Slide fastener and method for manufacturing stringer for slide fastener

Abstract

In this slide fastener, among a pair of element rows (5L), an element row (5L) in which a claw tip (21) of a stop claw (12) comes into contact is configured from a plurality of types of elements (5), and is classified into an adjacent group (C1), which is a set of elements adjacent to an opener (6) from the number of openers to the nth (an integer of 1 or more), and a distant group (C2), which is a set of elements after the (n + 1) th from the opener. When a pulling force is applied from the slider (3) to one of the element rows, the elements constituting the distant group are provided with strong elements (8) of the type that strengthens the impact compared to the elements constituting the adjacent group. All the elements constituting the adjacent groups are weak elements (9) of a type that reduces impact compared to the strong elements. When a pulling force is applied under the condition that the puller is not completely pulled down, the impact applied to the weak zipper teeth and the stopping claw is weaker than the impact applied to the strong zipper teeth and the stopping claw.

Description

Technical Field

[0001] The present invention relates to a slide fastener including a pair of fastener tapes and a slider capable of opening and closing the pair of fastener tapes and stopping the position relative to the pair of fastener tapes, and a method for manufacturing a fastener tape of the slide fastener. Background Art

[0002] Patent Document 1 discloses a zipper including: a pair of tapes extending in the front-rear direction and facing each other in the left-right direction; a pair of fastener element rows consisting of a plurality of fastener elements fixed along the opposite side edges of the pair of tapes; and a slider for engaging and disengaging the pair of fastener element rows. The slider includes a stop claw that contacts the fastener element in order to stop the position relative to the pair of fastener element rows.

[0003] In addition, Patent Document 2 discloses a zipper having an opening member called a separation insert in addition to a pair of tapes, a pair of chain element rows, and a slider. The combination of the chain element rows, the opening member, and the tape is called a chain tape. By the way, moving the slider toward the opening member to open (separate) the pair of chain element rows is called pulling the slider down, and moving the slider to the opposite side of the opening member to close (engage) the pair of chain element rows is called pulling the slider up.

[0004] The separable insert as an opening tool disclosed in Patent Document 2 is composed of a left opening tool piece called a plunger and a right opening tool piece integrated with a seat rod and a member called a socket.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2016-202761

[0008] Patent Document 2: International Publication No. 2013 / 051149 Summary of the invention

[0009] However, if the zipper is in a state where the pair of chain teeth are engaged and the slider is completely pulled down, in other words, the slider is in contact with the opening piece, and a pulling force (hereinafter sometimes referred to as "pulling force") is applied from the slider to one of the chain teeth, the opening piece on one side will fall off the slider together with the chain teeth on one side, and the pair of chain teeth will be completely separated.

[0010] On the other hand, when the zipper is moved from a state where a pair of chain element rows are meshed to a state where the slider is pulled down halfway, in other words, when the slider and the opening tool are separated, the stop claw contacts the chain element, thereby stopping the slider relative to the pair of chain element rows.

[0011] However, sometimes a pulling force is applied when the slider is separated from the opening member. A typical example of applying a pulling force is described in the case of attaching a zipper to a jacket. A typical example of applying a pulling force is as follows: the user of the jacket thinks that the slider has been completely pulled down, but in fact the slider is separated from the opening member. Despite this, the user still wants to take off the jacket and operates a pair of chain teeth extending in a form of two branches from the slider in a manner to widen the gap between the pair of chain teeth.

[0012] However, in the zippers disclosed in the above-mentioned patent documents 1 and 2, all the fasteners constituting a pair of fastener teeth are of the same type, and the shapes of all the fastener teeth are the same. Therefore, when the slider is pulled down halfway and the slider is separated from the opening member, the stop claw contacts any fastener teeth in the same state regardless of the position of the slider.

[0013] Thus, in the zippers disclosed in Patent Documents 1 and 2, if a pulling force is applied as in the typical example described above, a force is applied to the slider to move toward the opening member, and the chain teeth and the stop claws touch each other inside the slider. Furthermore, if the pulling force is large, the impact between the chain teeth and the stop claws becomes stronger (larger) inside the slider, and sometimes the stop claws try to pass over the chain teeth, causing the chain teeth and the stop claws to be damaged, or not only the chain teeth and the stop claws are damaged, but the chain teeth also fall off the belt.

[0014] In addition, the situation where there is a possibility of applying a pulling force is not limited to typical examples, and it can be imagined that a pair of chain teeth are engaged halfway, in other words, the slider is pulled down to a certain extent relative to a pair of chain teeth in a fully engaged state. In the situation where there is a possibility of applying a pulling force, it is desirable to weaken (reduce) the impact of the chain teeth and the stop claw that touch each other in the slider as much as possible. Hereinafter, this impact is sometimes referred to as the "slider locking strength." The reason for this name is that the slider is stopped (locked) relative to the position of the pair of chain teeth by the stop claw.

[0015] On the other hand, when a pair of fastener teeth are fully engaged, it can be said that there is usually no possibility of applying a pulling force. In this situation, it is desired to make the slider locking strength stronger (larger) than the slider locking strength in the situation where there is a possibility of applying a pulling force.

[0016] The present invention is completed in consideration of the above-mentioned actual situation, and its purpose is to weaken (reduce) the slider locking strength as much as possible when a pulling force is applied when the slider is pulled down halfway (the slider is separated from the opening member) in a state where a pair of chain teeth are in meshing state. In addition, the present invention aims to make the chain teeth and the like as difficult to be damaged as possible by reducing the slider locking strength.

[0017] The slide fastener of the present invention comprises a pair of chain tapes and a slider, wherein the slider opens and closes the pair of chain tapes and can stop the position relative to the pair of chain tapes. The pair of chain tapes comprises: a pair of tapes extending in the front-to-back direction and facing each other in the left-to-right direction; a pair of chain element rows consisting of a plurality of chain elements fixed along the opposite side edges of the pair of tapes; and an opening member, which comprises a pair of opening member pieces respectively fixed to one end portion in the front-to-back direction of the pair of tapes, and can insert and remove one opening member piece together with one chain element row relative to the slider. The slider comprises: a slider body, which engages and disengages the pair of chain element rows; and a stop claw, which stops the position relative to the pair of chain element rows, and the claw tip as one end portion of the stop claw descends inside the slider body and contacts the chain element. At least one chain element row in the chain element rows contacted by the claw tip is composed of a plurality of types of chain elements. In addition, the chain teeth are classified into a proximity group and a distance group. The proximity group is a collection of chain teeth adjacent to the opening member and from the number of opening members to the nth, and the distance group is a collection of chain teeth from the opening member onwards from the n+1th. Here, n is an integer greater than 1. For the impact applied to the chain teeth and the stop claws that touch in the slider when a pulling force is applied to the chain teeth of one side from the slider, the chain teeth constituting the distance group have strong chain teeth of a type that strengthens the impact compared to the chain teeth constituting the proximity group. All the chain teeth constituting the proximity group are weak chain teeth of a type that weakens the impact compared to the strong chain teeth.

[0018] The chain elements constituting the distance group may be composed of only strong chain elements or may be composed of strong chain elements and weak chain elements. For this reason, the chain elements constituting the distance group are provided with strong chain elements. On the other hand, all the chain elements constituting the proximity group are weak chain elements. Therefore, for example, in the case where all the chain elements constituting the chain element row are configured such that the chain elements from the number of opened pieces to the nth are configured as weak chain elements, the n+1th chain element is configured as a strong chain element, the chain elements from the n+2th to a certain number are configured as weak chain elements, and the chain elements after the certain number are configured as strong chain elements, the set of chain elements from the number of opened pieces to the nth is the proximity group, and the set of chain elements after the n+1th is the distance group.

[0019] "At least one of the chain tooth rows that the claw tip contacts" includes the following situations: 1) the chain tooth rows that the claw tip contacts are a pair of chain tooth rows and the above at least one chain tooth row is all (a pair of) chain tooth rows; 2) the chain tooth rows that the claw tip contacts are a pair of chain tooth rows and the above at least one chain tooth row is only one chain tooth row in the pair; 3) the chain tooth row that the claw tip contacts is only one chain tooth row in a pair and the above at least one chain tooth row is that one chain tooth row.

[0020] Furthermore, in the above-mentioned cases 2) and 3), as long as the one tooth row is classified into the adjacent group and the distant group, it does not matter whether the other tooth row is classified into the adjacent group and the distant group. Therefore, in the above-mentioned cases 2) and 3), the other tooth row may be composed of multiple types of teeth or all of the same type of teeth. More specifically, it may be composed of, for example, all strong teeth.

[0021] In addition, n from the number of opened pieces is consistent with the number of weak link teeth in the adjacent group. And, in the case of 1) above, it does not matter whether n of one link tooth row (the number of weak link teeth in the adjacent group) is the same as n of another link tooth row (the number of weak link teeth in the adjacent group).

[0022] What is expected is as follows.

[0023] That is, n is an integer equal to or smaller than a half of the total number of elements constituting the element row, or an integer equal to or smaller than a half of the total number of elements constituting the element row.

[0024] What is expected is as follows.

[0025] That is, n is 10 or less.

[0026] As a specific example of the weak fastener element and the strong fastener element, there are the following examples.

[0027] That is, the direction of the slider away from the opening member in the front-back direction is defined as the front direction, and the track of the claw tip of the stop claw passing above a pair of chain element rows is defined as the claw track. On this basis, for the corner between the upper surface and the front surface of the chain element and directly below the claw track, the surface of the corner of the weak chain element is a lowered angle surface compared to the surface of the corner of the strong chain element.

[0028] Furthermore, it is desirable that the left-right width of the angle-reduced surface is greater than or equal to the length of the portion where the claw tip contacts the weak element, that is, greater than or equal to the left-right width of the claw tip.

[0029] As a specific example of the angle reduction surface, the following is expected.

[0030] That is, the lowering angle surface lowers toward the front.

[0031] As a more specific example of the angle-reducing surface, there is the following example.

[0032] That is, the angle reduction surface is a curved surface that is curved in a state of bulging in an arc shape while decreasing toward the front.

[0033] In addition, as a specific example of the weak fastener element and the strong fastener element, there is the following example.

[0034] That is, the direction of the slider away from the opening member in the front-to-back direction is defined as the front direction, and the track of the claw tip of the stop claw passing above a pair of chain element rows is defined as the claw track. On this basis, for the front part of the upper surface of the chain element and directly below the claw track, the weak chain element is a forward inclined surface that decreases as it moves forward.

[0035] Furthermore, it is desirable that the left-right width of the forward inclined surface is greater than or equal to the length of the portion where the claw tip contacts the weak element, that is, greater than or equal to the left-right width of the claw tip.

[0036] As another specific example of the weak fastener element and the strong fastener element, there is the following example.

[0037] That is, the direction of the slider away from the opening member in the front-to-back direction is defined as the front direction, and the track of the claw tip of the stop claw passing above a pair of chain element rows is defined as the claw track. On this basis, for the entire area directly below the claw track on the upper surface of the chain element, the upper surface of the weak chain element is lower than the upper surface of the strong chain element.

[0038] In addition, as a more specific example of the upper surface of the weak fastener element, there is the following example.

[0039] That is, for the entire area directly below the claw track in the upper surface of the chain tooth, the upper surface of the weak chain tooth is lowered compared to the upper surface of the strong chain tooth, and the entire area from directly below the claw track to the direction opposite to the belt is a slope toward the end that decreases as it moves toward the side opposite to the belt.

[0040] In addition, the manufacturing method of the toothbrush belt of the present invention is the manufacturing method of the toothbrush belt used for the above-mentioned zipper, which includes the following steps: a first injection molding step of injection molding strong chain elements on the belt; a strong chain element removal step of forming a removal portion of the belt by removing the strong chain elements from a part of the belt; and a second injection molding step of injection molding an opening piece and a weak chain element in an area of ​​the belt including the removal portion.

[0041] As an example of the second injection molding step, the following two are listed.

[0042] That is, in one example of the second injection molding step, the opening tool piece is injection molded after the weak fastener element is injection molded.

[0043] In addition, in another example of the second injection molding step, the weak fastener element and the opening tool piece are injection molded at the same time.

[0044] Effects of the Invention

[0045] In the zipper of the present invention, when a pulling force is applied from the slider to one of the chain element rows, all the chain elements constituting the adjacent group are weak chain elements of a type that weakens the impact (slider locking strength) compared with strong chain elements, so that the impact applied to the weak chain elements and the stop claw when the slider is arranged in the adjacent group is weaker than the impact applied to the strong chain elements and the stop claw when the slider is arranged in the distant group. As a result, the chain elements, etc. are as difficult to be damaged as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a plan view showing the entire slide fastener according to the first embodiment of the present invention.

[0047] Figure 2 This is a cross-sectional view, as seen from a planar direction, showing the relationship between the claw tip and the fastener element in the slider of the slide fastener according to the first embodiment.

[0048] Figure 3 (A) and (B) are front views showing the relationship between the claw tip and the elements in the slide fastener of the first embodiment. (A) shows the relationship between the claw tip and the weak element, and (B) shows the relationship between the claw tip and the strong element.

[0049] Figure 4 This is a cross-sectional view of the slider in the slide fastener according to the first embodiment cut in the up-down direction.

[0050] Figure 5 Figures (A) to (E) are the front view, top view, bottom view, left view, and right view of the weak link tooth of the first embodiment, and Figures (S) to (W) are the front view, top view, bottom view, left view, and right view of the strong link tooth of the first embodiment.

[0051] Figure 6 Figures (A) to (E) are the front view, top view, bottom view, left view, and right view of the weak link tooth of the second embodiment, and Figures (S) to (W) are the front view, top view, bottom view, left view, and right view of the strong link tooth of the second embodiment.

[0052] Figure 7 Figures (A) to (D) are the front view, top view, left view, and right view of the weak link teeth of the third embodiment, and Figures (S) to (V) are the front view, top view, left view, and right view of the strong link teeth of the third embodiment.

[0053] Figure 8 Figures (A) to (D) are the front view, top view, bottom view, left view, and right view of the weak link teeth of the fourth embodiment, and Figures (S) to (V) are the front view, top view, left view, and right view of the strong link teeth of the fourth embodiment.

[0054] Fig. 9 It is a plan view showing the entire slide fastener according to a fifth embodiment of the present invention.

[0055] Fig.10 It is an explanatory diagram showing the method for manufacturing the slide fastener according to the first embodiment of the present invention in order of processes. DETAILED DESCRIPTION

[0056] like Figure 1 As shown, the slide fastener 1 of the first embodiment of the present invention includes: a pair of fastener tapes 2 extending in the front and rear and facing each other left and right; and a slider 3 that can move forward and backward at the opposite side edges of the pair of fastener tapes 2 and open and close the pair of fastener tapes 2. In addition, the "opposite side edges" refer to the right edge in the case of the fastener tape 2 on the left side, and refer to the left edge in the case of the fastener tape 2 on the right side.

[0057] The slide fastener 1 can open and close the pair of fastener tapes 2 by moving the slider 3 in the front-rear direction. The direction is determined as follows when the slide fastener 1 is placed on a flat surface.

[0058] The "front direction" is the direction in which a pair of fastener tapes 2 are closed. Figure 1 Middle is the upward direction.

[0059] The "rear direction" is the direction in which a pair of fastener belts 2 are opened. Figure 1 In the middle, it is the downward direction. In addition, the left-right direction refers to the direction in which a pair of tooth chain belts 2 are arranged in parallel. Figure 1 The middle is perpendicular to the front-back direction.

[0060] "Left direction" Figure 1 The left direction is in the middle. The right direction is in Figure 1 Middle is the right direction.

[0061] The "upward and downward direction" refers to the direction perpendicular to the front-back direction and the left-right direction, and is also called the thickness direction. Figure 1 The center refers to a direction toward the front side among directions perpendicular to the paper surface (directions perpendicular to the front-rear direction and the left-right direction).

[0062] The "downward direction" is Figure 1 The middle refers to a direction toward the back side in a direction perpendicular to the paper surface.

[0063] The pair of fastener belts 2 includes: a pair of belts 4 extending in the front-to-back direction and facing each other in the left-to-right direction; a pair of fastener element rows 5L each consisting of a plurality of fastener elements 5 fixed along the opposite side edges of the pair of belts 4; an opening member 6 fixed to the rear end portions of the pair of belts 4 in the front-to-back direction; and a pair of stoppers 7 fixed to the front end portions of the pair of belts 4 on the opposite side to the opening member 6. In addition, the direction in the front-to-back direction in which the slider 3 is moved away from the opening member 6 is the front direction.

[0064] The belt 4 is in the shape of a belt that is long from front to back, and its thickness direction is the up-down direction.

[0065] The stopper 7 and the opening member 6 contact the moving slider 3 to determine the range of movement of the slider 3 in the front-rear direction relative to the pair of element rows 5L. The front end of the stopper 7 in the front-rear direction of the belt 4 is fixed adjacent to the front side of the element row 5L.

[0066] The opening piece 6 is composed of a pair of opening piece pieces 61 and 62 respectively fixed to the rear end portions in the front-to-rear direction of the pair of belts 4 in a state adjacent to the rear side relative to the chain element row 5L. In the present embodiment, the opening piece piece 61 on one side is a plug 61 fixed to the opposite side edge portion of the belt 4 on one side, and the opening piece piece 62 on the other side is a base 62 fixed to the opposite side edge portion of the belt 4 on the other side.

[0067] The insert rod 61 is fixed to the belt 4 and covers the upper surface, the lower surface and the side surface of the belt 4. When the slider 3 is pulled down to contact the base 62, that is, when the slider 3 and the base 62 are in contact (front and back adjacent state), the insert rod 61 can be inserted and removed relative to the slider 3 and the base 62 together with one side of the chain tooth row 5L.

[0068] The base 62 determines the backward limit position of the slider 3 relative to the other chain element row 5L so that the slider 3 does not fall off the other chain element row 5L. The base 62 includes: a seat rod 63, which is parallel to the front part of the plug rod 61 when connected to the plug rod 61; and a socket 64, which is formed with a plug rod hole (not shown) through which the rear part of the plug rod 61 can be inserted and removed.

[0069] The seat bar 63 is fixed to the belt 4 in the same manner as the plunger 61 , and covers three surfaces of the belt 4 itself, namely, the upper surface, the lower surface, and the side surface on the belt 4 side facing the belt 4 .

[0070] The socket 64 includes a portion fixed to the belt 4 and a portion protruding toward the belt 4. The seat rod 63 extends forward from the front surface of the portion fixed to the belt 4. A rod insertion hole (not shown) is formed in the front surface of the portion protruding toward the belt 4.

[0071] The pull head 3 has a so-called automatic stop function, such as Figure 4The slider 3 is shown as comprising: a slider body 11 that engages and disengages a pair of chain element rows 5L; a stop claw 12 that stops the position relative to the pair of chain element rows 5L, and a claw tip 21 that is one end of the stop claw 12 descends inside the slider body 11 to contact the chain element 5; and a pull tab 13 that is connected to the stop claw 12 and the slider body 11 and is used to operate when the slider body 11 is moved. In addition, in the present embodiment, the slider 3 is further provided with: a leaf spring 14 that is an elastic component that presses the stop claw 12 downward and is a component independent of the stop claw 12; and a cover 15 that is a connecting component that covers the leaf spring 14 and the stop claw 12 and connects the pull tab 13 and the stop claw 12 to the slider body 11, and is a component independent of the slider body 11. For the slider 3, if the pull tab 13 is pulled up, the claw tip 21 moves to a position above the chain tooth row 5L, thereby becoming a state in which the slider body 11 can be moved relative to a pair of chain tooth rows 5L. If the pull tab 13 is released, the claw tip 21 descends and contacts the chain tooth 5, causing the slider body 11 to stop relative to the pair of chain tooth rows 5L.

[0072] The pull tab 13 can rotate forward and backward. Rotation refers to the movement when the pull tab 13 is operated to rotate forward and backward when the pair of fastener tapes 2 are opened and closed by the slider 3. The pull tab 13 includes: a grip portion 13a, which is used to grip when the pull tab 13 is operated; and a pull tab connecting portion 13b, which extends from the grip portion 13a and is connected to the slider body 11. The pull tab connecting portion 13b is annular, and a part of the annular shape is a shaft portion that becomes the center when the pull tab 13 is rotated.

[0073] The slider body 11 comprises: an upper wing plate 31 and a lower wing plate 32, which are spaced apart and opposed to each other in the up-down direction; a connecting column 33, which connects the front portion of the upper wing plate 31 and the front portion of the lower wing plate 32 relative to each other, and is sandwiched between a pair of chain teeth 5L; and a flange 34, which protrudes from the left and right ends of at least one of the upper wing plate 31 and the lower wing plate 32 (both sides in the example shown in the figure) in a direction that narrows the relative distance between the two.

[0074] In addition, if Figure 2 , 4 As shown, the slider body 11 has a tooth path 36 that penetrates in the front-to-back direction, and a belt groove 37 that is connected to the tooth path 36 and is open to the left and right as its internal space. A pair of tooth rows 5L pass through the tooth path 36, and the belt 4 on the corresponding side passes through each belt groove 37. In addition, the front part of the tooth path 36 is branched into two branches on the left and right relative to the connecting column 33, and the rear part of the tooth path 36 extends backward in a straight line relative to the connecting column 33.

[0075] The upper wing plate 31 includes: an upper wing plate main body 31a that partitions the upper side of the element passage 36; and a front column 31b and a rear column 31c that protrude from the upper surface of the upper wing plate main body 31a at intervals in the front and rear. The shaft of the pull tab 13, the stop claw 12, the leaf spring 14, and the cover 15 are sequentially provided on the upper surface of the upper wing plate main body 31a. A claw support recess 31d that supports one end of the stop claw 12 is formed in a recessed manner on the upper surface of the front column 31b. In addition, a claw hole 31h for inserting the claw tip 21 as the distal end of the stop claw 12 into the element passage 36 is formed at a position on the rear side of the upper wing plate main body 31a relative to the connecting column 33. The claw hole 31h is a through hole that penetrates the upper wing plate 31 in the up-down direction.

[0076] On the lower surface of the cover 15, an interlocking recess 15a is formed in an upwardly recessed manner to interlock with the front column portion 31b and the rear column portion 31c. The lower part of the interlocking recess 15a interlocks the front column portion 31b and the rear column portion 31c. A spring support portion 15b that supports the front and rear ends of the leaf spring 14 is provided on the upper part of the inner surface of the interlocking recess 15a. The spring support portion 15b is, for example, a recessed portion. The leaf spring 14 supported by the spring support portion 15b can be bent toward the bottom surface (upper surface) of the inner surface of the interlocking recess 15a. In addition, an axis penetration recess 15c is formed on the left and right sides of the cover 15 in a state that penetrates from left to right and opens downward to allow the axis of the pull tab 13 to pass through.

[0077] The stopping claw 12 comprises: a claw body 22 extending forward and backward on the shaft of the pull tab 13; a claw insertion portion 23 extending downward from one end (front end) of the claw body 22 in the front-to-back direction and inserted into the claw support recess 31d; and a claw tip 21 extending downward from the other end (rear end) of the claw body 22 in the front-to-back direction.

[0078] The claw body 22 is pressed from above by the leaf spring 14. When the pull tab 13 is pulled up, the claw body 22 rises, and the claw tip 21 rises accordingly, and the claw tip 21 is lifted to a position above the element 5, so that the slider 3 can move along a pair of element rows 5L.

[0079] In the present embodiment, the claw tip 21 of the stop claw 12 enters the portion where the left and right element rows 5L are engaged and separated inside the slider body 11, thereby stopping the slider body 11. In addition, the stop claw 12 is supported at a position above the claw tip 21 in such a manner that the position of the lower end of the claw tip 21 is constant inside the slider body 11. In the present embodiment, the claw tip 21 extends downward from the rear relative to the lower surface 22a of the other end of the claw body 22. Therefore, the front portion of the other end of the claw body 22 is in a state of protruding forward compared to the claw tip 21, and is supported on the upper surface of the upper wing plate 31 in front relative to the claw hole 31h.

[0080] The pair of fastener element rows 5L is a bilaterally symmetrical structure. The fastener element rows 5L are composed of a plurality of fastener elements 5 fixed along the opposite side edges of the pair of belts 4. Figure 5 As shown in (S) to (W) of FIG. 1 , the fastener 51 includes: a fixing portion 51 fixed to the belt 4 in a state of clamping the belt 4 from both sides in the thickness direction; and an engaging portion 52 protruding from the fixing portion 51 to the side opposite to the belt 4 (hereinafter referred to as the "opposite side of the belt") and engaging with other fastener elements 5. By the way, in Figure 5 The belt 4 is omitted. In addition, the side opposite to the belt opposite side in the left-right direction is referred to as the "belt side". In addition, the fastener element 5 has an upper half 53 fixed to the upper surface side of the belt 4 and extending to the belt opposite side; and a lower half 54 fixed to the lower surface side of the belt 4 and extending to the belt opposite side in the vertical direction. The upper half 53 and the lower half 54 are integrated on the meshing portion 52 side.

[0081] The fastener element 5 of the first embodiment has an upper half 53 and a lower half 54 in an asymmetric shape.

[0082] The upper half 53 includes an upper fixing portion 53 a fixed to the upper surface of the belt 4 , and an upper engaging portion 53 b extending from the upper fixing portion 53 a to the opposite side of the belt.

[0083] The lower half 54 includes a lower fixing portion 54a fixed to the lower surface of the belt 4 and a lower engaging portion 54b extending from the lower fixing portion 54a to the opposite side of the belt. The upper engaging portion 53b and the lower engaging portion 54b are joined together on the opposite side of the belt and have an asymmetric shape.

[0084] The lower engaging portion 54b includes a lower neck portion 54c extending from the lower fixing portion 54a to the opposite side of the belt and being constricted forward and backward relative to the lower fixing portion 54a; and a lower head portion 54d extending from the lower neck portion 54c to the opposite side of the belt and being bulged forward and backward relative to the lower neck portion 54c.

[0085] The upper engaging portion 53b includes an upper shoulder 53c extending from the upper fixing portion 53a to the opposite side of the belt and projecting forward and backward relative to the lower neck 54c, and an upper head 53d extending from the upper shoulder 53c to the opposite side of the belt and recessed forward and backward relative to the lower head 54d.

[0086] The upper shoulder 53c has a tapered shape in which the front-rear width narrows in both the front-rear direction as it goes toward the opposite side of the belt. The surface of the upper shoulder 53c that faces the opposite side of the belt is formed substantially parallel to the front-rear direction of the belt 4.

[0087] The upper head 53d protrudes from the front and rear middle part of the surface facing the opposite side of the upper shoulder 53c to the opposite side of the belt. In addition, the upper head 53d also becomes a terminal tapered shape that narrows the front and rear width from both directions of the front and rear direction as it faces the opposite side of the belt.

[0088] The fixing portion 51 is composed of an upper fixing portion 53a and a lower fixing portion 54a. The meshing portion 52 is composed of an upper meshing portion 53b and a lower meshing portion 54b. When a pair of chain element rows 5L are in a meshing state, two chain elements 5 adjacent to each other in the front and rear are in a meshing state in which the upper shoulder 53c of one chain element 5 overlaps with the lower head 54d of the other chain element 5 in the upper and lower parts, the lower neck 54c of one chain element 5 is adjacent to the lower head 54d of the other chain element 5 in the front and rear parts, and the lower head 54d of one chain element 5 is adjacent to the lower head 54d of the other chain element 5 in the left and right parts.

[0089] In this embodiment, the fastener element row 5L with which the claw tip 21 of the stopping claw 12 contacts is as follows. Figure 1 , 2 The figure shows a pair of fastener element rows 5L. In addition, when the slider 3 moves forward and backward, the claw tip 21 of the stop claw 12 passes over the pair of fastener element rows 5L. Figure 2 In FIG. 1 , the claw tip 21 is shown as a rectangle in a plan view. The path of the claw tip 21 passing over the pair of element rows 5L is referred to as a claw path t. The claw path t is parallel to the front-rear direction in which the belt 4 extends. Figure 1 The claw trajectory t is shown by a line in FIG. Figure 2 The claw trajectory t is shown as a band with a constant width on the left and right. In addition, the claw trajectory t in this embodiment is assumed to be a trajectory in which the claw tip 21 passes above the meshing portion 52, more specifically, above the upper shoulder 53c (lower neck 54c) for the right-side chain element row 5L, and above the upper head 53d for the left-side chain element row 5L.

[0090] The tooth row 5L is formed by multiple types of tooth 5, and in the present embodiment, two types of tooth 5. In addition, the tooth row 5L is classified into multiple types according to the group (class) which is a collection of the tooth 5. And the tooth row 5L is classified into: an adjacent group C1, which is a collection of the tooth 5 adjacent to the opening member 6 and counting from the opening member 6 to the nth; and a distant group C2, which is a collection of the tooth 5 from the opening member 6 to the n+1th and thereafter. That is, n is consistent with the total number of the adjacent group C1. In addition, in the present embodiment, the tooth 5 constituting the adjacent group C1 and the tooth 5 constituting the distant group C2 are of different types. And, in the case of distinguishing, in addition to the reference numeral 5, the tooth constituting the adjacent group C1 is also marked with 8, and in addition to the reference numeral 5, the tooth constituting the distant group C2 is also marked with 9, and they are only recorded as 8 and 9 in the article.

[0091] The total number Z of the fastener elements 5 constituting one fastener element row 5L is n+1 or more. n is an integer greater than 1. That is, the minimum value of n is 1.

[0092] It is desirable that the maximum value of n is equal to or less than an integer of a half value of the total number Z of the fastener elements 5 , or equal to or less than an integer closest to the half value.

[0093] For example, if the total number Z of the fastener elements 5 is an even number, there are three values ​​of half of the total number and ±1 of the half value. Specifically, when the total number Z of the fastener elements 5 is 40, the half value is 20, and the integers closest to the half value are 19 and 21. Furthermore, when the total number Z of the fastener elements 5 is 40, n can be any one of 19, 20, and 21 or less. Since the larger integer closest to the half value is 21, n is 21 or less.

[0094] If the total number Z of the chain elements 5 is an odd number, the value of half of the total number is the value of the integer + 0.5. And there are two integers closest to the half value. Specifically, when the total number Z of the chain elements 5 is 41, the value of half is 20.5, and the integers closest to the half value are 20 and 21. And, when the total number Z of the chain elements 5 is 41, n can be less than either 20 or 21. Since the larger number of the integers closest to the half value is 21, n is less than 21. In other words, the maximum value of n is the smallest integer greater than the value of half of the total number of chain elements 5.

[0095] A more desirable maximum value of n is less than 10. Figure 1 In the example of , all the numbers of the fastener elements 5 constituting a pair of fastener element rows 5L are the same, and the total number of the fastener elements 5 of the adjacent group C1 is n=5.

[0096] Regarding the impact (slider locking strength) applied to the chain elements 5 and the stop claw 12 that touch inside the slider 3 when a pulling force is applied from the slider 3 to one of the chain element rows 5L, the chain elements 5 constituting the away group C2 have strong chain elements 8 of a type that strengthen the impact compared to the chain elements 5 constituting the adjacent group C1. In the present embodiment, all the chain elements 5 constituting the away group C2 are strong chain elements 8. On the other hand, all the chain elements 5 constituting the adjacent group C1 are weak chain elements 9 of a type that weaken the impact compared to the strong chain elements 8. In addition, strengthening the impact and weakening the impact are relative expressions. And, strengthening the impact means, in other words, that the impact load is large relative to the comparison object. On the other hand, weakening the impact means, in other words, that the impact load is small relative to the comparison object.

[0097] The weak link teeth 9 and the strong link teeth 8 differ in the impact on the claw tip 21 of the stop claw 12 (slider locking strength). The factors that produce the difference in the impact are the difference in hardness of the material and the difference in shape. If there is a difference in hardness, the impact of the material with relatively hard hardness is strong, and the impact of the material with relatively soft hardness is weak. In this embodiment, the factor that produces the difference in the impact is the difference in shape.

[0098] The weak coupling element 9 and the strong coupling element 8 have the same shape in the lower half 54. On the other hand, the weak coupling element 9 and the strong coupling element 8 have different shapes in the upper half 53. In addition, both the weak coupling element 9 and the strong coupling element 8 have symmetrical shapes in the front-rear direction.

[0099] like Figure 5 As shown in (A), (B), (S), and (T), for the entire area directly below the claw trajectory t in the upper surface of the link tooth 5, the upper surface 90 of the weak link tooth 9 is lowered compared to the upper surface 80 of the strong link tooth 8. In addition, the relationship between the link tooth 5 and the claw trajectory t is described for the link tooth 5 of the link tooth row 5L on the right side. In more detail, the upper surface 90 of the weak link tooth 9 has the highest top surface 90a on the belt side portion, and has an end slope 91 that decreases toward the opposite side of the belt on the opposite side of the belt. On the other hand, the upper surface 80 of the strong link tooth 8 is set to the same height as the top surface 90a of the weak link tooth 9, and is set to a plane orthogonal to the up and down direction for the entire range located on the left and right sides relative to directly below the claw trajectory t.

[0100] In addition, if Figure 3 As shown, for the entire area directly below the claw track t in the upper surface of the fastener element 5, the upper surface of the weak fastener element 9 (the inclined surface 91 toward the end) is lowered compared with the upper surface 80 of the strong fastener element 8, so that Figure 5 As shown, at the corner between the upper surface and the front surface of the fastener element 5 and directly below the claw trajectory t, the surface of the corner of the weak fastener element 9 is a lowered angle surface 92 lowered than the surface of the corner of the strong fastener element 8 .

[0101] The surface of the corner portion of the weak link element 9 (the angle-reducing surface 92) and the surface of the corner portion of the strong link element 8 are both curved surfaces that are curved in a state of bulging in an arc shape, which is a shape commonly known as a chamfer. In the present embodiment, the surface of the corner portion of the weak link element 9 (the angle-reducing surface 92 (curved surface)) and the surface of the corner portion of the strong link element 8 (curved surface) are in the shape of an arc with the radius set to the same length. By the way, since they are curved in a state of bulging in an arc shape, the center of the arc is located at a lower side than the upper surface of the link element 5, and is located at a rear side than the front surface of the link element 5. In addition, since they are curved in a state of bulging in an arc shape, the curved surfaces of the strong link element 8 and the weak link element 9, which are the surfaces of the corner portion, are lowered as they move forward. In addition, both the weak link element 9 and the strong link element 8 are symmetrical in the front-to-back direction. Therefore, for the corner between the upper surface and the rear surface of the link element 5 and directly below the claw trajectory t, the surface of the corner of the weak link element 9 is also a lowered angle surface 92 that is lower than the upper surface of the corner of the strong link element 8.

[0102] In the slide fastener 1 of the first embodiment, all the elements 5 constituting the adjacent group C1 are weak elements 9 of a type that weakens the impact compared with the strong elements 8. Therefore, when the slider 3 is pulled down halfway with the pair of element rows 5L in mesh (when the slider 3 is separated from the opening member 6), when a pulling force is applied from the slider 3 to one of the element rows 5L, the impact (slider locking strength) applied to the weak elements 9 and the stop claw 12 when the slider 3 is arranged in the adjacent group C1 is weaker than the impact applied to the strong elements 8 and the stop claw 12 when the slider 3 is arranged in the distant group C2. In addition, since the slide fastener 1 of the first embodiment weakens the impact in this way, the stop claw 12 is easier to pass over the elements 5, and the elements 5 and the stop claw 12 are less likely to be damaged, compared with, for example, a slide fastener in which all the elements 5 are composed of strong elements 8.

[0103] In more detail, a situation in which the claw tip 22a is arranged between the front and rear adjacent chain elements 5 in a non-contact state when a pair of chain element rows 5L are in an engaged state and the slider 3 is stopped relative to the position of the pair of chain element rows 5L (a situation in which the claw body 22 is supported on the upper surface of the upper wing plate 31 in front of the claw hole 31h) is assumed to be a reference state. In the case of the reference state, no pulling force is applied to the chain element rows 5L on both sides. In addition, in the case of the reference state, the height of the lowest end of the claw tip 21 becomes the same height at any position of the pair of chain element rows 5L. Furthermore, if a pulling force is applied to one of the chain element rows 5L, the slider 3 moves slightly toward the opening member 6, and the claw tip 21 touches the front surface of the chain element 5. In the case of Figure 3As shown in (A), when the claw tip 21 touches the front surface of the element 5, the slider 3 is arranged in the adjacent group C1, and the position of the upper surface (the inclined surface 91 toward the end) of the weak element 9 relative to the position of the lower end of the claw tip 21 is as shown in Figure 3 As shown in (B), the claw tip 21 is lower than the position of the upper surface 80 of the strong element 8, so it is easier for the claw tip 21 to pass over the upper surface of the weak element 9 than to pass over the upper surface of the strong element 8. In addition, the impact applied to the weak element 9 and the stop claw 12 is weaker than the impact applied to the strong element 8 and the stop claw 12.

[0104] In addition, the slide fastener 1 of the first embodiment includes the weak elements 9 of the adjacent group C1 in the pair of element rows 5L, so when the claw tip 21 passes over the upper surface of the weak elements 9 of both element rows 5L, the impact applied to the weak elements 9 and the stop claw 12 is weaker than the impact applied to the strong elements 8 and the stop claw 12. In particular, the claw tip 21 is arranged to be biased to one side of the left or right relative to the connecting column 33, so that the tip slope 91 of the weak element 9 on the opposite side is lower than the tip slope 91 of the weak element 9 on the biased side, and the claw tip 21 is more likely to pass over the weak element 9 on the opposite side than the weak element 9 on the biased side.

[0105] In addition, the slide fastener 1 of the first embodiment is set to have a total number n of the elements 5 of the adjacent group C1 = 5, in other words, less than half of the total number Z of the elements 5 constituting the element row 5L, that is, less than n = 10. In this way, when the user moves the slider 3 so as to be located in the adjacent group C1 and the slider 3 is separated from the opening member 6, a pulling force may be accidentally applied to one of the element rows 5L. In this case, the claw tip 21 is more likely to pass over the upper surface of the weak element 9 than the upper surface of the strong element 8.

[0106] The fastener element 5 of the slide fastener according to the second embodiment of the present invention is as follows: Figure 6 As shown in (S) to (W), the shape of the strong link element 8 is set to the same shape as the strong link element 8 of the first embodiment. Figure 6 As shown in (A) to (E) of FIG. 1 , the weak fastener element 9a is formed into a shape slightly different from the weak fastener element 9 in the first embodiment.

[0107] In the front and rear parts of the entire region directly below the claw track t in the upper surface of the element 5, except for the middle part, the upper surface 90 of the weak element 9a is lowered compared with the upper surface 80 of the strong element 8, and in the middle part in the front-back direction in the entire region, the upper surface 90 of the weak element 9a is formed to be the same height as the upper surface 80 of the strong element 8. Therefore, the weak element 9a of the second embodiment is also, in the corner between the upper surface and the front surface of the element 5 and directly below the claw track t, the upper surface of the corner of the weak element 9a is a lowered angle surface 92a lowered compared with the upper surface of the corner of the strong element 8. In addition, both the weak element 9a and the strong element 8 have a symmetrical shape in the front-back direction, so the surface of the corner of the weak element 9a is also a lowered angle surface 92a lowered compared with the upper surface of the corner of the strong element 8 in the corner between the upper surface and the rear surface of the element 5 and directly below the claw track t.

[0108] In more detail, the upper surface 90 of the weak link element 9a has the middle part in the front-to-back direction as the top surface 90b, the front part relative to the middle part is set as the forward inclined surface 93 that decreases as it goes forward, and the rear part relative to the middle part is set as the rear inclined surface 94 that decreases as it goes backward. On the other hand, the upper surface 80 of the strong link element 8 is a plane orthogonal to the up-down direction in the entire area in the front-to-back direction. In addition, the upper surface of the corner between the upper surface 90 of the weak link element 9a and the front surface (the lowered angle surface 92a) is in the shape of an arc with a radius larger than the radius of the upper surface (curved surface) of the corner of the strong link element 8.

[0109] In the zipper of the second embodiment, when a pulling force is applied to one chain tooth row 5L, since the front portion of the upper surface 90 of the weak chain tooth 9a is set as a forward inclined surface 93, the claw tip 21 is easier to pass over the upper surface of the weak chain tooth 9a than to pass over the upper surface of the strong chain tooth 8, and the impact applied to the weak chain tooth 9a and the stop claw 12 (slider locking strength) is weaker than the impact applied to the strong chain tooth 8 and the stop claw 12.

[0110] The fastener element 5b of the slide fastener according to the third embodiment of the present invention is as follows: Figure 7 Such a shape is different from the fastener element 5 of the first embodiment.

[0111] The fastener element 5b is similar to the fastener element 5 of the first embodiment in that it has a fixing portion 51 and an engaging portion 52 in the horizontal direction. However, the fastener element 5b has an upper half 55 and a lower half 56 symmetrically in the vertical direction, which is clearly different from the fastener element 5 of the first embodiment.

[0112] The meshing portion 52 includes a neck portion 52a extending from the fixing portion 51 to the opposite side of the belt and being necked forward and backward relative to the fixing portion 51; a head portion 52b extending from the neck portion 52a to the opposite side of the belt and bulging forward and backward relative to the neck portion 52a; and a pair of shoulders 52c extending forward and backward from the fixing portion 51 side of the neck portion 52a and meshing with a groove portion 52d formed in the head portion 52b of the other fastener element 5b. The groove portion 52d opens to the opposite side of the belt at the middle portion of the height in the up-down direction of the head portion 52b and penetrates in the front-back direction.

[0113] In this embodiment, the claw trajectory t is set to one side (at Figure 7 For the fastener element row 5L on the right side (in the middle), the claw tip 21 passes over the pair of shoulders 52c, and for the other side (on the right side), the claw tip 21 passes over the pair of shoulders 52c. Figure 7 For the chain element row 5L (left side in the middle), the track of the claw tip 21 passing above the head 52b is as follows. Figure 7 The relationship between the fastener element 5 b and the claw trajectory t will be described with respect to the fastener element 5 b of the fastener element row 5L on the right side.

[0114] The upper surface 90 of the weak link element 9b has a boundary slope 96 that decreases as it moves toward the opposite side of the belt at the boundary portion between the fixed portion 51 and the meshing portion 52. In addition, the upper surface of the weak link element 9b has a portion located on the belt side relative to the boundary slope as a top surface 90c that is the upper surface of the fixed portion 51, and a portion located on the opposite side of the belt relative to the boundary slope 96 as a lower step difference surface 95 that is a plane that is lowered in a step-like manner relative to the top surface 90c of the fixed portion and is orthogonal to the up and down direction. In other words, the upper surface 90 of the weak link element 9b has a top surface 90c that is the upper surface of the fixed portion 51, a lower step difference surface 95 that is lowered in a step-like manner, and a boundary slope 96. A portion of the lower step difference surface 95 (the belt side portion) and the boundary slope 96 are arranged in the entire area directly below the claw track t in the upper surface of the link element 5b.

[0115] On the other hand, the upper surface 80 of the strong element 8 forms the fixing portion 51 and the meshing portion 52 at the same height as the upper surface (top surface 90c) of the fixing portion 51 of the weak element 9b. Thus, the upper surface 90 of the weak element 9 is lower than the upper surface 80 of the strong element 8 for the entire area directly below the claw track t in the upper surface of the element 5b.

[0116] For the entire area directly below the claw trajectory t in the upper surface of the chain element 5b, the upper surface 90 of the weak chain element 9b (a portion of the lower layer difference surface 95 and the boundary slope 96) is lower than the upper surface 80 of the strong chain element 8b. Therefore, for the corner between the upper surface and the front surface in the chain element 5b and directly below the claw trajectory t, the surface of the corner of the weak chain element 9b is a lowered angle surface 92b that is lower than the surface of the corner of the strong chain element 8b.

[0117] The surface of the corner of the weak link element 9b (angle reduction surface 92b) and the surface of the corner of the strong link element 8b are both curved surfaces that are curved in a state of bulging in an arc shape. In the present embodiment, the surface of the corner of the weak link element 9b (angle reduction surface 92b) and the surface of the corner of the strong link element 8b (curved surface) are in an arc shape with the radius set to the same length. In addition, since they are curved in a state of bulging in an arc shape, the curved surfaces of the corner surfaces of the weak link element 9b and the strong link element 8b decrease as they move forward.

[0118] In addition, both the weak link element 9b and the strong link element 8b are symmetrical in the front-to-back direction. Therefore, for the corner between the upper surface and the rear surface of the link element 5 and directly below the claw trajectory t, the surface of the corner of the weak link element 9b is a lowered angle surface 92b that is lower than the upper surface of the corner of the strong link element 8b.

[0119] In the zipper of the third embodiment, when a pulling force is applied to one chain tooth row 5L, the position of the upper surface 90 (boundary slope 96) of the weak chain tooth 9b is lowered compared to the position of the upper surface 80 of the strong chain tooth 8b for the entire area directly below the claw trajectory t, so that the claw tip 21 is easier to pass over the upper surface of the weak chain tooth 9b than to pass over the upper surface of the strong chain tooth 8b.

[0120] The fastener element 5b of the slide fastener according to the fourth embodiment of the present invention is as follows: Figure 8 As shown in (S) to (V), the shape of the strong link element 8b is set to the same shape as the strong link element 8b of the third embodiment. Figure 8 As shown in (A) to (D) of FIG. 1 , the weak fastener element 9c is formed into a shape slightly different from the weak fastener element 9b in the third embodiment. In addition, the relationship between the fastener element 5b of the fastener element row 5L on the right side and the claw trajectory t will be described.

[0121] For the front and rear parts of the entire area directly below the claw track t in the upper surface of the element 5b, except for the middle part, the upper surface 90 of the weak element 9c is lowered compared to the upper surface 80 of the strong element 8b, and for the front and rear middle parts in the entire area, the upper surface 90 of the weak element 9c is formed at the same height as the upper surface 80 of the strong element 8b. Therefore, the weak element 9c of the fourth embodiment is also, for the corner between the upper surface and the front surface of the element 5b and directly below the claw track t, the surface of the corner of the weak element 9c is a lowered angle surface 92c lowered compared to the upper surface of the corner of the strong element 8b. In addition, for the corner between the upper surface and the rear surface of the element 5b and directly below the claw track t, the surface of the corner of the weak element 9c is also a lowered angle surface 92c lowered compared to the surface of the corner of the strong element 8b.

[0122] In addition, the surface of the corner of the weak link element 9c (the angle-reducing surface 92c) and the surface of the corner of the strong link element 8b are both curved surfaces that are curved in a state of bulging in an arc shape. The upper surface of the corner of the weak link element 9c (the angle-reducing surface 92c) is in an arc shape with a radius larger than the upper surface (curved surface) of the corner of the strong link element 8b.

[0123] More specifically, the upper surface 90 of the weak link element 9c has a top surface 90d in the middle portion in the front-to-back direction, and the front portion is provided with a forward inclined surface 97 that decreases toward the front relative to the middle portion, and the rear portion is provided with a rearward inclined surface 98 that decreases toward the rear relative to the middle portion. On the other hand, the upper surface 80 of the strong link element 8b is a plane orthogonal to the up-down direction in the entire area in the front-to-back direction (except for the corners with the front surface and the corners with the rear surface), and is provided at the same height as the top surface 90d of the weak link element 9c.

[0124] In the fourth embodiment of the zipper 1, when a pulling force is applied to one side of the chain tooth row 5L, since the front part of the upper surface 90 of the weak chain tooth 9c is set as a forward inclined surface 97, the claw tip 21 is easier to pass over the upper surface of the weak chain tooth 9c than to pass over the upper surface of the strong chain tooth 8b, and the impact applied to the weak chain tooth 9c and the stop claw 12 (slider locking strength) is weaker than the impact applied to the strong chain tooth 8b and the stop claw 12.

[0125] like Fig. 9 As shown, the slide fastener 1a of the fifth embodiment of the present invention is different from the slide fastener 1 of the first embodiment in that it has two sliders 3 and 3a and in the structure of an opening tool 6a. However, the structures of the adjacent group C1 and the distant group C2 are the same as those of the slide fastener of the first embodiment.

[0126] One of the two sliders 3, 3a is a first slider 3 that closes a pair of chain element rows 5L by moving in the forward direction, and the other is a second slider 3a that closes a pair of chain element rows 5L by moving in the rearward direction. The first slider 3 has the same structure as the slider 3 of the first embodiment. The second slider 3a has a structure symmetrical to the first slider 3 in the front-rear direction except that it does not have a stop claw 12.

[0127] The opening piece 6a is composed of a pair of opening piece pieces 61a and 62a respectively fixed at the rear end portions of a pair of belts 4 in the front-to-back direction in a state adjacent to the rear side relative to the chain element row 5L. In the present embodiment, the opening piece piece 61a on one side is an insert rod 61a fixed to the opposite side edge portion of the belt 4 on one side, and the opening piece piece 62a on the other side is a seat rod 62a fixed to the opposite side edge portion of the belt 4 on the other side. When the second slider 3a is located at the rear end portion of the seat rod 62a, the same function as the base of the first embodiment is exerted. In addition, when the second slider 3a and the first slider 3 are arranged at the rear end portion of the chain element row 5L on one side in a state adjacent to each other in the front-to-back direction, the rear end portion of the chain element row 5L on the other side can be inserted and pulled out from one side relative to the left and right chain element passages 36 of the first slider 3 and the second slider 3a.

[0128] The slide fastener 1 a of the fifth embodiment has the same effects as those of the slide fastener 1 of the first embodiment.

[0129] like Fig.10 As shown, the manufacturing method of the slide fastener 1 of the above-mentioned first embodiment is performed in the order of the following steps 1) to 9).

[0130] 1) Tape preparation step: The tape preparation step is a step of preparing a pair of tapes 4. In order to mass-produce a plurality of slide fasteners 1, the tapes 4 are long and long.

[0131] 2) First injection molding step. The first injection molding step is to injection mold the strong link element 8 on a pair of left and right opposing belts 4. In addition, the first injection molding step is a step in which a gate portion G is formed parallel to the pair of belts 4, and the strong link element 8 is formed in a state where the gate portion G and the belt 4 are connected at intervals in front and behind the left and right edges of the gate portion G.

[0132] 3) Gate portion removal step The gate portion removal step is a step of removing the gate portion G to achieve a state in which the strong fastener elements 8 are fixed to each of the pair of belts 4 .

[0133] 4) Engagement Step The engagement step is a step of engaging the pair of belts 4 with each other using the fastener elements 8 .

[0134] 5) Strong link element removal process and belt reinforcement process. The strong link element removal process is a process of forming a removal portion 4b in a pair of belts 4 by removing a portion of the strong link elements 8 in meshing from a portion of the belt 4. The belt reinforcement process is a process of attaching a reinforcement belt 4a to the belt 4 including the middle portion of the removal portion 4b in the front-back direction and its left and right peripheries, and then partially punching out the belt 4 together with the reinforcement belt 4a.

[0135] 6) The second injection molding step. The second injection molding step is a step of injection molding a pair of opening piece pieces 61, 62 and a weak link tooth 9 in an area including a removed portion of a pair of belts 4. More specifically, the second injection molding step can be performed by injection molding the opening piece pieces 61, 62 after the weak link tooth 9 is injection molded, or by injection molding the weak link tooth and the opening piece pieces 61, 62 at the same time. Through the second injection molding step, the link tooth row 5L is completed. In addition, in the accompanying drawings, the weak link tooth 9 is engaged, and the opening piece 6 is also in a state where the insert rod 61 is inserted into the base 62, but in fact, after the second injection molding step, an engagement step is performed in which the insert rod 61 is inserted into the hole of the base 62 to engage the pair of link tooth rows 5L again.

[0136] 7) Cutting step: The cutting step is a step of cutting the pair of tapes 4 into a predetermined length required for one slide fastener 1 .

[0137] 8) Slider Insertion Step The slider insertion step is a step of inserting the slider 3 into the pair of element rows 5L from the side opposite to the opening tool 6. When the slider 3 is inserted, the portion of the pair of element rows 5L through which the slider 3 passes is separated to the left and right.

[0138] 9) The third injection molding step. The third injection molding step is a step of injection molding the stopper 7 on the belt 4 on the side opposite to the opening member 6 relative to the element row 5L. Through the above steps, the slide fastener 1 of the first embodiment is completed. Injection molding means that in this embodiment, the element 5, the opening member 6, and the stopper 7 are made of plastic.

[0139] The manufacturing method of the slide fastener 1 of the first embodiment is a method for efficiently manufacturing a plurality of slide fasteners 1. Furthermore, since a pair of fastener tapes 2 are manufactured by manufacturing the slide fastener 1, the manufacturing method of the fastener tapes 2 is also described by describing the manufacturing method of the slide fastener 1. Furthermore, the manufacturing method of the slide fastener 1 is not limited to the manufacturing method of the slide fastener 1 of the first embodiment, and may be, for example, a pair of fastener tapes 2 are manufactured separately, and then the slider 3 is inserted into a pair of element rows 5L.

[0140] The present invention is not limited to the above-described embodiments, and can be appropriately modified within a scope not departing from the gist of the invention.

[0141] For example, in order to stop the slider body 11, the claw tip 21 of the stopping claw 12 enters between the front and rear adjacent meshing parts 52 of the left and right chain tooth rows 5L inside the slider body 11 in the present embodiment, but the present invention is not limited to this and may also enter between the front and rear adjacent fixing parts 51 of a chain tooth row 5L.

[0142] In addition, although the element row 5L is comprised of two types of elements in the above-mentioned embodiment, the present invention is not limited thereto, and three or more types may be sufficient.

[0143] Description of Reference Numerals

[0144] 1. 1a Zipper

[0145] 2 tooth chain belt

[0146] 3.3a ​​Slider

[0147] 11 Slider body

[0148] 12 Stop claw

[0149] 13 Pull Tab

[0150] 13a Grip

[0151] 13b Pull tab connection

[0152] 14 Leaf Spring

[0153] 15 Hood

[0154] 15a fitting recess

[0155] 15b Spring support

[0156] 15c Shaft passes through recess

[0157] 21 Claw Tip

[0158] 22 Claw main body

[0159] 22a Lower surface

[0160] 23 Claw insertion part

[0161] t claw trajectory

[0162] 31 Upper wing plate

[0163] 31a Upper wing plate main body

[0164] 31b Anterior column

[0165] 31c Rear pillar

[0166] 31d claw support recess

[0167] 31h Claw hole

[0168] 32 Lower wing plate

[0169] 33 Connecting column

[0170] 34 Flange

[0171] 36 Chain tooth path

[0172] 37 with slot

[0173] 4 belts

[0174] 4a Reinforcement belt

[0175] 4b Removal of part

[0176] 5, 5b chain teeth

[0177] 51 Fixed part

[0178] 52 meshing part

[0179] 52a Neck

[0180] 52b Head

[0181] 52c Shoulder

[0182] 52d groove part

[0183] 53 Upper part

[0184] 53a Upper fixing part

[0185] 53b Upper meshing portion

[0186] 53c Upper Shoulder

[0187] 53d Upper head

[0188] 54 Lower half

[0189] 54a Lower fixing portion

[0190] 54b Lower meshing portion

[0191] 54c Lower neck

[0192] 54d Lower head

[0193] 55 Upper part

[0194] 56 Lower half

[0195] 5L chain teeth

[0196] 6.6a Open the file

[0197] 61, 61a Open the piece (insert the rod)

[0198] 62, 62a Open the pieces (base, seat bar)

[0199] 63 Seat Rod

[0200] 64 sockets

[0201] 7 Stopper

[0202] 8, 8b strong chain teeth

[0203] 80 Upper surface

[0204] 9, 9a, 9b, 9c Weak chain teeth

[0205] 90 Upper surface

[0206] 90a, 90b, 90c, 90d top surface

[0207] 91 Bevel towards end

[0208] 93, 97 Forward slope

[0209] 94, 98 rearward bevel

[0210] 95 Lower layer difference surface

[0211] 96 Boundary Slope

[0212] 92, 92a, 92b, 92c Lowering angle surface

[0213] C1 adjacent group

[0214] C2 away from group

[0215] G Gate

[0216] n Total number of teeth in adjacent groups

[0217] Z Total number of chain teeth.

Claims

1. A zipper, characterized in that: The slide fastener comprises a pair of chain straps (2) and a slider (3), wherein the slider (3) opens and closes the pair of chain straps (2) and can stop the pair of chain straps (2) at a position relative to the pair of chain straps (2). The pair of said tooth chain belts (2) comprises: a pair of belts (4) extending in the front-to-back direction and facing each other in the left-to-right direction; a pair of chain tooth rows (5L) consisting of a plurality of chain teeth (5, 5b) fixed along the opposite side edges of the pair of said belts (4); and an opening piece (6, 6a) comprising a pair of opening piece pieces (61, 61a, 62, 62a) respectively fixed to one end portion of the pair of said belts (4) in the front-to-back direction, so that the opening piece piece (61, 61a) on one side and the chain tooth rows (5L) on one side can be inserted and pulled out relative to the slider (3), The slider (3) comprises: a slider body (11) which engages and disengages a pair of the chain tooth rows (5L); and a stop claw (12) which stops the position relative to the pair of the chain tooth rows (5L), wherein a claw tip (21) as one end of the stop claw (12) descends inside the slider body (11) and contacts the chain teeth (5, 5b). At least one of the chain tooth rows (5L) with which the claw tip (21) contacts is composed of a plurality of types of chain teeth (5, 5b), and is classified into a neighboring group (C1) and a distant group (C2), wherein the neighboring group (C1) is a collection of the chain teeth (5, 5b) that are adjacent to the opening member (6, 6a) and counted from the opening member (6, 6a) to the nth, and the distant group (C2) is a collection of the chain teeth (5, 5b) from the opening member (6, 6a) to the n+1th and thereafter. In response to the impact applied to the link elements (5, 5b) and the stop claw (12) that come into contact with each other in the slider (3) when a pulling force is applied from the slider (3) to one of the link element rows (5L), the link elements (5, 5b) constituting the distant group (C2) are provided with strong link elements (8, 8b) of a type that strengthens the impact compared with the link elements (5, 5b) constituting the adjacent group (C1). All of the fastener elements (5, 5b) constituting the adjacent group (C1) are weak fastener elements (9, 9a, 9b, 9c) of a type that weakens impact compared to the strong fastener elements (8, 8b), Here, n is an integer greater than or equal to 1.

2. The zipper according to claim 1, characterized in that: n is an integer equal to or smaller than half of the total number of the fastener elements (5, 5b) constituting the fastener element row (5L), or an integer equal to or smaller than the nearest half of the total number of the fastener elements (5, 5b) constituting the fastener element row (5L).

3. The slide fastener according to claim 1 or 2, characterized in that: n is less than or equal to 10.

4. The slide fastener according to any one of claims 1 to 3, characterized in that: The direction in the front-to-back direction that moves the slider (3) away from the opening member (6, 6a) is defined as the front direction, The trajectory of the claw tip (21) of the stopping claw (12) passing above the pair of fastener element rows (5L) is defined as a claw trajectory (t). For the corner between the upper surface and the front surface in the link tooth (5, 5b) and directly below the claw trajectory (t), the surface of the corner of the weak link tooth (9, 9a, 9b, 9c) is a lowered angle surface (92, 92a, 92b, 92c) that is lower than the surface of the corner of the strong link tooth (8, 8b).

5. The zipper according to claim 4, characterized in that: The decreasing angle surfaces (92, 92a, 92b, 92c) decrease toward the front.

6. The slide fastener according to claim 5, characterized in that: The angle reduction surfaces (92, 92a, 92b, 92c) are curved surfaces that are curved in a state of bulging in an arc shape.

7. The slide fastener according to any one of claims 1 to 6, characterized in that: The direction in the front-to-back direction that moves the slider (3) away from the opening member (6, 6a) is defined as the front direction, The trajectory of the claw tip (21) of the stopping claw (12) passing above the pair of fastener element rows (5L) is defined as a claw trajectory (t). For the front part of the upper surface of the coupling element (5) and directly below the claw track (t), the weak coupling element (9, 9a, 9b, 9c) is a forward inclined surface (93, 97) that decreases toward the front.

8. The slide fastener according to any one of claims 1 to 7, characterized in that: The direction in the front-to-back direction that moves the slider (3) away from the opening member (6, 6a) is defined as the front direction, The trajectory of the claw tip (21) of the stopping claw (12) passing above the pair of fastener element rows (5L) is defined as a claw trajectory (t). For the entire area directly below the claw track (t) on the upper surface of the coupling element (5, 5b), the upper surface (90) of the weak coupling element (9, 9a, 9b, 9c) is lower than the upper surface (80) of the strong coupling element (8, 8b).

9. The slide fastener according to claim 8, characterized in that: In the upper surface (90) of the weak link element (9, 9a, 9b, 9c), the entire area from directly below the claw trajectory (t) to the direction opposite to the belt (4) is a slope (91) toward the end that decreases as it moves toward the side opposite to the belt (4).

10. A method for manufacturing a fastener tape for a slide fastener, the method being a method for manufacturing a fastener tape for use in a slide fastener according to any one of claims 1 to 9, characterized in that: Including the following processes: A first injection molding step of injection molding the strong link elements (8, 8b) on the belt (4); A strong fastener element removal process of forming a removed portion (4b) on the belt (4) by removing the strong fastener element (8) from a portion of the belt (4); as well as A second injection molding step is performed for the belt (4) to form the opening piece pieces (61, 62) and the weak link element (9) by injection molding in a region including the removed portion (4b).

11. The method for manufacturing a fastener tape for a slide fastener according to claim 10, characterized in that: The second injection molding step is to injection mold the opening piece pieces (61, 62) after the weak fastener element (9) is injection molded.

12. The method for manufacturing a fastener tape for a slide fastener according to claim 10, characterized in that: The second injection molding step simultaneously injection molds the weak link element (9) and the opening piece pieces (61, 62).

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