A device for automatic webbing seat back tautening

Abstract

The application discloses a device for automatic stretching of a seat net back, comprising a workbench, a fixing mechanism for fixing a chair back, an X-axis stretching mechanism for processing the top of the chair back, and a Y-axis stretching mechanism for processing the two sides of the chair back, the X-axis stretching mechanism comprising a bending and pressing block for bending and pressing the net back, and a first power assembly for driving the bending and pressing block to move, the bending and pressing block being provided with a groove opening towards the fixing mechanism, and the Y-axis stretching mechanism comprising a first pressing roller and a second power assembly for driving the first pressing roller to move. The first power assembly drives the bending and pressing block to move, so that the edge of the top of the chair back is located in the groove, the first power assembly drives the bending and pressing block to be attached to the net cloth on the upper side of the chair back and to move and rotate from top to bottom, so as to achieve the effect of manually stretching and bending and pressing the net cloth, and the first pressing roller is used for pressing the adhesive tape into the gap of the edge of the chair back, so as to realize the automatic stretching of the net cloth of the chair back.

Description

Technical Field

[0001] The invention relates to the technical field of seat back mesh installation, in particular to a device for automatically mounting a seat back mesh. Background Art

[0002] Mesh chairs are usually used in office places. When manufacturing a mesh chair, you only need to make a layer of mesh on the backrest according to the shape of the backrest, and press the edge rubber strip into the gap of the outer frame of the backrest to complete the manufacture of a chair back.

[0003] Currently, attaching the mesh to the chair back is mostly done manually. Because the mesh is initially similar in size to the chair back, the mesh needs to be stretched to fully attach before it can be fastened. Repeated fastening can cause pain in the worker's hands, making it difficult to continue working.

[0004] In the prior art, the mesh cloth on the top of the chair back is fastened by moving a fastening roller along the boundary of the top of the chair back, and the overall fastening of the mesh cloth is achieved with the cooperation of a tension spring.

[0005] However, the prior art only uses a pressing roller to press the rubber strip into the gap at the edge of the chair back, and cannot stretch and flatten the mesh. Workers also need to flatten the mesh before starting the pressing equipment and align the rubber strip with the gap at the edge of the chair back. Summary of the Invention

[0006] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a device for automatically stretching the seat mesh back, which can stretch and flatten the mesh cloth, avoiding the workers from flattening the mesh cloth and aligning the rubber strips before starting the stretching device.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A device for automatically controlling a seat mesh back comprises a workbench on which is provided a fixing mechanism for fixing the seat back, an X-axis controlling mechanism for processing the top of the seat back, and a Y-axis controlling mechanism for processing both sides of the seat back. The X-axis controlling mechanism comprises a folding block for bending and pressing down the mesh back, and a first power assembly for driving the folding block to move. The folding block is provided with a groove opening toward the fixing mechanism. The Y-axis controlling mechanism comprises a first pressing roller and a second power assembly for driving the first pressing roller to move.

[0009] Compared with the prior art, the application has the beneficial effects that the chair back is fixed on the fixing mechanism, the net cloth is laid on the chair back, the folding pressing block is driven to move by the first power assembly, the top edge of the chair back is located in the groove, the folding pressing block is driven to stick to the net cloth on the upper side of the chair back and move and rotate from top to bottom, the effect of manually stretching and folding the net cloth is achieved, and the adhesive tape is pressed into the gap of the edge of the chair back by the first pressing roller, so that the automatic pressing of the chair back net cloth is realized.

[0010] Preferably, the first power assembly comprises an X-axis sliding box slidably connected along the X-axis direction of the workbench, a folding pressing block rotating plate connected with the folding pressing block through universal wheels, a plurality of first sliding rods fixedly arranged on the folding pressing block rotating plate, a folding pressing block movable plate slidably connected with the plurality of first sliding rods, a first compression spring sleeved on the first sliding rod, and a first tension spring and a second tension spring, both stress ends of the first tension spring are fixedly arranged on the upper side of the folding pressing block and the upper side of the folding pressing block rotating plate respectively, both stress ends of the second tension spring are fixedly arranged on the lower side of the folding pressing block and the lower side of the folding pressing block rotating plate respectively, the X-axis sliding box is provided with a folding pressing block translation driving piece for driving the folding pressing block movable plate to approach / away from the fixing mechanism, and the X-axis sliding box is provided with a folding pressing block lifting driving piece for driving the folding pressing block movable plate to lift.

[0011] Preferably, the X-axis pressing mechanism further comprises a second pressing roller, and the second pressing roller is located on one side of the folding pressing block.

[0012] Preferably, the first power assembly further comprises a second rotating shell rotationally connected with the second pressing roller, a second pressing roller hinged plate hinged with the second rotating shell, a plurality of second sliding rods fixedly arranged on the second pressing roller hinged plate, a second pressing roller movable plate slidably connected with the plurality of second sliding rods, a second compression spring sleeved on the second sliding rod, and a third tension spring, both stress ends of the third tension spring are fixedly arranged on the second rotating shell and the second pressing roller hinged plate respectively, and the X-axis sliding box is provided with a second pressing roller driving piece for driving the second pressing roller to approach / away from the fixing mechanism.

[0013] Preferably, two V-shaped inclined surfaces are arranged in the groove, and the two V-shaped inclined surfaces are open to the fixing mechanism.

[0014] Preferably, the second power assembly includes a Y-axis slide box slidingly connected along the Y-axis direction of the workbench, a first rotating shell rotatably connected to the first pressure roller, a first pressure roller hinge plate hinged to the first rotating shell, a plurality of third slide bars fixed on the first pressure roller hinge plate, a third pressure roller movable plate slidably connected to the plurality of third slide bars, a third compression spring sleeved on the third slide bar, and a fourth tension spring, the two force-bearing ends of the fourth tension spring are respectively fixed on the first rotating shell and the first pressure roller hinge plate, the Y-axis slide box is provided with a first pressure roller translation drive component for driving the first pressure roller to approach / move away from the fixing mechanism, and the Y-axis slide box is provided with a first pressure roller lifting drive component for driving the first pressure roller to rise and fall.

[0015] Preferably, the second power assembly also includes a Y-axis drive motor fixed on the workbench, a Y-axis screw threadedly connected to the Y-axis slide box, and a mechanical transmission assembly, the input end of the mechanical transmission assembly is fixedly connected to the output end of the Y-axis drive motor, and the output end of the mechanical transmission assembly is fixedly connected to the Y-axis screw.

[0016] Preferably, the fixing mechanism includes a downward pressing servo motor and a downward pressing member for pressing the chair back, and the downward pressing member is fixed to the output end of the downward pressing servo motor.

[0017] Preferably, the fixing mechanism also includes a plurality of columns for supporting the chair back, a plurality of first positioning rods abutting the top inner wall of the chair back, a plurality of second positioning rods abutting the two side inner walls of the chair back, and a plurality of third positioning rods abutting the bottom inner wall of the chair back.

[0018] Preferably, the top surface of the workbench is tilted, and the fixing mechanism, X-axis control mechanism and two Y-axis control mechanisms are respectively arranged on the workbench, and the fixing mechanism is located on the upper side of the X-axis control mechanism, and the two Y-axis control mechanisms are respectively located on both sides of the fixing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 Schematic diagram of the structure of the X-axis control mechanism of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the X-axis control mechanism of the present invention;

[0022] Figure 4 Schematic diagram of the partial structure of the pressing roller portion of the X-axis control mechanism of the present invention;

[0023] Figure 5 for Figure 4 A partial enlarged view of point “A”;

[0024] Figure 6 Schematic diagram of the partial structure of the folding and pressing part of the X-axis control mechanism of the present invention;

[0025] Figure 7 It is a side sectional view of the folding block of the present invention;

[0026] Figure 8 Schematic diagram of the structure of the Y-axis control mechanism of the present invention;

[0027] Figure 9 Schematic diagram of the internal structure of the Y-axis control mechanism of the present invention;

[0028] Figure 10 for Figure 9 A partial enlarged view of point “B”;

[0029] Figure 11 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0030] Figure 12 for Figure 11 A partial enlarged view of point “C”;

[0031] In the picture:

[0032] 1. Workbench; 2. X-axis control mechanism; 20. X-axis slide; 21. Folding block; 21a. Groove; 21b. Inclined surface; 21c. Bottom surface; 21d. Flat surface; 21e. Chamfer; 210. First slide rail; 211. Folding block translation driver; 212. First slide plate; 2120. Third slide rail; 213. Folding block lifting driver; 214. Folding block movable plate; 215. Folding block Rotating plate; 216, first tension spring; 217, second tension spring; 218, first slide bar; 219, first compression spring; 22, second pressure roller; 220, second slide rail; 221, second pressure roller driving member; 222, second pressure roller movable plate; 223, second pressure roller hinge plate; 224, third tension spring; 225, second slide bar; 226, second compression spring; 23, X-axis drive motor; 231, X-axis screw; 232. X-axis transmission assembly; 233. X-axis slide rail; 24. First dust cover; 3. Y-axis control mechanism; 30. Y-axis slide box; 31. First pressure roller; 311. First pressure roller translation drive member; 312. Second slide plate; 3120. Fourth slide rail; 313. First pressure roller lifting drive member; 314. Third pressure roller movable plate; 315. First pressure roller hinge plate; 316. Fourth tension spring; 317. Third slide bar; 318. Third compression spring; 32. Y-axis drive motor; 321. Y-axis screw; 322. Mechanical transmission assembly; 323. Y-axis slide rail; 33. Second dust cover; 4. Fixing mechanism; 41. First positioning rod; 42. Post; 43. Second positioning rod; 45. Third positioning rod; 46. Down-pressing servo motor; 47. Down-pressing member; 471. Clamping block; 5. Chair back; 51. Crossbar. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] See also Figure 1 This embodiment provides a device for automatically controlling a seat mesh backrest, comprising a workbench 1. The top surface of the workbench 1 is tilted, and a 36° tilted workbench surface provides a better control effect. The top surface of the workbench 1 is tilted along the Y-axis direction. A fixing mechanism 4, an X-axis control mechanism 2, and two Y-axis control mechanisms 3 are provided on the top surface of the workbench 1. The fixing mechanism 4 fixes the chair back 5 horizontally in the X-axis direction, and the top in the Y-axis direction is located below the bottom (fixing the chair back 5 tilted downward). The fixing mechanism 4 is located obliquely above the X-axis control mechanism 2 (the upper side in the Y-axis direction; the X-axis control mechanism 2 is used to control the top of the chair back 5). The two Y-axis control mechanisms 3 are located on either side of the fixing mechanism 4, respectively, for controlling the two sides of the chair back 5.

[0035] See also Figure 2-Figure 7 In this embodiment, the X-axis control mechanism 2 includes a folding block 21 for bending and pressing the back of the mesh, a second pressing roller 22 (located on the rear side of the folding block 21 in the X-axis moving direction), and a first power assembly for driving the folding block 21 to move. The first power assembly includes an X-axis driving motor 23 fixed on the top surface of the workbench 1, an X-axis slide rail 233 fixed on the top surface of the workbench 1, an X-axis slide box 20 slidably connected to the X-axis slide rail 233, an X-axis screw 231 threadedly connected to the X-axis slide box 20, an X-axis transmission assembly 232, a first slide rail 210 and a second slide rail 220 fixed on the X-axis slide box 20, a first slide plate 212 slidably connected to the first slide rail 210, a third slide rail 2120 fixed on the first slide plate 212, a folding block movable plate 214 slidably connected to the third slide rail 2120, and a second pressing roller movable plate 222 slidably connected to the second slide rail 220. The X-axis slide box 20 is fixedly provided with a folding block translation driving component 211 for driving the first slide plate 212 to approach / move away from the fixing mechanism 4, the first slide plate 212 is provided with a folding block lifting driving component 213 for driving the folding block movable plate 214 to rise and fall, and the X-axis slide box 20 is fixedly provided with a second pressing roller driving component 221 for the second pressing roller movable plate 222 to approach / move away from the fixing mechanism 4.

[0036] The X-axis transmission assembly 232 is a pulley pair or a gear pair, and the input end of the X-axis transmission assembly 232 is fixedly connected to the output end of the X-axis drive motor 23, and the output end of the X-axis transmission assembly 232 is fixedly connected to the X-axis screw 231. The X-axis slide box 20 can also be manually pushed to slide along the X-axis direction on the workbench 1.

[0037] Further explanation: the first power assembly also includes a folding block rotating plate 215 connected to the folding block 21 through a universal wheel, a plurality of first sliding rods 218 fixed on the folding block rotating plate 215, a first compression spring 219 slidably connected to the plurality of first sliding rods 218 and sleeved on the first sliding rod 218, a first tension spring 216 and a second tension spring 217, the folding block 21 is provided with a groove 21a opening to the fixing mechanism 4, the two force-bearing ends of the first tension spring 216 are respectively fixed on the upper side of the folding block 21 and the upper side of the folding block rotating plate 215, and the two force-bearing ends of the second tension spring 217 are respectively fixed on the lower side of the folding block 21 and the lower side of the folding block rotating plate 215.

[0038] The first power assembly also includes a second rotating shell rotatably connected to the second pressure roller 22, a second pressure roller hinge plate 223 hinged to the second rotating shell, a plurality of second slide bars 225 fixed on the second pressure roller hinge plate 223, a second pressure roller movable plate 222 slidingly connected to the plurality of second slide bars 225, a second compression spring 226 sleeved on the second slide bar 225, and a third tension spring 224, the two force-bearing ends of the third tension spring 224 are respectively fixed on the second rotating shell and the second pressure roller hinge plate 223, and the X-axis slide box 20 is provided with a second pressure roller driving component 221 for driving the second pressure roller 22 to approach / move away from the fixing mechanism 4.

[0039] A first dust cover 24 is provided on both sides of the X-axis slide box 20 . The end of the first dust cover 24 away from the X-axis slide box 20 is fixed on the workbench 1 . The first dust cover 24 is a retractable structure.

[0040] The folding block translation driving member 211 , the folding block lifting driving member 213 , and the second pressing roller driving member 221 are electric push rods.

[0041] The X-axis drive motor 23 and the X-axis transmission assembly 232 drive the X-axis screw 231 to rotate, so that the X-axis slide box 20 slides along the X-axis direction of the workbench 1 (the X-axis screw 231 and the X-axis slide rail 233 both extend along the X-axis direction), and the folding block 21 and the second pressure roller 22 are respectively driven to abut against the top of the chair back 5 by the folding block translation drive 211 and the second pressure roller 221. At the same time, the folding block lifting drive 213 drives the folding block 21 to rise and fall, so that the top edge of the chair back 5 is located in the groove 21a; through the joint action of the first compression spring 219, the first slide bar 218, the first tension spring 216 and the second tension spring 217, during the pressing process, the two sides of the mesh are always tightly attached to the chair back 5 and the inner wall of the groove 21a, and the folding block lifting drive 213 drives the folding block 21 to move from top to bottom, and the folding block 21 moves and rotates to achieve the stretching and flattening of the mesh. The second pressing roller 22 is then pushed to the top of the mesh by the second pressing roller driving member 221. Under the joint action of the third tension spring 224 and the second slide rod 225, the X-axis slide box 20 moves along the X-axis direction, pressing the top rubber strip into the groove of the top chair back 5, thereby achieving the control of the top of the chair back 5.

[0042] In order to improve the effect of stretching the mesh, the groove 21a of the folding block 21 includes a bottom surface 21c located in the center and horizontally arranged, inclined surfaces 21b located on the upper and lower sides of the bottom surface 21c, a plane 21d located on the inclined surface 21b close to the chair back 5, and a chamfer 21e located on the plane 21d close to the chair back 5, wherein the two inclined surfaces 21b are distributed in a V shape and the openings face the chair back 5, and the two planes 21d (especially the upper plane 21d) are used to imitate the shape of human hands grabbing a buckle, so as to facilitate stretching and flattening the mesh.

[0043] A second dust cover 33 is provided on both sides of the Y-axis slide box 30 . The end of the second dust cover 33 away from the Y-axis slide box 30 is fixed on the workbench 1 . The second dust cover 33 is a retractable structure.

[0044] See also Figure 8-10 In this embodiment, the Y-axis control mechanism 3 includes a first pressure roller 31 and a second power component for driving the first pressure roller 31 to move.

[0045] The second power assembly includes a Y-axis slide box 30 slidably connected along the Y-axis direction of the workbench 1, a second slide 312 slidably connected to the Y-axis slide box 30, a fourth slide rail 3120 fixed on the second slide rail 312, a third pressure roller movable plate 314 slidably connected to the fourth slide rail 3120, a first rotating shell rotatably connected to the first pressure roller 31, a first pressure roller hinge plate 315 hinged to the first rotating shell, and a plurality of third slide bars 317 (the third pressure roller movable plate 314) fixed on the first pressure roller hinge plate 315. 14 is slidably connected to the third slide bar 317), a third compression spring 318 is sleeved on the third slide bar 317, and a fourth tension spring 316 is mounted. The two force-bearing ends of the fourth tension spring 316 are respectively fixed to the first rotating housing and the first pressure roller hinge plate 315. The Y-axis slide box 30 is provided with a first pressure roller translation driver 311 for driving the third pressure roller movable plate 314 toward or away from the fixing mechanism 4. The Y-axis slide box 30 is also provided with a first pressure roller elevation driver 313 for driving the third pressure roller movable plate 314 to move upward or downward. The first pressure roller translation driver 311 and the first pressure roller elevation driver 313 are electric push rods.

[0046] Further explanation: the second power assembly also includes a Y-axis drive motor 32 fixedly mounted on the workbench 1, a Y-axis slide rail 323 fixedly mounted on the workbench 1 (the Y-axis slide box 30 is slidably connected to the Y-axis slide rail 323), a Y-axis screw 321 threadedly connected to the Y-axis slide box 30, and a mechanical transmission assembly 322. The input end of the mechanical transmission assembly 322 is fixedly connected to the output end of the Y-axis drive motor 32, and the output end of the mechanical transmission assembly 322 is fixedly connected to the Y-axis screw 321. The mechanical transmission assembly 322 is a pulley pair or a gear pair, and the input end of the mechanical transmission assembly 322 is fixedly connected to the output end of the Y-axis drive motor 32, and the output end of the mechanical transmission assembly 322 is fixedly connected to the Y-axis screw 321. The Y-axis slide box 30 can also be manually pushed to slide along the X-axis direction on the workbench 1. The Y-axis slide rail 323 and the Y-axis screw 321 slide along the Y-axis direction of the workbench 1 (i.e., slide along both sides of the chair back 5).

[0047] The Y-axis drive motor 32 and the mechanical transmission component 322 drive the Y-axis screw 321 to rotate, so that the Y-axis slide box 30 slides along the Y-axis direction; the first pressure roller translation driver 311 drives the third pressure roller movable plate 314 to approach the side of the chair back 5, and the third pressure roller movable plate 314 is raised and lowered by the first pressure roller lifting driver 313. The fourth tension spring 316, the third slide rod 317 and the third compression spring 318 work together to ensure that the first pressure roller 31 is always in close contact with the mesh. The cloth is also tightly attached to the side of the chair back 5. The fourth tension spring 316 is located on the upper side of the first pressure roller 31. The axial direction of the first pressure roller 31 is located in the vertical plane, and the axial direction of the first pressure roller 31 is tilted. The upper end of the first pressure roller 31 is close to the chair back 5. When the first pressure roller 31 is tightly attached, the fourth tension spring 316 is stretched and the third compression spring 318 is compressed, so that the first pressure roller 31 and the chair back 5 fit more closely (the installation angle and principle of the second pressure roller 22 are the same as those of the first pressure roller 31).

[0048] See also Figure 11 and Figure 12 In this embodiment, the fixing mechanism 4 includes a downward pressing servo motor 46 and a downward pressing member 47 for pressing the chair back 5, and the downward pressing member 47 is fixed to the output end of the downward pressing servo motor 46; the fixing mechanism 4 also includes a plurality of columns 42 for supporting the chair back 5, a plurality of first positioning rods 41 abutting against the top inner wall of the chair back 5, a plurality of second positioning rods 43 abutting against the inner walls on both sides of the chair back 5, and a plurality of third positioning rods 45 abutting against the bottom inner wall of the chair back 5. Place the chair back 5 on several pillars 42, and use the first positioning rod 41, the second positioning rod 43 and the third positioning rod 45 to stretch and fix the chair back 5 from the inside, and then use the downward pressure servo motor 46 to drive the downward pressure piece 47 to descend. The end of the downward pressure piece 47 is provided with a clamping block 471, and the clamping block 471 is made of a flexible material such as rubber, silicone, etc. The clamping block 471 is pressed on the cross bar 51 of the chair back 5 (the cross bar 51 is provided on the outer frame of the chair back 5) to press the chair back 5 down and fix it. The chair back 5 does not contact the workbench 1, and the top of the chair back 5 is located obliquely below the bottom.

[0049] The present invention solves the problem of high manpower consumption in tightening and inserting the rubber edges during manual stretching, reduces labor costs, and reduces manual operation procedures. It solves the problem of high labor intensity of workers using rubber hammers to hit the rubber edges during manual stretching, making the operation more convenient and improving efficiency. During manual installation, the degree of tension of the mesh varies due to the limitations of workers' operating experience and work level. The use of automatic mesh back stretching equipment can achieve a uniform mesh stretching effect and effectively guarantee quality. The use of the present invention for automatic stretching of the mesh back has a high safety factor and greatly reduces the risk of workers' fingers being injured during the stretching process. There is no need for manual alignment of the position, the stretching time is reduced, and the stretching efficiency is effectively improved.

[0050] It is worth noting that there is friction between the first pressing roller 31 , the second pressing roller 22 , the groove 21 a and the mesh, respectively, which can drive the mesh to move toward the edge of the chair back 5 .

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A device for automatically making a seat mesh back, comprising a workbench (1), characterized in that: The workbench (1) is provided with a fixing mechanism (4) for fixing the chair back (5), an X-axis control mechanism (2) for processing the top of the chair back (5), and a Y-axis control mechanism (3) for processing both sides of the chair back (5), the X-axis control mechanism (2) includes a folding block (21) for bending and pressing the mesh back, and a first power assembly for driving the folding block (21) to move, the folding block (21) is provided with a groove (21a) opening toward the fixing mechanism (4), and the Y-axis control mechanism (3) includes a first pressing roller (31) and a second power assembly for driving the first pressing roller (31) to move; The first power assembly comprises an X-axis slide box (20) slidably connected along the X-axis direction of the workbench (1), a folding block rotating plate (215) connected to the folding block (21) via a universal wheel, a plurality of first slide bars (218) fixed on the folding block rotating plate (215), a folding block movable plate (214) slidably connected to the plurality of first slide bars (218), a first compression spring (219) sleeved on the first slide bar (218), and a first tension spring (216) and a second tension spring (217), wherein the first tension spring (216) and the second tension spring (217) are both The two force-bearing ends are respectively fixed on the upper side of the folding block (21) and the upper side of the folding block rotating plate (215), and the two force-bearing ends of the second tension spring (217) are respectively fixed on the lower side of the folding block (21) and the lower side of the folding block rotating plate (215). The X-axis slide box (20) is provided with a folding block translation driving member (211) for driving the folding block movable plate (214) to approach / move away from the fixing mechanism (4), and the X-axis slide box (20) is provided with a folding block lifting driving member (213) for driving the folding block movable plate (214) to rise and fall.

2. The device for automatically controlling a seat net back according to claim 1, characterized in that: The X-axis control mechanism (2) further includes a second pressing roller (22), and the second pressing roller (22) is located on one side of the folding block (21).

3. The device for automatically making a seat net back according to claim 2, characterized in that: The first power assembly also includes a second rotating shell rotatably connected to the second pressure roller (22), a second pressure roller hinge plate (223) hinged to the second rotating shell, a plurality of second slide bars (225) fixed on the second pressure roller hinge plate (223), a second pressure roller movable plate (222) slidably connected to the plurality of second slide bars (225), a second compression spring (226) sleeved on the second slide bar (225), and a third tension spring (224), wherein the two force-bearing ends of the third tension spring (224) are respectively fixed on the second rotating shell and the second pressure roller hinge plate (223), and the X-axis slide box (20) is provided with a second pressure roller driving member (221) for driving the second pressure roller (22) to approach / move away from the fixing mechanism (4).

4. The device for automatically controlling a seat net back according to claim 1, characterized in that: Two V-shaped inclined surfaces (21b) are provided in the groove (21a), and the two V-shaped inclined surfaces (21b) open toward the fixing mechanism (4).

5. The device for automatically controlling a seat net back according to claim 1, characterized in that: The second power assembly includes a Y-axis slide box (30) slidably connected along the Y-axis direction of the workbench (1), a first rotating shell rotatably connected to the first pressure roller (31), a first pressure roller hinge plate (315) hinged to the first rotating shell, a plurality of third slide bars (317) fixed on the first pressure roller hinge plate (315), a third pressure roller movable plate (314) slidably connected to the plurality of third slide bars (317), a third compression spring (318) sleeved on the third slide bar (317), and a fourth tension spring (316), wherein the two force-bearing ends of the fourth tension spring (316) are respectively fixed on the first rotating shell and the first pressure roller hinge plate (315), the Y-axis slide box (30) is provided with a first pressure roller translation drive (311) for driving the first pressure roller (31) to approach / move away from the fixing mechanism (4), and the Y-axis slide box (30) is provided with a first pressure roller lifting drive (313) for driving the first pressure roller (31) to lift.

6. The device for automatically controlling a seat net back according to claim 5, characterized in that: The second power assembly further comprises a Y-axis drive motor (32) fixedly mounted on the workbench (1), a Y-axis screw (321) threadedly connected to the Y-axis slide box (30), and a mechanical transmission assembly (322), wherein the input end of the mechanical transmission assembly (322) is fixedly connected to the output end of the Y-axis drive motor (32), and the output end of the mechanical transmission assembly (322) is fixedly connected to the Y-axis screw (321).

7. The device for automatically shaping a seat net back according to claim 1, characterized in that: The fixing mechanism (4) comprises a downward pressing servo motor (46) and a downward pressing member (47) for pressing the chair back (5), wherein the downward pressing member (47) is fixedly arranged at the output end of the downward pressing servo motor (46).

8. The device for automatically controlling a seat net back according to claim 7, characterized in that: The fixing mechanism (4) further comprises a plurality of upright posts (42) for supporting the chair back (5), a plurality of first positioning rods (41) abutting against the top inner wall of the chair back (5), a plurality of second positioning rods (43) abutting against the inner walls on both sides of the chair back (5), and a plurality of third positioning rods (45) abutting against the bottom inner wall of the chair back (5).

9. The device for automatically controlling a seat net back according to claim 1, characterized in that: The top surface of the workbench (1) is arranged at an angle, and the fixing mechanism (4), the X-axis control mechanism (2) and the two Y-axis control mechanisms (3) are respectively arranged on the workbench (1), and the fixing mechanism (4) is located on the upper side of the X-axis control mechanism (2), and the two Y-axis control mechanisms (3) are respectively located on both sides of the fixing mechanism (4).

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