Weft selecting and laying device of warp knitting machine

Abstract

The invention relates to the field of warp knitting machines, in particular to a warp knitting machine weft selecting and laying device which comprises a weft selecting unit, a weft laying unit and yarn conveying and clamping units, the yarn conveying and clamping units are symmetrically arranged on one side of the weft laying unit, the weft selecting unit is horizontally arranged above the yarn conveying and clamping units on the two sides, and the weft selecting unit comprises a mounting frame. A plurality of line selection frames arranged in the weft selection unit and traction mechanisms on the line selection frames are matched with a line clamping plate limiting mechanism and a line clamping plate mechanism, rapid and accurate selection and switching of multiple yarns are achieved, the weft selection efficiency and accuracy are improved, a trolley assembly in the weft laying unit is in linkage design through a line pressing frame, a line pressing plate and a line clamping mechanism, and the weft laying efficiency is improved. According to the yarn conveying and clamping unit, reliable pressing and clamping of the yarn are achieved, yarn displacement in the weft laying process is avoided, the yarn conveying and clamping unit is matched with an adjustable clamping piece in a chain transmission mode, continuous and stable conveying of the yarn is achieved, and accurate control over the clamping state is achieved through an adjusting assembly and a driving assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of warp knitting machines, in particular to a weft selection and laying device of a warp knitting machine. BACKGROUND

[0002] As an important equipment in the textile industry, the efficiency and reliability of the weft selection and laying device of a warp knitting machine directly affect the weaving quality and production efficiency. The existing weft selection and laying devices of warp knitting machines mostly use mechanical or pneumatic control, which has the problems of complex structure, slow response speed, low weft selection accuracy, easy yarn breakage or unstable clamping, etc. For example, the traditional device is prone to wear of the thread clamping mechanism and inaccurate guidance after multiple high-speed operations, resulting in uneven yarn tension or even yarn breakage. Some other devices cannot realize rapid and accurate switching of multiple yarns due to the backward driving mode, which limits the development of high-speed warp knitting machines. In addition, the existing weft laying unit often lacks effective integrated design of yarn compression and cutting, and is prone to yarn displacement and misplacement during weft laying, affecting the uniformity and aesthetics of the fabric. SUMMARY

[0003] The purpose of the present application is to solve the problems existing in the prior art.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: The weft selection and laying device of the warp knitting machine comprises a weft selection unit, a weft laying unit and a yarn conveying and clamping unit. The yarn conveying and clamping unit is symmetrically arranged on one side of the weft laying unit. The weft selection unit is horizontally arranged above the yarn conveying and clamping units on both sides. The weft selection unit comprises a mounting frame. A thread clamping plate limiting mechanism mounting rod is transversely arranged at the front end of the middle part of the mounting frame body. A plurality of thread clamping plate limiting mechanisms are uniformly arranged on the thread clamping plate limiting mechanism mounting rod along the transverse direction. A plurality of thread selection frames are vertically and slidingly fitted on the thread clamping plate limiting mechanisms. A plurality of thread clamping plate mechanisms are uniformly arranged and mounted on the thread selection frames along the vertical direction. A guide rod is arranged above the thread clamping plate mechanisms on the thread selection frames. An electric cylinder mounting frame is arranged at the top middle part of the mounting frame body. A guide rod fixing plate for fixing the guide rod and a guide rod fixing frame are sequentially arranged on the other side of the mounting frame, which is away from the thread clamping plate limiting mechanism mounting rod. A motor mounting plate is arranged below the electric cylinder mounting frame. First and second guide wheels are symmetrically arranged between the motor mounting plate and the thread clamping plate limiting mechanism mounting rod. The top and bottom ends of the line selection frame plate are respectively connected to an upper traction mechanism and a lower traction mechanism, the upper traction mechanism includes a second servo electric cylinder, the second servo electric cylinders are evenly arranged on the electric cylinder mounting frame, the second servo electric cylinder output end piston rod is assembled and connected to the first steel wire rope, the first steel wire rope is used to be connected to the top of the line selection frame, and the first steel wire rope is pulled and guided by the guide wheel on the second guide wheel rod; The lower traction mechanism includes a servo motor, which is evenly arranged and mounted on the motor mounting plate. The output end of the servo motor is equipped with a winding wheel, on which the second steel wire rope is wound. The second steel wire rope is pulled and guided by the guide wheel on the first guide wheel rod. A slider is provided at the bottom of a side wall of one side of the wire selection frame body, and the slider is vertically slidably matched on the wire clamping and limiting mechanism.

[0005] In addition, a preferred structure is that the yarn cutting frame includes a rotating support rod, the tail end of the rotating support rod is rotatably matched at the end heads on both sides of the mounting frame, a cutting knife mounting plate is installed between the front end rod bodies of the rotating support rods on both sides, a sliding head is provided on the upper surface of the front end of the rotating support rod body, and sliding rods are laterally slidably matched on the sliding heads on both sides, a plurality of yarn cutting mechanisms are uniformly arranged laterally on the upper edge of the sliding rod, and a plurality of yarn guide mechanisms aligned with the yarn cutting mechanisms are uniformly arranged laterally on the upper edge of the cutting knife mounting plate; A first servo electric cylinder is provided on a side wall frame on the front side of the rotating support rod body away from the cutting knife mounting plate, and a piston rod at an output end of the first servo electric cylinder is assembled and connected with the sliding rod; The yarn cutting mechanism includes a blade mounting plate, a blade connecting plate, a first blade, and a second blade. The second blade is mounted on the cutting blade mounting plate. The first blade is rotatably engaged with the second blade. The outer surface of the first blade is connected to the blade connecting plate. The end of the blade connecting plate away from the first blade is rotatably connected to the blade mounting plate. The blade mounting plate is mounted on the sliding rod. The yarn guide mechanism includes mounting blocks, which are all arranged at the bottom of the cutting knife mounting plate. Yarn guide wheels are symmetrically rotated and arranged on both sides of the mounting blocks. The yarn guide wheels are all located at the front side of the yarn cutting mechanism.

[0006] In addition, a preferred structure is that through holes are formed at both ends of the conductor rod body, a spring portion is provided on the front end of the conductor rod body, a wiring opening is provided on the front side of the conductor rod, and the wiring opening is provided on the wire selection frame plate body above the wire clamping plate mechanism; The clamping plate mechanism includes a first clamping plate and a second clamping plate. The tail ends of the first clamping plate and the second clamping plate are superimposed and mounted on the clamping plate mounting plate. The front end of the first clamping plate is provided with a first clamping disk, and a through hole is opened in the middle of the first clamping disk. The second clamping plate front end is provided with a second clamping disc, the second clamping disc is attached to the first clamping disc, a limiting movable column is arranged on the second clamping disc, the limiting movable column is movably arranged in the through hole, and the limiting movable column is extruded by the clamping plate limiting mechanism.

[0007] In addition, preferably, the clamping plate limiting mechanism comprises a limiting plate base, the limiting plate base is mounted on the clamping plate limiting mechanism mounting rod, a support plate body is vertically mounted on the limiting plate base, a clamping plate limiting head is arranged on the top of the support plate body, and the clamping plate limiting head is used for extruding the limiting movable column; The mounting frame is provided with a slide rail frame on one side of the clamping plate limiting mechanism mounting rod, the slide rail frame comprises a slide rail frame connecting plate, a plurality of slide rail mounting plates are uniformly arranged on the slide rail frame connecting plate in the transverse direction, a slide rail is vertically arranged on each slide rail mounting plate, and a sliding block is slidingly fitted on the slide rail.

[0008] In addition, preferably, the weft laying unit comprises a trolley assembly, the trolley assembly is slidingly arranged on the sliding frame, the trolley assembly comprises a trolley frame, the trolley frame is composed of an upper trolley plate and two side trolley plates, the side trolley plates are vertically connected to the two sides of the upper trolley plate, an extrusion rod, a first rotating rod and a second rotating rod are sequentially and rotationally arranged between the two side trolley plates from front to back, a clamping mechanism is arranged on the front side of the extrusion rod between the two side trolley plates, a presser bar is rotationally arranged on the surface of the side trolley plate away from the other side trolley plate, a presser plate is horizontally arranged between the two presser bars, and an extrusion rod swing mechanism is arranged at the two end heads of the extrusion rod. A synchronous belt presser plate is arranged on the middle of the upper trolley plate, a plurality of first rollers are symmetrically and horizontally rotationally arranged on the two sides of the synchronous belt presser plate, second rollers are symmetrically and vertically rotationally arranged at the two side edges of the upper trolley plate, and eccentric wheels are rotationally arranged below the second rollers.

[0009] In addition, preferably, the presser bar comprises a first swing arm, a second swing arm and a rotating arm, the first swing arm is connected to the two end heads of the second rotating rod, the first swing arm is rotationally connected with the second swing arm at the end away from the second rotating rod, the presser plate is arranged between the two end heads of the second swing arm away from the first swing arm, and the presser plate is arranged above the clamping mechanism. The second swing arm is rotationally connected with a rotating arm at the middle, and the rotating arm is rotationally arranged at the two ends of the extrusion rod away from the second swing arm. The clamping mechanism comprises a clamping plate connecting rod, the clamping plate connecting rod is arranged at the middle of the first rotating rod and the second rotating rod, a clamping plate is horizontally arranged at the front side of the clamping plate connecting rod, the two end heads of the clamping plate are connected to the two side trolley plates, and a plurality of clamping assemblies are uniformly arranged in the transverse direction at the bottom of the clamping plate. The thread clamping assembly comprises a pair of thread clamping arms, each of which is rotatably arranged on a thread clamping rotating seat, the thread clamping rotating seat is arranged at the bottom of the thread clamping plate, and a thread clamping spring is arranged between the thread clamping arms on both sides; The front end of the thread clamping arm is provided with a thread clamping end, the tail end of the thread clamping arm is provided with a limiting end, a thread clamping spring is arranged between the limiting ends, and the limiting ends of adjacent thread clamping assemblies are used to be pressed by the pressing rod; A plurality of thread pressing holes are uniformly arranged on the bottom of the front side plate body of the thread pressing plate in the transverse direction, and the thread pressing holes are aligned with the positions of the thread clamping assemblies below.

[0010] In addition, preferably, the pressing rod oscillating mechanism comprises an oscillating frame, a tension spring connecting block, a first tension spring, and a tension spring connecting rod. The tension spring connecting block is connected to the two side ends of the pressing rod body. The tension spring connecting rod is arranged on the surface of the side plate between the first oscillating arm and the pressing rod. The tension spring connecting rod and the tension spring connecting block are connected by the first tension spring. The oscillating frame comprises a first rotating block connected to the two side ends of the pressing rod. A second rotating block is rotatably arranged on the first rotating block. A third rotating block is rotatably connected to the other end of the second rotating block away from the first rotating block. The third rotating block is connected to the two side ends of the first rotating rod. A plurality of pressing columns are arranged on the pressing rod in the transverse direction. The pressing columns are used to press the limiting ends. A first limiting oscillating arm is arranged at one side end of the first rotating rod body. A first limiting roller is rotatably arranged at the side end of the first limiting oscillating arm away from the first rotating rod. A tension spring connecting seat is symmetrically arranged on the rod body of the second rotating rod between the two side plates. A second tension spring is connected to the tension spring connecting seat. One end of the second tension spring away from the tension spring connecting seat is connected to the upper plate.

[0011] In addition, preferably, the yarn conveying and clamping unit comprises a mounting frame body. An upper chain cooperation block is horizontally arranged on one side surface of the mounting frame body. A lower chain cooperation block is arranged below the upper chain cooperation block. A chain assembly is externally sleeved to the upper chain cooperation block and the lower chain cooperation block. The chain assembly comprises a double-row chain slidably fitted to the outer periphery of the upper chain cooperation block and the lower chain cooperation block. A plurality of connecting plates are uniformly arranged on one side surface of the double-row chain. A clamping piece is arranged on the other side surface of the double-row chain away from the connecting plates. An adjusting assembly is arranged below the upper chain cooperation block of the mounting frame body. The adjusting assembly is used to adjust the opening and closing of the clamping piece. A sprocket is rotatably arranged on one side of the mounting frame body. The sprocket is externally tooth-shaped cooperated with the double-row chain. An activity port is through arranged on the mounting frame body between the lower chain cooperation block and the upper chain cooperation block. A driving assembly is arranged below the activity port and on the surface where the adjusting assembly is arranged. The driving assembly is connected with the adjusting assembly. The installation frame body is provided with a broken line detection mechanism at the side surface away from the chain wheel, the broken line detection mechanism comprises a rotating installation frame, the rotating installation frame is arranged on the installation frame body, and the rotating installation frame body is provided with a broken yarn detection infrared probe at the top.

[0012] In addition, preferably, the clamping piece comprises a clamping seat, a rotating cavity is formed in the clamping seat, a clamping block is rotatably arranged in the rotating cavity, and a limiting portion is arranged at the top of the clamping seat and used for abutting against the clamping block. A clamping surface is arranged on one side of the top of the clamping block body close to the limiting portion, a limiting surface is arranged at the bottom of the clamping block body and used for being abutted by the adjusting assembly, torsional springs are arranged on the two sides of the clamping block and abut against the inner wall of the rotating cavity.

[0013] In addition, preferably, the adjusting assembly comprises a first rotating connecting head and a second rotating connecting head, the first rotating connecting head and the second rotating connecting head are arranged between the upper chain cooperation block and the lower chain cooperation block, a connecting rod is movably connected between the first rotating connecting head and the second rotating connecting head, a second push plate is rotatably connected to one end of the first rotating connecting head away from the connecting rod, and a first push plate is rotatably connected to one end of the second rotating connecting head away from the connecting rod. A limiting roller frame is horizontally connected to the first push plate and the second push plate, limiting rollers are uniformly arranged on the limiting roller frame and rotatably arranged in a transverse direction, the limiting rollers are used for being in contact with the limiting surface, a push rod is fixedly connected to the bottom of the second push plate, the push rod is vertically movable at the movable opening, and the push rod is movably connected with the driving assembly at the bottom. The driving assembly comprises a third servo cylinder, the third servo cylinder is arranged below the movable opening, a piston rod is movably arranged at the top output end of the third servo cylinder, and the top end of the piston rod is connected with the push rod.

[0014] The yarn selection and cutting device has the following beneficial effects: 1. The multiple yarn selection and cutting device has the following beneficial effects: the multiple yarn selection and cutting device comprises a yarn selection unit, a yarn laying unit, a yarn conveying and clamping unit and a yarn cutting frame, the yarn selection unit comprises a plurality of yarn selection frames and traction mechanisms arranged on the yarn selection frames, the yarn selection unit is connected with the yarn laying unit through a yarn conveying and clamping unit, the yarn selection unit is connected with the yarn cutting frame through a yarn conveying and clamping unit, the yarn selection unit is connected with the yarn conveying and clamping unit through a yarn conveying and clamping unit, and the yarn selection unit is connected with the yarn cutting frame through a yarn conveying and clamping unit.

[0015] 2. The multiple yarn selection and cutting device has the following beneficial effects: the trolley assembly in the yarn laying unit is connected with the yarn clamping mechanism through the pressing frame and the pressing plate, the yarn clamping mechanism is connected with the yarn clamping mechanism through the pressing frame and the pressing plate, the yarn clamping mechanism is connected with the yarn clamping mechanism through the pressing frame and the pressing plate, and the yarn clamping mechanism is connected with the yarn clamping mechanism through the pressing frame and the pressing plate.

[0016] 3. The multiple yarn selection and cutting device has the following beneficial effects: the yarn conveying and clamping unit adopts a chain transmission mechanism and an adjustable clamping piece, the yarn conveying and clamping unit is connected with the yarn clamping mechanism through the chain transmission mechanism and the adjustable clamping piece, the yarn conveying and clamping unit is connected with the yarn clamping mechanism through the chain transmission mechanism and the adjustable clamping piece, the yarn conveying and clamping unit is connected with the yarn clamping mechanism through the chain transmission mechanism and the adjustable clamping piece, and the yarn conveying and clamping unit is connected with the yarn clamping mechanism through the chain transmission mechanism and the adjustable clamping piece.

[0017] 4. The multiple yarn selection and cutting device has the following beneficial effects: the yarn cutting frame is connected with the yarn cutting mechanism through the first servo cylinder, the yarn cutting frame is connected with the yarn cutting mechanism through the first servo cylinder, the yarn cutting frame is connected with the yarn cutting mechanism through the first servo cylinder, and the yarn cutting frame is connected with the yarn cutting mechanism through the first servo cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Structure diagram of the position relationship of the weft selection unit, the weft laying unit and the yarn conveying and clamping unit; Figure 2 Structure diagram of the weft selection unit as a whole; Figure 3 Structure diagram of the mounting frame; Figure 4 Structure diagram of the mounting frame in partial enlargement; Figure 5 Structure diagram of the position of the guide rod fixing frame; Figure 6 Structure diagram of the clamping plate limiting mechanism; Figure 7 Structure diagram of the upper traction mechanism; Figure 8 Structure diagram of the weft selection frame and the clamping plate limiting mechanism after being split; Figure 9 Structure diagram of the slide rail frame; Figure 10 Structure diagram of the weft selection frame; Figure 11 Structure diagram of the clamping plate mechanism after being split; Figure 12 Structure diagram of the yarn cutting frame; Figure 13 Structure diagram of the yarn guiding mechanism; Figure 14 Structure diagram of the yarn cutting mechanism; Figure 15 Structure diagram of the weft selection and laying trolley as a whole; Figure 16 Structure diagram of the weft selection and laying trolley mounted on the sliding frame; Figure 17 Structure diagram of the clamping mechanism; Figure 18 Structure diagram of the trolley frame; Figure 19 Structure diagram of the presser bar frame; Figure 20 Structure diagram of the presser plate; Figure 21 Structure diagram of the extrusion rod swinging mechanism; Figure 22 Structure diagram of the second rotating rod; Figure 23 Structure diagram of the swinging frame; Figure 24 Structure diagram of the clamping assembly; Figure 25 Structure diagram of the whole clamping mechanism; Figure 26 Structure diagram of the mounting frame body; Figure 27 Structure diagram of the mounting frame body in partial enlargement; Figure 28 Structure diagram of the adjusting assembly; Figure 29 Structure diagram of the chain assembly and the clamping piece after being separated; Figure 30 Structure diagram of the clamping piece.

[0019] 001, weft selection unit; 002, weft laying unit; 003, yarn conveying and clamping unit; 0021, sliding frame; 0022, synchronous belt assembly; 0023, trolley assembly; 0024, limiting top block; 004, trolley frame; 0041, upper trolley plate; 0042, side trolley plate; 0043, synchronous belt pressing plate; 0044, first roller; 0045, second roller; 0046, eccentric wheel; 005, pressing frame; 0051, first swing arm; 0052, second swing arm; 0053, rotating arm; 006, pressing plate; 0061, pressing hole; 007, extrusion rod swing mechanism; 0071, swing frame; 00711, first rotating block; 00712, second rotating block; 00713, third rotating block; 0072, tension spring connecting block; 0073, first tension spring; 0074, tension spring connecting rod; 008, thread clamping mechanism; 0081, clamping plate connecting rod; 0082, clamping plate; 0083, clamping assembly; 00831, clamping rotating seat; 00832, clamping arm; 008321, clamping end; 008322, limiting end; 00833, clamping spring; 009, extrusion rod; 0091, extrusion column; 0010, first rotating rod; 00101, first limiting swing arm; 00102, first limiting roller; 0011, second rotating rod; 00111, second limiting swing arm; 00112, second limiting roller; 00113, tension spring connecting seat; 00114, second tension spring; 01, mounting frame; 011, clamping plate limiting mechanism mounting rod; 012, motor mounting plate; 013, first guide wheel rod; 014, second guide wheel rod; 015, electric cylinder mounting frame; 016, wire rod fixing frame; 017, wire rod fixing plate; 018, slide rail frame; 0181, slide rail frame connecting plate; 0182, slide rail mounting plate; 0183, slide rail; 02, mounting frame body; 021, movable opening; 03, sprocket; 04, lower chain matching block; 05, clamping piece; 051, clamping seat; 0511, rotating cavity; 0512, limiting portion; 052, clamping block; 0521, limiting surface; 0522, clamping surface; 053, torsional spring; 06, driving assembly; 061, third servo electric cylinder; 062, piston rod; 07, chain assembly; 071, double-row chain; 072, connecting plate; 08, adjusting assembly; 081, push rod; 082, first rotating connecting head; 083, connecting rod; 084, second rotating connecting head; 085, first push plate; 086, second push plate; 087, limiting roller frame; 088, limiting roller; 09, upper chain matching block; 010, thread breakage detection mechanism; 0101, rotating mounting frame; 0102, yarn breakage detection infrared probe; 1, clamping plate limiting mechanism; 11, limiting plate base; 12, support plate body; 13, clamping plate limiting head; 2, yarn cutting frame; 21, rotating support rod; 22, sliding head; 23, sliding rod; 24, cutting knife mounting plate; 25, yarn guiding mechanism; 251, mounting block; 252, yarn guide wheel;26, yarn cutting mechanism; 261, blade mounting plate; 262, blade connecting plate; 263, first blade; 264, second blade; 27, first servo cylinder; 3, wire selection frame; 31, sliding block; 4, thread clamping plate mechanism; 41, first thread clamping plate; 42, first clamping disc; 43, through hole; 44, second thread clamping plate; 45, second clamping disc; 46, limit movable column; 5, wire guide rod; 51, wire outlet; 52, spring part; 6, upper traction mechanism; 61, second servo cylinder; 62, first steel wire rope; 7, lower traction mechanism; 71, servo motor; 72, winding wheel; 73, second steel wire rope. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0021] Reference Figures 1-30 The weft selection and laying device of the warp knitting machine comprises a weft selection unit 001, a weft laying unit 002 and a yarn conveying and clamping unit 003. The weft laying unit 002 is symmetrically provided with the yarn conveying and clamping unit 003 on one side. The weft selection unit 001 is horizontally arranged above the yarn conveying and clamping units 003 on both sides. The weft selection unit 001 comprises a mounting frame 01. A thread clamping plate limiting mechanism mounting rod 011 is transversely arranged at the middle part of the front end of the frame body of the mounting frame 01. A plurality of thread clamping plate limiting mechanisms 1 are uniformly arranged on the thread clamping plate limiting mechanism mounting rod 011 in the transverse direction. A plurality of wire selection frames 3 are vertically and slidingly fitted on the thread clamping plate limiting mechanisms 1. A plurality of thread clamping plate mechanisms 4 are uniformly arranged and mounted on the wire selection frames 3 in the vertical direction. A wire guide rod 5 is arranged above the thread clamping plate mechanisms 4 on the wire selection frames 3, and the wire guide rod 5 is used for protecting the yarn.

[0022] The weft selection and laying device of the warp knitting machine comprises a weft selection unit 001, a weft laying unit 002 and a yarn conveying and clamping unit 003. The weft laying unit 002 is symmetrically provided with the yarn conveying and clamping unit 003 on one side. The weft selection unit 001 is horizontally arranged above the yarn conveying and clamping units 003 on both sides. The weft selection unit 001 comprises a mounting frame 01. A thread clamping plate limiting mechanism mounting rod 011 is transversely arranged at the middle part of the front end of the frame body of the mounting frame 01. A plurality of thread clamping plate limiting mechanisms 1 are uniformly arranged on the thread clamping plate limiting mechanism mounting rod 011 in the transverse direction. A plurality of wire selection frames 3 are vertically and slidingly fitted on the thread clamping plate limiting mechanisms 1. A plurality of thread clamping plate mechanisms 4 are uniformly arranged and mounted on the wire selection frames 3 in the vertical direction. A wire guide rod 5 is arranged above the thread clamping plate mechanisms 4 on the wire selection frames 3, and the wire guide rod 5 is used for protecting the yarn.

[0023] Moreover, the top end and the bottom end of the plate body of the line selection frame 3 are respectively connected with an upper traction mechanism 6 and a lower traction mechanism 7. The upper traction mechanism 6 comprises second servo cylinders 61 which are uniformly arranged on a cylinder mounting frame 015. The output end piston rod of each second servo cylinder 61 is assembled and connected with a first steel wire rope 62. The first steel wire rope 62 is used to be connected at the top end of the line selection frame 3, and the first steel wire rope 62 is guided by the guide wheels on the second guide wheel rod 014. The lower traction mechanism 7 comprises servo motors 71 which are uniformly arranged on a motor mounting plate 012. The output end of each servo motor 71 is assembled and arranged with a winding wheel 72. The winding wheel 72 winds a second steel wire rope 73. The second steel wire rope 73 is guided by the guide wheels on the first guide wheel rod 013. The line selection frame 3 is provided with a sliding block 31 at the bottom of the side wall on one side of the frame body. The sliding block 31 is vertically slidingly fitted on the thread clamping and limiting mechanism 1. The sliding block 31 is used to ensure the linear movement of the line selection frame 3.

[0024] Moreover, the yarn cutting frame 2 comprises rotating support rods 21 which are rotatably fitted at the two side ends of the mounting frame 01. A cutting knife mounting plate 24 is mounted between the front end rod bodies of the two rotating support rods 21. A sliding head 22 is arranged on the upper surface of the front end of the rod body of each rotating support rod 21. A sliding rod 23 is slidingly fitted on the two sliding heads 22. A plurality of yarn cutting mechanisms 26 are uniformly arranged on the sliding rod 23 in the transverse direction. A plurality of yarn guide mechanisms 25 are uniformly arranged on the cutting knife mounting plate 24 in the transverse direction and are aligned with the yarn cutting mechanisms 26. A first servo cylinder 27 is arranged on the side wall of the rod body of one rotating support rod 21 which is away from the cutting knife mounting plate 24. The output end piston rod of the first servo cylinder 27 is assembled and connected with the sliding rod 23. The sliding rod 23 is used to drive the first blade 263 to cut.

[0025] Meanwhile, the yarn cutting mechanism 26 comprises a blade mounting plate 261, a blade connecting plate 262, a first blade 263 and a second blade 264. The second blade 264 is mounted on the cutting knife mounting plate 24. The first blade 263 is rotatably fitted on the second blade 264. The outer side surface of the first blade 263 is connected with the blade connecting plate 262. One end of the blade connecting plate 262 which is away from the first blade 264 is rotatably connected with the blade mounting plate 261. The blade mounting plate 261 is mounted on the sliding rod 23. The yarn guide mechanism 25 comprises mounting blocks 251 which are arranged at the bottom of the cutting knife mounting plate 24. Yarn guide wheels 252 are symmetrically and rotatably arranged on the two sides of each mounting block 251. The yarn guide wheels 252 are located in front of the yarn cutting mechanism 26. The yarn guide wheels 252 are used to guide the yarn.

[0026] Meanwhile, the lead wire rod 5 is provided with a through hole at both ends of the rod body, a spring part 52 is arranged on the front end of the rod body of the lead wire rod 5, and a wire running port 51 is arranged on the front side of the lead wire rod 5. The wire running port 51 is arranged on the plate body of the wire selection frame 3 and is located above the wire clamping plate mechanism 4. The wire clamping plate mechanism 4 comprises a first wire clamping plate 41 and a second wire clamping plate 44. The tail ends of the first wire clamping plate 41 and the second wire clamping plate 44 are stacked and arranged on the wire clamping plate mounting plate 32. The front end of the first wire clamping plate 41 is provided with a first clamping disc 42. A through hole 43 is arranged in the middle of the first clamping disc 42. The front end of the second wire clamping plate 44 is provided with a second clamping disc 45. The second clamping disc 45 is attached to the first clamping disc 42. A limiting movable column 46 is arranged on the second clamping disc 45. The limiting movable column 46 is movably arranged at the through hole 43 and is extruded by the wire clamping plate limiting mechanism 1.

[0027] In addition, the wire clamping plate limiting mechanism 1 comprises a limiting plate base 11. The limiting plate base 11 is arranged on the wire clamping plate limiting mechanism mounting rod 011. A supporting plate body 12 is vertically arranged on the limiting plate base 11. A wire clamping plate limiting head 13 is arranged on the top of the supporting plate body 12. The wire clamping plate limiting head 13 is used to extrude the limiting movable column 46. The mounting frame 01 is arranged on one side of the wire clamping plate limiting mechanism mounting rod 011 and is provided with a sliding rail frame 018. The sliding rail frame 018 comprises a sliding rail frame connecting plate 0181. A plurality of sliding rail mounting plates 0182 are uniformly arranged on the sliding rail frame connecting plate 0181 in the transverse direction. A sliding rail 0183 is vertically arranged on each of the sliding rail mounting plates 0182. The sliding block 31 is slidingly arranged on the sliding rail 0183.

[0028] Meanwhile, the weft laying unit 002 comprises a trolley assembly 0023. The trolley assembly 0023 is slidingly arranged on the sliding frame 0021. The trolley assembly 0023 comprises a trolley frame 004. The trolley frame 004 is composed of an upper trolley plate 0041 and two side trolley plates 0042. The side trolley plates 0042 are vertically connected to the two sides of the upper trolley plate 0041. A pressing rod 009, a first rotating rod 0010, and a second rotating rod 0011 are sequentially arranged from front to back between the two side trolley plates 0042. A wire clamping mechanism 008 is arranged on the front side of the pressing rod 009 between the two side trolley plates 0042. A pressing plate 006 is horizontally arranged between the two pressing rods 005. A pressing rod oscillating mechanism 007 is arranged at the two end heads of the pressing rod 009.

[0029] The upper plate 0041 is provided with a synchronous belt pressing plate 0043 in the middle of the upper surface, a plurality of first rollers 0044 are symmetrically arranged on the two sides of the synchronous belt pressing plate 0043 and horizontally rotate, a plurality of second rollers 0045 are symmetrically arranged on the two sides of the upper plate 0041 and vertically rotate, eccentric wheels 0046 are arranged below the second rollers 0045 and rotate, and the synchronous belt assembly 0022 is driven by the motor at one end of the sliding frame 0021 and transmits power through the synchronous belt on the driving wheel and the driven wheel of the sliding frame 0021.

[0030] In addition, the thread pressing frame 005 comprises a first swing arm 0051, a second swing arm 0052 and a rotating arm 0053, the first swing arm 0051 is connected to the two ends of the second rotating rod 0011, the second swing arm 0052 is rotatably connected to the end of the first swing arm 0051 away from the second rotating rod 0011, the thread pressing plate 006 is arranged between the two ends of the second swing arm 0052 away from the first swing arm 0051, the thread pressing plate 006 is arranged above the thread clamping mechanism 008, the rotating arm 0053 is rotatably connected to the middle of the second swing arm 0052, and the two ends of the rotating arm 0053 are rotatably arranged on the two ends of the extrusion rod 009.

[0031] Meanwhile, the thread clamping mechanism 008 comprises a thread clamping plate connecting rod 0081, the thread clamping plate connecting rod 0081 is arranged in the middle of the first rotating rod 0010 and the second rotating rod 0011, the thread clamping plate 0082 is horizontally arranged on the front side of the thread clamping plate connecting rod 0081, the two ends of the thread clamping plate 0082 are connected to the two sides of the side plate 0042, and a plurality of thread clamping assemblies 0083 are uniformly arranged on the bottom of the thread clamping plate 0082 in the transverse direction. The thread clamping assembly 0083 comprises a pair of thread clamping arms 00832, the thread clamping arms 00832 are rotatably arranged on the thread clamping rotating seat 00831, the thread clamping rotating seat 00831 is arranged on the bottom of the thread clamping plate 0082, and the thread clamping spring 00833 is arranged between the two thread clamping arms 00832. Meanwhile, the thread clamping arm 00832 is provided with a thread clamping end 008321 at the front end, the thread clamping arm 00832 is provided with a limiting end 008322 at the tail end, the thread clamping spring 00833 is arranged between the limiting ends 008322 of the adjacent thread clamping assemblies 0083, the limiting ends 008322 of the adjacent thread clamping assemblies 0083 are used to be pressed by the extrusion rod 009, a plurality of thread pressing holes 0061 are uniformly arranged on the bottom of the front plate body of the thread pressing plate 006 in the transverse direction, the thread pressing holes 0061 are aligned with the thread clamping assemblies 0083 below, and the thread pressing holes 0061 are used to press the yarn downward, so that the thread clamping arms 00832 can clamp the yarn Moreover, the extrusion rod oscillation mechanism 007 comprises an oscillation frame 0071, a pull spring connecting block 0072, a first pull spring 0073, and a pull spring connecting rod 0074. The pull spring connecting block 0072 is connected to the two side ends of the rod body of the extrusion rod 009. The pull spring connecting rod 0074 is arranged on the surface of the side plate 0042 between the first swing arm 0051 and the extrusion rod 009. The pull spring connecting rod 0074 is connected to the pull spring connecting block 0072 through the first pull spring 0073. The oscillation frame 0071 comprises a first rotating block 00711 connected to the two side ends of the extrusion rod 009. The first rotating block 00711 is rotatably provided with a second rotating block 00712. The other end of the second rotating block 00712 away from the first rotating block 00711 is rotatably connected with a third rotating block 00713. The third rotating block 00713 is connected to the two side ends of the first rotating rod 0010. The first pull spring 0073 is used to reset the rotating extrusion rod 009.

[0032] In addition, a plurality of extrusion columns 0091 are arranged on the extrusion rod 009 in a transverse and uniform manner. The extrusion columns 0091 are used to extrude the limiting end 5322. A first limiting swing arm 00101 is arranged at one side end of the rod body of the first rotating rod 0010. The first limiting swing arm 00101 is rotatably provided with a first limiting roller 00102 at the side end away from the first rotating rod 0010. A pull spring connecting seat 00113 is symmetrically arranged on the rod body between the two side plates 0042 of the second rotating rod 0011. A second pull spring 00114 is connected to the pull spring connecting seat 00113. One end of the second pull spring 00114 away from the pull spring connecting seat 00113 is connected to the upper plate 0041. The second pull spring 00114 enables the second rotating rod 0011 to reset.

[0033] In addition, the yarn conveying and clamping unit 003 comprises a mounting frame body 02. An upper chain cooperation block 09 is horizontally arranged at the top of one side surface of the mounting frame body 02. A lower chain cooperation block 04 is arranged below the upper chain cooperation block 09. A chain assembly 07 is externally sleeved with the upper chain cooperation block 09 and the lower chain cooperation block 04. The chain assembly 07 comprises a double-row chain 071 slidably cooperating with the outer periphery of the upper chain cooperation block 009 and the lower chain cooperation block 04. A plurality of connecting plates 072 are uniformly arranged at one side surface of the double-row chain 071. A clamping piece 05 is arranged at the other side surface of the double-row chain 071 away from the connecting plate 072. An adjusting assembly 08 is arranged below the upper chain cooperation block 009 of the mounting frame body 02. The adjusting assembly 08 is used to adjust the opening and closing of the clamping piece 05.

[0034] Moreover, the mounting rack body 02 is rotatably provided with a chain wheel 03 on one side of the adjusting assembly 08, the chain wheel 03 is externally toothed with a double-row chain 071, the mounting rack body 02 is provided with a movable opening 021 between the lower chain matching block 04 and the upper chain matching block 09, the mounting rack body 02 is provided with a driving assembly 06 below the movable opening 021 and on the surface where the adjusting assembly 08 is mounted, the driving assembly 06 is connected with the adjusting assembly 08, and the driving assembly 06 realizes the opening of the clamping piece 05. The mounting rack body 02 is provided with a broken line detection mechanism 010 on the surface away from the chain wheel 03, the broken line detection mechanism 010 comprises a rotating mounting rack 0101 provided on the mounting rack body 02, and the rotating mounting rack 0101 is provided with a broken yarn detection infrared probe 0102 on the top of the body, which is used for detecting whether the yarn is broken.

[0035] Meanwhile, the clamping piece 05 comprises a clamping seat 051, the clamping seat 051 is provided with a rotating cavity 0511, the rotating cavity 0511 is rotatably provided with a clamping block 052, the top of the clamping seat 051 is provided with a limiting portion 0512, the limiting portion 0512 is used for abutting against the clamping block 052, one side of the top of the clamping block 052 close to the limiting portion 0512 is provided with a clamping surface 0522, the bottom of the clamping block 052 is provided with a limiting surface 0521, the limiting surface 0521 is used for being abutted by the adjusting assembly 08, and the clamping block 052 is provided with a torsional spring 053 on both sides, the torsional spring 053 abuts against the inner wall of the rotating cavity 0511, and the limiting portion 0512 cooperates with the clamping surface 0522 to clamp the yarn of the warp knitting machine.

[0036] The adjusting assembly 08 comprises a first rotating connecting head 082 and a second rotating connecting head 084, the first rotating connecting head 082 and the second rotating connecting head 084 are arranged between the upper chain matching block 09 and the lower chain matching block 04, a connecting rod 083 is movably connected between the first rotating connecting head 082 and the second rotating connecting head 084, a second push plate 086 is rotatably connected to one end of the first rotating connecting head 082 away from the connecting rod 083, a first push plate 085 is rotatably connected to one end of the second rotating connecting head 084 away from the connecting rod 083, a limiting roller frame 087 is horizontally connected to the first push plate 085 and the second push plate 086, limiting rollers 088 are rotatably arranged on the limiting roller frame 087 in a uniform manner along the transverse direction, the limiting rollers 088 are used for contacting the limiting surface 0521, a push rod 081 is fixedly connected to the bottom of the second push plate 086, the push rod 081 is vertically movable at the movable opening 021, the push rod 081 is connected with the driving assembly 06 at the bottom, and the push rod 081 is used for driving the first rotating connecting head 082 to rotate clockwise upward.

[0037] Meanwhile, the driving assembly 06 comprises a third servo cylinder 061 arranged below the movable port 021, and a piston rod 062 is arranged on the top output end of the third servo cylinder 061, and the top end of the piston rod 062 is connected with the push rod 081, so that the piston rod 062 can drive the push rod 081 to move linearly and reciprocally.

[0038] In this embodiment, when one of the yarns needs to be selected to pass through the wire rod 5 of the wire selection frame 3, the yarn is drawn out by the weft laying unit 002 and placed on the yarn conveying and clamping unit 003 to be conveyed to the warp knitting machine. First, the height of the wire selection frame 3 is adjusted by the top traction mechanism 6, the first steel wire rope 62 is pulled by the second servo cylinder 61, so that the sliding block 31 moves vertically upward on the sliding rail 0183, the servo motor 71 of the lower traction mechanism 7 winds the second steel wire rope 73 through the winding wheel 72, so that the sliding block 31 moves vertically downward on the sliding rail 0183, the limiting movable column 46 at different positions is in contact with the clamping plate limiting head 13, so that the clamping plate limiting head 13 extrudes the limiting movable column 46, the limiting movable column 46 moves in the through hole 43, the second clamping disc 44 elastically deforms, the second clamping disc 44 is opened, so that the first clamping disc 42 and the second clamping disc 45 that are originally attached together are separated, and the yarn passing through the wire port 51 is no longer clamped after the first clamping disc 42 and the second clamping disc 45 are separated, at this time, the yarn can be drawn out by the trolley assembly 0023.

[0039] When the yarn is clamped and guided by the yarn guide wheel 252, first, the first limiting swing arm 00101 is rotated, so as to drive the first rotating rod 0010 to rotate, the third rotating block 00713 rotates through the second rotating block 00712 to press the first rotating block 411 to rotate, so as to make the extrusion rod 009 rotate, the extrusion column 0091 swings forward, the extrusion column 0091 extrudes the limiting ends 008322 on both sides, so that the front clamping end 008321 of the clamping arm 00832 that is originally closed is opened, and the clamping spring 00833 is retracted.

[0040] Meanwhile, the first tension spring 0073 is deformed by the tension spring connecting block 0072.

[0041] When the first limiting swing arm 00101 is rotated, the second limiting roller 00112 contacts the upper surface of the limiting block 0024 on one side of the sliding frame 0021, and the limiting block 0024 abuts against the second limiting roller 00112 to make the second limiting swing arm 00111 rotate, so that the second rotating rod 0011 rotates, the first swing arm 0051 is deflected forward, and under the cooperation of the rotating arm 0053, the second swing arm 0052 on both sides pushes the pressing plate 006 downward, the pressing hole 0061 presses the yarn, so that the yarn is clamped by the clamping end 008321, and when the second rotating rod 0011 rotates, the second rotating rod 0011 rotates to drive the pull spring connecting seat 00113 to rotate, and the pull spring connecting seat 00113 pulls the second pull spring 00114.

[0042] When the first limiting swing arm 00101 and the second limiting swing arm 00111 are no longer limited, the first pull spring 0073 and the second pull spring 00114 release the elastic potential energy to reset, so that the second rotating rod 0011 and the first rotating rod 0010 are reset, the pressing plate 006 is reset and no longer presses the yarn, the extrusion column 0091 no longer extrudes the limiting end 008322, the clamping arm 00832 is closed to clamp the yarn, at this time the trolley displacement pulls out the yarn, and after the yarn is placed on the yarn conveying and clamping unit 003, the yarn is loosened by swinging the first limiting swing arm 00101 and the second limiting swing arm 00111.

[0043] When the conveying yarn is clamped and sent to the warp knitting machine, first, the third servo cylinder 061 controls the piston rod 062 to extend, the piston rod 062 drives the push rod 081 to go up, so that the first rotating connector 082 rotates clockwise, the connecting rod 083 connected at the bottom rotates horizontally, the second rotating connector 084 on the other side is driven to move, the second rotating connector 084 rotates clockwise, and the first rotating connector 082 and the second rotating connector 084 rotate clockwise synchronously, so that the first push plate 085 and the second push plate 086 are synchronously pushed up, and the limiting roller frame 087 connected thereto is horizontally lifted.

[0044] When the limiting roller frame 087 moves up, the limiting roller 088 is pushed up, the top of the limiting roller 088 contacts the limiting surface 0521, and as the limiting roller 088 continues to push up, the clamping block 052 rotates in the rotating cavity 0511, the torsional spring 053 is twisted and contracted, so that the limiting part 0512 and the clamping surface 0522 are opened, facilitating the placement of the yarn, after the yarn is placed between the limiting part 0512 and the clamping surface 0522, the third servo cylinder 061 controls the piston rod 062 to retract, so that the limiting roller frame 087 descends and no longer pushes against the limiting surface 0521, the torsional spring 053 releases the elastic potential energy, so that the clamping surface 0522 presses on the limiting part 0512 to clamp the yarn, and then the clamping part 05 with the yarn is driven to the front side of the warp knitting machine for knitting by the transmission of the double-row chain 071.

[0045] And after the yarn is fixed by the clamping part 05, when cutting is needed, the second servo cylinder 27 piston rod is extended to realize the sliding of the sliding rod 23 on the sliding head 22, when the sliding rod 23 is extended, the blade mounting plate 261 is transversely moved, thereby driving the rotating connecting blade connecting plate 262 to move synchronously, thereby rotating the first blade 263 to be buckled with the second blade 264 to cut the yarn.

[0046] In the present application, the multiple yarn selection and switching are realized quickly and accurately by the multiple thread selection frames 3 and the traction mechanisms 6 arranged in the weft selection unit 001, the weft selection efficiency and accuracy are improved by cooperating with the thread clamping plate limiting mechanism 1 and the thread clamping plate mechanism 4. The reliable pressing and clamping of the yarn are realized by the linkage design of the thread pressing frame 005, the thread pressing plate 006 and the clamping mechanism 008 of the weft laying unit 002, and the yarn displacement in the weft laying process is avoided. The continuous and stable yarn conveying is realized by the chain transmission and the adjustable clamping part 05 of the yarn conveying and clamping unit 003, and the accurate control of the clamping state is realized by the adjusting assembly 08 and the driving assembly 06. The quick and neat cutting of the yarn is realized by the first servo cylinder 27 driving the sliding rod 23 and the cutting mechanism 26 of the yarn cutting frame 2, and the production continuity and the automation degree are improved.

[0047] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A weft selection and laying device for a warp knitting machine, comprising a weft selection unit (001), a weft laying unit (002), and a yarn conveying and clamping unit (003), the weft laying unit (002) being symmetrically provided with the yarn conveying and clamping unit (003) on one side, and the weft selection unit (001) being horizontally arranged above the yarn conveying and clamping units (003) on both sides, characterized in that, The weft selection unit (001) comprises a mounting frame (01), a clamping plate limiting mechanism mounting rod (011) is arranged at the front end of the middle part of the mounting frame (01) in the transverse direction, a plurality of clamping plate limiting mechanisms (1) are uniformly arranged on the clamping plate limiting mechanism mounting rod (011) in the transverse direction, a plurality of line selection frames (3) are vertically slidably arranged on the clamping plate limiting mechanism (1), a plurality of clamping plate mechanisms (4) are uniformly arranged on the line selection frame (3) in the vertical direction, and a wire rod (5) is arranged above the clamping plate mechanism (4) on the line selection frame (3); The top middle part of the mounting frame (01) is provided with an electric cylinder mounting frame (015), and a wire rod fixing plate (017) for fixing the wire rod (5) and a wire rod fixing frame (016) are sequentially arranged on the other side of the mounting frame (01) away from the clamping plate limiting mechanism mounting rod (011) of the electric cylinder mounting frame (015); a motor mounting plate (012) is arranged below the electric cylinder mounting frame (015), and a first guide wheel rod (013) and a second guide wheel rod (014) are symmetrically arranged between the motor mounting plate (012) and the clamping plate limiting mechanism mounting rod (011); The top end and the bottom end of the plate body of the line selection frame (3) are respectively connected with an upper traction mechanism (6) and a lower traction mechanism (7), the upper traction mechanism (6) comprises a second servo cylinder (61), the second servo cylinder (61) is uniformly arranged on the electric cylinder mounting frame (015), a first steel wire rope (62) is connected to the output end piston rod of the second servo cylinder (61), the first steel wire rope (62) is used for connecting the top end of the line selection frame (3), and the first steel wire rope (62) is guided by the guide wheels on the second guide wheel rod (014); The lower traction mechanism (7) comprises a servo motor (71), the servo motor (71) is uniformly arranged on the motor mounting plate (012), a winding wheel (72) is arranged on the output end of the servo motor (71), a second steel wire rope (73) is wound on the winding wheel (72), and the second steel wire rope (73) is guided by the guide wheels on the first guide wheel rod (013); A sliding block (31) is arranged on the bottom of the side wall of the line selection frame (3), and the sliding block (31) is vertically slidably arranged on the clamping plate limiting mechanism (1).

2. The machine selection weft laying device according to claim 1, characterized in that The yarn cutting frame (2) comprises a rotating support rod (21), the tail end of the rotating support rod (21) is rotatably connected to the both ends of the mounting frame (01), a cutting knife mounting plate (24) is arranged between the front ends of the rotating support rods (21) on both sides, a sliding head (22) is arranged on the upper surface of the front end of the rod body of the rotating support rod (21), sliding rods (23) are slidably arranged on the sliding heads (22) on both sides in the transverse direction, a plurality of yarn cutting mechanisms (26) are uniformly arranged on the sliding rods (23) in the transverse direction, and a plurality of yarn guide mechanisms (25) are uniformly arranged on the cutting knife mounting plate (24) in the transverse direction and are aligned with the yarn cutting mechanisms (26). The one side rotating support rod (21) is provided with a first servo cylinder (27) on the front side of the rod body away from the one side wall frame of the cutting knife mounting plate (24), and the output end piston rod of the first servo cylinder (27) is assembled and connected with the sliding rod (23); The yarn cutting mechanism (26) comprises a blade mounting plate (261), a blade connecting plate (262), a first blade (263) and a second blade (264), the second blade (264) is mounted on the cutting knife mounting plate (24), the first blade (263) is rotationally fitted on the second blade (264), the outer side surface of the first blade (263) is connected with the blade connecting plate (262), one end of the blade connecting plate (262) away from the first blade (264) is rotationally connected on the blade mounting plate (261), and the blade mounting plate (261) is mounted on the sliding rod (23); The yarn guiding mechanism (25) comprises mounting blocks (251), the mounting blocks (251) are all arranged on the bottom of the cutting knife mounting plate (24), yarn guiding wheels (252) are symmetrically and rotationally arranged on the two sides of the mounting blocks (251), and the yarn guiding wheels (252) are all located on the front side of the yarn cutting mechanism (26).

3. The machine selection weft laying device according to claim 1, characterized in that The wire rod (5) is provided with a spring part (52) on the front end of the rod body, a wire passing port (51) is arranged on the front side of the wire rod (5), and the wire passing port (51) is arranged on the plate body of the wire selecting frame (3) and located above the wire clamping plate mechanism (4). The wire clamping plate mechanism (4) comprises first and second wire clamping plates (41) and (44), the tail ends of the first and second wire clamping plates (41) and (44) are superposedly mounted on the wire clamping plate mounting plate (32), the front end of the first wire clamping plate (41) is provided with a first clamping disc (42), and a through hole (43) is formed in the middle of the first clamping disc (42). The front end of the second wire clamping plate (44) is provided with a second clamping disc (45), the second clamping disc (45) is attached to the first clamping disc (42), a limiting movable column (46) is arranged on the second clamping disc (45), the limiting movable column (46) is movably inserted into the through hole (43), and the limiting movable column (46) is extruded by the wire clamping plate limiting mechanism (1).

4. The machine selection weft laying device according to claim 3, characterized in that The wire clamping plate limiting mechanism (1) comprises limiting plate bases (11), the limiting plate bases (11) are all mounted on the wire clamping plate limiting mechanism mounting rod (011), a support plate body (12) is vertically mounted on the limiting plate base (11), a wire clamping plate limiting head (13) is arranged on the top of the support plate body (12), and the wire clamping plate limiting head (13) is used for extruding the limiting movable column (46). The mounting frame (01) is provided with a slide rail frame (018) on one side of the wire clamping plate limiting mechanism mounting rod (011), the slide rail frame (018) comprises a slide rail frame connecting plate (0181), a plurality of slide rail mounting plates (0182) are uniformly arranged on the slide rail frame connecting plate (0181) in the transverse direction, and a slide rail (0183) is vertically arranged on each slide rail mounting plate (0182).

5. The machine selection weft laying device according to claim 1, wherein, The weft laying unit (002) comprises a trolley assembly (0023) which is slidingly arranged on a sliding frame (0021), the trolley assembly (0023) comprises a trolley frame (004) which is composed of an upper trolley plate (0041) and two side trolley plates (0042) which are vertically connected on the two sides of the upper trolley plate (0041), the two side trolley plates (0042) are sequentially and rotationally arranged with an extrusion rod (009), a first rotating rod (0010) and a second rotating rod (0011) from front to back, the side trolley plate (0042) located at the front side of the extrusion rod (009) is provided with a thread clamping mechanism (008), the surface of the side trolley plate (0042) away from the other side trolley plate (0042) is rotationally arranged with a thread pressing frame (005), the two thread pressing frames (005) are horizontally arranged with a thread pressing plate (006), and the two ends of the extrusion rod (009) are provided with an extrusion rod swing mechanism (007); The upper trolley plate (0041) is provided with a synchronous belt pressing plate (0043) in the middle of the upper surface, a plurality of first rollers (0044) are symmetrically and horizontally rotationally arranged on the two sides of the synchronous belt pressing plate (0043), and second rollers (0045) are symmetrically and vertically rotationally arranged at the side edges of the upper trolley plate (0041), and eccentric wheels (0046) are rotationally arranged below the second rollers (0045).

6. The machine selection weft laying device according to claim 5, characterized in that The thread pressing frame (005) comprises a first swing arm (0051), a second swing arm (0052) and a rotating arm (0053), the first swing arm (0051) is connected at the two ends of the second rotating rod (0011), one end of the first swing arm (0051) away from the second rotating rod (0011) is rotationally connected with the second swing arm (0052), the two second swing arms (0052) away from one side end of the first swing arm (0051) are mounted with the thread pressing plate (006), and the thread pressing plate (006) is located above the thread clamping mechanism (008); The second swing arm (0052) is rotationally connected with the rotating arm (0053) in the middle, and one end of the rotating arm (0053) away from the second swing arm (0052) is rotationally arranged at the two ends of the extrusion rod (009); The thread clamping mechanism (008) comprises a thread clamping plate connecting rod (0081) which is arranged in the middle of the first rotating rod (0010) and the second rotating rod (0011), the thread clamping plate connecting rod (0081) is horizontally provided with a thread clamping plate (0082) at the front side, the two side ends of the thread clamping plate (0082) are connected to the two side trolley plates (0042), and the bottom of the thread clamping plate (0082) is uniformly arranged with a plurality of thread clamping assemblies (0083) in the transverse direction. The thread clamping assembly (0083) comprises a pair of thread clamping arms (00832) each rotatably arranged on a thread clamping rotating seat (00831) arranged at the bottom of the thread clamping plate (0082), and a thread clamping spring (00833) is arranged between the thread clamping arms (00832) on both sides; The thread clamping arm (00832) is provided with a thread clamping end (008321) at the front end, a limiting end (008322) is arranged at the tail end of the thread clamping arm (00832), and the limiting end (008322) between adjacent thread clamping assemblies (0083) is used to be pressed by the pressing rod (009); A plurality of thread pressing holes (0061) are uniformly arranged at the bottom of the front side plate body in the transverse direction, and the thread pressing holes (0061) are aligned with the positions of the thread clamping assemblies (0083) below.

7. The machine selection weft laying device according to claim 1, characterized in that The pressing rod oscillating mechanism (007) comprises an oscillating frame (0071), a tension spring connecting block (0072), a first tension spring (0073), and a tension spring connecting rod (0074). The tension spring connecting block (0072) is connected and arranged at the two side ends of the rod body of the pressing rod (009). The tension spring connecting rod (0074) is arranged on the surface of the side plate (0042) between the first swing arm (0051) and the pressing rod (009). The tension spring connecting rod (0074) and the tension spring connecting block (0072) are connected and pulled by the first tension spring (0073). The oscillating frame (0071) comprises a first rotating block (00711) connected at the two side ends of the pressing rod (009), a second rotating block (00712) rotatably arranged on the first rotating block (00711), and a third rotating block (00713) rotatably connected to the other end of the second rotating block (00712) away from the first rotating block (00711). The third rotating block (00713) is connected and arranged at the end of the first rotating rod (0010) on both sides; A plurality of pressing columns (0091) are uniformly arranged on the pressing rod (009) in the transverse direction, and the pressing columns (0091) are used to press the limiting end (5322); A first limiting swing arm (00101) is arranged at the side end of the rod body of the first rotating rod (0010), and a first limiting roller (00102) is rotatably arranged at the side end of the first limiting swing arm (00101) away from the first rotating rod (0010); The second rotating rod (0011) is provided with a tension spring connecting seat (00113) symmetrically arranged on the rod body between the two side plates (0042), and a second tension spring (00114) is connected to the tension spring connecting seat (00113). One end of the second tension spring (00114) away from the tension spring connecting seat (00113) is connected to the upper plate (0041).

8. The machine selection weft laying device according to claim 1, characterized in that, The yarn conveying and clamping unit (003) comprises a mounting frame body (02), the top of one side surface of the mounting frame body (02) is horizontally provided with an upper chain cooperation block (09), a lower chain cooperation block (04) is arranged below the upper chain cooperation block (09), a chain assembly (07) is arranged outside the upper chain cooperation block (09) and the lower chain cooperation block (04), the chain assembly (07) comprises double-row chains (071) which are slidingly arranged outside the upper chain cooperation block (09) and the lower chain cooperation block (04), a plurality of connecting plates (072) are uniformly arranged on one side surface of the double-row chains (071), a clamping piece (05) is arranged on the other side surface of the connecting plate (072) away from the double-row chains (071), an adjusting assembly (08) is arranged below the upper chain cooperation block (09) of the mounting frame body (02), and the adjusting assembly (08) is used for adjusting the opening and closing of the clamping piece (05); The mounting frame body (02) is rotatably provided with a chain wheel (03) on one side of the adjusting assembly (08), the chain wheel (03) is externally toothed with the double-row chains (071), the mounting frame body (02) is provided with a movable opening (021) penetratingly arranged between the lower chain cooperation block (04) and the upper chain cooperation block (09), the mounting frame body (02) is provided with a driving assembly (06) below the movable opening (021) and on the surface where the adjusting assembly (08) is arranged, and the driving assembly (06) is connected with the adjusting assembly (08); The mounting frame body (02) is provided with a broken yarn detection mechanism (010) on the other side surface away from the chain wheel (03), the broken yarn detection mechanism (010) comprises a rotating mounting frame (0101) arranged on the mounting frame body (02), and the rotating mounting frame (0101) is provided with a broken yarn detection infrared probe (0102) on the top of the frame body.

9. The machine selection weft laying device according to claim 8, characterized in that The clamping piece (05) comprises a clamping seat (051), the clamping seat (051) is provided with a rotating cavity (0511), the rotating cavity (0511) is rotatably provided with a clamping block (052), the top of the clamping seat (051) is provided with a limiting portion (0512), and the limiting portion (0512) is used for abutting against the clamping block (052); The clamping block (052) is provided with a clamping surface (0522) on one side of the top of the block body close to the limiting portion (0512), the bottom of the clamping block (052) is provided with a limiting surface (0521), the limiting surface (0521) is used for being abutted by the adjusting assembly (08), and torsional springs (053) are arranged on both sides of the clamping block (052) and abut against the inner wall of the rotating cavity (0511).

10. The machine selection weft laying device according to claim 9, characterized in that The adjusting assembly (08) comprises a first rotating joint (082) and a second rotating joint (084), the first rotating joint (082) and the second rotating joint (084) are arranged between the upper chain cooperation block (09) and the lower chain cooperation block (04), a connecting rod (083) is movably connected between the first rotating joint (082) and the second rotating joint (084), a second push plate (086) is rotatably connected to one end of the first rotating joint (082) away from the connecting rod (083), and a first push plate (085) is rotatably connected to one end of the second rotating joint (084) away from the connecting rod (083); A limiting roller frame (087) is horizontally connected to the first push plate (085) and the second push plate (086), limiting rollers (088) are rotatably arranged on the limiting roller frame (087) in a uniform manner in the transverse direction, the limiting rollers (088) are used for contacting the limiting surface (0521), a push rod (081) is fixedly connected to the bottom of the second push plate (086), the push rod (081) is vertically movable at the movable opening (021), and the bottom of the push rod (081) is assembled and connected with the driving assembly (06); The driving assembly (06) comprises a third servo cylinder (061), the third servo cylinder (061) is arranged below the movable opening (021), and a piston rod (062) is assembled and arranged at the top output end of the third servo cylinder (061), and the top end of the piston rod (062) is connected with the push rod (081).

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