JPS5935687Y2 - Waterproof joint structure for fireproof exterior walls - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the waterproof joint structure of a fireproof outer wall.

Conventionally, as shown in the reference diagram, the horizontal joint part of the fireproof outer wall was constructed by inserting a separate piece of asbestos paper B on the back side of the Z ice-cutting plate A, and pasting the waterproof asphalt felt 2 behind it. It was sealed to the torso edge C.

Although this structure has excellent fire prevention performance, if rainwater is blown onto the horizontal joint part due to strong winds, the rainwater will flow into the gap between the upper exterior wall material 1a and the Z hard ice cutting board A, and into the Z hard ice cutting board. It passes through the gap between the plate A and the lower outer wall material 1b, enters according to the arrow P by capillary action, and penetrates to the back side of these outer wall materials 1.

In order to prevent this, caulking material must be applied over the entire horizontal joint portion, which is not only aesthetically undesirable, but also requires a lot of effort and cost in construction.

The present invention eliminates the above-mentioned drawbacks, provides a joint structure that is easy to construct, has low material costs, and has good waterproof properties in addition to fireproof properties.

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, a Z-shaped drainage plate A is attached to the horizontal joint between the noncombustible upper and lower outer wall materials 1a and 1b, with its horizontal piece A1 interposed between the upper and lower gaps between the upper and lower outer wall materials. Ru.

The lower piece A3 of the draining plate A is suspended on the front side of the lower outer wall material 1b, and the upper piece A2 stands upright on the back side of the upper outer wall material 1a.

A fireproof and waterproof joint tape 3 is interposed between the upper piece A2 and the furring C on the rear side, and an asphalt felt moisture-proof sheet 2 is interposed behind it.

The joint tape 3 has two strips of inorganic noncombustible tape 32 such as asbestos paper with a thickness of about 0.5 mm on the surface of an asphalt-based waterproof tape 31 with an adhesive back side and a thickness of about 1 mm, excluding both widthwise ends and the middle part. It is pasted in a strip across the entire area.

The joint tape 3 is attached along the length of the horizontal joint so that the front side is in contact with the outer wall material.

The intermediate waterproof tape portion of the joint tape 3 is bent and overlapped to form a double layer, and is inserted and held under the lower surface of the horizontal piece A1 of the draining plate.

The waterproof tape 31 comes into contact with the upper piece A2 of the Z ice-cutting plate A when the joint tape 3 is attached to the rear surface of the horizontal joint part of the wall, and has a width greater than or equal to the width in the vertical direction of A2, and It has a width that covers the upper part of the back surface of the lower outer wall material 1b.

Further, the noncombustible tape 32 is formed to have a width equivalent to at least the vertical width of the upper piece A2 of the draining plate A.

In FIG. 1, reference numeral 4 indicates nails for fixing the exterior wall materials la, lb to the rim.

Next, to explain the waterproofing effect, even if water enters the lower back surface of the upper outer wall material 1a along the upper piece A2 of the draining plate A, the waterproof tape 31 is in close contact with the back surface of the outer wall material 1a. cut off.

Furthermore, since the waterproof tape 31 is in close contact with the lower outer wall material 1b, water entry to the rear surface of the lower outer wall material 1b is blocked.

Regarding fireproof performance, non-combustible tape 32 has a fire resistance of approximately 300 degrees.
The organic waterproof tape 31 can withstand up to about 250°C.

By the way, the following results were obtained in a test comparing the joint structure of the present invention with a conventional joint structure.

(However, according to the watertightness test method of JIS A 1414 and the waterproof structure test method of JIS A 1301.

) In this embodiment, the non-combustible tape is omitted from the middle part of the tape 3 which is inserted into the lower part of the horizontal piece A1 of the draining plate A in a bent polymerized state, so the bent polymerized part acts as a filler and prevents water from flowing. Helps improve isolation.

3 and 4 show another embodiment, in which the joint tape 3 is an asphalt-based waterproof tape 31 with back-adhesive properties, and an inorganic noncombustible tape 32 made of asbestos paper or the like is attached to the surface of the asphalt-based waterproof tape 31, except for both ends thereof. As with the previous embodiment, the noncombustible tape 32 has a width equivalent to at least the vertical width of the upper piece A2 of the Z ice-cutting plate A, and the waterproof tape 31 is formed even wider.

The overall thickness of the joint tape 3 to which both of these are attached is approximately 1.5 mm, as in the previous embodiment.

During construction, the joint tape 3 should be arranged such that the approximate center of the joint tape 3 in the width direction (horizontal direction in FIG. 4) coincides with the horizontal joint part, and the surface side of the joint tape 3 is located between the outer wall material 1 and the rim C. and is attached so as to come into contact with the upper piece A2 of the draining plate A.

In this embodiment, the joint tape 3 itself is not bent and polymerized and inserted into the lower surface of the horizontal piece A1 of the draining plate.

Therefore, this embodiment is easier to install than the previous embodiment, and although it is slightly inferior in watertightness, it has excellent fire resistance because the noncombustible tape 32 is connected and pasted in the width direction of the joint tape 3.

The materials for the noncombustible tape and waterproof tape are not limited to the above embodiments, and it goes without saying that other materials may be used.

As described above, the present invention arranges a joint tape along the length of the horizontal joint part of a noncombustible exterior wall material to which a Z-shaped draining plate is attached, and the tape is made of waterproof tape with a noncombustible tape arranged on the surface. As a result, fireproofing and waterproofing properties have been further improved.

Moreover, caulking of the joint part can be omitted during construction, and there is no need to insert a separate piece of asbestos paper to the back of the part, so the labor and material costs required are reduced, and the appearance is improved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is a sectional view in the width direction of the waterproof sheet, Fig. 3 is a longitudinal sectional view showing another embodiment, and Fig. 4 is the same as Fig. 3. It is a cross-sectional view in the width direction of the waterproof sheet in the example shown. 1... Non-combustible exterior wall material, 1a... Upper exterior wall material, 1b... Lower exterior wall material, 2... Asphalt felt, 3... Joint tape, 31・
...Waterproof tape, 32...Nonflammable tape,
A: Drain board, C: Torso.

Claims (3)

[Scope of utility model registration request] (1) A joint tape is arranged along the length of the horizontal joint part of the noncombustible exterior wall material to which the Z-shaped draining board is attached, and the joint tape is a combination of waterproof tape and noncombustible tape,
The waterproof tape is attached with the noncombustible tape side facing outward, and the waterproof tape has a width that covers the back surface of the Z-shaped draining plate, the back surface portion of the upper exterior wall material above it, and the upper back surface of the lower exterior wall material, and the waterproof tape A waterproof joint structure for a fireproof outer wall, characterized in that the joint structure has a width that covers at least the back side of a Z-shaped draining plate. (2) Joint tape is made by pasting a strip of non-combustible tape on the surface of waterproof tape, excluding both ends and the middle part in the width direction.
The waterproof joint structure for a fireproof outer wall according to claim 1, wherein the intermediate portion is bent and superposed to be double and inserted and sandwiched between the opposing surfaces of the lateral joint portions of the upper and lower outer wall materials. (3) The joint tape is made of a waterproof tape with non-combustible tape affixed to the surface of the waterproof tape except for both ends in the width direction, and the joint tape is attached flatly across the back surfaces of the draining board and the upper and lower exterior wall materials. Scope of claims for utility model registration characterized by (
Waterproof joint structure of fireproof outer wall as described in 1).