Reverse Opening Slide Fastener

Abstract

In the reverse opening slide fastener, an insert pin includes a side edge arranged at a box pin side and a side edge arranged at a tape inner side. A first sloped section sloped in a direction to be apart from the box pin side toward the insert pin top end is formed at the side edge arranged at a box pin side. The first sloped section is formed as being intersected with an extension line obtained by extending a planar section of the side edge arranged at a tape inner side to the insert pin top end side and has a shape sloped at an angle to be contacted to a guide column of the lower slider or to be apart from the guide column when the insert pin is inserted to upper and lower sliders. Accordingly, in the reverse opening slide fastener, insertion operation of the insert pin can be smoothly performed.

1 . A reverse opening slide fastener in which upper and lower sliders are arranged having rear openings mutually opposed and in which the top end of an insert pin can be inserted beyond a rear opening side tip of a guide column of a lower slider when the insert pin is inserted into the upper and lower sliders from a shoulder opening of the upper slider, comprising:
 a right-and-left pair of first and second fastener stringers;   the insert pin and a box pin which are arranged respectively at a lower end of inner side edge sections of the first and second fastener stringers; and   the upper slider and the lower slider which open and close the first and second fastener stringers;   wherein the insert pin includes a side edge at the box pin side and a side edge at a tape inner side being arranged opposite to the side edge at the box pin side;   a first sloped section sloped in a direction to be apart from the box pin toward the top end of the insert pin is formed at the side edge at the box pin side; and   the first sloped section is formed as being intersected with an extension line obtained by extending a planar section of the side edge at a tape inner side to the top end side of the insert pin and has a shape sloped at an angle to be contacted to the guide column of the lower slider or to be apart from the guide column when the insert pin is inserted to the upper and lower sliders.   
     
     
         2 . The reverse opening slide fastener according to  claim 1 , wherein a side face of the first sloped section of the side edge at the box pin side is formed into a continuously curved shape. 
     
     
         3 . The reverse opening slide fastener according to  claim 1 ,
 wherein a second sloped section sloped in a direction to be apart from the box pin toward the top end of the insert pin is formed at the side edge at a tape inner side being at the opposite side to the first sloped section; and   a width dimension between the first sloped section at the side edge at the box pin side and the second sloped section at the side edge at a tape inner side is decreased toward the top end of the insert pin.   
     
     
         4 . The reverse opening slide fastener according to  claim 1 ,
 wherein the lower slider includes top and back blades which are connected by the guide column and a stopper pawl which is arranged at one of the top and back blades;   a pawl guide sloped face which is sloped to gradually decrease thickness of the insert pin toward the insert pin top end is formed at a surface of the top end part of the insert pin at the stopper pawl side; and   the pawl guide sloped face is formed as crossing over the extension line.