A gripper device for a rapier
By passively opening the clamping plate and resetting the elastic element, the structure of the rapier yarn clamping device is simplified, the problem of high maintenance costs caused by active opening and closing and tension adjustment is solved, and more efficient maintenance is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGCHEN TECH SHIJIAZHUANG NEW MATERIAL CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-07-31
AI Technical Summary
Existing rapier yarn clamping devices have complex structures due to their active opening and closing mechanisms and tension adjustment mechanisms, which increases maintenance costs.
By adopting a passive opening clamping plate structure and a reset elastic element, the clamping plate is passively opened and automatically reset using the top support and reset elastic element, which simplifies the structure of the yarn clamping device and reduces the number of parts and failure points.
The structure of the yarn clamping device has been simplified, reducing maintenance difficulty and cost, and improving equipment reliability and maintenance efficiency.
Smart Images
Figure CN224578428U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of this utility model relate to the technical field of rapier yarn clamping devices, specifically, to a rapier yarn clamping device. Background Technology
[0002] Rapier looms are one of the core types of modern shuttleless looms. Their core advantage lies in their ability to adapt to the weaving of various types of fabrics made from multiple raw materials (such as cotton, wool, silk, chemical fibers, and special fibers). The yarn clamping device is the key component for achieving "shuttleless weft insertion" in rapier looms. It replaces the shuttle in traditional shuttle looms, is responsible for accurately clamping and feeding the weft yarn, and completing the weft yarn handover within the fabric width. It directly determines the stability of weft insertion, the weaving efficiency of the fabric, and the fabric surface quality.
[0003] The yarn clamping device mainly includes a drive structure and yarn clamping jaws. In operation, the drive mechanism moves the yarn clamping rapier towards the weft yarn until the jaws of the rapier close, clamping the automatically drawn weft yarn. Then, in the clamped state, the rapier is driven back to the other side of the loom until both ends of the weft yarn exceed the fabric width (leaving the fabric edge length). Then, the yarn clamping rapier also releases the weft yarn, and the above operation is repeated to complete the weaving.
[0004] However, the above-mentioned yarn clamping device still has the following drawbacks when in operation: the yarn clamping rapier opens and closes through the active component, which complicates the structure. In addition, a tension adjustment mechanism is usually added to finely adjust the clamping force of the yarn clamping rapier to avoid weft yarn stretching or loosening, which also leads to structural complexity and increases maintenance costs. Utility Model Content
[0005] To overcome the above-mentioned defects, the embodiments of this utility model provide a rapier yarn clamping device, which solves the technical problem that the yarn clamping device in the related art has a complex structure and high maintenance cost due to functions such as active opening and closing or tension adjustment.
[0006] According to one aspect, at least one embodiment of the present invention provides a rapier yarn clamping device, comprising: The frame includes a weft yarn guide and a top support for storing weft yarns. The weft yarn guide and the top support are arranged adjacent to each other. The frame also includes a yarn clamping rapier for gripping and moving the weft yarns. The yarn clamping rapier includes: A base plate is horizontally and reciprocally slidably mounted on the frame. After sliding, the base plate can move closer to or further away from the weft yarn path. A clamping plate is hinged to the base plate. After swinging, the clamping plate can clamp the weft yarn together with the base plate. The end of the clamping plate is provided with a first raised edge. After the base plate slides closer to the weft yarn path, the top support can push open the first raised edge so that the clamping plate can swing open. A reset elastic element is provided, with its two ends connected to the base plate and the clamping plate, respectively, so as to provide a continuous pressing force to the clamping plate against the base plate.
[0007] For example, at least one embodiment of the present invention provides a rapier yarn clamping device, wherein the frame is further provided with a drive assembly for pushing the base plate and a connecting part for horizontal reciprocating sliding. The connecting part can connect the base plate and the drive assembly to transmit the power of the drive assembly to the base plate.
[0008] For example, at least one embodiment of the present invention provides a rapier yarn clamping device, wherein the base plate is disposed at one end of the connecting part and is an elastic plate, the end of the clamping plate near the weft yarn path is provided with a first curved edge that can face upward, the end of the base plate near the weft yarn path is provided with a second curved edge that can face downward, the top of the top support has a first guide surface, and the bottom of the top support has a second guide surface; When the base plate slides close to the weft yarn path, the first guide surface can push open the first raised edge, and the second guide surface can push open the second raised edge, so as to open the base plate and the clamping plate.
[0009] For example, at least one embodiment of this utility model provides a rapier yarn clamping device, wherein the driving component includes: A drive gear is rotatably mounted on the frame and connected to the end of the connecting part away from the base plate. An electric motor, which is mounted on the frame, is used to drive the drive gear to rotate.
[0010] For example, at least one embodiment of this utility model provides a rapier yarn clamping device, wherein the connecting part is an elastic connecting strip, and the end of the connecting part away from the base plate has a plurality of meshing ports arranged at intervals along the length direction of the connecting part. Each meshing port can mesh with the driving gear, and after the driving gear rotates, the connecting part can deform and fit against the outer peripheral wall of the driving gear.
[0011] For example, at least one embodiment of the present invention provides a rapier yarn clamping device, wherein the end of the base plate and / or the end of the clamping plate are provided with magnetic blocks, and the end of the base plate and / or the end of the clamping plate are provided with metal plates, so that the magnetic blocks can be attracted to the metal plates and clamp the weft yarns, and the magnetic blocks and the metal plates are located on adjacent sides of the base plate and the clamping plate.
[0012] For example, at least one embodiment of this utility model provides a rapier yarn clamping device, wherein the top surface of the base plate is provided with a hinge shaft, the hinge shaft passes through the middle of the clamping plate and rotates with the clamping plate.
[0013] For example, at least one embodiment of the present invention provides a rapier yarn clamping device, wherein the side of the base plate is provided with a clearance block, the clearance block is arranged adjacent to the first warp edge, and the top and bottom of the clearance block have clearance guide surfaces for opening the warp yarn.
[0014] For example, at least one embodiment of the present invention provides a rapier yarn clamping device, wherein the side of the clamping plate is provided with a force-receiving part, the force-receiving part is located on the side of the hinge shaft away from the weft yarn path, and the force-receiving part can cause the clamping plate to swing open after being subjected to external force.
[0015] For example, in at least one embodiment of this utility model, a rapier yarn clamping device is provided, wherein the reset elastic element is a reset spring.
[0016] The beneficial effects of the embodiments of this utility model are as follows: First, the clamping plate is "passively opened" by using the "top support part + first raised edge": when the bottom plate of the clamping rapier slides close to the weft yarn path and is ready to clamp the weft yarn, the top support part next to the weft yarn path will simultaneously push open the first raised edge at the end of the clamping plate, so that the clamping plate swings upward to passively open the jaws (i.e. the mating clamping end of the bottom plate and the clamping plate), without the need for additional active drive components to control it.
[0017] Secondly, the "reset elastic element" is used to achieve "automatic reset clamping" of the clamp jaws (i.e., the mating clamping ends of the base plate and the clamping plate): the reset elastic element is connected to the base plate and the clamping plate at both ends, and continuously provides a force to the clamping plate to resist the base plate. Then, when the top support no longer pushes open the first warped edge (such as the process of the clamping rapier moving and resetting the weft yarn, i.e., clamping the weft yarn back to its position), the elastic force of the reset elastic element will drive the clamping plate to swing down automatically and close with the base plate to achieve reset, ensuring that the weft yarn is clamped. The elastic force of the reset elastic element is a constant and appropriate clamping force, which can avoid the weft yarn from being stretched or loosened due to improper clamping force without the need for an additional tension adjustment mechanism.
[0018] In summary, the above structure eliminates the need for active opening and closing drive components and tension adjustment mechanisms, reducing the number of parts and potential failure points. It is also easier to disassemble and troubleshoot during maintenance, thus reducing maintenance difficulty and cost. Through the simple passive "opening and closing" interaction, a simpler mechanical structure replaces the complex active control and adjustment principles, simplifying the overall solution. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of a rapier yarn clamping device in one embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 for Figure 2 Enlarged view of section A in the middle; Figure 4 for Figure 1 A diagram showing the fit between the base plate and the clamping plate in the embodiment; Figure 5 for Figure 1 The swing state diagram of the clamping plate in the embodiment; Figure 6 for Figure 1 A diagram showing the fit between the base plate and the clamping plate in the embodiment; Figure 7 for Figure 6 Enlarged view of section B; Figure 8 for Figure 1 Enlarged view of section C; Figure 9 for Figure 1 Enlarged view of section D in the middle.
[0021] In the diagram: 1. Frame, 2. Weft yarn path, 3. Top support, 301. First guide surface, 302. Second guide surface, 4. Yarn clamping rapier, 401. Base plate, 402. Clamping plate, 5. First curled edge, 6. Reset elastic element, 7. Drive assembly, 701. Drive gear, 702. Motor, 8. Connecting part, 801. Engaging port, 9. Second curled edge, 10. Magnetic block, 11. Metal plate, 12. Hinge shaft, 13. Avoidance block, 1301. Avoidance guide surface, 14. Force-bearing part. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.
[0023] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0024] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] In this invention, unless otherwise explicitly 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 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 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.
[0026] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] Rapier looms are typically installed in the production workshop of textile factories, working in conjunction with equipment such as warping machines and sizing machines. Before the loom is started, raw materials such as carbon fiber wide strips need to be placed on the corresponding storage devices according to certain requirements. At the same time, various parameters of the loom, such as the fabric width and warp and weft density, need to be set. The workshop needs to maintain a suitable temperature and humidity to ensure the stability of the performance of materials such as carbon fiber wide strips, and to ensure the normal operation of the loom and the quality of the fabric.
[0029] Rapier looms typically include a shedding mechanism, a weft insertion mechanism, a beat-up mechanism, a take-up mechanism, and a warp feed mechanism. The shedding mechanism mainly consists of heald frames and healds, and its function is to separate the warp yarns into upper and lower layers to form a shed, allowing the weft yarns to be introduced. The weft insertion mechanism is the core component, namely the rapier yarn clamping device of this application, which includes a frame 1, a weft path 2, a top support 3, a yarn clamping rapier 4 (base plate 401, clamping plate 402, first curling edge 5), and a reset elastic element 6, etc. It also includes a drive device for driving the yarn clamping rapier 4 to reciprocate. The beat-up mechanism generally consists of a reed seat and a steel reed, etc., which is used to beat the weft yarns introduced into the shed towards the weft, making the warp and weft yarns interweave tightly. The take-up mechanism consists of a take-up roller, gears, etc., and is responsible for leading the woven fabric away from the weft and winding it according to a set length. The warp feed mechanism includes a warp beam and a warp feed adjustment device, which can evenly feed the warp yarns according to the weaving requirements of the fabric and maintain stable warp yarn tension.
[0030] Specific working principle: (Using carbon fiber wide band as weft yarn) The shedding mechanism first operates, dividing the warp yarn into upper and lower layers to form a shed. Then, in the weft insertion mechanism, the clamping rapier 4, under the action of the driving device, slides the base plate 401 close to the weft yarn path 2, and the top support 3 pushes open the first raised edge 5 of the clamping plate 402, causing the jaws to open, and the clamping rapier 4 clamps the carbon fiber wide band weft yarn. Subsequently, the clamping rapier 4 returns to the other side of the loom in the clamped state. After the two ends of the weft yarn exceed the fabric width, the clamping rapier 4 releases the weft yarn. Immediately afterwards, the reed of the weft-beating mechanism beats the weft yarn toward the weft shed, so that the carbon fiber wide band interweaves with the warp yarn. Finally, the take-up mechanism leads the woven fabric away from the weft shed and winds it up, while the warp feeding mechanism evenly feeds out the warp yarn. The above process is repeated to achieve continuous weaving of the fabric.
[0031] Fabrics made from carbon fiber wide bands can exhibit various weave structures such as plain weave, twill weave, and satin weave, depending on different weaving techniques. They possess advantages such as high strength and lightweight. Because carbon fiber wide bands themselves have high strength, the fabrics made from them have excellent tensile and compressive strength, making them suitable for fields with extremely high strength requirements, such as aerospace and automotive manufacturing. Moreover, the fabrics are lightweight, which can effectively reduce the weight of the final product. For example, in the aerospace field, it can reduce the weight of aircraft and improve fuel efficiency. During the weaving process, the stable weft insertion and beat-up process of the rapier loom ensures that the warp and weft yarns are neatly arranged, with good dimensional stability and resistance to deformation.
[0032] Regarding the weft insertion mechanism, specifically a rapier yarn clamping device shown in one embodiment of this application, such as... Figure 1 , Figure 2 , Figure 8As shown, the frame 1 serves as the basic support component of the entire device, providing an installation carrier for the weft yarn guide 2, top support 3, and yarn clamping rapier 4. The overall structure is a frame or base-like structure. The weft yarn guide 2, used to store the weft yarn, is bolted or snapped onto the frame 1. It typically uses components with receiving grooves or channels and is arranged adjacent to the top support 3, its position corresponding to the direction of the yarn clamping rapier 4, facilitating the clamping rapier 4's gripping of the weft yarn. The top support 3 is bolted or snapped, structurally employing protruding components such as top blocks and top rods capable of supporting the clamping plate 402. Furthermore, guide rails or other structures can be installed on the frame 1 to allow the yarn clamping rapier 4 to slide horizontally, ensuring stable sliding of the yarn clamping rapier 4. Specifically, for example... Figure 2 , Figure 3 As shown, the yarn clamping rapier 4 includes a base plate 401 and a clamping plate 402. The base plate 401 is a flat plate structure that slides horizontally back and forth on the frame 1. It can slide by the cooperation of the slider and the guide rail on the frame 1. The base plate 401 is provided with a hinge point that is hinged to the clamping plate 402. Generally, a hinge shaft 12 is used to connect them, so that the clamping plate 402 can swing around the hinge point. Similarly, the clamping plate 402 adopts a plate structure and is connected to the base plate 401 through the hinge shaft 12. It is rotatably connected by the hinge shaft 12. Furthermore, a small upward-facing first curved edge 5 is integrally formed or welded on the side of the clamping plate 402 near the weft yarn path 2 to prevent interference with the weft yarn. At the same time, it cooperates with the top support 3 to lift the clamping plate 402 and facilitate yarn clamping.
[0033] As a parallel implementation, the top block structure of the top support 3 can be replaced with a cam structure. When the bottom plate 401 slides close to the weft yarn path 2, the cam rotates and pushes the first raised edge 5, thus achieving the purpose of opening the clamping plate 402. The difference in action is that the contact passive pushing of the top support 3 is changed to the active rotation pushing of the cam.
[0034] Furthermore, after the clamping plate 402 is lifted, in order to achieve the purpose of structural simplification and to enable the clamping plate 402 to automatically swing back and press against the bottom plate 401 after losing the supporting effect of the top support 3, so as to automatically clamp the weft yarn, a reset elastic element 6 (such as a torsion spring, tension spring, etc.) is added. Its two ends are connected to the bottom plate 401 and the clamping plate 402 respectively. If it is a torsion spring, it can be sleeved on the hinge pin between the clamping plate 402 and the bottom plate 401. If it is a tension spring, its two ends are hooked to the hook structure of the bottom plate 401 and the clamping plate 402 respectively, continuously providing the clamping plate 402 with the force of pressing against the bottom plate 401.
[0035] Preferred, such as Figure 2As shown, the reset elastic element 6 is a metal reset spring (such as spring steel). It can continuously provide relatively stable elasticity under long-term and frequent yarn clamping actions, as well as in environments such as temperature and humidity changes and dust during loom operation. It is not easily affected by dust or other adhering materials, thus improving elasticity and normal operation. It is also easy to produce and reduces costs. Specifically, mounting holes or slot structures can be pre-machined on the base plate 401. One end of the metal reset spring can be fixed to the mounting hole by riveting, bolting, or nut fastening. The same structure can be machined at the corresponding position on the clamping plate 402. The other end of the metal reset spring can be hinged to the structure or directly welded by a pin.
[0036] Meanwhile, the hinge shaft 12 located on the top surface of the base plate 401 passes through the middle of the clamping plate 402 and rotatably engages with the clamping plate 402, thus reserving a portion of the clamping plate 402 for easy connection with the metal reset spring; and a force-bearing part 14 can be welded, bolted, or integrally formed on the clamping plate 402, which is located on the side of the clamping plate 402, such as Figure 4 , Figure 5 As shown, the force-bearing part 14 is located on the side of the hinge shaft 12 away from the weft path 2. This allows the clamping plate 402 to swing open after the force-bearing part 14 is subjected to external force. This is because after the weft yarn is slid by the clamping rapier 4 and the weft yarn slides beyond the fabric width at both ends, other mechanisms will start to work. At this time, the clamping rapier 4 needs to release the weft yarn. Therefore, by installing a component that can apply external force to the force-bearing part 14 near the position after the rapier clamps the yarn and returns to its original position on the frame 1, it is convenient to apply force to the force-bearing part 14 on the side of the clamping plate 402 away from the weft path 2 on the hinge shaft 12, so as to release the weft yarn. Once the two ends of the clamp extend beyond the fabric width, the weft yarn is automatically released for subsequent operations. For components that apply external force, either an active or passive method can be used, with the passive method, similar to that of clamping plate 402, being preferred. In this case, the force-bearing part 14 needs to be machined with a bevel similar to the first curled edge 5. At the same time, a top block is installed on the frame 1 near the position after the rapier clamping yarn slides back to its original position. This allows the bevel to slide back to its original position and contact the top block. The top block will then push downwards against the force-bearing part 14, i.e., one end of clamping plate 402, so that the clamping jaws are passively and automatically opened to release the weft yarn. After that, the above operation can be repeated.
[0037] As a further implementation method, such as Figure 6 , Figure 7As shown, the side of the base plate 401 is provided with a clearance block 13, which is adjacent to the first warp edge 5. The top and bottom of the clearance block 13 have clearance guide surfaces 1301 for opening the warp yarns. This is because during the weaving process of the rapier loom, the warp yarns are in a taut and orderly arranged state. When the yarn clamping rapier 4 moves with the weft yarns, especially when it is close to or passes through the warp yarn layer, if there is no special clearance structure, the warp yarns are prone to interference and entanglement with the clamping plate 402 and other components of the yarn clamping rapier 4. This will not only affect the arrangement stability of the warp yarns and cause defects in the fabric, but may also damage the warp yarns or the yarn clamping rapier 4 components. Therefore, the clearance block 13 is added to avoid adverse interference between the warp yarns and the related components of the yarn clamping rapier 4, and to ensure a smooth weaving process.
[0038] Specifically, the clearance block 13 is set on the side of the base plate 401, adjacent to the first raised edge 5, and has a block structure. The top and bottom of the clearance block 13 have clearance guide surfaces 1301. The guide surfaces can be inclined planes or arc surfaces. The purpose is to make contact with the warp yarns through smooth surfaces and push the warp yarns open more smoothly.
[0039] When the base plate 401 of the yarn clamping rapier 4 slides close to the weft yarn path 2 to clamp the weft yarn, or moves through the warp yarn area with the weft yarn after clamping it, the clearance block 13 on the side of the base plate 401 moves accordingly. The clearance guide surface 1301 at the top and bottom of the clearance block 13 will contact the warp yarn. Using the inclined or curved shape of the guide surface, the warp yarn is pushed open to both sides to provide a channel for the yarn clamping rapier 4 (including the clamping plate 402, the first raised edge 5, etc.), so that the yarn clamping rapier 4 can pass smoothly through the warp yarn layer to complete the actions of clamping yarn and inserting weft yarn. After the actions are completed, the warp yarn returns to its original arrangement state under its own tension.
[0040] As a parallel implementation, an avoidance rod can be bolted to the side of the base plate 401. The avoidance rod is a rod-shaped structure that extends along the moving direction of the yarn clamping rapier 4. Inclined avoidance slopes are machined on the top and bottom of the rod, or a spiral avoidance guide surface 1301 is provided on the outer periphery of the rod. When the yarn clamping rapier 4 moves, the avoidance slope or spiral guide surface of the avoidance rod contacts the warp yarn and pushes the warp yarn away to achieve the purpose of avoiding the warp yarn. Alternatively, an elastic avoidance component, such as an elastic rubber block, can be provided on the side of the base plate 401. The top and bottom of the rubber block are provided with avoidance guide surfaces 1301 (inclined or curved surfaces). The rubber block is connected to the base plate 401 through an elastic connection structure (such as a spring or elastic buckle). When it contacts the warp yarn, the elastic avoidance component pushes the warp yarn away through the guide surface, and on the other hand, it can better adapt to the pressure of the warp yarn through elastic deformation, avoiding excessive compression damage to the warp yarn, and also more flexibly avoids the warp yarn.
[0041] As a further implementation method, such as Figure 2 , Figure 3As shown, magnetic blocks 10 are bolted or embedded at the ends of the base plate 401 and / or the clamping plate 402, and metal plates 11 are bolted or embedded at the ends of the base plate 401 and / or the clamping plate 402, so that the magnetic blocks 10 can be attracted to the metal plates 11 and clamp the weft yarn. The magnetic blocks 10 and the metal plates 11 are located on adjacent sides of the base plate 401 and the clamping plate 402. This is because during the yarn clamping process of the rapier loom, the weft yarn is clamped only by the force provided by the reset elastic element 6. In some special cases (such as the weft yarn is thin, the elasticity of the reset elastic element 6 fluctuates, etc.), the clamping may not be firm, causing the weft yarn to fall off during the weft insertion process, affecting the continuity of weaving and the quality of the fabric.
[0042] As a further implementation method, such as Figure 1 , Figure 8 As shown, the frame 1 is also equipped with a drive assembly 7 for pushing the base plate 401 and a connecting part 8 for horizontal reciprocating sliding. The connecting part 8 can connect the base plate 401 and the drive assembly 7 to transmit the power of the drive assembly 7 to the base plate 401. Through the use of the connecting part 8, the loom's drive source can be directly used as the drive assembly 7 to drive the base plate 401, which has a certain distance, to reciprocate horizontally, eliminating the need for additional drive components. Furthermore, the base plate 401 can be designed with the same operating structure as the clamping plate 402, which can more stably clamp the weft yarn and prevent the weft yarn from being interfered with by the base plate 401. Specifically, the base plate 401 is located at the connecting part 8. One end is an elastic plate. The end of the clamping plate 402 near the weft yarn path 2 is provided with a first curved edge 5 that can face upwards. The end of the bottom plate 401 near the weft yarn path 2 is provided with a second curved edge 9 that can face downwards. The top of the top support 3 has a first guide surface 301 and the bottom of the top support 3 has a second guide surface 302. Then, after the bottom plate 401 slides close to the weft yarn path 2, the first guide surface 301 can push the first curved edge 5 upwards and the second guide surface 302 can push the second curved edge 9 downwards to open the bottom plate 401 and the clamping plate 402, so that the weft yarn path 2 can extend between the two and "close" during reset to ensure clamping and holding the weft yarn.
[0043] The drive assembly 7 includes a drive gear 701 and a motor 702. The drive gear 701 is a circular gear structure, rotatably mounted on the frame 1, with teeth evenly distributed on the circumference. It is adapted to the meshing port 801 of the connecting part 8 (elastic connecting strip) to transmit the rotational power of the motor 702. The motor 702 is bolted to the frame 1 as a power source, and its output shaft is connected to the drive gear 701 to drive the drive gear 701 to rotate. The elastic connecting strip (connecting part 8) is long and elastic. At the end away from the base plate 401, a number of meshing ports 801 are spaced apart along the length direction. The shape of each meshing port 801 matches the teeth of the drive gear 701 and can mesh with the drive gear 701. At the same time, the elastic connecting strip can deform when the drive gear 701 rotates and fit against the outer peripheral wall of the drive gear 701.
[0044] In the above structure, the elastic characteristics of the elastic connecting strip enable it to act as a buffer when the drive gear 701 engages with the meshing port 801 to transmit power, reducing the impact force generated during the start-up, shutdown, and rotation of the motor 702, preventing damage to components due to rigid impact, and extending the service life of the device. Furthermore, the several spaced meshing ports 801 can continuously engage with different meshing ports 801 during the rotation of the drive gear 701. Even if the elastic connecting strip has a certain degree of deformation or installation error, it can still ensure stable power transmission, enhance the adaptability of the drive assembly 7 to the base plate 401, and at the same time, the structure is simple and easy to install.
[0045] Working principle: When the rapier yarn clamping device is working, the frame 1 provides support for all components. The weft yarn is pre-placed in the weft yarn path 2 of the frame 1. The reset elastic element 6 causes the clamping plate 402 to press against the base plate 401, and the jaws are in a ready-to-clamp state. The motor 702 drives the drive gear 701 to rotate, which, through meshing with the elastic connecting strip, moves the base plate 401 closer to the weft yarn path 2. The top support 3 pushes open the first raised edge 5 of the clamping plate 402, allowing the jaws to open. Then, the base plate 401 moves the clamping plate 402 slightly to move the weft yarn into a suitable position, away from the weft yarn path 2. When the elastic element 6 is reset, the clamping plate 402 and the base plate 401 close and clamp the weft yarn. Then, under the action of the drive component 7, the clamping rapier 4 slides the weft yarn to the other side of the loom. When the weft yarn is released, the clamping plate 402 is opened by the force-bearing part 14 under the action of external force, or the top support part 3 pushes open the first warp edge 5 again. At the same time, during the above movement, the guide surface of the avoidance block 13 pushes open the warp yarn to avoid interference, and the magnetic block 10 and the metal plate 11 can also assist in clamping. Finally, the drive component 7 drives the clamping rapier 4 to reset and repeats the above operation.
[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A gripper device for a rapier, characterized in that, include: A frame (1) is provided with a weft yarn channel (2) for storing weft yarns and a top support (3). The weft yarn channel (2) and the top support (3) are arranged adjacent to each other. The frame (1) is also provided with a yarn clamping rapier (4) for clamping and moving the weft yarns. The yarn clamping rapier (4) includes: A base plate (401) is horizontally and reciprocally slidably on the frame (1). After sliding, the base plate (401) can move closer to or away from the weft yarn path (2). A clamping plate (402) is hinged on the base plate (401). After swinging, the clamping plate (402) can clamp the weft yarn together with the base plate (401). The end of the clamping plate (402) is provided with a first raised edge (5). After the base plate (401) slides closer to the weft yarn path (2), the top support (3) can push open the first raised edge (5) so that the clamping plate (402) swings open. The rapier yarn clamping device further includes: The reset elastic element (6) is connected at both ends to the base plate (401) and the clamping plate (402) respectively, so as to provide the clamping plate (402) with a continuous pressing force against the base plate (401).
2. A rapier yarn gripping device according to claim 1, wherein The frame (1) is also provided with a drive assembly (7) for pushing the base plate (401) and a connecting part (8) for horizontal reciprocating sliding. The connecting part (8) can connect the base plate (401) and the drive assembly (7) to transmit the power of the drive assembly (7) to the base plate (401).
3. A rapier yarn gripping device according to claim 2, wherein The base plate (401) is located at one end of the connecting part (8) and is an elastic plate. The clamping plate (402) has a first curved edge (5) that can face upward at the end near the weft yarn path (2). The base plate (401) has a second curved edge (9) that can face downward at the end near the weft yarn path (2). The top of the top support (3) has a first guide surface (301), and the bottom of the top support (3) has a second guide surface (302). When the base plate (401) slides close to the weft yarn path (2), the first guide surface (301) can push open the first raised edge (5), and the second guide surface (302) can push open the second raised edge (9) to open the base plate (401) and the clamping plate (402).
4. The rapier yarn clamping device according to claim 2, characterized in that, The driving component (7) includes: A drive gear (701) is rotatably mounted on the frame (1) and connected to the end of the connecting part (8) away from the base plate (401). The motor (702) is mounted on the frame (1) and is used to drive the drive gear (701) to rotate.
5. A rapier yarn gripping device according to claim 4, wherein The connecting part (8) is an elastic connecting strip. The end of the connecting part (8) away from the base plate (401) has a plurality of meshing ports (801) arranged at intervals along the length direction of the connecting part (8). Each meshing port (801) can mesh with the drive gear (701), and after the drive gear (701) rotates, the connecting part (8) can deform and fit against the outer peripheral wall of the drive gear (701).
6. A rapier yarn gripping device according to claim 1, wherein The bottom plate (401) end and / or the clamping plate (402) end are provided with magnetic blocks (10), and the bottom plate (401) end and / or the clamping plate (402) end are provided with metal plates (11) so that the magnetic blocks (10) can be attracted to the metal plates (11) and clamp the weft yarn. The magnetic blocks (10) and the metal plates (11) are located on adjacent sides of the bottom plate (401) and the clamping plate (402).
7. A rapier yarn gripping device according to claim 1, wherein The top surface of the base plate (401) is provided with a hinge shaft (12), which passes through the middle of the clamping plate (402) and rotates with the clamping plate (402).
8. A rapier yarn gripping device according to claim 7, wherein The side of the base plate (401) is provided with a clearance block (13), which is adjacent to the first raised edge (5). The top and bottom of the clearance block (13) have clearance guide surfaces (1301) for opening the warp.
9. A rapier yarn gripping device according to claim 7, wherein The side of the clamp (402) is provided with a force-receiving part (14). The force-receiving part (14) is located on the side of the hinge shaft (12) away from the weft yarn path (2). When the force-receiving part (14) is subjected to external force, the clamp (402) can swing open.
10. A rapier yarn gripping device according to claim 1, wherein The reset elastic element (6) is a reset spring.