JPWO2012164682A1 - Slide fastener with open fitting and injection mold - Google Patents

Abstract

  In the slide fastener (1) with a release fitting of the present invention, the box (33) is deeper than the tape end edge (11d) of the fastener tape (11) from the protruding end surface of the box (33). The punching recess (33d) is provided with a tape surrounding portion (33e) that surrounds one end (11e) of the fastener tape (11) within the punching recess (33d). As a result, even when the box (33) is enlarged, the substantial thickness of the box (33) is reduced by the thinning recess (33d). Wrinkles can be prevented from occurring. Further, it is possible to stabilize the position of the fastener tape (11) in the cavity space during injection molding, and to prevent the fastener tape (11) from being exposed on the surface of the box (33). Further, the tape surrounding portion (33e) secures the fixing area of the box (33) to the fastener tape (11), and the fixing strength of the box (33) is increased.

Description

  The present invention relates to a slide fastener having a butterfly stick, a box stick, and a break-and-fit insert provided with the box, and in particular, the box body injection-molded on the fastener tape is free from molding defects such as sink marks, and the box. The present invention relates to a slide fastener with a separation / insertion tool having a high fixing strength to a body fastener tape. Furthermore, the present invention relates to an injection mold capable of forming a box bar and a box body into a fastener tape.

  For example, in a conventional slide fastener used for the front part of clothing, for example, a split fitting is often provided at one end of the left and right fastener stringers. The open-fitting insert generally includes a butterfly stick fixed to a tape side edge of the fastener tape adjacent to one fastener stringer element row and a fastener tape tape adjacent to the other fastener stringer element row. The box has a box bar fixed to the side edge and a box disposed at one end of the box bar. The box has a butterfly insertion hole into which a butterfly bar can be inserted. It is installed.

  After such a separable fitting insert is disposed on the slide fastener, for example, after the slide fastener is closed, the slider is slid to the position where it abuts the box, and the left and right element rows are separated. The left and right fastener stringers can be pulled apart by pulling out the butterfly bar from the butterfly bar insertion hole of the box through the element guide path of the slider.

  Also, from the state where the left and right fastener stringers are separated from each other, after inserting the butterfly pin into the hinge pin insertion hole of the box body through the slider element guide path, the slider is engaged (separated from the box body). The sliding fastener can be closed by meshing the left and right element rows.

  Regarding such a slide fastener with a separation fitting, for example, in Japanese Patent Laid-Open No. 8-98707 (Patent Document 1), a box and a box made of a synthetic resin are separately molded and then the box is boxed. A separable fitting (box retrofit type) configured by attaching to a bar is disclosed.

  Japanese Patent Application Laid-Open No. 2007-97840 (Patent Document 2) discloses that a synthetic resin butterfly stick is molded and integrated into one fastener tape by injection molding, and the synthetic resin box stick and box are the other. There is disclosed a slide fastener having a break-off fitting that is formed and integrated with the fastener tape.

  In particular, the slide fastener described in Patent Document 2 has waterproofness by covering the tape surface of the fastener tape with a waterproof layer made of an elastomer resin. Furthermore, in the slide fastener of Patent Document 2, in order to firmly fix the butterfly stick to the fastener tape covered with such a waterproof layer, the butterfly extending from the side surface on the tape side of the butterfly stick toward the inner side of the tape. The stick fixing portion is secured across the tape front and back surfaces of the fastener tape so as to wrap one end edge of the fastener tape, thereby securing a large fixing area of the butterfly stick and the butterfly stick fixing portion with respect to the fastener tape.

  By the way, the slide fastener is often used in the opening of clothing such as groceries and miscellaneous goods, in addition to being used in the front body of clothing as described above. In recent years, taking advantage of the opening and closing function of the slide fastener, for example, connecting tools for connecting bird nets used in orchards, etc., and connecting fishing nets such as fishing nets and aquaculture nets Slide fasteners have come to be used as connecting tools.

  For example, International Publication No. 2010/140231 pamphlet (Patent Document 3) discloses a slide fastener mainly used as a connecting tool for connecting fishing nets. For example, as illustrated in FIG. 21, the slide fastener 70 described in Patent Document 3 is configured to be able to connect or separate between the net portions 91 of the fishing net 90. By using this, the fishing net 90 can be easily manufactured, assembled, and disassembled.

  The slide fastener 70 of Patent Document 3 includes a pair of fastener stringers 71 in which an element row 73 is arranged on left and right fastener tapes 72, a slider 80 that is slidable along the element row 73, and left and right fasteners. A stopper 81 disposed adjacent to the element row 73 at one end portion (front end portion) of the stringer 71, and disposed adjacent to the element row 73 at the other end portions (rear end portions) of the left and right fastener stringers 71. And a separation fitting 82. Further, the net portions 91 of the fishing net 90 are attached to the tape main portions of the left and right fastener tapes 72, respectively.

  Each of the left and right fastener stringers 71 includes a fastener tape 72 and a plurality of synthetic resin fastener elements 74 that are arranged at opposing tape side edges of the fastener tape 72 and constitute an element row 73. Each fastener element 74 includes a body portion fixed to the side edge portion of the tape, a neck portion extending outward from the tape so as to be constricted from the body portion, and further extending outward from the neck portion toward the tape. And an oval meshing head that bulges out (in the direction of the head) and a projecting piece protruding in the front-rear direction from the neck. Further, on the upper surface and the lower surface of the body portion of the fastener element 74, a recess 74a for reducing the cross-sectional area of the body portion of the fastener element 74 is provided.

  In particular, the fastener element 74 of Patent Document 3 is configured such that the cross-sectional area in the direction perpendicular to the tape width direction in the body portion where the concave portion 74a is formed is smaller than the minimum cross-sectional area in the neck portion. The strength of the neck portion of the fastener element 74 is higher than that of the body portion where the recess 74a is formed.

  The split fitting insert 82 of Patent Document 3 includes a butterfly pin 82 a fixed to a fastener tape 72 adjacent to a rear end portion of an element row 73 in the left fastener stringer 71, and an element row 73 in the right fastener stringer 71. A box bar (not shown) fixed to the fastener tape 72 adjacent to the rear end of the box bar, and a box body 82b formed integrally with the rear end of the box bar. In addition, a hinge pin insertion hole is formed in the half of the box 82b on the outer side of the tape from the first end surface (front end surface) facing the element row 73 along the tape length direction.

  In the slide fastener 70 of Patent Document 3 configured as described above, the sectional area of the body portion of the fastener element 74 is set smaller than the minimum sectional area of the neck portion as described above. Thus, for example, in the case where the slide fastener 70 in the closed state receives a strong lateral pulling force in the tape width direction and the fastener element 74 is damaged, the cross-sectional area is larger than that of the neck before breaking at the neck of the fastener element 74. The fastener element 74 can be broken with a small body portion.

  For example, in a situation where the fastener element 74 is damaged, if the neck portion of the fastener element 74 is broken, the broken fastener element 74 is still fixed to the fastener tape 72 unless the trunk portion is broken. It becomes. For this reason, when the slide fastener 70 is repaired by replacing the damaged fastener element 74 with a normal fastener element 74, the leg portion of the fastener element 74 is further broken and the fastener element 74 is removed from the fastener tape 72. Is required.

  On the other hand, in the slide fastener 70 of Patent Document 3, when the fastener element 74 is damaged due to a lateral pulling force or the like, the body of the fastener element 74 is broken before the neck as described above, and the damaged fastener The element 74 can be removed from the fastener tape 72 naturally. For this reason, when repairing the slide fastener 70, the work which removes the fastener element 74 becomes unnecessary, and it becomes possible to perform repair work more simply and efficiently.

JP-A-8-98707 JP 2007-97840 A International Publication No. 2010/140231 Pamphlet

  In slide fasteners used for fishing nets as described in Patent Document 3, for example, when swells in the typhoon or when large fish collide, between fishing net parts In order to maintain the connection state stably, it is required to significantly increase the meshing strength (lateral pulling strength) of the fastener element as compared with a general slide fastener used for clothing or the like.

  For this reason, slide fasteners used for fishing nets and the like have a large engagement strength by increasing the size of the fastener element, and improve the operability and usability of the slide fastener. In addition, when the fastener element is enlarged in order to obtain a high meshing strength, a slider that slides along the element row, a stopper that prevents the slider from falling off from the element row, and a release fitting are also included in the fastener element. Along with this, it was necessary to increase the size.

  However, for example, when the separation fitting is to be enlarged while maintaining the shape of the separation fitting inserted in a general slide fastener used for clothing or the like, it is necessary to form the separation fitting. As the synthetic resin increases, the weight and basic unit of the separation / insertion tool increase. Further, when injection-molding the opening / closing insert, there is a problem that a molding defect called sink due to heat shrinkage of the synthetic resin occurs remarkably in a thick box.

  Furthermore, in this case, since the mold used for injection molding of the separation / insertion tool, particularly the mold used for injection molding of the box and the box bar, is also enlarged, the synthetic resin is entirely formed in the cavity space of the mold. In order to stably inject the material, it is necessary to increase the injection pressure of the synthetic resin material. However, when the injection pressure of the synthetic resin material is increased and the box rod and the box body are injection-molded on the fastener tape, the injected synthetic resin material collides with the fastener tape and the position of the fastener tape is easily displaced. The position of the fastener tape becomes unstable in the cavity space of the mold. For this reason, the malfunction that a fastener tape may be exposed to the surface of the box stick after injection molding or a box may arise.

  In the conventional slide fastener, for example, the front and back surfaces of the fastener tape are pressed with pins (also referred to as core pins) in order to stabilize the position of the fastener tape in the cavity space of the mold during the injection molding of the box bar and the box. A method may be used.

  However, when injection molding is performed by pressing the fastener tape with a pin in the cavity space in this way, a hole corresponding to the pin is formed on the surface of the box after molding, which deteriorates the appearance quality of the split fitting. There was a problem of letting. Further, when the injection pressure for injecting the synthetic resin material at the time of injection molding is increased, there are cases where the fastener tape cannot be sufficiently pressed by the pins alone.

  Further, as another means for preventing the fastener tape from being exposed on the surface of the box bar or the box body after the injection molding, for example, it is conceivable to cut out the box bar of the fastener tape or a tape portion embedded in the box body. However, when a part of the fastener tape is cut in this way, the work of cutting the fastener tape in the manufacturing process of the slide fastener increases. In addition, there is a problem that the fixing area of the box body is reduced, and the fixing strength of the box rod and the box body required for uses such as fishing nets cannot be stably obtained.

  The present invention has been made in view of the above-described conventional problems. A specific object of the present invention is to prevent the occurrence of sink marks during injection molding even when the box is enlarged, and to provide a box after injection molding. It is to provide a slide fastener with a separable fitting that prevents the fastener tape from being exposed on the surface of the bar or box, and has a high fixing strength to the box bar and the box fastener tape. An object of the present invention is to provide an injection mold capable of forming a box bar and a box body arranged on a slide fastener with a separate opening / closing insert into a fastener tape.

  In order to achieve the above-mentioned object, the slide fastener with a separation / insertion tool provided by the present invention has, as a basic configuration, an element row arranged on the opposing tape side edges of the first and second fastener tapes. A pair of first and second fastener stringers, and at least one end of the first and second fastener stringers, and a break-and-fit insert provided with a butterfly bar, a box bar, and a box, The box body is provided with a release fitting that projects in the tape length direction from the tape edge of the first or second fastener tape on which the box body is disposed and is integrally formed with one end portion of the box bar. It is a slide fastener, and the box body is formed with a lightening recess formed from an end surface on the protruding side of the box to a position closer to the box bar than the tape edge of the fastener tape, and the lightening recess Within the said fas It is an most important characterized by having a tape surrounding portion which surrounds the end portion of the TAPE mode.

In the slide fastener with an opening and closing insert according to the present invention, the tape surrounding portion is provided with a gap between the upper and lower surfaces of the tape surrounding portion and the upper and lower wall surfaces of the lightening recess, and the bottom surface of the lightening recess. It is preferable to be arranged so as to protrude in the tape length direction.
Moreover, it is preferable that the said tape surrounding part is distribute | arranged over the whole tape width direction in the said hollow part recessed part. Furthermore, it is preferable that the said tape surrounding part has a dimension of the tape front-back direction larger than the said 1st and 2nd fastener tape.

  Further, in the slide fastener with a separation / insertion tool of the present invention, the box body is a butterfly stick that is drilled from the end surface on the element row side of the box body along the tape length direction and penetrates the end surface on the protruding side. It is preferable to have an insertion hole.

  Next, an injection mold provided by the present invention has a basic configuration in which one end portion of a fastener tape is integrally formed with a box rod and one end portion of the box rod, and the tape end of the fastener tape is formed. An injection mold having a fixed mold and a movable mold with a cavity space for molding a box projecting in the tape length direction from the edge, wherein the fastener is formed from an end surface on the projecting side of the box. A slide for forming a thinning recess formed in a position closer to the box bar than the tape edge of the tape, and a tape surrounding portion surrounding one end of the fastener tape in the thinning recess. The core member is disposed so as to be able to advance and retreat in the cavity space, and an extending portion branched and extended in a bifurcated manner with a concave portion having a shape corresponding to the tape surrounding portion interposed therebetween at the distal end portion of the slide core member Arranged It is an most important feature Rukoto.

  In the slide fastener with a break-fitting insert according to the present invention, the box constituting the break-fitting insert is deeper from the protruding end surface of the box to a position closer to the box bar than the tape edge of the fastener tape. It has a perforated hollow portion and a tape surrounding portion surrounding one end portion of the fastener tape in the thinned recess portion. In this case, it is preferable that the lightening recess is arranged in a half portion closer to the inside of the tape in the tape width direction of the box.

  Here, the half part closer to the tape inward in the tape width direction of the box means the tape inner side of the fastener tape when the box is cut along the tape length direction and divided into two. This is a box area. In this case, it is preferable that the half of the box inward of the tape and the half of the tape inward of the tape are separated by a substantially central portion in the tape width direction of the box. The near half and the half outside the tape need not have the same dimension in the tape width direction.

  In general, molding defects called sinks that occur in injection molding are caused by a large amount of heat shrinkage in the thick part of the molded product, or a difference in the cooling rate of the synthetic resin between the thick part and the thin part. It is known to occur due to the occurrence of

  Therefore, in the present invention, when the box rod and the box body are injection-molded on the fastener tape, the tape core edge of the fastener tape is used for the box body by using the slide core member that can advance and retreat into the cavity space of the box rod and the box body. A hollow portion having a bottom surface was provided at a position closer to the box bar. As a result, even if the box is enlarged, the portion where the wall thickness is substantially increased in the box is greatly reduced, and heat is released from the inside of the box via the slide core member during injection molding. Therefore, it is possible to effectively prevent the occurrence of sink marks in the box after injection molding. Furthermore, by providing a thinned recess in the box to reduce the wall thickness, the amount of synthetic resin necessary for molding the box can be reduced, and the weight of the box can be reduced and the basic unit can be reduced.

  Further, in this case, in the present invention, the tape surrounding portion is formed in the hollow portion of the box body, and therefore, the tip portion of the slide core member for forming the thin portion recess portion is sandwiched with the concave portion for accommodating the fastener tape. A branched bifurcated extension is provided. As a result, the fastener tape can be housed in the recess at the tip of the slide core during injection molding and the position of the fastener tape can be stabilized, so that the fastener tape is exposed on the surface of the molded box bar or box. It can prevent the appearance of the box body.

  Furthermore, by fixing the synthetic resin material between the distal end portion of the slide core and the fastener tape to form the tape surrounding portion, the fixed area of the box to the fastener tape is secured by the formed tape surrounding portion, The adhesion strength of the box bar and the box to the fastener tape can be increased.

  In such a slide fastener with a separation / insertion tool of the present invention, the tape surrounding portion includes an upper and lower surface intersecting the tape front and back direction of the tape surrounding portion, and an upper and lower wall surface intersecting the tape front and back direction of the lightening recess. A gap is provided between them, and it is arranged so as to protrude in the tape length direction from the bottom surface of the lightening recess. The tape surrounding portion configured as described above is easily formed by using the slide core member as described above, and one end portion of the fastener tape is securely embedded in the tape surrounding portion so that the box bar and the box body The fixing strength can be stably increased.

  Further, in the slide fastener with a separation / insertion tool according to the present invention, the tape surrounding portion is arranged over the entire tape width direction in the lightening recess. Thereby, while being able to ensure the intensity | strength of a tape surrounding part stably, it can also prevent that a fastener tape protrudes in a tape width direction from a tape surrounding part. Further, since the tape surrounding portion is arranged in a reinforcing rib shape between the left and right inner wall surfaces of the tape surrounding portion, the strength of the box can be increased by the tape surrounding portion.

  Furthermore, in the slide fastener with a break-and-insert insert of the present invention, the tape surrounding portion has a larger tape front and back dimension than the first and second fastener tapes. Thereby, since the one end part of a fastener tape is reliably accommodated in a tape surrounding part and the one end part of a fastener tape can be wrapped in a tape surrounding part, the high adhering strength of a box can be ensured stably.

  Furthermore, in the slide fastener with a break-and-insert insert of the present invention, the box is formed on the half of the box close to the tape width direction from the end surface on the element row side to the tape length. It has a butterfly pin insertion hole that is drilled along the vertical direction and penetrates the end face on the protruding side. By providing such a butterfly stick insertion hole, it is possible to further reduce the portion of the box where the wall thickness is substantially increased.

  Next, an injection mold according to the present invention is provided with a fixed die and a movable die having a cavity space for molding a box bar and a box body, and is arranged to be able to advance and retreat in the cavity space. And a slide core member for forming the punched recess and the tape surrounding portion. The tip of the slide core member is branched and extended in a bifurcated manner with a recess corresponding to the shape of the tape surrounding portion in between. The extended part is arranged.

  By performing injection molding using the injection molding die of the present invention, the outer shape of the box bar and the box body is formed into a desired shape using the fixed mold and the movable mold, and the slide core member is formed. Using, the box body can be stably molded with a lightening recess that is deeply drilled from the end surface on the protruding side of the box body to a position closer to the box bar than the tape edge of the fastener tape. The substantial thickness of the box can be reduced by reducing the amount of synthetic resin inside the box.

  Further, by molding the box using the slide core member, the heat of the synthetic resin can be released from the inside of the box through the slide core member during injection molding, and the entire box can be efficiently cooled. For this reason, it can prevent effectively that sink marks generate | occur | produce in the box after injection molding. Furthermore, since the cooling time in the injection molding process can be greatly shortened, the productivity of the slide fastener with a separation / insertion tool can be improved. Moreover, by providing the hollow portion in the box, it is possible to reduce the weight of the box and reduce the basic unit.

  In addition, since the distal end portion of the slide core member has an extending portion that extends in a bifurcated manner with the concave portion interposed therebetween, one end portion of the fastener tape is placed in the concave portion of the slide core member during injection molding. Since the position of the fastener tape can be stabilized by housing the fastener tape, it is possible to prevent the fastener tape from being exposed on the surface of the box bar or the box body after molding. Furthermore, since the synthetic resin material is spread between the front end portion of the slide core member and the fastener tape to form the tape surrounding portion, the tape surrounding portion secures the fixing area of the box to the fastener tape, and the fastener tape. It is possible to increase the fixing strength of the box bar and the box to the box.

FIG. 1 is a plan view showing a slide fastener with a break-fitting insert according to Embodiment 1 of the present invention. FIG. 2 is an enlarged plan view showing a meshing state of the fastener elements in the slide fastener. 3 is a cross-sectional view taken along the line III-III shown in FIG. FIG. 4 is a perspective view showing a butterfly stick included in the slide fastener. FIG. 5 is a perspective view showing a box bar and a box included in the slide fastener. FIG. 6 is a plan view of the box bar and the box. FIG. 7 is a schematic view of the box as viewed from the second end face (rear end face) side. 8 is a cross-sectional view taken along line VIII-VIII shown in FIG. 9 is a cross-sectional view taken along line IX-IX shown in FIG. 10 is a cross-sectional view taken along line XX shown in FIG. FIG. 11 is an explanatory diagram illustrating a relationship between the box body and the second slide core portion by showing a part of the box body in cross section. FIG. 12 is a cross-sectional view showing a box and a box bar formed using a slide core member. FIG. 13 is a cross-sectional view showing the box and the box bar after the slide core member is pulled out. FIG. 14 is a schematic diagram showing a state where the left and right fastener stringers are separated. FIG. 15 is a schematic diagram showing a state in which the butterfly stick is inserted into the element guide path from the shoulder of the slider. FIG. 16 is a schematic diagram showing a state in which the wing stick is inserted into the wing stick insertion hole of the box. FIG. 17 is a cross-sectional view illustrating a box according to a modification of the first embodiment. FIG. 18 is a cross-sectional view illustrating a box according to another modification of the first embodiment. FIG. 19 is a plan view showing a slide fastener with a break-fitting insert according to Embodiment 2 of the present invention. FIG. 20 is a plan view showing a state in which left and right fastener stringers in the slide fastener are separated. FIG. 21 is a plan view showing a conventional slide fastener used for a fishing net.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a plan view showing a slide fastener with a break-fitting insert according to the first embodiment. FIG. 2 is an enlarged plan view showing a meshing state of the fastener element, and FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. FIG. 4 is a perspective view of a butterfly stick, and FIG. 5 is a perspective view of a box stick and a box.

  In the following description, the tape length direction of the fastener tape is defined as the front-rear direction. In particular, in the first embodiment, the direction in which the slider is slid so as to be separated from the separation fitting insert is defined as the front, The direction of sliding toward the separation / insertion tool is the rear. Further, the tape width direction of the fastener tape is defined as the left-right direction, and in particular, the left side in the plan view of the slide fastener as shown in FIG. 1 is the left side, and the right side is the right side. Further, the tape front and back direction of the fastener tape is defined as the vertical direction, and the side on which the main handle of the slider is arranged is the upper side with respect to the tape surface of the fastener tape, and the opposite side is the lower side.

  The slide fastener 1 according to the first embodiment includes a pair of first and second fastener stringers 10a including element rows 12 at opposite tape side edges of left and right fastener tapes (first and second fastener tapes) 11. 10b, a slider 20 slidably arranged along the element row 12, a stopper 5 arranged at a desired position of the element row 12 in the first and second fastener stringers 10a, 10b, The second fastener stringer 10a, 10b has a separation / insertion tool 30 disposed at the rear end portion.

  Each of the first and second fastener stringers 10 a and 10 b includes a fastener tape 11 and a plurality of fastener elements 13 made of synthetic resin attached to a tape side edge of the fastener tape 11. Each of the left and right fastener tapes 11 is woven or knitted into a belt shape, and a tape main part 11a that is sewn to a fastener-attached product such as a fishing net, and an element attachment part (tape side edge) to which the fastener element 13 is attached. 11b.

  Further, a core string portion 11 c is disposed on the tape side edge of the fastener tape 11 on the element attachment portion 11 b side. In the present invention, the material of the fastener tape 11 is not particularly limited, and the same material as the fastener tape generally used in the conventional slide fastener can be adopted.

  In the left and right fastener tapes 11, a plurality of synthetic resin fastener elements 13 are arranged at regular intervals along the tape length direction by injection molding on the element mounting portion 11 b including the core string portion 11 c. The left and right element rows 12 are formed by the plurality of fastener elements 13.

  In the present invention, the material of the fastener element 13 is not limited. For example, a thermoplastic synthetic resin such as polyacetal, polyamide, polypropylene, polybutylene terephthalate, nylon, and polycarbonate can be suitably used. The made fastener element 13 is lighter than the made metal fastener element 13. The fastener element 13 of the first embodiment is made of polyacetal.

  In addition, the fastener element 13 of the first embodiment is configured to have substantially the same configuration as the fastener element described in Patent Document 3. More specifically, the fastener element 13 of the first embodiment includes a barrel portion 13a fixed to the element attachment portion 11b of the fastener tape 11 and a neck portion 13b extending outward from the tape so as to be confined from the barrel portion 13a. And a meshing head portion 13c that extends further outward from the neck portion 13b and bulges in an oblong shape in the front-rear direction, and a projecting piece portion 13d that protrudes in parallel with the tape surface of the fastener tape 11 from the neck portion 13b in the front-rear direction. And have.

  Furthermore, a groove 13e is formed along the tape length direction at the tip (top) of the meshing head 13c of the fastener element 13. The groove 13e is arranged at a substantially central portion in the tape front and back direction of the meshing head 13c, and when the left and right element rows 12 are meshed, the protruding piece 13d of the mating counterpart fastener element 13 is fitted. It is configured as follows. Thereby, it is possible to prevent the right and left fastener elements 13 in the meshing state from being displaced relative to each other in the vertical direction.

  In the fastener element 13 of the first embodiment, the area of the cross section perpendicular to the tape width direction in the upper half or the lower half of the body portion 13a is the minimum cross-sectional area in the neck portion 13b (the area of the cross section perpendicular to the tape width direction). Recessed portions 13f are provided on the upper surface side and the lower surface side of the body portion 13a.

  By arranging such a recessed portion 13f in the fastener element 13, for example, when the slide fastener 1 in a closed state receives a strong lateral pulling force in the tape width direction and the fastener element 13 is cracked, the fastener element 13 can be broken at a body portion 13 a having a smaller cross-sectional area than the neck portion 13 b, and the broken fastener element 13 can be easily detached from the fastener tape 11. For this reason, when repairing the slide fastener 1 after that, the operation | work which removes the fastener element 13 becomes unnecessary, and it becomes possible to perform a repair operation | work efficiently.

  Further, for example, when several years have passed after the slide fastener 1 is submerged in the sea, foreign matter such as algae and shellfish may adhere to the fastener element 13 and the like, thereby preventing the slider 20 from sliding. By providing the concave portion 13f as described above on the upper surface side and the lower surface side, when the slider 20 is slid, foreign matter enters the concave portion 13f, and the foreign matter causes the slider 20 to slide. Can prevent obstruction. In the present invention, the form of the fastener element 13 is not particularly limited, and can be arbitrarily changed as necessary.

  The slider 20 according to the first embodiment is configured in substantially the same manner as a slider that is generally used in the conventional slide fastener 1 with the separation / insertion tool.

  Specifically, the slider 20 of the first embodiment includes a slider body 21 and a handle (not shown) that is rotatably held by the slider body 21. The slider body 21 is close to each other from the left and right side edges of the upper and lower wing plates 22 and 23, the upper and lower wing plates 22 and 23, the guide pillar 24 that connects between one end portions (front end portions) of the upper and lower wing plates 22 and 23. It has left and right upper and lower flange portions 25 extending in the direction, and a handle attachment column 26 erected in a gate shape on the upper surface of the upper blade 22.

  Left and right shoulder openings are formed at the front end of the slider body 21 with the guide pillars 24 therebetween, and a rear opening is formed at the rear end of the slider body 21. A substantially Y-shaped element guide path 27 is formed between the upper and lower blades 22 and 23 to communicate the left and right shoulder openings with the rear opening. Further, the left and right fastener tapes 11 can be inserted between the left and right upper flange portions 25 that are suspended from the upper wing plate 22 and the left and right lower flange portions 25 that are erected from the lower wing plate 23. Possible gaps (also called tape grooves) are formed.

  In addition to the above-described configuration, the slider 20 used in the present invention is further provided with a handle attachment column on the lower surface of the lower wing plate 23 in the slider body 21, and is supplementary to the pull attachment column on the lower wing plate 23 side. It is also possible to hold the second handle so that it can rotate. Accordingly, the slider 20 can be configured to be operated from the upper surface side or the lower surface side of the slide fastener 1.

  In the present invention, the material of the slider 20 is not particularly limited, and for example, synthetic resins such as polyamide, polypropylene, and polyacetal, and metals such as aluminum alloy and zinc alloy can be used.

  In order to prevent the slider 20 from falling off the element row 12, the fasteners 5 in the first embodiment are arranged one by one in the left and right element rows 12, and the fastener member 6 is attached to the fastener element 13 at a desired position. It is comprised by inserting. The fastener member 6 is disposed on the cylindrical frame portion, the front and rear side surfaces of the frame portion, protrudes on the upper and lower inner wall surfaces of the frame portion, and is recessed in the fastener element 13. It has the fitting convex part fitted to the part 13f, and is comprised by the same synthetic resin as the fastener element 13 so that elastic deformation is possible.

  The break-off fitting 30 in the first embodiment includes a butterfly stick 31 disposed at the rear end portion of the left first fastener stringer 10a and a box rod disposed at the rear end portion of the right second fastener stringer 10b. 32 and a box 33 integrally formed at the rear end portion of the box bar 32. In the present invention, for example, the positional relationship between the butterfly stick 31, the box stick 32, and the box body 33 is reversed left and right, and the butterfly stick 31 is attached to the second fastener stringer 10b on the right side and the first left side is attached. It is also possible to constitute the separation / insertion tool 30 by attaching the box bar 32 and the box 33 to the fastener stringer 10a.

  The butterfly stick 31 in the separation fitting 30 of the first embodiment is arranged adjacent to the element row 12 so as to be continuous from the rear end portion of the element row 12 in the first fastener stringer 10a. It is fixed across both sides of the tape along the side edge of the tape. The opening / closing insertion tool 30 of the first embodiment including the butterfly stick 31 is formed by injection molding the same synthetic resin material as the fastener element 13 such as polyacetal.

  The butterfly stick 31 includes a butterfly stick main body 31a that is directly fixed to the fastener tape 11 and a butterfly stick reinforcement that extends inwardly from the side edge of the tape at the rear end of the butterfly stick main body 31a. Part 31b, element locking part 31c arranged to protrude in the tape width direction toward the tape outer side at the front end part of the butterfly stick main body part 31a, and the tape width from the side opposite to the box bar of the butterfly stick body part 31a It has the accommodation recessed part 31d dented in the direction.

  The butterfly pin body portion 31a of the butterfly pin 31 is configured to have a certain thickness (dimension in the tape front and back direction). The dimension of the butterfly pin body portion 31a in the tape front and back direction is the same as that of the fastener element 13. It is smaller than the dimension in the tape front and back direction, and larger than the interval between the upper and lower flange portions 25 formed on the slider 20.

  The butterfly bar reinforcing portion 31 b of the butterfly bar 31 is disposed across the tape front and back surfaces of the fastener tape 11 so as to wrap around the rear edge of the fastener tape 11 (region on the rear end side of the fastener tape 11). By providing this butterfly stick reinforcing portion 31b, the fixing strength of the butterfly stick 31 to the fastener tape 11 is increased, and the trailing edge of the fastener tape 11 is protected to cause fraying and damage to the tape. It is preventing.

  In addition, the element locking portion 31c of the butterfly stick 31 is the fastener element 13 (mostly disposed on the box bar 32 side in the element row 12 of the second fastener stringer 10b on the right side when the left and right element rows 12 are engaged with each other. Hereinafter, the fastener element 13 is referred to as the first element 13) and the box bar 32 so as to be engageable with the first element 13.

  That is, as shown in FIG. 14, for example, the element locking portion 31 c protrudes from the butterfly stick main body portion 31 a to the tape outer side, and fits into the neck portion 13 b of the first element 13. A notch 31f that is arranged at the front end of the rod 31 and that fits the meshing head 13c of the first element 13, and a projecting piece that projects into the notch 31f and fits into the groove 13e of the first element 13 31g.

  The accommodation recess 31d of the wing stick 31 is configured to be able to accommodate a locking projection 32b described later of the box bar 32. By accommodating the locking protrusion 32b of the box bar 32 in the receiving recess 31d, the butterfly bar 31 can be positioned with respect to the box bar 32, and when the left and right element rows 12 are engaged, the box bar It is possible to prevent the position of the butterfly stick 31 from shifting in the tape front and back direction with respect to 32.

  Further, in the butterfly stick 31 of the first embodiment, the upper and lower half portions of the butterfly stick body 31a are pinned on the front and back surfaces of the tape so as to position the fastener tape 11 during injection molding of the butterfly stick 31. A pin hole portion 31h formed by pressing the pin is provided. By providing such a pin hole portion 31h, the synthetic resin necessary for molding the butterfly stick 31 can be reduced, and the weight of the butterfly stick 31 can be reduced.

  The box bar 32 in the separation / insertion tool 30 of the first embodiment is arranged adjacent to the element row 12 so as to be continuous from the rear end portion of the element row 12 in the second fastener stringer 10b. It is fixed across both sides of the tape along the side edge of the tape.

  The box bar 32 includes a box bar main body portion 32a directly fixed to the fastener tape 11, and a locking portion protruding in the tape width direction from the side facing the butterfly bar toward the outside of the tape in the front end region of the box bar main body portion 32a. And a convex portion 32b. In addition, on the upper surface side half and the lower surface side half of the box bar 32 of the first embodiment, similarly to the butterfly bar 31, tape front and back surfaces are used to position the fastener tape 11 during the injection molding of the box bar 32. A pin hole portion 32c formed by pressing with a pin is arranged.

  In the first embodiment, the pin hole portion 32 c formed in the box bar 32 and the pin hole portion 31 h formed in the above-described butterfly bar 31 can be temporarily covered by the slider 20 and the box body 33. Yes (see, for example, FIG. 16), and thereby the influence on the appearance of the slide fastener 1 can be kept small.

  In the box bar 32 of the first embodiment, the dimension (thickness) in the tape front and back direction at the front end of the box bar main body 32 a is set smaller than the dimension in the tape front and back direction of the fastener element 13. Further, the box bar main body part 32a has an inclined part 32d (or a curved part) for gradually increasing the tape front and back dimension (thickness) of the box bar main body part 32a toward the rear end part (end part on the box 33 side). ) Are arranged on both the upper and lower surfaces, and the thickness of the rear end portion of the box bar main body portion 32a is set to the same size as the thickness of the fastener element 13 or slightly larger than the thickness of the fastener element 13. .

  When the dimension of the tape bar main body portion 32a in the tape front and back direction changes as described above in the tape length direction, for example, when the slider 20 is slid rearward and brought into contact with the box body 33, the box bar 32 is moved. The box bar 32 can smoothly enter the element guide path 27 of the slider 20 from the front end where the thickness is small. Further, when the slider 20 is held in contact with the box 33, the upper and lower blades 22 of the slider 20 are inserted by inserting the thick rear end portion of the box bar main body portion 32 a into the element guide path 27 of the slider 20. , 23 and the upper and lower surfaces of the rear end portion of the box bar main body 32a can be reduced, thereby preventing the slider 20 from rattling and the slider 20 coming into contact with the box 33. The stopped state can be stabilized.

  The box 33 in the separation / insertion tool 30 of the first embodiment is integrally formed at the rear end portion of the box bar 32 with a size in the front and back direction larger than that of the box bar 32 through a step. The rear end surface of the box 33 is arranged at a position protruding further rearward than the position of the tape rear end edge 11d of the fastener tape 11 in the second fastener stringer 10b. The box 33 includes a box body 33a having a rectangular parallelepiped outer shape, and a box reinforcement 33b extending further from the side of the box body 33a toward the tape inward side. Yes.

  The box body 33a is drilled in a substantially left half of the box body 33a, and is inserted into a butterfly pin insertion hole 33c into which the butterfly pin 31 can be inserted, and a substantially right half of the box body 33a. A thinned recess 33d that reduces the thick portion of the box body 33a, a tape surrounding portion 33e disposed in the thinned recess 33d, and a side surface of the box body 33a on the outer side of the tape. The slit part 33f cut into the is arranged.

  The butterfly stick insertion hole 33c is drilled along the tape length direction from the front end surface of the box body 33a and has a larger internal space than the butterfly stick 31. The butterfly pin insertion hole 33c is formed so as to penetrate from the front end face side to the rear end face side of the box body 33a, but the opening area on the rear end face side of the butterfly stick insertion hole 33c is the front end face. A rear wall 33g that closes a part of the butterfly pin insertion hole 33c is provided on the rear end face side of the box body 33a so as to be smaller than the opening area on the side, and the rear wall 33g The strength of the box 33 is increased. Since the butterfly pin insertion hole 33c is formed in the box body 33a, the substantially left half of the box body 33a has a hollow structure. The thickness (thickness of the portion filled with the synthetic resin) can be reduced.

  Further, the side (left side) of the box body 33a is cut in the tape length direction from the front end surface side of the box body 33a and communicates with the butterfly pin insertion hole 33c. A slit 33f is provided. The slit width of the slit portion 33f in the tape front / back direction is set to be larger than the tape front / back direction dimension of the butterfly rod reinforcing portion 31b of the butterfly pin 31, and the butterfly rod 31 is inserted into the butterfly rod insertion hole 33c of the box 33. Is inserted into the slit 33f of the box 33, the wing bar reinforcement 31b of the wing stick 31 interferes with the box body 33a. Can be avoided.

  The hollow recess 33d of the box body 33a is drilled forward from the rear end surface of the box body 33a along the tape length direction, and is a partition portion between the butterfly pin insertion hole 33c. 33h is provided and divided.

  As shown in FIG. 6, the bottom surface 33 i disposed at the front end of the lightening recess 33 d is in front of the position of the tape rear end edge 11 d of the fastener tape 11 in the second fastener stringer 10 b, and the box body portion. It is arranged behind the position of the front end face of 33a. In this case, the maximum dimension in the tape length direction from the rear end surface of the box 33 to the bottom surface 33i of the lightening recess 33d is defined as the depth of the lightening recess 33d. It is set larger than the dimension in the tape length direction from the rear end surface of the portion 33a to the position of the tape rear end edge 11d of the fastener tape 11.

  Since such a lightening recess 33d is formed in the substantially right half of the box body 33a, the substantially right half of the box body 33a has a hollow structure. The substantial wall thickness can be reduced. Further, since the amount of the synthetic resin necessary for molding the box 33 can be reduced, the box 33 can be reduced in weight and the basic unit can be reduced. In particular, in the first embodiment, the thinning recess 33d is arranged along the tape length direction together with the butterfly stick insertion hole 33c, so that the substantial thickness of the box 33 can be efficiently reduced. Can do.

  Furthermore, the strength of the box body portion 33a having a hollow structure can be increased by providing the partition portion 33h between the butterfly pin insertion hole portion 33c and the lightening recess portion 33d. In the present invention, for example, when the strength is sufficiently ensured by the material of the box 33 or the like, the partition portion 33h between the butterfly pin insertion hole portion 33c and the lightening recess portion 33d can be eliminated. is there.

  In this case, the upper wall surface 33j and the lower wall surface 33k of the lightening recess 33d are formed in an inclined surface such that the gap in the tape front and back direction of the lightening recess 33d gradually decreases toward the bottom surface. A draft for pulling out the slide core member 40 when the rod 32 and the box 33 are formed is provided.

  As shown in FIG. 6, the tape surrounding portion 33e disposed in the lightening recess 33d has a bottom surface 33i of the lightening recess 33d so as to surround the tape portion protruding into the lightening recess 33d of the fastener tape 11. And projecting in the tape length direction. As shown in FIG. 10, the tape surrounding portion 33e is disposed at a substantially central portion in the tape front and back direction of the thinning recess 33d with a predetermined thickness over the entire tape width direction in the thinning recess 33d. A gap is provided between the upper and lower surfaces 33m, 33n of the tape surrounding portion 33e and the upper and lower wall surfaces 33j, 33k of the lightening recess 33d.

  In this way, the tape surrounding portion 33e is formed thicker than the fastener tape 11 with a predetermined thickness in the front and back direction of the tape, thereby providing a thinned recess portion 33d and the thickness of the box 33 (the synthetic resin is filled). Even when the thickness of the tape portion 33) is reduced, the tape surrounding portion 33e can reliably wrap around the rear edge of the fastener tape 11, thereby ensuring a large fixing area of the box 33 to the fastener tape 11. Thus, a high fixing strength of the box 33 can be obtained stably.

  Further, since the tape surrounding portion 33e is arranged in the entire tape width direction between the left and right inner wall surfaces of the thinned concave portion 33d, the strength of the tape surrounding portion 33e is increased and the tape surrounding portion 33e itself is damaged. This can be prevented, and the tape surrounding portion 33e functions as a reinforcing rib of the box 33, and the strength of the box 33 is also increased.

  The box reinforcing part 33 b in the box 33 is disposed across the tape front and back surfaces of the fastener tape 11 so as to wrap around the rear edge of the fastener tape 11. By providing the box reinforcing portion 33b, the fixing strength of the box 33 to the fastener tape 11 is further increased, and the rear edge of the fastener tape 11 is protected to cause fraying and damage of the tape. Is preventing.

The box bar 32 and the box 33 according to the first embodiment are integrally formed with the fastener tape 11 by injection molding using the following mold.
Molds for forming the box bar 32 and the box body 33 include a fixed mold and a movable mold having a cavity space for molding the box bar 32 and the box body 33, a butterfly bar insertion hole 33 c and a slit in the box body 33. The first slide core portion disposed to be able to advance and retreat in the cavity space to form the portion 33f, and the space to be reciprocated in the cavity space to form the thinning recess 33d and the tape surrounding portion 33e in the box 33. And a second slide core portion.

  In this case, the movable mold is arranged to be movable in the mold clamping and mold opening directions with respect to the fixed mold. Further, on the inner surface (cavity surface) of the fixed mold and the movable mold, a pin for pressing and positioning the fastener tape 11 at the time of injection molding is provided at a position where the box bar 32 is formed (in the pin hole portion 32c of the box bar 32). Projecting corresponding to the position).

  In addition, the first slide core part that forms the butterfly pin insertion hole part 33c and the slit part 33f includes a slide core member that is inserted into the cavity space from the front end face side of the box body 33, and a rear end face of the box body 33. And a slide core member inserted into the cavity space from the side.

  As shown in FIG. 11, the second slide core portion that forms the lightening concave portion 33 d and the tape surrounding portion 33 e is a slide core arranged so as to be inserted into the cavity space from the side that becomes the rear end surface of the box 33. A member 40 is provided. The slide core member 40 of the second slide core portion includes a slide core main body portion 41 and a bifurcated extension portion 42 that extends from the distal end portion of the slide core main body portion 41.

  The slide core main body portion 41 of the second slide core portion is formed in a substantially rectangular parallelepiped shape, and the upper and lower surfaces of the slide core main body portion 41 are arranged in the vertical direction in the slide core main body portion 41 to provide a draft angle. It is comprised by the inclined surface which a dimension reduces gradually toward a front-end | tip. A recessed portion 43 having a shape corresponding to the tape surrounding portion 33e is disposed between the extended portions 42 branched in a bifurcated shape, and this recessed portion 43 is located on the side of the tape side edge of the fastener tape 11 during injection molding. A rear end edge portion 11e (region on the rear end side of the fastener tape 11) is accommodated therein, and a space filled with a synthetic resin material is formed between the accommodated fastener tape 11 and the extension portion 42. It is provided to be.

  When the box bar 32 and the box 33 are injection-molded on the fastener tape 11 using such a molding die, first, the fixed mold and the movable mold with the fastener tape 11 inserted between the fixed mold and the movable mold. And the slide core members 40 of the first and second slide core parts are advanced into the cavity space formed between the fixed mold and the movable mold.

  At this time, the fastener tape 11 is positioned by pressing the front and back surfaces of the tape with pins arranged in a fixed type and a movable type, and the rear end edge portion 11e of the fastener tape 11 is a slide core member 40 of the second slide core portion. (See FIG. 11). As a result, the position of the fastener tape 11 in the cavity space is stabilized, so that the range in which injection conditions such as injection pressure can be set is widened, and the degree of freedom in injection molding is increased. And the quality of the box 33 can be stabilized.

  Next, the thermoplastic synthetic resin material heated and melted is injected and filled in the cavity space at a predetermined injection pressure. At this time, by controlling the injection pressure or the like of the synthetic resin material, it is possible to suppress the occurrence of defects such as water wrinkles in the molded product. Further, since the fastener tape 11 in the cavity space is held by the fixed and movable pins and the concave portion 43 of the second slide core portion as described above, even if the injected synthetic resin material is subjected to flow. Large displacement can be prevented, and the tape position of the fastener tape 11 in the cavity space can be maintained within a predetermined region.

  After the cavity space is filled with the synthetic resin material, the synthetic resin material is cooled, so that the box bar 32 and the box body 33 of the first embodiment are obtained in a state of being fixed to the fastener tape 11. At this time, since the slide core members 40 of the first and second slide core portions are inserted into the synthetic resin constituting the box 33, the heat of the synthetic resin is passed through these slide core members 40. Can be easily escaped. In particular, as shown in FIG. 12, in the second slide core portion, the contact area between the slide core member 40 and the synthetic resin is increased by the concave portion 43 disposed at the tip portion of the slide core member 40. Heat can be released more efficiently.

  Thereby, the cooling rate of the synthetic resin constituting the box 33 can be increased, and furthermore, the entire box 33 can be cooled relatively uniformly by releasing heat from the inside of the box 33 via the slide core member 40. Can do. As a result, coupled with the fact that the box 33 is provided with the butterfly pin insertion hole 33c and the thinning recess 33d to reduce the substantial thickness of the box 33, the sink which causes molding defects is formed in the box 33. Generation | occurrence | production can be prevented effectively and generation | occurrence | production of defects, such as a hot water wrinkle, can be suppressed further. Furthermore, since the cooling rate of the synthetic resin is increased, the cooling time in the injection molding process can be greatly shortened, so that the productivity of the slide fastener 1 can be improved.

  Then, after the synthetic resin is cooled, the slide core member 40 of the first and second slide core portions is pulled out from the molded product (see, for example, FIG. 13), and further, the fixed mold and the movable mold are opened, The box bar 32 and the box 33 according to the first embodiment having the above-described form are obtained.

  Even when the box bar 32 and the box body 33 formed by such an injection molding process have a size larger than that of a slide fastener opening / closing insert used for clothing or the like, The generation of wrinkles can be remarkably reduced, and the upper and lower surfaces of the box 33 are formed smoothly, so that the appearance (appearance quality) of the box 33 is good. Furthermore, since the position of the fastener tape 11 inside the box bar 32 and the box body 33 is also stable, the fastener tape 11 is prevented from being exposed on the surface of the box bar 32 or the box body 33 to become a defective product, and slide. The yield of the fastener 1 can be greatly improved.

  In the present invention, the injection molding process of the box bar 32 and the box body 33 as described above can be performed simultaneously with the injection molding process of the fastener element 13 of the second fastener stringer 10b, and if necessary. It is also possible to perform before and after the injection molding process of the fastener element 13.

  The slide fastener 1 with the break-off fitting 30 according to the first embodiment configured as described above meshes the element row 12 from the state where the left and right first and second fastener stringers 10a and 10b are separated, for example. In order to do this, as shown in FIG. 14, the slider 20 is first moved to the sliding rear end position where it abuts against the box 33.

  At this time, the inclined portion 32d (or curved portion) is arranged on the box bar main body 32a of the box bar 32 as described above, and the tape front and back at the rear end (box body side end) of the box bar main body 32a. The direction dimension is set to be larger than the front end portion (element row side end portion). As a result, when the slider 20 is slid to the sliding rear end position, the rear end portion of the box bar main body portion 32a is inserted into the element guide path 27 of the slider 20, and the slider 20 rattles (particularly, ), And the stop state of the slider 20 can be stably maintained.

  Next, as shown in FIG. 15, the butterfly stick 31 is inserted from the shoulder opening of the slider 20 toward the butterfly stick insertion hole 33 c of the box 33 through the element guide path 27 of the slider 20. At this time, the butterfly bar reinforcing portion 31 b of the butterfly bar 31 is inserted into a gap formed between the upper and lower flange portions 25 of the slider 20. Furthermore, as shown in FIG. 16, by inserting the butterfly stick 31 deeply, the rear end portion of the butterfly stick 31 is inserted into the butterfly stick insertion hole 33 c of the box 33 and accommodated.

  At this time, the locking projection 32 b of the box bar 32 is received in the receiving recess 31 d of the butterfly bar 31, and the rear end of the butterfly bar reinforcing part 31 b and the butterfly bar main body 31 a of the butterfly bar 31 is connected to the box 33. By contacting the rear end surface of the slit portion 33 f and the rear wall portion 33 g of the box 33, the butterfly stick 31 is positioned at a predetermined position with respect to the box stick 32 and the box 33, and the butterfly stick 31 is moved to the box stick 32. It is held in an opposed state. Thereafter, the slider 20 is slid forward toward the stopper 5 to engage the left and right element rows 12 as shown in FIG.

  On the other hand, when the first and second fastener stringers 10a and 10b are separated from each other from the state in which the left and right element rows 12 are engaged as shown in FIG. After moving to the end position, the butterfly stick 31 may be extracted from the butterfly stick insertion hole 33c of the box 33 via the element guide path 27 of the slider 20.

  Such a slide fastener 1 with the separation / insertion tool 30 according to the first embodiment has a box 33 even if the size of the separation / insertion tool 30 is increased in accordance with the size of the fastener element 13, for example. In addition, since it is possible to prevent the occurrence of sink marks and hot water wrinkles, the slide fastener 1 can be easily constructed by increasing the size of the fastener element 13 so as to have a high meshing strength and in which a molding failure does not occur in the split fitting insert 30. can do.

  For this reason, the slide fastener 1 of the first embodiment is, for example, a slide fastener for connecting a fishing net such as a stationary net that requires a relatively high engagement strength, or a slide fastener for connecting a bird net used in an orchard or the like. Preferably used.

  In addition, the slide fastener with a separation / insertion tool according to the present invention is not limited to the above-described first embodiment and the second embodiment described later, and has substantially the same configuration as the present invention, and Various modifications are possible as long as the same effects are obtained.

  For example, the box constituting the separation / insertion tool is provided with a hollow portion formed deeper than the tape rear end position of the fastener tape from the rear end surface of the box body, and the hollow portion. If it has the tape surrounding part which surrounds the rear-end part, as shown, for example in FIG.17 and FIG.18, you may have a form different from the box 33 in above-mentioned Example 1. FIG. .

  For example, the box 35 according to the modified example shown in FIG. 17 has a depth of the lightening recess 35d formed in the box 35 (the length from the rear end surface of the box 35 to the bottom surface 35i of the lightening recess 35d). ) Is deeper than that of the first embodiment. By forming the thinned recess 35d in this way, the substantial thickness of the box 35 can be further reduced, and the entire box 35 can be removed in the injection molding process of the box bar 32 and the box 35. It is possible to cool more uniformly and more efficiently. For this reason, it can prevent more reliably that a sink mark and a hot water wrinkle arise in the box 35 after shaping | molding.

  In this case, if the depth of the lightening recess 35d is increased too much, the dimension in the tape length direction from the front end surface of the box 35 to the bottom surface 35i of the lightening recess 35d is reduced, and the strength of the box 35 is increased. There is a risk that the extension portion 42 of the slide core member 40 becomes thin and is likely to be chipped. For this reason, the depth of the thinned recess 35d is such that, for example, the tape length direction dimension from the front end surface of the box 35 to the bottom surface 35i of the thinned recess 35d is reduced from the upper surface (or lower surface) of the box 35. It is preferably set to be larger than the dimension in the tape front and back direction to the upper wall surface (or lower wall surface) of the recess 35d.

  Further, in the box body 37 according to another modification shown in FIG. 18, the tape surrounding portion 37e surrounding the fastener tape 11 in the thinning recess portion 37d is similar to the tape surrounding portion 33e of the first embodiment described above. A gap is provided between the tape surrounding portion 37e and the left side wall surface (wall surface on the partitioning portion 37h side) of the cutout concave portion 37d. Even with the box body 37 configured in this way, the same effects as in the case of the box body 33 of the first embodiment described above, such as the prevention of sink marks and hot water wrinkles and the increase in the fixing strength of the box body 37, are obtained. It is done.

  FIG. 19 is a plan view showing a slide fastener with a break-fitting insert according to the second embodiment, and FIG. 20 is a plan view showing a state where left and right fastener stringers in the slide fastener are separated. In addition, in this Example 2, about the member which has the structure similar to the slide fastener of above-mentioned Example 1, it shall suppose that the description is abbreviate | omitted by using the same code | symbol.

  In the slide fastener 2 according to the second embodiment, the left and right first and second fastener stringers 10a and 10b are configured in the same manner as in the first embodiment described above, but the first and second fastener stringers 10a and 10b. In both of the front end portion and the rear end portion, the opening and closing inserts 50 and 60 are arranged, and the pair of front and rear first and second sliders 20a and 20b are arranged in the element row 12 so that the shoulder sides face each other. It is arranged to be slidable along.

  In this case, the separation / insertion tool 60 disposed at the rear end of the slide fastener 2 and the second slider 20b disposed on the rear side are the same as the separation / insertion tool 30 and the slider 20 in the first embodiment. It is configured.

  Further, the separation / insertion tool 50 disposed on the front end portion of the slide fastener 2 and the first slider 20a disposed on the front side have the front / rear direction of the separation / insertion tool 30 and the slider 20 in the first embodiment described above. Although configured to be reversed left and right, the substantial configurations of the separation / insertion tool 50 and the first slider 20a other than the arrangement direction are the same as those in the first embodiment.

  Therefore, in the second embodiment, the separation / insertion tool 50 disposed at the front end of the slide fastener 2 and the separation / insertion tool 60 disposed at the rear end include the butterfly stick 31 and the box of the first embodiment. It has butterfly bars 51 and 61, box bars 52 and 62, and box bodies 53 and 63 corresponding to the bar 32 and the box body 33, respectively.

  In such a slide fastener 2 of the second embodiment, for example, as shown in FIG. 19, the left and right element rows 12 are engaged and the slide fastener 2 is closed, as shown in FIG. When the first and second fastener stringers 10a and 10b are separated, the front and rear first and second sliders 20a and 20b are respectively brought into contact with the box 53 on the front end side and the box 63 on the rear end side, respectively. After moving to the contact position, in each of the opening / closing fittings 50 and 60 on the front end side and the rear end side, the butterfly bars 51 and 61 are first and secondly inserted from the butterfly bar insertion holes of the box bodies 53 and 63. The two sliders 20a and 20b may be extracted through the element guide path.

  On the other hand, when the element row 12 is engaged from the state where the left and right first and second fastener stringers 10a and 10b are separated (FIG. 20), first, the first and second sliders 20a and 20b are respectively moved to the front end. It moves to the position which contacts the box 53 on the part side and the box 63 on the rear end side. Next, in each of the opening and closing inserts 50 and 60 on the front end side and the rear end side, the butterfly bars 51 and 61 are inserted and accommodated in the butterfly bar insertion holes of the box bodies 53 and 63. The first and second sliders 20a and 20b are slid away from the box bodies 53 and 63, respectively. As a result, the left and right element rows 12 can be engaged as shown in FIG.

  As described above, even in the slide fastener 2 with the opening and closing inserts 50 and 60 according to the second embodiment, the above-described implementations such as prevention of sink marks and hot water wrinkles and an increase in the fixing strength of the box bodies 53 and 63 are described. The same effects as those of the slide fastener 1 with the separation fitting 30 according to Example 1 are obtained.

  In the slide fastener 2 according to the second embodiment, the separation / insertion tool 50 on the front end side and the separation / insertion tool 60 on the rear end part side are arranged in a point-symmetrical relationship, and the first fitting on the left side. The fastener stringer 10a is attached with the box bar 52 and the box 53 in the front end side separation / insertion tool 50, and the butterfly bar 61 in the rear end part side separation / insertion tool 60.

  However, in the present invention, the positional relationship between the left and right of the butterfly bar, the box bar, and the box body in the separation / insertion tool can be arbitrarily changed. For example, in a slide fastener in which opening and closing inserts are arranged at both front and rear ends of the first and second fastener stringers, the opening and closing inserts on the front end side and the opening and closing inserts on the rear end side are lined up. Arranged symmetrically, the first fastener stringer on the left side has a butterfly pin (or a box bar and a box) on the front end side and a butterfly bar on the rear end side. (Or a box bar and a box) may be attached.

DESCRIPTION OF SYMBOLS 1 Slide fastener 2 Slide fastener 5 Stopper 6 Stopper member 10a 1st fastener stringer 10b 2nd fastener stringer 11 (1st and 2nd) Fastener tape 11a Tape main part 11b Element attachment part 11c Core string part 11d Tape rear edge 11e Rear edge portion 12 Element row 13 Fastener element 13a Body portion 13b Neck portion 13c Engagement head portion 13d Projection piece portion 13e Groove portion 13f Recessed portion 20 Slider 20a, 20b First and second sliders 21 Slider body 22 Upper blade 23 Lower blade Plate 24 Guide pillar 25 Flange part 26 Pulling attachment pillar 27 Element guide path 30 Separation / insertion tool 31 Butterfly stick 31a Butterfly stick body part 31b Butterfly stick reinforcement part 31c Element locking part 31d Accommodation recess 31e Insertion part 31f Notch 31 Projection piece 31h Pin hole portion 32 Box rod 32a Box rod main body portion 32b Locking convex portion 32c Pin hole portion 32d Inclined portion 33 Box body 33a Box body main body portion 33b Box body reinforcement portion 33c Butterfly rod insertion hole portion 33d Meat hollow portion 33e Tape surrounding part 33f Slit part 33g Rear wall part 33h Partition part 33i (Bottom of concave part) Bottom wall surface 33j (Wall part of concave part) Upper wall surface 33k (Thick part of concave part) Upper wall surface 33m (Tape part of concave part) Upper surface 33n Lower surface of tape surrounding portion 35 Box body 35d Thinned recess portion 35i Bottom surface of thinned recess portion 37 Box body 37d Thinned recess portion 37e Tape surrounding portion 40 Slide core member 41 Slide core body portion 42 Extension portion 43 Recessed portion 50 Opening Insertion tool 51 Butterfly stick 52 Box stick 53 Box body 60 Separate fitting insert 61 Butterfly stick 62 Box stick 63 Box

Claims (6)

A pair of first and second fastener stringers (10a, 10b) in which an element row (12) is arranged on opposite side edges of the first and second fastener tapes (11), and the first and second fasteners The stringer (10a, 10b) is disposed on at least one end of the stringer and includes a butterfly stick (31, 51, 61), a box stick (32, 52, 62), and a box (33, 35, 37, 53, 63). The box (33, 35, 37, 53, 63) is arranged with the box (33, 35, 37, 53, 63). A separable fitting (1), which is formed integrally with the box bar (32, 52, 62) so as to protrude in the tape length direction from the tape edge (11d) of the first and second fastener tapes (11). (30,50,60) with slide fastener (1,2)
The box (33, 35, 37, 53, 63) is a tape edge (11d) of the fastener tape (11) from the end surface on the protruding side of the box (33, 35, 37, 53, 63). A hollow portion (33d, 35d, 37d) drilled to a position closer to the box bar (32, 52, 62) than the above-mentioned fastener tape (33d, 35d, 37d) 11) A slide fastener with a release fitting, characterized in that it has a tape surrounding portion (33e, 37e) surrounding one end portion (11e) of 11).   The tape surrounding portion (33e) is provided with a gap between the upper and lower surfaces (33m, 33n) of the tape surrounding portion (33e) and the upper and lower wall surfaces (33j, 33k) of the lightening recess (33d). The slide fastener with a break-off fitting tool according to claim 1, wherein the slide fastener is provided so as to protrude in the tape length direction from the bottom surface (33i) of the lightening recess (33d).   3. The slide fastener with a break-off fitting tool according to claim 1, wherein the tape surrounding portion (33 e) is arranged over the entire tape width direction in the lightening recess (33 d).   The said tape surrounding part (33e) has a size of the tape front-and-back direction larger than the said 1st and 2nd fastener tape (11), The separation fitting insert in any one of Claims 1-3 Slide fastener.   The box (33) is a butterfly pin insertion hole (33c) that is drilled along the tape length direction from the end surface on the element row (12) side of the box (33) and penetrates the end surface on the protruding side. The slide fastener with a break-and-fit insert according to any one of claims 1 to 4. At one end of the fastener tape (11), the box bar (32, 52, 62) and the one end of the box bar (32, 52, 62) are integrally molded, and the tape edge of the fastener tape (11) ( 11d) is an injection mold having a fixed mold and a movable mold with a cavity space for molding a box (33, 35, 37, 53, 63) protruding in the tape length direction. ,
From the end face on the protruding side of the box (33, 35, 37, 53, 63) to a position closer to the box bar (32, 52, 62) than the tape edge (11d) of the fastener tape (11) A hollow portion (33d, 35d, 37d) to be drilled and a tape surrounding portion (33e) surrounding one end portion (11e) of the fastener tape (11) in the hollow portion (33d, 35d, 37d). , 37e) and a slide core member (40) is disposed in the cavity space so as to be able to advance and retreat,
An extension part (42) branched and extended in a bifurcated manner with a concave part (43) having a shape corresponding to the tape surrounding part (33e, 37e) in between is provided at the tip of the slide core member (40). Arranged,
An injection mold characterized by that.

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