A loom weft failure detection device

Abstract

The utility model provides a kind of shuttle loom weft fault detection device, it is related to textile equipment, including beating weft shuttle, its inner wall is equipped with the shuttle cavity accommodating bobbin, beating weft shuttle one end is equipped with weft outlet, the shuttle cavity is equipped with the tablet installed by elastic member, tablet and bobbin outer wall are attached;Empty weft detection component, it includes hall element and magnetic steel, hall element is installed on tablet, and magnetic steel is installed on bobbin, so that bobbin drives magnetic steel to rotate every circle, and hall element senses one pulse signal;And broken detection component, it includes infrared emitter and infrared receiver, and infrared emitter and infrared receiver are oppositely arranged in weft outlet, so that the weft of weft outlet can block the infrared light emitted by infrared emitter.The utility model has the beneficial effects that the automatic detection of the two types of faults of "weft runs out" and "weft breaks" is realized, empty weft defect is completely avoided, and the range of broken weft defect is reduced.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment technology, and in particular to a weft yarn fault detection device for shuttle looms. Background Technology

[0002] Shuttle looms are commonly used equipment in the textile industry. Their core working principle involves a shuttle carrying a yarn bobbin to initiate the weft insertion, which is then combined with a beat-up mechanism to interweave the weft yarn with the warp yarn to form a fabric. In actual production, shuttle looms experience two typical weft yarn faults that directly affect fabric quality and production efficiency: Running out of weft yarn leads to empty weft defects: The number of weft yarn loops wound on the yarn bobbin is preset to a fixed value by the weft yarn guide machine. However, existing shuttle looms lack a measuring mechanism for the number of loops of the yarn bobbin. When the weft yarn on the bobbin runs out, the loom cannot detect it in time and will continue to operate and perform weft-beating actions. This results in no weft yarn participating in the weaving during that weaving cycle, forming empty weft areas. Such defects require subsequent manual cutting and repair, which not only increases labor costs but also reduces the yield of finished fabrics.

[0003] Weft yarn breakage leads to weft breakage defects: During the weft insertion process, the weft yarn needs to be drawn out from the weft insertion exit and pass through the shed. If the weft yarn breaks due to excessive tension, yarn quality problems, or mechanical friction, existing looms cannot detect it in real time. Continuous weft beating on the loom will cause the warp yarns on both sides of the breakage point to be unable to interweave with the weft yarn, forming a weft breakage area. In severe cases, it can cause malfunctions in the warp yarn entanglement mechanical parts, further increasing production losses.

[0004] To address these issues, the industry currently primarily employs manual monitoring: operators observe the remaining weft yarn amount and weft insertion status in real time, manually pressing the stop button when a fault is detected. However, this method has significant shortcomings: firstly, manual monitoring suffers from missed detections due to "visual fatigue," especially when multiple looms are running simultaneously, resulting in a significant decrease in monitoring accuracy; secondly, there is a delay in human response—by the time from detecting a fault to pressing the stop button, the loom has already completed part of the weft insertion process, still producing defective fabric. Therefore, existing weft yarn fault monitoring methods for shuttle looms can no longer meet the demands of modern textile production for automation and high quality, necessitating a solution that can automatically detect and automatically trigger a shutdown. Utility Model Content

[0005] In view of this, in order to solve the problems of existing shuttle loom weft yarn fault monitoring relying on manual labor, high defect rate and low degree of automation, the embodiments of this utility model provide a shuttle loom weft yarn fault detection device.

[0006] An embodiment of this utility model provides a weft yarn fault detection device for shuttle looms, comprising: The weft-beating shuttle has a shuttle cavity on its inner wall to accommodate the yarn tube. One end of the weft-beating shuttle has a weft insertion outlet. The shuttle cavity has a pressure plate installed by an elastic element, and the pressure plate is in contact with the outer wall of the yarn tube. The weft detection component includes a Hall element and a magnet. The Hall element is mounted on the pressure plate, and the magnet is mounted on the yarn tube, such that the Hall element senses a pulse signal for each rotation of the magnet driven by the yarn tube. And a breakage detection component, which includes an infrared emitter and an infrared receiver, the infrared emitter and the infrared receiver being respectively disposed opposite to each other at the weft insertion outlet, such that the weft yarn passing through the weft insertion outlet can block the infrared light emitted by the infrared emitter.

[0007] Furthermore, the magnet is installed at one end of the yarn tube and is located in the non-wound yarn section.

[0008] Furthermore, the shuttle cavity is provided with an installation groove, the elastic element is installed in the installation groove and connected to the pressure plate, the pressure plate is located on one side of the yarn tube and can swing radially along the yarn tube.

[0009] Furthermore, the elastic element is a spring.

[0010] Furthermore, the inner wall of the weft insertion outlet is provided with two mounting holes arranged opposite each other, and the infrared transmitter and the infrared receiver are respectively embedded in the two mounting holes.

[0011] Furthermore, the connection line between the infrared transmitter and the infrared receiver is perpendicular to the weft yarn passing through the weft insertion outlet.

[0012] Furthermore, it also includes a first signal processor, which is electrically connected to the Hall element to receive the pulse signal output by the Hall element and to accumulate and count the pulse signal.

[0013] Furthermore, it also includes a second signal processor, which is electrically connected to the infrared receiver to receive the light intensity signal output by the infrared receiver.

[0014] Furthermore, it also includes a weft breakage automatic stop controller and a loom controller. The weft breakage automatic stop controller is electrically connected to the first signal processor and the second signal processor. The weft breakage automatic stop controller is used to generate a weft yarn exhaustion signal by comparing the number of pulse signals and the weft yarn loop count threshold, to generate a weft yarn breakage signal by comparing the light intensity signal exceeding the light intensity threshold, and to send the weft yarn exhaustion signal or the weft yarn breakage signal to the loom controller. The loom controller is used to send a stop command according to the weft yarn exhaustion signal or the weft yarn breakage signal.

[0015] Furthermore, it also includes a control panel electrically connected to the loom controller. The control panel integrates a display screen, a first alarm light, and a second alarm light. The display screen is used to display a weft yarn exhaustion signal or a weft yarn breakage signal. The loom controller is used to control the first alarm light to illuminate based on the weft yarn exhaustion signal and to control the second alarm light to illuminate based on the weft yarn breakage signal.

[0016] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: 1. This utility model discloses a weft yarn fault detection device for shuttle looms. A Hall element on the pressure plate inside the weft insertion shuttle works in conjunction with a magnet on the yarn tube. During weft insertion, the weft yarn rotates, causing the yarn tube and the magnet on its surface to rotate as well. Each rotation of the magnet generates a pulse signal from the Hall element. The pulse signals are statistically analyzed to obtain the number of weft yarn rotations used, accurately measuring the number of yarn tube rotations. Combined with a preset total rotation threshold, this device can trigger a stop before the weft yarn runs out, completely avoiding empty weft defects. Furthermore, an infrared transmitter and receiver at the weft insertion exit are used. The weft yarn blocks some of the infrared light emitted by the transmitter to the receiver. The intensity of the light signal received by the receiver determines whether the weft yarn breaks when the light intensity exceeds a threshold. This achieves automatic detection of both "weft yarn exhaustion" and "weft yarn breakage" faults.

[0017] 2. The present invention provides a weft yarn fault detection device for shuttle looms, which uses a Hall sensor composed of a Hall element and a magnet to accurately measure the number of rotations of the yarn tube. Combined with a preset total number of rotations threshold, it can trigger a stop in time before the weft yarn is used up, thus completely avoiding the defect of empty weft.

[0018] 3. The present invention provides a weft yarn fault detection device for shuttle looms, which uses an infrared transmitter and an infrared receiver to monitor the weft yarn status at the weft inlet in real time. After the weft yarn breaks, it quickly outputs a signal and stops the machine quickly, reducing the range of weft breakage defects.

[0019] 4. The shuttle loom weft yarn fault detection device of this utility model has a high degree of automation and does not require manual monitoring throughout the process. The detection, signal processing and linkage shutdown of two types of faults are all completed automatically, reducing labor costs and avoiding the problems of missed detection and delays caused by manual inspection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a shuttle loom weft yarn fault detection device according to the present invention; Figure 2 This is a schematic diagram of the layout of the latitude and longitude detection components; Figure 3 This is a schematic diagram of the arrangement of the fracture detection components; Figure 4 This is a circuit diagram of a shuttle loom weft yarn fault detection device according to the present invention; Figure 5 This is a diagram of the control panel.

[0021] In the diagram: 1. Beating shuttle; 2. Empty weft detection assembly; 21. Pressing plate; 22. Hall element; 23. Magnet; 24. Yarn tube; 25. Elastic element; 3. Breakage detection assembly; 31. Infrared transmitter; 32. Infrared receiver; 4. Weft yarn; 5. Weft insertion outlet; 6. First signal processor; 7. Second signal processor; 8. Weft breakage automatic stop controller; 9. Loom controller; 10. Control panel; 101. Display screen; 102. Reset button; 103. First alarm light; 104. Second alarm light; 11. Wire. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0023] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0026] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0027] It should be further noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figure 1 An embodiment of this utility model provides a weft yarn fault detection device for shuttle looms, including a beat-up shuttle 1, a missing weft detection component 2, and a breakage detection component 3.

[0029] The inner wall of the beat-up shuttle 1 is provided with a shuttle cavity to accommodate the yarn tube 24. The yarn tube 24 is used to wind the weft yarn 4 for beat-up. When the weft yarn 4 is released, it drives the yarn tube 24 to rotate. Each rotation of the yarn tube 24 is caused by the release of the weft yarn 4. One end of the beat-up shuttle 1 is provided with a weft insertion outlet 5. The weft yarn 4 released by the yarn tube 24 is released in the shuttle cavity according to a predetermined guide path and is led out through the weft insertion outlet 5.

[0030] The shuttle cavity is equipped with a pressure plate 21 mounted via an elastic element 25, and the pressure plate 21 is in contact with the outer wall of the yarn tube 24. Specifically, the shuttle cavity is provided with a mounting groove, the elastic element 25 is mounted in the mounting groove and connected to the pressure plate 21, the pressure plate 21 is located on one side of the yarn tube 24 and can swing radially along the yarn tube 24. The side of the pressure plate 21 facing the yarn tube 24 is in contact with the outer wall of the weft yarn 4 wound on the yarn tube 24, and the friction force causes the yarn tube 24 to rotate stably and release the weft yarn 4. Preferably, the elastic element 25 is a spring.

[0031] Please refer to Figure 2The weft insertion detection component 2 includes a Hall element 22 and a magnet 23. The Hall element 22 is mounted on the pressure plate 21, and the magnet 23 is mounted on the yarn tube 24, such that the Hall element 22 senses a pulse signal for each rotation of the magnet 23 driven by the yarn tube 24. The magnet 23 is mounted at one end of the yarn tube 24 and located in the non-wound yarn section. The magnet 23 is fixed to the yarn tube 24 by adhesive bonding, and the magnet 23 rotates synchronously with the yarn tube 24. The distance between the sensing end of the Hall element 22 and the magnet 23 is very small, ensuring that the rotation of the magnet 23 can trigger the Hall element 22. For each rotation of the magnet 23, the Hall element 22 can sense a pulse signal. Thus, the number of release turns of the weft yarn 4 can be determined based on the number of sensed pulse signals. Then, the number of release turns is compared with the total number of turns of the weft yarn 4 wound on the yarn tube 24. When the number of release turns reaches the total number of turns of the weft yarn 4 wound on the yarn tube 24, it means that the weft yarn 4 has been used up.

[0032] Please refer to Figure 3 The breakage detection component 3 includes an infrared emitter 31 and an infrared receiver 32. The infrared emitter 31 and the infrared receiver 32 are respectively disposed opposite to each other at the weft insertion outlet 5, so that the weft yarn 4 passing through the weft insertion outlet 5 can block the infrared light emitted by the infrared emitter 31. Specifically, the inner wall of the weft insertion outlet 5 has two oppositely disposed mounting holes, and the infrared emitter 31 and the infrared receiver 32 are respectively inserted into the two mounting holes by snap-fit. To ensure that the weft yarn 4 can block the infrared light emitted by the infrared emitter 31, the connecting line between the infrared emitter 31 and the infrared receiver 32 is perpendicular to the weft yarn 4 passing through the weft insertion outlet 5.

[0033] When the weft yarn 4 is normally drawn out from the weft outlet 5, the weft yarn 4 blocks part of the infrared light, and the light intensity signal received by the infrared receiver 32 is weak; however, when the weft yarn 4 breaks, the infrared light is unblocked, and the light intensity signal received by the infrared receiver 32 is enhanced; therefore, the strength of the light intensity signal received by the infrared receiver 32 can be used to determine whether the weft yarn 4 is broken.

[0034] Please refer to Figure 4To efficiently process the detection results of the empty weft detection component 2, the shuttle loom weft yarn fault detection device of this utility model further includes a first signal processor 6, which is a common signal processor integrating a pulse counting unit. The first signal processor 6 is electrically connected to the Hall element 22, and in this embodiment, the electrical connection is via wire 11. The first signal processor 6 is used to receive the pulse signal output by the Hall element 22 and accumulate and count the pulse signal. Each rotation of the yarn tube 24 releases one loop of weft yarn 4, and the magnet 23 triggers the Hall element 22 to output a pulse. The first signal processor 6 receives the pulse signal output by the Hall element 22 and accumulates and counts the pulse signal to obtain the number of loops of weft yarn 4 released.

[0035] To efficiently process the detection results of the breakage detection component 3, the shuttle loom weft yarn fault detection device of this invention further includes a second signal processor 7, which is a common signal processor with an integrated light intensity acquisition unit. The second signal processor 7 is electrically connected to the infrared receiver 32 to receive the light intensity signal output by the infrared receiver 32.

[0036] Furthermore, to enable the loom to stop or prevent restarting based on fault conditions, this utility model's shuttle loom weft yarn fault detection device further includes a weft breakage automatic stop controller 8 and a loom controller 9. The weft breakage automatic stop controller 8 is electrically connected to the first signal processor 6 and the second signal processor 7. The weft breakage automatic stop controller 8 is used to generate a weft yarn exhaustion signal by comparing the number of pulse signals and the weft yarn 4 turn count threshold, to generate a weft yarn 4 breakage signal by comparing the light intensity signal exceeding the light intensity threshold, and to send the weft yarn 4 exhaustion signal or weft yarn 4 breakage signal to the loom controller 9. The weft yarn 4 turn count threshold is the total number of weft yarn 4 turns wound on the yarn tube 24. The output terminal of the loom controller 9 is electrically connected to the loom's main shaft motor and braking mechanism. Upon receiving the weft yarn 4 exhaustion signal or the weft yarn 4 breakage signal, the loom controller 9 sends a stop command, controls the main shaft motor to de-energize, and simultaneously activates the braking mechanism to quickly stop the loom.

[0037] In addition, please refer to Figure 5In some embodiments, the shuttle loom weft yarn fault detection device of this utility model further includes a control panel 10, which is electrically connected to the loom controller 9. The control panel 10 integrates a display screen 101, a first alarm light 103, and a second alarm light 104. The display screen 101 is used to display a weft yarn 4 exhaustion signal or a weft yarn 4 breakage signal. The loom controller 9 is used to control the first alarm light 103 to light up based on the weft yarn 4 exhaustion signal and to control the second alarm light 104 to light up based on the weft yarn 4 breakage signal. The first alarm light 103 and the second alarm light 104 can use different colors of light to distinguish the cause of the fault, such as the first alarm light 103 being red and the second alarm light 104 being yellow. In this way, the first alarm light 103 and the second alarm light 104 can display the weft yarn 4 fault type in real time, clearly indicating the cause of the fault, realizing visual feedback of fault information, and facilitating operators to quickly locate and handle the problem. The control panel 10 can also integrate a reset button 102, which is used to control the weft breakage controller to clear the fault signal and achieve a reset.

[0038] This utility model discloses a weft yarn fault detection device for a shuttle loom, which performs weft yarn 4 exhaustion detection during weft operation: the yarn tube 24 rotates stably under the friction of the pressure plate 21 to release the weft yarn 4, the magnet 23 rotates synchronously with the yarn tube 24, and the Hall element 22 outputs a pulse signal for each rotation of the yarn tube 24. The first signal processor 6 receives the pulse signal and accumulates the count of the pulse signal. When the accumulated count reaches the preset threshold of the number of weft yarn 4 turns (the total number of turns of weft yarn 4 wrapped on the yarn tube 24), the first signal processor 6 sends a weft yarn 4 exhaustion signal to the weft breakage automatic stop controller 8, and the weft breakage automatic stop controller 8 sends a stop command to the loom controller 9, thereby controlling the loom to stop quickly.

[0039] This utility model discloses a weft yarn fault detection device for shuttle looms, which detects weft yarn 4 breakage during weft operation: During normal weft insertion, the weft yarn 4 passes through the weft insertion outlet 5, blocking part of the infrared light emitted by the infrared emitter 31. The infrared receiver 32 receives the infrared light and outputs a light intensity signal. The second signal processor determines that the weft yarn 4 is normal. If the weft yarn 4 breaks during weft insertion, there is no weft yarn 4 blocking the weft insertion outlet 5. The infrared light intensity signal received by the infrared receiver 32 increases, and the second signal processor 7 sends a weft yarn 4 breakage signal to the weft breakage automatic stop controller 8. After receiving the signal, the weft breakage automatic stop controller 8 sends a stop command to the loom controller 9, thereby controlling the loom to stop quickly.

[0040] After the loom stops, the operator can replace the new yarn tube 24 (when the weft yarn is used up) or reconnect the weft yarn 4 (when the weft yarn is broken) and then restart the loom.

[0041] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0042] Where there is no conflict, the embodiments and features described above can be combined with each other. 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, improvements, etc., 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 failure detection device for a loom, characterized in that, include: The weft-beating shuttle has a shuttle cavity on its inner wall to accommodate the yarn tube. One end of the weft-beating shuttle has a weft insertion outlet. The shuttle cavity has a pressure plate installed by an elastic element, and the pressure plate is in contact with the outer wall of the yarn tube. The weft detection component includes a Hall element and a magnet. The Hall element is mounted on the pressure plate, and the magnet is mounted on the yarn tube, such that the Hall element senses a pulse signal for each rotation of the magnet driven by the yarn tube. And a breakage detection component, which includes an infrared emitter and an infrared receiver, the infrared emitter and the infrared receiver being respectively disposed opposite to each other at the weft insertion outlet, such that the weft yarn passing through the weft insertion outlet can block the infrared light emitted by the infrared emitter.

2. A weft thread breakage detection device for a loom as claimed in claim 1, characterized in that: The magnet is installed at one end of the yarn tube and is located in the non-wound yarn section.

3. A weft thread breakage detection device for a loom as claimed in claim 1, characterized in that: The shuttle cavity is provided with an installation groove, the elastic element is installed in the installation groove and connected to the pressure plate, the pressure plate is located on one side of the yarn tube and can swing radially along the yarn tube.

4. A weft thread breakage detection device for a loom as defined in claim 1, characterized in that: The elastic element is a spring.

5. A weft thread breakage detection device for a loom as defined in claim 1, characterized in that: The inner wall of the weft insertion outlet is provided with two mounting holes arranged opposite each other, and the infrared transmitter and the infrared receiver are respectively embedded in the two mounting holes.

6. A weft thread breakage detection device for a loom as defined in claim 1, characterized in that: The connection line between the infrared transmitter and the infrared receiver is perpendicular to the weft yarn passing through the weft insertion outlet.

7. A weft thread breakage detection device for a loom as defined in claim 1, characterized in that: It also includes a first signal processor, which is electrically connected to the Hall element to receive the pulse signal output by the Hall element and to accumulate and count the pulse signal.

8. A weft thread breakage detection device for a loom as claimed in claim 7, characterized in that: It also includes a second signal processor, which is electrically connected to the infrared receiver to receive the light intensity signal output by the infrared receiver.

9. A weft fault detection device for a loom as claimed in claim 8, characterized in that: It also includes a weft breakage automatic stop controller and a loom controller. The weft breakage automatic stop controller is electrically connected to the first signal processor and the second signal processor. The weft breakage automatic stop controller is used to generate a weft yarn exhaustion signal by comparing the number of pulse signals and the weft yarn loop count threshold, to generate a weft yarn breakage signal by comparing the light intensity signal exceeding the light intensity threshold, and to send the weft yarn exhaustion signal or the weft yarn breakage signal to the loom controller. The loom controller is used to send a stop command according to the weft yarn exhaustion signal or the weft yarn breakage signal.

10. A weft thread breakage detection device for a loom as claimed in claim 9, characterized in that: It also includes a control panel, which is electrically connected to the loom controller. The control panel integrates a display screen, a first alarm light, and a second alarm light. The display screen is used to display a weft yarn exhaustion signal or a weft yarn breakage signal. The loom controller is used to control the first alarm light to illuminate based on the weft yarn exhaustion signal and to control the second alarm light to illuminate based on the weft yarn breakage signal.

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