JP2017198005A - Fireproof covering structure of wooden columns - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof covering structure of a wooden column excellent in fireproof performance.
SOLUTION: A plurality of plate-shaped lightweight cellular concrete members 20 provided so as to cover the periphery of a wooden pillar 10 are fastened by a connecting means 30 such as a wood screw or a metal bolt. On the surface side of the lightweight cellular concrete member 20, a decorative board 40 may be further attached to the lightweight cellular concrete member 20 using a fixing means 41 such as a nail or a screw.
[Selection] Figure 2

Description

  The present invention relates to a fireproof covering structure using a plate-like lightweight cellular concrete member for a wooden pillar used in a wooden building.

  Several methods have been proposed for the fireproof covering structure of wooden columns. For example, as shown in FIG. 1, only one layer of platy refractory material 2 such as gypsum board is provided as a covering material around the wooden pillar 1, or the platy refractory material 2 is laminated in multiple layers. Construction to ensure fire resistance has been carried out.

  However, since the fixing material of the gypsum board is directly fixed to the wooden column, in the event of a fire, the fixing material becomes a so-called thermal bridge and transfers heat to the wooden column, which may cause a problem in fire resistance. In other words, the heat of the gypsum board heated at the time of fire is transferred to the wooden pillar through the fastening material, so that the wooden pillar body is insulated, but its fastening part is higher than the combustion start temperature. In some cases, it started to burn and the soundness of the structural member could not be maintained. In addition, the burning start temperature of the wooden pillar is lower than the fireproof temperature of the gypsum board, so even if a general fireproof coating is applied to the steel beam, the wooden pillar will burn due to heat transfer from the steel beam There is a fear.

  Furthermore, since it is necessary to laminate multiple layers of gypsum board according to the desired fireproof time, it takes time for construction, and the joint of the gypsum board to be overlaid must be shifted from the joint of the gypsum board below it. Therefore, troublesome assignment work is required. In addition, when fastening a finishing material as a decorative material to the surface of a gypsum board, it is difficult to fix the decorative material to the gypsum board, so it is necessary to penetrate the fixing material up to a wooden pillar. There may be a problem with the fire resistance of the material.

  The present invention has been made in view of the problems of the above-described conventional fireproof coating materials, and an object thereof is to provide a fireproof coating structure of a wooden column excellent in fireproof performance.

  In order to achieve the above-mentioned object, the fireproof covering structure for a wooden column according to the present invention is such that a plurality of plate-shaped lightweight cellular concrete members provided so as to cover the periphery of the wooden column are fastened by a coupling means. It is a feature.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the fireproof performance of the fireproof coating structure of a wooden pillar.

It is a perspective view of the fireproof covering structure of the conventional wooden pillar. It is a perspective view of one specific example of the fireproof covering structure of the wooden pillar which concerns on this invention. It is sectional drawing which shows one specific example of the binding method of the fireproof covering structure of the wooden pillar of this invention. It is sectional drawing which shows the other specific example of the binding method of the fireproof covering structure of the wooden pillar of this invention. It is sectional drawing which shows the example at the time of providing a decorative plate in the fireproof covering structure of FIG.

  The lightweight cellular concrete is prepared by pouring the raw material slurry into a predetermined mold, removing the mold when it has solidified into a semi-plastic state with a predetermined hardness, and then removing the semi-plastic lightweight lightweight concrete with a wire such as a piano wire. After cutting into dimensions, it can be produced by steam curing in an autoclave. The lightweight cellular concrete obtained in this way is lightweight and excellent in fire resistance, heat insulation and workability, so it is not only a building material such as a steel structure building wall, roof, floor, but also a wooden structure building. Can also be used.

  The fireproof covering structure of a wooden pillar according to a specific example of the present invention uses such a lightweight cellular concrete member as a covering material. Specifically, as shown in FIG. Is covered with four plate-like lightweight cellular concrete members (hereinafter also referred to as ALC plate members) 20. These four ALC plate members 20 are arranged such that the pair of first ALC plate members 20a facing each other with the wooden column 10 sandwiched from one direction and the wooden column 10 from a direction perpendicular to the direction between the pair of first ALC plate members 20a sandwiched. It is comprised with a pair of 2nd ALC board | plate material 20b which opposes on both sides.

  The first ALC plate 20a has the same width as the width of the wooden column 10 on the opposite side, whereas the second ALC plate 20b has the width of the wooden column on the opposite side and two It has a width equal to the total thickness of the first ALC plate material 20a. Thereby, the wooden pillar 10 and the four ALC board | plate materials 20 which cover this are the rectangles as a whole when it sees from the top. In this way, the four ALC plates 20 that cover the entire circumference of the wooden pillar 10 are combined with wood screws, ALC screws, metal bolts and nuts, etc. penetrating both ends of the second ALC plate 20b in the width direction. Tightened by means 30.

  Specifically, as shown in FIG. 3, for example, the end of the second ALC plate member 20b is made to pass through the wood screw 31 from the surface side, and the tip portion thereof is screwed to the one end surface side of the first ALC plate member 20a. Tightening of the ALC plate material 20 can be performed. Alternatively, as shown in FIG. 4, a metal bolt 32 is inserted from the surface side of the second ALC plate member 20b so as to penetrate through the first ALC plate member 20a and the two second ALC plate members 20b sandwiching the first ALC plate member 20a from both ends. The tip may be tightened by screwing with a nut 33. In any case, since the wood screw 31 and the bolt 32 as the coupling means 30 do not directly contact the wooden pillar 10, it is possible to prevent the fire resistance from being impaired by the above-described thermal bridge.

  In the fireproof covering structure of the wooden pillar of one specific example of the present invention, a fireproof material such as a cement system, a water glass system, or a resin system in which calcium carbonate is mixed in the contact surface between the both end surfaces of the first ALC sheet material 20a and the second ALC sheet material 20b. A joint agent 34 may be applied. Also, the screw holes at both ends of the second ALC plate member 20b are filled with a repair agent 35 such as a cement-based, water-glass-based, or a resin-based mixed with calcium carbonate after inserting the coupling means 30 such as wood screws. preferable. By using these fireproof joint agents and repair agents, the fireproof performance of the fireproof coating structure can be further enhanced.

  Moreover, in the fireproof covering structure of the wooden pillar of one specific example of this invention, you may cover with the decorative board 40 etc. further on the front side of the lightweight cellular concrete board | plate material 20 attached as mentioned above. Thereby, since the lightweight cellular concrete board | plate material 20 can be concealed, the designability improves. As a method for attaching the decorative board 40, for example, as shown in FIG. 5, a fixing means 41 such as a nail or a screw is passed through the decorative board 40, and the tip portion thereof is screwed and fixed to the lightweight cellular concrete plate material 20. Is preferred. Also in this case, since the nail or screw as the fixing means 41 does not directly contact the wooden pillar 10, it is possible to prevent the fire resistance from being impaired.

  As described above, the fireproof covering structure according to the present invention does not allow a connecting means such as a wood screw to come into contact with the wooden pillar when the wooden pillar is covered with a plate-shaped lightweight cellular concrete member, so that a fire may occur. In this case, it is difficult for external heat to be transmitted to the wooden pillar, and thus high fire resistance can be ensured.

DESCRIPTION OF SYMBOLS 1 Wooden pillar 2 Plate-like refractory material 10 Wooden pillar 20 Plate-shaped lightweight cellular concrete-type member (ALC board material)
20a 1st ALC plate material 20b 2nd ALC plate material 30 Coupling means 31 Wood screw 32 Metal bolt 33 Nut 34 Fireproof joint agent 35 Repair agent 40 Decorative plate 41 Fixing means

Claims (2)

  A fireproof covering structure for a wooden column, characterized in that a plurality of plate-shaped lightweight cellular concrete members provided so as to cover the periphery of the wooden column are fastened by a coupling means. The fireproof coating for a wooden column according to claim 1, wherein a decorative board provided on the surface side of the lightweight cellular concrete member is attached to the lightweight cellular concrete member using a nail or a screw. Construction.

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