Foundation inspection hatch

Abstract

To enable a foundation inspection port to be easily attached to a foundation.SOLUTION: A foundation inspection port 10 is attached in use to an opening 2 formed in a foundation 1, and comprises: a frame 11 that includes a main frame 12 to be arranged in the opening 2, and a flange 13 formed at one end of the main frame 12; and a lid 21 capable of fitting into an opening part 15 of the frame 11. The flange 13 faces a peripheral edge of the opening 2 of the foundation 1 in a state where the main frame 12 is arranged in the opening 2 of the foundation 1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This invention is a building foundation inspection In the mouth Regarding. [Background technology]

[0002] In recent years, with the increasing trend toward energy conservation in homes, insulation is being installed all around the inside surface of the foundation that separates the underfloor area of ​​the bathroom, etc., in order to improve the thermal insulation performance of the bathroom section, etc. However, it is necessary to provide an opening (a manhole or inspection hatch) in the foundation to allow inspection of the underfloor area, and insulation cannot be installed in this opening.

[0003] Therefore, in order to block ventilation through openings in the foundation and achieve insulation, a foundation inspection hatch has been proposed in which an insulating cover can be attached and detached to the opening of a frame body fixed to the opening in the foundation (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3078345 Summary of the Invention

[0005] The foundation inspection hatch of the present invention is a foundation inspection hatch used in a foundation that defines a space below a bathroom, and includes a frame body having a substantially rectangular opening, Made of foamed synthetic resin,and a lid capable of airtightly closing the opening of the frame. The inner peripheral surface of the upper part of the opening of the frame is formed with a first inner peripheral surface, a second inner peripheral surface positioned at a step position lower than the first inner peripheral surface and closer to the bathroom lower space than the first inner peripheral surface, and a step surface connecting the first inner peripheral surface and the second inner peripheral surface. The outer peripheral surface of the upper part of the lid is formed with a lid-side step surface facing the step surface, and a bathroom-side outer peripheral surface connecting to the lid-side step surface and extending toward the bathroom lower space and facing the second inner peripheral surface. The bathroom-side outer peripheral surface of the lid has an inclined surface that slopes downward toward the bathroom lower space. When the opening of the frame is closed with the lid, the step surface of the frame and the lid-side step surface of the lid abut against each other to airtightly close the upper part of the opening, and the second inner peripheral surface of the frame and the inclined surface of the lid do not abut against each other on the bathroom lower space side.

[0006] Furthermore, the present invention In the above, it is preferable that the second inner peripheral surface of the frame is a horizontal surface. . [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a partial perspective view of a building structure to which a foundation inspection hatch according to one embodiment of the present invention is attached. [Figure 2] 2(a) is a front view of the building structure shown in FIG. 1, and FIG. 2(b) is a plan view of the building structure shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2(a). [Figure 4] FIG. 2(a) is a perspective view of the frame shown in FIG. 1, and FIG. 2(b) is an exploded perspective view of the frame. [Figure 5] FIG. 2 is a front view of the frame shown in FIG. [Figure 6] 6(a) is a perspective view of the lid shown in FIG. 1, and FIG. 6(b) is a perspective view of the lid shown in FIG. 6(a) as seen from the opposite side. [Figure 7] FIG. 2(a) is a perspective view of the foundation shown in FIG. 1, and FIG. 2(b) is a perspective view showing a state in which a foundation inspection hatch is attached to an opening in the foundation. DETAILED DESCRIPTION OF THE INVENTION

[0011] A building structure 100 equipped with a foundation inspection hatch 10 according to one embodiment of the present invention will be described below with reference to FIG.

[0012] As shown in FIGS. 1 and 2 , the building structure 100 in this embodiment includes a foundation 1 (e.g., a strip foundation) that is long in the longitudinal direction A; a foundation inspection hatch 10 that is attached to an opening 2 (see FIG. 7(a)) formed in the foundation 1; a base 3 disposed on the foundation 1 and the foundation inspection hatch 10; multiple foundation gaskets 4 disposed between the base 3 and the foundation 1; and a foamed synthetic resin 5 filled between the opening 2, the base 3, and the frame 11 of the foundation inspection hatch 10. The building structure 100 shown in FIG. 1 illustrates a portion of a foundation structure that defines the space below a bathroom using a modular bath. Along the width direction B (a direction perpendicular to the longitudinal direction A) of the rising portion 1b of the foundation 1, the left side of the rising portion 1b in the drawing is the inside, and the right side is the outside. Therefore, in the following description, one side of the width direction B may be referred to as the outside, and the other side as the inside.

[0013] The foundation 1 is composed of a footing 1a and a rising portion 1b erected upward from the footing 1a. The base 3 and foundation packing 4 are fixed to the rising portion 1b with anchor bolts, square washers, and nuts (none of which are shown) planted in the foundation 1. A heat insulating material 6 is provided on the entire inner surface 1c of the rising portion 1b. The heat insulating material 6 may also be provided on the outer surface 1d of the rising portion 1b. As shown in FIG. 7(a), the rising portion 1b has an opening 2 formed by cutting out a portion midway in the longitudinal direction A, and the rising portions 1b are divided so as to be spaced apart from each other in the longitudinal direction A.

[0014] As shown in Figures 1 to 3, the foundation inspection hatch 10 has a frame body 11 and a lid body 21. As shown in Figures 3 and 4, the frame body 11 has a frame main body 12 configured to be able to be placed in the opening 2 of the foundation 1, a flange 13, and a heat insulator 14. As shown in Figures 2 to 4, the frame main body 12 has a rectangular cylindrical shape, and is formed so that its width in the longitudinal direction A and its height in the vertical direction C are slightly smaller than those of the opening 2. Furthermore, as shown in Figure 7(b), when the frame main body 12 is placed in the opening 2, it has an opening 15 located radially inward from the opening 2. The opening direction of the opening 15 is parallel to the width direction B of the rising portion 1b of the foundation 1.

[0015] The frame body 12 is made of synthetic resin and has an inner peripheral surface 16 that defines an opening 15, as shown in Fig. 4. The opening 15 is defined by a first opening 15a and a second opening 15b that are connected to each other. The second opening 15b is located more inward than the first opening 15a in the width direction B and has a diameter that is slightly smaller than that of the first opening 15.

[0016] 4 and 5, the inner circumferential surface 16 has a first inner circumferential surface 16a that constitutes the first opening 15a, a second inner circumferential surface 16b that constitutes the second opening 15b, and a stepped surface 16c that connects the first inner circumferential surface 16a and the second inner circumferential surface 16b. The stepped surface 16c is a surface that stands upright so as to face the width direction B, and is formed in an inverted U shape as shown in FIG. 5. The lower surface portions of the first inner circumferential surface 16a and the second inner circumferential surface 16b are continuously connected along the width direction B.

[0017] As shown in FIG. 5 , a packing 19 made of an elastic material such as rubber is attached to the inner peripheral surface 16. The packing 19 is composed of a first packing 19a and a second packing 19b. The first packing 19a is attached to an upper portion of the stepped surface 16c extending along the longitudinal direction A and two left and right portions extending along the up-down direction C, forming an inverted U shape. The second packing 19b is attached to the lower surface 16a1 and extends along the longitudinal direction A. Both ends of the second packing 19b in the longitudinal direction A are located near both ends of the first packing 19a. By providing such a packing 19, when the opening 15 is closed with the cover 21, the gap between the cover 21 and the frame 11 is almost entirely filled in the circumferential direction. This further improves the airtightness between the frame 11 and the cover 21. When the lid 21 closes the opening 15 of the frame 11, the first packing 19a may be provided on the surface of the lid 21 facing the stepped surface 16c, and the second packing 19b may be provided on the underside 21a of the lid 21. The packings 19 may also be provided on both the frame 11 and the lid 21. In these cases as well, the airtightness between the frame 11 and the lid 21 is further improved.

[0018] As shown in FIG. 4, the frame body 12 has two recesses (first engagement portions: engagement recesses) 17 formed on the lower surface 16a1 of the first inner circumferential surface 16a, and as shown in FIG. 3, a protrusion (second engagement portion) 18 formed on the upper surface 16a2 of the first inner circumferential surface 16a. The two recesses 17 are disposed near both ends of the lower surface 16a1 in the longitudinal direction A and open upward. That is, the two recesses 17 are disposed spaced apart from each other along the longitudinal direction A (the extension direction of the foundation 1). As shown in FIGS. 3 and 5, the protrusion 18 is formed to protrude downward from the upper surface 16a2 and extend along the longitudinal direction A. Furthermore, the protrusion 18 is disposed at the center of the upper surface 16a2 with respect to the longitudinal direction A. That is, the protrusion 18 is disposed at the center of the opening 15 with respect to the longitudinal direction A.

[0019] 4(b), a plurality of ribs 12b are formed on the outer peripheral side surface 12a of the frame body 12. This improves the strength of the frame body 12.

[0020] The flange 13 is made of synthetic resin and, as shown in FIG. 4 , is formed so as to protrude from the outer peripheral side surface 12a of the frame body 12 at one end (outer end) in the opening direction of the frame body 12, i.e., in the width direction B. In this embodiment, the flange 13 has an inverted U-shape and is integrally formed on the top edge and left and right edges of the frame body 12. The flange 13 may be, for example, annular, U-shaped, or formed on the left and right edges of the frame body 12 to match the shape of the opening 2, and these may be formed continuously or discontinuously, and can be modified as appropriate. The flange 13 may also be formed midway in the width direction B of the frame body 12.

[0021] As shown in FIGS. 1 to 3, the flange 13 is sized to face the rising portion 1b of the foundation 1, which is the periphery of the opening 2, when the frame body 12 is placed in the opening 2. As shown in FIG. 4(b), the flange 13 has a plurality of ribs 13b formed on an opposing surface 13a facing the rising portion 1b. This improves the strength of the flange 13. The opposing surface 13a has a protrusion 13c extending in an inverted U shape. The protrusion 13c is formed by recessing the surface of the flange 13 opposite the opposing surface 13a, causing it to partially protrude from the opposing surface 13a. The width of the tip surface 13d of the protrusion 13c is greater than the width of the tip surface of the rib 13b. The tip surface 13d of the protrusion 13c and the tip surface of the rib 13b are arranged on approximately the same plane. Therefore, when attaching the frame body 11 to the opening 2, the tip surface 13d of the protrusion 13c and the tip surface of the rib 13b can be brought into contact with the rising portion 1b, allowing the frame body 11 to be stably positioned in the opening 2. Furthermore, when temporary fixing adhesive is applied to the portion of the rising portion 1b facing the flange 13, the tip surface 13d is formed wider than the rib 13b, allowing the frame body 11 to be effectively adhered to the foundation 1. Furthermore, since multiple ribs 13b are formed on the facing surface 13a, the adhesive area with the temporary fixing adhesive is increased. Therefore, the frame body 11 can be more effectively adhered to the foundation 11.

[0022] The insulator 14 is made of foamed synthetic resin (e.g., polystyrene foam) and is formed into a rectangular tube shape as shown in FIG. 4 . The insulator 14 is attached to the outer peripheral side surface 12a of the frame body 12 and covers the entire upper surface of the outer peripheral side surface 12a and the other end (inner end) of the outer peripheral side surface 12a in the width direction B around the entire periphery. This improves the thermal insulation of the foundation inspection hatch 10. Therefore, the underfloor insulation performance of the retrofit-type foundation inspection hatch 10 can be improved. Furthermore, the insulator 14 is attached to the outer peripheral side surface 12a of the frame body 12 so that the ribs 12b on the left and right outer peripheral side surfaces 12a of the frame body 12 are exposed. This improves adhesion between the insulator 14 and the foamed synthetic resin 5 that fills the gap between the frame body 11 and the opening 2 after the frame body 11 is attached to the opening 2 in the foundation 1.

[0023] The lid 21 is made of a foamed synthetic resin (for example, polystyrene foam) and has heat insulating properties. As shown in FIGS. 1 to 3, the lid 21 is formed in a substantially square plate shape that can be fitted into the opening 15. As shown in FIG. 6(a), the lid 21 has two protrusions (first engaged portions: engaging protrusions) 22 that protrude downward from the lower surface 21a. These two protrusions 22 are formed in shapes and positions that allow them to fit into and engage with the two recesses 17 when the lid 21 is placed in the opening 15. In other words, the two protrusions 22 are also arranged at a distance from each other along the longitudinal direction A.

[0024] 1 to 3, the lid body 21 has a grip portion 23 that protrudes from the outer surface 21c that is exposed to the outside when the lid body 21 is attached to the frame body 11. As shown in FIG. 6(a), the grip portion 23 is located slightly below the upper end of the lid body 21 and at the center in the longitudinal direction A, and extends along the longitudinal direction A.

[0025] A locking member 25 is provided at the upper end of the lid body 21. When the two protrusions 22 of the lid body 21 are fitted into the two recesses 17 and the upper end of the lid body 21 is pushed inward along the width direction B, the locking member 25 engages with the protrusions 18 of the frame 11 to lock the lid body 21. The locking member 25 is made of synthetic resin and is disposed at the center of the lid body 21 in the longitudinal direction A. The locking member 25 has an attachment portion 26 attached to the upper end of the lid body 21, an elastic support portion 27 that bends and extends from the attachment portion 26, and a protrusion (second engaged portion) 28 formed at the tip of a corner of the elastic support portion 27.

[0026] 6(a), the elastic support portion 27 is formed above the grip portion 23, extending outward from the attachment portion 26 in the width direction B, then bending downward once, and again extending outward in the width direction B. The protrusion 28 is formed at the upper end of the corner of the portion of the elastic support portion 27 that bends downward, extending in the longitudinal direction A.

[0027] When closing the opening 15 with the lid 21, the two convex portions 22 of the lid 21 are fitted into the two concave portions 17, and the upper end of the lid 21 is pushed inward along the width direction B. As a result, the elastic support portions 27 are initially bent downward so that the convex portions 28 overcome the convex portions 18, and then return to their original position. That is, the elastic support portions 27 are elastically deformable so as to engage with the convex portions 18. As a result, the convex portions 28 and the convex portions 18 engage with each other, and the lid 21 is locked to the frame 11. At this time, the frame 11 has two concave portions 17 and one convex portion 18, and the lid 21 has two convex portions 22 and one convex portion 28, so that the lid 21 can be attached to the opening 15 of the frame 11 by engaging with each other at three locations. This allows the lid 21 to be fixed to the frame 11 without any rattle, improving the airtightness between the frame 11 and the lid 21. On the other hand, when the tip 27a of the elastic support part 27 is pressed downward so as to approach the grip part 23 while the lid body 21 is locked to the frame body 11, the elastic support part 27 bends downward so as to release the engagement between the protrusion 28 and the protrusion 18, and the protrusion 28 moves downward. Then, when the engagement between the protrusion 28 and the protrusion 18 is released, the grip part 23 is gripped and the upper end part of the lid body 21 is pulled outward along the width direction B, whereby the lid body 21 can be removed from the frame body 21.

[0028] Next, a method for attaching the foundation inspection hatch 10 to the foundation 1 will be described below with reference to FIG.

[0029] As shown in FIG. 7(a), first, a foundation 1 is formed having a rising portion 1b with an opening 2 formed midway in the longitudinal direction A. Then, as shown in FIG. 7(b), a heat insulating material 6 is provided on the entire inner surface 1c of the rising portion 1b. The heat insulating material 6 may be provided by spraying urethane foam or by attaching a polystyrene foam plate. The heat insulating material 6 may also be provided after a foundation inspection hatch 10 has been attached to the opening 2.

[0030] Next, the frame body 11 of the foundation inspection hatch 10 is installed in the opening 2 formed in the rising portion 1b of the foundation 1 (frame body installation process). At this time, the frame body 12 is placed in the opening 2 while the tip surface 13d of the flange 13 and the tip surfaces of the multiple ribs 13b abut against the outer surface 1d of the rising portion 1b. In other words, the flange 13 of the frame body 11 faces the peripheral edge of the opening 2 of the rising portion 1b. Alternatively, a temporary adhesive may be applied to the outer surface 1d of the rising portion 1b, which is the peripheral edge of the opening 2, before the frame body 11 is installed in the opening 2. This effectively bonds the flange 13 of the frame body 11 to the rising portion 1b via the temporary adhesive, preventing misalignment of the frame body 11. After this, the lid body 21 is attached to the frame body 11 so that the opening 15 of the frame body 11 is closed by the lid body 21. The frame 11 may be placed over the opening 2 with the lid 21 attached to the frame 11 so that the opening 15 of the frame 11 is closed by the lid 21 .

[0031] Next, foamed synthetic resin 5 (e.g., urethane foam) is sprayed between the opening 2 of the foundation 1 and the frame 11, and onto the top surface of the frame 11 (the portion facing the base 3) (filling process). This allows the foamed synthetic resin 5 to continuously connect the insulation material 6 provided on the rising portion 1b of the foundation 1 to the insulation material 14 and cover 21 of the frame 11. In other words, the entire periphery of the underfloor section can be covered with insulation, thereby improving the insulation performance of the underfloor section in the retrofit-type foundation inspection hatch 10. The foamed synthetic resin 5 may also be filled between the flange 13 and the outer surface 1d of the rising portion 1b. In this case, the flange 13 has multiple ribs 13b, which increases the adhesive area with the foamed synthetic resin 5, allowing the frame 11 to be more effectively attached to the foundation 1. In this way, the installation of the foundation inspection hatch 10 into the opening 2 of the foundation 1 is completed. After this, the foundation packing 4 and the base 3 are fixed onto the rising portion 1b, completing the building structure 100 shown in FIG. 1.

[0032] As described above, the foundation inspection hatch 10 and its installation method of this embodiment make it possible to retrofit the foundation inspection hatch 10 to the opening 2 formed when the foundation was formed. This eliminates the need to embed the frame 11 of the foundation inspection hatch 10 into the rising portion 1b of the foundation 1 when the foundation was formed, making it possible to easily install the foundation inspection hatch 10 to the foundation 1.

[0033] Furthermore, because the frame body 11 has the flange 13, even if the opening 2 formed in the foundation 1 is slightly larger than the frame body 12, when the foundation inspection hatch 10 is attached to the opening 2 in the foundation 1, the flange 13 can face the peripheral edge of the opening 2 in the foundation 1. In other words, the tolerance range for the dimensions of the opening formed in the foundation 1 is widened, making it easier to form the opening 2 in the foundation 1.

[0034] Furthermore, since the frame 11 has the recessed portion 17 and the protruding portion 18, and the lid 21 has the protruding portions 22, 28, the protruding portions 22, 28 can be engaged with the recessed portion 17 and the protruding portion 18, thereby closing the opening 15 with the lid 21. Furthermore, since the locking member 25 can disengage the protruding portion 28 from the protruding portion 18 by displacing the elastic support portion 27, the lid 21 closing the opening 15 can be easily removed. Therefore, the lid can be easily opened and closed during inspection in the narrow space under the floor.

[0035] While preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various modifications are possible within the scope of the claims. The flange 13 of the frame 11 in the above-described embodiments may not have multiple ribs 13b. The frame body 12 of the frame 11 may have a shape other than a rectangular tube, for example, a cylindrical shape. The frame body 12 may not have a lower portion extending in the longitudinal direction A. In other words, the frame body 12 is not particularly limited to a cylindrical shape. The frame 11 may not have the heat insulator 14. The frame 11 may be made of a metal material. The lid 21 may be made of a metal material or a synthetic resin material.

[0036] Alternatively, a convex portion may be formed on the frame 11 as a first engaging portion, and a concave portion into which the convex portion fits may be formed on the lid 21 as a first engaged portion. Alternatively, a concave portion may be formed on the frame 11 as a second engaging portion, and the convex portion 28 may fit into the concave portion. Alternatively, the lid 21 may have a concave portion as a second engaged portion into which the convex portion 18 fits. Alternatively, the frame 11 may not be provided with a first engaging portion and a second engaging portion, and the lid 21 may not be provided with a first engaged portion and a second engaged portion. Alternatively, the locking member 25 may not be provided.

[0037] Alternatively, one first engaging portion and one first engaged portion may be provided on each of the frame 11 and the lid 21. Also, the packing 19 may not be provided. In this case, when the lid 21 is attached to the frame 11 to close the opening 15, it is preferable that the outer peripheral surface of the lid 21 and the inner peripheral surface of the frame 11 that face each other abut against each other. [Explanation of symbols]

[0038] 1 Basics 2 aperture 10 Foundation inspection hatch 11 Frame 12 Frame body 12a Outer side 13 Flange 13a Opposite side 13b flange 14 Insulator 16 Inner surface 16a1 Bottom surface 16a2 top surface 17 Recess (first engagement portion: engagement recess) 18 convex portion (second engagement portion) 19 Gasket 21 Lid 21a Bottom side 22 convex portion (first engaged portion: engaging convex portion) 25 Locking member 27 Elastic support part 28 convex portion (second engaged portion)

Claims

1. A foundation inspection hatch used in a foundation that defines a space below a bathroom, a frame body having a substantially rectangular opening; a lid body made of foamed synthetic resin and capable of airtightly closing the opening of the frame body, The upper inner circumferential surface of the opening of the frame body is formed with a first inner circumferential surface, a second inner circumferential surface located at a step position lower than the first inner circumferential surface and closer to the lower space of the bathroom than the first inner circumferential surface, and a step surface connecting the first inner circumferential surface and the second inner circumferential surface, The upper outer peripheral surface of the lid body is formed with a lid-side stepped surface opposite the stepped surface, and a bathroom-side outer peripheral surface connected to the lid-side stepped surface and extending toward the lower space of the bathroom and opposite the second inner peripheral surface, The bathroom-side outer peripheral surface of the lid body has an inclined surface that slopes downward toward the lower space of the bathroom, A foundation inspection hatch characterized in that when the opening of the frame body is closed with the lid body, the step surface of the frame body and the lid side step surface of the lid body abut to hermetically close the upper side of the opening, and the second inner surface of the frame body and the inclined surface of the lid body do not abut on the lower space side of the bathroom.

2. A foundation inspection hatch as described in claim 1, characterized in that the second inner peripheral surface of the frame body is a horizontal surface.

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