Changing materials in the pavilion

Abstract

The objective is to provide a soffit ventilation material with a relatively simple structure that has fire resistance performance that significantly exceeds the standard of 30 minutes. [Solution] The system comprises a long main frame 2 shaped like the letter 7 in side view, a ventilation material receiving plate 3 extending horizontally from the lower part of the main frame 2, a heat shielding material 5 encased in the main frame 2, and a ventilation material 6 placed between the ventilation material receiving plate 3 and the heat shielding material 5 via a heat-expanding material 10. A ventilation opening 8 is formed in the ventilation material receiving plate 3 that allows air to escape vertically, and the tip of the ventilation material receiving plate 3 is raised to form a contact plate 9.

Description

Technical Field

[0001] The present invention relates to a soffit ventilation material, and more particularly to a soffit ventilation material having excellent fire resistance performance installed on a soffit or the like.

Background Art

[0002] In recent years, with the requirements for improving the durability of houses and the indoor thermal environment, the importance of attic ventilation has been increasing. For attic ventilation, it is conceivable to provide a ventilation opening at the eaves tip. However, providing a ventilation opening, that is, an opening at the eaves tip is subject to fire prevention regulations, and thus it cannot be carried out unless it passes a performance evaluation test (there are no regulations when providing a ventilation opening in a building).

[0003] That is, Article 109-5, Item 1, Paragraph (b) of the Ordinance for Enforcement of the Building Standards Law and Article 110, Item 1, Paragraph (b) thereof stipulate that "in the soffit of walls, floors, and roofs (excluding those effectively shielded from the attic or ceiling space by an outer wall for fire prevention purposes; the same shall apply hereinafter in this paragraph), when these are subjected to heat from an ordinary fire, the temperature of the surface other than the heated surface (limited to the surface facing the interior) shall not rise above the combustion temperature of combustibles during the time from the start of heating until the end of an ordinary fire and the specified evacuation time (in the case of the soffit of an outer wall and a roof that are non-fire-resistant walls (limited to parts other than those likely to spread fire), 30 minutes).".

[0004] The applicant of the present application has previously proposed various types of soffit (soffit) ventilation materials having fire and heat resistance performance that can be installed by anyone without using special technologies and materials as much as possible in an actual site and can also clear a performance evaluation test (Patent Document 1: Japanese Patent No. 7009185, Patent Document 2: Japanese Patent No. 7037783). The soffit ventilation material according to the proposal is entirely made of metal and has a heat expansion material attached thereto, so it also has excellent fire and heat resistance performance and can be installed at various locations of the soffit.

[0005] While these conventionally proposed soffit (underside of eaves) ventilation materials do meet the above standard of 30 minutes, this 30-minute standard is merely a minimum. Ideally, soffit (underside of eaves) ventilation materials should prevent the temperature of surfaces other than the heated surface from rising above the combustion temperature of flammable materials for a longer period of time. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 7009185 [Patent Document 2] Patent No. 7037783 [Overview of the project] [Problems that the invention aims to solve]

[0007] As mentioned above, conventionally proposed soffit (underside of eaves) ventilation materials meet the minimum standard of 30 minutes, but do not significantly exceed that standard. Therefore, the object of the present invention is to provide an underside of eaves ventilation material with a relatively simple structure that has a function that significantly exceeds the above 30-minute standard. [Means for solving the problem]

[0008] The invention described in claim 1, which solves the above problems, is an eaves ventilation material comprising a long main frame having a figure-seven shape in side view, a ventilation material receiving plate extending horizontally from the lower part of the main frame, a heat-shielding material encased in the main frame, and a ventilation material disposed between the ventilation material receiving plate and the heat-shielding material via a heat-foaming material, wherein the ventilation material receiving plate has ventilation openings that allow air to escape vertically.

[0009] In one embodiment, the tip of the ventilation material receiving plate is raised to form a contact plate.

[0010] In one embodiment, the main frame includes a front panel, a top panel, and a back panel, and the front panel, the top panel, the back panel, the ventilation material support plate, and the contact plate are formed by bending a single metal plate. In another embodiment, the main frame includes a front panel, a top panel, and a back panel, and the front panel is separated from the top panel and formed in a right-angle cross-section, with its horizontal portion overlapping and fixed to the top panel.

[0011] In one embodiment, a reinforcing plate is provided covering the area from the front panel to the top panel.

[0012] In one embodiment, the heat-shielding material has a thickness of 42 mm or more. In that case, the heat-shielding material can be made by polymerizing heat-shielding materials with a thickness of 21 mm or more. [Effects of the Invention]

[0013] As described above, the present invention has a large heat-shielding material enclosed within the main frame, and despite its relatively simple configuration, it has the effect of achieving a time of 120 minutes, far exceeding the above standard, for the temperature of surfaces other than the heated surface to reach or exceed the combustion temperature of flammable materials. [Brief explanation of the drawing]

[0014] [Figure 1] This is a perspective view of one embodiment of the soffit ventilation material according to the present invention. [Figure 2] These are side views of two embodiments of the soffit ventilation material according to the present invention. [Figure 3] These are the side views A, B, and C in Figure 2. [Figure 4] This figure shows the method for connecting soffit ventilation materials according to the present invention. [Figure 5] This is a side view (installation diagram) showing the installation method of the soffit ventilation material according to the present invention. [Figure 6] This is a partially cutaway perspective view showing the installation method for the soffit ventilation material according to the present invention. [Figure 7] This is a side view showing the installation method (waterproofing material arrangement) for the soffit ventilation material according to the present invention. [Modes for carrying out the invention]

[0015] Embodiments for carrying out the present invention will be described with reference to the attached drawings. The soffit ventilation material 1 according to the present invention consists of a long main frame 2 with a 7-shape in side view, a ventilation material receiving plate 3 extending horizontally from the lower part of the main frame 2, a heat-shielding material 5 encased in the main frame 2, and a ventilation material 6 placed between the ventilation material receiving plate 3 and the heat-shielding material 5 via a heat-expanding material 10, with ventilation openings 8 formed in the ventilation material receiving plate 3. The tip of the ventilation material receiving plate 3 is raised to form a contact plate 9. The ventilation openings 8 are, for example, formed by pushing up the middle part of two cut lines, and are formed in a series horizontally, or with a non-opening interposed in between, as shown in the example in Figure 3(A). As will be described later, through holes 16 are drilled in these non-openings.

[0016] The main frame 2 and the ventilation material support plate 3 can be formed by bending a single metal plate. Specifically, the upper end of the front plate 11 that forms the front of the main frame 2 is bent horizontally to form the top plate 12, the top plate 12 is bent vertically to form the back plate 13, the lower end of the back plate 13 is folded inward and then bent horizontally to form the ventilation material support plate 3, and the tip of the ventilation material support plate 3 is bent upward to form the contact plate 9 (Figure 2(A)). In this way, the main frame 2 can be formed by bending the front plate 11, top plate 12 and back plate 13 from a single metal plate, but the front plate 11 can also be formed by separating it from the top plate 12. In that case, the front plate 11 is formed in a right-angle cross-section and its horizontal surface is overlapped with the edge of the top plate 12 and joined (Figures 1 and 2(B)).

[0017] In one embodiment, a reinforcing plate 14 having a right-angled cross-section is covered from the front panel 11 to the top panel 12. Usually, the reinforcing plate 14 is separate from the main body frame 2, but as shown in the example of Fig. 2(A), it can also be formed by folding back the front panel 11 outward. The ventilation opening 8 is formed before performing the above-mentioned bending processes. Preferably, a plurality of fastening material through-holes 15 are formed in the top panel 12 (see Figs. 1 and 7). Further, as will be described later, in the ventilation material receiving plate 3, through-holes 16 for inserting a fastening material 20 such as a screw used when fixing the eaves ventilation material 1 to the base material 22 are formed in a non-opening portion where the ventilation opening 8 is not formed (see Fig. 3(A)).

[0018] The heat insulating material 5 is, for example, a reinforced gypsum board (JIS A 6901), occupies most of the inside of the main body frame 2, and exhibits a sufficient heat insulating effect. The heat insulating material 5 having a thickness of 42 mm or more is used, and in that case, it can be made by laminating heat insulating materials having a thickness of 21 mm or more (see Fig. 2(A)). Further, the ventilation material 6 is a hollow extruded polypropylene plate provided with a large number of ventilation paths 7 penetrating longitudinally and transversely (see Fig. 1). The heat-expandable material 10 expands when receiving heat and serves to block its installation portion to prevent the passage of flames.

[0019] The eaves ventilation material 1 according to the present invention is formed, for example, to a length of 912 mm, but can be made longer via a joining member 17 (see Fig. 4). The joining member 17 has a shape corresponding to the end face of the eaves ventilation material 1, that is, a shape corresponding to the entire back panel 13 and the ventilation material receiving plate 3, and also has a top face covering the end portion of the top panel 12. A pair of eaves ventilation materials 1 are inserted from both sides thereof and abutted at the central portion, and are appropriately screwed or the like to be connected.

[0020] The soffit ventilation material 1 according to the present invention is fastened to the lower surface of the base material 22 with fasteners 18 such as screws, with the back plate 13 in contact with the inner surface of the fascia board 21 (see Figures 5 and 6). The ventilation material receiving plate 3 is positioned on the upper side of the exterior wall 24, either directly or via a waterproofing material 23. Any building sealant (caulking material or packing material) can be used as the waterproofing material 23. In Figures 5 and 6, reference numeral 25 denotes ventilation furring strips, 26 denotes face material, 27 denotes rafters, and 28 denotes the roof.

[0021] Figure 7 shows examples of how the waterproofing material 23 is installed. Figure 7(A) shows an example where the waterproofing material 23 is placed over the entire upper surface of the exterior wall 24, and Figure 7(B) shows an example where horizontal members 30 are placed on the upper surface of the exterior wall 24 and the waterproofing material 23 is placed on the sides of the horizontal members 30. Figure 7(C) shows an example where the waterproofing material 23 is placed on the upper surface of the exterior wall 24 together with a resin backing material 31, and Figure 7(D) shows an example where the waterproofing material 23 is placed on the upper surface of the exterior wall 24 together with a metal single hat-shaped joiner 32. Figure 7(E) shows an example where the upper surface of the exterior wall 24 is left empty without any waterproofing material 23, and Figure 7(F) shows an example where a resin packing material 33 is placed on the upper surface of the exterior wall 24.

[0022] Thus, in the case of an eaves structure in which the eaves ventilation material 1 according to the present invention is installed, outside air rising along the exterior wall 24 passes through the ventilation opening 8 from the space between the fascia board 21 and the exterior wall 24, passes through the ventilation passage 7 of the ventilation material 6 from the gap between the ventilation opening 8 and the heat shielding material 5, rises through the gap between the heat shielding material 5 and the ventilation furring strips 25, and flows through the rafters 27 to the eaves.

[0023] The soffit ventilation material according to the present invention is made of steel plate or equivalent material and therefore has sufficient fire resistance, making it possible to ventilate the attic while protecting residents from the danger of fire. In particular, there is a large heat-shielding material 5 that is wider and taller than the gap between the fascia board 21 and the exterior wall 24, and heat is sufficiently shielded there, so that heat is not transmitted into the attic in the event of a fire, etc. In addition, the heat-expanding material 10 expands when heated and closes the gap between the heat-shielding material 5 and the ventilation furring strips 25, so that flames can be reliably prevented from entering.

[0024] Incidentally, the soffit ventilation material according to the present invention is the first in Japan to be confirmed to exceed the above heating time of 120 minutes and has received certification from the Minister of Land, Infrastructure, Transport and Tourism. [Industrial applicability]

[0025] As described above, the present invention has a large heat-shielding material enclosed within the main frame, and despite its relatively simple configuration, it has the effect of achieving a time of 120 minutes, far exceeding the above standard, for the temperature of surfaces other than the heating surface to reach a temperature above the combustion temperature of flammable materials. Therefore, its industrial applicability is great. [Explanation of Symbols]

[0026] 1 Soffit ventilation material 2 Main frame 3. Ventilation support plate 5 Heat shield material 6. Ventilation material 7. Ventilation channel 8. Ventilation openings 9 Contact plate 10 Heat-Foaming Material 11 Front plate 12 Top plate 13 Back plate 14 Reinforcement plate 15 Through-holes for fastening material 16 through holes 18 Fastening material 17 Joining members 20 fastening materials 21 Nose cover 22. Fascia base material 23 Waterproof material 24 Exterior wall materials 25 Ventilated furring strips 26 Surface material 27 Rafters 28 Roof

Claims

1. A soffit ventilation material comprising a long main frame shaped like the number 7 in side view, a ventilation material receiving plate extending horizontally from the lower part of the main frame, a heat-shielding material encased in the main frame, and a ventilation material placed between the ventilation material receiving plate and the heat-shielding material via a heat-expanding material, wherein the ventilation material receiving plate has ventilation openings that allow air to escape vertically.

2. The soffit ventilation material according to claim 1, wherein the tip of the ventilation material receiving plate is raised to form a contact plate.

3. The soffit ventilation material according to claim 2, wherein the main frame includes a front panel, a top panel, and a back panel, and the front panel, the top panel, the back panel, the ventilation material receiving plate, and the contact plate are formed by bending a single metal plate.

4. The soffit ventilation material according to claim 2, wherein the main frame includes a front panel, a top panel, and a back panel, the front panel is separated from the top panel and formed in a right-angle cross-section, and its horizontal portion is superimposed and fixed to the top panel.

5. The soffit ventilation material according to claim 3 or 4, wherein a reinforcing plate is covered from the front plate to the top plate.

6. The soffit ventilation material according to claim 1, wherein the heat-shielding material has a thickness of 42 mm or more.

7. The soffit ventilation material according to claim 6, wherein the heat-shielding material is formed by polymerizing a heat-shielding material with a thickness of 21 mm or more.

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