JPH0639831B2 - Waterproofing method with metal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a waterproofing method using a metal plate such as a roof of a building or a rooftop, in particular, a seam welding method of seaming an upright portion of an adjacent waterproofing surface material. The present invention relates to a method for preventing distortion of a waterproof surface material.

[Conventional technology]

BACKGROUND ART For waterproofing a roof on a flat part such as a roof of a building, a method of laying seam-welded waterproof metal surface plates, in particular, waterproof metal surface members made of a stainless steel thin plate has been widely used. In this construction method, generally, rising portions are provided on both side ends of the metal waterproof surface material, the waterproof surface materials are juxtaposed, and the rising portions are seam welded together with the hanging members fixed to the body.

[Problems to be solved by the invention]

However, in such a conventional waterproofing method, welding distortion occurs due to heat shrinkage in the welded portion of the rising portion of the waterproof surface material,
Not only does it cause warping, swelling, unevenness, etc. on the upright portion, but it also gives stress and deformation to the suspension fixed to the body, and it also has unevenness on the flat surface of the waterproof surface material that has not contracted. There are many problems such as wrinkles and the like, which significantly impairs the appearance and deteriorates the discharge of rainwater.

Further, in order to solve such a problem, a method of rolling the welded rising portion was considered, but it is not only extremely difficult to roll the welding portion, and the reliability of the welding portion is Moreover, even if the welded part can be stretched to its original state, it is almost impossible to recover the wrinkles and warps of the flat surface that once occurred, so it is not put to practical use. It was

The present invention solves such a problem, prevents the occurrence of welding distortion due to seam welding of the rising portion of the waterproof surface material, and suppresses the occurrence of uneven wrinkles due to the ripple to the flat surface portion of the waterproof surface material, It is an object of the present invention to provide a new waterproofing method which has a good appearance, has a good drainage property, and can reduce the burden on the suspension.

[Means for solving problems]

The present invention relates to a waterproofing method of adhering adjacent metal waterproof surface members to each other by seam welding at the end rising parts thereof, and in the waterproofing method, the rising parts of the adjacent metal waterproof surface members are projected on the body at intervals. A waterproofing method using a metal plate, characterized in that after welding, the rising portions of the joined metal waterproof surface materials are stretched by a rolling roller, and then the stretched compatible upper portion is subjected to seam welding. Is.

In the waterproofing method by laying the metal waterproof surface material, it is practiced to project many hangings at intervals on the upper surface of the body and fix the metal waterproof surface material to this.
Also in the present invention, first of all, the adjacent rising portions of the respective metal waterproof surface materials are joined by sandwiching the hanger by this means, and the hanger and the rising portion are fixed by spot welding.

Next, a rolling roller is attached to the outer side surface of the coexistent upper part that is joined, and the rolling roller is run while pressing it strongly along the seam welding line of the rising part, and the rising part between the fixed hanging parts is fixed. Stretch. In the present invention, the step of stretching the rising portion is the most important. Generally, the elongation of the rising portion due to this stretching is preferably around 3%. Due to this stretching, the upright portions between the suspension members are slightly wavy and curved, but this does not hinder the seam welding performed after this step.

After the rising of the rising portion by the rolling roller is performed, the rising portions of the adjacent metal waterproof surface materials are bonded to each other by seam welding. A conventionally known method can be adopted for this seam welding. That is, a seam welder is used, and the pair of roller electrodes sandwiches the rising portion to run, whereby the rising portions can be welded to each other and to the hanger.
As a result of this seam welding, heat contraction occurs at the rising portion, but since the rising portion is stretched as described above, this heat contraction is offset, and the rising portion is spot-welded to the suspension almost at the beginning. You will return to the same state as when you did.
Therefore, since the rising part is almost not stretched or contracted as a result, it is prevented that ripples are generated on the flat surface part of the waterproof surface material other than the rising part, which causes wrinkles of unevenness. The metal waterproof surface material thus produced maintains a flat surface and has a good appearance, and the drainage of rainwater becomes good.

〔Example〕

 Next, examples of the present invention will be described more specifically.

On the surface of the flat construction frame by placing concrete,
Thickness 0.4mm, width 455mm, length 8500mm, height of both ends upright
25 pieces of waterproof surface material made of SUS304 stainless steel plate are juxtaposed, and each waterproof surface material is joined by sandwiching the hangers fixed at intervals of 600 mm on the work frame, and spot welding is performed at the location of the hangers. The waterproof surface materials were attached to each other and the hanger.

Next, set the portable traveling type rolling mill on the rising part where each waterproof surface material is joined, and sandwich the rising part with a pair of rollers for 300k.
While the pressure of g / cm ² was being applied, the rolling mill was run, and the rising part between each hanger was stretched. The elongation at that time was set to about 3%.

After that, using a portable seam welder,
Seam welding was performed at a weld temperature of 1550 ° C and a welding speed of 1.3 M / min.

As a result, the rising part, which was curved between the suspenders due to the stretching of the rising part, returns to the original straight shape due to the heat shrinkage due to seam welding, and the flat surface part of the waterproof surface material is distorted due to the heat shrinkage and unevenness. It was confirmed that there was almost no good finish.

〔The invention's effect〕

As described above, in the present invention, in the waterproofing method using a metal plate, prior to seam welding of juxtaposed waterproof surface materials, the waterproof surface material rising portion that is the welding point is stretched, and then seam welding is performed. Therefore, the heat shrinkage generated by seam welding is offset by the stretched amount, and the deformation due to welding strain can be substantially prevented, and therefore, the spread of strain to the flat surface portion due to the strain at the rising portion can be prevented. The result is a good finish with almost no wrinkles and swells on the flat surface that could not be avoided after welding in the past, and the drainage is good and the load on the suspension can be reduced.
That is an excellent effect.

Claims (1)

[Claims] 1. A waterproof method for adhering adjacent metal waterproof surface materials to each other by seam welding the rising parts of their ends,
Weld the rising parts of the metal waterproof surface material to the suspensions protruding from the frame at intervals, then stretch the joined rising parts of the metal waterproof surface material with rolling rollers, and then seam weld the rising parts. Waterproofing method using a metal plate, which is characterized by applying.