zipper

Abstract

The present invention provides a zipper that can make it difficult for an insert rod to get stuck in a slider and a socket body during the insertion operation of an insert rod. The zipper includes: a pair of zipper tooth chain tapes, which are provided with a chain tooth row; a slider; and a separation insert, which is arranged adjacent to one end of the chain tooth row, the zipper tape includes: a tape body; a chain tooth mounting portion, which is provided for the zipper chain tooth to be mounted; and a tape bending portion, which is roughly U-shaped and is arranged between the tape body and the chain tooth mounting portion, the separation insert includes an insert rod, a socket rod and a socket body, in the zipper, the zipper tape has an insert rod mounting portion, the insert rod mounting portion is provided for the insert rod to be mounted, and one end in the tape width direction has a bent shape, and the insert rod mounting portion has the following cross-sectional deformation portion: the cross-sectional shape changes in the tape length direction from the insert rod base end toward the insert rod top end.

Description

Technical Field

[0001] The invention relates to a hidden zipper. Background Art

[0002] As a type of zipper, there is known a hidden type zipper (hereinafter referred to as a hidden type zipper) which is provided in the following form: the chain element row is hidden by the zipper tape in a manner that is not visible or difficult to be seen from the outer surface side of the zipper. In the hidden zipper, in order to hide the chain element row, the zipper tape generally includes: a tape body portion; a chain element mounting portion, on which the zipper chain elements of the chain element row are mounted; and a tape bending portion, which is arranged between the tape body portion and the chain element mounting portion and is bent into a substantially U-shape.

[0003] In addition, there is a case where a zipper has a separation insert in order to separate the left and right zipper chain tapes from each other and to space them apart when the left and right chain teeth are separated. The separation insert mainly includes: an insert rod, which is installed on one side of the zipper chain tape; a socket rod, which is installed on the other side of the zipper chain tape; and a socket body, which is formed integrally with the socket rod and has a receiving portion for receiving the insert rod.

[0004] For example, Chinese Utility Model No. 203986430 (Document 1) discloses an insert for improving the horizontal pulling strength of a slide fastener. In addition, Japanese Utility Model Registration No. 3188025 (Document 2) discloses a separate insert used for a concealed slide fastener. Summary of the invention

[0005] For example, when the insert rod described in the document 1 is used to separate the insert to form a hidden zipper, when the insert rod is inserted into the interior of the slider (chain tooth guide path) to accommodate it in the socket body of the separated insert, the above-mentioned roughly U-shaped belt bending portion of the zipper tape is easy to open.

[0006] In this case, since a force in the direction of opening the bent portion of the zipper tape is generated, the direction (posture) of the insert rod rotates following the force of the zipper tape when observing the cross section of the zipper tape perpendicular to the tape length direction (hereinafter, the situation where the insert rod rotates like this is sometimes described as the insert rod rolling). As a result, the insert rod gets stuck in the slider or the socket body when inserting the insert rod into the socket body of the separation insert, and there is a situation where the insert rod cannot be inserted to the prescribed storage position in the socket body to be properly stored. Therefore, the operability of the separation insert is reduced.

[0007] On the other hand, in the case of an invisible zipper having a separating insert of the document 2, when observing a cross section of the separating insert perpendicular to the length direction of the tape, the insert rod and the socket rod are fixed in such a way as to cover the zipper tape with a larger range. Specifically, in the document 2, the tape facing portions of the left and right zipper tapes that face each other are covered from the outside by the insert rod and the socket rod, respectively. In this case, when the left and right chain teeth are engaged, the portions of the insert rod and the socket rod that cover the zipper tape are sandwiched between the left and right zipper tapes. Therefore, even if the left and right chain teeth are engaged, there is a situation in which a gap is easily formed between the left and right zipper tapes in the portions of the left and right zipper tooth chain tapes that are adjacent to the separating insert. As a result, there is a possibility that the concealment of the hidden chain teeth of the invisible zipper is partially reduced.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a slide fastener which can suppress the reduction in concealment of the fastener element row and can make it difficult for the insert pin to be caught in the slider and the socket body during the insertion operation of the insert pin.

[0009] In order to achieve the above-mentioned purpose, the present invention provides a zipper, which includes: a pair of zipper tooth chain tapes, which are obtained by respectively setting chain tooth rows on the zipper tapes; a slider, which is installed on the chain tooth rows in a slidable manner; a separation insert, which is arranged adjacent to one end of the chain tooth row, the zipper tape includes: a tape body; a chain tooth mounting portion, on which the zipper chain teeth of the chain tooth row are installed; and a tape bending portion, which is arranged between the tape body and the chain tooth mounting portion and bent into a roughly U shape, the separation insert includes: an insert rod, which is set on a pair of the A zipper tape on one side of a zipper tape; and a socket rod and a socket body, which are arranged on the other side of a pair of zipper tapes, the zipper is characterized in that: the zipper tape has an insert rod mounting portion, the insert rod mounting portion is for the insert rod to be mounted and one end portion in the tape width direction has a bent shape, the insert rod mounting portion of the zipper tape has the following cross-sectional deformation portion: the cross-sectional shape of the insert rod mounting portion that is orthogonal to the tape length direction changes in the tape length direction as it moves from the insert rod base end portion of the insert rod close to the chain tooth row toward the insert rod top end portion away from the chain tooth row.

[0010] In the slide fastener according to the present invention, preferably, in the cross-sectional deformation portion of the pin mounting portion, the cross-sectional shape of the fastener tape changes from a substantially U-shape to a substantially L-shape in the tape length direction.

[0011] In addition, preferably, in a cross-sectional view of the insert rod that is orthogonal to the length direction of the tape, the insert rod includes: a lower plate portion that supports the side edge of the zipper tape; an outer wall portion that stands up from a side edge portion in the width direction of the lower plate portion; and an upper plate portion that extends in a bent manner from an upper end portion of the outer wall portion, the upper plate portion having a lateral width reducing portion, the dimension of which extending from the outer wall portion along the tape width direction in a top view of the insert rod decreases as it moves toward the top end portion of the insert rod.

[0012] In the zipper of the present invention, the insert rod preferably includes: a slit portion, which is for the zipper tape to be inserted and extends along the length direction of the tape; and a reinforcement portion, which is arranged at the top end of the insert rod and is solidly formed in a manner to fill the slit portion, and the reinforcement portion has a chamfered portion, which is bent in a manner that reduces the thickness of the insert rod as the outer surface of the insert rod moves toward the inner side in the tape width direction.

[0013] Furthermore, the insert pin preferably has a lower plate portion supporting the side edge of the fastener tape, and the outer surface of the lower plate portion has a guide surface that is inclined toward the top end of the insert pin in the tape length direction and toward the outer side wall portion of the insert pin in the tape width direction.

[0014] Effects of the Invention

[0015] According to the present invention, a slide fastener can be provided which can suppress the reduction in concealment of the fastener element row and make it difficult for the insert pin to be caught in the slider and the socket body during the insertion operation of the insert pin, thereby improving the operability of separating the insert pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram which shows the slide fastener which concerns on embodiment of this invention.

[0017] Figure 2 Yes means Figure 1 A top view of the plunger of the zipper is shown.

[0018] Figure 3 yes Figure 2 A bottom view of the plunger is shown.

[0019] Figure 4 Observed from the outside in the belt width direction Figure 2 A side view of the plunger is shown.

[0020] Figure 5 Observed from the rear Figure 2 Rear view of the plunger shown.

[0021] Figure 6 yes Figure 2 A cross-sectional view of the plunger on line VI-VI is shown.

[0022] Figure 7 yes Figure 2 A cross-sectional view of the plunger taken along line VII-VII is shown.

[0023] Description of Reference Numerals

[0024] 1 zipper (invisible zipper)

[0025] 10 zipper chain

[0026] 11 Zipper tape

[0027] 11a No. 1 zipper tape

[0028] 11b Second zipper tape

[0029] 12 chain teeth

[0030] 13 zipper teeth

[0031] 13a Engagement head

[0032] 14 core wire

[0033] 15 Rod installation part

[0034] 17 with main body

[0035] 18 with bending part

[0036] 19 Chain tooth installation part (with folding part)

[0037] 20 pull head

[0038] 21 Slider body

[0039] 22 Lower wing plate

[0040] 23 Guide column

[0041] 24 flange

[0042] 25 Upper wing plate

[0043] 26 Chain tooth guide path

[0044] 30 Separation Inserts

[0045] 31 socket stick

[0046] 32 socket body

[0047] 32a Storage Space

[0048] 40 plug

[0049] 41 Insert rod base end

[0050] 42. Top end of the plunger

[0051] 43 Lower plate

[0052] 43a insert rod bottom surface

[0053] 43b Guide surface

[0054] 44 outer wall

[0055] 45 upper plate part

[0056] 45a upper plate main part

[0057] 45b Width reduction section

[0058] 46 inner wall

[0059] 47 Internal Space Department

[0060] 48 gap

[0061] 49 Strengthening Department

[0062] 49a Chamfered part DETAILED DESCRIPTION

[0063] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the present invention is not limited to the embodiments described below, and various modifications can be made as long as they have substantially the same structure as the present invention and achieve the same effects.

[0064] Figure 1 It is a schematic diagram which shows the slide fastener which concerns on this embodiment. Figure 2 , Figure 3 , Figure 4 and Figure 5 The diagrams are a top view, a bottom view, a side view, and a rear view schematically showing an insert provided in a slide fastener. Figure 6 and Figure 7 The insert rod is respectively shown in the state where the zipper tape is installed. Figure 2 The cross sections along the lines VI-VI and VII-VII are shown.

[0065] In addition, Figure 1 In order to easily understand the features of the present invention, a portion of the zipper is shown in a state where a portion of the zipper is cut away, and a portion of the slider and a portion of the socket body are shown in cross section. Figure 6 and Figure 7 In order to easily understand the relationship between the zipper tape and the insert pin, the zipper tape and the insert pin are shown separately, but the insert pin in the actual product (zipper) is installed on the zipper tape in a state where at least a portion of the zipper tape contacts the inner surface of the insert pin.

[0066] In the following description, the front-back direction is a direction along the length direction of the zipper tape and a direction along the sliding direction of the slider. In particular, the direction in which the slider slides when closing the zipper is set to the front, and the direction in which the slider slides when opening the zipper is set to the rear.

[0067] The left-right direction is a direction along the tape width direction of the zipper tape, and is a direction parallel to the tape surface of the zipper tape and orthogonal to the tape length direction. In addition, regarding the tape width direction, the inner side in the tape width direction refers to a direction close to the center between the left and right zipper tapes, and the outer side in the tape width direction refers to a direction away from the center between the left and right zipper tapes.

[0068] The up-down direction is the direction along the tape surface and back direction perpendicular to the tape surface of the zipper tape. In particular, the direction exposed to the outside when the zipper is used (for example, the direction in which the pull tab of the slider is arranged relative to the zipper tape) is set as the top, and the opposite direction is set as the bottom.

[0069] like Figure 1 As shown, the slide fastener 1 of the present embodiment is formed as a hidden slide fastener 1 whose element rows 12 are hidden by the fastener tape 11 so as not to be seen or to be difficult to see from the outer surface side (upper side) of the slide fastener 1 .

[0070] The zipper (invisible zipper) 1 includes: a pair of left and right zipper tooth chain tapes 10, which are obtained by providing a chain tooth row 12 on a zipper tape 11 (the first zipper tape 11a on the left and the second zipper tape 11b on the right); a slider 20, which is slidably mounted on the chain tooth row 12; and a metal separation insert 30, which is arranged in a manner adjacent to one end (rear end) of the chain tooth row 12.

[0071] The split insert 30 includes an insert rod 40 disposed on the left zipper tape 11 (first zipper tape 11a), a socket rod 31 and a socket body 32 disposed on the right zipper tape 11 (second zipper tape 11b). The insert rod 40, the socket rod 31 and the socket body 32 are formed by a casting process of molten metal, respectively. In addition, in the present invention, the method of forming the split insert is not particularly limited.

[0072] The zipper 1 of this embodiment has a main feature in the insertion rod 40 of the separation insert 30, and the parts and portions other than the insertion rod 40 such as the zipper tape 11 and the zipper element 13 are formed substantially in the same manner as the conventionally known invisible zipper. Therefore, in this embodiment, the parts and portions other than the insertion rod 40 are briefly described. In addition, in the present invention, the shape, structure, size, etc. of the parts and portions forming the invisible zipper other than the insertion rod are not particularly limited.

[0073] Each of the left and right zipper tapes 10 includes: a zipper tape 11 woven (or knitted) into an elongated strip shape; and a plurality of zipper elements 13 sewn to the zipper tape 11. In each of the left and right zipper tapes 11, a tape side edge portion on one side in the width direction of the zipper tape 11 is bent into a substantially U-shape in the tape width direction and is continuously formed along the tape length direction.

[0074] The zipper tape 11 of the present embodiment includes: a tape main body portion 17, which is arranged on the exposed surface (upper surface) side of the invisible zipper 1 and is sewn to the zipper attachment component (the fabric of the clothing, etc.); a tape bending portion 18, which extends from the tape main body portion 17 along the tape width direction and is bent toward the lower side into a roughly U shape; and a chain element mounting portion 19, which further extends from the tape bending portion 18 along the tape width direction.

[0075] In this case, the tape bending portion 18 is disposed between the tape body portion 17 and the element mounting portion 19. In addition, the element mounting portion 19 is formed by the folded portion of the zipper tape 11 folded into a substantially U-shape, and overlaps with the lower surface side of the tape body portion 17. The element mounting portion 19 is sometimes also referred to as a tape folded portion. The element row 12 is formed by sewing a plurality of zipper elements 13 to the element mounting portion 19 of the zipper tape 11.

[0076] The plurality of zipper elements 13 are formed by spirally molding a monofilament made of a thermoplastic resin such as polyamide or polyester so as to have a continuous shape along the tape length direction. Each zipper element 13 includes: a meshing head 13a that protrudes further inward in the tape width direction than the tape bending portion 18 of the zipper tape 11; an upper leg portion and a lower leg portion that extend from the meshing head 13a in the width direction; and a connecting portion that connects the adjacent zipper elements 13 in the tape length direction.

[0077] In this case, the upper leg of the fastener element 13 is arranged in a manner to contact the element mounting portion 19 of the fastener tape 11, and the lower leg is arranged in a manner to be separated from the element mounting portion 19 of the fastener tape 11. In addition, the core thread 14 ( Figure 1 The core thread 14 is sewn to the zipper tape 11 together with the zipper element 13. In addition, the core thread 14 is directly sewn to the zipper tape 11 in the later-described insert rod mounting portion 15 of the zipper tape 11 (see Figure 6 and Figure 7 The connecting portion of the fastener element 13 connects the upper leg portion (or lower leg portion) of one fastener element 13 and the lower leg portion (or upper leg portion) of another fastener element 13 between the fastener elements 13 adjacent to each other in the tape length direction.

[0078] The left zipper tape 11 (first zipper tape 11a) has an insert rod mounting portion 15 for mounting the insert rod 40. The insert rod mounting portion 15 is disposed at the rear end of the first zipper tape 11a. The insert rod mounting portion 15 is formed by a tape portion extending rearward from the tape bending portion 18 and the element mounting portion 19 of the zipper tape 11.

[0079] like Figure 6 and Figure 7 As shown, the plunger mounting portion 15 has a shape in which one end in the tape width direction is bent downward (on the back side of the zipper 1) when observing a cross section of the plunger mounting portion 15 perpendicular to the tape length direction. The plunger mounting portion 15 of this embodiment includes a portion of the zipper tape 11 and a core thread 14 sewn to the zipper tape 11.

[0080] The right zipper tape 11 (second zipper tape 11b) has a socket rod-socket body mounting portion for mounting the socket rod 31 and the socket body 32. The socket rod-socket body mounting portion is formed by a tape portion extending backward from the tape bending portion 18 and the element mounting portion 19 of the zipper tape 11, similarly to the plug rod mounting portion 15.

[0081] The slider 20 includes: a slider body 21 that engages / disengages the left and right tooth rows 12; and a pull tab (not shown) mounted on the slider body 21. The slider body 21 includes: a lower wing plate 22; a guide post 23 that stands up from the center of the lower wing plate 22 in the width direction; left and right flanges 24 that stand up from the left and right side edges of the lower wing plate 22; left and right upper wing plates 25 that extend from the upper end of the flange 24 toward the guide post 23; and a pull tab mounting portion (not shown) for mounting the pull tab and integrally provided with the upper end of the guide post 23. In this case, the pull tab mounting portion is formed so as to protrude outward and rearward in the width direction relative to the guide post 23.

[0082] The front end of the slider main body 21 is provided with left and right shoulder openings in a manner of sandwiching the guide column 23. The rear opening is provided at the rear end of the slider main body 21. A substantially Y-shaped chain element guide path 26 for inserting a part of the zipper tape 11 and the zipper chain element 13 is provided in the slider main body 21 in a manner of communicating with the left and right shoulder openings and the rear opening. The chain element guide path 26 is formed in a manner of being surrounded by the lower wing plate 22, the left and right flange portions 24, and the left and right upper wing plates 25. Between the pull tab mounting portion in the slider main body 21 and the left and right upper wing plates 25, a belt insertion gap for inserting the zipper tape 11 is provided in a manner of communicating with the chain element guide path 26.

[0083] The socket rod 31 of the separation insert 30 is installed on the right zipper tape 11 (the second zipper tape 11b), and extends in a rod shape from the rear end of the right chain element row 12 toward the rear. The socket body 32 of the separation insert 30 is formed integrally with the socket rod 31 at the rear end of the socket rod 31. The socket body 32 restricts the sliding of the slider 20 to the rear (the separation direction of the chain element row) by abutting against the slider 20. In this case, the abutting position where the slider 20 abuts against the socket body 32 becomes the sliding limit position that restricts the sliding of the slider 20 to the rear side. A receiving space portion 32a is provided on the inner side of the socket body 32, into which a part of the insert rod 40 can be inserted and accommodated.

[0084] The plunger 40 of this embodiment is attached to the plunger attachment portion 15 of the left fastener tape 11 (first fastener tape 11a). Figure 2 to Figure 5 As shown, the insert rod 40 has an elongated shape in the length direction of the zipper tape 11. In this case, the insert rod 40 includes: an insert rod base end portion 41, which is an end portion (front end portion) on the side close to the fastener element row 12 in the length direction of the tape; and an insert rod top end portion 42, which is an end portion (rear end portion) on the side away from the fastener element row 12 in the length direction of the tape. In addition, for example, in a top view of the insert rod 40 ( Figure 2 ) or bottom view ( Figure 3 ), the plunger 40 has a shape that is bent or slightly bent toward the outside in the width direction (toward the side away from the socket rod 31 and the socket body 32) as it moves from the plunger base end 41 toward the plunger tip 42.

[0085] For example, when observing the cross section of the plunger 40 perpendicular to the belt length direction ( Figure 6 and Figure 7 ), the insert rod 40 of this embodiment includes: a lower plate portion 43, which covers the lower surface (peripheral surface) side of the insert rod mounting portion 15 of the zipper tape 11 and supports the side edge of the tape (including the core wire 14); an outer wall portion 44, which stands up from the side edge portion of the outer side in the width direction of the lower plate portion 43; an upper plate portion 45, which extends in a bent manner from the upper end portion of the outer wall portion 44; and an inner wall portion 46, which stands up from the side edge portion of the inner side in the width direction of the lower plate portion 43.

[0086] The plunger 40 is provided with an internal space 47 that accommodates a portion of the fastener tape 11 (a portion of the plunger mounting portion 15), and a slit 48 that communicates with the internal space 47 and through which the fastener tape 11 is inserted. In addition, a reinforcement 49 is provided at the plunger tip 42 of the plunger 40, and the reinforcement 49 is solidly formed in such a manner as to fill the internal space 47 and the slit 48 of the plunger 40.

[0087] The strength of the plunger 40 can be improved by the reinforcement 49. In addition, when the plunger 40 is formed by the casting process as described above, the plunger 40 can be easily formed into a predetermined shape. Furthermore, by providing the reinforcement 49, it is easy to provide an inclination on the guide surface 43b described later formed on the lower plate portion 43 of the plunger 40. The front end surface of the reinforcement 49 facing the internal space portion 47 and the slit portion 48 is formed as a flat surface orthogonal to the belt length direction.

[0088] In the plunger 40 of the present embodiment, a chamfered portion 49a is formed on the upper surface (outer surface) of the reinforcement portion 49, and the chamfered portion 49a is curved in such a manner that the thickness of the plunger 40 decreases as it moves toward the inner side in the belt width direction. For example, the chamfered portion 49a of the present embodiment is formed by a curved surface that is inclined downward as it moves toward the inner side in the belt width direction. By providing such a chamfered portion 49a on the reinforcement portion 49 of the plunger 40, the top end portion 42 of the plunger can be rounded, thereby making it easy to insert the plunger 40 from the shoulder of the slider body 21 into the element guide path 26.

[0089] For example Figure 3 As shown, the lower plate portion 43 of the plunger 40 extends slenderly in the belt length direction. In addition, the plunger 40 includes: a flat plunger bottom surface 43a, which is arranged at a substantially front half of the lower plate portion 43; and a guide surface 43b, which is arranged obliquely relative to the plunger bottom surface 43a. The plunger bottom surface 43a of the lower plate portion 43 is arranged parallel to the belt length direction and the belt width direction.

[0090] The guide surface 43b of the plunger 40 extends from the substantially middle portion in the length direction of the lower plate portion 43 toward the plunger tip portion 42, and is continuously provided from the lower plate portion 43 to the outer side wall portion 44 of the plunger 40. In addition, the guide surface 43b is provided so as to be gently inclined along the belt length direction in a manner that the thickness dimension (dimension in the vertical direction) of the plunger 40 decreases toward the plunger tip portion 42, and to be gently inclined along the belt width direction in a manner that the thickness dimension of the plunger 40 decreases toward the outer side wall portion 44.

[0091] Furthermore, the guide surface 43b of the present embodiment is formed in such a manner that the inclination angle of the guide surface 43b relative to the length direction of the belt increases as it approaches the plunger tip 42. In addition, in the present invention, the guide surface 43b of the plunger 40 may be formed by a curved surface inclined as described above, a plane inclined as described above, or a surface composed of a curved surface and a plane inclined as described above. In addition, the plunger 40 may be formed without providing the guide surface 43b.

[0092] By providing the guide surface 43b as described above on the lower plate portion 43 of the insert rod 40, for example, when the insert rod 40 is inserted from the shoulder of the slider main body 21 through the chain tooth guide path 26 into the accommodating space portion 32a of the socket body 32, even if the insert rod 40 is inserted into the slider main body 21 in a rolling posture (i.e., the insert rod 40 is tilted in the direction of opening the tape bending portion 18 of the zipper tape 11), the rolling posture of the insert rod 40 can be easily reset.

[0093] Specifically, by inserting the insert pin 40 having the guide surface 43b from the shoulder of the slider body 21, the insert pin 40 can be moved toward the receiving space 32a of the socket body 32 while the guide surface 43b of the insert pin 40 contacts the inner surface of the lower wing plate 22 in the slider body 21. Thus, the insert pin 40 can be rotated in the direction (folding direction) of closing the tape bend 18 of the fastener tape 11 by the inclination of the guide surface 43b. Therefore, during the period when the insert pin 40 inserted from the shoulder of the slider body 21 moves to the receiving space 32a of the socket body 32, the rolling posture of the insert pin 40 can be reset to an appropriate posture by the rotation caused by the inclination of the guide surface 43b. As a result, the possibility that the insert pin 40 is stuck in the slider body 21 and the socket body 32 and cannot be inserted can be reduced, and the insert pin 40 can be easily inserted into the receiving space 32a of the socket body 32 with an appropriate posture.

[0094] In the top view of the plunger 40 ( Figure 2 ), the upper plate portion 45 of the insert rod 40 includes: an upper plate main body portion 45a whose side edge portion (inner edge portion) on the side of the slit portion 48 of the upper plate portion 45 is arranged parallel or approximately parallel to the length direction of the belt; and a lateral width reduction portion 45b, which extends rearward from the upper plate main body portion 45a, and the width dimension of the upper plate portion 45 (the dimension in the belt width direction) decreases as it moves toward the top end portion 42 of the insert rod.

[0095] In the plunger 40 having such an upper plate portion 45, for example, Figure 6 As shown, at the insert rod base end portion 41, the insert rod 40 is attached to the zipper tape 11 in a manner such that the cross-sectional shape of the insert rod attachment portion 15 of the zipper tape 11 perpendicular to the tape length direction is substantially U-shaped. In this way, by attaching the insert rod 40 to the zipper tape 11 in a manner such that the cross-sectional shape of the zipper tape 11 is substantially U-shaped, the attachment strength (fixing strength) of the insert rod 40 relative to the zipper tape 11 can be improved.

[0096] In addition, in the plunger 40, for example Figure 7 As shown, at the top end 42 of the plunger, the plunger 40 is inserted so that the cross-sectional shape of the fastener tape 11 is similar to that of the plunger 40. Figure 6In this case, the zipper tape 11 is installed in a substantially L-shaped form in a different case. In this case, the zipper tape 11 has a cross-sectional deformation portion in which the cross-sectional shape of the zipper tape 11 changes continuously in the tape length direction from the substantially U-shaped shape of the plunger base end portion 41 to the substantially L-shaped shape of the plunger tip end portion 42. By providing the lateral width reduction portion 45b on the upper plate portion 45 of the plunger 40, the cross-sectional deformation portion of the zipper tape 11 is formed in at least a portion of the zipper tape 11 between the plunger base end portion 41 and the plunger tip end portion 42.

[0097] In the insert pin 40 of the present embodiment, as described above, the lateral width reduction portion 45b of the upper plate portion 45 is provided, and a cross-sectional deformation portion is formed in the insert pin mounting portion 15 of the zipper tape 11, thereby when the insert pin 40 is inserted from the shoulder of the slider body 21 toward the receiving space portion 32a of the socket body 32, the force generated in the zipper tape 11 in the direction of opening the tape bending portion 18 can be made smaller than that of the conventional insert pin described in the document 1, for example. In this way, the force generated in the zipper tape 11 can be reduced, thereby suppressing the rolling (rotation) of the insert pin 40 inserted into the slider body 21. As a result, the following situation can be less likely to occur: when the insert pin 40 inserted into the slider body 21 is accommodated in the receiving space portion 32a of the socket body 32, the insert pin 40 is stuck in the slider 20 or the socket body 32 due to the rolling of the insert pin 40. As a result, the operability of separating the insert 30 can be improved.

[0098] In the insert rod 40 of the present embodiment, when observing the cross section (cross section) of the insert rod 40 that is orthogonal to the length direction, the outer wall portion 44 arranged on the outer side in the width direction is connected to the lower plate portion 43 and the upper plate portion 45. The inner wall portion 46 arranged on the inner side in the width direction is arranged in a manner connected to the lower plate portion 43 but away from the upper plate portion 45. Thus, a slit portion 48 for inserting the zipper tape 11 is provided between the inner wall portion 46 and the upper plate portion 45 of the insert rod 40. In the cross-sectional view of the insert rod 40, the inner space portion 47 of the insert rod 40 is formed by being surrounded by the inner wall portion 46, the lower plate portion 43, the outer wall portion 44 and the upper plate portion 45. The inner space portion 47 and the slit portion 48 of the insert rod 40 are open to the front, and are continuously provided from the opening portion to the reinforcement portion 49 of the insert rod 40.

[0099] In the concealed slide fastener 1 of the present embodiment as described above, when the element rows 12 are engaged from the state where the left and right fastener stringers 10 are separated, for example, Figure 1 As shown, first, the slider 20 is moved to the contact position (sliding limit position) where it contacts the socket body 32 , and the slider 20 is held at the contact position.

[0100] Next, the plunger 40 is inserted from the shoulder of the slider body 21 toward the receiving space 32a of the socket body 32. At this time, since the lateral width reduction portion 45b of the upper plate portion 45 is provided on the plunger 40 as described above and the cross-sectional deformation portion is formed on the plunger mounting portion 15 of the zipper tape 11, the plunger 40 inserted into the slider body 21 can be prevented from rolling. Furthermore, by forming a chamfered portion 49a at the plunger tip 42 (reinforcement portion 49) of the plunger 40, the insertion operation of the plunger 40 can be easily performed.

[0101] Furthermore, when the insert rod 40 is inserted into the slider body 21, for example, even if the insert rod 40 is rotated and rolled in the direction in which the tape bend portion 18 of the fastener tape 11 is opened, the guide surface 43b (see FIG. 44 ) of the insert rod 40 that enters the fastener element guide path 26 of the slider body 21 can be opened. Figure 3 ) is in contact with the inner surface of the lower wing plate 22 of the slider main body 21 while inserting the insert rod 40 toward the socket body 32, and as described above, during the period when the insert rod 40 moves to the accommodating space portion 32a of the socket body 32, the rolling posture of the insert rod 40 is reset to an appropriate posture by utilizing the inclination of the guide surface 43b.

[0102] Therefore, in the concealed slide fastener 1 of the present embodiment, the plunger 40 can be prevented from being caught in the slider body 21 and the socket body 32 due to the rolling of the plunger 40 , so the operability of the separation insert 30 provided in the concealed slide fastener 1 can be greatly improved.

[0103] Then, the insert rod 40 is deeply inserted into the slider body 21, so that the insert rod 40 can be inserted into the chain element guide path 26 of the slider body 21, and a part of the insert rod 40 (the rear end) is inserted and accommodated in the accommodating space 32a of the socket body 32. As a result, the insert rod 40 is maintained at a predetermined position in a state facing the socket rod 31 and the socket body 32, and the insertion operation of the insert rod 40 can be smoothly completed. Then, the slider 20 is slid forward (in other words, in a direction away from the socket body 32), so that the left and right chain element rows 12 can be meshed in sequence from the rear end.

[0104] In addition, in the invisible zipper 1 of the present embodiment, the left zipper tape 11 (first zipper tape 11a) is inserted into the slit portion 48 of the insert rod 40 and extends to the outside of the insert rod 40. In addition, the right zipper tape 11 (second zipper tape 11b) is also inserted into the slit portion (not shown) of the socket rod 31 and extends to the outside of the socket rod 31. Therefore, when the left and right chain element rows 12 are engaged, a gap is not formed in the portion of the left and right chain element tapes adjacent to the separation insert 30, as in the invisible zipper of the document 2, and the concealment of the invisible zipper 1 can be more easily ensured than the invisible zipper of the document 2.

Claims

1. A zipper comprising: A pair of zipper chain tapes, each of which is obtained by providing chain tooth rows on the zipper tapes; A slider slidably mounted on the chain tooth row; A separation insert is arranged adjacent to one end of the chain element row, the zipper tape comprises: a tape body; a chain element mounting portion for mounting the zipper chain elements of the chain element row; and a tape bending portion, which is arranged between the tape body and the chain element mounting portion and bent into a substantially U-shape, the separation insert comprises: an insert rod, which is arranged on one side of a pair of the zipper tapes; and a socket rod and a socket body, which are arranged on the other side of the pair of the zipper tapes, the zipper is characterized in that: The zipper tape has an insert rod mounting portion, the insert rod mounting portion is for the insert rod to be mounted and one end portion of the insert rod mounting portion in the tape width direction has a bent shape. The insert rod mounting portion of the zipper tape has a cross-sectional deformation portion as follows: the cross-sectional shape of the insert rod mounting portion orthogonal to the length direction of the tape changes along the length direction of the tape from the insert rod base end portion of the insert rod close to the chain tooth row toward the insert rod tip end portion away from the chain tooth row, In the cross-sectional deformation portion of the plunger mounting portion, the cross-sectional shape of the fastener tape changes from a substantially U-shaped shape to a substantially L-shaped shape in a tape length direction.

2. The zipper according to claim 1, characterized in that: In a cross-sectional view of the insert rod orthogonal to the length direction of the tape, the insert rod includes: a lower plate portion that supports the tape side edge of the zipper tape; an outer side wall portion that stands up from a side edge portion in the width direction of the lower plate portion; and an upper plate portion that extends in a bent manner from an upper end portion of the outer side wall portion. The upper plate portion has a reduced width portion whose dimension extending from the outer side wall portion along the tape width direction decreases toward the plunger tip end portion in a plan view of the plunger.

3. The zipper according to claim 1 or 2, characterized in that: The insert rod includes: a slit portion, which is inserted into the zipper tape and extends along the length direction of the tape; and a reinforcing portion, which is arranged at the top end of the insert rod and is solidly formed in a manner of filling the slit portion. The reinforcing portion has a chamfered portion that is curved so as to reduce a thickness of the plunger as an outer surface of the plunger goes inward in a tape width direction.

4. The zipper according to claim 1 or 2, characterized in that: The plunger has a lower plate portion supporting the side edge of the fastener tape. The outer surface of the lower plate portion has a guide surface which is inclined in the tape length direction toward the plunger tip portion and is inclined in the tape width direction toward the outer side wall portion of the plunger.

5. The zipper according to claim 3, characterized in that: The plunger has a lower plate portion supporting the side edge of the fastener tape. The outer surface of the lower plate portion has a guide surface which is inclined in the tape length direction toward the plunger tip portion and is inclined in the tape width direction toward the outer side wall portion of the plunger.

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