JPS63295705A - Method for stopping stitch in waterproof wear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" This invention relates to a method for sealing seams in waterproof clothing such as raincoats.

``Prior art'' Waterproof clothing such as raincoats is mainly made by cutting and sewing a waterproof sheet, which is made by laminating a waterproof resin such as vinyl or polyurethane onto a synthetic fabric. Since the parts are not waterproof, the relevant parts are waterproofed.

FIGS. 5 and 6 show an example of a seam portion in such a conventional waterproof garment.

In this waterproof garment, one waterproof sheet 11 has its end folded back, and the other waterproof sheet 12 has its end folded back.
The respective folded portions 13 and 14 of are overlapped so as to be hooked onto each other, the overlapped portions are sewn as shown by reference numeral 15, and a tape 16 made of vinyl chloride resin or the like is overlaid on this overlapped and sewn portion, The structure is such that these overlapping parts are welded together using a sealing device which will be described below.

As shown in FIG. 7, the sealing device includes a pressure bar 21 and a back plate 22, and by applying a high frequency voltage between these, the tape 16, etc. pressed by the pressure bar 21 is melted appropriately. , welding can be performed.

In the waterproof clothing obtained in this way, a portion of the melted tape 16 etc. flows into the seams and fills the seams, so waterproofness can be maintained well over a long period of time, resulting in good durability. .

In addition, when using the press bar 21 having serrations 23 formed on the outer peripheral surface as shown in FIG.
The seams of waterproof clothing are jagged, as shown by reference numeral 24 in FIG. Since diffusion in the length direction can be prevented while allowing diffusion in the length direction, water intrusion can be minimized and durability is further improved.

By the way, in conventional waterproof clothing, the waterproof sheet 1
The overlapping seam portion 1.12 is thicker, and only this thicker portion is substantially pressed by the pressing bar 21.

For this reason, the work of positioning the overlapped and sewn portions of the waterproof sheets 11 and 12 below the press bar 21 is quite troublesome, tends to shift, and requires considerable skill in manufacturing. In particular, as the tape 16, the width (1
0 mm or less), the positioning of the tape 16 is troublesome, and there is a drawback that more skill is required for manufacturing.

FIGS. 9 and 10 show an example of a seam portion in a conventional waterproof garment that can eliminate such defects.

In this waterproof jacket, one waterproof jacket is folded back at the end)
The other waterproof sheet 32 whose end is folded back in the same way as 31
The folded portions 33 and 34 of the folded parts 33 and 34 are overlapped so as to be hooked onto each other, and the overlapped parts are sewn as shown by reference numeral 35. This overlapped and sewn part and the parts on both sides thereof are coated with vinyl chloride resin, etc. Resin tapes 37 coated with adhesive 36 are overlapped, and a sealing device (equipped with a pressure roller 41 and a bank roller 42 whose outer peripheral surfaces are both flat) as shown in FIGS. 11 and 12 is overlapped. The tape 37 is bonded by appropriately melting the adhesive 36 of the tape 37 (a structure in which hot air is blown onto the adhesive 36 of the previous tape 37 from a nozzle 43) and applying pressure.

In this waterproof garment, the seam 137 is glued on the entire surface, so by using a somewhat wide piece of tape 37, such as a 20 mm tape, the seams can be covered securely with the tape 37 even if it is slightly off. It does not require any skill to manufacture.

However, in conventional waterproof clothing like this, the tape 37 is simply glued on, so the seams cannot be filled in, and if water enters here, the adhesive strength of the adhesive 36 in this area will deteriorate over time. There was a drawback that the tape 37 became weak and eventually peeled off, allowing water to enter. Moreover, since there is nothing to act as a waterproof wall, the intruding water spreads in all directions, weakening the adhesive force of the surrounding adhesive 36, and promoting peeling of the tape 37.

``Problems to be Solved by the Invention'' As described above, the waterproof clothing shown in Figures 5 and 6 has good durability, but has the problem of requiring skill to manufacture. Although the waterproof garment shown in Figure 10 does not require any skill to manufacture, it has a problem of poor durability.

The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a method for sealing seams in waterproof clothing that has good durability and does not require skill to manufacture.

"Means for solving the problem" The method for sealing seams in waterproof clothing according to the present invention is as follows:
Hot air is blown onto the mutually opposing surfaces of the parts where the ends of the two waterproof sheets are overlapped and sewn together, the parts on both sides, and the thermoplastic resin tape overlapped with these parts. This method is characterized in that it is melted appropriately, then the two are overlapped, and the two are passed between a pressure roller and a back roller to apply pressure to the overlapped portion.

According to this invention, not only the tape but also the tarpaulin sheet is appropriately melted, so a portion of this melted material can flow into the seams and fill the seams, and since no adhesive is used, There is no peeling of the tape due to changes, which improves durability, and since both are melted together and welded together by applying pressure, the tape can be welded over the entire surface, and it can be used as a tape. By using a wide one, it can be manufactured without requiring any skill.

If a ring-shaped recess is provided in the center of the outer peripheral surface of the pressure roller to correspond to the overlapping seam portion of both waterproof sheets, and this recess is made jagged, the overlapping seam portion of both waterproof sheets will be thick. In addition to being able to apply the desired pressure over the entire area, a jagged waterproof wall can be formed, and both sides of this waterproof wall in the width direction can also be sealed by welding, increasing durability. This means that you can improve your performance even further.

"Embodiment" Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

First, as shown in FIGS. 1 and 2, the folded parts 53 and 54 of one waterproof sheet 51 whose end is folded back and the other waterproof sheet 52 whose end is folded back are hooked together. They are overlapped, and the overlapped portions are sewn as shown by reference numeral 55. Next, the material thus obtained is set in a sealing device as shown in FIG.

The sealing device includes a pressure roller 61 and a back roller 62, and further includes a nozzle 63 for blowing hot air provided in front of these rollers 61 and 62. As shown in FIG. 4, the pressure roller 61 has a ring-shaped recess 64 in the center of its outer peripheral surface corresponding to the overlapped and sewn portion of both waterproof sheets 51 and 520, and this recess 64 is jagged. It has a structure.

In the sealing device, a tape 71 made of thermoplastic resin such as vinyl chloride resin is superimposed on the overlapped and sewn parts of both waterproof sheets 51 and 52 and the parts on both sides thereof. Hot air is blown from the nozzle 63 onto the surfaces to melt the opposing surfaces appropriately, and then the two are overlapped. This overlapped material passes between the pressing roller 61 and the back roller 62, thereby applying pressure and welding.

In the waterproof garment obtained in this way, the tape 71 is welded on the entire surface, so by using a somewhat wide tape 71, for example, 20 nm, the tape 71 can secure the seam even if it is slightly misaligned. It can be applied to many people, and does not require any skill to make. In addition, since not only the tape 71 but also the waterproof sheet 51 is melted appropriately, some of this melted material flows into the seams and fills the seams.Moreover, since no adhesive is used, the tape may change over time. No peeling of 71 occurs, resulting in improved durability. Furthermore, since a jagged recess 64 is formed in the center of the outer peripheral surface of the pressure roller 61, even if the overlapping and sewn parts of both waterproof sheets 51 and 52 are thick, the desired pressure can be applied to the entire surface. In addition, a jagged waterproof wall is formed as shown by reference numeral 72 in FIG. 1, and both sides of the waterproof wall 72 in the width direction are sealed by welding, further improving durability.

In addition, in each of the conventional waterproof garments mentioned above, the tape is 16.3 mm.
Wrinkles appeared near No. 7, and the appearance was quite inferior, but the waterproof garment obtained by this invention did not have wrinkles and had a good appearance.

``Effects of the Invention'' As explained above, according to the present invention, seams can be filled, and since no adhesive is used, the tape does not peel off, resulting in improved durability and the ability to use wide tape. By welding the entire surface, the seams can be reliably covered even if there is some misalignment, so it can be manufactured without requiring any skill, and it can also be wrinkle-free and have a good appearance.

If a ring-shaped recess is provided in the center of the outer peripheral surface of the pressure roller to correspond to the overlapping seam portion of both waterproof sheets, and this recess is made jagged, the overlapping seam portion of both waterproof sheets will be thick. In addition, it is possible to apply the desired pressure over the entire surface, and to form a jagged waterproof wall, and both sides of this waterproof wall in the width direction are sealed by welding, further improving durability. Can be done.

[Brief explanation of the drawing]

FIGS. 1 to 4 are shown to explain one embodiment of the present invention, of which FIG. 1 is a plan view showing the seam portion of waterproof clothing, and FIG. A cross-sectional view along line A,
3 and 4 are a front view schematically showing a sealing device and a perspective view showing its pressing roller, FIG. 5 is a plan view showing an example of a seam portion of a conventional waterproof garment, and FIG. B in Figure 5
7 and 8 are front views showing the outline of this conventional sealing device for waterproof clothing and a perspective view showing its press bar, and FIG. 9 is a seam of the conventional waterproof clothing. 10 is a sectional view taken along line C-C in FIG. 9, and FIGS. 11 and 12 are front views schematically showing this conventional sealing device for waterproof wear. It is a perspective view which shows a figure and its press roller. 51.52... Tarpaulin sheet, 53. ．． 54... Turned part, 55... Sewing part, 61... Press roller, 62... Back roller, 63... Nozzle for blowing hot air, 64... Concave part (jagged), 71... Thermoplastic resin tape, 72... Jagged waterproof wall.

Claims (2)

[Claims] (1) Hot air is blown onto the opposing surfaces of the parts where the ends of two waterproof sheets are overlapped and sewn together, the parts on both sides of the parts, and the thermoplastic resin tape overlapped with these parts. A method for sealing seams in waterproof clothing, characterized by suitably melting opposing surfaces, then overlapping the two, and applying pressure to the overlapping portion by passing between a pressing roller and a back roller. (2) The pressing roller has a ring-shaped recess in the center of its outer peripheral surface corresponding to the overlapped and sewn portion of both of the waterproof sheets, and the recess is jagged. A method for sealing seams in waterproof clothing as described in item 1.