KR101517671B1 - Element forming apparatus for slide fastener - Google Patents

Abstract

The present invention provides an element for a slide fastener and an element molding apparatus for a slide fastener. The element forming apparatus includes a cutting die, a forming die, a cutting punch disposed slidably on the upper surface of the cutting die, and a forming punch that moves up and down in cooperation with the forming die. The cutting punch includes a main body having a first blade part for cutting the wire rod in cooperation with the blade part of the cutting die at a front end thereof. On the surface of the main body opposite to the cutting die, a sliding portion for sliding relative to the cutting die is provided extending from the main body. The sliding portion has a second blade portion for projecting toward the front and forming a concave portion in a part of the wire member. The first blade portion has a shape matching with the head portion of the element, And the second blade portion has a second blade surface having a flat inclined surface formed so as to shorten the length of the blade protruding from the top to the bottom.

Description

[0001] ELEMENT FORMING APPARATUS FOR SLIDE FASTENER [0002]

The present invention relates to a slide fastener element and an element molding apparatus for a slide fastener, which are continuously formed by cutting a wire material having a substantially Y-shaped cross section in a transverse direction direction perpendicular to the longitudinal direction of the wire material. More particularly, And an inclined surface is formed at a front end portion of the surface on which the engaging concave portion of the head portion is formed, and an element molding apparatus for a slide fastener.

As a method for forming a so-called 2-way slide fastener element which can be opened and closed in any direction of forward and reverse directions, a metallic wire material having a substantially Y-shaped cross section is intermittently supplied and cut by a cutting punch and a cutting die There is known a method in which an element is formed by successively cutting to obtain an individual material of an element, and then forming the head of the element material by a foaming punch and a foaming die. The formed elements obtained by this method are individually collected in a scattered state, then subjected to polishing or plating, and then transferred to the fastener tape again, or sequentially to the fastener tape successively after the above-described element formation .

Generally, in a metal element of a slide fastener, if the surface of the formed element is not smooth, not only the feeling is bad but also the opening and closing operation by the slider is often not smoothly performed. Therefore, in order to solve such a problem, there has been proposed a method in which individual element materials are obtained by intermittently supplying wire materials formed in a substantially Y-shaped cross section and sequentially cutting them to a thickness of one element by a cutting punch and a cutting die A method of chamfering both the periphery of the element head portion and the outer edge of the leg portion along the next cutting line simultaneously with the cutting of the wire material by the cutting die has already been proposed and practiced by the present applicant See Document 1).

Patent Literature 2 discloses a cutting punch used in a molding apparatus for a metal-made element for a so-called 2-way slide fastener, which can be opened and closed in any direction of forward and backward directions. The cutting punch includes an installation groove, And a blade provided with a blade for receiving the blade.

Japanese Patent Application Laid-Open No. 7-1064 CN 201813969 U

However, in Patent Document 1, in order to chamfer both the outer edge of the peripheral edge portion of the element head portion and the outer edge portion of the leg portion, the chamfered edge has an outline that surrounds the head portion of the wire element- And the end face of the blade has a substantially V-shape in cross section to form a complicated shape. Therefore, there is a problem that chipping (the mold is cut off) and is fragile. Further, since it is necessary to form the chamfering blade along a circular ridge corresponding to the element shape, it is necessary to perform the machining by electric discharge machining, which is costly. Also in Patent Document 2, like the above-described Patent Document 1, there is a problem that the cutting punch becomes complicated, the life of the mold is shortened, and the cost becomes high.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an element molding apparatus for a slide fastener and a slide fastener element having a cutting punch having a simple shape and a low cost.

In order to achieve the above object, the present invention provides a cutting die which reciprocates in a cutting direction of a wire material having a substantially Y-shaped cross section, the cutting die comprising: a cutting die having an insertion through-hole through which the wire rod is intermittently supplied at a predetermined pitch; A cutting punch disposed at a front end of the cutting die, a cutting punch disposed slidably on an upper surface of the cutting die, and a forming punch disposed above the peak shaping position to move up and down cooperatively with the forming die Wherein the cutting punch includes a main body having a first blade portion for cutting the wire rod in cooperation with a blade portion of the cutting die at a front end thereof, A slidably moving portion that slides relative to the cutting die is extended from the main body Wherein the sliding portion has a second blade portion for projecting forward and forming a recess in a part of the wire rod, wherein the first blade portion includes a head portion of the element, And the second blade portion has a second blade surface having a flat inclined surface formed so as to shorten the length of the blade protruding from the top to the bottom. The slide fastener for a slide fastener according to claim 1, Thereby providing an element molding apparatus.

According to this configuration, since the first and second blade surfaces of the cutting punch have a simple structure, the life of the mold can be prolonged and the blade can be used for a long time.

In the above-described configuration, it is preferable that the first and second surfaces are formed by grinding.

According to this configuration, since all the cutting punches can be formed by grinding, it is possible to manufacture the cutting punches at a relatively low cost.

In the above-described configuration, it is preferable that the side surface of the tip end of the forming punch has a groove extending toward the bottom surface of the tip end.

According to this configuration, the tip end of the forming punch is made similar to the head portion shape of the element, whereby the press formability can be improved, and the pushing strength and the transverse pulling strength in the bending direction can be made equal to each other.

Further, the present invention is an element for a slide fastener to be formed by cutting an intermittently supplied wire rod having a substantially Y-shaped cross section by a cutting die and a cutting punch, and then forming an acid between the forming punch and the forming die, And a pair of leg portions extending from a rear end portion of the engaging head portion, wherein the engagement recess portion of the engaging head portion is formed with the engaging concave portion, Wherein an inclined surface is formed at a front end of the engaging convex portion, and the longest width of the inclined surface is set to be longer than the width of the bottom surface of the engaging convex portion and shorter than the width of the engaging concave portion.

The bottom surface of the engaging convex portion is not caught by the edge of the front end portion of the surface on which the engaging concave portion is formed when the slider is operated because the front end portion of the surface on which the engaging recess portion of the engaging head portion is formed has the inclined surface, Lt; / RTI > Further, by setting the width of the inclined surface as described above, burrs and the like do not occur during molding, and the molded element has a smooth surface.

In the above-described configuration, the engaging head portion includes a portion having a first width equal to the width of the leg portion, a portion having a second width smaller than the first width, and a portion formed on the front end side of the portion having the first width And the portion having the first width and the portion having the second width are preferably connected by the stepped inclined surface.

According to this configuration, the engaging convex portion itself can be designed to be small.

In the above-described configuration, it is preferable that both side surfaces of the engaging convex portion have inclined surfaces composed of flat surfaces extending toward the bottom surface of the engaging convex portion.

According to this configuration, when the elements are engaged with each other, rotation of the element prevents the engagement of the elements from being shifted.

According to the present invention, a method of forming an element from a metal wire having excellent productivity is employed, and a second blade portion for forming a flat inclined surface at the outer end edge of the head portion of the element is provided in the cutting punch. The cutting punch can be formed by grinding all of the cutting punches because it is unnecessary to process the punching work with a high-cost electric discharge machining, which is required, and thus it is possible to manufacture the cutting punch at a relatively low cost. Further, at the same time as the forming, a flat inclined surface is formed at the outer end edge of the head portion of the element, so that the feel of the element is improved. At the same time, when the slider is operated, the bottom surface of the engaging convex portion is not caught by the edge of the front end portion of the surface having the engaging concave portion , Good sliding ability is maintained, and smooth opening / separating operation of the slide fastener by the slider is assured. The present invention provides an element forming apparatus and a slide fastener element for a slide fastener having a cutting punch having a simple shape and a low cost.

1 is a perspective view of a continuous manufacturing apparatus of a fastener stringer.
2 is a detailed view of a cutting punch;
Fig. 3 is a central sectional view of the continuous production apparatus of the fastener stringer in Fig. 1; Fig.
Fig. 4 is a plan view of an element manufactured by the manufacturing apparatus of Figs. 1 to 3; Fig.
Fig. 5 is a perspective view of the element of Fig. 4 as viewed from the rear side. Fig.
Figure 6 is a front view of the element of Figure 4;
7 is a schematic view of a forming punch.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

In the illustrated embodiment, the present invention is applied to a molding insert device for a slide fastener element. Needless to say, the present invention is not limited to the above-mentioned molding insert device, but can be applied to, for example, an element molding apparatus which once collects the individually molded element without being transplanted to the fastener tape, It is applicable to all devices for forming an element from a metal wire having a mechanism.

Fig. 1 is a perspective view of a continuous manufacturing apparatus for fastener stringers according to the present invention. A cutting die 1 disposed in a ram (not shown) is supported so as to be reciprocally movable in the directions of arrows c and d through a guide mechanism (not shown). In this specification, when describing the fastener stringer continuous manufacturing apparatus, the arrow c direction shown in Fig. 1 is treated as forward and the arrow d direction is treated as rearward.

As shown in Fig. 3, a forming die 4 is assembled to the front end face of the cutting die 1. The cutting punch 2 and the forming punch 3 are arranged at a predetermined position of a frame which is a part of the present apparatus (a device for forming a slide fastener) (not shown) e, and f, respectively. Therefore, a set of the cutting die 1 and the forming die 4, and a set of the cutting punch 2 and the forming punch 3 are opposed to each other so as to move relative to each other. In this specification, when describing a continuous manufacturing apparatus of a fastener stringer, the arrow e direction shown in Fig. 1 is treated as downward and the arrow f direction is treated as an upward direction. The direction perpendicular to the longitudinal direction and perpendicular to the vertical direction is treated as the width direction.

Although the cutting die 1 and the forming die 4 are described as being separate members, the cutting die 1 and the forming die 4 need not necessarily be separate members. .

As shown in Figs. 1 and 3, the cutting die 1 is formed with an insert-through groove of the wire W for element forming. The element forming wire material W having a Y-shaped cross section is inserted in the wire material insertion through groove and is fed intermittently upwardly of the figure at a predetermined pitch by the thickness of the element E by a wire material feed means (not shown). The wire rod insertion groove has a blade portion 5 at an upper end edge thereof. The blade portion 5 of the cutting die 1 comes into contact with one side surface of the wire member W and the first blade member 6 of the cutting punch 2, As shown in Fig.

Fig. 2 is a detailed view of the cutting punch 2. Fig. 1 and 2, the cutting punch 2 cooperates with the blade part 5 of the cutting die 1 to press the first blade part 6 cutting the element forming wire material W toward the front side And a main body 10 having a protruding portion at its front end. The main body 10 of the main body is provided with a sliding portion 11 extending on the surface facing the cutting die 1 to slide relative to the cutting die 1, (11) is provided with a second blade (7) protruding forward in the sliding direction of the cutting die. That is, the second blade portion 7 extends in the same direction as the first blade portion 6. The second blade portion 7 is for forming a concave portion on a part of the element forming wire material W. The main body 10 is provided with a fixing member 12 for fixing the cutting punch 2 to a frame of the apparatus not shown by brazing and is fixed to the fixing member 12 by bolts And a connection hole 13 to be connected is formed. This allows the cutting punch 2 to be fixed to a frame (not shown) by connecting the bolt to the connecting hole 13, and the cutting blade 1 can be slidably moved relative to the cutting die 1, So as to cut the wire W for element formation.

The first blade portion 6 has a concave portion that is open on the upper side and the lower side, and the inner surface of the concave portion is the first blade surface 8. The first blade surface 8 has a shape conforming to a portion where the element E is head-mounted. The second blade section (7) has a second blade surface (9) having a flat inclined surface formed so as to shorten the length of the blade projecting toward the element forming wire material (W) from the top to the bottom. The edge of the second blade portion 7 protruding most to the element forming wire member W is a length of an integral multiple of the thickness of one element of the element cut in the vertical direction from the lower surface of the first blade surface 8, Are spaced apart by a predetermined thickness. Here, the first blade portion 6 and the second blade portion 7 have the same shape along the vertical direction, and the second blade portion 7 has the same shape along the left and right direction. As a result, both the first blade portion 6 and the second blade portion 7 And can be easily formed by grinding, so that the molding cost can be significantly reduced as compared with the cutting punch 2 of Patent Document 1. [

The foil punch 3 for forming the mountain shape of the element E is provided in front of the cutting punch 2 through a punch holder (not shown) fixed to a frame (not shown). Further, in order to stabilize the forming force, a pressure pad 16 for pressing the leg portions 41, 41 of the element E adjacent to the forming punch 3 may be provided. As shown in Fig. 7, the forming punch 3 has a groove 15 on the rear side surface of the tip end. The groove 15 has an inclined surface composed of a flat surface extending toward the bottom surface of the tip end. This groove 15 is required to prevent the front edge of the engaging concave portion 45 from being thinned because the inclined surface 43 of the element described later is formed, The thickness of the wall forming the front side of the engaging concave portion 45 can be made thick by forming the engaging recess 45 with the recess 3.

Hereinafter, a process of forming the element E from the metal wire, which is the element forming wire W, by the molding apparatus of the slide fastener element of the embodiment will be briefly described.

First, the set of the cutting die 1 and the forming die 4 is placed at the forward end in the direction of arrow c and the forming punch 3 and the pressure pad 16 are placed at the raised end in the direction of arrow f, The wire rod W is upwardly projected from the end face opposed to the cutting punch 2 of the cutting die 1 by a thickness corresponding to one element.

Subsequently, the set of the cutting die 1 and the forming die 4 is moved in the direction of the arrow d. This movement causes the cutting die 1 to slide relative to the cutting punch 2 so that the first blade portion 6 of the cutting punch 2 cooperates with the blade portion 5 of the cutting die 1, The upper end of the forming wire W is cut into an element material.

The material of the element is fed to the first blade portion 6 of the cutting punch 2 by the force of sliding of the set of the cutting die 1 and the forming die 4 in the arrow d direction, And is transferred to the mountain-shaped forming position between the forming die 4 and the forming punch 3. The foil punch 3, the pressure pad 16 and the foaming die 4 form the foil punch 3 and the pressure pad 16 Is lowered in the direction of the arrow e, and the engaging convex portion and the engaging concave portion of the element are formed in cooperation with the forming die 4, that is, the engaging head portion of the element is molded.

The lower side of one element of the cut end of the element forming wire material W is cut by the second blade portion 7 of the cutting punch 2 at the end of the stroke of cutting the above- The recessed portion 14 is formed on the side surface of the element forming wire member W by pressing and molding. Since the second blade portion 7 has the second blade surface 9 having a flat inclined surface formed so as to shorten the length of the blade protruding from the element-forming wire material W toward the bottom, the concave portion of the element- 14 are also formed on a flat inclined surface in conformity with the second blade surface 9.

The formation of the concave portion 14 is carried out in such a manner that the above-described set of the cutting die 1 and the forming die 4 is a relative movement to the set of the forming punch 2, the pressure pad 16 and the forming die 3 After the completion of the molding of the concave portion 14 described above, the two sets of the elements are counter-moved in the reverse direction again to return to the initial state, and the element forming wire material W is equivalent to the thickness of one element And is fixed, and the above-described operation is repeated.

The upper edge of the concave portion 14 comes to a position coinciding with the end face of the cutting die 1 by the protrusion having a length corresponding to this thickness.

The formed elements as described above are sequentially transferred to the fastener tape T by the caulking punch 17, so that the fastener stringer S is formed.

Figs. 4 to 6 show the element E molded as described above. As shown in the figure, the element E includes an engaging head portion 42 having an engaging recess portion 45 on one side and an engaging convex portion 44 on the other side, and an engaging head portion 42 extending from the engaging head portion 42 And a pair of leg portions (41).

In this specification, in describing an element, the side of the engaging head is referred to as the front side and the leg side is referred to as the rear side, as shown in Fig. Further, one surface on which the engaging concave portion 45 is formed is referred to as the front surface side, and the other surface provided with the engaging convex portion is referred to as the back surface side, and the front and rear directions in which the direction is given and the direction perpendicular to the front and back direction are treated as the width direction do.

A flat inclined surface 43 formed to fit the second blade surface 9 is formed at the front end of the surface on which the engaging recess 45 of the engaging head portion 42 is formed.

The bottom surface of the engaging convex portion 44 is engaged with the engaging concave portion 45 when the slider is operated because the inclined surface 43 is formed at the front end of the surface on which the engaging concave portion 45 of the engaging head portion 42 is formed. It is possible to maintain a good sliding property. In addition, since the inclined surface 43 is kept in the required minimum amount, it is molded so as not to cause burrs or the like.

5, an inclined surface 47, which is a flat surface extending toward the bottom surface of the engaging convex portion 44, is formed on the leg side of the side surface 48 of the engaging convex portion 44. As shown in Fig. This is to prevent the engagement of the elements with each other when the elements rotate together when the elements are engaged with each other. In addition, preferably, in the engaging concave portion 45, an inclined surface made of a flat surface is formed at a position opposite to the inclined surface 47 to further prevent the rotation.

6, the longest width W2 of the inclined surface 43 is set to be longer than the width W3 of the bottom surface of the engaging convex portion 44 and to be shorter than the width W1 of the engaging concave portion 45. [ If a slope 43 having a width larger than the width W1 is to be made, buckling will occur. When the width W2 is not larger than the largest width W3 of the bottom surface of the engaging convex portion 44, when the slider operation is performed, the bottom surface of the engaging convex portion 44 is engaged with the front end portion of the surface on which the engaging concave portion 45 is formed It is caught by the rim and the sliding property is deteriorated. Therefore, by setting the width of the inclined surface 43 as described above, the molded element has a smooth surface without burrs or the like during molding.

The engaging head portion 42 has a portion having a first width W5 equal to the width of the leg portion 41 and a portion having a second width W6 smaller than the first width W5, And the portion having the first width W5 and the portion having the second width W6 are connected by the stepped inclined surfaces 46 having different angles.

In order to satisfy the width W3 < the width W2, the element is designed so that the width W3 is minimized. As the method, the engaging convex portion 44 itself which determines the width W3 is designed to be small. However, since the entire element can not be designed small, the element is designed so that the width W6 is smaller than the width W5. The leg portion 41 needs a predetermined width W5 in order to secure the installation strength of the element itself.

Further, there is no particular limitation as long as it is possible to form the fastener element as the element forming wire. It is preferable that the metal material is a wire material for sectioning an element.

INDUSTRIAL APPLICABILITY As apparent from the above description, according to the present invention, a method of forming an element from a metal wire having excellent productivity is adopted, and a second blade portion for forming a flat inclined surface at the outer end edge of the head portion of the element is provided in the cutting punch , It is not necessary to process the electric discharge machining with a high cost, which is required in the conventional element forming apparatus, and all the cutting punches can be formed by grinding, so that it can be manufactured at a relatively low cost. In addition, since a flat inclined surface is formed at the outer end edge of the head portion of the element at the same time of molding, the feel of the element is improved, and the bottom surface of the engaging convex portion is not caught by the edge of the front end portion of the surface having the engaging concave portion It is possible to maintain a good sliding property and ensure smooth separation of the slide fastener by the slider. The present invention provides an element molding apparatus, an element molding method, and an element for a slide fastener having a cutting punch having a simple shape and a low cost.

Claims (6)

A cutting die (1) reciprocating in the cutting direction of a wire (W) having a Y-shaped cross section and comprising: a cutting die (1) having an insert through groove through which the wire (W) intermittently supplied at a predetermined pitch is inserted )Wow,
A forming die 4 provided at a front end of the cutting die 1,
A cutting punch 2 disposed slidably on an upper surface of the cutting die 1,
And a forming punch (3) arranged above the mountain shape forming position and cooperating with the forming die (4) to move up and down. The element forming device for a slide fastener,
The cutting punch 2 has a main body 10 having a first blade portion 6 at its tip end in cooperation with a blade portion 5 of the cutting die 1 to cut the wire W,
On the surface of the main body (10) opposite to the cutting die (1), a sliding portion (11) slidable with respect to the cutting die (1) is extended from the main body (10)
The sliding portion 11 is a sliding movement direction of the cutting die 1 and includes a second blade portion 7 for projecting forward and forming a concave portion 14 on a part of the wire rod W Have,
The first blade portion 6 has a first blade surface 8 having a shape corresponding to a portion of the wire member W where the element E is headed,
The second blade part (7) has a second blade surface (9) having a flat inclined surface formed so as to shorten the length of the blade protruding from the top to the bottom,
Characterized in that the side surface of the tip end of the forming punch (3) has a groove (15) extending toward the bottom surface of the tip end of the forming punch (3). The device for forming a slide fastener according to claim 1, wherein the first blade surface (8) and the second blade surface (9) are surfaces formed by grinding. delete delete delete delete

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