Airbag drawstring sewing machine

Abstract

The present invention relates to the technical field of drawstring sewing, and in particular to a drawstring sewing machine for an airbag, wherein a frame is provided with an unwinding mechanism, a cutting mechanism, a cloth tape folding mechanism, a fabric positioning mechanism and a sewing machine body in sequence along the length direction; a sewing jig assembly is connected to the sewing machine body; a transfer manipulator and a fabric storage rack are provided on the frame; a fabric conveying mechanism for placing a piece of fabric on the fabric storage rack into the fabric positioning mechanism is provided on the frame; the transfer manipulator conveys the cloth tape on the cloth tape folding mechanism to the fabric positioning mechanism; the transfer manipulator conveys the cloth tape and the fabric positioned on the fabric positioning mechanism to the sewing jig assembly together. When the present invention is used, the automatic feeding, positioning and sewing of the cloth tape and the fabric can be realized in the drawstring sewing machine structure, thereby improving the efficiency of drawstring sewing and reducing labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of drawstring sewing, in particular to a drawstring sewing machine for a safety airbag. Background Art

[0002] The airbag is a safety device that protects the occupants inside the car. The function of the drawstring is to control the maximum buffer distance of the airbag. The cloth tape is generally used in conjunction with the fabric, and the cloth tape is connected to the airbag through the fabric. The fabric is generally fixed to the cloth tape by sewing to form a drawstring structure. In the existing sewing of the drawstring structure, the drawstring is directly cut to a set length by manual cutting, and then the prepared fabric is put in, and then the fabric and the cloth tape are manually sewn by a sewing machine. The sewing efficiency is low, and the sewing alignment of the fabric and the cloth tape during sewing depends on manual alignment, and the sewing quality of the drawstring is unstable. Summary of the invention

[0003] The object of the present invention is to provide a drawstring sewing machine for an airbag in view of the defects and shortcomings of the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention discloses a drawstring sewing machine for an airbag, which comprises a frame; the frame is provided with an unwinding mechanism, a cutting mechanism, a cloth tape folding mechanism, a fabric positioning mechanism and a sewing machine body in sequence along the length direction; the sewing machine body is connected with a sewing jig assembly; the frame is provided with a transfer manipulator and a fabric storage rack; the frame is provided with a fabric conveying mechanism for placing a piece of fabric on the fabric storage rack into the fabric positioning mechanism; the transfer manipulator conveys the cloth tape on the cloth tape folding mechanism to the fabric positioning mechanism; the transfer manipulator conveys the cloth tape and the fabric positioned on the fabric positioning mechanism to the sewing jig assembly together.

[0006] Furthermore, the cloth belt folding mechanism includes a cloth belt clamping claw cylinder, a sliding seat and a motor; a driven pulley is rotatably connected to the sliding seat; a connecting shaft is fixed to the driven pulley; the cloth belt clamping claw cylinder is fixed to the connecting shaft; one end of the motor is fixed to the sliding seat; a driving pulley is fixed to the other end of the motor; a belt is tensioned between the driving pulley and the driven pulley; and a third U-shaped clamp is fixed to both clamping toes of the cloth belt clamping claw cylinder.

[0007] Furthermore, a guide rail is fixed on the frame; a sliding block slidably connected to the guide rail is fixed at the bottom of the sliding seat; and a translation cylinder is connected between the sliding seat and the frame.

[0008] Furthermore, the fabric conveying mechanism includes a fabric translation linear module, a fabric lifting linear module and a suction nozzle; one end of the fabric translation linear module is fixed on the frame; the other end of the fabric translation linear module is fixed on one end of the fabric lifting linear module; the suction nozzle is fixed on the other end of the fabric lifting linear module.

[0009] Furthermore, the transfer robot includes a transfer longitudinal linear module, a transfer lifting linear module and a transfer transverse linear module; one end of the transfer transverse linear module is fixed on the frame; the other end of the transfer transverse linear module is fixed on one end of the transfer lifting linear module; the other end of the transfer lifting linear module is fixed on one end of the transfer longitudinal linear module; the other end of the transfer longitudinal linear module is fixed with a transfer clamp cylinder; transfer clamps are fixed on both clamping toes of the transfer clamp cylinder.

[0010] Furthermore, the number of the transfer jaw cylinders is two; the transfer jaw cylinders are arranged along the length direction of the transfer transverse linear module;

[0011] The transfer clamping plate on the first transfer clamping jaw cylinder is the first transfer clamping plate; the transfer clamping plate on the second transfer clamping jaw cylinder is the second transfer clamping plate; the gap between the second transfer clamping plate and the first transfer clamping plate is the first gap;

[0012] A cloth belt correcting mechanism is fixed on the frame; the cloth belt correcting mechanism includes a correcting lifting cylinder and a correcting clamping cylinder; the two ends of the correcting lifting cylinder are respectively connected to the frame and the correcting clamping cylinder; a second U-shaped clamping plate is fixed on both clamping toes of the correcting clamping cylinder; the width of the second U-shaped clamping plate is smaller than the first gap.

[0013] Furthermore, the fabric positioning mechanism includes a positioning lifting cylinder with one end fixed on the frame, a positioning lifting plate fixed on the other end of the positioning lifting cylinder, and a positioning clamping claw cylinder fixed on the positioning lifting plate; the first positioning template and the second positioning template are respectively arranged on the two clamping toes of the positioning clamping claw cylinder; the front surface of the first positioning template is provided with a through hole.

[0014] Furthermore, an extension cylinder is fixed on the positioning lifting plate; a clamping cloth belt cylinder is fixed to the piston rod end of the extension cylinder; and a first U-shaped clamping plate is fixed to both clamping toes of the clamping cloth belt cylinder.

[0015] Furthermore, the sewing jig assembly includes a jig bottom plate and a pressing module; the pressing module includes a first jig connecting plate and a second jig connecting plate; the second jig connecting plate is sequentially fixed with a first fabric pressing plate, a second fabric pressing plate, a third fabric pressing plate and a fourth fabric pressing plate; the horizontal height of the bottom surface of the first fabric pressing plate is equal to the horizontal height of the bottom surface of the second fabric pressing plate; the horizontal height of the bottom surface of the third fabric pressing plate is equal to the horizontal height of the bottom surface of the fourth fabric pressing plate; the horizontal height of the bottom surface of the first fabric pressing plate is lower than the horizontal height of the bottom surface of the third fabric pressing plate;

[0016] A jig clamping cylinder is fixed on the first jig connecting plate; a return U-shaped frame and a return plate are respectively fixed on the two clamping toes of the jig clamping cylinder; the return plate extends into the interior of the return U-shaped frame; a rear baffle and a front baffle are respectively provided at both ends of the return U-shaped frame; a first baffle support plate is provided on the inner surface of the rear baffle; and a second baffle support plate is provided on the return plate at a position opposite to the first baffle support plate.

[0017] Furthermore, an anti-skid pressure plate is fixed on the fourth fabric pressure plate; a plurality of teeth are arranged on the surfaces of the first fabric pressure plate, the second fabric pressure plate, the third fabric pressure plate, the fourth fabric pressure plate and the anti-skid pressure plate; the teeth on the anti-skid pressure plate are first teeth; the teeth on the first fabric pressure plate are second teeth; the arrangement direction of the first teeth and the arrangement direction of the second teeth are arranged perpendicular to each other.

[0018] After adopting the above structure, the beneficial effects of the present invention are as follows: the frame is provided with an unwinding mechanism, a cutting mechanism, a tape folding mechanism, a fabric positioning mechanism and a sewing machine body in sequence along the length direction; a sewing jig assembly is connected to the sewing machine body; a transfer robot and a fabric storage rack are provided on the frame; a fabric conveying mechanism for placing a piece of fabric on the fabric storage rack into the fabric positioning mechanism is provided on the frame; the transfer robot conveys the tape on the tape folding mechanism to the fabric positioning mechanism; the transfer robot conveys the tape and the fabric positioned on the fabric positioning mechanism to the sewing jig assembly together. When using the present invention, in the first step, the unwinding mechanism unwinds the rolled cloth tape so that the end of the cloth tape reaches the cloth tape folding mechanism; in the second step, the cloth tape folding mechanism folds the end of the cloth tape, and then the cutting mechanism cuts off the end of the cloth tape away from the folding; in the third step, the transfer robot conveys the cloth tape on the cloth tape folding mechanism to the fabric positioning mechanism; in the fourth step, the fabric conveying mechanism takes out a piece of fabric from the fabric storage rack and puts it into the fabric positioning mechanism with the cloth tape; the fabric and the cloth tape are positioned by the material positioning mechanism; in the fifth step, the transfer robot conveys the fabric and the cloth tape positioned by the fabric positioning mechanism to the sewing jig assembly together; after the fabric and the cloth tape are clamped and fixed by the sewing jig assembly, the sewing machine body sews the fabric and the cloth tape together. In the drawstring sewing machine structure, automatic feeding, positioning and sewing of the cloth tape and the fabric can be realized, thereby improving the efficiency of drawstring sewing and forming and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereogram of the present invention;

[0020] Figure 2 It is a structural diagram of the present invention after the frame is removed;

[0021] Figure 3 It is a structural diagram of the cloth belt folding mechanism;

[0022] Figure 4 is a structural diagram of the transfer robot;

[0023] Figure 5 It is a structural diagram of the fabric conveying mechanism;

[0024] Figure 6 It is a structural diagram of the fabric positioning mechanism;

[0025] Figure 7 It is a structural diagram of the cloth belt straightening mechanism;

[0026] Figure 8 It is a structural diagram of the sewing jig assembly;

[0027] Fig. 9 It is a structural diagram of the connection between the fixture clamping cylinder, the correction U-shaped frame and the correction plate;

[0028] Fig.10 It is a structural diagram of the connection between the normalized U-shaped frame and the normalized plate;

[0029] Fig.11 It is the structural diagram of the normalized U-shaped frame;

[0030] Fig.12 It is a structural diagram of the reformed board;

[0031] Fig.13 is a first perspective stereogram of a second fixture connecting plate;

[0032] Fig.14 is a front view of the second fixture connecting plate;

[0033] Description of reference numerals:

[0034] A. Unwinding mechanism; B. Cutting mechanism; C. Fabric conveying mechanism; C1. Fabric translation linear module;

[0035] C2, fabric lifting linear module; C3, suction nozzle; D, sewing machine body; E, sewing jig assembly;

[0036] E1, fixture claw cylinder; E2, first fixture connecting plate; E3, fixture bottom plate;

[0037] E4, second fixture connecting plate; E401, first fabric pressing plate; E402, second fabric pressing plate;

[0038] E403, third fabric pressing plate; E404, fourth fabric pressing plate; E405, anti-skid pressing plate;

[0039] E5, U-shaped frame; E501, rear baffle; E501a, rear baffle support plate; E502, front baffle;

[0040] E6, return plate; E601, front baffle support plate; F, transfer manipulator; F1, transfer gripper cylinder;

[0041] F2, transfer splint; F3, transfer longitudinal linear module; F4, transfer lifting linear module;

[0042] F5, transfer and lateral linear module; G, fabric positioning mechanism; G1, positioning and lifting cylinder;

[0043] G2, positioning lifting plate; G3, positioning claw cylinder; G4, first positioning template; G401, through hole;

[0044] G5, the second positioning template; G6, the extending cylinder; G7, the clamping cylinder;

[0045] G8, first U-shaped clamp; H, cloth belt correcting mechanism; H1, correcting lifting cylinder;

[0046] H2, return jaw cylinder; H3, second U-shaped clamping plate; I, frame; J, cloth belt folding mechanism;

[0047] J1, the third U-shaped clamping plate; J2, the cloth clamping belt clamping claw cylinder; J3, the sliding seat; J4, the sliding block;

[0048] J5, translation cylinder; J6, motor; J7, driving pulley; J8, belt;

[0049] J9, driven pulley; J10, guide rail; K, fabric storage rack; 1, fabric belt; 2, fabric. DETAILED DESCRIPTION

[0050] The present invention will be further described below in conjunction with the accompanying drawings.

[0051] like Figures 1 to 14 As shown, a drawstring sewing machine for an airbag according to the present invention comprises a frame I; the frame I is provided with an unwinding mechanism A, a cutting mechanism B, a cloth tape folding mechanism J, a fabric positioning mechanism G and a sewing machine body D in sequence along the length direction; the sewing machine body D is connected with a sewing jig assembly E; the frame I is provided with a transfer manipulator F and a fabric storage rack K; the frame I is provided with a fabric conveying mechanism C for placing a piece of fabric 2 on the fabric storage rack K into the fabric positioning mechanism G; the transfer manipulator F conveys the cloth tape 1 on the cloth tape folding mechanism J to the fabric positioning mechanism G; the transfer manipulator F conveys the cloth tape 1 and the fabric 2 positioned on the fabric positioning mechanism G to the sewing jig assembly E together;

[0052] The unwinding mechanism A, the cutting mechanism B, the sewing machine body D and the fabric storage rack K are essentially the same as those of the prior art, so they are not described in detail.

[0053] In the first step, the unwinding mechanism A unwinds the rolled fabric tape 1 so that the end of the rolled fabric tape 1 reaches the fabric tape folding mechanism J;

[0054] In the second step, the tape folding mechanism J folds the end of the tape 1, and then the cutting mechanism B cuts off the end of the tape 1 away from the folding;

[0055] In the third step, the transfer robot F transports the fabric 1 on the fabric folding mechanism J to the fabric positioning mechanism G;

[0056] In the fourth step, the fabric conveying mechanism C takes out a piece of fabric 2 from the fabric storage rack K and puts it into the fabric positioning mechanism G with the fabric tape 1; the fabric 2 and the fabric tape 1 are positioned by the material positioning mechanism G;

[0057] In the fifth step, the transfer robot F transports the fabric 2 and the cloth tape 1 positioned by the fabric positioning mechanism G to the sewing jig assembly E; after the fabric 2 and the cloth tape 1 are clamped and fixed by the sewing jig assembly E, the sewing machine body D sews the fabric 2 and the cloth tape 1 together; in the structure of the drawstring sewing machine, the cloth tape 1 and the fabric 2 can be automatically loaded, positioned and sewn, thereby improving the efficiency of the drawstring sewing and reducing the labor intensity.

[0058] As a preferred embodiment of the present invention, the cloth belt folding mechanism J includes a cloth belt clamping claw cylinder J2, a sliding seat J3 and a motor J6; a driven pulley J9 is rotatably connected to the sliding seat J3; a connecting shaft is fixed to the driven pulley J9; the cloth belt clamping claw cylinder J2 is fixed to the connecting shaft; one end of the motor J6 is fixed to the sliding seat J3; a driving pulley J7 is fixed to the other end of the motor J6; a belt J8 is tensioned between the driving pulley J7 and the driven pulley J9; a third U-shaped clamping plate J1 is fixed to both clamping toes of the cloth belt clamping claw cylinder J2;

[0059] The unwinding mechanism A spits out the fabric tape 1, and the end of the fabric tape 1 enters between the two third U-shaped clamping plates J1; the fabric tape clamping claw cylinder J2 drives the third U-shaped clamping plates J1 to approach each other to clamp one end of the fabric tape 1; then the motor J6 is started, and the fabric tape clamping claw cylinder J2 is driven to rotate 180 degrees through the active pulley J7, the belt J8, the driven pulley J9 and the connecting shaft; while the fabric tape 1 rotates, the fabric tape 1 is pulled out to a certain length, so that the fabric tape 1 is flipped backwards and folded on the fabric tape 1 by the clamping part of the third U-shaped clamping plate J1; the third U-shaped clamping plate J1 for clamping the fabric tape 1 uses a U-shaped structure, which enables other clamping claws to extend into the inner cavity of the third U-shaped clamping plate J1 to clamp or align the folded fabric tape 1.

[0060] As a preferred embodiment of the present invention, a guide rail J10 is fixed on the frame I; a slider J4 slidably connected to the guide rail J10 is fixed at the bottom of the sliding seat J3; a translation cylinder J5 is connected between the sliding seat J3 and the frame I; the translation cylinder J5 can drive the sliding seat J3 to slide along the length direction of the guide rail J10 to adjust the position of the third U-shaped splint J1, so that when the cloth tape 1 is connected, the third U-shaped splint J1 is aligned with the cloth tape 1, and when the transfer robot F pulls out the cloth tape 1, the third U-shaped splint J1 will not interfere with the transfer robot F, thereby improving the efficiency of pulling out the cloth tape 1.

[0061] As a preferred embodiment of the present invention, the fabric conveying mechanism C includes a fabric translation linear module C1, a fabric lifting linear module C2 and a suction nozzle C3; one end of the fabric translation linear module C1 is fixed on the frame I; the other end of the fabric translation linear module C1 is fixed on one end of the fabric lifting linear module C2; ​​the suction nozzle C3 is fixed on the other end of the fabric lifting linear module C2; ​​the fabric translation linear module C1 and the fabric lifting linear module C2 are both linear modules and have no essential difference from the prior art, so they are not described in detail; the fabric translation linear module C1 drives the fabric lifting linear module C2 to move, so that the fabric lifting linear module C2 moves between the fabric storage rack K and the fabric positioning mechanism G; the fabric lifting linear module C2 is used to drive the suction nozzle C3 to perform lifting movement; the suction nozzle C3 is used to absorb a piece of fabric 2 on the fabric storage rack K and put it into the fabric positioning mechanism G.

[0062] As a preferred embodiment of the present invention, the transfer manipulator F includes a transfer longitudinal linear module F3, a transfer lifting linear module F4 and a transfer transverse linear module F5; one end of the transfer transverse linear module F5 is fixed on the frame I; the other end of the transfer transverse linear module F5 is fixed on one end of the transfer lifting linear module F4; the other end of the transfer lifting linear module F4 is fixed on one end of the transfer longitudinal linear module F3; the other end of the transfer longitudinal linear module F3 is fixed with a transfer clamping cylinder F1; the two clamping toes of the transfer clamping cylinder F1 are fixed with transfer clamping plates F2;

[0063] The transfer longitudinal linear module F3, the transfer lifting linear module F4 and the transfer transverse linear module F5 are all linear modules, which have no essential difference from the existing technology, so they are not described in detail; the transfer transverse linear module F5 drives the transfer lifting linear module F4 to do transverse movement, and the transfer lifting linear module F4 drives the transfer longitudinal linear module F3 to do lifting movement; the transfer longitudinal linear module F3 drives the transfer clamp cylinder F1 to do longitudinal movement; the transfer clamp cylinder F1 is used to drive the transfer clamp plate F2 to move; the position of the transfer clamp cylinder F1 is adjusted by the coordinated movement of the transfer longitudinal linear module F3, the transfer lifting linear module F4 and the transfer transverse linear module F5, and the transfer clamp cylinder F1 drives the transfer clamp plate F2 to move, so as to clamp and fix the product and transport it to the specified set position.

[0064] As a preferred embodiment of the present invention, the number of the transfer jaw cylinders F1 is two; the transfer jaw cylinders F1 are arranged along the length direction of the transfer transverse linear module F5;

[0065] The transfer clamping plate F2 on the first transfer clamping claw cylinder F1 is the first transfer clamping plate; the transfer clamping plate F2 on the second transfer clamping claw cylinder F1 is the second transfer clamping plate; the gap between the second transfer clamping plate and the first transfer clamping plate is the first gap;

[0066] A cloth belt correcting mechanism H is fixed on the frame I; the cloth belt correcting mechanism H includes a correcting lifting cylinder H1 and a correcting clamping cylinder H2; the two ends of the correcting lifting cylinder H1 are respectively connected to the frame I and the correcting clamping cylinder H2; a second U-shaped clamping plate H3 is fixed on the two clamping toes of the correcting clamping cylinder H2; the width of the second U-shaped clamping plate H3 is smaller than the first gap;

[0067] The width of the second U-shaped clamping plate H3 is smaller than the first gap, ensuring that the second U-shaped clamping plate H3 can extend between the first transfer clamping plate and the second transfer clamping plate;

[0068] After the fabric folding mechanism J folds the front end of the fabric 1, the transfer clamps F2 of the two transfer clamping claw cylinders F1 clamp and fix the two ends of the folded fabric 1 respectively;

[0069] The correcting lifting cylinder H1 drives the correcting clamping claw cylinder H2 to move downward, so that the two second U-shaped clamping plates H3 are inserted into the first gap from top to bottom; and the two second U-shaped clamping plates H3 are respectively placed on both sides of the folded position of the cloth tape 1, and the correcting clamping claw cylinder H2 drives the two second U-shaped clamping plates H3 to approach each other, and the second U-shaped clamping plates H3 are used as the left and right reference planes of the two layers of cloth tape 1, so that the folded two layers of cloth tape 1 are aligned; when the cloth tape 1 is corrected, the clamping force of the transfer clamping plate F2 on the cloth tape 1 is controlled by the two transfer clamping claw cylinders F1, so that the cloth tape 1.

[0070] As a preferred embodiment of the present invention, the fabric positioning mechanism G comprises a positioning lifting cylinder G1 having one end fixed on the frame I, a positioning lifting plate G2 fixed on the other end of the positioning lifting cylinder G1, and a positioning clamping claw cylinder G3 fixed on the positioning lifting plate G2; the first positioning template G4 and the second positioning template G5 are respectively arranged on the two clamping toes of the positioning clamping claw cylinder G3; the front surface of the first positioning template G4 is provided with a through hole G401;

[0071] The positioning template is a plate structure with a shape inside; the first positioning template G4 and the second positioning template G5 form holes paired with the fabric 2 when clamped. After the first positioning template G4 and the second positioning template G5 are driven to clamp by the positioning claw cylinder G3, the holes formed by the first positioning template G4 and the second positioning template G5 are paired with the fabric 2. The fabric 2 is positioned and aligned with the cloth tape 1 through the side surfaces of the first positioning template G4 and the second positioning template G5. The fabric 2 is positioned externally to improve the positioning accuracy between the cloth tape 1 and the fabric 2.

[0072] As a preferred embodiment of the present invention, an extending cylinder G6 is fixed on the positioning lifting plate G2; a clamping tape cylinder G7 is fixed on the piston rod end of the extending cylinder G6; a first U-shaped clamping plate G8 is fixed on both clamping toes of the clamping tape cylinder G7; the extending cylinder G6 drives the clamping tape cylinder G7 to move, and the clamping tape cylinder G7 drives the two first U-shaped clamping plates G8 to clamp and fix the folded tape 1; then the first U-shaped clamping plate G8 on the upper side of the tape 1 supports one end of the fabric 2, and the other end of the fabric 2 is placed into the first positioning The template G4 and the second positioning template G5 are positioned; the positioning between the cloth tape 1 and the fabric 2 is completed; then the clamping part of the transfer robot F is located at a position directly opposite to the inner hole of the first U-shaped clamp G8, and the folded part of the cloth tape 1 and the end of the fabric 2 extending out of the first positioning template G4 and the second positioning template G5 are clamped and fixed together; the clamping part of the transfer robot F is inserted into the position directly opposite to the through hole G401, and the fabric 2 is clamped and fixed at the positions of the first positioning template G4 and the second positioning template G5, so that the fabric 2 and the cloth tape 1 are completely positioned and aligned.

[0073] As a preferred embodiment of the present invention, the sewing jig assembly E includes a jig bottom plate E3 and a pressing module; the pressing module includes a first jig connecting plate E2 and a second jig connecting plate E4; the second jig connecting plate E4 is sequentially fixed with a first fabric pressing plate E401, a second fabric pressing plate E402, a third fabric pressing plate E403 and a fourth fabric pressing plate E404; the horizontal height of the bottom surface of the first fabric pressing plate E401 is equal to the horizontal height of the bottom surface of the second fabric pressing plate E402; the horizontal height of the bottom surface of the third fabric pressing plate E403 is equal to the horizontal height of the bottom surface of the fourth fabric pressing plate E404; the horizontal height of the bottom surface of the first fabric pressing plate E401 is lower than the horizontal height of the bottom surface of the third fabric pressing plate E403;

[0074] A jig clamping cylinder E1 is fixed on the first jig connecting plate E2; a return U-shaped frame E5 and a return plate E6 are respectively fixed on the two clamping toes of the jig clamping cylinder E1; the return plate E6 extends into the interior of the return U-shaped frame E5; a rear stop bar E501 and a front stop bar E502 are respectively provided at both ends of the return U-shaped frame E5; a first stop support plate E501a is provided on the inner surface of the rear stop bar E501; the return plate E6 is provided with a second stop support plate E601 at a position opposite to the first stop support plate E501a;

[0075] The correction U-shaped frame E5 is a U-shaped frame structure, and the correction plate E6 is a plate structure, which is essentially the same as the prior art and is therefore not described in detail. The correction U-shaped frame E5 is a U-shaped frame structure, which enables the transfer robot F to extend into the interior of the correction U-shaped frame E5. The first jig connecting plate E2 and the second jig connecting plate E4 are both connected to the lifting mechanism. The lifting mechanism and the jig bottom plate E3 are both fixed on the frame I. Before the transfer robot F feeds in the cloth tape 1 and the fabric 2, the lifting mechanism lifts the first jig connecting plate E2 and the second jig connecting plate E4 to a certain height. After the cloth tape 1 and the fabric 2 are placed on the jig bottom plate E3, the lifting mechanism drives the first jig connecting plate E2 and the second jig connecting plate E4 to descend. Place one end of the fabric 2 on the correction U-shaped frame E5. Between the front plate E6 and the front baffle E502, the other end of the fabric 2 is placed between the rear baffle E501 and the return plate E6; the two toes of the clamping claw cylinder E1 move to drive the return U-shaped frame E5 and the return plate E6 to approach each other, and the front end of the fabric 2 is returned and positioned between the return plate E6 and the front baffle E502; the rear baffle E501 and the return plate E6 return and position the rear end of the fabric 2, and at the same time, the side surface of the first baffle support plate E501a and the side surface of the second baffle support plate E601 clamp and align the folded part of the fabric tape 1; the top surface of the first baffle support plate E501a and the top surface of the second baffle support plate E601 support the fabric 2; so that the fabric 2 and the fabric tape 1 are positioned in the return U-shaped frame E5 and the return plate E6;

[0076] The first fabric pressing plate E401 and the second fabric pressing plate E402 press the fabric 2 directly onto the jig bottom plate E3; the third fabric pressing plate E403 and the fourth fabric pressing plate E404 press the upper surface of the fabric 2 together with the fabric tape 1 onto the jig bottom plate E3;

[0077] The height difference between the first fabric pressing plate E401 and the third fabric pressing plate E403 is equal to twice the thickness of the cloth tape 1 , so that when the first jig connecting plate E2 and the second jig connecting plate E4 are lowered to the same height, both ends of the fabric 2 are pressed synchronously.

[0078] As a preferred embodiment of the present invention, an anti-skid pressure plate E405 is fixed on the fourth fabric pressure plate E404; a plurality of teeth are arranged on the surfaces of the first fabric pressure plate E401, the second fabric pressure plate E402, the third fabric pressure plate E403, the fourth fabric pressure plate E404 and the anti-skid pressure plate E405; the teeth on the anti-skid pressure plate E405 are first teeth; the teeth on the first fabric pressure plate E401 are second teeth; the arrangement direction of the first teeth and the arrangement direction of the second teeth are arranged perpendicular to each other;

[0079] The first teeth and the second teeth which are arranged perpendicular to each other are pressed against the surface of the fabric 2, so that the fabric 2 has an anti-slip effect in two directions.

[0080] Beneficial effects of the present invention:

[0081] 1. The structure of the drawstring sewing machine can realize automatic feeding, positioning and sewing of cloth tapes and fabrics, improve the efficiency of drawstring sewing and reduce labor intensity;

[0082] 2. The clamping parts for clamping the tape and fabric are both U-shaped plate structures, which can facilitate the insertion of the clamping claws, so that the tape and fabric are clamped and fixed during the transfer from one conveying mechanism to another, so that the transfer of the tape and fabric is seamless, and the accuracy before and after the transfer of the tape and fabric is improved;

[0083] 3. The cloth belt is clamped and fixed, and then rotated 180 degrees to complete the folding, which simplifies the structure of the cloth belt folding;

[0084] 4. A stepped surface is formed by the height difference between the first fabric pressing plate and the third fabric pressing plate, so that the fabric and the material belt are pressed synchronously, thereby improving the positioning accuracy of the drawstring; the teeth in different arrangement directions are pressed on the fabric to prevent the fabric from sliding during sewing, thereby improving the sewing accuracy.

[0085] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A drawstring sewing machine for an airbag, characterized in that: The invention comprises a frame (I); the frame (I) is provided with an unwinding mechanism (A), a cutting mechanism (B), a cloth tape folding mechanism (J), a fabric positioning mechanism (G) and a sewing machine body (D) in sequence along the length direction; the sewing machine body (D) is connected with a sewing jig assembly (E); the frame (I) is provided with a transfer robot (F) and a fabric storage rack (K); the frame (I) is provided with a fabric conveying mechanism (C) for placing a piece of fabric (2) on the fabric storage rack (K) into the fabric positioning mechanism (G); the transfer robot (F) conveys the cloth tape (1) on the cloth tape folding mechanism (J) to the fabric positioning mechanism (G); the transfer robot (F) conveys the cloth tape (1) and the fabric (2) positioned on the fabric positioning mechanism (G) to the sewing jig assembly (E) together. The sewing jig assembly (E) comprises a jig bottom plate (E3) and a pressing module; the pressing module comprises a first jig connecting plate (E2) and a second jig connecting plate (E4); the second jig connecting plate (E4) is sequentially fixed with a first fabric pressing plate (E401), a second fabric pressing plate (E402), a third fabric pressing plate (E403) and a fourth fabric pressing plate (E404); the horizontal height of the bottom surface of the first fabric pressing plate (E401) is equal to the horizontal height of the bottom surface of the second fabric pressing plate (E402); the horizontal height of the bottom surface of the third fabric pressing plate (E403) is equal to the horizontal height of the bottom surface of the fourth fabric pressing plate (E404); the horizontal height of the bottom surface of the first fabric pressing plate (E401) is lower than the horizontal height of the bottom surface of the third fabric pressing plate (E403); A jig clamping cylinder (E1) is fixed on the first jig connecting plate (E2); a return U-shaped frame (E5) and a return plate (E6) are respectively fixed on the two clamping toes of the jig clamping cylinder (E1); the return plate (E6) extends into the interior of the return U-shaped frame (E5); a rear baffle (E501) and a front baffle (E502) are respectively provided at both ends of the return U-shaped frame (E5); a first baffle support plate (E501a) is provided on the inner surface of the rear baffle (E501); and a second baffle support plate (E601) is provided on the return plate (E6) at a position opposite to the first baffle support plate (E501a).

2. The drawstring sewing machine for an airbag according to claim 1, characterized in that: The cloth belt folding mechanism (J) comprises a cloth belt clamping claw cylinder (J2), a sliding seat (J3) and a motor (J6); a driven pulley (J9) is rotatably connected to the sliding seat (J3); a connecting shaft is fixed to the driven pulley (J9); the cloth belt clamping claw cylinder (J2) is fixed to the connecting shaft; one end of the motor (J6) is fixed to the sliding seat (J3); a driving pulley (J7) is fixed to the other end of the motor (J6); a belt (J8) is tensioned between the driving pulley (J7) and the driven pulley (J9); and a third U-shaped clamping plate (J1) is fixed to both clamping toes of the cloth belt clamping claw cylinder (J2).

3. The drawstring sewing machine for an airbag according to claim 2, characterized in that: A guide rail (J10) is fixed on the frame (I); a sliding block (J4) slidably connected to the guide rail (J10) is fixed at the bottom of the sliding seat (J3); and a translation cylinder (J5) is connected between the sliding seat (J3) and the frame (I).

4. The drawstring sewing machine for an airbag according to claim 1, characterized in that: The fabric conveying mechanism (C) comprises a fabric translation linear module (C1), a fabric lifting linear module (C2) and a suction nozzle (C3); one end of the fabric translation linear module (C1) is fixed on the frame (I); the other end of the fabric translation linear module (C1) is fixed on one end of the fabric lifting linear module (C2); and the suction nozzle (C3) is fixed on the other end of the fabric lifting linear module (C2).

5. The drawstring sewing machine for an airbag according to claim 1, characterized in that: The transfer robot (F) comprises a transfer longitudinal linear module (F3), a transfer lifting linear module (F4) and a transfer transverse linear module (F5); one end of the transfer transverse linear module (F5) is fixed on the frame (I); the other end of the transfer transverse linear module (F5) is fixed on one end of the transfer lifting linear module (F4); the other end of the transfer lifting linear module (F4) is fixed on one end of the transfer longitudinal linear module (F3); a transfer clamping cylinder (F1) is fixed on the other end of the transfer longitudinal linear module (F3); and transfer clamping plates (F2) are fixed on both clamping toes of the transfer clamping cylinder (F1).

6. The drawstring sewing machine for an airbag according to claim 5, characterized in that: The number of the transfer clamping cylinders (F1) is two; the transfer clamping cylinders (F1) are arranged along the length direction of the transfer transverse linear module (F5); The transfer clamping plate (F2) on the first transfer clamping claw cylinder (F1) is the first transfer clamping plate; the transfer clamping plate (F2) on the second transfer clamping claw cylinder (F1) is the second transfer clamping plate; the gap between the second transfer clamping plate and the first transfer clamping plate is the first gap; A cloth belt correcting mechanism (H) is fixed on the frame (I); the cloth belt correcting mechanism (H) comprises a correcting lifting cylinder (H1) and a correcting clamping claw cylinder (H2); two ends of the correcting lifting cylinder (H1) are respectively connected to the frame (I) and the correcting clamping claw cylinder (H2); a second U-shaped clamping plate (H3) is fixed on two clamping toes of the correcting clamping claw cylinder (H2); the width of the second U-shaped clamping plate (H3) is smaller than the first gap.

7. The drawstring sewing machine for an airbag according to claim 1, characterized in that: The fabric positioning mechanism (G) comprises a positioning lifting cylinder (G1) having one end fixed on a frame (I), a positioning lifting plate (G2) fixed on the other end of the positioning lifting cylinder (G1), and a positioning clamping claw cylinder (G3) fixed on the positioning lifting plate (G2); a first positioning template (G4) and a second positioning template (G5) are respectively arranged on two clamping toes of the positioning clamping claw cylinder (G3); and a through hole (G401) is arranged on the front surface of the first positioning template (G4).

8. The drawstring sewing machine for an airbag according to claim 7, characterized in that: An extension cylinder (G6) is fixed on the positioning lifting plate (G2); a cloth belt clamping cylinder (G7) is fixed on the piston rod end of the extension cylinder (G6); and a first U-shaped clamping plate (G8) is fixed on both clamping toes of the cloth belt clamping cylinder (G7).

9. The drawstring sewing machine for an airbag according to claim 1, characterized in that: An anti-skid pressure plate (E405) is fixed on the fourth fabric pressure plate (E404); a plurality of teeth are arranged on the surfaces of the first fabric pressure plate (E401), the second fabric pressure plate (E402), the third fabric pressure plate (E403), the fourth fabric pressure plate (E404) and the anti-skid pressure plate (E405); the teeth on the anti-skid pressure plate (E405) are first teeth; the teeth on the first fabric pressure plate (E401) are second teeth; and the arrangement direction of the first teeth and the arrangement direction of the second teeth are arranged perpendicular to each other.

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