JP2021183788A - Water cut-off structure and construction method of dry type exterior material - Google Patents

Abstract

To provide a water cut-off structure and a construction method of a dry type exterior material that improves water cut-off performance.SOLUTION: In a building exterior wall configured by arranging multiple dry type exterior materials 10 in parallel, a water cut-off structure 100 of a joint 12 is formed between adjacent dry type exterior materials 10, and comprises an indeterminate form seal material 18 arranged as a primary water cut-off line at an outside area A of the joint 12 and an indeterminate form seal material 20 arranged as a secondary water cut-off line at an inside area B of the joint 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a waterproof structure and a construction method for a dry exterior material such as an extruded cement board.

Conventionally, dry exterior materials such as extruded cement boards used as outer walls of buildings are known. In an outer wall structure using a dry exterior material, an angle as a base material is fixed to the building frame, and a clip or the like fastened to the back surface of the dry exterior material is locked to the angle to attach it to the frame (for example,). See Patent Document 1). Further, both ends of the dry exterior material are generally provided with uneven fitting portions in the length direction. For example, when used as a vertically stretched exterior material, the uneven fitting portions are fitted to each other. At the same time, they are attached at regular intervals between the upper and lower dry exterior materials. Therefore, joints are formed between the dry exterior materials in both the vertical direction and the horizontal direction. A water stop seal is provided on the joint portion in order to prevent water such as rainwater from entering the indoor side through the joint portion. The waterproof seal is generally composed of a sealing material that is filled on the outdoor side of the joint.

In addition, since the sealing material alone may not have sufficient waterproofing performance, it is common to adopt a secondary waterproofing structure in which a gasket or a draining material is attached to the indoor side of the sealing material.

Utility Model Registration No. 3194278 Gazette

However, in the above-mentioned conventional water stopping method, the water stopping performance depends on the sealing material (amorphous sealing material) which is the primary water stopping line. Strictly speaking, the secondary water stop lines (standard sealing materials) using gaskets and the like are not continuous, and the secondary water stop lines only complement the primary water stop. Therefore, if the primary water stop line is damaged, reliable water stoppage at the secondary water stop line cannot be expected.

On the other hand, the application of dry exterior materials such as extruded cement boards to high-rise buildings and important applications (hospitals, data centers, etc.) is increasing more and more, and improvement of water blocking performance has been required.

The present invention has been made in view of the above, and an object of the present invention is to provide a water-stopping structure and a construction method for a dry exterior material having improved water-stopping performance.

In order to solve the above-mentioned problems and achieve the object, the waterproof structure of the dry exterior material according to the present invention is between adjacent dry exterior materials in the outer wall of the building composed of a plurality of dry exterior materials arranged side by side. An amorphous sealing material provided as a primary waterproof line in the outer region of the joint and an amorphous sealing material provided as a secondary waterproof line in the inner region of the joint. It is characterized by being prepared.

Further, the method for constructing the waterproof structure of the dry exterior material according to the present invention is a method for constructing the waterproof structure of the dry exterior material described above, and is an amorphous seal as a primary waterproof line in the outer region of the joint. It is characterized by having a step of providing a material and a step of providing an amorphous sealing material as a secondary water stop line in the inner region of the joint.

According to the waterproof structure of the dry exterior material according to the present invention, it is a waterproof structure of joints formed between adjacent dry exterior materials on the outer wall of a building composed of a plurality of dry exterior materials arranged side by side. Since it is equipped with an atypical sealing material provided as a primary water stop line in the outer region of the joint and an atypical sealing material provided as a secondary water stop line in the inner region of the joint, it is possible to improve the water stopping performance. It has the effect of being able to do it.

Further, according to the method for constructing the waterproof structure of the dry exterior material according to the present invention, it is a method for constructing the waterproof structure of the dry exterior material described above, and is not used as a primary waterproof line in the outer region of the joint. Since it has a step of providing a fixed-shaped sealing material and a step of providing an amorphous sealing material as a secondary water-stopping line in the inner region of the joint, it has an effect that the water-stopping performance can be improved.

FIG. 1 is a cross-sectional view showing the first embodiment of the waterproof structure and construction method of the dry exterior material according to the present invention. FIG. 2 is a plan sectional view showing the second embodiment of the waterproof structure and the construction method of the dry exterior material according to the present invention. FIG. 3 is a side sectional view showing the third embodiment of the waterproof structure and the construction method of the dry exterior material according to the present invention. FIG. 4 is a side sectional view showing the fourth embodiment of the waterproof structure and the construction method of the dry exterior material according to the present invention. FIG. 5 is a side sectional view showing the fifth embodiment of the waterproof structure and the construction method of the dry exterior material according to the present invention. 6A and 6B are views showing the sixth embodiment of the waterproof structure and the construction method of the dry exterior material according to the present invention, FIG. 6 is a schematic front view, and FIG. 6 is a cross-sectional view taken along the line H1-H1. , (3) are cross-sectional views taken along the line V1-V1. 7A and 7B are views showing the sixth embodiment of the waterproof structure and the construction method of the dry exterior material according to the present invention, (1) is a perspective view of a main part, and (2) is a top view.

Hereinafter, embodiments of the waterproof structure and the construction method of the dry exterior material according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
First, Embodiment 1 of the present invention will be described.
As shown in FIG. 1, in the waterproof structure 100 of the dry exterior material according to the first embodiment, in the building outer wall formed by arranging a plurality of dry exterior materials 10 side by side, between adjacent dry exterior materials 10. It is a waterproof structure of the joint 12 to be formed. The dry exterior material 10 is made of a rectangular extruded cement plate. This extruded cement plate has a hollow portion 14 and an uneven fitting portion 16 provided at an end portion. The convex portion of the fitting portion 16 of one of the adjacent dry exterior materials 10 is fitted into the concave portion of the fitting portion 16 of the other dry exterior material 10. The joints 12 are formed in a maze between the fitting portions 16. The convex portion and the concave portion of the fitting portion 16 are fitted via a backup material 17 such as urethane. Note that FIG. 1 is a cross-sectional view seen from above in the case of a vertically stretched exterior material, and is a cross-sectional view seen from the side in the case of a horizontally stretched exterior material. In the case of horizontal laying, the extruded cement plate is arranged so that the convex portion is on the lower side and the concave portion is on the upper side in the normal actual form, but in the present invention, the extruded cement plate is arranged upside down from the normal actual form. There is.

An amorphous sealing material 18 is filled and arranged as a primary water stop line on the outdoor side A (outer region) of the joint 12. Further, an amorphous sealing material 20 is filled and arranged as a secondary water stop line on the indoor side B (inner region) of the joint 12. The amorphous sealing material 20 is arranged adjacent to the backup material 17 in an L shape in a cross-sectional view. The amorphous sealing materials 18 and 20 can be made of an amorphous sealing material such as a sealing material which is in the form of a sticky paste at the time of construction and is hardened to become rubber-like after being filled in the joints. By ensuring the continuity of the secondary water stop line with the amorphous sealing material 20 and improving the airtightness, it is possible to suppress air leakage due to the differential pressure between the inside and outside of the room and improve the water stop performance of the joint 12. Therefore, it is possible to improve the water stopping performance when the amorphous sealing material 18 which is the primary water stopping line is damaged. This embodiment is suitable as a waterproof structure for the outer wall of a building where high watertightness is required.

When constructing the above-mentioned waterproof structure 100, first, a clip (not shown) fastened to the back surface of one of two adjacent dry exterior materials with respect to an angle (base material) fixed to the building frame. By locking the (attachment), one dry exterior material 10 is attached to the skeleton. Subsequently, the amorphous sealing material 20 which is a secondary water blocking line is applied to the portion to be the joint 12. Next, another dry exterior material 10 is arranged next to the fitting portion 16 of the attached dry exterior material 10, and the amorphous sealing material 20 is sandwiched between the fitting portions 16 and attached to the skeleton. .. In this way, the joint 12 is formed. After that, the joint 12 is filled with the amorphous sealing material 18 which is a primary water stop line. In this way, the above-mentioned waterproof structure 100 can be constructed.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described.
As shown in FIG. 2, the waterproof structure 200 of the dry exterior material according to the second embodiment has a clip 22 (for example, a Z clip) portion fastened to the back surface of the dry exterior material 10 in the first embodiment. It has improved water stopping performance. The waterproof structure 200 includes a bolt 24 that is inserted through a hole that penetrates from the clip 22 toward the hollow portion 14 of the dry exterior material 10, and a flat that is arranged on the indoor side B of the hollow portion 14 while passing the bolt 24. The nut 26, the packing material 28 for water stoppage that is closely arranged between the indoor side B surface of the hollow portion 14 and the indoor side B of the flat nut 26 while passing the bolt 24, and provided between the bolt 24 and the hole. The amorphous sealing material 30 is provided. According to this, since the gap between the holes around the bolt 24 is closed by the amorphous sealing material 30, no water path is formed. Therefore, the water blocking performance of the dry exterior material 10 can be improved.

When constructing the water-stopping structure 200, first, when the clip 22 is temporarily fixed to the back surface of the dry exterior material 10, the amorphous sealing material 30 is applied to the threaded portion of the bolt 24. After that, the bolt 24 is inserted and fastened in the order of the clip 22, the dry exterior material 10, the packing material 28, and the flat nut 26. In this way, the above-mentioned waterproof structure 200 can be constructed.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described.
As shown in FIG. 3, the water-stopping structure 300 of the dry exterior material according to the third embodiment is the water-stopping structure at the lowermost part of the vertically stretched feet in the above-described first and second embodiments. The clip 22 attached to the indoor side B at the bottom of the dry exterior material 10 is locked and attached to an angle 36 (through) made of L-shaped steel material connected to an angle 33 (piece) attached to the building frame 32. Has been done. The angle 36 is fixed to the angle 33 via the angle 34 (piece). A similar clip 22 is also provided on the upper part of the dry exterior material 10, and is fixed to an angle 33 or the like attached to the skeleton 32. Therefore, the dry exterior material 10 is attached to the skeleton 32 at the top and bottom. An amorphous sealing material 43 is filled and arranged between the vertical portion of the angle 36 and the dry exterior material 10. A backup material 17 such as urethane is arranged on the amorphous sealing material 43. An amorphous sealing material 40 is filled and arranged as a primary water blocking line on the outdoor side A of the joint 13 formed between the dry exterior material 10 and the skeleton 32. Further, an amorphous sealing material 42 is filled and arranged as a secondary water stop line on the indoor side B of the joint 13 and below the horizontal portion of the angle 36. A backup material, a fireproof material, or the like may be provided between the amorphous sealing materials 40 and 42 in the joint 13. Further, a draining steel plate may be provided on the angle 36.

According to this configuration, the irregular sealing materials 42 and 43 ensure the continuity of the secondary water stop line and improve the airtightness to suppress air leakage due to the indoor / outdoor differential pressure and the water stop performance of the joint 13. Can be improved. Therefore, it is possible to improve the water stopping performance when the amorphous sealing material 40, which is the primary water stopping line, is damaged.

When constructing the above-mentioned waterproof structure 300, first, the clip 22 attached to the indoor side B of the dry exterior material 10 is sandwiched between the amorphous seal 43 which is filled and arranged in the inner corner of the angle 36. It is locked to the vertical portion, and the lower end of the dry exterior material 10 is placed on the horizontal portion of the angle 36. Subsequently, the irregular sealing material 42, which is a secondary water stop line, is filled in the joint 13 below the horizontal portion of the angle 36. After that, the outdoor side A of the joint 13 is filled with the amorphous sealing material 40 which is the primary water stop line. In this way, the above-mentioned waterproof structure 300 can be constructed.

(Embodiment 4)
Next, Embodiment 4 of the present invention will be described.
As shown in FIG. 4, the water-stopping structure 400 of the dry exterior material according to the fourth embodiment is the water-stopping structure of the horizontal joint portion between the vertically stretched plates in the above-described first and second embodiments. The clip 22 attached to the indoor side B below the dry exterior material 10 is fixed to the skeleton via the angle 35 (through). An angle 44 (piece) for receiving a weight is fixed to the angle 35. Reference numeral 45 is a discard sticker. An amorphous sealing material 40 is filled and arranged as a primary water blocking line on the outdoor side A of the joint 12 formed under the dry exterior material 10. Further, an amorphous sealing material 46 is filled and arranged as a secondary water stop line between the horizontal portion of the angle 44 and the lower end of the dry exterior material 10 on the indoor side B of the joint 12. In this way, the water stopping performance of the joint 12 can be improved.

(Embodiment 5)
Next, Embodiment 5 of the present invention will be described.
As shown in FIG. 5, the water-stopping structure 500 of the dry exterior material according to the fifth embodiment is a modification of the above-described first embodiment, and is a water-stopping structure at a joint formed between different materials. Is. In the example of the figure, the amorphous sealing material 18 and the amorphous sealing material 20 are formed in the joints formed between the square steel pipe 52 and the dry exterior material 10, which are different materials, in the same manner as in the first embodiment. It is provided. That is, the amorphous sealing material 18 is filled and arranged on the outdoor side A of the joint as a primary water blocking line, and the amorphous sealing material 20 is filled and arranged on the indoor side B of the joint as a secondary waterproof line. Even in this way, the same effect as that of the first embodiment can be obtained.

(Embodiment 6)
Next, Embodiment 6 of the present invention will be described.
As shown in FIG. 6 (1), the waterproof structure 600 of the dry exterior material according to the sixth embodiment is a waterproof structure of the joint intersection C in the horizontal direction and the vertical direction in the case of vertical tension. At the joint intersection C, it is important to ensure that the horizontal and vertical water stop lines are continuous in terms of water stop performance.

In the case of vertical tension, as shown in FIGS. 6 (2) and 6 (3), on the outdoor side A, the primary water stop lines (atypical sealing materials 18 and 40) are the shells on the outdoor side A in both the horizontal and vertical directions. It is on the dry exterior material 10) and is continuous at the joint intersection C. On the other hand, on the indoor side B, the horizontal secondary water stop line (atypical seal material 46) passes over the shell of the indoor side B, but the vertical secondary water stop line (atypical seal). Since the material 20) passes through the fitting portion 16, there is a possibility that the material 20) will be discontinuous at the joint intersection C. Therefore, in the present embodiment, as shown in FIG. 7, an amorphous sealing material 54 for connecting a secondary water stop line is provided on the indoor side B of the fitting portions 16 at both ends in the vertical direction of the shell. The amorphous sealing material 54 is closely arranged at the end of the irregular sealing material 20 of the fitting portion 16, and is also arranged along the vertical end surface of the shell and the end surface of the indoor side B. As shown in FIG. 7 (2), the amorphous sealing material 54 is filled in the position when one of the dry exterior materials 10 is fitted to the other. A backup material 17 is arranged inside the amorphous sealing material 54 in the vertical direction. A secondary water stop line in the horizontal direction (atypical sealing material 46) is in close contact with the vertical end face of the amorphous sealing material 54.

By doing so, the secondary water stop lines in the horizontal direction and the vertical direction at the joint intersection C can be surely made continuous. In the case of horizontal tension, the joints 12 in the horizontal direction and the joints in the vertical direction are reversed.

As described above, according to the waterproof structure of the dry exterior material according to the present invention, the joints formed between the adjacent dry exterior materials on the outer wall of the building formed by arranging a plurality of dry exterior materials side by side. It has a water-stopping structure and is provided with an atypical sealing material provided as a primary water-stopping line in the outer region of the joint and an atypical sealing material provided as a secondary water-stopping line in the inner region of the joint. Can be improved.

Further, according to the method for constructing the waterproof structure of the dry exterior material according to the present invention, it is a method for constructing the waterproof structure of the dry exterior material described above, and is not used as a primary waterproof line in the outer region of the joint. Since it has a step of providing a fixed-shaped sealing material and a step of providing an amorphous sealing material as a secondary water-stopping line in the inner region of the joint, it is possible to improve the water-stopping performance.

As described above, the water-stopping structure and construction method of the dry-type exterior material according to the present invention are useful for dry-type exterior materials such as extruded cement boards used as outer walls of buildings, and in particular, the water-stopping performance of joints is improved. Suitable for improving.

10 Dry exterior material 12,13 Joint 14 Hollow part 16 Fitting part 18,20,30,40,42,43,46,54 Amorphous sealing material 22 Clip 24 Bolt 26 Flat nut 28,48,50 Packing material 32 Frame 33, 34, 44 angles (pieces)
35,36 angles (through)
52 Square steel pipe 100-600 Water-stopping structure of dry exterior material A Outdoor side (outer area)
B Indoor side (inner area)

Claims (2)

It is a waterproof structure of joints formed between adjacent dry exterior materials on the outer wall of a building composed of a plurality of dry exterior materials arranged side by side.
A waterproof structure of a dry exterior material provided with an amorphous sealing material provided as a primary waterproof line in the outer region of the joint and an amorphous sealing material provided as a secondary waterproof line in the inner region of the joint. .. A method for constructing a waterproof structure for a dry exterior material according to claim 1.
Stopping of dry exterior material characterized by having a step of providing an amorphous sealing material as a primary waterproof line in the outer region of the joint and a step of providing an amorphous sealing material as a secondary waterproof line in the inner region of the joint. Construction method of water structure.

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