JP4069259B2 - Repair structure of damaged cavities in trees - Google Patents

Description

  The present invention relates to a repair structure for repairing damaged cavities generated in tree trunks and branches.

  In the early repair of damaged cavities, a method of filling mortar mainly composed of cement after removal of corroded portions in the cavities and antiseptic (sterilization) treatment has been used. However, after that, a technique for filling a cavity with a mixture of a mortar mixed with synthetic resin or fibers or a foamable resin has been seen. In addition, there is also a technique that does not fill a cavity with a repair material but uses a technique for applying (coating) the repair material to the inner wall of the cavity or a technique for closing a cavity opening with the repair material or a plate-like member. is there.

In the literature, after removing corrosion in the damaged cavity of trees and preserving treatment, mortar containing cement as a main component and a curing accelerator and acrylic polymer is used as a repair material to be filled in the cavity or applied to the inner surface of the cavity. (For example, refer to Patent Document 1).
In addition, some repair materials are mixed with an epoxy resin as the main component and foamed polymers, viscous materials, inorganic minerals, etc., and depending on the condition of the damaged cavity, either filling or opening blockage is selected. (For example, refer to Patent Document 2).

  Japanese Patent No. 3208565   JP 9-107819 A

  In the prior art, regardless of the form of repair, repair is performed so that the xylem of the tree and the repair surface are substantially the same surface, and then waiting for the bark to be covered on the repair surface. However, due to the long period until completion, there are many cases where the intended repair result is not obtained depending on the natural power or artificial work (mischief).

In other words, in the repair material that is mainly made of cement and mixed with other materials, voids that are not filled with the repair material tend to be formed in the cavity, and the mortar itself is cracked, peeled off, etc., which allows water to be submerged. Corrosion that cannot be seen from the outside will occur.
In addition, in a repair material in which a foamable resin or other synthetic resin is blended, since the mixing is not uniform, unevenness occurs in curing, and cracking and peeling are likely to occur. This also allows water immersion and corrosion, as described above.

  In the above-mentioned conventional technology, the strength of the repair material and repair structure is also inferior, so even if the trees in parks, shrines, schools, etc. where people gather are repaired, damage due to artificial work (human power such as mischief) occurs. Cheap. Therefore, in the present invention, it is desired to place importance on weather resistance and toughness as well as the sealing property in the cavity of the repair material that is the outside of the repair. Also, consider the appearance (aesthetics) of the trunks after repairs.

  The repair structure of the present invention that solves the above-mentioned problems does not consist of mixing or blending several repair materials, and is a repair structure in which a single repair material is sequentially filled or applied (lining, coating). It shall have That is, all of the damaged cavity of the tree can be filled, and the foamable resin that adheres securely to the inner surface thereof, and the FRP (glass fiber) that is lined (coated) on the shaping surface formed after the foamable resin is solidified (Reinforced plastic) is the main body (core) of the repair structure, and if necessary, a repair structure in which the bark color paint for adjusting the appearance after repair and a hard resin for protecting the FRP are applied. . In carrying out the present invention, it goes without saying that in any form, the removal of the corrosion of the damaged cavity and the antiseptic treatment are performed in advance.

  There are many foamable resins that can be used as the filler, but it is preferable to use a resin that provides a high foaming pressure (foaming ratio) at the time of filling and that does not cause voids (not filled) in the cavity. After the foamable resin is solidified, it is shaped to resemble the bark surface, and FRP is lined (coated) on the shaped surface. Thereby, the foamable resin previously filled is protected.

  In addition, the repair structure of the damaged cavity portion of the tree is composed of a foamable resin filled in the damaged cavity portion and FRP lining the shaping surface after solidification, and the bark of the tree on the lining surface of the FRP It is good also as a structure of apply | coating a color coating material.

Furthermore, as a repair material that forms the repair structure, the foamable resin that fills the damaged cavity and the FRP that is lined on the shaping surface after solidification are applied (overcoated) to the lining surface of the FRP to protect the FRP. It may be configured using a cured resin.
Moreover, it is good also as a thing of the structure which apply | coated (overcoat) the said bark color coating material to the said hard resin application surface further. The paint is preferably a water-based paint with an excellent matting function.

  Furthermore, in the present invention, it is possible to use urethane foam having excellent foamability and adhesion as the aforementioned foamable resin.

  In addition, when there is a spread (the length and diameter of the cavity is large) in damaged cavities such as tree trunks or branches, the required number of reinforcing aggregates such as tough metal or wood are included in the filled urethane foam. It is also possible to make a repair structure. The reinforcing aggregate desirably has irregularities or protrusions on its surface. Thereby, the fall of trees (breakage) etc. at the time of a strong wind or snowfall can be prevented.

  Furthermore, in the present invention, the above-mentioned hard resin can be a gel-like coating resin.

The effect of this invention is demonstrated for every claim.
In claim 1, since the foaming resin is filled in the damaged cavity after the removal of the corroded portion and the antiseptic treatment while being foamed as a single unit without being mixed with other repair materials, unlike the others, the cavity is entered into the cavity. It has the advantages of excellent filling and adhesion, and less generation of cracks and peeling. Accordingly, the effect of preventing water intrusion and corrosion is great. In addition, shaping after filling (after solidification) has an advantage that it can be easily performed with a hand-held blade. This effect becomes more prominent when the foamable resin is urethane foam.

  In addition, FRP lined on the shaping surface of the shaped foamed resin is said to have the highest impact strength in the resin, and the effect of protecting the repaired part from the impact caused by nature or man-made work (mischief by human power, etc.) large. This is an unparalleled great effect by FRP.

  In addition, since the above-mentioned repair structure by foaming resin (foaming urethane) and FRP and the effect are the same also in Claim 2, the description regarding these is abbreviate | omitted below (effect of Claim 2 or less).

  The bark color paint applied to the surface of the FRP in the repair structure shown in claim 2 has good coloration to the FRP, and prevents the weathering of the surface of the FRP during the period until the bark covering is completed and the trunk after the repair. Has the effect of making it look natural without any discomfort. For this effect, a water-based paint having a matte function is effective.

  The hard resin applied to the FRP in the repair structure according to claim 3 becomes hard like a stone when cured, thereby preventing the surface weathering of the FRP until the bark covering is completed and enhancing the repair location. To do. Further, when the cured resin is applied, the surface becomes smooth, and the progress of the bark to be covered becomes smooth.

In addition to the effect of the repair structure shown in claim 3, the repair structure shown in claim 4 can improve the colorability of the paint by the effect of applying a hard resin, and can enhance the appearance (aesthetics) after repair. .
In addition, the repair structure of claim 4 has a damaged tree trunk and the like, and the damage of the tree is weak. It is effective for repairing and forming imitation bark.

  As the foamable resin used in the present invention, when urethane foam is used as described in claim 5, there is an advantage that even a small void in the cavity can be filled due to the high foaming pressure generated by the foaming adjustment, In addition, the adhesive force is higher than others, and there is an advantage that it does not peel off. Therefore, the effect of being waterproof and antiseptic over many years is great.

  Further, the repair structure shown in claim 6 in which the required number of reinforcing aggregates are included in the urethane foam is not limited to repair of the damaged cavity, but also fallen trees and breakage caused by external pressure (weight) such as strong wind and snow. There is an effect to prevent such. In other words, urethane foam is tightly filled up to the small void in the damaged cavity while enclosing the reinforcing aggregate, so it must be strong enough to resist the external pressure (weight) of strong winds and snow. Can do.

  Further, as shown in claim 7, when the hard resin is a gel-like coating resin, it hardens like a stone, so that the effect of preventing weathering of FRP after repair is great. In addition, it is easy to top coat the paint and has the effect of improving the color developability.

  In the present invention, the prior repair technique in which several repair materials are mixed or blended to be filled or applied is not used, and the repair materials are in the form of sequentially filling, lining or applying all as a single material. The trouble that has been seen in the past is freed up.

  The configuration and operation of the repair structure of the present invention will be described below with reference to the drawings. In the present invention, the foamable resin (urethane foam) and FRP, which are the repair materials that are the core of the present invention, appear in all forms of the present invention, so the description is shown in FIG. The description in other forms is omitted. In addition, because of the necessity for explanation, there are places where the dimensions are enlarged depending on the portion of the figure even though there is no large thickness. (For example, bark 4, paint 7 and hard resin 8). Further, in the figure, parts, materials, etc. having the same function are given the same reference numerals.

  FIG. 1 is a longitudinal sectional view showing a repair structure when the foamed resin 5 and the FRP 6 are used as a repair material for the damaged cavity 2 of the tree 1 shown in claim 1. It goes without saying that the removal of the corrosion in the damaged cavity 2 of the tree 1 and the antiseptic treatment are performed in advance.

In filling the foamable resin 5 into the damaged cavity 2 in FIG. 1 and lining the FRP 6 as the next operation, the foamed resin 5 being foamed and the FRP 6 to be lined thereafter from the bark 4 (the formation layer also) In order to protect the masking tape, the masking tape may be adhered to the bark 4 at the periphery of the cavity opening (not shown).
Various foamable resins 5 are available. In the present invention, the foamed urethane 5a is the most suitable among them, and the following description will be made by taking the case of using this as an example.

The foamed urethane 5a is mixed with the liquid A (the main urethane resin) and the liquid B (curing agent), injected into the damaged cavity 2 and foamed, and the foaming pressure fills the details of the void in the damaged cavity 2 And wait for subsequent solidification. After solidification, the foamed urethane 5a protruding outward from the surface of the bark 4 is shaped to resemble the bark 4 while being removed with a blade to a position recessed by about 3 mm from the tree surface 11 of the tree 1, and then the shaped surface 10 is lined with FRP 6 with a thickness of about 3 mm to form a repair surface 12. The lining of FRP6 has a shape in which two cloth-like glass fibers are solidified with unsaturated polyester.
The above is the repair structure (configuration) in FIG. 1, but after that, it waits for coating of the repair surface 12 of the bark 4 by cell division of the formation layer of the bark 4.

  The foamed urethane 5a as the foamable resin 5 has an expansion ratio of about 50 times at 25 ° C. and about 25 times at 3 to 5 ° C., and the curing (solidification) time is 15 minutes in summer and 30 minutes in winter. In addition, there is a feature that adhesion to the inner surface of the cavity is large and peeling after solidification is small.

  In order to protect the urethane foam 5a, the lining FRP6 is said to have the maximum impact strength among the synthetic resins, and although it is slightly weathered, it is repaired from man-made work (mischief caused by human power). It plays the role of strong skin that protects.

  FIG. 2 shows a paint 7 similar to the bark color of the tree after filling with the foamable resin 5 shown in FIG. 1 and lining the FRP 6 to further prevent the weathering of the FRP 6 surface and ensure the appearance (aesthetics) of the repaired surface. The repair structure which apply | coats is shown. The paint 7 is preferably a water-based paint that can make use of the matte function, and thereby the surface of the tree after repair can be made uncomfortable. A brush or brush is used for applying the paint.

  FIG. 3 shows a repair structure in which a hard resin 8 is applied (overcoated) as a repair material on the surface of the FRP 6 in the repair structure shown in FIG. Here, it is preferable to use the gel-like coating resin 8a as the hard resin 8, so that the coated surface is smooth and hard like a stone. In addition, it has high acid resistance and serves to protect FRP6 from acid rain and weathering.

  FIG. 4 shows a repair structure in which the surface of the hard resin 8 in the repair structure shown in FIG. 3 is further coated with a bark color paint 7 as a repair material in the same manner as described above. The paint 7 is preferably a water-based paint, and this application can make the appearance after the repair feel uncomfortable.

  FIG. 5 is a diagram showing, as an example, FIG. 1 when the foamable resin 5 in the repair structure shown in FIGS.

FIG. 6 shows that the required number of reinforcing aggregates 9 made of, for example, metal or wood having a convex portion is included in the foamed urethane 5a filled in the damaged cavity portion 2 of the tree, and the pressure and weight of strong wind, snow, etc. This is a repair structure that prevents fallen trees and breakage of trees. This repair structure is effective when the damaged cavity 2 is a long and wide cavity. In carrying out the repair structure, a required number of reinforcing aggregates 9 are disposed in the damaged cavity 2 in advance. The foamed urethane 5a is injected and foamed into this, and the reinforcing aggregate 9 is included.
Thereby, the urethane foam 5a is filled and hardened into the fine voids in the damaged cavity 2 while firmly enclosing the reinforcing aggregate 9, so that the external pressure (weight) due to strong winds, snow accumulation, etc. Will also confront and protect trees from fallen trees and broken trees.

  FIG. 7 shows an example in which the hard resin 8 in the repair structure shown in FIGS. 3 and 4 is a gel-like coating resin 8a. The gel-like coating resin 8a can be easily applied with a brush and is also chemically stable, so that it is optimal as a coating material for FRP6.

It is a longitudinal cross-sectional view which shows the repair structure by the repair material of this invention. It is a longitudinal cross-sectional view which shows the repair structure by the repair material of this invention. It is a longitudinal cross-sectional view which shows the repair structure by the repair material of this invention. It is a longitudinal cross-sectional view which shows the repair structure by the repair material of this invention. It is a longitudinal cross-sectional view which shows the repair structure of this invention taking FIG. 1 as an example. It is a longitudinal cross-sectional view which shows the repair structure by the repair material of this invention. It is a longitudinal cross-sectional view which shows the repair structure of this invention taking FIG. 3 as an example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tree 2 Damaged cavity 3 Tree part 4 Bark 5 Foamable resin 6 FRP
7 Paint 8 Hard resin 9 Reinforcement aggregate 10 Shaped surface 11 Wood surface 12 Repair surface 5a Urethane foam 8a Gel coating resin

Claims (7)

  A tree formed by filling foam damage resin into a damaged cavity portion of a tree subjected to corrosion removal and sterilization treatment, and lining (coating) FRP on a shaping surface formed by shaping after the foam resin is solidified Repair structure for damaged cavities.   FRP is lined on the shaping surface formed by filling foam damage resin into the damaged cavity of the tree that has been subjected to corrosion removal and sterilization treatment, and shaping the foam resin after solidification. Repair structure of damaged cavities of trees by applying bark color paint on the surface after solidification.   FRP is lined on the shaping surface formed by filling foam damage resin into the damaged cavity of the tree that has been subjected to corrosion removal and sterilization treatment, and shaping the foam resin after solidification. A structure for repairing damaged cavities in trees, which is formed by applying a hard resin that protects FRP to the surface after solidification.   FRP is lined on the shaping surface formed by filling foam damage resin into the damaged cavity of the tree that has been subjected to corrosion removal and sterilization treatment, and shaping the foam resin after solidification. A structure for repairing a damaged cavity portion of a tree obtained by applying a hard resin that protects FRP to the surface of the hard resin after solidification, and further applying a bark color paint of the tree to the surface of the hard resin.   The repair structure for a damaged cavity portion of a tree according to claim 1, wherein the foamable resin is foamed urethane.   A repair structure for a damaged cavity portion of a tree in which the urethane foam according to claim 5 contains a required number of reinforcing aggregates having convex portions on the surface thereof.   The repair structure for a damaged cavity portion of a tree according to claim 3 or 4, wherein the hard resin is a gel-like coating resin.

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