JP2004124484A - Termite-proof structure of building, and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide termite-proof structure, a building provided with the structure, and a construction method of the termite-proof structure easily handled with good workability. <P>SOLUTION: The outdoor side of a foundation 20 of the building is covered with a metal pad 10, and side peripheries of a sill 30 and the lower part of a column 35 are covered with the metal pads 10. The metal pad 10 is formed by forming a nickel alloy having corrosion resistance to the secretion of termites, into a three-dimensional irregular mesh structure. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a termite structure for preventing termites from entering a building, a building provided with the termite structure, and a construction method of the termite structure.
[0002]
[Prior art]
Generally, when a building is protected from termites, a termiticide is often applied to the surface such as the foundation of the building. However, chemical methods using termiticides have a limited period during which their effects can be maintained, and are toxic to humans. In recent years, methods using no termiticides have been considered.
[0003]
As a method not using the termiticide, there is a conventional method described in, for example, Patent Document 1 below.
[0004]
In this method, a heat insulating material is provided on the outdoor side of the outer peripheral foundation, and a mesh sheet is provided on the outdoor side surface. This mesh sheet is formed by knitting stainless wires in a lattice shape. The mesh of the mesh sheet has a size that does not allow termites to pass through, so that no termites can enter the inside of the portion where the mesh sheet is provided.
[0005]
[Patent Document 1]
JP-A-2001-81788 [0006]
[Problems to be solved by the invention]
However, in the above prior art, in order to braid a stainless steel wire by a machine, furthermore, to keep a certain interval between the wires and maintain this interval, the outer diameter and the rigidity of the wire are relatively large with respect to the mesh size. It is necessary to use a high wire, and as a result, there is a problem that the rigidity of the mesh sheet is increased, the mesh sheet is heavy, the handling is troublesome, and the workability is not very good.
[0007]
It is an object of the present invention to provide a termite structure that is easy to handle and has good workability, a building provided with the same, and a method for constructing the termite structure, focusing on such conventional problems.
[0008]
[Means for Solving the Problems]
The termite structure for achieving the above object is as follows:
Of the building components, at least a part of the components existing below the predetermined height with respect to the ground level and / or the components existing below the predetermined height, the outdoor side surface is made of metal. Covered with a pad made of
The metal pad is formed by forming a metal having corrosion resistance to the termite secretion into a three-dimensional irregular network structure.
[0009]
Here, it is preferable that the metal pad is formed by firing a foaming resin, attaching a metal to the surface of the foamed resin, and then removing the resin.
[0010]
A building for achieving the above object is provided with the above termite structure.
[0011]
In addition, the construction method of the termite structure to achieve the above object,
Prepare a metal pad made of metal that is resistant to termite secretion in a three-dimensional irregular network structure,
Of the constituent members of the building, at least the outdoor surface of the constituent members existing below the predetermined height and / or the parts existing below the predetermined height with respect to the ground level is made of the metal. Covered with a pad made of
After overlapping the ends of the metal pad, an impact load is applied to the overlapping portions to connect the ends.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a building according to the present invention will be described with reference to the drawings.
[0013]
As shown in FIG. 1, the building according to the present embodiment has a foundation 30 provided on a concrete foundation 20, and a column 25, a brace 37 and the like are provided thereon.
[0014]
In this building, a termite structure is applied to an area up to a height of 1 m with respect to the ground level. Specifically, the metal pad 10 covers the outdoor side of the foundation 20, the outer periphery of the base 30, and the lower outer periphery of the pillar 35 and the brace 37.
[0015]
Here, the specifications of the metal pad 10 of the present embodiment will be described.
[0016]
As shown in FIG. 6, the metal pad 10 is made of a nickel alloy having corrosion resistance to the secretions of the termite 1 in a three-dimensional irregular network structure, in other words, a spongy structure. For this reason, a large number of cells (voids) 12 having irregular shapes and sizes are present inside the metal skeleton 11 forming the spongy structure.
[0017]
The porosity (porosity) of the metal pad 10 is 90 to 98%, the cell density is 40 to 80 cells / inch, and the thickness of the metal pad 10 is 0.5 to 2 mm. The cell density indirectly indicates the average cell size, and the average size is set to be equal to or less than the average value t of the maximum diameter of the head of the termite 1. The porosity here is a value obtained by dividing the actual metal volume by the volume covered by the virtual surface with the metal pad circumscribing the virtual surface.
[0018]
As shown in FIG. 7, in the metal pad having the above-described specification, first, the foam resin is fired in a shape suitable for the outer shape of the metal pad (step 1). At this time, the foaming rate of the resin is determined according to the porosity and cell density determined as the specifications of the metal pad. Next, a conductive treatment is applied to the foamed resin (step 2). In the conductive treatment, the foamed resin is immersed in a carbon slurry, and conductive carbon is attached to the surface of the foamed resin. Here, the surface of the resin includes not only the surface exposed to the outside, but also the surface of the resin skeleton forming the internal cells. Subsequently, electroplating is performed on the resin to which carbon has adhered (step 3). The plating material used in this plating process is a nickel alloy that forms a metal pad. In addition, the plating amount in this plating process is determined according to the porosity and cell density determined as the specifications of the metal pad, similarly to the foaming rate of the resin described above. Next, a heat treatment is applied to the plated foaming resin to incinerate and remove the foaming resin, carbon, and the like (step 4). Removal of the foaming resin, carbon, and the like forms a metal pad having a spongy structure. The voids (cells) in the metal pad are not only the cells that the foamed resin originally had become narrower by the metal plating thickness, but also the cells of the metal pad, and the portions where the foamed resin was present were incinerated and removed. Some of them become cells of metal pads.
[0019]
Further, the metal pad can also be formed through the step shown in FIG. Specifically, similarly to the above method, first, the foaming resin is fired in a shape suitable for the outer shape of the metal pad (step 1). Subsequently, a metal powder slurry is adhered to the surface of the foamed resin (step 3a). This metal powder slurry is obtained by mixing a nickel alloy powder for forming a metal pad into an acrylic resin which cures when moisture disappears. In this treatment, the foamed resin is immersed in the metal powder slurry, and the metal powder slurry is adhered to the surface of the foamed resin. Then, the moisture is removed to cure the acrylic resin as a binder. Next, the foamed resin to which the metal powder is attached is subjected to a heat treatment to remove the foamed resin and the like (step 4).
[0020]
As described above, in the metal pad of the present embodiment, the average size of the cell is equal to or less than the average value of the maximum diameter of the head of the termite, so that the termite cannot escape from one side of the metal pad to the other side. . In addition, the fact that the average cell size is equal to or less than the average value of the maximum diameter of the termite head means that there are cells having a size larger than the maximum diameter of the termite head. Even if termites try to invade from the cell, the metal pad has a three-dimensional irregular network structure, so the metal skeleton that forms the next cell may be present at the exit of the invading cell, so that Without extreme bending of the head, the head cannot be put into the next cell, and eventually cannot pass through this metal pad.
[0021]
By the way, since the mesh sheet of the prior art has a two-dimensional network structure because the stainless steel wire is knitted by a machine as described above, the interval between the wires (metal skeleton) is surely set at all points. Since it is necessary to hold the wire at a fixed interval, it is necessary to use a wire having a relatively large outer diameter and a high rigidity with respect to the mesh size. As a result, the rigidity of the mesh sheet is increased and the mesh sheet is heavy. On the other hand, the metal pad of the present embodiment has a three-dimensional irregular network structure to prevent termite invasion as described above, so that the mutual distance between the metal skeletons is set at all points. Since it does not need to be kept constant and does not need to be knitted by a machine, there is no need to use a metal skeleton having a relatively large outer diameter and a high rigidity with respect to the mesh size as in the prior art mesh sheet. Further, in the present embodiment, the porosity can be easily increased. Therefore, in the present embodiment, the weight per unit area can be reduced, and the flexibility can be higher than that of the mesh sheet. For this reason, handling is easy and workability can be improved.
[0022]
Next, a method of covering the outdoor side of the foundation 20, the outer periphery of the base 30, and the lower outer periphery of the pillar 35 and the brace 37 using the metal pad 10 described above will be described.
[0023]
In recent high-insulation houses, as shown in FIG. 2, a heat insulating material 25 is often applied to the outdoor side surface of the rising portion 21 of the foundation 20. In such a case, first, the entire outdoor side surface 26 of the heat insulating material 25, the upper surface 27 of the heat insulating material 25, and the upper surface 22 of the foundation 20 are covered with the metal pad 10. Next, the metal pad 10 is temporarily fixed to the heat insulating material 25 using a tucker or the like. Finally, mortar is applied to the metal pad 10 covering the outdoor side surface 26 of the heat insulating material 25. In the case where the heat insulating material 25 is not applied to the outdoor side of the foundation 20, the outdoor side surface of the foundation 20 is directly covered with the metal pad 10, and thereafter, mortar is applied to the metal pad 10.
[0024]
As shown in FIG. 3, the metal pad 10 is wound around the base 30 provided on the foundation 20 around the entire side peripheral surface of the square member forming the base 30. At this time, one end of the metal pad 10 is overlapped with the other end, and the overlapped portion is fixed to the square bar 30 with the staple 6 using the above-mentioned tucker. Finally, the overlapping portion is hit with a mallet 5 or the like. When the overlapping portion is hit with a mallet or the like 5 in this manner, a part of the metal skeleton forming one end of the metal pad 10 enters the gap at the other end, and is mutually It becomes entangled and both ends are integrally connected. When the overlapped portion is hit with a mallet 5 or the like, the gap of the hit portion is crushed, so that the thickness is reduced, and there is almost no step between the overlapped portion and the non-overlapping portion. .
[0025]
Note that the ends of the metal pads 10 can be connected to each other by hitting the overlapping portions with a mallet 5 because the metal pads 10 have a three-dimensional irregular mesh structure. In a two-dimensional regular mesh structure like a sheet, it is not possible to connect in a similar manner. This is because, although the metal pad 10 has a three-dimensional irregular network structure, although the metal skeleton has a ring shape to form a complete cell and the metal skeleton has a ring shape, A part of the ring is cut off to form an incomplete cell, and it is as if a hook-and-loop tape of Velcro (registered trademark of Velcro) is used. This is because a metal skeleton forming a complete cell having a small size or an incomplete cell enters a portion forming a complete cell.
[0026]
As described above, in the present embodiment, the connection between the end portions of the metal pads can be extremely easily performed, and also from this viewpoint, the workability can be improved.
[0027]
As shown in FIG. 2, the drainer 39 provided on the heat insulating material 25 is also covered with the metal pad 10 in the same manner as the base 30 described above.
[0028]
The connection between adjacent metal pads is performed in the same manner as described above. Further, when covering the above-described base with a metal pad, and further, when covering a pillar or the like described later with a metal pad, the ends of the metal pads are connected to each other in the same manner as described above.
[0029]
A pillar 35 is provided on the base 30. For this reason, when covering the portion of the base 30 on which the pillar 35 is provided with the metal pad 10, as shown in FIG. 4, a cut 15 is made in the portion where the pillar 35 is located, and a part of the metal pad 10 is 35, and the entire remaining portion of the metal pad 10 is firmly in contact with the outer peripheral surface of the base 30.
[0030]
When the lower part of the pillar 35 is covered with a metal pad, as shown in FIG. 5, the metal pad 10 longer than the distance from the height of 1 m to the lower end of the pillar 35 with respect to the ground level is used. Is prepared, a cut 16 is made in a portion of the metal pad 10 where the base 30 is located, a part of the lower part of the metal pad 10 is brought into contact with the upper surface of the base 30, and another part of the lower part of the metal pad 10 is The side of the base 30 is brought into contact.
[0031]
As described above, at the joint between the members, such as the joint between the base 30 and the column 35, the joint between the base 30 and the brace 37, and the joint between the column 35 and the brace 37, the metal covering one of the members is used. The pad and the metal pad that covers the other member are overlapped, and the joint between the members is covered with a plurality of metal pads without gaps.
[0032]
As described above, in the present embodiment, by covering the foundation 20, the base 30, the pillars 35, and the like with the metal pad 10, it is possible to prevent the termites from entering the inside of these members, and further, the inside of the building by a physical method. Can be prevented.
[0033]
In the present embodiment, the metal skeleton of the metal pad 10 is formed of a nickel alloy. However, another metal may be used as long as it is a metal having corrosion resistance to termite secretions. The surface of the metal skeleton formed of a nickel alloy or the like may be plated with copper or zinc. This is because copper and zinc have a termite repellent effect.
[0034]
【The invention's effect】
According to the present invention, it is not necessary to use a wire having a relatively large outer diameter and a high rigidity with respect to the mesh size as in the conventional mesh sheet, and the porosity can be easily increased. Therefore, the weight per unit area can be reduced, and the flexibility can be increased as compared with the mesh sheet. For this reason, handling is easy and workability can be improved.
[0035]
Further, since the metal pad of the present invention has a three-dimensional irregular network structure, when the metal pads are overlapped with each other and an impact load is applied thereto, a part of the metal skeleton of one of the metal pads is reduced. , It enters the gap of the other metal pad and becomes entangled with each other, and the both ends are connected integrally, so that the mutual connection of the metal pads can be made extremely easily, improving the workability from this viewpoint as well. Can be done.
[Brief description of the drawings]
FIG. 1 is a perspective view of a frame of a building according to an embodiment of the present invention.
FIG. 2 is a sectional view around a foundation of a building in one embodiment according to the present invention.
FIG. 3 is an explanatory view showing a method of attaching a metal pad to a base in one embodiment according to the present invention.
FIG. 4 is an explanatory view showing a method of attaching a metal pad to a base at a joint portion with a pillar in one embodiment according to the present invention.
FIG. 5 is an explanatory view showing a method of attaching a metal pad to a pillar in one embodiment according to the present invention.
FIG. 6 is a cross-sectional view of a main part of a metal pad in one embodiment according to the present invention.
FIG. 7 is a flowchart showing a manufacturing process of a metal pad in one embodiment according to the present invention.
FIG. 8 is a flowchart showing a manufacturing process of a metal pad according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Termite, 5 ... mallet, 10 ... metal pad, 11 ... metal skeleton, 12 ... void, 20 ... foundation, 21 ... rising part, 25 ... heat insulating material, 30 ... base, 35 ... pillar, 37 ... bracing, 39 ... Draining.

Claims (10)

In the termite structure of a building that prevents termites from entering the interior of the building,
Of the components of the building, at least a portion of the component that exists below the predetermined height with respect to the ground level and / or the component that exists below the predetermined height, the surface on the outdoor side, Covered with metal pads,
The metal pad is formed by forming a metal having corrosion resistance to the secretions of the termite into a three-dimensional irregular network structure,
A ant-proof structure for buildings. The termite structure of a building according to claim 1,
The metal pad is formed by firing a foamed resin, attaching a metal to the surface of the foamed resin, and then removing the resin.
A ant-proof structure for buildings. In the termite structure of a building according to any one of claims 1 and 2,
The porosity of the three-dimensional irregular network is 90% or more;
A ant-proof structure for buildings. In the termite structure of a building according to any one of claims 1 to 3,
The surface of the metal forming the three-dimensional irregular network structure is subjected to copper plating or zinc plating,
A ant-proof structure for buildings. In the termite structure of a building according to any one of claims 1 to 4,
The ends of the metal pads are connected to each other by partially penetrating the gap of the mesh structure forming the other end, wherein the mesh structure forming one end portion is connected.
A ant-proof structure for buildings. In the termite structure of a building according to any one of claims 1 to 5,
The component existing below a predetermined height with respect to the ground level is a concrete foundation having a rising portion extending vertically upward from the ground, and an outdoor side of the rising portion of the concrete foundation. Between the lower end and the upper end, and on the upper surface of the rising portion, the metal pad is provided,
Mortar is applied to the metal pad provided on the outdoor side of the rising portion of the concrete foundation,
A ant-proof structure for buildings. In the termite structure of a building according to any one of claims 1 to 5,
The component existing below a predetermined height with respect to the ground level is a square pillar-shaped base material provided on the foundation,
On the outer periphery of the base material on the square pillar, the metal pad is wound so as to cover four side surfaces,
A ant-proof structure for buildings. In the termite structure of a building according to any one of claims 1 to 5,
The part of the component existing below a predetermined height with respect to the ground level is a lower part of a pillar and / or a lower part of a brace,
The metal pad is wound around the lower part of the pillar and / or the outer periphery of the lower part of the brace,
A ant-proof structure for buildings. A building comprising the termite structure of the building according to any one of claims 1 to 8. In the construction method of the termite structure to prevent termites from entering the interior of the building,
Prepare a metal pad formed of a metal that is corrosion resistant to the termite secretions in a three-dimensional irregular network structure,
Among the constituent members of the building, at least the part of the constituent member existing below the predetermined height with respect to the ground level and / or the part existing below the predetermined height, and Covered with metal pads,
After overlapping the ends of the metal pad, an impact load is applied to the overlapping portion to connect the ends,
A method for constructing a termite structure of a building, characterized in that:

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