JPS59125949A - Yarn feeder in sock knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn feeding device for a circular knitting machine such as a sock knitting machine, and an object thereof is to alternately convert and feed a large number of pattern yarns at high speed.

When knitting a jacquard pattern using a circular knitting machine, the yarn for knitting the pattern is placed outside the cylinder of the knitting machine, and the yarn feeder at the tip of the yarn feeding member is placed on the hook of the needle inserted into the cylinder. A yarn feeding member is provided so as to be able to swing freely on the outside of the cylinder so that the yarn can be moved toward and away from the cylinder. It is preferable that the yarn feeder stay close to the hook of the needle for as long as possible when the yarn feeder swings. However, in order to do so, it is necessary to increase the length between the swinging shaft of the yarn feeding system and the yarn feeding port. However, in this case, the weight of the yarn feeding member or the inertia during turning becomes large, making it difficult to switch the yarn feeding port within a very short period of time, and the yarn feeding member cannot be adapted to high-speed pattern knitting. Further, depending on the rise of the needle, a situation may occur in which the yarn in a dormant state becomes stuck to the needle.

The present invention has been made in view of the above-mentioned drawbacks, and an example of its implementation will now be described with reference to the drawings.

1 is a cylinder, and needles 3 are inserted into needle grooves 2 cut at equal pitches on the outer periphery. At the top of cylinder 1,
A bracket 4 is provided by appropriate means, and a plurality of yarn feeding members 6 are swingably supported on the bracket 4 by means of a support shaft 5. The yarn feeding member 6 has a roughly U-shape with a bent central portion, and a yarn feeding hole 7 is provided at the tip thereof, and a concave portion 8 is provided in the bent portion near the support shaft 5. In this embodiment, the yarn feeding member 6 is 1
Two of them are supported by a support shaft 5.

A solenoid mounting board 9 is fixed to the bracket 4, and the solenoid mounting board 9 is provided with 12 solenoids 10, each with 3 sets, and 4 sets at 4 locations.

Further, a swinging arm 11 is supported by a shaft 12 on the bracket 4, one end of the swinging arm 11 is connected to the solenoid 1o by a connecting rod 13, and the other end of the swinging arm 11 is connected to the yarn feeding member 6. It is fitted into the concave portion 8, and the yarn feeding member 6 is swung by the operation of the solenoid 10. The swing arm 11 has four different shapes depending on the positions of the four solenoids. A spring 14 urges the yarn feeding member 6 to rotate clockwise in the drawing. The yarn feeding member 6 turned clockwise is stopped at the stopper 15, and the yarn feeding member 6 turned counterclockwise is stopped at the stopper 16. When the yarn feeding member 6 rotates clockwise, the yarn feeding hole 7 at the tip thereof is located in front of the hook 17 of the needle 3, and yarn can be fed to the needle 3. 18 is a yarn feeding member box.

Next, the operation of the device of the present invention will be explained.

The state shown in FIG.
Although both B and 10C910D are in the yarn feeding state, generally only one of them, the yarn feeding member 6, takes the position shown in FIG. That is, the solenoid that has not received a yarn feeding command is in an inoperative state, and the yarn feeding member 6 is rotated to the left by the elastic force of the spring 140, and the connecting rod 13 is in a state of protruding through the swinging arm 11. In this state, the yarn feeding hole 7 is rising along the locus of the dashed line 20. In this state, a yarn feeding command is issued to solenoid 10A, and solenoid 10
When A is activated and the connecting rod 13 is retracted, the swinging arm 11 turns counterclockwise and its tip engages the concave portion 8 of the yarn supplying member 6. It turns clockwise against the elastic force of the spring 14, and moves the yarn feeding hole 7 to the front of the hook 17 of the knitting needle 3 along the locus shown by the dashed line 20. At this time, since the knitting needles 3 are at a position slightly lower than the clearing position, there is no contact between the yarn feeding member 6 and the needles. The trajectory of the yarn feeding hole 7 is an elliptical arc with the radius being the line connecting the yarn feeding hole 7 and the center of the fulcrum 5. However, when the yarn feeding hole 7 is raised to the rest position, the fulcrum 5 is Since it is provided inside, the yarn feeding hole 7 is located above the knitting needles 30 and above the inside of the cylinder 1. For this reason, the knitting yarn extending from the yarn feed hole in the dormant state to the knitted fabric will be connected to the needle at the pattern end of the knitted fabric through the yarn feed hole in the annular row of knitting needles, and the knitting yarn will be connected to the needle at the pattern end of the knitted fabric through the yarn feed hole in the circular row of knitting needles. This eliminates the possibility of the knitting yarn being erroneously caught.

As described above, the device of the present invention uses a rotating support shaft provided in a cylinder formed by inserting a needle into a needle groove on the circumferential surface.
Since the yarn feeding member has a yarn feeding hole at the tip and the intermediate portion is bent so that the intermediate portion straddles the needle and the yarn feeding hole faces the front surface of the needle hook, the turning radius of the yarn feeding member is small. However, when feeding the yarn, it can move long along the front of the hook of the knitting needle to be fed, and the yarn can be accurately fed to the hook of the target knitting needle. The yarn feeding operation time can be extremely shortened, and the knitting speed can be increased.

Furthermore, since the yarn feeding member is located inside the cylinder, the knitting machine can be made compact.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view, and FIG. 2 is a plan view. 1... Cylinder 2... Needle groove 3... Needle 5... Rotating support shaft 6... Yarn feeding member 7.
... Yarn feeding hole 17 ... Needle hook patent applicant
Yuzo Mitsuishi Toshiki Ishi Agent Patent Attorney Katsu Ohno Masaru Ohno
Reiko Ohno Yanosuke

Claims (1)

[Claims] A rotating support shaft provided in a cylinder with a needle inserted into a needle groove on the peripheral surface has a thread feeding hole at the tip, and the middle part straddles the needle so that the thread feeding hole faces the front surface of the needle hook. A yarn feeding device for a sock knitting machine that supports a yarn feeding member having a bent portion.