Double-piece abutted seam bone aligning device and double-piece abutted seam system

Abstract

The invention provides a double-piece seam splicing and bone aligning device and a double-piece seam splicing system. The double-piece seam splicing and bone aligning device comprises an electric control module, a bone position detecting mechanism and a bone position adjusting mechanism. The bone position detection mechanism comprises a detection assembly support, an upper bone position detection sensor and a lower bone position detection sensor, and the upper bone position detection sensor and the lower bone position detection sensor are both installed on the detection assembly support and are arranged up and down in the stacking direction of the front cloth piece and the rear cloth piece. The bone position adjusting mechanism comprises an upper bone position adjusting driving source, an upper clamping assembly used for clamping the front cloth piece, a lower bone position adjusting driving source and a lower clamping assembly used for clamping the rear cloth piece, and the upper bone position adjusting driving source is in transmission connection with the upper clamping assembly and drives the upper clamping assembly to move front and back; the lower bone position adjusting driving source is in transmission connection with the lower clamping assembly and drives the lower clamping assembly to move front and back. According to the method, automatic, rapid and accurate bone alignment during double-piece splicing is achieved, the bone alignment precision is reliably guaranteed, and the double-piece splicing quality and efficiency are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewing equipment, in particular to a double-piece seaming bone-aligning device and a double-piece seaming system comprising the double-piece seaming bone-aligning device. 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 alignment of the front and back pieces of fabric is mainly dependent on manual observation and manual adjustment for manual alignment correction, which places high demands on the workers' skill proficiency and requires manufacturers to spend a certain amount of time to cultivate the workers' skill proficiency; in addition, the alignment accuracy is high, ±3mm. As manufacturers increase their requirements for sewing quality, the difficulty of the manual alignment process continues to increase, and the alignment accuracy is difficult to be reliably guaranteed, ultimately reducing production quality and efficiency. 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 a double-piece joint bone alignment device that can perform automatic bone alignment.

[0005] To achieve the above-mentioned purpose, the present invention provides a double-piece joint bone alignment device, comprising an electric control module, a bone position detection mechanism and a bone position adjustment mechanism;

[0006] The bone position detection mechanism includes a detection component bracket, and an upper bone position detection sensor and a lower bone position detection sensor both mounted on the detection component bracket, wherein the upper bone position detection sensor and the lower bone position detection sensor are arranged up and down along the stacking direction of the front and back fabric pieces, wherein the upper bone position detection sensor is used to detect the bone position on the front fabric piece, and the lower bone position detection sensor is used to detect the bone position on the back fabric piece;

[0007] The bone position adjustment mechanism includes an upper bone position adjustment driving source, an upper clamping assembly for clamping the front piece of cloth, a lower bone position adjustment driving source, and a lower clamping assembly for clamping the rear piece of cloth, the upper bone position adjustment driving source is transmission-connected with the upper clamping assembly, and is used to drive the upper clamping assembly to move forward and backward along the feeding direction of the front piece of cloth, and the lower bone position adjustment driving source is transmission-connected with the lower clamping assembly, and is used to drive the lower clamping assembly to move forward and backward along the feeding direction of the rear piece of cloth;

[0008] The upper bone position detection sensor, the lower bone position detection sensor, the upper bone position adjustment driving source and the lower bone position adjustment driving source are all communicatively connected with the electric control module.

[0009] 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.

[0010] Furthermore, the bone position detection mechanism also includes an upper push rod bracket and a lower push rod bracket both fixed to the detection component bracket, an upper push rod assembly installed on the upper push rod bracket, and a lower push rod assembly installed on the lower push rod bracket; the upper push rod assembly includes a cylinder, and an upper push block installed on the lower end of the cylinder piston rod, and the upper push block abuts against the upper side of the upper swing rod; the lower push rod assembly includes a cylinder, and a lower push block installed on the upper end of the cylinder piston rod, and the lower push block abuts against the lower side of the lower swing rod.

[0011] Furthermore, the bone position detection mechanism also includes a pre-sensing plunger, which is installed at one end of the upper swing rod, and the pre-sensing plunger and the upper detection plunger are distributed in sequence along the feeding direction of the front cloth piece.

[0012] Furthermore, the bone position detection mechanism also includes a detection point moving unit, which includes a mobile support bracket and a mobile driving source installed on the mobile support bracket. The detection component bracket can be installed on the mobile support bracket so as to be movably moved forward and backward. The mobile driving source is transmission-connected to the detection component bracket and communication-connected to the electronic control module.

[0013] Furthermore, the detection point moving unit also includes an origin detection sensor fixed to the movable support bracket, and an origin sensing sheet fixed to the detection component bracket. The origin detection sensor can sense the origin sensing sheet and communicate with the electronic control module.

[0014] Furthermore, the bone position detection mechanism further includes an avoidance unit, the avoidance unit including a fixed avoidance mounting plate and an avoidance driving source mounted on the avoidance mounting plate, the avoidance driving source being transmission-connected to the movable support bracket to drive the movable support bracket to move toward or away from the front and rear cloth pieces;

[0015] When the avoidance driving source drives the movable support bracket to move away from the front and rear cloth pieces, an avoidance area for allowing the upper clamping assembly and the lower clamping assembly to pass through is formed between the movable support bracket and the front and rear cloth pieces.

[0016] Furthermore, the upper clamping assembly and the lower clamping assembly both include a pair of upper clamping plates and lower clamping plates that can be opened and closed up and down, and an opening and closing driving source, and the opening and closing driving source is drivingly connected to the upper clamping plate and / or the lower clamping plate.

[0017] Furthermore, the upper bone position adjustment drive source and the lower bone position adjustment drive source are both screw motors, the output end of the screw motor has a motor nut that can move forward and backward, the upper clamping assembly is connected to the motor nut of the upper bone position adjustment drive source, and the lower clamping assembly is connected to the motor nut of the lower bone position adjustment drive source.

[0018] Furthermore, the bone position adjustment mechanism also includes an upper correction unit, which includes a first nut connecting plate, an upper correction mounting plate fixed to the first nut connecting plate, an upper correction motor installed on the upper correction mounting plate, an upper correction gear driven to rotate by the upper correction motor, and an upper correction rack meshing with the upper correction gear. The first nut connecting plate is fixedly connected to the motor nut of the upper bone position adjustment drive source, and the upper correction rack extends straight left and right in a direction perpendicular to the moving direction of the motor nut, and the upper clamping assembly is installed on the upper correction rack.

[0019] Furthermore, the bone position adjustment mechanism also includes a first motor connecting seat and an upper micro switch fixed on the first motor connecting seat, the upper bone position adjustment drive source is installed on the first motor connecting seat, the first nut connecting plate can trigger the upper micro switch, and the upper micro switch is communicatively connected to the electronic control module.

[0020] Furthermore, the bone position adjustment mechanism also includes a lower correction unit, which includes a lower correction mounting plate, a lower correction motor installed on the lower correction mounting plate, a lower correction gear driven to rotate by the lower correction motor, a lower correction rack meshing with the lower correction gear, a second motor connecting seat fixed to the lower correction rack, and a second nut connecting plate, the lower bone position adjustment drive source is installed on the second motor connecting seat, the second nut connecting plate is fixedly connected to the motor nut of the lower bone position adjustment drive source, and the lower clamping assembly is installed on the second nut connecting plate.

[0021] Furthermore, the bone position adjustment mechanism also includes a lower micro switch fixed on the second motor connecting seat, the second nut connecting plate can trigger the lower micro switch, and the lower micro switch is communicatively connected to the electric control module.

[0022] The present invention also provides a double-piece seaming system, comprising a fixed equipment frame, a sewing table fixed on the equipment frame, a sewing machine installed on the equipment frame, and the double-piece seaming bone alignment device as described above, wherein the bone position detection mechanism is installed on the equipment frame, and the bone position adjustment mechanism can be installed on the equipment frame movably forward and backward, and the bone position adjustment mechanism, the bone position detection mechanism and the sewing machine are distributed in sequence along the feeding direction of the front piece of cloth.

[0023] As described above, the double-piece joint bone alignment device and double-piece joint system according to the present invention have the following beneficial effects:

[0024] The present application detects the bone positions on the front and rear cloth pieces through a bone position detection mechanism, and then uses a bone position adjustment mechanism to drive the front and rear cloth pieces to move forward and backward respectively, so that the bone positions of the front and rear cloth pieces are strictly aligned, thereby achieving automatic, rapid and accurate bone alignment when the two pieces are spliced, reliably ensuring the bone alignment accuracy, and effectively improving the quality and efficiency of the two-piece splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the double-piece seam system in this application.

[0026] Figure 2 This is a structural diagram of the bone position detection mechanism in this application.

[0027] Figure 3 and Figure 4 for Figure 2 Schematic diagram of the structure in different states after omitting the detection point moving unit and the avoidance unit.

[0028] Figure 5 for Figure 2 Schematic diagram of the connection between the middle upper swing rod, upper detection plunger and pre-sensing plunger.

[0029] Figure 6 for Figure 2 Schematic diagram of the connection between the middle lower swing rod and the lower detection plunger.

[0030] Figure 7 for Figure 2 Schematic diagram of the structure of the detection point moving unit and the avoidance unit.

[0031] Figure 8 and Fig. 9 Schematic diagram of the structure of the bone position adjustment mechanism in this application at different viewing angles.

[0032] Fig.10 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.

[0033] Fig.11 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.

[0034] Component number description

[0035] 101 Bone Position Detection Agency

[0036] 102 Bone adjustment mechanism

[0037] 103 Equipment racks

[0038] 104 Sewing table

[0039] 105 Sewing machine

[0040] 20 Detection Units

[0041] 21. Detection component bracket

[0042] 22 Upper bone position detection sensor

[0043] 23 Lower bone position detection sensor

[0044] 24 Upswing

[0045] 241 First mounting arm

[0046] 242 Second mounting arm

[0047] 25 Downswing

[0048] 26 Upper detection plunger

[0049] 27 Lower detection plunger

[0050] 28 Middle partition

[0051] 29 Upper push rod bracket

[0052] 210 Lower push rod bracket

[0053] 211 upper ejector assembly

[0054] 212 Lower ejector assembly

[0055] 213 Top Block

[0056] 214 Lower top block

[0057] 215 Upper sensor mounting plate

[0058] 216 Lower sensor mounting plate

[0059] 217 First installation adjustment slot

[0060] 218 Pre-sensing plunger

[0061] 219 Second installation adjustment slot

[0062] 220 Contour Screws

[0063] 221 Plunger fixing block

[0064] 30 detection point moving unit

[0065] 31 Mobile support bracket

[0066] 32 Mobile drive source

[0067] 33 Nut connection bracket

[0068] 34 Origin detection sensor

[0069] 35 origin sensor

[0070] 36 First guide rail slider mechanism

[0071] 40 Avoidance Units

[0072] 41 Avoid mounting plate

[0073] 42 Avoidance drive source

[0074] 43 Avoidance connection bracket

[0075] 44 Limit mounting bracket

[0076] 45 Limit screw

[0077] 46 Buffer

[0078] 47 Second guide rail slider mechanism

[0079] 50 Feeding moving unit

[0080] 51 Feeding base

[0081] 52 Third guide rail slider mechanism

[0082] 60 Upper bone adjustment unit

[0083] 61 Upper bone position adjustment drive source

[0084] 62 Upper clamping assembly

[0085] 63 First nut connecting plate

[0086] 64 Upper deviation correction mounting plate

[0087] 65 Upper deviation correction motor

[0088] 66 Upper deviation correcting gear

[0089] 67 Upper deflection correction rack

[0090] 68 First motor connection seat

[0091] 69 Upper micro switch

[0092] 610 splint fixing block

[0093] 70 Lower bone adjustment unit

[0094] 71 Lower bone position adjustment drive source

[0095] 72 Lower clamping assembly

[0096] 73 Lower guide plate

[0097] 74 Lower deviation correction motor

[0098] 75 Lower deviation correcting gear

[0099] 76 Lower guide rack

[0100] 77 Second motor connection seat

[0101] 78 Second nut connecting plate

[0102] 79 Lower micro switch

[0103] 81 Upper splint

[0104] 82 Lower splint

[0105] 83 Opening and closing drive source DETAILED DESCRIPTION

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] The present application provides a double-piece stitching device and a double-piece stitching system including the double-piece stitching device, which are used to stitch the front and back pieces of fabric. For the convenience of description, in the following embodiments, the definitions of the directions are as follows: the moving direction of the front and back pieces of fabric during sewing is defined as the front direction, which is also the feeding direction of the front and back pieces of fabric; the stacking direction of the front and back pieces of fabric is defined as the up-down direction, and in this embodiment, the front piece of fabric is on the top and the back piece of fabric is on the bottom; the direction orthogonal to the front-to-back direction and the up-down direction is defined as the left-right direction.

[0111] like Figure 1As shown, the double-piece seaming system involved in the present application includes a fixed equipment frame 103, a sewing table 104 fixed on the equipment frame 103, a sewing machine 105 installed on the equipment frame 103, and a double-piece seaming bone alignment device, the double-piece seaming bone alignment device includes an electronic control module, a bone position detection mechanism 101 and a bone position adjustment mechanism 102, the bone position detection mechanism 101 is installed on the equipment frame 103, the bone position adjustment mechanism 102 can be installed on the equipment frame 103 movably forward and backward, 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 piece of cloth, that is, the bone position adjustment mechanism 102, the bone position detection mechanism 101 and the sewing machine 105 are distributed in sequence from back to front, and are all arranged on the right edge side of the seaming table 104. In this embodiment, the type of sewing machine 105 is an overlock machine; the bone position adjustment mechanism 102 is used not only for adjusting the bone positions of the front and rear cloth pieces, but also for feeding the front and rear cloth pieces forward.

[0112] like Figure 2 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 both mounted on the detection component bracket 21. The upper bone position detection sensor 22 and the lower bone position detection sensor 23 are arranged up and down along the stacking direction of the front and back pieces of cloth. The upper bone position detection sensor 22 is used to detect the bone position on the front piece of cloth, and the lower bone position detection sensor 23 is used to detect the bone position on the back piece of cloth. Figure 8 and Fig. 9 As shown, the bone position adjustment mechanism 102 includes an upper bone position adjustment drive source 61, an upper clamping assembly 62 for clamping the front piece of cloth, a lower bone position adjustment drive source 71, and a lower clamping assembly 72 for clamping the rear piece of cloth. The upper bone position adjustment drive source 61 is transmission-connected with the upper clamping assembly 62 to drive the upper clamping assembly 62 to move forward and backward along the feeding direction of the front piece of cloth, and the lower bone position adjustment drive source 71 is transmission-connected with the lower clamping assembly 72 to drive the lower clamping assembly 72 to move forward and backward along the feeding direction of the rear piece of cloth. 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 communication-connected with the electric control module.

[0113] In the double-piece seam bone alignment device involved in the present application, the upper bone position detection sensor 22 and the lower bone position detection sensor 23 detect the bone position on the front piece of cloth and the bone position on the back piece of cloth respectively; in the bone position adjustment mechanism 102, the upper bone position adjustment driving source 61 drives the upper clamping component 62 and the front piece of cloth clamped by the upper clamping component 62 to move forward and backward, which can adjust the front and back position of the bone position on the front piece of cloth; the lower bone position adjustment driving source 71 drives the lower clamping component 72 and the back piece of cloth clamped by the lower clamping component 72 to move forward and backward, which can adjust the front and back position of the bone position on the back piece of cloth. The electric control module controls the actions of the upper bone position adjustment driving source 61 and the lower bone position adjustment driving source 71, combined with the feedback of the upper bone position detection sensor 22 and the lower bone position detection sensor 23, so as to strictly align the bone position of the front piece of cloth and the bone position of the back piece of cloth, realize automatic, fast and accurate bone alignment during double-piece seam, reliably ensure the bone alignment accuracy, and effectively improve the quality and efficiency of double-piece seam.

[0114] In the above-mentioned double-piece seam bone alignment device, 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. In addition, the bone position detection mechanism 101 is an adaptive bone position detection mechanism, which can adapt to the bone positions on the front and back pieces of cloth, that is, it can automatically find the bone positions 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. The following describes the preferred structures of the bone position detection mechanism 101 and the bone position adjustment mechanism 102.

[0115] Bone Position Detection Mechanism 101

[0116] like Figure 2 As 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.

[0117] like Figures 3 to 6As 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.

[0118] 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 3 As 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 4As 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.

[0119] Furthermore, if Figure 3 and Figure 4 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 3 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 3 As 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 4 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 4 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.

[0120] 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.

[0121] 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 3 and Figure 4 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.

[0122] Furthermore, if Figures 3 to 5As 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 distributed in sequence along the feeding direction of the front piece of fabric, that is, the pre-sensing plunger 218 is distributed directly behind the upper detection plunger 26. During the forward movement of the front and rear pieces of fabric during sewing, the pre-sensing plunger 218 will contact the bone position of the front piece of fabric first compared to the upper detection plunger 26, driving the upper swing rod 24 to rotate clockwise through an angle, and the upper bone position detection sensor 22 is triggered. At this time, the electric control module will control the overlock sewing machine to slow down sewing; when both the upper bone position detection sensor 22 and the lower bone position detection sensor 23 are triggered, the electric control module will control the overlock sewing machine to stop sewing. In this way, by setting the pre-sensing plunger 218, the deceleration time of the overlock 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, thereby reducing the forward movement distance of the front and rear cloth pieces when the overlock machine decelerates, thereby avoiding affecting the stitches at the sewing location due to the sudden stop of the overlock machine.

[0123] Furthermore, if Figure 5 and Figure 6 As 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.

[0124] Preferably, if Figure 5 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.

[0125] Furthermore, if Figure 7 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, the electronic control module controls the overlock sewing machine to stop. After that, the electronic control module controls the moving driving source 32 to operate. The moving driving source 32 drives the detection component bracket 21 to move forward, and 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 detects the bone position again, thereby adapting to the bone positions on the front and rear cloth pieces.

[0126] Preferably, if Figure 7 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.

[0127] Furthermore, if Figure 7 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.

[0128] Furthermore, if Figure 7As shown, the avoidance unit 40 includes a fixed avoidance mounting plate 41 and a avoidance driving source 42 installed on the avoidance mounting plate 41, the avoidance mounting plate 41 is fixed to the equipment frame 103, and the avoidance driving source 42 is connected to the movable support bracket 31 in a transmission connection, driving the movable support bracket 31 to move toward or away from the front and rear pieces of cloth; when the avoidance driving source 42 drives the movable support bracket 31 away from the front and rear pieces of cloth, an avoidance area allowing the upper clamping assembly 62 and the lower clamping assembly 72 to pass through is formed between the movable support bracket 31 and the front and rear pieces of cloth, ensuring that the bone position adjustment mechanism 102 transports the front and rear pieces of cloth forward to the overlock machine.

[0129] Furthermore, if Figure 2 and Figure 7 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.

[0130] Preferably, if Figure 7 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.

[0131] Bone position adjustment mechanism 102

[0132] like Figure 8 and Fig. 9As 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; 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.

[0133] 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.10 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.

[0134] Furthermore, if Fig.10 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.

[0135] Furthermore, if Fig.10As 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.

[0136] Preferably, if Fig.10 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.

[0137] 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.11 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.

[0138] Furthermore, if Fig.11As 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.

[0139] Furthermore, if Fig.11 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.

[0140] Preferably, if Fig.11 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.

[0141] In summary, the bone alignment process of the double-piece stitching system involved in the present application is as follows.

[0142] 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.

[0143] 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 .

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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. 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] In summary, this application has the following advantages:

[0155] 1. During the sewing process of the cloth pieces, the automatic bone alignment of the front and back pieces of cloth can be completed quickly and accurately, with high bone alignment accuracy, which effectively improves the quality of double-piece seam stitching; by replacing manual bone alignment with automation, it effectively reduces the time and manpower consumed and improves production efficiency.

[0156] 2. It can be applied to the fabric pieces with different lengths and sizes, reducing the limitation of the double-piece stitching device on the sewing work of the equipment.

[0157] 3. Reduce the amount of bone adjustment by automatically finding the bone position, complete the bone alignment with a very small displacement, and ensure the beauty of the sewing seams at the bone position.

[0158] 4. The bone accuracy is controlled within ±1mm, which is more stable, better quality and more competitive in the market than manual ones.

[0159] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0160] 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. A double-piece joint bone-aligning device, characterized in that: It comprises an electric control module, a bone position detection mechanism (101) and a bone position adjustment mechanism (102); 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) both mounted on the detection component bracket (21); the upper bone position detection sensor (22) and the lower bone position detection sensor (23) are arranged up and down along the stacking direction of the front and back pieces of cloth; the upper bone position detection sensor (22) is used to detect the bone position on the front piece of cloth, and the lower bone position detection sensor (23) is used to detect the bone position on the back piece of cloth; the bone position adjustment mechanism (102) comprises an upper A bone position adjustment driving source (61), an upper clamping assembly (62) for clamping a front piece of cloth, a lower bone position adjustment driving source (71), and a lower clamping assembly (72) for clamping a rear piece of cloth, wherein the upper bone position adjustment driving source (61) is transmission-connected with the upper clamping assembly (62) for driving the upper clamping assembly (62) to move forward and backward along the feeding direction of the front piece of cloth, and the lower bone position adjustment driving source (71) is transmission-connected with the lower clamping assembly (72) for driving the lower clamping assembly (72) to move forward and backward along the feeding direction of the rear piece of cloth; 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 electric control module.

2. The double-piece joint bone-aligning device according to claim 1, 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).

3. The double-piece joint bone-aligning device according to claim 2, characterized in that: The bone position detection mechanism (101) further comprises an upper push rod bracket (29) and a lower push rod bracket (210) both fixed to the detection component bracket (21), an upper push rod assembly (211) mounted on the upper push rod bracket (29), and a lower push rod assembly (212) mounted on the lower push rod bracket (210); the upper push rod assembly (211) comprises a cylinder and an upper push block (213) mounted on the lower end of the cylinder piston rod, the upper push block (213) abuts against the upper side of the upper swing rod (24); the lower push rod assembly (212) comprises a cylinder and a lower push block (214) mounted on the upper end of the cylinder piston rod, the lower push block (214) abuts against the lower side of the lower swing rod (25).

4. The double-piece joint bone-aligning device according to claim 2, 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 sequentially distributed along the feeding direction of the front cloth piece.

5. The double-piece joint bone-aligning device according to claim 1, characterized in that: The bone position detection mechanism (101) further comprises a detection point moving unit (30), the detection point moving unit (30) comprising a movable support bracket (31) and a movable driving source (32) mounted on the movable support bracket (31), the detection component bracket (21) being mounted on the movable support bracket (31) so as to be movable forward and backward, the movable driving source (32) being transmission-connected to the detection component bracket (21) and being communication-connected to the electric control module.

6. The double-piece joint bone-aligning device according to claim 5, characterized in that: The detection point moving unit (30) further comprises 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 is in communication connection with the electric control module.

7. The double-piece joint bone-aligning device 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 in transmission connection with the movable support bracket (31) to drive the movable support bracket (31) to move in a direction approaching or away from the front and rear cloth pieces; When the avoidance driving source (42) drives the movable support bracket (31) away from the front and rear cloth pieces, an avoidance area is formed between the movable support bracket (31) and the front and rear cloth pieces, allowing the upper clamping assembly (62) and the lower clamping assembly (72) to pass through.

8. The double-piece joint bone-aligning device according to claim 1, characterized in that: The upper clamping assembly (62) and the lower clamping assembly (72) both comprise a pair of upper clamping plates (81) and lower clamping plates (82) that can be opened and closed, and an opening and closing driving source (83), wherein the opening and closing driving source (83) is drivingly connected to the upper clamping plates (81) and / or the lower clamping plates (82).

9. The double-piece joint bone-aligning device according to claim 1, characterized in that: The upper bone position adjustment drive source (61) and the lower bone position adjustment drive source (71) are both screw motors, and the output end of the screw motor has a motor nut that can move forward and backward. The upper clamping component (62) is connected to the motor nut of the upper bone position adjustment drive source (61), and the lower clamping component (72) is connected to the motor nut of the lower bone position adjustment drive source (71).

10. The double-piece joint bone alignment device according to claim 9, characterized in that: The bone position adjustment mechanism (102) also includes an upper correction unit, which 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) mounted 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) meshed 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 mounted on the upper correction rack (67).

11. The double-piece joint bone-aligning device according to claim 10, characterized in that: The bone position adjustment mechanism (102) also includes a first motor connection seat (68), and an upper micro switch (69) fixed on the first motor connection seat (68), the upper bone position adjustment drive source (61) is installed on the first motor connection seat (68), the first nut connecting plate (63) can trigger the upper micro switch (69), and the upper micro switch (69) is communicatively connected to the electric control module.

12. The double-piece joint bone-aligning device according to claim 9, characterized in that: The bone position adjustment mechanism (102) also includes a lower correction unit, which includes a lower correction mounting plate (73), a lower correction motor (74) mounted 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) meshed 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 bone position adjustment drive source (71) is mounted 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 mounted on the second nut connecting plate (78).

13. The double-piece joint bone-aligning device according to claim 12, characterized in that: The bone position adjustment mechanism (102) further comprises a lower micro switch (79) fixed on the second motor connection seat (77), the second nut connection plate (78) can trigger the lower micro switch (79), and the lower micro switch (79) is communicatively connected to the electric control module.

14. A double-piece stitching system, comprising a fixedly arranged equipment frame (103), a sewing table (104) fixed on the equipment frame (103), and a sewing machine (105) installed on the equipment frame (103), characterized in that: It also includes the double-piece seaming bone alignment device as described in any one of claims 1 to 13, wherein the bone position detection mechanism (101) is installed on an equipment frame (103), and the bone position adjustment mechanism (102) is installed on the equipment frame (103) so as to be movable forward and backward, and 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 piece of cloth.

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