Automatic thread cutting device of sofa cushion overlock machine

Abstract

The utility model belongs to sofa pad overlock machine field, specifically is a sofa pad overlock machine automatic cutting line device, including the overlock machine, the side surface fixed connection of overlock machine has the fixed plate, the bottom surface fixed connection of fixed plate has the cutting line subassembly, the cutting line subassembly includes the drive motor fixed connection in the work table surface close to overlock machine, the back of drive motor is equipped with the band brake structure, the output fixed connection of drive motor has the connecting rod, one end fixed connection of connecting rod has the cutting blade, and the cutting blade inside is connected with the electric heating rod, through the electric heating rod of cutting blade inside sleeve connection carries out the sustained heating to the cutting blade, makes the cutting blade under the high temperature state cut the shearing force of the cutting groove to the sewing thread and melt, effectively reduces the mechanical friction loss of blade and wire, avoids the blade passivation problem, prolongs the service life of cutting blade, and the synergies of high temperature fuse and mechanical cutting promote cutting line efficiency and the cross section flatness.

Description

Technical Field

[0001] This utility model relates to the field of sofa cushion overlock machines, specifically an automatic thread cutting device for sofa cushion overlock machines. Background Technology

[0002] The automatic thread cutting device of the sofa cushion overlock machine is an automated device with mechanical cutting function, used to cut the seam after the overlock of the sofa cushion fabric is completed.

[0003] In the prior art, such as in publication number CN202415924U, an automatic thread-cutting device for an overlock machine is disclosed. This device includes a support frame fixedly mounted on the back of the overlock machine head. A cylinder is fixedly mounted on the support frame, arranged vertically downwards. A fixing block is fixedly mounted on the piston rod end of the cylinder. A connecting block is hinged to the lower end of the fixing block. A chuck is fixedly mounted on the connecting block, and a connecting rod is fixedly mounted on the chuck. One end of the connecting rod is fixedly connected to the chuck, and the other end extends through the machine head to the overlock area on the front of the machine head. A blade is fixedly mounted on the end extending to the front of the machine head. This utility model provides an automatic thread-cutting device for an overlock machine. After the garment is overlocked, the device can automatically cut the thread ends, saving workers' operation time, facilitating continuous production, and greatly improving worker efficiency.

[0004] Although the aforementioned patent cuts the seam by rotating a blade, the blade surface becomes dull after prolonged use and needs to be replaced regularly, making it impractical. Furthermore, it cannot perform intelligent operation of the cutting process, resulting in low efficiency. Therefore, an automatic thread cutting device for a sofa cushion overlock machine is proposed to address these issues. Utility Model Content

[0005] To address the shortcomings of existing technologies, such as the dulling of blades after prolonged use and the need for regular replacement, which reduces their practicality, and the inability to perform intelligent cutting operations, resulting in low efficiency, this invention proposes an automatic cutting device for sofa cushion overlock machines.

[0006] The technical solution adopted by this utility model to solve its technical problem is: the automatic cutting device for overlocking sofa cushions according to this utility model includes an overlocking machine, a fixing plate is fixedly connected to the side of the overlocking machine, a cutting component is fixedly connected to the bottom surface of the fixing plate, a worktable is fixedly connected to the bottom surface of the overlocking machine, and an intelligent control component is provided on the surface of the worktable.

[0007] The tangent assembly includes a drive motor fixedly connected to the workbench near the surface of the overlock machine. The back of the drive motor is equipped with a brake structure. A connecting rod is fixedly connected to the output end of the drive motor. A cutting blade is fixedly connected to one end of the connecting rod. An electric heating rod is sleeved inside the cutting blade. A clamping plate is rotatably connected to one end of the cutting blade. A sleeve is fixedly connected to the top surface of the clamping plate. A spring is fixedly connected to the top surface of the sleeve. A sliding rod is fixedly connected to the top surface of the spring. The sliding rod is slidably connected inside the sleeve and its top end is fixedly connected to the bottom surface of the fixing plate.

[0008] The intelligent control component includes a sleeve hole opened on the surface of the workbench and an infrared sensor sleeved in the sleeve hole. The infrared sensor is electrically connected to a control board, and the control board is electrically connected to a drive motor.

[0009] Preferably, the brake structure of the drive motor is located on its back and electrically connected to the control board.

[0010] Preferably, the surface of the workbench is provided with a cutting groove that matches the cutting blade, and a groove is provided adjacent to the cutting groove.

[0011] Preferably, the control panel is disposed inside a groove opened on the surface of the workbench, and a sealing plate is fixedly connected to the surface of the groove.

[0012] Preferably, the heating rod is arranged through the cutting blade along its axial direction and electrically connected to the control board.

[0013] Preferably, the sliding connection structure between the slide rod and the sleeve, together with the spring, constitutes the elastic reset mechanism of the cutting blade.

[0014] The advantages of this utility model are:

[0015] 1. This utility model uses an electric heating rod sleeved inside the cutting blade to continuously heat the cutting blade, so that the cutting blade, under high temperature, combines with the shearing force of the cutting groove to melt and cut the thread, effectively reducing mechanical friction wear between the blade and the thread, avoiding blade dulling, and extending the service life of the cutting blade. At the same time, the synergistic effect of high temperature melting and mechanical cutting improves the cutting efficiency and the flatness of the cross-section.

[0016] 2. This utility model uses an infrared sensor in the intelligent control component set on the surface of the workbench to detect the fabric overlock completion signal in real time, triggering the control board to synchronously control the start and stop of the drive motor and the action of the brake structure, realizing fully automatic intelligent overlock operation, reducing manual intervention, and improving response speed and work continuity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the tangent assembly structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the intelligent control component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0022] In the diagram: 1. Overlock machine; 2. Fixing plate; 3. Cutting assembly; 31. Drive motor; 32. Connecting rod; 33. Cutting blade; 34. Heating rod; 35. Clamping plate; 36. Sleeve; 37. Spring; 38. Slide rod; 4. Workbench; 5. Intelligent control assembly; 51. Infrared sensor; 52. Control board; 6. Sealing plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1-4As shown, an automatic thread cutting device for a sofa cushion overlock machine includes an overlock machine 1. A fixing plate 2 is fixedly connected to the side of the overlock machine 1. A thread cutting assembly 3 is fixedly connected to the bottom surface of the fixing plate 2. A workbench 4 is fixedly connected to the bottom surface of the overlock machine 1. An intelligent control assembly 5 is provided on the surface of the workbench 4. The thread cutting assembly 3 includes a drive motor 31 fixedly connected to the workbench 4 near the surface of the overlock machine 1. A brake structure is provided on the back of the drive motor 31. A connecting rod 32 is fixedly connected to the output end of the drive motor 31. A cutting blade 33 is fixedly connected to one end of the connecting rod 32. An electric heating rod 34 is sleeved inside the cutting blade 33. A clamping plate 35 is rotatably connected to one end of the cutting blade 33. A sleeve 36 is fixedly connected to the top surface of the clamping plate 35. A spring 37 is fixedly connected to the top surface of the sleeve 36. A sliding rod 38 is fixedly connected to the top surface of the spring 37. The sliding rod 38 is slidably connected inside the sleeve 36 and its top end is fixedly connected to the bottom surface of the fixing plate 2.

[0025] During operation, the heating rod 34 inside the cutting blade 33 is heated by the control board 52 (model Siemens LOGO! 8 12 / 24RCE) to keep the cutting blade 33 at a high temperature during the cutting process. When the drive motor 31 drives the cutting blade 33 to rotate downward through the connecting rod 32, the high-temperature blade engages with the cutting groove on the surface of the worktable 4, and uses shearing force and melting action to cut the seam simultaneously, reducing mechanical friction wear on the blade. At the same time, the spring 37, after being compressed, slides back through the slide rod 38 in the sleeve 36 to accelerate the reset of the cutting blade 33, thereby increasing the cutting frequency and the blade's service life.

[0026] Furthermore, the intelligent control component 5 includes a sleeve hole opened on the surface of the workbench 4 and an infrared sensor 51 sleeved in the sleeve hole. The infrared sensor 51 is electrically connected to a control board 52, and the control board 52 is electrically connected to a drive motor 31.

[0027] During operation, the Omron E3Z-T61 infrared sensor 51 is embedded in the sleeve hole of the worktable 4. When it detects that the fabric overlocking is complete, it sends a signal to the control board 52. The control board 52 triggers the drive motor 31 to start and precisely controls the rotation angle through the brake structure, driving the cutting blade 33 to rotate around the clamping plate 35 to complete the cutting action.

[0028] Furthermore, the surface of the worktable 4 is provided with a cutting groove that matches the cutting blade 33, and a groove is provided adjacent to the cutting groove;

[0029] During operation, the cutting groove on the surface of the worktable 4 perfectly matches the shape of the cutting blade 33. When the drive motor 31 rotates the cutting blade 33 downwards, the blade embeds itself in the cutting groove to form a closed shearing surface, ensuring that the thread is precisely cut. The control plate 52 is embedded in the groove adjacent to the cutting groove. The depth of the groove matches the thickness of the sealing plate 6. The sealing plate 6 is fixed to the surface of the groove with screws, keeping the worktable 4 flat and preventing the fabric from being obstructed by the protruding structure when moving. This structure improves cutting accuracy and shearing efficiency through the guiding effect of the cutting groove, optimizes space utilization through the hidden layout of the groove and the control plate 52, and protects the control plate 52 from external dust contamination by the sealing plate 6.

[0030] Furthermore, the control panel 52 is located inside a groove on the surface of the workbench 4, and a sealing plate 6 is fixedly connected to the surface of the groove.

[0031] During operation, the control board 52 is installed in a groove on the surface of the workbench 4. The bottom of the groove has a fixing clip and heat dissipation holes. The control board 52 is fixed to the inner wall of the groove with screws. The sealing plate 6 covers the groove opening and is tightly fitted to the surface of the workbench 4 with a sealing strip, ensuring that the control board 52 is isolated from the external environment. This structure, through the protective design of the groove, prevents the control board 52 from being damaged by mechanical impact during fabric handling or cutting. The sealing performance of the sealing plate 6 prevents liquid or lint from entering, extending the service life of the control board 52.

[0032] Working principle: After the sofa cushion fabric completes the overlocking operation on the overlocking machine 1, the infrared sensor 51 on the surface of the worktable 4 detects the fabric movement signal and transmits it to the control board 52. The control board 52 synchronously starts the drive motor 31 and the heating rod 34. The heating rod 34 heats the cutting blade 33 to reach its melting temperature. The drive motor 31 drives the cutting blade 33 to rotate downward around the rotation point of the clamping plate 35 through the connecting rod 32. The cutting blade 33 embeds into the cutting groove on the surface of the worktable 4 to form a shearing force. At the same time, the spring 37 is stopped by the sliding of the slide rod 38 in the sleeve 36. The spring 37 releases its elastic potential energy to accelerate the cutting motion of the blade when it contacts the thread, and the high temperature melting effect quickly cuts the thread. After the cutting is completed, the drive motor 31 is precisely braked by the brake structure, and the control board 52 controls the drive motor 31 to reset in the opposite direction. The cutting blade 33 is removed from the cutting groove and is supported by the clamping plate 35 to return to its initial position. The spring 37 only provides instantaneous acceleration during the cutting phase. The reset action is completed independently by the drive motor 31. The control board 52 in the groove sealed by the sealing plate 6 continuously monitors the infrared signal and responds to the next operation cycle.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic thread cutting device for a sofa cushion overlock machine, characterized in that: The device includes an overlock machine (1), a fixing plate (2) is fixedly connected to the side of the overlock machine (1), a tangent assembly (3) is fixedly connected to the bottom surface of the fixing plate (2), a workbench (4) is fixedly connected to the bottom surface of the overlock machine (1), and an intelligent control assembly (5) is provided on the surface of the workbench (4). The tangent assembly (3) includes a drive motor (31) fixedly connected to the surface of the workbench (4) near the overlock machine (1). The back of the drive motor (31) is provided with a brake structure. The output end of the drive motor (31) is fixedly connected to a connecting rod (32). One end of the connecting rod (32) is fixedly connected to a cutting blade (33). The cutting blade (33) is fitted with a heating rod (34). One end of the cutting blade (33) is rotatably connected to a clamping plate (35). The top surface of the clamping plate (35) is fixedly connected to a sleeve (36). The top surface of the sleeve (36) is fixedly connected to a spring (37). The top surface of the spring (37) is fixedly connected to a sliding rod (38). The sliding rod (38) is slidably connected inside the sleeve (36) and its top end is fixedly connected to the bottom surface of the fixing plate (2). The intelligent control component (5) includes a sleeve hole opened on the surface of the workbench (4) and an infrared sensor (51) sleeved in the sleeve hole. The infrared sensor (51) is electrically connected to a control board (52), and the control board (52) is electrically connected to a drive motor (31).

2. The automatic thread cutting device for a sofa cushion overlock machine according to claim 1, characterized in that: The brake structure of the drive motor (31) is located on its back and is electrically connected to the control board (52).

3. The automatic thread cutting device for a sofa cushion overlock machine according to claim 1, characterized in that: The workbench (4) has a cutting groove on its surface that matches the cutting blade (33), and a groove is provided adjacent to the cutting groove.

4. The automatic thread cutting device for a sofa cushion overlock machine according to claim 1, characterized in that: The control panel (52) is located inside a groove on the surface of the workbench (4), and a sealing plate (6) is fixedly connected to the surface of the groove.

5. The automatic thread cutting device for a sofa cushion overlock machine according to claim 1, characterized in that: The heating rod (34) is axially inserted along the cutting blade (33) and electrically connected to the control board (52).

6. The automatic thread cutting device for a sofa cushion overlock machine according to claim 1, characterized in that: The sliding connection structure of the slide rod (38) and the sleeve (36) together with the spring (37) constitutes the elastic reset mechanism of the cutting blade (33).

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