Heat insulation structure of steel framed building

Abstract

To provide a heat insulation structure of a steel framed building suitable for installing board-shaped heat insulation material that is highly self-supporting and easy to obtain uniform heat insulation performance in a structural surface of a skeleton framework without any gaps.SOLUTION: A flange 31 of a beam 3 erected on an outer periphery of a steel framed building has mounting holes 33 formed at appropriate intervals along a length of the beam. For example, cylindrical heat insulation material mounting members 51 are inserted into a plurality of locations of the mounting holes 33 with their lower portions protruding below the beam 3. Meanwhile, a board-shaped under-beam heat insulation material 41 erected below the beam 3 has cylindrical or semi-cylindrical mounting recesses 52, 53 formed therein. A lower part of the heat insulation material mounting member 51 is inserted into the mounting recesses 52, 53, to prevent the under-beam heat insulation material 41 from falling in an indoor / outdoor direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The invention disclosed in this application relates to a thermal insulation structure for the outer periphery of a steel-framed building. [Background technology]

[0002] A known thermal insulation structure for use in the outer periphery of a steel-framed building is to erect an interior wall base panel, which is an integrated frame and thermal insulation material, inside or slightly inside the structural plane of the framework surrounded by the columns and beams of the outer periphery, to form an insulation line, and then to apply interior wall finishing materials such as gypsum board or wallpaper to the interior wall base panel. The frame of such an interior wall base panel is formed using wood or lightweight steel material, and the thermal insulation material is often a board-shaped insulation material made of a foamed resin such as polystyrene foam or polyethylene foam, or a fiber-based insulation material made of mineral fibers such as glass wool or rock wool formed into a mat shape. The present applicant has also proposed and put into practical use such an insulation structure in which an interior wall base panel of this type is erected inside the structural plane of the framework in Patent Documents 1 and 2, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-266417 [Patent Document 2] JP 2010-037873 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional heat-insulating structure, the interior wall base panel is fixed to the pillars and beams that make up the framework via metal mounting members. Therefore, even if the interior wall base panel is erected slightly away from the framework, a thermal bridge is formed via the mounting members that connect the framework and the interior wall base panel, which may become a weak point in the heat-insulating design. This is especially a concern when lightweight steel with high thermal conductivity is used for the frame that makes up the interior wall base panel. In addition, the gap that is formed between the framework and the interior wall base panel around the installation location of the mounting members is also likely to become a break in the insulation line.

[0005] The invention disclosed in this application was conceived to eliminate the aforementioned weaknesses in thermal insulation design, and aims to form a seamless thermal insulation line between the framework of the outer periphery of a steel-framed building and the interior wall base. To this end, we propose a thermal insulation structure for a steel-framed building that is suitable for installing the thermal insulation material without gaps within the structural surface of the framework of the building. [Means for solving the problem]

[0006] The insulation structure of a steel-framed building adopted by the present application to achieve the above-mentioned objective is characterized as comprising a beam material that is erected on the outer periphery of a steel-framed building, has at least one flange, and has mounting holes that penetrate the flange at multiple locations along the length of the material, a board-shaped under-beam insulation material that is erected below the beam material, and an insulation material mounting member that is inserted into the mounting holes and fitted into the upper edge of the under-beam insulation material, wherein the under-beam insulation material is positioned on the beam material via the insulation material mounting member and is held so as not to fall in the indoor or outdoor direction.

[0007] Furthermore, the under-beam insulation is installed in multiple sheets below the beam material, and is arranged so that adjacent portions of the under-beam insulation are offset from the center of the column arrangement in the outer periphery, and at least one of the under-beam insulation sheets is positioned on the beam material via the insulation mounting member.

[0008] Furthermore, the adjacent side edges of the multiple pieces of under-beam insulation to be installed can be positioned below a specific mounting hole, and the insulation mounting member can be inserted into each of the side edges.

[0009] In this case, the insulation mounting member may be composed of two insulation mounting member segments, each segment being fitted into each of the side edges.

[0010] In addition, the insulation structure of the above-mentioned steel-framed building can also be one in which the under-beam insulation material is erected so that it continues on the indoor side from the column materials of the outer periphery, and the under-beam insulation material erected facing the column materials has a column-shaped recess formed by cutting out the part that interferes with the column materials.

[0011] In this case, it is more preferable that the under-beam insulation material in which the columnar recess is formed is made of a material having a lower thermal conductivity than the other under-beam insulation materials in which the columnar recess is not formed.

[0012] It is further preferable that the under-beam insulation material is installed so that it extends toward the interior side beyond the indoor side edge of the flange, and that a cross-beam insulation material covering the indoor side of the beam material is installed above the under-beam insulation material. Effect of the Invention

[0013] According to the insulation structure of a steel-framed building configured as described above, the board-shaped under-beam insulation can be precisely positioned and erected below a beam having at least one flange, and the upper edge of the under-beam insulation can be easily fixed in place with the beam in contact with or close to the beam.

[0014] In addition, this insulation structure makes it easy to fix the under-beam insulation in a state where its indoor surface extends slightly toward the indoor side beyond the side edge of the beam flange, thereby efficiently constructing a seamless insulation line between the framework of the steel-framed building's outer periphery and the interior wall base. [Brief description of the drawings]

[0015] [Figure 1] 1 is a vertical cross-sectional view of the outer periphery of a steel-framed building to which the invention disclosed in this application is applied. [Diagram 2] 1 is a partial perspective view illustrating an overview of a heat insulating structure according to an embodiment of the invention disclosed in the present application. [Diagram 3] A partial perspective view illustrating another means for fastening the under-beam insulation material to the beam material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] First Embodiment Figures 1 and 2 show an outline of a heat insulation structure applied to the outer periphery of a steel-framed building. This heat insulation structure forms a heat insulation line between the framework 1 and the interior wall substrate by erecting board-shaped heat insulation material (beam-under insulation material 41) toward the indoor side within the structural surface of the framework 1 surrounded by columns 2 (see Figure 2) and beams 3 on the outer periphery. The "board-shaped heat insulation material" in this invention is intended to be a flat molded body several centimeters to a dozen centimeters thick, mainly made of hard expandable resin (polystyrene foam, polyethylene foam, urethane foam, phenol foam, etc.).

[0017] In Fig. 1, reference numeral 61 denotes an exterior wall material, reference numeral 62 denotes a bracket connected to a beam 3 to connect the exterior wall material 61 to the framework, reference numeral 63 denotes a metal fitting for fixing the exterior wall material, and reference numeral 43 denotes a fiber-based insulation material filled on the outdoor side of the structural surface of the framework 1. An intra-wall air layer 64 is formed between this fiber-based insulation material 43 and the exterior wall material 61. Reference numerals 71 and 72 denote joist supports and ceiling joists that are suspended from beams (not shown) spanning the interior side to form a ceiling foundation, and reference numeral 73 denotes a ceiling board. Reference numerals 74 and 75 denote an interior wall foundation and gypsum board.

[0018] The beam insulation 41 is formed so that its height corresponds to the height from the floor surface (not shown) below the beam 3 to the underside of the beam 3 (beam underside dimension). Note that the "corresponding height" here refers to the height at which the upper edge abuts or is close to the underside of the beam 3 and can be comfortably held by the insulation mounting member 5 described below, and is roughly the same as the beam underside dimension or a height several mm smaller than that. Multiple beam underside insulation sheets 41 are erected adjacent to each other with no gaps along the length direction of the beam 3.

[0019] The main part of the invention disclosed in this application is a means for fastening the upper end edge of the under-beam insulation material 41 to the flange 31 on the lower side of the beam material 3 so that the under-beam insulation material 41 does not fall in the indoor / outdoor direction. The "beam flange" refers to at least one flat plate-like portion that protrudes substantially horizontally in a cross section perpendicular to the material axis of a beam material mainly made of H-shaped steel or similar shaped steel material (for example, a channel steel without a lip, a hat-shaped steel, a steel material in which two channel steel pieces are joined back-to-back, etc.). As shown in FIG. 2, the flange 31 of the beam material 3 to which this thermal insulation structure is applied has circular mounting holes 33 formed at multiple locations at appropriate intervals along the material length direction of the beam material 3. These mounting holes 33 are formed for the purpose of attaching other members to the beam material 3, and in this thermal insulation structure, the mounting holes 33 are used to fasten the under-beam insulation material 41 to the flange 31. The shape of the mounting hole 33 is not necessarily limited to a circle, but may be an oval, an ellipse, a square, a hexagon, or any other polygonal shape.

[0020] Then, the insulation mounting member 51 formed to match the shape of the mounting hole 33 is attached to a plurality of locations of the mounting hole 33. In the embodiment shown in FIG. 2, the insulation mounting member 51 having a substantially cylindrical shape is inserted into the mounting hole 33 with its lower portion protruding downward from the beam 3. This insulation mounting member 51 can be made of steel or other metal materials, but it is more preferable in terms of thermal insulation performance if it is made of a heat insulating material such as hard resin or wood having a lower thermal conductivity than metal. Note that the insulation mounting member 51 may be a hollow pipe rather than a solid column. Also, although not shown, the insulation mounting member 51 may have, for example, an enlarged diameter portion or a locking claw portion for preventing it from coming off formed at the upper end, or a substantially conical pointed portion formed at the lower end.

[0021] On the other hand, cylindrical mounting recesses 52 that approximately match the outer diameter of the insulating material mounting member 51 are formed at the upper end edge of the under-beam insulating material 41 at multiple locations in the middle part in the width direction of the under-beam insulating material 41. Also, semi-cylindrical mounting recesses 53 that approximately match the outer diameter of the insulating material mounting member 51 are formed at the upper part of each side edge where the under-beam insulating materials 41 are adjacent to each other. When the under-beam insulating material 41 is erected below the beam material 3 from its upper side, the lower part of the insulating material mounting member 51 is inserted into the cylindrical mounting recess 52, and the lower part of the insulating material mounting member 51 is embraced between the mounting recesses 53, 53 of the adjacent under-beam insulating materials 41, the under-beam insulating material 41 is held so as not to fall in the indoor / outdoor direction. If the material of the under-beam insulating material 41 is soft or if the lower end of the insulating material mounting member 51 is sharp, the mounting recesses 52 may not be formed and the insulating material mounting member 51 may be directly inserted into the under-beam insulating material 41. The under-beam insulation materials 41 erected along the longitudinal direction of the beam material 3 can be fixed to each other by sealing adjacent portions with tape (not shown), for example.

[0022] When holding the under-beam insulation 41, it is not necessary to insert the insulation mounting members 51 into all of the mounting recesses 52 in the middle of one piece of under-beam insulation 41 and into all of the mounting recesses 53 on the side edges where the under-beam insulation 41 are adjacent. Depending on the width dimension of the under-beam insulation 41, it may be sufficient to insert the insulation mounting members 51 into two mounting recesses 52, 53, either in the middle or on the side edges. Also, if the middle portion is omitted and the under-beam insulation 41 is held only by the mounting recesses 53 on the two side edges where the under-beam insulation 41 are adjacent, the number of insulation mounting members 51 required can be minimized.

[0023] Generally, in buildings with rigid frame construction using heavy steel frames, there are few braces or studs arranged within the structural plane of the framework 1, which can make it difficult to find support members when erecting or filling the insulation within the structural plane. However, by fastening the under-beam insulation 41 via the insulation mounting member 51 inserted into the mounting hole 33 of the beam 3, the under-beam insulation 41 can be erected efficiently with the upper edge of the under-beam insulation 41 abutting or close to the beam 3.

[0024] Furthermore, in this heat insulation structure, the beam under insulation material 41 is arranged so that its indoor side surface is aligned with the indoor side edge of the flange 31 of the beam material 3, or it slightly protrudes toward the indoor side from the indoor side edge of the flange 31 of the beam material 3. A beam crossing insulation material that covers the indoor side surface of the beam material 3 is also installed above the beam under insulation material 41. In the illustrated embodiment, a fiber-based insulation material 44 is filled in a recess surrounded by the upper and lower flanges 31 and webs 32 of the H-shaped steel that constitutes the beam material 3, and a board-shaped beam crossing insulation material 42 is installed on top of it on the indoor side. The beam crossing insulation material 42 is arranged so that its lower end edge is placed on the upper end edge of the beam under insulation material 41 that protrudes toward the indoor side from the side edge of the flange 31, and the contact point with the beam under insulation material 41 is fixed by sealing with tape (not shown). In the illustrated embodiment, the beam-crossing insulation material 42 protrudes slightly toward the indoor side compared to the beam-under insulation material 41, but it is also acceptable for the indoor-side surfaces of both insulation materials 41, 42 to be flush with each other.

[0025] In this way, an insulation line is formed on the indoor side of the framework 1 of the outer periphery of the steel-framed building, where the under-beam insulation material 41 and the cross-beam insulation material 42 are continuous without interruption. By making the indoor surface of the under-beam insulation material 41 and the cross-beam insulation material 42 slightly protrude indoors beyond the side edge of the flange 31 of the beam material 3, it is possible to prevent the flange 31 of the beam material 3 from protruding indoors beyond the insulation line and forming a thermal bridge. An appropriate film material (not shown) for the purpose of airtightness, moisture resistance, fire resistance, etc. can also be laminated on the indoor side of this insulation line. Then, the ceiling foundation and the interior wall foundation that surround the indoor space are installed so as to cut off from this insulation line.

[0026] In addition, in this heat-insulating structure, adjacent portions of the under-beam heat-insulating materials 41 erected along the length direction of the beam material 3 are arranged so as to be offset from the center line (structural center of the building frame) of the column arrangement in the outer periphery. As shown in FIG. 2, the under-beam heat-insulating material 41 with the column-shaped recess 21 cut out corresponding to the cross-sectional shape of the column material 2 is arranged on the indoor side of the portion facing the column material 2 arranged on the center line of the outer periphery. By adopting such an under-beam heat-insulating material 41, it is possible to form a continuous heat-insulating line on the indoor side of the column material 2 without interruption while avoiding interference between the column material 2 and the under-beam heat-insulating material 41, and it is possible to align the layout of the under-beam heat-insulating material 41 erected in the portion not facing the column material 2, thereby making efficient use of the heat-insulating material. The column material 2 is made of, for example, square steel or H-shaped steel, or is covered with a fireproof material or heat-insulating material, but the detailed cross-sectional shape is not particularly limited in this invention.

[0027] The under-beam insulation material 41 arranged facing the column material 2 may have a reduced thermal insulation performance in the portion that has become thinner due to the cutout of the columnar recess 21. Therefore, for the under-beam insulation material 41 in which the columnar recess 21 is formed, it is preferable to use a material with a lower thermal conductivity than the other under-beam insulation material 41 in which the columnar recess 21 is not formed. For example, it is recommended to use polystyrene foam, polyethylene foam, etc. for the other under-beam insulation material 41, and to use rigid urethane foam, high-performance phenol foam, etc. for the under-beam insulation material 41 in which the columnar recess 21 is formed. Rigid urethane foam, high-performance phenol foam, etc. have excellent thermal insulation performance, but are more expensive than polystyrene foam and polyethylene foam, so by using them only in the portion facing the column material 2, the material cost for the entire insulation structure can be reduced.

[0028] <Second embodiment> 3 shows another means for fastening the under-beam insulation 41 using the mounting hole 33 formed in the flange 31 of the beam 3. In the illustrated embodiment, a cylindrical insulation mounting member 55 that approximately matches the inner diameter of the mounting hole 33 is protrudingly provided on the upper end edge of the under-beam insulation 41. Also, a semi-cylindrical insulation mounting member division 56 that approximately matches the inner diameter of the mounting hole 33 is protrudingly provided on the upper part of each side edge where the under-beam insulation 41 are adjacent to each other. The cylindrical insulation mounting member 55 is inserted directly into the mounting hole 33, and the semi-cylindrical insulation mounting member division 56 is inserted into the mounting hole 33 together with the insulation mounting member division 56 of the adjacent under-beam insulation 41, so that the under-beam insulation 41 is held so as not to fall in the indoor / outdoor direction.

[0029] These insulation material mounting members 55 and insulation material mounting member segments 56 can be formed integrally with the beam insulation material 41 using the same material as the beam insulation material 41, or an attachment member as shown by reference numeral 560 in the figure can be formed from hard resin, wood, or other suitable insulating material and integrated by inserting it into the beam insulation material 41. The illustrated attachment member 560 is formed by combining a semi-cylindrical insulation material mounting member segment 56, an attachment piece 57 that is overlapped on the side edge of the beam insulation material 41, and a puncture piece 58 that is inserted into the side edge of the beam insulation material 41. However, the shape of the attachment member 560 is not limited to this and can be modified as appropriate.

[0030] Even when the under-beam insulation 41 is held via such insulation mounting members 55 and insulation mounting member segments 56, it is not necessary to provide the insulation mounting members 55 and insulation mounting member segments 56 for each under-beam insulation 41 at its middle portion and at all of the side edges where the under-beam insulation 41 are adjacent to each other. Depending on the width dimension of the under-beam insulation 41, it may be sufficient to provide the insulation mounting members 55 or insulation mounting member segments 56 at two locations, either the middle portion or the side edges, and insert them into the mounting holes 33. Also, if the middle portion is omitted and the under-beam insulation 41 is held by only the insulation mounting member segments 56 at two locations, at the side edges where the under-beam insulation 41 are adjacent to each other, the number of mounting members required can be minimized.

[0031] In this way, the board-shaped under-beam insulation material 41 can be efficiently installed below the beam material 3 having the flange 31. Moreover, the above-mentioned mounting means can be applied not only to the bottom of the beam material 3 as exemplified, but also to the side of a column material made of H-shaped steel or channel steel, by replacing the vertical and horizontal directions. Similarly, it can be applied to the insulation structure of a roof structure with a slope. Also, it can be used not only for insulation materials, but also for installing sound-absorbing materials and fire-resistant covering materials processed into similar board shapes.

[0032] The technical scope of the invention disclosed in this application should not be interpreted as being limited by the illustrated embodiment, but should be interpreted conceptually based on the claims. The illustrated thermal insulation structure is an example, and when implementing the invention disclosed in this application, the detailed shape, dimensions, structure, material, quantity, connection form with other elements, relative positional relationship, etc. of the components not specifically specified in the claims can be appropriately modified within a range that provides substantially the same or greater effect as the illustrated embodiment.

[0033] Furthermore, the embodiments and other matters disclosed in this specification can also be understood as the technical ideas described in the following supplementary notes. (Appendix 1) A beam material that is erected on the outer periphery of a steel-framed building, has at least one flange, and the flange has mounting holes formed at multiple locations along the length of the beam material that penetrate the flange; A board-shaped beam insulation material is installed below the beam material; An insulation mounting member that is inserted into the mounting hole and fitted onto the upper edge of the under-beam insulation material; Equipped with The beam insulation is positioned on the beam via the insulation mounting member and is held so as not to fall in the indoor / outdoor direction. A thermal insulation structure for a steel frame building. (Appendix 2) In the thermal insulation structure of the steel frame building described in Appendix 1, A plurality of the beam under-insulation materials are erected below the beam material, The adjacent portions of the under-beam insulation materials are arranged so as to be offset from the center of the column arrangement in the outer periphery portion, At least one piece of the under-beam insulation material is positioned on the beam material via the insulation material mounting member. A thermal insulation structure for a steel frame building. (Appendix 3) In the thermal insulation structure of the steel frame building described in Appendix 2, Each side edge where the under-beam insulation materials are adjacent to each other is disposed below a predetermined mounting hole, The heat insulating material mounting members are inserted into the side edges. A thermal insulation structure for a steel frame building. (Appendix 4) In the thermal insulation structure of the steel frame building described in Appendix 3, The insulation mounting member is composed of two insulation mounting member divisions, Each of the heat insulating material mounting member segments is fitted into each of the side edges. A thermal insulation structure for a steel frame building. (Appendix 5) In the thermal insulation structure of a steel-framed building described in Appendix 2, Appendix 3 or Appendix 4, The beam insulation material is erected so as to be continuous on the indoor side from the pillar material of the outer periphery, The under-beam insulation material that is built to face the pillar material has a columnar recess formed by cutting out the portion that interferes with the pillar material. A thermal insulation structure for a steel frame building. (Appendix 6) In the thermal insulation structure of a steel-framed building described in Appendix 5, The beam insulation material in which the columnar recess is formed is made of a material having a lower thermal conductivity than other beam insulation materials in which the columnar recess is not formed. 5. The heat-insulating structure of a steel-framed building according to claim 4. (Appendix 7) In the thermal insulation structure of a steel-framed building described in any one of Appendix 1 to Appendix 6, The beam insulation material is installed so as to protrude from the indoor side edge of the flange, A beam crossing insulation material is installed above the beam under insulation material to cover the indoor side of the beam material. A thermal insulation structure for a steel frame building. [Industrial Applicability]

[0034] The invention disclosed in this application can be widely used in heat insulation construction methods for steel-framed buildings. [Explanation of symbols]

[0035] 1 Frame frame 2 Pillar material 21 Pillar recess 3 Beam material 31 Flange 32 Web 33 Mounting hole 41 Beam insulation 42 Beam cross-section heat exchanger 43 Fiber-based insulation materials 44 Fiber-based insulation materials 51 Insulation mounting parts 52 Cylindrical mounting recess 53 Semi-cylindrical mounting recess 55 Insulation mounting parts 56 Insulation material mounting member division 560 Attachment parts 57 attached piece 58 Puncture piece 61 Exterior wall materials 62 Bracket 63 Exterior wall material fixing bracket 64 In-wall ventilation layer 71 Nobori Uke 72 Ceiling joist 73 Ceiling Panel 74 Interior wall base 75 Gypsum board

Claims

1. A beam material that is erected on the outer periphery of a steel-framed building, has at least one flange, and the flange has mounting holes formed at multiple locations along the length of the beam material that penetrate the flange; A board-shaped beam under-insulation material is installed below the beam material; An insulation mounting member that is inserted into the mounting hole and fitted onto the upper edge of the under-beam insulation material; Equipped with The beam-under insulation material is positioned on the beam material via the insulation material mounting member and is held so as not to fall in the indoor / outdoor direction. A thermal insulation structure for a steel frame building.

2. In the heat insulating structure of a steel frame building according to claim 1, A plurality of the beam under-insulation materials are erected below the beam material, The adjacent portions of the under-beam insulation materials are arranged so as to be offset from the center of the column arrangement in the outer periphery portion, At least one piece of the under-beam insulation material is positioned on the beam material via the insulation material mounting member. A thermal insulation structure for a steel frame building.

3. In the heat insulating structure of a steel frame building according to claim 2, Each side edge where the under-beam insulation materials are adjacent to each other is disposed below a predetermined mounting hole, The heat insulating material mounting members are inserted into the side edges. A thermal insulation structure for a steel frame building.

4. In the heat insulating structure of a steel frame building according to claim 3, The insulation mounting member is composed of two insulation mounting member divisions, Each of the heat insulating material mounting member segments is fitted into each of the side edges. A thermal insulation structure for a steel frame building.

5. In the heat insulating structure of a steel frame building according to claim 2, claim 3 or claim 4, The beam insulation material is erected so as to be continuous on the indoor side from the pillar material of the outer periphery, The under-beam insulation material that is built to face the pillar material has a columnar recess formed by cutting out the portion that interferes with the pillar material. A thermal insulation structure for a steel frame building.

6. In the heat insulating structure of a steel frame building according to claim 5, The beam insulation material in which the columnar recess is formed is made of a material having a lower thermal conductivity than other beam insulation materials in which the columnar recess is not formed. The heat insulating structure of a steel frame building according to claim 4.

7. In the heat insulation structure of a steel frame building according to claim 1, claim 2, claim 3, claim 4 or claim 5 which refers to claim 2, The beam insulation material is installed so as to protrude from the indoor side edge of the flange, A beam crossing insulation material is installed above the beam under insulation material to cover the indoor side of the beam material. A thermal insulation structure for a steel frame building.

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