阅读说明：本技术 一种电脑横编针织机衬纬纱导纱系统 (Weft insertion yarn guide system of computer flat knitting machine ) 是由 李育红 朱立夫 马希东 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种电脑横编针织机衬纬纱导纱系统,涉及到电脑横编针织机辅助构件技术领域,包括支架、主动送纱装置、衬纬纱回弹装置、衬纬纱导纱装置和衬纬纱嘴,支架上设有主动送纱装置和衬纬纱回弹装置,主动送纱装置位于衬纬纱回弹装置的上侧,主动送纱装置与衬纬纱回弹装置之间设有衬纬纱导纱装置,支架的一侧设有衬纬纱嘴,主动送纱装置中的纱线依次穿过衬纬纱导纱装置和衬纬纱回弹装置后并进入衬纬纱嘴内。其可以使得纱线在移动的过程中的滑动摩擦变成滚动摩擦,减小了摩擦力；其次,也能够改变进纱方向,使衬纬纱在通过纱嘴前后有更小的弯折,是衬纬纱更平稳的导入,减少损伤。(The invention discloses a weft insertion yarn guide system of a computer flat knitting machine, which relates to the technical field of auxiliary components of the computer flat knitting machine and comprises a support, an active yarn feeding device, a weft insertion yarn rebounding device, a weft insertion yarn guide device and a weft insertion yarn nozzle, wherein the support is provided with the active yarn feeding device and the weft insertion yarn rebounding device, the active yarn feeding device is positioned at the upper side of the weft insertion yarn rebounding device, the weft insertion yarn guide device is arranged between the active yarn feeding device and the weft insertion yarn rebounding device, the weft insertion yarn nozzle is arranged at one side of the support, and yarns in the active yarn feeding device sequentially pass through the weft insertion yarn guide device and the weft insertion yarn rebounding device and then enter the weft insertion yarn nozzle. The yarn guide device can change sliding friction of the yarn in the moving process into rolling friction, and reduce friction force; and secondly, the yarn feeding direction can be changed, so that the weft insertion yarn is bent slightly before and after passing through the yarn nozzle, the weft insertion yarn is guided in more stably, and the damage is reduced.)

1. The weft insertion yarn guide system of the computer flat knitting machine is characterized by comprising a support, an active yarn feeding device, a weft insertion yarn rebounding device, a weft insertion yarn guide device and a weft insertion yarn nozzle, wherein the active yarn feeding device and the weft insertion yarn rebounding device are arranged on the support, the active yarn feeding device is positioned on the upper side of the weft insertion yarn rebounding device, the weft insertion yarn guide device is arranged between the active yarn feeding device and the weft insertion yarn rebounding device, the weft insertion yarn nozzle is arranged on one side of the support, and yarns in the active yarn feeding device sequentially penetrate through the weft insertion yarn guide device and the weft insertion yarn rebounding device and then enter the weft insertion yarn nozzle.

2. The weft inserted yarn guiding system of the computer flat knitting machine according to claim 1, wherein the active yarn feeding device comprises a first cross bar, a weft inserted yarn bobbin and a driving mechanism, one end of the first cross bar is connected with the bracket, the other end of the first cross bar is provided with the driving mechanism and the weft inserted yarn bobbin, and the driving mechanism is connected with the weft inserted yarn bobbin.

3. The weft inserted yarn guiding system of the computer flat knitting machine according to claim 2, wherein the driving mechanism comprises a first gear shaft, a belt, a second gear shaft and a motor, the second gear shaft is arranged on an output shaft of the motor, the first gear shaft is arranged at the other end of the first cross bar, the first gear shaft and the second gear shaft are connected through the belt, and the first gear shaft is in transmission connection with the weft inserted yarn bobbin.

4. The weft inserted yarn guiding system of the computer flat knitting machine according to claim 3, further comprising a first connecting rod, a second connecting rod, a fixed sleeve and a coupling, wherein the first connecting rod is disposed on the upper side of the other end of the first cross bar, the second connecting rod is disposed on the lower side of the other end of the first cross bar, the fixed sleeve is disposed on the first connecting rod, the coupling is disposed in the fixed sleeve, the first gear shaft is disposed at one end of the coupling, the weft inserted yarn bobbin is disposed at the other end of the coupling, and the motor is disposed on the second connecting rod.

5. The computer flat knitting machine weft inserted yarn guiding system as claimed in claim 2, further comprising a second cross bar, wherein said second cross bar is disposed on the lower side of said first cross bar, and both ends of said second cross bar are connected to said bracket, and said weft inserted yarn guiding device is disposed on said second cross bar.

6. The weft inserted yarn guiding system of the computerized flat knitting machine according to claim 5, wherein the weft inserted yarn guiding device comprises a first pulley, a second pulley, a third pulley and a fourth pulley, wherein a third connecting rod is provided at one side of the second cross rod, one end of the third connecting rod is connected with the second cross rod, the other end of the third connecting rod is provided with the first pulley, and the second pulley, the third pulley and the fourth pulley are sequentially provided at the third connecting rod from the other end to one end thereof.

7. The computer flat knitting machine weft inserted yarn guide system according to claim 6, wherein the weft inserted yarn rebounding device comprises a fourth connecting rod, a fifth connecting rod, a sensor, steel wires, a sliding block, an induction iron sheet and a fifth pulley, the fourth connecting rod is horizontally arranged at the lower end of the support, the fifth connecting rod is vertically arranged at one end of the fourth connecting rod, the fourth connecting rod is arranged at the lower side of the third connecting rod, the two steel wires are arranged side by side, one ends of the two steel wires are connected with the third connecting rod, the other ends of the two steel wires are connected with the fourth connecting rod, the sliding block is arranged on the two steel wires, the fifth pulley is arranged at the upper end of the sliding block, the induction iron sheet is arranged at one end of the sliding block, the sensor is arranged at the upper end of the fifth connecting rod, and the sensor is opposite to the induction iron sheet.

8. The weft inserted yarn guiding system of the computerized flat knitting machine according to claim 7 further comprising a weight, wherein the weight is provided at a lower end of the slider.

9. The weft inserted yarn guide system of the computer flat knitting machine according to claim 1, wherein the weft inserted yarn nozzle comprises a yarn nozzle handle, a yarn nozzle head, a third cross bar, a sixth pulley and a blocking piece, the yarn nozzle head is arranged at one end of the yarn nozzle handle, one end of the third cross bar is connected with the yarn nozzle handle, the sixth pulley is arranged at the other end of the yarn nozzle handle, the blocking piece is arranged on the outer side of the sixth pulley, and the yarn nozzle handle is connected with the bracket.

10. The weft inserted yarn guiding system of the computerized flat knitting machine according to claim 9 wherein the other end of the third cross bar is provided with a strip-shaped hole, and the sixth pulley is slidably connected with the strip-shaped hole.

Technical Field

The invention relates to the technical field of auxiliary components of a computer flat knitting machine, in particular to a weft insertion yarn guide system of the computer flat knitting machine.

Background

The computerized flat knitting machine is provided with a plurality of yarn guiding and feeding devices, when in knitting, yarns are required to be directly led out from a yarn disc to a yarn pre-tension adjusting device to adjust tension, the yarns are led out from the yarn pre-tension adjusting device and then enter a yarn clamping device through a yarn feeder, the yarns are led into a yarn guiding device after being led out from the yarn clamping device, and the yarns are led into a yarn nozzle to wait for machine knitting through a spring and a yarn guiding porcelain ring in the yarn guiding device.

The yarn guide device is not comprehensive, but the yarn guide paths of the existing yarn guide devices on the market tend to be the same. Weft insertion yarn also needs to pass through above-mentioned feed carrier when weaving among the traditional mode, need pass through a plurality of bending points, has increased weft insertion yarn and has increased the friction of its weft insertion yarn and each contact point, produces the condition that weft insertion yarn is neglected to be tight easily at the leading-in-process, can't accomplish stable leading yarn to influence cloth cover effect. The larger the friction force is, the probability of breakage of the weft inserted yarns is increased, and when the friction force is large enough, the force required for moving the yarn nozzle is correspondingly increased, so that the rising and falling of pins in the machine head of the computer flat knitting machine are influenced, and the whole knitting system is influenced. In general, the number of weft inserted yarns is much larger than the number of main yarns to be woven, and parameters of a plurality of accessories (a yarn guide porcelain ring, a yarn mouth caliber, a yarn clamping hole and the like in a yarn guide device) in one machine are constant, so that the weft inserted yarns cannot be introduced when the main yarns are woven.

Machines in the current industry are also equipped with weft-inserted yarn mouths, which simply increase the width of the mouth compared to conventional yarn mouths. In the action that the weft inserted yarns are inserted into the fabric from the yarn nozzle opening, the weft inserted yarns pass through a larger bending angle, the weft inserted yarns with large bending modulus can cause larger damage to the weft inserted yarns after passing through the yarn nozzle opening, and the quality of the fabric cannot be achieved.

Disclosure of Invention

The invention aims to provide a weft insertion yarn guide system of a computer flat knitting machine, which is used for solving the technical problem.

The technical scheme adopted by the invention is as follows:

the weft insertion yarn guide system of the computer flat knitting machine comprises a support, an active yarn feeding device, a weft insertion yarn rebounding device, a weft insertion yarn guide device and a weft insertion yarn nozzle, wherein the active yarn feeding device and the weft insertion yarn rebounding device are arranged on the support, the active yarn feeding device is positioned on the upper side of the weft insertion yarn rebounding device, the weft insertion yarn guide device is arranged between the active yarn feeding device and the weft insertion yarn rebounding device, the weft insertion yarn nozzle is arranged on one side of the support, and yarns in the active yarn feeding device sequentially penetrate through the weft insertion yarn guide device and the weft insertion yarn rebounding device and then enter the weft insertion yarn nozzle.

Preferably, the active yarn feeding device comprises a first cross bar, a weft insertion yarn spool and a driving mechanism, one end of the first cross bar is connected with the bracket, the driving mechanism and the weft insertion yarn spool are arranged at the other end of the first cross bar, and the driving mechanism is connected with the weft insertion yarn spool.

Preferably, the driving mechanism comprises a first gear shaft, a belt, a second gear shaft and a motor, the second gear shaft is arranged on an output shaft of the motor, the first gear shaft is arranged at the other end of the first cross rod, the first gear shaft is connected with the second gear shaft through the belt, and the first gear shaft is in transmission connection with the weft insertion bobbin.

As a further preferred option, the device further comprises a first connecting rod, a second connecting rod, a fixed shaft sleeve and a shaft coupler, wherein the first connecting rod is arranged on the upper side of the other end of the first cross rod, the second connecting rod is arranged on the lower side of the other end of the first cross rod, the fixed shaft sleeve is arranged on the first connecting rod, the shaft coupler is arranged in the fixed shaft sleeve, the first gear shaft is arranged at one end of the shaft coupler, the weft-inserted yarn shaft is arranged at the other end of the first cross rod, and the motor is arranged on the second connecting rod.

Preferably, the weft insertion device further comprises a second cross bar, the second cross bar is arranged on the lower side of the first cross bar, two ends of the second cross bar are connected with the support, and the weft insertion yarn guide device is arranged on the second cross bar.

Preferably, the weft inserted yarn guiding device comprises a first pulley, a second pulley, a third pulley and a fourth pulley, wherein a third connecting rod is arranged on one side of the second cross rod, one end of the third connecting rod is connected with the second cross rod, the other end of the third connecting rod is provided with the first pulley, and the second pulley, the third pulley and the fourth pulley are sequentially arranged on the third connecting rod from the other end to one end of the third connecting rod.

As a further preferred option, the weft inserted yarn rebounding device comprises a fourth connecting rod, a fifth connecting rod, a sensor, a steel wire, a sliding block, an induction iron sheet and a fifth pulley, wherein the fourth connecting rod is horizontally arranged at the lower end of the support, the fifth connecting rod is vertically arranged at one end of the fourth connecting rod, the fourth connecting rod is arranged at the lower side of the third connecting rod, the two steel wires are arranged side by side, one end of each steel wire is connected with the third connecting rod, the other end of each steel wire is connected with the fourth connecting rod, the sliding block is arranged on each steel wire, the fifth pulley is arranged at the upper end of the sliding block, the induction iron sheet is arranged at one end of the sliding block, the sensor is arranged at the upper end of the fifth connecting rod, and the sensor is opposite to the induction iron sheet.

Preferably, the slide block further comprises a weight, and the weight is arranged at the lower end of the slide block.

Preferably, the weft insertion yarn nozzle comprises a yarn nozzle handle, a yarn nozzle head, a third cross rod, a sixth pulley and a blocking piece, the yarn nozzle head is arranged at one end of the yarn nozzle handle, one end of the third cross rod is connected with the yarn nozzle handle, the sixth pulley is arranged at the other end of the third cross rod, the blocking piece is arranged on the outer side of the sixth pulley, and the yarn nozzle handle is connected with the support.

Preferably, the other end of the third cross rod is provided with a strip-shaped hole, and the sixth pulley is connected with the strip-shaped hole in a sliding manner.

The technical scheme has the following advantages or beneficial effects:

the design of the pulleys in the weft insertion yarn guide device can change the sliding friction of the yarns in the moving process into rolling friction, so that the friction force is reduced; and secondly, a pulley is additionally arranged at the tail end of a transverse shaft in the weft insertion yarn nozzle to change the yarn feeding direction, so that the weft insertion yarn is bent slightly before and after passing through the yarn nozzle, the weft insertion yarn is guided in more stably, and the damage is reduced.

Drawings

FIG. 1 is a schematic view of the forward structure of the weft insertion yarn guiding system of the computerized flat knitting machine of the present invention;

FIG. 2 is a schematic side view of the weft insertion yarn guiding system of the computerized flat knitting machine of the present invention;

FIG. 3 is a schematic view of the construction of the weft insertion nozzle according to the present invention.

In the figure: 1. a support; 2. a first cross bar; 3. a weft inserted yarn bobbin; 4. a first gear shaft; 5. a belt; 6. a second gear shaft; 7. a motor; 8. a first link; 9. a second link; 10. fixing the shaft sleeve; 11. a coupling; 12. a second cross bar; 13. a first pulley; 14. a second pulley; 15. a third pulley; 16. a fourth pulley; 17. a fourth link; 18. a fifth link; 19. a sensor; 20. a steel wire; 21. a slider; 22. sensing an iron sheet; 23. a fifth pulley; 24. a weight; 25. a yarn nozzle handle; 26. a yarn nozzle head; 27. a third cross bar; 28. a sixth pulley; 29. a baffle plate; 30. a strip-shaped hole; 31. a third link; 32. and weft insertion yarns.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

FIG. 1 is a schematic view of the forward structure of the weft insertion yarn guiding system of the computerized flat knitting machine of the present invention; FIG. 2 is a schematic side view of the weft insertion yarn guiding system of the computerized flat knitting machine of the present invention; fig. 3 is a schematic structural diagram of a weft insertion nozzle of the present invention, please refer to fig. 1 to 3, which show a preferred embodiment, showing a weft insertion yarn guide system of a computer flat knitting machine, comprising a support 1, an active yarn feeding device, a weft insertion yarn rebounding device, a weft insertion yarn guide device and a weft insertion nozzle, wherein the support 1 is provided with the active yarn feeding device and the weft insertion yarn rebounding device, the active yarn feeding device is located on the upper side of the weft insertion yarn rebounding device, the weft insertion yarn guide device is arranged between the active yarn feeding device and the weft insertion yarn rebounding device, one side of the support 1 is provided with the weft insertion nozzle, and yarns in the active yarn feeding device sequentially pass through the weft insertion yarn guide device and the weft insertion yarn rebounding device and then enter the weft insertion nozzle. In this embodiment, as shown in fig. 1, the whole support 1 is a rectangular frame structure, the active yarn feeding device is arranged at the upper end of the support 1, the weft insertion yarn guiding device is arranged at the middle part of the support 1, the weft insertion yarn rebounding device is arranged at the bottom of the support 1, and the weft insertion yarn nozzle is arranged at one side of the support 1 and is opposite to the weft insertion yarn guiding device. The weft insertion nozzle in this embodiment may also be disposed outside the bracket 1, and may not necessarily be connected to the bracket 1, and may be fixed outside the bracket 1 by a separate fixing frame.

Further, as a preferred embodiment, the active yarn feeding device comprises a first cross bar 2, a weft insertion yarn spool 3 and a driving mechanism, wherein one end of the first cross bar 2 is connected with the bracket 1, the other end of the first cross bar 2 is provided with the driving mechanism and the weft insertion yarn spool 3, and the driving mechanism is connected with the weft insertion yarn spool 3. In this embodiment, as shown in fig. 1, the first cross bar 2 is horizontally disposed, the first cross bar 2 is disposed along the width direction of the bracket 1, a space is provided between the other end of the first cross bar 2 and the side wall of the bracket 1, and the driving mechanism is configured to drive the weft insertion yarn spool 3 to pay off.

Further, as a preferred embodiment, the driving mechanism comprises a first gear shaft 4, a belt 5, a second gear shaft 6 and a motor 7, the second gear shaft 6 is arranged on an output shaft of the motor 7, the first gear shaft 4 is arranged at the other end of the first cross rod 2, the first gear shaft 4 is connected with the second gear shaft 6 through the belt 5, and the first gear shaft 4 is in transmission connection with the weft insertion bobbin 3. The motor 7 in this embodiment is used for driving the second gear shaft 6 to drive the first gear shaft 4 to rotate, so that the first gear shaft 4 drives the weft insertion yarn spool 3 to rotate, and the paying-off action is realized.

Further, as a preferred implementation mode, the device further comprises a first connecting rod 8, a second connecting rod 9, a fixed shaft sleeve 10 and a shaft coupler 11, the first connecting rod 8 is arranged on the upper side of the other end of the first cross rod 2, the second connecting rod 9 is arranged on the lower side of the other end of the first cross rod 2, the fixed shaft sleeve 10 is arranged on the first connecting rod 8, the shaft coupler 11 is arranged in the fixed shaft sleeve 10, a first gear shaft 4 is arranged at one end of the shaft coupler 11, a weft-inserted yarn shaft 3 is arranged at the other end of the shaft coupler, and a motor 7 is arranged on the second connecting rod 9. In this embodiment, as shown in fig. 1, the fixing shaft sleeve 10 is sleeved on the outer side of the shaft coupler 11, the shaft coupler 11 is fixed on the first connecting rod 8 through the fixing shaft sleeve 10, the motor 7 is fixedly connected with the second connecting rod 9, and the motor 7 and the second connecting rod 9 can be fixed by a motor base or fixed on the second connecting rod 9 through a bolt. The shaft coupling 11 can rotate in the fixed shaft sleeve 10, and two ends of the shaft coupling 11 are connected with the first gear shaft 4 and the weft inserted yarn spool 3. Wherein, a plurality of tooth blocks connected with the belt 5 are arranged on the first gear shaft 4 and the second gear shaft 6. When the motor 7 drives the second gear shaft 6 to rotate, the second gear shaft 6 drives the first gear shaft 4 to rotate through the belt 5, and the first gear shaft 4 drives the coupler 11 to drive the weft insertion bobbin 3 to rotate, so that the paying-off action is realized.

Further, as a preferred embodiment, the weft insertion yarn guiding device further comprises a second cross bar 12, the second cross bar 12 is arranged on the lower side of the first cross bar 2, two ends of the second cross bar 12 are connected with the bracket 1, and the weft insertion yarn guiding device is arranged on the second cross bar 12. In this embodiment, as shown in fig. 1, the second cross bar 12 is parallel to the first cross bar 2, and two ends of the second cross bar 12 are connected to inner walls of two sides of the bracket 1.

Further, as a preferred embodiment, the weft inserted yarn guiding device comprises a first pulley 13, a second pulley 14, a third pulley 15 and a fourth pulley 16, wherein a third connecting rod 31 is arranged on one side of the second cross rod 12, one end of the third connecting rod 31 is connected with the second cross rod 12, the other end of the third connecting rod 31 is provided with the first pulley 13, and the third connecting rod 31 is provided with the second pulley 14, the third pulley 15 and the fourth pulley 16 sequentially from the other end to one end thereof. In the embodiment, as shown in fig. 2, the first pulley 13, the second pulley 14, the third pulley 15 and the fourth pulley 16 are arranged, so that the original sliding friction in the weft insertion yarn 32 (yarn) feeding process is changed into the current rolling friction, the friction force is reduced, and the first pulley 13, the second pulley 14, the third pulley 15 and the fourth pulley 16 can rotate in the weft insertion yarn 32 feeding process. Wherein, the weft insertion yarn 32 on the weft insertion bobbin 3 passes through the first pulley 13, the second pulley 14, the third pulley 15 and the fourth pulley 16 in sequence.

Further, as a preferred embodiment, the weft inserted yarn rebounding device comprises a fourth connecting rod 17, a fifth connecting rod 18, a sensor 19, steel wires 20, a sliding block 21, an induction iron sheet 22 and a fifth pulley 23, the fourth connecting rod 17 is horizontally arranged at the lower end of the support 1, the fifth connecting rod 18 is vertically arranged at one end of the fourth connecting rod 17, the fourth connecting rod 17 is arranged at the lower side of the third connecting rod 31, the two steel wires 20 are arranged side by side, one ends of the two steel wires 20 are connected with the third connecting rod 31, the other ends of the two steel wires 20 are connected with the fourth connecting rod 17, the sliding block 21 is arranged on the two steel wires 20, the fifth pulley 23 is arranged at the upper end of the sliding block 21, the induction iron sheet 22 is arranged at one end of the sliding block 21, the sensor 19 is arranged at the upper end of the fifth connecting rod 18, and the sensor 19 is opposite to the induction iron sheet 22. In this embodiment, as shown in fig. 2, the switch of the motor 7 is determined by the signal detected by the sensor 19, when the yarn needs to be fed, the weft insertion yarn 32 drives the induction iron sheet 22, and the sensor 19 controls the motor 7 to actively feed the yarn, so that the sliding block 21 is in a specified range, and the friction force caused by straightening the weft insertion yarn 32 is greatly reduced. In this embodiment, the weft insertion yarn 32 passes through the third pulley 15 and then passes through the fifth pulley 23, and the weft insertion yarn 32 can drive the sliding block 21 to slide along the steel wire 20, so that the sliding block 21 drives the induction iron sheet 22 to move up and down within the induction range of the sensor 19. In this embodiment, as shown in fig. 2, two wires 20 are located between the third pulley 15 and the fourth pulley 16. Through the arrangement of the first pulley 13, the second pulley 14, the third pulley 15, the fourth pulley 16 and the fifth pulley 23, compared with a traditional yarn guide ring and the like, the bending radius can be increased by using the pulleys, and the damage of a machine to the liner yarn 32 can be reduced.

Further, as a preferred embodiment, the slide further comprises a weight 24, and the lower end of the slide 21 is provided with the weight 24. In this embodiment, the weight of the weight 24 in the weft insertion rebounding device can be changed according to the material of the weft insertion 32 to change the tension of the weft insertion 32.

Further, as a preferred embodiment, the weft insertion yarn nozzle comprises a yarn nozzle handle 25, a yarn nozzle head 26, a third cross bar 27, a sixth pulley 28 and a baffle 29, wherein the yarn nozzle head 26 is arranged at one end of the yarn nozzle handle 25, one end of the third cross bar 27 is connected with the yarn nozzle handle 25, the sixth pulley 28 is arranged at the other end of the third cross bar 27, the baffle 29 is arranged on the outer side of the sixth pulley 28, and the yarn nozzle handle 25 is connected with the bracket 1. In this embodiment, as shown in fig. 3, the radius of the nozzle opening ellipse of the nozzle head 26 is increased, the third cross bar 27 is added to the nozzle handle 25, and the sixth pulley 28 is added to the end of the third cross bar 27 to change the yarn feeding direction, so that the weft inserted yarn 32 is bent less before and after passing through the nozzle, and the weft inserted yarn 32 is led in more smoothly, and the damage is reduced. In the embodiment, grooves are formed in the middles of the first pulley 13, the second pulley 14, the third pulley 15, the fourth pulley 16, the fifth pulley 23 and the sixth pulley 28, the weft inserted yarns 32 are located in the grooves, the depth of each groove is larger than the thickness of each weft inserted yarn 32, and the width of each groove is larger than the width of each weft inserted yarn 32, so that the bending radius of the introduced weft inserted yarns 32 during bending is increased, and the damage to the weft inserted yarns 32 is reduced.

Further, as a preferred embodiment, the other end of the third cross bar 27 is provided with a strip-shaped hole 30, and the sixth pulley 28 is slidably connected with the strip-shaped hole 30. In this embodiment, as shown in fig. 3, the sixth pulley 28 can slide along the length direction of the bar-shaped hole 30, and the sliding distance is-20 mm to 20 mm. The sixth pulley 28 in this embodiment is slidably connected to the strip hole 30 by a bolt.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.