Molded surface fastener and cushion body formed integrally with the molded surface fastener

Abstract

The invention provides a molded surface fastener and a cushion body formed integrally with it wherein a molded surface fastener has first resin invasion preventing means of an expandable resin material for molding a cushion body on each of right and left side edge portions along a longitudinal direction of a thermoplastic-resin base member surface, a number of engaging elements provided between the invasion preventing means, and second resin invasion preventing means for sectioning the engaging elements into desired number of regions along the longitudinal direction of the base member and extending in a width direction between adjacent sectioned regions, the second resin invasion preventing means comprising a function for engaging/disengaging a mating engaging element, thereby the molded surface fastener securing a required binding force.

1 . A molded surface fastener comprising first resin invasion preventing means for an expandable resin material used for molding a cushion body on right and left side edge portions along a longitudinal direction of a surface of a base member of thermoplastic resin in a flat shape, a number of engaging elements provided between a right first resin invasion preventing means and a left first resin invasion preventing means, and second resin invasion preventing means for sectioning the engaging elements into a desired number of regions along the longitudinal direction of the base member, the second resin invasion preventing means extending in a width direction of the base member between adjacent sectioned regions and comprising engaging elements, the molded surface fastener being integrated with the cushion body at a same time when the cushion body is molded.  
   
   
       2 . The molded surface fastener according to  claim 1 , wherein the second resin invasion preventing means comprises a lateral wall portion extending continuously in a width direction of a base member surface, and the lateral wall portion has a lateral wall and a plurality of engaging heads extending in back and forth directions from front and rear wall surfaces of the lateral wall.  
   
   
       3 . The molded surface fastener according to  claim 2 , wherein a height of the lateral wall from the base member surface is larger than a height of a vertex of each of the engaging heads extending from the lateral wall.  
   
   
       4 . The molded surface fastener according to  claim 2 , wherein a height of a vertex of each of the engaging heads formed on the lateral wall from the base member surface is substantially equal to a height of a vertex of an engaging head of an engaging element formed in a sectioned region from the base member surface.  
   
   
       5 . The molded surface fastener according to  claim 2 , wherein the engaging heads extending in the back and forth directions of the lateral wall so as to adjoin each other in the width direction of the base member surface extend backward and forward alternately along the width direction.  
   
   
       6 . The molded surface fastener according to  claim 1 , wherein the engaging elements formed in a sectioned region and arranged in line in the width direction of the base member are joined together successively through at least partial side surfaces of rising portions thereof.  
   
   
       7 . The molded surface fastener according to  claim 1 , wherein the first resin invasion preventing means formed on the right and left side edge portions along the longitudinal direction of the base member surface comprises two or more rows of longitudinal wall portions arranged in line with an interval in the width direction of the base member, and the interval formed between the longitudinal wall portions on adjacent rows is formed as an aisle having a predetermined length in a passage direction of an expandable resin.  
   
   
       8 . The molded surface fastener according to  claim 7 , wherein respective wall portions of two or more row of the longitudinal wall portions are divided at a predetermined pitch in the longitudinal direction of the base member by gaps, and the gaps between division wall portions adjoining in a row direction are arranged in a houndstooth shape between the rows.  
   
   
       9 . The molded surface fastener according to any one of claims  7  and  8 , wherein a first wall portion of two or more rows of the longitudinal wall portions is disposed adjacent to sectioned engaging elements, a height of the first wall portion from the base member surface is substantially equal to a height of a lateral wall portion which is a second resin invasion preventing means from the base member surface, and heights of part of the longitudinal wall portion and a division wall piece disposed outside the first wall portion are set less than the height of the first wall portion.  
   
   
       10 . The molded surface fastener according to  claim 1 , wherein the molded surface fastener comprises a magnetic body or a magnet.  
   
   
       11 . The molded surface fastener according to  claim 10 , wherein the magnetic body is buried in a base member so as to extend continuously in a longitudinal direction of the base member.  
   
   
       12 . The molded surface fastener according to  claim 10 , wherein the magnet is buried in a base member so as to extend continuously in a longitudinal direction of the base member.  
   
   
       13 . A cushion body formed integrally with the molded surface fastener according to any one of claims  10  and  11 .