JPH0114167Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a slide fastener that can be opened in reverse by attaching two sliders to a pair of left and right fastener stringers. This invention relates to a slide fastener in which left and right fastener stringers can be separated by attaching two bar-shaped metal release tools.

Prior Art In this type of slide fastener, in order to facilitate the attachment and detachment of one release tool to the slider, the opposing surfaces of the lower ends of both release tools are generally deformed to the fastener tape side (in the width direction of the release tool). (retracted) guide surface, the releasing tool having a slider stopping protrusion at the lower end is the fixed side, and the releasing tool not having the stopping protrusion is the insertion side. In addition, in a slide fastener using such a release tool, it is necessary to accurately set the amount of deformation of the release tool in the width direction to a constant value, and if there is an error in the amount of deformation,
Lower the two sliders to the lower end of the fastener stringer, and check the stop projection formed on one release tool and the stop formed in the Y-shaped guide groove of the lower (release tool side) slider. The ease of operation when inserting the release tool of the other fastener stringer into both sliders and the ease of starting when pulling up the upper slider after insertion are poor, and when the release tool of the other fastener stringer is engaged and positioned with the The mounting strength of the release tools may be reduced, and the engaging portions formed on the opposing surfaces of the release tools and used to position the release tools when pulling up the upper slider may not engage sufficiently, causing the release tool to be inserted into the slider. This results in drawbacks such as overrun.

However, the metal release tool used in conventional slide fasteners of this type is generally in a substantially straight shape before being attached to the fastener stringer, and the fastener stringer has a core string molded part, etc. of the fastener stringer. Although it is installed by applying pressure in the thickness direction (front and back direction) with one end edge inserted into the insertion groove with a roughly U-shaped cross section, the release tool is not attached to the fastener stringer. Since the release device is approximately straight, the opposing surfaces of the lower part of the release tool are modified to be guide surfaces that are deformed toward the fastener tape side (width direction side) with respect to the upper part, in order to make it easier to attach and remove the release tool. After tightening and fixing, the entire lower part of the releasing tool is transformed into the fastener tape side.

In this way, if the lower part of the releasing tool is deformed in the width direction as a whole, it is difficult to keep the amount of deformation accurately constant. This results in poor performance, reduced installation strength, and even the release tool to be inserted may overrun.

In addition, since the release tool is crimped in the thickness direction and then deformed in the width direction, the process is two-step, and the equipment for this requires a complicated structure, and a large force is required to deform it in the width direction. This makes it difficult to automate.

Furthermore, as shown in FIGS. 11A and 11B, release tools for slide fasteners using coil-shaped fastener elements generally have an asymmetrical cross-sectional shape (in the thickness direction), so the lower part of the release tool is If the entire fastener tape 2 is deformed, the upper and lower parts of the releasing tool 1 will be twisted relative to each other due to an error in the amount of deformation.

If the upper and lower parts of the release tool are twisted relative to each other in this way, not only will the product value be lowered, but when the upper and lower sliders are lowered to the lower end, the upper and lower parts will be twisted as shown in Figure 11C. Sliders 3 and 4 are tilted towards each other. This makes it difficult to attach and detach the release tool (not shown) on the insertion side to and from the sliders 3 and 4.

That is, the lower slider 3 generally has:
As shown in FIGS. 11A and 11B, it has a stopping recess 6 that engages with the slider stopping protrusion 5 formed at the lower end of the fixed release tool 1. If the size is approximately the same as that of the protrusion 5 (if there is no dimensional allowance), when the sliders 3 and 4 are lowered to their lower ends, the lower slider 3 will be attached to the upper slider 4 due to the twisting of the releasing tool. On the other hand, since it is tilted as shown in FIGS. 11B and 11C, it becomes difficult to attach and detach the insertion-side release tool from the sliders 3 and 4.

For this reason, conventionally, as shown in FIGS. 11A and 11B, the stopping recess 6 of the slider 3 is enlarged to provide a dimensional margin, and a recess 7 is also provided on the opposite side of the stopping recess 6. was forming. However, if this is done, the sliders 3 and 4 must be manually adjusted to the correct posture when attaching and detaching the release device on the insertion side, making it troublesome to attach and remove the release device.
As shown in FIG. 1B, the release tool 1 is inclined with respect to the slider 3, and the sliding properties of the sliders 3 and 4 are deteriorated.

A slide fastener has been proposed that prevents the sliders from tilting toward each other due to twisting of the releasing tool when the upper and lower sliders are lowered (Jikkoaki).
54-18325). However, in this slide fastener, a tongue piece is formed at the rear end of one slider, a recessed part is formed at the rear end of the other slider, and the tongue piece and the recessed part are engaged with each other. Since the configuration corrects the posture of the slider, not only did the appearance look bad, but the tongue piece and the recessed part sometimes did not engage properly.

Structure of the invention According to the present invention, each releasing tool is formed in advance by die-casting into a shape having a guide surface curved toward the fastener tape at the lower part of the surface facing each other, and the fastener stringer is formed by die-casting. By simply tightening the release tool in the thickness direction and fixing it, the structure eliminates the need to transform the lower part to the fastener tape side, and the recess for stopping the slider is made approximately the same size as the protrusion for stopping the slider. achieved.

Purpose of the invention The present invention eliminates the need to deform the lower part of the release tool in the width direction after attaching the release tool to the fastener stringer, thereby making it easier to attach and detach the release tool to the slider and move the slider. To provide a slide fastener in which the upper and lower sliders can be in the correct posture without forming a tongue piece or a recessed part on the slider, and in addition, the work of attaching a release tool to a fastener stringer can be performed by an automatic machine. shall be.

Embodiments Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

In FIGS. 1 to 10, reference numerals 10 and 11 are fastener stringers, and fastener elements 14 and 15 are attached to opposite edges of fastener tapes 12 and 13, and metal fastener stringers are attached to opposite edges of the lower end. The release tools 16 and 17 are attached. The fastener elements 14 and 15 are coil-shaped fastener elements in the illustrated example.

The release tool 16 is a fixed side release tool, and the release tool 17 is an insertion tool. Both separating tools 16 and 17 are made by die-casting.

As shown in FIGS. 2 to 8, the fixed-side release tool 16 is formed into a U-shaped cross section by three walls 20, 21, and 22, and has an insertion groove 23. The insertion groove 23 is open on the fastener tape 12 side and the upper side, that is, on the fastener element 14 side, and extends substantially straight from the top to the bottom as shown in FIG.

Of the wall 20 located on the front side of the release tool 16, the edge on the fastener tape 12 side is bent toward the wall 21 located on the back side, and the surface of the bent part on the insertion groove 23 side is an element. It has a flat surface 29 extending in the direction of the rows, and the end portion has a thick wall portion 24 projecting toward the fastener tape 12 side.

Of the walls 20 and 21 of the release tool 16, a bulge 25 is formed at the edge in the vertical direction on the fastener tape 12 side to form a bulge portion 25 that slightly bulges toward the fastener tape 12 side, thereby making the other parts thinner. This makes it easy to insert into sliders.

The wall 22 of the release tool 16 includes an engagement protrusion 26 that fits into an engagement recess 47 formed on the release tool 17 on the insertion side, which will be described later, and an engagement protrusion 4 formed on the release tool 17.
An engaging recess 27 into which the fastener tape 12 is fitted is formed adjacent to the upper part, and a notch 28 into which a part of the fastener tape 12 is fitted is formed from the upper end side.

The surface of the wall 22 of the release tool 16 facing the release tool 17 on the other side is a flat surface 30 extending in the direction of the element row at the upper part, and the wall 22 downward from the flat surface 30 is curved in two steps toward the fastener tape 12 side. The release tool 17 is formed into guide surfaces 31 and 32 that facilitate attachment and detachment, whereas the surface on the opposite side, that is, the insertion groove 23 side, corresponds to the flat surface 30 and the guide surface 31 located at the center. is a flat surface 33 extending substantially linearly,
The portion facing the guide surface 32 located on the lower end side is an inclined surface 34 that is inclined toward the fastener tape 12 side. Therefore, the wall 22 has a thick portion 35 at the boundary between the flat surface 30 and the guide surface 31, and the insertion groove 23 has a lower end tapered by an inclined surface 34.

A slider stopping protrusion 36 is formed on the surface side of the lower end of the fixed release tool 16.

The release tool 17 on the insertion side is the same as the release tool 1 on the fixed side, except that it does not have the bulging part 25 and the stopping protrusion 36 and is slightly longer than the release tool 16 on the fixed side.
It is made in the same shape as 6. For this reason, the release tool 1
7 also includes an insertion groove 43, a thick wall portion 44, an engaging protrusion 46,
It has an engagement recess 47, a notch 48 corresponding to the notch 28 of the releasing tool 16, flat surfaces 49, 50, 53, guide surfaces 51, 52, an inclined surface 54, and a thick portion 55.

The release tools 16 and 17 are fastener stringers 1
Core string forming part 37 formed at the lower end of 0, 11,
57 is inserted from the upper end side of the insertion grooves 23, 43, and is then crimped and fixed to the fastener stringers 10, 11 by applying pressure in the thickness direction.

Since the surfaces 29, 33, 49, 53 forming the insertion grooves 23, 43 of the release tools 16, 17 are flat surfaces extending in the direction of the element rows, the core string forming parts 37, 57 are inserted into the insertion grooves. 23, 43, and therefore, the releasing tools 16, 17 need only be pressurized in the thickness direction and fixed by caulking.
Attachment to the fastener stringers 10, 11 can be automated. In addition, the core string forming part 37,
57 into the grooves 23, 43, especially the surfaces 38, 39, 58, 59 into the flat surfaces 29, 33,
If the shape corresponds to 49 and 53, the insertion groove 2
Insertion of the core cord molded parts 37, 57 into the core strings 3, 43 becomes easier. Furthermore, guide surfaces 31, 32, 5
1 and 52 are already curved toward the fastener tapes 12 and 13, so after tightening the releasing tools 16 and 17, the lower parts of the fastener tapes 12 and 1 are bent.
There is no need to deform it in the direction 3, and it can be firmly attached. Furthermore, thick portions 24, 3
5, 44, and 55, the mechanical strength is high.

As shown in FIG. 1, FIG. 9, FIG. 10, and FIG.
71 and the lower plates 62, 72 on the tip side of the connecting column 6
3, 73, upper plates 61, 71 and lower plate 6
2, 72 with guide flanges 64, 65, 74, 7
5 are provided, pulls 66, 76 are attached to the upper plates 61, 71, and the rear ends are attached to the fastener stringer 10 to which the release tool 16 on the fixed side is attached so as to face each other. The upper plate 61 of the lower slider 60 includes a guide flange 64 of the upper plate 61 and an inverted L-shaped step at least on the inner surface of the shoulder on the releasing tool 16 side. A U-shaped stopping recess 67 is formed to engage with. As shown in FIG. 10, the stopping recess 67 is formed to have approximately the same width as the stopping protrusion 36, so that the two fit together.

Note that the guide flanges 64 and 74 are connected to the upper plate 61,
71, and guide flanges 65, 75 are formed on the lower plates 62, 72.

In this slide fastener, in order to attach and detach the release tool 17 to and from the sliders 60 and 70, the release tool 17 is inserted from the slider 70 into the slider 60 with the sliders 60 and 70 lowered to their lower ends as shown in FIG. , or take it out in reverse.

When the sliders 60 and 70 are in the lowered state as shown in FIG. 67 is the release tool 16
In particular, the inner surface of the guide flange 65 of the lower plate 62 is positioned in contact with the bulge 25 of the releasing tool 16, and in this state it is stopped. When the tool 17 is inserted, the engaging protrusions 26, 46 of the releasing tools 16, 17 engage with the mating recesses 27, 47, and the first element 14 adjacent to the upper end of the releasing tool 16 17 facing elements 15, and does not overrun the releasing tool 17.

The above-mentioned slide fastener includes release tools 16 and 17.
Since there is no twist in the slider, when the sliders 60 and 70 are lowered to the lower end as shown in FIG.
The slider 60 is not tilted with respect to the slider 70 and is maintained in a stable state as shown in FIGS. 9 and 10A, making it easy to attach and detach the releasing tool 17 and to pull up the slider 70. Furthermore, even if a force is applied to the slider 60 to incline it relative to the slider 70, since the stopping protrusion 36 and the stopping recess 67 are formed to have approximately the same width and are fitted together, as shown in FIG. As shown in C, even if it is slightly inclined, attachment and detachment of the releasing tool 17 and pulling up of the slider 70 are not obstructed.

The present invention can be applied not only to slide fasteners using coiled fastener elements, but also to slide fasteners using continuous zigzag fastener elements or individual fastener elements.

Effects of the invention As described above, the present invention is made by die-casting into a shape in which each releasing tool has a guide surface curved toward the fastener tape at the lower part of the surface facing each other. It can be installed simply by crimping, so the upper and lower parts of the release tool do not twist during installation, and the release tool can be installed using an automatic machine. In addition, a stopping protrusion and a stopping recess for stopping the slider are formed to have approximately the same width, and they fit together, and the bulging part 25 of the releasing tool 16 and the guide flange 64 of the slider come into contact with each other, and the slider stops. Since the release tool 16 is pressed in the direction of the opposing release tool 17 with the release protrusion as the center, the upper and lower parts of the release tool do not twist and are engaged with the engagement protrusions on the upper parts of both release tools. The recess and the first of both element rows
Coupled with the normal engagement of the elements, both sliders maintain their correct posture even when the upper slider is lowered to the bottom, and since the entire release tool is formed thinner than the guide channel, the release tool to the slider can be easily moved. It is easy to attach and detach, and the slider can be pulled up smoothly. Furthermore, since there is no need to form tongues or recesses on the slider to keep the slider in the correct position, the slider has a good appearance.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the slide fastener according to the present invention, Fig. 2 is a front view showing an embodiment of the releasing tool on the fixed side, and Fig. 3 is a right side view of the releasing tool. Figure 4 is a left side view of the separation tool, Figure 5 is a bottom view of the separation tool, Figure 6 is a sectional view taken along the - line in Figure 2, Figure 7 is a sectional view taken along the - line in Figure 2, and Figure 8 is a sectional view taken along the - line in Figure 2. The figure shows the state in which the release device is attached with a part of the release device removed, Figure 9 shows the state in which the upper plate of each slider is removed and each slider is lowered, and Figure 10 shows the present invention FIG. 11 is an explanatory diagram of the operation of the conventional slide fastener. 10,11...Fassner Stringer, 1
2, 13... Fastener tape, 14, 15...
Fastener element, 16, 17...Release tool, 3
1, 32, 51, 52...Guide surface, 36...Protrusion, 60, 70...Slider, 67...Stop recess.

Claims (1)

[Claims for Utility Model Registration] A pair of fastener stringers 10, 11, two sliders 60, 70 attached to the fastener stringers 10, 11 with their rear ends facing each other, and the fastener stringers 10, 11. Two releasing tools 16, 17 each attached to opposite edges of one end and made of metal in a bar shape, the releasing tools 16, 17 have fastener tape attached to the lower part of the opposing surfaces. At least one guide surface 31, 32, 5 curved toward 12, 13 side
The releasing tool 16 on the fixed side has a bulging part 25 on the side surface on the tape side and a stopping protrusion 36 on the lower end. , 17 side faces the stopping protrusion 36 on the inner surface of the shoulder on the side of the releasing tool 16 on the fixed side, and has approximately the same width as the stopping protrusion 36. A slide fastener characterized by having a stopping recess 67 that engages with the portion 36.