How to cover a chair frame with a stretch mesh

Abstract

The present invention discloses a method for wrapping a chair frame with a stretching net, comprising the following steps: 1) laying the stretching net flatly under the chair frame; 2) limiting the chair frame in six directions (up, down, left, right, front, and back), and squeezing a second protrusion on the chair frame to deform the chair frame; 3) pressing the deformed chair frame against the laid stretching net to tighten the chair frame and the stretching net; 4) crossing the ends of a steel wire rope, then pulling the wire rope to reduce the length of the steel wire rope on the stretching net, so that the stretching net wraps around the edge of the deformed chair frame, thereby tightening the net once, wherein the steel wire rope is close to the mounting surface of the chair frame; and 5) securing the ends of the steel wire rope at the intersection, then releasing the chair frame to restore it, thereby tightening the stretching net a second time. The above method allows for quick installation of the chair frame and the stretching net, and allows the stretching net to be tightly wrapped around the chair frame.

Description

Technical Field

[0001] The invention relates to the field of home furnishings, and in particular to a method for covering a chair frame with a stretching net. Background Art

[0002] In the prior art, during the production process of mesh chairs, it is necessary to manually tighten the mesh, and then use a nail gun to nail the edges of the mesh to the mesh chair frame along the edges of the mesh chair frame; however, this working method is not only inefficient, but also due to limited manpower, the supporting effect of the mesh is often unsatisfactory, and the edges of the mesh are irregular, which affects the overall image of the chair. Moreover, if the installation position of the mesh deviates greatly, rework is required, especially for leather fabrics, which results in a large cost loss.

[0003] Patent document with publication number CN112932139A discloses a chair and a device and method for installing fabric on a chair frame. The specification discloses a method for installing fabric on a chair frame, and the specific steps are as follows: Step 1: Install a steel wire rope on the fabric and form a circle along the edge of the fabric; Step 2: Place the chair frame in the center of the workbench and preliminarily install the fabric on the chair frame; Step 3: Clamp the left and right sides of the chair frame by two pressing components and force the chair frame to produce pre-deformation; Step 4: Wrap the steel wire rope around the outer wall of the chair frame by two stretching components at least once, and make a first component at least partially enter the second sub-channel; and another first component at least partially enter the third sub-channel; Step 5: The stretching component releases the steel wire rope, and then the pressing component releases the chair frame so that the chair frame rebounds, thereby forcing the first component in the second sub-channel to press against the step surface between the first sub-channel and the second sub-channel; and the first component in the third sub-channel to press against the step surface between the third sub-channel and the fourth sub-channel.

[0004] The following problems exist in the prior art: 1. Before the fabric is installed, the chair frame is not completely fixed, so when the chair frame is deformed, the chair frame may move and jump upward; 2. Before the chair is deformed, the fabric needs to be preliminarily installed on the chair frame, so that the two clamping components force the chair frame to press against the part of the fabric pre-installed on the chair frame when it is deformed, which will affect the degree of tension of the fabric and directly affect the supporting strength of the fabric, reducing the user experience; 3. The wire rope is wrapped around the outer wall of the chair frame, which requires the wire rope to be tightened on the side wall of the chair frame, which places higher requirements on the stretching component that pulls the wire rope to move, and because the clamping component presses against part of the fabric, this will inevitably affect the tightening strength of the wire rope. Summary of the Invention

[0005] In order to solve the problems in the prior art, the purpose of the present invention is to provide a method for covering a chair frame with a stretch net, so that the chair frame and the stretch net can be quickly installed, so that the stretch net can be tightly wrapped on the chair frame, and the stretch net is not easy to fall off the chair frame, and the stretch net wrapped on the chair frame has a better supporting effect.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a method for covering a chair frame with a stretching net, the chair frame comprising a first support portion, a second support portion, a third support portion, and a fourth support portion, wherein the first support portion, the second support portion, the third support portion, and the fourth support portion are sequentially terminated and downwardly enclosed to form a frame structure; the first support portion, the second support portion, the third support portion, and the fourth support portion are all arc-shaped, wherein the first support portion and the second support portion are both downwardly convex, and the third support portion and the fourth support portion are upwardly convex; a side surface of the chair frame covered with the stretching net is a supporting surface, and a side surface opposite to the supporting surface is a mounting surface, wherein a first protrusion is raised on the mounting surface, the first protrusion is arranged around an inner hole of the chair frame, a second protrusion is raised on the first protrusion, the second protrusion is arranged around the inner hole of the first protrusion, and a plurality of connecting seats are raised on the first protrusion for the inner hole of the first protrusion; the stretching net comprises a stretching net body, and a steel wire rope is passed through the stretching net body, wherein both ends of the steel wire rope extend from the stretching net body, and both ends of the steel wire rope are fixed with limit blocks;

[0007] The specific steps for covering the chair frame with a stretch mesh are as follows:

[0008] Step 1) Lay the mesh flat under the chair frame;

[0009] Step 2) The chair frame is limited in six directions, including up, down, left, right, front, and back, and the second raised portion on the chair frame is squeezed to deform the chair frame;

[0010] Step 3) Press the deformed chair frame onto the flattened mesh to tighten the chair frame and mesh.

[0011] Step 4) Cross the ends of the wire ropes and pull them to reduce the length of the wire ropes on the tensioning net, tightening the edges of the tensioning net and wrapping the tensioning net around the edges of the deformed chair frame, tightening the net all at once. The wire ropes are positioned close to the mounting surface of the chair frame.

[0012] Step 5) Use a nail gun to secure the ends of the wire ropes at their intersection, then release the chair frame. Once the chair frame returns to its original shape, tighten the mesh again; the outline formed by the wire ropes is smaller than the outline of the chair frame.

[0013] Preferably, in step 1), the mesh is laid flat on the positioning mold and covers the placement slot opened on the top of the positioning mold; in step 3), the chair frame presses the mesh and moves it into the placement slot, thereby making the edge of the mesh curl upward; the placement slot matches the chair frame.

[0014] Preferably, in step 2), the lower portion of the vertically arranged front positioning plate and the lower portion of the rear positioning plate both extend from the inner side of the chair frame, and the side walls of the front positioning plate and the side walls of the rear positioning plate both abut against the inner wall of the chair frame; the raised front positioning portion on the front positioning plate and the raised rear positioning portion on the rear positioning plate both abut against the support surface of the chair frame, thereby supporting the first support portion and the third support portion of the chair frame from bottom to top; and the transversely arranged fourth connecting plate presses the second support portion and the second protrusion on the fourth support portion on the chair frame from top to bottom, causing the chair frame to deform.

[0015] Preferably, there are two front positioning plates, and the two front positioning plates are symmetrically arranged, and the rear positioning plate is located on the rear side of the middle position of the two front positioning plates.

[0016] Preferably, two left and right pressing blocks are fixedly mounted on the fourth connecting plate, and both pressing blocks have raised limiting portions. In step 2), the second raised portion on the second supporting portion and the fourth supporting portion is located between the two limiting portions of the two pressing blocks, thereby limiting the left and right movement of the chair frame.

[0017] Preferably, in step 4), the limit blocks at both ends of the wire rope are respectively installed on the extended telescopic ends of the two pulling cylinders. When the telescopic ends retract into the cylinder bodies of the pulling cylinders, the wire rope tightens the edge of the stretched net and wraps the edge of the chair frame.

[0018] Preferably, in step 4), the two pulling cylinders are arranged obliquely and pull the two ends of the wire rope upward.

[0019] Preferably, in step 4), the parts of the two ends of the wire rope extending from the stretching net body respectively abut against the outer circumferential surfaces of the two guide wheels, and the position of the guide wheels is lower than the lowest point of the telescopic end stroke of the pulling cylinder, so that the intersection of the two ends of the wire rope is close to the stretching net body.

[0020] Preferably, a pulling block is fixedly mounted on the telescopic end of the pulling cylinder, and a pulling hole matching the end portion of the wire rope is opened on the pulling block; in step 4), the limit block on the wire rope is installed in the pulling hole.

[0021] Preferably, there are multiple drawing holes.

[0022] The beneficial effects of the technical solution of the present invention are as follows: in the above method, before the tensioning net is installed on the chair frame, the chair frame is restricted in all six directions (front, back, left, right, up, and down), making the overall movement of the chair frame more stable; when installing the tensioning net, the above method reduces the step of pre-installing the tensioning net on the chair frame, thereby improving the assembly efficiency of the chair frame and the tensioning net. When the steel wire rope is tightened, the tensioning net can be moved as a whole and cover the supporting surface of the chair frame, thereby providing a better supporting effect of the tensioning net; and during the process of installing the tensioning net on the chair frame, the chair frame moves down into the placement groove of the positioning mold. After the chair frame contacts the placement groove, the chair frame can be deformed as a whole, so that the chair frame with the tensioning net installed better meets the design requirements; in the above method, the tensioning net is tightened twice during the installation process, so that the tensioning net on the chair frame has a better supporting effect; wherein the tensioning net not only covers the supporting surface of the chair frame but also covers the edge of the chair frame, thereby making it difficult for the assembled tensioning net to fall off the chair frame, thereby increasing the life of the chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the chair frame mesh stretching equipment;

[0024] Figure 2 Schematic diagram of the connection structure between the deformation device and the covering device;

[0025] Figure 3 Schematic diagram of the connection structure between the second bracket and the deformation device Figure 1 ;

[0026] Figure 4 Schematic diagram of the connection structure between the second bracket and the deformation device Figure 1 ;

[0027] Figure 5 Schematic diagram of the connection structure between the second bracket and the deformation device Figure 1 ;

[0028] Figure 6 This is a structural diagram of the first pulling cylinder in a retracted state;

[0029] Figure 7 This is a structural diagram of the second pulling cylinder in an extended state;

[0030] Figure 8 Schematic diagram of the structure of the second pull-out block;

[0031] Figure 9 It is a schematic diagram of the connection structure between the positioning mold and the mesh chair frame;

[0032] Figure 10 It is a structural diagram of the positioning mold;

[0033] Figure 11Schematic diagram of the structure of the mesh chair frame Figure 1 ;

[0034] Figure 12 Schematic diagram of the structure of the mesh chair frame Figure 2 ;

[0035] Figure 13 Schematic diagram of the structure of the wire rope;

[0036] Figure 14 Schematic diagram of the structure of the stretched net.

[0037] Reference numerals: 1, workbench; 11, first bracket; 2, first cylinder; 21, first mounting plate; 22, second bracket; 23, fourth guide post; 3, second mounting plate; 31, ninth connecting plate; 32, first positioning hole; 33, second positioning hole; 34, mounting portion; 40, second connecting plate; 41, first pressure block; 411, first limiting portion; 412, seventh connecting plate; 42, second pressure block; 421, second limiting portion; 42 2. Eighth connecting plate; 43. First front positioning plate; 431. First front positioning portion; 432. First fixing plate; 433. First guide post; 44. Second front positioning plate; 441. Second front positioning portion; 442. Second fixing plate; 443. Second guide post; 45. Rear positioning plate; 451. Rear positioning portion; 452. Third connecting plate; 46. Second cylinder; 462. First mounting seat; 47. Fourth connecting plate; 471. Third positioning hole ; 472, fourth positioning hole; 48, third guide post; 49, first connecting plate; 51, first pulling cylinder; 512, fourth mounting seat; 52, first pulling block; 521, first pulling hole; 53, second pulling cylinder; 532, fifth mounting seat; 54, second pulling block; 541, second pulling hole; 5411, second driving part; 5412, second avoidance part; 55, sixth connecting plate; 56, first guide wheel; 57, first Second guide wheel; 58, third mounting seat; 59, third mounting plate; 6, mesh chair frame; 61, first supporting part; 62, second supporting part; 63, third supporting part; 64, fourth supporting part; 65, first protrusion; 66, second protrusion; 67, mounting surface; 68, supporting surface; 69, positioning box; 7, positioning mold; 71, placement slot; 8, electric control box; 9, mesh; 91, mesh body; 92, wire rope; 93, limit block. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise explicitly specified.

[0041] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] The orientations described in the following embodiments are Figure 1 shall prevail. Figure 1 In the figure, the position of the first cylinder is taken as the top, the position of the workbench is taken as the back, the position of the electric control cabinet 8 is taken as the left, and the side opposite to the electric control cabinet is taken as the right, and then the front and back are discussed. Example

[0044] A method of covering a chair frame with a stretch mesh, such as Figure 11-14As shown, the chair frame includes a first support portion 61, a second support portion 62, a third support portion 63 and a fourth support portion 64, wherein the first support portion 61, the second support portion 62, the third support portion 63 and the fourth support portion 64 are successively closed downward to form a frame structure; the first support portion 61, the second support portion 62, the third support portion 63 and the fourth support portion 64 are all arc-shaped, wherein the first support portion 61 and the second support portion 62 are both convex downward, and the third support portion 63 and the fourth support portion 64 are convex upward; the side of the chair frame 6 covered with the stretching net 9 is the support surface 68, which is aligned with the support surface 6 The side opposite to 8 is a mounting surface 67, on which a first protrusion 65 is protruded, and the first protrusion 65 is arranged around the inner hole of the chair frame 6, and a second protrusion 66 is protruded on the first protrusion 65, and the second protrusion 66 is arranged around the inner hole of the first protrusion 65, and the first protrusion 65 is protruded with a plurality of connecting seats provided for the inner hole thereof; the tension net 9 includes a tension net body 91, and a steel wire rope 92 passing through the tension net body 91, with both ends of the steel wire rope 92 extending from the tension net body 91, and both ends of the steel wire rope 92 are fixed with limit blocks;

[0045] The specific steps of covering the stretch mesh 9 on the chair frame are as follows:

[0046] Step 1) Lay the mesh 9 flat under the chair frame 6;

[0047] Step 2) squeezing the second protrusion 66 on the chair frame 6 to deform the chair frame 6;

[0048] Step 3) Press the deformed chair frame 6 onto the flattened mesh 9 to press the chair frame 6 and the mesh 9 tightly together;

[0049] Step 4) Cross the ends of the steel wire rope 92 and pull the steel wire rope 92 to reduce the length of the steel wire rope 92 on the tension net 9, tightening the edge of the tension net 9 and wrapping the tension net 9 around the edge of the deformed chair frame 6, thereby tightening the tension net 9 once more.

[0050] Step 5) Use a nail gun to fix the two ends of the steel wire rope 92 at the intersection of the steel wire rope 92, and then release the chair frame 6. After the chair frame 6 returns to its original shape, the tension net 9 is tightened again.

[0051] With such arrangement, the stretch net can be quickly installed on the chair frame through the above method, and the stretch net is tightened twice, so that the stretch net on the chair frame has a better supporting effect.

[0052] A chair frame stretching assembly device using the above method, such as Figure 1-13As shown, it includes a workbench 1, a lifting device, a deformation device, a placement device and a covering device; wherein, the placement device includes a positioning mold 7, the positioning mold 7 is installed on the workbench 1, and the top of the positioning mold 7 is provided with a placement slot 71 that matches the mesh chair frame; the lifting device includes a first cylinder 2, a first bracket 11 and a second bracket 22, the first bracket 11 is fixed on the workbench 1, the first cylinder 2 is installed on the first bracket 11, the second bracket 22 is installed on the telescopic end of the first cylinder 2, and the second bracket 22 is located above the positioning mold 7; in the step 1), the stretched net 9 is spread flat on the positioning mold 7, and the placement slot 71 opened on the top of the positioning mold 7 is covered; in the step 3), the chair frame 6 presses the stretched net 9 and moves it into the placement slot, thereby making the edge of the stretched net 9 upturned. The deformation device includes a front positioning plate, a rear positioning plate 45 and a fourth connecting plate 47. The front positioning plate and the rear positioning plate 45 are arranged front and back. The front positioning plate is installed on the second bracket 22 in a manner that it can slide back and forth. The rear positioning plate 45 is fixed on the second bracket 22. The fourth connecting plate 47 is located between the front positioning plate and the rear positioning plate 45. The fourth connecting plate 47 is installed on the second bracket 22 in a manner that it can move up and down; the front positioning plate and the rear positioning plate 45 can support the front and rear ends of the net chair frame from the bottom to the top, and the fourth connecting plate 47 can press the left and right ends of the net chair frame from the top to the bottom to deform the frame; the covering device includes a first pulling cylinder 51 and a second pulling cylinder 53. The first pulling cylinder 51 and the second pulling cylinder 53 can respectively pull the two ends of the steel wire rope 92 extending from the tension net 9 so that the tension net 9 wraps the net chair frame 6. In step 2), the lower portion of the vertically arranged front positioning plate and the lower portion of the rear positioning plate 45 both extend from the inner side of the chair frame 6, and the side walls of the front positioning plate and the side walls of the rear positioning plate 45 both abut against the inner wall of the chair frame 6; the raised front positioning portion on the front positioning plate and the raised rear positioning portion on the rear positioning plate 45 both abut against the support surface 68 of the chair frame 6, thereby supporting the first support portion 61 and the third support portion 63 of the chair frame 6 from bottom to top; the transversely arranged fourth connecting plate 47 presses the second support portion 62 and the second protrusion 66 on the fourth support portion 64 on the chair frame 6 from top to bottom, causing the chair frame 6 to deform.

[0053] With such arrangement, when the net chair frame 6 is installed on the device, the distance between the front positioning plate and the rear positioning plate 45 is adjusted so that the front positioning plate and the rear positioning plate 45 are inserted into the interior of the net chair frame 6, so that the front positioning plate and the rear positioning plate 45 fix the front and rear ends of the net chair frame 6, and then the left and right ends of the net chair frame 6 are pressed down by the fourth connecting plate 47 to deform the net chair frame 6, so that net chair frames 6 of different specifications can be installed on the device. At the same time, due to the different specifications of the tensioning net 9, the lengths of the steel wire ropes 92 passed through the tensioning net 9 are different. However, the device can match the steel wire ropes 92 of different lengths by controlling the stroke of the cylinder, so that different models of net chairs and frames at different positions on the net chair can be assembled through the device, so that the present invention has extremely strong versatility and adaptability, and is convenient for assembling net chair frames 6 and tensioning nets 9 of various specifications and shapes.

[0054] In this embodiment, the middle position of the placement groove is recessed downwards so that the positioning mold is hollow. This arrangement can reduce the friction of the tensioning net from the chair frame and the positioning mold, so that the tensioning net can be tightened when installed on the chair frame.

[0055] In this embodiment, Figure 1 As shown, a first mounting plate 21 is fixedly mounted on the top of the first bracket 11, the first cylinder 2 is arranged vertically, the cylinder body of the first cylinder 2 is fixed to the first mounting plate 21, the telescopic rod of the first cylinder 2 is arranged downward, and the telescopic rod of the first cylinder 2 is inserted into and fixedly connected to the second bracket 22. To ensure the stability of the vertical movement between the second bracket 22, the second bracket 22 is connected to the first mounting plate 21 by multiple fourth guide posts 23, and the multiple fourth guide posts 23 are evenly mounted on the second bracket 22. This arrangement prevents rotation and shaking of the second bracket 22 during the lifting movement, improving the stability of the assembly.

[0056] like Figure 2-5As shown, the deformation device includes a positioning assembly and a deformation assembly, the positioning assembly is used to support the mesh chair frame 6, and the deformation assembly is used to drive the mesh chair frame 6 to deform. The positioning assembly includes a front positioning plate and a rear positioning plate, the front positioning plate includes a first front positioning plate 43, a second front positioning plate 44 and a rear positioning plate 45, the rear positioning plate 45 is fixedly mounted on the second bracket 22, the bottom of the rear positioning plate 45 protrudes backward with a rear positioning portion 451, the first front positioning plate 43 and the second front positioning plate 44 can both be slidably mounted on the second bracket 22, the first front positioning plate 43 and the second front positioning plate 44 are both located in front of the rear positioning plate 45, the first front positioning plate 43 and the second front positioning plate 44 are symmetrically arranged, the bottom of the first front positioning plate 43 protrudes forward with a first front positioning portion 431, and the bottom of the second front positioning plate 44 protrudes forward with a second front positioning portion 441. Such arrangement enables the first front positioning plate 43, the second front positioning plate 44 and the rear positioning plate 45 to form a stable triangular structure, so that the supported mesh chair frame 6 remains stable, and the slidable first front positioning plate 43 and the second front positioning plate 44 can match more specifications.

[0057] In order to facilitate the installation of the positioning component, in this embodiment, Figure 2-5 As shown, the device also includes a second mounting plate 3, which has two mounting portions 34 protruding thereon, and the tops of the two mounting portions 34 are fixedly connected to the ninth connecting plate 31; the top of the ninth connecting plate 31 is fixed to the bottom of the second bracket 22, and the ninth connecting plate 31 extends in the front and rear directions to facilitate the installation of the deformation device and the covering device, and the first front positioning plate 43, the second front positioning plate 44 and the rear positioning plate 45 are all installed below the second mounting plate 3.

[0058] In this embodiment, Figure 2-5As shown, the positioning assembly also includes a first fixing plate 432 and a second fixing plate 442, and the first fixing plate 432 and the second fixing plate 442 are both slidably mounted on the second mounting plate 3, the first fixing plate 432 is located on the rear side of the first front positioning plate 43, and the second fixing plate 442 is located on the rear side of the second front positioning plate 44, the first front positioning plate 43 and the first fixing plate 432 are slidably connected through a plurality of first guide columns 433, and the second front positioning plate 44 is slidably connected to the second fixing plate 442 through a plurality of second guide columns 443. Furthermore, there are two first guide posts 433, which are arranged up and down, and the front ends of the two first guide posts 433 are fixedly connected to the rear end of the first front positioning plate 43, and the first guide post 433 extends backward and passes through the first guide sleeve installed on the first fixing plate 432, and the first guide post 433 and the first guide sleeve slide together, so that the first front positioning plate 43 and the first fixing plate 432 are slidingly connected; there are two second guide posts 443, which are arranged up and down, and the front ends of the two second guide posts 443 are fixedly connected to the rear end of the second front positioning plate 44, and the second guide post 443 extends backward and passes through the second guide sleeve installed on the second fixing plate 442, and the second guide post 443 and the second guide sleeve slide together, so that the second front positioning plate 44 and the second fixing plate 442 are slidingly connected. Further preferably, the two first guide pillars 433 are each provided with a first return spring, the first return spring is located between the first front positioning plate 43 and the first fixed plate 432, and the front and rear ends of the first return spring are respectively against the first front positioning plate 43 and the first fixed plate 432; the two second guide pillars 443 are each provided with a second return spring, the second return spring is located between the second front positioning plate 44 and the second fixed plate 442, and the front and rear ends of the second return spring are respectively against the second front positioning plate 44 and the second fixed plate 442. In this way, after the net chair frame is installed on the first front positioning plate 43, the second front positioning plate 44 and the rear positioning plate 45, the first front positioning plate 43 and the second front positioning plate 44 can automatically reset, so that the net chair frame 6 can be hung on the positioning assembly, and because the first front positioning plate 43 and the second front positioning plate 44 are symmetrically arranged on both sides of the rear positioning plate 45, an isosceles triangle positioning path is formed between the first front positioning plate 43, the second front positioning plate 44 and the rear positioning plate 45, which can ensure that the posture of the same type of net chair frame 6 on the positioning assembly remains consistent, thereby maintaining product consistency and reducing the probability of failure in assembly of the net chair frame 6 and the stretch net 9.

[0059] In order to make the two front positioning plates move in unison, Figure 4 and Figure 5As shown, in this embodiment, the first front positioning plate 43 and the second front positioning plate 44 are fixedly connected by the first connecting plate 49. In this way, when the net chair frame 6 is installed on the positioning assembly, the first connecting plate 49 can be directly pushed to drive the first front positioning plate 43 and the second front positioning plate 44 to move backward, and the moving distance of the first front positioning plate 43 and the second front positioning is always consistent.

[0060] In order to facilitate the adjustment of the distance between the first front positioning plate 43 and the second front positioning plate 44, in this embodiment, as shown in FIG. Figure 4 As shown, the positioning assembly also includes a second connecting plate 40, the first fixing plate 432 and the second fixing plate 442 are fixedly connected through the second connecting plate 40, the second connecting plate 40 is on the second mounting plate 3 in a manner that can slide back and forth, and a plurality of first connecting holes are opened on the second connecting plate 40, and the first fixing plate 432 and the second fixing plate 442 can be connected to the first connecting holes located at different positions by fasteners such as bolts or positioning pins, so that the distance between the first front positioning plate 43 and the second front positioning plate 44 can be adjusted according to the size of the product.

[0061] In order to facilitate the adjustment of the height of the rear positioning plate 45, in this embodiment, Figure 3 、 Figure 4 and Figure 5 As shown, a third connecting plate 452 is installed under the second mounting plate 3, and a plurality of second connecting holes are provided on the third connecting plate 452, and the plurality of second connecting holes are divided into two columns set on the left and right. A plurality of third connecting holes are provided on the rear positioning plate 45, and the plurality of third connecting holes are divided into two columns set on the left and right. With such an arrangement, when installing the rear positioning plate 45, the third connecting holes on the rear fixing plate can be matched with the second connecting holes at different positions on the third connecting plate 452, and then fasteners such as bolts and positioning pins can be inserted into the second and third connecting holes to fix the rear positioning plate 45 on the third connecting plate 452.

[0062] In order to make the positioning assembly compatible with more specifications of the mesh chair frame 6, in this embodiment, Figure 5As shown, the second mounting plate 3 is provided with a first positioning hole 32 and a second positioning hole 33, and the first positioning hole 32 is located in front of the second positioning hole 33, and the first positioning hole 32 and the second positioning hole 33 are both waist-shaped holes extending forward and backward; when installing the second connecting plate 40 and the third connecting plate 452, bolts can be used to fix the second connecting plate 40 and the third connecting plate 452 on the second mounting plate 3, specifically, the threaded section of the bolt passes through the first positioning hole 32 and is threadedly connected to the second connecting plate 40, and the threaded section of the bolt passes through the second positioning hole 33 and is threadedly connected to the third connecting plate 452, and then, the spacing between the second connecting plate 40 and the third connecting plate 452 is adjusted. When the spacing between the second connecting plate 40 and the third connecting plate 452 is determined, the bolts are tightened to fix the second connecting plate 40 and the third connecting plate 452 on the second mounting plate 3.

[0063] In this embodiment, Figure 2-5 As shown, the deformation assembly includes a second cylinder 46, a first pressure block 41 and a second pressure block 42. The cylinder body of the second cylinder 46 is fixed to the bottom of the second mounting plate 3. The telescopic rod of the second cylinder 46 is set downward. The middle position of the fourth connecting plate 47 is fixedly connected to the bottom of the telescopic rod of the second cylinder 46. The first pressure block 41 and the second pressure block 42 are both slidably mounted on the fourth connecting plate 47. The first pressure block 41 and the second pressure block 42 are symmetrically arranged on the left and right. The telescopic second cylinder 46 can drive the fourth connecting plate 47 to move up and down and then simultaneously suppress the left and right ends of the net chair frame 6 through the first pressure block 41 and the second pressure block 42, so that the net chair frame 6 is deformed. Further preferably, as Figure 4 and Figure 5As shown, to further stabilize the movement of the fourth connecting plate 47, the deformation assembly further includes two first mounting blocks 462, two third guide posts 48, and two third guide sleeves. The two first mounting blocks 462 are disposed on the left and right sides and fixed to the second mounting plate 3. The two guide sleeves are respectively fixed to the two first mounting blocks 462. The two third guide posts 48 are disposed on the left and right sides. The second cylinder 46 is located between the two third guide posts 48. The bottom of the third guide post 48 is fixedly connected to the fourth connecting plate 47. The third guide post 48 extends vertically upward through the third guide sleeves and slides in engagement. This arrangement limits the movement of the fourth connecting plate 47 by the third guide posts 48 and the third guide sleeves, preventing the fourth connecting plate 47 from rotating. Furthermore, the bottom of the telescopic rod of the second cylinder 46 is fixed to the middle of the fourth connecting plate 47, and the two third guide posts 48 are disposed on either side of the second cylinder 46. This ensures stable lifting and lowering of the third connecting plate 452 and more uniform force exerted by the fourth connecting plate 47 on the chair frame. Further preferably, positioning blocks are fixedly installed on the top of the two third guide columns 48, and the positioning blocks are located above the first mounting seat 462. Such a setting can limit the lifting and lowering stroke of the fourth connecting plate 47, thereby preventing the fourth connecting plate 47 from being too low and affecting the strength of the mesh chair frame 6.

[0064] In this embodiment, the first pressing block 41 has a downwardly projecting first stopper 411 at its bottom, and the second pressing block 42 has a downwardly projecting second stopper 421 at its bottom. The distance between the first stopper 411 and the second stopper 421 is no less than the horizontal length of the net chair frame 6. This allows the left and right ends of the net chair frame 6 to be restrained between the first pressing block 41 and the second pressing block 42. Furthermore, the front and rear positioning plates 45 restrain the front and rear ends of the net chair frame 6, thus positioning the net chair frame 6 in all six directions: front, back, left, right, up, and down, ensuring a more stable installation of the net chair frame 6 on the equipment. In step 2), the second protrusion 66 on the second support portion 62 and the fourth support portion 64 is positioned between the first stopper of the first pressing block 41 and the second stopper of the second pressing block 42, thereby limiting the left and right movement of the chair frame 6.

[0065] More preferably, Figures 3 to 5As shown, the fourth connecting plate 47 is provided with a third positioning hole 471 and a fourth positioning hole 472. The seventh connecting plate 412 is fixedly mounted on the top of the first pressing block 41, and the eighth connecting plate 422 is fixedly mounted on the top of the second pressing block 42. The third positioning hole 471 is located above the seventh connecting plate 412, and the fourth positioning hole 472 is located above the eighth connecting plate 422. When installing the first pressing block 41, a bolt is passed through the third positioning hole 471 and then threadedly connected to the seventh connecting plate 412. A bolt is passed through the fourth positioning hole 472 and then threadedly connected to the eighth connecting plate 422. After adjusting the relative positions of the first pressing block 41 and the second pressing block 42, the bolts on the seventh connecting plate 412 and the bolts on the eighth connecting plate 422 are tightened. In this way, the relative positions of the first pressing block 41 and the second pressing block 42, as well as the positions of the first pressing block 41 and the second pressing block 42 on the fourth connecting plate 47, can be adjusted, allowing the device to better match a variety of mesh chair frames 6. More preferably, there are two third positioning holes 471 arranged in the front-to-back direction, two fourth positioning holes 472 arranged in the front-to-back direction, two seventh connecting plates 412 arranged in the front-to-back direction, and two eighth connecting plates 422 arranged in the front-to-back direction. This can limit the angle between the first pressing block 41 and the second pressing block 42, so that the first pressing block 41 and the second pressing block 42 are arranged facing each other.

[0066] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, the covering device includes a first guide wheel 56 and a second guide wheel 57, the first pulling cylinder 51 and the second pulling cylinder 53 are symmetrically arranged on the left and right and are installed on the second mounting plate 3, the first guide wheel 56 and the second guide wheel 57 are symmetrically arranged on the left and right and are both installed on the second mounting plate 3, the first guide wheel 56 and the second guide wheel 57 are located between the first pulling cylinder 51 and the second pulling cylinder 53, the first guide wheel 56 is close to the first pulling cylinder 51, and the second guide wheel 57 is close to the second pulling cylinder 53, the telescopic end of the first pulling cylinder 51 is provided with a first pulling hole 521 that matches the installation at one end of the steel wire rope 92, and the telescopic end of the second pulling cylinder 53 is provided with a second pulling hole 541 that matches the installation at the other end of the steel wire rope 92, the lowest point of the moving stroke of the first pulling cylinder 51 is higher than the lowest point of the first guide wheel 56, and the lowest point of the moving stroke of the second pulling cylinder 53 is higher than the lowest point of the second guide wheel 57. In step 4), the limit blocks 93 at both ends of the wire rope 92 are respectively installed on the extended telescopic ends of the first pulling cylinder 51 and the second pulling cylinder 53. When the telescopic ends retract into the cylinder bodies of the pulling cylinders, the wire rope 92 tightens the edge of the tension net 9 and wraps the edge of the chair frame 6.

[0067] More preferably, Figures 2 to 9 As shown, a fourth mounting seat 512 and a fifth mounting seat 532 are fixedly mounted on the second mounting plate 3. The fourth mounting seat 512 and the fifth mounting seat 532 are symmetrically arranged and fixed to the left and right ends of the second mounting plate 3, respectively. Both the fourth mounting seat 512 and the fifth mounting seat 532 are provided with inclined surfaces. The cylinder body of the first pulling cylinder 51 is fixed to the inclined surface of the fourth mounting seat 512, and the cylinder body of the second pulling cylinder 53 is fixed to the inclined surface of the fifth mounting seat 532. In this way, the first pulling cylinder 51 and the second pulling cylinder 53 are both inclined. The center position of the outer circumference of the first guide wheel 56 is concave inward, and the center position of the outer circumference of the second guide wheel 57 is concave inward. In this way, in step 4), the concave positions of the first guide wheel 56 and the second guide wheel 57 can limit the extension direction of the wire rope 92, thereby improving the stability of the pulling wire.

[0068] Further preferably, a slidable third mounting plate 59 is installed above the second mounting plate, and a fourth mounting plate and a fifth mounting plate are fixedly installed on the left and right ends of the third mounting plate 59, respectively. The fourth mounting plate is fixedly connected to the fourth mounting seat 512, and the fourth and fifth mounting plates are fixedly connected to the fifth mounting seat 532. Such an arrangement allows the first pulling cylinder and the second pulling cylinder to move back and forth synchronously, and adjust the positions of the first pulling cylinder and the second pulling cylinder on the second mounting plate. Specifically, a seventh positioning hole 591 is provided on the third mounting plate 59. The seventh positioning hole 591 is a waist-shaped hole extending in the front-to-back direction. When installing the third mounting plate, the thread of the bolt is continuously passed through the seventh positioning hole 591 and then threadedly connected to the top of the second mounting plate 3. When the position adjustment is completed, the bolt is tightened to fix the second mounting plate and the third mounting plate.

[0069] Further preferably, a second mounting seat and a third mounting seat 58 are fixedly mounted on the second mounting plate 3, the second mounting seat and the third mounting seat 58 are symmetrically arranged, and the second mounting seat and the third mounting seat 58 are located between the first pulling cylinder 51 and the second pulling cylinder 53. A fifth connecting plate that can be raised and lowered is mounted on the second mounting seat, and a sixth connecting plate 55 that can be raised and lowered is mounted on the third mounting seat 58. The fifth connecting plate and the sixth connecting plate 55 are both arranged vertically, and the first guide wheel 56 is rotatably mounted on the bottom of the fifth connecting plate, and the second guide wheel 57 is rotatably mounted on the bottom of the sixth connecting plate 55. With such an arrangement, the height of the first guide wheel 56 and the second guide wheel 57 can be adjusted, which not only allows the tensioning mesh 9 of different specifications to be matched, but also allows the tightness of the tensioning mesh 9 to be adjusted.

[0070] Further preferably, the second mounting seat is provided with a first vertically arranged sliding groove, the upper portion of the fifth connecting plate is located in the first sliding groove and is slidably connected thereto, the fifth connecting plate is provided with a fifth vertically extending positioning hole, and when the fifth connecting plate is installed, a bolt is passed through the fifth connecting hole and is threadedly connected to the second mounting seat; the third mounting seat 58 is provided with a second vertically arranged sliding groove, the upper portion of the sixth connecting plate 55 is located in the second sliding groove and is slidably connected thereto, the sixth connecting plate 55 is provided with a sixth vertically extending positioning hole, and when the sixth connecting plate 55 is installed, a bolt is passed through the sixth connecting hole and is threadedly connected to the third mounting seat 58. With this arrangement, the height of the first guide wheel 56 and the second guide wheel 57 can be adjusted simply by loosening or tightening the bolts on the second and third mounting seats 58.

[0071] Further preferably, the fifth connecting plate and the sixth connecting plate 55 are fixedly connected by a synchronization plate, so that the height of the first guide wheel 56 and the second guide wheel 57 can be kept consistent, maintaining the stability of the installation of the net chair frame 6 and the net 9.

[0072] In this embodiment, the end of the telescopic rod of the first pulling cylinder 51 is fixedly installed on the rear first pulling block 52, and the first pulling hole 521 is opened on the first pulling block 52; the end of the telescopic rod of the second pulling cylinder 53 is fixedly installed on the rear second pulling block 54, and the second pulling hole 541 is opened on the second pulling block 54; the first pulling hole 521 includes a first avoidance portion and a first driving portion, one end of the first avoidance portion is connected to the first driving portion, and the other end of the first avoidance portion extends and passes through the first pulling block 52; the second pulling hole 541 includes a second avoidance portion 5412 and a second driving portion 5411, one end of the second avoidance portion 5412 is connected to the second driving portion 5411, and the other end of the second avoidance portion 5412 extends and passes through the second pulling block 54.

[0073] More preferably, there are multiple first pull-out holes 521, and the driving parts of these multiple first pull-out holes 521 are of different heights. There are multiple second pull-out holes 541, and the second driving parts 5411 of these multiple second pull-out holes 541 are of different heights. This allows the device to be compatible with steel wire ropes 92 of different lengths, nets 9 of different specifications, and net chair frames 6 of different specifications, thereby improving the device's versatility.

[0074] In this embodiment, the placement device also includes a positioning box 69 for placing the positioning mold 7. The positioning box 69 is fixedly installed on the top of the workbench 1. The positioning box 69 is provided with a placement cavity with an opening facing upward. The outline of the positioning mold 7 is consistent with the outline of the placement cavity.

[0075] In this embodiment, Figure 1 As shown, an electric control cabinet 8 is fixedly installed on the workbench 1.

[0076] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A method for covering a chair frame with a stretching mesh, characterized in that: The chair frame comprises a first support portion (61), a second support portion (62), a third support portion (63) and a fourth support portion (64), wherein the first support portion (61), the second support portion (62), the third support portion (63) and the fourth support portion (64) are successively closed and downwardly enclosed to form a frame structure; the first support portion (61), the second support portion (62), the third support portion (63) and the fourth support portion (64) are all arc-shaped, wherein the first support portion (61) and the second support portion (62) are both downwardly convex, and the third support portion (63) and the fourth support portion (64) are upwardly convex; the side of the chair frame (6) covered with the stretched net (9) is the support surface (68), which is in contact with the support surface ( 68) The side opposite to the chair frame (68) is a mounting surface (67), a first protrusion (65) protrudes from the mounting surface (67), the first protrusion (65) is arranged around the inner hole of the chair frame (6), a second protrusion (66) protrudes from the first protrusion (65), the second protrusion (66) is arranged around the inner hole of the first protrusion (65), and a plurality of connecting seats arranged for the inner hole of the first protrusion (65) are protruded from the first protrusion (65); the stretching net (9) includes a stretching net body (91), and a steel wire rope (92) passing through the stretching net body (91), both ends of the steel wire rope (92) extend from the stretching net body (91), and both ends of the steel wire rope (92) are fixed with limit blocks; The specific steps of covering the chair frame with the stretch mesh (9) are as follows: Step 1) Lay the stretch mesh (9) flat under the chair frame (6); Step 2) limiting the chair frame (6) in six directions, including up, down, left, right, front and back, and squeezing the second protrusion (66) on the chair frame (6) to deform the chair frame (6); Step 3) Place the stretching net on the positioning mold so that the stretching net covers the placement slot on the top of the positioning mold. Press the deformed chair frame (6) onto the stretching net (9) so that the chair frame (6) and part of the stretching net (9) are pressed against the inner wall of the placement slot, and the edge of the stretching net is tilted upwards. Step 4) Cross the two ends of the steel wire rope (92), and then pull the steel wire rope (92) to reduce the length of the steel wire rope (92) on the tension net (9), so that the edge of the tension net (9) is tightened, and the tension net (9) wraps the edge of the deformed chair frame (6), so that the tension net (9) is tightened at one time; wherein the steel wire rope (92) is adjacent to the mounting surface (67) of the chair frame (6); Step 5) Use a nail gun to fix the two ends of the steel wire rope (92) at the intersection of the steel wire rope (92), and then release the chair frame (6). After the chair frame (6) returns to its original shape, the net (9) is tightened again; the outline enclosed by the steel wire rope (92) is smaller than the outline of the chair frame (6).

2. The method for covering a chair frame with a stretching net according to claim 1, wherein: The middle position of the placing groove is recessed downwards so that the positioning mold is hollow.

3. The method for covering a chair frame with a stretching net according to claim 1, wherein: In the step 2), the lower part of the vertically arranged front positioning plate and the lower part of the rear positioning plate (45) are both extended from the inner side of the chair frame (6), and the side walls of the front positioning plate and the side walls of the rear positioning plate (45) are both against the inner wall of the chair frame (6); the raised front positioning portion on the front positioning plate and the raised rear positioning portion on the rear positioning plate (45) are both against the support surface (68) of the chair frame (6), thereby supporting the first support portion (61) and the third support portion (63) of the chair frame (6) from bottom to top; the transversely arranged fourth connecting plate (47) presses the second support portion (62) on the chair frame (6) and the second raised portion (66) on the fourth support portion (64) from top to bottom, causing the chair frame (6) to deform.

4. The method for covering a chair frame with a stretching net according to claim 3, wherein: There are two front positioning plates, and the two front positioning plates are symmetrically arranged, and the rear positioning plate (45) is located at the rear side of the middle position of the two front positioning plates.

5. The method for covering a chair frame with a stretching net according to claim 3, wherein: Two left and right pressing blocks are fixedly mounted on the fourth connecting plate (47), and both pressing blocks have protruding limiting portions. In step 2), the second protruding portion (66) on the second supporting portion (62) and the fourth supporting portion (64) is located between the two limiting portions of the two pressing blocks, thereby limiting the left and right movement of the chair frame (6).

6. The method for covering a chair frame with a stretching net according to claim 1, wherein: In step 4), the limit blocks (93) at both ends of the steel wire rope (92) are respectively installed on the extended telescopic ends of the two pulling cylinders. When the telescopic ends retract into the cylinder bodies of the pulling cylinders, the steel wire rope (92) tightens the edge of the stretched net (9) and wraps the edge of the chair frame (6).

7. The method for covering a chair frame with a stretching net according to claim 6, wherein: In step 4), the two pulling cylinders are arranged at an angle and pull the two ends of the wire rope (92) upward.

8. The method for covering a chair frame with a stretching net according to claim 6, wherein: In step 4), the portions of the steel wire rope (92) extending from the mesh body (91) at both ends respectively abut against the outer circumferential surfaces of the two guide wheels, and the guide wheels are positioned below the lowest point of the telescopic end stroke of the pulling cylinder, so that the intersection of the two ends of the steel wire rope (92) is close to the mesh body (91).

9. The method for covering a chair frame with a stretching net according to claim 6, wherein: A pulling block is fixedly mounted on the telescopic end of the pulling cylinder, and a pulling hole matching the end portion of the steel wire rope (92) is opened on the pulling block; in the step 4), the limit block (93) on the steel wire rope (92) is mounted in the pulling hole.

10. The method for covering a chair frame with a stretching net according to claim 9, wherein: There are multiple pull-out holes.

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