Eyelet, sheet including eyelet, and method for manufacturing the same

Abstract

To provide an eyelet which can be properly crimped to a sheet and can be easily disassembled and replaced.SOLUTION: The present invention for solving the problem is an eyelet X attachable to a through hole H provided in a sheet Y, the eyelet X including an annular first body portion 1 and an annular second body portion 2 each having an outer peripheral edge and an inner peripheral edge, the first body portion 1 and the second body portion 2 each further having a plurality of protrusions arranged in two or more concentric circles on one plane, the first body portion 1 and the second body portion 2 are provided so as to be connectable to each other in a state of facing each other on the one plane, and an inner peripheral side interval which is an interval between the adjacent projections on a circle close to the inner peripheral edge is wider than an outer peripheral side interval which is an interval between the adjacent projections on a circle close to the outer peripheral edge.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to grommets attached along the edges of sheet material and to a method for manufacturing sheeting including grommets. [Background technology]

[0002] Grommets attached along the edges of the sheeting are required to be strong and durable in order to allow ropes and hooks to pass through. Furthermore, they must be waterproof and UV resistant, as they are intended for outdoor use. For these reasons, grommets were generally made from metal, but when disposing of the sheeting, the grommets had to be removed and separated. To address this issue, resin grommets, which offer strength and weather resistance, have been developed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4716849 Summary of the Invention [Problem to be solved by the invention]

[0004] The grommet described in Patent Document 1 is made of resin and has many protrusions on the inner surface that clamps the sheet from the front and back, making it possible to attach the sheet by pressing the entire grommet. However, if the protrusions are arranged densely near the center hole of the grommet, the protrusions are likely to interfere with each other when the upper and lower parts are mated, and there is a high possibility that the flat plate of the grommet will lift up around the hole. In addition, it is preferable that the grommet is configured so that it can be easily removed with a tool when removing it from the sheet and replacing it.

[0005] In view of the above problems, the present invention aims to provide an eyelet that can be appropriately pressed onto a sheet and can be easily disassembled and replaced. [Means for solving the problem]

[0006] The present invention, which solves the above-mentioned problem, is a grommet that can be attached to a through hole provided in a sheet, and comprises annular first and second main body portions having outer and inner peripheral edges, the first and second main body portions each further having a plurality of protrusions arranged in two or more concentric circles on a single plane, the first and second main body portions being arranged so as to be connectable to each other while facing each other on the single plane, and the inner peripheral side spacing, which is the spacing between adjacent protrusions on a circle close to the inner peripheral edge, is wider than the outer peripheral side spacing, which is the spacing between adjacent protrusions on a circle close to the outer peripheral edge. With this configuration, the eyelets can be properly pressed onto the sheet and can be easily disassembled to form replaceable eyelets.

[0007] In a preferred embodiment of the present invention, the difference in the angular deviation about the center point between the projections on the concentric circles is such that the inner circumferential spacing is an integer multiple of the outer circumferential spacing. This configuration makes it possible to easily align the protrusions of the first body portion and the protrusions of the second body portion.

[0008] In a preferred embodiment of the present invention, the first main body portion further has a raised portion that rises along the inner peripheral edge, the raised portion being capable of penetrating inside the inner peripheral edge of the second main body portion, and further having a locking portion that locks onto the peripheral portion of the inner peripheral edge. With this configuration, the edges of the through holes in the sheet can be protected more reliably.

[0009] In a preferred embodiment of the present invention, the first body portion further has a positioning portion that protrudes from the outer periphery from which the raised portion rises, and the second body portion further has a notch that can be fitted with the positioning portion. With this configuration, the components can be easily positioned relative to each other when assembling the eyelet.

[0010] In a preferred embodiment of the present invention, the first body portion and the second body portion have protruding portions that protrude further outward from the outer peripheral edges, and the thickness of the protruding portions is thinner than the thickness of the first body portion and the second body portion. This configuration makes it easy to create a gap for tools to fit in, and makes it easy to disassemble the eyelet.

[0011] A preferred embodiment of the present invention is a sheet including the eyelets. With this configuration, the through holes are appropriately reinforced and the sheet can be easily fitted with replacement eyelets.

[0012] The present invention, which solves the above-mentioned problems, is a method for manufacturing a sheet having grommets attached, and includes a folding step of folding back the peripheral portion of the sheet, a perforating step of drilling through holes along the edge portion of the folded back sheet, a clamping step of clamping the edge of the through hole between a first body portion and a second body portion that constitute the grommets and crimping the sheet with multiple protrusions on the first body portion and the second body portion, and a welding step of welding and connecting the first body portion and the second body portion along the edge of the through hole. By using such a manufacturing method, the eyelets can be properly pressed onto the sheet and can be attached in a state that allows them to be easily disassembled and replaced. [Effects of the Invention]

[0013] The present invention, which solves the above-mentioned problems, provides a grommet that can be appropriately pressed onto a sheet and can be easily disassembled and replaced. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an explanatory diagram showing a state in which a grommet is attached to a sheet according to an embodiment of the present invention. FIG. [Figure 2] 1 is an explanatory diagram showing a configuration for assembling a grommet according to an embodiment of the present invention. FIG. [Figure 3] 3A to 3C are explanatory diagrams showing the configuration of each component included in the eyelet according to the embodiment of the present invention. [Figure 4] 1A to 1C are a plan view, a front view, and a cross-sectional view showing the configuration of a first main body portion included in a grommet according to an embodiment of the present invention. [Figure 5] 1A to 1C are a plan view, a front view, and a cross-sectional view showing the configuration of a second main body portion included in a grommet according to an embodiment of the present invention. [Figure 6] 1 is a cross-sectional view showing a configuration when attaching an eyelet to a sheet according to an embodiment of the present invention. FIG. [Figure 7] 10A to 10C are explanatory diagrams showing modified examples of the configuration of the eyelets according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, the grommet X and the sheet Y according to the embodiment of the present invention will be described with reference to the drawings. The description will be made in detail in the order of the configuration of the embodiment, the method of implementation, and other examples. The following embodiment is an example of the present invention, and the present invention is not limited to the following embodiment.

[0016] <Embodiment> As shown in Fig. 1, the eyelet X according to this embodiment can be attached to a through hole H provided in a sheet Y, and covers and protects the edge of the through hole H. The eyelet X also includes a first body portion 1 and a second body portion 2, which sandwich the edge of the through hole H from both sides. In the following description, the direction of the central axis A shown in Figs. 3, 4, 5, and 6 will be referred to as the "axial direction," and this will also be used in descriptions using other figures.

[0017] Sheet Y is a typical flexible sheet having through holes H through which ropes or the like are expected to be inserted, and includes tarpaulin and polyvinyl chloride sheets. In this embodiment, the peripheral portion of sheet Y is preferably folded once or twice to have edge portions E as shown in FIG. 1. This configuration can reinforce sheet Y so that it does not easily break.

[0018] As shown in Fig. 1, the through holes H are holes provided along the edge E of the sheet Y (along the edge), and allow wire or rod material to be inserted therethrough. A plurality of through holes H are provided at approximately equal intervals along each direction of the edge E, and grommets X are attached to all of the through holes H.

[0019] 2 shows the configuration of the first body portion 1 and the second body portion 2 that make up the eyelet X. The first body portion 1 and the second body portion 2 are each annular with an outer peripheral edge and an inner peripheral edge, and are flat plate-like members that have opposing flat surfaces that face each other and outward flat surfaces that face each other when combined to form the eyelet X, and sandwich the sheet Y by having one flat surface of each of the first body portion 1 and the second body portion 2 face each other and overlap in the axial direction. In the following description, the outer peripheral edge, inner peripheral edge, opposing flat surface, and outward flat surface that the first body portion 1 and the second body portion 2 share in common will be distinguished by adding "first" and "second" to them, and will be assigned different reference numerals.

[0020] As shown in Figures 3(a), 4(a), 4(b), and 4(c), the first main body portion 1 is an annular, flat member having a first outer peripheral edge 11, a first inner peripheral edge 12, a first opposing flat surface 13, and a first outward flat surface 14, and further has a raised portion 15 that rises in the axial direction along the first inner peripheral edge 12.

[0021] The first outer peripheral edge 11 and the first inner peripheral edge 12 are peripheral edges that determine the overall size of the first main body portion 1 (grommet X), and the first inner peripheral edge 12 has a smaller diameter than the through hole H of the sheet Y. As a result, the first main body portion 1 covers the edge of the through hole H from one side.

[0022] The first opposing flat surface 13 is a portion that forms an annular plane between the first outer peripheral edge 11 and the first inner peripheral edge 12, and faces the second main body portion 2 when assembling the eyelet X. In addition, the first opposing flat surface 13 has a plurality of first side protrusions 131 provided on its surface.

[0023] The first side protrusions 131 are columnar, hemispherical (semi-elliptical), or conical members that protrude from the surface of the first opposing flat surface 13, and are pressed against the sheet Y by coming into contact with or close to the second main body portion 2. Furthermore, a plurality of first side protrusions 131 are provided on the first opposing flat surface 13 in a predetermined arrangement when viewed from the axial direction, and it is particularly preferable that they are arranged in a circle, or even concentric circles, based on the arrangement circle C.

[0024] As shown in FIG. 4(a), the first side projections 131 are arranged in two or more concentric circles centered on the central axis A. The arrangement circle C, which determines the arrangement of the first side projections 131, includes one or more, preferably two or more, inner side arrangement circles C1 close to the first inner circumferential edge 12 and one or more outer side arrangement circles C2 close to the first outer circumferential edge 11. The distance between adjacent first side projections 131 on the inner side arrangement circle C1 (inner side distance) is wider than the distance between adjacent first side projections 131 on the outer side arrangement circle C2 (outer side distance). This configuration prevents the first side projections 131 on the inner side arrangement circle C1, which has a short circumference, from being densely packed more than necessary, allowing the sheet Y to be appropriately pressure-bonded using a small amount of material. In addition, a first side protrusion 131 is provided over almost the entire first opposing surface 13, which presses the area around the through hole H over a wide area when attached to the sheet Y, thereby preventing the sheet Y from breaking at the through hole H or the through hole H from widening due to the sheet Y being pulled.

[0025] In the arrangement of the first side projections 131, the inner circumference side spacing and the outer circumference side spacing may be the length of an arc on the circumference of the inner circumference side arrangement circle C1 and the outer circumference side arrangement circle C2, respectively, or may be a linear distance (chord length), or may be defined by a deflection angle based on the center point of each arrangement circle C and one direction of a radius. In particular, when a deflection angle is used, the deflection angle difference R is the angle between the deflection angles of adjacent first side projections 131 on the same arrangement circle C, and when considering the inner circumference side deflection angle difference R1 and the outer circumference side deflection angle difference R2 as in the arrangement circle C, the inner circumference side deflection angle difference R1 is larger than the outer circumference side deflection angle difference R2. In this case, it is further preferable that the inner circumference side deflection angle difference R1 be at least twice or an integer multiple of the outer circumference side deflection angle difference R2.

[0026] 4(a), the size of the first side protrusions 131 is determined by the size of the first side protrusions 131 themselves in a plan view and the distance between adjacent first side protrusions 131 on each arrangement circle C. Here, the diameter of the first side protrusions 131 in a plan view is shorter than the distance between adjacent first side protrusions 131 on each arrangement circle C. With this configuration, the number of protrusions can be limited to a certain extent, making it possible to manufacture the first main body portion 1 using less material and also suppressing individual differences during molding due to interference between the first side protrusions 131.

[0027] The first outward flat surface 14 is a flat surface opposite to the first opposing flat surface 13, and faces outward when the eyelet X is assembled. The first outward flat surface 14 is preferably as smooth as possible, and such a configuration prevents unintended snagging during use and enables the eyelet to be stably attached to the sheet Y.

[0028] The rising portion 15 is a cylindrical member that rises from the first inner peripheral edge 12 toward the first opposing flat surface 13 along the axial direction, with its inner peripheral surface being flush with the first inner peripheral edge 12 and its outer peripheral surface corresponding to the through hole H. This allows the rising portion 15 to pass through the through hole H and the annular portion of the second main body portion 2. As shown in FIGS. 4(b) and 4(c), it is preferable that the corner on the outer peripheral surface of the tip of the rising portion 15 be chamfered or filleted. This configuration makes it easier to pass the rising portion 15 through the second main body portion 2 and the through hole H.

[0029] As shown in Figures 3(b), 5(a), 5(b), and 5(c), the second main body portion 2, like the first main body portion 1, is an annular, flat member having a second outer peripheral edge 21, a second inner peripheral edge 22, a second opposing plane 23, and a second outward plane 24, and the second opposing plane 23 is provided with a second side protrusion 231, like the first side protrusion 131.

[0030] The second outer peripheral edge 21 and the second inner peripheral edge 22 are peripheral edges that determine the overall size of the second main body portion 2 (grommet X), and the diameter that determines the size of the second inner peripheral edge 22 is approximately equal to or slightly larger than the outer diameter of the rising portion 15 of the first main body portion 1. This allows the rising portion 15 of the first main body portion 1 to penetrate, and the second main body portion 2 not only makes it easy to assemble the grommet X, but also covers the edge of the through hole H from one side.

[0031] The second opposing flat surface 23 is a portion that forms an annular plane between the second outer peripheral edge 21 and the second inner peripheral edge 22, and faces the first main body portion 1 when assembling the eyelet X. In addition, the second opposing flat surface 23 has a plurality of second side protrusions 231 provided on its surface.

[0032] The second side protrusions 231 are columnar, hemispherical (semi-elliptical), or conical members that protrude from the surface of the second opposing plane 23, and are pressed against the sheet Y by coming into contact with or close to the first main body portion 1. Furthermore, a plurality of second side protrusions 231 are provided on the second opposing plane 23 in a predetermined arrangement when viewed from the axial direction, and it is particularly preferable that they are arranged in a circle, or even in a concentric circle, based on the arrangement circle C.

[0033] As shown in FIG. 5(a), the second side projections 231 are arranged in two or more concentric circles centered on the central axis A. The arrangement circle C, which determines the arrangement of the second side projections 231, includes one or more, preferably two or more, inner side arrangement circles C1 close to the second inner circumferential edge 22 and one or more outer side arrangement circles C2 close to the second outer circumferential edge 21. The distance between adjacent second side projections 231 on the inner side arrangement circle C1 (inner side distance) is wider than the distance between adjacent second side projections 231 on the outer side arrangement circle C2 (outer side distance). This configuration prevents the second side projections 231 on the inner side arrangement circle C1, which has a short circumference, from being densely packed more than necessary, allowing the sheet Y to be appropriately pressure-bonded using a small amount of material. In addition, a second side protrusion 231 is provided over almost the entire second opposing surface 23, which presses the area around the through hole H over a wide area when attached to the sheet Y, thereby preventing the sheet Y from breaking at the through hole H or the through hole H from widening due to the sheet Y being pulled.

[0034] In the arrangement of the second-side projections 231, the inner circumference side spacing and the outer circumference side spacing may be the length of an arc on the circumference of the inner circumference side arrangement circle C1 and the outer circumference side arrangement circle C2, respectively, or may be a linear distance (chord length). Alternatively, they may be defined by a deflection angle based on the center point of each arrangement circle C and a direction with a radius. In particular, when a deflection angle is used, the deflection angle difference R is the angle between the deflection angles of adjacent second-side projections 231 on the same arrangement circle C. Considering the inner circumference side deflection angle difference R1 and the outer circumference side deflection angle difference R2, as with the arrangement circle C, the inner circumference side deflection angle difference R1 is greater than the outer circumference side deflection angle difference R2. In this case, it is preferable that the inner circumference side deflection angle difference R1 be at least twice as large as the outer circumference side deflection angle difference R2, or an integer multiple thereof. With this configuration, when the first side protrusion 131 and the second side protrusion 231 abut against each other, by shifting the positions of the first side protrusion 131 and the second side protrusion 231 on the outer circumferential arrangement circle C2, the positions of the first side protrusion 131 and the second side protrusion 231 on the inner circumferential arrangement circle C1 can also be easily shifted, and the sheet Y can be clamped so that it is caught between each protrusion and the opposing plane.

[0035] As shown in FIG. 5( a), the size of the second lateral protrusions 231 is determined by the size of the second lateral protrusions 231 themselves in a planar view and the distance between adjacent second lateral protrusions 231 on each arrangement circle C. Here, the diameter of the second lateral protrusions 231 in a planar view is shorter than the distance between adjacent second lateral protrusions 231 on each arrangement circle C. This configuration limits the number of protrusions to a certain extent, enabling the second main body portion 2 to be manufactured using less material and suppressing individual differences during molding due to interference between the second lateral protrusions 231. Furthermore, when the first main body portion 1 and the second main body portion 2 are combined, the second lateral protrusions 231 fit into the gaps between the first lateral protrusions 131, i.e., the first lateral protrusions 131 and the second lateral protrusions 231 are alternately pressed against the sheet Y, thereby more stably and evenly reinforcing the edge of the through hole H.

[0036] The second outwardly facing surface 24 is a surface opposite to the second opposing surface 23, and faces outward when the eyelet X is assembled. The second outwardly facing surface 24 is preferably as smooth as possible, and such a configuration prevents unintended snagging during use and enables the eyelet to be stably attached to the sheet Y.

[0037] When the first body portion 1 and the second body portion 2 configured as described above are assembled to sandwich the sheet Y as shown in FIGS. 6( a), 6(b), and 6(c), the rising portion 15 forms a locking portion 151. As shown in FIG. 6(c), the locking portion 151 is formed by melting the tip portion of the rising portion 15 that penetrates the second inner circumferential edge 22 and wrapping it around the second outward flat surface 24 to be fixed, thereby fixing the first body portion 1 and the second body portion 2 together. Furthermore, with this configuration, the vicinity of the inner circumferential edge of the eyelet X is stably fixed, so that even if the number of first side protrusions 131 and second side protrusions 231 provided along the inner circumferential arrangement circle C1 is smaller than the number of first side protrusions 131 and second side protrusions 231 on the outer circumferential arrangement circle C2, the sheet Y can be kept in a sufficiently stable crimped state.

[0038] The material of the eyelets X (first body portion 1 and second body portion 2) is preferably made of resin, and particularly preferably contains polyethylene or polycarbonate. This configuration achieves both durability against load and flexibility that allows for appropriate bending due to localized load, and also makes it easy to remove the eyelets X from the sheet Y and to attach replacements.

[0039] The present invention may have the following configurations. However, the following configurations are merely examples, and the presence or absence of the configurations can be determined arbitrarily unless otherwise specified.

[0040] <Example of change> The second outward flat surface 24 may have a chamfered or stepped notch around the corner where it meets the second inner circumferential edge 22. With this configuration, as shown in Fig. 6(c), when the locking portion 151 is formed by welding, the area in which the locking portion 151 is formed is enlarged, and the contact area between the locking portion 151 and the second main body portion 2 is increased during welding, making the fixation stronger. Furthermore, because a portion of the locking portion 151 is configured to be embedded inward from the second outward flat surface 24, the volume of the locking portion 151 that protrudes outward from the second outward flat surface 24 is reduced, allowing the shape of the eyelet X to be closer to a smoother shape.

[0041] The first body portion 1 and the second body portion 2 each have a first protruding portion 16 and a second protruding portion 25 that protrude further outward from the first outer peripheral edge 11 and the second outer peripheral edge 21, respectively, in other words, in a direction away from the central axis A. The first protruding portion 16 is a member that protrudes from the first outer peripheral edge 11 and expands the flat portion of the first body portion 1, and its axial thickness is thinner than the thickness of the flat portion (in other words, shorter than the linear distance from the first opposing flat surface 13 to the first outward flat surface 14). The same is true for the second protruding portion 25. This configuration forms an easily deformable region on the outer edges of the first body portion 1 and the second body portion 2, improving the followability of the eyelet X when the sheet Y is bent and making it less likely to come off. Furthermore, when removing the eyelet X from the sheet Y for replacement, it is easy to insert a tool or the like to peel the first body portion 1 and the second body portion 2 apart.

[0042] 7, the first body portion 1 is preferably configured to have a positioning portion 17 that protrudes toward the first outer peripheral edge 11 on the outer periphery from which the rising portion 15 rises. In addition, the second body portion 2 is preferably configured to have a notch 26 at the second inner peripheral edge 22 that can fit into the positioning portion 17. With this configuration, when the rising portion 15 is inserted into the inside of the second inner peripheral edge 22, the positioning portion 17 fits into the notch 26, preventing the first body portion 1 and the second body portion 2 from rotating and moving out of alignment with each other.

[0043] Example In the example shown in Figures 4(a) and 5(a), in the first main body portion 1 and the second main body portion 2, the inner circumference side arrangement circle C1 and the outer circumference side arrangement circle C2 are each arranged in two rows, the inner circumference side deflection angle difference R1 is 18 degrees, and the outer circumference side deflection angle difference R2 is 9 degrees, and the first side protrusions 131 and the second side protrusions 231 are arranged according to each condition.

[0044] Hereinafter, a method for carrying out the present invention will be described in detail with reference to the drawings. The ...

[0045] <<Implementation Method>> The user first folds back each peripheral portion of the sheet Y to form an edge portion E (folding process), and then opens through holes H along the edge portion E (perforation process). At this time, a plurality of through holes H are perforated on the edge portion E at approximately equal intervals in the length direction thereof.

[0046] Next, as shown in FIG. 6(b), the user passes the rising portion 15 of the first body portion 1 through the through-hole H, and further passes the rising portion 15 through the inside of the second inner peripheral edge 22 of the second body portion 2. Thereafter, as shown in FIG. 6(c), the user clamps the edge of the through-hole H between the first opposing flat surface 13 and the second opposing flat surface 23, and presses the sheet Y with the numerous first side protrusions 131 and second side protrusions 231 provided on each flat surface (clamping process). At this time, the first side protrusions 131 and the second side protrusions 231 may clamp the sheet Y in positions where they abut each other, or may clamp the sheet Y in positions offset from each other so as to form a wavy pattern. In the former configuration, the force that presses the sheet Y is greater at the positions of the protrusions, while in the latter configuration, the portion of the sheet Y sandwiched between the first opposing flat surface 13 and the second opposing flat surface 23 is entirely (closer to uniformly) pressed against each portion of the eyelets X.

[0047] 6(c), the user melts the tip of the rising portion 15 and fixes it to the second outward flat surface 24 of the second body portion 2, thereby forming the locking portion 151. In other words, the first body portion 1 and the second body portion 2 are welded together along the edge of the through hole H (welding process).

[0048] As described above, the user performs each step of attaching the eyelets X to the through holes H of the sheet Y as many times as there are through holes H.

[0049] When removing the eyelet X from the through hole H of the sheet Y, the user inserts a sharp or flat tool or the like between the sheet Y and the first outer peripheral edge 11 or the second outer peripheral edge 21 (or the first protrusion 16, the second protrusion 25), peels the first body portion 1 and the second body portion 2 from the sheet Y, and further separates the first body portion 1 and the second body portion 2. [Explanation of symbols]

[0050] X Eyelet Y-sheet 1 First body part 11 First outer edge 12 First inner edge 13 First opposing plane 131 First side protrusion 14 First outward plane 15 Rising section 151 Locking part 16 First overhang 17 Positioning part 2 Second main body 21 Second outer periphery 22 Second inner periphery 23 Second opposing plane 231 Second side protrusion 24 Second outward plane 25 Second overhang 26 Notch A center axis C Array Circle C1 Inner Circumference Circle C2 Outer array circle D Array spacing D1 Inner circumference spacing D2 Outer circumference spacing E marginal area H through hole R Declination difference R1 Inner circumference deviation angle R2 Outer circumference side declination angle difference

Claims

1. A grommet that can be attached to a through hole provided in a sheet, annular first and second body portions having outer and inner peripheral edges, The first body portion and the second body portion each further have a plurality of protrusions arranged in two or more concentric circles on a single plane, the first body portion and the second body portion are provided so as to be connectable to each other while facing each other on the one plane, The eyelet has an inner circumferential spacing, which is the spacing between adjacent projections on a circle close to the inner circumferential edge, wider than an outer circumferential spacing, which is the spacing between adjacent projections on a circle close to the outer circumferential edge.

2. Regarding the difference in the deflection angles around the center point between the protrusions on the concentric circles, the inner circumferential side spacing is an integer multiple of the outer circumferential side spacing. The eyelet according to claim 1 .

3. The first main body portion further includes a raised portion that rises along the inner circumferential edge, The raised portion is capable of penetrating the inside of the inner peripheral edge of the second main body portion, and further includes a locking portion that locks to the peripheral edge of the inner peripheral edge. The eyelet according to claim 1 .

4. The first main body portion further includes a positioning portion that protrudes from an outer periphery where the raised portion rises, The second main body portion further has a notch portion that can be fitted into the positioning portion. The eyelet according to claim 3.

5. The first main body portion and the second main body portion have protruding portions that protrude further outward from the outer circumferential edge, The thickness of the protruding portion is thinner than the thickness of the first main body portion and the second main body portion. The eyelet according to claim 1 .

6. A sheet comprising the eyelet according to any one of claims 1 to 5.

7. A method for manufacturing a sheet with grommets, a folding step of folding back the peripheral portion of the sheet; a perforation step of drilling through holes along the edge of the folded sheet; a clamping step of clamping an edge portion of the through hole between a first body portion and a second body portion constituting the eyelet and crimping the sheet with a plurality of protrusions of the first body portion and the second body portion; a welding step of connecting the first body portion and the second body portion by welding along an edge portion of the through hole; A manufacturing method comprising:

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