Tsunami shelter

Abstract

To provide a shelter for tsunami capable of protecting human life with high probability from the occurrence of tsunami until the lapse of a prescribed time without requiring time and labor for construction including the cost of a structure.SOLUTION: The shelter includes a shelter main body 2 in which at least an upper position is sealed and a living room space S can be secured inside, and an outer wall part 3 surrounding the periphery of the shelter main body 2 that interferes with a dynamic influence on the shelter main body 2 by at least hydraulic power and a fluid generated by a tsunami.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tsunami shelter that allows evacuation in the event of a tsunami. [Background technology]

[0002] Tsunamis generated by major earthquakes and other disasters surge toward land at incredible speeds, threatening to destroy homes and other buildings. To escape such a tsunami, people must evacuate to a location higher than the point where the tsunami reaches. However, this is difficult for people in areas without high ground, or for children, the elderly, and people with disabilities. Furthermore, evacuation facilities are generally located far away, and considering the speed of the tsunami, there is a high possibility that not only the elderly and those with walking difficulties, but also able-bodied people and evacuation guides, will be delayed in escaping. Therefore, these evacuation facilities are not sufficient measures to mitigate human casualties in the event of a tsunami.

[0003] In response to these problems, shelters that can be installed near residences have been developed with the aim of securing evacuation sites that residents can evacuate to in a short time and that are close to their living environments (see Patent Document 1). The shelter described in Patent Document 1 is made up of a highly airtight outer shell with a living space inside, and an opening that allows people to enter and exit is provided on the front side of the side of the outer shell, with the living space being located above the top of the opening. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-233385 A (page 3, Figure 5) Summary of the Invention [Problem to be solved by the invention]

[0005] In a shelter like the one described in Patent Document 1, the water level flowing in through the opening does not rise above the top of the opening, preventing air from escaping from the shelter and water from entering the living space, thereby enabling life support for a predetermined period of time. However, the shelter itself, including the air-retaining section, must be made durable enough to withstand the water pressure of a tsunami and the sediment washed away by the tsunami, which creates problems such as the time and effort required to construct the shelter, including the cost of the structure. Furthermore, with conventional structures, if sand or wood accumulates and blocks the opening, there is a risk that people cannot be quickly rescued or escape from the tsunami shelter, and it has been pointed out that the shelter is not sufficiently effective in protecting human lives within a predetermined time after the tsunami occurs.

[0006] The present invention was made with an eye on these problems, and aims to provide a tsunami shelter that does not require time or effort to construct, including the cost of the structure, and that can protect human lives with a high probability from the time a tsunami occurs until a specified time has passed. [Means for solving the problem]

[0007] In order to solve the above problems, the tsunami shelter of the present invention comprises: The shelter comprises a shelter body that is sealed at least at the upper position and can secure a living space inside, and an outer wall portion that surrounds the periphery of the shelter body and interferes with the mechanical influence on the shelter body by at least the water force and floating objects generated by the tsunami, The outer wall portion is supported by the ground or the like, and the shelter body and the outer wall portion are constructed as separate structures. According to this feature, even in the event of a tsunami, the air inside the shelter will not leak out, ensuring habitable space, and the outer walls supported by the ground will protect the shelter from the pressure of the tsunami and the impact of debris and other floating objects swept away by the tsunami. Because the structure that provides the habitable space and the protective structure are constructed separately in this way, construction does not require much time or effort, including the cost of the structure, and there is a high probability that human lives will be protected within a specified time after the tsunami occurs.

[0008] A communication port is formed in the outer wall portion so as to penetrate laterally, The shelter body has an entrance formed at the lower side of the living space, The shelter is characterized in that the communication opening in the outer wall portion and the entrance / exit of the shelter main body are positioned in a communicating state. This feature allows people to quickly escape from the tsunami shelter after the tsunami has subsided by going through the entrance and exit of the shelter body and the connecting opening in the outer wall, thereby ensuring a high probability of protecting lives in the event of a tsunami.

[0009] The shelter body is characterized in that it is installed inside the outer wall portion so as to be movable in the vertical direction relative to the outer wall portion. This feature allows the tsunami shelter to be moved after a tsunami occurs, providing an opportunity for people to quickly escape, and thus making it highly likely that human lives will be saved when a tsunami occurs.

[0010] The shelter body is characterized in that it is installed inside the outer wall portion so that it can move up and down relative to the outer wall portion but cannot rotate. According to this feature, communication between the communication opening in the outer wall portion and the entrance / exit of the shelter body can be reliably ensured.

[0011] The outer wall portion and the shelter main body are connected by a connecting device that can be engaged and disengaged. This feature prevents the shelter body from being accidentally separated from the outer wall when a tsunami occurs.

[0012] The outer wall portion is characterized by having a flange portion extending outward at the lower end portion. According to this feature, the flange portion at the lower end of the outer wall portion is integrated with the ground, etc., thereby preventing the outer wall portion from being washed away by a tsunami.

[0013] The outer wall portion is characterized in that the bottom of the shelter body is open, allowing water to flow downward. This feature allows seawater that has flowed between the shelter body and the outer wall to be quickly drained into the ground.

[0014] The shelter body is characterized by having a dome-shaped upper portion. This feature improves the impact resistance of the upper part of the shelter body facing the upper opening of the outer wall.

[0015] The shelter body is characterized in that it is installed inside the outer wall portion so that its upper end is located lower than the upper end of the outer wall portion. According to this feature, the outer wall portion supported by the ground or the like can reliably protect the shelter body from the pressure of the tsunami and the collision of floating objects such as rubble swept away by the tsunami.

[0016] The shelter body is characterized by having a cylindrical portion extending downward from the floor board of the living space, the tip of which forms the entrance / exit. According to this feature, the seawater level approaching below the floorboards of the living space is pushed downward by air pressure within the cylindrical portion, preventing it from exceeding the tip of the cylindrical portion, thereby effectively preventing water from flooding into the living space.

[0017] The outer wall portion is mainly formed of concrete, The shelter body is mainly made of synthetic resin and has a hanging support part at the top. According to this feature, by forming the outer walls out of concrete, the shelter can withstand the pressure of the tsunami, as well as debris swept away by the tsunami, collisions with buildings and ships, and by forming the shelter body protected by the outer walls out of lightweight synthetic resin, the external force required to move it upward can be reduced.

[0018] The outer wall portion is characterized in that it is installed in a state where at least a part of it is buried in the ground or the like. According to this feature, in the event of a tsunami, the exterior wall portion of the buried portion is less likely to be affected by the tsunami, which reduces construction costs for the exterior wall and foundation work. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing a tsunami shelter in Example 1. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 3] 3 is a cross-sectional view of FIG. 2 taken along line B-B. [Figure 4] This is an illustration showing a tsunami shelter being exposed to a tsunami. [Figure 5] This is an illustration showing the state where the water level around a tsunami shelter has dropped and sediment has accumulated around it. [Figure 6] This is a diagram showing the state in which the shelter body is separated upward from the outer wall portion in Example 1. [Figure 7] FIG. 10 is a perspective view showing a tsunami shelter in accordance with a second embodiment. [Figure 8] 8 is a cross-sectional view taken along CC in FIG. 7. [Figure 9] A diagram showing the state in which the shelter body is separated upward from the outer wall portion in Example 2. [Figure 10] This is a side cross-sectional view showing a first modified example of a tsunami shelter. [Figure 11] A side cross-sectional view showing a second modified example of a tsunami shelter. [Figure 12] This is a perspective view showing a third modified example of a tsunami shelter. [Figure 13] FIG. 10 is a partially enlarged plan view showing a third modified example of a tsunami shelter. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A tsunami shelter according to the present invention will be described below with reference to the following examples. [Example]

[0021] A tsunami shelter according to a first embodiment will be described with reference to Figures 1 to 6. Reference numeral 1 in Figure 1 denotes a tsunami shelter (hereinafter referred to as the shelter) to which the present invention is applied. The shelter 1 is an evacuation shelter that is mainly placed near a residence (not shown) built along the coast, and is mainly composed of a shelter main body 2 and an outer wall portion 3 that supports the shelter main body 2.

[0022] As shown in Figure 2, the shelter body 2 is integrally formed mainly from fiber-reinforced plastic, has a dome-shaped upper end that is roughly bell-shaped, and is roughly circular in plan view. The shelter body 2 has horizontal floorboards 4 at the bottom, and a living space S is formed above the floorboards 4.

[0023] Additionally, a cylindrical portion 5 extends downward from the outer edge of the floorboard 4, and the hollow space of the cylindrical portion 5 communicates with the living space S. The opening at the lower end of this cylindrical portion 5 forms an entrance / exit 6 for the living space S. The living space S of the shelter main body 2 is airtight with no vents other than this entrance / exit 6.

[0024] The floor boards 4 are provided above the lower end 7a of the peripheral wall 7, and the shelter body 2 has a raised floor structure with space available above the floor boards 4. An opening 8 is formed in a portion of the circumferential direction of the peripheral wall 7. The opening 8 is formed near the entrance 6, below the floor boards 4, and opens up to the lower end 7a of the peripheral wall 7.

[0025] A convex rib portion (convex portion) 9 is formed in the vertical center of the peripheral wall portion 7. Although not shown here, the convex rib portion 9 has a longitudinal direction along the circumferential direction. In addition, a protrusion 11 that protrudes outward is formed in the vertical center of the peripheral wall portion 7, spaced apart from the convex rib portion 9 in the circumferential direction.

[0026] A handle-shaped suspended support part 12 is provided at the upper end of the shelter body 2. A crane hook or the like of a crane, which will be described later, can be hooked onto the suspended support part 12.

[0027] The outer wall 3 is mainly made of reinforced concrete. The outer wall 3 comprises an endless annular upright portion 13 with an upper opening 3a, a flange portion 14 extending outward from the lower end of the upright portion 13, and an approach portion 15. A communication opening 16 is formed in part of the circumferential direction of the upright portion 13. The inner edge shape of the upright portion 13 is approximately the same as the outer edge shape of the peripheral wall portion 7 of the shelter main body 2, and is formed slightly larger than the peripheral wall portion 7 of the shelter main body 2. In other words, the shelter main body 2 is loosely fitted inside the upright portion 13 of the outer wall 3.

[0028] As shown in FIG. 3 , the upright portion 13 of the outer wall portion 3 has a support portion 17 protruding from a portion of the inner peripheral surface in the circumferential direction. The support portion 17 has a length along the circumferential direction, and is designed to rest on a convex rib portion 9 formed on the peripheral wall portion 7 of the shelter main body 2. In other words, the load of the shelter main body 2 is supported by the support portion 17 of the outer wall portion 3 via the convex rib portion 9. Note that instead of the convex rib portion 9 having a length in the circumferential direction, the shelter main body 2 may be provided with a plurality of convex portions spaced apart in the circumferential direction of the peripheral wall portion 7. Similarly, instead of the support portion 17 having a length in the circumferential direction of the upright portion 13, the outer wall portion 3 may be provided with a plurality of convex portions spaced apart in the circumferential direction.

[0029] Furthermore, a locking portion 18 is formed on the upright portion 13 of the outer wall portion 3, circumferentially spaced from the ridge portion 9, on a portion of the inner peripheral surface. The locking portion 18 is composed of a pair of guide portions 18a, 18a extending parallel to each other in the vertical direction of the inner peripheral surface. The guide portions 18a, 18a are spaced apart from each other by a distance slightly larger than the circumferential dimension of the protrusion 11 formed on the peripheral wall portion 7 of the shelter main body 2, and the protrusion 11 is positioned between the guide portions 18a, 18a to position the relative phase between the shelter main body 2 and the outer wall portion 3. In other words, the protrusion 11 and the locking portion 18 function as a rotation restriction means for the shelter main body 2 and the outer wall portion 3. Note that if the shelter main body 2 is not circular in plan view, the protrusion 11 and the locking portion 18 constituting this rotation restriction means may be omitted.

[0030] When the relative phase of the shelter main body 2 and the outer wall portion 3 is positioned by the rotation restriction means described above, the communication opening 16 formed in the upright portion 13 of the outer wall portion 3 and the opening 8 in the peripheral wall portion 7 of the shelter main body 2 overlap, making it possible to evacuate from outside the shelter 1 to inside the living space S through these communication opening 16, opening 8, and entrance / exit 6. In addition, by positioning these communication opening 16, opening 8, and entrance / exit 6 in a communicating state by the rotation restriction means, it is also possible to quickly escape from the tsunami shelter.

[0031] The approach section 15 is composed of three wall sections 15a that are U-shaped in plan view and are arranged to surround the communication opening 16 formed in the upright section 13 of the outer wall section 3. The side ends of the pair of left and right wall sections 15a are integrally continuous with the upright section 13, and the lower ends of the three wall sections 15a are integrally continuous with the flange section 14. In addition, a ladder 15b is provided on one of the wall sections 15a that make up the approach section 15.

[0032] Both ends of a mooring member 20 are attached to the anchor hook 19 fixed to the upper end 13a of the upright portion 13 of the outer wall portion 3 and to the suspended support portion 12 provided at the upper end of the shelter main body 2. In other words, the mooring member 20 constitutes a connecting device that connects the upper end 13a of the outer wall portion 3 and the upper end of the shelter main body 2.

[0033] The mooring member 20 is configured with carabiners 20a, 20a on both ends of a chain, and the carabiners 20a, 20a can be attached to and detached from the anchor hook 19 and the suspended support part 12. The mooring member 20 is attached to the anchor hook 19 at the upper end of the standing part of the outer wall part 3 and the suspended support part 12 provided at the upper end of the shelter main body 2, and rescue workers (described later) can attach and detach the carabiners 20a, 20a from above the standing part 13.

[0034] As shown in Figure 2, the outer wall section 3 is installed by burying the flange section 14 in the ground. This allows the outer wall section 3 to be firmly attached to the ground, making it less likely to be washed away by a tsunami. At this time, the outer wall section 3 is buried to a depth where the upper end of the wall section 15a of the approach section 15 is exposed above ground. Furthermore, by driving foundation piles into the ground using holes 14a (see Figure 1) formed in the flange section 14, the outer wall section 3 is made even more resistant to being washed away by a tsunami.

[0035] As described above, the structure having the living space and the protective structure are constructed separately, so that construction of the shelter 1 does not require much time or effort, including the cost of the structure.

[0036] Next, we will explain what happens when a tsunami actually hits. Here, we will assume that the incoming wave that first reaches shelter 1 hits from the right side of the screen in Figure 4, and that the outgoing wave, which is the water that flows over shelter 1 and then returns after a period of time, hits shelter 1 from the left side of the screen in Figure 4.

[0037] When users become aware of an approaching tsunami due to a tsunami warning or the like, they evacuate into the living space S through the communication opening 16 formed in the rising part of the outer wall 3, the opening 8 in the peripheral wall 7 of the shelter main body 2, and the entrance / exit 6 formed in the floor board 4.

[0038] The incoming waves of the tsunami that reach the shelter 1 and the returning backwash hit the strong upright portions 13 of the outer wall portion 3, preventing damage and destruction to the main body of the shelter 2 installed inside the upright portions 13. Furthermore, because the upright portions 13 of the outer wall portion 3 are circular in plan view, no matter which direction the incoming waves coming from the sea side or the backwash waves returning from the mountain side hit, the water flow is split into two directions by the upright portions, attenuating the force of the incoming waves of the tsunami that directly acts on the shelter 1, reducing the fluid resistance of the water and reducing the possibility of damage and destruction to the outer wall portion 3 itself.

[0039] As shown in Figure 2, the entrance to the shelter body 2 is formed below the floorboards 4, and occupants evacuate to the habitable space S from below the entrance 6. The habitable space S does not have any ventilation holes except for the entrance 6, so its internal air remains trapped and does not escape to the outside. Therefore, as shown in Figure 4, even if the habitable space S is submerged below the floorboards 4, the internal air in the habitable space S is compressed to a certain extent, increasing the air pressure and countering the water pressure of the infiltrating water. This prevents the water level from exceeding the entrance 6 and flooding the habitable space S. Therefore, evacuees are not continuously exposed to water and do not lose body heat directly. In addition, the tip of the tubular portion 5 extending downward from the floorboards 4 of the habitable space S forms the entrance 6, and the floorboards 4 constituting the habitable space S are positioned reliably above the entrance 6, further reliably preventing flooding of the habitable space S.

[0040] Furthermore, since the space surrounded by the upright portion 13 of the outer wall portion 3, i.e., the space supporting the shelter main body 2, is open downward, seawater that flows between the shelter main body 2 and the upright portion 13 of the outer wall portion 3 can be quickly discharged into the ground.

[0041] Furthermore, even if the shelter body 2 temporarily floats up due to buoyancy when the water level rises, the upper end 13a of the outer wall 3 and the upper end of the shelter body 2 are connected by the mooring members 20, so the shelter body 2 remains moored and does not detach from the outer wall 3. Depending on the length of the mooring members 20, it is also possible to completely prevent the shelter body 2 from moving upward relative to the outer wall 3.

[0042] Furthermore, since the protrusion 11 formed on the peripheral wall portion 7 of the shelter main body 2 is positioned between the guide portions 18a, 18a formed on the inner surface of the rising portion 13 of the outer wall portion 3, rotation between the shelter main body 2 and the outer wall portion 3 is restricted, so that the shelter main body 2 does not rotate relative to the outer wall portion 3 when a tsunami strikes, resulting in excellent livability in the living space S.

[0043] Figure 5 shows the state of the tsunami after about three hours have passed since the first wave, and sediment carried by the tsunami has piled up around Shelter 1.

[0044] It is preferable that users notify rescue teams of their location by sending a distress signal using a communication terminal or the like in the living space. After confirming the presence of the shelter 1, the rescue team first disengages the carabiners 20a, 20a (see Figure 1) of the mooring member 20 from at least one of the anchor hook 19 and the suspended support part 12. Next, the crane hook CF of the crane C is hooked onto the suspended support part 12 at the upper end of the shelter main body 2 and lifted up. This allows the shelter main body 2 to be separated upward from the outer wall part 3, and the users can safely escape through the entrance / exit 6 of the shelter main body 2.

[0045] At this time, the guide portions 18a, 18a of the outer wall portion 3 that constitute the rotation restriction means are long in the vertical direction, so when the shelter main body 2 is lifted, the protrusion portion 11 of the shelter main body 2 is guided into the guide portions 18a, 18a. Therefore, when the shelter main body 2 is lifted, it does not rotate relative to the outer wall portion 3, preventing adverse effects such as occupants in the living space falling over or feeling ill.

[0046] In addition, the load of the shelter main body 2 is supported by the support portion 17 of the outer wall portion 3 via the convex rib portion 9 located in the vertical center of the peripheral wall portion. In other words, the shelter main body 2 is supported with the lower end 7a of the peripheral wall portion 7 floating above the outer wall portion 3. Therefore, regardless of the vertical height dimension of the outer wall portion 3 required to bury it sufficiently underground, the living space S can be positioned at a higher position relative to the outer wall portion 3.

[0047] Additionally, the shelter body 2 is characterized in that its upper end is installed inside the outer wall 3 so as to be located lower than the upper end 13a of the outer wall 3. Therefore, the outer wall 3, which is supported by the ground, can reliably protect the shelter body 2 from the pressure of the tsunami and the collision of floating objects such as rubble swept away by the tsunami.

[0048] Because the exterior wall 3 is made of reinforced concrete, it can be constructed using simple methods to give it the strength to withstand the pressure of a tsunami, as well as debris swept away by the tsunami, collisions with buildings and ships, etc. In contrast, because the shelter body 2 is mainly made of fiber-reinforced plastic, it can be made lightweight, and the external force required to separate it upward can be reduced. Because the exterior wall 3 and the shelter body 2 can be formed with a simple structure in this way, the shelter 1 can be quickly constructed in areas where the impact of a tsunami is a concern. [Example]

[0049] A tsunami shelter according to a second embodiment will be described with reference to Figures 7 to 9. Note that the same components as those in the first embodiment will be given the same reference numerals and redundant description will be omitted.

[0050] In the shelter 21 shown in FIG. 7, an elongated opening 26 extending in the vertical direction is formed in a part of the circumferential direction of the upright portion 13 of the outer wall portion 23.

[0051] 8, the lower end of the upright portion 13 of the outer wall portion 23 is provided with a bottom surface portion 25, which extends to the outside of the upright portion 13, with the outer portion of the upright portion 13 constituting a flange portion 24. A support post 27 that stands upright in the vertical direction is provided approximately in the center of the bottom surface portion 25. The support post 27 has a screw thread on its outer circumferential surface, and a rotating member 28 is screwed into it.

[0052] The rotating member 28 has a support part 28a that is arranged below the floor board 4 of the shelter main body 22, and an operating part 28b that is arranged inside the living space of the shelter main body 22, and has a bearing 29 between the support part 28a and the underside of the floor board 4. In more detail, the rotating member 28 is arranged to pass through a hole 4a formed in the floor board 4 of the shelter main body 22. Although not shown here, the hole 4a formed in the floor board 4 of the shelter main body 22 and the rotating member 28 are able to rotate relative to each other while maintaining a sealed state using a mechanical seal or the like.

[0053] When the user rotates operating part 28b of rotating member 28, for example, in the reverse direction, the position where rotating member 28 engages with the threads of support 27 moves, causing shelter body 22 to rise. At this time, opening 26 formed in upright part 13 of outer wall 23 is an elongated hole extending vertically, so opening 26 always communicates with opening 8 in peripheral wall 7 of shelter body 22, even when shelter body 22 rises to the top end.

[0054] This allows users to escape on their own by moving the opening 8 in the peripheral wall 7 of the shelter body 22 and the entrance / exit 6 formed in the floor board 4 of the living space S to a position higher than the soil and sand piled up around the shelter 21. Furthermore, even if the soil and sand has piled up above the upper end of the opening 26 formed in the rising part 13 of the outer wall 23, by raising the shelter body 22, the soil pressure of the soil and sand around the opening 8 and opening 26 is reduced, making it easy to manually move the soil and sand away.

[0055] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

[0056] The outer wall 3 and the outer wall 23 may have a divided structure. For example, as in a first modified example shown in Fig. 10, the outer wall 33 may be formed by arranging multiple divided bodies 330, each having a bottom portion 331 and an upright portion 332 that are orthogonal to each other, in a ring shape, and fixing each bottom portion 331 to a disk-shaped bottom body 34. In this configuration, the upright portions of the divided bodies 330 form the upright portions 130 of the outer wall 33, and the bottoms of the divided bodies 330, together with the bottom body 34, form the flange portion 140 of the outer wall 33. The bottom body 34 has a drainage hole 34a that penetrates vertically.

[0057] 11, multiple shelter bodies 42 may be supported by one outer wall 43. Multiple openings 46 are formed in the upright portions 230 of the outer wall 43, and multiple grooves 45 are formed on the inside of opposing upright portions 230. The shelter body 42 has protrusions 44, 44 that engage in a pair of opposing grooves 45, 45 in the vertical direction, preventing adjacent shelter bodies 42 from colliding with each other.

[0058] 12 and 13, the outer wall portion 53 may be formed by erecting a plurality of metal plates 530, such as sheet piles, on a bottom body 54. In this third modification, the bottom body 54 is made of concrete, and the plurality of plates 530 are thrust into the bottom body 54 when the bottom body 54 is poured, thereby fixing the plates 530 integrally to the bottom body 54. As shown in FIG. 13, convex portions 42a extending in the vertical direction are provided at a plurality of locations on the outer circumferential surface of the shelter main body 52, and these convex portions 42a are spaced apart in the circumferential direction and can abut against the side ends of adjacent plates 530, thereby forming a rotation restriction means.

[0059] The bottom body 54 may be omitted, and the plate body 530 may be directly buried and supported in the hardened ground.

[0060] Furthermore, the exterior wall portion of the above-mentioned embodiment is not limited to a configuration in which it is buried underground and supported by the ground, but may also be configured to be supported and fixed to an existing structure on the ground or on the roof of a building using bolts or the like.

[0061] Furthermore, the exterior walls are not limited to being made of reinforced concrete, but may be made of, for example, metal or synthetic resin, etc. Similarly, the shelter body is not limited to being made of fiber-reinforced plastic, but may be made of, for example, metal or another translucent resin material, and if a translucent material is used, it is possible to take in light from outside the shelter.

[0062] Furthermore, the shelter body and the outer wall portion are not limited to being approximately circular when viewed from above, but may be, for example, elliptical or rectangular, and the shelter body and the outer wall portion are not limited to being the same shape when viewed from above.

[0063] The structure of the shelter body 2 is not limited as long as it is configured so that at least the upper portion is sealed and a living space is secured inside. For example, multiple entrances and exits may be formed below the living space. [Explanation of symbols]

[0064] 1. Shelter 2. Shelter body 3 Exterior wall 3a Top opening 4 Floorboards 5 Cylindrical part 6 Entrance / exit 7 Peripheral wall 7a Bottom end 8 aperture 9 Convex portion 11 Protrusion 12 Hanging branch 13 Standing part 13a Upper end 14 Flange 15 Approach section 15a wall 15b ladder 16 Connecting port 17 Support part 18 Locking part 18a,18a Information section 19 Anchor Hook 20 Mooring member 20a, 20a carabiner 21 Shelter 22 Shelter body 23 Exterior wall 24 Flange 25 Bottom part 26 Aperture 27 Pillar 28 Rotating member 28a Support part 28b Operation section 29 Bearings 33 Exterior wall 34a hole 34 Bottom body 42 Shelter body 43 Exterior wall 44,44 convex part 45 Groove 46 Aperture 52 Shelter body 52a Convex part 53 Exterior wall 54 Bottom body 130 Standing part 140 flange 230 Standing part 330 Split body 331 Bottom 332 Standing part 332 Bottom 530 Plate C Crane CF Crane Hook S Living space

Claims

1. The shelter comprises a shelter body that is sealed at least at the upper position and can secure a living space inside, and an outer wall portion that surrounds the periphery of the shelter body and interferes with the mechanical influence on the shelter body by at least the water force and floating objects generated by the tsunami, A tsunami shelter characterized in that the outer wall portion is supported by the ground or the like, and the shelter body and the outer wall portion are constructed as separate structures.

2. A communication port is formed in the outer wall portion so as to penetrate laterally, The shelter body has an entrance formed at the lower side of the living space, A tsunami shelter as described in claim 1, characterized in that the communication opening in the outer wall portion and the entrance / exit of the shelter body are positioned in a communicating state.

3. 2. A tsunami shelter as described in claim 1, characterized in that the shelter body is installed inside the outer wall portion so as to be movable in the vertical direction relative to the outer wall portion.

4. A tsunami shelter as described in claim 1, characterized in that the shelter body is installed inside the outer wall portion so that it can move up and down relative to the outer wall portion but cannot rotate.

5. A tsunami shelter as described in claim 3, characterized in that the outer wall portion and the shelter main body are connected by a connecting device that can be engaged and disengaged.

6. 2. A tsunami shelter as described in claim 1, characterized in that the outer wall portion has a flange portion extending outward at its lower end.

7. 2. A tsunami shelter as described in claim 1, characterized in that the outer wall portion has an open bottom of the shelter body, allowing water to flow downward.

8. 2. A tsunami shelter as described in claim 1, wherein the upper part of the shelter body is dome-shaped.

9. 2. A tsunami shelter as described in claim 1, characterized in that the shelter body is installed inside the outer wall portion so that its upper end is located lower than the upper end of the outer wall portion.

10. A tsunami shelter as described in claim 1, characterized in that the shelter body has a cylindrical portion extending downward from the floor board of the living space, the tip of which forms the entrance / exit.

11. The outer wall portion is mainly formed of concrete, A tsunami shelter as described in any one of claims 1 to 10, characterized in that the shelter body is mainly made of synthetic resin and has a hanging support part at the top.

12. 11. A tsunami shelter according to claim 1, wherein the outer wall portion is installed in a state where at least a part of the outer wall portion is buried in the ground or the like.

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