Seat cover installation methods and equipment

Abstract

The present invention discloses a chair cover installation method and equipment, including a chair cover for covering a chair, wherein the chair includes a seat and a backrest, and the seat and the backrest are connected by two positioning components. The positioning components can fold the seat and the backrest into different angles, and the chair cover includes an upper covering portion, a lower covering portion and a connecting portion, and the upper covering portion and the lower covering portion are connected by the connecting portion. The connecting portion is ring-shaped, and avoidance holes matching the inner circle of the connecting portion are formed on the upper covering portion and the lower covering portion, and the avoidance holes are connected to the inner circle of the connecting portion; the chair cover can cover the seat and the backrest of the chair as a whole, and in the process of the chair cover covering the chair, the slider of the zipper used to close the chair cover never contacts the sponge covering the chair, and the sponge can be wrapped tightly.

Description

Technical Field

[0001] The present invention relates to the field of home furnishings, and in particular to a chair cover installation method and device. Background Art

[0002] The folding chair has two hinged parts. When the two parts are flattened, they are flat. The two parts can also be folded into any angle to facilitate users to sit and lean at any position at any time and anywhere.

[0003] There are two main methods for packaging folding chairs on the market. One is to cover the two parts of the folding chair with two independent chair covers respectively, and in order to wrap the folding chair tightly, the edges of the fabric used to cover the folding chair are often tightened by pressing; the other is to use a pocket-type chair cover, stuff the folding chair into the chair cover, and then seal the opening of the chair cover. However, in order to tightly wrap the chair cover and the folding chair, the chair cover and the various parts of the folding chair are usually fixed directly at multiple points. This not only reduces assembly efficiency, but also makes it difficult to remove the chair cover and makes it inconvenient to reinstall the removed chair cover.

[0004] In the prior art, a nursing chair disclosed in Publication No. CN212678739U includes a chair frame, which includes a seat frame, a back frame, and two armrests. The seat frame is circular, and the back frame is U-shaped. Two support rods are provided on either side of the seat frame, each of which is rotatably connected to the seat frame and fixedly connected to the back frame. The armrests are hinged to the two support rods. This allows the chair and back frame to be constrained at any angle.

[0005] The effect diagram of covering the chair cover on the chair frame body is as shown in the folding chair shown in the appearance patents with announcement numbers CN304891012S and CN3625100D.

[0006] In the prior art, after covering a folding chair, the cover is manually zipped up. During manual zipping, workers must pull the upper and lower parts of the cover together while holding the sponge on the chair frame to prevent it from interfering with the slider. This assembly method is time-consuming and labor-intensive, and mass production of folding chairs requires even more workers to complete the zippering process. Summary of the Invention

[0007] In order to solve the problem of low efficiency in installing a seat cover on a folding chair in the prior art, the present invention aims to provide a seat cover installation method and device, which can improve the assembly efficiency of the folding chair and the seat cover and improve the consistency of the product.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a method for installing a chair cover, wherein the chair cover covers the folding chair by means of a zipper; the folding chair comprises a seat and a backrest, one end of the seat is connected to one end of the backrest by two angle adjusters, and the angle adjusters can position the seat and the backrest at a variety of angles; the seat and the backrest are both covered with sponge; the zipper comprises an upper chain part, a lower chain part and a slider for driving the upper chain part and the lower chain part to be combined, a pull tab is mounted on the slider, and a pull hole is provided on the pull tab; the chair cover comprises an upper covering part and a lower covering part, both of which are provided with arc-shaped through holes, and the through holes on the upper covering part The edge of the zipper is sewn to the edge of the through hole on the lower covering part to connect the upper covering part and form an arc-shaped through hole on the seat cover; the upper chain part of the zipper is fixed to the outer edge of the upper covering part, and the lower chain part of the zipper is fixed to the outer edge of the lower covering part; an installation device is adopted, which includes a positioning plate, a second mounting seat, a roller and a hook, the positioning plate is fixed with a plurality of limit members, the roller is rotatably mounted on the second mounting seat, one end of the hook is a connecting end, the connecting end is fixedly connected to the second mounting seat, the other end of the hook is a hooking end, a positioning column is fixed on the hooking end, and the positioning column is located on the inner side of the hook; the steps of installing the seat cover are as follows:

[0009] Step 1) Pass the chair cover between the two angle adjusters of the folding chair so that the upper covering portion is located on the upper side of the folding chair and the lower covering portion is located on the lower side of the folding chair;

[0010] Step 2), placing the folding chair on the positioning plate, inserting the plurality of limiting members of the positioning plate into the through holes of the seat cover; wherein the plurality of limiting members are arranged along the through holes of the seat cover;

[0011] Step 3) Install the heads of the upper and lower chain sections onto the slider. Then, move the second mounting base toward the edge of the folding chair. The roller and the hook end of the pull hook push against a portion of the sponge, causing it to sink into the seat cover. Then, hang the zipper pull tab on the positioning post, with the slider located in the recessed area of ​​the sponge. The pull hook is inserted into the inner side of the seat cover.

[0012] Step 4), the positioning plate drives the folding chair to rotate, the pull hook passes through the positioning column to keep the zipper pull tab and slider immobile, and the folding chair drives the upper and lower chain parts of the zipper through the slider gradually, so that the zipper is gradually fastened from beginning to end;

[0013] Step 5) Move the second mounting base away from the folding chair and remove the covered folding chair from the positioning plate.

[0014] Preferably, the mounting device includes a first plate, a second plate and a third plate, the second plate is rotatably mounted on the first plate, the third plate is slidably mounted on the second plate, and the positioning plate is fixed on the third plate; the second mounting seat is slidably arranged above the first plate.

[0015] Preferably, the zipper is mounted on the chair cover in reverse, with the pull tab of the zipper located on the inner side of the chair cover.

[0016] Preferably, the length of the zipper is greater than the length of the edge of the chair cover. After the zipper is installed on the chair cover, the head of the upper chain part of the zipper is not connected to the upper covering part, and the head of the lower chain part is not connected to the lower covering part. In the above step 3), after the heads of the upper chain part and the lower chain part are installed on the slider, pull the slider toward the tail of the zipper, and then hang the pull tab on the positioning column of the hook.

[0017] Preferably, in the above step 4), when the zipper is fastened, the head of the zipper is located on the inner side of the chair cover.

[0018] Preferably, the middle portion of the roller is concave in an arc shape.

[0019] Preferably, in step 3), after the pull tab is hooked on the positioning post, the end of the pull head close to the positioning post is tilted toward the outside of the folding chair.

[0020] Preferably, the outline of the positioning plate matches the outline of the folding chair in the flattened state, and the outline of the positioning plate is smaller than the outline of the folding chair in the flattened state.

[0021] Preferably, a pin is fixed to the head of the upper chain part, and a block is fixed to the head of the lower chain part. Before the seat cover is installed, the slider is installed on the lower chain part.

[0022] A seat cover installation device applies the above-mentioned seat cover installation method.

[0023] The beneficial effects of the technical solution of the present invention are as follows: it can improve the efficiency of installing the chair cover on the folding chair, reduce the difficulty of installing the chair cover, adopt an integrated chair cover, and cover the seat and back of the folding chair separately at one time. Even if the folding chair is folded at various angles, the chair cover will not be affected by the angle and will always firmly cover the seat and back of the folding chair; and in the above-mentioned installation process, the roller and the pull hook always push the sponge to form a concave area on the sponge, and the slider is always located in the concave area during the movement, thereby avoiding the slider and the sponge from contacting each other, ensuring The zipper opens and closes smoothly, which improves the accuracy and safety of the installation process. The roller and the hook run around the folding chair to close the zipper, which greatly improves the installation efficiency of the chair cover. Since the height difference between the positioning plate and the hook is relatively fixed, the consistency of the chair cover installation position can be effectively guaranteed during mass production, avoiding wrinkles on the chair cover and improving the yield rate of folding chair production. In the process of the chair cover wrapping the folding chair, the sponge is squeezed and deformed when the chair cover is closed, so that the sponge recovers its shape after the chair cover is closed and the chair cover is tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the seat cover installation device in Example 1 is shown as follows: Figure 1 ;

[0025] Figure 2 Schematic diagram of the connection structure of the second plate, the third plate and the positioning plate;

[0026] Figure 3 Schematic diagram of the structure of the positioning plate;

[0027] Figure 4 Schematic diagram of the connection structure between the roller and the hook in Example 1;

[0028] Figure 5 This is a schematic structural diagram of the retractor in Example 1;

[0029] Figure 6 Schematic diagram of the connection structure between the roller and the hook in Example 2;

[0030] Figure 7 Schematic diagram of the zipper structure.

[0031] 1. Frame; 2. First plate; 3. Controller; 41. Second plate; 42. Third plate; 43. Positioning plate; 431. Limiting hole; 432. Connecting column; 44. Limiting member; 45. Slide rail; 46. First gear; 47. Second gear; 51. First mounting seat; 52. Roller; 521. Arc surface; 53. Hook; 531. Connecting end; 532. Hooking end; 533. Positioning column; 54. Positioning column II; 55. Second mounting seat; 6. Chair cover; 61. Through hole; 62. Upper covering portion; 63. Lower covering portion; 7. Zipper; 71. Lower chain portion; 72. Block; 73. Pull head; 74. Pull tab; 75. Lower chain tooth; 76. Lower stop; 77. Upper chain portion; 78. Pin; 79. Upper chain tooth. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] The orientations described in the following embodiments are Figure 1 The directions shown are subject to Figure 1 In the middle, the location of the controller 3 is on the left, the location of the first mounting base 51 is on the right, and the location of the rack is at the bottom. Example 1

[0038] A method for installing a chair cover, wherein the chair cover 6 is closed by a zipper 7 to cover a folding chair; the folding chair comprises a seat and a backrest, one end of the seat and one end of the backrest are connected by two angle adjusters, and the angle adjusters can position the seat and the backrest at various angles; the seat and the backrest are both covered with sponge; Figure 7 As shown, the zipper 7 includes an upper chain portion 77, a lower chain portion 71, and a pull head 73 for driving the upper chain portion 77 and the lower chain portion 71 to be combined. A pull tab 74 is installed on the pull head 73, and a pull hole is provided on the pull tab 74; Figure 7 As shown, the seat cover 6 includes an upper covering portion 62 and a lower covering portion 63, and an arc-shaped through hole is opened on the upper covering portion 62 and the lower covering portion 63. The edge of the through hole on the upper covering portion 62 and the edge of the through hole on the lower covering portion 63 are sewn together to connect the upper covering portion 62 and the lower covering portion 63, and an arc-shaped through hole is formed on the seat cover 6; the upper chain portion 77 of the zipper 7 is fixed to the outer edge of the upper covering portion 62, and the lower chain portion 71 of the zipper 7 is fixed to the outer edge of the lower covering portion 63; Figure 1-4 As shown, a mounting device is used, which includes a positioning plate 43, a second mounting seat 55, a roller 52 and a hook 53. A plurality of limit members 44 are fixed on the positioning plate 43. The roller 52 is rotatably mounted on the second mounting seat 55. One end of the hook 53 is a connecting end 531, which is fixedly connected to the second mounting seat 55. The other end of the hook 53 is a hooking end 532. A positioning column 533 is fixed on the hooking end 532. The positioning column 533 is located inside the hook 53. The steps for installing the seat cover are as follows:

[0039] Step 1) Pass the chair cover 6 between the two angle adjusters of the folding chair so that the upper covering portion 62 is located on the upper side of the folding chair and the lower covering portion 63 is located on the lower side of the folding chair;

[0040] Step 2) Place the folding chair on the positioning plate 43, and insert the plurality of limiting members 44 of the positioning plate 43 into the through holes 61 of the seat cover 6; wherein the plurality of limiting members 44 are arranged along the through holes 61 of the seat cover 6;

[0041] Step 3) Install the heads of the upper chain portion 77 and the lower chain portion 71 on the slider 73. Then, move the second mounting base 55 toward the edge of the folding chair. The roller 52 and the hook end 532 of the hook 53 push against part of the sponge, causing it to sink into the seat cover 6. Then, hook the pull tab 74 of the zipper 7 on the positioning post 533, with the slider 73 positioned in the sunken area of ​​the sponge. The hook 53 is inserted into the inner side of the seat cover 6.

[0042] Step 4), the positioning plate 43 drives the folding chair to rotate, and the hook 53 uses the positioning column 533 to keep the pull tab 74 and the slider 73 of the zipper 7 immobile. The folding chair drives the upper chain portion 77 and the lower chain portion 71 of the zipper 7 through the chair cover 6 to gradually pass through the slider 73, so that the zipper 7 is gradually fastened from the beginning to the end;

[0043] In step 5, the second mounting seat 55 is moved away from the folding chair, and the folding chair wrapped with the chair cover 6 is removed from the positioning plate 43.

[0044] With such an arrangement, an integrated chair cover 6 is used to cover the seat and backrest of the folding chair respectively at one time. Even if the folding chair is folded at various angles, the chair cover 6 will not be affected by the angle and will always firmly cover the seat and backrest of the folding chair. In the above-mentioned installation process, the roller 52 and the hook 53 always push the sponge to form a recessed area on the sponge, and the slider 73 is always located in the recessed area during the movement, thereby avoiding the slider 73 from abutting against the sponge, ensuring the smooth closing of the zipper 7, and improving the accuracy and safety of the installation process. The roller 52 and the hook 53 run around the folding chair to close the zipper 7, which greatly improves the installation efficiency of the chair cover 6. Moreover, since the height difference between the positioning plate 43 and the hook 53 is relatively fixed, the consistency of the installation position of the chair cover 6 can be effectively guaranteed during mass production, avoiding wrinkles on the chair cover 6 and improving the yield rate of folding chair production.

[0045] In this embodiment, the zipper 7 is mounted on the chair cover 6 in reverse, and the pull tab of the zipper is located on the inner side of the chair cover. In this way, the pull tab can be hidden inside the chair cover after the zipper is closed, making the folding chair more beautiful.

[0046] In this embodiment, the length of the upper chain portion 77 of the zipper 7 is greater than the length of the outer edge of the upper covering portion 62 of the seat cover 6, the length of the lower chain portion 71 of the zipper 7 is greater than the length of the outer edge of the lower covering portion 63 of the seat cover 6, the head of the upper chain portion 77 is not sewn to the upper covering portion 62, the tail of the upper chain portion 77 is sewn to the upper covering portion 62, the head of the lower chain portion 71 is not sewn to the lower covering portion 63, and the tail of the lower chain portion 71 is sewn to the lower covering portion 63; in this way, the length of the zipper 7 is greater than the length of the edge of the seat cover 6, and the head of the zipper 7 can protrude from the seat cover 6; in the above step 3), after the heads of the upper chain portion 77 and the lower chain portion 71 are installed on the slider 73, the slider 73 is manually pulled toward the tail of the zipper 7 to close the head of the zipper 7, and then the pull tab 74 is hung on the positioning column 533 of the hook. In the above step 4), after the zipper 7 is fastened, the head of the zipper 7 is inserted into the seat cover 6 so that the head of the zipper 7 does not protrude from the seat cover 6 .

[0047] In this embodiment, a latch 78 is fixed to the head of the upper chain portion 77, and a block 72 is fixed to the head of the lower chain portion 71. Before the chair cover 6 is installed, the slider 73 is installed on the lower chain portion 71. In step 3), before the pull tab 74 is hung on the positioning post 533, the latch 78 of the upper chain portion 77 is inserted into the slider 73 and the block 72, and then the slider 73 is pulled to close the head of the zipper 7. Furthermore, the tail ends of the upper chain portion 77 and the lower chain portion 71 are fixed to the bottom stop 76. In step 5), after the folding chair is removed from the positioning plate 43, the slider 73 is pulled again to move it to the bottom stop position of the zipper 7.

[0048] In this embodiment, the profile of the positioning plate 43 matches the profile of the folding chair in the flattened state, and the profile of the positioning plate 43 is smaller than the profile of the folding chair in the flattened state. In this way, interference between the roller 52 and the positioning plate 43 is avoided.

[0049] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the device also includes a rack 1, a first plate 2, a second plate 41 and a third plate 42 arranged in sequence from bottom to top, wherein the first plate 2 is fixed on the top of the rack 1, the second plate 41 is rotatably mounted on the first plate 2, the third plate 42 is slidably mounted on the second plate 41, the positioning plate 43 is fixed on the third plate 42, and the controller 3 is fixed on the first plate 2.

[0050] In this embodiment, Figure 3 As shown, there are multiple limiters 44, each with a limit portion protruding upward from the top. The positioning plate 43 has a limit hole 431 formed therein, the shape of which matches the shape of the through hole 61 in the seat cover 6. The positioning plate 43 is fixedly connected to the third plate 42 via multiple connecting posts 432, the height of which matches the height of the limiters 44. When installing the limiters 44, the limit portions of the multiple limiters 44 are positioned upward, and the limit portions are inserted from the bottom up through the limit holes 431. The third plate 42 and the positioning plate 43 are then fixed together using the connecting posts 432. The positioning plate 43 presses down on the top of the limiters 44 from the top down, thereby securing the limiters 44 to the positioning plate 43 and the third plate 42. This arrangement allows the device to accommodate a wider range of folding chairs by replacing limiters 44 of different specifications and structures and adjusting the gaps between the limiters 44.

[0051] Further preferably, the limiting member 44 includes a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate being spaced apart. A first limiting portion protrudes upward from the top of the first limiting plate, and a second limiting portion protrudes upward from the top of the second limiting plate. Both the first limiting portion and the second limiting portion extend through the limiting hole 431 of the positioning plate 43. In step 2), after the folding chair is mounted on the positioning plate 43, the first limiting portion and the second limiting portion respectively abut against two opposing side walls of the avoidance groove of the seat cover 6. In step 2), before the folding chair is mounted on the positioning plate 43, the gap between the first limiting portion and the second limiting portion is adjusted so that the portion of the limiting member 44 protruding from the positioning plate 43 more closely matches the avoidance groove of the seat cover 6. This arrangement allows the device to accommodate errors that may occur during the production of folding chairs, ensuring that the seat cover 6 neatly encases the folding chair.

[0052] In this embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the second plate 41 is fixedly mounted with a first gear 46, and the first gear 46 is rotatably mounted on the main shaft through a bearing. The main shaft is vertically arranged and rotatably mounted on the first plate 2. The first plate 2 is also mounted with a first motor, and a second gear 47 is fixedly mounted on the output end of the first motor. The first gear 46 and the first gear 46 are engaged for transmission.

[0053] Further preferably, the first gear 46 is a large gear and the second gear 47 is a small gear. With this arrangement, a first-stage reduction is formed by the meshing of the large gear and the small gear, thereby more accurately controlling the rotation angle of the positioning plate 43.

[0054] Further preferably, the first motor is mounted below the first plate 2, the first motor is located in the frame 1, and the second gear 47 has an axially extending journal, which is keyed to the output end of the first motor. This arrangement makes the structure of the device more reasonable.

[0055] In this embodiment, Figure 1 and Figure 2 As shown, two slide rails 45 are symmetrically fixed on the top of the first plate 2, and sliders are respectively installed on the two slide rails 45, and the two sliders are fixedly connected to the second plate 41; a screw rod is rotatably installed on the second plate, and a second motor is also installed on the second plate 41, and the second motor is transmission-connected to the screw rod, and a nut is threadedly connected to the screw rod, and the nut is fixedly connected to the third plate 42; the second motor can drive the screw rod to rotate, and the screw rod drives the nut to move along the extension direction of the slide rail 45, and the nut drives the third plate 42, the positioning plate 43 and multiple limit members 44 to move along the extension direction of the slide rail 45.

[0056] In this embodiment, Figure 1 and Figure 3 As shown, the first mounting seat 51 is fixed on the first plate 2, and the first mounting seat 51 is vertically arranged. A plurality of positioning holes are opened on the first mounting seat 51, and a plurality of positioning columns 54 are fixed on the second mounting seat 55. The plurality of positioning columns 54 are respectively inserted into the positioning holes at different positions. The positioning columns 54 can slide along the positioning holes to adjust the relative position of the folding chair and the second mounting seat 55.

[0057] Further preferably, in step 4), the first motor and the second motor drive the positioning plate 43 to move, so that the positioning plate 43 can move radially and axially along the first gear 46, and ensure that the side of the folding chair is always in contact with the roller 52 and the hook 53. In this way, the stability of the installation of the chair cover 6 is ensured. In this embodiment, Figure 4 As shown, the folding chair includes two arcuate sides and two straight sides, and the two arcuate sides are connected by two straight sides; in the above step 3), the head and tail of the zipper 7 are both arranged on the same straight side.

[0058] Preferably, a pneumatic cylinder is mounted on the first mounting seat 51, with its telescopic end connected to the second positioning post 54. This pneumatic cylinder controls the movement of the second mounting seat 55, ensuring more precise assembly of the seat cover 6. In this embodiment, in step 3), the pneumatic cylinder pushes the second mounting seat 55 toward the edge of the folding chair, causing the roller 52 and retractor 53 to push against a portion of the sponge, causing it to sink into the seat cover 6.

[0059] More preferably, Figure 4 As shown, the middle part of the roller 52 is recessed inward to form an arcuate surface 521, and the hook 53 is located in the middle of the roller 52. This arrangement allows the roller 52 to better match the edge of the folding chair, and also allows the zipper 7 to be installed in the middle of the folding chair. Figure 5As shown, one end of the hook 53 is a connecting end 531, and the other end of the hook 53 is a hooking end 532. The portion of the hook 53 between the connecting end 531 and the hooking end 532 is arc-shaped, and the hooking end 532 is linear. The connecting end 531 is fixed to the side of the second mounting seat 55, and the hooking end 532 extends into the roller 52. The horizontal length from the hooking end 532 to the positioning plate 43 does not exceed the horizontal length from the roller 52 to the positioning plate 43, thereby making the depth of the depression of the stroke of the roller 52 pushing the sponge less than The depth of the depression formed by the hook pushing the sponge; in the step 3), the hook end 532 of the pull hook 53 extends into the seat cover 6, the roller 52 is located outside the seat cover 6, and the part of the sponge located between the roller 52 and the pull hook 53 is inclined. After the pull tab 74 is hooked on the positioning column 533 of the pull hook 53, the pull head 73 is located between the roller 52 and the positioning column 533 of the pull hook 53, and the pull head 73 is not connected to the sponge. The side walls of the upper covering portion 62 of the pull tab 74 and the side edges of the lower covering portion 63 converge from the upper and lower sides of the pull hook 53 to the pull head 73.

[0060] Such arrangement, on the one hand, makes the end of the slider 73 near the hook 53 tilt toward the outside of the folding chair, thereby further avoiding interference between the sponge and the slider 73, ensuring the stability of the zipper 7 closing process; on the other hand, when the sponge is subjected to lateral pressure, the compressed part of the sponge will bulge upward and downward. Since the deformation degree of the part of the sponge abutted by the hook 53 is relatively small, the bulge degree of the sponge upward and downward is relatively low, thereby making it easier for the slider 73 to close the two upper chain parts 77 and the lower chain part 71 of the zipper 7. Example 2

[0061] Different from the above-mentioned embodiment 1, in this embodiment, Figure 4 The middle position of the roller 52 is located inside the draw hook 53, and the hook end 532 of the draw hook 53 passes through the recessed portion at the middle position of the roller 52;

[0062] In step 3), the cylinder drives the second mounting base 55 toward the folding chair, which in turn drives the hook 53 and roller 52 to move, causing a portion of the roller 52 to be located within the seat cover 6 and the hook end 532 of the hook 53 to extend into the seat cover 6. The hook 53 and roller 52 both directly contact the sponge, and the pull tab 74 of the zipper 7 is hooked on the positioning post 533 of the hook 53; the hook end 532 of the hook 53 is located between the slider 73 and the sponge, and the positioning post 533 of the hook 53 is located between the slider 73 and the roller 52. In step 4), during the movement of the positioning plate 43, the upper chain portion 77 and lower chain portion 71 of the zipper 7 move from the upper and lower sides of the roller 52, respectively, toward the slider 73.

[0063] This arrangement allows the pull tab 74 of the zipper 7 to be connected to the connected hook 53 more easily.

[0064] The other parts of this embodiment are the same as those of embodiment 1.

[0065] 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.

[0066] 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 seat cover installation method, characterized in that: The chair cover (6) is enclosed by a zipper (7) to cover the folding chair; the folding chair comprises a seat and a backrest, one end of the seat is connected to one end of the backrest by two angle adjusters, and the angle adjusters can position the seat and the backrest at various angles; the seat and the backrest are both covered with sponge; the zipper (7) comprises an upper chain portion (77), a lower chain portion (71), and a slider (73) for driving the upper chain portion (77) and the lower chain portion (71) to be coupled, a pull tab (74) being mounted on the pull tab (73), and a pull hole being provided on the pull tab (74); The chair cover (6) includes an upper covering portion (62) and a lower covering portion (63), wherein both the upper covering portion (62) and the lower covering portion (63) are provided with an arc-shaped through hole, and the edge of the through hole on the upper covering portion (62) and the edge of the through hole on the lower covering portion (63) are sewn together to connect the upper covering portion (62) and the lower covering portion (63), and an arc-shaped through hole is formed on the chair cover (6); the upper chain portion (77) of the zipper (7) is fixed to the outer edge of the upper covering portion (62), and the lower chain portion (71) of the zipper (7) is fixed to the outer edge of the lower covering portion (63); A mounting device is used, which includes a positioning plate (43), a second mounting seat (55), a roller (52) and a hook (53), wherein a plurality of limit members (44) are fixed on the positioning plate (43), the roller (52) is rotatably mounted on the second mounting seat (55), one end of the hook (53) is a connecting end (531), and the connecting end (531) is fixedly connected to the second mounting seat (55), and the other end of the hook (53) is a hook end (532), and a positioning column (533) is fixed on the hook end (532), and the positioning column (533) is located inside the hook (53); the steps of installing the seat cover are as follows: Step 1), passing the chair cover (6) between the two angle adjusters of the folding chair so that the upper covering portion (62) is located on the upper side of the folding chair and the lower covering portion (63) is located on the lower side of the folding chair; Step 2), placing the folding chair on the positioning plate (43), inserting the plurality of limiting members (44) of the positioning plate (43) into the through holes (61) of the chair cover (6); wherein the plurality of limiting members (44) are arranged along the through holes (61) of the chair cover (6); Step 3), the head of the upper chain part (77) and the head of the lower chain part (71) are both mounted on the slider (73); then the second mounting seat (55) is moved toward the edge of the folding chair, and the roller (52) and the hook end (532) of the pull hook (53) push a portion of the sponge, causing the portion of the sponge to be recessed into the chair cover (6); then the pull tab (74) of the zipper (7) is hung on the positioning column (533), and the slider (73) is located in the recessed area of ​​the sponge; wherein, the pull hook (53) is inserted into the inner side of the chair cover (6); Step 4), the positioning plate (43) drives the folding chair to rotate, the hook (53) makes the pull tab (74) and the slider (73) of the zipper (7) immobile through the positioning column (533), and the folding chair drives the upper chain portion (77) and the lower chain portion (71) of the zipper (7) through the chair cover (6) to gradually pass through the slider (73), so that the zipper (7) is gradually fastened from beginning to end; Step 5), the second mounting seat (55) is away from the folding chair, and the folding chair wrapped with the chair cover (6) is removed from the positioning plate (43).

2. A seat cover installation method according to claim 1, characterized in that: The mounting device comprises a first plate (2), a second plate (41) and a third plate (42), wherein the second plate (41) is rotatably mounted on the first plate (2), the third plate (42) is slidably mounted on the second plate (41), and the positioning plate (43) is fixed on the third plate (42); and the second mounting seat (55) is slidably arranged above the first plate (2).

3. The seat cover installation method according to claim 1, characterized in that: The zipper (7) is mounted on the chair cover (6) in reverse, and the pull tab (74) of the zipper (7) is located on the inner side of the chair cover (6).

4. The seat cover installation method according to claim 1, characterized in that: The length of the zipper (7) is greater than the length of the edge of the chair cover (6). After the zipper (7) is installed on the chair cover (6), the head of the upper chain portion (77) of the zipper (7) is not connected to the upper covering portion (62), and the head of the lower chain portion (71) is not connected to the lower covering portion (63); in the above step 3), after the heads of the upper chain portion (77) and the lower chain portion (71) are installed on the slider (73), the slider (73) is pulled to move toward the tail of the zipper (7), and then the pull tab is hung on the positioning column (533) of the hook.

5. The seat cover installation method according to claim 1, characterized in that: In the above step 4), when the zipper (7) is fastened, the head of the zipper (7) is located inside the chair cover (6).

6. The seat cover installation method according to claim 1, characterized in that: The middle portion of the roller (52) is concave and arc-shaped.

7. The seat cover installation method according to claim 1, characterized in that: In the step 3), after the pull tab (74) is hooked onto the positioning post (533), the end of the pull head (73) close to the positioning post (533) is tilted toward the outside of the folding chair.

8. The seat cover installation method according to claim 1, characterized in that: The outline of the positioning plate (43) matches the outline of the folding chair in the flattened state, and the outline of the positioning plate (43) is smaller than the outline of the folding chair in the flattened state.

9. The seat cover installation method according to claim 1, characterized in that: A latch (78) is fixed to the head of the upper chain portion (77), and a block (73) is fixed to the head of the lower chain portion (71). Before the chair cover (6) is installed, the pull head (73) is installed on the lower chain portion (71).

10. A device for installing a seat cover, characterized in that: A chair cover installation method according to any one of claims 1 to 9 is used.

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