WO2019043851A1

WO2019043851A1 - Sliding fastener element

Info

Publication number: WO2019043851A1
Application number: PCT/JP2017/031260
Authority: WO
Inventors: 千賀子廣見; 太古里; 茂土田
Original assignee: Ykk株式会社
Priority date: 2017-08-30
Filing date: 2017-08-30
Publication date: 2019-03-07
Also published as: CN111031837B; TW201912055A; CN111031837A; BR112020003361A2; TWI653949B

Abstract

A sliding fastener element (3) according to the present disclosure has a composition represented by general formula AlaSibCucMgdTieBf (in terms of mass%, with respect to a, b, c, d, e, and f: "a" is the balance; 0.2≤b≤1.0; 0.1<c≤ 1.8; 0.4≤d≤2.0; 0≤e≤0.05; and 0≤f≤0.01. Unavoidable impure elements may be included.), where the base material is an aluminum alloy containing deposits including Mg and Si. The sliding fastener element (3) includes: a pair of leg portions (10); and a head portion (9) that links the pair of leg portions (10) together and that includes a projection (9b) and a recess (9a) for engagement. The width direction dimension (L1) of the sliding fastener element (3) at the head portion (9) is 80-95% of the width direction dimension (L2) of the sliding fastener element (3) at the pair of leg portions (10), and/or the height of the sliding fastener element (3) at the head portion (9) is 58-98% of the height (H1) of the sliding fastener element (3) at the pair of leg portions (10).

Description

Slide fastener element

The present disclosure relates to a slide fastener element.

One of the manufacturing methods of the metal element (member tooth) for slide fasteners is a Y-bar method in which a metal wire having a substantially Y-shaped cross section is cut at a predetermined thickness. In this Y-bar system, the material of the cut fastener element is composed of a head and a pair of legs extending from the head through the crotch, and the head is pressed by a punch to engage with each other A method of forming a convex portion and a concave portion is generally used (see Patent Document 1). By pressing the head of the Y-bar with a punch, the head is deformed to a large extent particularly in the width direction and the height direction, and is formed into an element shape suitable for a fastener.

In general metal fasteners, the width dimension of the foot and head of the fastener element is generally designed to be the same. Such a design is advantageous in terms of strength and appearance. On the other hand, Patent Document 1 describes that the dimension in the width direction of the head of the fastener element is designed to be slightly smaller than the dimension in the width direction of the leg in order to reduce the manufacturing cost. However, even in the case described in Patent Document 1, the width dimension of the head can not be extremely reduced from the viewpoint of strength and appearance, and in fact, the width direction of the leg portion The dimension in the width direction of the head of the fastener element is about 1.90 mm while the dimension of 2.00 mm is about 2.00 mm, and generally, a difference of about 5% occurs between the width dimension of the leg and the head. The head of the bar is deformed by a punch. In addition, the maximum dimension in the width direction at the concave portion of the conventional fastener element is deformed so as to be about 1.46 mm. Furthermore, the length in the height direction of the surface of the head of the conventional fastener element in the plane perpendicular to the width direction is about 0.45 mm. Since the fastener element described in Patent Document 1 has a relatively large amount of deformation due to processing, it is assumed that it is mainly manufactured using a metal material containing a large amount of copper excellent in workability, and specifically, Preferably, an alloy consisting of 85% copper and 15% zinc is preferred.

In addition, an element for fasteners having an aluminum alloy as a base material is also manufactured, and conventionally, an aluminum alloy of A5056 defined in JIS H4000 excellent in workability has been used. On the other hand, in recent years, materials having higher strength and excellent wear resistance, for example, aluminum alloys containing Mg and Si such as aluminum alloy of A6061 or aluminum alloy of A6005, are elements for fasteners It has been required to produce For example, Patent Document 2 describes an element for a fastener having, as a base material, an aluminum alloy containing a precipitate containing Mg and Si, such as an aluminum alloy of A6061.

Patent No. 3917452 WO 2016/157337 A1

However, when processing is performed with a large deformation equivalent to that described in Patent Document 1 using a high-strength aluminum alloy as described in Patent Document 2 as a base material, convex portions and concave portions of the fastener element are generated. At the same time, a phenomenon in which the head is broken occurs, and a new problem arises in that the productivity is reduced by the amount of the fastener element to be removed.

Then, this indication is made in view of the above-mentioned subject, and provides an element for fasteners with the shape which can ameliorate the problem that a head will be broken at the time of generation of a convex part and a concave part. The purpose is to

A first aspect of the present disclosure, the general _{_{_{_{formula: Al a Si b Cu c Mg}}}} d Ti e B f (a, b, c, d, e, f is the weight%, a is the balance, 0.2 ≦ b ≦ 1.0, 0.1 <c ≦ 1.8, 0.4 ≦ d ≦ 2.0, 0 ≦ e ≦ 0.05, 0 ≦ f ≦ 0.01, and may contain an unavoidable impurity element) An element for a fastener having an aluminum alloy as a base material and having a composition represented by the following formula and containing precipitates containing Mg and Si, for connecting and meshing a pair of legs and a pair of legs: And a head portion having a convex portion and a concave portion, wherein the dimension in the width direction of the fastener element in the head is 80 to 95% of the dimension in the width direction of the fastener element in the pair of legs, and / Or the largest dimension in the width direction of the fastener element at the concave site is the 70 to 75% of the widthwise dimension of the snare element and / or the height of the fastener element at the head is 58 to 98% of the height of the fastener element on the pair of legs The point is that In addition, the height direction means the longitudinal direction of a fastener tape about the element for fasteners of the state attached to the fastener tape as shown in FIG. 1 or FIG. The width direction refers to a direction substantially perpendicular to the facing surface of the fastener tape for the fastener element attached to the fastener tape as shown in FIG. 1 or 2.

According to the present disclosure, it is possible to provide a fastener element capable of solving the problem that the head is broken at the time of generation of the convex portion and the concave portion.

FIG. 1 is a schematic view of a slide fastener according to an embodiment. FIG. 2 is a view for explaining an example of a method of attaching the lower end fitting, the upper end fitting and the element for fastener to the fastener tape. FIG. 3 is a plan view of the fastener element according to one embodiment. It is a top view of the element for fasteners concerning one embodiment. FIG. 4 is a cross-sectional view taken along the line XX in FIG. FIG. 5 is a YY sectional view of FIG.

Hereinafter, the fastener element according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

(composition)
The fastener element according to the present embodiment aims to exhibit high strength and excellent wear resistance by forming a base material of an age-hardened aluminum alloy having a predetermined composition. And

The element for fasteners according to this embodiment has a general formula: Al _a Si _b _{C c} Mg _d Ti _e B _f (a, b, c, d, e, f are mass%, a is the remaining part, 0.2 ≦ b ≦ 1.0, 0.1 <c ≦ 1.8, 0.4 ≦ d ≦ 2.0, 0 ≦ e ≦ 0.05, 0 ≦ f ≦ 0.01, and may contain an unavoidable impurity element The base material is an aluminum alloy having a composition shown in the above and including a precipitate containing Mg and Si.

<Si>
Si, once dissolved in an Al matrix, is subjected to aging heat treatment to form an extremely fine intermetallic compound with Mg, and has the effect of improving the mechanical properties (strength and hardness) of the alloy.

The composition ratio (b) of Si is 0.2 (mass%) ≦ b ≦ 1.0 (mass%), that is, 0.2 mass% or more and 1.0 mass% or less, preferably 0.4 % By mass or more and 0.9% by mass or less, more preferably 0.4% by mass or more and 0.8% by mass or less.

When the composition ratio of Si is too small, it becomes difficult to improve the strength and hardness of the aluminum alloy. On the other hand, when the composition ratio of Si is too large, coarse precipitation or crystallization of Si alone is promoted, and the elongation in plastic deformation becomes small to lower the workability.

In addition, when an appropriate amount of Si is added, it is possible to prevent softening in a heated process (such as water washing or drying) after cold working. In particular, since the atoms (Si) precipitated in the Al matrix by the aging heat treatment prevent migration of dislocations introduced by cold rolling, strength reduction due to the heat treatment can be suppressed. If the composition ratio of Si is too small, the effect is small. On the other hand, if the composition ratio of Si is too large, the cold workability is inferior, so that it is not particularly suitable as a material for a fastener element.

<Cu>
Cu, once dissolved in an Al matrix, is subjected to an aging heat treatment to form extremely minute precipitates, and has the effect of improving the mechanical properties (strength and hardness) of the alloy.

The composition ratio (c) of Cu is 0.1 (mass%) ≦ c ≦ 1.8 (mass%), that is, 0.1 mass% or more and 1.8 mass% or less, preferably 0.1 % By mass or more and 0.8% by mass or less, more preferably 0.15% by mass or more and 0.4% by mass or less.

In addition, when an appropriate amount of Cu is added, it is possible to prevent softening in a heated process (such as water washing and drying) after cold working. In particular, since the atoms (Cu) deposited in the Al matrix by the aging heat treatment prevent migration of dislocations introduced by cold rolling, the strength reduction due to the heat treatment can be suppressed. If the composition ratio of Cu is too small, the effect is small. On the other hand, if the composition ratio of Cu is too large, cold workability and corrosion resistance deteriorate, so that it is not particularly suitable as a material for a fastener element.

<Mg>
By heat treatment, Mg forms an extremely fine intermetallic compound with Si, and has the effect of improving the mechanical properties (strength and hardness) of the alloy. In addition, solid solution of Mg in Al which is a matrix has an effect of improving the mechanical properties (strength and hardness) of the alloy.

The composition ratio (d) of Mg is 0.4 (mass%) ≦ d ≦ 2.0 (mass%), that is, 0.4 mass% or more and 2.0 mass% or less, preferably 0.8 % By mass or more and 2.0% by mass or less, more preferably 0.8% by mass or more and 1.2% by mass or less.

In addition, when an appropriate amount of Mg is added, it is possible to prevent softening in a heated process (such as water washing or drying) after cold working. In particular, since the atoms (Mg) precipitated in the Al matrix by the aging heat treatment prevent migration of dislocations introduced by cold rolling, the strength reduction due to the heat treatment can be suppressed. If the composition ratio of Mg is too small, the effect is small. On the other hand, if the composition ratio of Mg is too large, the cold workability is inferior, so that it is not particularly suitable as a material for a fastener element.

<Ti, B>
As described above, when Cu is added at a rate as high as 0.8% by mass or more, the cold workability usually decreases in the manufacturing process of the fastener element, and cracking occurs. Ti and B may be omitted, but when a small amount is added, the effect of improving the cold workability is obtained. This effect can suppress the decrease in cold workability when the amount of addition of Cu is large. While the present invention is not intended to be limited by theory, it is believed that this effect is manifested by the following mechanism. A compound of titanium and boron such as TiB ₂ is formed, and the compound refines the crystal grains during casting, thereby improving the cold workability. On the other hand, if the crystal grains are not refined, they grow in a dendrite shape and coarsened crystal grains increase, so the possibility of the appearance of coarse crystallized products between the branches increases, and this crystallized product is cold-worked It causes a crack. Trace addition of Ti and B is particularly effective when containing high concentrations of Cu. In the present invention, the composition ratio (e) of Ti is defined as 0 (mass%) ≦ e ≦ 0.05 (mass%), that is, 0 mass% or more and 0.05 mass% or less. When the composition ratio of Ti increases, coarse crystals are produced, and conversely, a decrease in strength is caused. Therefore, the composition ratio of Ti is preferably 0.05% by mass or less, and more preferably 0.03% by mass or less. Further, the composition ratio (f) of B is defined as 0 (mass%) ≦ f ≦ 0.01 (mass%), that is, 0 mass% or more and 0.01 mass% or less. When the composition ratio of B is increased, coarse crystals are produced, and conversely, a decrease in strength is caused. Therefore, the composition ratio of B is preferably 0.01% by mass or less, and more preferably 0.005% by mass or less.

<Unavoidable impurities>
Unavoidable impurities are present in the raw materials and are inevitably mixed in the manufacturing process, and although they are unnecessary originally, they are trace amounts and are acceptable because they do not affect the characteristics. It is an impurity.

In the present embodiment, the content of each impurity element accepted as an unavoidable impurity is generally 0.1% by mass or less, preferably 0.05% by mass or less.

In addition, as other elements having a content higher than the unavoidable impurities, Fe is 0.7% by mass or less, Mn is 0.15% by mass or less, Cr is 0.35% by mass or less, Zn is 0.25 The content is less than or equal to mass%, and the content of Zr is less than or equal to 0.15 mass%, which are acceptable from the viewpoint of the use of the fastener element.

(Production method)
An aluminum alloy of the above-mentioned composition, for example, an aluminum alloy of A6061 defined in JIS H4000, is subjected to T8 treatment (cold-worked after solution treatment, and further artificial age hardening treatment, for example, 5 to 6 at 1700 ° C. The thing which performed the process which heat-processes about time can be used suitably.

Using the wire of the aluminum alloy after the T8 treatment, a working strain having a predetermined rolling reduction is applied by cold rolling to produce a continuous deformed wire having a substantially Y-shaped cross section. Furthermore, an element for fasteners can be obtained by applying various cold workings such as cutting, pressing, bending and bending to form an element having a predetermined size.

(Slide fastener)
The example of the slide fastener provided with the element for fasteners which concerns on this embodiment is concretely demonstrated based on drawing.

FIG. 1 is a schematic view of a slide fastener. As shown in FIG. 1, the slide fastener includes a pair of fastener tapes 1 having a core 2 formed on one side end and a core 2 of the fastener tape 1. Upper and

lower fasteners

4 and 7 fixed to the core portion 2 of the fastener tape 1 at the upper and lower ends of the fastener element 3 by caulking and fixing (mounting) at predetermined intervals and at the upper and lower ends of the fastener element 3 And a slider 6 which is disposed between the pair of opposing fastener elements 3 and which is slidable in the vertical direction for engaging and disengaging the fastener element 3.

A state in which the fastener element 3 is attached to the core 2 of one fastener tape 1 is referred to as slide fastener ファスナー ringer, and the fastener element attached to the core 2 of the pair of fastener tapes 1 A slide fastener chain 7 is called one in which the hook 3 is in a meshing state.

Although not shown, the slider 6 shown in FIG. 1 is pressed at a plurality of steps on a long body made of a plate-like body having a rectangular cross section, and cut at predetermined intervals to produce a slider body, Furthermore, it is what equipped with a spring and a pull handle as needed. Furthermore, the pull is also punched out of a plate-like body having a rectangular cross-sectional shape for each predetermined shape, and this is crimped and fixed to the slider body.

In addition, the lower stopper 5 is a separable insertion tool consisting of a butterfly rod, a box rod, and a box, and even if the slide fastener chain 7 can be separated by the separation operation of the slider 6. I do not care.

FIG. 2 is a view showing a method of manufacturing the fastener element 3, the upper fastener 4 and the lower fastener 5 in the slide fastener shown in FIG. 1 and a method of attaching the fastener tape 1 to the core 2 .

As shown in FIG. 2, the fastener element 3 cuts the deformed wire 8 having a substantially Y-shaped cross section for each predetermined dimension and press-molds it to form a head 9, and then the fastener The pair of legs 10 is attached to the core 2 of the tape 1 by caulking.

The upper stopper 4 cuts the rectangular wire 11 (flat wire) having a rectangular cross-section into predetermined dimensions, forms it into a substantially U-shaped cross-section by bending, and then caulks it to the core portion 2 of the fastener tape 1 It is attached by.

The lower stopper 5 is attached by cutting the deformed wire 12 having a substantially X-shaped cross section for each predetermined dimension and thereafter caulking the core portion 2 of the fastener tape 1.

In FIG. 2, although the fastener element 3, the upper fastener 4 and the lower fastener 5 are simultaneously attached to the fastener tape 1, in fact, the fastener tape 1 is continuously attached to the fastener tape 1. First, install the slide fastener stringer, remove the fastener element 3 in the fastener attachment area of the slide fastener stringer, and close the predetermined fastener element 3 in this area to the fastener element 3 4 or the lower stopper 5 is attached.

In order to perform manufacture and attachment as mentioned above, there is a need for making the element 3 for fasteners, the upper stopper 4 and the lower stopper 5 which are constituent members of a slide fastener into a material excellent in cold workability. .

In this respect, the metal fastener member according to the present embodiment is excellent in cold workability, and can be processed, for example, to a reduction ratio of 70% or more. It is suitable as the material of the stopper 5.

The slide fastener can be attached to various articles, and particularly functions as an opening and closing tool. The article to which the slide fastener is attached is not particularly limited, and examples thereof include daily commodities such as clothing, shoes, shoes and sundries, and industrial articles such as water storage tanks, fishing nets and space suits.

(Structure of Element 3 for Fasteners)
FIG. 3 is a plan view of the fastener element 3 according to this embodiment, and FIG. 4 is a cross-sectional view taken along the line XX in FIG. FIG. 5 is a YY sectional view of FIG.

As shown in FIGS. 3 to 5, the fastener element 3 has a head 9 having a pair of legs 10, a pair of legs 10, and a convex portion 9b and a concave portion 9a for meshing. And have.

As shown in FIG. 3, the dimension L1 in the width direction of the fastener element 3 in the head 9 is 80% or more and less than 95% of the dimension L2 in the width direction of the fastener element 3 in the pair of legs 10, preferably And 83% to 93%. Here, the dimension in the width direction of the fastener element 3 in the head 9 is, as shown in FIG. 3, the width between both end portions in the portion including the convex portion 9 b of the head 9 of the fastener element 3. It is defined as the maximum value of the direction length. Further, the dimension in the width direction of the fastener element 3 in the pair of legs 10 is defined as the maximum value of the length in the width direction between both side ends of the pair of legs 10, as shown in FIG. .

For example, the dimension in the width direction (L1 ′ in FIG. 5) of the fastener element 3 in the conventional head 9 is 1.90 mm, and the dimension in the width direction of the fastener element 3 in the pair of legs 10 is While it is 2.00 mm, the dimension L1 in the width direction of the element 3 for fastener in the head 9 according to the present embodiment is 1.76 mm, and a preferable range is 1.60 mm or more and less than 1.95. It is. Still more preferably, it is 1.66 mm to 1.86 mm.

Moreover, when the dimension L1 of the width direction of the conventional element 3 for fasteners is 1.90 mm, the largest dimension L3 'of the width direction of the concave part 9a of the element 3 for fasteners is 1.46 mm. On the other hand, when dimension L1 of the width direction of element 3 for fasteners concerning this embodiment is 1.76 mm, the maximum dimension L3 of the width direction of concave part 9a is 1.26 mm, and a desirable range As 70% or more and 75% or less of the dimension L1 in the width direction of the fastener element 3.

As shown in FIG. 4, the convex portion 9 b of one fastener element 3 is configured to be engaged with the concave portion 9 a of another adjacent fastener element 3.

As shown in FIG. 4 and FIG. 5, the height H1 of the fastener element 3 in the head 9 is 78% of the height H2 of the fastener element 3 in the pair of legs 10, and 58% as a preferable range The above is 98% or less. Here, the height at the head 9 means the length in the height direction of a plane perpendicular to the width direction of the fastener element at the head of the slide fastener element (in other words, the inclined portion of the convex portion 9 b Define the length of the part not including

For example, when the height H2 of the fastener element 3 in the pair of legs 10 is 1 mm, the height H1 'of the fastener element 3 in the conventional head 9 is 0.45 mm, It is preferable that height H1 of the element 3 for fasteners in the head 9 which concerns on this embodiment is 0.78 mm.

As shown in FIG. 5, by making L1 and / or L2 and / or H1 in this way, deformation of the fastener element in the width direction at the time of formation of the convex portion 9b and the concave portion 9a by punching is The amount is smaller than before.

According to the element 3 for fasteners according to the present embodiment, as shown in FIG. 5, the amount of deformation processing at the time of generation of the convex portion 9b and the concave portion 9a is reduced, so that the head with a large amount of deformation processing as before It has become possible to significantly reduce the occurrence of the problem that the part is broken.

DESCRIPTION OF SYMBOLS 1 ... Fastener tape 2 ... Core part 3 ... Element 4 for fasteners ... Top stop 5 ... Lower stop 6 ... Slider 7 ...

Slide fastener chain

8, 12 ... Atypical wire 9 ... Head 9a ... Concave site 9b ... Convex site 10: Leg 11: Rectangular line

Claims

General formula: Al a Si b Cu c Mg d Ti e B f (a, b, c, d, e, f in mass%, a being the remainder, 0.2 ≦ b ≦ 1.0, 0.1 Mg having a composition represented by <c ≦ 1.8, 0.4 ≦ d ≦ 2.0, 0 ≦ e ≦ 0.05, 0 ≦ f ≦ 0.01 and may contain an unavoidable impurity element), An element for a fastener having an aluminum alloy as a base material and containing a precipitate containing
A pair of legs and a head connecting the pair of legs and having a convex portion and a concave portion for meshing;
The dimension in the width direction of the fastener element in the head is 80% to less than 95%, more preferably 83% to 93% of the dimension in the width direction of the fastener element in the pair of legs. An element for a fastener characterized in that
The fastener according to claim 1, wherein the largest dimension of the concave portion in the width direction is 70 to 75% of the dimension of the head in the width direction of the fastener element. element.
The height of the fastener element at the head portion is configured to be 58% or more and 98% or less of the height of the fastener element at the pair of leg portions. Or the element for fasteners of Claim 2.
General formula: Al a Si b Cu c Mg d Ti e B f (a, b, c, d, e, f in mass%, a being the remainder, 0.2 ≦ b ≦ 1.0, 0.1 Mg having a composition represented by <c ≦ 1.8, 0.4 ≦ d ≦ 2.0, 0 ≦ e ≦ 0.05, 0 ≦ f ≦ 0.01 and may contain an unavoidable impurity element), An element for a fastener having an aluminum alloy as a base material and containing a precipitate containing
A pair of legs and a head connecting the pair of legs and having a convex portion and a concave portion for meshing;
The fastener element is characterized in that the height of the fastener element at the head is 58% or more and 98% or less of the height of the fastener element at the pair of legs. .
The dimension in the width direction of the fastener element in the head is 80% to less than 95%, more preferably 83% to 93% of the dimension in the width direction of the fastener element in the pair of legs. The fastener element according to claim 4, characterized in that:
The maximum dimension of the concave portion in the width direction is 70% to 75% of the dimension of the head in the width direction of the fastener element. Fastener element as described.