JP5156541B2 - Ventilation wall structure and ventilation wall construction method - Google Patents

Description

  The present invention relates to a ventilation wall structure and a ventilation wall construction method, and more particularly, to an improvement in a ventilation wall structure and a ventilation wall construction method suitable for use on an outer wall in a wooden building.

  In recent years, with the improvement or promotion of airtightness or thermal insulation in buildings, it is particularly important to prevent the formation of condensation in the outer walls of wooden buildings, so that the outer walls are breathable, that is, within the outer walls. There are various proposals for a ventilation wall that can release moisture that causes condensation to the outside of the outer wall.

  Among them, for example, Patent Document 1 has a proposal to form a ventilation path that has a ventilation member in the vertical direction in the outer wall and discharges the moisture to the outside of the outer wall by an internal hole of the ventilation member. It is disclosed.

  Incidentally, in the above-mentioned patent document 1, the ventilation member is disposed not only in the vertical direction in the outer wall but also in the horizontal direction in the outer wall. This ventilation member partially deforms the lath. It is arranged in a space that can be made.

Therefore, in the proposal of this document disclosure, even if the outer periphery of the ventilation member is covered with the mortar that passes through the lath, the ventilation path is secured by the internal holes of the ventilation member. Moisture in the outer wall is released to the outside of the outer wall, and condensation can be prevented from occurring in the outer wall.
JP 2008-95445 A (see abstract, claims, paragraph 0014 in the specification, FIG. 1)

  However, in the proposal of the above-mentioned document disclosure, there is basically no problem in that the moisture in the outer wall is released to the outside of the outer wall through the ventilation passage and the intention to prevent the occurrence of condensation in the outer wall is intended. Although there is no, there is a possibility that it is pointed out that there is a slight defect when considering the actual construction of the outer wall.

  That is, in the above proposal, the ventilation path is formed by the internal holes made of open cells in the ventilation member, but the ventilation member is disposed in a space that appears by deformation in the lath.

  And the ventilation member arranged in the space that appears by deformation in this lath is placed in a so-called fixed state with the mortar that is applied to the lath and passes through this lath, but in order to ensure the fixing of the mortar to the lath, When the pressing of the mortar against the lath is excessive, there is a concern that even if the deformed portion of the lath is not crushed, the ventilation member is crushed and the air passage having the necessary cross-sectional area cannot be secured.

  That is, in the ventilation member, effective release of moisture cannot be realized unless the internal pores made of open cells are enlarged. However, when the ventilation member is made of urethane foam, for example, the internal pores are enlarged. As a result, the mechanical strength of the ventilation member is reduced, and if the mortar to be applied to the lath is pressed against the ventilation member, the ventilation member can be easily crushed and it is not possible to secure a ventilation passage having a necessary cross-sectional area. There is sex.

  The present invention has been developed in view of the above-described circumstances, and the object of the present invention is to secure a ventilation path in the outer wall and to condense by releasing moisture to the outside using the ventilation path. It is an object to provide a ventilation wall structure and a method for constructing a ventilation wall that are optimal for preventing the occurrence of water and expecting improvement in versatility.

  In order to achieve the above-described object, the structure of the ventilation wall structure according to the present invention is basically extended to a housing that defines an indoor side and an outdoor side of a building, and an outdoor side surface of the housing. In a ventilation wall structure comprising a waterproof paper, a lath connected to the casing via the waterproof paper, and a mortar to be applied to the outdoor side surface of the lath, the lath is applied to the mortar. A main body portion facing the waterproof paper with a gap between the waterproof paper and allowing the attachment, and a body formed integrally with the main body portion so that the tip is in contact with the waterproof paper. It is assumed that a ventilation path is formed between the waterproof paper and the mortar that is connected to the outdoor side surface of the main body portion of the lath.

  And the structure of the construction method of the ventilating wall according to the present invention is basically constructed by installing waterproof paper on the outdoor side surface of the frame defining the indoor side and the outdoor side of the building, and through this waterproof paper In the construction method of the ventilation wall formed by connecting a lath to the above-mentioned casing and applying mortar to the outdoor side surface of this lath, the above-mentioned lath has the above-mentioned lath eye that allows the above-mentioned mortar to be applied. While having a main body portion facing the paper with a gap, and a convex portion formed integrally with the main body portion and connected to the casing while the tip is in contact with the waterproof paper, The mortar is applied to the outdoor side surface of the main body of the lath, and an air passage is formed between the mortar and the waterproof paper.

  Therefore, in the vent wall structure of the present invention, the lath connected to the casing of the building via the waterproof paper is opposed to the waterproof paper with a gap, and the main body is integrated with the main body. And having a convex portion connected to the housing while the tip is in contact with the waterproof paper, considering the shape of the convex portion of the lath or the shape of the covering member, An air passage can be formed between the mortar applied to the side surface and the waterproof paper, and moisture can be released to the outside through the air passage to prevent the occurrence of condensation.

  Further, according to the construction method of the ventilation wall of the present invention, the lath connected to the housing in the building via the waterproof paper is opposed to the waterproof paper with a gap, and the main body is integrated with the main body. And a convex portion that makes the tip abut against the waterproof paper while the tip of the convex portion of the lath is in contact with the waterproof paper. By connecting and applying mortar on the indoor side of the lath, an air passage appears between the mortar and the waterproof paper, so the shape of the convex part of the lath or the shape of the covering member can be taken into account. In addition, it is possible to construct a ventilation wall that releases internal moisture to the outside through the above-described ventilation path and prevents the occurrence of condensation.

  Hereinafter, the present invention will be described on the basis of the illustrated embodiment, and a description of the construction method of the vent wall according to the present invention will be given while describing the vent wall structure according to the present invention.

  1 to 4 show a cross section of an outer wall in a wooden building, that is, a ventilation wall. In each figure, the right side is the indoor side of the building, and the left side is the building house. Outside.

  By the way, as shown in FIG. 1, the ventilation wall according to the present invention includes a housing 1 that defines an indoor side and an outdoor side of a building, a waterproof paper 2 that is spread on the outdoor side surface of the housing 1, and The lath 3 is connected to the housing 1 through the waterproof paper 2, and the mortar 4 is applied to the outdoor side surface of the lath 3.

  As described above, the present invention is embodied on the outer wall of a wooden building. From this point of view, the casing 1 is basically made of a wooden material, and will be described later. Although it is possible to connect the lath 3 and the covering member 5 in the present invention, it is not essential that the casing 1 is made of a wood system from the intention of the present invention.

  That is, as shown by a virtual diagram in FIG. 1, a wooden board 11 is integrally connected to the outdoor side surface of the housing 1, and the board 11 can connect the waterproof paper 2, the lath 3, and the covering member 5. In this case, the frame 1 may be made of concrete or iron instead of wood.

  It should be noted that the frame 1 mentioned here is not often used as a structural member such as a pillar or a beam in a wooden building, and it is sufficient if it is provided in advance for the purpose of shielding indoors and outdoors. However, from the viewpoint of realizing the vent wall structure in the present invention, the present invention is not limited to this, and a so-called structural wall may be configured.

  The waterproof paper 2 is sometimes referred to as a waterproof sheet or the like, but prevents water such as rainwater from the outside from penetrating into the housing 1 as long as the predetermined waterproof function can be permanently guaranteed. May be arbitrarily configured, and in many cases, is composed of paper containing an oil component such as asphalt.

  The waterproof paper 2 is spread or connected to the casing 1 by hitting fasteners such as tucker and staples on the casing 1, but is also connected to the lath 3 and the covering member 5, which will be described later. 1 may be connected.

  In particular, when the construction method of the ventilation wall according to the present invention is embodied, the waterproof paper 2 and the lath 3, the prevention paper 2 and the covering member 5, or the covering member 5 and the lath 3, The waterproof paper 2, the lath 3, and the covering member 5 may be connected together in advance as a base material, and the base material connected together may be connected to the housing 1.

  That is, for example, when the so-called base material is formed by the waterproof paper 2, the lath 3 and the covering member 5 and the base material has a gap to be a ventilation path S to be described later, according to the present invention. It is advantageous in that the labor required for the construction of the ventilation wall is greatly reduced, efficient construction can be practiced, the construction period can be shortened and the construction cost can be reduced.

  The lath 3 is sometimes referred to as a lath net, and is generally made of metal, that is, a metal lath. In particular, as will be described later, an air passage S is provided between the lath 3 and the waterproof paper 2 described above. Appearing and releasing moisture through the air passage S to prevent condensation in the so-called wall, it is preferable that the rust prevention treatment is performed.

  As the type of lath 3, for example, any of flat lath, hump lath, wave lath and rib lath defined in JIS A 5505 is preferably used. It is 600 mm × 1800 mm, and is used as it is at the time of construction or after being cut into an appropriate size.

  Further, the shape of the lath eye in the lath 3 is not particularly limited, but in many cases, the shape of the mortar 4 such as a turtle shell shape or a rhombus shape can be easily realized.

  Further, the lath 3 is connected to the housing 1 in the same manner as the case where the waterproof paper 2 is connected to the housing 1 by hitting the fasteners such as tucker and staples on the outdoor side surface of the housing 1. The

  The mortar 4 is a mixture of sand, cement and water, and is basically made of a so-called paste before solidification. However, an admixture or the like may be mixed to change the characteristics. As the admixture, any existing one may be selected.

  The mortar 4 is applied to the outdoor side surface of the lath 3 so as to be integrated with the lath 3 and solidifies to form a mortar layer to ensure the integrity of the lath 3 and the ventilation. The road S is established and inundation such as rainwater from the outside is prevented.

  In addition, as shown in a virtual diagram in FIG. 2, a waterproof layer 41 such as waterproof mortar or waterproof coating is separately provided on the outdoor side surface of the mortar layer to prevent inundation of rainwater and the like from the outdoors on the mortar layer. It's okay.

  And, in order to prevent inundation of rainwater and the like from the outside to the mortar layer, the fact that the prevention of cracks in this mortar layer is effective is shown by the experience side, so it is also shown by a virtual diagram in FIG. Thus, for example, a glass fiber mesh 42 formed in a lattice shape for preventing cracks is disposed in the mortar layer, that is, when the mortar 4 is applied to the lath 3, the mesh 42 is applied. Is good.

  In addition, as shown in FIG. 2, when the mortar 4 is applied to the outdoor side surface of the lath 3, as will be described in detail later, the main body portion 3a of the lath 3 has a lath to allow passage of the mortar 4. A part of the mortar 4 penetrates through the main body 3a so that the tip contacts the waterproof paper 2.

  By the way, in the vent wall structure of the present invention, the lath 3 has a lath eye that allows the mortar 4 to be applied, and the main body 3a facing the waterproof paper 2 with a gap. And a convex portion 3b that is integrally formed with the main body 3a and that is connected to the casing 1 while the tip is in contact with the waterproof paper 2.

  That is, in the ventilation wall structure according to the present invention, basically, as shown in FIG. 1, the lath 3 has a lath eye and allows the passage of mortar and the lath eye. Therefore, in the construction of the ventilation wall using the lath 3, the tip of the convex portion 3b is brought into contact with the waterproof paper 2. It is assumed that the mortar 4 is applied to the lath 3 while being connected to the housing 1 in a state.

  As a result, as shown in FIG. 2, a part of the mortar 4 applied to the lath 3 enters the left side in the drawing of the convex portion 3b, and a part of the mortar 4 passes through the main body portion 3a. Enter the empty space A.

  At this time, a portion where the mortar 4 does not invade into the empty space A, that is, the air passage S appears, because the mortar 4 is not applied to the full eye, but is applied in a moderate manner.

  The air passage S is established by solidifying the mortar 4 after dredging. Therefore, the water in the so-called wall can be released to the outside using the air passage S.

  Incidentally, when the lath 3 is formed to have the convex portion 3b having no lath eye, the mechanical strength is higher than that of the lath 3 having the convex portion 3b having no lath eye. From this point, when the mortar 4 is applied to the lath 3, the lath 3 is not easily deformed, which is advantageous in facilitating the construction of the ventilation wall.

  Further, when the lath 3 has the convex portion 3b to increase the rigidity, the thickness of the base material integrally formed with the lath 3 and the waterproof paper 2 and the covering member 5 is reduced, and is applied after glazing. The thickness of the mortar 4 to be obtained can be reduced, and the heat insulation and fire resistance can be improved without excessively increasing the thickness of the entire outer wall.

  From the above, any method can be adopted for forming the above-described air passage S. For example, as shown in FIG. 3, when the lath 3 is a flat lath, the main body portion 3a is made of the flat lath. While the convex portion 3b is partially deformed to form the convex portion 3b, the convex portion 3b has a lath eye, so there is a measure to attach the covering member 5 so as to close the lath eye in the convex portion 3b. .

  At this time, if the covering member 5 is disposed inside the convex portion 3b, the connecting area of the mortar to the lath 3 is reduced, so that the covering member 5 is on the right side in the drawing of the convex portion 3b as shown in FIG. It should be attached to the outside.

  The lath 3 may be connected to the housing 1 through the waterproof paper 2 with the covering member 5 attached to the outside of the convex portion 3b. However, the covering member 5 is connected to the outer periphery of the convex portion 3b of the lath 3. The lath 3 may be connected to the housing 1 after both are integrally connected in advance in a state of being attached to.

  3, when the mortar 4 is applied to the lath 3, as shown in FIG. 4, the mortar 4 applied to the lath 3 is partially leftward in the figure of the convex portion 3b. While entering inside, a part passes through the main-body part 3a and penetrates into the above-mentioned gap.

  At this time, in the same manner as described above, the mortar 4 is not applied to the full extent, but is applied in a moderate manner, so that a portion where the mortar 4 does not enter the gap, that is, the air passage S appears. .

  In other words, the covering member 5 is a member that causes the air passage S to appear in the gap as in the case of the convex portion 3a that does not have the lath, and this member reduces the area of the gap. The air passage S is formed.

  And when covering the convex part 3b in the lath 3 with this covering member 5, it becomes the same as reinforcing this convex part 3b. Therefore, the force at the time of applying the mortar 4 to the lath 3 becomes large temporarily. However, it is advantageous in that the deformation of the lath 3 can be prevented and the air passage S can be formed without being unnecessarily reduced.

  In addition, although the said ventilation path S is formed in the vertical direction in the illustration, although it is not shown in the drawing, this ventilation path S is also formed in the horizontal direction. Of course, when the air passage S is formed in the so-called vertical and horizontal directions, the air permeability in the outer wall is further enhanced, and the occurrence of internal condensation is more effectively suppressed or It becomes possible to prevent.

  By the way, in the proposal disclosed in the above-mentioned Patent Document 1, the member forming the air passage S referred to in the present invention is an open cell foam called an air-permeable member, that is, an internal hole in the air-permeable member made of urethane foam. Is going to be formed.

  And this ventilation member is surrounded by mortar in consideration of the actual construction of this type of ventilation wall, and therefore depends on the state of the internal holes of this ventilation member.

  As described above, when the air holes are made large by increasing the internal holes to improve the air permeability, the mechanical strength of the air holes is likely to be lowered. If the mechanical strength of the ventilation member is ensured by reducing the size, the ventilation member has a problem that sufficient ventilation cannot be ensured.

  Based on the above, the proposal disclosed in the above-mentioned literature has a problem because the ventilation member is used. However, in the present invention, the projection does not use the ventilation member but has a lath eye in the lath 3. 3b or the covering member 5 attached to the convex part 3b having a lath eye is used to form the air passage S, and the convex part 3b and the covering member 5 have mechanical strength that is not easily deformed. Therefore, the air permeability is guaranteed as designed.

  And even when constructing this ventilation wall, because the ventilation path S is formed using the convex portion 3b and the covering member 5 having mechanical strength that is not easily deformed, instead of using the ventilation member, The predetermined air permeability can be ensured as designed.

  As a result, according to the present invention, the ventilation path S can be secured in the outer wall, and the generation of condensation can be prevented by releasing moisture to the outside using the ventilation path S. It is most suitable for expecting improvement of versatility.

  In the above description, the convex portion 3b in the lath 3 has been described as being actively formed in the main body portion 3a. However, in embodying the present invention, a convex portion such as a rib that the lath 3 has in advance is used. In this case, when the convex portion has a lath and allows the passage of the mortar 4, it is sufficient to use the covering member 5 together.

  In the above description, the protrusions 3b of the lath 3 are formed in the form of scattered dots. However, as long as the predetermined air passage S is formed, although not shown, the protrusions 3b are arranged in the vertical direction and the horizontal direction. The ribs may be formed continuously or intermittently in the form of extended ribs, and when they are formed in the form of dots, they may be formed in the form of regular or irregular dots.

It is a cross-sectional view which shows the structure of the ventilation wall structure by one Embodiment of this invention. It is a cross-sectional view which shows the completion state of the ventilation wall shown in FIG. It is a figure which shows the structure of the ventilation wall structure by other embodiment by this invention similarly to FIG. It is a figure which shows the completion state of the ventilation wall shown in FIG. 3 similarly to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Waterproof paper 3 Lath 3a Main body part 3b Convex part 4 Mortar 5 Cover member S Air passage

Claims (6)

A housing that defines the indoor side and the outdoor side of the building, a waterproof paper that is laid out on the outdoor side surface of the housing, a lath that is connected to the housing via the waterproof paper, and the outdoor of the lath In the ventilation wall structure having a mortar to be applied to a side surface, the main body portion facing the waterproof paper with a gap while the lath has a lath that allows the mortar to be applied And a convex portion that is integrally formed with the main body and is connected to the housing while the tip is in contact with the waterproof paper, and is applied to the outdoor side surface of the main body in the lath. A ventilation wall structure, wherein a ventilation path is formed between the mortar and the waterproof paper. The convex portion in the lath does not have a lath that allows the mortar to be applied, and prevents the mortar from being applied to the outdoor side surface of the convex portion, or the convex portion in the lath is The ventilation wall structure according to claim 1, wherein a covering member disposed between the waterproof paper and the waterproof paper is provided and the covering member prevents passage of mortar applied to the outdoor side surface of the convex portion. . The ventilation wall structure according to claim 1, wherein the ventilation path is formed in a vertical direction and / or a horizontal direction in a gap between the main body portion and the waterproof paper in the lath. Install waterproof paper on the outdoor side of the enclosure that defines the indoor side and the outdoor side of the building, connect the lath to the above case through this waterproof paper, and apply mortar to the outdoor side of the lath In the construction method of the ventilation wall, the above-mentioned lath has a lath that allows the application of the mortar, and a main body that opposes the waterproof paper with a gap, and is integrated with the main body. While formed and having a convex portion connected to the housing while the tip is in contact with the waterproof paper, the mortar is applied to the outdoor side surface of the main body in the lath, A method for constructing a ventilation wall, wherein a ventilation path is formed between the mortar and the waterproof paper. The convex portion in the lath does not have a lath that allows the mortar to be applied, and prevents the mortar from being applied to the outdoor side surface of the convex portion, or the convex portion in the lath is The ventilation wall according to claim 4, wherein a covering member disposed between the waterproof paper and the waterproof paper is provided and the covering member prevents passage of mortar applied to the outdoor side surface of the convex portion. Construction method. The convex portion and covering member in the above lath are integrally connected in advance, or the waterproof paper and covering member are integrally connected in advance, and the convex portion, the covering member and waterproof paper in the above lath are integrated in advance. The ventilation wall construction method according to claim 5, wherein the ventilation wall is constructed as a base material.

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