WO2010032331A1

WO2010032331A1 - Concealed slide fastener

Info

Publication number: WO2010032331A1
Application number: PCT/JP2008/067111
Authority: WO
Inventors: 二郎野崎; 賢志堂野; 博史石坂
Original assignee: Ykk株式会社
Priority date: 2008-09-22
Filing date: 2008-09-22
Publication date: 2010-03-25
Also published as: TW201012409A; JPWO2010032331A1; CN102076238B; JP5220116B2; CN102076238A

Abstract

In the inventive concealed slide fasteners (1, 21, 31, 41), sewing of fastener elements (10, 10', 32, 42, 52) is carried out by a first sewing thread (8) for sewing first and second legs (11, 12, 61, 62) to a fastener tape (2) and by a second sewing thread (9) for sewing the second legs (12, 62) to the fastener tape (2) on the side closer to the meshing heads (13, 63) than the first sewing thread (8), sewing of the second legs (12, 62) is carried out by double lock sewing by the needle thread (9a) and the looper thread (9b) of the second sewing thread (9), and holding grooves (15, 15', 65) for receiving and holding the looper thread (9b) at a position closer to the fastener tape (2) than the surfaces (12a, 62a) of the second legs (12, 62) facing the first legs are formed on the surfaces (12a, 62a) facing the first legs. When the right and left element lines (3) are meshed, they are meshed stably by reducing interference of the meshing heads (13, 63) of one fastener elements (10, 10', 32, 42, 52) with a crossing portion (7) by double lock sewing of the sewing thread (9) for sewing the other fastener elements (10, 10', 32, 42, 52), and excellent concealability can be maintained even if the fastener tape (2) is subjected to a lateral pulling force under a meshed state by preventing the right and left element lines (3) from being exposed from between the elements of the U-shaped folding portion (2c) of fastener tape (2).

Description

Hidden slide fastener

The present invention relates to a hidden slide fastener having an improved concealing property that makes the element row invisible from the tape surface side when the left and right element rows are engaged.

Conventional slide fasteners include a normal type slide fastener in which the engaged left and right element rows are exposed on the tape surface of the fastener tape, and a hidden type slide fastener that hides the engaged left and right element rows invisible (hidden slide fastener). There are two main types. Among them, the hidden slide fastener is preferably used for products such as various clothes and shoes taking advantage of the hiding property of not hindering the design of the product. In recent years, the seat for seats of automobiles and trains is used. It has also been used for covers.

The invention relating to such a hidden slide fastener is disclosed in Japanese Patent Publication No. 45-22687 (Patent Document 1), Japanese Patent Publication No. 55-16642 (Patent Document 2), and Japanese Patent Publication No. 56-43721 (Patent Document 3). Is disclosed.

For example, in the hidden slide fastener described in Patent Document 1, a zigzag continuous fastener element is sewn to an element mounting portion of a fastener tape with its meshing head directed to the tape main portion side of the fastener tape. Has been.

Further, as shown in FIG. 16, the hidden slide fastener 71 has a fastener tape 73 folded in a U-shape in the vicinity of the element row 72 so that the left and right element rows 72 can be engaged with each other. The meshing head portion 74 a protrudes from the fastener tape 73.

Each fastener element 74 in the element row 72 includes a meshing head 74a, first and

second leg portions

74b and 74c extending from the meshing head 74a, and a first leg 74b or a first of the adjacent fastener elements 74. The second leg portion 74c is in contact with the element attachment portion 73a of the fastener tape 73, and the first leg portion 74b is separated from the element attachment portion 73a. Arranged in position.

Further, the element row 72 includes the first leg portion 74b, the core cord 75, and the second leg portion 74c in a state where the core cord 75 is inserted between the first leg portion 74b and the second leg portion 74c. By sewing to the fastener tape 73 with one sewing thread 76, and sewing the second leg 74c to the fastener tape 73 with the second sewing thread 77 disposed closer to the meshing head 74a side than the first sewing thread 76. Sewn.

In such a hidden slide fastener 71 of Patent Document 1, not only the element row 72 is sewn by the first sewing thread 76 but also the U-shaped bent portion 73 b of the fastener tape 73 by the second sewing thread 77. It is sewn in the vicinity. For this reason, when the left and right element rows 72 are meshed, the U-shaped bent portions 73b of the left and right fastener tapes 73 are brought close to or in contact with each other to prevent the meshed left and right element rows 72 from being seen from the tape surface side. be able to.

Next, in the hidden slide fastener described in Patent Document 2, each independent fastener element is in a state where the fastening head is directed to the element mounting portion of the fastener tape and the meshing head is directed to the tape main portion side of the fastener tape. Sewn. Further, the fastener tape is bent in a U shape in the vicinity of the element row, and the meshing head of the fastener element protrudes from the fastener tape.

Each fastener element in the hidden slide fastener has a meshing head and first and second legs extending from the meshing head. Each fastener element has a position where the first leg and the second leg are on the meshing head side in a state where the first leg contacts the element mounting and the second leg is separated from the element mounting. Is sewn by being sewn to the fastener tape by double ring stitching.

Also, in Patent Document 2, a connecting thread that connects each fastener element and its adjacent fastener element is inserted into the end of the first and second leg portions opposite to the meshing head. Furthermore, each fastener element has a triangular protrusion projecting in the tape length direction from one side edge of the first leg portion, and a notch (notch portion) recessed in a triangular shape on the other side edge. And the protrusion or notch of the fastener element and the notch or protrusion of the adjacent fastener element are fitted and engaged.

According to such a hidden slide fastener of Patent Document 2, the fastener element and the adjacent fastener element are fitted and engaged with each other by the protrusion and notch formed on the first leg portion of each fastener element. For this reason, for example, even when the left and right element tapes are engaged, even if the left and right fastener tapes receive a lateral pulling force in the tape width direction, the position of each fastener element is prevented from shifting in the tape width direction. The element is prevented from being exposed between the left and right fastener tapes.

Similarly to Patent Document 2, the hidden slide fastener described in Patent Document 3 is sewn to the element mounting portion with the single fastener element facing the main part of the fastener tape, Further, the fastener tape is bent into a U shape, and the meshing head of the fastener element protrudes from the fastener tape.

Each fastener element has a meshing head and first and second legs extending from the meshing head, and the first leg contacts the element mounting portion, and the second leg Are separated from the element mounting portion, and only the first leg portion is sewn to the fastener tape with a sewing thread (stitch) at a position on the meshing head side.

Further, the second leg portion end portion of the fastener element in Patent Document 3 has a protruding portion protruding in a direction approaching the first leg portion or a direction separating from the first leg portion. Further, the slider inserted through the element row is provided with a groove portion in the element guide path into which the protruding portion can be inserted.

According to such a hidden slide fastener of Patent Document 3, the slider slides along the element row in a state in which the protruding portion formed on the fastener element is fitted in the groove provided in the slider. Thereby, since it can suppress that a slider, a fastener tape, and a sewing thread | yarn contact, the friction when a slider slides is suppressed. Therefore, the slidability of the slider is improved, and it is possible to prevent the slider and the fastener tape from being damaged when the slider is slid.
Japanese Examined Patent Publication No. 45-22687 Japanese Patent Publication No.55-16642 Japanese Examined Patent Publication No. 56-43721

The hidden slide fastener 71 described in Patent Document 1 (see FIG. 16) includes an element row 72 and a first sewing thread 76 for sewing the first leg 74b, the core string 75, and the second leg 74c. The second sewing thread 77 is sewn to the fastener tape 73 with only the second leg 74c sewn on the side of the meshing head 74a. However, in the hidden slide fastener 71, for example, when the left and right element rows 72 are meshed, the second sewing thread 77 sewn on the fastener element 74 of one element row 72 is replaced by the other fastener element 74. Since it is arranged at a position where it can easily interfere with the meshing head 74a, the meshing of the left and right fastener elements 74 is hindered by the second sewing thread 77, and the fastener elements 74 may not be securely meshed.

In addition, when each fastener element 74 is sewn by, for example, the main sewing of the second sewing thread 77, there is a problem in the strength of the seam, and it is inferior in stretchability as compared with the double ring stitch described later. There were also drawbacks.

On the other hand, when each fastener element 74 is sewn by double ring stitching of the second sewing thread 77, it has the advantage of excellent seam strength and excellent stretchability. The crossing portion where the double thread stitch needle thread and the looper thread cross each other is formed.

This crossing portion easily interferes with the meshing head 74a of the fastener element 74 that becomes the meshing partner when the left and right element rows 72 are meshed. The element rows 72 are pressed in directions away from each other. For this reason, a gap is easily generated between the U-shaped bent portions 73 b of the left and right fastener tapes 73.

In particular, in the hidden slide fastener 71 of Patent Document 1, for example, when the left and right fastener tapes 73 receive a lateral pulling force in the tape width direction when the element row 72 is engaged, the position of the second sewing thread 77 becomes the fastener tape. The U-shaped bent portion 73b of 73 shifts to the connecting portion 74d side of the fastener element 74, and there is a possibility that a gap is easily formed between the U-shaped bent portions 73b of the left and right fastener tapes 73.

When a gap is formed between the U-shaped bent portions 73b of the left and right fastener tapes 73 in this way, the meshed left and right element rows 72 are exposed to the tape surface side through the gap, so that Patent Document 1 is disclosed. The hidden slide fastener 71 has a problem that excellent concealability cannot be stably maintained.

The hidden slide fastener described in Patent Document 2 is such that when the left and right fastener tapes are subjected to lateral pulling force due to the protrusions and notches formed in each fastener element, the position of the fastener element itself is in the tape width direction. Prevents slippage.

However, since the hidden slide fastener has the fastener element sewn so that the sewing thread straddles the second leg portion away from the fastener tape, the fastener element is not firmly fixed by the sewing thread. Therefore, when the fastener tape receives a lateral pulling force, the position of the sewing thread is likely to shift. In addition, since the sewing thread is pulled by the fastener tape, the fastener element rotates in a direction to return the tape portion of the fastener tape that is bent into a U shape. For this reason, the hidden slide fastener has a problem that a large gap is easily formed between the U-shaped bent portions of the left and right fastener tapes.

The hidden slide fastener described in Patent Document 3 is the same as Patent Document 1 described above, although the first leg portion that is in contact with the fastener tape of each fastener element is sewn and fixed to the fastener tape with a sewing thread. In addition, when the left and right element rows are meshed, the sewing thread sewn on one fastener element may interfere with the meshing head of the other fastener element, and the left and right fastener elements may not mesh securely. .

In particular, when the fastener element is sewn by the double ring stitch of the sewing thread, the intersection of the double thread stitch needle thread and the looper thread is the meshing head of the fastener element as in the above-mentioned Patent Document 1. Therefore, the engagement of the fastener elements is further worsened, and a gap is easily generated between the U-shaped bent portions of the left and right fastener tapes.

Moreover, in the hidden slide fastener of Patent Document 3, when the left and right fastener tapes receive a lateral pulling force when the element row is engaged, the position of the sewing thread is changed from the engagement head side of the fastener element to the leg end side. There was also a problem that the gap formed between the U-shaped bent portions of the left and right fastener tapes was easily increased.

The present invention has been made in view of the above-described conventional problems. A specific object of the present invention is to sew the engagement head of one fastener element and the other fastener element when engaging the left and right element rows. Reduces interference with the sewing thread to be worn (especially the intersection of the sewing thread by double ring stitching) and provides stable meshing, and even if the fastener tape receives lateral pulling force during meshing, the left and right elements It is an object of the present invention to provide a hidden slide fastener capable of maintaining excellent concealability by preventing the rows from being exposed between the U-shaped bent portions of the fastener tape.

In order to achieve the above object, the hidden slide fastener provided by the present invention has, as a basic configuration, a plurality of engagement heads and first and second leg portions that branch out from the engagement heads. The fastener element has a pair of left and right fastener tapes having a tape main part and an element attachment part. The second leg part is brought into contact with the element attachment part and the meshing head is directed to the tape main part. A pair of left and right fastener stringers sewn along the length direction of the tape in a state where the first and second fastener elements are sewn to the element attachment portion. , The second sewing thread is sewn to the element mounting portion on the side of the meshing head with respect to the first sewing thread. A hidden slide fastener in which the left and right element rows are engaged by protruding the left and right engaging heads from the fastener tape in a state where the fastener tape is bent in a U shape in the vicinity of the element rows. And a concave holding groove for receiving and holding the second sewing thread is formed on the surface of the second leg facing the first leg, and the second sewing thread is formed between the adjacent fastener elements. In the position, the most important feature is that the second leg portion of the fastener tape is arranged close to or in contact with the tape surface with which the second leg portion is in contact.

In the hidden slide fastener according to the present invention, the sewing of the second leg portion is performed by double ring stitching of the second sewing thread, and the holding grooves are all the second sewing straddling the second leg portion. It is preferable that the yarn is accommodated and held. The holding groove is preferably formed deeper than the cross-sectional diameter of the second sewing thread.

Furthermore, in the hidden slide fastener of the present invention, it is preferable that the dimension of the holding groove in the tape length direction is set smaller than the dimension of the meshing head in the tape length direction. It is preferable that the leg portion has a concave groove formed continuously from the holding groove on an element facing surface facing the adjacent fastener element.
Furthermore, it is preferable that the second leg portion has a projecting portion projecting in the tape length direction on the element facing surface of the meshing head side end portion.

In such a hidden slide fastener of the present invention, the fastener element is preferably a single fastener element in which each fastener element is independently formed. In this case, the first leg of the single fastener element adjacent to each other is provided. It is preferable that the parts and / or the second leg parts are connected by a connecting thread.
The fastener element may be a continuous fastener element in which fastener elements are continuously formed in a zigzag shape.

The fastener element of the hidden slide fastener according to the present invention has the first and second leg portions sewn by the first sewing thread and the second leg portion meshed by the second sewing thread more than the first sewing thread. It is sewn at the position on the head side. Further, a holding groove is formed on the first leg facing surface of the second leg of each fastener element, and the second sewing thread is accommodated and held in the holding groove.

With such a hidden slide fastener of the present invention, the second sewing thread is reliably guided and received and held in the holding groove when the process of sewing the second leg portion with the second sewing thread is performed. For this reason, the second sewing thread can be stably disposed at a predetermined position with respect to the fastener element, and the position of the second sewing thread can be stably maintained.

As a result, the sewing of the fastener elements can be performed stably and reliably, and the second sewing thread can be applied to the fastener tape even if the fastener tape receives a lateral pulling force when the left and right element rows are engaged. It is possible to reliably prevent the position from being shifted due to the pulling.

Furthermore, since the second sewing thread is accommodated and held in the holding groove of the fastener element, the second sewing thread is more fixed in the fastener tape than the conventional hidden slide fastener. It arrange | positions in the position close | similar to the tape surface which contacts 2 leg parts, or the position which contact | connected the tape surface.

Here, the second sewing thread is arranged close to or in contact with the tape surface means that the second sewing thread, particularly the crossing portion of the second sewing thread, is positioned at the position between the adjacent fastener elements. The state arrange | positioned from a 2nd leg part rather than a part is said, and the state where the crossing part of a 2nd sewing thread is arrange | positioned in the tape surface side rather than the center position of an element meshing head is said. In this case, it is preferable that the center of the intersecting portion of the second sewing thread is disposed on the tape surface side with respect to the first leg facing surface of the second leg portion at a position between the adjacent fastener elements.

Thereby, for example, when the left and right element rows are meshed, the interference between the second sewing thread sewn on one element row and the meshing head of the other element row serving as the mating partner can be reduced. it can. This prevents the meshing of the left and right element rows from becoming worse due to interference between the sewing thread (especially the intersection of the sewing thread) and the meshing head of the fastener element, as in the case of a conventional hidden slide fastener. In addition, it is possible to prevent a gap from being formed between the U-shaped bent portions of the left and right fastener tapes when the left and right element rows are engaged.

Further, as described above, the hidden slide fastener of the present invention can prevent the position of the second sewing thread from shifting when the left and right fastener tapes receive a lateral pulling force, and can sew one element row. The interference between the second sewing thread and the meshing head of the other element row to be meshed with each other is reduced.

For this reason, for example, even if the left and right fastener tapes are subjected to a lateral pulling force when the left and right element rows are engaged, the gap formed between the U-shaped bent portions of the fastener tape is less than the conventional hidden slide fastener. Can be significantly reduced. Accordingly, the left and right element rows engaged with each other from the gap are hardly visible to the outside, and excellent concealability can be stably maintained.

In such a hidden slide fastener of the present invention, the second leg portion is sewn by double ring stitching of the second sewing thread, and all the second sewing threads are held by the holding groove straddling the second leg portion. The second sewing thread is arranged at a position closer to or in contact with the tape surface of the fastener tape by being accommodated and held and the holding groove being formed deeper than the cross-sectional diameter of the second sewing thread. can do. For this reason, when the left and right element rows are in a meshed state, interference between the second sewing thread and the meshing head of the fastener element can be further reduced.

Further, in the present invention, the ball-shaped crossing portion of the second sewing thread can be obtained by setting the dimension of the holding groove in the tape length direction smaller than the dimension of the meshing head in the tape length direction. It can be arranged at a position closer to or in contact with the tape surface of the fastener tape.

In this case, the second leg portion has a recessed groove formed continuously from the holding groove on the element facing surface facing the adjacent fastener element. Thereby, the dimension of the holding groove in the tape length direction can be easily made smaller than the dimension of the meshing head in the tape length direction.

Furthermore, in this invention, the said 1st and 2nd leg part has the protrusion part which protrudes in a tape length direction in the element opposing surface of the meshing head side edge part. By having such a protrusion, even if the fastener tape receives a lateral pulling force when the left and right element rows are in a meshed state, the fastener element and the protrusion formed on the mating fastener element interfere with each other. The fastener element can be prevented from rotating in such a direction as to return the U-shaped bent portion of the fastener tape straight. For this reason, it can prevent reliably that a clearance gap produces between the U-shaped bending part of a right-and-left fastener tape resulting from rotation of a fastener element, and can further improve the concealment property of a hidden slide fastener.

Furthermore, in the present invention, the fastener element is a single fastener element in which each fastener element is independently formed. As a result, the left and right element rows can be stably meshed, and excellent concealability can be stably secured and maintained.

In this case, the first leg portions and / or the second leg portions of the single fastener elements adjacent to each other are connected by a connecting thread. Thereby, for example, even when the first sewing thread or the second sewing thread is broken, it is possible to prevent the single fastener element from being scattered and to maintain the position of the fastener element stably.

Alternatively, the fastener element may be a continuous fastener element in which fastener elements are continuously formed in a zigzag shape. Since the fastener element is composed of a zigzag continuous fastener element, the slide fastener of the present invention can stably mesh the left and right element rows and stably ensure excellent concealment. Can be maintained.

FIG. 1 is an external view of a hidden slide fastener according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of an essential part showing an enlarged element row of the hidden slide fastener. FIG. 3 is a front view showing a state immediately after forming the element row. FIG. 4 is an explanatory view for explaining a process of sewing the formed element row. FIG. 5 is a partial cross-sectional view showing a part of the fastener element in cross section in order to show the first sewing thread and the second sewing thread of the hidden slide fastener. FIG. 6 is a cross-sectional view of the main part for explaining the position of the ball-shaped intersection of the second sewing thread in the hidden slide fastener. FIG. 7 is a cross-sectional view showing a state where the left and right element rows are not engaged with each other in the hidden slide fastener. FIG. 8 is a cross-sectional view of the main part showing a state in which the left and right element rows are engaged with each other in the hidden slide fastener. FIG. 9 is an enlarged cross-sectional view illustrating a main part of the hidden slide fastener according to the second embodiment of the present invention in which the left and right element rows are engaged with each other. FIG. 10 is a main part external view showing an external appearance of an element row in the hidden slide fastener according to the third embodiment of the present invention. FIG. 11 is a partial cross-sectional view showing a part of the fastener element in cross section in order to show the first sewing thread and the second sewing thread of the hidden slide fastener. FIG. 12 is a cross-sectional view of the main part for explaining the position of the ball-shaped intersection of the second sewing thread in the hidden slide fastener. FIG. 13 is an external view of a main part showing an element row in an engaged state in a hidden slide fastener according to Embodiment 4 of the present invention. FIG. 14 is a cross-sectional view showing a meshed state of the hidden slide fastener. FIG. 15: is a principal part perspective view which shows only the fastener element in the hidden slide fastener which concerns on Example 5 of this invention. FIG. 16 is a cross-sectional view of a main part showing a conventional hidden slide fastener.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hidden slide fastener 2 Fastener tape 2a Tape main part 2b Element attachment part 2c U-shaped bending part 3 Element row | line | column 4 Fastener stringer 5 Slider 7 Intersection part 8 1st sewing thread 8a 1st needle thread 8b 1st looper thread 9, 9 'Second sewing thread 9a Second needle thread 9b

Second looper thread

10, 10' Fastener element 11 First leg 11b Element facing surface 12 Second leg 12a First leg facing surface 12b Element facing surface 13 Meshing head 14 First sewing

thread holding groove

15, 15 ′ Second sewing thread holding groove 16 Linking thread 21 Hidden slide fastener 31 Hidden slide fastener 32 Fastener element 33 Protruding portion 34 Concave groove 41 Hidden slide fastener 42 Fastener element 43 Protruding portion 52 Fastener element 61 First leg portion 62 Second leg portion 62a First leg facing surface 63 Interlocking head portion 64 Connecting portion 65 Second sewing thread holding groove

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings by way of examples. The present invention is not limited to the embodiments described below, and various modifications are possible as long as they have substantially the same configuration as the present invention and have the same effects. Is possible.

In each of the following examples, the length direction of the fastener tape is defined as the front-rear direction, the tape width direction of the fastener tape is defined as the left-right direction, and the tape front and back direction of the fastener tape is defined as the up-down direction. Give an explanation.

FIG. 1 is an external view of a hidden slide fastener according to Embodiment 1 of the present invention, and FIG. 2 is an external view of a main part showing an external appearance of an element row of the hidden slide fastener. FIG. 3 is a front view showing a state immediately after forming the element row, and FIG. 4 is an explanatory view for explaining a process of sewing the formed element row.

Further, FIG. 5 is a partial cross-sectional view showing a part of the fastener element in section in order to show the first sewing thread and the second sewing thread sewn on the fastener element of the hidden slide fastener. It is principal part sectional drawing explaining the position of the ball-shaped intersection part of the 2nd sewing thread in the same hidden slide fastener.

The hidden slide fastener 1 according to the first embodiment includes a pair of left and right fastener stringers 4 in which a plurality of individual fastener elements 10 are sewn to the left and right fastener tapes 2 to form an element row 3, and left and right element rows. And a slider 5 for meshing and separating 3.

The fastener stringer 4 includes a pair of left and right fastener tapes 2 and an element row 3 sewn on the fastener tape 2. The fastener tape 2 has a tape main part 2a and an element attachment part 2b formed on the side edge of the tape main part 2a and to which the element row 3 is sewn. The element row 3 is formed by sewing a plurality of individual synthetic resin single fastener elements 10 that are formed independently of each other with first and

second sewing threads

8 and 9 at predetermined intervals. Yes.

In the first embodiment, as shown in FIG. 2, each fastener element 10 includes a meshing head 13, and first and

second leg portions

11 and 12 that are branched and extended from the meshing head 13. And the second leg 12 is in contact with the element attaching part 2b of the fastener tape 2, and the first leg 11 is sewn to the element attaching part 2b in a posture separated from the fastener tape 2. Yes.

The first sewing thread 8 runs on the surface of the fastener tape 2 on the side opposite to the surface with which the fastener element 10 contacts, and penetrates the fastener tape 2 at a position between the fastener elements 10 and stitches. The first needle thread 8a is formed on the outer surface side of the first leg 11 and the first needle thread 8a is formed at a position between the fastener elements 10 while forming a loop. And a first looper yarn 8b that forms a crossing portion 7 by crossing with the first looper yarn 8b.

Therefore, the first sewing thread 8 is attached to the tip end side of the first and

second leg portions

11 and 12 of the fastener element 10 by double chain stitching of the first needle thread 8a and the first looper thread 8b. It is sewn to the part 2b. At this time, the first looper thread 8b of the first sewing thread 8 moves between the fastener elements 10 while reciprocating so as to straddle the first leg 11 of each fastener element 10 three times as shown in FIGS. The intersecting portion 7 is formed by intersecting with the first needle thread 8a.

The second sewing thread 9 runs on the surface of the fastener tape 2 opposite to the surface with which the fastener element 10 contacts, and penetrates through the fastener tape 2 at a position between the fastener elements 10 (described later). The second needle thread 9a forming the crossing portion 7) and the second leg 12 on the first leg-facing surface 12a side, and forming a second loop at a position between the respective fastener elements 10 while forming a loop. And a second looper yarn 9b that intersects with the needle yarn 9a to form an intersecting portion 7.

Accordingly, the second sewing thread 9 has a meshing head 13 that engages the second leg 12 of the fastener element 10 more than the first sewing thread 8 by double chain stitching of the second needle thread 9a and the second looper thread 9b. It is sewn to the element mounting portion 2b at the side position. At this time, the second looper thread 9b of the second sewing thread 9 crosses the second needle thread 9a between the fastener elements 10 while reciprocating so as to straddle the second leg 12 of each fastener element 10 three times. Yes.

In the present embodiment, the case where the fastener element 10 is sewn by double ring stitching of the first sewing thread 8 and the second sewing thread 9 has been described, but the present invention is not limited to this. The sewing of the fastener element 10 may be performed by main stitching, or may be performed by multiple ring stitching such as single ring stitching or triple ring stitching.

Further, as the second sewing thread 9 is arranged closer to the engagement head 13 side with respect to the fastener element 10, the position of a U-shaped bent portion 2c (described later) of the fastener tape 2 is set to the engagement head 13 side. Therefore, when the left and right element rows 3 are engaged, the left and right fastener tapes 2U-shaped bent portions 2c are sufficiently brought into contact with each other, and the concealing property of the hidden slide fastener 1 can be improved.

Furthermore, in the fastener element 10 of the first embodiment, the first sewing thread 8 is accommodated and held on the outer surface of the first leg portion 11 on the front end portion side (the surface opposite to the second leg portion facing surface). A concave first sewing thread holding groove 14 is formed. In the first embodiment, when the first sewing thread 8 sews the plurality of fastener elements 10, the first looper thread 8b straddles the first leg portion 11 of each fastener element 10 three times. The groove 14 has a groove width wider than the cross-sectional diameter of three looper yarns and a groove depth of one looper yarn so as to accommodate and hold the first looper yarns 8b of three pieces in parallel. It is formed larger than the cross-sectional diameter.

Further, the second leg portion 12 of each fastener element 10 has a first leg portion facing surface 12a (inner surface) at a position closer to the meshing head 13 than the portion where the first sewing thread is sewn. A concave second sewing thread holding groove 15 for receiving and holding the sewing thread 9 is formed. Similarly to the first sewing thread holding groove 14, the second sewing thread holding groove 15 has a groove width of three looper threads so that three second looper threads 9b can be accommodated and held in parallel. The cross-sectional diameter is wider and the groove depth is larger than the cross-sectional diameter of one looper yarn.

In Example 1, the dimension in the tape length direction of the second sewing thread holding groove 15 is set to be approximately the same as the dimension in the tape length direction of the meshing head 13 of the fastener element 10. . Further, in the fastener element 10 of the first embodiment, in addition to the first sewing thread holding groove 14 and the second sewing thread holding groove 15, the outer surface of the first leg portion 11 on the side of the meshing head and the second leg portion facing surface. A plurality of grooves are also formed on the outer surface of the second leg 12 (the surface opposite to the first leg-facing surface 12a), but the present invention is not limited to this, and a fastener It is possible to arbitrarily change the shape of the element.

Further, the first legs of the plurality of fastener elements 10 are provided at the distal ends of the first and

second leg portions

11 and 12 of each fastener element 10 with a predetermined space between the fastener elements 10 and the adjacent fastener elements 10. A connecting thread 16 that connects the portions 11 or the second leg portions 12 is inserted. Since such a connecting thread 16 is inserted into each fastener element 10 forming the element row 3, for example, even when the first sewing thread 8 or the second sewing thread 9 is cut or unfastened, the fastener element 10 Can be prevented from falling off the fastener tape 2.

Here, a method for manufacturing the hidden slide fastener 1 of the first embodiment will be described.
In the manufacture of the hidden slide fastener 1 of the first embodiment, first, as shown in FIG. 3, a plurality of single pieces having a predetermined shape having the first sewing thread holding groove 14 and the second sewing thread holding groove 15 as described above. The fastener element 10 is injection molded in a form in which the first leg portion 11 and the second leg portion 12 are opened. Therefore, the fastener element 10 immediately after the injection molding has the first leg portion 11 and the second leg portion 12 formed in a symmetrical shape with the meshing head 13 as the center.

At this time, the connecting thread 16 that connects the first and

second leg portions

11, 12 of each fastener element 10 can be appropriately meshed with the fastener element 10 of the mating counterpart between the fastener elements 10. In a state in which is provided, the fastener element 10 is integrally molded by an insert molding method.

Next, the second leg portions 12 of the plurality of fastener elements 10 injection-molded are directed to the element mounting portion 2b of the fastener tape 2, and the meshing head portion 13 of the fastener element 10 is directed to the tape main portion 2a side of the fastener tape 2. In this state, it is arranged along the tape length direction. Next, the second looper thread 9 b of the second sewing thread 9 is guided to the second sewing thread holding groove 15 of the second leg part 12, and the second leg part 12 is subjected to double ring stitching of the second sewing thread 9. Sew.

When sewing with the second sewing thread 9, the second looper thread 9 b is guided to the second sewing thread holding groove 15 of the second leg portion 12, so that the second sewing thread 9 is moved with respect to the fastener element 10. Therefore, the fastener element 10 can be securely sewed into the predetermined position with respect to the fastener element 10, and the second leg portion 12 is also sewn. It can be maintained stably.

Thereafter, as shown in FIG. 4, the first leg portion 11 is rotated so that the fastener element 10 is folded around the meshing head portion 13, and the first leg portion 11 is moved to the first leg of the second leg portion 12. It overlaps with the part opposing surface 12a side. Further, after the first leg portion 11 is superimposed on the second leg portion 12, the first looper yarn 8 b of the first sewing thread 8 is guided to the first sewing thread holding groove 14 of the first leg portion 11, and the fastener The first and

second leg portions

11 and 12 of the element 10 are sewn by double ring stitching of the first sewing thread 8. As a result, as shown in FIGS. 5 and 6, the plurality of single fastener elements 10 are sewn to the element mounting portion 2 b by the first and

second sewing threads

8 and 9, thereby forming the element row 3.

After the fastener element 10 is sewn with the first and

second sewing threads

8 and 9, the main tape portion 2a of the fastener tape 2 is folded back to the element mounting portion 2b side so that the fastener tape 2 is brought close to the element row 3 Bend along a U-shape. Thereby, the fastener stringer 4 in a state where the meshing head 13 of each fastener element 10 protrudes from the U-shaped bent portion 2c of the fastener tape 2 is obtained.

Then, such a fastener stringer 4 is produced in a pair of left and right, and the slider 5 is inserted into the element row 3 of the fastener stringer 4 to manufacture the hidden slide fastener 1 of the first embodiment.

In the hidden slide fastener 1 of the first embodiment obtained as described above, the second looper thread 9b of the second sewing thread 9 is replaced by the second sewing thread holding groove 15 of each fastener element 10 as shown in FIG. The second sewing thread 9 is reliably prevented from shifting from a predetermined position, for example, when the hidden slide fastener 1 is sewn to the product or when the hidden slide fastener 1 is used. be able to.

Further, the second looper thread 9b of the second sewing thread 9 straddling the second leg part 12 is accommodated and held in the second sewing thread holding groove 15 so that the second leg part 12 of the fastener element 10 has a second shape. It arrange | positions in the position near the fastener tape 2 rather than the 1 leg part opposing surface 12a. Further, the groove depth of the second sewing thread holding groove 15 of the fastener element 10 is set to be approximately equal to or larger than the cross-sectional diameter of one second sewing thread 9.

For this reason, the ball-shaped intersection 7 of the second sewing thread 9 formed between the fastener elements 10 when the second looper thread 9b of the second sewing thread 9 intersects the second needle thread 9a is shown in FIG. As shown, for example, it is arranged at a position closer to the tape surface in contact with the second leg portion 12 of the fastener tape 2 than the conventional hidden slide fastener 1 in which the second sewing thread holding groove 15 is not formed. Note that the position of the second sewing thread 9 ′ drawn in phantom in FIG. 6 is the position of the second sewing thread 9 in the conventional hidden slide fastener 1 in which the second sewing thread holding groove 15 is not formed. Show.

In this way, the ball-shaped intersection 7 of the second sewing thread 9 is arranged at a position closer to the tape surface of the fastener tape 2, so that, for example, the slider 5 is slid to move the left and right element rows 3. When meshed, as shown in FIG. 8, the interference between the ball-shaped intersection 7 formed in one element row 3 and the meshing head 13 of the other element row 3 which is a mating partner is reduced. be able to.

In this way, when the element row 3 is meshed, the interference between the ball-shaped intersection 7 and the meshing head 13 is reduced, so that the left and right element rows 3 can be meshed firmly and stably, It can prevent that a clearance gap produces between the U-shaped bending parts 2c of the right-and-left fastener tape 2 resulting from this interference. Therefore, the hidden slide fastener 1 of the first embodiment prevents the exposed left and right element rows 3 from being exposed from between the left and right fastener tapes 2U-shaped bent portions 2c, and stably ensures excellent concealability. be able to.

In the hidden slide fastener 1 of the first embodiment, the second sewing thread 9 is accommodated and held in the second sewing thread holding groove 15 of the fastener element 10 even when a lateral pulling force is applied to the left and right fastener tapes 2. Therefore, the position of the second sewing thread 9 does not shift. Further, when a lateral pulling force is applied to the left and right fastener tapes 2, even if the fastener element 10 tries to rotate in a direction to return the tape portion of the fastener tape 2 that is bent into a U shape, the fastener element 10 Since the meshing head 13 is in contact with the ball-shaped intersection 7 of the second sewing thread 9, the fastener element 10 can be prevented from rotating.

As described above, the hidden slide fastener 1 of the first embodiment has a small interference between the ball-shaped intersection 7 and the meshing head 13 even when a lateral pulling force is applied to the left and right fastener tapes 2, and the second Since it is possible to effectively prevent the displacement of the sewing thread 9 and the rotation of the fastener element 10, the gap formed between the U-shaped bent portions 2 c of the left and right fastener tapes 2 can be made smaller than before. Can be prevented from forming the same gap.

Specifically, for example, in the case of a hidden slide fastener in which the chain width of the fastener chain in the state where the left and right element rows 3 are engaged (the dimension in the tape width direction of the engaged right and left element rows 3) is set to about 5 mm. In the conventional hidden slide fastener 1 in which the second sewing thread holding groove 15 is not formed in the fastener element 10, when the fastener tape 2 receives a lateral pulling force when the left and right element rows 3 are engaged, the left and right fasteners A gap of about 1.5 mm is formed between the U-shaped bent portions 2 c of the tape 2. On the other hand, in the hidden slide fastener 1 of the first embodiment, the left and right fastener tapes 2 are bent in a U-shape even when the fastener tape 2 receives a lateral pulling force when the left and right element rows 3 are engaged. It was confirmed that only a gap of about 1.0 mm was formed between the portions 2c.

As described above, the hidden slide fastener 1 according to the first embodiment has a gap formed between the U-shaped bent portions 2 c of the left and right fastener tapes 2 even when a lateral pulling force is applied to the left and right fastener tapes 2. Since it can be made significantly smaller than the conventional hidden slide fastener 1 or the formation of the same gap can be prevented, excellent concealability can be stably maintained.

Next, the hidden slide fastener according to the second embodiment of the present invention will be described.
Here, FIG. 9 is an essential part cross-sectional view showing an enlarged state in which the left and right element rows are engaged in the hidden slide fastener of the second embodiment.

In the hidden slide fastener 21 according to the second embodiment, the second sewing thread holding groove 15 ′ recessed in the fastener element 10 ′ is replaced with the second sewing thread holding groove 15 of the hidden slide fastener 1 according to the first embodiment. It is formed deeper than the groove depth, and other configurations are basically the same as the hidden slide fastener 1 of the first embodiment.

Therefore, in the second embodiment and in the third to fifth embodiments described below, those having the same configuration as the parts or members described in the first embodiment are denoted by the same reference numerals. Therefore, the description thereof will be omitted.

In the hidden slide fastener 21 according to the second embodiment, the groove depth of the second sewing thread holding groove 15 ′ of the fastener element 10 ′ is about 2.5 times the sectional diameter of one second looper thread 9b. The size is set to be deeper than the hidden slide fastener 1 of the first embodiment. By forming the second sewing thread holding groove 15 ′ deeply in this way, the ball intersection portion 7 of the second sewing thread 9 is positioned closer to the tape surface of the fastener tape 2 than in the first embodiment, and Can be arranged at a position in contact with the tape surface of the fastener tape 2.

For this reason, when the left and right element rows 3 are meshed with each other, interference between the ball-shaped intersection portion 7 formed in one element row 3 and the meshing head 13 of the other element row 3 which is a mating partner is further reduced. Can be reduced. Therefore, the left and right element rows 3 can be meshed more firmly, and the concealing property of the hidden slide fastener 21 can be further improved.

FIG. 10 is a main part external view showing an external appearance of an element row in the hidden slide fastener of the third embodiment. FIG. 11 is a partial cross-sectional view showing a part of the fastener element in cross section in order to show the first sewing thread and the second sewing thread sewn with the fastener element of the hidden slide fastener. It is principal part sectional drawing explaining the position of the ball-shaped intersection part of the 2nd sewing thread in the same hidden slide fastener.

In the second leg portion 12 of each fastener element 32 according to the third embodiment, a concave groove 34 is formed on the element facing surface 12b disposed in the front-rear direction so as to face the adjacent fastener element 32, and the first leg facing surface. It is formed continuously from the second sewing thread holding groove 15 of 12a.

As shown in FIG. 12, each fastener element 32 of the third embodiment has the second sewing for accommodating and holding the second looper thread 9b by forming the concave grooves 34 in both the front and rear element facing surfaces 12b. The dimension of the thread holding groove 15 in the tape length direction is shorter than the dimension of the meshing head 13 in the tape length direction. For this reason, the space | interval between the 2nd sewing thread holding grooves 15 of the fastener element 32 adjacent to each other can be ensured long compared with the said Example 1 or Example 2. FIG.

On the other hand, when the second leg portion 12 of the fastener element 32 is sewn to the element mounting portion 2b by double ring stitching of the second sewing thread 9, the second looper yarn 9b traveling between the fastener elements 32 is in a ball-shaped crossing. It is pulled to the fastener tape 2 side by the second needle thread 9a at the position of the portion 7.

For this reason, the second looper thread is formed by forming the concave groove 34 in the element facing surface 12b of the fastener element 32 as described above and increasing the interval between the second sewing thread holding grooves 15 of the adjacent fastener elements 32. When 9b is pulled to the fastener tape 2 side by the second needle thread 9a, the position of the ball intersection portion 7 can be further brought closer to the tape surface side of the fastener tape 2.

Therefore, in the hidden slide fastener 31 of the third embodiment, when the left and right element rows 3 are engaged with each other, the ball-shaped intersection 7 formed in one element row 3 and the other element row 3 that is a mating counterpart. The interference with the meshing head 13 can be further reduced. For this reason, the left and right element rows 3 can be meshed firmly and stably, and the concealing property of the hidden slide fastener 21 can be further improved.

Further, the fastener element 32 of the third embodiment protrudes in the front-rear direction (tape length direction) on the

element facing surfaces

11b, 12b at the meshing head side ends of the first and

second leg portions

11, 12. A portion 33 is provided. The protrusion 33 has a rectangular shape when the fastener element 32 is viewed from the front-rear direction (tape longitudinal direction). Since each fastener element 32 has such a protrusion 33, the position of the second looper thread 9b can be more reliably prevented from shifting to the meshing head side.

Further, since the protruding portion 33 is formed, for example, when the left and right element rows 3 are engaged, the fastener tape 2 receives a lateral pulling force, and the fastener element 32 becomes a U-shaped bent portion of the fastener tape 2. Even if the fastener element 32 collides with the protruding portion 33 on the meshing counterpart side even when trying to rotate in a direction to return 2c straight, it is possible to prevent the fastener element 32 from rotating. For this reason, the clearance gap formed between the U-shaped bending parts 2c of the right and left fastener tape 2 can be made smaller, and the concealment property of the hidden slide fastener 21 can be further improved.

FIG. 13 is a main part external view showing the element row in the engaged state in the hidden slide fastener of the fourth embodiment, and FIG. 14 is a cross-sectional view showing the engaged state of the hidden slide fastener.

The hidden slide fastener 41 of the fourth embodiment is similar to the hidden slide fastener 31 of the third embodiment in that the element-facing surface of the engagement head side end portions of the first and

second leg portions

11 and 12 of each fastener element 42. 11b, 12b has a protruding portion 43 protruding in the front-rear direction (tape length direction).

However, the shape of the protruding portion 43 is different from that of the third embodiment, and when the fastener element 42 is viewed from the tape length direction, the shape of the protruding portion 43 is the first leg portion 11 (or the second leg portion 12). ) From the outer surface to the second leg-facing surface (or the first leg-facing surface 12a), the one surface on the side of the meshing head 13 is on the opposite side (the leg extending end). It is formed in a substantially trapezoidal shape inclined with respect to the other surface.

The hidden slide fastener 41 of the fourth embodiment is basically the same as the hidden slide fastener 31 of the third embodiment, except for the configuration of the protruding portion 43.

In the hidden slide fastener 41 of the fourth embodiment, since the protrusion 43 is formed, for example, when the left and right element rows 3 are in an engaged state (see FIG. 14), the fastener tape 2 exerts a lateral pulling force. Even if it receives, it can suppress that the fastener element 42 rotates so that the U-shaped bending part 2c of the fastener tape 2 may be returned straight.

In particular, the hidden slide fastener 41 of the fourth embodiment is formed so that the protruding portion 43 has a substantially trapezoidal shape as described above when viewed from the tape length direction. When the rotation occurs, the meshing head 13 on the meshing partner side can be appropriately collided with one surface of the projecting portion 43 on the side of the meshing head 13 inclined. For this reason, rotation of the fastener element 42 can be more reliably suppressed, and the gap formed between the U-shaped bent portions 2c of the left and right fastener tapes 2 can be further reduced.

FIG. 15 is a perspective view of the main part showing only the fastener element in the hidden slide fastener of the fifth embodiment.
In the hidden slide fastener of the fifth embodiment, a plurality of single fastener elements 10 in the hidden slide fastener 1 of the first embodiment are continuously formed in a zigzag shape instead of being sewn to the element mounting portion 2b. The fastener element 52 is sewn to the element attachment portion 2b using the first and

second sewing threads

8 and 9 to form an element row.

As shown in FIG. 15, each fastener element 52 includes a meshing head 63, first and

second leg portions

61 and 62 that are branched and extended from the meshing head 63, and adjacent fastener elements. 52 has a connecting portion 64 connected to the first leg portion 61 or the second leg portion 62, the second leg portion 62 is in contact with the element mounting portion 2 b of the fastener tape 2, and the first leg portion 61 is sewn to the element mounting portion 2b in a posture separated from the fastener tape 2.

Further, a concave second sewing thread for accommodating and holding the second sewing thread 9 at a position on the side of the meshing head 63 of the first leg portion facing surface 62a of the second leg portion 62 in each fastener element 52. A holding groove 65 is formed. The second sewing thread holding groove 65 is formed so that the groove width is wider than the sectional diameter of three looper threads and the groove depth is larger than the sectional diameter of one looper thread.

Furthermore, the first sewing thread 8 for sewing the fastener element 52 is arranged on the outer surface side of the first needle thread 8a and the first leg 61, and is formed at a position between the fastener elements 52 while forming a loop. A first looper thread 8b that intersects with the first needle thread 8a to form an intersecting portion 7, and a double loop stitching of the first needle thread 8a and the first looper thread 8b results in a fastener element. The connecting portion side of the first and

second leg portions

61 and 62 of 52 is sewn to the element mounting portion 2b.

The second sewing thread 9 is disposed on the second leg thread 9a and the first leg facing surface 62a side of the second leg 62, and the second needle 9 is formed at a position between the fastener elements 52 while forming a loop. A second looper thread 9b that intersects with the thread 9a to form the crossing portion 7, and a second loop of the fastener element 52 is formed by double ring stitching of the second needle thread 9a and the second looper thread 9b. The leg 62 is sewn to the element mounting portion 2b at a position closer to the meshing head 63 than the first sewing thread 8.

Even in the hidden slide fastener according to the fifth embodiment in which the zigzag continuous fastener element 52 is sewn, the second sewing thread 9b of the second sewing thread 9 is formed on the fastener element 52 by the second sewing thread. Since it is housed and held in the yarn holding groove 65, it is possible to achieve substantially the same effect as that obtained by the hidden slide fastener 1 of the first embodiment.

Claims

A plurality of fastener elements (10, 10) having a meshing head (13, 63) and first and second legs (11, 12, 61, 62) branching out from the meshing head (13, 63). ', 32, 42, 52) is attached to the element mounting portion (2b) of the pair of left and right fastener tapes (2) having the tape main body portion (2a) and the element mounting portion (2b). , 62) are brought into contact with the element mounting portion (2b) and the pair of left and right sides sewn along the tape length direction with the meshing head (13, 63) facing the tape main portion (2a). A plurality of fastener elements (10, 10 ', 32, 42, 52), wherein the first and second leg portions (11, 12, 61, 62) are connected to the element mounting portion. A first sewing thread (8) to be sewn on (2b), and the second leg (12, 62) on the side of the meshing head (13, 63) with respect to the first sewing thread (8). Sewing with the second sewing thread (9) sewn on the mounting part (2b) The left and right engaging heads (13, 63) are projected from the fastener tape (2) in a state where the fastener tape (2) is bent in a U-shape in the vicinity of the element row (3). Hidden slide fasteners (1, 21, 31, 41) in which the left and right element rows (3) mesh with each other by meshing with each other,
A concave holding groove (15, 15 ', 65) for receiving and holding the second sewing thread (9) on the first leg facing surface (12a, 62a) of the second leg (12, 62). Formed,
The second sewing thread (9) is disposed between the adjacent fastener elements (10, 10 ', 32, 42, 52) at the second leg (12, 62) of the fastener tape (2). It is arranged close to or in contact with the tape surface where
Hidden slide fastener characterized by that.
The second leg portions (12, 62) are sewn by double chain stitching of the second sewing thread (9).
The holding groove (15, 15 ′, 65) accommodates and holds all the second sewing threads (9) straddling the second leg (12, 62).
The hidden slide fastener according to claim 1.
The hidden slide fastener according to claim 1 or 2, wherein the holding groove (15, 15 ', 65) is formed deeper than a cross-sectional diameter of the second sewing thread (9).
The tape length direction dimension of the holding groove (15) is set to be smaller than the dimension of the meshing head (13) in the tape length direction. Hidden slide fastener.
The second leg portion (12) is a recess formed continuously from the holding groove (15, 15 ', 65) flange on the element facing surface (12b) flange facing the adjacent fastener element (32, 42) flange. The hidden slide fastener according to claim 4, further comprising a groove (34).
The first leg portion (12) has a projecting portion (33, 43) projecting in the tape length direction on the element facing surface (12b) of the end portion on the meshing head side. The hidden slide fastener according to any one of items 5 to 5.
The fastener element (10, 10 ', 32, 42) is a single fastener element in which each fastener element (10, 10', 32, 42) is independently formed. Hidden slide fastener according to crab.
The first leg portions (11) of the single fastener elements (10, 10 ', 32, 42) adjacent to each other and / or the second leg portion (12) ridges are connected by a connecting thread (16). The hidden slide fastener according to claim 7, wherein the hidden slide fastener is formed.
The hidden slide fastener according to any one of claims 1 to 6, wherein the fastener element (52) is a continuous fastener element in which the fastener element (52) is continuously formed in a zigzag shape.