A yarn tensioning mechanism and a cigarette making machine yarn belt special weaving machine using the same

Abstract

The utility model provides a kind of yarn tensioning mechanism and use the mechanism's cigarette machine suction silk belt special loom, comprising: the shaft that can be hung on multiple yarns and is connected with yarn rolling connection, the support that is rotatably connected in the shaft axis on the both sides of shaft, the connecting frame that is fixedly connected both sides support and the weight adjusting assembly that can be hung on connecting frame and adjust different weight are provided.The utility model utilizes gravity to provide tension, simple structure, constant and reliable tension source, avoids the problem that tension is unstable due to fatigue of spring and other elastic elements;By applying force to symmetry center, it is ensured that the tension applied to multiple yarns is uniform and balanced, significantly improving the quality and consistency of woven tape products;At the same time, tension adjustment is realized by increasing or decreasing standardized counterweight, and the operation is intuitive, accurate and highly repeatable.

Description

Technical Field

[0001] This utility model relates to the technical field of ribbon suction processing equipment, and in particular to a yarn tensioning mechanism and a special ribbon weaving machine for cigarette machines that uses this mechanism. Background Technology

[0002] In the weaving process of a ribbon loom, applying a constant and uniform tension to the warp yarns is one of the core technological steps to ensure the quality of the final ribbon product. The stability and uniformity of the warp tension directly affect the physical properties and appearance quality of the fabric. If the warp tension is not properly controlled, such as being too high or too low, or if the tension between the yarns is uneven, it will lead to a series of serious quality problems. Uneven tension will cause differences in the elongation of each warp yarn, which will manifest as uneven dyeing and differences in gloss in subsequent dyeing processes. At the same time, uneven tension will also damage the flatness of the fabric, affecting the smoothness and aesthetics of the ribbon surface.

[0003] Especially in the production of industrial fabrics with extremely high requirements for dimensional stability, such as cigarette machine suction ribbons, their functionality relies on a uniform mesh structure to reliably absorb tobacco. If the input tension is not properly controlled, the ribbon may shrink unpredictably after high-temperature setting processes such as ironing, resulting in dimensional deviations and, in severe cases, rendering the product unusable. Existing yarn tensioning devices generally suffer from problems such as complex structure, poor tension stability, low reliability, inconvenient adjustment, or high cost. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a yarn tensioning mechanism and a special weaving machine for cigarette machine suction ribbons using the mechanism, so as to solve the problems of complex structure, poor tension stability and difficulty in adjustment of the tensioning device in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a yarn tensioning mechanism, including a roller that can be hung on multiple yarns and is tumbledly connected to the yarns, supports that are rotatably connected to both sides of the roller around the axis of the roller, a connecting frame that is fixedly connected to the supports on both sides, and a weight adjustment component that can be adjusted to different weights and is hung on the connecting frame. The connecting frame has a hanging groove at its center that corresponds to the left and right symmetrical planes of the roller, so that the weight adjustment component is located at the left and right symmetrical planes of the roller.

[0006] By adopting the above technical solution, gravity is used to provide tension, resulting in a simple structure and a constant and reliable tension source, avoiding the problem of unstable tension caused by fatigue of elastic elements such as springs. By applying the force to the center of symmetry, the tension applied to multiple yarns is ensured to be uniform and balanced, significantly improving the quality and consistency of the webbing products. At the same time, tension adjustment is achieved by adding or removing standardized counterweights, making the operation intuitive, precise, and highly repeatable.

[0007] In one embodiment of the present invention, the connecting frame is configured as a U-shaped structure and is disposed on the lower side of the support, and the hanging groove is disposed in the middle of the connecting frame and extends downward.

[0008] By adopting the above technical solution, it is easier to hang the weight adjustment component on the connecting frame. The shape structure allows the device to be compactly installed under the support, saving vertical installation space. The central hanging slot provides a single, precise suspension point, avoiding eccentric forces that may disrupt the tension balance.

[0009] In one embodiment of the present invention, the weight adjustment component includes a hook hung on a hanging groove, a connecting column arranged vertically and fixedly connected to the hook, a support plate fixedly arranged at the bottom of the connecting column, and a plurality of counterweights that can be fitted onto the connecting column.

[0010] By adopting the above technical solution, the modular design enables "digital" or quantitative adjustment of tension. Operators can precisely and repeatably set the tension by adding or removing standardized counterweights, eliminating the guesswork and uncertainty inherent in traditional screw adjustment methods. This greatly improves process control and production consistency, meeting the precision requirements of modern manufacturing.

[0011] In one embodiment of the present invention, a yarn-separating positioning plate for yarn to pass through is also fixedly provided on the support. The yarn-separating positioning plate has multiple threading holes for yarn to pass through, and the threading holes are evenly arranged on the yarn-separating positioning plate in the horizontal direction.

[0012] By adopting the above technical solutions, it is possible to prevent the yarns from tangling, twisting, or rubbing against each other, ensuring that each yarn travels along an independent and identical path, further guaranteeing the uniform distribution of tension, while avoiding yarn damage, thereby improving the quality of the final webbing product.

[0013] In one embodiment of this utility model, the two sides of the hook are in contact with the inner walls of the two sides of the hanging groove, thereby restricting the lateral swing of the weight adjustment component.

[0014] By employing the above technical solution, this feature plays a role in resisting lateral swaying in the high-vibration environment generated by the high-speed operation of the ribbon weaving machine. It effectively suppresses the oscillation or rotation of the weight adjustment component, which causes dynamic tension fluctuations. Therefore, this design ensures that the tension remains constant even when the machine is running at high speed.

[0015] A special ribbon weaving machine for cigarette machine suction ribbons includes a frame, a yarn feeding mechanism disposed at the end of the frame, a yarn tensioning mechanism as described above, and a yarn conveying assembly disposed on the frame.

[0016] By adopting the above technical solution, and by providing stable and balanced tension, the functional quality and production qualification rate of the cigarette drawer are directly improved, thereby improving its performance in the cigarette manufacturing process.

[0017] As described above, the yarn tensioning mechanism of this utility model and the special weaving machine for cigarette machine suction ribbons using this mechanism have the following beneficial effects: tension is applied by gravity, and the point of force application is located at the center of symmetry, which fundamentally ensures the constancy of the tension source and the balance of the applied force, thus providing inherently stable tension, which is superior to spring systems that will produce fatigue. The centralized application of force can prevent the roller from tilting, ensuring uniform tension of all yarns, and is more suitable for cigarette machine suction ribbons that require uniform mesh structure. Attached Figure Description

[0018] Figure 1 The diagram shown is a schematic representation of the overall structure disclosed in Embodiment 1 of this utility model.

[0019] Figure 2 The diagram shown is a partial structural schematic diagram of Embodiment 2 of this utility model.

[0020] Component designation explanation

[0021] 1. Roller; 2. Support; 3. Connecting frame; 4. Weight adjustment component; 5. Hanging groove; 6. Thread positioning plate; 7. Thread hole; 8. Yarn;

[0022] 20. Hook; 21. Connecting post; 22. Support plate; 23. Counterweight;

[0023] 30. Frame; 31. Yarn feeding mechanism; 32. Yarn conveying assembly; 33. Yarn tensioning mechanism. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] Please see Figures 1 to 2It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0026] Example 1:

[0027] like Figure 1 As shown, this embodiment provides a yarn tensioning mechanism, including a roller 1, a support 2, a connecting frame 3, a weight adjustment component 4, and a yarn positioning plate 6.

[0028] The roller 1 is a smooth cylinder, and its two ends are rotatably mounted on a pair of supports 2 via bearings (not shown in the figure).

[0029] The surface of the roller 1 is used to support multiple yarns 8 arranged side by side and to form a rolling contact with the yarns 8, thereby providing tension while minimizing frictional damage to the yarns.

[0030] Supports 2 are installed at both ends of roller 1 and serve as the main support for the entire tensioning mechanism. They can be fixed to the frame 30 of the weaving machine.

[0031] The support 2 and the roller 1 are rotatably connected, so that the entire assembly consisting of roller 1, support 2, connecting frame 3 and weight adjustment component 4 can swing freely around the axis of roller 1.

[0032] The connecting bracket 3 is used to connect and fix the two supports 2, making them a whole.

[0033] In this embodiment, the connecting frame 3 is designed as a U-shaped structure, with its two ends fixedly connected to the lower part of the two supports 2 respectively. The middle part of the crossbeam of the connecting frame 3 is provided with a hanging groove 5 extending downward in the vertical direction.

[0034] The centerline of the hanging groove 5 coincides with the left and right symmetrical planes of the roller 1.

[0035] The weight adjustment assembly 4 is the source of tension and includes a hook 20, a connecting post 21, a support plate 22, and multiple counterweights 23.

[0036] The hook 20 is shaped to match the hanging groove 5, allowing it to be easily hung inside the groove 5. The connecting post 21 is fixed vertically downward at the bottom of the hook 20. The support plate 22 is fixed to the bottom of the connecting post 21 to support the counterweight 23.

[0037] The counterweight 23 is a standardized block with a central through hole, which can be easily inserted into or removed from the top of the connecting post 21 to ensure the accuracy and repeatability of tension adjustment.

[0038] The yarn positioning plate 6 is fixed on the support 2 and is located before the yarn 8 enters the roller 1.

[0039] The yarn positioning plate 6 has multiple threading holes 7 evenly spaced along the horizontal direction. Each yarn 8 passes through a corresponding threading hole 7 before reaching the roller 1.

[0040] This allows multiple yarns 8 to remain parallel and evenly spaced when entering the tensioning area, effectively preventing yarn crossing, tangling, and friction, which is a prerequisite for ensuring that tension is applied evenly to each yarn.

[0041] The two sides of the hook 20 are in close contact or abut against the inner wall of the hanging groove 5, which can effectively limit the lateral swing or rotation of the weight adjustment component 4 when the weaving machine vibrates, thereby avoiding tension fluctuations and ensuring constant tension.

[0042] Example 2:

[0043] like Figure 2 As shown, this embodiment provides a special ribbon weaving machine for cigarette machine suction ribbons, including a frame 30, a yarn supply mechanism 31 and a yarn conveying assembly 32 mounted on the frame 30, and also includes a yarn tensioning mechanism 33 as described in Embodiment 1.

[0044] After multiple yarns 8 are drawn out from the yarn supply mechanism 31, they first pass through the threading holes 7 on the yarn positioning plate 6 in sequence, then pass around the bottom of the roller 1 together, and finally are conveyed to the yarn conveying assembly 32.

[0045] When the weight adjustment component 4 is hung on the hanging slot 5 of the connecting frame 3 via the hook 20, its total weight generates a vertically downward gravity. Since the entire tensioning mechanism assembly can swing freely around the axis of the roller 1, this gravity will pass through the connecting frame 3 and the support 2, causing the roller 1 to generate an upward lifting force on the yarn 8 below.

[0046] This lifting force causes the yarn path to bend, thereby generating a tension $T$ in the yarn 8, the magnitude of which is proportional to the magnitude of gravity.

[0047] Since the suspension point of the weight adjustment component 4 is located at the center of symmetry of the roller 1, gravity is evenly distributed over the entire length of the roller 1, ensuring that the tension applied to each yarn 8 is equal.

[0048] When it is necessary to adjust the tension, the operator can simply add or remove the number of counterweights 23 on the connecting column 21 to quickly and accurately set the required tension value.

[0049] The yarn tensioning mechanism of this invention is particularly suitable for the production of special fabrics that require extremely high uniformity of yarn tension, such as cigarette machine suction ribbons.

[0050] The cigarette machine suction ribbon is a porous mesh fabric whose core function is to uniformly adsorb tobacco shreds using negative pressure and transport them into a tobacco bundle. The uniformity of its mesh directly determines the uniformity of the adsorption force and the quality of the tobacco bundle. Using the tensioning mechanism of this invention, it is possible to ensure that all warp yarns constituting the suction ribbon have a highly consistent tension during the weaving process, thereby producing a high-quality suction ribbon with a uniform structure and stable porosity, effectively improving the quality and efficiency of cigarette production.

[0051] In summary, the yarn tensioning mechanism provided by this utility model cleverly utilizes gravity and ensures its symmetrical effect, achieving highly stable, uniform, and precisely adjustable yarn tensioning function with an extremely simple structure.

[0052] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A yarn tensioning mechanism, characterized in that, It includes a roller that can be hung on multiple yarns and is tumbled and connected to the yarns, supports that are rotatably connected to both sides of the roller around the axis of the roller, a connecting frame that is fixedly connected to the supports on both sides, and a weight adjustment component that can be adjusted to different weights and is hung on the connecting frame. The connecting frame has a hanging groove at the center that corresponds to the left and right symmetrical planes of the roller, so that the weight adjustment component is located at the left and right symmetrical planes of the roller.

2. The yarn tensioning mechanism according to claim 1, characterized in that: The connecting frame is configured as a U-shaped structure and is located on the lower side of the support. The hanging groove is located in the middle of the connecting frame and extends downward.

3. The yarn tensioning mechanism according to claim 1, characterized in that: The weight adjustment assembly includes a hook hung on the hanging slot, a connecting column arranged vertically and fixedly connected to the hook, a support plate fixedly set at the bottom of the connecting column, and multiple detachable counterweights that can be fitted onto the connecting column.

4. The yarn tensioning mechanism according to claim 1, characterized in that: The support is also fixedly provided with a yarn-separating positioning plate for yarn to pass through. The yarn-separating positioning plate has multiple threading holes for yarn to pass through, which are evenly arranged on the yarn-separating positioning plate in the horizontal direction.

5. The yarn tensioning mechanism according to claim 3, characterized in that: The hooks are connected to the inner walls of the hanging grooves on both sides, restricting the lateral swing of the weight adjustment component.

6. A special ribbon weaving machine for cigarette making machines, characterized in that: The weaving machine includes a frame, a yarn feeding mechanism disposed at the end of the frame, and a yarn conveying assembly disposed on the frame. The weaving machine also includes a yarn tensioning mechanism as described in any one of claims 1-5.

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