Automatic yarn feed bundling machine and yarn feed 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 more particularly to an automatic yarn feed binding machine and a yarn feed control method based on an electric signal. [Background technology]

[0002] A binding machine is a device for wrapping, securing, and tightening an object to be bound by bending binding thread, and as described in Patent Document 1, the binding machine is equipped with structures such as a bending forming section (i.e., a rolling mechanism) and a twisting unit (i.e., a thread winding assembly).

[0003]

[0003] Binding machines currently on the market require the operator to manually feed the binding yarn into a yarn feed opening between two meshed yarn feed wheels, which then transports the binding yarn to the yarn guide mechanism via the movement of the yarn feed wheels, which then guides the binding yarn into the binding mechanism to complete the binding operation. Because the two yarn feed wheels of an automatic binding machine are tightly meshed, it is extremely difficult to manually feed the binding yarn directly through the yarn feed wheels to the yarn guide mechanism. Therefore, one solution involves manually holding the binding yarn and feeding its end until it abuts the lower, middle part of the two gears. Then, by pressing the trigger of the binding machine, the electrical control system within the binding machine drives the main gear to rotate and feed the binding yarn, thereby achieving yarn tightening. However, because the rotation speed of the main gear is relatively fast under normal operating conditions, this solution can easily injure the operator's hands due to the fast feeding of the binding yarn. Furthermore, because the amount of feeding cannot be controlled, it is likely to result in excessive feeding, resulting in wasting the first-time binding yarn, or insufficient feeding, resulting in an unsuccessful first binding. Another solution, such as that disclosed in Patent CN201680043004.5, involves a feed gear installed as a driven wheel, which may be a tension roller, pushing open the tension roller with a desired pressure at a short distance from a feed gear installed as a driving wheel, and manually operating the mechanical structure to separate the two yarn feed wheels, thereby facilitating the user to feed the binding yarn to the yarn guide mechanism through the path formed after separating the yarn feed wheels. However, this solution requires the operator to apply pressure with one hand while holding the yarn with the other, resulting in complex operations. Furthermore, the manual yarn feeding method is inefficient, has poor control over the feed amount, and is prone to waste of consumables. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Chinese Patent Application Publication No. 111706084 Summary of the Invention [Problem to be solved by the invention]

[0005] The technical problem to be solved by the present invention is to provide an automatic yarn feeding bundling machine and a yarn feeding control method based on an electric signal, which can realize automatic yarn feeding and improve the yarn feeding efficiency and safety of the bundling machine. [Means for solving the problem]

[0006] In order to solve the above technical problems, a first aspect of the present invention discloses an automatic yarn feeding bundling machine based on an electric signal, the automatic yarn feeding bundling machine comprising a yarn feeder, a driving yarn feeding wheel, a driven yarn feeding wheel, a yarn feeding motor, a yarn guiding mechanism and a processor, and a yarn reel for supplying a bundling yarn, the yarn feeding motor being controlled by the processor to drive and rotate the driving yarn feeding wheel, At least one of the driving yarn feed wheel and the driven yarn feed wheel and the yarn feeder have a conductive part, a yarn feeding control circuit is provided in the automatic yarn feeding bundling machine, the yarn feeding control circuit including 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 portion of the yarn feeder is connected to the first input terminal, A conductive portion of either the driving yarn feed wheel or the driven yarn feed wheel is connected to the second input terminal.

[0007] As an optional embodiment, in the first aspect of the present invention, the yarn feed control circuit further includes a third input terminal and a second output terminal, the second output terminal is 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 portion, and the conductive portion is connected to the third input terminal.

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

[0009] As an alternative embodiment, in a first aspect of the present invention, the first electrical signal and / or the second electrical signal are expressed in a TTL level skip format.

[0010] As an optional embodiment, in a first aspect of the present invention, the automatic yarn sending and bundling machine further comprises a switch, a yarn reel cover, and a yarn sending and bundling switching circuit, the yarn sending and knotting switching circuit includes a fourth input terminal, a fifth input terminal, and a third output terminal, the third output terminal is 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; Opening and closing the line 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, a binding yarn stroke distance between a conductive part of either the driving yarn feed wheel or the driven yarn feed wheel and a conductive part of the yarn feeder is set to 2 to 15 mm, and / or The bonded yarn stroke distance between the conductive part of either the driving yarn feed wheel or the driven yarn feed wheel and the conductive part of the yarn guide mechanism is set to 2 to 10 mm.

[0012] A second aspect of the present invention discloses a yarn feed control method, which is applied to the automatic yarn feed binding machine described above, and which comprises: When the first electrical signal is received, the processor drives the driving yarn feed wheel to rotate it a predetermined number of turns at a predetermined rotational speed, thereby advancing the binding yarn that is in contact with the meshing point between the driving yarn feed wheel and the driven yarn feed wheel by a predetermined feed amount toward the yarn guide mechanism.

[0013] In an alternative embodiment, in a second aspect of the invention, the method comprises: The method further includes the processor controlling the drive yarn feed wheel to stop the advancement of the binding yarn when the second electrical signal is received.

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

[0015] In an alternative embodiment, in a second aspect of the invention, the method comprises: When the third electrical signal is received, if the first electrical signal is received, the processor executes the operation of driving the driving yarn feed wheel to rotate it at a predetermined rotation speed for a predetermined number of turns; The method further includes the processor not receiving the first electrical signal if the third electrical signal is not received. [Effects of the Invention]

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

[0017] In an embodiment of the present invention, the conductive part between the yarn feeder and the yarn feed wheel is short-circuited by the binding yarn, which triggers the control circuit to output an electrical signal, and the processor controls the drive yarn feed wheel to feed the yarn according to the electrical signal. This makes it possible to automatically detect whether the position of the binding yarn has reached the yarn feeder, and when it has, automatically start the yarn feed operation. Therefore, it is possible to improve the accuracy and efficiency of determining whether the binding yarn is at the yarn feed start position, and automatic yarn feeding is realized, which improves the yarn feeding efficiency and safety of the binding machine compared to manually feeding the yarn directly or by pressing a key to open the yarn feed wheel and then manually feeding the yarn. [Brief explanation of the drawings]

[0018] In order to more clearly explain the technical solutions of the embodiments of the present invention, the following briefly describes the drawings necessary for describing the embodiments. Of course, the drawings described below are only examples of the embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings without any creative efforts. [Figure 1] FIG. 1 is a structural schematic diagram of an automatic yarn feeding and binding machine disclosed in an embodiment of the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of a yarn feed control circuit disclosed in an embodiment of the present invention. [Figure 3] FIG. 3 is a structural schematic diagram of the automatic yarn feeding and binding machine disclosed in the embodiment of the present invention with the yarn reel cover open. [Figure 4] FIG. 4 is a structural schematic diagram of the yarn sending and bundling switching circuit disclosed in the embodiment of the present invention. [Figure 5] FIG. 5 is a structural schematic diagram of another automatic yarn feeding binding machine disclosed in an embodiment of the present invention. [Figure 6] FIG. 6 is a schematic flowchart of a yarn feed control method disclosed in an embodiment of the present invention. [Figure 7] FIG. 7 is a structural schematic diagram of a yarn feeder disclosed in an embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional schematic view of a yarn feeder disclosed in an embodiment of the present invention. [Figure 9] FIG. 9 is a structural schematic diagram of a thread guide mechanism disclosed in an embodiment of the present invention. [Figure 10] FIG. 10 is a schematic cross-sectional view of a thread guide mechanism disclosed in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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 any inventive efforts fall within the protection scope of the present invention.

[0020] Example 1 1, which is a structural schematic diagram of an automatic yarn feeding and binding machine based on an electric signal disclosed in an embodiment of the present invention. The automatic yarn feeding and binding machine includes a yarn guide mechanism 1, a driven yarn feeding wheel 2, a driving yarn feeding wheel 3, a yarn feeder 4, a yarn reel 6 for supplying a binding yarn 5, a yarn feeding motor 7, and a processor 8. The yarn feeding motor 7 is controlled by the processor 8 to drive and rotate the driving yarn feeding wheel 3, At least one of the driving yarn feed wheel 3 and the driven yarn feed wheel 2 and the yarn feeder 4 have a conductive part, a yarn feeding control circuit is provided in the automatic yarn feeding bundling machine, 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 portion of the yarn feeder 4 is connected to the first input terminal, The conductive portion of either the driving yarn feed wheel 3 or the driven yarn feed wheel 2 is connected to the second input terminal.

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

[0022] In an embodiment of the present invention, the conductive part between the yarn feeder and the yarn feed wheel is short-circuited by the binding yarn, which triggers the control circuit to output an electrical signal, and the processor controls the drive yarn feed wheel to feed the yarn according to the electrical signal. This makes it possible to automatically detect whether the position of the binding yarn has reached the yarn feeder, and when it has, automatically start the yarn feed operation. Therefore, it is possible to improve the accuracy and efficiency of determining whether the binding yarn is at the yarn feed start position, and automatic yarn feeding is realized, which improves the yarn feeding efficiency and safety of the binding machine compared to manually feeding the yarn directly or by pressing a key to open the yarn feed wheel and then manually feeding the yarn.

[0023] In an alternative embodiment, the yarn 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 this alternative embodiment, when the second electrical signal is received, the processor 8 controls the driving yarn feed wheel 3 to stop the advancement of the binding yarn 5 .

[0025] In this alternative embodiment, when the binding yarn reaches the yarn guide mechanism, the conductive part between the yarn guide mechanism and the yarn feeder is short-circuited, triggering the control circuit to output an electrical signal, and the processor stops yarn feeding by the driven yarn feed wheel based on the electrical signal, thereby making it possible to determine whether the binding yarn has reached the yarn guide mechanism, improving the accuracy and efficiency of determining whether the binding yarn has reached the yarn guide mechanism, helping to further perfect the automatic yarn feeding process and improving the efficiency of automatic yarn feeding.

[0026] In another alternative embodiment, in the yarn feed control circuit, one of the first input terminal, the second input terminal and the third input terminal is connected to a first electrode, and the remaining two are connected to a second electrode, and the polarities of the first electrode and the second electrode are reversed.

[0027] 2, in the yarn feed control circuit JP1, 1 is a first input terminal, 2 is a second input terminal, and 3 is a third input terminal, and the circuit further includes resistors R1, R2, R3, R4, capacitors C1, C2, Zener diodes DZ1 and 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. The third input terminal is connected to the power supply by resistor R1 and to the second output terminal by resistor R3.

[0028] In another alternative embodiment, the first electrical signal and / or the second electrical signal are expressed in a TTL level skip format.

[0029] In another alternative embodiment, as shown in FIG. 3, the automatic yarn feeding and binding machine further comprises a switch 9, a yarn reel cover 10, and a yarn feeding and binding switching circuit, the yarn sending and knotting switching circuit includes a fourth input terminal, a fifth input terminal, and a third output terminal, the third output terminal is 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; Opening and closing the line 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 yarn sending knot 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 is connected to the third output terminal by the second resistor, the second input terminal is in contact with the ground terminal, and is connected to the third output terminal by the first capacitor.

[0031] In the selectable embodiment, for example, in the yarn feed knot switching circuit shown in FIG. 4, 1 in the yarn feed control circuit JP1 is a fourth input terminal, and 2 is a fifth input terminal, 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 a 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 for performing an automatic yarn feeding operation when the yarn reel cover is opened, thereby avoiding injuries to hands due to excessively fast yarn pulling speed during tying (when the rotation speed of the yarn feed wheel during tying is faster than the automatic yarn feeding speed), and when the yarn reel cover is closed, only the tying operation is performed without performing the automatic yarn feeding operation, thereby reducing the situation where yarn feeding is triggered due to poor contact between the tying yarn and the yarn feed wheel or yarn guide mechanism.

[0032] In this alternative embodiment, the opening and closing of the line reel cover triggers the on / off of a switch, and the on / off of the switch controls the short-circuit status of the two input terminals of the line feed knot switching circuit, thereby outputting an electrical signal for control, thereby reducing hand injuries and the situation of accidentally triggering line feed.

[0033] In another alternative embodiment, the switch 9 is a key switch or a pressure sensor switch, and the switch 9 is provided at 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 by placing the thread reel cover 10 over the switch 9.

[0034] The alternative embodiment serves to trigger the on / off of a switch by opening or closing the line reel cover, thereby subsequently outputting an electrical signal for control by the on / off of the switch.

[0035] In another alternative embodiment, as shown in FIG. 3, the thread reel cover 10 is a foldable cover, the cover includes a locking member 101, the locking member 101 is separated from the hinge connection portion 102 of the thread reel cover, the hinge connection portion 102 of the thread reel cover is hingedly connected 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 alternative embodiment, the switch is located adjacent to the locking member, and the locking member is separated from the hinge connection portion, so that when the user closes the line reel cover, the force applied to the locking member area is greater than that applied to other areas, thereby reducing the possibility of poor contact of the switch and further improving the accuracy of the subsequent electrical signal output.

[0037] In another alternative embodiment, the switch 9 is a transmissive photoelectric switch, and includes a light emitter and a light receiver, the light emitter is installed on the thread reel cover surface or a location other than the thread reel cover of the binding machine, and the light receiver is installed at 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 in the thread reel cover and a second contact fitted in the binding machine, and when the thread reel cover is closed, the first contact comes into contact with 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 another alternative embodiment, the third electrical signal is expressed in a TTL level skip format.

[0039] In another alternative embodiment, the bonded yarn stroke distance between the conductive part of either the driving yarn feed wheel 3 or the driven yarn feed wheel 2 and the conductive part of the yarn feeder 4 is set to 2 to 15 mm, and / or The bonded yarn stroke distance between the conductive part of either the driving yarn feed wheel 3 or the driven yarn feed wheel 2 and the conductive part of the yarn guide mechanism 1 is set to 2 to 10 mm.

[0040] In physical terms, if the diameter of the conductor does not change, the longer the conductor length, the greater the resistance of the conductor. This optional embodiment limits the stroke distance of the binding thread within a reasonable and relatively small range, which helps to limit the resistance of the binding thread during a short circuit within a relatively small resistance value range, reducing the occurrence of situations where the resistance value is too large to achieve a short circuit, and thereby improving the stability of achieving a short circuit using the binding thread.

[0041] In another alternative embodiment, as shown in FIG. 1 , the binding machine further comprises a rounding mechanism 11 (including a loop forming plate 111 and a guide 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 placed in a direction parallel to the axis and is located below the winding motor 13, the PCB board 14 has an extension portion that extends to the rear end of the winding motor 13, the PCB board 14 includes a communication component, a positioning component and a control component, the control component is installed on the surface of the PCB board 14 facing the winding motor 13, and the communication component and the positioning component are installed on the back surface of the extension portion facing away from the winding motor 13.

[0042] In this alternative embodiment, the PCB board is installed below the motor. When the motor is operating, hot air is generated around it and the hot air naturally rises, so the conduction of the hot air generated by the motor to the PCB board can be reduced. By installing the communication components and positioning components on the back side of the PCB board, the hot air can be further isolated and the impact of electromagnetic interference on the components can be reduced by being away from the motor's radiation.

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

[0044] In another alternative embodiment, as shown in FIG. 1, the binding machine further includes a moisture-proof and dust-proof case 15, and the PCB board 14 is disposed in the case 15.

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

[0046] This alternative embodiment installs the antenna on the inner wall of the casing corresponding to the empty cavity, and is away from the bobbin winding motor, thereby reducing the electromagnetic interference of the motor and improving the communication quality of the antenna.

[0047] In another alternative embodiment, the surface of the PCB board 14 facing the bobbin winding motor 13 is covered with a sealant.

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

[0049] In another alternative embodiment, a ground layer is provided on the rear surface of the PCB substrate 14 facing away from the bobbin winding motor 13, and the ground layer is copper plated.

[0050] This alternative embodiment can achieve the role of isolating direct radiation of electromagnetic fields by copper plating the PCB substrate and grounding it.

[0051] Alternatively, as shown in FIG. 5, a locking groove 17 is provided inside the casing of the strapping machine, and the case of the PCB board 14 is removably fitted into the locking groove 17.

[0052] Referring to FIG. 6, FIG. 6 is a schematic flowchart of a yarn feed control method disclosed in an embodiment of the present invention, and the yarn feed control method includes: When the first electrical signal is received, the processor drives the driving yarn feed wheel to rotate it a predetermined number of turns at a predetermined rotational speed, thereby advancing the binding yarn that is in contact with the meshing point between the driving yarn feed wheel and the driven yarn feed wheel by a predetermined feed amount toward the yarn guide mechanism (S101).

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

[0054] In the embodiment of the present invention, the reception of the first electrical signal is determined as a yarn feed start signal, thereby improving the accuracy and efficiency of determining the yarn feed start timing. The electrical signal triggers the processor to control the main driving wheel to rotate a set number of turns, thereby realizing control of the yarn feed amount. This improves the yarn feed efficiency and accuracy of the binding machine compared to the manual yarn feeding method in the prior art. Furthermore, the predetermined rotation speed is set so as not to injure hands, thereby reducing the risk of hand injury due to the high rotation speed of the main driving wheel in the prior art binding machine.

[0055] In an alternative embodiment, the method comprises: The method may further include the processor controlling the driving yarn feed wheel to stop the advancement of the binding yarn when the second electrical signal is received.

[0056] This optional embodiment determines the receipt of the second electrical signal as a signal to stop the advancement of the binding cord, thereby improving the accuracy and efficiency of determining the timing to stop the advancement of the binding cord.

[0057] In another alternative embodiment, the method further comprises: When the third electrical signal is received, if the first electrical signal is received, the processor executes the operation of driving the driving yarn feed wheel to rotate it at a predetermined rotation speed for a predetermined number of turns; The method may further include the processor not receiving the first electrical signal if the third electrical signal is not received.

[0058] This optional embodiment determines that receipt of the third electrical signal is a prerequisite for entering the automatic yarn feeding program, and does not perform the automatic yarn feeding operation if the third electrical signal is not received, thereby reducing the risk of hand injury (when the user opens the thread reel cover, the trigger is accidentally pulled, and because the feeding speed of the binding thread is fast, if the user's hand is located close to the binding thread, the hand is likely to be injured by the fast movement of the binding thread) and situations in which yarn feeding is triggered due to poor contact of the binding thread, thereby improving the safety of the binding machine.

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

[0060] In an embodiment of the present invention, a photosensitive element is installed to determine a trigger signal when the binding yarn passes through the yarn feeder, and a processor controls the driven yarn feed wheel to feed the yarn according to the signal, so that it can automatically detect whether the binding yarn reaches the yarn feeder, and when it does, it automatically starts to perform the yarn feed operation. Therefore, it is possible to improve the accuracy and efficiency of determining whether the binding yarn is at the yarn feed start position, and automatic yarn feeding is realized, which improves the yarn feeding efficiency and safety of the binding machine compared to manually feeding the yarn directly or by pressing a key to open the yarn feed wheel and then manually feeding the yarn.

[0061] In an alternative embodiment, the first photosensitive member is a groove-type photoelectric sensor or a transmission-type photoelectric sensor in which a light emitter and a light receiver are respectively installed on both sides of the internal passage of the yarn feeder, or The first photosensitive member is a reflector type photoelectric switch, and the light emitter and the light receiver of the reflector type photoelectric switch are provided on the same side of the internal passage of the yarn feeder, and the reflector is provided at a position facing the light emitter and the light receiver in the internal passage of the yarn feeder, or The first photosensitive member is a diffuse reflection type photoelectric switch, or The first photosensitive member is a brightness sensor, the photosensitive side of which faces the internal passage of the yarn feeder, and outputs the first signal based on a change in brightness caused by the passing of the binding yarn through the yarn feeder.

[0062] In another alternative embodiment, the interior of the yarn feeder has a hollow structure, and the interior of the yarn feeder forms an internal passage penetrating from the top to the bottom, the horizontal cross-sectional area of ​​the internal passage of the yarn feeder gradually decreases from the bottom to the top, and the first photosensitive member is installed at the top of the internal passage of the yarn feeder.

[0063] For example, a yarn feeder is shown in FIG. 7, and FIG. 8 is a cross-sectional view of the yarn feeder. A first photosensitive element is installed at the top of the yarn feeder. If the first photosensitive element is a transmission-type photoelectric sensor, 18 in FIG. 8 is a light emitter and 19 is a light receiver.

[0064] The binding yarn enters the internal passage of the yarn feeder from the bottom, and since the internal space of the yarn feeder becomes narrower as it approaches the top, the binding yarn is fixed in position up to the top of the yarn feeder, and this alternative embodiment can further improve the accuracy of determining the yarn feeding start timing by installing the first photosensitive element at the top of the yarn feeder.

[0065] In another alternative embodiment, the yarn feeder is located adjacent to the edge of the yarn reel cover, and the closest distance between the yarn feeder and the edge is 1 to 5 cm.

[0066] As can be seen from FIG. 3, the closer an object is to the edge of the thread reel cover, the greater the illumination intensity received by the object. In this alternative embodiment, the thread feeder is located adjacent to the edge of the thread reel cover. When the thread reel cover is opened, the light change caused by the binding thread passing through the area where the photosensitive element is located becomes even greater, which helps to improve the accuracy and efficiency of determining whether the binding thread is at the target position.

[0067] In another alternative embodiment, the automatic yarn feeding binding machine further comprises a yarn guide mechanism, A second photosensitive element is installed in the internal passage of the thread guide mechanism, and the output terminal of the second photosensitive element is connected to the processor, and outputs a second signal to the processor by detecting a change in light caused by the binding thread passing through the thread guide mechanism.

[0068] In this alternative embodiment, when the second signal is received, the processor 8 controls the drive yarn feed wheel 3 to stop the advancement of the binding yarn 5 .

[0069] This alternative embodiment uses a photosensitive element to determine a trigger signal when the binding yarn enters the yarn guide mechanism, and the processor stops yarn feeding by the driven yarn feed wheel according to this signal, allowing it to automatically detect whether the binding yarn has entered the yarn guide mechanism, improving the accuracy and efficiency of determining whether the binding yarn has entered the yarn guide mechanism, helping to further perfect the automatic yarn feeding process and improving the efficiency of automatic yarn feeding.

[0070] In another alternative embodiment, 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, the thread guide mechanism is shown in FIG. 9, and FIG. 10 is a cross-sectional view of the thread guide mechanism. If the second photosensitive element is installed at the bottom of the thread guide mechanism and the second photosensitive element is a transmission-type photoelectric sensor, then 20 in FIG. 10 is a light emitter and 21 is a light receiver.

[0072] This optional embodiment installs the photosensitive element of the yarn guide mechanism at the bottom, which helps to determine the time when the binding yarn has just entered the yarn guide mechanism as the time to stop yarn feeding by the driving yarn feed wheel, thereby improving the accuracy and efficiency of determining the time to stop yarn feeding by the driving yarn 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 solutions of the present invention, not to limit the same. 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 they may still modify the technical solutions described in the above embodiments or equivalently replace some of the technical features therein, but such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic yarn feeding and binding machine based on an electrical signal, The automatic yarn feeding and bundling machine includes a yarn feeder, a driving yarn feeding wheel, a driven yarn feeding wheel, a yarn feeding motor, a yarn guide mechanism, a processor, and a yarn reel for supplying a bundling yarn, and the yarn feeding motor is controlled by the processor based on an electric signal to drive and rotate the driving yarn feeding wheel, At least one of the driving yarn feed wheel and the driven yarn feed wheel and the yarn feeder have a conductive part, a yarn feeding control circuit is provided in the automatic yarn feeding bundling machine, the yarn feeding control circuit including 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 portion of the yarn feeder is connected to the first input terminal, An automatic yarn feeding and binding machine based on an electric signal, characterized in that a conductive portion of either the driving yarn feeding wheel or the driven yarn feeding wheel is connected to the second input terminal.

2. the yarn feed control circuit further includes a third input terminal and a second output terminal, the second output terminal is 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; 2. The automatic yarn feeding binding machine according to claim 1, wherein the yarn guide mechanism has a conductive portion, and the conductive portion is connected to the third input terminal.

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

4. The automatic yarn feeding and binding machine according to claim 2, wherein the first electric signal and / or the second electric signal is expressed in a TTL level skip format.

5. An automatic yarn feeding and bundling machine further comprising a switch, a yarn reel cover, and a yarn feeding and bundling switching circuit, the yarn sending and knotting switching circuit includes a fourth input terminal, a fifth input terminal, and a third output terminal, the third output terminal is 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 yarn feeding binding machine according to claim 2 or 3, characterized in that opening and closing of the yarn reel cover triggers 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. A binding yarn stroke distance between a conductive part of either the driving yarn feed wheel or the driven yarn feed wheel and a conductive part of the yarn feeder is set to 2 to 15 mm, and / or The automatic yarn feeding bundling machine according to claim 2, characterized in that the binding yarn stroke distance between the conductive part of either the driving yarn feeding wheel or the driven yarn feeding wheel and the conductive part of the yarn guide mechanism is set to 2 to 10 mm.

7. A yarn feeding control method, The method is applied to an automatic yarn feeding binding machine according to any one of claims 1 to 6, and the method comprises: a yarn feed control method characterized in that, when the first electrical signal is received, the processor drives the driving yarn feed wheel to rotate it a predetermined number of turns at a predetermined rotational speed, thereby advancing the binding yarn that is in contact with the point where gears between the driving yarn feed wheel and the driven yarn feed wheel mesh with each other by a predetermined feed amount toward the yarn guide mechanism.

8. The method comprises: The yarn feed control method according to claim 7, further comprising: when the second electrical signal is received, the processor controls the driving yarn feed wheel to stop the advancement of the binding yarn.

9. The yarn feed control method according to claim 7, wherein the predetermined rotation speed is set so as not to injure a hand when advancing the binding yarn.

10. The method comprises: When the third electrical signal is received, if the first electrical signal is received, the processor executes the operation of driving the driving yarn feed wheel to rotate it at a predetermined rotation speed for a predetermined number of turns; The yarn feeding control method according to claim 7, further comprising: when the third electrical signal is not received, the processor does not receive the first electrical signal.

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