JP5430664B2 - Reverse opening slide fastener - Google Patents

Description

  The present invention relates to a reverse-opening slide fastener that can be opened upward and reversely and that can be opened and closed.

  As a slide fastener for opening and closing the left and right front bodies of clothing, a slide-and-fit insertion type slide fastener having a box bar and a butterfly bar at the lower end of the dentition is used.

  In a general slide fastener with a separation fitting, a butterfly bar is continuously provided at the lower end of one service tooth row, and a box for inserting the butterfly bar is connected to the lower end of the other service tooth row. It is installed. In this slide fastener with a separable insertion tool, the butterfly bar is configured so that it can be inserted into and removed from the box and slider in the state where the slider is lowered to the lowest end in contact with the box. The fastener stringer can be separated.

  Japanese Patent Application Laid-Open No. 2005-245859 (Patent Document 1) discloses a reverse-opening slide fastener that can be opened from both the upper and lower sides by arranging the rear openings of two sliders facing each other. A break-away insert has been proposed.

  The reverse opening slide fastener described in Patent Document 1 includes an upper slider and a lower slider for enabling opening and closing from both above and below, and at the lower end of the dentition row of one fastener stringer, In the state where the upper slider and the lower slider are lowered to the lowermost end of the reverse opening slide fastener and the rear openings are brought into contact with each other, a butterfly bar that can be inserted into and removed from the upper slider and the lower slider is provided. Further, a box bar having a stopper for locking the lower slider at the lowermost end is attached to the lower end of the dentition row of the opposite fastener stringer.

JP 2005-245859 A

  When the reverse-opening slide fastener provided with the above-described opening and closing insertion tool described in Patent Document 1 is used for opening and closing the left and right front bodies of clothes, after the upper slider is slid to the lowest end, The left and right fastener stringers can be separated by pulling out the butterfly sticks attached to the lower ends of the rows from the upper and lower sliders. Thereafter, the left and right fastener stringers can be coupled again by inserting the butterfly stick into the upper slider and the lower slider. Problems that may occur when the left and right fastener stringers are joined together will be described with reference to FIGS. 11 and 12.

  FIG. 11 is a partially enlarged view of the butterfly bar of the separation / insertion tool described in FIG. 6 of Patent Document 1 and the fastener stringer in the vicinity where the butterfly bar is attached. FIG. 12 shows a state in which the butterfly bar 930 once extracted from the upper slider 50 and the lower slider 60 is being reinserted into the upper slider 50 and the lower slider 60 in the reverse opening slide fastener described in Patent Document 1. FIG.

  In addition, regarding the coordinate system of the fastener stringers 916 and 17 shown in FIGS. 11 and 12, the direction in which the butterfly stick 930 and the box stick 40 are attached is down (D direction) among the longitudinal directions of the fastener stringers 916 and 17. The direction opposite to the downward direction (D direction) is defined as the upward direction (U direction). Further, as shown in FIGS. 11 and 12, the right side of the fastener stringers 916 and 17 is defined as the R direction and the left side as the L direction in the upward direction (U direction).

  First, the structure of the conventional 1st fastener stringer 916 with which the butterfly stick 930 is attached is demonstrated using FIG. As shown in FIG. 11, the first fastener stringer 916 includes a fastener tape 11 having a core portion 14 formed on an opposing end edge, and a first row of first service teeth 12 attached to the core portion 14 at a predetermined pitch. A butterfly pin 930 provided continuously below the first service tooth 12 row (D direction) and a reinforcing film 24 for improving rigidity and strength in the vicinity of the butterfly rod 930 are arranged.

  A flange sliding contact side edge 930F is formed on the right edge (R direction side edge) of the butterfly stick 930 shown in FIG. 11, and the opposite side edge 930C is formed on the left edge (L direction side edge) of the butterfly stick 930. Is formed. A top end wall 930 </ b> D having a flat portion perpendicular to the longitudinal direction of the first fastener stringer 916 is formed at the tip of the opposing side edge 930 </ b> C. In the butterfly stick 930 described in Patent Document 1, the extension line EL obtained by extending the flange sliding contact side edge 930F downward (in the D direction) intersected with the top end wall 930D in a direction substantially orthogonal to the top end wall 930D. The intersection between the extension line EL and the top end wall 930D is defined as an intersection ND.

  Next, the configuration of a conventional reverse opening slide fastener 910 will be described with reference to FIG. In FIG. 12, the upper slider 50 is lowered to the lowermost end where the rear opening of the upper slider 50 comes into contact with the rear opening of the lower slider 60, and the butterfly stick 930 that has been pulled out to open the reverse opening slide fastener 910 is removed again. It is a figure which shows the state in the middle of inserting from the shoulder opening of the right side (R direction) of the upper slider. FIG. 12 is a cut surface substantially parallel to the fastener tape 11, and is a cut surface between the upper wing pieces of the upper slider 50 and the lower slider 60 and the first and second fastener stringers 916, 17. FIG. 5 is a plan sectional view showing the inside of the tooth guide passages 50T and 60T by cutting 50 and the lower slider 60;

  A reverse opening slide fastener 910 shown in FIG. 12 is an opening / closing tool that enables opening and closing of a left front body and a right front body, such as a long coat. The reverse opening slide fastener 910 includes a pair of left and right fastener tapes 11, core portions 14 formed along opposite edges of the fastener tapes 11, and a predetermined interval so as to sandwich the core portions 14. And a large number of first and second engaging teeth 12 and 13 arranged in a row.

  The reverse-opening slide fastener 910 includes an upper slider 50 that allows the upper and lower openings to pass through the first and second engagement teeth 12 and 13 and a lower slider 60 that allows the reverse opening. The rear opening of the upper slider 50 and the rear opening of the lower slider 60 are arranged to face each other. As shown in FIG. 12, a reinforcing film 24 made of a resin film or the like is attached to the front and back of the lower end portions (end portions in the D direction) of the first and second fastener stringers 916 and 17. In the form of sandwiching the reinforcing film 24 and the core portion 14 together, a wing bar 930 and a box bar 40 are connected to the first and second engagement teeth 12 and 13 rows, respectively.

  A hook-like stopper 46 is formed at the lower end (end in the D direction) of the box bar 40. The stopper 46 prevents the lower slider 60 from falling off from below by contacting the shoulder portion of the lower slider 60 or the end of the flange 60F when the lower slider 60 is lowered to the lowest end. . In the embodiment shown in FIG. 12, the stopper 46 is engaged with the lower end of the flange 60 </ b> F in the lower slider 60 by projecting the stopper 46 in the left direction (L direction) from the lower end of the box bar 40. It is shown.

  The front wing piece (not shown) and the back wing piece 53 of the upper slider 50 shown in FIG. 12 are guide pillars at the upper part (the part in the U direction) of the left and right center (center part in the LR direction) of the upper slider 50. They are fixed to each other by 50D. From the left and right side edges of the front wing piece and the back wing piece 53 of the upper slider 50, flanges 50F are extended oppositely.

  Inside the upper slider 50 surrounded by the front wing piece, the back wing piece 53, and the flange 50F, a pair of left and right first service teeth 12 rows and second service teeth 13 rows, which are Y-shaped spaces in plan view, are provided. A service tooth guide passage 50T to be inserted is formed. A handle support (not shown) that supports the handle of the upper slider 50 in a tiltable manner is formed on the surface side of the front blade piece of the upper slider 50 (the front side of the paper surface shown in FIG. 12).

  On the left and right sides (LR direction) of the guide column 50D in the upper slider 50, shoulders of the tooth guide guide passage 50T are opened. At the lower end portion (end portion in the D direction) of the upper slider 50, a rear opening of the tooth guide guide passage 50T is opened. A tape insertion path (not shown) is formed in the edge portion of the flange 50F along the edge of the flange 50F. The tape insertion passage is a gap through which the fastener tape 11 attached to the first and second engagement teeth 12 and 13 rows inserted through the engagement tooth guide passage 50T is passed. This is the portion where the tape 11 is in sliding contact.

  Similarly to the upper slider 50 described above, the lower slider 60 shown in FIG. 12 includes a front wing piece (not shown), a back wing piece 63, a guide post 60D, and a flange 60F. A rear opening and a tape insertion path are formed. In addition, on the surface of the front wing piece of the lower slider 60, a handle support (not shown) for supporting the handle of the lower slider 60 in a tiltable manner is formed.

  As shown in FIG. 12, when the first fastener stringer 916 and the second fastener stringer 17 are once separated from each other and then joined again, the removed butterfly bar 930 is attached to the shoulder of the upper slider 50 (FIG. 12). In the example shown in Fig. 4, it is inserted from the right shoulder (R direction shoulder). At this time, after inserting the butterfly stick 930 from the shoulder of the upper slider 50, the butterfly stick 930 is parallel to the box stick 40 in the engagement tooth guide passages 50T and 60T of the upper slider 50 and the lower slider 60. The user grips the vicinity of the reinforcing film 24 below the one fastener stringer 916, and inserts it downward (D direction) while rotating it counterclockwise as shown in FIG.

  However, if the butterfly stick 930 is moved straight from the shoulder of the upper slider 50 without rotating the vicinity of the reinforcing film 24 near the first fastener stringer 916 in the counterclockwise direction, for example, as shown in FIG. When one side edge of 930 is in sliding contact with the flange 50F of the upper slider 50 and the other side edge is in sliding contact with the box bar 40, a top end wall 930D formed in a shape substantially orthogonal to the extension line EL is It collides from the front with the guide column 60D of the lower slider 60 (particularly near the apex of the guide column 60D).

  In a general reverse opening slide fastener 910, the collision with the guide column 60D is in the vicinity of the intersection ND where the top end wall 930D and the extension line EL intersect. At this time, since the top end wall 930D of the butterfly stick 930 collides with the surface of the guide column 60D from the substantially normal direction, the butterfly stick 930 cannot be lowered further (D direction). Then, the butterfly stick 930 stops at a position where it collides with the guide column 60D (that is, a position where the butterfly stick 930 does not reach the lowermost end).

  At this time, the user may feel that the butterfly stick 930 inserted from the shoulder of the upper slider 50 has stopped, and mistakenly consider that the butterfly stick 930 has been inserted to a predetermined position. If the user determines that the butterfly pin 930 has been inserted to a predetermined position, the user then slides the upper slider 50 upward (U direction) to close the reverse opening slide fastener 910. The operation to move is performed.

  However, as shown in FIG. 12, in the state where the top end wall 930D of the butterfly stick 930 is in contact with the upper part (the top part in the U direction) of the guide post 60D, the second attached to the top of the box bar 40 is the second. The counterpart first service tooth 12 that should mesh with the service tooth 13 is not lowered to a predetermined position. Therefore, even if the upper slider 50 is slid upward (in the U direction) from the state shown in FIG. 12, the second engagement tooth 13 attached immediately above the box bar 40 is located above the butterfly bar 930. The second engagement tooth 13 and the butterfly stick 930 cannot be engaged with each other, and the butterfly stick 930 is caught on the inner surface of the flange 50F of the upper slider 50. Therefore, the upper slider 50 cannot be slid upward (U direction).

  Here, if the user tries to slide the upper slider 50 upward (in the U direction), there is a risk of damaging the reverse opening slide fastener 910. Further, the user feels that the operation feeling of the reverse opening slide fastener 910 is poor while the upper slider 50 cannot be slid.

  The present invention has been made in view of the above-described problems, and in a reverse opening slide fastener that opens and closes the left and right fastener stringers, the left and right fastener stringers that have been once separated are connected again. The purpose of this invention is to provide a reverse-opening slide fastener that can smoothly insert a butterfly stick up to a predetermined position even when the butterfly stick is inserted in a straight line from the shoulder of the upper slider. Yes.

In order to achieve the above object, a reverse opening slide fastener according to the present invention includes a pair of left and right first and second fastener stringers and a butterfly pin disposed at the lower ends of opposing side edge portions of the first and second fastener stringers. And an upper slider and a lower slider for opening and closing the first and second fastener stringers, and the upper and lower sliders are arranged with their rear ends facing each other, and the butterfly bar is disposed from the shoulder of the upper slider. , A reverse opening that allows the tip of the butterfly pin to be inserted beyond the rear-portion top of the guide pillar in the lower slider when inserted into the tooth guide passage arranged between the front and back blades of the upper and lower sliders In the slide fastener, the butterfly stick is adjacent to an end portion of the first engagement tooth row of the first fastener stringer, and the fastener of the first fastener stringer An elongated rod-like portion fixed to the front and back surfaces of the tape along the tape-facing side edge of the tape, and a tip portion that curves in a direction away from the box rod toward the tip of the butterfly rod, And a flange sliding contact edge on the tape inner side disposed on the opposite side of the box stick sliding contact edge, the box stick sliding contact at the tip portion of the butterfly stick A first inclined portion that is inclined in a direction away from the box bar toward the tip of the butterfly bar such that a side edge of the butterfly bar on the side of the box bar sliding side edge is bent with respect to the tape length direction. The box bar extends over the tip of the butterfly pin so that a side surface of the flange slide side edge side of the butterfly pin is bent with respect to the tape length direction at the flange sliding side edge of the tip portion. A second sloping portion that is slanted in a direction away from Said flange sliding side edges of the elongated bar-like portion, is formed the tape flat portion parallel to the longitudinal direction, the side surface of the box pin side of the first inclined portion, the insertion of the separable pin into the upper and lower sliders Sometimes, it is formed in a curved surface that continuously curves in a direction avoiding from the guide column of the lower slider, and the curved surface is the flat surface of the flange sliding contact side edge when viewed from the front and back direction of the fastener tape. The lower slider is arranged on the front wing piece and is disposed in the front tooth guide passage, intersecting a plane along the tape front and back direction including an extension line extending to the tip side of the butterfly pin. has a pawl that projects, the said first inclined portion of the surface of the locking pawl side, toward the insert pin tip from the box Bosuri contact edge, the insert pin toward said insert pin tip of the tip portion If you lean to gradually reduce the wall thickness of Both of the claw guide slopes are formed so as to gradually reduce the thickness of the wing stick toward the sliding side edge of the box stick, and the wing stick extends from the lower end edge of the fastener tape. The tip of the butterfly stick is arranged to be biased toward the back side of the tape with respect to the thickness center position in the tape front and back direction of the fastener tape, and the claw guide slope has the hook guide passage of the lower slider. When inserted into the inside, the stop claw comes into contact, and when the butterfly pin is further inserted while the stop claw is in contact, the stop claw retreats to the surface side of the butterfly pin while sliding. It is characterized by being comprised as follows.

It is preferable that the width dimension between the said 1st inclination part in the said box-rod sliding contact edge and the said 2nd inclination part in the said flange sliding contact edge is decreasing as it goes to the front-end | tip of the butterfly stick.

Furthermore, the pawl guide slope is preferably formed across the extension line.

  In the reverse opening slide fastener according to the present invention, the butterfly bar includes a box bar sliding contact side edge disposed on the box bar side, and a flange sliding contact side edge disposed on the tape inward side. A first inclined portion that is inclined in a direction away from the box bar side toward the tip of the butterfly bar is formed on the sliding contact side edge. In addition, the first inclined portion formed at the box-sliding contact edge is formed to intersect with an extension line extending the flat portion of the flange-sliding contact edge toward the tip of the butterfly stick, and further, the first inclination The portion has a shape that is inclined at an angle that contacts or separates from the guide column of the lower slider when the butterfly pin is inserted into the upper and lower sliders. In particular, it is preferable that the first inclined portion at the edge of the box-slider contact side has a shape that is inclined at an angle that is in contact with or apart from the butterfly bar side surface of the guide column in the lower slider.

  According to the reverse-opening slide fastener of the present invention having such a configuration, when the left and right fastener stringers that have been once separated are rejoined, the butterfly pin is inserted while being moved straight from the shoulder of the upper slider. Even if it exists, a butterfly stick can be smoothly inserted to the position of the lowest end.

  More specifically, when the butterfly stick is inserted into the upper and lower sliders from the shoulder of the upper slider, for example, the base end side of the flange sliding contact edge of the butterfly stick is in sliding contact with the flange of the upper slider and the box stick sliding contact edge. When the tip end side of the slidably contacts the box bar, the top end wall (tip surface) of the butterfly pin collides with the guide column of the lower slider as described above. It was.

  On the other hand, in the present invention, even when the base end side of the flange sliding contact edge of the butterfly stick is in sliding contact with the flange of the upper slider and the tip end side of the box stick sliding contact edge is in sliding contact with the box stick, The first inclined part of the bar is in contact with the guide column of the lower slider (especially the side surface of the guide column), and the tip of the butterfly bar is guided in the direction away from the box bar by the inclination of the first inclined part. Inserted beyond the top. Alternatively, the tip of the butterfly rod is inserted beyond the top of the rear side of the guide column without the first inclined portion of the butterfly rod colliding with the guide column of the lower slider. Accordingly, the butterfly stick can be smoothly inserted to the lowermost position without being stopped by collision with the guide column of the lower slider. Here, the lowermost position of the butterfly stick is a position where the tip of the butterfly stick reaches the shoulder opening side from the top of the rear pillar side of the guide pillar in the lower slider, and the butterfly stick is substantially parallel to the box stick. Say. Further, the side surface of the guide column refers to the wall surface of the guide column in which the inclination of the surface (the inclination of the tangent when the surface is a curved surface) is 45 ° or less with respect to the length direction of the slider.

  Further, in the present invention, the side surface of the first sloping portion of the box bar sliding side edge (particularly, the side surface facing the guide column of the lower slider in the first sloping portion) can be formed as a continuous curved surface. . As a result, when the butterfly stick is inserted from the shoulder of the upper slider, the tip of the butterfly stick can be more reliably prevented from colliding with the guide pillar of the lower slider, and the butterfly stick can be more smoothly inserted to the lowest end position. be able to. In addition, since the side surface of the first inclined portion is a curved surface, the length of the butterfly stick can be shortened. Therefore, the butterfly bar can be stored in the engagement tooth guide passage of the upper and lower sliders with the lower slider lowered to the lowermost position so that the butterfly bar cannot be seen from the outside.

  Further, the reverse opening slide fastener of the present invention is formed with a second inclined portion inclined at a flange sliding contact side edge of the butterfly pin in a direction away from the box rod side toward the tip of the butterfly rod, The width dimension between the 1st inclination part in a contact side edge and the 2nd inclination part in a flange slidable contact side edge can be comprised reducing as it goes to a butterfly stick front-end | tip. Accordingly, the first inclined portion can be reliably formed while maintaining the strength of the tip of the butterfly pin, and the flange sliding contact side edge can be prevented from interfering with the flange of the lower slider when the butterfly rod is inserted. The rod insertion operation can be performed more smoothly and stably.

  Further, in the present invention, a claw guide slope inclined so as to gradually reduce the thickness of the wing stick toward the tip of the wing stick is formed across the extension line on the surface of the tip of the wing stick. In this way, the claw guide slope intersects with the extension line and crosses the extension line so that the claw guide slope is combined with the inclined surface (curved surface) of the first inclined portion, The surface at the tip of the butterfly stick has a spherical shape. As a result, even if the tip of the butterfly stick moves linearly or rotates when the butterfly stick is inserted, the lower pawl stop pawl is securely slidably in contact with the pawl guide slope. Since it can guide along, it can evacuate a stop nail stably.

FIG. 1 is a plan view of a reverse opening slide fastener according to the present invention. FIG. 2 is a cross-sectional plan view of the vicinity of the lower slider in the state where the lower slider is lowered to the lowermost end in the reverse opening slide fastener shown in FIG. FIG. 3 is a plan view for explaining the butterfly stick and the box stick in a state where the left and right fastener stringers are separated. FIG. 4 is a side view of the butterfly stick shown in FIG. 3 observed from the box stick side, and is a view taken in the direction of arrows IV-IV. FIG. 5 is a perspective view of the butterfly stick shown in FIG. 3. FIG. 6 is a plan cross-sectional view showing a state in which the upper and lower sliders are lowered to the lowermost end and the butterfly pin is once extracted and then inserted into the upper slider and the lower slider again. FIG. 7 is a side view of the state shown in FIG. 6 observed from the box bar side, and is a view taken in the direction of arrows VII-VII. FIG. 8 is a diagram showing a state in which the butterfly pin is further inserted from the state shown in FIG. 6 and the vicinity of the tip of the butterfly rod faces the guide column of the lower slider. FIG. 9 is an enlarged plan sectional view illustrating the vicinity of the tip of the butterfly stick and the guide column portion shown in FIG. FIG. 10 is a plan sectional view showing a state in which the butterfly stick is inserted to the lowest end. FIG. 11 is a partially enlarged view of a butterfly stick and a fastener stringer in the vicinity where the butterfly stick is attached in the conventional separation / insertion tool described in Patent Document 1. FIG. FIG. 12 is a diagram showing a state in which the tip of the butterfly stick comes into contact with the guide column of the lower slider when the conventional butterfly stick shown in FIG. 11 is inserted into the upper slider and the lower slider.

  Hereinafter, typical examples of the reverse opening slide fastener according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a plan view of a reverse opening slide fastener 10 according to the present invention. FIG. 2 is a cross-sectional plan view of the vicinity of the lower slider in the state where the lower slider is lowered to the lowermost end in the reverse opening slide fastener shown in FIG. FIG. 3 is a plan view for explaining the butterfly stick and the box stick in a state where the left and right fastener stringers are separated. FIG. 4 is a side view of the butterfly stick shown in FIG. 3 observed from the box stick side, and is a view taken in the direction of arrows IV-IV. FIG. 5 is a perspective view of the butterfly stick shown in FIG. 3.

  A reverse opening slide fastener 10 shown in FIG. 1 is an opening / closing tool that enables opening and closing of a left front body and a right front body, such as a jacket and a long coat. As shown in FIG. 1, the reverse-opening slide fastener 10 is attached to a pair of left and right first and second fastener stringers 16 and 17 and opposite edges of the first and second fastener stringers 16 and 17. There are provided an upper slider 50 and a lower slider 60 which are inserted through the first and second service teeth 12 and 13 rows to engage and separate the first and second service teeth 12 and 13 rows. The first and second engagement teeth 12 and 13 can mesh with each other, and meshing is performed when one engaging convex portion enters the other engaging concave portion.

  The first fastener stringer 16 has a plurality of fastener tapes 11 having cores 14 formed on opposite side edges (inner side edges) and a plurality of first tapers 16 arranged at regular intervals so as to sandwich the cores 14. It has a first service tooth 12 row and an upper stopper 18 disposed at one end portion of the first service tooth 12 row. The upper stopper 18 is a member for preventing the upper slider 50 from falling off the first engagement tooth 12 row. Further, a reinforcing film 24 made of a resin film or the like is attached to the front and back of the fastener tape 11 at the other end portion of the first service tooth 12 row. A butterfly pin 30 is continuously provided so as to sandwich the reinforcing film 24 and the core portion 14 together.

  The second fastener stringer 17 includes a plurality of fastener tapes 11 having core portions 14 formed on opposite side edges (inner side edges) and a plurality of first tapers arranged at regular intervals so as to sandwich the core portions 14. There are 13 rows of second service teeth and an upper stopper 18 disposed at one end portion of the second service teeth 13 row. The upper stopper 18 is a member for preventing the upper slider 50 from falling off the second engagement tooth 13 row. A reinforcing film 24 made of a resin film or the like is attached to the front and back of the fastener tape 11 at the other end portion of the second service tooth 13 row. A box rod 40 for positioning and holding the lower slider 60 at the lowermost end is continuously provided in such a manner as to sandwich the reinforcing film 24 and the core portion 14 together. The butterfly stick 30, the box stick 40 and the lower slider 60 constitute a separation / insertion tool 22.

  Regarding the coordinate system of the reverse opening slide fastener 10, the longitudinal direction of the fastener tape 11 is the vertical direction of the reverse opening slide fastener 10, and the upper stopper 18 is arranged for the first and second engagement teeth 12, 13 rows. The direction in which the hinge bar 30 and the box bar 40 are arranged is defined as the lower direction (D direction). Further, of the front and back directions of the fastener tape 11 shown in FIG. 1, the front side with respect to the paper surface is defined as the front surface of the reverse opening slide fastener 10 (T direction shown in FIG. 4), and the opposite side is the back surface (shown in FIG. 4). B direction). 1 to 3 and 5, the tape width direction of the fastener tape 11 is the left-right direction, and the right side toward the surface (T direction) of the reverse opening slide fastener 10 is the R direction, and the left side is the L direction. It is defined as Here, the U direction and the D direction, the T direction and the B direction, and the R direction and the L direction are opposite to each other.

  Next, the structure of each part in the box bar 40 will be described with reference to FIGS. A box bar 40 disposed below the second engagement tooth 13 row at the lower end of the opposite edge of the second fastener stringer 17 is formed in an elongated bar shape along the core part 14 of the fastener tape 11, and The slider 60 can be positioned at the lowermost end of the second fastener stringer 17, and the butterfly rod 30 inserted into the tooth guide passages of the upper slider 50 and the lower slider 60 can be positioned at the lowermost end. The lower slider 60 is disposed closer to the butterfly rod 30 and the box rod 40 than the upper slider 50. The upper slider 50 and the lower slider 60 are disposed so that their rear openings face each other. Yes.

  Here, the right edge (side edge in the R direction) of the rod-shaped box bar 40 is arranged on the flange sliding contact side edge 40F arranged on the tape inner side, and the left edge (side edge in the L direction) is arranged on the butterfly stick 30 side. If defined as the opposed side edge 40C, the flange sliding contact side edge 40F of the box bar 40 is a portion where the flanges 50F, 60F of the upper and lower sliders 50, 60 are in sliding contact. That is, when the lower slider 60 and the upper slider 50 are slid to the lowermost position, which is the end position on the box bar 40 side, respectively, the tooth guide passages 50T, 60T of the lower slider 60 and the upper slider 50 ( In FIG. 2 and FIGS. 6 to 10 described later, the flanges 50F and 60F are in sliding contact with the flange sliding contact side edge 40F.

  As shown in FIGS. 2 and 3, a hook-like stopper 46 is formed at the lower end portion of the box bar 40 in the second fastener stringer 17 so as to protrude rightward (R direction). As shown in FIG. 2, the shoulder portion of the lower slider 60 lowered to the lowest end comes into contact with the stopper 46. Accordingly, the stopper 46 can prevent the lower slider 60 from dropping from the lower side (D direction).

  In the embodiment shown in FIGS. 2 and 3, the shape of the stopper 46 is a shape protruding from the lower end of the box bar 40 in the right direction (R direction). Accordingly, when the lower slider 60 is slid to the lowermost position, the flange 60F of the shoulder portion of the lower slider 60 can be engaged with the stopper 46. The shape of the stopper 46 according to the present invention is not limited to the shape of the stopper 46 shown in FIGS. 2 and 3, and the stopper is moved from the lower end of the box bar to the front direction (T direction) of the slide fastener. Alternatively, by making the shape bulged in the back direction (B direction), the portion bulged on the front wing piece 62 or the back wing piece 63 (see FIG. 7 described later) in the lower slider 60 is applied. The lower slider 60 may be prevented from falling off from the lower side (D direction) by making contact.

  The opposing side edge 40C of the box bar 40 is an opposing surface that is disposed on the side opposite to the flange sliding contact side edge 40F and faces the butterfly stick 30. As shown in the plan view of FIG. 3, on the upper side (the U-direction portion) of the opposite side edge 40 </ b> C of the box bar 40, a triangular piece-like second engagement forming a second locking portion 44 and a guide surface 43. A stop guide piece 42 is formed so as to protrude from the opposite side edge 40C. The 2nd latching | locking part 44 has formed in the planar shape the upper side (U direction) side in which the 2nd operation tooth 13 row | line | column exists. The guide surface 43 has a shape in which the dimension in the width direction gradually increases upward (U direction), and when the lower slider 60 is slid upward (U direction) from the lowermost end, the lower slider 60 This is configured as an inclined guide surface that slides in contact with the guide pillar 60D and opens the lower end portion of the box bar 40 in the right direction (R direction). The guide surface 43 is formed as a guide surface that smoothly shifts to the engagement state and the release from the engagement state by the first engagement tooth 12 row and the second engagement tooth 13 row.

  In the present embodiment, the guide pillars 50D and 60D of the upper and lower sliders 50 and 60 have apexes on the rear side. The guide pillars 50D and 60D have an inclined surface that gradually increases the thickness in the width direction from the apex toward the shoulder, and on the shoulder mouth side, the inclined surface that gradually decreases the thickness in the width direction via an inflection point. have. Further, the inclined surface on the shoulder opening side has a larger inclination angle than the inclined surface that gradually increases the thickness on the rear opening side. In this case, on the inclined surface formed on the apex side of the guide pillars 50D and 60D, the wall surface of the guide pillars 50D and 60D having a tangential inclination greater than 45 ° with respect to the length direction of the slider in the vicinity of the apex. The left and right wall surfaces, whose rear surfaces are inclined at 45 ° or less with respect to the slider length direction, are the side surfaces of the guide pillars 50D and 60D.

  Next, the structure of each part in the butterfly stick 30 will be described with reference to FIGS. The butterfly stick 30 disposed below the first engagement tooth 12 row at the lower end portion of the opposing edge of the first fastener stringer 16 is formed in an elongated rod shape along the core portion 14 of the fastener tape 11. In order to facilitate the insertion of the once-extracted butterfly pin 30 into the tooth guide passages of the upper slider 50 and the lower slider 60 from obliquely above, the tip of the butterfly rod 30 The distal end portion at 30 is curved leftward (L direction).

  Here, the left side edge (side edge in the L direction) of the rod-shaped butterfly stick 30 is arranged on the flange sliding contact side edge 30F arranged on the inner side of the tape, and the right side edge (side edge in the R direction) is arranged on the box bar 40 side. It is defined as a box bar sliding contact side edge (opposed side edge) 30C. The flange sliding contact side edge 30F of the butterfly bar 30 is a tooth guide passage 50T, 60T of the upper slider 50 and the lower slider 60 (see FIG. 2 and FIGS. 6 to 10 described later). ) Are portions in sliding contact with the flanges 50F and 60F of the upper slider 50 and the lower slider 60 (see FIG. 2 and FIGS. 6 to 10 described later).

  As shown in FIG. 4, the front side edge (side edge in the T direction) of the butterfly stick 30 is defined as the front wall 30T, and the back side edge (side edge in the B direction) is defined as the back wall 30B. The front wall 30T and the back wall 30B of the butterfly stick 30 are provided in the tooth guide passages 50T and 60T of the upper slider 50 and the lower slider 60 (see FIG. 2 and FIGS. 6 to 10 described later). This is a portion that slidably contacts the inner walls (see FIG. 7 described later) of the front blade piece 62 and the back blade piece 53 of the upper slider 50 and the lower slider 60.

As shown in FIG. 3, the box bar sliding contact side edge 30 </ b> C of the butterfly stick 30 is an opposing surface that is disposed on the opposite side of the flange sliding contact side edge 30 </ b> F and faces the box bar 40. The box bar sliding contact side edge 30C is arranged on the flat part parallel to the tape length direction, and on the tip side of the butterfly stick with respect to the flat part. The first inclined portion 30E is formed so as to be inclined toward the tip portion of the butterfly stick 30 so as to be bent away from the box stick 40 side. As will be described later, the first inclined portion 30E inserts the butterfly rod 30 into the upper and lower sliders 50, 60, the flange sliding contact side edge 30F of the butterfly rod 30 is in sliding contact with the flange 50F of the upper slider 50, and When the box bar sliding contact side edge 30C of the butterfly bar 30 is in sliding contact with the opposite side edge 40C of the box bar 40, the lower bar 60 contacts the butterfly side surface of the guide column 60D (or the guide column 60D of the guide column 60D). It has a shape that is inclined at an angle (such as being spaced from the side surface of the butterfly pin side).

Further, as shown in FIG. 3, the flange sliding contact side edge 30F is parallel to the tape length direction on the first engagement tooth 12 row side and contacts the flange 50F of the upper slider 50 when the butterfly pin 30 is inserted. A flat surface portion is formed, and the side surface on the flange sliding contact side edge side is inclined in a direction away from the box rod 40 side toward the tip portion of the butterfly rod 30 so as to bend with respect to the tape length direction . Two inclined portions 30G are formed. In this case, the second inclined portion 30G is formed on the opposite side of the first inclined portion 30E on the box bar sliding contact side edge 30C side, and further, the second inclined portion 30G and the box rod sliding contact side edge 30C side. The width dimension between the first inclined portion 30 </ b> E (the dimension in the LR direction) is formed so as to gradually decrease toward the tip of the butterfly stick 30. That is, the second inclined portion 30G on the flange sliding contact side edge 30F side is formed so that the change in the inclination angle is more gradual than the first inclined portion 30E on the box bar sliding contact side edge 30C side. Accordingly, the first inclined portion 30E can be reliably formed while maintaining the strength of the tip of the butterfly pin, and the flange sliding contact edge 30F may interfere with the flange 60F of the lower slider 60 and the like when the butterfly rod 30 is inserted. Can be prevented.

  Furthermore, a straight line when the flat portion of the flange sliding contact side edge 30F that contacts the flange 50F of the upper slider 50 when the butterfly rod 30 is inserted is extended toward the tip of the butterfly rod 30 is defined as an extension line EL. In this case, the first inclined portion 30E inclined by the box bar sliding contact side edge 30C is formed with an increased inclination so as to intersect the extension line EL. In particular, as shown in FIG. 8, the extension line EL is inserted into the upper slider 30 when the butterfly bar 30 is inserted from the shoulder of the upper slider 50 and the box bar sliding contact side edge 30 </ b> C of the butterfly bar 30 contacts the box bar 40. It is an extension line of the plane part which contacts 50 flanges 50F. In this case, a position where the inclined box bar sliding contact edge 30C and the extension line EL intersect is defined as an intersection ND.

  In the butterfly stick 30, a portion in the vicinity of the intersection ND faces the guide column 60 </ b> D of the lower slider 60 when the butterfly stick 30 is inserted into the tooth guide passages 50 </ b> T and 60 </ b> T of the upper slider 50 and the lower slider 60. It is an area. Further, as shown in FIG. 3, the shape of the side surface of the first inclined portion 30E, particularly the shape of the side surface in the facing region (the shape when the slide fastener 10 is viewed from the T direction) is gradually box-shaped toward the tip of the butterfly rod. It is formed in the shape of a curved surface that is continuously curved so as to be separated from 40. In addition, the shape of the side surface in the 1st inclination part 30E is not a curved surface shape, For example, the shape of the flat surface bent more than the predetermined angle with respect to the plane part of the box-bar sliding side edge 30C, or several bending | flexion It is also possible to form a surface shape that is bent in multiple stages at the portion.

  As shown in FIGS. 3 to 5, on the upper part (U-direction portion) of the box bar sliding contact edge 30 </ b> C of the butterfly stick 30, a flat plate-like first engagement with the locking surface directed downward (D direction). A stop 34 is formed. The first locking portion 34 is formed when the butterfly bar 30 once extracted is inserted into the tooth guide passages 50T and 60T of the lower slider 60 and the upper slider 50 arranged at the lowermost end. This is a portion for engaging the second locking portion 44 to stop the butterfly stick 30 at the lowermost end.

  A first locking guide piece 32 in which the front wall 30 </ b> T is extended in a plan view triangle along the first locking portion 34 is formed on the box bar sliding contact side edge 30 </ b> C of the butterfly bar 30. On the edge of the first locking guide piece 32 on the box bar 40 side, a guide surface 33 that connects the first locking portion 34 and the box bar sliding contact side edge 30C is formed. The guide surface 33 has a shape in which the dimension in the width direction gradually increases upward (U direction), and when the lower slider 60 is slid upward (U direction) from the lowermost end, the lower slider It is formed as a guide surface that slides in contact with the 60 guide pillars 60D and opens the lower end portion of the butterfly stick 30 in the left direction (L direction).

  Since the first locking guide piece 32 is a part formed by extending the front wall 30T, the butterfly stick 30 and the box stick 40 are placed in the tooth guide passages 50T and 60T of the upper slider 50 and the lower slider 60. When inserted into the second locking guide piece 32, the second locking guide piece 42 of the box bar 40 can be accommodated on the back surface (direction B) side of the first locking guide piece 32.

  Further, in order to avoid interference between the top portion of the second locking guide piece 42 protruding toward the butterfly stick 30 side and the box bar sliding contact side edge 30C on the butterfly stick 30 side, the box stick slide of the butterfly stick 30 is provided. A clearance groove 36 is formed in a portion of the contact side edge 30 </ b> C surrounded by the first locking guide piece 32 and the first locking portion 34. In addition, the 1st latching guide piece 32 has also played the role which reinforces the 1st latching | locking part 34 extended from the box bar sliding contact side edge 30C of the butterfly stick 30. FIG. Further, on the upper surface of the first locking portion 34 on the first service tooth 12 row side of the butterfly pin 30, the engagement provided on the meshing head of the second service tooth 13 at the lowermost end of the second service tooth 13 row. A meshing projection 38 that meshes with the mating recess is formed.

  In the embodiment of the butterfly stick 30 shown in the side view of FIG. 4, a claw guide slope 39 is formed in which the front wall 30 </ b> T is gradually inclined toward the back wall 30 </ b> B toward the tip of the butterfly stick 30. As will be described later with reference to FIG. 7, the claw guide slope 39 is a slider with an automatic stop device when the butterfly pin 30 once extracted is inserted into the tooth guide passage 60 </ b> T of the lower slider 60. It is an inclined surface provided for pushing the stop pawl 64 (see FIG. 2) of the lower slider 60 functioning as the surface (T direction) side and performing a smooth insertion operation.

  Here, in FIG. 2, the lower slider 60 is slid downward (D direction) from the state shown in FIG. 1, and the first and second engagement teeth 12, 13 rows are engaged with each other. The state where 60 is lowered to the lowest end is shown. As shown in FIGS. 1 and 2, the tip of the butterfly pin 30 and the tip of the box rod 40 of the reverse opening slide fastener 10 are inserted from the top of the guide post 60 </ b> D of the lower slider 60 to the shoulder opening side. In addition, the reverse opening slide fastener 10 is configured to have substantially the same position in the longitudinal direction.

  By having such a configuration, the left and right (LR direction) lengths of the first fastener stringer 16 and the second fastener stringer 17 are aligned and left-right symmetrical, and the appearance can be adjusted. Further, when the lower slider 60 is slid upward (in the U direction), the guide column 60D of the lower slider 60 can be introduced without being caught between the butterfly stick 30 and the box bar 40. Smooth sliding is possible.

  Further, by setting the lengths of the butterfly stick 30 and the box stick 40 to be appropriately short, as shown in FIG. 2, the lower slider 60 is lowered to the lowermost lower end (D direction) and the butterfly stick 30 The distal end portion and the distal end portion of the box bar 40 can be housed in the tooth guide passage 60T of the lower slider 60 and hidden. Thereby, the external appearance of the reverse opening slide fastener 10 in the state which lowered the lower slider 60 to the lowest end can be prepared.

  Next, with reference to FIGS. 6 to 10, a description will be given of the state of the process of inserting the butterfly pin 30 once extracted into the upper slider 50 and the lower slider 60 again. In FIG. 6, the butterfly pin 30 once extracted is inserted from the left (L side) shoulder of the upper slider 50, and the tip of the butterfly rod 30 moves downward (in the D direction) in the tooth guide passage 60 </ b> T of the lower slider 60. It is a plane sectional view showing the state where it slides toward. FIG. 7 is a side view of the state shown in FIG. 6 observed from the box bar 40 side, and is a view taken in the direction of arrows VII-VII shown in FIG.

  FIG. 8 is a view showing a state in which the butterfly pin 30 is further inserted from the state shown in FIG. 6 and the vicinity of the tip of the butterfly rod 30 faces the guide column 60D of the lower slider 60. FIG. 9 is an enlarged plan sectional view illustrating the vicinity of the tip of the butterfly stick 30 and the portion of the guide post 60D shown in FIG. FIG. 10 is a plan cross-sectional view showing a state in which the butterfly stick 30 is inserted to the lowest end. In addition, about the site | part same as the site | part demonstrated in FIGS. 1-5, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  First, the configuration of the upper slider 50 will be described with reference to FIGS. As shown in FIGS. 6 to 9, a guide column is formed from the center in the left-right direction (LR direction) of the upper portion (U-direction portion) of the back wing piece 53 forming the bottom of the upper slider 50. 50D is standing. The guide column 50D has a vertex on the mouth side thereafter, and further has an inclined surface that gradually increases the thickness in the width direction from the vertex toward the shoulder mouth, and on the shoulder mouth side via an inflection point. And an inclined surface for gradually reducing the thickness in the width direction. A front blade piece (not shown) is formed on the surface (T direction) side of the guide column 50D. On the surface (T direction) of the front wing piece, a handle (not shown) operated by the user is disposed so as to be freely tilted.

  From the left and right (LR direction) both side edge portions of the front wing piece and the back wing piece 53 of the upper slider 50, left and right flanges 50F are extended toward the opposite wing piece side. Inside the slider surrounded by the front wing piece, the back wing piece 53, and the flange 50F, a pair of left and right first service teeth 12 rows and second service teeth 13 rows are inserted in a Y-shaped space in plan view. A tooth guide passage 50T is formed.

  From the front wing piece, a stop claw 54 (see FIGS. 6 and 8) for functioning as a slider with an automatic stop device is protruded into the engagement tooth guide passage 50T so as to be able to advance and retreat. For example, when the user removes the hand from the handle, the stop pawl 54 automatically advances into the service gear guide passage 50T by the action of an urging means (not shown), and is engaged with the first service tooth 12 in the meshed state. This is for fixing the position of the upper slider 50 by entering the gap between the rows or the second tooth 13. Further, when the user operates the handle, when the user pulls the handle, the stop pawl 54 is pulled up from the engagement tooth guide passage 50T against the urging force of the urging means. Then, the stop pawl 54 comes out from the gap between the first service teeth 12 rows or the second service teeth 13 rows, and the fixed upper slider 50 becomes slidable.

  On the left and right sides (LR direction) of the guide column 50D in the upper slider 50, shoulders of the tooth guide guide passage 50T are opened. In the lower part (the part in the D direction) of the upper slider 50, a rear opening of the tooth guide guide passage 50T is opened. A tape insertion path is formed in the edge portion of the flange 50F along the edge of the flange 50F. The tape insertion passage is a gap through which the fastener tape 11 attached to the first and second engagement teeth 12 and 13 rows inserted through the engagement tooth guide passage 50T is passed. This is the portion where the tape 11 is in sliding contact.

  When the upper slider 50 is slid upward (in the U direction) shown in FIG. 1 with the left and right first and second engaging teeth 12 and 13 rows inserted into the engaging tooth guide passage 50T, the first state is in a separated state. The first and second engagement teeth 12 and 13 are introduced from the left and right shoulders (LR direction) of the upper slider 50. The introduced first and second engagement teeth 12 and 13 are guided and merged along the inner wall of the flange 50F of the engagement tooth guide passage 50T to form a meshing state in the lower direction (D direction) shown in FIG. It is discharged from the rear opening.

  Further, when the upper slider 50 is slid downward (D direction) shown in FIG. 1, the first and second engagement teeth 12, 13 rows in meshing state are introduced from the rear opening. The introduced first and second engagement teeth 12 and 13 in the meshing state are separated in the left and right direction (LR direction) along the guide column 50D, and then both shoulders in the upper direction (U direction) shown in FIG. Discharged from.

  Next, the configuration of the lower slider 60 will be described with reference to FIGS. As shown in FIGS. 6 to 10, a guide column is formed from the center in the left-right direction (LR direction) of the lower part (D-direction part) of the back wing piece 63 forming the bottom of the lower slider 60. 60D is standing. The guide column 60D has a vertex on the mouth side thereafter, and further has an inclined surface that gradually increases the thickness in the width direction from the vertex toward the shoulder mouth, and on the shoulder mouth side via an inflection point. And an inclined surface for gradually reducing the thickness in the width direction. Further, a front blade piece 62 (see FIG. 7) is formed on the surface (T direction) side of the guide post 60D. On the surface (T direction) of the front wing piece 62, a handle (not shown) operated by the user is disposed so as to be freely tilted.

  From left and right (LR direction) both side edge portions of the front wing piece 62 and the back wing piece 63 of the lower slider 60, left and right flanges 60F are extended toward the opposite wing piece side. Inside the slider surrounded by the front wing piece 62, the back wing piece 63, and the flange 60F, a pair of left and right first service teeth 12 rows and second service teeth 13 rows which are Y-shaped spaces in plan view are inserted. The service tooth guide passage 60T is formed.

  A stop pawl 64 (see FIGS. 6 to 10) for functioning as a slider with an automatic stop device is projected from the front blade piece 62 so as to be able to advance and retreat in the service gear guide passage 60T. For example, when the user removes the hand from the handle, the stop pawl 64 automatically advances into the service gear guide passage 60T by the action of an urging means (not shown) and is engaged with the first service tooth 12 in the meshed state. This is for fixing the position of the lower slider 60 by entering the gap between the rows or the second service teeth 13 rows. In addition, when the user operates the handle, when the user pulls the handle, the stop pawl 64 is lifted from the engagement tooth guide passage 60T against the urging force of the urging means. Then, the stop pawl 64 comes out of the gap between the first service teeth 12 rows or the second service teeth 13 rows, and the fixed lower slider 60 becomes slidable.

  On the left and right sides (LR direction) of the guide post 60D in the lower slider 60, shoulders of the tooth guide guide passage 60T are opened. In the upper part (portion in the U direction) of the lower slider 60, a rear opening of the tooth guide guide path 60T is opened. A tape insertion path is formed at the edge portion of the flange 60F along the edge of the flange 60F. The tape insertion passage is a gap for taking out the fastener tape 11 attached to the first and second engagement teeth 12 and 13 rows inserted into the engagement tooth guide passage 60T from the engagement tooth guide passage 60T to the outside of the lower slider 60. This is the portion where the fastener tape 11 comes into sliding contact when the lower slider 60 slides.

  As described above, the upper slider 50 and the lower slider 60 in the reverse opening slide fastener 10 are inserted in the first and second engagement teeth 12 and 13 into the engagement tooth guide passages 50T and 60T, respectively. The upper slider 50 is disposed closer to the butterfly stick 30 and the box stick 40, and the rear opening of the upper slider 50 and the rear opening of the lower slider 60 are arranged to face each other.

  When the lower slider 60 is slid upward (in the U direction) shown in FIG. 1, the first and second engagement teeth 12, 13 rows in meshing state are introduced from the rear opening. The introduced first and second engagement teeth 12 and 13 in the meshing state are separated in the left and right direction (LR direction) along the guide column 60D, and then both shoulders in the lower direction (D direction) shown in FIG. Discharged from.

  Further, when the lower slider 60 is slid downward (in the direction D) shown in FIG. 1 with the left and right first and second engaging teeth 12 and 13 rows inserted into the engaging tooth guide passage 60T, the separated state is obtained. The first and second engagement teeth 12 and 13 are introduced from the left and right shoulders (LR direction) of the lower slider 60. The introduced first and second engaging teeth 12 and 13 are guided and joined along the inner wall of the flange 50F of the engaging guide passage 60T, and become meshed after the upper (U direction) shown in FIG. It is discharged from the mouth.

  When the lower slider 60 is further lowered downward (D direction), the box bar 40 and the butterfly bar 30 are introduced from the shoulder of the lower slider 60, and the stopper 46 formed at the lower end of the box bar 40 is moved to the lower slider. It abuts on the shoulder part of 60 and stops. This position is the lowermost end of the lower slider 60.

  When separating all the meshes between the left and right first and second engagement teeth 12, 13, the lower slider 60 is moved to the lowermost position, and the rear opening of the upper slider 50 is located behind the lower slider 60. The upper slider 50 is lowered downward (D direction) to a position where it abuts the mouth. Then, all the first and second engaging teeth 12 and 13 rows are disengaged. Next, in this state, the reinforcing film 24 at the lower end of the first fastener stringer 16 is gripped, and the butterfly stick 30 is pulled upward (U direction). Then, the butterfly stick 30 can be extracted from the tooth guide passages 50T and 60T of the upper slider 50 and the lower slider 60, and the left and right first fastener stringers 16 and second fastener stringers 17 can be separated.

  When the left and right first fastener stringers 16 and the second fastener stringers 17 are once separated from each other, the reinforcing film 24 at the lower end of the first fastener stringer 16 is gripped to hold the butterfly pin. 30 is inserted from the left shoulder (L direction) of the upper slider 50. The state in which the butterfly pin 30 is inserted from the shoulder of the upper slider 50 and the tip of the butterfly rod 30 slides downward (in the direction D) in the tooth guide passage 60T of the lower slider 60 is shown in FIG. This is the state shown in FIG.

  In the state shown in FIG. 6, when inserting the butterfly rod 30 further deeply, the flange sliding contact side edge 30F of the butterfly rod 30 and the flange 50F of the upper slider 50 are in sliding contact with the guide surface 33 of the butterfly rod 30. The butterfly pin 30 moves downward (in the direction D) while being in sliding contact with the guide column 50D of the upper slider 50.

  When the butterfly pin 30 is further inserted from the state shown in FIG. 6, the stop claw 64 comes into contact with the front wall 30 </ b> T at the tip of the butterfly rod 30. A claw guide slope 39 in which the front wall 30T is gradually inclined toward the back wall 30B so as to gradually reduce the thickness of the butterfly stick 30 is formed at the tip of the butterfly stick 30. The stop claw 64 comes into contact with 39. When the butterfly pin 30 is further inserted downward (in the direction D) while the stop claw 64 is in contact with the claw guide slope 39, the stop claw 64 comes into sliding contact with the claw guide slope 39 of the butterfly pin 30. However, the stop pawl 64 is retracted toward the surface (T direction) (see FIG. 7). In this way, the tip of the butterfly stick 30 can pass through the portion of the lower slider 60 where the stop claw 64 protrudes, and the butterfly stick 30 can be inserted further downward (D direction). .

  In this case, as shown in FIG. 7, the tip of the butterfly pin 30 on which the claw guide slope 39 is formed is formed to be biased toward the back wall 30 </ b> B side with respect to the center line in the front and back direction of the butterfly rod 30. Furthermore, the tip of the butterfly pin 30 is located on the back surface (B direction) side of the protruding end of the stop claw 64 in a state where the stop claw 64 protrudes into the engagement tooth guide passage 60T.

In particular, the claw guide slope 39 is continuously formed at a location where the first inclined portion 30E is formed. That is, the claw guide slope 39 is formed so as to cross the extension line EL, and the claw guide slope 39 is arranged on the surface of the butterfly stick on the first inclined portion 30E side that intersects the extension line EL. Has been. For this reason, the surface at the tip portion of the butterfly stick 30 has a spherical shape due to the combination of the claw guide inclined surface 39 and the curved surface of the first inclined portion 30E. Thereby, for example, when inserting the butterfly stick 30, even if the insertion of the butterfly stick 30 is performed linearly or with rotation, the stop pawl 64 of the lower slider 60 is surely brought into contact with the pawl guide slope 39. It can be guided to the surface (T direction) side, and the stop pawl 64 can be withdrawn stably.

  When the butterfly rod 30 is further inserted from the state shown in FIGS. 6 and 7 while being straightly moved, as shown in FIGS. One inclined portion 30 </ b> E faces the guide pillar 60 </ b> D of the lower slider 60. At this time, the flange sliding contact side edge 30F of the butterfly bar 30 is in contact with the flange 50F of the upper slider 50, and the box bar sliding contact side edge 30C of the butterfly bar 30 is in contact with the opposite side edge 40C of the box bar 40. Although it is slightly separated from the guide column 60D of the lower slider 60, it is in a state of facing the guide column 60D (note that the box bar sliding contact side edge 30C of the butterfly rod 30 and the guide column 60D of the lower slider 60 May be in contact with each other).

  A portion where the box bar sliding side edge 30C of the butterfly bar 30 is closest to the guide column 60D of the lower slider 60 is defined as a proximity point CP. Further, when inserting the butterfly stick 30 into the tooth guide passages 50T and 60 of the upper slider 50 and the lower slider 60, the box bar sliding side edge of the butterfly stick 30 facing the guide column 60D of the lower slider 60 is provided. The range of the curved shape of 30C is defined as the facing area.

  In particular, the butterfly stick 30 as shown in FIG. 8 is inserted, the flange sliding contact side edge 30F of the butterfly stick 30 contacts the flange 50F of the upper slider 50, and the box stick sliding contact edge 30C is the opposite side of the box stick 40. When in contact with the edge 40C, a range of the box bar sliding side edge 30C from the contact point with the opposite side edge 40C of the box bar 40 toward the tip of the butterfly bar 30 is defined as a facing area.

  Further, the box bar sliding contact side edge 30C and the guide column 60D face each other or face each other, as shown in FIGS. 8 to 10, the surface of the box bar sliding contact side edge 30C of the butterfly bar 30 and the front and back direction of the guide column 60D. It is that the wall surfaces forming (TB direction) face each other, and when those surfaces are vertical, they are not facing each other. The butterfly stick 30 and the guide post 60D face each other in a separated state, but may be in contact with each other. Further, the proximity point CP in the embodiment shown in FIGS. 8 and 9 is located nearer to the box bar 40 than the intersection ND.

  In the conventional reverse opening slide fastener 910 (see FIG. 12), the user is aware of the reinforcing film 24 at the lower end of the first fastener stringer 916 so that the top end wall 930D of the butterfly pin 930 does not contact the guide column 60D. It was necessary to insert the butterfly stick 930 while rotating. In other words, in the conventional reverse opening slide fastener 910, the flange sliding contact side edge 930F of the butterfly bar 930 is brought into contact with the flange 50F of the upper slider 50, and the opposite side edge (box bar sliding contact side edge of the butterfly bar 30) is used. ) When the butterfly bar 930 is inserted so that 930C is brought into contact with the opposite side edge of the box bar 40, the top end wall 930D of the butterfly bar 930 collides with the guide column 60D and the insertion of the butterfly bar 930 is prevented. there were.

  In contrast, in the present invention, as shown in FIGS. 8 and 9, the first inclined portion 30 </ b> E of the box bar sliding contact side edge 30 </ b> C on the tip end side of the butterfly pin 30 is directed toward the tip portion of the butterfly pin 30. And an inclined surface (curved surface) inclined in a direction away from the box bar 40 side. That is, the tip of the butterfly pin 30 is formed on an inclined surface that is gradually inclined toward the flange sliding contact side edge 30F toward the tip. The inclined surface is formed with a positional relationship with the guide column 60D so that the inclined surface is a facing region facing the guide column 60D of the lower slider 60.

  That is, the inclined surface of the first inclined portion 30E is such that the flange sliding contact side edge 30F of the butterfly stick 30 is in sliding contact with the flange 50F of the upper slider 50, and the box stick sliding contact edge 30C of the butterfly stick 30 is the box stick 40. Is formed in a shape that is inclined at an angle away from the guide column 60D in the lower slider 60 (the inclined surface of the first inclined portion 30E is the guide column 60D). It may be formed in a shape inclined at an angle in contact with the side surface of the butterfly pin. By configuring the butterfly stick 30 having the first inclined portion 30E as described above, it is possible to avoid the tip of the butterfly stick 30 from coming into contact with the guide column 60D of the lower slider 60. Further, the facing area of the butterfly stick 30 is reduced. Contact with the guide post 60D can also be avoided, and a smooth butterfly stick insertion operation is possible.

  Further, in this case, the butterfly stick 30 is spaced from the contact point of the box bar sliding contact side edge 30C with the box bar 40 and the intersection ND that intersects the extension line EL of the box bar sliding contact side edge 30C ( The distance) is configured to be larger than the distance (distance) from the contact point to the apex of the guide column 60D of the lower slider 60. Moreover, the side shape of the first inclined portion 30E of the butterfly stick 30 is formed in a continuous curved surface shape. This reliably prevents the butterfly stick 30 from coming into contact with the guide column 60D of the lower slider 60, thereby enabling a more stable butterfly stick insertion operation.

  Further, since the second inclined portion 30G formed on the flange sliding contact side edge 30F side of the butterfly pin 30 is formed more gently than the first inclined portion 30E as described above, the change in inclination angle is formed more slowly. Is inserted, the second inclined portion 30G of the butterfly stick 30 does not contact the flange 60F of the lower slider 60.

  For example, when the butterfly pin 30 is inserted from the shoulder of the upper slider 50, the flange sliding contact side edge 30F of the butterfly rod 30 is inserted into the flange 50F of the upper slider 50 by inserting the butterfly rod 30 while slightly rotating. Although it is in sliding contact, the box bar sliding contact side edge 30C of the butterfly stick 30 may not slide in contact with the opposing side edge 40C of the box bar 40 in some cases. In this case, as in the conventional case, the tip of the butterfly pin 30 can be prevented from colliding with the guide column 60D of the lower slider 60, and the butterfly pin insertion operation can be performed smoothly.

  Subsequently, when the butterfly stick 30 is further inserted downward (D direction) from the state shown in FIGS. 8 and 9, the butterfly stick 30 gradually rotates so as to be parallel to the box stick 40. As shown in FIG. 10, the butterfly stick 30 can be smoothly inserted to the lowest end. Although not shown in FIG. 10, the first locking portion 34 (see FIG. 3) of the butterfly pin 30 abuts on the second locking portion 44 (see FIG. 3) of the box rod 40, thereby 30 can be positioned at the lowest end. Further, that the butterfly stick 30 is parallel to the box bar 40 means that the flat part of the box bar sliding contact side edge 30C or the flat part of the flange sliding contact side edge 30F and the opposite side edge 40C of the box stick 40 are Are parallel to each other.

  As described above, the reverse opening slide fastener 10 according to the present invention has a conventional structure in which the tip of the butterfly pin 30 is positioned at the lower slider even when the butterfly pin is inserted at an angle such that the tip of the butterfly pin collides with the guide column of the lower slider. It is possible to reliably avoid the collision with the 60 guide columns 60D and to stably insert the butterfly rod 30 to the lowest end position.

  In the state shown in FIG. 10, the tip of the butterfly pin 30 of the reverse opening slide fastener 10 and the tip of the box bar 40 are configured to be substantially in the same position in the longitudinal direction of the reverse opening slide fastener 10. Has been. In the state shown in FIG. 10, the position of the tip of the butterfly pin 30 is lower by the dimension DP from the top (U direction) top (rear side top) of the guide post 60D in the lower slider 60 to the bottom end of the butterfly. It is a position lowered in the (D direction).

  When the tip of the butterfly stick 30 is positioned below (U direction) below the guide column 60D of the lower slider 60, when the lower slider 60 is slid upward (U direction) from the lowermost end, It becomes easy to point the tip of the butterfly stick 30 toward the shoulder of the lower slider 60. Therefore, a smooth opening operation can be performed. When the lower slider 60 and the butterfly stick 30 are present at the lowermost end, the tip of the butterfly stick 30 and the tip of the box stick 40 are hidden in the tooth guide passage 60T of the lower slider 60. ing.

  As the first and second engagement teeth 12 and 13 of the slide fastener 10 described above, metal or resin engagement teeth can be used. Further, in the present invention, a coiled service tooth obtained by winding a linear monofilament in a coil shape may be sewn to a fastener tape, and a service tooth that can be normally used as a slide fastener can be used.

  The present invention can be applied to a reverse-opening slide fastener that can be opened upward and reversely and that can be opened and closed. Such reverse opening slide fasteners can be used for opening and closing the left and right front bodies of jackets and coats, sportswear, and other uses.

10, 910 Reverse opening slide fastener 11 Fastener tape 12 First engagement tooth 13 Second engagement tooth 14 Core portion 16, 916 First fastener stringer 17 Second fastener stringer 18 Upper stopper 22 Separation fitting 24 Reinforcement film 30, 930 Butterfly rod 30C Box bar sliding contact edge 30E First inclined portion 30F, 40F, 930F Flange sliding contact edge 30G Second inclined portion 30T Front wall 30B Back wall 32 First locking guide piece 33, 43 Guide surface 34 First 1 Locking portion 36 Escape groove 37, 937 Column guide slope 38 Engagement protrusion 39 Claw guide slope 40 Box bar 40C, 930C Opposing side edge 42 Second locking guide piece 44 Second locking portion 46 Stopper 50 Upper slider 50D, 60D Guide column 50F, 60F Flange 50T, 60T Teeth guide passage 53, 63 Back wing piece 54, 64 Stop 60 dimensions EL extension ND intersection from above the top of the lower slider 62 Table wing 64 pawl 930D Itadakitankabe CP adjacent point DP guide post to the insert pin lower end position

Claims (3)

A pair of left and right first and second fastener stringers (16, 17), and a butterfly stick (30) and a box stick (40) disposed at the lower ends of opposite side edges of the first and second fastener stringers (16, 17) ) And an upper slider (50) and a lower slider (60) for opening and closing the first and second fastener stringers (16, 17), and the upper and lower sliders (50, 60) are oriented so that the rear openings face each other. And the butterfly pin (30) from the shoulder of the upper slider (50) to the front and back wing pieces (53, 62, 63) of the upper and lower sliders (50, 60). In the reverse opening slide fastener that can be inserted beyond the top of the guide post (60D) of the lower slider (60) at the tip of the butterfly pin (30) when inserted into
The butterfly stick (30) is adjacent to the end of the first engagement tooth row of the first fastener stringer (16) and along the tape-facing side edge of the fastener tape (11) of the first fastener stringer (16). An elongated rod-like portion fixed to the front and back surfaces of the tape, and a tip portion that curves in a direction away from the box rod (40) over the tip of the butterfly pin,
The butterfly bar (30) is a box bar sliding contact side edge (30C) on the box bar (40) side and a tape inner flange disposed on the opposite side of the box bar sliding contact side edge (30C). With sliding contact edge (30F),
The side surface on the box bar sliding contact side edge (30C) side of the butterfly bar (30) is in the tape length direction on the box bar sliding contact side edge (30C) at the tip portion of the butterfly bar (30). A first inclined portion (30E) inclined in a direction away from the box bar (40) is formed toward the tip of the butterfly stick (30) so as to be bent, and the flange sliding contact side edge ( 30F), the box bar (40) is extended over the tip of the butterfly bar (30) so that the side surface on the flange sliding contact side edge (30F) side of the butterfly bar (30) is bent with respect to the tape length direction. A second inclined portion (30G) inclined in a direction away from
A flat portion parallel to the tape length direction is formed on the flange sliding contact side edge (30F) of the elongated rod-shaped portion of the butterfly rod (30) ,
The side surface of the first inclined part (30E) on the box bar (40) side is the guide column of the lower slider (60) when the butterfly bar (30) is inserted into the upper and lower sliders (50, 60). (60D) is formed on a curved surface that curves continuously in a direction avoiding from,
The curved surface includes an extension line (EL) obtained by extending the flat portion of the flange sliding contact side edge (30F) to the tip side of the butterfly stick (30) when viewed from the front and back direction of the fastener tape. It intersects the plane along the front and back direction,
The lower slider (60) is disposed on the front wing piece (62), and has a stop claw (64) protruding into the engagement tooth guide passage,
On the surface of the front end portion on the stop claw (64) side on the first inclined portion (30E) side , from the box bar sliding contact side edge (30C) to the tip of the butterfly stick, toward the tip of the butterfly stick, the same butterfly rod (30) with inclined so as to gradually decrease the thickness of the box Bosuri contact edge inclined nail guide slopes so towards the (30C) gradually decreasing the thickness of the insert pin (30) (39 ) Is formed,
The butterfly pin (30) includes an extending portion extending from a lower end edge of the fastener tape (11), and the tip of the butterfly rod (30) is located at a thickness center position in the tape front and back direction of the fastener tape. Arranged on the back side of the tape ,
When the butterfly pin (30) is inserted into the tooth guide passage (60T) of the lower slider (60), the claw guide slope (39) contacts the stop claw (64), and the stop When the butterfly pin (30) is further inserted while the claw (64) is in contact, the stop claw (64) is configured to retract to the surface side of the butterfly pin (30) while sliding. Become,
A reverse-opening slide fastener. In the reverse opening slide fastener of Claim 1,
The width dimension between the first inclined part (30E) at the box bar sliding contact side edge (30C) and the second inclined part (30G) at the flange sliding contact side edge (30F) is the butterfly pin ( 30) decreasing towards the tip,
A reverse-opening slide fastener. In the reverse opening slide fastener of Claim 1,
The claw guide slope (39) is formed across the extension line (EL),
A reverse-opening slide fastener.

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