Automatic yarn feeding and bundling machine and yarn feeding control method based on electrical signals

Abstract

The present invention discloses an automatic yarn feeding bundling machine and a yarn feeding control method based on electrical signals, the automatic yarn feeding bundling machine comprising a yarn feeder, a driving yarn feed wheel, a driven yarn feed wheel, a yarn feed motor, a processor, and a yarn reel for feeding a bundling yarn, the yarn feed motor being controlled by the processor to drive and rotate the driving yarn feed wheel, at least one of the driving yarn feed wheel and the driven yarn feed wheel and the yarn feeder having conductive parts, the automatic yarn feeding bundling machine also comprising a yarn feed control circuit having a first input terminal, a second input terminal, and a first output terminal, the first output terminal being connected to the processor, and a short circuit between the first input terminal and the second input terminal triggering the first output terminal to output a first electrical signal, the conductive part of the yarn feeder being connected to the first input terminal, and the conductive part of either the driving yarn feed wheel or the driven yarn feed wheel being connected to the second input terminal. The present invention can realize automatic yarn feeding based on electrical signals, improving the yarn feeding efficiency and safety of the bundling machine.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic binding machines, and particularly relates to an automatic yarn feeding binding machine based on electrical signals and a yarn feeding control method.

Background Art

[0002] A binding machine is a device for winding, fixing and tightening an object to be bound by bending a binding yarn. As described in Patent Document 1, the binding machine comprises structures such as a bending forming part (i.e., a rounding mechanism), a twisting unit (i.e., a yarn winding assembly) and the like.

[0003] Conventional binding machines require the binding thread to be manually fed into a thread feed inlet between two interlocking thread feed rings, and the movement of the thread feed rings then transports the binding thread to a thread guide mechanism, which guides the binding thread into the binding mechanism to complete the binding operation. In automatic binding machines, the two thread feed rings are tightly interlocked, making it very difficult to manually transport the binding thread directly through the thread feed rings to the thread guide mechanism. Therefore, one solution is to hold the binding thread by hand and feed its end until it touches the lower middle of two gears, and then, by pressing the trigger of the binding machine, the electrical control system inside the binding machine drives and rotates the drive gear to feed the binding thread, thereby achieving thread tightening. However, in this solution, the rotation speed of the drive gear is relatively fast under normal operating conditions, which can easily injure the operator's hand due to the high-speed feeding of the binding thread, and the amount of feed cannot be controlled, which can easily lead to waste of the first bound thread due to overfeeding or failure of the first bound thread due to underfeeding. Other solutions, such as those described in patent CN201680043004.5, involve a drive gear, which may be a tension roller, being installed as a driven wheel, allowing the tension roller to be pushed open with a desired pressure at a close distance from the drive gear, and the two thread feed wheels to be separated by manually operating the mechanical structure, thereby facilitating the user to feed the binding thread to the thread guide mechanism through the passage formed after the thread feed wheels have been separated. However, such solutions have the drawback of being complicated to operate, as the operator must hold the thread with one hand to apply pressure while simultaneously holding the thread with the other. Furthermore, manual thread feeding methods are inefficient, have poor control of the feed amount, and tend to lead to waste of consumables. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Chinese Patent Application Publication No. 111706084 [Overview of the project] [Problems that the invention aims to solve]

[0005] The technical problem that this invention aims to solve is to provide an automatic yarn feeding bundling machine and yarn feeding control method based on electrical signals that can realize automatic yarn feeding and improve the yarn feeding efficiency and safety of the bundling machine. [Means for solving the problem]

[0006] To solve the above technical problems, a first aspect of the present invention discloses an automatic yarn feeding and binding machine based on electrical signals, the automatic yarn feeding and binding machine comprising a yarn feeding port, a main yarn feeding wheel, a driven yarn feeding wheel, a yarn feeding motor, a yarn guide mechanism and a processor, and a yarn reel for supplying binding yarn, wherein the yarn feeding motor is controlled by the processor to drive and rotate the main yarn feeding wheel, At least one of the main yarn feed ring and the driven yarn feed ring, and the yarn feeding port have conductive parts. The automatic yarn feeding and bundling machine is provided with a yarn feeding control circuit, the yarn feeding control circuit includes a first input terminal, a second input terminal and a first output terminal, the first output terminal is connected to the processor, and a short circuit between the first input terminal and the second input terminal triggers the first output terminal to output a first electrical signal. The conductive part of the thread feeding port is connected to the first input terminal. A conductive part of either the main thread feed ring or the driven thread feed ring is connected to the second input terminal.

[0007] In a selectable embodiment, in a first aspect of the present invention, the thread feed control circuit further includes a third input terminal and a second output terminal, the second output terminal being connected to the processor, and a short circuit between the second input terminal and the third input terminal triggers the second output terminal to output a second electrical signal. The thread guide mechanism has a conductive part, and the conductive part is connected to the third input terminal.

[0008] As an optional embodiment, in a first aspect of the present invention, in the thread feed control circuit, one of the three terminals of the first input terminal, the second input terminal, and the third input terminal is connected to the first electrode, and the remaining two terminals are connected to the second electrode, and the polarities of the first electrode and the second electrode are opposite.

[0009] As an optional embodiment, in a first aspect of the present invention, the first electrical signal and / or the second electrical signal are represented in a TTL level-skip manner.

[0010] As a selectable embodiment, in a first aspect of the present invention, the automatic thread feeding and binding machine further comprises a switch, a thread reel cover, and a thread feeding and binding switching circuit. The thread feeding and bundling switching circuit includes a fourth input terminal, a fifth input terminal, and a third output terminal, the third output terminal being connected to the processor, and a short circuit between the fourth input terminal and the fifth input terminal triggers the third output terminal to output a third electrical signal. The opening and closing of the thread reel cover triggers the on / off of the switch, and both ends of the switch are connected to the fourth input terminal and the fifth input terminal, respectively.

[0011] As an optional embodiment, in the first aspect of the present invention, the binding thread stroke distance between the conductive part of either the main thread feed ring or the driven thread feed ring and the conductive part of the thread feeding port is set to 2 to 15 mm, and / or The binding thread stroke distance between the conductive part of either the main thread feed ring or the driven thread feed ring and the conductive part of the thread guide mechanism is set to 2 to 10 mm.

[0012] A second aspect of the present invention discloses a yarn feeding control method, the method being applied to the automatic yarn feeding and binding machine described above, and the method is When the first electrical signal is received, the processor drives the main thread feed wheel to rotate it at a predetermined rotational speed for a predetermined number of turns, thereby advancing the bound thread that has come into contact with the gears between the main thread feed wheel and the driven thread feed wheel by a predetermined amount in the direction of the thread guide mechanism.

[0013] As an optional embodiment, in a second aspect of the present invention, the method is The processor further includes controlling the main thread feed wheel to stop the advancement of the binding thread when it receives the second electrical signal.

[0014] As an optional embodiment, in a second aspect of the present invention, the predetermined rotational speed is set so as not to injure the hand when advancing the binding thread.

[0015] As an optional embodiment, in a second aspect of the present invention, the method is When the third electrical signal is received, when the first electrical signal is received, the processor drives the main thread feed wheel and performs the operation of rotating it for a predetermined number of turns at a predetermined rotational speed, The further includes that if the third electrical signal is not received, the processor does not receive the first electrical signal. [Effects of the Invention]

[0016] Compared to the prior art, the embodiments of the present invention have the following beneficial effects.

[0017] In an embodiment of the present invention, the binding yarn short-circuits the conductive part between the yarn feeder and the yarn feeding wheel, thereby triggering the control circuit to output an electrical signal, and the processor controls the active yarn feeding wheel to perform yarn feeding according to the electrical signal. The embodiment can automatically detect whether the position of the binding yarn reaches the yarn feeder, and automatically start the yarn feeding operation when the binding yarn reaches the position. Therefore, the accuracy and efficiency of determining whether the binding yarn is at the yarn feeding start position can be improved, automatic yarn feeding is realized, and the yarn feeding efficiency and safety of the binding machine can be improved compared with the case of directly feeding yarn manually or opening the yarn feeding wheel by pressing a key and then feeding yarn manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the description of the embodiments are briefly described below. Obviously, the drawings described below are only examples of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. [Figure 1] Figure 1 is a schematic structural diagram of an automatic yarn feeding binding machine disclosed in an embodiment of the present invention. [Figure 2] Figure 2 is a schematic structural diagram of a yarn feeding control circuit disclosed in an embodiment of the present invention. [Figure 3] Figure 3 is a schematic structural diagram of an automatic yarn feeding binding machine in a state where a yarn reel cover is opened, which is disclosed in an embodiment of the present invention. [Figure 4] Figure 4 is a schematic structural diagram of a yarn feeding and binding switching circuit disclosed in an embodiment of the present invention. [Figure 5] Figure 5 is a schematic structural diagram of another automatic yarn feeding binding machine disclosed in an embodiment of the present invention. [Figure 6] Figure 6 is a schematic flowchart of a yarn feeding control method disclosed in an embodiment of the present invention. [Figure 7] Figure 7 is a schematic structural diagram of a yarn feeder disclosed in an embodiment of the present invention. [Figure 8] Figure 8 is a schematic cross-sectional view of a yarn feeder disclosed in an embodiment of the present invention. [Figure 9] Figure 9 is a schematic diagram of the structure of the thread guide mechanism disclosed in an embodiment of the present invention. [Figure 10] Figure 10 is a schematic cross-sectional view of a thread guide mechanism disclosed in an embodiment of the present invention. [Modes for carrying out the invention]

[0019] To enable those skilled in the art to better understand the solutions of the present invention, the technical methods of embodiments of the present invention will be clearly and completely described below with reference to the drawings of embodiments of the present invention, and it is clear that the embodiments described are a part of the embodiments of the present invention, not all of the embodiments. Any other embodiments that those skilled in the art can obtain based on the embodiments of the present invention without requiring inventive work are all within the scope of the protection of the present invention.

[0020] <Example 1> Referring to Figure 1, Figure 1 is a schematic diagram of the structure of an electrical signal-based automatic yarn feeding and binding machine disclosed in an embodiment of the present invention. The automatic yarn feeding and binding machine comprises a yarn guide mechanism 1, a driven yarn feed wheel 2, a main yarn feed wheel 3, a yarn supply port 4, a yarn reel 6 for supplying binding yarn 5, a yarn feed motor 7, and a processor 8, wherein the yarn feed motor 7 is controlled by the processor 8 to drive and rotate the main yarn feed wheel 3, At least one of the main yarn feed wheel 3 and the driven yarn feed wheel 2, and the yarn feeding port 4 have conductive parts. The automatic yarn feeding and bundling machine is provided with a yarn feeding control circuit, the yarn feeding control circuit includes a first input terminal, a second input terminal and a first output terminal, the first output terminal is connected to the processor 8, and a short circuit between the first input terminal and the second input terminal triggers the first output terminal to output a first electrical signal. The conductive part of the thread feeding port 4 is connected to the first input terminal. A conductive part of either the main thread feed wheel 3 or the driven thread feed wheel 2 is connected to the second input terminal.

[0021] In an embodiment of the present invention, as shown in Figure 1, the thread feed motor 7 is electrically connected to the processor 8, the output terminal of the thread feed motor 7 is a gear that meshes with the main thread feed wheel 3, and the thread feed motor 7 rotates the main thread feed wheel 3 by driving the gear.

[0022] In this embodiment of the present invention, the binding thread short-circuits the conductive part between the thread feed port and the thread feed wheel, triggering the control circuit to output an electrical signal. The processor then controls the main thread feed wheel to feed the thread based on this electrical signal. This allows for automatic detection of whether the binding thread has reached the thread feed port, and if it has, the thread feeding operation is automatically initiated. Therefore, the accuracy and efficiency of determining whether the binding thread is in the thread feeding start position can be improved, and automatic thread feeding is achieved. This improves the thread feeding efficiency and safety of the binding machine compared to manually feeding the thread directly or manually feeding the thread after opening the thread feed wheel by pressing a key.

[0023] In an optional embodiment, the thread feed control circuit further includes a third input terminal and a second output terminal, the second output terminal being connected to the processor 8, and a short circuit between the second input terminal and the third input terminal triggers the second output terminal to output a second electrical signal. The thread guide mechanism 1 has a conductive part, and the conductive part is connected to the third input terminal.

[0024] In the selectable embodiment, when the second electrical signal is received, the processor 8 controls the main thread feed wheel 3 to stop the binding thread 5 from moving forward.

[0025] The selectable embodiment causes the binding thread to reach the thread guide mechanism, thereby short-circuiting the conductive part between the thread guide mechanism and the thread feed port, triggering the control circuit to output an electrical signal, and causing the processor to stop thread feeding by the main thread feed wheel based on the electrical signal, thereby enabling it to determine whether the binding thread will reach the thread guide mechanism, improving the accuracy and efficiency of determining whether the binding thread will reach the thread guide mechanism, which helps to further complete the automatic thread feeding process and improve the automatic thread feeding efficiency.

[0026] In other selectable embodiments, the thread feed control circuit has one of the three input terminals (first, second, and third) connected to the first electrode, and the other two connected to the second electrode, with the polarities of the first and second electrodes being opposite.

[0027] In the selectable embodiment, for example, in the schematic diagram of the thread feed control circuit shown in Figure 2, 1 is the first input terminal, 2 is the second input terminal, and 3 is the third input terminal in the thread feed control circuit JP1, and the circuit further includes resistors R1, R2, R3, R4, capacitors C1, C2, Zener diode DZ1, Zener diode DZ2, a power supply, and a ground terminal. The first input terminal is connected to the ground terminal and to the first output terminal by capacitor C1, and further to the second output terminal by capacitor C2, the second input terminal is connected to the power supply by resistor R2 and to the first output terminal by resistor R4, and the third input terminal is connected to the power supply by resistor R1 and to the second output terminal by resistor R3.

[0028] In other selectable embodiments, the first electrical signal and / or the second electrical signal are represented using a TTL level-skip scheme.

[0029] In other selectable embodiments, as shown in Figure 3, the automatic thread feeding and binding machine further comprises a switch 9, a thread reel cover 10, and a thread feeding and binding switching circuit. The thread feeding and bundling switching circuit includes a fourth input terminal, a fifth input terminal, and a third output terminal, the third output terminal being connected to the processor 8, and a short circuit between the fourth input terminal and the fifth input terminal triggers the third output terminal to output a third electrical signal. The opening and closing of the thread reel cover 10 triggers the on / off of the switch 9, and both ends of the switch 9 are connected to the fourth input terminal and the fifth input terminal, respectively.

[0030] As an option, the thread feed and bundling switching circuit may include a first resistor, a second resistor, a first capacitor, a power supply, and a ground terminal, wherein the first input terminal is connected to one end of the first resistor, the other end of the first resistor is connected to the power supply and connected to the third output terminal by the second resistor, and the second input terminal is in contact with the ground terminal and connected to the third output terminal by the first capacitor.

[0031] In the selectable embodiment, for example, in the thread feed bundling switching circuit shown in Figure 4, 1 is the fourth input terminal and 2 is the fifth input terminal in the thread feed control circuit JP1, and the circuit further includes a resistor R5, a resistor R6, a capacitor C3, a power supply and a ground terminal, the fourth input terminal is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the power supply and is connected to the third output terminal (hatch-cover) by the resistor R6, and the fifth input terminal is in contact with the ground terminal and is connected to the third output terminal by the capacitor C3. When the fourth input terminal of the circuit is short-circuited to the fifth input terminal, the circuit outputs a third electrical signal, which is used to perform an automatic thread feeding operation when the thread reel cover is opened. This prevents injuries to the hands from being caused by excessively fast thread pulling speed during tying (when the rotation speed of the thread feed wheel is faster than the automatic thread feeding speed during tying). When the thread reel cover is closed, only the tying operation is performed without the automatic thread feeding operation, thereby reducing the chances of triggering thread feeding due to poor contact between the tied thread and the thread feed wheel or thread guide mechanism.

[0032] The selectable embodiment triggers the on / off state of a switch by opening and closing the thread reel cover, and controls the short-circuit state of the two input terminals of the thread feeding and bundling switching circuit by the on / off state of the switch, thereby outputting an electrical signal for control, which can reduce the risk of injuring one's hands and accidentally triggering thread feeding.

[0033] In other selectable embodiments, the switch 9 is a key switch or a pressure sensor switch, and the switch 9 is provided in a location other than the thread reel cover 10 or the thread reel cover of the binding machine, and the trigger end of the switch 9 is pressed down by covering it with the thread reel cover 10.

[0034] The selectable embodiment triggers the on / off of a switch by opening and closing the thread reel cover, which in turn helps to output an electrical signal for control by switching the switch on and off.

[0035] In another optional embodiment, as shown in Figure 3, the thread reel cover 10 is a foldable cover, the cover includes a locking member 101, the locking member 101 is detached from the hinged connection 102 of the thread reel cover, the hinged connection 102 of the thread reel cover is hinged to a location other than the thread reel cover of the binding machine, and the switch 9 is adjacent to the locking member 101.

[0036] In this selectable embodiment, the switch is installed adjacent to the locking member, and since the locking member is separated from the hinge connection, the force applied to the locking member area when the user closes the thread reel cover is greater than in other areas, thus reducing the likelihood of poor switch contact and further improving the accuracy of the subsequent electrical signal output.

[0037] In other selectable embodiments, the switch 9 is a transmissive photoelectric switch, comprising a light emitter and a light receiver, wherein the light emitter is installed on the thread reel cover surface or at a location other than the thread reel cover of the binding machine, and the light receiver is installed in a position that can be aligned with the light emitter when the thread reel cover surface is closed, or The switch 9 is installed as a first contact fitted into the thread reel cover and a second contact fitted into the binding machine. When the thread reel cover is closed, the first contact contacts the second contact, the first contact is electrically connected to the first input terminal, and the second contact is electrically connected to the second input terminal.

[0038] In other selectable embodiments, the third electrical signal is represented using a TTL level-skip scheme.

[0039] In other selectable embodiments, the binding thread stroke distance between the conductive part of either the main thread feeder 3 or the driven thread feeder 2 and the conductive part of the thread feeding port 4 is set to 2 to 15 mm, and / or The binding thread stroke distance between the conductive part of either the main thread feed ring 3 or the driven thread feed ring 2 and the conductive part of the thread guide mechanism 1 is set to 2 to 10 mm.

[0040] In common sense, if the diameter of the conductor does not change, the longer the conductor, the greater the resistance of the conductor. The selectable embodiment helps to limit the binding thread stroke distance to a reasonable and relatively small range, thereby limiting the resistance of the binding thread during a short circuit to a relatively small resistance range, reducing the occurrence of situations where the resistance is too high to achieve a short circuit, and thereby improving the stability of achieving a short circuit with the binding thread.

[0041] In other selectable embodiments, as shown in Figure 1, the bundling machine further comprises a rounding mechanism 11 (including loop forming plates 111 and guides 112), a winding assembly 12, a winding motor 13 that drives and rotates the winding assembly 12, and a PCB board 14 that controls the operation of the winding motor 13, wherein the rounding mechanism 11, the winding assembly 12 and the winding motor 13 are located on the same axis. The PCB board 14 is positioned along a direction parallel to the axis and located below the spindle motor 13, the PCB board 14 has an extended portion which extends to the rear end of the spindle motor 13, the PCB board 14 includes a communication member, a positioning member and a control member, the control member is installed on the board surface of the PCB board 14 facing the spindle motor 13, and the communication member and the positioning member are installed on the back surface of the extended portion which faces away from the spindle motor 13.

[0042] In this selectable embodiment, the PCB board is placed below the motor. When the motor operates, hot air is generated around it, and as this hot air naturally rises, the conduction of hot air generated by the motor to the PCB board can be reduced. Furthermore, by placing the communication components and positioning components on the back surface of the PCB board, the hot air can be further isolated, and the impact of electromagnetic interference on the components can be reduced by moving them away from the motor's radiation.

[0043] As an option, the communication component may include at least one of the following: a WIFI component, a 4G component, an RF component, and a Bluetooth® component, and the positioning component may include at least one of the following: a GPS component, a Beidou component, a Galileo component, and a GLONASS component.

[0044] In another optional embodiment, as shown in Figure 1, the bundling machine further comprises a moisture- and dust-proof case 15, and the PCB substrate 14 is housed inside the case 15.

[0045] In another selectable embodiment, as shown in Figure 5, the binding machine further comprises an antenna 16, wherein a cavity is formed between the rear end of the winding motor 13 and the inner wall of the binding machine casing, the antenna 16 is installed on the inner wall of the casing corresponding to the cavity, and the lead wire of the communication member is connected to the antenna 16.

[0046] The selectable embodiment mounts the antenna on the inner wall of the casing corresponding to an empty cavity, away from the winding motor, thereby reducing electromagnetic interference from the motor and improving the communication quality of the antenna.

[0047] In other selectable embodiments, the surface of the PCB substrate 14 facing the winding motor 13 is covered with a sealant.

[0048] In the selectable embodiment, the sealant is a liquid adhesive that solidifies after being left for a predetermined period of time, thereby preventing damping and dust accumulation. Optionally, the sealant may also be a material with thermal conductivity.

[0049] In another selectable embodiment, a grounding layer is provided on the back surface of the PCB substrate 14 facing away from the winding motor 13, and the grounding layer is copper-plated.

[0050] The selectable embodiment can achieve the function of isolating direct electromagnetic field radiation by copper plating the PCB substrate and grounding it.

[0051] As an alternative, as shown in Figure 5, a locking groove 17 is installed inside the casing of the bundling machine, and the case of the PCB substrate 14 is removably fitted into the locking groove 17.

[0052] Referring to Figure 6, Figure 6 is a schematic flowchart of the yarn feeding control method disclosed in an embodiment of the present invention, and the yarn feeding control method is When the first electrical signal is received, the processor drives the main thread feed wheel to rotate it at a predetermined rotational speed for a predetermined number of turns, thereby advancing the bundled thread that has come into contact with the gears between the main thread feed wheel and the driven thread feed wheel by a predetermined amount in the direction of the thread guide mechanism, as described in S101.

[0053] In the embodiment of the present invention, the predetermined rotational speed is set so as not to injure the hands when advancing the binding thread.

[0054] In this embodiment of the present invention, the accuracy and efficiency of determining the thread feeding start timing can be improved by determining the reception of a first electrical signal as a thread feeding start signal. The amount of thread fed is controlled by triggering the processor to control the drive wheel so that it rotates for a set number of turns based on the electrical signal. This improves the thread feeding efficiency and accuracy of the binding machine compared to the manual thread feeding method of the prior art. Furthermore, by setting a predetermined rotation speed that does not injure the hands, the situation in conventional binding machines where the rotation speed of the drive wheel is too fast and could cause hand injury can be reduced.

[0055] In a selectable embodiment, the method is Upon receiving the second electrical signal, the processor may further control the main thread feed wheel to stop the binding thread from moving forward.

[0056] The selectable embodiment can improve the accuracy and efficiency of determining the timing for stopping the advancement of the binding thread by determining that the receipt of the second electrical signal is a signal to stop the advancement of the binding thread.

[0057] In other selectable embodiments, the method is When the third electrical signal is received, when the first electrical signal is received, the processor drives the main thread feed wheel and performs the operation of rotating it for a predetermined number of turns at a predetermined rotational speed, The further details may include that if the third electrical signal is not received, the processor does not receive the first electrical signal.

[0058] The selectable embodiment determines that receiving a third electrical signal is a prerequisite for entering the automatic thread feeding program, and does not perform the automatic thread feeding operation if the third electrical signal is not received, thereby reducing the risk of hand injury (the user may accidentally pull the trigger when opening the thread reel cover, and the high speed of the thread feeding makes it easy to injure the user's hand if their hand is near the thread due to the high speed movement of the thread) and the triggering of the thread feeding due to poor contact of the thread, thereby improving the safety of the threading machine.

[0059] <Example 2> This embodiment is based on Embodiment 1, but modifies the automatic yarn feeding and tying machine in Embodiment 1 from one based on electrical signals to one based on optical signals. The automatic yarn feeding and tying machine according to this embodiment also includes a yarn guide mechanism 1, a driven yarn feeding wheel 2, a main yarn feeding wheel 3, a yarn supply port 4, a yarn reel 6 for supplying tying yarn 5, a yarn feeding motor 7, and a processor 8, wherein the yarn feeding motor 7 is controlled by the processor 8 to drive and rotate the main yarn feeding wheel 3, A first photosensitive member is installed in the internal passage of the thread feeding port 4, the output terminal of the first photosensitive member is electrically connected to the processor 8, and a first signal is output to the processor 8 by detecting a change in light caused by the binding thread 5 passing through the thread feeding port 4.

[0060] In this embodiment of the present invention, a trigger signal is determined when the binding thread passes through the thread feed opening by installing a photosensitive member, and the processor controls the main thread feed wheel to feed the thread according to this signal. This allows for automatic detection of whether the binding thread has reached the thread feed opening, and if it has reached it, the thread feeding operation is automatically started. Therefore, the accuracy and efficiency of determining whether the binding thread is in the thread feeding start position can be improved, and automatic thread feeding is realized. This improves the thread feeding efficiency and safety of the binding machine compared to manually feeding the thread directly or manually feeding the thread after opening the thread feed wheel by pressing a key.

[0061] In selectable embodiments, the first photosensitive member is a groove-type photoelectric sensor or a transmissive photoelectric sensor in which a light emitter and a light receiver are erected on both sides of the internal passage of the thread feed opening, or, The first photosensitive member is a reflector-type photoelectric switch, wherein the light emitter and light receiver of the reflector-type photoelectric switch are provided on the same side of the internal passage of the thread feed opening, and the reflector is provided at a position opposite to the light emitter and light receiver in the internal passage of the thread feed opening, or The first photosensitive member is a diffuse reflection type photoelectric switch, or The first photosensitive member is a brightness sensor, and the photosensitive side of the brightness sensor faces the internal passage of the yarn feed port, and outputs the first signal based on the brightness change caused by the binding yarn passing through the yarn feed port.

[0062] In other selectable embodiments, the inside of the yarn feed port is hollow, and the inside of the yarn feed port forms an internal passage that penetrates from top to bottom, the horizontal cross-sectional area of ​​the internal passage of the yarn feed port gradually decreases from bottom to top, and the first photosensitive member is installed at the top of the internal passage of the yarn feed port.

[0063] For example, if the thread feeding port is shown in Figure 7, and Figure 8 is a cross-sectional view of the thread feeding port, and the first photosensitive member is installed at the top of the thread feeding port, and the first photosensitive member is a transmissive photoelectric sensor, then 18 in Figure 8 is the light emitter and 19 is the light receiver.

[0064] The binding thread enters from the bottom of the internal passage of the thread feed opening, and as the internal space of the thread feed opening narrows as it approaches the top, the binding thread is fixed in place up to the top of the thread feed opening. In this selectable embodiment, the accuracy of determining the thread feeding start timing can be further improved by installing the first photosensitive member at the top of the thread feed opening.

[0065] In other selectable embodiments, the thread feed opening is located adjacent to the edge of the thread reel cover, and the nearest distance between the thread feed opening and the edge is 1 to 5 cm.

[0066] As can be seen from Figure 3, the closer an object is to the edge of the thread reel cover, the greater the illuminance it receives. In this selectable embodiment, the thread feed opening is located adjacent to the edge of the thread reel cover. When the thread reel cover is opened, the change in light caused by the binding thread passing through the area where the photosensitive member is located becomes even greater, which helps to improve the accuracy and efficiency of determining whether the binding thread is in the target position.

[0067] In other selectable embodiments, the automatic thread feeding and tying machine further comprises a thread guiding mechanism, A second photosensitive member is installed in the internal passage of the thread guide mechanism, the output terminal of the second photosensitive member is connected to the processor, and a second signal is output to the processor by detecting a change in light caused by the binding thread passing through the thread guide mechanism.

[0068] In the selectable embodiment, when the second signal is received, the processor 8 controls the main thread feed wheel 3 to stop the binding thread 5 from moving forward.

[0069] The selectable embodiment determines a trigger signal when the binding thread enters the thread guide mechanism by installing a photosensitive member, and the processor stops thread feeding by the main thread feed wheel in response to this signal, thereby automatically detecting whether the binding thread has entered the thread guide mechanism, improving the accuracy and efficiency of determining whether the binding thread has entered the thread guide mechanism, which helps to further complete the automatic thread feeding process and improve the automatic thread feeding efficiency.

[0070] In other selectable embodiments, the thread guide mechanism is a piping structure, and the second photosensitive member is installed at the top or bottom of the internal passage of the thread guide mechanism.

[0071] For example, if the thread guide mechanism is shown in Figure 9, and Figure 10 is a cross-sectional view of the thread guide mechanism, and the second photosensitive member is installed at the bottom of the thread guide mechanism, and the second photosensitive member is a transmissive photoelectric sensor, then in Figure 10, 20 is the light emitter and 21 is the light receiver.

[0072] The selectable embodiment involves placing the photosensitive member of the thread guide mechanism at the bottom, which helps determine the time when the binding thread has just entered the thread guide mechanism as the time to stop thread feeding by the main thread feed wheel, thereby improving the accuracy and efficiency of determining the time to stop thread feeding by the main thread feed wheel.

[0073] The contents disclosed in the embodiments of the present invention merely disclose preferred embodiments of the present invention and are intended to explain the technical proposal of the present invention, not to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that it is still possible to modify the technical proposal described in each of the above embodiments or to substitute some of the technical features therein, but such modifications or substitutions will not cause the essence of the corresponding technical proposal to deviate from the spirit and scope of the technical proposal of each embodiment of the present invention.

Claims

1. An automatic thread feeding and bundling machine based on electrical signals, The automatic yarn feeding and binding machine comprises a yarn feeding port, a driving yarn feeding wheel, a driven yarn feeding wheel, a yarn feeding motor, a yarn guide mechanism, and a processor, as well as a yarn reel for supplying binding yarn, and the yarn feeding motor is controlled by the processor to drive and rotate the driving yarn feeding wheel based on electrical signals, At least one of the main yarn feed ring and the driven yarn feed ring, and the yarn feeding port have conductive parts. The automatic yarn feeding and bundling machine is provided with a yarn feeding control circuit, the yarn feeding control circuit includes a first input terminal, a second input terminal and a first output terminal, the first output terminal is connected to the processor, and a short circuit between the first input terminal and the second input terminal triggers the first output terminal to output a first electrical signal. The conductive part of the thread feeding port is connected to the first input terminal. An automatic yarn feeding and binding machine based on electrical signals, characterized in that a conductive part of either the main yarn feeding wheel or the driven yarn feeding wheel is connected to the second input terminal.

2. The thread feed control circuit further includes a third input terminal and a second output terminal, the second output terminal being connected to the processor, and a short circuit between the second input terminal and the third input terminal triggers the second output terminal to output a second electrical signal. The automatic thread feeding and binding machine according to claim 1, characterized in that the thread guiding mechanism has a conductive part, and the conductive part is connected to the third input terminal.

3. The automatic thread feeding and binding machine according to claim 2, characterized in that, in the thread feeding control circuit, one of the three sides of the first input terminal, the second input terminal and the third input terminal is connected to the first electrode, and the remaining two sides are connected to the second electrode, and the polarities of the first electrode and the second electrode are opposite.

4. The automatic thread feeding and binding machine according to claim 2, characterized in that the first electrical signal and / or the second electrical signal are represented in a TTL level skipping manner.

5. In an automatic thread feeding and binding machine further comprising a switch, a thread reel cover, and a thread feeding and binding switching circuit, The thread feeding and bundling switching circuit includes a fourth input terminal, a fifth input terminal, and a third output terminal, the third output terminal being connected to the processor, and a short circuit between the fourth input terminal and the fifth input terminal triggers the third output terminal to output a third electrical signal. The automatic thread feeding and binding machine according to claim 2, characterized in that the opening and closing of the thread reel cover triggers the on / off of the switch, and both ends of the switch are connected to the fourth input terminal and the fifth input terminal, respectively.

6. The binding thread stroke distance between the conductive part of either the main thread feed ring or the driven thread feed ring and the conductive part of the thread feeding port is set to 2 to 15 mm, and / or The automatic yarn feeding and binding machine according to claim 2, characterized in that the binding thread stroke distance between the conductive part of either the main yarn feeding ring or the driven yarn feeding ring and the conductive part of the yarn guide mechanism is set to 2 to 10 mm.

7. A thread feeding control method, The method described above is applied to the automatic thread feeding and binding machine described in any one of claims 1 to 6, and the method described above is A yarn feeding control method characterized in that, upon receiving the first electrical signal, the processor drives the main yarn feed wheel to rotate it at a predetermined rotational speed for a predetermined number of turns, thereby advancing the bundled yarn that has come into contact with the gears between the main yarn feed wheel and the driven yarn feed wheel by a predetermined amount in the direction of the yarn guide mechanism.

8. A thread feeding control method, The above method is applied to the automatic thread feeding and bundling machine described in claim 2, and the above method is A yarn feeding control method characterized in that, upon receiving the first electrical signal, the processor drives the main yarn feed wheel to rotate it at a predetermined rotational speed for a predetermined number of turns, thereby advancing the bundled yarn that has come into contact with the gears between the main yarn feed wheel and the driven yarn feed wheel by a predetermined amount in the direction of the yarn guide mechanism.

9. A thread feeding control method, The above method is applied to the automatic thread feeding and binding machine described in claim 5, and the above method is A yarn feeding control method characterized in that, upon receiving the first electrical signal, the processor drives the main yarn feed wheel to rotate it at a predetermined rotational speed for a predetermined number of turns, thereby advancing the bundled yarn that has come into contact with the gears between the main yarn feed wheel and the driven yarn feed wheel by a predetermined amount in the direction of the yarn guide mechanism.

10. The aforementioned method, The yarn feeding control method according to claim 8, further comprising the processor controlling the main yarn feed wheel to stop the advance of the binding yarn when it receives the second electrical signal.

11. The thread feeding control method according to claim 7, characterized in that the speed of the predetermined rotation speed is set so as not to injure the hand when advancing the binding thread.

12. The aforementioned method, When the third electrical signal is received, or when the first electrical signal is received, the processor drives the main thread feed wheel and performs an operation to rotate it at a predetermined rotational speed for a predetermined number of turns, The thread feeding control method according to claim 9, further comprising the condition that if the third electrical signal is not received, the processor does not receive the first electrical signal.

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