TW202339639A - Slide fastener - Google Patents

Abstract

Each of left and right fastener elements (9, 10) includes first and second fastening sections (22m, 22n) provided so as to be stacked in a fastener-element thickness direction. The first fastening sections (22m) of the left and right fastener elements (9, 10) are engageable with each other, and the second fastening sections (22n) of the left and right fastener elements (9, 10) are engageable with each other. The first and second fastening sections (22m, 22n) have different shapes and are positioned such that one of the first and second fastening sections (22m, 22n) is at least partially offset relative to the other in the front-rear direction. Each of the left and right fastener elements (9, 10) further includes contact surfaces (91, 92) provided in at least a part of a differential region corresponding to the difference in shape and the difference in position between the first and second fastening sections (22m, 22n).

Description

Zipper

This disclosure is about a zipper.

As seen in Patent Document 1 and Patent Document 2, fastener elements suitable for reducing the sliding resistance of the slider are known. Patent Document 1 discloses an inverted V-shaped zipper element (see FIG. 1 of Patent Document 1), a subtype thereof (see FIG. 10 of Patent Document 1), and an upper half of a zipper element configured as Covered part (see Figure 37 of Patent Document 1). In addition, this covering part does not function as a fastening part.

Patent Document 3 discloses that in order to provide the slide fastener with water-stopping properties, the fastener elements are overlapped (see FIG. 4 of Patent Document 3). Paragraphs 0071 to 0073 and 0092 of Patent Document 3 disclose that the front end of the element head comes into contact with the core portion of the waterproof tape on the counterpart side to improve the water-stopping property. [Prior art documents] [Patent Document]

Patent Document 1: Japanese Patent No. 6891272 Patent Document 2: China Design Announcement No. 305137693S Patent Document 3: International Publication No. 2014/002234

[Problem to be solved by the invention] The inventor of this application has newly discovered the significance of coexisting the water-stopping property of a zipper with other properties. [Means to solve the problem]

The zipper involved in one aspect of the present disclosure includes: a left zipper chain, which has a plurality of left zipper elements installed on the side edge of the left zipper; and a right zipper, which has a plurality of right zipper elements. It is installed on the side edge of the right zipper tape; and the slider is used to engage the left zipper element and the right zipper element staggeredly with each other and move in the front and rear direction. The left zipper element and the right zipper element respectively include a first fastening part and a second fastening part that are stacked in the thickness direction of the zipper element. The first fastening parts of the left zipper element and the right zipper element are mutually exclusive. The second fastening parts of the left zipper element and the right zipper element can be engaged with each other. The first fastening part and the second fastening part have different shapes, and the first fastening part and the second fastening part are able to engage with each other. One of the two fastening parts is positioned in a manner that is at least partially offset in the front-to-back direction relative to the other. Each of the left zipper element and the right zipper element further includes a contact surface provided in at least a part of the differential area corresponding to the shape difference and position difference of the first fastening part and the second fastening part.

In some embodiments, in each of the left zipper element and the right zipper element, the first fastener element is set to be demarcated by the continuity of the center points of the width of at least a part of the first fastening part in the front-rear direction. When the plane and the second plane defined by the continuity of the center point of the width of at least a part of the second fastening part in the front-rear direction, one of the first fastening part and the second fastening part is One is positioned in a manner that is at least partially offset relative to the other, so that the distance between the first plane and the second plane in the front-to-back direction changes in the left-right direction.

In some embodiments, the first fastening portion of each of the left zipper element and the right zipper element includes a tapered engaging convex portion and a tapered recess in the same direction as the protruding direction of the engaging convex portion. The engaging recess.

In some embodiments, the second fastening portion of each of the left zipper element and the right zipper element includes a neck and a head connected to the neck. Depending on the situation, the neck is thinner than the head.

In some embodiments, the second fastening part is shaped symmetrically with respect to a plane orthogonal to the front-rear direction, and/or the second fastening part is formed in a manner that at least partially covers the engaging recess of the first fastening part. settings. Optionally, the first fastening part is thicker than the second fastening part.

In some embodiments, the heads of the left zipper elements have flat tapered surfaces that approach each other as they extend toward the outside of the left zipper tape on which the left zipper element is mounted. The head portions of the right side fastener element have flat tapered surfaces that approach each other as they extend toward the outer side of the right side fastener tape to which the right side fastener element is attached.

In some embodiments, the top point of the engaging convex portion and the bottom point of the engaging recessed portion are positioned on an axis that defines the moving direction of the slider.

In some embodiments, the left zipper element and the right zipper element respectively include additional contact surfaces included in the differential area. When the left zipper element and the right zipper element are engaged, the left zipper element The additional contact surface is in contact with the side edge of the right zipper tape, and the additional contact surface of the right zipper element is in contact with the side edge of the left zipper tape.

In some embodiments, one of the first fastening portion and the second fastening portion includes a protrusion that protrudes further outward of the belt than the other of the first fastening portion and the second fastening portion, The protruding portion is provided with a curved surface suitable for contacting the side edge portion.

In some embodiments, the protruding portion of one of the first fastening portion and the second fastening portion is shaped to have a thin-walled end portion closer to the front end side than the curved surface. In some embodiments, a gate mark is formed on the protruding portion of one of the first fastening part and the second fastening part.

In some embodiments, the left zipper element and the right zipper element respectively include: a first base portion having a bonding surface coupled with a first fastening portion; and a second base portion having a bonding surface coupled with a second fastening portion. The coupling surface of the second base is positioned further outside the belt than the coupling surface of the first base, and the side edge portion is exposed further outside the belt than the coupling surface of the first base.

In some embodiments, the first fastening part is configured as one of the upper part of the zipper element and the lower part of the zipper element, and the second fastening part is configured as the other one of the upper part of the zipper element and the lower part of the zipper element. .

In some embodiments, the first fastening part is suitable for reducing the sliding resistance of the slider, and the second fastening part is suitable for improving the transverse pulling strength of the slide fastener. In some embodiments, the first fastening part and the second fastening part are respectively configured to enable the slide fastener to have a first transverse tensile strength and a second transverse tensile strength. [Effects of the invention]

According to one aspect of the present disclosure, the coexistence of water-stopping properties and other characteristics of the zipper is promoted.

Various embodiments and features will be described below with reference to FIGS. 1 to 18 . Those skilled in the art can combine each embodiment and/or each feature without excessive explanation, and can also understand the synergistic effect brought about by such combination. In principle, overlapping descriptions between embodiments are omitted. The drawings are referred to for the main purpose of describing the invention and are simplified for convenience of drawing. Each feature is not only valid for the zipper disclosed in this application, but can be understood as a general feature that is also common in various other zippers not disclosed in this specification.

In this specification, the front-to-back direction is consistent with the moving direction of the slider, the left-to-right direction is orthogonal to the front-to-back direction, and is parallel to the tape surface of the zipper tape. The up-down direction is orthogonal to both the front-rear direction and the left-right direction. These directions can be redefined in different ways according to the description below. For simple explanation, expressions such as "left side", "right side", "front side", "rear side", "upper side", and "lower side" may be omitted.

The slide fastener 1 according to the example of the present disclosure is a long belt-shaped member extending in the front-rear direction with a predetermined left and right width as shown in FIG. 1. Specifically, it has a pair of left and right zipper stringers 2, Zipper chain strap 3, and slider 4. Each of the fastener stringers 2 and 3 has a fastener tape 5 and a fastener tape 6, and a plurality of fastener elements 9 and 10 attached to the side edge portions 7 and 8 of the fastener tape 5 and the fastener tape 6. The slider 4 is used to engage and move the left fastener element 9 and the right fastener element 10 in a staggered manner. The slide fastener 1 has left and right front stops 11, 12, and one rear stop 13, all of which can be omitted. Furthermore, the rear stop 13 can be configured as an opening piece.

The zipper tape 5 and the zipper tape 6 are long tape bodies extending in the front-rear direction with a predetermined left-right width. The zipper tape 5 and the zipper tape 6 have a thickness defined by a pair of upper and lower tape surfaces, and have high flexibility due to their thin thickness. The zipper tape 5 and the zipper tape 6 include a base fabric that is woven or knitted or mixed with a knitted fabric, and optionally have a waterproof layer (for example, a resin layer) overlaid on the base fabric. When the zipper tape 5 and the zipper tape 6 include a waterproof layer, the waterproof layer prevents liquid from penetrating in the direction penetrating the zipper tape 5 and the zipper tape 6 .

The zipper elements 9 and 10 are attached to the side edge portions 7 and 8 of the zipper tape 5 and the zipper tape 6 at predetermined intervals (for example, core portions that bulge up and down from the tape surface), thereby A row of elements is formed that extends in the front-to-back direction. The fastener elements 9 and 10 are made of resin and are typically fixed to the side edge portions 7 and 8 (for example, the core portion) of the fastener tape 5 and the fastener tape 6 by injection molding. As will be understood from the description below, the zipper element 9 and the zipper element 10 can be configured to ensure an element row (in an engaged state) formed by the interlaced engagement of the zipper element 9 and the zipper element 10 25 Partial or complete water stop.

The slider 4 can be made of metal, resin or ceramics. Typically, as shown in FIGS. 1 , 9 , and 10 , the slider 4 has an upper wing 41 and a lower wing 42 . The upper wing 41 and the lower wing 42 are attached to the front ends of these. The connected connecting column 43, a pair of left and right upper flanges 44 protruding downward from the left and right side edges of the upper wing plate 41, and a pair of left and right lower flanges 45 protruding upward from the left and right side edges of the lower wing plate 42 are provided on The pull tab attachment part 46 on the upper surface of the upper wing panel 41, and the pull tab 47 passed through the handle attachment part 46 and provided on the upper wing panel 41.

By pulling the pull tab 47 forward, the slider 4 advances, and the left and right zipper stringers 2 and 3 are engaged (that is, the zipper 1 is closed). By pulling the pull tab 47 backward, the slider 4 retreats, and the engagement of the left and right zipper stringers 2 and 3 is released (that is, the zipper 1 is opened). Furthermore, in the illustrated example, the center line CX of the slide fastener 1 is equal to the axis defining the movement direction of the slider 4 .

The slider 4 is provided with a Y-shaped element passage. Specifically, at the front end of the slider 4, front openings are provided on the left and right sides of the connecting post 43, and through these front openings, the (unengaged) left and right zipper elements 9 and 10 are pulled by themselves. The inside of the head moves to the outside or from the outside to the inside. A rear opening is provided at the rear end of the slider 4. Through the rear opening, the left and right zipper elements 9 and 10 (in the engaged state) move from the inside to the outside of the slider or from the outside to the inside. The left and right zipper elements 9 and 10 are engaged or disengaged at the position between the connecting post 43 and the rear opening.

As shown in FIG. 2 , each zipper element 9 , 10 has a base 21 fixed to the zipper tape 5 , the side edge portion 7 of the zipper tape 6 , the side edge portion 8 , and a fastener protruding from the base 21 toward the outside of the tape. Solid part 22. In addition, in this specification, the tape outer side refers to the direction from the position on the tape surface to the position outside the tape surface across the side edge part to which the fastener element is attached with respect to the zipper tape to which the fastener element is attached. In FIG. 2 , the fastening portion 22 of the left zipper element 9 protrudes to the right, and the fastening portion 22 of the right zipper element 10 protrudes to the left. Furthermore, Figure 2 shows the opposite side of Figure 1, so please note that the left and right sides are reversed.

As can be seen from the comparison of FIGS. 1 and 2 , the zipper elements 9 and 10 are configured to have different shapes on the upper and lower sides, thereby promoting the coexistence of water-stopping properties and other characteristics of the zipper 1 . This aspect will be described in more detail with reference to FIGS. 3 to 7 . Furthermore, the left and right zipper elements 9 and 10 have a mirror-symmetrical structure. Therefore, no distinction will be made between the two. That is, the description related to one of the fastener element 9 and the fastener element 10 is also common to the other one.

As shown in Figure 3, the base 21 of the zipper element 10 includes a first base 21m and a second base 21n, which are fixed on different belt surfaces of the zipper tape 6, and the zipper tape is sandwiched between them. 6 and side edge portion 8 (for example, core wire). The fastening part 22 of the fastener element 10 includes the 1st fastening part 22m and the 2nd fastening part 22n. In each zipper element 10, the first fastening part 22m and the second fastening part 22n have different shapes. Furthermore, between the first fastening part 22m and the second fastening part 22n, one of them is at least partially offset from the other in the front-rear direction. The first fastening part 22m protrudes toward the outside of the belt from the first base part 21m, and the second fastening part 22n projects toward the outside of the belt from the second base part 21n. The 1st fastening part 22m and the 2nd fastening part 22n are provided laminated|stacked in the up-down direction (zipper element thickness direction), and the fastener tape 6 is not arrange|positioned between them.

When the left and right zipper elements 9 and 10 are engaged, the first fastening portions 22m of the left and right zipper elements 9 and 10 are engaged with each other. The second fastening parts 22n are engaged with each other. The slide fastener 1 and the first fastening portion 22m have a first transverse tensile strength corresponding to their engagement with each other, and have a second transverse tensile strength corresponding to the engagement of the second fastening portions 22n with each other. That is, the lateral tensile strength of the slide fastener 1 is equivalent to the sum of the first lateral tensile strength and the second lateral tensile strength. The first transverse tensile strength and the second transverse tensile strength may be different. Thereby, the transverse tensile strength based on the other fastening part can be used to make up for the lack of transverse tensile strength based on the other fastening part.

The first base part 21m and the second base part 21n have a main surface 31 and an outer peripheral surface 32 respectively. The main surface 31 is substantially parallel to the tape surface of the fastener tape 6 and has a substantially rectangular shape. Of course, the main surface may be inclined or may have other shapes. The outer peripheral surface 32 of the first base part 21m includes a coupling surface 33m to which the first fastening part 22m is coupled. The outer peripheral surface 32 of the second base part 21n includes a coupling surface 33n to which the second fastening part 22n is coupled. Either joint surface 33m or joint surface 33n is a surface facing the outside of the belt, and the front and rear width is larger than the upper and lower width.

The coupling surface 33n is positioned farther outside the belt than the coupling surface 33m, and the side edge portion 8 is exposed at a position farther outside the belt than the coupling surface 33m. Thereby, as will be clear from the description below, the side edge portion of one of the left and right fastener elements can come into contact with the other of the left and right fastener tapes, and the water-stopping property of the slide fastener 1 can be improved. Furthermore, the coupling surface 33n may be located outside the tape surface of the zipper tape 6 . The bonding surface 33m may be located on the tape surface (eg, side edge portion) of the fastener tape 6 .

FIG. 4 is a schematic top view of the fastener element 10 . FIG. 5 is a schematic top view of the fastener element 10, and in order to illustrate the first fastening part 22m, the outline of the second fastening part 22n is shown with a dotted line. FIG. 6 is a schematic bottom view of the fastener element 10 .

The first fastening part 22m is provided at the lower part of the fastening part 22 (as the lower part of the zipper element), and the second fastening part 22n is provided at the upper part of the fastening part 22 (as the upper part of the zipper element). The first fastening part 22m may have a shape bent at one location like an inverted V-shape or a "へ"-shape. Additionally or alternatively, the first fastening part 22m may have an engaging convex part 61 and an engaging recessed part 62 recessed in the same direction as the protruding direction of the engaging convex part 61. Typically, the engaging convex portion 61 is arranged on the front side and the engaging recessed portion 62 is arranged on the rear side, but the opposite arrangement is also possible. Furthermore, please note that the first fastening portion can adopt various shapes other than those shown in the figure.

The engaging convex portion 61 has two inclined surfaces 51 and 52 as a front surface, and is defined by these to have a tapered shape protruding forward. Similarly, the engaging recessed portion 62 has two inclined surfaces 54 and 55 as rear surfaces, and is defined by these to have a tapered shape that is concave forward. The apex 53 of the engaging convex portion 61 is provided between the two inclined surfaces 51 and 52 , and similarly, the bottom point 56 of the engaging recessed portion 62 is provided between the two inclined surfaces 54 and 55 . The front inclined surface 51 and the rear inclined surface 54 may be aligned substantially or at least partially in parallel. Likewise, the front inclined surface 52 and the rear inclined surface 55 may be aligned substantially or at least partially parallel. Although a curved surface is formed for chamfering between the inclined surface 51 and the inclined surface 52, the extension line of the inclined surface 51 and the extension line of the inclined surface 52 may have an angle of 120° or more (for example, in the range of 120° to 140°). angle) cross. The same applies to the inclined surface 54 and the inclined surface 55 . The vertex 53 may be the vertex of the curved surface between the inclined surface 51 and the inclined surface 52 . Similarly, the bottom point 56 may be the bottom point of the curved surface between the inclined surfaces 54 and 55 . The top point 53 and the bottom point 56 can be positioned on the center line CX of the slide fastener 1 (ie, the axis that defines the movement direction of the slider 4). Thereby, the sliding resistance of the slider 4 is reduced, and smooth and sufficient engagement of the left and right first fastening parts 22m can be promoted.

Furthermore, the first fastening part 22m has a connection front end surface 57 extending in the front-rear direction and connecting the inclined surface 54 and the inclined surface 51 . Between the connecting front end surface 57 and the inclined surface 54, a rear corner portion 58 shaped to protrude rearward is formed at an acute angle. The front corner 59 is formed into an obtuse angle between the connecting front end surface 57 and the inclined surface 51 . The total of the angle formed by connecting the front end surface 57 and the inclined surface 54 (acute angle) and the angle formed by connecting the front end surface 57 and the inclined surface 51 (obtuse angle) may be 180°. Furthermore, the chamfer is ignored when determining the angle.

The first fastening part 22m includes a first rod part 63 and a second rod part 64 in order away from the first base part 21m (see FIG. 6 ). The first fastening part 22m has the inclined surface 52 as the front surface of the first rod part 63, and has the inclined surface 55 as the rear surface. In addition, the first fastening part 22m has the inclined surface 51 as the front surface of the second rod part 64, and has the inclined surface 54 as the rear surface. The first rod part 63 and the second rod part 64 may intersect at an angle of 120° or more (for example, an angle in the range of 120° to 140°). The inclined surfaces 51 , 52 , 54 , and 55 of the first rod portion 63 and the second rod portion 64 can be specified with respect to the center line CX of the slide fastener 1 (that is, the axis that defines the moving direction of the slider 4 ). cross at the same angle.

The first fastening part 22m may have a protrusion or a recessed part added to the basic shape that is bent at one location, as disclosed in Patent Document 1 (which is incorporated by reference into this specification). Among them, such additional protrusions are omitted, and the first fastening part 22m is shaped as shown in the figure. This simplifies the structure of the first fastening part 22m, and the mold for injection molding is also simplified, which can facilitate Cost reduction.

The second fastening part 22n has a different shape from the first fastening part 22m. The second fastening part 22n includes a neck portion 71 and a head portion 72 connected to the neck portion 71 . The neck portion 71 is coupled to the second base portion 21n and extends from the second base portion 21n toward the outside of the belt. The head part 72 is coupled to the second base part 21n via the neck part 71. The neck 71 has a substantially rectangular upper surface, and is typically shaped into a rectangular parallelepiped shape. The neck portion 71 may have a portion that is widened in the front-rear direction for coupling with the head portion 72 and/or a portion that is widened in the front-rear direction for coupling with the second base portion 21n. The head 72 also has a substantially rectangular upper surface like the neck 71, and is typically shaped into a rectangular parallelepiped shape. In the example of FIG. 4 , the head 72 is chamfered into an arc shape at two front corners and rear corners away from the neck 71 . The neck 71 and the head 72 can be changed into other shapes.

In some cases, the second fastening portion 22n has a shape that is symmetrical about a plane orthogonal to the front-rear direction. When a horizontal pulling force is applied to the zipper elements 9 and 10 in the engaged state, such as an inverted V shape or a "へ" shape of the first fastening portion 22m, which is bent at one location, the zipper The fastener element may rotate and disengage, but by shaping the second fastening part 22n as described above, the rotation of the fastener element is suppressed. In addition, the length of the neck 71 and the head 72 in the front-rear direction is shorter than the length of the second base 21n in the front-rear direction. In other words, the neck portion 71 and the head portion 72 are accommodated within the maximum width of the second base portion 21n in the front-rear direction. This reduces the possibility that the left and right second fastening portions 22n will collide (for example, strongly or strongly) when they are engaged with each other.

The head 72 is longer than the neck 71 in the front-rear direction, and therefore has a front end 72p protruding forward than the neck 71 and a rear end 72q protruding rearwardly relative to the neck 71 . As a result, a recessed portion 71p for accommodating the rear end of the second fastening portion of the front engaging partner is formed between the front end 72p of the head portion 72 and the second base portion 21n. Similarly, a recessed portion 71q for accommodating the front end of the second fastening portion of the rear engaging partner is formed between the rear end 72q of the head portion 72 and the second base portion 21n.

The width W3 in the front-rear direction of the neck 71 is 2 times or less the width W4 in the left-right direction, and is preferably in the range of 1.5 times to 1.9 times. The width W1 in the front-rear direction of the head 72 is more than twice the width W2 in the left-right direction, and is preferably in the range of 2.2 times to 2.9 times. Furthermore, the condition W3<W1 is satisfied, and optionally the condition W2<W4 is further satisfied.

The second fastening part 22n may be provided so as to be at least partially offset rearward relative to the first fastening part 22m. Specifically, the front surfaces of the neck 71 and the head 72 are located further rearward than the apex 53 (or the inclined surface 51 or the inclined surface 52 ) of the engaging convex portion 61 . The rear surface is located further back than the bottom point 56 (or the inclined surface 54 or the inclined surface 55 ) of the engaging recess 62 . The engaging recessed portion 62 can be covered by the rear portion of the neck portion 71 and the rear portion of the head portion 72 (see FIG. 5 ). The front end 72p of the head 72 can be positioned so as to be offset from the apex 53 to the rear and to the outside of the zipper tape 6, and the rear end 72q of the head 72 can be positioned to be offset to the rear from the bottom point 56 and to the outside of the zipper tape 6. method to set the location. Furthermore, the rear corner portion 58 of the first fastening portion 22m may be positioned further rearward than the front end 72p of the head 72 and forward than the rear end 72q of the head 72 in the front-rear direction. square position.

The at least partial offset in the front-rear direction between the first fastening part 22m and the second fastening part 22n will be further described. As shown in FIGS. 4 and 5 , a plane CP1 orthogonal to the front-rear direction is set with respect to the center of the width W21 of the first base portion 21 m and the second base portion 21 n in the front-rear direction (in addition, the first base portion 21 m and the second base portion 21 n are The second base 21n is shaped symmetrically about the plane CP1). The second fastening portion 22n may be shaped symmetrically with respect to the plane CP1. In this case, all center points of the width of the second fastening portion 22n in the front-rear direction are included in the plane CP1. That is, all the center points of the width W3 of the neck 71 are included in the plane CP1, and all the center points of the width W1 of the head 72 are included in the plane CP1. In other words, the plane CP1 is also a plane defined by the continuity of the center points of the width of the second fastening portion 22n in the front-rear direction or a plane including the plane region.

In the form in which the second fastening part 22n is shaped symmetrically with respect to the plane CP1, the first fastening part 22m is not shaped symmetrically with respect to the plane CP1. In addition, the first fastening part 22m may be positioned in a manner that is offset relative to the second fastening part 22n at least partially in the front-rear direction. As a result, certain center points of the width of the first fastening portion 22m in the front-rear direction can be positioned in an offset manner from the plane CP1.

Detailed description will be given with reference to FIG. 5 . In addition to setting plane CP1, plane CP2 is also set. The plane CP2 is a plane parallel to the plane CP1 and is a plane including the center point between the apex 53 of the engaging convex portion 61 and the bottom point 56 of the engaging recessed portion 62 in the front-rear direction (in addition, the engaging convex portion 61 The apex 53 and the bottom point 56 of the engaging recess 62 are arranged on a common plane parallel to the front-rear direction). The center point P9 of the width of the first fastening portion 22m in the front-rear direction is set so as to draw a trajectory that is inclined toward the outside of the fastener tape from point a on the plane CP1 in the figure toward point b on the plane CP2. A trajectory that moves forward and then moves diagonally rearward from point b on plane CP2 toward point c on plane CP1 (specifically, an inverted V-shaped trajectory). The plane CP3 is delimited by the continuity of the center point P9 between point a and point b. The plane CP4 is defined by the continuity of the center point P9 between point b and point c.

In some cases, including FIG. 5 , one of the first fastening portion 22m and the second fastening portion 22n is positioned in a manner that is at least partially offset relative to the other in the front-rear direction, so that The distance in the front-rear direction between the plane CP3 and the plane CP1 is changed in the left-right direction (in the illustrated example, it increases toward the outside of the belt). Additionally or alternatively, one of the first fastening portion 22m and the second fastening portion 22n is positioned in a manner that is at least partially offset in the front-rear direction relative to the other, so that the plane CP4 and the plane CP1 The interval in the front-to-back direction changes in the left-to-right direction (decreases toward the outside of the belt). By satisfying any one or both of the relationships, the offset amount between the first fastening part 22m and the second fastening part 22n can be sufficiently ensured. Furthermore, the change in the distance between the plane CP3 and the plane CP1 is continuous, and this aspect also applies to the relationship between the plane CP4 and the plane CP1. As an option, either or both planes CP3 and CP4 may intersect plane CP1 (or a plane including plane CP1 as a partial region). Thereby, the first fastening part 22m and the second fastening part 22n can be integrated with each other while ensuring a sufficient offset amount.

The distance between the plane CP1 and the plane CP2 may be more than 1/4 of the (certain or average, maximum or minimum) width W22m of the first fastening portion 22m in the front-rear direction, and within a range of less than 1/2 thereof. By setting the distance between the plane CP1 and the plane CP2 in this way, ensuring a sufficient offset amount between the first fastening part 22m and the second fastening part 22n is promoted.

The thickness of the first fastening part 22m and the second fastening part 22n can be set arbitrarily. By making the first fastening part 22m thicker than the second fastening part 22n, characteristics (for example, the sliding resistance of the slider and/or the sliding resistance of the slide fastener 1) according to the mutual engagement of the left and right first fastening parts 22m can be achieved. The horizontal tensile strength) is more dominant than the corresponding characteristics (for example, the sliding resistance of the slider and/or the horizontal tensile strength of the slide fastener 1) corresponding to the engagement of the left and right second fastening portions 22n. vice versa.

In the illustrated example, the first fastening part 22m is suitable for reducing the sliding resistance of the slider 4, and the second fastening part 22n is suitable for increasing the lateral tensile strength of the slide fastener 1. By making the first fastening part 22m thicker than the second fastening part 22n (for example, 1.1 times to 1.4 times), it is possible to preferentially promote the reduction of the sliding resistance of the slider 4 and ensure the desired horizontal pull of the slide fastener 1 intensity. As shown in Figure 7, the first fastening part 22m has a first (maximum) thickness T1, the second fastening part 22n has a second (maximum) thickness T2, and satisfies T1>T2, and it is suitable to satisfy (1.1 ･T2)＜T1＜(1.4･T2). The second thickness T2 of the second fastening portion 22n is equal to the thickness of the head portion 72 .

The thickness of the neck 71 in the vertical direction is formed to be thinner than that of the head 72 so that when the left and right second fastening portions 22n are engaged, the front and rear adjacent zipper elements 9 and the zipper 1 are bent when the slide fastener 1 is bent in the front and rear directions. The situation where the fastener elements 10 collide with each other more strongly is suppressed (see FIG. 8 ). Specifically, the main surface 71a of the neck 71 is provided closer to the plane PL1 related to the zipper tape 6 (in addition, the plane PL1 is set at the center of the thickness of the zipper tape) than the main surface 72a of the head 72 position, and a thickness difference D1 is formed between the main surface 71a and the main surface 72a. The main surface 72a of the head 72 and the main surface 31 of the second base 21n may be arranged at the same height (ie, the same plane aligned parallel to the plane PL1). A recessed portion in which the main surface 71a of the neck portion 71 becomes the bottom surface is formed between the head portion 72 and the first base portion 21m.

The first fastening part 22m has a protruding part 81 protruding toward the outside of the belt than the second fastening part 22n. The protruding portion 81 is formed with a curved surface 82 suitable for contacting the side edge portion 7 of the fastener tape 5 . Furthermore, the protruding portion 81 may be shaped so as to have a thin-walled end portion 83 at a position closer to the front end side than the curved surface 82 . The upper surface 84 of the thin-walled end portion 83 is located further outside the belt than the curved surface 82 and forms an edge together with the front end surface 85 of the protruding portion 81 (and the thin-walled end portion 83).

As shown in FIG. 7 , planes PL2 to PL4 orthogonal to the left-right direction are set. The plane PL2 includes the front end point or the front end surface of the front end surface 72b of the head 72. PL3 includes the front end point or front end surface of the curved surface 82 . PL4 includes the front end point or front end surface of the protruding portion 81 (and the thin-walled end portion 83). The distance between plane PL2 and plane PL3 is larger than the distance between plane PL3 and plane PL4. This means that the left and right width of the curved surface 82 is larger than the left and right width of the upper surface 84. The thickness T3 of the protrusion 81 gradually decreases toward the outside of the belt due to the upper curved surface 82 and the lower curved surface 86 .

The curved surface 82 may be formed so as to intersect the plane PL1 with respect to the fastener tape 6 . This promotes more reliable contact between the curved surface 82 and the fastener tape 5 with which it is in contact. The curved surface 82 is located closer to the fastener tape 6 side than the front end surface 85 of the protruding portion 81 , thereby forming a thin end portion 83 . The reason for providing the thin-walled end portion 83 may be optimization of gate cutting. For example, immediately after injection molding, the gate is connected to the front end surface 85 of the protrusion 81 , and the upper surface of the gate and the upper surface of the thin-walled end portion 83 are at the same level. The gate cutter cuts the gate from the first fastening part 22m side. The movement distance of the gate cutter is shortened by thinning the protruding portion 81 , thereby promoting optimization of gate cutting (for example, increasing the efficiency of gate cutting or extending the life of the cutter). In addition, the formation of the curved surface 82 is promoted by providing the thin-walled end portion 83 . Furthermore, gate marks may be formed on the front end surface 85 of the protruding portion 81 . Depending on the gate position and the entry position of the gate cutter, the protrusion 81 may be provided in the second fastening part 22n instead of the first fastening part 22m. In this case, the same description as above is also applicable, and therefore is omitted. Repeat instructions.

In this embodiment, each of the left and right fastener elements 9 and 10 includes at least a part of a contact provided in a differential region corresponding to the shape difference and positional difference between the first fastening part 22m and the second fastening part 22n. Surface 91, contact surface 92. As shown in FIGS. 4 and 5 , the first fastening part 22m has a contact surface 91 provided in a range further forward than the second fastening part 22n. The contact surface 91 is provided to cross or be orthogonal to the thickness direction of the fastener element, and is oriented to face upward. As shown in FIG. 6 , the second fastening part 22n has a contact surface 92 provided in a range further back than the first fastening part 22m. The contact surface 92 is provided crosswise or orthogonally to the zipper element thickness direction, and is oriented so as to face downward. When the left and right zipper elements 9 and 10 are engaged, the contact surfaces 91 and 92 of the left and right zipper elements 9 and 10 are close to or in contact with each other, thereby obtaining corresponding water-stopping properties. This promotes the coexistence of the water-stopping property of the slide fastener 1 and other characteristics (for example, the sliding resistance of the slide fastener 4 and the lateral tensile strength of the slide fastener 1).

As shown in FIGS. 9 and 10 , as the slider 4 advances, the left and right fastener elements 9 and 10 enter the slider 4 from the left and right front openings of the slider 4 . The left and right zipper elements 9 and 10 start to engage between the connecting post 43 and the rear opening, and then complete the engagement. Specifically, in the left and right fastener elements 9 and 10, the first fastening parts 22m are engaged with each other, and the second fastening parts 22n are engaged with each other. When these fastening parts are engaged, the contact surfaces 91 and 92 of the left and right fastener elements 9 and 10 approach or contact each other.

In FIGS. 9 and 10 , if attention is paid to the zipper elements assigned with symbols 9g and 9h, and the zipper elements assigned with symbol 10i, the contact surface 91 (see FIG. 9 ) of the element 10i and the element 9g The contact surface 92 (refer to Figure 10) is close to or in contact with each other, that is, the two surfaces overlap. The contact surface 92 (refer to FIG. 10 ) of the fastener element 10i and the contact surface 91 (refer to FIG. 9 ) of the fastener element 9h are close to or in contact with each other, that is, both surfaces overlap. Between the front and rear adjacent pairs of fastener elements to be staggeredly engaged with each other, the contact surface 91 (facing upward) and the contact surface 92 (facing downward) are close to or in contact with each other. Thereby, the gap between the fastener elements becomes extremely small, and the flow path of the liquid (for example, water) is blocked.

In the difference area corresponding to the shape difference and position difference between the first fastening part 22m and the second fastening part 22n, in addition to including the contact surface 91, the first fastening part 22m may also include a part in a position higher than the second fastening part 22m. In terms of the solid portion 22n, there is an additional contact surface 93 in the range further outside the belt. Furthermore, since the first fastening part 22m protrudes further outside the belt than the second fastening part 22n, the first fastening part 22m includes an additional contact surface 93. The additional contact surface 93 may include a curved surface 82 as shown in the illustrated example. Furthermore, it is also conceivable that the additional contact surface 93 is not provided with the curved surface 82 and the contact surface 93 is a flat surface or an inclined surface. When the left and right zipper elements 9 and 10 are engaged, as shown in FIG. 11 , the contact surface 93 (curved surface 82 ) of the zipper element 9 comes into contact with the side of the zipper tape 6 on which the zipper element 10 is mounted. The edges 8 (for example, core wires) are in contact. In addition, the second base portion 21 n of the fastener element 10 of the engaging partner is located above the contact surface 93 (curved surface 82 ) of the fastener element 9 . At this time, the contact surface 93 (curved surface 82 ) of the fastener element 9 is in contact with the side edge portion 8 of the fastener tape 6 to which the fastener element 10 is attached, and is close to or in contact with the second base portion 21 n of the fastener element 10 . Thereby, the gap produced between the fastener element and the fastener tape 5 and the fastener tape 6 becomes very small, and the flow path of the liquid (for example, water) is blocked.

FIG. 12 is a cross-section showing an element array in which the fastener elements 9 and 10 are engaged with each other. It is shown that the contact surface 91 (facing upward) and the contact surface 92 (facing downward) in the fastener elements adjacent in the front-rear direction are close to or in contact with each other. Furthermore, it is also possible to consider a form in which the flow path of the liquid is not completely blocked by the approach or contact of the contact surface 91 and the contact surface 92 . For example, assume that liquid flows between the contact surface 91 and the contact surface 92 due to capillary action. Even in this case, compared with the form in which the contact surfaces 91 and 92 are not provided, the liquid is suppressed from flowing from the upper side to the lower side so as to penetrate the slide fastener 1 according to the provision of the contact surfaces 91 and 92 . . The flow path of liquid with high viscosity is blocked, but the flow path of liquid with low viscosity is not blocked.

In the example of FIG. 12 , the first fastening part 22m has a front part 65 and a rear part 66 that is thicker than the front part 65, and is formed with a wall surface 67 facing forward. In the state in which the zipper elements 9 and 10 are engaged with each other, when the slide fastener 1 is buckled in the front-rear direction, the situation in which the front-rear adjacent zipper elements 9 and 10 collide more strongly with each other is suppressed. That is, in FIG. 12, the rear part 66 of the fastener element 9 and the front part 65 of the fastener element 10 are formed in the step shape, and the collision of the 1st fastening parts 22m is suppressed.

Fig. 13 is a schematic top view of another example of a fastener element. As shown in FIG. 13 , a raised portion 96 is provided on the contact surface 91 of the fastener element 10 . Furthermore, the raised portion 96 may be provided in the entire difference region between the first fastening portion 22m and the second fastening portion 22n. This form is shown in FIG. 4 . There is a space between the contact surface 92 of the zipper element 9 and the zipper element 10 and the contact surface 91 of the zipper element 10 and the zipper element 9 facing it, and the raised portion 96 of the zipper element 10 partially fills this space. . Compared with the embodiment shown in FIG. 12 , a larger space is formed, the degree of collision between the zipper elements 9 and 10 during engagement is reduced, and the sliding resistance of the slider 4 is suppressed. Furthermore, even in the embodiment shown in FIG. 12 , since the peripheral surface of the portion corresponding to the raised portion 96 becomes a curved surface, the collision of the fastener elements 9 and 10 during engagement is suppressed. . As shown in FIG. 14 , a complementary concave storage portion 99 that accommodates the raised portion 96 may be formed on the contact surface 92 of the fastener element 9 . According to this additional engagement or fitting, the bonding between the fastener elements 9 and 10 can be improved.

Fig. 15 is a schematic top view of another example of a fastener element. As shown in FIG. 15 , it is also assumed that the second fastening part 22n includes a portion protruding toward the outside of the belt than the first fastening part 22m, that is, the second fastening part 22n is provided with the protruding part 81 form. The various features described above can also be applied to this form (overlapping explanations are omitted).

Fig. 16 is a schematic top view of yet another example of a fastener element. As shown in FIG. 16 , flat tapered surfaces 73 and 74 that approach each other as they extend toward the outside of the belt can be formed on the head portion 72 of the second fastening portion 22n. An intermediate surface 75 is formed between the tapered surfaces 73 and 74 and preferably extends flatly in the front-rear direction. Furthermore, the shoulder surfaces 76 and 77 of the fastener element 10 correspond to the tapered surfaces 73 and 74 and are formed into tapered surfaces that approach each other as they extend toward the outside of the tape. When a plane PP2 parallel to the plane PP1 on which the tapered surface 73 exists is set, the shoulder surface 76 has an area extending along the plane PP2 or included in the plane PP2. The same relationship applies to the tapered surface 74 and the shoulder surface 77 .

According to the above structure, when the left and right zipper elements 9 and 10 are engaged as shown in FIG. 17 , compared with the embodiment involving the shape of the zipper element shown in FIG. 4 , it is easy to reduce the cost. Small the gap between the zipper element 9 and the zipper element 10, and easily reduce the gap between the zipper element 9 and the zipper tape 6 (Similarly, it is easy to reduce the gap between the zipper element 10 and the zipper tape 5 the gap between them). In addition, as shown in FIG. 18 , the collision between the left and right zipper elements 9 and the head 72 of the second fastening portion 22n of the zipper element 10 in the slider 4 can be avoided or reduced. . Thereby, with respect to the engagement of the left and right fastener elements 9 and the second fastening portions 22n of the fastener elements 10 with each other, the force required to slide the slider 4 can be reduced.

Based on the above disclosure, those skilled in the art can make various changes to each embodiment. The symbols added to the patent application scope are for reference only and should not be used for the purpose of limiting the interpretation of the patent application scope.

1: Zipper 2, 3: Left zipper chain/right zipper chain/zipper chain 4: Pull the head 5, 6: Left zipper tape/right zipper tape/zipper tape 7, 8: Side edge 9, 10: Left zipper element and right zipper element/zipper element 9g: chain teeth 9h: chain teeth 10i: chain teeth 11, 12: Front stopper 13:Rear stop piece 21:Base 21m: first base 21n: second base 22: Fastening part 22m, 22n: first fastening part and second fastening part 25:Chain teeth row 31: Main surface 32: Outer peripheral surface 33m, 33n: joint surface 41:Upper wing panel 42:Lower wing panel 43:Connecting pillar 44:Upper flange 45:Lower flange 46: Pull tab installation part 47: pull tab 51, 52: Inclined surface 53:Vertex 54, 55: Inclined surface 56: Low point 57:Front face 58: Rear corner 59: Front corner 61: Engagement convex part 62: Engagement recess 63:The first club 64:The second club 65:Front 66:Rear 67: Wall 71: Neck 71a: Main surface 71p: concave part 71q: concave part 72:Head 72a: Main surface 72b: Front end face 72p: front end 72q:Backend 73, 74: cone surface 75:middle surface 76, 77: Shoulder surface 81:Protrusion 82: Curved surface 83:Thin-walled end 84: Upper surface 85:Front face 86: Curved surface 91, 92: Contact surface 93:Additional contact surface/contact surface 96: bulge 99: Concave storage part a, b, c: points CP1: Plane/second plane CP2: Plane CP3, CP4: plane/first plane CX: Centerline/Axis D1: Thickness difference P9: Center point PL1, PL2, PL3, PL4: plane PP1, PP2: plane T1: First (maximum) thickness/thickness T2: Second (maximum) thickness/thickness T3:Thickness W1, W2, W3, W4, W21, W22m: Width X-X, XI-XI: dotted line

FIG. 1 is an elevation view of a slide fastener according to one aspect of the present disclosure, showing its upper surface. FIG. 2 is a schematic partial bottom view of the slide fastener, showing a state in which left and right fastener elements are engaged with each other alternately. Fig. 3 is a schematic perspective view of the fastener element attached to the side edge portion of the fastener tape. Fig. 4 is a schematic top view of the fastener element. 5 is a schematic top view of the fastener element, and in order to illustrate the first fastening part, the outline of the second fastening part is shown with a dotted line. Fig. 6 is a schematic bottom view of the fastener element. FIG. 7 is a cross-sectional view of the fastener stringer and illustrates the side surface of the fastener stringer. Fig. 8 is a schematic perspective view showing how the degree of collision between left and right fastener elements is reduced by a thin neck portion. FIG. 9 is a schematic diagram showing a process in which the second fastening portions of the left and right fastener elements in the slider are engaged with each other. FIG. 10 is a schematic diagram showing a process in which the first fastening portions of the left and right fastener elements in the slider are engaged with each other. FIG. 11 is a schematic cross-sectional view of the slide fastener taken along the dashed-dotted line X-X extending in the slide fastener width direction of FIG. 1 . FIG. 12 is a schematic cross-sectional view of the element row in the engaged state along the dotted line XI-XI parallel to the slide fastener center line in FIG. 1 . Fig. 13 is a schematic top view of another example of a fastener element. FIG. 14 is a schematic diagram showing the engagement state of the fastener elements shown in FIG. 13 . Fig. 15 is a schematic top view of another example of a fastener element. Fig. 16 is a schematic top view of yet another example of a fastener element. FIG. 17 is a schematic diagram showing the engagement state of the fastener elements shown in FIG. 16 and the engagement state of the fastener element and the fastener tape. FIG. 18 is a schematic diagram showing a process in which the fastener element shown in FIG. 16 is engaged in the slider.

9, 10: Left zipper element and right zipper element/zipper element

9g: chain teeth

9h: chain teeth

10i: chain teeth

22m, 22n: first fastening part and second fastening part

42:Lower wing panel

43:Connecting pillar

45:Lower flange

71: Neck

72:Head

91:Contact surface

Claims (18)

A zipper is a zipper (1), and the zipper (1) includes: The left zipper chain tape (2) is formed by installing a plurality of left zipper chain elements (9) on the side edge of the left zipper chain (5); The right zipper fastener tape (3) is formed by installing a plurality of right zipper fastener elements (10) on the side edge of the right zipper fastener tape (6); and The slider (4) is used to engage the left zipper element and the right zipper element (9, 10) in a staggered manner and to be movable in the front and rear direction, and The left zipper element and the right zipper element (9, 10) respectively include a first fastening part and a second fastening part (22m, 22n) that are stacked in the thickness direction of the zipper element. The left zipper element The fastener elements and the first fastening part (22m) of the right zipper element (9, 10) can engage with each other, and the second fastening part of the left zipper element and the right zipper element (9, 10) (22n) can engage with each other, the first fastening part and the second fastening part (22m, 22n) have different shapes, and the first fastening part and the second fastening part (22m, 22n) are 22n) one of which is positioned relative to the other in a manner that is at least partially offset in said front-to-back direction, The left zipper element and the right zipper element (9, 10) each further include a differential region provided corresponding to the shape difference and position difference of the first fastening part and the second fastening part (22m, 22n). at least part of the contact surface (91, 92). The zipper according to claim 1, wherein in each of the left zipper element and the right zipper element (9, 10), at least a part of the first fastening portion (22m) is set. The first plane (CP3, CP4) that is continuous and defined by the center point of the width in the front-rear direction, and the center of the width in the front-rear direction through at least a part of the second fastening portion (22n) When the second plane (CP1) is defined by the continuous points, one of the first fastening parts and the second fastening parts (22m, 22n) is at least partially offset relative to the other. Positioned in such a manner that the distance in the front-rear direction between the first plane (CP3, CP4) and the second plane (CP1) changes in the left-right direction. The zipper according to claim 1 or claim 2, wherein the first fastening portion (22m) of each of the left zipper element and the right zipper element (9, 10) includes a tapered engaging protrusion. portion (61), and an engaging recessed portion (62) that is tapered in the same direction as the protruding direction of the engaging convex portion (61). The zipper according to claim 3, wherein the second fastening part (22n) of each of the left zipper element and the right zipper element (9, 10) includes a neck (71) and a The neck (71) is connected to the head (72). The slide fastener according to claim 4, wherein the second fastening portion (22n) is shaped symmetrically with respect to a plane (CP1) orthogonal to the front-rear direction. The slide fastener according to claim 4 or claim 5, wherein the second fastening part (22n) is provided in a manner to at least partially cover the engaging recessed part (62) of the first fastening part (22m). . The zipper according to any one of claims 4 to 6, wherein the first fastening part (22m) is thicker than the second fastening part (22n). The zipper according to any one of claims 4 to 7, wherein the neck (71) is thinner than the head (72). The zipper according to any one of claims 4 to 8, wherein the head (72) of the left zipper element (9) has the left zipper element (9) installed along the direction. The flat tapered surfaces (73, 74) extending from the outside of the left side zipper tape (5) and approaching each other, The head portion (72) of the right zipper element (10) has flat surfaces that approach each other as they extend toward the outer side of the right zipper tape (6) on which the right zipper element (10) is mounted. The cone surface (73, 74). The zipper according to any one of claims 3 to 9, wherein the apex (53) of the engaging convex portion (61) and the bottom point (56) of the engaging recessed portion (62) are positioned at On the axis (CX) that specifies the movement direction of the slider (4). The zipper according to any one of claims 1 to 10, wherein the left zipper element and the right zipper element (9, 10) respectively include additional contact surfaces (93) contained in the differential area. ), when the left zipper element and the right zipper element (9, 10) are engaged, the additional contact surface (93) of the left zipper element (9) and the right zipper tape (6) The side edge portion is in contact, and the additional contact surface (93) of the right zipper element (10) is in contact with the side edge portion of the left zipper tape (5). The zipper according to any one of claims 1 to 11, wherein one of the first fastening part and the second fastening part (22m, 22n) includes a The other of the second fastening parts (22m, 22n) has a protruding part (81) that protrudes toward the outside of the belt. The protruding part (81) is provided with a protruding part (81) suitable for contacting the side edge part. curved surface (82). The slide fastener according to claim 12, wherein the protruding portion (81) of one of the first fastening portion and the second fastening portion (22m, 22n) is smaller than the curved surface (82). The position closer to the front end side is shaped in such a way that a thin-walled end portion (83) is provided. The slide fastener according to claim 12 or 13, wherein a gate mark is formed on the protruding portion (81) of one of the first fastening portion and the second fastening portion (22m, 22n). The zipper according to any one of claims 1 to 14, wherein the left zipper element and the right zipper element (9, 10) respectively include: a first base (21m), with the A coupling surface (33m) of the fastening part (22m); and a second base part (21n), having a coupling surface (33n) combined with the second fastening part (22n), the second base part (21n) The coupling surface (33n) is positioned further outside the belt than the coupling surface (33m) of the first base (21m), and the side edge portion is located farther than the first base (21m). (21m) of the joint surface (33m) is exposed closer to the outside of the belt. The slide fastener according to any one of claims 1 to 15, wherein the first fastening part (22m) is provided as one of an upper part of a zipper element and a lower part of a zipper element, and the second fastening part (22m) is The solid part (22n) is provided as the other one of a fastener element upper part and a fastener element lower part. The zipper according to any one of claims 1 to 16, wherein the first fastening part (22m) is adapted to reduce the sliding resistance of the slider (4), The second fastening part (22n) is suitable for improving the transverse tensile strength of the slide fastener (1). The slide fastener according to any one of claims 1 to 17, wherein the first fastening part and the second fastening part (22m, 22n) are respectively configured to make the slide fastener (1) have a third The first transverse tensile strength and the second transverse tensile strength.