KR200242373Y1 - wood for construction - Google Patents

Abstract

The present invention relates to a building timber, by forming at least one groove on the outer peripheral surface of the solid wood, and by pressing the resin into the groove to be molded, to minimize the warpage of the wood as well as to increase the tensile strength of the wood It can be effected.

Description

Wood for construction

The present invention relates to a building timber, and more particularly to a building timber to form a groove in the wood, and to inject the pressure material into the groove to compensate for the shortcomings of the wood.

In general, wooden structures are made of wood, and the main structure of the building is made of wood, and the structure of the furniture (춘 式) structure that weaved and framed the frame such as foundation, pillar, floor, floor, wall, ceiling, floor, roof, etc. )to be.

Here, the wood structure is the most used structure because the weight of the building itself compared to reinforced concrete, brick, stone, light weight, easy construction method, and less construction period and cost, there is a defect that is not fire resistance, durability. Therefore, in areas where buildings are densely populated, such as cities, where the risk of fire and the lack of timber resources are currently avoided, construction of wood is avoided as much as possible. It is intended to maintain strength and fire resistance, and is in the spotlight as a rural housing material.

On the other hand, the wood structure as described above is mainly used as an important member of wood, the advantages of wood are as follows.

First, wood is lighter in weight than other materials, has a high allowable strength relative to weight, and is particularly strong against warpage.

Second, timber can be processed quickly because of its high processing speed, easy maintenance, and easy construction and assembly.

Third, the timber is easy to join the structure because it uses reinforcing steel.

Fourth, wood is easy to biaxially and rebuilt.

Fifth, wooden structures have high vibration deceleration.

Sixth, wood is well associated with natural organic materials.

Seventh, wood naturally has a function of temperature control.

Eighth, wood has a low thermal conductivity and high electrical insulation.

Ninth, wood absorbs sound and reflects and transmits less.

Tenth, wood has the property of absorbing ultraviolet rays, as well as wood has the advantage of beautiful, good texture.

However, the wood used in the wooden structure as described above has the following disadvantages.

First, wood is a combustible material.

Second, wood is a natural material, so there are knots, grains, and grains.

Third, wood is difficult to freely form.

Fourth, wood has a large difference in strength and stiffness of materials and low uniformity compared to other materials.

Fifth, wood is less vulnerable to weathering and ant damage.

Sixth, since wood is boiling, the elasticity in the right direction to the grain is significantly smaller.

Seventh, when wood is subjected to compressive stress, the warping phenomenon increases with time, and the material itself deforms and the displacement is severe at the joint.

Eighth, the wood is not only weak in tensile stress and shear stress, but also weak in composition of the joints.

Ninth, wood is cracked due to changes in the length or volume of wood as drying and water content change.

Tenth, wood is advantageous for long spans in truss beams, and although economically, the bowing increases, resulting in high ceilings.

Therefore, the present invention was devised to solve the problems as described above, forming a groove in an important member of the existing wooden building, and by applying a pressure injection method to the groove to compensate for the disadvantages of wood The aim is to provide building timber that can make the most of its advantages and contribute to revitalizing wooden buildings.

Building wood according to the present invention for achieving the above object is characterized by forming at least one groove on the outer circumferential surface of the solid wood, by molding the resin into the groove.

1 is a process chart showing a process of building wood according to the present invention,

Figure 2 shows the state before the pressure injection into the building timber according to the present invention

Illustrated diagram,

Figure 3 shows the state after the pressure injection into the building timber according to the present invention

Illustrated diagram.

Explanation of symbols on the main parts of the drawing

10: solid wood 11: U-shaped groove

12: sapwood 13: heartwood

14: outer peripheral surface 20: resin

Hereinafter, with reference to the accompanying drawings of the present invention will be described in detail.

1 is a process chart showing a process of building wood according to the present invention, Figure 2 is an exemplary view showing a state before pressurized injection into the building wood according to the present invention, Figure 3 is for a building according to the present invention Exemplary diagram showing a state after pressurized injection into wood.

As shown in these drawings, the building timber according to the present invention forms at least one groove 11 on the outer circumferential surface 14 of the solid wood 10, and pressurizes the resin 20 into the groove 11. By molding.

That is, the present invention is to form a U-shaped groove 11 symmetrically around the outer circumferential surface 14 of the solid wood 10 from the outer circumferential surface 14 of the solid wood 10 to the inner circumferential core 13 toward the inner circumferential surface 13. .

Here, the reason why the plurality of U-shaped grooves 11 are formed in the wood 10 is not only to provide a foundation to pressurize the resin 20, but also to distort the wood 10 when used in a building. This is to prevent warping.

Therefore, after the grooves 11 are formed in the wood 10 as described above, the entirety of the grooves 11 is filled with the resin 20 by pressure injection, and then dried.

Here, the resin 20 may be used a variety of resin 20, it is to be understood that not limited to any particular resin 20 is used a variety of resin 20 throughout.

Hereinafter, to describe the present invention in more detail look at the nature and properties of wood.

In general, the moisture content of the structural wood is 25% or less, the moisture content of the dry state is 10-15% and the water content of the fiber saturation point is 30%.

In other words, the characteristics of wood is that when the water content is less than the fiber saturation point, the strength is rapidly increased, the strength is almost constant above the fiber saturation point, and has about one-fourth the strength of the dry state of zero moisture content, fiber saturation If the condition is past the point, it increases by 35% of the minimum strength of the wood (the highest water content).

The specific gravity of wood is 0.4 ~ 0.8 and conifer is 0.6 as standard.

That is, the moisture content of the tree is 30 to 100%, so if the specific gravity is indicated as the whole building material, the fiber material is about 1.54 regardless of the species.

In particular, if the moisture content is more than the fiber saturation point (30%), the strength is constant and the strength increases with the decrease of the moisture content, the strain is also different depending on the fiber direction and the strain is also dependent on the stress.

If wood needs drying treatment, air drying method (3-12 months), submersion method (2 weeks), etc. take a long time, so artificial drying method is used, such as steam method, boiling method, hot air drying method, etc. It is shortened by about one day and steam drying is widely used.

Look at the manufacturing process of building timber according to the present invention made of a configuration as described above.

1. The material selection and importing step confirms the actual required dimensions, quantity, quality grade, and material type, and selects the material in consideration of market ready materials and custom products, and then imports them.

2. In the drying step, the material brought in through the material selection and carrying-in step is naturally dried using a natural drying method.

3. The processing step is a step of cutting the material dried by the drying step to an appropriate size.

4. In the machine drying room step, the material processed through the above processing step is artificially dried again using steam drying method.

5. Pressurizing material injection step is a step of inducing a chemical warfare by forming a groove (11) for the material dried through the mechanical drying chamber step, and injecting a resin (20).

6. The site transport step is a step of bringing the material through the pressurized material injection step into the site.

7. The site assembly phase is the construction of wooden buildings using materials brought into the site.

As described above, the building timber according to the present invention has the following effects.

First, water resistance is strong due to resin injection inside the sapwood of wood. (Insect, insect, smoke)

Second, there is no need for additional preservation treatment for wood.

Third, there is an advantage of extending the life of the building.

Fourth, it is possible to minimize the warpage of wood due to resin injection.

Fifth, because the transparent resin is used, the unique pattern of wood can be utilized.

Sixth, the rate of ignition falls when a fire occurs (flammability).

Seventh, the tensile strength of wood increases due to resin injection.

Eighth, there is an advantage in the restoration of traditional hanok and cultural assets.

Ninth, there is an advantage that can contribute to the activation of the log house as a rural house.

Claims (2)

At least one groove is formed on the outer circumferential surface of the solid wood, and the building timber, characterized in that the resin is molded by pressing the groove. The building timber according to claim 1, wherein the resin is injected into the grooves to inject resin to the inside of the sapwood.