Automatic bone alignment suturing method

Abstract

The present invention provides an automatic bone alignment sewing method, which is equipped with a double-piece seaming system. The double-piece seaming system includes an electronic control module, an equipment frame, a bone position detection mechanism, a bone position adjustment mechanism, a sewing table, and a sewing machine. The bone position detection mechanism includes an upper bone position detection sensor and a lower bone position detection sensor arranged in a vertical direction. The bone position adjustment mechanism includes an upper bone position adjustment drive source, an upper clamping assembly connected to the upper bone position adjustment drive source, a lower bone position adjustment drive source, and a lower clamping assembly connected to the lower bone position adjustment drive source. After loading, the sewing machine starts sewing. When the upper bone position detection sensor and the lower bone position detection sensor both detect bone position, the sewing machine stops. The electronic control module controls the upper bone position adjustment drive source and / or the lower bone position adjustment drive source to operate until both the upper bone position detection sensor and the lower bone position detection sensor are triggered. The sewing machine continues sewing. The present invention realizes automatic, rapid, and accurate bone alignment when sewing double pieces, thereby improving the quality and efficiency of double piece seaming.

Description

Technical Field

[0001] The invention relates to the technical field of sewing equipment, in particular to an automatic bone alignment sewing method. Background Art

[0002] The sewing process of ready-made garments such as T-shirts and sweatshirts involves the stitching of front and back pieces. The front and back pieces themselves are made by stitching together pieces from multiple locations, so they have seams from the previous sewing and splicing process. This creates an area where the front and back pieces are thicker than the rest of the fabric at the joint. This area is called the bone, meaning the front and back pieces are thicker at the bone. In order to ensure the comfort of the garment, there are specific requirements for the bone alignment of the front and back pieces at the cuffs. It is necessary to ensure that the bone alignment of the front and back pieces at the cuffs is strictly aligned. This step is called bone alignment, or simply bone alignment.

[0003] Currently, the bone alignment of front and back fabric panels is mainly based on manual observation and adjustment. This is called manual bone alignment. The front and back fabric panels are manually aligned before sewing. This results in unreliable bone alignment accuracy, lack of stability, and poor adaptability to different fabric panels. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an automatic bone alignment suturing method capable of automatic bone alignment.

[0005] To achieve the above object, the present invention provides an automatic bone alignment method, comprising the following steps:

[0006] S1. Configuring a double-piece stitching system, the double-piece stitching system comprising an electronic control module, a fixed equipment frame, a bone position detection mechanism and a bone position adjustment mechanism both mounted on the equipment frame, a sewing table fixed to the equipment frame, and a sewing machine mounted on the equipment frame, wherein the bone position adjustment mechanism, the bone position detection mechanism, and the sewing machine are sequentially arranged along the feeding direction of the front and back fabric panels;

[0007] The bone position detection mechanism includes a detection component bracket, and an upper bone position detection sensor and a lower bone position detection sensor arranged in an upper and lower direction, and the upper bone position detection sensor and the lower bone position detection sensor are both installed on the detection component bracket; the bone position adjustment mechanism includes an upper bone position adjustment drive source, an upper clamping component transmission-connected to the upper bone position adjustment drive source, a lower bone position adjustment drive source, and a lower clamping component transmission-connected to the lower bone position adjustment drive source; the upper bone position detection sensor, the lower bone position detection sensor, the upper bone position adjustment drive source, and the lower bone position adjustment drive source are all communicatively connected to the electronic control module;

[0008] S2, loading the front and back pieces of fabric onto the sewing table;

[0009] S3, the sewing machine starts sewing, and the front and back pieces of fabric move forward;

[0010] S4, when the upper bone position detection sensor detects the bone position of the front cloth piece, and the lower bone position detection sensor detects the bone position of the back cloth piece, the electronic control module controls the sewing machine to stop;

[0011] S5, the electronic control module controls the upper bone position adjustment driving source and / or the lower bone position adjustment driving source to operate until the upper bone position detection sensor detects the bone position of the front piece of cloth, and the lower bone position detection sensor detects the bone position of the back piece of cloth;

[0012] S6. The sewing machine continues sewing.

[0013] Furthermore, the bone position adjustment mechanism further includes a movable support bracket and a movable drive source mounted on the movable support bracket, the detection component bracket is mounted on the movable support bracket so as to be movable forward and backward, the movable drive source is in transmission connection with the detection component bracket and is in communication connection with the electronic control module;

[0014] The step S5 is:

[0015] The electric control module controls the movement of the mobile drive source, which drives the detection component bracket to move forward until any one of the upper bone position detection sensor and the lower bone position detection sensor is triggered. The electric control module controls the mobile drive source to stop moving and controls the movement of the upper bone position adjustment drive source or the lower bone position adjustment drive source according to the triggering status of the upper bone position detection sensor and the lower bone position detection sensor:

[0016] When the upper bone position detection sensor is triggered first, the electric control module controls the lower bone position adjustment drive source to move, and the lower bone position adjustment drive source drives the lower clamping assembly and the rear cloth piece clamped by it to move backward until the lower bone position detection sensor is triggered;

[0017] When the lower bone position detection sensor is triggered first, the electric control module controls the upper bone position adjustment drive source to move, and the upper bone position adjustment drive source drives the upper clamping assembly and the front cloth piece clamped by it to move backward until the upper bone position detection sensor is triggered.

[0018] Furthermore, the bone position detection mechanism also includes an upper swing rod and a lower swing rod both of which are rotatably mounted on the detection component bracket, an upper detection plunger mounted on one end of the upper swing rod, a lower detection plunger mounted on one end of the lower swing rod, and a middle partition fixed to the detection component bracket, the upper detection plunger and the lower detection plunger are distributed on the upper and lower sides of the middle partition, and are directly opposite to each other up and down, an upper feeding channel for allowing the front piece of cloth to pass through is formed between the lower end of the upper detection plunger and the middle partition, a lower feeding channel for allowing the rear piece of cloth to pass through is formed between the upper end of the lower detection plunger and the middle partition, the upper bone position detection sensor is aligned with the other end of the upper swing rod, and the lower bone position detection sensor is aligned with the other end of the lower swing rod.

[0019] Furthermore, the bone position detection mechanism further comprises a pre-sensing plunger, the pre-sensing plunger being mounted on one end of the upper swing rod, the pre-sensing plunger and the upper detection plunger being distributed in sequence along the feeding direction of the front and rear cloth pieces;

[0020] The step S4 includes the following sub-steps in sequence:

[0021] S41: During the forward movement of the front and rear fabric pieces, the bone position on the front fabric piece pre-lifts the pre-sensing plunger, and the upper bone position detection sensor is triggered;

[0022] S42, the electronic control module controls the sewing machine to slow down and sew;

[0023] S43: The front and rear cloth pieces continue to move forward, and the bone position on the rear cloth piece pushes down against the lower detection plunger, triggering the lower bone position detection sensor;

[0024] S44: The front and rear cloth pieces continue to move forward, and when neither the upper bone position detection sensor nor the lower bone position detection sensor is triggered, the electronic control module controls the sewing machine to stop.

[0025] Furthermore, the bone position adjustment mechanism also includes a feeding motor and a feeding base, the feeding motor is in transmission connection with the feeding base to drive the feeding base to move forward and backward, the upper bone position adjustment drive source and the lower bone position adjustment drive source are both installed on the feeding base, and the feeding motor is in communication connection with the electronic control module;

[0026] During the sewing process of the sewing machine, the electronic control module controls the operation of the feeding motor, drives the feeding base to move forward, and causes the upper clamping assembly and the lower clamping assembly to clamp the front piece of cloth and the back piece of cloth respectively and move forward. The forward movement speed of the feeding base matches the feeding speed of the sewing machine.

[0027] Furthermore, the bone position detection mechanism also includes an avoidance unit, which includes a fixed avoidance mounting plate and an avoidance drive source installed on the avoidance mounting plate. The avoidance drive source is in transmission connection with the movable support bracket to drive the movable support bracket to move toward or away from the seam platform. The avoidance drive source is in communication connection with the electronic control module.

[0028] When the upper clamping assembly and the lower clamping assembly move to the bone position detection mechanism, the electric control module controls the avoidance drive source to move so that the movable support bracket moves away from the sewing platform.

[0029] As described above, the automatic bone alignment suturing method according to the present invention has the following beneficial effects:

[0030] The present invention detects the bone positions on the front and back pieces of fabric through a bone position detection mechanism, and then combines with a bone position adjustment mechanism to drive the front and back pieces of fabric to move forward and backward respectively, so that the bone positions of the front and back pieces of fabric are strictly aligned, thereby achieving automatic, rapid and accurate bone alignment when the two pieces are spliced ​​together, reliably ensuring the bone alignment accuracy, and effectively improving the quality and efficiency of the two-piece splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a flow chart of the automatic bone alignment method in this application.

[0032] Figure 2 This is a schematic diagram of the structure of the double-piece seam system in this application.

[0033] Figure 3 This is a structural diagram of the bone position detection mechanism in this application.

[0034] Figure 4 and Figure 5 for Figure 3 Schematic diagram of the structure in different states after omitting the detection point moving unit and avoidance unit.

[0035] Figure 6 for Figure 3 Schematic diagram of the connection between the upper swing arm, upper detection plunger and pre-sensing plunger.

[0036] Figure 7 for Figure 3 Schematic diagram of the connection between the middle lower swing rod and the lower detection plunger.

[0037] Figure 8 for Figure 3 Schematic diagram of the structure of the detection point moving unit and the avoidance unit.

[0038] Figure 9 and Figure 10 Schematic diagram of the structure of the bone position adjustment mechanism in this application at different viewing angles.

[0039] Figure 11 This is a schematic diagram of the connection between the upper bone position adjustment drive source, the upper correction unit and the upper clamping assembly in this application.

[0040] Figure 12 This is a schematic diagram of the connection between the lower bone position adjustment drive source, the lower correction unit and the lower clamping assembly in this application.

[0041] Figure 13 a to Figure 13 d is a schematic diagram showing the relationship between the bone position on the front piece of cloth and the upper bone position detection sensor during the bone alignment process.

[0042] Component number description

[0043] 101 Bone Position Detection Agency

[0044] 102 Bone Position Adjustment Mechanism

[0045] 103 equipment racks

[0046] 104 Sewing Table

[0047] 105 sewing machine

[0048] 20 detection units

[0049] 21 Detection component bracket

[0050] 22 Upper bone position detection sensor

[0051] 23 Lower bone position detection sensor

[0052] 24 Backswing

[0053] 241 First mounting arm

[0054] 242 Second mounting arm

[0055] 25 Downswing

[0056] 26 Upper detection plunger

[0057] 27 Lower detection plunger

[0058] 28 Middle partition

[0059] 29 Upper ejector bracket

[0060] 210 lower push rod bracket

[0061] 211 upper ejector assembly

[0062] 212 lower ejector assembly

[0063] 213 upper block

[0064] 214 lower top block

[0065] 215 Upper sensor mounting plate

[0066] 216 Lower sensor mounting plate

[0067] 217 First installation adjustment slot

[0068] 218 Pre-sensing plunger

[0069] 219 Second installation adjustment slot

[0070] 220 Contour Screws

[0071] 221 plunger fixing block

[0072] 30 detection point moving unit

[0073] 31 Mobile support bracket

[0074] 32 mobile drive source

[0075] 33 Nut connecting bracket

[0076] 34 Origin detection sensor

[0077] 35 origin sensor

[0078] 36 First guide rail slider mechanism

[0079] 40 avoidance units

[0080] 41 Avoid mounting plate

[0081] 42 Avoidance drive source

[0082] 43 Avoidance connection bracket

[0083] 44 Limit mounting bracket

[0084] 45 limit screw

[0085] 46 buffer body

[0086] 47 Second guide rail slider mechanism

[0087] 50 feeding moving unit

[0088] 51 Feeding base

[0089] 52 Third guide rail slider mechanism

[0090] 60 Upper bone adjustment unit

[0091] 61 Upper bone position adjustment drive source

[0092] 62 Upper clamping assembly

[0093] 63 First nut connecting plate

[0094] 64 Upper deviation correction mounting plate

[0095] 65 Upper deviation correction motor

[0096] 66 Upper deviation correcting gear

[0097] 67 Upper deviation-correcting rack

[0098] 68 First motor connection seat

[0099] 69 Upper micro switch

[0100] 610 splint fixing block

[0101] 70 Lower bone adjustment unit

[0102] 71 Lower bone position adjustment drive source

[0103] 72 lower clamping assembly

[0104] 73 Lower guide plate

[0105] 74 Lower correction motor

[0106] 75 Lower deviation correcting gear

[0107] 76 Lower guiding rack

[0108] 77 Second motor connection seat

[0109] 78 Second nut connecting plate

[0110] 79 Lower micro switch

[0111] 81 Upper splint

[0112] 82 Lower splint

[0113] 83 Opening and closing drive source DETAILED DESCRIPTION

[0114] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0115] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0116] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0117] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0118] The present application provides a method for automatically suturing bone positions, such as Figure 1 As shown, the automatic bone alignment suturing method includes the following steps.

[0119] Step S1: Configure a double-piece seaming system, which is used to complete the seaming of the front and back pieces. Figure 2 As shown, the double-piece seaming system includes an electronic control module, a fixed equipment frame 103, a bone position detection mechanism 101 and a bone position adjustment mechanism 102 both installed on the equipment frame 103, a sewing table 104 fixed on the equipment frame 103, and a sewing machine 105 installed on the equipment frame 103. The bone position adjustment mechanism 102, the bone position detection mechanism 101 and the sewing machine 105 are distributed in sequence along the feeding direction of the front and back pieces of cloth. The electronic control module, the bone position detection mechanism 101 and the bone position adjustment mechanism 102 constitute a double-piece seaming bone alignment device.

[0120] For ease of description, in the following embodiments, the various directions are defined as follows: the direction of movement of the front and rear fabric pieces during sewing is defined as the forward direction, which is also the feeding direction of the front and rear fabric pieces; the stacking direction of the front and rear fabric pieces is defined as the up-down direction, and in this embodiment, the front fabric piece is on top and the rear fabric piece is on the bottom; the direction orthogonal to both the forward-backward direction and the up-down direction is defined as the left-right direction. Therefore, the bone position adjustment mechanism 102, the bone position detection mechanism 101, and the sewing machine 105 are arranged in sequence from back to front and are all located on the right edge of the sewing platform 104. In addition, in this embodiment, the sewing machine 105 is an overlock sewing machine.

[0121] like Figure 3 As shown, the bone position detection mechanism 101 includes a detection component bracket 21, and an upper bone position detection sensor 22 and a lower bone position detection sensor 23 arranged in a vertical direction. The upper bone position detection sensor 22 and the lower bone position detection sensor 23 are both installed on the detection component bracket 21; when the upper bone position detection sensor 22 detects a bone position on the front piece of cloth, the upper bone position detection sensor 22 is triggered; when the lower bone position detection sensor 23 detects a bone position on the back piece of cloth, the lower bone position detection sensor 23 is triggered. Figure 9 and Figure 10 As shown, the bone position adjustment mechanism 102 includes an upper bone position adjustment drive source 61, an upper clamping assembly 62 transmission-connected to the upper bone position adjustment drive source 61, a lower bone position adjustment drive source 71, and a lower clamping assembly 72 transmission-connected to the lower bone position adjustment drive source 71. The upper bone position adjustment drive source 61 drives the upper clamping assembly 62 and the front fabric piece clamped by the upper clamping assembly 62 to move forward and backward, while the lower bone position adjustment drive source 71 drives the lower clamping assembly 72 and the rear fabric piece clamped by the lower clamping assembly 72 to move forward and backward. The upper bone position detection sensor 22, the lower bone position detection sensor 23, the upper bone position adjustment drive source 61, and the lower bone position adjustment drive source 71 are all communicatively connected to the electronic control module.

[0122] Step S2: Load the front and back fabric pieces onto the sewing station 104.

[0123] Step S3: The sewing machine 105 starts sewing, and the front and back pieces of fabric move forward.

[0124] Step S4: When the upper bone position detection sensor 22 detects the bone position of the front piece of cloth, and the lower bone position detection sensor 23 detects the bone position of the back piece of cloth, both the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are triggered, and the electronic control module controls the sewing machine 105 to stop.

[0125] Step S5, the electronic control module controls the upper bone position adjustment drive source 61 and / or the lower bone position adjustment drive source 71 to adjust the front and rear positions of the front and / or rear cloth pieces, that is, adjust the front and rear positions of the bones on each cloth piece, until the upper bone position detection sensor 22 detects the bone position of the front cloth piece, and the lower bone position detection sensor 23 detects the bone position of the rear cloth piece, thereby achieving alignment of the bone position of the front cloth piece and the bone position of the rear cloth piece, and completing automatic bone alignment.

[0126] Step S6: The sewing machine 105 continues sewing.

[0127] Therefore, the present invention detects the bone positions on the front piece of fabric and the bone positions on the back piece of fabric respectively through the upper bone position detection sensor 22 and the lower bone position detection sensor 23; drives the upper clamping assembly 62 and the front piece of fabric clamped by the upper clamping assembly 62 to move forward and backward through the upper bone position adjustment driving source 61 to adjust the front and back positions of the bone positions on the front piece of fabric; drives the lower clamping assembly 72 and the back piece of fabric clamped by the lower clamping assembly 72 to move forward and backward through the lower bone position adjustment driving source 71 to adjust the front and back positions of the bone positions on the back piece of fabric. The electronic control module controls the actions of the upper bone position adjustment driving source 61 and the lower bone position adjustment driving source 71 according to the triggering conditions of the upper bone position detection sensor 22 and the lower bone position detection sensor 23, strictly aligns the bone positions of the front piece of fabric with the bone positions of the back piece of fabric, realizes automatic, rapid and accurate bone alignment when the two pieces are stitched together, reliably ensures the bone alignment accuracy, and effectively improves the quality and efficiency of the stitching of the two pieces.

[0128] Furthermore, if Figure 2 As shown, the bone position detection mechanism 101 and the bone position adjustment mechanism 102 are two independent modules, each mounted on an equipment frame 103. The bone position detection mechanism 101 is an adaptive bone position detection mechanism that can adapt to the bone positions on the front and back fabric pieces, that is, it can automatically locate the bone positions on the front and back fabric pieces. The bone position adjustment mechanism 102 is an adaptive bone position adjustment mechanism that can adjust the front and back positions of the bones on the front and back fabric pieces. Furthermore, the bone position adjustment mechanism 102 is mounted on the equipment frame 103 so that it can move forward and backward. Therefore, in addition to adjusting the bone positions of the front and back fabric pieces, the bone position adjustment mechanism 102 is also used to feed the front and back fabric pieces forward.

[0129] The following describes the preferred structures of the bone position detection mechanism 101 and the bone position adjustment mechanism 102.

[0130] Bone Position Detection Mechanism 101

[0131] like Figure 3As shown, the bone position detection mechanism 101 includes a detection unit 20, a detection point moving unit 30 and an avoidance unit 40. The detection unit 20 is installed on the detection point moving unit 30. The detection point moving unit 30 drives the detection unit 20 to move forward and backward to find the bone positions on the front and back pieces of cloth; the detection point moving unit 30 is installed on the avoidance unit 40. The avoidance unit 40 drives the detection point moving unit 30 and the detection unit 20 to move left and right, so that the detection point moving unit 30 and the detection unit 20 are close to or away from the sewing platform 104.

[0132] like Figures 4 to 7 As shown, in addition to the above-mentioned detection component bracket 21, the upper bone position detection sensor 22 and the lower bone position detection sensor 23, the detection unit 20 also includes an upper swing rod 24 and a lower swing rod 25 both extending straight left and right, an upper detection plunger 26 installed at the left end of the upper swing rod 24, a lower detection plunger 27 installed at the left end of the lower swing rod 25, and a middle partition 28 fixed to the detection component bracket 21; the upper swing rod 24 and the lower swing rod 25 are distributed up and down, the middle position of the upper swing rod 24 is rotatably mounted on the detection component bracket 21 by the equal height screw 220 extending forward and backward, and the middle position of the lower swing rod 25 is rotatably mounted on the detection component bracket 21 by the equal height screw 220 extending forward and backward; the middle A partition 28 is located on the left side of the detection assembly bracket 21 and between the upper swing arm 24 and the lower swing arm 25, so that the upper detection plunger 26 and the lower detection plunger 27 are located on the upper and lower sides of the middle partition 28, and the upper detection plunger 26 and the lower detection plunger 27 are directly opposite each other. That is, the upper detection plunger 26 and the lower detection plunger 27 are separated by the middle partition 28. An upper feeding channel for the front piece of fabric is formed between the lower end of the upper detection plunger 26 and the middle partition 28, and a lower feeding channel for the rear piece of fabric is formed between the upper end of the lower detection plunger 27 and the middle partition 28. The upper bone position detection sensor 22 is aligned with the right end of the upper swing arm 24, and the lower bone position detection sensor 23 is aligned with the right end of the lower swing arm 25. Preferably, both the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are diffuse reflection sensors.

[0133] The principle of the detection unit 20 for detecting the bone position on the front and back pieces of fabric is as follows: during the sewing process of the overlock sewing machine, the upper swing rod 24 and the lower swing rod 25 are both in a horizontal state, the upper feeding channel is slightly larger than the thickness of the front piece of fabric, but smaller than the thickness of the bone position on the front piece of fabric, and the lower feeding channel is slightly larger than the thickness of the back piece of fabric, but smaller than the thickness of the bone position on the back piece of fabric. The upper bone position detection sensor 22 and the lower bone position detection sensor 23 are both distance sensors. When the bone position on the front piece of fabric and the bone position on the back piece of fabric do not pass forward beyond the detection unit 20, as Figure 3As shown, the upper swing rod 24 and the lower swing rod 25 remain in a horizontal state. At this time, the distance between the upper bone position detection sensor 22 and the right end of the upper swing rod 24 has not changed, and the upper bone position detection sensor 22 is not triggered, so the upper bone position detection sensor 22 has no signal output; the distance between the lower bone position detection sensor 23 and the right end of the lower swing rod 25 has not changed, and the lower bone position detection sensor 23 is not triggered, so the lower bone position detection sensor 23 has no signal output. When the bone on the front piece of cloth reaches the upper detection plunger 26, the bone on the front piece of cloth pushes up the detection plunger 26, driving the upper swing rod 24 to rotate clockwise through an angle, as shown in FIG. Figure 4 As shown, the distance between the upper bone position detection sensor 22 and the right end of the upper swing rod 24 changes, the upper bone position detection sensor 22 is triggered, and a signal is output. The electronic control module thus determines that the upper bone position detection sensor 22 has detected the bone position on the front piece of fabric. Similarly, when the bone position on the rear piece of fabric reaches the lower detection plunger 27, the bone position on the rear piece of fabric pushes down the lower detection plunger 27, driving the lower swing rod 25 to rotate counterclockwise through an angle, as shown in FIG. Figure 4 As shown, the distance between the lower bone position detection sensor 23 and the right end of the lower swing rod 25 changes, the lower bone position detection sensor 23 is triggered, and a signal is output. The electronic control module thus determines that the lower bone position detection sensor 23 detects the bone position on the back piece of cloth.

[0134] Of course, in other embodiments, the upper bone position detection sensor 22 and the lower bone position detection sensor 23 can directly use thickness sensors, directly align with the front and back pieces of cloth, and detect the bone positions on the front and back pieces of cloth through changes in thickness.

[0135] Furthermore, if Figure 5 and Figure 6 As shown, the detection unit 20 also includes an upper push rod bracket 29 fixed to the upper end of the detection component bracket 21, a lower push rod bracket 210 fixed to the lower end of the detection component bracket 21, an upper push rod assembly 211 installed on the upper push rod bracket 29, and a lower push rod assembly 212 installed on the lower push rod bracket 210; the upper push rod bracket 29 is distributed on the upper side of the right section of the upper swing rod 24, and the lower push rod bracket 210 is distributed on the lower side of the right section of the lower swing rod 25; the upper push rod assembly 211 includes a cylinder and an upper push block 213 installed at the lower end of the cylinder piston rod, and the upper push block 213 abuts against the upper side of the upper swing rod 24; the lower push rod assembly 212 includes a cylinder and a lower push block 214 installed at the upper end of the cylinder piston rod, and the lower push block 214 abuts against the lower side of the lower swing rod 25. When the piston rod of the cylinder of the upper push rod assembly 211 does not extend downward, as shown Figure 4 As shown, the upper rocker 24 is in a horizontal state by the contact between the upper block 213 and the upper rocker 24; when the piston rod of the cylinder of the lower rocker assembly 212 does not extend upward, as shown in FIG. Figure 4As shown, the lower push rod 25 is in a horizontal state by the contact between the lower push rod 214 and the lower push rod 25. The cylinder of the upper push rod assembly 211 is actuated, and its piston rod extends downward, as shown in FIG. Figure 5 As shown, the downward movement of the upper push block 213 drives the upper swing rod 24 to rotate clockwise, and the left end of the upper swing rod 24 moves up and opens, making it easier for the front piece of cloth to enter the feeding channel when loading. Similarly, the cylinder of the lower push rod assembly 212 is activated, and its piston rod extends upward, as shown in FIG. Figure 5 As shown, the upward movement of the lower top block 214 drives the lower swing rod 25 to rotate counterclockwise, and the left end of the lower swing rod 25 moves downward and opens, making it easier for the rear piece of cloth to enter the lower feeding channel during loading.

[0136] Preferably, the weight of the left end of the upper swing arm 24, on which the upper detection plunger 26 is mounted, is greater than the weight of the right end of the upper swing arm 24, and the weight of the left end of the lower swing arm 25, on which the lower detection plunger 27 is mounted, is less than the weight of the right end of the lower swing arm 25. This can be achieved by installing counterweights on the left end of the upper swing arm 24 and the right end of the lower swing arm 25. Thus, after the front and rear fabric panels are loaded, the cylinders of the upper push rod assembly 211 and the lower push rod assembly 212 are each reset. The upper swing arm 24 swings counterclockwise under the action of its gravity, returns to a horizontal position, and closes. The lower swing arm 25 swings clockwise under the action of its gravity, returns to a horizontal position, and closes. This application uses the upper push rod assembly 211 and the lower push rod assembly 212 to drive the upper and lower swing arms 24, 25 to open, and the gravity of the upper and lower swing arms 24, 25 drives the upper and lower swing arms 24, 25 to close. The structure is simple and easy to implement.

[0137] Furthermore, the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are respectively installed on the right ends of the upper push rod bracket 29 and the lower push rod bracket 210. The specific structure is as follows: Figure 4 and Figure 5 As shown, the right end of the upper push rod bracket 29 is fixed with the upper sensor mounting plate 215 by screws, and the right end of the lower push rod bracket 210 is fixed with the lower sensor mounting plate 216 by screws. The upper sensor mounting plate 215 and the lower sensor mounting plate 216 are both provided with a first mounting adjustment groove 217, and the first mounting adjustment groove 217 is an arc groove; the upper bone position detection sensor 22 is installed on the upper sensor mounting plate 215 by a fixing screw passing through the first mounting adjustment groove 217 of the upper sensor mounting plate 215, and the lower bone position detection sensor 23 is installed on the lower sensor mounting plate 216 by a fixing screw passing through the first mounting adjustment groove 217 of the lower sensor mounting plate 216, thereby realizing the installation of the upper bone position detection sensor 22 and the lower bone position detection sensor 23, and at the same time, the installation position of the upper bone position detection sensor 22 and the lower bone position detection sensor 23 can be adjusted to ensure the accuracy of bone position detection.

[0138] Furthermore, if Figures 4 to 6As shown, the detection unit 20 also includes a pre-sensing plunger 218, which is installed at the left end of the upper swing rod 24. The pre-sensing plunger 218 and the upper detection plunger 26 are arranged in sequence along the feeding direction of the front fabric piece, that is, the pre-sensing plunger 218 is arranged directly behind the upper detection plunger 26. The above-mentioned step S4 includes the following sub-steps in sequence:

[0139] Step S41: During the forward movement of the front and back fabric pieces during sewing, the pre-sensing plunger 218 contacts the bone position of the front fabric piece before the upper detection plunger 26. The bone position on the front fabric piece then pushes up the pre-sensing plunger 218, causing the upper swing rod 24 to rotate clockwise by a certain angle, thereby triggering the upper bone position detection sensor 22.

[0140] Step S42: the electronic control module controls the sewing machine 105 to slow down and sew;

[0141] Step S43: The front and rear cloth pieces continue to move forward, and the bone position on the rear cloth piece pushes against the lower detection plunger 27, and the lower bone position detection sensor 23 is triggered;

[0142] Step S44: The front and rear fabric pieces continue to move forward. When neither the upper bone position detection sensor 22 nor the lower bone position detection sensor 23 is triggered, it indicates that the bone position of the front fabric piece has moved forward past the upper bone position detection sensor 22, and the bone position of the rear fabric piece has moved forward past the lower bone position detection sensor 23. The electronic control module then controls the sewing machine 105 to stop. In this way, by providing the pre-sensing plunger 218, the deceleration time of the overlock sewing machine can be reduced after both the upper bone position detection sensor 22 and the lower bone position detection sensor 23 detect the bone position. This also reduces the forward movement distance of the front and rear fabric pieces when the overlock sewing machine decelerates, thereby preventing the stitches from being affected by the sudden stop of the overlock sewing machine.

[0143] Furthermore, if Figure 6 and Figure 7As shown, the left end of the upper swing rod 24 is provided with a U-shaped mounting portion, and the U-shaped mounting portion has a first mounting arm 241 and a second mounting arm 242 distributed in sequence along the feeding direction of the front cloth piece. The first mounting arm 241, the second mounting arm 242 and the left end of the lower swing rod 25 are all provided with a second mounting adjustment slot 219 extending straight left and right. The pre-sensing plunger 218 is mounted on the first mounting arm 241 by a fixing screw passing through the second mounting adjustment slot 219 of the first mounting arm 241. The upper detection plunger 26 is mounted on the first mounting arm 241 by a fixing screw passing through the second mounting adjustment slot 219 of the first mounting arm 241. The fixing screw in the second installation adjustment slot 219 of the mounting arm 242 is installed on the second installation arm 242, and the lower detection plunger 27 is installed on the lower swing rod 25 by passing through the fixing screw in the second installation adjustment slot 219 of the lower swing rod 25, thereby installing the pre-sensing plunger 218 and the upper detection plunger 26 on the left end of the upper swing rod 24, and installing the lower detection plunger 27 on the left end of the lower swing rod 25, and at the same time, the installation positions of the pre-sensing plunger 218, the upper detection plunger 26 and the lower detection plunger 27 in the left and right directions can also be adjusted.

[0144] Preferably, if Figure 6 As shown, the detection unit 20 further includes a plunger fixing block 221 fixed to the upper ends of the pre-sensing plunger 218, the upper detection plunger 26, and the lower detection plunger 27. The pre-sensing plunger 218 is fixed to the first mounting arm 241 via the plunger fixing block 221 at its upper end, the upper detection plunger 26 is fixed to the second mounting arm 242 via the plunger fixing block 221 at its upper end, and the lower detection plunger 27 is fixed to the lower swing link 25 via the plunger fixing block 221 at its upper end. Furthermore, the plunger fixing block 221 at the upper end of the pre-sensing plunger 218 and the plunger fixing block 221 at the upper end of the upper detection plunger 26 are arranged between the first mounting arm 241 and the second mounting arm 242.

[0145] Furthermore, if Figure 8 As shown, the detection point moving unit 30 includes a movable support bracket 31 and a movable drive source 32 installed on the movable support bracket 31. The detection component bracket 21 can be installed on the movable support bracket 31 so as to be movable back and forth. The movable drive source 32 is connected to the detection component bracket 21 in a transmission manner and is in communication with the electronic control module. During the forward movement of the front and rear fabric pieces during sewing, when the upper bone position detection sensor 22 and the lower bone position detection sensor 23 detect the bone positions of the front and rear fabric pieces respectively, and when neither the upper bone position detection sensor 22 nor the lower bone position detection sensor 23 is triggered, the electronic control module controls the overlock sewing machine to stop, and the above-mentioned step S5 executed thereafter is specifically as follows:

[0146] The electronic control module controls the movement of the mobile drive source 32, and the mobile drive source 32 drives the detection component bracket 21 to move forward, which also drives the detection unit 20 to move forward as a whole, until any one of the upper bone position detection sensor 22 and the lower bone position detection sensor 23 is triggered, thereby adapting the bone positions on the front and rear pieces of cloth. At this time, the electronic control module controls the mobile drive source 32 to stop moving, and controls the upper bone position adjustment drive source 61 or the lower bone position adjustment drive source 71 to move according to the triggering conditions of the upper bone position detection sensor 22 and the lower bone position detection sensor 23: when the upper bone position detection sensor 22 is triggered first, the electronic control module controls the lower bone position adjustment drive source 71 to move, and the lower bone position adjustment drive source 71 drives the lower clamping assembly 72 and the rear piece of cloth clamped by it to move backward until the lower bone position detection sensor 23 is triggered. When the lower bone position detection sensor 23 is triggered first, the electronic control module controls the upper bone position adjustment drive source 61 to operate, and the upper bone position adjustment drive source 61 drives the upper clamping assembly 62 and the front cloth piece clamped by it to move backward until the upper bone position detection sensor 22 is triggered.

[0147] Preferably, if Figure 8 As shown, the detection point moving unit 30 also includes a nut connecting bracket 33 fixedly connected to the detection component bracket 21, and the nut connecting bracket 33 is a trapezoidal structural member; the mobile driving source 32 is a screw motor and is fixed to the mobile support bracket 31 through a motor mounting plate. The output end of the screw motor has a motor nut that can move back and forth, and the nut connecting bracket 33 is fixedly connected to the motor nut of the mobile driving source 32. When the mobile driving source 32 is in motion, the motor nut drives the nut connecting bracket 33 to move back and forth, thereby driving the detection component bracket 21 and the detection unit 20 to move back and forth as a whole. In addition, the detection point moving unit 30 also includes a first guide rail slider mechanism 36 extending back and forth. The first guide rail slider mechanism 36 is connected between the detection component bracket 21 and the mobile support bracket 31 to provide guidance for the back and forth movement of the detection component bracket 21.

[0148] Furthermore, if Figure 8 As shown, the detection point moving unit 30 also includes an origin detection sensor 34 fixed to the movable support bracket 31, and an origin sensing plate 35 fixed to the detection component bracket 21. The origin detection sensor 34 can sense the origin sensing plate 35 and communicate with the electronic control module. In the initial state, the origin detection sensor 34 senses the origin sensing plate 35. When the mobile drive source 32 drives the detection unit 20 forward to search for the bone position on the front and back pieces of fabric, the origin detection sensor 34 no longer senses the origin sensing plate 35. Thereafter, the mobile drive source 32 drives the detection unit 20 backward to reset until the origin detection sensor 34 senses the origin sensing plate 35. The electronic control module determines that the mobile drive source 32 has reset to the origin and controls the mobile drive source 32 to stop rotating.

[0149] Furthermore, if Figure 8As shown, the avoidance unit 40 includes a fixed avoidance mounting plate 41 and a avoidance drive source 42 installed on the avoidance mounting plate 41. The avoidance mounting plate 41 is fixed to the equipment frame 103. The avoidance drive source 42 is connected to the mobile support bracket 31 in a transmission manner to drive the mobile support bracket 31 to move toward or away from the front and back pieces of cloth. The avoidance drive source 42 is connected to the electronic control module in a communication manner. When the upper clamping assembly 62 and the lower clamping assembly 72 move to the bone position detection mechanism 101, the electronic control module controls the avoidance drive source 42 to move, and the avoidance drive source 42 drives the mobile support bracket 31 away from the sewing platform 104 and the front and back pieces of cloth on the sewing platform 104, so that an avoidance area is formed between the mobile support bracket 31 and the front and back pieces of cloth to allow the upper clamping assembly 62 and the lower clamping assembly 72 to pass through, ensuring that the bone position adjustment mechanism 102 transports the front and back pieces of cloth forward to the overlock sewing machine.

[0150] Furthermore, if Figure 3 and Figure 8 As shown, the avoidance drive source 42 is a pneumatic cylinder fixed to the avoidance mounting plate 41. The avoidance unit 40 also includes an avoidance connecting bracket 43 installed at the left end of the cylinder piston rod of the avoidance drive source 42, a fixed limit mounting bracket 44, a limit screw 45 threadedly engaged in the limit mounting bracket 44, and a buffer body 46 fixed to the right end of the limit screw 45. The movable support bracket 31 is fixedly connected to the avoidance connecting bracket 43, the limit mounting bracket 44 is fixed to the equipment frame 103, and the avoidance connecting bracket 43 can abut against the buffer body 46. When the bone position adjustment mechanism 102 has not moved forward to the bone position detection mechanism 101, the cylinder piston rod of the avoidance drive source 42 remains extended to the left, at which time the avoidance connecting bracket 43 abuts against the buffer body 46. When the bone position adjustment mechanism 102 moves forward to the bone position detection mechanism 101, the cylinder piston rod of the avoidance drive source 42 retracts to the right, driving the movable support bracket 31 to move to the right in the direction away from the sewing platform 104, thereby driving the detection point moving unit 30 and the detection unit 20 to move to the right, forming an avoidance area for the upper clamping assembly 62 and the lower clamping assembly 72 to pass forward. After sewing is completed, the bone position adjustment mechanism 102 is reset, the avoidance drive source 42 is also reset, and the avoidance connecting bracket 43 is again in contact with the buffer body 46. In addition, the left and right positions of the buffer body 46 can be adjusted by the limit screw 45 to control the leftward extension distance of the cylinder piston rod of the avoidance drive source 42.

[0151] Preferably, if Figure 8 As shown, the avoidance unit 40 further includes a second guide rail slider mechanism 47 extending straightly left and right. The second guide rail slider mechanism 47 is connected between the avoidance connecting bracket 43 and the avoidance mounting plate 41 to provide guidance for the left and right movement of the avoidance connecting bracket 43.

[0152] Bone position adjustment mechanism 102

[0153] like Figure 9 and Figure 10 As shown, the bone position adjustment mechanism 102 includes a feeding moving unit 50, and an upper bone position adjustment unit 60 and a lower bone position adjustment unit 70 both mounted on the feeding moving unit 50. The feeding moving unit 50 includes a feeding base 51 mounted on the equipment frame 103 so as to be movable forward and backward, a third guide rail slider mechanism 52 extending straight forward and backward, a feeding motor, and a feeding transmission assembly; the feeding motor is connected to the feeding base 51 through the feeding transmission assembly, driving the feeding base 51 to move forward and backward, and the upper bone position adjustment unit 60 and the lower bone position adjustment unit 70 move forward and backward with the feeding base 51, so that the upper clamping assembly 62 and the lower clamping assembly 72 respectively clamp the front piece of cloth and the back piece of cloth and move forward, and the forward movement speed of the feeding base 51 always matches the feeding speed of the sewing machine 105; the third guide rail slider mechanism 52 is connected between the feeding base 51 and the equipment frame 103 to provide guidance for the forward and backward movement of the feeding base 51.

[0154] In addition to the above-mentioned upper bone position adjustment drive source 61 and upper clamping assembly 62, the upper bone position adjustment unit 60 also includes an upper correction unit. Figure 11 As shown, the upper bone position adjustment drive source 61 is a screw motor with a motor nut that can move back and forth at its output end. The motor nut of the upper bone position adjustment drive source 61 is connected to the upper clamping assembly 62 via an upper correction unit. When the feed motor drives the feed base 51 forward, the upper clamping assembly 62 and the front fabric piece it clamps also move forward, achieving forward feeding of the front fabric piece. During automatic bone alignment, the upper bone position adjustment drive source 61 drives the upper clamping assembly 62 to move back and forth, adjusting the front and back position of the bone position on the front fabric piece, achieving automatic bone alignment. The upper correction unit is used to adjust the left and right position of the upper clamping assembly 62, automatically correcting the left and right position of the right edge of the front fabric piece.

[0155] Furthermore, if Figure 11 As shown, the upper bone position adjustment unit 60 also includes a first motor connecting seat 68, the upper bone position adjustment drive source 61 is fixed on the first motor connecting seat 68, and the first motor connecting seat 68 is fixed on the feeding base 51; the upper correction unit includes a first nut connecting plate 63, an upper correction mounting plate 64 fixed to the first nut connecting plate 63, an upper correction mounting plate 64 installed on the upper correction mounting plate 64, an upper correction motor 65 driven to rotate by the upper correction motor 65, and an upper correction rack 67 engaged with the upper correction gear 66, the first nut connecting plate 63 is fixedly connected to the motor nut of the upper bone position adjustment drive source 61, the upper correction rack 67 extends straight left and right in a direction perpendicular to the moving direction of the motor nut, and the upper clamping assembly 62 is installed on the upper correction rack 67.

[0156] Furthermore, if Figure 11As shown, the left end of the upper correction rack 67 is fixed with a splint fixing block 610 by screws, and the upper clamping assembly 62 is arranged on the front side of the upper bone position adjustment unit 60; the upper clamping assembly 62 includes a pair of upper splints 81 and lower splints 82 that can be opened and closed up and down, and an opening and closing drive source 83, the opening and closing drive source 83 is a cylinder and is fixed on the splint fixing block 610, the upper splint 81 is fixed on the splint fixing block 610, the cylinder piston rod of the opening and closing drive source 83 is fixedly connected to the lower splint 82, driving the lower splint 82 to move up and down, thereby realizing the opening or closing of the lower splint 82 and the upper splint 81, that is, clamping or loosening the cloth piece accordingly.

[0157] Preferably, if Figure 11 As shown, the upper bone position adjustment unit 60 also includes an upper microswitch 69 fixed to the first motor connection seat 68. The upper microswitch 69 is arranged directly in front of the first nut connecting plate 63 and is communicatively connected to the electronic control module. When the upper bone position adjustment drive source 61 is at the origin, the first nut connecting plate 63 triggers the upper microswitch 69. In this way, during the process of adjusting the bone position of the front fabric, the motor nut of the upper bone position adjustment drive source 61 moves backward, causing the first nut connecting plate 63 to move away from the upper microswitch 69. After the bone position adjustment of the front fabric is completed, the upper bone position adjustment drive source 61 needs to be reset, and the first nut connecting plate 63 moves forward. When the upper microswitch 69 is abutted by the first nut connecting plate 63 and is in the closed state, it indicates that the upper bone position adjustment drive source 61 has returned to the origin, and the electronic control module can control the upper bone position adjustment drive source 61 to stop rotating.

[0158] In addition to the above-mentioned lower bone position adjustment drive source 71 and lower clamping assembly 72, the lower bone position adjustment unit 70 also includes a lower correction unit. Figure 12 As shown, the output end of the lower correction unit is connected to a lower bone position adjustment drive source 71, which is a screw motor. The output end of the screw motor has a motor nut that can move back and forth. The motor nut of the lower bone position adjustment drive source 71 is connected to the lower clamping assembly 72. When the feeding motor drives the feeding base 51 forward, the lower clamping assembly 72 and the rear fabric piece it clamps also move forward, achieving forward feeding of the rear fabric piece. During automatic bone alignment, the lower bone position adjustment drive source 71 drives the lower clamping assembly 72 to move back and forth, adjusting the front and back position of the bone position on the rear fabric piece to achieve automatic bone alignment. The lower correction unit is used to adjust the left and right position of the lower clamping assembly 72, automatically correcting the left and right position of the right edge of the rear fabric piece.

[0159] Furthermore, if Figure 12As shown, the lower correction unit includes a lower correction mounting plate 73, a lower correction motor 74 installed on the lower correction mounting plate 73, a lower correction gear 75 driven by the lower correction motor 74, a lower correction rack 76 engaged with the lower correction gear 75, a second motor connecting seat 77 fixed to the lower correction rack 76, and a second nut connecting plate 78. The lower correction mounting plate 73 is fixed on the feeding base 51, the lower bone position adjustment drive source 71 is installed on the second motor connecting seat 77, the second nut connecting plate 78 is fixedly connected to the motor nut of the lower bone position adjustment drive source 71, and the lower clamping assembly 72 is installed on the second nut connecting plate 78.

[0160] Furthermore, if Figure 12 As shown, the lower clamping assembly 72 is arranged on the front side of the lower bone position adjustment unit 70; the lower clamping assembly 72 includes a pair of upper splints 81 and lower splints 82 that can be opened and closed up and down, and an opening and closing drive source 83, the opening and closing drive source 83 is a cylinder and is fixed on the second nut connecting plate 78, the lower splint 82 is fixed on the second nut connecting plate 78, the cylinder piston rod of the opening and closing drive source 83 is fixedly connected to the upper splint 81, driving the upper splint 81 to move up and down, thereby realizing the opening or closing of the lower splint 82 and the upper splint 81, that is, clamping or loosening the cloth piece accordingly.

[0161] Preferably, if Figure 12 As shown, the lower bone position adjustment unit 70 also includes a lower microswitch 79 fixed to the second motor connection seat 77. The lower microswitch 79 is arranged on the front side of the second nut connecting plate 78 and is communicatively connected to the electronic control module. When the lower bone position adjustment drive source 71 is at the origin, the second nut connecting plate 78 just triggers the upper microswitch 69. In this way, during the process of adjusting the bone position of the rear fabric piece, the motor nut of the lower bone position adjustment drive source 71 is moved backward, causing the second nut connecting plate 78 to move away from the lower microswitch 79. After the bone position adjustment of the rear fabric piece is completed, the lower bone position adjustment drive source 71 needs to be reset, and the second nut connecting plate 78 is moved forward. When the lower microswitch 79 is abutted by the second nut connecting plate 78 and is in the closed state, it means that the lower bone position adjustment drive source 71 has returned to the origin, and the electronic control module can control the lower bone position adjustment drive source 71 to stop rotating.

[0162] In this embodiment, the upper clamping assembly 62 and the lower clamping assembly 72 both adopt a splint structure; of course, in other embodiments, the upper clamping assembly 62 and the lower clamping assembly 72 can also adopt a pulley cloth pressing structure, a needle-punched cloth binding structure, etc.

[0163] In summary, the bone alignment process of the double-piece stitching system involved in this application is as follows.

[0164] First, in the initial state, in the bone position detection mechanism 101, the cylinder piston rod of the avoidance drive source 42 remains extended to the left, and the avoidance connecting bracket 43 abuts the buffer body 46. The mobile drive source 32 is at its origin position, and the origin sensing plate 35 blocks the origin detection sensor 34 and can be sensed by the origin detection sensor 34. The cylinders of the upper push rod assembly 211 and the lower push rod assembly 212 are both in operation, and the upper and lower swing arms 24 and 25 are both in the open state. In the bone position adjustment mechanism 102, the upper and lower bone position adjustment drive sources 61 and 71 are at their respective origins. The first nut connecting plate 63 is at its front limit position and abuts the upper microswitch 69. The second nut connecting plate 78 is at its front limit position and abuts the lower microswitch 79. The upper and lower microswitches 69 and 79 are both closed.

[0165] 2. Loading: the right edge of the front piece of fabric is in the upper feeding channel, and the front piece of fabric is clamped by the upper clamping assembly 62 ; the right edge of the back piece of fabric is in the lower feeding channel, and the back piece of fabric is clamped by the lower clamping assembly 72 .

[0166] 3. After the loading is completed, the cylinders of the upper ejector assembly 211 and the lower ejector assembly 212 are reset respectively, the upper swing arm 24 and the lower swing arm 25 are reset respectively and are in a closed state. The thickness of the upper feeding channel formed between the pre-sensing plunger 218 and the upper detection plunger 26 and the middle partition 28 is approximately the thickness of a layer of cloth, and the thickness of the lower feeding channel formed between the lower detection plunger 27 and the middle partition 28 is approximately the thickness of a layer of cloth.

[0167] 4. As sewing proceeds, the front and back pieces of cloth are stacked up and down, and the feeding mechanism in the overlock sewing machine drives the front and back pieces of cloth to move forward. At the same time, the feeding motor in the bone position adjustment mechanism 102 runs to transport the front and back pieces of cloth forward. The speed of the feeding motor matches the speed of the overlock sewing machine, that is, the feeding speed of the front and back pieces of cloth transported forward by the bone position adjustment mechanism 102 is always matched with the feeding speed of the overlock sewing machine.

[0168] Fifth, as sewing progresses, the front fabric's ribs will pre-lift the pre-sensing plunger 218 as it advances, driving the upper swing rod 24 to rotate clockwise by a certain angle. The upper rib detection sensor 22 is triggered, and the electronic control module controls the overlock sewing machine to slow down, as well as the feed motor, allowing the front and rear fabrics to continue advancing. Subsequently, the rear fabric's ribs will push down on the lower detection plunger 27 as it advances, driving the lower swing rod 25 to rotate counterclockwise by a certain angle, triggering the lower rib detection sensor 23. As feeding continues, the front and rear fabrics continue to advance. When both the upper rib detection sensor 22 and the lower rib detection sensor 23 lose their signals, the electronic control module controls the overlock sewing machine to stop, as well as the feed motor. At this point, the ribs on the front fabric have moved forward past the upper detection plunger 26, and the ribs on the rear fabric have moved forward past the lower detection plunger 27.

[0169] 6. The electronic control module controls the mobile drive source 32 to rotate and drives the detection unit 20 to move forward. Then the upper detection plunger 26 and the lower detection plunger 27 both move forward, respectively searching for the bone position on the front piece of cloth and the bone position on the back piece of cloth, until any one of the upper bone position detection sensor 22 and the lower bone position detection sensor 23 is triggered, and the bone position is re-positioned. At this time, the electronic control module controls the mobile drive source 32 to stop rotating, and controls the operation of the upper bone position adjustment drive source 61 and the lower bone position adjustment drive source 71 according to the triggering status of the upper bone position detection sensor 22 and the lower bone position detection sensor 23.

[0170] In case 1, the upper bone position detection sensor 22 is triggered first, indicating that the bone position on the front fabric piece is aligned with the upper detection plunger 26, but the bone position on the back fabric piece is still located in front of the lower detection plunger 27. At this time, the electronic control module controls the rotation of the lower bone position adjustment drive source 71, which drives the lower clamping assembly 72 to move backward. The lower clamping assembly 72 drives the clamped back fabric piece backward until the lower bone position detection sensor 23 is triggered. At this time, the bone position on the back fabric piece is aligned with the lower detection plunger 27. The upper detection plunger 26 and the lower detection plunger 27 are aligned vertically, thus aligning the bone position on the front fabric piece with the bone position on the back fabric piece, achieving automatic bone alignment.

[0171] In the second scenario, the lower bone position detection sensor 23 is triggered first, indicating that the bone position on the rear fabric piece is aligned with the lower detection plunger 27, but the bone position on the front fabric piece is still located in front of the upper detection plunger 26. At this time, the electronic control module controls the upper bone position adjustment drive source 61 to rotate, which drives the upper clamping assembly 62 to move backward. The upper clamping assembly 62 drives the front fabric piece it clamps backward until the upper bone position detection sensor 22 is triggered. At this time, the bone position on the front fabric piece is aligned with the upper detection plunger 26. The upper detection plunger 26 and the lower detection plunger 27 are aligned vertically, thus aligning the bone position on the front fabric piece with the bone position on the rear fabric piece, achieving automatic bone alignment.

[0172] 7. After the bone alignment is completed, the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are both triggered and have signals, the cylinders of the upper push rod assembly 211 and the lower push rod assembly 212 are both activated, driving the upper swing rod 24 and the lower swing rod 25 to open, the pre-sensing plunger 218 and the upper detection plunger 26 are away from the front piece of cloth, and the lower detection plunger 27 is away from the back piece of cloth; after that, the electronic control module controls the mobile drive source 32 to reset until the origin detection sensor 34 is triggered.

[0173] 8. The electronic control module controls the overlock sewing machine to continue sewing and the feed motor in the bone position adjustment mechanism 102 to continue operating. When the bone position adjustment mechanism 102 moves forward to the bone position detection mechanism 101, the electronic control module controls the cylinder piston of the avoidance drive source 42 to retract to the right, driving the detection unit 20 and the detection point moving unit 30 to move rightward to avoid the bone position adjustment mechanism 102.

[0174] 9. After the front and back pieces of cloth move forward to the redundant position, the electric control module controls the lower bone position detection sensor 23 to reset until the lower micro switch 79 is triggered, thereby starting the redundant action. After the redundant action is completed, continue sewing.

[0175] 10. After sewing is completed, the feeding motor in the bone position adjustment mechanism 102 is reset, and the bone position adjustment mechanism 102 moves backward to its origin. During this process, the electronic control module controls the upper bone position detection sensor 22 to reset until the upper micro switch 69 is triggered; when the bone position adjustment mechanism 102 moves backward over the bone position detection mechanism 101, the electronic control module controls the cylinder piston of the avoidance drive source 42 to extend to the left, and the bone position detection mechanism 101 is reset to its initial state.

[0176] The following is a diagram illustrating the relationship between the upper bone position detection sensor 22, the pre-sensing plunger 218, the upper detection plunger 26 and the upper bone position of the front piece of cloth during the bone alignment process, taking the upper bone position detection sensor 22 being triggered first when the detection unit 20 moves forward as an example. Figure 13 As shown in a, the bone position has not passed the pre-sensing plunger 218, and the upper bone position detection sensor 22 has not been triggered. The bone position is always on the rear side of the pre-sensing plunger 218. As the front piece of cloth moves forward, the bone position also moves forward toward the pre-sensing plunger 218. When the bone position contacts the pre-sensing plunger 218, as shown in FIG. Figure 13 As shown in b, the thickness of the bone position will push the pre-sensing plunger 218 upward, and the upper bone position detection sensor 22 will be triggered; then, as shown in Figure 13 As shown in FIG. 3 , the bone position passes through the pre-sensing plunger 218 and the upper detection plunger 26, and the upper bone position detection sensor 22 returns to the untriggered state; finally, when the mobile driving source 32 drives the detection unit 20 to move forward to search for the bone position, the upper detection plunger 26 first contacts the bone position, as shown in FIG. Figure 13 As shown in FIG. 3 , due to the flexibility of the cloth, the bone position is moved to the other side by the upper detection plunger 26 , and the upper detection plunger 26 is accurately positioned at the rear end of the bone position, and the upper bone position detection sensor 22 is triggered again.

[0177] In summary, this application has the following advantages:

[0178] 1. During the sewing process of cloth pieces, the automatic alignment of the front and back pieces of cloth can be completed quickly and accurately. By replacing manual alignment with automation, the operation requirements for employees are reduced while ensuring the alignment accuracy. The alignment accuracy is high and stable, which improves the quality of double-piece seams, reduces time and manpower consumption, and improves production efficiency.

[0179] 2. Add a pre-sensing plunger 218. After the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are triggered successively, the sewing machine 105 is controlled to slow down sewing to reduce the impact on the sewing stitches of the fabric itself, so as to achieve the same stitch effect as manual sewing, and also shorten the subsequent steps and time of automated bone alignment.

[0180] 3. By configuring the detection point moving unit 30 to automatically find the bone position, the amount of bone adjustment can be reduced, the bone alignment work can be completed with a very small displacement, and the bone positioning can be ensured to be accurate, making up for the positioning position deviation caused by the non-instantaneous deceleration of the sewing machine 105 during a single detection and positioning, enhancing the bone effect, reducing the stretching of the cloth when it is on the bone, and ensuring the beauty of the sewing stitches at the bone position.

[0181] 4. The bone accuracy is controlled within ±1mm, which is more stable and of better quality than manual ones and has market competitiveness.

[0182] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0183] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A method for automatically suturing bone positions, characterized by: The following steps are involved: S1. A double-piece stitching system is configured, wherein the double-piece stitching system comprises an electric control module, a fixed equipment frame (103), a bone position detection mechanism (101) and a bone position adjustment mechanism (102) both mounted on the equipment frame (103), a sewing table (104) fixed on the equipment frame (103), and a sewing machine (105) mounted on the equipment frame (103), wherein the bone position adjustment mechanism (102), the bone position detection mechanism (101) and the sewing machine (105) are sequentially arranged along the feeding direction of the front and back pieces of fabric; the bone position detection mechanism (101) comprises a detection component bracket (21), and an upper bone position detection sensor ( 22) and a lower bone position detection sensor (23), the upper bone position detection sensor (22) and the lower bone position detection sensor (23) are both mounted on the detection component bracket (21); the bone position adjustment mechanism (102) comprises an upper bone position adjustment drive source (61), an upper clamping component (62) connected to the upper bone position adjustment drive source (61), a lower bone position adjustment drive source (71), and a lower clamping component (72) connected to the lower bone position adjustment drive source (71); the upper bone position detection sensor (22), the lower bone position detection sensor (23), the upper bone position adjustment drive source (61) and the lower bone position adjustment drive source (71) are all connected to the electric control module for communication; S2, loading the front and back pieces of fabric onto the sewing table (104); S3, the sewing machine (105) starts sewing, and the front and back pieces of fabric move forward; S4, when the upper bone position detection sensor (22) detects the bone position of the front piece of cloth, and the lower bone position detection sensor (23) detects the bone position of the back piece of cloth, the electric control module controls the sewing machine (105) to stop; S5, the electric control module controls the upper bone position adjustment driving source (61) and / or the lower bone position adjustment driving source (71) to operate until the upper bone position detection sensor (22) detects the bone position of the front piece of cloth, and the lower bone position detection sensor (23) detects the bone position of the back piece of cloth; S6. The sewing machine (105) continues sewing.

2. The automatic bone alignment suturing method according to claim 1, characterized in that: The bone position adjustment mechanism (102) further comprises a movable support bracket (31) and a movable driving source (32) mounted on the movable support bracket (31); the detection component bracket (21) is mounted on the movable support bracket (31) so as to be movable forward and backward; the movable driving source (32) is in transmission connection with the detection component bracket (21) and is in communication connection with the electric control module; The step S5 is: The electric control module controls the movement of the mobile driving source (32), and the mobile driving source (32) drives the detection component bracket (21) to move forward until any one of the upper bone position detection sensor (22) and the lower bone position detection sensor (23) is triggered. The electric control module controls the movement of the driving source (32) to stop, and controls the movement of the upper bone position adjustment driving source (61) or the lower bone position adjustment driving source (71) according to the triggering conditions of the upper bone position detection sensor (22) and the lower bone position detection sensor (23): When the upper bone position detection sensor (22) is triggered first, the electric control module controls the lower bone position adjustment drive source (71) to operate, and the lower bone position adjustment drive source (71) drives the lower clamping assembly (72) and the rear cloth piece clamped therein to move backward until the lower bone position detection sensor (23) is triggered; When the lower bone position detection sensor (23) is triggered first, the electric control module controls the upper bone position adjustment drive source (61) to operate, and the upper bone position adjustment drive source (61) drives the upper clamping component (62) and the front cloth piece clamped by it to move backward until the upper bone position detection sensor (22) is triggered.

3. The automatic bone alignment suturing method according to claim 1 or 2, characterized in that: The bone position detection mechanism (101) further comprises an upper swing rod (24) and a lower swing rod (25) both rotatably mounted on the detection component bracket (21), an upper detection plunger (26) mounted on one end of the upper swing rod (24), a lower detection plunger (27) mounted on one end of the lower swing rod (25), and a middle partition (28) fixed to the detection component bracket (21), wherein the upper detection plunger (26) and the lower detection plunger (27) are distributed on the upper and lower sides of the middle partition (28) and are directly opposite to each other in the upper and lower directions, an upper feeding channel for allowing the front piece of cloth to pass through is formed between the lower end of the upper detection plunger (26) and the middle partition (28), and a lower feeding channel for allowing the rear piece of cloth to pass through is formed between the upper end of the lower detection plunger (27) and the middle partition (28), the upper bone position detection sensor (22) is aligned with the other end of the upper swing rod (24), and the lower bone position detection sensor (23) is aligned with the other end of the lower swing rod (25).

4. The automatic bone alignment suturing method according to claim 3, characterized in that: The bone position detection mechanism (101) further comprises a pre-sensing plunger (218), the pre-sensing plunger (218) being mounted on one end of the upper swing rod (24), the pre-sensing plunger (218) and the upper detection plunger (26) being distributed in sequence along the feeding direction of the front and rear cloth pieces; The step S4 includes the following sub-steps in sequence: S41, during the forward movement of the front and rear cloth pieces, the bone position on the front cloth piece pre-lifts the pre-sensing plunger (218), and the upper bone position detection sensor (22) is triggered; S42, the electronic control module controls the sewing machine (105) to slow down sewing; S43, the front and rear cloth pieces continue to move forward, the bone position on the rear cloth piece pushes down against the lower detection plunger (27), and the lower bone position detection sensor (23) is triggered; S44: The front and rear cloth pieces continue to move forward, and when neither the upper bone position detection sensor (22) nor the lower bone position detection sensor (23) is triggered, the electric control module controls the sewing machine (105) to stop.

5. The automatic bone alignment suturing method according to claim 1, characterized in that: The bone position adjustment mechanism (102) further includes a feeding motor and a feeding base (51), wherein the feeding motor is in transmission connection with the feeding base (51) to drive the feeding base (51) to move forward and backward, the upper bone position adjustment driving source (61) and the lower bone position adjustment driving source (71) are both installed on the feeding base (51), and the feeding motor is in communication connection with the electric control module; During the sewing process of the sewing machine (105), the electric control module controls the operation of the feeding motor, drives the feeding base (51) to move forward, and causes the upper clamping assembly (62) and the lower clamping assembly (72) to respectively clamp the front piece of cloth and the back piece of cloth and move forward, and the forward movement speed of the feeding base (51) matches the feeding speed of the sewing machine (105).

6. The automatic bone alignment suturing method according to claim 5, characterized in that: The bone position detection mechanism (101) further includes an avoidance unit (40), the avoidance unit (40) including a fixed avoidance mounting plate (41) and an avoidance driving source (42) mounted on the avoidance mounting plate (41), the avoidance driving source (42) being in transmission connection with the movable support bracket (31) to drive the movable support bracket (31) to move toward or away from the seam platform (104), and the avoidance driving source (42) being in communication connection with the electric control module; When the upper clamping assembly (62) and the lower clamping assembly (72) move to the bone position detection mechanism (101), the electric control module controls the avoidance drive source (42) to move so that the movable support bracket (31) moves away from the seam platform (104).

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