Weft insertion mechanism and screen weaving machine

Abstract

The present invention provides a weft insertion mechanism and a wire mesh knitting machine. The weft insertion mechanism includes a swing frame, a weft feed sword head, a weft receiving sword head, and a driving assembly. The top end of the swing frame has a limit sliding space arranged along the width direction of the wire mesh. The weft feed sword head is slidably arranged in the limit sliding space and can clamp and traction the weft yarn released from the weft accumulator. The weft receiving sword head is slidably arranged in the limit sliding space. The weft receiving sword head has a clamping opening arranged towards the width direction of the wire mesh and can extend into the weft feed sword head to clamp the weft yarn. There are two driving assemblies, which are respectively arranged on the swing frame and are located on both sides of the swing frame along the width direction of the wire mesh, and can respectively drive the weft feed sword head and the weft receiving sword head to move relatively or move away from each other. The weft insertion mechanism provided by the present invention can effectively ensure the stability of the weft yarn handover, and at the same time ensure the weft insertion effect of the weft yarn, and has strong practicability.

Description

Technical Field

[0001] The invention belongs to the technical field of wire mesh weaving, and in particular relates to a weft threading mechanism and a wire mesh weaving machine. Background Art

[0002] The silk screen is woven by warp and weft through a silk screen weaving machine. The silk screen weaving process includes a variable interlacing mechanism, a sword-throwing weft insertion mechanism, and a weft threading mechanism. The variable interlacing mechanism causes the warp to interlace with each other and form a weft opening. The sword-throwing weft insertion mechanism carries the weft into the weft opening horizontally and withdraws it in time. Then the weft-beating mechanism pushes the inserted weft. When the width of the silk screen is large, two sword belt drive structures will be set in the sword-throwing weft insertion mechanism in the width direction of the silk screen, and they carry two sword belts to move relative to each other. One of the sword belts is connected to a weft delivery sword head, and the other sword belt carries a weft receiving sword head, and the two cooperate with each other.

[0003] In the prior art, the weft delivery rapier head is usually provided with an elastic pressure palm, which clamps the weft yarn. The weft connection rapier is a slender pointed head, and the head is provided with a hook with a clamping function. When the weft is joined, the head of the weft connection rapier head extends into the weft delivery rapier head, hooks the weft, and squeezes the elastic pressure palm of the weft delivery rapier head, so that the weft delivery rapier head releases the weft and completes the weft insertion and handover. However, the clamping mouth of the hook faces the arrangement direction of the warp, and before clamping the weft, the hook needs to pass through the weft for a distance so that the weft falls into the clamping mouth. During this process, the end of the hook will disturb the weft to a certain extent. Due to the small space, the weft will often bend and deform, and the weft cannot enter the clamping mouth, and then the weft cannot be clamped by the hook, resulting in the weft cannot be transferred and the weft insertion effect is poor; and when the tension of the weft is too large under the traction of the wire storage device and the weft feeding sword head, the weft will be torn apart by the disturbance of the hook, resulting in failure of weft threading, poor stability of the weft transfer, and ultimately affecting the quality of the product and poor practicality. Summary of the invention

[0004] The embodiments of the present invention provide a weft insertion mechanism and a wire mesh weaving machine, aiming to solve the problem of poor practicality of the existing sword-throwing weft insertion mechanism.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: to provide a weft threading mechanism, comprising:

[0006] A swing frame is used to be rotatably arranged on the frame of the wire mesh weaving machine so as to pitch and rotate along with the beating mechanism; the top end of the swing frame has a limited sliding space arranged along the width direction of the wire mesh;

[0007] A weft-feeding rapier head is slidably arranged in the limited sliding space and is used for clamping and pulling the weft released from the weft storage device;

[0008] A weft-joining rapier is slidably arranged in the limited sliding space, and the weft-joining rapier has a clamping opening arranged in the width direction of the wire mesh, which is used to extend into the weft-sending rapier and clamp the weft; and

[0009] There are two driving assemblies, which are respectively arranged on the swing frame and located on both sides of the swing frame along the width direction of the wire mesh, and are used to respectively drive the weft sending rapier head and the ending rapier head to move relative to or away from each other.

[0010] In a possible implementation, a plurality of vertical plates are provided at the top of the swing frame, each of the vertical plates is arranged along the vertical direction, and each of the vertical plates is arranged at intervals along the width direction of the wire mesh, each of the vertical plates is provided with a limit opening, and each of the limit openings is combined to form the limit sliding space.

[0011] In a possible implementation, a first direction is set as the length direction of the limit sliding space, and a second direction is set as the width direction of the limit sliding space; the weft connecting sword head includes a first shell, a clamping arm, a connecting rod, a shift rod and a first spring; two clamping arms are provided, and the two clamping arms are rotatably set on the first shell, and the rotation direction is set along the radial direction of the swing frame, and each clamping arm is provided with a fixed extension rod, and each fixed extension rod is set at an angle with the corresponding clamping arm to form the clamping port between the two clamping arms; two connecting rods are provided, and the two connecting rods are set in a one-to-one correspondence with the two fixed extension rods, and one end of each connecting rod is respectively hinged to the corresponding fixed extension rod; the shift rod is rotatably set on the first shell, and the rotation axis is set along the radial direction of the swing frame. The lever comprises a first end and a second end of the lever, a rotation point of the lever and the first shell being set as a first transfer point, the first transfer point being located between the first end of the lever and the second end of the lever, the first end of the lever being coaxially hinged with the second ends of the two connecting rods, the second end of the lever extending out of the first shell, and the lever being used to pull the fixed extension rods through the connecting rods to open the two clamping arms, or to pull the fixed extension rods through the connecting rods to close the two clamping arms after the second end of the lever is moved. One end of the first spring is connected to the first shell, and the other end is connected to the first end of the lever, and the first spring is used to fix the two positions of the first end of the lever respectively after the first end of the lever moves to both sides of the first transfer point along the first direction;

[0012] Wherein, a first limiting space for the second end of the shifting rod to pass through is provided in the limiting sliding space, and along the first direction, two ends of the first limiting space are respectively used to shift the second end of the shifting rod.

[0013] In a possible implementation, the connection point of the first spring and the first housing is spaced from the first transfer point along the second direction.

[0014] In a possible implementation, the length direction of the limiting sliding space is set as the first direction, and the width direction of the limiting sliding space is the second direction; the weft inserting sword head includes a second housing, a rotating shaft, a gear, an auxiliary traction frame, a rack and a second spring; the rotating shaft is rotatably arranged on the second housing, and the rotation axis of the rotating shaft is arranged along the second direction; the gear is coaxially and rotatably arranged on the rotating shaft; the auxiliary traction frame is spaced from the gear and fixedly connected to the rotating shaft, the auxiliary traction frame is used for traction weft yarn, and rotates under the drive of the rotating shaft, and bends the end of the weft yarn so that the end of the weft yarn forms a 90° angle with the first direction to face the clamping port; the rack is slidably arranged on the second housing along the first direction, the rack meshes with the gear, a limiting block is arranged at the bottom end of the rack, the limiting block passes through the second housing and protrudes out, a connecting column is arranged on the rack, and one end of the connecting column extends along the second direction; one end of the second spring is connected to the connecting column, and the other end is connected to the second housing. The second spring is used for fixing two positions of the rack respectively after the connecting column moves to both sides of the rotating shaft along the first direction.

[0015] Wherein, a sliding cavity for the rack to slide is arranged on the second housing; a second limiting space for the limiting block to pass through is arranged in the limiting sliding space, and both ends of the second limiting space respectively toggle the limiting block.

[0016] In a possible implementation, the connection point of the second spring and the second housing is spaced from the gear along the second direction.

[0017] In a possible implementation, the auxiliary traction frame includes a fixed rod, a cross bar, a vertical rod and a one-way limiting structure; one end of the fixed rod is connected to the rotating shaft, and the other end extends radially along the rotating shaft; the cross bar is perpendicular to the fixed rod, the cross bar is also perpendicular to the rotating shaft, and both ends of the cross bar extend to both sides of the fixed rod respectively; there are two vertical rods, both vertical rods are arranged parallel to the fixed rod, one end of each vertical rod is fixedly connected to one end of the cross bar, and the other end of each vertical rod is provided with a through port for the weft yarn to pass through, and a wire storage space for the clamping port to enter is formed between the two vertical rods; the one-way limiting structure is located in the through port close to the weft receiving sword head and is used for clamping the weft yarn unidirectionally during the weft inserting process of the weft inserting sword head.

[0018] The present invention also provides a wire mesh weaving machine having the above-mentioned weft threading mechanism.

[0019] Compared with the prior art, the weft insertion mechanism provided in the present implementation has a weft delivery sword head and a weft receiving sword head that are slidably arranged in the limited sliding space, and move relative to or opposite to each other under the drive of two driving components, which can effectively save the time of weft insertion, thereby improving the weaving efficiency of the silk screen. The clamping opening provided in the weft receiving sword head is arranged in the width direction of the silk screen, and can directly pass through the end of the weft wire in the weft delivery sword head without disturbing the weft wire, which can ensure that the weft wire accurately enters the clamping opening, and at the same time can prevent the weft wire from being broken due to a large tension. This structure can effectively ensure the stability of the weft handover, and at the same time ensure the weft insertion effect of the weft wire, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a swing frame in a weft threading mechanism provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a weft-joining rapier in a weft threading mechanism provided in an embodiment of the present invention (with a first limiting space attached);

[0022] Figure 3 A schematic diagram of the structure of the weft feeding rapier in the weft threading mechanism provided in an embodiment of the present invention Figure 1 ;

[0023] Figure 4 A schematic diagram of the structure of the weft feeding rapier in the weft threading mechanism provided in an embodiment of the present invention Figure 2 (with a second limited space);

[0024] Figure 5 A schematic diagram of the structure of an auxiliary traction frame in a weft threading mechanism provided by an embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of a one-way limiting structure in a weft threading mechanism provided in an embodiment of the present invention;

[0026] Description of reference numerals:

[0027] 10. Swing frame; 11. Vertical plate; 12. Limit sliding space; 13. First limit space; 14. Second limit space; 20. Weft delivery sword head; 21. Second shell; 22. Rotating shaft; 23. Gear; 24. Auxiliary traction frame; 241. Fixed rod; 242. Cross bar; 243. Vertical rod; 244. Passing; 245. One-way limit structure; 25. Second spring; 26. Limit block; 27. Connecting column; 28. Rack; 30. Weft receiving sword head; 31. First shell; 32. Clamping arm; 33. Connecting rod; 34. Push rod; 35. First spring; 36. Fixed extension rod; 40. Driving assembly. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Please also read Figures 1 to 4 The weft threading mechanism provided by the present invention is now described. The weft threading mechanism includes a swing frame 10, a weft delivery rapier 20, a weft connection rapier 30 and a driving assembly 40. The swing frame 10 can be rotatably arranged on the frame of the screen weaving machine to pitch and rotate along with the weft beating mechanism. The top of the swing frame 10 has a limited sliding space 12 arranged along the width direction of the screen. The weft delivery rapier 20 is slidably arranged in the limited sliding space 12, and can clamp and pull the weft released from the weft storage device. The weft connection rapier 30 is slidably arranged in the limited sliding space 12, and the weft connection rapier 30 has a clamping opening arranged in the width direction of the screen, which can be extended into the weft delivery rapier 20 and clamp the weft. Two driving assemblies 40 are provided, and the two driving assemblies 40 are respectively arranged on the swing frame 10, and are located on both sides of the swing frame 10 along the width direction of the screen, and can respectively drive the weft delivery rapier 20 and the ending rapier to move relative to or opposite to each other.

[0030] Compared with the prior art, the weft insertion mechanism provided in this embodiment has a weft delivery sword head 20 and a weft receiving sword head 30 which are slidably arranged in the limited sliding space 12 and move relative to or opposite to each other under the drive of two driving components, which can effectively save the time of weft insertion, thereby improving the weaving efficiency of the silk screen. The clamping opening provided in the weft receiving sword head 30 is arranged in the width direction of the silk screen, and can directly pass through the end of the weft wire in the weft delivery sword head 20 without disturbing the weft wire, which can ensure that the weft wire accurately enters the clamping opening, and at the same time can prevent the weft wire from being broken due to a large tension. This structure can effectively ensure the stability of the weft handover and the weft insertion effect of the weft wire, and is highly practical.

[0031] In some embodiments, the swing frame 10 may be configured as follows: Figure 2 See the structure shown. Figure 2 A plurality of vertical plates 11 are provided at the top of the swing frame 10, each of which is arranged in the vertical direction and is arranged at intervals along the width direction of the wire mesh, each of which is provided with a limit opening, and each of which is combined to form a limit sliding space 12. The plurality of vertical plates 11 can ensure the formation of the limit sliding space 12, and can prevent interference with the warp, so as to facilitate the formation of the cloth fell.

[0032] In some embodiments, the weft joining rapier 30 may be configured as follows: Figure 2 See the structure shown.Figure 2 , the length direction of the limited sliding space 12 is set as the first direction, and the width direction of the limited sliding space 12 is set as the second direction. The weft-joining rapier 30 includes a first shell 31, a clamping arm 32, a connecting rod 33, a lever 34 and a first spring 35. There are two clamping arms 32, both of which are rotatably arranged on the first shell 31, and the rotation direction is arranged along the radial direction of the swing frame 10. Each clamping arm 32 is provided with a fixed extension rod 36, and each fixed extension rod 36 is arranged at an angle with the corresponding clamping arm 32, and a clamping opening is formed between the two clamping arms 32. There are two connecting rods 33, and the two connecting rods 33 are arranged one-to-one with the two fixed extension rods 36, and one end of each connecting rod 33 is hinged to the corresponding fixed extension rod 36. The lever 34 is rotatably arranged on the first housing 31, and the rotation axis is arranged along the radial direction of the swing frame 10. The lever 34 has a first end of the lever 34 and a second end of the lever 34. The rotation point of the lever 34 and the first housing 31 is set as a first transfer point, and the first transfer point is located between the first end of the lever 34 and the second end of the lever 34. The first end of the lever 34 is coaxially hinged with the second ends of the two connecting rods 33, and the second end of the lever 34 extends out of the first housing 31. After the second end of the lever 34 is moved, the lever 34 can pull the fixed extension rods 36 through the connecting rods 33 to open the two clamping arms 32, or pull the fixed extension rods 36 through the connecting rods 33 to close the two clamping arms 32. One end of the first spring 35 is connected to the first housing 31, and the other end is connected to the first end of the lever 34. The first spring 35 can fix the two positions where the first end of the lever 34 is located after the first end of the lever 34 moves to both sides of the first transfer point along the first direction.

[0033] A first limiting space 13 for the second end of the lever 34 to pass through is provided in the limiting sliding space 12 , and along the first direction, two ends of the first limiting space 13 can respectively move the second end of the lever 34 .

[0034] When the first housing 31 moves towards the middle position of the wire mesh driven by the driving assembly, the clamping opening between the two clamping arms 32 is in an open state. When the first housing 31 moves close to the middle position of the wire mesh, after the second end of the lever 34 is abutted by one end of the first limiting space 13 and is toggled, the first end of the lever 34 will push the two connecting rods 33, and then the two connecting rods 33 will push the two fixed protruding rods 36, so that the two clamping arms 32 are closed to clamp the end of the weft yarn in the weft inserting sword head 20. Subsequently, the first housing 31 moves in the reverse direction. When it reaches the other end of the first limiting space 13, the second end of the lever 34 is toggled in the reverse direction. At this time, the first end of the lever 34 will pull the two connecting rods 33, the two connecting rods 33 will pull the two fixed protruding rods 36, and then the two clamping arms 32 will open to release the weft yarn. Repeating this way, the transfer of the weft yarn is realized. Due to the elastic movement of the spring, no matter where the second end of the lever 34 is located, it can be locked.

[0035] This structure can make the opening direction of the clamping opening set along the width direction of the wire mesh, which can effectively avoid disturbing the weft yarn when it enters the weft inserting sword head 20, thereby preventing the deformation of the weft yarn and at the same time preventing the weft yarn from being broken, ensuring the stable transfer of the weft yarn.

[0036] It should be noted that the first limiting space 13 can be formed by a first sub-opening provided on a part of the vertical plate 11 and communicating with the limiting opening, and the first limiting space 13 has a certain length. The two ends of the first limiting space 13 can be two vertical plates 11 without the first sub-opening.

[0037] In addition, anti-slip silicone pads can be provided on each clamping arm 32.

[0038] In some embodiments, the above-mentioned first spring 35 can adopt the structure as Figure 2 shown. Refer to Figure 2 , the connection point of the first spring 35 and the first housing 31 is spaced from the first transfer point along the second direction. With this structure of the first spring 35, when the lever 34 rotates to be set along the transmission direction of the warp yarn, the elastic force reaches the maximum, thereby ensuring that the first spring 35 can fix the two positions of the lever 34. The structure is simple and has strong practicability.

[0039] In some embodiments, the above-mentioned weft inserting sword head 20 can adopt the structure as Figures 3 to 4 shown. Refer to Figures 3 to 4, the length direction of the limited sliding space 12 is set as the first direction, and the width direction of the limited sliding space 12 is set as the second direction. The weft delivery sword head 20 includes a second shell 21, a rotating shaft 22, a gear 23, an auxiliary traction frame 24, a rack 28 and a second spring 25. The rotating shaft 22 is rotatably arranged on the second shell 21, and the rotation axis of the rotating shaft 22 is arranged along the second direction. The gear 23 is coaxially rotatably arranged on the rotating shaft 22. The auxiliary traction frame 24 is spaced apart from the gear 23 and is fixedly connected to the rotating shaft 22. The auxiliary traction frame 24 can pull the weft, and rotate under the drive of the rotating shaft 22, and bend the end of the weft so that the end of the weft is at an angle of 90° with the first direction to face the clamping port. The rack 28 is slidably arranged on the second housing 21 along the first direction, the rack 28 is meshed with the gear 23, a stopper 26 is provided at the bottom end of the rack 28, the stopper 26 passes through the second housing 21 and extends out, a connecting column 27 is provided on the rack 28, one end of the connecting column 27 extends out along the second direction. One end of the second spring 25 is connected to the connecting column 27, and the other end is connected to the second housing 21. The second spring 25 can fix the two positions of the rack 28 respectively after the connecting column 27 moves to both sides of the rotating shaft 22 along the first direction.

[0040] The second housing 21 is provided with a sliding cavity for the rack 28 to slide. The limiting sliding space 12 is provided with a second limiting space 14 for the limiting block 26 to pass through, and the two ends of the second limiting space 14 respectively move the limiting block 26.

[0041] When the second shell 21 moves toward the middle of the screen under the drive of the driving assembly, the auxiliary traction frame 24 will clamp the weft, and at this time the auxiliary traction frame 24 will be in a position where the pitch is rotated upward to the limit. When the limit block 26 below the rack 28 is moved by the first end of the second limit space 14, the rack 28 will move, and at this time it will drive the gear 23 to rotate. The gear 23 drives the auxiliary traction frame 24 to rotate 90° through the rotating shaft 22, so as to bend the end of the weft by 90°, which can just adapt to the clamping opening, and can increase the clamping area of ​​the two clamping arms on the end of the weft, thereby ensuring the handover of the weft. When the second shell 21 moves in the opposite direction, the auxiliary traction frame 24 will be in the extreme position of pitch downward rotation until the limit block 26 is pushed by the other end of the second limit space 14, and then the auxiliary traction frame 24 will be pitched upward by 90° through the rack 28, the gear 23 and the rotating shaft 22 to ensure that the auxiliary traction frame 24 continues to clamp the weft. This structure can prevent the weft and the auxiliary traction frame 24 from sliding and rubbing during the reverse movement of the second shell 21, thereby ensuring the protection of the weft and the final silk screen quality.

[0042] It should be noted that the second limiting space 14 can be formed by a second sub-opening provided on a part of the vertical plate 11 and communicating with the limiting opening. The second limiting space 14 has a certain length, and the two ends of the second limiting space 14 can be two vertical plates 11 without the second sub-opening.

[0043] In this embodiment, a notch can be provided on the second housing 21 to prevent interference between the auxiliary traction frame 24 and the second housing 21 after rotation. In addition, the depth of the notch needs to ensure the limitation of the rotation angle of the auxiliary traction frame 24, ensuring that the auxiliary traction frame 24 only rotates 90°, which can ensure pulling the weft yarn in the first direction, and at the same time bending the end of the weft yarn to 90 degrees to ensure correspondence with the two clamping arms 32.

[0044] In some embodiments, the above-mentioned second spring 25 can adopt the structure as Figure 4 shown. Refer to Figure 4 , the connection point of the second spring 25 and the second housing 21 is arranged at an interval from the gear 23 along the second direction. With this structure of the second spring 25, when the connecting column 27 moves to directly below the rotating shaft 22, the elastic force reaches the maximum, thereby ensuring that the second spring 25 can fix the two positions of the rack 28, ensuring that the auxiliary traction frame 24 can continuously maintain the state of pitching and turning downward during the process of returning to one side of the wire mesh with the second housing 21, preventing the weft yarn from contacting the auxiliary traction frame 24, and further preventing the auxiliary traction frame 24 from wearing the weft yarn and ensuring the quality of the weft yarn.

[0045] In some embodiments, the above-mentioned auxiliary traction frame 24 can adopt the structure as Figure 5 shown. Refer to Figure 5 , the auxiliary traction frame 24 includes a fixed rod 241, a cross bar 242, a vertical rod 243, and a one-way limiting structure 245. One end of the fixed rod 241 is connected to the rotating shaft 22, and the other end extends radially along the rotating shaft 22. The cross bar 242 is perpendicular to the fixed rod 241 and is also perpendicular to the rotating shaft 22. The two ends of the cross bar 242 extend to both sides of the fixed rod 241 respectively. There are two vertical rods 243, and both vertical rods 243 are parallel to the fixed rod 241. One end of each vertical rod 243 is fixedly connected to one end of the cross bar 242, and the other end of each vertical rod 243 is provided with a through port 244 for the weft yarn to pass through, and a wire storage space for the clamping port to enter is formed between the two vertical rods 243. The one-way limiting structure 245 is located in the through port 244 close to the weft receiving sword head 30 and can clamp the weft yarn unidirectionally during the process of the weft feeding sword head 20 feeding the weft.

[0046] The crossbar 242 and the two vertical bars 243 are combined to form a "凵"-shaped structure. As the shaft 22 rotates, the two can bend the weft arranged along the first direction to be arranged along the second direction. This structure can ensure the matching clamping opening, which is convenient for the handover of the weft. In addition, a one-way limiting structure 245 is provided on one of the passing openings 244 to ensure that the weft delivery sword head 20 can directly clamp and fix the end of the weft during the weft delivery process.

[0047] In this embodiment, the one-way limiting structure 245 can be seen in Figure 6 The one-way limiting structure 245 can ensure two spring plates, which are respectively located on the two side walls of the corresponding opening 244. One end of each spring plate is rotatably connected to the corresponding side wall, and the other end is inclined along the first direction to extend toward the middle of the opening 244. The other ends of the two spring plates are pushed by the third spring so that the extended ends of the two spring plates maintain a tendency to move toward the middle of the through hole. This one-way limiting structure 245 can clamp the end of the weft when the weft-feeding sword head 20 moves to the middle position of the wire mesh, and can freely slide relative to the weft when moving in the opposite direction. In addition, this structure can also ensure that when the weft-receiving sword head 30 pulls the weft along the first direction, the weft is easily pulled out of the opening 244.

[0048] In some embodiments, each of the above-mentioned driving components 40 may include a fixed box, a sword belt wheel, a sword belt and a driver. The fixed box is fixed on the swing frame 10, the sword belt wheel is arranged in the fixed box, and the sword belt is wound on the sword belt wheel. The extended end of the sword belt is connected to the weft sending sword head 20 or the weft receiving sword head 30. With the drive of the driver, the sword belt wheel rotates to drive the sword belt, thereby realizing the reciprocating movement of the weft sending sword head 20 or the weft receiving sword head 30. The driver may be a servo motor.

[0049] The driving component in this embodiment can directly adopt the existing technology, which will not be described in detail here.

[0050] Based on the same inventive concept, an embodiment of the present application also provides a wire mesh weaving machine having the above-mentioned weft threading mechanism.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Weft insertion mechanism, characterized in that, Comprising: A swing frame, which is rotatably arranged on the frame of the wire mesh weaving machine and pivots up and down along with the beating-up mechanism; the top end of the swing frame has a limiting sliding space arranged along the width direction of the wire mesh; the length direction of the limiting sliding space is set as the first direction, and the width direction of the limiting sliding space is set as the second direction; A weft supply sword head, which is slidably arranged in the limiting sliding space and is used for clamping and pulling the weft yarn released from the weft accumulator; A weft receiving sword head, which is slidably arranged in the limiting sliding space, and the weft receiving sword head has a clamping opening arranged towards the width direction of the wire mesh and is used for extending into the weft supply sword head and clamping the weft yarn; the weft receiving sword head includes a first housing, clamping arms, connecting rods, a lever and a first spring; there are two clamping arms, and both clamping arms are rotatably arranged on the first housing, and the rotation direction is along the radial direction of the swing frame. Each clamping arm is provided with a fixed protruding rod, and each fixed protruding rod forms an angle with the corresponding clamping arm, and the clamping opening is formed between the two clamping arms; there are two connecting rods, and the two connecting rods are arranged corresponding to the two fixed protruding rods one by one. One end of each connecting rod is respectively hinged to the corresponding fixed protruding rod; And A driving assembly, there are two driving assemblies, and the two driving assemblies are respectively arranged on the swing frame and are located on both sides of the swing frame along the width direction of the wire mesh, and are used for respectively driving the weft supply sword head and the weft receiving sword head to move relatively or move away from each other; Wherein, the weft supply sword head includes a second housing, a rotating shaft, a gear, an auxiliary pulling frame, a rack and a second spring; the rotating shaft is rotatably arranged on the second housing, and the rotation axis of the rotating shaft is arranged along the second direction; the gear is coaxially rotatably arranged on the rotating shaft; the auxiliary pulling frame is arranged at an interval from the gear and is fixedly connected to the rotating shaft. The auxiliary pulling frame is used for pulling the weft yarn, and rotates under the drive of the rotating shaft and bends the end of the weft yarn so that the end of the weft yarn forms a 90° angle with the first direction and faces the clamping opening; the rack is slidably arranged on the second housing along the first direction, the rack meshes with the gear, a limiting block is arranged at the bottom end of the rack, the limiting block passes through the second housing and protrudes, and a connecting column is arranged on the rack, and one end of the connecting column extends along the second direction; one end of the second spring is connected to the connecting column, and the other end is connected to the second housing. The second spring is used for fixing the two positions of the rack respectively after the connecting column moves to both sides of the rotating shaft along the first direction.

2. The weft insertion mechanism according to claim 1, wherein A plurality of vertical plates are arranged at the top end of the swing frame, and each vertical plate is arranged along the vertical direction and is spaced along the width direction of the wire mesh. Each vertical plate is provided with a limiting opening, and the limiting openings are combined to form the limiting sliding space.

3. The weft inserting mechanism according to claim 2, characterized in that, The lever is rotatably arranged on the first housing, and the rotation axis is arranged along the radial direction of the swing frame. The lever has a first end and a second end, and the rotation point of the lever and the first housing is set as a first transfer point, and the first transfer point is located between the first end and the second end of the lever, and the first end of the lever is coaxially hinged with the second ends of the two connecting rods, and the second end of the lever extends out of the first housing. The lever is used to pull each of the fixed extension rods through each of the connecting rods to open the two clamping arms, or to pull each of the fixed extension rods through each of the connecting rods to close the two clamping arms after the second end of the lever is toggled. One end of the first spring is connected to the first housing, and the other end is connected to the first end of the lever, and the first spring is used to fix the two positions where the first end of the lever is located after the first end of the lever moves to both sides of the first transfer point along the first direction; Wherein, a first limiting space for the second end of the shifting rod to pass through is provided in the limiting sliding space, and along the first direction, two ends of the first limiting space are respectively used to shift the second end of the shifting rod.

4. The weft inserting mechanism according to claim 3, wherein, A connection point between the first spring and the first housing and the first transition point are spaced apart along the second direction.

5. The weft insertion mechanism according to claim 1, characterized in that, A sliding cavity for the rack to slide is provided on the second housing; a second limiting space for the limiting block to pass through is provided in the limiting sliding space, and the two ends of the second limiting space respectively move the limiting block.

6. The weft insertion mechanism according to claim 5, characterized in that, A connection point between the second spring and the second housing is spaced apart from the gear along the second direction.

7. The weft insertion mechanism according to claim 5, characterized in that, The auxiliary traction frame includes a fixed rod, a cross rod, an upright rod and a one-way limiting structure; one end of the fixed rod is connected to the rotating shaft, and the other end extends out along the radial direction of the rotating shaft; the cross rod is arranged perpendicular to the fixed rod, and the cross rod is also arranged perpendicular to the rotating shaft, and the two ends of the cross rod extend to the two sides of the fixed rod respectively; there are two upright rods, and the two upright rods are arranged parallel to the fixed rod, one end of each upright rod is fixedly connected to one end of the cross rod, and the other end of each upright rod is provided with a passing mouth for the weft to pass through, and a wire storage space for the clamping mouth to enter is formed between the two upright rods; the one-way limiting structure is located in the passing mouth arranged near the weft receiving sword head, and is used for unidirectionally clamping the weft during the weft sending sword head sending weft.

8. A wire mesh weaving machine, characterized in that, The invention has a weft threading mechanism as claimed in any one of claims 1 to 7.

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