JPH0412786B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a waterproofing method for waterproofing a roof or a room by laying metal plates. However, in this specification, the term "waterproofing method using metal plates" is used in a broader sense, including not only a simple waterproofing method, but also a waterproofing method that is used also as a roof.

[Prior art and its problems] A waterproofing method using stainless steel plates has been developed. This construction method is strong and has excellent waterproofing effects.
It has already been used in many applications such as waterproofing the roofs of large buildings and under floors of indoor pools and bathrooms. However, although this construction method has excellent features, its widespread use is hampered by the high construction cost and large heat shrinkage distortion during construction.

That is, in the conventional construction method, stainless steel plates are raised at the boundary portions to make surface contact, and the raised portions are connected by seam welding. Seam welding of stainless steel is done by heating it to a high temperature of over 1500℃. Even if a copper plate is used instead of a stainless steel plate,
Welds by heating to a high temperature of 1000℃ or more. Seam welding using high temperature heating typically requires as much as 70kVA of power.
Furthermore, it is not possible to eliminate the shrinkage distortion of the metal plate that occurs during high-temperature heating. High-power seam welding machines are supplied with power through thick power lines, but the thick power lines prevent the seam welding machine from moving freely on the roof, significantly reducing work efficiency. Furthermore, when running thick power lines from a generator on the ground to a seam welding machine on a high roof, the weight of the wire becomes unimaginably heavy, which also reduces work efficiency.

Furthermore, the entire surface of the heat-shrinked metal plate becomes wavy and distorted, and compared to other waterproofing methods, it is not possible to construct a metal plate with a beautiful surface.

Furthermore, the metal plates used in the waterproofing method are treated in advance by applying conductive paint to the surface at a processing factory, but most of the surface paint disappears during seam welding, which is heated to temperatures exceeding 1000 degrees Celsius. Also, the metal surface is oxidized.

This invention was developed with the aim of eliminating these conventional drawbacks.The important objectives of this invention are that low temperature welding is possible, the power consumption of the welding device is low, and the power can be obtained using thin and light wires. To provide a waterproofing method using a metal plate that can be supplied, the entire electric wire is light and easy to bend, and the welding device itself is simple and lightweight, so that the efficiency of welding work can be significantly improved.

Another important object of this invention is to provide a waterproofing method using metal plates that can minimize distortion of metal plates after welding because the contact parts can be welded at low temperatures, and that allows beautiful metal plates to be constructed neatly without distortion. is to provide.

Furthermore, another important object of the present invention is to provide a waterproofing method using a metal plate that has a low welding temperature and can minimize thermal oxidation of the front and back surfaces of the metal plate during welding.

[Means for solving conventional problems] The waterproofing method using metal plates involves bringing the metal plates into surface contact with each other along the boundary edges, and welding the contact surfaces by pressurizing and heating the contact areas from both sides. and connect.

The contact surface of the metal plate is coated in advance with a thermoplastic polymer material that melts at a temperature lower than the melting point of the metal plate itself. Thereafter, the metal plate coated with the thermoplastic polymer material is brought into surface contact along the boundary, and is heated under pressure from both sides to melt and weld the coating layer of the thermoplastic polymer material.

[Operation and Effect] Metal plates whose contact surfaces are coated with a thermoplastic polymer material can be welded at a significantly lower heating temperature than seam welding, which welds the metal plates themselves. Therefore, compared to conventional seam welding, the power consumption of the welding device is significantly lower, and power can be supplied using thin wires. Thin wires are light and easy to bend, and the welding equipment itself is simple and lightweight, so welding efficiency can be significantly improved.

Furthermore, since welding can be performed at low temperatures, heat welding can be performed using fuel such as propane instead of electricity.

Furthermore, the fact that the contact parts can be welded at low temperatures,
By minimizing the distortion of the metal plate after welding, beautiful metal plates can be neatly constructed without distortion, and furthermore, thermal oxidation on the front and back sides of the metal plate during welding can be minimized.

[Preferred Embodiments] Hereinafter, embodiments of the present invention will be described based on the drawings.

The waterproofing method using the metal plate of the present invention is similar to the conventional method, as shown in FIG.
are brought into surface contact with each other along the boundary edge, and the surface contact portions are pressurized and heated from both sides to weld and connect the contact surfaces.

The metal plate to be heat welded is not melted itself, but the thermoplastic polymer material layer 3 on the surface is melted and welded. Therefore, the metal plates 1 and 2 are
Before heat welding, a thermoplastic polymer material layer 3 melts the contact surface at a temperature lower than the melting point of the metal plate itself.
After that, the metal plates 1 and 2 coated with this thermoplastic polymer material layer 3 are brought into surface contact along the boundary, and this is heated under pressure from both sides to melt the thermoplastic polymer material layer 3. and weld.

A thermoplastic polymer layer 3 is coated on the surface of the metal plates 1 and 2 to weld them together. Therefore, normally, it is only necessary to attach it to the contact surfaces of the metal plates 1 and 2. However, when the entire surface of the metal plate is coated with the thermoplastic polymer material layer 3, it is possible to easily weld the cut edges no matter where the metal plate is cut. Therefore, in a preferred embodiment, the entire surface of the metal plate is coated with a thermoplastic polymeric material.

As the thermoplastic polymer material, any polymer material having a melting point lower than that of the metal plate, such as asphalt or thermoplastic synthetic gun fat, can be used singly or in multiple layers.

The method of attaching a thermoplastic polymer material to a metal surface involves heating and melting the thermoplastic polymer material to adhere it to the metal surface.
Any method capable of adhering the thermoplastic polymeric material to the metal surface can be used.

The thermoplastic polymer material is brought into close contact with the thermoplastic polymer material by a method that is optimal for the respective materials of the metal plate.

A stainless steel plate, a copper plate, an aluminum plate, or a steel plate can be used as the metal plate, but a corrosion-resistant metal plate such as a stainless steel plate, a copper plate, or an aluminum plate is optimal.

The easiest way to attach a thermoplastic polymer material to a certain thickness on the surface of a metal plate is to place the thermoplastic polymer material in a container, heat it to melt it, and then immerse the metal plate in this to heat it. A plastic polymer material is attached, cooled and dried.

The thermoplastic polymer material is reliably attached to the metal plate through ordinary pretreatment processes such as degreasing, pickling, neutralizing water washing, drying, mechanical polishing, and re-degreasing.

By the way, lead has extremely strong corrosion resistance against certain chemicals such as sulfuric acid. Therefore, lead plates whose surfaces are coated with asphalt can be used for waterproofing certain buildings such as chemical factories.

Furthermore, a metal plate using a lead plate can be used in an X-ray room to provide an X-ray shielding effect.

The thickness of the thermoplastic polymer material is usually adjusted to a range of 0.1 to 5 mm, preferably 0.2 to 3 mm, so that it melts and welds the metal plate.

The present invention does not specify the state in which the metal plates are brought into surface contact; for example, as shown in FIGS. 1 and 2,
Adjacent metal plates 1 and 2 are placed one on top of the other in surface contact, and the overlapped portion is heated from both sides while being sandwiched, and the thermoplastic polymer material layer 3 in the contact portion is heated and melted and welded.

As shown in FIG. 1, when the metal plates 1 and 2 are bent upward at the boundary connection part and the back surfaces of the adjacent metal plates 1 and 2 are brought into surface contact with each other and welded, the enlarged view of FIG. As shown, the thermoplastic polymer material layers 3 on the lower surfaces of the metal plates 1 and 2 are brought into surface contact and melted and adhered.

As shown in FIG. 1, when the fixing piece 4 is sandwiched between the metal plates 1 and 2 at a constant interval, as shown in FIG.
It is good to keep close contact with it.

The fixing piece 4 is fixed to the base with a stopper 12.

Moreover, as shown in FIGS. 4 and 5, at the boundary connecting portions of metal plates 6 and 7, metal plates 6 and 7, 8 and 9
Even when the thermoplastic polymer material layers 10 and 11 are brought into contact with each other and melted and bonded together, the thermoplastic polymer layers 10 and 11 can be melted and bonded together.

As shown in FIG. 5, when the thermoplastic polymer material layer 11 is welded to both sides of the metal plates 8 and 9, the metal plates 8 and 9 can be used without facing each other, and they can be bent in any condition to make surface contact. Even in this case, the thermoplastic polymer material layer 11 makes surface contact.

As shown in FIG. 1, the thermoplastic polymer layer can be welded over a wide area to increase adhesive strength.

As shown in FIGS. 1, 4, and 5, the metal plate is preferably welded by bringing the thermoplastic polymer layers 3, 10, and 11 into contact with each other. However, if the thermoplastic polymer material layer is asphalt, the thermoplastic polymer material can be heat-welded directly to the metal plate, so it is also possible to closely adhere the thermoplastic polymer material to one side of the metal plates that are in surface contact with each other. .

Furthermore, as shown by the chain line in FIG. 5, it is also possible to improve the waterproofness of the wrap by applying a thermoplastic polymer material such as asphalt along the upper surface of the wrap.

Furthermore, when the surface of a metal plate is directly exposed outdoors, it is recommended to cover the surface with aluminum foil or apply silver or white paint to prevent sunlight from reflecting and raising the temperature of the thermoplastic synthetic resin layer. Good. In particular, when a dark-colored material such as asphalt that easily absorbs solar heat and is easily softened by the absorbed heat is used for the thermoplastic synthetic resin layer, the sunlight reflective layer has the effect of preventing temperature rise. However, when a waterproof metal plate is buried in concrete, a sunlight-reflecting layer is not required.

[Brief explanation of drawings]

Figures 1, 4 and 5 are cross-sectional views showing an example of the construction state of the present invention, Figure 2 is an enlarged cross-sectional view of the surface contact portion of the metal plate, and Figure 3 is a cross-sectional view showing an example of the construction state of the present invention. FIG. 3 is an enlarged cross-sectional view of a portion where a metal plate is welded. DESCRIPTION OF SYMBOLS 1... Metal plate, 2... Metal plate, 3... Thermoplastic polymer material layer, 4... Fixed piece, 5... Thermoplastic polymer material layer, 6
...metal plate, 7...metal plate, 8...metal plate, 9...metal plate, 10...thermoplastic polymer material layer, 11...thermoplastic polymer material layer, 12...stopping material.

Claims (1)

[Claims] 1. Bringing the metal plates into surface contact with each other along the boundary edge,
In a waterproofing method that uses metal plates that apply pressure and heat to the contact areas from both sides and weld and connect the contact surfaces,
The contact surface of the metal plate is coated with a thermoplastic polymer material that melts at a temperature lower than the melting point of the metal plate itself, and then the metal plate coated with this thermoplastic polymer material is brought into surface contact along the boundary. A waterproofing method using metal plates, which is characterized by pressurizing and heating the metal plates from both sides and melting and welding a coating layer of thermoplastic polymer material to connect the metal plates in a watertight manner. 2. A waterproofing method using the metal plate according to claim 1, wherein asphalt is used as the thermoplastic polymer material. 3. A waterproofing method using the metal plate according to claim 1, in which a thermoplastic polymer material is adhered to a thickness of 0.1 to 5 mm. 4. A waterproofing method using the metal plate according to claim 1, in which a thermoplastic polymer material is heated and melted to adhere to the metal surface. 5. A waterproofing method using a metal plate according to claim 1, wherein both sides of the metal plate that make surface contact at the boundary are coated with a thermoplastic polymer material. 6. Use of the metal plate according to claim 1, in which the boundary connecting portion of the metal plate is bent upward so that the back surfaces of adjacent metal plates are brought into surface contact with each other, and the metal plates are welded using a thermoplastic polymer material. Waterproofing method. 7. A waterproofing method using a metal plate according to claim 1, in which the metal plate is wrapped vertically at the boundary connecting portion of the metal plate and a thermoplastic polymer material is welded. 8. A waterproofing method using a metal plate according to claim 1, wherein the metal plate is a stainless steel plate, a copper plate, an iron plate, or an aluminum plate.