JP5563063B2 - Eyelet attaching device and eyelet attaching method - Google Patents

Description

  The present invention relates to an eyelet attaching device and an eyelet attaching method.

  An annular metal fitting called “eyelet” is used to reinforce the periphery of a hole provided in a portion through which a shoelace is passed, clothing such as a belt, or office supplies such as documents. When attaching this eyelet to the fabric, place the fabric with a hole between the upper mold that holds the eyelet and the lower mold that holds the washer, and hit the upper mold and lower mold to match the eyelet and washer. And was joined. However, since such pre-drilling work has a problem in terms of work efficiency, an apparatus has been proposed for simultaneously performing punching of the fabric and joining of the eyelet and washer.

  For example, in Utility Model Registration No. 2547638, sleeves are provided around the upper and lower molds, respectively. Then, when the dough is cut by pushing down the dough to the lower die side by the protrusion provided on the upper die, the front and back sides of the dough are supported by both sleeves. Thus, there is disclosed a eyelet attachment device that simultaneously performs hole making and eyelet attachment without exerting an excessive pulling force on the hole portion of the cloth.

  In Japanese Patent Laid-Open No. 1-94801, the eyelet is pressed while pressing the tip of the eyelet onto the lower mold, and at the same time, the eyelet is supported while the cloth is supported by the elastic force of the spring provided on the lower mold and the upper mold. And an eyelet attaching device for attaching a washer.

Utility Model Registration No. 2547638 Japanese Patent Laid-Open No. 1-94801

  However, the eyelet attachment device described in Patent Document 1 pushes the cloth into the opening of the lower mold by the protrusion formed on the upper mold, and by the shearing action between the wall of the opening and the wall of the protrusion. The dough is being cut. Therefore, when the fabric thickness is thick, it may be difficult to push the fabric into the lower mold, and the usable fabric thickness is limited. On the other hand, even if a thick fabric can be pushed into the base, it is necessary to apply a strong load from the upper die to the lower die in order to push the thick fabric into the lower die. At this time, pressure may be applied to the peripheral region of the washer hole, and deformation may occur in the peripheral region of the washer hole. Alternatively, when the fabric is pushed into the opening, the washer may be misaligned, resulting in poor attachment of the eyelet.

  On the other hand, since the eyelet attachment device described in Patent Document 2 cuts the fabric by the compressive pressure between the tip of the eyelet and the lower mold, there is no need to push the fabric into the opening, and there are various types and thicknesses. Eyelets can be attached to the fabric. However, in Patent Document 2, when the eyelet is pressed with the upper mold, the tip of the eyelet pushes up the washer (washer), and the washer floats from the lower mold and becomes unstable. For this reason, the peripheral region of the hole of the washer may be deformed, or the washer itself may be displaced, resulting in poor attachment of the eyelet.

  In view of the above problems, the present invention provides an eyelet attachment device and an eyelet attachment method capable of suppressing deformation or misalignment of the peripheral region of the hole of the washer and suppressing attachment failure of the eyelet.

  In order to solve the above-described problems, in one aspect, the present invention has an eyelet and a hole joined to the eyelet, is continuous with a hole edge and a hole edge surrounding the hole, and is radial from the hole edge. An eyelet attachment device for attaching an eyelet and a washer onto a base material by sandwiching the base material between a washer having an outer edge portion extending outward, and an upper mold for arranging the eyelet, and an axis facing the eyelet A sleeve that is slidably attached to the outer periphery of the shaft portion along the axial direction of the shaft portion, holds a washer, and a lower mold including an elastic member that biases the sleeve in the upper mold direction, The shaft portion is provided on the upper surface of the shaft portion along the outer periphery of the shaft portion, and supports a hole edge portion supporting surface that supports the hole edge portion of the washer, and upward from the hole edge portion supporting surface toward the center of the shaft portion. Inclined and acting with the tip of the eyelet substrate An eyelet attached device and a working surface for cutting.

  In one embodiment of the eyelet attachment device according to the present invention, the sleeve is an annular body having a hole through which the shaft portion is passed, and is formed along the edge of the hole, and is an annular groove portion that accommodates the outer edge portion of the washer. Is provided.

  In one embodiment of the eyelet attachment device according to the present invention, the sleeve is formed so as to be shallower than the first groove on the inner peripheral side of the first groove and the annular first groove that accommodates the outer edge portion of the washer. And an annular second groove.

  In another aspect, the present invention includes an eyelet, a hole joined to the eyelet, and a hole edge that surrounds the hole and an outer edge that is continuous with the hole edge and extends radially outward from the hole edge. An eyelet attachment method for attaching an eyelet and a washer on a base material by sandwiching the base material between a washer and a washer provided with an upper die for arranging the eyelet, a shaft portion facing the eyelet, and an outer periphery of the shaft portion A sleeve that is slidably mounted along the axial direction of the shaft portion, and that holds a washer, and a lower die that includes an elastic member that urges the sleeve in the direction of the upper mold. A hole edge support surface that is provided on the upper surface of the shaft along the outer periphery of the shaft and supports the hole edge of the washer, and is inclined upward from the hole edge support surface toward the center of the shaft, and the tip of the eyelet And a working surface that cuts the base material. The step of sandwiching the base material between the upper mold and the lower mold of the eyelet attaching device, the upper mold and the lower mold are brought close to each other, the base is pressed by the tip of the eyelet, and the pressed base The upper surface of the hole edge of the washer is pressed to move the washer downward together with the sleeve, and the hole edge is supported on the hole edge support surface, and the hole edge is supported on the hole edge support surface. In this state, the step of further pressing the base material with the tip of the eyelet to cut the base material on the working surface, and after cutting, when the sleeve with the washer is moved upward by the urging of the elastic member, The eyelet attachment method includes a step of inserting the tip of the eyelet into a space formed between the edge and the hole edge support surface and joining the washer and the eyelet.

  In one embodiment of the eyelet attachment method according to the present invention, the step of cutting the base material on the working surface is a state in which the upward pressure of the sleeve on which the washer is disposed is urged to the base material through the hole edge of the washer. Then, it is cut by applying a downward pressure that presses the substrate with the tip of the eyelet.

  ADVANTAGE OF THE INVENTION According to this invention, the deformation | transformation or position shift of the periphery area | region of the hole of a washer can be suppressed, and the eyelet attachment apparatus and eyelet attachment method which can suppress the attachment failure of an eyelet can be provided.

FIG. 1 is a cross-sectional view showing an eyelet attachment device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the arrangement of the upper mold, eyelet, base material, washer, and lower mold of the eyelet attachment device according to the embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state where the upper mold is lowered and the base material is sandwiched between the upper mold and the lower mold when the eyelet is attached. FIG. 4 is a cross-sectional view showing a state where the tip of the eyelet pushes the base material when the eyelet is attached. FIG. 5 is a cross-sectional view showing a state where the tip of the eyelet bites into the base material and cuts the base material when the eyelet is attached. FIG. 6 is a cross-sectional view showing a state in which an eyelet and a washer are joined and fixed to the front and back of the base material when the eyelet is attached. FIG. 7 is a cross-sectional view showing an eyelet attachment device according to a first modification of the embodiment of the present invention. FIG. 8 is a cross-sectional view showing a state in which the tip of the eyelet pushes the base material when the eyelet attachment device shown in FIG. 7 is attached to the eyelet. FIG. 9 is a cross-sectional view showing a state where the tip of the eyelet is rounded by the recess and joined to the washer when the eyelet attaching device shown in FIG. 7 is attached. FIG. 10 is a cross-sectional view showing an eyelet attachment device according to a second modification of the embodiment of the present invention. FIG. 11 is a cross-sectional view showing an eyelet attachment device according to a third modification of the embodiment of the present invention. FIG. 12 is a cross-sectional view showing an eyelet attachment device according to a fourth modification of the embodiment of the present invention.

  Embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. The following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is to change the structure, arrangement, etc. of components to the following. Not specific.

  As shown in FIG. 1, the eyelet attachment device 1 according to the embodiment of the present invention supports an upper mold 20 in which an eyelet 3 is disposed, and a washer 4 that faces the upper mold 20 and is joined to the eyelet 3. And a lower mold 10 to be provided. A groove-shaped guide 26 for fixing the eyelet 3 is provided at the lower end of the upper mold 20.

  The eyelet 3 has a cylindrical main body 3a and a flange 3b extending from the outer peripheral edge of the base end portion of the main body 3a toward the outer side in the radial direction of the main body 3a. The flange 3 b of the eyelet 3 is supported by the guide 26 of the upper mold 20. As shown in FIG. 2, the washer 4 has a hole 4 a in the center, is continuous with the annular hole edge 41 surrounding the hole 4 a, the hole edge 41, and has a radius from the hole edge 41. An outer edge portion 42 extending outward in the direction is provided, and a protruding portion 42 a (see FIG. 3) is provided on the outer edge portion 42 so as to protrude convexly toward the front side of the washer 4. As the eyelet 3 and the washer 4, various metal commercially available parts can be used. The substrate 2 is not particularly limited as long as it is a sheet-like material such as a cloth, paper, synthetic resin, or rubber thin plate.

  The lower mold 10 is attached to the shaft portion 11 facing the eyelet 3 and the outer periphery of the shaft portion 11 so as to be slidable along the axial direction of the shaft portion 11 (the direction of arrow A in FIG. 1), and supports the washer 4. And an elastic member 13 that is connected between the shaft portion 11 and the sleeve 12 and biases the sleeve 12 toward the upper mold 20. The shaft portion 11 has a cylindrical shape, and an annular cutout portion 110 is formed at an end portion (upper end) on the side facing the upper mold 20. The sleeve 12 is accommodated in the notch portion 110 and slides in the notch portion 110 by the elastic force of the elastic member 13. The sleeve 12 is an annular body having a hole 121 through which the shaft portion 11 is passed and having a central axis (not shown) coaxially with the central axis of the shaft portion 11. The elastic member 13 is not particularly limited as long as it is a material that accumulates elastic energy. For example, various elastic members such as a spring (coil spring, leaf spring) and rubber are used.

  As shown in FIG. 3, the shaft portion 11 has a convex shape in the direction of the upper mold 20 so that the cross section thereof has a trapezoidal shape. The upper surface of the shaft portion is provided along the outer periphery of the shaft portion 11 and supports the hole edge portion support surface 16 that supports the hole edge portion 41 of the washer 4, and the hole edge portion support surface 16 toward the center of the shaft portion 11. The working surface 15 which inclines upward and acts with the front-end | tip of the eyelet 3 and cut | disconnects the base material 2 and the base material support surface 14 for supporting the base material 2 at the time of attachment of an eyelet are included.

  As shown in FIG. 1, the base material support surface 14 is a horizontal plane that is connected to the upper end of the working surface 15 and extends in a direction perpendicular to the axial direction of the shaft portion 11 at the center of the shaft portion 11. By having the horizontal base material support surface 14, when the base material 2 is cut, the posture of the base material 2 is maintained in an appropriate posture. In order to ensure the support of the base material 2 when the base material 2 is cut, the base material support surface 14 may be subjected to uneven processing or the like on the surface. Moreover, the action surface 15 may have a curved surface shape.

  As shown in FIG. 5, the hole edge supporting surface 16 is formed by the washer 4 extending from the sleeve 12 toward the shaft 11 when the base 2 is cut by pressing the tip of the eyelet 3 against the working surface 15. It functions as a support area for supporting the hole edge 41. By providing the hole edge portion support surface 16 on the shaft portion 11, the hole edge portion 41 of the washer 4 is fixed between the base material 2 and the hole edge portion support surface 16, so that displacement of the washer 4 can be suppressed. . The hole edge support surface 16 only needs to have an area enough to support a part of the hole edge 41. The hole edge support surface 16 can be shaped to match the shape of the hole edge 41 of the washer 4. For example, when the hole edge portion 41 has a flat plate shape as shown in FIG. 5, the hole edge portion support surface 16 may be arranged in parallel to the upper surface of the substrate support surface 14. When the hole edge 41 is formed with an angle, the hole edge support surface 16 may be inclined according to the angle of the hole edge 41.

  As shown in FIG. 2, the sleeve 12 includes a groove portion 171 that accommodates the outer edge portion 42 of the washer 4 on the upper surface facing the upper mold 20. The groove portion 171 includes an annular first groove 17 that supports the raised portion 42 a of the outer edge portion 42, and an annular first groove formed along the edge of the hole 121 of the sleeve 12 on the inner peripheral side of the first groove 17. Two grooves 18 are provided. As shown in FIG. 1, the first groove 17 has a bottom surface that matches the contour shape of the raised portion 42a, and fixes the washer 4 at a predetermined position. At this time, as shown in FIG. 1, the hole edge portion 41 of the washer 4 is disposed so as to slightly extend above the shaft portion 11 above the second groove 18. The second groove 18 is formed shallower than the first groove 17. The bottom surface of the second groove 18 is arranged so as to be continuous on the same plane as the hole edge support surface 16 of the shaft portion 11 when the sleeve 12 is at the movement upper limit position (position shown in FIGS. 1 and 2). Is done. When the sleeve 12 is in the movement upper limit position, a gap 161 (see FIG. 1) is provided between the hole edge 41 and the hole edge support surface 16. Further, a space 19 defined by the bottom surface of the second groove 18, the outer edge portion 42 of the washer 4 and the hole edge portion 41 is formed in the second groove 18. By having these configurations, it is possible to easily cause the tip of the eyelet 3 cut from the base material 2 to slide into the space 19 from the working surface 15 through the gap 161.

  Next, a method for attaching eyelets on the front and back of the base material 2 using the eyelet attaching device 1 according to the embodiment of the present invention will be described. As shown in FIG. 1, first, the flange 3 b of the eyelet 3 is disposed on the guide 26 of the upper mold 20, and the main body 3 a is opposed to the lower mold 10. On the other hand, the outer edge portion 42 of the washer 4 is disposed in the first groove 17 of the sleeve 12 of the lower mold 10. The base material 2 is disposed between the upper mold 20 and the lower mold 10.

  As shown in FIG. 3, the upper mold 20 is lowered toward the lower mold 10, and the tip of the eyelet 3 is brought into contact with the substrate 2. Thereby, the back surface (lower) side of the base material 2 is disposed on the base material support surface 14 of the shaft portion 11 and the hole edge portion 41 of the washer 4. When the upper mold 20 is further lowered toward the lower mold 10, the tip of the main body 3 a of the eyelet 3 bites into the base material 2. As the upper mold 20 is further lowered and pressed, the base 2 presses the upper surface of the hole edge 41 of the washer 4. Due to the downward force applied to the base material 2, the sleeve 12 holding the washer 4 slides downward while holding the washer 4 while contracting the elastic member 13 against the elastic force of the elastic member 13. The lower surface of the hole edge portion 41 of the washer 4 gradually approaches the hole edge portion support surface 16 of the shaft portion 11 while narrowing the gap 161 between the hole edge portion 41 and the hole edge portion support surface 16, As shown in FIG. 4, the hole edge support surface 16 is finally contacted. At this time, the gap 161 is completely closed. In this way, the washer 4 is supported on the hole edge support surface 16, so that deformation in the vicinity of the hole edge 41 of the washer 4 due to the pressing of the upper mold 20 is suppressed.

  Next, as shown in FIG. 5, with the hole edge 41 supported on the hole edge support surface 16, the upward pressure of the sleeve 12 supporting the washer 4 is applied via the hole edge 41 of the washer 4. While energizing the base material 2, the upper mold 20 is further lowered, the base material 2 is further pressed against the working surface 15 by the tip of the eyelet 3, and the base material 2 is cut on the working surface 15 by compressive stress.

  When the base material 2 is cut, the sleeve 12 is released from the downward pressure from the upper mold 20 acting on the washer 4 through the base material 2, so that the elastic member 13 is elastic. Due to the force, it gradually moves upward (direction C in FIG. 5). As a result, the hole edge 41 is separated from the hole edge support surface 16. Thereafter, the upper mold 20 is further lowered to move the tip of the eyelet 3 outward in the radial direction of the shaft portion 11 (B direction in FIG. 5). That is, by sliding the tip of the eyelet 3 from the working surface 15 through the hole edge support surface 16 into the space 19 below the hole edge 41, as shown in FIG. The hole edge 41 of the washer 4 is joined. As a result, the eyelet 3 and the washer 4 are smoothly joined without applying excessive pressure to the hole edge 41 of the washer 4.

  According to the eyelet attachment device 1 according to the embodiment of the present invention, the sleeve 12 holds the washer 4 downward by the action of the elastic member 13 when the base member 2 is cut by pressing on the shaft portion 11. Since it moves, the deformation of the washer 4 can be suppressed. Moreover, since the hole edge part support surface 16 for supporting the hole edge part 41 of the washer 4 is arrange | positioned at the axial part 11, even when the base material 2 which generate | occur | produces a strong stress is cut | disconnected a hole edge part. The support surface 16 is in contact with the lower surface of the hole edge portion 41 of the washer 4 and supports the pressure applied to the upper surface of the hole edge portion 41 of the washer 4 from the upper mold 20 through the base material 2. Therefore, even if a strong force is applied when cutting a thick fabric, the positional displacement of the washer 4 can be suppressed, and the attachment failure between the eyelet 3 and the washer 4 is reduced. Since the stress applied to the washer 4 is also reduced as compared with the conventional case, the washer 4 can be thinned. Furthermore, even when the eyelet 3 and the washer 4 are joined after the base material 2 is cut, the elastic member 13 that biases upward force to the sleeve 12 can be surely and smoothly fitted, so It is also possible to suppress entanglement defects and generation of burr-like chips due to contact between the eyelet 3 and the washer 4.

(First modification)
As shown in FIG. 7, the eyelet attachment device 1 a according to the first modification of the embodiment of the present invention further includes a recess 15 a provided between the working surface 15 and the hole edge support surface 16. 1 is different from the eyelet attachment device 1 shown in FIG. The concave portion 15 a has a curved shape that protrudes downward, and is provided continuously with the working surface 15. Others are substantially the same as the configuration shown in FIG.

  When attaching eyelets using the eyelet attaching device 1a shown in FIG. 7, the upper die 20 is further lowered from the state shown in FIG. 7 to the lower die 10 side, and as shown in FIG. Bite into the substrate 2. At this time, the sleeve 12 supporting the washer 4 slides downward while holding the washer 4 by applying a downward force to the hole edge 41 of the washer 4 through the base material 2. The lower surface of the hole edge portion 41 of the washer 4 (a part of the lower surface of the hole edge portion 41 located slightly outside the hole edge 41a in the radial direction) is connected to the upper surface of the hole edge portion support surface 16 of the shaft portion 11. Touch. Thereby, the deformation | transformation of the hole edge part 41 vicinity of the washer 4 by the press of the upper metal mold | die 20 can be suppressed.

  The upper mold 20 is further lowered to press the tip of the eyelet 3 against the working surface 15, and after cutting the substrate 2 on the working surface 15, the upper mold 20 is further lowered to bring the tip of the eyelet 3 into the working surface 15. Then, the eyelet 3 and the washer 4 are joined together by sliding along the concave portion 15a outward in the radial direction of the shaft portion 11 (direction D in FIG. 9). At this time, since the tip of the eyelet 3 is curved by the curved surface of the recess 15a, the bonding strength between the eyelet 3 and the washer 4 is increased, and burrs are hardly generated during the bonding.

  The concave portion 15a is not necessarily a curved shape, and may be a flat surface. That is, the concave portion 15a can achieve the purpose as long as the tip of the eyelet 3 can be bent, and the shape thereof is not limited to the example shown in FIG. As another shape example, a groove having a first surface continuous with the inclined surface of the working surface 15 and a second surface continuous with the first surface and having an inverted triangular cross section is related to the present embodiment. It can be included as a recess 15a. Further, the concave portion 15a may be a polyhedral concave groove.

(Second modification)
As shown in FIG. 10, the eyelet attachment device 1 b according to the second modification has a bottom surface of the second groove 18 of the sleeve 12 when the sleeve 12 is in the upper limit movement position with respect to the shaft portion 11, that is, in the example of FIG. And the hole edge support surface 16 of the shaft portion 11 are continuously arranged on the same plane, the point that the base material support surface 14 is located above the upper surface of the hole edge portion 41 of the washer 4 is, Different from the eyelet attachment device 1 shown in FIG. According to the eyelet attachment device shown in FIG. 10, when the base 2 is sandwiched between the upper mold 20 and the lower mold 10, the initial pressure transmitted from the upper mold 20 through the base 2 is applied to the base support surface. 14 can be received, it is suppressed that a strong pressure is applied to the hole edge portion 41, and the deformation of the hole edge portion 41 can be prevented in advance.

(Third Modification)
As shown in FIG. 11, the eyelet attachment device 1 c according to the third modified example is different from the eyelet attachment device shown in FIG. 1 in that the base material support surface 14 is an inclined surface inclined toward the center of the shaft portion 11. Different. By making the base material support surface 14 into an inclined surface, the base material support surface 14 bites into the base material when the base material 2 is cut, and the base material 2 can be easily cut.

(Fourth modification)
As shown in FIG. 12, in the eyelet attachment device 1d according to the fourth modification, the sleeve 12 is formed along the edge of the hole 121 through which the shaft portion 11 is passed, and accommodates the outer edge portion 42 of the washer 4. The shape of the groove portion 171 is different from the eyelet attachment device shown in FIG. That is, in the eyelet attachment device 1 in FIG. 1, the posture of the washer 4 is more stably maintained by having two grooves (the first groove 17 and the second groove 18) having different depths. . However, as shown in FIG. 12, if the sleeve 12 has one groove portion 171 for accommodating the outer edge portion 42 of the washer 4, a certain purpose can be achieved. According to the eyelet attachment device 1d shown in FIG. 12, the configuration of the sleeve 12 is simplified.

  Although the embodiments of the present invention have been described as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. As described above, the present invention naturally includes various modes that are not explicitly described herein, and can be embodied by being modified without departing from the scope of the invention when it is practiced.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c, 1d ... Eyelet attaching apparatus 2 ... Base material 3 ... Eyelet 4 ... Washer 10 ... Lower mold | die 11 ... Shaft part 12 ... Sleeve 13 ... Elastic member 14 ... Support surface 15 ... Action surface 15a ... Concave part DESCRIPTION OF SYMBOLS 16 ... Support surface 17 ... 1st groove | channel 18 ... 2nd groove | channel 19 ... Space 20 ... Upper metal mold 26 ... Guide 3a ... Main body 3b ... Flange 4a ... Hole 41 ... Hole edge part 42 ... Outer edge part 110 ... Notch part 121 ... Hole 161 ... Gap 171 ... Groove

Claims (5)

The eyelet (3) has a hole (4a) joined to the eyelet (3) and is continuous with the hole edge (41) and the hole edge (41) surrounding the hole (4a). A base material (2) is sandwiched between a washer (4) having an outer edge portion (42) extending radially outward from the hole edge portion (41), and the eyelet (3) is placed on the base material (2). ) And the eyelet attaching device (1, 1a, 1b, 1c, 1d) for attaching the washer (4),
An upper mold (20) for disposing the eyelet (3);
A shaft portion (11) facing the eyelet (3) and an outer periphery of the shaft portion (11) are slidably attached along the axial direction of the shaft portion (11), and hold the washer (4). A sleeve (12), and a lower mold (10) including an elastic member (13) for urging the sleeve (12) in the direction of the upper mold (20),
The shaft portion (11) is
A hole edge support surface (16) provided on the upper surface of the shaft portion (11) along the outer periphery of the shaft portion (11) and supporting the hole edge portion (41) of the washer, and the hole edge portion support surface ( An action surface (15) that is inclined upward from 16) toward the center of the shaft portion (11) and acts on the tip of the eyelet (3) to cut the base material (2),
The sleeve (12) has a position where the hole edge (41) of the washer (4) held by the sleeve (12) contacts the hole edge support surface (16), and the hole edge (41) is a hole edge. A grommet attachment device (1, 1a, 1b, 1c, 1d) characterized in that it can be displaced between the part support surface (16) and a separated position.
  The sleeve (12) is an annular body having a hole (121) through which the shaft portion (11) is passed, and is formed along the edge of the hole (121), and the outer edge portion (42) of the washer (4). The eyelet attaching device (1, 1a, 1b, 1c, 1d) according to claim 1, further comprising an annular groove portion (171) for accommodating the eyelet. The sleeve (12)
An annular first groove (17) for accommodating the outer edge (42) of the washer (4);
The annular second groove (18) formed shallower than the first groove (17) on the inner peripheral side of the first groove (17). Eyelet attachment device (1, 1a, 1b, 1c, 1d). The eyelet (3) has a hole (4a) joined to the eyelet (3) and is continuous with the hole edge (41) and the hole edge (41) surrounding the hole (4a). A base material (2) is sandwiched between a washer (4) having an outer edge portion (42) extending radially outward from the hole edge portion (41), and the eyelet (3) is placed on the base material (2). ) And the eyelet attaching method for attaching the washer (4),
An upper mold (20) for disposing the eyelet (3), a shaft portion (11) facing the eyelet (3), and an outer periphery of the shaft portion (11) along the axial direction of the shaft portion (11). A lower mold comprising a sleeve (12) that is slidably mounted and holds the washer (4), and an elastic member (13) that biases the sleeve (12) toward the upper mold (20). (10), and the shaft portion (11) is provided on the upper surface of the shaft portion (11) along the outer periphery of the shaft portion (11), and supports the hole edge portion (41) of the washer. Part support surface (16) and tilted upward from the hole edge support surface (16) toward the center of the shaft part (11), acting on the tip of the eyelet (3) to cause the base material (2) The upper metal of the eyelet attaching device (1, 1a, 1b, 1c, 1d) provided with a working surface (15) for cutting A step of sandwiching the substrate (2) between (20) and said lower die (10),
The upper mold (20) and the lower mold (10) are brought close to each other, the base (2) is pressed by the tip of the eyelet (3), and the washer (2) is pressed by the pressed base (2). 4) The upper surface of the hole edge (41) is pressed to move the washer (4) downward together with the sleeve (12), and the hole edge (41) contacts the hole edge support surface (16) . And letting it support,
In the state where the hole edge portion (41) is supported on the hole edge portion supporting surface (16), the substrate (2) is further pressed by the tip of the eyelet (3). Cutting on the working surface (15);
After cutting, when the sleeve (12) having the washer (4) is moved upward by the urging of the elastic member (13), the hole edge (41) and the hole edge support surface ( 16) including a step of inserting the tip of the eyelet (3) into a space formed apart from the eyelet (3) and joining the washer (4) and the eyelet (3). Method. Cutting the substrate (2) on the working surface (15),
In the state where the upward pressure of the sleeve (12) where the washer (4) is disposed is urged to the base material (2) through the hole edge (41) of the washer (4), the eyelet ( The eyelet attachment method according to claim 4, wherein cutting is performed by applying a downward pressure that presses the base material (2) with the tip of 3).

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