JP5543017B2 - Eyelet attaching device and eyelet attaching method - Google Patents

Description

  The present invention relates to an eyelet attachment device and an eyelet attachment method, and more specifically, to apply the eyelet body from one side of the fabric and the washer from the other side of the fabric, and attach the eyelet body and the washer to the fabric as eyelets. The eyelet attaching device and the eyelet attaching method.

  Eyelets are often used to form circular holes in the fabric for ventilation, shoelaces, and the like. In general, the eyelet penetrates a part of the eyelet main body (eyelet) from the upper surface side to the lower surface side of the horizontally arranged fabric, and then engages with a washer (washer) on the lower surface side of the fabric. By attaching the eyelet body and the washer together, it is attached to the fabric. An eyelet attaching device is used for attaching the eyelet to the cloth. The eyelet attachment device generally includes an upper die for holding the eyelet main body, a lower die on which a washer is placed, and a mechanism for raising and lowering the upper die. Then, the above-described eyelet attachment is performed by lowering the upper die toward the lower die. An example of a conventional eyelet attachment device is disclosed in Japanese Patent Laid-Open No. 1-94801. In this eyelet attachment device, the fabric is cut at the tip of the post part of the eyelet main body held by the upper die, and then the post part is bent from the radially outer side upward by the annular concave part of the lower die. .

  However, for example, in the case of a cloth that is relatively thin and difficult to cut, in the conventional eyelet attachment device, the tip of the post part of the eyelet body excessively takes the cloth downward, and when the attachment of the eyelet is completed, There was also a risk that unsightly wrinkles would occur in the surrounding area, or the post portion could not buckle and could buckle.

Japanese Patent Laid-Open No. 1-94801

  The present invention has been made in view of the above points, and an object of the present invention is to provide an eyelet attachment device in which the cloth can be easily and reliably cut by the tip of the post portion of the eyelet main body when the eyelet is attached to the cloth. There is.

  In order to solve the above-described problem, according to the present invention, after passing the cylindrical post portion of the eyelet main body from one side of the fabric to the other side, by crimping together with the washer on the other side of the fabric, An eyelet attachment device for attaching the eyelet main body and the washer to the cloth as an eyelet, comprising: a first die for holding the eyelet main body; and a second die arranged concentrically with the first die for holding the washer. The first die or the second die can be moved concentrically toward the second die or the first die, and the second die includes a cylindrical shaft portion, and a cylindrical sleeve portion surrounding the shaft portion. The shaft portion receives the tip of the post portion of the eyelet main body and has an annular inclined surface for curving the post portion radially outward, and the sleeve portion has a radially outer portion of the washer. An annular recess to be accommodated The shaft portion and the sleeve portion are relatively pushed from the first die side when the eyelet main body and the washer are attached to the cloth, so that the first die pushes the second die relatively. An eyelet attachment device is provided that is elastically displaceable independently, and the second die includes a stopper that limits the amount of elastic displacement of the shaft portion.

  In the present invention, the “fabric” to which the eyelet is attached includes woven fabric, cloth, non-woven fabric, felt, leather, resin sheet and the like. The eyelet attachment device according to the present invention is considered to be particularly suitable for attaching eyelets to a cloth having a thickness of 0.5 mm or less.

  In the eyelet attachment device according to the present invention, in general, the first die is disposed above, the second die is disposed below, and the first die is lowered with respect to the second die. There may be a form in which the two dies are disposed above, the first die is disposed below, and the first die is raised with respect to the second die. In the following description, the first die is disposed above, the second die is disposed below, and the first die is lowered with respect to the second die.

  In the present invention, the eyelet main body is held by the upper first die, the washer is placed on the lower second die, the dough is horizontally arranged between the eyelet main body and the washer, and then the first die is used as the second die. Descent toward. Thereby, first, the tip of the post part of the eyelet body presses the fabric against the inclined surface of the shaft part of the second die, and the post part then pushes the shaft part downward through the inclined surface, so that the shaft part is lowered. During the lowering of the shaft portion, the fabric is substantially cut and penetrated by the tip of the post portion of the eyelet main body. When the downward displacement of the shaft portion is limited by the stopper, the sleeve portion elastically moves downward by pressing from the first die side, and the eyelet main body and the post portion are crimped while the sleeve portion is being lowered. Practically done.

  In one embodiment of the present invention, the shaft portion includes a metallic shaft body having the inclined surface, and a shaft elastic body that supports the shaft body, and the sleeve portion includes the recess. And a sleeve elastic body that supports the die sleeve. As the shaft elastic body and the sleeve elastic body, a spring, rubber or the like can be used. It should be noted that the sleeve elastic body can be designed to be more easily deformed than the shaft elastic body. As another form, the whole sleeve part may be formed with an elastic body.

  In one embodiment of the present invention, the stopper is disposed concentrically with the shaft portion, and the shaft portion includes a cavity into which the stopper is inserted, and the shaft portion is guided by the stopper and the cavity. The stopper serves as a guide for moving the shaft portion concentrically as well as restricting the downward movement of the shaft portion.

  According to another aspect of the present invention, the cylindrical post portion of the eyelet body is penetrated from one side of the fabric to the other side, and then inserted into the hole of the washer on the other side of the fabric, and then added together with the washer. An eyelet attachment device for attaching the eyelet main body and the washer to the fabric as an eyelet by tightening, and a first die for holding the eyelet main body and a second die arranged concentrically with the first die for holding the washer. The first die or the second die is concentrically movable toward the second die or the first die, and the second die is a cylindrical shaft portion and a cylindrical shape surrounding the shaft portion. The shaft portion receives the tip of the post portion of the eyelet main body and has an annular inclined surface for curving the post portion radially outward, and the sleeve portion is formed on the washer. Radially outside the hole The sleeve has a ring-shaped recessed portion in which the first die is relatively pushed from the side of the first die when the eyelet body and the washer are attached to the cloth, so that the first die moves relative to the second die. An eyelet attachment device is provided that is elastically displaceable in a pushing direction and that the shaft portion can abut against the peripheral edge of the hole of the washer.

  In the present invention, the peripheral edge of the hole of the washer can be brought into contact with the shaft portion of the second die, and the radially outer portion is received in the concave portion of the sleeve portion of the second die and comes into contact with the shaft portion of the washer. The washer is held across the shaft portion and the sleeve portion of the second die. Therefore, compared with the case where the washer is supported only at the shaft portion as in the eyelet attachment device described in Japanese Patent Laid-Open No. 1-94801, the post portion of the eyelet main body is cut by the post portion and the post portion is swaged thereafter. At the time of deformation, the shaft portion and the sleeve portion can be relatively displaced separately to allow suitable operation of the second die. Therefore, the eyelet can be securely attached.

  In one embodiment of the present invention, the shaft portion is relatively pushed from the first die side when the eyelet body and the washer are attached to the cloth, so that the first die relatively pushes the second die. Further, it can be elastically displaced independently of the sleeve portion. In this case, the shaft portion and the sleeve portion can be optimally operated when the dough is cut by the post portion of the eyelet main body or when the post portion is swaged and deformed thereafter.

  According to yet another aspect of the present invention, the cylindrical post portion of the eyelet main body held by the first die is penetrated from one side of the fabric to the other side, and then the second die on the other side of the fabric. The eyelet attachment method for attaching the eyelet main body and the washer to the fabric as eyelets by caulking together with the washer held in the inner part, wherein the second die has a columnar shaft portion and a cylindrical shape surrounding the shaft portion. The shaft portion receives the tip of the post portion of the eyelet main body and has an annular inclined surface for curving the post portion radially outward, and the second die is relative to the first die. The shaft portion is elastically displaced in the direction in which the first die relatively pushes the second die, and after the shaft portion displacement step, the sleeve portion is elastic in the direction. A sleeve displacing step that displaces automatically, and the shaft portion In position step, eyelet attachment method the tip of the post portion of the eyelet body to cut the dough while pressing relative to the inclined surface of the shaft portion of the dough is provided.

  In the present invention, the eyelet main body is held by the upper first die, the washer is placed on the lower second die, the dough is horizontally arranged between the eyelet main body and the washer, and then the first die is used as the second die. Descent toward. Thereby, first, the tip of the post part of the eyelet body presses the fabric against the inclined surface of the shaft part of the second die, and the post part then pushes the shaft part downward through the inclined surface, so that the shaft part is lowered. It is elastically displaced. During this shaft part displacement process, the cutting and penetration of the cloth by the tip of the post part of the eyelet main body is substantially performed. After the shaft displacement step, the sleeve portion elastically moves downward by pressing from the first die side, and the eyelet main body and the post portion are substantially crimped during the sleeve displacement step.

  In the present invention, when attaching the eyelet main body and the washer to the cloth, the cutting of the cloth by the tip of the post part of the eyelet main body is performed while the shaft part is pushed by the post part on the inclined surface of the shaft part and displaced. Therefore, the fabric can be easily and reliably cut by the tip of the post portion, and there are almost no situations in which the fabric is unsightly wrinkled or the post portion buckles.

FIG. 1 is a perspective explanatory view showing an eyelet main body and a washer which are opposed to each other up and down across the cloth. FIG. 2 is a longitudinal cross-sectional explanatory view showing an upper die and a lower die, which are waist portions of the eyelet attachment device according to one embodiment of the present invention, together with the fabric, eyelet main body and washer. FIG. 3 is a partial cross-sectional explanatory view showing a state immediately before the eyelet main body held by the upper die being lowered comes into contact with the cloth when the eyelet main body and the washer are attached to the cloth. FIG. 4 is a partial cross-sectional explanatory view showing a state in which the post portion of the eyelet body pushes down the cloth when the eyelet body and the washer are attached to the cloth. FIG. 5 is a partial cross-sectional explanatory view showing a state immediately after the post portion of the eyelet main body cuts the cloth when the eyelet main body and the washer are attached to the cloth. FIG. 6 is a partial cross-sectional explanatory view showing a state in which the shaft main body of the lower die is pushed down to the lowest position when the eyelet main body and the washer are attached to the fabric. FIG. 7 is a partial cross-sectional explanatory view showing a state where the die sleeve is pushed down and the post portion of the eyelet main body is curved when the eyelet main body and the washer are attached to the cloth. FIG. 8 is a partial cross-sectional explanatory view showing a state where the attachment of the eyelet main body and the washer to the fabric is completed. FIG. 9 is a cross-sectional explanatory view showing a deformed eyelet main body and a washer constituting an annular eyelet attached to the cloth. FIG. 10 is an enlarged cross-sectional view of a part of FIG. FIG. 11 is a plan view showing a modified example of the washer. 12 is an explanatory view of a longitudinal section of the washer of FIG. FIG. 13 is a longitudinal cross-sectional explanatory view similar to FIG. 2 showing a modified example of the lower die. FIG. 14 is a cross-sectional view showing still another modification of the lower die.

  Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective explanatory view showing the eyelet main body (eyelet) 10 and the washer (washer) 20 constituting the eyelet attached to the fabric 1 by the eyelet attaching device according to the present invention. FIG. 2 is an explanatory longitudinal cross-sectional view schematically showing the upper die 31 and the lower die 40, which are the main parts of the eyelet attachment device 30 according to an embodiment of the present invention, together with the eyelet main body 10, the fabric 1 and the washer 20. . The fabric 1 is, for example, a relatively hard fiber having a thickness of 0.5 mm or less, natural fibers such as hemp; chemical fibers such as nylon, polyester, rayon, and vinylon; aramid fibers, Teflon (registered trademark) fibers, high-strength polyethylene It may be a high-performance fiber such as a fiber, PBO fiber, or conductive fiber. The eyelet main body 10 and the washer 20 are formed by drawing a metal plate made of a copper alloy, an aluminum alloy or the like, and can be preferably fixed to a relatively thin cloth of 0.5 mm or less as will be described later. The eyelet main body 10 includes a cylindrical post portion 11 and an annular flange portion 12 extending radially outward from a base end (upper side end in FIG. 2) of the post portion 11. Hereinafter, the vertical direction is based on FIG. The post portion 11 is open at both the upper and lower ends. The post portion 11 also has a substantially constant inner diameter from the base end to the tip end 11a, and the thickness is gradually reduced, and the tip end 11a of the post portion 11 becomes sharp. The outer diameter of the post portion 11 is slightly reduced from the proximal end to the distal end 11a. The flange portion 12 extends outward in the radial direction while curving so as to be convex upward (concave downward) from the base end of the post portion 11, and the intermediate portion between the inner end and the outer end 12a in the radial direction of the flange portion 12 is It is the top position. The outer end 12a is slightly below the uppermost position. The washer 20 includes a cylindrical portion 21 and an annular outer peripheral portion 22 that extends radially outward from the lower end of the cylindrical portion 21. The washer 20 is formed with a hole portion 21a surrounded by a cylindrical portion 21, and the post portion 11 of the eyelet main body 10 can be inserted into the hole portion 21a. The height of the cylindrical portion 21 of the washer 20 (vertical direction, that is, the length along the axial direction of the washer 20) is about ½ to the height of the post portion 11 of the eyelet main body 10 from the uppermost end of the flange portion 12. About 1/3. The inner diameter of the cylindrical portion 21 is constant, slightly larger than the outer diameter of the lower end portion of the post portion 11 of the eyelet main body 10, and substantially the same as the outer diameter of the upper end portion of the post portion 11. The outer peripheral portion 22 is formed such that an annular peak portion 22a that protrudes upward from the lower end of the cylindrical portion 21 radially outward and an annular valley portion 22b that protrudes downward continue in a waveform. The peak portion 22a defines an annular first receiving portion 23a that opens downward, and the valley portion 22b defines an annular second receiving portion 23b that opens upward. A large number of grooves 24 along the axial direction are provided on the inner peripheral surface of the cylindrical portion 21 at predetermined angular intervals. The cylindrical portion 21 has a thin portion corresponding to the groove 24, so that at least some of the grooves are formed when the eyelet main body 10 and the washer 20 are attached to the fabric 1 described later (hereinafter also simply referred to as “eyelet attachment”). 24 is configured to be at least partially ruptured.

  The eyelet attaching device 30 includes an upper die (first die) 31 made of metal such as steel on which the eyelet main body 10 is held, a lower die (second die) 40 on which the washer 20 is placed, and an upper die 31. And a mechanism (not shown) for moving up and down. The upper die 31 has a cylindrical shape with a lower portion shown in the figure having substantially the same diameter as the eyelet main body 10, and has an annular recess 32 on the bottom surface 32 a that matches the flange portion 12 of the eyelet main body 10. The eyelet main body 10 is held by the upper die 31 by engaging the flange portion 12 with the recess 32 of the upper die 31. The lower die 40 includes a substantially columnar shaft portion 41, a substantially cylindrical sleeve portion 45 surrounding the shaft portion 41, and a base portion 49 that supports the shaft portion 41 and the sleeve portion 45 from below. The lower die 40 is arranged concentrically with the upper die 31, and the upper die 31 is movable along the concentric axis in a direction approaching the lower die 40. The shaft portion 41 includes a shaft portion main body 42 made of metal such as an upper steel, and a cylindrical shaft portion elastic body 43 that supports the shaft portion main body 42 from below. The shaft portion elastic body 43 is disposed between the shaft portion 41 and the base portion 49. The lower die 40 is disposed concentrically with the shaft portion 41 on the radially inner side of the shaft portion elastic body 43, protrudes from the base portion 49, and is made of columnar stainless steel or the like that restricts the downward displacement of the shaft portion main body 42. A metal stopper 44 is provided. In the upper part of the shaft main body 42 (on the side facing the upper die 30), a central horizontal circular surface 42a and an annular shaft inclined surface whose height gradually decreases radially outward from the periphery of the circular surface 42a. 42b and an annular shaft curved surface 42c whose height is slightly increased while curving further outward in the radial direction from the lower end of the shaft inclined surface 42b. The diameter of the circular surface 42a is slightly smaller than the inner diameter of the post portion 11 of the eyelet main body 10. Therefore, when the eyelet is attached, the tip 11a of the post portion 11 corresponds to the shaft inclined surface 42b (see FIG. 4). When the washer 20 is placed on the upper portion of the shaft body 42, as shown in FIG. 3, the lower end portion of the cylindrical portion 21 and the radially inner end portion of the outer peripheral portion 22 are inclined on the shaft portion curved surface 42c. Comes to side 42b. In the shaft main body 42, the height along the axial direction of the circular surface 42 a from the shaft curved surface 42 c is slightly lower than the height of the cylindrical portion 21 of the washer 20, and thus is placed on the shaft main body 42. When the fabric 1 is stretched horizontally on the washer 20, as shown in FIG. 3, the fabric 1 contacts the upper end of the cylindrical portion 21 of the washer 20, but is slightly separated from the circular surface 42 a of the shaft portion main body 42. A cylindrical cavity 42 d for receiving the stopper 44 is formed at the bottom of the shaft body 42. The shaft elastic body 43 can be formed of a coil spring, rubber, elastic resin, elastic foam or the like. The inner diameter of the shaft elastic body 43 is the same as the diameter of the cavity 42 d of the shaft main body 42, and the outer diameter of the shaft elastic body 43 is slightly smaller than the outer diameter of the shaft main body 42. Therefore, an annular gap is generated between the outer peripheral surface of the shaft elastic body 43 and the inner peripheral surface of the sleeve portion 45 (a sleeve elastic body 48 to be described later). This gap is for allowing elastic deformation of the shaft elastic body 43 outward in the radial direction when the shaft elastic body 43 is compressed in the axial direction when the eyelet is attached (see FIG. 6 and the like). When attaching the eyelet, when the shaft main body 42 is displaced downward while compressing the shaft elastic body 43 in the axial direction, the stopper 44 in a stationary state with respect to the shaft main body 42 gradually enters the cavity 42d of the shaft main body 42. As shown in FIG. 6, when the upper end of the stopper 44 abuts against the upper closed end 42e of the cavity 42d, further downward movement of the shaft body 42 is prevented. The engagement between the cavity 42d of the shaft main body 42 and the stopper 44 also serves as a guide for the shaft main body 42 that is displaced downward. The depth of the cavity 42d, that is, the length along the axial direction is such that the post portion 11 of the eyelet main body 10 is almost as shown in FIG. The tip 11a is set so as to be in contact with the shaft inclined surface 42b of the shaft main body 42 without being deformed.

  The sleeve portion 45 includes an upper die sleeve 46 made of metal such as steel, and a sleeve elastic body 48 that supports the die sleeve 46 from below. The sleeve elastic body 48 is separate from the shaft elastic body 43 and is disposed between the die sleeve 46 and the base portion 49. As such, the shaft elastic body 43 and the sleeve elastic body 48 can be elastically displaced independently. The sleeve elastic body 48 is formed of a coil spring, rubber, elastic resin, elastic foam or the like, and is set so as to be more easily deformed than the shaft elastic body 43. The length of the sleeve elastic body 48 in the moving direction of the upper die 31 (the length in the concentric direction) is longer than the length of the shaft elastic body 43 in the same direction. An annular recess 47 that is recessed from the upper end surface 46 a is provided in the radially inner half of the upper portion of the die sleeve 46. The recess 47 includes a recess outer peripheral surface 47a that is a radially outer end surface parallel to the axis, a recess bottom surface 47b that extends horizontally inward from the lower end of the recess outer surface 47a, and a radius from the radially inner end of the recess bottom surface 47b. It is prescribed | regulated from the recessed part inclined surface 47c which inclines so that height may become low inside a direction. The diameter of the concave portion 47 is slightly larger than the maximum diameter of the outer peripheral portion 22 of the washer 20, and the depth from the concave portion 47 to the concave bottom surface 47b, that is, the axial length from the upper end surface 46a to the concave bottom surface 47b is determined by the washer. 20 slightly exceeds the vertical width of the outer peripheral portion 22. Further, in the initial state of the lower die 40 shown in FIG. 2 (a state in which the downward force from the upper die 31 side is not applied to the shaft elastic body 43 and the sleeve elastic body 48), the bottom surface of the recess in the vertical direction (axial direction). The position 47b is substantially the same position as the shaft curved surface 42c of the shaft body 42. Therefore, when the washer 20 is placed on the lower die 40, the outer peripheral portion 22 of the washer 20 is received in the recess 47 (see FIG. 3). The concave inclined surface 47c bends (curls) the post portion 11 of the eyelet main body 10 along the shaft inclined surface 42b and the shaft curved surface 42c of the shaft main body 42 as shown in FIG. At this time, when the tip end 11a of the post portion 11 is detached from the shaft portion main body 42 in the radial direction and is applied to the die sleeve 46, the post portion 11 is continuously continuous with the shaft portion curved surface 42c. An annular convex portion 46b that protrudes downward is provided in the radially inner portion of the bottom portion of the die sleeve 46, and the convex portion 46b of the die sleeve 46 is fitted in the radially inner portion of the upper portion of the sleeve elastic body 48. An annular recess 48a is provided. In the lower die 40 described above, the cylindrical portion 21 of the washer 20 and its periphery (periphery of the hole portion 21a) are placed on the shaft portion 41, and the outer peripheral portion 22 is placed on the sleeve portion 45 from the outside. As a result, the washer 20 is held by the lower die 40. As shown in FIG. 3, the lower end of the cylindrical portion 21 of the washer 20 (the peripheral edge of the hole portion 21 a) is in contact with the shaft portion 41, and the lower end of the outer peripheral portion 22 (the valley portion 22 b) is in contact with the sleeve portion 45. ing. When the washer 20 is placed on the lower die 40, the lower end of the cylindrical portion 21 may be in contact with the shaft portion 41 and the lower end of the outer peripheral portion 22 may be separated from the sleeve portion 45.

  Next, as an embodiment of the eyelet attaching method according to the present invention, a process of attaching the eyelet main body 10 and the washer 20 to the fabric 1 using the eyelet attaching device 30 described above will be described. First, the eyelet main body 10 is held by the upper die 31, the washer 20 is placed on the lower die 40, the fabric 1 is stretched horizontally on the washer 20, and then the upper die 31 is lowered. FIG. 3 shows a state where the post portion 11 of the eyelet main body 10 is not in contact with the fabric 1 yet. At this time, the shaft portion 41 and the sleeve portion 45 of the lower die 40 are not pressed downward, and the shaft portion 41 and the sleeve portion 45 are in the initial position (initial state). When the upper die 31 is further lowered, as shown in FIG. 4, the tip 11a of the post portion 11 of the eyelet main body 10 abuts against the shaft inclined surface 42b of the shaft main body 42 while entraining the cloth 1 downward. Although the tip 11a of the post portion 11 is sharp, the fabric 1 is relatively difficult to cut, and at this point, the fabric 1 is not cut at least completely. However, if the fabric is relatively easy to cut, it can be cut at this point. Thereafter, the upper die 31 is further lowered, and the post portion 11 of the eyelet main body 10 pushes the shaft main body 42 downward from the shaft inclined surface 42b with the cloth 1 in between, whereby the shaft main body 42 is pivoted. The partial elastic body 43 starts to be displaced downward while being compressed in the axial direction. At this time, the fabric 1 is cut and penetrated as shown in FIG. 5 while pressing the fabric 1 against the shaft inclined surface 42b where the tip 11a of the post portion 11 is displaced downward. Reference numeral 1 a in FIG. 5 and the like is a circular fabric portion cut from the fabric 1. The cutting of the dough 1 by the tip 11a of the post portion 11 is easier and easier when the shaft inclined surface 42b is displaced downward as described above than when the shaft inclined surface 42b is stationary in the vertical direction. It turns out that it can be done reliably. This is because the fabric 1 is pulled downward by the tip 11a of the post portion 11 when the shaft inclined surface 42b is lowered, and the portion of the fabric 1 where the tip 11a of the post 11 hits is lowered on the shaft inclined surface 42b. It is considered that this is because the tip 11a acts so as to rub the fabric 1 on the shaft inclined surface 42b with a slight shift inward or outward in the radial direction. In this way, since even the fabric 1 that is relatively difficult to cut is reliably cut, the post portion 11 of the eyelet main body 10 takes the fabric 1 downward more than necessary, and fixes the eyelet main body 10 and the washer 20 to the fabric 1. The situation where wrinkles occur in the fabric 1 upon completion or the situation where the post portion 11 buckles is eliminated or reduced.

  Even after the dough 1 has passed through the post portion 11 of the eyelet main body 10, the upper die 31 continues to descend. As a result, the post portion 11 is hardly deformed as shown in FIG. Press down until limited. When the upper end of the stopper 44 contacts the shaft main body 42, the axial compression amount of the shaft elastic body 43 is maximized. Thus, even after the downward displacement of the shaft body 42 is stopped, the upper die 30 continues to descend, and accordingly, the radially inner portion of the flange portion 12 of the eyelet body 10 pushes the washer 20 downward. Next, the die sleeve 46 starts to be displaced downward while compressing the sleeve elastic body 48 in the axial direction. Simultaneously with the lowering of the die sleeve 46, as shown in FIG. 7, the post portion 11 of the eyelet main body 10 is curved radially outward from the shaft portion inclined surface 42b along the shaft portion curved surface 42c. Then, as soon as the concave inclined surface 47c of the descending die sleeve 46 becomes a position (see FIG. 7) that is smoothly continuous with the shaft curved surface 42c of the shaft main body 42, the post portion 11 of the eyelet main body 10 Is further curled from the radially outer side to the upper side toward the concave portion inclined surface 47c. Next, as shown in FIG. 8, the upper die 31 is lowered until the bottom surface 32 a abuts against the circular surface 42 a of the shaft main body 42 of the lower die 40 with the dough abutted therebetween, and the eyelet main body 10 and the washer therebetween. 20 is further deformed so as to be crushed in the axial direction, and the lowering of the upper die 31 is stopped, whereby the attachment of the eyelet main body 10 and the washer 20 to the fabric 1 is completed. FIG. 9 is a longitudinal cross-sectional explanatory view showing a deformed eyelet main body 10 and a washer 20 constituting an annular eyelet attached to the fabric 1, and FIG. 10 is a partially enlarged view of FIG. When this attachment is completed, the eyelet main body 10 is crushed into a substantially C-shaped longitudinal section, and wraps while deforming the cylindrical portion 21 and the mountain portion 22a of the washer 20. At this time, the tip 11a of the post portion 11 curled in a C shape of the eyelet main body 10 enters the first receiving portion 23a of the outer peripheral portion 22 of the washer 20, and the outer end 12a of the flange portion 12 of the eyelet main body 10 is the washer. The fabric 1 is inserted into the second receiving portion 23 b of the outer peripheral portion 22 of the 20. The cylindrical portion 21 of the washer 20 is tilted so that the upper end of the cylindrical portion 21 opens outward in the radial direction inside the curved eyelet main body 10. At this time, at least some of the grooves 24 provided in the cylindrical portion 21 are at least partially broken, while some of the grooves 24 and parts thereof remain without being broken. In this way, the partially remaining groove 24 generates a kind of restoring force in the cylindrical portion 21 that resists being tilted outward in the radial direction by the deformed eyelet main body 10 and tries to stand up again. Therefore, the fabric 1 can be firmly sandwiched between the inner peripheral surface of the cylindrical portion 21 (which faces substantially upward in FIG. 10) and the upper half portion of the eyelet main body 10. Therefore, eyelets can be reliably fixed even with thin fabrics.

  11 and 12 are a plan view and a longitudinal sectional view illustrating a modified example of the washer. The washer 50 includes a cylindrical portion 51 whose diameter gradually increases upward, and an outer peripheral portion 52 similar to the outer peripheral portion 22 of the washer 20 described above. The cylindrical portion 51 includes the cylindrical portion 22 of the washer 20. Such a groove is not provided. In the eyelet attaching step described above, the eyelet main body 10 can be attached to the fabric 1 in the same manner by using the washer 50 instead of the washer 20. FIG. 13 shows a modification of the lower die. In this lower die, the entire sleeve portion 60 is formed of the same elastic body as the sleeve elastic body 48 described above, and the same recess 61 as the recess 47 of the die sleeve 46 described above is provided in the sleeve portion 60. In addition, since it is the same as the lower die | dye 40 except the sleeve part 60, the same reference number is attached | subjected. In the eyelet attaching step described above, the eyelet main body 10 and the washer 20 or 50 can be attached to the fabric 1 in the same manner by replacing the lower die 40 with the lower die having the sleeve portion 60. FIG. 14 shows yet another variation of the lower die. In this lower die, the stopper 44a is provided integrally with the shaft main body 70 so as to protrude downward from the bottom surface of the shaft main body 70 in a cylindrical shape. The other points are the same as those of the lower die 40 described above, and therefore the same reference numerals are given. The stopper 44a enters the inside of the shaft elastic body 43 in the radial direction. When the shaft main body 70 is pushed downward when the eyelet is attached, the bottom surface of the stopper 44a abuts against the upper surface of the base portion 49. Is stopped from moving downward.

DESCRIPTION OF SYMBOLS 1 Material 10 Eyelet main body 11 Post part 12 Flange part 20, 50 Washer 21, 51 Cylindrical part 21a Hole part 22, 52 Outer part 24 Groove 30 Eyelet attachment apparatus 31 Upper die 40 Lower die 41 Shaft part 42, 70 Shaft part main body 42b Shaft portion inclined surface 42c Shaft portion curved surface 43 Shaft portion elastic body 44, 44a Stopper 45, 60 Sleeve portion 46 Die sleeve 47 Recessed portion 48 Sleeve elastic body

Claims (5)

The cylindrical post portion (11) of the eyelet main body (10) is passed from one side of the fabric (1) to the other side, and then added together with the washers (20, 50) on the other side of the fabric (1). An eyelet attachment device (30) for attaching the eyelet main body (10) and the washers (20, 50) to the fabric (1) as an eyelet by tightening,
A first die (31) for holding the eyelet main body (10);
A second die (40) disposed concentrically with the first die (31) for holding washers (20, 50);
The first die (31) or the second die (40) is movable concentrically toward the second die (40) or the first die (31),
The second die (40) includes a columnar shaft portion (41) and a cylindrical sleeve portion (45, 60) surrounding the shaft portion (41).
The shaft portion (41) receives an end (11a) of the post portion (11) of the eyelet main body (10) and has an annular inclined surface (42b) for curving the post portion (11) radially outward. Have
The sleeve portion (45, 60) has an annular recess (47, 61) in which a radially outer portion of the washer (20, 50) is received.
The shaft portion (41) and the sleeve portion (45, 60) are relatively pressed from the first die (31) side when the eyelet main body (10) and the washers (20, 50) are attached to the fabric (1). The first die (31) can be elastically displaced independently in the direction of relatively pushing the second die (40),
The second die (40) is an eyelet attachment device including stoppers (44, 44a) that limit the amount of elastic displacement of the shaft portion (41).   The shaft portion (41) includes a metallic shaft portion main body (42, 70) having the inclined surface (42b) and a shaft portion elastic body (43) that supports the shaft portion main body (42, 70). The eyelet attachment device according to claim 1, wherein the sleeve portion (45) includes a metallic die sleeve (46) having the concave portion (47) and a sleeve elastic body (48) supporting the die sleeve (46).   The stopper (44) is disposed concentrically with the shaft portion (41), the shaft portion (41) includes a cavity (42d) into which the stopper (44) is inserted, and the shaft portion (41) is provided with a stopper ( 44) The eyelet attachment device of claim 1 or 2 guided by a cavity (42d). The cylindrical post portion (11) of the eyelet main body (10) is penetrated from the one surface side to the other surface side of the fabric (1), and then the holes of the washers (20, 50) on the other surface side of the fabric (1) The eyelet attaching device (30) for attaching the eyelet main body (10) and the washers (20, 50) to the fabric (1) as eyelets by inserting the parts (21a) and then crimping together with the washers (20, 50). Because
A first die (31) for holding the eyelet main body (10);
A second die (40) disposed concentrically with the first die (31) for holding washers (20, 50);
The first die (31) or the second die (40) is movable concentrically toward the second die (40) or the first die (31),
The second die (40) includes a columnar shaft portion (41) and a cylindrical sleeve portion (45, 60) surrounding the shaft portion (41).
The shaft portion (41) receives an end (11a) of the post portion (11) of the eyelet main body (10) and has an annular inclined surface (42b) for curving the post portion (11) radially outward. Have
The sleeve portion (45, 60) has an annular recess (47, 61) in which a radially outer portion is accommodated from the hole portion (21a) of the washer (20, 50).
When the sleeve part (45, 60) is relatively pushed from the first die (31) side when the eyelet main body (10) and the washer (20, 50) are attached to the cloth (1), The die (31) is elastically displaceable in the direction of pushing the second die (40) relatively;
The shaft portion (41), the peripheral edge can abut der hole portion (21a) of the washer (20, 50) is, the shaft portion (41), eyelets body (10) and washers (20, 50 ) To the fabric (1), the sleeve portion is pushed in the direction in which the first die (31) relatively pushes the second die (40) by being relatively pushed from the first die (31) side. resiliently displaceable der Ru eyelet mounted device independently of the. After passing the cylindrical post portion (11) of the eyelet main body (10) held by the first die (31) from one side to the other side of the fabric (1), the other surface of the fabric (1) Eyelet attachment for attaching the eyelet body (10) and the washers (20, 50) to the fabric (1) as eyelets by crimping together with the washers (20, 50) held by the second die (40) on the side A method,
The second die (40) includes a columnar shaft portion (41) and a cylindrical sleeve portion (45, 60) surrounding the shaft portion (41).
The shaft portion (41) receives an end (11a) of the post portion (11) of the eyelet main body (10) and has an annular inclined surface (42b) for curving the post portion (11) radially outward. Have
When the second die (40) is pushed relatively from the first die (31),
A shaft portion displacement step in which the shaft portion (41) is elastically displaced in a direction in which the first die (31) relatively pushes the second die (40);
A sleeve displacement step in which the sleeve portion (45, 60) is elastically displaced in the direction after the shaft portion displacement step;
In the shaft part displacement step, the tip (11a) of the post part (11) of the eyelet main body (10) presses the cloth (1) relatively against the inclined surface (42b) of the shaft part (41) while the cloth (1 How to attach the eyelet.

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