Yarn guiding device of weft knitting machine

Abstract

The utility model relates to the field of textile equipment, and discloses a yarn guiding device of a weft knitting machine, including a yarn tube frame, a tension monitor, a transmission roller and a driving assembly. The yarn tube frame is fixedly installed above the loom of the weft knitting machine, the transmission roller is movably installed on one side of the yarn tube frame, and the tension monitor is electrically connected to the driving assembly. In the process of conveying yarn to the loom, the transmission roller pulls and tensions the yarn, and a tension sensor is arranged on the transmission roller. The tension sensor feeds back the tension received by the transmission roller to the tension monitor, which can observe the tension change in real time, and then controls the driving assembly to drive the transmission roller to move, and uses the change of the transmission position to automatically adjust the compensation tension, so that the yarn can maintain stable tension during the weft knitting process. The present application has the effect of solving the problem of yarn relaxation.

Description

Technical Field

[0001] The utility model relates to the field of textile equipment, in particular to a yarn guiding device of a weft knitting machine. Background Art

[0002] A weft knitting machine is a loom used to produce weft knitted fabrics. The yarn is fed into the working needles of the knitting machine along the weft direction, and the loops are knitted in a certain order and interlaced to form a fabric. Among them, the yarn guide device is an important part of the normal operation of the weft knitting machine.

[0003] The existing yarn guiding device can refer to the Chinese patent document with the announcement number CN213170873U. The above patent document discloses a yarn guiding device, including a fixed frame installed on the guide rail of the loom, and a plurality of yarn tubes are rotatably arranged on the fixed frame. A wire rack is correspondingly provided above the hook of the loom. By passing each roll of yarn through the wire ring on the wire rack and then cooperating with the hook, tension is generated in the yarn, and at the same time, it also prevents the yarn from being entangled.

[0004] However, as the yarn is consumed, the yarn tube gradually becomes thinner, and the yarn becomes loose, which makes the fabric stitches uneven, thus affecting the quality of the finished fabric. Utility Model Content

[0005] In order to solve the problem of yarn relaxation in the later stage, the present application provides a yarn guiding device of a weft knitting machine.

[0006] The present application provides a yarn guiding device for a weft knitting machine, which adopts the following technical solution:

[0007] A yarn guiding device of a weft knitting machine is used to convey yarn to a loom, comprising a yarn tube frame and a tension monitor, wherein the yarn tube frame is movably connected to a transmission roller, the transmission roller is used to pull and tension the yarn, a driving assembly is provided between the transmission roller and the yarn tube frame, the driving assembly is used to drive the transmission roller to move, a tension sensor is connected between the tension monitor and the transmission roller, and the driving assembly is electrically connected to the tension sensor.

[0008] By adopting the above technical solution, a transmission roller is set on one side of the yarn tube frame to pull and tension the yarn, and the tension sensor feeds back the tension exerted on the transmission roller to the tension monitor, so as to observe the tension change in real time; the drive component is also electrically connected to the tension sensor, and a tension limit is set. When the tension is less than the limit, the tension sensor can control the drive component to drive the transmission roller to move, and use the change in the transmission position to automatically adjust the compensation tension, so that the yarn can maintain stable tension during the weft knitting process, so as to avoid the problem of yarn relaxation affecting the quality of the fabric.

[0009] Furthermore, the yarn tube rack is adjacently arranged just above the loom, and comprises a frame body and a plurality of yarn tubes, wherein the yarn tubes are arranged at intervals along the length direction of the frame body, and the top of the yarn tube is detachably connected to the frame body.

[0010] By adopting the above technical solution, the yarn tube racks are arranged adjacent to each other just above the loom, which can shorten the yarn path and avoid the entanglement of multiple strands of yarn as much as possible; the detachable connection facilitates the replacement of the yarn tube.

[0011] Furthermore, an electromagnet is embedded in the frame, and the yarn tube includes a connecting seat and a yarn rod. The yarn rod is vertically installed on the connecting seat, and the yarn rod is used to wind the yarn. One end of the connecting seat facing the frame is a magnetic attraction part, and the electromagnet is attracted and fixed to the magnetic attraction part.

[0012] By adopting the above technical solution, electromagnets and magnetic suction parts are respectively arranged on the frame and the yarn bobbin, and the electromagnetic force is used for suction and fixation. By controlling the on and off of the circuit, the fixing strength can be met and the yarn bobbin can be easily taken out and replaced.

[0013] Furthermore, a positioning groove is provided on the frame corresponding to the position where the yarn drum is installed, the electromagnet is installed on the bottom wall of the positioning groove, and the positioning groove is matched with the connecting seat in a concave-convex manner.

[0014] By adopting the above technical solution, a positioning groove that can cooperate with the concave and convex part of the connecting seat is arranged on the outer periphery of the electromagnet, so as to facilitate the accurate and rapid installation of the yarn bobbin, shorten the replacement time as much as possible, and improve efficiency.

[0015] Furthermore, the yarn stick is conical in shape, with the tip facing downward.

[0016] By adopting the above technical solution, the conical yarn stick with the tip facing downward can make the yarn unwinding smoother under the action of gravity.

[0017] Furthermore, the yarn rod is pivotally connected to the connecting seat.

[0018] By adopting the above technical solution, the pivotal connection between the yarn rod and the connecting seat further improves the smoothness of yarn unwinding, reduces the resistance as much as possible, and avoids thread breakage.

[0019] Furthermore, a lifting ear is protruding from both ends of the yarn tube frame, and the driving assembly includes a rotating shaft, a rocker arm and a servo motor. The rotating shaft is rotatably connected between the two lifting ears, the transmission roller is parallel to the rotating shaft and has the same length, the two rocker arms are fixedly connected between the rotating shaft and the transmission roller, the output end of the servo motor is coaxially fixed with the rotating shaft, the servo motor is fixedly installed at one end of the yarn tube frame, and the tension sensor is electrically connected to the servo motor.

[0020] By adopting the above technical solution, the driving assembly consisting of the rotating shaft, rocker arm and servo motor can make the transmission roller move in a circular motion relative to the yarn frame under the automatic control of the tension sensor, thereby changing the position of the transmission roller, adjusting the tension of the yarn conduction in real time, and compensating for the tension loss of the yarn in time.

[0021] Furthermore, a lubricating layer is provided on the outer peripheral wall of the transmission roller, and the lubricating layer is used to apply lubricant to the yarn.

[0022] By adopting the above technical solution and setting a lubricating layer to abut the yarn, the yarn can reduce floating hairs, make the yarn surface smoother, and reduce friction, thereby making it easier for the loom to weave and avoid thread breakage.

[0023] Furthermore, the surface of the lubricating layer is coated with a solid lubricating paste.

[0024] By adopting the above technical solution, the solid lubricating paste is convenient for daily storage and is consumed slowly.

[0025] Furthermore, the lubricating layer is made of sponge material, and the surface of the lubricating layer is infiltrated with liquid lubricant.

[0026] By adopting the above technical solution, the soft and porous sponge material can reduce the volatilization and drying speed of the liquid lubricant after being soaked in the liquid lubricant, thereby improving the durability of the lubricating layer.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By setting a transmission roller to pull and tension the yarn, the tension sensor feeds back the tension of the transmission roller to the tension monitor, which can observe the tension change in real time, and then control the drive assembly to drive the transmission roller to move, and use the change of the transmission position to automatically adjust the compensation tension, so that the yarn can maintain a stable tension during the weft knitting process, so as to avoid the problem of yarn relaxation affecting the quality of the fabric;

[0029] 2. The yarn bobbin and the frame are fixed by the magnetic attraction of the electromagnet, and a positioning groove matching the concave and convex of the yarn bobbin is arranged around the outer periphery of the electromagnet, so that the yarn bobbin can be installed accurately and quickly, and the replacement time of the yarn bobbin can be shortened as much as possible, thereby improving efficiency;

[0030] 3. By setting a lubricating layer on the outer wall of the transmission roller, the yarn rubs against the lubricating layer during the conduction process, which plays a role in hair removal and smoothness, reduces friction to avoid thread breakage, makes it easier for the loom to weave, and helps to ensure the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a yarn guiding device of a weft knitting machine according to an embodiment of the present application.

[0032] Figure 2 It is a schematic diagram of the yarn tube frame structure.

[0033] Figure 3 yes Figure 2 A partial enlarged view of area A in the middle.

[0034] Figure 4 It is a schematic diagram of the drive component structure.

[0035] Description of reference numerals:

[0036] 10. Loom; 1. Yarn tube rack; 11. Frame; 111. Electromagnet; 112. Positioning slot; 113. Pick-up ear; 12. Yarn tube; 121. Connecting seat; 1211. Magnetic suction part; 122. Yarn rod; 2. Tension monitor; 3. Transmission roller; 31. Lubricating layer; 4. Driving assembly; 41. Rotating shaft; 42. Rocker arm; 43. Servo motor. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 The technical solution of this application is described clearly and completely.

[0038] The embodiment of the present application discloses a yarn guiding device of a weft knitting machine.

[0039] Reference Figure 1 A yarn guide device of a weft knitting machine includes a yarn creel frame 1, a tension monitor 2, a transmission roller 3 and a driving assembly 4. The yarn creel frame 1 is fixedly installed above a loom 10 of the weft knitting machine, the transmission roller 3 is movably installed on one side of the yarn creel frame 1, and the tension monitor 2 is electrically connected to the driving assembly 4.

[0040] In the process of conveying yarn to the loom 10, the transmission roller 3 pulls and tensions the yarn. A tension sensor is arranged on the transmission roller 3. The tension sensor feeds back the tension of the transmission roller 3 to the tension monitor 2, which can observe the tension change in real time, and then control the drive component 4 to drive the transmission roller 3 to move. The change of the transmission position is used to automatically adjust the compensation tension, so that the yarn can maintain stable tension during the weft knitting process, thereby solving the problem of yarn relaxation affecting the quality of the fabric.

[0041] Reference Figure 1 The tension monitor 2 is located on one side of the loom 10 and is connected to the transmission roller 3 through a tension sensor. The tension monitor 2 is provided with a screen for displaying the tension value and an operation panel. The user can set the limit of the tension sensor through the operation panel so that the yarn tension can be kept within a normal range during the yarn guiding process. When the yarn is loose due to insufficient yarn surplus and the real-time tension is lower than the limit, the tension sensor controls the drive assembly 4 to start, driving the guide roller to move, further pressing the yarn, thereby achieving tension compensation.

[0042] Reference Figure 1, Figure 2 , the yarn tube rack 1 is adjacently arranged just above the loom 10 to shorten the yarn path and avoid the entanglement of multiple yarns as much as possible. The yarn tube rack 1 includes a frame 11 and a plurality of yarn tubes 12. The frame 11 is parallel to the loom 10, and the plurality of yarn tubes 12 are arranged at intervals along the length direction of the frame 11, so as to facilitate the mixed weaving of yarns of different colors or thicknesses. The top of the yarn tube 12 is detachably connected to the frame 11, and the bottom end of the yarn tube 12 is a free end, which facilitates smooth yarn output. Removably connecting each yarn tube 12 to the frame 11 can facilitate the individual replacement of the yarn tube 12 without removing the entire frame 11. In the present embodiment, there are four yarn tubes 12. The yarn tube 12 and the frame 11 are preferably connected in a magnetically fixed manner.

[0043] Reference Figure 2 , Figure 3 , an electromagnet 111 is embedded in the connection part between the frame 11 and the yarn drum 12, and the yarn drum 12 includes a connection seat 121 and a yarn rod 122. The connection seat 121 is cylindrical, and the end surface facing the frame 11 is a magnetic attraction portion 1211. The electromagnet 111 is energized to generate a magnetic force to make the connection seat 121 and the frame 11 attract and fix. By controlling the on and off of the circuit, it can not only meet the fixing strength, but also facilitate the removal and replacement of the yarn drum 12. It is worth noting that each electromagnet 111 corresponding to the yarn drum 12 is controlled by a double-loop circuit, which can be independently controlled on and off, and can also be synchronously on and off with all yarn drums 12. The yarn rod 122 for winding the yarn is conical, and the tip is facing downward, which makes the unwinding of the yarn smoother under the action of gravity. The yarn rod 122 is coaxially and vertically installed in the center of the connection seat 121, and is pivotally connected to the connection seat 121, which further improves the smoothness of the yarn unwinding and minimizes the resistance to avoid breaking. In order to replace the yarn bobbin 12 more quickly and accurately, a positioning groove 112 is opened on the outer periphery of the electromagnet 111. The positioning groove 112 and the connecting seat 121 are matched in a concave-convex manner, which can also prevent the yarn bobbin 12 from being displaced and affecting the fabric quality.

[0044] Reference Figure 4 , both ends of the frame 11 of the bobbin frame 1 are laterally protruded with a lug 113. The driving assembly 4 includes a rotating shaft 41, a rocker arm 42 and a servo motor 43. The rotating shaft 41 is rotatably connected between the two lugs 113, the transmission roller 3 is parallel to the rotating shaft 41 and has the same length, the two rocker arms 42 are fixedly connected between the rotating shaft 41 and the transmission roller 3, the servo motor 43 is fixedly installed at one end of the bobbin frame 1, the output end of the servo motor 43 is coaxially fixed with the rotating shaft 41, and the tension sensor is electrically connected to the servo motor 43. Under the automatic control of the tension sensor, the servo motor 43 drives the transmission roller 3 to make a circular motion relative to the bobbin frame 1 with the rotating shaft 41 as the center, thereby changing the position of the transmission roller 3, adjusting the tension of the yarn conduction in real time, and compensating for the tension loss of the yarn in time.

[0045] Reference Figure 4 The outer peripheral wall of the transmission roller 3 is also wrapped with a lubricating layer 31, and the surface of the lubricating layer 31 is wrapped with solid lubricating paste such as beeswax and pressed powder. The lubricating layer 31 abuts against the yarn, which can remove the floating hair on the surface of the yarn and make the yarn smoother, thereby reducing friction during crocheting to avoid thread breakage. The solid lubricating paste is slow to consume due to its wear resistance, and is more convenient for daily storage and transportation. In other embodiments, the lubricating layer 31 can also be a sponge material soaked in a liquid lubricant. The soft and porous sponge can reduce the volatilization and drying speed of the liquid lubricant and improve the durability of the lubricating layer 31.

[0046] The above are all preferred embodiments of the present application. Obviously, the embodiments described above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made by ordinary technicians in this field based on the structure, shape, and principle of the present application without making any creative work should be covered within the protection scope of the present application.

Claims

1. A yarn guide device for a weft knitting machine, used for conveying yarn to a loom (10), characterized in that: The invention comprises a yarn tube frame (1) and a tension monitor (2), wherein the yarn tube frame (1) is movably connected with a transmission roller (3), the transmission roller (3) is used for pulling and tensioning the yarn, a driving component (4) is provided between the transmission roller (3) and the yarn tube frame (1), the driving component (4) is used for driving the transmission roller (3) to move, a tension sensor is connected between the tension monitor (2) and the transmission roller (3), and the driving component (4) is electrically connected to the tension sensor.

2. The yarn guiding device of the weft knitting machine according to claim 1, characterized in that: The yarn tube frame (1) is arranged adjacent to and directly above the loom (10), and comprises a frame body (11) and a plurality of yarn tubes (12). The yarn tubes (12) are arranged at intervals along the length direction of the frame body (11), and the tops of the yarn tubes (12) are detachably connected to the frame body (11).

3. The yarn guiding device of the weft knitting machine according to claim 2, characterized in that: An electromagnet (111) is embedded on the frame (11); the yarn drum (12) comprises a connecting seat (121) and a yarn rod (122); the yarn rod (122) is vertically mounted on the connecting seat (121); the yarn rod (122) is used for winding yarn; one end of the connecting seat (121) facing the frame (11) is a magnetic attraction portion (1211); the electromagnet (111) and the magnetic attraction portion (1211) are attracted and fixed.

4. The yarn guiding device of the weft knitting machine according to claim 3, characterized in that: A positioning groove (112) is provided on the frame (11) at a position corresponding to the installation position of the yarn bobbin (12); the electromagnet (111) is installed on the bottom wall of the positioning groove (112); the positioning groove (112) and the connecting seat (121) are matched in a concave-convex manner.

5. The yarn guiding device of the weft knitting machine according to claim 3, characterized in that: The yarn stick (122) is conical in shape, with the tip facing downward.

6. The yarn guiding device of the weft knitting machine according to claim 3, characterized in that: The yarn rod (122) is pivotally connected to the connecting seat (121).

7. The yarn guiding device of the weft knitting machine according to claim 1, characterized in that: A lifting ear (113) is protruding from both ends of the yarn tube frame (1), and the driving component (4) comprises a rotating shaft (41), a rocker arm (42) and a servo motor (43); the rotating shaft (41) is rotatably connected between the two lifting ears (113); the transmission roller (3) is parallel to the rotating shaft (41) and has the same length; the two rocker arms (42) are fixedly connected between the rotating shaft (41) and the transmission roller (3); the output end of the servo motor (43) is coaxially fixed with the rotating shaft (41); the servo motor (43) is fixedly installed at one end of the yarn tube frame (1); and the tension sensor is electrically connected to the servo motor (43).

8. The yarn guiding device of the weft knitting machine according to claim 1, characterized in that: The outer peripheral wall of the transmission roller (3) is provided with a lubricating layer (31), and the lubricating layer (31) is used to apply lubricant to the yarn.

9. The yarn guiding device of the weft knitting machine according to claim 8, characterized in that: The surface of the lubricating layer (31) is coated with a solid lubricating paste.

10. The yarn guiding device of the weft knitting machine according to claim 8, characterized in that: The lubricating layer (31) is made of sponge material, and the surface of the lubricating layer (31) is infiltrated with liquid lubricant.

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