JP5965685B2 - Insulating structure of beam and method for forming insulating line of building - Google Patents

Description

  The present invention relates to a heat insulating structure for beams and a method for forming a heat insulating line for buildings.

  2. Description of the Related Art In buildings such as houses, it is a common practice to form a frame such as a beam or a column with a steel frame and use an ALC (Autoclaved Lightweight Aerated Concrete panels) panel as an outer wall material. In addition, in this type of building, a heat insulating material is filled along the ALC panel for the purpose of energy saving by improving the heating efficiency and the cooling efficiency. The heat insulation effect as a building is obtained by the heat insulation property.

  On the other hand, in steel-frame buildings, the structural members such as beams and columns that make up the frame are made of iron or steel, etc., with high thermal conductivity, so the beams and columns that support the outer walls can transfer heat indoors and outdoors. There is a problem that it becomes a route and becomes a thermal bridge. In order to solve such a problem, it is preferable to provide a heat insulating material also to the structural members constituting these casings. However, the shape and engagement of these structural members are significantly more complicated than the flat plate surface of the outer wall. Therefore, research and development have been conducted on a method for attaching a heat insulating material that enables the structural member to effectively exhibit heat insulating properties.

  For example, Patent Document 1 discloses a configuration in which a heat insulation line is formed from the indoor side surface of the outer wall along the lower surface of the steel beam and the indoor side surface. The heat insulation line includes an outer wall heat insulating portion provided along the indoor side surface of the outer wall, a beam lower heat insulating portion provided around the indoor side end of the lower flange from the lower flange lower surface of the steel beam, and a steel frame. A beam-side heat insulating portion provided along the side surface on the indoor side of the beam is provided, and a heat insulating block used for a joint between the outer wall heat insulating portion and the beam lower heat insulating portion is provided.

JP 2010-37740 A

  However, the lower heat insulating part of the beam not only has a complicated shape that wraps around the end of the flange of the steel beam but also the flange, and the heat insulating block closes the joint between the outer wall heat insulating part and the lower heat insulating part of the beam. The problem is that not only the members for forming the heat insulation line are complicated in shape and it takes time to manufacture each member, but also the number of members increases, which in turn increases the work time. there were.

  The present invention has been made to solve such a problem, and even when forming a heat insulation line extending from the outer wall to the steel beam, the number of members can be suppressed as much as possible and the construction work (construction process) is possible. An object of the present invention is to provide a heat insulating structure for beams and a method for forming a heat insulating line for buildings that can be suppressed as much as possible.

  A heat insulating structure of a beam according to the present invention includes a floor slab, a steel beam that supports the floor slab, an outer wall that is supported by the steel beam so as to face a side surface on the outdoor side of the steel beam, a lower surface of the steel beam from the outer wall, and A heat-insulating line forming portion provided over the side surface on the indoor side, and the heat-insulating line forming portion includes a beam-side heat insulating portion that covers the side surface on the indoor side of the steel beam and an outer wall heat-insulating portion that covers the side surface on the indoor side of the outer wall. And a lower heat insulating part that covers the lower surface of the steel beam and connects the outer wall heat insulating part and the beam side heat insulating part, and the lower heat insulating part is formed in a flat plate shape wider than the width of the steel beam. And it is provided in the state which made the lower surface of the outdoor side small edge part contact | abut to the upper edge small edge surface of an outer wall heat insulation part.

  According to the heat insulating structure for a beam according to the present invention, the heat insulating portion under the beam is formed in a flat plate shape, so that simplification as a member is achieved. In addition, since the member is installed facing the lower part of the steel beam, it may fall during construction, but the lower edge of the outdoor side small edge part of the heat insulating part under the beam hits the upper edge of the outer wall heat insulating part. In this way, the under-beam heat insulating portion is sandwiched between the outer wall heat insulating portion and the steel beam, and the fall is prevented. Thereby, the effort of construction for fall prevention can be reduced. As described above, even when the heat insulation line extending from the outer wall to the steel beam is formed, the number of members can be suppressed as much as possible, thereby reducing the construction labor (construction process) as much as possible.

  Further, according to the heat insulating structure of the beam according to the present invention, the steel beam is provided with a support fitting that supports the outer wall and a fixture that fixes the support fitting to the steel beam, and the fixture is a lower surface of the steel beam. The under-beam heat insulating portion has a thickness that is at least larger than the protruding length of the protruding portion, and is provided below the lower surface of the steel beam in a state of being pierced by the protruding portion. It is preferable. According to this, the under-beam heat insulating portion is temporarily fixed by being pierced by the protruding portion of the fixture. As a result, it is possible to reduce the time and labor required for holding the heat insulating part under the beam in a state of facing the lower surface of the steel beam (or to further reduce the frequency of dropping when the member is applied). Further, since the thickness of the heat insulating part under the beam is larger than the protruding length of the protruding part of the fixture, even if the heat insulating part under the beam is pierced into the protruding part of the fixing tool, the fixing tool is There is no possibility of penetrating the heat insulating part, and thereby it is possible to avoid breakage of the heat insulating line accompanying such construction. In addition, the fixture is provided in the beam installation space on the inner side of the heat insulating material and the outer wall, so that it cools in contact with the air in the space, but the cooling is avoided by avoiding breakage of the heat insulation line as described above. The contact between the fixture and the indoor air is avoided, and the occurrence of condensation due to these contacts is prevented.

  Further, in the heat insulating structure of the beam according to the present invention, the steel beam is provided with a support bracket that supports the outer wall and a fixture that fixes the support bracket to the steel beam, and the fixture projects from the lower surface of the steel beam. The heat insulating part under the beam has a bulging property that allows the protrusion to be bulged by press-fitting, and is provided below the lower surface of the steel beam in a state of being pierced by the protruding part. It is preferable that According to this, the heat insulating part under the beam is temporarily fixed by being stabbed into the protruding part of the fixture, and thereby the heat insulating part under the beam is kept facing the lower surface of the steel beam. It is possible to reduce the time and labor for construction (or to further reduce the frequency of dropping during construction of the member). In addition, since the under-beam heat insulating portion has the bulging property as described above, even if the under-beam heat insulating portion is stabbed into the protruding portion of the fixing tool, there is no possibility that the fixing tool penetrates the under-heat insulating portion. Thus, it is possible to avoid breakage of the heat insulation line accompanying such construction. In addition, the fixture is provided in the beam installation space on the inner side of the heat insulating material and the outer wall, so that it cools in contact with the air in the space, but the cooling is avoided by avoiding breakage of the heat insulation line as described above. The contact between the fixture and the indoor air is avoided, and the occurrence of condensation due to these contacts is prevented.

  Further, in the heat insulating structure of the beam according to the present invention, each heat insulating portion is formed with airtightness, and an airtight tape extends from one heat insulating portion to the other heat insulating portion at the joint of each heat insulating portion. Is preferably affixed. Thereby, since the joint between heat insulation parts will be block | closed with an airtight tape, it can match with the heat insulation line formed by connecting a heat insulation part, and an airtight line can be formed.

  The building heat insulation line forming method according to the present invention includes a floor slab, a steel beam that supports the floor slab, and an outer wall that is supported by the steel beam so as to face the side surface of the steel beam on the outdoor side. In contrast, a heat insulation line forming method for a building that forms a heat insulation line from the outer wall to the lower surface of the steel beam and the side surface on the indoor side, wherein the plate-like under-heat insulation portion covering the lower surface of the steel beam is the steel beam A first step of temporarily fixing to the lower surface of the outer wall of the outer wall of the outer wall with a flat plate-like outer wall heat insulating portion covering the indoor side surface of the outer wall in a state where the upper edge of the outer wall is in contact with the lower surface of the lower heat insulating portion of the beam The second step provided along the side surface and the plate-shaped beam-side heat insulation part covering the indoor side surface of the steel beam, with the lower edge of the lower surface contacting the upper surface of the under-beam heat insulation part And a third step provided along the inner side surface.

  According to the method for forming a heat insulation line for a building according to the present invention, the front face across the inside and the outside of the heat insulation line formed by these heat insulation portions is vertical by the procedure according to the first step, the second step, and the third step. The structure formed in the shape can be formed by a simple construction procedure. In addition, the under-beam heat insulating portion temporarily fixed to the lower surface of the steel beam in the first step is supported by the outer wall heat insulating portion in the subsequent second step (sandwiched between the steel beam and the outer wall heat insulating portion), The frequency of falling of the heat insulation part under the beam in the subsequent construction can be reduced as much as possible.

  The method for forming a heat insulation line for a building according to the present invention is for a building having a floor slab, a steel beam that supports the floor slab, and an outer wall that is supported by the steel beam so as to face the side surface on the outdoor side of the steel beam. A heat insulation line forming method for a building that forms a heat insulation line extending from the outer wall to the lower surface of the steel beam and the side surface on the indoor side. Of the steel beam, with the first step provided along the indoor side surface of the steel plate and a flat plate-like under-heat insulating portion covering the lower surface of the steel beam, with the upper surface in contact with the lower edge of the lower-side heat insulating portion. The second step of temporarily fixing to the lower surface and the indoor side surface of the outer wall in a state where the flat outer wall heat insulating portion covering the indoor side surface of the outer wall is in contact with the lower surface of the heat insulating portion under the beam And a third step provided along the line.

  According to the method for forming a heat insulation line for a building according to the present invention, the front face across the inside and the outside of the heat insulation line formed by these heat insulation portions is vertical by the procedure according to the first step, the second step, and the third step. The structure formed in the shape can be formed by a simple construction procedure. Moreover, the lower end edge surface of the beam side heat insulating portion provided on the side surface of the steel beam in the first step is joined to the indoor upper surface of the under beam heat insulating portion temporarily fixed in the subsequent second step, The heat insulation part under the beam can be supported, and the frequency of dropping of the heat insulation part under the beam in the subsequent construction can be reduced as much as possible.

  ADVANTAGE OF THE INVENTION According to this invention, even when forming the heat insulation line from an outer wall to a steel beam, the number of members can be suppressed as much as possible and construction labor (construction process) can be suppressed as much as possible.

It is sectional drawing of the building to which the heat insulation structure which concerns on embodiment of this invention was applied. It is sectional drawing of the heat insulation structure which concerns on embodiment of this invention. It is sectional drawing along the III-III line | wire shown in FIG. It is an expanded sectional view which shows the structure of temporary fixing of the heat insulation part under a beam. It is a figure which shows the structure of the beam floor heat insulation member which concerns on this embodiment. It is a figure which shows the structure of the beam floor heat insulation member which concerns on a modification. It is a cross section of the heat insulation structure which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2. As shown in FIG. 1, a building to which a heat insulating structure 100 according to the present invention is applied includes a foundation 10, a structural housing 11 assembled on the foundation 10, an outer wall 12 supported by the structural housing 11, and the outer wall. 12 is an assembly house, for example, on the second floor above the ground, formed with a heat insulation line forming portion 30 provided along the structural housing 11 and an interior structure 14 that forms the wall surface and ceiling surface of the room of the building.

  The foundation 10 is formed as a cloth foundation made of reinforced concrete having the same cross section continuous in the length direction of the outer wall 12 and the partition wall. The structural housing 11 includes a steel column (not shown) standing on the foundation 10, a steel beam 15 spanned between the steel columns, and a floor slab 16 supported by the foundation 10 and the steel beam 15. It is configured as a steel frame structure. Moreover, the structure which installs an earthquake-resistant element (illustration omitted) between steel frame pillars is also employable, and will be comprised as a steel frame brace structure in this case. The steel column is formed by a steel square pipe or by attaching a column head member or a column base member to an end of the square pipe. The seismic element is formed by connecting a pair of square pipes with braces or a damping frame.

  As shown in FIG. 2, the steel beam 15 is a so-called I-shaped steel or H-shaped steel formed by including a pair of upper and lower flanges 15 a and 15 b and a web 15 c connecting between the center portions of the pair of upper and lower flanges 15 a and 15 b. And is connected and supported to the steel column via a steel joint piece. The connection between the steel column, the joint piece, and the steel beam 15 is made by mechanical means such as high-strength bolt bonding, and as a result, the welded joint quality is eliminated regardless of the skill of the operator. Is constant. Further, an orthogonal (steel beam) 25 extending in a direction perpendicular to the steel beam 15 is joined to the steel beam 15. The orthogonal beam 25 includes a pair of upper and lower flanges 25a and 25b and a web 25c that connects between the center portions of the pair of flanges 25a and 25b. The orthogonal beam 25 is installed at the same height as the steel beam 15.

  The floor slab 16 includes a first floor slab 16a, a second floor slab 16b, and a roof slab 16c, and is formed by laying a plurality of flat floor panels made of lightweight cellular concrete (ALC). As shown in FIG. 1, the floor panel forming the first floor slab 16 a is supported by the foundation 10 with the end portion placed on the upper surface of the foundation 10. In addition, the floor panel forming the floor slab 16b and the roof slab 16c on the second floor has a rigid floor hardware (illustrated) attached to the steel beam 15 in a state where the end portion is placed on the upper surface of the upper flange 15a of the steel beam 15. (Omitted) is supported by the steel beam.

  The outer wall 12 includes a first-floor outer wall 12a and a second-floor outer wall 12b, and is formed by arranging a plurality of flat-walled lightweight cellular concrete (ALC) outer wall panels. Each outer wall panel has a height corresponding to at least the height of each floor from the lower surface of the floor slab 16 (16a, 16b) of each floor to the upper surface of the upper flange 15a of the steel beam 15. In addition, as shown in FIG. 2, the outer wall panels of each floor have upper and lower ends on the steel beam 15 and the foundation 10 via various support hardwares 17 attached to the steel beam 15 and the foundation 10 so as to protrude toward the outer wall panel. Is supported. As described above, the floor slab 16 and the outer wall 12 formed of lightweight cellular concrete are lightweight and have high heat insulation performance. In the present embodiment, an outer wall panel made of lightweight cellular concrete is adopted as the outer wall 12, but a panel made of PC concrete, a wooden panel or a siding, and those having an exterior member attached thereto, etc. The outer wall 12 may be formed of any material as long as the heat transfer coefficient is larger than that of the steel beam 15 so that the steel beam 15 forms a heat bridge relatively.

  Further, a gap is formed above the steel beam 15 at a position between the floor slab 16 supported by the steel beam 15 and the lower end portion of the outer wall 12 on the second floor facing the floor slab 16. The gap is a space for attaching various hardware 17 such as the above-mentioned hard floor hardware, self-weight receiving hardware and Inazuma plate to the beam, and the mortar 18 is filled after the installation of these various hardware 17, the floor slab 16 and the outer wall 12. Is done.

  The interior structure 14 includes a wall plate 19 that constitutes the wall surface of the living room, a base member 20 that supports the wall plate 19, a ceiling plate 21 that forms the ceiling of the living room, and a field edge that supports the ceiling plate 21. And a member 22. The base member 20 is assembled in a lattice shape at a position facing the outer wall 12 with a predetermined gap, and a wall plate 19 is laid on the base member 20 without any gaps.

  The field edge member 22 is assembled in a lattice shape at a position facing the floor slab 16 with a predetermined interval, and the ceiling plate 21 is laid on the field edge member 22 without a gap. Further, the field edge member 22 is supported by the steel beam via a suspended tree member (not shown). The in-wall space S1 formed by the gap between the wall plate 19 and the outer wall 12 and the ceiling back space S2 formed by the gap between the ceiling plate 21 and the floor slab 16 are communicated below the steel beam 15. Thus, piping and the like can be arranged from the ceiling space S2 to the wall space S1.

  Next, with reference to FIG.2 and FIG.3, the heat insulation structure 100 and the beam floor heat insulation member 50 which concern on this embodiment are demonstrated. 2 and 3 show only the heat insulation structure 100 around the beam 15 between the first floor and the second floor, but the structure around the beam 15 between the second floor and the roof has the same concept. . As shown in FIGS. 2 and 3, the heat insulating structure 100 is supported by the steel beam 15 so as to face the floor slab 16, the steel beam 15 that supports the floor slab 16, and the side surface of the steel beam 15 on the outdoor side. The outer wall 12 and the heat insulation line formation part 30 are provided.

  The heat insulation line forming portion 30 is provided along the lower surface of the steel beam 15 and the side surface on the indoor side from the outer wall 12 to insulate the floor immediately below the floor slab 16. The heat insulation line forming section 30 includes a plate-shaped beam-side heat insulation section 31 covering the indoor side surface of the steel beam 15, a plate-shaped floor-side heat insulation section 32 covering the lower surface of the floor slab 16, and an indoor side of the outer wall 12. A flat plate outer wall heat insulating portion 33 covering the side surface, a flat plate lower beam heat insulating portion 34 that covers the lower surface of the steel beam 15 and connects the outer wall heat insulating portion 33 and the beam side heat insulating portion 31, and a web 25c of the orthogonal beam 25 And a plate-like orthogonal beam heat insulating portion 36 that covers the plate. The beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are configured by a beam floor heat insulating member 50 obtained by bending a flat plate. The detailed configuration of the beam floor heat insulating member 50 will be described later. The outer wall heat insulating portion 33, the under-beam heat insulating portion 34, and the orthogonal beam heat insulating portion 36 are configured by separate flat plate members. In this embodiment, what consists of a phenol resin foam is employ | adopted as each heat insulation part, and Neomafoam (trademark) is specifically used. Thus, each heat insulation part is formed with airtightness. Moreover, the joint of each heat insulation part is block | closed by sticking an airtight tape ranging from one heat insulation part to the other heat insulation part. Moreover, it is also possible to employ | adopt polyethylene foam (PE) instead of the said phenol resin foam as each heat insulation part.

  The beam-side heat insulating portion 31 is provided so as to be in contact with the indoor end faces of the upper flange 15a and the lower flange of the steel beam 15, and from the indoor end face of the upper flange 15a to the indoor end face of the lower flange 15b. It extends vertically. The floor-side heat insulating portion 32 extends horizontally toward the indoor side so as to cover the lower surface of the floor slab 16 from the end surface on the indoor side of the upper flange 15a of the steel beam 15. The outer wall heat insulating portion 33 extends in the vertical direction so as to cover substantially the entire area of the side surface on the indoor side of the outer wall 12 of the floor immediately below the floor slab 16. An upper end small edge surface 33a of the outer wall heat insulating portion 33 is spaced from the lower surface of the lower flange 15b of the steel beam 15 by a gap about the thickness of the lower beam heat insulating portion 34. Between the upper end portion of the beam-side heat insulating portion 31 and the end portion of the upper flange 15a, an adhesive member (double-sided tape) 46 having airtightness is attached.

  The under-beam heat insulating portion 34 is formed in a flat plate shape wider than the width of the steel beam 15. The outer wall side edge of the under-beam heat insulating part 34 extends to the outer wall side from the end of the lower flange 15b of the steel beam 15 to the outer wall side, and the indoor side edge is the indoor side of the lower flange 15b of the steel beam 15 It extends to the indoor side from the end of the. The indoor side edge part protrudes to the indoor side from the end of the lower flange 15b to the extent that the beam-side heat insulating part 31 can be placed. The under-beam heat insulating portion 34 is provided in a state in which the lower surface 34 c of the outer wall side fore edge portion is in contact with the upper end fore edge surface 33 a of the outer wall heat insulating portion 33. The under-beam heat insulating portion 34 is provided in a state where the upper surface 34 d of the indoor side small edge portion is in contact with the lower end small edge surface 31 a of the beam side heat insulating portion 31. According to this, the upper surface 34 d of the under-beam heat insulating portion 34 receives the lower end facet 31 a of the beam-side heat insulating portion 31.

  The steel beam 15 is provided with a support bracket 17 that supports the outer wall 12 and a fixture 40 that fixes the support bracket 17 to the steel beam 15. As shown in FIG. 4, the fixture 40 includes a bolt 41 and a nut 42, and fastens a portion where the support bracket 17 and the lower flange 15 b of the steel beam 15 are overlapped. The fixture 40 has a protruding portion 43 that protrudes from the lower surface of the steel beam 15. The projecting portion 43 includes a portion of the bolt 41 that projects downward from the support fitting 17 and the lower flange 15 b, and a nut 42.

  In the example illustrated in FIG. 4A, the under-beam heat insulating portion 34 has a thickness t <b> 1 that is at least larger than the protruding length D <b> 1 of the protruding portion 43. The under-beam heat insulating portion 34 is provided below the lower surface of the steel beam 15 in a state of being pierced by the protruding portion 43. The under-beam heat insulating portion 34 is crushed by the portion of the protruding portion 43 and supported by the portion where the protruding portion 43 is inserted. Since the thickness t1 of the under-beam heat insulating portion 34 is larger than the protruding length D1 of the protruding portion 43, the tip of the protruding portion 43 is prevented from penetrating the under-beam insulating portion 34.

  In the example shown in FIG. 4B, the under-beam heat insulating portion 34 has a bulging property that allows bulging due to the press-fitting of the protruding portion 43. The under-beam heat insulating portion 34 is provided below the lower surface of the steel beam 15 in a state of being pierced by the protruding portion 43. The under-beam heat insulating portion 34 is crushed by the portion of the protruding portion 43, and the portion where the protruding portion 43 is inserted further bulges. Further, the protrusion 43 is supported by the inserted portion. Since the under-beam heat insulating portion 34 swells at the portion where the protruding portion 43 is inserted, the tip of the protruding portion 43 is prevented from penetrating the under-beam heat insulating portion 34. Although the thickness t1 of the under-beam heat insulating portion 34 is not particularly limited, even if the thickness t1 is approximately the same as the protruding length D1 of the protruding portion 43, penetration is prevented.

  2 and 3, the orthogonal beam heat insulating portion 36 is formed in a flat plate shape disposed between the upper flange 25 a and the lower flange 25 b of the orthogonal beam 25. The upper end facet 36c of the orthogonal beam heat insulating portion 36 is in contact with the upper flange 25a, and the lower end facet 36d is in contact with the lower flange 25b. The orthogonal beam heat insulating portion 36 extends from the end surface on the outer wall side of the orthogonal beam 25 toward the indoor side, and extends at least to the indoor side from the floor side heat insulating portion 32. One flat plate surface 36a of the orthogonal beam heat insulating portion 36 is in contact with the web 25c, and the other flat plate surface 36b substantially coincides with the end portions of the upper flange 25a and the lower flange 25b. In the portion where the orthogonal beam 25 is joined to the steel beam 15, the floor side heat insulating portion 32 and the beam side heat insulating portion 31, that is, the end portion 50 a of the beam floor heat insulating member 50 abuts on the flat plate surface 36 b of the orthogonal beam heat insulating portion 36. ing. The under-beam heat insulating portion 34 straddles the lower surface of the orthogonal beam 25. However, the under-beam heat insulating portion 34 is cut in a column portion (not shown) according to the shape of the column.

  Next, the beam floor heat insulating member 50 that includes the beam side heat insulating portion 31 and the floor side heat insulating portion 32 and covers the steel beam 15 and the lower surface of the floor slab 16 at the same time will be described. The beam floor heat insulating member 50 includes a beam side heat insulating portion 31 and a floor side heat insulating portion 32, and the beam side heat insulating portion 31 and the floor side heat insulating portion 32 are arranged between one flat surface 31 b and 32 b of each other. Are connected by a flexible sheet-like connecting member 51. The other flat plate surfaces 31c and 32c are covered with a sheet 52 cut at the gap SP. Such a beam floor heat insulating member 50 is a plate formed by sandwiching an airtight heat insulating layer (corresponding to the heat insulating portions 31 and 32) made of phenol foam between a pair of sheet layers (corresponding to the connecting material 51 and the sheet 52, respectively). It is formed by making an incision from one sheet layer (sheet 52) to the airtight heat insulating layer. As a result, the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are formed by the airtight heat insulating layer, respectively, and the connecting member 51 is formed by the other sheet layer that is not cut.

  In the example shown in FIG. 5A, in the state where one of the flat plate surfaces 31b and 32b is on the same plane, there is a gap between the small edge surface 31d of the beam-side heat insulating portion 31 and the small edge surface 32d of the floor-side heat insulating portion 32. Opposite with SP. The facet surface 31d and the facet surface 32d face each other so as to be parallel. The size D2 of the gap SP is set to be the same as or slightly smaller than one of the height t2 of the small edge surface 31d of the beam-side heat insulating portion 31 and the height t3 of the small edge surface 32d of the floor-side heat insulating portion 32. When the size D2 of the gap SP is set in accordance with the height t2 of the small edge surface 31d of the beam-side heat insulating portion 31, the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are folded as shown in FIG. As a result, the small edge portion of the beam-side heat insulating portion 31 (one heat insulating portion) is fitted into the gap SP. Further, the other flat plate surface 31c in the small edge portion of the beam side heat insulating portion 31 (one heat insulating portion) is in close contact with the small edge surface 32d of the floor side heat insulating portion 32 (the other heat insulating portion). In addition, the small end surface 31d of the beam-side heat insulating portion 31 (one heat insulating portion) is in close contact with the connecting member 51 exposed through the gap SP. In this state, the beam floor heat insulating member 50 covers the side surface of the steel beam 15 with the beam side heat insulating portion 31 and the lower surface of the floor slab 16 with the floor side heat insulating portion 32. When the size D2 of the gap SP is set in accordance with the height t3 of the small-mouth surface 32d of the floor-side heat insulating portion 32, the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are folded, so that the floor SP enters the gap SP. The small edge portion of the side heat insulating portion 32 (one heat insulating portion) is fitted into the gap SP. Further, the other flat plate surface 32c in the small edge portion of the floor side heat insulating portion 32 (one heat insulating portion) is in close contact with the small edge surface 31d of the beam side heat insulating portion 31 (the other heat insulating portion). In addition, the small end surface 32d of the floor-side heat insulating portion 32 (one heat insulating portion) is in close contact with the connecting member 51 exposed through the gap SP. However, when the height t2 of the small face 31d is equal to the height t3 of the small face 32d, the same size is obtained regardless of which the size D2 of the gap SP is set. Any of the opening part and the small edge part of the floor side heat insulating part 32 may be fitted into the gap SP.

  In the example shown in FIG. 5C, the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are inclined small edge surfaces formed in an inclined shape from one flat plate surface 31b, 32b toward the other flat plate surface 31c, 32c. 31e and 32e. In a state where one of the flat plate surfaces 31b and 32b is on the same plane, the inclined fore edge surface 31e of the beam-side heat insulating portion 31 and the inclined fore edge surface 32e of the floor-side heat insulating portion 32 are respectively connected to the respective front end portions 31f and 32f. It is facing in the face-to-face state. As shown in FIG. 5 (d), the beam floor heat insulating member 50 is in a state in which the inclined facets 31e and 32e are in close contact with each other when the beam side heat insulating portion 31 and the floor side heat insulating portion 32 are folded. In this state, the beam floor heat insulating member 50 covers the side surface of the steel beam 15 with the beam side heat insulating portion 31 and the lower surface of the floor slab 16 with the floor side heat insulating portion 32.

  The connecting member 51 has a bent portion 51 a that is bent when the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are folded. In the case of the beam floor heat insulating member 50 shown in FIG. 5A, when the beam side heat insulating portion 31 is folded so as to fit in the gap SP (in the case of FIG. 5B), the small facet 31d of the beam side heat insulating portion 31 is provided. Corresponds to the bent portion 51 a of the connecting member 51. When the floor-side heat insulating portion 32 is folded so as to fit into the gap SP, the position of the small edge surface 32d of the floor-side heat insulating portion 32 corresponds to the bent portion 51a of the connecting member 51. In the case of the beam floor heat insulating member 50 shown in FIG. 5C, the positions of the tip portions 31 f and 32 f correspond to the bent portion 51 a of the connecting member 51. When the beam floor heat insulating member 50 is installed, the position of the bent portion 51a of the connecting member 51 corresponds to a position in contact with the upper end portion of the steel beam 15 (the end portion of the upper flange 15a) (see FIG. 2). On the surface of the connecting member 51, there is provided a sticking member 46 having airtightness for sticking the bent portion 51 a to the upper end portion of the steel beam 15 along at least the bent portion 51 a. Accordingly, as shown in FIG. 2, in the beam floor heat insulating member 50, the bent portion 51 a is in close contact with the upper end portion of the steel beam 15 through the sticking member 46. Thereby, the airtightness between the beam floor heat insulation member 50 and the upper flange 15a of the steel beam 15 is ensured. As shown in FIGS. 2 and 5, the sticking member 46 is only in a portion in contact with the upper end portion of the steel beam 15 in a region near the bent portion 51 a (only a part on the beam-side heat insulating portion 31 side). It only has to be formed. However, it may extend to the floor-side heat insulating portion 32 as shown in FIG.

  Next, the procedure of the heat insulation line formation method which concerns on this embodiment is demonstrated. First, a flat plate-shaped under-beam heat insulating portion 34 that covers the lower surface of the steel beam 15 is temporarily fixed to the lower surface of the steel beam 15 (first step). At this time, the under-beam heat insulating portion 34 is temporarily fixed by inserting the protruding portion 43 of the fixture 40. Next, the flat outer wall heat insulating portion 33 covering the indoor side surface of the outer wall 12 is placed on the indoor side surface of the outer wall 12 in a state where the upper end small edge surface 33a is in contact with the lower surface 34c of the under beam heat insulating portion 34. Provided along (second step). Next, the indoor side of the steel beam 15 in the state where the flat beam-side heat insulating portion 31 covering the side surface on the indoor side of the steel beam 15 is in contact with the upper surface 34d of the lower-side heat insulating portion 34 at the lower end face 31a. (3rd process). In the third step, the floor-side heat insulating portion 32 is provided simultaneously with the beam-side heat insulating portion 31 in order to attach the folded beam floor heat insulating member 50. The beam floor heat insulating member 50 is fixed to the upper flange 15 a of the steel beam 15 via the sticking member 46.

  Or you may form a heat insulation line in the following procedure as another procedure of the heat insulation line formation method. First, a plate-shaped beam-side heat insulating portion 31 that covers the indoor side surface of the steel beam 15 is provided along the indoor side surface of the steel beam 15 (first step). In the first step, the floor-side heat insulating portion 32 is provided simultaneously with the beam-side heat insulating portion 31 in order to attach the folded beam floor heat insulating member 50. The beam floor heat insulating member 50 is fixed to the upper flange 15 a of the steel beam 15 via the sticking member 46. Next, the flat plate-shaped under-beam heat insulating portion 34 covering the lower surface of the steel beam 15 is temporarily fixed to the lower surface of the steel beam 15 with the upper surface 34d in contact with the lower end face 31a of the beam-side heat insulating portion 31. (Second step). Next, the flat outer wall heat insulating portion 33 covering the side surface on the indoor side of the outer wall 12 is aligned along the side surface on the indoor side of the outer wall 12 with its upper end face 33a in contact with the lower surface 34c of the under beam heat insulating portion. (Third step).

  Next, functions and effects of the heat insulating structure 100, the heat insulating method, and the beam floor heat insulating member 50 according to the present embodiment will be described.

  According to the heat insulating structure 100 for a beam according to the present embodiment, the under-heat insulating portion 34 is formed in a flat plate shape, so that simplification as a member is achieved. Further, since the member is installed facing the lower side of the steel beam 15, it may be dropped during construction, but the upper end of the outer wall heat insulating portion 33 is placed on the lower surface 34 c of the outer wall side fore edge portion of the lower beam heat insulating portion 34. The small edge surface 33a comes into contact, and the outer wall side small edge portion of the under-beam heat insulating portion 34 is sandwiched between the outer wall heat insulating portion 33 and the steel beam 15, and the fall is prevented. Thereby, the effort of construction for fall prevention can be reduced. As described above, even when a heat insulation line extending from the outer wall 12 to the steel beam 15 is formed, the number of members can be suppressed as much as possible, thereby reducing the construction labor (construction process) as much as possible.

Moreover, according to the heat insulation structure 100 of a beam concerning this embodiment, the under-beam heat insulation part 34 has thickness t1 larger than the protrusion length D1 of the protrusion part 43 at least, and was stabbed by the said protrusion part 43 In the state, it is provided below the lower surface of the steel beam 15 (see FIG. 4A). According to this, the under-beam heat insulating part 34 is temporarily fixed by being pierced by the protruding part 43 of the fixture 40. As a result, it is possible to reduce the time and labor required to hold the under-beam heat insulating portion 34 in a state of facing the lower surface of the steel beam 15 (or to further reduce the frequency of dropping of the member during construction). ). Further, since the thickness t1 of the under-beam heat insulating portion 34 is formed larger than the protruding length D1 of the protruding portion 43 of the fixture 40, the under-beam heat insulating portion 34 is pierced into the protruding portion 43 of the fixture 40. Even so, there is no possibility that the fixture 40 penetrates the under-beam heat insulating portion 34, thereby preventing breakage of the heat insulating line accompanying such construction. Further, since the fixture 40 is provided in the beam installation space between the heat insulation line forming portion 30 and the outer wall 12, it cools in contact with the air in the space, but by avoiding the breakage of the heat insulation line as described above. The contact between the cooled fixture 40 and the indoor air is avoided, and the occurrence of condensation due to these contacts is prevented.

  Further, in the heat insulating structure 100 of the beam according to the present embodiment, the under-beam heat insulating portion 34 has a bulging property that allows bulging due to the press-fitting of the protruding portion 43, and is pierced by the protruding portion 43. In the state, it is provided below the lower surface of the steel beam 15 (see FIG. 4B). According to this, the under-beam heat insulating part 34 is temporarily fixed by being pierced by the protruding part 43 of the fixture 40, and thereby the under-beam heat insulating part 34 is opposed to the lower surface of the steel beam 15. It is possible to reduce the time and labor required for maintaining the held state (or to further reduce the frequency of dropping during construction of the member). Further, since the under-beam heat insulating portion 34 has the bulging property as described above, even if the under-beam heat insulating portion 34 is pierced into the protruding portion 43 of the fixing tool 40, the fixing tool 40 is below the under-beam heat insulating portion 34. There is no possibility of penetrating through, so that breakage of the heat insulation line accompanying such construction can be avoided. Further, since the fixture 40 is provided in the beam installation space between the heat insulation line forming portion 30 and the outer wall 12, it cools in contact with the air in the space, but by avoiding the breakage of the heat insulation line as described above. The contact between the cooled fixture 40 and the indoor air is avoided, and the occurrence of condensation due to these contacts is prevented.

  Moreover, in the heat insulation structure 100 of the beam which concerns on this embodiment, while each heat insulation part 31-36 is formed with airtightness, in the joint of each heat insulation part 31-36, from one heat insulation part to the other An airtight tape (not shown) is attached from the indoor side over the heat insulating portion. Thereby, since the joint between heat insulation parts will be block | closed with an airtight tape, it can match with the heat insulation line formed by connecting a heat insulation part, and an airtight line can be formed.

  Further, in the heat insulation line forming method according to the present embodiment, a step of temporarily fixing the under-beam heat insulating portion 34 to the lower surface of the steel beam 15 (first step), the outer wall heat insulating portion 33, and the upper end edge surface 33a of the lower end heat insulating surface 33a are heat-insulated under the beam. A step of providing along the indoor side surface of the outer wall 12 in a state of being in contact with the lower surface of the portion 34 (second step), the beam-side heat insulating portion 31, and the lower end small end surface 31 a of the upper surface 34 d of the under-beam heat insulating portion 34. By the procedure of a step (third step) provided along the side surface on the indoor side of the steel beam 15 in a state where the steel frame 15 is in contact with the frame, the fore end surface straddling the inner side and the outer side of the heat insulating line formed by these heat insulating portions becomes vertical. The structure to be formed can be formed by a simple construction procedure. In addition, the under-beam heat insulating portion 34 temporarily fixed to the lower surface of the steel beam 15 in the first step is supported by the outer wall heat insulating portion 33 in the subsequent second step (sandwiched between the steel beam 15 and the outer wall heat insulating portion 33). Therefore, the frequency of dropping of the under-beam heat insulating portion 34 in the subsequent construction can be reduced as much as possible.

  In the building heat insulation line forming method according to the present embodiment, the step of providing the beam-side heat insulating portion 31 along the side surface on the indoor side of the steel beam 15 (fourth step), the under-beam heat insulating portion 34, and the upper surface 34d of the beam A step of temporarily fixing to the lower surface of the steel beam 15 in a state of being in contact with the lower end edge surface 31a of the side heat insulating portion 31 (fifth step); The small facet straddling the inner side and the outer side of the heat insulation line formed by these heat insulation parts is made vertical by a procedure of a step (sixth step) provided along the side surface on the indoor side of the outer wall 12 in a state of being in contact with 34c. The structure to be formed can be formed by a simple construction procedure. In addition, the lower end facet 31a of the beam-side heat insulating portion 31 provided on the side surface of the steel beam 15 in the fourth step is connected to the indoor upper surface 34d of the under-beam heat insulating portion 34 temporarily fixed in the subsequent fifth step. By joining, the said under-beam heat insulation part 34 can be supported, and the frequency of the fall of the under-beam heat insulation part 34 in subsequent construction can be lowered as much as possible.

  According to the beam floor heat insulating member 50 and the heat insulating structure 100 using the same shown in FIG. 5A of the present embodiment, the small facets 31d and 32d of either the beam side heat insulating portion 31 or the floor side heat insulating portion 32 are used. Then, the small edge surface of the other heat insulating portion comes into contact with the other flat plate surface of the small edge portion of one heat insulating portion. As a result, the beam floor heat insulating member 50 has a bent shape as shown in FIG. By contacting the side wall of the steel beam 15 and the lower surface of the floor slab 16 with the beam floor heat insulating member 50 having such a bent shape, the floor slab 16 is formed from the steel beam 15 which is formed into a corner shape and is difficult to perform heat insulation. The heat insulation construction of the portion that switches to the lower surface of can be easily performed with one heat insulating member. Further, as described above, the small edge surfaces 31d and 32d are abutted with each other to form a fold portion, and the both heat insulating portions 31 and 32 are folded along the fold portion so that the small edge portions of the both heat insulating portions 31 and 32 are formed. Since the butt | matched state is formed, the said folding part is ensuring the heat insulation property comparable as a flat plate part. As described above, even when heat insulation is performed over the steel beam 15 and the lower surface of the floor slab 16, it is possible to reduce the number of members and reduce the order of construction while ensuring heat insulation.

  In the beam floor heat insulating member 50 and the heat insulating structure 100 using the same shown in FIG. 5C of the present embodiment, the beam-side heat insulating portion 31 and the inclined edge surfaces 31e and 32e of the floor side heat insulating portion 32 are brought into contact with each other. Thus, as shown in FIG. 5 (d), the beam floor heat insulating member 50 is bent. Then, the beam floor heat insulating member 50 having the broken shape is brought into contact with the side surface of the steel beam 15 and the lower surface of the floor slab 16, so that the floor slab 16 is formed from the steel beam that is formed into a corner shape and is difficult to perform heat insulation. The heat insulation work of the part switched to a lower surface can be easily performed with one heat insulation member. Further, as described above, the beveled portions are formed by abutting the inclined fore edge surfaces 31e and 32e, and the both end portions of the heat insulating portions 31 and 32 are formed by folding the heat insulating portions 31 and 32 along the bent portion. Therefore, the folded portion is ensured to have the same thermal insulation as the flat plate portion. As described above, even when heat insulation is performed over the steel beam 15 and the lower surface of the floor slab 16, it is possible to reduce the number of members and reduce the order of construction while ensuring heat insulation.

  In the beam floor heat insulating member 50 according to the present embodiment, a cut is made from one sheet layer of a plate-shaped heat insulating plate formed by sandwiching an airtight heat insulating layer made of phenol foam between a pair of sheet layers to the airtight heat insulating layer. Thus, the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 are formed by the airtight heat insulating layer, respectively, and the connecting member 51 is formed by the other sheet layer that is not cut. According to this, the beam floor heat insulating member 50 can be easily formed by making a cut without cutting one sheet layer of the flat heat insulating plate.

  In the beam floor heat insulating member 50 and the heat insulating structure 100 using the same according to the present embodiment, the connecting member 51 includes a bent portion 51a that is bent when the beam side heat insulating portion 31 and the floor side heat insulating portion 32 are folded. On the surface of the connecting member 51, there is provided a sticking member 46 having airtightness for sticking the bent portion 51 a to the upper end portion of the steel beam 15 along at least the bent portion 51 a. In the folded beam floor heat insulating member 50, the bent portion 51 a is in close contact with the upper end portion of the steel beam 15 through the sticking member 46. According to this, the bent portion 51 a is attached to the upper end portion of the steel beam 15, and accordingly, the floor-side heat insulating portion 32 abuts on the lower surface of the floor slab 16 and the beam-side heat insulating portion 31 also runs along the side surface of the steel beam 15. Thus, the installation of the beam floor heat insulating member 50 is remarkably easy. In addition, since the beam floor heat insulating member 50 is attached to the beam via the sticking member 46, the operator can perform work by releasing his / her hand from the beam floor heat insulating material 50. It is possible to improve the workability of the entire construction. Further, since the sticking member 46 has airtightness, airtightness in the vicinity of the folded portion 51a where the facets contact or face each other is also ensured.

  The present invention is not limited to the embodiment described above. For example, the configurations of the outer wall 12 and the structural housing 11 may be changed as appropriate within the scope of the present invention. Accordingly, the material, thickness, and shape of each heat insulating part may be changed.

  For example, as a modification of the beam floor heat insulating member 50, a configuration as shown in FIG. 6 may be adopted. In the beam floor heat insulating member 50 shown in FIG. 6A, the connecting member 51 is provided only in the vicinity of the gap SP. That is, the flat plate surfaces 31b and 32b of the beam-side heat insulating portion 31 are exposed without being covered with the sheet material, and the edges of the flat plate surfaces 31b and 32b in the vicinity of the gap SP are only in the gap SP where the small edge surfaces 31d and 32d face each other. A connecting member 51 is attached to the part. In the beam floor heat insulating member 50 shown in FIG. 6B, the heights of the small edge surfaces 31d and 32d of the heat insulating portions 31 and 32 are different. The size D2 of the gap SP is formed so as to correspond to the height of one of the facets 31d and 32d. The beam floor heat insulating member 50 shown in FIG. 6 (c) has small facets 31d and 32d formed in parallel from one flat face 31b and 32b to the other flat face 31c and 32c. 32e is formed. The inclined fore edge surface 31e and the inclined fore edge surface 32e are opposed to each other in a state where the respective front end portions 31f and 32f are abutted with each other. When the beam floor heat insulating member 50 is bent, the inclined facets 31e and 32e come into contact with each other.

  For example, you may apply the heat insulation structure 200 which concerns on the modification of this invention with respect to a building as shown in FIG. In the building shown in FIG. 7, the floor slab 16 is attached not to the upper surface of the steel beam 15 but to a mounting bracket 72 connected to the steel beam 15. The mounting bracket 72 is an L-shaped member, and is supported by the steel beam 15 via a bracket 71 fixed to the web 15 c of the steel beam 15. As described above, the bracket 71 and the mounting bracket 72 protrude from the side surface of the steel beam 15. In the heat insulating structure 200, the beam side heat insulating portion 31 and the floor side heat insulating portion 32 of the beam floor heat insulating member 50 are bent at an angle larger than a right angle. That is, the beam-side heat insulating portion 31 extends upward from the end of the lower flange 15 b so as to incline indoors, and extends to the lower surface of the floor slab 16 so as to avoid the bracket 71 and the mounting bracket 72. The bent portion 51 a of the beam floor heat insulating member 50 is stuck to the edge of the mounting bracket 72 via the sticking member 46. Such an angle adjustment between the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 can be performed, for example, by adjusting an angle AG between the inclined small edge surface 31e and the inclined small edge surface 32e of the gap SP (see FIG. 5 (c)).

  In the present invention, the beam-side heat insulating portion 31 and the floor-side heat insulating portion 32 may use the beam floor heat insulating member connected by the connecting member 51, and the upper and lower surfaces and the small openings of the small portions of each heat insulating portion. The contact pattern between the surfaces is not limited to the above.

  DESCRIPTION OF SYMBOLS 12 ... Outer wall, 15, 25 ... Steel beam, 16 ... Floor slab, 17 ... Support metal fitting, 30 ... Heat insulation line formation part, 31 ... Beam side heat insulation part, 32 ... Floor side heat insulation part, 33 ... Outer wall heat insulation part, 34 ... Insulation under the beam, 36 ... orthogonal beam insulation, 40 ... fixture, 43 ... protrusion, 46 ... sticking member, 50 ... beam floor insulation, 51 ... connecting material, 100, 200 ... insulation structure.

Claims (2)

Floor slabs,
A steel beam supporting the floor slab;
A building having a heat insulation line extending from the outer wall to the lower surface of the steel beam and the side surface on the indoor side with respect to a building having an outer wall supported by the steel beam facing the side surface on the outdoor side of the steel beam A heat insulation line forming method,
A first step of temporarily fixing to the lower surface of the steel beam by sticking a flat plate-shaped under-beam heat insulating portion covering the lower surface of the steel beam into a protruding portion protruding from the lower surface of the steel beam;
A flat outer wall heat insulating portion that covers the indoor side surface of the outer wall is provided along the indoor side surface of the outer wall in a state in which an upper end edge surface is in contact with the lower surface of the under-beam heat insulating portion. Process,
A plate-shaped beam-side heat insulating portion that covers the indoor side surface of the steel beam is provided along the indoor side surface of the steel beam with its lower end small face being in contact with the upper surface of the under-beam heat insulating portion. A heat insulation line forming method for a building, comprising: a third step. Floor slabs,
A steel beam supporting the floor slab;
A building having a heat insulation line extending from the outer wall to the lower surface of the steel beam and the side surface on the indoor side with respect to a building having an outer wall supported by the steel beam facing the side surface on the outdoor side of the steel beam A heat insulation line forming method,
A first step of providing a plate-like beam-side heat insulating portion covering the indoor side surface of the steel beam along the indoor side surface of the steel beam;
The plate-shaped under-beam heat insulating portion that covers the lower surface of the steel beam is stabbed into a protruding portion that protrudes from the lower surface of the steel beam with its upper surface in contact with the lower edge of the beam-side heat insulating portion. A second step of temporarily fixing the lower surface of the steel beam;
A flat plate-like outer wall heat insulating portion that covers the indoor side surface of the outer wall is provided along the indoor side surface of the outer wall in a state where the upper end edge surface is in contact with the lower surface of the under-beam heat insulating portion. And a heat insulation line forming method for a building.

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