Automatic assembling device for inner and outer back frames of seat

Abstract

The utility model discloses an automatic assembling device for inner and outer back frames of a seat, which comprises a workbench, a positioning component arranged on the workbench and used for placing the back frames of the seat and a lifting component arranged on the workbench, the lifting component is erected above the positioning component and comprises a mounting plate, and the mounting plate is fixed on the workbench through a guide rod. A driving piece is arranged on the mounting plate, and a lifting plate connected with the driving piece is arranged below the mounting plate; the pressing assembly is arranged on the lower end face of the lifting plate, the lifting plate and the pressing assembly are driven by the driving piece to move downwards, the seat back frame placed on the positioning assembly is pressed, and buckling of the inner back frame and the outer back frame is achieved. The lifting plate and the pressing rod are driven by the air cylinder to descend, the seat back frame placed on the positioning assembly is pressed, buckling of the inner back frame and the outer back frame is promoted, the problem that in the process of manually buckling the inner back frame and the outer back frame in the chair back assembling process, the knocking manpower consumption is large is solved, the labor cost is reduced, and the manual operation procedures are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of seat processing, and in particular relates to an automatic assembly device for inner and outer back frames of a seat. Background Art

[0002] With the development of society and the improvement of living standards, people are pursuing a healthier and more comfortable quality of life. In the process of purchasing healthy office furniture, mesh chairs have become one of the mainstream products for people to buy office chairs due to their comfort and environmental protection. In order to improve air permeability and heat dissipation, the back of a mesh chair is generally composed of an inner and outer back frame and a mesh fabric. In the prior art, when assembling the inner and outer back frames of a mesh chair back, the back frame is often manually pressed and knocked to lock it. There are many problems in the processing process, such as the following specific processing steps:

[0003] Step 1: First place the inner and outer back frames and mesh fabrics in the center of the work surface, and stack them neatly from bottom to top in the order of outer back frame, inner back frame, and mesh fabrics. Arrange the texture direction of the mesh fabrics and fix them on the inner back frame according to the product appearance requirements. Use a rubber hammer to tap around the inner and outer back frames to knock the inner back frame into the outer back frame. This step is because the mesh fabrics fixed on the inner back frame make it difficult to snap together. The gap between the inner back frame and the outer back frame is small, and it is difficult to snap together at one time with the worker's hand strength. Therefore, a preliminary knock-in is performed first to locate the placement of the inner back frame and then reinforce it. This process is time-consuming and wastes human resources, increasing production costs.

[0004] Step 2: Press one side of the inner and outer back frames, raise the rubber hammer to the same level as the head and perpendicular to one corner of the inner back frame, swing the rubber hammer hard to smash the inner back frame into the outer back frame to fasten and fix; after it is fixed, fasten and fix the diagonal position; do the same for the other two corners. The purpose of this step is to fix the four corners of the inner back frame so that other parts can be fastened later. At this time, because the shape of the inner and outer back frames is shaped according to the curved surface that fits the curve of the human body, the inner back frame is easy to tilt and slide when the worker knocks, making it difficult to fasten the four corners of the inner and outer back frames at one time; and continuous knocking on the inner and outer back frames consumes a lot of workers' strength, which can easily make workers tired, resulting in differences in the fastening effects of subsequent batches of products, reducing product quality and affecting user experience.

[0005] Step 3: Knock on the inner and outer back frames to fasten and fix them in other directions. At this point, most of the inner and outer back frames are fastened, and it is easier for workers to knock in the inner back frame. The fastening of the inner and outer back frames can be completed by knocking on all the fastening points on the frame edge; however, due to the manual force of the whole process, the inner and outer back frames are not fastened in one go, and the mesh fabric fixed on the inner back frame is easily pulled, the mesh texture is easily skewed, the degree of tension is easy to loosen, and even fall off, affecting the aesthetic effect of the product. In addition, the mesh fabric increases the friction of the inner and outer back frames. When fastening, it is necessary to knock hard, which is easy to damage the back frame, resulting in material waste and increased costs. If the knocking force is small, the inner and outer back frames will not be fastened completely. Bumps during transportation may cause the inner back frame to fall off, and it will be difficult to re-fasten during subsequent installation, affecting the installation effect.

[0006] In summary, the method of manually pressing and knocking the inner and outer back frames to fasten and fix them has the difficulties of high difficulty in operation, high difficulty coefficient, and susceptibility to external factors, which affects production efficiency and the overall appearance of the product, and easily produces quality differences between product batches, resulting in large cost losses. In addition, long-term knocking on the inner and outer back frames can easily cause worker hand fatigue, cause labor injuries, and consume human resources. In order to overcome the above problems, it is urgent to design an auxiliary device for installing the inner and outer back frames of seats that is easy to operate, has higher production efficiency, and has lower labor intensity. Utility Model Content

[0007] In order to make up for the deficiencies of the prior art, the utility model provides an automatic assembly device for inner and outer back frames of seats, which can buckle and fix the inner and outer back frames in one go by mechanically pressing the inner back frames, so as to solve the problems of manpower consumption and poor installation effect encountered during the assembly process of the inner and outer back frames of seats.

[0008] The automatic assembly device for the inner and outer back frames of a seat comprises a workbench, on which a positioning assembly for placing the seat back frame is arranged, and on which a lifting assembly is also arranged, and the lifting assembly is erected above the positioning assembly, and the lifting assembly comprises a mounting plate, and the mounting plate is fixed to the workbench through a guide rod, on which a driving member is arranged, and below which a lifting plate connected to the driving member is arranged; a clamping assembly is arranged on the lower end surface of the lifting plate, and the lifting plate and the clamping assembly are driven downward by the driving member to perform a clamping operation on the seat back frame placed on the positioning assembly, thereby realizing the buckling of the inner and outer back frames.

[0009] Furthermore, the positioning assembly includes two first support seats symmetrically arranged on the workbench, and two second support seats are symmetrically arranged on opposite surfaces of the two first support seats. The first support seats are used to support the left and right sides of the seat back frame, and the second support seats are used to support the upper and lower ends of the seat back frame.

[0010] Furthermore, an upwardly protruding curved surface is provided on the upper end surface of the first support seat to fit the curvature of the two side portions of the supporting seat back frame.

[0011] Furthermore, the second support seat is arranged on the midline between the two first support seats, and the length of the second support seat is smaller than that of the first support seat; a concave arc groove is arranged on the upper end surface of the second support seat to fit the upper and lower end surfaces of the supporting seat back frame.

[0012] Furthermore, the driving member is a cylinder, and the lifting plate is cooperatively connected with a piston rod of the cylinder.

[0013] Furthermore, the four ends of the lifting plate are sleeved on the guide rod through sleeves and can move up and down along the guide rod; the middle part of the lifting plate is fixedly connected to the piston rod through a connecting rod, and the piston rod drives the lifting plate to move up and down along the guide rod.

[0014] Furthermore, the clamping assembly includes a plurality of pressure rods arranged on the lower end surface of the lifting plate, and the installation positions of the pressure rods correspond to the first support seat and the second support seat.

[0015] Furthermore, the pressure rods include eight, three of which are evenly spaced corresponding to the first support seat on each side, and one is arranged at a position corresponding to the middle of the second support seat on each side.

[0016] Furthermore, an electric controller is arranged on the mounting plate, and a start switch is arranged on the workbench.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] (1) The present application uses a cylinder to drive the lifting plate and the pressure rod to descend, thereby pressing the seat back frame placed on the positioning assembly to promote the buckling of the inner and outer back frames, solving the problem of high labor consumption caused by manual knocking when buckling the inner and outer back frames during the seat back assembly process, reducing labor costs and reducing manual operation procedures.

[0019] (2) The seat back frame is placed on the first support seat and the second support seat and fixed before pressing together, which solves the problem of unstable shaking when workers buckle the inner and outer back frames during the manual assembly of the seat back, making the operation more convenient and improving efficiency.

[0020] (3) The pressure rods are distributed above the first support seat and the second support seat (i.e., corresponding to the four sides of the seat back frame), which solves the problem of wrinkles and skewness of the mesh cloth due to the uncertainty of manual force during the assembly of the seat back. The use of automatic assembly equipment for the inner and outer back frames can achieve a uniform mesh stretching effect and effectively guarantee the quality.

[0021] (4) The use of this device has low labor intensity, which greatly reduces the labor cost of workers, allowing limited manpower to be invested in more critical steps, thereby improving production efficiency; and the assembly time is increased from 180s / psc to 20s / psc, with an efficiency increase of 89%. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0023] Figure 2 This is the main structural diagram of the utility model;

[0024] Figure 3 This is a side structural diagram of the utility model;

[0025] Figure 4 This is an installation diagram of the positioning assembly and the seat back frame of the utility model.

[0026] In the figure: 1-workbench, 2-positioning assembly, 21-first support seat, 22-second support seat, 3-lifting assembly, 31-mounting plate, 32-driving member, 33-lifting plate, 34-guide rod, 35-piston rod, 36-sleeve, 37-connecting rod, 4-clamping assembly, 41-pressure rod, 5-seat back frame, 6-barometer, 7-electric controller, 8-start switch. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the present invention is further described below in conjunction with the accompanying drawings.

[0028] like Figure 1-Figure 3 As shown, an automatic assembly device for inner and outer seat back frames includes a workbench 1, on which a positioning assembly 2 for placing a seat back frame 5 is arranged, and on which a lifting assembly 3 is also arranged, and the lifting assembly 3 is erected above the positioning assembly 2. The lifting assembly 3 includes a mounting plate 31, and the mounting plate 31 is fixed to the workbench 1 through a guide rod 34. A driving member 32 is arranged on the mounting plate 31, and a lifting plate 33 connected to the driving member 32 is arranged below the mounting plate 31; a clamping assembly 4 is arranged on the lower end surface of the lifting plate 33, and the lifting plate 33 and the clamping assembly 4 are driven downward by the driving member 32 to implement a clamping operation on the seat back frame 5 placed on the positioning assembly 2, so as to realize the buckling of the inner and outer back frames.

[0029] In this embodiment, the driving member 32 is a cylinder, which cooperates with the barometer 6 set under the workbench 1; the lifting plate 33 is connected to the piston rod 35 of the cylinder. The four ends of the lifting plate 33 are sleeved on the guide rod 34 through the sleeve 36, and can move up and down along the guide rod 34. The middle part of the lifting plate 33 is fixedly connected to the piston rod 35 through the connecting rod 37, and the piston rod 35 drives the lifting plate 33 to move up and down along the guide rod 34. The mounting plate 31 is set on the top of the guide rod 34, and the electric controller 7 is set on the mounting plate 31. The start switch 8 is set on the workbench 1. Turn on the electric controller 7, turn on the start switch 8, adjust the barometer 6, and the air supply on one side of the cylinder generates the air pressure specified by the barometer 6 to push the piston rod 35 to generate thrust, driving the lifting plate 33 and the clamping assembly 4 to move downward. The driving member 32 can also be a motor.

[0030] like Figure 4 As shown, the positioning assembly 2 includes two first support seats 21 symmetrically arranged on the workbench 1, and two second support seats 22 are symmetrically arranged on the opposite surfaces of the two first support seats 21. The first support seat 21 is used to support the left and right sides of the seat back frame 5, and the second support seat 22 is used to support the upper and lower ends of the seat back frame 5. The second support seat 22 is arranged on the midline between the two first support seats 21, and the length of the second support seat 22 is less than the length of the first support seat 21; the upper end surface of the first support seat 21 is provided with an upwardly protruding curved surface to fit the curvature of the two sides of the supporting seat back frame 5; the upper end surface of the second support seat 22 is provided with a concave arc groove to fit the upper and lower end surfaces of the supporting seat back frame 5. It can be seen that the structure of the first support seat 21 and the second support seat 22 can protect the seat back frame 5 to the maximum extent, so that it will not be excessively deformed when subjected to greater pressure, and can play the role of fixing and supporting the seat back frame 5, so that it will not shake or slide when subjected to pressure.

[0031] Continue reading Figure 1-Figure 3 It can be seen that the clamping assembly 4 includes a plurality of pressure rods 41 arranged on the lower end surface of the lifting plate 33, and the installation position of the pressure rod 41 corresponds to the first support seat 21 and the second support seat 22. In this embodiment, there are eight pressure rods 41, three of which are evenly spaced corresponding to the first support seat 21 on each side (that is, three pressure rods 41 are arranged corresponding to the two side walls of the seat back frame 5, and the three pressure rods 41 on both sides are symmetrically arranged), and one is arranged at the position corresponding to the middle of the second support seat 22 on each side (that is, a pressure rod 41 is arranged corresponding to the middle of the upper and lower ends of the seat back frame 5, and the pressure rods 41 at both ends are symmetrically arranged), which avoids the problem of unstable force application and wrinkles and skewness of the mesh, and can ensure that the mesh stretching effect is unified and the quality is effectively guaranteed. In addition, the pressure rod 41 adopts a cylindrical rubber body structure, which is convenient for protecting the seat back frame 5 and avoiding wear on the seat back frame 5 during pressing.

[0032] During the specific operation, the electronic controller 7 is turned on, the start switch 8 is turned on, and the equipment is started. The air supply and energy gathering on one side of the cylinder generates air pressure to push the piston rod 35 to generate thrust, and the lifting plate 33 and the pressure rod 41 are pressed down accordingly, and the seat back frame (including the inner frame and the outer frame) on the positioning component 2 is pressed and fastened. After the fastening is complete, the equipment is turned off, the cylinder is depressurized, the piston rod 35 is retracted, and the lifting plate 33 and the pressure rod 41 are returned accordingly (i.e., they rise and reset), and the assembly can be completed quickly and labor-savingly. The phenomenon of skewed or wrinkled texture of the mesh fabric when the seat back frame 5 is tapped for fixing is eliminated, and no rework and adjustment are required later, avoiding wear of parts and loss of manpower. This equipment makes the entire assembly process of the inner and outer back frames convenient to operate and saves labor costs, reduces unnecessary time waste, improves production efficiency, is not affected by the subjective force of workers, ensures product quality, and perfectly solves the problems existing in the manual assembly process.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An automatic assembly device for inner and outer seat back frames, comprising a workbench (1), on which a positioning assembly (2) for placing a seat back frame (5) is arranged, characterized in that: The workbench (1) is also provided with a lifting assembly (3), the lifting assembly (3) being mounted above the positioning assembly (2), the lifting assembly (3) comprising a mounting plate (31), the mounting plate (31) being fixed to the workbench (1) via a guide rod (34), a driving member (32) being provided on the mounting plate (31), and a lifting plate (33) connected to the driving member (32) being provided below the mounting plate (31); a clamping assembly (4) being provided on the lower end surface of the lifting plate (33), the lifting plate (33) and the clamping assembly (4) being driven downward by the driving member (32), thereby performing a clamping operation on a seat back frame (5) placed on the positioning assembly (2), thereby achieving the buckling of the inner and outer back frames.

2. The automatic assembly device for the inner and outer back frames of a seat according to claim 1, characterized in that: The positioning assembly (2) comprises two first support seats (21) symmetrically arranged on the workbench (1), and two second support seats (22) symmetrically arranged on opposite surfaces of the two first support seats (21), the first support seats (21) being used to support the left and right sides of the seat back frame (5), and the second support seats (22) being used to support the upper and lower ends of the seat back frame (5).

3. The automatic assembly device for the inner and outer back frames of a seat according to claim 2, characterized in that: The upper end surface of the first support seat (21) is provided with an upwardly protruding curved surface so as to fit the curvature of the two side portions of the supporting seat back frame (5).

4. The automatic assembly device for the inner and outer back frames of a seat according to claim 2, characterized in that: The second support seat (22) is arranged on the midline between the two first support seats (21), and the length of the second support seat (22) is less than the length of the first support seat (21); the upper end surface of the second support seat (22) is provided with a concave arc groove to fit the upper and lower end surfaces of the supporting seat back frame (5).

5. The automatic assembly device for the inner and outer back frames of a seat according to claim 2, characterized in that: The driving member (32) is a cylinder, and the lifting plate (33) is connected to a piston rod (35) of the cylinder.

6. The automatic assembly device for the inner and outer back frames of a seat according to claim 5, characterized in that: The four ends of the lifting plate (33) are sleeved on the guide rod (34) through sleeves (36) and can move up and down along the guide rod (34); the middle part of the lifting plate (33) is fixedly connected to the piston rod (35) through a connecting rod (37).

7. The automatic assembly device for the inner and outer back frames of a seat according to claim 5, characterized in that: The clamping assembly (4) comprises a plurality of pressure rods (41) arranged on the lower end surface of the lifting plate (33), and the installation positions of the pressure rods (41) correspond to the first support seat (21) and the second support seat (22).

8. The automatic assembly device for the inner and outer back frames of a seat according to claim 7, characterized in that: The pressure rods (41) include eight, three of which are evenly spaced corresponding to the first support seat (21) on each side, and one is arranged at a position corresponding to the middle of the second support seat (22) on each side.

9. An automatic assembly device for inner and outer back frames of a seat according to any one of claims 1 to 8, characterized in that: An electric controller (7) is arranged on the mounting plate (31), and a start switch (8) is arranged on the workbench (1).

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