JPS5848705B2 - Curtain wall drainage structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drainage structure for a curtain wall.

In conventional curtain walls, two joint materials are placed between each exterior material.
The tunnel-like voids formed between the joint materials are either open at the end, or are long and continuous and open to the outside through drainage holes here and there. Ta.

In the former case, the air pressure inside the gap is equal to that inside, and a pressure difference occurs between the outside and the inside of the gap or the outside seal, and if the outside seal breaks, rainwater will infiltrate.

In the latter case, since the wind pressure differs depending on the location, the local external pressure and the pressure inside the gap do not necessarily match if the local area is located away from the drain port, and the external seal If the pipe breaks, rainwater may enter and cause the exterior material to become damp.

The present invention solves these problems, and one embodiment thereof will be described below with reference to the drawings.

Reference numeral 1 denotes exterior materials arranged adjacent to each other in the vertical and horizontal directions, and each exterior material 1 is fixed to a mounting material 3 of a building structure (not shown) via protrusions 2 protruding from the back surface thereof. ing.

The exterior material 1 has flanges 4 around its four circumferences, and the primary joint material 5 and the secondary Two layers of joint materials 5 and 6 with joint material 6 are interposed apart from each other.

The secondary index material 6 is located between the end face of one flange 4 and the secondary protrusion 4a of the other flange 4.

A backup material 7 that engages with the step 8 of the flange 4 is arranged inside the primary joint material 5, and between this backup material 7, the secondary joint material 6, and both flanges 4, each exterior material 1 A void 9 is formed that extends horizontally and vertically.

Thus, the void 9 is closed by the plug materials 16 and 17 at the center position of the bottom side of the exterior material 1 and at the upper end position of the side side.
As a result, an inverted T-shaped unit closed space 9l is created for each exterior material 1.
It is formed at the corner of the

Each of these unit closed spaces 9' communicates with the external space through a communication passage 15, respectively.

That is, the flange 4 on the upper side of the exterior material 1 is provided with a first hole 10 that opens into the void 9 near the side end of the exterior material 1, and the flange portion 4 on the side is provided with a first hole 10 that opens into the gap 9 from the primary joint material 5. A second hole 11 is also provided which opens into the groove 20 externally.

The first hole 10 on the top side is formed by a short pipe 12, and the second hole 11 on the side side communicates with a curved path 13a of a connecting protrusion 13 protruding from or fixed to the back surface of the exterior material 1.

The curved path 13a and the short pipe 12 are connected by a flexible pipe 14, and the flexible pipe 14 and the hole 10
, 11, etc., are provided with a communication path 15.

On the outer wall surface, the wind pressure differs from place to place and changes from time to time, but with the above configuration, it is possible to equalize the outer wall surface pressure and the unit closed cavity internal pressure at each place through the communication passage 15. If the primary joint material 5 is broken, the force of external rainwater being sucked into the gap 9 through the broken part of the primary joint material 5 can be eliminated.

Furthermore, if water enters the space 9, it can naturally fall through the passageway 15 and drain to the outside.

In this case, since there is no airflow flowing from the outside to the inside through the communication path 15, water will not flow back.

Further, when the gap 9 is divided as described above, when inspecting for leakage of the seal to the outside, it is sufficient to inspect each unit closed gap 9', so that the inspection can be easily performed.

In the above embodiment, the unit closed spaces 9l were formed at each corner of each exterior material 1, but the unit closed voids 9l may be provided over an appropriate number of exterior materials 1.

As explained above, even if the primary joint material breaks, the present invention eliminates the force of rainwater infiltrating the back of the primary joint material, and even then, the water that has entered the back of the primary joint material can be drained smoothly. , it is possible to effectively prevent moisture of the exterior material etc. due to water leakage.

In addition, in the event of water leakage, the joint material can be inspected for each unit closed gap in the vicinity, so the inspection range is narrowed and the inspection can be carried out easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an explanatory diagram showing the arrangement of the exterior material, FIG. 2 is a vertical sectional view of the connection part of the exterior material, and FIG. 3 is a horizontal view of the connection part. cross section of the direction,
Figure 4 is the same oblique view. 1... Exterior material, 4... Flange, 5,
6...Glut material, 7...Backup material, 9...Void 9/...Unit closed gap, 10, 11...Hole , 15... Transportation channel, 16, 17... Plug material, 20... Groove.

Claims (1)

[Claims] 1. Exterior materials having flanges on four circumferences are placed adjacent to each other vertically and horizontally, and at least two layers of joint material are placed in the grooves formed by the flanges that are continuous in the horizontal and vertical directions. interposed so that a gap is formed between the flanges to form a continuous gap in the horizontal and vertical directions,
The continuous spaces are closed in appropriate ranges to form a plurality of unit closed spaces, and the flange is provided with a first hole that opens into the unit closed space, and the groove is located outside of the two layers of joint material. 1. A drainage structure for a curtain wall, characterized in that a second opening hole is provided, and the first hole and the second hole are communicated through a communication path.