Sofa iron stand automatic tension spring equipment and tension spring method

Abstract

The invention discloses automatic spring tension equipment for a sofa iron stand and a spring tension method. The supporting mechanism is assembled on the operation table to support a sofa iron stand with a tension spring, and one end of the tension spring is connected with one end of the sofa iron stand; the fixing mechanism is assembled on the operation table so as to keep the sofa iron stand and the operation table relatively fixed; the pushing mechanism is arranged on the operation table in a sliding manner so as to push the other end of the tension spring to move towards the other end of the sofa iron stand, so that the other end of the tension spring is overlapped at an opening of a hook-shaped part at the other end of the sofa iron stand; according to the sofa iron stand tension spring assembling device, automatic assembling of the sofa iron stand tension springs is achieved, one or more tension springs on one sofa iron stand can be assembled at the same time, manual operation does not need to be carried out one by one, the production speed is greatly increased, the production efficiency is improved, and the production cost is reduced. And the labor consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sofa tension spring assembly, in particular to an automatic tension spring device for a sofa iron frame and a tension spring method. Background Art

[0002] In the sofa manufacturing industry, the stability and comfort of the sofa frame largely depend on the assembly quality and efficiency of the tension spring. Traditional sofa frame tension springs, especially snake springs, are widely used in various sofa structures due to their unique elasticity and support performance. However, the existing sofa frame tension spring assembly methods mostly rely on manual operation, and each sofa product usually needs to be assembled with multiple snake springs to ensure the stability and comfort of the sofa structure.

[0003] This manual spring pulling method has obvious disadvantages. First, the production efficiency is low. Since the springs need to be pulled one by one, it is not only time-consuming, but also easy to reduce the assembly speed due to worker fatigue. Secondly, the work intensity of employees is high. Manually pulling the spring requires workers to exert a lot of physical strength and energy. Long-term work can easily cause worker fatigue and physical discomfort, which in turn affects work efficiency and assembly quality. Summary of the invention

[0004] In order to overcome at least one defect of the prior art, the present invention provides an automatic spring tensioning device for a sofa iron frame, which can solve the limitation of manual spring tensioning and improve the spring tensioning efficiency and assembly quality.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] An automatic spring tensioning device for a sofa iron frame comprises: an operating table; a supporting mechanism, which is mounted on the operating table and is used to support the sofa iron frame with a tension spring, one end of the tension spring being connected to one end of the sofa iron frame; a fixing mechanism, which is mounted on the operating table and is used to keep the sofa iron frame and the operating table relatively fixed; a pushing mechanism, which is slidably mounted on the operating table and is used to push the other end of the tension spring to move toward the other end of the sofa iron frame so that the other end of the tension spring is overlapped at the opening of a hook-shaped portion at the other end of the sofa iron frame; and an adjusting mechanism, which is used to adjust the rotation of the hook-shaped portion so as to connect the other end of the tension spring to the hook-shaped portion.

[0007] By adopting the above scheme, the automatic assembly of the tension spring of the sofa iron frame is realized, and one or more tension springs on a sofa iron frame can be assembled at the same time, without having to assemble them one by one as in manual operation. This batch processing capability greatly speeds up production and reduces the amount of labor used; each mechanism is precisely designed and debugged to ensure that the position and tension of the tension spring during the assembly process are in the optimal state. This helps to improve the overall quality and stability of the sofa, and compared with manual tension springs, it can reduce assembly errors caused by human operating errors.

[0008] Furthermore, the pushing mechanism includes: a sliding track, which is arranged on the operating table; a pushing plate, which includes an assembly surface and a pushing surface, and the pushing surface is provided with a slot, and the other end of the tension spring is provided with a stepped clamping portion corresponding to the slot, and the clamping portion is clamped in the slot; a pushing electric cylinder, which is assembled on the operating table, and the output end of the pushing electric cylinder is connected to the assembly surface of the pushing plate to push the pushing plate to slide along the sliding track.

[0009] By adopting the above scheme, the design of the sliding track ensures the stability and accuracy of the pushing mechanism during the sliding process, avoids assembly errors caused by shaking or deviation, and the slot can tightly clamp the stepped clamping part at the other end of the tension spring to ensure that the tension spring will not fall off or deviate during the pushing process.

[0010] Furthermore, at least two sliding rails are provided, the length direction of the pushing plate is perpendicular to the sliding rails, and a sliding seat is provided between the pushing plate and each of the sliding rails.

[0011] By adopting the above solution, better support and stability can be provided to prevent the push plate from deflecting or shaking during the sliding process; the design of the sliding seat can reduce the friction between the push plate and the sliding track, making the push plate smoother and more stable during the sliding process.

[0012] Furthermore, the supporting mechanism includes a plurality of supporting clips, and the supporting clips include: a clip assembly portion, which is detachably connected to the operating table; a step card platform, which includes a first supporting surface and a second abutting surface, the first supporting surface abuts against the bottom surface of the sofa iron frame, and the second abutting surface abuts against the inner side or outer side of the sofa iron frame; wherein the plurality of supporting clips are arranged around the edge of the sofa iron frame.

[0013] By adopting the above scheme, the first supporting surface abuts against the bottom surface of the sofa iron frame to ensure that the sofa iron frame can be placed stably on the supporting clamp; the second abutting surface abuts against the inner or outer side of the sofa iron frame, and the supporting clamp can be assembled according to the specific shapes and sizes of different models of sofa iron frames to ensure that the second abutting surface can fit tightly on the edge of the sofa iron frame.

[0014] Furthermore, the fixing mechanism includes a first fixing device located at one end of the sofa iron frame and / or a second fixing device located at the other end of the sofa iron frame.

[0015] By adopting the above scheme, the first fixing device can fix the sofa iron frame by clamping, locking or adsorption, depending on the material and shape of the sofa iron frame. The first fixing device and the second fixing device are respectively located at the two ends of the sofa iron frame. Under the action of the pushing mechanism and the adjusting mechanism, the tension spring can be accurately assembled on the sofa iron frame without affecting the assembly quality due to the movement or displacement of the sofa iron frame.

[0016] Further, the first fixing device and / or the second fixing device include: a connecting pile, which is mounted on the operating table and has a rotating shaft hole; a rotating member, one end of which is provided with a pressure plate, and the pressure plate provides a force for the sofa iron frame to prevent it from moving away from the operating table; a rotating shaft rod, which is passed through the middle of the rotating member, and both ends are respectively rotatably connected to a rotating shaft hole of the connecting pile; a traction rod, which is connected to the other end of the rotating member; a driving member, which is mounted on the operating table, and the output end of the driving member is rotatably connected to the traction rod, and the driving member is used to drive the rotating member to rotate around the rotating shaft rod.

[0017] By adopting the above scheme, the stability of the sofa iron frame during the tension spring assembly process is ensured by the pressing effect of the pressing plate on the sofa iron frame; the driving member can adjust the pressing degree of the pressing plate on the sofa iron frame to adapt to sofa iron frames of different specifications and models; the pressing and releasing operations of the pressing plate can be easily realized by starting and reversing the driving member.

[0018] Furthermore, the quantitative relationship between the pressure plate and the rotating member is 1:N, N≥1; the quantitative relationship between the traction rod and the rotating member is 1:N, N≥1; and the number of the connecting piles is N+1.

[0019] By adopting the above scheme, multiple rotating parts can be driven by one traction rod, saving the number of driving parts; multiple rotating parts can apply pressure to the same pressing plate, thereby ensuring that the force on the pressing plate is more even, ensuring the stability of the pressure of the pressing plate on the sofa iron frame.

[0020] Furthermore, the adjusting mechanism includes: an adjusting electric cylinder, which is mounted on the operating table; a bracket, which is connected to the output end of the adjusting electric cylinder to realize its own lifting and lowering in the vertical direction, and the bracket is provided with a concave bracket; a horizontal rod, which is mounted in the bracket, and the top surface of the horizontal rod is against the bottom of the hook-shaped portion.

[0021] By adopting the above scheme, the output end of the adjusting electric cylinder pushes the bracket to rise and fall in the vertical direction. At the same time, the bracket transmits the lifting force to the hook part of the sofa iron frame through the horizontal rod in the bracket, so that the hook part rotates and rises until it is connected to the other end of the tension spring.

[0022] Furthermore, it also includes a controller and a switch key, wherein the switch key is arranged on one side of the operating table and is used to control the start and stop of the supporting mechanism, the fixing mechanism, the pushing mechanism and the adjusting mechanism.

[0023] By adopting the above solution, it is ensured that the entire system can be started, stopped and controlled in a predetermined manner, providing users with a safe, stable and easy-to-use operating experience.

[0024] A spring tensioning method of an automatic spring tensioning device for a sofa iron frame comprises the following steps: using a controller to set a fixing mechanism to a non-fixed state, and adjusting an adjusting mechanism and a pushing mechanism to an initial state; placing the sofa iron frame on a supporting mechanism, and ensuring that one end of the sofa iron frame is connected to one end of a tension spring; adjusting the position of the pushing mechanism on an operating table so that the other end of the tension spring contacts the supporting mechanism; triggering a switch key, the controller immediately controls the pushing mechanism to move, driving the other end of the tension spring to extend toward the other end of the sofa iron frame, and the fixing mechanism is synchronously started to fix the sofa iron frame; when the fixing mechanism is in a fixed state and the pushing mechanism slides to the end end, the controller controls the adjusting device to start, and rotates a hook-shaped portion at the other end of the sofa iron frame toward the tension spring, so as to realize the clamping connection between the tension spring and the hook-shaped portion; the controller controls the fixing mechanism to return to a non-fixed state again, and resets the adjusting mechanism and the pushing mechanism to an initial state.

[0025] By adopting the above solution, the entire spring tensioning process is highly automated. Through the cooperation of the controller and the switch, precise control of each mechanism is achieved. The movement position and speed of each mechanism can be accurately adjusted by the controller to ensure that the tension spring can be correctly connected to the sofa iron frame.

[0026] In summary, the automatic spring tensioning device and spring tensioning method for a sofa iron frame provided by the present invention have the following technical effects:

[0027] 1. Through the automated process, the equipment can simultaneously process the assembly of one or more tension springs on the sofa iron frame without manual operation one by one, which greatly shortens the production cycle, reduces the use of labor, and reduces the dependence on the number and skills of workers, thereby improving the overall production efficiency;

[0028] 2. Compared with manual operation, automated equipment can significantly reduce assembly errors caused by human error, improve the overall quality and stability of the sofa, and can accurately control the movement position and speed of each mechanism to ensure that the position and tension of the tension spring during the assembly process are in the optimal state;

[0029] 3. It has a certain versatility and can adapt to sofa iron frames of different models and specifications, which improves the flexibility of production. The various mechanisms of the equipment are easy to replace, adjust and maintain, which is convenient for rapid adjustment and optimization according to production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the connection structure between the support mechanism and the sofa frame of an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the side structure of the support mechanism and the sofa frame of an embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the exploded structure of the support mechanism and the sofa frame of an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the connection structure between the operating table and the pushing mechanism according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the exploded structure of the operating platform and the driving mechanism of an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the connection structure between the fixing mechanism and the sofa iron frame of an embodiment of the present invention;

[0037] Figure 8 It is a schematic diagram of a partial explosion structure of a fixing mechanism according to an embodiment of the present invention;

[0038] Fig. 9 It is a schematic diagram of the partial explosion structure of the regulating mechanism according to an embodiment of the present invention.

[0039] The meanings of the reference numerals are as follows: 1. operating table; 11. assembly hole; 12. reserved hole for rotation; 13. assembly hole for adjusting electric cylinder; 14. vertical plate hole; 2. supporting mechanism; 21. supporting clamp; 211. clamp assembly part; 212. step clamp; 2121. first supporting surface; 2122. second abutting surface; 3. fixing mechanism; 31. first fixing device; 32. second fixing device; 33. connecting pile; 331. rotating shaft hole; 332. fracture; 34. rotating part; 341. bending part; 342. bearing; 35. rotating shaft rod; 36. traction rod; 37. driving part; 371. driving part frame; 38. connecting rod ;39. Pressing plate;4. Pushing mechanism;41. Sliding track;411. Groove;42. Pushing plate;421. Assembly surface;422. Pushing surface;4221. Card slot;43. Pushing electric cylinder;44. Pushing electric cylinder fixing bracket;45. Vertical plate;46. Sliding seat;461. Sliding cavity;462. Card edge;5. Adjusting mechanism;51. Adjusting electric cylinder;52. Bracket;521. Bracket;53. Horizontal rod;54. L-shaped plate;6. Sofa iron frame;61. Hanging piece;62. Hook piece;621. Hook-shaped part;63. Tension spring;631. Card connection part;7. Cabinet;71. Tripod;72. Heat dissipation device;73. Switch. DETAILED DESCRIPTION

[0040] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In order to facilitate the understanding of the embodiments of the present invention, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0044] Embodiment 1 of the present invention refers to Figure 1-Figure 9 As shown, an automatic spring tensioning device for a sofa iron frame is disclosed, comprising an operating table 1, a supporting mechanism 2, a fixing mechanism 3, a pushing mechanism 4 and an adjusting mechanism 5. The supporting mechanism 2 is assembled on the operating table 1 and is used to support a sofa iron frame 6 having a tension spring 63. Specifically, the sofa iron frame 6 is a seat frame of a sofa seat, so it is usually a rectangular frame, and a plurality of serpentine tension springs 63 are arranged in the center thereof. When the tension spring 63 is not assembled, one end of the tension spring 63 is connected to one end of the sofa iron frame 6, and the connection method is not limited to Welding or clamping, in this embodiment 1, both ends of the sofa iron frame 6 are welded or screwed with hangers 61, one end of the tension spring 63 is hooked with the hanger 61 to complete the connection, and the hanger 61 at the other end of the sofa iron frame 6 is also hung with a hook 62, and the two ends of the hook 62 are bent into hook-shaped portions 621, and the center of the hook 62 is hooked with the hanger 61. In a natural state, the hook-shaped portion 621 of the hook 62 will naturally droop to the adjusting mechanism 5 under the influence of gravity, and the hook-shaped portion 621 can be rotated upward through the adjusting mechanism 5. The fixing mechanism 3 is mounted on the operating table 1, and is used to keep the sofa iron frame 6 relatively fixed with the operating table 1; the pushing mechanism 4 is slidably mounted on the operating table 1, and the pushing mechanism 4 is used to push the other end of the tension spring 63 to move toward the other end of the sofa iron frame 6, so that the other end of the tension spring 63 is overlapped at the opening of the hook-shaped portion 621 at the other end of the sofa iron frame 6; the adjusting mechanism 5 is used to adjust the rotation of the hook-shaped portion 621 to connect the other end of the tension spring 63 with the hook-shaped portion 621, thereby realizing the automatic assembly of the tension spring 63 of the sofa iron frame 6, and one or more tension springs 63 on a sofa iron frame 6 can be assembled at the same time, without the need to do it one by one like manual operation. This batch processing capability greatly speeds up the production speed and reduces the amount of manual use; each mechanism is precisely designed and debugged to ensure that the position and tension of the tension spring 63 during the assembly process are in the best state. This helps to improve the overall quality and stability of the sofa, and compared with the manual tension spring 63, it can reduce assembly errors caused by human operation errors.

[0045] In a specific embodiment, the pushing mechanism 4 includes a sliding rail 41, a pushing plate 42 and a pushing electric cylinder 43. The sliding rail 41 is arranged on the operating table 1. The pushing plate 42 includes an assembly surface 421 and a pushing surface 422. The pushing surface 422 is provided with a clamping groove 4221. The other end of the tension spring 63 is provided with a stepped clamping portion 631 corresponding to the clamping groove 4221. The clamping portion 631 is clamped in the clamping groove 4221. The pushing electric cylinder 43 is assembled on the operating table 1. The output end of the pushing electric cylinder 43 is connected to the assembly surface 421 of the pushing plate 42 to push the pushing plate 42 to slide along the sliding rail 41. The design of the sliding rail 41 ensures the stability and accuracy of the pushing mechanism 4 during the sliding process, and avoids assembly errors caused by shaking or offset. The clamping groove 4221 can tightly clamp the stepped clamping portion 631 at the other end of the tension spring 63 to ensure that the tension spring 63 will not fall off or offset during the pushing process.

[0046] In order to improve the assembly stability of the pushing electric cylinder 43, in this embodiment 1, a pushing electric cylinder fixing frame 44 is arranged between the pushing electric cylinder 43 and the operating table 1, and the pushing electric cylinder fixing frame 44 is bolted to the bottom of the operating table 1, and the pushing electric cylinder 43 is fixed to the pushing electric cylinder fixing frame 44, and the output end of the pushing electric cylinder 43 is connected with a vertical plate 45 through the pushing electric cylinder fixing frame 44, and the vertical plate 45 is fixed to the middle part of the assembly surface 421, and a vertical plate hole 14 for the vertical plate 45 to slide is provided on the operating table 1.

[0047] In some embodiments, in order to improve the stability of the push plate 42 sliding along the sliding rail 41 and reduce horizontal shaking, the sliding rail 41 is provided with at least two. In this embodiment 1, the sliding rail 41 is provided with two and is bolted and fixed to the operating table 1. The length direction of the push plate 42 is perpendicular to the sliding rail 41. A sliding seat 46 is provided between the push plate 42 and each of the sliding rails 41, which can provide better support and stability and prevent the push plate 42 from deflecting or shaking during the sliding process. The design of the sliding seat 46 can reduce the friction between the push plate 42 and the sliding rail 41, so that the push plate 42 is smoother and more stable during the sliding process. Specifically, the sliding rail 41 is similar to the structure of a railway track, and grooves 41 are provided on both sides thereof. A sliding cavity 461 adapted to the sliding rail 41 is provided at the bottom of the sliding seat 46, and a clamping edge 462 engaged with the groove 411 is provided on the edge of the sliding cavity 461, thereby preventing the sliding seat 46 from detaching from the sliding rail 41 during the sliding process. The sliding seat 46 is in the shape of a right-angled triangular prism, wherein the sliding cavity 461 is located at a right-angled surface, and the other right-angled surface is assembled on the assembly surface 421, and two sliding seats 46 are arranged on both sides of the vertical plate 45. When the clamping groove 4221 abuts against the clamping portion 631 of the tension spring 63, the vertical plate 45 and the sliding seat 46 are stressed at the same time, so as to prevent the pushing plate 42 from being deformed by stress.

[0048] In a specific embodiment, the support mechanism 2 includes a plurality of support clips 21, and the support clips 21 include a clip assembly portion 211 and a step card platform 212. The clip assembly portion 211 is detachably connected to the operating table 1, preferably screwed, and the step card platform 212 includes a first support surface 2121 and a second abutment surface 2122, the first support surface 2121 abuts against the bottom surface of the sofa iron frame 6, and the second abutment surface 2122 abuts against the inner side or outer side of the sofa iron frame 6; wherein, a plurality of the support clips 21 are arranged around the edge of the sofa iron frame 6, the first support surface 2121 abuts against the bottom surface of the sofa iron frame 6 to ensure that the sofa iron frame 6 can be stably placed on the support clips 21; the second abutment surface 2122 abuts against the inner side or outer side of the sofa iron frame 6, and the support clips 21 can be positionally assembled according to the specific shapes and sizes of sofa iron frames 6 of different models to ensure that the second abutment surface 2122 can fit tightly against the edge of the sofa iron frame 6. In the present embodiment 1, the support clamps 21 are respectively arranged at the four edges of the sofa iron frame 6, and at least one support clamp 21 is arranged at each edge. The operating table 1 is provided with a plurality of assembly holes 11, and the support clamps 21 can be assembled to the corresponding positions according to the sizes of different sofa iron frames 6. The second abutting surface 2122 of the support clamp 21 can abut against the outer side of the edge of the sofa iron frame 6 at the same time, and can also abut against the inner side of the edge of the sofa iron frame 6 at the same time, or can be mixed and matched, and it is necessary to ensure that the second abutting surfaces 2122 of every two relative support clamps 21 are arranged relative to each other or back to back. In other embodiments, the support mechanism 2 can also have other structures that can limit the horizontal movement of the sofa iron frame 6, and this embodiment does not make specific restrictions.

[0049] In some embodiments, the fixing mechanism 3 includes a first fixing device 31 located at one end of the sofa iron frame 6 and / or a second fixing device 32 located at the other end of the sofa iron frame 6. The first fixing device 31 can fix the sofa iron frame 6 by clamping, locking or adsorption, etc., depending on the material and shape of the sofa iron frame 6. The first fixing device 31 and the second fixing device 32 are respectively located at the two ends of the sofa iron frame 6. Under the action of the pushing mechanism 4 and the adjusting mechanism 5, the tension spring 63 can be accurately assembled on the sofa iron frame 6 without affecting the assembly quality due to the movement or offset of the sofa iron frame 6. Optionally, the fixing mechanism 3 can be a binding strap, by which the sofa iron frame 6 is bound to the operating table 1 or the supporting mechanism 2, and of course the sofa iron frame 6 can also be fixed to the operating table 1 or the supporting mechanism 2 by bolts. Therefore, only the first fixing device 31 can be set in the fixing mechanism 3, or only the second fixing device 32 can be set, and of course the first fixing device 31 and the second fixing device 32 can also be set at the same time.

[0050] In the present embodiment 1, the first fixing device 31 and the second fixing device 32 are both provided and are centrally symmetrical. Specifically, the first fixing device 31 and the second fixing device 32 both include a connecting pile 33, a rotating member 34, a rotating shaft rod 35, a traction rod 36 and a driving member 37. The connecting pile 33 is assembled on the operating table 1 by bolts. A rotating shaft hole 331 is provided on the connecting pile 33. A pressing plate 39 is provided at one end of the rotating member 34. The pressing plate 39 provides a force for the sofa iron frame 6 to avoid being away from the operating table 1. The rotating shaft rod 35 is penetrated in the middle of the rotating member 34, and the two ends are respectively connected to the rotating shaft hole of the connecting pile 33. 331 is rotatably connected, the traction rod 36 is connected to the other end of the rotating member 34, the driving member 37 is assembled on the operating table 1, and the output end of the driving member 37 is rotatably connected to the traction rod 36. The driving member 37 is used to drive the rotating member 34 to rotate with the rotating shaft rod 35 as the axis. The pressing effect of the pressing plate 39 on the sofa iron frame 6 ensures the stability of the sofa iron frame 6 during the assembly process of the tension spring 63; the driving member 37 can adjust the pressing degree of the pressing plate 39 on the sofa iron frame 6 to adapt to sofa iron frames 6 of different specifications and models; the pressing and releasing operations of the pressing plate 39 can be easily realized by starting and reversing the driving member 37. It should be noted that the driving member 37 is an electric cylinder.

[0051] In order to facilitate the smooth rotation of the rotating member 34, in some embodiments, a connecting rod 38 is further provided between the traction rod 36 and the output end of the driving member 37. There is no specific restriction on the structure and number of the optional connecting rod 38 as long as it can achieve a rotation effect. The two ends of the connecting rod 38 are respectively hinged to the traction rod 36 and the output end of the driving member 37, so that the drive is smoother and the possibility of jamming is reduced.

[0052] In order to facilitate the pressing plate 39 connected to the rotating member 34 to press the sofa iron frame 6, the rotating member 34 is provided with a bending portion 341, and the bending portion 341 makes the rotating member 34 bend toward one side of the sofa iron frame 6, so that the rotating member 34 can achieve the pressing effect on the sofa iron frame 6 without rotating a large angle.

[0053] In the present embodiment 1, the shaft hole 331 of the connecting pile 33 is provided with a break 332. By providing the break 332, the diameter of the shaft hole 331 can be adjusted to a certain extent, thereby facilitating the assembly of the shaft rod 35. The shaft rod 35 can be fixed in the break 332 by screw-locking the break 332. The shaft rod 35 is rotationally connected with the rotating member 34. Optionally, a bearing 342 is provided between the rotating member 34 and the shaft rod 35, and relative rotation between the two is achieved by providing the bearing 342. The pressing plate 39 is bolted to the ends of the plurality of rotating members 34 to achieve a synchronous control effect on the pressing plate 39.

[0054] In order to reduce the space occupied above the operating table 1, a rotation reserved hole 12 is provided on the operating table 1 for the rotating member 34 to partially pass through. The rotation reserved hole 12 allows the rotating member 34 to be partially hidden under the operating table 1, and the driving member 37 can also be hidden under the operating table 1, thereby saving a large amount of space. Since the driving member 37 is provided under the operating table 1, it is necessary to add a driving member frame 371 to fix the driving member 37 to the bottom surface of the operating table 1 to improve the stability of the driving member 37.

[0055] It should be noted that the quantitative relationship between the pressure plate 39 and the rotating member 34 is 1:N, N≥1; the quantitative relationship between the traction rod 36 and the rotating member 34 is 1:N, N≥1; the number of the connecting piles 33 is N+1, and multiple rotating members 34 can be driven by one traction rod 36, saving the number of driving members 37; multiple rotating members 34 can apply pressure to the same pressure plate 39, thereby ensuring that the force on the pressure plate 39 is more even, ensuring the stability of the pressure of the pressure plate 39 on the sofa iron frame 6. The connecting pile 33 is used to support and fix the shaft rod 35 so that the rotating member 34 can rotate around it. Both ends of each rotating member 34 need to be connected to the shaft hole 331 of the connecting pile 33, so the number of connecting piles 33 needs to be one more than the number of rotating members 34 to ensure that each rotating member 34 can be firmly supported. In this embodiment 1, N is 3.

[0056] In some embodiments, the adjusting mechanism 5 includes an adjusting electric cylinder 51, a bracket 52 and a horizontal rod 53. The adjusting electric cylinder 51 is mounted on the operating table 1. The bracket 52 is connected to the output end of the adjusting electric cylinder 51 to realize its own lifting and lowering in the vertical direction. The bracket 52 is provided with a concave bracket 521. The horizontal rod 53 is mounted in the bracket 521. The top surface of the horizontal rod 53 is against the bottom of the hook-shaped portion 621. The output end of the adjusting electric cylinder 51 pushes the bracket 52 to lift and lower in the vertical direction. At the same time, the bracket 52 transmits the lifting force to the hook-shaped portion 621 of the sofa iron frame 6 through the horizontal rod 53 in the bracket 521, so that the hook-shaped portion 621 rotates and lifts until it is connected to the other end of the tension spring 63. In some implementations, in order to reduce the large space occupied by the adjusting electric cylinder 51 above the operating table 1, which will greatly reduce its lifting space, an adjusting electric cylinder assembly hole 13 is provided on the operating table 1, and the adjusting electric cylinder 51 is inserted into the adjusting electric cylinder assembly hole 13 and fixed by screws, thereby reserving the lifting space of the horizontal rod 53 above the operating table 1. In this embodiment 1, in order to prevent the screws between the adjusting electric cylinder 51 and the adjusting electric cylinder assembly hole 13 from being damaged due to large force, an L-shaped plate 54 is also provided on the operating table 1, one side of the L-shaped plate is bolted to the operating table 1, and the other end is bolted to the side wall of the adjusting electric cylinder 51, and the adjusting electric cylinder 51 can be partially inserted into the adjusting electric cylinder assembly hole 13, thereby improving the assembly stability.

[0057] In order to realize intelligent control, the present embodiment 1 also includes a controller and a switch 73. The switch 73 is arranged on one side of the operating table 1, and is used to control the start and stop of the supporting mechanism 2, the fixing mechanism 3, the pushing mechanism 4 and the adjusting mechanism 5, ensuring that the entire system can be started and stopped and controlled in a predetermined manner, providing users with a safe, stable and easy-to-use operating experience. The controller is arranged below the operating table 1, and can be shielded and protected. Optionally, a cabinet 7 can also be connected below the operating table 1, and the controller is arranged in the cabinet 7. A tripod 71 is arranged at the bottom of the cabinet 7, and a heat dissipation device 72 can be added to the side wall of the cabinet 7 to dissipate heat for the electric cylinders in the supporting mechanism 2, the fixing mechanism 3, the pushing mechanism 4 and the adjusting mechanism 5.

[0058] The present invention also relates to a spring tensioning method of an automatic spring tensioning device for a sofa iron frame, comprising the following steps: using a controller to set the fixing mechanism 3 to a non-fixed state, that is, the pressure plates 39 in the first fixing device 31 and the second fixing device 32 are opened and away from the supporting mechanism 2, and at the same time, the adjusting mechanism 5 and the pushing mechanism 4 are adjusted to an initial state, the initial state of the adjusting mechanism 5 is downward, and the initial state of the pushing mechanism 4 is located at one end of the sliding track 41 close to the first fixing device 31; placing the sofa iron frame 6 on the supporting mechanism 2, and ensuring that one end of the sofa iron frame 6 is connected to one end of the tension spring 63; adjusting the position of the pushing mechanism 4 on the operating table 1 so that the other end of the tension spring 63 contacts the supporting mechanism 2; triggering the switch key 73, the controller immediately controls the pushing mechanism 4 to move, driving the other end of the tension spring 63 to extend toward the other end of the sofa iron frame 6, and at the same time, the fixing mechanism 3 synchronously starts to fix the sofa iron frame 6. In some embodiments, the fixing mechanism 3 can also be started first and then the pushing mechanism 4 is started. The fixing mechanism 3 presses the hanger 61 on the sofa iron frame 6 to prevent the hook 62 or the tension spring 63 from detaching from the hanger 61; when the fixing mechanism 3 is in a fixed state and the pushing mechanism 4 slides to the end of the sliding track 41, that is, the sliding track 41 is close to one end of the second fixing device 32, the controller controls the adjustment device to start, and the horizontal rod 53 rotates the hook-shaped portion 621 at the other end of the sofa iron frame 6 toward the tension spring 63, that is, rotates upward, to achieve the clamping connection between the tension spring 63 and the hook-shaped portion 621; the controller controls the fixing mechanism 3 to return to the non-fixed state again, and at the same time resets the adjustment mechanism 5 and the pushing mechanism 4 to the initial state. At this time, the tension spring 63 completes the assembly and retracts and tightens. The entire tension spring 63 process is highly automated. Through the cooperation of the controller and the switch key 73, precise control of each mechanism is achieved. The movement position and speed of each mechanism can be accurately adjusted by the controller to ensure that the tension spring 63 can be correctly connected to the sofa iron frame 6.

[0059] In summary, the automatic spring tensioning device and spring tensioning method for a sofa iron frame provided by the present invention have the following technical effects:

[0060] 1. The equipment can simultaneously process the assembly of one or more tension springs 63 on the sofa iron frame 6 through an automated process, without the need for manual operation one by one, which greatly shortens the production cycle, reduces the use of labor, and reduces the dependence on the number and skills of workers, thereby improving the overall production efficiency;

[0061] 2. Compared with manual operation, automated equipment can significantly reduce assembly errors caused by human error, improve the overall quality and stability of the sofa, and can accurately control the movement position and speed of each mechanism to ensure that the position and tension of the tension spring 63 during the assembly process are in the optimal state;

[0062] 3. It has a certain versatility and can adapt to sofa iron frames 6 of different models and specifications, which improves the flexibility of production. The various mechanisms of the equipment are easy to replace, adjust and maintain, which is convenient for rapid adjustment and optimization according to production needs.

[0063] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. An automatic spring tensioning device for sofa iron frame, characterized in that: include: Operation table (1); A support mechanism (2), the support mechanism (2) being mounted on the operating table (1) and used for supporting a sofa iron frame (6) having a tension spring (63), one end of the tension spring (63) being connected to one end of the sofa iron frame (6); A fixing mechanism (3), the fixing mechanism (3) being mounted on the operating table (1) and being used to keep the sofa iron frame (6) and the operating table (1) relatively fixed; A pushing mechanism (4), the pushing mechanism (4) is slidably mounted on the operating table (1), and the pushing mechanism (4) is used to push the other end of the tension spring (63) to move toward the other end of the sofa iron frame (6), so that the other end of the tension spring (63) is overlapped at the opening of the hook-shaped portion (621) at the other end of the sofa iron frame (6); An adjusting mechanism (5), wherein the adjusting mechanism (5) is used to adjust the rotation of the hook-shaped portion (621) so as to connect the other end of the tension spring (63) with the hook-shaped portion (621).

2. The automatic spring tensioning device for sofa iron frame according to claim 1 is characterized in that: The pushing mechanism (4) comprises: A sliding track (41), wherein the sliding track (41) is arranged on the operating table (1); A pushing plate (42), the pushing plate (42) comprising an assembly surface (421) and a pushing surface (422), the pushing surface (422) being provided with a clamping groove (4221), the other end of the tension spring (63) being provided with a stepped clamping portion (631) corresponding to the clamping groove (4221), the clamping portion (631) being clamped in the clamping groove (4221); A pushing electric cylinder (43) is mounted on the operating table (1), and an output end of the pushing electric cylinder (43) is connected to a mounting surface (421) of a pushing plate (42) so as to push the pushing plate (42) to slide along the sliding track (41).

3. The automatic spring tensioning device for sofa iron frame according to claim 2 is characterized in that: At least two sliding rails (41) are provided, the length direction of the pushing plate (42) is perpendicular to the sliding rails (41), and a sliding seat (46) is provided between the pushing plate (42) and each sliding rail (41).

4. The automatic spring tensioning device for sofa iron frame according to claim 1 is characterized in that: The support mechanism (2) comprises a plurality of support clamps (21), and the support clamps (21) comprise: A card assembly portion (211), the card assembly portion (211) being detachably connected to the operating table (1); A step card platform (212), the step card platform (212) comprising a first supporting surface (2121) and a second abutting surface (2122), the first supporting surface (2121) abutting against the bottom surface of the sofa iron frame (6), and the second abutting surface (2122) abutting against the inner side or the outer side of the sofa iron frame (6); Wherein, a plurality of the supporting clips (21) are arranged around the edge of the sofa iron frame (6).

5. The automatic spring tensioning device for sofa iron frame according to claim 1 is characterized in that: The fixing mechanism (3) comprises a first fixing device (31) located at one end of the sofa iron frame (6) and / or a second fixing device (32) located at the other end of the sofa iron frame (6).

6. The automatic spring tensioning device for sofa iron frame according to claim 5 is characterized in that: The first fixing device (31) and / or the second fixing device (32) comprises: A connecting pile (33), the connecting pile (33) is mounted on the operating table (1), and a rotating shaft hole (331) is provided on the connecting pile (33); A rotating member (34), one end of which is provided with a pressing plate (39), and the pressing plate (39) provides a force for the sofa iron frame (6) to prevent it from moving away from the operating table (1); A rotating shaft rod (35), the rotating shaft rod (35) is passed through the middle of the rotating member (34), and the two ends are respectively rotatably connected to a rotating shaft hole (331) of the connecting pile (33); A traction rod (36), wherein the traction rod (36) is connected to the other end of the rotating member (34); A driving member (37), the driving member (37) is mounted on the operating table (1), the output end of the driving member (37) is rotationally connected to the traction rod (36), and the driving member (37) is used to drive the rotating member (34) to rotate around the rotating shaft rod (35).

7. The automatic spring tensioning device for sofa iron frame according to claim 6 is characterized in that: The quantitative relationship between the pressing plate (39) and the rotating member (34) is 1:N, N≥1; The quantitative relationship between the traction rod (36) and the rotating member (34) is 1:N, N≥1; The number of the connection piles (33) is N+1.

8. The automatic spring tensioning device for sofa iron frame according to claim 1 is characterized in that: The regulating mechanism (5) comprises: An adjusting electric cylinder (51), wherein the adjusting electric cylinder (51) is mounted on the operating table (1). A bracket (52), the bracket (52) being connected to the output end of the adjusting electric cylinder (51) to achieve its own lifting in the vertical direction, and the bracket (52) being provided with an inwardly concave bracket groove (521); A horizontal rod (53), the horizontal rod (53) is assembled in the bracket (521), and the top surface of the horizontal rod (53) abuts against the bottom of the hook-shaped portion (621).

9. The automatic spring tensioning device for sofa iron frame according to claim 1, characterized in that: It also comprises a controller and a switch key (73), wherein the switch key (73) is arranged on one side of the operating table (1) and is used to control the start and stop of the supporting mechanism (2), the fixing mechanism (3), the pushing mechanism (4) and the adjusting mechanism (5).

10. A spring tensioning method for an automatic spring tensioning device for a sofa iron frame, characterized in that: The automatic spring tensioning device for a sofa iron frame according to any one of claims 1 to 9 is used, and the steps are as follows: Using a controller to set the fixing mechanism (3) to a non-fixed state, and at the same time adjusting the adjustment mechanism (5) and the pushing mechanism (4) to an initial state; Place the sofa iron frame (6) on the supporting mechanism (2), and ensure that one end of the sofa iron frame (6) is connected to one end of the tension spring (63); Adjusting the position of the pushing mechanism (4) on the operating table (1) so that the other end of the tension spring (63) is in contact with the supporting mechanism (2); When the switch key (73) is triggered, the controller immediately controls the pushing mechanism (4) to move, driving the other end of the tension spring (63) to extend toward the other end of the sofa iron frame (6), and at the same time, the fixing mechanism (3) is synchronously started to fix the sofa iron frame (6); When the fixing mechanism (3) is in a fixed state and the pushing mechanism (4) slides to the end, the controller controls the adjusting device to start, and the hook-shaped portion (621) at the other end of the sofa iron frame (6) is rotated in the direction of the tension spring (63), so as to realize the clamping connection between the tension spring (63) and the hook-shaped portion (621); The controller controls the fixing mechanism (3) to return to the non-fixed state again, and simultaneously resets the adjustment mechanism (5) and the pushing mechanism (4) to the initial state.

Images