Full-width laid-in warp knitting machine and working method of continuous laid-in weft without cutting

Abstract

The application discloses a full-width laid-in warp knitting machine weft yarn non-cutting continuous laying device and a working method thereof, wherein the laying device comprises a weft conveying chain belt, a plurality of rotating hook units are arranged on the weft conveying chain belt at intervals; the rotating hook unit comprises a connecting seat, a rotating part and a reset element; the connecting seat is fixed on the weft conveying chain belt, a clamping hook is fixed on the rotating part; the rotating part is rotatably connected with the connecting seat and is limited to rotate between a first working position and a second working position; the reset element is used for providing a force to keep or reset the rotating part to the first working position; the laying device further comprises an unhooking auxiliary mechanism and a weft yarn baffle. The weft yarn non-cutting continuous laying is realized through the active turning of the clamping hook and the cooperation with the weft yarn baffle, the risk that the weft yarn is easily pulled out from the fabric edge due to the weft yarn cutting in the prior art is reduced, and the structural stability of the laid-in fabric is improved.

Description

Technical Field

[0001] This invention belongs to the field of warp knitting technology, and particularly relates to a continuous weft laying device for a full-width weft-laying warp knitting machine without cutting the weft edge and its working method. Background Technology

[0002] Current full-width weft-laying warp knitting machines generally adopt a process route of weaving first and then cutting. Its core weft-laying mechanism is set symmetrically on both sides, mainly including a circulating weft feed chain and several clamping hooks fixedly installed on the weft feed chain at equal intervals.

[0003] See also Figure 1-2 This is an existing full-width weft-laying warp knitting machine. Its weft-laying mechanism is symmetrically arranged on both sides. This weft-laying mechanism mainly includes a circulating weft feed chain K-1 and several clamping hooks K-2 that are fixedly installed on the weft feed chain at equal intervals. See also Figure 3 Specifically, the clamping hook K-2 is fixedly connected to one end of the strip plate K-4, while the other end of the strip plate K-4 is fixedly connected to the weft conveyor belt K-1. See also... Figure 1-2 During operation, the left and right ends of the weft yarn W are hooked by the clamping hooks K-2 on the left and right weft feed chains (corresponding to the left and right weft laying mechanisms), and move with the weft feed chain K-1 to the looping area, where they are woven together with the warp yarns to form the weft-inserting fabric. Subsequently, the woven weft-inserting fabric P continues to move forward, and when it passes the left and right cutting devices K-3, the weft yarn W of the weft-inserting fabric P is cut off on the left and right sides. At this time, the weft yarn W of the weft-inserting fabric P is separated from the left and right clamping hooks K-2, which is the process of weaving before cutting. The cut weft yarn ends W-1 automatically fall off the clamping hooks under the action of gravity after the weft feed chain rotates and reverses direction, thus realizing the cyclical operation of the clamping hooks.

[0004] If the edges are not trimmed after knitting, the weft yarn W will interfere with the clamping hook K-2 and the weft-inserting fabric P, making it difficult for the weft feed chain K-1 to rotate and potentially damaging the equipment and the weft-inserting fabric P. Therefore, existing full-width weft-inserting warp knitting machines usually require edge trimming. However, since both ends of the weft yarn W become free ends after trimming, the weft yarn W is easily pulled out of the weft-inserting fabric P under external force, resulting in poor structural stability of the weft-inserting fabric P. Summary of the Invention

[0005] To address the shortcomings of existing full-width weft-inserting warp knitting machines, which suffer from easy pulling of the weft yarn at the edge of the weft-inserting fabric and poor structural stability due to the edge-cutting process, this invention provides a continuous weft-laying device for full-width weft-inserting warp knitting machines without edge-cutting and its working method. After the weft laying is completed, the clamping hook can automatically detach from the weft yarn without cutting the end of the weft yarn, thus achieving continuous weft laying without edge-cutting.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A continuous weft-laying device for a full-width weft-laying warp knitting machine without edge trimming, the weft-laying device being symmetrically installed on the left and right sides of the full-width weft-laying warp knitting machine, characterized in that: the weft-laying device includes a weft-feeding chain belt, on which a plurality of rotating hook units are spaced apart; each rotating hook unit includes a connecting seat, a rotating component, and a resetting element; the connecting seat is fixed to the weft-feeding chain belt, and a clamping hook is fixedly provided on the rotating component; the rotating component is rotatably connected to the connecting seat and is limited to rotating between a first working position and a second working position; in the first working position, the hook tip of the clamping hook faces towards The clamping hook is positioned above and used to hook the weft yarn. In the second working position, the hook end of the clamping hook faces the rear opposite to the forward direction of the weft conveyor belt and disengages from the weft yarn. The reset element provides a force to hold or reset the rotating member to the first working position. The device also includes a disengagement auxiliary mechanism and a weft yarn baffle. The disengagement auxiliary mechanism drives the rotating member to rotate to the second working position against the force of the reset element when the rotating hook unit is displaced to the disengagement area downstream of the looping area. The weft yarn baffle prevents the weft yarn from moving along the forward direction of the weft conveyor belt during the disengagement of the clamping hook from the weft yarn.

[0007] Preferably, the rotating member includes a rotating arm and a receiving part fixed on the rotating arm; one end of the rotating arm is rotatably engaged with the connecting seat, and the other end is provided with the clamping hook; the connecting seat is provided with an arc-shaped groove for limiting the sliding stroke of the receiving part; when the rotating member rotates to the point where the receiving part abuts against one end of the arc-shaped groove, it is in the first working position; when the rotating member rotates to the point where the receiving part abuts against the other end of the arc-shaped groove, it is in the second working position.

[0008] Preferably, the rotation angle range of the rotating component is 80° to 100°, and more preferably 90°. That is, the rotating component and the connecting seat are limited to rotating by a corresponding angle between a first working position and a second working position.

[0009] Preferably, the rotating arm has a relief bend in the middle; the relief bend is arranged in a direction away from the receiving part.

[0010] Preferably, the unhooking auxiliary mechanism includes a rotary power source and a prying tooth; the prying tooth is driven to rotate by the rotary power source and is used to pry the prying part so that the rotating part rotates to the second working position and then disengages from the prying part.

[0011] Preferably, the reset element is a torsion spring; the torsion spring is coaxially mounted with the rotating component, one end of the torsion spring is connected to the rotating component, and the other end of the torsion spring is connected to the connecting seat.

[0012] Preferably, the weft yarn baffle is provided with a weft yarn blocking groove, which is located on the path of the weft yarn and is used to block the weft yarn from moving along the forward direction of the weft conveyor belt.

[0013] Preferably, the weft-blocking groove is a V-shaped groove or a U-shaped groove.

[0014] The present invention also discloses a working method, employing the weft-laying device described in any of the above claims, characterized by comprising the following steps: Yarn hooking step: The rotating hook unit in the first working position moves forward with the weft conveyor belt to the yarn laying start end, and the clamping hook hooks the weft yarn; Weft laying step: The weft conveyor belt drives the clamping hook and the hooked weft yarn to move towards the looping area, and the weft yarn is woven to form a weft-inserting fabric; Unhooking step: The rotating hook unit carrying the weft yarn moves forward with the weft conveyor belt to the disengagement area downstream of the looping area. The unhooking auxiliary mechanism drives the rotating component to rotate from the first working position to the second working position. During the separation of the clamping hook from the weft yarn, the weft yarn baffle prevents the weft yarn from moving along the forward direction of the weft conveyor belt, and the clamping hook actively separates from the weft yarn. Reset Step: After the rotating hook unit leaves the disengagement area, the force of the disengagement auxiliary mechanism disappears, and the reset element drives the rotating component to reset from the second working position to the first working position.

[0015] Furthermore, in the unhooking step, the teeth of the unhooking auxiliary mechanism rotate and actuate the actuated part on the rotating member, causing the rotating member to overcome the elastic force of the reset element and rotate to the second working position, thereby switching the hook end of the clamping hook from facing upward to facing backward.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: First, this invention achieves continuous weft laying without edge cutting by coordinating the rotating hook unit, the unhooking auxiliary mechanism, and the weft yarn baffle, which helps reduce the risk of the weft yarn being pulled out from the edge of the fabric. Since the clamping hook can actively rotate to the second working position and separate from the weft yarn, the weft yarn remains continuous at the end and is not cut, thereby reducing the risk of weft yarn being pulled out due to the free end. Because the weft yarn is not cut at the edge and remains continuous within the width (bow-shaped path), the dependence on the edge cutting device can be reduced. After the weft yarn is drawn out from the bobbin, it runs through the entire width of the fabric without being cut at both ends, which improves the weft yarn's resistance to being pulled out and helps to improve the stability of the fabric structure. Secondly, the present invention eliminates the edge trimming process, eliminating the need for edge trimming devices (such as cutters and edge trimming motors), thereby increasing the utilization rate of weft yarns and reducing end waste, which helps to reduce corresponding maintenance steps; Third, the present invention allows the rotating hook unit to replace the fixed clamping hook of the existing full-width weft-inserting warp knitting machine, while the hook release auxiliary mechanism and weft baffle can be installed on the frame of the existing full-width weft-inserting warp knitting machine by means of addition, so as to reduce the large-scale modification of the whole machine, and enable the existing full-width weft-inserting warp knitting machine to achieve structural modification with reduced modification amount; Fourth, the present invention achieves stable fixed-point blocking of the weft yarn through the weft yarn blocking groove on the weft yarn baffle. When the rotating part rotates to the second working position, the clamping hook is in a horizontal state. The weft yarn is blocked by the weft yarn blocking groove and its continued forward, upward and downward displacement is restricted. The horizontal clamping hook moves forward with the weft conveyor belt, so that the horizontal clamping hook and the blocked weft yarn move relatively horizontally at the same height. This ensures that the end of the weft yarn is smoothly disengaged from the clamping hook and avoids the problem that the end of the weft yarn may fail to disengage in time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the working state of a full-width weft-lined warp knitting machine in the prior art.

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0019] Figure 3 This is a schematic diagram of the weft-laying device structure of a full-width weft-laying warp knitting machine in the prior art.

[0020] Figure 4 This is a schematic diagram of the working state of a continuous weft laying device for a full-width weft-laying warp knitting machine (when configured on a full-width weft-laying warp knitting machine).

[0021] Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0022] Figure 6 This is a schematic diagram of the structure of a continuous weft laying device for a full-width weft-laying warp knitting machine without cutting the weft edge, according to the present invention.

[0023] Figure 7 yes Figure 6 Enlarged view of point C.

[0024] Figure 8 yes Figure 7 Working status diagram of continuous weft laying without cutting edges.

[0025] Figure 9-10This is a diagram showing the working state of the disengagement auxiliary mechanism when the teeth just contact and drive the rotating component to rotate from the first working position.

[0026] Figure 11-12 This is a diagram showing the working state when the teeth of the disengagement auxiliary mechanism have rotated 90° to the second working position, and the teeth and the rotating part are just disengaged.

[0027] Figure 13-14 This is a diagram showing the working state of the rotating component of the rotating hook unit when it is in the first working position.

[0028] Figure 15 This is a diagram showing the working state of the rotating component of the rotating hook unit when it is in the second working position.

[0029] Figure 16 This is a diagram showing the working state of the rotating hook unit when the reset element is a tension spring in Embodiment 2. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figure 1-3 Existing full-width weft-laying warp knitting machines typically employ a weaving-then-cutting process. Since the ends of the weft yarns need to be continuously held by clamping hooks to complete the weft laying, and these clamping hooks are used cyclically with the weft feed chain K-1, the ends of the weft yarns need to be cut after the fabric leaves the looping area. Otherwise, the weft feed chain will have difficulty rotating normally, and the equipment may interfere or even be damaged. Therefore, existing full-width weft-laying warp knitting machines usually perform edge-cutting of the weft yarns after knitting. This invention addresses this process constraint by proposing a method to allow the clamping hooks to hold the ends of the weft yarns during knitting without cutting them, and to automatically separate from the ends after knitting. This ensures both the continuity of the weft yarn ends W-1 at the fabric edge (preventing free ends) and the cyclic reuse of the clamping hooks, as well as continuous operation of the equipment. The specific embodiments and working principles of this invention are as follows; Example 1: See also Figures 4 to 15 A continuous weft-laying device for a full-width weft-laying warp knitting machine without cutting the weft yarn edge. See also... Figure 4 The weft-laying device is symmetrically installed on the left and right sides of the full-width weft-laying warp knitting machine. Since the structures on the left and right sides are basically the same and the working process is symmetrical, only one side will be used as an example for detailed description below. In this embodiment, "front" refers to the direction of movement of the horizontal working section on the weft feed chain 1, and "rear" refers to the direction opposite to the direction of movement.

[0031] See Figure 5-7 The weft laying device includes a weft feeding chain 1, several rotating hook units 2, a hook release auxiliary mechanism 3, and a weft yarn baffle 4.

[0032] The weft delivery chain 1 (or "weft delivery chain," "chain," or other similar names) is a loop-shaped circulating chain that moves continuously along a predetermined closed trajectory. The weft delivery chain 1 is driven by a drive wheel 1-1 and a driven wheel 1-2, with the drive wheel 1-1 driven by a motor. The speed of the weft delivery chain 1 matches the knitting speed of the full-width weft-laying warp knitting machine to ensure stable weft tension of the weft yarn W. The weft delivery chain 1 can employ existing motion methods, which are not the focus of this invention and will not be described in detail.

[0033] See Figure 13-15 The rotating hook unit 2 includes a connecting seat 2-1, a rotating component 2-2, and a reset element 2-3.

[0034] See Figure 5-7 Each of the rotating hook units 2 is fixedly mounted on a link of the weft conveyor belt 1 at intervals via its connecting seat 2-1. Preferably, the connecting seat 2-1 is welded or screwed to the weft conveyor belt 1.

[0035] See Figure 5-7 The connecting seat 2-1 is provided with a rotating hole 2-12 and an arc-shaped groove 2-11 concentric with the rotating hole 2-12. Preferably, the central angle of the arc-shaped groove 2-11 is 80-100 degrees.

[0036] See Figure 5-7 Specifically, the rotating component 2-2 includes a rotating arm 2-21, a clamping hook 2-4 integrally fixed to the free end of the rotating arm 2-21, and a receiving part 2-22 integrally disposed in the middle of the rotating arm 2-21; the end of the rotating arm 2-21 away from the clamping hook 2-4 is a rotating end and rotates in cooperation with the rotating hole 2-12, such as a clearance fit or a bushing bearing; the end 2-221 of the receiving part 2-22 extends into the arc-shaped groove 2-11 of the connecting seat 2-1 and slides in cooperation with the arc-shaped groove 2-11.

[0037] See Figure 13-14 When the receiving part 2-22 abuts against one end (upper end) of the arc-shaped groove 2-11, the rotating part 2-2 is in the first working position. See also Figure 5 and Figure 8 At this time, the hook end 2-41 of the clamping hook 2-4 is vertically upward, used to hook the end W-1 of the weft yarn W; the end W-1 is a U-shaped rotating part.

[0038] See Figure 15 When the receiving part 2-22 abuts against the other end (lower end) of the arc-shaped groove 2-11, the rotating part 2-2 is in the second working position. See also Figure 5 and Figure 8At this time, the hook end 2-41 of the clamping hook 2-4 is horizontally backward (that is, in the opposite direction to the movement of the weft conveyor belt 1), so that when the relative front and back horizontal movement occurs, the weft yarn W can naturally slip off the clamping hook 2-4.

[0039] See Figure 14 In this embodiment, the reset element 2-3 is a torsion spring. This torsion spring is fitted onto the rotating end of the rotating member 2-2, with one end fixedly connected to a fixed or integrally formed baffle 2-5 on the rotating end (e.g., by welding, plugging, or other means), and the other end fixedly connected to the connecting seat 2-1 (e.g., by welding, plugging, or other means). The preload torque of the torsion spring is set to drive the rotating member 2-2 to rotate from the second working position to the first working position, thereby ensuring that the rotating member 2-2 always tends towards and remains in the first working position without external driving force.

[0040] See Figure 4-8 The unhooking auxiliary mechanism 3 is installed on the frame of the full-width weft-inserting warp knitting machine and is located in the unhooking area of ​​the weft feed chain 1. The unhooking area refers to the straight section of the area after the completed weft-inserting fabric P has detached from the looping area and before the weft feed chain 1 begins to rotate downwards.

[0041] In this embodiment, the unhooking auxiliary mechanism 3 includes a rotary power source 3-1 and a prying tooth 3-2. The rotary power source 3-1 can be a servo motor or a stepper motor, etc. (rotating uniformly during operation). The prying tooth 3-2 is fixedly mounted on the output shaft of the rotary power source 3-1; the prying tooth 3-2 is located above the upper horizontal working section of the weft conveyor belt 1. The rotation period of the prying tooth 3-2 matches the time interval between adjacent rotating hook units 2 passing through the disengagement area, so that one protruding tooth 3-21 correspondingly actuates one actuated part 2-22.

[0042] Specifically, the teeth 3-2 are provided with a plurality of evenly distributed convex teeth 3-21 around the circumference; preferably, there are 4-12 convex teeth 3-21.

[0043] In addition, a clearance bend 2-211 is provided in the middle of the rotating arm 2-21. The clearance bend 2-211 is arranged in a direction away from the receiving part 2-22 to avoid interference between the prying tooth 3-2 and the rotating arm 2-21 during rotation.

[0044] See Figure 4 The rotating hook unit 2 moves forward in a straight line with the weft conveyor belt 1 and enters the disengagement area. (See also...) Figure 6When the rotation center line of the rotating component 2-2 of the rotating hook unit 2 is directly below the rotation center line of the prying tooth 3-2, the protruding tooth 3-21 of the rotating prying tooth 3-2 contacts and pushes the prying part 2-22 from the rear, causing the rotating component 2-2 to overcome the elastic force of the reset element 2-3 and rotate in the positive direction relative to the connecting seat 2-1 (i.e., from the first working position to the second working position, see [reference]). Figure 9-10 Meanwhile, the prying tooth 3-2 is configured such that when the rotating member 2-2 rotates to the second working position (i.e., the prying part 2-22 abuts against the lower end of the arc-shaped groove 2-11), the protruding tooth 3-21 of the prying tooth 3-2 disengages from the prying part 2-22 (see...). Figure 11-12 When the external force input is terminated (i.e., there is no contact between the prying teeth 3-2 and the prying teeth), the rotating part 2-2 is automatically rotated in the opposite direction under the action of the reset element 2-3 (such as the torque of a torsion spring) and reset back to the first working position.

[0045] See Figure 12 and Figure 6-8 During the unhooking process, the weft baffle 4 is used to prevent the weft yarn W from being driven forward by the clamping hook 2-4 as it disengages from the weft yarn W. The weft yarn W is blocked by the weft baffle 4 and remains relatively stationary, while the clamping hook 2-4 is driven forward by the weft conveyor belt 1. The clamping hook 2-4, which is in a horizontal state, will move relative to the weft yarn W, thereby achieving separation.

[0046] Specifically, the weft yarn baffle 4 is fixedly installed on the frame and located in the disengagement area of ​​the weft conveyor belt 1. A weft yarn blocking groove 4-1 is provided on the rear side of the weft yarn baffle 4. The weft yarn blocking groove 4-1 is at the same height as the weft yarn W. The weft yarn baffle 4 is close to the clamping hook 2-4 of a rotating hook unit 2 that is turned by the hook release auxiliary mechanism 3. When the rotating component 2-2 rotates to the second working position, the clamping hook 2-4 is in a horizontal state. The weft yarn blocking groove 4-1 blocks the weft yarn W and restricts its further forward, upward, and downward displacement. The horizontal clamping hook 2-4 moves forward with the weft conveyor belt 1, so that the horizontal clamping hook 2-4 and the blocked weft yarn W move relatively horizontally at the same height. This ensures that the end of the weft yarn W is smoothly disengaged from the clamping hook 2-4, avoiding the problem that the end W-1 of the weft yarn W may fail to disengage in time.

[0047] This embodiment describes the working method of a continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming, which includes the following steps: S10 Yarn hooking step: The rotating hook unit 2, which is in the first working position, moves forward with the weft conveyor chain 1 to the yarn laying start end, and the clamping hooks 2-4 hook the weft yarn W. This step is the same as the working principle of the prior art, so it will not be described in detail. S20 weft laying step: The weft conveyor chain 1 drives the clamping hooks 2-4 and the hooked weft yarn W to move towards the looping area, and the weft yarn W is woven to form the weft-inserting fabric P. This step is the same as the working principle of the prior art, so it will not be described in detail. S30 Unhooking Step: The rotating hook unit 2 carrying the weft yarn W moves forward with the weft conveyor belt 1 to the disengagement area downstream of the looping area. The unhooking auxiliary mechanism 3 drives the rotating component 2-2 to rotate from the first working position to the second working position. During the separation of the clamping hook 2-4 from the weft yarn W, the weft yarn baffle 4 prevents the weft yarn W from moving along the forward direction of the weft conveyor belt 1. Then, the clamping hook 2-4 actively separates from the weft yarn W.

[0048] S40 Reset Step: After the rotating hook unit 2 leaves the disengagement area, the force of the disengagement auxiliary mechanism 3 disappears, and the reset element 2-3 drives the rotating part 2-2 to reset from the second working position back to the first working position. At this time, the clamping hook 2-4 becomes vertically upward again.

[0049] Subsequently, the rotating hook unit 2, along with the weft feed chain 1, bypasses the rotating end and returns to the yarn laying start end, entering the next working cycle.

[0050] In the S30 unhooking step, the method for actively separating the clamping hook from the weft yarn is as follows: the rotational power source 3-1 of the unhooking auxiliary mechanism 3 drives the prying tooth 3-2 to rotate; the protruding tooth 3-21 of the prying tooth 3-2 contacts and pushes the prying part 2-22 on the rotating member 2-2 from the rear of the movement, so as to drive the rotating member 2-2 to overcome the elastic force of the reset element 2-3 and rotate around the rotation center to the second working position; the rotating member 2-2 switches from the first working position to the second working position. The position, that is, the hook end 2-41 of the clamping hook 2-4 changes from vertically upward to horizontally backward (i.e., from facing upward to facing backward); when the hook end 2-41 of the clamping hook 2-4 is in a horizontal state (i.e., the clamping hook 2-4 moves horizontally forward with the weft feed chain 1) and moves relative to the weft yarn W (i.e., the part of the weft yarn W near the end W-1 is blocked by the weft yarn baffle 4 and remains relatively stationary), the end W-1 of the weft yarn W of the weft-inserting fabric P will slide backward from the clamping hook 2-4 in the horizontal state. During this process, the end W-1 of the weft yarn W of the weft-inserting fabric P is not cut off (due to the configuration of two symmetrical weft laying devices on the left and right, both sides of the weft yarn W of the weft-inserting fabric P detach from the corresponding clamping hook 2-4 at the same time), so that the left and right ends W-1 of the weft yarn W of the weft-inserting fabric P maintain continuity and integrity (see See Figure 5 and Figure 8 ).

[0051] Example 2: This example is basically the same as Example 1, except that: see... Figure 16 In this embodiment, the reset element 2-3 is a tension spring. One end of the tension spring is fixed (or hooked) to the connecting seat 2-1, and the other end is fixed (or hooked) to the clearance bend 2-211 of the rotating arm 2-21. When the protruding tooth 3-21 of the release auxiliary mechanism 3 contacts and pushes the receiving part 2-22 on the rotating member 2-2 from the rear, that is, when the rotating member 2-2 moves from the first working position to the second working position, the tension spring is stretched, which overcomes the elastic force of the reset element 2-3. When the protruding tooth 3-21 of the release auxiliary mechanism 3-2 disengages from the receiving part 2-22, the tension spring automatically contracts, driving the rotating member 2-2 to reset and rotate from the second working position to the first working position. Other structures and working methods are the same as in embodiment 1, and will not be described again here.

[0052] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A continuous weft-laying device for a full-width weft-laying warp knitting machine, wherein the weft-laying device is symmetrically installed on the left and right sides of the full-width weft-laying warp knitting machine, characterized in that: The weft laying device includes a weft conveyor belt (1), and a plurality of rotating hook units (2) are provided at intervals on the weft conveyor belt (1). The rotating hook unit (2) includes a connecting seat (2-1), a rotating component (2-2), and a resetting element (2-3); the connecting seat (2-1) is fixed on the weft conveyor belt (1), and a clamping hook (2-4) is fixed on the rotating component (2-2). The rotating component (2-2) is rotatably connected to the connecting seat (2-1) and is limited to rotating between a first working position and a second working position; in the first working position, the hook end (2-41) of the clamping hook (2-4) faces upward and is used to hook the weft yarn (W); in the second working position, the hook end (2-41) of the clamping hook (2-4) faces backward opposite to the forward direction of the weft conveyor belt (1) and disengages from the weft yarn (W); The reset element (2-3) is used to provide a force to hold or reset the rotating member (2-2) to the first working position; It also includes a decoupling auxiliary mechanism (3) and a weft baffle (4); The unhooking auxiliary mechanism (3) is used to drive the rotating component (2-2) to rotate to the second working position against the force of the reset element (2-3) when the rotating hook unit (2) is displaced to the disengagement area downstream of the looping area; The weft baffle (4) is used to prevent the weft yarn (W) from moving along the forward direction of the weft conveyor belt (1) during the process of the clamping hook (2-4) disengaging from the weft yarn (W).

2. The continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming as described in claim 1, characterized in that: The rotating component (2-2) includes a rotating arm (2-21) and a receiving part (2-22) fixed on the rotating arm (2-21). One end of the rotating arm (2-21) is rotatably engaged with the connecting seat (2-1), and the other end is provided with the clamping hook (2-4); the connecting seat (2-1) is provided with an arc-shaped groove (2-11) for limiting the sliding stroke of the receiving part (2-22); when the rotating member (2-2) rotates to the point where the receiving part (2-22) abuts against one end of the arc-shaped groove (2-11), it is in the first working position; when the rotating member (2-2) rotates to the point where the receiving part (2-22) abuts against the other end of the arc-shaped groove (2-11), it is in the second working position.

3. The continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming, as described in claim 2, is characterized in that: The rotation angle range of the rotating component (2-2) is 80° to 100°.

4. The continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming as described in claim 2, characterized in that: The rotating arm (2-21) is provided with a clearance bend (2-211) in the middle; the clearance bend (2-211) is arranged in a direction away from the receiving part (2-22).

5. The continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming, as described in claim 2, is characterized in that: The unhooking auxiliary mechanism (3) includes a rotary power source (3-1) and a prying tooth (3-2). The prying tooth (3-2) is driven to rotate by the rotary power source (3-1) and is used to pry the prying part (2-22) so that the rotating part (2-2) rotates to the second working position and then disengages from the prying part (2-22).

6. A continuous weft-laying device for a full-width weft-laying warp knitting machine without edge trimming, as described in any one of claims 1-5, characterized in that: The reset element (2-3) is a torsion spring; the torsion spring is coaxially mounted with the rotating part (2-2), one end of the torsion spring is connected to the rotating part (2-2), and the other end of the torsion spring is connected to the connecting seat (2-1).

7. The continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming as described in claim 1, characterized in that: The weft baffle (4) is provided with a weft blocking groove (4-1), which is located on the path of the weft yarn (W) and is used to block the weft yarn (W) from moving along the forward direction of the weft conveyor belt (1).

8. The continuous weft laying device for a full-width weft-laying warp knitting machine without edge trimming, as described in claim 7, is characterized in that: The weft-blocking groove (4-1) is a V-shaped groove or a U-shaped groove.

9. A working method, employing a full-width weft-laying warp knitting machine weft yarn non-cutting edge continuous weft laying device as described in any one of claims 1-8, characterized in that, Includes the following steps: Yarn hooking step: The rotating hook unit (2) in the first working position moves forward with the weft conveyor belt (1) to the yarn laying start end, and the clamping hook (2-4) hooks the weft yarn (W). Weft laying step: The weft conveyor belt (1) drives the clamping hook (2-4) and the hooked weft yarn (W) to move towards the looping area, and the weft yarn (W) is woven to form a weft-inserting fabric (P). Unhooking step: The rotating hook unit (2) carrying the weft yarn (W) moves forward with the weft conveyor belt (1) to the disengagement area downstream of the looping area. The unhooking auxiliary mechanism (3) drives the rotating part (2-2) to rotate from the first working position to the second working position. During the separation process of the clamping hook (2-4) and the weft yarn (W), the weft yarn baffle (4) prevents the weft yarn (W) from moving along the forward direction of the weft conveyor belt (1). The clamping hook (2-4) actively separates from the weft yarn (W). Reset Step: After the rotating hook unit (2) leaves the disengagement area, the force of the unhooking auxiliary mechanism (3) disappears, and the reset element (2-3) drives the rotating part (2-2) to reset from the second working position to the first working position.

10. The working method according to claim 9, characterized in that: In the unhooking step, the teeth (3-2) of the unhooking auxiliary mechanism (3) rotate and actuate the actuated part (2-22) on the rotating part (2-2), so that the rotating part (2-2) overcomes the elastic force of the reset element (2-3) and rotates to the second working position, thereby changing the hook end (2-41) of the clamping hook (2-4) from facing upward to facing backward.

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