JP7156604B2 - Underfloor heat insulation structure and underfloor heat insulation method - Google Patents

Description

The present invention relates to an underfloor heat insulation structure and an underfloor heat insulation method.

Patent Document 1 below discloses that in a steel house, the lower part of a lip channel steel joist (floor beam) provided under the floor is surrounded by a heat insulating material unit having a channel-shaped cross section, whereby the joist is Techniques have been disclosed for ensuring heat insulation under the floor by preventing the underfloor from coming into contact with the outside air.

More specifically, the joist is formed of lip channel steel, and the heat insulating material unit is formed with a channel-shaped cross section and has elasticity. The heat insulating material unit has a hook portion that is engaged by coming into downward contact with the end surface of a lip portion formed on one end side and the lower side in the width direction substantially orthogonal to the longitudinal direction of the joists. When the hook portion comes into contact with the end surface of the lip portion formed on the lower side of the joist, the state is maintained (engaged) by the elastic force of the heat insulating material unit. ing.

JP-A-11-159019

In the prior art described above, the heat insulating material unit is engaged with the lip portion on one end side of the joist in the width direction. On the other hand, the center of gravity of the heat insulating material unit is shifted in the width direction of the joist with respect to the hook portion engaged with the lip portion. In other words, a moment around the hook portion acts on the heat insulating material unit.

In the prior art, the elastic force of the insulation unit is used to bring the insulation unit into close contact with the web surface, lower flange surface, and lip surface of the outer periphery of the joist. Thus, the rotation of the heat insulating material unit is suppressed, and the heat insulating material unit is stably supported.

However, joists and insulation units have dimensional tolerances in manufacturing, and there is a possibility that the insulation units do not adhere to the joists. As a result, the engagement state of the heat insulating material unit is not stable, and the heat insulating material unit may fall, or a gap may be generated between the heat insulating material unit and the joist. there is a possibility that it cannot be done.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an underfloor heat insulation structure and an underfloor heat insulation method capable of ensuring underfloor heat insulation.

An underfloor heat insulating structure according to a first aspect of the present invention includes a steel floor beam disposed under a floor and supporting a floor plate and a first underfloor heat insulating material; and a heat insulating material support for supporting the beam heat insulating material covering the floor beam from both sides in the width direction perpendicular to the longitudinal direction of the floor beam on the lower side of the floor beam.

An underfloor heat insulating structure according to a first aspect of the present invention includes a steel floor beam and a heat insulating material support fixed to the floor beam. The floor beam is arranged under the floor and supports the floor plate and the first underfloor heat insulating material, and the heat insulating material supports cover the floor beam from both sides in the width direction of the floor beam including the lower surface of the floor beam. The material is supported on the lower side of the floor beam.

Thus, in this aspect, since the floor beam is covered with the beam heat insulating material from both sides in the width direction of the floor beam including the lower surface of the floor beam, the floor beam is not exposed to the outside air. can be made Therefore, in this aspect, it is possible to take measures against heat bridging, and to ensure heat insulation under the floor.

Further, in this aspect, the beam heat insulating material is supported on the lower side of the floor beam by the heat insulating material support. That is, the heat insulating material support receives the load of the beam heat insulating material from above. For this reason, the support state of the beam heat insulating material is more stable than, for example, when the beam heat insulating material is suspended from above and supported by the heat insulating material support.

It should be noted that "supporting the beam heat insulating material on the lower side of the floor beam" in this aspect indicates a configuration in contrast to the case where the beam heat insulating material is supported from above, such as by hanging the beam heat insulating material. However, it is not necessarily the case that the insulating material support is in contact with the lower surface of the beam insulating material to support the beam insulating material from the lower surface side. For this reason, for example, the heat insulating material support is in contact with the intermediate portion of the beam heat insulating material in the plate thickness direction, and the beam heat insulating material is supported from below at the plate thickness direction intermediate portion of the beam heat insulating material. can be

The underfloor heat insulation structure according to a second aspect of the present invention is the underfloor heat insulation structure according to the first aspect of the present invention, wherein the heat insulating material supporting member is arranged to face the lower surface of the floor beam and the beam heat insulating material is provided.

In the underfloor heat insulation structure according to the second aspect of the present invention, the heat insulating material support is provided with a mounting piece arranged to face the lower surface of the floor beam, and between the floor beam and the mounting piece By arranging the beam heat insulating material, the beam heat insulating material is supported from below via the mounting piece of the heat insulating material support.

The underfloor heat insulation structure according to a third aspect of the present invention is the underfloor heat insulation structure according to the second aspect of the present invention, wherein the beam heat insulation material is an underfloor heat insulation structure fitted between the floor beam and the mounting piece. It is composed of materials.

In the underfloor heat insulating structure according to the third aspect of the present invention, the beam heat insulating material is configured to include the under beam heat insulating material fitted between the floor beam and the mounting piece, and the underfloor heat insulating material is the floor beam. to support the under-beam heat insulating material more stably than when the under-beam heat insulating material is simply disposed between the floor beam and the mounting piece by being fitted between the floor beam and the mounting piece. becomes possible.

An underfloor heat insulating structure according to a fourth aspect of the present invention is the underfloor heat insulating structure according to the third aspect of the present invention, wherein the underfloor heat insulating material has a support piece supporting the mounting piece extending in the width direction of the floor beam. and a contact portion located behind the notch along the direction of entry of the support piece and with which the mounting piece abuts. ing.

In the underfloor heat insulating structure according to the fourth aspect of the present invention, the underfloor heat insulating material is configured to include the notch portion and the contact portion. The notch portion is cut so that the support piece that supports the mounting piece can enter along the width direction of the floor beam, and the abutting portion is the notch portion along the approach direction of the support piece. It is positioned at the back and is designed to abut against the mounting piece.

That is, the under-beam heat insulating material is placed on the heat insulating material support via the placing piece in a state where the contact portion of the under-beam heat insulating material is in contact with the placing piece of the heat insulating material support. Become. In this way, by forming a cutout portion in the under-beam heat insulating material and bringing the mounting piece into contact with the abutment portion located at the back of the cutout portion, the heat insulating material can be , it becomes possible to position the under-beam heat insulating material along the width direction and the longitudinal direction of the floor beam.

An underfloor heat insulating structure according to a fifth aspect of the present invention is the underfloor heat insulating structure according to the fourth aspect of the present invention, wherein the underfloor heat insulating material has a plate-like shape, and the inner surface of the notch portion is used as a reference. A first main body portion that constitutes the side on which the contact portion is provided along the width direction of the floor beam, and a second main body portion that constitutes the side on which the notch portion is provided, The beam heat insulating material includes a first beam side heat insulating material disposed between the first underfloor heat insulating material and the first main body portion and in contact with a first side surface of the floor beam, and the first underfloor heat insulating material. and a second beam side heat insulating material disposed between the second body portions and in contact with the second side surface of the floor beam.

In the underfloor heat insulating structure according to the fifth aspect of the present invention, the underfloor heat insulating material has a plate shape, and the abutting portion is provided along the width direction of the floor beam with reference to the inner surface of the notch portion. and a second main body portion forming the side on which the notch portion is provided. In addition, the beam heat insulating material further includes a first beam side heat insulating material and a second beam side heat insulating material. The second beam side heat insulating material is arranged between the first underfloor heat insulating material and the second main body portion and contacts the second side surface of the floor beam. It's like

That is, in this aspect, the beam heat insulating material includes the under beam heat insulating material, the first beam side heat insulating material, and the second beam side heat insulating material. Then, the lower surface of the floor beam is covered with the under beam heat insulating material, the first side surface of the floor beam is covered with the first beam side heat insulating material, and the second side surface of the floor beam is covered with the second beam side heat insulating material. It has become.

In this way, since the beam heat insulating material is composed of a plurality of heat insulating materials, it is possible to arrange the beam heat insulating material in a state of being in close contact with the floor beam compared to the case where the beam heat insulating material is composed of a single heat insulating material. can be done. Further, in this aspect, the first beam-side heat insulating material and the second beam-side heat insulating material are placed on the under-beam heat insulating material placed on the heat insulating material support. That is, the first beam-side heat insulating material and the second beam-side heat insulating material are placed on the heat insulating material support via the under-beam heat insulating material. For this reason, in this aspect, the support state of the beam heat insulating material is more stable than in the case where the beam heat insulating material is suspended from above and supported by the heat insulating material support.

An underfloor heat insulating structure according to a sixth aspect of the present invention is the underfloor heat insulating structure according to the fifth aspect of the present invention, wherein the underfloor heat insulating material is formed as separate members, and the underfloor heat insulating material and the first beam are formed as separate members. It is composed of a side heat insulating material and the second beam side heat insulating material.

In the underfloor heat insulation structure according to the sixth aspect of the present invention, the underfloor heat insulation is composed of the under-beam heat insulation, the first beam side heat insulation, and the second beam side heat insulation, which are formed as separate members. , in the under-beam heat insulating material, the adhesion to each surface of the floor beam is improved compared to the case where the under-beam heat insulating material, the first beam side heat insulating material, and the second beam side heat insulating material are integrally formed. can be improved.

An underfloor heat insulating structure according to a seventh aspect of the present invention is the underfloor heat insulating structure according to the sixth aspect of the present invention, wherein the first beam side heat insulating material is disposed between the first underfloor heat insulating material and the first main body portion. The second beam-side heat insulating material is fitted between the first underfloor heat insulating material and the second body portion.

In the underfloor heat insulation structure according to the seventh aspect of the present invention, since the first beam side heat insulation material is fitted between the first underfloor heat insulation material and the first main body portion of the underfloor heat insulation material, the first beam side heat insulation material Compared to the case where the material is arranged between the first underfloor heat insulating material and the first body portion, it is possible to support the under beam heat insulating material more stably. In addition, since the second beam-side heat insulating material is fitted between the first underfloor heat insulating material and the second body portion of the under-beam heat insulating material, the second beam-side heat insulating material is simply placed between the first underfloor heat insulating material and the second underfloor heat insulating material. It is possible to support the under-beam heat insulating material more stably than when it is arranged between the main bodies.

An underfloor heat insulation structure according to an eighth aspect of the present invention is the underfloor heat insulation structure according to the seventh aspect of the present invention. 2 subfloor insulation is provided.

In the underfloor heat insulating structure according to the eighth aspect of the present invention, the second underfloor heat insulating material is provided between the first underfloor heat insulating material, the first beam side heat insulating material, and the second beam side heat insulating material. The heat insulation effect between can be further improved.

An underfloor heat insulation method according to a ninth aspect of the present invention includes: a fixed piece fixed to a steel floor beam that is disposed under the floor and supports a floor plate and a first underfloor heat insulating material; A heat insulating material support comprising a mounting piece for mounting the beam heat insulating material covering the floor beam from both sides in the width direction perpendicular to the longitudinal direction of the beam, and supporting the mounting piece. A plate-shaped under-beam heat insulating material having a cutout portion formed so that a support piece can enter along the width direction of the floor beam, and a first beam side heat insulating material that abuts on the first side surface of the floor beam. and a second beam side heat insulating material that abuts on the second side surface of the floor beam. a fixing step of fixing the fixing piece to the beam; and bringing the mounting piece into contact with a contact portion of the under-beam heat insulating material located behind the notch along the approach direction of the support piece; an under-beam heat insulating material placing step of placing the under-beam heat insulating material on the mounting piece via the contact portion; a first beam side heat insulating material placing step of placing the first beam side heat insulating material on the first body portion of the under beam heat insulating material constituting the side on which the contact portion is provided; The second beam-side heat insulating material is placed on the second body portion of the under-beam heat insulating material constituting the side on which the notch portion is provided along the width direction of the floor beam with respect to the inner surface. and a step of placing a two-beam side heat insulating material.

In the underfloor heat insulation method according to the ninth aspect of the present invention, a heat insulating material support and a beam heat insulating material are used, and the heat insulating material support includes a fixing piece and a mounting piece. The fixed piece is arranged under the floor and is fixed to the steel floor beam supporting the floor plate and the first underfloor heat insulating material, and the mounting piece is for mounting the beam heat insulating material. ing.

On the other hand, the beam heat insulating material covers the floor beam from both sides in the width direction of the floor beam including the lower surface of the floor beam. It is configured including materials. The under-beam heat insulating material is formed with a cutout portion that allows a support piece that supports the mounting piece of the heat insulating material support to enter along the width direction of the floor beam. A contact portion is provided behind the notch portion along the direction, and the mounting piece of the heat insulating material support comes into contact with the contact portion.

Furthermore, in the under-beam heat insulating material, the side on which the contact portion is provided along the width direction of the floor beam is the first body portion, and the side on which the notch portion is provided is the second body portion, with the inner surface of the notch portion as a reference. It has two main bodies. Also, the first beam-side heat insulating material is in contact with the first side surface of the floor beam, and the second beam-side heat insulating material is in contact with the second side surface of the floor beam.

Here, this aspect includes a fixing step, an under-beam heat insulating material placement step, a first beam side heat insulating material placing step, and a second beam side heat insulating material placing step. In the fixing step, the fixing piece of the heat insulating material support is fixed to the floor beam. In addition, in the step of placing the under-beam heat insulating material, the mounting piece of the heat insulating material support is brought into contact with the contact portion of the under-beam heat insulating material, and the under-beam heat insulating material is placed on the mounting piece via the contact portion. place Furthermore, in the first beam side heat insulating material placing step, the first beam side heat insulating material is placed on the first body portion of the under beam heat insulating material, and in the second beam side heat insulating material placing step, the under beam heat insulating material The second beam side heat insulating material is placed on the second body portion of the.

In this way, since the beam heat insulating material is composed of a plurality of heat insulating materials, it is possible to arrange the beam heat insulating material in a state of being in close contact with the floor beam compared to the case where the beam heat insulating material is composed of a single heat insulating material. can. Further, in this aspect, the first beam-side heat insulating material and the second beam-side heat insulating material are placed on the under-beam heat insulating material placed on the heat insulating material support. That is, the first beam-side heat insulating material and the second beam-side heat insulating material are placed on the heat insulating material support via the under-beam heat insulating material. For this reason, in this aspect, the support state of the beam heat insulating material is more stable than in the case where the beam heat insulating material is suspended from above and supported by the heat insulating material support.

An underfloor heat insulation method according to a tenth aspect of the present invention is the underfloor heat insulation method according to the ninth aspect of the present invention, further comprising an underfloor heat insulation disposing step of disposing a second underfloor heat insulation on the lower side of the floor plate, In the first beam side heat insulating material placing step, the first beam side heat insulating material is fitted between the first main body portion and the second underfloor heat insulating material, and in the second beam side heat insulating material placing step, the second beam side heat insulating material The second beam-side heat insulating material is fitted between the two main body portions and the second underfloor heat insulating material.

In the underfloor heat insulation method according to the tenth aspect of the present invention, in the underfloor heat insulation placement step, the second underfloor heat insulation is arranged on the lower side of the floor plate. In this case, in the step of placing the first beam side heat insulating material, the first beam side heat insulating material is fitted between the second underfloor heat insulating material and the first body portion of the under beam heat insulating material, and the second beam side heat insulating material is placed. In the placing step, the second beam side heat insulating material is fitted between the second underfloor heat insulating material and the second main body portion of the under beam heat insulating material. That is, in this aspect, since the second underfloor heat insulating material is provided between the floor plate and the first beam side heat insulating material and the second beam side heat insulating material, the heat insulating effect between the floor and the underfloor can be further improved.

As described above, the underfloor heat insulation structure and the underfloor heat insulation method according to this aspect have the excellent effect of ensuring underfloor heat insulation.

1 is a cross-sectional view showing an underfloor configuration to which an underfloor heat insulating structure according to a first embodiment is applied; FIG. FIG. 2 is a perspective view showing the configuration of a heat insulating material support fitting used in the underfloor heat insulating structure according to the first embodiment; FIG. 4 is an exploded perspective view showing a state before a heat insulating material support is fixed to a side wall portion of a small floor beam in the underfloor heat insulation method according to the first embodiment; FIG. 4 is an exploded perspective view showing a state before an underfloor heat insulating material is fitted between a lower wall portion of a small floor beam and a mounting piece of a heat insulating material support in the underfloor heat insulating method according to the first embodiment; FIG. 4 is an exploded perspective view showing a state before beam-side heat insulating materials are respectively fitted between both side wall portions of a small floor beam and between the underfloor heat insulating materials and the underfloor heat insulating materials in the underfloor heat insulating method according to the first embodiment. It is a sectional view showing modification 1 of underfloor heat insulation structure concerning a 1st embodiment. It is a sectional view showing modification 2 of underfloor heat insulation structure concerning a 1st embodiment. FIG. 11 is a perspective view showing the configuration of a heat insulating material support fitting used in the underfloor heat insulating structure according to the second embodiment; FIG. 7 is a cross-sectional view showing an underfloor configuration to which an underfloor heat insulating structure according to a second embodiment is applied; FIG. 11 is an exploded perspective view showing a state before a heat insulating material support is fixed to a side wall portion of a small floor beam in the underfloor heat insulation method according to the second embodiment; FIG. 10 is an exploded perspective view showing a state before an underfloor heat insulating material is fitted between a lower wall portion of a small floor beam and a mounting piece of a heat insulating material support in the underfloor heat insulating method according to the second embodiment; FIG. 11 is an exploded perspective view showing a state before a notch heat insulating material is fitted into a notch portion of an underfloor heat insulating material in the underfloor heat insulating method according to the second embodiment. FIG. 9 is an exploded perspective view showing a state before beam side heat insulating materials are respectively fitted between both side wall portions of a small floor beam and between the underfloor heat insulating materials and the underfloor heat insulating materials in the underfloor heat insulating method according to the second embodiment. FIG. 10 is a cross-sectional view showing Modification 1 of the heat insulating material support bracket used in the underfloor heat insulating structure according to the second embodiment. (A) is a cross-sectional view showing Modification 2 of the heat insulating material support fitting used in the underfloor heat insulation structure according to the second embodiment, and (B) is a cross-sectional view showing the contact surfaces of the heat insulating material support fittings approaching each other. (C) is a front view showing a state in which the contact surfaces of the heat insulating material support fittings are separated from each other. (A) to (C) are cross-sectional views respectively showing an underfloor heat insulating structure according to a third embodiment.

An embodiment of the floor of a unit building to which the underfloor heat insulation structure according to the present embodiment is applied will be described below with reference to the drawings.

<First embodiment>
First, the underfloor heat insulation structure according to the first embodiment will be described.

(Configuration of underfloor heat insulation structure)
Although not shown, a building unit generally has a substantially box-like shape, and square tube-shaped pillars having the same length are erected at the four corners of the building unit. On the floor of the building unit, the columns that are adjacent along the girder direction (longitudinal direction) of the building unit are spanned by floor girders. are spanned by floor girders. In addition, in the building unit, a plurality of small floor girders are bridged at predetermined intervals between floor girders (not shown) facing each other in the gable direction.

FIG. 1 shows a cross-sectional view showing an underfloor heat insulation structure including one floor beam (floor beam) 14 among a plurality of floor beams provided in a floor portion 12 of a building unit 10 . The plurality of small floor beams 14 are set to have substantially the same upper surface height, and brackets (not shown) are fixed to upper portions 16 of the small floor beams 14 .

The bracket has a hat-shaped cross section with an opening on the lower side, and the upper wall portion of the bracket is in contact with the upper surface 14 A 1 of the small floor beam 14 . Both side wall portions of the bracket are in contact with both side surfaces 14B1 and 14C1 of the small floor beam 14, respectively. An underfloor heat insulating material 22 is placed respectively.

The underfloor heat insulating material 22 is formed in a plate shape from a foam heat insulating material made of synthetic resin foam such as urethane foam, and has a rectangular plate shape with a predetermined thickness. A floor plate 24 is provided on the underfloor heat insulating material 22 . For example, a particle board is used as the floorboard 24 , and a floor finishing material such as flooring (not shown) is laid on the floorboard 24 .

On the other hand, a heat insulating material support fitting (heat insulating material support) 28, which will be described later, is fixed to the lower part 21 of the small floor beam 14, and a beam heat insulating material 30 (described later) is supported by the heat insulating material support fitting 28. ing. It should be noted that the beam heat insulating material 30 is formed in a plate shape by a foamed heat insulating material made of synthetic resin foam such as urethane foam, for example, like the underfloor heat insulating material 22, and the beam heat insulating material 30 is It is arranged in contact with the underfloor heat insulating material 22 .

(Configuration of heat insulating material support)
Here, the configuration of the heat insulating material support according to this embodiment will be described.

FIG. 2 shows a perspective view of the heat insulating material support fitting 28 according to the present embodiment as viewed diagonally from the front left side. The heat insulating material support fitting 28 shown in FIG. 2 is formed by pressing a rectangular metal plate. As the metal plate, for example, it is possible to use various metal materials such as carbon steel, alloy steel such as stainless steel, and non-ferrous metal such as copper-nickel alloy, the surface of which is coated with an antirust coating. In this embodiment, the heat insulating material support bracket 28 is made of metal, but is not necessarily limited to metal as long as it can support the beam heat insulating material 30 . For example, it may be made of fiber-reinforced resin or the like.

In this embodiment, the heat insulating material support fitting 28 is composed of a fixed piece 32 and a mounting piece 34, and the fixed piece 32 and the mounting piece 34 are bent so as to be substantially perpendicular to each other. The mounting piece 34 is set so as to include a position overlapping with the center of gravity G (see FIG. 1) of the beam heat insulating material 30 in plan view.

Here, FIGS. 3 to 5 show exploded perspective views of the working steps showing the underfloor heat insulation method according to the present embodiment, as viewed obliquely from the front left side. As will be described later, FIG. 3 shows the fixing process, FIG. 4 shows the under-beam heat insulating material placing process, and FIG. 5 shows the beam side heat insulating material placing process.

As shown in FIGS. 1 and 3, square steel pipes are used for the floor girders 14, and the cross-sectional shape has a rectangular shape whose longitudinal direction is the vertical direction. The floor beam 14 is composed of an upper wall portion 14A, a lower wall portion 14D, and side wall portions 14B and 14C. The fixed piece 32 of the heat insulating material support fitting 28 is fixed to the side wall portion 14C via a screw 36 while being in contact with the lower side of the side surface 14C1 of the floor beam 14. As shown in FIG. The fixing position of the heat insulating material support fitting 28 along the longitudinal direction (arrow L direction) of the floor beam 14 is determined in consideration of the load of the beam heat insulating material 30 and the rigidity of the heat insulating material support fitting 28, which will be described later. set.

In this way, with the fixing piece 32 of the heat insulating material support fitting 28 fixed to the side wall portion 14C of the floor beam 14, as shown in FIG. A gap H is provided between the mounting surface 34A of the mounting piece 34 of the heat insulating material support fitting 28 and the mounting surface 34A. An under-beam heat insulating material 38 forming part of the beam heat insulating material 30 is fitted into the gap H. As shown in FIG. The gap H does not need to be determined in advance, and may be positioned according to the plate thickness of the beam heat insulating material 30 to be attached before the screws 36 are fixed.

Here, the beam heat insulating material 30 includes the under beam heat insulating material 38, the beam side heat insulating material (first beam side heat insulating material) 40 that abuts on the side surface (first side surface) 14B1 of the small floor beam 14, and the floor small heat insulating material. and a beam side heat insulating material (second beam side heat insulating material) 42 that abuts on the side surface (second side surface) 14C1 of the beam 14 .

The width dimension W of the beam heat insulating material 30 is determined by the width dimension W1 of the floor small beam 14, the thickness t1 of the beam side heat insulating material 40 covering the side wall portion 14B of the floor small beam 14, and the side wall portion of the floor small beam 14. The thickness of the beam side heat insulating material 42 covering 14C is t2. Also, the length of the beam heat insulating material 30 is preferably as long as possible because there are few joints, but it is set arbitrarily in consideration of the method of carrying it into the underfloor 20 and the like.

As shown in FIG. 4 , the under-beam heat insulating material 38 has a rectangular plate shape in plan view, and a notch 44 is formed along the width direction of the small floor beam 14 . The notch 44 has a substantially rectangular plate shape in plan view, and is formed at predetermined intervals along the longitudinal direction of the under-beam heat insulating material 38 .

In addition, the fixing piece 32 of the heat insulating material support fitting 28 can enter the notch portion 44 , and when the fixing piece 32 is in contact with the inner surface 44 A of the notch portion 44 , the under beam heat insulating material 38 movement will be restricted. As shown in FIG. 1, the under-beam heat insulating material 38 is provided with a contact portion 46 behind the notch portion 44 along the direction in which the fixing piece 32 enters. The mounting piece 34 of the heat insulating material support fitting 28 abuts thereon.

In addition, in the under-beam heat insulating material 38, the side on which the contact portion 46 is provided along the width direction of the small floor beam 14 with respect to the inner surface 44A of the notch portion 44 is a main body portion (first main body portion) 48. , and the side on which the notch portion 44 is provided is a main body portion (second main body portion) 50 .

As shown in FIGS. 1 and 5, the beam-side heat insulating material 40 has a substantially rectangular plate shape when viewed from the side, and the lower surface 40A of the beam-side heat insulating material 40 is the main body portion of the under-beam heat insulating material 38. It can be brought into contact with the upper surface (on the first main body portion) 48A on the 48 side. In other words, the beam-side heat insulating material 40 is placed on the body portion 48 side of the under-beam heat insulating material 38 .

The height of the beam-side heat insulating material 40 is set to be the same as or slightly higher than the height from the lower surface 22A of the underfloor heat insulating material 22 to the upper surface 48A of the main body portion 48 of the under-beam heat insulating material 38 . Therefore, when the beam-side heat insulating material 40 is placed on the main body portion 48 side of the under-beam heat insulating material 38 , the beam-side heat insulating material 40 is placed between the lower surface 22A of the underfloor heat insulating material 22 and the main body portion 48 of the under-beam heat insulating material 38 . is fitted between the upper surface 48A of the floor sill 14 and is brought into contact with the side surface 14B1 of the small floor beam 14. As shown in FIG.

On the other hand, the beam-side heat insulating material 42 has a substantially rectangular plate shape when viewed from the side. , a rectangular parallelepiped projecting portion 52 that is fitted into the notch portion 44 protrudes. In a state in which the projecting portion 52 is fitted in the notch portion 44 of the under beam heat insulating material 38, the lower surface 42A of the beam side heat insulating material 42 is the upper surface of the under beam heat insulating material 38 on the main body portion 50 side (the second main body). above) 50A. That is, the beam side heat insulating material 42 is placed on the main body portion 50 side of the under beam heat insulating material 38 in a state in which the projecting portion 52 of the beam side heat insulating material 42 is fitted in the notch portion 44 of the under beam heat insulating material 38 . The Rukoto.

The height of the beam side heat insulating material 42 is the same as or slightly higher than the height from the lower surface 22A of the underfloor heat insulating material 22 to the upper surface 50A of the main body portion 50 of the underfloor heat insulating material 38, similarly to the beam side heat insulating material 40. is set to Therefore, when the beam-side heat insulating material 42 is placed on the body portion 50 side of the under-beam heat insulating material 38 , the beam-side heat insulating material 42 is placed between the lower surface 22A of the underfloor heat insulating material 22 and the main body portion 50 of the under-beam heat insulating material 38 . , and is brought into contact with the side surface 14C1 of the small floor beam 14. As shown in FIG.

(Action and effect of underfloor heat insulation structure)
Next, the action and effect of the underfloor heat insulation structure according to the present embodiment will be described.

First, as shown in FIGS. 1, 3, and 4, the fixed piece 32 of the heat insulating material support fitting 28 is fixed at a predetermined position in the height direction on the side wall portion 14C of the floor beam 14 (fixing step). . Thereby, a gap H is provided between the mounting surface 34A of the mounting piece 34 of the heat insulating material support fitting 28 and the lower surface 14D1 of the small floor beam 14. As shown in FIG.

Next, the under beam heat insulating material 38 is fitted into the gap H. As shown in FIG. That is, the fixing piece 32 of the heat insulating material support fitting 28 is inserted into the notch portion 44 of the under beam heat insulating material 38, and the abutting portion 46 positioned behind the notch portion 44 along the direction of entry of the fixing piece 32 is moved. The mounting piece 34 of the heat insulating material support fitting 28 is brought into contact with the . As a result, as shown in FIGS. 1 and 5, the under-beam heat insulating material 38 is placed on the mounting piece 34 of the heat insulating material support fitting 28 via the abutting portion 46 (under-beam heat insulating material mounting placement process).

Next, the beam side heat insulating material 40 is fitted between the lower surface 22A of the underfloor heat insulating material 22 and the upper surface 48A of the main body portion 48 of the underfloor heat insulating material 38, is brought into contact with the side surface 14B1 of the small floor beam 14, and the beam is The beam side heat insulating material 40 is placed on the main body portion 48 of the lower heat insulating material 38 (first beam side heat insulating material placing step).

Then, the beam side heat insulating material 42 is fitted between the lower surface 22A of the underfloor heat insulating material 22 and the upper surface 50A of the main body portion 50 of the underfloor heat insulating material 38, and is brought into contact with the side surface 14C1 of the small floor beam 14. The beam side heat insulating material 42 is placed on the main body portion 50 of the material 38 (second beam side heat insulating material placing step).

In this embodiment, the small floor beam 14 including the lower surface 14D1 of the small floor beam 14 is installed from both sides in the width direction of the small floor beam 14 by the work process described above. 38, beam side heat insulating material 40 and beam side heat insulating material 42).

As a result, in this embodiment, the floor beam 14 can be prevented from being exposed to the outside air, and heat bridge measures can be taken. Therefore, in the present embodiment, it is possible to ensure heat insulation in the underfloor 20 . In addition, in this embodiment, since the heat insulating material support bracket 28 is fixed to the lower part 21 side of the floor beam 14 via the fixing piece 32, it can be applied even in the case of renovation or the like. .

Furthermore, in the present embodiment, the beam heat insulating material 30 is supported from below while being mounted by the mounting pieces 34 of the heat insulating material support fittings 28 . That is, the beam-side heat insulating material 40 and the beam-side heat insulating material 42 are placed on the under-beam heat insulating material 38 placed on the heat insulating material support bracket 28 . For this reason, for example, although not shown, the support state of the beam heat insulating material 30 is lower than the case where the beam heat insulating material 30 is supported in a state of being suspended from above with respect to the heat insulating material support bracket 28. stabilizes.

In addition, in the present embodiment, the mounting surface 34A of the mounting piece 34 on which the under-beam heat insulating material 38 that constitutes a part of the beam heat insulating material 30 is mounted on the heat insulating material support fitting 28 is formed by a floor joist. 14, and the under-beam heat insulating material 38 is fitted between the lower surface 14D1 of the small floor beam 14 and the mounting surface 34A of the mounting piece 34. As shown in FIG.

In this way, by fitting the under-beam heat insulating material 38 between the lower surface 14D1 of the small floor beam 14 and the mounting surface 34A of the mounting piece 34, the lower surface 14D1 of the small floor beam 14 and the mounting piece 34 are mounted. It is possible to support the under-beam heat insulating material 38 more stably than when the under-beam heat insulating material 38 is simply arranged between the mounting surfaces 34A.

Further, as described above, in this embodiment, as shown in FIG. 4, the under-beam heat insulating material 38 has a plate-like shape, and the under-beam heat insulating material 38 has a plate-like shape. along the width direction of the body portion 48 constituting the side provided with the contact portion 46 (see FIG. 1), and the body portion 50 constituting the side provided with the notch portion 44, It is

On the other hand, as shown in FIGS. 1 and 5, the beam heat insulating material 30 further includes a beam side heat insulating material 40 and a beam side heat insulating material 42. The beam side heat insulating material 40 serves as an underfloor heat insulating material. It is fitted between the lower surface 22A of the material 22 and the upper surface 48A of the body portion 48 of the under-beam heat insulating material 38 so as to abut on the side surface 40B1 of the small floor beam 14. As shown in FIG. In addition, the beam side heat insulating material 42 has a projecting portion 52 fitted in the cutout portion 44 of the under-beam heat insulating material 38, and the lower surface 22A of the underfloor heat insulating material 22 and the upper surface 50A of the main body portion 50 of the under-beam heat insulating material 38. It is fitted between and abuts on the side surface 14C1 of the small floor beam 14. As shown in FIG.

That is, the under-beam heat insulating material 38 is pressed against the lower surface 14D1 of the floor beam 14, and the beam-side heat insulating material 40 is pressed against at least the under-floor heat insulating material 22 and the under-beam heat insulating material 38. It abuts on the side surface 14B1 of the beam 14, and the beam side heat insulating material 42 abuts on the side surface 14C1 of the small floor beam 14 while being pressed against at least the underfloor heat insulating material 22 and the underfloor heat insulating material 38.

In this way, each heat insulating material (under-beam heat insulating material 38, beam-side heat insulating material 40, beam-side heat insulating material 42) is fitted to each member with which they abut, and each part of the floor beam 14 is installed. (lower surface 14D1, side surface 14B1, side surface 14C1). For this reason, although not shown, in the present embodiment, each heat insulating material (beam under heat insulating material 38, beam side heat insulating material 40, beam side heat insulating material 42 ) and the small floor beam 14. Furthermore, each heat insulating material (under beam heat insulating material 38, beam side heat insulating material 40, beam side heat insulating material 42) also follows the dimensional tolerance of each part (lower surface 14D1, side surface 14B1, side surface 14C1) of the small floor beam 14. , the adhesion to each surface of the floor beam 14 can be improved.

In addition, by arranging the beam side heat insulating materials 40 and 42 on both sides of the floor small beam 14 with respect to the underfloor heat insulating material 22 in the width direction of the floor small beam 14, the beam heat insulating material 30 is well-balanced, It can be stably supported.

By the way, in this embodiment, the under-beam heat insulating material 38 is configured to include the notch portion 44 and the contact portion 46 . The notch portion 44 is cut so that the fixed piece 32 that supports the mounting piece 34 can enter along the width direction of the small floor beam 14, and the contact portion 46 is formed in the direction in which the fixed piece 32 enters. It is located behind the notch 44 along the , and the mounting piece 34 contacts it.

That is, in the present embodiment, the contact portion 46 of the under beam heat insulating material 38 is in contact with the mounting piece 34 of the heat insulating material support fitting 28, and the under beam heat insulating material 38 is placed through the mounting piece 34. It will be placed on the heat insulating material support bracket 28 . In this manner, the notch 44 is formed in the under-beam heat insulating material 38, and the mounting piece 34 is brought into contact with the contact portion 46 located behind the notch 44, so that the heat insulating material It is possible to position the under-beam heat insulating material 38 along the width direction and the longitudinal direction of the floor beam 14 via the support metal fittings 28 .

In addition, a notch portion 44 is formed in the under-beam heat insulating material 38, and the under-beam heat insulating material 38 is mounted on the heat insulating material support metal fitting 28 via an abutting portion 46 located at the back of the notch portion 44. By being supported by the piece 34, the position of the center of gravity G of the under-beam heat insulating material 38 can be set so as to overlap the mounting piece 34 in plan view. As a result, in the present embodiment, the beam heat insulating material 30 is prevented from generating a moment that tends to rotate downward about the tip of the mounting piece 34, and is placed on the mounting piece 34 in a stable state. state will be maintained. The position of the center of gravity G of the under-beam heat insulating material 38 is set so as to overlap with the mounting piece 34 in a plan view, and the under-beam heat insulating material 38 is easily supported, so that the under-beam heat insulating material 38 is arranged more stably. becomes possible.

In addition, in this embodiment, the heat insulating material support metal fittings 28 can be assembled (fixed) from the underfloor 20 side, and after the heat insulating material support metal fittings 28 are fixed to the small floor beams 14, the beam heat insulating material 30 (under the beam It becomes possible to assemble the heat insulating material 38, the beam side heat insulating material 40, and the beam side heat insulating material 42). For this reason, in the present embodiment, the small floor beam 14 can be thermally reinforced without affecting the floor plate 24 and the existing underfloor heat insulating material 22 .

Furthermore, in the present embodiment, the beam heat insulating material 30 (under beam heat insulating material 38, beam side heat insulating material 40, and beam side heat insulating material 42) is assembled by fitting each member including the heat insulating material support bracket 28. Since it is only attached (fixed), each heat insulating material can be attached and detached as necessary. The under-beam heat insulating material 38, the beam-side heat insulating material 40, and the beam-side heat insulating material 42 do not necessarily have to be fitted to each member including the heat insulating material support bracket 28, and are fixed with an adhesive or the like. You may do so.

Further, as a comparative example, although not shown, for example, when the heat insulating material support metal fitting 28 is fixed to the floor small beam 14 by adhesion, it is difficult to remove the heat insulating material support metal fitting 28 from the floor small beam 14. be. On the other hand, in the present embodiment, as shown in FIGS. 1 and 3, the heat insulating material support fittings 28 are fixed to the floor beams 14 with screws 36, so that the screws 36 can be removed. , the heat insulating material support fitting 28 can be easily removed.

For this reason, for example, at the time of maintenance renewal such as inspection space for underfloor inspection and underfloor piping required during the period of use of the house, by removing only the beam heat insulating material 30, or by removing the beam heat insulating material 30 and heat insulation By removing the material support bracket 28, the necessary work space can be easily secured. In particular, assuming renovation, the older the building, the lower the height of the floorboard space and the more space must be secured. Workability is good because it can be removed. In other words, in this embodiment, it is also possible to add a new heat insulating material to the existing floor structure.

In this embodiment, as shown in FIG. 1, the beam heat insulating material 30 is composed of a plurality of heat insulating materials (beam under heat insulating material 38, beam side heat insulating material 40, and beam side heat insulating material 42). As a result, although not shown in the drawings, compared to the case where the beam heat insulating material is made of a single heat insulating material, in this embodiment, the beam heat insulating material 30 is applied to each part (lower surface 14D1, side surface 14D1) of the small floor beam 14 14B1 and side surface 14C1), and the beam heat insulating material 30 can be placed on the mounting piece 34 in a stable state.

In addition, in the present embodiment, each pre-designed member (the heat insulating material support bracket 28, the under beam heat insulating material 38, the beam side heat insulating material 40, and the beam side heat insulating material 42) may be assembled according to a predetermined procedure. Since there is little time adjustment work, it is less likely to be affected by assembly accuracy and workability is good.

Furthermore, in this embodiment, as shown in FIGS. 1 and 2, in the heat insulating material support bracket 28, the fixing piece 32 fixed to the floor beam 14 also serves as a support piece for supporting the mounting piece 34. The fixed piece 32 and the mounting piece 34 are formed to be connected. In this manner, the heat insulating material support fitting 28 may be configured by the fixing piece 32 and the mounting piece 34 by using both the fixed piece 32 and the support piece in the heat insulating material support fitting 28 . In this case, the shape of the heat insulating material support fitting 28 is simplified, and the heat insulating material support fitting 28 can be formed at low cost.

(Modification of this embodiment)
In the above embodiment, as shown in FIGS. 1 and 3, between the lower surface 22A of the underfloor heat insulating material 22 and the upper surface 48A of the body portion 48 of the under beam heat insulating material 38 fixed to the heat insulating material support bracket 28, The beam side heat insulating material 40 is fitted, and the beam side heat insulating material 42 is fitted between the lower surface 22A of the underfloor heat insulating material 22 and the upper surface 50A of the main body portion 50 of the underfloor heat insulating material 38. It is not limited.

For example, as a modified example 1, as shown in FIG. 6, an underfloor heat insulating material (second underfloor heat insulating material) 54 may be separately provided below the underfloor heat insulating material 22 . In this way, by further providing the underfloor heat insulating material 54 below the underfloor heat insulating material 22, the heat insulating effect between the above floor 18 and the underfloor 20 can be further improved. In other words, in this embodiment, it is possible to improve the insulation performance by adding the new underfloor heat insulating material 54 to the existing floor structure in which the underfloor heat insulating material 22 is already provided.

In this case, instead of the underfloor heat insulating material 22, between the lower surface 54A of the underfloor heat insulating material 54 and the upper surface 48A of the body portion 48 of the under beam heat insulating material 38 in the first beam side heat insulating material placing process described above. The beam side heat insulating material 40 is fitted. In addition, in the second beam side heat insulating material placement step, instead of the underfloor heat insulating material 22, the beam side heat insulating material 42 is placed between the lower surface 54A of the underfloor heat insulating material 54 and the upper surface 50A of the main body portion 50 of the underfloor heat insulating material 38. will be inserted.

In the above embodiment, as shown in FIGS. 1 and 5, after fixing the heat insulating material support metal fittings 28 to the floor beam 14, the lower surface 14D1 of the lower wall portion 14D of the floor small beam 14 and the heat insulating material support metal fittings 14 are fixed. The under-beam heat insulating material 38 is fitted between the mounting surface 34A of the mounting piece 34 of 28, but it is not limited to this. That is, the lower surface 38A of the under beam heat insulating material 38 does not abut on the mounting surface 34A of the mounting piece 34 of the heat insulating material support fitting 28, and the under beam heat insulating material 38 is not supported from the under surface 38A side.

For example, as a modified example 2, as shown in FIG. 7, the board of the under-beam heat insulating material 38 is pushed by piercing the mounting piece 34 of the heat insulating material supporting metal fitting 28 with the intermediate portion of the under-beam heat insulating material 38 in the plate thickness direction. The under-beam heat insulating material 38 may be supported from below at an intermediate portion in the thickness direction.

In this case, the mounting piece 34 of the heat insulating material support fitting 28 is covered with the under beam heat insulating material 38 . That is, since the mounting piece 34 of the heat insulating material support fitting 28 is not exposed to the outside, there is no thermal bridge in this portion, and the heat insulating property in the underfloor 20 can be secured more effectively.

In addition, in this embodiment, since it is not necessary to fit the under-beam heat insulating material 38 between the lower wall portion 14D of the small floor beam 14 and the mounting piece 34 of the heat insulating material support bracket 28, the under-beam heat insulating material 38 is It can be used as long as it has a certain thickness or more. As a result, the heat insulating material support fitting 28 can be shared.

<Second embodiment>
The underfloor heat insulation structure according to the second embodiment will be described below. In addition, in the following description, the same code|symbol is used about the substantially same structure as 1st Embodiment, and description is omitted.

(Configuration of heat insulating material support)
The configuration of the heat insulating material support according to this embodiment will be described.

FIG. 8 shows a perspective view of the heat insulating material support fitting (heat insulating material support) 60 according to the present embodiment as viewed diagonally from the front left side. In this embodiment, the heat insulating material support fitting 60 includes a fixing portion (fixing piece) 62, a mounting portion (mounting piece) 64, and a supporting portion (supporting piece) 66. Between the portion 62 and the mounting portion 64, a support portion 66 having a substantially inverted L shape when viewed from the front is provided.

The support portion 66 is composed of a horizontal wall portion 66A connected to the fixed portion 62 and formed along a substantially horizontal direction, and a vertical wall portion (support piece) 66B connected to the mounting portion 64 and formed along the vertical direction. It is The mounting portion 64 is divided into the left and right sides of the heat insulating material support bracket 60 with respect to the vertical wall portion 66B. is provided with a mounting piece 64B. The mounting piece 64A is formed to have the same dimension as the vertical wall portion 66B along the front-rear direction, but the mounting piece 64B is formed to match the dimension of the notch portion 78 described later, and the horizontal wall portion 66A is formed to have the same dimension. located on the rear side of the

Here, FIGS. 10 to 13 show exploded perspective views of the working steps showing the underfloor heat insulation method according to the present embodiment, as viewed obliquely from the front left side. As will be described later, FIG. 10 shows the fixing process, FIGS. 11 and 12 show the under beam heat insulating material placing process, and FIG. 13 shows the beam side heat insulating material placing process. .

FIG. 9 shows a sectional view showing the underfloor heat insulation structure including the floor beam 14. As shown in FIGS. 14 is fixed to the lower side of the side wall portion 14C. As a result, a gap H1 is provided between the lower surface 14D1 of the lower wall portion 14D of the floor beam 14 and the mounting surface 64A1 of the mounting piece 64A of the heat insulating material supporting metal fitting 60. A gap H2 is provided between the lower surface 66A1 of the portion 66A and the mounting surface 64B1 of the mounting piece 64B of the heat insulating material support fitting 60 .

As shown in FIGS. 9 and 12, an under-beam heat insulating material 70 constituting part of the beam heat insulating material 68 is fitted in the gap H1. , a notch heat insulating material 72 constituting another part of the beam heat insulating material 68 is fitted.

In this embodiment, the beam heat insulating material 68 includes the under beam heat insulating material 70, the notch heat insulating material 72, and the beam side heat insulating material (first beam side heat insulating material) 74, and a beam side heat insulating material (second beam side heat insulating material) 76 that abuts on the side surface (second side surface) 14C1 of the small floor beam 14.

Here, as shown in FIG. 11, the under-beam heat insulating material 70 has a rectangular plate shape in a plan view, and a notch 78 is formed along the width direction of the small floor beam 14 . The cutouts 78 have a substantially rectangular plate shape in plan view, and are formed at predetermined intervals along the longitudinal direction of the under-beam heat insulating material 70 .

Further, the vertical wall portion 66B of the support portion 66 of the heat insulating material support fitting 60 can enter the notch portion 78, and the vertical wall portion 66B is in contact with the inner surface 78A of the notch portion 78. Therefore, the movement of the under-beam heat insulating material 70 is restricted. Further, as shown in FIG. 9, the under beam heat insulating material 70 is provided with a contact portion 80 behind the notch portion 78 along the approach direction of the vertical wall portion 66B. 64A of the mounting piece 64A of the heat insulating material support metal fitting 60 contacts.

Further, as shown in FIGS. 9 and 11, in the under beam heat insulating material 70, a contact portion 80 is provided along the width direction of the small floor beam 14 with the inner surface 78A of the notch portion 78 as a reference. A main body portion (first main body portion) 82 is provided on the side, and a main body portion (second main body portion) 84 is provided on the side where the notch portion 78 is provided.

On the other hand, the cutout heat insulating material 72 is formed in a rectangular parallelepiped shape and can be fitted into the cutout portion 78 . With the notch heat insulating material 72 fitted in the notch portion 78, the notch heat insulating material 72 is placed on the mounting piece 64B.

As shown in FIG. 13, the beam-side heat insulating material 74 has a substantially rectangular plate shape when viewed from the side, and the lower surface 74A of the beam-side heat insulating material 74 is located on the main body 82 side of the under-beam heat insulating material 70. It can be brought into contact with the upper surface (on the first main body portion) 82A. That is, the beam side heat insulating material 74 is placed on the main body portion 82 side of the under beam heat insulating material 70 .

9 and 13, the height of the beam side heat insulating material 74 is equal to or slightly higher than the height from the lower surface 22A of the underfloor heat insulating material 22 to the upper surface 82A of the main body portion 82 of the underfloor heat insulating material 70. set to be higher. Therefore, when the beam-side heat insulating material 74 is placed on the main body portion 82 side of the under-beam heat insulating material 70 , the beam-side heat insulating material 74 is placed between the lower surface 22A of the underfloor heat insulating material 22 and the main body portion 82 of the under-beam heat insulating material 70 . and the upper surface 82A of the floor beam 14 and the side surface 14B1 of the small floor beam 14. As shown in FIG.

On the other hand, the beam side heat insulating material 76 has substantially the same shape as the beam side heat insulating material 74, and the lower surface 76A of the beam side heat insulating material 76 is the upper surface (second It abuts on the main body portion 84A and the upper surface 72A of the notch heat insulating material 72. As shown in FIG. That is, the beam-side heat insulating material 76 is placed on the body portion 84 side of the under-beam heat insulating material 70 and on the notch heat insulating material 72 .

In addition, the height of the beam side heat insulating material 76 is the same as the beam side heat insulating material 74, from the lower surface 22A of the under floor heat insulating material 22 It is set to be the same as or slightly higher than the height to the upper surface 72A). For this reason, when the beam side heat insulating material 76 is placed on the main body portion 82 side of the underfloor heat insulating material 70 and on the notch heat insulating material 72, the beam side heat insulating material 76 is placed between the lower surface 22A of the underfloor heat insulating material 22 and the beam underside. It is fitted between the upper surface 84A of the body portion 84 of the heat insulating material 70 and the upper surface 72A of the notch heat insulating material 72, and is brought into contact with the side surface 14C1 of the small floor beam 14. As shown in FIG.

In this embodiment, since it is not necessary to form the projecting portion 52 (see FIG. 5) in the beam side heat insulating material 74, the shape can be simplified. In addition, in the present embodiment, the beam-side heat insulating material 74 and the beam-side heat insulating material 76 can have substantially the same shape, so productivity can be improved and costs can be reduced.

(Modification of this embodiment)
In the above embodiment, for example, the fixing portion 62 of the heat insulating material support fitting 60 is fixed to the side wall portion 14C of the floor beam 14, but the fixing portion of the floor beam 14 is not limited to this.

For example, as a modification 1, as shown in FIG. 14, a fixing piece 92 of a heat insulating material support fitting (heat insulating material support) 90 is formed so as to be fixed to the lower wall portion 14D of the floor beam 14. good too. In this case, the support piece 96 is formed between the fixing piece 92 and the mounting piece 94 provided on the lower side of the fixing piece 92 . With the support piece 96 as a reference, the fixed piece 92 and the mounting piece 94 extend in the opposite direction along the substantially horizontal direction.

In this embodiment, the beam shown in FIG. A lower heat insulating material 38 is arranged, and beam side heat insulating materials 40 and 42 are in contact with the side wall portions 14B and 14C of the floor beam 14, respectively.

Further, as a modification 2, a heat insulating material support fitting (heat insulating material support) 100 shown in FIG. 15(A) may be used. The heat insulating material support fitting 100 is provided with a contact piece 102 capable of contacting the lower wall portion 14</b>D of the small floor beam 14 . Sandwiching portions 104 and 106 for holding the side wall portions 14B and 14C of the small floor beam 14 are provided at both ends of the contact piece 102 in the width direction.

As shown in FIGS. 15A and 15B, the clamping portions 104 and 106 include contact pieces 108 and 110 contacting the side wall portions 14B and 14C, hinge portions 112 and 114, and gripping pieces. , and hinge portions 112 and 114 are provided in the longitudinal central portions of the contact pieces 108 and 110, respectively. The gripping pieces 116 and 118 are attached to the contacting pieces 108 and 110 via the hinges 112 and 114, respectively. , 110 along the arrow A direction.

In addition, the contact pieces 108 and 110 are slanted toward each other toward the tip, and the separation distance at the tip of the contact piece 108 and the contact piece 110 is larger than the width dimension of the small floor beam 14. set to be narrow.

By sandwiching the gripping pieces 116 and 118 so that the tip sides of the gripping pieces 116 and 118 approach each other in the direction of the arrow B, the gripping pieces 116 and 118 and the hinge are formed as shown in FIG. 15(C). The tips of the abutment pieces 108 and 110 are separated from each other via the portions 112 and 114 so that the floor beam 14 can be inserted between the abutment pieces 108 and 110 . In addition, the heat insulating material support metal fitting 100 can be stably attached to the small floor beam 14 by the biasing force of the spring by the contact piece 102 and the contact pieces 108 and 110 .

The small floor beam 14 is inserted between the contact pieces 108 and 110, and the contact piece 102 of the heat insulating material support bracket 100 is in contact with the lower wall portion 14D of the small floor beam 14. The side wall portion 14B and the side wall portion 14C are sandwiched by the contact pieces 108 and 110 . In this state, the grip pieces 116 and 118 are rotated via the hinge portions 112 and 114 so that the grip pieces 116 and 118 overlap the contact pieces 108 and 110 .

The heat insulating material support fitting 100 is provided with a mounting piece 120 facing the contact piece 102 , and a support piece 122 is formed between the contact piece 102 and the mounting piece 120 . 5 is arranged between the contact piece 102 and the mounting piece 120 in a state where the heat insulating material support fitting 100 is fixed to the floor beam 14, and the floor Beam side heat insulating materials 40 and 42 shown in FIG.

Note that, in this embodiment, as indicated by the two-dot chain line in FIG. The parts 116A and 118A are set so as to be rotatable with respect to the grip piece main bodies 128 and 130. As shown in FIG.

With the gripping pieces 116 and 118 superimposed on the abutment pieces 108 and 110, the tip portions 116A and 118A of the gripping pieces 116 and 118 are rotated substantially horizontally via the hinge portions 124 and 126, respectively. Let As a result, the tip portions 116A and 118A of the gripping pieces 116 and 118 may serve as supporting members, and the tip portions 116A and 118A of the gripping pieces 116 and 118 may support the underfloor heat insulating material 54 shown in FIG. can be

<Third Embodiment>
The underfloor heat insulation structure according to the third embodiment will be described below. In addition, in the following description, the same code|symbol is used about the substantially same structure as 1st Embodiment, and description is omitted.

In the above-described embodiment, for example, as shown in FIG. 1, an example is described in which the small floor beams 14 made of square steel pipes are used as the floor beams, but the shape of the floor beams in this embodiment is limited to this. is not.

For example, as shown in FIG. 16(A), a small floor beam 134 made of channel steel or a lip channel steel (not shown) may be used as the floor beam. For example, in FIG. 16A, the fixed piece 32 of the heat insulating material support fitting 28 is fixed to the outer surface 136A side of the web portion 136 that constitutes the side wall portion of the floor beam 134 . In addition, as shown in FIG. 16(B), the fixed piece 140 of the heat insulating material support fitting (heat insulating material support) 138 may be fixed to the inner surface 136B side of the web portion 136 of the floor beam 134. Of course.

Here, the heat insulating material support fitting 28 shown in FIG. 16(A) consists of a fixed piece 32 fixed to the outer surface 136A of the web portion 136 of the floor beam 134 and a mounting piece 34 on which the under beam heat insulating material 38 is arranged. consists of On the other hand, the heat insulating material support bracket 138 shown in FIG. and a support piece 148 that connects the horizontal wall portion 144 and the mounting piece 146 is provided. In this manner, the shape of the heat insulating material support bracket 138 can be appropriately changed according to the fixed position of the floor beam 134 .

In addition to the above, as shown in FIG. 16(C), it may be applied to floor girders 150 and 152 in which two channel steels are connected as floor girders. In this case, the fixing piece 140 of the heat insulating material support fitting 138 contacts the inner surface 154A of the web portion (side wall portion of the floor beam) 154 of the floor girder 152, and the web portion 154 and the floor girder are attached from the inner surface 154A side of the web portion 154. A screw 36 penetrates the web portion (side wall portion of the floor beam) 156 of 150 to fix the heat insulating material support fitting 138 to the floor beams 150 and 152 .

In the above embodiment, as shown in FIGS. 16A to 16C, heat insulating materials 158 are provided inside the small floor girders 134 and the large floor girders 150 and 152, respectively. That is, this embodiment can be applied regardless of the shape of the floor beam by appropriately changing the shape of the heat insulating material support bracket according to the shape of the floor beam.

In addition, in the present embodiment described above, a house constructed by the unit construction method has been described, but the building may of course be constructed by a construction method other than this (for example, a steel framework construction method).

The present invention is not limited to the above-described embodiments, and various modifications, changes, and improvements are possible without departing from the scope of the invention. For example, the embodiments and modifications described above may be configured by combining a plurality of them as appropriate.

12 Floor 14 Small floor beam (floor beam)
14B side wall (side wall of floor beam)
14B1 side (first side)
14C side wall (side wall of floor beam)
14C1 side (second side)
14D1 bottom surface (bottom surface of floor beam)
20 underfloor 22 underfloor heat insulating material (first underfloor heat insulating material)
24 floor plate 28 heat insulating material support fitting (heat insulating material support)
30 Insulating material for beams 32 Fixed piece (supporting piece, insulating material support)
34 Mounting piece (insulating material support)
38 Under-beam insulation (insulation for beams)
40 beam side insulation (insulation for beams)
42 Beam side insulation (insulation for beams)
44 notch 44A back surface (back surface of notch)
46 contact portion 48 body portion (first body portion)
48A upper surface (on the first main body)
50 main body (second main body)
50A upper surface (on the second main body)
54 underfloor insulation (second underfloor insulation)
60 Insulation material support fitting (insulation material support)
62 fixed part (fixed piece, heat insulating material support)
64 Placement part (placement piece, heat insulating material support)
64A Mounting piece (insulating material support)
64B Mounting piece (insulating material support)
66 support part (support piece, heat insulating material support)
66B Vertical wall part (support piece, heat insulating material support)
68 Insulation material for beams 70 Insulation material under beams (Insulation material for beams)
72 Notch insulation (beam insulation, beam insulation)
74 Beam side insulation (insulation for beams)
76 Beam side insulation (insulation for beams)
78 Notch 78A Back surface (back surface of notch)
80 contact portion 82 body portion (first body portion)
82A upper surface (on the first main body)
84 main body (second main body)
84A upper surface (on the second main body)
90 Insulation material support fitting (insulation material support)
92 fixed piece (insulation support)
94 Mounting piece (insulating material support)
96 support piece (insulation material support)
100 Insulation material support fitting (insulation material support)
102 contact piece (fixed piece, heat insulating material support)
108 contact piece (fixed piece, heat insulating material support)
110 contact piece (fixed piece, heat insulating material support)
120 Mounting piece (insulating material support)
122 support piece (insulation material support)
134 floor beam (floor beam)
136 web part (side wall part of floor beam)
138 Insulation support bracket (Insulation support)
140 fixed piece (insulation support)
146 mounting piece (insulating material support)
148 support piece (insulation material support)
150 floor girders (floor girders)
152 Floor beams (floor beams)
154 web part (side wall part of floor beam)
156 web part (side wall part of floor beam)
G Center of gravity (center of gravity of under-beam insulation)

Claims (7)

a steel floor beam disposed under the floor and supporting the floor plate and the first underfloor heat insulating material;
A heat insulating material fixed to the floor beam and supporting the beam heat insulating material covering the floor beam from both sides in the width direction perpendicular to the longitudinal direction of the floor beam including the lower surface of the floor beam. a support;
with
The support for the heat insulating material is provided with a mounting piece arranged to face the lower surface of the floor beam and on which the heat insulating material for the beam is placed, and the heat insulating material for the beam is the floor beam and the above-described floor beam. It is configured including an under beam heat insulating material fitted between the placing pieces,
The under beam heat insulating material is
a cutout portion in which a support piece for supporting the mounting piece is cut so as to be able to enter along the width direction of the floor beam;
an abutting portion located behind the notch portion along the direction of entry of the support piece and with which the mounting piece abuts;
An underfloor thermal insulation structure comprising: The under beam heat insulating material is
a first body portion having a plate shape and forming a side on which the contact portion is provided along the width direction of the floor beam with reference to the inner surface of the notch portion;
a second main body portion constituting the side on which the notch portion is provided;
consists of
The beam heat insulating material is
a first beam side heat insulating material disposed between the first underfloor heat insulating material and the first main body portion and in contact with the first side surface of the floor beam;
a second beam side heat insulating material disposed between the first underfloor heat insulating material and the second main body portion and in contact with the second side surface of the floor beam;
The underfloor heat insulation structure according to claim 1 , further comprising: 3. The underfloor heat insulating structure according to claim 2, wherein the underfloor heat insulating material is composed of the under beam heat insulating material, the first beam side heat insulating material, and the second beam side heat insulating material, which are formed as separate members . The first beam side heat insulating material is fitted between the first underfloor heat insulating material and the first main body portion, and the second beam side heat insulating material is fitted between the first underfloor heat insulating material and the second main body portion. The underfloor heat insulation structure according to claim 3, wherein the underfloor heat insulation structure is fitted in the 5. The underfloor heat insulating structure according to claim 4, wherein a second underfloor heat insulating material is provided between the first underfloor heat insulating material, the first beam side heat insulating material, and the second beam side heat insulating material . A fixed piece fixed to a steel floor beam that is arranged under the floor and supports the floor plate and the first underfloor heat insulating material, and both sides in the width direction including the lower surface of the floor beam and orthogonal to the longitudinal direction of the floor beam a mounting piece for mounting the beam heat insulating material covering the floor beam from the heat insulating material support;
a plate-like under-beam heat insulating material having a cutout portion formed so that a support piece for supporting the mounting piece can enter along the width direction of the floor beam; the beam heat insulating material including a first beam side heat insulating material in contact with the floor beam and a second beam side heat insulating material in contact with the second side surface of the floor beam;
Applied when supporting underfloor insulation using
a fixing step of fixing the fixing piece to the floor beam;
In the under-beam heat insulating material, the mounting piece is brought into contact with the contact portion located at the back of the notch portion along the approach direction of the support piece, and the mounting piece is placed on the mounting piece via the contact portion. An under-beam heat insulating material placing step of placing the under-beam heat insulating material;
The first beam-side heat insulating material is placed on the first body portion of the under-beam heat insulating material constituting the side on which the contact portion is provided along the width direction of the floor beam with respect to the inner surface of the notch portion. A first beam side heat insulating material placing step for placing the
The second beam-side heat insulating material is placed on the second body portion of the under-beam heat insulating material forming the side on which the notch is provided along the width direction of the floor beam with respect to the inner surface of the notch. A second beam side heat insulating material placing step for placing the
underfloor insulation methods including; An underfloor heat insulating material arranging step is provided for arranging a second underfloor heat insulating material on the lower side of the floor plate, and in the first beam side heat insulating material placing step, between the first main body portion and the second underfloor heat insulating material In the step of fitting the first beam side heat insulating material and placing the second beam side heat insulating material, the second beam side heat insulating material is fitted between the second main body portion and the second underfloor heat insulating material. Item 6. The underfloor heat insulation method according to Item 6.

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