JPS6126493Y2 - - Google Patents

Description

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

Curtain wall members, which are the outer walls of current buildings, are provided with joints of appropriate width in consideration of 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. Deterioration is accelerated by movement caused by thermal expansion and contraction of large panels, and there are noticeable cases where the sealant itself breaks or the adhesive surface peels off sooner than expected, necessitating repairs.

When a defect occurs, rainwater flowing down the surface of the curtain wall member is forced into the joint through the gap between the defects due to wind pressure and 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 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 to not rely solely on the material, and even if some defects occur, it is inherently difficult for rainwater to enter the room. Rather than thinking that the material blocks both rainwater and wind,
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.

In other words, a water return mechanism is installed inside the joint without sealing the joint opening, and
In addition, a method is being proposed in which a wind barrier is installed on the indoor side of the joint to reduce the energy of rainwater entering the joint by drawing it into the interior 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 longitudinal cross-section of the joint between the curtain wall members 1 and 1' that are stacked on top of each other in this case. , after forming a vertical groove 3 of a predetermined length by standing up from the middle of the depth, it turns horizontal and the horizontal groove 4 comes out to the inside of the opposite side, and the vertical groove 3 or the horizontal groove 4 is filled with, for example, a nylon scrubber or a loofah. A breathable joint material 5 made of a continuous porous elastic material such as the above is tightly fitted. At first glance, this embodiment appears to block the passage inside the joint against equal pressure, but equal pressure is ensured by ventilation through the permeable joint material 5. Furthermore, joint material 5
The intrusion energy of rainwater that tries to pass through the continuous pores is channeled into a detour, reducing its consumption. In the figure, 6 is a draining recess formed on the top wall of the inclined groove 2, and 7 is a wind barrier that closes the indoor opening of the joint.

As mentioned above, the main problem is that infiltrated rainwater consumes most of its energy even in the vertical groove 3, and
The joint material 5, which is placed in a blocked position in the middle of the inner joint passageway, guarantees durability without becoming brittle due to the effects of heat or ultraviolet rays by placing it in a position that is protected from direct sunlight. Since the intrusion energy is completely reduced while maintaining the energy level, the intrusion is prevented, and the simple structure exhibits excellent rationality.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a joint portion. 1, 1'... Curtain wall member, 2... Inclined groove, 3... Vertical groove, 4... Horizontal groove, 5... Breathable joint material, 6... Draining recess, 7... Window.
barrier.

Claims (1)

[Scope of utility model registration request] The joint structure is such that a gently sloping groove from the outside rises from the middle of the entrance depth to form a vertical groove of a predetermined length, then turns horizontally and exits to the inside as a horizontal groove. A waterproof structure for the side joints of a curtain wall that applies isobaric theory, characterized by tightly fitting joint material made of continuous poroelastic material and further providing a wind barrier at the indoor opening of the joints.