TWI604098B - Yarn guide apparatus in circular knitting machine - Google Patents

Description

Yarn guide in circular knitting machine

The present invention relates to a yarn guiding device in a knitting machine, and more particularly to a guiding device for supplying a knitting yarn to a yarn feeding bar of a circular knitting machine.

In the case of knitting a lining cotton knitted fabric by a circular knitting machine, as described in Patent Document 2 to be described later, a double-knit circular knitting machine in which entangled interlacing is used is generally carried out in a knitting process as shown in Fig. 1. The operation line B1 shown in Fig. 1 is an example of an operation line for displaying a syringe needle, and the operation line A1 is an example of an operation line for displaying a dial needle. Although not shown, the knitting yarn is supplied from an upper yarn guide provided on the outer periphery of the circular knitting machine.

This weaving process is carried out in the following manner.

In the first yarn feeder F1, the first yarn Y1 is supplied to the cylinder needle 1 in a knitting/floating state.

Between the first yarn feeder F1 and the second yarn feeder F2, the second yarn Y2 is supplied to the yarn feeder S1 and the yarn feeder D1 by the yarn supplying yarn feeder 7 as a configuration. Cotton mat yarn.

In the second yarn feeder F2, the third yarn Y3 is supplied to the cylinder needle 1 in a knitting/floating state, and the third yarn Y3 is supplied to the dial needle 2 in a knitted state.

In the third yarn feeder F3, the fourth yarn Y4 is supplied to the cylinder needle 1 in a knitting/floating state.

In the fourth yarn feeder F4, the fifth yarn Y5 is supplied to the cylinder needle 1 in a knitting/floating state, and the fifth yarn Y5 is supplied to the dial needle 2 in a knitted state.

The knitted fabric obtained in the weaving process is knitted by the dial needle 2 by the fabric front surface N1 (see Fig. 6) knitted by the cylinder needle 1. The reverse side of the formed fabric N2 (see Fig. 6) and the second yarn Y2 interposed between the fabrics are formed into three layers. When all of the cylinder needles 1 are knitted in the first yarn feeder F1 to the fourth yarn feeder F4 in Fig. 1, the front surface of the fabric is not patterned. However, in order to obtain a creative knit fabric, there is a case where jacquard knitting is performed by these yarn feeders. That is, knitting/floating knitting is selected by the cylinder needles 1 of the first yarn feeder F1 to the fourth yarn feeder F4 in accordance with the desired jacquard pattern.

Fig. 2 specifically shows the yarn feeding bar and the guiding device for supplying the knitting yarn in the first yarn feeder F1 of Fig. 1. That is, in Fig. 2, the yarn feeding bar 13 is supported by the yarn feeder holder 11, and the yarn feeder holder 11 is suspended by the yarn feeder support ring 10. The guiding device for supplying the knitting yarn to the yarn feeding bar 13 of the circular knitting machine, although not shown, is generally a guide attached to the yarn feeding rod itself at a position close to the yarn feeding opening of the yarn feeding bar. The yarn feeder or, as shown in Fig. 2, is a yarn guide 221 that is fixedly attached to the yarn feeder support ring 10.

As shown in Fig. 2 (a) and (b), when the yarn feeding port 131 of the yarn supplying yarn 13 is threaded, the yarn feeding rod 13 is constructed to be self-feeding to a position of about 30 degrees from the yarn feeding position. The upper jump position of the outer side rotates. The shaft portion 17 of the center feeding yarn feeder holder 11 and the spring 18 provided inside the yarn supplying yarn holder 11 press the shaft portion 17 to bias the yarn supplying rod 13 fixed to the shaft portion 17 toward the inside. Further, when the yarn feeding bar 13 is rotated toward the upper jump position, the yarn feeding bar 13 is stopped at this position. (Patent Document 1 to be described later is also known).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Shokai Kaikai 2-118784

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2009-203566

However, in the prior art, between the first yarn feeder F1 and the second yarn feeder F2, between the yarn opening S1 and the yarn opening D1, the yarn constituting the cotton is supplied. When the yarn Y2 is used, the fine fiber of the yarn is expanded, and the yarn is prevented from entering between the yarn opening S1 and the yarn opening D1. The knitting condition at this time is such that the yarn opening S1 and the yarn opening D1 are set to be about 1.5 mm to 2.0 mm, and the yarn is made of 660 dtex or more of the polyester yarn, and the yarn feeding tension of the yarn is weak. Happening. Therefore, it is necessary to set the tension of the mat yarn Y2 to a strength of 30 g or more so that the fine fibers of the mat yarn are not expanded.

Thus, when the yarn feeding tension is set to be strong, when the resistance caused by the tension of the yarn becomes larger than the spring force of the force to the yarn feeding rod 13 toward the inside, the yarn feeding rods 7, 13 will have It does not stop at the usual weaving position and rotates in the upward jump direction. Further, when the yarn feeding port 131 of the yarn supplying yarn 13 is threaded, the yarn feeding rods 7 and 13 are rotated from the yarn feeding position toward the upper jump position of the outside of the finger by about 30 degrees, and the yarn feeding rod 7 is fed. , 13 returns to the yarn feeding position, but due to the strong tension of the yarn, there is a possibility that it cannot be completely returned to the yarn feeding position. Thus, when the yarn feeding tension is too strong at the position of the yarn feeder 221 and the yarn feeding port 71 of the yarn supplying yarn 7, the frictional force is increased, and the knitting yarn which normally flows in the sliding state is subjected to the resistance at this place. As a result, the yarn feeding bars 7, 13 may be unpredictable. In this case, the yarn supplying bars 7, 13 are not in the normal feeding position, so that there may be a case where a knitting scratch or a knitting needle is damaged on the knitted fabric.

When the problem of the prior art is investigated, it is found that the force of the yarn feeding yarns 7 and 13 is turned outward by the frictional force with the knitting yarn at the position of the yarn feeding opening 71 of the yarn feeding yarn 7, and the yarn is guided by the yarn feeding rods 7, 13 to the outside. The position of the yarn guiding hole 231 of the 221 is caused by the action of the frictional force with the knitting yarn to cause the yarn feeding bars 7, 13 to rotate inward.

Therefore, in the present invention, the force for rotating inward at the position of the yarn feeding port 71 of the yarn supplying yarn 7 is set to be larger than the force for rotating outward. That is, the yarn guiding device in the circular knitting machine of the present invention has: a yarn feeding bar support ring 10; a yarn feeding bar holder 11 which is suspended and supported by the yarn feeding bar support ring 10; a yarn stalk 13 having a yarn feeding opening 131 and guiding the first yarn Y1 toward the knitting needle; and a second yarn supplying yarn 7 having a second yarn guide 20 and a yarn feeding port 71 to which the yarn guiding hole 21 is attached, And the second yarn Y2 is guided toward the knitting needle; the yarn feeder holder 11 has a housing 16 that accommodates the first yarn feeding rod 13 as a rotatable shaft 16, and a shaft portion 17 as a center of rotation, and the shaft portion 17 is pressed a spring 18; the yarn guiding device in the circular knitting machine is characterized in that it is disposed at a position substantially equal to a distance from the yarn feeding port 71 to the shaft portion 17 and facing the shaft portion 17 The yarn guiding hole 21 of the second yarn guide 20 is 俾 to the yarn feeding opening 71 of the second yarn feeding rod 7, and the second yarn feeding rod 7 is jumped by the action of the knitting yarn. The force of force (application for patent scope 1).

Preferably, the second yarn guide 20 is attached to the central portion of the shaft portion 17 together with the first yarn feeding rod 13 in a state of surrounding the yarn supplying rod support ring 10 (Patent No. 2 of the patent application) ).

In the present invention, the force (C) acting on the yarn supplying port 71 of the second yarn supplying yarn 7 by the yarn feeding, and the yarn guiding action on the second yarn guiding device 20 by the yarn feeding The relationship between the force (G) of the hole 21 and the force (S) by the spring 18 is C<G and C<S (item 3 of the patent application).

According to the above configuration, it is possible to prevent the yarn feeding bar from being detached from the normal yarn feeding position due to the extremely large tension of the yarn during the operation of the knitting machine, so that the knitting flaw of the knitted fabric or the knitting needle is not damaged.

[Formation of the Invention]

Hereinafter, embodiments of the present invention will be described based on the drawings.

In the third drawing, although not shown, four to six yarn feeder support ring brackets are arranged at equal intervals on the dial seal ring of the double-sided knitting machine, and the front end of the yarn feeder support ring bracket is borrowed. The yarn feeder support ring 10 is fixed by screws.

On the lower side of the yarn feeder support ring 10, the yarn feeder holder 11 is supported by the screw 12. On the yarn feeder holder 11, the first yarn supplying rod 13 for guiding the first yarn Y1 toward the knitting needle is supported by the screw 14. A second yarn supplying yarn 7 for supplying a yarn for the yarn Y2 is attached to the first yarn supplying rod 13 through the mounting member 15.

The yarn feeder holder 11 is a shaft portion 17 that accommodates the first yarn supplying rod 13 so as to be rotatable, a shaft portion 17 as a center of rotation, and a shaft portion that is located on the rear side (mechanical center side) of the shaft portion 17 It is composed of a coil spring 18.

The coil spring 18 is inserted into the screw portion of the screw portion 19, and both sides of the pin are supported by the housing 16.

Both ends of the shaft portion 17 are cylindrical, and both ends thereof are supported by the housing 16. It can be rotated. Further, in order to attach the first yarn supplying rod 13, the central portion of the shaft portion 17 is formed in a planar shape, and the first yarn supplying rod 13 is supported by the screw 14. In the central portion of the shaft portion 17, the yarn guide 20 of the yarn Y2 is attached to the center portion of the shaft portion 17 together with the first yarn supplying rod 13 by the screw 14 in a state of surrounding the yarn supplying rod support ring 10 located above. . A yarn guiding hole 21 for guiding the yarn Y2 is attached to the yarn guide 20.

Further, in order to prevent abrasion due to the knitting yarn, it is preferable to use a ceramic material such as alumina for the yarn guiding hole 21.

The solid line in Fig. 3(b) shows the yarn feeding position (A) of the first yarn supplying rod 13, and the broken line shows the upper jump position (B) after the first yarn supplying rod 13 is rotated upward. At the yarn feeding position, in the event of an accident such as yarn breakage, it is necessary to stop the operation of the knitting machine and re-thread the yarn. At this time, the first yarn feeding rod 13 is picked up by a finger to perform threading. When the first feeding yarn 13 to be picked up is returned to the yarn feeding position (A) again, the pressure of the coil spring 18 is resisted and pressed downward with the finger.

In Fig. 4, reference numeral C denotes a force acting on the yarn supplying port 71 of the second yarn supplying yarn 7 by the yarn feeding, and a symbol G denotes a yarn guiding hole 21 which acts on the yarn feeders 20 and 201 by the yarn feeding, The force of 211, the symbol S indicates the force acting by the coil spring 18, and the symbol J indicates the fulcrum located at the central portion of the shaft portion 17. The knitting yarn Y2 is supplied from an upper yarn guide 301 provided on the outer periphery of the circular knitting machine. Further, the yarn feeding tension of the knitting yarn Y1 acting on the yarn supplying opening 131 of the first yarn supplying yarn 13 is not strong enough to cause an influence, so it is ignored for the sake of convenience.

Fig. 4(a) is a vector diagram showing the force acting on the yarn feeding bar of the conventional example 1. At the place of the yarn feeding port 71 of the second feeding yarn rod, "the needle and the needle are acted upon. The urging force of the woven yarn generates a force (C) for rotating the yarn feeding rod toward the outer side (O), and is further added to the yarn guiding hole 211 of the yarn guide 201 provided near the yarn feeding opening of the yarn feeding rod. The position, the force acting in the same direction (G')" is made larger than the "force (S) acting by the coil spring 18, so that the yarn feeding rod 13 is rotated upward from the feeding position (A) .

Fig. 4(b) is a vector diagram showing the force acting on the yarn feeding bar of the conventional example 2. The force (G") acting on the position of the yarn guide hole 231 of the yarn feeder 221 fixed to the yarn feeder support ring 10 shown in Fig. 2 is displayed, and is fixed to a position that does not affect the yarn feeding rod. (2) The position of the yarn feeding port 71 of the yarn feeding rod is larger than the "force (S) by the coil spring 18", which causes the yarn feeding rod to face outward (by the frictional force with the knitting yarn) O) In the case of the rotational force (C)", the yarn supplying rod 13 is rotated in the upward jump direction from the yarn feeding position (A).

Fig. 4(c) is a vector diagram showing the force acting on the yarn feeding bar of the present invention. The symbol G is a force acting on the yarn guide hole 21 of the second yarn guide 20 fixed to the shaft portion 17 of the yarn feeder holder 11 shown in Fig. 3 . At the position of the yarn feeding port 71 of the second yarn feeding rod, "the force (C) which causes the yarn feeding rod to rotate toward the outer side (O) due to the frictional force with the knitting yarn" is compared with "cause and knitting". The force (G) of the position of the yarn guide hole 21 of the yarn guide that rotates the yarn feeding rod toward the inner side (I) and the force (S) by the coil spring 18 are also generated by the frictional force of the yarn. Small, so the feeding bar can maintain the feeding position (A).

Fig. 5 (a), (b) and (c) correspond to Fig. 4 (a), (b) and (c), respectively, and are displayed at the yarn feeding port of the yarn feeding bar for threading, etc., and the yarn feeding bar is fed from the yarn feeding position. It is in a state of being rotated by the upper jump position of the outside of the left side of the finger by about 30 degrees.

Comparing Fig. 5(a)(b) and Fig. 4(a)(b), it can be seen that the effect of the yarn feeding rod is greater than that at the yarn feeding position (A) because the bending angle of the yarn Y2 is increased. It becomes difficult to return to the yarn feeding position (A). On the other hand, comparing Figures 5(c) and 4(c) of the present case, it can be seen that the feeding yarn rod becomes easier to return to the yarn feeding position than the larger force at the yarn feeding position (A). A).

Further, the second yarn supplying yarn 7 for the yarn yarn is attached to the first yarn supplying rod 13 by the attachment member 15, but may be fixed separately by the yarn feeding rod 13 as in the first yarn feeding rod 13. The device 11 is disposed on the yarn feeder support ring 10.

Further, the yarn feeding port 71 of the second yarn supplying yarn 7 for the yarn is not limited to a circular hole shape, and is preferably formed in a slit shape in which the front surface is opened for easy threading.

The present invention is not limited to the above embodiments, and can be applied to all circular knitting machines for woven cotton woven fabrics.

7‧‧‧2nd yarn feeder for the yarn

10‧‧‧Feed rod support ring

11‧‧‧Feed bar holder

12‧‧‧ screws

13‧‧‧1st feeding rod

14‧‧‧ screws

15‧‧‧Installation components

16‧‧‧Shell

17‧‧‧Axis

18‧‧‧Coil spring

19‧‧ ‧ sales

20, 201‧‧ ‧ yarn guide

21, 211‧‧ ‧ yarn guide holes

C‧‧‧ Force acting on the yarn feeder of the yarn feeder due to yarn feeding

G‧‧‧ Force acting on the yarn guide hole of the yarn guide due to yarn feeding

S‧‧‧The force exerted by the coil spring

J‧‧‧ fulcrum at the central part of the shaft

Fig. 1 is a front view of a weaving process of a conventional cotton lining.

Fig. 2 is a view of a yarn feeding rod and a yarn guiding device according to a conventional example 2, wherein (a) is a front view and (b) is a right side view.

Fig. 3 is a view showing a yarn feeding rod and a yarn guiding device according to an embodiment of the present invention, wherein (a) is a front view and (b) is a right side view.

Fig. 4 is a view showing the force of the yarn feeding bar applied to the yarn feeding position, wherein (a) is a conventional example 1, (b) is a conventional example 2, and (c) is a vector diagram of the present invention.

Fig. 5 is a view showing the force of the yarn feeding rod which is rotated in the upward jump position, (a) is a conventional example 1, and (b) is a conventional vector diagram of the present invention.

Fig. 6 is a view showing the knitting structure of the lining cotton knitted fabric according to the present invention.

7‧‧‧2nd yarn feeder for the yarn

10‧‧‧Feed rod support ring

11‧‧‧Feed bar holder

12‧‧‧ screws

13‧‧‧1st feeding rod

14‧‧‧ screws

15‧‧‧Installation components

16‧‧‧Shell

17‧‧‧Axis

18‧‧‧Coil spring

19‧‧ ‧ sales

20‧‧‧ yarn guide

21‧‧‧Guide hole

71‧‧‧ feeding yarn feeder

131‧‧‧feeding yarn feeder

A‧‧‧ feeding position

B‧‧‧Up jump position

Y1‧‧‧1st yarn

Y2‧‧‧2nd yarn

Claims (6)

A yarn guiding device in a circular knitting machine, comprising: a feeding yarn support ring (10); a feeding yarn holder (11) supported by the feeding rod support ring (10); a yarn feeding rod (13) having a yarn feeding port (131) and guiding the first yarn (Y1) toward the knitting needle; and a second yarn feeding rod (7) having a yarn guiding hole (21) 2 yarn guide (20) and yarn feeding port (71), and guiding the second yarn (Y2) toward the knitting needle; the yarn feeding rod holder (11) has the first yarn feeding rod (13) a rotatable casing (16), a shaft portion (17) as a center of rotation, and a spring (18) for pressing the shaft portion (17); the yarn guiding device in the circular knitting machine is characterized by: The guide yarn of the second yarn guide (20) is disposed at a position where the distance from the yarn feeding port (71) to the shaft portion (17) is substantially equal and facing the shaft portion (17). The hole (21), the yarn feeding port (71) of the second yarn feeding bar (7), has a function of greater than or equal to the force of the first yarn feeding bar (13) jumping by the action of the knitting yarn. force. A yarn guiding device in a circular knitting machine according to claim 1, wherein the second yarn guide (20) surrounds the yarn feeding rod support ring (10) together with the first yarn feeding rod ( 13) Mounted together in the central portion of the shaft portion (17). A yarn guiding device in a circular knitting machine according to claim 1, wherein the force (C) acting on the yarn feeding port (71) of the second yarn supplying yarn (7) due to the yarn feeding is due to the yarn feeding And the yarn guiding hole (21) acting on the second yarn guide (20) The relationship between the force (G) and the force (S) acting on the spring (18) is C<G and C<S. A yarn guiding device in a circular knitting machine according to the second aspect of the patent application, wherein the force (C) acting on the yarn feeding port (71) of the second yarn supplying yarn (7) due to the yarn feeding, the yarn feeding The relationship between the force (G) acting on the yarn guiding hole (21) of the second yarn guide (20) and the force (S) acting on the spring (18) is C<G and C< S. A yarn guiding device in a circular knitting machine according to any one of claims 1 to 4, wherein the second yarn supplying yarn (7) for the second yarn is used by the mounting member (15) The first yarn feeder (13) attached to the yarn feeder support ring (10) through the yarn feeder holder (11) is attached in a branching manner. A yarn guiding device in a circular knitting machine according to any one of claims 1 to 4, wherein the second yarn feeding bar (7) for the second yarn passes through the yarn feeder holder (11) ) mounted directly on the yarn feeder support ring (10).