Zipper and opening device for a zipper

Abstract

In a slide fastener (10), in a slider pull-up start position in which an insertion pin (70) is inserted into a pin insertion hole (63) of a box body (62) and a slider (40) is in contact with the front surface of the box body (62), an engaging head portion (32) of the rearmost link (31a) of a coupling element row (30A) approaches or comes into contact with an engaging portion (74) provided on the insertion pin (70). This improves operability when pulling up the slider.

Description

TECHNICAL FIELD

[0001] The present invention relates to a zipper with an opening device and to an opening device for a zipper. STATE OF THE ART

[0002] For example, in a zipper used for a front-opening garment, such as a sweater, a coat, or the like, an opening device is provided at an end portion of left and right zipper lengths. The opening device generally includes a box body and a box pin attached to an end portion of one of the zipper lengths, and a separable pin attached to an end portion of the other zipper length.

[0003] As a prior art slide fastener with an opening device, there is a slide fastener in which an upper surface of a box body is provided with an inclined surface portion formed to slope downward from a side wall of a box pin insertion hole to a side wall of a separating pin insertion hole, and a slider is formed such that when the box body and the slider abut each other, the slider can be tilted toward a separating pin insertion hole of the box body, and the separable pin can be smoothly and easily inserted into the separating pin insertion hole from obliquely above via the slider (see, for example, Patent Document 1). LIST OF DOCUMENTSPATENTS

[0004] Patent Document 1: JP3621006B SUMMARY OF THE INVENTIONTECHNICAL PROBLEM

[0005] However, depending on the design of the zipper, such as a water-barrier zipper in which a water-barrier film is attached to a knitted fastener, force is required to pull up the slider when closing the zipper, and the slider is slightly twisted to the side of a box pin when pulled up.

[0006] In particular, as in Fig. 13A, when a slider 40 is brought into contact with a front surface of a box body 62 and the slider 40 is pulled upward from a state in which a separable pin 70 is inserted and accommodated in a separating pin insertion hole of the box body 62 via a link guide path 48 of the slider 40, the slider 40 is rotated toward a box pin 61 as shown in Fig. 13B.

[0007] Specifically, the knitted fastener is manufactured by simultaneously knitting fastener tapes and knitting coil-shaped fastener elements to tape side edge portions of the fastener tapes, and the fastener element longitudinal members are easily formed to be flexible. Therefore, when the slider 40 is rotated, an element row 30A on one side including the box pin 61 and the box body 62 is pushed through a guide post 45, and there is a possibility that an engaging head portion 32 of a rearmost link 31a closest to a box pin 61 moves forward (away from the box pin 61), collides with an engaging head portion of a rearmost link 31b closest to the separable pin 70 in an element row 30B with the separable pin 70, and the engagement is not performed properly.

[0008] Therefore, if the rearmost links 31a and 31b closest to the box pin 61 and the separable pin 70 collide with each other and are not properly engaged with each other, the slider 40 may not be pulled up smoothly.

[0009] The present invention has been made in view of the circumstances described above, and an object of the invention is to provide a slide fastener and a slide fastener opening device capable of improving operability when pulling up a slider. SOLUTION TO THE PROBLEM

[0010] The object of the present invention is achieved by the following designs. (1) A zipper comprising: a pair of zipper longitudinal parts with a pair of carrying tapes and a pair of coupling element rows, each provided on mutually facing tape side edge portions of the two carrying tapes; an opening device comprising a box pin and a box body arranged on a rear end side of one of the two rows of coupling elements, and a separable pin arranged on a rear end side of the other of the two rows of coupling elements; and a slider comprising an upper shield and a lower shield arranged in parallel so as to be spaced apart from each other in an up-down direction, a guide column connecting the upper shield to the lower shield at front end portions thereof, and a flange portion provided at a rear side edge portion of the upper shield and / or the lower shield and adapted to engage and separate the two rows of coupling elements, wherein the box body is provided with the box pin which protrudes forward from the box body on one side in a width direction in which the two rows of coupling elements are arranged, and on the other side in the width direction a separating pin insertion hole is formed into which the separable pin can be inserted, the separable pin has an engaging portion adapted to be engaged with an engaging head portion of a rearmost link of one of the coupling element rows, and when the separable pin is inserted into the separable pin insertion hole of the box body and the slider is in contact with a front surface of the box body in a pull-up start position of the slider, the engaging head portion of the rearmost link of the one element row is close to or in contact with the engaging portion provided on the separable pin. (2) The zipper according to (1), in which the front surface of the box body has a surface inclined backward from one side of the box pin to one side of the separator pin insertion hole, and the slider is inclined with respect to the width direction in which the two rows of coupling elements are arranged in the pull-up start position of the slider. (3) The zipper according to (2), in which the inclined surface is inclined in a range of 5 degrees to 12 degrees with respect to the width direction in which the two rows of coupling elements are arranged. (4) The zipper according to (2) or (3), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming the front surface of the box body, a width of the extension portion is smaller than a width of the box body main body portion, and an end portion on the side of a separating pin insertion hole of the inclined surface is connected to a front surface of the box body main body portion. (5) The zipper according to any one of (1) to (3), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming the front surface of the box body, and a width of the extension portion is smaller than a width of the box body main body portion. (6) The zipper according to any one of (1) to (5), in which the slider comprises parallel sections extending from a rear opening and parallel to each other on an inner surface of the flange section, the box pin has an upright surface along a front-to-back direction of the zipper on a side surface opposite a side facing the separable pin, and the entire upright surface of the box pin faces the parallel sections of the flange section in the pull-up start position of the slider. (7) An opening device for a zipper, comprising: a box pin and a box body adapted to be arranged on a rear end side of a coupling element row of a pair of coupling element rows; and a separable pin adapted to be arranged on the side of a rear end of the other of the two rows of coupling elements, wherein the box body is provided with the box pin which protrudes forward from the box body on one side in a width direction of the box body, and on the other side in the width direction of the box body, a separating pin insertion hole is formed into which the separable pin can be inserted, and a length of a portion of the box pin protruding from the box body is 35% to 45% of a length from a bottom surface of the partition pin insertion hole of the box body to an outermost end of the box pin in a longitudinal direction of the box pin. (8) The opening device for the zipper according to (7), in which a front surface of the box body has an inclined surface which is inclined rearwardly from a side of the box pin to a side of the separator pin insertion hole. (9) The opening device for the zipper according to (8), in which the inclined surface is inclined in a range of 5 degrees to 12 degrees with respect to the width direction of the box body. (10) The slide fastener opening device according to (8) or (9), wherein the box body comprises a box body main body portion provided with the separating pin insertion hole and an extension portion continuous from the box body main body portion and forming the front surface of the box body, a width of the extension portion is smaller than a width of the box body main body portion, and an end portion on the side of a separating pin insertion hole of the inclined surface is connected to a front surface of the box body main body portion. (11) The opening device for the zipper according to any one of (7) to (9), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming a front surface of the box body, and a width of the extension portion is smaller than a width of the box body main body portion. ADVANTAGEOUS EFFECTS OF THE INVENTION

[0011] According to the present invention, the rearmost links of the two coupling element rows can be prevented from colliding with each other and not being properly engaged with each other even if the slider is twisted when pulling up, and the operability when pulling up the slider can be improved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a slide fastener according to an embodiment of the present invention. Fig. 2 is a side view of a slider. Fig. 3 is a plan view of a separable pin. Fig. 4 is a perspective view showing a box body and a box pin of an opening device. Fig. 5 is a plan view showing the box body and the box pin. Fig. 6 is a cross-sectional view showing the box body and the box pin in a middle portion of the box body in an up-down direction. Fig. 7A is a view showing a positional relationship between the slider, the opening device, and links in a state where the slider is in a pull-up start position, with an upper shield of the slider being cut. Fig. 7B is a view showing a positional relationship between the slider, the opening means, and the links in a state where the slider is twisted toward the box pin side until a rear opening of the slider becomes parallel to a front surface of the box body main body portion, with an upper shield of the slider being cut. Fig. 7C is a view showing the positional relationship between the slider, the opening device, and the links in a state where the slider is most twisted toward the box pin side, with the upper shield of the slider being cut. Fig. 8 is a view illustrating a state in which an engaging head portion of a rearmost link of one of the element rows is close to the engaging portion provided on the separable pin. Fig. 9A is a plan view showing a box body and a box pin in a first modification. Fig. 9B is a plan view showing a box body and a box pin in a second modification. Fig. 10 is a plan view showing a box body and a box pin in a third modification. Fig. 11A is a view showing a positional relationship between a slider, an opening device, and links in a state where the slider is in a pull-up start position in the third modification, with an upper shield of the slider being cut. Fig. 11B is a view showing, in the third modification, the positional relationship between the slider, the opening means, and the links in a state where the slider is most twisted toward the box pin side, with an upper shield of the slider being cut. Fig. 12 is a plan view showing a box body and a box pin in a fourth modification. Fig. 13A is a view showing a positional relationship between a slider, an opening means, and links in a state where the slider is in a pull-up start position, with an upper shield of the slider being cut away, in a slide fastener in the prior art. Fig. 13B is a view showing, in a slide fastener of the prior art, the positional relationship between the slider, the opening means, and the links in a state where the slider is most twisted toward the box pin side, with an upper shield of the slider being cut. DESCRIPTION OF THE EMBODIMENTS

[0012] Hereinafter, an embodiment of a slide fastener according to the present invention will be described in detail with reference to the drawings. In the following description, an upper side is a near side with respect to a paper surface of Fig. 1, a lower side is a far side with respect to the paper surface of Fig. 1, a front side is a top side with respect to the paper surface of Fig. 1, a back side is a lower side with respect to the paper surface of Fig. 1, a left side is a left side with respect to the paper surface of Fig. 1, and a right side is the right side with respect to the paper surface of Fig. 1. Accordingly, a left-right direction of the zipper is a width direction of a pair of coupling element rows to be described later, and is also a width direction of a box body to be described later. Furthermore, a front-back direction of the zipper is a longitudinal direction of a box pin, and a direction in which the element rows close when the slider moves is a front side, and a direction in which the element rows open is a back side.

[0013] As in Fig. 1, a slide fastener 10 of the present embodiment includes a pair of slide fastener longitudinal members 22A and 22B including a pair of left and right fastener tapes 20A and 20B and a pair of element rows 30A and 30B respectively provided at mutually facing tape side edge portions 21 of the two fastener tapes 20A and 20B, a slider 40 that engages and separates the two element rows 30A and 30B, top stop members 11 respectively provided on front end sides of the two element rows 30A and 30B, and an opening means 60 provided on rear end sides of the two element rows 30A and 30B.

[0014] The zipper 10 is a back-opening zipper, in which the two rows of coupling elements 30A and 30B are arranged on the lower surfaces of the two fastener tapes 20A and 20B. The zipper 10 is a water-barrier zipper, and a water-barrier film is attached to the upper surfaces of the fastener tapes 20A and 20B.

[0015] The element rows 30A and 30B are coil-shaped element rows formed by winding monofilaments of a synthetic resin in a certain direction, and constitute a plurality of elements 31. Examples of a synthetic resin material of the monofilament include polyester and nylon.

[0016] The element rows 30A and 30B are sewn with sewing threads (not shown) to lower surfaces (rear surfaces) of the tape side edge portions 21 of the fastener tapes 20A and 20B. The slide fastener 10 is a knitted fastener also described in the prior art, and the knitted fastener is obtained by simultaneously knitting the fastener tapes 20A and 20B and knitting coil-shaped element rows into the tape side edge portions 21 of the fastener tapes 20A and 20B.

[0017] The slider 40 includes a slider body 41 and a slider handle 42 attached to an upper surface of the slider body 41. The left and right coupling element rows 30A and 30B engage with each other when the slider 40 is moved toward the upper limiting part 11, and the left and right coupling element rows 30A and 30B are separated when the slider 40 is moved toward the opening device 60. In the present embodiment, the slider 40 is a slider with an automatic stop function, but it may also be a slider without an automatic stop function.

[0018] As in Fig. 2, the body 41 includes an upper shield 43 and a lower shield 44 arranged in parallel so as to be spaced apart from each other in an up-down direction, a guide post 45 connecting the upper shield 43 to the lower shield 44 at front portions thereof, flanges 46a projecting downward along both left and right edge portions of the upper shield 43, flanges 46b projecting upward along both left and right edge portions of the lower shield 44, and a raised portion 47 formed on a lower surface of the upper shield 43 and guiding the left and right coupling element rows 30A and 30B. Between the upper shield 43 and the lower shield 44, a substantially Y-shaped link guide path 48 is formed through which the left and right coupling element rows 30A and 30B are inserted.Between the upper and lower flanges 46a and 46b, a tape groove 49 is formed through which the support tapes 20A and 20B are inserted. The flange can be formed on the upper flap 43 and / or the lower flap 44. For example, in a rear-opening zipper, as shown in FIG. Fig. 1, in which the coupling element rows 30A and 30B are arranged on the lower surfaces of the support belts 20A and 20B, the flange may be provided only on the lower shield 44 of the slider.

[0019] The left and right flanges 46a and 46b are formed to guide return portions 33 of the coupling elements 31 in a separated state on the shoulder opening side of the link guide path 48 and to guide the return portions 33 of the coupling elements 31 in an engaged state on the rear opening side of the link guide path 48 (see Fig. 7A).

[0020] As in Fig. 7A, inner surfaces of the left and right flanges 46a and 46b have parallel portions 46b1 extending from the rear opening and parallel to each other, curved portions 46b2 curved to be separated from each other by the parallel portions 46b1 on the shoulder opening side, and straight portions 46b3 extending to be further separated from each other by the curved portions 46b2 on the shoulder opening side. Although in Fig. 7A only the flange 46b of the lower shield 44 is shown, the flange 46a of the upper shield 43 in a plan view also has the same shape and includes a parallel section, a curved section and a straight section. In Fig. 7A, dot-dash lines indicate boundary positions of the parallel portion 46b1, the curved portion 46b2, and the straight portion 46b3.

[0021] Back to Fig. 1, the opening device 60 comprises a box pin 61 and a box body 62 arranged on one of the left and right coupling element rows 30A and 30B, that is, on the rear end side of the coupling element 30A, and a separable pin 70 arranged on another of the left and right coupling element rows 30A and 30B, that is, on the rear end side of the coupling element 30B, and insertable into the box body 62.

[0022] The separable pin 70 is attached by injection molding to a rear end portion of the tape side edge portion 21 of the fastener tape 20A. As shown in Fig. 3, the separable pin 70 includes a separating pin main body portion 71 having a prismatic shape, a side protruding portion 72 on a front side of the separating pin main body portion 71, which protrudes from a side surface 71a on a box pin side of the separating pin main body portion 71 facing the box body 61 further toward the box body 61 side, and a front protruding portion 73 protruding forward from a front surface 71b of the separating pin main body portion 71.

[0023] An engaging portion 74, which is closest to the box pin 61 and engageable with an engaging head portion 32 of a rearmost link 31a of one element row 30A, is formed in front of the lateral protruding portion 72. A receiving portion 75, which receives a rear half portion of the engaging head portion 32 of the rearmost link 31a of one element row 30A, is provided between the engaging portion 74 and the front protruding portion 73. Further, a fitting recess 76 is formed on the rear side of the lateral protruding portion 72 by cutting out the upper surface side. Further, a stepped surface 77 may be formed along the front-rear direction at a central portion in a width direction of the lateral protruding portion 72 and the engaging portion 74.When the separable pin 70 is pulled out from the slider 40 and a locking pin of the slider 40 falls between the engaging portion 74 and the engaging head portion 32 of the rearmost link 31a, it becomes difficult to pull out the separable pin 70. Since the stepped surface 77 is formed, the locking pin is less likely to fall between the engaging portion 74 and the engaging head portion 32, and the separable pin 70 can be easily pulled out from the slider 40.

[0024] The front protruding portion 73 has a bulging portion 73a that bulges from the side surface 71b located on a side opposite the box pin of the separating pin main body portion 71 to a side opposite the box pin 61, and is connected via a concavely curved surface 73b from the bulging portion 73a to the side surface 71b on the side opposite the box pin. The bulging portion 73a can come into contact with the flange 46b when the slider 40, to be described later, is pulled up (see Fig. 7B), prevents the separable pin 70 from moving in a direction away from the box pin 61 and acts to properly engage the engaging head portion 32 of the rearmost link 31a of the one element row 30A with the engaging portion 74.

[0025] In the present embodiment, the box pin 61 and the box body 62 are integrally formed by injection molding and attached to the rear end portion of the tape side edge portion 21 of the fastener tape 20A. However, the box pin 61 and the box body 62 may be formed separately, and the box pin 61 may be attached to the box body 62.

[0026] As in Fig. 4 to 6, on a side surface of the box pin 61 on the separating pin side, an engaging portion 63 is formed, the side of which protrudes from an upper surface and is inserted into the fitting recess 76 of the separable pin 70. A step portion 64 is formed in front of the engaging portion 63, into which the side protruding portion 72 is inserted. Further, an upright surface 61a is formed along the front-rear direction of the slide fastener 10 on a side surface located on a side opposite to the separating pin side of the box pin 61 so as to face the inner surfaces of the flanges 46a and 46b of the slider 40. The upright surface 61a may be a flat surface extending substantially perpendicularly from a front surface 65a of a box body main body portion 65 toward the front side.A curved surface which is curved and forms an outermost end of the box pin 61 is connected to the front side of the upright surface 61a.

[0027] The box body 62 is formed substantially in the shape of a rectangular parallelepiped and includes a box body main body portion 65 having side surfaces parallel to each other on both sides in the width direction and located along the front-rear direction of the slide fastener 10, and an extension portion 66 provided in front of the box body main body portion 65 and extending forward from the inside of an outer surface of the box body main body portion 65. Therefore, as shown in Fig. 5, a width W1 of the extension portion 66 is smaller than a width of the box body main body portion 65.

[0028] On one side in the width direction of the box body 62, the box pin 61 is integrally formed, and on the other side in the width direction of the box body 62, a separation pin insertion hole 67 is formed, which penetrates in the front-rear direction and also opens to a side surface. Accordingly, the separable pin 70 can be inserted into the separation pin insertion hole 67 on the other side in the width direction of the box body 62.

[0029] An inclined surface 68, which is inclined rearward from the box pin 61 side toward the separating pin insertion hole 67 side, is formed in front of the extending portion 66, that is, on a front surface of the box body 62. An inclination angle θ of the inclined surface 68 is inclined in a range of 5 degrees to 12 degrees with respect to the width direction in which the left and right element rows 30A and 30B are arranged. In the present embodiment, a position where the inclined surface 68 is at the same height as the front surface 65a of the box body main body portion 65 is referred to as a separating pin insertion hole side end portion 68a. The separating pin insertion hole side end portion 68a is connected to the front surface 65a of the box body main body portion 65.

[0030] Accordingly, the box pin 61 is provided so as to protrude forward from the inclined surface 68 of the extending portion 66 on one side in the width direction of the box body 62.

[0031] As in Fig. 6, a length L1 of a portion of the box pin 61 protruding from the box body 62 is set to 35% to 45% of the length L from a bottom surface 67a of the partition pin insertion hole 67 of the box body 62 to the outermost end of the box pin 61 in the longitudinal direction of the box pin 61.

[0032] In the slide fastener 10 configured as described above, when the slide fastener 10 is closed by engaging the two rows of coupling elements 30A and 30B, the slider 40 is first pulled downward until the slider 40 is brought into contact with the inclined surface 68 which is the front surface of the box body 62.

[0033] Here, as in Fig. 7A, since the rearmost link 31a of the one element row 30A is in a state of being inserted deeper into a rear opening side of the slider 40, the engaging head portion 32 of the rearmost link 31a of the one element row 30A approaches the link guide path 48 on the separable pin 70 side. That is, in plan view, the engaging head portion 32 of the rearmost link 31a of the one element row 30A approaches the link guide path 48 on the separable pin 70 side via an extension line X of a side surface of the engaging portion 63 of the box pin 62 in the left-right direction.

[0034] However, the flanges 46a and 46b on the box pin side are separated from the box body main body portion 65 compared to the flanges 46a and 46b on the separation pin side, and the slider 40 is inclined with respect to the front surface of the box body main body portion 65, that is, the width direction in which the left and right element rows 30A and 30B are arranged.

[0035] Accordingly, since the link guide path 48 on the separable pin 70 side is inclined in a direction away from the engaging head portion 32 of the rearmost link 31a of one element row 30A, the link guide path 48 on the separable pin 70 side can be secured to a large extent. Accordingly, collision between the engaging portion 74 of the separable pin 70 and the engaging head portion 32 of the rearmost link 31b is minimized, and the separable pin 70 is smoothly inserted into the separating pin insertion hole 67 of the box body 62 via the link guide path 48 of the slider 40.

[0036] By setting the inclination angle θ of the inclined surface 68 to 5 degrees or more with respect to the width direction in which the left and right element rows 30A and 30B are arranged, the above-described link guide path 48 on the separable pin 70 side can be largely secured when the separable pin 70 is inserted. Furthermore, by setting the inclination angle θ to 12 degrees or less, the link guide path 48 on the separable pin 70 side and the separable pin insertion hole 67 of the box body 62 are prevented from bending significantly, which makes insertion of the separable pin 70 difficult.

[0037] As in Fig. 7A, a state in which the separable pin 70 is inserted into the separating pin insertion hole 67 of the box body 62 and the slider 40 is in contact with the inclined surface 68 of the box body 62 is a pull-up start position of the slider 40, at which the slider 40 is pulled up.

[0038] In the pull-up start position, the engaging head portion 32 of the rearmost link 31a of one element row 30A contacts the engaging portion 74 provided on the separable pin 70.

[0039] In the present embodiment, the engaging head portion 32 of the rearmost link 31a of the one element row 30A is in contact with the engaging portion 74 provided on the separable pin 70 in the pull-up start position of the slider 40, but may be close to the engaging portion 74 without contacting the engaging portion 74. Here, the fact that the engaging head portion 32 of the rearmost link 31a is close to the engaging portion 74 provided on the separable pin 70 means that a distance D1 between the engaging head portion 32 of the rearmost link 31a and the engaging portion 74 of the separable pin 70 is shorter than a distance D2 between the engaging head portion 32 of the rearmost link 31a and the guide post 45 in a plan view as shown in FIG. Fig. 8 shown.

[0040] As described above, in the pull-up start position of the slider 40, the rearmost links 31a and 31b of the two element rows 30A and 30B are in a state of being inserted deeper into the rear opening side of the slider. In this state, the entire upright surface 61a of the box pin 61 formed on the side surface opposite to the side facing the separable pin 70 faces the parallel portions 46b1 of the flange portions 46a and 46b. Further, the turn portion 33 of the rearmost link 31a of the one element row 30A is guided by the curved portions 46b2 of the flange portions 46a and 46b.

[0041] In the slide fastener 10 of the present embodiment, since the water-barrier film is attached to the fastener tapes 20A and 20B, a force is required to pull up the slider 40 in the pull-up start position of the slider 40, and when attempting to pull up the slider 40, the slider 40 is pulled up in the order of Fig. 7B and Fig. 7C is twisted towards the box pin side, starting from a connecting portion 69 between the inclined surface 68 and the upright surface 61a of the box pin 61.

[0042] At this time, in the pull-up start position of the slider, the rearmost link 31a of one element row 30A comes into contact with the flange portions 46a and 46b, and the engaging head portion 32 of the rearmost link 31a comes close to or comes into contact with the engaging portion 74 provided on the separable pin 70. Furthermore, the engaging head portion 32 of the rearmost link 31a of one element row 30A does not contact the engaging head portion 32 of the rearmost link 31b of the other element row 30B, but they are closer to each other than in the case of the Fig. 13A shown zipper in the prior art.

[0043] Accordingly, when the slider 40 is rotated, the engaging head portion 32 of the rearmost link 31a of one element row 30A is also in a state of contact with the engaging head portion 32 of the rearmost link 31b of the other element row 30B, which is pressed by the flange portions 46a and 46b, as shown in Fig. 7B, while being in contact with the engaging portion 74 provided on the separable pin 70. Then, when the slider 40 is further rotated, the engaging head portion 32 of the rearmost link 31a of one element row 30A is in a state of passing between the engaging portion 74 and the engaging head portion 32 of the rearmost link 31b of the other element row 30B and is in an engaged state. Therefore, the engaging head portions 32 of the rearmost links 31a and 31b are prevented from colliding with each other and from being properly engaged with each other, and the slider 40 is then smoothly pulled upward.

[0044] As described above, according to the slide fastener 10 of the present embodiment, in the pull-up start position of the slider 40, the engaging head portion 32 of the rearmost link 31a of one element row 30A is close to or in contact with the engaging portion 74 provided on the separable pin 70. Accordingly, the rearmost links 31a and 31b of the two element rows 30A and 30B can be prevented from colliding with each other and not being properly engaged with each other even if the slider 40 is rotated, and the operability of pulling up the slider 40 can be improved.

[0045] According to the slide fastener opening device 60 of the present embodiment, the length L1 of the portion of the box pin 61 protruding from the box body 62 is set to 35% to 45% of the length L from the bottom surface 67a of the separating pin insertion hole 67 of the box body 62 to the outermost end of the box pin 61 in the longitudinal direction of the box pin 61. That is, by shortening the length of the box pin 61 so that the length L1 of the box pin 61 is equal to or less than 45% of the length L, the rearmost link 31a of the one element row 30A is in a state of being inserted deeper into the rear opening side of the slider 40 at the pull-up start position of the slider 40.Accordingly, even if the slider 40 is twisted during lifting, the rearmost links 31a and 31b of the two element rows 30A and 30B can be prevented from colliding with each other and not being properly engaged with each other, and the operability of pulling up the slider 40 can be improved. On the other hand, by setting the length L1 of the box pin 61 to 35% or more of the length L, the insertability of the separable pin 70 and the appearance of the box body 62 can be maintained.

[0046] The present invention is not limited to the above-mentioned embodiments and can be appropriately modified without departing from the gist of the present invention.

[0047] In a first, in Fig. 9A, the extending portion 66 of the box body 62 is configured to have side surfaces along the front-rear direction of the slide fastener 10 on both the box pin 61 side and the separating pin insertion hole 67 side.

[0048] In this case, compared with the above embodiments, the length L1 of the portion of the box pin 61 protruding from the box body 62 becomes shorter, and a ratio of the length L1 of the box pin 61 to the length L from the bottom surface 67a of the separation pin insertion hole 67 of the box body 62 to the outermost end of the box pin 61 in the longitudinal direction of the box pin 61 becomes smaller. Accordingly, in the pull-up start position of the slider 40, the rearmost link 31a of the one element row 30A is in a state of being inserted deeper into the rear opening side of the slider 40, and the engaging head portion 32 of the rearmost link 31a of the one element row 30A is more likely to come close to or into contact with the engaging portion 74 provided on the separable pin 70.

[0049] In a second, in Fig. 9B, the box body 62 may have a configuration in which the inclined surface 68 is formed on the front surface of the box body main body portion 65 by extending the box body main body portion 65 in the longitudinal direction of the box pin 61 without providing the extending portion 66.

[0050] Also in this case, as in the first modification, the length L1 of the portion of the box pin 61 protruding from the box body 62 becomes shorter, and a ratio of the length L1 of the box pin 61 to the length L from the bottom surface 67a of the partition pin insertion hole 67 of the box body 62 to an outermost end of the box pin 61 in the longitudinal direction of the box pin 61 becomes smaller.

[0051] In a third, in Fig. 10, in the box body 62, the extension portion 66 is not provided, and the box body main body portion 65 is elongated in the longitudinal direction of the separable pin 61, and a front surface of the box body main body portion 65 is formed along the width direction of the box body 62 without having the inclined surface 68.

[0052] In this case, similar to the above embodiments, a ratio of the length L1 of the box pin 61 to the length L from the bottom surface 67a of the partition pin insertion hole 67 of the box body 62 to an outermost end of the box pin 61 in the longitudinal direction of the box pin 61 is set to 35% to 45%. Accordingly, as shown in Fig. 11A, in the pull-up start position of the slider 40, the rearmost link 31a of the one element row 30A is in a state of being inserted deeper into the rear opening side of the slider 40, and the engaging head portion 32 of the rearmost link 31a of the one element row 30A is in a state of being close to or in contact with the engaging portion 74 provided on the separable pin 70.

[0053] As in Fig. Further, as shown in FIG. 11B, even when the slider 40 is rotated, the engaging head portion 32 of the rearmost link 31a of one element row 30A is in a state of passing between the engaging portion 74 and the engaging head portion 32 of the rearmost link 31b of the other element row 30B and is in an engaged state while contacting the engaging portion 74 provided on the separable pin 70. This prevents the engaging head portions 32 of the rearmost links 31a and 31b from colliding with each other and from being properly engaged with each other, and the slider 40 is smoothly pulled upward.

[0054] In the case of a configuration in which the box body 62 does not have an inclined surface as in the third modification, in order to ensure the insertability of the separable pin 70 into the box body 62, the separable pin 70 may be configured such that a concave curved surface 73b is further recessed to make the separable pin 70 thinner while maintaining a width of the bulge portion 73a of the front protruding portion 73.

[0055] In a fourth, in Fig. In the modification shown in FIG. 12, the box body 62 does not have an inclined surface as in the third modification, but the box body 62 has a box body main body portion 65 and an extension portion 66 as in the above embodiment. Therefore, the front surface of the extension portion 66 is parallel to the front surface of the box body main body portion 65 and is formed along a width direction of the box body 62.

[0056] ?Furthermore, in the above embodiments, an example was given of the case where the present invention is applied to a back-opening type slide fastener in which the element rows are arranged on the lower surfaces of the fastener tape, but the present invention is not limited thereto and can also be applied to a front-opening type slide fastener in which the element rows are arranged on the upper surfaces of the fastener tape.

[0057] In the above embodiments, the opening means of the present invention is applied to the water-barrier type slide fastener in which the water-barrier film is attached to a knitted fastener, but the present invention is not limited thereto and can be suitably applied to a slide fastener in which a slider tends to be twisted when pulled up.

[0058] As described above, the following items are disclosed in this specification. (1) A zipper comprising: a pair of coupling element rows comprising a pair of fastener tapes and a pair of coupling element rows, each provided at mutually facing tape side edge portions of the two fastener tapes; an opening device comprising a box pin and a box body arranged on the rear end side of one of the two rows of coupling elements, and a separable pin arranged on the rear end side of another of the two rows of coupling elements; and a slider comprising an upper shield and a lower shield arranged in parallel so as to be spaced apart from each other in an up-down direction, a guide column connecting the upper shield to the lower shield at front end portions thereof, and a flange portion provided at a rear side edge portion of the upper shield and / or the lower shield and adapted to engage and separate the two rows of coupling elements, wherein the box body is provided with the box pin which protrudes forward from the box body on one side in a width direction in which the two rows of coupling elements are arranged, and on the other side in the width direction a separating pin insertion hole is formed into which the separable pin can be inserted, the separable pin has an engaging portion adapted to be engaged with an engaging head portion of a rearmost link of one of the coupling element rows, and when the separable pin is inserted into the separable pin insertion hole of the box body and the slider is in contact with a front surface of the box body in a pull-up start position of the slider, the engaging head portion of the rearmost link of the one element row is close to or in contact with the engaging portion provided on the separable pin. According to this configuration, even if the slider is twisted when pulling up, the rearmost links of the two coupling element rows can be prevented from colliding with each other and not being properly engaged with each other, and the operability when pulling up the slider can be improved. (2) The zipper according to (1), in which the front surface of the box body has a surface inclined backward from one side of the box pin to one side of the separator pin insertion hole, and, and the slider is inclined with respect to the width direction in which the two rows of coupling elements are arranged in the pull-up start position of the slider. According to this configuration, in a state where the slider contacts the inclined surface which is the front surface of the box body, collision between the engaging portion of the separable pin and the engaging head portion of the rearmost link of the other element row can be minimized, and the separable pin can be smoothly inserted into the separating pin insertion hole of the box body. (3) The zipper according to (2), in which the inclined surface is inclined in a range of 5 degrees to 12 degrees with respect to the width direction in which the two rows of coupling elements are arranged. According to this configuration, in the state where the slider is in contact with the inclined surface which is the front surface of the box body, the separable pin can be smoothly inserted into the separating pin insertion hole of the box body. (4) The zipper according to (2) or (3), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming the front surface of the box body, and a width of the extension portion is smaller than a width of the box body main body portion, and an end portion on the side of a separating pin insertion hole of the inclined surface is connected to a front surface of the box body main body portion. According to this configuration, at the end portion on the partition pin insertion hole side of the inclined surface, since the inclined surface is connected to the front surface of the box body main body portion without a step, a size of the extending portion can be reduced, and the appearance of the box body can be maintained as much as possible. (5) The zipper according to any one of (1) to (3), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming the front surface of the box body, and a width of the extension portion is smaller than a width of the box body main body portion. According to this configuration, the appearance of the box body can be maintained as much as possible by reducing the size of the extension portion while the size of the box body main body portion is the same as that of a prior art product. (6) The zipper according to any one of (1) to (5), in which the slider comprises parallel sections extending from a rear opening and parallel to each other on an inner surface of the flange section, the box pin has an upright surface along a front-to-back direction of the zipper on a side surface opposite a side facing the separable pin, and the entire upright surface of the box pin faces the parallel sections of the flange section in the pull-up start position of the slider. According to this configuration, in the pull-up start position of the slider, the rearmost link of one of the element rows is in a state of being inserted deeper into one side of a rear opening of the slider, and the engaging head portion of the rearmost link of one of the element rows is likely to come close to or into contact with the engaging portion provided on the separable pin. (7) An opening device for a zipper, comprising: a box pin and a box body adapted to be arranged on a rear end side of a coupling element row of a pair of coupling element rows; and a separable pin adapted to be arranged on the side of a rear end of the other of the two rows of coupling elements, wherein the box body is provided with the box pin which protrudes forward from the box body on one side in a width direction of the box body, and on the other side in the width direction of the box body, a separating pin insertion hole is formed into which the separable pin can be inserted, and a length of a portion of the box pin protruding from the box body is 35% to 45% of a length from a bottom surface of the partition pin insertion hole of the box body to an outermost end of the box pin in a longitudinal direction of the box pin. According to this configuration, a rearmost link of one of the element rows is in a state of being inserted deeper into one side of a rear opening of the slider in the pull-up start position of the slider, and even in a case where the slider is twisted when pulled up, the rearmost links of the two element rows can be prevented from colliding with each other and not being properly engaged with each other, and the operability when pulling up the slider can be improved. (8) The opening device for the zipper according to (7), in which a front surface of the box body has a surface inclined rearward from a side of the box pin to a side of the separator pin insertion hole. According to this configuration, in a state where the slider contacts the inclined surface which is the front surface of the box body, collision between the engaging portion of the separable pin and the engaging head portion of the rearmost link of the other element row can be minimized, and the separable pin can be smoothly inserted into the separating pin insertion hole of the box body. (9) The opening device for the zipper according to (8), in which the inclined surface is inclined in a range of 5 degrees to 12 degrees with respect to the width direction of the box body. According to this configuration, in the state where the slider is in contact with the inclined surface which is the front surface of the box body, the separable pin can be smoothly inserted into the separating pin insertion hole of the box body. (10) The opening device for the zipper according to (8) or (9), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming the front surface of the box body, and a width of the extension portion is smaller than a width of the box body main body portion, and an end portion on the side of a separating pin insertion hole of the inclined surface is connected to a front surface of the box body main body portion. According to this configuration, at the end portion on the partition pin insertion hole side of the inclined surface, the inclined surface is connected to the front surface of the box body main body portion without a step, so that the size of the extension portion can be reduced and the appearance of the box body can be maintained as much as possible. (11) The opening device for the zipper according to any one of (7) to (9), in which the box body comprises a box body main body portion provided with the separating pin insertion hole, and an extension portion continuous from the box body main body portion and forming a front surface of the box body, and a width of the extension portion is smaller than a width of the box body main body portion. According to this configuration, the appearance of the box body can be maintained as much as possible by reducing the size of the extension portion while the size of the box body main body portion is the same as that of a prior art product. LIST OF REFERENCE SYMBOLS 10 zipper 11 upper boundary part 20A, 20B carrying strap 21 Band side edge section 22A, 22B zipper lengthwise part 30A, 30B coupling element series 31 coupling element 40 sliders 43 upper shield 44 lower shield 45 Guide column 46a, 46b flange section 60 Opening device 61 box pin 61a upright surface 62 box bodies 65 Box body main body section 66 extension section 67 Separator pin insertion hole 68 inclined surface 70 detachable pin 74 intervention section QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 3621006B

[0004]

Claims

[1] Zipper (10) comprising: a pair of zipper longitudinal members (22A, 22B) having a pair of fastener tapes (20A, 20B) and a pair of coupling element rows (30A, 30B) respectively provided at mutually facing tape side edge portions (21) of the two fastener tapes; an opening device (60) comprising a box pin (61) and a box body (62) arranged on the rear end side of one of the two rows of coupling elements, and a separable pin (70) arranged on the rear end side of the other of the two rows of coupling elements; and a slider (40) comprising an upper shield (43) and a lower shield (44) arranged in parallel so as to be spaced apart from each other in an up-down direction, a guide column (45) connecting the upper shield (43) to the lower shield (44) at front end portions thereof, and a flange portion (46a, 46b) provided at a rear side edge portion of the upper shield (43) and / or the lower shield (44) and adapted to engage and separate the two coupling element rows (30A, 30B), wherein the box body (62) is provided with the box pin (61) which protrudes forward from the box body on one side in a width direction in which the two rows of coupling elements are arranged, and on the other side in the width direction a separating pin insertion hole (67) is formed into which the separable pin (70) can be inserted, the separable pin (70) has an engaging portion (74) adapted to be engaged with an engaging head portion (32) of a rearmost link (31a) of the one coupling element row (30A), and when the separable pin (70) is inserted into the separating pin insertion hole (67) of the box body (62) and the slider (40) is in contact with a front surface of the box body (62) in a pull-up start position of the slider, the engaging head portion (32) of the rearmost link (31a) of the one element row (30A) is close to or in contact with the engaging portion (74) provided on the separable pin (70). [2] Zipper (10) according to claim 1, wherein the front surface of the box body (62) has a surface (68) inclined backward from one side of the box pin (61) to one side of the separating pin insertion hole (67), and the slider (40) is inclined with respect to the width direction in which the two rows of coupling elements are arranged in the pull-up start position of the slider (40). [3] The slide fastener (10) according to claim 2, wherein the inclined surface (68) is inclined in a range of 5 degrees to 12 degrees with respect to the width direction in which the coupling element rows are arranged. [4] Zipper (10) according to claim 2 or 3, wherein the box body (62) comprises a box body main body portion (65) provided with the separating pin insertion hole, and an extension portion (66) continuous from the box body main body portion (65) and forming the front surface of the box body, a width (W1) of the extension section is smaller than a width (W2) of the box body main body section, and an end portion (68a) on the separating pin insertion hole side of the inclined surface (68) is connected to a front surface (65a) of the box body main body portion (65). [5] Zipper (10) according to one of claims 1 to 3, wherein the box body (62) comprises a box body main body portion (65) provided with the separating pin insertion hole, and an extension portion (66) continuous from the box body main body portion (65) and forming the front surface of the box body, and a width (W1) of the extension section is smaller than a width (W2) of the box body main body section. [6] Zipper (10) according to one of claims 1 to 5, wherein the slider (40) comprises parallel sections (46b1) extending from a rear opening and parallel to each other on an inner surface of the flange section (46a, 46b), the box pin (61) has an upright surface (61a) along a front-to-back direction of the zipper on a side surface opposite to a side facing the separable pin, and the entire upright surface (61a) of the box pin (61) faces the parallel portions of the flange portion in the pull-up start position of the slider (40). [7] Opening device (60) for a zipper, comprising: a box pin (61) and a box body (62) adapted to be arranged on the rear end side of a coupling element row of a pair of coupling element rows (30A, 30B); and a separable pin (70) adapted to be arranged on the side of a rear end of the other of the two coupling element rows (30A, 30B), wherein the box body (62) is provided with the box pin (61) which protrudes forward from the box body on one side in a width direction of the box body, and on the other side in the width direction of the box body, a separating pin insertion hole (67) is formed into which the separable pin (70) can be inserted, and a length (L1) of a portion of the box pin protruding from the box body 62 is 35% to 45% of a length (L) from a bottom surface (67a) of the separating pin insertion hole (67) of the box body to an outermost end of the box pin in a longitudinal direction of the box pin. [8] The slide fastener opening device (60) according to claim 7, wherein a front surface of the box body (62) has a surface (68) inclined rearward from a side of the box pin (61) to a side of the separating pin insertion hole (67). [9] The slide fastener opening device (60) according to claim 8, wherein the inclined surface (68) is inclined in a range of 5 degrees to 12 degrees with respect to the width direction of the box body. [10] Opening device (60) for the zipper according to claim 8 or 9, wherein the box body (62) comprises a box body main body portion (65) provided with the separating pin insertion hole, and an extension portion (66) continuous from the box body main body portion (65) and forming the front surface of the box body, a width (W1) of the extension section is smaller than a width (W2) of the box body main body section, and an end portion (68a) on the separating pin insertion hole side of the inclined surface (68) is connected to a front surface (65a) of the box body main body portion (65). [11] Opening device (60) for the zipper according to one of claims 7 to 9, wherein the box body (62) comprises a box body main body portion (65) provided with the separating pin insertion hole, and an extension portion (66) continuous from the box body main body portion (65) and forming a front surface of the box body, and a width (W1) of the extension section is smaller than a width (W2) of the box body main body section.

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