JP6161708B2 - Fastener chain, slide fastener, and fastener element manufacturing method - Google Patents

Description

  The present invention relates to a fastener chain and a slide fastener having fastener elements whose legs are curved or inclined with respect to the tape width direction, and a manufacturing method for manufacturing the fastener element.

  Generally, a metal fastener element has a meshing head, a trunk extending from the meshing head to one side (rear), and a pair of left and right legs branching from the trunk to bifurcated and extending to one (rear) Part. Further, the meshing head is provided with a meshing convex part and a meshing concave part or a fitting space part into which the meshing convex part of the mating fastener element is fitted.

  As a kind of metal element, a so-called single-sided fastener element (hereinafter simply referred to as a single-sided element) in which a meshing convex portion is provided on one surface (upper surface) side of the meshing head and a meshing concave portion is provided on the other surface (lower surface) side. And a so-called double-sided type fastener element (hereinafter sometimes simply referred to as a double-sided element) in which a pair of meshing convex portions and fitting space portions are provided on both upper and lower surfaces of the meshing head. It has been.

  As an example of a metal single-sided element, for example, a fastener element disclosed in International Publication No. 2013/027281 (Patent Document 1) is known. Further, as an example of a metal double-sided element, a fastener element disclosed in, for example, International Publication No. 2010/088984 (Patent Document 2) is known.

  By the way, the meshing head, body, and legs of the metal fastener element are generally viewed from the tape surface or the back side of the fastener tape with a plurality of fastener elements attached to the fastener tape. Sometimes, they are arranged linearly along the tape width direction (parallel to the tape width direction).

  On the other hand, for example, the left and right element rows are meshed without depending on the meshing convex portion and the meshing concave portion (or the insertion space portion), the appearance is differentiated from other products, or others are differentiated. For this reason, a slide fastener having a configuration in which a part of the fastener element is bent or curved with respect to the tape width direction when viewed from the tape front surface or the tape rear surface side of the fastener tape is also known. Actually, examples of such slide fasteners are disclosed in, for example, US Pat. No. 1,864,614 (Patent Document 3) and US Pat. No. 2,158,079 (Patent Document 4). ing.

  For example, the fastener element described in Patent Document 3 has a meshing head, a trunk, and a pair of legs. The meshing head of this Patent Document 3 is not formed with a meshing convex part or a meshing concave part (or a fitting space part) for meshing with the fastener element of the mating counterpart, and the meshing head is on the tape surface or the tape back surface. When viewed from the side, the left and right element rows are connected to each other when the slide fastener is configured by being inclined with respect to the leg portion and the trunk portion arranged in parallel to the tape width direction of the fastener element. The slide fastener can be closed by meshing.

  Patent Document 4 describes a fastener element having a meshing head and a pair of legs, or a fastener element having a meshing head, a trunk, and a pair of legs. The meshing head or the meshing head and the leg have a shape curved with respect to the tape width direction when viewed from the tape front surface or the tape back surface side.

  The fastener element disclosed in Patent Document 4 prevents one element row from rotating to the tape front side or the tape back side with respect to the other element row in a state where the left and right element rows are engaged. Rotation prevention means is provided.

International Publication No. 2013/027281 International Publication No. 2010/088984 US Pat. No. 1,864,614 US Pat. No. 2,158,079

  Like the fastener element described in Patent Document 3 and Patent Document 4, the meshing head as a part of the fastener element is curved with respect to the tape width direction when viewed from the tape surface or the tape back side. By having, the slide fastener having such a fastener element has a different appearance from the slide fastener having a general fastener element in which the meshing head, the trunk, and the leg are arranged along the tape width direction. The product value of the fastener product can be increased by differentiating from other products.

  However, on the other hand, a slide fastener having a fastener element with a meshing head curved in the tape width direction has a reduced meshing strength when the left and right element rows are meshed due to the curved shape of the meshing head. Invite. In addition, when the left and right fastener tapes are pulled away in a state where the left and right element rows are engaged, or when an external force in the tape front and back direction is applied to the element rows while the left and right element rows are engaged, As a result, the left and right fastener stringers are easily broken, and the lateral pulling strength and push-up strength of the fastener chain are lowered.

  For this reason, the slide fastener in which a part of the fastener element is curved with respect to the tape width direction as in Patent Document 3 and Patent Document 4 is sufficient for use depending on the product in which the slide fastener is used (fastener-attached product). There was a problem of being unable to withstand.

  The present invention has been made in view of the above-described conventional problems, and its specific purpose is to curve a part of the fastener element with respect to the tape width direction when viewed from the tape front surface or the tape back surface side. Provided with a fastener chain and a slide fastener that can be differentiated from other products and can stably secure sufficient engagement strength that can withstand the use of the product when the left and right element rows are engaged. It is another object of the present invention to provide a fastener element used in such a fastener chain and slide fastener.

In order to achieve the above object, the fastener chain according to the first aspect provided by the present invention has, as a basic structure, a pair of left and right fastener tapes, and tapes on opposite tape side edges of the fastener tape. A pair of fastener stringers having a plurality of metal fastener elements attached by caulking along the length direction, wherein the fastener elements are disposed on the meshing head and one end side of the meshing head. and a body portion, it has a pair of legs extending from one end of the body portion bifurcated, the coupling head is opposite to the first main surface and the first major surface second and a head body having a major surface, the mesh projection portion projecting from the first major surface, the second main surface is recessed the coupling concave portion of the head body of the head body a fastener chain with a door, before The first and second main surfaces of the head main body are flat surfaces orthogonal to the tape length direction, and the pair of leg portions are oblique with respect to the first and second main surfaces of the head main body. Ri Na extending curved or inclined in the direction, the barrel, the element length direction, from the edge position of the coupling concave portion, the position of the tape clamping surface of the crotch portion to branch a pair of said legs The main feature is that the first main surface and the second main surface of the body portion are formed in the same plane as the first main surface and the second main surface of the head body. It is what.
In particular, in the fastener chain of the present invention, the pair of leg portions are preferably curved or inclined in the protruding direction of the meshing convex portion with respect to the first and second main surfaces of the head body. .

In addition, the fastener chain according to the second aspect provided by the present invention has, as a basic configuration, a pair of left and right fastener tapes and a tape side edge portion of the fastener tapes along the tape length direction. A pair of fastener stringers having a plurality of metal fastener elements attached by caulking, wherein the fastener element includes a meshing head and a body portion disposed on one end side of the meshing head; A pair of legs that branch out and extend from one end of the body portion, and the meshing head has a first main surface and a second main surface opposite to the first main surface. A head main body provided; a meshing convex portion protruding from the first and second main surfaces of the head main body; and the meshing convex portion and the body portion on the first and second main surface sides. It is arranged in between and inserts the meshing convex part of the meshing partner A fastener chain including a fitting space portion, wherein the first and second main surfaces of the head body are flat surfaces perpendicular to a tape length direction, and a pair of the leg portions are the head portions Ri Na extending curved or inclined direction with respect to the first and second main surfaces of the body, the barrel, the element length direction, from the edge position of the fitting space, the pair It is arranged to the position of the tape clamping surface of the crotch part which branches the leg part, and the first main surface and the second main surface of the body part are the first main surface and the second main surface of the head body. The main feature is that the same plane as the surface is formed .

  In the fastener chain of the present invention as described above, the first main surface, which is the same side surface as the first main surface of the meshing head at the tip of the leg, is the mating counterpart side in the tape length direction. It is preferable that the fastener element is disposed in a region where the head body of the meshing head is formed.

  Further, in the fastener chain of the present invention, the engagement protrusion is the engagement partner side of the fastener with respect to the protrusion dimension in the tape length direction of the engagement protrusion that protrudes from the first main surface of the head body. It is preferable that the ratio of the insertion depth in the tape length direction inserted into the meshing recess or the insertion space of the element is set to 65% or more and 85% or less.

Furthermore, the size of the space between the head bodies of adjacent fastener elements in one of the fastener stringers is defined as a, and the meshing convex portion is in the meshing concave portion or the fitting space portion of the fastener element on the mating counterpart side. It is preferable that the value of b / a is set to 0.25 or more and 0.30 or less, where b is the insertion depth in the tape length direction.
Furthermore, it is preferable that the first main surface of the leg portion has a chamfered surface parallel to the first and second main surfaces of the head body at the distal end portion of the leg portion.

  And according to this invention, a slider is attached to the element row | line | column formed of the said fastener element of the fastener chain which has the structure mentioned above, and a pair of said leg part is said 1st of the said head main body. A slide fastener is provided that is curved or inclined with respect to the second main surface in a direction in which the slider slides so as to engage the pair of fastener stringers.

  In such a slide fastener of the present invention, a break-off fitting having a butterfly pin fixed to the rear end portion of one of the fastener stringers and a box rod fixed to the rear end portion of the other fastener stringer. And the distance between the leg portion of the fastener element arranged at the rearmost end of the element row and the butterfly stick or the box bar is gradually increased toward the tip end portion of the leg portion. It is preferable.

  Next, according to the present invention, there is a meshing head, a body part disposed on one end side of the meshing head, and a pair of meshing convex parts that branch out and extend from one end of the body part. The meshing head includes a head main body having a first main surface and a second main surface opposite to the first main surface, and projects from the first main surface of the head main body. A method of manufacturing a metal fastener element comprising a meshed convex portion and a meshed concave portion recessed in a bottomed shape with respect to the second main surface of the head body, wherein the metal flat wire is made of metal. Forming the meshing convex part and the meshing concave part by press molding, a cutting die, a head-side flat part having a flat surface in contact with the head body, and the head-side flat part Using a cutting punch having a leg forming part curved or inclined in an oblique direction with respect to a flat surface at the tip of the punch A part of the rectangular wire having the meshing convex part and the meshing concave part is punched into the fastener element, and when the fastener element is punched, a pair of the leg parts are connected to the first and second parts of the head body. There is provided a method for manufacturing a fastener element, the main feature of which includes bending or inclining in an oblique direction with respect to the second main surface.

  Such a manufacturing method of the present invention is characterized in that the cutting punch is recessed in the head-side flat part and accommodates the meshing convex part, or protrudes in the head-side flat part and engages the mesh. It is preferable to include using a cutting punch having an insertion protrusion to be inserted into the recess.

  Further, in the manufacturing method of the present invention, when punching out the fastener element, the head side flat portion is brought into contact with the flat wire, and punching is started. Then, the leg portion forming portion is brought into contact with the flat wire to make a pair. Preferably including bending or tilting the leg.

  Furthermore, in the manufacturing method of the present invention, the leg forming portion is provided with a surface that is curved or inclined in a direction opposite to the punching direction with respect to the flat surface of the head-side flat portion, and the cutting It is preferable that a chamfered portion forming portion having a surface parallel to the flat surface of the head-side flat portion is provided at a position corresponding to the tip end portion of the leg portion of the fastener element in the die.

  The fastener chain according to the first aspect of the present invention includes a fastener chain including a pair of fastener stringers in which metal so-called single-sided elements are attached by crimping to opposite tape side edges of a pair of left and right fastener tapes. The first main surface and the second main surface of the head body in each fastener element are flat surfaces orthogonal to the tape length direction, and the pair of leg portions are the first and second main surfaces of the head main body. It is curved or inclined in an oblique direction with respect to the surface.

  Thus, the fastener chain which has the metal single-sided element in which the leg part curved or inclined with respect to the tape width direction has the meshing head part, trunk part, and leg part of the fastener element arranged along the tape width direction. Since it has an appearance different from that of a conventional general fastener chain, it can be differentiated from other products, and the commercial value of a fastener-attached product using the fastener chain can be easily increased.

  In addition, in the fastener chain of the present invention, the first and second main surfaces of the head body in each fastener element are arranged in parallel to the tape width direction, and the meshing protrusion protrudes from the first main surface of the head body. In addition, since the bottomed engagement recess is provided in the second main surface of the head body, the engagement and separation of the left and right element rows can be performed stably. Lateral pulling strength and push-up strength equal to or higher than those of general fastener chains can be stably obtained.

  Furthermore, in the fastener chain of the present invention, the pair of legs are curved or inclined in an oblique direction with respect to the tape width direction and fixed to the fastener tape by caulking, so that the fastener element can be moved forward or in the tape length direction. It can be made difficult to tilt backward, and the posture of the fastener element can be stably held. As a result, when the slide fastener is configured, the left and right element rows can be smoothly engaged and separated, and good slidability of the slider can be secured stably.

  In addition, the contact area between the pair of legs and the tape side edge of the fastener tape is fixed to the fastener tape by the pair of legs of the fastener element being bent or inclined in an oblique direction with respect to the tape width direction. Therefore, the mounting strength of the fastener element with respect to the fastener tape is expected to be improved.

  In the present invention, the first and second main surfaces of the body portion of the fastener element have only flat surfaces orthogonal to the tape length direction, like the first and second main surfaces of the head body. Alternatively, it may have only a curved surface or an inclined surface continuous with the first and second main surfaces of the leg, or may have both a flat surface and a curved surface or an inclined surface. .

In such a fastener chain of the present invention, the pair of leg portions are curved or inclined obliquely in the protruding direction of the meshing convex portion with respect to the first and second main surfaces of the head body.
Usually, in a slide fastener having a metal single-sided element, in order to smoothly engage and separate the left and right element rows, the meshing convex part of the single-sided element has a slider that closes the slide fastener with respect to the head body. Projecting toward the sliding direction, in other words, when the single-sided element moves into the element guide path of the slider, the meshing convex portion protrudes not toward the rear opening side of the slider but toward the shoulder opening side. In general, the single-sided element that has moved near the rear opening of the slider is in a state where the left and right element rows are engaged, so the relative position with respect to the slider is difficult to shift. There is a tendency that the relative position with respect to the slider is easily shifted.

  For this reason, when a slide fastener is configured and the slider is slid in the fastener closing direction, the single-sided element that moves from the shoulder of the slider into the element guide path moves near the shoulder and the leg of the single-sided element becomes the slider. May come into contact. In such a case, the pair of leg portions in the single-sided element is curved or inclined so as to face the shoulder opening side in the same manner as the protruding direction of the meshing convex portion, so that the leg portion of the single-sided element comes into contact with the slider. In addition, the leg portion of the single-sided element can make it difficult to damage the slider.

  Note that when the slider is slid in the fastener opening direction, the single-sided element that moves from the rear opening of the slider into the element guide path is difficult to move near the rear opening. Even if it is curved or inclined, the leg portion of the single-sided element hardly damages the slider.

  Next, the fastener chain according to the second aspect of the present invention includes a pair of fastener stringers in which metal so-called double-sided elements are attached by crimping to opposite tape side edges of a pair of left and right fastener tapes. The first and second main surfaces of the head body in each fastener element are flat surfaces orthogonal to the tape length direction, and the pair of leg portions are the first and second main parts of the head body. With respect to the 2nd main surface, it curves or inclines and extends in the protrusion direction of one meshing convex part.

  In such a fastener chain according to the second aspect, like the fastener chain according to the first aspect described above, the meshing head, trunk, and legs of the fastener element are arranged along the tape width direction. Since it can be differentiated from conventional general fastener chains, the commercial value of fastener-attached products using the fastener chains can be easily increased. In addition, the left and right element rows can be stably engaged and separated, and the lateral pulling strength and push-up strength equal to or higher than those of conventional general fastener chains can be stably obtained.

  In addition, since the pair of leg portions are bent or inclined in an oblique direction with respect to the tape width direction and fixed to the fastener tape by caulking, the fastener element may be difficult to tilt forward or backward in the tape length direction. And the posture of the fastener element can be stably held. As a result, when the slide fastener is configured, the left and right element rows can be smoothly engaged and separated, and good slidability of the slider can be secured stably. Furthermore, since the contact area between the pair of leg portions in the fastener element and the tape side edge portion of the fastener tape is increased, the attachment strength of the fastener element to the fastener tape is also expected to be improved.

  In the fastener chain according to the first and second aspects of the present invention, the first main surface, which is the same side surface as the first main surface of the meshing head at the tip of the leg, is in the tape length direction. In the above, the head body of the meshing head in the mating counterpart fastener element is disposed in the region. As a result, the fastening strength of the fastener element with respect to the fastener tape can be appropriately secured, and the flexibility of the fastener chain is prevented from being lowered due to the leg portion becoming too long, and the appropriate flexibility is stably secured. Can do.

  Further, in the fastener chain of the present invention, the meshing convex portion is a meshing concave portion of the mating counterpart fastener element with respect to the projecting dimension in the tape length direction of the meshing convex portion projecting with respect to the first main surface of the head body. Alternatively, the ratio of the insertion depth in the tape length direction inserted into the insertion space is set to 65% or more and 85% or less, preferably 70% or more and 80% or less.

  By setting the ratio of the insertion depth to the projecting dimension of the meshing convex part to be 65% or more, it is possible to increase the meshing strength of the fastener chain and to obtain the desired lateral pulling strength and thrusting strength that can withstand the use of the fastener-attached product. It can be secured stably. In addition, by setting the ratio of the insertion depth to the projecting dimension of the meshing convex portion to be 85% or less, it is possible to prevent the meshing of the left and right element rows from becoming too strong, and to stabilize the appropriate flexibility of the fastener chain. In addition, it is possible to prevent the slide slidability from being lowered when the slide fastener is configured.

  Further, in the fastener chain of the present invention, the size of the interval between the head main bodies of adjacent fastener elements in one fastener stringer is defined as a, and the meshing convex portion is the meshing concave portion or the fitting space of the mating counterpart fastener element. The value of b / a is set to 0.25 or more and 0.30 or less, where b is the insertion depth in the tape length direction inserted into the part.

  By setting the b / a value to be 0.25 or more, the engagement strength of the fastener chain is increased, and the desired lateral pulling strength and push-up strength that can withstand the use of the fastener-attached product are stably secured. be able to. Moreover, by setting the value of b / a to 0.30 or less, it is possible to stably ensure appropriate flexibility of the fastener chain.

  Furthermore, in the fastener chain of the present invention, the first main surface of the leg portion has a chamfered surface parallel to the first and second main surfaces of the head body at the distal end portion of the leg portion. As a result, the feel and feel of the fastener element can be improved. Further, when the slide fastener is configured and the slider is slid in the fastener closing direction, the leg portion of the fastener element can make the slider more difficult to be damaged.

  According to the present invention, the fastener chain having the above-described configuration is used, and the pair of leg portions of the fastener element provides the element with the slider with respect to the first and second main surfaces of the head body. A slide fastener is provided that is curved or inclined toward the direction of sliding so that the rows engage.

  Such a slide fastener can be easily differentiated from a conventional general slide fastener in which the meshing head, trunk, and legs of the fastener element are arranged along the tape width direction. The commercial value of the fastener-attached product using the slide fastener can be easily increased. Further, the slider can be slid to stably engage and separate the left and right element rows. Furthermore, it is possible to stably obtain a meshing strength equivalent to or higher than that of a conventional general slide fastener.

  In addition, since the pair of leg portions are bent or inclined in an oblique direction with respect to the tape width direction and fixed to the fastener tape by caulking, the fastener element may be difficult to tilt forward or backward in the tape length direction. And the posture of the fastener element can be stably held. As a result, the left and right element rows can be smoothly engaged and separated by sliding the slider, and the good slidability of the slider can be secured stably.

  Such a slide fastener of the present invention includes a break-off fitting having a butterfly bar fixed to the rear end portion of one fastener stringer and a box bar fixed to the rear end portion of the other fastener stringer. The distance between the leg portion of the fastener element arranged at the rearmost end of the element row and the butterfly stick or the box stick is gradually increased toward the tip end portion of the leg portion.

  Thereby, the partial flexibility of the fastener stringer between the fastener element and the butterfly stick or the box stick can be improved, and the orientation of the butterfly stick or the box stick can be easily made in the tape width direction with respect to the element row. It can be tilted. This makes it possible to more smoothly perform the operation of inserting the butterfly stick into the box through the element guide path of the slider and the operation of extracting the butterfly stick from the box through the element guide path of the slider. Therefore, the operability of the separation / insertion tool can be improved.

  Next, a method for manufacturing a metal single-sided element according to the present invention includes forming a meshing convex part and a meshing concave part by press forming a metal flat wire, a cutting die, and a head having a flat surface. Punching a part of a flat wire into a fastener element using a cutting punch having a side flat part and a leg forming part curved or inclined in an oblique direction with respect to the flat surface at the tip of the punch; and When the fastener element is punched, the pair of legs is curved or inclined in an oblique direction with respect to the first and second main surfaces of the head body.

  According to such a manufacturing method of the present invention, the first and second main surfaces of the head main body are flat surfaces orthogonal to the tape length direction, and the pair of leg portions are the first and second main surfaces of the head main body. A single-sided element that is curved or inclined in an oblique direction with respect to the second main surface can be manufactured continuously and stably.

  In particular, the manufacturing method of the present invention can be used as a cutting punch for punching out the fastener element. The recess is provided in the head-side flat part and accommodates the meshing convex part. By using a cutting punch having an insertion protrusion to be inserted, the shape of the meshing convex portion or the meshing concave portion can be easily maintained when the fastener element is punched, so that the meshing convex portion or the meshing concave portion has a predetermined shape. Can be manufactured stably.

  Further, in the manufacturing method of the present invention, when punching the fastener element, the head side flat portion is brought into contact with the flat wire, and punching is started. Then, the leg forming portion is brought into contact with the flat wire to form a pair of legs. Including curving or tilting. Thus, while punching out the fastener element with a cutting punch, the legs of the fastener element are smoothly and stably plastically deformed into a shape that is obliquely curved or inclined with respect to the first and second main surfaces of the head body. Can be made.

  Furthermore, in the manufacturing method of the present invention, the leg forming portion is provided with a surface that is curved or inclined in a direction opposite to the punching direction with respect to the flat surface of the head-side flat portion, and In the cutting die, a chamfered portion forming portion having a surface parallel to the flat surface of the head-side flat portion is provided at a position corresponding to the tip of the leg portion of the fastener element. Thereby, when punching out the fastener element, a chamfered portion (chamfered surface) having a surface parallel to the first main surface and the second main surface of the head body is smoothly and stably formed at the leg tip end portion of the fastener element. Can be formed.

It is a top view which shows the slide fastener comprised using the fastener chain which concerns on Example 1 of this invention. It is a perspective view which shows the fastener element of the slide fastener. It is the front view which looked at the same fastener element from the side by which the meshing convex part of a tape length direction is distribute | arranged. It is the side view which looked at the same fastener element from the tape width direction. It is a fragmentary sectional view which shows and shows a part of element row in a section about the meshing state of the right and left fastener elements in the slide fastener. It is sectional drawing which shows the relationship between a left and right element row | line | column and a slider. It is explanatory drawing explaining the relationship between a left-right element row | line | column and a separation fitting insert. It is sectional drawing explaining the formation process of the meshing convex part and meshing recessed part in manufacture of a fastener element. It is sectional drawing explaining the punching process of the fastener element in manufacture of a fastener element. It is sectional drawing explaining the punching process of the fastener element in manufacture of the fastener element which concerns on another aspect. It is the front view which looked at the fastener element used for the fastener chain which concerns on Example 2 of this invention from the tape length direction. It is sectional drawing of the fastener element.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying 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.

  For example, in the slide fastener in Example 1 below, the separation / insertion tool is arranged at the lower end portion of the fastener chain so as to be continuous with the left and right element rows. It is also possible to provide a stop instead of.

  FIG. 1 is a plan view illustrating a slide fastener configured using the fastener chain according to the first embodiment. 2, 3, and 4 are a perspective view, a front view, and a side view showing a fastener element of the slide fastener.

  In the following description, the front-rear direction refers to the tape length direction of the fastener tape, and is the same direction as the sliding direction of the slider. In particular, the front means the direction in which the slider is slid so that the left and right element rows engage and the slide fastener closes, and the rear means that the slider is separated from the left and right element rows and the slide fastener opens. The direction to slide.

  The left-right direction refers to the tape width direction of the fastener tape, which is parallel to the tape surface of the fastener tape and orthogonal to the tape length direction. The vertical direction is the tape front and back direction perpendicular to the tape surface of the fastener tape, and in particular, the direction on the side where the slider handle is disposed with respect to the fastener tape is the upper side, and the opposite direction is the lower side. And

  The slide fastener 1 according to the first embodiment includes a pair of left and right fastener stringers 10 in which element rows 12 are formed on the side edges of the left and right fastener tapes 11, and a slider slidably disposed along the element rows 12. 30, an upper stopper 5 that is disposed adjacent to the front end side of the element row 12 and prevents the slider 30 from falling off, and a release fitting 6 that is disposed adjacent to the rear end side of the element row 12. .

  In addition, the slide fastener 1 of the present Example 1 has the main characteristics in the structure of the fastener element 20 which forms the element row | line | column 12, For example, the slider 30, the top stopper 5, and the separation fitting insert 6 are as follows. Each of the sliders, top stoppers, and open / close inserts used in a slide fastener having a generally known conventional metal single-sided element has substantially the same configuration.

  For example, the slider 30 of the first embodiment includes a slider body 31 and a handle 32 that is rotatably held by the slider body 31. The slider body 31 includes upper and lower blades 33 and 34, guide pillars 35 connecting the front end portions (shoulder side end portions) of the upper and lower blade plates 33 and 34, and left and right edge portions of the upper and lower blade plates 33 and 34. And left and right flange portions 36, and a handle attachment column 37 that stands on the upper surface side of the upper wing plate 33 and holds the handle 32.

  Left and right shoulder openings are formed at the front end of the slider body 31 with the guide column 35 interposed therebetween, and a rear opening is formed at the rear end of the slider body 31. Further, a substantially Y-shaped element guide path is formed between the upper and lower blades 33 and 34 to communicate the left and right shoulder openings with the rear opening. Further, the left and right fastener tapes 11 are inserted between the left and right upper flange portions 36 disposed on the upper blade 33 in the slider body 31 and the left and right lower flange portions 36 disposed on the lower blade 34. A tape insertion gap is formed.

  The split fitting tool 6 of the first embodiment includes a butterfly bar 7 fixed to the rear end portion of the left fastener stringer 10, a box rod 8 fixed to the rear end portion of the right fastener stringer 10, and a box rod 8. And a box body 9 arranged at the rear end portion. Moreover, the material of the slider 30 and the separation / insertion tool 6 is not particularly limited, and any material can be used.

  Each fastener stringer 10 according to the first embodiment includes a plurality of metal fastener elements 20 arranged at a predetermined pitch on the tape side edge of the fastener tape 11, and the element row 12 includes the fastener tape 11. It is formed by a plurality of fastener elements 20 attached to the. Further, the element chain 12 of the left and right fastener stringers 10 is engaged to form a fastener chain.

  The fastener tape 11 is woven or knitted into a belt shape, and is disposed on a tape main portion serving as an attachment portion with a fastener-attached product and one side edge of the tape main portion, and a plurality of fastener elements 20 are arranged in a row. It has a tape side edge portion (also referred to as an element mounting portion). In Example 1, it is also possible to provide a core string portion formed so as to bulge from the front and back surfaces of the fastener tape 11 at the opposing tape side edges of the left and right fastener tapes 11.

  The fastener element 20 of the first embodiment is made of a metal such as copper, a copper alloy, or an aluminum alloy. As shown in FIGS. 2 to 4, the fastener element 20 includes a meshing head 21 having a meshing convex part 24 and a meshing concave part 25, a body part 22 extending from one end of the meshing head 21, It has a pair of leg parts 23 branched and extended from one end of the part 22.

  Further, the fastener element 20 is configured as a single-sided element in which the meshing convex part 24 and the meshing concave part 25 are arranged on opposite sides of the meshing head 21, and the center position in the element width direction (tape front and back direction). It is symmetrically formed with respect to.

  2 to 4 show the form of the fastener element 20 attached to the fastener tape 11, and the fastener element 20 before attachment has a pair of leg portions 23 from the body portion 22 to the element. The legs are open in the width direction and have a substantially Y-shape.

  The meshing head 21 of the first embodiment is a head body having a constant element thickness dimension (dimension in the tape length direction) between the front surface (first main surface) and the rear surface (second main surface). 21a, a meshing convex portion 24 projecting in a mountain shape on the front side of the head body 21a, and a meshing recess 25 having a bottom surface recessed on the rear surface side of the head body 21a.

  The front surface and the rear surface of the head body 21a are formed as flat surfaces orthogonal to the tape length direction (flat surfaces parallel to the tape width direction), and the dimensions of the head body 21a in the tape length direction are constant. Have As shown in FIG. 5, the meshing convex part 24 and the meshing concave part 25 are arranged so that the position of the meshing convex part 24 on the front side of the head body 21a and the position of the meshing concave part 25 on the rear side correspond to each other. ing.

  In the first embodiment, the length in the tape length direction from the front surface of the head main body 21a to the tip (top surface) of the meshing convex part 24 (height dimension of the meshing convex part 24), and the head main body 21a The dimension in the tape length direction from the rear surface to the bottom surface of the meshing convex part 24 (depth dimension of the meshing concave part 25) is set to a predetermined size, and in particular, the height dimension of the meshing convex part 24 is The value of b / a, which will be described later, is set so as to be within a predetermined range.

  In the element length direction (tape width direction), the body portion 22 according to the first embodiment is arranged from the end edge position of the meshing recess 25 to the position of the crotch tape clamping surface 26 that branches the pair of leg portions 23. Has been. That is, in the first embodiment, the body portion 22 refers to a portion arranged from the end edge position of the meshing recess 25 to the position of the crotch tape clamping surface 26 in the element length direction. A portion disposed on the tape outer side from 22 is referred to as a meshing head 21, and a portion disposed on the tape inner side from the body portion 22 is referred to as a leg portion 23. Moreover, in the present Example 1, the front surface and rear surface of the trunk | drum 22 form the same plane as the front surface and rear surface of the head main body 21a. Further, the front surface and the rear surface of the leg portion 23 described later are formed as curved surfaces or inclined surfaces, but are connected to the front surface and the rear surface of the body portion 22.

  The leg part 23 of the first embodiment extends from the body part 22 toward the tape inward side, and approaches the tip region (end region on the tape inward side) of the pair of leg parts 23 toward each other ( A hook-like bent portion 23a bent inwardly is provided. The inner peripheral surfaces of the body portion 22 and the pair of leg portions 23 are arranged in parallel to the tape length direction, and this inner peripheral surface serves as a tape clamping surface 26 that is in close contact with the fastener tape 11.

  In addition, in the planar view of FIG. 1, the tape outer side in this invention refers to the tape outer side part from the tape edge of the fastener tape 11 to which the target fastener element 20 was attached, 1 indicates a portion inside the tape with respect to the tape edge of the fastener tape 11 to which the target fastener element 20 is attached in the plan view of FIG.

  Further, in the fastener element 20 of the first embodiment, the pair of leg portions 23 mesh with the distal end portion of the leg portion 23 more than the base end portion (end portion on the body portion 22 side) in the plan view of the slide fastener 1. It is curved and extended in an oblique direction with respect to the front surface and the rear surface of the head main body 21a (or with respect to the tape width direction) so as to be positioned in front of the protruding portion 24 in the protruding direction.

  In this case, the front surface of the portion excluding the distal end portion of the leg portion 23 is formed in a curved surface that is curved in a concave shape so as to be positioned on the front side toward the distal end of the leg portion 23 (the tape inward side). Moreover, the rear surface of the leg part 23 is formed in the curved surface curved in the convex shape so that it may be located in the front side as it goes to the front-end | tip (tape inner side) of the leg part 23. FIG. Furthermore, the thickness dimension (dimension in the tape length direction) of the portion excluding the distal end portion of the leg portion 23 has a substantially constant size as a whole.

  In the first embodiment, the pair of leg portions 23 are curved and extended as described above. However, in the present invention, the pair of leg portions has a distal end portion of the leg portion in front of the base end portion. It may extend so as to be linearly inclined in an oblique direction with respect to the tape width direction.

  In order to improve the feel and feel of the fastener element 20 on the front surface side at the distal end portion of the leg portion 23 of the first embodiment, and to prevent the fastener element 20 from being caught on the slider 30 when the slider 30 slides. A chamfer 23b is provided. The chamfered portion 23b is configured by a surface parallel to the front surface and the rear surface of the head body 21a.

  In this case, the curved shape of the leg portion 23 is such that the position of the front surface at the distal end portion of the leg portion 23, that is, the position of the flat surface of the chamfered portion 23b is the head of the fastener element 20 on the mating counterpart side in the tape length direction. It is formed so as to be arranged in the formation region D of the part main body 21a.

  By forming the curved shape of the leg portion 23 in this way, the unique curved shape of the fastener element 20 can be emphasized and manifested, and the appropriate attachment strength of the fastener element 20 to the fastener tape 11 can be stably secured. it can. Moreover, it can prevent that the curvature of the leg part 23 becomes too strong, and can also suppress that the softness | flexibility of the slide fastener 1 falls due to the curved shape of the leg part 23. FIG.

  Further, when the leg portion 23 of the fastener element 20 has the curved shape as described above, a lateral pulling force is applied to the left and right fastener tapes 11 in a state in which the left and right element rows 12 are engaged with each other in a direction in which they are separated from each other. Sometimes, a rotational moment acts on the fastener element 20 where the lateral pulling force is applied. For this reason, in a part of the element row 12, when receiving a lateral pulling force, the left and right fastener elements 20 may rotate in a direction to disengage them.

  Therefore, in the first embodiment, in order to prevent the left and right fastener elements 20 from being disengaged even when subjected to the lateral pulling force as described above, the size of the mounting pitch of the fastener elements 20 and the engagement protrusions of the fastener elements 20 are prevented. As shown in FIG. 5, by adjusting the protruding height of 24, the size of the space between the head main bodies 21a of the adjacent fastener elements 20 in one fastener stringer 10 is defined as a, and the fastener element The value of b / a is 0.25, where b is the size of the insertion depth in the tape length direction in which the 20 engagement protrusions 24 are inserted into the engagement recesses 25 of the fastener element 20 on the engagement counterpart side. It is set to be the above.

  Thus, by setting the value of b / a to be 0.25 or more, the insertion convex portion 24 of each fastener element 20 is inserted into the engagement concave portion 25 of the fastener element 20 on the mating counterpart side. A large depth can be secured. As a result, even if the fastener element 20 receives a lateral pulling force and rotates, the left and right fastener elements 20 will not be disengaged, and the engagement convex portion 24 of the fastener element 20 will be engaged. It is possible to prevent the rotation angle of the fastener element 20 from being further increased by coming into contact with the inner wall surface of the mating recess 25 on the counterpart side.

  Therefore, the engagement state of the left and right element rows 12 can be stably maintained without disengagement of the left and right fastener elements 20, so that the lateral pulling strength of the slide fastener 1 can be increased.

  In addition, as described above, the meshing convex portion 24 of the fastener element 20 abuts against the inner wall surface of the meshing concave portion 25 on the mating counterpart side, and the rotation of the fastener element 20 is suppressed. Thus, the maximum rotation angle of the fastener element 20 that rotates by receiving the lateral pulling force is limited to a size of 20 ° or less, preferably 15 ° or less.

  Furthermore, in the first embodiment, since the b / a value is 0.25 or more, the meshing convex portion 24 can be inserted deeply into the meshing concave portion 25 on the mating counterpart side. The push-up strength representing the strength of the 12 meshing states can also be increased.

  On the other hand, in the first embodiment, by setting the b / a value to be 0.30 or less, the meshing convex portion 24 of each fastener element 20 is in the meshing concave portion 25 of the mating counterpart fastener element 20. Can be prevented from entering too deeply. Thereby, it can suppress that the softness | flexibility of the right and left fastener stringer 10 (fastener chain) in a meshing state falls, and can ensure appropriate softness | flexibility stably.

  Moreover, in the present Example 1, with respect to the size c of the protruding dimension in the tape length direction that protrudes from the front surface of the head main body 21a in the meshing convex part 24, the meshing convex part 24 is the meshing counterpart side fastener element 20. The ratio of the insertion depth size b in the tape length direction inserted into the meshing recess 25 (that is, the value of b / c × 100) is 65% or more and 85% or less, preferably 70% or more and 80% or less. Is set to

  Thus, when the ratio of the insertion depth to the projecting dimension of the meshing convex portion 24 is 65% or more, the meshing convex portion 24 of the fastener element 20 is engaged with the fastener element on the mating counterpart side in the meshed state of the left and right element rows 12. Since it is inserted deeply into the 20 engagement recesses 25, the engagement strength of the slide fastener 1 is increased, and the desired lateral pulling strength and push-up strength can be secured stably.

  Further, when the ratio of the insertion depth to the projecting dimension of the meshing convex portion 24 is 85% or less, the meshing of the left and right element rows 12 is prevented from becoming too strong, and the meshed left and right element rows are hardened. Accordingly, it is possible to stably secure appropriate flexibility of the slide fastener 1 and to smoothly engage and separate the left and right element rows 12 by sliding the slider 30. Good slidability can be stably secured.

  In the first embodiment, as described above, the front surface and the rear surface of the head main body 21a and the front surface and the rear surface of the body portion 22 are arranged on the same flat surface orthogonal to the tape length direction. In addition, the front surface and the rear surface of the leg portion 23 are formed as curved surfaces that are curved in an oblique direction with respect to the front surface and the rear surface of the head body 21a and the trunk portion 22.

  For this reason, the boundary between the flat surface orthogonal to the tape length direction and the curved surface curved in an oblique direction with respect to the flat surface is the position of the boundary between the body portion 22 and the leg portion 23 (in other words, the element length). It is set to the position of the inner peripheral surface of the crotch portion in the vertical direction (tape width direction).

  However, in the present invention, the boundary position between the flat surface and the curved surface is not limited to this, and the front surface and the rear surface of the head main body 21a are formed on a flat surface orthogonal to the tape length direction, and the flat surface thereof. If the leg portion 23 is curved and extended in an oblique direction with respect to the surface, the boundary position between the flat surface and the curved surface is set in the formation region of the body portion 22 in the element length direction (tape width direction). It is also possible to do. That is, a curved surface that curves in an oblique direction with respect to the front surface and the rear surface of the head body 21a can be formed so as to be continuous with the body portion 22 and the leg portion 23 of the fastener element 20.

  In the present invention, the boundary position between the flat surface and the curved surface is more flat when it is away from the head body 21a because the shape of the meshing head 21 can be stabilized and a desired meshing strength can be easily secured. The boundary position between the surface and the curved surface is preferably set to the boundary position between the body portion 22 and the leg portion 23 as in the first embodiment.

Next, a method for manufacturing the fastener element 20 of the first embodiment will be described with reference to FIGS.
First, a flat wire 40 made of metal such as copper, copper alloy, aluminum alloy is pressed using a pair of upper and lower molds 41a and 41b as shown in FIG. Thus, the meshing convex part 24 and the meshing concave part 25 are formed at a predetermined pitch.

  Next, the flat wire 40 having the meshing convex part 24 and the meshing concave part 25 is punched out along the outer peripheral shape of the fastener element 20 by using a cutting punch 42 and a cutting die 43 as shown in FIG. Processing.

  The cutting die 43 is formed with a punched hole 43 a having a cross-sectional shape corresponding to the outer peripheral shape of the fastener element 20. Moreover, the head side flat part 42a provided with the flat surface which contact | abuts at the front-end | tip part of the cutting punch 42 at the part applicable to the head main body 21a and the trunk | drum 22 of the flat wire 40, and its head side flat part 42a. A recess 42b for receiving the meshing protrusion 24, a leg forming portion 42c having a curved surface that bends in an oblique direction with respect to the flat surface of the head-side flat portion 42a, and the fastener element 20 A chamfered portion forming portion 42 d disposed at a position corresponding to the tip portion of the leg portion 23 is provided. In this case, the curved surface of the leg portion forming portion 42c is convexly curved in an obliquely rising direction that is a direction opposite to the punching direction with respect to the flat surface of the head-side flat portion 42a. Further, the chamfered portion forming portion 42d is configured to include a surface parallel to the flat surface of the head-side flat portion 42a.

  Using such a cutting punch 42 and a cutting die 43, the cutting punch 42 is brought into contact with the surface on the front surface side of the fastener element 20 with respect to the flat wire 40 in which the engaging convex portion 24 and the engaging concave portion 25 are formed. By performing the punching process, the fastener element 20 having a predetermined outer peripheral shape is punched, and at the same time, the leg portion 23 of the fastener element 20 to be punched is formed on the front and rear surfaces of the head main body 21a with the meshing convex portion 24. It can be plastically deformed into a curved shape that curves obliquely toward the protruding direction.

  Particularly in this case, the punching 42 is used to make the fastener by cutting the leg portion 42c with the flat wire 40 after the head side flat portion 42a is brought into contact with the flat wire 40 and then the leg forming portion 42c is brought into contact with the flat wire 40. While punching the element 20, the leg portion 23 of the fastener element 20 can be smoothly and stably deformed into a predetermined curved shape.

  Further, since the chamfered portion forming portion 42d is provided at the distal end portion of the cutting punch 42, the chamfered portion forming portion 42d chamfers the distal end portion of the leg portion 23 of the fastener element 20 when the fastener element 20 is punched. The portion 23b can be formed stably.

  Particularly in the first embodiment, when the fastener element 20 is punched, the meshing convex portion 24 formed in advance on the flat wire 40 is accommodated in the accommodating concave portion 42 b provided at the tip portion of the cutting punch 42. Thus, the punching portion of the flat wire 40 can be easily and stably positioned with respect to the cutting punch 42 and the cutting die 43, and the meshing convex portion 24 is deformed when the fastener element 20 is punched. Thus, the shape of the meshing convex portion 24 can be stably held.

  By performing the punching process as described above, it is possible to obtain the fastener element 20 in which the pair of leg portions 23 are opened. Thereafter, the obtained fastener element 20 is subjected to a polishing process, a painting process, etc. The fastener element 20 of Example 1 is manufactured.

  The fastener element 20 according to the first embodiment thus manufactured has a form in which a pair of leg portions 23 are opened in the element width direction from the base end portion on the body portion 22 side toward the tip end portion. For this reason, a tape side edge portion of the fastener tape 11 is inserted between the pair of leg portions 23, and thereafter, the fastener element 20 is plastically deformed by performing a process of caulking the pair of leg portions 23 in an inner direction approaching each other. Thus, the fastener element 20 is attached (planted) to the fastener tape 11.

  Thereby, the fastener stringer 10 is manufactured. Moreover, a fastener chain is obtained by combining the manufactured fastener stringers 10 in pairs and engaging the element rows 12 of the fastener stringers 10 with each other. Further, the slider 30 is attached to the element row 12 of the fastener chain, and the top stopper 5 and the release fitting 6 are fixed at predetermined positions of the fastener chain, whereby the slide fastener of the first embodiment shown in FIG. 1 is manufactured.

  In the slide fastener 1 according to the first embodiment obtained in this way, the leg 23 of each fastener element 20 protrudes from the front and rear surfaces of the head main body 21a in the protruding direction of the meshing protrusion 24 in the tape length direction. Since it has a curved shape that curves to the side, it has a completely different appearance quality from a conventional slide fastener having a normal fastener element, and can be differentiated from other products.

  Furthermore, since the leg portion 23 is formed in a curved shape and is fixed to the fastener tape 11, the fastener element 20 is less likely to tilt forward or backward in the tape length direction. Even if the thickness is reduced (that is, the dimension (thickness dimension) of the leg portion 23 in the tape length direction is reduced), the posture of the fastener element 20 with respect to the fastener tape 11 can be stably maintained. Moreover, since the contact area of the leg part 23 and the fastener tape 11 increases because the leg part 23 is formed in the curved shape, it is also expected that the attachment strength of the fastener element 20 to the fastener tape 11 is improved. .

  Further, in the slide fastener 1 of the first embodiment, the front and rear surfaces of the head main body 21a are arranged in parallel to the tape width direction although the leg portion 23 is formed in a curved shape, and each fastener The meshing head 21 of the element 20 is formed in substantially the same manner as the meshing head of a conventional ordinary normal fastener element. In addition, the value of b / a described above and the protrusion of the meshing convex portion 24 are formed. The ratio of the insertion depth to the dimension is set to a predetermined range.

  Thereby, in the slide fastener 1 of the first embodiment, the left and right element rows 12 can be smoothly meshed by sliding the slider 30, and the good slidability of the slider 30 can be further stabilized. Can be secured. Further, it is possible to stably obtain the lateral pulling strength and the push-up strength equal to or higher than those of a slide fastener having a conventional general fastener element.

  In the first embodiment, even if the leg portion 23 is formed in a curved shape, the bending direction of the leg portion 23 with respect to the front surface and the rear surface of the head main body 21a is the meshing convex portion 24 with respect to the head main body 21a. It faces the front side, which is the protruding direction. Furthermore, in the slide fastener 1 of the first embodiment, the meshing convex portion 24 of the fastener element 20 protrudes in the direction in which the slider 30 is slid relative to the head body 21a so that the slide fastener 1 is closed, For example, as shown in FIG. 6, when the fastener element 20 moves into the element guide path of the slider 30, the meshing convex portion 24 protrudes not toward the rear opening side of the slider 30 but toward the shoulder opening side.

  For this reason, when the slider 30 is slid in the fastener closing direction, the fastener element 20 that moves from the shoulder opening side of the slider 30 into the element guide path becomes easy to move in the tape width direction near the shoulder opening of the slider 30. However, in the first embodiment, the leg portion 23 of the fastener element 20 is curved toward the same front as the projecting direction of the meshing convex portion 24 with respect to the head body 21a. Even if 20 moves and contacts the left and right flange portions 36 of the slider 30, for example, the leg portions 23 of the fastener element 20 can be made difficult to damage the flange portions 36.

  The fastener element 20 located near the rear opening of the slider 30 is in a meshed state and the position in the tape width direction is restricted by the left and right flange portions 36 of the slider 30, so that the fastener element is located near the rear opening of the slider 30. 20 is difficult to move in the tape width direction.

  For this reason, even if the leg portion 23 of the fastener element 20 is curved toward the front, for example, the slider 30 is slid in the direction in which the slide fastener 1 opens, and the left and right fastener elements 20 in the meshed state are moved to the slider 30. When moving from the rear opening into the element guide path, the leg portion 23 of the fastener element 20 is less likely to be caught by the left and right flange portions 36 of the slider 30 and damaged.

  Furthermore, in the slide fastener 1 according to the first embodiment, the leg portion 23 of the fastener element 20 is curved forward, and therefore, for example, as shown in FIG. The distance between the leg part 23 of the fastener element 20 and the butterfly stick 7 or the box stick 8 arranged adjacent to the rear end part of the element row 12 may be gradually increased toward the tip part of the leg part 23. it can.

  Thereby, since the partial flexibility of the fastener stringer 10 between the fastener element 20 and the butterfly stick 7 or the box stick 8 can be improved, for example, the direction of the butterfly stick 7 or the box stick 8 is changed to the element row 12. It is possible to easily tilt the tape in the tape width direction.

  Since the direction of the butterfly stick 7 or the box stick 8 can be tilted in this manner, the operation of inserting the butterfly stick 7 into the box body 9 through the element guide path of the slider 30 or the slider 7 can be moved from the box body 9 to the slider. The operation of extracting through the 30 element guide paths can be performed more smoothly. For this reason, the operativity of the separation fitting insert 6 can be improved.

  In the first embodiment, the separation / insertion tool 6 is configured to include the butterfly bar 7, the box bar 8, and the box 9 as described above, but the present invention is not limited thereto. However, the present invention can be similarly applied to, for example, a case in which a separation / insertion tool is provided in a so-called double-opening type slide fastener capable of separating left and right fastener stringers in both front and rear directions.

  The open / close insert for the double-open type slide fastener, for example, slidably attaches two sliders to the element rows of the left and right fastener stringers so that the rear openings face each other, and It is configured by fixing a butterfly stick to the rear end of one fastener stringer and fixing the butterfly stick to the rear end of the other fastener stringer, eliminating the box that is provided in a normal split-fit insert Has been.

  Moreover, when manufacturing the fastener element 20 of Example 1 mentioned above, after forming the meshing convex part 24 and the meshing recessed part 25 in the flat wire 40, as shown in FIG. The fastener element 20 is manufactured by punching by making contact with the surface (first main surface) on which the meshing convex portion 24 is formed.

  However, in the present invention, after forming the meshing convex portion 24 and the meshing concave portion 25 in the flat wire 40, the cutting punch 47 is replaced with the flat wire 40 by using, for example, a cutting die 48 and a cutting punch 47 as shown in FIG. It is also possible to manufacture the fastener element 20 by punching it by bringing it into contact with the surface (second main surface) where the meshing recess 25 is formed.

  In this case, a cutting hole 48 a having a cross-sectional shape corresponding to the outer peripheral shape of the fastener element 20 is formed in the cutting die 48. Moreover, the head side flat part 47a provided with the flat surface which contact | abuts in the front-end | tip part of the cutting punch 47 at the part applicable to the trunk | drum 22 which covers the head main body 21a of the flat wire 40, and the head side flat part 47a. Are inserted into the engaging recess 25 and a leg forming portion 47c having a curved surface that is curved in a slanting downward direction with respect to the flat surface of the head-side flat portion 47a. Is provided.

  Using such a cutting punch 47 and cutting die 48, the cutting punch 47 is brought into contact with the surface on the rear surface side of the fastener element 20 with respect to the flat wire 40 in which the engaging convex portion 24 and the engaging concave portion 25 are formed. By performing the punching process, the fastener element 20 having a predetermined outer peripheral shape is punched, and at the same time, the leg portion 23 of the fastener element 20 to be punched is formed on the front and rear surfaces of the head main body 21a with the meshing convex portion 24. It can be plastically deformed into a curved shape that bends obliquely in the protruding direction.

  In this case, the insertion protrusion 47b protruding from the tip of the cutting punch 47 is inserted into the meshing recess 25 formed in the rectangular wire 40 in advance, so that the rectangular wire is fixed to the cutting punch 47 and the cutting die 48. The positioning of the punching portion 40 can be easily and stably performed, and the meshing recess 25 can be stably held by preventing the meshing recess 25 from being deformed when the fastener element 20 is punched. it can.

  And the fastener element 20 which a pair of leg part 23 opened can be obtained by performing the above-mentioned punching process. In this case, when the fastener element 20 is punched, the front side of the tip of the leg portion 23 of the fastener element 20 may be scraped to form a chamfered portion 23b. Then, the obtained fastener element 20 is processed to form a chamfered portion 23b at the distal end portion of the leg portion 23 as necessary, and then a polishing process, a painting process, or the like is performed, whereby the single-sided element of the present invention is obtained. Can be manufactured.

FIG. 11 is a front view of the fastener element according to the second embodiment when viewed from the tape length direction, and FIG. 12 is a cross-sectional view of the fastener element.
In the second embodiment, the shape of each fastener element is different from that of the first embodiment, but the other configurations are the same as those of the slide fastener according to the first embodiment. For this reason, in Example 2, the fastener element will be mainly described.

  The slide fastener of the second embodiment is slidable along a pair of left and right fastener stringers in which a plurality of fastener elements 50 are arranged in the side edges of the left and right fastener tapes to form an element row, and along the element row. , A top stopper disposed adjacent to the front end side of the element row, and a break-away fitting tool disposed adjacent to the rear end side of the element row.

  The fastener element 50 according to the second embodiment is made of a metal such as copper, a copper alloy, or an aluminum alloy. As shown in FIGS. 11 and 12, the fastener element 50 includes a meshing head 51 having a meshing convex portion 54 and a fitting space 55, a body 52 extending from one end of the meshing head 51, and It has a pair of leg parts 53 branched and extended from one end of the body part 52 into two branches.

  Further, the fastener element 50 is a double-sided element in which a pair of meshing convex portions 54 and fitting space portions 55 are arranged on the front surface (first main surface) side and rear surface (second main surface) side of the meshing head 51, respectively. And is formed symmetrically with respect to the center position in the element width direction (tape front and back direction).

  The meshing head 51 of the second embodiment has a head main body 51a having a constant element thickness dimension (a dimension in the tape length direction) between the front surface and the rear surface, and a front surface and a rear surface of the head main body 51a. The projecting engagement convex portion 54 and left and right extending portions 57 extending from the body portion 52 toward the tape outward side (head end side) on the front surface and the rear surface of the head body 51a. Yes.

  The head main body 51 a of the meshing head 51 is arranged with a predetermined thickness that is smaller than the body portion 52 through a step. Moreover, the front surface and the rear surface of the head body 51a are formed as flat surfaces orthogonal to the tape length direction (flat surfaces parallel to the tape width direction), and the dimensions of the head body 51a in the tape length direction are constant. Have a size of

  When the meshing head 51 is viewed from the front side as shown in FIG. 1, the leading edge of the head body 51a is arranged in parallel to the element width direction, and the side edge of the head body 51a is The element main body 51a is arranged so as to be inclined or curved with respect to the element length direction so that the dimension in the element width direction gradually decreases toward the tip edge.

  The meshing protrusions 54 arranged on the front surface side and the rear surface side of the head body 51a are projected in a mountain shape from the front surface and the rear surface of the head body 51a at the center in the element width direction. Is formed at a position separated from the head by a predetermined distance.

  The left and right extending portions 57 extend forward from the trunk portion 52 toward the left and right sides of the meshing convex portion 54 with predetermined element thickness dimensions raised from the head body 51a at positions spaced apart from each other. ing. In this case, a predetermined gap is provided between the meshing convex portion 54 and the left and right extending portions 57. Further, the front and rear surfaces of the left and right extending portions 57 are arranged on the same plane as the front and rear surfaces of the body portion 52.

  In the meshing head 51 of the second embodiment, there are fitting space portions 55 surrounded by the meshing convex portions 54, the left and right extending portions 57, and the trunk portion 52 on the front side and the rear side of the head body 51a, respectively. Is formed. Each insertion space 55 has a bottom surface 55a in which the height position in the element thickness direction (tape length direction) is set to the same position as the front surface and the rear surface of the head body 51a.

  The trunk portion 52 of the second embodiment is formed so as to protrude in the element thickness direction from the bottom surface 55 a of the insertion space portion 55, and has a larger element thickness dimension than the head body 51 a of the meshing head 51. The body portion 52 is arranged in the element length direction (tape width direction) from the edge position of the bottom surface 55a of the insertion space portion 55 to the position of the tape clamping surface 56 of the crotch portion that branches the pair of leg portions 53. Has been.

  That is, in the second embodiment, the body portion 52 refers to a portion arranged from the edge position of the bottom surface 55a of the insertion space portion 55 to the position of the crotch tape clamping surface 56 in the element length direction. A portion disposed on the tape outer side with respect to the body portion 52 is referred to as a meshing head 51, and a portion disposed on the tape inward side with respect to the body portion 52 is referred to as a leg portion 53.

  The leg portion 53 of the second embodiment extends from the body portion 52 toward the tape inward side, and approaches the tip region (the end region on the tape inner side) of the pair of leg portions 53 toward each other ( A hook-like bent portion 53a bent inwardly is provided. The inner peripheral surfaces of the body 52 and the pair of leg portions 53 are arranged in parallel to the tape length direction, and the inner peripheral surface serves as a tape clamping surface 56 that is in close contact with the fastener tape.

  Further, in the fastener element 50 according to the second embodiment, the pair of leg portions 53 includes the head main body such that the distal end portion of the leg portion 53 is positioned forward of the proximal end portion (end portion on the body portion 52 side). It curves and extends in an oblique direction with respect to the front surface and the rear surface of 51a (or with respect to the tape width direction).

  In this case, the front surface of the portion excluding the tip portion of the leg portion 53 is formed in a curved surface curved in a concave shape so as to be positioned on the front side toward the tip end (tape inner side) of the leg portion 53. In addition, the rear surface of the leg portion 53 is formed in a curved surface that is curved in a convex shape so as to be positioned on the front side toward the tip end (tape inner side) of the leg portion 53. Further, the thickness dimension (dimension in the tape length direction) of the portion excluding the distal end portion of the leg portion 53 has a substantially constant size as a whole.

  In the present invention, the pair of leg portions 53 extend inclining linearly in an oblique direction with respect to the tape width direction so that the distal end portion of the leg portion 53 is located in front of the base end portion. May be.

  In addition, on the front side of the distal end portion of the leg portion 53 of the second embodiment, in order to improve the feel and feel of the fastener element 50 and to prevent the fastener element 50 from being caught on the slider when the slider slides. A chamfered portion 53b is provided. The chamfered portion 53b is configured by a surface parallel to the front surface and the rear surface of the head body 51a.

  In this case, the curved shape of the leg portion 53 is such that the position of the front surface at the tip portion of the leg portion 53, that is, the position of the flat surface of the chamfered portion 53 b is the head of the fastener element 50 on the mating counterpart side in the tape length direction. It is formed so as to be arranged in the formation region of the part main body 51a.

  Furthermore, in the second embodiment, the meshing convex portion 54 meshes with the mating counterpart fastener element 50 with respect to the size of the projecting dimension in the tape length direction projecting from the front surface of the head main body 51a. The ratio of the size of the insertion depth in the tape length direction inserted into the recess 55 is set to 65% or more and 85% or less.

  When the ratio of the insertion depth to the projecting dimension of the meshing convex portion 54 is 65% or more, the meshing strength of the slide fastener 1 can be increased, and desired lateral pulling strength and thrusting strength can be stably secured. . In addition, when the ratio is 85% or less, the meshing of the left and right element rows 12 is prevented from becoming too strong, and the appropriate flexibility of the slide fastener and the good slidability of the slider can be stabilized. It can be secured.

  Further, in the second embodiment, the front surface and the rear surface of the body portion 52 arranged so as to be orthogonal to the tape length direction, and the curved surface of the leg portion 53 curved in an oblique direction with respect to the flat surface. Is set at the position of the boundary between the body portion 52 and the leg portion 53. However, in the present invention, the boundary position between the flat surface of the body portion 52 and the curved surface curved with respect to the flat surface is set in the formation region of the body portion 52 in the element length direction (tape width direction). May be.

  When manufacturing the fastener element 50 of the present Example 2 as described above, first, a flat wire made of metal such as copper, copper alloy, aluminum alloy is pressed using a pair of upper and lower molds. The rectangular wire is partially plastically deformed to form the meshing convex portions 54 and the insertion space portions 55 at predetermined pitches on both sides of the flat wire.

  Next, a punching process is performed on the rectangular wire formed with the meshing convex portion 54 and the fitting space portion 55 along the outer peripheral shape of the fastener element 50 using a cutting punch and a cutting die.

  In this case, a cutting hole having a cross-sectional shape corresponding to the outer peripheral shape of the fastener element 50 is formed in the cutting die. Moreover, the head side flat part provided with the flat surface which contact | abuts to the head main body 51a of a flat wire at the front-end | tip part of a cutting punch, and the meshing convex part 54 recessed in the head side flat part are accommodated. The housing recess and at least a leg forming portion having a curved surface that bends obliquely with respect to the flat surface of the head-side flat portion are provided.

  By performing punching using such a cutting punch and cutting die, the fastener element 50 having a predetermined outer peripheral shape is punched, and at the same time, the leg portion 53 of the fastener element 50 to be punched is replaced with the head body 51a and The body portion 52 can be plastically deformed into a curved shape that curves in an oblique direction with respect to the direction of the front surface and the rear surface of the body portion 52. And the fastener element 50 of the present Example 2 is manufactured by performing a grinding | polishing process, a coating process, etc. to the obtained fastener element 50. FIG.

  Since the fastener element 50 according to the second embodiment manufactured in this way has a form in which the pair of leg portions 53 are opened, the tape side edge portion of the fastener tape is inserted between the pair of leg portions 53, and thereafter The fastener stringer in which the fastener element 50 is attached to the fastener tape can be manufactured by performing the process of crimping the pair of leg portions 53 in the inner direction approaching each other. Moreover, a fastener chain can be obtained by combining two manufactured fastener stringers in pairs and engaging the element strings of the fastener stringers with each other.

  The slide fastener of the second embodiment configured using the fastener chain obtained in this way has a completely different appearance quality from a slide fastener having a conventional general fastener element. Further, since the leg portion 53 is formed in a curved shape and fixed to the fastener tape, the posture of the fastener element 50 with respect to the fastener tape can be stably held.

  Furthermore, in the slide fastener of the second embodiment, the front and rear surfaces of the head main body 51a are arranged in parallel to the tape width direction in spite of the leg portion 53 being formed in a curved shape. The 50 meshing heads 51 are formed in substantially the same manner as the meshing heads of a conventional ordinary normal fastener element.

  As a result, in the slide fastener according to the second embodiment, the left and right element rows can be smoothly meshed by sliding the slider, and good slidability of the slider can be stably secured. . Further, it is possible to stably obtain a lateral pulling strength and a pushing strength equal to or higher than those of a conventional slide fastener having a general fastener element.

DESCRIPTION OF SYMBOLS 1 Slide fastener 5 Top stop 6 Separation fitting insert 7 Butterfly stick 8 Box stick 9 Box 10 Fastener stringer 11 Fastener tape 12 Element row | line | column 20 Fastener element 21 Engagement head 21a Head main body 22 Trunk part 23 Leg part 23a Bending part 23b Chamfered portion 24 Engaging convex portion 25 Engaging concave portion 26 Tape clamping surface 30 Slider 31 Slider body 32 Pull handle 33 Upper wing plate 34 Lower wing plate 35 Guide post 36 Flange portion 37 Pulling attachment column 40 Flat wire 41a, 41b Die 42 Cutting Punch 42a Head-side flat part 42b Housing recess 42c Leg part forming part 42d Chamfering part forming part 43 Cutting die 43a Punching hole 47 Cutting punch 47a Head side flat part 47b Insertion protrusion 47c Leg part forming part 48 Cutting die 48a Punching hole 50 Snare element 51 Engagement head 51a Head body 52 Trunk part 53 Leg part 53a Bending part 53b Chamfering part 54 Engagement convex part 55 Insertion space part 55a Bottom face 56 Tape clamping surface 57 Extension part a Head body of adjacent fastener element B The size of the insertion depth of the meshing convex portion c The size of the protruding dimension of the meshing convex portion D The formation area of the head body

Claims (13)

A pair of left and right fastener tapes (11), and a plurality of metal fastener elements (20) attached to the opposite tape side edges of the fastener tape (11) by caulking along the tape length direction; A pair of fastener stringers (10) having
The fastener element (20) is bifurcated from one end of the meshing head (21), a body part (22) disposed on one end side of the meshing head (21), and one end of the body part (22). And a pair of legs (23) extending ,
The coupling head (21) includes a head body and the first main surface and the first major surface having a second main surface on the opposite side (21a), the first of the same head main body (21a) A fastener chain comprising a meshing protrusion (24) projecting from a main surface and a meshing recess (25) recessed from the second main surface of the head body (21a),
The first and second main surfaces of the head body (21a) are flat surfaces orthogonal to the tape length direction,
A pair of the leg portions (23), Ri Na extend curved or inclined direction with respect to the said first and second main surfaces of the head main body (21a),
The body portion (22) is, in the element length direction, from the edge position of the meshing recess (25) to the position of the tape clamping surface (26) of the crotch portion that branches the pair of leg portions (23). The first main surface and the second main surface of the body portion (22) are formed in the same plane as the first main surface and the second main surface of the head body (21a). Fastener chain characterized by.   The pair of leg portions (23) are curved or inclined with respect to the first and second main surfaces of the head body (21a) in the protruding direction of the meshing convex portion (24). The fastener chain described. A pair of fastener stringers having a pair of left and right fastener tapes and a plurality of metal fastener elements (50) attached to the opposing tape side edges of the fastener tape by caulking along the tape length direction With
The fastener element (50) is bifurcated from one end of the meshing head (51), a body part (52) disposed on one end side of the meshing head (51), and one end of the body part (52). It becomes a pair of leg portions (53) extending Te,
The coupling head (51), the first main surface and the first major surface and a head body having a second main surface on the opposite side (51a), the first of the same head main body (51a) And a meshing convex portion (54) projecting from the second main surface, and the meshing convex portion (54) and the body portion (52) on the first and second main surface sides are arranged and meshed. A fastener chain comprising an insertion space portion (55) for inserting the mating convex portion (54) of the other party,
The first and second main surfaces of the head body (51a) are flat surfaces orthogonal to the tape length direction,
A pair of the leg portions (53), Ri Na extend curved or inclined direction with respect to the said first and second main surfaces of the head main body (51a),
The body (52) is, in the element length direction, the position of the tape clamping surface (56) of the crotch part that branches the pair of legs (53) from the edge position of the insertion space (55). The first main surface and the second main surface of the trunk portion (52) form the same plane as the first main surface and the second main surface of the head body (51a). Fastener chain characterized by that.   The first main surface, which is the surface on the same side as the first main surface of the meshing head (21,51), at the tip of the leg (23,53) is a meshing counterpart side in the tape length direction. The said fastener element (20, 50) WHEREIN: It arrange | positions in the formation area | region (D) of the said head main body (21a, 51a) of the said meshing head (21,51). Fastener chain.   The meshing projections (24, 54) are smaller than the projecting dimensions in the tape length direction of the meshing projections (24, 54) projecting from the first main surface of the head body (21a, 51a). The ratio of the insertion depth in the tape length direction inserted into the engagement recess (25) or the insertion space (55) of the fastener element (20, 50) on the engagement partner side is 65% or more and 85% or less. The fastener chain according to any one of claims 1 to 4, wherein the fastener chain is set.   In the one fastener stringer (10), the size of the space between the head main bodies (21a, 51a) of the adjacent fastener elements (20, 50) is defined as a, and the meshing projections (24, 54) are When the insertion depth in the tape length direction inserted into the engagement recess (25) or the insertion space (55) of the engagement element side fastener element (20, 50) is b, The fastener chain according to any one of claims 1 to 5, wherein a value of b / a is set to 0.25 or more and 0.30 or less.   The first main surface of the leg (23, 53) has a chamfered surface parallel to the first and second main surfaces of the head body (21a, 51a) of the leg (23, 53). The fastener chain according to any one of claims 1 to 6, which is provided at a tip portion. It is configured by attaching a slider (30) to an element row (12) formed by a plurality of the fastener elements (20, 50) of the fastener chain according to any one of claims 1 to 7,
The pair of legs (23, 53) engages the slider (30) with the pair of fastener stringers (10) with respect to the first and second main surfaces of the head body (21a, 51a). Curved or inclined toward the direction of sliding to fit
A slide fastener characterized by that. An open / close fitting having a butterfly stick (7) fixed to the rear end of one fastener stringer (10) and a box stick (8) fixed to the rear end of the other fastener stringer (10). With an insert (6)
Between the leg (23, 53) of the fastener element (20, 50) arranged at the rearmost end of the element row (12) and the butterfly bar (7) or the box bar (8) The interval is gradually increased toward the tip of the leg (23, 53),
The slide fastener according to claim 8. A meshing head (21), a body part (22) disposed on one end side of the meshing head (21), and a pair of meshing protrusions branched and extended from one end of the body part (22) (24), and the meshing head (21) includes a head main body (21a) having a first main surface and a second main surface opposite to the first main surface, and the head A meshing projection (24) projecting from the first main surface of the main body (21a) and a meshing recess recessed in a bottomed shape from the second main surface of the head main body (21a) A method of manufacturing a metal fastener element (20) comprising a recess (25),
Pressing the metal rectangular wire (40) to form the meshing convex part (24) and the meshing concave part (25);
A cutting die (43, 48), a head-side flat part (42a, 47a) having a flat surface abutting against the head body (21a), and the flat part of the head-side flat part (42a, 47a) Using the cutting punch (42, 47) having a leg forming part (42c, 47c) curved or inclined in an oblique direction with respect to the surface at the tip of the punch, the meshing convex part (24) and the meshing concave part Punching a part of the flat wire (40) formed with (25) into the fastener element (20); and
When the fastener element (20) is punched, the pair of legs (23) is bent or inclined in an oblique direction with respect to the first and second main surfaces of the head body (21a);
A method for manufacturing a fastener element, comprising:   As the cutting punch (42, 47), an accommodating recess (42b) that is recessed in the head-side flat part (42a) and accommodates the meshing convex part (24), or the head-side flat part (47a) 11. The method of manufacturing a fastener element according to claim 10, further comprising using a cutting punch (42, 47) having an insertion protrusion (47b) that protrudes into the engagement recess and is inserted into the meshing recess (25).   When punching out the fastener element (20), the head side flat portion (42a) is brought into contact with the flat wire (40) to start punching, and then the leg forming portion (42c) is moved into the flat wire ( The method for manufacturing a fastener element according to claim 10 or 11, further comprising bending or tilting the pair of leg portions (23) in contact with 40). Providing the leg forming portion (42c) with a surface that is curved or inclined in a direction opposite to the punching direction with respect to the flat surface of the head-side flat portion (42a); and
A chamfer having a surface parallel to the flat surface of the head-side flat portion (42a) at a position corresponding to the tip of the leg portion (23) of the fastener element (20) in the cutting die (43). The method for manufacturing a fastener element according to any one of claims 10 to 12, comprising providing a part forming part (42d).

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