Waterproof slide fastener

Abstract

A waterproof slide fastener where first and second through-holes are drilled in a tape side edge portion of a waterproof tape at specific intervals from one another, and first and second halves of a fastener element are integrally connected to each other through first through-holes. A stopper includes a body portion and an extension portion extending from the body portion. First and second halves of the stopper straddle a pair of waterproof tapes and are integrally connected to each other through second through-holes. According to the waterproof slide fastener, a manufacturing step thereof can be simplified, and it is possible to effectively prevent water from entering the waterproof slide fastener even if it receives a lateral pulling force.

Claims

1. A waterproof slide fastener including: a pair of fastener stringers in which a plurality of synthetic resin fastener elements is injection molded on opposed tape side edge portions of a pair of waterproof tapes provided at least one of tape surfaces with a waterproof layer; a slider slidably attached to an element row including the plurality of fastener elements; and a synthetic resin stopper placed on at least one of ends of the element row, in which the fastener elements includes a first element half placed on a first tape surface side of the waterproof tape and a second element half placed on a second tape surface side of the waterproof tape, and the first and second element halves are integrally connected to each other through first through-holes which are drilled in the tape side edge portion at predetermined intervals from each other, wherein each of the waterproof tapes includes at least one second through-hole drilled in a forming region of the stopper at the same intervals as those of the first through-holes, the stopper includes a body portion with which the slider comes into contact to stop the slider, and an extension portion extending from the body portion in a direction opposite from the element row along a tape length direction, the body portion and the extension portion are integrally molded with each other by injection molding, the body portion and the extension portion include a first half placed on the first tape surface side and a second half placed on the second tape surface side, the body portion and the extension portion are fixed such that the first half and the second half straddle the pair of waterproof tapes, and the first half and the second half are integrally connected to each other through the second through-hole, a thickness dimension of the extension portion is smaller than that of the body portion, the body portion and the extension portion are formed to hold the tape side edge portions of the waterproof tape, and the extension portion is formed up to an end edge of the waterproof tape.

2. The waterproof slide fastener according to claim 1, wherein a width dimension of the extension portion on the first tape surface side and the second tape surface side is set smaller than that of the body portion.

3. The waterproof slide fastener according to claim 1, wherein outer surfaces of both the side edge portions of the extension portion are formed into curved surfaces so that a thickness dimension of the extension portion is gradually reduced outward in a tape width direction.

4. The waterproof slide fastener according to claim 1, wherein a width of the extension portion is gradually increased toward an end edge of the waterproof tape.

5. The waterproof slide fastener according to claim 1, wherein the stopper is fixed to both ends of the element row.

6. The waterproof slide fastener according to claim 1, wherein the stopper is placed on an end of the element row on a side where the slider slides such that the element row closes, the body portion includes a slider insertion portion inserted into an element guide path of the slider, and the slider insertion portion includes a ridge portion which comes into intimate contact with inner surfaces of upper and lower blades of the slider.

7. The waterproof slide fastener according to claim 1, wherein the stopper is placed on an end of the element row on a side where the slider slides such that the element row separates, and a portion of the fastener element is embedded in the body portion.

8. The waterproof slide fastener according to claim 7, wherein a recess portion is formed in the body portion of the stopper such that the recess portion is cut from an upper bottom of the body portion in an extending direction of the extension portion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a front view showing a waterproof slide fastener according to a first embodiment of the invention.

(2) FIG. 2 is a back view of the waterproof slide fastener.

(3) FIG. 3 is an enlarged view of main portions showing a first stopper of the waterproof slide fastener.

(4) FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.

(5) FIG. 5 is a sectional view taken along line V-V in FIG. 3.

(6) FIG. 6 is an enlarged view of main portions showing a second stopper of the waterproof slide fastener.

(7) FIG. 7 is an enlarged view of main portions of a waterproof slide fastener according to a second embodiment of the invention.

(8) FIG. 8 is a front view showing a waterproof slide fastener according to a third embodiment of the invention.

(9) FIG. 9 is an enlarged view of main portions of the waterproof slide fastener.

(10) FIG. 10 is a front view showing a waterproof slide fastener according to a fourth embodiment of the invention.

(11) FIG. 11 is a front view showing a conventional waterproof slide fastener.

(12) FIG. 12 is a front side perspective view showing another conventional waterproof slide fastener.

(13) FIG. 13 is a back side perspective view of the waterproof slide fastener.

(14) FIG. 14 is an explanatory diagram showing a state before a first stopper of the waterproof slide fastener is formed.

MODES FOR CARRYING OUT THE INVENTION

(15) Preferred embodiments of the invention will be described in detail with reference to the drawings with specific embodiments. The invention is not limited to later-described embodiments, and the invention can variously be changed only if embodiments have substantially the same configuration and exert the same effects as those of the invention.

(16) In following embodiments, waterproof slide fasteners each having a stopper on both ends of an element row are described, but the invention includes a waterproof slide fastener in which the stopper is placed only on one of the ends of the element row. In the invention, it is only necessary that a fastener element is formed by injection molding synthetic resin, and a shape and a dimension of the fastener element can freely be changed.

(17) First Embodiment

(18) FIG. 1 is a front view showing a waterproof slide fastener according to a first embodiment, and FIG. 2 is a back view of the waterproof slide fastener. FIG. 3 is an enlarged view of main portions showing a first stopper of the waterproof slide fastener, and FIG. 6 is an enlarged view of main portions showing a second stopper of the waterproof slide fastener.

(19) As shown in FIG. 1, a waterproof slide fastener 1 according to the first embodiment is attached to an opening/closing portion or an opening 6a of a fastener-attached product 6 such as a wet suit. The waterproof slide fastener 1 has such waterproof property that when the waterproof slide fastener 1 is closed, liquid such as water does not leak inside from outside (or from inside to outside) of the fastener-attached product 6 through the waterproof slide fastener 1.

(20) In this case, the waterproof slide fastener 1 is attached to the fastener-attached product 6 by welding, by high-frequency wave, or by adhering, using adhesive, tape front surfaces (first tape surfaces) of later-described left and right waterproof tapes 11 onto or to a back surface side of a peripheral edge of the opening/closing portion of the fastener-attached product 6. Alternatively, it is also possible to sew the waterproof slide fastener 1 and the fastener-attached product 6 to each other by sewing. In the invention, it is also possible to sew the waterproof slide fastener 1 and the fastener-attached product 6 to each other by sewing after the waterproof slide fastener 1 is adhered to or welded onto the fastener-attached product 6.

(21) In the first embodiment, to enhance water-tightness between the waterproof slide fastener 1 and the fastener-attached product 6, waterproof adhesive tapes 7 (also called seam tapes) are adhered to back surface sides of the waterproof slide fastener 1 and the fastener-attached product 6 at upper, lower, left and right four locations such that the adhesive tapes 7 straddle the waterproof tapes 11 and the fastener-attached product 6 as shown in FIG. 2. A hole and a thread formed by sewing may be closed by the adhesive tapes 7.

(22) The waterproof slide fastener 1 of the first embodiment includes a pair of left and right fastener stringers 10 in which a plurality of synthetic resin fastener elements 12 is injection molded to opposed tape side edge portions of the waterproof tapes 11, a slider 8 slidably placed along element rows 13 including the plurality of fastener elements 12, a first stopper (lower stopper) 20 placed on lower end sides of the element rows 13, and a second stopper (upper stopper) 30 placed on upper end sides of the element rows 13.

(23) As shown in FIGS. 4 and 5, the waterproof tape 11 of each of the fastener stringers 10 in the first embodiment is configured by laminating a waterproof layer 11b made of polyurethane-based, polyester-based, polyamide-based or vinyl chloride-based thermoplastic elastomer (one polyester-based thermoplastic elastomer is commercially available as a trade name (Hytrel) provided from DU PONT-TORAY CO., LTD. for example) on a tape front surface (first tape surface) and a tape back surface (second tape surface) of a fastener tape 11a which is knitted or woven into a band shape.

(24) Since the waterproof layer 11b of the waterproof tape 11 is made of thermoplastic elastomer, it is possible to stably ensure waterproof property, to enhance flexibility of the waterproof tape 11 and to bend the waterproof tape 11 in a tape front and back direction and a tape width direction. Therefore, a handling operation of the waterproof slide fastener 1 becomes easy. When an entire surface of the fastener tape 11a is covered with thermoplastic elastomer, it is possible to easily attach the fastener tape 11a to the fastener-attached product 6 by high frequency welding.

(25) In the invention, it is also possible to provide the waterproof layer only on one of the tape surface (e.g., tape front surface) of the fastener tape to configure the waterproof tape, and it is also possible to configure the waterproof tape made of only elastomer waterproof layer by extruding and molding thermoplastic elastomer into a sheet shape.

(26) Each of the left and right waterproof tapes 11 includes a tape main body portion to which the fastener-attached product 6 is attached along the tape length direction, and a tape side edge portion (also called element attaching portion) placed on an inner side of the tape main body portion. As shown in FIG. 3, first through-holes 14a having sufficiently large holes through which molten resin material can pass in injection molding of the fastener element 12 and second through-holes 14b having sufficiently large holes through which molten resin material can pass in injection molding of the first and second stoppers 20 and 30 are continuously drilled in the tape side edge portions of the waterproof tapes 11. In this case, a forming distance between the first through-holes 14a, a forming distance between the second through-holes 14b, and a forming distance between the first through-hole 14a and the second through-hole 14b are set equal to each other.

(27) The first through-hole 14a and the second through-hole 14b are different from each other only in whether the through-hole is provided in a portion where the fastener element 12 (including fastener element 12 embedded in first stopper 20) is formed or the through-hole is provided in a portion where the first and second stoppers 20 and 30 are formed, and shapes, dimensions and formation distances between the first and second through-holes 14a and 14b are equal to each other. Therefore, in the waterproof tapes 11 before the fastener elements 12 and the first and second stoppers 20 and 30 are formed, there is no distinction between the first and second through-holes 14a and 14b, and the plurality of through-holes having the same shapes and the same dimensions are drilled at given intervals from one another.

(28) The fastener element 12 of the first embodiment has the same configuration as a fastener element which is placed on a general conventional waterproof slide fastener. More specifically, the fastener element 12 of the first embodiment is formed by injection molding thermoplastic resin such as polyacetal, polyamide, polypropylene, polybutylene terephthalate, nylon and polycarbonate.

(29) The fastener elements 12 includes a long circular coupling head 12a, a neck 12b which is continuously formed from the coupling head 12a and which has a constricted shape, a barrel 12c which is continuously formed from the neck 12b, a flat-shaped shoulder 12d which is vertically extending from the neck 12b and the barrel 12c, and legs 12e which branch and extend from a tape inner side end of the barrel 12c through a crotch. Further, a fitting recess portion into which the shoulder 12d of the fastener element 12 and a tape side edge portion of the waterproof tape 11 of a coupling mate member are fitted are recessed in a top (tip end) of the coupling head 12a.

(30) As shown in FIG. 4, each of the fastener elements 12 includes a first element half (front surface side element half) 15 placed on a tape front surface side and a second element half (back surface side element half) 16 placed on a tape back surface side, and the halves 15 and 16 are placed on both sides of the tape side edge portion of the waterproof tape 11. The first and second element halves 15 and 16 of the fastener element 12 have symmetric shapes with respect to the waterproof tape 11, they are fixed to the waterproof layers 11b of the waterproof tape 11, and they are integrally connected to each other through a connecting portion 17 which is formed in the first through-hole 14a drilled in the waterproof tape 11.

(31) The slider 8 of the first embodiment is made of synthetic resin or metal, and has the same configuration as that of a slider used for a general conventional waterproof slide fastener. More specifically, the slider 8 of the first embodiment has a stopping mechanism, and includes a slider body 8a, a locking pawl body (not shown) attached to the slider body 8a, and a tab (not shown) turnably held by the slider body 8a.

(32) In this case, the slider body 8a includes upper and lower blades, a diamond which connects the upper and lower blades to each other, flange portions placed on left and right side edge portions of the upper and lower blades, and a tab attaching post which stands on an upper surface side of the upper blade. A substantially Y-shaped element guide path is formed between the upper and lower blades. The locking pawl body includes a pawl placed on one end of the locking pawl body, and a biasing portion for making the pawl project into the element guide path. When the tab is not operated, the locking pawl body makes the pawl enter the element guide path to engage the pawl with the fastener element 12. The slider 8 of the invention may not include the locking pawl body.

(33) As shown in FIG. 3, the first stopper 20 (lower stopper) of the first embodiment is placed on a lower end of an element row 13 to define a lower end position of a sliding range of the slider 8. The first stopper 20 is formed by injection molding polyurethane-based, polyester-based, polyamide-based or vinyl chloride-based thermoplastic elastomer. The first stopper 20 includes a first stopper body portion 21 with which the slider 8 comes into contact to stop the first stopper 20, and a first extension portion 22 extending downward from the first stopper body portion 21.

(34) The first stopper body portion 21 and the first extension portion 22 of the first stopper 20 include a first half (front surface side half) 23 placed on the tape front surface side and a second half (back surface side half) 24 placed on the tape back surface side, and the first half 23 and the second half 24 are placed on both sides of the tape side edge portion of the waterproof tape 11.

(35) These first and second halves 23 and 24 straddle the left and right waterproof tapes 11, and have front and back symmetric shapes with respect to the waterproof tapes 11. The first and second halves 23 and 24 of the first stopper body portion 21 and the first extension portion 22 are fixed to the waterproof layers 11b of the waterproof tapes 11, and they are integrally connected to each other through a connecting portion 25 formed in the second through-hole 14b drilled in the waterproof tape 11.

(36) A thickness dimension in a tape front and back direction of the first stopper body portion 21 is greater than that of the fastener element 12, and has a trapezoidal shape as viewed from front and back. In this case, in the first stopper body portion 21, an upper bottom 21a on a side where the slider 8 comes into contact and a lower bottom 21b on a side of the first extension portion 22 are substantially parallel to each other, and a length of the lower bottom 21b is set shorter than that of the upper bottom 21a. Here, the thickness dimension is a dimension in a front and back direction of the fastener tape.

(37) Left and right vertices of the upper bottom 21a and left and right vertices of the upper bottom 21a [lower bottom 21b] are curved as if they are chamfered, and curvatures of the left and right vertices of the upper bottom 21a are greater than those of the left and right vertices of the lower bottom 21b (curving degrees of vertices of upper bottom 21a are stronger than those of vertices of lower bottom 21b).

(38) By making the curvatures of the left and right vertices of the upper bottom 21a greater in this manner, a longer length of the upper bottom 21a (dimension in tape width direction) can be secured. Therefore, it is possible to stably bring the slider 8 into contact with the upper bottom 21a of the first stopper body portion 21. By making the curvatures of the left and right vertices of the lower bottom 21b smaller, it becomes easy to disperse stress received by the left and right vertices of the lower bottom 21b when the waterproof slide fastener 1 is bent along the tape length direction or the tape width direction for example, and it is possible to prevent the lower bottom 21b of the first stopper body portion 21 from separating from the waterproof tape 11.

(39) The first stopper body portion 21 is configured by embedding a portion of the element row 13 including the fastener element 12 in a state where the left and right fastener elements 12 are coupled to each other. According to this, since the first stopper body portion 21 is formed continuously with the element row 13, water-tightness between the left and right waterproof tapes 11 between the element row 13 and the first stopper 20 is stably secured.

(40) The first extension portion 22 in the first stopper 20 has a constant dimension (width dimension) in the tape width direction along the tape length direction from the first stopper body portion 21 to a lower end edge of the waterproof tape 11.

(41) In this case, the first extension portion 22 extends from the left and right curved vertices (curved portions) placed on the side of the lower bottom 21b of the first stopper body portion 21, and a width dimension of the first extension portion 22 is set smaller than a distance (width dimension of first stopper body portion 21) between left and right sides 21c of the first stopper body portion 21.

(42) According to this, when the waterproof slide fastener 1 is attached to the fastener-attached product 6 of a wet suit or the like, if a position of an inner peripheral edge of the fastener-attached product 6 along the tape length direction is set at a position on a more outward side than the first stopper body portion 21 and at a position where no influence is exerted on sliding motion of the slider 8, it is possible to prevent the fastener-attached product 6 and the first extension portion 22 of the first stopper 20 from interfering with each other, and to stably attach the waterproof slide fastener 1.

(43) Dimensions (thickness dimensions) of the first and second halves 23 and 24 of the first extension portion 22 in the tape front and back direction are set smaller than thickness dimensions of the first and second halves 23 and 24 of the first stopper body portion 21. Further, thickness dimensions of the first and second halves 23 and 24 of the first extension portion 22 are set to constant values except later-described left and right curved side edge portions of the first extension portion 22.

(44) Since the first extension portion 22 has the above-described thickness dimension, flexibility of the first extension portion 22 is enhanced, and a difference in level formed between the first extension portion 22 and the waterproof tape 11 can be made smaller. Therefore, touching feeling of the waterproof slide fastener 1 can be enhanced. Furthermore, since the difference in level between the first extension portion 22 and the waterproof tape 11 becomes small, when the lower end of the waterproof slide fastener 1 is attached to the fastener-attached product 6, the fastener-attached product 6 can easily be made to extend along front surfaces of the waterproof tape 11 and the first extension portion 22. Therefore, a gap is less prone to be formed between the waterproof slide fastener 1 and the fastener-attached product 6, and it is possible to prevent water from entering the waterproof slide fastener through the gap.

(45) As shown in FIG. 5, outer surfaces (front and back surfaces) of left and right side edge portions (side edges in tape width direction) of the first and second halves 23 and 24 of the first extension portion 22 are curved and formed into curved surfaces so that a thickness dimension of the first extension portion 22 is gradually reduced outward of the tape width direction (outward from center where left and right waterproof tapes 11 come into intimate contact with each other). According to this, touching feeling of the first extension portion 22 is further enhanced, and when the lower end of the waterproof slide fastener 1 is attached to the fastener-attached product 6, a gap is less prone to be formed between the waterproof slide fastener 1 and the fastener-attached product 6. Shapes of the curved surfaces are not limited only if the thickness dimension of the first extension portion 22 is gradually reduced outward.

(46) As shown in FIG. 6, the second stopper 30 (upper stopper) of the first embodiment is placed on the upper end of the element row 13 to define the upper end position of the sliding range of the slider 8, and the second stopper 30 is formed by injection molding the same material as that of the first stopper 20. The second stopper 30 includes a second stopper body portion 31 with which the slider 8 comes into contact to stop the slider 8, and a second extension portion 32 extending upward from the second stopper body portion 31.

(47) The second stopper body portion 31 and the second extension portion 32 of the second stopper 30 include a first half (front surface side half) placed on the tape front surface side, and a second half (back surface side half) placed on the tape back surface side, the first and second halves straddle the left and right waterproof tapes 11, and have front and back symmetric shapes with respect to the waterproof tapes 11. The first and second halves of the second stopper body portion 31 and the second extension portion 32 are fixed to the waterproof layers 11b of the waterproof tapes 11, and are integrally connected to each other through a connecting portion drilled in the second through-hole 14b formed in the waterproof tape 11.

(48) The second stopper body portion 31 includes a slider contacting portion 31a placed on an upper end of the second stopper body portion 31 and with which upper and lower blades of the slider 8 come into contact, and a slider insertion portion 31b extending downward from the slider contacting portion 31a and inserted into the element guide path of the slider 8. The slider insertion portion 31b includes a ridge portion 31c projecting from an inner peripheral edge of the slider insertion portion 31b in a tape front and back direction.

(49) The slider contacting portion 31a straddles the left and right waterproof tapes 11, has a thickness dimension greater than that of the fastener element 12, and has a shape which is curved as viewed from front such that the slider contacting portion 31a extends along shoulder side outer edges of the upper and lower blades of the slider 8.

(50) A thickness dimension of the slider insertion portion 31b is smaller than that of the slider contacting portion 31a in the tape front and back direction so that the slider insertion portion 31b can be inserted into the element guide path of the slider 8, and the slider insertion portion 31b has a substantially C-shape as viewed from front. An accommodating portion 31d is formed on an inner peripheral side of the slider insertion portion 31b, and the diamond of the slider 8 can be accommodated in the accommodating portion 31d when the slider 8 is brought into contact with the slider contacting portion 31a.

(51) Further, when the slider 8 comes into contact with the slider contacting portion 31a, at least a portion of an outer peripheral side surface of the slider insertion portion 31b is made to come into contact with the flange portion of the slider 8, and tip ends 31e of the left and right element rows 13 in the slider insertion portion 31b are brought into intimate contact with each other.

(52) The ridge portion 31c of the second stopper body portion 31 is placed along an inner peripheral edge of the slider insertion portion 31b, and the ridge portion 31c has such a thickness dimension that the ridge portion 31c is in intimate contact with inner surfaces of the upper and lower blades of the slider 8 when the slider 8 comes into contact with the slider contacting portion 31a.

(53) Therefore, when the slider 8 which slides in a coupling direction of the element row 13 is brought into contact with the slider contacting portion 31a to stop the slider 8, the second stopper body portion 31 having the above-described configuration is brought into intimate contact with inner surfaces of the upper and lower blades of the slider 8 to surround the diamond of the slider 8 of the ridge portion 31c and the left and right tip ends 31e of the slider insertion portion 31b are brought into intimate contact with each other. According to this, water-tightness is secured between the second stopper body portion 31 and the slider 8. In the invention, the slider insertion portion 31b may not have the ridge portion 31c. In this case, the front and back surfaces of the slider insertion portion 31b may be brought into intimate contact with the upper and lower blades of the slider 8.

(54) The second extension portion 32 of the second stopper 30 has a constant width dimension along the tape length direction from the second stopper body portion 31 to an upper end edge of the waterproof tape 11. In this case, the width dimension of the second extension portion 32 is set smaller than that of the slider contacting portion 31a of the second stopper body portion 31. According to this, when the waterproof slide fastener 1 is attached to the fastener-attached product 6, it is possible to prevent the fastener-attached product 6 and the second extension portion 32 from interfering with each other, and to stably attach the waterproof slide fastener 1.

(55) Thickness dimensions of the of the first and second halves of the second extension portion 32 are set smaller than those of the first and second halves of the slider contacting portion 31a, and are set into constant values except later-described left and right curved side edge portions. According to this, flexibility of the second extension portion 32 is enhanced, and a difference in level between the second extension portion 32 and the waterproof tape 11 can be made small.

(56) Like the first extension portion 22 of the first stopper 20, outer surfaces (front and back surfaces) of the left and right side edge portions of the first and second halves of the second extension portion 32 are curved so that a thickness dimension of the second extension portion 32 is gradually reduced outward in the tape width direction.

(57) Next, a manufacturing method of the waterproof fastener of the first embodiment will be described.

(58) First, each of the waterproof tapes 11 is prepared. More specifically, the fastener tape 11a is knitted or woven, and films made of thermoplastic elastomer are superposed on both front and back surfaces of the obtained fastener tape 11a. In this state, the fastener tape 11a and the films are supplied to between a pair of heated rollers, and the films superposed on the front and back surfaces of the tape are welded onto the fastener tape 11a. According to this, the waterproof tape 11 having the waterproof layer 11b on the tape front surface and the tape back surface is obtained.

(59) Subsequently, a plurality of circular holes having predetermined dimensions is drilled in the tape side edge portion of the obtained waterproof tape 11 at predetermined intervals from one another along the tape length direction. At this time, the formed circular holes become the first through-holes 14a placed at forming locations of the fastener elements 12 and the second through-holes 14b placed at forming portions of the first and second stoppers 20 and 30. Further, a portion of the waterproof tape 11 where the circular hole is formed is notched to form a notch at a portion of the waterproof tape 11 where the second stopper 30 is formed, so that the accommodating portion 31d of the second stopper 30 can be formed.

(60) Obtained two of the waterproof tapes 11 are combined as one set, and thermoplastic resin material is injection molded onto the tape side edge portions of the waterproof tapes 11, thereby forming a plurality of fastener elements 12. At this time, the fastener elements 12 are fixed to positions of the circular holes (first through-holes 14a) drilled in the tape side edge portions of the waterproof tapes 11. According to this, a pair of left and right fastener stringers 10 having element rows 13 is configured.

(61) Next, the sliders 8 are attached to the element rows 13 of the pair of left and right fastener stringers 10 and then, thermoplastic elastomer is injection molded onto the upper and lower ends of the fastener stringers 10, thereby forming the first stopper 20 and the second stopper 30. At this time, the first stopper 20 and the second stopper 30 are formed such that the circular holes (second through-holes 14b) where the fastener elements 12 are not formed are covered. The first stopper 20 is formed such that a lower end of the element row 13 is embedded.

(62) According to this, the first extension portion 22 and the second extension portion 32 of the first stopper 20 and the second stopper 30 are formed up to the upper and lower ends of the waterproof tape 11. The waterproof tapes 11 at locations having the first stopper 20 and the second stopper 30 have the circular holes (second through-holes 14b) into which the connecting portions 25 of the first stopper 20 and the second stopper 30 are inserted.

(63) By carrying out the above-described steps, the waterproof slide fastener 1 of the first embodiment as shown in FIGS. 1 and 2 is manufactured. In the invention, it is also possible to separately carry out the forming steps of the first and second stoppers 20 and 30. When a long fastener chain is formed for example and the long fastener chain is cut to manufacture a plurality of waterproof slide fasteners 1 are manufactured, if the first and second stoppers 20 and 30 placed on adjacent waterproof slide fasteners 1 are simultaneously formed, it is also possible to form the respective first and second stoppers 20 and 30 and the respective first and second extension portions 22 and 32 by integrally forming the first extension portion 22 of the first stopper 20 and the second extension portion 32 of the second stopper 30 and then by cutting the first extension portion 22 and the second extension portion 32 in the tape width direction between the first stopper body portion 21 and the second stopper body portion 31. Timing and means for attaching the sliders 8 to the left and right element rows 13 are not especially limited.

(64) According to such a manufacturing step of the waterproof slide fastener 1, it is possible to continuously form the first and second through-holes 14a and 14b by one simple stamping operation of a tape. Hence, as compared with the manufacturing step of the waterproof slide fastener 1 in which a sheet member is pasted on the fastener tape 11a as in Patent Document 1, it is possible to simplify the manufacturing step of the waterproof slide fastener 1, and to enhance the productivity of the waterproof slide fastener 1.

(65) According to the waterproof slide fastener 1 of the first embodiment, the first and second stoppers 20 and 30 straddle the left and right waterproof tapes 11, and the first and second halves 23 and 24 of the respective stoppers are firmly fixed to the respective waterproof tapes 11 in the state where the first and second halves 23 and 24 are connected to each other through the second through-hole 14b of the waterproof tape 11.

(66) Therefore, in the regions where the first and second stoppers 20 and 30 are formed, it is possible to reliably prevent water from entering the tape back surface side from the tape front surface side (or entering tape front surface side from tape back surface side) from between the left and right waterproof tapes 11. Further, water does not enter the waterproof slide fastener from the second through-hole 14b drilled in the waterproof tape 11.

(67) Further, even if the waterproof slide fastener 1 receives a lateral pulling force which pulls the waterproof slide fastener 1 to separate in the tape width direction, since a groove or a crack is not generated in a boundary between the first and second stoppers 20 and 30 and the left and right waterproof tapes 11, it is possible to stably prevent water from entering the waterproof slide fastener or it does not seem in appearance that water enters the waterproof slide fastener.

(68) Further, since the first and second stoppers 20 and 30 of the first embodiment are fixed to the front and back surfaces of the waterproof tape 11 at the periphery of the second through-hole 14b, the fixing strength with respect to the waterproof tape 11 is high, and when the waterproof slide fastener 1 receives a lateral pulling force, it is possible to prevent the waterproof tape 11 from being cut from the second through-hole 14b.

(69) Although the second through-holes 14b are formed in both the forming region of the first stopper 20 and the forming region of the second stopper 30 in the first embodiment, the second through-hole 14b may be formed only in one of the forming regions of the first and second stoppers 20 and 30.

(70) Second Embodiment

(71) FIG. 7 is an enlarged view of main portions of a waterproof slide fastener according to a second embodiment.

(72) In the second embodiment and later-described embodiments 3 and 4, the first stopper is different from that of the first embodiment, and configurations of a waterproof slide fastener other than the first stopper are the same as those of the first embodiment.

(73) A first stopper 40 in a waterproof slide fastener 2 of the second embodiment includes a first stopper body portion 41 and a first extension portion 42 extending downward from the first stopper body portion 41, and the first stopper body portion 41 and the first extension portion 42 straddle left and right waterproof tapes 11. Each of the first stopper body portion 41 and the first extension portion 42 includes a first half placed on a tape front surface side and a second half placed on a tape back surface side. The first and second halves are fixed to a waterproof layers 11b of the waterproof tapes 11, and are integrally connected to each other through a connecting portion which is drilled in a second through-hole 14b formed in the waterproof tape 11.

(74) A plurality of circular recess portions 46 are formed in front and back surfaces of the first stopper body portion 41 and the first extension portion 42. In this case, each of the recess portions 46 formed in the first stopper body portion 41 is formed up to a depth at a position of a front or back surface of a fastener element 12 which is embedded in the first stopper body portion 41. Each of the recess portions 46 formed in the first extension portion 42 is formed up to a depth at a position of a front or back surface of the waterproof tape 11.

(75) The recess portion 46 is a trace of a pin-holding formed by holding, by means of a pin, the fastener element 12 and the waterproof tape 11 which are embedded in the first stopper body portion 41 in a cavity space of a forming mold when the first stopper 40 is injection molded.

(76) By holding the fastener element 12 and the waterproof tape 11 by means of the pin when the first stopper 40 is injection molded, it is possible to form the first stopper 40 in a state where positions of the fastener element 12 and the waterproof tape 11 are stabilized. Therefore, when the first stopper 40 is injection molded, the position of the fastener element 12 is not misaligned or the waterproof tape 11 does not flip, and the first stopper 40 can firmly be formed at a predetermined position with respect to the waterproof tape 11 and the fastener element 12. Hence, it is possible to prevent a portion of the fastener element 12 or a portion of the waterproof tape 11 from appearing from front and back surfaces of the first stopper 40, and to stably secure the fixing strength of the first stopper 40 with respect to the waterproof tape 11.

(77) The waterproof slide fastener 2 of the second embodiment is configured in the same manner as that of the waterproof slide fastener 1 of the first embodiment except that the first stopper 40 is provided with the recess portions 46. Therefore, it is possible to obtain the same effects as those of the waterproof slide fastener 1 of the first embodiment.

(78) Third Embodiment

(79) FIG. 8 is a front view showing a portion of a waterproof slide fastener according to a third embodiment, and FIG. 9 is an enlarged view of main portions of the waterproof slide fastener.

(80) A first stopper 50 in a waterproof slide fastener 3 of the third embodiment includes a first stopper body portion 51 and a first extension portion 52 extending downward from the first stopper body portion 51, and the first stopper body portion 51 and the first extension portion 52 straddle left and right waterproof tapes 11. In this case, a recess portion 56 is formed such that it is cut from an upper bottom 51a in first and second halves of the first stopper body portion 51 toward an extending direction (downward) of the first extension portion 52. The recess portion 56 of the first stopper body portion 51 is a trace formed by a projecting portion which projects from a cavity surface side of a mold for preventing molten resin from leaking when the first stopper 50 is injection molded.

(81) More specifically, the fitting recess portion is recessed in a vertex of the coupling head 12a of the fastener element 12 as described above. Hence, when the first stopper 20 according to the first embodiment is injection molded for example, if a molding mold is fastened from tape front and back directions in the injection molding step, the fitting recess portion of the fastener element 12 having a portion which is embedded in the first stopper 20 and a portion which appears outside becomes a gap from which molten resin flows out (leaks), and there is a problem that molten resin leaks from the gap when molten resin is injected into the cavity of the mold.

(82) To solve such a problem, in the third embodiment, a projecting portion for preventing leakage of molten resin projects from a predetermined portion of the cavity surface side in the mold for molding the first stopper 50 so that the gap from which molten resin leaks becomes small (or gap is not formed) by the fitting recess portion of the fastener element 12. As shown in FIG. 9, it is preferable that the projecting portion for preventing leakage of molten resin is in contact with a front surface of a shoulder 12d of the fastener element 12. By suppressing leakage of molten resin when the first stopper 50 is injection molded in this manner, since the first stopper 50 having a predetermined shape is stably formed, visual quality and quality of appearance of the waterproof slide fastener 3 are excellent.

(83) Fourth Embodiment

(84) FIG. 10 is a front view showing a portion of a waterproof slide fastener according to a fourth embodiment.

(85) A first stopper 60 in the waterproof slide fastener 4 of the fourth embodiment includes a first stopper body portion 61 and a first extension portion 62 extending downward from the first stopper body portion 61, and the first stopper body portion 61 and the first extension portion 62 straddle left and right waterproof tapes 11. In this case, the first stopper body portion 61 of the fourth embodiment is configured in the same manner as that of the first stopper body portion 21 in the first embodiment.

(86) The first extension portion 62 of the fourth embodiment is formed from the first stopper body portion 61 toward a lower end edge of the waterproof tape 11 along a tape length direction. A first half placed on a tape front surface side and a second half placed on a tape back surface side of the first extension portion 62 are fixed to waterproof layers 11b of the waterproof tapes 11 respectively, and integrally connected to each other through a connecting portion drilled in a second through-hole 14b formed in the waterproof tape 11.

(87) Outer surfaces of left and right side edge portions of the first and second halves of the first extension portion 62 are curved so that a thickness dimension of the first extension portion 62 is gradually reduced outward in a tape width direction. Further, a width dimension of the first extension portion 62 is gradually increased toward a lower end edge of the waterproof tape 11, and width dimensions of left and right side edge portions whose outer surfaces are curved are gradually increased downward. In this case, a width dimension W1 of a widest lower end edge of the first extension portion 62 is set smaller than a width dimension W2 of a widest portion (portion close to upper bottom) of the first stopper body portion 61.

(88) The width dimension of the first extension portion 62 of the fourth embodiment is gradually increased downward as described above. Therefore, the more the first extension portion 62 separates from the first stopper body portion 61, the smoother the outer surfaces of both the side edge portions of the extension portion become (inclination becomes more gentle). Hence, when a waterproof slide fastener 4 of the fourth embodiment is adhered to or welded onto a fastener-attached product 6, it becomes more difficult to form a gap between the waterproof slide fastener 4 and the fastener-attached product 6, and it is possible to more stably prevent water from entering the waterproof slide fastener 4 from this gap.

DESCRIPTION OF REFERENCE NUMERALS

(89) 1, 2, 3, 4 waterproof slide fastener 6 fastener-attached product 6a opening 7 adhesive tape 8 slider 8a slider body 10 fastener stringer 11 waterproof tape 11a fastener tape 11b waterproof layer 12 fastener element 12a coupling head 12b neck 12c barrel 12d shoulder 12e leg 13 element row 14a first through-hole 14b second through-hole 15 first element half (front surface side element half) 16 second element half (back surface side element half) 17 connecting portion 20 first stopper (lower stopper) 21 first stopper body portion 21a upper bottom 21b lower bottom 21c side 22 first extension portion 23 first half (front surface side half) 24 second half (back surface side half) 25 connecting portion 30 second stopper (upper stopper) 31 second stopper body portion 31a slider contacting portion 31b slider insertion portion 31c ridge portion 31d accommodating portion 31e tip end 32 second extension portion 40 first stopper 41 first stopper body portion 42 first extension portion 46 recess portion 50 first stopper 51 first stopper body portion 51a upper bottom 52 first extension portion 56 recess portion 60 first stopper 61 first stopper body portion 62 first extension portion W1, W2 width dimension