Closed-loop rope embroidery device and method

Abstract

According to the closed-loop rope embroidery device and method, a third encoder for detecting the swing angle of a swing rod is arranged on the swing rod, and the third encoder can collect the swing angle of the swing rod in real time. In the rope embroidering work, the controller continuously collects angle swing data of the swing rod of the third encoder and serves as a basis for judging the real-time tension of the rope, the rope conveying speed of the first driving motor for rope conveying of the rope conveyor is continuously controlled, the swing rod for tension adjustment swings within an inner reasonable angle range, the tension of the rope is adjusted in a tension controllable mode, and the rope is more stable in rope embroidering. Therefore, when the second driving motor drives the rope beating ring, rope embroidering can be carried out on the basis of benign and controllable rope tension. The third encoder, the controller and the first driving motor form a rope conveying closed-loop system, and the third encoder can quickly collect the swing angle of the swing rod in real time, so that the controller can timely control the rope conveying speed completely through the first driving motor, and the tension of a rope is completely in a normal and controllable state during rope embroidering; and the requirement of high-speed rope embroidery is met.

Description

Technical Field

[0001] The invention relates to a rope embroidery device, in particular to a rope embroidery device and method which can realize high-speed rope embroidery in a closed loop. Background Art

[0002] The cord embroidery device is used to cooperate with an embroidery machine or a sewing mechanism to sew cords onto embroidery cloth to form special patterns.

[0003] The rope embroidery device includes a rope feeder, a rope swing assembly for controlling the tension, and a rope tie ring assembly for feeding the rope. The rope feeder is usually used to feed the rope to the rope tie ring, and the rope tie ring cooperates with the machine needle to sew the rope on the embroidery cloth. The rope swing assembly is used to control and detect the tension of the rope between the rope tie ring and the rope feeder to meet the needs of rope tie ring rope embroidery.

[0004] During specific operation, the pendulum rod of the rope pendulum assembly is provided with a tension spring to properly control the rope tension, and a Hall detection element is provided to detect the swing amplitude of the pendulum, thereby identifying the tension of the conveying rope and providing the control system with real-time information of the rope tension. The control system receives the size of the rope tension information and controls the speed of the rope conveyor conveying the rope. The pendulum rod of the rope pendulum assembly is usually also provided with a multi-angle adjustment structure to facilitate changing the tension adjustment range of the pendulum rod.

[0005] However, as the speed of the embroidery machine continues to increase, it is easy to cause tension adjustment lag. That is, when the rope ring rotates at a high speed and a large angle, the sensitivity of the rope tension adjustment increases, and the detection speed of the Hall detection element will lag behind significantly, unable to keep up with the speed of rope embroidery, and react slowly. As a result, the control system controls the rope feeder to delay the rope feeding, resulting in excessive tension and too tight ropes during rope embroidery. When the rope ring rotates at a high speed and the demand for ropes decreases, the detection speed of the Hall detection element will also lag behind significantly, causing the control system to control the rope feeder to delay the reduction of rope feeding, resulting in too little tension and loose ropes during rope embroidery. If the rope is too tight or loose, the pendulum tension adjustment will fail, which will eventually lead to uncontrollable rope embroidery patterns, and there will be a large gap between the actual rope embroidery effect and the preset effect.

[0006] In addition, the existing driving motors of the rope feeder and rope ring assembly all use open-loop stepper motors. As the embroidery speed increases, the open-loop stepper motor is prone to losing steps, which will also cause imbalance in rope embroidery and rope tension adjustment. All of the above factors will affect the quality of high-speed rope embroidery and limit the increase in embroidery machine speed. Summary of the invention

[0007] The present invention aims to solve the problem that in the use of existing rope embroidery devices, especially during high-speed rope embroidery, the driving motor of the rope swing assembly and the driving motor of the rope feeder are prone to lose step, resulting in loss of control of the rope feeding tension control and the rope feeding of the rope ring. A closed-loop rope embroidery device with relatively controllable tension control is provided, which is particularly suitable for high-speed rope feeding.

[0008] The technical solution of the present invention to solve the existing problems is: a closed-loop rope embroidery device, including a rope feeder, a rope swing assembly, a rope ring assembly, a mounting frame, and a controller. The controller controls a first drive motor of the rope feeder and a second drive motor of the rope swing assembly. The rope swing assembly includes an elastic swing rod that can adjust the rope tension. As an improvement, the rope swing assembly is provided with a third encoder for detecting the swing angle of the swing rod. The controller is connected to collect detection data of the third encoder and controls the first drive motor to retract and release the rope. The third encoder, the controller, and the first drive motor constitute a closed-loop system for rope feeding.

[0009] As a further improvement, the first drive motor is provided with a first encoder connected to the controller; the first drive motor, the first encoder and the controller constitute a closed-loop system; or the first drive motor, the first encoder and the controller on the first drive motor constitute a closed-loop motor; the first encoder is a magnetic encoder or a photoelectric encoder.

[0010] As a further improvement, the second drive motor is provided with a second encoder connected to the controller; the second drive motor, the second encoder and the controller constitute a closed-loop system; or the second drive motor, the second encoder and the controller on the second drive motor constitute a closed-loop motor; the second encoder is a magnetic encoder or a photoelectric encoder.

[0011] As a further improvement, the third encoder is a magnetic encoder or a photoelectric encoder.

[0012] A closed-loop rope embroidery method comprises a rope embroidery device provided with a rope feeder, a rope swing assembly, a rope tying ring assembly and a controller. The controller drives a second drive motor of the rope tying ring assembly to control the rope tying ring to perform rope embroidery. The elastic swing rod of the rope swing assembly elastically swings with the rope tying ring rope embroidery action to adjust the rope tension. As an improvement, a third encoder for detecting the swing angle of the swing rod is provided on the tension-adjusting swing rod. During the rope embroidery work, the controller continuously collects data on the swing angle of the swing rod of the third encoder and uses it as a basis for determining the instantaneous tension of the rope. The controller continuously controls the first drive motor of the rope feeder to feed the rope to feed the rope at a speed, so that the tension-adjusting swing rod swings within a reasonable angle range and the rope tension is controllably adjusted. The third encoder, the controller and the first drive motor constitute a closed-loop rope feeding system.

[0013] As a further improvement, the controller continuously and intermittently collects data on the angle swing of the third encoder pendulum and uses it as a basis for determining the instantaneous tension of the rope, and continuously and intermittently controls the first drive motor of the rope feeder to feed the rope, so that the tension-adjusting pendulum swings within a reasonable angle range and the tension of the rope is controllably adjusted.

[0014] As a further improvement, a corresponding encoder connected to the controller is arranged on the first drive motor and / or the second drive motor, so that the first drive motor and / or the second drive motor constitute a closed-loop motor.

[0015] As a further improvement, the third encoder is a magnetic encoder or a photoelectric encoder.

[0016] As a further improvement, the encoder corresponding to the first drive motor and / or the second drive motor is a magnetic encoder or a photoelectric encoder.

[0017] Compared with the prior art, the present invention is provided with a third encoder for detecting the swing angle of the pendulum rod on the tension adjustment pendulum rod, and the third encoder can collect the swing angle of the pendulum rod in real time. During the rope embroidery work, the controller continuously collects the swing angle data of the third encoder pendulum rod and uses it as the basis for determining the instantaneous tension of the rope, and continuously controls the first driving motor of the rope feeder to feed the rope to feed the rope speed, so that the tension adjustment pendulum rod swings within a reasonable angle range, and the tension can be controlled to adjust the rope tension, so that the second driving motor can perform rope embroidery on the basis of benign and controllable rope tension when driving the rope ring. Its beneficial effect is that the third encoder, the controller, and the first driving motor constitute a closed-loop system for rope feeding, and the third encoder can quickly and real-time collect the swing angle of the pendulum rod, so that the controller can completely control the rope feeding speed in a timely manner through the first driving motor, so that the rope tension is completely in a normal and controllable tension state during rope embroidery, meeting the needs of high-speed rope embroidery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a cord embroidery device of the present invention.

[0019] Figure 2 It is an exploded schematic diagram of the cord embroidery device of the present invention.

[0020] Figure 3 It is an exploded schematic diagram of the cord embroidery device of the present invention from another viewing angle.

[0021] Figure 4 It is a structural block diagram of the control of the cord embroidery device controller of the present invention. DETAILED DESCRIPTION

[0022] See also Figure 1-4In this embodiment, a closed-loop cord embroidery device is provided, comprising a cord conveyor 1, a cord swing assembly 2, a cord tie ring assembly 3, a mounting frame 4, and a controller 5. The cord conveyor 1 is usually mounted on the upper part of the mounting frame 4, the cord tie ring assembly 3 is mounted on the bottom of the mounting frame 4, and the cord swing assembly 2 is mounted on the mounting frame 4, located above the cord tie ring assembly 3. Usually, the controller 5 can control the first drive motor 11 of the cord conveyor 1 and the second drive motor 31 of the cord swing assembly 2. The controller can be separately provided on the cord embroidery device, or the controller of an existing embroidery machine can be used.

[0023] The rope swing assembly 2 includes an elastic swing rod 21 that can adjust the rope tension. The rope swing assembly 2 is provided with a third encoder 22 for detecting the swing angle of the swing rod. The controller 5 is connected to collect the detection data of the third encoder 22 and controls the first drive motor 11 to retract and release the rope. The third encoder 22, the controller 5, and the first drive motor 11 constitute a closed-loop system for conveying rope. Preferably, the third encoder 22 is a magnetic encoder or a photoelectric encoder.

[0024] The swing rod 21 can elastically tighten the conveyed rope through the elastic body formed by the torsion spring, so that the rope always maintains appropriate tension during the rope embroidery process, so that the rope ring of the rope ring assembly 3 can accurately convey the rope with tension to cooperate with the machine needle during the working process, so as to complete the rope embroidery pattern. Since the third encoder 22 is set on the swing rod 21, compared with the detection speed of the existing Hall element, the encoder can fully adapt to the detection of the high-speed swing angle of the swing rod 21 during the high-speed rope embroidery process, thereby quickly identifying the rope tension during the rope embroidery process.

[0025] When the rope-tying ring rotates rapidly at a large angle, the required rope increases rapidly in a short period of time, the rope at the pendulum 21 is pulled rapidly, and the swing angle of the pendulum 21 becomes too large in an instant, that is, the rope tension is too large. The third encoder 22 can quickly detect this information, and the controller 5 collects the information detected by the third encoder 22, and controls the first drive motor 31 of the rope feeder 1 to quickly feed the rope. As the rope feeding speed increases, the tension of the rope is relieved, and the pendulum 21 is controlled to rebound and maintain a balance with the rope tension under the action of the elastic body; when the rope-tying ring rotates rapidly at a large angle, the required rope decreases rapidly in a short period of time, the rope margin at the pendulum 21 increases, and the pendulum 21 swings back at a large angle instantly under the action of the elastic body, that is, the rope tension is too small. The third encoder 22 can quickly detect this information, and the controller 5 collects the information detected by the third encoder 22, and controls the first drive motor 31 of the rope feeder 1 to slow down the rope feeding, or even reverse the rope collection. As the rope feeding speed slows down or the rope is collected, the rope tension is increased, and the swing rod 21 is controlled to rebound under the action of the elastic body to maintain a balance with the rope tension. In this way, the third encoder 22, the controller 5, and the first drive motor 11 form a closed-loop system for rope feeding, which can always keep the rope tension within a preset range during high-speed rope embroidery, so as to facilitate the rope loop to embroider a preset rope embroidery pattern at high speed.

[0026] In order to enable the controller 5 to accurately control the driving of the first drive motor, or the second drive motor, on the basis of the existing drive motor, the first drive motor 11 is provided with a first encoder connected to the controller 5; the first drive motor 11, the first encoder, and the controller 5 constitute a closed-loop system; or the first drive motor 11, the first encoder, and the controller 5 on the first drive motor 11 constitute a closed-loop motor; the first encoder is a magnetic encoder or a photoelectric encoder. The second drive motor 31 is provided with a second encoder connected to the controller 5; the second drive motor 31, the second encoder, and the controller 5 constitute a closed-loop system; or the second drive motor 31, the second encoder, and the controller 5 on the second drive motor 31 constitute a closed-loop motor; the second encoder is a magnetic encoder or a photoelectric encoder.

[0027] A closed-loop rope embroidery method can utilize the above-mentioned closed-loop rope embroidery device, including a rope embroidery device provided with a rope feeder 1, a rope swing assembly 2, a rope tying ring assembly 3, and a controller 5. The controller 5 drives and controls the second drive motor 31 of the rope tying ring assembly 3 to control the rope tying ring to perform rope embroidery. The elastic swing rod 21 of the rope swing assembly 2 elastically swings with the rope tying ring rope embroidery action to adjust the rope tension. A third encoder 22 for detecting the swing angle of the swing rod is provided on the tension-adjusting swing rod. During the rope embroidery work, the controller 5 continuously collects the swing angle data of the swing rod of the third encoder 22 and uses it as a basis for determining the instantaneous tension of the rope. The controller 5 continuously controls the first drive motor 11 of the rope feeder 1 for conveying rope to convey the rope speed, so that the tension-adjusting swing rod swings within a reasonable angle range and the rope tension is controllably adjusted. The third encoder 22, the controller 5, and the first drive motor 11 constitute a closed-loop system for conveying rope.

[0028] As an option, the controller 5 continuously and intermittently collects the data of the angle swing of the pendulum arm of the third encoder 22 and uses it as a basis for determining the instantaneous tension of the rope, and continuously and intermittently controls the first driving motor 11 of the rope conveyor 1 to convey the rope, so that the tension-adjusting pendulum arm swings within a reasonable angle range and the tension of the rope is controllably adjusted.

Claims

1. A closed-loop cord embroidery device, comprising a cord conveyor, a cord swing assembly, a cord ring assembly, a mounting frame, and a controller, wherein the controller controls a first drive motor of the cord conveyor and a second drive motor of the cord swing assembly, and the cord swing assembly comprises an elastic swing rod capable of adjusting cord tension, characterized in that: The rope pendulum assembly is provided with a third encoder for detecting the swing angle of the pendulum rod. The controller is connected to collect the detection data of the third encoder and controls the first drive motor to retract and release the rope. The third encoder, controller and first drive motor constitute a closed-loop system for transmitting the rope.

2. The closed-loop cord embroidery device according to claim 1, characterized in that: The first drive motor is provided with a first encoder connected to the controller; the first drive motor, the first encoder and the controller form a closed-loop system; or The first drive motor, the first encoder and the controller on the first drive motor form a closed-loop motor; the first encoder is a magnetic encoder or a photoelectric encoder.

3. The closed-loop cord embroidery device according to claim 1, characterized in that: The second drive motor is provided with a second encoder connected to the controller; the second drive motor, the second encoder and the controller form a closed-loop system; or The second drive motor, the second encoder and the controller on the second drive motor form a closed-loop motor; the second encoder is a magnetic encoder or a photoelectric encoder.

4. The closed-loop cord embroidery device according to claim 1, characterized in that: The third encoder is a magnetic encoder or a photoelectric encoder.

5. A closed-loop cord embroidery method, comprising a cord embroidery device provided with a cord conveyor, a cord swing assembly, a cord tying ring assembly, and a controller, wherein the controller drives a second drive motor of the cord tying ring assembly to control the cord tying ring to perform cord embroidery, and an elastic swing rod of the cord swing assembly elastically swings with the cord tying ring to perform cord embroidery to adjust the cord tension, characterized in that: A third encoder for detecting the swing angle of the pendulum is provided on the tension-adjusting pendulum. During rope embroidery work, the controller continuously collects data on the swing angle of the pendulum from the third encoder and uses it as a basis for determining the instantaneous tension of the rope, and continuously controls the first driving motor of the rope feeder to feed the rope at a speed, so that the tension-adjusting pendulum can swing within a reasonable angle range and the tension of the rope can be controlled. The third encoder, the controller and the first driving motor constitute a closed-loop system for rope feeding.

6. The closed-loop cord embroidery method according to claim 5, characterized in that: The controller continuously and intermittently collects the data of the angle swing of the third encoder pendulum and uses it as a basis for determining the instantaneous tension of the rope. It continuously and intermittently controls the first driving motor of the rope feeder to feed the rope, so that the tension-adjusting pendulum swings within a reasonable angle range and the tension of the rope is controllably adjusted.

7. The closed-loop cord embroidery method according to claim 5, characterized in that: A corresponding encoder connected to the controller is arranged on the first drive motor or / and the second drive motor, so that the first drive motor or / and the second drive motor form a closed-loop motor.

8. The closed-loop cord embroidery method according to claim 5, characterized in that: The third encoder is a magnetic encoder or a photoelectric encoder.

9. The closed-loop cord embroidery method according to claim 7, characterized in that: The encoder corresponding to the first drive motor and / or the second drive motor is a magnetic encoder or a photoelectric encoder.

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