Installation structure of escape hatches

Abstract

To suppress generation of rattling or rapture of a sealant when an evacuation hatch is installed on an outdoor floor part and maintain a good installation state of the evacuation hatch.SOLUTION: An evacuation hatch 10 has an expansion part 12 that expands toward a lateral side and is mounted on an outdoor floor part 3. The outdoor floor part 3 has a support face 15 with which the expansion part 12 of the evacuation hatch 10 is in contact so as to support the evacuation hatch 10. The evacuation hatch 10 is fitted in an opening 4 and the expansion part 12 is mounted on the support face 15 of the outdoor floor part 3 from above. Movement suppressing means 12b, 50, 58 suppress movement of the evacuation hatch 10 in a lateral direction orthogonal to a direction in which the expansion part 12 is mounted on the support face 15 of the outdoor floor part 3.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to an installation structure of an evacuation hatch.

Background Art

[0002] In recent years, buildings with four or more floors have been constructed as wooden buildings. When constructing a building with four or more floors as a wooden building, it is essential not only to provide the necessary seismic resistance, fire resistance, and waterproof performance, but also to install evacuation facilities in outdoor areas such as balconies and outdoor corridors to ensure an evacuation route from upper floors. Patent Document 1 discloses a technique in which an annular mounting frame member is attached around a hatch mounting opening formed in a balcony floor of a wooden building, and an evacuation hatch is placed on the mounting frame member and fixed by a fixing member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When fixing a conventional evacuation hatch to a balcony floor, a cylindrical main body frame is fixed to a mounting frame member by a fixing member such as a screw. At that time, the fixing member has a wooden filling member interposed between the cylindrical main body frame and the balcony floor side. Therefore, if the filling member shrinks due to aging or the like and a gap occurs between the evacuation hatch and the balcony floor side, rattling is likely to occur when the evacuation ladder is lifted or lowered or when someone stands on the upper lid of the evacuation hatch, or the sealing material provided at the upper and lower ends of the evacuation hatch is likely to break.

[0005] This invention has been made in view of the above circumstances, and its objective is to suppress rattling and cracking of the sealing material when an escape hatch is installed on an outdoor floor, and to maintain a good installation condition for the escape hatch. [Means for solving the problem]

[0006] The invention described in claim 1 is, for example, shown in Figures 1, 11, and 1 8 As shown, an escape hatch 10 to which an escape ladder 13 that extends downwards is attached, An outdoor floor section 3 is formed in which an opening 4 into which the escape hatch 10 is fitted, The system includes movement restraining means 12b, 50, 58 that restrain the movement of the escape hatch 10 fitted into the opening 4, The escape hatch 10 is equipped with an overhang 12 that extends laterally and rests on the outdoor floor 3. The aforementioned outdoor floor section 3 is Support portion 40 arranged along the edge of the opening 4 Equipped with, Of the support portion 40, the upper surface is The protruding portion 12 of the escape hatch 10 is in contact with and the support surface 15 supports the escape hatch 10. The outer surface of the support portion 40 opposite to the opening 4 is the contact surface to which the movement-restricting means 12b, 50, and 58 come into contact and the movement of the escape hatch 10 is restricted. The escape hatch 10 is fitted into the opening 4, and the protruding portion 12 is placed from above on the support surface 15 of the outdoor floor portion 3. The overhang portion 12 of the escape hatch 10 has a projection 12b that protrudes downward from its leading edge in the overhang direction, and this projection 12b is the movement-restricting means that contacts the outer surface of the support portion 40. The aforementioned movement restraining means 12b, 50, 58 The protruding portion 12b This is characterized by suppressing the movement of the escape hatch 10 in a lateral direction perpendicular to the direction in which the overhang portion 12 is placed on the support surface 15 of the outdoor floor portion 3.

[0007] According to the invention described in claim 1, the escape hatch 10 is fitted into the opening 4, and the protruding portion 12 that extends laterally is placed on the support surface 15 of the outdoor floor 3 from above. Thus, the escape hatch 10 can be supported from below by the outdoor floor 3, and the escape hatch 10 can be installed in a good condition. Furthermore, the escape hatch 10 is fitted into the opening 4, and the protruding portion 12 is placed on the support surface 15 of the outdoor floor 3 from above. The movement-restricting means 12b, 50, and 58 restrict the movement of the escape hatch 10 in the lateral direction perpendicular to the direction in which the protruding portion 12 is placed on the support surface 15 of the outdoor floor 3. As a result, the escape hatch 10 is in a state where lateral movement is restricted by the movement-restricting means 12b, 50, and 58 while a load is applied downwards. This suppresses rattling and cracking of the sealing material when the escape hatch 10 is installed on the outdoor floor 3, and maintains a good installation condition.

[0009] Also Since the outdoor floor section 3 has a contact surface where the movement-restraining means 12b, 50, and 58 come into contact and the movement of the escape hatch 10 is restrained, the escape hatch 10 is reliably restrained from moving by the outdoor floor section 3 via the movement-restraining means. Therefore, rattling and rupture of the sealing material when the escape hatch 10 is installed on the outdoor floor section 3 are suppressed, and a good installation condition can be maintained.

[0013] Also Since the upper surface of the support portion 40, which is positioned along the edge of the opening 4, is the support surface 15 that the protruding portion 12 of the escape hatch 10 contacts, the escape hatch 10 is fitted into the opening 4, and the laterally protruding portion 12 is placed on the support portion 40, thereby being supported from below by the outdoor floor portion 3, which contributes to the installation stability of the escape hatch 10. Furthermore, the outer surface of the support portion 40 opposite to the opening 4 is the contact surface, and the protruding portion 12 of the escape hatch 10 has a projection 12b that protrudes downward from its tip in the protruding direction, and this projection 12b is a movement-restricting means that contacts the outer surface of the support portion 40, so that the protruding portion 12 and the projection 12b can be hooked onto the support portion 40 as if by a hook, thereby suppressing the lateral movement of the escape hatch 10. This suppresses rattling and rupture of the sealing material when the escape hatch 10 is installed on the outdoor floor 3, and maintains a good installation condition.

[0014] Claim 2The invention described in [reference] is, as shown in FIGS. 1 and 19 for example, An escape hatch 10 to which an escape ladder 13 that extends downwards is attached, An outdoor floor section 3 is formed in which an opening 4 into which the escape hatch 10 is fitted, The system includes movement restraining means 12b, 50, 58 that restrain the movement of the escape hatch 10 fitted into the opening 4, The escape hatch 10 is equipped with an overhang 12 that extends laterally and rests on the outdoor floor 3. a portion along the edge of the opening 4 among the upper surface of the outdoor floor portion 3 is The protruding portion 12 of the escape hatch 10 is in contact with the support surface 15 that supports the escape hatch 10. set as The escape hatch 10 is fitted into the opening 4, and the protruding portion 12 the lower surface is The outdoor floor part supported by the outdoor floor portion 3 while being in contact with the support surface 15, a floor finishing material 21 is provided on the upper surface of the outdoor floor portion 3, the movement restraining means 58 is provided between the overhanging portion 12 and the floor finishing material 21, an end surface on the overhanging portion 12 side of the floor finishing material 21 is used as the contact surface The movement restraining means 12b, 50, 58 restrain the movement of the escape hatch 10 in a lateral direction perpendicular to the direction in which the overhang 12 is placed on the support surface 15 of the outdoor floor 3. and is characterized in that.

[0015] Claim 2 According to the invention described in [reference], The escape hatch 10 is fitted into the opening 4, and the protruding part 12 that extends laterally is placed on the support surface 15 of the outdoor floor 3 from above. This allows the escape hatch 10 to be supported from below by the outdoor floor 3, ensuring that the escape hatch 10 is properly installed. Furthermore, the escape hatch 10 is fitted into the opening 4, and the protruding portion 12 is placed on the support surface 15 of the outdoor floor 3 from above. The movement-restricting means 12b, 50, and 58 restrict the movement of the escape hatch 10 in the lateral direction perpendicular to the direction in which the protruding portion 12 is placed on the support surface 15 of the outdoor floor 3. As a result, the escape hatch 10 is in a state where lateral movement is restricted by the movement-restricting means 12b, 50, and 58 while a load is applied downwards. This suppresses rattling and cracking of the sealing material when the escape hatch 10 is installed on the outdoor floor 3, and maintains a good installation condition. Furthermore, since the outdoor floor section 3 has a contact surface where the movement-restraining means 12b, 50, and 58 come into contact and the movement of the escape hatch 10 is restrained, the escape hatch 10 is reliably restrained from moving by the outdoor floor section 3 via the movement-restraining means. As a result, rattling and rupture of the sealing material when the escape hatch 10 is installed on the outdoor floor section 3 are suppressed, and a good installation condition can be maintained. Also, A portion along the edge of the opening 4 among the upper surface of the outdoor floor portion 3 is used as the support surface 15, and the overhanging portion 12 of the escape hatch 10 is supported by the outdoor floor portion 3 while the lower surface is in contact with the support surface 15. Therefore, when the cylindrical main body frame 11 of the escape hatch 10 is fitted into the opening 4 and the overhanging portion 12 that projects sideways is placed on the support surface 15, the escape hatch 10 is supported from below by the outdoor floor portion 3, which can contribute to the installation stability of the escape hatch 10. Furthermore, a floor finishing material 21 is provided on the upper surface of the outdoor floor portion 3, and the movement suppressing means 58 is provided between the overhanging portion 12 and the floor finishing material 21. Since the end face of the floor finishing material 21 on the side of the overhanging portion 12 is the contact surface, the movement suppressing means 58 provided between the overhanging portion 12 and the floor finishing material 21 and the floor finishing material 21 can suppress the movement of the evacuation hatch 10 in the lateral direction orthogonal to the direction in which the overhanging portion 12 is placed on the support surface 15 of the outdoor floor portion 3. Thereby, it is possible to suppress the occurrence of rattling and the breakage of the sealing material when the evacuation hatch 10 is installed on the outdoor floor portion 3, and to maintain a good installation state.

Advantages of the Invention

[0016] According to the present invention, it is possible to suppress the occurrence of rattling and the breakage of the sealing material when the evacuation hatch is installed on the outdoor floor portion, and to maintain a good installation state of the evacuation hatch.

Brief Description of the Drawings

[0017] [Figure 1] It is a diagram for explaining the basic configuration related to the installation of the evacuation hatch. [Figure 2] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 3] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 4] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 5] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 6] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 7] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 8] It is a cross-sectional view showing a reference example related to the installation of the evacuation hatch. [Figure 9] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 10] It is a cross-sectional view showing an embodiment related to the installation of the evacuation hatch. [Figure 11]This is a cross-sectional view showing an embodiment of the installation of an escape hatch. [Figure 12] This is a cross-sectional view showing an embodiment of the installation of an escape hatch. [Figure 13] Figure 12 is a perspective view showing the fixed base member. [Figure 14] This is a cross-sectional view showing an embodiment of the installation of an escape hatch. [Figure 15] This is a cross-sectional view illustrating an embodiment of the installation of an escape hatch from a different perspective than that shown in Figure 14. [Figure 16] This is a cross-sectional view showing a reference example of the installation of an escape hatch. [Figure 17] Figure 16 is an enlarged cross-sectional view of the main part. [Figure 18] This is a cross-sectional view showing an embodiment of the installation of an escape hatch. [Figure 19] This is a cross-sectional view showing an embodiment of the installation of an escape hatch. [Figure 20] This is an elevation drawing of a building with an escape hatch installed. [Figure 21] This is a cross-sectional view illustrating an example of the placement of escape hatches. [Figure 22] This is a cross-sectional view illustrating an example of the placement of escape hatches. [Figure 23] This is a cross-sectional view showing an embodiment of the installation of an escape hatch. [Figure 24] Figure 23 is an elevation view of a building with an escape hatch installed. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are subject to various technically preferred limitations for carrying out the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

[0019] <Basic configuration> Figure 1 is a diagram illustrating the basic configuration related to the installation structure of the escape hatch 10. The escape hatch 10, which is an escape device, is located on the balcony 2 or outdoor corridor of a building 1 such as a house, on the indoor side of the handrail 2a, and is installed on an outdoor floor 3 that extends from the outer wall 5 of the building 1. An opening 4 is formed in the outdoor floor section 3, which serves as a through-hole that penetrates the outdoor floor section 3 in the thickness direction (vertical direction). The escape hatch 10 is installed by being fitted into this opening 4 from above. The outdoor floor area 3 on which the escape hatch 10 is installed is located at least on a floor above the first floor, and is not installed on the outdoor floor area 3 of the balcony 2 on the first floor.

[0020] The escape hatch 10 is entirely constructed of metal, such as stainless steel or steel plate. Such an escape hatch 10 includes a cylindrical main frame 11 that fits into the opening 4. The cylindrical main frame 11 is formed in a cylindrical shape with openings at the top and bottom, allowing people and objects to pass through in the vertical direction. Normally, the upper opening is closed by the top cover 11a, and the lower opening is closed by the bottom cover 11b.

[0021] The top cover 11a is a single-opening type cover and has sufficient rigidity to not deform even when a person stands on it. The lower cover 11b is also a single-opening cover and is connected to the upper cover 11a by a linkage device 11c. In other words, the lower cover 11b opens simultaneously with the opening of the upper cover 11a by the linkage device 11c and closes simultaneously with the closing of the upper cover 11a. The upper cover 11a is mandatory, but the lower cover 11b may be omitted, in which case the link device 11c will also be omitted.

[0022] Preferably, the central, prominent area 11z on the top surface of the lid 11a is printed with, for example, a photograph that gives viewers a sense of security (family photo), an illustration of a child's favorite character, or an illustration that gives viewers a sense of security. This can help alleviate some of the tension during evacuation and reduce anxiety. The area 11z on which photographs or illustrations are printed may also be located on the underside of the top cover 11a. This way, the area 11z will be visible when the top cover 11a is opened, creating a surprising effect that is likely to alleviate anxiety. Additionally, a display device may be provided in area 11z to show animations or videos that provide a sense of security to viewers.

[0023] The escape hatch 10 is equipped with a foldable escape ladder 13 that extends downward when in use. This escape ladder 13 is configured to allow for wire winding, and can be folded by winding the wire using the winding mechanism. The escape ladder 13 is attached to the inner surface of the cylindrical main frame 11.

[0024] Below the escape hatch 10 is a descent space 10a through which an escape ladder 13 is deployed and people descend. People using the balcony 2 on the lower floor must ensure that no obstacles are placed in the descent space 10a. In addition, an escape hatch 10 on the lower floor is not located directly below an escape hatch 10 on the upper floor. Furthermore, the descent space 10a refers to the space directly below the escape hatch 10.

[0025] The surface of the outdoor floor section 3 is finished by the finishing section 20. In other words, the finishing section 20 is a surface material / building material (i.e., a finishing material) used to finish the surface of the outdoor floor section 3, and is directly visible to the human eye. The finishing section 20 finishes at least the upper surface of the outdoor floor section 3, forming a floor finish surface 20a on the surface of the outdoor floor section 3. Examples of such finishing parts 20 include floor finishing material 21, which is a flooring material that finishes the upper surface of the outdoor floor part 3, and waterproof sheet 22, which is attached to the surface of the outdoor floor part 3.

[0026] In the case of the floor finishing material 21, only the upper surface of the outdoor floor section 3 is finished, and this upper surface of the floor finishing material 21 functions as the floor finishing surface 20a. The floor finishing material 21 is also supported by being placed on a base material (see, for example, base material 24a in Figure 6) provided on the upper surface of the outdoor floor section 3.

[0027] In the case of the waterproof sheet 22, it may be attached not only to the upper surface of the outdoor floor 3, but also to the surface of the opening 4, the surface of the exterior wall 5, and the surface of the handrail 2a. The upper surface of the portion of the waterproof sheet 22 that has been finished on the upper surface of the outdoor floor 3 will function as the floor finishing surface 20a.

[0028] Furthermore, if the outdoor floor section 3 is covered with a waterproof sheet 22 and the floor finishing material 21 is installed above it, the upper surface of the floor finishing material 21 becomes the floor finishing surface 20a. In that case, a base material is installed on the waterproof sheet 22, and the floor finishing material 21 is placed on and supported by the base material.

[0029] <Examples> The following describes examples and reference examples related to the installation of the escape hatch 10. The basic configuration described above and the examples and reference examples listed below may be combined as much as possible. In addition, elements common to the basic configuration described above and the examples and reference examples listed below are denoted by the same reference numerals, and explanations and illustrations are omitted or simplified as appropriate.

[0030] <Example 1> In this embodiment, as shown in Figure 2, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10A is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0031] To explain in more detail, first, the opening 4 formed in the outdoor floor section 3 is a rectangular through-hole with four sides. Furthermore, the cylindrical main frame 11 that constitutes the escape hatch 10A is formed in a rectangular tube shape corresponding to the shape of the opening 4 and has four sides, and is fitted into the opening 4.

[0032] Here, the escape hatch 10A is provided with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0033] The protruding portion 12 is integrally provided with respect to the cylindrical main frame 11. That is, the cylindrical main frame 11 and the protruding portion 12 may be formed by bending, or the protruding portion 12 may be joined to the cylindrical main frame 11 by welding or the like. Since the protruding portion 12 is integrally provided with respect to the cylindrical main frame 11, the entire escape hatch 10A is supported by the outdoor floor portion 3 when the protruding portion 12 is supported by the outdoor floor portion 3.

[0034] The outdoor floor section 3 is either entirely made of wood or includes wooden components. Such an outdoor floor section 3 includes a support section 3a provided along the edge of the opening 4. The support portion 3a is a convex portion that protrudes upward from the upper surface of the outdoor floor portion 3, and in this embodiment, it is integrally formed with the outdoor floor portion 3. The upper surface of the support portion 3a is the support surface 15 to which the protruding portion 12 of the escape hatch 10A contacts and which supports the escape hatch 10A. Furthermore, the surface of the outdoor floor section 3 is covered with a waterproof sheet 22. The area covered by the waterproof sheet 22 extends not only to the top surface of the outdoor floor section 3, but also to the surface of the convex support section 3a and the four sides of the opening 4.

[0035] In this embodiment, the floor finishing material 21, which is the finishing portion 20, is supported by a base material (not shown) provided on the upper surface of the waterproof sheet 22. The height position of the floor finishing surface 20a (upper surface of the floor finishing material 21) formed by this finishing portion 20 is set to be approximately equal to the height position of the upper surface of the top cover 11a of the escape hatch 10A.

[0036] The escape hatch 10A is installed such that the cylindrical main frame 11 is fitted into the opening 4 on the outdoor floor 3, and the protruding portion 12 rests on and is in contact with the support surface 15. Furthermore, this escape hatch 10A is fixed to the outdoor floor 3 by fixing means (not shown) while avoiding the wooden parts that make up the outdoor floor 3.

[0037] In this embodiment, the fixing means involves fixing the escape hatch 10A to the outdoor floor 3 while avoiding the wooden parts that make up the outdoor floor 3, but it is not limited to this. In other words, the escape hatch 10A may be fixed to the outdoor floor section 3 by driving fasteners such as screws into the wooden floor section (floor section 30, described later) that constitutes the outdoor floor section 3, after the necessary waterproofing treatment has been applied. Examples of waterproofing treatments here include providing a sealant adjacent to the area where the protruding section 12 and the support surface 15 come into contact, providing a sealant between the cylindrical frame 11 and the opening 4, or applying waterproof tape to the area where the fasteners penetrate.

[0038] The outdoor floor section 3 has its surface finished with a floor finishing material 21, which is the finishing section 20, forming a floor finishing surface 20a. The floor finishing surface 20a is located above the surface 12a (i.e., the lower surface 12a) of the overhang 12 of the escape hatch 10A that is in contact with the support surface 15 of the outdoor floor section 3.

[0039] According to this embodiment, when the escape hatch 10A is installed on the outdoor floor 3, the resulting step is minimized, improving the appearance of the outdoor floor 3 and reducing the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 is reduced as much as possible, thereby improving waterproofing.

[0040] <Example 2> In this embodiment, as shown in Figure 3, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10B is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0041] To explain in more detail, first, the escape hatch 10B is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0042] The protruding portion 12 is integrally provided with respect to the cylindrical main frame 11. That is, the cylindrical main frame 11 and the protruding portion 12 may be formed by bending, or the protruding portion 12 may be joined to the cylindrical main frame 11 by welding or the like.

[0043] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels. A building panel is constructed by assembling vertical and horizontal frame members 30a into a rectangular shape, and then assembling auxiliary cross members vertically and horizontally inside the rectangular frame to form a frame body. Face material 30b is attached to one or both sides of this frame body, resulting in a hollow internal structure. Furthermore, insulation material such as glass wool or rock wool is usually installed in the hollow internal portion. The main wall body of the exterior wall 5 is also constructed from similar building panels.

[0044] In this embodiment, the floor body 30 (wall body of the exterior wall 5) is made of building panels, but it is not limited to this. In other words, in this embodiment, the building 1 has a floor with an outdoor floor section 3 and the floor directly below it constructed at least by a so-called panel construction method. However, it may also be constructed by other conventionally known construction methods such as a post-and-beam construction method, a wall construction method, or a two-by-four construction method. In that case, since no building panels are used, the floor body 30 is made up of joists and floorboards.

[0045] The outdoor floor section 3 has a rectangular opening 4 into which an escape hatch 10B is fitted. That is, a rectangular opening is formed in the floor body 30 by assembling multiple frame members 30a, and this opening is the opening 4 of the outdoor floor section 3.

[0046] The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30. This surface layer includes, for example, a fire-resistant surface material 31 made of gypsum board, an insulating panel 32 made of, for example, Styrofoam (registered trademark), a first base plywood 33, a second base plywood 34, and so on. In addition, it may also include a waterproof sheet 22 when not used as a finishing part 20, and, for example, a flashing material 33a and soffit material 35 as shown in Figure 11.

[0047] To describe the surface layer in detail, the floor body 30 is covered on its top and bottom surfaces and the side of the opening 4 by a double layer of fire-resistant material 31. The upper end surface of the fire-resistant material 31 on the side of the opening 4 is flush with the top surface of the floor body 30, and the lower end surface is flush with the lower surface of the double layer of fire-resistant material 31 covering the bottom surface of the floor body 30. The double layer of fire-resistant material 31 covering the top surface of the floor body 30 is positioned across the top surface of the floor body 30 and the upper end surface of the double layer of fire-resistant material 31 on the side of the opening 4, and the end surface on the opening 4 side is flush with the surface of the double layer of fire-resistant material 31 on the side of the opening 4 (the surface on the opening 4 side).

[0048] An insulating panel 32 is provided on top of the fire-resistant surface material 31 that covers the upper surface of the floor body 30, avoiding the opening 4. Of the insulation panels 32, the insulation panels 32 provided on the outer perimeter of the outdoor floor section 3 are insulation panels 32 with a sloped upper surface, which allows for easy formation of a water slope on the outdoor floor section 3. On the other hand, the standard insulation panel 32 provided on the central side of the outdoor floor section 3 has an upper surface that is approximately horizontal (it may also be a very gently sloping surface), making it easier to install the escape hatch 10B horizontally.

[0049] A first base plywood 33 is provided on the surface side of the fire-resistant material 31 that covers the opening 4 side of the floor body 30, and a second base plywood 34 is provided on the surface side of the fire-resistant material 31 that covers the upper surface of the floor body 30. As described above, an insulation panel 32 is provided on top of the fire-resistant material 31 that covers the upper surface of the floor body 30, so the second base plywood 34 is provided on top of the insulation panel 32 (insulation panel 32 with water slope and ordinary insulation panel 32). Furthermore, the upper end of the first base plywood 33 and the side end of the second base plywood 34, which is installed on top of the normal insulation panel 32, on the side facing the opening 4 are adjacent, and the upper surface of the first base plywood 33 and the upper surface of the second base plywood 34 are flush.

[0050] As described above, the first and second plywood panels 33 and 34 are adjacent to each other, so their surfaces are continuous. The waterproof sheet 22 is then continuously attached to the surfaces of the first and second plywood panels 33 and 34. The waterproof sheet 22 is also attached to the surface side of the exterior wall 5, and is in a continuous state with the waterproof sheet 22 on the outdoor floor 3 side. Furthermore, exterior wall finishing materials are appropriately applied to the surface side of the waterproof sheet 22 attached to the surface side of the exterior wall 5.

[0051] A floor finishing material 21, which is the finishing part 20, is provided on top of the second base plywood 34 (on top of the waterproof sheet 22). A base material (not shown) is provided between the second base plywood 34 (waterproof sheet 22) and the floor finishing material 21. The upper surface of this floor finishing material 21 is a very gently sloping surface formed toward the periphery of the outdoor floor part 3. The floor finishing material 21 is positioned to avoid the opening 4 and the top cover 11a of the escape hatch 10B, and its dimensions are set so that there is no large gap between it and the escape hatch 10B. Furthermore, the outer edge of the floor finishing material 21 is a grating section 21a, so that water flowing on the upper surface of the floor finishing material 21 flows downward from the grating section 21a.

[0052] Such an outdoor floor section 3 includes a support section 40 provided along the edge of the opening 4. In this embodiment, the support portion 40 includes a support rail 40a provided so as to surround the opening 4, and a sealing material 40b provided along the outer surface of the support rail 40a. Furthermore, the upper surface of the support rail 40a is the support surface 15 that contacts the protruding portion 12 of the escape hatch 10B and supports the escape hatch 10B. The sealing material 40b is filled into the recess surrounded by the waterproof sheet 22 on the upper surface, the outer surface of the support rail 40a, and the lower surface of the protruding portion 12.

[0053] The escape hatch 10B is installed such that the cylindrical main frame 11 is fitted into the opening 4 on the outdoor floor 3, and the protruding portion 12 rests on and is in contact with the support surface 15. Furthermore, the escape hatch 10B is fixed to the outdoor floor 3 by a fixing means (not shown). In this embodiment, the fixing means is designed to fix the escape hatch 10B to the outdoor floor 3 while avoiding the wooden parts that make up the outdoor floor 3, but it is not limited to this.

[0054] The outdoor floor section 3 has its surface finished with a floor finishing material 21, which is the finishing section 20, forming a floor finishing surface 20a. The floor finishing surface 20a is located above the surface 12a (i.e., the lower surface 12a) of the overhang 12 of the escape hatch 10B that is in contact with the support surface 15 of the outdoor floor section 3.

[0055] In this embodiment, the floor finishing material 21, which is the finishing part 20, is supported by a base material (not shown) provided on the upper surface of the waterproof sheet 22, as described above. However, in this embodiment, the floor finishing material 21 is further placed on the upper surface of the overhang 12 of the escape hatch 10B. In other words, the floor finishing material 21, which is the finishing part 20, is placed on the upper surface of the overhang 12 and is supported by the overhang 12 and a base material (not shown) provided on the upper surface of the waterproof sheet 22. Furthermore, in this embodiment, an upper cover 11a is provided above the protruding portion 12 of the escape hatch 10B, and the thickness of the floor finishing material 21, which is the finishing portion 20, is set to be approximately equal to the thickness of this upper cover 11a. The height position of the floor finishing surface 20a (upper surface of the floor finishing material 21) formed by the finishing portion 20 is set to be approximately equal to the height position of the upper surface of the upper cover 11a of the escape hatch 10B.

[0056] According to this embodiment, when the escape hatch 10B is installed on the outdoor floor 3, the resulting step is minimized, improving the appearance of the outdoor floor 3 and reducing the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 is reduced as much as possible, thereby improving waterproofing.

[0057] <Example 3> In this embodiment, as shown in Figure 4, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10C is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by a finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a waterproof sheet 22. In this embodiment, a second waterproof sheet 23 is used to finish the edges, so the waterproof sheet 22 which is the finishing section 20 is referred to as the first waterproof sheet 22. The finishing section 20 may refer to both the first waterproof sheet 22 and the second waterproof sheet 23.

[0058] To explain in detail with reference to Figure 4(a), first, the escape hatch 10C is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0059] The protruding portion 12 is an L-shaped angle material and consists of a plate portion that contacts the side surface of the cylindrical main frame 11 and a plate portion that protrudes laterally. The plate portion that contacts the side surface of the cylindrical main frame 11 is joined to the cylindrical main frame 11 by welding or the like and is provided as a single unit.

[0060] Furthermore, the escape hatch 10C in this embodiment is integrally provided with the upper end of the cylindrical main frame 11 and further includes an extension portion 14 having four sides that are wider than the four sides of the cylindrical main frame 11. This extension portion 14 protrudes laterally beyond the sides of the cylindrical main frame 11, and its protrusion dimension is set to be shorter than the protrusion dimension of the extension portion 12.

[0061] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels as described above. The floor body 30 is covered on its top and bottom surfaces and the sides of the opening 4 by two layers of fire-resistant material 31. Furthermore, on top of the fire-resistant surface material 31 covering the upper surface of the floor body 30, a floor underlayment is provided, which is part of the surface layer and serves as the base for the first waterproof sheet 22 (second waterproof sheet 23), which is the finishing part 20 in this embodiment. This floor underlayment includes a fixing frame material 36, an insulation panel 32, a first base material 37, a second base material 38, and the like.

[0062] Furthermore, the outdoor floor section 3 is equipped with a support section 41 provided along the edge of the opening 4. In this embodiment, the support portion 41 is composed of a support rail 41 that is provided so as to surround the opening 4. The upper surface of the support rail 41, which is the support part 41, is the support surface 15 that the overhang portion 12 of the escape hatch 10C contacts and supports the escape hatch 10C. The overhang portion 12 is placed on the support surface 15 of the upper surface of the support rail 41 and fixed by fasteners 41a such as screws. These fasteners 41a are a means of fixing the overhang portion 12 of the escape hatch 10C to the support rail 41 of the outdoor floor part 3 while avoiding the wooden part (floor body 30) that constitutes the outdoor floor part 3. The overhang portion 12 may also have through holes through which the fasteners 41a pass.

[0063] The fixing frame members 36 in the above-mentioned floor subfloor are provided adjacent to and surrounding the support rails 41. The fixing frame members 36 are fixed to the floor body 30 by fixing frame members 36 that are long enough to reach the frame members 30a of the floor body 30 via a fire-resistant surface material 31 that covers the upper surface of the floor body 30. Furthermore, the fixing frame member 36 is set to be higher than the support rail 41 and to be the same height as the insulation panel 32. The height of the upper surface of the fixing frame member 36 and the insulation panel 32 is located above the height of the upper surface of the overhang 12 when the overhang 12 is placed on the support surface 15, which is the upper surface of the support rail 41. The first base material 37 is provided on the upper surface of the insulation panel 32 and joined to it, and the second base material 38 is provided on the upper surface of the fixing frame material 36 and joined to it. The second base material 38 protrudes from the fixed frame material 36 in the direction of the escape hatch 10C and is located above the overhang 12, with its protruding tip in contact with the side surface of the cylindrical main frame 11.

[0064] The first waterproof sheet 22 is then attached to the upper surfaces of the first base material 37 and the second base material 38. In other words, the first waterproof sheet 22 is attached across the upper surfaces of the first base material 37 and the second base material 38. It is preferable that the end portion of the first waterproof sheet 22 on the escape hatch 10C side be positioned as close to the escape hatch 10C as possible. The second waterproof sheet 23 is attached in an L-shape below the extension portion 14 which is integrally provided at the upper end of the cylindrical main frame 11, straddling the side surface of the cylindrical main frame 11 and the end portion of the first waterproof sheet 22.

[0065] In the example shown in Figure 4(a), the upper surface of the first waterproof sheet 22, which is the finishing portion 20 (i.e., the floor finishing surface 20a), is located above the surface 12a of the overhang portion 12 of the escape hatch 10C that is in contact with the support surface 15 of the outdoor floor portion 3.

[0066] In the example shown in Figure 4(b), the height of the extension portion 14, which is integrally provided at the upper end of the cylindrical main frame 11, from the floor finish surface 20a is set lower than in the example shown in Figure 4(a). In this example, the height position of the bottom surface of the extension portion 14 and the height position of the upper surface of the first waterproof sheet 22 are set to be approximately equal. Furthermore, the protruding tip of the second base material 38 does not reach the side surface of the cylindrical main frame 11, but is located directly below the side surface of the extension portion 14. The second waterproof sheet 23 is attached in an L-shape, spanning the side of the cylindrical main frame 11 and the end portion of the first waterproof sheet 22, which is attached across the upper surface of the first base material 37 and the upper surface of the second base material 38. In the example shown in Figure 4(b), the upper surface of the first waterproof sheet 22, which is the finishing part 20 (i.e., the floor finishing surface 20a), is located above the surface 12a of the overhang 12 of the escape hatch 10C that is in contact with the support surface 15 of the outdoor floor part 3.

[0067] In the example shown in Figure 4(c), the height of the extension portion 14, which is integrally provided at the upper end of the cylindrical main frame 11, from the floor finish surface 20a is set even lower than in the example shown in Figure 4(b). In this example, the height position of the bottom surface of the extension portion 14 is set lower than the height position of the upper surface of the first waterproof sheet 22. Furthermore, the second base material 38, whose upper surface is positioned above the bottom surface of the extension 14, has its protruding tip positioned with a gap between it and the side surface of the extension 14. Then, the end portion of the second waterproof sheet 23, which is attached to the end portion of the first waterproof sheet 22, is folded and inserted into the gap and attached to the end face of the second base material 38 on the escape hatch 10C side. A backup material 39a is provided in the gap, and a sealing material 39 is filled on top of it, thereby closing the gap. Alternatively, the second waterproof sheet 23 may not be used, and the end portion of the first waterproof sheet 22 may be folded and inserted into the gap. In the example shown in Figure 4(c), the upper surface of the first waterproof sheet 22, which is the finishing part 20 (i.e., the floor finishing surface 20a), is located above the surface 12a of the overhang 12 of the escape hatch 10C that is in contact with the support surface 15 of the outdoor floor part 3.

[0068] According to this embodiment, when the escape hatch 10C is installed on the outdoor floor 3, the resulting step height can be minimized to improve the appearance of the outdoor floor 3 and reduce the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 can be reduced as much as possible to improve waterproofing.

[0069] <Example 4> In this embodiment, as shown in Figure 5, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10D is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0070] To explain in more detail, first, the escape hatch 10D is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0071] The protruding portion 12 is integrally provided with respect to the cylindrical main frame 11. That is, the cylindrical main frame 11 and the protruding portion 12 may be formed by bending, or the protruding portion 12 may be joined to the cylindrical main frame 11 by welding or the like.

[0072] The outdoor floor section 3 is either entirely made of wood or includes wooden components. The portion of the upper surface of the outdoor floor section 3 that runs along the edge of the opening 4 is designated as the support surface 15. The protruding portion 12 of the escape hatch 10D is supported by the outdoor floor section 3 with its lower surface 12a in contact with the support surface 15. Furthermore, the floor finishing material 21, which is the finishing portion 20, is provided with its lower surface in contact with the upper surface of the outdoor floor portion 3, and the floor finishing surface 20a is located below the upper surface of the overhang portion 12. However, it is not limited to this, and may be supported by a base material not shown. Since the height of the upper surface (floor finish surface 20a) of the floor finish material 21 is set lower than the height of the upper surface of the protruding portion 12 of the escape hatch 10D, a step is formed between the protruding portion 12 of the escape hatch 10D and the finish portion 20.

[0073] The escape hatch 10D is provided such that the cylindrical main frame 11 is fitted into the opening 4 on the outdoor floor 3, and the protruding portion 12 rests on and is in contact with the support surface 15. Furthermore, this escape hatch 10D is fixed to the outdoor floor 3 by fixing means (not shown) while avoiding the wooden parts that make up the outdoor floor 3.

[0074] Between the protruding portion 12 of the escape hatch 10D installed as described above and the floor finishing material 21, an inclined frame member 42 is further provided, which is positioned around the escape hatch 10D and has an inclined upper surface 42a. The inclined surface 42a of the inclined frame member 42 is set so that its upper end in the direction of inclination is approximately equal to the height of the upper surface of the overhang 12, and its lower end in the direction of inclination is approximately equal to the height of the floor finishing surface 20a of the floor finishing material 21, which is the finishing part 20. As a result, the upper surface of the overhang 12, which is located above, and the floor finishing surface 20a of the finishing part 20, which is located below, are connected by the inclined surface 42a of the inclined frame member 42. In other words, although a step is created because the overhang 12 of the escape hatch 10D and the floor finishing material 21 have different upper surface heights, the inclined frame member 42 connects this step.

[0075] According to this embodiment, when the escape hatch 10D is installed on the outdoor floor 3, the resulting step is minimized, improving the appearance of the outdoor floor 3 and reducing the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 is reduced as much as possible, thereby improving waterproofing.

[0076] <Example 5> In this embodiment, as shown in Figure 6, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10E is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a steel floor finish material 24.

[0077] To explain in more detail, first, the escape hatch 10E is made of steel and has protruding portions 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The protruding portions 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0078] The protruding portion 12 is integrally provided with respect to the cylindrical main frame 11. That is, the cylindrical main frame 11 and the protruding portion 12 may be formed by bending, or the protruding portion 12 may be joined to the cylindrical main frame 11 by welding or the like.

[0079] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30. This surface layer includes, for example, a fire-resistant surface material 31 made of gypsum board, an insulating panel 32 made of, for example, Styrofoam, a first base plywood 33, a second base plywood 34, and so on. In addition, it may also include a waterproof sheet 22 when not used as a finishing part 20, and, for example, a flashing material 33a and soffit material 35 as shown in Figure 11.

[0080] Such an outdoor floor section 3 includes a support section 40 provided along the edge of the opening 4. In this embodiment, the support portion 40 is composed of a support rail provided so as to surround the opening 4, and its upper surface is a support surface 15 to which the protruding portion 12 of the escape hatch 10E abuts and which supports the escape hatch 10E.

[0081] A steel floor finishing material 24, which is the finishing part 20, is provided on top of the second base plywood 34 (on top of the waterproof sheet 22). Multiple base materials 24a are provided on the upper surface of the second base plywood 34 (waterproof sheet 22), and the steel floor finishing material 24 is placed on and supported by these base materials 24a.

[0082] In this embodiment, the steel floor finishing material 24, which is the finishing part 20, and the protruding part 12 of the steel escape hatch 10E are integrally formed. The overhang 12 and the steel floor finishing material 24 may be integrally formed in advance, or they may be integrally formed after the installation of the escape hatch 10E and the steel floor finishing material 24 is completed. The integral formation of the overhang 12 and the steel floor finishing material 24 shall be carried out by welding, but if they are integrally formed in advance, the overhang 12 and the steel floor finishing material 24 may be manufactured as a single part, or they may be joined by means other than welding.

[0083] The escape hatch 10E is installed such that the cylindrical main frame 11 is fitted into the opening 4 of the outdoor floor 3, and the protruding portion 12 rests on and is in contact with the support surface 15. However, if the steel floor finishing material 24 is pre-formed as an integral part, the installation of the escape hatch 10E and the steel floor finishing material 24 will be carried out simultaneously.

[0084] The outdoor floor section 3 has its surface finished with a steel floor finishing material 24, which is the finishing section 20, forming a floor finishing surface 20a. The floor finishing surface 20a is located above the surface 12a (i.e., the lower surface 12a) of the overhang 12 of the escape hatch 10E that is in contact with the support surface 15 of the outdoor floor section 3. Furthermore, the thickness of the overhang 12 and the thickness of the steel floor finishing material 24 are set to be equal. Therefore, no step is formed between the overhang 12 and the steel floor finishing material 24.

[0085] According to this embodiment, when the escape hatch 10E is installed on the outdoor floor 3, the resulting step height can be minimized to improve the appearance of the outdoor floor 3 and reduce the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 can be reduced as much as possible to improve waterproofing.

[0086] <Example 6> In this embodiment, as shown in Figure 7(a), an opening 4 is formed in the outdoor floor 3, and the escape hatch 10F is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a waterproof sheet 22.

[0087] To explain in more detail, first, the opening 4 formed in the outdoor floor section 3 is a frustoconical (mortar-shaped) through-hole. That is, the diameter of the lower opening of such an opening 4 is set to be smaller than the diameter of the upper opening, and the sides of the opening 4 are formed to gradually narrow as they go downwards. Furthermore, the cylindrical main frame 11 that constitutes the escape hatch 10F is formed as a frustoconical cylinder corresponding to the shape of the opening 4 and is fitted into the opening 4. Because the cylindrical main frame 11, which is also frustoconical, is housed in the opening 4, which is a frustoconical through-hole, the cylindrical main frame 11 is unlikely to slip out of the opening 4 even if it is simply inserted from above. The escape ladder 13 is attached to the inner surface of the cylindrical main frame 11, which is formed as a truncated cone-shaped tube.

[0088] The top cover 11a of the escape hatch 10F is also fitted into the opening 4, similar to the cylindrical main frame 11. Therefore, the top cover 11a is also formed in a thin, truncated cone shape. When fitted into the opening 4, such a top cover 11a contacts the upper end surface of the cylindrical main frame 11 and also contacts the side surface of the opening 4. As shown in Figure 7(b), the portion of the top cover 11a that extends laterally beyond the outermost part of the upper end surface of the cylindrical main frame 11 is defined as the overhang portion 12 in this embodiment. In other words, the line indicated by the dashed line in Figure 7(b) is the outermost part of the upper end surface of the cylindrical main frame 11, and the edge of the top cover 11a that extends laterally beyond this line is defined as the overhang portion 12 in this embodiment. The overhanging and inclined surface 12a of this overhang portion 12 is the portion that is in contact with the outdoor floor portion 3.

[0089] The outdoor floor section 3 is either entirely made of wood or includes wooden components. Of these outdoor floor sections 3, the portion at the upper end of the side surface of the opening 4 where the top cover 11a makes contact is the support surface 15 that the overhang 12 of the escape hatch 10F (the edge surface 12a of the top cover 11a) makes contact with and supports the escape hatch 10F. Furthermore, the surface of the outdoor floor section 3 is covered with a waterproof sheet 22. The area covered by the waterproof sheet 22 extends not only to the top surface of the outdoor floor section 3 but also to the sides of the opening 4.

[0090] The escape hatch 10F is configured such that a cylindrical main frame 11 is fitted into the opening 4 on the outdoor floor 3, and a top cover 11a is placed over it, with the protruding edge 12 of the top cover 11a in contact with the support surface 15. The outdoor floor section 3 has its surface finished by a waterproof sheet 22, which is the finishing section 20, forming a floor finish surface 20a. The floor finish surface 20a is located above the surface 12a of the overhang 12 of the escape hatch 10F, which is provided as described above, that is in contact with the support surface 15 of the outdoor floor section 3. The thickness of the top cover 11a in the escape hatch 10F may be greater than shown in the illustration. In that case, the top surface of the top cover 11a will be located above the floor finish surface 20a.

[0091] According to this embodiment, when the escape hatch 10F is installed on the outdoor floor 3, the resulting step difference can be minimized to improve the appearance of the outdoor floor 3 and reduce the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 can be reduced as much as possible to improve waterproofing. Furthermore, since the waterproof sheet 22 is interposed between the top cover 11a and the cylindrical main frame 11 and the side surface of the opening 4, the top cover 11a and the cylindrical main frame 11 will be in close contact with the waterproof sheet 22, thereby improving waterproofing.

[0092] [Reference example 1] Figure 8 shows an example where the escape hatch 10G is constructed using only the top cover 11a, without the cylindrical main frame 11.

[0093] The opening 4 formed in the outdoor floor section 3 is a frustoconical (mortar-shaped) through-hole. The surface of this outdoor floor section 3 is finished by a finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a waterproof sheet 22, which is attached to the upper surface of the outdoor floor section 3 and the side surface of the opening 4.

[0094] The top cover 11a is fitted into the frustoconical opening 4. Therefore, the top cover 11a is also formed in a thin frustoconical shape and comes into contact with the side surface of the opening 4 when fitted into it. The top cover 11a, configured in this way, is less likely to shift position even when a load is applied from above, and therefore is less likely to be an obstacle to walking. Furthermore, since the top cover 11a is placed into the opening 4 over the waterproof sheet 22 attached to the side of the opening 4, the waterproof sheet 22 is interposed between the edge of the top cover 11a and the side of the opening 4. As a result, the top cover 11a is in close contact with the waterproof sheet 22, thereby improving waterproofing.

[0095] The thickness of the top cover 11a may be greater than shown in the example. In that case, the top surface of the top cover 11a will be located above the floor finish surface 20a.

[0096] <Example 7> Figure 9 shows an example of the placement of the escape hatch 10 on the outdoor floor 3. In this embodiment, the outdoor floor section 3 constitutes the floor of the balcony 2, which is formed in an L-shape in plan view. This balcony 2 is a cantilevered balcony that extends from the exterior wall 5 of the building 1, where the window 5a is located, and extends on one side in the width direction (XX' direction) and one side in the depth direction (YY' direction). In other words, it is a so-called two-way cantilevered balcony.

[0097] Balcony 2 is divided into two areas: the first area 2A, which is longer in the width direction than in the depth direction, and the second area 2B, which is longer in the depth direction than in the width direction. In this embodiment, the area on the X side of the line indicated by the dashed line in Figure 9 is designated as the first area 2A, and the area on the X' side is designated as the second area 2B. The length of the first area 2A in the frontage direction is set to be longer than the length of the second area 2B in the depth direction.

[0098] The area located on the Y side of the second area 2B in balcony 2 is the hidden corner 2b from the first area 2A. Corner 2b refers to the area located on the Y side of the extension line that would be obtained if the outer surface of the outer wall 5 with window 5a were to be extended. The escape hatch 10 is installed in the outdoor floor area 3 located at this corner 2b. That is, an opening 4 is formed in the outdoor floor area 3 located at the corner 2b of the balcony 2, and the escape hatch 10 is fitted into this opening 4 and installed in the outdoor floor area 3.

[0099] The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. The floor finish surface 20a formed by the finishing section 20 is located above the surface 12a of the overhang 12 of the escape hatch 10 that is in contact with the support surface 15 of the outdoor floor section 3.

[0100] In this embodiment, the balcony 2 is mainly used in the first area 2A facing the window 5a of the exterior wall 5 and on the Y' side of the second area 2B. Therefore, the corner 2b of the balcony 2, which is hidden from the first area 2A, is suitable as a location for installing the escape hatch 10, which is not used on a daily basis. Furthermore, within the second area 2B, a partition plate 6 is provided that divides the second area 2B into Y-side and Y'-side along the extension of the outer surface of the outer wall 5 with window 5a, assuming that the outer surface is extended. The partition plate 6 normally restricts movement and line of sight from the first area 2A side to the corner 2b where the escape hatch 10 is located, but it can be kicked through when the escape hatch 10 is in use.

[0101] In this embodiment, the escape hatch 10 is installed on the outdoor floor area 3 located at the corner 2b of the balcony 2 that is not used on a daily basis, thus reducing the obstruction to walking. Furthermore, since the corner 2b of the balcony 2 can be shielded by the partition plate 6, the appearance of the balcony 2 and the outdoor floor area 3 can be improved.

[0102] <Example 8> In this embodiment, as shown in Figure 10, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10H is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0103] To explain in more detail, first, the escape hatch 10H is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0104] The protruding portion 12 is integrally provided with respect to the cylindrical main frame 11. That is, the cylindrical main frame 11 and the protruding portion 12 may be formed by bending, or the protruding portion 12 may be joined to the cylindrical main frame 11 by welding or the like.

[0105] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30. This surface layer includes, for example, a fire-resistant surface material 31 made of gypsum board, an insulating panel 32 made of, for example, Styrofoam, a first base plywood 33, a second base plywood 34, and so on. In addition, it may also include a waterproof sheet 22 when not used as a finishing part 20, and, for example, a flashing material 33a and soffit material 35 as shown in Figure 11.

[0106] Such an outdoor floor section 3 includes a support section 43 provided along the edge of the opening 4. The support section 43 is composed of a rectangular tubular support bar that surrounds the opening 4, and its upper surface is a support surface 15 that contacts the protruding portion 12 of the escape hatch 10H and supports the escape hatch 10H. The support portion 43 is positioned above the end of the opening 4 on the floor body 30 and is fixed to the frame member 30a of the floor body 30 by a fixing material 43b, such as a long screw. More specifically, the support portion 43 is formed in a rectangular tube shape and comprises an upper plate portion, a lower plate portion, and two side plate portions. Through holes are formed in both the upper plate portion and the lower plate portion for passing the fixing material 43b through. The through hole in the upper plate portion is set to a large diameter so that the head of the fixing material 43b can pass through, while the through hole in the lower plate portion is set to a small diameter so that only the shaft portion can pass through, not the head of the fixing material 43b. These upper and lower through holes are formed as a set and are formed in multiples at intervals along the length of the support portion 43.

[0107] An insulating panel 32 is provided on top of the fire-resistant surface material 31 covering the upper surface of the floor body 30, avoiding the opening 4. Furthermore, there are two types of insulating panels 32: one positioned above the opening 4 relative to the support portion 43, and another positioned closer to the outer wall 5 relative to the support portion 43. The insulation panel 32 located in the opening 4 above the support portion 43 is a water-sloping insulation panel 32 with an inclined upper surface, and it slopes downward from the support portion 43 towards the opening 4. On the other hand, the insulation panel 32 located on the exterior wall 5 side of the support portion 43 is a water-sloping insulation panel 32 with an inclined upper surface, and slopes downward from the support portion 43 towards the exterior wall 5.

[0108] A first base plywood 33 is provided on the surface side of the fire-resistant surface material 31 that covers the surface of the floor body 30 facing the opening 4, and a second base plywood 34 is provided on the surface side of the fire-resistant surface material 31 that covers the upper surface of the floor body 30. As described above, two sloped insulation panels 32 are provided on top of the fire-resistant surface material 31 that covers the upper surface of the floor body 30, so the second base plywood 34 is provided on top of these two sloped insulation panels 32. Furthermore, the upper end of the first base plywood 33 and the side end of the second base plywood 34, which is installed on the insulation panel 32 located on the side of the opening 4, are adjacent to each other, and the upper surface of the first base plywood 33 and the upper surface of the second base plywood 34 are flush.

[0109] As described above, the first base plywood 33 and the second base plywood 34 located on the side of the opening 4 are adjacent to each other, and therefore their surfaces are continuous. A waterproof sheet 22 is continuously attached to the surfaces of the first base plywood 33 and the second base plywood 34. Furthermore, a waterproof sheet 22 is also attached to the surface of the second base plywood 34 located on the exterior wall 5 side, and this waterproof sheet 22 is attached continuously to the exterior wall 5 side.

[0110] A floor finishing material 21, which is the finishing part 20, is provided on top of the second base plywood 34 (on top of the waterproof sheet 22). A base material (not shown) is provided between the second base plywood 34 (waterproof sheet 22) and the floor finishing material 21. The upper surface of this floor finishing material 21 is a very gently sloping surface formed toward the periphery of the outdoor floor part 3. The floor finishing material 21 is positioned to avoid the opening 4 and the upper cover 11a of the escape hatch 10H, and its dimensions are set so that there is no large gap between it and the escape hatch 10H.

[0111] The escape hatch 10H is installed such that a cylindrical main frame 11 is fitted into the opening 4 on the outdoor floor 3, and an overhanging portion 12 rests on and is in contact with the support surface 15. In other words, the protruding portion 12 of the escape hatch 10H rests on the support surface 15 on the upper surface of the support portion 43, which is a rectangular tubular support rail, and is fixed with fasteners 43a such as screws. These fasteners 43a are a fixing means that secures the protruding portion 12 of the escape hatch 10H to the support portion 43, which is a support rail of the outdoor floor portion 3, while avoiding the wooden parts (floor body 30) that make up the outdoor floor portion 3. Furthermore, the support portion 43 is positioned at a distance from the opening 4 side, and on the opening 4 side of the support portion 43, a water-sloping insulation panel 32 and a second base plywood 34 are provided as described above. A sealing material 44 is interposed between this second base plywood 34 (waterproof sheet 22) and the overhang 12.

[0112] The floor finishing material 21, which is the finishing section 20, is placed on the upper surface of the overhang 12 and is supported by the overhang 12 and a base material (not shown) provided on the upper surface of the waterproof sheet 22. The height position of the upper end in the inclined direction on the upper surface of the floor finishing material 21 is set to be approximately equal to the height position of the upper surface of the top cover 11a of the escape hatch 10H.

[0113] According to this embodiment, when the escape hatch 10H is installed on the outdoor floor 3, the waterproofing is improved and the good installation condition of the escape hatch 10H can be maintained. Furthermore, by minimizing the height difference that occurs when the escape hatch 10H is installed on the outdoor floor 3, the appearance of the outdoor floor 3 is improved, and it becomes less of an obstacle for walking. In addition, by minimizing the number of steps formed on the outdoor floor 3, waterproofing can be improved.

[0114] <Example 9> In this embodiment, as shown in Figure 11, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10I is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a waterproof sheet 22, but it is not limited to this and may be a floor finishing material 21.

[0115] To explain in more detail, first, the escape hatch 10I is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3. A sealing material 45, such as EPDM, is interposed between the protruding portion 12 and the outdoor floor portion 3.

[0116] In this embodiment, the protruding portion 12 is integrally formed with the cylindrical main frame 11, extending laterally from the upper edge of the cylindrical main frame 11, and the upper end surface of the cylindrical main frame 11 and the upper surface of the protruding portion 12 form a continuous plane. The top cover 11a is placed across the upper end surface of the cylindrical main frame 11 and the upper surface of the protruding portion 12.

[0117] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels as described above. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30. This surface layer includes, for example, a fire-resistant surface material 31 made of gypsum board, and a first base plywood 33, a second base plywood 34, etc. It also includes a flashing material 33a, an eaves material 35, etc. Furthermore, it may also include, for example, an insulation panel 32 made of Styrofoam, etc.

[0118] In the surface layer of the floor body 30, the upper and lower surfaces and the sides of the opening 4 are covered with two layers of fire-resistant material 31. The lower surface of the fire-resistant material 31 covering the lower surface of the floor body 30 is flush with the lower end surface of the fire-resistant material 31 covering the sides of the opening 4. A first base plywood 33 is provided on the surface side of the fire-resistant surface material 31 that covers the surface of the floor body 30 on the side of the opening 4, and a second base plywood 34 is provided on the surface side of the fire-resistant surface material 31 that covers the upper surface of the floor body 30.

[0119] The underside of the floor body 30 is provided with hangers and joist supports (not shown), and joists 35a are attached to the joist supports, and soffit material 35 is attached to the underside of these joists 35a. As a result, a soffit is formed below the floor body 30.

[0120] The upper end of the first base plywood 33 and the side end of the second base plywood 34, which is installed on top of the normal insulation panel 32, on the side facing the opening 4 are adjacent, and the upper surface of the first base plywood 33 and the upper surface of the second base plywood 34 are flush. The lower end of the first base plywood 33 extends to the position of the soffit material 35. The soffit material 35 is installed straddling the lower surface of the furring strip 35a and the lower end surface of the first base plywood 33.

[0121] A waterproof sheet 22, which is the finishing part 20, is attached to the top surface of the second base plywood 34 and the side surface of the first base plywood 33. As described above, the first base plywood 33 and the second base plywood 34 are adjacent to each other, so the waterproof sheet 22 is continuously attached to the surfaces of the first base plywood 33 and the second base plywood 34. Between the lower end of the first base plywood 33 and the waterproof sheet 22, a flashing material 33a is provided, the lower end of which protrudes below the lower end of the first base plywood 33. Rainwater adhering to the waterproof sheet 22 of the opening 4 runs down to the lower end of the flashing material 33a before falling downwards, so it is less likely to seep between the first base plywood 33 and the waterproof sheet 22, resulting in excellent waterproofing.

[0122] The portion of the upper surface of the outdoor floor 3 that runs along the edge of the opening 4 is designated as the support surface 15. The escape hatch 10I is installed on the outdoor floor 3 such that the cylindrical main frame 11 is fitted into the opening 4, and the protruding portion 12 rests on and is in contact with the support surface 15. In other words, the escape hatch 10I is supported by the outdoor floor 3 with the lower surface 12a of the protruding portion 12 in contact with the support surface 15. Furthermore, a gap 4a is formed between the outer surface of the cylindrical main frame 11 housed in the opening 4 and the waterproof sheet 22 covering the side of the opening 4.

[0123] The escape hatch 10I, as described above, is fixed to the outdoor floor 3 by the fixing means 50, while avoiding the wooden parts (i.e., the floor body 30) that make up the outdoor floor 3. The fixing means 50 of this embodiment includes a bracing portion 51 positioned in the gap 4a and a reciprocating operation portion 52 that moves the bracing portion 51 forward and backward in the horizontal direction.

[0124] The bracing portion 51 has a main plate portion formed in the shape of a plate, a connecting portion to which the retraction operation portion 52 is connected, and an anti-slip portion 51a provided on the surface of the main plate portion (the surface facing the opening 4). This bracing portion 51 is capable of moving back and forth within the gap 4a in the direction away from and towards the cylindrical main frame 11. In other words, the thickness dimension of the plate-shaped bracing portion 51 is set to be shorter than the spacing dimension of the gap 4a, and by utilizing this dimensional difference, it is possible to move back and forth in the direction away from and towards the cylindrical main frame 11 (i.e., in the horizontal direction).

[0125] The bracing portions 51 are arranged to correspond to each of the four sides of the cylindrical main frame 11, but they may also be arranged to correspond to two perpendicular sides. In that case, it is preferable to provide anti-slip portions 51a on the remaining two sides. Furthermore, the width of the bracing portion 51 is set to be approximately equal to or slightly shorter than the side wall portion that constitutes the four sides of the cylindrical main frame 11, but it is not limited to this, and it may be set to be shorter. Furthermore, the bracing portion 51 does not need to be one on each side of the cylindrical main frame 11; multiple portions may be provided.

[0126] The connecting portion is a female screw portion formed along the thickness direction of the main plate portion. A portion of it protrudes from the surface of the main plate portion on the side of the cylindrical main frame 11. This allows the female screw portion to be extended slightly, thereby extending the range of movement of the bracing portion 51.

[0127] The anti-slip portion 51a is made of, for example, EPDM, and exerts a strong frictional force when it comes into contact with and is pressed against the side surface of the opening 4.

[0128] The retractable operating section 52 is made of a bolt and is inserted from inside the cylindrical main frame 11 toward the bracing section 51 through a through hole formed in the side wall of the cylindrical main frame 11, with its tip connected to the connecting section of the bracing section 51. In other words, the connecting section of the bracing section 51 is made of a female threaded section into which the tip of the retractable operating section 52, which is a bolt, is inserted and screwed, as described above.

[0129] When moving the bracing portion 51 horizontally using the extension / retraction operating portion 52, the extension / retraction operating portion 52, which is a bolt, should be rotated in the direction of removing it from the connecting portion. This causes the main plate portion to separate from the cylindrical main frame 11, allowing the anti-slip portion 51a to be pressed against the side surface of the opening 4. Conversely, when the bolt-like extension / retraction mechanism 52 is screwed into the female threaded connecting mechanism, the main body plate moves closer to the cylindrical main body frame 11, causing the anti-slip portion 51a to move away from the side of the opening 4, and the bracing portion 51 to no longer be braced. Furthermore, in order to increase the bracing force of the bracing portion 51 by the retraction operation unit 52, multiple retraction operation units 52 may be provided for a single bracing portion 51.

[0130] Furthermore, the fixing means 50 described above also functions as a movement restraining means that suppresses the movement of the escape hatch 10I in the lateral direction perpendicular to the direction in which the overhang 12 is placed on the support surface 15 of the outdoor floor 3 (from top to bottom). In other words, the side surface of the opening 4 in the outdoor floor 3 that the bracing portion 51 contacts becomes the contact surface that the movement restraining means contacts.

[0131] According to this modified example, the escape hatch 10I can be fixed to the outdoor floor 3 without the fixing means 50 penetrating the waterproof sheet 22, which is the finishing part 20. Therefore, the waterproofing when the escape hatch 10I is installed on the outdoor floor 3 can be improved, and the escape hatch 10I can be kept in good condition. Furthermore, since movement of the escape hatch 10I can be suppressed, rattling and cracking of the sealing material when the escape hatch 10I is installed on the outdoor floor 3 can be suppressed, and the escape hatch 10I can be maintained in a good installed state.

[0132] <Example 10> In this embodiment, as shown in Figure 12, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10J is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a waterproof sheet 22, but it is not limited to this and may be a floor finishing material 21.

[0133] The escape hatch 10J is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3. A sealing material 45, such as EPDM, is interposed between the protruding portion 12 and the outdoor floor portion 3. The top cover 11a rests across the upper end surface of the cylindrical main frame 11 and the upper surface of the protruding portion 12.

[0134] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels as described above. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30. This surface layer includes, for example, a fire-resistant surface material 31 made of gypsum board, a first base plywood 33, a second base plywood 34, and soffit material 35. Furthermore, it may also include, for example, an insulating panel 32 made of Styrofoam.

[0135] A fixing base member 54, used to secure the escape hatch 10J to the outdoor floor 3, is attached to the side of the opening 4 (i.e., the side of the first base plywood 33 facing the opening 4) by fasteners 55 such as screws. The fixed base member 54 has an upper end surface at the same height as the upper end surface of the first base plywood 33, and a lower end surface at the same height as the lower surface of the soffit material 35. The fixed base member 54 is formed in a rectangular tube shape and comprises an upper plate portion, a lower plate portion, and two side plate portions. One side plate portion is in contact with the surface of the first base plywood 33 on the opening 4 side, and the other side plate portion is positioned on the escape hatch 10J side. Furthermore, through holes 54a are formed in both side panels for passing the fixing material 55 used to fix the fixing base member 54 to the floor body 30. The through hole 54a in the other side panel is set to a large diameter so that the head of the fixing material 55 can pass through, while the through hole 54a in the other side panel is set to a small diameter so that only the shaft of the fixing material 55 can pass through, and not the head. The fixing material 55 is set to a length that reaches the end of the opening 4 side of the floor body 30, so that the fixing base member 54 can be fixed to the frame material 30a of the floor body 30 by the fixing material 55.

[0136] Another through-hole 54b is formed in the other side plate portion of the fixed base member 54. A bolt (i.e., a fixing material), which is a fixing means 53 for fixing the cylindrical main frame 11 of the escape hatch 10J to the fixed base member 54, is screwed into this other through-hole 54b. In other words, this other through-hole 54b is a bolt hole 54b and is formed in a different position from the through-hole 54a through which the fixing material 55 for fixing the fixed base member 54 is passed, as shown in Figure 13. A drainage hole 54c is formed in the lower plate portion of the fixed base member 54.

[0137] The fixing base member 54 in this embodiment is formed in a rectangular tube shape as a whole, and when it is placed in the opening 4, each of the four side plates of the fixing base member 54 is in contact with the four sides of the opening 4. Each of the through holes 54a and 54b is formed in multiple locations in both the width and height directions on each side of the fixed base member 54.

[0138] In this embodiment, the waterproof sheet 22, which is the finishing part 20, is attached to the upper surface of the outdoor floor part 3 and the side surface of the opening 4. Specifically, the waterproof sheet 22 is attached from the upper surface of the second base plywood 34 to the other side plate portion of the fixed base member 54 attached to the opening 4 side surface of the first base plywood 33. Since drainage holes 54c are formed in the lower plate portion of the fixed base member 54, the lower end of the waterproof sheet 22 does not cover the lower plate portion of the fixed base member 54.

[0139] The escape hatch 10J is installed such that a cylindrical main frame 11 is fitted into the opening 4 from above on the outdoor floor 3, and an overhanging portion 12 rests on and is in contact with the support surface 15. Then, a bolt, which is the fixing means 53, is screwed in from inside the cylindrical main frame 11 toward a bolt hole 54b formed in the other side plate of the fixing base member 54. At this time, the bolt 53 is passed through the waterproof sheet 22 attached to the other side plate of the fixing base member 54 and through the bolt hole 54b. Even if water were to seep into the interior of the fixing base member 54 through the holes and bolt holes 54b made in the waterproof sheet 22, it would be discharged through the drainage holes 54c formed in the bottom plate.

[0140] According to this embodiment, since the escape hatch 10J is fixed to the fixing base member 54, the waterproofing when the escape hatch 10J is installed on the outdoor floor 3 is improved, and the good installation condition of the escape hatch 10J can be maintained.

[0141] <Example 11> In this embodiment, as shown in Figures 14 and 15, the outdoor floor section 3 includes a steel floor body 60 fixed to the wooden frame of the wooden building 1. An opening 4 is formed in the steel floor body 60. The escape hatch 10K is fitted into the opening 4 and installed in the outdoor floor section 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a waterproof pan 25.

[0142] The steel floor body 60 has a plurality of brackets 61 that protrude laterally from the building structure, and a frame section 62 formed by assembling a plurality of frame members 63, 64 in a frame shape and spanning between the plurality of brackets 61. Furthermore, the area of ​​the frame 62 surrounded by multiple frame members 63 and 64 is designated as the opening 4, and the upper surfaces of the multiple frame members 63 and 64 are designated as support surfaces 15 to which the protruding portion 12 of the escape hatch 10K abuts and to support the escape hatch 10K.

[0143] In this embodiment, the building 1 has an outdoor floor 3 and the floor directly below it, both constructed at least by a so-called panel construction method, and is equipped with a wooden frame made of building panels. The exterior wall 5 of the building 1 is made of building wall panels, and the indoor floor 7 of the building 1 is made of building floor panels. More specifically, a half-joint gap 7a, set to be about half the thickness of the exterior wall 5, and the frame material of the indoor floor section 7 of the upper floor are placed on the upper end surface of the exterior wall 5 of the lower floor, and the exterior wall 5 of the upper floor is erected on the upper end surface of the half-joint gap 7a and the upper surface of the indoor floor section 7.

[0144] The bracket 61 of the steel floor body 60 is connected to the part where the exterior wall 5 of the upper and lower floors intersects with the indoor floor section 7 of the upper floor. The bracket 61 is connected by connecting the base portion 61a, which is provided at the base end of the bracket 61, to the indoor floor portion 7 by the connecting means 61b. The connecting means has a portion that is fixed to the indoor floor portion 7 and a connecting bolt that extends from that portion through the half-joint 7a to the outdoor side, and the base portion 61a of the bracket 61 is connected to the connecting bolt. The steel floor body 60 is integrally provided with the building frame 1 via a plurality of brackets 61 connected in this manner.

[0145] The frame section 62 consists of two first frame members 63 that are spanned between multiple bracket members 61, and these It has two second frame members 64 spanning between two first frame members 63. These first frame members 63 and second frame members 64 are angle members. The first frame member 63 is bolted (bolt and nut) at both ends in the longitudinal direction to a fixing angle 63a which is fixed to the side of the arm fitting 61. The area enclosed by these two first frame members 63 and two second frame members 64 is defined as the opening 4. When the first frame members 63 and the second frame members 64 are arranged perpendicularly to each other, one of them will overlap the other. For example, if the one that overlaps is the second frame member 64, the top surface of the lower first frame member 63 will be lower in height than the top surface of the upper second frame member 64. Therefore, a plate-shaped height adjustment member may be provided on the top surface of the lower frame member to match the height of the upper frame member.

[0146] The escape hatch 10K consists of a cylindrical main frame 11 fitted into an opening 4 formed by a frame portion 62, and an overhang 12 resting on a support surface 15 formed by the frame portion 62. The overhang 12 is then fixed to the frame portion 62 (first frame material 63, second frame material 64) by fixing means 56. In this embodiment, the fixing means 56 is a bolt (i.e., a fixing material). Therefore, bolt holes are formed in the upper plate portions of the first frame material 63 and the second frame material 64 through which the bolt 56 passes. Bolt holes are also assumed to be formed in the overhang portion 12. Furthermore, nuts are welded to the lower surfaces of the top plates of the first frame material 63 and the second frame material 64 at locations corresponding to the bolt holes, so that the bolts 56 can be screwed in.

[0147] The waterproof pan 25, which is the finishing part 20, is supported by resting on the upper surface of the bracket 61 and the overhang 12. The waterproof pan 25 is positioned to avoid the opening 4 and the escape hatch 10K, and its dimensions are set so that there is no large gap between it and the escape hatch 10K. Since this waterproof pan 25 is also placed on the upper surface of the overhang 12, at least the waterproof pans 25 positioned around the escape hatch 10K are laid after the escape hatch 10K is installed.

[0148] According to this embodiment, since the outdoor floor section 3 is made of a steel floor body 60, the waterproofing when the escape hatch 10K is installed on the outdoor floor section 3 can be improved, and the escape hatch 10K can be kept in good condition.

[0149] [Reference example 2] Figures 16 and 17 show examples of damming materials 57 that prevent water received by the outdoor floor section 3 from flowing to the lower floor through the opening 4. Figure 17 is an enlarged view of the main section MP in Figure 16.

[0150] In this example, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10L is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0151] The escape hatch 10L is equipped with protruding portions 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The protruding portions 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4.

[0152] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly composed of this floor body 30. The floor body 30 is made of wooden building panels. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30.

[0153] Such an outdoor floor section 3 includes a support section 40 provided along the edge of the opening 4. In this embodiment, the support portion 40 includes a support rail 40a provided so as to surround the opening 4, and a sealing material 40b provided along the outer surface of the support rail 40a. Furthermore, the upper surface of the support rail 40a is the support surface 15 that contacts the protruding portion 12 of the escape hatch 10L and supports the escape hatch 10L.

[0154] As shown in Figure 17, the damming material 57 is provided on the upper surface of the outdoor floor section 3, sandwiched between the lower surface of the support rail 40a in the support section 40. This damming material 57 is an L-shaped angle material and has a bottom plate portion 57a ​​located on the lower surface of the support rail 40a and a vertical plate portion 57b that rises vertically from the end of the bottom plate portion 57a ​​on the side of the opening 4.

[0155] Such a damming material 57 is provided together with the support portion 40 so as to surround the opening 4. Furthermore, the damming material 57 is provided on the opening 4 side of the support portion 40 that supports the escape hatch 10L. Therefore, if water received by the outdoor floor portion 3 flows, for example, beyond the sealing material 40b towards the support rail 40a side, the water can be dammed by the damming material 57.

[0156] According to this example, it is preferable because water received by the outdoor floor section 3 is less likely to flow to the lower floor through the opening 4.

[0157] <Example 12> In this embodiment, as shown in Figure 18, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10M is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0158] The escape hatch 10M is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4. The lower surface 12a of the protruding portion 12 is the part that is in contact with the outdoor floor portion 3.

[0159] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly constructed from this floor body 30. The floor body 30 is made of wooden building panels. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30. This surface layer includes a waterproof sheet 22, a fire-resistant surface material 31, an insulating panel 32, a first base plywood 33, a second base plywood 34, and the like.

[0160] A floor finishing material 21, which is the finishing part 20, is provided on top of the second base plywood 34 (on top of the waterproof sheet 22). A base material (not shown) is provided between the second base plywood 34 (waterproof sheet 22) and the floor finishing material 21. The upper surface of this floor finishing material 21 is a very gently sloping surface formed toward the periphery of the outdoor floor part 3.

[0161] Such an outdoor floor section 3 includes a support section 40 provided along the edge of the opening 4. In this embodiment, the support portion 40 includes a support rail 40a provided so as to surround the opening 4, and a sealing material 40b provided along the outer surface of the support rail 40a. Furthermore, the upper surface of the support rail 40a is the support surface 15 that contacts the protruding portion 12 of the escape hatch 10M and supports the escape hatch 10M.

[0162] The escape hatch 10M is installed such that a cylindrical main frame 11 is fitted into the opening 4 on the outdoor floor 3, and an overhanging portion 12 rests on and is in contact with the support surface 15. In this embodiment, the floor finishing material 21, which is the finishing part 20, is supported by a base material (not shown) provided on the upper surface of the waterproof sheet 22, as described above. However, in this embodiment, the floor finishing material 21 is further placed on the upper surface of the overhang 12 of the escape hatch 10M.

[0163] Furthermore, the overhang portion 12 of the escape hatch 10M in this embodiment has a projection portion 12b that protrudes downward from its leading edge in the overhang direction. In other words, when viewed from the cylindrical main frame 11 side, this projection portion 12b protrudes from the side of the support portion 40 that is furthest from the cylindrical main frame 11. The outer surface of the support rail 40a constituting the support portion 40, opposite to the opening 4, is the contact surface to which the protruding portion 12b makes contact. In this embodiment, the outer surface of the sealing material 40b is the contact surface. However, this is not the only option; if the sealing material 40b is not used, the size of the support rail 40a, the position of the support rail 40a, or the overhang length of the protruding portion 12 can be adjusted to ensure that the protruding portion 12b makes contact with the outer surface of the support rail 40a. Furthermore, the structure in which the protruding portion 12b contacts the contact surface of the support portion 40 is adopted on all four sides of the escape hatch 10M.

[0164] According to this embodiment, when the escape hatch 10M is installed on the outdoor floor 3, the resulting step height can be minimized to improve the appearance of the outdoor floor 3 and reduce the obstacle to walking. Furthermore, the number of steps formed on the outdoor floor 3 can be reduced as much as possible to improve waterproofing. Furthermore, since the protruding portion 12b contacts the contact surface of the support portion 40, rattling and cracking of the sealing material when the escape hatch 10M is installed on the outdoor floor 3 are suppressed, and a good installation condition of the escape hatch 10M can be maintained.

[0165] <Example 13> In this embodiment, as shown in Figure 19, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10N is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0166] To explain in more detail, first, the opening 4 formed in the outdoor floor section 3 is a circular through-hole. That is, the diameter of the opening 4 is set to be equal from the upper opening to the lower opening. The cylindrical main frame 11 that constitutes the escape hatch 10N is formed in a cylindrical shape corresponding to the shape of the opening 4 and is fitted into the opening 4. The upper end surface of the cylindrical main frame 11 is flush with the upper surface of the outdoor floor 3. The escape hatch 10N is also fixed to the outdoor floor 3 by fixing means (not shown). The escape ladder 13 is attached to the inner surface of the cylindrical main frame 11.

[0167] The top cover 11a of the escape hatch 10N is not fitted into the opening 4, but rests on the upper end surface of the cylindrical main frame 11 and the upper surface of the outdoor floor 3. In other words, the diameter of the top cover 11a is set to be longer than the diameter of the cylindrical main frame 11 and the diameter of the opening 4. Therefore, the portion of the top cover 11a that protrudes laterally from the cylindrical main frame 11 is the protruding portion 12 in this embodiment, and the portion of the upper surface of the outdoor floor 3 that is along the edge of the opening 4 is the support surface 15.

[0168] The floor finishing material 21, which is the finishing part 20, is installed with its lower surface in contact with the upper surface of the outdoor floor part 3, and the floor finishing surface 20a is located below the upper surface of the overhang part 12, which is the peripheral edge of the upper cover 11a. A movement-restricting means 58, made of, for example, EPDM, is provided between the protruding portion 12 of the escape hatch 10N and the floor finishing material 21. The movement-restricting means 58 is provided in a notch formed on the lower side of the peripheral edge of the upper cover 11a. The movement restraining means 58 may be attached to the notch in the top cover 11a, or it may be attached to the upper surface of the outdoor floor 3.

[0169] The end face of the floor finishing material 21 on the side of the upper cover 11a of the escape hatch 10N is the contact surface to which the movement restraining means 58 makes contact and fixes the upper cover 11a of the escape hatch 10N. The floor finishing material 21 corresponds to the shape of the top cover 11a and is in contact with the top cover 11a, so the contact surface is formed in an arc shape. In other words, the floor finishing material 21 has a circular cutout where the top cover 11a is installed. Therefore, when the top cover 11a is fitted into the circular cutout, the top cover 11a comes into contact with the end face of the floor finishing material 21 on the top cover 11a side, and the movement restraining means 58 causes it to be in close contact with the upper surface of the outdoor floor 3 and the floor finishing material 21.

[0170] In this embodiment, the upper cover 11a contacts the contact surface of the floor finishing material, and the movement suppression means 58 is in close contact with the upper surface of the outdoor floor 3 and the floor finishing material 21. This suppresses rattling and cracking of the sealing material when the escape hatch 10N is installed on the outdoor floor 3, and maintains a good installation state of the escape hatch 10N.

[0171] <Example 14> Figure 20 shows an example of a building 1 in which an escape hatch 10 is installed. Building 1 is a four-story house, with the entrance 1a on the first floor and a roof 1b above the fourth floor. Balconies 2 are provided on the second, third, and fourth floors of this house 1. Additionally, a terrace 1c is provided next to the entrance 1a on the first floor. A railing 2a is provided on the balcony 2, while the terrace 1c does not have a railing.

[0172] The floors of balcony 2 and terrace 1c are outdoor floor sections 3, and an opening 4 is formed in the outdoor floor section 3 that constitutes balcony 2. The escape hatch 10 is fitted into the opening 4 and installed in the outdoor floor section 3. The outdoor floor portion 3 of balcony 2 and terrace 1c is finished on the surface by the finishing portion 20, forming a floor finish surface 20a.

[0173] Furthermore, a partition body 8 is installed between the outdoor end of the upper floor outdoor floor section 3 and the outdoor end of the lower floor outdoor floor section 3 located below the upper floor outdoor floor section 3, separating the space between the outdoor side and the building 1 side. In this context, the upper floors refer to the 2nd floor as the upper floor for the 1st floor, the 3rd floor as the upper floor for the 2nd floor, and the 4th floor as the upper floor for the 3rd floor. Furthermore, the partition body 8 is positioned in the width direction (which may be the left-right direction or the opening direction in Figure 20) perpendicular to the overhanging direction of the outdoor floor sections 3 of the upper and lower floors, at a location opposite to the escape ladder 13 when it is extended downwards. In other words, the partition body 8 is positioned on the outdoor side of the descent space 10a in the escape hatch 10.

[0174] As shown in Figures 21 and 22, the partition body 8 is positioned on the outdoor side of the handrail 2a. The upper and lower ends of the partition body 8 are connected and fixed to the outdoor floor 3 via connecting parts 8a and 8b. The partition body 8 is fixed to the outdoor sides of the upper and lower connecting parts 8a and 8b. The connecting sections 8a and 8b are long horizontal members extending in the left-right direction of the building 1. The upper connecting section 8a is fixed to the underside of the hanging wall portion at the outdoor end of the outdoor floor section 3 of the upper floor. The lower connecting section 8b is fixed to the upper surface of the rising wall portion at the outdoor end of the outdoor floor section 3 of the lower floor. A handrail 2a is also provided on the upper surface of this lower connecting section 8b.

[0175] The partition 8 in this embodiment is a fence in which multiple vertical louvers are arranged in parallel with spaces between them. As a result, light, air, and water can pass through the gaps between the multiple vertical louvers, and lines of sight can also pass through. These multiple vertical louver members are connected at their upper ends by an upper connecting part 8a and at their lower ends by a lower connecting part 8b. However, the arrangement is not limited to this; the upper ends and lower ends of the multiple vertical louver members may be connected to each other and to each other by connecting members, creating a pre-assembled panel.

[0176] Furthermore, there are two installation patterns for the escape hatch 10: a first installation pattern, as shown in Figure 21, in which the escape ladder 13 is lowered with its back to the outside, and a second installation pattern, as shown in Figure 22, in which the escape ladder 13 is lowered with its back to the building 1. In the first installation pattern, the escape ladder 13 is attached to the inner surface of the side wall portion on the building 1 side, which is one of the four side walls that make up the cylindrical main frame 11. In this case, as described above, the escape ladder 13 faces away from the outside, so the ground is not visible when descending. However, for some people, not being able to see can lead to feelings of fear, so for such people, the presence of the partition body 8 on the back side can suppress the fear of being at a height. In the second installation pattern, the escape ladder 13 is attached to the inner surface of the outer side wall of the cylindrical main frame 11, which is one of the four side walls that make up the frame. In this case, a feeling of fear is likely to occur because the user's face is turned outwards, but since the partition 8 is in front of them, the fear of being at a height can be suppressed. In addition to these installation patterns, there is another pattern, though not illustrated, in which the escape ladder 13 is lowered with one side of the body facing outdoors and the other side facing building 1. In this installation pattern, looking outwards reveals the ground, which can easily cause fear, but the presence of the partition 8 can be confirmed, and looking towards building 1 hides the ground. Therefore, it is easier to suppress the fear associated with heights.

[0177] Furthermore, in this embodiment, the partition body 8 is positioned in the width direction perpendicular to the overhanging direction of the outdoor floor sections 3 of the upper and lower floors, facing the escape ladder 13 when it is extended downwards, but it is not limited to this. In other words, to put it extremely, the partition body 8 may be provided on the entire inner surface of the frame formed by the outdoor floor section 3 and the left and right outer walls of the building 1.

[0178] Furthermore, although the partition 8 in this embodiment is a fence in which multiple vertical louvers are arranged in parallel with intervals between them, it is not limited to this. That is, it may be a transparent partition such as an acrylic panel, or solar panels may be attached to the surface of the partition.

[0179] According to this embodiment, the feeling of fear when descending the escape ladder 13 provided in the escape hatch 10 can be suppressed, and even if a step is formed when the escape hatch 10 is installed on the outdoor floor 3, it can be made so that walking on the outdoor floor 3 is not hindered.

[0180] <Example 15> In this embodiment, as shown in Figure 23, an opening 4 is formed in the outdoor floor 3, and the escape hatch 10P is fitted into the opening 4 and installed in the outdoor floor 3. The outdoor floor section 3 has its surface finished by the finishing section 20, forming a floor finish surface 20a. In this embodiment, the finishing section 20 is a floor finishing material 21.

[0181] The escape hatch 10P is equipped with overhangs 12 that extend laterally (outward) from the four sides of the upper end of the cylindrical main frame 11. The overhangs 12 are located above the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4.

[0182] The outdoor floor section 3 is either entirely made of wood or includes wooden components. In this embodiment, the floor body 30 is made of wood, and the outdoor floor section 3 is mainly composed of this floor body 30. The floor body 30 is made of wooden building panels. The floor body 30 is covered by a surface layer that constitutes the surface of the floor body 30.

[0183] Such an outdoor floor section 3 includes a support section 40 provided along the edge of the opening 4. In this embodiment, the support portion 40 includes a support rail 40a provided so as to surround the opening 4, and a sealing material 40b provided along the outer surface of the support rail 40a. Furthermore, the upper surface of the support rail 40a is the support surface 15 to which the protruding portion 12 of the escape hatch 10P contacts and to support the escape hatch 10P. The protruding portion 12 is fixed to the support rail 40a by fastening means such as screws.

[0184] In this embodiment, the escape hatch 10P is formed to protrude from the floor surface 20a of the outdoor floor 3 to a predetermined height, and its upper end surface serves as a seat, thus functioning as both an escape hatch and a bench. The height of the escape hatch 10P from the floor surface 20a is set to a height that allows it to be used as a bench. It is preferable to set this height based on standard dimensions such as those specified in JIS standards.

[0185] Furthermore, a partition 8 is installed between the outdoor end of the upper floor outdoor floor section 3 and the outdoor end of the lower floor outdoor floor section 3 located below the upper floor outdoor floor section 3, separating the space between the outdoor side and the building 1 side, thereby reducing the sense of fear experienced by people descending from the upper floor to the lower floor using the escape ladder 13. The partition 8 in this embodiment is a fence in which multiple vertical louvers are arranged in parallel with spaces between them. As a result, light, air, and water can pass through the gaps between the multiple vertical louvers, and lines of sight can also pass through.

[0186] This partition body 8 is positioned in the width direction perpendicular to the overhanging direction of the outdoor floor sections 3 of the upper and lower floors, at a location opposite to the escape ladder 13 when it is extended downwards. In other words, the partition body 8 is positioned on the outdoor side of the descent space 10a in the escape hatch 10P. Furthermore, in this embodiment, as shown in Figure 24, partitions 8 are also placed in the width direction perpendicular to the overhanging direction of the outdoor floor sections 3 of the upper and lower floors, at locations opposite the escape hatch 10P, which is configured as both an escape hatch and a bench. In other words, the partitions 8 are positioned above and below the location where the escape hatch 10P is installed. To put it another way, the partition 8 positioned opposite the escape ladder 13 (descent space 10a) is located on the vertical extension of the partition 8, and the other partition 8 opposite the escape hatch 10P, which is configured as both an escape hatch and a bench, is positioned on the vertical extension of the partition 8 positioned opposite the escape ladder 13 (descent space 10a).

[0187] When partitions 8 are positioned both above and below the location of the escape hatch 10P, they may be installed continuously from the first to the fourth floor of building 1, as shown in Figure 24. On the other hand, in the top floor of a building that adopts such a configuration, only the other partitions 8 that are opposite the escape hatch 10P (in the case of Figure 24, the partition 8 located on the right side of the fourth floor) would normally be installed. However, as in building 1 shown in Figure 24, another partition 8 (in the case of Figure 24, the partition 8 located on the left side of the fourth floor) may be installed on the top floor with design considerations in mind.

[0188] According to this embodiment, it is possible to suppress the feeling of fear when descending the escape ladder 13 provided in the escape hatch 10P, and even if a step is formed when the escape hatch 10P is installed on the outdoor floor 3, it is possible to ensure that walking on the outdoor floor 3 is not hindered.

[0189] <Effects of this embodiment> This embodiment provides the following excellent effects. In other words, the escape hatch 10 is fitted into the opening 4, and the protruding part 12 that extends laterally is placed on the support surface 15 of the outdoor floor 3 from above. This allows the escape hatch 10 to be supported from below by the outdoor floor 3, ensuring that the escape hatch 10 is properly installed. Furthermore, the escape hatch 10 is fitted into the opening 4, and the protruding portion 12 is placed on the support surface 15 of the outdoor floor 3 from above. The movement-restricting means 12b, 50, and 58 restrict the movement of the escape hatch 10 in the lateral direction perpendicular to the direction in which the protruding portion 12 is placed on the support surface 15 of the outdoor floor 3. As a result, the escape hatch 10 is in a state where lateral movement is restricted by the movement-restricting means 12b, 50, and 58 while a load is applied downwards. This suppresses rattling and cracking of the sealing material when the escape hatch 10 is installed on the outdoor floor 3, and maintains a good installation condition.

[0190] Furthermore, since the outdoor floor section 3 has a contact surface where the movement-restraining means 12b, 50, and 58 come into contact and the movement of the escape hatch 10 is restrained, the escape hatch 10 is reliably restrained from moving by the outdoor floor section 3 via the movement-restraining means. As a result, rattling and rupture of the sealing material when the escape hatch 10 is installed on the outdoor floor section 3 are suppressed, and a good installation condition can be maintained.

[0191] Furthermore, the escape hatch 10 is fitted into the opening 4 and includes a hollow cylindrical main frame 11, and the protruding portion 12 is integrally provided at the upper end of the cylindrical main frame 11. As a result, the escape hatch 10 is supported from below by the outdoor floor 3 when the cylindrical main frame 11 is fitted into the opening 4 and the laterally protruding protruding portion 12 rests on the support surface 15, thereby contributing to the installation stability of the escape hatch 10. Furthermore, the movement restraining means 50, which suppresses the movement of the escape hatch 10 in a lateral direction perpendicular to the direction in which the overhang portion 12 is placed on the support surface 15 of the outdoor floor portion 3, is positioned in the gap between the outer surface of the cylindrical main frame 11 and the side surface of the opening 4 and comprises a bracing portion 51 that is movable in the direction away from and towards the cylindrical main frame 11 within the gap, and a reciprocating operation portion 52 that moves the bracing portion 51 back and forth from inside the cylindrical main frame 11. By moving the bracing portion 51 away from the cylindrical main frame 11 according to the operation of the reciprocating operation portion 52 and pressing it against the side surface of the opening 4, the cylindrical main frame 11 can be fixed to the side surface of the opening 4. As a result, the escape hatch 10 can be prevented from moving in a lateral direction perpendicular to the direction in which the overhang portion 12 is placed on the support surface 15 of the outdoor floor portion 3, thereby suppressing rattling and rupture of the sealing material when the escape hatch 10 is installed on the outdoor floor portion 3, and maintaining a good installation condition.

[0192] Furthermore, since the upper surface of the support portion 40, which is positioned along the edge of the opening 4, is the support surface 15 that the protruding portion 12 of the escape hatch 10 contacts, the escape hatch 10 is fitted into the opening 4, and the laterally protruding portion 12 rests on the support portion 40, thereby being supported from below by the outdoor floor portion 3, which contributes to the installation stability of the escape hatch 10. Furthermore, the outer surface of the support portion 40 opposite to the opening 4 is the contact surface, and the protruding portion 12 of the escape hatch 10 has a projection 12b that protrudes downward from its tip in the protruding direction, and this projection 12b is a movement-restricting means that contacts the outer surface of the support portion 40, so that the protruding portion 12 and the projection 12b can be hooked onto the support portion 40 as if by a hook, thereby suppressing the lateral movement of the escape hatch 10. This suppresses rattling and rupture of the sealing material when the escape hatch 10 is installed on the outdoor floor 3, and maintains a good installation condition.

[0193] In addition, a portion of the upper surface of the outdoor floor portion 3 along the edge of the opening 4 is defined as the support surface 15, and the overhanging portion 12 of the evacuation hatch 10 is supported by the outdoor floor portion 3 with the lower surface in contact with the support surface 15. Therefore, when the cylindrical main body frame 11 of the evacuation hatch 10 is fitted into the opening 4 and the overhanging portion 12 that projects laterally is placed on the support surface 15, the evacuation hatch 10 can be supported from below by the outdoor floor portion 3, contributing to the installation stability of the evacuation hatch 10. Furthermore, a floor finishing material 21 is provided on the upper surface of the outdoor floor portion 3, and the movement restraining means 58 is provided between the overhanging portion 12 and the floor finishing material 21, with the end face on the side of the overhanging portion 12 of the floor finishing material 21 being defined as the contact surface. Thus, the movement restraining means 58 provided between the overhanging portion 12 and the floor finishing material 21 and the floor finishing material 21 can restrain the evacuation hatch 10 from moving in the lateral direction perpendicular to the direction in which the overhanging portion 12 is placed on the support surface 15 of the outdoor floor portion 3. As a result, it is possible to suppress the occurrence of rattling and the breakage of the sealing material when the evacuation hatch 10 is installed on the outdoor floor portion 3, and maintain a good installation state.

Description of Reference Numerals

[0194] 1 Building 2 Balcony 2a Handrail 3 Outdoor Floor Portion 3a Support Portion 4 Opening 5 Outer Wall 8 Partition Body 10 Evacuation Hatch [[ID=2,6]] 10a Lowering Space 11 Cylindrical Main Body Frame 11a Upper Cover 12 Overhanging Portion 12a Surface 13 Evacuation Ladder 15 Support Surface 20 Finishing Portion 20a Floor Finishing Surface 21 Floor Finishing Material 22 Waterproof Sheet 30 Floor Main Body 40 Support Portion 40a Receiving Rail 40b Sealing Material 41 Support section 41a Fixing material 42 Inclined frame member 42a Upper surface (inclined surface) 43 Support section (square tube) 43a Fixing material 50 Fixing means (movement restraining means) 51 Protruding portion 51a Anti-slip portion 52 Forward and backward operation section 53 Fixing means 54 Fixing base member 56 Fixing means 58 Movement restraining means

Claims

1. An escape hatch with an escape ladder that extends downwards, An outdoor floor section having an opening into which the aforementioned escape hatch is fitted, It includes a movement restraining means for restraining the movement of the escape hatch fitted into the opening, The escape hatch has an overhang that extends laterally and rests on the outdoor floor, The outdoor floor section includes a support section arranged along the edge of the opening, The upper surface of the support portion is a support surface that contacts the protruding portion of the escape hatch and supports the escape hatch, and the outer surface of the support portion opposite to the opening is a contact surface that contacts the movement-restricting means and restricts the movement of the escape hatch. The escape hatch is fitted into the opening, and the protruding portion is placed on the support surface of the outdoor floor from above. An installation structure for an escape hatch, characterized in that the protruding portion of the escape hatch has a projection that protrudes downward from its leading edge in the direction of protrusion, and the projection is the movement-restricting means that contacts the outer surface of the support portion, and the projection, which is the movement-restricting means, restricts the movement of the escape hatch in a lateral direction perpendicular to the direction in which the protruding portion is placed on the support surface of the outdoor floor portion.

2. An escape hatch with an escape ladder that extends downwards, An outdoor floor section having an opening into which the aforementioned escape hatch is fitted, It includes a movement restraining means for restraining the movement of the escape hatch fitted into the opening, The escape hatch has an overhang that extends laterally and rests on the outdoor floor, The portion of the upper surface of the outdoor floor that is along the edge of the opening is the support surface to which the protruding portion of the escape hatch abuts and which supports the escape hatch. The escape hatch is fitted into the opening and supported by the outdoor floor with the lower surface of the protruding portion in contact with the support surface of the outdoor floor. A floor finishing material is provided on the upper surface of the aforementioned outdoor floor section. The movement-restricting means is provided between the overhang and the floor finishing material. An escape hatch installation structure characterized in that the end face of the floor finishing material on the side of the overhang is a contact surface to which the movement-restricting means comes into contact and the movement of the escape hatch is restricted, and the movement-restricting means restricts the movement of the escape hatch in a lateral direction perpendicular to the direction in which the overhang is placed on the support surface of the outdoor floor.

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