JPH0781335B2 - Joint cover material and fireproof roof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint cover material for covering a joint portion of a fireproof field material in a fireproof roof laid on a steel frame base, and a fireproof roof provided with the joint cover material.

[0002]

2. Description of the Related Art Conventionally, as a fire resistant roof with a steel frame base, a fire resistant base material such as high density (bulk specific gravity of 0.6 to
(About 0.9) By laying wood wool cement board, wood piece cement board, composite board of wood wool cement board and slate board, etc., a fire resistant layer is formed on the inner layer of the roofing material to secure the required fire resistance performance. is doing. It goes without saying that the fireproof base material to be used bears a great deal of this fireproof performance, but of course the size of the fireproof base material is limited, so how to perform the joint treatment becomes a problem.

[0003]

The joint treatment of the refractory layer described above is not a problem because it is usually joined on the steel frame in the up and down direction of the roof flow, but in the left and right direction, the joint portion is directly burned to the flame. It becomes a problem because it is exposed.

Conventionally, when constructing a vertical roof, T
The fire-resistant ground material is laid using a thin-walled (0.27 mm thick) metal joint closing member called a type joiner. Since this joint closing member is thin, it expands with heat directly when exposed to a flame. And drooping (flexing) between spans, exposing joints. Therefore, there is a problem that the joint block member must be tightly sandwiched between the end portions of the refractory field material. Moreover, the fire-resistant field material must maintain its own weight and load under its own strength under heating conditions to maintain the field ground, so that it must be a hard and heavy material. in this case,
The weight of the roof structure is increased, the size and cost of each member are increased, and further, the construction cost is increased and the construction efficiency is deteriorated (long construction period), which is not preferable.

On the other hand, in the case of constructing a horizontal thatched roof, a horizontal thatched roof structure is separately constructed on the above-mentioned base for a thatched roof, or a roof plate and a ground plate as in Japanese Utility Model No. 2-130225. On the lower surface of the metal rafter that supports
A roof structure using a structure in which a heat-resistant layer and a metal cover material are arranged has been proposed. The former has various problems as already explained, while the latter causes the cover material to be exposed directly to the flame, causing it to sag (bend) due to heat. There is a problem that metal rafters are also directly exposed to flames. In order to solve this, it is necessary to make the cover material thick enough to prevent sagging due to heating or to integrally connect the rafter and the cover material at least between spans. There is a problem in terms of workability and workability.

[0006]

The present invention has been proposed in view of the above, and is a member for covering a joint portion of a refractory field material laid on a base member such as a steel frame, the side of the refractory field material being A joint cover material, characterized by being provided with a flange portion supporting the lower edge of the rim and provided with a load-bearing portion located between adjacent fire-resistant ground materials and protruding upward, and made of extruded cement or ceramics. is there.

The present invention also proposes a fireproof roof provided with the above-mentioned joint cover material.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments of the drawings.

The present invention proposes a joint cover material 3 for covering the joint portion 20 of the fire resistant field material 2 laid on the base member 1 such as a steel frame, and a fire resistant roof provided with the joint cover material 3. Is.

In the joint cover material 3 described above, the left and right ends of the flat fixing portion 31 are used as the flange portions 32 for supporting the side edge lower surfaces of the refractory field material 2, and are adjacent to the fixing portion 31 substantially in the center thereof. This is a structure in which a load bearing portion 33 that is located between the fireproof base materials 2 and 2 and projects upward is provided. The joint cover material 3 is made of extruded cement or ceramic. Incidentally, the load bearing portion 33 of the joint cover material 3 shown on the right side of FIG.
Is a mere standing piece, and the proof portion 33 ₂ of the joint cover material 3 ₂ shown on the left side of FIG. 1 is a casing having a hollow portion 34.

[0011] shown below is an example of applying a refractory roof mainly longitudinal roofing with joint cover material 3,3 ₂ described above. First,
C-shaped steel, placing the joint cover material 3,3 ₂ at a slightly greater distance than the width of the refractory roofing material 2 on the base member 1, such as H-shaped steel. The joint cover material 3,3 ₂ may be fixed with known means to regulate the position.

The fixing portion 3 of the joint cover material 3, 3 _2.
The heat expansion sheet 4 is adhered and fixed to the upper surfaces of the 1,31 ₂ or the side surfaces of the proof portions 33,33 ₂ . As the heat-expandable sheet 4, for example, a graphite-based heat-foamable material can be used. Incidentally, the thermal expansion sheet 4 may be allowed to adhere in advance to joint cover material 3,3 ₂ at the factory.

Next, the refractory field material 2 is replaced with the joint cover materials 3 and 3.
Lay in a close-fitting manner with respect to ₂ . At that time, the lower surface of the side edge of the refractory field material 2 is the flange portion 3 of the joint cover material 3, 3 _2.
2,32 ₂ . As the fireproof base material 2, a wood wool cement board, a wood piece cement board, a composite board of wood wool cement board and slate board, or the like can be used. It is not necessarily in close contact if close to the thermal expansion sheet 4 fixed to the refractory sheathing material 2 and the joint cover material 3,3 _2.

Then, a waterproof layer 5 made of asphalt roofing paper or the like is provided on the upper surface of the above-mentioned fire-resistant field material 2 as in a normal fire-resistant roof structure, and a metal roof material 6 is laid on the upper surface of the fire-resistant roof material. Make up.

In the fireproof roof thus constructed,
The flame from the indoor side does not reach above the joint portion 20. That is, since the joint cover material 3, 3 ₂ are manufactured by an extrusion cement or ceramic, has never sag (deflection) occurs in span between. Then, since the form a series of heat-resistant layer between the joint cover material 3,3 ₂ and the refractory sheathing material 2, it is possible to prevent the flames from entering the joint portion 20. Further, thermal expansion sheet 4 so close the gap between the foam expanded joint cover material 3,3 ₂ and the refractory sheathing material 2 by heat, it is possible to the above effects more made more reliable. Note that joint cover material 3,3 ₂ fixing part 3
Since the lower surfaces of 1,31 ₂ can be seen from the inside of the room, they may be painted.

Further, to use a joint cover member 3, 3 ₂ substantially is T-shaped Strength 33 ₃ provided with cross section as shown in FIG. 2 H-shaped joint cover material 3 ₃ instead of the above You can In this case, the fire resistant base material 2 ₃ is used in which the upper edge and the lower edge of the side portion are cut out and the fitting portion 21 that engages with the load bearing portion 33 ₃ of the joint cover material 3 ₃ is provided. Then, the pre-joint the cover member 3 ₃ In a factory or the like piece halves leave integrally fixed to the refractory sheathing material 2 _3, a fitting portion 21 of the refractory roofing material 2 ₃ adjacent to the time of construction of the joint cover member 3 ₃ Proof part 33 ₃
After that, the waterproof layer 5 and the roof material 6 ₂ may be installed.

The base structure of the refractory roof shown in FIGS. 1 and 2 is not limited to a vertically-roofed roof, but in the case of a normally thatched roof, the joint portion 20 is used as shown in FIG.
A metal lumber 7 is provided on the above, and a hanging member (not shown) for locking the end portion of the roofing material 6 ₃ is connected to the lumber 7.

The joint cover material 3 ₄ used here has the same schematic structure as the joint cover material 3 ₂ of FIG.

The hanging lumber 7 has side surface portions 72, 72 extending downward from the left and right side edges of the receiving surface portion 71, and further has horizontal portions 73, 73 facing outwardly at its lower edge. It is a hat-shaped metal material.

[0020] Then, load-bearing portion 33 ₄ of the joint cover material 3 ₄
To the rafters 7 fitted, then FIGS. 3 (a) in laying relatively thin refractory sheathing roof member 2 _4, and FIG. 3 (b) in a relatively refractory sheathing material 2 ₅ thick closely fitting It is laid in a shape. The refractory sheathing material 2 _5, the notching the lower surface of the side edge of the fitting portion 21 ₅ provided, it is laid the fitting portion 21 ₅ is fitted to the load-bearing unit 33 _4. Although not shown, the heat expansion sheet 4 has a gap between the joint cover material 3 ₄ and the refractory field materials 2 ₄ and ₂₅ , or a gap between the joint cover material 3 ₄ and the lumber 7.
Alternatively, it is appropriately provided in the space between the fire-resistant ground materials 2 ₄ and ₂₅ and the lumber 7. Also, securing the rafters 7 and joint covering material 3 ₄ to the base member 1 by implanting a series of bis than the horizontal portion 73 of the rafters 7.

The joint covering material 3 ₄ similarly to the refractory roof of Figure 1 described above in any of the embodiments without causing sagging, there is no possibility that rafters 7 is exposed to the flame. Then, by providing a heat-expandable sheet material 4 (not shown), flame, gas, smoke, etc. are blocked, and the fire resistance performance is further improved.

Besides, the joint cover materials 3a to 3m shown in FIGS. 4 (a) to 4 (m) can be used.

The joint cover material 3a shown in FIG.
3a is composed of two upright pieces, the joint cover material 3b of FIG. 4 (b) has an H-shaped bearing portion 33b, and the joint cover material 3c of FIG. 4 (c) has an inverted U-shaped bearing portion 33c. And Fig. 4
The load bearing portion 33d of the joint cover material 3d of (d) is a hollow casing, and the load bearing portion 33e of the joint cover material 3e of FIG. 4 (e).
Is a vertically long block shape, and the joint cover material 3 in FIG.
Strength portion 33f of f has a horizontally long block shape, it is possible both to improve the strength while suppressing likewise increase in weight and joint cover material 3 ₂ described above.

Further, the joint cover materials 3g to 3n are examples in which various functions are added. The joint cover material 3 of FIG.
The g is provided with an oblique rib 35 on the flange portion 32g to improve the pressure for supporting the refractory field material and reduce the flame flow resistance. In the joint cover material 3h of FIG. 4 (h), a hollow portion 34h is provided in the load bearing portion 33h, and the hollow portion 34h is filled with a heat insulating material 8 such as glass wool or rock wool to improve the strength and heat insulating property of the load bearing portion 33h. To do. The joint cover material 3i of FIG. 4 (i) has ribs 36 formed on the lower surface of the fixing portion 31i to reduce the heat irradiation amount per unit area of the fixing portion 31i. In the joint cover material 3j of FIG. 4 (j), a screw guide 37 is dug on the upper surface of the fixing portion 31j and the load-bearing portion 33j to fix it to the base member 1, work to fit rafters appropriately, or slingers. Improve the workability of the work to fix the member. In the joint cover material 3k of FIG. 4 (k), the reinforcing bars 33 are incorporated in the load bearing portions 33k to improve the strength. In the joint cover material 3m of FIG. 4 (m), the thermal expansion sheet 4 is embedded in advance on the upper surface of the fixing portion 31m, and the joint cover material 3n of FIG. 4 (n) is used.
Adheres the thermal expansion sheet 4 to the outer surface of the load bearing portion 33n,
All of them have good workability because it is only necessary to combine refractory field materials during construction work.

Furthermore, the fireproof roof of the present invention has the structure shown in FIG.
The hanging wood 7A-7G shown to (A)-(G) can be used.

The hanging lumber 7A, 7 shown in FIGS. 5 (A), (B)
B is a stepped engagement portion 74 on the side surface portions 72A and 72B.
A and 74B are provided. Then, as shown in FIG. 5A, a relatively thick fireproof field board 2A may be laid by cutting out the lower surface of the side edge to form the fitting portion 21A. The heat insulating material 8 was filled in the upper portion of the load bearing portion 33A of the joint cover material 3A used here.

Also, the hanging lumber 7 shown in FIGS. 5 (C) and 5 (D).
C and 7D have substantially the same shape as the load bearing portions 33C and 33D of the joint cover materials 3C and 3D, respectively, similarly to the lumber 7 of FIG. 3 described above, and have improved holding properties (allowance of mounting weight). is there. Incidentally, the load bearing portion 33C is provided with the hollow portion 34C and is relatively light in weight, the engaging portion 39 is provided at the base end thereof, and the fitting portion 75 provided on the joint cover material 3C is fitted therein.

Further, the lumber 7E of FIG. 5 (E) has a laterally long bearing portion 33E and a fixing portion 31E of the joint cover material 3E.
It is an aluminum extruded material in which a hollow square-shaped portion is provided on the upper part of the leg portion to be fitted in, and the square-shaped portion is filled with a heat insulating material 8, which has improved strength and heat insulating properties. .

Further, in FIG. 5 (F), a screw guide 37 is provided on the upper surface of the load bearing portion 33F of the joint cover material 3F, and the joint cover material 3F itself plays the role of hanging lumber and the hollow portion 34.
This is a configuration in which a metal member 9 which is a square member having substantially the same shape is inserted into F. In this case, the load bearing portion 33F is relatively lightweight and has extremely high strength.

In addition, the hanging lumber 7G shown in FIG. 5 (G) has a shape in which legs are provided on the left and right of the hollow square-shaped portion. The hung lumber 7G may be attached to the load-bearing portion 33G composed of two standing pieces of the joint cover material 3G, and the heat insulating material 8 may be provided between the leg portions.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-mentioned embodiments, and may be carried out in any manner as long as the configuration described in the claims is not changed. You can

[0032]

As described above, since the joint cover material of the present invention is made of extrusion-molded cement or ceramics, a series of heat-resistant layers are formed by the joint cover material and the refractory field material, and the The flame does not sag (bend) even between spans and prevents the flame from reaching above the joint.

Further, when the heat-expandable sheet is interposed in the joint portion, the heat-expandable sheet is heated and expanded to cause a gap between the joint cover material and the refractory field material, or a gap between the joint cover material and the lumber, Alternatively, since the gap between the refractory field material and the hanging lumber is closed, the above-mentioned effect can be further ensured.

Therefore, even if the metal lumber is provided, the influence of heat is not exerted or is remarkably reduced, so that the retention of the roof material during heating can be expected as in the case of non-heating. Conventionally, especially when the joint portion is wide, it was necessary to use the heavy fire-resistant field material for the holding force of the lumber part, but in the present invention, it is possible to use a lightweight fire-resistant field material. Therefore, the total weight of the roof structure can be significantly reduced.

Further, the joint cover material in which the hollow portion is formed in the load bearing portion and the metal member having substantially the same shape is inserted into the hollow portion can improve the strength at a relatively low cost. The strong bearing part can be used as hanging lumber.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a part of a fireproof roof of the present invention.

FIG. 2 is a vertical sectional view of a part of another refractory roof of the present invention.

FIG. 3 is a vertical cross-sectional view of a part of another refractory roof of the present invention.

FIG. 4 is a vertical sectional view showing an example of another joint cover material.

FIG. 5 is a vertical cross-sectional view showing another example of the joint cover material and the lumber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base member 2 Fireproof field material 20 Joint part 3 Joint cover material 32 Flange part 33 Strengthening part 34 Hollow part 4 Thermal expansion sheet 6 Roofing material 7 Rafter wood 9 Metal member

Claims (5)

[Claims] 1. A member for covering a joint portion of a refractory field material laid on a base member such as a steel frame, wherein a flange portion for supporting a side edge lower surface of the refractory field material is provided and adjacent fire resistant field materials are provided. A joint cover material, which is provided with a load-bearing portion which is located at, and is made of extruded cement or ceramics. 2. The joint cover material according to claim 1, wherein a hollow portion is formed in the load bearing portion, and a metal member having substantially the same shape is inserted into the hollow portion. 3. A fireproof material, wherein a fireproof field material is laid in close contact with the joint cover material according to claim 1 or 2, and a roofing material is roofed on the fireproof field material. roof. 4. The joint cover material according to claim 1 or 2 is fitted with a metal lumber on a load bearing portion of the joint cover material, and a fire resistant field material is laid, and further on the fire resistant field material. And a fire-resistant roof characterized in that roofing material is covered with rafters. 5. The refractory roof according to claim 3 or 4, wherein a heat expansion sheet is interposed in a void in a joint portion of the refractory field material.