A yarn breakage automatic stop device for a yarn-dyed fabric loom

Abstract

This utility model relates to the field of textile processing technology and discloses a yarn breakage self-stop device for a yarn-dyed fabric loom. It includes: a U-shaped frame; a first mounting frame and a second mounting frame movably disposed within the U-shaped frame; a movable main roller rotatably mounted within the first mounting frame; a movable auxiliary roller rotatably mounted within the second mounting frame; a fixed auxiliary roller rotatably mounted on the inner sidewall of the U-shaped frame; a first electrical connecting block embedded at the top of the first mounting frame; and a second electrical connecting block embedded at the top of the inner side of the U-shaped frame. This yarn breakage self-stop device for a yarn-dyed fabric loom works by having the conveying yarn pass sequentially below the fixed auxiliary roller, above the movable main roller, and below the movable auxiliary roller. When the conveying yarn breaks, the movable main roller loses the tension support of the yarn and moves rapidly upward under its own weight or the action of an elastic reset component. The two electrical connecting blocks contact, immediately triggering a textile stop signal, achieving immediate stop upon yarn breakage and effectively preventing fabric defects.

Description

Technical Field

[0001] This utility model relates to the field of textile processing technology, and in particular to an automatic stop device for yarn breakage on a yarn-dyed fabric loom. Background Technology

[0002] In the production of yarn-dyed fabrics, the stable operation of the loom is crucial for product quality and production efficiency. However, warp and weft yarns are prone to breakage during weaving due to various factors, such as yarn quality defects, wear and tear of mechanical parts, and improper tension control. Traditional yarn-dyed fabric looms lack precise and efficient automatic stop devices for yarn breakage. The loom continues to operate after a yarn breakage, leading to fabric defects such as voids at warp breaks and horizontal stripes at weft breaks, significantly reducing product yield and increasing production costs. Moreover, due to the large number of warp and weft yarns, rapid location of breakage is difficult, posing significant challenges to subsequent repair work and severely impacting production progress.

[0003] CN220012936U discloses an automatic stop device for yarn breakage on a sisal spinning machine. The device includes a mounting plate, a guide frame connected to the mounting plate, a support ring inside the guide frame, a connecting ring sleeved on the outside of the support ring, and a protective sleeve sleeved on the outside of the connecting ring. Sisal yarn runs through the surface of the support ring, and a base frame is connected to the bottom of the guide frame. Through the guide frame, support ring, connecting ring, protective ring, magnetic block, and micro switch, the support ring is supported on the outside of the sisal yarn. The Teflon material has self-lubricating properties, which can prevent the sisal yarn from being worn off by the support ring to a certain extent. When the sisal yarn breaks, the support ring, connecting ring, and protective sleeve fall due to gravity. At this time, the guide frame guides the support ring and prevents it from being lost. The protective sleeve then buffers and protects the support ring and connecting ring, thereby reducing waste. Simultaneously, the micro switch only activates the emergency stop system when in contact with the magnetic block, effectively saving energy.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when the above-mentioned devices are used, the magnetic attraction between the magnetic block and the connecting ring has high maintenance costs, is easily interfered with, and is prone to failure due to misalignment. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of easy mismatch between the magnetic block and the connecting ring, which leads to failure. To this end, we propose a yarn breakage automatic stop device for yarn-dyed fabric looms.

[0006] To achieve the above objectives, this application adopts the following technical solution: a yarn breakage self-stop device for a yarn-dyed fabric loom, comprising: a U-shaped frame, a first mounting frame and a second mounting frame movably disposed within the U-shaped frame, a movable main roller rotatably mounted within the first mounting frame, a movable auxiliary roller rotatably mounted within the second mounting frame, a fixed auxiliary roller rotatably mounted on the inner side wall of the U-shaped frame, a conveying yarn disposed within the U-shaped frame, the conveying yarn passing sequentially below the fixed auxiliary roller, above the movable main roller and below the movable auxiliary roller, a first electrical connecting block embedded in the top of the first mounting frame, and a second electrical connecting block embedded in the top of the U-shaped frame, wherein weaving stops when the first electrical connecting block contacts the second electrical connecting block.

[0007] Preferably, the movable auxiliary roller and the fixed auxiliary roller are symmetrically arranged on both sides of the outside of the first mounting frame, and both the movable auxiliary roller and the fixed auxiliary roller are located below the movable main roller. When the conveyed yarn breaks, the first electrical connecting block and the second electrical connecting block come into contact.

[0008] Preferably, the outer side of the first mounting frame is provided with an elastic reset component that resets the first mounting frame when the conveying yarn breaks, and the outer side of the second mounting frame is provided with a drive component that drives the second mounting frame to move up and down.

[0009] Preferably, the elastic reset assembly includes a pair of fixing plates, which are symmetrically arranged on both sides of the first mounting frame. The pair of fixing plates are fixedly installed on the inner side wall of the U-shaped frame. Several fixing blocks are symmetrically fixedly installed at both ends of the first mounting frame. Fixing columns are fixedly installed at the bottom ends of the fixing blocks. The fixing columns slide through the fixing plates. Blocking blocks are fixedly installed at the bottom ends of the fixing plates. Reset springs are sleeved on the fixing columns. The reset springs are elastically connected between the top surface of the fixing plate and the bottom surface of the fixing block.

[0010] Preferably, the drive assembly includes a fixed mounting plate, which is disposed above the second mounting frame and is fixedly mounted on the inner side wall of the U-shaped frame. A first fixed sleeve block is fixedly mounted on one side of the second mounting frame. A threaded rod is rotatably mounted between the fixed mounting plate and the inner bottom surface of the U-shaped frame, and the first fixed sleeve block is threaded onto the threaded rod.

[0011] Preferably, a forward and reverse motor is fixedly installed at the top of the fixed mounting plate, and the output shaft of the forward and reverse motor is coaxially and fixedly connected to the threaded rod. A second fixed sleeve block is fixedly installed on the other side of the second mounting bracket. A limit rod is fixedly installed between the fixed mounting plate and the inner bottom surface of the U-shaped frame, and the second fixed sleeve block is slidably sleeved on the limit rod.

[0012] The technical effects and advantages of this utility model are as follows: In this invention, the conveying yarn passes sequentially below the fixed auxiliary roller, above the movable main roller, and below the movable auxiliary roller, creating a downward tension on the movable main roller during normal operation. When the conveying yarn breaks, the movable main roller loses the tension support of the yarn and moves rapidly upward under its own weight or the action of the elastic reset component. This causes the first electrical connecting block at the top of the first mounting frame to contact the second electrical connecting block at the top of the inner ring frame, immediately triggering a textile stop signal. This achieves immediate stop upon yarn breakage, effectively preventing fabric defects and improving production efficiency and product quality.

[0013] This invention employs a combination of mechanical linkage and electrical triggering, resulting in a simple and clear structural design. The main components are rollers, mounting frames, and electrical connecting blocks, making it easy to manufacture and install. The tension change caused by yarn breakage is direct and significant. The stop signal is triggered by the displacement of the movable main roller, avoiding misjudgments or missed detections due to environmental interference or insufficient sensor sensitivity, thus ensuring the accuracy of yarn breakage detection and the reliability of the device's operation. By adjusting the position of the second mounting frame using a drive assembly, the height of the movable auxiliary roller can be flexibly adjusted to adapt to yarns of different thicknesses or materials, as well as textile processes with different tension requirements, improving the applicability and versatility of the device. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 4 This is a schematic diagram of the internal side structure of this utility model; Figure 5 This is a schematic diagram of the elastic reset component of this utility model; Figure 6 This is a schematic diagram of the drive component structure of this utility model.

[0015] Legend: 1. Recurved frame; 2. First mounting frame; 21. Movable main roller; 3. Second mounting frame; 31. Movable auxiliary roller; 4. Fixed auxiliary roller; 5. Conveying yarn; 6. First electrical connection block; 7. Second electrical connection block; 8. Elastic reset assembly; 81. Fixing plate; 82. Fixing block; 83. Fixing column; 84. Blocking block; 85. Reset spring; 9. Drive assembly; 91. Fixed mounting plate; 92. First fixing sleeve block; 93. Threaded rod; 94. Forward and reverse motor; 95. Second fixing sleeve block; 96. Limiting rod. Detailed Implementation

[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0017] Reference Figures 1-4 As shown, this utility model provides a technical solution: a yarn breakage self-stop device for a yarn-dyed fabric loom, comprising: a spiral frame 1. The spiral frame 1 provides a stable support structure for the device. Inside the spiral frame 1, a first mounting bracket 2 and a second mounting bracket 3 are movably arranged. This movable arrangement allows the first mounting bracket 2 and the second mounting bracket 3 to move within a certain range within the spiral frame 1 in response to changes in the state of the yarn.

[0018] Specifically, a movable main roller 21 is rotatably mounted inside the first mounting frame 2. The movable main roller 21 is the core detection component of this device, and its position and movement directly reflect the tension of the conveyed yarn 5. A movable auxiliary roller 31 is rotatably mounted inside the second mounting frame 3. The movable auxiliary roller 31 cooperates with the movable main roller 21 to guide the path of the conveyed yarn 5. In addition, a fixed auxiliary roller 4 is rotatably mounted on the inner wall of the U-shaped frame 1. The fixed auxiliary roller 4 serves as a fixed guide roller and, together with the movable main roller 21 and the movable auxiliary roller 31, constitutes the conveying path of the conveyed yarn 5.

[0019] The key to this device lies in the way the conveying yarn 5 is wound. The conveying yarn 5 passes sequentially below the fixed auxiliary roller 4, above the movable main roller 21, and below the movable auxiliary roller 31. During normal spinning, the conveying yarn 5, under tension, presses downward against the movable main roller 21, keeping it in a lower position. When the conveying yarn 5 breaks, the movable main roller 21 loses the downward tension of the yarn and moves upward under its own weight or a restoring force.

[0020] To detect this displacement of the movable main roller 21, the device has a first electrical connecting block 6 embedded in the top of the first mounting frame 2, and a second electrical connecting block 7 embedded in the inner top of the U-shaped frame 1. These two electrical connecting blocks are normally separated. When the conveying yarn 5 breaks, the movable main roller 21 moves upward, causing the first mounting frame 2 to move upward, bringing the first electrical connecting block 6 into contact with the second electrical connecting block 7. Once these two electrical connecting blocks contact, a closed circuit is formed, triggering a textile stop signal, thereby immediately stopping the loom and effectively preventing fabric defects caused by yarn breakage.

[0021] In a preferred embodiment, the movable auxiliary roller 31 and the fixed auxiliary roller 4 are symmetrically arranged on both sides of the outer side of the first mounting frame 2, and both the movable auxiliary roller 31 and the fixed auxiliary roller 4 are located below the movable main roller 21. This symmetrical layout, located below the movable main roller 21, ensures that the conveying yarn 5 generates a stable downward tension on the movable main roller 21 during normal operation, guaranteeing that the movable main roller 21 is in a lower position when the yarn is normal. When the conveying yarn 5 breaks, the movable main roller 21 loses the tension support of the yarn and can move upward quickly and reliably, causing the first electrical connecting block 6 to contact the second electrical connecting block 7, thereby triggering a stop signal in a timely manner. This layout optimizes the yarn path and improves the sensitivity and reliability of yarn breakage detection.

[0022] It should be noted that the connection between the first electrical connection block 6 and the second electrical connection block 7 controls the on / off state of the circuit, and the on / off state of the circuit controls the operation of the loom. The electrical connection structure between the first electrical connection block 6 and the second electrical connection block 7 and the loom is an existing mature technology and is not the key technical point of this utility model. It will not be elaborated here.

[0023] To ensure that the first mounting frame 2 can quickly reset and trigger a stop signal when the conveying yarn 5 breaks, in a preferred embodiment of the present invention, such as... Figure 4 As shown, an elastic reset component 8 is provided on the outer side of the first mounting frame 2. This elastic reset component 8 provides an upward reset force when the conveying yarn 5 breaks, quickly pushing the first mounting frame 2 towards the second electrical connection block 7, ensuring timely automatic stop upon yarn breakage. Simultaneously, to adapt to yarns of different thicknesses or materials, and textile processes with varying tension requirements, the present invention provides a drive component 9 on the outer side of the second mounting frame 3. This drive component 9 can drive the second mounting frame 3 to move up and down, thereby adjusting the height of the movable auxiliary roller 31, and thus changing the tension of the conveying yarn 5 on the movable main roller 21, allowing the device to flexibly adapt to different textile conditions.

[0024] Furthermore, such as Figure 5As shown, the elastic reset assembly 8 includes a pair of fixing plates 81, which are symmetrically arranged on both sides of the first mounting frame 2 and fixedly installed on the inner sidewall of the U-shaped frame 1. Several fixing blocks 82 are symmetrically fixedly installed at both ends of the first mounting frame 2, and fixing posts 83 are fixedly installed at the bottom ends of these fixing blocks 82. The fixing posts 83 slide through the fixing plates 81. Blocking blocks 84 are fixedly installed at the bottom ends of the fixing plates 81 to restrict the downward movement of the fixing posts 83. Reset springs 85 are fitted onto each of the fixing posts 83, and these reset springs 85 are elastically connected between the top surface of the fixing plates 81 and the bottom surface of the fixing blocks 82. When the conveying yarn 5 is running normally, the yarn tension presses the movable main roller 21 and the first mounting frame 2 downwards, compressing the reset springs 85. When the conveying yarn 5 breaks, the yarn tension disappears, and the return spring 85 immediately extends, pushing the fixing block 82 and the fixing post 83 upward. This causes the first mounting bracket 2 to move upward, making the first electrical connecting block 6 contact the second electrical connecting block 7, thus achieving rapid yarn breakage self-stop. This structural design is simple and reliable, and the return force is stable.

[0025] In another preferred embodiment, such as Figure 4 As shown, the drive assembly 9 includes a fixed mounting plate 91, which is positioned above the second mounting bracket 3 and fixedly mounted on the inner wall of the U-shaped frame 1. A first fixed sleeve block 92 is fixedly mounted on one side of the second mounting bracket 3. A threaded rod 93 is rotatably mounted between the fixed mounting plate 91 and the inner bottom surface of the U-shaped frame 1. The first fixed sleeve block 92 is threaded onto the threaded rod 93. By rotating the threaded rod 93, the first fixed sleeve block 92 moves up and down along the threaded rod 93, thereby driving the second mounting bracket 3 to move up and down, realizing the height adjustment of the movable auxiliary roller 31.

[0026] To achieve precise rotation of the threaded rod 93 and stable movement of the second mounting bracket 3, such as Figure 6 As shown, a reversible motor 94 is fixedly mounted on the top of the mounting plate 91. The output shaft of the reversible motor 94 is coaxially and fixedly connected to the threaded rod 93. By controlling the rotation direction and speed of the reversible motor 94, the rotation of the threaded rod 93 can be precisely controlled, thereby achieving precise up-and-down movement of the second mounting bracket 3. To further improve the stability of the movement of the second mounting bracket 3 and prevent it from deflecting, a second fixing block 95 is fixedly mounted on the other side of the second mounting bracket 3. A limit rod 96 is fixedly mounted between the mounting plate 91 and the inner bottom surface of the U-shaped frame 1. The second fixing block 95 is slidably sleeved on the limit rod 96. The limit rod 96 provides guidance and support for the second mounting bracket 3, ensuring that it remains stable during up-and-down movement, thus improving the overall stability and reliability of the device.

[0027] Normal working status: When the loom is running normally and the conveying yarn 5 is in a continuous state, the conveying yarn 5 passes sequentially below the fixed auxiliary roller 4, above the movable main roller 21, and below the movable auxiliary roller 31. Due to the tension of the conveying yarn 5, the movable main roller 21 is subjected to downward pressure, causing the first mounting frame 2 to move downward and compress the return spring 85 in the elastic return assembly 8. At this time, the first electrical connecting block 6 at the top of the first mounting frame 2 remains separated from the second electrical connecting block 7 at the top of the inner end of the loop frame 1, and the loom continues to operate normally.

[0028] Yarn breakage detection and stop: When the conveying yarn 5 breaks, the tension of the conveying yarn 5 acting on the movable main roller 21 disappears instantly. At this time, the movable main roller 21 loses its downward pressure support. Under the elastic restoring force of the return spring 85 in the elastic restoring assembly 8, the first mounting frame 2 moves upward rapidly. When the first mounting frame 2 moves upward to a certain position, the first electrical connecting block 6 embedded in its top end contacts the second electrical connecting block 7 embedded in the top end of the loop frame 1. The contact of these two electrical connecting blocks immediately forms a closed circuit, sending a stop signal to the loom's control system. After receiving the stop signal, the loom will immediately stop running.

[0029] Height Adjustment and Adaptability: To accommodate yarns of different thicknesses and materials, or different textile process requirements, this device offers an adjustable function. The threaded rod 93 is driven to rotate by the forward / reverse motor 94 in the drive assembly 9. The threaded rod 93 causes the first fixed sleeve 92, which is threaded onto it, to move up and down. Since the first fixed sleeve 92 is fixed to the second mounting frame 3, the second mounting frame 3 moves up and down accordingly, thereby changing the height of the movable auxiliary roller 31. The change in the height of the movable auxiliary roller 31 affects the envelope angle and tension of the conveyed yarn 5 on the movable main roller 21, thus allowing adjustment of the yarn breakage detection sensitivity or adaptation to the tension characteristics of different yarns according to actual needs.

[0030] For rovings, such as cotton yarn and coarse-count polyester yarn, which have a larger diameter and higher strength, a higher normal tension is required. During adaptation, the second mounting frame 3 and the movable auxiliary roller 31 move downwards. This makes the conveying yarn 5 path tighter, increasing the downward pressure on the movable main roller 21, increasing the compression of the return spring 85 in the elastic reset assembly 8, and raising the initial tension. This prevents the movable main roller 21 from being accidentally triggered due to roving loosening, and the return spring 85 has a greater rebound force when yarn breaks, ensuring that the movable main roller 21 moves upwards quickly to trigger a stop. For fine yarns, such as silk and fine-count cotton yarn, which have a smaller diameter and lower strength, a lower tensile strength, during adaptation, the first fixed sleeve 92 drives the second mounting frame 3 and the movable auxiliary roller 31 to move upwards. The relatively relaxed path of the conveying yarn 5 reduces the downward pressure on the movable main roller 21, decreases the compression of the return spring 85, and lowers the initial tension. This prevents the yarn from breaking due to excessive stretching, reduces accidental machine stops, and allows the tension to disappear more quickly when the yarn breaks. Even with a low initial tension, the return spring 85 can still quickly push the movable main roller 21 upward, ensuring timely detection.

[0031] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A yarn breakage automatic stop device for a yarn-dyed fabric loom, characterized in that, The device includes a spiral frame (1), within which a first mounting frame (2) and a second mounting frame (3) are movably mounted. A movable main roller (21) is rotatably mounted in the first mounting frame (2), and a movable auxiliary roller (31) is rotatably mounted in the second mounting frame (3). A fixed auxiliary roller (4) is rotatably mounted on the inner side wall of the spiral frame (1). A conveying yarn (5) is provided inside the spiral frame (1). The conveying yarn (5) passes sequentially below the fixed auxiliary roller (4), above the movable main roller (21), and below the movable auxiliary roller (31). A first electrical connecting block (6) is embedded in the top of the first mounting frame (2), and a second electrical connecting block (7) is embedded in the top of the spiral frame (1). The spinning stops when the first electrical connecting block (6) contacts the second electrical connecting block (7).

2. The yarn breakage automatic stop device for a yarn-dyed fabric loom according to claim 1, characterized in that: The movable auxiliary roller (31) and the fixed auxiliary roller (4) are symmetrically arranged on both sides of the outside of the first mounting frame (2). The movable auxiliary roller (31) and the fixed auxiliary roller (4) are both arranged below the movable main roller (21). When the conveying yarn (5) breaks, the first electrical connecting block (6) contacts the second electrical connecting block (7).

3. The yarn breakage automatic stop device for a yarn-dyed fabric loom according to claim 1, characterized in that: The first mounting frame (2) is provided with an elastic reset component (8) on its outer side to reset the first mounting frame (2) when the conveying yarn (5) breaks, and the second mounting frame (3) is provided with a drive component (9) on its outer side to drive the second mounting frame (3) to move up and down.

4. The yarn breakage automatic stop device for a yarn-dyed fabric loom according to claim 3, characterized in that: The elastic reset assembly (8) includes a pair of fixing plates (81), which are symmetrically arranged on both sides of the first mounting frame (2). The pair of fixing plates (81) are fixedly installed on the inner side wall of the U-shaped frame (1). Several fixing blocks (82) are symmetrically fixedly installed at both ends of the first mounting frame (2). Fixing columns (83) are fixedly installed at the bottom ends of the fixing blocks (82). The fixing columns (83) slide through the fixing plates (81). Blocking blocks (84) are fixedly installed at the bottom ends of the fixing plates (81). Reset springs (85) are sleeved on the fixing columns (83). The reset springs (85) are elastically connected between the top surface of the fixing plate (81) and the bottom surface of the fixing block (82).

5. The yarn breakage automatic stop device for a yarn-dyed fabric loom according to claim 3, characterized in that: The drive assembly (9) includes a fixed mounting plate (91) which is disposed above the second mounting bracket (3). The fixed mounting plate (91) is fixedly installed on the inner side wall of the U-shaped frame (1). A first fixed sleeve block (92) is fixedly installed on one side of the second mounting bracket (3). A threaded rod (93) is rotatably installed between the fixed mounting plate (91) and the inner bottom surface of the U-shaped frame (1). The first fixed sleeve block (92) is threaded onto the threaded rod (93).

6. The yarn breakage automatic stop device for a yarn-dyed fabric loom according to claim 5, characterized in that: A forward and reverse motor (94) is fixedly installed on the top of the fixed mounting plate (91). The output shaft of the forward and reverse motor (94) is coaxially fixedly connected to the threaded rod (93). A second fixed sleeve block (95) is fixedly installed on the other side of the second mounting bracket (3). A limit rod (96) is fixedly installed between the fixed mounting plate (91) and the inner bottom surface of the U-shaped frame (1). The second fixed sleeve block (95) is slidably sleeved on the limit rod (96).

Images