Slider for Concealed Slide Fastener

Abstract

Provided is a slider for a concealed slide fastener that can be made compact and smoothly slide even if large transverse pulling force is applied when a slide fastener is closed. A fastener element standing-up is inclined in a horizontal state, by bringing an element rear end section of the fastener element in sliding contact with a pair of second element guide sections extending toward a rear opening from a front end edge of a lower blade. The fastener element is also in sliding contact with a first element guide section disposed on the outer periphery of a guide column, such that the fastener element becomes in a more horizontal state.

1 . A slider for a concealed slide fastener having a fastener tape bent and fixed in a U-shape and attaching/detaching fastener elements of a pair of fastener stringer, the fastener elements attached along the end edge of the bent fastener tape, wherein the slider comprises:
 a lower blade;   a pair of side walls provided to stand along both sides in the left-right direction perpendicular to the sliding direction of the slider at the lower blade;   a pair of upper plates extending to be close to each other from the upper ends of the pair of side walls and;   a guide column provided to stand at the side of a shoulder opening of the slider and standing from the lower blade;   a first element guide section protruding on the outer periphery of the guide column;   a Y-shaped tape guide passage guiding a bent section of the fastener tape bent in a U-shape by inner end surfaces of the pair of upper plates and the outer end surface of the first element guide section; and   a second element guide section extending toward a rear opening from the front end edge of the lower blade, at both left and right ends of the lower blade, and   the second element guide section protrudes toward the upper plates from the lower blade in the side of a side surface of the guide column.   
     
     
         2 . The slider according to  claim 1 , wherein the second element guide section is disposed at the same position as the front end of the shoulder opening side of the guide column or beyond the front end of the shoulder opening side in the sliding direction of the slider. 
     
     
         3 . The slider according to  claim 1 , wherein the first element guide section is formed toward the rear opening from a side of the guide column and has a side guide surface having a parallel surface to the sliding direction of the slider, and a front guide surface inclined toward the shoulder opening side or upward as a surface continuing with the side guide surface, and
 the first element guide section is opposite the second element guide section.   
     
     
         4 . The slider according to  claim 1 , wherein the second element guide section is a protruding section formed from the inner wall of the lower blade to the inner walls of the side walls. 
     
     
         5 . The slider according to  claim 4 , wherein the protruding section has an inclined surface inclined toward the side walls from the lower blade and the inclined surface is opposite the first element guide section. 
     
     
         6 . The slider according to  claim 1 , wherein in the tape guide passage, the shoulder opening-sided Y-shaped tape guide passage divided into two lines toward the shoulder opening of the slider is opened and enlarged straight toward the shoulder opening of the slider, and the second element guide section extends in the axial direction inclined inward further than the axial line of the shoulder opening-sided tape guide passage. 
     
     
         7 . The slider according to  claim 1 , wherein the start position of the second element guide section that starts to guide the element rear end section in sliding contact is disposed ahead of the first element guide section that starts to guide the coupling head of the fastener element in sliding contact. 
     
     
         8 . The slider according to  claim 1 , wherein the front end of the shoulder opening of the second element guide section is disposed ahead of the inclined surface positioned closer to the lower blade than the inner walls of the upper plates, in the first element guide section. 
     
     
         9 . The slider according to  claim 1 , wherein the fastener element is attached by sewing along the end edge of the fastener tape. 
     
     
         10 . The slider according to  claim 1 , wherein when seen from above, a front end edge in the engagement direction of the fastener element at the pair of upper plates extends close to a front end edge of the lower blade, and
 a curved section is formed by being chamfered at the inner opposite corners of the front end edge of the upper plates.   
     
     
         11 . The slider according to  claim 10 , wherein the front end edge at the pair of side walls is disposed closer to the rear opening than the front end at the second element guide section.