JPS6220346B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Background and Objectives of the Invention] The present invention relates to a sheet waterproof structure that allows fluid accumulated between a waterproof base and a waterproof sheet applied to the surface of the base to be discharged to the outside.

When installing a tarpaulin sheet, the base is thoroughly dried and the base is tightly adhered to prevent any voids from forming, but it is impossible to completely expel air and moisture contained in the base, primer, adhesive, etc. It is. Therefore, after the waterproof sheet is applied, the air and moisture inside expands due to solar heat and other heat, pushing up the sheet and causing swelling.
Changes in temperature and repeated exposure to negative pressure during strong winds can reduce the strength of the sheet, causing damage to the sheet and causing rain leaks.

In view of the above, the present invention has been made for the purpose of providing a sheet waterproof structure that allows expanded fluid to be easily discharged to the outside and that can be constructed easily and inexpensively.

[Summary of the Invention] The present invention has a sheet waterproof structure in which an adhesive is applied to a waterproof substrate and then a waterproof sheet is bonded to the waterproof substrate. Pressure-sensitive adhesive tape is pasted at regular intervals so that the top surface is the non-adhesive surface, and the rising end of the pressure-sensitive tape is communicated with the outside air, and The sheet waterproof structure is characterized in that an adhesive is applied to the parts of the sheet to which the pressure-sensitive adhesive tape is not attached, and then a waterproof sheet is partially adhered to the waterproof base through the adhesive-applied parts. .

That is, in the sheet waterproof structure of the present invention, adhesive is not applied over the entire surface of the waterproof base, but a pressure-sensitive adhesive tape having a non-adhesive upper surface and a pressure-sensitive adhesive lower surface is applied to the waterproof base in advance. The areas on the waterproof base where the pressure-sensitive adhesive tape is not attached are pasted at regular intervals so that the pressure-sensitive adhesive tape is on the non-adhesive surface, and the rising end of the applied pressure-sensitive tape is communicated with the outside air. It is characterized by applying an adhesive to the surface, and then partially adhering a waterproof sheet to the waterproof base through the adhesive-applied area.

The effect of the present invention is that the pressure-sensitive tape, which has a non-adhesive upper surface and a pressure-sensitive adhesive lower surface, is pasted on the waterproof substrate at regular intervals so that the upper surface is the non-adhesive surface. Because the adhesive applied to the base is divided, the amount of air bubbles generated is small, and the air bubbles disappear quickly.Furthermore, the waterproof sheet applied over it only adheres to the adhesive-applied area, so it does not feel like a waterproof sheet. The interface of the pressure adhesive tape acts as an atmospheric dispersion channel for remaining adhesive solvent, air, moisture, and other fluids, thus effectively preventing the waterproof sheet from swelling after installation.

In the present invention, the pressure-sensitive adhesive tape having a non-adhesive upper surface and a pressure-sensitive adhesive lower surface has a thin film or coating formed of a non-adhesive resin such as fluororesin, silicone resin, polyethylene, or polypropylene on the upper surface. , with a pressure-sensitive adhesive applied to the bottom surface.
The appropriate thickness is one that is as thin as the adhesive applied to the waterproof base.

Note that the pressure-sensitive adhesive tape may be applied vertically, horizontally, diagonally, or in any of these directions, and the ends must be in communication with the outside air to allow fluid to escape. be.

[Example] Next, an example of the sheet waterproof structure of the present invention will be described with reference to the drawings.

In Figure 1, reference numeral 1 indicates a base that requires waterproofing. On the top surface of this base, pressure-sensitive adhesive tape 2 is pasted vertically and horizontally at regular intervals, and adhesive 3 is applied to the remaining part. The surface is almost flat.
Each pressure-sensitive adhesive tape 2 has a non-adhesive upper surface, and the ends are slightly longer.
There is no problem even if some parts are short or are divided in the middle, although the parts intersect and are connected in the middle. Of course, depending on the case, it may be vertical, horizontal, or diagonal.

When applying adhesive 3, use each pressure-sensitive adhesive tape 2
Although some adhesive will be applied to the top surface of the , it will not bind. Depending on the case, each pressure-sensitive adhesive tape 2 may be applied after applying the adhesive 3.
Reference numeral 4 denotes a waterproof sheet formed by integrally adhering the pressure-sensitive adhesive tape 2 and adhesive 3 onto the layers.

In this case, since the lower surface of the waterproof sheet 4 and the upper surface of the pressure-sensitive adhesive tape 2 have a laminated structure in which they are in direct contact in a non-adhered state, the waterproof sheet 4 is in direct contact with the upper surface of the pressure-sensitive adhesive tape 2. It goes without saying that the lower surface portion of the sheet 4 is formed as a so-called "floating surface portion 7."

In addition, in this case, at the end of the waterproof sheet 4 which becomes the rising part 8, as shown in FIG.
Only the pressure-sensitive adhesive tape 2 protruding from the end of the tarpaulin sheet 4 is folded back to the outside of the end of the tarpaulin sheet 4, and the folded portion of the pressure-sensitive adhesive tape 2 and the outer periphery of the end of the tarpaulin sheet 4 are The upper end portion of the waterproof base 1 above the rising portion 8 is lap-bonded to the lower end portion of another waterproof sheet 5, the upper end of which is bonded with a seal 6.

In this case, the waterproof sheets 4 and 5 are bonded together with an adhesive, but since the floating adhesive surface 7 needs to communicate with the outside air, in this case, the pressure sensitive when folded back is Only the inner surface of the adhesive tape 2, that is, the surface of the outside end of the waterproof sheet 4 at the rising part and the pressure-sensitive adhesive tape 2 are in direct contact in a non-adhered state, and furthermore, the end surface of the pressure-sensitive adhesive tape 2 is By exposing the wrap to the outside, the floating surface portion 7 of the wrap has a structure that communicates with the outside air. Therefore, at the lap portion of the rising portion, the inner surface of the folded pressure-sensitive adhesive tape 2 becomes a floating sticking surface portion 7.

With such a sheet waterproof structure, the 4 surfaces of the waterproof sheet on the top surface of the pressure-sensitive adhesive tape 2 become non-adhesive parts and form the floating adhesive surface part 7, and the floating adhesive surface part 7 is attached to each end of the waterproof sheet 4. Since the rising part 8 is connected to the outside air, even if fluid such as air or moisture existing between the base 1 and the waterproof sheet 4 expands due to heat, the expanded fluid will As shown in FIG. 3, the floating adhesive surface portion 7 is brought into direct surface contact with the upper surface of the pressure-sensitive adhesive tape 2 in a non-adhesive state due to the pressure of the fluid.
The waterproof sheet 4 is pushed up a little to form a gap for a fluid passage while moving along the raised adhesive surface part, further passes through the raised adhesive surface part 7 of the rising part 8 of the waterproof sheet 4, and is discharged from the wrap part to the outside. There is no possibility that the tarpaulin sheet 4 would swell as a result of it twisting and losing its escape.

Furthermore, by simply interposing the pressure-sensitive adhesive tape 2 between the waterproof base 1 and the waterproof sheet 4, a fluid passage gap can be formed extremely easily. By forming an uneven surface on the bottom surface, there is no need for it.
It is extremely easy to construct and is therefore also economical.

In addition, since the pressure-sensitive adhesive tape 2 is only interposed, the outer surface of the waterproof sheet 4 other than the edges of the pressure-sensitive adhesive tape 2 can maintain a smooth surface with few irregularities, resulting in a good aesthetic appearance. Moreover, if the adhesive 3 is applied in a thickness that is approximately the same as that of the pressure-sensitive adhesive tape 2 as in this embodiment, a completely smooth outer surface of the waterproof sheet 4 can be obtained.
In addition, since the pressure-sensitive adhesive tape 2 is interposed between the waterproof base 1 and the waterproof sheet 4, the aesthetics can be very easily improved by adjusting the amount of adhesive 3 applied. The fact that it can be obtained is also something that cannot be overlooked.

Further, according to an embodiment of the present invention, each end portion of the waterproof sheet 4 that becomes the rising portion 8 is
By simply folding back only the portion of the pressure sensitive adhesive tape 2 that protrudes from the end of the tape and attaching it in a lap manner, a gap for a fluid passage communicating with the outside air can be formed very easily.

Moreover, the side surface of the floating adhesive surface part 7 of the folded pressure-sensitive adhesive tape 2 portion faces downward, and the floating adhesive surface part 7 itself is not connected to the pressure-sensitive adhesive tape 2 when the fluid is not being discharged. Since they are in almost direct contact with each other in an adhesive state, there is little risk that rain or wind will penetrate between the non-adhesive surfaces.

Note that the width of the pressure-sensitive adhesive tape 2 is related to swelling due to negative pressure during strong winds such as typhoons. adhesive 3
Approximately 200% when the wind speed is 40m/sec
Swelling is seen in mm. Therefore, it is desirable to use a pressure-sensitive adhesive tape 2 having a width of 200 mm or less. By appropriately selecting the width and spacing of this pressure-sensitive adhesive tape 2, a predetermined fluid removal efficiency can be ensured.

Further, in one embodiment of the present invention, the pressure sensitive adhesive tape 2
Although only the upper surface is the non-adhesive surface, the lower surface of the pressure-sensitive adhesive tape 2 may be the non-adhesive surface, or the entire surface of the pressure-sensitive adhesive tape 2 may be the non-adhesive surface.

[Effects of the Invention] As described above, this invention has a sheet waterproof structure with a pressure-sensitive adhesive tape interposed between them, so its construction is extremely easy and does not require much construction time or material costs. This has the effect of preventing the tarpaulin sheet from swelling without causing any damage.

[Brief explanation of the drawing]

1 is a schematic explanatory diagram showing an embodiment of the present invention, FIG. 2 is a schematic sectional view of the main part of FIG. 1, and FIG. 3 is an enlarged sectional view of the main part of FIG. 1. 1...Waterproof base, 2...Pressure sensitive adhesive tape, 3...
...Adhesive, 4 and 5...Waterproof sheet, 6...Sheet, 7...Floating adhesive surface part, 8...Rising part.

Claims (1)

[Claims] 1 In a sheet waterproof structure in which an adhesive is applied to a waterproof base and then a waterproof sheet is attached, a pressure-sensitive adhesive tape with a non-adhesive upper surface and a pressure-sensitive adhesive lower surface is applied to the waterproof base in advance. At the same time, the pressure-sensitive tape is pasted at regular intervals so as to form an adhesive surface, and the rising edge of the pressure-sensitive tape is communicated with the outside air, and the adhesive is applied to the parts of the waterproof base where the pressure-sensitive adhesive tape is not pasted. 1. A sheet waterproof structure characterized in that the waterproof sheet is partially adhered to a waterproof substrate through the adhesive-applied portion.