TW201829865A - Latch needle including a needle body and a tongue portion and capable of suppressing abrupt changes in frictional resistance - Google Patents

Abstract

The present invention provides a latch needle capable of suppressing abrupt changes in frictional resistance. The latch needle includes: a needle body (11) having a hook-shaped hook portion (14) at a top end; and a tongue portion (20) rotatably mounted to the needle body (11) and capable of contact with and separating from the hook portion (14). Therefore, in a locked state in which the tongue portion (20) abuts the hook portion (14), the stitch of the knitting yarn (S) is detached toward the top edge along the back surface (20a) of the tongue portion (20). The needle main body (11) has a concave shape (11b) on the side opposite to the surface facing the tongue portion (20), that is, the back surface (11a). When the latch needle (10) viewed from the side along the axial direction (A) is in the locked state, the concave shape (11b) is provided at least to an intersected position of the needle body (11) and the back surface (20a) of the tongue portion (20).

Description

Tongue needle

[1]

The present invention relates to a latch needle having a hook portion and a tongue portion at a distal end, and in particular, to a latch needle that does not generate sharp knitting resistance.

[2]

At present, tongue needles are widely used as knitting needles in circular knitting machines and flat knitting machines (for example, refer to Patent Document 1).

Prior art literature

Patent literature [3]

Patent Document 1: Japanese Published Utility Publication No. 61-168188

Problems to be solved by the invention [4]

When a mesh is formed using such a tongue needle, the tip of the tongue needle is pulled out from the stitches of the knitting yarn. Specifically, the knitting yarn is formed in a knock over state where the tongue portion and the hook portion are in contact with each other along the back surface of the tongue portion toward the tip end side of the needle. At this time, if the stitches of the knitted yarn are small, the stitches may press the covering portion between the tongue portion and the hook portion, and the frictional resistance between the tongue needle and the yarn may increase. In addition, rapid changes in frictional resistance cause loads on the yarns and needles and cause damage to the cloth and needles.

Therefore, an object of the present invention is to provide a latch needle capable of suppressing a sudden change in friction resistance.

Solution to Problem [5]

This invention is made in order to solve the said subject, and has the following characteristics.

The invention described in claim 1 is a tongue needle, which includes a needle body having a hook-shaped hook portion at a tip end thereof, and a tongue portion which is rotatably attached to the needle body, and the tongue portion can be connected with the needle body. The hook portion is contacted and separated, and the tongue needle is characterized in that in a locked state where the tongue portion and the hook portion are in contact with each other, the loop of the knitting yarn is separated along the back surface of the tongue portion toward the tip side, The needle body has a concave shape on the side opposite to the surface facing the tongue portion, that is, the back surface. When the narrated needle in the locked state is viewed from the side in the axial direction, the concave shape is at least It is set to the position where the said needle main body and the back surface of the said tongue part cross | intersect. [6]

The invention described in claim 2 is the feature point of the invention described in claim 1, wherein the concave shape is a shape obtained by bending the back surface of the needle body inward. [7]

The invention described in claim 3 is the feature point of the invention described in claim 1 or 2, wherein the concave shape is a chamfered shape formed on a back surface of the needle body. [8]

The invention described in claim 4 is the feature point of the invention described in any one of claims 1 to 3, characterized in that the back surface of the needle body is gradually inclined to the direction in which the tip is tapered to the tip. . [9]

The invention described in claim 5 is the feature point of the invention described in any one of claims 1 to 4 above, and is characterized in that the shortest yarn is to be rolled up around the needle body and the tongue. When the length of the thread is used as the stitch length of the knitting yarn, the stitch length of the knitting yarn is gradually increased as the stitch of the knitting yarn moves along the back surface of the tongue to the tip side until it is detached from the tongue. Increase without decreasing.

Effect of the invention [10]

According to the invention described in claim 1, as described above, the needle body has a concave shape on the side opposite to the surface facing the tongue portion, that is, the back surface. When the latch needle in the locked state is viewed from the side surface in the axial direction, The concave shape is provided at least until the position where the needle body and the back surface of the tongue intersect. With such a structure, it is possible to prevent the frictional resistance from changing abruptly when the loop of the knitting yarn is put on the tongue. That is, in the conventional configuration, when the stitches of the knitted yarn are detached toward the tip side along the back surface of the tongue in the closed state, when the stitches of the knitted yarn are placed on the back surface of the tongue and started to slide, the knitted yarn The coil of the wire is suddenly enlarged, so that the frictional resistance changes sharply. In this regard, according to the present invention, since the concave shape is provided, the loop of the knitting yarn will be gradually expanded even after it is put on the tongue, and it will not be enlarged sharply. The frictional resistance between them is stable, which can weave beautiful fabrics. In addition, since the knitting resistance is small, power consumption of the knitting machine can be suppressed, and breakage of the needle can be suppressed. [11]

In addition, as described in the invention of claim 2, the concave shape is a shape obtained by bending the back surface of the needle body inward. With such a configuration, when the loop of the knitting yarn slides on the back surface of the tongue portion, the shape of the loop does not change greatly, so it is possible to suppress the fluctuation of the frictional resistance. [12]

In addition, as described in the third aspect of the invention, the concave shape is a chamfered shape formed on the back surface of the needle body. With such a structure, it is possible to prevent the loop of the knitting yarn from rapidly expanding, and to prevent the yarn from being worn at the corner portion of the back surface of the needle body. [13]

In addition, as described in the fourth aspect of the invention, as described above, the back surface of the needle body is gradually inclined toward the tapered end until it reaches the top end. With such a structure, the loop of the knitting yarn can be easily detached from the tip of the tongue. [14]

In addition, as described in the invention of claim 5, as described above, the stitch length of the knitted yarn is gradually increased while the stitch of the knitted yarn moves along the back surface of the tongue toward the tip side until it is detached from the tongue. Decrease. With such a structure, the stitch length does not increase or decrease during the process until the stitch is detached from the tip of the pin, so that the stitch length can be increased gently, rapid changes in friction resistance can be suppressed, and knitting yarns can be made. The coil of the needle detaches smoothly from the tip of the needle.

[17]

Examples of the present invention will be described with reference to the drawings:

The tongue needle 10 of this embodiment is used as a needle for knitting, and is used by being mounted on a circular knitting machine or a flat knitting machine. As shown in FIG. 1 and the like, the tongue needle 10 includes a needle main body 11 having a hook at the top end. The hook portion 14 is shaped like a tongue, and the tongue portion 20 is rotatably attached to the needle body 11 and can be brought into contact with and separated from the hook portion 14. The tongue needle 10 knits cloth by opening and closing the tongue portion 20, and through a process of supplying yarn and forming a loop. [18]

Specifically, the tongue needle 10 moves forward and backward along the axial direction A under the action of the knitting machine, and alternately repeats the tongue portion 20 and the hook portion 14 shown in FIG. 1 (b) in conjunction with the forward and backward movement. The abutted locked state and the opened state in which the tongue portion 20 and the hook portion 14 are separated from each other and the hook portion 14 is opened as shown in FIG. 2 (b), the cloth is knitted. [19]

For example, by moving the tongue 10 in the axial direction A under the action of the knitting machine, the hook portion 14 in the open state enters the loop of the knitting yarn S, and the hook of the tongue 10 is used on the opposite side of the loop. The portion 14 hooks the yarn. Thereafter, by moving the tongue needle 10 in the retreating direction, when the hook portion 14 is disengaged from the loop, the tongue portion 20 is closed and locked by the loop, and the loop of the knitting yarn S is along the back of the tongue portion 20 20a is detached toward the tip side. Through this series of operations, the yarn can be passed through the loop to form a mesh. In addition, when the tongue needle 10 is moved in the entering direction again, the tongue portion 20 is opened by the tension of the yarn hooked by the hook portion 14 to be opened. The tongue 10 in the open state is separated from the hooked yarn and enters the next loop. [20]

The needle main body 11 of this embodiment includes a needle bar 13 that is rod-shaped; a cheek portion 15 that is provided on the tip side of the needle bar 13 to support the tongue portion 20; and a connecting portion 16 that is provided on the cheek portion 15 And the hook portion 14. The cheek portion 15 is provided with a rotation shaft 25 that pivotally supports the tongue portion 20 so that the tongue portion 20 can rotate. The rotation shaft 25 can be formed by, for example, a pin, a riveting, or the like. In addition, as shown in FIG. 1 (b) and the like, the connecting portion 16 is formed in a shape having a thinner tip in a side view. In addition, a hook-shaped hook portion 14 bent into a “J” shape is provided at the tip of the connection portion 16. As shown in FIG. 1 (c) and the like, the thickness of the tip end 14 a of the hook portion 14 is thinner than that of the connection portion 16 and the needle bar 13 and can enter the groove portion 20 b (described later) of the tongue portion 20. [twenty one]

In addition, in this embodiment, the portion on the top side of P1 shown in FIG. 1 (c) and the like is the hook portion 14, the portion between P1 and P3 is the connection portion 16, and the portion between P3 and P7 is The part is the cheek part 15 and the part on the rear side than P7 is the needle bar 13. [twenty two]

In addition, in this embodiment, the rear end portion of the tongue portion 20 is rotatably held by the cheek portion 15 of the needle main body 11 so as to be sandwiched from both sides. In addition, a groove portion 20 b having a substantially “V” shape in cross section is provided at a distal end portion of the tongue portion 20. By using the groove portion 20 b to receive the distal end 14 a of the hook portion 14, the tongue portion 20 and the hook portion 14 can be brought into contact Connected locked state. [twenty three]

The back surface 20 a of the tongue portion 20 (the surface on the side opposite to the surface facing the needle body 11) is mainly composed of two inclined surfaces. That is, the rear-end inclined portion 20e is formed on the rotation shaft 25 side and the front-end inclined portion 20d is formed on the front-end side of the rear-end inclined portion 20e. The rear-end inclined portion 20 e is formed as an inclined surface which is steeper than the front-end inclined portion 20 d in the locked state. Further, a gentle mountain portion 20c formed in a curved surface (for example, an R shape) is provided between the rear-end inclined portion 20e and the front-end inclined portion 20d. Therefore, the back surface 20a of the tongue part 20 is formed so that the inclination angle may change on both sides of the mountain part 20c. When the stitches of the knitted yarn S are disengaged along the back surface 20a of the tongue portion 20 toward the tip side in the locked state, the stitches first slide along the rear inclined portion 20e, and then, after passing through the mountain portion 20c, slide along the top inclined portion 20d To the top of the tongue 20. [twenty four]

In addition, the above-mentioned needle main body 11 has a concave shape 11 b on the back surface 11 a which is the side opposite to the surface facing the tongue portion 20. When the latch needle 10 in the locked state is viewed from the side along the axial direction A (see FIG. 1 (b)), the concave shape 11 b is provided at least to a position X where the needle body 11 and the back surface 20 a of the tongue portion 20 intersect. (P5 line). In more detail, the concave shape 11b is provided to include at least the range from the mountain portion 20c of the tongue portion 20 to the crossing position X when the latch needle 10 in the locked state is viewed from the side in the axial direction A (from P4 To P5). [25]

In this embodiment, as shown in FIG. 1 and the like, the concave shape 11 b is a shape obtained by bending the back surface 11 a of the needle body 11 inward. By providing this concave shape 11b, the back surface 11a of the needle main body 11 is formed at a position (range from P4 to P5) corresponding to the rear end inclined portion 20e of the tongue portion 20 so as to move toward the top side. A slightly steeper angle approaches the tongue portion 20 side, and at a position (range from P1 to P4) corresponding to the tip inclined portion 20d of the tongue portion 20, the back surface 11a of the needle body 11 is formed so as to compare with the tongue portion described above. The gentle inclined surface of the position (range from P4 to P5) corresponding to the rear-end inclined portion 20e of 20 is close to the tongue portion 20 side. [26]

In addition, in the conventional structure shown in FIGS. 7 to 9, when the loop of the knitting yarn S passes through the tongue portion 20 in the locked state, a sharpness may occur between the tongue 10 and the knitting yarn S. Frictional resistance. [27]

(A) of FIG. 7 is a loop of the knitting yarn S on a plane perpendicular to the axial direction A of the needle main body 11 with the length of the shortest yarn curled around the needle main body 11 and the tongue 20 Long time (refer to FIG. 7 (c) and the like) is a graph showing the increase and decrease of the coil length. FIG. 9 is a table showing the coil lengths in P1 to P10. As shown in these figures, since the concave shape 11b does not exist in the conventional structure, the coil length increases sharply in the range from P5 to P3. In this manner, a sharp increase in the loop length may cause a sharp frictional resistance between the tongue 10 and the knitting yarn S. In addition, after the coil length increased sharply in the range from P5 to P3, the coil length ushered in the initial peak on P3, after which the coil length decreased in the range from P3 to P2, and then again from P2 to The coil length increases again in the range of P1. Since the coil length is increased or decreased like this, there is a problem that the frictional resistance is unstable. [28]

In this regard, with this embodiment, as shown in FIG. 1 (a) and FIG. 3, the coil length gradually increases in a range from P5 to P1. In other words, the stitch length of the present embodiment is configured such that the stitch length of the knitting yarn S gradually increases and does not decrease in the process of moving the stitches of the knitting yarn S along the back surface 20 a of the tongue portion 20 toward the tip side until the stitches are separated from the tongue portion 20. With such a configuration, the stitch length can be increased gradually, the sharp change in friction resistance can be suppressed, and the stitches of the knitting yarn S can be smoothly separated from the tip of the tongue 10. In addition, since the coil length does not increase or decrease during the process until the coil is disengaged from the tip of the pin 10, the frictional resistance can be stabilized. [29]

In addition, since the back surface 11a of the needle body 11 of the present embodiment is gradually inclined toward the top end in a tapering direction until the top end, the loop of the knitting yarn S can be smoothly detached from the top end of the tongue 10 without leaving the tongue 20 The rear hook is hooked on the back surface 11 a of the needle body 11. [30]

In addition, in the embodiment described above, the concave shape 11 b is formed into a shape in which the back surface 11 a of the needle body 11 is bent inward, but it is not limited to this. That is, a chamfered shape formed on the back surface 11a of the needle body 11 may be used as the concave shape 11b instead of the curved shape or in addition to the curved shape. Specifically, as shown in FIGS. 4 to 6, a concave shape 11 b may be formed by chamfering a corner portion on the back surface 11 a side of the needle body 11. [31]

As described above, according to this embodiment, the needle body 11 has a concave shape 11b on the back surface 11a, which is the side opposite to the surface facing the tongue 20, and the locked state is viewed from the side along the axial direction A. When the tongue needle 10 is lowered, the concave shape 11 b is provided at least until the needle body 11 and the back surface 20 a of the tongue portion 20 intersect. With such a structure, it is possible to prevent the frictional resistance from changing sharply when the loop of the knitting yarn S is placed on the tongue portion 20. That is, in the conventional configuration, when the stitches of the knitted yarn S are detached toward the distal end side along the back surface 20 a of the tongue portion 20 in the closed state, the stitches of the knitted yarn S are put on the back surface 20 a of the tongue portion 20 and When slipping was started, the stitches of the knitting yarn S suddenly expanded, and the frictional resistance fluctuated sharply. In this regard, according to this embodiment, since the concave shape 11b is provided, the stitches of the knitting yarn S will gradually expand without sharply expanding even after the tongue 20 is simply put on the tongue 20. Therefore, the latch needle The frictional resistance between 10 and knitting yarn S is stable, and it can knit beautiful fabrics. In addition, since the knitting resistance is small, power consumption of the knitting machine can be suppressed, and breakage of the tongue needle 10 can be suppressed.

10‧‧‧ Tongue Needle

11‧‧‧ Needle body

11a‧‧‧Back

11b‧‧‧ concave shape

13‧‧‧ Needle bar

14‧‧‧ Hook

14a‧‧‧Top

15‧‧‧ cheek

16‧‧‧Connecting Department

20‧‧‧ Tongue

20a‧‧‧Back

20b‧‧‧Slot

20c‧‧‧Mountain

20d‧‧‧Top slope

20e‧‧‧Rear slope

25‧‧‧Rotating shaft

S‧‧‧ knitted yarn

X‧‧‧ cross position

A‧‧‧Axial

[15]

[16] FIG. 1 is a view showing a latching state of the tongue needle according to the first embodiment. FIG. 1 (a) is a graph showing an increase or decrease in coil length, and FIG. 1 (b) is a partial enlargement of a tip portion. A side view, (c) of FIG. 1 is a cross-sectional view when cut with a plane perpendicular to the axial direction. FIG. 2 is a view showing a clearing state of the tongue needle of the first embodiment. FIG. 2 (a) is a graph showing an increase or decrease in a coil length, and FIG. 2 (b) is a partially enlarged side of a tip portion. The view, (c) of FIG. 2 is a cross-sectional view when cut with a plane perpendicular to the axial direction. FIG. 3 is a table showing the coil length of the tongue needle of the first embodiment. FIG. 4 is a diagram showing the latching state of the tongue needle according to the second embodiment. FIG. 4 (a) is a graph showing an increase or decrease in the coil length, and FIG. 4 (b) is a partially enlarged side view of the tip portion. FIG. 4 (c) is a cross-sectional view when cut with a plane perpendicular to the axial direction. Fig. 5 is a view showing the open state of the tongue needle of the second embodiment. Fig. 5 (a) is a graph showing the increase and decrease of the coil length, and Fig. 5 (b) is a partially enlarged side view of the tip portion. (C) of 5 is a cross-sectional view when cut with a plane perpendicular to the axial direction. Fig. 6 is a table showing the coil length of the tongue needle according to the second embodiment. FIG. 7 is a view showing a conventional latching state of the needle. FIG. 7 (a) is a graph showing an increase or decrease in the coil length, and FIG. 7 (b) is a partially enlarged side view of the tip portion. (C) is a cross-sectional view when cut with a plane perpendicular to the axial direction. FIG. 8 is a view showing a conventional open state of the needle. FIG. 8 (a) is a graph showing an increase or decrease in the coil length, FIG. 8 (b) is a partially enlarged side view of the distal end portion, and FIG. 8 ( c) is a cross-sectional view when cutting with a plane perpendicular to the axial direction. FIG. 9 is a table showing a coil length of a conventional tongue needle.

Claims (5)

A tongue needle includes: a needle body having a hook-shaped hook portion at a top end thereof; and a tongue portion being rotatably mounted to the needle body, and the tongue portion being able to contact and separate from the hook portion The latch needle is characterized in that: in a locked state where the tongue portion and the hook portion are in contact with each other, the loop of the knitting yarn is disengaged along the back surface of the tongue portion toward the tip side, and the needle body is on the facing surface. The surface on the side opposite to the surface of the tongue, that is, the back surface has a concave shape; when the tongue needle in the locked state is viewed from the side in the axial direction, the concave shape is provided at least to the needle body and Up to the position where the back surfaces of the tongues intersect. The tongue needle according to claim 1, wherein the concave shape is characterized by a shape in which a back surface of the needle body is bent inward. The tongue needle according to claim 1 or 2, wherein the concave shape is characterized by a chamfered shape formed on a back surface of the needle body. The tongue needle according to any one of claims 1 to 3, wherein the back surface of the needle main body is gradually inclined toward a tapering direction until it is characterized by the tip. The tongue needle according to any one of claims 1 to 4, wherein the length of the shortest yarn curled around the needle body and the tongue is defined as the stitch length of the knitting yarn At this time, the stitch length of the knitting yarn is gradually increased without decreasing while the stitch of the knitting yarn moves along the back surface of the tongue toward the tip side until it is detached from the tongue.