Method and apparatus for assembling a chair cushion

Abstract

The application discloses a kind of assembly method and equipment of chair cushion, wherein chair seat cushion includes first frame and second frame, multiple second threaded holes are opened on the first frame and the second frame, the equipment includes upper die and lower die, the first forming cavity matched with first frame is opened on the lower die, the second forming cavity matched with second frame is equipped on the upper die, when assembling, first frame and second frame are placed between upper die and lower die, then upper die and lower die are buckled and extruded first frame and second frame, so that first frame is more matched with first cavity, second frame is more matched with second cavity, first threaded hole and corresponding second threaded hole tend to be coaxial, then in the state that upper die and lower die are buckled, first frame and second frame are fixed along the edge of first frame and second frame by multiple screws;So it can reshape first frame and second frame, and make screw can be vertically screwed into threaded hole, reduce the assembly difficulty of chair cushion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of home furnishing, in particular to a method and device for assembling a chair cushion. BACKGROUND

[0002] The chair cushion usually needs to fix two plastic parts by multiple screws, but due to the different shapes of the two plastic parts, separate molds are needed for production, and the plastic parts are assembled after separate batch manufacturing. Due to the production environment, storage environment, production process and other factors of each plastic part, there is a deviation between the formed plastic part and the design requirement, and the threaded hole positions reserved on the two plastic parts are deviated during the assembly of the chair cushion. When the screws are used to fix the two plastic parts, the screws are in an inclined state. This makes the assembly of the chair cushion require a lot of effort, and the assembly is difficult and time-consuming, and also has a certain impact on the structure of the connection between the two plastic parts. Due to the large inclined angle of the screws, the screws slip when connecting the two plastic parts, resulting in the plastic parts being scrapped. SUMMARY

[0003] In order to solve the problem that the threaded holes on the two plastic parts of the chair cushion cannot be centered due to the deformation of the two plastic parts in the prior art, the purpose of the present application is to provide a method and device for assembling a chair cushion, which can shape the two plastic parts of the chair cushion, center the threaded holes on the two plastic parts, reduce the assembly difficulty of the chair cushion, improve the assembly efficiency of the chair cushion, and make the assembled chair cushion more in line with the design requirements.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: the chair cushion comprises a first frame and a second frame, a plurality of first threaded holes are formed on the first frame, the plurality of first threaded holes are arranged along the edge of the first frame, a plurality of second threaded holes are formed on the second frame, the plurality of second threaded holes are arranged along the edge of the second frame, and the plurality of first threaded holes and the plurality of second threaded holes correspond one by one; an assembly device is used, the assembly device comprises a lower mold and an upper mold, the upper mold is arranged above the lower mold in a lifting manner, the front and rear ends of the lower mold are upwardly curved, and a first cavity matched with the first frame is arranged on the upper surface of the lower mold; the front and rear ends of the upper mold are downwardly curved, a second cavity matched with the second frame is formed on the lower surface of the upper mold, the lower surface of the upper mold is matched with the upper surface of the lower mold, a plurality of second avoiding openings are formed on the upper mold, and the positions of the plurality of second avoiding openings correspond to the plurality of second threaded holes of the second frame; the assembly process of the chair cushion is as follows:

[0005] Step 1), placing the first frame in the first cavity of the lower mold, placing the second frame on the first frame, and coarsely positioning the first frame and the second frame;

[0006] Step 2), the upper die moves down to press the second frame and the first frame, the second frame and the first frame are deformed after being pressed, so that the second frame gradually matches the second cavity, the first frame gradually matches the first cavity, and the corresponding first threaded hole and second threaded hole tend to be coaxial; wherein the upper die gradually interfaces with the second frame when moving down, and the upper die continuously adjusts the relative position of the second frame and the first frame; when the upper die and the lower die are completed, the upper half of the second frame is inserted into the second cavity, the lower half of the second frame is inserted into the first cavity, and the edge of the second frame abuts against the first frame;

[0007] Step 3), the first frame and the second frame are fixed by using multiple screws; wherein when the screws are installed, the screws are screwed into the second threaded hole of the second frame and the first threaded hole of the first frame;

[0008] Step 4), after the first frame and the second frame are fixed, the upper die and the lower die are separated, and the assembled chair cushion is taken out.

[0009] Preferably, the first cavity is provided with a first pressure relief groove.

[0010] Preferably, the second cavity is provided with a second pressure relief groove.

[0011] Preferably, the upper die and the lower die are both formed by multiple shaped blocks.

[0012] Preferably, the lower die is rotatably installed on the workbench, and the upper die is liftably installed on the workbench, and the upper die can rotate with the lower die.

[0013] Preferably, the lower die is slidably installed on the workbench, and the upper die is liftably installed on the workbench.

[0014] Preferably, the assembly device further comprises a screw driving device, the screw driving device can arrange the screws, and the screw driving device can screw the screws into the second threaded hole and the first threaded hole by using an electric screwdriver.

[0015] Preferably, the screw driving device comprises a screw feeder for arranging the screws, and the electric screwdriver can pick up the screws on the screw feeder and then screw the picked-up screws into the second threaded hole and the first threaded hole.

[0016] Preferably, the screw feeder and the electric screwdriver are installed on the same bracket.

[0017] A chair cushion assembly device applies the above-mentioned chair cushion assembly method.

[0018] The beneficial effects of the technical solutions of the present application are that the first threaded hole of the first frame and the second threaded hole of the second frame of the chair cushion are one-to-one corresponding and coaxial, so that the screw can be vertically screwed into the first frame and the second frame to fix, greatly reducing the assembly difficulty of the first frame and the second frame, and improving the assembly efficiency of the chair cushion; the upper die and the lower die shape the first frame and the second frame, so that the first frame and the second frame are more close to the design requirements when located between the upper die and the lower die, and the first frame and the second frame are fixed by the plurality of screws in the upper die and the lower die, and the plurality of screws are arranged along the edges of the first frame and the second frame, so that even after the upper die and the lower die are separated, the first frame and the second frame still maintain the state between the upper die and the lower die, so that the assembled chair cushion meets the design requirements, avoids interference between the chair cushion and other components of the chair, and reduces the overall installation difficulty of the chair. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a chair cushion assembly method and device;

[0020] Figure 2 It is a connection schematic diagram of a workbench, a screwing device, a lower shaping device and an upper shaping device;

[0021] Figure 3 It is a structural schematic diagram of automatic screw locking Figure 1 ;

[0022] Figure 4 It is a structural schematic diagram of automatic screw locking Figure 2 ;

[0023] Figure 5 It is a connection schematic diagram of the upper shaping device and the lower shaping device;

[0024] Figure 6 It is a structural schematic diagram of the lower shaping device Figure 1 ;

[0025] Figure 7 It is a structural schematic diagram of the lower shaping device Figure 2 ;

[0026] Figure 8 It is a structural schematic diagram of the lower die Figure 1 ;

[0027] Figure 9 It is a structural schematic diagram of the lower die Figure 2 ;

[0028] Figure 10 It is a connection schematic diagram of the lower die and the first frame;

[0029] Figure 11 It is a structural schematic diagram of the first frame Figure 1 ;

[0030] Figure 12 Structure diagram of the first frame Figure 2 ;

[0031] Figure 13 Structure diagram of the upper shaping device

[0032] Figure 14 Installation diagram of the upper die

[0033] Figure 15 Connection diagram of the second frame and the upper die

[0034] Figure 16 Structure diagram of the upper die Figure 1 ;

[0035] Figure 17 Structure diagram of the upper die Figure 2 ;

[0036] Figure 18 Structure diagram of the second frame Figure 1 ;

[0037] Figure 19 Structure diagram of the second frame Figure 2 .

[0038] Reference signs: 1, rack; 2, workbench; 21, through hole

[0039] 3, screwing device; 30, electric screwdriver; 31, third support; 32, screw feeder; 321, fourth support; 33, third motor; 331, second sliding rail; 332, second sliding block; 34, longitudinal mounting seat; 35, fourth motor; 351, third screw rod; 352, third sliding block; 36, transverse mounting seat; 37, fifth motor; 371, fourth screw rod; 372, fourth sliding block; 38, vertical mounting seat; 39, sixth motor; 391, third mounting plate; 392, second speed reducer

[0040] 4, lower shaping device; 41, first supporting plate; 411, first sliding block; 412, first sliding rail; 413, first nut; 42, first mounting plate; 43, lower die; 431, first forming block; 432, second forming block; 433, third forming block; 434, fourth forming block; 435, first cavity; 436, first pressure relief groove; 44, first motor; 441, bearing seat; 45, second motor; 451, small gear; 452, large gear; 453, first speed reducer; 47, first detection assembly; 48, second triggering assembly; 49, first triggering assembly

[0041] 5, upper shaping device; 51, top plate; 52, second supporting plate; 53, second mounting plate; 531, first avoiding hole; 54, upper die; 541, fifth forming block; 542, sixth forming block; 543, seventh forming block; 544, eighth forming block; 545, second avoiding hole; 546, second cavity; 547, second pressure relief groove; 55, first air cylinder; 56, second air cylinder; 561, second support; 562, detector; 57, bearing; 58, guide column; 59, guide sleeve;

[0042] 6, first frame; 61, first threaded hole; 7, second frame; 71, second threaded hole. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0048] The orientation described in the following embodiments is based on Figure 1 the orientation shown in the drawings, Figure 1 In the present application, the position of the workbench 2 is lower, the position of the transverse mounting seat 36 is upper, and the position of the screw feeder is left.

[0049] In the present embodiment, the left-right direction is the transverse direction, the front-rear direction is the longitudinal direction, and the up-down direction is the vertical direction. Embodiment

[0050] A chair cushion, as shown in Figure 11 , Figure 12 , Figure 18 and Figure 19 The chair cushion comprises a first frame 6 and a second frame 7, a plurality of first threaded holes 61 are formed on the first frame 6, the plurality of first threaded holes 61 are arranged along the edge of the first frame 6, a plurality of second threaded holes 71 are formed on the second frame 7, the plurality of second threaded holes 71 are arranged along the edge of the second frame 7, and the plurality of first threaded holes 61 and the plurality of second threaded holes 71 correspond one by one.

[0051] A chair cushion assembly device, as shown in Figures 1-19 The chair cushion assembly device comprises a lower die 43 and an upper die 54, the upper die 54 is arranged above the lower die 43 in a lifting manner, as shown in Figure 8 , Figure 9 and Figure 10 The upper surface of the lower die 43 is arc-shaped, the front and rear ends of the lower die 43 are upwardly curved, and the upper surface of the lower die 43 is provided with a first cavity 435 matched with the first frame 6; as shown in Figure 15 , Figure 17 The lower surface of the upper die 54 is arc-shaped, the front and rear ends of the upper die 54 are downwardly curved, and the lower surface of the upper die 54 is provided with a second cavity 546 matched with the second frame 7, the lower surface of the upper die 54 is matched with the upper surface of the lower die 43, and the upper die 54 is provided with a plurality of second avoiding holes 545, the positions of the plurality of second avoiding holes 545 correspond to the plurality of second threaded holes 71 of the second frame 7.

[0052] The method for assembling the chair cushion by using the chair cushion assembly device is as follows: step 1), placing the first frame 6 in the first cavity 435 of the lower mold 43, and placing the second frame 7 on the first frame 6 to preliminarily position the first frame 6 and the second frame 7;

[0053] Step 2), the upper mold 54 is lowered to press the second frame 7 and the first frame 6, and the second frame 7 and the first frame 6 are deformed after being pressed, so that the second frame 7 gradually matches the second cavity 546, the first frame 6 gradually matches the first frame 6, and the corresponding first threaded hole 61 and second threaded hole 71 tend to be coaxial; wherein, since the lower surface of the upper mold 54 is an arc surface, the upper mold 54 can gradually contact the second frame 7 during the lowering process, and the upper mold 54 can continuously adjust the relative position of the second frame 7 and the first frame 6 during the gradual contact of the upper mold 54 and the second frame 7; and when the second frame 7 is sunk into the second cavity 546 of the upper mold 54, the edge of the second frame 7 still protrudes from the second cavity 546, and during the process of completing the buckling of the upper mold 54 and the lower mold 43, the second frame 7 gradually deforms, the edge of the second frame 7 gradually inserts into the first cavity 435 of the lower mold 43, and the edge of the second frame 7 abuts against the first frame 6;

[0054] Step 3), after the upper mold 54 and the lower mold 43 are buckled, a plurality of screws are used to fix the first frame 6 and the second frame 7; wherein, during the installation of the screws, the screws pass through the second avoiding hole 545 of the upper mold 54 first, and then the screws are screwed into the second threaded hole 71 of the second frame 7 and the first threaded hole 61 of the first frame 6;

[0055] Step 4), after the first frame 6 and the second frame 7 are fixed, the upper mold 54 and the lower mold 43 are separated, and the assembled upper mold 54 and lower mold 43 are taken out.

[0056] In this way, the first threaded hole 61 of the first frame 6 and the second threaded hole 71 of the second frame 7 are one-to-one corresponding and coaxial, and then the screws can vertically fix the first frame 6 and the second frame 7, greatly reducing the installation difficulty of the first frame 6 and the second frame 7 and improving the assembly efficiency of the chair cushion; and since the first frame 6 and the second frame 7 are fixed by a plurality of screws, and the plurality of screws are arranged along the edges of the first frame 6 and the second frame 7, even if the upper and lower molds 43 are separated, the first frame 6 and the second frame 7 still maintain the state in the mold, so that the assembled chair cushion meets the design requirements, avoids interference between the chair cushion and other components of the chair, and reduces the overall installation difficulty of the chair.

[0057] In the embodiment, in the step 1), the first frame 6 is placed on the lower mold 43, the second frame 7 is placed above the first frame 6, and then the second frame 7 is manually moved to make the second threaded holes 71 of the second frame 7 correspond to the first threaded holes 61 of the first frame 6 one by one, thereby completing the rough positioning of the first frame 6 and the second frame 7.

[0058] In the embodiment, as shown in Figure 5 、 Figure 8 、 Figure 15 and Figure 16 , the front and rear sides of the lower mold 43 are protruded, and the left and right sides of the lower mold 43 are concave downward; the left and right sides of the upper mold 54 are protruded downward, and the front and rear sides of the upper mold 54 are concave upward; in the step 1), when the first frame 6 is placed on the lower mold 43, the front and rear sides of the lower mold 43 abut against the first frame 6, the front and rear sides of the lower mold 43 support the first frame 6, and the middle part of the first frame 6 is in a suspended state; in the step 2), during the downward movement of the upper mold 54, the left and right sides of the upper mold 54 first abut against the left and right sides of the second frame 7, the second frame 7 transmits the pressure to the left and right sides of the first frame 6, the first frame 6 is deformed under the pressure, the middle part of the first frame 6 protrudes downward, the front and rear sides of the first frame 6 are raised upward, the upper mold 54 continues to move downward, and the first frame 6 gradually moves downward into the first cavity of the lower mold 43; in the step 3), after the upper mold 54 and the lower mold 43 are buckled, the first frame 6 matches the first cavity, the lower half of the second frame 7 is inserted into the first cavity, the lower half of the second frame 7 matches the first cavity, the first frame 6 and the second frame 7 are attached, and the first threaded holes 61 of the first frame 6 and the second threaded holes 71 of the second frame 7 are coaxial.

[0059] In the embodiment, as shown in Figure 1 and Figure 2 , the assembly equipment of the chair cushion further comprises a rack 1, a workbench 2, a screw driving device 3, a lower shaping device 4 and an upper shaping device 5, the lower shaping device 4 comprises the lower mold 43, the upper shaping device 5 comprises the upper mold 54, the lower mold 43 and the upper mold 54 are both installed on the workbench 2, the workbench 2 is fixed on the rack, the screw driving device 3 comprises an electric screwdriver, the electric screwdriver moves above the workbench 2, picks up the screws one by one, and screws the screws into the second threaded holes 71 and the first threaded holes 61. In this way, the assembly efficiency of the chair cushion is further improved.

[0060] In the embodiment, as shown in Figure 8 、 Figure 9 and Figure 10As shown, the first frame 6 is provided with a first pressure relief groove 436 in the first cavity 435. Figure 15 and Figure 16 As shown, the second cavity 546 is provided with a second pressure relief groove 547; in the step 1), after the first frame 6 is placed in the first cavity 435, the first pressure relief groove 436 is located below the first frame 6; in the step 3), after the upper die 54 and the lower die 43 are buckled, the second pressure relief groove 547 buckles above the second frame 7. In this way, the first frame 6 and the second frame 7 can be prevented from being broken or crushed due to excessive deformation during the deformation process.

[0061] In the embodiment, the lower die 43 is formed by splicing a plurality of forming blocks, and the upper die 54 is formed by splicing a plurality of forming blocks. In this way, the difficulty of manufacturing the lower die 43 can be reduced, and the manufacturing cost of the mold can be reduced. Specifically, as shown in Figures 8-10 As shown, the lower die 43 includes a first forming block 431, a second forming block 432, a third forming block 433 and a fourth forming block 434 connected in sequence, and the first forming block 431, the second forming block 432, the third forming block 433 and the fourth forming block 434 are all provided with forming surfaces, and the forming surfaces on the first forming block 431, the second forming block 432, the third forming block 433 and the fourth forming block 434 are spliced to form the first cavity 435. As shown in Figures 15-17 As shown, the upper die 54 includes a fifth forming block 541, a sixth forming block 542, a seventh forming block 543 and an eighth forming block 544 connected in sequence, and the first forming block 431, the second forming block 432, the third forming block 433 and the eighth forming block 544 are all provided with forming surfaces, and the forming surfaces on the first forming block 431, the second forming block 432, the third forming block 433 and the eighth forming block 544 are spliced to form the second cavity 546.

[0062] In the embodiment, as shown in Figures 5-7 As shown, the lower die 43 is installed on the workbench 2 in a longitudinally sliding manner; specifically, the lower die setting device 4 further includes a first supporting plate 41, the first supporting plate 41 is slidingly installed on the workbench 2, the first supporting plate 41 can slide forward and backward, and the lower die 43 is installed on the first supporting plate 41; in the above step 1), after the lower die 43 is driven by the supporting plate to move forward, the first frame 6 is placed in the first cavity 435 of the lower die 43, then the second frame 7 is placed on the second frame 7, and then the lower die 43, the first frame 6 and the second frame 7 are driven by the first supporting plate 41 to move backward, so that the lower die 43, the first frame 6 and the second frame 7 are located below the second cavity 546 of the upper die 54. In this way, the worker does not need to operate between the upper die 54 and the lower die 43, and the safety of the chair seat assembly is improved.

[0063] Further preferably, two first sliding rails 412 are fixedly installed on the workbench 2, the first sliding rails 412 are arranged left and right, two groups of first sliding blocks 411 are fixedly installed on the first supporting plate 41, and the two groups of first sliding blocks 411 are installed on the two first sliding rails 412 respectively; two bearing seats 441 are arranged on the workbench 2, a first lead screw is arranged between the two bearing seats 441, the first lead screw is rotatably connected with the two bearing seats 441, the first motor 44 is installed on one of the bearing seats 441, the output end of the first motor 44 is connected with one end of the first lead screw, the first nut 413 is threadedly connected with the first lead screw, and the first nut 413 is fixedly connected with the first supporting plate 41; in the above step 1), before the first frame 6 and the second frame 7 are placed on the lower mold 43, the first motor 44 drives the first lead screw to rotate, the first lead screw drives the first nut 413 to move forward, the first nut 413 drives the first supporting plate 41 to move forward, and the first supporting plate 41 drives the lower mold 43 to move away from the upper mold 54; when the lower mold moves to the top end of the stroke, the first frame 6 and the second frame 7 are placed on the lower mold 43, then the first motor 44 drives the first lead screw to rotate, the first lead screw drives the first nut 413 to move backward, the first nut 413 drives the first supporting plate 41 to move backward, and the first supporting plate 41 drives the lower mold 43 to move backward to below the upper mold 54; in the above step 4), after the upper mold 54 and the lower mold 43 are separated, the first motor 44 drives the first lead screw to rotate, the first lead screw drives the first nut 413 to move forward, the first nut 413 drives the first supporting plate 41 to move forward, and then the chair cushion that has been assembled on the lower mold 43 is taken out. In this way, the sliding stroke of the lower mold 43 is controlled in an electric control mode, and the control of the lower mold 43 is more accurate.

[0064] Further preferably, the first lead screw, the first motor 44 and the two bearing seats 441 are located below the workbench 2, the first supporting plate 41 is located above the workbench 2, a through hole 21 is formed in the workbench 2, and the first nut 413 passes through the through hole 21 from below to above and is fixedly connected with the bottom surface of the first supporting plate 41. In this way, the structure of the equipment is more compact, and the space of the rack is more reasonably utilized.

[0065] In order to make the equipment be used for assembling chair cushions of different specifications and different shapes, in the embodiment, as shown in Figures 5-7 the lower shaping device 4 further comprises a first mounting plate 42, and the plurality of forming blocks of the lower mold 43 are fixedly installed on the first mounting plate 42; as shown in Figures 13-15As shown, the upper shaping device 5 comprises a first support, a second mounting plate 53 being slidably arranged on the first support, a plurality of forming blocks of the upper die 54 being fixedly arranged on the bottom of the second mounting plate 53, a plurality of first avoiding holes 531 being arranged on the second mounting plate 53, and the positions of the plurality of first avoiding holes 531 corresponding to the positions of the plurality of second avoiding holes 545. In this way, the appropriate die can be made according to the shape of the frame, and the upper die 54 and the lower die 43 are separately arranged on the first mounting plate 42 and the second mounting plate 53, so that the device can be used to produce frames of various specifications and shapes.

[0066] In order to facilitate the installation of the screws, in the embodiment, the upper die 54 and the lower die 43 are rotatably arranged on the workbench 2. In the above step 3), the screws are screwed into the first threaded holes 61 and the second threaded holes 71 located at the front side. When it is needed to install the screws in the first threaded holes 61 and the second threaded holes 71 at other positions, the lower die 43 and the upper die 54 are rotated to move the first threaded holes 61 and the second threaded holes 71, which are not screwed, to the front side. Specifically, as shown in Figure 5 、 Figure 6 and Figure 7 , in the lower shaping device 4, the first mounting plate 42 is rotatably arranged on the first supporting plate 41, and the first supporting plate 41 is provided with a second motor 45 for driving the rotation of the first mounting plate 42; as shown in Figure 13 and Figure 14 , in the upper shaping device 5, the second mounting plate 53 is rotatably arranged on the second supporting plate 52 through a bearing 57, and the second supporting plate 52 is slidably arranged on the first support; after the upper die 54 and the lower die 43 are buckled in the above step 2), the upper surface of the lower die 43 and the lower surface of the upper die 54 are both arc-shaped, so that the upper die 54 and the lower die 43 are locked in the circumferential direction; in the above step 3), during the locking of the screws in the first threaded holes 61 and the second threaded holes 71 of the first frame 6 and the second frame 7, the second motor 45 drives the rotation of the first mounting plate 42, the first mounting plate 42 drives the rotation of the lower die 43, and the lower die 43 drives the rotation of the upper die 54, so as to adjust the positions of the first threaded holes 61 and the second threaded holes 71, which are about to be screwed, to the front side, thereby shortening the moving path of the electric screwdriver and improving the assembly efficiency of the chair cushion.

[0067] Further preferably, as shown in Figure 5 、 Figure 6 and Figure 7As shown, in the lower shaping device 4, the first mounting plate 42 is rotatably installed at the bottom of a large gear 452, and the output end of the second motor 45 is installed with a small gear 451, and the small gear 451 and the large gear 452 are in meshing transmission. By setting up the stroke reduction mechanism of the large gear 452 and the small gear 451, the control of the second motor 45 can be more accurate. Further, the second motor is connected to the small gear through the first speed reducer 453. The control of the small gear is more accurate, and the electric screwdriver interferes with the mold.

[0068] Further preferably, as shown in Figure 13 and Figure 14 As shown in the upper shaping device 5, the first support includes a top plate 51, the top plate 51 is located above the second supporting plate 52, the top plate 51 and the workbench 2 are fixedly connected through four guide columns 58, four guide sleeves 59 are sleeved on the four guide columns 58, and the four guide sleeves 59 are fixedly connected with the second supporting plate 52. The first air cylinder 55 is installed on the top plate 51, the first air cylinder 55 is vertically arranged, and the extension end of the first air cylinder 55 is connected with the second supporting plate 52; in the step 2), the first air cylinder 55 drives the second supporting plate 52 to move downward, the second supporting plate 52 drives the second mounting plate 53 to move downward, the second mounting plate 53 drives the upper mold 54 to move downward, and the upper mold 54 and the lower mold 43 are buckled; in the step 4), the first air cylinder 55 drives the second supporting plate 52 to move upward, the second supporting plate 52 drives the second mounting plate 53 to move upward, the second mounting plate 53 drives the upper mold 54 to move upward, and the upper mold 54 and the lower mold 43 are separated, the first motor drives the first supporting plate to move forward, the first supporting plate drives the lower mold to move forward, and then the assembled chair cushion is taken out from the lower mold 43. In this way, the pressure of the upper mold 54 and the lower mold 43 can be better controlled, and the control accuracy of the equipment can be improved.

[0069] In order to improve the control accuracy of the equipment, in the embodiment, as shown in Figure 6 and Figure 7 The lower shaping device 4 further comprises a first detection assembly 47, a first trigger assembly 49 and a second trigger assembly 48, the first detection assembly 47 is installed on the first mounting plate 42, the first trigger assembly 49 is installed on the output end of the first motor 44, and the second trigger assembly 48 is installed on the first mounting plate 42. The first trigger assembly 49 and the second trigger assembly 48 can trigger the first detection assembly 47. In this way, the equipment can detect the output speed of the first motor 44 and the angle of rotation of the lower mold 43. In other embodiments, the second trigger assembly can have multiple second detection assemblies arranged around the edge of the first mounting plate 42.

[0070] In order to improve the installation accuracy of the mold, in the embodiment, as shown in Figure 13 and Figure 14As shown, the upper shaping device 5 further comprises a detector 562, the second mounting plate 53 is provided with a plurality of first positioning holes, the upper die 54 is provided with a plurality of second positioning holes, the plurality of first positioning holes and the plurality of second positioning holes correspond to each other and are in communication, the second mounting plate 53 is provided with the detector 562 which can be lifted and lowered, the detector 562 can be inserted into the first positioning hole and the second positioning hole, and then the installation position of each forming block of the upper die 54 is detected. Further, the second supporting plate 52 is provided with a second bracket 561, the second bracket 561 is provided with a second cylinder 56, the second cylinder 56 is vertically arranged, the second supporting plate 52 is provided with a plurality of third positioning holes, the detector 562 is arranged on the telescopic end of the second cylinder 56, the second cylinder 56 can drive the detector 562 to move downward, so that the detector 562 is inserted into the first positioning hole and the second positioning hole. The plurality of second positioning holes are arranged on the plurality of forming blocks of the upper die 54.

[0071] In order to improve the automation degree of the equipment and reduce the time of the chair cushion, in the embodiment, as shown in Figures 2 to 4As shown, the screwing device 3 comprises a screw feeder 32, a transverse moving assembly, a longitudinal moving assembly and a vertical moving assembly, wherein the electric screwdriver 30 is rotatably installed on the vertical moving assembly, the vertical moving assembly can drive the electric screwdriver 30 to move up and down, the vertical moving assembly is installed on the transverse moving assembly, the transverse moving assembly can drive the longitudinal moving assembly to move left and right, the longitudinal moving assembly is installed on the transverse moving assembly, the longitudinal moving assembly can drive the transverse moving assembly to move forward and backward, the transverse moving assembly is installed on the third support 31, and the screw feeder 32 is installed on the third support 31 through a fourth support 321, and the screw feeder 32 can automatically feed and send the screws to the specified position. In the above step 3), after the upper die 54 and the lower die 43 are buckled, the transverse moving assembly, the longitudinal moving assembly and the vertical moving assembly drive the electric screwdriver 30 to move, so that the electric screwdriver 30 takes out the screws from the screw feeder 32, and then the transverse moving assembly, the longitudinal moving assembly and the vertical moving assembly drive the electric screwdriver 30 to move, so that the electric screwdriver 30 moves above a first avoiding hole 531 on the second mounting plate 53, and then the electric screwdriver 30 rotates and moves downward, after the electric screwdriver 30 drives the screws to be inserted into the first avoiding hole 531 of the second mounting plate 53 and the second avoiding hole 545 of the upper die 54 in turn, the electric screwdriver 30 rotates and screws into the second threaded hole 71 of the second frame 7 and the first threaded hole 61 of the first frame 6; then the electric screwdriver 30 repeats the above steps of taking out the screws from the screw feeder 32 and screwing the screws into the first frame 6 and the second frame 7, and a plurality of screws are screwed into the first threaded hole 61 and the second threaded hole 71 located on the front side one by one; when the first threaded hole 61 and the second threaded hole 71 located on the front side are screwed, the second motor 45 drives the second mounting plate 53 to rotate, the second mounting plate 53 drives the lower die 43 to rotate, since the upper die 54 and the lower die 43 are in the buckled state, the lower die 43 drives the upper die 54 to rotate when rotating, the upper die 54 and the lower die 43 drive the first frame 6 and the second frame 7 to rotate, and move the first threaded hole 61 and the second threaded hole 71 without screws to the front side; then the electric screwdriver 30 repeats the above steps of taking out the screws from the screw feeder 32 and screwing the screws into the first frame 6 and the second frame 7, and a plurality of screws are screwed into the first threaded hole 61 and the second threaded hole 71 located on the front side one by one; then the above rotating process of the upper die 54 and the lower die 43 is repeated, and the process of screwing the screws into the second threaded hole 71 and the first threaded hole 61 is repeated, so that the first frame 6 and the second frame 7 are finally locked.

[0072] In this embodiment, the specific structure of the screw feeder 32 can refer to the patent documents with publication numbers CN201099528Y, CN105563094A, CN214350661U and CN218578908U.

[0073] In this embodiment, as shown in Figure 1 and Figure 2 , the lower die 43 is moved forward to enable the third support 31 to pass out.

[0074] In this embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the longitudinal moving assembly includes two second sliding rails 331, which extend forward and backward, are arranged left and right, are both fixed on the top of the third support, and are both provided with a second sliding block 332. The third support 31 is also provided with a longitudinal mounting seat 34, which is fixed on the top of the third support 31 and is rotatably provided with a second lead screw. The longitudinal mounting seat 34 is provided with a third motor 33, which is in transmission connection with the second lead screw. The second lead screw is in threaded connection with one second sliding block 332. In this way, the third motor 33 controls the position of the first sliding block 411 in the longitudinal direction through the second lead screw, so as to change the position of the transverse moving assembly, the longitudinal moving assembly and the electric screwdriver 30.

[0075] Further preferably, the transverse moving assembly includes a transverse mounting seat 36, which is fixedly connected with the two second sliding blocks 332 at the left and right ends, is provided with a fourth motor 35, is rotatably provided with a third lead screw 351, and is in transmission connection with the fourth motor 35 and the third lead screw 351. The third lead screw 351 is in threaded connection with a third sliding block 352, which is in sliding connection with the transverse mounting seat 36. The vertical moving assembly is installed on the third sliding block 352.

[0076] Further preferably, the vertical moving assembly includes a vertical mounting seat 38, which is fixedly connected with the third sliding block 352. The vertical mounting seat 38 is provided with a fifth motor 37, is rotatably provided with a fourth lead screw 371, and is in threaded connection with a fourth sliding block 372. The fourth sliding block 372 is in sliding connection with the vertical mounting seat 38. The electric screwdriver 30 is installed on the fourth sliding block 372.

[0077] Further preferably, the fourth sliding block 372 is fixedly provided with a third mounting plate 391, which is provided with a sixth motor 39 and a second speed reducer 392. The sixth motor 39 is in transmission connection with the speed reducer. A fifth support is installed on the housing of the speed reducer. The electric screwdriver 30 is installed on the fifth support and is in transmission connection with the second speed reducer.

[0078] In the present application, the electric screwdriver 30 for installing the screws only needs to move at the front side of the mold, greatly reducing the moving path of the electric screwdriver 30, and improving the assembly efficiency of the chair cushion. Moreover, the first frame 6 and the second frame 7 are shaped by the upper mold 54 and the lower mold 43, and the edges of the first frame 6 and the edges of the second frame 7 are fixed by the plurality of screws. Not only the screws for connecting the first frame 6 and the second frame 7 can be vertically screwed therein, but also the first frame 6 and the second frame 7 fixed by the plurality of screws can be kept in the state in the mold, so that the assembled chair cushion is more in line with the design requirements.

[0079] In order to further reduce the production of finished products, the materials of the upper mold 54 and the lower mold 43 can be plastic, and can also be acrylic plates and other materials with higher hardness than the first frame 6 and the second frame 7. In this way, since the upper mold 54 and the lower mold 43 are composed of a plurality of shaped blocks, each shaped block can be engraved, and the hardness requirement of the mold in the present application is much lower than that of the mold for shaping, so that the mold material cost and processing cost in the present application are lower.

[0080] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments without departing from the principles and spirit of the present application within the scope of the present application.

Claims

1. A method of assembling a chair cushion, characterized by: The chair cushion comprises a first frame (6) and a second frame (7), a plurality of first threaded holes (61) are formed on the first frame (6), the plurality of first threaded holes (61) are arranged along the edge of the first frame (6), a plurality of second threaded holes (71) are formed on the second frame (7), the plurality of second threaded holes (71) are arranged along the edge of the second frame (7), and the plurality of first threaded holes (61) and the plurality of second threaded holes (71) correspond one by one; An assembling device is adopted, the assembling device comprises a lower die (43) and an upper die (54), the upper die (54) is arranged above the lower die (43) in a liftable manner, the upper surface of the lower die (43) is provided with a first cavity (435) matched with the first frame (6); the lower surface of the upper die (54) is provided with a second cavity (546) matched with the second frame (7), a plurality of second avoiding openings (545) are formed on the upper die (54), the positions of the plurality of second avoiding openings (545) correspond to the plurality of second threaded holes (71) of the second frame (7); and the assembling process of the chair cushion is as follows: Step 1), the first frame (6) is placed in the first cavity (435) of the lower die (43), and the second frame (7) is placed on the first frame (6), so that the first frame (6) and the second frame (7) are coarsely positioned; Step 2), the upper die (54) is lowered to press the second frame (7) and the first frame (6), the second frame (7) and the first frame (6) are deformed after being pressed, so that the second frame (7) gradually matches the second cavity (546), the first frame (6) gradually matches the first frame (6), and the corresponding first threaded hole (61) and second threaded hole (71) tend to be coaxial; Wherein, the upper die (54) gradually contacts the second frame (7) when being lowered, and the upper die (54) continuously adjusts the relative position of the second frame (7) and the first frame (6); when the upper die (54) and the lower die (43) are completely buckled, the upper half of the second frame (7) is sunk into the second cavity (546), the lower half of the second frame (7) is inserted into the first cavity (435), and the edge of the second frame (7) abuts against the first frame (6); Step 3), the first frame (6) and the second frame (7) are fixed by using a plurality of screws; wherein, when the screws are installed, the screws are screwed into the second threaded holes (71) of the second frame (7) and the first threaded holes (61) of the first frame (6); Step 4), after the first frame (6) and the second frame (7) are fixed, the upper die (54) and the lower die (43) are separated, and the assembled chair cushion is taken out.

2. A method of assembling a chair cushion according to claim 1, wherein: The first cavity (435) is provided with a first pressure relief groove (436).

3. The method of claim 1, wherein: The second cavity (546) is provided with a second pressure relief groove (547).

4. The method of claim 1, wherein: The upper die (54) and the lower die (43) are formed by a plurality of shaped blocks.

5. The method of claim 1, wherein: The lower die (43) is rotatably installed on the workbench (2), and the upper die (54) is liftable installed on the workbench (2), and the upper die (54) can rotate with the lower die (43).

6. The method of claim 1, wherein: The lower die (43) is slidably mounted on the worktable (2), and the upper die (54) is liftably mounted on the worktable (2).

7. The method of claim 1, wherein: The assembling device further comprises a screwing device (3) capable of arranging screws and screwing the screws into the second threaded hole (71) and the first threaded hole (61) through an electric screwdriver (30).

8. A method of assembling a chair cushion according to claim 7, wherein: The screwing device comprises a screw feeder (32) for arranging the screws, and the electric screwdriver (30) is capable of picking up the screws on the screw feeder (32) and then screwing the picked-up screws into the second threaded hole (71) and the first threaded hole (61).

9. A method of assembling a chair cushion according to claim 8, wherein: The screw feeder (32) and the electric screwdriver (30) are mounted on the same bracket.

10. A chair cushion assembly apparatus, characterized by: A method for assembling a chair cushion according to any one of claims 1-9.

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