JP6895226B2 - Wall panel joint construction method and joint structure - Google Patents

Description

The present invention relates to a construction method and a joint structure for filling joints formed by abutting wall panels against each other.

Conventionally, a technique for filling joints of exterior panels such as lightweight cellular concrete panels has been known (see Patent Document 1). In this type of technique, for example, the joints of the exterior panels are filled with a sealant to improve waterproof performance.
Here, even if the joints of the wall panel are filled with the sealing material, the joints themselves remain as a pattern, so in order to erase the joints, putty or the like is filled over the sealing material to fill the joints, and then the paint finish is applied. Need to be done. However, due to the shrinkage of the sealing material, a dent is formed in the portion covering the joint, and the joint cannot be completely hidden, which may spoil the aesthetic appearance, especially when a large wall-like finishing treatment is applied.
Therefore, a technique for making joints as inconspicuous as possible has been developed (see Patent Document 2). This is a method in which a joint filling material is filled in a recess after the sealing material is applied and then cured for a predetermined period to complete the shrinkage of the sealing material, and then a finishing material is applied. Further, an insulating material for preventing the adhesion between the sealing material and the wall panel is arranged between the sealing material and the wall panel, or an insulating material for preventing the adhesion between the joint filling material and the sealing material is provided. By arranging the material between the joint filling material and the sealing material, shrinkage of the sealing material does not appear on the surface.

Japanese Unexamined Patent Publication No. 2001-49830 Japanese Unexamined Patent Publication No. 2014-145189

However, even with these methods, there is a problem that the joints cannot be completely made inconspicuous, especially when a nearly flat finish such as a plaster tone in which the joints are conspicuous is applied. In addition, there is a problem that the process takes time for the period until the shrinkage of the sealing material is settled. Further, there is a problem that the volatile matter of the sealing material may accumulate inside the finishing material and cause swelling of the finishing material.
The present invention has been devised in view of such conventional circumstances, and is a wall panel joint construction method capable of making joints inconspicuous, shortening the construction period, and solving the problem of swelling of finishing materials. The purpose is to provide a joint structure.

As a result of diligent studies, the present inventors have come up with the idea that the occurrence of dents on the painted surface due to shrinkage of the sealing material can be suppressed by not using the sealing material, and have completed the present invention. That is, the present invention is as follows.
[ 1 ]
A wall joint construction method in which a plurality of wall panels are arranged vertically and horizontally and the maximum displacement between adjacent wall panels is 5 mm or less at the time of a large earthquake.
(1) A moisture permeable material is placed on the bottom surface of the recess provided along the joint formed by the wall panels being abutted against each other.
(2) The joint filling material is filled in the recess in which the moisture permeable material is arranged, and the joint filling material is filled.
(3) Applying a finishing material to the surface of the joint filling material.
A joint construction method characterized in that the air permeability of the moisture permeable material is 50 cc / cm ^{2 / sec or more in Frazier air permeability.}
[ 2 ]
The joint method according to [1 ], wherein the depth of the recess is 0.5 to 5 mm.
[ 3 ]
The joint construction method according to [1] or [2] , wherein the wall panel is an ALC panel.
[ 4 ]
The joint method according to any one of [1] to [3 ], wherein the moisture permeable material is a moisture permeable tape in which an adhesive material is applied to at least one surface of a breathable base material.
[ 5 ]
The joint construction method according to any one of [1] to [4 ], wherein the joint filling material is a urethane resin-based or acrylic resin-based elastic putty material.
[ 6 ]
The joint construction method according to any one of [1] to [5 ], wherein the joint filling material has a volume shrinkage of 5% or less before and after a predetermined curing period.
[ 7 ]
The joint construction method according to any one of [1] to [6 ], wherein the joint filling material is filled again after the joint filling material is cured.
[ 8 ]
The joint method according to any one of [1] to [7 ], wherein the finishing material is an elastic paint or a slightly elastic paint.
[ 9 ]
In a joint structure in which a plurality of wall panels are arranged vertically and horizontally and the maximum displacement between adjacent wall panels is 5 mm or less at the time of a large earthquake, the wall panels are butted against each other. A recess provided along the joint formed by butt, a moisture permeable material arranged on the bottom surface of the recess, a joint filling material arranged on the moisture permeable material, and a finishing material covering the joint filling material. , Has,
The joint structure is characterized in that the air permeability of the moisture permeable material is 50 cc / cm ^{2 / sec or more in Frazier air permeability.}

In the present invention, since the wall has a maximum displacement of 5 mm or less between adjacent wall panels at the time of a large earthquake, the joint is not broken by an external force such as an earthquake even if a sealing material is not used. By not using the sealing material, it is possible to suppress the occurrence of dents on the painted surface due to the shrinkage of the sealing material, and therefore, it is possible to finish the painted surface with a smooth coating in which the joints are inconspicuous. Further, since the sealing material is not used, the curing period of the sealing material and the construction period required for the shrinkage to be settled can be shortened.

It is a perspective view which shows the wall panel structure partially broken. It is an enlarged cross-sectional view of the recess formed along the joint where the wall panels are butted against each other. It is an enlarged cross-sectional view of the concave part which shows the state in which the moisture permeable material is arranged. It is an enlarged cross-sectional view of the recess which shows the state which the joint filling material is filled on the moisture permeable material. It is an enlarged cross-sectional view which shows the concave part in the state which the finishing material is applied to the filling surface of the joint filling material.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present embodiment shows an example of a joint construction method and a joint structure of a wall panel, and the present invention is not limited to this, and may be modified or applied to other things.
The wall panel structure (FIG. 1) according to the present embodiment must be a wall in which the maximum displacement between adjacent wall panels is 5 mm or less at the time of a large earthquake.
As shown in FIG. 1, in the wall panel structure 5 (wall) according to the present embodiment, a structural plywood 2 is attached to a pillar or a stud (hereinafter collectively referred to as “pillar”) W1 and the outside thereof. A heat insulating material panel 3 for external heat insulation (for example, "Neomafoam" manufactured by Asahi Kasei Construction Materials Co., Ltd.) is attached to the outside, and a wooden or resin furring strip 4 is attached to the outside, and a plurality of furring strips 4 are attached to the outermost side. It is formed by attaching the wall panel 1 of the above. Further, in the wall panel structure 5, the wall panel 1 including the joint 1a is covered with the finishing material 13, and is subjected to a large wall-like finishing treatment for the purpose of forming a flat surface design for a long period of time. .. The wall panel 1 is a concrete member applicable as an outer wall material, and is, for example, a lightweight cellular concrete panel (ALC panel) such as "Hebel Power Board" (registered trademark). Hereinafter, the ALC panel will be described as an example of the wall panel 1.

The length of the wall panel 1 is about 1800 mm to 2000 mm, and the thickness of the wall panel 1 is about 35 mm to 100 mm. The width in the direction orthogonal to the length of the wall panel 1 is about 500 to 700 mm. The wall panel 1 may be cut and used, and for example, the length or width may be cut to about 100 mm.

A notch 1b is formed along the periphery on at least one surface of the wall panel 1, specifically, the outdoor surface (the surface opposite to the side attached to the stud) when used as an outer wall material. ing. When the edge surfaces of the two wall panels 1 are abutted against each other, a joint 1a is formed by the abutting, and a recess 10 is formed by the notches 1b facing each other with the joint 1a in between (see FIG. 2). As shown in FIG. 2, the shape of the recess 10 when viewed in cross section is a rectangle with one side open, the depth is about 1 mm to 3 mm, and the width of the bottom surface 10a is about 8 mm to 25 mm. As will be described later, since the joint method of the present invention does not use a sealing material, the depth of the joint can be made shallower than when the sealing material is used. The depth is preferably 0.5 to 5 mm, more preferably 1 to 3 mm. The width of the joint is preferably 8 to 25 mm.

The joint method of the present invention is a wall joint method in which a plurality of wall panels are arranged vertically and horizontally and the displacement at the time of an earthquake is 5 mm or less.
(1) The moisture permeable material 11 is arranged on the bottom surface of the recess 10 provided along the joint 1a formed by abutting the wall panels with each other.
(2) The joint filling material 12 is filled in the recess 10 in which the moisture permeable material 11 is arranged.
(3) The finish material 13 is applied to the surface of the joint filling material 12.
In the joint method for wall panels of the present invention, the maximum displacement between adjacent wall panels during a large earthquake is 5 mm or less. Therefore, even if a sealing material is not used, the joints may be cut by an external force such as an earthquake. Absent. Since sealing is not used in the present invention, it is possible to suppress the occurrence of dents on the painted surface due to shrinkage of the sealing material, and therefore, it is possible to finish a smooth painted surface in which the joints are inconspicuous.
Hereinafter, each step will be described in detail.

(1) The moisture permeable material 11 is arranged on the bottom surface of the recess 10 provided along the joint 1a formed by abutting the wall panels with each other (moisture permeable material arrangement step).
First, as shown in FIG. 3, after attaching a plurality of wall panels to predetermined positions of the pillars, the moisture permeable material 11 is arranged on the bottom surface of the recess 10 provided along the joint 1a.
The following effects can be obtained by arranging the moisture permeable material. First, it is possible to prevent the joint filling material from entering the depth of the joint gap (the depth of the joint). Next, the volatile components contained in the finishing material and joint filling material, or the water vapor caused by the moisture that has entered from the outside through the finishing material, accumulates between the finishing material and the joint filling material after the finishing material has solidified, and the finishing material swells. Can be prevented from occurring. Furthermore, since the adhesive force of the moisture permeable material to the wall material is weak, it also plays a role of preventing the adhesion between the joint filling material and the wall material, and when the joint is sheared due to an earthquake or the like, the moisture permeable material and the wall material By peeling between the joints, it is possible to prevent stress from concentrating on a part of the joints and prevent cracks from being generated in the joints. That is, if the moisture permeable material and the wall material are firmly adhered to each other, when the joint is sheared, for example, stress is concentrated at the interface between the wall material and the joint filling material, and a crack is generated in that portion. On the other hand, when the moisture permeable material and the wall material are separated from each other, the entire width of the moisture permeable material is sheared, so that the stress is dispersed and cracks can be prevented from being partially generated. In addition, even the joint filling material shrinks slightly, but the weak adhesive force of the moisture permeable material to the wall material absorbs the shrinkage of the joint filling material by peeling between the moisture permeable material and the wall material. This makes it possible to greatly reduce the dents caused by the shrinkage of the joint filling material that appears on the finished surface side, making the joints very inconspicuous.

As the moisture permeable material 11 used in the present invention, cloth, non-woven fabric, paper, moisture permeable tape and the like can be used, but the method using the moisture permeable tape is preferable because of its good workability.
The moisture permeable tape has a structure in which an adhesive material is applied to one side or both sides of a breathable base material such as a non-woven fabric. The breathable substrate is preferably a PP non-woven fabric or a PET non-woven fabric.
The basis weight of the breathable base material ^{is preferably 5 g / m 2} or more and 350 g / m ² or less, and more preferably 15 g / m ² or more and 100 g / m ² or less. The amount of the adhesive material is preferably 4 g / m ² or more and 150 g / m ² or less, and more preferably 10 g / m ² or more and 50 g / m ² or less. The thickness is preferably 0.1 to 1.0 mm. The air permeability of the moisture permeable material 11 ^{is preferably 50 cc / cm 2} / sec or more in terms of Frazier air permeability.

The adhesive force of the moisture permeable material 11 to the wall material is preferably weak enough not to come off during construction, and is preferably 0.1 to 3.0 N / 10 mm or less. If the adhesive force exceeds 5N / 10mm, stress will be concentrated on a part of the joint because the moisture permeable material 11 and the wall material will not peel off when the joint is sheared due to an earthquake or the like. It may cause cracks, and the peeling between the moisture permeable material and the wall material may reduce the effect of absorbing the shrinkage of the joint filling material and making the joint very inconspicuous. There is sex. The width of the moisture permeable material can be constructed as long as it is less than the width of the bottom surface of the joint recess, but in order to disperse the stress as much as possible when the joint is sheared and to absorb the shrinkage of the joint filling material as much as possible, the bottom surface It is preferably approximately equal to the width.
An adhesive may be used for arranging the moisture permeable material, or a mechanical fixing method may be used. At this time, if a moisture permeable tape is used as the moisture permeable material, it can be arranged between the moisture permeable material and the bottom surface of the recess without using an adhesive or the like, so that workability is improved. As the moisture permeable material, for example, the moisture permeable tape "Nitothru AP0300" (PET non-woven fabric, non-woven fabric with grain 25 g / m ² , adhesive material on one side, adhesive amount 30 g / m ² , thickness) manufactured by Nitto Lifetech Co., Ltd. 0.15 mm, Frazier air permeability 170 cc / cm ² / sec, adhesive strength to ALC at 23 ° C 0.75 N / 10 mm) and "Nitothrough AP0203" (PP non-woven fabric, non-woven fabric with grain 70 g / m ² , sticky to one side A material, an adhesive amount of 20 g / m ² , a thickness of 0.50 mm, a non-woven fabric air permeability of 170 cc / cm 2 / sec) and the like can be used.

(2) The joint filling material 12 is filled in the recess 10 in which the moisture permeable material 11 is arranged (joint filling material filling step).
Next, as shown in FIG. 4, the joint filling material 12 is filled in the recess 10 in which the moisture permeable material 11 is arranged.
The joint filling material 12 used in the present invention is preferably a putty material. Examples of the putty material include mortar-based, urethane resin-based, and acrylic resin-based, and are not particularly limited. However, a urethane resin-based or acrylic resin-based elastic putty material having excellent elasticity is preferable, and the finishing material 13 A urethane resin-based elastic putty material having excellent coating performance, a small volume shrinkage, and a short curing period is particularly preferable. As the joint filling material, for example, an elastic putty material "Orton Adher 3500" (urethane resin type, volume shrinkage rate 2.2%) manufactured by Auto Chemical Industry Co., Ltd. can be used. By using the putty material, the spoilage of the joint filling material itself becomes smaller, and in the case of the elastic putty material, it is possible to absorb the dimensional change at the interface with the finishing material 13 and make it difficult for the finishing material 13 to be dented. it can.
After filling the joint filling material, carefully press the spatula so that it is smooth with the surface of the wall panel. After that, the joint filling material is cured for about 1 to 2 days. Further, if the method of filling the joint filling material again after curing the joint filling material is adopted, the joints can be further made inconspicuous.

As for the volume shrinkage rate of the joint filling material 12, it is preferable that the shrinkage rate before and after the following curing period is 5% or less.
Curing method for measuring volume shrinkage: 23 ° C. 50% RH 28 days → 70 ° C. 7 days → 23 ° C. 50% RH 28 days As described above, the joint depth is preferably 5 mm or less, of which the moisture permeable material is 0. Since 1 mm or more is preferable, the depth of the joint filling material is preferably 5-0.1 = 4.9 mm or less. Then, as described above, since the volume shrinkage rate of the joint filling material is preferably 5% or less, the shrinkage in the depth direction when the joint filling material is filled in the joint is 4.9 mm × 5% =. It becomes very small, 0.245 mm or less, and the joints become very inconspicuous after applying the finishing material. On the other hand, the sealing material has a volume shrinkage rate of 5 to 10%, which is different from the joint filling material referred to here.
When filling the joint filling material 12, the joints are sufficiently inconspicuous with one filling, but even the joint filling material 12 shrinks slightly, so that the joint filling material 12 hardens and the shrinkage ends. . If the method of refilling the joint filling material 12 after 5 to 3 days is adopted, the joints can be made less noticeable. By adopting this method, even in the case of a finish close to a flat surface such as a plaster-like finish in which the joints are very conspicuous, the joints become more inconspicuous.

(3) The finishing material 13 is applied to the surface of the joint filling material 12 (painting step).
As shown in FIG. 5, the finishing material 13 is applied to the surface of the joint filling material 12, and for example, when the outside air temperature is 23 ° C., it is cured for 24 hours or more to finish.
The finishing material 13 used in the present invention is preferably an elastic paint or a slightly elastic paint, and more preferably an elastic paint. The elastic paint referred to here is a waterproof exterior thin coating material E, a waterproof multi-layer coating material E, a waterproof multi-layer coating material CE, a waterproof multi-layer coating material RE, and a waterproof double coating material defined in JIS A6909 (2003). It is one of the layer coating materials RS, or is a coating material in which the results of the elongation test and the deterioration test at the time of elongation specified in JIS A6909 (2003) satisfy the same criteria as the above-mentioned coating material. The slightly elastic paint is a paint whose elongation test result at 20 ° C. specified in JIS A6909 (2003) is 20% or more and less than 120%. By using the finishing material 13 as an elastic paint or a slightly elastic paint, the effect of preventing cracks from occurring in the joints becomes large when the maximum displacement between adjacent wall panels is 5 mm or less.

The finishing material 13 is preferably composed of an undercoat material + a main material + a topcoat material, an undercoat material + a main material, or only a main material. In addition, regarding the shape of the finished surface, known such as yuzu skin tone, ripple tone, uneven tone, sand wall tone, earthen wall tone, plaster tone, stucco tone, Kyoto wall tone, fiber wall tone, scraping tone, flat tone, etc. Any of the shapes can be used. Of these, even if the finish is close to flat, such as sand wall-like, plaster-like, Kyoto-wall-like, and flat-like, the joint method of the present invention can be used to finish the joint so that the joint is hardly visible. The thickness of the finishing material 13 is preferably 0.5 mm or more and 20 mm or less, and more preferably 1 mm or more and 10 mm or less.
By painting the entire surface of the wall panel 1 with the finishing material 13, the joint 1a can be erased, so that a large wall-like flat design can be realized.

By executing each of the above steps, the joint structure and the wall panel structure 5 (wall) are formed. As shown in FIGS. 1 and 5, the joint structure of the wall panel structure 5 has a recess 10 provided along the joint 1a of the wall panel 1. A moisture permeable material 11 is arranged on the bottom surface 10a of the recess 10, and a joint filling material 12 is arranged on the moisture permeable material 11, and the entire surface of the wall panel 1 including the filling surface on the joint filling material 12 is finished. 13 covers.

In the wall panel joint construction method of the present invention as described above, since the wall has a maximum displacement of 5 mm or less between adjacent wall panels during a large earthquake, the joints are cut even by an external force such as an earthquake without using a sealing material. Never. In addition, the joints are prevented from being cut by applying a finishing material that covers the joint filling material. Furthermore, since the adhesive force of the moisture permeable material to the wall material is weak, it also plays a role of preventing the adhesion between the joint filling material and the wall material, and when the joint is sheared due to an earthquake or the like, the moisture permeable material and the wall material By peeling between the joints, it is possible to prevent stress from concentrating on a part of the joints and prevent cracks from being generated in the joints.
Further, since the sealing material is not used in the present invention, it is possible to suppress the occurrence of dents on the coated surface due to the shrinkage of the sealing material, and it is possible to finish the coated surface with a smooth coating in which the joints are very inconspicuous. Further, by arranging the moisture permeable material in the joint recess, the moisture permeable material and the wall material are separated from each other, and the shrinkage of the joint filling material is absorbed to make the joint very inconspicuous.
In addition, the curing process becomes unnecessary for the period until the shrinkage of the sealing material is settled, and the construction period is shortened. For example, in the first embodiment of Patent Document 2, it is preferable that the shrinkage of the sealing material is settled and the process proceeds to the next step for 3 days or more, but the present invention does not require that period.
Furthermore, by using a moisture permeable material, water vapor due to moisture contained in the finishing material or joint filling material, water vapor due to moisture entering from the outside through the finishing material, or volatile components in the finishing material or putty material can be removed from the finishing material. After the water vapor has hardened, it can be prevented from accumulating between the finishing material and the joint filling material and causing swelling of the finishing material.

Although the embodiments of the present invention have been described above, the present invention is not limited to this, and can be appropriately changed without departing from the spirit of the invention.

By using the construction method according to the present invention, it is possible to suppress the occurrence of dents on the painted surface and finish the painted surface so that the joints are inconspicuous and smooth, and it can be widely used as a joint construction method for wall panels.

1: Wall panel 1a: Joint 1b: Notch 5: Wall panel structure 10: Recess 10a: Bottom surface 11: Moisture permeable material 12: Joint filling material 13: Finishing material

Claims (9)

A wall joint construction method in which a plurality of wall panels are arranged vertically and horizontally and the maximum displacement between adjacent wall panels is 5 mm or less at the time of a large earthquake.
(1) A moisture permeable material is placed on the bottom surface of the recess provided along the joint formed by the wall panels being abutted against each other.
(2) The joint filling material is filled in the recess in which the moisture permeable material is arranged, and the joint filling material is filled.
(3) Applying a finishing material to the surface of the joint filling material.
A joint construction method characterized in that the air permeability of the moisture permeable material is 50 cc / cm ^{2 / sec or more in Frazier air permeability.} The joint construction method according to claim 1 , wherein the depth of the recess is 0.5 to 5 mm. The joint construction method according to claim 1 or 2 , wherein the wall panel is an ALC panel. The joint method according to any one of claims 1 to 3 , wherein the moisture permeable material is a moisture permeable tape in which an adhesive material is applied to at least one surface of a breathable base material. The joint construction method according to any one of claims 1 to 4 , wherein the joint filling material is a urethane resin-based or acrylic resin-based elastic putty material. The joint construction method according to any one of claims 1 to 5 , wherein the volume shrinkage of the joint filling material before and after a predetermined curing period is 5% or less. The joint construction method according to any one of claims 1 to 6 , wherein the joint filling material is filled again after the joint filling material is cured. The joint construction method according to any one of claims 1 to 7 , wherein the finishing material is an elastic paint or a slightly elastic paint. In a joint structure in which a plurality of wall panels are arranged vertically and horizontally and the maximum displacement between adjacent wall panels is 5 mm or less at the time of a large earthquake, the wall panels are butted against each other. A recess provided along the joint formed by butt, a moisture permeable material arranged on the bottom surface of the recess, a joint filling material arranged on the moisture permeable material, and a finishing material covering the joint filling material. , Has,
The joint structure is characterized in that the air permeability of the moisture permeable material is 50 cc / cm ^{2 / sec or more in Frazier air permeability.}

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