Opening and closing insert

Abstract

The present invention provides a detachable insert that, even when using the same slider for both right-insertion and left-insertion types, makes it less likely for the slider's claw to catch on the butterfly pin. [Solution] The opening and closing insert (1,2) of the present invention has a butterfly bar (10,60), a box bar (20,70), and at least one slider (40,40a,40b). The butterfly bar (10,60) has a butterfly bar body (11,61), a base end insertion part (12,62) and a claw insertion passage (13,63) provided at the base end of the butterfly bar. The claw insertion passage (13,63) is positioned between the butterfly bar body (11,61) and the base end insertion part (12,62), and is formed so that a stop claw body (50) provided on the slider (40,40a,40b) can pass through. The bottom surface (13a,63a) of the claw insertion passage (13,63) is positioned lower in the thickness direction than the position of the first surface (11a,61a) of the butterfly bar body (11,61).

Description

Technical Field

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

Background Art

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

[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 stringers, 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 stringers. The normal type separating and inserting device may also be called a forward opening type separating and inserting device.

[0004] An example of a separating and inserting device 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 hindered by a claw portion provided on the cover body of the slider. Therefore, 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 this 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, thereby holding the slider in that stopping position.

[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 a release insert is provided for a slide fastener equipped with a slider that has a stopping mechanism, the release insert is usually formed taking into consideration the position and size of the butterfly pin and box pin of the release insert, as well as the claw portion of the slider.

[0008] Generally, there are two types of disengaging and inserting devices: right-hand type disengaging and inserting devices where the latch is operated with the right hand, and left-hand type disengaging and inserting devices where the latch is operated with the left hand. However, if different types of sliders with different stop mechanism structures are used for, for example, right-hand type disengaging and inserting devices and left-hand type disengaging and inserting devices, the number of slider types increases, resulting in increased manufacturing costs, decreased productivity and manufacturing efficiency, and increased complexity of quality control and process control.

[0009] On the other hand, if a slider with a stop mechanism used in a right-insertion type release / insertion device is applied directly to a left-insertion type release / insertion device, problems can occur such as the butterfly pin catching on the slider's claw when inserting the butterfly pin into the slider, or a part of the slider's claw catching on the butterfly pin when sliding the slider after inserting the butterfly pin.

[0010] The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a detachable insert that allows the use of a slider with a stop mechanism having the same structure for both right-insertion type and left-insertion type detachable inserts, and that, even when using a slider of the same structure, makes it difficult for the claw portion of the slider to catch on the butterfly pin when sliding the slider after insertion of the butterfly pin. [Means for solving the problem]

[0011] To achieve the above objective, the separation insert provided by the present invention comprises 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, and at least one slider into which the butterfly bar and the box bar can be inserted, and is capable of separating the first fastener stringer and the second fastener stringer from each other when the left and right fastener elements of the slide fastener are separated, wherein the butterfly bar comprises a first butterfly bar half disposed on one side in the thickness direction of the slide fastener and a second butterfly bar half disposed on the other side in the thickness direction, and in the length direction of the slide fastener, the fastener element The butterfly bar has a base end portion located closer to the fastener element and a tip portion located away from the fastener element, and the butterfly bar has a butterfly bar body portion attached to the fastener tape of the first fastener stringer, and a base end insertion portion and a claw insertion passage provided at the base end portion of the first butterfly bar half, the base end insertion portion is formed to be insertable between the box bar and the fastener element adjacent to the box bar in the second fastener stringer, the claw insertion passage is located between the butterfly bar body portion and the base end insertion portion and is formed to allow a part of the stop claw body provided on the slider to pass through, and the bottom surface of the claw insertion passage is located lower in the thickness direction than the first surface of the butterfly bar body portion facing one side in the thickness direction.

[0012] In the release insertion device of the present invention, it is preferable that the bottom surface of the claw insertion passage is positioned lower in the thickness direction than the first surface of the base end insertion portion that faces one direction in the thickness direction. Furthermore, it is preferable that the bottom surface of the claw insertion passage has a guide inclined surface that slopes downward in a direction approaching the fastener element of the first fastener stringer.

[0013] Furthermore, the base end insertion portion is provided as a first base end insertion portion, and a second base end insertion portion is provided at the base end of the second half of the butterfly bar, which is formed to be insertable between the box bar and the fastener element adjacent to the box bar, and it is preferable that the maximum thickness dimension of the first base end insertion portion is smaller than the maximum thickness dimension of the second base end insertion portion.

[0014] In the opening and closing insert of the present invention, it is preferable that a side step portion into which a part of the stop claw body can be inserted is provided on at least a part of the opposing side edge of the butterfly rod that faces the box rod, and that the side step portion has a stepped side wall surface formed from the first surface of the butterfly rod body via a bent portion, and a stepped bottom surface connected to the lower end of the stepped side wall surface.

[0015] In this case, it is preferable that the first surface of the base insertion portion facing one direction in the thickness direction and the bottom surface of the step of the side step portion form a smooth, continuous flat surface, and that the bottom surface of the step has a thickened inclined surface that slopes upward toward the first surface of the base insertion portion.

[0016] Furthermore, it is preferable that the side step portion has a width increasing portion that gradually increases the width dimension of the step bottom surface toward the base end of the butterfly bar. Furthermore, it is preferable that the side stepped portion is provided continuously in the longitudinal direction from the claw insertion passage to the tip of the butterfly bar.

[0017] In the opening and closing insert of the present invention, a box body is provided which is integrally formed with the box rod and has a storage space capable of accommodating a part of the butterfly rod, and the claw portion which is a part of the stop claw body is arranged in the width direction of the slider body of the slider so as to be insertable into and removable from the element guide path of the slider body at a position offset to one side in the width direction from the center position of the slider body, and when the slider is in contact with the box body, the claw portion is preferably held in contact with the bottom surface of the claw insertion passage of the butterfly rod or the bottom surface of the step of the side step provided on the opposing side edge of the butterfly rod.

[0018] In the opening and closing fastening device of the present invention, two sliders are attached to the second fastener stringer with their rear openings facing each other, the box bar has a slider stopper portion that abuts against and stops one of the sliders, and a receiving recess provided on one side of the box bar in the thickness direction and for inserting and accommodating a part of the stopping claw body of one of the sliders, the receiving recess opens on the opposing side edge of the box bar facing the hinge bar, and the claw portion which is a part of the stopping claw body is in the width direction of the slider body of the slider Furthermore, the slider body is positioned at a location offset to one side in the width direction from the center of the slider body so as to be insertable into and removable from the element guide path of the slider body, and in a state in which one slider is in contact with the slider stopper of the box bar and the other slider is in contact with the one slider, the claw portion of the other slider may be held in contact with the bottom surface of the claw insertion passage of the butterfly bar or the bottom surface of the step of the side step provided on the opposing side edge of the butterfly bar.

[0019] In this case, the butterfly rod has a tip inclined surface provided at the corner of the tip of the butterfly rod that faces the box rod, and it is preferable that the tip inclined surface of the butterfly rod slopes downward so as to gradually reduce the thickness of the butterfly rod in the length direction and the width direction. [Effects of the Invention]

[0020] According to the separating and inserting tool of the present invention, for the right-inserting type separating and inserting tool and the left-inserting type separating and inserting tool, sliders with a stop mechanism having the same structure can be used. Further, even when using sliders with the same structure for the right-inserting type and the left-inserting type, when sliding the slider after inserting the toggle bar, it is possible to make it difficult for the claw portion of the slider to catch on the toggle bar.

Brief Description of the Drawings

[0021] [Figure 1] It is a partial cross-sectional view schematically showing the separating and inserting tool according to Embodiment 1 of the present invention. [Figure 2] It is a plan view schematically showing the toggle bar of the separating and inserting tool shown in FIG. 1. [Figure 3] It is a side view of the toggle bar shown in FIG. 2 as viewed from the inner side in the width direction. [Figure 4] It is a bottom view of the toggle bar shown in FIG. 2. [Figure 5] It is a front view of the toggle bar shown in FIG. 2 as viewed from the fastener element side. [Figure 6] It is a perspective view schematically showing a part of the slider used in the separating and inserting tool shown in FIG. 1. [Figure 7] It is a partial cross-sectional view schematically explaining the operation of inserting the toggle bar into the slider. [Figure 8] It is a cross-sectional view schematically showing the positional relationship between the toggle bar and the claw portion of the stop claw body in the state shown in FIG. 7. [Figure 9] It is a partial cross-sectional view schematically showing a state where a part of the toggle bar is inserted into the accommodation space portion of the box body. [Figure 10] It is a partial cross-sectional view schematically showing a state where the slider is held at a position away from the box body. [Figure 11] It is a perspective view schematically showing an enlarged view of the claw insertion passage of the toggle bar and the claw portion of the stop claw body in the state shown in FIG. 10. [Figure 12] It is a partial cross-sectional view schematically showing the separating and inserting tool according to Embodiment 2 of the present invention. [Figure 13] Figure 12 is a schematic plan view showing the butterfly pin of the detachable fitting device. [Figure 14] Figure 13 is a side view of the hinge bar as seen from the inside in the width direction. [Figure 15] Figure 13 is a bottom view of the butterfly bar. [Figure 16] Figure 12 is a schematic plan view showing the box rod of the opening and closing fitting device. [Figure 17] Figure 16 is a side view of the box bar as seen from the inside in the width direction. [Modes for carrying out the invention]

[0022] The inventors conducted research on the presence or absence of catching between the butterfly pin and the claw portion of the slider when operating a slider with a stopping mechanism, and the causes thereof, when using it with a right-insertion type opening / closing device and when using it with a left-insertion type opening / closing device.

[0023] As a result, for example, in a slider with a stop mechanism used in a right-insertion type release insert, the claw portion forming the stop mechanism is often positioned to the right of the center position in the slider width direction within the element guide path of the slider body. Therefore, it was found that when this right-insertion type slider is used in a left-insertion type release insert, when the butterfly pin is inserted into the slider, the claw portion of the slider is positioned below the base insertion portion provided on the butterfly pin, making it easier for the slider to catch on the butterfly pin.

[0024] Furthermore, it was found that when the slider is slid in the element closing direction after the butterfly rod is inserted, the claw portion of the slider catches on or rubs strongly against the base insertion portion of the butterfly rod or its vicinity, and that this catching or strong rubbing of the claw portion against the butterfly rod reduces the sliding performance (start performance) of the slider at the beginning of its sliding motion.

[0025] Therefore, the present inventors conducted various experiments and studies to improve the sliding performance (especially the starting performance) of the slider after inserting the butterfly pin when using a slider formed for right-insertion type in a left-insertion type opening and closing insert. As a result, they found that interference between the claw portion and the butterfly pin can be eliminated or reduced by providing a claw insertion passage between the butterfly pin body and the base insertion portion of the butterfly pin, through which the claw portion of the stop claw body can pass, thus completing the present invention.

[0026] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings, using examples. [Examples]

[0027] Figure 1 is a schematic partial cross-sectional view showing the release fitting according to this embodiment 1. Figures 2 to 5 are a schematic top view, side view, bottom view, and front view showing the hinge of this embodiment 1, respectively. Figure 6 is a schematic perspective view showing a part of the slider of this embodiment 1. Note that in Figure 1 and Figures 7 and 8, which will be described later, the slider and the box body are shown in cross-section to clearly illustrate the features of the present invention.

[0028] In the following description of the slide fastener and release / removal fitting 1, the front-to-back direction is the direction along the length direction of the left and right fastener stringers, and also the direction along the sliding direction in which the slider 40 slides. In this case, with respect to the front-to-back direction, the direction in which the slider 40 slides in the direction of closing the slide fastener is defined as the front, and the direction in which the slider 40 slides in the direction of opening the slide fastener is defined as the rear.

[0029] The left-right direction is the direction that moves a pair of fastener stringers closer to or further apart from each other. The left-right direction can also be described as the tape width direction of the fastener tape. In this case, with respect to the left-right direction, the direction in which each 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. The tape width direction is the direction that is perpendicular to the thickness of the fastener tape and follows the tape surface or back surface of the fastener tape in a cross-sectional view perpendicular to the front-to-back direction of the fastener stringer.

[0030] 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. In this case, the side on which the stop claw body 50 (claw portion 52) of the slider 40 is positioned relative to the release insert 1 (especially the butterfly pin 10) is considered the upper side, and the opposite side is considered the lower side.

[0031] More specifically, in the case of the slide fastener and release / insertion device 1 of this embodiment 1, 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.

[0032] The slide fastener of this embodiment 1 is equipped with a forward-opening type (normal type) release insert 1 as shown in Figure 1. This release insert 1 is provided at the rear end of the slide fastener. The slide fastener of this embodiment 1 comprises a pair of left and right first fastener stringers (not shown) and a second fastener stringer (not shown), a slider 40 that can slide along the row of elements provided on each fastener stringer, a stopper member (not shown) positioned adjacent to the front ends of the left and right row of elements, and a butterfly bar 10, a box bar 20, and a box body 30 positioned adjacent to the rear ends of the left and right row of elements. The forward-opening type release insert 1 is formed by the butterfly bar 10, box bar 20, box body 30, and slider 40 of the slide fastener.

[0033] In the slide fastener of this embodiment 1, the first fastener stringer, the second fastener stringer, and the stopper member are formed substantially in the same manner as the fastener stringers and stopper members used in conventional slide fasteners.

[0034] For example, in this embodiment 1, the first fastener stringer located on the right side and the second fastener stringer located on the left side 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.

[0035] Multiple fastener elements are 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 40 is slidably attached.

[0036] 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.

[0037] 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.

[0038] The stopper members (not shown) of the slide fastener 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 sliding limit position on the front side of the slider 40 and prevents the slider 40 from falling off the front side of the element row.

[0039] As described above, the release insert 1 of this embodiment 1 includes a butterfly bar 10 provided on the right-side first fastener stringer (not shown), a box bar 20 and a box body 30 provided on the left-side second fastener stringer (not shown), and a slider 40 slidably attached to the element row of the second fastener stringer.

[0040] In the release fastener 1 of this embodiment 1, when the slide fastener is viewed from above, the butterfly pin 10 is arranged on the first fastener stringer on the right side, and the box pin 20 and box body 30 are arranged on the second fastener stringer on the left side. Therefore, the release fastener 1 of this embodiment 1 is formed as a left-insertion type release fastener 1 in which, when the slide fastener having the release fastener 1 is attached to, for example, clothing, the person wearing the clothing operates the butterfly pin 10 of the release fastener 1 with their left hand. In this left-insertion type release fastener 1, the slider 40 is attached to the element row of the second fastener stringer on the left side where the box pin 20 and box body 30 are provided.

[0041] In the slider 40 of this embodiment 1, the claw portion 52 of the stop claw body 50 provided on the slider 40 is positioned to the right of the center position in the width direction of the slider 40 within the element guide path of the slider body 41, for example as shown in Figure 1. With the claw portion 52 of the stop claw body 50 positioned in this way, when the slider 40 is used in a right-insertion type opening and closing insert, for example, when the butterfly pin is operated with the right hand, the claw portion 52 of the stop claw body 50 does not interfere with the butterfly pin 10 when the butterfly pin is grasped with the right hand and inserted into the slider 40 and the box body.

[0042] Therefore, even if the slider 40 of this embodiment 1 is used in a right-insertion type opening and closing insert, no problems will occur such as the butterfly pin 10 getting caught on the claw portion 52 of the slider 40 when inserting the butterfly pin 10 into the slider 40, or the claw portion 52 of the slider 40 getting caught on the butterfly pin when sliding the slider 40 after the butterfly pin 10 has been inserted.

[0043] In this embodiment 1, the slider 40 can engage the right-side row of elements on the first fastener stringer with the left-side row of elements on the second fastener stringer by sliding the slider 40 away from the box body 30 (element closing direction). Furthermore, the slider 40 can separate the left and right row of elements by sliding the slider 40 closer to the box body 30 (element separation direction).

[0044] The slider 40 comprises a slider body 41, a stop claw body 50 mounted on the slider body 41, a cover body (not shown) that covers the stop claw body 50 from above and is fixed to the slider body 41, and a pull handle (not shown) whose shaft is attached and held between the slider body 41 and the cover body. In this slider 40, the stop claw body 50 is pivotably mounted on the slider body 41 within the cover body.

[0045] The slider fuselage 41 includes an upper wing plate 42, a lower wing plate 43 spaced apart from the upper wing plate 42, a connecting column 44 connecting the front ends (shoulder ends) of the upper wing plate 42 and the lower wing plate 43, upper and lower flange portions 45 located on the left and right side edges of the upper wing plate 42 and the lower wing plate 43, and front and rear cover mounting portions 46 protruding upward from the upper wing plate 42. The upper end of the front cover mounting portion 46 is provided with a projection 46a that is inserted into a mounting opening 54 of the stop claw body 50, which will be described later.

[0046] The front end of the slider fuselage 41 has left and right shoulders with a guide post in between, and the rear end of the slider fuselage 41 has a rear opening. Between the upper wing plate 42 and the lower wing plate 43, there is a roughly Y-shaped element guide path that connects the left and right shoulders and the rear opening. The slider fuselage 41 is provided with a claw hole 47 that penetrates vertically through the upper wing plate 42 and the rear cover mounting portion 46. Between the upper and lower flange portions 45 of the slider fuselage 41, there is an insertion gap through which a fastener tape is inserted.

[0047] The stop claw body 50 is formed by press-forming a metal plate material such as a copper alloy, and is sometimes called a lock pin. The stop claw body 50 has a claw body portion 51 which has a roughly C-shape when viewed from the side, a claw portion 52 which extends from the rear end of the claw body portion 51 with a reduced width, and an elastic biasing portion 53 which branches upward from the claw body portion 51.

[0048] The claw body portion 51 is formed with a constant width from its front end to its rear end. The claw body portion 51 has a substantially rectangular mounting opening 54 and a narrow opening that extends linearly rearward from the mounting opening 54. When the stop claw body 50 is placed on the slider body 41, a projection 46a provided on the slider body 41 is inserted into the mounting opening 54 of the claw body portion 51.

[0049] The claw portion 52 of the stop claw body 50 extends downward from the rear end of the claw body portion 51. The claw portion 52 is positioned in the left-right direction (slider width direction) relative to the slider body 41, offset to one side (the right side in this embodiment 1) from the center of the slider body 41. The claw portion 52 is positioned to be insertable into and removable from the element guide path of the slider body 41 via a claw hole 47 provided in the slider body 41. By being inserted into the element guide path of the slider body 41, the claw portion 52 engages with the row of elements of the first fastener stringer inserted into the element guide path. This activates the stop mechanism of the slider 40, locking the slider 40 so that it does not slide against the row of elements. In this embodiment 1, the stop claw body 50 is attached to the slider body 41 such that the claw portion 52 can move within a small range in the left-right direction within the element guide path.

[0050] The elastic biasing portion 53 of the stop claw body 50 elastically deforms to come into contact with the ceiling portion (upper wall portion of the cover) of the cover body and to approach the claw body portion 51 when the stop claw body 50 is mounted between the slider body 41 and the cover body. As a result, the elastic biasing portion 53 biases the claw body portion 51 downward, allowing the claw portion 52 to be inserted into the element guide path through the claw hole 47 of the slider body 41.

[0051] The cover body (not shown) of the slider 40 has a box-like shape with an opening at the bottom. The cover body is fixed to the front and rear cover mounting portions 46 of the slider body 41 by locally pressing several points on the cover body toward the front and rear cover mounting portions 46, causing plastic deformation, while the front and rear cover mounting portions 46 of the slider body 41 are housed in the internal space of the cover body.

[0052] The butterfly pin 10 of the release fitting 1 is formed by injection molding synthetic resin onto the fastener tape of the first fastener stringer. The butterfly pin 10 is provided adjacent to the rear end of the element row in the first fastener stringer and continuous with the element row. The butterfly pin 10 is fixed to the tape side edge of the fastener tape so as to straddle the upper and lower surfaces of the fastener tape. The butterfly pin 10 is formed to pass through the element guide path of the slider 40 and be housed in the housing space 32 of the box body 30, which will be described later.

[0053] The butterfly bar 10 has an upper half (first half) 10a of the butterfly bar located on the upper side (one 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) 10b of the butterfly bar located on the lower side (the other side) of the tape. With respect to the butterfly bar 10, in the front-rear direction, the end located on the side of the butterfly bar 10 closer to the fastener element is defined as the butterfly bar base end, and the end located on the side of the butterfly bar 10 further away from the fastener element is defined as the butterfly bar tip.

[0054] The butterfly bar 10 of this embodiment 1 includes a butterfly bar body portion 11 attached to the fastener tape, a first base end insertion portion 12 and a claw insertion passage 13 provided at the base end of the butterfly bar upper half portion 10a, a second base end insertion portion 14 provided at the base end of the butterfly bar lower half portion 10b, an upper side step portion 15, a lower side step portion 16, and an engagement recess 17 provided on the inner side edge portion (opposing side edge portion) of the butterfly bar 10 facing the box bar 20, and an element projection portion 18 that protrudes inward in the left-right direction from the base end of the butterfly bar body portion 11.

[0055] The butterfly bar body 11 is fixed to the fastener tape and has a long shape in the front-to-back direction. The butterfly bar body 11 has a butterfly bar upper surface (first surface) 11a facing upward and a butterfly bar lower surface (second surface) 11b facing downward, and the butterfly bar upper surface 11a and the butterfly bar lower surface 11b are each formed by flat surfaces perpendicular to each other in the vertical direction. The thickness dimension (vertical dimension) between the butterfly bar upper surface 11a and the butterfly bar lower surface 11b in the butterfly bar body 11 is set to be the same as the thickness dimension of the fastener element.

[0056] The upper half 10a and lower half 10b of the butterfly bar body 11 are provided with pin recesses 11c that are recessed from the upper surface 11a or lower surface 11b of the butterfly bar. In this embodiment 1, two pin recesses 11c are provided in both the upper half 10a and the lower half 10b of the butterfly bar. These pin recesses 11c are marks left by pins used to press down on the fastener tape in order to position it during injection molding of the butterfly bar 10. The two pin recesses 11c provided in the upper half 10a of the butterfly bar have inclined recess surfaces that slope upward from the bottom surface of the pin recess 11c toward the tip of the butterfly bar, gradually increasing the thickness dimension of the upper half 10a of the butterfly bar.

[0057] The first base end insertion portion 12 of the butterfly bar 10 is provided on the inner side edge in the left-right direction at the base end of the butterfly bar so that when the butterfly bar 10 is housed in the housing space 32 of the box body 30 and the left and right element rows are interlocked, at least a part of the first base end insertion portion 12 can be inserted between the box bar 20 provided on the left second fastener stringer and the fastener element adjacent to the box bar 20 (hereinafter referred to as the box bar adjacent element). Such a first base end insertion portion 12 is sometimes called the first half-element portion.

[0058] In this embodiment 1, the first base insertion portion 12 is positioned at the innermost part in the left-right direction in the upper half portion 10a of the butterfly bar, and is formed to protrude forward from the claw insertion passage 13. The first base insertion portion 12 has a shape that allows it to engage with the adjacent box bar element of the second fastener stringer when the left and right element rows are engaged (a shape that allows it to engage).

[0059] The upper surface of the first base insertion portion 12 is positioned lower than the upper surface 11a of the butterfly bar body portion 11 in the vertical direction (thickness direction). The first base insertion portion 12 is formed such that the maximum thickness of the first base insertion portion 12 is smaller than the maximum thickness of the second base insertion portion 14 provided on the lower half portion 10b of the butterfly bar.

[0060] Here, with respect to the butterfly bar 10, the lower position and the higher position in the vertical direction refer to the position close to the fastener tape and the position farther away from the fastener tape, respectively, in the vertical direction. Furthermore, in a side view of the butterfly bar 10 (Figure 3), the vertical dimension from the vertical center position of the butterfly bar 10 to the upper surface of the first base end insertion portion 12 is defined as the thickness dimension of the first base end insertion portion 12, and the vertical dimension from the aforementioned center position of the butterfly bar 10 to the lower surface of the second base end insertion portion 14 is defined as the thickness dimension of the second base end insertion portion 14.

[0061] As described above, the appearance of the butterfly rod 10 can be improved and its appearance quality enhanced by forming the first base insertion portion 12 such that its upper surface is lower than the upper surface 11a of the butterfly rod body portion 11, and / or by forming it such that the maximum thickness dimension is smaller than that of the second base insertion portion 14.

[0062] Furthermore, it is possible to obtain a good tactile sensation when the user touches the butterfly bar 10. Moreover, even if a strong external force is applied to the first base end insertion portion 12, it is possible to make it difficult for the first base end insertion portion 12 to deform. In this invention, the butterfly bar 10 may be formed such that the upper surface of the first base end insertion portion 12 is at the same position (height position) as the upper surface 11a of the butterfly bar body portion 11 in the vertical direction.

[0063] The claw insertion passage 13 of the butterfly bar 10 is provided at the base end of the butterfly bar and is also provided between the butterfly bar body portion 11 and the first base end insertion portion 12 in the left-right direction, along the front-rear direction. The claw insertion passage 13 is formed so that the claw portion 52 of the stop claw body 50 provided on the slider 40 can pass through. The claw insertion passage 13 has a passage bottom surface 13a and a pair of left and right passage side wall surfaces extending upward from the left and right side edges of the passage bottom surface 13a.

[0064] The bottom surface 13a of the claw insertion passage 13 is formed to allow contact with the claw portion 52 of the slider 40, and is smoothly continuous with the stepped bottom surface 15b of the upper side stepped portion 15, which will be described later, without forming any irregularities. In the vertical direction, this passage bottom surface 13a is positioned lower than the upper surface 11a of the butterfly bar body portion 11, and also lower than the upper surface of the first base end insertion portion 12. The front end edge of the claw insertion passage 13 has a shape that curves concavely to the rear in a plan view of the butterfly bar 10 (Figure 2).

[0065] The bottom surface 13a of the claw insertion passage 13 has a guide inclined surface that slopes downward in the direction approaching the fastener element of the first fastener stringer (forward) (see Figure 11). This guide inclined surface is formed to gradually reduce the thickness dimension of the upper half portion 10a of the butterfly bar toward the front. In this embodiment 1, the guide inclined surface is provided over the entire front-to-back direction of the bottom surface 13a of the passage, and also extends to the bottom surface 15b of the stepped portion 15 of the upper side stepped portion 15.

[0066] Because such a guide inclined surface is provided on the bottom surface 13a of the claw insertion passage 13, for example, when the slider 40 is held slightly away from the box body 30 as will be described later, when moving the hinge rod 10 forward to pull it out of the slider 40 (see Figures 10 and 11), the claw portion 52 of the slider 40 can be brought into contact with the bottom surface 13a (guide inclined surface) of the claw insertion passage 13 and lifted smoothly. This prevents the hinge rod 10 from getting caught on the claw portion 52 and allows the hinge rod 10 to be pulled out smoothly.

[0067] In this invention, the butterfly rod 10 may be formed such that the bottom surface 13a of the claw insertion passage 13 is parallel to the front-rear direction, for example, without providing a guide inclined surface in the claw insertion passage 13. Alternatively, the butterfly rod 10 may be formed such that the bottom surface 13a of the claw insertion passage 13 and the upper surface of the first base end insertion portion 12 form a single plane at the same height.

[0068] The claw insertion passage 13 is formed such that the distance between the left and right side walls of the passage (i.e., the passage width) is greater than the width dimension of the claw portion 52 of the slider 40. In this embodiment 1, the claw insertion passage 13 is formed such that the passage width of the claw insertion passage 13 increases as it moves away from the passage bottom surface 13a. This allows the claw portion 52 of the slider 40 to be smoothly inserted into the claw insertion passage 13 and to move smoothly in the front-rear direction within the claw insertion passage 13.

[0069] As shown in Figure 4, the second base end insertion portion 14 of the butterfly bar 10 is located on the inner side edge in the left-right direction at the base end of the butterfly bar in the lower half portion 10b of the butterfly bar. The second base end insertion portion 14 has a shape that is asymmetrical in the vertical direction with respect to the first base end insertion portion 12. When the left and right element rows are engaged, at least a part of the second base end insertion portion 14 is formed to be insertable between the box bar 20 of the second fastener stringer and the box bar adjacent element. In particular, the second base end insertion portion 14 in this embodiment has a shape that can engage with the box bar adjacent element. Such a second base end insertion portion 14 is sometimes called the second half-element portion.

[0070] The second base insertion portion 14 is formed such that, in a side view of the butterfly bar 10, the maximum thickness dimension is greater than that of the first base insertion portion 12. This improves the lateral tension strength of the slide fastener near the release fitting 1 when the left and right element rows are engaged.

[0071] Furthermore, since the first base insertion portion 12 is formed with a maximum thickness smaller than that of the second base insertion portion 14, the claw portion 52 of the slider 40 is less likely to catch on the first base insertion portion 12. In this invention, the first base insertion portion 12 and the second base insertion portion 14 may be formed with the same maximum thickness, or they may be formed in a symmetrical shape.

[0072] The upper side stepped portion 15 of the butterfly rod 10 is formed on the inner side edge of the upper half portion 10a of the butterfly rod so as to allow at least a part of the claw portion 52 of the slider 40 to be inserted into the butterfly rod 10, in order to allow the claw portion 52 of the slider 40 to move away from the butterfly rod 10 (or to prevent it from interfering with the butterfly rod 10) (see Figures 2, 3, 8, etc.).

[0073] In this embodiment 1, the upper side stepped portion 15 is continuous with the claw insertion passage 13. The upper side stepped portion 15 extends continuously in the front-to-back direction from the claw insertion passage 13 to the tip of the butterfly bar (rear end), curving in the left-to-right direction. In this invention, the butterfly bar 10 may be formed with a portion of the inner side edge of the upper half portion 10a of the butterfly bar in which the upper side stepped portion 15 is not formed.

[0074] The upper side stepped portion 15 has a stepped side wall surface 15a formed vertically along the upper surface 11a of the butterfly bar body portion 11 via a bent portion, and a stepped bottom surface 15b formed horizontally along the left-right direction. The stepped bottom surface 15b is connected to the lower end of the stepped side wall surface 15a via a bent portion.

[0075] The stepped side wall surface 15a of the upper side stepped portion 15 is smoothly continuous with one of the passage side walls in the nail insertion passage 13. The stepped bottom surface 15b of the upper side stepped portion 15 is smoothly continuous with the passage bottom surface 13a of the nail insertion passage 13, and the stepped bottom surface 15b and the passage bottom surface 13a are formed as a flat, continuous surface without irregularities. The stepped bottom surface 15b of the upper side stepped portion 15 is smoothly continuous with the upper surface of the first base insertion portion 12, and the stepped bottom surface 15b and the upper surface of the first base insertion portion 12 are formed as a flat, continuous surface without irregularities.

[0076] Because such an upper side step portion 15 is provided on the inner side edge of the upper half portion 10a of the butterfly rod, when the butterfly rod 10 is inserted into the slider 40, for example as shown in Figure 8, at least a part of the claw portion 52 can be inserted into the space formed in the upper side step portion 15 of the butterfly rod 10, making it difficult for the butterfly rod 10 to come into contact with the claw portion 52 of the slider 40. In particular, it is difficult for the butterfly rod 10 to come into contact with the claw portion 52 from the side.

[0077] This prevents the claw portion 52 from obstructing the movement of the butterfly rod 10 as it is inserted into the box body 30. It also prevents frictional resistance from occurring between the butterfly rod 10 and the claw portion 52 (or reduces the frictional resistance that occurs between the butterfly rod 10 and the claw portion 52). As a result, the insertion operation of the butterfly rod 10 can be performed smoothly and easily.

[0078] The upper side stepped portion 15 has a constant width section where the width dimension W1 of the step bottom surface 15b is constant. Here, the width dimension W1 of the step bottom surface 15b is the left-right dimension from the step side wall surface 15a of the upper side stepped portion 15 to the inner end surface of the hinge rod 10, as shown in Figure 8, for example.

[0079] In this embodiment 1, the constant-width portion of the upper side stepped portion 15 is provided over a range of 50% or more of the butterfly rod 10 in the front-rear direction. Furthermore, the constant-width portion of the upper side stepped portion 15 is formed continuously from at least the central position in the front-rear direction of the butterfly rod 10 to the tip of the butterfly rod. This allows at least a portion of the claw portion 52 to be easily and stably inserted into the upper side stepped portion 15. In addition, it prevents the butterfly rod body portion 11 from becoming too thin, allowing the butterfly rod 10 to stably possess appropriate strength.

[0080] The upper side stepped portion 15 has a width increasing portion 15c that gradually increases the width W1 of the stepped bottom surface 15b toward the base end of the butterfly rod. This makes it easier to place the claw portion 52 of the stop claw body 50 on the stepped bottom surface 15b of the width increasing portion 15c when inserting the butterfly rod 10 into the storage space 32 of the box body 30. In addition, by installing the width increasing portion 15c, the width dimension of the first base end insertion portion 12 can be appropriately secured, thereby increasing the strength of the first base end insertion portion 12. Furthermore, a claw insertion passage 13 for inserting the claw portion 52 of the slider 40 can be stably provided between the butterfly rod body portion 11 and the first base end insertion portion 12.

[0081] In this embodiment 1, the width-increasing portion 15c is provided in the range closer to the base end of the butterfly bar 10 than the central position in the front-rear direction of the butterfly bar 10 (i.e., the front half of the butterfly bar 10). The width-increasing portion 15c is provided in the formation range where the engagement recess 17 of the butterfly bar 10 is formed, with respect to the front-rear direction. As a result, the base end of the butterfly bar 10 can be made larger in the left-right direction, so that the claw insertion passage 13 can stably have an appropriate width dimension that allows the claw portion 52 to pass through. In addition, since the rear half of the butterfly bar 10 can be made thinner, the butterfly bar 10 can be smoothly and stably inserted into the housing space 32 of the box body 30 via the element guide path of the slider 40.

[0082] In the butterfly bar 10 of this embodiment, the upper surface of the first base end insertion portion 12 is positioned higher than the bottom surface 15b of the step portion 15 of the upper side step portion 15 at the tip of the butterfly bar, in the vertical direction. Furthermore, the bottom surface 15b of the step portion 15 of the upper side step portion 15 has a thickened inclined surface 15d that slopes upward toward the front or toward the first base end insertion portion 12. This thickened inclined surface 15d is provided in the formation range where the engagement recess 17 of the butterfly bar 10 is formed, in the front-rear direction, and in particular, in the formation range where the width gradually increasing portion 15c is formed.

[0083] Because such a thickened inclined surface 15d is provided on the stepped bottom surface 15b of the upper side stepped portion 15, the stepped bottom surface 15b of the upper side stepped portion 15 can be made to be smoothly continuous with respect to the upper surface of the first base end insertion portion 12 without forming any irregularities. Furthermore, when the butterfly rod 10 is viewed from the inside in the left-right direction (see Figure 3), the thickness between the stepped bottom surface 15b of the upper side stepped portion 15 and the inner wall surface of the engagement recess 17 on the butterfly rod 10 can be increased, thereby increasing the strength of the first base end insertion portion 12 and its vicinity.

[0084] The lower side stepped portion 16 of the butterfly bar 10 is formed on the inner side edge of the lower half portion 10b of the butterfly bar, as shown in Figures 3 and 4, for example, and extends in the front-rear direction. The lower side stepped portion 16 extends continuously in the front-rear direction from a position adjacent to the lower side of the second base end insertion portion 14 to the tip portion (rear end) of the butterfly bar.

[0085] The lower side stepped portion 16 has a stepped side wall surface formed vertically along the lower surface of the butterfly bar body portion 11 via a bent portion, and a stepped bottom surface formed horizontally along the left-right direction. The stepped bottom surface is connected to the upper end of the stepped side wall surface via a bent portion. Because such a lower side stepped portion 16 is provided on the butterfly bar 10, the butterfly bar 10 of this embodiment 1 can be used, for example, in a right-insertion type opening and closing insert that is operated with the user's right hand, thereby improving the versatility of the butterfly bar 10.

[0086] The engaging recess 17 of the butterfly rod 10 is formed in the center of the butterfly rod 10 in the vertical direction, corresponding to the engaging projection 22 of the box rod 20 (described later), and is formed to recess outward in the left-right direction from the inner side wall surface of the butterfly rod 10. When the butterfly rod 10 is inserted into the housing space 32 of the box body 30 and housed there, the engaging projection 22 of the box rod 20 is inserted into this engaging recess 17 of the butterfly rod 10. This makes it easy to position the butterfly rod 10 relative to the box rod 20 and the box body 30.

[0087] The element projection 18 of the butterfly bar 10 protrudes inward from the butterfly bar body 11 in the left-right direction at the base end of the butterfly bar. The element projection 18 is located in the center of the butterfly bar 10 in the vertical direction. When the first base end insertion portion 12 and the second base end insertion portion 14 of the butterfly bar 10 are engaged with the box bar adjacent element of the second fastener stringer, the element projection 18 of the butterfly bar 10 is inserted into an insertion recess provided on the engagement head of the box bar adjacent element.

[0088] The box rod 20 and box body 30 forming the release insert 1 of this embodiment 1 are fixed to the fastener tape of the second fastener stringer by injection molding of synthetic resin onto the fastener tape. The box rod 20 and the box body 30 are integrally formed with each other. The box rod 20 and the box body 30 are fixed to the side edge of the fastener tape so as to straddle the upper and lower surfaces of the fastener tape. The box rod 20 is provided adjacent to the rear end of the element row in the second fastener stringer and continuous with the element row.

[0089] The box bar 20 is formed such that, when the butterfly bar 10 is inserted into and housed in the housing space 32 of the box body 30, the base end of the box bar 20, which is closest to the fastener element, is positioned in the front-rear direction further back (closer to the box body 30) than the base end of the butterfly bar 10 housed in the box body 30. The box bar 20 has a box bar body portion 21 that is fixed to the fastener tape, and an engaging projection portion 22 that protrudes inward from the box bar body portion 21 in the left-right direction.

[0090] The box rod body portion 21 has a roughly rectangular parallelepiped shape that is elongated in the front-to-back direction. The upper and lower halves of the butterfly rod body portion 11 each have one pin recess 23 that is recessed from the upper or lower surface of the box rod 20. The upper and lower pin recesses 23 on the box rod 20 are, like the pin recess 11c of the butterfly rod 10, marks left by the pins pressing down during the injection molding of the box rod 20.

[0091] The engaging projection 22 of the box bar 20 protrudes inward in the left-right direction from the inner side surface of the box bar body 21 in a roughly triangular shape. The engaging projection 22 is formed with a thickness that allows it to be inserted into the engaging recess 17 provided in the butterfly bar 10.

[0092] The box body 30 has a box body main body portion 31 integrally formed at the tip of the box rod 20, and a storage space portion 32 and an auxiliary space portion 33 formed in the box body main body portion 31. The box body main body portion 31 has a roughly rectangular parallelepiped shape in which the length dimension (dimension in the front-to-back direction) is larger than the width dimension. The box body main body portion 31 is formed with a larger width dimension and thickness dimension (dimension in the vertical direction) than the box rod main body portion 21, and a step is formed between the box rod main body portion 21 and the box body main body portion 31, allowing the slider 40 to be brought into contact with it.

[0093] The storage space 32 of the box body 30 is sized to accommodate and hold a portion of the hinge rod 10, and is provided to extend straight from the front to the rear of the box body 31. For example, in this embodiment 1, the storage space 32 is formed along the front-to-back direction, and is also formed to accommodate at least one-third of the length of the hinge rod 10 from the tip of the hinge rod in the front-to-back direction. The auxiliary space 33 of the box body 30 is formed extending forward from the rear surface of the main body 31 of the box body and is in communication with the storage space 32. The auxiliary space 33 is formed such that the area of ​​the cross-section perpendicular to the front-rear direction is smaller than that of the storage space 32.

[0094] Next, the operation of engaging the element rows of the first and second fastener stringers, which are separated from each other, using the opening and closing fitting tool 1 of this embodiment 1, which is formed as a forward-opening and left-insertion type, will be explained with reference to Figures 7 to 9.

[0095] First, by grasping the pull handle (not shown) of the slider 40 and pulling it, the slider 40 is slid to the rear sliding end position where it contacts the box body 30, as shown in Figure 7, and stopped. In this embodiment 1, the slider 40 is fitted with a stop claw body 50, as shown in Figure 6. Therefore, when the slider 40 is stopped at the rear sliding end position and the operation of the pull handle is completed, the elastic force of the elastic biasing portion 53 of the stop claw body 50 causes the claw portion 52 of the stop claw body 50 to automatically protrude into the element guide path of the slider body 41 (see Figure 7).

[0096] After holding the slider 40 in contact with the box body 30, the butterfly pin 10 of the release fitting tool 1 is inserted from the right shoulder of the slider 40 through the element guide path of the slider 40 toward the housing space 32 of the box body 30.

[0097] In the opening and closing inserting device 1 of this embodiment 1, when the butterfly rod 10 is inserted toward the storage space 32 of the box body 30, the tip of the butterfly rod 10 approaches the claw portion 52 that protrudes into the element guide path of the slider body 41, and further moves backward beyond the position of the claw portion 52, as shown in Figure 9, thereby inserting the butterfly rod 10 into the storage space 32 of the box body 30.

[0098] At this time, as shown in Figure 8, a portion of the claw portion 52 of the stop claw body 50 is inserted into the space formed in the upper side stepped portion 15 of the butterfly bar 10. Furthermore, the claw portion 52 inserted into the space in the upper side stepped portion 15 moves relative to the butterfly bar 10, which is moving backward, while passing through the space in the upper side stepped portion 15, toward the base end of the butterfly bar 10.

[0099] In this case, at least halfway along the front-to-back direction of the butterfly rod 10, the claw portion 52 passes through the space of the upper side stepped portion 15 while floating above the bottom surface 15b of the step of the upper side stepped portion 15 (in other words, a gap is formed between the claw portion 52 and the bottom surface 15b of the step of the upper side stepped portion 15). This makes it difficult for the butterfly rod 10 to come into contact with the claw portion 52 of the stop claw body 50 when inserting the butterfly rod 10, allowing the insertion of the butterfly rod 10 to be performed easily and smoothly.

[0100] Furthermore, in this embodiment 1, the claw portion 52 of the stop claw body 50 is provided to be slightly movable in the left-right direction within the element guide path of the slider body 41, as described above. For example, if the claw portion 52 of the stop claw body 50 is held at the right end of the range of movement within the element guide path, then, as shown in Figure 7, when the butterfly rod 10 is inserted into the slider 40, the claw portion 52 can be inserted into the space of the upper side step portion 15 at or near the tip of the butterfly rod 10. Subsequently, the claw portion 52 can be moved along the upper side step portion 15 toward the base end of the butterfly rod 10.

[0101] On the other hand, if the claw portion 52 of the stop claw body 50 is held, for example, at the left end of the range that can move within the element guide path, then when the butterfly rod 10 is inserted into the slider 40, the claw portion 52 can be inserted into the space of the upper side step portion 15 at a position forward of the tip of the butterfly rod 10, and can also be moved along the upper side step portion 15.

[0102] In other words, in the butterfly rod 10 of this embodiment 1, the upper side stepped portion 15 is formed to extend continuously in the front-rear direction from the claw insertion passage 13 to the tip of the butterfly rod, as described above. As a result, even if the claw portion 52 of the stop claw body 50 is provided to be movable from side to side within the element guide path, when the butterfly rod 10 is inserted into the slider 40, the claw portion 52 of the slider 40 can be stably inserted into the space of the upper side stepped portion 15. Therefore, it is difficult for the butterfly rod 10 to come into contact with the claw portion 52, and the smooth insertion operation of the butterfly rod 10 can be stably performed.

[0103] Next, as the butterfly rod 10 moves further rearward, the claw portion 52 inserted into the space of the upper side stepped portion 15 moves into the width-increasing portion 15c of the upper side stepped portion 15 or into the claw insertion passage 13, as shown in Figure 1. At this time, the width-increasing portion 15c of the upper side stepped portion 15 is formed with a larger width dimension W1 of the step bottom surface 15b compared to the constant width portion of the upper side stepped portion 15, and also has a thickened inclined surface 15d that slopes upward toward the front. This allows the claw portion 52 of the stop claw body 50 to be stably moved into the width-increasing portion 15c of the upper side stepped portion 15 or the claw insertion passage 13, and to be held in contact with the step bottom surface 15b of the upper side stepped portion 15 or the passage bottom surface 13a of the claw insertion passage 13.

[0104] After the butterfly bar 10 is properly housed and held in the storage space 32 of the box body 30, the slider 40, which is in contact with the box body 30, is slid forward (away from the box body 30). This allows the left and right fastener elements to engage sequentially from the rear.

[0105] Furthermore, in the opening and closing insert 1 of this embodiment 1, when the slider 40 starts to slide as described above, the claw portion 52 of the slider 40 is held by the width increasing portion 15c of the upper side stepped portion 15 of the butterfly rod 10 or the bottom surface 13a of the claw insertion passage 13. Therefore, by sliding the slider 40 away from the box body 30, the claw portion 52 of the slider 40 moves forward relative to the butterfly rod 10 from the width increasing portion 15c of the butterfly rod 10 or the claw insertion passage 13.

[0106] At this time, at the base end of the butterfly bar 10, a claw insertion passage 13 is provided between the butterfly bar body 11 and the first base end insertion portion 12, and the bottom surface 13a of the claw insertion passage 13 is positioned lower in the vertical direction than the upper surface 11a of the butterfly bar body 11 and the upper surface of the first base end insertion portion 12. Furthermore, the upper surface of the first base end insertion portion 12 is positioned lower in the vertical direction than the upper surface 11a of the butterfly bar body 11 and is formed continuously from the bottom surface 15b of the step portion 15 of the upper side step portion 15.

[0107] Therefore, when the slider 40 slides forward, even if the claw portion 52 of the stop claw body 50 protrudes into the element guide path of the slider body 41, the claw portion 52 can pass over at least one of the claw insertion passage 13 and the first base end insertion portion 12 of the butterfly rod base end, preferably over the claw insertion passage 13 of the butterfly rod base end, and move smoothly to the front side of the butterfly rod 10. As a result, the slider 40 can slide smoothly forward without the claw portion 52 of the slider 40 getting caught on the first base end insertion portion 12 of the butterfly rod 10.

[0108] In particular, by passing the claw portion 52 of the slider 40 through the claw insertion passage 13, which is formed lower than the first base insertion portion 12 of the base end of the butterfly rod, the claw portion 52 of the slider 40 can be moved to the front side of the butterfly rod 10 without having to lift it significantly against the elastic force of the elastic biasing portion 53 of the stop claw body 50, thus allowing the sliding of the slider 40 to start more smoothly.

[0109] Subsequently, by sliding the slider 40 along the left and right rows of elements until it contacts, for example, a stopper adjacent to the front end of the row of elements, the left and right rows of elements can be engaged over their entire length in the front-to-back direction, thereby allowing the slide fastener to be closed.

[0110] Next, we will describe the case where the left and right rows of elements are separated from their interlocked state, thereby pulling apart the first fastener stringer and the second fastener stringer. In this case, first, the slider 40 is moved along the left and right rows of elements to the sliding rear end position where it contacts the box body 30. This allows the left and right rows of elements to be completely separated.

[0111] Subsequently, the butterfly rod 10 is pulled to escape from the storage space 32 of the box body 30, moving forward relative to the box rod 20 and the box body 30. This causes the butterfly rod 10 to be pulled out of the storage space 32 of the box body 30 via the element guide path of the slider 40. At this time, the claw portion 52 of the slider 40 can move to the tip of the butterfly rod 10 through the space of the upper side stepped portion 15 provided on the butterfly rod 10, so the butterfly rod 10 can be smoothly pulled out of the slider 40 without getting caught on the claw portion 52.

[0112] Then, by pulling the butterfly bar 10 out of the slider 40, the butterfly bar 10 can be separated from the box bar 20 and the box body 30, thereby separating the first fastener stringer having the butterfly bar 10 from the second fastener stringer having the box bar 20 and the box body 30.

[0113] Furthermore, for example, when a slide fastener equipped with the release insert 1 of this embodiment 1 is attached to a product such as clothing and used, when the butterfly pin 10 is pulled out of the storage space 32 of the box body 30, the slider 40 may be held at a position slightly away from the box body 30, as shown in Figure 10.

[0114] In this case, since the slider 40 is positioned away from the box body 30, the claw portion 52 of the slider 40 is held in a position further forward from the butterfly rod 10, compared to the state shown in Figure 1 where the slider 40 is in contact with the box body 30, for example, so as to hinder the movement of the butterfly rod 10 in the pulling direction (see Figures 10 and 11).

[0115] In such cases, the butterfly bar 10 of this embodiment 1 has a guide inclined surface formed on the bottom surface 13a of the claw insertion passage 13 provided at the base end of the butterfly bar, which slopes downward toward the front (towards the fastener element). Because this guide inclined surface is provided in the claw insertion passage 13, even if the claw portion 52 of the slider 40 is located in front of the position of the width increasing portion 15c of the upper side step portion 15, when the butterfly bar 10 is pulled out of the storage space portion 32 of the box body 30, the claw portion 52 of the slider 40 can pass through the claw insertion passage 13 while being lifted by the guide inclined surface of the bottom surface 13a of the passage.

[0116] Therefore, according to the release insert 1 of this embodiment 1, even when the slider 40 is held at a position away from the box body 30 when the butterfly rod 10 is pulled out of the box body 30, the claw portion 52 of the slider 40 is prevented or suppressed from catching on the butterfly rod 10, allowing the butterfly rod 10 to be pulled out smoothly and stably.

[0117] As described above, in the release insert 1 of this embodiment 1, it is possible to form a left-insertion type release insert 1 using a slider 40 formed for a right-insertion type release insert 1. This reduces the number of types of sliders 40 that can be used for both right-insertion type and left-insertion type release insert 1, thereby reducing manufacturing costs, improving productivity and manufacturing efficiency, and simplifying quality control and process control.

[0118] Furthermore, in the release fitting device 1 of this embodiment 1, a claw insertion passage 13 is formed at the base end of the butterfly rod 10, having a passage bottom surface 13a that is lower than the upper surface 11a of the butterfly rod body 11. Therefore, even if a left-insertion type release fitting device 1 is formed using a right-insertion type slider 40, when the slider 40 is slid forward after the butterfly rod 10 is inserted, the claw portion 52 of the slider 40 can pass over the claw insertion passage 13 or the first base end insertion portion 12 (preferably over the claw insertion passage 13), making it less likely for the claw portion 52 of the slider 40 to catch on the butterfly rod 10. As a result, the slider 40 can be slid smoothly, improving the sliding properties and starting properties of the slider 40.

[0119] Furthermore, in the opening and closing insert 1 of this embodiment 1, an upper side step portion 15 is continuously provided in the front-rear direction on the inner side edge of the butterfly bar 10. Therefore, when inserting the butterfly bar 10 into the storage space 32 of the box body 30 via the element guide path of the slider 40, as described above, the claw portion 52 of the slider 40 can move relative to the base end of the butterfly bar 10 through the space portion of the upper side step portion 15 on the butterfly bar 10. Therefore, it is difficult to bring the butterfly bar 10 into contact with the claw portion 52, and the butterfly bar 10 can be smoothly and stably inserted into the storage space 32 of the box body 30.

[0120] In this embodiment 1, the release insert 1 may be formed using a slider such as the one described in Patent Document 1, instead of the right-insertion type slider 40 shown in Figure 6. The slider described in Patent Document 1 has a claw portion used for the stopping mechanism integrally provided on the cover body, and the cover body is pivotably attached to the slider body. In the following description, such a slider will be referred to as a cover-movable type slider.

[0121] When a cover-type slider, such as the one described in Patent Document 1, is formed as a right-insertion type slider, for example, as shown by dashed lines in Figure 1, the claw portion 52a provided on the cover body of the cover-type slider is formed to be larger in size (particularly in the size of the cross-section perpendicular to the vertical direction of the claw portion 52a) compared to the claw portion 52 of the slider 40 in Example 1. Furthermore, the claw portion 52a of the cover-type slider is positioned further rearward and further to the right compared to the claw portion 52 of the slider 40 in Example 1.

[0122] In the present invention, a modified version of the opening and closing fitting device according to Example 1 may be formed using the butterfly rod 10, box rod 20, and box body 30 of Example 1, and a cover-movable slider having the claw portion 52a as described above. Even with such a modified version of the opening and closing fitting device, a left-insertion type opening and closing fitting device can be formed using a cover-movable slider for right-insertion type, thereby reducing the number of sliders that can be used for the opening and closing fitting device.

[0123] Furthermore, in this modified version of the detachable inserting device, when the butterfly rod 10 is housed in the box body 30, the claw portion 52a of the movable cover slider is positioned on the upper surface 11a of the butterfly rod body 11 at a location biased to the right within the element guide path. Therefore, when sliding the slider after inserting the butterfly rod 10, the slider can be slid smoothly without the claw portion 52a of the slider interfering with the first base end insertion portion 12 of the butterfly rod 10.

[0124] Furthermore, in the present invention, as shown in Example 1 and its modified form, by using the butterfly rod 10, box rod 20, and box body 30 of Example 1, the detachable fitting device 1 can be formed using the slider 40 shown in Figure 6, and the detachable fitting device can also be formed using the cover-movable slider described in the modified form. This improves the versatility of the butterfly rod 10, box rod 20, and box body 30, and makes it possible to further reduce the cost of the detachable fitting device. [Examples]

[0125] Figure 12 is a schematic partial cross-sectional view showing the release fitting according to this embodiment 2. Figures 13 to 15 are schematic top view, side view, and bottom view of the butterfly bar of this embodiment 2, respectively. Figures 16 and 17 are schematic top view and side view of the box bar of this embodiment 2, respectively.

[0126] The slide fastener in this embodiment 2 is provided with a reverse-opening type release insert 2, which is located at the rear end of the slide fastener. In this embodiment 2 of the slide fastener, which is provided with a reverse-opening type release fitting 2, the first slider 40a, described later, is positioned such that the direction in which it slides to close the slide fastener is forward, and the direction in which it slides to open the slide fastener is backward.

[0127] The slide fastener of this embodiment 2 includes a pair of left and right first fastener stringers (not shown) and a second fastener stringer (not shown), a first slider (front slider) 40a and a second slider (rear slider) 40b that are slidable along the row of elements provided on each fastener stringer, a stopper member (not shown) positioned adjacent to the front end of the left and right row of elements, and a butterfly bar 60 and a box bar 70 positioned adjacent to the rear end of the left and right row of elements.

[0128] The reverse-opening type release insert 2 of this embodiment 2 is formed by a slider fastener consisting of a butterfly bar 60, a box bar 70, a first slider 40a, and a second slider 40b. In this embodiment 2, the first fastener stringer, the second fastener stringer, and the fastening member are formed substantially in the same manner as the first fastener stringer, the second fastener stringer, and the fastening member of embodiment 1 described above.

[0129] In the release fastener 2 of this embodiment 2, when the slide fastener is viewed from above, a butterfly bar 60 is provided on the first fastener stringer on the right side, and a box bar 70 is provided on the second fastener stringer on the left side. Therefore, the release fastener 2 of this embodiment 2 is formed as a left-hand type release fastener 2, so that when the slide fastener having the release fastener 2 is attached to, for example, clothing, the person wearing the clothing can operate the butterfly bar 60 of the release fastener 2 with their left hand.

[0130] The first slider 40a and the second slider 40b are each formed substantially in the same manner as the slider 40 of Embodiment 1 described above. The first slider 40a and the second slider 40b are attached to the element row of the second fastener stringer with their respective rear openings facing each other.

[0131] In this case, the first slider 40a is positioned further away from the slider stopper 74, which will be described later, provided on the box bar 70, than the second slider 40b. In other words, the second slider 40b is positioned closer to the slider stopper 74 than the first slider 40a. That is, in this embodiment 2, the second slider 40b is positioned as one slider that contacts and stops at the slider stopper 74 of the box bar 70, and the first slider 40a is positioned as the other slider that contacts and stops at the rear end of the second slider 40b. In this embodiment 2, for the first slider 40a and the second slider 40b, components and parts that are substantially the same as those of the slider 40 in embodiment 1 described above are represented by the same reference numerals as in embodiment 1, and their detailed explanation is omitted.

[0132] The first slider 40a and the second slider 40b of this embodiment 2 can also be used in a right-hand insertion type opening and closing insert that operates the butterfly pin 60 with the right hand. Furthermore, even when the first slider 40a and the second slider 40b are used in a right-hand insertion type opening and closing insert, it is possible to prevent or suppress the claw portion 52 of each slider from catching on the butterfly pin when sliding the first slider 40a and the second slider 40b after inserting the butterfly pin.

[0133] The butterfly pin 60 of the release fitting device 2 is formed by injection molding synthetic resin onto the fastener tape of the first fastener stringer. The butterfly pin 60 is provided adjacent to the rear end of the element row in the first fastener stringer and continuous with the element row. The butterfly pin 60 has an upper butterfly pin portion (first butterfly pin portion) 60a that is located 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 butterfly pin portion (second butterfly pin portion) 60b that is located on the lower surface side of the tape.

[0134] The butterfly bar 60 includes a butterfly bar body portion 61 attached to the fastener tape, a first base end insertion portion 62 and a claw insertion passage 63 provided at the base end of the butterfly bar upper half portion 60a, an upper side stepped portion 65 and an engaging recess 67 provided on the inner side edge of the butterfly bar 60 facing the box bar 70, an element projection portion 68 protruding inward in the left-right direction from the base end of the butterfly bar body portion 61, and an upper tip inclined surface 69a provided at the tip of the butterfly bar upper half portion 60a.

[0135] Furthermore, as shown in Figure 15, the lower half 60b of the butterfly rod 60 is provided with a second base end insertion portion 64 and a claw insertion passage 63 located at the base end of the butterfly rod, a lower tip inclined surface 69b located at the tip of the butterfly rod, a lower side step portion 66 located on the inner side edge of the butterfly rod 60, and a first claw receiving recess 81 located in the longitudinal center of the butterfly rod body portion 61.

[0136] The butterfly bar body 61 is fixed to the fastener tape and has a long shape in the front-to-back direction. The butterfly bar body 61 has a butterfly bar upper surface (first surface) 61a facing upward and a butterfly bar lower surface (second surface) 61b facing downward. The butterfly bar upper surface 61a of the butterfly bar body 61 is formed by flat surfaces perpendicular to the vertical direction.

[0137] The lower surface 61b of the butterfly bar body 61 has a first lower surface formed by a flat surface perpendicular to the vertical direction, and a second lower surface located behind the first lower surface. The first lower surface of the butterfly bar lower surface 61b extends from the base end of the butterfly bar to behind the center position in the front-rear direction of the butterfly bar 60. The second lower surface of the butterfly bar lower surface 61b is formed by an inclined surface that slopes to gradually reduce the thickness dimension of the butterfly bar body 61 toward the rear. The upper half 60a and lower half 60b of the butterfly bar body 61 are each provided with two pin recesses 61c that are recessed from the upper surface 61a or lower surface 61b of the butterfly bar.

[0138] The first base insertion portion 62 is positioned at the innermost part in the left-right direction in the upper half portion 60a of the butterfly bar, and has a shape that protrudes forward from the claw insertion passage 63 so that it can engage with the adjacent box bar element of the second fastener stringer when the left and right element rows are interlocked.

[0139] The upper surface of the first base insertion portion 62 is positioned lower than the upper surface 61a of the butterfly bar body portion 61 in the vertical direction (thickness direction). This improves the appearance of the butterfly bar 60 and enhances its external quality. It also makes it easier for the user to get a good feel when touching the butterfly bar 60. Furthermore, even if a strong external force is applied to the first base insertion portion 62, it is made less likely to deform.

[0140] The claw insertion passage 63 of the upper half portion 60a of the butterfly bar is provided at the base end of the butterfly bar, between the butterfly bar body portion 61 and the first base end insertion portion 62 in the left-right direction, and is positioned along the front-rear direction. The claw insertion passage 63 has a passage bottom surface 63a and a pair of left and right passage side wall surfaces extending upward from the left and right side edges of the passage bottom surface 63a. The passage bottom surface 63a of the claw insertion passage 63 is smoothly continuous with the stepped bottom surface 65b of the upper side stepped portion 65. In the vertical direction (thickness direction), this passage bottom surface 63a is positioned lower than the butterfly bar upper surface 61a of the butterfly bar body portion 61, and also lower than the upper surface of the first base end insertion portion 62. The front end edge of the claw insertion passage 63 has a shape that curves concavely backward in a plan view of the butterfly bar 60 (Figure 13).

[0141] The bottom surface 63a of the claw insertion passage 63 has a guide inclined surface that slopes downward toward the front. This guide inclined surface is provided over the entire length of the bottom surface 63a in the front-rear direction. As a result, similar to Embodiment 1 described above, when the first slider 40a is held slightly away from the second slider 40b, the claw portion 52 can be lifted by the bottom surface 63a (guide inclined surface) of the claw insertion passage 63 when the butterfly rod 60 is pulled out from the first slider 40a and the second slider 40b, so that the butterfly rod 60 can be pulled out smoothly.

[0142] The upper side stepped portion 65 of the butterfly bar 60 is provided behind the first base end insertion portion 62 and the claw insertion passage 63 in the upper half portion 60a of the butterfly bar, and is sized to allow the insertion of the claw portion 52 of the first slider 40a. The upper side stepped portion 65 is formed in a range of 20% or less of the overall length dimension of the butterfly bar 60 in the front-rear direction.

[0143] The upper side stepped portion 65 has a stepped side wall surface formed vertically along the bending portion from the upper surface 61a of the butterfly bar body portion 61, and a stepped bottom surface 65b formed horizontally along the left-right direction. The stepped bottom surface 65b of the upper side stepped portion 65 is formed to be continuous with the upper surface of the first base end insertion portion 62 and the bottom surface 63a of the claw insertion passage 63.

[0144] With the upper side stepped portion 65 provided, when the butterfly rod 60 is inserted into the element guide paths of the first slider 40a and the second slider 40b, the claw portion 52 of the first slider 40a can be inserted into the space formed by the upper side stepped portion 65 of the butterfly rod 60 and guided toward the claw insertion passage 63.

[0145] The upper side stepped portion 65 has a width increasing portion 65c that gradually increases the width dimension of the stepped bottom surface 65b toward the base end of the butterfly rod. In addition, the stepped bottom surface 65b of the upper side stepped portion 65 has a thickened inclined surface 65d that slopes upward toward the front or toward the first base end insertion portion 62 (see Figure 14). By providing this thickened inclined surface 65d, the strength of the first base end insertion portion 62 and its vicinity can be increased.

[0146] The upper tip inclined surface 69a of the butterfly rod 60 is provided at the corner located on the inside in the left-right direction of the tip of the butterfly rod in the upper half portion 60a of the butterfly rod. The upper tip inclined surface 69a is inclined so as to gradually reduce the thickness of the upper half portion 60a of the butterfly rod toward the rear and also gradually reduce the thickness of the upper half portion 60a of the butterfly rod toward the inside in the left-right direction. Because the upper tip inclined surface 69a is provided on the butterfly rod 60, when the butterfly rod 60 is inserted into the element guide path of the first slider 40a, the claw portion 52 of the first slider 40a can be brought into contact with the upper tip inclined surface 69a of the butterfly rod 60 and lifted.

[0147] The engaging recess 67 of the butterfly rod 60 corresponds to the engaging projection 72 of the box rod 70, which will be described later, and is formed in the central part of the butterfly rod 60 in the vertical direction, and is formed to recess outward in the left-right direction from the inner side wall surface of the butterfly rod 60. When the butterfly rod 60 is housed in the first slider 40a and the second slider 40b, the engaging projection 72 of the box rod 70 is inserted into this engaging recess 67. The element projection 68 of the butterfly rod 60 protrudes inward from the butterfly rod body 61 in the left-right direction at the base end of the butterfly rod, and is located in the center of the butterfly rod 60 in the vertical direction.

[0148] The second base end insertion portion 64, provided on the lower half 60b of the butterfly bar, is positioned on the inner side edge in the left-right direction at the base end of the butterfly bar, as shown in Figure 15. The second base end insertion portion 64 has a shape that allows it to engage with the box bar adjacent element of the second fastener stringer when the left and right element rows are interlocked.

[0149] The claw insertion passage 63 of the lower half portion 60b of the butterfly bar is provided at the base end of the butterfly bar, between the butterfly bar body portion 61 and the second base end insertion portion 64 in the left-right direction. The lower side stepped portion 66 is provided behind the second base insertion portion 64 and the claw insertion passage 63. The lower side stepped portion 66 has a stepped side wall surface formed vertically from the lower surface of the butterfly bar body portion 61 via a bent portion, and a stepped bottom surface 66b formed horizontally.

[0150] In the butterfly bar 60 of this embodiment 2, the lower surface of the second base insertion portion 64, the bottom surface 63a of the claw insertion passage 63, and the bottom surface 66b of the lower side stepped portion 66 form a continuous single flat surface, and are positioned lower (closer to the fastener tape) than the lower surface 61b of the butterfly bar body portion 61 in the vertical direction.

[0151] The lower tip inclined surface 69b is provided at the corner located on the inside in the left-right direction of the tip of the lower half of the butterfly bar 60b. The lower tip inclined surface 69b is inclined so as to gradually reduce the thickness of the lower half of the butterfly bar 60b toward the rear and toward the inside in the left-right direction. The first claw receiving recess 81 is formed so as to be recessed from the lower surface 61b of the lower half of the butterfly bar 60b.

[0152] By providing the aforementioned claw insertion passage 63, lower side step portion 66, lower tip inclined surface 69b, and first claw receiving recess 81 on the lower half portion 60b of the butterfly bar 60, the butterfly bar 60 of this embodiment 2 can be used not only with the left-insertion type opening and closing fitting tool 2 shown in Figure 12, but also with the right-insertion type opening and closing fitting tool in which the butterfly bar 60 is operated with the right hand.

[0153] This increases the versatility of the butterfly pin 60 and reduces the manufacturing cost of the detachable fastener. When using the butterfly pin 60 of this embodiment 2 in a right-insertion type detachable fastener 2, it is necessary to install the butterfly pin 60 shown in Figures 13 to 15 on the fastener tape of the left fastener stringer in an inverted shape. In this case, the claw portion 52 of the second slider 40b can be accommodated in the first claw receiving recess 81 of the butterfly pin 60, thereby holding the second slider 40b in place so that it does not slide.

[0154] The box bar 70 of the release insert 2 is formed by injection molding synthetic resin onto the fastener tape of the second fastener stringer. The box bar 70 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 70 has an upper half (first box bar portion) 70a that is located 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 box bar portion) 70b that is located on the lower surface side of the tape.

[0155] The box bar 70 has a box bar body portion 71 fixed to the fastener tape, an engaging projection portion 72 that protrudes inward in the left-right direction from the butterfly bar body portion 61, a slider stopper portion 74 located at the tip (rear end) of the box bar body portion 71, and a second claw receiving recess 82 and a third claw receiving recess 83 provided on the upper half portion 70a of the box bar.

[0156] The box bar body portion 71 is fixed to the fastener tape and has a long shape in the front-to-back direction. The box bar body portion 71 has an upper box bar surface (first surface) facing upward and a lower box bar surface (second surface) facing downward. The upper and lower box bar surfaces of the box bar body portion 71 are formed by flat surfaces perpendicular to the vertical direction (see Figure 17). The upper half 70a and lower half 70b of the box bar body 71 are each provided with two pin recesses 73 that are recessed from the upper or lower surface of the box bar.

[0157] The slider stopper portion 74 protrudes upward from the upper surface of the box bar body portion 71 so that it can contact the upper wing plate 42 of the second slider 40b. By contacting the second slider 40b with the slider stopper portion 74, the slider stopper portion 74 restricts the rearward sliding of the second slider 40b.

[0158] The second claw-receiving recess 82 of the box bar 70 is formed in the approximate center of the box bar body 71 in the front-rear direction, recessed from the upper surface of the box bar body 71. The second claw-receiving recess 82 opens to the inner side edge (inner side end face) of the box bar body 71. The claw portion 52 of the second slider 40b is inserted into and housed in this second claw-receiving recess 82. This allows the second slider 40b, which is in contact with the slider stopper 74, to be held in place so as not to slide.

[0159] The third claw-receiving recess 83 of the box bar 70 is formed in a position forward of the second claw-receiving recess 82 on the box bar body 71, and further outward in the left-right direction than the second claw-receiving recess 82, so as to be recessed from the upper surface of the box bar on the box bar body 71. In this invention, the box bar 70 may be formed without the third claw-receiving recess 83.

[0160] When using the reversible, left-insertion type release fitting tool 2 of this embodiment 2 to engage the element rows of the first and second fastener stringers, which are separated from each other, first, the second slider 40b is slid and held in a position where it contacts the slider stopper 74. Then, the first slider 40a is slid and held in a position where it contacts the rear end of the second slider 40b.

[0161] Furthermore, after sliding the first slider 40a and the second slider 40b to their respective predetermined positions, the sliding operation using the pull handle is terminated, causing the claw portions 52 of the first slider 40a and the second slider 40b to automatically protrude into the element guide path. At this time, the claw portion 52 of the second slider 40b is inserted into and housed in the second claw housing recess 82 of the box bar 70.

[0162] Next, the butterfly pin 60 of the detachable inserting tool 2 is inserted into the element guide path from the right shoulder of the first slider 40a. This insertion brings the tip of the butterfly pin 60 closer to the claw portion 52 that protrudes into the element guide path of the first slider 40a. Furthermore, as the tip of the butterfly pin 60 moves backward past the position of the claw portion 52, the butterfly pin 60 is accommodated so as to span both the element guide path of the first slider 40a and the element guide path of the second slider 40b.

[0163] At this time, the claw portion 52 of the first slider 40a contacts the upper tip inclined surface 69a provided on the tip of the butterfly rod 60, and is further lifted by resting on the upper tip inclined surface 69a. As a result, the claw portion 52 of the first slider 40a can pass over the tip of the butterfly rod 60 which is inserted toward the rear.

[0164] Subsequently, as the butterfly rod 60 moves further rearward, the claw portion 52 of the first slider 40a is inserted into the space of the upper side stepped portion 65 provided on the butterfly rod 60 near the base end of the butterfly rod 60, moves into the width increasing portion 65c of the upper side stepped portion 65 or into the claw insertion passage 63, and is held in contact with the stepped bottom surface 65b of the width increasing portion 65c or the passage bottom surface 63a of the claw insertion passage 63.

[0165] As described above, the claw portion 52 of the first slider 40a moves relative to the butterfly rod 60, making it less likely for the butterfly rod 60 to get caught on the claw portion 52 of the first slider 40a when the butterfly rod 60 is inserted into the first slider 40a and the second slider 40b, thus enabling smooth insertion of the butterfly rod 60.

[0166] After the butterfly bar 60 is housed within the element guide paths of the first slider 40a and the second slider 40b, the first slider 40a is slid forward. This allows the left and right fastener elements to engage sequentially from the rear, thereby enabling the slide fastener to be closed.

[0167] Furthermore, when the claw portion 52 of the first slider 40a moves forward relative to the butterfly rod 60 due to the sliding of the first slider 40a, it can pass over at least one of the claw insertion passage 63 and the first base end insertion portion 62 of the butterfly rod 60, preferably over the claw insertion passage 63 at the base end of the butterfly rod. As a result, the first slider 40a can slide smoothly without the claw portion 52 of the first slider 40a catching on the butterfly rod 60.

[0168] On the other hand, when separating the left and right element rows from a state where they are interlocked and pulling apart the first fastener stringer and the second fastener stringer, first, the first slider 40a is slid along the element row until it comes into contact with the second slider 40b. Subsequently, by pulling out the butterfly bar 60 from the first slider 40a and the second slider 40b, the first fastener stringer having the butterfly bar 60 and the second fastener stringer having the box bar 70 can be separated.

[0169] Furthermore, in the release insert 2 of this embodiment 2, when, for example, the butterfly rod 60 is pulled out from the first slider 40a and the second slider 40b, the claw portion 52 of the first slider 40a may be located in front of the upper side step portion 65 because the first slider 40a is held at a position slightly away from the second slider 40b.

[0170] In this case, the butterfly rod 60 of this embodiment 2 is provided with a claw insertion passage 63 equipped with a guide inclined surface at the base end of the butterfly rod. As a result, when the butterfly rod 60 is pulled out from the first slider 40a and the second slider 40b, the claw portion 52 of the first slider 40a can pass through the claw insertion passage 63 while being lifted by the guide inclined surface of the claw insertion passage 63, similar to the case of embodiment 1 described above. Therefore, the claw portion 52 of the first slider 40a is prevented or suppressed from getting caught on the butterfly rod 60, and the butterfly rod 60 can be pulled out smoothly and stably.

[0171] As described above, in this embodiment 2, it is possible to form a left-insertion type, reverse-opening type disengaging insert 2 using the first slider 40a and second slider 40b, which are formed for a right-insertion type disengaging insert. This reduces the number of slider types that can be used for the disengaging insert 2.

[0172] Furthermore, in the release fitting device 2 of this embodiment 2, when the first slider 40a is slid forward after the butterfly rod 60 is inserted, the claw portion 52 of the first slider 40a can pass over the claw insertion passage 63 or the first base end insertion portion 62 (preferably over the claw insertion passage 63), making it less likely for the claw portion 52 of the first slider 40a to catch on the butterfly rod 60. As a result, the slider 40 can be slid smoothly, improving the sliding properties and starting properties of the slider 40.

[0173] In this embodiment 2, as in the case of embodiment 1 described above, it is possible to form a reverse-opening type detachable fitting device by using a cover-movable slider as described in Patent Document 1 as the first slider and the second slider.

[0174] In this case, for example, as shown by the dashed line in Figure 12, the claw portion 52a of the first slider is placed on the upper surface 61a of the butterfly bar body portion 61. The claw portion 52a of the second slider is inserted into and housed in the third claw housing recess 83 of the box bar 70. Therefore, when sliding the first slider after inserting the butterfly bar 60, the claw portion 52a of the first slider does not interfere with the first base end insertion portion 62 of the butterfly bar 60, allowing the first slider to slide smoothly.

[0175] Thus, even with the reverse-opening type detachable insert 2 of this embodiment 2, it is possible to use two types of sliders with different stop mechanism structures as the first slider 4 and the second slider, similar to the embodiment 1 described above. This improves the versatility of the butterfly rod 60, the box rod 70, and the box body 30.

[0176] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible as long as they have substantially the same configuration as the present invention and produce similar effects.

[0177] For example, in the above-described embodiments 1 and 2, the first base end insertion portions 12, 62 and the second base end insertion portions 14, 64 provided on the butterfly rods 10, 60 have a shape that can engage with box rod adjacent elements provided adjacent to the box rods 20, 70. However, in the present invention, the first base end insertion portions and the second base end insertion portions may be formed so as not to engage with (not to interlock with) the box rod adjacent elements, as long as they are formed to be insertable between the box rod and the box rod adjacent elements. 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]

[0178] 1,2 Opening and closing inserts 10 butterfly pin 10a Upper half of the butterfly bar (first half of the butterfly bar) 10b Lower half of the butterfly bar (second half of the butterfly bar) 11. Butterfly bar main body 11a Upper surface of insert pin (1st surface) 11b Lower surface of insert pin (2nd surface) 11c Pin recess 12 First proximal insertion section 13 Nail insertion passage 13a Bottom of aisle 14. Second proximal insertion section 15 Upper side step section 15a Stepped side wall 15b Step bottom 15c Gradual width increase section 15d thickened slope 16 Lower side step 17 Engaging recess 18 Element projection 20 box bars 21 Box rod main body 22 Engagement protrusion 23 Pin recess 30 box body 31 Box body part 32. Storage space 33 Auxiliary space section 40 Slider 40a First slider (front slider) 40b Second slider (rear slider) 41 Slider Torso 42 Upper wing plate 43 Lower wing plate 44 Connecting column 45 Flange section 46 Cover mounting section 46a Protrusion 47 Claw hole 50 Stop claw body 51 Claw body 52,52a Claw part 53 Elastic biasing section 54 Mounting opening 60 butterfly pin 60a Upper half of the butterfly bar (first half of the butterfly bar) 60b Lower half of insert pin (second half of insert pin) 61 Butterfly rod main body 61a Upper surface of insert pin (1st surface) 61b Lower surface of insert pin (2nd surface) 61c Pin recess 62 First proximal insertion section 63 Nail insertion passage 63a Bottom of aisle 64 Second proximal insertion section 65 Upper side step section 65b Step bottom 65c width gradually increasing section 65d thickened slope 66 Lower side step 66b Step bottom 67 Engagement recess 68 Element projection 69a Upper tip inclined surface 69b Lower tip slope 70 box bar 70a Box bar upper half (1st box bar half) 70b Box bar lower half (second box bar half) 71 Box rod main body 72 Engagement protrusion 73 Pin recess 74 Slider stopper 81 First claw housing recess 82 Second claw receiving recess 83 Third claw receiving recess W1 Width dimension of the bottom of the step

Claims

1. A slide fastener separation and insertion device comprising a butterfly pin (10, 60) provided on the first fastener stringer of the slide fastener, a box pin (20, 70) provided on the second fastener stringer of the slide fastener, and at least one slider (40, 40a, 40b) into which the butterfly pin (10, 60) and the box pin (20, 70) can be inserted, wherein the device is capable of separating the first fastener stringer and the second fastener stringer from each other when the left and right fastener elements of the slide fastener are separated, The aforementioned butterfly bar (10, 60) has a first butterfly bar half (10a, 60a) arranged on one side in the thickness direction of the slide fastener, and a second butterfly bar half (10b, 60b) arranged on the other side in the thickness direction, and in the longitudinal direction of the slide fastener, it has a butterfly bar base end arranged on the side closer to the fastener element and a butterfly bar tip arranged on the side further away from the fastener element. The aforementioned butterfly bar (10, 60) has a butterfly bar body portion (11, 61) that is attached to the fastener tape of the first fastener stringer, and a base end insertion portion (12, 62) and a claw insertion passage (13, 63) provided at the base end of the first butterfly bar half portion (10a, 60a), The base end insertion portion (12, 62) is formed to be insertable between the box bar (20, 70) and the fastener element adjacent to the box bar (20, 70) in the second fastener stringer. The claw insertion passage (13, 63) is positioned between the butterfly bar body portion (11, 61) and the base end insertion portion (12, 62), and is formed so that a part (52) of the stop claw body (50) provided on the slider (40, 40a, 40b) can pass through. The bottom surfaces (13a, 63a) of the claw insertion passages (13, 63) are positioned lower in the thickness direction than the first surfaces (11a, 61a) of the butterfly bar body (11, 61) that face one direction in the thickness direction. A detachable insertion device characterized by the following features.

2. The bottom surfaces (13a, 63a) of the claw insertion passages (13, 63) are positioned lower in the thickness direction than the first surface of the base end insertion portion (12, 62) facing one direction in the thickness direction. The release and insertion device according to claim 1.

3. The bottom surfaces (13a, 63a) of the claw insertion passages (13, 63) have guide inclined surfaces that slope downward in a direction approaching the fastener element of the first fastener stringer. The release and insertion device according to claim 1.

4. The aforementioned base end insertion portion (12,62) is provided as the first base end insertion portion (12,62), The second butterfly bar half (10b, 60b) is provided with a second base end insertion portion (14, 64) which is formed to be insertable between the box bar (20, 70) and the fastener element adjacent to the box bar (20, 70). The maximum thickness dimension of the first base insertion portion (12,62) is smaller than the maximum thickness dimension of the second base insertion portion (14,64). The release and insertion device according to claim 1.

5. At least a portion of the opposing side edge of the butterfly bar (10, 60) that faces the box bar (20, 70) is provided with a side stepped portion (15, 65) into which a portion of the stop claw body (50) can be inserted. The side stepped portion (15, 65) has a stepped side wall surface (15a) formed via a bend from the first surface (11a, 61a) of the butterfly rod body portion (11, 61), and a stepped bottom surface (15b, 65b) connected to the lower end of the stepped side wall surface (15a). The release and insertion device according to claim 1.

6. The first surface of the base insertion portion (12, 62) facing one direction in the thickness direction and the bottom surface (15b, 65b) of the side step portion (15, 65) form a smooth, continuous flat surface. The stepped bottom surface (15b, 65b) has a thickened inclined surface (15d, 65d) that slopes upward toward the first surface of the base end insertion portion (12, 62). The release and insertion device according to claim 5.

7. The side stepped portions (15, 65) have width increasing portions (15c, 65c) that gradually increase the width dimension of the stepped bottom surface (15b, 65b) toward the base end of the butterfly rod. The release and insertion device according to claim 5.

8. The side stepped portion (15) is provided continuously in the longitudinal direction from the claw insertion passage (13) to the tip of the butterfly bar. The release and insertion device according to claim 5.

9. A box body (30) is provided which is integrally formed with the box rod (20) and has a storage space (32) capable of accommodating a part of the butterfly rod (10). The claw portion (52), which is a part (52) of the stop claw body (50), is positioned in the slider body (40) at a location offset to one side in the width direction from the center of the slider body (41), and is detachably positioned in relation to the element guide path of the slider body (41). When the slider (40) is in contact with the box body (30), the claw portion (52) is held in contact with the claw insertion passage (13) of the butterfly rod (10) or the side step portion (15) provided on the opposing side edge of the butterfly rod (10), with the bottom surface (13a) of the passage (13) or the bottom surface (15b) of the step portion (15) of the side step portion (15). The release and insertion device according to claim 1.

10. The two sliders (40a, 40b) are attached to the second fastener stringer with their rear openings facing each other. The box bar (70) has a slider stopper (74) that abuts against and stops one of the sliders (40b), and a receiving recess (82) provided on one side of the box bar (70) in the thickness direction, into which a part (52) of the stop claw body (50) of the one slider (40b) is inserted and accommodated. The receiving recess (82) opens at the opposite side edge of the box bar (70) that faces the wing bar (60), The claw portion (52), which is a part (52) of the stop claw body (50), is positioned in the slider body (40a, 40b) at a location offset to one side in the width direction from the center of the slider body (41), and is detachably positioned in relation to the element guide path of the slider body (41). In a state where one of the sliders (40b) is in contact with the slider stopper (74) of the box bar (70), and the other slider (40a) is in contact with the one slider (40b), the claw portion (52) of the other slider (40a) is held in contact with the claw insertion passage (63) of the butterfly bar (60) or the side step portion (65) provided on the opposing side edge of the butterfly bar (60), with the passage bottom surface (63a) of the claw insertion passage (63) or the step bottom surface (65b) of the side step portion (65) being the same. The release and insertion device according to claim 1.

11. The butterfly bar (60) has a tip inclined surface (69a) provided at the corner of the tip of the butterfly bar facing the box bar (70), The tip inclined surface (69a) of the butterfly bar (60) slopes downward so as to gradually reduce the thickness dimension of the butterfly bar (60) in the length direction and the width direction. The release and insertion device according to claim 10.

Images