JPH0351860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applied to construction equipment that detects the position of waterproofing defects such as small holes and poor joints in waterproof sheets stretched over balconies, roofs, etc. of buildings. The present invention relates to a device for detecting the position of waterproofing defects in waterproof sheets for objects.

(Prior art) Until now, there has been no device designed to detect the location of waterproofing defects in a waterproof sheet stretched over a building, and generally, the location of waterproofing defects can be detected through a water filling inspection. It was being done.

This water filling test is performed by blocking the drainage holes provided in the building, filling the entire surface of the tarpaulin with water, and leaving it in the water-filled state for about 24 hours. The purpose of this test was to check whether there was any leakage or not and to confirm whether there were any waterproofing defects.

In addition, as a method to check whether there are any waterproofing defects after filling with water, as described in Japanese Patent Application Laid-Open No. 133150/1983, a conductive sheet is interposed in advance between the building and the waterproof sheet. A method is also known in which the conductive sheet is heated and the energization state of the conductive sheet is detected.

In addition, a conductive sheet has two conductive sheets arranged with an insulator interposed between them, so that when water leaks from a defective waterproofing point, the leaked water connects the two conductive sheets and conducts electricity. It's summery.

(Problem to be Solved by the Invention) However, even if such a conventional method for detecting waterproofing defects in a tarpaulin sheet is used, it is necessary to fill with water, which requires an excessive Furthermore, even if the presence or absence of a defective waterproofing part can be confirmed, the location cannot be confirmed, so there is a problem in that it takes time to repair the defective waterproofing part.

In addition, in the water filling test, water was attempted to penetrate from the waterproofing defective area to the back side of the tarpaulin sheet using only water pressure, so it was almost impossible to detect small holes with extremely small diameters.

In addition, in the method of detecting waterproofing defects using a conductive sheet, it is necessary to interpose the conductive sheet between the waterproof sheet and the building in advance, which is time-consuming and requires a new method. There is a problem in that the cost is high because additional parts are required, and even with this method, it is not possible to confirm the location of waterproofing defects.

(Means for Solving the Problems) The present invention has been made for the purpose of providing a device that can easily detect the position of waterproofing failure in a waterproof sheet for buildings, and solving the above-mentioned problems. In order to achieve this objective, the present invention:
A transparent hood installed at the bubble-forming liquid application part of the waterproof sheet and forming a closed space between the waterproof sheet and the waterproof sheet, a suction device connected to the transparent hood and sucking air in the closed space, and a suction device using the suction device. The device is equipped with an internal pressure variable means that varies the internal pressure of the closed space during suction.

Note that the bubble-forming liquid consists of a low surface tension solution, etc., and when a pressure difference occurs between the upper and lower sides of the liquid film formed by this solution, the liquid film becomes bubbles due to the pressure difference. It is a solution with properties.

(Function) When detecting a waterproofing defective position using the waterproofing defective position detecting device for a waterproof sheet for buildings according to the present invention, first, a bubble forming liquid is applied to the waterproof sheet stretched over the building, and then, A transparent hood is placed on the bubble-forming liquid application area of the waterproof sheet to form a closed space between the inner surface of the transparent hood and the surface of the waterproof sheet, and the air in the closed space is sucked by a suction device to reduce the internal pressure of the closed space. This is done by lowering the amount.

Therefore, if there is a waterproofing defect in the waterproof sheet, air bubbles will be generated there, and the location of the waterproofing defect can be detected based on the location where the bubble is generated.

Furthermore, by increasing the internal pressure of the closed space using the internal pressure variable means, it is possible to detect a waterproofing defective location with a large cross-sectional area, and it is also possible to detect a waterproofing defective location with an extremely small cross-sectional area by lowering the internal pressure.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the waterproof defective position detection device A shown in FIGS. 1 to 4 will be explained.

The waterproofing defect position detection device A detects the locations of waterproofing defects such as small holes and defective joints in waterproof sheets stretched on concrete walls such as balconies and roofs of buildings. 2,
It is equipped with a bifurcated nipple 3, a hose 4, and a suction device 5.

The transparent hood 1 covers the surface of the waterproof sheet 6 to form a closed space 7, and a plurality of transparent hoods 1 are available in shapes depending on the inspection location.

For example, a transparent hood 1a for inside corners as shown in FIG. 1, a transparent hood 1b for rising parts as shown in FIG. 2, a transparent hood 1 for flat application as shown in FIG.
There is c.

The transparent hood 1a for an inside corner is constructed of a floor surface 9 of a concrete wall 8 on which a waterproof sheet 6 is stretched, and two side wall surfaces 1 that are in contact with the floor surface 9 and in contact with each other at right angles.
This is used to inspect the corner formed by the three sides 0 and 11, with the quarter circle part 12 in contact with both side walls 10 and 11, and the lower end in contact with the floor. The left and right ends are each formed by a quarter cylindrical portion 13 that abuts against side wall surfaces 10 and 11, respectively.

The rising section transparent hood 1b is used to inspect a corner formed by a floor surface 14 and a rising surface 15 rising from the floor surface 14. It is formed by a pair of left and right quarter circular portions 16 that abut, and a quarter cylindrical portion 17 whose upper end abuts against the rising surface 15 and whose lower end abuts against the floor surface 14.

The transparent hood 1c for flat application is used for inspecting flat plate parts 18 such as floor surfaces and side wall surfaces, and is formed by a pair of left and right semicircular parts 19 and a semicylindrical part 20.

These transparent hoods 1 are integrally molded from transparent acrylic resin, vinyl chloride resin, etc., and the entire length of the end is covered with rubber, foam, etc. to improve adhesion to the waterproof sheet 6. Seal 2 is attached.

In addition, the transparent hood 1a for the inside corner is attached to the quarter cylinder part 13, the transparent hood 1b for the rising part is attached to the quarter cylinder part 17, and the transparent hood 1c for flat application is attached to the semicircle part 1.
A nipple screw hole 21 is formed through each of the holes 9.

The bifurcated nipple 3 has a proximal end 22 screwed into the nipple screw hole 21 of the transparent hood 1, and the distal end side is bifurcated,
One end of the hose 4 is connected to the first tip 23 via a hose jointer 25, and the second tip 24 is provided with a variable internal pressure bolt 32.

Note that the outer surface of the hose joint portion 26 of the hose jointer 25 is formed with a conical surface whose diameter decreases toward the distal end, so that regardless of the diameter of the hose 4,
Hose 4 can now be connected.

The variable internal pressure bolt 32 has a narrow notch groove 3.
3 is formed, and the exposed length of the notch groove 33 exposed from the second tip 24 can be adjusted depending on the degree of screw engagement with the second tip 24.

Note that the exposed portion of the cutout groove 33 becomes a communication port that communicates the closed space 7 with the outside air.

Further, the suction device 5 is connected to the transparent hood 1 by a hose 4.

Next, the operation of the embodiment will be explained.

When detecting the waterproofing defective position of a tarpaulin sheet using the waterproofing defective position detection device A, first, bubbles are formed in the inspection area of the tarpaulin sheet 6 by a liquid with low surface tension such as a cleaning liquid such as soap water or synthetic detergent. Apply the liquid with a brush.

Next, the transparent hood 1 is placed in close contact with the bubble forming liquid application surface 27 of the waterproof sheet 6, and the transparent hood 1
A closed space 7 is formed by the inner surface of the bubble forming liquid and the bubble forming liquid application surface 27.

At this time, a transparent hood 1 having a shape that can be adapted to the inspection area is selected from among those having various shapes.

Hereinafter, an explanation will be given using the transparent corner hood 1a, taking as an example a case where an inside corner portion formed by a floor surface 9 and two side wall surfaces 10 and 11 that are in contact with each other at right angles is to be inspected.

Incidentally, the transparent hood 1a for the inner corner has a bifurcated nipple 3 attached thereto in advance, and is placed on the bubble forming liquid application surface 27 with the bifurcated nipple attached.

Then, one end of the hose 4 connected to the suction device 5 is connected to the first tip 23 of the bifurcated nipple 3 via the hose jointer 25, and the suction device 5 is driven to suck the air in the closed space 7. , closed space 7
(See Figure 5).

At this time, if there is a waterproofing defective spot 29 in the waterproof sheet 6 covered with the transparent corner hood 1a, outside air is drawn from the waterproofing defective spot 29 to the closed space 7 due to the differential pressure between the internal pressure of the closed space 7 and the atmospheric pressure. The bubble-forming liquid film 3 formed in the waterproofing defective area 29 as the liquid tried to flow into the water.
0, pressure is applied to the closed space side. Since the bubble-forming liquid has an extremely low surface tension, this pressure causes the bubble-forming liquid film 30 to turn into bubbles 31 and appear on the surface side of the waterproof sheet 6 (see FIGS. 6 and 7).

Here, if the sum of the pressures applied to the entire bubble-forming liquid film 30, that is, the total pressure, is too small, the bubble-forming liquid film 30 will not become bubbles, and if it is too large, it will instantly become bubbles and then burst immediately. Put it away.

Since the total pressure applied to the bubble-forming liquid film 30 is proportional to the surface area of the bubble-forming liquid film 30, that is, the cross-sectional area of the defective waterproofing area, if the differential pressure between the internal pressure of the closed space and the atmospheric pressure is small, for example, bonding over a wide area may be difficult. Even if bubbles occur in a defective area, they may not occur in a small hole with an extremely small diameter, and conversely, if the differential pressure is large, even if bubbles occur in a small hole, the bubbles will burst in a defective joint. It turns out.

Therefore, in this embodiment, the internal pressure variable bolt 32 is loosened to increase the exposed length of the cutout groove 33 to increase the internal pressure of the closed space 7, or conversely, the internal pressure variable bolt 32 is tightened to increase the exposed length. By shortening , and lowering the internal pressure of the closed space 7, the position of waterproofing failure can be detected by the air bubbles 31, regardless of the cross-sectional area of the waterproofing failure area.

Here, the internal pressure of the closed space 7 is 650 to 750 torr (mmHg) in order to detect even small holes with extremely small diameters without peeling off the adhesive or fixation of the waterproof sheet 6.
It is desirable that the Note that 1 atmosphere is 760 Torr, and vacuum is 0 Torr.

In order to maintain this internal pressure, the suction device 5
It is preferable to use one with a suction pressure of 700 torr or more and a suction rate of 0.8 m ³ /min or more because of pressure loss.

As a suction device that satisfies these conditions, there is a suction pump for a vacuum cleaner that is commonly used at home, and inspections can be carried out satisfactorily using this suction pump.

In this way, the presence or absence of air bubbles 31 and the position of air bubble generation within the transparent hood 1a for the inner corner are confirmed,
Finish the inspection of the inside corner.

When moving to the next inspection point, adjust the internal pressure variable bolt 3.
Loosen screw 2 or tighten internal pressure variable bolt 3.
2 from the second tip 24, the closed space 7
Since air flows into the closed space 7 and the internal pressure of the closed space 7 rises to almost atmospheric pressure, the transparent corner hood 1a can be easily separated from the waterproof sheet 6, and the suction device 5
The waterproof defective position detection device A can be moved without stopping its operation.

Regarding other inspection locations, the position of waterproofing failure in the waterproof sheet 6 can be detected by simply replacing the hose 4 with a transparent hood 1 having a shape corresponding to the location, and performing the same operation as in the case of the inside corner.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, in the embodiment, an internal pressure variable bolt was provided at the mouth of the bifurcated nipple as an internal pressure variable means, but a variable air volume valve that changes the air volume from the suction device may be provided in the middle of the hose, or the rotation speed of the motor The suction device may be provided with a motor rotation speed variable device that adjusts the amount of air sucked by the suction device by making it variable.

In addition, the transparent hood is not limited to one whose entire surface is transparent, but may have a transparent portion that allows the entire bubble-forming liquid application area of the waterproof sheet covered by the transparent hood to be easily seen from the outside of the transparent hood when the transparent hood is installed. It's fine as long as it's available.

(Effects of the Invention) As explained above, the waterproofing defect position detection device for a waterproof sheet for buildings according to the present invention is not portable because it is equipped with a transparent hood, a suction device, and an internal pressure variable means. With this simple and simple device, it is possible to confirm in a short time whether or not there is a waterproofing defective portion of the tarpaulin sheet, and if there is a waterproofing defective portion, the position thereof can also be confirmed.

In addition, since the location of waterproofing defects can be detected without filling with water, repairs can be made directly after detecting the location of waterproofing defects, and reconfirmation can be made directly by re-inspecting after repair. You can also do that.

In addition, by adjusting the internal pressure of the closed space using the internal pressure variable means, it is possible to detect the position of a waterproofing defective part having an extremely small cross-sectional area.

Furthermore, by raising the internal pressure of the closed space to atmospheric pressure using the internal pressure variable means during detection, the waterproof defect position detection device can be moved to the next inspection point without stopping the operation of the suction device, making the work easier. The effect of increasing sex is obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a waterproof defect position detection device for a waterproof sheet for buildings according to an embodiment of the present invention, FIGS. 2 and 3 are perspective views showing a transparent hood of the embodiment device,
Fig. 4 is a longitudinal sectional view showing the embodiment device, Fig. 5 is a transverse sectional view showing the usage state of the embodiment device, Fig. 6 is a sectional view showing main part A in Fig. 4, and Fig. 7 is waterproofing. It is a sectional view showing main part A at the time of defective position detection. 1...Transparent hood, 2...Adherence seal, 5...
. . . Suction device, 6 . . . Waterproof sheet, 7 .

Claims (1)

[Scope of Claims] 1. Installed in the bubble forming liquid application part of the waterproof sheet,
A transparent hood that forms a closed space between itself and the waterproof sheet; A suction device that is connected to the transparent hood and sucks air in the closed space; and An internal pressure that changes the internal pressure of the closed space when the suction device sucks air. A device for detecting a position of waterproofing failure in a waterproof sheet for a building, comprising: variable means.