External sewing device for sofa production

Abstract

The present invention discloses an external sewing device for sofa production, which specifically relates to the technical field of sofa production, including a device base, cloth and a rectangular frame plate, wherein the four corners of the lower end of the device base are fixedly connected with support legs, a control box is fixedly installed at the middle of the front end of the device base, a sewing component is fixedly installed at the left end of the device base, a feeding component is provided in the inner cavity of the rectangular frame plate, and a moving component is provided at the lower part of the inner surface of the device base. The external sewing device for sofa production described in the present invention is provided with a feeding component and a moving component, so that the cloth can be gradually fixed in the process of moving feeding, and the tension of the cloth can be adaptively adjusted at the same time, thereby effectively improving the wrinkles of the cloth during the sewing process, thereby effectively improving the accuracy of sewing, avoiding deviations, and thereby effectively avoiding waste of cloth.

Description

Technical Field

[0001] The invention relates to the technical field of sofa production, in particular to an external sewing device for sofa production. Background Art

[0002] Sofa sewing is a delicate craft, using professional sewing technology to ensure that the sofa lines are smooth and the fabric surface is flat, improving the overall comfort and aesthetics;

[0003] Sofa production covers processes such as frame making, fabric cutting, fine sewing, thread pressing and reinforcement, and strict quality inspection to ensure comfort, durability and excellent quality.

[0004] Chinese patent document CN217351766U discloses an external sewing device for sofa production. The external sewing device for sofa production aims to solve the technical problem that the existing technology cannot be adjusted according to the size of the sofa and is inconvenient to use. The external sewing device for sofa production includes a base; the bottom end of the base is provided with a universal wheel, and the upper end of the base is provided with a lifting assembly. The external sewing device for sofa production only needs to drive the workbench to a suitable position through the lifting assembly to adjust the height, drive the baffle to move left and right through the adjustment assembly, limit the sofa through the baffle, and sew through the sewing machine head, thereby achieving adjustable processing; however, the above patent document still has the following defects during implementation:

[0005] Although the above patent can be adjusted in height during implementation, it is unable to fix the pre-sewn fabric and adaptively adjust the tension, which makes it easy for the sewing position of the sofa fabric to deviate during the sewing process, thereby affecting the sewing operation and causing fabric waste. Summary of the invention

[0006] The main purpose of the present invention is to provide an external sewing device for sofa production, which can effectively solve the problem that sofa fabrics cannot be effectively fixed and tension self-adapted.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an external sewing device for sofa production, including a device base, cloth and a rectangular frame plate, support legs are fixedly connected to the four corners of the lower end of the device base, a control box is fixedly installed in the middle of the front end of the device base, a sewing component is fixedly installed at the left end of the device base, a loading component is arranged in the inner cavity of the rectangular frame plate, and a moving component is arranged at the lower part of the inner surface of the device base.

[0008] Preferably, the feeding assembly includes two rotating holes opened at the left end of the rectangular frame plate and extending to the right end of the rectangular frame plate, a driving mechanism is arranged in the inner cavity of the rectangular frame plate, a tension mechanism is symmetrically arranged at the upper end of the driving mechanism, a fixing mechanism is arranged at one end of the four tension mechanisms close to each other, and a guide mechanism is symmetrically arranged at the upper end of the rectangular frame plate.

[0009] Preferably, the driving mechanism comprises two rotating rods 1 rotatably connected to the inner surface of the rotating hole, the outer surfaces of the two rotating rods 1 are fixedly connected to rollers, and the outer surfaces of the two rollers are wrapped with hard conveyor belts.

[0010] Preferably, the tension mechanism includes a connecting block 1 fixedly connected to the upper end of the hard conveyor belt, the left end of the connecting block 1 passes through and extends to the right end of the connecting block 1 and is slidably connected to a rectangular rod, the right part of the upper end of the rectangular rod is fixedly connected to a round rod, the outer surface of the round rod is rotatably connected to a round block 1, the upper end of the round rod is fixedly connected to a connecting block 2, the left end of the rectangular rod is fixedly connected to a round block 2, the outer surface of the rectangular rod is sleeved with a spring 1, the two ends of the spring 1 are respectively fixedly connected to the right end of the round block 2 and the left end of the connecting block 1, the inner surface of the connecting block 2 is slidably connected to two telescopic rods 1, the right ends of the two telescopic rods 1 are commonly fixedly connected to an L-shaped plate fixedly connected to the upper right end of the connecting block 2, the outer surfaces of the two telescopic rods 1 are both sleeved with springs 2, the upper end of the rectangular frame plate is symmetrically provided with guide rail holes, the outer surface of the round block 1 is slidably connected to the inner surface of the guide rail hole.

[0011] Preferably, the fixing mechanism comprises an L-shaped block fixedly connected to the left ends of the two telescopic rods, the upper front end of the L-shaped block passes through the rear end of the L-shaped block and is rotatably connected to a rotating rod 2, the outer surface of the rotating rod 2 is fixedly connected to a fixing block, a circular groove is provided on the upper middle part of the right end of the fixing block, the left part of the inner surface of the circular groove is fixedly connected to the telescopic rod 2, the right end of the telescopic rod 2 is fixedly connected to a ball, a spring 3 is sleeved on the outer surface of the telescopic rod 2, two ends of the spring 3 are respectively fixedly connected to the left part of the inner surface of the circular groove and the left part of the outer surface of the ball, and the two ends of the two springs are respectively fixedly connected to the left end of the connecting block 2 and the right end of the L-shaped block.

[0012] Preferably, the guiding mechanism comprises three connecting blocks which are symmetrically fixedly connected to the upper end of the rectangular frame plate front and back, and one end of two connecting blocks three close to each other is fixedly connected with an arc plate, and a guide groove is provided at the left end of the arc plate, and the height of the inner surface of the guide groove gradually increases from front to back, and the outer surface of the sphere is slidably connected to the inner surface of the guide groove.

[0013] Preferably, the moving component includes a servo motor fixedly connected to the front left end of the rectangular frame plate, a transmission mechanism is provided at the right end of the servo motor, a moving mechanism is provided at the lower end of the rectangular frame plate, and a limiting mechanism is provided at the lower inner surface of the device base.

[0014] Preferably, the transmission mechanism includes a circular sleeve 1 fixedly connected to the left end of a rotating rod 1 located at the front, the output end of the servo motor is fixedly connected to a threaded rod via a coupling, the left end of the circular sleeve 1 is rotatably connected to a circular sleeve 2, the outer surface of the threaded rod is threadedly connected to a circular block 3, the outer surface of the threaded rod is symmetrically provided with sliding grooves, the inner surfaces of the two sliding grooves are both slidably connected to rectangular blocks slidably connected to the inner surface of the circular block 3, the inner surfaces of the circular sleeve 1 and the circular sleeve 2 are symmetrically provided with rectangular grooves slidably connected to the rectangular blocks, the left end of the circular block 3 is symmetrically fixedly connected to a telescopic rod 3 fixedly connected to the right end of the servo motor front and back, the outer surface of the circular sleeve 2 is wrapped with a belt, and the inner surface of the belt is wrapped with a roller.

[0015] Preferably, the moving mechanism includes four connecting blocks fixedly connected to the four corners of the lower end of the rectangular frame plate, the inner surfaces of the four connecting blocks on the same side are rotatably connected with a rotating rod three, the outer surface of the rotating rod three located at the front is fixedly connected to the right end of the roller, the two outer surfaces of the rotating rods three are symmetrically fixedly connected with gears, the lower part of the inner surface of the device base is provided with concave grooves symmetrically on the left and right, and the inner surfaces of the two concave grooves are fixedly connected with racks meshing with the outer surface of the gear.

[0016] Preferably, the limiting mechanism includes a connecting rod fixedly connected to the middle of the left end and the middle of the right end of the rectangular frame plate, and the lower part of the inner surface of the concave groove is symmetrically provided with limiting grooves, and the inner surfaces of the two limiting grooves are slidably connected with limiting blocks fixedly connected to the lower end of the connecting rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, by providing a feeding component and a moving component, the cloth can be gradually fixed in the process of moving the cloth, and the tension of the cloth can be adaptively adjusted, thereby effectively improving the wrinkles of the cloth during the sewing process, thereby effectively improving the sewing accuracy, avoiding deviations, and effectively avoiding cloth waste.

[0019] 2. In the present invention, by providing a guiding mechanism and a fixing mechanism, the ball can slide on the inner surface of the guide groove, so that the height of the ball will continue to increase, and the fixed block will continue to press down, so that the cloth can be effectively fixed during the tensioning process, thereby preventing the cloth from loosening, improving the accuracy of cloth sewing, and facilitating use by users.

[0020] 3. In the present invention, by providing a transmission mechanism and a moving mechanism, the fixed and stretched cloth can move back and forth under the cooperation of the gear and the rack, and then can cooperate with the sewing component to automatically sew the cloth, effectively avoiding manual pushing of the cloth, reducing labor costs, and improving the work efficiency of cloth sewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the sewing assembly and the moving assembly of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the rotating hole and the guide rail hole of the present invention;

[0024] Figure 4 It is a schematic diagram of the driving mechanism structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the explosion effect of the tension mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the fixing mechanism effect of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the guide mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of a partial cross-sectional structure of the transmission mechanism of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the mobile mechanism of the present invention;

[0030] Fig.10 It is a schematic diagram of the cross-sectional structure of the limiting groove and the concave groove of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the limiting mechanism of the present invention.

[0032] In the figure: 1, device base; 2, support leg; 3, control box; 4, sewing assembly; 5, cloth; 6, feeding assembly; 61, rotating hole; 62, driving mechanism; 621, rotating rod 1; 622, round roller; 623, hard conveyor belt; 63, tension mechanism; 631, connecting block 1; 632, rectangular rod; 633, round rod; 634, round block 1; 635, connecting block 2; 636, spring 1; 637, telescopic rod 1; 638, spring 2; 639, L-shaped plate; 6310, guide rail hole; 6311, round block 2; 64, fixing mechanism; 641, L-shaped block; 642, rotating rod 2; 643, fixing block; 644, round groove; 645, telescopic rod 2; 64 6. Spring three; 647. Ball; 65. Guide mechanism; 651. Connecting block three; 652. Arc plate; 653. Guide groove; 7. Moving assembly; 71. Servo motor; 72. Transmission mechanism; 721. Round sleeve one; 722. Round sleeve two; 723. Threaded rod; 724. Slide; 725. Round block three; 726. Rectangular groove; 727. Rectangular block; 728. Telescopic rod three; 729. Belt; 7210. Roller; 73. Moving mechanism; 731. Connecting block four; 732. Rotating rod three; 733. Concave groove; 734. Rack; 735. Gear; 74. Limit mechanism; 741. Limit groove; 742. Limit block; 743. Connecting rod; 8. Rectangular frame plate. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1, as Figure 1 As shown, an external sewing device for sofa production includes a device base 1, cloth 5 and a rectangular frame plate 8. Support legs 2 are fixedly connected to the four corners of the lower end of the device base 1, a control box 3 is fixedly installed at the middle of the front end of the device base 1, a sewing component 4 is fixedly installed at the left end of the device base 1, a feeding component 6 is arranged in the inner cavity of the rectangular frame plate 8, and a moving component 7 is arranged at the lower part of the inner surface of the device base 1.

[0035] During the implementation of this embodiment, the cloth 5 cut to a suitable size is placed on the upper end of the rectangular frame plate 8, and the control box 3 controls the feeding component 6 to further fix the cloth 5 during the movement and adaptively adjust the tension of the cloth 5. At the same time, the cloth 5 can be sewn in coordination with the sewing component 4 through the movement of the moving component 7.

[0036] The sewing assembly 4 mentioned above is a mature sewing means in the prior art, and is a mature sewing device in the prior art. This solution utilizes its function of sewing the fabric 5 of the sofa, and its structure and principle will not be elaborated again.

[0037] The control box 3 mentioned above is a mature technical control means in the prior art, and is a mature control device in the prior art. This solution utilizes its control function, and its structure and principle will not be elaborated.

[0038] Specifically, in order to realize the fixing and tension adaptive adjustment of the cloth 5, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the fixing mechanism 64 includes an L-shaped block 641 fixedly connected to the left ends of the two telescopic rods 1 637. The upper front end of the L-shaped block 641 penetrates through the rear end of the L-shaped block 641 and is rotatably connected to the rotating rod 2 642. The outer surface of the rotating rod 2 642 is fixedly connected to a fixing block 643. A circular groove 644 is provided on the upper middle part of the right end of the fixing block 643. The left part of the inner surface of the circular groove 644 is fixedly connected to the telescopic rod 2 645. The right end of the telescopic rod 2 645 is fixedly connected to a ball 647. A spring 3 646 is sleeved on the outer surface of the telescopic rod 2 645. The two ends of the spring 3 646 are respectively fixedly connected to the left part of the inner surface of the circular groove 644 and the left part of the outer surface of the ball 647. The two ends of the two springs 2 638 are respectively fixedly connected to the left end of the connecting block 2 635 and the right end of the L-shaped block 641.

[0039] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In this embodiment, the guide mechanism 65 includes a connection block 651 that is symmetrically fixed to the upper end of the rectangular frame plate 8. The ends of the two connection blocks 651 that are close to each other are fixedly connected with an arc plate 652. A guide groove 653 is opened at the left end of the arc plate 652. The height of the inner surface of the guide groove 653 gradually increases from front to back, and the outer surface of the ball 647 is slidably connected to the inner surface of the guide groove 653.

[0040] During the implementation process, the upper part of the outer surface of the fixed block 643 is pressed one by one to rotate the rotating rod 2 642. At this time, the ball 647 will be squeezed by the inner surface of the guide groove 653, so that the telescopic rod 2 645 and the spring 3 646 are compressed, and the four corners of the cloth 5 to be sewn are placed on the upper end of the L-shaped block 641. At this time, the fixed block 643 is released, so that the fixed block 643 will drive the rotating rod 2 642 to rotate under the cooperation of the spring 3 646 and the telescopic rod 2 645, so that the lower end of the fixed block 643 preliminarily fixes the cloth 5.

[0041] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the moving component 7 includes a servo motor 71 fixedly connected to the front left end of the rectangular frame plate 8, a transmission mechanism 72 is provided at the right end of the servo motor 71, a moving mechanism 73 is provided at the lower end of the rectangular frame plate 8, and a limiting mechanism 74 is provided at the lower inner surface of the device base 1.

[0042] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the feeding assembly 6 includes two rotating holes 61 opened at the left end of the rectangular frame plate 8 and extending to the right end of the rectangular frame plate 8. A driving mechanism 62 is arranged in the inner cavity of the rectangular frame plate 8. Tension mechanisms 63 are symmetrically arranged on the upper end of the driving mechanism 62. A fixing mechanism 64 is arranged at one end of the four tension mechanisms 63 close to each other. A guide mechanism 65 is symmetrically arranged on the upper end of the rectangular frame plate 8.

[0043] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the driving mechanism 62 includes two rotating rods 621 rotatably connected to the inner surface of the rotating hole 61, the outer surfaces of the two rotating rods 621 are fixedly connected to rollers 622, and the outer surfaces of the two rollers 622 are wrapped with hard conveyor belts 623.

[0044] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8In this embodiment, the transmission mechanism 72 includes a round sleeve 1 721 fixedly connected to the left end of the front rotating rod 1 621, the output end of the servo motor 71 is fixedly connected to a threaded rod 723 through a coupling, the left end of the round sleeve 1 721 is rotatably connected to the round sleeve 2 722, the outer surface of the threaded rod 723 is threadedly connected to a round block 3 725, the outer surface of the threaded rod 723 is symmetrically provided with sliding grooves 724, the inner surfaces of the two sliding grooves 724 are both slidably connected to rectangular blocks 727 slidably connected to the inner surface of the round block 3 725, the inner surfaces of the round sleeve 1 721 and the round sleeve 2 722 are symmetrically provided with rectangular grooves 726 slidably connected to the rectangular block 727, the left end of the round block 3 725 is symmetrically fixedly connected to the telescopic rod 3 728 fixedly connected to the right end of the servo motor 71, the outer surface of the round sleeve 2 722 is wound with a belt 729, and the inner surface of the belt 729 is wound with a roller 7210.

[0045] During the implementation process, the servo motor 71 is started so that the output end of the servo motor 71 drives the threaded rod 723 to rotate through the coupling. Since the threaded rod 723 is threadedly connected to the outer surface of the round block three 725 and under the limiting action of the telescopic rod three 728, the thread drives the round block three 725 to move to the left during the rotation, so that the rectangular block 727 is driven to move to the left during the movement of the round block three 725, and under the limiting action of the inner surfaces of the rectangular groove 726 and the slide groove 724, the threaded rod 723 drives the rectangular block 727 to rotate during the rotation, and then drives the circular sleeve 721 to rotate, so that the rotation of the circular sleeve 721 drives the rotating rod 621 to rotate, and the rotation of the rotating rod 621 drives the hard conveyor belt 623 to move backward.

[0046] Secondly, when the threaded rod 723 rotates and drives the round block three 725 away from the rectangular groove 726 in the round sleeve one 721, it will rotate in the inner surface space formed by the round sleeve one 721 and the round sleeve two 722. When the round block three 725 moves to the inner surface of the rectangular groove 726 in the round sleeve two 722, it will drive the round sleeve two 722 to rotate under the limiting action of the slide groove 724 and the rectangular groove 726. Since the round sleeve two 722 and the belt 729 are wound together, the belt 729 rotates and drives the roller 7210 to rotate, thereby transmitting the power.

[0047] In addition, when the servo motor 71 drives the threaded rod 723 to rotate in the reverse direction, the second circular sleeve 722 will rotate first, and then drive the first circular sleeve 721 to rotate.

[0048] The above-mentioned middle round block 725 is located at the right part of the outer surface of the threaded rod 723 in the initial state.

[0049] The circular block three 725 mentioned above moves to the inner surface space formed by the circular sleeve one 721 and the circular sleeve two 722, and can still accurately enter the inner surface of the rectangular groove 726 in the circular sleeve two 722 after rotating several times. The number of rotations of the circular block three 725 can be adjusted according to actual needs.

[0050] The servo motor 71 mentioned above is controlled by a servo control system in the prior art in this solution, which can control the speed, number of rotations, and rotation angle of the servo motor 71. In this solution, it is only necessary to make the number of forward and reverse rotations of the servo motor 71 the same, and it can stop in time after the set number of rotations is completed.

[0051] For further information, see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the tension mechanism 63 includes a connecting block 631 fixedly connected to the upper end of the hard conveyor belt 623, the left end of the connecting block 631 penetrates and extends to the right end of the connecting block 631 and is slidably connected to a rectangular rod 632, the right part of the upper end of the rectangular rod 632 is fixedly connected to a round rod 633, the outer surface of the round rod 633 is rotatably connected to a round block 634, the upper end of the round rod 633 is fixedly connected to a connecting block 635, the left end of the rectangular rod 632 is fixedly connected to a round block 6311, and the outer surface of the rectangular rod 632 is sleeved with a spring 63 6. Both ends of spring 1 636 are fixedly connected to the right end of round block 2 6311 and the left end of connecting block 1 631 respectively. Two telescopic rods 1 637 are slidably connected to the inner surface of connecting block 2 635. The right ends of the two telescopic rods 1 637 are commonly fixedly connected to an L-shaped plate 639 fixedly connected to the upper part of the right end of connecting block 2 635. The outer surfaces of the two telescopic rods 1 637 are both sleeved with springs 2 638. The upper end of the rectangular frame plate 8 is symmetrically provided with guide rail holes 6310. The outer surface of round block 1 634 is slidably connected to the inner surface of the guide rail hole 6310.

[0052] During the implementation process, due to the movement of the hard conveyor belt 623, the four connecting blocks 631 are driven to move, and the round block 634 on the round rod 633 is driven to rotate on the inner surface of the guide hole 6310. Under the guidance of the guide hole 6310, the connecting blocks 631 on both sides move away from each other, so that the rectangular rod 632 slides on the inner surface of the connecting block 631 and squeezes the spring 636 in a compressed state, so that the cloth 5 can be straightened, effectively avoiding the cloth 5 from wrinkling during the sewing process. At the same time, the ball 647 will move with the movement of the connecting block 635, so that the ball 647 can slide on the inner surface of the guide groove 653 on the arc plate 652. Since the height of the inner surface of the guide groove 653 gradually increases from front to back, the ball 647 will continuously push the fixed block 643 to move downward, so that the fixed block 643 gradually fixes the cloth 5.

[0053] Secondly, when the connecting blocks 631 on both sides move away from each other, the cloth 5 fixed by the fixing block 643 and the L-shaped block 641 will be continuously straightened. In order to avoid damage to the cloth 5 caused by excessive tension, the cloth 5 has a certain tension after being straightened, which will pull the fixing block 643 and the L-shaped block 641 back, so that the L-shaped block 641 will pull the telescopic rod 1 637 and the spring 2 638 to move, and then the tension of the cloth 5 can be adaptively adjusted, effectively avoiding damage to the cloth 5.

[0054] Embodiment 2: Based on Embodiment 1, this embodiment adds a moving component 7 for moving and sewing the fixed cloth 5, so as to achieve the purpose of sewing the cloth 5 by moving it back and forth.

[0055] Specifically, in order to sew the cloth 5 by moving it back and forth, refer to Figure 2 , Figure 3 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 In this embodiment, the moving mechanism 73 includes four connecting blocks 731 fixedly connected to the four corners of the lower end of the rectangular frame plate 8, and the inner surface of the four connecting blocks 731 on the same side is rotatably connected with a rotating rod 3 732. The outer surface of the rotating rod 3 732 located at the front is fixedly connected to the right end of the roller 7210, and the outer surfaces of the two rotating rods 3 732 are symmetrically fixedly connected with gears 735. The lower part of the inner surface of the device base 1 is symmetrically provided with concave grooves 733, and the inner surfaces of the two concave grooves 733 are fixedly connected with racks 734 meshing with the outer surface of the gear 735.

[0056] During the implementation process, when the threaded rod 723 rotates forward and drives the rectangular block 727 to enter the inner surface of the rectangular groove 726 in the circular sleeve 2 722, the circular sleeve 2 722 rotates at this time, and under the transmission action of the belt 729 and the roller 7210, the rotating rod 3 732 is driven to rotate. Since the gear 735 is fixedly connected to the rotating rod 3 732, the rotating rod 3 732 drives the gear 735 to rotate during the rotation process. Since the gear 735 and the rack 734 are meshingly connected, the rotation of the gear 735 will drive the rectangular frame plate 8 to move, so that the fixed and tensioned cloth 5 moves backward, and then the cloth 5 can be sewn by the sewing component 4 during the movement, thereby improving the work efficiency of the cloth 5 in the sewing process and reducing labor costs.

[0057] For further information, see Figure 2 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 In this embodiment, the limiting mechanism 74 includes a connecting rod 743 fixedly connected to the middle of the left end and the middle of the right end of the rectangular frame plate 8, and a limiting groove 741 is symmetrically provided on the lower part of the inner surface of the concave groove 733. The inner surfaces of the two limiting grooves 741 are slidably connected with a limiting block 742 fixedly connected to the lower end of the connecting rod 743.

[0058] During the implementation process, due to the backward movement of the rectangular frame plate 8, the rectangular frame plate 8 will drive the connecting rod 743 to move, and then the limiting block 742 on the lower end of the connecting rod 743 will slide on the inner surface of the limiting groove 741, thereby limiting the movement trajectory of the rectangular frame plate 8, thereby improving the stability of the cloth 5 during the sewing process.

[0059] Working process: When in use, the cloth 5 cut into a suitable size is initially fixed by the fixing mechanism 64. At this time, the servo motor 71 is controlled by the control box 3 to operate, and the transmission mechanism 72 is used to rotate. Under the action of the driving mechanism 62, the cloth 5 is driven to move backward continuously. At this time, the cloth 5 is continuously pulled by the tension mechanism 63. At the same time, under the guiding action of the guide mechanism 65, the fixing block 643 in the fixing mechanism 64 will continuously fix the four corners of the cloth 5, so that the cloth 5 can be adaptively adjusted to the appropriate tension. The rectangular frame plate 8 is driven to move under the action of the moving mechanism 73 and the limiting mechanism 74, so that the sewing component 4 can sew the cloth 5.

[0060] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An external sewing device for sofa production, comprising a device base (1), a cloth (5) and a rectangular frame plate (8), characterized in that: Support legs (2) are fixedly connected at the four corners of the lower end of the device base (1), a control box (3) is fixedly installed at the middle of the front end of the device base (1), a sewing component (4) is fixedly installed at the left end of the device base (1), a loading component (6) is arranged in the inner cavity of the rectangular frame plate (8), and a moving component (7) is arranged at the lower part of the inner surface of the device base (1); The loading assembly (6) comprises two rotating holes (61) opened at the left end of the rectangular frame plate (8) and extending to the right end of the rectangular frame plate (8); a driving mechanism (62) is provided in the inner cavity of the rectangular frame plate (8); the driving mechanism (62) comprises two rotating rods (621) rotatably connected to the inner surfaces of the rotating holes (61); The moving assembly (7) comprises a servo motor (71) fixedly connected to the front portion of the left end of the rectangular frame plate (8); a transmission mechanism (72) is arranged at the right end of the servo motor (71); a moving mechanism (73) is arranged at the lower end of the rectangular frame plate (8); and a limiting mechanism (74) is arranged at the lower portion of the inner surface of the device base (1); The transmission mechanism (72) comprises a round sleeve (721) fixedly connected to the left end of the first rotating rod (621) at the front, the output end of the servo motor (71) is fixedly connected to a threaded rod (723) via a coupling, the left end of the round sleeve (721) is rotatably connected to a round sleeve (722), the outer surface of the threaded rod (723) is threadedly connected to a round block (725), the outer surface of the threaded rod (723) is symmetrically provided with sliding grooves (724) on the upper and lower sides, and the inner surfaces of the two sliding grooves (724) are slidably connected to A rectangular block (727) is slidably connected to the inner surface of the round block three (725); rectangular grooves (726) slidably connected to the rectangular block (727) are symmetrically provided on the inner surfaces of the round sleeve one (721) and the round sleeve two (722) from top to bottom; a telescopic rod three (728) is symmetrically fixedly connected to the right end of the servo motor (71) at the left end of the round block three (725); a belt (729) is wound around the outer surface of the round sleeve two (722); and a roller (7210) is wound around the inner surface of the belt (729); The moving mechanism (73) comprises a connecting block four (731) fixedly connected to the four corners of the lower end of the rectangular frame plate (8); the inner surface of the connecting block four (731) on the same side is rotatably connected to a rotating rod three (732); the outer surface of the rotating rod three (732) located at the front is fixedly connected to the right end of the roller (7210); the outer surfaces of the two rotating rods three (732) are both symmetrically fixedly connected to gears (735); the lower part of the inner surface of the device base (1) is provided with concave grooves (733) symmetrically; the inner surfaces of the two concave grooves (733) are both fixedly connected to racks (734) meshing with the outer surfaces of the gears (735); Tension mechanisms (63) are symmetrically arranged at the upper end of the driving mechanism (62), and a fixing mechanism (64) is arranged at one end of each of the four tension mechanisms (63) close to each other. A guide mechanism (65) is symmetrically arranged at the upper end of the rectangular frame plate (8).

2. The external sewing device for sofa production according to claim 1, characterized in that: The outer surfaces of the two rotating rods (621) are both fixedly connected to rollers (622), and the outer surfaces of the two rollers (622) are both wrapped with hard conveyor belts (623).

3. The external sewing device for sofa production according to claim 2, characterized in that: The tension mechanism (63) comprises a connecting block 1 (631) fixedly connected to the upper end of the hard conveyor belt (623); the left end of the connecting block 1 (631) penetrates and extends to the right end of the connecting block 1 (631) and is slidably connected to a rectangular rod (632); the right part of the upper end of the rectangular rod (632) is fixedly connected to a round rod (633); the outer surface of the round rod (633) is rotatably connected to a round block 1 (634); the upper end of the round rod (633) is fixedly connected to a connecting block 2 (635); the left end of the rectangular rod (632) is fixedly connected to a round block 2 (6311); and the outer surface of the rectangular rod (632) is sleeved with a spring 1 (636). The two ends of the spring 1 (636) are fixedly connected to the right end of the round block 2 (6311) and the left end of the connecting block 1 (631) respectively; the inner surface of the connecting block 2 (635) is slidably connected to two telescopic rods 1 (637); the right ends of the two telescopic rods 1 (637) are commonly fixedly connected to an L-shaped plate (639) fixedly connected to the upper part of the right end of the connecting block 2 (635); the outer surfaces of the two telescopic rods 1 (637) are both sleeved with springs 2 (638); the upper end of the rectangular frame plate (8) is symmetrically provided with guide rail holes (6310); the outer surface of the round block 1 (634) is slidably connected to the inner surface of the guide rail hole (6310).

4. The external sewing device for sofa production according to claim 3, characterized in that: The fixing mechanism (64) comprises an L-shaped block (641) fixedly connected to the left ends of the two telescopic rods (637); the upper front end of the L-shaped block (641) passes through the rear end of the L-shaped block (641) and is rotatably connected to the second rotating rod (642); the outer surface of the second rotating rod (642) is fixedly connected to a fixing block (643); a circular groove (644) is provided on the upper side of the middle part of the right end of the fixing block (643); the left inner surface of the circular groove (644) is fixedly connected to the second telescopic rod (645); the right end of the second telescopic rod (645) is fixedly connected to a round ball (647); the outer surface of the second telescopic rod (645) is sleeved with a spring (646); the two ends of the spring (646) are respectively fixedly connected to the left inner surface of the circular groove (644) and the left outer surface of the round ball (647); the two ends of the two springs (638) are respectively fixedly connected to the left end of the connecting block (635) and the right end of the L-shaped block (641).

5. The external sewing device for sofa production according to claim 4, characterized in that: The guide mechanism (65) comprises a third connection block (651) symmetrically fixedly connected to the upper end of the rectangular frame plate (8) in the front and rear directions, and a curved plate (652) is fixedly connected to one end of the two connection blocks (651) close to each other, and a guide groove (653) is formed at the left end of the curved plate (652), and the height of the inner surface of the guide groove (653) gradually increases from the front to the back, and the outer surface of the ball (647) is slidably connected to the inner surface of the guide groove (653).

6. The external sewing device for sofa production according to claim 1, characterized in that: The limiting mechanism (74) comprises a connecting rod (743) fixedly connected to the middle of the left end and the middle of the right end of the rectangular frame plate (8); the lower part of the inner surface of the concave groove (733) is provided with limiting grooves (741) symmetrically on the left and right; and the inner surfaces of the two limiting grooves (741) are both slidably connected to limiting blocks (742) fixedly connected to the lower end of the connecting rod (743).

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