Membrane structures

Abstract

The aim is to reduce costs while suppressing deformation of the membrane material due to wind. [Solution] The membrane structure 10 comprises a pair of frames 22 arranged at intervals, a membrane material 32 stretched across the pair of frames 22, and a strip-shaped reinforcing membrane material 34 that spans the pair of frames 22 and is joined to the membrane material 32 in an overlapping state.

Description

Technical Field

[0004] , , , , , , , , , ,

[0006] , , ,<000002​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​The membrane structure according to claim 1 comprises a pair of frames arranged at intervals from each other, a membrane material stretched across the pair of frames, and a strip-shaped reinforcing membrane material that spans the pair of frames and is joined to the membrane material in an overlapping state.

[0009] According to the membrane structure of claim 1, a pair of frames are arranged with a gap between them. A membrane material is stretched across this pair of frames. A strip-shaped reinforcing membrane material, which spans the pair of frames, is joined to the membrane material in an overlapping manner.

[0010] As a result, the rigidity (tensile rigidity) of the area where the strip-shaped reinforcing membrane material is joined to the membrane material becomes higher than the rigidity of other areas. Therefore, deformation of the membrane material due to wind can be suppressed.

[0011] Furthermore, since the strip-shaped reinforcing membrane material is formed from a less expensive membrane material compared to reinforcing cables, costs can be reduced.

[0012] Thus, the present invention makes it possible to reduce costs while suppressing deformation of the membrane material due to wind.

[0013] The membrane structure according to claim 2 is the membrane structure according to claim 1, wherein the membrane material and the strip-shaped reinforcing membrane material are joined by welding.

[0014] According to the membrane structure of claim 2, the membrane material and the strip-shaped reinforcing membrane material are joined by welding. As a result, in the present invention, the membrane material and the strip-shaped reinforcing membrane material can be joined without making holes in the membrane material and the strip-shaped reinforcing membrane material, compared to the case in which the membrane material and the strip-shaped reinforcing membrane material are joined by, for example, sewing. Therefore, the waterproof performance of the membrane structure can be improved.

[0015] The membrane structure according to claim 3 comprises a pair of frames arranged at intervals from each other, and a pair of membrane materials stretched across the pair of frames adjacent to each other, with their ends overlapping in a strip-like manner and joined together.

[0016] According to the membrane structure according to claim 3, the pair of frames are arranged at intervals. A pair of membrane materials are stretched between the pair of frames such that the pair of membrane materials are adjacent to each other. Further, the ends of the pair of membrane materials extend over the pair of frames. The ends of the pair of membrane materials are joined in a state of being overlapped in a band shape.

[0017] As a result, in the pair of membrane materials, the rigidity (tensile rigidity) of the portion where the ends are joined is higher than that of other portions. Therefore, deformation of the membrane material due to wind can be suppressed.

[0018] In addition, since the pair of membrane materials are formed of a membrane material that is less expensive than a reinforcing cable, the cost can be reduced.

[0019] Thus, in the present invention, it is possible to suppress deformation of the membrane material due to wind while reducing the cost.

[0020] The membrane structure according to claim 4 is the membrane structure according to claim 3, wherein the ends of the pair of membrane materials are joined by welding.

[0021] According to the membrane structure according to claim 4, the ends of the pair of membrane materials are joined by welding. As a result, in the present invention, the ends of the pair of membrane materials can be joined without making holes in the ends of the membrane materials, as compared with the case where the ends of the pair of membrane materials are joined by, for example, sewing. Therefore, the waterproof performance of the membrane structure can be enhanced.

Effects of the Invention

[0022] As described above, according to the present invention, it is possible to suppress deformation of the membrane material due to wind while reducing the cost.

Brief Description of the Drawings

[0023] [Figure 1] It is a perspective view showing a membrane structure according to a first embodiment. [Figure 2]It is an exploded perspective view of the roof structure and the membrane body shown in FIG. 1. [Figure 3] It is an exploded perspective view showing the membrane material and the strip-shaped reinforcing membrane material shown in FIG. 1. [Figure 4] It is a perspective view showing the membrane structure according to the second embodiment. [Figure 5] It is an exploded perspective view of a plurality of membrane materials shown in FIG. 4. [Figure 6] It is a perspective view showing the analysis model of the membrane body according to the first embodiment. [Figure 7] It is a perspective view showing the analysis result of the analysis model shown in FIG. 6.

Mode for Carrying Out the Invention

[0024] (First Embodiment) First, the first embodiment will be described.

[0025] (Membrane Structure) In FIG. 1, as an example, a membrane structure (membrane structure building) 10 according to the first embodiment is shown. The membrane structure 10 is a membrane roof. This membrane structure 10 includes a roof structure 20 and a membrane body 30.

[0026] (Roof Structure) As shown in FIG. 2, the roof structure 20 is, for example, an arch structure. This roof structure 20 has a pair of frames 22 and a plurality of cross frames 24 installed on the pair of frames 22.

[0027] The pair of frames 22 are, for example, beam members formed of steel frame members such as steel pipes and steel sections, and are supported by columns (not shown) and the like. Also, the pair of frames 22 are arranged at intervals in the horizontal direction and are arranged substantially parallel to each other. A plurality of cross frames 24 are installed on the pair of frames 22.

[0028] The multiple cross frames 24 are, for example, beam members formed from steel members such as steel pipes or structural steel. Furthermore, the multiple cross frames 24 are arch members forming an arch shape.

[0029] Multiple cross frames 24 are arranged at intervals in the material axis direction (girder direction) of a pair of frames 22, and are installed at both ends and in the middle of the pair of frames 22 in the material axis direction.

[0030] Furthermore, the cross frame 24 is not limited to an arch shape; it may also be formed in a straight line. Additionally, the cross frame 24 can be attached to a pair of frames 22 as needed, and can be omitted as appropriate.

[0031] (membrane body) As shown in Figures 1 and 2, the membrane 30 is stretched across the roof frame 20, forming the roof of the membrane structure 10. The membrane 30 comprises a membrane material 32 and a plurality of strip-shaped reinforcing membrane materials 34. The membrane material 32 and the strip-shaped reinforcing membrane materials 34 are formed from membrane materials such as fiber membranes (types A, B, and C) or structural films.

[0032] The membrane material 32 serves as the base material for the membrane body 30 and primarily covers the structural surface of the roof frame 20. This membrane material 32 is arranged across a pair of frames 22 and across multiple cross frames 24.

[0033] On the other hand, the multiple strip-shaped reinforcing membrane materials 34 are reinforcing materials that partially reinforce the membrane material 32, and these strip-shaped reinforcing membrane materials 34 partially increase the rigidity of the membrane material 32 (membrane 30) (tensile rigidity in the opposing direction of the pair of frames 22).

[0034] The multiple strip-shaped reinforcing membrane materials 34 are formed in a strip shape that is narrower than the membrane material 32. Furthermore, the multiple strip-shaped reinforcing membrane materials 34 extend across the pair of frames 22 and are arranged at intervals in the material axis direction of the pair of frames 22.

[0035] Each strip-shaped reinforcing membrane material 34 is positioned between adjacent cross frames 24. More specifically, each strip-shaped reinforcing membrane material 34 is positioned in the center between adjacent cross frames 24. However, the strip-shaped reinforcing membrane material 34 may be positioned at a location offset from the center between adjacent cross frames 24.

[0036] As shown in Figure 3, each strip-shaped reinforcing membrane material 34 is joined to the surface of the membrane material 32 in an overlapping state. Specifically, the strip-shaped reinforcing membrane material 34 is joined to the surface of the membrane material 32 by welding.

[0037] Furthermore, the strip-shaped reinforcing membrane material 34 may be joined to the membrane material 32 not only by welding, but also by sewing, for example. Also, when the strip-shaped reinforcing membrane material 34 is welded to the surface of the membrane material 32, the membrane material 32 and the strip-shaped reinforcing membrane material 34 are formed from membrane materials such as fiber membranes (types A, B, and C) or structural films. The number and arrangement of the strip-shaped reinforcing membrane materials 34 can be appropriately changed according to the shape and size of the membrane structure 10.

[0038] (action) Next, the operation of the first embodiment will be described.

[0039] As shown in Figure 1, the membrane structure 10 according to this embodiment comprises a roof frame 20 and a membrane body 30. The roof frame 20 has a pair of frames 22 arranged at intervals and a plurality of cross frames 24 that are erected on the pair of frames 22.

[0040] The membrane 30 comprises a membrane material 32 and a plurality of strip-shaped reinforcing membrane materials 34. The membrane 30 is stretched across a pair of frames 22 and also across a plurality of cross frames 24. The strip-shaped reinforcing membrane materials 34, which extend across the pair of frames 22, are joined to the membrane material 32 in an overlapping state.

[0041] As a result, the rigidity (tensile rigidity) of the portion of the membrane material 32 where the strip-shaped reinforcing membrane material 34 is joined becomes higher than the rigidity of other portions. Therefore, deformation of the membrane material 32 due to wind can be suppressed.

[0042] Furthermore, since the strip-shaped reinforcing membrane material 34 is formed from a less expensive membrane material compared to the reinforcing cable, costs can be reduced.

[0043] Thus, in this embodiment, it is possible to reduce costs while suppressing deformation of the membrane material 32 (membrane 30) due to wind.

[0044] Furthermore, for example, if reinforcing cables are used to suppress deformation of the membrane material 32 due to wind, the labor required for installing the reinforcing cables increases. In contrast, in this embodiment, the strip-shaped reinforcing membrane material 34 is pre-attached to the membrane material 32 in a factory or the like, thereby reducing the labor required for on-site installation.

[0045] Furthermore, in this embodiment, a strip-shaped reinforcing membrane material 34 is placed between adjacent cross frames 24. This effectively suppresses deformation of the membrane material 32 due to wind. In particular, in this embodiment, the strip-shaped reinforcing membrane material 34 is placed in the central part between adjacent cross frames 24. This allows for even more efficient suppression of deformation of the membrane material 32 due to wind.

[0046] Furthermore, the membrane material 32 and the strip-shaped reinforcing membrane material 34 are joined by welding. As a result, in this embodiment, compared to joining the membrane material 32 and the strip-shaped reinforcing membrane material 34 by, for example, sewing, the membrane material 32 and the strip-shaped reinforcing membrane material 34 can be joined without making holes in the membrane material 32 and the strip-shaped reinforcing membrane material 34. Therefore, the waterproofing performance of the membrane structure 10 (membrane 30) can be improved.

[0047] (Second embodiment) Next, a second embodiment will be described. In the second embodiment, components and the like that have the same configuration as in the first embodiment will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.

[0048] (membrane structure) Figure 4 shows, as an example, a membrane structure 10 according to the second embodiment. The membrane structure 10 is a membrane roof and comprises a roof frame 20 and a membrane body 40.

[0049] The membrane body 40 has multiple membrane materials 42. These multiple membrane materials 42 are formed from membrane materials such as fiber membranes (types A, B, and C) and structural films. These membrane materials 42 serve as the base material for the membrane body 40 and mainly cover the structural surface of the roof frame 20 (see Figure 1).

[0050] Multiple membrane materials 42 are stretched across a pair of frames 22, adjacent to each other. Furthermore, adjacent pairs of membrane materials 42 are joined together with their ends 42E overlapping in a strip-like manner across the pair of frames 22. These ends 42E of the membrane materials 42 form a strip-shaped reinforcing portion 42P.

[0051] As described above, the ends 42E of an adjacent pair of membrane materials 42 are joined together in a strip-like overlapping state. Specifically, as shown in Figure 5, the ends 42E of an adjacent pair of membrane materials 42 are joined together by welding in a strip-like overlapping state.

[0052] Furthermore, the ends 42E of adjacent pairs of membrane materials 42 may be joined not only by welding, but also by other means such as sewing. In the case of welding the ends 42E of adjacent pairs of membrane materials 42, each membrane material 42 may be formed from a membrane material such as a fiber membrane (types A, B, or C) or a structural film.

[0053] The strip-shaped reinforcing portion 42P is a reinforcing material that partially reinforces the membrane material 42, and the rigidity of an adjacent pair of membrane materials 42 (membrane 40) (tensile rigidity of a pair of frames 22 in opposing directions) is partially increased by this strip-shaped reinforcing portion 42P.

[0054] The strip-shaped reinforcing sections 42P are positioned between adjacent cross frames 24 (see Figure 1). The number and arrangement of the strip-shaped reinforcing sections 42P can be appropriately changed depending on the shape and size of the membrane structure 10.

[0055] (action) Next, the operation of the second embodiment will be described.

[0056] As shown in Figure 4, the membrane structure 10 according to this embodiment comprises a roof frame 20 and a membrane body 40. The roof frame 20 has a pair of frames 22 arranged at intervals and a plurality of cross frames 24 (see Figure 1) that are erected on the pair of frames 22.

[0057] A pair of membrane materials 42 are stretched across a pair of frames 22, adjacent to each other. The ends 42E of adjacent pairs of membrane materials 42 are positioned across the pair of frames 22. These ends 42E of the membrane materials 42 are joined together in a strip-like overlapping state. These ends 42E of the membrane materials 42 form a strip-shaped reinforcement portion 42P.

[0058] As a result, the rigidity (tensile rigidity) of the strip-shaped reinforcing portion 42P, where the ends 42E of adjacent membrane materials 42 are joined, becomes higher than the rigidity of other parts. Therefore, deformation of the membrane material 42 (membrane 40) due to wind can be suppressed.

[0059] Furthermore, since the pair of membrane materials 42 are formed from a less expensive membrane material compared to the reinforcing cable, costs can be reduced.

[0060] Thus, in this embodiment, it is possible to reduce costs while suppressing deformation of the membrane material 42 (membrane 40) due to wind.

[0061] Furthermore, for example, if reinforcing cables are used to suppress deformation of the membrane material 42 due to wind, the labor required for installing the reinforcing cables increases. In contrast, in this embodiment, the strip-shaped reinforcing membrane material 34 is pre-attached to the membrane material 42 in a factory or the like, thereby reducing the labor required for on-site installation.

[0062] Furthermore, the ends 42E of adjacent pairs of membrane materials 42 are joined by welding. As a result, in this embodiment, compared to joining the ends 42E of adjacent pairs of membrane materials 42 by, for example, sewing, the ends 42E of adjacent pairs of membrane materials 42 can be joined without making holes in the adjacent pairs of membrane materials 42. Therefore, the waterproof performance of the membrane structure 10 can be improved.

[0063] (modified version) Next, modifications of the first and second embodiments described above will be explained. In the following, various modifications will be explained using the first embodiment as an example, but these modifications can also be appropriately applied to the second embodiment.

[0064] In the first embodiment described above, the roof frame 20 is formed in a rectangular shape when viewed from above. However, the shape of the roof frame 20 is not limited to a rectangle when viewed from above; for example, it may be a polygon or a circle.

[0065] Furthermore, in the first embodiment described above, the frame of the membrane structure 10 is a roof frame 20. However, the frame of the membrane structure 10 is not limited to a roof frame 20; for example, it may be another frame.

[0066] (analysis) In this analysis, the deformation amount due to wind load was analyzed for the membrane 30 according to the first embodiment.

[0067] (Analysis Model) Figure 6 shows an analytical model of the membrane 30. In this analytical model of the membrane 30, a single strip-shaped reinforcing membrane material 34 is joined to the membrane material 32. The membrane material 32 and the strip-shaped reinforcing membrane material 34 are assumed to be made of the same membrane material. Therefore, the stiffness of the part of the membrane material 32 to which the strip-shaped reinforcing membrane material 34 is joined (the tensile stiffness in the longitudinal direction of the strip-shaped reinforcing membrane material 34) is made higher than the stiffness of other parts.

[0068] (Analysis method) Assuming an upward wind load, a uniformly distributed load perpendicular to the membrane surface was applied to the lower surface of the analysis model of the membrane 30, and the displacement of the analysis model in the Z direction was analyzed using the finite element method.

[0069] (Analysis results) Figure 7 shows the analysis results of the analytical model of the membrane 30. As shown in Figure 7, it can be seen that the displacement (in the Z direction) of the part of the membrane material 32 to which the strip-shaped reinforcing membrane material 34 is joined is smaller than the displacement (in the Z direction) of other parts. From this, it can be seen that by joining the strip-shaped reinforcing membrane material 34 to the membrane 30, deformation of the membrane material 32 (membrane 30) due to wind is suppressed. Similarly, it can be inferred that deformation of the membrane material 42 (membrane 40) due to wind is suppressed in the second embodiment as well.

[0070] Although one embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and various modifications may be used in appropriate combinations with one embodiment, and of course, the invention can be implemented in various forms without departing from the spirit of the present invention. [Explanation of symbols]

[0071] 10 Membrane structure 22 frames 32 Membrane material 34. Strip-shaped reinforcing membrane material 42 Pair of membrane materials 42E End of a pair of membrane materials

Claims

1. A pair of frames placed at intervals, A membrane material stretched across the pair of frames, A strip-shaped reinforcing membrane material that spans the pair of frames and is joined to the membrane material in a superimposed state, A membrane structure equipped with the following features.

2. The aforementioned membrane material and the aforementioned strip-shaped reinforcing membrane material are joined together by welding. The membrane structure according to claim 1.

3. A pair of frames placed at intervals, A pair of membrane materials are stretched across the pair of frames adjacent to each other, and the ends of the membrane materials that span the pair of frames are joined together in a strip-like manner, A membrane structure equipped with the following features.

4. The ends of the pair of film materials are joined together by welding. The membrane structure according to claim 3.

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