JPS6149463B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproofing device between joints in a curtain wall or the like constituting the outer wall of a building.

Conventionally, for waterproofing devices between joints such as curtain walls, sealants are installed on the indoor and outdoor sides between the joints, and the sealant on the outdoor side is basically responsible for airtightness and watertightness. It's like this. However, in such conventional equipment, the sealing material on the outdoor side is subjected to severe loads due to direct sunlight and expansion and contraction between joints, and is also directly exposed to wind and rain.
The reality is that the rate of deterioration is quite fast. As a result, there is a risk that rainwater will eventually enter the room.

Furthermore, waterproof devices have been proposed that attempt to prevent rainwater from entering by omitting the sealing material on the indoor side, but it is difficult to prevent the intrusion of rainwater only by using the sealing material on the indoor side.

Thus, the present invention was devised to solve these conventional problems, and the present invention will be explained below based on embodiments shown in the drawings.

This invention is mainly implemented as a waterproofing device between the joint parts when connecting the upper and lower precast panels A and A of reinforced concrete structure.

The upper and lower precast panels A and A, which have joint portions formed in a phase-cut shape, are stacked one on top of the other with a predetermined interval. An indoor sealing material 1 is interposed on the indoor side between the joints. Further, a basic sealing material 2 having a shape that follows the joint end face of the precast panel A located below is attached to the joint end face. This attachment method includes attachment with adhesive, physical attachment, and attachment using a combination of adhesive and physical attachment, and any attachment method may be used.

Basic seal material 2 is placed near the outdoor side of basic seal material 2.
A rising piece 3 rising upward is integrally formed. The rising piece 3 shields the joint between the upper and lower precast panels A, A.

The above-mentioned indoor side sealing material 1 and this rising piece 3 will eventually form a joint space C.

By the way, in this invention, an air introduction path 4 is formed which communicates the joint space C with the outside air.

The formation of the air introduction path 4 is not limited in any way, and it may be formed by providing a notch in the precast panel A that communicates the joint space C with the outside air, or it may be formed by providing the basic sealing material 2. rising piece 3
It may be formed by drilling a through hole in the precast panel A, or it may be formed by embedding a pipe with both ends open in the precast panel A.

Here, a case will be described in which a notch is provided in the precast panel A to form the air introduction path 4.

Although there is no limitation on the position where the notch is formed, it is preferable to form the precast concrete A at a position where the notch can be easily cut out, taking into consideration the labor involved in notch formation work and the like. Further, the size of the notch shall be determined depending on the height at which the precast panel A is installed and the amount of air leakage at that height. One embodiment is shown in FIG. 1 of the drawings.

The joint part of the precast panel A located above is from the center of the panel A in the thickness direction to the outdoor side.
Although it is formed as a convex protrusion, a substantially triangular notch is formed in this protrusion. A plurality of cutouts are formed at equal intervals along the length of the precast panel A.

By forming the notch, an air introduction path 4 that communicates the joint space C with the outside air is formed.

By the way, the basic sealing material 2 is integrally formed with a water return piece 5 that stands up slightly upward at its outdoor end. By providing this water return piece 5, there is no possibility that rainwater accumulated between the joint parts will drip onto the surface of the precast panel A located below.

Further, at least one water film prevention piece 6 is provided on the stepped portion 7 of the basic sealing material 2 so as to protrude in the horizontal direction. If this piece 6 for preventing water film rise is provided, even if the air introduction path 4 is damaged by the influence of gusts of wind,
Even if rainwater enters the room and accumulates in the joint space C, there is no risk of the rainwater leaking into the room because the joint space C is formed with a step. Furthermore, at the indoor end of the basic sealing material 2, there is a rising piece 8 that shields the space between the precast panels A and A.
If it is formed in one piece, there is no risk of water leaking into the room.

Thus, the present invention has the above configuration. The waterproofing device according to this invention has the following effects.

(i) By forming a notch in the precast panel that communicates the joint space with the outside air and using it as an air introduction path, it is possible to instantly bring the outside air and the joint space to the same wind pressure, It is possible to prevent rainwater from entering the room due to wind pressure.

(ii) Incoming rainwater can be blocked by the rising piece of the basic sealing material, and even if rainwater enters the joint space through the air introduction channel due to gusts or turbulence, the joint space will be blocked. is formed with a step that slopes upward toward the indoor side, and a piece to prevent the rise of a water film is provided at the step of the basic sealing material, so there is no risk of rainwater leaking into the room. There will be no.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and the first
2 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a front view showing the basic sealing material. A...Precast panel, C...Joint space, 1...Indoor side sealing material, 2...Basic sealing material, 3...Rising piece, 4...Air introduction path 5...Water return piece, 6... ...Water film rise prevention piece, 7...Step part,
8...Rising piece.

Claims (1)

[Scope of Claims] 1. A sealing material is interposed on the indoor side between the joints of the upper and lower precast panels having joints formed in a phase-opening shape, and water rising upward at the outdoor end is provided. A basic sealing material consisting of a return piece and at least one water film rise prevention piece provided at the stepped part is attached to the joint end face of the lower precast panel, and the rising piece shields the space between the upper and lower precast panels, A waterproofing device characterized in that an air introduction path is formed to communicate the joint space formed by the sealing material and the rising piece with outside air. 2. The waterproofing device according to claim 1, wherein a rising piece is provided at the indoor end of the basic sealing material to shield between the upper and lower precast panels.