JPH0232725Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the proposal of a waterproof structure for the vertical joints of a curtain wall by applying the isobaric theory.

Curtain wall members used for the exterior walls of buildings are provided with joints of appropriate widths, taking into account displacement during earthquakes and expansion and contraction of the members due to changes in temperature and humidity.

At the same time, in most cases, a synthetic rubber paste sealant is filled in to prevent rainwater from entering the area.

However, since this sealant is exposed to direct sunlight and wind and rain, its long-term durability is susceptible to embrittlement due to the effects of heat and ultraviolet rays, which are common shortcomings of organic materials, and it is also susceptible to earthquakes and There have been noticeable cases of the sealing material itself breaking or peeling at the adhesive surface sooner than expected due to the deterioration of the movement due to thermal expansion and contraction of large panels, necessitating repairs.

When a defect occurs, rainwater flowing down the surface of the curtain wall member is forced into the joint through the gap in the defect due to wind pressure or capillary action.

In the case of many buildings, in anticipation of this phenomenon, systems are installed to drain rainwater that has entered the interior of the joint without allowing it to enter the room, such as by installing depressurized spaces, water return stands, secondary side seals, etc. inside the joints. However, considering the wind and rain conditions and construction errors,
The reality is that it is far from sufficient.

Furthermore, in the case of high-rise buildings, it is clear that the cost will be enormous, as the length of sealant filling is extremely long and the repair work must be performed at high places.

In the future, it is hoped that sealing materials with even greater durability will be developed, but it is important not to rely solely on the material, and even if some defects occur, it is essentially difficult for rainwater to enter the room. Rather than thinking that the material blocks both rainwater and rain,
There is a need to develop a joint mechanism that achieves equal atmospheric pressure by allowing ventilation between the outside and the interior space of the joint, preventing rainwater by using the shape of the joint and water return material, and blocking wind at a location where rainwater cannot reach. occured.

That is, proposals are being made that do not require a sealant to close the joint opening, provide a water return mechanism inside the joint, and provide a wind barrier on the indoor side of the joint.

However, the factors behind rainwater infiltration are extremely complex, and the reality is that existing water returning mechanisms are not sufficiently effective.

This proposal was made in view of the circumstances mentioned above, and the details will be explained below based on the diagram.

Figure 1 shows a planar cross-section of the joint between adjacent curtain wall members 1 and 1' that can be applied in this case.At the middle of the depth of the joint, there is a joint made of an elastic material such as synthetic rubber or synthetic resin. In addition, a wide part 3 is formed in front of the joint material 2, and ventilation holes 4, 4' with the inside side sloped upward from here to the back of the joint material 2 are inserted into the curtain wall. Part 1,
1'.

5 is a wind barrier that closes the indoor opening of the joint.

In the figure, U indicates the outside, and I indicates the inside.

Since this project is constructed as described above, infiltrated rainwater is rapidly dispersed in the wide part 2, its energy is reduced, and its infiltration is prevented by the joint material 2 that completely blocks the passage. Ru.

It should be noted that equal pressure is ensured by the ventilation holes 4, 4', and since the ventilation holes 4, 4' are sloped with their inner sides facing upward, they do not allow rainwater to enter.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a plan cross-sectional view of the joint portion. 1, 1'... Curtain wall member, 2... Joint material, 3... Wide part, 4, 4'... Ventilation hole, 5...
...wind barrier.

Claims (1)

[Scope of utility model registration request] A joint material made of elastic material is tightly fitted in the middle of the depth of the joint, and a ventilation hole is drilled in the curtain wall member with the inside sloped upward from the wide part placed at the front of the joint material to the back. , a waterproof structure for vertical joints of curtain walls that applies isobaric theory, which is characterized by the provision of a wind barrier at the indoor opening of the joints.