottom needle lifting section 40 and the bottom needle pulling section 41 of the cam 4, and the bend of the bottom needle lifting 40 is The needle 6 is moved up along the upper side, or is pushed by the lower needle tension portion 41 to retract the needle 6. The curvature of the groove into which the butt 20 of the push jack 2 is fitted between the lower needle raising portion 40 and the lower needle tension portion 41 of the cam 4 is a pattern of knitted fabric. Designed according to, it serves to lift the needle (6) to the position where the knitting is woven.

On the other hand, when the butt 20 is disposed on the flat surface of the lower needle raised portion 40, the push jack 2 keeps the needle 6 in an idle course. The lifting bar 3 and the push jack 2 are installed in the same needle hole 10, but the lifting bar 3 is disposed between the needle 6 and the push jack 2 so that the lifting force of the push jack 2 ( lifting force) to control the transfer to the needle (6).

The lifting bar 3 is supported inside the needle hole 10 and includes a fulcrum 30 that balances the two opposing ends of the lifting bar 3, namely, the top 31 and the bottom 32. . By changing the position of the lifting bar 3 like a see-saw, the lifting bar 3 is pushed by the push jack 2 to lift the needle 6.

As shown in FIGS. 1 and 2, the electromagnetic device 5 is mounted on the upper needle tension 42 of the cam 4 and is excited to change the position of the lifting bar 3. The electromagnetic device 5 has an operating surface 50 facing outward. As the cam 4 rotates, the electromagnetic device 5 moves along the outer end of each needle hole of the knitting machine. The electromagnets 51 and 52 are installed on the working surface 50 at different heights with respect to the point 30 of the lifting bar 3. The working surface 50 has a plane 53 on one side of the longitudinal center at the same height as the upper needle tension 42 of the cam 4. Electromagnets 51 and 52 have inclined surfaces 510 and 520, respectively. When the plane 53 passes through one of the needle holes 10, the lifting bar 3 in each of the needle holes 10 is supported by the plane 53 and is not shaken with respect to the point 30.

When the electromagnet 51 is excited, the upper part of the lifting bar 3 is attracted to the electromagnet 51, whereby the upper end 31 of the lifting bar 3 is inclined surface 510 as shown in FIG. ), The bottom 32 of the lifting bar 3 is moved outward and pushed by the push jack 2 so that each needle is lifted. On the other hand, when the lower end 32 of the lifting bar 3 is dragged to the inclined surface 520 of the electromagnet 52, the lifting bar 3 moves to the position shown in FIG. 5, and the push jack 2 During its upper stroke (stroke) it is not possible to push the lifting bar 3 upwards, so that each needle 6 is not lifted up.

When the lower needle raising portion 40, the lower needle tensioning portion 41, and the upper needle tensioning portion 42 are arranged vertically, the butt 20 of the push jack 2 is connected to the lower needle raising portion 40. Moving along the curved upper portion, the butt 33 of the lifting bar 3 moves along the horizontal lower portion of the upper needle tension 42 without lifting each needle 6. The inclined surfaces 510 and 520 of the electromagnets 51 and 52 are arranged perpendicularly to the needle lifting start end 400 of the lower needle raising portion 40, so that the butt 33 of the lifting bar 3 is When the lifting bar 3 is lifted by the push jack 2, it is moved along the curved surface of the upper needle tension section 42, and the lifting bar 3 moves to the previous horizontal position after each lifting stroke. Will be.

According to the needle selection device of the circular knitting machine according to the present invention, the electromagnets are arranged up and down around the point of the lifting bar, and the push jack selectively moves the needle through the lifting bar by the seesaw movement of the lifting bar by the electromagnet. By means of being pushed up or pushed up, the needle selection in the circular knitting machine is simple and durable.

Claims (1)

A plurality of push jacks 2 respectively installed in the needle holes 10 of the needle cylinder 1 of the circular knitting machine, respectively installed in the needle holes 10 and selectively driven by the push jacks 2, A plurality of lifting bars 3 for lifting the needle 6, and at least one installed in the cam 4 of the circular knitting machine and moved by the cams to pass from one lifting bar 3 to another lifting bar. An electromagnetic device 5; Each lifting bar 3 is balanced at one needle hole 10 with respect to the point 30 at the center thereof, and the lifting bar 3 is driven by each push jack 2 so that each needle ( 6) the lifting bar 3 is moved between the first position to be lifted and the lifting bar 3 is not driven by each push jack 2 to a second position not to lift each needle 6; Each of the electromagnetic devices 5 comprises one operating surface 50, two electromagnets 51, 52 provided on the operating surface 50 at different heights with respect to the point 30 of the lifting bar 3. The operating surface 50 of the electromagnetic device 5 includes a plane 53 on one side disposed at the same height as the upper needle tension portion 42 of the cam 4 of the circular knitting machine, The electromagnets 51 and 52 have respective inclined surfaces 510 and 520 for pulling the lifting bars 3 in the respective needle holes 10 to the first position or the second position. Device.