KR830002132B1 - Slide fasteners - Google Patents

Abstract

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Description

Slide fasteners

1 is a plan view showing an embodiment of the slide fastener of the present invention.

2 is a front view of the II-II line of FIG.

3 and 4 are cross-sectional views taken along lines III-III and IV-IV of FIG. 1, respectively.

5 is a perspective view showing a stitching structure of a serving.

Fig. 6 (a) is a side view of a looped part of needle yarn.

Fig. 6 (b) is a plan view thereof.

7 and 8 are explanatory views of the action of fitting the slider.

9 to 11 are second embodiments of the present invention, in which Figs. 9 and 10 are cross sectional views and Fig. 11 is a longitudinal sectional view.

12 is a plan view showing a modification of the sewing form.

13 is a cross-sectional view showing various examples of the needle thread cross-sectional shape.

A continuous fastener element having a coil shape, a zigzag shape or the like of the present invention is provided on one side of the tape, and the tape is double stitched by a looper yarn disposed on the element side and a needle yarn disposed on the tape side. A sealed slide fastener.

Conventional double stitching is used as a sealing yarn used in a fastener element sealed to tape, such as a service used by the general sewing industry in terms of high speed operation of the sewing machine, sufficient pulling of the thread, stable operation, and stable pulling of the thread. Yarns and multifilament yarns are used. In addition, as these yarns, elastic yarns are used, which are generally not stretched well in view of the above.

On the other hand, the tape used in fasteners is made from cotton to cotton, span to filament yarn, and loom from needle loom to needle loom, and needle loom to warp knit, satisfying higher productivity and strength required by fasteners. In the meantime, the tape is reduced in weight. However, from the standpoint of service and tape adhesion, the tape material has a lower frictional resistance, the fabric has a lower frictional resistance with the service, and the tape has a thinner thickness, resulting in less contact between the service and the tape. Will change. Therefore, when the fastener element is sealed as a flexible service without stretching as described above on the tape forming the material and structure, when the fastener chain is cut because the fixing property between the service and the tape is not sufficient, Needless problems were easy to solve. When the needle was easy to be released, it was inevitably easy for Ruper to be released, and eventually the service was easy to be released. When the service is released, there is a problem that the opening of the occlusal element cannot be opened when the slider is inserted because of insufficient force for pressing the first element of the cutting end and other elements consecutive to the element.

The first object of the present invention is to use a monofilament as a needle yarn and heat-set it, while at the same time the needle yarn is formed by forming a loop-shaped portion having a constriction at the entanglement with the looper yarn. The looping portion of the rear end of the looper yarn is engaged with the constriction portion, and the looper portion connecting the looper line and the front end of the looper yarn is connected into the looped portion of the needle thread. It is to provide a slide fastener which can be dug in tightly and effectively prevents the cutting end of the tape from being loosened, and also allows the fastener chain to be fitted from the rear end of the slider.

切)을 방지한 슬라이드 파스너를 제공하는 데에 있다.A second object of the present invention is to trim the looper yarn due to sliding of the slider as the front face of the looped portion is projected slightly to the front face of the looper yarn or is almost the same plane.

The present invention provides a slide fastener that prevents iii).

The third object of the present invention is to protect the looper yarn and to prevent the trimmer of the looper yarn by reducing the thickness of the fastener as the looper yarns are formed in the element upper part of the present invention to form a service recess groove to be locked in. To provide a slide fastener.

In addition, as another slide fastener adopting double stitching, a looper yarn is disposed on the tape side and the needle yarn is placed on the element side, and a monofilament using only the needle yarn is also proposed. However, the monofilament yarn has a hard property, and if a strong tension is applied at the time of sealing, the needle is easy to shake sideways or break, so that the needle yarn cannot be sufficiently tensioned, and thus, the thread cannot be pulled sufficiently. Moreover, since the taper should be sealed with the lower element placed on the upper side because the looper yarn, that is, the lower thread is the tape shaft, a special one must be used as a guide of the tapes and elements in the sewing machine. At the same time, the model structure of the machine becomes complicated, and the pull of the needle thread is also poor from the model structure of the sewing machine, which makes it difficult to obtain a good slide fastener.

In addition, it is proposed to use monofilament only with the looper yarn or to use the monofilament yarn with the looper yarn and the needle yarn in the arrangement of the looper yarn on the element side. Because of this, there is a drawback of losing flexibility as a fastener, which is difficult to put into practical use. Therefore, a fourth object of the present invention is to obtain a high quality slide fastener while maintaining high productivity without changing the structure of the sewing machine.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. (1) is a tape, (2) is a fastener element on a coil, (3) is a fastener element, and a string is arranged inside the connection inversion part 2a of (2). (4) is a looper yarn disposed on the surface side of the upper portion (2b) of the fastener element (2), (5) is placed on the back side of the tape (1), and the loop is drawn from the corners of the adjacent elements to the surface side. It is a needle yarn that is double stitched by a service composed of this looper yarn (4) and needle yarn (5). As the looper yarn, a multifilament yarn such as polyester or a backing yarn is used, and the needle yarn is a thermoplastic monofilament such as nylon.

The needle thread 5 constitutes a loop-shaped portion 7 at the entangled portion 6 intertwined with the looper thread 4. This loop-shaped portion 7 is formed by the loop portions 8 and 9 at the front and rear of the looper yarn 4 as shown in FIGS. 3 to 6 (a) and 6 (b). Needle thread having a constricted portion 7a which is pulled in opposite directions and bent in the opposite direction, and the rear loop portion 9 adjacent to the looper thread 4 extends over the rear upper tip portion 2b. It entangles with the curved constriction part 7a of the loop-shaped part 7 of (5). The loop portion 8 on the line of the adjacent looper yarn 4 is located above the loop portion 9 which is in contact with the constriction portion 7a of the needle yarn 5, and the needle yarn 5 The connection part 8a of the looper yarn 4 which connects the inside of the loop shape part 7 by the insertion, and connects the adjacent line and back loop parts 8 and 9 is the The inside of the loop-shaped part 7 is inserted, and the loop part 8 and the connection part 8a on this line are in intimate state in the loop-shaped part 7.

Importantly, in the entangled portion 6, each looped portion 7 of the needle yarn 5 has a constriction portion 7a, and the constriction portion 7a has a loop portion behind the looper yarn 4 ( 9) is interposed between the loop-shaped portion 7 and the myocardium 3 to prevent loosening and at the same time, the loop-shaped portion 8 and the connecting portion 8a on the line within the loop-shaped portion 7 are prevented. Is tightly held in place to prevent it from being released.

Moreover, the part 10 which penetrates the core string 3 of the needle thread 5 has a structure which contacted each other by the tension | pulling which the rear loop part 9 of the looper thread 4 pulls. In addition, the upper surface of the loop-shaped portion 7 may be formed to form the expanded portion 11 in the horizontal direction by bending (see also the sixth (b)).

The front part 12 of the loop-shaped part 7 is located on the front part 13 (the upper part 2b of the fastener element 2) of the looper yarn 4 described above, and also on the tape 1 surface side. Slightly protrudes from the height 1 (see Fig. 4). The height 1 is preferably as large as the diameter of the needle thread 5, and at least approximately 0, that is, the front part 12 of the upper part of the roof part 12 and the front part 13 of the looper thread form almost the same plane. There is a need. Thus, what constitutes the loop-shaped part 7 and the front part 12 of the needle thread 5 to the specified height is the looper thread 4 and the needle thread 5 at the time of sealing the fastener element 2. Can be achieved by tension adjustment. That is, the looper yarn 4 is sealed in a planar shape on the upper part 2b of the element (this is called flat stitching) and the looper yarn 4 is formed in a substantially triangular shape on the upper part 2b of the element. The nested sealing method (called triangular sewing) can be performed, and in the case of flat sewing, it is weak to the looper yarn (4), and a strong tension is applied to the needle yarn (5). This can be achieved by applying a strong tension to the woofer yarn 4 and a weak tension on the needle yarn 5. Therefore, in the case of flat sewing, the nodular part 6 of the needle thread 5 is deeply penetrated to the tape side (for example, see Japanese Patent Application Laid-Open No. 48-16441). On the other hand, in the case of triangular sewing, since the tension on the looper is strong, the cross section overlaps in a substantially triangular shape without spreading on the upper leg portion 2b of the element, and the nodular portion 6 of the needle thread 5 is fastened. It is the structure pulled up on the upper deformed part 2b of the element. In the present invention, the tension of the looper yarn 4 is stronger than that of the flat sewing and weaker than that of the triangular sewing, and the tension of the needle thread 5 is weaker than that of the flat sewing and stronger than that of the triangular sewing. By adjusting, it is possible to set the front height of the loop-shaped portion 7 and the loop-shaped portion 7 having the unique configuration as described above, that is, the constriction portion 7a, to a specific range. Said needle thread 5 can also be made into two strands, as shown in FIG.

The tape 1 may be either a woven tape, a weft tape or a warp knitted tape. The present invention can also be applied to a concealed slide fastener formed by bending one end of the tape to face the inside of the tape and double-stitching the fastener element on the bottom of the bent end.

The elements are sealed with the looper yarns 4 and the needle yarns 5, and then the elements and the tapes are heat-set by the dyeing process or dry heat fixation. The needle thread 5 made of thermoplastic monofilament yarn by heat setting is rigidly fixed in shape as it is. Although heat shrink usually occurs in the needle thread 5 by heat setting, in this case, the tension may be adjusted at the time of sealing so that the shape after the heat shrinkage maintains the above-mentioned loop-shaped portion 7 and the protruding height 1.

The rigid fixation of the needle thread 5 in the above-described shape is very effective for preventing the loosening of the service at the fastener cut end and for holding the element and the tape at the cut end. That is, for example, when the cutting end 5 'of the needle thread 5 continues to the entanglement 6 as shown in FIG. 3, the loop shape of the needle thread 5 fixed in the entanglement 6 is formed. Unfastening is strongly impeded since the end of the loop yarn 4 is captured by the part 7, in particular its constriction 7a, and the cutting end 5 ′ is also held by the seam 3. The element 2 'and the other elements adjacent to the element 2' are securely held on the tape.

In addition, as shown in FIG. 4, when the cutting end 5 'of the needle thread 5 is continuous on the tape side at the cutting end of the fastener, the bent portion 14 is fixed in its shape while being bent at the back of the tape. The loosening of the needle thread 5 is prevented by, and the lower leg 2c 'of the first element 2' of the cut end is held strongly together with the tape 1. On the side of the element upper part 2b, the needle thread 5 of which the shape is fixed at the entanglement part 6 between the upper part 2b 'and the second element upper part 2b of the first element 2' is fixed. The looping portion 8 and the connecting portion 8a of the front line are in a close state into the loop-shaped portion 7, and the rear loop portion 9 is provided between the looping portion 8 and the string 3 of the front line. It is pinched to prevent loosening at this part as in FIG. In this way, the fastener cutting end portion is captured and fixed to the specific shape of the needle thread even if the cutting is performed at any position, and the first element 2 'and the other elements adjacent to the element 2' at the cutting end are prevented. Should not look firm.

As the element near the cutting end is held firmly, there is an advantage that the fastener chain can be easily fitted to the slider 15 as follows. In the case where the fastener chain F is fitted to the slider 15, the method of fitting from the front end 16 of the slider 15 with the element open and the rear end opposite to the front end in the state where the element is engaged There are two ways to insert from (17). In the latter method, as shown in FIG. 7, the fastener chain F is inserted into the rear end portion 17 of the slider 15 fixed in position with the fingers, and the fastener chain F is inserted into the neck portion of the slider 15 ( At the position just before the neck (18) touches, pull the tape (1), (1) in the direction of the arrow (19), (19) to open several elements (2) at the tip as shown in FIG. In this state, the tapes 1 and 1 are pulled in the directions of the arrows 20 and 20 to insert the sliders. In order to open the number of elements by pulling the tape in the direction of arrows 19 and 19 in fitting the slider, the first element 2 'of the element, especially the cut end, must be securely captured by the tape 1. . Because when the force in the direction of the arrow (19) (19) is applied to the tape, it is transmitted from the tape to the end element through the needle thread (5) fixed by the looper thread (4), so that the occlusion of the element If the end element is not captured, the first element 2 'is engaged with only the tape moving in the direction of the arrow 19 when the end element is not captured. I can't. In conventional slide fasteners, the capturing of the end element becomes unstable due to the loosening of the service at the cutting end. Therefore, it is sometimes impossible to insert the chain from the neck 16 of the slider because the chain cannot be inserted from the rear end of the slider. This has been a problem when the customer uses the method of attaching the slider 15 to the clothing and the like by sealing the continuous chain F.

In the slide fastener according to the present invention, the element is firmly captured by the shape fixing of the needle thread 5 at the cutting end as described above, and the loop-shaped portion 7 and the tightening of the needle thread 5 at the entanglement 6 Since the looper yarn 4 is firmly held on the needle yarn 5 by the portion 7a, the unitary elements of the end element and the tape are very high, and as a result, chain fitting is easy as shown in FIGS. 7 and 8. I could do it.

The fastener of the present invention is further more effective in preventing the trimming of the looper yarn 4. As described above, in the case of triangular sewing, since the looper yarn 4 becomes large on the upper part 2b of the element, the front end 13 of the looper yarn was easily worn by sliding of the slider 5. Furthermore, in the case of flat sewing, the looper yarn 4 is drawn in the direction of the string string 3 so that the front portion 13 of the looper yarn 4 is partially enlarged on the upper part 2b of each element 2. Likewise, it was easy to loosen as the front part 13 was worn by sliding of the slider. That is, there is a problem that any of the prior art, such as flat sewing, triangular sewing, wear the Ruper yarn. Especially when the multifilament yarn is used as the looper yarn, the tendency is prominent. Since the front part of the looped portion 7 of the needle thread 5, which is a rigid monofilament yarn, is flush with or slightly protrudes from the front part of the looper yarn 4, the front part of the looper yarn 4 accordingly. (13) is protected from abrasion during sliding of the slider, so that trimming is effectively prevented.

)이라도 좋고 제10도에 나타내느 바와 같이 요철홈(凹凸

)등이라도 좋다.In addition, since the fastener of the present invention is stronger than the tension of the looper yarns in the case of flat sewing, the looper yarns are easily fixed in a relatively narrow range on the corners of the elements. Thus, as in the embodiments of FIGS. 9, 10, and 11, the service insertion groove 21 is formed on the surface of the element upper portion 2b, and the looper yarn 4 is inserted therein. As shown in the system, the shape of the service induction groove 21 is a groove.

) May be used as shown in FIG.

) May be used.

In this way, as the looper yarn 4 is squeezed into the service indentation groove 21, the looper yarn 4 can be prevented from increasing at the same time despite the use of the special sealing technique according to the present invention. Since it does not rise on the element upper part 2b, wear by the slider is also reduced and it is effective also in prevention of trimming. In addition, since the looper yarn is held in the service inlet groove 21, when the fastener chain is strongly bent in a direction perpendicular to the longitudinal direction and toward the tape side from the element side, the looper yarn 4 is formed of the element upper portion 2b. It does not slip on a phase and becomes a fastener with a large bending strength.

In addition, the cross-sectional shape of the monofilament yarn used as the needle thread 5 is non-circular as shown in Figs. 13 (b) to 13 (e), as well as circular as shown in Fig. 13 (a). Can also be used. That is, in Fig. 13 (b), the oval (c) illustrates that the triangle (d) is a forward direction and (e) is a rectangular shape, but any non-circular shape other than these may be used. In this way, the non-circular monofilament yarn is used as the needle yarn 5 so that the frictional resistance between the needle yarn 5 and the tape 1 and the entanglement between the needle yarn 5 and the looper yarn 4 can be obtained. In (6), the frictional resistance becomes large, and the locking effect becomes larger. Therefore, the anti-loosening effect and the anti-slip effect of the tape can be further enhanced.

As described above, according to the present invention, the shape of the appropriate heating means is fixed by using a thermoplastic monofilament yarn such as nylon as the needle yarn, and furthermore, since the needle yarn at the entanglement forms a loop-shaped portion having a contraction portion, the tape is cut. The loosening of the sealing yarn occurring at the end can be effectively prevented, and the end element including the first element at the cut end is reliably captured integrally with the tape. Therefore, the fastening chain in the occlusal state is opened and the external force is completely transmitted from the tape to the element, so that the occlusal element can be reliably opened, so that the chain-fitting operation from the rear end of the slider can be performed very easily.

In the slide fastener of the present invention, the surface portion of the loop-shaped portion is slightly protruded from the surface portion of the looper yarn or is located on substantially the same surface. Therefore, the trimming of the looper yarn is effectively prevented.

According to the present invention, since the looper is sealed with the element side and the needle thread on the tape side, the sealing operation can be performed without changing the model structure of the sewing machine, thus maintaining high productivity and obtaining a high quality slide fastener. .

Claims (1)

A fastener element (2) containing a string (3) is placed on one side of the fastener tape (1), the looper yarn (4) is stretched to the element surface side, and the needle thread (5) extends from the tape back side to the fastener element. In the slide fastener formed by exposing the looped portion 7 to the surface of the element and sealed by double stitching interposed with the looper yarn 4, the looper yarn 4 is a multifilament yarn or a spanner yarn. As the needle thread 5, a thermoplastic monofilament yarn is used, respectively, while the needle thread 5 constitutes a loop-shaped portion 7 having a constriction portion 7a at the entanglement 6 and also seals the element. Slide fastener characterized in that the monofilament yarns are fixed by heat-setting after.

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