Slider for zipper and method for manufacturing the same

Abstract

A slider for a zipper, which has been coated with a coating that is inexpensive, has a thin film thickness, has a reliable rust prevention effect, and is also beautiful in appearance. A body (12) that is slidably mounted on a zipper tape includes a main body (13) formed of iron or an iron alloy. On the surface of the main body (13), a base chemical conversion coating film (84), a transparent coating film (90), and a metal coating film (96) are laminated in sequence from the surface of the main body (13). The total film thickness of the base chemical conversion coating film (84), the transparent coating film (90), and the metal coating film (96) is 23 μm or less. The thickness of the transparent coating film (90) is 4 μm or less, and the thickness of the metal coating film (96) is 22 μm or less.

Description

Technical Field

[0001] The present invention relates to a slider for a zipper that opens and closes a pair of zipper tapes and a method for manufacturing the same. Background Art

[0002] A slider for a zipper includes: a body that is attached to a pair of zipper tapes and opens and closes the pair of zipper tapes by sliding; and a pull tab that is attached to the body and operates the body. Further, there is a slider for a zipper having an automatic stop mechanism, which has a leaf spring having a stop claw, and the leaf spring is elastically deformed by the up-and-down operation of the pull tab to move the stop claw, thereby performing stopping and stop release.

[0003] The body is formed of, for example, iron or an iron alloy, and a sacrificial corrosion protection plating layer of Ni-Zn is formed on the outer surface of the iron or iron alloy as a base, and the body is manufactured by performing coloring treatment such as plating on this base. Since the film thickness of the plating is thin, it does not affect the shape of the outer surface of the iron or iron alloy. Therefore, in a slider for a zipper having an automatic stop mechanism, the leaf spring can be reliably attached, and the operations of stopping and stop release can be performed smoothly.

[0004] However, plating has a problem of high cost. In addition, the number of types of colors obtainable by plating is smaller than the number of types of colors obtainable by painting. Therefore, as a surface treatment that can suppress costs, obtain various colors, and is cheaper than plating, there are various metal painting methods. For example, there are a bright light alloy wheel and a method for forming a coating film thereof disclosed in Patent Document 1, and a method for forming a pattern coating film having a metallic feeling disclosed in Patent Document 2. These painting methods are all performed by laminating a base layer, a metal layer, a transparent layer, and the like.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2007-126116

[0008] Patent Document 2: Japanese Unexamined Patent Application Publication No. 10-43675 Summary of the Invention

[0009] Problems to be Solved by the Invention

[0010] However, if the body of the slider for a zipper is painted as in each of the patent documents, there are the following problems: the film thickness on the surface becomes thick, and the outer dimensions of the thinner portions of the body are in error. Particularly in the case of a slider for a zipper having an automatic stop mechanism, there may be the following adverse conditions: the mounting position of the leaf spring is in error, and the engagement of the locking piece of the leaf spring with the locking portion of the slider for a zipper becomes insufficient.

[0011] The present invention is made in view of the problems of the above-mentioned background art, and aims to provide a slider for a zipper and a manufacturing method thereof. The slider for the zipper is coated, the coating is inexpensive, the film thickness is relatively thin, it has a reliable rust prevention effect, and it is also beautiful in appearance.

[0012] Solution for Solving the Problem

[0013] The present invention relates to a slider for a zipper. A body that is slidably mounted on a zipper tape is composed of a main body formed of iron or an iron alloy. On the surface of the main body, a transparent film and a metal film are sequentially laminated from the surface of the main body. Moreover, a base chemical conversion film can be provided between the main body and the transparent film.

[0014] The base chemical conversion film is a phosphate chemical conversion film or a zirconium-based chemical conversion film. The phosphate of the phosphate chemical conversion film is, for example, zinc phosphate, iron phosphate, or manganese phosphate.

[0015] The body is provided with a tooth guiding path through which the zipper tape passes in a predetermined direction. An inner peripheral surface of the tooth guiding path has a shielding portion. At this shielding portion, the metal film is thinner than the metal film on the surface of the body, or the metal film is not provided, and at this shielding portion, the transparent film is partially exposed.

[0016] The total film thickness of the base chemical conversion film, the transparent film, and the metal film of the body is 23 μm or less. The thickness of the transparent film is 4 μm or less. In addition, the thickness of the metal film is 22 μm or less.

[0017] The present invention relates to a manufacturing method of a slider for a zipper. In the slider for the zipper, a main body of a body that is slidably mounted on a zipper tape is formed of iron or an iron alloy. The main body is immersed in a transparent film solution and dried to form a transparent film, and then a metal coating solution is sprayed to provide a metal film on the surface of the main body. Moreover, the transparent film can be formed after forming a base chemical conversion film on the surface of the main body.

[0018] Effects of the Invention

[0019] According to the slider for a zipper and the manufacturing method thereof of the present invention, the manufactured slider for a zipper is inexpensive, has a relatively thin film thickness, has a reliable rust prevention effect, and is beautiful in appearance. Moreover, it is formed by coating methods such as immersion and spraying, does not cost manufacturing costs, and does not require skill, so it can be manufactured inexpensively and simply. Description of the Drawings

[0020] Figure 1 It is a perspective view of a slider for a zipper according to an embodiment of the present invention.

[0021] Figure 2 is an exploded perspective view of the slider for a zipper according to the present embodiment.

[0022] Figure 3 is a top view of the slider for a zipper according to the present embodiment.

[0023] Figure 4 is Figure 3 a schematic enlarged cross-sectional view (a) taken along line A-A of

[0024] Figure 5 is Figure 4 a cross-sectional view taken along line B-B of

[0025] Figure 6 is Figure 3 a cross-sectional view taken along line C-C of

[0026] Figure 7 is a schematic diagram showing a manufacturing method of the slider for a zipper according to the present embodiment. Detailed Embodiment

[0027] Hereinafter, embodiments of the present invention will be described based on the drawings. Figures 1 to 7 To represent one embodiment of the present invention, the slider 10 for a zipper according to this embodiment includes an automatic stop mechanism, and the slider 10 for a zipper is composed of three members, namely a body 12, a leaf spring 14, and a pull tab 16, and these three members are assembled with each other.

[0028] The body 12 has a main body 13 made of iron or an iron alloy, and includes: an upper wing plate 18 and a lower wing plate 20, which are separated in the vertical direction, that is, the up-and-down direction, perpendicular to the plane of the top view shown in Figure 3 and are arranged parallel to each other; and guide columns 22, which connect the upper wing plate 18 and the lower wing plate 20 at the front end portions. Thus, left and right shoulder openings 24 separated by the guide columns 22 are formed at the front portion of the body 12, and a rear opening 26 is formed at the rear portion of the body 12. And, a substantially Y-shaped chain tooth guide path 28 that connects the left and right shoulder openings 24 and the rear opening 26 is formed between the upper wing plate 18 and the lower wing plate 20. On both side edges of the upper wing plate 18 and the lower wing plate 20 along the through direction of the chain tooth guide path 28, flanges 30, 32 for guiding a zipper chain tooth (not shown) are provided so as to be bent inward respectively.

[0029] A tab 34 protruding upward is provided at a position on the upper wing plate 18 that is slightly closer to the shoulder opening 24 relative to the center. At the central part of the top end of the tab 34, an engaging protrusion 36 protrudes toward the rear opening 26 side, and both sides of the engaging protrusion 36 become abutting portions 38. A through hole 40 communicating with the tooth guide path 28 is provided at a position on the upper wing plate 18 adjacent to the tab 34 and on the side closer to the rear opening 26. A support table 42 surrounding three sides of the through hole 40 is provided at the base of the tab 34. A hook-shaped tab 44 that tilts backward is provided at a position on the upper wing plate 18 close to the rear opening 26. The top end of the tab 44 is bent to form a locking portion 46. A claw hole 48 communicating with the tooth guide path 28 is provided at a position on the upper wing plate 18 adjacent to the tab 44 and on the side closer to the rear opening 26. In addition, a groove 50 that is long in the vertical direction is provided on the front surface of the guide post 22. On the inner peripheral surface of the groove 50, locking portions 52 having a substantially right-angled triangle shape with a lower horizontal part and an upper inclined part are formed on both the left and right sides.

[0030] As Figure 4 shown in (b) of, a zinc phosphate chemical conversion coating film 84 as a base chemical conversion coating film, a transparent coating film 90, and a metal coating film 96 are sequentially laminated and provided on the surface of the main body 13 of the carcass 12 formed of iron or an iron alloy, for rust prevention treatment and coloring. However, as Figure 5 , Figure 6 shown, a part of the inner peripheral surface of the tooth guide path 28 adjacent to the flanges 30, 32, and the guide post 22 becomes a long and thin shielding portion 28a, and the metal coating film 96 is not sufficiently provided on the shielding portion 28a, and the transparent coating film 90 is partially exposed. The total film thickness of each coating film on the surface of the carcass 12 is 23 μm or less, preferably 16 μm or less. The metal coating film 96 is 3 μm to 22 μm, preferably 6 μm to 12 μm, and the transparent coating film 90 is 0 to 4 μm, preferably 1 μm. If further required, a wax coating film 98 is formed on the outside of the metal coating film 96.

[0031] Here, each coating film will be described. The zinc phosphate chemical conversion coating film 84 is formed into an extremely thin coating film by chemical conversion treatment. This chemical conversion treatment is a pre-painting treatment for degreasing and primary rust prevention, and also improves the adhesion between the base material of the carcass 12 made of iron or an iron alloy and the transparent coating film 90. The base chemical conversion coating film formed by this chemical conversion treatment may also be a chemical conversion coating film other than the zinc phosphate chemical conversion coating film 84. For example, it may also be a ferric phosphate chemical conversion coating film, a manganese phosphate chemical conversion coating film, a zirconium-based chemical conversion coating film, etc. In addition, the chemical conversion coating film may not be provided according to circumstances.

[0032] In addition, the transparent coating film 90 is formed for reliable rust prevention. If rust, for example, occurs, it will affect the sliding of the body 12, making it difficult. Therefore, in order to improve the sliding property, it is necessary to form the transparent coating film 90 on the inner peripheral surface of the slider guide path 28 in particular. Moreover, the exposed parts of the chemical conversion coating films such as the zinc phosphate chemical conversion coating film 84 are affected by moisture in the air and start to corrode earlier. Therefore, it is preferable to cover the entire chemical conversion coating film such as the zinc phosphate chemical conversion coating film 84 with the transparent coating film 90 as soon as possible. The film thickness of the transparent coating film 90 on the inner peripheral surface of the slider guide path 28 is 1 μm to 6 μm, so the slider can slide without any obstacles. Particularly preferably, from the perspective of rust prevention, a transparent coating film 90 with a thickness of 2 μm or more is formed on the shielding part 28a. In addition, the film thickness of the transparent coating film 90 on the surface of the body 12 is 0 to 4 μm or less, so it does not affect the insertion of the leaf spring 14. When the film thickness is relatively thick, for example, the locking piece 58 of the leaf spring 14 does not completely enter the locking part 52 of the groove 50, and they cannot be correctly locked.

[0033] The metal coating film 96 on the surface layer is relatively thin. Therefore, if the transparent coating film 90 has a color, it will affect the tone of the metal coating film 96 when color unevenness occurs. Therefore, the transparent coating film 90 is made colorless. In addition, if the transparent coating film 90 is coated after the metal coating film 96, the vividness of the transparent coating film 90 remains and it is difficult to adjust the metal. Moreover, as described above, the chemical conversion coating film part is affected by moisture in the air and starts to corrode, but the metal coating film 96 cannot be coated as quickly as the transparent coating film 90. Therefore, the transparent coating film 90 needs to be coated first in such a way as to be the lower layer of the metal coating film 96.

[0034] The material of the transparent coating film 90 can be appropriately selected and used, such as epoxy melamine-based solvent type, epoxy urethane-based solvent type, acrylic melamine epoxy-based solvent type, polyester-based solvent type, acrylic urethane-based solvent type, nitrocellulose / alkyd-based solvent type, epoxy-based solvent type, alkyd / melamine-based solvent type, acrylic-styrene solvent type, nitrocellulose / alkyd-based solvent type, amino alkyd-based solvent type and other transparent resin materials, water-soluble transparent agents and other materials used in the past.

[0035] The metal coating film 96 is used for enhancing the appearance color and preventing rust on the surface, and has the desired color and metallic luster. Among them, the color of the appearance is, for example, gold, and aluminum particles are dispersed in the solvent, with metallic luster. If the metal coating film 96 is not sprayed, it is difficult to enhance the color. Although the outer side surface of the body 12 can be painted, it is impossible to uniformly paint the inner circumferential surface of the slider guide path 28. Although the shielding portion 28a of the slider guide path 28 cannot be metallically coated, it is exposed through the transparent coating film 90, and the sliding property is not impaired. The film thickness of the metal coating film 96 on the outer side surface of the main body 13 is 22 μm or less. Even if a coating film is formed in the through hole 40 and the claw hole 48 for inserting the leaf spring 14, there is no influence, and the leaf spring 14 can be reliably inserted and operated. The composition of the main material of the metal coating film 96 is the same as that of the material of the transparent coating film 90, and contains coloring agents, aluminum particles, etc., but the adhesiveness with the transparent coating film 90 is good. In addition, when the metal coating film is less than 3 μm, sometimes the desired color cannot be obtained due to the influence of the color of the base material.

[0036] The wax coating film 98 is used to improve the sliding property. The material is the same as that of general wax agents.

[0037] Next, based on Figure 7 The surface processing method of the body 12 will be described. First, the main body 13 made of iron or iron alloy is subjected to a base chemical conversion treatment, in which degreasing and primary rust prevention are carried out after degreasing. In the chemical conversion treatment, the main body 13 is placed in the cylinder 80, and the main body 13 is immersed in the zinc phosphate aqueous solution 82 and dried to perform zinc phosphate treatment, forming a base chemical conversion coating film 84 of the zinc phosphate chemical conversion coating film. After that, the main body 13 is moved to the cage 86, and the main body 13 is immersed in the transparent coating liquid 88 obtained by melting the material of the transparent coating film 90 and dried, and the transparent coating film 90 is formed on the surface of the zinc phosphate chemical conversion coating film 84. At this time, while rotating the cage 86, transparent coating is performed to remove the excess liquid, and the film thickness on the surface of the main body 13 becomes 0 to 4 μm. On the other hand, the inner circumferential surface of the slider guide path 28 does not remove the liquid like the surface of the main body 13, so there is more than 1 μm of the transparent coating film remaining, and a sufficient rust prevention effect can be ensured. Next, the main body 13 is moved to the coating cylinder 92, and the metal coating liquid 94 is sprayed to form the metal coating film 96 on the surface of the transparent coating film 90. At this time, the shielding portion 28a of the inner circumferential surface of the slider guide path 28 that is not fully reached by the metal coating liquid 94 and is shielded by the flanges 30, 32 and the guide post 22 forms a thinner metal coating film 96 or does not form, and the transparent coating film 90 is locally exposed. Further, a wax coating film 98 is formed on the surface of the metal coating film 96 and the exposed transparent coating film 90 as needed. This is carried out by moving the main body 13 to the cage 100 and immersing it in the wax liquid 102. Thus, the surface processing of the body 12 is completed.

[0038] Next, the components installed on the body 12 will be described. The leaf spring 14 is made of a material such as iron, stainless steel, or copper. The leaf spring 14 has a stop claw 54 at one end at the rear, a narrow drooping piece 56 at the other end at the front, and a laterally protruding locking piece 58 provided at the tip of the drooping piece 56. An opening 62 is provided in the central substrate 60 of the leaf spring 14, and a locking tongue piece 64 is provided which extends forward and bends downward from the rear edge of the opening 62. A through hole 66 is provided in the center of the locking tongue piece 64. A hooking hole 68 is provided in the part of the central substrate 60 close to the stop claw 54.

[0039] The pull tab 16 is made of iron or an iron alloy. A pivot 70 is provided at one end at the front, and a gripping part 72 that extends rearward for a long distance is provided at the other end at the rear, and a cam 74 is formed. In the cross-sectional shape of the pivot 70, the cam 74 is a rectangle that is long along the longitudinal direction of the gripping part 72. The surface of the pull tab 16 is painted in a color and gloss that approximate those of the body 12 by any method.

[0040] Next, the assembly of the slider 10 for the zipper will be described. After the surface of the body 12 is processed, the leaf spring 14 and the pull tab 16 are assembled to form the slider 10 for the zipper. First, on the upper wing plate 18 of the body 12, the pull tab 16 is placed in such a way that the cam 74 provided on the pivot 70 of the pull tab 16 is received between the tab 34 and the tab 44, and the leaf spring 14 is disposed on the pull tab 16. At this time, the stop claw 54 of the leaf spring 14 is inserted into the claw hole 48 of the upper wing plate 18, and the tab 44 is clearance-fitted with the hooking hole 68, and the edge of the hooking hole 68 is locked to the locking part 46 of the tab 44. In addition, the tab 34 of the body 12 is inserted into the opening 62 of the leaf spring 14, and the locking tongue piece 64 of the leaf spring 14 is inserted into the through hole 40 provided near the tab 34, and the engaging protrusion 36 of the tab 34 is inserted into the through hole 66 of the locking tongue piece 64. Thus, the side edge of the leaf spring 14 is placed on the support table 42 of the upper wing plate 18 in such a way that the surface of the locking tongue piece 64 is pressed against the abutting part 38 provided on the tab 34. Moreover, if the tip of the drooping piece 56 of the leaf spring 14 is guided along the slopes of the locking parts 52 on both sides of the groove 50 provided in the guide post 22 of the body 12 while pressing down the tip, then by the elasticity of the drooping piece 56, the locking piece 58 is engaged with the locking part 52 and is fixed. Thus, the assembly of the slider 10 for the zipper is completed.

[0041] Next, the method of using the zipper slider 10 is described. For the zipper slider 10, when the pull tab 16 is lying forward or backward of the body 12, the stop claw 54 of the leaf spring 14 is inserted into the claw hole 48 of the body 12 and protrudes toward the chain element guide path 28, inserted between the zipper elements of the zipper tape (not shown) passing through the chain element guide path 28, and stopped. When the zipper slider 10 is set to be slidable to open and close the zipper tape, the pull tab 16 is erected. Then, under the action of the cam 74 of the pull tab 16, the leaf spring 14 overcomes the elastic force and is lifted, and the stop claw 54 retreats from the chain element guide path 28 and releases the stop. As a result, the body 12 can slide freely, and the zipper tape can be opened and closed.

[0042] According to the zipper slider 10 of this embodiment, a carcass 12 with a coating can be provided, which is cheap, thin, has a reliable anti-rust effect, and has a beautiful appearance. The zinc phosphate chemical conversion coating 84, the transparent coating 90, and the metal coating 96 on the surface of the carcass 12 are all thin, and the size of the surface of the carcass 12 hardly changes, so the locking piece 58 of the leaf spring 14 is reliably engaged and fixed with the locking portion 52 of the carcass 12, and there is no assembly failure of the pull tab 16 and the leaf spring 14. The stop action and the stop release action based on the operation of the pull tab 16 can be smoothly performed, and there is no failure such as accidental disengagement of the assembly. In particular, the claw hole 48 of the stop claw 54 of the leaf spring 14 that protrudes and retracts does not become narrow, so it does not hinder the protruding and retracting action. The stop claw 54 is reliably inserted into the chain element guide path 28 and inserted between the zipper chain elements of the zipper tape, and can be stopped at any position of the zipper tape with a strong strength.

[0043] Furthermore, the zinc phosphate chemical conversion coating 84, the transparent coating 90, and the metal coating 96 can be manufactured simply by an inexpensive coating method such as dipping or spraying, without incurring manufacturing costs. There is no need for expensive plating treatment, and no need for large-scale plating equipment. The anti-rust effect is high, and even if the main body 13 of the carcass 12 is made of iron, it will not rust.

[0044] In addition, the zipper slider 10 of this embodiment presses the pull tab 16 against the leaf spring 14, and when the pull tab 16 is pulled up, the leaf spring 14 elastically deforms and releases the stop, but other methods are also possible. For example, the following structure can also be used: the pull tab can rotate freely, and when the pull tab is pulled, the leaf spring elastically deforms and releases the stop.

[0045] The zipper slider of the present invention is not limited to the above-mentioned embodiment, and the shape and number of each component can be appropriately changed. The leaf spring may not be provided. The shape of the pull tab may also be freely changed, and the pull tab may also be provided with a zinc phosphate chemical conversion coating, a transparent coating, and a metal coating in sequence.

[0046] Explanation of Reference Numerals

[0047] 10. Pull tab for zipper; 12. Body; 13. Main body; 14. Leaf spring; 16. Pull tab; 28. Tooth guide path; 28a. Shielding portion; 84. Zinc phosphate chemical conversion coating; 90. Transparent coating; 96. Metal coating.

Claims

1. A slider for a zipper, characterized in that in the slider for a zipper, a body (12) slidably mounted on a zipper tape is constituted by a main body (13) made of iron or an iron alloy. On the surface of the main body (13), a transparent coating film (90) and a metal coating film (96) are sequentially laminated and provided starting from the surface of the main body (13). The main material of the metal coating film (96) is a transparent resin material. A base chemical conversion coating film is provided between the main body (13) and the transparent coating film (90). The base chemical conversion coating film is a phosphate chemical conversion coating film (84) or a zirconium-based chemical conversion coating film. The phosphate of the phosphate chemical conversion coating film (84) is zinc phosphate, iron phosphate, or manganese phosphate.

2. The slider for a zipper according to claim 1, wherein the body (12) is provided with a tooth guiding path (28) through which the zipper tape passes in a predetermined direction. An occlusion part (28a) is provided on the inner peripheral surface of the tooth guiding path (28). At the occlusion part (28a), the metal coating film (96) is thinner than the metal coating film (96) on the surface of the body (12), or the metal coating film (96) is not provided, and at the occlusion part (28a), the transparent coating film (90) is partially exposed.

3. The slider for a zipper according to claim 1, wherein the total film thickness of the base chemical conversion coating film, the transparent coating film (90), and the metal coating film (96) is 23 μm or less.

4. The slider for a zipper according to claim 1, wherein the thickness of the transparent coating film (90) is 4 μm or less.

5. The slider for a zipper according to claim 1, wherein the thickness of the metal coating film (96) is 22 μm or less.

Images