阅读说明：本技术 一种平整带的织带装置及该装置的织带方法 (Ribbon weaving device for leveling ribbon and ribbon weaving method of device ) 是由 项徐文 项建荣 魏前程 孙莉敏 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种平整带的织带装置及该装置的织带方法,涉及织带技术领域。它包括机架,机架设有穿纬管、锁边梭箱,锁边梭箱位于织带侧边与机架固定,穿纬管位于梭口侧边与机架移动连接,穿纬管、锁边梭箱中轴线重合,穿纬管管孔与锁边梭箱管孔相匹配,锁边梭箱中设有带锁边线的锁边梭,纬针引纬至梭口边,穿纬管插入纬线在针眼处形成的圈、穿纬管端面与锁边梭箱端面贴接,锁边梭从锁边梭箱穿行至穿纬管,纬针退出梭口,经线与纬线交织、锁边线位于织带侧边与纬线套接。本发明克服现有技术中织带不平整影响使用的缺陷,本发明有益效果为：锁边线如同增加了一根经线,编制出的织带的两条带边锁边受力均匀,厚薄统一,织带平整笔直。(The invention discloses a ribbon weaving device for a flat ribbon and a ribbon weaving method of the device, and relates to the technical field of ribbons. The weft insertion tube and the serging shuttle box are overlapped in central axes, the hole of the weft insertion tube is matched with the hole of the serging shuttle box, the serging shuttle box is internally provided with a serging shuttle with a lockstitch line, a weft needle is inserted to a shed edge, the weft insertion tube is inserted into a loop formed by the weft at a needle eye, the end face of the weft insertion tube is attached to the end face of the serging shuttle box, the serging shuttle passes through the serging shuttle box to the weft needle, the weft needle withdraws from the shed, warp threads are interwoven with the weft threads, and the serging threads are positioned on the lateral sides of the woven tapes and are sleeved with the weft threads. The invention overcomes the defect that the use is influenced by the unevenness of the woven tape in the prior art, and has the beneficial effects that: the lockstitch line is like having increased a warp, and two band limits lockstitch of the meshbelt of weaving out are atress even, and thickness is unified, and the meshbelt is level and smooth straight.)

1. The utility model provides a meshbelt device of level area, it includes frame, meshbelt (1), weft needle (2), weft (11), warp (12) that are equipped with eye of the needle (21), eye of the needle (21) is passed in weft (11), warp (12) form the shed with meshbelt (1), its characterized in that: the machine frame is provided with a weft insertion tube (5) and an edge locking shuttle box (6), the edge locking shuttle box (6) is tubular and is positioned at the side edge of a woven tape (1) and fixed with the machine frame, the weft insertion tube (5) is tubular and is positioned at the side edge of a shed and movably connected with the machine frame, the central axes of the weft insertion tube (5) and the edge locking shuttle box (6) are superposed, the pipe hole of the weft insertion tube (5) is matched with the pipe hole of the edge locking shuttle box (6), an edge locking shuttle (7) is arranged in the edge locking shuttle box (6), a locking line (71) is arranged in the edge locking shuttle (7), a weft needle (2) is inserted to the shed edge, the weft insertion tube (5) is inserted into a ring formed at a needle eye (21) by a weft thread (11), the end face of the weft insertion tube (5) is attached to the end face of the edge locking shuttle box (6), the edge locking shuttle (7) passes through the edge locking shuttle box (6) to the weft insertion tube (5), and the weft needle (2) exits from, the warp (12) and the weft (11) are interwoven, and the lockstitch line (71) is positioned at the side edge of the woven tape (1) and is sleeved with the weft (11).

2. A flat belt webbing apparatus as claimed in claim 1, wherein: wear cop (5) and be the plane structure for pipe, bottom, the side of wearing cop (5) is equipped with wears cop opening (51), it is strip, length direction for wearing cop (5) axis extension direction to wear cop opening (51), wear the preceding terminal surface of cop (5) for with the plane of the axis slope of wearing cop (5), it faces the shed to wear cop opening (51).

3. A flat belt webbing apparatus as claimed in claim 2, wherein: the inner hole of the serging shuttle box (6) is circular, the bottom surface of the serging shuttle box (6) is a plane, a serging shuttle box opening (61) is arranged on the side surface of the serging shuttle box (6), the serging shuttle box opening (61) is strip-shaped, the length direction of the serging shuttle box opening is the extending direction of the central axis of the inner hole of the serging shuttle box (6), the serging shuttle box opening (61) faces towards the woven belt (1), the rear end surface of the serging shuttle box (6) is a plane inclined to the central axis of the inner hole of the serging shuttle box (6), the rear end surface of the serging shuttle box (6) is attached to the front end surface of the weft tube (5), and the tube hole and the weft tube opening (51) of the weft tube (5) are smoothly connected with the inner hole and the serging shuttle box opening (61) of the serging shuttle box (6).

4. A flat belt webbing apparatus as claimed in claim 2, wherein: the frame rigid coupling has wear cop slide (4), it is the tubulose to wear cop slide (4), the hole of wearing cop slide (4) is the axis coincidence of round hole, round hole and wearing cop (5), the hole bottom surface of wearing cop slide (4) is the plane, the hole of wearing cop slide (4) with wear cop (5) phase-match.

5. A flat belt webbing apparatus as claimed in claim 4, wherein: wear cop slide (4) and be equipped with and wear cop slide opening (41), wear cop slide opening (41) and be strip, length direction is the axis extension direction of wearing cop slide (4), wear cop slide opening (41) towards the shed, the width of wearing cop slide opening (41) is greater than wear the width of cop opening (51).

6. A flat belt webbing apparatus as claimed in claim 2, wherein: the weft insertion mechanism is characterized in that a weft insertion pipe connecting groove (22) is formed in the upper surface of the weft needle (2), the weft insertion pipe connecting groove (22) is located on the side face of the needle eye (21) and the upper surface of the sunken weft needle (2), and the weft insertion pipe connecting groove (22) is matched with the weft insertion pipe (5).

7. A flat belt webbing apparatus as claimed in claim 1, wherein: a tensioner is arranged at the wire outlet of the serging shuttle (7), and the lockstitch wire (71) penetrates through the tensioner and extends out of the serging shuttle (7).

8. A method of weaving a flat belt webbing apparatus according to claim 1, wherein: the method comprises the following steps: step one, opening a shed, inserting weft by the weft needle (2) to the edge of the shed, and inserting a weft inserting tube (5) into a loop formed by the weft (11) at a needle eye (21); secondly, the front end face of the weft insertion tube (5) is attached to the rear end face of the serging shuttle box (6), and a serging shuttle (7) in the serging shuttle box (6) penetrates into the weft insertion tube (5); step three, the weft penetrating pipe (5) withdraws from a loop formed by the weft (11) at the needle eye (21), and a lockstitch line (71) penetrates into the loop; step four, the weft needle (2) is withdrawn from the shed, the shed is closed, the warp (12) is interwoven with the weft (11), and the lockstitch line (71) and the weft (11) are sleeved and lockstitched on the edge of the woven tape (1); and step five, the weft insertion pipe (5) is butted with the serging shuttle box (6) again, and the serging shuttle (7) penetrates back into the serging shuttle box (6).

9. A method of forming a flat belt webbing system according to claim 8, wherein: in the fourth step, before the warp (12) and the weft (11) are interwoven and beaten, the serging shuttle (7) is retained in the weft insertion tube (5), and the serging line (71) is kept tensioned.

10. A flat belt webbing apparatus as claimed in claim 8, wherein: in the fifth step, after the warps (12) and the wefts (11) are interwoven and beaten, the serging shuttle (7) penetrates back into the serging shuttle box (6).

Technical Field

The invention relates to the technical field of related woven belts, in particular to a woven belt flattening device and a woven belt weaving method using the same.

Background

The woven belt is a common article in daily life. Flat belts, in particular, are also commonly used as ladder belts in window blinds. According to weft insertion of a weft needle for a traditional shuttleless loom, one side of the woven belt is subjected to warp interweaving and overlocking, and the other side of the woven belt is subjected to sleeve joint and overlocking of the weft through a crochet hook. Because the weft lock stitch on both sides of the mesh belt is stressed unevenly, two belt edges of the mesh belt are loose and tight, and one side of the two belt edges of the mesh belt is thin and the other side is thick, the whole mesh belt is curved in a circular arc shape, which is commonly called as 'big knife curve'. The ladder belt in the blind is responsible for the rotation of the blades, and the bending of the ladder belt can cause the unbalanced rotation of the blades and influence the use of the whole blind.

Disclosure of Invention

The invention provides a ribbon weaving device for a flat ribbon with uniform seaming edges at two sides of a shuttleless ribbon loom and a ribbon weaving method thereof, aiming at overcoming the defect that the use is influenced by the unevenness of the ribbon weaving in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a ribbon weaving device for a flat ribbon, which comprises a frame, a ribbon, weft needles with needle holes, weft threads and warp threads, the weft threads penetrate through the needle eye, the warp threads and the woven belt form a shed, the frame is provided with a weft threading tube and a serging shuttle box, the serging shuttle box is tubular and is positioned at the side edge of the woven tape and fixed with the frame, the weft insertion tube is tubular and is positioned at the side edge of the shed and movably connected with the frame, the central axes of the weft insertion tube and the serging shuttle box are superposed, the tube hole of the weft insertion tube is matched with the tube hole of the serging shuttle box, the serging shuttle box is provided with a serging shuttle which is provided with a lockstitch line, the weft needle inserts weft to the edge of the shed, the weft insertion tube inserts the loops formed by the weft at the needle eye, the end surface of the weft insertion tube is attached to the end surface of the serging shuttle box, the serging shuttle penetrates to the weft insertion tube from the serging shuttle box, the weft needle exits from the shed, the warp threads are interwoven with the weft threads, and the serging line is positioned on the side edge of the woven tape and is sleeved with the weft threads.

The weft needle is L-shaped, one end of the weft needle is connected with the weft insertion mechanism, and the other end of the weft needle is suspended. The free end of the weft needle passes through the weft insertion in the shed. The needle eye is arranged at the end part of the suspended end of the weft needle and penetrates through the upper surface and the lower surface of the weft needle. The weft is placed on the right side of the shed, one end of the weft is wound on the bobbin of the weft, and the other end of the weft penetrates through the needle eye to be interwoven with the warp. The shed is opened, the weft needle is used for weft insertion to the left side of the shed, and the weft is folded back at the needle eye to form a loop which is opened towards the right. The front end of the weft insertion tube is inserted into the circle, the serging shuttle passes through the serging shuttle box to the weft insertion tube, and the lockstitch thread is sleeved into the circle. The weft needle carries out weft insertion towards the right, the closed end of the weft needle is blocked by the lockstitch line and can not enter the shed, and a lockstitch is formed. The lockstitch line is like having increased a warp, and two band limits lockstitch of the meshbelt of weaving out are atress even, and thickness is unified, and the meshbelt is level and smooth straight.

Preferably, the weft insertion tube is a round tube, the bottom of the weft insertion tube is of a planar structure, a weft insertion tube opening is formed in the side face of the weft insertion tube, the weft insertion tube opening is strip-shaped, the length direction of the weft insertion tube opening is the extension direction of the central axis of the weft insertion tube, the front end face of the weft insertion tube is a plane inclined to the central axis of the weft insertion tube, and the weft insertion tube opening faces to a shed. The weft is inserted to the left side of the shed by the weft needle, the part of the weft from the bobbin connecting end of the weft to the needle eye is above the upper surface of the weft needle, and the part of the weft from the braid connecting end to the needle eye is below the lower surface of the weft needle. The weft insertion tube is inserted into the weft thread loop only by inserting the weft thread loop between the upper surface of the weft needle and the weft thread located on the upper surface of the weft needle. The whole weft insertion tube is a round tube, so that the resistance in the insertion of the weft insertion tube and the weft ring is reduced, and the insertion is smoother. The bottom of the weft insertion tube is a plane, the bottom of the weft insertion tube can be more closely attached to the upper surface of a weft needle, and the weft needle can be conveniently inserted between weft threads. The opening of the weft insertion tube opens the two ends of the weft insertion tube and faces to the shed to form a lockstitch channel, so that the lockstitch line is conveniently sleeved with the weft.

Preferably, the inner hole of the serging shuttle box is circular, the bottom surface of the serging shuttle box is a plane, the side surface of the serging shuttle box is provided with a serging shuttle box opening, the serging shuttle box opening is strip-shaped, the length direction of the serging shuttle box opening is the extension direction of the central axis of the inner hole of the serging shuttle box, the serging shuttle box opening faces towards the woven tape, the rear end surface of the serging shuttle box is a plane inclined to the central axis of the inner hole of the serging shuttle box, the rear end surface of the serging shuttle box is attached to the front end surface of the weft insertion tube, and the tube hole of the weft insertion tube and the weft insertion tube opening are smoothly connected with the inner hole of the serging shuttle box and the ser. The weft insertion tube is in butt joint with the serging shuttle box, the weft insertion tube and the serging shuttle box are integrated, an inner hole is a passage through which the serging shuttle passes, and an opening is a serging line passage. The front end surface of the weft insertion tube is in inclined plane butt joint with the rear end surface of the serging shuttle box, the respective extension lengths of the joints are added, and the serging shuttle can more smoothly pass through the joints.

Preferably, the machine frame is fixedly connected with a weft insertion tube slide way, the weft insertion tube slide way is tubular, an inner hole of the weft insertion tube slide way is a circular hole, the central axis of the circular hole coincides with the central axis of the weft insertion tube, the bottom surface of the inner hole of the weft insertion tube slide way is a plane, and the inner hole of the weft insertion tube slide way is matched with the weft insertion tube. The weft insertion tube is thin and unstable in movement, and the weft insertion tube slide way plays a role in guiding and ensures that the weft insertion tube does not deviate from the direction in the movement process. The weft insertion tube slide way is sleeved outside the weft insertion tube and can also play a role in protecting the weft insertion tube.

Preferably, the weft insertion slideway is provided with a weft insertion slideway opening, the weft insertion slideway opening is strip-shaped, the length direction of the weft insertion slideway opening is the extension direction of a central axis of the weft insertion slideway, the weft insertion slideway opening faces to a shed, and the width of the weft insertion slideway opening is greater than that of the weft insertion opening. The opening of the weft insertion slideway is provided with two ends of the weft insertion slideway to form a through groove. The weft insertion tube slide is sleeved with the weft insertion tube and cannot be locked, and the lockstitch line coming out from the weft insertion tube opening cannot be blocked.

Preferably, the upper surface of the weft needle is provided with a weft insertion pipe connecting groove, the weft insertion pipe connecting groove is positioned on the side surface of the needle eye and on the upper surface of the sunken weft needle, and the weft insertion pipe connecting groove is matched with the weft insertion pipe. The weft insertion tube is inserted between the weft and the upper surface of the weft, and the lower surface of the weft insertion tube is attached to the weft insertion tube connecting groove, so that the height of the weft is reduced, and the weft insertion is facilitated.

Preferably, the thread outlet of the serging shuttle is provided with a tensioner, and the lockstitch thread passes through the tensioner and extends out of the serging shuttle. After the lockstitch line is sleeved with the weft, the weft needle is withdrawn from the shed, the weft has tension on the lockstitch line, and the tension of the tensioner is used for resisting the tension, so that the lockstitch line is prevented from entering the shed, and the lockstitch is guaranteed to be smooth.

A method of webbing a webbing apparatus for leveling a belt, comprising the steps of: step one, opening a shed, inserting weft to the edge of the shed by a weft needle, and inserting a weft-inserting tube into a loop formed by the weft at a needle eye; secondly, the front end face of the weft insertion tube is attached to the rear end face of the serging shuttle box, and a serging shuttle in the serging shuttle box penetrates into the weft insertion tube; step three, the weft insertion tube withdraws from a loop formed by the weft at the needle eye, and the serging thread penetrates into the loop; step four, the weft needle is withdrawn from the shed, the shed is closed, the warp threads and the weft threads are interwoven, and the lockstitch threads and the weft threads are sleeved and lockstitched on the woven tape edges; and step five, the weft insertion tube is butted with the serging shuttle box again, and the serging shuttle penetrates back into the serging shuttle box.

The weft is placed on the right side of the shed. One end of the weft is wound on the bobbin of the weft, and the other end of the weft passes through the needle eye to be interwoven with the warp. The shed opening, the weft needle picks up the weft to the left side of the shed, the part of the weft from the bobbin connecting end of the weft to the needle eye is above the upper surface of the weft needle, the weft is folded back at the needle eye, and the part of the weft from the braid connecting end to the needle eye is below the lower surface of the weft needle. The weft forms a loop opening to the right. The weft insertion tube penetrates between the weft above the upper surface of the weft and the upper surface of the weft, namely penetrates into the weft coil. The weft insertion tube is in butt joint with the serging shuttle box, the serging shuttle moves into the weft insertion tube from the serging shuttle box, and the locking line penetrates into a weft coil. The weft needle is withdrawn from the shed, and the sealing end of the weft coil cannot enter the shed because the sealing end of the weft coil is blocked by the locking line. The shed is closed, the upper and lower warps are crossed and interwoven with the wefts, the sealing end of the weft coil penetrates through a locking line, the opening end of the weft coil is pressed by the warps in a crossed manner, the wefts, the locking line and the warps are interwoven together, and the locking line locks the wefts. After the shed is closed and beaten up, the weft insertion tube is connected with the serging shuttle box again, and the serging shuttle returns to the serging shuttle box to prepare for next weft serging.

Preferably, in the fourth step, before the warp and the weft are interwoven and beaten up, the lockstitch shuttle is retained in the weft insertion tube, and the lockstitch thread is kept tensioned. The lockstitch line prevents the weft thread from returning into the shed, ensuring that the lockstitch is straight.

Preferably, in the fifth step, after the warp and the weft are interwoven and beaten up, the serging shuttle passes back into the serging shuttle box. After beating up, the weft releases the force for pulling the lockstitch line into the shed, and the lockstitch shuttle returns to the lockstitch shuttle box without influencing the lockstitch.

The invention has the beneficial effects that: the lockstitch line is like having increased a warp, and two band limits lockstitch of the meshbelt of weaving out are atress even, and thickness is unified, and the meshbelt is level and smooth straight. The subsequent procedures of leveling and straightening the woven belt are reduced, the efficiency is improved, and the production cost is reduced. The smooth mesh belt has a wider application range and is convenient to popularize.

Drawings

FIG. 1 is a schematic structural view of a weft insertion tube and a weft insertion coil according to the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is a schematic structural view during beating-up according to the present invention;

FIG. 5 is a schematic structural view of the overlock shuttle of the present invention shown retracted into the overlock shuttle box;

FIG. 6 is a schematic view showing the structure of the present invention in which the serging shuttle returns to the box of the serging shuttle and the weft insertion tube retracts.

In the figure: a mesh belt 1; a weft needle 2; a reed 3; a weft insertion tube slideway 4; a weft insertion tube 5; a serging shuttle box 6; a serging shuttle 7; weft threads 11; warp threads 12; an eyelet 21; a through-weft connecting slot 22; a through-weft tube chute opening 41; a weft insertion opening 51; a lockstitch shuttle box opening 61; lockstitch line 71.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

Example 1:

as shown in figure 1, the ribbon flattening device comprises a frame, a ribbon 1, weft needles 2, reeds 3, wefts 11 and warps 12. The weft needle 2 is L-shaped, one end of which is connected with a weft insertion mechanism (not shown) and the other end is suspended. The warp threads 12 form a shed with the webbing 1. The weft 11 is placed on the right side of the shed. One end of the weft is wound on a bobbin (not shown) of the weft, and the other end of the weft passes through the needle eye to be interwoven with the warp. The weft needle 2 is provided with an eye 21. The needle eye 21 penetrates the upper and lower surfaces of the weft needle 2 at the end of the free end of the weft needle 2. The weft thread 11 passes through the needle eye 21, and the weft thread 11 is folded back at the needle eye 21 to form a loop opening to the right. The reed 3 is connected to a beating-up mechanism (not shown). The weft threads 11 pass through the eye of the reed 3. The frame is provided with a weft insertion tube 5 and a serging shuttle box 6. The overlock shuttle box 6 is tubular and is positioned at the left side edge of the mesh belt 1 and fixed with the frame. The weft insertion tube 5 is tubular and is positioned at the left side of the shed and is movably connected with the frame. The central axes of the weft insertion tube 5 and the serging shuttle box 6 are superposed. The shape and size of the pipe hole of the weft insertion pipe 5 are the same as those of the pipe hole of the serging shuttle box 6. The serging shuttle box 6 is provided with a serging shuttle 7. A lockstitch line 71 is provided in the lockstitch shuttle 7. The outlet of lockstitch shuttle 7 is provided with a tensioner lockstitch line 71 extending out of lockstitch shuttle 7 through the tensioner. The shed is opened and the weft needle 2 is inserted to the shed edge. The weft insertion tube 5 inserts the loops formed by the weft 11 at the needle eye 21, and the end surface of the weft insertion tube 5 is jointed with the end surface of the serging shuttle box 6. The serging shuttle 7 passes from the serging shuttle box 6 to the weft insertion tube 5. The weft needle 2 exits from the shed, the warp 12 is interwoven with the weft 11, and the lockstitch 71 is positioned at the side edge of the woven tape 1 and is sleeved with the weft 11.

As shown in fig. 1, 2 and 3, the weft insertion tube 5 is a round tube with a flat bottom. A side of the insertion tube 5 is provided with a insertion tube opening 51. The weft insertion tube opening 51 is strip-shaped, and the length direction is the extension direction of the central axis of the weft insertion tube 5. The front end surface of the weft insertion tube 5 is a plane inclined to the central axis of the weft insertion tube 5. The through-weft opening 51 is directed towards the shed.

The inner hole of the serging shuttle box 6 is round, and the bottom surface is a plane. The side surface of the serging shuttle box 6 is provided with a serging shuttle box opening 61. The opening 61 of the serging shuttle box is strip-shaped, and the length direction is the extension direction of the central axis of the inner hole of the serging shuttle box 6. The lockstitch box opening 61 faces the webbing 1. The rear end face of the serging shuttle box 6 is a plane inclined with the central axis of the inner hole of the serging shuttle box 6. The back end surface of the serging shuttle box 6 is attached to the front end surface of the weft insertion tube 5. The pipe hole of the weft insertion pipe 5 and the weft insertion pipe opening 51 are smoothly connected with the inner hole of the serging shuttle box 6 and the serging shuttle box opening 61.

The frame is fixedly connected with a weft insertion tube slideway 4. The weft insertion tube slide 4 is tubular. The inner hole of the weft insertion tube slideway 4 is a circular hole, and the central axis of the circular hole is superposed with the central axis of the weft insertion tube 5. The bottom surface of the inner hole of the weft insertion tube slideway 4 is a plane. The inner hole of the weft insertion tube slideway 4 is matched with the weft insertion tube 5.

The weft insertion chute 4 is provided with a weft insertion chute opening 41. The weft insertion slideway opening 41 is strip-shaped, and the length direction is the extension direction of the central axis of the weft insertion slideway 4. The through-weft chute opening 41 is directed towards the shed. The width of the penetration slide opening 41 is larger than the width of the penetration opening 51.

The upper surface of the weft needle 2 is provided with a weft insertion tube connecting groove 22. The weft insertion tube connecting groove 22 is positioned on the side surface of the needle eye 21 and on the upper surface of the concave weft needle 2. The shape of the weft insertion pipe connecting groove 22 is the same as that of the bottom surface of the weft insertion pipe 5 and is slightly larger than that of the weft insertion pipe 5.

As shown in fig. 1, a webbing method of a webbing apparatus for a leveling belt includes the steps of: step one, the reed 3 is pushed to the rearmost, and the shed is opened. The weft needle 2 picks up to the left of the shed. The weft insertion tube 5 is inserted between the upper surface of the weft needle 2 and the weft thread 11 above the weft needle 2. The lower part of the weft needle 2 is embedded in the weft insertion tube connecting groove 22. The weft insertion tube 5 is inserted in the weft thread 11 loop formed at the needle eye 21.

And step two. The front end surface of the weft insertion tube 5 is attached to the rear end surface of the serging shuttle box 6. A picking mechanism (not shown) in the lockstitch box 6 is operated, and the lockstitch 7 in the lockstitch box 6 passes through the weft insertion tube 5 and stays in the weft insertion tube 5.

As shown in fig. 4, in step three, the weft insertion tube 5 withdraws the loop formed by the weft thread 11 at the needle eye 21. The lockstitch line 71 penetrates into the loop.

Step four, the weft needle 2 is withdrawn from the shed, the shed is closed, the warp 12 is interwoven with the weft 11, the serging shuttle 7 is retained in the weft penetrating pipe 5, and the serging line 71 is kept tensioned. The weft needle 2 is completely withdrawn from the shed, and the reed 3 is pushed forwards to beat up. The shed is closed, the upper and lower warps 12 are crossed and interwoven with the wefts 11, the sealing end of the weft coil is penetrated with a lockstitch line 71, the opening end is crossed and pressed by the warps 12, the wefts 11, the lockstitch line 71 and the warps 12 are interwoven together, and the lockstitch line 71 locks the wefts 11. The lockstitch line 71 and the weft 11 are sleeved on the lockstitch at the edge of the mesh belt 1.

As shown in fig. 5, step five, the warp 12 is interwoven with the weft 11, the reed 3 is beaten up to complete the retreat, and the weft needle 2 penetrates into the shed again. While the weft needle 2 is entering the shed, the insertion tube 5 is again moved into abutment with the catch box 6. A pick mechanism (not shown) in the weft insertion tube 5 is operated, and the serging shuttle 7 is inserted back into the serging shuttle box 6.

As shown in fig. 6, after the serging shuttle 7 is inserted back into the serging shuttle box 6, the weft insertion tube 5 retreats, and the front end of the weft insertion tube 5 completely hides in the weft insertion tube slideway 4 to prepare for next weft serging.