Broken yarn searching device

Abstract

The utility model provides a broken yarn searching device, which relates to the technical field of textile equipment and comprises a mounting seat, the mounting seat is mounted on a support where a yarn feeding nozzle of a circular knitting machine is located, a first servo motor is mounted at the bottom of the mounting seat and connected with a second arm through a first arm, and the second arm is connected with a third arm through a fourth arm. And a yarn searching mechanism is mounted on the second arm. According to the utility model, machine vision identification and yarn searching are carried out on broken yarns between the yarn feeding nozzle and the knitting needle, and the broken yarns can be quickly placed on the knitting needle again, so that the shutdown inspection time when the yarns between the yarn feeding nozzle and the knitting needle are broken is shortened, and the time consumed by maintenance and finishing is saved.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment technology, and in particular to a yarn breaking and yarn finding device. Background Technology

[0002] Yarn breakage detection is a key automated technology for handling yarn breakage in textile production. It is mainly used in equipment such as knitting machines and ring spinning machines. Its core objective is to quickly locate and capture the upper and lower ends of the broken yarn after it breaks, providing a basis for subsequent automatic splicing or manual processing.

[0003] In existing technology, most yarn breaks in circular knitting machines occur between the yarn feeder and the knitting needle. However, since the yarn breakage detection of current circular knitting machines does not specifically check the location of the yarn breakage, the machine must be stopped and inspected and repaired by staff every time a yarn breakage occurs, which is very time-consuming and has defects. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies. Given that when a yarn breakage occurs between the yarn feeder and the knitting needle, the yarn experiences relatively low tension, and the machine automatically stops upon yarn breakage, the broken yarn will not directly detach from the yarn feeder. This invention provides a yarn breakage locating device that uses machine vision to identify and locate broken yarns between the yarn feeder and the knitting needle. This device can quickly reposition the broken yarn onto the knitting needle, reducing downtime for inspection when a yarn breakage occurs between the yarn feeder and the knitting needle, and saving time spent on maintenance and repair.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a yarn breakage finding device, including a mounting base, the mounting base being installed on the support of the yarn feeding nozzle of a circular knitting machine, a servo motor being installed at the bottom of the mounting base, the servo motor being connected to a second arm through a first arm, and a yarn finding mechanism being installed on the second arm.

[0006] The yarn-finding mechanism includes a shaft connector three, on which a connecting seat is fixedly welded. A camera is embedded inside the connecting seat. A fixing rod is fixedly installed on the side of the connecting seat away from the shaft connector three. A perforated annular tube is fixedly installed on the end of the fixing rod away from the connecting seat. The perforated annular tube is connected to a tee pipe. The air inlet of the tee pipe is connected to the air outlet of a miniature air pump. The miniature air pump is fixedly installed on a connecting frame. The connecting frame and the connecting seat are fixedly welded together. A telescopic rod is fixedly installed on the side of the connecting frame away from the miniature air pump. A rubber end cap is installed on the end of the telescopic rod away from the connecting frame.

[0007] In a preferred embodiment, the first arm includes a shaft connector one, which is fixedly connected to the output shaft of a servo motor one. The shaft connector one is disposed on one end of the arm frame one, and a servo motor two is embedded inside the end of the arm frame one away from the shaft connector one.

[0008] In a preferred embodiment, the second arm includes a shaft connector two, which is fixedly connected to the output shaft of the servo motor two. The shaft connector two is disposed on one end of the arm frame two, and a servo motor three is embedded inside the end of the arm frame two away from the shaft connector two. The output shaft of the servo motor three is fixedly connected to the shaft connector three.

[0009] In a preferred embodiment, the axis of the rubber end cap, the axis of the telescopic rod, and the axis of the perforated annular tube are on the same straight line, and the inner diameter of the perforated annular tube is smaller than the maximum diameter of the rubber end cap.

[0010] In a preferred embodiment, the lens of the camera is positioned directly opposite the perforated annular tube.

[0011] In a preferred embodiment, the camera and the perforated annular tube are positioned directly opposite the yarn feeder and needles of the circular knitting machine.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] This invention, through its design mounted on the yarn feeder frame, enables the identification of broken yarn at the yarn feeder. The design utilizes a first and second arm to adjust the position and orientation of the yarn-finding mechanism, achieving a one-to-one yarn-finding effect. Furthermore, a perforated annular tube employs negative air pressure to adsorb broken yarn, and a rubber end cap further reinforces the clamping and fixing of the broken yarn. This allows for rapid fixation and removal of broken yarn. This invention performs machine vision identification and yarn-finding for broken yarn between the yarn feeder and the knitting needle, quickly repositioning the broken yarn onto the knitting needle, reducing downtime for inspection when yarn breaks occur between the yarn feeder and the knitting needle, and saving time spent on maintenance and repair. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a yarn breaking and finding device provided by this utility model.

[0015] Figure 2 A schematic diagram of the first arm structure of a yarn breaking and finding device provided by this utility model.

[0016] Figure 3 This is a schematic diagram of the No. 2 arm structure of a yarn breaking and finding device provided by this utility model.

[0017] Figure 4This is a schematic diagram of the yarn-finding mechanism of a yarn-breaking yarn-finding device provided by this utility model.

[0018] Figure 5 A schematic diagram of the negative pressure adsorption structure of a yarn breakage finding device provided by this utility model.

[0019] Legend:

[0020] 1. Mounting base; 2. Servo motor one; 3. Arm 1; 4. Arm 2; 5. Yarn finding mechanism;

[0021] 31. Shaft connector one; 32. Arm frame one; 33. Servo motor two;

[0022] 41. Shaft joint two; 42. Arm frame two; 43. Servo motor three;

[0023] 51. Shaft connector three; 52. Connecting seat; 53. Camera; 54. Connecting frame; 55. Fixing rod; 56. Perforated annular tube; 57. Rubber end cap; 58. Telescopic rod; 59. T-shaped pipe; 510. Miniature air pump. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a technical solution: a yarn breakage finding device, including a mounting base 1, which is installed on the support of the yarn feeding nozzle of a circular knitting machine. A servo motor 2 is installed at the bottom of the mounting base 1. The servo motor 2 is connected to a second arm 4 through a first arm 3. A yarn finding mechanism 5 is installed on the second arm 4.

[0026] Among them, the first arm 3 includes a shaft connector 31, which is fixedly connected to the output shaft of the servo motor 2. The shaft connector 31 is located on one end of the arm frame 32, and the servo motor 2 33 is embedded in the end of the arm frame 32 away from the shaft connector 31.

[0027] Furthermore, the second arm 4 includes a shaft connector 2 41, which is fixedly connected to the output shaft of the servo motor 2 33. The shaft connector 2 41 is located on one end of the arm frame 2 42, and the servo motor 3 43 is embedded inside the end of the arm frame 2 42 away from the shaft connector 2 41.

[0028] In this embodiment, since the shaft connector 31 is fixedly installed on the servo motor 2, when the servo motor 2 rotates, it will drive the first arm 3 to rotate as a whole. Furthermore, the servo motor 33 is connected to the shaft connector 41, so the rotation of the servo motor 2 and the servo motor 33 can adjust the position of the servo motor 43. This design allows the present invention to adjust the position of the yarn finding mechanism 5 over a wide range, which is convenient for the yarn finding mechanism 5 to find and clamp yarn breaks. Example

[0029] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the yarn-finding mechanism 5 includes a shaft connector 3 51, which is fixedly connected to the output shaft of the servo motor 3 43. A connecting seat 52 is fixedly welded to the shaft connector 3 51. A camera 53 is embedded inside the connecting seat 52. A fixing rod 55 is fixedly installed on the side of the connecting seat 52 away from the shaft connector 3 51. A perforated annular tube 56 is fixedly installed on the end of the fixing rod 55 away from the connecting seat 52. The perforated annular tube 56 is connected to a three-way tube 59. The air inlet of the three-way tube 59 is connected to the air outlet of the micro air pump 510. The micro air pump 510 is fixedly installed on the connecting frame 54. The connecting frame 54 is fixedly welded to the connecting seat 52. A telescopic rod 58 is fixedly installed on the side of the connecting frame 54 away from the micro air pump 510. A rubber end cap 57 is installed on the end of the telescopic rod 58 away from the connecting frame 54.

[0030] Among them, the axis of the rubber end cap 57, the axis of the telescopic rod 58 and the axis of the perforated annular tube 56 are on the same straight line, and the inner diameter of the perforated annular tube 56 is smaller than the maximum diameter of the rubber end cap 57.

[0031] Furthermore, the lens of camera 53 is positioned directly facing the perforated annular tube 56, and camera 53 and perforated annular tube 56 are positioned directly facing the yarn feeder and knitting needles of the circular knitting machine.

[0032] In this embodiment, since the shaft connector 3 51 is connected to the servo motor 3 43, when the servo motor 3 43 rotates, the orientation of the shaft connector 3 51 and the yarn finding mechanism 5 as a whole can be adjusted. Combined with the rotation of the servo motor 1 2 and the servo motor 2 33, the position and orientation of the first arm 3 and the second arm 4 are adjusted, so that the yarn finding mechanism 5 can perform yarn finding operation on the yarn break from multiple angles.

[0033] Furthermore, during the yarn finding process, the camera 53 first captures images of the space between the yarn feeder and the knitting needle. The location of the yarn break is determined through image recognition. Then, servo motors 1-2, servo motor 2-33, and servo motor 3-43 are activated to adjust the orientation and position of the yarn finding mechanism 5, bringing the perforated annular tube 56 closer to the yarn break. When the perforated annular tube 56 approaches the yarn break, the micro air pump 510 is activated. The air discharged from the outlet of the micro air pump 510 creates a negative pressure in the section connecting the three-way pipe 59 and the perforated annular tube 56, allowing air to be drawn in through the air inlet of the perforated annular tube 56. Due to the lightweight nature of the yarn, the air drawn in through the perforated annular tube 56 can attract the yarn. Then, the telescopic rod 58 is activated, pushing the rubber end cap 57 and squeezing it against the inside of the perforated annular tube 56. This allows the rubber end cap 57 to squeeze and fix the yarn onto the perforated annular tube 56, thus completing the yarn finding operation.

[0034] Working principle:

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, when using this utility model, the mounting base 1 is installed on the support where the yarn feeder is located, and then the rotation of servo motor 1 2, servo motor 2 33 and servo motor 3 43 and the image recognition function of the perforated annular tube 56 are adjusted in the control system according to the size of the large circular knitting machine.

[0036] When a yarn breakage occurs, the system first determines whether the yarn between the yarn feeder and the knitting needle is broken based on the image transmitted by the perforated annular tube 56. When it is determined that the yarn between the yarn feeder and the knitting needle is broken, the control system adjusts the position and orientation of the yarn finding mechanism 5 through servo motor 1 2, servo motor 2 33 and servo motor 3 43, so that the perforated annular tube 56 is close to the broken yarn end. Then, the micro air pump 510 is turned on, which allows the three-way tube 59 to generate negative air pressure in the perforated annular tube 56 connected by Bernoulli's principle, thereby adsorbing the broken yarn. Then, the telescopic rod 58 is turned on to push the rubber end cap 57 into the perforated annular tube 56 to clamp the broken yarn and complete the yarn finding operation.

[0037] In addition, after clamping the broken yarn, the yarn can be pulled out by controlling servo motor 12, servo motor 23 and servo motor 343, which facilitates manual handling.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A method for finding yarn when it is broken. The device is characterized in that, Includes a mounting base (1), which is mounted on the support where the yarn feeder of the circular knitting machine is located. A servo motor (2) is mounted on the bottom of the mounting base (1). The servo motor (2) is connected to a second arm (4) via a first arm (3). A yarn finding mechanism (5) is mounted on the second arm (4). The yarn-finding mechanism (5) includes a shaft connector three (51), a connecting seat (52) is fixedly welded on the shaft connector three (51), a camera (53) is embedded inside the connecting seat (52), a fixing rod (55) is fixedly installed on the side of the connecting seat (52) away from the shaft connector three (51), a perforated annular tube (56) is fixedly installed on the end of the fixing rod (55) away from the connecting seat (52), the perforated annular tube (56) is connected to a three-way tube (59), the air inlet of the three-way tube (59) is connected to the air outlet of the micro air pump (510), the micro air pump (510) is fixedly installed on the connecting frame (54), the connecting frame (54) is fixedly welded to the connecting seat (52), a telescopic rod (58) is fixedly installed on the side of the connecting frame (54) away from the micro air pump (510), and a rubber end cap (57) is installed on the end of the telescopic rod (58) away from the connecting frame (54).

2. The yarn breakage finding device according to claim 1, characterized in that: The first arm (3) includes a shaft connector (31), which is fixedly connected to the output shaft of the servo motor (2). The shaft connector (31) is located on one end of the arm frame (32), and the servo motor (33) is embedded in the end of the arm frame (32) away from the shaft connector (31).

3. The yarn breakage finding device according to claim 2, characterized in that: The second arm (4) includes a shaft connector two (41), which is fixedly connected to the output shaft of the servo motor two (33). The shaft connector two (41) is located on one end of the arm frame two (42). The servo motor three (43) is embedded inside the end of the arm frame two (42) away from the shaft connector two (41). The output shaft of the servo motor three (43) is fixedly connected to the shaft connector three (51).

4. The yarn breakage finding device according to claim 1, characterized in that: The axis of the rubber end cap (57), the axis of the telescopic rod (58), and the axis of the perforated annular tube (56) are on the same straight line, and the inner diameter of the perforated annular tube (56) is smaller than the maximum diameter of the rubber end cap (57).

5. A yarn breakage finding device according to claim 1, characterized in that: The lens of the camera (53) is positioned directly opposite the perforated annular tube (56).

6. The yarn breakage finding device according to claim 1, characterized in that: The camera (53) and the perforated annular tube (56) are positioned directly opposite the yarn feeder and needles of the circular knitting machine.

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