JP5384993B2 - Preservation method of laminated lumber - Google Patents

Description

  The present invention relates to a method for preserving laminated wood. More specifically, the present invention relates to a method for preserving a laminated material (laminate material) used for construction such as a house.

  Wood can be kept stable for a long time in a dry state. This is clear from the fact that many wooden buildings (for example, Horyuji Temple) have maintained the original shape for over 1000 years.

  However, although wood exhibits excellent durability in a dry state, it has a defect that when it is in a water-containing state, it easily decays due to the action of decaying fungi. For example, piles driven into the ground contain water, so if they are not treated with antiseptics, they will decay in a short period (several years) due to the action of decaying fungi in addition to termite damage, often losing their original shape. End up.

  In an era when there are abundant timber resources, for example, the corners of houses (corners for foundations) are made of wood (excellent materials) with excellent durability, such as chestnuts and cypresses, to cope with decay. However, in recent years, such excellent materials have become expensive due to depletion of wood resources, and it is inevitable to use wood that is inferior in durability compared to excellent materials such as Batesga and Radiata Pine.

  When such inferior wood is used for a corner or the like, it is necessary to perform an antiseptic treatment to cope with decay. This is because, by performing an appropriate antiseptic treatment, it is possible to maintain a stable state for a long period of time as in the case of excellent materials.

Conventionally, as a method for preserving wood (including laminated wood), wood is repeatedly compressed and released in a heated chemical solution (see, for example, Patent Document 1), and a preservative is uniformly applied to the inside of the wood. Insizing processing methods (see, for example, Patent Documents 2 and 3) that can be permeated into the glass have been developed.
As shown in FIG. 11, the insizing processing method applies an infinite number of blade scratches C by pressing a needle-like or nail-like blade against the surface of the wood 20, and the preservative easily penetrates into the inside from the blade scratches C. To do.

  Furthermore, a method of inserting a needle into the wood and injecting a preservative from its tip (see, for example, Patent Document 4), or making a through-hole in the wood and introducing the preservative into the wood, A method of gradually infiltrating the inside (for example, see Patent Document 5) has also been developed.

JP 2001-277204 A JP 56-69102 A JP 2002-283305 A JP 2002-187107 A Japanese Patent Laid-Open No. 11-172807

However, the conventional antiseptic treatment method described above has the following problems.
(1) Infiltration of the preservative is insufficient (preservation treatment method described in Patent Document 1).
The method described in Patent Document 1 is effective for a thin-walled wood, but a preservative is applied to a thick-walled wood (for example, a base angle (wall thickness: 105 to 120 mm)). Difficult to penetrate inside.
As a result, the inside may decay and become hollow, leaving a surface portion into which the preservative has permeated.

(2) It takes a long time for the antiseptic treatment (the antiseptic treatment method described in Patent Document 1).
When the thickness of the wood 20 (glued wood 1) is large (for example, in the case of a 120 mm × 120 mm prism), as shown in FIG. 13, the preservative S adhering to the surface is long distance to the center portion of the wood 20 ( It is necessary to penetrate 60 mm at the shortest. In addition, after the preservative S is infiltrated to the center of the wood 20, it is necessary to remove excess solvent, but this solvent also needs to penetrate in a reverse direction over a long distance (60 mm at the shortest). Although such an action can be promoted using a compression device, it usually requires 1-2 days of processing time.

  If the penetration of the preservative S is insufficient, there is a risk of decay. Moreover, if the removal of the solvent is insufficient, there will be health problems for residents, and there will be problems such as deformation of the wood as it dries.

In order to facilitate the penetration of the preservative and the removal of the solvent, it is conceivable to make a vent hole H in the center of the wood 20 as shown in FIG.
However, in this case, a special drill having a length that is at least half the total length of the wood 20 is required, and the operation is troublesome. Further, the vent hole H may be displaced due to the eccentricity of the drill. Further, there is a problem that the strength is insufficient when the bolt is tightened as described later (7).

(3) The weight of the wood increases (the antiseptic treatment method described in Patent Documents 1, 2, 3, and 4).
If the solvent is sufficiently removed after treatment with the preservative, the increase in the weight of the wood is 1% or less. However, if the removal is insufficient, the weight is greatly increased. For example, since the base angle is a long and large material having a length of about 4 m, it becomes more difficult to transport and store.

(4) The surface of the wood is rough (the antiseptic treatment method of Patent Documents 2 and 3).
In the insizing process described in Patent Documents 2 and 3, as shown in FIG. 11, in order to make an infinite number of scratches on the surface of the wood 20 with the blades, uneven blade scratches C are formed on the surface of the base corners. End up. Since this knife flaw C is deep, even if the surface is polished and painted, it does not become a smooth surface, and therefore the cosmetic properties are poor.
In order to make the blade scratch C inconspicuous, it is conceivable to cut the blade so that the blade scratch C becomes a thin line. However, when the blade is removed from the wood 20, the cut formed with the blade is considered. Is blocked by the elasticity of the wood 20. As a result, the penetration of the preservative becomes insufficient or the penetration takes time.

(5) The strength of the wood is reduced (preservation method described in Patent Documents 2 and 3).
Usually, an insizing blade cuts fibers on the surface portion of the wood, and this surface portion is the portion where the bending moment acts most strongly, so the strength of the wood is reduced (usually several percent) -20%).

(6) The antiseptic effect is slow and uncertain (the antiseptic treatment method described in Patent Document 5).
Since the method described in Patent Document 5 requires a long period of time for the preservative component to penetrate into the wood, there is no immediate effect, and therefore, the damage of termites and decaying fungi is affected until the preservative effect is exerted. There is a risk of encountering. Further, the preservative cannot be reliably infiltrated into the whole wood, and therefore the antiseptic effect is uncertain.

(7) Wood is damaged by bolts (preservation method described in Patent Document 5).
For example, as shown in FIGS. 14 and 15, when a through hole P is drilled in the base corner (wood 20), the anchor bolt 11a for fixing the wood to the fabric foundation and the adjacent base corners are joined together. When the horizontal bolt 11b is tightened, the base angle is easily damaged. This also causes loosening of the bolts 11a and 11b.

  Therefore, the object of the present invention is to easily and sufficiently permeate the preservative into the laminated wood, which is wood, without damaging the laminated wood, increasing its weight, and maintaining its strength sufficiently. An object of the present invention is to provide an antiseptic treatment method that can be used.

In order to achieve the above object, the preservative processing method for laminated timber according to claim 1 of the present invention is a method for preserving a laminated timber (1) constituted by laminating a plurality of laminas (2). There,
On one side of the lamina (2), one or more grooves (G) are formed along the fiber direction to form a grooved lamina (2a), and on at least one side of the grooved lamina (2a), After the regular lamina (2b), which is the lamina (2) in which the groove (G) is not formed, is fixed to constitute the laminated material (1), the constructed laminated material (1) is preserved with the preservative (S). The preservative (S) is infiltrated into the inside from the surface of the laminated material (1) and the groove (G) by dipping in the liquid agent (L) to be contained.

  The “fiber direction” refers to the direction indicated by the arrow in FIG. 16 (the direction orthogonal to the annual rings) (hereinafter the same).

Moreover, the antiseptic processing method of the laminated material of Claim 2 is a method of preserving the laminated material (1) comprised by laminating | stacking several lamina (2),
On one side of the lamina (2), one or more grooves (G) are formed along the fiber direction to form a grooved lamina (2a), and a plurality of the grooved laminas (2a) are formed in the same direction. The laminated structure (1) is formed by laminating one sheet and fixing one or a plurality of normal lamina (2b), which is a lamina (2) in which grooves (G) are not formed on both sides, and then the above composition The laminated material (1) is dipped in a liquid agent (L) containing a preservative (S), and the preservative (S) is introduced from the surface of the laminated material (1) and the groove (G) to the inside thereof. It is made to infiltrate.

  Moreover, the preservative processing method of the laminated material according to claim 3 is characterized in that one or a plurality of normal laminaes (2b) are interposed between the plurality of grooved laminas (2a).

  Symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and the best mode for carrying out the invention described later.

According to the preservative treatment method for laminated lambs according to claim 1 of the present invention, the following effects are exhibited.
(1) The preservative penetrates sufficiently.
Since the groove | channel is formed in the laminated material immersed in the liquid agent containing an antiseptic | preservative, preservative permeate | transmits not only from the surface of a laminated material but the groove | channel. Therefore, the preservative sufficiently penetrates the entire laminated wood.

(2) The preservative treatment time is short.
Since the groove is provided in the laminated material, the penetration distance of the preservative can be shortened. In addition, the removal of the solvent after penetration of the preservative can be shortened as well. When the thickness of the laminated material is large (for example, in the case of a 120 mm × 120 mm prism), conventionally, it has been necessary to penetrate a distance of 60 mm at the shortest, but in the present invention, although it depends on the position and number of grooves, Can be shortened to about 1/2 to 1/4. Accordingly, the antiseptic treatment can be performed in a short time.

(3) The weight of the laminated wood can be reduced.
The removal of the solvent after the preservative treatment can be performed reliably. Therefore, it is possible to prevent a situation in which the weight of the laminated material increases due to the remaining solvent. Moreover, the weight of the laminated material can be reduced also by forming the groove (the maximum can be reduced by about 30% while maintaining the required strength).

(4) No surface roughness.
Since the blade scratches are not formed on the laminated material as in the sizing process, the surface can be maintained as a smooth surface without irregularities, and the cosmetic properties are excellent. Therefore, this laminated material is suitable, for example, when it is used as a foundation angle that is visually recognized from the outside.

(5) The strength does not decrease.
Since the groove is formed not in the surface portion of the laminated material (the portion where the bending moment acts most strongly) but in the inside thereof, the strength of the laminated material can be maintained sufficiently. Moreover, since the groove | channel is formed along the fiber direction, a some fiber is not cut | disconnected. Also by this, the intensity | strength of a laminated material can be maintained high.

(6) The antiseptic effect is quick and reliable.
Since the laminated material which formed the groove | channel is immersed in the liquid agent containing a preservative, a preservative can be osmose | permeated rapidly in a short time. Therefore, the antiseptic effect is exhibited immediately after the antiseptic treatment.

  Further, according to the preservative treatment method for a laminated material according to claim 2, the same effects as those of the invention according to claim 1 are exhibited. In addition, multiple laminated lamina with grooves are laminated in the same direction, and usually one or more lamina is fixed to both sides to form laminated wood, so a groove is placed in the center of thick laminated wood can do. Therefore, an antiseptic treatment can be effectively applied to this thick laminated material.

  Moreover, according to the preservative treatment method of the laminated material according to claim 3, in addition to the operational effect of the invention according to claim 2, one or a plurality of normal laminaes are provided between the plurality of grooved laminaes. Since they are interposed, the positions of the grooves can be dispersed. Also by this, an effective antiseptic treatment can be applied to the thick laminated material.

  With reference to FIG. 1 thru | or FIG. 3, the antiseptic processing method of the laminated material which concerns on embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing a lamina 2 (grooved lamina 2 a) constituting the laminated material 1, and FIG. 2 is a perspective view showing the laminated material 1 constituted by a plurality of lamina 2. FIG. 3 is a perspective view showing a state in which the laminated material 1 is immersed in a liquid L containing an antiseptic S.

  The laminated material 1 in this embodiment is used as a base angle (a base fixed to the cloth foundation 10 of a house), and is configured by laminating a plurality of laminas 2. In addition, this laminated material 1 can also be used as other members, such as a pillar and a beam, besides a base angle.

The laminated material 1 in this embodiment is formed by laminating six laminaes 2 and is subjected to antiseptic treatment as follows. First, as shown in FIG. 1, two grooves G are formed on each side of the lamina 2 along the fiber direction to form a grooved lamina 2a. Two pieces of this lamina 2a with a groove | channel are formed.
Next, as shown in FIG. 2, the two laminated laminas 2a are laminated in the same direction (the arrangement direction of the lamina 2 and the groove G is the same), and the lamina in which the groove G is not formed on both surfaces thereof. Two normal laminas 2b that are 2 are arranged in the same direction (the lamina 2 is arranged in the same direction) and fixed. Thereby, the laminated material 1 is comprised.

  And as shown in FIG. 3, this laminated material 1 is immersed in the liquid agent L containing the preservative S stored in the immersion container R for a fixed time. As a result, as shown by the arrows in FIG. 4, the preservative S penetrates from the surface of the laminated material 1 and the groove G to the whole including the inside thereof, and the antiseptic treatment is performed. The liquid agent L is a liquid material in which at least the preservative S and the solvent are mixed.

  This laminated material 1 is used as a base angle (120 mm × 120 mm), and therefore the thickness of each lamina 2 is 20 mm. Further, the two grooves G formed in each lamina 2 are formed at a position where the lateral width of the lamina 2 is divided into three equal parts so that the preservative S penetrates evenly into the laminated material 1. Further, the depth of the groove G is set to ½ or more of the thickness of the lamina 2. As shown in FIGS. 2 and 3, the laminated material 1 has a groove G visible from the end face.

  Since the method for preserving laminated wood according to the present embodiment is provided with the groove G, the preservative S can be permeated through the surface of the laminated material 1 and the groove G. Therefore, the preservative S can be sufficiently permeated in a short time to the whole including the central portion of the laminated material 1. Moreover, since the removal of the solvent after the penetration of the preservative S can be reliably performed by providing the groove G, the weight of the laminated material 1 can be reduced. Moreover, weight reduction by providing the groove | channel G can also be achieved.

  Furthermore, since this preservative treatment method is carried out without damaging the surface portion of the laminated material 1, the cosmetic properties can be kept good and the strength is not lowered. This strength is also maintained by forming the groove G along the fiber direction of the laminated material 1. Moreover, since the laminated material 1 is immersed in the liquid L containing the preservative S, the preservative S can be rapidly penetrated, and the antiseptic effect is also exhibited in a short time.

  In addition, when fixing the laminated material (base angle) 1 which concerns on the said embodiment to the fabric foundation 10 with the anchor bolt 11a in the state as shown in FIG. 5, there is no possibility that the groove | channel G may be crushed by the clamp | tightening of the anchor bolt 11a. When the laminated material 1 is fixed to the adjacent laminated material (base angle) 1 with a lateral bolt 11b such as a battledore bolt in the state shown in FIG. 6, the groove G may be crushed.

  In such a case, as shown in FIG. 7, the groove G is not formed in the lamina 2 of the laminated material 1 that penetrates at least the lateral bolt 11b, and the groove G is formed in the upper and lower lamina 2 thereof. Can do. That is, let the part which the horizontal volt | bolt 11b of the laminated material 1 penetrates be the structure shown in FIG. 7, and let the other part be the structure shown in FIG. By doing so, there is no possibility that the groove G will be crushed even if the lateral bolt 11b is tightened too much.

  Moreover, the total length of the laminated material 1 can also be set as the structure shown in FIG. By doing so, as shown in FIG. 8, when the laminated material 1 is fixed to the fabric foundation 10 with the anchor bolt 11a, or as shown in FIG. 9, when fixed with the adjacent laminated material 1 and the lateral bolt 11b. In addition, the groove G is not crushed.

  In addition, although the number and formation position of the groove | channel G are determined by the penetration | invasion degree of the preservative S, for example, when it is not necessary to consider fixation with the volt | bolt 11, as shown in FIG. It is possible to provide.

  Further, the permeation means of the preservative S is not particularly limited. However, since the permeation distance of the preservative S and the solvent is shorter than that of the prior art due to the formation of the groove G, the preservative S may be permeated using a general decompression / pressurization means. However, depending on the material of the laminated material 1 and the number and position of the grooves G, it may be simply immersed in the liquid L containing the preservative S.

In the preservative treatment method of the laminated material according to the present embodiment, after the laminated material 1 is configured, it is immersed in a liquid L containing the preservative S, and the preservative is introduced from the surface of the laminated material 1 and the groove G to the inside thereof. Although S is infiltrated, the preservative S may be infiltrated in the previous stage of constituting the laminated material.
That is, one or more grooves G are formed on one side of the lamina 2 along the fiber direction to form a grooved lamina 2a, and the grooved lamina 2a is immersed in a liquid L containing the preservative S. The preservative S is infiltrated into the inside of the grooved lamina 2a and the groove G. Thereafter, a plurality of laminated laminas 2a infiltrated with the preservative S are fixed, or the laminated lamina 2a infiltrated with the antiseptic S is a lamina 2 in which the groove G is not formed. It is also possible to form the laminated material 1 by fixing one or more sheets.

  By using an insect repellent instead of the preservative S, application in a field related to insect repellent is possible. Moreover, application in a coloring field | area becomes possible by using a coloring agent.

It is a perspective view which shows the lamina (lamina with a groove | channel) which comprises the laminated material in this embodiment. It is a perspective view which shows the laminated material comprised by the some lamina shown in FIG. It is a perspective view which shows the state which immersed the laminated material shown in FIG. 2 in the liquid agent containing antiseptic | preservative. FIG. 4 is an explanatory view showing a state where the preservative penetrates into the laminated material in FIG. 3. It is a perspective view which shows the state which penetrated the anchor bolt to the laminated material shown in FIG. It is a perspective view which shows the state which penetrated the horizontal direction volt | bolt in the laminated material shown in FIG. It is a perspective view which shows other embodiment of the laminated material in this invention. It is a perspective view which shows the state which penetrated the anchor bolt to the laminated material shown in FIG. It is a perspective view which shows the state which penetrated the horizontal direction volt | bolt in the laminated material shown in FIG. It is a perspective view which shows other embodiment of the laminated material in this invention. It is a perspective view which shows the timber in the insizing processing method which concerns on a prior art example. It is a perspective view which shows the wood of the antiseptic processing method which concerns on a prior art example. In the antiseptic processing method concerning a prior art example, it is explanatory drawing which shows the state in which antiseptic | preservative penetrate | invades wood. It is a perspective view which shows the timber in a prior art example (state which penetrated the anchor bolt). It is a perspective view which shows the timber in a prior art example (state which penetrated the horizontal direction volt | bolt). It is a perspective view which shows the fiber direction of wood (lamina).

DESCRIPTION OF SYMBOLS 1 Glulam 2 Lamina 2a Grooved lamina 2b Normal lamina 10 Cloth foundation 11 Bolt 11a Anchor bolt 11b Lateral bolt 20 Wood C Cutlery scratch G Groove H Vent hole L Liquid agent P Through hole R Immersion container S Preservative

Claims (3)

A method for preserving a laminated material composed of a plurality of laminated laminas,
Forming one or more grooves along the fiber direction on one side of the lamina to form a grooved lamina;
After constructing a laminated material by fixing a normal lamina, which is a lamina not forming a groove, on at least one side of the grooved lamina,
A preservative treatment method for a laminated material, wherein the constructed laminated material is dipped in a liquid agent containing a preservative, and the preservative is permeated into the inside of the surface of the laminated material and the groove. A method for preserving a laminated material composed of a plurality of laminated laminas,
Forming one or more grooves along the fiber direction on one side of the lamina to form a grooved lamina;
After laminating a plurality of the laminar with the groove in the same direction, and constituting the laminated material by fixing one or a plurality of normal lamina, which is a lamina not forming a groove on each side,
A preservative treatment method for a laminated material, wherein the constructed laminated material is dipped in a liquid agent containing a preservative, and the preservative is permeated into the inside of the surface of the laminated material and the groove.   3. The method for preserving laminated wood according to claim 2, wherein one or a plurality of normal laminaes are interposed between the plurality of grooved laminaes.

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