Weft tension control device for rapier looms

Abstract

This application relates to the technical field of textile machinery, and in particular to a weft tension control device for rapier looms. The device includes a base, a moving rod, a stationary rod, a shear shaft, a drive assembly, a cam, and a reset member. The moving rod is rotatably connected to the base via the shear shaft, and the stationary rod is fixedly connected to the base. The moving rod and stationary rod are arranged opposite to each other. The drive assembly is mounted on the base, and its output end is fixedly connected to the shaft of the cam. The outer circumferential surface of the cam abuts against the resistance arm of the moving rod. One end of the reset member is assembled with the moving rod, and the other end is assembled with the stationary rod. The weft yarn passes between the moving rod and the stationary rod. This application provides a weft tension control device for rapier looms, which simplifies the structural complexity of the control device and effectively reduces weft shrinkage.

Description

Technical Field

[0001] This application relates to the technical field of textile machinery, and in particular to a weft tension control device for rapier looms. Background Technology

[0002] During the loom operation, the treatment of weft yarns is one of the key steps to ensure fabric quality. Good weft yarn treatment can reduce fabric defects, improve the smoothness and uniformity of the fabric, and thus improve the overall quality of the product.

[0003] In traditional looms, to reduce weft shrinkage, existing technology provides a method of setting multiple yarn guides on the weft yarn transport channel of the loom to precisely guide the direction of the weft yarn and reduce the possible entanglement and twisting of the weft yarn during transport.

[0004] However, conventional methods for preventing weft shrinkage on traditional looms often rely on complex electronic equipment and delicate mechanical structures, making it difficult to achieve universal and precise control for different types of fabrics and weaving processes. In actual production, these devices struggle to make quick and accurate adjustments when changes occur in the material, thickness, or weaving speed of the weft yarn. Despite these limitations, weft shrinkage problems still occur frequently. Furthermore, the complexity of these devices increases the manufacturing cost and maintenance difficulty of the loom, reducing production efficiency. Summary of the Invention

[0005] In order to overcome the technical problems described in the prior art, this application provides a weft tension control device for rapier looms, which can simplify the structural complexity of the control device and effectively reduce the occurrence of weft shrinkage.

[0006] The weft tension control device for rapier looms provided in this application adopts the following technical solution:

[0007] A weft tension control device for a rapier loom includes a base, a moving rod, a stationary rod, a shear shaft, a drive assembly, a cam, and a reset component. The moving rod is rotatably connected to the base via the shear shaft. The stationary rod is fixedly connected to the base, and the moving rod and stationary rod are arranged opposite each other. The drive assembly is mounted on the base, and its output end is fixedly connected to the shaft of the cam. The outer circumferential surface of the cam abuts against the resistance arm of the moving rod. One end of the reset component is fitted with the moving rod, and the other end is fitted with the stationary rod. The weft yarn passes between the moving rod and the stationary rod.

[0008] By adopting the above technical solution, the drive component acts as a power source to drive the cam to rotate, thereby causing the moving rod to swing. When the moving rod swings away from the stationary rod, the scissor head can pass through both. Subsequently, the moving rod is reset by the change of the cam curve and the pull of the reset component, realizing the rapid closing of the moving rod and the stationary rod, and clamping the weft yarn.

[0009] Compared with existing technologies, this application achieves precise control of weft tension through the precise cooperation of the base, moving rod, and stationary rod, especially the abutting action of the cam against the resistance arm of the moving rod. This enables the weft yarn to maintain stable tension during weaving, improving fabric quality and production efficiency. The reset component ensures the stability and reliability of the moving rod and stationary rod during relative movement. Even under high-speed operation or sudden situations, the reset component can quickly reset the moving rod to its initial state, effectively simplifying the structural complexity of the control device, reducing equipment failures and weft yarn breakage, and achieving the goal of effectively reducing weft shrinkage.

[0010] Preferably, the moving rod has a first hollow channel inside, the opening direction of the first hollow channel is consistent with the length direction of the moving rod, and a steel reed is slidably connected to the middle of the first hollow channel.

[0011] By adopting the above technical solution, the first hollow channel inside the moving rod provides sliding space for the reed, allowing the reed to push the weft yarn together to the weaving point, further reducing the occurrence of weft shrinkage.

[0012] Preferably, the interior of the stationary rod is provided with a second hollow channel, the opening direction of the second hollow channel is consistent with the length direction of the stationary rod, and the reed slides simultaneously in the first hollow channel and the second hollow channel.

[0013] By adopting the above technical solution, the second hollow channel inside the stationary rod works in conjunction with the first hollow channel of the moving rod to provide a stable sliding environment for the reed. The dual-channel design enhances the stability and reliability of the reed's sliding, further improving weaving efficiency and quality.

[0014] Preferably, the power arm of the moving rod is provided with an upper pressure block, and the outer peripheral surface of the cam abuts against the upper surface of the upper pressure block.

[0015] By adopting the above technical solution, an upper pressure block is set on the power arm of the moving rod and abuts against the outer peripheral surface of the cam, which effectively increases the contact area between the cam and the moving rod. This ensures that the cam can smoothly and accurately drive the moving rod when it rotates. As an intermediary between the cam and the moving rod, the upper pressure block can bear some friction and impact, effectively reducing the wear caused by direct contact between the cam and the moving rod. This improves the efficiency of force transmission, extends the service life of the device, reduces the probability of failure, and makes the device respond more quickly and accurately during dynamic operation, greatly improving the precise control of weft tension.

[0016] Preferably, the reset component is a spring, with one end of the spring assembled with the upper pressure block and the other end assembled with the stationary rod.

[0017] By adopting the above technical solution and using a spring as a reset component, the excellent elastic properties of the spring are utilized to ensure that the moving rod can quickly and accurately return to its initial position after being pushed by the cam, thus ensuring the stability and reliability of the device during continuous operation. The cost of the spring is relatively low, which meets production requirements.

[0018] Preferably, a first adjustment component is provided between the stationary rod and the base, the first adjustment component being used to fix the stationary rod and adjust its position and height.

[0019] By adopting the above technical solution, the position of the stationary rod is kept within a reasonable range under the action of the first adjustment component, thereby keeping the height and tension of the weft yarn passage within the control range, improving the flexibility and adjustability of the device, optimizing the tension control effect, and improving the weaving quality.

[0020] Preferably, the moving rod includes a main pressure rod and a secondary pressure rod, the upper pressure block is fixed on the secondary pressure rod, the secondary pressure rod is rotatably connected to the base through the scissor shaft, the main pressure rod is located at the end of the secondary pressure rod away from the upper pressure block, and a second adjustment component is provided between the main pressure rod and the secondary pressure rod. The second adjustment component is used to fix the moving rod and adjust its position and height.

[0021] By adopting the above technical solution, under the action of the second adjustment component, the position of the moving rod is kept within a reasonable range, making the moving rod more flexible, thereby keeping the height and tension of the weft yarn passage within the control range. At the same time, it also allows the upper pressure block to better cooperate with the cam.

[0022] Preferably, the drive assembly includes a gear set and a power component, the power component is mounted on the base and is assembled with the input end of the gear set, and the power output end of the gear set is fixedly connected to the shaft of the cam.

[0023] By adopting the above technical solution, the cooperation between the power component and the gear set provides a stable and continuous power output for the device, which simplifies the structure of the device and ensures that the cam rotates evenly and continuously, thereby achieving stable control of the weft tension.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. This application uses a drive assembly as a power source to drive the cam to rotate, thereby causing the moving rod to swing. When the moving rod swings away from the stationary rod, the scissor head can pass through both. Subsequently, the moving rod is reset by the change of the cam curve and the pull of the reset component, realizing the rapid closing of the moving rod and stationary rod, clamping the weft yarn, and realizing precise control of the weft yarn tension.

[0026] 2. This application provides sliding space for the reed by setting a first hollow channel inside the moving rod, so that the reed can push the weft yarn together to the weaving point, further reducing the occurrence of weft shrinkage. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the control device in the embodiments of this application.

[0028] Figure 2 yes Figure 1 Another visual illustration.

[0029] Figure 3 This is a schematic diagram illustrating the cooperation between the reed, the moving rod, and the stationary rod in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Base; 2. Moving rod; 21. Main pressure rod; 22. Secondary pressure rod; 23. Upper pressure block; 24. First hollow channel; 3. Stationary rod; 4. Scissor shaft; 51. Gear set; 6. Cam; 7. Reset component; 8. First adjustment assembly; 9. Second adjustment assembly; 10. Reed. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses a weft tension control device for rapier looms.

[0033] Reference Figure 1 and Figure 2A weft tension control device for rapier looms includes a base 1, a moving rod 2, a stationary rod 3, a shear shaft 4, a drive assembly, a cam 6, and a reset component 7. The moving rod 2 is rotatably connected to the base 1 via the shear shaft 4, and the stationary rod 3 is fixedly connected to the base 1. The moving rod 2 and the stationary rod 3 are arranged opposite each other. Under the cooperation of the drive assembly, the cam 6, and the reset component 7, the moving rod 2 can rotate relative to the stationary rod 3 around the shear shaft 4, which facilitates tension control of the weft yarn passing between the two, enabling the clamping or loosening of the weft yarn, thereby controlling the weft yarn tension. This simple mechanical structure avoids the use of complex electronic equipment, reduces manufacturing costs and maintenance difficulty, and can better adapt to different types of fabrics and weaving processes.

[0034] In this application, the base 1 is the supporting component of the entire device, capable of bearing the weight and force of components such as the moving rod 2, the stationary rod 3, and the drive assembly. The moving rod 2 includes a main pressure rod 21 and a secondary pressure rod 22. The secondary pressure rod 22 is rotatably connected to the base 1 via a scissor shaft 4. An upper pressure block 23 is fixed on the secondary pressure rod 22. The upper pressure block 23 can be a square or round block structure, made of plastic or rubber, serving to buffer and increase friction. The main pressure rod 21 is located at the end of the secondary pressure rod 22 away from the upper pressure block 23. A second adjustment component 9 is provided between the main pressure rod 21 and the secondary pressure rod 22. The second adjustment component 9 is used to fix the moving rod 2 and adjust its position and height.

[0035] Specifically, the second adjustment component 9 can be a screw and nut mechanism. By rotating the screw, the position height of the auxiliary pressure rod 22 relative to the main pressure rod 21 can be adjusted, thereby adjusting the overall position height of the moving rod 2 to adapt to different weaving needs. More specifically, taking the position of the scissor shaft 4 as the base point, the end of the auxiliary pressure rod 22 with the upper pressure block 23 is defined as the resistance arm, and the end of the auxiliary pressure rod 22 with the main pressure rod 21 is defined as the power arm.

[0036] Reference Figure 2 and Figure 3 A first adjustment component 8 is provided between the stationary rod 3 and the base 1. The first adjustment component 8 can also be a screw and nut mechanism. By rotating the screw, the position and height of the stationary rod 3 can be adjusted. The stationary rod 3 is fixedly connected to the base 1 through the first adjustment component 8, so that the relative position between the stationary rod 3 and the moving rod 2 can be flexibly adjusted according to factors such as the material and thickness of the weft yarn.

[0037] In this application, a first hollow channel 24 is provided inside the moving rod 2. The opening direction of the first hollow channel 24 is consistent with the length direction of the moving rod 2. Similarly, a second hollow channel is provided inside the stationary rod 3. Its opening direction is consistent with the length direction of the stationary rod 3. The inner wall of the channel is smooth. A steel reed 10 is slidably connected to the middle of the first hollow channel 24 and / or the first hollow channel 24. The steel reed 10 is a thin sheet-like part, which can be made of metal or plastic. Its shape is adapted to the hollow channel and can slide freely in the channel.

[0038] Specifically, when a shorter reed 10 is selected, it slides into the first hollow channel 24; when a longer reed 10 is selected, it slides into both the first and second hollow channels simultaneously. The reed 10 can slide synchronously within the two channels, thus pushing the weft yarn towards the weft insertion point, further reducing weft shrinkage and improving tension control of the weft yarn.

[0039] To better achieve the opening and closing action of the moving rod 2 and the stationary rod 3, refer to Figure 1 The drive assembly is mounted on the base 1 and includes a gear set 51 and a power component, which can be a motor. The output shaft of the motor is assembled with the input end of the gear set 51. The gear set 51 can be composed of multiple gear sets 51 of different specifications. Through the meshing transmission between the gears, the power of the motor is transmitted to the shaft of the cam 6. The function of the gear set 51 is to change the speed and torque of the motor to meet the rotation requirements of the cam 6. The cam 6 is usually a disc-shaped part with an irregular shape. The shape of its outer circumference is specially designed so that when the cam 6 rotates, it can drive the moving rod 2 to rotate according to a predetermined pattern.

[0040] The outer circumferential surface of cam 6 abuts against the resistance arm of moving rod 2. When cam 6 rotates, it pushes moving rod 2 to rotate around scissor shaft 4. One end of reset component 7 is assembled with moving rod 2, and the other end is assembled with stationary rod 3, used to reset moving rod 2 after cam 6 rotates. In this application, reset component 7 is a spring, one end of which is assembled with upper pressure block 23, and the other end is assembled with stationary rod 3. The spring is elastic; when cam 6 pushes moving rod 2 to rotate, the spring is stretched or compressed, storing elastic potential energy. When cam 6 rotates to a certain position and no longer pushes moving rod 2, the spring releases elastic potential energy, causing moving rod 2 to reset.

[0041] The implementation principle of this embodiment is as follows: the drive assembly drives the cam 6 to rotate, the cam 6 pushes the moving rod 2 to rotate, changing the distance between the moving rod 2 and the stationary rod 3, thereby adjusting the pressure on the weft yarn and achieving tension control. The reset component 7 enables the moving rod 2 to reset, ensuring the normal cyclic operation of the device. At the same time, the reed 10 slides within the first hollow channel 24 and the second hollow channel, further enhancing the stability and accuracy of weft yarn tension control. Compared with traditional weft yarn handling methods that rely on complex electronic equipment and delicate mechanical structures, this device reduces manufacturing costs and maintenance difficulty, improves production efficiency, and can better cope with different types of fabrics and variations in weaving processes.

[0042] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. Weft tension control device for a rapier loom, characterized in that, The assembly includes a base (1), a moving rod (2), a stationary rod (3), a scissor shaft (4), a drive assembly, a cam (6), and a reset member (7). The moving rod (2) is rotatably connected to the base (1) via the scissor shaft (4). The stationary rod (3) is fixedly connected to the base (1). The moving rod (2) and the stationary rod (3) are arranged opposite to each other. The drive assembly is mounted on the base (1). The output end of the drive assembly is fixedly connected to the shaft of the cam (6). The outer circumferential surface of the cam (6) abuts against the resistance arm of the moving rod (2). One end of the reset member (7) is assembled with the moving rod (2), and the other end is assembled with the stationary rod (3). The weft yarn passes between the moving rod (2) and the stationary rod (3).

2. The weft thread tension control device for a rapier loom according to claim 1, characterized in that, The moving rod (2) has a first hollow channel (24) inside. The opening direction of the first hollow channel (24) is consistent with the length direction of the moving rod (2). A steel reed (10) is slidably connected to the middle of the first hollow channel (24).

3. The weft thread tension control device for a rapier loom according to claim 2, characterized in that, The interior of the stationary rod (3) is provided with a second hollow channel. The opening direction of the second hollow channel is consistent with the length direction of the stationary rod (3). The reed (10) slides on both the first hollow channel (24) and the second hollow channel.

4. The weft thread tension control device for a rapier loom according to claim 1, characterized in that, An upper pressure block (23) is provided on the power arm of the moving rod (2), and the outer peripheral surface of the cam (6) abuts against the upper surface of the upper pressure block (23).

5. The weft thread tension control device for a rapier loom according to claim 4, characterized in that, The reset component (7) is a spring, one end of which is assembled with the upper pressure block (23) and the other end is assembled with the stationary rod (3).

6. The weft thread tension control device for a rapier loom according to claim 4, characterized in that, A first adjustment component (8) is provided between the stationary rod (3) and the base (1). The first adjustment component (8) is used to fix the stationary rod (3) and adjust its position and height.

7. The weft thread tension control device for a rapier loom according to claim 5, characterized in that, The moving rod (2) includes a main pressure rod (21) and a secondary pressure rod (22). The upper pressure block (23) is fixed on the secondary pressure rod (22). The secondary pressure rod (22) is rotatably connected to the base (1) through the scissor shaft (4). The main pressure rod (21) is located at the end of the secondary pressure rod (22) away from the upper pressure block (23). A second adjustment component (9) is provided between the main pressure rod (21) and the secondary pressure rod (22). The second adjustment component (9) is used to fix the moving rod (2) and adjust its position and height.

8. The weft thread tension control device for a rapier loom according to any one of claims 1 to 7, characterized in that, The drive assembly includes a gear set (51) and a power component. The power component is mounted on the base (1) and is assembled with the input end of the gear set (51). The power output end of the gear set (51) is fixedly connected to the shaft of the cam (6).

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