TW202400041A - Reverse-opening slide fastener - Google Patents

Abstract

A reverse-opening slide fastener (1) according to the present invention comprises: a pair of element rows (6) that are fixed along opposing side edge parts of a pair of pieces of tape (5); an insert rod (7) and a box rod (8) that are separately fixed to rear end parts of the pair of pieces of tape; and a front-side forward slider (3) and rear-side reverse slider (4) that are movable frontward and backward along the opposing side edge parts of the pair of pieces of tape. The element row on the box rod side is provided with a continuous element part (61) in which a plurality of elements (6a) are continuous, and an independent element (21) on the box rod side. The independent element is accommodated inside the forward slider in a state where the insert rod is insertable/removable into/from the forward slider and the reverse slider. The independent element is disposed between the box rod and the continuous element part on the box rod side, and at an interval in the front-rear direction from each of the box rod and the continuous element part on the box rod side. Because there are intervals in the front-rear direction, the piece of tape on the box rod side deforms easily, and the insert rod can be easily inserted in the pair of sliders.

Description

Reverse zipper

The present invention relates to a reverse-opening zipper with a pair of chain belts and a pair of sliders. The pair of chain belts extend forward and backward and can be opened and closed opposite to the left and right. The pair of sliders can move along the opposite direction of the pair of chain belts. Move forward and backward toward the side edge, and open a pair of chain belts in completely opposite directions.

As an example of a conventional reverse-opening slide fastener, one equipped with a pair of zipper stringers, an opening and closing slider, and a reverse-opening slider for opening and closing the pair of zipper stringers is known (Patent Documents 1 and 2).

The reverse opening zipper of Patent Document 1 is as follows. The zipper chain tape on the barrel pin side is provided with coil-shaped zipper teeth, meshing reinforcements and barrel pins in sequence along the opposite side edges of the zipper fastener cloth. Furthermore, the fastener elements are continuous with the meshing reinforcement. That is, the zipper element and the meshing reinforcement are integrated.

Moreover, the reverse opening zipper of patent document 2 is as follows. The zipper chain tape on the barrel pin side is continuously arranged with coil-shaped linear zipper teeth and barrel pins along the opposite side edges of the zipper fastener cloth. That is, the linear fastener element and the cylinder pin are integrated. In addition, when the latch is inserted into and removed from the pair of sliders, the end of the continuous zipper element on the barrel pin side, that is, the end of the side continuous with the barrel pin, is located closer to the guide post of the reverse opening slider than the forward opening slider. Slider side. That is, in a state where the latch is inserted into and removed from the pair of zipper sliders, the end of the linear zipper element on the cylinder pin side is deeply inserted into the inside of the slider for front opening.

Hereinafter, when describing the reverse zippers of Patent Documents 1 and 2, the zipper tape will be called a chain tape, the zipper elements and the linear zipper elements will be called coil elements, and the zipper cloth will be called a fastener cloth. , the sliding parts for forward opening are called forward sliding parts, and the sliding parts for reverse opening are called reverse sliding parts.

Furthermore, in the reverse-opening zippers of Patent Documents 1 and 2, the opposing side edge portions of the chain strap on the barrel pin side have the barrel pin and the coil sprocket teeth fixed to the chain fabric, so they are not separated from the opposing side edge portions. Compared with the other parts (only the chain fabric part), the rigidity is higher, and as long as no force is applied, it will become an approximately straight line. In addition, the coil sprocket teeth are composed of a plurality of continuous sprocket teeth. Moreover, since the chain belt on the barrel pin side has coil sprockets fixed along the opposite side edges of the zipper fastener cloth, compared with a case where a plurality of sprocket teeth are discontinuous, the opposite side edges of the zipper fastener cloth are The shape can easily become almost a straight line. Prior technical literature patent documents

Patent Document 1: International Publication No. 2010/089846 Patent Document 2: Japanese Patent No. 4762108

[Problem to be solved by the invention]

However, it is assumed that a pair of coil sprockets are meshed with each other by, for example, half of the total length of the opposing side edge portions. In this state, a pair of coil sprocket teeth is formed with a portion that meshes in a straight line and a portion that branches to the left and right. Moreover, the part of the pair of coil sprockets that meshes in a straight line extends along a straight line with respect to the forward slider toward the reverse slider, and the part of the pair of coil sprocket teeth that branches to the left and right is away from the forward slider to the left and right with the forward slider as the center. That is, the pair of coil sprocket teeth is deformed from a state extending in parallel along a straight line inside the positive slider to a state branching to the left and right.

This deformation represents the application of force against the rigidity of the coil sprockets. Therefore, when the latch is pulled out from the pair of sliders and the pair of chain belts are separated, the opposite side edges of the chain belt become approximately a straight line due to the rigidity of the coil sprockets.

Furthermore, in the reverse slider of Patent Document 2, with the latch inserted into the pair of sliders, as mentioned above, the end of the coil sprocket on the barrel pin side is located closer to the guide post of the forward slider than the reverse slider. side, the coil sprocket teeth on the barrel pin side are deeply inserted into the inside of the positive slide. Therefore, when the latch is to be inserted into a pair of sliders, the coil sprockets on the cylinder pin side must be deformed against their rigidity, making it difficult for the latch to be inserted into the pair of sliders.

In addition, when the latch is inserted, the ideal posture of the forward slider and the reverse slider is a state in which the forward slider and the reverse slider are adjacent to each other in the front and rear, and the guide posts of each other are located in symmetrical positions in the front and rear. In this posture, after inserting the latch into the pair of sliding parts, the pair of chain straps can be closed by simply moving the positive sliding part away from the reverse sliding part. When the pair of chain straps are in an ideal posture, the chain strap on the cylinder pin side and the chain strap on the latch side are curved inside the positive slider and branch to the left and right as they move forward with respect to the positive slider.

However, since the coil sprockets tend to become in a straight line due to their rigidity, before the pin is inserted, the coil sprockets on the cylinder pin side easily become in a straight line extending forward from the reverse sliding piece, even when the forward sliding piece and the reverse sliding piece are connected. When the sliding parts are adjacent to each other front and back, it is easy to become a state in which the forward sliding part is tilted relative to the reverse sliding part. The greater the slope, the more difficult it is to insert the pin.

Furthermore, the reverse-opening zipper disclosed in Patent Document 1 does not disclose the relationship between the guide post (connecting post) and the coil sprocket element in a state where the latch is inserted into the pair of sliders.

However, the reverse opening zipper disclosed in Patent Document 1 has a structure in which the coil sprockets on the barrel pin side and the meshing reinforcing body are integrated, and the integral body and the barrel pin are separated. However, there is a problem that the latch is difficult to insert.

As mentioned above, the reverse-opening zippers disclosed in Patent Documents 1 and 2 have a common problem of difficulty in inserting the latch.

The present invention was created in consideration of the above-mentioned actual situation, and its purpose is to make it easy for the latch in the reverse-opening zipper to be inserted into a pair of sliders. [Technical means to solve problems]

The reverse-opening zipper of the present invention includes: a pair of chain straps that extend forward and backward and can be opened and closed opposite to the left and right; and a forward sliding piece and a reverse sliding piece that can be moved along the opposite side edges of the pair of chain straps. The forward sliding part moves forward and backward, and the forward sliding part opens a pair of chain belts in a forward direction, and the reverse sliding part opens a pair of chain belts in a backward direction. Moreover, a pair of chain belts includes: a pair of chain cloths extending front and back and facing left and right; a pair of chain tooth rows composed of a plurality of chain teeth arranged front and back in a row, and along the gap between the pair of chain cloths The opposite side edges are respectively fixed and can be cooperatively engaged and separated; and the latch pin and the barrel pin are respectively fixed on the rear ends of a pair of chain cloths. When the forward sliding part and the reverse sliding part are on a pair of chain cloths When the ends are connected front and back, the latch can be inserted into and removed from the forward sliding part and the reverse sliding part. Furthermore, a pair of sprocket element rows has a continuous sprocket element portion in which a plurality of sprocket teeth are connected back and forth. The reverse opening zipper of the present invention is based on the above premise.

Furthermore, in the first form of the reverse opening zipper of the present invention, the sprocket elements on the cylinder pin side are provided with independent sprocket elements on the cylinder pin side that can be engaged with and separated from the chain belt on the latch side, in addition to the continuous element portion. The independent sprocket tooth portion on the cylinder pin side is composed of one or a plurality of sprocket teeth, that is, independent sprocket teeth, of the chain cloth fixed on the cylinder pin side. Moreover, the independent sprocket teeth at the rear end are accommodated inside the forward sliding piece in a state where the latch can be inserted into and removed from the forward sliding piece and the reverse sliding piece. Each of them is arranged between the continuous sprocket portion on the cylinder pin side and the cylinder pin in a state of being spaced from front to back.

Furthermore, in the first form of the reverse-opening zipper of the present invention, the row of elements on the latch side may be composed of only the continuous element portion on the latch side. However, in order to easily insert the latch into the forward slider and the reverse slider, it is ideal as follows. That is, the sprocket element on the latch side has, in addition to the continuous sprocket element on the latch side, an independent sprocket element on the latch side that can be engaged with and separated from the chain belt on the cylinder pin side. Furthermore, the independent sprocket element portion on the latch side is composed of one or a plurality of sprocket teeth, that is, independent sprocket teeth, which are fixed to the fastener cloth on the latch side. Moreover, the independent sprocket teeth at the rear end of the latch side are accommodated inside the forward sliding piece in a state where the latch can be inserted into and removed from the forward sliding piece and the reverse sliding piece. Each of the part and the latch is arranged between the continuous sprocket part and the latch on the latch side in a state of being separated from the front and rear.

Furthermore, in the first form of the reverse opening zipper of the present invention, when the independent fastener element on the latch side is provided, the independent fastener element on the latch side can be meshed with and separated from the continuous fastener element on the barrel pin side. However, in order to improve the connection strength of a pair of chain straps in a closed state, it is ideal as follows. That is, the independent sprocket teeth at the rear end of the latch side can be meshed with and separated from the continuous sprocket teeth on the barrel pin side and the independent sprocket teeth on the barrel pin side.

Furthermore, in the first form of the reverse opening zipper of the present invention, the independent sprocket teeth on the barrel pin side can have any structure in terms of dimensions corresponding to the thickness direction of the fastener fabric. However, what is ideal is as follows. That is, the independent sprocket teeth on the cylinder pin side have: a fixing part that is fixed to the chain cloth on the cylinder pin side; and an engaging part that extends from the fixed part to the chain cloth on the latch side and engages with the chain belt on the latch side; and Regarding the dimensions corresponding to the thickness direction of the fastener fabric, the thickness of the engaging portion is thinner than the thickness of the fixing portion.

Furthermore, in the first form of the reverse-opening slide fastener of the present invention, the independent sprocket teeth on the barrel pin side may have any structure. However, if the size between the fixed portion of the independent sprocket teeth on the cylinder pin side and the continuous sprocket tooth portion on the cylinder pin side is too wide, the forward sliding element and the reverse sliding element will be easily pulled out of the excessively wide gap, which is not ideal. . Therefore, in order to prevent the forward sliding member and the reverse sliding member from being easily pulled out from the chain belt on the cylinder pin side, it is ideal as follows. That is, the engaging portion of the independent sprocket teeth on the barrel pin side has: a neck extending from the fixed portion to the chain cloth on the latch side; and a head portion extending from the neck to the chain cloth on the latch side and protruding forward and backward; and The fixed part of the independent sprocket on the barrel pin side extends further forward than the head.

Furthermore, in the first form of the reverse-opening zipper of the present invention, the independent sprockets on the barrel pin side can be engaged and separated from the chain belt on the latch side, and the engagement and separation can be performed in any manner. However, in order to improve the connection strength of a pair of chain straps in a closed state, it is ideal as follows. That is, the engaging portion of the independent sprocket teeth on the barrel pin side has: a neck extending from the fixed portion to the chain cloth on the latch side; and a head portion extending from the neck to the chain cloth on the latch side and protruding forward and backward; and The head can engage and separate from the chain belt on the latch side.

An example of the specific structure of the continuous element portion and the specific structure of the independent element on the cylinder pin side is as follows. That is, the independent sprocket teeth on the barrel pin side are injection molded into the chain fabric, and the continuous sprocket teeth are coil-shaped or zigzag-shaped monofilaments bent in three-dimensional directions.

Furthermore, the second aspect of the reverse opening zipper of the present invention is that in addition to the above premise, the front slider is provided with a guide post that guides the pair of continuous sprocket elements in a state of being separated to the right and left, so that the latch is inserted into and removed from the front slider. In the state of the reverse sliding member, the rear end of the continuous sprocket tooth portion on the barrel pin side is located further forward than the rear end of the guide column. [Effects of the invention]

If the reverse opening zipper of the present invention has an independent sprocket element on the cylinder pin side, the portion between the independent sprocket element on the cylinder pin side and the cylinder pin, and the continuous sprocket element on the cylinder pin side and the independent chain on the cylinder pin side The part between the teeth has the gap between the front and rear and becomes soft and becomes an easily deformable part (hereinafter referred to as the "easy deformation part"). The opposite side edges of the chain belt on the barrel pin side Improved softness. Therefore, when the latch is inserted into the forward slider and the reverse slider, the independent sprocket tooth portion and the continuous sprocket tooth portion on the barrel pin side are respectively inclined relative to the straight line direction of the barrel pin, and the slope of the forward slider relative to the reverse slider is become smaller. Moreover, in the reverse-opening zipper of the present invention, in a state where the front sliding member and the reverse sliding member are adjacent to each other front and rear at the ends behind a pair of fastener cloths, the front sliding member and the reverse sliding member can easily become an ideal posture that is symmetrical up and down, so it is easy to insert. latch.

Furthermore, if the reverse zipper of the present invention has an independent fastener element on the latch side, for the same reason as if it has an independent fastener element on the barrel pin side, when the latch is inserted into the forward slider and the reverse slider, the latch will The independent sprocket tooth part and the continuous sprocket tooth part on the side are respectively inclined relative to the straight line direction of the latch. When the forward sliding part and the reverse sliding part are adjacent to each other behind a pair of chain cloths, it is easy to achieve the ideal front-to-back symmetrical posture. Therefore, it is easy to insert the latch. Moreover, in the reverse opening zipper of the present invention, the independent sprocket tooth portion on the latch side can engage and separate from the chain belt on the barrel pin side, so the connection strength of the pair of chain belts is improved when closed.

Regarding the reverse opening zipper of the present invention, if the latch is inserted into and removed from the forward slider and the reverse slider, the rear end of the continuous sprocket tooth portion on the barrel pin side is located closer to the front than the rear end of the guide post of the forward slider. Compared with, for example, the rear end of the continuous sprocket portion on the barrel pin side is the same as the rear end of the guide column or the rear end of the continuous sprocket portion on the barrel pin side is located further back than the rear end of the guide column, the continuous chain on the barrel pin side The teeth are shallowly inserted into the positive slider. Even if the continuous chain tooth portion on the barrel pin side is basically not deformed, it is easy to become deformed when the positive slider and the reverse slider are adjacent to each other behind a pair of chain cloths. The ideal posture is symmetrical from front to back, so the latch can be easily inserted into a pair of sliding parts.

As shown in Figure 1, the reverse-opening zipper 1 of the first embodiment of the present invention is provided with: a pair of chain straps 2, which extend forward and backward and can be opened and closed opposite to the left and right; and a forward sliding member 3 and a reverse sliding member 4. They can move forward and backward along the opposite side edges of the pair of chain belts 2, and the moving direction of the forward sliding member 3 to open the pair of chain belts 2 is the forward direction, and the reverse sliding member 4 to open the pair of chain belts 2. The direction of movement is backward.

Regarding the chain belt 2, the so-called "opposite side edge part" refers to the right edge part of the left chain belt 2, and the left side edge part of the right chain belt 2.

The basic structure of a pair of chain belts 2 includes: a pair of chain cloths 5 extending front and back and facing left and right; a pair of chain tooth rows 6 fixed along the opposite side edges of the pair of chain cloths 5 respectively. , and can cooperatively engage and separate; the latch 7 and the cylinder pin 8 are respectively fixed on the rear ends of a pair of chain cloths 5; and a pair of stops 9 are respectively fixed on the front ends of a pair of chain cloths 5 department.

The direction is defined as follows with the zipper 1 placed on a flat surface. "Left-right direction" refers to the direction in which a pair of chain belts 2 face each other in the closed state. The so-called "left direction" refers to the left direction in Figure 1. The so-called "right direction" refers to the right direction in Figure 1. When describing the link belt 2 on the latch side, the left and right directions may be referred to as the "cylinder pin side" and the "reverse cylinder pin side". In this case, in this embodiment, since the left chain belt 2 is equipped with the latch 7 and the right chain belt 2 is equipped with the cylinder pin 8, the "cylinder pin side" refers to the right side and the "reverse cylinder pin side" refers to the left side. In addition, when describing the chain belt 2 on the cylinder pin side, the left and right directions may be referred to as the "pin side" and the "reverse pin side". In this case, in this embodiment, the "latching side" refers to the left side, and the "anti-latching side" refers to the right side. In addition, the "front and rear direction" refers to the direction in which the pair of chain belts 2 extend in a plan view, which is a straight line direction in FIG. 1 and is a direction orthogonal to the left and right direction. The so-called "front direction" refers to the upward direction in Figure 1. The so-called "rear direction" refers to the downward direction in Figure 1. "Up and down direction" means the direction orthogonal to the front and rear direction and the left and right direction. The "upper direction" in FIG. 1 refers to the direction toward the front side in the direction orthogonal to the paper surface. The "downward direction" in Figure 1 refers to the direction toward the inside in the direction orthogonal to the paper surface.

The chain cloth 5 is in the shape of a long strip at the front and back, and its thickness direction is set to the up and down direction. In addition, the chain cloth 5 is softer than the pair of chain tooth rows 6, latch pins 7 and barrel pins 8. Therefore, the portion of the chain cloth 5 other than the opposing side edge portions (the portion where the pair of sprocket rows 6, the latch pin 7 and the cylinder pin 8 are not fixed) can be freely deformed.

A pair of stops 9 defines the front-side boundary position in the movement range of the positive slide 3 by allowing the positive slide 3 to collide. The boundary position of the front side in the movement range of the reverse sliding member 4 is defined by the collision of the reverse sliding member 4 with the forward sliding member 3 .

As shown in FIG. 1 or FIG. 2 , the cylinder pin 8 is provided with: a cylinder pin body part 81 extending in the front-rear direction; and a detachment prevention part 82 whose rear end of the cylinder pin body part 81 extends toward the anti-bolt side and prevents The reverse sliding part 4 is disengaged. Furthermore, the cylinder pin 8 is fixed to the opposite side edge portion of the chain cloth 5 in a state of covering both its upper and lower surfaces and the left surface (the latch side surface). In addition, the cylinder pin 8 defines the boundary position of the rear side in the movement range of the reverse slide 4 by the collision of the reverse slide 4 with the anti-separation portion 82 . The boundary position of the rear side in the moving range of the forward slider 3 is defined by the collision of the forward slider 3 with the reverse slider 4 .

The latch 7 has a latch body 71 extending in the front-rear direction. In addition, the latch 7 is fixed to the opposite side edge portion of the chain cloth 5 in a state of covering both its upper and lower surfaces and the right surface (the barrel pin side surface). When the forward sliding part 3 and the reverse sliding part 4 are adjacent to each other at the rear ends of the pair of chain cloths 5 , the latch 7 can be inserted into and unplugged from the forward sliding part 3 and the reverse sliding part 4 . In this case, the reverse sliding member 4 is arranged at the boundary position on the rear side.

The latch pin 7 and the cylinder pin 8 each have a pair of positioning portions 73 and 83 positioned with each other. In this embodiment, the positioning portion 83 of the cylinder pin 8 is a protruding piece 83 protruding from the surface of the cylinder pin body 81 on the cylinder pin side, and the positioning portion 73 of the latch 7 is recessed in the surface of the cylinder pin side of the cylinder pin body 71 . And the receiving recess 73 receives the protruding piece 83.

As shown in FIG. 1 , the positive slider 3 can move forward and backward along the opposite side edges of the pair of chain belts 2 . Furthermore, the positive slider 3 is provided with: a slider body 31 that can guide the pair of sprocket rows 6 to engage and separate; and a pull tab 32 that is connected to the slider body 31 .

As shown in FIGS. 7 and 8 , the slider body 31 has the following components as its internal space: a sprocket passage 33 that runs through in the front-rear direction and allows a pair of sprocket rows 6 to pass through; and a pair of sprocket grooves 34 . The sprocket passage 33 is connected to the outside of the slider body 31 on the left and right sides and allows a pair of fasteners 5 to pass through. The sprocket element passage 33 is provided with: an meshing path 33a through which a pair of sprocket element rows 6 pass in an engaged state; and a pair of branch paths 33b that branch to the left and right as they go forward from the meshing path 33a, and A pair of sprocket tooth rows 6 are allowed to pass through in a state of being separated to the left and right.

The slider body 31 is provided with: a guide column 35 which is arranged between a pair of branch paths 33b in a state of extending up and down and guides a pair of sprocket rows 6 in a state of being separated to the left and right; and an upper wing plate 36 (see Fig. 1 ) and lower wing plates 37, which are equal to the upper and lower opposite directions of the guide column 35, and divide the upper and lower parts of the sprocket passage 33; about. Chain cloth grooves 34 are formed in the left and right side plates 38 in a state of penetrating in the front-rear direction. The portion of the left and right side plates 38 divided up and down by the chain cloth groove 34 is called a flange 38a. The flange 38a extends from the left and right edges of the upper wing plate 36 and the lower wing plate 37 in a direction approaching each other. In addition, the slider body 31 is provided with a raised portion 35a, which is raised from the upper and lower wings of the guide column 35 in a direction approaching each other from the upper wing plate 36 and the lower wing plate 37. The raised portion 35 a partially narrows the upper and lower intervals of the sprocket element passage 31 , and extends along the left and right sides of the guide column 35 and toward the rear of the guide column 35 . Furthermore, as shown in FIG. 1 , the slider body 31 is provided with a pull tab mounting portion 39 protruding from the upper surface side of the upper wing plate 36 . The handle 32 is connected to the handle attachment part 39 .

The reverse sliding part 4 is symmetrical to the forward sliding part 3 . Therefore, the structure of the reverse sliding member 4 will be described in a simplified manner. The reverse slider 4 includes a slider body 41 and a pull tab 42 . The slider body 41 has a sprocket element passage 43 and a pair of sprocket grooves 44 as its internal space. The sprocket element passage 43 includes a meshing passage 43a and a pair of branch passages 43b. The slider body 41 is provided with a guide column 45, an upper wing plate 46, a lower wing plate 47, left and right side plates 48, a raised portion 45a, and a pull tab mounting portion 49. Chain distribution grooves 44 are formed on the left and right side plates 48 . The portions of the left and right side plates 48 divided up and down by the chain cloth grooves 44 are called flanges 48a.

The pair of sprocket tooth rows 6 is composed of a plurality of sprocket teeth arranged in a row in the front-rear direction. Furthermore, as shown in FIG. 2 , each of the pair of sprocket element rows 6 includes a continuous sprocket element portion 61 in which a plurality of sprocket teeth 6 a are continuous in the front-rear direction.

The continuous sprocket portion 61 is a synthetic resin monofilament bent in three-dimensional directions (up and down, left and right, and front and back). The monofilament is formed by a unit of sprocket teeth 6a that meshes with the opposite monofilament and is continuous back and forth. Therefore, the continuous element portion 61 is composed of a plurality of elements 6a that are continuous in the front-rear direction. Furthermore, the sprocket teeth 6a of the continuous sprocket element portion 61 can be meshed with and separated from the sprocket teeth 6a of the opposite continuous sprocket element portion 61. Monofilament is coiled or zigzag-shaped. Moreover, the monofilament can also correspond to the curved shape and is also called a coil sprocket or a zigzag sprocket. In addition, as shown in FIG. 2 , in this embodiment, the monofilament is a coil sprocket and is wound around a core rope 5 a extending along a straight line in the front-rear direction. In addition, the sprocket 6a of the coil sprocket has, as is known, an upper leg 61a and a lower leg 61b, which are opposed to each other in the up-down direction; and an engaging head 61c, which connects the upper leg 61a and the lower leg 61b at the left and right ends. The end portions on the side of the opposing continuous sprocket portion 61 are joined and meshed with the sprocket teeth 6a of the opposing continuous sprocket portion 61; the upper engaging portion 61d is engaged with the meshing head 61c in the left and right ends. The end on the opposite side joins the upper leg 61a to the lower leg 61b of one of the front and rear sprocket teeth 6a; and the lower joining part 61d has the end on the opposite side to the engaging head 61c among the left and right ends. The lower leg portion 61b is joined to the upper leg portion 61a of the other front and rear sprocket 6a. Furthermore, the engaging head portion 61c extends vertically to engage the upper leg portion 61a with the lower leg portion 61b. In addition, the upper and lower middle portions of the engaging head portions 61c protrude forward and backward to be inserted between the upper leg portion 61a and the lower leg portion 61b of the facing continuous sprocket portion 61 of the sprocket element 6a to engage. Furthermore, the continuous sprocket element portion 61 is fixed to the opposite side edges of the fastener cloth 5 through sutures (not shown).

The pin row of sprockets 6 includes, in addition to the continuous sprocket portion 61 , an independent pin-side sprocket portion 10 between the continuous sprocket portion 61 and the pin 7 . In this embodiment, the independent sprocket element portion 10 on the latch side is composed of one sprocket element 11 fixed to the side edge portion of the fastener cloth 5 on the latch side, that is, the independent sprocket element 11 . The continuous sprocket tooth portion 61 is composed of sprocket teeth 6a that are continuous in the front-rear direction. The independent sprocket tooth portion 10 on the latch side is composed of one sprocket tooth 11. Therefore, the sprocket tooth row 6 on the latch side is composed of a plurality of sprocket teeth arranged in a row in the front-rear direction. It is composed of sprocket teeth (a plurality of sprocket teeth 6a and one sprocket element 11). Furthermore, since the independent fastener element 10 on the latch side is composed of one independent fastener element 11, the independent fastener element 11 is the independent fastener element 11 at the rear end of the independent fastener element 10 on the latch side.

The sprocket row 6 on the barrel pin side also has, in addition to the continuous sprocket portion 61 , an independent sprocket portion 20 on the barrel pin side between the continuous sprocket portion 61 on the barrel pin side and the barrel pin 8 . . In this embodiment, the independent sprocket tooth portion 20 on the barrel pin side is also composed of one sprocket tooth 21 fixed to the fastener cloth 5 on the barrel pin side, that is, the independent sprocket tooth 21 . The continuous sprocket tooth portion 61 is composed of sprocket teeth 6a that are continuous in the front and rear direction, and the independent sprocket tooth portion 20 on the cylinder pin side is composed of one sprocket tooth 21. Therefore, the sprocket tooth row 6 on the cylinder pin side is arranged in a row in the front and rear direction. It is composed of a plurality of sprocket teeth (a plurality of sprocket teeth 6a and one sprocket element 21). Furthermore, since the independent sprocket element portion 20 on the barrel pin side is composed of one independent sprocket element 21, the independent sprocket element 21 is the independent sprocket element 21 at the rear end of the independent sprocket element portion 20 on the barrel pin side.

The independent sprocket teeth 21 on the barrel pin side can be engaged and separated from the chain belt 2 on the latch side. More specifically, in this embodiment, they can be engaged and separated from the independent sprocket teeth 11 and the latch 7 on the latch side. Furthermore, the independent sprocket element 21 on the cylinder pin side is arranged at a distance from each of the continuous sprocket element 61 on the cylinder pin side and the cylinder pin 8 in the front-rear direction. between pins 8. The opposite side edges of the chain belt 2 on the barrel pin side tend to become a straight line due to the continuous sprocket teeth 61, independent sprocket teeth 21 and barrel pin 8 fixed on the chain cloth 5, but the front and rear of the independent sprocket teeth 21 The spaced portions respectively become easily deformable portions.

The independent sprocket teeth 11 on the latch side can be engaged with and separated from the chain belt 2 on the barrel pin side. More specifically, in this embodiment, they can be meshed with the continuous sprocket teeth 61 on the barrel pin side and the independent sprocket teeth on the barrel pin side. 21 Engagement and separation. Furthermore, the independent sprocket element 11 on the latch side is arranged between the continuous sprocket element 61 on the latch side and the latch 7 in a state of being spaced apart from each of the latch side continuous sprocket element 61 and the latch 7 in the front-rear direction. The opposite side edges of the chain belt 2 on the latch side tend to become a straight line because the continuous sprocket teeth 61, the independent sprocket teeth 11 and the latch 7 are fixed on the chain cloth 5, but the space between the front and rear of the independent sprocket teeth 11 They become easily deformable parts respectively.

The independent sprocket teeth 11 on the latch side and the independent sprocket teeth 21 on the barrel pin side are both made by injection molding synthetic resin directly onto the chain cloth 5 on the corresponding side, and both are longer than the continuous sprocket tooth portion 61 in the front and rear direction. One chain tooth is 6a long. Hereinafter, the structures of the independent sprocket teeth 11 on the latch side and the independent sprocket teeth 21 on the cylinder pin side will be described in detail.

The independent sprocket 11 on the latch side is provided with: a fixed part 12, which is fixed to the chain cloth 5 on the latch side; and an engaging part 13, which extends from the fixed part 12 to the chain cloth 5 on the barrel pin side, and is connected with the chain on the barrel pin side. With 2 mesh.

The fixing part 12 is fixed to the upper and lower surfaces of the fastener cloth 5 in a state of sandwiching the opposite side edges of the fastener cloth 5 from above and below. More specifically, the core rope 5a passing through the inside of the coil element as the continuous element portion 61 extends rearward with respect to the coil element, and is fixed to the opposite side of the chain cloth 5 by sutures (not shown). The side edge part. Moreover, the opposite side edge portions of the fastener cloth 5 and the core rope 5a overlapped thereon penetrate the fixing portion 12 in the front-rear direction and are accommodated in the latch 7 . In addition, in FIGS. 3 , 4 , and 6 , for the sake of convenience, the fastener cloth 5 and the core rope 5 a in the fixed part 12 are omitted, and instead, the portion where the fastener cloth 5 and the core rope 5 a are arranged is shown as a groove 12 s. The groove 12s is formed in the surface of the fixing part 12 on the anti-tube pin side in a state of penetrating in the front-rear direction. Furthermore, regarding the size of the groove 12 s in the up-down direction, the cylinder pin side is wider than the opposite cylinder pin side. It is known that this is to prevent the independent sprockets from being separated from the chain cloth 5 . Furthermore, the fixing part 12 has a substantially rectangular shape when viewed from the up and down direction.

As shown in FIG. 6 , among the upper surfaces of the fixed portion 12 , the upper surface 12 a on the barrel pin side is an inclined surface that becomes lower toward the barrel pin side. Among the upper surfaces of the fixed portion 12, the upper surface 12c on the anti-cylinder pin side is a slope that becomes lower toward the anti-cylinder pin side. The upper surface 12b of the intermediate portion in the left-right direction among the upper surfaces of the fixed portion 12 is the highest plane among the upper surfaces of the fixed portion 12 and is orthogonal to the up-down direction. Among the lower surfaces of the fixing part 12, the lower surface 12d on the barrel pin side is the lowest plane among the lower surfaces of the fixing part 12 and is orthogonal to the up-down direction. Among the lower surfaces of the fixed portion 12, the lower surface 12e on the anti-cylinder pin side is a slope that becomes higher toward the anti-cylinder pin side. The dimensions of the lowest part and the highest part of the fixing part 12 in the up-down direction are the thickness 12t of the fixing part 12.

The engaging portion 13 has: a neck portion 14 extending from the fixing portion 12 toward the fastener cloth 5 on the barrel pin side; a head portion 15 extending from the neck portion 14 toward the fastener cloth 5 on the barrel pin side and protruding forward and backward; and a shoulder. The portion 16 extends rearward from the rear surface of the neck 14 .

The neck portion 14 extends from the middle portion of the fixed portion 12 in the front-rear direction to the fastener 5 on the cylinder pin side (cylinder pin side). The upper surface 14a of the neck 14 is a plane that descends in a step-like manner from the highest part of the upper surface of the fixed portion 12 and is orthogonal to the up-down direction. Among the lower surfaces of the neck 14, the lower surface 14d on the fixing portion side (reverse cylinder pin side) is a plane orthogonal to the up-down direction and is a plane at the same height as the lower surface of the fixing portion 12 on the cylinder pin side. Among the lower surfaces of the neck 14, the lower surface 14e on the barrel pin side is a slope that becomes higher toward the barrel pin side. Furthermore, the vertical dimension of the lowest part and the highest part of the neck 14 is the thickness 14t of the neck 14. Furthermore, the thickness 14t of the neck portion 14 is thinner than the thickness 12t of the fixed portion 12. In this embodiment, it is the thickest part of the engaging portion 13, that is, the thickness 13t of the engaging portion 13.

The head 15 is provided with: a head body 151 extending from the neck 14 toward the barrel pin side; and a front convex portion 152 protruding from the head body 151 further forward than the neck 14 and being continuous with the barrel pin side. The sprocket teeth 6a at the rear end of the sprocket tooth portion 61 mesh; and the rear convex portion 153 protrudes from the head body 151 to the rear of the neck 14 and meshes with the independent sprocket teeth 21 on the cylinder pin side.

The upper surface 15a of the head 15 descends in a step-like manner compared with the highest part of the upper surface of the fixing part 12, and the lower surface 15d of the head 15 decreases in a step-like manner compared with the lowest part of the lower surface of the fixing part 12. Therefore, the thickness 15t of the head part 15 is thinner than the thickness 12t of the fixed part 12. The front upper surface 15b of the upper surface 15a of the head 15 is a slope that becomes lower toward the front. Regarding the lower surface 15d of the head 15, the lower surface 15e of the central portion of the lower surface on the cylinder pin side in the front-rear direction is formed as an incline that becomes higher toward the cylinder pin side, and the lower surface 15e on the cylinder pin side is formed in the front and rear directions. The front lower surface 15f and the rear lower surface 15h are planes that rise in a step-like manner from the central lower surface 15e (slope) in the front-rear direction and are orthogonal to the up-down direction at the same height. This front-rear direction front lower surface 15f is the lower surface of the front convex portion 152. The rear lower surface 15h in the front-rear direction is a part of the lower surface of the rear convex part 153 and a part of the lower surface of the head body 151 (the tail part on the cylinder pin side), and the front end 15k (front) of the lower surface 15h is A tilted state toward the cylinder pin side and forward.

In addition, the front convex portion 152, the neck portion 14, and the fixing portion 12 form a front recessed portion 17 covering the left and right sides of the front side of the neck portion 14. The front recess 17 is formed by a recess in the front surface of the independent sprocket 11 on the latch side. The front recess 17 opens forward and penetrates in the up-down direction. Furthermore, the sprocket teeth 6a at the rear end of the continuous sprocket element portion 61 on the barrel pin side mesh with the front recessed portion 17 and the front convex portion 152. More specifically, the rear portion of the engaging head portion 61 c of the rear end sprocket element 6 a of the continuous sprocket element portion 61 on the barrel pin side is accommodated in the front recessed portion 17 . The front convex portion 152 is inserted between the upper leg portion 61a and the lower leg portion 61b of the rear end sprocket 6a of the continuous sprocket tooth portion 61 on the cylinder pin side.

The rear convex portion 153 , the neck portion 14 and the fixing portion 12 form a rear concave portion 18 covering the left and right sides of the rear side of the neck portion 14 . The rear recessed portion 18 is formed by recessing the rear surface of the independent sprocket element 11 on the latch side. In addition, the rear recessed portion 18 opens rearward and upward, and is in a state where the lower portion is blocked by the shoulder portion 16 .

The shoulder 16 protrudes from the fixed part 12 , the neck 14 and the head 15 on the back side of the neck 14 in the front-rear direction. In addition, the shoulder portion 16 protrudes from the lower portions of the fixed portion 12, the neck portion 14, and the head portion 15 in the vertical direction. The upper surface 16a of the shoulder 16 is a plane orthogonal to the up-down direction, and the front lower surface 15f and the rear lower surface 15h of the lower surface 15 of the head 15 are at the same height. Furthermore, the rear end 16b of the shoulder 16 is in an inclined state toward the front as it goes toward the barrel pin side. Furthermore, the end 16 c of the shoulder 16 on the barrel pin side in the left-right direction is located on the surface of the rear convex portion 153 opposite to the barrel pin side.

As shown in Figure 1, the independent sprocket 21 on the barrel pin side has: a fixing part 22, which is fixed to the chain cloth 5 on the barrel pin side; and a meshing part 23, which extends from the fixed part 22 to the chain cloth 5 on the latch side. And it meshes with the chain belt 2 on the latch side.

The fixing portion 22 is fixed to the upper and lower surfaces of the fastener cloth 5 in a state of sandwiching the opposite side edge portions of the fastener cloth 5 from above and below. Furthermore, the opposite side edge portions of the fastener cloth 5 and the core rope 5a overlapped thereon penetrate the fixing portion 22 in the front-rear direction and are accommodated in the cylinder pin 8 . In FIGS. 3 to 5 , for the sake of convenience, the fastener 5 in the fixing part 22 is omitted, and the part where the fastener 5 is arranged is shown as a groove 22 s instead of the fastener 5 . The groove 22s is formed in the surface of the fixing part 22 on the anti-latch side so as to penetrate in the front-rear direction. Furthermore, regarding the size of the groove 22s in the up-down direction, the latch side is wider than the opposite latch side.

As shown in FIG. 5 , among the upper surfaces of the fixing portion 22 , the upper surface 22 a on the latch side is a slope that becomes lower toward the latch side. Among the upper surfaces of the fixed portion 22, the upper surface 22c on the anti-latch side is a slope that becomes lower toward the anti-latch side. The upper surface 22b of the intermediate portion in the left-right direction among the upper surfaces of the fixed portion 22 is the highest plane among the upper surfaces of the fixed portion 22 and is orthogonal to the up-down direction. The lower surface 22d of the fixed portion 22 is a plane orthogonal to the up-down direction. The size of the lowest part and the highest part of the fixing part 22 in the up-down direction is the thickness 22t of the fixing part 22. The right surface of the fixed portion 22 , that is, the surface on the anti-latch side, and the corner 22 h of the rear surface are formed as slopes that go forward toward the anti-latch side. As shown in FIG. 1 , this corner portion 22h faces the front surface of the barrel pin 8 . The distance between the corner portion 22h and the front surface of the cylinder pin 8 becomes wider toward the anti-pin side.

The engaging portion 23 is provided with: a neck portion 24 extending from the fixing portion 22 toward the fastener cloth 5 on the latch side; a head portion 25 extending from the neck portion 24 toward the fastener cloth 5 on the latch side and protruding forward and backward; and a pair of shoulders. Portions 26 and 27 extend forward and rearward from the front and rear surfaces of the neck 24.

The neck portion 24 extends from the rear portion of the fixing portion 22 to the fastener 5 on the latch side (the latch side). The upper surface 24a of the neck 24 is a plane that descends in a step-like manner from the highest part (plane) of the upper surface of the fixed portion 22 and is orthogonal to the up-down direction. The lower surface 24d of the neck 24 is a slope that becomes lower toward the latch side. Furthermore, the vertical dimension of the lowest part and the highest part of the neck 24 is the thickness 24t of the neck 24. Moreover, the thickness 24t of the neck portion 24 is thinner than the thickness 22t of the fixed portion 22. In this embodiment, it is the thickest part of the engaging portion 23, that is, the thickness 23t of the engaging portion 23.

The head 25 is provided with: a head body 251 extending from the neck 24 to the latch side; a front convex portion 252 protruding from the head body 251 further forward than the neck 24 and being accommodated in an independent chain on the latch side. There is a concave portion 18 behind the teeth 11; and a rear convex portion 253, which protrudes from the head body 251 toward the rear of the neck 24 and engages with the latch 7.

The upper surface 25a of the head 25 is stepped down compared to the highest part of the upper surface of the fixing part 22, and the lower surface 25d of the head 25 is stepped up compared to the lowest part of the lower surface of the fixing part. Moreover, in this embodiment, the thickness 25t of the head part 25 is thinner than the thickness 24t of the neck part 24, and is thinner than the thickness 22t of the fixed part 22. Among the upper surfaces 25a of the head 25, the upper surface 25b on the neck side (the latch side) is an inclined surface that becomes lower toward the latch side. Regarding the lower surface 25d of the head 25, the lower surface 25e of the center portion of the latch side lower surface in the front-rear direction is formed as a slope that becomes higher toward the latch side, and the lower surface 25e of the latch side lower surface in the front-rear direction is formed as a slope. The lower surface 25f is a plane that rises in a step-like manner from the lower surface 25e (slope) of the central portion in the front-rear direction and is orthogonal to the up-down direction. The lower surface 25f of the front part in the front-rear direction is a part of the lower surface of the front convex part 253 and the lower surface of the head body 251 (the tail part on the latch side), and the rear end 25k (rear edge) of the lower surface 25f is toward the latch side. And tilted towards the rear.

Furthermore, as shown in Figure 1, the distance W between the front end of the head 25 and the front end of the meshing head 61c of the rear end sprocket 6a in the continuous sprocket portion 61 on the barrel pin side is larger than one sprocket 6a (equivalent to the core winding rope). 5a circle) the dimension P width in the front and rear direction.

Furthermore, as shown in FIG. 5 , the front convex portion 252 , the neck portion 24 and the fixing portion 22 form a front recessed portion 28 covering the left and right sides of the front side of the neck portion 24 . The front recess 28 is formed by a recess in the front surface of the independent sprocket 21 on the barrel pin side. The front recessed portion 28 opens forward and upward, and is blocked below by the front shoulder portion 26 . Furthermore, the independent sprocket element 11 on the latch side engages with the front convex portion 252 and the front recessed portion 28 (see FIG. 2 ). In more detail, the rear protrusion 153 of the independent sprocket element 11 on the latch side is received in the front recess 28 of the independent sprocket element 21 on the barrel pin side, and the front protrusion 252 of the independent sprocket element 21 on the barrel pin side is accommodated in the independent chain on the latch side. The tooth 11 is followed by a recess 18 . Furthermore, the following state is achieved: the front convex portion 252 of the independent sprocket element 21 on the cylinder pin side faces the shoulder 16 of the independent sprocket element 11 on the latch side up and down, and the rear convex portion 153 of the independent sprocket element 11 on the latch side faces the shoulder portion 16 of the independent sprocket element 11 on the latch side. The shoulder 26 on the front side of the independent sprocket 21 faces up and down.

As shown in FIG. 5 , the rear convex portion 253 of the independent sprocket 21 on the barrel pin side, the neck portion 24 and the fixing portion 22 form left and right rear recessed portions 29 covering the rear side of the neck portion 24 . The rear recess 29 is formed by a recess in the rear surface of the independent sprocket 21 on the barrel pin side. The rear recessed portion 29 opens rearward and upward, and is in a state where the lower portion is blocked by the rear shoulder portion 27 . Furthermore, the front part of the latch 7 meshes with the rear concave part 29 and the rear convex part 253 of the independent sprocket 21 on the cylinder pin side (refer to FIG. 2).

The front surface of the latch 7 (the latch body 71 ) is recessed to form a front recess 74 for accommodating the rear convex portion 253 of the independent sprocket 21 on the cylinder pin side. Furthermore, the corner 75 between the right surface (surface on the cylinder pin side) and the front surface of the latch 7 is accommodated in the recess 29 behind the independent sprocket 21 on the cylinder pin side. A corner recessed portion 76 for accommodating the shoulder 27 of the rear side of the independent sprocket 21 on the barrel pin side is formed at the corner between the front surface and the right surface (cylinder pin side surface) of the corner portion 75 . The corner recess 76 accommodates the shoulder 27 on the rear side of the independent sprocket 21 on the barrel pin side in a state that covers it from top to bottom.

The front shoulder 26 is on the front side of the neck 24 in the front-rear direction and protrudes from the fixed part 22, the neck 24 and the head 25. In addition, the front shoulder portion 26 protrudes from the rear side of the front end of the fixed portion 22 . In addition, the front shoulder portion 26 protrudes from the lower portions of the fixed portion 22, the neck portion 24, and the head portion 25 in the vertical direction. Furthermore, the front surface 26c of the shoulder 26 on the front side is an inclined surface toward the rear as it goes toward the latch side.

The rear shoulder 27 is on the rear side of the neck 24 in the front-rear direction, and protrudes from the fixed part 22 and the neck 24 . In addition, the rear end of the rear shoulder portion 27 is located at the same position as the rear end of the fixed portion 22 . In addition, the shoulder 27 on the rear side protrudes from the lower part of the neck 24 in the up-down direction. Furthermore, the upper surface 27a of the shoulder 27 on the rear side and the upper surface 26a of the shoulder on the front side are planes at the same height as the lower surface 25d of the head 25 in the front-rear direction and the front lower surface 25f.

As shown in FIGS. 7 and 8 , in the reversing zipper 1 of the first embodiment, when the front sliding member 3 and the reverse sliding member 4 are adjacent to each other at the rear ends of the pair of fasteners 5 , the latch 7 can be inserted into and removed from the zipper 1 . Positive sliding part 3 and reverse sliding part 4. In a state where insertion and extraction are possible, the independent sprocket teeth 21 on the barrel pin side are accommodated inside the forward sliding member 3, and the barrel pin 8 spans both the forward sliding member 3 and the reverse sliding member 4 and is accommodated inside them. . In addition, in a state where this insertion and extraction is possible, the rear end of the continuous sprocket portion 61 on the barrel pin side is located closer to the front side than the rear end of the guide post 35 of the alignment slider 3 .

Furthermore, the reverse-opening slide fastener 1 of the first embodiment is provided with an independent fastener element 20 on the barrel pin side, and the independent fastener element 20 on the barrel pin side is positioned relative to the continuous fastener element 61 on the barrel pin side and each of the barrel pin 8 are arranged at a predetermined distance in the front-rear direction, so the portion between the independent sprocket element 20 on the barrel pin side and the barrel pin 8 and the portion between the continuous sprocket portion 61 and the independent sprocket portion 61 pass through the front-rear direction. Each of them has this gap and becomes soft and becomes an easily deformable portion. Furthermore, in the reverse-opening zipper 1 of the first embodiment, the chain belt 2 on the barrel pin side has sufficient spacing and an easily deformable portion formed between the continuous sprocket element portion 61 on the barrel pin side and the barrel pin 8. The softness of the opposite side edges is improved. Therefore, when the latch 7 is inserted into the forward slider 3 and the reverse slider 4, the independent sprocket tooth portion 20 and the continuous sprocket tooth portion 61 on the barrel pin side are respectively inclined relative to the linear direction of the barrel pin 8, and the forward slider is opposite to The slope of the reverse sliding member 4 becomes smaller. Moreover, in the state where the forward slider 3 and the reverse slider 4 are adjacent to each other at the rear ends of the pair of fasteners 5, they can easily become an ideal posture of front-rear symmetry, so it is easy to insert the latch 7.

Furthermore, in the reverse slide fastener 1 of the first embodiment, when the latch 7 is inserted into and removed from the forward slider 3 and the reverse slider 4, the rear end of the continuous sprocket portion 61 on the cylinder pin side is located behind the guide post 35. The end is closer to the front, so for example, the rear end of the continuous sprocket portion 61 on the barrel pin side is the same as the rear end of the guide column 35, or the rear end of the continuous sprocket portion 61 on the barrel pin side is located further than the rear end of the guide column 35. On the rear side, the continuous sprocket tooth portion 61 on the barrel pin side enters the forward sliding member 3 relatively shallowly. Even if the continuous sprocket tooth portion 61 on the barrel pin side is basically not deformed, it is still between the forward sliding member 3 and the reverse sliding member 4. In a state where the rear ends of a pair of fasteners 5 are adjacent to each other front and back, it is easy to achieve an ideal posture of front and back symmetry, so the latch 7 is easy to insert into the pair of sliders.

Furthermore, in the reverse opening zipper 1 of the first embodiment, the fixing portion 22 of the independent sprocket element 21 on the barrel pin side extends further forward than the head portion 25. Therefore, for example, the position of the front end of the fixing portion 22 is different from the position of the front end of the fixing portion 22. The front end of the head 25 is aligned with the chain belt 2 on the barrel pin side of the independent sprocket tooth 21 on the barrel pin side, and the size between the continuous sprocket tooth portion 61 on the barrel pin side and the independent sprocket tooth portion 20 on the barrel pin side becomes narrower. The forward sliding part 3 and the reverse sliding part 4 are not easy to pull out.

Furthermore, in the reverse-opening zipper 1 of the first embodiment, the distance W between the independent sprocket element 21 on the barrel pin side and the continuous sprocket element portion 61 is at the head 25 in the front-rear direction of one sprocket element 6a of the continuous sprocket element portion 61 The dimension P is wide. Therefore, compared to a chain belt on the barrel pin side configured such that the distance W is the same as the dimension P, the distance W is wider than the dimension P, so that the head 25 is guided without causing collision. In the case of the post 35, the link belt 2 on the cylinder pin side is easily deformed.

Furthermore, in the reverse opening zipper of the first embodiment, regarding the independent sprocket element 21 on the barrel pin side, the corner 22h of the right surface (the anti-pin side surface) and the rear surface of the fixing part 22 is set so as to move toward the reverse pin side. The inclined surface facing forward sideways makes the distance between the fixed part 22 and the barrel pin 8 wider as it goes toward the anti-bolt side. Therefore, when the latch 7 is inserted, even if the independent sprocket teeth 21 face each other in the positive slider 3 When the barrel pin is tilted in a straight line, the corner portion 22h is less likely to collide with the flange 38a of the positive slider 3 and is less likely to contact the front surface of the barrel pin 8, making it easier to insert the latch 7.

Furthermore, the reverse zipper 1 of the first embodiment is provided with an independent fastener element 10 on the latch side, and the independent fasteners 11 of the independent fastener element 10 on the latch side are arranged relative to the continuous fastener parts 61 on the latch side and each of the latch 7 They are arranged spaced apart in the front and rear direction, so the portion between the independent sprocket element 10 on the latch side and the latch 7 and the portion between the continuous sprocket element 61 on the latch side and the independent sprocket element 11 on the latch side are separated by Specific intervals in the front and rear directions become easily deformable portions. Moreover, the reverse opening zipper 1 of the first embodiment has sufficient spacing and an easily deformable portion formed between the continuous sprocket element portion 61 on the latch side and the latch 7, and the opposite side edge portions of the chain belt 2 on the latch side The softness is improved. Therefore, when the latch 7 is inserted into the forward sliding member 3 and the reverse sliding member 4, the independent sprocket tooth portion 10 and the continuous sprocket tooth portion 61 on the latch side are respectively inclined relative to the straight line direction of the latch 7, and are in the forward sliding member 3 and the reverse sliding member. 4. In the state where the rear ends of the pair of chain cloths 5 are adjacent to each other front and back, it is easy to achieve an ideal posture of front and rear symmetry, so it is easy to insert the latch 7.

Furthermore, in the reverse opening zipper 1 of the first embodiment, the independent sprocket teeth 11 of the independent sprocket element portion 10 on the latch side can be engaged with and separated from the chain belt 2 on the barrel pin side. More specifically, the independent sprocket teeth 11 on the barrel pin side can be engaged and separated from each other. The continuous sprocket teeth 61 and the independent sprocket teeth 21 on the cylinder pin side are engaged and separated, so the connection strength when closing the pair of chain belts 2 is improved.

Furthermore, in the reverse opening zipper 1 of the first embodiment, the independent sprocket teeth 21 on the pin side can be engaged with and separated from the chain belt 2 on the latch side, and more specifically, can be engaged with and separated from the independent sprocket teeth 11 and the latch 7 on the latch side. Engagement and separation, so the connection strength when closing a pair of chain belts 2 is improved. Furthermore, regarding the head 25 of the independent sprocket tooth 21 on the barrel pin side, its front part (front convex part 252) can engage and separate from the independent sprocket tooth 11 on the latch side, and its rear part (rear convex part 253) can engage with and separate from the latch side. 7 Engagement and separation.

Furthermore, regarding the size of the reverse zipper 1 of the first embodiment corresponding to the thickness direction of the fastener fabric 5, the thickness 13t of the engaging portion 13 of the independent fastener element 11 on the latch side is thinner than the thickness 12t of the fixed portion 12, and the barrel pin In the independent sprocket 21 on the side, the thickness 23t of the meshing part 23 is thinner than the thickness 22t of the fixed part 22. Therefore, when the forward sliding part 3 or the reverse sliding part 4 is moved forward and backward, the inside of the forward sliding part 3 and the reverse sliding part 4 The upper and lower raised portions 35a and 45a are less likely to collide with the fixing portions 12 and 22.

The present invention is not limited to the above-described embodiment. For example, in this embodiment, the independent sprocket element portion 20 on the barrel pin side is composed of one independent sprocket element 21, but the present invention is not limited to this, and may also be composed of a plurality of independent sprocket teeth 21. In this case, a plurality of independent sprocket teeth are arranged at intervals in the front-rear direction and fixed to the chain cloth 5 . Moreover, in this embodiment, the independent sprocket element part 10 on the latch side is also composed of one independent sprocket element 11, but the present invention is not limited to this, and may also be composed of a plurality of independent sprocket teeth 11. In this case, a plurality of independent sprocket teeth 11 are also arranged at intervals in the front-rear direction and fixed to the chain cloth 5 .

1:Reverse zipper 2:Chain belt 3: Positive sliding parts 4: Reverse sliding parts 5:Chain cloth 5a: core rope 6:Sprocket row 6a: sprocket teeth 7:Latch 8: barrel pin 9: Stop 10: Independent sprocket teeth on the latch side 11: Independent sprocket teeth (sprocket teeth) on the latch side 12: Fixed part 12a: Upper surface 12b: Upper surface 12c: Upper surface 12d: Lower surface 12e: Lower surface 12s: slot 12t:Thickness 13:Meshing part 13t:Thickness 14: Neck 14a: Upper surface 14d: Lower surface 14e: Lower surface 14t:Thickness 15:Head 15a: Upper surface 15b: Upper surface 15d: Lower surface 15e: Lower surface 15f: Lower surface 15h: Lower surface 15k:Front end 15t:Thickness 16:shoulder 16a: Upper surface 16b: Backend 16c: end of barrel pin side 17: Front concave part 18: Rear concave part 20: Independent sprocket teeth on the cylinder pin side 21: Independent sprocket teeth (sprocket teeth) on the cylinder pin side 22: Fixed part 22a: Upper surface 22b: Upper surface 22c: Upper surface 22d: Lower surface 22h: Corner 22s: slot 22t:Thickness 23:Meshing part 23t:Thickness 24:Neck 24a: Upper surface 24d: Lower surface 24t:Thickness 25:Head 25a: Upper surface 25b: Upper surface 25d: Lower surface 25e: Lower surface 25f: Lower surface 25k: backend 25t:Thickness 26:Shoulder 26a: Upper surface 26c: Front surface 27:Shoulder 27a: Upper surface 28: Front concave part 29: Rear concave part 31: Slider body 32: pull tab 33:Sprocket tooth passage 33a:Meshing road 33b:branch road 34:Chain cloth slot 35:Guide column 35a: bulge 36:Upper wing panel 37:Lower wing panel 38:Side panel 38a:Flange 39: Pull tab installation part 41: Slider body 42: pull tab 43:Sprocket tooth passage 43a:Meshing road 43b:branch road 44:Chain cloth slot 45:Guide column 45a: bulge 46:Upper wing panel 47:Lower wing panel 48:Side panel 48a:Flange 49: Pull tab installation part 61: Continuous sprocket tooth part 61a: Upper foot 61b:Lower feet 61c: Engagement head 61d:Joint 71:Latch body 73: Positioning part (protruding piece) 74: Front concave part 75: Corner 76: Corner recess 81:Latch body 82: Anti-hair loss department 83: Positioning part (containing recess) 151: Head body 152: lordosis 153:kyphosis 251: Head body 252: lordosis 253:kyphosis P: The front and rear dimensions of the sprocket teeth W: interval

FIG. 1 is a plan view showing the entire reverse opening zipper according to the first embodiment of the present invention. FIG. 2 is a perspective view showing a main part of a pair of fasteners of the reverse zipper according to the first embodiment. FIG. 3 is a perspective view showing a state in which the independent sprocket elements on the latch side and the independent sprocket elements on the barrel pin side are viewed from the rear side and the upper side. FIG. 4 is a perspective view showing a state in which the independent sprocket elements on the latch side and the independent sprocket elements on the barrel pin side are viewed from the rear side and the lower side. Figures 5 (A) to (D) are a top view, a front view, a left view, and a bottom view showing the independent sprocket teeth on the cylinder pin side. 6 (A) to (D) are a top view, a front view, a left view, and a bottom view showing the independent sprockets on the latch side. Fig. 7 is a cross-sectional view showing a state in which the latch is deeply inserted into the forward sliding member and the reverse sliding member. FIG. 8 is a cross-sectional view showing the state in which the latch is initially inserted into the forward sliding member and the reverse sliding member.

1:Reverse zipper

2:Chain belt

3: Positive sliding parts

4: Reverse sliding parts

5:Chain cloth

5a: core rope

6:Sprocket row

6a: sprocket teeth

7:Latch

8: barrel pin

9: Stop

10: Independent sprocket teeth on the latch side

11: Independent sprocket teeth (sprocket teeth) on the latch side

12: Fixed part

13:Meshing part

17: Front concave part

20: Independent sprocket teeth on the barrel pin side

21: Independent sprocket teeth (sprocket teeth) on the barrel pin side

22: Fixed part

22h: Corner

23:Meshing part

31: Slider body

32: pull tab

36:Upper wing panel

39: Pull tab installation part

41: Slider body

42: pull tab

46:Upper wing panel

49: Pull tab installation part

61: Continuous sprocket tooth part

61a: Upper foot

61c: Engagement head

71:Latch body

73: Positioning part (protruding piece)

81:Latch body

83: Positioning part (containing recess)

152: lordosis

P: The front and rear dimensions of the sprocket teeth

W: interval

Claims (8)

A reverse opening zipper (1), which has: A pair of chain straps (2), which extend front and back and can be opened and closed facing left and right; The positive sliding part (3) and the reverse sliding part (4) can move forward and backward along the opposite side edges of the pair of chain belts (2), and the positive sliding part (3) opens the pair of the above-mentioned chains. The moving direction of the belt (2) is the forward direction, and the moving direction of the reverse sliding member (4) when opening a pair of the above-mentioned chain belts (2) is the rear direction; the characteristics of the above-mentioned reverse opening zipper (1) are: A pair of the above chain belts (2) has: A pair of chain cloths (5), which extend front and back and face each other left and right; A pair of chain tooth rows (6), which are composed of a plurality of chain teeth (6a, 11, 21) arranged in a row from front to back, and are respectively fixed along the opposite side edges of a pair of the above-mentioned chain cloths (5) , and can engage and separate cooperatively; The latch (7) and the cylinder pin (8) are respectively fixed to the rear ends of a pair of the above-mentioned chain cloths (5). (5) When the rear ends are adjacent to each other front and back, the above-mentioned latch (7) can be inserted into and removed from the above-mentioned forward sliding part (3) and the above-mentioned reverse sliding part (4); A pair of the above-mentioned sprocket element rows (6) has a continuous sprocket element section (61) formed by a plurality of the above-mentioned sprocket teeth (6a). The above-mentioned sprocket element row (6) on the barrel pin side, in addition to the above-mentioned continuous sprocket element section (61), also has an independent sprocket element section (20) on the barrel pin side that can engage and separate from the above-mentioned chain belt (2) on the latch side. , The above-mentioned independent sprocket teeth part (20) on the cylinder pin side is composed of one or a plurality of the above-mentioned sprocket teeth (21), that is, independent sprocket teeth (21), of the above-mentioned chain cloth (5) fixed on the cylinder pin side, The above-mentioned independent sprocket teeth (21) at the rear end are accommodated inside the above-mentioned forward sliding part (3) in a state where the above-mentioned latch (7) can be inserted into and removed from the above-mentioned forward sliding part (3) and the above-mentioned reverse sliding part (4), The independent sprocket element portion (20) is arranged on the continuous sprocket element on the barrel pin side in a state of being spaced back and forth from the continuous sprocket element portion (61) and the barrel pin (8) on the barrel pin side. between the part (61) and the above-mentioned barrel pin (8). Such as the reverse opening zipper (1) of claim 1, in which the above-mentioned chain element row (6) on the latch side, in addition to the above-mentioned continuous sprocket element section (61) on the latch side, also has the above-mentioned chain belt (2) on the barrel pin side. ) The independent sprocket tooth portion (10) on the latch side of the engagement and separation, The above-mentioned independent sprocket teeth part (10) on the latch side is composed of one or a plurality of the above-mentioned sprocket teeth (11), that is, independent sprocket teeth (11), of the above-mentioned chain cloth (5) fixed on the latch side, The above-mentioned independent sprocket teeth (11) at the rear end of the latch side are accommodated in the above-mentioned forward sliding part (3) in a state where the above-mentioned latch (7) can be inserted into and removed from the above-mentioned forward sliding part (3) and the above-mentioned reverse sliding part (4). internal, The independent sprocket element portion (10) on the latch side is arranged on the continuous sprocket element on the latch side in a state of being spaced in the front and back with respect to the continuous sprocket element portion (61) and the latch pin (7) on the latch side. between the part (61) and the above-mentioned latch (7). For example, in the reverse-opening zipper (1) of claim 2, the independent sprocket teeth (11) at the rear end of the latch side can be connected with the continuous sprocket teeth (61) on the barrel pin side and the independent sprocket teeth (21) on the barrel pin side. ) engagement and disengagement. The reverse opening zipper (1) of any one of claims 1 to 3, wherein the above-mentioned independent sprocket teeth (21) on the cylinder pin side are provided with: a fixing part (22), which is fixed to the above-mentioned chain cloth (5) on the cylinder pin side. ); and the engaging portion (23), which extends from the above-mentioned fixed portion (22) to the above-mentioned chain cloth (5) on the latch side, and engages with the above-mentioned chain belt (2) on the latch side; and Regarding the dimensions corresponding to the thickness direction of the fastener cloth (5), the thickness (23t) of the above-mentioned engaging portion (23) is thinner than the thickness (22t) of the above-mentioned fixing portion (22). The reverse-open zipper (1) of claim 4, wherein the engaging portion (23) of the independent sprocket teeth (21) on the cylinder pin side is provided with: a neck portion (24), which extends from the fixing portion (22) to the latch side. The above-mentioned chain cloth (5) extends; and the head (25) extends from the above-mentioned neck (24) to the above-mentioned chain cloth (5) on the latch side, and protrudes forward and backward; and The fixed portion (22) of the independent sprocket tooth (21) on the cylinder pin side extends further forward than the head portion (25). The reverse-open zipper (1) of claim 4, wherein the engaging portion (23) of the independent sprocket teeth (21) on the cylinder pin side is provided with: a neck portion (24), which extends from the fixing portion (22) to the latch side. The above-mentioned chain cloth (5) extends; and the head (25) extends from the above-mentioned neck (24) to the above-mentioned chain cloth (5) on the latch side and protrudes forward and backward; and The above-mentioned head (25) can be engaged with and separated from the above-mentioned chain belt (2) on the latch side. For example, the reverse-opening zipper (1) of any one of claims 1 to 3, wherein the independent sprocket teeth (21) on the barrel pin side are injection molded into the above-mentioned fastener cloth (5), The above-mentioned continuous sprocket tooth portion (61) is a coil-shaped or zigzag-shaped monofilament bent in a three-dimensional direction. A reverse opening zipper (1), which has: A pair of chain straps (2), which extend forward and backward and can be opened and closed opposite to the left and right; and The positive sliding part (3) and the reverse sliding part (4) can move forward and backward along the opposite side edges of the pair of chain belts (2), and the positive sliding part (3) opens the pair of the above-mentioned chains. The moving direction of the belt (2) is the forward direction, and the moving direction of the reverse sliding member (4) when opening a pair of the above-mentioned chain belts (2) is the rear direction; the characteristics of the above-mentioned reverse opening zipper (1) are: A pair of the above chain belts (2) has: A pair of chain cloths (5), which extend front and back and face each other left and right; A pair of sprocket tooth rows (6), which are composed of a plurality of sprocket teeth (6a) arranged in a row front and back, and are respectively fixed along the opposite side edges of a pair of above-mentioned chain cloths (5), and can cooperate engaging and disengaging; and The latch (7) and the cylinder pin (8) are respectively fixed to the rear ends of a pair of the above-mentioned chain cloths (5). (5) When the rear ends are adjacent to each other, the above-mentioned latch (7) can be inserted into and removed from the above-mentioned forward sliding part (3) and the above-mentioned reverse sliding part (4); and A pair of the above-mentioned sprocket element rows (6) has a continuous sprocket element portion (61) formed by a plurality of sprocket teeth (6a) that are connected back and forth. The above-mentioned positive slider (3) is provided with a guide post (35) that guides the pair of the above-mentioned continuous sprocket portions (61) in a state of being separated to the left and right, When the above-mentioned latch (7) is inserted into and removed from the above-mentioned forward sliding part (3) and the above-mentioned reverse sliding part (4), the rear end of the above-mentioned continuous sprocket portion (61) on the barrel pin side is located farther than the above-mentioned guide post (35). ) the rear end is closer to the front.