Warp knitting machine yarn guide device capable of automatically stopping after yarn breakage

Abstract

The utility model relates to the technical field of warp knitting machine yarn guiding, and discloses a warp knitting machine yarn guiding device capable of automatically stopping when yarn is broken, which comprises a mounting seat, a bottom frame is arranged in the mounting seat, a yarn guiding pipe used for guiding yarn is movably arranged outside the bottom frame, a connecting column is fixed at the bottom end of the yarn guiding pipe, and the connecting column is arranged in the bottom frame in a sliding mode. A self-stop assembly enabling the warp knitting machine to stop yarn guiding when yarn is broken is arranged outside the yarn guiding pipe, the self-stop assembly comprises a lever arranged at the top end of the bottom frame, one end of the lever is fixedly connected with the yarn guiding pipe, and a trigger plate is assembled at the other end of the lever. When the yarn is broken, the compression potential energy of the first spring is quickly released, and the vertical movement of the yarn guide tube is converted into the rotation of the lever through the connecting column, so that the reliable contact between the trigger plate and the travel switch is ensured. When the trigger plate is in contact with the contact of the travel switch, the travel switch sends a shutdown instruction to the warp knitting machine controller through a signal line, and the equipment stops running immediately.

Description

Technical Field

[0001] The utility model relates to the technical field of yarn guides for warp knitting machines, in particular to a yarn guide device for warp knitting machines capable of automatically stopping upon thread breakage. Background Art

[0002] In the field of textile machinery, warp knitting machines are core equipment for high-speed weaving. The operational stability of their yarn guide systems directly determines fabric quality and production efficiency. During the yarn feeding process, factors such as yarn tension fluctuations, mechanical vibration, and equipment aging can all lead to thread breakage. Failure to detect and shut down the machine in a timely manner not only results in yarn waste but can also cause secondary accidents such as needle damage. Therefore, yarn guide devices are now available on the market that can shut down the warp knitting machine when a thread break occurs.

[0003] For example, China's patent authorization publication number CN222043500U discloses a yarn guide device with a wire breakage detection function. When the yarn breaks, the existing device sets the No. 1 steel wire to recover, and the spring acts as a buffer. The spring contacts the button battery, and one end of the button battery is electrically connected to the No. 1 steel wire. When the spring contacts the other end of the button battery, a circuit is formed between the button battery, the No. 1 steel wire, the LED lamp bead, the No. 2 steel wire and the spring, and the LED lamp bead lights up to remind the staff that the yarn is broken. Although the existing device can adopt the detection principle of the on-off control circuit of the steel wire deformation to achieve the prompt effect, its technical limitations are mainly reflected in the following three aspects: First, there are multi-stage energy conversion losses in the mechanical transmission chain. The yarn tension needs to go through physical processes such as steel wire bending and spring deformation to be converted into an electrical signal, resulting in a response delay; second, the anti-interference ability is weak. A slight deviation of the steel wire caused by equipment vibration can trigger a false alarm, and the insufficient deformation of the yarn during low-tension operation will lead to missed detection; third, fault location relies entirely on manual troubleshooting. The traditional device can only provide a global shutdown signal. The operator needs to check multiple groups of yarn guide channels one by one to determine the location of the broken wire, and there is a problem of long single fault processing time. Utility Model Content

[0004] The purpose of the utility model is to provide a yarn guiding device for a warp knitting machine with automatic stop when the thread breaks. When the thread breaks during the yarn guiding process, the trigger plate will automatically contact the contacts of the travel switch. The travel switch sends a stop command to the warp knitting machine controller through a signal line, and the equipment will stop running immediately.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a yarn guiding device of a warp knitting machine that automatically stops when the thread breaks, comprising a mounting seat, a base frame being provided in the mounting seat, a yarn guide tube for guiding yarn being movably provided outside the base frame, a connecting column being fixed to the bottom end of the yarn guide tube, and the connecting column being slidably provided in the base frame.

[0006] An automatic stop assembly is provided outside the yarn guide tube, which stops the warp knitting machine from guiding yarn when the yarn is broken. The automatic stop assembly includes a lever provided on the top of the base frame, one end of the lever is movably connected to the yarn guide tube, and the other end of the lever is equipped with a trigger plate.

[0007] A first support plate is arranged on the outer side of the base frame, a travel switch is arranged on the top of the first support plate, and the travel switch is electrically connected to the warp knitting machine controller through a signal line.

[0008] When the yarn guide tube is displaced due to yarn breakage, the lever rotates around its fulcrum, the trigger plate can contact the contact of the travel switch, and the travel switch stops the warp knitting machine through the control system.

[0009] Preferably, a mounting groove is provided at the top of the base frame, a column is fixed in the mounting groove, and the lever is rotatably connected to the top of the column.

[0010] Preferably, a counterweight is provided at one end of the lever away from the yarn guide tube, and the trigger plate is fixedly connected to the bottom end of the counterweight.

[0011] Preferably, the outer wall of the column is provided with an annular plate, and a buffer spring is fixed outside the annular plate. The buffer spring is fixedly connected to a connection ring preset on the side wall of the counterweight block by hooking on a side away from the annular plate.

[0012] Preferably, a broken wire marking assembly for marking the broken wire is provided in the base frame, and the broken wire marking assembly includes a second support plate fixed to the top of the base frame, and a parallel frame is fixed to the top of the second support plate through insulating bolts, and the parallel frame is a copper conductive frame, and a plurality of LED lights are connected in parallel to the top of the parallel frame through wires.

[0013] Preferably, the bottom end of the parallel frame is provided with a plurality of plug holes corresponding to the LED lights, and the inner wall of the plug holes is provided with a conductive spring. The top end of the yarn guide tube is fixed with a trigger block made of conductive metal material, and the trigger block is connected in series with the power circuit of the warp knitting machine through a wire.

[0014] When the trigger block moves up along with the yarn guide tube and is plugged into the plug hole, the corresponding branch circuit is closed and the LED light is energized and illuminated.

[0015] Preferably, a guide groove is provided in the base frame, and the connecting column is slidably connected to the guide groove.

[0016] A first spring is provided in the guide groove, the top end of the first spring is fixedly connected to the bottom end of the connecting column, and the bottom end of the first spring is fixedly connected to the bottom of the guide groove.

[0017] Compared with the prior art, the present invention provides a yarn guide device for a warp knitting machine that automatically stops when the thread breaks, which has the following beneficial effects:

[0018] 1. This warp knitting machine's yarn guide device with automatic stop upon thread breakage rapidly releases the compressed potential energy of the first spring when a thread breakage occurs, converting the vertical motion of the yarn guide tube into rotation of the lever via a connecting column, ensuring reliable contact between the trigger plate and the travel switch. When the trigger plate contacts the travel switch, the travel switch sends a stop command to the warp knitting machine controller via a signal line, immediately halting the machine. A buffer spring absorbs the minute displacement of the yarn guide tube caused by yarn vibration during normal threading, preventing the trigger plate from accidentally contacting the travel switch. This ensures both stable machine operation and timely response to thread breakage detection, effectively balancing production efficiency and equipment safety.

[0019] 2. This warp knitting machine's yarn guide device with automatic stop due to thread breakage features a trigger block made of conductive metal inserted into a specific socket when the guide tube rises due to a thread breakage. This trigger block, via a conductive spring, activates a branch circuit corresponding to the LED light, creating a visual marker that precisely corresponds to the physical position of the guide tube. This improves fault location accuracy and shortens repair time. Manually resetting the guide tube automatically turns off the indicator light, creating a closed loop of "thread breakage detection - fault location - repair and reset." BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a yarn guide device for a warp knitting machine that stops automatically when the thread breaks. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of a yarn guide device for a warp knitting machine that stops automatically when the thread breaks. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of a yarn guide device for a warp knitting machine that stops automatically when the thread breaks. Figure 3 ;

[0023] Figure 4 This is a schematic diagram of the partially disassembled structure of a yarn guide device of a warp knitting machine with automatic stop function when the thread breaks according to the present invention;

[0024] Figure 5 This is a schematic diagram of the partial three-dimensional structure of a yarn guide device for a warp knitting machine with automatic stop when the thread breaks. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the partial three-dimensional structure of a yarn guide device for a warp knitting machine with automatic stop when the thread breaks. Figure 2 .

[0026] In the figure: 1. Mounting seat; 2. Base frame; 3. Yarn guide tube; 31. Connecting column; 4. Automatic stop assembly; 41. Mounting slot; 42. Column; 43. Lever; 44. Counterweight; 45. Trigger plate; 46. First support plate; 47. Travel switch; 48. Ring plate; 49. Buffer spring; 5. Wire break marker assembly; 51. Guide slot; 52. First spring; 53. Trigger block; 54. Second support plate; 55. Parallel frame; 56. LED light; 57. Connecting hole. DETAILED DESCRIPTION

[0027] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Example 1: Please refer to Figures 1-6 The utility model provides a technical solution: a yarn guiding device of a warp knitting machine with automatic stop when the thread breaks, comprising a mounting seat 1, a base frame 2 is provided in the mounting seat 1, a yarn guide tube 3 for guiding yarn is movably provided outside the base frame 2, a connecting column 31 is fixed to the bottom end of the yarn guide tube 3, and the connecting column 31 is slidably set in the base frame 2.

[0029] An automatic stop assembly 4 is provided outside the yarn guide tube 3 to stop the warp knitting machine from guiding the yarn when the yarn is broken. The automatic stop assembly 4 includes a lever 43 provided at the top of the base frame 2. One end of the lever 43 is fixedly connected to the yarn guide tube 3, and the other end of the lever 43 is equipped with a trigger plate 45.

[0030] A first support plate 46 is provided on the outer side of the bottom frame 2 , and a travel switch 47 is provided on the top of the first support plate 46 . The travel switch 47 is electrically connected to the warp knitting machine controller through a signal line.

[0031] When the yarn guide tube 3 is displaced due to a yarn break, the lever 43 rotates about its fulcrum, causing the trigger plate 45 to contact the contacts of the travel switch 47. The travel switch 47 then shuts down the warp knitting machine through the control system. The mechanical transmission of the lever 43 converts the displacement of the yarn guide tube 3 into an electrical signal that triggers the machine to shut down. This achieves real-time linkage between yarn breakage detection and equipment protection, preventing equipment damage caused by yarn entanglement.

[0032] Furthermore, a mounting slot 41 is formed at the top of the chassis 2, into which a column 42 is fixed, and a lever 43 is rotatably connected to the top of the column 42. The embedded design of the mounting slot 41 and the column 42 ensures the stability of the rotation fulcrum of the lever 43, reduces the interference of mechanical vibration on the detection accuracy, and prolongs the service life of the equipment.

[0033] Furthermore, a counterweight 44 is provided at one end of the lever 43 away from the yarn guide tube 3, and a trigger plate 45 is fixedly connected to the bottom end of the counterweight 44. The counterweight 44 enhances the rotational sensitivity of the lever 43 through the action of gravity, so that the trigger plate 45 can quickly contact the travel switch 47 when the yarn breaks, thereby shortening the shutdown response time.

[0034] Furthermore, the outer wall of the column 42 is provided with an annular plate 48, to which a buffer spring 49 is fixed. The side of the buffer spring 49, facing away from the annular plate 48, is fixedly connected to a pre-set connecting ring on the side wall of the counterweight 44 by hooking. The buffer spring 49 and the annular plate 48 form a vibration suppression system that absorbs minor deflections of the lever 43 caused by normal yarn vibration, preventing inadvertent shutdowns and improving the device's anti-interference capabilities.

[0035] Example 2: Please refer to Figure 3-Figure 4 In combination with Example 1, it is further understood that a wire breakage marking assembly 5 is provided in the chassis 2 to mark the location of a wire breakage. This assembly includes a second support plate 54 fixed to the top of the chassis 2. A parallel bracket 55 is fixed to the top of the second support plate 54 via insulating bolts. The parallel bracket 55 is a copper conductive bracket, and multiple LED lights 56 are connected in parallel to the top of the parallel bracket 55 via wires. The circuit design of the parallel bracket 55 and the LED lights 56 electrically marks the location of the wire breakage, providing operators with visual fault location and shortening maintenance downtime.

[0036] Furthermore, the bottom end of the parallel frame 55 is provided with a plurality of plug holes 57 corresponding to the LED lights 56, and the inner wall of the plug holes 57 is provided with conductive springs. A trigger block 53 made of conductive metal is fixed to the top of the yarn guide tube 3, and the trigger block 53 is connected in series with the power circuit of the warp knitting machine via a wire.

[0037] When trigger block 53 moves upward with yarn guide tube 3 and engages with socket 57, the corresponding branch circuit closes, energizing LED 56 to illuminate. The mechanical-electrical coupling between trigger block 53 and socket 57 converts the displacement of yarn guide tube 3 into a precise circuit signal, achieving a one-to-one correspondence between the wire break location and LED 56, improving fault diagnosis efficiency.

[0038] Furthermore, a guide slot 51 is defined in the base frame 2, with the connecting post 31 slidably connected thereto. A first spring 52 is disposed within the guide slot 51, with the top end of the first spring 52 fixedly connected to the bottom end of the connecting post 31, and the bottom end of the first spring 52 fixedly connected to the bottom of the guide slot 51. The guide slot 51 and the first spring 52 form a vertical guide and reset system, which not only ensures the linearity of the yarn guide tube 3's movement but also utilizes the potential energy of the first spring 52 to automatically reset the yarn after a break, thus optimizing the operating process.

[0039] In the normal yarn guiding state of this warp knitting machine with automatic stop function upon thread breakage, the yarn guide tube 3 is held in a stable position by the yarn tension, and the connecting post 31 compresses the first spring 52 along the guide groove 51, compressing it. At this time, the lever 43 forms a moment balance due to the pressure on the yarn guide tube 3. The buffer spring 49 on the side of the counterweight 44 is connected to the column 42 via the annular plate 48, absorbing the slight displacement of the yarn guide tube 3 caused by the yarn vibration and maintaining the distance between the trigger plate 45 and the travel switch 47.

[0040] When the yarn breaks, yarn guide tube 3 loses its tension, releasing the compressed elastic potential energy of first spring 52, pushing connecting post 31 upward along guide slot 51 and simultaneously raising yarn guide tube 3. This movement triggers lever 43 to rotate: the fulcrum end, previously subjected to pressure from yarn guide tube 3, rises, and gravity deflects the counterweight 44 downward, causing trigger plate 45, fixed to the bottom of counterweight 44, to rapidly approach limit switch 47. When trigger plate 45 contacts the contacts of limit switch 47, the limit switch 47 sends a stop command to the warp knitting machine controller via a signal line, immediately halting the machine.

[0041] During the rising process of the yarn guide tube 3, the trigger block 53 fixed on its top moves upward synchronously. When the trigger block 53 is inserted into the socket 57 at the bottom end of the parallel frame 55, the conductive spring on the inner wall of the socket 57 forms an electrical connection with the trigger block 53, so that the originally disconnected branch circuit is turned on. Since the parallel frame 55 is fixed to the base frame 2 through the second support plate 54, and each branch circuit independently corresponds to an LED light 56, after the trigger block 53 is inserted into the socket 57 at a specific position, the corresponding LED light 56 ​​is powered on and illuminated, forming a visual mark that accurately corresponds to the position of the broken wire. The operator can quickly locate the broken wire point by observing the position of the illuminated LED light 56. After completing the inspection, the yarn guide tube 3 is manually reset to disengage the trigger block 53 from the socket 57, the LED light 56 ​​goes out, and the device returns to standby mode.

[0042] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A yarn guide device for a warp knitting machine capable of automatically stopping upon thread breakage, comprising a mounting seat (1), a base frame (2) being provided in the mounting seat (1), a yarn guide tube (3) for guiding yarn being movably provided outside the base frame (2), and characterized in that: A connecting column (31) is fixed to the bottom end of the yarn guide tube (3), and the connecting column (31) is slidably arranged in the base frame (2); an automatic stop assembly (4) is arranged outside the yarn guide tube (3) for stopping the warp knitting machine from guiding yarn when the yarn is broken, and the automatic stop assembly (4) includes a lever (43) arranged at the top end of the base frame (2), one end of the lever (43) is movably connected to the yarn guide tube (3), and the other end of the lever (43) is equipped with a trigger plate (45); a first support plate (46) is arranged on the outside of the base frame (2), and a travel switch (47) is arranged at the top end of the first support plate (46), and the travel switch (47) is electrically connected to the warp knitting machine controller through a signal line; when the yarn guide tube (3) is affected by the broken yarn and is displaced, the lever (43) rotates around its fulcrum, and the trigger plate (45) can contact the contact of the travel switch (47), and the travel switch (47) stops the warp knitting machine through the control system.

2. The yarn guide device for a warp knitting machine with automatic stop upon thread breakage according to claim 1, characterized in that: A mounting groove (41) is provided at the top of the base frame (2), a column (42) is fixed in the mounting groove (41), and the lever (43) is rotatably connected to the top of the column (42); a counterweight (44) is provided at one end of the lever (43) away from the yarn guide tube (3).

3. The yarn guide device for a warp knitting machine with automatic stop upon thread breakage according to claim 2, characterized in that: The trigger plate (45) is fixedly connected to the bottom end of the counterweight (44).

4. The yarn guide device for a warp knitting machine with automatic stop upon thread breakage according to claim 2, characterized in that: An annular plate (48) is provided on the outer wall of the column (42), and a buffer spring (49) is fixed outside the annular plate (48); the buffer spring (49) is fixedly connected to a connection ring preset on the side wall of the counterweight (44) by hooking on a side away from the annular plate (48).

5. The yarn guide device for a warp knitting machine with automatic stop upon thread breakage according to claim 1, characterized in that: The base frame (2) is provided with a broken wire marking assembly (5) for marking a broken wire location. The broken wire marking assembly (5) comprises a second support plate (54) fixed to the top of the base frame (2). The top of the second support plate (54) is fixed with a parallel frame (55) via an insulating bolt. The parallel frame (55) is a copper conductive frame. The top of the parallel frame (55) is connected in parallel with a plurality of LED lights (56) via a wire. The bottom of the parallel frame (55) is provided with a plurality of plug holes (57) corresponding to the LED lights (56). The inner walls of the plug holes (57) are provided with conductive springs. The top of the yarn guide tube (3) is fixed with a trigger block (53) made of a conductive metal material. The trigger block (53) is connected in series with a power supply circuit of the warp knitting machine via a wire. When the trigger block (53) moves upward along with the yarn guide tube (3) and plugs into the plug hole (57), the corresponding branch circuit is closed and the LED lights (56) are energized and illuminated.

6. The yarn guide device for a warp knitting machine with automatic stop upon thread breakage according to claim 5, characterized in that: A guide groove (51) is provided in the base frame (2), and the connecting column (31) is slidably connected to the guide groove (51); a first spring (52) is provided in the guide groove (51), the top end of the first spring (52) is fixedly connected to the bottom end of the connecting column (31), and the bottom end of the first spring (52) is fixedly connected to the bottom of the guide groove (51).

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