JP6960724B2 - Refractory wood material - Google Patents

Description

The present invention relates to a refractory wood member suitable for use as a building structural member such as a pillar.

Generally, since the cross-sectional shape of the conventional refractory wood member is rectangular, the thermal effect when the right-angled corners are heated is the largest. Therefore, in the conventional refractory wood member, various measures are taken to ensure the fire resistance performance of the corners (see, for example, Patent Documents 1 to 4).

FIGS. 5 (1) to 5 (3) show cross-sectional examples of conventional refractory wood members. The structure of FIG. 5 (1) is shown in the above-mentioned Patent Document 1, and includes a load support portion 1 made of wood, an outer peripheral portion 2 exposed to the outside outside the load support portion 1, and a load. It is provided with a reinforcing member 3 arranged at a corner portion outside the support portion 1 at a position not exposed to the outside. The reinforcing member 3 is composed of a member having a higher density after carbonization than the member of the outer peripheral portion 2. Further, the structure of FIG. 5 (2) includes a load support portion 1, a mortar portion 4, a burn stop layer 5, and a burn allowance layer 6. Further, the structure of FIG. 5 (3) corresponds to the above-mentioned Patent Document 3, and includes a load support portion 1, a second burn-stop layer 7, and a first burn-stop layer 8.

Japanese Unexamined Patent Publication No. 2012-136939 Japanese Patent No. 4871660 Japanese Unexamined Patent Publication No. 2015-129431 JP-A-2015-061969

However, in the above-mentioned conventional structure, in order to improve the fire-resistant performance of the corner, a material having high fire-resistant performance is specially used for the portion, or the entire member is covered with the thickness of the fire-resistant coating required for the corner. The coating layer (the portion indicated by reference numeral 9 in FIG. 5) was thickened. Therefore, there are problems that the manufacturing method of the refractory wood member becomes complicated and the coating layer becomes thick, so that the cost increases and the cross section of the member also becomes large.

Therefore, there has been a demand for the development of a refractory wood member capable of slimming the cross section of the member while having the same structural performance as the conventional one.

The present invention has been made in view of the above, and an object of the present invention is to provide a refractory wood member capable of slimming the cross section of the member.

In order to solve the above-mentioned problems and achieve the object, the fire-resistant wood member according to the present invention is a wood member having fire resistance, and the cross-sectional shape of the core material made of the wood material that supports the load is at least pentagonal. The above-mentioned polygonal shape is characterized in that the angles of all the cross-sectional corner portions of the polygonal shape are obtuse angles.

Further, the other refractory wood member according to the present invention is characterized in that, in the above-mentioned invention, it further includes a burn-off layer or a finishing material provided on the outside of the core material.

Further, another refractory wood member according to the present invention is characterized in that, in the above-described invention, it further includes a burn-stop layer provided on the outside of the core material and a finishing material provided on the outside of the burn-stop layer.

Further, in the other fire-resistant wood member according to the present invention, in the above-mentioned invention, the entire cross-sectional shape including the burn-off layer provided on the outside of the core material or the core material of the finishing material has a circular shape, an elliptical shape, or an oval shape. It is characterized by having a polygonal shape similar to the shape, oval shape, or cross-sectional shape of the core material.

Further, the other refractory wood member according to the present invention is a wood member having fire resistance, and is characterized in that the cross-sectional shape of a core material made of a wood material that supports a load is circular.

According to the fire-resistant wood member according to the present invention, the cross-sectional shape of the core material, which is a wood member having fire resistance and is made of a wood material that supports a load, is a polygonal shape of at least five angles or more, and all of the polygonal shapes. Since the angle of the cross-sectional corner is obtuse, the angle of the cross-sectional corner of the core material, which is a weak point in ensuring fire resistance, is gentler than that of the conventional rectangle (the angle of the cross-sectional corner is a right angle). Because of this, it is less susceptible to the effects of two-sided heating. Therefore, according to the present invention, the fire resistance performance of the corner portion can be remarkably improved as compared with the case where the cross-sectional shape of the core material is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced. Further, by using this refractory wood member for a pillar or the like in the room, the openness of the room space is enhanced, and the room can be effectively utilized.

Further, according to the other fire-resistant wood member according to the present invention, since the burn-stop layer or the finishing material provided on the outside of the core material is further provided, the heat transfer to the core material due to the fire is suppressed by the burn-stop layer. , It has the effect of preventing carbonization and combustion of the core material. In addition, the finishing material has the effect of giving a wood texture to the outside of the core material.

Further, according to the other fire-resistant wood member according to the present invention, a burn-stop layer provided on the outside of the core material and a finishing material provided on the outside of the burn-stop layer are further provided. It suppresses the transfer of heat to the core material, prevents carbonization and combustion of the core material, and has the effect of giving a wood texture to the outside of the core material by the finishing material.

Further, according to the other fire-resistant wood member according to the present invention, the entire cross-sectional shape including the burn-off layer provided on the outside of the core material or the core material of the finishing material has a circular shape, an elliptical shape, an oval shape, and an egg. Since the shape is a polygonal shape similar to the cross-sectional shape of the core material, the fire resistance performance of the corners can be remarkably improved as compared with the case where the cross-sectional shape of the core material is rectangular, and the degree of freedom in design can be improved. It plays the effect.

Further, according to the other refractory wood member according to the present invention, since the cross-sectional shape of the core material which is a fire-resistant wood member and is made of a wood material that supports a load is circular, the cross-sectional shape of the core material is circular. The fire resistance can be significantly improved as compared with the case where is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced. Further, by using this refractory wood member for a pillar or the like in the room, the openness of the room space is enhanced, and the room can be effectively utilized.

FIG. 1 is a cross-sectional view showing a first embodiment of a refractory wood member according to the present invention. FIG. 2 is a cross-sectional view showing a second embodiment of the refractory wood member according to the present invention. FIG. 3 is a cross-sectional view showing a third embodiment of the refractory wood member according to the present invention. FIG. 4 is a diagram showing the results of analysis performed for verifying the action and effect of the present invention. FIG. 5 is a cross-sectional view showing an example of a conventional refractory wood member.

Hereinafter, embodiments of the refractory wood member according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
First, Embodiment 1 of the present invention will be described.
As shown in FIG. 1, the refractory wood member 100 according to the first embodiment includes a core material 10, a burn stop layer 12 provided on the outside of the core material 10, and a finishing material provided on the outside of the burn stop layer 12. It is provided with 14.

In the present embodiment, the cross-sectional shape of the core material 10 is a regular octagon (polygonal shape of pentagons or more), and the internal angle θ (angle) of each cross-sectional corner portion 16 is 135 ° (obtuse angle). Further, the cross-sectional shape including the core material 10 and the burn-off layer 12 is also a concentric regular octagonal shape, and the cross-sectional shape of the entire refractory wood member 100 including the finishing material 14 is also a regular octagonal shape. ..

As described above, in the present embodiment, the cross-sectional shape of the core material 10 is made octagonal in order to reduce the thermal influence on the cross-sectional corner portion 16 of the refractory wood member 100. The cross-sectional shape of the core material 10 is not limited to the octagonal shape, and may be a polygonal shape or a circular shape other than the pentagonal shape, but the octagonal shape is preferable because it is easy to manufacture. Here, the polygonal shape having a pentagon or more means a polygonal shape having a pentagon or more in which the internal angles θ of the corners of the polygonal shape are all obtuse angles. , N-angle shape such as ten-sided shape (however, N is a Chinese numeral representing an integer of 5 or more. The same applies hereinafter), regular pentagonal shape, regular hexagonal shape, regular seven-sided shape, regular octagonal shape, regular nine-sided shape, A regular N-sided shape such as a regular pentagonal shape can be exemplified.

When the cross-sectional shape of the core material 10 is an octagonal shape as in the present embodiment, it is easy to manufacture because it can be manufactured by cutting one corner of a member having a rectangular cross section and assembling four of these members. Further, the cross-sectional shape including the core material 10 and the burn-off layer 12 and the overall cross-sectional shape including the finishing material 14 are not limited to the octagonal shape, and other polygonal shapes, circular shapes, elliptical shapes, and oval shapes are not limited to the octagonal shape. It may be in the shape of an egg. When the overall cross-sectional shape is an elliptical shape, an oval shape, or an egg shape, the cross-sectional shape of the core member 10 may be formed so that a pair of opposing sides is a long polygonal shape. It is also desirable to apply special refractory measures or covering materials to the corners 16 of the cross section so that the entire cross section is not thickened.

The core material 10 is made of laminated lumber (wood material) that supports a load. As the core material 10, for example, a general laminated lumber made of sugi, larch, or the like can be used. The thickness (distance between opposite sides) of the core material 10 can be appropriately adjusted according to the intended use, but can be, for example, about 450 mm.

The non-combustion layer 12 is a coating layer having fire resistance, for example, an inorganic material having endothermic and heat insulating properties, a non-combustible material that is hard to burn, or a nonflammable material that foams when it receives heat and significantly increases its thickness to have heat insulating properties. It can be composed of a material such as a refractory sheet or a refractory film that expresses. The non-burning layer 12 has a function of preventing heat transfer to the adjacent inner core material 10 and not carbonizing or burning the core material 10 in the event of a fire, and suppresses heat conduction to the core material 10. It works. When the non-burning layer 12 is made of an inorganic material, a board-like material such as a reinforced gypsum board, a gypsum board, or a calcium silicate board can be used. Further, the thickness thereof can be appropriately adjusted according to the application. The thicker the thickness, the better the effect of suppressing heat conduction. These boards may be stacked to a predetermined thickness. Here, materials such as reinforced gypsum board, gypsum board, and calcareous board (calcium silicate board) are suitable as the non-burning layer 12 because they can be obtained at an extremely low price and have high heat insulating properties and endothermic properties. .. When the non-combustible layer 12 is made of a non-combustible material, for example, non-combustible wood obtained by impregnating wood with a chemical such as boric acid and treating it with non-combustible material can be used. The thickness of the burn-off layer 12 can be appropriately adjusted according to the application, but is preferably about 15 mm to 45 mm, more preferably about 30 mm, for example. When the non-burning layer 12 is made of the above-mentioned material such as a refractory sheet or a refractory film, its thickness can be appropriately adjusted according to the application, but is preferably about 1 mm to 12 mm, for example. , 1.5 mm to 6 mm is more preferable.

The finishing material 14 is made of wood and is provided to give a wood texture to the outside of the burn-off layer 12. Therefore, the outer surface of the refractory wood member 100 has a wood texture or a wood grain appearance due to the finishing material 14. It is desirable that the finishing material 14 is a wood-based material such as wood or laminated lumber for cosmetics in order to reduce costs, but a building finishing material such as a cloth material may be used. The thickness of the finishing material 14 is preferably, for example, about 3 mm to 30 mm, but of course, it may be made thinner than this so that it hardly functions as a burning allowance.

According to the fire-resistant wood member 100 configured as described above, the internal angles θ of the cross-sectional corners 16 of the core material 10, which are weak points in ensuring the fire-resistant performance, are all obtuse angles, and are conventional rectangular (inner angles of the cross-sectional corners). Is more gradual than in the case of (right angle), so it is less susceptible to the effects of two-sided heating. Therefore, according to the present embodiment, the fire resistance performance of the corner portion can be remarkably improved as compared with the case where the cross-sectional shape of the core material 10 is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced. Further, by using the refractory wood member 100 for a pillar or the like in the room, the openness of the room space is enhanced, and the room can be effectively utilized.

Further, by making the cross-sectional shape of the entire fire-resistant wood member 100 including the core material 10 of the finishing material 14 a circular shape or a polygonal shape of a pentagon or more similar to the cross-sectional shape of the core material 10, the cross-sectional shape of the core material 10 can be changed. The fire resistance performance of the cross-sectional corner portion 16 can be remarkably improved as compared with the case of the rectangular shape, and the degree of freedom in design can be improved.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described.
As shown in FIG. 2, the refractory wood member 200 according to the second embodiment is provided on the core material 10, the second burn stop layer 12B provided on the outside of the core material 10, and the outside of the second burn stop layer 12B. It includes a first stop layer 12A provided and a finishing material 14 provided outside the first stop layer 12A.

Also in the present embodiment, the cross-sectional shape of the core material 10 is a regular octagon as in the first embodiment, and the internal angle θ (angle) of the cross-sectional corner portion 16 is 135 ° (obtuse angle). Further, the cross-sectional shape including the core material 10, the second burn-stop layer 12B, and the first burn-stop layer 12A is also a concentric regular octagonal shape, and the cross-sectional shape of the entire refractory wood member 200 including the finishing material 14 is also a regular octagonal shape. It has a shape.

Since the core material 10 and the finishing material 14 are the same as those described in the first embodiment, detailed description thereof will be omitted. Further, the first burn-stop layer 12A and the second burn-stop layer 12B correspond to the burn-stop layer 12 described in the first embodiment.

Here, the first burn stop layer 12A and the second burn stop layer 12B are respectively configured as flat plate-like layers having the same width, and the two adjacent sides of the first burn stop layer 12A and the second burn stop layer 12B are , Is joined with an adhesive via compressed wood 18 (biscuits) provided at the corners 16 of the cross section. In addition to such a configuration, a tucker nail may be driven from the finishing material 14 into the core material 10.

The second burn-off layer 12B can be constructed by using an endothermic and heat-insulating inorganic material. The second burn-off layer 12B prevents heat transfer to the adjacent inner core material 10 in the event of a fire, even after the outer first burn-off layer 12A loses its function due to a fire. However, it has a function of not carbonizing or burning the core material 10, and exerts an effect of suppressing heat conduction to the core material 10. As the inorganic material forming the second burn-off layer 12B, a board-like material such as reinforced gypsum board, gypsum board, or calcium silicate board can be used. Further, the thickness thereof can be appropriately adjusted according to the application. The thicker the thickness, the better the effect of suppressing heat conduction. These boards may be stacked to a predetermined thickness. Here, materials such as reinforced gypsum board, gypsum board, and calcium silicate board are available at extremely low prices and have high heat insulating properties and endothermic properties, and are therefore suitable as the second burn-off layer 12B. Is.

The first burn-off layer 12A is a coating layer having fire resistance, and is provided outside the second burn-off layer 12B. In the event of a fire, the first burn-off layer 12A has a function of delaying the progress of combustion to the adjacent inner second burn-off layer 12B due to its heat insulating property, and conducts heat to the second burn-off layer 12B. It exerts a suppressive effect. As the first non-combustible layer 12A, a non-combustible material that is hard to burn, for example, non-combustible wood obtained by impregnating wood with a chemical such as boric acid and treating it with non-combustible material can be used. The thickness of the first burn-off layer 12A can be appropriately adjusted according to the intended use, but is preferably about 15 mm to 45 mm, more preferably about 30 mm, for example.

According to the fire-resistant wood member 200 configured as described above, the internal angle θ of the cross-sectional corner portion 16 of the core material 10, which is a weak point in ensuring the fire-resistant performance, is a conventional rectangle, as in the first embodiment. Since it is gentler and less susceptible to the influence of two-sided heating as compared with the case, the fire resistance performance of the corner portion can be remarkably improved as compared with the case where the cross-sectional shape of the core material 10 is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced.

In the present embodiment, the case where the second burn-off layer 12B is made of an endothermic and heat-insulating inorganic material and the first burn-off layer 12A is made of a non-combustible material has been described as an example. The composition of the material may be reversed. Further, either one of the second burn-stop layer 12B and the first burn-stop layer 12A is configured by using a material such as a refractory sheet or a refractory film that foams when it receives heat to remarkably increase its thickness and exhibits heat insulating properties. You may.

Further, in the present embodiment, the case where the burn-stop layer is composed of two layers, the first burn-stop layer 12A and the second burn-stop layer 12B, which act and function differently, has been described, but the present invention is limited to this. It may be composed of three or more non-burning layers having different actions and functions. Even in this way, it is possible to obtain the same effects as described above.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described.
As shown in FIG. 3, the refractory wood member 300 according to the third embodiment is provided on the outside of the core material 10, the second burn stop layer 12B provided on the outside of the core material 10, and the second burn stop layer 12B. It includes a first stop layer 12A provided and a finishing material 14 provided outside the first stop layer 12A.

Also in the present embodiment, the cross-sectional shape of the core material 10 is a regular octagon as in the above-described first embodiment, and the internal angle θ (angle) of each cross-sectional corner portion 16 is 135 ° (obtuse angle). be. Further, the cross-sectional shape including the core material 10, the second burn-stop layer 12B, and the first burn-stop layer 12A is also a concentric regular octagon. However, the cross-sectional shape of the entire refractory wood member 300 including the finishing material 14 is a concentric circular shape, which is different from the above-described first and second embodiments. According to the present embodiment, the cross-sectional shape of the entire refractory wood member 300 can be made into a circular shape, and the variation of the member design is widened. The cross-sectional shape of the entire refractory wood member 300 is not limited to a circular shape, but may be an elliptical shape, an oval shape, or an egg shape.

Further, in the present embodiment, a recess 20 is provided on a part of the surface of the finishing material 14, a screw 24 is driven from the recess 20 toward the core material 10, and a buried wood 22 is embedded in the recess 20 from above. A configuration that covers the head of the screw 24 is adopted. Further, tapered portions are provided at the ends of the second burn-stop layer 12B and the first burn-stop layer 12A, and they are joined so as to be incorporated with each other via the tapered portions. When the cross-sectional shape is a regular polygon, there is an advantage that the production becomes easy if the second burn-stop layer 12B and the first burn-stop layer 12A have the same shape and dimensions.

Here, the joint depth between the adjacent second stop layer 12B and the first stop layer 12A is greater than in the normal case (joint in the direction perpendicular to the outer surface of the core material 10) due to the joining of the tapered portion. Deep diagonal joints (diagonal joints not orthogonal to the outer surface of the core material 10) are formed. As for the heat-shielding performance of joints, the deeper the joint depth, the longer the heat penetration distance through the joints, and therefore the greater the heat-shielding effect. Therefore, the joint structure as shown in FIG. 3 has an advantage that the effect of delaying the temperature rise of the inner core material 10 through the joint is enhanced.

Since the core material 10, the first burn-off layer 12A and the second burn-off layer 12B, and the finishing material 14 are the same as those in the above-described first and second embodiments, detailed description thereof will be omitted.

According to the fire-resistant wood member 300 configured as described above, the internal angle θ of the cross-sectional corner portion 16 of the core material 10, which is a weak point in ensuring the fire-resistant performance, is the conventional one, as in the above-described first and second embodiments. Since it is gentler than the case of a rectangle and less susceptible to the influence of two-sided heating, the fire resistance performance of the corner portion can be remarkably improved as compared with the case where the cross-sectional shape of the core material 10 is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced.

(Modification example)
In the above-described first to third embodiments, the case where the cross-sectional shape of the core material 10 is a polygonal shape (regular octagonal shape) has been described as an example, but the present invention is not limited to this, and is a circular shape. May be good. If the cross-sectional shape of the core material 10 is circular, there is no cross-sectional corner 16 itself of the core material 10, which is a weak point in ensuring fire resistance. It can be further improved. As a result, it is possible to exert an action effect equal to or higher than that of the above-described first to third embodiments.

In this case, similarly to the above-described first to third embodiments, a burn-stop layer and a finishing material may be further provided on the outside of the core material 10, and the cross-sectional shape of the entire refractory wood member including the core material 10 is circular. , Elliptical, oval, oval or polygonal. By doing so, the degree of freedom in design can be improved.

(Verification of Action and Effect of the Present Invention)
Next, verification of the action and effect of the present invention will be described.
The present inventor conducted a two-dimensional heat conduction analysis by the finite element method to investigate the action and effect of the present invention. The analysis cases include a total of four cases when the cross-sectional shape of the core material is a regular quadrangle (corresponding to a comparative example), a regular hexagon, a regular octagon, and a regular decagon (the above are equivalent to the embodiments of the present invention). bottom. In each case, the thickness of the coating layer on the surface of the core material was set to 30 mm, the coating layer and the core material were assumed to have no moisture, and the coating layer and the core material were analyzed as not burning. The heating temperature was given according to the standard heating temperature curve of ISO834. Regarding mesh division, all were triangular meshes, and the minimum dimension was about 1 mm (side).

FIG. 4 shows the time course of the surface temperature of the corners (cross-sectional corners) of the core material obtained by this analysis. As shown in this figure, it can be seen that the surface temperature of the corners of the regular hexagon, the regular octagon, and the regular decagon corresponding to the present embodiment is lower than that of the regular quadrangle regardless of the heating time. For example, when the heating time is 60 minutes, the surface temperature of the corners of a regular quadrangle is about 650 ° C, whereas that of a regular hexagon, a regular octagon, and a regular decagon is about 580 ° C, 580 ° C, and 560 ° C, respectively. In each case, there is a gap from the case of a regular quadrangle, and it is as low as that. This is because the corners of the regular hexagon, regular octagon, and regular decagon are obtuse (120 °, 135 °, 144 °, respectively), which is gentler than that of the regular quadrangle (90 °). It is considered that the surface temperature of the corner portion becomes lower than that of the regular quadrangle as a result of being less affected by the two-sided heating and suppressing the temperature rise. Therefore, according to the present invention, the fire resistance performance of the corner portion can be remarkably improved as compared with the case where the cross-sectional shape of the core material is a regular quadrangle. In this verification, regular hexagons, regular octagons, and regular decagons were taken as examples, but the same applies to other regular polygons (for example, regular pentagons, regular heptagons, regular nonagons, regular decagons, etc.). It is thought that the result will be.

As described above, according to the fire-resistant wood member according to the present invention, the cross-sectional shape of the core material, which is a fire-resistant wood member and is made of a wood material that supports a load, is a polygonal shape of at least five angles or more. Since the angles of all the cross-sectional corners of this polygonal shape are obtuse, the angle of the cross-sectional corners of the core material, which is a weak point in ensuring fire resistance, is a conventional rectangle (the angle of the cross-sectional corners is a right angle). Since it is gentler than the case, it is less likely to be affected by two-sided heating. Therefore, according to the present invention, the fire resistance performance of the corner portion can be remarkably improved as compared with the case where the cross-sectional shape of the core material is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced. Further, by using this refractory wood member for a pillar or the like in the room, the openness of the room space is enhanced, and the room can be effectively utilized.

Further, according to the other fire-resistant wood member according to the present invention, since the burn-stop layer or the finishing material provided on the outside of the core material is further provided, the heat transfer to the core material due to the fire is suppressed by the burn-stop layer. , It has the effect of preventing carbonization and combustion of the core material. Further, the finishing material can give a wood texture to the outside of the core material.

Further, according to the other fire-resistant wood member according to the present invention, a burn-stop layer provided on the outside of the core material and a finishing material provided on the outside of the burn-stop layer are further provided. It is possible to suppress the transfer of heat to the core material, prevent carbonization and combustion of the core material, and give a wood texture to the outside of the core material by the finishing material.

Further, according to the other fire-resistant wood member according to the present invention, the entire cross-sectional shape including the burn-off layer provided on the outside of the core material or the core material of the finishing material has a circular shape, an elliptical shape, an oval shape, and an egg. Since the shape is a polygonal shape similar to the cross-sectional shape of the core material, the fire resistance performance of the corners can be remarkably improved as compared with the case where the cross-sectional shape of the core material is rectangular, and the degree of freedom in design can be improved. ..

Further, according to the other refractory wood member according to the present invention, since the cross-sectional shape of the core material which is a fire-resistant wood member and is made of a wood material that supports a load is circular, the cross-sectional shape of the core material is circular. The fire resistance can be significantly improved as compared with the case where is rectangular. Therefore, even if the member is made thinner, the structural performance equal to or higher than that of the conventional one can be ensured, and the cross section of the member can be slimmed down and the cost can be reduced. Further, by using this refractory wood member for a pillar or the like in the room, the openness of the room space is enhanced, and the room can be effectively utilized.

As described above, the refractory wood member according to the present invention is useful for use as a building structural member, and is particularly suitable for slimming the cross section of the member and thus reducing the cost.

10 Core material 12 Stop-burning layer 12A First stop-burning layer 12B Second stop-burning layer 14 Finishing material 16 Cross-sectional corner 18 Compressed wood 20 Recess 22 Buried wood 24 Screw θ Internal angle (angle)
100,200,300 refractory wood members

Claims (3)

It is a wood member with fire resistance and
A core material made of a wood material that supports a load, a second refractory layer made of an inorganic material having heat absorption and heat insulating properties as well as being provided outside the core material, and a second refractory layer provided outside the second refractory layer. It is provided with a first burn-stop layer having fire resistance and a finishing material provided on the outside of the first burn-stop layer.
Sectional shape of the core material is at least pentagonal or polygonal, the angle of all the profile angle of the polygonal obtuse, second burning blind layer provided on the outside of the core, the first burning blind layer , circular overall cross section, including the core material of the finishing material, an elliptical shape, a polygonal shape which is similar to the cross sectional shape of oval, egg-shape, or the core material,
The second burn-stop layer and the first burn-stop layer are each configured as a flat plate-like layer, and tapered portions are provided at each end of the second burn-stop layer and the first burn-stop layer, and the second burn-stop layer is provided. And the ends of the first burn-off layer are joined together via this taper so as to incorporate each other.
The fire resistance performance of the corners of the cross section is improved compared to the fire-resistant wood member whose cross-sectional shape is rectangular, and the structure equal to or higher than that of the fire-resistant wood member whose cross-sectional shape is rectangular even if the fire-resistant wood member is made thinner. A refractory wood member characterized in that its performance can be ensured. It is a wood member with fire resistance and
A core material made of a wood material that supports a load, a second refractory layer made of an inorganic material having heat absorption and heat insulating properties as well as being provided outside the core material, and a second refractory layer provided outside the second refractory layer. It is provided with a first burn-stop layer having fire resistance and a finishing material provided on the outside of the first burn-stop layer.
Sectional shape of the core material is at least pentagonal or polygonal, the angle of all the profile angle of the polygonal obtuse, second burning blind layer provided on the outside of the core, the first burning blind layer , circular overall cross section, including the core material of the finishing material, an elliptical shape, a polygonal shape which is similar to the cross sectional shape of oval, egg-shape, or the core material,
The first burn-stop layer and the second burn-stop layer are each configured as a flat plate-like layer having the same width, and the two adjacent sides of the first burn-stop layer and the second burn-stop layer are compressed provided at the corners of the cross section. It is glued together via wood and
The fire resistance performance of the corners of the cross section is improved compared to the fire-resistant wood member whose cross-sectional shape is rectangular, and the structure equal to or higher than that of the fire-resistant wood member whose cross-sectional shape is rectangular even if the fire-resistant wood member is made thinner. A refractory wood member characterized in that its performance can be ensured. The refractory wood member according to claim 1 or 2, wherein the cross-sectional shape of the core material is a regular hexagonal shape, a regular seven-sided shape, a regular octagonal shape, a regular nine-sided shape, or a regular ten-sided shape.

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