Airtight materials and airtight construction methods for buildings

Abstract

To form an airtight line without requiring much labor and to shorten construction time. [Solution] The airtight material 1 comprises a balloon that expands when gas is sealed in it, expanding the airtight material body from the inside, and an expandable frame, inside a bag-shaped airtight material body 2 made of an elastic material that is stretchable in the lengthwise and radial directions. The balloon has a gas sealing port 31 that penetrates the airtight material body 2 and leads to the outside. The frame is fitted to the balloon, and is capable of expanding with the expanding balloon and maintaining the expanded shape, maintaining the expanded shape of the airtight material body 2 from the inside.

Description

[Technical Field]

[0001] The present disclosure relates to an airtight material for forming an airtight line in a building and an airtight construction method. [Background technology]

[0002] Conventionally, in order to ensure the airtightness of buildings, methods have been known, such as sealing the gap between the sash frame and the periphery of the opening with airtight tape or installing a resin airtight material such as ethylene propylene diene rubber, as disclosed in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-337028 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there are many irregularly shaped protruding parts on the interior side of the structural frame, and areas around them are prone to airtightness defects. At actual construction sites, it is time-consuming to form airtight lines by tightly sealing the airtight material so that it can properly surround these areas, and the quality of construction varies depending on the skill of the contractor. Other methods include inserting pre-formed dry airtight material made from polypropylene resin or injecting urethane resin or other injectable foam to fill gaps, but ensuring adhesion to adjacent components is difficult. Injectable foam requires time to complete the foaming process, and the shape of the expansion cannot be controlled, requiring the work of removing any protruding parts from the gaps.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and its purpose is to provide an airtight material and an airtight construction method for buildings that can form airtight lines without requiring much effort and can shorten construction time. [Means for solving the problem]

[0006] The solution of the present disclosure to achieve the above object is an airtight material that is placed in gaps in a building to form an airtight line, and is characterized by comprising: a bag-shaped airtight material body made of an elastic material that is stretchable in both the longitudinal and radial directions; a balloon that is placed inside the airtight material body and expands when gas is sealed in, thereby expanding the airtight material body from the inside; and an expandable frame that is placed inside the airtight material body, and the balloon has a gas sealing inlet that penetrates the airtight material body and is led to the outside, and the frame is attached to the balloon so that it can expand with the expanding balloon and maintain the expanded shape, thereby maintaining the expanded shape of the airtight material body from the inside.

[0007] Furthermore, in the airtight material, it is preferable that a belt is attached to the balloon, both longitudinal ends of the belt are overlapped without being fixed, the belt is wrapped circumferentially around the balloon, and the belt is configured to be expandable in diameter in response to the expansion of the balloon, and a rupture member is provided on one longitudinal end of the belt, and when the overlap length of the both ends is shortened to a predetermined length by the expanding balloon, the rupture member ruptures the balloon.

[0008] In the airtight material, it is preferable that the belt has the rupture member with a sharp tip on one side and a through hole through which the rupture member is inserted on the other side.

[0009] In this case, it is preferable that the inner diameter of the belt when the rupturable member is inserted through the through-hole corresponds to the outer diameter required for the balloon when inflated.

[0010] In the airtight material, the belt is preferably interposed between the airtight material body and the frame, or the belt may be interposed between the frame and the balloon.

[0011] Furthermore, an airtight construction method for a building that forms an airtight line using the airtight material according to each of the above-mentioned solutions also falls within the scope of the technical idea of ​​the present disclosure. That is, the airtight construction method includes the steps of: arranging the airtight material, whose balloon is in a deflated state, along a gap in a building; inflating the balloon by sealing a gas in the balloon through the sealing port, and expanding the frame and the airtight material body; and rupturing or removing the inflated balloon, and is characterized in that the gap is sealed with the airtight material having the expanded airtight material body whose shape is maintained by the frame. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to form an airtight line without much effort, thereby shortening construction time. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing an airtight material according to a first embodiment of the present disclosure. [Figure 2] FIG. 10 is a perspective view showing a balloon disposed inside the airtight material. [Figure 3] FIG. 2 is a perspective view showing a frame disposed inside the airtight material. [Figure 4] FIG. 10 is a perspective view showing a belt disposed inside the airtight material. [Figure 5] 2 is a cross-sectional view of the airtight material shown in FIG. 1 along the line AA. [Figure 6] FIG. 10 is a cross-sectional view showing the airtight material when the balloon is inflated. [Figure 7] FIG. 10 is a cross-sectional view showing the airtight material after the balloon has burst. [Figure 8] FIG. 4 is a cross-sectional view showing an airtight material according to a second embodiment of the present disclosure. [Figure 9]FIG. 10 is a cross-sectional view showing an airtight material according to a third embodiment of the present disclosure. [Figure 10] Figures 10(a) and 10(b) show an enlarged view of the foundation of a building, with Figure 10(a) being a cross-sectional view showing the preparation process for installing airtight material, and Figure 10(b) being a cross-sectional view showing the state after installation is completed. [Figure 11] Figures 11(a) and 11(b) show enlarged views of a pipe penetration in a building, with Figure 11(a) being a cross-sectional view showing the preparation process for installing the airtight material, and Figure 11(b) being a cross-sectional view showing the state after installation is completed. DETAILED DESCRIPTION OF THE INVENTION

[0014] An airtight material and an airtight construction method for a building according to an embodiment of the present disclosure will be described with reference to the drawings. Note that common components in each embodiment are designated by common reference numerals, and duplicated descriptions will be omitted.

[0015] (Embodiment 1) Figure 1 is an oblique view showing an airtight material 1 according to embodiment 1 of the present disclosure, Figure 2 is an oblique view showing a balloon 3 arranged inside the airtight material 1, Figure 3 is an oblique view showing a frame 4 arranged inside the airtight material 1, Figure 4 is an oblique view showing a belt 5 arranged inside the airtight material 1, and Figure 5 is a cross-sectional view of the airtight material 1 along line AA in Figure 1.

[0016] The airtight material 1 has an airtight material body 2 made of an elastic material that is stretchable in the lengthwise and radial directions. As shown in Fig. 1, the airtight material body 2 is a bag-shaped body having a certain length, and both ends in the lengthwise direction are closed. The airtight material body 2 is preferably made of a material that has appropriate flexibility, pliability, and airtightness so that it can be disposed in gaps between structural members in a building. Examples of materials that make up such an airtight material body 2 include TPE (thermoplastic resin rubber elastic body) and silicone rubber, with TPU (thermoplastic polyurethane) being particularly preferred.

[0017] 5, the belt 5, frame 4, and balloon 3 are arranged in this order from the outside inside the airtight material body 2. That is, the balloon 3, frame 4, and belt 5 are arranged in this order from the inside, and are entirely covered by the airtight material body 2.

[0018] The balloon 3, which is disposed at the most central part inside the airtight material body 2, is made of an elastic material that can expand uniformly in the lengthwise and radial directions, and can be expanded uniformly without bias by the gas such as air that is enclosed inside. The balloon 3 expands when gas is enclosed inside, expanding the airtight material body 2 from the inside.

[0019] As shown in Figure 2, when deflated, the balloon 3 is a bag-like body having an elongated shape along the longitudinal direction of the airtight material body 2. A gas inlet 31 is provided at one end of the balloon 3. In the illustrated embodiment, the inlet 31 is provided so as to protrude in a direction perpendicular to the longitudinal direction of the airtight material body 2. The protruding direction of the inlet 31 is not limited thereto, and it may be provided so as to protrude in the longitudinal direction of the airtight material body 2, for example, or may be provided so as to protrude in any direction. A check valve (not shown) is provided inside the inlet 31, and only gas is allowed to flow from the inlet 31 into the inside of the balloon 3.

[0020] As shown in Fig. 1, an outlet port 21 is opened near one end of the airtight material body 2. An inlet port 31 of the balloon 3 is led out to the outside of the airtight material body 2 through the outlet port 21. A gas supply pipe can be connected to the inlet port 31. The outlet port 21 is not limited to being provided near one end of the airtight material body 2, and may be provided in any position and in any shape as long as it is opened corresponding to the position where the inlet port 31 of the balloon 3 is provided.

[0021] A frame 4 is attached to the balloon 3. As shown in Fig. 3, the frame 4 has an overall shape that is long in the longitudinal direction of the airtight material body 2, corresponding to the length of the airtight material body 2. The frame 4 is made of, for example, a metal wire material that can retain its shape, such as a wire.

[0022] In the illustrated embodiment, the frame 4 is configured to include a plurality of straight sections 41 arranged along the length direction, curved sections 42 connecting these straight sections 41, and linear connecting sections 43 connecting the curved sections 42. The frame 4 is formed so that, for example, the curvature of the curved sections 42 changes as the balloon 3 disposed inside it expands, making the overall shape radially expandable.

[0023] The balloon 3 is further covered with a belt 5. As shown enlarged in FIG. 4, the belt 5 is a long, strip-shaped member that is wound around a cylinder in the circumferential direction C. Examples of materials that can be used to form the belt 5 include PVC (polyvinyl chloride) and aluminum. One end 51 of the belt 5 is provided with a rupture member 53, and the other end 52 is provided with a through-hole 54. The rupture member 53 is a needle-shaped member with a sharp tip that protrudes from the inner surface of the one end 51 of the belt 5, with the tip extending inward (toward the center of the wound belt 5).

[0024] As shown in Fig. 5, the belt 5 is interposed between the airtight material body 2 and the frame 4, and is wound around the frame 4 and the balloon 3 inside it in the circumferential direction. One end 51 and the other end 52 of the belt 5 are overlapped without being joined or fixed. One end 51 of the belt 5 equipped with the rupturable member 53 is positioned away from the other end 52 equipped with the through-hole 54. The tip of the rupturable member 53 abuts against the circumferential portion of the belt 5.

[0025] In Figure 5, the balloon 3 is in a contracted state with no gas sealed inside. In this state, for example, the outer diameter of the airtight material body 2 constituting the airtight material 1 is 2 to 10 mm, and is sized to be able to be placed along a gap. The airtight material body 2 is formed so as to have an outer shape with a circular cross section at least when expanded. The length (lengthwise dimension) of the airtight material body 2 is not limited and can be set arbitrarily, and the length can be set appropriately depending on the location where it is placed.

[0026] 6 is a cross-sectional view showing the airtight material 1 when the balloon 3 is inflated. As shown in the figure, a gas supply pipe 6 is connected to the sealing port 31 of the balloon 3, and a gas such as air is sealed in the balloon 3. This causes the balloon 3 disposed inside the frame 4 to inflate. The inflation pressure of the balloon 3 also causes the frame 4 and the airtight material main body 2 to expand radially.

[0027] Furthermore, the belt 5 slides in the circumferential direction, with both ends 51, 52 approaching each other, shortening the overlap length and expanding in diameter in response to the inflation of the balloon 3. For example, as shown in FIG. 6 , the belt 5 expands until its inner diameter corresponds to the outer diameter of the inflated balloon 3. One end 51 and the other end 52 of the belt 5 overlap each other, and the rupture member 53 passes through the through-hole 54. This allows the tip of the rupture member 53 to pass through the through-hole 54 and reach the balloon 3 between the circumferentially adjacent straight portions 41, thereby rupturing the balloon 3.

[0028] 7 is a cross-sectional view showing the airtight material 1 after the balloon 3 has burst. The burst balloon 3 can be removed to the outside, for example, through the outlet 21 of the airtight material body 2. As shown in the figure, the frame 4 maintains the shape expanded by the balloon 3, and maintains the expanded shape of the airtight material body 2 from the inside. A cylindrical cavity 10 is formed inside the airtight material body 2 and the frame 4.

[0029] The airtight material 1 configured in this manner can be disposed in gaps in a building to form an airtight line. For example, it is preferable that the inner diameter of the belt 5 when the rupturing member 53 is inserted through the through-hole 54 is set to correspond to the outer diameter required for the balloon 3 when inflated. By setting the inner diameter of the belt 5 according to the size of the gap in the building where the airtight material 1 is to be installed and adjusting the positions of the rupturing member 53 and the through-hole 54, it is possible to rupture the balloon 3 at the desired outer diameter and bring the airtight material body 2 into close contact with the gap. Therefore, the belt 5 makes it possible to adjust the cross-sectional dimensions of the airtight material 1.

[0030] The hollow portion 10 formed by removing the balloon 3 may be left as it is, but it is also possible to impart insulating properties to the airtight material 1 by filling the hollow portion 10 with insulating material through the sealing port 31 of the balloon 3.

[0031] (Embodiment 2) FIG. 8 is a cross-sectional view showing an airtight material 1a according to the second embodiment, which is a cross-sectional view taken along line AA in FIG.

[0032] In the airtight material 1, the belt 5 is not limited to being interposed between the airtight material body 2 and the frame 4. For example, as in the airtight material 1a shown in Fig. 8, the belt 5 may be interposed between the frame 4 and the balloon 3.

[0033] In this embodiment, the belt 5 is disposed in a smaller wound shape inside the frame 4. The belt 5 may have a shape with multiple bent portions as shown in Fig. 4, or may be wound in a curved shape without bent portions as shown in Fig. 8.

[0034] When gas is sealed into the balloon 3 through the sealing port 31, the balloon 3 expands, the belt 5 expands in diameter, and the frame 4 and the airtight material main body 2 also expand. When the overlap length of both end portions 51, 52 of the belt 5 is shortened and the rupture member 53 at one end portion 51 is inserted into the through-hole 54 at the other end portion 52, the balloon 3 is ruptured by the rupture member 53. As a result, as in the above embodiment, an airtight material 1a of a predetermined shape can be obtained, with the expanded shape of the airtight material main body 2 maintained from the inside by the frame 4.

[0035] (Embodiment 3) FIG. 9 is a cross-sectional view showing an airtight material 1b according to the third embodiment, and corresponds to the cross section AA in FIG.

[0036] The belt 5 does not necessarily have to be provided in the airtight material 1. For example, the airtight material 1b shown in Fig. 9 may not have the belt 5, and may have a configuration in which the frame 4 and the balloon 3 are arranged in this order from the inside inside the airtight material body 2.

[0037] Furthermore, the balloon 3 does not need to be provided with a check valve, and is configured to expand and contract by sealing and discharging gas through the sealing port 31. In this case, the amount of gas sealed in the balloon 3 through the sealing port 31 is adjusted, and the sealing of gas is stopped when the airtight material main body 2 has expanded to the desired size. The balloon 3 is then evacuated to contract, and the deflated balloon 3 can be pulled out and removed from the outlet 21 of the airtight material main body 2. Even in this configuration, an airtight material 1b of a predetermined shape can be obtained, as in the above embodiment, in which the expanded shape of the airtight material main body 2 is maintained from the inside by the frame 4.

[0038] (Airtight construction method) An airtight construction method for a building in which an airtight line is formed using the above-mentioned airtight materials 1 (1a, 1b) will be described below, taking as an example a case in which it is applied to the foundation and pipe penetrations of a building.

[0039] 10(a) and 10(b) are enlarged cross-sectional views of the foundation of a building, with FIG. 10(a) showing the preparation process for installing the airtight material 1 and FIG. 10(b) showing the state after installation is completed.

[0040] For example, as shown in FIG. 10(a), an exterior wall material 73 is supported via a wall frame 74 on a foundation 71 that rises from the ground. The exterior wall material 73 is, for example, an exterior wall panel that constitutes the exterior wall surface of a building. The wall frame 74 includes a vertical frame member 741 and a lower frame member 742, which are made of lip channel steel with a generally C-shaped cross section. A water flashing 75 is connected to the lower frame member 742 via mounting brackets. The water flashing 75 is disposed below the exterior wall material 73 and prevents rainwater from seeping into the foundation 71. A support member 72 is interposed between the lower frame member 742 and the foundation 71, forming a gap that allows ventilation.

[0041] As an airtight construction method, an airtight material 1 is placed in such gaps to form an airtight line. As shown in FIG. 10(a), the airtight material 1 is placed on the top surface of the foundation 71 along the direction in which the lower frame material 742 is placed (construction preparation process). The airtight material 1 has its balloon 3 in a deflated state and has appropriate flexibility and pliability, so it can be easily placed along the gaps. Multiple airtight materials 1 may be placed in a line in the lengthwise direction to match the length of the gaps.

[0042] Next, gas is sealed in the balloon 3 through the sealing port 31, causing the balloon 3 to expand, expanding the frame 4 and the airtight material body 2. The inflated balloon 3 is ruptured by the rupture member 53 of the belt 5. In the case of the airtight material 1b that does not have the belt 5, the gas sealed in the balloon 3 is released and the balloon 3 is deflated. Next, the balloon 3 is removed from inside the airtight material body 2.

[0043] This allows installation of an airtight material 1 having an expanded airtight material body 2 whose shape is maintained by the frame 4. As shown in Figure 10(b), the airtight material 1 adheres to the gap between the foundation 71 and the lower frame material 742, sealing the gap and forming an airtight line inside and outside the airtight material 1. Furthermore, in the airtight material 1 installed in this manner, a heat insulating material may be filled inside the airtight material body 2 from which the balloon 3 has been removed.

[0044] 11(a) and 11(b) are enlarged cross-sectional views of a pipe penetration in a building, with FIG. 11(a) showing the preparation process for installing the airtight material and FIG. 11(b) showing the state after installation is completed.

[0045] In buildings, plumbing equipment such as water supply and drainage pipes are often installed by penetrating floors, walls, etc. Conventionally, for example, in the case of a toilet water supply pipe that penetrates the floor surface, the gap between the through hole and the pipe is often sealed with putty or a sealant. The airtight material 1 according to this embodiment can be applied not only to the foundations described above, but also to various plumbing penetrations installed indoors.

[0046] For example, as shown in Figure 11(a), a water supply pipe 81 runs up from under the floor, penetrating a floor panel 82, and is connected to sanitary fixtures such as a toilet. A floor finishing material 83 is stretched over the floor panel 82, and a through-hole 84 through which the water supply pipe 81 passes is formed in the floor panel 82 and the floor finishing material 83.

[0047] As an airtight construction method, the airtight material 1 with its balloon 3 in a deflated state is placed in the gap between the water supply pipe 81 and the through-hole 84 (construction preparation process). In this case, the airtight material 1 is placed so as to be wrapped around the outer circumferential surface of the water supply pipe 81. The airtight material 1 has its balloon 3 in a deflated state and has appropriate flexibility and pliability, so it can be easily placed along the water supply pipe 81.

[0048] Next, gas is sealed into the balloon 3 and it is inflated, expanding the frame 4 and the airtight material body 2. Then, the ruptured or evacuated balloon 3 is removed from inside the airtight material body 2, and the airtight material 1 with the shape-retained airtight material body 2 can be installed on the frame 4.

[0049] 11(b), the airtight material 1 is disposed in close contact between the water supply pipe 81 and the through-hole 84, sealing the through-hole 84. This allows an airtight line to be formed inside and outside the airtight material 1 at the pipe penetration portion. A cover 85 is placed around the water supply pipe 81 on the floor finishing material 83 so as to cover the through-hole 84 sealed with the airtight material 1.

[0050] The airtight construction method for a building in which an airtight line is formed using the airtight material 1 is not limited to the above-mentioned examples and can be applied not only to the foundations and pipe penetrations of the building but also to various parts of the building such as around openings and around beams. By using the airtight material 1, it is possible to form an airtight line regardless of the skill level of the builder and without requiring considerable effort, thereby shortening the construction time and improving the construction quality.

[0051] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical gist thereof, and all technical matters included in the technical ideas described in the claims are the subject of the present disclosure. The above-described embodiments are preferred examples, but various modifications can be realized from the disclosed contents, and such modifications are also included in the technical scope described in the claims.

[0052] The following supplementary notes are further disclosed regarding the technical contents described in the above-mentioned embodiments.

[0053] (Appendix 1) An airtight material that is disposed in a gap in a building to form an airtight line, a bag-shaped airtight material body made of an elastic material that is stretchable in the length direction and the radial direction; a balloon disposed inside the airtight material body and inflated by the sealed gas to expand the airtight material body from the inside; An expandable frame disposed inside the airtight material body, The balloon has a gas inlet, and the inlet penetrates the airtight material body and is led to the outside. The frame is attached to the balloon, and is capable of expanding with the expanding balloon and maintaining the expanded shape, thereby maintaining the expanded shape of the airtight material body from the inside.

[0054] (Appendix 2) The airtight material according to appendix 1, The balloon is covered with a belt, the belt is overlapped without being fixed at both ends in the longitudinal direction, and is wound around the balloon in the circumferential direction so as to be expandable in diameter in response to inflation of the balloon; An airtight material characterized in that a rupturable member is provided on one side of the longitudinal direction of the belt, and when the overlap length of both ends is shortened to a predetermined length by the expanding balloon, the rupturable member ruptures the balloon.

[0055] (Appendix 3) An airtight material according to appendix 2, The belt is provided with the rupturable member having a sharp tip on one side and a through hole through which the rupturable member is inserted on the other side.

[0056] (Appendix 4) An airtight material according to appendix 3, An airtight material characterized in that the inner diameter of the belt when the rupturable member is inserted into the through hole is set to correspond to the outer diameter required for the balloon when inflated.

[0057] (Appendix 5) In the airtight material according to any one of Supplementary Notes 2 to 4, The airtight material is characterized in that the belt is interposed between the airtight material body and the frame.

[0058] (Appendix 6) In the airtight material according to any one of Supplementary Notes 2 to 4, The airtight material is characterized in that the belt is interposed between the frame and the balloon.

[0059] (Appendix 7) An airtight construction method for a building that forms an airtight line using the airtight material according to any one of appendices 1 to 6, A step of disposing the airtight material with the balloon in a deflated state along a gap in a building; a step of inflating the balloon by sealing gas in the balloon through the sealing port and expanding the frame and the airtight material body; and rupturing or removing the inflated balloon. An airtight construction method characterized by sealing the gap with the airtight material having the expanded airtight material body whose shape is maintained by the frame. [Explanation of symbols]

[0060] 1. Airtight material 2. Airtight material body 21 Outlet 3. Balloon 31 Envelope 4 frames 41 Straight section 42 Curved section 43 Connecting part 5 Belt 51 One end 52 Other end 53 Bursting Member 54 Through hole 6 Supply pipe 71 Basics 72 Support member 73 Exterior wall materials 74 Wall Frame 741 Vertical frame material 742 Lower frame material 75 Drainer 81 Water supply pipe 82 Floor Panel 84 Through Hole

Claims

1. An airtight material that is disposed in a gap in a building to form an airtight line, a bag-shaped airtight material body made of an elastic material that is stretchable in the length direction and the radial direction; a balloon disposed inside the airtight material body and inflated by the sealed gas to expand the airtight material body from the inside; An expandable frame disposed inside the airtight material body, The balloon has a gas inlet, and the inlet penetrates the airtight material body and is led to the outside. The frame is attached to the balloon, and is capable of expanding with the expanding balloon and maintaining the expanded shape, thereby maintaining the expanded shape of the airtight material body from the inside.

2. The airtight material according to claim 1, The balloon is covered with a belt, the belt is overlapped without being fixed at both ends in the longitudinal direction, and is wound around the balloon in the circumferential direction so as to be expandable in diameter in response to inflation of the balloon; An airtight material characterized in that a rupturable member is provided on one side of the longitudinal direction of the belt, and when the overlap length of both ends is shortened to a predetermined length by the expanding balloon, the rupturable member ruptures the balloon.

3. The airtight material according to claim 2, The belt is provided with the rupturable member having a sharp tip on one side and a through hole through which the rupturable member is inserted on the other side.

4. The airtight material according to claim 3, An airtight material characterized in that the inner diameter of the belt when the rupturable member is inserted into the through hole is set to correspond to the outer diameter required for the balloon when inflated.

5. In the airtight material according to any one of claims 2 to 4, The airtight material is characterized in that the belt is interposed between the airtight material body and the frame.

6. In the airtight material according to any one of claims 2 to 4, The airtight material is characterized in that the belt is interposed between the frame and the balloon.

7. An airtight construction method for a building that forms an airtight line using the airtight material according to any one of claims 1 to 4, A step of disposing the airtight material with the balloon in a deflated state along a gap in a building; a step of inflating the balloon by sealing gas in the balloon through the sealing port and expanding the frame and the airtight material body; and rupturing or removing the inflated balloon. An airtight construction method characterized by sealing the gap with the airtight material having the expanded airtight material body whose shape is maintained by the frame.

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