KR101941122B1 - Needle for knitting machine and circular knitting machine having the same - Google Patents

Abstract

The present invention relates to a needle for a knitting machine which can manufacture high quality of a knitted product by arranging a nonelastic thread and an elastic thread, and uniformly weaving the same to make an order not be reversed. The present invention also relates to a circular knitting machine having the same. A needle for a knitting machine according to the present invention comprises: a needle body which has a butt protruding from one side; a sank which is extended from the needle body; a needle neck which is extended from the sank in the width reduced than that of the sank; a hinge unit which is connected to the needle neck; a hook which has a hook groove into which the elastic thread and the nonelastic thread can be inserted, and is connected to the hinge unit to make the elastic thread and the nonelastic thread hooked; a latch which is rotatably combined to the hinge unit to be in contact with the hook to close a hook groove; and a protrusion which is arranged between the sank and the needle neck. When the needle neck with the elastic thread and the nonelastic thread located is raised, the protrusion is brought into contact with the elastic thread with frictional force, greater than that of the nonelastic thread, and then the nonelastic thread is passed to the sank while the elastic thread is hooked not to be moved to the sank.

Description

TECHNICAL FIELD [0001] The present invention relates to a knitting needle and a knitting machine having the knitting needle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knitting needle, and more particularly, to a knitting needle used in a knitting machine for knitting and a knitting machine having the knitting needle.

A knitting machine is a type of textile machine which produces a loop by making loops of one yarn or a plurality of yarns which are supplied continuously by using needles respectively and connecting loops to each other to produce a knitted fabric. Such a knitting machine has a warp knitting machine knitting the warp in the longitudinal direction and an weft knitting machine knitting the weft in the lateral direction.

The top piece is a knitting machine that creates a loom in a horizontal direction by connecting one yarn in a horizontal direction and connecting it up and down one by one, and there are a circular knitting machine and a horizontal machine. The warp knitting machine is supplied with warp yarns in the longitudinal direction to make a knitted fabric, and there are a krico knitting machine, a rachel knitting machine, a mirror knitting machine, and a special knitting machine.

Among them, the circular knitting machine is arranged circularly on the cylinder so that the circular knitted fabric can be continuously produced. An annular knitted fabric knitted by a circular knitting machine is usually finished in clothes through a cutting process. The circular knitting machine is the most productivity and economical knitting machine among various knitting machines, and it is a high productivity knitting machine having a productivity of more than 100yds per hour. The circular knitting machine can be divided into single and double depending on the number of needles. A circular knitting machine in which two needles are arranged so as to be perpendicular to each other to knit is called a double circular knitting machine and a knitting machine in which one needle is arranged to move up and down is called a single circular knitting machine.

Typically, the circular knitting machine includes a feeding portion, a knitting portion, and a winding portion. The yarn feeder is a part that supplies yarn necessary for knitting to a needle which performs a knitting exercise at a proper tension and speed. The knitting portion is a portion in direct contact with the yarn in order to allow the yarn to be knitted while forming a loop, and is composed of a needle, a cam and the like. The winding portion refers to the portion where the knitted fabric is wound.

As the circular knitting machine, various knitted fabrics such as a double knitted fabric or a triple knitted fabric can be manufactured. However, when a knitted fabric is manufactured using yarns having different elasticity, such as cotton yarn and polyester yarn, the order of the yarns woven by the needles in the knitting process is changed unevenly, .

Especially, the triple knitted fabric is knitted such that a yarn having elasticity such as polyester yarn is arranged between two yarns, and it is expected that the use of the yarn can be further increased because of excellent warmth, cost, and elasticity . However, in spite of these advantages, defects in which elastic yarn escapes out of the knitting process frequently occur frequently.

For example, FIG. 1 is a photograph showing a triple knitted fabric made by knitting three kinds of yarns with a conventional circular knitting machine.

In Fig. 1, it can be seen that the defective portion (black dot portion) produced by reversing the order of the yarns is present over various portions of the triple knitted fabric. Such triple knitted fabrics are difficult to be used as fabrics because of poor dyeing quality and can not lead to high quality products.

Patent Registration No. 1621439 (May 26, 2016)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a method of knitting a knitted fabric by binding an inelastic yarn and an elastic yarn together, Which is capable of producing a knitted fabric of high quality by uniformly knitting the knitted fabric, and a knitting machine having the knitting needle.

To achieve the above object, the present invention provides a knitting needle for knitting a knitted fabric by knitting an elastic yarn and an inelastic yarn while vertically moving an elastic yarn and an inelastic yarn together, 1. A needle comprising: a needle body having a butt protruding on one side; A shank extending from the needle body; A needle neck extending from the shank at a reduced width than the width of the shank; A hinge connected to the needle neck; A hook having a hook groove into which the elastic yarn and the non-elastic yarn can be inserted and connected to the hinge so that the elastic yarn and the non-elastic yarn can be hooked; A latch rotatably coupled to the hinge so as to close the hook groove in contact with the hook; And when the needle neck is lifted in a state where the elastic yarn and the non-elastic yarn are positioned, the non-elastic yarn contacts the elastic yarn with a large frictional force to pass the inelastic yarn to the shank side, And a locking jaw which is disposed between the shank and the needle neck so as not to move to the shank side.

The needle neck may be provided with a curved curved guide portion connected to the engaging jaw so as to guide the elastic yarn and the non-elastic yarn to the engaging jaw.

The needle neck may be provided with a straight linear guide connected to the engaging jaw so as to guide the elastic yarn and the non-elastic yarn to the engaging jaw.

The width (Ws) of the shank preferably satisfies the following conditions.

1.2Wn? Ws? 3.6Wn (Wn is the minimum width of the needle neck)

The distance (D) from the upper end of the hook to the latching jaw preferably satisfies the following condition.

D <L (L is the vertical travel distance of the needle for the weaving machine)

It is preferable that the distance D from the upper end of the hook to the engagement jaw satisfies the following condition.

0.6L? D? 0.9L

It is preferable that the distance D from the upper end of the hook to the engagement jaw satisfies the following condition.

9mm? D? 16mm

According to another aspect of the present invention, there is provided a circular knitting machine for knitting a knitted fabric, comprising: a cam portion having a plurality of cams having guide grooves arranged in a cylindrical shape; A plurality of first yarn feeder parts for feeding the inelastic first yarn and a plurality of second yarn feeder parts for feeding the elastic second yarn part alternately arranged along the circumferential direction; A shank extending from the needle body; a needle neck extending from the shank at a width smaller than the width of the shank; and a hinge connected to the needle neck, A hook having a hook groove into which the first yarn and the second yarn can be inserted and connected to the hinge so that the first yarn and the second yarn can be hooked; And a latching jaw disposed between the shank and the needle neck, and knitting the knitted fabric while moving in a circumferential direction and a vertical direction along the guide groove of the cam portion And a plurality of needles, wherein the needles, when the needle yarn is lifted up with the first yarn and the second yarn being positioned on the needle neck, The second yarn is prevented from being moved to the shank by the engagement of the second yarn with the second yarn by a greater frictional force than the first yarn, and the first yarn passes through the engagement jaw and moves to the shank, The first yarn and the second yarn are aligned such that the second yarn is positioned above the first yarn.

Wherein the yarn feeding portion is configured such that a plurality of third yarn feeders for feeding a third yarn are alternately disposed in the circumferential direction together with the plurality of first yarn supplying yarn portions and the second yarn supplying yarn portion, The first yarn, the second yarn and the third yarn may be knitted to knit the triple knitted fabric so that the second yarn is positioned between the three yarns.

The knitting machine according to the present invention can knit the knitted fabric while the needle is moved up and down in a state in which the yarn of non-elasticity and the elastic yarn are engaged together. The needles can align the elastic yarn with the inelastic yarn located on the needle neck when the needle neck is raised with the yarn of non-elastic yarn and the elastic yarn together. That is, when the needle is lifted, the inelastic yarn moves along the needle neck and moves to the shank over the jaw, and the elastic yarn moves relative to the needle neck in contact with the needle neck with a large frictional force, So that the second yarn can not move to the shank side and is aligned such that the second yarn is relatively positioned above the first yarn.

Conventionally, the order of the inelastic yarn and the elastic yarn is changed irregularly so that the yarn of elasticity is frequently exposed on the inelastic yarn. On the other hand, in the knitting machine according to the present invention, the yarn of the elastic yarn is relatively higher The inelastic yarn and the elastic yarn are knitted together in a state in which the elastic yarn is aligned to be positioned on the inelastic yarn. Therefore, a high-quality knitted fabric free from defects can be knitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph showing a triple woven fabric knitted by a conventional circular knitting machine.
2 schematically shows a circular knitting machine according to an embodiment of the present invention.
FIG. 3 schematically shows a part of a knitting section included in a circular knitting machine according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a procedure for supplying yarns to a knitting portion of a circular knitting machine according to an embodiment of the present invention.
5 and 6 illustrate a portion of a needle included in a circular knitting machine according to an embodiment of the present invention.
7 is a view for explaining a process of moving a needle included in a circular knitting machine along a guide groove of a cam according to an embodiment of the present invention.
8 and 9 illustrate a method of aligning yarns with needles of a circular knitting machine according to an embodiment of the present invention.
10 to 14 illustrate a process of knitting a triple knitted fabric with needles of a circular knitting machine according to an embodiment of the present invention.
15 is a schematic view illustrating a knitting structure of a triple knitted fabric knitted with a circular knitting machine according to an embodiment of the present invention.
16 is a photograph showing one side of a knitted fabric knitted with a circular knitting machine according to an embodiment of the present invention.
17 shows a modified example of the needle.

Hereinafter, a knitting needle and a knitting machine having the knitting needle according to the present invention will be described in detail with reference to the drawings.

FIG. 2 is a schematic view of a circular knitting machine according to an embodiment of the present invention, FIG. 3 is a schematic view of a part of a knitting part included in a circular knitting machine according to an embodiment of the present invention, FIG. The order of supplying the yarn to the knitting portion of the circular knitting machine according to the example is shown.

As shown in the drawing, the circular knitting machine 100 according to an embodiment of the present invention includes a yarn feeding part 110 for supplying a plurality of yarns 10, 20, and 30 necessary for knitting in a uniform tension and a uniform speed, A knitting section 120 for knitting the yarns 10, 20 and 30 supplied from the yarn supplying section 110 and a winding section 160 for winding the knitted fabric by the knitting section 120 . The knitting portion 120 includes a cam portion 121 arranged in a cylindrical shape and a plurality of needles 140 141 141 which are moved in the circumferential direction and up and down direction by the cam portion 121 and a sinker do.

In this embodiment, the circular knitting machine 100 will be described by way of example for knitting a triple knitted fabric 40 by using three types of yarns 10, 20 and 30. FIG. Here, the three kinds of yarns 10, 20 and 30 are the inelastic first yarn 10 and the third yarn 30 and the elastic second yarn 20. The first yarn 10 and the third yarn 30 may be made of a material having little elastic force such as a surface and the second yarn 20 may be made of a material having elasticity like polyester.

The yarn feeding unit 110 includes a first yarn supplying unit 111 for supplying the first yarn 10, a second yarn supplying unit 112 for supplying the second yarn 20, And a third yarn feeder 113 for feeding yarn. A plurality of first yarn supplying portion 111, second yarn supplying portion 112 and third yarn supplying portion 113 are alternately arranged in the circumferential direction. 4, the plurality of yarn supplying units 111, 112, and 113 may include a first yarn supplying unit 111, a second yarn supplying unit 112, a third yarn supplying unit 112, The first yarn 10, the second yarn 20 and the third yarn 30 are arranged alternately in the order of the yarn supplying section 113, the first yarn supplying section 111, 140, respectively.

The cam 121 has a plurality of cams 125 arranged in a cylindrical shape. The plurality of cams 125 have guide grooves 127a for guiding the needles 140, 141, and 142 to move in the circumferential direction and the vertical direction, respectively. As shown in FIG. 3, the cam 125 of the cam 121 is connected to the upper and lower sides of several different shapes to form a unitary cam unit 123 having a guide groove 127 of a uniform pattern. A plurality of such unit cam units 123 are sequentially arranged along the circumferential direction to form a cylindrical cam 121. 7, the guide groove 127 of the cam portion 121 has a first upper dead portion 128, a first lower dead portion 129, a second upper dead portion 130, a second lower dead portion 131, a third upper dead portion 132, and a third lower dead portion 133.

The cam portion 121 can take a structure capable of increasing the upward and downward moving distance L of the needles 140, 141, and 142 from the conventional cam portion provided in a conventional circular knitting machine. The first yarn 10 and the second yarn 20 caught by the needles 140, 141 and 142 move relative to each other through the upward movement distance L of the needles 140, 141, It is possible to secure a sufficient alignment distance.

Although the figure shows that a plurality of guide grooves 127 having a somewhat different shape of the unit cam unit 123 are arranged in the vertical direction, the number or shape of the guide grooves 127 provided in the unit cam unit 123 is And can be variously changed. In addition, the shape and the number of the cams 125 constituting the unit cam unit 123 can be variously changed.

The plurality of needles 140, 141 and 142 can move in the circumferential direction and up and down direction along the guide groove 127 of the cam 121 to knit the triple weft knitted fabric 40. The plurality of needles 140, 141 and 142 are disposed in a cylinder (not shown) rotatably disposed inside the cam portion 121 and guide the guide groove 127 of the cam portion 121 Thereby moving in the circumferential direction and up and down direction.

3 and 4, the needles 140, 141 and 142 may be arranged in order along the circumferential direction so as to move along a plurality of guide grooves 127 arranged in the vertical direction. have. These needles 140, 141, and 142 have the same basic structure, although the positions of some of the components are slightly different. Hereinafter, one needle 140 will be described and a detailed description of the remaining needles 141 and 142 will be omitted.

3 to 7, the needle 140 includes a needle body 143 having a butt 144 protruded on one side, a shank 146 extending from the needle body 143, A needle neck 148 extending from the shank 146 at a width smaller than the width of the knitted fabric 148 and a hinge 151 connected to the needle neck 148 and a hinge 151 connected to the yarn 10, A latch 155 rotatably coupled to the hinge 151 and a latching jaw 157 disposed between the shank 146 and the needle neck 148. [ . A hook groove 154 into which the yarns 10, 20 and 30 can be inserted is provided inside the hook 153. The needle 140 is inserted into the guide groove 127 of the cam portion 121 and moves along the guide groove 127 to move vertically along the inner surface of the cam portion 121 in the circumferential direction Can be moved.

The latch 155 may be supported on the hinge 151 and rotated so that it contacts the hook 153 or is spaced from the hook 153. As shown in Fig. 5, the latch 155 can close the hook groove 154 by abutting on the hook 153. Fig. The yarns 10,20 and 30 located on the needle neck 148 when the needle 140 is lifted with the hook groove 154 closed by the latch 155 are hooked along the latch 155 153) without passing through the hooks (153). 6, the latch 155 can be spaced apart from the hook 153 to open the hook groove 154. As shown in Fig. At this time, the yarns 10, 20, and 30 may be inserted into the hook groove 154 and hooked on the hook 153.

The needle neck 148 is provided with a curved guide portion 149 having a curved shape. The curved guide portion 149 serves to guide the first yarn 10 and the second yarn 20 to the engaging jaws 157. When the needle 140 is lifted up with the first yarn 10 and the second yarn 20 positioned on the needle neck 148, the first yarn 10 and the second yarn 20 are guided by the curved guide portion 149 To the engaging jaw 157 smoothly. The hooking jaw 157 is a portion where the shank 146 and the curved guide portion 149 meet and the elastic yarn 20 is caught by the hooking jaw 157 when the needle 140 is lifted.

These needles 140 can align the order of the inelastic first yarn 10 and the elastic second yarn 20 by the action of the needle neck 148 and the engagement step 157. 8 and 9, when the needle 140 is lifted while the first yarn 10 and the second yarn 20 are positioned on the needle neck 148, the elastic second yarn The first yarn 10 is prevented from moving to the shank and the first yarn 10 is moved to the shank 146 through the engaging step 157 so that the second yarn 20 is wound on the first yarn 20, The first yarn 10 and the second yarn 20 may be aligned so as to be positioned above the first yarn 10.

Specifically, the movement of the first yarn 10 and the second yarn 20 located on the needle neck 148 when the needle 140 is lifted will be described in detail. When the second yarn 20 having elasticity is wound on the first yarn 10 having no elasticity, Relative to the curved guide portion 149 and the engaging shoulder 157 of the needle neck 148, by a large frictional force. The first yarn 10 in contact with the curved guide portion 149 and the engaging jaws 157 moves to the shank 146 beyond the engaging jaws 157 with a relatively small frictional force when the needle 140 rises The second yarn 20 of elasticity does not exceed the engaging jaw 157 and is caught by the engaging jaws 157 and is unable to move toward the shank 146 side. The elastic yarn 20 relatively moves toward the engaging jaw 157 while being in contact with the needle neck 148 with a relatively large frictional force due to the elastic force of the elastic yarn 20 when the needle 140 is lifted, So that it can not pass over the latching jaws 157.

8, when the needle 140 is lifted up with the second yarn 20 relatively positioned on the upper side and the first yarn 10 relatively positioned on the lower side of the needle neck 148, The yarn 10 moves to the shank 146 beyond the engagement jaws 157 and the second yarn 20 is caught by the engagement jaws 157. [ The needle 140 is pulled up above the first yarn 10 in a state in which the second yarn 20 is caught by the engaging jaws 157 so that the second yarn 20 is positioned above the first yarn 10 And may be arranged so as to be positioned relatively to the upper side.

9, even when the first yarn 10 is relatively positioned on the upper side of the needle neck 148 and the second yarn 20 is located on the relatively lower side, when the needle 140 rises, The first yarn 10 moves to the shank 146 beyond the engaging jaws 157 and the second yarn 20 is caught by the engaging jaws 157. The needle 140 is pulled up above the first yarn 10 in a state in which the second yarn 20 is caught by the engaging jaws 157 so that the second yarn 20 is positioned above the first yarn 10 And may be arranged so as to be positioned relatively to the upper side.

Even when the positions of the first yarn 10 and the second yarn 20 are irregularly positioned on the needle neck 148 as described above, when the needle 140 rises, the first yarn 10 and the second yarn 20 May be aligned such that the second yarns 20 are relatively positioned on the upper side.

In the course of knitting the triple weft knitted fabric 40 by using the first yarn 10, the second yarn 20 and the third yarn 30, the first yarn 10 and the second yarn 20, As shown in Fig. 1, the defects that the second yarn 20 is exposed outside the first yarn 10 frequently occur. In contrast, in the circular knitting machine 100 according to the present invention, the second yarn 20 is relatively positioned on the upper side of the first yarn 10 by the needle neck 148 and the engagement jaws 157 of the needle 140 The second yarn 20 is prevented from being exposed to the outside of the first yarn 10 because the yarn is woven over the hook 153 in an aligned state.

The needle 140 has several structural features such that the needle 140 can smoothly align the inelastic first yarn 10 and the elastic second yarn 20.

5 and 7, the distance D from the upper end of the hook 153 to the engaging protrusion 157 of the needle 140 should be smaller than the up-and-down moving distance L (D <L). When the distance D from the upper end of the hook 153 to the engaging jaw 157 is equal to or larger than the up-and-down moving distance L of the needle 140, the first yarn 10 passes over the engaging jaw 157, Or the second yarn 20 can not be caught by the engaging jaws 157 so that the first yarn 10 and the second yarn 20 can not be aligned with each other.

More specifically, it is preferable that the distance D from the upper end of the hook 153 to the latching jaw 157 and the vertical moving distance L of the needle 140 satisfy the following condition.

0.6L? D? 0.9L

If the distance D from the upper end of the hook 153 to the engaging jaw 157 exceeds 0.9L, the first yarn 10 can not move beyond the engaging jaw 157 and move to the shank 146 There is a risk that the first yarn 10 and the second yarn 20 can not be aligned with each other because the second yarn 20 is not caught by the catching jaws 157.

On the other hand, if the distance D from the upper end of the hook 153 to the engaging jaw 157 is less than 0.6L, the distance of movement of the elastic second yarn 20 in the engaged state with the engaging jaw 157 increases There is a risk that the second yarn 20 moves beyond the engaging jaw 157 to the shank 146. Even in this case, the first yarn 10 and the second yarn 20 can not be aligned with each other.

More specifically, it is preferable that the distance D from the upper end of the hook 153 to the latching jaw 157 satisfies the following condition.

9mm? D? 16mm

When the distance D from the upper end of the hook 153 to the engaging jaws 157 is in the range of 9 mm to 16 mm since the vertical moving distance L of the needle 140 is designed to be similar to that of the knitting machine, The first yarn 10 and the second yarn 20 can be smoothly aligned.

That is, when the distance D from the upper end of the hook 153 to the engaging jaw 157 exceeds 16 mm, the first yarn 10 can not move to the shank 146 because it does not exceed the engaging jaw 157 Or the second yarn 20 may not be caught by the catching jaws 157 and the first yarn 10 and the second yarn 20 may not be aligned with each other.

When the distance D from the upper end of the hook 153 to the engagement protrusion 157 is less than 9 mm, the distance of movement of the elastic second yarn 20 in the engagement state of the engagement protrusion 157 increases, There is a risk that the two yarns 20 move beyond the engaging jaws 157 to the shank 146 and the first yarn 10 and the second yarn 20 can not be aligned.

The vertical moving distance L of the needle 140 may be increased by changing the structure of the cam portion 121 in order to smoothly align the first yarn 10 and the second yarn 20. [ That is to say, by increasing the vertical moving distance L of the needle 140 and increasing the distance D from the upper end of the hook 153 to the engaging protrusion 157, the first yarn 10, And the second yarn 20 can be aligned and moved relative to each other.

It is also preferable that the needle 140 has a width Ws of the shank 146 that has a certain range of size relative to the minimum width Wn of the needle neck 148. [ Specifically, it is preferable that the width Ws of the shank 146 and the minimum width Wn of the needle neck 148 satisfy the following conditions.

1.2Wn? Ws? 3.6Wn

If the width Ws of the shank 146 is less than 1.2 Wn, there is a risk that the elastic second yarn 20 can not smoothly engage with the engaging jaw 157 and move to the shank 146 beyond the engaging jaw 157 . In this case, the first yarn 10 and the second yarn 20 are not aligned.

When the width Ws of the shank 146 exceeds 3.6 Wn, the width Ws of the shank 146 is excessively large or the width Ws of the normal shank 146 is larger than that of a conventional knitting needle, The minimum width Wn of the needle neck 148 is excessively small. If the width Ws of the shank 146 is excessively large as compared with a conventional knitting needle, there is a risk that the yarn is broken or the first yarn 10 does not exceed the engaging jaw 157 and can not move to the shank 146 have. If the minimum width Wn of the needle neck 148 is excessively small, the strength of the needle neck 148 may deteriorate and the needle neck 148 may be damaged during the knitting process.

Hereinafter, a process of knitting the triple weft knitted fabric 40 with the circular knitting machine 100 according to an embodiment of the present invention will be described.

4, while the yarn supplying section 110 feeds the first yarn 10, the second yarn 20 and the third yarn 30, the needle 140 is inserted into the guide groove (not shown) of the cam section 121 The first yarn 10, the second yarn 20, and the third yarn 30 are engaged with the needle 140 by moving in the circumferential direction and the up and down direction along the guide rails 127. The yarns 10, 20 and 30 stuck to the needles 140 form loops and are interwoven with each other to form a triple weave 40.

10, the butts 144 of the needles 140 are engaged with the first yarns 10 and the second yarns 20 of the guide groove 127 in a state in which the first yarn 10 and the second yarn 20 are engaged with the needle neck 148, The third yarn 30 supplied from the first yarn supplying unit 111 is hooked on the hook 153. [ In this state, when the butt 144 of the needle 140 is moved to the first downslash 129, the needle 140 is lowered with the third yarn 30 hooked on the hook 153.

11, when the butt 144 of the needle 140 moves from the first downward portion 129 to the second superior portion 130, the needle 140 rises to the maximum rising height. The first yarn 10 supplied from the first yarn supplying unit 111 is caught by the hook 153 and the third yarn 30 caught by the hook 153 is caught by the needle neck 148 .

In this process, the first yarn 10 and the second yarn 20 located on the needle neck 148 are aligned. That is, when the needle 140 is lifted, the inelastic first yarn 10 moves along the curved guide portion 149 and moves to the shank 146 over the stopping jaws 157, The yarn 20 is relatively moved in contact with the curved guide portion 149 of the needle neck 148 by a greater frictional force than the first yarn 10 and is caught by the engaging jaws 157 and can not move toward the shank 146 . Thus, the second yarn 20 is arranged so as to be positioned relatively higher than the first yarn 10.

12, the needle 140 is lowered as the butt 144 of the needle 140 moves from the first superior-deflected portion 128 to the second lowered deflected portion 131. As shown in FIG. In this process, the third yarn 30 positioned on the needle neck 148 rotates the latch 155 to close the hook groove 154 of the hook 153 and move over the hook 153 to form a loop . The aligned first yarn 10 and the second yarn 20 are moved in a direction in which they are brought close to the hook 153 in an aligned state.

13, the needle 140 is lifted as the butt 144 of the needle 140 moves from the second lowered portion 131 to the third superior portion 132. As shown in FIG. The second yarn 20 supplied from the second yarn supplying portion 112 is caught by the hook 153 and the looped first yarn 10 of the third yarn 30 is caught by the needle neck 148 . At this time, the first yarn 10 does not leave the hook 153. The first yarn 10 and the second yarn 20 located on the needle neck 148 move in the downward direction on the needle neck 148 in an aligned state.

14, when the butt 144 of the needle 140 moves from the third upper dead portion 132 to the third lower dead portion 133, the needle 140 descends to the maximum falling height. In this process, the first yarn 10 and the second yarn 20 aligned with the needle neck 148 cross the hook 153 along the latch 155 in an aligned state, do. At this time, the first yarn 10 and the second yarn 20, which are sequentially inserted into the hook groove 154 in the previous process, are hooked together with the hook 153.

Thereafter, as the butt 144 of the needle 140 moves from the third downslash 133 to the first upper yarn portion 128, the third yarn 30 is attached to the hook 153 as shown in Fig. 10 The first yarn 10 and the second yarn 20 which are hooked on the hook 153 rotate the latch 155 to open the hook groove 154 and descend to the needle neck 148 side.

As described above, as the needle 140 moves along the guide groove 127, the first yarn 10, the second yarn 20, and the third yarn 30 are knitted together, The triple weft knitted fabric 40 as shown in Fig. 15 is knitted. The knitted triple weft knitted fabric 40 is wound on the winding portion 160. [

As described above, the circular knitting machine 100 according to an embodiment of the present invention is configured such that the needle 140 moves up and down in a state where the inelastic first yarn 10 and the elastic second yarn 20 are engaged together, The knitted fabric 40 can be knitted. The needle 140 is moved in the direction in which the first yarn 10 and the second yarn 20 are juxtaposed to the needle neck 148 so that the first yarn 10 and the second yarn 10 positioned on the needle neck 148, The yarns 20 can be aligned. That is, when the needle 140 is lifted, the inelastic first yarn 10 moves along the curved guide portion 149 and moves to the shank 146 over the stopping jaws 157, The yarn 20 is relatively moved in contact with the curved guide portion 149 of the needle neck 148 by a larger frictional force than the first yarn 10 and is caught by the engaging jaws 157 and can not move toward the shank 146 So that the second yarn 20 is positioned relatively higher than the first yarn 10.

The order of the first yarn 10 and the second yarn 20 is reversed irregularly so that the failure of the second yarn 20 to be exposed to the outside of the first yarn 10 frequently occurs as shown in FIG. The circular knitting machine 100 according to the present invention has a structure in which the needle 140 is arranged in such a manner that the second yarn 20 is relatively positioned on the upper side of the first yarn 10, Since the yarn 20 is knitted, defects that the second yarn 20 is exposed to the outside of the first yarn 10 do not occur. Therefore, as shown in Fig. 16, it is possible to knit a high quality triple knitted fabric 40 having no defects.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to those described and illustrated above.

For example, the specific structure of the needle 140 is not limited to that described above, and can be variously changed. As another example, the needle 170 can take the structure shown in Fig. The needle 170 shown in Fig. 17 includes a needle body 143 having a butt 144 protruded on one side, a shank 146 extending from the needle body 143, A hinge 151 connected to the needle neck 172, a hook 153 connected to the hinge 151 so that the yarn can be caught by the hinge 151, And a latching jaw 157 disposed between the shank 146 and the needle neck 172. The latch 155 has a latch 155 that is rotatably coupled to the base 151, The needle 170 is somewhat modified in structure of the needle neck 172 as compared to the needle 140 described above, and the rest of the configuration is similar to the needle 140 described above.

The needle neck 172 is provided with a straight linear guide portion 173. The linear guide portion 173 serves to guide the first yarn 10 and the second yarn 20 to the engaging jaws 157. When the needle 170 is lifted up with the first yarn 10 and the second yarn 20 placed on the needle neck 172, the first yarn 10 and the second yarn 20 are guided by the straight guide portion 173 To the engaging jaw 157 smoothly. The hooking jaw 157 is a portion where the shank 146 and the linear guide portion 173 meet and the second yarn 20 is caught by the hooking jaw 157 when the needle 140 rises.

Although the circular knitting machine 100 and the needle 140 according to the present invention have been described above as knitting the triple knitted fabric 40, the circular knitting machine 100 and the needle 140 are made of elastic yarn and inelastic It can be used for knitting various knitted fabrics other than the triple knitted fabric 40 while moving the yarn together with the needles 140 to move up and down.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will appreciate that numerous modifications and variations can be made in the present invention without departing from the spirit and scope of the appended claims.

100: circular knitting machine 110:
111, 112, 113: first, second and third yarn supply parts
120: knitting portion 121: cam portion
123: unit cam unit 125: cam
127: Guide groove 128: First top portion
129: first lower portion 130: second upper portion
131: second lower part 132: third upper part
133: third lower portion 140, 141, 142, 170: needle
143: Needle body 144: Burt
146: shank 148, 172: needle neck
149: Curved guide part 151: Hinge part
153: hook 154: hook groove
155: latch 157: latching jaw
160: winding section 173: linear guide section

Claims (15)

1. A knitting needle for knitting a knitted fabric by knitting an elastic yarn and an inelastic yarn while vertically moving an elastic yarn and an inelastic yarn together,
A needle body having a butt protruding from one side;
A shank extending from the needle body;
A needle neck extending from the shank at a reduced width than the width of the shank;
A hinge connected to the needle neck;
A hook having a hook groove into which the elastic yarn and the non-elastic yarn can be inserted and connected to the hinge so that the elastic yarn and the non-elastic yarn can be hooked;
A latch rotatably coupled to the hinge so as to close the hook groove in contact with the hook; And
When the needle neck is raised in a state where the elastic yarn and the non-elastic yarn are positioned, the non-elastic yarn is contacted with the elastic yarn with a large frictional force to pass the inelastic yarn to the shank side, And a hooking jaw which is arranged between the shank and the needle neck so as to be caught without being able to move to the shank side.
The method according to claim 1,
Wherein the needle neck is provided with a curved guide portion connected to the engaging jaw so as to guide the elastic yarn and the non-elastic yarn to the engaging jaw.
The method according to claim 1,
Wherein the needle neck is provided with a straight linear guide portion connected to the hook so that the elastic yarn and the non-elastic yarn can be guided by the hook.
The method according to claim 2 or 3,
Characterized in that the width (Ws) of the shank satisfies the following condition.
1.2Wn? Ws? 3.6Wn
(Wn is the minimum width of the needle neck)
The method according to claim 1,
Wherein a distance (D) from an upper end of the hook to the engagement jaw satisfies the following condition.
D <L
(L is the vertical moving distance of the knitting needles)
6. The method of claim 5,
Wherein a distance (D) from an upper end of the hook to the engagement jaw satisfies the following condition.
0.6L? D? 0.9L
The method according to claim 6,
Wherein a distance (D) from an upper end of the hook to the engagement jaw satisfies the following condition.
9mm? D? 16mm
In a knitting machine for knitting a knitted fabric,
A cam portion in which a plurality of cams having guide grooves are arranged in a cylindrical shape;
A plurality of first yarn feeder parts for feeding the inelastic first yarn and a plurality of second yarn feeder parts for feeding the elastic second yarn part alternately arranged along the circumferential direction; And
A shank extending from the needle body; a needle neck extending from the shank at a width smaller than the width of the shank; a hinge portion connected to the needle neck; A hook having a hook groove into which the first yarn and the second yarn can be inserted and connected to the hinge portion so that the first yarn and the second yarn can be hooked; And a locking jaw provided between the shank and the needle neck, wherein a plurality of knitted fabrics are knitted while moving in a circumferential direction and a vertical direction along guide grooves of the cam portion Needle,
The needle is brought into contact with the second yarn with a large frictional force when the first yarn and the second yarn are raised on the needle neck so that the engaging jaw is in contact with the second yarn more than the first yarn, And the first yarn is moved to the shank through the engagement jaw so that the second yarn is positioned above the first yarn so that the first yarn and the second yarn do not move to the shank, Is arranged at a predetermined position.
9. The method of claim 8,
Wherein the needle neck is provided with a curved curved guide portion connected to the engaging jaw so as to guide the first yarn and the second yarn to the engaging jaw.
9. The method of claim 8,
Wherein the needle neck is provided with a straight linear guide portion connected to the engaging jaw so as to guide the first yarn and the second yarn by the engaging jaw.
11. The method according to claim 9 or 10,
Wherein the needle has a width (Ws) of the shank satisfying the following condition.
1.2Wn? Ws? 3.6Wn
(Wn is the minimum width of the needle neck)
9. The method of claim 8,
Wherein a distance (D) from an upper end of the hook to the engagement jaw satisfies the following condition.
D <L
(L is the vertical moving distance of the knitting needles)
13. The method of claim 12,
Wherein a distance (D) from an upper end of the hook to the engagement jaw satisfies the following condition.
0.6L? D? 0.9L
14. The method of claim 13,
Wherein a distance (D) from an upper end of the hook to the engagement jaw satisfies the following condition.
9mm? D? 16mm
9. The method of claim 8,
Wherein the yarn feeding portion has a plurality of third yarn feeder portions for feeding a third yarn alternately disposed in the circumferential direction together with the plurality of first yarn supplying yarn portions and the second yarn supplying yarn portion,
Wherein the first yarn, the second yarn and the third yarn are knitted by the plurality of needles such that the second yarn is positioned between the first yarn and the third yarn, thereby knitting a triple weft knitted fabric. .

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