JP7369250B1 - Wooden fireproof covering surface material - Google Patents

Abstract

An object of the present invention is to form a wooden fireproof covering surface material using a wooden component having a plurality of pieces of wood glued together with a thermoplastic resin, while suppressing the falling off of the wooden component. [Solution] A wooden fireproof coating surface material 30, comprising a plurality of wooden constituent materials 40 arranged in the width direction of the wooden fireproof coating surface material 30 and bonded with a thermosetting resin R1, the wooden constituent materials 40 includes a plurality of pieces of wood 42 that are laminated in the thickness direction of the wood fireproof covering surface material 30 and bonded together using thermoplastic resin. [Selection diagram] Figure 2

Description

TECHNICAL FIELD The present invention relates to a wood fireproof covering surface material.

BACKGROUND ART Fireproof coating materials (fireproof coating surface materials) are known that are made of wood and cover steel members such as H-shaped steel (for example, see Patent Documents 1 and 2).

Japanese Patent Application Publication No. 02-058651 Japanese Patent Application Publication No. 2013-011063

By the way, it is conceivable to form a fireproof covering surface material using scraps or scraps of laminated wood or CLT (Cross Laminated Timber).

However, thermoplastic resins are sometimes used as adhesives for these end materials and waste materials. In this case, in the event of a fire, the thermoplastic resin softens, so the adhesive strength is likely to decrease, and scraps and the like may fall off early.

The present invention takes the above-mentioned facts into account, and aims to suppress the falling off of the wooden constituent materials while forming a wooden fireproof covering surface material using a wooden constituent material having a plurality of pieces of wood glued together with a thermoplastic resin. .

The wood fireproof covering surface material according to claim 1 includes a plurality of wood constituent members arranged in the width direction of the wood fireproof covering material and bonded with a thermosetting resin, and the wood constituent materials are: A plurality of pieces of wood are laminated in the thickness direction of the wood fireproof covering surface material and are bonded together using a thermoplastic resin.

According to the wooden fireproof covering surface material according to the first aspect, a plurality of wooden constituent members are provided. The plurality of wooden components are arranged in the width direction of the wooden fireproof covering surface material and are bonded together using a thermosetting resin. Moreover, each wooden component includes a plurality of pieces of wood that are laminated in the thickness direction of the wooden fireproof covering surface material and are bonded together using a thermoplastic resin.

Here, as described above, the wood components adjacent in the width direction of the wood fireproof covering surface material are bonded together with a thermosetting resin. That is, in the present invention, the pieces of wood of the wood components that are adjacent to each other in the width direction of the wood fireproof covering surface material are bonded together using a thermosetting resin that does not easily lose its adhesive strength in the event of a fire.

As a result, even if the thermoplastic resin of the wooden constituent material softens in the event of a fire, and the adhesion force between adjacent timbers in the thickness direction of the wooden fireproof covering face material decreases, the timbers are prevented from falling off.

As described above, in the present invention, it is possible to form a wooden fireproof covering surface material using a wooden component having a plurality of pieces of wood bonded together with a thermoplastic resin, and to prevent the wooden component from falling off. Therefore, it is possible to effectively utilize (recycle) laminated materials such as CLT bonded with thermoplastic resin, and their offcuts and waste materials.

The wood fireproof covering surface material according to claim 2 is the wood fireproof covering surface material according to claim 1, which includes a metal plate stacked over the inner surface of the adjacent wood component materials, and a metal plate on the wood component materials. Equipped with screws for fixing the board.

According to the wooden fireproof covering surface material according to claim 2, the metal plates are stacked over the inner surfaces of adjacent wooden constituent materials. Further, the metal plate is fixed to the wooden component with screws.

As a result, for example, in the event of a fire, fire heat input to one wood component is transmitted to other adjacent wood components via the metal plate. Therefore, since the temperature rise of the first wooden component is suppressed, the falling off of the wooden component is suppressed.

Furthermore, even if the wooden components fall off in the event of a fire, the metal plate will block the flames. Therefore, fire resistance performance is improved.

A third aspect of the present invention provides a wooden fireproof covering surface material according to the second aspect, in which the screws reach the wood constituting the outermost layer of the wooden constituent material.

According to the wooden fireproof covering surface material according to claim 3, the screws reach the wood constituting the outermost layer of the wooden component. As a result, even if the thermoplastic resin of the wood component softens and the adhesive strength decreases in the event of a fire, the wood constituting the outermost layer of the wood component is further suppressed from falling off.

The wooden fireproof covering surface material according to claim 4 is the wooden fireproof covering surface material according to any one of claims 1 to 3, wherein the wooden constituent material is laminated wood or orthogonal laminated board. .

According to the wooden fireproof covering surface material according to claim 4, the wooden constituent material is laminated wood or orthogonal laminated board. Thereby, it is possible to effectively utilize laminated wood, scraps and scraps of orthogonal laminated boards.

As described above, according to the present invention, it is possible to form a wooden fireproof covering surface material using a wooden component having a plurality of pieces of wood glued together with a thermoplastic resin, and to suppress the falling of the wooden component.

FIG. 2 is a plan cross-sectional view showing a steel column coated with a fireproof coating using a wooden fireproof covering panel according to an embodiment. 2 is a partially enlarged sectional view of FIG. 1. FIG. FIG. 3 is a sectional view corresponding to FIG. 2 showing a wooden fireproof covering surface material according to a comparative example. FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing a modification of the wooden fireproof covering surface material according to one embodiment. FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing a modification of the wooden fireproof covering surface material according to one embodiment. FIG. 7 is a plan cross-sectional view showing a corner of a steel column coated with a fireproof coating using a modified example of the wooden fireproof coating surface material according to an embodiment.

Hereinafter, a wooden fireproof covering surface material according to an embodiment will be described with reference to the drawings. Note that the arrow X direction and the arrow Y direction appropriately shown in each figure indicate two horizontal directions orthogonal to each other.

(steel column)
FIG. 1 shows a steel column 10 coated with fireproof coating by a wooden fireproof coating face material 30 according to this embodiment. The steel column 10 is formed of a square steel pipe, for example.

Note that the steel column 10 is not limited to a rectangular steel pipe, and may be, for example, a round steel pipe, an H-shaped steel, a CFT column in which a steel pipe is filled with concrete, or the like. Moreover, the steel column 10 is an example of a steel frame member.

A plurality of (four in this embodiment) base materials 20 are arranged around the steel column 10. The plurality of base materials 20 are formed of, for example, L-shaped steel, and are arranged on the outside of each corner of the steel column 10.

The plural base materials 20 are arranged along the material axis direction of the steel column 10 and extend from the column base to the column head of the steel column 10. The upper and lower ends of each base material 20 are supported by, for example, runners (not shown) or the like. A wooden fireproof covering surface material 30 is supported on these base materials 20.

Note that the wooden fireproof covering surface material 30 is not limited to the base material 20, and may be supported by, for example, a bracket attached to the outer surface of the steel column 10.

(Wood fireproof covering surface material)
A plurality of (four in this embodiment) wooden fireproof covering face materials 30 are arranged so as to surround the steel column 10. More specifically, the plurality of wooden fireproof coating face materials 30 are arranged in a rectangular frame shape surrounding the steel frame column 10 when viewed from the material axis direction of the steel frame column 10, and provide fireproof coating to the steel frame column 10. .

The wooden fireproof covering surface material 30 functions as a fireproof covering material. Specifically, the wood fireproof covering surface material 30 functions as a burnt layer that provides a fireproof covering to the steel column 10. The burnt layer is a layer that suppresses the infiltration of fire heat into the steel column 10 side by burning during a fire and forming a carbonized layer (insulating layer).

The board thickness (thickness) t (see FIG. 2) of the wooden fireproof covering surface material 30 is appropriately set according to the required fireproof performance. Here, in the case of one side heating of wood (wood material), 40 mm to 60 mm is carbonized by heating for 1 hour, 70 mm to 90 mm by heating for 2 hours, and 100 mm to 120 mm by heating for 3 hours. Therefore, in the case of one-sided heating, the plate thickness t of the wooden fireproof coating surface material 30 is set to, for example, 40 mm to 60 mm for 1 hour heating, 70 mm to 90 mm for 2 hours heating, and 100 mm to 120 mm for 3 hours heating.

Furthermore, when wood (wooden material) is heated on two sides, an allowance of 10% to 20% is required in the board thickness. Therefore, the plate thickness t) of the wood fireproof coating surface material 30 is set to 44 mm to 72 mm when heated for 1 hour, 77 mm to 108 mm when heated for 2 hours, and 110 mm to 144 mm when heated for 3 hours.

Further, examples of the tree species (wood) used for the wooden fireproof covering surface material 30 include larch, Douglas fir, and cedar. Here, depending on the tree species, the combustion state of the outer surface (locating surface) 30A of the wooden fireproof covering surface material 30 may differ after heating. For example, in the case of cedar, combustion is likely to continue over the entire outer surface 30A of the wood fireproof covering surface material 30.

On the other hand, in the case of larch and Douglas fir, combustion continues partially on the outer surface 30A of the wood fireproof covering surface material 30, but as a whole it is easy to stop burning. Therefore, as the tree species (wood) used for the wooden fireproof covering surface material 30, larch and Douglas fir are preferable.

Note that the steel column 10 has high thermal conductivity. Therefore, in the event of a fire, even if combustion continues partially on the outer surface 30A of the wooden fireproof coating 30, the heat of the fire is diffused throughout the steel column 10, so the local temperature rise of the steel column 10 is suppressed. Ru.

Therefore, even if larch or Douglas fir is used for the wooden fireproof covering material 30 and combustion continues partially on the outer surface 30A of the wooden fireproof covering material 30 in the event of a fire, the fireproof performance of the steel column 10 is guaranteed.

When viewed from the axial direction of the steel column 10, adjacent wooden fireproof covering face materials 30 are arranged along directions (arrow X direction, arrow Y direction) that are substantially orthogonal to each other. Further, the adjacent wooden fireproof covering face materials 30 are arranged with their respective ends abutted against each other, and a joint M is formed between the ends.

A metal plate 50 is attached to the inner surface (back surface) 30B of the wooden fireproof covering surface material 30. The metal plate 50 as a heat insulating layer is made of a steel plate, iron plate, or the like having high thermal conductivity. This metal plate 50 is fixed to the wooden fireproof covering surface material 30 with a plurality of screws 52 in a state where it is stacked on the inner surface 30B of the wooden fireproof covering surface material 30.

In addition, the wooden fireproof covering surface material 30 and the metal plate 50 may be integrated into a unit in advance. Further, the metal plate 50 may be provided as necessary, and can be omitted as appropriate.

The metal plate 50 and the wood fireproof covering surface material 30 are arranged across adjacent base materials 20. The metal plate 50 and the wooden fireproof covering material 30 are fixed to the base material 20 from the surface (outer surface) side of the wooden fireproof covering material 30 by screws or the like (not shown). In addition, the metal plate 50 is not arranged at the joint M of the adjacent wooden fireproof covering surface materials 30.

The inner surface of the metal plate 50 is arranged to face the outer surface (outer surface) of the steel column 10. In other words, the wooden fireproof covering surface material 30 is arranged with a space between the inner surface of the metal plate 50 and the outer surface of the steel column 10. This interval functions as a heat insulating layer (insulating space).

Furthermore, by leaving a space between the inner surface of the metal plate 50 and the outer surface of the steel column 10, interference between irregularities such as weld beads formed on the outer surface of the steel column 10 and the wooden fireproof covering surface material 30 is suppressed. At the same time, the spacing makes it possible to absorb construction errors and the like of the wooden fireproof covering surface material 30.

Here, as shown in FIG. 2, the wooden fireproof covering surface material 30 includes a plurality of wooden constituent members 40 arranged in the width direction (arrow X direction). Adjacent wooden components 40 are arranged with their respective side surfaces 40S facing each other, and their respective side surfaces 40S are bonded (pressed) together with thermosetting resin R1.

The wooden component 40 is made of laminated wood bonded with thermoplastic resin R2. Further, the wooden component 40 is formed of, for example, scraps of laminated wood or waste wood. Each wooden component 40 has a plurality of pieces of wood 42 laminated in the thickness direction (direction of arrow Y) of the wooden fireproof covering surface material 30.

The plurality of pieces of wood 42 are made into a lamina of laminated wood, and are laminated in three or more layers. Further, the plurality of pieces of wood 42 have a rectangular cross section, and are stacked with their respective fiber directions (longitudinal directions) in the same direction. Adjacent pieces of wood 42 are arranged with their respective thickness-direction surfaces (board surfaces or rectangular surfaces) 42A butted against each other, and the respective surfaces 42A are bonded (pressed) together with thermoplastic resin R2. .

In addition, in this embodiment, the wooden component 40 having four layers of wood 42 and the wooden component 40 having five layers of wood 42 are used, as an example. Furthermore, the wooden component material 40 is not limited to scraps or scrap wood, and may be, for example, sawn lumber.

The metal plates 50 are stacked over the inner surfaces of the adjacent wooden components 40. This metal plate 50 is fixed to the wooden component 40 with a plurality of screws 52. The plurality of screws 52 are arranged at intervals in the width direction of the wooden fireproof covering surface material 30 and at intervals in the axial direction of the steel column 10. Each screw 52 is fixed to the wood 42 on the inner layer side of the wooden component 40, for example.

(effect)
Next, the operation of this embodiment will be explained.

As shown in FIG. 2, the wooden fireproof covering surface material 30 includes a plurality of wooden constituent members 40. The plurality of wooden components 40 are arranged in the width direction of the wooden fireproof covering surface material 30, and are bonded with thermosetting resin R1 with their side surfaces 40S abutting each other.

Each wooden component 40 has a plurality of pieces of wood 42 laminated in the thickness direction of the wooden fireproof covering surface material 30. Further, the plurality of pieces of wood 42 are bonded together using thermoplastic resin R2, with their surfaces 42A abutting each other.

Here, FIG. 3 shows a wooden fireproof covering surface material 100 according to a comparative example. The wooden fireproof covering surface material 100 according to the comparative example differs from the wooden fireproof covering surface material 30 according to the present embodiment in that adjacent wooden constituent members 40 are bonded together with thermoplastic resin R2.

Therefore, in the wooden fireproof covering surface material 100 according to the comparative example, when the thermoplastic resin R2 softens and the adhesive strength decreases in the event of a fire, the wood 4 of the wooden component 40 softens and the adhesive strength decreases, as shown by the two-dot chain line in FIG. may fall off early.

On the other hand, in this embodiment, as described above, the wood components 40 adjacent in the width direction of the wood fireproof covering surface material 30 are bonded together with the thermosetting resin R1. That is, in this embodiment, the wood pieces 42 of the wood components 40 that are adjacent to each other in the width direction of the wood fireproof covering surface material 30 are bonded together using the thermosetting resin R1, which does not easily lose its adhesive strength in the event of a fire.

As a result, even if the thermoplastic resin R2 of the wooden constituent material 40 softens in the event of a fire, and the adhesive strength of the timbers 42 adjacent to each other in the thickness direction of the wooden fireproof covering surface material 30 decreases, the falling of the timbers 42 is suppressed. Ru.

In this manner, in this embodiment, the wooden fireproof covering surface material 30 can be formed by the wooden constituent material 40 having a plurality of pieces of wood 42 bonded by the thermoplastic resin R2, and the falling off of the wooden constituent material 40 can be suppressed. . Therefore, it is possible to effectively utilize (recycle) laminated materials such as CLT bonded with the thermoplastic resin R2, as well as their offcuts and waste materials.

Further, a metal plate 50 is attached to the inner surface 30B of the wooden fireproof covering surface material 30. The metal plates 50 are stacked over the inner surfaces of the adjacent wooden components 40. Further, the metal plate 50 is fixed to the wooden component 40 with a plurality of screws 52.

As a result, for example, in the event of a fire, fire heat input to one wood component 40 is transmitted to other adjacent wood components 40 via the metal plate 50. Therefore, since the temperature rise of one wooden component 40 is suppressed, the falling off of the wooden component 40 is suppressed.

Further, the wood 42 on the inner layer side of the wooden component 40 is supported by the base material 20 via screws 52 and metal plates 50. Therefore, falling off of the wood 42 on the inner layer side of the wood component 40 is suppressed.

Further, even if the wood 42 on the inner layer side of the wooden component 40 falls off in the event of a fire, the metal plate 50 blocks the flames. Therefore, the fire resistance performance of the steel column 10 is improved.

(Modified example)
Next, a modification of the above embodiment will be described.

In the embodiment described above, the screws 52 that fix the metal plate 50 are fixed to the wood 42 on the inner layer side of the wooden component 40. However, for example, as in the modification shown in FIG. 4, the screws 54 may be fixed to the wooden component 40 so as to reach the wood 42 that constitutes the outermost layer of the wooden component 40.

As a result, even if the thermoplastic resin R2 of the wooden component 40 softens and the adhesive strength decreases in the event of a fire, the wood 42 constituting the outermost layer of the wooden component 40 is supported by the screws 54, so the wood 42 is further suppressed from falling off.

Further, in the above embodiment, the wooden component 40 is formed of laminated wood. However, the wooden component 60 may also be formed of a cross-laminated board (CLT), for example, as in the modification shown in FIG.

The wooden constituent materials 60 are arranged in the width direction of the wooden fireproof covering surface material 30, and are arranged with their respective side surfaces 60S facing each other, and each side surface 60S is bonded (crimped) with a thermosetting resin R1. ) has been done.

Each wooden component 60 has a plurality of pieces of wood (lamina) 62 and 64 laminated in the thickness direction. The plurality of pieces of wood 62 and 64 are stacked such that their fiber directions intersect (substantially orthogonally) with each other. Further, the plurality of pieces of wood 62 and 64 are bonded together using thermoplastic resin R2, with their surfaces in the thickness direction abutting each other.

Here, in the wooden component 60, for example, the screws 54 are fixed so as to reach the wood 62 extending in the width direction (direction of arrow X) of the wooden fireproof covering surface material 30. As a result, the plurality of pieces of wood 64 on the inner layer side of the piece of wood 62 are restrained by the piece of wood 62 . Therefore, it is possible to reduce the number of screws 54 and to prevent the plurality of pieces of wood 64 from falling off.

In addition, as in the modification shown in FIG. 6, at the corners of adjacent wooden fireproof covering panels 30, the end surfaces 30K of one of the wood fireproof covering panels 30 are exposed, so in the event of a fire, the end surfaces 30K of the wood fireproof covering panels 30 are exposed. heated. Therefore, the thermoplastic resin R2 of the wood component 40 constituting the butt end surface 30K is softened over the entire layer, and the adhesive force is reduced. As a result, there is a possibility that the plurality of pieces of wood 42 forming the end face 30K of one of the wood fireproof covering face materials 30 may fall off at an early stage over the entire layer.

As a countermeasure against this, in the modified example shown in FIG. 6, screws 56 are provided in the wooden component 40 that constitutes the end (end surface 30K) of one of the wooden fireproof covering panels 30. The screw 56 is screwed into the wooden component 40 from the inner surface of the wooden component 40, and reaches the wood 42 that constitutes the outermost layer of the wooden component 40.

In addition, the screws 56 are inserted, for example, within the joint M of the adjacent wooden fireproof covering panels 30 (within the thickness of the other wooden fireproof covering panel 30) and from the end surface 30K of one of the wooden fireproof covering panels 30. , for example, is arranged 30 mm or more inside. The screws 56 can prevent the plurality of pieces of wood 42 forming the end (end surface 30K) of one of the wooden fireproof covering face materials 30 from falling off.

Further, in the above embodiment, the steel frame member is the steel column 10. However, the steel members are not limited to steel columns, and may also be steel beams. In this case, the steel beam is covered with fireproof wood by the wood fireproof covering surface material.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and the embodiment and various modifications may be appropriately combined and used. It goes without saying that the invention can be implemented in various ways without departing from the scope.

30 Wooden fireproof coating surface material 30B Inner surface 40 Wooden component 42 Wood 50 Metal plate 52 Screw 54 Screw 60 Wooden component 62 Wood 64 Wood R1 Thermosetting resin R2 Thermoplastic resin

Claims (4)

A wooden fireproof covering surface material,
A plurality of wooden constituent members arranged in the width direction of the wooden fireproof covering surface material and bonded with a thermosetting resin,
The wood constituent material includes a plurality of pieces of wood that are laminated in the thickness direction of the wood fireproof covering surface material and are bonded together using a thermoplastic resin.
Wooden fireproof covering surface material. a metal plate stacked over the inner surfaces of the adjacent wood components;
a screw for fixing the metal plate to the wood component;
The wooden fireproof covering surface material according to claim 1, comprising: The screw reaches the wood constituting the outermost layer of the wood component,
The wooden fireproof covering surface material according to claim 2. The wooden constituent material is laminated wood or orthogonal laminated board,
The wooden fireproof covering surface material according to any one of claims 1 to 3.