JPH0566121U - Reinforcement bamboo material for construction - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a reinforcing bamboo material for construction which has stable strength characteristics required as a construction structural material while making the most of its goodness without impairing the decorative effect of the natural material of bamboo material. [Structure] Inside of a hollow bamboo body 1, a reinforcing member 2 formed in a spiral shape is inserted along the inner circumference thereof, and a resin 3 is filled, and the resin 3 is cured to reinforce the reinforcing member 2.
Is integrally connected to the inner peripheral portion of the bamboo body 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reinforcing bamboo material for construction used as a beam material, a pillar material, a floor material, etc. in a building structure.

[0002]

[Prior Art]

 Bamboo is generally used as a decoration for building structures because of its low strength, and is rarely used as a beam, pillar, or flooring material to which high load is applied.

[0003]

[Problems to be solved by the device]

 Bamboo material is weak in the force acting in the direction perpendicular to the longitudinal direction, has a low bending strength when used as a beam material, and tends to buckle when used as a pillar material. In addition, since it is a natural material, it has large variations in mechanical properties such as strength and elastic modulus, and as a result, it is the fact that there are major restrictions on its use as a building structural material.

The present invention has been made paying attention to such a point, and the purpose thereof is to maintain the decorative effect of bamboo as a natural material, and to make the best use of the goodness of the material, while making it necessary as a building structural material. It is intended to provide a reinforced bamboo material for construction having stable strength characteristics.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention inserts a spirally shaped reinforcing member along the inner circumference of the hollow bamboo main body and fills it with resin, and cures this resin. The reinforcing member is integrally joined to the inner peripheral portion of the bamboo body. As the reinforcing member, for example, a high-strength, low-elongation fiber impregnated with a thermosetting resin and hardened is used, and a hollow body surrounded by the resin filled inside the bamboo body main body is used. It is possible to form.

[0006]

[Action]

 Such a reinforced bamboo material for construction is reinforced by a reinforcing material provided on the inner peripheral portion of the bamboo material main body and has a stable strength required as a building structural material. When the reinforcing member is made of a fiber composite material, the adhesion between the reinforcing member and the resin filled inside the bamboo material main body is good, and the reinforcing member is securely bonded and integrated with the bamboo main body, so that long-term A stable reinforcing effect can be obtained over the entire range.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a bamboo body, and the bamboo body 1 has a hollow pipe-like shape in which the inside of each step is hollowed out, for example, the diameter D is 76 mm, the wall thickness t is 9.5 mm, and the length is 9.5 mm. The length L is 500 mm.

A reinforcing member 2 formed in a spiral shape is inserted inside the bamboo material body 1 so as to follow the inner circumference thereof. Further, for example, a thermosetting resin 3 is filled inside the bamboo material body 1, and the reinforcing member 2 is integrally connected to the inner peripheral portion of the bamboo material body 1 by this resin 3. A cavity 4 surrounded by the resin 3 is secured at the center of the bamboo body 1.

The reinforcing member 2 is made of a large number of high-strength, low-elongation fibers such as carbon fibers, silicon carbide fibers, aramid resin, glass fibers, and polyvinyl alcohol fibers, which are bundled, braided, or twisted to form a fiber bundle. A thermosetting resin such as an epoxy resin, an unsaturated polyester resin, or a polyimide resin is impregnated with the resin, and the fiber bundle is spirally molded and cured. In the reinforcing member 2 of this example, the fiber bundle had a diameter of 5.0 mm, a cutting load of 3250 kgf, and an elastic modulus of 15200 kgf / mm ^2. Is.

To describe the process of manufacturing such a reinforcing bamboo material for construction, first, the reinforcing member 2 formed in a spiral shape is inserted into the bamboo material main body 1. Then, as shown by a chain line in FIG. 1, a pipe 5 such as a steel pipe is inserted into the bamboo body 1 through the inside of the reinforcing member 2. Next, a thermosetting resin liquid is injected into the gap between the pipe 5 and the bamboo body 1, and the resin is cured in an atmosphere of about 60 ° C. for about 24 hours. After this, the pipe 5 in the bamboo body 1 is pulled out. Thereby, the cavity 4 is formed.

Such a reinforcing bamboo material for construction is reinforced by the composite fiber material 2 provided on the inner peripheral portion of the bamboo material main body 1 and has a stable strength required as a building structural material. Further, since the reinforcing member 2 is the fiber composite material, the adhesion between the reinforcing member 2 and the resin 3 is good, and the reinforcing member 2 is surely bonded and integrated with the bamboo material main body 1 and thereby stable for a long period of time. The reinforcing effect can be obtained.

In order to confirm the reinforcing effect of the reinforced bamboo material of the present embodiment, as shown in FIG. 3 and FIG. 4, a loading plate W is placed on the bamboo material a and a side pressure proof test for applying a load P is performed. At all, the results shown in Table 1 below were obtained.

[0014]

[Table 1]

As is clear from Table 1, the reinforced bamboo material of the present example does not break even under a load of about 7 times that of normal bamboo material, and returns to the original shape when unloading. It can be seen that it exhibits excellent proof stress improvement and resilience.

On the other hand, the reinforced bamboo material of the present example has only the reinforcement member 2 provided inside the bamboo material main body 1, so that there is no difference in appearance from the ordinary bamboo material, and therefore the natural bamboo material is used. It can be used as a structural material for construction, making good use of its goodness without impairing the decorative effect.

In addition, a hollow 4 remains in the center of the inside of the bamboo body 1, so that an increase in weight can be suppressed to a small level, and the hollow 4 makes the entire reinforcing bamboo hollow and the inner peripheral surface thereof is made of resin. It becomes a pipe shape covered with 3. Therefore, while using the reinforcing bamboo material as a building structure, this reinforcing bamboo material can also be used as a transfer pipe for liquid or steam without worrying about corrosion of the bamboo body 1 etc. It becomes possible to do.

In the above embodiment, the pipe 5 used when injecting the resin liquid into the bamboo body 1 is pulled out after the resin is hardened, but it can be left as it is. When a pipe made of fiber reinforced plastic is used as the pipe 5, there is little increase in weight due to the pipe 5, and the pipe 5 has the advantage that the strength of the reinforcing bamboo material can be further improved. is there. Further, when the resin liquid is injected into the inside of the bamboo body 1, an air bag or the like can be used instead of the pipe 5.

Further, in terms of weight reduction, it is advantageous to leave the cavity 4 inside the reinforced bamboo material, but when the influence of the increase in weight can be excluded, the resin 3 is applied to the entire inside of the bamboo material main body 1. There is no problem in filling. Then, it is possible to provide the reinforcing member 2 in multiple layers inside the bamboo body 1 to obtain the required strength.

[0020]

[Effect of the device]

 As described above, according to the present invention, it is possible to provide a reinforced bamboo material for construction which does not impair the decorative effect of the bamboo material as a natural material and makes good use of it, and which has stable strength characteristics required for a building structure material. You can

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a reinforcing bamboo material for construction according to an embodiment of the present invention.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a front view showing a state of implementation of a lateral pressure proof test on a bamboo material.

FIG. 4 is a side view of the same.

[Explanation of symbols]

 1 ... Bamboo body 2 ... Reinforcing member 3 ... Resin 4 ... Cavity

Claims (3)

[Scope of utility model registration request] 1. A hollow bamboo body main body is inserted with a reinforcing member formed in a spiral shape so as to fit along the inner circumference of the hollow bamboo main body, and is filled with resin. The resin is hardened to fix the reinforcing member to the bamboo body main body. Reinforced bamboo material for construction, which is integrally bonded to the inner circumference. 2. The reinforcing bamboo material for buildings according to claim 1, wherein the reinforcing member is made by impregnating a high-strength, low-elongation fiber with a thermosetting resin and curing the fiber. 3. The reinforcing bamboo material for construction according to claim 1, wherein a cavity surrounded by a resin filled inside the bamboo material body is formed inside the bamboo material body.