JPWO2017191688A1 - Fastener element, fastener element manufacturing apparatus, and fastener element manufacturing method - Google Patents

Abstract

The fastener element (10) of the present invention has a meshing head (11) and a tape clamping part (16) including a crotch part (17), a first leg part (18a) and a second leg part (18b). . The tape clamping part (16) bulges adjacent to the element thickness direction of at least one notch part (21) opening in the tape clamping surface (19) and the bottom face (21a) of the notch part (21). And a bulging portion (22). Such a fastener element (10) can be easily manufactured from a Y-shaped wire (50). Further, by planting the fastener element (10) on the fastener tape (3), the sliding strength and pull-out strength of the fastener element (10) can be increased.

Description

  The present invention relates to a metal fastener element having a meshing head having a meshing recess formed on a first surface and a meshing projection formed on a second surface, and a manufacturing apparatus and a manufacturing method for manufacturing the fastener element. .

  A metal fastener element (hereinafter sometimes simply referred to as a metal element) generally has a meshing head and a tape clamping portion extending from the base end of the meshing head. The tape clamping portion has a crotch portion that extends continuously from the meshing head portion and a pair of first and second leg portions that branch from the crotch portion and further extend. In this case, a tape clamping space is formed between the first leg portion and the second leg portion, and a tape clamping surface extends from the first leg portion of the tape clamping portion to the second leg portion via the crotch portion. It is formed continuously. Such a metal element is usually manufactured mainly using the following two typical methods.

  First, a first manufacturing method for manufacturing a metal element is to form a meshing head or the like by plastically deforming a metal flat wire by pressing such as pressing, and further, the formed flat wire is formed into a punch or die. This is a method of manufacturing a metal element by punching or cutting it into the shape of the element using, for example. In the case of this first manufacturing method, the fastener elements are manufactured one by one.

  The fastener element thus obtained is subjected to a polishing process such as barrel polishing or chemical polishing, or a coating process for applying clear coating or the like to the element surface. It is planted one by one at regular intervals on the side edges. Thus, a fastener stringer in which a plurality of metal elements are arranged on the fastener tape is manufactured.

  Next, a second manufacturing method for manufacturing a metal element is, for example, by passing a long metal wire having a circular cross section through a plurality of rolling rolls and forming the cross section to have a substantially Y shape. Then, an element wire having a substantially Y-shaped cross section (so-called Y bar) is produced. Subsequently, the obtained wire is sequentially cut at a desired thickness in the length direction of the wire using a cutting punch and a cutting die, thereby holding the temporary meshing head and the tape sandwiched from the temporary meshing head. An element element having a portion is formed.

  Thereafter, the temporary meshing head of the obtained element element is press-molded in the element thickness direction from the first surface side using a forming die and a forming punch to be plastically deformed. As a result, a metal element having a meshing head in which a meshing recess is formed on the first surface and a meshing projection is formed on the second surface and the above-described tape clamping portion extending from the meshing head is manufactured. The

  As for the above-described second production method and production apparatus used therefor, for example, Japanese Patent Publication No. 63-6295 (Patent Document 1), Japanese Patent No. 2744383 (Patent Document 2), International Publication No. 2015/049767 ( Patent Document 3) and the like.

  The metal element manufactured by the second manufacturing method as described above is sometimes referred to as a single-sided element because the engagement recess and the engagement protrusion are formed one by one on the opposite surface of the engagement head. In addition, the single-sided element manufactured by the second method has a fastener tape in which a planting process by a caulking portion (caulking punch) is continuously performed following the formation of the meshing convex portion and the meshing concave portion described above. Are attached one by one to one side edge, thereby producing a fastener stringer. Further, if necessary, a polishing process such as barrel polishing may be performed on the manufactured single-sided element before performing the planting process on the fastener tape.

  The second manufacturing method for manufacturing a metal element from a wire having a substantially Y-shaped cross section as described above is more effective than the first manufacturing method for manufacturing a metal element from a flat metal wire. Although the shape is limited, it has the advantage that fastener stringers and slide fasteners can be manufactured at low cost.

  By the way, generally about the metal element which has a meshing head and a tape clamping part, the drawing strength showing the intensity | strength which a metal element does not drop from a fastener tape when receiving the force of the tape width direction of a fastener tape has high. In addition, it is required that the sliding strength representing the strength that the mounting position does not shift when the metal element receives a force in the tape length direction is high.

  For example, inventions relating to increasing the sliding strength of metal elements are disclosed in Japanese Utility Model Publication No. 52-64106 (Patent Document 4), Japanese Utility Model Publication No. 56-35052 (Patent Document 5), Japanese Utility Model Publication No. 57-48405 (Patent Document 4). Reference 6).

  As an example, as shown in a perspective view of the metal element 90 described in Patent Document 6 in FIG. 13, the metal element 90 of Patent Document 6 holds the fastener tape from the tape holding surface 92 of the tape holding portion 91. A plurality of projecting portions 93 projecting in a direction orthogonal to the element thickness direction are provided so as to project locally toward the clamping space.

  Usually, the metal element 90 is plastically deformed by pressing the first leg portion 94a and the second leg portion 94b of the tape holding portion 91 so as to approach each other with the fastener tape inserted into the tape holding portion 91. Is attached (planted) to the fastener tape.

  Accordingly, the plurality of protrusions 93 as described above are provided in the tape clamping part 91 of the metal element 90, so that when the metal element 90 is attached to the fastener tape, the protrusion 93 is locally bitten into the fastener tape. be able to. As a result, the above-described sliding strength of the metal element 90 with respect to the fastener tape is effectively enhanced.

Japanese Patent Publication No. 63-6295 Japanese Patent No. 2744383 International Publication No. 2015/049767 Japanese Utility Model Publication No. 52-64106 Japanese Utility Model Publication No. 56-35052 Japanese Utility Model Publication No. 57-48405

  As described above, as a method of manufacturing a metal element, there are a first manufacturing method manufactured from a metal flat wire and a second manufacturing method manufactured from a wire (Y bar) having a substantially Y-shaped cross section. Generally known. Moreover, when using the 2nd manufacturing method, a metal element is manufactured by performing press molding to the element thickness direction as mentioned above with respect to the element element cut out from Y bar | burr.

  However, when the conventional metal element 90 as shown in FIG. 13 is manufactured, for example, a plurality of protrusions 93 are protruded from the tape clamping portion 91 of the metal element 90 in a direction perpendicular to the element thickness direction. It is necessary to install. For this reason, the metal element 90 having the plurality of protrusions 93 is manufactured using the second conventional manufacturing method in which only pressing along the element thickness direction can be performed on the temporary meshing head. Was very difficult.

  Further, as shown in FIG. 13, when the metal element 90 is manufactured using, for example, the conventional first manufacturing method, the tape clamping portion of the metal element to be manufactured is from a direction orthogonal to the element thickness direction. Since press working can also be performed, the protruding portion 93 as described above can be formed so as to protrude from the tape holding surface 92. However, in this case, it is difficult to ensure a large bulging height (protrusion amount) of the protruding portion 93 from the tape holding surface 92 of the tape holding portion 91.

  For this reason, for example, when a polishing process is performed on a metal element manufactured from a metal flat wire, the protrusion provided on the tape clamping portion of the metal element is scraped off in the polishing process and becomes very small. Sometimes it disappeared. Therefore, even when the polishing process is performed after the fastener element is manufactured, there is a demand for development of a technique in which the protruding portion is formed with an appropriate size in the tape clamping portion of the fastener element and the sliding strength can be stably increased.

  The present invention has been made in view of the above-described conventional problems, and a specific object thereof is to provide a tape holding portion with a protruding portion that stably has a bulging height capable of increasing sliding strength, and An object of the present invention is to provide a metal fastener element that can be manufactured at low cost using a method of cutting out an element element from a wire having a substantially Y-shaped cross section, and a manufacturing apparatus and a manufacturing method for manufacturing the fastener element. .

  In order to achieve the above object, a fastener element provided by the present invention has, as a basic configuration, a meshing head and a tape clamping portion extending from the meshing head, A meshing recess is provided on the first surface, a meshing projection is provided on the second surface of the meshing head, and the tape clamping portion is branched from the crotch and a crotch extending from the meshing head. A metal for a slide fastener, further comprising a pair of first and second leg portions extending further, and having a tape clamping surface continuously formed from the first leg portion to the second leg portion via the crotch portion. In the fastener element made of tape, the tape clamping portion is recessed along the element thickness direction from at least one of the first surface and the second surface of the tape clamping portion, and opens to the tape clamping surface. Notch and the notch Adjacent to the element thickness direction of the bottom parts is intended to be most important characterized by having a bulging portion that bulges from the tape clamping face.

The fastener element which concerns on this invention WHEREIN: It is preferable that the said bottom face of the said notch part and the top end surface of the said bulging part are formed in the continuous single surface.
Moreover, it is preferable that the said notch part is formed in the taper shape where the space cross section orthogonal to an element thickness direction reduces gradually toward the said bottom face of the said notch part.
Furthermore, it is preferable that the plurality of notches and the plurality of bulges are formed symmetrically with respect to the center plane in the element width direction.

The fastener element of this invention WHEREIN: It is preferable that the said tape clamping part has a protrusion part protrudingly provided along the element thickness direction on the said tape clamping surface.
Moreover, it is preferable that the said notch part is recessedly provided from the said 1st surface of the said tape clamping part.

  Next, the fastener element manufacturing apparatus provided by the present invention has, as a basic structure, a wire supply for intermittently supplying an element wire having a substantially Y-shaped cross section at a predetermined pitch in the length direction. A cutting punch that cuts the wire for the element at a predetermined thickness to form an element element having a temporary meshing head and a tape clamping part extending from the temporary meshing head; and An element forming part that press-forms the temporary meshing head to form a meshing recess on the first surface of the temporary meshing head and mold a meshing convexity on the second surface of the temporary meshing head; In the fastener element manufacturing apparatus, the element forming portion is plastically deformed by locally pressing the tape clamping portion of the element element along the element thickness direction from the first surface. Thus, a protrusion that forms a notch portion recessed in the tape holding portion and a bulge portion that bulges adjacent to the bottom surface of the notch portion by plastic flow accompanying the formation of the notch portion. The most important feature is that it has a shaped pressing portion.

  In the manufacturing apparatus of the present invention, the element molding portion is disposed so as to be movable up and down with respect to the forming die on which the element element is placed, and the tape clamping portion of the element element faces the forming die. A pressure pad to be pressed and a forming punch which is arranged so as to be movable up and down with respect to the forming die and performs the press molding on the temporary meshing head of the element element held between the forming die and the pressure pad. The pressure pad includes an element fixing portion that presses the tape clamping portion of the element element with a distal end surface, and is suspended from the distal end surface of the element fixing portion. An insertion portion inserted between the two leg portions, wherein the protruding pressing portion is the pressure The proximal end portion of the insertion portion of the pad, it is preferable that projecting from the outer circumferential surface of the insertion portion.

  In this case, it is preferable that the projecting pressing portion of the pressure pad has a form in which an area of a cross section perpendicular to the extending direction of the insertion portion decreases with increasing distance from the distal end surface of the element fixing portion.

  Next, the fastener element manufacturing method provided by the present invention cuts the element wire having a substantially Y-shaped cross section at a predetermined thickness, and extends from the temporary meshing head and the temporary meshing head. Forming an element element having a tape clamping portion to be ejected, and press-molding the temporary meshing head of the element element to form a meshing recess on the first surface of the temporary meshing head, and In the method of manufacturing a fastener element including forming a meshing convex portion on the second surface of the meshing head, when pressing the tape clamping portion of the element element in press molding of the temporary meshing head, The tape clamping portion is locally pressed from the first surface along the element thickness direction to be plastically deformed, thereby forming a notch portion recessed in the tape clamping portion. At the same time, it is an most important feature that it comprises forming a bulging portion which bulges adjacent the bottom of the notch by the plastic flow due to the formation of the notch.

  In the fastener element of the present invention, the tape clamping portion extending from the meshing head has a tape clamping surface formed continuously from the first leg portion of the tape clamping portion to the second leg portion via the crotch portion. The tape clamping portion corresponds to at least one notch portion recessed along the element thickness direction from at least one of the first surface and the second surface of the tape clamping portion, and the notch portion. And a bulging portion that bulges from the tape clamping surface adjacent to the element thickness direction on the bottom surface of the notch.

  When manufacturing such a fastener element of the present invention, a notch portion along the thickness direction of the element can be provided in the tape clamping portion, and at the same time, a bulging portion can be provided corresponding to the notch portion. For this reason, the fastener element of the present invention can be easily obtained by performing press working along the element thickness direction on the element element cut out from the wire material having a substantially Y-shaped cross section in the second manufacturing method described above. It can be manufactured. Therefore, the fastener element in which the bulging portion swells from the tape clamping surface of the tape clamping portion can be provided at low cost.

  In the fastener element of the present invention, the size of the bulging portion (particularly the bulging height) can be easily increased in accordance with the size of the notch portion. As a result, when the fastener element is attached to the fastener tape, the bulging portion that is largely formed in the fastener element is deeply bitten into the fastener tape (particularly the core string portion of the fastener tape), and the fastener tape is formed in the formed notch portion. It is possible to bite (enter). As a result, the sliding strength of the fastener element with respect to the fastener tape can be easily increased, and the pull-out strength of the fastener element can be increased.

  Furthermore, since the bulging portion can be formed on the fastener element with the bulging height being increased as described above, the manufactured fastener element is subjected to a polishing process such as barrel polishing before being attached to the fastener tape. In such a case, the bulging portion can stably have an appropriate size (bulging height) that can increase the sliding strength even if it is slightly shaved in the polishing process.

  In such a fastener element of the present invention, the bottom surface of the notch portion and the top end surface of the bulging portion are formed on a single surface. Thereby, the bulging part is stably formed in the tape clamping surface of the tape clamping part. In addition, the bulging portion can be easily formed large corresponding to the size of the notch portion.

  Further, the notch provided in the tape clamping part is formed in a taper shape in which a spatial cross section perpendicular to the element thickness direction gradually decreases toward the bottom surface of the notch. Thereby, at the time of manufacture of a fastener element, a notch part can be formed in a predetermined shape and size, and a bulge part corresponding to the notch part can be formed stably. In addition, in the element forming portion that presses the element element of the fastener element manufacturing apparatus, it becomes easy to secure the strength of the protruding pressing portion that forms the notch portion, and it is effective that the protruding pressing portion is damaged. Can be prevented.

  Furthermore, in the present invention, the plurality of notches and the plurality of bulges are formed symmetrically with respect to the center plane in the element width direction. Thereby, since the bulging part of a fastener element can be bitten symmetrically in the front and back of a fastener tape and a fastener element can be attached, the sliding strength of a fastener element can be increased effectively. Moreover, even if the fastener element attached to the fastener tape receives an external force, the posture of the fastener element can be stably maintained.

  In the present invention, the tape clamping portion of the fastener element further includes a ridge portion that continuously projects on the tape clamping surface along the element thickness direction. Accordingly, the sliding strength of the fastener element can be further increased, and the pullout strength of the fastener element with respect to the fastener tape can be increased.

  The notch portion of the fastener element is recessed from the first surface of the tape clamping portion. Accordingly, when the fastener element is manufactured from the element element by the fastener element manufacturing apparatus, the notch and the bulge are smoothly formed by pressing from above the first surface of the element element in which the engagement recess is provided. And can be formed stably. Further, in this case, since it can be handled relatively easily by changing the shape of the pressure pad of the element forming portion disposed in the conventional manufacturing apparatus, the equipment cost required for improvement can be kept low.

  Next, the fastener element manufacturing apparatus provided by the present invention forms an element element by cutting an element wire with a predetermined thickness, and a wire supply part that supplies the element wire along the length direction. It has a cutting punch and an element forming part that presses the element element to form a meshing concave part and a meshing convex part. The element forming portion has a protruding pressing portion that locally presses the tape clamping portion of the element element along the element thickness direction to plastically deform it.

  In this case, the protruding pressing part is formed so as to be capable of being pressed to a predetermined depth along the element thickness direction with respect to the tape clamping part. Further, the projecting pressing part is recessed in the tape clamping part along the element thickness direction, and at the same time forms a notch that opens to the tape clamping surface of the tape clamping part, and at the same time the plasticity associated with the formation of the notch It has the form which can form the bulging part protrudingly provided adjacent to the bottom face of a notch part by flow.

  According to the manufacturing apparatus of the present invention having the projecting pressing portion as described above in the element molding portion, from the element wire having a substantially Y-shaped cross section, the tape clamping portion has a notch portion and the notch portion. The fastener element of the present invention provided with the corresponding bulging portion can be manufactured continuously and stably.

  In the manufacturing apparatus of the present invention as described above, the element forming portion is disposed so as to be movable up and down relative to the forming die on which the element element is placed, and the tape clamping portion of the element element faces the forming die. A pressure pad, and a forming punch which is arranged so as to be movable up and down with respect to the forming die and press-forms the element element.

  In addition, the pressure pad is provided between the element fixing portion that presses the tape clamping portion of the element element with the tip end surface and the tip end surface of the element fixing portion, and is inserted between the first leg portion and the second leg portion of the tape clamping portion. An insertion portion. In this case, the projecting pressing portion that forms the notch in the tape clamping portion of the element element is orthogonal to the base end portion of the insertion portion of the pressure pad from the outer peripheral side surface of the insertion portion to the hanging direction of the insertion portion. Projected in the direction.

  Since the element forming portion includes the forming die, the pressure pad, and the forming punch as described above, the element forming portion capable of performing press forming on the element element can be formed with a relatively simple structure. Also, by pressing the element element at the element molding portion, a fastener element in which the engagement concave portion and the engagement convex portion are provided in the engagement head portion, and the notch portion and the bulging portion are provided in the tape clamping portion is provided. It can be manufactured stably.

  Further, in this case, the protruding pressing portion of the pressure pad has a form in which the area of the cross section orthogonal to the extending direction of the insertion portion decreases as the distance from the distal end surface of the element fixing portion increases. Thereby, it becomes easy to ensure the strength of the projecting pressing portion of the pressure pad, and the projecting pressing portion can be formed to be difficult to break. Further, the notched portion can be formed in a predetermined shape and size in the tape clamping portion of the element element by the protruding pressing portion, and the bulging portion corresponding to the notched portion can be stably formed.

  Next, the fastener element manufacturing method provided by the present invention includes forming an element element by cutting an element wire with a predetermined thickness, and press-molding the element element to form a meshing recess and meshing. Including forming a convex portion. Further, in the manufacturing method of the present invention, when pressing the tape clamping portion of the element element in press molding of the temporary meshing head, the tape clamping portion of the element element is locally pressed along the element thickness direction to perform plastic deformation. Performing press working.

  By performing the press work as described above, it is possible to stably form a notch portion that is recessed in the tape clamping portion along the element thickness direction and opens to the tape clamping surface of the tape clamping portion. Further, simultaneously with the formation of the notch, it is possible to stably form a bulge that bulges adjacent to the bottom surface of the notch due to plastic flow accompanying the formation of the notch.

  Therefore, according to the manufacturing method of the present invention including the steps as described above, from the element wire having a substantially Y-shaped cross section, the tape holding part is arranged corresponding to the notch part and the notch part. The fastener element of the present invention provided with the bulging portion can be manufactured continuously, efficiently and stably.

It is a top view which shows the slide fastener which has a fastener element of this invention. It is a perspective view which shows the fastener element before attaching to a fastener tape. It is the bottom view which looked at the same fastener element from the 2nd surface (lower surface) side. It is the side view which looked at the same fastener element from the side. It is sectional drawing of the VV line shown in FIG. It is a principal part expansion perspective view which expands and shows the notch part and swelling part which were provided in the fastener element. It is a principal part expansion perspective view which expands and shows the principal part of the manufacturing apparatus of a fastener element. It is an expansion perspective view which expands and shows the lower end part of the pressure pad distribute | arranged to a manufacturing apparatus. It is a schematic diagram which shows the state which the wire rod for elements protruded on the sliding contact surface of the cutting die in a manufacturing apparatus. It is a schematic diagram which shows the state by which the element element was cut out from the wire for elements in a manufacturing apparatus. It is a schematic diagram which shows the state which press-processes an element element and shape | molds in a fastener element in a manufacturing apparatus. It is a perspective view which shows an element element. It is a perspective view which shows the conventional fastener element.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications can be made as long as it has substantially the same configuration as the present invention and has the same effects. Is possible.

  FIG. 1 is a plan view showing a slide fastener of the present embodiment. 2, 3 and 4 are a perspective view, a bottom view and a side view of the fastener element, respectively. FIG. 5 is a cross-sectional view taken along line VV shown in FIG. 3, and FIG. 6 is an enlarged perspective view showing a main part of the fastener element.

  In the following description of the fastener element, the vertical direction or thickness direction of the fastener element is the direction in which the fastener element is attached to the fastener tape in the tape length direction. The first surface on which the concave portion is formed is the lower surface, and the second surface on which the meshing convex portion is formed is the upper surface.

  Further, the front-rear direction or the longitudinal direction of the fastener element is the direction that becomes the tape width direction of the fastener tape when the fastener element is attached to the fastener tape. The extending direction of the first leg and the second leg is defined as the rear. Furthermore, the left-right direction or the width direction of the fastener element is a direction that becomes the tape front and back direction when the fastener element is attached to the fastener tape.

  The slide fastener 1 according to this embodiment includes a pair of first fastener stringers 2a in which a plurality of metal fastener elements 10 are arranged in rows on opposite tape side edges of a pair of fastener tapes 3 to form an element row 7. A second fastener stringer 2b, a first fastener 4 (also referred to as an upper stopper) disposed adjacent to the element row 7 at one end of the first and second fastener stringers 2a, 2b, and first and second A second stopper 5 (also referred to as a lower stopper) disposed adjacent to the element row 7 so as to straddle the other ends of the fastener stringers 2a, 2b, and slidably disposed along the element row 7, And a slider 6 for engaging and separating the element rows 7 of the first and second fastener stringers 2a and 2b.

  In this case, a core string portion 3 a that bulges in the tape front and back direction is provided at the tape side edge portion of the fastener tape 3. Hereinafter, the element row 7 formed on the first fastener stringer 2a is referred to as a first element row 7a, and the element row 7 formed on the second fastener stringer 2b is referred to as a second element row 7b.

  The slide fastener 1 of the present embodiment is characterized by the form of a metal fastener element 10 that forms the element row 7, and members other than the metal element 10 are the same as those of a conventional general slide fastener. Is formed. Therefore, in the following description, the form of the metal element 10 will be mainly described, and detailed description of members other than the metal element 10 will be omitted.

  The metal element 10 of the present embodiment is made of a metal such as a copper alloy, a nickel alloy, or an aluminum alloy, and the plurality of metal elements 10 are constant along the tape length direction at the tape side edge of the fastener tape 3. Are attached at intervals.

  Each metal element 10 has a meshing head 11 having a meshing recess 12 and a meshing projection 13, and a tape clamping part 16 extending rearward from the meshing head 11. Further, the tape clamping portion 16 includes a crotch portion 17 that is integrally formed continuously from the meshing head portion 11, a pair of left and right first leg portions 18 a that branch from the crotch portion 17 into two and extend backward. And two leg portions 18b.

  In this case, the tape clamping portion 16 of the metal element 10 has a clamping space 20 formed by being surrounded by the crotch portion 17, the first leg portion 18a, and the second leg portion 18b. Further, the tape clamping portion 16 is formed with a tape clamping surface 19 that is continuous from the first leg portion 18 a to the second leg portion 18 b via the crotch portion 17 and that faces the clamping space 20. The metal element 10 of this embodiment is formed symmetrically with a plane passing through the center in the element width direction as a symmetry plane.

  The fastener element 10 schematically shown in FIGS. 2 to 5 is in a state before being attached to the fastener tape 3, that is, the first leg portion 18 a and the second leg portion 18 b of the tape holding portion 16. It has a substantially Y-shaped form that is open in the element width direction. In the fastener element 10, the tape side edge of the fastener tape 3 is inserted between the first leg 18a and the second leg 18b, and the tape side edge abuts against the tape clamping surface 19 of the crotch portion 17 to sandwich it. While being held in the space 20, the first leg 18 a and the second leg 18 b are pressed in a direction approaching each other to be plastically deformed to be attached to the fastener tape 3.

  In this embodiment, a meshing recess 12 is formed on the lower surface (first surface) of the meshing head 11, and a meshing projection 13 is provided on the upper surface (second surface) of the meshing head 11. In this case, the meshing protrusion 13 is formed to bulge upward in a dome shape at a position corresponding to the meshing recess 12 on the upper surface of the meshing head 11. The meshing recess 12 has a shape of a bottomed hole provided with an accommodation space in which the meshing projection 13 of the metal element 10 which is a meshing partner can be accommodated. In this case, the bottom surface of the meshing recess 12 is formed as a flat surface parallel to the bottom surface of the meshing head 11.

  Further, the meshing head 11 of the present embodiment has a lower end (front end) on the lower surface side of the meshing head 11 in order to keep the sliding resistance when sliding the slider 6 with the slide fastener 1 shown in FIG. ) And the chamfered portion 15 provided on the upper surface side of the meshing head 11.

  The tip inclined portion 14 has an inclined surface that is inclined obliquely from the lower surface of the meshing head 11 toward the tip surface. The tip inclined portion 14 is formed so that the width dimension of the inclined surface gradually increases toward the tip of the meshing head 11 when the fastener element 10 is viewed from the bottom (FIG. 3). The chamfered portion 15 is provided on the outer peripheral edge portion on the upper surface side of the meshing head 11 so as to scrape off the corners between the upper surface of the meshing head 11 and the tip and side surfaces of the meshing head 11. .

  Since the tip inclined portion 14 and the chamfered portion 15 as described above are provided on the meshing head portion 11 of the metal element 10, the slider 6 of the slide fastener 1 is slid to slide the first element row 7 a and the second element. When the row 7b is engaged or separated, the fastener element 10 of the first element row 7a and the fastener element 10 of the second element row 7b collide with each other or get caught in the element guide path of the slider 6. Can be difficult. As a result, the sliding resistance of the slider 6 can be prevented from increasing, and the sliding operation of the slider 6 can be performed lightly.

  The tape clamping portion 16 of the metal element 10 includes four cutout portions 21 cut out from the lower surface (first surface) of the tape clamping portion 16 and four cutout portions 21 corresponding to the four cutout portions 21 respectively. It has the bulging part 22 and the two protrusion parts 23 projected continuously from the tape clamping surface 19 along the element thickness direction.

  As shown in an enlarged view in FIG. 6, the cutout portion 21 is formed by cutting out from the lower surface of the tape holding portion 16 along the element thickness direction. Further, the notch portion 21 is open to the lower surface of the tape clamping portion 16 and the tape clamping surface 19. In this case, the notch portion 21 includes a flat bottom surface 21a arranged in parallel with the lower surface of the tape holding portion 16, a pair of side wall surfaces 21b that rise from the bottom surface 21a and are formed flat so as to face each other, and a bottom surface It has a rear end face (inner end face) 21c that rises from 21a and is formed in a flat shape farthest from the tape clamping face 19.

  The internal space of the notch 21 is formed such that a cross section perpendicular to the element thickness direction has a rectangular shape. In this case, the notch portion 21 has the element thickness such that the distance between the pair of side wall surfaces 21b gradually increases from the lower surface of the tape holding portion 16 toward the bottom surface 21a of the notch portion 21. Inclined with respect to the direction.

  The rear end surface 21c of the notch portion 21 is formed along the element thickness direction, and the rear end surface 21c of the notch portion 21 and the tape clamping surface 19 of the tape clamping portion 16 are arranged substantially in parallel. . In the present invention, the rear end surface 21 c of the notch 21 has an element such that a cross section perpendicular to the element thickness direction in the inner space of the notch 21 decreases toward the bottom 21 a of the notch 21. It may be formed inclined with respect to the thickness direction.

  The bulging portion 22 of the tape holding portion 16 is formed at a position adjacent to the bottom surface 21 a of the notch portion 21 in the element thickness direction so as to protrude from the tape holding surface 19 toward the tape holding space 20. Further, the bulging portion 22 is formed while forming the notch portion 21 with the projecting pressing portion 43c of the pressure pad 43 when the element element 30 (see FIG. 12) is pressed by the pressure pad 43 as will be described later. The That is, the bulging part 22 is formed by plastic flow accompanying the formation of the notch part 21. Therefore, in the fastener element 10, one bulge portion 22 is formed corresponding to one notch portion 21.

  The bulging portion 22 has a flat top end surface 22 a formed at a position closest to the lower surface of the tape clamping portion 16. The top end surface 22 a of the bulging portion 22 is formed continuously from the bottom surface 21 a of the notch portion 21 and is disposed in parallel with the lower surface of the tape holding portion 16. Further, the top end surface 22 a of the bulging portion 22 forms a single flat surface with the bottom surface 21 a of the notch portion 21. The bottom surface 21 a of the notch 21 and the top end surface 22 a of the bulging portion 22 are formed so as to be inclined downward from the back end surface 21 c toward the tip of the bulging portion 22 with respect to the lower surface of the tape holding portion 16. May be. Further, the bulging portion 22 has such a form that the area of the cross section perpendicular to the element thickness direction becomes smaller as the area is away from the top end surface 22 a of the bulging portion 22.

  The bulging height (projection amount) of the bulging portion 22 from the tape clamping surface 19 is the largest at the top end surface 22a of the bulging portion 22 and the portion in the vicinity thereof (top end portion). In this case, the bulging height from the tape holding surface 19 at the top end portion of the bulging portion 22 is set to be larger than the bulging height of the protrusion 23. The lateral dimension of the bulging portion 22 along the tape clamping surface 19 is also set larger than the lateral dimension of the protruding portion 23 along the tape clamping surface 19.

  In the metal element 10 of the present embodiment, the notch 21 and the bulging part 22 corresponding to the notch 21 are arranged along the element thickness direction. In addition, when the metal element 10 is viewed from below, the four cutout portions 21 and the bulging portion 22 are provided in the tape clamping portion 16 of the metal element 10 at positions spaced apart from each other at equal intervals.

  The protrusions 23 of the tape clamping unit 16 are formed along the element thickness direction in the entire element thickness direction from the position of the upper surface of the tape clamping unit 16 to the position of the lower surface of the tape clamping unit 16. The cross section orthogonal to the element thickness direction of the ridge portion 23 has the same shape throughout the element thickness direction. In the case of this embodiment, the cross section orthogonal to the element thickness direction of the ridge 23 has a substantially triangular shape. By providing the protruding portion 23 in the tape clamping portion 16, it is possible to effectively increase the pulling strength and sliding strength of the fastener element 10 with respect to the fastener tape 3.

The fastener element 10 of the present embodiment as described above is manufactured using a manufacturing apparatus 40 described below.
The manufacturing apparatus 40 used in the present embodiment forms an element element 30 (FIG. 12) by cutting a metal element wire (Y bar) 50 having a substantially Y-shaped cross section at a predetermined thickness. This is a manufacturing apparatus 40 that manufactures the fastener element 10 in which the meshing concave portion 12 and the meshing convex portion 13 are formed in the meshing head 11 by performing press molding on the formed element element 30 in the element molding portion 41. .

  In particular, the manufacturing apparatus 40 of the present embodiment is characterized by an element molding portion 41 that performs press molding on the element element 30. The element forming portion 41 is configured to form the cutout portion 21 and the bulging portion 22 in the tape clamping portion 16 of the element element 30 at the same time as the forming of the engaging concave portion 12 and the engaging convex portion 13. . Therefore, hereinafter, the structure of the manufacturing apparatus 40 will be described. However, since the parts other than the element forming portion 41 of the manufacturing apparatus 40 are substantially the same as those of the conventional apparatus, the manufacturing apparatus 40 centering on the element forming portion 41. Will be described.

  The manufacturing apparatus 40 of the present embodiment cuts the wire 50 at a predetermined thickness by a wire supply unit (not shown) that intermittently supplies the element wire 50 at a predetermined pitch, and a cutting die 46 and a cutting punch 47. It has the wire cutting part which forms the element 30, and the element shaping | molding part 41 which press-forms the cut | disconnected element element 30. FIG.

  Furthermore, in the manufacturing apparatus 40 of the present embodiment, the element attaching portion 48 (additional member) that is attached to the fastener tape 3 in order by plastically deforming the fastener element 10 produced by press molding at the element forming portion 41 by pressing. A fastening punch 48a) and a chamfering portion 49 (chamfering punch 49a) for chamfering the fastener element 10 attached to the fastener tape 3 are further provided.

  In this case, the wire rod supply unit, the cutting die 46, and the cutting punch 47 of the present embodiment are the wire rod supply unit (also referred to as a wire rod feed roller or a supply unit unit) described in Patent Document 2 or Patent Document 3 described above, It is formed in substantially the same manner as the cutting die and the cutting punch. In addition, the operation mechanism of each part in the manufacturing apparatus 40 of the present embodiment is also formed in substantially the same manner as the operation mechanism described in Patent Document 2 and Patent Document 3 described above.

  Here, the cutting die 46 and the cutting punch 47 will be briefly described. In the manufacturing apparatus 40 of this embodiment, the cutting die 46 and the forming die 42 described later of the element forming portion 41 are moved forward with respect to the cutting punch 47. It is provided so as to be able to reciprocate linearly in the front-rear direction by a drive mechanism (not shown) so as to perform reverse movement alternately.

  In this case, the upper surface of the cutting die 46 is formed as a sliding contact surface with which the cutting punch 47 is in sliding contact. At the center in the width direction of the cutting die 46, a wire guide hole 46a that opens to the sliding contact surface (upper surface) of the cutting die 46 and penetrates the cutting die 46 in the vertical direction is provided. The wire guide hole 46a of the cutting die 46 is formed in the vertical direction in a shape corresponding to the transverse cross section of the element wire 50, and the element wire 50 supplied from the wire supply portion is downward in the wire guide hole 46a. It is introduced from.

  On the upper surface of the cutting die 46, a cutting punch 47 is fixedly fixed to the frame of the manufacturing apparatus 40. For this reason, as the cutting die 46 and the forming die 42 are reciprocated in the front-rear direction by a drive mechanism (not shown) as described above, the fixed cutting punch 47 is moved relative to the cutting die 46 and the forming die 42. The forward movement and the backward movement can be performed alternately while sliding on the upper surface of 46.

  By having the cutting die 46 and the cutting punch 47 as described above, as will be described later, a cutting punch that relatively advances a part (protruding portion) of the element wire 50 protruded from the upper surface of the cutting die 46. 47, whereby the element element 30 shown in FIG. 12 is formed. Furthermore, the element element 30 can be smoothly fed to the forming die 42 of the element forming portion 41 located in front of the cutting die 46 by relatively advancing the formed element element 30 with the cutting punch 47. .

  The element molding portion 41 of the present embodiment includes a forming die 42 for placing the element element 30 sent by the cutting punch 47 and supporting it from below, a pressure pad 43 for pressing the element element 30 toward the forming die 42, A forming punch 44 that press-forms the element element 30 held between the forming die 42 and the pressure pad 43 is provided.

  The forming die 42 has a placement portion 42a on which the element element 30 is placed. The placement portion 42 a is disposed at a position below the upper surface of the forming die 42. Further, the forming die 42 has a predetermined shape capable of forming the meshing head 11 of the fastener element 10 by pressing a temporary meshing head 31 described later of the element element 30 in cooperation with the forming punch 44. .

  The forming punch 44 is fixed to a punch holding portion (not shown) above the forming die 42 on which the element element 30 is placed. Further, the forming punch 44 is provided so as to reciprocate in the vertical direction by a drive mechanism (not shown) so as to be alternately lowered and raised with respect to the forming die 42 together with the punch holding portion.

  The lower end portion of the forming punch 44 is provided with a flat contact surface that contacts the first surface of the element element 30 (fastener element 10) and a concave portion forming pressing portion 44a that is suspended from the contact surface. Yes. The recess formation pressing portion 44 a has a shape corresponding to the meshing recess 12 of the fastener element 10.

  The pressure pad 43 is disposed above the forming die 42 on which the element element 30 is placed, and is held by the punch holding portion so as to be movable up and down. Furthermore, the pressure pad 43 is urged downward by a spring member (not shown).

  At the lower end of the pressure pad 43, as shown in FIG. 8, there are an element fixing part 43a for pressing the tape clamping part 16 of the element element 30 placed on the forming die 42 with the tip surface, and an element fixing part 43a. An insertion portion 43b that is suspended from the distal end surface and is inserted between the first leg portion 18a and the second leg portion 18b of the tape holding portion 16, and four protruding presses that protrude from the proximal end portion of the insertion portion 43b. Part 43c.

  In this case, the protruding pressing portion 43c is provided so as to protrude from the outer peripheral side surface at the proximal end portion of the insertion portion 43b in a direction orthogonal to the extending direction of the insertion portion 43b. Further, the protruding pressing portion 43c has a side wall surface that is perpendicular to the extending direction of the insertion portion 43b, and the side wall surface of the protruding pressing portion 43c decreases as the distance from the tip surface of the element fixing portion 43a decreases. It has a form inclined obliquely with respect to the installation direction. In the present embodiment, the size and shape of the notch portion 21 and the bulging portion 22 provided on the fastener element 10 can be changed by changing the size and shape of the protruding pressing portion 43 c provided on the pressure pad 43. is there.

  When such a pressure pad 43 contacts the element element 30 placed on the forming die 42, first, the insertion portion 43b of the pressure pad 43 is between the first leg portion 18a and the second leg portion 18b of the element element 30. Inserted into. In this case, the position of the insertion portion 43b of the pressure pad 43 relative to the first leg portion 18a and the second leg portion 18b of the element element 30 is represented by an imaginary line in FIG. A small gap is provided between the 30 first leg portion 18a and the second leg portion 18b.

  In addition, after the insertion portion 43b of the pressure pad 43 is inserted as described above, the pressure pad 43 is further lowered so that the element fixing portion 43a of the pressure pad 43 is placed on the forming die 42. Can be pressed from above, and each protruding pressing portion 43c of the pressure pad 43 can press the tape clamping portion 16 of the element element 30 as described later.

The element attachment portion 48 and the chamfering portion 49 in the manufacturing apparatus 40 of the present embodiment are formed in substantially the same manner as the element attachment portion (also referred to as a caulking portion) and the chamfering portion described in Patent Document 3. Yes.
Briefly described, the element mounting portion 48 of the present embodiment is a pair of right and left caulking punches 48a that press the first leg portion 18a and the second leg portion 18b of the fastener element 10 and plastically deform it toward the fastener tape 3. Have The chamfering portion 49 has a pair of left and right chamfering punches 49a disposed above the left and right caulking punches 48a. The chamfered portion 49 can chamfer the ridge line portion of the tape clamping portion 16 by pressing the tape clamping portion 16 of the fastener element 10 attached to the fastener tape 3 from the left and right sides with the chamfering punch 49a. it can.

  Next, the fastener element 10 shown in FIGS. 2 to 5 is sequentially manufactured from the Y-shaped element wire 50 using the manufacturing apparatus 40 described above, and the manufactured fastener element 10 is further connected to the fastener tape 3. A method of attaching to will be described.

  First, in order to manufacture the fastener element 10, an element wire (Y bar) 50 is prepared as a preparation process. The element wire 50 used in the present embodiment is formed by passing a long metal wire having a circular cross-section through a plurality of rolling rolls and, for example, forming the same cross-section as the element element 30 shown in FIG. Is done.

  In the manufacturing method of the present embodiment, first, the element wire 50 is intermittently supplied to the cutting die 46 from a wire supply unit (not shown) disposed below the cutting die 46 at a predetermined pitch. As a result, the element wire 50 passes through the wire guide hole 46a of the cutting die 46, as shown in FIG. 9, and further from the upper surface (sliding contact surface) of the cutting die 46 by the thickness of the fastener element 10. It can project upward. At this time, the cutting die 46 is stopped at the most advanced position with respect to the cutting punch 47.

  In addition, in the manufacturing apparatus 40 of this embodiment, the manufactured fastener element 10 is plastically deformed and attached to the fastener tape 3 in order while manufacturing the fastener element 10 from the element wire 50 one after another. For this reason, as shown in FIG. 9, when the element wire 50 is projected from the upper surface (sliding contact surface) of the cutting die 46 with a predetermined thickness, the element wire 50 is manufactured one step ahead. The fastened fastener element 10 is already attached to the fastener tape 3 by the caulking punch 48a.

  After causing the wire 50 to protrude on the sliding contact surface of the cutting die 46, the cutting die 46 is moved back together with the wire 50 by the drive mechanism. As a result, the cutting punch 47 moves forward relative to the cutting die 46. For this reason, the element wire 50 is cut at a predetermined thickness (projection amount) protruding on the sliding contact surface by the cutting punch 47 and the cutting die 46 which are cutting means. As a result, the element element 30 having a certain thickness as shown in FIG. 12 is formed.

  In this case, the element element 30 includes a temporary meshing head 31 whose first surface (lower surface) and second surface (upper surface) are flat surfaces, and a tape clamping unit 16 extending from the temporary meshing head 31. The tape clamping surface 19 of the tape clamping part 16 in the element element 30 is not formed with the notch part 21 and the bulging part 22, but has already been formed with the ridge part 23 along the element thickness direction. . The protrusions 23 of the element elements 30 are formed in the element wire 50 when the substantially Y-shaped element wire 50 is produced from the wire 50 by rolling in the preparation step described above.

  The element element 30 cut out from the element wire 50 moves forward relatively while being held by the cutting punch 47 as the cutting die 46 is further retracted, as shown in FIG. It is guided to the position of the forming die 42 arranged.

  When the cutting die 46 moves to the rear end position of the reciprocating motion, the element element 30 that has advanced to the front end portion of the forming die 42 moves away from the cutting punch 47 and falls onto the placement portion 42 a of the forming die 42. Thereby, the element element 30 is mounted on the mounting portion 42a of the forming die 42 in a predetermined direction. At this time, the upper surface of the mounting portion 42 a of the forming die 42 is formed in a surface shape corresponding to the meshing convex portion 13 and the chamfered portion 15 formed on the meshing head portion 11 of the fastener element 10.

  Subsequently, the forming punch 44 and the pressure pad 43 that have been waiting above the forming die 42 are lowered together toward the element element 30 placed on the forming die 42 as shown in FIG. Accordingly, first, the insertion portion 43b of the pressure pad 43 shown in FIG. 8 is inserted between the first leg portion 18a and the second leg portion 18b of the element element 30, and further, the four protruding presses of the pressure pad 43 are pressed. Press molding is performed by pressing the tape sandwiching portion 16 of the element element 30 from above by the portion 43c.

  At this time, the insertion portion 43 b of the pressure pad 43 is inserted into the element element 30 at a position away from the tape clamping surface 19 of the tape clamping portion 16 as described above, and the insertion portion 43 b of the pressure pad 43 and the tape clamping are inserted. A small gap is formed between the portion 16 and the tape clamping surface 19.

  Subsequently, the four protruding pressing portions 43c provided on the pressure pad 43 abut against the first surface of the tape clamping portion 16 of the element element 30, and further descend to a predetermined depth along the element thickness direction. As a result, the tape clamping portion 16 of the element element 30 is locally pressed, and the four notch portions 21 are straightened to the tape clamping portion 16 from the first surface in a predetermined dimension along the element thickness direction. Form.

  Further, the notch 21 is formed in the tape clamping part 16 of the element element 30 by the protruding pressing part 43c of the pressure pad 43, and at the same time, the metal part in the formation region of the notch 21 is plastically flowed, so that the notch A portion adjacent to the bottom surface 21 a of the portion 21 in the element thickness direction bulges from the tape clamping surface 19 toward the tape clamping space 20. As a result, four bulging portions 22 corresponding to the respective cutout portions 21 are formed.

  Therefore, in the present embodiment, the tape clamping portion 16 of the cut element element 30 is pressed along the element thickness direction from above the element element 30 by the protruding pressing portion 43c of the pressure pad 43, The four notches 21 and the four bulges 22 can be easily and stably formed in the tape clamping part 16.

  The pressure pad 43 continues to descend to a predetermined depth, and the element fixing portion 43a (tip surface) of the pressure pad 43 contacts the first surface of the tape clamping portion 16 of the element element 30. Thereby, the tape clamping part 16 in which the notch part 21 and the bulging part 22 of the element element 30 are formed can be sandwiched and fixed between the pressure pad 43 and the forming die 42.

  In addition, as described above, the element element 30 is pressed by the pressure pad 43, and at the same time, the forming punch 44 is lowered to press the element element 30 from above. Such press molding is sometimes called peaking molding. By performing press molding with the forming punch 44 on the temporary meshing head 31 of the element element 30, the above-described meshing concave portion 12, the meshing convex portion 13, the tip inclined portion 14, and the chamfered portion 15 of the fastener element 10 can be stably performed. Can be formed.

  The cutting process of the wire 50 using the cutting die 46 and the cutting punch 47 as described above and the press molding using the pressure pad 43 and the forming punch 44 are performed in accordance with the supply timing of the wire 50 that is intermittently supplied from the wire supply unit. Done. Thereby, the some fastener element 10 of this embodiment can be continuously manufactured from the elongate Y-shaped wire 50. FIG.

  By producing the fastener element 10 of the present embodiment from the Y-shaped wire 50 in this way, the production efficiency is increased as compared with the case where, for example, the fastener element 10 having the same shape is punched from a flat metal plate material. At the same time, the manufacturing cost can be reduced.

  Furthermore, in the manufacturing apparatus 40 of this embodiment, while manufacturing the fastener element 10 as mentioned above, the manufactured fastener element 10 can be attached to the fastener tape 3 in order. In this case, the fastener tape 3 is intermittently pulled up to a predetermined length at a predetermined timing by a tape transport unit (not shown) at a position away from the cutting punch 47 fixedly fixed by a fixed distance.

  As described above, press molding by the pressure pad 43 and the forming punch 44 is performed when the cutting die 46 is stopped at the rear end position (or a position in the vicinity thereof) of the reciprocating motion. For this reason, the fastener element 10 manufactured by press molding first approaches the fastener tape 3 while being placed on the forming die 42 by the cutting die 46 moving forward together with the forming die 42. At this time, as the cutting die 46 advances, the pair of caulking punches 48a of the element mounting portion 48 starts moving, and the first leg portion 18a and the second leg portion 18b of the fastener element 10 are clamped from the outside.

  Furthermore, the fastener tape 3 is inserted between the 1st leg part 18a and the 2nd leg part 18b of the fastener element 10 when the cutting die 46 moves to the front-end position of reciprocation. Thereafter, the first leg portion 18a and the second leg portion 18b of the fastener element 10 are pressed from the outside so as to come close to each other with a pair of caulking punches 48a (plastically deformed). Accordingly, the fastener element 10 is attached (planted) at a predetermined position of the fastener tape 3 at the front end position of the cutting die 46.

  Further, the element wire 50 is supplied from a wire supply unit (not shown) while the cutting die 46 moves to the front end position and the fastener element 10 is attached to the fastener tape 3 as described above. As a result, the element wire 50 is protruded upward on the sliding contact surface of the cutting die 46 by the thickness of the fastener element 10 (that is, the state returns to the state of FIG. 9).

  And a series of operation | movement as mentioned above is performed repeatedly repeatedly, The several fastener element 10 is attached to the tape side edge part of the fastener tape 3 with a predetermined attachment pitch along a tape length direction. . Thereby, a fastener stringer for the slide fastener 1 is manufactured.

  Further, in the manufacturing apparatus 40 of the present embodiment, as shown in FIG. 7, the pair of chamfering punches 49 a of the chamfering portion 49 is disposed above the caulking punch 48 a of the element mounting portion 48. By operating such a pair of chamfering punches 49a, it is possible to chamfer one preceding fastener element 10 already planted on the fastener tape 3.

  In the manufacturing apparatus 40 of the present embodiment described above, the element element 30 is press-molded by the pressure pad 43 and the forming punch 44 to manufacture the fastener element 10, and then the manufactured fastener element 10 is continuously fastened. It has a structure to be attached to the tape 3. However, in the present invention, for example, after the fastener element 10 is manufactured by press molding, the manufactured fastener element 10 can be recovered without being attached to the fastener tape 3. Further, it is possible to perform a polishing process such as barrel polishing on the plurality of fastener elements 10 collected.

  In the fastener element 10 of this embodiment manufactured as described above, a plurality of cutout portions 21 cut out in the element thickness direction are formed in the tape clamping portion 16. Further, the metal material of the fastener element 10 is fluidly plastically deformed along with the formation of the notch 21, so that the bulging portion bulges from the tape clamping surface 19 toward the tape clamping space 20 with a large bulging amount. 22 is formed. In particular, the bulging portion 22 of the present embodiment has a form that bulges larger than the protruding portion 23 in the direction perpendicular to the element thickness direction from the tape clamping surface 19 of the tape clamping portion 16.

  Therefore, when the fastener element 10 of the present embodiment is attached to the fastener tape 3, the bulging portion 22 provided in the tape holding portion 16 is localized on the tape side edge portion (particularly the core string portion 3a) of the fastener tape 3. Strongly pressed into (deeply dig into). At the same time, the fastener tape 3 can be bitten (entered) into the notch portion 21 provided in the tape clamping portion 16. Thereby, the sliding strength and pull-out strength of the fastener element 10 with respect to the fastener tape 3 can be effectively increased.

  Further, the bulging portion 22 of the fastener element 10 of the present embodiment is formed so as to bulge larger than the protruding portion 23 from the tape clamping surface 19. For this reason, even when a polishing process is performed on the fastener element 10 of the present embodiment, for example, before being attached to the fastener tape 3, the bulging portion 22 is clamped in the tape clamping section 16 of the fastener element 10 after the polishing process. It can remain stably in a form bulging from the surface 19.

  In the present invention, the size, location, number, etc. of the cutout portion 21 and the bulging portion 22 provided in the tape clamping portion 16 of the fastener element 10 are provided in the pressure pad 43 of the manufacturing apparatus 40. It can be arbitrarily changed by changing the shape, position, number, etc. of the protruding pressing portions 43c.

  Further, the fastener element 10 of the above-described embodiment is formed with a notch portion 21 formed from the first surface (lower surface) of the tape holding portion 16 and a bulging portion 22 corresponding to the notch portion 21. ing. However, in the present invention, for example, on the mounting portion 42a of the forming die 42 of the manufacturing apparatus 40, the insertion portion and the protruding pressing portion similar to the inserting portion 43b and the protruding pressing portion 43c provided on the pressure pad 43 of the above-described embodiment. It is also possible to provide. As a result, a notch 21 cut out from the first surface (lower surface) and a bulging portion 22 corresponding to the notch 21 are formed in (or instead of) the tape sandwiching portion 16, and the first surface It is possible to manufacture a fastener element in which a notch portion cut out from the opposite second surface (upper surface) and a corresponding bulging portion are formed.

DESCRIPTION OF SYMBOLS 1 Slide fastener 2a 1st fastener stringer 2b 2nd fastener stringer 3 Fastener tape 3a Core string part 4 1st fastener 5 2nd fastener 6 Slider 7 Element row | line | column 7a 1st element row | line | column 7b 2nd element row | line | column 10 Metal fastener Element (metal element)
DESCRIPTION OF SYMBOLS 11 Engagement head 12 Engagement recessed part 13 Engagement convex part 14 Tip inclination part 15 Chamfering part 16 Tape clamping part 17 Crotch part 18a 1st leg part 18b 2nd leg part 19 Tape clamping surface 20 Nipping space 21 Notch part 21a Bottom face 21b side Wall 21c Back end face (inner end face)
22 bulging portion 22a top end surface 23 ridge portion 30 element element 31 temporary meshing head 40 manufacturing apparatus 41 element forming portion 42 forming die 42a mounting portion 43 pressure pad 43a element fixing portion 43b insertion portion 43c protruding pressing portion 44 forming Punch 44a Concave formation pressing part 46 Cutting die 46a Wire guide hole 47 Cutting punch 48 Element mounting part 48a Clamping punch 49 Chamfering part 49a Chamfering punch 50 Wire (Y bar)

Claims (10)

It has a meshing head (11) and a tape clamping part (16) extending from the meshing head (11), and a meshing recess (12) is provided in the first surface of the meshing head (11). A meshing convex portion (13) is projected from the second surface of the meshing head (11), and the tape clamping portion (16) includes a crotch portion (17) extending from the meshing head (11); A pair of first legs (18a) and second legs (18b) extending from the crotch (17) and extending further, and from the first leg (18a) through the crotch (17) A metal fastener element (10) for a slide fastener (1) in which a tape clamping surface (19) is continuously formed over the second leg (18b),
The tape clamping portion (16) is recessed along the element thickness direction from at least one of the first surface and the second surface of the tape clamping portion (16), and at least opens to the tape clamping surface (19). One notch portion (21) and a bulging portion (22) bulging from the tape clamping surface (19) adjacent to the element thickness direction of the bottom surface (21a) of the notch portion (21) The fastener element characterized by having.   The fastener element according to claim 1, wherein the bottom surface (21a) of the cutout portion (21) and the top end surface (22a) of the bulge portion (22) are formed on a continuous single surface.   The said notch part (21) is formed in the taper shape which the space cross section orthogonal to an element thickness direction reduces gradually toward the said bottom face (21a) of the said notch part (21). Fastener element.   The fastener according to any one of claims 1 to 3, wherein the plurality of notches (21) and the plurality of bulges (22) are formed symmetrically with respect to a center plane in the element width direction. element.   The said tape clamping part (16) has a ridge part (23) which protrudes continuously along the element thickness direction on the said tape clamping surface (19). The fastener element as described in.   The fastener element according to any one of claims 1 to 5, wherein the notch portion (21) is recessed from the first surface of the tape clamping portion (16). A wire rod supply section for intermittently supplying an element wire rod (50) having a substantially Y-shaped cross section at a predetermined pitch in the length direction, and cutting the element wire rod (50) at a predetermined thickness. A cutting punch (47) forming an element element (30) having a temporary meshing head (31) and a tape clamping part (16) extending from the temporary meshing head (31), and the element element (30 ) Is formed on the first surface of the temporary meshing head (31) to form a meshing recess (12) and the second of the temporary meshing head (31). A fastener element manufacturing apparatus (40) having an element forming part (41) for forming a meshing convex part (13) on a surface,
The element molding portion (41) is configured to press the tape sandwiching portion (16) of the element element (30) locally from the first surface along the element thickness direction and plastically deform it, thereby pinching the tape. A notch (21) recessed in the part (16) and bulges adjacent to the bottom surface (21a) of the notch (21) by plastic flow accompanying the formation of the notch (21). A protruding pressing portion (43c) that forms a bulging portion (22),
The fastener element manufacturing apparatus characterized by the above-mentioned. The element molding portion (41) is disposed so as to be movable up and down with respect to the forming die (42) on which the element element (30) is placed, and the tape of the element element (30). A pressure pad (43) that presses the clamping part (16) toward the forming die (42), and is arranged to be movable up and down with respect to the forming die (42), and the forming die (42) and the pressure pad ( 43) having a forming punch (44) for performing the press molding on the temporary meshing head (31) of the element element (30) held between,
The pressure pad (43) is suspended from an element fixing portion (43a) for pressing the tape clamping portion (16) of the element element (30) with a tip surface, and a tip surface of the element fixing portion (43a). An insertion portion (43b) inserted between the first leg portion (18a) and the second leg portion (18b) of the tape clamping portion (16),
The protruding pressing part (43c) is formed to project from the outer peripheral side surface of the insertion part (43b) at the base end part of the insertion part (43b) in the pressure pad (43).
The manufacturing apparatus according to claim 7.   The protruding pressing portion (43c) of the pressure pad (43) has a cross-sectional area perpendicular to the extending direction of the insertion portion (43b) as the distance from the distal end surface of the element fixing portion (43a) increases. The manufacturing apparatus according to claim 8, which has a decreasing form. The element wire rod (50) having a substantially Y-shaped cross section is cut at a predetermined thickness, and the temporary engagement head (31) and a tape clamping portion (16) extending from the temporary engagement head (31) are provided. On the first surface of the temporary meshing head (31) by press forming the temporary meshing head (31) of the element element (30). In a method for manufacturing a fastener element, including forming an engaging recess (12) and forming an engaging protrusion (13) on the second surface of the temporary engaging head (31).
When pressing the tape clamping portion (16) of the element element (30) in press molding of the temporary meshing head (31), the tape clamping portion (16) of the element element (30) is removed from the first surface. By forming a notch part (21) recessed in the tape clamping part (16) by locally pressing and plastically deforming along the element thickness direction, the notch part (21) A method of manufacturing a fastener element, comprising forming a bulging portion (22) that bulges adjacent to the bottom surface (21a) of the notch portion (21) by plastic flow accompanying the formation.

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