JP7323171B2 - Fixing structure of floor insulating material and fixing method of floor insulating material - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fixing structure of a floor insulating material and a fixing method of a floor insulating material.

In a structure in which the floorboards of a building are supported by metal floor beams, the horizontal members act as heat bridges, and the building may be susceptible to the effects of outside air. Therefore, it is desirable to cover the outer surface of the floor beam with a heat insulating material to suppress the phenomenon that the floor beam becomes a heat bridge.

In the following patent document 1, the lower part of the floor beam is embedded in a block-shaped heat insulating material, and one end of the plate-shaped heat insulating material covering the side surface of the floor beam is placed on the upper surface of the block-shaped heat insulating material. An insulation fixing structure is disclosed. In this fixed structure, a block-shaped heat insulating material is restrained by a string-shaped adhesive tape, and both ends of the adhesive tape are attached to the side surfaces of the floor beams. Thereby, the block-shaped heat insulating material is fixed to the floor beam, and the plate-shaped heat insulating material can be supported from the lower side of the building.

Further, Patent Literature 1 listed below discloses a fixing structure for a floor heat insulating material that supports a plate-shaped heat insulating material that covers the side surface of the floor beam using the flange portion of the floor beam. Specifically, a flange portion extending substantially horizontally is provided at the lower end of the floor beam, and one end of the heat insulating material laid between the floor beams is placed on the flange portion.

JP 2018-204405 A

However, in the prior art described above, when the heat insulating material is fixed using the adhesive tape, dust and oil may adhere to the adhesive surface depending on the work environment under the floor. For this reason, the durability of the adhesive tape may change under the influence of the working environment, resulting in variations in quality.

In addition, in the above-mentioned prior art, when the flange portion provided at the lower end of the floor beam is used to support the heat insulating material, it cannot be applied to the floor beam having an open cross section without a flange portion, so the versatility is low. .

SUMMARY OF THE INVENTION In consideration of the above facts, it is an object of the present invention to provide a floor insulating material fixing structure and a floor insulating material fixing method which are highly versatile and which achieve uniform quality at the time of construction.

A fixing structure for a floor insulating material according to a first aspect includes a web portion arranged at a predetermined interval under the floor and extending at least in the height direction of the building, and a web portion extending substantially horizontally from the upper end of the web portion. a plurality of floor beams formed in an open cross-sectional shape including an upper flange portion that supports the floor plate from the lower side of the building; a first fixing portion sandwiched between the floor plate and the upper flange portion; a first support portion extending from a fixed portion in a direction away from the web portion; a first receiving member that supports from below; a second fixing portion that is fixed to the first receiving member; and a second supporting portion that extends from the second fixing portion in a direction away from the web portion. a second receiving member that supports a second heat insulating material laid between the floor beams on the lower side of the building of the first heat insulating material from the lower side of the building with the second support portion; A third heat insulator disposed inside the open cross-section of the floor beam, including a fixed third fixing portion and a third support portion extending from the third fixing portion in a direction approaching the web portion. and a third receiving member that supports the material from the lower side of the building with the third supporting portion.

In the fixing structure of the floor insulating material according to the first aspect, the floor plate is supported from the lower side of the building by using a plurality of floor beams having an open cross section, and the first insulating material is provided between the floor beams. are laid. Moreover, the 2nd heat insulating material is arrange|positioned at the building downward side of the 1st heat insulating material. In this way, by laying the first heat insulating material and the second heat insulating material side by side on the lower side of the floor plate, the heat insulating material is arranged so as to cover the outer surface of the floor beam from the side. A third heat insulating material is arranged inside the open cross section of the floor beam. As a result, it is possible to cover the side surfaces of the floor beams with the heat insulating material without gaps, and the heat insulation performance of the floor beams is enhanced.

Here, the heat insulating material arranged on the lower side of the floor board is supported by the floor beam via the first receiving member, the second receiving member, and the third receiving member. Specifically, the first receiving member is sandwiched between the upper flange portion of the floor beam and the floor plate. The first support member supports the first heat insulating material from the lower side of the building with a first support portion extending in a direction away from the web portion of the floor beam. A second receiving member is fixed to the first receiving member. This second receiving member supports the second heat insulating material from the lower side of the building with a second support portion extending in a direction away from the web portion of the floor beam. Furthermore, a third receiving member is fixed to the second receiving member. The third support member supports the third heat insulating material arranged inside the open cross section of the floor beam from the lower side of the building with the third supporting portion extending in the direction close to the web portion of the floor beam.

In this way, the first receiving member is fixed so as to be sandwiched between the floor beam and the floor plate, and each heat insulating material is supported via the second receiving member and the third receiving member which are connected to each other. As a result, compared to a fixed structure in which adhesive tape is used to directly fix the floor beam to the side of the floor beam, the structure is less affected by the work environment in terms of the strength of fixing between the floor beam and the heat insulating material and the structural durability. It is said that As a result, quality uniformity can be achieved.

In addition, since the first receiving member can be installed using the floor plate and the upper flange portion that supports the floor plate, the fixing structure of the floor beam can be applied to floor beams of various shapes, Excellent versatility.

A fixing structure for a floor heat insulating material according to a second aspect is the configuration according to the first aspect, wherein the second fixing portion and the third fixing portion are provided in the second receiving member and the third receiving member. and a second wall portion extending in a direction different from that of the first wall portion. is fixed to the first receiving member via the second fixing portion, and the second wall portion extends in a direction away from the web portion to form the second support portion. In the third receiving member, the first wall portion is fixed to the one common receiving member via the third fixing portion, and one end of the first wall portion extends in a direction approaching the web portion. It is the other common receiving member that is present and constitutes the third support portion.

In the fixing structure of the floor heat insulating material according to the second aspect, the second receiving member and the third receiving member are configured by common receiving members having the same shape. The common receiving member includes a first wall portion and a second wall portion extending in a direction different from that of the first wall portion, and a second fixing portion fixed to the first receiving member on the side of the first wall portion. A third fixing portion is provided for fixing the third receiving member to the second receiving member. In one of the common receiving members fixed to the first receiving member via the second fixing portion, the second wall portion extends in a direction away from the web portion to form a second support portion. As a result, one of the common receiving members becomes the second receiving member and can support the second heat insulating material. On the other hand, when the other common support member is fixed to the one common support member via the third fixing portion, one end of the first wall portion extends in a direction approaching the web portion to form the third support portion. Configure. As a result, the other common receiving member becomes the third receiving member, and can support the third heat insulating material.

In this way, since the second receiving member and the third receiving member are commonly used by using the same common receiving member, the second receiving member and the third receiving member are configured with members having different shapes. By comparison, the number of types of members can be reduced. Thereby, the production cost of the member can be suppressed.

A fixing structure for a floor heat insulating material according to a third aspect is the configuration according to the second aspect, wherein the other common receiving member is configured such that the first wall portion of the other common receiving member is attached to the one common receiving member. The third fixing portion of the other common receiving member can be fixed to the one common receiving member by arranging the third fixing portion of the other common receiving member in a posture substantially orthogonal to the first wall portion of the.

In the fixing structure of the floor heat insulating material according to the third aspect, by arranging the first wall portions of the pair of common receiving members in a posture orthogonal to each other, the third fixing portion of the other common receiving member It can be fixed to a member. Therefore, since the pair of common support members can be fixed together by a simple method of changing the attitude of the common support member, construction is facilitated.

A fixing structure for a floor heat insulating material according to a fourth aspect is the structure according to the first aspect, wherein the third receiving member is composed of a single plate material, and the one end is folded back to the one end side of the plate material. The third fixing portion formed in a clip shape is provided, and the third support portion is provided on the other end side of the plate member and extends in a direction approaching the web portion from the third fixing portion, The third fixing portion can be fixed to the second receiving member by sandwiching the second supporting portion between the fixing portions.

In the fixing structure of the floor heat insulating material according to the fourth aspect, the third receiving member is composed of a single plate material, one end of the plate material is the third fixing portion formed in a clip shape, and the second supporting portion can be clamped. On the other hand, the other end side of the plate member serves as a third support portion extending in a direction approaching the web portion. In this way, the third receiving member has a simple structure in which one end of a single plate member is folded back, and can be easily fixed by inserting the second supporting portion into the third fixing portion formed in the shape of a clip. can do.

A fixing structure for a floor heat insulating material according to a fifth aspect is the configuration according to any one of the first to fourth aspects, wherein a pair of the second receiving members are provided on both sides of the floor beam, A fourth heat insulating material covering the lower side of the building of the floor beam, and fixing means for fixing the fourth heat insulating material to the second receiving member are provided.

In the fixing structure of the floor insulating material according to the fifth aspect, the second support members are arranged on both sides of the floor beam, and the lower side of the building of the floor beam is attached to the second support member using fixing means. A fourth insulating covering is fixed. For this reason, for example, even if the dimension of the web portion of the floor beam is longer than the thickness of the heat insulating layer in which the first heat insulating material and the second heat insulating material are laminated, the fourth heat insulating material can be used for the floor beam. It is possible to cover the bottom. As a result, the heat insulating effect of the floor beam by the heat insulating material is enhanced.

Further, according to the above configuration, since the fourth heat insulating material can be fixed to the second receiving member, an additional receiving member for supporting the fourth heat insulating material becomes unnecessary, thereby suppressing an increase in the size of the fixing structure of the heat insulating material. can do. As a result, construction can be easily performed even in a building with a small underfloor space.

A method for fixing a floor insulating material according to a sixth aspect is the structure according to any one of the first to fifth aspects, and the method according to any one of the first to fourth aspects. A method for installing a heat insulating material applied to a fixed structure of a floor insulating material, wherein the first heat insulating material laid between the plurality of floor beams supporting the floor plate and the first heat insulating material supporting the first heat insulating material A first step of fixing the second receiving member to the first receiving member under the floor of an existing building provided with one receiving member; a second step of supporting the second heat insulating material on the second receiving member; A third step of disposing the third heat insulating material inside the open cross section of the floor beam, fixing the third receiving member to the second receiving member, and supporting the third heat insulating material on the third receiving member. and a fourth step.

In the fixing method of the floor heat insulating material according to the sixth aspect, first, the second receiving member is fixed to the first receiving member previously arranged under the floor of the existing building. Next, by supporting the second heat insulating material on the second receiving member, a heat insulating layer is formed by laminating the first heat insulating material and the second heat insulating material, and the lateral sides of the floor beams are covered with the heat insulating material. After that, the third heat insulating material is arranged inside the open cross section of the floor beam, and the third receiving member is fixed to the second receiving member. Thereby, a 3rd heat insulating material is supported from the building downward side by a 3rd receiving member. In this way, by adding members to the existing underfloor structure including the first receiving member and the first heat insulating material, the heat insulating effect of the floor beam by the heat insulating material can be enhanced.

As described above, the floor insulating material fixing structure according to the first aspect has the excellent effect of achieving uniform quality during construction and increasing versatility.

The fixing structure of the floor heat insulating material according to the second aspect has an excellent effect of suppressing the production cost of the member.

The fixing structure of the floor heat insulating material according to the third aspect has an excellent effect of facilitating the construction by assembling the members together by a simple method.

The fixing structure of the floor heat insulating material according to the fourth aspect has an excellent effect of facilitating implementation by simplifying the structure of the member.

The fixing structure of the floor heat insulating material according to the fifth aspect has an excellent effect that the heat insulating effect of the floor beam by the heat insulating material is enhanced, and an increase in the size of the fixing structure of the heat insulating material can be suppressed.

The method of fixing the floor insulating material according to the sixth aspect has an excellent effect that the insulating material can be replenished to the underfloor without damaging the existing underfloor structure and the heat insulating effect of the floor beam can be enhanced in the underfloor repair work. have.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the building to which the fixing structure of the floor heat insulating material which concerns on 1st Embodiment was applied. FIG. 2 is an enlarged cross-sectional view showing a partially enlarged state cut along line 2-2 of FIG. 1; FIG. 3 is a partially enlarged perspective view showing the floor beam shown in FIG. 2; (A) is a side view of the state before assembly of the common support member shown in FIG. 2 as seen from a direction perpendicular to the extending direction of the floor beam, and (B) is a common support member shown in FIG. 2 is a front view of the state before assembly, viewed from the extending direction of the floor beam. FIG. FIG. 4 is a schematic cross-sectional view schematically showing a state cut along line 5-5 in FIG. 3; FIG. 4 is a schematic cross-sectional view schematically showing a state cut along line 6-6 in FIG. 3; (A) to (E) are schematic diagrams for explaining a method of fixing the floor insulating material according to the first embodiment. FIG. 7 is a schematic cross-sectional view, corresponding to FIG. 6, showing a fixing structure for a floor heat insulating material according to a second embodiment;

[First embodiment]
A building 10 to which the floor insulating material fixing structure according to the first embodiment is applied will be described below with reference to FIGS. 1 to 7. FIG.

(Overall configuration of building 10)
As shown in FIG. 1, building 10 is a unit building. The building 10 is constructed by installing a plurality of lower floor building units 16 on a foundation 14 and then installing a plurality of upper floor building units 18 on the lower floor building units 16. there is The foundation 14 is provided continuously along the entire perimeter of the building 10, and the inner space surrounded by the foundation 14 serves as an underfloor space 20 (see FIG. 2).

Each building unit 16, 18 is joined to four pillars 22 and the upper end of each pillar 22, and joined to the lower end of each pillar 22 by a ceiling girder 24 having a substantially rectangular shape in a plan view. and a floor girder 26 having a substantially rectangular shape in plan view. Thereby, the building units 16 and 18 are made into a skeleton frame.

Between the pair of longitudinal floor girders 26 are bridged a plurality of small floor girders 28 arranged substantially parallel to the lateral floor girders 26 . A floor plate 30 is fixed using the floor girders 26 and the floor small girders 28 as a floor base. The floor board 30 of this embodiment uses a particle board, and has a configuration in which an underfloor material (reference numerals omitted) is adhered thereon. Note that the small floor beams 28 correspond to the "floor beams" in the present invention.

(Floor insulation fixing structure)
As shown in FIGS. 2 and 3, the floor girders 26 are made of channel steel and are formed in a substantially U-shape when viewed in vertical cross section. Structurally, there are a web portion 26A arranged along the height direction of the building, an upper flange portion 26B projecting substantially horizontally from the upper end of the web portion 26A, and an upper flange portion projecting substantially horizontally from the lower end of the web portion 26A. The floor girders 26 are configured by the lower flange portion 26C arranged opposite to the portion 26B. One end of the floor plate 30 is placed on the upper flange portion 26B of the floor girders 26 .

On the other hand, the small floor beam 28 is made of steel. The small floor beam 28 is made of channel steel with an irregular shape, and is formed to have an open cross-section when viewed in vertical cross-section. Structurally, a web portion 28A extending in the building height direction, an upper flange portion 28B extending substantially horizontally from the upper end of the web portion, and a flange width narrower than the upper flange portion 28B are formed, The small floor beam 28 is formed by a lower flange portion 28C extending substantially horizontally from the lower end of the web portion and a folded portion 28D hanging down from the tip of the upper flange portion 28B and disposed facing the web portion 28A. It is configured. A floor plate 30 is placed on the upper flange portion 28B.

A first heat insulating material 34 made of polystyrene foam is arranged on the lower surface 30A side of the floor plate 30 . This first heat insulating material 34 is laid between the adjacent floor girders 26 and floor girders 28 and between a pair of adjacent floor girders 28. It is supported from the lower side of the building by the receiving member 36 .

As shown in FIGS. 3 and 5, the first receiving member 36 is formed by bending a long steel plate. This first receiving member 36 is open to the lower side of the building and extends in a direction away from each other from a first fixing portion 36A that is bent into a substantially U shape and both ends (lower ends) of the first fixing portion 36A. A pair of first support portions 36B are provided.

The first fixing portion 36A bent in a U-shape covers the small floor beam 28 so that the upper part of the small floor beam 28 is inserted inside the open end. In this state, the first fixing portion 36A is sandwiched between the floor plate 30 and the upper flange portion 28B of the floor beam 28. As shown in FIG. Thereby, the first receiving member 36 is fixed to the small floor beam 28 . A pair of first support portions 36B extend in a direction away from the web portion 28A on both sides of the floor beam 28, respectively, and support one end of the first heat insulating material 34 from the lower side of the building. At the tip of the first support portion 36B, a claw portion (reference numeral omitted) for locking the first heat insulating material 34 is formed. The claw portion engages the first heat insulating material 34 by biting into the lower surface of the first heat insulating material 34, thereby preventing displacement of the heat insulating material.

As shown in FIG. 3, a second heat insulating material 40 made of glass wool is arranged on the lower side of the building of the first heat insulating material 34 . The second heat insulating material 40 is laid between the adjacent floor girders 26 and 28 and between a pair of adjacent floor girders 28 . Furthermore, the inside of the open cross section of the floor beam 28 is filled with a third heat insulating material 42 made of glass wool. The second heat insulating material 40 and the third heat insulating material 42 are supported by a pair of common receiving members 44 having the same shape on the open end side of the open cross section of the floor beam 28 . One of the pair of common receiving members is fixed to the first receiving member 36 and the other is fixed to one common receiving member 44 fixed to the first receiving member 36 . Hereinafter, for convenience of explanation, the one fixed to the first receiving member may be referred to as the second receiving member 46 and the other may be referred to as the third receiving member 48 . Further, when the second receiving member 46 and the third receiving member 48 are not distinguished from each other, they will be described as a common receiving member 44 .

As shown in FIG. 4, the common receiving member 44 is formed by bending a rectangular plate made of steel plate into an L shape. Structurally, a first wall portion 44A that forms the long side of the L-shape and a second wall portion 44B that extends in different directions from one end of the first wall portion 44A and forms the short side of the L-shape. and , the common receiving member 44 is configured. Further, before the common receiving member 44 is assembled, the angle θ1 formed by the first wall portion 44A and the second wall portion 44B is an acute angle. In this embodiment, as an example, θ1=85°.

Further, the common receiving member 44 is provided with a second fixing portion 50 and a third fixing portion 54 on both sides of the first wall portion 44A in the plate width direction. The second fixing portion 50 is a slit-shaped notch extending from one side of the first wall portion 44A toward the center along the plate width direction. The second fixing portion 50 has a stepped portion 52 formed on the upper edge portion 50A of the notch, and is configured such that the slit width on the open end side of the notch is smaller than that on the opposite end portion. there is Also, the open end side of the notch is chamfered. This allows the first support portion 36B to be smoothly inserted into the second fixing portion 50 in a process described later. Further, after assembly, the first support portion 36B is inserted deep into the notch of the second fixing portion 50, and the stepped portion 52 functions as a stopper to restrict the movement of the first support portion 36B. This prevents the second receiving member from coming off the first receiving member 36 .

On the other hand, the third fixing portion 54 is formed as a slit-shaped notch extending from the other side of the first wall portion 44A toward the center along the plate width direction at a portion below the second fixing portion 50. there is

The second wall portion 44B of the common receiving member 44 is formed with a through hole 53 penetrating in the plate thickness direction on the distal end side in the extending direction. One end of a fixing member 58 to be described later can be engaged with the through hole 53 .

As shown in FIGS. 3 and 5 , the second receiving member 46 is fixed to the first receiving member 36 via the second fixing portion 50 . Specifically, the second receiving member 46 is fixed to the first receiving member 36 by inserting the base end portion of the first support portion 36</b>B into the notch of the second fixing portion 50 . In this state, the first wall portion 44A is arranged along the extending direction of the web portion 28A of the small floor beam 28. As shown in FIG. A portion of the first wall portion 44</b>A above the second fixing portion 50 is held between the first fixing portion 36</b>A of the first receiving member 36 and the first heat insulating material 34 . On the other hand, the second wall portion 44B is arranged in a posture extending in a direction away from the web portion 28A. One end of the second heat insulating material 40 laid on the lower side of the first heat insulating material 34 is supported from the lower side of the building by the second wall portion 44B. The second wall portion 44B of the second receiving member 46 corresponds to the "second support portion" in the present invention.

3 and 6, the third receiving member 48 is fixed to the second receiving member 46 via the third fixing portion 54. As shown in FIGS. Specifically, first, the first wall portion 44A of the third receiving member 48 is arranged in a posture orthogonal to the first wall portion 44A of the second receiving member 46, and the open end side of the third fixing portion 54 is placed in the third position. 2 The first wall portion 44A of the receiving member 46 is opposed. Next, when the first wall portion 44A of the second receiving member 46 is inserted into the notch of the third fixing portion 54 of the third receiving member 48, the base end portion of the first wall portion 44A of the third receiving member 48 is It is placed on the second wall portion 44B of the receiving member 46 . Thereby, the third receiving member 48 is fixed to the second receiving member 46 .

In this state, the base end portion of the first wall portion 44A of the third receiving member 48 is sandwiched between the second wall portion 44B of the second receiving member 46 and the second heat insulating material 40 . Further, the tip (one end) of the first wall portion 44A extends in a direction close to the web portion 28A and is arranged below the third heat insulating material 42 arranged inside the floor beam 28 . Thereby, the third heat insulating material 42 is supported by the third receiving member 48 from the lower side of the building. The portion of the third receiving member 48 on the tip side of the first wall portion 44A corresponds to the "third support portion" in the present invention.

As shown in FIGS. 2 and 3, the second receiving member 46 is provided with a fourth heat insulating material that covers the building lower side of the floor beam 28 . The fourth heat insulating material 56 is made of glass wool and housed in a bag made of polyethylene (PE) film. The fourth heat insulating material 56 is formed in an elongated columnar shape and arranged along the extending direction of the floor beam 28 . In this embodiment, the lower ends of the floor beams 28 protrude to the lower side of the building of the second heat insulating material 40 . The fourth heat insulating material covers the lower ends of the floor beams 28 and prevents the lower ends of the floor beams 28 from being directly exposed to the outside air. In this way, the floor beam 28 is constructed so that the entire outer surface is covered using the first heat insulating material 34, the second heat insulating material 40, the third heat insulating material 42, and the fourth heat insulating material 56. .

The fourth heat insulating material 56 is fixed to the second receiving member 46 using a fixing member 58 as fixing means. Specifically, the fixing member 58 includes a string member 60 and hooks 62 attached to both ends of the string member 60 . The string members 60 are stretched from the lower side of the fourth heat insulating material 56 between the second receiving members respectively arranged on both sides of the floor beam 28 . Hooks 62 attached to both ends of the string member 60 are engaged with the through holes 53 of the second receiving member 46, respectively.

In this embodiment, the size of the fourth heat insulating material 56 and the length of the cord member 60 are set so that the second wall portion 44B is slightly elastically deformed by the tension of the fixing member 58 when the fourth heat insulating material 56 is assembled. etc. have been adjusted. As an example, it is preferable to elastically deform the second wall portion 44B so that the angle θ1 formed by the first wall portion 44A and the second wall portion 44B becomes θ1=90° after assembly. As a result, the fourth heat insulating material 56 is lifted by the restoring force of the second wall portion 44B, and the mounting strength to the small floor beam 28 is improved.

Next, a method of fixing the floor insulating material for applying the fixing structure of the floor insulating material of the present embodiment to the building 10 will be described with reference to FIG.

The fixing method of the floor insulating material described below is applied, as an example, to underfloor repair work for supplementing the underfloor space 20 of the building 10 with the second insulating material 40, the third insulating material 42, and the fourth insulating material 56. . In the underfloor space 20 of the building 10, a first support member 36 is fixed to the floor beams 28, and a first heat insulating material 34 is supported between the adjacent floor beams 28 supported by the first support members 36. is laid.

(1) As shown in FIG. 7A, first, a worker crawls into the underfloor space 20 of the building 10 and fixes the second receiving member 46 to the first receiving member 36 . Specifically, it is fixed by inserting the first support portion 36B into the notch of the second fixing portion 50 (see FIG. 3). As a result, the second receiving member 46 is suspended from the first receiving member 36 .
(2) Next, as shown in FIG. 7B, one end of the second heat insulating material 40 is inserted between the first heat insulating material 34 and the second wall portion 44B of the second receiving member 46, 2 The heat insulating material 40 is supported by the second receiving member 46 .
(3) Next, as shown in FIG. 7(C), the inside of the open cross section of the floor beam 28 is filled with the third heat insulating material 42 . After that, as shown in FIG. 7(D), the third receiving member 48 is fixed to the second receiving member 46 . Specifically, the third fixing portion 54 of the third receiving member 48 is tilted so that the first wall portion 44A of the third receiving member 48 is perpendicular to the first wall portion 44A of the second receiving member 46. The first wall portion 44A of the second receiving member 46 is inserted into. As a result, the third receiving member 48 is fixed to the second receiving member 46 and at the same time, the third heat insulating material 42 is supported from the lower side of the building using the third receiving member 48 .
(4) Finally, the fixing member 58 is used to fix the fourth heat insulating material 56 to the second receiving member 46, as shown in FIG. 7(E). Specifically, the fourth heat insulating material 56 is attached to the lower side of the floor beam 28 , and the string member 60 of the fixing member 58 is stretched from the lower side of the fourth heat insulating material 56 . Then, the hooks 62 attached to both ends of the string member 60 are engaged with the second receiving members 46 arranged on both sides of the small floor beam 28 . This completes the enforcement.

(action/effect)
Next, the operation and effects of this embodiment will be described.

In this embodiment, by laying the first heat insulating material 34 and the second heat insulating material 40 side by side on the lower side of the floor plate 30, the heat insulating material is arranged so as to cover the outer surface of the floor beam 28 from the side. be done. A third heat insulating material 42 is arranged inside the open cross section of the floor beam 28 . As a result, the side surfaces of the floor beams 28 can be covered with the heat insulating material without gaps, and the heat insulating performance of the floor beams 28 is enhanced.

Further, in the present embodiment, the second receiving member 46 and the third receiving member 48 are each composed of a common receiving member 44 having the same shape. The common receiving member 44 includes a first wall portion 44A and a second wall portion 44B extending in a direction different from that of the first wall portion 44A, and is fixed to the first receiving member 36 on the first wall portion 44A side. and a third fixing portion 54 for fixing the third receiving member 48 to the second receiving member 46 are provided. In one common receiving member 44 of the second receiving member 46, the first wall portion 44A is fixed to the first receiving member 36 via the second fixing portion 50, and the second wall portion 44B is fixed to the web portion 28A. , and supports one end of the second heat insulating material 40 from the lower side of the building. On the other hand, in the other common receiving member 44 constituting the third receiving member 48, when the first wall portion 44A is fixed to the second receiving member 46 side via the third fixing portion 54, the first wall portion 44A is The tip extends in a direction close to the web portion 28A and supports the third heat insulating material 42 from the lower side of the building.

In this way, since the second receiving member 46 and the third receiving member 48 are shared by using the same common receiving member 44, the second receiving member and the third receiving member are configured with members having different shapes. The number of types of members can be reduced as compared with the case where This will reduce the production cost of parts.

Further, in the present embodiment, by arranging the first wall portions 44A of the pair of common receiving members 44 in a posture orthogonal to each other, the third fixing portion 54 of the other common receiving member 44 is attached to the one common receiving member 44. can be fixed. Therefore, the pair of common receiving members 44 can be fixed to each other by a simple method of changing the posture of the common receiving members 44, so that it can be easily performed.

In addition, in this embodiment, the second support members 46 are arranged on both sides of the floor beam 28, respectively. A covering fourth heat insulating material 56 is fixed. For this reason, even if the dimension of the web portion 28A of the floor beam 28 is longer than the thickness of the heat insulating layer in which the first heat insulating material 34 and the second heat insulating material 40 are laminated, the fourth heat insulating material 56 can cover the lower part of the floor beam 28 with . As a result, the heat insulating effect of the floor beam 28 by the heat insulating material is enhanced.

Further, according to the method of fixing the floor insulating material described above, the building 10 provided with the first receiving member 36 and the first insulating material 34 is newly provided with the second insulating material 40 , the third insulating material 42 , and the fourth insulating material 56 . can be added. In this way, the heat insulating material can be replenished under the floor without damaging the existing underfloor structure, and the heat insulating effect of the small floor beams 28 by the heat insulating material can be enhanced. In addition, since tools such as hammers are not required during construction, construction is easy even in buildings with small underfloor spaces.

[Second embodiment]
A fixing structure for the floor heat insulating material according to the second embodiment will be described below with reference to FIG. 8 . In addition, about the same component part as 1st Embodiment mentioned above, the same number is attached and the description is abbreviate|omitted.

As shown in this figure, the second embodiment is characterized in that the shape of the third receiving member 70 is different from that of the first embodiment. The third receiving member 70 is formed by bending a long steel plate. The third receiving member 70 is provided at one end in the longitudinal direction with a third fixing portion 70A formed in a clip shape by folding the one end. In addition, the third receiving member 70 has a third supporting portion 70B at the other end side in the longitudinal direction, and is capable of supporting the third heat insulating material 42 .

The third receiving member 70 can be fixed to the second receiving member 46 via a third fixing portion 70A. Specifically, it is fixed by inserting the second wall portion 44B into the third fixing portion 70A. In this state, the third support portion 70B extends toward the web portion 28A and is arranged below the third heat insulating material 42 . Thereby, the third heat insulating material 42 is supported from the lower side of the building by the third support portion 70B.

According to the above configuration, the third receiving member 70 is made of a single plate material, and one end in the longitudinal direction is the third fixing portion 70A formed in a clip shape, and the second wall of the second receiving member 46 is provided. The portion 44B can be clamped. On the other hand, the other end in the longitudinal direction serves as a third support portion 70B extending in a direction approaching the web portion 28A. In this way, the third receiving member 70 has a simple structure in which one end of a single plate member is folded back. Can be easily fixed. Therefore, construction can be easily performed.

[supplementary explanation]
In each of the above-described embodiments, the fixing structure of the floor heat insulating material according to the present invention is applied to the floor beam 28, but the present invention is not limited to this. For example, it may be configured to be applied to floor girders and joists.

Further, in each of the above-described embodiments, the small floor beams 28 are configured as deformed channel steel, but the configuration is not limited to this. The floor beams may be constructed of angle steel or other section steel having an open cross section such as I-beam.

Further, in the above-described embodiments, in the step of fixing the floor heat insulating material, the third heat insulating material 42 is installed after the second heat insulating material 40 is installed, and the fourth heat insulating material 56 is installed after the third receiving member 48 is installed. Although the step of installing is described, the present invention is not limited to this. After installing the third heat insulating material 42 and the third receiving member 48, the second heat insulating material 40 may be installed, and finally the fourth heat insulating material 56 may be installed. Alternatively, the step of installing the fourth heat insulating material 56 after installing the third heat insulating material 42 and the third receiving member 48 and finally installing the second heat insulating material 40 may be employed.

10 Building 28 Small floor beam (floor beam)
28A web portion 28B upper flange portion 30 floor plate 34 first heat insulating material 36 first receiving member 36A first fixing portion 36B first supporting portion 40 second heat insulating material 46 second receiving member (one common receiving member)
42 Third heat insulating material 44 Common receiving member 44A First wall portion 44B Second wall portion 48 Third receiving member (other common receiving member)
50 Second fixing part 54 Third fixing part 56 Fourth heat insulating material 58 Fixing member (fixing means)
70 Third receiving member 70A Third fixing part 70B Third supporting part

Claims (6)

It is formed in an open cross-sectional shape including a web portion arranged at a predetermined interval under the floor and extending at least in the height direction of the building, and an upper flange portion extending substantially horizontally from the upper end of the web portion. a plurality of floor beams that support the floorboards from the lower side of the building;
a first fixing portion sandwiched between the floor plate and the upper flange portion; and a first support portion extending from the first fixing portion in a direction away from the web portion, the a first receiving member that supports the first heat insulating material laid between the floor beams from the lower side of the building with the first supporting portion;
a second fixing portion fixed to the first receiving member; and a second support portion extending from the second fixing portion in a direction away from the web portion, the building lower side of the first heat insulating material A second receiving member that supports the second heat insulating material laid between the floor beams from the lower side of the building with the second support part;
a third fixing portion fixed to the second receiving member; and a third supporting portion extending from the third fixing portion in a direction approaching the web portion; a third receiving member that supports the arranged third heat insulating material from the lower side of the building with the third supporting portion;
Fixed structure of floor insulation with The second receiving member and the third receiving member are
A first wall portion provided with the second fixing portion and the third fixing portion, and a second wall portion extending in a direction different from that of the first wall portion. is,
The second receiving member has the first wall portion fixed to the first receiving member via the second fixing portion, and the second wall portion extending in a direction away from the web portion. It is one common receiving member that constitutes the 2 support parts,
In the third receiving member, the first wall portion is fixed to the one common receiving member via the third fixing portion, and one end of the first wall portion extends in a direction approaching the web portion. It is the other common receiving member that constitutes the third support part,
The fixing structure of the floor heat insulating material according to claim 1. In the other common receiving member, the first wall portion of the other common receiving member is arranged in a posture substantially orthogonal to the first wall portion of the one common receiving member, thereby The third fixing portion can be fixed to the one common receiving member,
The fixing structure of the floor heat insulating material according to claim 2. The third receiving member is composed of a single plate material,
The third fixing portion formed in a clip shape by folding the one end is provided on one end side of the plate member, and the other end side of the plate member extends from the third fixing portion in a direction approaching the web portion. the third support portion present is provided,
The third fixing portion can be fixed to the second receiving member by sandwiching the second support portion between the third fixing portions.
The fixing structure of the floor heat insulating material according to claim 1. A pair of the second receiving members are provided on both sides of the floor beam,
a fourth heat insulating material covering the lower side of the building of the floor beam;
fixing means for fixing the fourth heat insulating material to the second receiving member;
The fixing structure of the floor insulating material according to any one of claims 1 to 4, comprising: A method for installing a heat insulating material applied to the fixing structure of the floor insulating material according to any one of claims 1 to 5,
The second support member is installed under the floor of an existing building provided with the first heat insulation material laid between the plurality of floor beams that support the floorboard and the first support member that supports the first heat insulation material. A first step of fixing to the receiving member;
a second step of supporting the second heat insulating material on the second receiving member;
a third step of arranging the third heat insulating material inside the open cross section of the floor beam;
a fourth step of fixing the third receiving member to the second receiving member and supporting the third heat insulating material on the third receiving member;
Method of fixing floor insulation, including: