Automatic bone position aligning sewing method

Abstract

The invention provides an automatic bone position aligning sewing method, a double-piece splicing system is configured, the double-piece splicing system comprises an electric control module, an equipment rack, a bone position detection mechanism, a bone position adjusting mechanism, a sewing table and a sewing machine, and the bone position detection mechanism comprises an upper bone position detection sensor and a lower bone position detection sensor which are arranged in an up-down opposite mode; the bone position adjusting mechanism comprises an upper bone position adjusting driving source, an upper clamping assembly in transmission connection with the upper bone position adjusting driving source, a lower bone position adjusting driving source and a lower clamping assembly in transmission connection with the lower bone position adjusting driving source. Starting sewing by the sewing machine after feeding; when the upper bone position detection sensor and the lower bone position detection sensor both detect the bone position, the sewing machine is stopped; the electric control module controls the upper bone position adjustment driving source and / or the lower bone position adjustment driving source to act until the upper bone position detection sensor and the lower bone position detection sensor are triggered; the sewing machine continues sewing. According to the invention, automatic, rapid and accurate bone alignment during double-piece splicing is realized, and the double-piece splicing quality and efficiency are improved.

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] In the sewing process of T-shirts, sweatshirts and other ready-made clothing pieces, the front and back pieces will be stitched together. The front and back pieces are stitched together from multiple parts, so there are stitches on the front and back pieces from the previous sewing and splicing process, which makes the front and back pieces have an area with a higher thickness than other parts at the splicing point. This area is the bone position, that is, the front and back pieces have a greater thickness at the bone position. In the stitching process of the front and back pieces, in order to ensure the wearing comfort of the finished garment, there are special requirements for the bone position of the front and back pieces at the cuff position. It is necessary to ensure that the bone position of the front and back pieces at the cuff is strictly aligned. This step is called bone alignment, or bone alignment for short.

[0003] At present, the bone alignment of the front and back pieces of fabric is mainly based on manual observation and manual adjustment, which is called manual bone alignment. The bone positions of the front and back pieces of fabric are manually aligned before sewing, which results in the inability to reliably guarantee the bone alignment accuracy, lack of stability, and poor adaptability to different fabrics. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an 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 suturing method, comprising the following steps:

[0006] S1. Configuring a double-piece stitching system, the double-piece stitching system comprising an electric 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 on 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 rear pieces of fabric;

[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 vertically opposite to each other, 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 connected to the upper bone position adjustment drive source, a lower bone position adjustment drive source, and a lower clamping component 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 connected to the electronic control module for communication;

[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 rear pieces of fabric move forward;

[0010] S4, when 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, the electric control module controls the sewing machine to stop;

[0011] S5, the electric 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 also includes a movable support bracket and a movable driving source installed on the movable support bracket, the detection component bracket can be installed on the movable support bracket so as to be movable forward and backward, the movable driving source is transmission-connected with the detection component bracket and is communication-connected with the electric control module;

[0014] The step S5 is:

[0015] The electric control module controls the movement of the mobile drive source, and the mobile drive source 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, and 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 conditions 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 rotatably mounted on the detection component bracket, an upper detection plunger mounted at one end of the upper swing rod, a lower detection plunger mounted at 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 is mounted on one end of the upper swing rod, and the pre-sensing plunger and the upper detection plunger are successively distributed along the feeding direction of the front and rear cloth pieces;

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

[0021] S41, during the process of the front and rear cloth pieces moving forward, the bone position on the front cloth 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, the bone position on the rear cloth piece pushes down against the lower detection plunger, and the lower bone position detection sensor is triggered;

[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 electric 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 driving source and the lower bone position adjustment driving source are both installed on the feeding base, and the feeding motor is in communication connection with the electric 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 rear piece of cloth respectively and move forward, and 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, the avoidance unit includes a fixed avoidance mounting plate, and an avoidance driving source installed on the avoidance mounting plate, the avoidance driving source is transmission-connected to the mobile support bracket, drives the mobile support bracket to move toward or away from the seam platform, and the avoidance driving source is communication-connected to the electric 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 driving source to move so that the movable support bracket is 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 fabric pieces by means of a bone position detection mechanism, and then combines with a bone position adjustment mechanism to drive the front and back fabric pieces to move forward and backward respectively, so that the bone positions of the front and back fabric pieces are strictly aligned, thereby achieving automatic, rapid and accurate bone alignment when the two pieces are stitched together, reliably ensuring the bone alignment accuracy, and effectively improving the quality and efficiency of the stitching of the two pieces. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0033] Figure 3 It is a structural schematic 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 the avoidance unit.

[0035] Figure 6 for Figure 3 Schematic diagram of the connection between the middle upper swing rod, 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] Fig. 9 and Fig.10 Schematic diagram of the structure of the bone position adjustment mechanism in this application at different viewing angles.

[0039] Fig.11 It 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 the present application.

[0040] Fig.12 It 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] Fig.13 a to Fig.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 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 Upswing

[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 push rod bracket

[0060] 210 Lower push rod bracket

[0061] 211 upper ejector assembly

[0062] 212 Lower ejector assembly

[0063] 213 Top 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 connection 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

[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 deflection-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 deviation correction motor

[0106] 75 Lower deviation correcting gear

[0107] 76 Lower guide 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 is a description of the implementation of the present invention by means of specific embodiments. Those 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. drawn 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 limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of 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 effects and purposes that can be achieved by 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. The change or adjustment of their relative relationship 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 on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0117] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. 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 an automatic bone alignment suturing method, such as Figure 1 As shown, the automatic bone alignment suturing method includes the following steps.

[0119] Step S1: configure a double-piece stitching system, which is used to stitch the front and back pieces of fabric. 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 rear 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 the convenience of description, in the following embodiments, the definitions of various directions are as follows: the moving direction of the front and rear pieces of cloth during sewing is defined as the front direction, which is also the feeding direction of the front and rear pieces of cloth; the stacking direction of the front and rear pieces of cloth is defined as the up-down direction, and in this embodiment, the front piece of cloth is on the top and the back piece of cloth is on the bottom; the direction orthogonal to both the front-to-back 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 distributed from back to front in sequence, and are all arranged on the right edge side of the sewing platform 104. In addition, in this embodiment, the type of 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 the 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 the bone position on the back piece of cloth, the lower bone position detection sensor 23 is triggered. Fig. 9 and Fig.10 As shown, the bone position adjustment mechanism 102 includes an upper bone position adjustment driving source 61, an upper clamping assembly 62 connected to the upper bone position adjustment driving source 61, a lower bone position adjustment driving source 71, and a lower clamping assembly 72 connected to the lower bone position adjustment driving source 71. The upper bone position adjustment driving source 61 drives the upper clamping assembly 62 and the front cloth piece clamped by the upper clamping assembly 62 to move forward and backward, and the lower bone position adjustment driving source 71 drives the lower clamping assembly 72 and the rear cloth 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 driving source 61, and the lower bone position adjustment driving source 71 are all connected to the electric control module for communication.

[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 rear fabric pieces 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 electric control module controls the upper bone position adjustment drive source 61 and / or the lower bone position adjustment drive source 71 to operate, adjust the front and rear positions of the front cloth piece and / or the rear cloth piece, 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 application detects the bone position on the front piece of cloth and the bone position on the back piece of cloth 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 cloth clamped by the upper clamping assembly 62 to move forward and backward through the upper bone position adjustment driving source 61, and adjusts the front and rear position of the bone position on the front piece of cloth; drives the lower clamping assembly 72 and the back piece of cloth clamped by the lower clamping assembly 72 to move forward and backward through the lower bone position adjustment driving source 71, and adjusts the front and rear position of the bone position on the back piece of cloth. The electric control module controls the action 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 position of the front piece of cloth and the bone position of the back piece of cloth, realizes automatic, fast and accurate bone alignment when the two pieces are stitched, reliably guarantees the bone alignment accuracy, and effectively improves the quality and efficiency of the two pieces stitching.

[0128] Furthermore, if Figure 2 As shown, the bone position detection mechanism 101 and the bone position adjustment mechanism 102 are two independent modules, which are respectively installed on the equipment frame 103. Among them, the bone position detection mechanism 101 is an adaptive bone position detection mechanism, which can adapt to the bone position on the front and back pieces of cloth, that is, it can automatically find the bone position on the front and back pieces of cloth. The bone position adjustment mechanism 102 is an adaptive bone position adjustment mechanism, which can adjust the front and back positions of the bones on the front and back pieces of cloth; and the bone position adjustment mechanism 102 can be installed on the equipment frame 103 so that it can move forward and backward. In addition to being used to adjust the bone position of the front and back pieces of cloth, the bone position adjustment mechanism 102 is also used to feed the front and back pieces of cloth 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 position 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 straightly to the 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 through the equal height screws 220 extending forward and backward, and the middle position of the lower swing rod 25 is rotatably mounted on the detection component bracket 21 through the equal height screws 220 extending forward and backward; the middle The partition 28 is distributed on the left side of the detection component bracket 21 and between the upper swing rod 24 and the lower swing rod 25, so that 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 the upper detection plunger 26 and the lower detection plunger 27 are directly opposite to each other, that is, the upper detection plunger 26 and the lower detection plunger 27 are separated by the middle partition 28; an upper material passage 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 material passage 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 right end of the upper swing rod 24, and the lower bone position detection sensor 23 is aligned with the right end of the lower swing rod 25. Preferably, the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are both diffuse reflection sensors.

[0133] The detection 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 material passage 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 material passage 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 past 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 does not change, 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 does not change, 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 forward, the bone on the front piece of cloth pushes up the detection plunger 26, driving the upper swing rod 24 to rotate clockwise by 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, and the electronic control module determines that the upper bone position detection sensor 22 detects the bone position on the front piece of cloth. Similarly, when the bone position on the rear piece of cloth reaches the lower detection plunger 27, the bone position on the rear piece of cloth pushes the lower detection plunger 27 downward, driving the lower swing rod 25 to rotate counterclockwise through an angle, such as 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, and the electronic control module determines that the lower bone position detection sensor 23 detects the bone position on the rear 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 cloth pieces, and detect the bone positions on the front and back cloth pieces 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 in FIG. Figure 4 As shown, the upper push rod 24 is in a horizontal state by the contact between the upper push rod 213 and the upper swing rod 24; when the piston rod of the cylinder of the lower push rod 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 swing 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, so that the front cloth piece can enter the feeding channel when loading. Similarly, the cylinder of the lower push rod assembly 212 is actuated, 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, so that the rear cloth piece can enter the lower feeding channel when loading.

[0136] Preferably, the weight of the left end of the upper swing rod 24 equipped with the upper detection plunger 26 is greater than the weight of the right end of the upper swing rod 24, and the weight of the left end of the lower swing rod 25 equipped with the lower detection plunger 27 is less than the weight of the right end of the lower swing rod 25. The implementation method can be to install counterweights on the left end of the upper swing rod 24 and the right end of the lower swing rod 25. In this way, when the front and rear pieces of cloth are loaded, the cylinder of the upper push rod assembly 211 and the cylinder of the lower push rod assembly 212 are reset respectively, and the upper swing rod 24 swings counterclockwise under the action of its gravity, resets to a horizontal state and closes, and the lower swing rod 25 swings clockwise under the action of its gravity, resets to a horizontal state and closes. The present application drives the upper swing rod 24 and the lower swing rod 25 to open through the upper push rod assembly 211 and the lower push rod assembly 212, and drives the upper swing rod 24 and the lower swing rod 25 to close through the gravity of the upper swing rod 24 and the lower swing rod 25. 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 at 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 an upper sensor mounting plate 215 by screws, and the right end of the lower push rod bracket 210 is fixed with a 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 positions 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 further 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 successively distributed along the feeding direction of the front cloth piece, that is, the pre-sensing plunger 218 is distributed directly behind the upper detection plunger 26. The above step S4 includes the following sub-steps in sequence:

[0139] Step S41, when the front and rear fabric pieces move forward during sewing, the pre-sensing plunger 218 contacts the bone position of the front fabric piece first compared to the upper detection plunger 26, and the bone position on the front fabric piece pre-lifts the pre-sensing plunger 218, driving the upper swing rod 24 to rotate clockwise by an angle, and the upper bone position detection sensor 22 is triggered;

[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, 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;

[0142] Step S44, the front and rear pieces of fabric continue to move forward, and when the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are not triggered, it means that the bone position of the front piece of fabric has passed the upper bone position detection sensor 22 and the bone position of the rear piece of fabric has passed the lower bone position detection sensor 23, and the electronic control module controls the sewing machine 105 to stop. In this way, by setting the pre-sensing plunger 218, the deceleration time of the overlock machine can be reduced after the upper bone position detection sensor 22 and the lower bone position detection sensor 23 both detect the bone position, and the forward movement distance of the front and rear pieces of fabric when the overlock machine decelerates is reduced, so as to avoid affecting the stitches at the sewing location due to the emergency stop of the overlock 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 which are successively distributed 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 straightly from left to right. The pre-sensing plunger 218 is mounted on the first mounting arm 241 by a fixing screw penetrating 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 penetrating through the second mounting adjustment slot 219 of the first mounting arm 241. The fixing screw in the second installation adjustment groove 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 groove 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 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 through the plunger fixing block 221 at its upper end, the upper detection plunger 26 is fixed to the second mounting arm 242 through the plunger fixing block 221 at its upper end, and the lower detection plunger 27 is fixed to the lower swing rod 25 through the plunger fixing block 221 at its upper end. In addition, 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 moving support bracket 31 and a moving driving source 32 installed on the moving support bracket 31. The detection component bracket 21 can be installed on the moving support bracket 31 so as to be movable forward and backward. The moving driving source 32 is connected to the detection component bracket 21 in a transmission manner and is connected to the electronic control module in a communication manner. During the forward movement of the front and rear cloth 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 cloth piece and the rear cloth piece 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 electric 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, thereby driving 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 electric 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 electric 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 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 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, and the output end of the screw motor has a motor nut that can move forward and backward, 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 forward and backward, and also drives the detection component bracket 21 and the detection unit 20 to move forward and backward as a whole. In addition, the detection point moving unit 30 also includes a first guide rail slider mechanism 36 extending forward and backward, and 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 forward and backward 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 moving support bracket 31, and an origin sensing sheet 35 fixed to the detection component bracket 21. The origin detection sensor 34 can sense the origin sensing sheet 35 and communicate with the electric control module. In the initial state, the origin detection sensor 34 senses the origin sensing sheet 35; when the mobile driving source 32 drives the detection unit 20 to move forward to find the bone position on the front and back pieces of cloth, the origin detection sensor 34 cannot sense the origin sensing sheet 35; then, the mobile driving source 32 drives the detection unit 20 to move backward and reset, until the origin detection sensor 34 senses the origin sensing sheet 35, and the electric control module determines that the mobile driving source 32 has been reset to the origin, and controls the mobile driving 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 driving source 42 mounted on the avoidance mounting plate 41, the avoidance mounting plate 41 is fixed to the equipment frame 103, the avoidance driving source 42 is connected to the mobile support bracket 31 by transmission, drives the mobile support bracket 31 to move in the direction of approaching or moving away from the front and back pieces of cloth, and the avoidance driving source 42 is connected to the electronic control module for communication. 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 driving source 42 to move, and the avoidance driving 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 conveys 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 driving source 42 is a cylinder and is fixed on 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 driving source 42, a fixed limit mounting bracket 44, a limit screw 45 threadedly screwed in the limit mounting bracket 44, and a buffer body 46 fixed at the right end of the limit screw 45. The mobile 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 is not moved forward to the bone position detection mechanism 101, the cylinder piston rod of the avoidance driving source 42 remains in a state of extending to the left, and at this 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, and also 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 the 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 also includes a second guide rail slider mechanism 47 extending straightly to the 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 Fig. 9 and Fig.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 movably 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 to drive 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 clamp the front piece of cloth and the back piece of cloth respectively 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 upper bone position adjustment drive source 61 and the upper clamping assembly 62, the upper bone position adjustment unit 60 also includes an upper deviation correction unit. Fig.11 As shown, the upper bone position adjustment driving source 61 is a screw motor, and the output end of the screw motor has a motor nut that can move forward and backward. The motor nut of the upper bone position adjustment driving source 61 is connected to the upper clamping assembly 62 through the upper deviation correction unit. When the feeding motor drives the feeding base 51 to move forward, the upper clamping assembly 62 and the front cloth piece clamped by it also move forward to realize the forward feeding of the front cloth piece; when automatically aligning the bone, the upper bone position adjustment driving source 61 drives the upper clamping assembly 62 to move forward and backward to adjust the front and rear position of the bone position on the front cloth piece to realize automatic alignment; the upper deviation correction unit is used to adjust the left and right position of the upper clamping assembly 62 to automatically correct the left and right position of the right edge of the front cloth piece.

[0155] Furthermore, if Fig.11 As shown, the upper bone position adjustment unit 60 also includes a first motor connecting seat 68, the upper bone position adjustment driving 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 motor 65 installed on the upper correction mounting plate 64, an upper correction gear 66 driven to rotate by the upper correction motor 65, and an upper correction rack 67 meshing 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 driving 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 Fig.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 driving source 83, the opening and closing driving 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 driving source 83 is fixedly connected with 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 releasing the cloth piece accordingly.

[0157] Preferably, if Fig.11 As shown, the upper bone position adjustment unit 60 also includes an upper micro switch 69 fixed on the first motor connection seat 68, and the upper micro switch 69 is arranged on the front side of the first nut connection plate 63. The upper micro switch 69 is connected to the electric control module for communication; when the upper bone position adjustment driving source 61 is at the origin, the first nut connection plate 63 just triggers the upper micro switch 69. In this way, in the process of adjusting the bone position of the front piece of cloth, the motor nut of the upper bone position adjustment driving source 61 is in a backward state, so that the first nut connection plate 63 is far away from the upper micro switch 69; after the bone position adjustment of the front piece of cloth is completed, the upper bone position adjustment driving source 61 needs to be reset, and the first nut connection plate 63 moves forward. When the upper micro switch 69 is abutted by the first nut connection plate 63 and is in a closed state, it means that the upper bone position adjustment driving source 61 is reset to the origin, and the electric control module can control the upper bone position adjustment driving source 61 to stop rotating.

[0158] In addition to the lower bone position adjustment drive source 71 and the lower clamping assembly 72, the lower bone position adjustment unit 70 also includes a lower deviation correction unit. Fig.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, and the output end of the screw motor has a motor nut that can move forward and backward, and 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 to move forward, the lower clamping assembly 72 and the rear cloth piece clamped by it also move forward to realize the forward feeding of the rear cloth piece; when automatically aligning the bone, the lower bone position adjustment drive source 71 drives the lower clamping assembly 72 to move forward and backward to adjust the front and rear position of the bone position on the rear cloth piece to realize automatic alignment; the lower correction unit is used to adjust the left and right position of the lower clamping assembly 72 to automatically correct the left and right position of the right edge of the rear cloth piece.

[0159] Furthermore, if Fig.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 to rotate by the lower correction motor 74, a lower correction rack 76 meshing 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 driving 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 driving source 71, and the lower clamping assembly 72 is installed on the second nut connecting plate 78.

[0160] Furthermore, if Fig.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 which can be opened and closed up and down, and an opening and closing driving source 83, the opening and closing driving 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 driving 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 Fig.12 As shown, the lower bone position adjustment unit 70 also includes a lower micro switch 79 fixed on the second motor connection seat 77, and the lower micro switch 79 is arranged on the front side of the second nut connecting plate 78. The lower micro switch 79 is connected to the electric control module for communication; when the lower bone position adjustment driving source 71 is at the origin, the second nut connecting plate 78 just triggers the upper micro switch 69. In this way, in the process of adjusting the bone position of the rear piece of cloth, the motor nut of the lower bone position adjustment driving source 71 is in a backward movement state, so that the second nut connecting plate 78 is away from the lower micro switch 79; after the bone position adjustment of the rear piece of cloth is completed, the lower bone position adjustment driving source 71 needs to be reset, and the second nut connecting plate 78 moves forward. When the lower micro switch 79 is abutted by the second nut connecting plate 78 and is in a closed state, it means that the lower bone position adjustment driving source 71 is reset to the origin, and the electric control module can control the lower bone position adjustment driving source 71 to stop rotating.

[0162] In this embodiment, the upper clamping assembly 62 and the lower clamping assembly 72 both adopt a clamping plate structure; of course, in other embodiments, the upper clamping assembly 62 and the lower clamping assembly 72 may 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 the present application is as follows.

[0164] 1. In the initial state, in the bone position detection mechanism 101, the cylinder piston rod of the avoidance driving source 42 remains in the state of extending to the left, and the avoidance connecting bracket 43 is in contact with the buffer body 46; the mobile driving source 32 is in the origin position, and the origin sensing sheet 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 motion, and the upper swing rod 24 and the lower swing rod 25 are both in the open state. In the bone position adjustment mechanism 102, the upper bone position adjustment driving source 61 and the lower bone position adjustment driving source 71 are both in their respective origins, the first nut connecting plate 63 is in its front limit position and is in contact with the upper micro switch 69, the second nut connecting plate 78 is in its front limit position and is in contact with the lower micro switch 79, and the upper micro switch 69 and the lower micro switch 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 , and the right edge of the rear piece of fabric is in the lower feeding channel, and the rear 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 rod 24 and the lower swing rod 25 are reset respectively and are in a closed state, the thickness of the upper material transfer 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 material transfer channel formed between the lower detection plunger 27 and the middle partition 28 is approximately the thickness of a layer of cloth.

[0167] 4. Sewing work is carried out, the front piece of cloth and the back piece of cloth are stacked up and down, and the feeding mechanism in the overlock machine drives the front piece of cloth and the back piece 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 rotation speed of the feeding motor matches the rotation speed of the overlock machine, that is, the feeding speed of the front piece of cloth and the back piece of cloth transported forward by the bone position adjustment mechanism 102 is always matched with the feeding speed of the overlock machine.

[0168] 5. As sewing proceeds, the bone of the front piece of fabric will pre-uplift the pre-sensing plunger 218 during the forward process, driving the upper swing rod 24 to rotate clockwise by an angle, and the upper bone detection sensor 22 will be triggered, then the electronic control module controls the overlock sewing machine to slow down and the feeding motor to slow down, and the front and rear pieces of fabric continue to move forward. Afterwards, the bone of the rear piece of fabric will push down the lower detection plunger 27 during the forward process, driving the lower swing rod 25 to rotate counterclockwise by an angle, and the lower bone detection sensor 23 will be triggered; then, as the feeding continues, the front and rear pieces of fabric continue to move forward, when both the upper bone detection sensor 22 and the lower bone detection sensor 23 have no signal, the electronic control module controls the overlock sewing machine to stop, and the feeding motor to stop, at this time, the bone on the front piece of fabric has passed the upper detection plunger 26 forward, and the bone on the rear piece of fabric has passed the lower detection plunger 27 forward.

[0169] 6. The electric 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 positions on the front piece of cloth and 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 electric 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] Case 1: The upper bone position detection sensor 22 is triggered first, indicating that the bone position on the front piece of cloth is aligned with the upper detection plunger 26, but the bone position on the back piece of cloth is still located in front of the lower detection plunger 27. At this time, the electric control module controls the lower bone position adjustment drive source 71 to rotate, and the lower bone position adjustment drive source 71 drives the lower clamping assembly 72 to move backward, and the lower clamping assembly 72 drives the clamped back piece of cloth to move backward until the lower bone position detection sensor 23 is triggered, and the bone position on the back piece of cloth is aligned with the lower detection plunger 27; and the upper detection plunger 26 and the lower detection plunger 27 are aligned up and down, which makes the bone position on the front piece of cloth aligned with the bone position on the back piece of cloth, realizing automatic bone alignment.

[0171] Case 2: The lower bone position detection sensor 23 is triggered first, indicating that the bone position on the rear piece of cloth is aligned with the lower detection plunger 27, but the bone position on the front piece of cloth is still located in front of the upper detection plunger 26. At this time, the electric control module controls the upper bone position adjustment drive source 61 to rotate, and the upper bone position adjustment drive source 61 drives the upper clamping assembly 62 to move backward, and the upper clamping assembly 62 drives the front piece of cloth clamped by it to move backward until the upper bone position detection sensor 22 is triggered, and the bone position on the front piece of cloth is aligned with the upper detection plunger 26; and the upper detection plunger 26 and the lower detection plunger 27 are aligned up and down, which makes the bone position on the front piece of cloth aligned with the bone position on the rear piece of cloth, realizing 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 actuated, 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 both away from the front piece of cloth, and the lower detection plunger 27 is away from the rear piece of cloth; thereafter, the electronic control module controls the mobile drive source 32 to reset until the origin detection sensor 34 is triggered.

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

[0174] 9. After the front and rear 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 schematic diagram of 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 during the bone alignment process as an example. Fig.13 As shown in a, the bone position has not passed the pre-sensing plunger 218 forward, and the upper bone position detection sensor 22 has not been triggered, and 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 in the direction close to the pre-sensing plunger 218. When the bone position contacts the pre-sensing plunger 218, as shown in FIG. Fig.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 Fig.13 c, 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 find the bone position, the upper detection plunger 26 first contacts the bone position, such as Fig.13 As shown in FIG. 4 , 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. In the process of sewing cloth pieces, the automatic bone alignment of the front and back pieces of cloth can be completed quickly and accurately. By replacing manual bone alignment with automation, the operation requirements for employees are reduced while ensuring the bone alignment accuracy. The bone alignment accuracy is high and stable, which improves the quality of double-piece stitching, reduces the time and manpower consumed, 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 influence on the sewing stitches of the fabric itself is reduced by controlling the sewing speed of the sewing machine 105 to achieve the same stitch effect as manual sewing, and also shorten the subsequent automated bone alignment steps and time.

[0180] 3. By configuring the detection point moving unit 30 to automatically find the bone position, the amount of bone position adjustment can be reduced, and the bone alignment work can be completed with a very small displacement. The accurate positioning of the bone position can be ensured to compensate for the positioning position deviation caused by the non-instantaneous deceleration of the sewing machine 105 during a single detection and positioning, thereby enhancing the bone effect, reducing the stretching of the cloth 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, better quality and more competitive in the market than manual ones.

[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 familiar with 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 a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An automatic bone alignment sewing method, characterized in that: 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 fixedly arranged 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 rear pieces of fabric; the bone position detection mechanism (101) comprises a detection component bracket (21), and an upper bone position detection sensor (21) arranged vertically opposite to each other. 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 rear 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 drive source (61) and / or the lower bone position adjustment drive 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 sewing 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 transmission-connected to the detection component bracket (21) and is communication-connected to 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, and the electric control module controls the mobile driving source (32) to stop moving, and controls the upper bone position adjustment driving source (61) or the lower bone position adjustment driving 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 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 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 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 assembly (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 sewing 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); 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 face each other up and down; an upper material passage for allowing a front piece of cloth to pass through is formed between the lower end of the upper detection plunger (26) and the middle partition (28); a lower material passage for allowing a 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 sewing method according to claim 3, characterized in that: The bone position detection mechanism (101) further comprises a pre-sensing plunger (218), wherein the pre-sensing plunger (218) is mounted on one end of the upper swing rod (24), and the pre-sensing plunger (218) and the upper detection plunger (26) are successively distributed along the feeding direction of the front and rear cloth pieces; The step S4 comprises the following sub-steps in sequence: S41, during the process of the front and rear cloth pieces moving forward, 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 electric 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 sewing method according to claim 1, characterized in that: The bone position adjustment mechanism (102) further comprises 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, driving the feeding base (51) to move forward, so that the upper clamping assembly (62) and the lower clamping assembly (72) respectively clamp the front piece of cloth and the rear 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 sewing method according to claim 5, characterized in that: The bone position detection mechanism (101) further comprises an avoidance unit (40), the avoidance unit (40) comprising 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 transmission-connected to the movable support bracket (31) to drive the movable support bracket (31) to move in a direction close to or away from the seam platform (104), and the avoidance driving source (42) being communication-connected to 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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