Opening and closing insert

Abstract

The present invention provides a release and insertion device that, when the butterfly bar and box bar are formed to correspond to a slider equipped with a stopping mechanism, makes it difficult for the butterfly bar to get caught on the claw portion of the slider when inserting the butterfly bar into the slider, even if a different type of slider with a different structure of the stopping mechanism is used for the butterfly bar and box bar. [Solution] The opening and closing insert (1,2) of the present invention comprises a butterfly rod (30), a box rod (50), a first slider (10a, 70a) for reverse opening, and a second slider (10b, 70b) for forward opening. The first slider (10a, 70a) has claw portions (22, 82) that can move back and forth in the element guide path (17). The box rod (50) has a box rod body portion (53) that is attached to the fastener tape, and a bulging portion (55) that expands in the width direction from the box rod body portion (53) toward the claw portions (22, 82) of the first slider (10a, 70a) that are held at the sliding limit position.

Description

Technical Field

[0006] , ,

[0001] The present invention relates to a separating and inserting device used for a slide fastener.

Background Art

[0002] In a conventional slide fastener, a separating and inserting device may be provided so that when the slider is slid to completely separate the left and right element rows, the left and right fastener strings can be pulled apart from each other.

[0003] As such a separating and inserting device, there are a normal type separating and inserting device that uses a wing bar, a box bar, a box body, and a slider to connect and separate the left and right fastener strings, and a reverse opening type separating and inserting device that uses a wing bar, a box bar, and two sliders to connect and separate the left and right fastener strings. The normal type separating and inserting device is sometimes called a forward opening type separating and inserting device.

[0004] An example of a separating and inserting device used for a slide fastener is described in, for example, Japanese Patent Application Laid-Open No. 2002-136309 (Patent Document 1). In the separating and inserting device described in Patent Document 1, an inclined surface that slopes upward from the wing bar tip of the wing bar toward the wing bar base end is provided on the upper surface portion of the wing bar. Thereby, when inserting the wing bar into the slider, it is possible to prevent the insertion of the wing bar from being obstructed by a claw portion provided on the cover body of the slider. For this reason, the insertion operation of the wing bar can be performed smoothly.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the slider described in Patent Document 1, a stopping mechanism is formed by the claw portion of the cover body being provided so as to protrude into the element guide path of the slider body and engage with the row of elements. In such a stopping mechanism, when the slider is stopped relative to the row of elements, the claw portion of the cover body is inserted into and engages with the row of elements, so that the slider can be held in that stopping position. In the following description, a slider in which the claw portion is integrally provided on the cover body and the cover body is arranged so as to be able to swing up and down, as in Patent Document 1, may also be referred to as a slider with a movable cover.

[0007] Incidentally, the stopping mechanisms provided in conventional sliders are formed in various structures depending on the application of the slide fastener and the shape of the slider. Furthermore, sliders with different stopping mechanism structures often differ in the position where the claw portion protrudes into the element guide path of the slider body, as well as the size of the claw portion. Therefore, when forming a detachable fitting using a slider equipped with a stopping mechanism, the position and size of the butterfly rod and box rod, as well as the claw portion of the slider, are usually taken into consideration when forming the detachable fitting.

[0008] However, when the butterfly pin and box pin of a disengagement tool are formed to correspond to one type of slider equipped with a stop mechanism, and then a different type of slider with a different stop mechanism structure is used to form the disengagement tool, the butterfly pin may easily get caught on the slider's claws during insertion or removal operations. As a result, this leads to a decrease in the operability of the disengagement tool (especially the operability of the butterfly pin).

[0009] The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a release insertion device that makes it difficult for the butterfly pin to get caught on the claw portion of the slider when inserting the butterfly pin into the slider. [Means for solving the problem]

[0010] To achieve the above objective, the release insert provided by the present invention is a release insert used for a slide fastener, the release insert having a butterfly bar provided on the first fastener stringer of the slide fastener, a box bar provided on the second fastener stringer of the slide fastener, a first slider for reverse opening, and a second slider for forward opening, the box bar being formed to hold the first slider and the second slider at their sliding limit positions, the first slider having a claw portion that can move back and forth in an element guide path, the box bar having a box bar body portion attached to the fastener tape of the second fastener stringer, and a bulging portion that expands in the width direction from the box bar body portion toward the claw portion of the first slider held at the sliding limit position.

[0011] In the release fitting device of the present invention, it is preferable that the bulging portion has a shape that is close to or in contact with the claw portion of the first slider which is held at the sliding limit position. Furthermore, the butterfly bar has a butterfly bar body portion that is attached to the fastener tape of the first fastener stringer, and the butterfly bar body portion has an upper surface that is positioned opposite to the upper wing plate of the first slider and a lower surface that is positioned opposite to the lower wing plate of the first slider, and preferably the tip portion on the upper surface side of the butterfly bar body portion has an inclined surface that slopes downward toward the corner portion of the tip portion that is positioned opposite to the box bar.

[0012] Furthermore, it is preferable that the bulging portion has a protruding portion that extends in the width direction beyond the widthwise centerline of the first slider held at the sliding limit position. In this case, it is preferable that the bulging portion has a shape such that the claw portion of the first slider is positioned within the formation range of the bulging portion in the slider sliding direction.

[0013] In the present invention, it is preferable that the bulging portion has a posture control unit capable of controlling the posture of the butterfly bar by bringing it into contact with the tip of the butterfly bar inserted into the first slider. Furthermore, the bulging portion has a bulging tip that is positioned furthest from the box bar body in the width direction, and it is preferable that the bulging tip is positioned closer to the rear opening of the first slider than the claw portion of the first slider held at the sliding limit position in the slider sliding direction.

[0014] Furthermore, the box bar has an inner edge facing the butterfly bar in a plan view of the box bar, and the inner edge of the box bar has a bulging tip portion that is furthest in the width direction from the box bar body portion of the bulging portion, a first inclined portion that extends from the bulging tip portion toward the base end of the box bar and is inclined with respect to the slider sliding direction, and a second inclined portion that extends from the bulging tip portion toward the tip of the box bar and is inclined with respect to the slider sliding direction, and it is preferable that the first inclination angle of the first inclined portion toward the slider sliding direction is greater than the second inclination angle of the second inclined portion toward the slider sliding direction.

[0015] In the present invention, it is preferable that the element guide path of the first slider has a narrow section in which, when the first slider is held in the sliding limit position, the width dimension of the space in the element guide path into which the butterfly rod can be inserted is limited to less than 50% of the width dimension of the element guide path by the bulging portion of the box rod.

[0016] In this case, it is preferable that the element guide path of the first slider has a wide section in which the width dimension of the space into which the butterfly rod of the element guide path can be inserted is larger than that of the narrow section, and that the wide section is positioned closer to the rear opening of the first slider than the narrow section. [Effects of the Invention]

[0017] According to the opening and closing insert of the present invention, for example, when the butterfly bar and box bar are formed to correspond to a slider equipped with a stopping mechanism, even if a different type of slider with a different structure of the stopping mechanism is used for the butterfly bar and box bar, it is possible to make it less likely for the butterfly bar to get caught on the claw portion of the slider when inserting the butterfly bar into the slider.

Brief Description of the Drawings

[0018] [Figure 1] It is a partial cross-sectional view schematically showing a separation and insertion tool according to an embodiment of the present invention. [Figure 2] It is a plan view schematically showing the butterfly bar of the separation and insertion tool shown in FIG. 1. [Figure 3] It is a side view of the butterfly bar shown in FIG. 2 as viewed from the inner side in the width direction. [Figure 4] It is a cross-sectional view of the butterfly bar at the IV-IV line shown in FIG. 2. [Figure 5] It is a plan view schematically showing the box bar of the separation and insertion tool shown in FIG. 1. [Figure 6] It is a bottom view of the box bar shown in FIG. 5. [Figure 7] It is a side view of the box bar shown in FIG. 5 as viewed from the outer side in the width direction. [Figure 8] It is a perspective view schematically showing a part of the first slider used in the separation and insertion tool shown in FIG. 1. [Figure 9] It is a schematic diagram explaining the relationship between the box bar in the separation and insertion tool shown in FIG. 1 and the slider body and claw part of the first slider. [Figure 10] It is a schematic diagram explaining the insertion of the butterfly bar into the first slider and the second slider in the separation and insertion tool shown in FIG. 1. [Figure 11] [[ID=3�]]It is a partial cross-sectional view schematically showing a separation and insertion tool according to a modified example.

Modes for Carrying Out the Invention

[0019] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings by giving examples. [[ID=,46]]

[0020] Figure 1 is a schematic partial cross-sectional view showing the release fitting according to this embodiment. Figures 2 to 4 are schematic plan view, side view, and cross-sectional view showing the hinge bar forming the release fitting of this embodiment, respectively. Figures 5 to 7 are schematic plan view, bottom view, and side view showing the box bar forming the release fitting of this embodiment, respectively. In this embodiment, in Figure 1 and Figures 9 and 10 described later, the first slider and the second slider are shown in cross-sectional shapes perpendicular to each other vertically in order to clearly illustrate the features of the present invention, and the hinge bar and box bar are shown in shapes viewed from above, rather than in cross-section.

[0021] In the following description of the slide fastener and release / removal fitting 1, the front-rear direction is the direction along the longitudinal direction of the pair of first and second fastener stringers, and also the direction along the sliding direction in which the first slider 10a and second slider 10b slide. In this case, with respect to the front-rear direction, the direction in which the second slider 10b for forward opening slides to close the slide fastener, and the direction in which the first slider 10a for reverse opening slides to open the slide fastener are defined as the front, and the opposite direction is defined as the rear.

[0022] The left-right direction is the direction along which a pair of fastener stringers move closer to or further apart from each other. The left-right direction can also be rephrased as the width direction of the fastener tape, the butterfly bar 30, and the box bar 50. In this case, with respect to the left-right direction, the direction in which each left and right fastener stringer approaches the other fastener stringer is considered the inside of the left-right direction, and the direction in which it moves away from the other fastener stringer is considered the outside of the left-right direction. Similarly, the direction in which the butterfly bar 30 and the box bar 50 of the opening / closing fitting device 1 approach each other is considered the inside of the left-right direction, and the direction in which they move away from each other is considered the outside of the left-right direction. The width direction is the direction perpendicular to the thickness of the fastener tape (or the direction along the tape surface or back surface of the fastener tape) in a cross-sectional view perpendicular to the front-rear direction of the fastener stringer.

[0023] The vertical direction is perpendicular to the front-to-back and left-to-right directions mentioned above. The vertical direction can also be described as the front-to-back direction of the slide fastener, or the thickness direction of the fastener tape, the butterfly bar 30, and the box bar 50. In this case, with respect to the vertical direction, the side on which the slider's stop claw body 20 (claw portion 22) is positioned relative to the element rows of the first fastener stringer and the second fastener stringer is defined as the upper side, and the opposite side is defined as the lower side.

[0024] More specifically, in the case of the slide fastener and release / insertion device 1 of this embodiment, the front-to-back direction is the up-and-down direction on the plane of Figure 1. The left-to-right direction is the left-to-right direction on the plane of Figure 1. The up-and-down direction is the front-to-back direction on the plane of Figure 1. In this case, the top is the direction towards the front on the plane of Figure 1, and the bottom is the direction towards the back on the plane of Figure 1.

[0025] The slide fastener in this embodiment is provided with a reverse-opening type release insert 1, as shown in Figure 1. This release insert 1 is located at the rear end of the slide fastener. The slide fastener of this embodiment has a pair of left and right first fastener stringers (not shown) and a second fastener stringer (not shown). The slide fastener also has a first slider 10a and a second slider 10b that are slidable along the row of elements (not shown) provided on each fastener stringer, a stopper member (not shown) disposed adjacent to the front end of the left and right row of elements, a butterfly bar 30 disposed adjacent to the rear end of the row of elements on the first fastener stringer, and a box bar 50 disposed adjacent to the rear end of the row of elements on the second fastener stringer.

[0026] The first slider 10a is positioned further back than the second slider 10b. The first slider 10a is a reverse-opening slider that separates the left and right rows of elements by sliding the first slider 10a along the row of elements away from the hinge rod 30 and the box rod 50. The second slider 10b is a forward-opening slider that engages the left and right rows of elements by sliding the second slider 10b along the row of elements away from the hinge rod 30 and the box rod 50.

[0027] The detachable insert 1 of this embodiment has the aforementioned butterfly rod 30, box rod 50, first slider 10a, and second slider 10b, and is formed as a reverse-opening type detachable insert 1. The butterfly rod 30 and box rod 50 forming the detachable insert 1 can also be combined with sliders that have a different stopping mechanism structure from the first slider 10a and second slider 10b (see Figure 8) (for example, the first cover movable slider 70a and second cover movable slider 70b described later) to form a modified detachable insert 2 as shown in Figure 11.

[0028] In the slide fastener of this embodiment, the first fastener stringer, the second fastener stringer, and the stopper member are formed substantially in the same manner as the left fastener stringer, the right fastener stringer, and the stopper member used in conventional general slide fasteners equipped with a reverse-opening type release insert.

[0029] For example, in this embodiment, the first fastener stringer located on the left and the second fastener stringer located on the right, although not shown in the illustration, each have a long, strip-shaped fastener tape and a plurality of fastener elements fixed to the fastener tape. Each of the left and right fastener tapes has a tape body and a core cord portion formed on the inner side edge of the fastener tape. The core cord portion has a shape that bulges vertically relative to the tape body.

[0030] Each of the multiple fastener elements is formed by injection molding synthetic resin onto the tape side edge, including the core cord portion, of the fastener tape. The multiple fastener elements are provided on the fastener tape at regular intervals along the tape length direction (front-to-back direction), thereby forming a row of elements to which the slider can be slidably attached.

[0031] Each fastener element is fixed to the fastener tape by enclosing the side edge of the tape, covering a portion of the upper surface (tape surface) and a portion of the lower surface (tape back) of the fastener tape. Each fastener element has an element body fixed to the fastener tape, a neck portion extending inward from the element body in the left-right direction, a meshing head portion further extending inward from the neck portion in the left-right direction, and a pair of shoulder portions protruding in the front-rear direction from the neck portion.

[0032] The neck portion of the fastener element has a tapered shape that narrows its dimension in the front-to-back direction. The interlocking head is formed in a roughly oval shape in a plan view of the fastener element. At the tip of the interlocking head (the inner end in the left-to-right direction), an insertion recess is formed along the front-to-back direction for inserting the shoulder portion of the fastener element that it interlocks with. In this invention, the fastener tape and fastener element are not particularly limited and can be changed depending on the application of the slide fastener, etc.

[0033] The stopper members (not shown) of the slide fasteners are provided adjacent to the front end of the element row on each of the left and right first fastener stringers and second fastener stringers. The installation of the stopper members sets the forward sliding limit position of the second slider 10b and prevents the first slider 10a and the second slider 10b from falling off the front side of the element row.

[0034] As described above, the opening and closing insert 1 of this embodiment includes a butterfly bar 30 provided on the left first fastener stringer (not shown), a box bar 50 provided on the right second fastener stringer (not shown), and a first slider 10a and a second slider 10b that are slidably attached to the element row of the second fastener stringer.

[0035] In the release fastener 1 of this embodiment, when the slide fastener is viewed from above, the butterfly bar 30 is positioned on the left first fastener stringer and the box bar 50 is positioned on the right second fastener stringer. Therefore, the release fastener 1 of this embodiment is formed as a right-hand type release fastener 1, which allows the wearer to operate the butterfly bar 30 of the release fastener 1 with their right hand when the slide fastener having the release fastener 1 is attached to, for example, clothing.

[0036] In this right-hand insertion type release insert 1, the first slider 10a and the second slider 10b are indestructibly attached to the element row of the right-side second fastener stringer on which the box bar 50 is provided. Furthermore, the first slider 10a and the second slider 10b are formed with the same structure as each other, and are attached to the element row with their rear openings facing each other, as will be described later.

[0037] The first slider 10a and the second slider 10b, as shown in Figure 8 for example, each include a slider body 11, a stop claw body 20 placed on the slider body 11, a cover body (not shown) that covers the stop claw body 20 from above and is fixed to the slider body 11, and a pull handle (not shown) whose shaft is attached and held between the slider body 11 and the cover body. In the first slider 10a and the second slider 10b, the stop claw body 20 is pivotably attached to the slider body 11 inside the cover body.

[0038] The slider fuselage 11 includes an upper wing plate 12, a lower wing plate 13 spaced apart from the upper wing plate 12, a connecting column 14 connecting the front ends (shoulder ends) of the upper wing plate 12 and the lower wing plate 13, upper and lower flange portions 15 located on the left and right side edges of the upper wing plate 12 and the lower wing plate 13, and front and rear cover mounting portions 16 protruding upward from the upper wing plate 12. The upper end of the front cover mounting portion 16 is provided with a projection 16a that is inserted into a mounting opening 21a of the stop claw body 20, which will be described later.

[0039] The front end of the slider fuselage 11 has left and right shoulders with a guide post in between. The rear end of the slider fuselage 11 has a rear opening. Between the upper wing plate 12 and the lower wing plate 13, there is a roughly Y-shaped element guide path 17 that connects the left and right shoulders and the rear opening. The slider fuselage 11 is provided with a claw hole 18 that penetrates vertically through the upper wing plate 12 and the rear cover mounting portion 16. Between the upper flange portion 15 and the lower flange portion 15 of the slider fuselage 11, there is an insertion gap through which a fastener tape is inserted.

[0040] The stop claw body 20 is formed by press-forming a metal plate material such as a copper alloy. The stop claw body 20 is sometimes called a lock pin. The stop claw body 20 has a claw body portion 21 which has a roughly C-shape when viewed from the side, a claw portion 22 which extends from the rear end of the claw body portion 21 with a smaller width dimension (dimension in the left-right direction), and an elastic biasing portion 23 which branches upward from the claw body portion 21.

[0041] The claw body portion 21 is formed with a constant width dimension from its front end to its rear end. The claw body portion 21 has a substantially rectangular mounting opening 21a and a narrow opening that extends linearly rearward from the mounting opening 21a. When the stop claw body 20 is placed on the slider body 11, the projection 16a provided on the slider body 11 is inserted into the mounting opening 21a of the claw body portion 21.

[0042] The claw portion 22 of the stop claw body 20 extends downward from the rear end of the claw body portion 21. The claw portion 22 is provided so as to be able to enter and exit the element guide path 17 of the slider body 11 via a claw hole 18 provided in the slider body 11. By entering the element guide path 17 of the slider body 11, the claw portion 22 engages with the row of elements of the first fastener stringer or the second fastener stringer inserted into the element guide path 17.

[0043] As a result, the stopping mechanisms provided on the first slider 10a and the second slider 10b are activated, locking the first slider 10a and the second slider 10b so that they do not slide relative to the element row. In this embodiment, the stopping claw body 20 is attached to the slider body 11 such that the claw portion 22 can move within a small range in the left-right direction within the element guide path 17.

[0044] The elastic biasing portion 23 of the stop claw body 20 elastically deforms so as to come into contact with the ceiling portion (upper wall portion of the cover) of the cover body and approach the claw body portion 21 when the stop claw body 20 is mounted between the slider body 11 and the cover body. As a result, the elastic biasing portion 23 generates an elastic force that biases the claw body portion 21 downward, causing the claw portion 22 to be inserted into the element guide path 17 through the claw hole 18 of the slider body 11.

[0045] The slider cover (not shown) has a box-like shape with an opening at the bottom. The cover is fixed to the front and rear cover mounting portions 16 of the slider body 11 by locally pressing several points on the cover toward the front and rear cover mounting portions 16, causing plastic deformation, while the front and rear cover mounting portions 16 of the slider body 11 are housed in the internal space of the cover.

[0046] The first slider 10a and the second slider 10b can engage and disengage the element rows by sliding along the left and right element rows. The first slider 10a can slide backward to a position where it abuts against a slider stopper 56, which will be described later and is provided on the box bar 50, and the rear sliding limit position of the first slider 10a is determined by the slider stopper 56. The second slider 10b can slide backward to a position where it contacts the first slider 10a, which is abutting against the slider stopper 56, and the rear sliding limit position of the second slider 10b is determined by the slider stopper 56 and the second slider 10b.

[0047] The butterfly pin 30 of the detachable fastener 1 is fixed to the fastener tape of the first fastener stringer by injection molding of synthetic resin, so as to straddle the upper and lower surfaces of the fastener tape. The butterfly pin 30 is provided adjacent to the rear end of the element row in the first fastener stringer and continuous with the element row.

[0048] The butterfly rod 30 is insertable into the element guide path 17 of the second slider 10b and the element guide path 17 of the first slider 10a from the shoulder of the second slider 10b, relative to the first slider 10a and the second slider 10b which are held at the rear sliding limit position, and can also be withdrawn from the element guide path 17 of the first slider 10a and the second slider 10b via the shoulder of the second slider 10b.

[0049] The butterfly bar 30 in this embodiment has an upper half 30a (first half) of the butterfly bar that is positioned on the upper surface side of the fastener tape, and a lower half 30b (second half) of the butterfly bar that is positioned on the lower surface side of the tape, with the center position in the thickness direction of the fastener tape as the boundary. The butterfly bar 30 has a base end (front end) 31 of the butterfly bar that is positioned on the side of the butterfly bar 30 closer to the fastener element, and a tip (rear end) 32 of the butterfly bar that is positioned on the side of the butterfly bar 30 further away from the fastener element.

[0050] As shown in Figures 2 to 4, the butterfly bar 30 of this embodiment includes a butterfly bar body portion 33 attached to the fastener tape of the first fastener stringer, a butterfly bar extension portion 34 extending inward in the left-right direction from the front portion of the butterfly bar body portion 33, an engagement groove portion 35 provided in the butterfly bar extension portion 34, a base end projection portion 36 protruding inward in the left-right direction from the butterfly bar base end portion 31 of the butterfly bar body portion 33, and a claw receiving recess portion 37 provided in the middle portion of the butterfly bar body portion 33 in the front-rear direction.

[0051] Furthermore, the butterfly rod 30 has a tip inclined surface 38 provided on the butterfly rod tip 32 of the butterfly rod body 33, four molded recesses 41 having a recessed shape from the upper or lower surface of the butterfly rod body 33, a front pin inclined surface 44 extending forward from one of the molded recesses 41 on the upper side, and a rear pin inclined surface 45 extending rearward from one of the molded recesses 41 on the lower side.

[0052] The butterfly bar body 33 is formed to be elongated in the front-to-back direction and is fixed to the tape side edge of the fastener tape. When the butterfly bar body 33 is divided into three equal parts in the front-to-back direction, for example, it has a front portion, a middle portion, and a rear portion, in order from the side closest to the element row. The butterfly bar body 33 has a shape in which the middle portion in the front-to-back direction is slightly curved so as to bulge inward in the left-to-right direction. The butterfly bar body 33 has an upper butterfly bar surface (first surface) facing upward and a lower butterfly bar surface (second surface) facing downward.

[0053] The upper surface of the butterfly bar body 33 faces the upper wing plates 12 of the first slider 10a and the second slider 10b when the butterfly bar body 33 is inserted into the first slider 10a and the second slider 10b. The upper surface of the butterfly bar has a flat surface perpendicular to the vertical direction and an inclined surface that slopes slightly downward toward the rear (see Figures 3 and 4). The flat surface of the upper surface of the butterfly bar extends from the base end 31 of the butterfly bar to behind the center position in the front-rear direction of the butterfly bar 30. The inclined surface of the upper surface of the butterfly bar is provided on at least a part of the rear half of the butterfly bar body 33 to facilitate insertion of the butterfly bar 30 into the shoulder of the second slider 10b.

[0054] The lower surface of the butterfly bar body 33 faces the lower wing plates 13 of the first slider 10a and the second slider 10b when the butterfly bar body 33 is inserted into the first slider 10a and the second slider 10b. The lower surface of the butterfly bar is formed by flat surfaces perpendicular to each other in the vertical direction. The thickness dimension (vertical dimension) between the flat surface of the upper surface of the butterfly bar body 33 and the lower surface of the butterfly bar is set to be the same as the thickness dimension of the fastener element.

[0055] The butterfly bar extension 34 is integrally provided on the front portion of the butterfly bar body 33. The butterfly bar extension 34 protrudes inward in the left-right direction from the vertical center or approximately the center of the butterfly bar body 33 by a certain thickness (vertical dimension) or approximately a certain thickness. The butterfly bar extension 34 has an inner side wall surface facing inward in the left-right direction, which is provided to face the box bar 50.

[0056] The front end of the butterfly bar extension 34 is provided with an engaging recess 34a that curves concavely toward the rear and an engaging projection 34b that protrudes toward the front. The engaging recess 34a and the engaging projection 34b engage with the fastener element of the right-side second fastener stringer when the left and right element rows are interlocked. In a plan view of the butterfly bar 30 (Figure 2), the butterfly bar extension 34 has a roughly triangular shape, except for the engaging recess 34a and the engaging projection 34b, such that the width dimension (dimension in the left-right direction) of the butterfly bar extension 34 gradually increases toward the front.

[0057] The engagement groove 35 of the butterfly bar 30 is located in the center of the butterfly bar extension 34 in the vertical direction, corresponding to the engagement projection 54 of the box bar 50, which will be described later. It is also formed to be recessed from the inner side wall surface in the left-right direction of the butterfly bar extension 34 toward the outside in the left-right direction. When the butterfly bar 30 is housed in the element guide path 17 of the first slider 10a and the second slider 10b, the engagement projection 54 of the box bar 50 is inserted into this engagement groove 35 and engages with the engagement projection 54.

[0058] The claw-receiving recess 37 of the butterfly bar 30 is located in the middle of the butterfly bar body 33 in the front-to-back direction, corresponding to the position of the claw portion 22 of the first cover movable slider 70a as shown in Figure 11, and is open to the outside in the left-to-right direction. The claw-receiving recess 37 has a bottom portion formed by a flat surface, and a front end portion, a side edge portion, and a rear end portion that surround the bottom portion.

[0059] The front end and side edges of the claw housing recess 37 each have a stepped portion provided between the bottom surface of the claw housing recess 37 and the upper surface of the butterfly bar body 33. The side edges of the claw housing recess 37 are provided on the inside in the left-right direction of the claw housing recess 37, and are inclined in the front-rear direction such that the rear end of the claw housing recess 37 is positioned further outward in the left-right direction than the front end of the claw housing recess 37. The rear end of the claw housing recess 37 has an inclined surface that slopes upward from the bottom surface of the claw housing recess 37 toward the upper surface of the butterfly bar body 33.

[0060] The tip inclined surface 38 of the butterfly rod 30 is provided at the inner end in the left-right direction on the upper surface of the butterfly rod tip portion 32. The tip inclined surface 38 is formed by a plane that slopes downward toward the inner vertex (corner) in the left-right direction on the tip edge of the butterfly rod 30. The tip inclined surface 38 may also be formed by a curved surface that slopes downward toward the aforementioned vertex.

[0061] The presence of such a tip-inclined surface 38 on the tip portion 32 of the butterfly rod allows the claw portion 22 of the first slider 10a to be brought into contact with the tip-inclined surface 38 of the butterfly rod 30 when inserting the butterfly rod 30 into the element guide path 17 of the first slider 10a (see Figure 10), thereby lifting the claw portion 22 of the first slider 10a with the tip-inclined surface 38 and / or moving it inward in the left-right direction. This prevents or suppresses the butterfly rod tip portion 32 from getting caught on the claw portion 22 of the first slider 10a, which would hinder the insertion operation of the butterfly rod 30.

[0062] The molded recesses 41 of the butterfly bar 30 are pin marks left when the fastener tape was pressed down with pins to position the fastener tape during injection molding of the butterfly bar 30 onto the fastener tape. In this embodiment, the molded recesses 41 have two upper molded recesses 42 provided in the upper half 30a of the butterfly bar and two lower molded recesses 43 provided in the lower half 30b of the butterfly bar. The upper molded recesses 42 and the lower molded recesses 43 are provided at mutually corresponding positions in the upper half 30a and lower half 30b of the butterfly bar 30.

[0063] The upper molded recess 42 has a front recess 42a provided on the front portion of the butterfly bar body 33 in the front-rear direction, and a rear recess 42b provided on the rear portion of the butterfly bar body 33 in the front-rear direction. The front recess 42a and the rear recess 42b of the upper molded recess 42 are formed to be the same shape and size. The front recess 42a and the rear recess 42b each have a shape that is recessed downward from the upper surface of the butterfly bar body 33 in the vertical direction, and also show a circular shape (perfect circle shape) in a plan view of the butterfly bar 30 (Figure 2). A cylindrical space is formed inside the upper molded recess 42.

[0064] The lower molded recess 43 has a front recess 43a provided on the front part of the butterfly bar body 33 and a rear recess 43b provided on the rear part of the butterfly bar body 33. The front recess 43a and the rear recess 43b of the lower molded recess 43 are formed to be the same shape and size as each other. The front recess 43a and the rear recess 43b each have a shape that is recessed in the vertical direction from the lower surface of the butterfly bar body 33 upwards, and also show a circular shape (perfect circle) when viewed from the bottom of the butterfly bar 30 (not shown). A cylindrical space is formed inside the lower molded recess 43.

[0065] In this invention, the number, shape, and size of the molded recesses 41 (upper molded recess 42 and lower molded recess 43) provided in the butterfly rod 30 are not limited. For example, the molded recesses 41 may be formed to show shapes other than circles, such as ellipses or polygons, when viewed from above or below the butterfly rod 30.

[0066] The rear recess 42b of the upper molded recess 42 is provided with a front pin inclined surface 44 that extends forward from the rear recess 42b. The front pin inclined surface 44 slopes upward from the upper molded recess 42 toward the front, such that the thickness dimension (vertical dimension) of the butterfly bar body 33 increases. In other words, the front pin inclined surface 44 slopes downward toward the rear recess 42b from a position forward of the rear recess 42b on the upper surface of the butterfly bar body 33.

[0067] The front pin inclined surface 44 is formed such that its width gradually increases toward the front. A step is provided between the front pin inclined surface 44 and the bottom surface of the rear recess 42b. In this invention, however, the front pin inclined surface 44 and the bottom surface of the rear recess 42b may be formed to be smoothly continuous without a step.

[0068] Here, we will briefly explain the effect of the front pin inclined surface 44. For example, when the butterfly rod 30 and the box rod 50 are combined with the first cover movable slider 70a (hereinafter abbreviated as the first movable slider 70a) and the second cover movable slider 70b (hereinafter abbreviated as the second movable slider 70b) to form a right-insertion type detachable fitting device 2, as will be described later, when the butterfly rod 30 is inserted from the shoulder of the second movable slider 70b (see, for example, Figure 11), the positions of the claw portions 22 and 82 that form the stopping mechanism are different between the first slider 10a and the first movable slider 70a in this embodiment. For this reason, in the detachable fitting device 2, the claw portion 82 of the first movable slider 70a may fall into the upper molded recess 42 (rear recess 42b).

[0069] In this case, because the butterfly rod 30 is provided with the aforementioned forward pin inclined surface 44, when the butterfly rod 30 is further inserted toward the rear after the claw portion 82 has fallen into the upper molded recess 42, the claw portion 82 that has fallen into the upper molded recess 42 can be lifted while moving along the forward pin inclined surface 44.

[0070] This prevents or suppresses the claw portion 82 of the first movable slider 70a from catching on the upper molded recess 42, allowing the butterfly rod 30 to be smoothly inserted into the element guide paths of the first movable slider 70a and the second movable slider 70b. In this invention, a rear pin inclined surface extending rearward from the rear recess 42b may be provided in place of, or together with, the front pin inclined surface 44, with respect to the rear recess 42b of the upper molded recess 42.

[0071] In this embodiment, the rear recess 43b of the lower molded recess 43 is provided with a rear pin inclined surface 45 that extends rearward from the rear recess 43b (see Figure 4). The rear pin inclined surface 45 slopes upward from the rear recess 43b towards the rear, such that the thickness dimension (vertical dimension) of the butterfly bar body 33 increases.

[0072] The rear pin inclined surface 45 is formed such that its width gradually increases towards the rear. A step is provided between the rear pin inclined surface 45 and the bottom surface of the lower molded recess 43. In this invention, however, the rear pin inclined surface 45 and the bottom surface of the lower molded recess 43 may be formed to be smoothly continuous without a step.

[0073] For example, when a left-insertion type detachable insert (not shown) is formed using a first movable slider 70a and a second movable slider 70b, even if the claw portion 82 of the second movable slider 70b falls into the lower molded recess 43 (rear recess 43b) of the butterfly rod 30 when the butterfly rod 30 is removed from the element guide path of the first movable slider 70a and the second movable slider 70b, the claw portion 82 is prevented or suppressed from getting caught in the lower molded recess 43, allowing the butterfly rod 30 to be removed smoothly. In this invention, a front pin inclined surface extending forward from the rear recess 43b may be provided in place of, or together with, the rear pin inclined surface 45, with respect to the rear recess 43b of the lower molded recess 43.

[0074] The box bar 50 of the release fitting 1 is formed by injection molding synthetic resin onto the fastener tape of the second fastener stringer. The box bar 50 is provided adjacent to the rear end of the element row in the second fastener stringer and continuous with the element row. The box bar 50 is formed to be able to hold the first slider 10a and the second slider 10b at their rear sliding limit positions.

[0075] The box bar 50 has an upper half (first half) 50a that is positioned on the upper surface side of the fastener tape, with the center position in the tape thickness direction of the fastener tape as the boundary, and a lower half (second half) 50b that is positioned on the lower surface side of the tape. In the front-rear direction, the box bar 50 has a base end (front end) 51 that is positioned on the side of the box bar 50 closer to the fastener element, and a tip end (rear end) 52 that is positioned on the side of the box bar 50 further away from the fastener element.

[0076] As shown in Figures 5 to 7, the box bar 50 includes a box bar body portion 53 fixed to the fastener tape of the second fastener stringer, an engaging projection portion 54 projecting inward in the left-right direction from the front portion in the front-rear direction of the butterfly bar body portion 33, a bulging portion 55 expanding inward in the left-right direction from the box bar body portion 53, four molded recesses 61 having a recessed shape from the upper or lower surface of the box bar body portion 53, a slider stopper portion 56 located at the tip (rear end) of the box bar body portion 53, and a first claw receiving recess 57 and a second claw receiving recess 58 provided on the lower half portion 50b of the box bar.

[0077] The box bar body portion 53 has a shape that is elongated in the front-to-back direction and is fixed to the tape side edge of the fastener tape. In this embodiment, for example, in a plan view of the box bar 50 (see Figure 5), if a virtual straight line 65 is set that extends along the front-to-back direction and passes through the connecting portion 54a that connects to the box bar body portion 53, the box bar body portion 53 is positioned outside the left-to-right direction of that virtual straight line 65 (to the right in Figure 5) and is formed of a portion with a certain thickness dimension or a substantially constant thickness dimension.

[0078] For example, if the box bar of the present invention is formed without the engaging projection 54 as in this embodiment, the virtual straight line defining the box bar body is defined by a straight line that passes through the intersection where the base edge (front edge) of the box bar intersects with the inner side edge in the left-right direction, and extends along the front-rear direction, in a plan view of the box bar.

[0079] The box bar body portion 53 has an upper surface (first surface) facing upward and a lower surface (second surface) facing downward. The upper and lower surfaces of the box bar body portion 53 are formed by flat surfaces perpendicular to the vertical direction. When the first slider 10a and the second slider 10b are held in the box bar body portion 53, the upper and lower surfaces of the box bar face the upper wing plate 12 and the lower wing plate 13 of the first slider 10a and the second slider 10b, respectively. The thickness dimension between the upper and lower surfaces of the box bar body portion 53 is set to be the same as the thickness dimension of the fastener element.

[0080] In a plan view of the box bar 50 (see, for example, Figures 5 and 9), the box bar 50 has an outer edge 50c that is positioned on the outside in the left-right direction. This outer edge 50c has a front outer edge that curves concavely away from the flange portion 15 of the first slider 10a and the flange portion 15 of the second slider 10b, an intermediate outer edge that extends from behind the front outer edge along the flange portion 15 of the first slider 10a, and a rear outer edge that extends from behind the intermediate outer edge away from the flange portion 15 of the first slider 10a.

[0081] The engaging projection 54 of the box bar 50 protrudes inward in the left-right direction from the center or approximate center of the box bar body 53 in the vertical direction. In a plan view of the box bar 50 (Figure 5), the engaging projection 54 has a roughly trapezoidal shape. The engaging projection 54 has a certain thickness dimension or a roughly certain thickness dimension that allows it to be inserted into the engaging groove 35 provided in the butterfly bar 30.

[0082] As shown in Figures 1 and 9, the bulging portion 55 of the box bar 50 is formed to bulge outwards from the main body portion 53 of the box bar toward the claw portion 22 of the first slider 10a (or toward the inside in the left-right direction) when the box bar 50 is housed in a predetermined position in the element guide path 17 of the first slider 10a. Here, the state in which the box bar 50 is housed in a predetermined position in the element guide path 17 of the first slider 10a can also be described as the state in which the first slider 10a is held by the box bar 50 at its rear sliding limit position.

[0083] In particular, the bulge portion 55 in this embodiment has a shape that approaches the claw portion 22 of the first slider 10a from the left and right directions. Also, the bulge portion 55 has the same thickness dimension as the box bar body portion 53. In this invention, the bulge portion 55 of the box bar 50 may have a shape that contacts the claw portion 22 of the first slider 10a from the left and right directions. Here, the shape of the bulge portion 55 that approaches the claw portion 22 means that the bulge portion 55 extends to a position very close to the claw portion 22 such that a small gap (for example, a gap smaller than the minimum width dimension of the claw portion 22) is formed between the claw portion 22 and the bulge portion 55. The shape of the bulge portion 55 that contacts the claw portion 22 means that the bulge portion 55 extends to a position where it directly contacts the claw portion 22 without any gap being formed between the claw portion 22 and the bulge portion 55.

[0084] The bulging portion 55 has a shape in which the portion corresponding to the position of the claw portion 22 of the first slider 10a and the portion near therein in the front-rear direction is closest to the hinge rod 30 in the left-right direction (width direction) within the bulging portion 55. The bulging portion 55 has a bulging tip portion 55a that is located furthest inward in the width direction from the box bar body portion 53 (or the imaginary straight line 65). In a plan view of the box bar 50 (Figure 5), this bulging tip portion 55a is located on the inner edge 50d of the box bar 50 that faces the hinge rod 30. In this case, the inner edge 50d of the box bar 50 is a side edge located inward in the width direction of the box bar 50.

[0085] The inner edge 50d of the box bar 50 has a bulging tip 55a, a first inclined portion 55b that extends from the bulging tip 55a toward the base end 51 of the box bar and is inclined in the front-rear direction, and a second inclined portion 55c that extends from the bulging tip 55a toward the tip 52 of the box bar and is inclined in the slider sliding direction. The bulging tip 55a, the first inclined portion 55b, and the second inclined portion 55c are provided on the bulging portion 55.

[0086] The presence of such a bulge 55 on the box bar 50 allows the movement of the butterfly bar 30 to be restricted within the element guide path 17 of the first slider 10a when the first slider 10a and the second slider 10b are held on the box bar 50 at their rear sliding limit positions. This restricts the movement of the butterfly bar tip 32 (particularly the tip inclined surface 38) so that it contacts the claw portion 22 of the first slider 10a.

[0087] This allows the claw portion 22 of the first slider 10a to be moved by the inclined tip surface 38 to the upper surface of the butterfly rod on the butterfly rod body portion 33, or to be moved between the butterfly rod 30 and the box rod 50. As a result, the butterfly rod 30 is less likely to get caught on the claw portion 22 of the first slider 10a, and can be inserted stably and smoothly to the butterfly rod housing position.

[0088] The butterfly rod housing position refers to the innermost (rearmost) position in the insertion direction of the butterfly rod 30, which is inserted from the shoulder of the second slider 10b, where the butterfly rod 30 can be inserted into the first slider 10a and the second slider 10b. It also refers to the holding position of the butterfly rod 30 that allows the second slider 10b to slide forward.

[0089] As shown in Figure 9, the bulging tip 55a of the bulging portion 55 is positioned in front of the claw portion 22 of the first slider 10a, which is held at the rear sliding limit position, in the front-rear direction (closer to the rear opening of the first slider 10a).

[0090] The first inclined portion 55b of the bulging portion 55 is formed as a posture control unit (posture control surface) that can control the posture of the butterfly rod 30 by bringing it into contact with the butterfly rod tip portion 32 of the butterfly rod 30. By forming the bulging tip portion 55a and the first inclined portion (posture control unit) 55b on the bulging portion 55 in this way, the movement of the butterfly rod 30 inserted to the butterfly rod housing position can be more appropriately restricted.

[0091] In the detachable insert 1 of this embodiment, the left-right center line of the first slider 10a held at the rear sliding limit position is defined as the reference center line (widthwise center line) 25 (see Figure 9). In this case, the bulge 55 of the box bar 50 has a protruding portion 55d that extends beyond the reference center line 25 and approaches the butterfly bar 30 in a plan view of the box bar 50. This protruding portion 55d includes the bulge tip portion 55a. Furthermore, the bulge 55 of this embodiment has a shape in which the claw portion 22 of the first slider 10a held at the sliding limit position is positioned within the formation range 55e of the protruding portion 55d in the front-rear direction.

[0092] Because the protruding portion 55d described above is provided on the bulging portion 55, in the element guide passage 17 of the first slider 10a held at the sliding limit position, the width dimension of the space into which the butterfly rod 30 of the element guide passage 17 can be inserted in the front-rear region where the protruding portion 55d is formed can be limited to less than 50% of the width dimension of the element guide passage 17 (i.e., the width dimension between the left and right flange portions 15).

[0093] Furthermore, the space in the element guide path 17 of the first slider 10a into which the butterfly rod 30 can be inserted means the passage through which the butterfly rod 30 can pass in the element guide path 17. In addition, in the first slider 10a, the space (passage for the butterfly rod 30) that is limited to less than 50% of the width dimension of the element guide path 17 is defined as the narrow passage 26.

[0094] In this case, the element guide path 17 of the first slider 10a has a narrow section 26 as described above and a wide section 27 such that the width of the space is 50% or more of the width of the element guide path 17, serving as a passage for the butterfly rod 30 (a space into which the butterfly rod 30 can be inserted). Furthermore, the wide section 27 of the element guide path 17 has a first wide section 27a located in front of the bulging tip 55a of the bulging section 55 (closer to the rear opening of the first slider 10a) and a second wide section 27b located behind the bulging tip 55a (away from the rear opening of the first slider 10a).

[0095] The element guide path 17 of the first slider 10a has a narrow section 26 and a first wide section 27a when the box bar 50 is inserted into the element guide path 17. This allows for a large space to be secured in the region near the rear opening of the element guide path 17 of the first slider 10a for inserting the butterfly bar 30. This makes it easier to insert the butterfly bar 30 from the element guide path 17 of the second slider 10b into the element guide path 17 of the first slider 10a. Subsequently, the movement of the butterfly bar 30 inserted into the element guide path 17 of the first slider 10a can be restricted by the narrow section 26 of the element guide path 17, making it less likely for the butterfly bar 30 to get caught on the claw section 22 of the first slider 10a.

[0096] Furthermore, because the element guide passage 17 has a second wide section 27b, when the butterfly rod 30 and box rod 50 are inserted into the element guide passage 17 of the first slider 10b, it is possible to easily slide the first slider 10b, which is held at the sliding limit position, forward.

[0097] In the box bar 50 of this embodiment, the angle at which the first inclined portion 55b provided on the bulging portion 55 is inclined with respect to the front-rear direction is defined as the first inclination angle θ1, and the angle at which the second inclined portion 55c is inclined with respect to the front-rear direction is defined as the second inclination angle θ2 (see Figure 9). In this case, the bulging portion 55 is formed such that the first inclination angle θ1 is greater than the second inclination angle θ2. As a result, the first wide section 27a described above can be easily provided with a simple structure in front of the bulging tip 55a of the bulging portion 55, making it easier to insert the butterfly bar 30 into the first slider 10a.

[0098] In this invention, the first inclination angle θ1 and the second inclination angle θ2 are, respectively, the inclination angles in the portion where the inner edge 50d of the box bar 50 is inclined at an angle of 5° or more with respect to the front-rear direction (in other words, the first inclination angle θ1 and the second inclination angle θ2 do not include the inclination angles in the portion where the inner edge 50d of the box bar 50 is inclined at an angle of less than 5° with respect to the front-rear direction).

[0099] The box bar 50 has a first box bar recess 66 positioned in front of the bulging tip 55a of the bulging portion 55 and recessed outward in the left-right direction from the bulging tip 55a, and a second box bar recess 67 positioned behind the bulging tip 55a of the bulging portion 55 and recessed outward in the left-right direction from the bulging tip 55a. In other words, the bulging tip 55a of the bulging portion 55 is positioned between the first box bar recess 66 and the second box bar recess 67 in the front-rear direction.

[0100] The molded recesses 61 of the box bar 50 are pin marks left when the fastener tape was pressed down with pins to position the fastener tape during injection molding of the box bar 50 onto the fastener tape. In this embodiment, the molded recesses 61 have two upper molded recesses 62 provided in the upper half 50a of the box bar and two lower molded recesses 63 provided in the lower half 50b of the box bar. The upper molded recesses 62 and the lower molded recesses 63 are provided at corresponding positions on the upper half 50a and lower half 50b of the box bar 50. Each molded recess 61 of the box bar 50 is formed substantially in the same manner as the molded recesses 41 provided on the hinge bar 30. In this invention, the number, shape, and size of the molded recesses 61 provided on the box bar 50 are not limited.

[0101] The slider stopper portion 56 of the box bar 50 protrudes downward from the lower surface of the box bar body portion 53 so that it can contact the lower wing plate 13 of the first slider 10a. The slider stopper portion 56 restricts the rearward sliding of the first slider 10a by contacting it. The slider stopper portion 56 defines the rearward sliding limit position of the first slider 10a.

[0102] The first claw-receiving recess 57 of the box bar 50 is formed in the central part of the box bar body 53 in the front-rear direction, recessed upward from the lower surface of the box bar body 53. The first claw-receiving recess 57 opens to the inner edge of the box bar body 53. The first claw-receiving recess 57 can accommodate the claw portion 22 of the first slider 10a, which is held at the sliding limit position, when a left-insertion type detachable fitting device (not shown) is formed using the butterfly bar 30, box bar 50, first slider 10a, and second slider 10b of this embodiment.

[0103] The second claw-receiving recess 58 of the box bar 50 is formed in a position forward of the first claw-receiving recess 57 on the box bar body 53, and further outward in the left-right direction than the first claw-receiving recess 57, recessing upward from the lower surface of the box bar on the box bar body 53. The second claw-receiving recess 58 can accommodate the claw portion 82 of the first movable slider 70a, which is held at the sliding limit position, when a left-insertion type opening and closing fitting device (not shown) is formed using the butterfly bar 30 and box bar 50 of this embodiment and the first movable slider 70a and second movable slider 70b described above. In this invention, the box bar 50 may be formed without the second claw-receiving recess 58.

[0104] Next, the operation of engaging the element rows of the first and second fastener stringers, which are separated from each other, using the detachable fitting tool 1 of this embodiment will be explained with reference to Figures 1, 9, and 10.

[0105] First, grasp the pull handle (not shown) of the first slider 10a and slide the first slider 10a to a position where it contacts the slider stopper 56 of the box bar 50 (rear sliding limit position), thereby holding the first slider 10a on the box bar 50. Furthermore, when the first slider 10a moves to the sliding limit position and the operation by the pull handle is completed, the elastic force of the elastic biasing portion 23 of the stop claw body 20 causes the claw portion 22 of the stop claw body 20 to automatically protrude into the element guide path 17 of the slider body 11.

[0106] In this case, as shown in Figure 9, the claw portion 22 of the first slider 10a is positioned to the left of the reference center line 25 (away from the box bar 50) in the element guide path 17 in the left-right direction. In addition, the claw portion 22 of the first slider 10a is positioned in the range between the position where the distance between the left and right flange portions 15 begins to gradually increase towards the rear and the connecting column 14 in the front-rear direction. Furthermore, the claw portion 22 of the first slider 10a is positioned to be close to or in contact with the bulging portion 55 of the box bar 50.

[0107] After the first slider 10a is held at its sliding limit position, the pull tab (not shown) of the second slider 10b is grasped and the second slider 10b is slid to its sliding limit position where the rear end of the second slider 10b contacts the rear end of the first slider 10a, thereby holding the second slider 10b on the box bar 50. The claw portion 22 of the second slider 10b held at the sliding limit position is held on the upper surface of the box bar body portion 53 and / or engaging projection 54 at the box bar base end portion 51 of the box bar 50.

[0108] Next, the butterfly rod 30 of the detachable inserting tool 1 is inserted into the element guide path 17 from the right shoulder of the second slider 10b. Furthermore, by moving the butterfly rod 30 toward the rear, it enters both the element guide path 17 of the second slider 10b and the element guide path 17 of the first slider 10a. At this time, because the first inclined portion 55b is provided on the inner edge 50d of the box rod 50, even if the box rod 50 with the bulging portion 55 is inserted into the element guide path 17 of the first slider 10a, a relatively large space for inserting the butterfly rod 30 can be secured in the area near the rear opening of the first slider 10a. Therefore, the tip portion 32 of the butterfly rod 30 can be smoothly and stably inserted from the element guide path 17 of the second slider 10b into the element guide path 17 of the first slider 10a.

[0109] Subsequently, the butterfly rod tip 32 inserted into the second slider 10b moves the butterfly rod 30 further backward, so that the inclined tip surface 38 provided on the butterfly rod tip 32 contacts the claw portion 22 of the first slider 10a, as shown in Figure 10. At this time, as described above, the bulging tip 55a of the box rod 50 is positioned in front of the claw portion 22 of the first slider 10a. This narrows the gap between the bulging tip 55a of the bulging portion 55 and the left flange portion 15 of the first slider 10a in the element guide path 17 of the first slider 10a, thereby limiting the space through which the butterfly rod tip 32 can pass. As a result, the butterfly rod tip 32 of the butterfly rod 30 passes through this space, allowing the claw portion 22 of the first slider 10a to make stable contact with the inclined tip surface 38 of the butterfly rod tip 32.

[0110] Furthermore, the bulging portion 55 of the box bar 50 is provided with a first inclined portion (attitude control portion) 55b extending forward from the bulging tip portion 55a. As a result, even if the butterfly rod tip portion 32 of the butterfly rod 30 is inserted so as to approach the box bar body portion 53 in the region near the rear opening of the element guide path 17 of the first slider 10a, the butterfly rod tip portion 32 of the butterfly rod 30 is guided by contacting the first inclined portion 55b of the bulging portion 55, thereby appropriately controlling the attitude of the butterfly rod 30 and allowing the butterfly rod tip portion 32 to smoothly pass through the gap (space) between the bulging tip portion 55a of the bulging portion 55 and the left flange portion 15 of the first slider 10a.

[0111] In the release and insertion tool 1 of this embodiment, by bringing the inclined tip surface 38 of the butterfly rod tip 32 into contact with the claw portion 22 of the first slider 10a as described above, the claw portion 22 of the first slider 10a can be lifted by the inclined tip surface 38 and / or moved inward in the left-right direction by the inclined tip surface 38. This prevents or suppresses the butterfly rod tip 32 from getting caught on the claw portion 22 of the first slider 10a, which would hinder the insertion operation of the butterfly rod 30.

[0112] After the tip of the butterfly rod 32 contacts the claw portion 22 of the first slider 10a, the butterfly rod 30 is further inserted towards the rear, allowing the butterfly rod 30 to be moved to the butterfly rod housing position of the first slider 10a and the second slider 10b, as shown in Figure 1, and held in that position.

[0113] After the butterfly bar 30 is held in the butterfly bar housing position of the first slider 10a and the second slider 10b, the front second slider 10b for forward opening is slid forward. This allows the left and right fastener elements to interlock sequentially from the rear, thus closing the slide fastener. After closing the slide fastener by sliding the second slider 10b forward, the rear first slider 10a for reverse opening is slid forward, separating the left and right fastener elements sequentially from the rear, allowing the slide fastener to be opened from the rear.

[0114] On the other hand, when separating the left and right fastener elements and pulling apart the first fastener stringer and the second fastener stringer from a state where the slide fastener is closed by the second slider 10b for forward opening, first, the second slider 10b is slid along the row of elements to the sliding limit position where it abuts against the first slider 10a. Next, the butterfly bar 30 is pulled out from the element guide path 17 of the first slider 10a and the second slider 10b. This makes it possible to separate the first fastener stringer having the butterfly bar 30 from the second fastener stringer having the box bar 50.

[0115] As described above, in this embodiment, the release insert 1 provided on the slide fastener is formed by combining a butterfly bar 30 and a box bar 50 with a first slider 10a and a second slider 10b having a stop claw body 20 as shown in Figure 8. In this release insert 1, a bulge 55 is provided on the box bar 50, so that when inserting the butterfly bar 30 from the shoulder of the second slider 10b into the element guide path 17 of the second slider 10b and the element guide path 17 of the first slider 10a, the butterfly bar tip 32 of the butterfly bar 30 is less likely to get caught on the claw portion 22 of the first slider 10a, as described above.

[0116] Furthermore, the butterfly rod 30 and box rod 50 of this embodiment can also be combined with the first movable slider 70a and the second movable slider 70b shown in Figure 11, instead of the first slider 10a and the second slider 10b of this embodiment, to form a modified detachable fitting device 2.

[0117] In this case, the first movable slider 70a and the second movable slider 70b are attached to the element row with the rear openings of the slider body 11 facing each other. The first movable slider 70a is a reverse-opening slider that separates the left and right element rows by sliding the first movable slider 70a forward along the element row. The second movable slider 70b is a forward-opening slider that interlocks the left and right element rows by sliding the second movable slider 70b forward along the element row.

[0118] In the modified example of the detachable insertion device 2, the first movable slider 70a and the second movable slider 70b are formed substantially in the same manner as the slider described in Patent Document 1. For example, the first movable slider 70a includes a slider body 71, a cover body (not shown) rotatably attached to the slider body 71, an elastic member (not shown) attached to the inside of the cover body and biasing the cover body, and a pull handle (not shown) held between the slider body 71 and the cover body. For example, a spring member can be used as the elastic member.

[0119] The slider fuselage 71 includes an upper wing plate (not shown), a lower wing plate 73, a connecting column 74 connecting the upper wing plate and the lower wing plate 73, upper and lower flange portions 75 located on the left and right side edges of the upper and lower wing plates 73, and a cover mounting portion (not shown) protruding upward from the upper wing plate. The upper wing plate of the slider fuselage 71 is provided with claw holes (not shown) that penetrate the upper wing plate in the vertical direction.

[0120] The cover body has a roughly box-shaped cover body with an opening at the bottom, and a claw portion 82 that protrudes downward from the side wall of the cover body. In the modified example, the elastic member is installed inside the cover body so as to bias the cover body in a direction that causes the claw portion 82 of the cover body to advance into the element guide path 17 of the slider body 71.

[0121] The claw portion 82 of the cover body is formed with a larger size (particularly the size of the cross-section perpendicular to the vertical direction of the claw portion 82) compared to the claw portion 22 of the first slider 10a in the embodiment. The cross-section perpendicular to the vertical direction of the claw portion 82 has an elongated shape in the front-rear direction. The claw portion 82 has a first claw surface facing the connecting column 74 side of the slider body 71 and a second claw surface facing the rear opening side.

[0122] The first surface of the claw portion 82 is formed by an inclined surface that slopes diagonally or a curved surface that curves in a convex shape when the claw portion 82 is viewed from the left or right direction. The second surface of the claw portion 82 is formed by a plane that is aligned in the vertical direction or substantially in the vertical direction when the claw portion 82 is viewed from the left or right direction. Furthermore, the claw portion 82 of the cover body is positioned closer to the rear opening in the front-rear direction and further outward in the left-right direction compared to the claw portion 22 of the first slider 10a of the embodiment. The second movable slider 70b is formed with the same structure as the first movable slider 70a.

[0123] In this modified form of the detachable inserting device 2, when engaging the element rows of the first fastener stringer and the second fastener stringer, which are separated from each other, the first movable slider 70a and the second movable slider 70b are slid to the rear sliding limit position and held by the box bar 50 at the sliding limit position.

[0124] Next, the butterfly rod 30 of the detachable inserting tool 2 is inserted into the element guide path from the shoulder of the second movable slider 70b. Furthermore, by moving the butterfly rod 30 backward, it enters both the element guide path of the second movable slider 70b and the element guide path of the first movable slider 70a. At this time, in the area near the rear opening of the first movable slider 70a, a first inclined portion 55b is provided on the inner edge 50d of the box rod 50, so that a relatively large space is secured into which the butterfly rod 30 can be inserted. For this reason, the tip 32 of the butterfly rod 30 can be smoothly inserted from the element guide path 17 of the second movable slider 70b into the element guide path 17 of the first movable slider 70a.

[0125] Subsequently, by moving the butterfly rod 30 further backward, the tip of the butterfly rod 32 comes into contact with the claw portion 82 of the first movable slider 70a. At this time, the tip of the butterfly rod 32 is provided with a tip inclined surface 38, and the edges of the butterfly rod tip 32 other than the tip inclined surface 38 are formed in a curved shape as if they had been chamfered. Therefore, after the tip of the butterfly rod 32 comes into contact with the claw portion 82, as the butterfly rod 30 moves backward, the tip inclined surface 38 or the edges of the butterfly rod tip 32 can easily lift the claw portion 82 to the upper surface of the butterfly rod body 33.

[0126] Subsequently, as the butterfly rod 30 continues to move backward, the claw portion 82 of the first movable slider 70a reaches the molded recess 41 (rear recess 42b) provided in the upper half portion 30a of the butterfly rod 30, as shown in Figure 11, and falls into the molded recess 41. In this case, since the butterfly rod 30 is provided with a front pin inclined surface 44 that extends forward from the molded recess 41, even if the claw portion 82 falls into the molded recess 41, the butterfly rod 30 moves backward, allowing the claw portion 82 to be easily lifted onto the upper surface of the butterfly rod body portion 33 by the front pin inclined surface 44.

[0127] As the butterfly pin 30 is inserted as far as it will go into the first movable slider 70a and the second movable slider 70b, the butterfly pin 30 moves to the butterfly pin housing position. At this time, the claw portion 82 of the first movable slider 70a is inserted into and housed in the claw housing recess 37 of the butterfly pin 30. After the butterfly pin 30 has moved to and is held in the butterfly pin housing position, the front second movable slider 70b for forward opening is slid forward. This allows the left and right fastener elements to engage sequentially from the rear, thus enabling the slide fastener to be closed.

[0128] In this modified version of the detachable inserting device 2, although the stopping structures of the first movable slider 70a and the second movable slider 70b differ from those of the first slider 10a and the second slider 10b in the above-described embodiment, it is possible to make it less likely for the tip 32 of the butterfly rod 30 to get caught on the claw portion 82 of the first movable slider 70a when inserting the butterfly rod 30 into the first movable slider 70a and the second movable slider 70b.

[0129] In other words, by using the aforementioned butterfly rod 30 and box rod 50, even if separate detachable inserts 1 and 2 are formed by combining different types of sliders with different stop mechanism structures, when inserting the butterfly rod 30 into the first sliders 10a, 70a and the second sliders 10b, 70b with each detachable insert 1 and 2, it is possible to make it less likely for the butterfly rod 30 to get caught on the claw portions 22, 82 of the first sliders 10a, 70a. This improves the operability of each detachable insert 1 and 2 (especially the operability of the butterfly rod 30). Furthermore, it is possible to improve the sliding properties and starting properties of the first sliders 10a, 70a and the second sliders 10b, 70b.

[0130] Furthermore, the aforementioned butterfly rod 30 and box rod 50 can be combined with the first slider 10a and second slider 10b of the embodiment, or with the modified first movable slider 70a and second movable slider 70b, to form right-hand opening and closing inserts 1 and 2 in which the butterfly rod 30 is operated with the right hand.

[0131] As described above, the lower half 30b of the butterfly bar 30 is provided with a rear pin inclined surface 45, and the lower half 50b of the box bar 50 is provided with a first claw receiving recess 57 and a second claw receiving recess 58. As a result, the butterfly bar 30 and the box bar 50 can be combined with the first slider 10a and the second slider 10b of the embodiment, or with the modified first movable slider 70a and the second movable slider 70b, to form a left-hand insertion type opening and closing device (not shown) in which the butterfly bar 30 is operated with the left hand. Therefore, the versatility of the butterfly bar 30 and the box bar 50 in the opening and closing device can be improved, and the cost of the opening and closing device 1 can be reduced.

[0132] Furthermore, as described above, it is possible to form both left-insertion type release inserts 1 and 2 (see Figures 1 and 11) and right-insertion type release inserts (not shown), thereby reducing the number of slider types required for the release inserts. Consequently, it is possible to further reduce manufacturing costs, improve productivity and manufacturing efficiency, and simplify quality control and process control.

[0133] It should be noted that the present invention is not limited to the embodiments and modifications described above, and a variety of modifications are possible as long as they have substantially the same configuration as the present invention and produce similar effects.

[0134] For example, the above description shows the case where the butterfly rod 30 shown in Figures 2 to 4 and the box rod 50 shown in Figures 5 to 7 are combined with the first slider 10a and the second slider 10b of the embodiment to form a detachable fitting device 1, and the case where they are combined with the modified first movable slider 70a and the second movable slider 70b to form a detachable fitting device 2.

[0135] However, in the present invention, the butterfly rod 30 and the box rod 50 may be combined with two sliders equipped with stopping mechanisms other than those in the examples and comparative examples to form an opening and closing insert. Furthermore, in a single opening and closing insert, the first slider for reverse opening and the second slider for forward opening may be sliders with different stopping mechanism structures.

[0136] Furthermore, in this invention, as long as the box bar has the box bar body portion and bulging portion as described above, it is also possible to change the shapes of the butterfly bar and the box bar. Furthermore, the applications of the slide fastener equipped with the release and insertion device of the present invention are not particularly limited. [Explanation of Symbols]

[0137] 1,2 Opening and closing inserts 10a First Slider 10b Second Slider 11 Slider Torso 12 Upper wing plate 13 Lower wing plate 14 Connecting column 15 Flange section 16 Cover mounting section 16a Protrusion 17 Element Guideway 18 Claw hole 20 Stop claw body 21 Claw body 21a Mounting opening 22 Nail part 23 Elastic biasing section 25 Reference center line (width direction center line) 26 Narrow section 27 Hiroji section 27a 1st wide road section 27b 2nd wide road section 30 butterfly pin 30a Upper half of butterfly pin 30b Lower half of butterfly pin 31 Base end of insert pin (front end of insert pin) 32. Tip of the butterfly bar (rear end of the butterfly bar) 33. Butterfly rod main body 34 Butterfly bar extension 34a Engaging recess 34b Engagement protrusion 35 Engagement groove 36 Proximal protrusion 37 Claw housing recess 38 Tip inclined surface 41 Molded recess 42 Upper molded recess 42a Front recess 42b Rear recess 43 Downward molded recess 43a Front recess 43b Rear recess 44 Front pin inclined surface 45 Rear pin inclined surface 50 box bars 50a Box bar upper half 50b Lower half of box bar 50c Box bar outer edge 50d Box bar inner edge 51 Base end of box bar (front end of box bar) 52 Box bar tip (box bar rear end) 53 Box rod main body 54 Engagement protrusion 54a Connection part 55 Bulge 55a Swelling tip 55b First Inclination Section (Attitude Control Section) 55c 2nd slope 55d Overhang 55e Formation range 56 Slider stopper 57 First claw receiving recess 58 Second claw receiving recess 61 Molded recess 62 Upper molded recess 63 Downward molded recess 65 Virtual Line 66 First Box Rod Recess 67 Second box rod recess 70a First cover movable slider (first movable slider) 70b Second cover movable slider (second movable slider) 71 Slider Torso 73 Lower wing plate 74 Connecting column 75 Flange section 82 Nail part θ1 1st inclination angle θ2 2nd inclination angle

Claims

1. A release insert used in slide fasteners, The aforementioned opening and closing insert (1,2) has a butterfly bar (30) provided on the first fastener stringer of the slide fastener, a box bar (50) provided on the second fastener stringer of the slide fastener, a first slider (10a, 70a) for reverse opening, and a second slider (10b, 70b) for forward opening. The box bar (50) is formed to be able to hold the first slider (10a, 70a) and the second slider (10b, 70b) at their sliding limit positions. The first slider (10a, 70a) has claw portions (22, 82) that can move back and forth in the element guide path (17), The box bar (50) has a box bar body portion (53) attached to the fastener tape of the second fastener stringer, and a bulging portion (55) that bulges in the width direction from the box bar body portion (53) toward the claw portions (22, 82) of the first slider (10a, 70a) held at the sliding limit position. A detachable insertion device characterized by the following features.

2. The bulging portion (55) has a shape that is close to or in contact with the claw portions (22, 82) of the first slider (10a, 70a) which is held at the sliding limit position. The release and insertion device according to claim 1.

3. The aforementioned butterfly bar (30) has a butterfly bar body portion (33) that is attached to the fastener tape of the first fastener stringer, The butterfly bar body portion (33) has an upper surface positioned opposite to the upper wing plate (12) of the first slider (10a, 70a) and a lower surface positioned opposite to the lower wing plate (13, 73) of the first slider (10a, 70a). The tip portion (32) on the upper side of the butterfly bar body portion (33) has an inclined surface (38) that slopes downward toward the corner portion of the tip portion (32) that is positioned opposite the box bar (50). The release and insertion device according to claim 1.

4. The bulging portion (55) has a protruding portion (55b) that extends in the width direction beyond the widthwise centerline (25) of the first slider (10a, 70a) held at the sliding limit position. The release and insertion device according to claim 1.

5. The bulging portion (55) has a shape such that, in the slider sliding direction, the claw portions (22, 82) of the first slider (10a, 70a) are positioned within the formation range (55e) of the protruding portion (55b). The release and insertion device according to claim 4.

6. The bulging portion (55) has a posture control unit (55b) that can control the posture of the butterfly rod (30) by bringing the tip portion (32) of the butterfly rod (30), which is inserted into the first slider (10a, 70a), into contact with the bulging portion (55b). The release and insertion device according to claim 1.

7. The bulging portion (55) has a bulging tip portion (55a) that is located furthest from the box bar body portion (53) in the width direction, The bulging tip portion (55a) is positioned closer to the rear opening of the first slider (10a, 70a) than the claw portions (22, 82) of the first slider (10a, 70a) that are held at the sliding limit position, in the slider sliding direction. The release and insertion device according to claim 1.

8. The box bar (50) has an inner edge (50d) in a plan view of the box bar (50) that faces the butterfly bar (30), The inner edge (50d) of the box bar has a bulging tip (55a) that is furthest in width from the box bar body (53) of the bulging portion (55), a first inclined portion (55b) that extends from the bulging tip (55a) toward the box bar base end (51) and is inclined with respect to the slider sliding direction, and a second inclined portion (55c) that extends from the bulging tip (55a) toward the box bar tip (52) and is inclined with respect to the slider sliding direction. The first inclination angle (θ1) of the first inclined portion (55b) with respect to the slider sliding direction is greater than the second inclination angle (θ2) of the second inclined portion (55c) with respect to the slider sliding direction. The release and insertion device according to claim 1.

9. The element guide passage (17) of the first slider (10a, 70a) has a narrow passage (26) in which, when the first slider (10a, 70a) is held at the sliding limit position, the width dimension of the space in the element guide passage (17) into which the butterfly rod (30) can be inserted is limited to less than 50% of the width dimension of the element guide passage (17) by the bulging portion (55) of the box rod (50). The release and insertion device according to claim 1.

10. The element guide path (17) of the first slider (10a, 70a) has a wide section (27a) in which the width dimension of the space into which the butterfly rod (30) of the element guide path (17) can be inserted is larger than that of the narrow section (26). The wider section (27a) is positioned closer to the rear opening of the first slider (10a, 70a) than the narrower section (26). The release and insertion device according to claim 9.

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