Self-stopping device for broken weft and air-jet loom
By installing a yarn-binding bracket and a weft stop bar at the yarn feed end of the weft feeder on the air-jet loom, continuous detection of weft yarns and timely machine stoppage can be achieved, solving the problems of high cost and high defect rate in the production of multi-weft fabrics on air-jet looms, and improving product efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI NINGFANG GRP
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-26
AI Technical Summary
When weaving multi-weft fabrics, existing technology adds a yarn doubling process to air-jet looms, which increases equipment and labor costs. Weft yarn breakage after doubling cannot be detected, resulting in a large number of defective products.
A yarn-binding bracket and a weft stop bar are installed at the yarn feed end of the weft feeder on the air-jet loom. The weft stop bar triggers the electrode to conduct when it falls under its own weight when the weft yarn breaks, thereby realizing the continuous detection of the weft yarn and timely shutdown.
It saves equipment and labor costs, improves the pass rate and quality of multi-weft fabric products, and avoids a large number of defective products caused by the breakage of a single weft yarn.
Smart Images
Figure CN224412017U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of loom technology, specifically relating to a yarn-breaking and weft-stopping device and an air-jet loom. Background Technology
[0002] When weaving multi-weft fabrics such as double-weft or checkered fabrics, air-jet looms require inserting multiple weft yarns in a single weft insertion. If the weft insertion is performed twice in a single weft insertion, weft shrinkage defects can easily occur due to the lack of warp and weft twisting. Therefore, the current process for multi-weft products involves performing a yarn-joining operation on multiple weft yarns after spinning, and then directly inserting the joined yarns onto the air-jet loom. This allows the air-jet loom to insert multiple weft yarns simultaneously in a single weft insertion. However, this added yarn-joining process after spinning increases equipment and labor costs, affecting product efficiency. Furthermore, if a single weft yarn breaks after joining, the insertion can still be completed, making it impossible for weft detectors to detect, potentially leading to a large number of defective products. Utility Model Content
[0003] This utility model provides a yarn-cutting weft-stopping device and an air-jet loom, which aims to reduce the production cost of multi-weft fabric products and improve the product qualification rate.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Firstly, a yarn-joining breakage self-stopping device is provided, comprising a yarn-joining support, a weft stop bar, and multiple weft stop pieces; the yarn-joining support is fixedly installed at the yarn inlet end of the weft feeder of an air-jet loom, and multiple yarn guide channels are spaced apart on the yarn-joining support, each yarn guide channel being used to pass through a weft yarn and guide the weft yarn into the yarn inlet hole of the weft feeder; the weft stop bar is fixedly connected to the yarn-joining support and located directly above each yarn guide channel, and the weft stop bar has positive and negative electrodes electrically connected to the control circuit of the air-jet loom; multiple weft stop pieces are spaced apart on the weft stop bar, and each weft stop piece is provided with a threading hole suitable for each corresponding weft yarn to pass through; wherein, when any weft yarn breaks, the corresponding weft stop piece falls due to its own weight, triggering the positive and negative electrodes of the weft stop bar to conduct.
[0005] In conjunction with the first aspect, in one possible implementation, the yarn guide includes a first yarn guide plate and a second yarn guide plate arranged in parallel at intervals; the first yarn guide plate has a plurality of first yarn guide holes distributed at intervals, and the second yarn guide plate has a plurality of second yarn guide holes distributed at intervals; wherein each first yarn guide hole corresponds one-to-one with each second yarn guide hole, and the corresponding first yarn guide holes and second yarn guide holes together form a yarn guide channel; the weft stop plate is located between the first yarn guide plate and the second yarn guide plate.
[0006] In some embodiments, the first yarn guide plate is located between the second yarn guide plate and the yarn inlet end of the weft feeder, and the interval between adjacent first yarn guide holes is smaller than the interval between adjacent second yarn guide holes.
[0007] For example, a plurality of first ceramic sleeves are spaced apart on the first yarn guide plate, and the inner hole of the first ceramic sleeve forms a first yarn guide hole; a plurality of second ceramic sleeves are spaced apart on the second yarn guide plate, and the inner hole of the second ceramic sleeve forms a second yarn guide hole.
[0008] For example, the axial direction of the first yarn guide hole is set at an angle to the axial direction of the yarn inlet hole.
[0009] In conjunction with the first aspect, in one possible implementation, the weft stop bar includes a first conductive bar as a positive electrode, a second conductive bar as a negative electrode, and two junction boxes; the two junction boxes are respectively fixed on both sides of the yarn dotting support, and the first and second conductive bars are spaced apart vertically; wherein, the two ends of the first and second conductive bars are respectively inserted into the two junction boxes and connected to the circuit inside the junction boxes, and the two junction boxes are electrically connected to the control circuit.
[0010] In some embodiments, the weft stop sheet is provided with an elongated hole, through which both the first conductive strip and the second conductive strip pass; wherein, the first conductive strip is located above the second conductive strip, and both sides of the first conductive strip are provided with an insulating coating.
[0011] For example, the yarn breakage automatic stop device also includes a yarn spreading support, which is provided with several support rods for threading the bobbin and allowing the weft yarn wound on the bobbin to enter the yarn guide channel.
[0012] For example, the yarn spreading support is also equipped with several yarn clamping discs or yarn clamping plates, which are located between the yarn spool and the yarn guide channel and provide clamping force for the weft yarn.
[0013] The beneficial effects of the self-stopping device for weft breakage in yarn plying provided by this utility model are as follows: Compared with the prior art, the self-stopping device for weft breakage in yarn plying in this utility model, for multi-weft fabric products, installs a yarn plying bracket at the yarn inlet end of the weft feeder on the air-jet loom. The weft yarns unwound from different spools pass through each yarn guide channel and then converge into the yarn inlet hole of the weft feeder to complete the plying. Compared with the method of using a separate plying device for plying after spinning, this not only saves equipment costs but also saves labor costs, thereby ensuring the efficiency of multi-weft fabric products; because each weft yarn passes through... The weft stop bar has a threading hole on one of the weft stops. Therefore, if any weft yarn breaks, the corresponding weft stop bar will lose the support of that weft yarn and fall under its own weight. This will connect the positive and negative electrodes of the weft stop bar to form a closed circuit and feed a signal to the control circuit of the air-jet loom, so that the air-jet loom can stop in time. This achieves continuous detection of each weft yarn before it enters the threading hole, avoiding the problem of the air-jet loom continuing to run after a single weft yarn breaks, which would produce a large number of defective products. This improves the pass rate and quality of multi-weft fabric products.
[0014] Secondly, this utility model embodiment also provides an air-jet loom, including the above-mentioned automatic stop device for weft breakage during yarn dotting.
[0015] The beneficial effects of the air-jet loom provided by this utility model are as follows: Compared with the prior art, the air-jet loom of this utility model adopts the above-mentioned yarn-joining breakage self-stop device, which can complete yarn joining simultaneously during the process of the weft yarn entering the weft feeder, thereby saving yarn joining costs and improving product efficiency for multi-weft fabric products; by using the cooperation of weft stop strips and multiple weft stop plates, the continuity detection of each weft yarn before joining into the yarn feed hole can be completed, avoiding the problem of the air-jet loom continuing to run after a single weft yarn breaks, resulting in a large number of unqualified products, thereby improving the pass rate and quality of multi-weft fabric products. Attached Figure Description
[0016] Figure 1 A three-dimensional structural schematic diagram of the automatic stop device for weft breakage during yarn plying provided in an embodiment of this utility model;
[0017] Figure 2 for Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;
[0018] Figure 3 This is a three-dimensional structural diagram of the yarn-plying support and weft stop strip used in the embodiments of this utility model;
[0019] Figure 4 This is a schematic diagram of the cooperation structure between the weft stop plate and the weft stop strip in the weft yarn breakage self-stop device provided in this embodiment of the utility model.
[0020] In the diagram: 10. Yarn doubling bracket; 11. First yarn guide plate; 111. First yarn guide hole; 112. First porcelain sleeve; 12. Second yarn guide plate; 121. Second yarn guide hole; 122. Second porcelain sleeve; 20. Weft feeder; 21. Yarn inlet hole; 30. Weft stop bar; 31. First conductive bar; 311. Insulating coating; 32. Second conductive bar; 33. Junction box; 40. Weft stop piece; 41. Yarn threading hole; 42. Long strip hole; 50. Yarn spreading bracket; 51. Support rod; 52. Yarn clamping piece; 60. Bollard. Detailed Implementation
[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0022] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.
[0023] Please refer to the following: Figures 1 to 4 The automatic stop device for yarn breakage provided by this utility model is described below. The automatic stop device for yarn breakage includes a yarn doubling support 10, a weft stop bar 30, and multiple weft stop pieces 40. The yarn doubling support 10 is fixedly installed at the yarn inlet end of the weft feeder 20 of the air-jet loom. Multiple yarn guide channels are distributed at intervals on the yarn doubling support 10. Each yarn guide channel is used to pass through a weft yarn and guide the weft yarn into the yarn inlet hole 21 of the weft feeder 20. The weft stop bar 30 is fixedly connected to the yarn doubling support 10 and is located directly above each yarn guide channel. The weft stop bar 30 has positive and negative electrodes that are electrically connected to the control circuit of the air-jet loom. Multiple weft stop pieces 40 are distributed at intervals on the weft stop bar 30. Each weft stop piece 40 is provided with a threading hole 41 suitable for each weft yarn to pass through. When any weft yarn breaks, the corresponding weft stop piece 40 falls due to its own weight, triggering the positive and negative electrodes of the weft stop bar 30 to conduct.
[0024] First, it should be understood that multi-weft fabric products refer to fabrics where two or more weft yarns pass through each warp interlacing point. Currently, double-weft and triple-weft fabrics are common. The main function of the weft feeder 20 is to store a certain amount of weft yarn to ensure that the weft yarn can be continuously and stably supplied to the air-jet loom during the weaving process. It is a key component of the air-jet loom before weft insertion, and as it is existing technology, it will not be described in detail here.
[0025] It should be noted that the working principle of the weft stop strip 30 and weft stop plate 40 in this embodiment to achieve weft breakage self-stop is the same as the loom warp breakage detection principle (the cooperation structure of the warp stop plate and the weft stop strip): During the weaving process, when the warp yarn passing through a certain warp stop plate breaks, the warp yarn loses its suspension tube to the warp stop plate, causing the warp stop plate, which was originally in a suspended state, to fall and hang on the warp stop strip, thus connecting the electrical circuit between the chip and the iron of the warp stop strip (i.e., the positive and negative electrodes are connected), and the warp stop box feeds the signal back to the loom control system to stop the loom. After the broken warp yarn is manually spliced, the weaving work is resumed.
[0026] The weft yarn breakage automatic stop device provided in this embodiment, compared with the prior art, for multi-weft fabric products, installs a yarn-joining bracket 10 at the yarn inlet end of the weft feeder 20 of the air-jet loom. The weft yarns unwound from different bobbins 60 pass through each yarn guide channel and converge into the yarn inlet hole 21 of the weft feeder 20 to complete the yarn joining. Compared with the method of using a yarn-joining device separately for yarn joining after spinning, it not only saves equipment costs but also saves labor costs, thereby ensuring the efficiency of multi-weft fabric products; since each weft yarn passes through one of the weft stop plates 40 respectively. The yarn feed hole 41 is such that if any weft yarn breaks, the corresponding weft stop strip 40 will lose the support of that weft yarn and fall under its own weight, thereby connecting the positive and negative electrodes of the weft stop strip 30 to form a closed circuit and feeding back a signal to the control circuit of the air-jet loom. This allows the air-jet loom to stop in time, thus achieving continuous detection of each weft yarn before it enters the yarn feed hole 21. This avoids the problem of the air-jet loom continuing to run after a single weft yarn breaks, resulting in a large number of defective products, thereby improving the pass rate and quality of multi-weft fabric products.
[0027] In some embodiments, see Figure 2 and Figure 3The yarn guide 10 includes a first yarn guide plate 11 and a second yarn guide plate 12 arranged in parallel at intervals; the first yarn guide plate 11 has a plurality of first yarn guide holes 111 distributed at intervals, and the second yarn guide plate 12 has a plurality of second yarn guide holes 121 distributed at intervals; wherein, each first yarn guide hole 111 corresponds one-to-one with each second yarn guide hole 121, and the corresponding first yarn guide holes 111 and second yarn guide holes 121 together form a yarn guide channel; the weft stop plate 40 is located between the first yarn guide plate 11 and the second yarn guide plate 12.
[0028] The functions of the first yarn guide plate 11 and the second yarn guide plate 12 are, on the one hand, to provide a yarn guide channel by utilizing the first yarn guide hole 111 and the second yarn guide hole 121, and to provide space for the installation of the weft stop strip 30 and the weft stop piece 40; on the other hand, to improve the structural strength and stability of the yarn doubling bracket 10, and to prevent the yarn doubling bracket 10 from being deformed by force, which would affect the stability of the weft yarn entering the weft feeder 20 and the yarn doubling effect.
[0029] It should be noted that, as Figure 2 and Figure 3 As shown, the first yarn guide plate 11 is located between the second yarn guide plate 12 and the yarn inlet end of the weft feeder 20. The spacing between adjacent first yarn guide holes 111 is smaller than the spacing between adjacent second yarn guide holes 121. The weft yarns spread out on the spool 60 first pass through the second yarn guide holes 121, then through the yarn insertion holes 41 of the weft stop plate 40, and then through the first yarn guide holes 111. Finally, they are introduced into the yarn inlet hole 21 through the first yarn guide holes 111. Since the spacing between the first yarn guide holes 111 is smaller than that between the second yarn guide holes 121, the spacing between each weft yarn gradually decreases as it passes through the yarn guide channel. This is beneficial for improving the yarn doubling effect and also allows the weft stop plate 40 to obtain an inclined angle relative to the surface of the weft stop strip 30, thereby avoiding excessive friction between the weft stop plate 40 and the weft stop strip 30, which would affect its lifespan.
[0030] For details, please refer to Figure 3 The first yarn guide plate 11 has multiple first ceramic sleeves 112 spaced apart, and the inner hole of the first ceramic sleeve 112 forms a first yarn guide hole 111; the second yarn guide plate 12 has multiple second ceramic sleeves 122 spaced apart, and the inner hole of the second ceramic sleeve 122 forms a second yarn guide hole 121. Using ceramic sleeves to guide the yarn can reduce the friction between the weft yarn and the yarn guide hole, thereby reducing the probability of weft yarn breakage and improving the stability of weft yarn movement.
[0031] To further improve the yarn dotting effect, such as Figure 2 and Figure 3 As shown, the axial direction of the first yarn guide hole 111 is set at an angle to the axial direction of the yarn inlet hole 21. Each weft yarn passes through the corresponding first yarn guide hole 111 and is then inclined into the yarn inlet hole 21. This helps to improve the tightness of the weft yarns and avoids excessive gaps between yarns, which would affect the success rate of weft yarn insertion on the air-jet loom.
[0032] As one specific embodiment of the aforementioned weft stop bar 30, please refer to Figures 2 to 4 The weft stop bar 30 includes a first conductive bar 31 as a positive electrode, a second conductive bar 32 as a negative electrode, and two junction boxes 33; the two junction boxes 33 are respectively fixed on both sides of the yarn dotting support 10, and the first conductive bar 31 and the second conductive bar 32 are spaced apart vertically; wherein, the two ends of the first conductive bar 31 and the second conductive bar 32 are respectively inserted into the two junction boxes 33 and connected to the circuit inside the junction boxes 33, and the two junction boxes 33 are electrically connected to the control circuit. The function of junction box 33 here is equivalent to that of the stop-warp box mentioned above: when the weft yarn breaks and the corresponding stop-warp piece 40 falls due to its own weight, the stop-warp piece 40 simultaneously contacts the first conductive strip 31 and the second conductive strip 32, thereby realizing the conduction of the positive and negative electrodes. At this time, a closed circuit is formed in junction box 33, triggering a signal and feeding it back to the control circuit of the air-jet loom. The control circuit receives the signal and automatically controls the air-jet loom to stop. In addition, the two junction boxes 33 also provide an installation base for the first conductive strip 31 and the second conductive strip 32, improving the connection convenience and stability of the first conductive strip 31 and the second conductive strip 32 on the yarn dotting support 10.
[0033] It should be noted that you should refer to [link / reference]. Figure 4 The weft stop sheet 40 is provided with an elongated hole 42, through which the first conductive strip 31 and the second conductive strip 32 pass; wherein, the first conductive strip 31 is located above the second conductive strip 32, and both sides of the first conductive strip 31 are provided with an insulating coating 311. The weft stop bar 40 is structurally similar to the warp stop bar of the loom. The function of the elongated hole 42 is to ensure that the weft stop bar 30 is located in the lower half of the elongated hole 42 when the weft yarn passes through the threading hole 41. When the weft yarn breaks, the weft stop bar 40 falls to the upper end of the elongated hole 42 under its own weight and abuts against the upper surface of the first conductive strip 31. Since the hole wall of the elongated hole 42 is in direct contact with the side of the second conductive strip 32, the weft stop bar 40 conducts the first conductive strip 31 and the second conductive strip 32. A closed circuit is formed inside the junction box 33, which triggers the stop control signal of the air-jet loom. The purpose of providing an insulating coating 311 on both sides of the first conductive strip 31 is to prevent the hole wall of the elongated hole 42 from simultaneously contacting the first conductive strip 31 and the second conductive strip 32, which would erroneously trigger the stop control signal when the weft yarn is not broken, thus affecting the smooth operation of the air-jet loom.
[0034] Among some possible implementations, such as Figure 1As shown, the yarn doubling and weft breakage automatic stop device also includes a yarn unwinding bracket 50. The yarn unwinding bracket 50 is equipped with several support rods 51, which are used to thread the bobbins 60 and allow the weft yarn wound on the bobbins 60 to enter the yarn guide channel. Since it is a yarn doubling operation, multiple bobbins 60 need to be unwound simultaneously so that multiple yarns can pass through their respective yarn guide channels and enter the weft feeder 20. Here, the several spaced-apart support rods 51 on the yarn unwinding bracket 50 can be used to install multiple bobbins 60, which is not only simple in structure and low in cost, but also ensures that the unwinding paths of each bobbin 60 do not interfere with each other, thus improving the stability of the yarn doubling and weft insertion process.
[0035] To ensure the stability of the weft yarn unwinding on the 60-axis, and to maintain the tension of the yarn plying, such as... Figure 1 As shown, in this embodiment, the yarn spreading support 50 is also provided with a number of yarn clamping discs or yarn clamping pieces 52. The yarn clamping discs or yarn clamping pieces 52 are located between the yarn spool 60 and the yarn guide channel and provide clamping force for the weft yarn.
[0036] It should be noted that the aforementioned yarn clamping discs and yarn clamping plates 52 are both back-to-back conical discs or conical bowl structures that obtain elastic clamping force based on elastic elements. After the yarn is unwound from the bobbin 60, it obtains clamping force by passing between the back-to-back conical discs or conical bowls. On this basis, the traction tension of the weft feeder 20 is used to enable the weft yarn to pass through the yarn guide channel in a taut state. This not only improves the yarn doubling effect, but also avoids the situation where the weft stop plate 40 falls and accidentally touches the weft stop strip 30 due to insufficient weft yarn tension, thereby improving the working stability of the yarn doubling self-stop function.
[0037] Based on the same inventive concept, combined with Figures 1 to 3 It is understood that this application also provides an air-jet loom, including the above-mentioned automatic stop device for weft breakage during yarn dotting.
[0038] Compared with the prior art, the air-jet loom provided in this embodiment adopts the above-mentioned yarn-joining breakage self-stop device, which can simultaneously complete yarn joining during the process of the weft yarn entering the weft feeder 20, thereby saving yarn joining costs and improving product efficiency for multi-weft fabric products; by using the cooperation of the weft stop bar 30 and multiple weft stop plates 40, the continuity detection of each weft yarn before joining into the yarn inlet hole 21 can be completed, avoiding the problem of the air-jet loom continuing to run after a single weft yarn breaks, resulting in a large number of unqualified products, thereby improving the pass rate and quality of multi-weft fabric products.
[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A weft thread breakage and yarn doubling self-stopping device, characterized in that, include: A yarn doubling bracket is fixedly installed at the yarn inlet end of the weft feeder on an air-jet loom. Multiple yarn guide channels are distributed at intervals on the yarn doubling bracket. Each yarn guide channel is used to pass through a weft yarn and guide the weft yarn into the yarn inlet hole of the weft feeder. The weft stop bar is fixedly connected to the yarn doubling bracket and located directly above each of the yarn guide channels. The weft stop bar has positive and negative electrodes that are electrically connected to the control circuit of the air-jet loom. Multiple weft stop pieces are distributed at intervals on the weft stop strip, and each of the weft stop pieces is provided with a threading hole suitable for the corresponding weft yarn to pass through; When any of the weft yarns breaks, the corresponding weft stop piece falls under its own weight, triggering the positive and negative electrodes of the weft stop strip to conduct.
2. The automatic stop device for weft breakage during yarn dotting as described in claim 1, characterized in that, The yarn guide bracket includes a first yarn guide plate and a second yarn guide plate arranged in parallel at intervals; the first yarn guide plate has a plurality of first yarn guide holes distributed at intervals, and the second yarn guide plate has a plurality of second yarn guide holes distributed at intervals; wherein each of the first yarn guide holes corresponds one-to-one with each of the second yarn guide holes, and the corresponding first yarn guide holes and second yarn guide holes together form the yarn guide channel; the weft stop plate is located between the first yarn guide plate and the second yarn guide plate.
3. The automatic stop device for weft breakage during yarn dotting as described in claim 2, characterized in that, The first yarn guide plate is located between the second yarn guide plate and the yarn inlet end of the weft feeder, and the interval between adjacent first yarn guide holes is smaller than the interval between adjacent second yarn guide holes.
4. The automatic stop device for weft breakage during yarn dotting as described in claim 2, characterized in that, The first yarn guide plate has a plurality of first ceramic sleeves spaced apart, and the inner hole of the first ceramic sleeve forms the first yarn guide hole; the second yarn guide plate has a plurality of second ceramic sleeves spaced apart, and the inner hole of the second ceramic sleeve forms the second yarn guide hole.
5. The automatic stop device for weft breakage during yarn dotting as described in claim 2, characterized in that, The axial direction of the first yarn guide hole is set at an angle to the axial direction of the yarn inlet hole.
6. The automatic stop device for weft breakage during yarn dotting as described in claim 1, characterized in that, The weft stop bar includes a first conductive bar as a positive electrode, a second conductive bar as a negative electrode, and two junction boxes; the two junction boxes are respectively fixed on both sides of the yarn dotting support, and the first conductive bar and the second conductive bar are spaced apart vertically; wherein, the two ends of the first conductive bar and the second conductive bar are respectively inserted into the two junction boxes and connected to the circuit inside the junction boxes, and the two junction boxes are electrically connected to the control circuit.
7. The automatic stop device for yarn breakage as described in claim 6, characterized in that, The weft stop sheet has an elongated hole through which both the first conductive strip and the second conductive strip pass; wherein the first conductive strip is located above the second conductive strip, and both sides of the first conductive strip are provided with an insulating coating.
8. The automatic stop device for weft breakage during yarn dotting as described in any one of claims 1-7, characterized in that, The yarn-breaking automatic stop device also includes a yarn-loosening bracket, which is provided with several support rods. The support rods are used to thread the bobbin through and allow the weft yarn wound on the bobbin to enter the yarn-guiding channel.
9. The automatic stop device for weft breakage during yarn dotting as described in claim 8, characterized in that, The yarn spreading support is also provided with several yarn clamping discs or yarn clamping pieces, which are located between the yarn spool and the yarn guide channel and provide clamping force for the weft yarn.
10. An air-jet loom, characterized in that, Includes the automatic stop device for yarn breakage as described in any one of claims 1-9.