JPH0421940Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a suspension used in the so-called welding waterproofing method, in which face plates made of corrosion-resistant materials, mainly stainless steel, are joined together by seam welding to cover and waterproof the entire target surface. Concerning child improvement.

[Conventional technology]

The welding waterproofing method is a construction method that has been put into practical use relatively recently, but its construction track record is steadily increasing.

This construction method is currently in practical use as a stainless steel waterproofing construction method using a stainless steel face plate, and specifically the method shown in FIG. 4 is used. That is, the face plate 2 used has the right and left end edges raised up, and these are laid out on the surface to be constructed. Then, the side edge raised portions 20, 20 of the adjacent face plates 2, 2 are seam-welded in an overlapping state (the weld bead is indicated by 3), thereby integrating the laid face plates 2... Cover immediately. The fixing of the face plate 2 to the building frame (building frame) 5 is as follows:
The rising part 10 of the L-shaped hanger 1 attached to the building frame is sandwiched between the rising parts 20, 20 of the adjacent face plates 2, 2, and the hanger 1 and the face plate rising parts 20, 20 are joined together through the seam welding described above. Achieved by being fixed.

This waterproofing method is said to have high waterproofness and durability because the highly corrosion-resistant waterproofing material face plate is integrated without intervening foreign matter.

[Problem that the invention attempts to solve]

However, although this construction method is said to have high waterproofness, the both edges 11 of the rising part 10 of the hanger
At the position corresponding to 11, there is a problem that the welding is temporarily interrupted and a jump 30 occurs in the weld line (bead) 3 as shown in the figure. As shown in Fig. 5, when welding is carried out by sandwiching the suspender 1 from both sides with a pair of roller-type electrodes, the part where the hanger 1 is not sandwiched (general part)
There is a step between A ₁ and the sandwiched part (hanger part) A ₂ (hereinafter simply referred to as the boundary part) B and B due to the thickness of the hanger, and in that part there is a gap between the raised parts 20 and 20 of the double-sided boards. This is because there is a tendency for a minute void S to occur. Such weld skipping becomes a starting point for water leakage, and of course poses a problem in terms of strength.

One way to prevent weld skipping is to apply an excessively high welding current to melt the side edges 11 of the hanger to a large extent so that the raised portion 2 of the double-sided plate at the boundary B is
It is conceivable to ensure welding between 0 and 20, but increasing the welding current causes various problems such as embrittlement of the material (face plate), so this method is difficult to adopt in practice.

As a countermeasure against weld skipping, it is also possible to provide both side edge portions 11, 11 of the rising portion 10 of the hanger 1 with double-sided tapers C, C as shown in FIG.
The taper C of the side edge portion 11 prevents an extreme step from being formed at the boundary portion B and a space S between the double-sided board upright portions 20, 20.

Such a suspender (hereinafter referred to as a tapered suspender)
This is certainly effective in preventing welding skips, and can prevent welding skips without using a particularly high current, but this has a fatal problem in terms of strength. That is, when wind flows over the constructed face plate 2..., an upward suction force (hereinafter referred to as peeling force) acts on the face plate. The hanger must be able to withstand this peeling force. However, since the side edge 11' of the tapered hanger is thin like a cutting edge,
It has poor resistance to peeling, and there is a risk that even a relatively small peeling force will cause cracks to form around the welds on the side edges. Once a crack occurs, stress will be concentrated in that area and it will not take long for the entire hanger to break.

In addition, the hangers are originally extremely thin, about 0.3 to 0.4 mm, and adding a taper to them is impractical due to the difficulty of machining, or at least not suitable for mass production.

As described above, the tapered hanger has extremely poor practicality.

The present invention is a welding waterproofing method that has the same excellent effect on weld skipping as the tapered hanger described above, has sufficient strength against the peeling force that acts during construction, is easy to manufacture, and is suitable for mass production. The purpose is to provide hangers for use.

[Means for solving problems]

As shown in FIG. 1, the hanger of the present invention is characterized in that at least the welding portions 11a, 11a of both side edge portions 11, 11 of the rising portion 10 are formed in a waveform (the waveform portion is indicated by 12). It has characteristics.

[Effect]

In the suspender having the above shape, during welding, the pressure applied by the pair of roller-type electrodes 4, 4 at the boundary B between the general part _A1 and the suspender part _A2 is
The welding heat input is concentrated in a small area of the corrugated portion 12 of the side edge portion 11, and at the same time, the current is concentrated in that portion, increasing the welding heat input. When the pressurizing force is concentrated, there is a noticeable tendency for that part to be crushed, and an increase in welding heat input promotes melting of that part. In the hanger of the present invention, as a result of these effects being combined, a space is created between the upright portions 20 and 20 of the double-sided plates at the welding part of the boundary B as shown in FIG. 3, without requiring a particularly high current. = Complete welding without S is ensured, and stable and good welding without weld skipping can be realized.

The hanger of the present invention also has sufficient strength against the action of peeling force after installation, and does not allow the side edges 11 to become a point of origin for damage, unlike tapered hangers. There is no.

Moreover, the shape of the side edge of the hanger of the present invention (wavy)
can be easily provided by punching, and the hanger of the present invention is easy to manufacture and has high mass productivity.

〔Example〕

1A and 1B show two embodiments of the present invention, in which A is a case in which the waveform of the side edge portion 11 is formed over the entire length, and B is a case in which the waveform is formed in the welding area 11a. It was formed only in

Both examples A and B are formed entirely from a single plate, and have an L-shaped cross section consisting of a base portion 13 and a rising portion 10 rising at right angles from the base portion 13.
A hole 14 is provided in the center of the base portion 13, and the base portion 13 is attached to the frame by inserting and fixing an anchor bolt through the hole 14 into a pre-drilled hole in the frame, for example.

In addition, if the rising part 20 of the panel material 2 is high and bent into multiple stages, the hanger can be attached to a tight frame, etc., and this tight frame can be fixed to the frame, so that the hanger can be used indirectly. is fixed to the skeleton.

The rising portion 10 has side edge portions 11, 11,
Waveforms are given to each of A and B as described above. Here, the pitch P of the corrugated portion 12 is not particularly limited, but if it is too large, the effect of concentrating the pressing force and promoting melting described above will be weakened, which is not preferable. Specifically, it is preferable to reduce the width by about 1 to 2×w relative to the width w of the weld bead to be formed (see FIG. 4). However, due to processing problems,
It is preferable that the pitch P be within a range of about 3 mm or more.

Note that basically any shape of the waveform may be adopted. In addition to the semicircular wave shown in Figure 1,
There are triangular and sinusoidal waves shown in Figure 2 A and B, as well as modified versions thereof, such as a semicircular wave with a slight parallel portion 12c at the top as shown in Figure 2 C. Can be adopted. However, from the perspective of avoiding stress concentration caused by peeling force,
It is desirable that the shape has no steep corners in the valley portion 12b.

The corrugated area in the example shown in FIG. Refers to a wide range that allows for construction errors within the allowable range.

The hanger of the present invention as described above is manufactured by punching out a flat plate with corrugated portions 12, 12 from a flat plate material of a required thickness and bending the plate into an L shape.

[Effect of idea]

As explained above, the hanger of the present invention has the following features and advantages.

During welding, it is possible to reliably prevent the weld line from popping out at the boundary B, and highly reliable waterproofing can be achieved. Moreover, in this case, an excessive welding current is not required, and problems such as material (face plate) embrittlement are not caused.

In the construction state, it has sufficient strength even against the peeling force acting through the face plate, and does not easily crack like the above-mentioned tapered hanger.

In addition, the waveform on the side edge portion can be easily provided by punching, making it easy to manufacture and suitable for mass production.

Therefore, the hanger of the present invention greatly contributes to improving the reliability and practicality of the welding waterproofing method.

[Brief explanation of the drawing]

FIGS. 1A and 1B are perspective views showing two embodiments of the present invention. FIGS. 2A to 2C are explanatory diagrams showing various modifications of the side edge (waveform) shape of the hanger of the present invention. FIG. 3 is an enlarged view schematically showing the welding situation when using the hanger of the present invention. FIG. 4 is a perspective view illustrating the welding waterproofing method. FIG. 5 is an enlarged view schematically showing a welding situation when using a conventional hanger. FIG. 6 is a perspective view showing the tapered hanger. In the figure, 1...hanger, 2...face plate, 3...welding line (bead), 10...raiser part, 12...corrugated part, 13...hanger base, 20...face plate stand. Raised part, 30... Jump of weld line, B... Boundary part, S...
...Empty〓.

Claims (1)

[Scope of utility model registration request] The base portion 13 is fixed directly or indirectly to the frame, and the rising portions 10 bent in an L shape relative to the base portion 13 are connected to the rising portions 20 and 2 of the adjacent face plates 2.
In the hanger that fixes the face plate 2 to the frame by sandwiching and welding between the
At least the welding planned portions 11a, 11 of 1 and 11
A hanger used in a welding waterproofing method, characterized in that a is formed in a wave shape.