Ventilation sleeve

Abstract

To provide a ventilation sleeve capable of efficiently ventilating an attic space.SOLUTION: A ventilation sleeve (5) is disposed in a through hole (24) that penetrates a beam (2) that divides the ceiling space of a building. The ventilation sleeve (5) is disposed in the through hole (24) and includes a cylindrical tubular fire-resistant covering material (50) that penetrates the through hole (24), and a cylindrical core member (60) that is disposed on the inner peripheral surface of the tubular fire-resistant covering material (50). The core member (60) includes an inner region (61) that abuts against the tubular fire-resistant covering material (50) and an outer region (62) that extends in both directions from the inner region (61) and does not abut against the tubular fire-resistant covering material (50).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a ventilation sleeve, and more particularly to a ventilation sleeve to be placed in a through hole passing through a beam that separates the ceiling space of a building. [Background technology]

[0002] Generally, when ventilating the attic in buildings such as flat-roofed detached houses or apartment buildings, there is no space above or below the beams to create a ventilation path, so through holes are made in the beams to ensure a ventilation path between the beam sections.

[0003] Furthermore, if the building is fire-resistant, it is necessary to cover the beams with a fire-resistant covering material and to cover the through-holes of the beams with a fire-resistant covering material. For example, Patent Document 1 (JP Patent Publication 2007-198029 A) is known as a disclosure of such a technique. Patent Document 1 discloses a technique for covering the beams with a fire-resistant covering material and for covering the through-holes of the beams with a fire-resistant covering material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-198029 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned Patent Document 1, when covering the inner peripheral surface of the through hole of the beam with a fire-resistant covering material, the fire-resistant covering material is rolled and inserted into the through hole. However, since the fire-resistant covering material is made of a fibrous material, there is a large variation in the material, and it may not be possible to ensure a predetermined inner diameter.

[0006] In addition, in general, attic insulation is attached to the back surface of the ceiling board in the attic space of a building. The attic insulation is placed between each section of the beams, and there is a risk that it will cover the opening of the fireproof covering material placed in the through hole of the beam.

[0007] The present invention has been made to solve the above-mentioned problems, and its object is to provide a ventilation sleeve that can efficiently ventilate the attic space. [Means for solving the problem]

[0008] A ventilation sleeve according to one aspect of the present invention is a ventilation sleeve that is placed in a through hole that penetrates a beam that separates the attic space of a building, and comprises a cylindrical tubular fire-resistant covering material that is placed within the through hole and passes through the through hole, and a cylindrical core member that is placed on the inner surface of the tubular fire-resistant covering material, and the core member includes an inner region that abuts the tubular fire-resistant covering material, and an outer region that extends axially from the inner region on both sides and does not abut the tubular fire-resistant covering material.

[0009] Preferably, the outer region is provided with an opening that opens upward.

[0010] Preferably, a plurality of openings are provided.

[0011] Preferably, the core member has a plate shape when removed from the inner peripheral surface of the tubular fire-resistant covering material.

[0012] Preferably, the core member includes an insertion portion provided at one end and a receiving portion provided at the other end remote from the one end for receiving the insertion portion, and is formed into a cylindrical shape by inserting the insertion portion into the receiving portion.

[0013] Preferably, a horizontal brace is provided in the attic space connecting the beams, and the horizontal brace passes through the opening. Effect of the Invention

[0014] According to the present invention, ventilation of the attic space can be efficiently performed. [Brief description of the drawings]

[0015] [Figure 1]1 is a perspective view showing a state in which a ventilation sleeve according to a first embodiment of the present invention is placed in an attic space. FIG. [Diagram 2] 1 is a cross-sectional view showing a state in which a ventilation sleeve according to a first embodiment of the present invention is placed in an attic space. [Diagram 3] FIG. [Figure 4] 1 is an explanatory diagram showing a method of installing a ventilation sleeve. [Diagram 5] FIG. 13 is a plan view showing a modified example of the core member. [Figure 6] FIG. 11 is a plan view showing another modified example of the core member. [Figure 7] FIG. 1 is a cross-sectional view illustrating a conventional ventilation sleeve. [Figure 8] 6 is a cross-sectional view showing a state in which a ventilation sleeve according to a second embodiment of the present invention is placed in an attic space. FIG. [Figure 9] FIG. [Figure 10] 11 is a perspective view showing a state in which a ventilation sleeve according to a second embodiment of the present invention is placed in an attic space. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and their description will not be repeated.

[0017] <Outline configuration> Before describing the ventilation sleeve of this embodiment, the structure of the attic space 1 of a building will be described. Fig. 1 is a perspective view showing the ventilation sleeve of this embodiment arranged in the attic space, and Fig. 2 is a cross-sectional view thereof. Note that Fig. 1 omits illustration of a ceiling portion 12 and a heat insulating material 3 located on the ceiling portion 12. Also, the left-right direction of the arrow A in Fig. 2 indicates the axial direction.

[0018] The building in which the ventilation sleeve 5 is arranged in the attic space 1 is, for example, a detached house or an apartment building, and has a flat roof. As shown in particular in FIG. 2, the attic space 1 is located between a roof section 11 and a ceiling section 12. In the attic space 1, a roof structure (floor structure) is formed by beams 2, and the space is divided into a plurality of areas. An insulating material 3 made of a fiber material such as glass wool or rock wool is located on the ceiling section 12. Specifically, the insulating material 3 is spread in a lower position within the area divided by the beams 2.

[0019] The beam 2 is, for example, an H-shaped steel or an I-shaped steel, and includes an upper flange 21, a lower flange 22, and a web plate 23 that vertically connects the upper flange 21 and the lower flange 22. The upper flange 21 supports the roof portion 11 from below. The lower flange 22 is supported by the ceiling portion 12 from below.

[0020] As shown in Fig. 2, a circular beam through hole 24 is provided in the web plate 23 of the beam 2. Although not shown, a plurality of beam through holes 24 are provided at intervals along the longitudinal direction of the web plate 23. These beam through holes 24 are provided to form a ventilation path for the attic space 1. A ventilation sleeve 5 is positioned inside the beam through hole 24. The ventilation sleeve 5 will be described later.

[0021] The beam 2 is fire-resistant and covered with a fire-resistant covering material 4. The fire-resistant covering material 4 is plate-shaped, and covers the lower and both sides of the beam 2 and is fixed to the roof portion 11 with pins (not shown) to form a box shape. Hereinafter, the fire-resistant covering material 4 will be referred to as a box-shaped fire-resistant covering material. The box-shaped fire-resistant covering material 4 is in contact with the lower flange 22 of the beam 2, but is not in contact with the web board 23. Therefore, a space is provided between the web board 23 of the box-shaped fire-resistant covering material 4 and the insulation material 3. Note that the shape of the box-shaped fire-resistant covering material 4 is not limited to this, and may be attached along the shape of the beam 2, for example.

[0022] The box-shaped fire-resistant covering material 4 is formed of, for example, rock wool, which is a fiber-based material. Specifically, the box-shaped fire-resistant covering material 4 is formed by adhering a surface decorative material to heat-resistant rock wool molded into a felt-like shape. The box-shaped fire-resistant covering material 4 is provided with a hole portion 44 of the same size as the beam through hole 24 at a position corresponding to the beam through hole 24 of the beam 2. As a result, the ventilation sleeve 5 described later has a shape that penetrates the beam through hole 24 and the hole portion 44.

[0023] <Embodiment 1> (Ventilation sleeve configuration) The ventilation sleeve 5 of the first embodiment will be described with further reference to Figure 3. Figure 3 is a plan view showing the core member.

[0024] As shown in Figures 1 and 2, the ventilation sleeve 5 is arranged within the beam through hole 24 of the beam 2 and the hole portion 44 of the box-shaped fire-resistant covering material 4, and comprises a cylindrical tubular fire-resistant covering material 50 that penetrates the beam through hole 24 and the hole portion 44, and a cylindrical core member 60 that is arranged on the inner surface of the tubular fire-resistant covering material 50.

[0025] The tubular fireproof covering material 50 is made of the same material as the box-shaped fireproof covering material 4 described above. That is, the tubular fireproof covering material 50 is made of, for example, rock wool, which is a fiber-based material, and is formed by adhering a surface decorative material to heat-resistant rock wool molded into a felt shape. The outer circumferential surface of the tubular fireproof covering material 50 abuts against the inner circumferential surface of the beam through hole 24 of the beam 2 and the inner circumferential surface of the hole portion 44 of the box-shaped fireproof covering material 4. Both ends of the tubular fireproof covering material 50 penetrate the hole portion 44 of the box-shaped fireproof covering material 4 and protrude from the side wall surface of the tubular fireproof covering material 50. In addition, the tubular fireproof covering material 50 is a member molded into a cylindrical shape and has a cylindrical opening portion 54 extending in the axial direction. A core member 60 is disposed in the cylindrical opening portion 54.

[0026] 2, the core member 60 has an axial length longer than the tubular fire-resistant covering material 50, and both ends thereof protrude from both ends of the tubular fire-resistant covering material 50. Specifically, the core member 60 includes an inner region 61 that abuts against the tubular fire-resistant covering material 50, and an outer region 62 that extends in both directions from the inner region 61 and does not abut against the tubular fire-resistant covering material 50.

[0027] 3, the width of the inner region 61 may be substantially the same as that of the tubular fireproof covering material 50, for example, 200 mm or more and 300 mm or less. The width of the outer region 62 is smaller than that of the inner region 61. Specifically, the width of the outer region 62 may be half or less of the width of the inner region 61, and is 20 mm or more and 100 mm or less, and preferably 40 mm or more and 70 mm or less. If it is less than 20 mm, the strength of the outer region 62 cannot be ensured, and the area of ​​the peripheral opening 64 (FIG. 2) described later becomes small, resulting in a small amount of ventilation. If it exceeds 100 mm, the protruding dimension from the tubular fireproof covering material 50 becomes too large, and the outer region 62 may bend.

[0028] The outer regions 62 are provided at both ends of the inner region 61, and have openings 64 on their outer peripheral surfaces. The outer peripheral openings 64 are provided at positions 10 mm to 50 mm, specifically 25 mm to 35 mm, from both outer edges. This allows the strength of the outer region 62 to be maintained. As shown in FIG. 2, the outer peripheral openings 64 open upward and to the sides, but may open all around. The opening area of ​​the outer peripheral openings 64 is preferably approximately the same as or slightly larger than the opening area of ​​the end openings 63 provided at the axial ends of the core member 60.

[0029] The core member 60 is made of a flexible material, such as polypropylene (PP). The thickness of the core member 60 is preferably 0.3 mm to 0.5 mm. The core member 60 preferably has restoring properties due to the material, thickness, etc.

[0030] The core member 60 has a cylindrical shape when inserted into the tubular fire-resistant covering material 50, but as shown in FIG. 3, when removed from the tubular fire-resistant covering material 50, it has a plate shape.

[0031] Specifically, the core member 60 has a rectangular shape in a plan view. The peripheral opening 64 has a rectangular shape extending along the up-down direction of the core member 60. The up-down length of the peripheral opening 64 is preferably at least half the up-down length of the core member 60. The core member 60 includes an insertion portion 65 provided at one end (upper part on the paper) and a receiving portion 66 provided at the other end (lower part on the paper) separated from the one end.

[0032] The insertion portions 65 are provided above the outer peripheral openings 64. The insertion portions 65 are shaped to protrude upward from the upper edge of the core member 60. The receiving portions 66 are provided below the outer peripheral openings 64. The receiving portions 66 are rectangular in plan view, but may be cut-out portions as long as the insertion portions 65 can be inserted. The insertion portions 65 maintain their cylindrical shape by being inserted into the receiving portions 66.

[0033] (How to install the ventilation sleeve) A method of installing the ventilation sleeve 5 of this embodiment will be described with reference to Fig. 4. Fig. 4 is a diagram showing the installation process of the ventilation sleeve.

[0034] First, as shown in Fig. 4(A), a plate-shaped core member 60 is prepared. Next, as shown in Fig. 4(B), the core member 60 is rolled up along the direction in which the insertion portion 65 and the receiving portion 66 are arranged, and the insertion portion 65 is inserted into the receiving portion 66. This causes the plate-shaped core member 60 to deform into a cylindrical shape.

[0035] As shown in FIG. 4(C), the tubular fire-resistant covering material 50 is attached into the beam through-hole 24 (FIG. 1) of the beam 2. Furthermore, a cylindrical core member 60 is inserted into the tubular opening 54 of the tubular fire-resistant covering material 50. At this time, with the receiving portion 66 inserted into the insertion portion 65, the core member 60 is rolled so that the inner diameter of the core member 60 is smaller than the inner diameter of the tubular opening 54. This makes it easier to insert the core member 60 into the tubular opening 54 of the tubular fire-resistant covering material 50.

[0036] When the core member 60 is inserted into the tubular fire-resistant covering material 50, as shown in Fig. 4(D), the core member 60 is positioned above the insulating material 3 arranged on the ceiling portion 12. This makes it possible to prevent the end openings 63, which are openings provided at the axial ends of the core member 60, from being covered by the insulating material 3 to some extent, and even if the end openings 63 are covered, a ventilation path can be secured through the outer peripheral openings 64.

[0037] 7(A) and 7(B) show cross-sectional views of a conventional ventilation sleeve 150. As shown in FIG. 7(A), the conventional ventilation sleeve 150 includes a tubular fireproof covering material 50 and a tubular core member 160 having the same axial length as the tubular fireproof covering material 50. In FIG. 7(A) and FIG. 7(B), the core member 160 is shown by a thick line. By abutting the core member 160 on the inner peripheral surface of the tubular fireproof covering material 50, it is possible to maintain the formability of the inner diameter of the tubular fireproof covering material 50 formed of a fiber-based material. However, the end opening 163 of the tubular fireproof covering material 50 may be closed by the heat insulating material 3 arranged above the ceiling portion 12, and a ventilation path may not be secured.

[0038] 7(B), in the conventional ventilation sleeve 150, if the axial lengths of the tubular fire-resistant covering material 50 and the core member 160 are the same, the position of the tubular fire-resistant covering material 50 and the position of the core member 160 will be misaligned when the core member 160 is inserted into the tubular fire-resistant covering material 50. In that case, since the core member 160 is not disposed at the left end portion of the tubular fire-resistant covering material 50, the hole diameter of the tubular fire-resistant covering material 50 becomes small, and it may be impossible to ensure a ventilation path.

[0039] The inventors have found the above problem as a result of intensive research, and have come up with the present invention to solve the problem. That is, the ventilation sleeve 5 of this embodiment is provided with a cylindrical core member 60 that is larger than the axial dimension of the tubular fireproof covering material 50 on the inner peripheral surface of the tubular fireproof covering material 50. As a result, even if the core member 60 is slightly shifted in the axial direction, the core member 60 is reliably positioned on the inner peripheral surface of the tubular fireproof covering material 50, so that the circular shape of the tubular fireproof covering material 50 can be maintained. Furthermore, since the core member 60 protrudes in the axial direction from the tubular fireproof covering material 50, the heat insulating material 3 can be held down. As a result, attic ventilation can be efficiently performed.

[0040] Furthermore, the ventilation sleeve 5 of this embodiment is provided with an outer peripheral opening 64 that opens upward in the outer region 62 of the core member 60. As a result, even if the end opening 63 is closed by the insulating material 3, ventilation is possible through the outer peripheral opening 64.

[0041] In the ventilation sleeve 5 of this embodiment, the core member 60 is plate-shaped, and when inserted into the tubular fire-resistant covering material 50, it is rolled into a cylindrical shape, and the insertion portion 65 is inserted into the receiving portion 66. This allows the core member 60 to be inserted with its diameter smaller than the diameter of the tubular opening 54 of the tubular fire-resistant covering material 50, improving workability. Furthermore, by inserting the insertion portion 65 into the receiving portion 66, the inner diameter dimension of the core member 60 can be maintained, and therefore the inner diameter dimension of the tubular opening 54 of the tubular fire-resistant covering material 50 can be ensured.

[0042] (About modified examples) A modified example of the ventilation sleeve 5 of the present embodiment will be described with reference to Fig. 5 and Fig. 6. Fig. 5 and Fig. 6 are diagrams showing a modified example of the ventilation sleeve. The difference between the above-described embodiment and this modified example is in the outer peripheral openings 64A, 64B provided in the core members 60A, 60B.

[0043] As shown in Fig. 5, the outer peripheral opening 64A of the core member 60A has a horizontally long rectangular shape, and for example, eight of them are provided vertically. The total opening area of ​​the multiple outer peripheral openings 64A is approximately the same as the opening area of ​​the end opening 63 (Figs. 1 and 2). This makes it possible to improve the strength of the rear end region without changing the opening area of ​​the outer peripheral opening 64A.

[0044] In this modification, the receiving portion 66A into which the inserting portion 65 is inserted is recessed inward from the lower end edge. This shape improves operability because the inserting portion 65 can be simply hooked onto the receiving portion 66A.

[0045] As shown in Fig. 6, the outer peripheral openings 64B of the core member 60B are circular and are provided in, for example, three rows horizontally and six rows vertically. The total opening area of ​​the multiple outer peripheral openings 64B is approximately the same as the opening area of ​​the end opening 63 (Figs. 1 and 2). This makes it possible to improve the strength of the rear end region without changing the opening area of ​​the outer peripheral openings 64B. In this modification, the shapes of the insertion portion 65 and the receiving portion 66A are the same as those of the above-mentioned modification.

[0046] <Embodiment 2> A ventilation sleeve 5C according to the second embodiment will be described with reference to Fig. 8 and Fig. 9. Fig. 8 is a cross-sectional view showing a state in which the ventilation sleeve according to the second embodiment of the present invention is placed in an attic space, and Fig. 9 is a plan view showing a core member of the ventilation sleeve. Only the differences from the core member 10 shown in the first embodiment will be described in detail below.

[0047] 8, the core member 60C includes an inner region 61 that contacts the tubular fire-resistant covering material 50, and an outer region 62C that extends in both directions from the inner region 61 and does not contact the tubular fire-resistant covering material 50. An outer peripheral opening 64C is provided on the outer peripheral surface of the outer region 62C. The width dimension of the outer region 62C in this embodiment may be the same as or larger than the width dimension of the outer region 62C in the above-mentioned first embodiment.

[0048] As shown in Fig. 3, the outer peripheral opening 64 of the core member 60 in the first embodiment is formed with a certain width from both outer edges. In contrast, as shown in Fig. 9, the outer peripheral opening 64C of the core member 60C in the present embodiment is cut inward from both outer edges of the core member 60C. As shown in Fig. 8, the outer peripheral opening 64C opens upward and extends over the entire width of the outer region 62C. As a result, while the inner region 61 is cylindrical, the outer region 62C is approximately semi-cylindrical.

[0049] 8, the vertical dimension H of the outer peripheral opening 64C is half or more of the diameter D of the core member 60C. As a result, even when the horizontal brace 25 described below is attached to the beam 2, the horizontal brace 25 passes through the outer peripheral opening 64C, so that the core member 60C does not interfere with the horizontal brace 25. Furthermore, if the vertical dimension H of the outer peripheral opening 64C is three-fifths or more of the diameter D of the core member 60C, the core member 60C can be prevented from interfering with the horizontal brace 25 even when the horizontal brace 25 is thick.

[0050] Next, the case where the ventilation sleeve 5C of this embodiment is placed in the ceiling space will be described. Fig. 10 is a perspective view showing the state where the ventilation sleeve is placed in the ceiling space. In Fig. 10, for ease of understanding, only the core member 60C is shown as the configuration of the ventilation sleeve 5C, and the box-shaped fireproof covering material 4 is omitted.

[0051] 10, horizontal braces 25 extending horizontally and intersecting each other are attached between the beams 2. The horizontal braces 25 are attached to the vertical center position of the web plate 23 of the beam 2, and extend horizontally at the vertical center height of the beam 2. The beam through holes 24 provided in the web plate 23 of the beam 2 are provided at the vertical center position of the web plate 23, and a plurality of them are provided in the extension direction of the beam 2.

[0052] The core member 60C of the ventilation sleeve 5C passes through the beam through hole 24. Since the height positions of the beam through hole 24 and the horizontal brace 25 are the same at the center position in the vertical direction of the beam 2, depending on the positional relationship between the beam through hole 24 and the horizontal brace 25, the core member 60C may come into contact with the horizontal brace 25.

[0053] Even in such a case, the core member 60C of this embodiment has an opening 64C cut out from both ends. Furthermore, the vertical dimension H of the opening 64C is equal to or greater than half the diameter D of the core member 60C. Therefore, even if the horizontal brace 25 is in a positional relationship that would likely intersect with the core member 60C, the horizontal brace 25 passes through the outer peripheral opening 64C of the core member 60C, so that the core member 60C does not come into contact with the horizontal brace 25.

[0054] <Modification> In the above embodiment, the box-shaped fire-resistant covering material 4 is provided to cover the sides and bottom of the beam 2, but the box-shaped fire-resistant covering material 4 does not necessarily have to be provided.

[0055] Although the core members 60, 60A, 60B, and 60C in the above embodiment are plate-shaped, they may be formed in a cylindrical shape in advance. Also, the core members 60, 60A, 60B, and 60C may be, for example, polygonal as long as they end up becoming hollow when passing through the beam through hole 24.

[0056] In the core member 60C of the second embodiment, the outer peripheral opening 64C is provided across the entire width of the outer region 62C, but it is sufficient that the outer peripheral opening 64C is provided in a part of the portion extending inward from both outer edges of the outer region 62C, and does not have to extend across the entire width. The width dimension of the outer peripheral opening 64C is appropriately selected depending on the horizontal brace 25 and the required ventilation volume.

[0057] Although the horizontal brace 25 has been described as extending horizontally at the central height in the up-down direction of the beam 2, this is not limited to this configuration, and the height position to which the horizontal brace 25 extends is not important. Furthermore, while the horizontal brace 25 can easily pass through the peripheral opening 64C of the second embodiment, the horizontal brace 25 can also pass through the peripheral opening 64 of the first embodiment depending on their positional relationship.

[0058] Furthermore, the outer peripheral openings 64, 64A, 64B, 64C, the insertion portion 65, and the receiving portions 66, 66A of the core members 60, 60A, 60B, 60C in the above-described embodiment and modified examples may be appropriately combined.

[0059] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0060] 1 attic space, 2 beam, 3 insulation, 4 box-shaped fire-resistant covering, 5 ventilation sleeve, 4 beam penetration hole, 50 tubular fire-resistant covering, 60, 60A, 60B, 60C core member, 61 inner area, 62, 62C outer area, 63 end opening, 64, 64A, 64B, 64C peripheral opening, 65 insertion portion, 66 receiving portion.

Claims

1. A ventilation sleeve to be placed in a through hole penetrating a beam that divides an attic space of a building, A cylindrical tubular fire-resistant covering material is disposed in the through hole and passes through the through hole; A cylindrical core member is disposed on the inner peripheral surface of the tubular fire-resistant covering material, The ventilation sleeve includes an inner region in contact with the tubular fire-resistant covering material and an outer region extending axially on both sides from the inner region and not in contact with the tubular fire-resistant covering material.

2. The ventilated sleeve according to claim 1 , wherein the outer region is provided with an opening that opens at least upwardly.

3. The ventilating sleeve of claim 2 , wherein the opening is multiple.

4. The ventilation sleeve according to claim 1 or 2, wherein the core member is plate-shaped when removed from the inner surface of the tubular fire-resistant covering material.

5. the core member includes an insertion portion provided at one end and a receiving portion provided at the other end remote from the one end for receiving the insertion portion, The ventilating sleeve of claim 4 , wherein the insert portion is inserted into the receiving portion to form a cylindrical shape.

6. A horizontal brace is provided in the attic space to connect the beams, The ventilated sleeve of claim 2 , wherein the opening has the horizontal brace passing therethrough.

Images