Weft insertion structure for a rapier loom

Abstract

The utility model relates to the technical field of rapier loom, and disclose a weft insertion structure for rapier loom, the upper surface center of bottom plate is fixedly installed with two fixed plates for supporting, install the tension detection stick for detecting between two fixed plates, the upper surface of bottom plate is provided with the rapier holder for supporting to the side end of fixed plate, one end of rapier holder is fixedly installed with the rapier for activity, through the combination of motor, shaft coupling, screw, connecting sleeve rod, sliding block and slide rail, can realize the linear movement of rapier holder and rapier precision, guarantee the accuracy of rapier weft insertion position each time, improve the precision and quality of fabric weaving, the sliding block slides in the slide rail, provide stable orientation for the movement of rapier holder, avoid the problems such as shaking, deviation during movement, guarantee the stability of weft insertion action, reduce the weft insertion failure probability caused by unstable movement.

Description

Technical Field

[0001] This utility model relates to the field of rapier loom technology, specifically to a weft insertion structure for rapier looms. Background Technology

[0002] Rapier looms, as the most widely used shuttleless looms today, possess significant characteristics such as high speed, high automation, and high-efficiency production. Their active weft insertion method demonstrates strong adaptability to various yarns, and they have outstanding advantages in the field of multi-color weft weaving, capable of producing yarn-dyed products with up to 16 colors of weft yarn. With the continuous innovation of textile technology, shuttleless looms are gradually replacing shuttle looms, and rapier looms are increasingly becoming the core type of machine for woven fabric production. As a key movement link of the loom, weft insertion plays a role in introducing the weft yarn from one side of the loom into the open warp layer. The performance of the weft insertion mechanism that performs this movement directly affects the production quality and efficiency of the fabric.

[0003] Currently, many weft insertion structures on the market have a series of problems that urgently need to be solved. During the weft insertion process, the phenomenon of weft yarns and warp yarns getting tangled together is common. For example, in some weft insertion structures, due to the inaccurate and unstable movement of the rapier, the rapier is prone to deflection during high-speed weft insertion, causing the weft yarn to fail to pass through the warp layer accurately, thus coming into contact with and getting tangled with the warp yarns. This not only seriously affects the quality of the fabric, but also frequently interrupts the production process, requiring technicians to invest a lot of time and energy in timely repairs and adjustments, which greatly reduces production efficiency and increases production costs.

[0004] In terms of yarn clamping adjustment, most existing weft insertion structures lack flexibility. When faced with weft yarns of different materials and thicknesses, it is difficult to quickly and accurately adjust the clamping position and force. For example, some clamping mechanisms have fixed clamping positions, which cannot adapt to diverse weft yarns. For thin weft yarns, it is easy to clamp too tightly, resulting in yarn damage. For thicker weft yarns, it may cause weft insertion failure due to insufficient clamping, which seriously limits the loom's ability to process various types of weft yarns.

[0005] To address the aforementioned issues, we propose a weft insertion structure for rapier looms. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a weft insertion structure for rapier looms, thus solving the aforementioned problems.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a weft insertion structure for a rapier loom, comprising a base plate, two fixed plates for support fixedly installed at the center of the upper surface of the base plate, a tension detection roller for detection installed between the two fixed plates, a rapier seat for support provided on the upper surface of the base plate corresponding to the side end of the fixed plates, a rapier seat for movement fixedly installed at one end of the rapier seat, and further comprising:

[0008] A movable component, mounted on the upper end of the base plate, is used to control the movement of the rapier base.

[0009] Preferably, the movable component includes a motor, a coupling, a lead screw, and a connecting sleeve. The output end of the motor is connected to the coupling, and the other end of the coupling is movably connected to a lead screw for transmission. A connecting sleeve for movement is sleeved on the surface of the lead screw, and the other end of the connecting sleeve is connected to the rapier seat.

[0010] Preferably, a fixed base plate for support is fixedly installed on the upper surface of the base plate corresponding to the outer side of the fixed plate, and support plates for support are fixedly installed on both ends of the fixed base plate. A rotating groove is opened at the center of the support plate, and the lead screw is installed inside the rotating groove.

[0011] Preferably, a slide rail for limiting is fixedly installed on the upper surface of the base plate corresponding to the side end of the fixed base plate, and a slider for moving is slidably installed inside the slide rail, and the rapier seat is fixedly installed on the upper surface of the slider.

[0012] Preferably, a U-shaped mounting frame for support is fixedly installed at the outer end of the sword shaft, and a positioning pin for positioning is fixedly installed at the inner end of the U-shaped mounting frame. A clamping piece for holding is slidably installed on the surface of the positioning pin.

[0013] Preferably, a bolt for rotation is threaded at the center of the side end of the clip, and the other end of the bolt passes through the surface of the U-shaped mounting frame and is connected to the cap.

[0014] Preferably, the outer end of the clip protrudes from the opening of the U-shaped mounting frame.

[0015] Compared with the prior art, this utility model provides a weft insertion structure for rapier looms, which has the following beneficial effects:

[0016] 1. This weft insertion structure for rapier looms, through the combination of a motor, coupling, lead screw, connecting sleeve, slider, and slide rail, enables precise linear movement of the rapier base and rapier, ensuring the accuracy of the weft insertion position each time, improving the precision and quality of fabric weaving. The slider slides within the slide rail, providing stable guidance for the movement of the rapier base, avoiding problems such as shaking and deviation during movement, ensuring the stability of the weft insertion action, and reducing the probability of weft yarn introduction failures caused by unstable movement.

[0017] 2. This weft insertion structure for rapier looms uses a positioning pin to limit the clamping plate, preventing it from tilting and restricting its range of motion. Combined with a rotatable bolt, the clamping position and force of the clamping plate can be easily and flexibly adjusted. It can adapt to the clamping needs of weft yarns of different thicknesses and materials, improving the applicability of the weft insertion structure to various weft yarns. The clamping plate protrudes from the opening end of the U-shaped mounting frame, making it easier to contact the weft yarn and perform the clamping action, ensuring that the weft yarn is reliably clamped during the weft insertion process, reducing weft yarn slippage, and improving the success rate of weft insertion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This is a schematic diagram of the clip of this utility model.

[0021] In the diagram: 1. Base plate; 2. Fixing plate; 3. Tension testing roller; 4. Rapier holder; 5. Rapier; 6. U-shaped mounting frame; 7. Fixing base plate; 8. Supporting upright plate; 9. Lead screw; 10. Motor; 11. Coupling; 12. Connecting sleeve; 13. Slide rail; 14. Slider; 15. Bolt; 16. Cap; 17. Positioning pin; 18. Clamping plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 A weft insertion structure for a rapier loom includes a base plate 1. Two fixed plates 2 for support are fixedly installed at the center of the upper surface of the base plate 1. A tension detection roller 3 for detection is installed between the two fixed plates 2. A rapier seat 4 for support is provided on the upper surface of the base plate 1 corresponding to the side end of the fixed plates 2. A movable rapier 5 is fixedly installed at one end of the rapier seat 4. The structure also includes a movable component installed on the upper end of the base plate 1. The movable component is used to control the movement of the rapier seat 4, the tension detection roller 3 detects the tension of the passing weft yarn, and the movable component controls the movement of the rapier 5.

[0024] Furthermore, the movable components include a motor 10, a coupling 11, a lead screw 9, and a connecting sleeve 12. The output end of the motor 10 is connected to the coupling 11, and the other end of the coupling 11 is movably connected to the lead screw 9 for transmission. The surface of the lead screw 9 is fitted with the connecting sleeve 12 for movement, and the other end of the connecting sleeve 12 is connected to the rapier base 4. The motor 10 controls the lead screw 9 to rotate, and the lead screw 9 synchronously drives the rapier base 4 to move through the connecting sleeve 12.

[0025] Furthermore, a fixed base plate 7 for support is fixedly installed on the upper surface of the base plate 1 corresponding to the outer side of the fixed plate 2. Support plates 8 for support are fixedly installed on both ends of the fixed base plate 7. A rotating groove is opened at the center of the support plate 8, and the lead screw 9 is installed inside the rotating groove. The fixed base plate 7 and the support plate 8 support the lead screw 9.

[0026] Furthermore, a slide rail 13 for limiting is fixedly installed on the upper surface of the base plate 1 corresponding to the side end of the fixed base plate 7. A slider 14 for moving is slidably installed inside the slide rail 13. The rapier seat 4 is fixedly installed on the upper surface of the slider 14. A limiting groove is provided inside the slide rail 13. The slider 14 is installed inside the slide rail 13. The slide rail 13 and the slider 14 allow the rapier seat 4 to move in the horizontal direction.

[0027] Furthermore, a U-shaped mounting frame 6 for support is fixedly installed at the outer end of the sword rod 5, and a positioning pin 17 for positioning is fixedly installed at the inner end of the U-shaped mounting frame 6. A clamping piece 18 for clamping is slidably installed on the surface of the positioning pin 17. The clamping piece is installed inside the U-shaped mounting frame 6. By controlling the movement of the sword rod 5, the U-shaped mounting frame 6 is moved synchronously.

[0028] Furthermore, a bolt 15 for rotation is threaded at the center of the side end of the clamp 18. The other end of the bolt 15 passes through the surface of the U-shaped mounting frame 6 and is connected to the cap 16. By rotating the cap 16, the bolt 15 is controlled, thereby adjusting the distance between the clamp 18 and the U-shaped mounting frame 6.

[0029] Furthermore, the outer end of the clip 18 protrudes from the opening end of the U-shaped mounting frame 6, which facilitates the clamping of the weft yarn.

[0030] Structural Description:

[0031] 1. Base Plate: The base plate is the basic load-bearing component of the entire rapier loom weft insertion structure. It has a plate-like structure and is usually made of high-strength metal to ensure sufficient strength and stability. Its function is to provide an installation support platform for other components. It is firmly connected to the loom frame through bolts and other connectors. It is located at the bottom of the weft insertion structure. During the entire weft insertion process, it bears the weight of other components and various forces generated during operation. It is a key part to maintain the overall stability of the weft insertion structure.

[0032] 2. Fixing plate: The fixing plate is a block structure, fixedly installed at the center of the upper surface of the base plate. It is generally made of metal through machining. The two fixing plates are set parallel to each other. Its main function is to support the tension detection roller. The fixing plate has mounting holes that are compatible with the two ends of the tension detection roller. The tension detection roller is installed between the two fixing plates through bearings and other components, ensuring that the tension detection roller can rotate flexibly and providing stable support for accurately sensing changes in weft tension.

[0033] 3. Tension detection roller: The tension detection roller is a cylindrical structure with a smooth surface. It is mostly made of metal or high-strength engineering plastic and is installed between two fixed plates. During the weft insertion process, it comes into direct contact with the weft yarn. Its working principle is that when the weft yarn tension changes, the force on the tension detection roller changes, which in turn generates a corresponding rotation. The change in weft yarn tension is converted into a mechanical rotation signal so as to monitor and control the weft yarn tension in real time.

[0034] 4. Rapier holder: The rapier holder is a key component that supports the rapier and enables its movement. It has a block or frame-like structure and is mostly made of metal. Its lower surface is fixedly mounted on a slider. The slider moves within the slide rail. The rapier is fixedly mounted on one end of the rapier holder. Driven by the movable components, the rapier moves linearly along the slide rail, completing the weft yarn feeding action in the weft insertion process. It plays an important role in the accuracy and stability of the weft insertion movement.

[0035] 5. Rapier: The rapier is the component that directly performs the weft insertion operation. It is a long strip structure with high strength and rigidity. It is mostly made of lightweight high-strength alloy. One end is firmly installed on the rapier seat, and the other end is installed with a U-shaped mounting frame. Driven by the rapier seat, the rapier moves towards the weft yarn, introducing the weft yarn held by the clamp into the warp layer, thus completing the weft insertion work. Its movement accuracy and reliability directly affect the weaving quality of the fabric.

[0036] 6. U-shaped mounting frame: The U-shaped mounting frame has a U-shaped structure and is made of metal. It is fixedly installed on the outer end of the rapier. Its open end is used to install the clamping piece. The internal positioning pin provides support and guidance for the installation and movement of the clamping piece, ensuring that the clamping piece can stably clamp the weft yarn and accurately transmit the clamping force during the weft insertion process. It is an important component of the yarn clamping mechanism.

[0037] 7. Fixed base plate: The fixed base plate is a plate-shaped structure made of metal. It is fixedly installed on the outer side of the upper surface of the base plate corresponding to the fixed plate. Its function is to provide an installation foundation for the support plate, ensure the stability of the support plate, and thus provide reliable support for the installation and rotation of the lead screw. It plays a connecting and stabilizing role in the transmission system of the entire weft insertion structure.

[0038] 8. Support plate: The support plate is a plate-shaped structure that is vertically installed at both ends of the fixed base plate. It is mostly made of metal, and a rotating groove matching the lead screw is machined at the center of its surface. The lead screw is installed inside the rotating groove, so that the lead screw can be stably supported during rotation, avoiding swaying or deviation, and ensuring the stability and accuracy of the transmission system.

[0039] 9. Lead screw: The lead screw is a slender cylindrical structure with threads machined on the surface. It is usually made of high-strength alloy steel. One end is connected to the motor output end through a coupling, and the other end is installed in the rotating groove of the support plate. Driven by the motor, the lead screw rotates. Through the cooperation of the thread and the connecting sleeve, the rotational motion of the motor is converted into the linear motion of the connecting sleeve, which in turn drives the rapier seat to move. It is the key transmission component for realizing the precise movement of the rapier seat.

[0040] 10. Motor: The motor is the power output component. The common type is the servo motor. It is installed on the upper surface of the base plate corresponding to the side end of the fixed base plate. It is connected to the lead screw through the coupling and provides power for the movement of the entire weft insertion structure. Its speed and direction can be precisely adjusted according to the instructions of the control system, thereby realizing precise control of the moving speed and position of the rapier seat. It is the core power source for the automated operation of the weft insertion structure.

[0041] 11. Coupling: The coupling is a connecting component used to connect the motor output shaft and the lead screw. Rigid or flexible couplings are mostly used. Its function is to smoothly transmit the motor torque to the lead screw, and at the same time, it can compensate for possible installation errors and shaft deviations between the motor and the lead screw, ensuring the stability and reliability of the transmission, and ensuring that there is no slippage or jamming during power transmission.

[0042] 12. Connecting sleeve: The connecting sleeve is a tubular structure with an inner diameter that matches the outer diameter of the lead screw. It has an internal thread that matches the lead screw thread and is generally made of metal. It is sleeved on the surface of the lead screw and one end is connected to the rapier seat. When the lead screw rotates, the connecting sleeve moves linearly along the axial direction under the drive of the lead screw, which drives the rapier seat to move synchronously, so as to achieve precise position adjustment of the rapier.

[0043] 13. Slide rail: The slide rail is a long strip structure, fixedly installed on the upper surface of the base plate corresponding to the side end of the fixed base plate, and set parallel to the fixed base plate. It is mostly made of high-strength metal. It has a groove inside that matches the slider, which is used to guide and support the movement of the slider, ensuring that the slider and the rapier seat installed on it can move stably along a straight line. It is an important component to ensure the linear motion accuracy of the weft insertion structure.

[0044] 14. Slider: The slider is a block structure. Its lower surface matches the groove of the slide rail and can slide within the groove. It is generally made of wear-resistant metal or engineering plastic. The upper surface is fixedly installed with the rapier seat. Driven by the connecting sleeve rod, the rapier seat moves linearly by sliding within the slide rail. The linear motion of the connecting sleeve rod is transmitted to the rapier seat to ensure the smoothness and accuracy of the rapier seat's movement.

[0045] 15. Bolt: The bolt is a common threaded fastener. One end is threaded to the center of the side end of the clamping piece, and the other end passes through the surface of the U-shaped mounting frame and connects to the cap. By rotating the bolt, the clamping piece can be pushed to slide along the positioning pin, thereby adjusting the clamping position and force to accommodate weft yarns of different thicknesses and materials. It is a key operating component for adjusting the yarn clamping mechanism.

[0046] 16. Cap: The cap is a cap-shaped structure installed at one end of the bolt that passes through the surface of the U-shaped mounting frame. Its function is to prevent the bolt from loosening, ensure that the clamping position and force of the clamping piece remain stable during the weft insertion process, ensure the yarn clamping effect, and improve the reliability of weft insertion.

[0047] 17. Positioning pin: The positioning pin is a cylindrical structure, installed inside the U-shaped mounting frame at one end, perpendicular to the U-shaped mounting frame. It is mostly made of metal. Its function is to limit one end of the clamping piece, keep the clamping piece stable in the horizontal direction, prevent the clamping piece from tilting, and limit the range of motion of the clamping piece. This ensures that the clamping piece can slide in the predetermined direction under the push of the bolt, so as to achieve precise yarn clamping adjustment.

[0048] 18. Clip: The clip is a sheet-like structure. One end is installed in the U-shaped mounting frame by a positioning pin, and the other end protrudes from the opening of the U-shaped mounting frame. The material is generally high-strength metal or engineering plastic with a certain degree of elasticity. During the weft insertion process, the position and clamping force of the clip are adjusted by rotating the bolts to clamp the weft yarn and accurately introduce the weft yarn into the warp layer. Its yarn clamping performance directly affects the success rate of weft insertion and the quality of the fabric.

[0049] Working principle: Motor 10 starts and drives lead screw 9 to rotate via coupling 11. When lead screw 9 rotates, connecting sleeve 12 moves axially on the surface of lead screw 9. Since connecting sleeve 12 is connected to rapier seat 4, rapier seat 4 moves with connecting sleeve 12. Rapier seat 4 is fixed on slider 14, which slides within slide rail 13, ensuring linearity and stability of movement. Rapier 5 is fixed on rapier seat 4 and moves synchronously with rapier seat 4. Within the U-shaped mounting frame 6 at the end of rapier 5, positioning pin 17 engages with one end of clamping piece 18. The clamping plate 18 is positioned horizontally to prevent it from tilting and to limit its movement within its range of motion. Rotating the bolt 15 can push one end of the clamping plate 18 inward. The clamping plate 18 slides along the positioning pin 17 to adjust the clamping position and force. The clamping plate 18 protrudes from the opening of the U-shaped mounting frame 6 to facilitate clamping the weft yarn. During the weft insertion process, the weft yarn contacts the tension detection roller 3 installed between the two fixed plates 2. The tension detection roller 3 senses the change in weft yarn tension.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A weft insertion structure for a rapier loom, comprising a base plate (1), two fixed plates (2) for support are fixedly installed at the center of the upper surface of the base plate (1), a tension detection roller (3) for detection is installed between the two fixed plates (2), a rapier seat (4) for support is provided on the upper surface of the base plate (1) corresponding to the side end of the fixed plate (2), and a movable rapier (5) is fixedly installed at one end of the rapier seat (4), characterized in that, Also includes: An active component is installed on the upper end of the base plate (1), and the active component is used to control the movement of the rapier base (4); The movable components include a motor (10), a coupling (11), a lead screw (9), and a connecting sleeve (12). The output end of the motor (10) is connected to the coupling (11), and the other end of the coupling (11) is movably connected to the lead screw (9) for transmission. The surface of the lead screw (9) is fitted with a connecting sleeve (12) for movement, and the other end of the connecting sleeve (12) is connected to the rapier seat (4).

2. The weft insertion structure for a rapier loom according to claim 1, characterized in that: The upper surface of the base plate (1) is fixedly installed with a fixed base plate (7) for support on the outer side of the fixed plate (2). Support plates (8) for support are fixedly installed on both ends of the fixed base plate (7). A rotating groove is opened at the center of the support plate (8), and the screw rod (9) is installed inside the rotating groove.

3. The weft insertion structure for a rapier loom according to claim 1, characterized in that: The upper surface of the base plate (1) is fixedly installed with a slide rail (13) for limiting the position, corresponding to the side end of the fixed base plate (7). The slide rail (13) is slidably installed with a slider (14) for moving. The rapier seat (4) is fixedly installed on the upper surface of the slider (14).

4. The weft insertion structure for a rapier loom according to claim 1, characterized in that: The sword shaft (5) is fixedly installed with a U-shaped mounting frame (6) for support at one outer end, and a positioning pin (17) for positioning is fixedly installed at one inner end of the U-shaped mounting frame (6). A clamping piece (18) for clamping is slidably installed on the surface of the positioning pin (17).

5. The weft insertion structure for a rapier loom according to claim 4, characterized in that: The center of the side end of the clip (18) is threaded with a bolt (15) for rotation, and the other end of the bolt (15) passes through the surface of the U-shaped mounting frame (6) and is connected to the cap (16).

6. The weft insertion structure for a rapier loom according to claim 4, characterized in that: The outer end of the clip (18) protrudes from the opening of the U-shaped mounting frame (6).

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