Broken warp detection device of warp knitting machine
By designing a warp breakage detection device that includes a guide roller, a pressure roller, and a laser sensor, the problem of timely detection of warp breakage during warp knitting machine weaving was solved, thereby improving the stability and quality of the weaving process.
Patent Information
- Application Number
- CN202520259591.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Warp yarns are prone to breakage during the weaving process of warp knitting machines, resulting in defective fabrics. Existing technology makes it difficult to detect and stop the machine in a timely manner.
Design a warp breakage detection device that uses a laser sensor and a swing arm to detect warp breakage. The sensor transmits the signal to the warp knitting machine controller to stop the machine. The device includes a guide roller, a pressure roller, and a swing arm to ensure the stability and reliability of the detection.
It enables timely detection and shutdown of warp yarn breakage, improving weaving stability, reducing defective fabrics, and ensuring weaving quality.
Smart Images
Figure CN223893003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of warp knitting machine technology, and in particular to a warp breakage detection device for a warp knitting machine. Background Technology
[0002] In existing technology, the warp yarns of a warp knitting machine move rapidly with the fabric during the weaving process, and the warp yarns are under tension during weaving, so warp yarn breakage is common. Once a warp yarn breaks and is not detected in time, it will result in defective fabric and affect the weaving quality. Utility Model Content
[0003] To address the aforementioned technical deficiencies, this invention provides a warp breakage detection device for a warp knitting machine. This device can detect warp breakage in a timely manner and transmit a signal to the warp knitting machine so that the machine can be stopped promptly.
[0004] This utility model discloses a warp breakage detection device for a warp knitting machine, including a mounting frame. The mounting frame is a rod with both ends extending downwards. U-shaped mounting grooves are provided at both ends of the mounting frame, with the openings of the U-shaped mounting grooves facing downwards. Guide wheels are provided in the U-shaped mounting grooves, and the warp threads of the warp knitting machine pass through the guide wheels. A connecting frame is provided extending downwards in the middle of the mounting frame, and a rotating shaft is provided on the connecting frame. A swing rod is provided on the rotating shaft, and a pressure roller is provided at the end of the swing rod. A vertically downward-facing laser sensor is provided on the mounting frame on the side of the connecting frame. When the pressure roller is located on the warp thread between the guide wheels, the swing rod is positioned horizontally directly below the laser sensor.
[0005] The circumferential surfaces of the guide roller and the pressure roller are both formed with V-shaped inner grooves.
[0006] A wheel seat is provided at the end of the swing rod, and the pressure roller is set inside the wheel seat. The wheel seat and the swing rod are an integral structure, and the width of the wheel seat gradually decreases from bottom to top.
[0007] A notch is provided on the mounting bracket on one side of the U-shaped mounting groove, the notch allowing the warp yarn to enter the U-shaped mounting groove.
[0008] The warp breakage detection device for a warp knitting machine obtained by this invention places the pressure roller and the swing rod on the taut warp yarn. When the warp yarn breaks, the swing rod naturally moves downward. The infrared sensor detects the downward movement of the swing rod and transmits the signal to the controller of the warp knitting machine to determine that the warp yarn corresponding to the swing rod has broken. The machine is stopped in time, which can effectively improve the stability of weaving, ensure the quality of weaving, and reduce the number of defective fabrics. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;
[0010] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 . Detailed Implementation
[0011] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0012] Example 1:
[0013] like Figure 1 , Figure 2 As shown, this utility model discloses a warp breakage detection device for a warp knitting machine, including a mounting frame 1. The mounting frame 1 is a rod with both ends extending downwards. U-shaped mounting grooves 2 are provided at both ends of the mounting frame 1. The openings of the U-shaped mounting grooves 2 are downwards. Guide wheels 3 are provided in the U-shaped mounting grooves 2. The warp threads of the warp knitting machine pass through the guide wheels 3. A connecting frame 4 is provided extending downwards in the middle of the mounting frame 1. A rotating shaft is provided on the connecting frame 4. A swing rod 5 is provided on the rotating shaft. A pressure roller 7 is provided at the end of the swing rod 5. A vertically downward laser sensor 8 is provided on the mounting frame 1 on the side of the connecting frame 4. When the pressure roller 7 is located on the warp thread between the guide wheels 3, the swing rod 5 is horizontally positioned directly below the laser sensor 8.
[0014] A mounting bracket 1 is installed on the path of each warp yarn 9 on the frame of the warp knitting machine. Mounting brackets 1 corresponding to adjacent warp yarns 9 do not interfere with each other. The fixing method of the mounting bracket 1 on the frame of the warp knitting machine can be selected according to actual needs, such as by screw connection. The laser sensor 8 is a known existing product. The laser sensor 8 is used to sense whether there is a swing arm 5 blocking the light emitted by it below. Simultaneously, the laser sensor 8 is connected to the controller of the warp knitting machine via a signal line. The sensing signal of the laser sensor 8 is transmitted to the controller of the warp knitting machine, and its sensing signal is the yarn breakage signal. When the warp knitting machine receives the yarn breakage signal, it automatically stops and displays the position of the warp yarn 9 corresponding to the laser sensor 8 for the worker to reconnect. In actual use, the warp yarn 9 passes through the two guide rollers 3 and is in a taut state. At this time, the pressure roller 7 on the swing arm 5 is placed on the taut warp yarn 9, and the swing arm 5 is in a relatively lateral state and located below the laser sensor 8, so the laser sensor 8 can detect the presence of the swing arm 5. Once the warp yarn 9 breaks, there is no support below the swing rod 5. At this time, under the action of gravity, the swing rod 5 moves down to a basically vertical state. The infrared sensor then senses that there is no swing rod 5 below it, and sends a signal to the controller of the warp knitting machine.
[0015] The swing rod 5 and pressure roller 7 can be made of lightweight materials, which can reduce the force applied to the tensioned warp 9 and ensure the stability of the warp 9 during the conveying process.
[0016] Both the guide roller 3 and the pressure roller 7 have V-shaped inner grooves formed on their circumferential surfaces. With V-shaped inner grooves on both the guide roller 3 and the pressure roller 7, the warp yarn 9 is stably fed within these grooves, preventing warp yarn 9 from fluctuating and ensuring that the pressure roller 7 is stably positioned on the warp yarn 9, resulting in a stable and reliable detection process.
[0017] A wheel seat 6 is provided at the end of the swing rod 5, and the pressure roller 7 is disposed inside the wheel seat 6. The wheel seat 6 and the swing rod 5 are an integral structure, and the width of the wheel seat 6 gradually decreases from bottom to top. By using the wheel seat 6 to install the pressure roller 7, and with the upper end of the wheel seat 6 being narrow and the lower end being wide, the swing rod 5 is located at the bottom after the warp yarn 9 begins. At this time, simply rotating the swing rod 5 upwards will move the swing rod 5 above the warp yarn 9. The reasonable design of the wheel seat 6 can effectively avoid interference between the wheel seat 6 and the warp yarn 9, making the swing rod 5 return to its original position and making the process of moving the pressure roller 7 above the warp yarn 9 simpler and more convenient.
[0018] A notch 10 is provided on the mounting frame 1 on one side of the U-shaped mounting groove 2, allowing the warp yarn 9 to enter the U-shaped mounting groove 2. When the warp yarn 9 begins to move, it needs to be moved above the guide roller 3. Since the mounting frame 1 is above it, a closed annular structure is formed between the guide roller 3 and the U-shaped mounting groove of the mounting frame 1. Therefore, the warp yarn 9 needs to pass through this annular structure, making yarn threading cumbersome and affecting efficiency. Therefore, this solution provides a notch 10 on the mounting frame 1 at the corresponding location of the U-shaped mounting groove 2. The warp yarn 9 can then directly enter the U-shaped mounting groove 2 through the notch 10 and be positioned above the guide roller 3, making operation simpler and more convenient, and greatly improving the yarn threading efficiency of the warp yarn 9.
[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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. Furthermore, 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 with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A warp breakage detection device for a warp knitting machine, comprising a mounting frame, characterized in that: The mounting frame is a rod extending downwards at both ends. U-shaped mounting grooves are provided at both ends of the mounting frame, with the openings of the U-shaped mounting grooves facing downwards. Guide wheels are installed within the U-shaped mounting grooves, through which the warp threads of the warp knitting machine pass. A connecting frame extends downwards from the middle of the mounting frame, and a rotating shaft is installed on the connecting frame. A swing rod is installed on the rotating shaft, and a pressure roller is installed at the end of the swing rod. A vertically downward-facing laser sensor is installed on the mounting frame on the side of the connecting frame. When the pressure roller is located on the warp thread between the guide wheels, the swing rod is positioned horizontally directly below the laser sensor.
2. The warp breakage detection device for a warp knitting machine according to claim 1, characterized in that: The circumferential surfaces of the guide roller and the pressure roller are both formed with V-shaped inner grooves.
3. A warp breakage detection device for a warp knitting machine according to claim 1 or 2, characterized in that: A wheel seat is provided at the end of the swing rod, and the pressure roller is set inside the wheel seat. The wheel seat and the swing rod are an integral structure, and the width of the wheel seat gradually decreases from bottom to top.
4. The warp breakage detection device for a warp knitting machine according to claim 1, characterized in that: A notch is provided on the mounting bracket on one side of the U-shaped mounting groove, the notch allowing the warp yarn to enter the U-shaped mounting groove.