A device for detecting weft yarn tension on a rapier loom
By designing a weft tension detection device with a light-transmitting color plate and lighting components on a rapier loom, the problem of the lack of intuitive weft tension detection in the existing technology is solved, and rapid and intuitive monitoring of the weft tension status is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG REINBACH ROLLER CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-26
AI Technical Summary
Existing weft tension detection devices for rapier looms require observing a pointer to determine whether the yarn tension is within a reasonable range, which is not intuitive to operate.
Design a weft tension detection device that includes a light-transmitting color plate and an illumination component. The light-transmitting color plate is tilted by the change in weft tension, and the magnitude of the weft tension can be intuitively judged by the color change. The light-transmitting color plate is made up of blocks of different colors, which simplifies the judgment process.
It enables rapid and intuitive monitoring of weft tension, allowing operators to determine whether the tension is abnormal simply by observing color changes, without the need for precise readings, thus improving the efficiency of real-time monitoring during the production process.
Smart Images
Figure CN224286198U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loom technology, specifically to a weft yarn tension detection device for rapier looms. Background Technology
[0002] Rapier looms are an important type of weaving equipment in the textile industry. Their working principle is unique, particularly in the weft insertion stage, where they rely on a rapier (also called a weft insertion rapier) to precisely guide the weft yarn through the warp layer, completing the weaving process. Because rapier looms use a rapier for weft insertion, the entire weft insertion length depends on the rapier's tension. The tension affects the loom's weft stop and weft shrinkage; excessive tension can lead to weft yarn breakage, increasing the breakage rate; while insufficient tension can cause weft shrinkage, affecting the fabric's appearance and performance. To address this technical problem, the tension detection device for rapier looms disclosed in authorization announcement number CN222013378U includes a support back plate and a support panel arranged relatively parallel and vertically. The support back plate has a first through hole at its lower part, and the support panel has a second through hole corresponding to the first through hole. A fixed shaft and a rotating shaft are arranged laterally between the support back plate and the support panel. The two ends of the fixed shaft are fixedly connected to the support back plate and the support panel, respectively. The rotating shaft is located below the fixed shaft, and its two ends are rotatably connected to the support back plate and the support panel, respectively. A tension bar is fixedly connected to the outer wall of the rotating shaft. A driving gear and a torque spring are fixedly sleeved on the rotating shaft. One end of the torque spring is fixedly connected to the support panel, and the other end is fixedly connected to the tension bar. A driven gear that meshes with the driving gear is rotatably sleeved on the fixed shaft. A pointer is fixed on the driven gear, enabling the detection of the weft tension of the rapier loom.
[0003] However, the above technical solution requires observing the pointer to determine whether the yarn tension is within a reasonable range, which is quite laborious and not intuitive. Utility Model Content
[0004] To address the aforementioned technical deficiencies, this invention provides a weft tension detection device for rapier looms, which allows for a more intuitive observation of whether the yarn tension is within a reasonable range.
[0005] This utility model discloses a weft tension detection device for a rapier loom, including a base, on which a parallel and vertical support back plate and a support panel are provided. The support back plate has a first through hole at its lower part, and the support panel has a second through hole at the position corresponding to the first through hole. A rotating shaft is provided horizontally between the support back plate and the support panel. The two ends of the rotating shaft are rotatably connected to the support back plate and the support panel, respectively. A tension rod is fixedly connected to the lower side of the rotating shaft. A torsion spring is sleeved on the rotating shaft. One end of the torsion spring is fixedly connected to the support panel, and the other end of the torsion spring is fixedly connected to the rotating shaft. A connecting rod is provided on the upper side of the end of the rotating shaft near the support back plate. A light-transmitting plate is provided on the upper end of the connecting rod. A light-transmitting hole is provided on the support back plate at the position corresponding to the light-transmitting plate. An illumination component is provided on the back of the support back plate to illuminate into the light-transmitting hole.
[0006] The principle of the above technical solution is as follows: the device is installed between the weft detector and the weft feeder of a rapier loom. The weft yarn passes through the first through hole on the support back plate and the second through hole on the support panel and comes into contact with the tension bar. The tension bar overcomes the torque of a torsion spring and maintains a certain angle with the vertical direction, causing the weft yarn between the first and second through holes to bend at the tension bar. At this time, the light-transmitting hole is directly opposite the center of the light-transmitting color plate. When the weft yarn tension increases, the weft yarn between the first and second through holes tends to straighten, and the weft yarn exerts force on the tension bar, causing the tension bar to overcome the torque of the torsion spring. When the tension bar approaches a vertical position, the angle between the tension bar and the vertical direction decreases, causing the rotating shaft to rotate and thus tilting the light-transmitting color plate in one direction. When the weft tension decreases, the curvature of the weft yarn passing through hole one and hole two increases, the force of the weft yarn on the tension bar decreases, and the torsion of the torsion spring causes the angle between the tension bar and the vertical direction to increase, causing the rotating shaft to rotate and thus tilting the light-transmitting color plate in another direction. The lighting component illuminates the light-transmitting hole from the back, and the operator can judge the magnitude of the weft tension by observing the change in the position of the light source on the light-transmitting color plate.
[0007] To better observe the weft tension, the light-transmitting color plates include three types: No. 1, No. 2, and No. 3. Each of these three color plates is different and is connected sequentially. A connecting rod is fixedly connected to the middle No. 2 color plate. The advantage of this setup is that when the tension is normal, the No. 2 color plate aligns with the light-transmitting hole. When the tension is too high or too low, the rotating shaft will rotate accordingly, aligning the light-transmitting hole with the corresponding No. 1 or No. 2 color plate. Operators do not need precise readings; they can quickly determine if the tension is abnormal simply by observing the color, resulting in a faster response.
[0008] To make it easier to observe the position of the light-transmitting color plate, the height of the support panel is lower than that of the support back panel. With the support panel height reduced, the view of the light-transmitting color plate is not obstructed, making it easier to observe.
[0009] The present invention provides a weft tension detection device for rapier looms, which has the following advantages: it directly reflects the weft tension state through the positional change of the light-transmitting color plate, allowing operators to quickly determine whether the tension is normal and achieve real-time monitoring during the production process. Attached Figure Description
[0010] Figure 1 This is a left view of Embodiment 1 of the present invention;
[0011] Figure 2 This is a rear view of Embodiment 1 of the present utility model;
[0012] Figure 3 This is a rear view of Embodiment 1 of the present invention after the lighting components have been removed;
[0013] Figure 4 This is a schematic diagram illustrating the use of Embodiment 1 of this utility model. Detailed Implementation
[0014] 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.
[0015] Example 1:
[0016] like Figure 1 , 2 As shown in Figures 3 and 4, this utility model discloses a weft tension detection device for a rapier loom, including a base 1. A parallel and vertical support back plate 9 and a support panel 3 are mounted on the base 1. The height of the support panel 3 is lower than the height of the support back plate 9. A first through hole 10 is provided at the lower part of the support back plate 9, and a second through hole 14 is provided on the support panel 3 corresponding to the first through hole 10. A rotating shaft 5 is horizontally arranged between the support back plate 9 and the support panel 3. Both ends of the rotating shaft 5 are rotatably connected to the support back plate 9 and the support panel 3, respectively. A tension rod 2 is fixedly connected to the lower side of the rotating shaft 5. A torsion spring 4 is sleeved on the rotating shaft 5. One end of the torsion spring 4 is fixedly connected to the support panel 3, and the other end of the torsion spring 4... The end is fixedly connected to the rotating shaft 5. A connecting rod 6 is provided on the upper side of the rotating shaft 5 near the supporting back plate 9. A light-transmitting color plate is provided on the upper end of the connecting rod 6. The light-transmitting color plate includes a first light-transmitting color plate 7, a second light-transmitting color plate 12, and a third light-transmitting color plate 13. The first light-transmitting color plate 7, the second light-transmitting color plate 12, and the third light-transmitting color plate 13 are all different colors. The first light-transmitting color plate 7, the second light-transmitting color plate 12, and the third light-transmitting color plate 13 are connected together in sequence. The connecting rod 6 is fixedly connected to the second light-transmitting color plate 12 in the middle. A light-transmitting hole 11 is provided on the supporting back plate 9 at the position corresponding to the light-transmitting color plate. An illumination component 8 is provided on the back of the supporting back plate 9 to illuminate into the light-transmitting hole 11.
[0017] The principle of the above technical solution is as follows: the device is installed between the weft detector and the weft feeder of the rapier loom. The weft yarn 15 passes through the first through hole 10 on the support back plate 9 and the second through hole 14 on the support panel 3 and contacts the tension bar 2. The tension bar 2 overcomes the torsion of the torsion spring 4 and maintains a certain angle with the vertical direction, so that the weft yarn 15 between the first through hole 10 and the second through hole 14 bends at the tension bar. At this time, the light-transmitting hole 11 is directly facing the second light-transmitting color plate 12. When the tension of the weft yarn 15 changes, it will push the tension bar 2 to drive the rotating shaft 5 to rotate, thereby changing the position of the light-transmitting color plate on the connecting rod 6. The lighting component 8 illuminates the light-transmitting hole 11 from the back. The operator can judge the tension of the weft yarn 15 by observing the position change of the light-transmitting color plate in the light-transmitting hole 11. That is, when the tension increases, the light-transmitting color plate moves to one side and when it decreases, it moves to the other side. It can be directly observed whether the tension of the weft yarn 15 is within a reasonable range.
Claims
1. A weft thread tension detection device for a rapier loom, characterized in that, The system includes a base (1), on which are provided parallel and vertical support back plate (9) and support panel (3). The support back plate (9) has a through hole 1 (10) at its lower part, and the support panel (3) has a through hole 2 (14) at the position corresponding to the through hole 1 (10). A rotating shaft (5) is provided horizontally between the support back plate (9) and the support panel (3). The two ends of the rotating shaft (5) are rotatably connected to the support back plate (9) and the support panel (3) respectively. A tensioning device is fixedly connected to the lower side of the rotating shaft (5). A rod (2) is fitted with a torsion spring (4) on a rotating shaft (5). One end of the torsion spring (4) is fixedly connected to the support panel (3), and the other end of the torsion spring (4) is fixedly connected to the rotating shaft (5). A connecting rod (6) is provided on the upper side of the end of the rotating shaft (5) near the support back plate (9). A light-transmitting color plate is provided on the upper end of the connecting rod (6). A light-transmitting hole (11) is provided on the support back plate (9) at the position corresponding to the light-transmitting color plate. An illumination component (8) is provided on the back of the support back plate (9) to illuminate into the light-transmitting hole (11).
2. A weft thread tension detection device for a rapier loom according to claim 1, characterized in that The light-transmitting color plate includes a first light-transmitting color plate (7), a second light-transmitting color plate (12), and a third light-transmitting color plate (13). The first light-transmitting color plate (7), the second light-transmitting color plate (12), and the third light-transmitting color plate (13) are all different colors. The first light-transmitting color plate (7), the second light-transmitting color plate (12), and the third light-transmitting color plate (13) are connected together in sequence. The connecting rod (6) is fixedly connected to the second light-transmitting color plate (12) in the middle.
3. A weft thread tension detection device for a rapier loom according to claim 1 or 2, characterized in that The height of the support panel (3) is lower than the height of the support back panel (9).