Button sewing machine and control method thereof

Abstract

The invention discloses a button sewing machine and a control method of the button sewing machine, and relates to the technical field of sewing machines, and the button sewing machine comprises a button clamp mechanism, a lifting and pressing thread trimming mechanism and a control system. The button clamp mechanism comprises a button clamp driving assembly and a clamp assembly, the lifting and pressing trimming mechanism comprises a lifting and pressing trimming driving assembly and a trimming knife assembly, the control system is in communication connection with the button clamp driving assembly and the lifting and pressing trimming driving assembly, and the control system is used for controlling the button clamp driving assembly and the lifting and pressing trimming driving assembly to work. The forceps holder assembly is opened when the forceps holder assembly is located at a preset position or a preset time point before the forceps holder assembly is lifted to the highest position, and the thread trimmer assembly is closed to complete thread trimming after the forceps holder assembly is opened. According to the button sewing machine, the problem that a worker needs to cut threads again due to the fact that the thread ends of sewn buttons are long is solved, stitches are more attractive, and sewing efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of sewing machine technology, and in particular to a button attaching machine and a control method for the button attaching machine. Background Technology

[0002] Currently, sewing machines are a very important type of industrial equipment and are widely used in many fields.

[0003] In the current system, sewing machines have entered the era of digital control. Among them, button attaching machines, as a special type of sewing machine, are widely used in post-processing. However, most current button attaching machines use a mechanical structure that integrates the pressing and trimming actions. The main problem with this mechanism is that after sewing is completed, when the presser foot is lifted, the button and fabric are lifted together, and the thread trimming mechanism trims the thread, resulting in a long thread tail left at the bottom of the fabric. Long thread tails from sewn buttons have always been a major problem in the market. Because they affect the appearance of garments, workers need to manually trim the thread, leading to low overall work efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a button sewing machine and a control method for the button sewing machine, which solves the problem of needing to trim the thread again due to the long thread end of the sewn button.

[0005] To achieve the above objectives, this application provides a button-attaching machine, comprising:

[0006] A button clamping mechanism, comprising a button clamping drive assembly and a clamping assembly, wherein the button clamping drive assembly is connected to the clamping assembly to drive the clamping assembly to open and close, and the clamping assembly is used to clamp buttons and to press fabric.

[0007] The lifting and pressing wire cutting mechanism includes a lifting and pressing wire cutting drive assembly and a wire cutting knife assembly. The lifting and pressing wire cutting drive assembly is connected to the clamping mechanism to drive the clamping assembly to lift and lower. The lifting and pressing wire cutting drive assembly is also connected to the wire cutting knife assembly to drive the wire cutting knife assembly to open and close.

[0008] The control system is connected in communication with the clamp drive assembly and the wire cutting drive assembly. It is used to control the operation of the clamp drive assembly and the wire cutting drive assembly, so that the clamp assembly opens when it is in a preset position or at a preset time point before it is raised to the highest position, and closes the wire cutting knife assembly to complete the wire cutting after the clamp assembly is opened.

[0009] In some embodiments, the caliper drive assembly includes:

[0010] The pliers linkage assembly connects to the clamping assembly;

[0011] The telescopic drive component, connected to the pliers linkage assembly, provides power to enable the pliers linkage assembly to open and close the clamping assembly.

[0012] In some embodiments, the clamp mechanism further includes a clamp seat, and the telescopic drive is fixed to the clamp seat;

[0013] The plier linkage component includes:

[0014] Rod end spherical bearing, installed on the telescopic end of the telescopic drive component;

[0015] The button clamp drive rod is rotatably mounted on the button clamp seat, and one end of the button clamp drive rod is rotatably connected to the rod end spherical bearing;

[0016] The button clip connecting rod is rotatably connected to the other end of the button clip drive rod;

[0017] The pliers are connected to the pliers connecting rod and the clamp assembly to drive the clamp assembly to open and close.

[0018] In some embodiments, the button attaching machine further includes a housing, and the button clamp mechanism further includes a button clamp lifting hook, which is fixed to the button clamp base;

[0019] The lifting and shearing drive assembly includes:

[0020] Lift the hook to engage with the lifting hook of the pliers, thereby raising the lifting hook of the pliers;

[0021] The lifting lever is mounted on the machine housing and is connected to the lifting hook;

[0022] The lifting and pressing linkage is rotatably connected to the end of the lifting and pressing swing arm away from the lifting hook;

[0023] A support link is rotatably mounted on the housing, and the first end of the support link is rotatably connected to the other end of the lifting link;

[0024] A wire-cutting link, one end of which is rotatably connected to the second end of a support link;

[0025] The lifting crank is rotatably mounted on the machine housing, and one end of the lifting crank is rotatably connected to the other end of the wire cutting connecting rod;

[0026] The lifting cam abuts against the other end of the lifting cam crank;

[0027] The lifting and pressing wire shearing drive unit is connected to the lifting and shearing cam and is used to provide power to drive the lifting and shearing cam to rotate.

[0028] In some embodiments, the lifting crank is V-shaped, and a ball bearing is provided at the end of the lifting crank away from the wire cutting connecting rod, with the ball bearing in close contact with the lifting cam.

[0029] In some embodiments, the lifting and pressing thread cutting mechanism further includes a needle plate assembly, and the thread cutting knife assembly includes a fixed thread cutting knife and a movable thread cutting knife. The fixed thread cutting knife is fixed to the back of the needle plate assembly, and the movable thread cutting knife is rotatably disposed on the back of the needle plate assembly.

[0030] The lifting and pressing wire cutting drive assembly also includes a moving blade drive linkage. One end of the moving blade drive linkage is rotatably connected to the third end of the support linkage, and the other end of the moving blade drive linkage is rotatably connected to the wire cutting moving blade, so as to drive the wire cutting moving blade to rotate relative to the wire cutting fixed blade.

[0031] In some embodiments, the housing includes:

[0032] The lower housing section is used to install the caliper seat, control system, and support linkage.

[0033] The upper section of the housing, connected to the lower section, is used to install the lifting and shearing drive, the lifting and shearing lever, and the lifting and shearing crank.

[0034] In some embodiments, the button attaching machine further includes a user operation module, which is communicatively connected to the control system to transmit received user operation commands to the control system.

[0035] In some embodiments, the control system includes:

[0036] The receiving module is communicatively connected to the user operation module and is used to receive user operation commands transmitted by the user operation module.

[0037] The control module, which is connected to the receiving module, is used to transmit control signals to the pliers drive assembly and the wire lifting and cutting drive assembly.

[0038] This application also provides a control method for a button-attaching machine, applicable to any of the button-attaching machines described above, the control method comprising:

[0039] After the button is sewn onto the fabric, the lifting and cutting drive assembly of the lifting and cutting mechanism is controlled by the control system to start performing the actions of lifting the clamping assembly of the button clamping mechanism and closing the cutting blade assembly of the lifting and cutting mechanism.

[0040] When the clamping assembly is in a preset position or at a preset time point before being raised to the highest position, the control system controls the clamping drive assembly of the button clamping mechanism to open the clamping assembly to release the button and fabric.

[0041] After opening the clamping assembly, close the wire cutter assembly to complete the wire cutting.

[0042] Compared to the aforementioned background technology, the button-attaching machine provided in this application includes a button clamping mechanism, a lifting and pressing thread-cutting mechanism, and a control system. The button clamping mechanism includes a button clamping drive assembly and a clamping assembly. The button clamping drive assembly is connected to the clamping assembly to drive the clamping assembly to open and close. The clamping assembly is used to clamp the button and to press the fabric. The lifting and pressing thread-cutting mechanism includes a lifting and pressing thread-cutting drive assembly and a thread-cutting knife assembly. The lifting and pressing thread-cutting drive assembly is connected to the button clamping mechanism to drive the clamping assembly to lift and lower. The lifting and pressing thread-cutting drive assembly is also connected to the thread-cutting knife assembly to drive the thread-cutting knife assembly to open and close. The control system is communicatively connected to the button clamping drive assembly and the lifting and pressing thread-cutting drive assembly. The control system controls the operation of the button clamping drive assembly and the lifting and pressing thread-cutting drive assembly, causing the clamping assembly to open at a preset position or preset time point before the clamping assembly reaches its highest position, and then closing the thread-cutting knife assembly to complete the thread cutting after the clamping assembly is opened.

[0043] Meanwhile, this application also provides a control method for a button sewing machine, applied to the aforementioned button sewing machine. The control method includes: after the button is sewn onto the fabric, the control system controls the lifting and pressing thread cutting drive assembly of the lifting and pressing thread cutting mechanism to start performing the actions of lifting the clamping assembly of the button clamping mechanism and closing the thread cutting knife assembly of the lifting and pressing thread cutting mechanism; when the clamping assembly is raised to a preset position or preset time point before the highest position, the control system controls the button clamping drive assembly of the button clamping mechanism to open the clamping assembly to release the button and the fabric; after opening the clamping assembly, the thread cutting knife assembly is closed to complete the thread cutting.

[0044] Therefore, the beneficial effects of the button sewing machine and its control method provided in this application mainly include: considering that the length of the thread left on the fabric depends on the height the button is raised when the thread-cutting knife assembly is closed, it can be known that the smaller the height the button is raised, the shorter the thread left on the fabric. Therefore, in the process of cutting the thread on the fabric for sewing buttons, this application can flexibly control the clamping assembly to release the button at a preset position or preset time point during the process from the start to the end of the lifting, thereby achieving free control of the length of the thread left on the fabric within a certain length range. Compared with the traditional setting method that cannot control the length of the thread left on the fabric, the button sewing machine provided in this application not only has a button clamping drive assembly that separately controls the opening and closing of the clamping assembly, but also achieves synchronous execution of lifting and cutting actions by setting the same drive source (lifting and pressing thread-cutting drive assembly). In addition, it can flexibly control the length of the thread left, solving the problem that workers need to cut the thread again due to the long thread left on the sewn button, and making the stitches more beautiful and improving sewing efficiency. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the overall structure of the button-attaching machine in the embodiments of this application;

[0047] Figure 2 This is an assembly diagram of the button-attaching machine in an embodiment of this application;

[0048] Figure 3 for Figure 2 The diagram shows the structure of the button clamp mechanism in the button attaching machine.

[0049] Figure 4 for Figure 3 Another angle diagram of the button clamp mechanism shown;

[0050] Figure 5 for Figure 2 The diagram shows the structure of the thread cutter assembly in the button attaching machine;

[0051] Figure 6 This is a control block diagram of the button-attaching machine in an embodiment of this application;

[0052] Figure 7 This is a flowchart of the control method for the button-attaching machine in an embodiment of this application.

[0053] in:

[0054] 10-Button clamp mechanism, 11-Button clamp drive assembly, 111-Button clamp linkage assembly, 1111-Rod end joint bearing, 1112-Button clamp drive rod, 1113-Button clamp connecting rod, 1114-Button clamp piece, 112-Telescopic drive component, 12-Clamp assembly, 121-Pressure foot, 13-Button clamp seat, 14-Button clamp lifting hook;

[0055] 20-Lifting and pressing thread cutting mechanism, 21-Lifting and pressing thread cutting drive assembly, 211-Lifting hook, 212-Lifting and pressing swing arm, 213-Lifting and pressing connecting rod, 214-Support connecting rod, 215-Thread cutting connecting rod, 216-Lifting and cutting crank, 2161-Ball bearing, 217-Lifting and cutting cam, 218-Lifting and pressing thread cutting drive component, 219-Moving blade drive connecting rod, 22-Thread cutting blade assembly, 221-Thread cutting fixed blade, 222-Thread cutting moving blade, 23-Needle plate assembly;

[0056] 30-Control system;

[0057] 40 - User Operation Module;

[0058] 50 - Housing, 51 - Lower section of housing, 52 - Upper section of housing. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0061] Please see Figure 1 The button attaching machine provided in this application embodiment includes a button clamp mechanism 10, a lifting and pressing thread cutting mechanism 20, and a control system 30.

[0062] The button clamping mechanism 10 includes a button clamping drive assembly 11 and a clamping assembly 12. The button clamping drive assembly 11 is connected to the clamping assembly 12 to drive the clamping assembly 12 to open and close. The clamping assembly 12 mainly includes two presser feet 121, which are used to clamp the button and also to press the fabric.

[0063] The lifting and pressing wire cutting mechanism 20 includes a lifting and pressing wire cutting drive assembly 21 and a wire cutting knife assembly 22. The lifting and pressing wire cutting drive assembly 21 is connected to the clamping mechanism 10 to drive the clamping assembly 12 to lift and lower, and the lifting and pressing wire cutting drive assembly 21 is connected to the wire cutting knife assembly 22 to drive the wire cutting knife assembly 22 to open and close.

[0064] The control system 30 is communicatively connected to the pliers drive assembly 11 and the lifting and pressing wire cutting drive assembly 21. The control system 30 is used to control the operation of the pliers drive assembly 11 and the lifting and pressing wire cutting drive assembly 21, so that the clamping assembly 12 opens at a preset position or preset time point before being raised to the highest position, and closes the wire cutting knife assembly 22 after opening the clamping assembly 12 to complete the wire cutting.

[0065] Considering that the length of the thread left on the fabric depends on the height of the button when the thread-cutting knife assembly 22 is closed, it can be known that the smaller the height of the button being lifted, the shorter the thread left on the fabric. Therefore, in the process of cutting the thread on the fabric for sewing buttons, the control system 30 flexibly controls the clamping assembly 12 to release the button at a preset position or preset time point during the process from the start of lifting to the end of lifting, so that the length of the thread left on the fabric can be freely controlled within a certain length range.

[0066] In this way, compared with the traditional setting method that cannot control the length of the thread ends on the fabric, the button sewing machine provided in this application not only has a button clamp drive assembly 11 that separately controls the opening and closing of the clamp assembly 12, but also achieves synchronous execution of lifting and cutting actions by setting the same drive source (lifting and pressing thread cutting drive assembly 21). In addition, it can flexibly control the length of the thread ends, solving the problem that workers need to cut the thread again when the button thread ends are too long, and making the stitches more beautiful and improving sewing efficiency.

[0067] Please refer to the following: Figures 2 to 5 The following describes in detail the construction of the button clamp mechanism 10 and the lifting and pressing wire cutting mechanism 20.

[0068] In some embodiments, the clamp drive assembly 11 includes a clamp linkage assembly 111 and a telescopic drive member 112. The clamp linkage assembly 111 is connected to the clamp assembly 12 to drive the clamp assembly 12 to open and close; the telescopic drive member 112 is connected to the clamp linkage assembly 111 and provides power so that the clamp linkage assembly 111 drives the clamp assembly 12 to open and close.

[0069] Of course, depending on actual needs, the above-mentioned telescopic drive 112 can be a cylinder drive or an electric cylinder drive. Taking a cylinder drive as an example, when air enters through the left end air inlet of the cylinder drive, the telescopic end of the cylinder drive extends out, and when air enters through the right end air inlet of the cylinder drive, the telescopic end of the cylinder drive retracts.

[0070] In this way, the telescopic drive 112 and the linkage of the button clamping assembly 111 can drive the clamping assembly 12 to perform opening and closing actions. When the two pressure feet 121 of the clamping assembly 12 are open, the button can be placed easily, and when the two pressure feet 121 of the clamping assembly 12 are closed, the button can be clamped.

[0071] In some embodiments, the clamp mechanism 10 further includes a clamp seat 13, and the telescopic drive member 112 is fixedly mounted on the clamp seat 13 via a cylinder mounting plate.

[0072] Furthermore, the button clamp linkage assembly 111 includes a rod end joint bearing 1111, a button clamp drive rod 1112, a button clamp connecting rod 1113, and a button clamp piece 1114.

[0073] The rod end spherical bearing 1111 is installed on the telescopic end of the telescopic drive 112. The telescopic end can be provided with a threaded joint for installing the rod end spherical bearing 1111. The telescopic drive 112 performs telescopic reciprocating motion by air intake and exhaust. The button clamp drive rod 1112 is rotatably mounted on the button clamp seat 13. One end of the button clamp drive rod 1112 is rotatably connected to the rod end spherical bearing 1111, and the other end of the button clamp drive rod 1112 is rotatably connected to the button clamp connecting rod 1113. The button clamp piece 1114 is connected to the button clamp connecting rod 1113 and the clamp assembly 12 to drive the clamp assembly 12 to open and close.

[0074] In other words, the cylinder drive unit is connected to the rod end joint bearing 1111, the rod end joint bearing 1111 is connected to the button clip drive rod 1112, the button clip drive rod 1112 is connected to the button clip connecting rod 1113, the button clip connecting rod 1113 is connected to the button clamp piece 1114, the button clamp piece 1114 has a W-shaped groove at the front end and a pin at the rear end that connects to the button clip connecting rod 1113. In this way, when the cylinder drive unit pushes the rod end joint bearing 1111 forward, the button clip drive rod 1112 rotates clockwise around the central hole at a certain angle and pulls the button clip connecting rod 1113 backward. When the button clip connecting rod 1113 pulls the button clamp piece 1114 backward, the left and right pressure feet 121 will open to both sides according to the W-shaped groove, thereby achieving the purpose of opening the left and right pressure feet 121.

[0075] In addition, the button clamp mechanism 10 also includes a button clamp lifting hook 14, which is fixed on the button clamp base 13. When it is necessary to lift the two press feet 121 of the button clamp mechanism 10, the button clamp lifting hook 14 is lifted by the lifting and pressing wire cutting drive assembly 21, so that the two press feet 121 are lifted to a certain height.

[0076] To facilitate the installation of the button clamp mechanism 10, the lifting and pressing wire cutting mechanism 20, and the control system 30, the button attaching machine also includes a housing 50. The button clamp mechanism 10, the lifting and pressing wire cutting mechanism 20, and the control system 30 are all mounted on the housing 50. The housing 50 includes a lower housing section 51 and an upper housing section 52. The button clamp seat 13 is fixed to the lower housing section 51 by a pin (not shown in the figure). The button clamp seat 13 can swing in the circumferential direction with the pin as the axis. The control system 30 is mounted on the lower housing section 51, and the lifting and pressing wire cutting drive component 218 of the lifting and pressing wire cutting drive assembly 21 is mounted on the upper housing section 52.

[0077] In some embodiments, the lifting and pressing wire cutting drive assembly 21 includes a lifting hook 211, a lifting and pressing swing arm 212, a lifting and pressing connecting rod 213, a support connecting rod 214, a wire cutting connecting rod 215, a lifting and cutting crank 216, a lifting and cutting cam 217, and a lifting and pressing wire cutting drive member 218.

[0078] The lifting hook 211 cooperates with the lifting hook 14 of the pliers, and the lifting hook 211 is used to drive the lifting hook 14 to lift. The lifting and pressing swing rod 212 is oscillatingly mounted on the upper section 52 of the housing and connected to the lifting hook 211. One end of the lifting and pressing connecting rod 213 is rotatably connected to the end of the lifting and pressing swing rod 212 away from the lifting hook 211, and the other end of the lifting and pressing connecting rod 213 is rotatably connected to the first end of the supporting connecting rod 214. The supporting connecting rod 214 is rotatably mounted on the housing. On the lower section 51, one end of the wire-cutting connecting rod 215 is rotatably connected to the second end of the support connecting rod 214, and the other end of the wire-cutting connecting rod 215 is rotatably connected to one end of the lifting crank 216. The lifting crank 216 is rotatably mounted on the upper section 52 of the housing, and the other end of the lifting crank 216 abuts against the lifting cam 217. The lifting and pressing wire-cutting drive 218 is connected to the lifting cam 217 and is used to provide power to drive the lifting cam 217 to rotate.

[0079] Of course, depending on actual needs, the lifting and pressing wire cutting drive component 218 can be a lifting and pressing wire cutting drive motor. The lifting and cutting cam 217 can then be mounted on the drive shaft of the lifting and pressing wire cutting drive motor.

[0080] In some embodiments, the lifting crank 216 is V-shaped, and a ball bearing 2161 is provided at the end of the lifting crank 216 away from the wire cutting connecting rod 215. The ball bearing 2161 is in close contact with the lifting cam 217.

[0081] In some embodiments, the lifting and pressing thread cutting mechanism 20 further includes a needle plate assembly 23, and the thread cutting knife assembly 22 includes a fixed thread cutting knife 221 and a movable thread cutting knife 222. The fixed thread cutting knife 221 is fixed to the back of the needle plate assembly 23, and the movable thread cutting knife 222 is rotatably disposed on the back of the needle plate assembly 23.

[0082] Meanwhile, the lifting and pressing wire cutting drive assembly 21 also includes a moving blade drive link 219. One end of the moving blade drive link 219 is rotatably connected to the third end of the support link 214, and the other end of the moving blade drive link 219 is rotatably connected to the wire cutting moving blade 222, so as to drive the wire cutting moving blade 222 to rotate relative to the wire cutting fixed blade 221.

[0083] In other words, the middle part of the support link 214 is rotatably connected to the lower section 51 of the housing, the first end is connected to the lifting link 213, the second end is connected to the wire cutting link 215, and the third end is connected to the moving knife drive link 219.

[0084] In this way, under the rotational power of the lifting and pressing wire cutting drive motor, one path can drive the lifting hook 14 of the pliers to be lifted by lifting hook 211, and the other path can drive the moving blade drive linkage 219 to drive the wire cutting moving blade 222 and the wire cutting fixed blade 221 to close.

[0085] As can be seen, the lower section 51 of the housing 50 is used to install the pliers seat 13, the control system 30 and the support rod 214. The upper section 52 of the housing is connected to the lower section 51 and is used to install the lifting and pressing wire cutting drive 218, the lifting and pressing swing rod 212 and the lifting and cutting crank 216.

[0086] Please refer to the following: Figure 6 To facilitate the transmission of user operation instructions, the button attaching machine also includes a user operation module 40, which is communicatively connected to the control system 30 so that the user operation module 40 can transmit the received user operation instructions to the control system 30.

[0087] In some embodiments, the user operation module 40 may be a foot pedal or a handle, etc.

[0088] Furthermore, the control system 30 includes a receiving module and a control module. The receiving module is communicatively connected to the user operation module 40 and is used to receive user operation commands transmitted by the user operation module 40. The control module is communicatively connected to the receiving module and is used to transmit control signals to the clamp drive assembly 11 and the wire lifting and cutting drive assembly 21.

[0089] In some embodiments, the control system 30 may be a control board structure with a control chip.

[0090] The working principle of the button attaching machine provided in this application is explained in detail below:

[0091] When preparing to sew, the worker uses their toes to step on the foot pedal. After receiving the command from the foot pedal, the control system 30 simultaneously sends signals to the lifting and cutting thread drive 218 and the telescopic drive 112. The telescopic drive 112 receives the signal and executes the command, allowing air to enter through the left air inlet, pushing the rod end joint bearing 1111 forward. The rod end joint bearing 1111, through the button clip drive rod 1112, the button clip connecting rod 1113, and the button clamp plate 1114, causes the two presser feet 121 of the button clip assembly to open. The lifting and pressing thread-cutting drive unit 218 receives a signal, and its drive shaft drives the lifting cam 217 to rotate counterclockwise by a certain angle, pushing the cylindrical ball 2161 on the lifting crank 216 upward. The lifting crank 216 pulls the thread-cutting connecting rod 215 backward, which in turn pulls the upper end (i.e., the second end) of the support connecting rod 214 backward. This causes the lower end (the third end) of the support connecting rod 214 to push forward, thereby pushing the moving blade drive connecting rod 219 forward as well. The front end of the moving blade drive connecting rod 219 is connected to the needle plate assembly. The wire-cutting blade 222 on the back of the 23 drives the connecting rod 219 forward, so that the wire-cutting blade 222 and the wire-cutting fixed blade 221 are in the closed state (i.e., cutting the wire); in addition, since the support connecting rod 214 will rotate counterclockwise by a certain angle around the central hole, the lifting and pressing connecting rod 213 connected to the support connecting rod 214 will be pulled down by the support connecting rod 214, and the lifting and pressing swing rod 212 connected to the lifting and pressing connecting rod 213 will rotate counterclockwise by a certain angle, so that the lifting hook 211 contacts the button pliers lifting hook 14, and lifts the presser foot 121.

[0092] When the worker inserts the button, they step on the foot pedal with their heel. After receiving the command from the foot pedal, the control system 30 first sends a signal to the telescopic drive component 112. The telescopic drive component 112 receives the signal and air enters through the air inlet on its right end, pushing the rod end joint bearing 1111 backward. The rod end joint bearing 1111, through the button clip drive rod 1112, the button clip connecting rod 1113, and the button clamping plate 1114, causes the two presser feet 121 of the button clip assembly to clamp the button. Then, the control system 30 sends a signal to the lifting and pressing thread cutting drive component 218. The lifting and pressing thread cutting drive component 218 receives the signal, and the drive shaft of the lifting and cutting drive component 218 drives the lifting and cutting cam 217 to rotate clockwise by a certain angle. Through a series of linked actions, the lifting hook 211 and the button clamp lifting hook 14 are separated, the presser foot 121 is lowered, and the thread cutting moving blade 222 and the thread cutting fixed blade 221 are opened, and sewing begins.

[0093] After the main spindle motor (not shown in the figure) rotates a certain number of times, the sewing ends. The main spindle motor sends a signal to the control system 30. The control system 30 receives the signal and sends a signal to the telescopic drive component 112 and the lifting and pressing thread-cutting drive component 218. The control system 30 controls the lifting and pressing thread-cutting drive component 21 to start lifting the clamping component 12 and closing the thread-cutting knife component 22. When the clamping component 12 is at a preset position or preset time point before being raised to the highest position, the control system 30 controls the button clamping drive component 11 to open the clamping component 12 to release the button and fabric. After opening the clamping component 12, the thread-cutting knife component 22 closes to complete the thread cutting.

[0094] In summary, the signal sent by the control system 30 to the telescopic drive 112 is the command to release the button, and the signal sent to the lifting and cutting drive 218 is the command to lift the presser foot 121. The timing of the signals sent by the control system 30 to the telescopic drive 112 and the lifting and cutting drive 218 can be controlled independently. Since the length of the thread left on the fabric is determined by the height the button is lifted when the cutting blade assembly 22 is closed, it can be known that the smaller the height the button is lifted, the shorter the thread left on the fabric. Therefore, by setting the timing of the signals sent by the control system 30 to the telescopic drive 112 and the lifting and cutting drive 218 through the main control parameters, the button can be released at a preset position or preset time point during the process from the start to the end of lifting. This allows for free control of the length of the thread left on the fabric within a certain length range.

[0095] Please refer to the following: Figure 7 The control method for a button-attaching machine provided in this application is applied to the button-attaching machine described in the above specific embodiments; the control method for the button-attaching machine includes:

[0096] After the button is sewn onto the fabric, the control system 30 controls the lifting and cutting drive assembly 21 of the lifting and cutting mechanism 20 to start performing the actions of lifting the clamping assembly 12 of the button clamping mechanism 10 and closing the cutting knife assembly 22 of the lifting and cutting mechanism 20.

[0097] When the clamping assembly 12 is in a preset position or at a preset time point before being raised to the highest position, the control system 30 controls the clamping drive assembly 11 of the button clamping mechanism 10 to open the clamping assembly 12 to release the button and the fabric.

[0098] After opening the clamp assembly 12, close the wire cutter assembly 22 to complete the wire cutting.

[0099] In other words, after sewing is completed, the main spindle motor sends a signal to the control system 30. The control system 30 receives the signal and sends a signal to the telescopic drive component 112 and the lifting and pressing thread-cutting drive component 218. The control system 30 controls the lifting and pressing thread-cutting drive component 21 to start lifting the clamping component 12 and closing the thread-cutting knife component 22. When the clamping component 12 is at a preset position or preset time point before being raised to the highest position, the control system 30 controls the button clamping drive component 11 to open the clamping component 12 to release the button and fabric. After opening the clamping component 12, the thread-cutting knife component 22 closes to complete the thread cutting.

[0100] In this way, the application can freely control the length of the thread ends to be cut, freeing workers from the work of cutting the thread ends after sewing, making the stitches more beautiful and improving worker efficiency.

[0101] Before the step of controlling the lifting and cutting drive assembly 21 of the lifting and cutting mechanism 20 via the control system 30 to begin executing the actions of lifting the clamping assembly 12 of the clamping mechanism 10 and closing the cutting blade assembly 22 of the lifting and cutting mechanism 20, the following steps are included:

[0102] After obtaining the first control signal, the control system 30 controls the lifting and cutting drive assembly 21 of the lifting and cutting mechanism 20 to lift the clamp assembly 12 of the clamp mechanism 10 and close the cutting knife assembly 22 of the lifting and cutting mechanism 20, and controls the clamp drive assembly 11 of the clamp mechanism 10 to open the clamp assembly 12.

[0103] After obtaining the second control signal, the control system 30 controls the button clamp drive assembly 11 to close the clamp assembly 12 to clamp the button, and controls the lifting and pressing wire cutting drive assembly 21 to lower the clamp assembly 12 and open the wire cutting knife assembly 22.

[0104] After the clamping assembly 12 presses the fabric tight, the button is sewn onto the fabric.

[0105] It should be noted that the first control signal mentioned above can be obtained by the worker stepping on the pedal with the toes, and the second control signal can be obtained by the worker stepping on the pedal with the heels.

[0106] Specifically, the sewing process is as follows: the worker steps on the foot pedal with their toes, and the foot pedal sends a signal to the control system 30 to lift the presser foot 121; the control system 30 receives the signal from the foot pedal and sends a signal to the telescopic drive 112 and the presser foot thread cutter 218; then the presser foot 121 is lifted, the moving and fixed blades close, and after both presser feet 121 are opened, the worker inserts the button into the two presser feet 121 and steps on the foot pedal with their heel; the control system 30 receives the command from the foot pedal and sends a signal to the telescopic drive 112, which pushes the button clamp assembly to clamp the button. Then, the control system 30 sends a signal to the lifting and pressing thread-cutting drive 218, the presser foot 121 is lowered, and after pressing the fabric, the main spindle motor starts to rotate a certain number of times. After sewing is completed, the main spindle motor sends a signal to the control system 30. The control system 30 sends signals to the lifting and pressing thread-cutting drive 218 and the telescopic drive 112 at preset time intervals, so that the clamping assembly 12 is opened at a preset position or preset time point before the clamping assembly 12 is raised to the highest position, and finally the thread is cut. In this way, the left thread ends meet the user's preset requirements.

[0107] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0108] The button-attaching machine and its control method provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A button sewing machine characterized by comprising: The button clamp mechanism comprises a button clamp driving assembly and a clamp assembly, the button clamp driving assembly is connected with the clamp assembly to drive the clamp assembly to open and close, the clamp assembly is used to clamp a button and to press the cloth; The lift and press cutting thread mechanism comprises a lift and press cutting thread driving assembly and a cutting thread knife assembly, the lift and press cutting thread driving assembly is connected with the button clamp mechanism to drive the clamp assembly to lift and drop, and the lift and press cutting thread driving assembly is connected with the cutting thread knife assembly to drive the cutting thread knife assembly to open and close; The control system is connected in communication with the button clamp driving assembly and the lift and press cutting thread driving assembly to control the button clamp driving assembly and the lift and press cutting thread driving assembly to work, so that the clamp assembly is opened at a preset position or a preset time point before being lifted to the highest position, and the cutting thread knife assembly is closed to complete the cutting thread after the clamp assembly is opened. The button clamp driving assembly comprises:

2. The button sewing machine according to claim 1, wherein A button clamp linkage assembly connected with the clamp assembly; A telescopic driving member connected with the button clamp linkage assembly to provide power to drive the button clamp linkage assembly to open and close the clamp assembly. The button clamp mechanism further comprises a button clamp seat, and the telescopic driving member is fixed on the button clamp seat.

3. The button sewing machine according to claim 2, wherein The button clamp linkage assembly comprises: A rod end joint bearing installed on the telescopic end of the telescopic driving member; A button clamp driving rod rotatably arranged on the button clamp seat, and one end of the button clamp driving rod is rotatably connected with the rod end joint bearing; A button clamp connecting rod rotatably connected with the other end of the button clamp driving rod; A button clamp piece connected with the button clamp connecting rod and the clamp assembly to drive the clamp assembly to open and close. The button clamp mechanism further comprises a button clamp lifting hook fixed on the button clamp seat.

4. The button sewing machine according to claim 3, wherein The lift and press cutting thread driving assembly comprises: A lifting hook matched with the button clamp lifting hook to drive the button clamp lifting hook to lift; A lift and press swing rod swingably arranged on the machine shell and connected with the lifting hook; A lift and press connecting rod, one end of the lift and press connecting rod is rotatably connected with one end of the lift and press swing rod away from the lifting hook; A support connecting rod rotatably arranged on the machine shell, a first end of the support connecting rod is rotatably connected with the other end of the lift and press connecting rod; A cutting thread connecting rod, one end of the cutting thread connecting rod is rotatably connected with a second end of the support connecting rod; A lift and cut crank rotatably arranged on the machine shell, one end of the lift and cut crank is rotatably connected with the other end of the cutting thread connecting rod; A lift and cut cam abutting against the other end of the lift and cut crank; A lift and press cutting thread driving member connected with the lift and cut cam to provide power to drive the lift and cut cam to rotate. The lift and cut crank is in V shape, a ball is arranged on one end of the lift and cut crank away from the cutting thread connecting rod, and the ball is tightly attached to the lift and cut cam.

5. The button sewing machine according to claim 4, wherein ​ 6. The button sewing machine according to claim 4, wherein The presser thread trimming mechanism further comprises a needle plate assembly, and the thread trimming cutter assembly comprises a thread trimming fixed cutter and a thread trimming movable cutter, wherein the thread trimming fixed cutter is fixed to the back of the needle plate assembly, and the thread trimming movable cutter is rotatably arranged on the back of the needle plate assembly; The presser thread trimming driving assembly further comprises a movable cutter driving link, one end of the movable cutter driving link is rotatably connected with the third end of the support link, and the other end of the movable cutter driving link is rotatably connected with the thread trimming movable cutter, so as to drive the thread trimming movable cutter to rotate relative to the thread trimming fixed cutter.

7. The button sewing machine according to claim 4, wherein The machine shell comprises: a lower shell section for mounting the button holder, the control system and the support link; an upper shell section connected with the lower shell section for mounting the presser thread trimming driving member, the presser lifting rod and the presser lifting crank.

8. The button sewing machine according to any one of claims 1 to 7, wherein The button sewing machine further comprises a user operation module, which is connected in communication with the control system, so as to realize the transmission of the user operation instructions received by the user operation module to the control system.

9. The button sewing machine according to claim 8, wherein The control system comprises: a receiving module connected in communication with the user operation module for receiving the user operation instructions transmitted by the user operation module; a control module connected in communication with the receiving module for transmitting control signals to the button holder driving assembly and the presser thread trimming driving assembly.

10. A control method of a button sewing machine, characterized by, The control method is applied to the button sewing machine as claimed in any one of claims 1-9, and the control method comprises: after the button is sewn on the cloth, the presser thread trimming driving assembly of the presser thread trimming mechanism is controlled by the control system to start the action of lifting the clamping assembly of the button holder mechanism and closing the thread trimming cutter assembly of the presser thread trimming mechanism; when the clamping assembly is at a preset position or a preset time point before being lifted to the highest position, the clamping assembly is opened by the button holder driving assembly of the button holder mechanism controlled by the control system, so as to release the button and the cloth; after the clamping assembly is opened, the thread trimming cutter assembly is closed to complete the thread trimming.

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