CN112497408B - Automatic production method of sofa seat frame - Google Patents

Abstract

The invention relates to an automatic production method of a sofa seat frame, which comprises the following steps of buckle feeding, wherein a buckle opening faces inwards and is abutted against a material baffle plate; the serpentine spring is fed, and falls onto the rotating plate from the serpentine spring feeding box and is limited by the limiting block; the buckle is fixed with the serpentine spring, and the limiting block drives the serpentine spring to move transversely in a reciprocating manner in the serpentine spring conveying process and is matched with the adjusting assembly and the pressing assembly to enable the opening of the buckle to face outwards to be fixed with the serpentine spring; conveying the sofa seat frame, and moving the grabbing assembly carrying the sofa seat frame to the position right below the steel nail gun assembly; mounting a snake spring, and driving a steel nail gun component to move downwards by a lifting device to bind the buckle and the sofa seat frame; mounting an acorn strip; the sofa seat frame is discharged, the sofa seat frame is positioned in the discharging area, and the synchronous component rotates to enable the receiving component to move downwards to receive the sofa seat frame; when the sofa seat frame is fed, the synchronous assembly rotates to enable the bearing assembly in the feeding area to move upwards to convey the sofa frame into the grabbing assembly.

Description

Automatic production method of sofa seat frame

Technical Field

The invention relates to the technical field of furniture production, in particular to an automatic production method of a sofa seat frame.

Background

The sofa is a multi-seat chair with soft cushion, the back-rest chair with spring or thick foamed plastic, etc. and the two sides have armrests, and is one kind of soft furniture.

The invention patent with Chinese patent application number CN201910022055.5 discloses a single piece flow line for fixing a sofa, which comprises a material preparation area at the head of a line body, an assembly area at the middle part of the line body and an inspection and packaging area at the tail of the line body; the assembling area is sequentially provided with a station 1 for opening a wooden frame of a sofa armrest, a station 2 for assembling the wooden frame of the sofa armrest, a station 3 for opening a wooden frame of a sofa seat and assembling the wooden frame of the sofa seat, a station 4 for spraying glue or sticking cotton to the sofa, a station 5 for placing a sofa cushion, a station 6 for opening the front of the sofa seat, a station 12 for opening a wooden frame of a backrest of the sofa, a station 7 for opening a bag of the sofa cushion, a station 8 for opening left and right armrests of the sofa, and a station 9 for opening the back of the sofa seat and base cloth. The sofa is produced, transported and stored from the parts to the finished product in one line, and compared with batch production, the sofa shortens the production period, improves the product quality, reduces the transportation consumption and reduces the production cost.

However, the equipment only assembles each part of the sofa, but the production steps of a single workpiece are complicated, and the installation operation is mostly required manually at present due to the production efficiency of the whole streamline, such as the installation and fixation of the sofa seat frame and the serpentine spring.

Disclosure of Invention

Aiming at the problems, the invention provides an automatic production method of a sofa seat frame, which comprises the steps of firstly respectively conveying a serpentine spring and the sofa seat frame to the lower part of a steel nail gun assembly through a rotating plate and a grabbing assembly, then binding the serpentine spring and the sofa seat frame together through the steel nail gun assembly, and fixing the serpentine spring and a buckle through a transverse moving assembly adjusting assembly and a pressing assembly in the conveying process of the serpentine spring; in the process of conveying the sofa seat frame, the finished product blanking area forms a blanking space through the matching action of the synchronous assembly and the receiving assembly, the feeding preparation is completed in the seat frame raw material feeding area, and the orderly discharging of the seat frame raw materials and the orderly stacking of finished products are realized when the steel nail gun assembly moves down to complete the fixation of the coil spring and the sofa seat frame, so that the production efficiency of the sofa seat frame is greatly improved.

In order to achieve the purpose, the invention provides the following technical scheme:

an automatic production method of a sofa seat frame comprises the following steps:

the method comprises the following steps: feeding a buckle, and placing the buckle opening inwards on the moving block and abutting against the striker plate by the mechanical arm;

step two: feeding the serpentine springs, wherein after the first step, the moving block drives the rotating plate to move to the position right below the serpentine spring feeding box, and under the action of the transverse moving assembly, the limiting assembly moves to enable one serpentine spring to fall onto the rotating plate and be limited by the two groups of limiting blocks;

step three: the buckle is fixed with the serpentine spring, after the second step, the rotating plates leave the serpentine spring feeding box, the two groups of limiting blocks drive the serpentine spring to move transversely in a reciprocating mode to enable two ends of the serpentine spring to be clamped with the buckle, the adjusting assembly drives the opening of the buckle to face outwards in the process of moving transversely of the serpentine spring, then the pressing assembly rotates to press the buckle to enable the buckle and the serpentine spring to be fixed, and then the plurality of groups of rotating plates move to be right below the steel nail gun assembly;

step four: conveying the sofa seat frame, wherein the conveying assembly rotates simultaneously with the step three, and the grabbing assembly carries the sofa seat frame to be processed to move to the position right below the steel nail gun assembly;

step five: mounting a serpentine spring, wherein after the fourth step, the lifting device drives the steel nail gun assembly to move downwards, the pressing plate pushes a plurality of groups of moving blocks to move downwards simultaneously, then a plurality of groups of rotating plates rotate 180 degrees synchronously, so that a buckle and the serpentine spring are in contact with a sofa seat frame, and then the steel nail gun assembly binds the buckle and the sofa seat frame;

step six: mounting the rubber bands, namely moving the sofa seat frame bound with the serpentine springs under the action of the conveying assembly to a position right facing the band attaching equipment to mount the rubber bands after the fifth step;

step seven: discharging the sofa seat frame, wherein after the sixth step, the conveying assembly rotates, the sofa seat frame is conveyed into a blanking area along with the grabbing assembly, the synchronous assembly synchronously rotates to enable the grabbing assembly and the receiving assembly which are positioned at the blanking area to form a material receiving space, then the grabbing assembly loosens the fixation of the sofa seat frame, and the sofa seat frame can smoothly fall down;

step eight: and after the seventh step, the conveying assembly rotates, the grabbing assembly moves to the feeding area, and the synchronous assembly synchronously rotates to enable the receiving assembly in the feeding area to drive the sofa seat frame to move to the grabbing position to wait for being grabbed.

As an improvement, in the first step and the second step, the rotating plate and the material baffle plate are provided with magnetism, so that the fixation of the snake spring and the buckle is facilitated.

As an improvement, in the second step, only when the rotating plate is located right below the serpentine spring feeding box, the limiting component loosens the constraint on the lowest serpentine spring of the serpentine spring feeding box, so that the lowest serpentine spring falls onto the rotating plate, and the thickness between the upper surface of the rotating plate and the serpentine spring feeding box is consistent with the diameter of the serpentine spring, so that the serpentine spring feeding box can be discharged in order, and only one serpentine spring is carried when the rotating plate leaves the serpentine spring feeding box.

As an improvement, in the third step, the guide rod moves along the guide grooves arranged in the wave shape to drive the two groups of limiting blocks and the serpentine springs to move transversely, the serpentine springs are matched with the material blocking plates to complete clamping of the ends of the serpentine springs and the buckles when moving to the limit positions in one direction, then in the process that the limiting blocks and the serpentine springs move back to the limit positions at the other end, the supporting plate rotates firstly to enable the openings of the buckles to rotate 180 degrees, then the supporting plate stops rotating, and the right-angle plates at the ends of the supporting plate rotate to press the openings of the buckles so that the buckles and the serpentine springs are fixed; the serpentine spring moves back and forth until the two ends of the serpentine spring are fixed with buckles.

As an improvement, in the fifth step, the moving block and the conveying assembly stop conveying, the moving block rotates under the action of a gear and rack transmission mechanism when moving downwards, and when the pressing plate and the rotating plate move to the limit positions, the steel nail gun assembly moves downwards to fix the buckle and the sofa seat frame.

As an improvement, in the fifth step to the eighth step, a plurality of groups of the grabbing assemblies are arranged on the conveying assembly, each rotation of the conveying assembly enables different grabbing assemblies to move to corresponding stations, namely when the conveying assembly stops moving, the sofa seat frame and the grabbing assemblies for fixing the sofa seat frame are always subjected to corresponding processes in the feeding area, the steel nail gun assembly, the strip attaching equipment and the blanking area.

As an improvement, in the seventh step and the eighth step, the steel nail gun assembly moves downwards, and the two groups of racks e simultaneously contact with the corresponding gears e, so that the two corresponding groups of clamping plates are driven to loosen or clamp the sofa seat frame.

As a modification, in the seventh step and the eighth step, the rack e is meshed with the gear e which is positioned in the blanking area and arranged on the front side of the mounting plate along the conveying direction of the conveying assembly, so that two groups of clamping plates are driven to be away from each other and the fixation of the sofa seat frame is released; the other rack e is meshed with the gear e which is positioned in the feeding area and arranged on the rear side of the mounting plate along the conveying direction of the conveying assembly, so that the two groups of clamping plates are driven to mutually approach and clamp and fix the sofa seat frame.

As an improvement, in the seventh step and the eighth step, the bidirectional screw b and the bidirectional screw c rotate alternately, and when the bidirectional screw b rotates, the bearing plate is driven to move up and down, and meanwhile, the rotating cylinder and the bearing plate are driven to rotate correspondingly, so that the effect is achieved; when the bidirectional screw rod c rotates, only the rotating cylinder and the bearing plate are driven to rotate correspondingly.

As an improved generation, in the seventh step and the eighth step, when the two sets of the receiving assemblies move, the gear h and the rack unit are matched to drive the worm and gear transmission assembly to rotate, so that the missing teeth arranged in a staggered manner in the two sets of the teeth parts are driven to rotate, and under the interference effect of the square block and the triangular block, the receiving plate rotates 90 degrees along with the rotating cylinder and independently rotates 180 degrees, and the two rotation modes are performed at intervals.

The invention has the beneficial effects that:

(1) in the seventh step and the eighth step, the carrying plate can move up and down to stack finished materials in a layered mode, the sofa frames can be placed in a left-right switching mode in the blanking area under the action of the synchronizing assembly and the power assembly, then finished materials stacked in a staggered mode are formed, automatic stacking of the finished materials is achieved, and meanwhile material stacks formed by stacking are made to be more stable;

(2) in the seventh step and the eighth step, the seat frame raw materials which are stacked in a staggered mode can be orderly fed in the feeding area, the movement of a material pile is more stable during feeding, the positioning accuracy of the seat frame raw materials is improved, and the quality of the seat frame of the sofa can be improved;

(3) in the fifth step, the seventh step and the eighth step, the two groups of racks e move downwards along with the steel nail gun assembly to simultaneously complete binding of the serpentine springs, feeding and fixing of the seat frame raw materials and discharging and stacking of the seat frame finished products, so that the production efficiency of the sofa seat frame is greatly improved;

(4) in the third step, one end of the serpentine spring is firstly clamped with the buckle under the action of the transverse moving assembly, then the transverse moving assembly drives the other end of the serpentine spring to be clamped with the buckle, the serpentine spring is turned over for 180 degrees under the action of the clamped buckle supporting plate, then the supporting plate stops rotating, the right-angle plate rotates and is matched with the supporting plate to press the buckle, so that displacement cannot be generated between the serpentine spring and the buckle, and the serpentine spring is prevented from falling off when the sofa is used;

(5) in the third step to the fifth step, when the serpentine springs and the buckles move to the lower part of the pressing plate, under the action of the pressing plate, the rotating plate moves downwards, the buckles and the serpentine springs are pressed on the sofa seat frame, then the steel nail gun assembly fixes the buckles and the sofa seat frame, the speed of the conveying assembly for conveying the sofa seat frame and the advancing speed of the rotating plate are kept constant, the spacing of the serpentine springs arranged on the sofa seat frame can be effectively ensured to be constant, and the quality of the sofa seat frame is improved;

in conclusion, the invention has the advantages of simple structure, ingenious design, high installation efficiency of the serpentine spring, good installation effect of the serpentine spring and the like, and is particularly suitable for producing the sofa seat frame.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view of FIG. 2 at B;

FIG. 5 is an exploded view of the moving assembly;

FIG. 6 is a schematic view of the internal structure of the serpentine spring feeding box;

FIG. 7 is a schematic view of the operation of the position limiting assembly;

FIG. 8 is a schematic view of the traversing assembly;

FIG. 9 is a schematic view of the adjustment assembly;

FIG. 10 is a schematic view of the pressing assembly;

FIG. 11 is a schematic view of a binding state;

FIG. 12 is a schematic view of the structure of the gripping device and the stacking device;

FIG. 13 is a schematic structural diagram of a driving unit;

FIG. 14 is a schematic view of the internal structure of the mounting plate;

FIG. 15 is a schematic view of a grasping assembly;

FIG. 16 is a schematic view of a ratchet assembly;

FIG. 17 is a first drawing illustrating the structure of the receiving assembly;

FIG. 18 is a second drawing illustrating the structure of the receiving assembly;

FIG. 19 is an enlarged view at C of FIG. 17;

FIG. 20 is an enlarged view at D of FIG. 18;

FIG. 21 is an enlarged view at E of FIG. 18;

FIG. 22 is a diagram of a synchronization module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The first embodiment is as follows:

as shown in fig. 1, an automatic production method of a sofa seat frame includes the following steps:

the method comprises the following steps: feeding buckles, and placing the openings of the buckles inwards on the moving block 121 and abutting against the striker plate 32 by the mechanical arm;

step two: after the first step, the moving block 121 drives the rotating plate 122 to move to a position right below the serpentine spring feeding box 31, and under the action of the traverse moving assembly 21, the limiting assembly 33 moves, so that one serpentine spring falls on the rotating plate 122 and is limited by the two sets of limiting blocks 212;

step three: the buckles are fixed with the serpentine springs, after the second step, the rotating plates 122 leave the serpentine spring feeding box 31, the two groups of limiting blocks 212 drive the serpentine springs to move in a reciprocating mode to enable the two ends of the serpentine springs to be clamped with the buckles, the adjusting assemblies 23 drive the buckle openings to face outwards in the process of moving the serpentine springs in a traversing mode, then the pressing assemblies 24 rotate to press the buckles to enable the buckles to be fixed with the serpentine springs, and then the groups of rotating plates 122 move to be right below the steel nail gun assembly 42;

step four: conveying the sofa seat frame, wherein the conveying component 52 rotates simultaneously with the step three, and the grabbing component 53 carries the sofa seat frame to be processed to move to the position right below the steel nail gun component 42;

step five: mounting a serpentine spring, wherein after the fourth step, the lifting device 41 drives the steel nail gun assembly 42 to move downwards, the pressing plate 43 pushes a plurality of groups of moving blocks 121 to move downwards simultaneously, then a plurality of groups of rotating plates 122 rotate 180 degrees synchronously, so that a buckle and the serpentine spring are in contact with a sofa seat frame, and then the steel nail gun assembly 42 binds the buckle and the sofa seat frame;

step six: mounting the rubber bands, namely moving the sofa seat frame bound with the serpentine springs under the action of the conveying component 52 to be over against the strip attaching equipment 51 for mounting the rubber bands after the fifth step;

step seven: discharging the sofa seat frame, wherein after the sixth step, the conveying component 52 rotates, the sofa seat frame is conveyed into the blanking area 502 along with the grabbing component 53, and the synchronizing component 64 synchronously rotates to enable the grabbing component 53 positioned at the blanking area 502 to form a material receiving space with the receiving component 63, then the grabbing component 53 loosens the fixation of the sofa seat frame, and the sofa seat frame can smoothly fall down;

step eight: after the seventh step, the conveying assembly 52 rotates, the gripping assembly 53 moves to the loading area 501, and the synchronizing assembly 64 rotates synchronously, so that the receiving assembly 63 in the loading area 501 drives the sofa seat frame to move to a gripping position to be gripped.

Further, in the first step and the second step, the rotating plate 122 and the striker plate 32 are both provided with magnetism, which facilitates the fixation of the serpentine spring and the buckle.

Further, in the second step, only when the rotating plate 122 is located right below the serpentine spring feeding box 31, the limiting component 33 will release the constraint on the lowest serpentine spring of the serpentine spring feeding box 31, so that the lowest serpentine spring falls onto the rotating plate 122, and the thickness between the upper surface of the rotating plate 122 and the serpentine spring feeding box 31 is consistent with the diameter of the serpentine spring, so that the serpentine spring feeding box 31 can be discharged in order, and only one serpentine spring is carried when the rotating plate 122 leaves the serpentine spring feeding box 31.

Further, in the third step, the guide rod 213 moves along the guide groove 214 arranged in a wave shape to drive the two sets of the limit blocks 212 and the serpentine springs to move transversely, and the serpentine springs are matched with the baffle plate 32 to complete the clamping connection between the ends of the serpentine springs and the buckles when moving to the limit positions in one direction, then in the process that the limit blocks 212 and the serpentine springs move back to the limit positions at the other ends, the support plate 233 rotates first to enable the buckle openings to rotate 180 degrees, then the support plate 233 stops rotating, and the right-angle plate 241 at the end of the support plate 233 rotates to press the buckle openings, so that the buckles and the serpentine springs are fixed; the serpentine spring moves back and forth until the two ends of the serpentine spring are fixed with buckles

Further, in the fifth step, the moving block 121 and the conveying assembly 52 stop conveying, when the moving block 121 moves downward, the moving block rotates under the action of the rack and pinion transmission mechanism 128, and when the pressing plate 43 and the rotating plate 122 move to the extreme positions, the steel nail gun assembly 42 moves downward to fix the buckle with the sofa seat frame.

Further, in the fifth step to the eighth step, a plurality of groups of the grabbing assemblies 53 are arranged on the conveying assembly 52, each rotation of the conveying assembly 52 enables different grabbing assemblies 53 to move to corresponding stations, that is, when the conveying assembly 52 stops moving, the feeding area 501, the nail gun assembly 42, the strip attaching device 51 and the discharging area 502 always have sofa seats and grabbing assemblies 53 for fixing the sofa seats to be processed correspondingly.

Further, in the seventh step and the eighth step, the steel nail gun assembly 42 moves downwards and simultaneously drives the two corresponding clamping plates 533 to loosen or clamp the sofa seat frame through the two sets of racks e546 and the corresponding gears e 542.

Further, in the seventh step and the eighth step, the rack e546 is engaged with the gear e542 located in the blanking area 502 and disposed at the front side of the mounting plate 532 in the conveying direction of the conveying assembly 52, so as to drive the two sets of clamping plates 533 away from each other and release the fixation of the sofa seat frame; the other rack e546 is engaged with the gear e542 located in the loading area 501 and disposed behind the mounting plate 532 in the conveying direction of the conveying assembly 52, so as to drive the two sets of clamping plates 533 to approach each other and clamp and fix the sofa seat frame.

Further, in the seventh step and the eighth step, the bidirectional screw b621 and the bidirectional screw c646 rotate alternately, and when the bidirectional screw b621 rotates, the receiving plate 632 is driven to move up and down, and simultaneously the rotating cylinder 631 and the receiving plate 632 are driven to rotate correspondingly; when the bidirectional screw c646 rotates, only the rotary cylinder 631 and the receiving plate 632 are driven to rotate correspondingly.

Further, in the seventh step and the eighth step, when two sets of the receiving assemblies 63 move, the gear h638 and the rack unit 637 cooperate to drive the worm gear transmission assembly to rotate, so as to drive the missing teeth 636 with two sets of staggered teeth to rotate, and under the interference effect of the square block 639 and the triangular block 630, the receiving plate 632 rotates 90 ° along with the rotating cylinder 631 and the receiving plate 632 rotates 180 ° alone, and the two rotation modes are performed at intervals.

Example two:

the invention also provides an automatic production system of the sofa seat frame, which comprises the following steps:

as shown in fig. 2, an automatic sofa seat frame production system includes:

the transportation device 1 comprises a mounting frame 11 and a moving assembly 12, wherein the mounting frame 11 is arranged in a rotary manner; a plurality of groups of the moving assemblies 12 move along the path of the mounting rack 11, and each moving assembly 12 comprises two groups of moving blocks 121 which are symmetrically arranged and can be arranged in a vertical sliding manner and a rotating plate 122 which is rotatably arranged between the two groups of moving blocks 121;

the fixing device 2 comprises a traversing component 21 arranged on the rotating plate 122 in a left-right sliding manner, two groups of square holes 22 symmetrically formed along the length direction of the rotating plate 122 and used for placing iron sheets, an adjusting component 23 rotatably arranged in the rotating plate 122 and capable of entering the corresponding square hole 22, and a pressing component 24 rotatably arranged on the adjusting component 23 and in power connection with the adjusting component 23; the adjusting assembly 23 is in power connection with the traversing assembly 21;

the feeding device 3 comprises a serpentine spring feeding box 31 erected above the mounting frame 11, a material baffle 32 correspondingly installed on the moving block 121 and arranged opposite to the rotating plate 122, and a limiting assembly 33 slidably arranged at a discharge port at the bottom of the serpentine spring feeding box 31 and capable of abutting against the traverse assembly 21;

the binding device 4 comprises a lifting device 41 arranged at the rear side of the serpentine spring feeding box 31 along the advancing direction of the moving assembly 12, a steel nail gun assembly 42 fixedly connected with a power output section of the lifting device 41 and correspondingly aligned with the square hole 22, and a pressing plate 43 elastically arranged below the steel nail gun assembly (42) and abutted against the moving assembly 12;

the gripping device 5 comprises a conveying assembly 52 arranged below the mounting frame 11 in a rotating mode, a strip attaching device 51 arranged on the rear side of the steel nail gun assembly 42 along the moving path of the conveying assembly 52, a plurality of groups of gripping assemblies 53 arranged on the conveying assembly 52, and a power assembly 54 correspondingly arranged in the gripping assemblies 53 and in power connection with the steel nail gun assembly 42; the grabbing component 52 sequentially passes through a feeding area 501, the steel nail gun component 42, the strip attaching equipment 51 and a discharging area 502;

the stacking device 6 comprises two groups of sliding supports 61 correspondingly arranged below the feeding area 501 and the discharging area 502, moving plates 62 respectively arranged on the two groups of sliding supports 61 in a sliding mode and moving in the vertical and reverse directions, a receiving assembly 63 rotatably arranged on the moving plates 62, and a synchronizing assembly 64 driving the two groups of moving plates 62 to move simultaneously and connected with the conveying assembly 52 in a power mode.

It should be noted that the lifting device 41 is a prior art.

It should be further noted that the manipulator 30 places the opening of the buckle 8 inwards at the striker plate 32, and the striker plate 32 is magnetic, so that the placement of the buckle 8 is facilitated.

It is worth mentioning that the conveying assembly 52 is a rotary belt conveyor.

It is important to note that, as shown in fig. 2, after the sofa seat frame 7 completes the installation of the serpentine spring 9 under the steel nail gun assembly 42, the sofa seat frame 7 is conveyed to the strip attaching device 51 for the installation of the rubber strips, and the strip attaching device 51 is an existing mechanical hand binding device.

Further, as shown in fig. 3 and 5, the moving assembly 12 further includes a slide rail 129 installed inside the mounting frame 11, a slide block 123 correspondingly slidably disposed in the slide rail 129, a pair of guide rails 124 vertically and fixedly installed on the slide block 123 and used for slidably installing the moving block 121, a spring 125 elastically connecting the guide rails 124 and the moving block 121, a vertical rod 126 vertically and fixedly installed on the moving block 121 and capable of abutting against the pressing plate 43, a chain 127 located on one side of the mounting frame 11 and fixedly connected to top ends of the pair of guide rails 124, and a rack and pinion transmission mechanism 128 driving the rotating plate 122 to rotate.

It should be noted that the chain 127 is arranged in a rotary manner and is driven by an external power device.

Further, when the moving block 121 moves downward, the rotating plate 122 rotates by the rack and pinion mechanism 128.

Further, as shown in fig. 8 to 10, the traverse module 21 includes a sliding frame 211 disposed in the rotating plate 122 in an elastic sliding manner, two sets of limit blocks 212 disposed above the rotating plate 122 in a sliding manner and fixedly connected to the sliding frame 211, a guide rod 213 fixedly installed below the sliding frame 211 and extending out of the rotating plate 122, and a guide slot 214 extending along the advancing direction of the moving module 12; the guide groove 214 is provided in a wave shape and the guide rod 213 is movable along the guide groove 214.

Further, as shown in fig. 6 and 7, the limiting component 33 includes two sets of limiting bars 331 vertically fixed in the serpentine spring feeding box 31 and alignable with the two sets of limiting blocks 212, two sets of cross bars 332 symmetrically disposed and transversely slidably disposed at the bottom ends of the limiting bars 2321, an arc plate 333 correspondingly fixedly mounted at the end of the cross bar 332 and configured to abut against the serpentine spring, a boss 334 fixedly mounted on the limiting block 212, and a limiting rod 335 vertically slidably disposed at the bottom of the limiting bar 331 and configured to abut against the boss 334; the limiting rod 335 comprises a protrusion 3351 and a matching part 3352 which are vertically arranged and are abutted against the cross rod 332.

It should be noted that, when the moving plate 122 moves to the lower side of the serpentine spring feeding box 31, the boss 334 abuts against the limit rod 335, the limit rod 335 moves upward, and the cross bar 332 switches from the engagement with the protrusion 3351 to the engagement with the engagement portion 3352, so as to drive the arc plate 333 to disengage from the abutment against the serpentine spring 9, and the serpentine spring 9 can smoothly fall onto the rotating plate 122, and then the boss 334 disengages from the limit rod 335, and the limit rod 335 resets, and the cross bar 332 resets, and since the distance between the lower surface of the serpentine spring feeding box 31 and the upper surface of the rotating plate 122 is the thickness of the serpentine spring 9, the arc plate 333 fixes the serpentine spring 9 at the lowest side of the serpentine spring feeding box 31.

It should be further noted that the rotating plate 122 is provided with a magnetic material, and the serpentine spring 9 falling onto the rotating plate 122 is clamped between the two sets of the limit blocks 212.

It is important to note that, in the process of moving the moving plate 122 forward, the guide rod 213 moves along the guide groove 214, so that the sliding frame 211 and the two limit blocks 212 move laterally, and further the serpentine spring 9 is driven to move laterally, and the serpentine spring 9 moves left and right to the limit position respectively and cooperates with the striker plate 32, so that both ends of the serpentine spring 9 are engaged with the buckles 8.

Further, as shown in fig. 9 and 10, the adjusting assembly 23 includes a fixed mounting in the mounting seat 231 in the rotating plate 122, a rotating rod 232 installed on the mounting seat 231 through a torsion spring, a fixed mounting at the end of the rotating rod 232 and capable of being mounted on the supporting plate 233 of the square hole 22, a blocking rod 234 erected above the mounting seat 231 and capable of being abutted against the rotating rod 232, a gear b235 coaxially and fixedly arranged with the rotating shaft of the rotating rod 232, and a rack b236 fixedly connected with the sliding frame 211 and engaged with the gear b 235.

It should be noted that, after one end of the serpentine spring 9 is clamped with the buckle 8, in the process that the traverse moving assembly 21 moves to the reset position, after the buckle 8 passes through the square hole 22, due to gravity, an opening of the buckle 8 faces downward, and the rack b236 is engaged with the gear b235, so that the rotating rod 232 rotates to drive the supporting plate 233 to rotate, the supporting plate 233 collides with the buckle 8 to drive the buckle 8 to rotate, the buckle 8 rotates to the outside, and the supporting plate 233 enters the square hole 22 and the upper surface of the supporting plate 233 is flush with the rotating plate 122.

Further, as shown in fig. 9 and 10, the pressing component 24 includes a right-angle plate 241 rotatably installed at one end of the supporting plate 233 close to the end of the rotating plate 122 through a torsion spring, a sliding rod 242 slidably disposed at the bottom of the supporting plate 233 and capable of abutting against the right-angle plate 241, a rack c243 fixedly installed below the sliding rod 242, a gear c244 rotatably installed on the rotating rod 232 and engaged with the rack c243, and a gear d245 coaxially and fixedly installed on the rotating shaft of the rotating rod 232 and capable of being engaged with the gear c 244.

It should be noted that, after one end of the serpentine spring 9 is clamped with the buckle 8, and the traverse moving assembly 21 continues to move after moving and resetting, at this time, the stop lever 234 collides with the rotating lever 232, the supporting plate 233 stops rotating, then the gear b235 continues to rotate, the gear d245 continues to rotate, and further the gear c244 continues to rotate, and further the rack c243 is driven to move, so as to drive the sliding rod 242 to rotate, the sliding rod 242 drives the right-angle plate 241 to rotate, and the right-angle plate 241 cooperates with the supporting plate 233 to press the opening of the buckle 8, so that the buckle 8 and the serpentine spring 9 are fixed.

It should be noted that both ends of the serpentine spring 9 are fixed to the buckle 8 through the above-mentioned process.

It is important to note that, as shown in fig. 3 and 10, the nail gun assembly 42 includes a horizontal plate 421 fixedly connected to the power output end of the lifting device 41, and nail guns 422 fixedly installed at both ends of the horizontal plate 421 in the length direction and capable of extending into the rotating plate 122, and the working principle and the working process of the nail guns 422 are the prior art.

It should be noted that, when a plurality of groups of the rotating plates 122 move to the lower side of the pressing plate 43, the lifting device 41 drives the nail gun assembly 42 and the pressing plate 43 to move downwards, and the pressing plate 43 abuts against the vertical rod 126 to push the moving block 121 to move downwards, so as to drive the rotating plates 122 to move downwards.

It should be noted that after the rotating plate 122 rotates 180 °, the rotating plate 122 makes the coil spring 9 and the buckle 8 tightly contact the sofa seat frame 7, then the lifting device 41 moves downward continuously, the nail gun assembly 42 extends into the rotating plate 122, then the nail gun 422 drives a nail into the sofa seat frame 7, and then the buckle 8 and the sofa seat frame 7 are fixed.

It should be noted that, in order to fix the buckle 8 and the sofa seat frame 7 by the nail gun 422, the pressing plate 43, the rotating plate 133 and the supporting plate 233 are all provided with process holes.

Further, as shown in fig. 12, the grabbing assembly 53 includes a fixing seat 531 fixedly installed on the conveying assembly 52, a mounting plate 532 fixedly installed on the fixing seat 531 and alignable with the horizontal plate 421, and two sets of clamping plates 533 symmetrically and slidably installed on the mounting plate 532.

Further, as shown in fig. 14 to 16, the power assembly 54 includes a bidirectional screw a541 rotatably installed in the middle of the mounting plate 532, two sets of gears e542 symmetrically and rotatably installed on two sides of the mounting plate 532, two sets of pulley assemblies a543 correspondingly and drivingly connected to the bidirectional screw a541 and the gears e542, and two sets of racks e546 fixedly connected to the nail gun assembly 42 and capable of simultaneously engaging with the two gears e542 located on different sides of the two mounting plates 532 above the feeding area 501 and the blanking area 502; a ratchet wheel component 5421 is arranged in the gear e 542; two sets of the clamping plates 533 are in threaded fit with the bidirectional screw a 541.

It should be noted that, when the pressing plate 43 is directly opposite to the sofa seat frame 7 and both the pressing plate 43 and the sofa seat frame 7 are located in the material feeding area 501 and aligned with each other, at this time, the sofa seat frame 7 with the serpentine springs 9 and the rubber strips installed therein is located in the material feeding area 501, the pressing plate 43 drives two sets of racks e546 to be engaged with the corresponding gears e542 and drives the gears e542 to rotate, and then the belt pulley assembly 543 drives the rotating shaft 541 and the gears f544 to rotate, so as to drive two sets of racks d545 to rotate, and then two sets of the clamping plates 53 located on the mounting plate 532 move correspondingly.

More specifically, the two sets of clamping plates 533 on the mounting plate 532 in the loading area 501 are close to each other to fix the sofa seat frame 7; the two sets of clamping plates 533 on the mounting plate 532 at the blanking area 502 are away from each other to release the clamping of the sofa seat frame 7.

It should be noted that, under the action of the ratchet assembly 5421, the rack e546 drives the gear e542 to idle in the process of resetting the pressing plate 43.

Further, as shown in FIGS. 17 to 21, the receiving assembly 63 comprises a rotating cylinder 631 rotatably mounted on the moving plate 62, a receiving plate 632 rotatably mounted on the rotating cylinder 631, two sets of gears f633 rotatably mounted on the upper and lower surfaces of the moving plate 63, a pulley assembly b634 above the transmission connection and in power connection with the rotating cylinder 631, the gears f633 below the transmission connection and a pulley assembly c635 of the receiving plate 632, two sets of missing teeth 636 with staggered teeth and capable of being meshed with the two sets of gears f633, a rack unit 637 vertically arranged in a sliding manner, gears h638 with two sets of missing teeth 636 and the rack unit 637 in a power connection manner through a worm gear transmission assembly, a plurality of sets of blocks 639 circumferentially mounted at the top end of the outer wall of the rotating cylinder 631 in a one-to-one correspondence manner, and triangular blocks 630 elastically mounted at the bottom of the receiving plate 632.

It should be noted that, several groups of the sofa seat frames 7 are alternately stacked on the adapting plate 632 located at the loading area 501.

It should be noted that, the two sets of the clamping plates 533 are far away from each other, and the distance between the two sets of the clamping plates does not affect the receiving plate 632 to drive the sofa seat frame 7 to rotate.

Further, as shown in fig. 12, the synchronizing assembly 64 includes a rotating frame a641 fixedly installed at the middle position of the two sets of sliding brackets 61, a rotating frame b645 fixedly installed at one side of the rotating frame a641, a bidirectional screw b642 vertically and rotatably installed at the middle position of the rotating frame 641, a bidirectional screw c646 vertically and rotatably installed at the middle position of the rotating frame b645, nuts a643 respectively in threaded engagement with the bidirectional screw b642 and fixedly connected with the moving plate 62, nuts b647 respectively in threaded engagement with the bidirectional screw c646 and fixedly connected with the rack unit 637, and a driving unit 644 for driving the bidirectional screw b642 and the bidirectional screw c646 to rotate alternately; the drive unit 644 is in powered communication with the transport assembly 52.

It should be noted that, as shown in fig. 13 and fig. 22, the driving assembly 644 includes a motor 6441, a conical tooth assembly 6442 connected to the power shaft of the motor 6441, gears g6445 coaxially and fixedly installed below the bidirectional screw b642 and the bidirectional screw c646, a half-tooth 6446 rotatably installed between two sets of gears g6445 and capable of meshing with the gears g6445, a pulley assembly d6443 drivingly connecting the conical tooth assembly 6442 and the half-tooth 6446, and a pulley assembly e6444 drivingly connecting the power shaft of the motor 6441 and the conveying assembly 52.

It should be further noted that, as the conveying assembly 52 rotates to protect and convey the gripping assembly 53, the conveying assembly 52 drives the half-tooth 6446 to rotate, the half-tooth 6446 drives the bidirectional screw b642 to rotate, and further drives the moving plate 62 at the feeding area 501 to move upwards, and drives the moving plate 62 at the discharging area 502 to move downwards, so that the sofa seat frame 7 to be processed can be pushed to be tightly attached to the mounting plate 532; meanwhile, the blanking area 502 is moved out of the receiving space.

It is important to be noted that when the moving plate 62 moves, the gear h638 and the rack unit 637 drive the worm and worm gear assembly to rotate, and then drive the two sets of the missing teeth 636 to rotate, the two sets of the missing teeth 636 drive the gear f633 to sequentially drive the rotating cylinder 631 and the receiving plate 632 to rotate, and under the action of the pulley assembly b634 and the pulley assembly c635, the rotating cylinder 631 rotates 90 ° each time, and the receiving plate 632 rotates 180 ° each time; thereby completing the material receiving and discharging of the upper layer and the lower layer

It should be further noted that in the stacking manner of the sofa seat frames 7 in the present invention, each layer has two groups of the sofa seat frames 7, when the same layer is receiving and loading, the moving plate 62 needs to keep a static state, at this time, the half-tooth 6446 drives the bidirectional screw c646 to rotate, the nut b647 moves and drives the rack unit 637 to move, so as to separately drive the receiving assembly 63 to rotate, and smoothly complete receiving and discharging of the same layer.

It should be noted that when the rotating cylinder 631 rotates, the square block 639 collides with the triangular block 630 and carries the triangular block 632 to rotate synchronously; when the bearing plate 632 rotates, the triangular block 630 can cross the square block 639, so that the bearing plate 632 at the blanking area 502 can be staggered and stacked to the sofa seat frame 7, so that the sofa seat frame 7 can be stacked more stably after being processed, and meanwhile, the bearing plate 632 at the loading area 501 can be staggered and stacked to the sofa seat frame 7 to smoothly perform loading.

The working process of the equipment is as follows:

the serpentine spring 9 is neatly placed in the serpentine spring feeding box 31, and before the rotating plate 122 moves below the serpentine spring feeding box 31, the manipulator 30 places the opening of the buckle 8 inward at the striker 32, and then when the rotating plate 122 moves below the serpentine spring feeding box 31, the boss 334 collides with the limit rod 335, the limit rod 335 moves upward, the cross bar 2322 switches from the engagement with the protrusion 23251 to the engagement with the engagement portion 23252, and further drives the arc-shaped plate 332 to disengage from the collision with the serpentine spring 9, the serpentine spring 9 can smoothly fall onto the rotating plate 122 and be adsorbed by the rotating plate 122, and then the boss 334 disengages from the limit rod 335, the limit rod 335 resets, and the cross bar 332 resets, and the arc-shaped plate 333 fixes the serpentine spring 9 at the lowest position of the serpentine spring feeding box 31, then the rotating plate 122 carrying the serpentine spring 9 moves forward, the guide rod 213 moves along the guide slot 214, so that the sliding rack 211 and the two limit blocks 212 move laterally, and then the serpentine spring 9 is driven to move laterally, after one end of the serpentine spring 9 is clamped with the buckle 8, the sliding rack 211 moves to the process of resetting, after the buckle 8 passes through the square hole 22, due to gravity, the opening of the buckle 8 faces downward, the rack b236 is engaged with the gear b235, and then the rotating rod 232 rotates, so that the supporting plate 233 is driven to rotate, the supporting plate 233 interferes with the buckle 8 and drives the buckle 8 to rotate, the buckle 8 rotates to the outside, and the supporting plate 233 enters the square hole 22 and the upper surface is flush with the rotating plate 122, and then the sliding rack 211 continues to move, at this time, the stop lever 234 collides with the rotating lever 232, the support plate 233 stops rotating, then the gear b235 continues rotating, the gear d245 continues rotating, the gear c244 continues rotating, the rack c243 is driven to move, the slide rod 242 is driven to rotate, the slide rod 242 drives the right-angle plate 241 to rotate, the right-angle plate 241 cooperates with the support plate 233 to press the opening of the buckle 8, the buckle 8 is fixed to the coil spring 9, the other end of the coil spring 9 is also clamped to the buckle 8, the buckle 8 and the coil spring 9 are fixed through the above processes, then the rotating plate 122 faces below the pressing plate 43, the conveying assembly 52 conveys the sofa seat frame 7 to the position right below the pressing plate 43, and the grabbing assemblies 53 are arranged at the feeding area 501 and the blanking area 502, the lifting device 41 drives the steel nail gun assembly 42 and the pressing plate 43 to move downwards, the pressing plate 43 is abutted against the vertical rod 126, so as to push a plurality of groups of moving blocks 121 to move downwards synchronously, the rotating plate 122 rotates 180 degrees under the action of the corresponding gear-rack transmission mechanism 128, the rotating plate 122 enables the serpentine springs 9 and the buckles 8 to be tightly attached to the sofa seat frame 7, then the lifting device 41 moves downwards continuously, the steel nail gun 422 extends into the rotating plate 122, then the steel nail gun 422 drives nails into the sofa seat frame 7, further the buckles 8 and the sofa seat frame 7 are fixed, a plurality of groups of serpentine springs 9 are installed on the sofa seat frame 7 at equal intervals, and simultaneously, with the downward movement of the steel nail gun assembly 42 again, the rack e546 is meshed with the gear e542 and drives the gear e542 to rotate, the belt pulley assembly 543 drives the two-way screw a541 to rotate, so as to drive the two groups of clamping plates 533 to move, the sofa seat frame 7 at the feeding area 501 is grabbed, and the sofa seat frame 7 at the discharging area 502 is put down; the conveying assembly 52 sends the sofa seat frame 7 which is completely installed with the serpentine spring 9 to the strip attaching device 7 for installing the rubber strips, then the conveying assembly 52 sends the sofa seat frame 7 to the blanking area 502, and the other grabbing assembly 53 is located at the feeding area 501, meanwhile, the conveying assembly 52 also drives the half-tooth 6446 to synchronously rotate, the half-tooth 6446 drives the two-way screw b642 to rotate, and then the moving plate 62 at the feeding area 501 is driven to move upwards, the moving plate 62 at the blanking area 502 is driven to move downwards, and the sofa seat frame 7 to be processed is pushed to be tightly attached to the mounting plate 532; the half-tooth 6446 also drives the bidirectional screw c646 to rotate, the nut b647 moves and drives the rack unit 637 to move, thereby realizing that the bearing component 63 is driven to rotate independently, and the worm gear component is driven to rotate by matching the gear h638 and the rack unit 637, then the two sets of the teeth 636 are driven to rotate, the two sets of the teeth 636 drive the gear f633 to drive the rotating cylinder 631 and the receiving plate 632 to rotate in sequence, and under the action of the pulley assembly b634 and the pulley assembly c635, the rotating cylinder 631 rotates 90 degrees each time, the receiving plate 632 rotates 180 degrees each time to realize that the sofa seat frame 7 is stacked on the receiving plate 632 at the blanking area 502 in a staggered manner, so that the sofa seat frame 7 after being processed is stacked more stably, meanwhile, the sofa seat frame 7 stacked in a staggered manner on the bearing plate 632 in the loading area 501 can be smoothly loaded.

Claims (10)

1. An automatic production method of a sofa seat frame is characterized by comprising the following steps:

the method comprises the following steps: the buckle is fed, and the manipulator places the buckle opening inwards on the moving block (121) and abuts against the striker plate (32);

step two: after the first step, the moving block (121) drives the rotating plate (122) to move to the position right below the serpentine spring feeding box (31), and under the action of the transverse moving assembly (21), the limiting assembly (33) moves to enable one serpentine spring to fall onto the rotating plate (122) and be limited by two groups of limiting blocks (212);

step three: the buckle and the serpentine spring are fixed, after the second step, the rotating plate (122) leaves the serpentine spring feeding box (31), the two groups of limiting blocks (212) drive the serpentine spring to move in a reciprocating mode to enable two ends of the serpentine spring to be clamped with the buckle, in the process of moving the serpentine spring in a transverse mode, the adjusting assembly (23) drives the opening of the buckle to face outwards, then the pressing assembly (24) rotates to press the buckle to enable the buckle and the serpentine spring to be fixed, and then the rotating plates (122) move to the position right below the steel nail gun assembly (42);

step four: conveying the sofa seat frame, wherein the conveying component (52) rotates at the same time as the third step, and the grabbing component (53) carries the sofa seat frame to be processed to move to the position right below the steel nail gun component (42);

step five: mounting a serpentine spring, wherein after the fourth step, the lifting device (41) drives the steel nail gun assembly (42) to move downwards, the pressing plate (43) pushes a plurality of groups of moving blocks (121) to move downwards simultaneously, then a plurality of groups of rotating plates (122) synchronously rotate for 180 degrees, so that a buckle is in contact with the serpentine spring and the sofa seat frame, and then the steel nail gun assembly (42) binds the buckle with the sofa seat frame;

step six: mounting the rubber bands, namely moving the sofa seat frame bound with the serpentine springs under the action of the conveying assembly (52) to be over against the strip attaching equipment (51) to mount the rubber bands after the fifth step;

step seven: discharging the sofa seat frame, wherein after the sixth step, the conveying assembly (52) rotates, the sofa seat frame is conveyed into a blanking area (502) along with the grabbing assembly (53), and the synchronizing assembly (64) synchronously rotates to enable the grabbing assembly (53) which is positioned at the blanking area (502) to form a material receiving space with the receiving assembly (63), and then the grabbing assembly (53) loosens the fixation of the sofa seat frame, so that the sofa seat frame can smoothly fall down;

step eight: after the seventh step, the conveying assembly (52) rotates, the grabbing assembly (53) moves to the material loading area (501), and the synchronizing assembly (64) synchronously rotates, so that the receiving assembly (63) in the material loading area (501) drives the sofa seat frame to move to a grabbing place to wait for being grabbed.

2. The automatic production method of the sofa seat frame according to claim 1, wherein in the first step and the second step, the rotating plate (122) and the striker plate (32) are both provided with magnetism to facilitate the fixation of the serpentine spring and the buckle.

3. The automatic sofa frame production method according to claim 1, wherein in the second step, only when the rotating plate (122) is located right under the serpentine spring feeding box (31), the limiting component (33) releases the binding of the lowest serpentine spring of the serpentine spring feeding box (31) so that the lowest serpentine spring falls onto the rotating plate (122), and the thickness between the upper surface of the rotating plate (122) and the serpentine spring feeding box (31) is consistent with the serpentine spring diameter, so that the serpentine spring feeding box (31) is discharged in order, and only one serpentine spring is carried when the rotating plate (122) leaves the serpentine spring feeding box (31).

4. The automatic production method of the sofa seat frame according to claim 1, wherein in the third step, the guiding rod (213) moves along the guiding groove (214) arranged in the wave shape to drive the two sets of the limiting blocks (212) and the serpentine spring to move transversely, and the serpentine spring moves to the limit position in one direction to match with the baffle plate (32) to complete the clamping of the end part of the serpentine spring and the buckle, and then in the process that the limiting blocks (212) and the serpentine spring move back to the limit position at the other end, the support plate (233) rotates first to rotate the buckle opening 180 °, then the support plate (233) stops rotating, and the right-angle plate (241) at the end part of the support plate (233) rotates to press the buckle opening to fix the buckle and the serpentine spring; the serpentine spring moves back and forth until the two ends of the serpentine spring are fixed with buckles.

5. The automatic sofa seat frame production method according to claim 1, wherein in step five, the moving block (121) and the conveying assembly (52) stop conveying, the moving block (121) rotates under the action of a gear and rack transmission mechanism (128) when moving downwards, and the steel nail gun assembly (42) moves downwards to fix the buckle with the sofa seat frame when the pressing plate (43) and the rotating plate (122) move to the limit position.

6. The automatic sofa seat frame production method according to claim 1, wherein in the fifth step to the eighth step, the conveying assembly (52) is provided with a plurality of groups of the grabbing assemblies (53), each rotation of the conveying assembly (52) moves different grabbing assemblies (53) to corresponding stations, that is, when the conveying assembly (52) stops moving, the feeding area (501), the steel nail gun assembly (42), the strip attaching device (51) and the blanking area (502) always have sofa seat frames to be processed with corresponding processes and the grabbing assemblies (53) for fixing the sofa seat frames.

7. The method as claimed in claim 6, wherein in the seventh and eighth steps, the steel nail gun assembly (42) moves downwards and simultaneously drives the two sets of clamping plates (533) to loosen or clamp the sofa seat frame through the two sets of racks e (546) and the corresponding gears e (542).

8. An automatic sofa frame production method according to claim 7, characterized in that in step seven and step eight, the rack e (546) is engaged with the gear e (542) located in the blanking area (502) and arranged at the front side of the mounting plate (532) along the conveying direction of the conveying assembly (52), thereby driving the two sets of clamping plates (533) away from each other and releasing the fixation of the sofa frame; the other rack e (546) is meshed with the gear e (542) which is positioned in the feeding area (501) and arranged at the rear side of the mounting plate (532) along the conveying direction of the conveying assembly (52), so that the two groups of clamping plates (533) are driven to approach each other and the sofa seat frame is clamped and fixed.

9. The automatic production method of the sofa seat frame according to claim 1, wherein in the seventh step and the eighth step, the bidirectional screw b (621) and the bidirectional screw c (646) rotate alternately, and when the bidirectional screw b (621) rotates, the receiving plate (632) is driven to move up and down, and simultaneously, the rotating cylinder (631) and the receiving plate (632) are driven to rotate correspondingly; when the bidirectional screw c (646) rotates, only the rotary cylinder (631) and the receiving plate (632) are driven to rotate correspondingly.

10. The automatic production method of the sofa seat frame according to claim 9, wherein in the seventh step and the eighth step, when two sets of the receiving assemblies (63) move, the gear h (638) and the rack unit (637) cooperate to drive the worm gear assembly to rotate, and further drive two sets of the missing teeth (636) with staggered teeth to rotate, and under the interference effect of the square block (639) and the triangular block (630), the receiving plate (632) rotates 90 ° with the rotating cylinder (631) and the receiving plate (632) rotates 180 ° alone, and the two rotation modes are performed at intervals.

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