CN115137131A - Slide fastener - Google Patents

Abstract

The invention provides a slide fastener which can make an insert pin difficult to be clamped in a slider and a socket body in the insert operation of the insert pin. The zipper includes: a pair of fastener stringer provided with element rows; a slider; and a separable bottom end stop disposed adjacent to one end of the fastener element row, the fastener tape including: a belt main body portion; a fastener element mounting portion to which a fastener element is mounted; and a tape bending portion which is substantially U-shaped and is disposed between the tape main body portion and the element attaching portion, the separable bottom end stop including an insert pin, and an insert body, in the slide fastener, the fastener tape has an insert pin attaching portion to which the insert pin is attached, and one end portion in a tape width direction has a bent shape, and the insert pin attaching portion has a cross-sectional deformation portion as follows: the cross-sectional shape changes in the longitudinal direction of the tape from the proximal end portion of the plunger toward the distal end portion of the plunger.

Description

Slide fastener

Technical Field

The invention relates to a hidden zipper.

Background

As one type of slide fastener, a concealed slide fastener (hereinafter, the concealed slide fastener is simply referred to as a concealed slide fastener) provided in the following manner is known: the element row is hidden by the fastener tape in such a manner as not to be visible or hardly visible from the outer surface side of the slide fastener. In the concealed slide fastener, in order to conceal the element rows, the fastener tape generally includes: a belt main body portion; a fastener element mounting portion to which fastener elements of the fastener element row are mounted; and a belt bending portion arranged between the belt main body portion and the element attaching portion and bent into a substantially U-shape.

In addition, the following are present: the fastener stringer includes a separation insert for separating left and right fastener stringers from each other when the left and right fastener element rows are separated. The breakaway inserter essentially comprises: an insert rod mounted to one side of the fastener stringer; a socket bar attached to the other side fastener stringer; and a socket body formed integrally with the socket bar and having a receiving portion for receiving the plug bar.

For example, chinese utility model No. 203986430 (document 1) discloses a slide fastener with an insert pin for the purpose of improving the lateral pull strength of the slide fastener. Further, japanese utility model registration No. 3188025 (document 2) discloses a separable bottom end stop used for concealed slide fasteners.

Disclosure of Invention

For example, in the case where the insert pin described in the above-mentioned document 1 is used for the separable bottom end stop to form the concealed slide fastener, when the insert pin is inserted into the slider (element guide path) and accommodated in the socket body of the separable bottom end stop, the above-mentioned substantially U-shaped tape bending portion of the fastener tape is easily opened.

In this case, since a force in a direction in which the tape bending portion is opened is generated in the fastener tape, the orientation (posture) of the insert pin rotates following the above-described force of the fastener tape when the cross section of the fastener tape orthogonal to the tape longitudinal direction is viewed (hereinafter, the case where the insert pin rotates as described above may be expressed as the insert pin rolls). As a result, the insert pin is caught by the slider or the socket body in the middle of inserting the insert pin into the socket body of the separable bottom end stop, and the insert pin may not be inserted to a predetermined receiving position where the insert pin is properly received in the socket body. Therefore, the workability of the detaching insert is deteriorated.

On the other hand, in the case of the concealed slide fastener having the separable bottom end stop of the above-mentioned document 2, when a cross section of the separable bottom end stop orthogonal to the tape longitudinal direction is observed, the insert pin and the receptacle pin are fixed so as to cover the fastener tape over a wide range. Specifically, in the document 2, the tape facing portions of the left and right fastener tapes facing each other are covered with the insert pin and the receptacle pin from the outside, respectively. In this case, the portions of the insert pin and the receptacle pin covering the fastener tapes are sandwiched between the left and right fastener tapes when the left and right element rows are engaged. Therefore, even if the left and right element rows are engaged, there are cases where: gaps are easily formed between the left and right fastener tapes at portions of the left and right fastener stringers adjacent to the separable bottom end stop. As a result, the concealing property of the hidden element rows of the concealed slide fastener may be locally lowered.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a slide fastener in which a drop in concealment of a fastener element row can be suppressed, and an insert pin can be made difficult to be caught by a slider and a socket body in an insert operation of the insert pin.

In order to achieve the above object, the present invention provides a slide fastener, comprising: a pair of fastener stringers in which fastener element rows are provided on fastener tapes, respectively; a slider slidably attached to the element row; a separable fastener insert disposed adjacent to one end of the fastener element row, the fastener tape including: a belt main body portion; a fastener element mounting portion to which a fastener element of the fastener element row is mounted; and a tape bending portion that is disposed between the tape main body portion and the element attaching portion and is bent substantially in a U-shape, the separable bottom end stop including: an insert pin provided to one of the pair of fastener tapes; and a socket bar and a socket body which are provided to the other side zipper tape of the pair of zipper tapes, the zipper being characterized in that: the fastener tape has an insert pin attaching portion to which the insert pin is attached and in which one end portion in a tape width direction has a bent shape, the insert pin attaching portion of the fastener tape has a cross-sectional deformation portion as follows: the cross-sectional shape of the plunger attachment portion orthogonal to the belt longitudinal direction changes in the belt longitudinal direction from a plunger base end portion of the plunger that is closer to the element row to a plunger tip end portion that is farther from the element row.

In the slide fastener according to the present invention, it is preferable that the cross-sectional shape of the fastener tape is changed from a substantially U-shape to a substantially L-shape in a tape longitudinal direction in the cross-sectional deformed portion of the insert pin attaching portion.

In addition, in a cross-sectional view of the plunger orthogonal to the tape longitudinal direction, the plunger preferably includes: a lower plate portion that supports a tape side edge of the fastener tape; an outer wall portion rising from one side edge portion in a width direction of the lower plate portion; and an upper plate portion extending from an upper end portion of the outer wall portion in a bent manner, wherein the upper plate portion has a reduced lateral width portion whose dimension extending from the outer wall portion in a belt width direction in a plan view of the plunger decreases toward a distal end portion of the plunger.

In the slide fastener of the present invention, it is preferable that the insert pin includes: a slit portion through which the fastener tape is inserted and which extends in the tape longitudinal direction; and a reinforcing portion that is disposed at a distal end portion of the plunger and is formed in a solid manner so as to fill the gap portion, the reinforcing portion having a chamfered portion that is curved so as to reduce a thickness of the plunger as an outer surface of the plunger moves inward in a width direction of the tape.

Further, it is preferable that the insert pin has a lower plate portion that supports a tape side edge of the fastener tape, and an outer surface of the lower plate portion has a guide surface that is inclined in the tape length direction toward a tip end portion of the insert pin and is inclined in the tape width direction toward an outer side wall portion of the insert pin.

Effects of the invention

According to the present invention, it is possible to provide a slide fastener in which the lowering of the concealing property of the element rows is suppressed, and the operability of the separable bottom end stop is improved by making it difficult for the insert pin to be caught by the slider and the receptacle body in the insert operation of the insert pin.

Drawings

Fig. 1 is a schematic view showing a slide fastener according to an embodiment of the present invention.

Fig. 2 is a plan view showing a plunger of the slide fastener shown in fig. 1.

Fig. 3 is a bottom view of the plunger shown in fig. 2.

Fig. 4 is a side view of the plunger shown in fig. 2 as viewed from the outside in the belt width direction.

Fig. 5 is a rear view of the plunger shown in fig. 2 as viewed from the rear side.

Fig. 6 is a cross-sectional view of the plunger shown in fig. 2 taken along line VI-VI.

FIG. 7 is a cross-sectional view of the plunger taken along line VII-VII of FIG. 2.

Description of the reference numerals

1 zipper (invisible zipper)

10 zipper teeth chain belt

11 zipper tape

11a No. 1 fastener tape

11b 2 nd zipper tape

12 element row

13 zipper teeth

13a engaging head

14 core wire

15 plunger mounting section

17 belt body part

18 belt bend

19 chain element mounting part (with folding part)

20 slider

21 slider trunk

22 lower wing plate

23 guide post

24 flange part

25 upper wing plate

26 element guide path

30 separable insert

31 socket rod

32 socket body

32a accommodating space part

40 plunger

41 proximal part of plunger

42 plunger tip

43 lower plate part

43a plunger bottom surface

43b guide surface

44 outer side wall part

45 upper plate part

45a upper plate body part

45b lateral width reducing part

46 inner side wall part

47 inner space part

48 gap part

49 reinforcing part

49a chamfer part

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments described below, and various modifications may be made as long as the present invention has substantially the same configuration and the same operational effects as those of the present invention.

Fig. 1 is a schematic view showing a slide fastener according to the present embodiment. Fig. 2, 3, 4 and 5 are a plan view, a bottom view, a side view and a rear view schematically showing an insert pin provided in the slide fastener, respectively. Fig. 6 and 7 show cross sections on the line VI-VI and the line VII-VII shown in fig. 2, respectively, in a state where the insert pin is attached to the fastener tape.

Further, in fig. 1, in order to easily understand the features of the present invention, a state in which a part of the slide fastener is cut off is shown, and a part of the slider and a part of the socket body are shown in cross section. In fig. 6 and 7, the fastener tape and the insert pin are separately shown in order to easily understand the relationship between the fastener tape and the insert pin, but the insert pin in an actual product (fastener) is attached to the fastener tape in a state where at least a part of the fastener tape is in contact with an inner surface of the insert pin.

In the following description, the front-rear direction is a direction along the tape longitudinal direction of the fastener tape and a direction along the sliding direction in which the slider slides. In particular, the direction in which the slider slides when the slide fastener is closed is defined as the front, and the direction in which the slider slides when the slide fastener is opened is defined as the rear.

The left-right direction is a direction along the tape width direction of the fastener tape, and means a direction parallel to the tape surface of the fastener tape and orthogonal to the tape longitudinal direction. In the tape width direction, the inner side in the tape width direction refers to a direction toward the center between the left and right fastener tapes, and the outer side in the tape width direction refers to a direction away from the center between the left and right fastener tapes.

The vertical direction is a direction along a tape front-back direction orthogonal to the tape surface of the fastener tape. In particular, a direction in which the slide fastener is exposed to the outside when used (for example, a direction in which the tab of the slider is arranged with respect to the fastener tape) is set to be upward, and a direction opposite thereto is set to be downward.

As shown in fig. 1, the slide fastener 1 of the present embodiment is formed as a concealed slide fastener 1, and the element rows 12 of the concealed slide fastener 1 are concealed by the fastener tape 11 so as to be invisible or hardly visible from the outer surface side (upper side) of the slide fastener 1.

The slide fastener (concealed slide fastener) 1 includes: a pair of right and left fastener stringers 10 in which fastener tape 11 (left 1 st fastener tape 11a and right 2 nd fastener tape 11 b) is provided with element rows 12; a slider 20 slidably attached to the element row 12; and a metal separable bottom end stop 30 disposed adjacent to one end (rear end) of the element row 12.

The release insert 30 comprises: an insert pin 40 provided to the left fastener tape 11 (1 st fastener tape 11 a); and a receptacle bar 31 and a receptacle body 32 provided to the right fastener tape 11 (2 nd fastener tape 11 b). The plug bar 40, the socket bar 31, and the socket body 32 are formed by a molten metal casting process. In the present invention, the method of forming the separable bottom end stop is not particularly limited.

The slide fastener 1 of the present embodiment has a main feature in separating the insert pin 40 of the insert 30, and is formed substantially in the same manner as a conventionally known concealed slide fastener with respect to members and portions other than the insert pin 40, such as the fastener tape 11 and the fastener elements 13. Therefore, in the present embodiment, the components and portions other than the plunger 40 will be briefly described. In the present invention, the shape, structure, size, and the like of the members and portions forming the concealed slide fastener other than the plunger are not particularly limited.

The left and right fastener stringers 10 include: a fastener tape 11 woven (or knitted) into an elongated belt shape; and a plurality of fastener elements 13 sewn to the fastener tape 11. In each of the right and left fastener tapes 11, a shape obtained by bending a tape side edge portion of one side in the width direction of the fastener tape 11 into a substantially U shape in the tape width direction is continuously formed along the tape longitudinal direction.

The fastener 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 concealed slide fastener 1 and is sewn to a fastener attaching member (a fabric of clothes or the like); a belt bent portion 18 extending from the belt main body portion 17 in the belt width direction and bent downward into a substantially U-shape; and an element attaching portion 19 that extends further in the belt width direction from the belt bent portion 18.

In this case, the belt bent portion 18 is disposed between the belt main body portion 17 and the element attaching portion 19. The element attaching portion 19 is formed by a folded-back portion of the fastener tape 11 bent into a substantially U shape, and overlaps the lower surface side of the tape main body portion 17. The element attaching portion 19 is also referred to as a tape folded portion. The element row 12 is formed by sewing a plurality of fastener elements 13 to the element attaching portion 19 of the fastener tape 11.

The plurality of fastener elements 13 are formed by spirally molding a monofilament made of a thermoplastic resin such as polyamide or polyester, and have a shape continuous in the belt longitudinal direction. Each fastener element 13 includes: an engagement head 13a that protrudes further inward in the tape width direction than the tape folded portion 18 of the fastener tape 11; upper and lower leg portions extending in the width direction from the engagement head portion 13 a; and a coupling portion that couples the fastener elements 13 adjacent in the tape longitudinal direction.

In this case, the upper leg portion of the fastener element 13 is disposed so as to contact the element mounting portion 19 of the fastener tape 11, and the lower leg portion is disposed so as to be spaced apart from the element mounting portion 19 of the fastener tape 11. A core thread 14 (not shown in fig. 1) is inserted between the upper leg portion and the lower leg portion of the fastener element 13, and the core thread 14 is sewn to the fastener tape 11 together with the fastener element 13. The core thread 14 is directly sewn to the fastener tape 11 at an insert pin attaching portion 15 (see fig. 6 and 7) of the fastener tape 11, which will be described later. The coupling portion of the fastener element 13 couples the upper leg portion (or the lower leg portion) of one fastener element 13 and the lower leg portion (or the upper leg portion) of the other fastener element 13 between the fastener elements 13 adjacent in the tape longitudinal direction.

The left fastener tape 11 (1 st fastener tape 11 a) has an insert pin attaching portion 15 to which the insert pin 40 is attached. The insert pin attaching portion 15 is disposed at the rear end portion of the 1 st fastener tape 11 a. The insert pin attaching portion 15 is formed of a tape portion extending rearward from the above-described tape bending portion 18 and the element attaching portion 19 of the fastener tape 11.

As shown in fig. 6 and 7, the plunger attachment portion 15 has a shape in which one end portion in the tape width direction is bent downward (the back surface side of the slide fastener 1) when the cross section of the plunger attachment portion 15 orthogonal to the tape longitudinal direction is viewed. The insert pin attaching part 15 of the present embodiment includes a part of the fastener tape 11 and a core thread 14 sewn to the fastener tape 11.

The right fastener tape 11 (2 nd fastener tape 11 b) has a receptacle bar-receptacle body attachment portion to which the receptacle bar 31 and the receptacle body 32 are attached. The receptacle bar-receptacle body attachment portion is formed of a tape portion extending rearward from the above-described tape bending portion 18 and the element attachment portion 19 of the fastener tape 11, similarly to the plug attachment portion 15.

The slider 20 includes: a slider body 21 for engaging and disengaging the left and right element rows 12; and a pull tab, not shown, attached to the slider body 21. The slider body 21 includes: a lower wing plate 22; a guide pillar 23 rising from a widthwise central portion of the lower blade 22; left and right flange portions 24 rising from left and right side edge portions of the lower panel 22; left and right upper flanges 25 extending from upper end portions of the flange portions 24 toward the guide posts 23; and a tab attaching portion (not shown) for attaching a tab and provided integrally with the upper end portion of the guide post 23. In this case, the tab attaching portion is formed so as to protrude outward and rearward in the width direction than the guide post 23.

Left and right shoulder openings are provided at the front end of the slider body 21 with guide posts 23 interposed therebetween. A rear opening is provided at the rear end of the slider body 21. A substantially Y-shaped element guide path 26 through which a part of the fastener tape 11 and the fastener element 13 are inserted is provided in the slider body 21 so as to communicate with the left and right shoulder openings and the rear opening. The element guide path 26 is formed so as to be surrounded by the lower wing 22, the left and right flange portions 24, and the left and right upper wing 25. A tape insertion gap through which the fastener tape 11 is inserted is provided between the tab attaching portion of the slider body 21 and the left and right upper blades 25 so as to communicate with the element guide path 26.

The receptacle bar 31 of the separable bottom end stop 30 is attached to the right fastener tape 11 (the 2 nd fastener tape 11 b), and extends in a bar shape from the rear end of the right fastener element row 12 toward the rear. The socket body 32 of the separable bottom end insert 30 is formed integrally with the socket bar 31 at the rear end of the socket bar 31. The socket body 32 abuts against the slider 20 to regulate the slider 20 from sliding backward (in the direction of separating the element rows). In this case, the contact position where the slider 20 contacts the socket body 32 is a slide limit position that restricts the slider 20 from sliding rearward. A receiving space portion 32a into which a part of the plunger 40 can be inserted and received is provided inside the socket body 32.

The insert pin 40 of the present embodiment is attached to the insert pin attaching portion 15 of the left fastener tape 11 (1 st fastener tape 11 a). As shown in fig. 2 to 5, the insert pin 40 has a shape elongated in the tape longitudinal direction of the fastener tape 11. In this case, the plunger 40 includes: a plunger base end portion 41 which is an end portion (tip end portion) on the side close to the element row 12 in the belt longitudinal direction; and a plunger tip end portion 42 which is an end portion (rear end portion) on a side away from the element row 12 in the belt longitudinal direction. For example, in a plan view (fig. 2) or a bottom view (fig. 3) of the plunger 40, the plunger 40 has a shape that is curved outward in the width direction (a side away from the socket bar 31 and the socket body 32) or a shape that is slightly curved from the plunger base end portion 41 toward the plunger tip end portion 42.

For example, when a cross section of the plunger 40 perpendicular to the tape longitudinal direction is viewed (fig. 6 and 7), the plunger 40 of the present embodiment includes: a lower plate portion 43 that covers the lower surface (outer peripheral surface) side of the insert pin attaching portion 15 of the fastener tape 11 and supports the tape side edge (including the core thread 14); an outer side wall portion 44 rising from a side edge portion on the outer side in the width direction of the lower plate portion 43; an upper plate portion 45 extending from an upper end portion of the outer wall portion 44 in a bent manner; and an inner wall portion 46 rising from a side edge portion on the inner side in the width direction of the lower plate portion 43.

Inside the plunger 40, there are provided: an internal space portion 47 that accommodates a part of the fastener tape 11 (a part of the insert pin attaching portion 15); and a slit portion 48 communicating with the internal space portion 47 and through which the fastener tape 11 is inserted. Further, a reinforcing portion 49 is provided at the plunger tip end portion 42 of the plunger 40, and the reinforcing portion 49 is formed so as to fill the internal space portion 47 and the slit portion 48 of the plunger 40.

The strength of the plunger 40 can be improved by the reinforcement portion 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. Further, by providing the reinforcement portion 49, the guide surface 43b, which will be described later, formed on the lower plate portion 43 of the plunger 40 can be easily inclined. The distal end surface of the reinforcing portion 49 facing the internal space portion 47 and the slit portion 48 is formed as a flat surface perpendicular to the belt longitudinal direction.

In the plunger 40 of the present embodiment, a chamfered portion 49a is formed on the upper surface (outer surface) of the reinforcing portion 49, and the chamfered portion 49a is curved so as to reduce the thickness of the plunger 40 toward the inside in the belt width direction. For example, the chamfered portion 49a of the present embodiment is formed by a curved surface that slopes downward toward the inside in the belt width direction. By providing such a chamfered portion 49a in the reinforcing portion 49 of the insert pin 40, the insert pin tip end portion 42 can be rounded, and thus the insert pin 40 can be easily inserted into the element guide path 26 from the shoulder opening of the slider body 21.

For example, as shown in fig. 3, the lower plate portion 43 of the plunger 40 extends in a long and narrow manner in the belt longitudinal direction. In addition, the plunger 40 includes: a flat plunger bottom surface 43a disposed substantially in the front half of the lower plate portion 43; and a guide surface 43b disposed obliquely to the plunger bottom surface 43 a. The plunger bottom surface 43a of the lower plate portion 43 is arranged parallel to the belt longitudinal direction and the belt width direction.

The guide surface 43b of the plunger 40 extends from a substantially middle portion of the lower plate portion 43 in the longitudinal direction toward the plunger tip end portion 42, and is provided continuously 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: the plunger 40 is gently inclined in the tape longitudinal direction so that the thickness dimension (the dimension in the vertical direction) thereof decreases toward the plunger tip end portion 42, and the plunger 40 is gently inclined in the tape width direction so that the thickness dimension thereof decreases toward the outer side wall portion 44.

Further, the guide surface 43b of the present embodiment is formed as follows: the inclination angle of the guide surface 43b with respect to the tape longitudinal direction increases as the plunger tip end portion 42 is approached. In the present invention, the guide surface 43b of the plunger 40 may be formed by a curved surface inclined as described above, a flat surface inclined as described above, or a surface formed by a combination of a curved surface and a flat surface inclined as described above. The plunger 40 may be formed without providing the guide surface 43 b.

By providing the guide surface 43b as described above in the lower plate portion 43 of the insert pin 40, for example, when the insert pin 40 is inserted into the housing space portion 32a of the socket body 32 from the shoulder opening of the slider body 21 via the element guide path 26, even when the insert pin 40 is inserted into the slider body 21 in the rolling posture (that is, the posture in which the insert pin 40 is inclined in the direction of opening the tape folded portion 18 of the fastener tape 11), the rolling posture of the insert pin 40 can be easily returned.

Specifically, by inserting the insert pin 40 having the guide surface 43b from the shoulder opening of the slider body 21, the insert pin 40 can be moved toward the accommodation space portion 32a of the socket body 32 while the guide surface 43b of the insert pin 40 is brought into contact with the inner surface of the lower wing plate 22 in the slider body 21. Accordingly, since the insert pin 40 can be urged to rotate in the direction (folding direction) in which the tape folded portion 18 of the fastener tape 11 is closed by the inclination of the guide surface 43b, the rolling posture of the insert pin 40 can be returned to an appropriate posture by the rotation caused by the inclination of the guide surface 43b while the insert pin 40 inserted from the shoulder opening of the slider body 21 moves to the accommodation space portion 32a of the receptacle body 32. As a result, the possibility that the insert pin 40 is caught 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 portion 32a of the socket body 32 in an appropriate posture.

In a plan view (fig. 2) of the plunger 40, the upper plate portion 45 of the plunger 40 includes: an upper plate body 45a in which a side edge portion (inner edge portion) of the upper plate 45 on the slit portion 48 side is arranged parallel or substantially parallel to the belt longitudinal direction; and a lateral width reducing portion 45b that extends rearward from the upper plate body portion 45a, and that reduces the width dimension (the dimension in the belt width direction) of the upper plate portion 45 toward the plunger tip end portion 42.

In the insert pin 40 having such an upper plate portion 45, as shown in fig. 6, for example, the insert pin 40 is attached to the fastener tape 11 in a form in which a cross-sectional shape orthogonal to the tape longitudinal direction of the insert pin attaching portion 15 of the fastener tape 11 is substantially U-shaped at the insert pin base end portion 41. In this way, by attaching the insert pin 40 to the fastener tape 11 so that the cross-sectional shape of the fastener tape 11 is substantially U-shaped, the attachment strength (fixing strength) of the insert pin 40 to the fastener tape 11 can be improved.

In addition, in the insert pin 40, as shown in fig. 7, for example, the insert pin 40 is attached to the fastener tape 11 at an insert pin tip end portion 42 in such a manner that the above-described cross-sectional shape of the fastener tape 11 is a substantially L-shaped shape different from the case of fig. 6. In this case, the fastener tape 11 has a cross-sectional deformed portion in which the cross-sectional shape of the fastener tape 11 continuously changes in the tape longitudinal direction from the substantially U-shaped shape of the insert pin base end portion 41 to the substantially L-shaped shape of the insert pin tip end portion 42. By providing the width reducing portion 45b in the upper plate portion 45 of the insert pin 40, the cross-sectional deformed portion of the fastener tape 11 is formed at least in a part of the fastener tape 11 from the insert pin base end portion 41 to the insert pin tip end portion 42.

In the insert pin 40 of the present embodiment, the reduced width portion 45b of the upper plate portion 45 is provided as described above, and the cross-sectional deformation portion is formed in the insert pin attachment portion 15 of the fastener tape 11, so that when the insert pin 40 is inserted from the shoulder opening of the slider main body 21 toward the accommodation space portion 32a of the receptacle body 32, the force in the direction in which the tape bending portion 18 opens, which is generated in the fastener tape 11, can be made smaller than that of the conventional insert pin described in, for example, the above-mentioned document 1. Thus, the force generated in the fastener tape 11 can be reduced, and thereby the occurrence of rolling (rotation) of the insert pin 40 inserted into the slider body 21 can be suppressed. This makes it possible to prevent the following: in the middle of the insertion pin 40 inserted into the slider body 21 being accommodated in the accommodation space 32a of the socket body 32, the insertion pin 40 is caught by the slider 20 or the socket body 32 due to the rolling of the insertion pin 40. As a result, the workability of detaching the insert 30 can be improved.

In the plunger 40 of the present embodiment, when a cross section (cross section) of the plunger 40 perpendicular to the longitudinal direction is viewed, the outer wall portion 44 disposed 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 disposed on the inner side in the width direction is connected to the lower plate portion 43 but is disposed apart from the upper plate portion 45. Thus, a slit portion 48 through which the fastener tape 11 is inserted is provided between the inner wall portion 46 and the upper plate portion 45 of the insert pin 40. In the cross-sectional view of the plunger 40, an inner space 47 of the plunger 40 is formed to be surrounded by the inner wall 46, the lower plate 43, the outer wall 44, and the upper plate 45. The inner space 47 and the slit 48 of the plunger 40 are open forward and are provided continuously from the opening to the reinforcement 49 of the plunger 40.

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, as shown in fig. 1, first, the slider 20 is moved to an abutment position (slide limit position) where it abuts against the receptacle body 32, and the slider 20 is held at the abutment position.

Next, the insert pin 40 is inserted from the shoulder opening of the slider body 21 toward the accommodation space 32a of the socket body 32. At this time, since the reduced width portion 45b of the upper plate portion 45 is provided in the insert pin 40 and the cross-sectional deformation portion is formed in the insert pin mounting portion 15 of the fastener tape 11 as described above, the insert pin 40 inserted into the slider body 21 can be suppressed from rolling. Further, by forming the chamfered portion 49a in the plunger tip end portion 42 (reinforcing portion 49) of the plunger 40, the insertion operation of the plunger 40 can be easily performed.

Further, when the insert pin 40 is inserted into the slider body 21, for example, even when the insert pin 40 rotates and rolls in a direction in which the tape bending portion 18 of the fastener tape 11 is opened, the insert pin 40 can be inserted toward the socket body 32 while the guide surface 43b (see fig. 3) of the insert pin 40 entering the element guide path 26 of the slider body 21 is brought into contact with the inner surface of the lower wing plate 22 of the slider body 21, and the rolled posture of the insert pin 40 can be returned to an appropriate posture by the inclination of the guide surface 43b during the movement of the insert pin 40 to the housing space portion 32a of the socket body 32 as described above.

Therefore, in the concealed slide fastener 1 of the present embodiment, the locking of the insert pin 40 to the slider body 21 and the receptacle body 32 due to the rolling of the insert pin 40 can be suppressed, and therefore, the operability of the separable bottom end stop 30 provided in the concealed slide fastener 1 can be greatly improved.

Then, by inserting the insert pin 40 deeply into the slider body 21, the insert pin 40 can be inserted into the element guide path 26 of the slider body 21, and a part (rear end portion) of the insert pin 40 can be inserted and stored in the storage space portion 32a of the socket body 32. This allows the plunger 40 to be held at a predetermined position in a state of facing the socket rod 31 and the socket body 32, and the insertion operation of the plunger 40 can be smoothly completed. Then, the slider 20 is slid forward (in other words, in a direction away from the socket body 32), whereby the left and right element rows 12 can be sequentially engaged from the rear end portion.

In the concealed slide fastener 1 according to the present embodiment, the left fastener tape 11 (the 1 st fastener tape 11 a) is inserted into the slit portion 48 of the insert pin 40 and extends outward of the insert pin 40. The right fastener tape 11 (2 nd fastener tape 11 b) is also inserted into a slit portion (not shown) of the receptacle bar 31 and extends outward of the receptacle bar 31. Therefore, when the left and right element rows 12 are engaged with each other, for example, as in the concealed slide fastener of document 2, a gap is not formed in a portion of the left and right fastener stringers adjacent to the separable bottom end stop 30, and the concealing property of the concealed slide fastener 1 can be more easily ensured than in the concealed slide fastener of document 2.

Claims (7)

1. A zipper, comprising: a pair of fastener stringers in which fastener element rows are provided on fastener tapes, respectively; a slider slidably attached to the element row; a separable bottom end stop disposed adjacent to one end of the fastener element row, the fastener tape including: a belt main body portion; a fastener element mounting portion to which a fastener element of the fastener element row is mounted; and a tape bending portion that is disposed between the tape main body portion and the element attaching portion and is bent substantially in a U-shape, the separable bottom end stop including: an insert pin provided to one of the pair of fastener tapes; and a socket bar and a socket body which are provided to the other side zipper tape of the pair of zipper tapes, the zipper being characterized in that:

the fastener tape has an insert pin attaching portion to which the insert pin is attached and in which one end portion in a tape width direction has a bent shape,

the insert pin mounting portion of the fastener tape has a cross-sectional deformation portion as follows: the cross-sectional shape of the plunger attachment portion orthogonal to the belt longitudinal direction changes in the belt longitudinal direction from a plunger base end portion of the plunger that is closer to the element row to a plunger tip end portion that is farther from the element row.

2. The zipper of claim 1, wherein:

in the cross-sectional deformed portion of the insert pin attaching portion, the cross-sectional shape of the fastener tape is changed from a substantially U-shape to a substantially L-shape in a tape length direction.

3. The zipper of claim 1, wherein:

in a cross-sectional view of the plunger orthogonal to a ribbon length direction, the plunger comprises: a lower plate portion that supports a tape side edge of the fastener tape; an outer side wall portion that rises from one side edge portion in the width direction of the lower plate portion; and an upper plate portion extending from an upper end portion of the outer side wall portion so as to be bent,

the upper plate portion has a lateral width reducing portion that reduces in size extending from the outer side wall portion in the tape width direction toward the distal end portion of the plunger in a plan view of the plunger.

4. The zipper of claim 2, wherein:

in a cross-sectional view of the plunger orthogonal to the tape length direction, the plunger comprises: a lower plate portion that supports a tape side edge of the fastener tape; an outer wall portion rising from one side edge portion in a width direction of the lower plate portion; and an upper plate portion extending from an upper end portion of the outer side wall portion so as to be bent,

the upper plate portion has a lateral width reducing portion that reduces in size extending from the outer side wall portion in the belt width direction toward the plunger tip end portion in a plan view of the plunger.

5. The slide fastener according to any one of claims 1 to 4, wherein:

the plunger includes: a slit portion through which the fastener tape is inserted and which extends in the tape longitudinal direction; and a reinforcing portion disposed at a distal end portion of the plunger and formed to fill the gap portion,

the reinforcing portion has a chamfered portion that is curved so as to reduce the thickness of the plunger as the outer surface of the plunger moves inward in the width direction of the belt.

6. The slide fastener according to any one of claims 1 to 4, wherein:

the insert pin has a lower plate portion supporting a tape side edge of the fastener tape,

the outer surface of the lower plate portion has a guide surface that is inclined in the belt length direction toward the tip end portion of the plunger, and is inclined in the belt width direction toward the outer side wall portion of the plunger.

7. The slide fastener according to claim 5, wherein:

the insert pin has a lower plate portion supporting a tape side edge of the fastener tape,

the outer surface of the lower plate portion has a guide surface that is inclined in the belt length direction toward the tip end portion of the plunger, and is inclined in the belt width direction toward the outer side wall portion of the plunger.

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