Abstract:
A slider for slide fasteners having a slider body with the leading end of the upper and lower plates connected by a connecting bar and a y-shaped element guiding path disposed between the upper and lower plates, a pull with one end rotatably held on the upper plate, and a stopping hook disposed on the upper plate and having a hook at one end; the upper plate having an insertion groove for inserting the stopping hook, a locking part for locking the other end of the stopping hook, and a hook eyelet drilled so that the hook can be inserted; and the stopping hook is disposed so that by tilting/erecting manipulations of the pull, the hook can be inserted/withdrawn from the element guiding path through the hook eyelet; wherein the corners of the stopping hook that contact the locking part, at least during locking operation, form beveled parts.

Description:
This application is a national stage application of PCT/JP2010/066439 which is incorporated herein by reference. 
     TECHNICAL FIELD 
     The present invention relates to a slider for slide fastener, which has an automatic stop mechanism using a locking pawl. 
     RELATED ART 
     Conventionally, as a slider used for a slide fastener, there has been known a slider having an automatic stop mechanism in which when a pull is set free from being operated after unzipping or zipping, a locking pawl assembled in the slider keeps the slider at a stop position as energized by the spring force thereof, and keeps the stop state of the slider unchanged unless otherwise the pull is operated again. This sort of slider is disclosed in International Patent Publication WO2010/070744 (Patent Document 1). 
     As illustrated in  FIG. 9  and  FIG. 10 , a slider  1 C disclosed in Patent Document 1 has a slider body  2  in which front ends of upper and lower wing plates  21 ,  22  are connected by a connection post  23 , and a Y-shaped element guiding path is disposed between the upper and lower wing plates  21 ,  22 , a pull  5  swingably held at one end thereof by the upper wing plate  21 , and a locking pawl  6  arranged to the upper wing plate  21  and having a pawl portion  61  at one end thereof. The upper wing plate  21  has an insertion groove  32  into which the locking pawl  6  is inserted, caulking portions  34  which caulk and fix the other end of the locking pawl  6 , and a pawl hole  37  pierced so as to allow therethrough insertion of the pawl portion  61 . The locking pawl  6  is disposed so as to allow the pawl portion  61  to be inserted to, or ejected from the element guiding path through the pawl hole  37  by falling or erecting operations of the pull  5 . 
     Patent Document 1 also proposes to arrange the caulking portions  34  in the above-mentioned slider so that the level of height of upper ends  34   a  of the caulking portions  34  are aligned in the same plane with the top surface of the upper wing plate  21 , or kept lower than the top surface when the locking pawl  6  is caulked and fixed therein, for the purpose of preventing the locking pawl from being limited in travel when the slider is used, smoothening the inserting/ejecting operations of the pawl portion  61  to or from the element guiding path, and thereby stably maintaining the sliding characteristics of the slider and the automatic stop mechanism over a long term. More specifically, it is described that a recess  33  is provided with the top surface side of a portion of the upper wing plate  21  where the connection post  23  is connected while placing the insertion groove  32  in between, and the caulking portions  34  are provided so as to rise up from the bottom surface of the recess  33 . 
     RELATED ART DOCUMENT 
     PATENT DOCUMENT 1: International Patent Publication No. WO2010/070744 
     SUMMARY OF THE INVENTION 
     Problems to be Solved by the Invention 
     According to the slider  1  described in Patent Document 1, the level of height of the upper end of the caulking portions  34 , having the locking pawl  6  caulked and fixed therein, is aligned in the same plane with the top surface of the upper wing plate  21  or kept lower than the top surface, so that the pull  5  is prevented from colliding on the caulking portions  34  even if tilted down towards the front end of the slider body  2 , and also the caulking portions  34  are prevented from being brought into contact with other members, and thereby the caulking portions  34  are prevented from being directly applied with external force, and from crushing as a consequence, when the slider  1  is used. Accordingly, a clearance provided when the other end of the locking pawl  6  is fixed by the caulking portions  34  may be maintained in a stable manner, and thereby producing a benefit of reducing limitation on the travel of the locking pawl when the slider is used. 
     However, the present inventors have found out that the slider  1  described in Patent Document 1 may sometimes fail in achieving a sufficient level of spring force for ensuring the stop position of the slider  1  biased by the locking pawl  6 , and may even be likely to cause cracks in the caulking portions  34 . Therefore the main object of the present invention is to provide a slider which allows the locking pawl  6  to fully express a desired level of spring force, and less likely to cause cracks in the caulking portions  34 . 
     Means for Solving the Problem 
     The present inventors have made intensive studies so as to solve the above-described problems, and have found out that the locking pawl described in Patent Document 1 has an angular ridge, so that when the locking pawl is caulked by inwardly bending the left and right caulking portions, the ridge is likely to be caught by a contact surfaces with the caulking portions  34 , and thereby the locking pawl  6  is less readily placed to a predetermined position. If the locking pawl  6  is held before being fully descended to the predetermined position, the locking pawl  6  cannot express an expected level of spring force and is weakened in the function of maintaining the stop position of the slider. It was also found that the caulking portions  34  are subjected to local stress in the contact surface thereof with the locking pawl  6 , from which cracks tend to originate. The present inventors therefore have improved the structure in which the caulking portions  34  may be prevented from being subjected to local stress by chamfering the ridge of the caulking portions  34  to be brought into contact with the locking pawl  6 . 
     According to one aspect of the present invention, there is provided a slider for slide fastener which includes a slider body in which upper and lower wing plates are connected to each other at the front ends thereof by a connection post, and a Y-shaped element guiding path is disposed between the upper and lower wing plates; a pull swingably held at one end thereof by the upper wing plate; and a locking pawl disposed in the upper wing plate and having a pawl portion on one end thereof, the upper wing plate including an insertion groove into which the locking pawl is inserted; a caulking portion caulking and fixing the other end of the locking pawl; and a pawl hole pierced so as to allow therethrough insertion of the pawl portion, the locking pawl being arranged so as to allow the pawl portion to be inserted to, or ejected from the element guiding path through the pawl hole by falling or erecting operations of the pull, wherein a ridge of the locking pawl, which is brought into contact with the caulking portion, is provided with a chamfer portion. 
     In one embodiment of the slider for slide fastener according to the present invention, the chamfer has an rounded profile and has a slip surface so as to be slidable over a contact surface with the caulking portions, and the locking pawl is adjusted in the spring force thereof by the action of caulking. 
     In another embodiment of the slider for slide fastener according to the present invention, the locking pawl has a hook portion which is formed by bending the other end located on the opposite side of the pawl portion, and is directed to be engaged in a front end of the insertion groove, a flat portion extending along the insertion groove is provided between the pawl portion and the hook portion, the ridge to be brought into contact with the caulking portions is located on a top surface of the flat portion, and the chamfer portion is also provided at a top surface of a bent portion which forms a boundary between the hook portion and the flat portion. 
     In another embodiment of the slider for slide fastener according to the present invention, the pull has a pull body, left and right arm portions extending from one end of the pull body in a parallel manner, and a connecting bar connecting end parts of the left and right arm portions, a cam portion is integrally provided at a center portion of the connecting bar and protrudes into an opening formed by the connecting bar, the left and right arm portions, and one edge of the pull body, a cover portion having a nearly U-shaped cross section is provided between the pawl portion and hook portion of the locking pawl and is disposed so as to cover the connecting bar and the cam portion from above, and a ridge of the cover portion, which is brought into contact with the cam portion or the connecting bar, is provided with a rounded chamfer portion. 
     Effect of the Invention 
     According to the slider of the present invention, the ridge of the locking pawl to be brought into contact with the caulking portion is chamfered, so that the locking pawl becomes more smoothly slidable over the contact surface with the caulking portion. Accordingly, the locking pawl becomes less likely to be caught by the caulking portion, and thereby the locking pawl becomes more readily be arranged to a predetermined position. In the case that the locking pawl is arranged to the predetermined position, the locking pawl is now possible to fully express its desired spring force, and thereby reliability of an automatic stop mechanism of the slider improves. In addition, according to the slider of the present invention, since the caulking portion is relieved from local stress on the contact surface thereof with the locking pawl, the contact surface becomes less likely to originate cracks, and thereby the caulking portion may be improved in the durability. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a slider of Example 1 of the present invention, with the constituents exploded. 
         FIG. 2  is a perspective view of the slider of Example 1 of the present invention, with the constituents assembled. 
         FIG. 3  is a perspective view illustrating a geometry of the locking pawl in Example 1. 
         FIG. 4  shows a cross sectional view taken along the dashed line A in  FIG. 3  (upper figure), and a cross sectional view taken along the dashed line B (lower figure). 
         FIG. 5  is a center cross sectional view taken in parallel with the front-back direction and vertical direction in  FIG. 2 . 
         FIG. 6A  is a cross sectional view taken along the line IV-IV in  FIG. 5 , with the caulking portions before caulking and fixing the locking pawl. 
         FIG. 6B  is a cross sectional view taken along the line IV-IV in  FIG. 5 . 
         FIG. 7  is a cross sectional view taken along the line V-V in  FIG. 5 . 
         FIG. 8  is a center cross sectional view illustrating the slider of Example 1 of the present invention, which shows an erecting operation of the pull from the state of being fallen towards the rear hole. 
         FIG. 9  is a perspective view illustrating of the slider described in Patent Document 1, with the components exploded. 
         FIG. 10  is a cross sectional view of the slider described in Patent Document 1, illustrating the area where the caulking portion is provided. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     In the following, embodiments of the present invention are described in detailed based on Examples with reference to the drawings. 
     Example 1 
       FIG. 1  is a perspective view of a slider for slide fastener  1 A according to Example 1 of the present invention, with the constituents exploded, and  FIG. 2  is a perspective view of the slider in an assembled state.  FIG. 5  is a center cross sectional view taken along the front-back direction and vertical direction in  FIG. 2 .  FIG. 3  is a perspective view illustrating a geometry of the locking pawl  6  in Example 1. 
     In the slider  1 A of the present invention, the direction towards which the slider slides to engage element arrays is defined as front, and the direction towards which the slider slides to separate the element arrays is defined as rear. The direction orthogonal to the upper and lower wing plates is defined as the vertical direction, and the direction parallel to the upper and lower wing plates, and orthogonal to the direction of sliding of the slider is defined as the transverse direction. 
     The slider for slide fastener  1 A of Example 1 has, as seen in  FIG. 1 ,  FIG. 2  and  FIG. 5 , a slider body  2 , a pull  5  swingably held at one end thereof by the slider body  2 , and a locking pawl  6  disposed in the slider body  2 . In the slider  1 A of Example 1, the slider body  2  and the pull  5  are manufactured by die casting using a metal material such as copper alloy, aluminum alloy or zinc alloy. The locking pawl  6  is manufactured by using a metal material such as stainless steel or copper alloy, by press forming. 
     The slider body  2  has, as seen in  FIG. 1 ,  FIG. 2  and  FIG. 5 , an upper wing plate  21 , a lower wing plate  22 , and a connection post  23  which connects the upper and lower wing plates  21 ,  22  at front end side thereof. Upper flanges  24  are formed on the left and right edges of the upper wing plate  21  toward the lower wing plate  22 . Lower flanges  25  are formed on the left and right edges of the lower wing plate  22  toward the upper wing plate  21 . 
     Furthermore, the slider body  2  has, as seen in  FIG. 1 ,  FIG. 2  and  FIG. 5 , shoulder holes  26  which is disposed at the front end of the slider body  2  and is located on the left and right of the connection post  23 , and a rear hole  27  which is disposed at the rear end of the slider body  2 . A Y-shaped element guiding path  28  is defined between the upper and lower wing plates  21 ,  22  and connects the left and right shoulder holes  26  and the rear hole  27 . 
     The upper wing plate  21  of the slider body  2  has left and right pull holding portions  31  which swingably hold one end of the pull  5 , an insertion groove  32  which is disposed at the center in the transverse direction of the top surface of the upper wing plate  21 , into which the locking pawl  6  is inserted, recesses  33  provided at the front end of the upper wing plate  21  so as to locate the insertion groove  32  in between, a left-right pair of caulking portions  34  which are provided so as to rise up from the bottom surfaces of the recesses  33 , protruded portions  35  which are disposed between the pull holding portions  31  and the recesses  33  and on the left and right sides of the insertion groove  32 , formed so as to protrude from the top surface of the upper wing plate  21 , and a pull disengaging portion  36  which engages with the pull  5  so as to be removable by pulling when the pull  5  is fallen towards the rear hole  27  side. 
     The pull holding portions  31  have front-rear pairs of pull caulking projections disposed on the left and right sides of the insertion groove  32 . A connecting bar  53  of the pull  5 , which will be described later, can be swingably held by the pull holding portions  31  by inserting the connecting bar  53  of the pull  5  between the pull caulking projections  31   a , and then by caulking the front-rear pairs of pull caulking projections  31   a  so as to bend them in the mutually approaching direction. 
     The insertion groove  32  has a width equivalent to, or slightly larger than the width (dimension in the transverse direction) of the locking pawl  6  so as to allow stable insertion of the locking pawl  6 . A pawl hole  37  is formed on the rear end of the insertion groove  32  by piercing so that the pawl hole  37  allows insertion of a later-described pawl portion  61  of the locking pawl  6  when the locking pawl  6  is placed in the insertion groove  32 . 
     The recesses  33  are formed on the top surface of the area, where the connection post  23  is connected (i.e., front end portion), of the upper wing plate  21 . In Example 1, since the insertion groove  32  extends along the front-back direction at the center in the transverse direction, the recesses  33  are disposed so as to be divided into left and right sections while placing the insertion groove  32  in between. Step portions  38  are formed in a portion surrounding the front half part of the recesses  33  and each of the step portions has a stepped surface at the level of height between those of the top surface of the upper wing plate  21  and the bottom surface of the recess  33 . 
     The locking pawl  6  is made of a metal such as copper alloy, stainless steel or copper alloy and has elasticity. As seen in  FIG. 3  and  FIG. 5 , the locking pawl  6  has a pawl portion  61  at one end thereof which can be inserted into, or ejected from the element guiding path  28  through the pawl hole  37  of the slider body  2 , and has a hook portion  62  at the other end thereof which is inserted into the front end  32   a  of the insertion groove  32  of the slider body  2 . The hook portion  62  is formed by bending the other end portion toward the insertion groove  32 . The front end  32   a  of the insertion groove  32  inclines downwardly to form a recess, into which the hook portion  62  may be engaged. 
     A cover portion  63  having a nearly U-shaped cross section is provided between the pawl portion  61  and the hook portion  62  of the locking pawl  6 , but more closer to the pawl portion  61  so as to cover the connecting bar  53  and the cam portion  56  of the pull  5  from above. A flat portion  65  extending along the insertion groove  32  are also provided more closer to the hook portion  62 . 
     The locking pawl  6  has first rounded chamfer portions  64  which are formed on the left and right ridges of the top surface of the flat portion  65  and each of the first rounded chamfer portions  64  extends forward from midway of the top surface to a bent portion  66  forming a boundary between the flat portion  65  and the hook portion  62 .  FIG. 4  schematically illustrates a cross section taken at an unchamfered portion indicated by the dashed line A in  FIG. 3  (upper figure), and a cross section taken at a chamfered portion indicated by the dashed line B (lower figure). The locking pawl  6  also has second rounded chamfer portions  67  formed on the left and right ridges of the lower surface of the cover portion  63 . Accordingly, stress load locally applied to the contact surface of the caulking portions  34  with the locking pawl  6  and the contact surface of the cam portion  56  or the connecting bar  53  with the locking pawl  6  may be reduced. Radius of chamfering of the first and second rounded chamfer portions  64 ,  67  may optionally be determined by taking size of the slider and an expected effect of reducing the stress into consideration, wherein it is preferably determined within the range from t/2 to t/3 (t represents thickness of sheet, see  FIG. 4 ). The radius is determined within this range, so that the side surfaces of the caulking portions  34  may smoothly slide over the rounded chamfer portions  64 ,  67  so as to allow smooth caulking. 
     Referring to  FIG. 6A , illustrating a cross sectional view taken along the line IV-IV in  FIG. 5  with the caulking portions  34  before caulking and fixing the locking pawl, the caulking portions  34  of the slider  1 A of Example 1 are provided so as to rise up from the bottom surfaces of the recesses  33 . In this state, as illustrated in  FIG. 6B , by inserting the locking pawl  6  into the insertion groove  32  of the upper wing plate  21 , and bending the left and right caulking portions  34  inwardly for caulking, the other end of the locking pawl  6  may be fixed by caulking while remaining the presence of a predetermined clearance (see the two-way arrow in  FIG. 6B ) between the inner surfaces of the end portions of the caulking portions  34  and the bottom surface of the insertion groove  32 . 
     In Example 1, when the locking pawl  6  is fixed by caulking, the level of height of the upper ends  34   a  of the caulking portions  34  is lower than that of the top surface of the upper wing plate  21 . Accordingly, the caulking portions  34  are not protruded out from the top surface of the upper wing plate  21  and are thereby prevented from being brought into contact with other components, so that the caulking portions  34  are prevented from being directly subjected to external force and from crushing. As a consequence, it is possible to maintain the size of clearance in a stable manner, which is provided inside the caulking portions  34  when the other end of the locking pawl  6  is fixed. 
     The level of height of the upper ends  34   a  of the caulking portions  34  is variable depending on the degree of bending of the caulking portions  34 , and thereby the level of height of the locking pawl  6  may be adjusted. The two-dot chain line in  FIG. 6B  illustrates this adjustment. The higher the level of height of the locking pawl  6  is, the more the spring force of the locking pawl  6  decreases. In contrast, the lower the level of height of the locking pawl  6  is, the more the spring force of the locking pawl  6  increases. The level of height of the upper ends  34   a  of the caulking portions  34  may also be adjusted to the same plane with the top surface of the upper wing plate  21 . 
     The ridges to be brought into contact with the caulking portions  34  on the top surface of the flat portion  65  of the locking pawl  6  of Example 1 is provided with the first rounded chamfers  64 , so that the locking pawl  6  becomes more smoothly slidable over the contact surface with the caulking portions  34 . Accordingly, the locking pawl  6  becomes less likely to be caught by the caulking portions  34 , and thereby the locking pawl  6  becomes more readily be arranged to a predetermined position corresponded to the degree of bending of the caulking portions  34 . In addition, since the caulking portions  34  are relieved from local stress on the contact surface thereof with the locking pawl  6 , so that the contact surface becomes less likely to originate cracks. 
     In addition, the first rounded chamfer portions  64  extend from the flat portion  65  to the top surface of the bent portion  66 . The locking pawl  6  is made of a single flat sheet. Generally, the locking pawl  6  is manufactured by punching the contour of the locking pawl  6  from the sheet, uniformly chamfering the ridges to be brought into contact with the caulking portions  34  to give a rounded profile, followed by bending so as to form the hook portion  62  and the cover portion  63 . In this process, by forming the rounded chamfer portion over the portion where the hook portion  62  is subjected to plastic deformation, the rounded chamfer portion may be formed in a stable manner in the process of bending for forming the hook portion  62 . 
     The caulking portions  34  are formed so that when the locking pawl  6  is fixed therein by caulking, the upper ends  34   a  thereof are placed at the level of height higher than that of the stepped surfaces of the step portions  38 . With this configuration, when the other end of the locking pawl  6  is fixed by caulking by the caulking portions  34 , a predetermined clearance, in which the other end of the locking pawl  6  is movable in the vertical direction, may be ensured in a stable manner, between the inner surfaces of the end portions of the caulking portions  34  and the bottom surface of the insertion groove  32 . 
     The protruded portions  35  are disposed on the left and right sides of the insertion groove  32  so as to protrude from the top surface of the upper wing plate  21 . By virtue of the provision of the protruded portions  35 , if for example the locking pawl  6  is disposed on the insertion groove  32  and a part of the locking pawl  6  moves above the top surface of the upper wing plate  21  in association with vertical movement of the locking pawl  6  in the insertion groove  32  induced by operation of the pull  5 , the locking pawl  6  is hidden from the left and right by the protruded portions  35  so as not to protrude out from the insertion groove  32 , ensuring a good aesthetics of the slider  1 A. 
     The protruded portions  35  determine falling limit of the pull  5  by allowing themselves to contact with the pull  5  when the pull  5  is attached to the slider body  2  and falls toward the connection post  23  side as will be described later. With this configuration, even if the pull  5  falls towards the connection post  23  side entirely, a gap is ensured between the fallen pull  5  and the top surface of the upper wing plate  21 , and thereby the pull  5  may be prevented from colliding against the caulking portions  34 . 
     The pull disengaging portion  36  is provided on the top surface of the upper wing plate  21  so as to protrude upwardly at the center of the end portion on the rear hole  27  side. The pull disengaging portion  36  has a neck portion  36   a  which stands on the top surface of the upper wing plate  21 , and a disengaging head  36   b  which is provided to the upper end of the neck portion  36   a  and swells leftward and rightward out from the neck portion  36   a . In this configuration, size of the disengaging head  36   b  in the front-back direction is adjusted equally to that of the neck portion  36   a . The top surface of the disengaging head  36   b  is formed flat, and the left and right edges thereof are formed so as to swell outward to give a arc-like profile. 
     The pull  5  of Example 1 has a pull body  51 , left and right arm portions  52  extending from one end of the pull body  51  in a parallel manner, and a connecting bar  53  connecting end parts of the left and right arm portions  52 . The center of the top and back surfaces of the pull body  51  is provided with a rectangular window-like opening  54  so as to extend therethrough from the top to back. The window-like opening  54  is surrounded by sidewalls, and a sidewall  54   a  of those sidewalls, which is disposed on the other end side of the pull  5  has left and right cantilever hooking pieces  55 , extends therefrom towards the connecting bar  53 . 
     More specifically, the left and right cantilever hooking pieces  55  have first hooking piece portions  55   a  extending so as to incline the mutual distance from the bases to the ends, and second hooking piece portions  55   b  extending from the ends of the first hooking piece portions  55   a  in parallel to each other. In this configuration, the distance between the left and right second hooking piece portions  55   b  is set larger than the width-wise dimension of the neck portion  36   a  of the pull disengaging portion  36  provided to the slider body  2 , and smaller than the width-wise dimension of the disengaging head  36   b  of the pull disengaging portion  36 . 
     The connecting bar  53  of the pull  5  is formed into a cylinder so as to have a circular cross section, and the center of the connecting bar  53  is provided with a cam portion  56  which is integrally formed therewith and protrudes into an opening formed by the connecting bar  53 , the left and right arm portions  52  and one edge of the pull body  51 . The cam portion  56  has an inclined plane  56   a  on a first surface (top surface) thereof, which inclines downward towards the end of the cam portion  56  so as to gradually reduce the cross section of the cam portion  56 , taken along the direction orthogonal to the longitudinal direction of the pull  5 , from the base to the end. Accordingly, typically as illustrated in  FIG. 8 , when the pull  5  is entirely fallen down on the slider body  2  towards the rear hole  27  side, a predetermined gap  11  may successfully be formed between the inclined plane  56   a  of the cam portion  56  and the later-described cover portion  63  of the locking pawl  6 . 
     The cover portion  63  of the locking pawl  6  has a width smaller than the distance between the left and right pull holding portions  31  provided to the slider body  2 , and larger than the width of the insertion groove  32  formed in the slider body  2 . A portion of the locking pawl  6  on the other end side of the cover portion  63  has a width smaller than the width of the insertion groove  32  formed in the slider body  2 . 
     In the slider  1 A of Example 1, typically as illustrated in  FIG. 5 , by tilting the pull  5  down to the rear hole  27  side of the slider body  2 , the cam portion  56  formed on the connecting bar  53  of the pull  5  is directed nearly parallel to the top surface of the upper wing plate  21 . Since the cam portion  56  of the pull  5  does not interfere with the cover portion  63  of the locking pawl  6 , so that the cover portion  63  of the locking pawl  6  will not be lifted up by the cam portion  56 , and the pawl portion  61  of the locking pawl  6  is allowed to protrude through the pawl hole  37  into the element guiding path  28 . 
     Accordingly, in a slide fastener configured by inserting element arrays of the slide fastener chains into the slider  1 A of Example 1, by tilting the pull  5  down towards the rear hole  27  of the slider body  2 , the pawl portion  61  of the locking pawl  6  protrudes into the element guiding path  28  so as to engage with the element arrays, to thereby maintain a stop position of the slider  1 A relative to the element arrays. 
     In addition, in the case that the pull  5  is tilted down towards the rear hole  27  side of the slider body  2  as described in the above, by pressing the pull  5  into the pull disengaging portion  36  disposed in the slider body  2 , the left and right cantilever hooking pieces  55  disposed in the pull  5  are allowed to climb over the disengaging head  36   b  of the pull disengaging portion  36  while being warped outwardly, and may be engaged with the pull disengaging portion  36  of the slider body  2 , typically as illustrated in  FIG. 2 ,  FIG. 5  and  FIG. 7 . 
     By engaging the cantilever hooking pieces  55  of the pull  5  with the pull disengaging portion  36  of the slider body  2  as described in the above, it is possible to keep the pull  5  in falling condition. Accordingly, the pawl portion  61  of the locking pawl  6  is stably kept as being protruded into the element guiding path  28  and being engaged with the element arrays, and thereby the slider may be maintained consistently at the stop position. The state of engagement of the cantilever hooking pieces  55  of the pull  5  with the pull disengaging portion  36  of the slider body  2  may be removed simply by tilting the pull  5  away from the upper wing plate  21 . 
     In the slider  1 A of Example 1, as illustrated in  FIG. 5 , the cam portion  56  of the pull  5  has a downwardly inclined plane  56   a . Accordingly, even if for example the pull  5  located on the pull disengaging portion  36  is inclined relative to the top surface of the upper wing plate  21 , with the cantilever hooking pieces  55  thereof unengaged with the pull disengaging portion  36  of the slider body  2 , the cam portion  56  of the pull  5  will not interfere with the cover portion  63  of the locking pawl  6 , so that the pawl portion  61  of the locking pawl  6  may be protruded into the element guiding path  28  and may be engaged with the element arrays. 
     With this configuration, even if the pull  5  is lifted up a little in order to remove the engagement of the pull  5  with the pull disengaging portion  36 , the engagement of the pull  5  may be removed while keeping the slider  1 A at the stop position, without allowing the pawl portion  61  of the locking pawl  6  to be drawn out from the element guiding path  28 , only by tilting the pull  5  within a range not causative of interference between the cam portion  56  of the pull  5  and the cover portion  63  of the locking pawl  6 . 
     On the other hand, in the slider  1 A of Example 1, when the pull  5 , being tilted down on the rear hole  27  side of the slider body  2 , is tilted up to the direction normal to the upper wing plate  21  as indicated by the two-dot chain line in  FIG. 8 , the cam portion  56  of the pull  5  interferes with the cover portion  63  of the locking pawl  6 , as the pull  5  inclines by a predetermined angle away from the top surface of the upper wing plate  21 , thereby the locking pawl  6  is lifted up by the cam portion  56 , and the pawl portion  61  of the locking pawl  6  may be drawn out from the element guiding path  28 . 
     Since the other end of the locking pawl  6  in this event is fixed by caulking by the caulking portions  34  while keeping a predetermined clearance, so that the locking pawl  6  may readily be warped within the insertion groove  32  by virtue of the clearance and the pawl portion  61  may be drawn out smoothly. 
     Moreover, in the slider  1 A in Example 1, by tilting the pull  5  down towards the connection post  23  side from its tilted-up state, the cam portion  56  of the pull  5  no longer interferes with the cover portion  63  of the locking pawl  6 , so that the cover portion  63  of the locking pawl  6  descends, and thereby the pawl portion  61  protrudes into the element guiding path  28  and engages with the element arrays. In this way, the slider  1 A may be maintained at the stop position. 
     In the series of the tilting operation of the pull  5  described in the above, the connecting bar  53  or the cam portion  56  will be brought into sliding contact with the ridge of the back surface of the cover portion  63  of the locking pawl  6 , wherein any flash possibly resides on the ridge may prevent smooth sliding between the pull  5  and the locking pawl  6 , and may even make the contact portion of the connecting bar  53  or the cam portion  56  with the cover portion  63  more scratchable. In contrast, in the slider  1 A in Example 1, since the second rounded chamfer portions  67  are formed on the left and right ridges of the back surface of the cover portion  63 , so that the pull  5  may be tilted down and up smoothly, while allowing contact of the connecting bar  53  and the cam portion  56  with the locking pawl  6 . 
     Next, a method of assembling the slider  1 A of Example 1 is explained. First, the connecting bar  53  of the pull  5  is inserted between the front and rear pull caulking projections  31  which is individually included in the left and right pull holding portions  31  of the slider body  2 , and the front and rear pull caulking projections  31   a  are bent in the mutually approaching direction for caulking, while keeping the pull  5  tilted down towards the rear hole  27  side of the slider body  2 . In this way, the pull  5  is held to the slider body  2  so as to be swingable around the connecting bar  53 . 
     Next, the locking pawl  6  is inserted into the insertion groove  32  of the slider body  2  having the pull  5  held thereon, so that the pawl portion  61  of the locking pawl  6  is inserted into the pawl hole  37  of the slider body  2 , and, so that the cover portion  63  of the locking pawl  6  covers the connecting bar  53  and the cam portion  56  of the pull  5  from the top. In this way, the locking pawl  6  is disposed at a predetermined position of the slider body  2 . 
     Thereafter, by bending the caulking portions  34  provided to the slider body  2  inwardly for caulking, the other end of the locking pawl  6  is caulked and fixed by the caulking portions  34 , while keeping a predetermined clearance, with the pawl portion  61  of the locking pawl  6  kept inserted into the pawl hole  37 . By the process, the slider  1 A of Example 1, illustrated in  FIG. 2 , may be assembled. 
     Having described the present invention referring to Examples, the present invention is not limited to these Examples, and may be modified in various ways. For example, the pull disengaging portion  36  which engages the pull  5 , tilted down towards the rear hole  27  side, so as to be removable by pulling, is omissible. In this case, it is no more necessary for the pull body  51  to have the left and right cantilever hooking pieces  55 . 
     In the slider of Example 1, while the pull  5  is caulked and fixed by the pull holding portions  31  provided so as to protrude from the upper wing plate  21  of the slider body  2 , the pull  5  may alternatively be attached to the slider body  2  using a cover (not illustrated) engageable with the slider body  2 , presupposing that the locking pawl  6  is fixed by caulking to the slider body  2 . 
     DESCRIPTION OF SYMBOLS 
       1 A,  1 C slider 
       2  slider body 
       5  pull 
       6  locking pawl 
       11  gap 
       21  upper wing plate 
       22  lower wing plate 
       23  connection post 
       24  upper flange 
       25  lower flange 
       26  shoulder hole 
       27  rear hole 
       28  element guiding path 
       31  pull holding portion 
       31   a  pull caulking projection 
       32  insertion groove 
       32   a  front end of insertion groove 
       33  recess 
       34  caulking portion 
       34   a  upper end 
       35  protruded portion 
       36  pull disengaging portion 
       36   a  neck portion 
       36   b  disengaging head 
       37  pawl hole 
       38  step portion 
       51  pull body 
       52  arm portion 
       53  connecting bar 
       54  window-like opening 
       54   a  sidewall 
       55  cantilever hooking piece 
       55   a  first hooking piece portion 
       55   b  second hooking piece portion 
       56  cam portion 
       56   a  inclined plane 
       61  pawl portion 
       62  hook portion 
       63  cover portion 
       64  first rounded chamfer portion 
       65  flat portion 
       66  bent portion 
       67  second rounded chamfer portion