Separable bottom end stop assembly and its assembling and separating method for concealed slide fasteners

Abstract: In a separable bottom end stop assembly for a concealed slide fastener, a socket member (1) has first- and second-plug-member insertion holes (6, 7) on opposite sides of a central catch plate (5), and an engaging tongue (9) projecting inwardly from one side wall (8). When a first plug member (2) is inserted into the socket member (1), a locking portion (17) on one side of a lower end of the first plug member (2) comes into locking engagement with the catch plate (5) and an engaging portion (18) on the other side of the lower end of the first plug member (2) comes into engagement with the engaging tongue (9). With continued inserting of the first plug member (2), an inwardly directed hook-shaped end (15) of an engaging projection (16) extending from an upper end of the socket member (1) comes into engagement with an engaging recess (22) in a rear wall (21) of a slider (19). In this state, a second plug member (3) is inserted into the second-plug-member insertion hole (7), and a slider (19) is then pulled so as to move the socket member (1) in a predetermined range, whereupon only the slider (19) is pulled to join the opposed stringers (s, s') together. To separate the closed stringers (s, s'), the slider (19) is pulled to push the socket member (1) down, and then the second plug member (3) is removed from the socket member (1) and the slider (19).

Description: 1. Field of the Invention: This invention relates to a separable bottom end stop assembly for attachment to one end of the fastener chain of a concealed slide fastener and a method of assembling such a separable bottom end stop assembly and of using it in conjunction with a concealed slide fastener by pulling a slider in the closing and opening directions. 2. Description of the Related Art: US-A-2 728 125 which forms the basis of appending claim 1 discloses a separable bottom end stop assembly for a slide fastener, comprising a socket member and a first plug member, the socket member having an engaging projection adapted to engage with an engaging recess formed in a slider body of the slide fastener. This conventional separable bottom end stop assembly is a two-component type in which the socket member and the first plug member are formed integrally. Assuming that a concealed slide fastener with the two-component type separable bottom end stop assembly is sewn onto a garment, since it is required to sew near the folded portions of the fastener stringers, smooth sewing cannot be achieved as the socket member, which is integral with the first plug member already attached to the stringer, would interfere with the sewing. Even if the concealed slide fastener with the conventional separable bottom end stop assembly could be attached to a garment, it would be difficult to insert the stringer, to which the second plug member is attached, into the socket member exactly to start moving the slider because of the presence of the folded part of the stringer. Consequently this conventional type separable bottom end stop assembly could not be of practical use. Further, with the conventional separable bottom end stop, the second plug member may be accidentally removed from the socket member easily. SUMMARY OF THE INVENTION With the foregoing problems in view, it is an object of this invention to provide a separable bottom end stop assembly for a concealed slide fastener, in which a socket member is attached to one stringer after the one stringer is sewn to a garment so that the socket member would not interfere with the sewing, and in which it is possible to insert a second plug member into the socket member exactly with ease so that the fastener chain of the concealed slide fastener can be coupled and separated in a simple manner. In order to accomplish the above object, there is provided, according to a first aspect of the invention, a separable bottom end stop assembly for a concealed slide fastener, comprising a socket member and a first plug member, the socket member having an engaging projection adapted to engage with an engaging recess formed in a slider body of the concealed slide fastener, characterized in that the first plug member has a locking portion and an engaging portion, the socket member further having a catch plate for engagement with the locking portion, and an engaging tongue for engagement with the engaging portion, whereby said socket member is movable with the slider body within a predetermined range between a first position in which the engaging tongue engages the engaging portion and a second position in which the catch plate engages the locking portion when a slider is pulled to slide on the concealed slide fastener in a fastener closing direction. Preferably, the catch plate is formed on a central upper portion of a rear wall at an upper side of the socket member. The engaging tongue projecting from a side wall and the catch plate define a first-plug-member insertion hole of the socket member. A resilient tongue of the socket member projecting from a side wall and terminating in a resiliently deformable end portion and the catch plate define a second-plug-member insertion hole. The engaging projection has a hook-shaped end. The locking portion and the engaging portion are projecting outwardly and inwardly, respectively, from a lower end of the first plug member. In this specification, an outer side of the first plug member means the side which faces the second plug member, and the other side of the first plug member is called an inner side. According to a second aspect of the invention, there is provided a method of assembling a separable bottom end stop assembly as defined above, by inserting the first plug member, which is attached to one stringer, through a slider and into the socket member in such a manner that the first plug member is movable longitudinally in the socket member; for using the bottom end stop: inserting a seocnd plug member, which is attached to the other stringer, through the slider and into the socket member, engaging the slider with the socket member, moving the slider and the socket member on the concealed slide fastener within a predetermined range in the fastener closing direction until said slider disengages from said socket member and moving only the slider in the fastener closing direction to close the concealed slide fastener, and subsequently bringing the slider into contact with the socket member, and moving said slider further with said socket member, whereby the second plug member may be removed from the socket member. The operation of this separable bottom end stop assembly and its assembling and separating method will now be described. As shown in FIG. 1, the first plug member which is attached to one stringer is inserted through the slider and then the first plug member is inserted into the first-plug-member insertion hole against the resilience of the engaging tongue and of the catch plate until the locking portion comes into engagement with the end of the catch plate. Then the slider is forced against the socket member to bring the hook-shaped end of the engaging projection into engagement with the engaging recess in the rear wall of the slider body, thus causing an intimate contact between the socket member and the slider. Now, the second plug member which is attached to the other stringer is inserted through the slider, and the second plug member is inserted into the second-plug-member insertion hole as shown in FIG. 2, whereupon the slider is pulled upwardly in closing direction to move the socket member upwardly together. As a result, the first plug member is further forwarded into the socket member against the resilience of the engaging tongue until a free end of the engaging tongue comes into engagement with the engaging portion of the first plug member. Then, when the slider is pulled upwardly to a predetermined extent, the socket member is stopped and, at the same time, the hook-shaped end of the engaging projection is released from the engaging recess in the rear wall of the slider so that only the slider is moved in the fastener closing direction to close the fastener chain. Next, when the slider is moved in the direction of opening the fastener chain, the hook-shaped end of the engaging projection is brought into engagement with the engaging recess of the slider. By moving the slider forward further, the socket member is moved together with the movement of the slider to assume the position of FIG. 2 so that the other stringer, to which the second plug member is attached, can be removed from the socket member and the slider. Thus the fastener chain can be separated. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view, partly in cross section, of a separable bottom end stop assembly, showing a first plug member immediately before being inserted into a socket member; FIG. 2 is a plan view, partly in cross section, of the separable bottom end stop assembly, showing both the first plug member and a second plug member being inserted into the socket member; FIG. 3 is a plan view, partly in cross section, of the separable bottom end stop assembly, with a closed fastener chain; FIG. 4 is a cross-sectional view taken along line I-I of FIG. 2; FIG. 5 is a side view, with part broken away, of the separable bottom end stop assembly, showing a slider being engaged with the socket member; and FIG. 6 is a rear perspective view showing the slider and the socket member. DETAILED DESCRIPTION An embodiment of a separable bottom end stop assembly, for a concealed slide fastener, of this invention will now be described in detail with reference to the accompanying drawings. The separable bottom end stop assembly of this invention has a three-member structure composed of a socket member 1, a first plug member 2 and a second plug member 3, as shown in FIGS. 1, 2 and 3. The socket member 1 has a catch plate 5 formed on a central upper portion of a rear wall 4 at an upper side of the socket member 1 and having a resiliently deformable free end. The catch plate 5 has at opposite sides a first-plug-member insertion hole 6 and a second-plug-member insertion hole 7. A front wall of the socket member 1 has an opening through which the folded portions of a pair of confronting stringers s, s' can be inserted. The socket member 1 has an engaging tongue 9 projecting from a side wall 8 of the first-plug-member insertion hole 6 and terminating in a resiliently deformable free end. The engaging tongue 9 has an enlarged head 12 at its free end and a ledge 11 contiguous to the enlarged head 12. A resilient tongue 14 projects from a side wall 13 of the second-plug-member insertion hole 7 and terminates in a resiliently deformable free end. An engaging projection 16 extends from an upper end of the rear wall 4 and terminates in an inwardly bent hook-shaped end 15. The first plug member 2 is attached to a lower end of one stringer s and has a hook-shaped locking portion 17 and an engaging portion 18 projecting in opposite directions from a lower end of the first plug member 2. When the first plug member 2 is inserted into the first-plug-member insertion hole 6 of the socket member 1, the locking portion 17 comes into locking engagement with the catch plate 5 and, at the same time, the lower end of the first plug member 2 at a side opposite to the locking portion 17 comes into contact with the ledge 11 of the engaging tongue 9. With continued inserting of the first plug member 2, the engaging portion 18 comes into engagement with the enlarged head 12 of the engaging tongue 9. The first plug member 2 has a width which increases gradually as it goes from the portion between the locking portion 17 and the engaging portion 18 toward the upper end of the first plug member 2. The second plug member 3 is attached to a lower end of the other stringer s' and has an inwardly warped bow shape. When the second plug member 3 is inserted into the second-plug-member insertion hole 7 of the socket member 1 to the deepest, the lower end surface of the second plug member 3 comes into press contact with the resilient tongue 14. Since an end of the catch plate 5 is resiliently movable, the catch plate 5 is pressed by the first plug member 2 to press the second plug member 3 so that the second plug member 3 cannot be easily removed from the socket member 1. The slider 19 has, in a rear wall 21 of a slider body 20, an engaging recess 22 in which the hook-shaped end 15 of the engaging projection 16 extending from the socket member 1 will come into engagement when the slider 19 is brought into contact with the socket member 1. When the slider 19 is pulled upwardly from the position of FIG. 2 in the direction of closing the fastener chain c (upwardly in FIG. 2), the socket member 1 also will be pulled upwardly and then stop in the position of FIG. 3, whereupon the hook-shaped end IS will be released from the engaging recess 22 under the pulling force, allowing only the slider 19 to continue sliding to close the fastener chain c. On the contrary, for separating the assembled bottom end stop, the slider 19 is pulled in the fastener opening direction to contact the socket member 1 so that the hook-shaped end 15 of the locking projection 16 extending from the socket member 1 comes into engagement with the engaging recess 22 formed in the slider body 20 of the slider 19, whereupon the slider 19 is further moved together with the socket member 1 to the position of FIG. 2, in which the other stringer s' with the second plug member 3 attached thereto can be removed from the socket member 1 and the slider 19 with ease. In several views, reference numeral 23 designates a guide flange for guiding a row of fastener element e inserted through the slider 19, and 24 designates a pull tab attached to a lug 25. The main features of the separable bottom end stop assembly of this invention, unlike that of the prior art, are that a three-member structure is composed of the socket member 1, the first plug member 2 and the second plug member 3 and that the socket member 1 is adapted to be attached to the first plug member 2. Further, the socket member 1 is slidable with the slider 19 in a predetermined range with respect to the fastener chain c. For coupling the opposite stringers s, s', the first plug member 2 attached to one stringer s is inserted through the guide channel of the slider 19 and then longitudinally movably inserted into the socket member 1. Also the second plug member 3 attached to the other stringer s' is inserted through the slider 19 and then inserted into the socket member 1, whereupon the slider 19 is pressed against the socket member 1 to be locked therewith. The slider 19 together with the socket member 1 is moved in the fastener closing direction in a predetermined range, whereupon only the slider is moved further to close the fastener chain c. For separating the opposed stringers s, s', the slider 19 is slid in the fastener opening direction to push the socket member 1 until the second plug member 3 can be removed from the socket member 1 and the slider. This method has no existence in the past. Following are the results with the separable bottom end stop assembly for a concealed slide fastener and the the method of assembling and using it according to this invention. Since the separable bottom end stop assembly of this invention has a structure composed of the socket member 1, and the independant first plug member 2, the socket member 1 having the catch plate 5 and the engaging tongue 9, the first plug member 2 having the locking portion 17 for locking engagement with the catch plate 5 and the engaging portion 18 for engagement with the engaging tongue 9, the socket member 1 further having the engaging projection 16 engageable with the engaging recess 22 formed in the slider body 20 so that the socket member 1 is moved in a predetermined range together with the slider 19 when the slider 19 is pulled up in the fastener closing direction, it is possible to attach the socket member 1 to the first plug member 2 after the opposite stringers s, s' are sewn near their folded portions to a garment when the concealed slide fastener is sewn to the garment, thus preventing the socket member 1 from interfering with the sewing operation. Further, since the resilience of the catch plate 5 and of the engaging tongue 9 is utilized, it is possible to insert the first plug member 2 into the socket member 1 in a very simple operation. Likewise it is possible to insert the second plug member 3 into the socket member 1 by utilizing the resilience of the catch plate 5 and of the resilient tongue 14. Since the socket member 1 and the slider 19 can be coupled together by the engaging mechanism, it is possible to bring the slider 19 into intimate contact with the socket member 1 accurately so that the smooth coupling and opening of the opposed stringers can be achieved. Furthermore, this method comprises inserting a first plug member 2, which is attached to one stringer s, through a slider 19 and into a socket member 1 in such a manner that the first plug member 2 is movable longitudinally in the socket member 1, inserting a second plug member 3, which is attached to the other stringer s', through the slider 19 and into the socket member 1, engaging the slider 19 and the socket member 1, moving the slider 19 and the socket member 1 on the concealed slide fastener within a predetermined range in the fastener closing direction, and moving only the slider 19 in the fastener closing direction to close the concealed slide fastener, and to separate the bottom end stop assembly, the slider 19 is brought into contact with the socket member 1 and is moved further with the socket member 1. Thus, the other stringer s' attached to the second plug member 3 can be threaded through and removed from the slider 19 and the socket member 1 in a very simple operation. The purpose of moving the socket member 1, together with the slider 19, on the fastener chain c in a predetermined range, is to eliminate the cause for any local uncoupling near the socket member 1 when the fastener chain c is closed by the slider 19 and to enable the inserting and removing of the second plug member 3 into and from the socket member 1 simply, which could not have been realized with the conventional art.

Claims: A separable bottom end stop assembly for a concealed slide fastener, comprising a socket member and a first plug member (2), the socket member (1) having an engaging projection (16) adapted to engage with an engaging recess (22) formed in a slider body (20) of the concealed slide fastener, characterized in that the first plug member (2) has a locking portion (17) and an engaging portion (18), the socket member (1) further having a catch plate (5) for engagement with the locking portion (17), and an engaging tongue (9) for engagement with the engaging portion (18), whereby said socket member (1) is movable with the slider body (20) within a predetermined range between a first position in which the engaging tongue (9) engages the engaging portion (18) and a second position in which the catch plate (5) engages the locking portion (17) when a slider (19) is pulled to slide on the concealed slide fastener in a fastener closing direction. A separable bottom end stop assembly according to claim 1, wherein said catch plate (5) is formed on a central upper portion of a rear wall (4) at an upper side of said socket member (1), said engaging tongue (9) projecting from a side wall (8) and said catch plate (5) define a first-plug-member insertion hole (6) of said socket member (1), a resilient tongue (14) of said socket member projecting from a side wall (13) and terminating in a resiliently deformable end portion and said catch plate (5) define a second-plug-member insertion hole (7), said engaging projection (16) has a hook-shaped end (15), and said locking portion (17) and said engaging portion (18) project outwardly and inwardly, respectively, from a lower end of said first plug member (2). A method of assembling a separable bottom end stop assembly according to claim 1 or 2 and of using it in conjunction with a concealed slide fastener, comprising the steps of: for the bottom end stop assembly, by inserting the first plug member (2), which is attached to one stringer (s), through a slider (19) and into the socket member (1) in such a manner that the first plug member (2) is movable longitudinally in the socket member (1); for using the bottom end stop: inserting a second plug member (3), which is attached to the other stringer (s'), through the slider (19) and into the socket member (1), engaging the slider (19) with the socket member (1), moving the slider (19) and the socket member (1) on the concealed slide fastener within a predetermined range in the fastener closing direction until said slider (19) disengages from said socket member (1) and moving only the slider (19) in the fastener closing direction to close the concealed slide fastener, and subsequently bringing the slider (19) into contact with the socket member (1), and moving said slider (19) further with said socket member (1), whereby the second plug member (3) may be removed from the socket member (1).

Inventors: FUDAKI TSUTOMU, FUDAKI, TSUTOMU
Applicants: YKK CORP, YKK CORPORATION
Application year: 1993
Main classification: A44B19
IPC codes: A44B19