JP6622016B2 - Wood repair method and repair agent used therefor - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a method for repairing wood having vacant spaces inside or outside, such as wood damaged by white ants, and a repair agent (reinforcing agent) used for the method.

  Many wooden buildings are damaged by white ants. White ants often invade wood from the mouth, and white ants that invade from the mouth devour soft portions along the lines. For this reason, it is common for timber damage damage to have a long ant road that is long in the longitudinal direction. As the damage progresses, the surface (outer surface) becomes dents and cracks (white ants). (Yamato termites) dislike light and drying, so if the wood is in an environment where it is exposed to light or dry, the surface may not be damaged.)

  Therefore, repair of wood damaged by white ants is carried out by filling a hollow material or cracks generated on the outer surface with a reinforcing material (agent) as an example. An injection hole communicating with the empty space (ant road) is drilled, and liquid resin is injected from the injection hole and cured. On the other hand, Patent Document 2 discloses injecting a material in which a powder or sawdust having the same quality as wood, an adhesive, and an insecticide are mixed. Moreover, in patent document 2, the reinforcement material is inject | poured in the state which covered the outer surface with the reinforcement board, and a reinforcement board is removed after injection | pouring of a reinforcement material.

JP-A-61-158567 Japanese Patent Laid-Open No. 05-079195

  Now, the resin has high strength when cured. Utilizing these properties, it is also practiced to impregnate wood for reinforcement. In the case of impregnation, since the resin penetrates between the fibers constituting the wood, the wood as a whole has a very high strength.

  On the other hand, when resin is filled in a cavity (ant road) formed by eating white ants, the resin does not impregnate the whole wood, so to speak, there is a state in which hard foreign matter exists inside the wood. Therefore, due to the difference between the elastic modulus inherent to wood and the elastic modulus of resin, the deformation with respect to load such as bending and compression is different between wood and resin, and the reinforcing agent is stretched inside Therefore, there is a possibility that sufficient reinforcement and hardening cannot be obtained. In other words, the bending as wood is hindered by the resin, and there is a possibility that an excessive burden is applied to a portion that has not been damaged.

  In this regard, in Patent Document 2, it is assumed that the main material of the reinforcing material is made of wood powder or sawdust that is the same as wood, so that it is easy to match the mechanical properties of the reinforcing material to the mechanical properties of the wood. Is done. However, if wood powder or sawdust is the main component, the flow of the reinforcing material is poor, and there is a concern that it will be difficult to reach every corner of the cavity. Also, wood powder and sawdust are the favorite of white ants, so if the effectiveness of the insecticide is poor, the wood powder and sawdust filled for reinforcement will be damaged by white ants and the meaning of the reinforcing material will disappear. It can happen.

  The present invention has been made in view of such a current situation, and intends to provide a technology capable of exhibiting high durability and a reinforcing function while maintaining ease and certainty of filling.

The present invention includes a method for repairing wood and a repair agent used therefor . The repair method is as in claim 1
"In the empty space in the inner portion of the timber, in fluid form synthetic resin termiticide and fine non-cellulosic strength reduction material and the repair method of Ru curing the fluid-like repair agent formed by mixing the filled There,
As the fluid synthetic resin, only epoxy is used, and as the non-cellulosic strength reducing material, a glass balloon or fly ash having a particle size of 50 to 100 μm is used, and the blending ratio of the glass balloon or fly ash is volume. The ratio is set to 20-50% "
It is the composition.

The wood repair agent is as claimed in claim 2,
“This is a repair material that fills the empty space inside the wood,
It is made by mixing a liquid synthetic resin with an anti-anticide and a fine non-cellulosic strength reducing material
As the fluid synthetic resin, only epoxy is used, and as the non-cellulosic strength reducing material, a glass balloon or fly ash having a particle size of 50 to 100 μm is used, and the blending ratio of the glass balloon or fly ash is volume. The ratio is set to 20-50% "
It is the composition.

In the present invention, various types of anti-anticides can be used, but in claims 3 and 4 , thiamethoxam or other neonicotinoid drugs are employed. Other neonicotinoid-based anti-anticide components include imiductopride, acetamiprid, clothianidin, dinotefuran and the like. Examples of other chemical anti-ants include pyrethroids such as vermethrin, tralomethrin, bifenthrin, ciphenothrin, and praretrin. such fenobucarb is mentioned as carbamate may use of natural-based.

  In addition, even if it is an intensity | strength decreasing material or an anti-bacterial agent, it is not restricted to mixing a single kind, and it is also possible to mix several types, respectively.

  In the present invention, a non-cellulosic strength-decreasing material is mixed while using a resin as the main material of the repair agent, so that mechanical properties (mechanical strength) such as bending strength and compressive strength of the reinforcing portion are obtained. , Can approach the mechanical properties of the wood itself. Thereby, the integrity of the wood and the repair agent can be improved, and a load on a specific portion of the wood can be prevented (the repair agent is stretched inside the wood). As a result, high durability and reinforcement hardening can be obtained.

In addition, an anti-anticide is added to the repair agent and can exhibit high anti-ant performance, but the strength-reducing material is a non-cellulosic glass balloon or fly ash , so the strength-reducing material is the target of damage to white ants. There is nothing, and high ant protection performance can be maintained. In addition, since the strength reducing material is a collection of fine materials, high fluidity can be maintained. Therefore, filling is easy and can be spread to every corner of the void.

There are various types of resins, but epoxy resins are often used in adhesives and not only have high adhesion, but also cure by chemical reaction to form a crosslinked structure, so they can be left inside wood as well. It cures quickly just by leaving. Therefore, it is excellent in strength degree and reliability.

In addition, since glass balloon or fly ash is used as a strength-reducing material, it not only contributes to weight reduction by preventing an increase in the weight of the repair agent, but is much finer than wood powder and sawdust. By improving the fluidity of the repair agent, it can be distributed even in narrow spaces.

Various materials such as natural materials and synthetic agents can be used as the termite-proofing agent. However, when thiamethoxam and other neonicotinoid-based materials are used as described in claims 3 and 4 , a high ant-proofing effect is exhibited. It is suitable because it is excellent in safety to the human body.

Although the present invention can be widely applied to repair of wooden buildings such as ordinary houses, it can be applied to historical buildings such as temples, shrines, and castles to greatly protect and preserve cultural heritage. It can be said that it can contribute.

It is a figure which shows the construction method of 1st Embodiment, (A) is a partially broken front view, (B) is a figure which shows the processing state of an injection hole. It is a figure which shows the injection | pouring state in 1st Embodiment, (A) is a vertical front view, (B) is a plane sectional view. (A) (B) is a figure which shows another construction method. It is a figure which shows the other construction method.

(1). First embodiment (FIGS. 1 and 2)
Next, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment shown in FIGS. In this embodiment, the timber 1 is a foundation pillar that supports the base 2, and the timber 1 that is the foundation pillar is placed on the cobblestone 3.

  In this example, a vacant space (ant road) 4 eaten by white ants is vacant inside the wood 1 so as to extend in the longitudinal direction. The internal void 4 is not branched toward the surface. In other words, white ants do not affect the surface.

  Therefore, as a repair method, first, the injection hole 5 is drilled at the appropriate height position of the wood 1 by the drill 6. One injection hole 5 may be provided, or two injection holes 5 may be provided on two parallel surfaces, for example. When the target timber has a long length such as a beam material, a base, or a pillar on the floor, it can be said that it is preferable that a plurality of timbers be separated in the longitudinal direction.

  Reinforcing plates 7 are stacked on each surface of the four circumferences of the wood 1, and two parallel reinforcing plates 7 are pressed and fixed by a clamping device 8 such as a scissors vise. Then, the nozzle 9 is connected to one reinforcing plate 7 by screwing or the like, and the repair agent 10 is injected under pressure from the nozzle 9 toward the injection hole 5. The nozzle 9 is connected to the container 12 via a tube (hose) 11, and the repair agent 10 is supplied from the container 12.

  The container 12 has, for example, a cylindrical shape, and can be attached to a manual gun to push out the repair agent 10 by a forward movement of the plunger. It is also possible to pump by a power pump means such as an electric type instead of a manual type. In the case of the manual type, the nozzle 9 can be directly attached to the tip of the container 12 without using the tube 11.

  As schematically shown in FIG. 1C, the repair agent 10 is a mixture of an epoxy resin 10a and a glass balloon 10b as a strength-reducing material and thiamethoxam 10c as an anti-anticide. Yes. As the glass balloon 10b, for example, one having an average particle diameter of about 50 to 100 μm is used. A viscosity modifier (solvent) can be added to the repair agent 10 as necessary.

  The addition amount of the glass balloon 10b differs depending on the type of target wood and the size of the void 4 (ratio of the void 4 to the cross-sectional area of the wood 1). It is also possible to configure with a balloon 10b. In general, it can be said that the mixing ratio of the glass balloon 10b may be 20 to 30% in terms of the volume ratio (inner coating) with respect to the whole. When the ratio of the void 4 to the cross-sectional area of the wood 1 is small, the repairing agent 10 is also easily bent, so that it can be said that the mixing amount of the glass balloon 10b may be small.

  In addition, if the specific gravity of the glass balloon 10b is set to the same level as the specific gravity of the resin, it is possible to maintain the state of being uniformly mixed with the resin for a long time. It is suitable because there is no trouble.

  In the case of the wood 1 (base pillar) of this embodiment, the load only acts as a compressive load in the axial direction. Therefore, it can be said that the amount of glass balloon 10b may be small because the wood 1 only needs to increase resistance to buckling. In the case of the base 2, since only the compressive load acts, it can be said that the addition amount of the glass balloon 10b may be small.

  When the target wood 1 is subjected to a bending load such as a beam material, a girder material, or an edible wood, the amount of glass balloon 10b added so that the cured repair agent 10 bends to the same extent as the wood portion. You can adjust the intensity by adjusting. Therefore, the mixing ratio of the strength-reducing material such as the glass balloon 10b may be different between the wood that is subjected to a bending load such as a beam and the wood that is subjected to a compressive load such as a column. If it is troublesome to deal with on site, a mixture with a mixing ratio corresponding to the bending load may be prepared as a standard product and used for various kinds of wood.

In this embodiment, since the void 4 is not branched to the outer surface of the wood 1, the reinforcing plate 7 plays a role in preventing the wood 1 from being swollen by the injection of the repairing agent 10. If the wood 1 has sufficient strength to withstand the injection pressure of the repair agent 10, the reinforcing plate 7 is not always necessary. In this case, the nozzle 9 can be directly connected to the injection hole 5 by screwing or the like. Good.

  As shown in FIG. 2 (B), when there is a void on the outer surface of the wood 1 for some reason, the same repair agent 10 as that filled in the inner void 4 is filled, or an ant-proof putty Or just fill it. The figure shows a state in which the same repair agent 10 as that filled in the internal space 4 is filled.

  When the repair agent 10 is cured, the reinforcing plate 7 is removed. This completes the work. Although the repair agent 10 exhibits a reinforcing function by curing, mechanical properties such as bending strength and compressive strength can be maintained at the same level as the wood 1 by mixing the glass balloon 10b, so the whole was renewed to the wood before the damage. Can be restored. Therefore, it is possible to prevent the stress from concentrating on a specific portion of the wood part and improve the overall durability and strength.

  Further, since the glass balloon 10b is an inorganic material containing silicon as a main component, there is no damage caused by white ants, and high ant protection performance can be maintained. Furthermore, since the average particle diameter of the glass balloon 10b is as fine as 50 to 100 μm, the fluidity of the repair agent 10 is not impaired, and the glass balloon 10b can be spread to every corner of the space 4.

  The invention of the present application is not only applied when a worker visits a building and repairs the timber without disassembling the building. This includes cases where repairs are made. Since historical buildings are often dismantled and repaired, it can be said that the present invention can also be easily implemented without being restricted by location.

(2). Second to third embodiments (FIG. 3)
The repair agent 10 is injected from the injection hole 5, and the position of the injection hole 5 depends on the position of the void 4, and is necessarily located at a location along the center line on the side surface of the wood 1. Not exclusively. That is, in many cases, the position of the injection hole 5 on one side of the wood 1 is not constant.

  In this regard, in the second embodiment shown in FIG. 3A, a number of nozzle holes 16 are formed in the reinforcing plate 7 so that the nozzles 9 can be attached to any nozzle holes 16 and the nozzles are not used. The hole 16 is closed with a plug 17. Therefore, even if the injection hole 5 is vacant in any part of the side surface of the wood 1, the repair agent 10 can be injected while being reinforced by the reinforcement plate 7 (the reinforcement plate 7 entirely overlaps one side surface of the wood 1. It is not necessary, and one side surface may be somewhat exposed to the outside of the reinforcing plate 7).

  In the third embodiment shown in FIG. 3B, the backing plate 18 to which the nozzle 9 is attached and the other reinforcing plate 7 are used in combination (the nozzle 9 is inserted into the injection hole without using the backing plate 18). It is also possible to connect directly to 5). As can be understood from this embodiment, a plurality of reinforcing plates 7 may be arranged on one side of the wood 1.

(3). Fourth embodiment (FIG. 4)
In FIG. 4, the target wood 1 has voids 4 and 14 on the surface thereof, and the internal voids (ant roads) 4 and the surface voids 4 and 14 communicate with each other. As an example of the repair method in this case, in the fourth embodiment of FIG. 4, without using the reinforcing plate 7, the repair agent 10 is injected from the injection hole 5 into the inner space 4, and the repair agent 10 is used. The internal space 4 leads to the surface cavities 4, 14, and the repair agent 10 overflows from the surface cavities 4, 14.

  If the internal and external cavities 4 and 14 are in communication, the pressure inside the wood 1 is not so great even if the repairing agent 10 is injected into the injection hole 5 under pressure, so the reinforcing plate 7 is not necessarily required. I can say that. The repair agent 10 overflowing from the void 14 on the surface is scraped off with a spatula 19. If there is no problem such as appearance or dripping, the overflowing repair agent 10 may be left as it is.

  Although illustration is omitted, when the inner and outer cavities 4 and 14 communicate with each other, the reinforcing plate 7 is disposed on each side of the wood 1 as in the first embodiment, and the surface vacant space is formed by the reinforcing plate 7. 14 may be closed, and the internal space 4 may be filled with the repairing agent 10 in that state. In this case, the surface recess 14 is filled with the repair agent 10 in the same plane as the side surface of the wood 1.

  The present embodiment can be variously embodied in addition to the above embodiments. For example, when the length of the wood is long, by providing a vacuum suction hole communicating with the internal space at the end away from the injection hole, and filling the repair agent with the space in a negative pressure state, The repair agent can be spread quickly and every corner.

Moreover, the empty space inside or on the surface of the wood is not limited to those caused by white ants. That is, the subject of the present invention is not limited to repairing wood damaged by white ants. Although wood may have a hollow in the core before cutting, the present invention can also be applied to such wood reinforcement. Although there is a crack occurs in the surface by drying, Ru can be applied to repair of such timber.

  The present invention is actually applicable to restoration of wood such as buildings. Therefore, it can be used industrially.

1 Wood to be repaired (square wood)
2 Foundation 4 Internal space (ant road)
5 Injection hole 7 Reinforcement plate 8 Clamping device 9 Nozzle 10 Repair agent 10a Epoxy resin 10b Glass balloon 10c Anti-ants (Thiamethoxam)
11 Tube (hose)
12 Container 14 Empty surface

Claims (4)

The void vacated on the inner portion of the timber, there in a fluid-like synthetic resin termiticide and fine non-cellulosic strength reduction material and the repair method of Ru curing the fluid-like repair agent formed by mixing the filled hand,
As the fluid synthetic resin, only epoxy is used, and as the non-cellulosic strength reducing material, a glass balloon or fly ash having a particle size of 50 to 100 μm is used, and the blending ratio of the glass balloon or fly ash is volume. The ratio is set to 20-50%,
How to repair wood. A repair agent that fills the empty space inside the wood,
It is made by mixing a liquid synthetic resin with an anti-anticide and a fine non-cellulosic strength reducing material
As the fluid synthetic resin, only epoxy is used, and as the non-cellulosic strength reducing material, a glass balloon or fly ash having a particle size of 50 to 100 μm is used, and the blending ratio of the glass balloon or fly ash is volume. The ratio is set to 20-50%,
Wood repair agent. The anti-anticide is thiamethoxam or other neonicotinoid drugs,
The method for repairing wood according to claim 1. The anti-anticide is thiamethoxam or other neonicotinoid drugs,
The wood repair agent according to claim 2.

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