JP5965324B2 - Thermal insulation structure of building - Google Patents

Description

  The present invention relates to a heat insulating structure of a building.

  In buildings such as houses, outer peripheral beams are provided along the outer periphery of the building. In many cases, the outer peripheral beam is made of a shape steel. Among them, an H-section steel having particularly excellent cross-sectional efficiency is often used (see, for example, Patent Document 1). When the outer beam is made of H-shaped steel, the outer beam is placed on the outer periphery of the building with the web facing up and down, in other words, with the grooves on both sides facing the web facing the indoor side and the outdoor side, respectively. Is done.

  By the way, the outer circumferential beam is likely to become a thermal bridge because it is arranged on the outer circumferential portion of the building. Thus, a heat insulating structure is known in which a heat insulating material is provided on the outdoor side of the outer peripheral beam along the outer peripheral beam to suppress the outer peripheral beam from becoming a thermal bridge. In this type of heat insulating structure, a plate-shaped heat insulating material made of a foam heat insulating material (hard heat insulating material) having excellent heat insulating performance is generally used as a heat insulating material. Here, when the heat insulating material applied to the outer peripheral beam made of H-shaped steel is provided from the outdoor side, the heat insulating material may be provided across the upper and lower flanges so as to close the opening of the groove portion on the outer side in the outer peripheral beam. Conceivable. In this case, in the outer circumferential beam made of H-shaped steel, the entire vertical height including the upper and lower flanges can be covered with the heat insulating material from the outdoor side, and the outer circumferential beam can be prevented from becoming a thermal bridge.

JP 2011-127295 A

  By the way, in a building such as a house, a balcony may be provided so as to project outward from the building body. In such a cantilever (cantilever) type balcony, a support beam for supporting the floor from below is provided below the balcony floor. The support beam is connected to the outer peripheral beam and is provided so as to extend from the outer peripheral beam to the outdoor side.

  Here, in such a configuration, when the heat insulating material is provided along the outer peripheral beam on the outdoor side of the outer peripheral beam, the heat insulating material cannot be provided at the connection portion where the support beam is connected to the outer side of the outer peripheral beam. . Therefore, in such a configuration, it is necessary to divide and arrange the heat insulating material at the connection site. However, in that case, since a heat insulation defect occurs at the connection part, there is a concern that the outer peripheral beam becomes a thermal bridge at the connection part, and there is a concern about a decrease in heat insulation performance.

  This invention is made | formed in view of the said situation, and it aims at providing the heat insulation structure of the building which can suppress the fall of heat insulation performance by suppressing that an outer periphery beam becomes a thermal bridge. It is what.

  In order to solve the above problems, a heat insulating structure for a building according to a first aspect of the present invention comprises a steel having a web and a pair of flanges provided on both sides of the web, and is surrounded by the web and the flanges. An outer peripheral beam provided along the outer periphery of the building with the groove portion facing the outdoor side, a cross beam connected to the outdoor side of the outer peripheral beam and extending in a direction intersecting the outer peripheral beam, and a foam-based heat insulating material And an outer peripheral beam heat insulating material provided to extend along the outer peripheral beam so as to cover the entire vertical height of the outer peripheral beam on the outdoor side of the outer peripheral beam, and divided by the cross beam. In the outer peripheral beam, a heat insulating material in the beam is disposed in the groove portion at a connecting portion with the cross beam.

  According to the present invention, the outer peripheral beam heat insulating material provided along the outer peripheral beam on the outdoor side of the outer peripheral beam is divided by the cross beam connected to the outer side of the outer peripheral beam. Since the in-beam heat insulating material is disposed in the groove portion at the connection portion with the beam, it is suppressed that the outer peripheral beam becomes a thermal bridge at the connection portion. Thereby, the fall of heat insulation performance can be suppressed.

  In the heat insulation structure for a building of the second invention, in the first invention, the in-beam heat insulating material is provided in a state where a part of the heat insulating material enters between the outer peripheral beam heat insulating material and the web in the groove portion. It is characterized by.

  According to the present invention, in the groove portion of the outer peripheral beam, a part of the heat insulating material in the beam enters between the outer peripheral beam heat insulating material and the web of the outer peripheral beam. In this case, since the in-beam heat insulating material and the outer peripheral beam heat insulating material can be provided continuously in the longitudinal direction of the outer peripheral beam, the effect of suppressing a decrease in heat insulating performance can be enhanced.

  Here, it is preferable that the in-beam heat insulating material and the outer peripheral beam heat insulating material are arranged in contact with each other. If it does so, since the continuous heat insulation line can be formed with the heat insulating material in a beam and an outer periphery beam heat insulating material, the effect which suppresses the fall of heat insulation performance can be heightened further.

  In the heat insulation structure of a building of a third invention, in the first or second invention, the cross beam is made of a shape steel having a web and a pair of flanges provided on both sides of the web, The groove surrounded by each flange is provided in a state of being directed to the side, and the heat insulating material in the beam is formed in the groove portion of the outer peripheral beam and the groove portion of the intersecting beam at the connection portion of the outer peripheral beam. It is characterized by being disposed across.

  According to the present invention, since the heat insulating material in the beam is disposed across the groove portion of the outer peripheral beam and the groove portion of the cross beam at the connection portion of the outer peripheral beam, the length of the heat insulating material in the beam in the indoor / outdoor direction is increased. In other words, the thickness of the heat insulating material in the beam can be increased. Thereby, the fall of heat insulation performance can be suppressed further.

  According to a fourth aspect of the present invention, there is provided the heat insulating structure for a building according to the third aspect, wherein the heat insulating material in the beam is a first heat insulating portion disposed in a groove portion of the connecting portion of the outer peripheral beam, and the first heat insulating portion. A second heat insulating portion extending along the groove from the outer peripheral beam heat insulating material and the web, and a third heat insulating portion extending from the first heat insulating portion to the outdoor side and into the groove of the cross beam. It is characterized by having an L shape.

  According to the present invention, the heat insulating material in the beam has an L shape, and a part thereof (second heat insulating portion) enters between the outer peripheral beam heat insulating material and the web of the outer peripheral beam in the groove portion of the outer peripheral beam. In addition, a part (third heat insulating portion) thereof enters the groove portion of the cross beam. In this case, the effects of the second invention and the effects of the third invention can be obtained all at once, and the deterioration of the heat insulation performance can be greatly suppressed.

  The heat insulating structure for a building of a fifth invention is the heat insulating structure of the third or fourth invention, wherein the cross beams are made of H-section steel having the groove portions opened to the sides on both sides of the web. The heat insulating material in the beam is provided for each groove portion of the cross beam, and each of the heat insulating materials in the beam and the groove portion of the outer peripheral beam at the connection portion of the outer peripheral beam and the cross beam. It is characterized by being disposed across the groove portion.

  According to the present invention, in the configuration in which the cross beams are made of H-shaped steel having groove portions on both sides of the web, the in-beam heat insulating materials are provided for the respective groove portions, Is also arranged so as to straddle the groove portion of the outer peripheral beam and the groove portion of the cross beam. Thereby, even when a cross beam consists of H-section steel, the effect of the said 3rd invention can be acquired suitably.

  The heat insulating structure for a building of the sixth invention is characterized in that, in any one of the first to fifth inventions, the in-beam heat insulating material is formed of a fiber heat insulating material.

  According to the present invention, since the in-beam heat insulating material is formed of a flexible fiber-based heat insulating material, it can be easily disposed in a state in which the groove portion of the outer peripheral beam is filled with the in-beam heat insulating material. Therefore, it is convenient to improve the heat insulating performance by filling the groove with the in-beam heat insulating material.

  In addition, when the present invention is applied to the fifth invention, it is possible to easily make an L-shape by bending the heat insulating material in the beam, and to change the heat insulating material in the beam between the groove portion of the outer peripheral beam and the cross beam. It is possible to easily fill both the groove portion and the groove portion.

  A heat insulating structure for a building according to a seventh invention is the heat insulating structure for a building according to any one of the first to sixth inventions, wherein a plurality of the outer peripheral beams are provided side by side along the outer periphery of the building, and the cross beams are adjacent to the outer periphery. It is connected with at least one of these each outer periphery beam in the boundary part of a beam, The said heat insulating material in a beam is arrange | positioned ranging over the said groove part of each these outer periphery beam, It is characterized by the above-mentioned.

  According to the present invention, since the in-beam heat insulating material is provided across the groove portion of each adjacent outer peripheral beam, the gap generated between each of the outer peripheral beams can be blocked from the outdoor side by the in-beam heat insulating material. it can. Thereby, the entry / exit of air through the gap, and hence the entry / exit of heat accompanying the entry / exit of the air can be suppressed, and the heat insulation performance can be improved.

  A heat insulating structure for a building of an eighth invention is applied to a building including any one of the first to seventh inventions, the building main body and an overhanging portion provided to protrude from the building main body to the outdoor side, The outer peripheral beam is provided along an outer peripheral portion of the building body, and the projecting portion includes a plurality of support beams as the cross beams connected to the outer peripheral beam. Each of the support beams is divided by each of the support beams, and the in-beam heat insulating material is provided for each connection portion of the outer peripheral beam with the support beams.

  In a building in which a projecting portion is provided by projecting from the building body to the outdoor side, the projecting portion may be supported by a plurality of support beams connected to the outdoor side of the outer peripheral beam of the building body. In such a configuration, since the outer peripheral beam heat insulating material is divided by the plurality of support beams, the heat insulating performance is likely to be deteriorated. In this regard, according to the present invention, since the in-beam heat insulating material is provided for each connection portion of the outer peripheral beam with each support beam, it is possible to suppress a decrease in heat insulating performance even in such a configuration.

The schematic perspective view which shows the whole building. Sectional drawing which shows the structure around the floor part of a balcony. The top view which shows a balcony. The connection part of the outer periphery beam and the balcony floor beam in the area | region C1 of FIG. 3 is shown, (a) is a disassembled perspective view which shows the structure of the said connection part, (b) is a top view. The connection part of the outer periphery beam and the balcony floor beam in area | region C2 of FIG. 3 is shown, (a) is a disassembled perspective view which shows the structure of the said connection part, (b) is a top view. The heat insulation structure of the outer periphery beam in area | region C1 of FIG. 3 is shown, (a) is a perspective view which shows the structure, (b) is a top view. The heat insulation structure of the outer periphery beam in area | region C2 of FIG. 3 is shown, (a) is a perspective view which shows the structure, (b) is a top view.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing the entire building.

  As shown in FIG. 1, the building 10 includes a building body 12 disposed on the foundation 11 and a roof 13 disposed above the building body 12. The building body 12 is a two-story building having a first floor part 15 and a second floor part 16.

  On the second floor portion 16 of the building main body 12, a cantilever balcony 20 (hereinafter referred to as a balcony 20) is provided so as to protrude from the building main body 12 to the outdoor side. The balcony 20 is provided on one side surface of the building body 12 from the end in the width direction (the corner of the building body 12) to the middle. Here, the balcony 20 corresponds to the overhanging portion.

  Next, the configuration of the balcony 20 and its surroundings will be described with reference to FIGS. FIG. 2 is a cross-sectional view showing a configuration around the floor portion of the balcony 20, and FIG. 3 is a plan view showing the balcony 20.

  As shown in FIG. 2, in the outer peripheral portion of the building body 12, the first floor portion 15 is provided with an outer wall portion 24 that partitions the first floor room 21 from the outside. In the outer wall 24, an outer wall panel 25 is provided on the outdoor side, and an inner wall surface material 26 is provided on the indoor side. The outer wall panel 25 has an outer wall surface material 27 and an outer wall frame 28 provided on the back side thereof. Glass wool 29 is provided between the outer wall panel 25 and the inner wall surface material 26, and rock wool 33 is provided above the glass wool 29. In addition, the code | symbol 41 in FIG. 2 is a ceiling surface material of the one-story room 21. FIG.

  In the outer peripheral portion of the building body 12, an outer wall portion 34 that partitions the second-floor room 22 from the balcony 20 is provided on the second-floor portion 16. In the outer wall portion 34, an outer wall panel 35 is provided on the outdoor side, and an inner wall surface material 36 is provided on the indoor side. The outer wall panel 35 has an outer wall surface material 37 provided facing the balcony 20 and an outer wall frame 38 provided on the back side thereof. Glass wool 39 is provided between the outer wall panel 35 and the inner wall surface material 36, and a waterproof base material 46 is provided below the outer wall surface material 37 along its lower end.

  Below the outer wall 34, the floor of the second-floor room 22 is provided. The floor portion includes two floor base materials 43 and 44 supported by an outer peripheral beam 30 to be described later, and a floor finishing material (not shown) laid on the floor base materials 43 and 44. The floor base material 43 is made of an ALC floor, and the floor base material 44 is made of a particle board. The floor base material 44 extends to the outdoor side of the floor base material 43, and a rock wool 45 is provided below the extended portion. The rock wool 45 is arranged side by side with the glass wool 39, and the rock wool 33 and the glass wool 29 on the first floor portion 15 are also arranged vertically.

  As shown in FIG. 2 and FIG. 3, in the outer peripheral portion of the building body 12, the interstage portion 17 between the first floor portion 15 and the second floor portion 16 is provided with an outer peripheral beam 30 extending along the outer peripheral portion. Yes. A plurality of peripheral beams 30 are provided side by side along the outer peripheral portion of the building body 12. The outer circumferential beam 30 is made of H-shaped steel and includes a web 30a extending in the vertical direction and a pair of flanges 30b and 30c provided at both upper and lower ends of the web 30a. In the outer circumferential beam 30, groove portions 31 surrounded by the web 30a and the flanges 30b and 30c are formed on both sides of the web 30a. The outer peripheral beam 30 is disposed with the respective groove portions 31 facing the outdoor side and the indoor side, respectively. In the following description, for convenience of explanation, a is assigned to the sign of the outdoor groove 31, and b is assigned to the sign of the indoor groove 31.

  Next, the balcony 20 will be described.

  The balcony 20 includes a balcony floor 51 and a balcony waist wall 52 erected along the periphery of the balcony floor 51. The balcony floor 51 includes a plurality of balcony floor beams 54 that extend from the outer circumferential beam 30 toward the outdoor side, and a balcony connection beam 55 that connects the ends of the balcony floor beams 54 on the outdoor side. Both the balcony floor beam 54 and the balcony connecting beam 55 are made of H-shaped steel, and are connected to each other via a connection fitting or the like (not shown). Here, the balcony floor beam 54 corresponds to a support beam and a cross beam.

  The balcony floor beam 54 is provided in a direction orthogonal to the outer circumferential beam 30, and one end thereof is coupled to the outer circumferential beam 30 and the other end is coupled to the balcony coupling beam 55. The balcony floor beam 54 includes a web 54a extending in the vertical direction and a pair of flanges 54b and 54c provided at both upper and lower ends of the web 54a. In the balcony floor beam 54, grooves 56 surrounded by the web 54a and the flanges 54b are formed on both sides of the web 54a, respectively, and the balcony floor beam 54 has the grooves 56 directed to the sides. (See also FIG. 4). In this embodiment, both the balcony floor beam 54 and the outer peripheral beam 30 are formed of H-shaped steel having the same cross section.

  A plurality of (specifically three) balcony floor beams 54 are provided at predetermined intervals in the longitudinal direction of the outer peripheral beam 30 (in other words, the lateral width direction of the balcony 20). Specifically, the balcony floor beams 54 are respectively disposed at both ends and the center of the balcony 20 in the width direction. In the following description, A, B, and C are given to the reference numerals in order from the left side to the right side in FIG. That is, among the balcony floor beams 54 </ b> A to 54 </ b> C, the balcony floor beams 54 </ b> A and 54 </ b> B extend from the straight portion (non-exit corner portion) of the building body 12 to the outdoor side. It extends from the section to the outdoor side.

  In the balcony floor 51, a floor base material 58 is provided across the balcony floor beams 54 and the balcony connecting beams 55, and a floor heat insulating material 59 is laid on the floor base material 58. Yes. The floor base material 58 is made of an ALC floor, and the floor heat insulating material 59 is made of a foamed polystyrene resin. A waterproof plate (not shown) is laid on the floor heat insulating material 59, and the floor surface of the balcony floor 51 is formed by the waterproof plate. A part of the waterproof plate is raised along the outdoor side surface of the waterproof base material 46.

  The balcony waist wall portion 52 includes a plurality of waist wall columns 61 erected at predetermined intervals in the wall width direction, and a pair of wall surface materials 62 and 63 provided on both sides of the waist wall columns 61. The waist wall support 61 is connected to the balcony connection beam 55 via a connection fitting (not shown).

  Below each balcony floor beam 54 and balcony connecting beam 55, an eaves top plate 65 is provided. The eaves top plate 65 is supported by the beams 54 and 55 via a base material 66. Further, a connecting material 67 that connects the eaves top plate 65 and the wall surface material 62 of the balcony waist wall 52 is provided at the lower end of the balcony waist wall 52.

  Next, the structure of the connection part with the balcony floor beam 54 in the outer periphery beam 30 is demonstrated. Here, among the connecting portions of the outer peripheral beam 30 with the balcony floor beams 54A to 54A, the connecting portion with the balcony floor beam 54A (in the region C1 in FIG. 3) and the connecting portion with the balcony floor beam 54C (FIG. 3). In the region C2). 4A and 4B show a connection portion of the outer peripheral beam 30 with the balcony floor beam 54A. FIG. 4A is an exploded perspective view showing a configuration of the connection portion, and FIG. 4B is a plan view. 5A and 5B show a connection portion of the outer peripheral beam 30 with the balcony floor beam 54C, in which FIG. 5A is an exploded perspective view showing a configuration of the connection portion, and FIG. 5B is a plan view.

  As shown in FIGS. 4A and 4B, the outer peripheral beams 30 adjacent to each other in the outer peripheral direction of the building are connected to each other through the connecting metal 71 at the connecting portion of the outer peripheral beam 30 with the balcony floor beam 54 </ b> A. . Of these outer peripheral beams 30, one outer peripheral beam 30 (hereinafter referred to as outer peripheral beam 30A) is provided with a flat plate-like fixing plate 72 in the groove 31a. The fixing plate 72 is provided in a vertical direction across the flanges 30b and 30c in the vicinity of the boundary between the outer peripheral beam 30A and the other outer peripheral beam 30 (hereinafter referred to as the outer peripheral beam 30B). It is fixed to 30c by welding.

  The connection fitting 71 is formed in an L shape from a steel plate and has a pair of plate portions 71a and 71b that are perpendicular to each other. In the connection fitting 71, one plate portion 71a is fixed to the outdoor side surface of the web 30a of the outer peripheral beam 30B by welding, and the other plate portion 71b is fixed to the plate surface of the fixing plate 72 on the outer peripheral beam 30B side by bolts 74. Yes. Thereby, the adjacent outer peripheral beams 30A and 30B are connected to each other via the connection fitting 71 (and the fixing plate 72).

  In detail regarding the fixing of the plate portion 71b, the plate portion 71b is formed with a plurality of insertion holes 75, and the fixing plate 72 is formed with a plurality of insertion holes 76 at positions corresponding to the insertion holes 75. Yes. The bolts 74 are screwed into the insertion holes 76 of the fixed plate 72 through the insertion holes 75 of the plate part 71 b, so that the plate part 71 b is fixed to the fixed plate 72. In FIG. 4A, the insertion holes 75 and 76 are provided at four positions in the upper and lower directions, and the bolts 74 are inserted only at two positions.

  A balcony floor beam 54A is connected to the outdoor side of the outer peripheral beam 30A via a connection fitting 73. In the present embodiment, the connecting fitting 73 has the same configuration as the connecting fitting 71 described above, and the members are shared. In FIG. 4A, the same reference numeral 75 as the insertion hole portion of the connection fitting 71 is attached to the insertion hole portion of the connection fitting 73.

  The balcony floor beam 54A is disposed at the end of the outer peripheral beam 30B on the outdoor side of the outer peripheral beam 30A. Specifically, the web 54a is aligned with the fixing plate 72 of the outer peripheral beam 30A in the longitudinal direction of the outer peripheral beam 30A. Arranged in a state. The connection fitting 73 is provided on the opposite side of the connection fitting 71 with the fixing plate 72 in between, the plate portion 73a is fixed to the web 54a of the balcony floor beam 54A by welding, and the plate portion 73b is fixed to the outer peripheral beam 30A. The web 30a is fixed to the outdoor side surface by bolts 78. Thereby, the balcony floor beam 54 </ b> A and the outer peripheral beam 30 </ b> A are connected via the connection fitting 73. The plate portion 73b is fixed by screwing bolts 78 into the insertion holes (not shown) of the web 30a through the insertion holes 75. In addition, a relief hole 79 through which the bolt 74 is inserted is formed in the plate portion 73a.

  Next, a connection configuration of the outer peripheral beam 30 with the balcony floor beam 54C will be described. As shown in FIGS. 5 (a) and 5 (b), the adjacent outer peripheral beams 30 are arranged at right angles to each other at the projecting corner of the building body 12 (hereinafter, the outer periphery forming a right angle with the outer peripheral beam 30B). The beams are called outer peripheral beams 30 </ b> C), and the outer peripheral beams 30 </ b> B and 30 </ b> C are connected to each other via a connection fitting 85. The connecting fitting 85 has the same configuration as the connecting fitting 71 (73), and its plate portion 85a is welded and fixed to the outdoor side surface of the web 30a of the outer peripheral beam 30C, and its plate portion 85b is the outer peripheral beam 30B. Bolts 87 are fixed to the indoor side of the web 30a.

  A balcony floor beam 54C is connected to the outdoor side of the outer peripheral beam 30B (in other words, the side opposite to the outer peripheral beam 30C across the outer peripheral beam 30B) via a connecting fitting 86. The connecting fitting 86 has the same configuration as the connecting fitting 71 (73) described above, and its plate portion 86a is welded and fixed to the inner surface of the balcony of the web 54a of the balcony floor beam 54C, and the plate portion 86b is arranged on the outer periphery. Bolts 88 are fixed to the outdoor side surface of the web 30a of the beam 30B.

  It should be noted that the connection between the adjacent outer peripheral beams 30 and the connection between the balcony floor beam 54 and the outer peripheral beam 30 are not necessarily performed using the connection fittings 71, 73, 85, 86 as described above. The connection structure is arbitrary, such as connecting directly using a bolt or the like.

  By the way, in the building 10 of this embodiment, the outer periphery beam heat insulating material 70 is provided in the outdoor side of the outer periphery beam 30 in order to suppress that the outer periphery beam 30 becomes a thermal bridge. Hereinafter, the heat insulating structure of the outer peripheral beam 30 having the outer peripheral beam heat insulating material 70 will be described with reference to FIGS. 6 and 7 in addition to FIG. 2. FIG. 6 shows a heat insulating structure around the connecting portion of the outer peripheral beam 30A with the balcony floor beam 54A (that is, the region C1 in FIG. 3), and (a) is a perspective view showing the same structure. ) Is a plan view. FIG. 7 shows a heat insulating structure around the connection portion of the outer peripheral beam 30B with the balcony floor beam 54C (that is, the region C2 in FIG. 3), and (a) is a perspective view showing the structure. ) Is a plan view.

  As shown in FIG. 2, FIG. 6 and FIG. 7, the peripheral beam heat insulating material 70 is formed in a long and plate shape with a foam heat insulating material (hard heat insulating material), for example, formed with urethane foam resin. Has been. The outer peripheral beam heat insulating material 70 is provided so as to extend along the outer peripheral beam 30 on the outdoor side of the outer peripheral beam 30. The outer peripheral beam heat insulating material 70 is provided across the upper and lower flanges 30b and 30c so as to block the opening of the groove portion 31a of the outer peripheral beam 30, and thereby the outer peripheral beam 30 including the flanges 30b and 30c. The entire vertical height is covered with the outer peripheral beam heat insulating material 70 from the outdoor side. As shown in FIG. 7, the outer peripheral beam heat insulating material 70 covering the outer peripheral beam 30 </ b> C from the outdoor side extends to the end in the longitudinal direction of the outer peripheral beam 30 </ b> B at the protruding corner of the building body 12. The said edge part is covered from the outdoor side.

  Although not shown, the outer peripheral beam heat insulating material 70 is sandwiched between a pair of upper and lower sandwiching members respectively provided on the upper surface (specifically, the upper surface of the flange 30b) and the lower surface (specifically, the lower surface of the flange 30c). Is fixed. In this case, the sandwiching member is made of, for example, a flat plate, and is attached to the upper surface and the lower surface of the outer circumferential beam 30 so as to protrude from the upper end portion and the lower end portion of the outer circumferential beam heat insulating material 70, respectively. The fixing structure of the outer peripheral beam heat insulating material 70 is not necessarily limited to this, and the fixing structure such as fixing with an adhesive tape is arbitrary.

  Here, as described above, in the building 10 of the present embodiment, the balcony floor beam 54 is connected to the outdoor side of the outer peripheral beam 30, and therefore, a connection portion (hereinafter referred to as connection) of the outer peripheral beam 30 with the balcony floor beam 54. The outer peripheral beam heat insulating material 70 cannot be disposed at the portion 83). Therefore, as shown in FIG.6 and FIG.7, it is necessary to divide and arrange | position the outer periphery beam heat insulating material 70 in the said connection part 83. As shown in FIG. However, in this case, since a heat insulation defect occurs in the connection part 83, the outer peripheral beam 30 may become a thermal bridge in the connection part 83, and there is a concern about a decrease in heat insulation performance. Therefore, in the present embodiment, in view of this point, a heat insulating material in the beam is provided in the groove portion 31a in the connection portion 83 of the outer peripheral beam 30, thereby suppressing the outer beam 30 from becoming a thermal bridge in the connection portion 83. Like to do. Hereinafter, the characteristic configuration of the present embodiment will be described in detail.

  As shown in FIG.6 and FIG.7, the outer periphery beam heat insulating material 70 is each divided | segmented by each balcony floor beam 54A-54C. The divided outer peripheral beam heat insulating materials 70 are arranged in contact with or close to the balcony floor beam 54 (specifically, the flanges 54b and 54c) on both sides of the balcony floor beam 54, respectively.

  The in-beam heat insulating material is provided for each connection portion 83 of the outer peripheral beam 30 with the balcony floor beams 54A to 54C. As shown in FIG. 6, in the connection part 83 with the balcony floor beam 54A in the outer peripheral beam 30A, a pair of in-beam heat insulating materials 80 and 81 are provided in the groove portion 31a of the outer peripheral beam 30A. These in-beam heat insulating materials 80 and 81 are provided on both sides of the fixed plate 72 (in other words, the web 54a of the balcony floor beam 54).

  The in-beam heat insulating materials 80 and 81 are made of glass wool as a fiber heat insulating material, and are formed in a plate shape having a predetermined thickness (in a natural state). The in-beam heat insulating materials 80 and 81 are disposed across the groove portion 31a of the outer peripheral beam 30 and the groove portion 56 of the balcony floor beam 54 while being bent in an L shape. Specifically, the in-beam heat insulating materials 80 and 81 are respectively provided for the groove portions 56a and 56b of the balcony floor beam 54, and the in-beam heat insulating material 80 and the groove portion 31a of the outer peripheral beam 30 and the balcony floor beam. 54, the in-beam heat insulating material 81 is disposed across the groove 31a of the outer peripheral beam 30 and the groove 56b of the balcony floor beam 54.

  More specifically, each of the heat insulating materials 80 and 81 in the beam includes the first heat insulating portions 80a and 81a disposed in the groove portion 31a of the connection portion 83 of the outer peripheral beam 30, and the first heat insulating portions 80a and 81a. 30 (groove portion 31a) extending in opposite directions to each other in the longitudinal direction, second heat insulating portions 80b and 81b entering between the outer peripheral beam heat insulating material 70 and the web 30a, and extending from the first heat insulating portions 80a and 81a to the outdoor side. And third heat insulating portions 80c and 81c that have entered the grooves 56a and 56b of the balcony floor beam 54.

  The first heat insulating portions 80a and 81a and the second heat insulating portions 80b and 81b are provided so as to straddle the flanges 30b and 30c in the vertical direction in the groove portion 31a of the outer circumferential beam 30, and are connected to the web 30a in the indoor and outdoor directions. It is provided so as to straddle the outer peripheral beam heat insulating material 70. Specifically, each of the heat insulating portions 80a (81a) and 80b (81b) is compressed up and down between the flanges 30b and 30c, and between the web 30a and the outer peripheral beam heat insulating material 70, indoors and outdoors. It is provided in a compressed state.

  The third heat insulating portions 80c and 81c are provided so as to straddle the flanges 54b and 54c in the vertical direction in the grooves 56a and 56b of the balcony floor beam 54, and specifically, compressed vertically between the flanges 54b and 54c. It is provided in the state that was done. In addition, the third heat insulating portions 80c and 81c have a length in the indoor / outdoor direction larger than that of the first heat insulating portion 80a. More specifically, the length of the first heat insulating portions 80a and 81a is 2 in the indoor / outdoor direction. Has been larger than twice. As a result, the length (in other words, the thickness) of the in-beam heat insulating materials 80 and 81 in the indoor / outdoor direction is sufficiently secured at the connection portion 83 of the outer peripheral beam 30.

  Further, the in-beam heat insulating material 81 (specifically, the first heat insulating portion 81a and the second heat insulating portion 81b) is disposed so as to straddle the groove portions 31a of the adjacent outer peripheral beams 30A and 30B. Thereby, the clearance gap between each outer periphery beam 30A, 30B is the state covered from the outdoor side by the heat insulating material 81 in a beam.

  As shown in FIG. 7, in the connection part 83 with the balcony floor beam 54C in the outer periphery beam 30B, a pair of in-beam heat insulating materials 90 and 91 are provided in the groove part 31a of the outer periphery beam 30B. These in-beam heat insulating materials 90 and 91 are respectively provided on both sides of the web 54a of the balcony floor beam 54C in the longitudinal direction of the outer peripheral beam 30B. The in-beam heat insulating materials 90 and 91 are made of glass wool as a fiber heat insulating material, and are formed in a plate shape having a predetermined thickness (in a natural state).

  Among the in-beam heat insulating materials 90 and 91, the in-beam heat insulating material 90 is basically the same in configuration as the above-described in-beam heat insulating materials 80 and 81, and the grooves 31 a of the outer peripheral beam 30 and the balcony floor beam 54. The arrangement of the grooves 56a is basically the same. Therefore, the explanation is omitted here. That is, the in-beam heat insulating material 90 is arranged in an L shape so as to straddle the groove portion 31a of the outer peripheral beam 30B and the groove portion 56a of the balcony floor beam 54C, and each of the heat insulating portions 90a to 90c is provided. Have.

  In contrast, the in-beam heat insulating material 91 is provided across the groove portion 31a of the outer peripheral beam 30B and the groove portion 56b of the balcony floor beam 54C, and thereby the indoor and outdoor direction (in other words, the longitudinal length of the balcony floor beam 54C). A straight line extending in the direction). That is, the in-beam heat insulating material 91 has a first heat insulating portion 91a disposed in the groove portion 31a of the outer peripheral beam 30, and a second heat insulating portion 91b disposed in the groove portion 56b of the balcony floor beam 54C. .

  The first heat insulating portion 91a of the in-beam heat insulating material 91 is provided in a state of being vertically compressed between the flanges 30b and 30c in the groove portion 31a of the outer peripheral beam 30B, and the second heat insulating portion 91b is a groove portion 56b of the balcony floor beam 54C. Are provided in a state compressed vertically between the flanges 54b, 54c. Further, in the groove portion 31a, the first heat insulating portion 91a is provided in contact with the first heat insulating portion 90a of the in-beam heat insulating material 90, so that each of the in-beam heat insulating materials 90, A continuous heat insulation line is formed by 91 (first heat insulation portions 90a, 91a).

  In addition, although illustration is abbreviate | omitted, also in the connection part 83 with the balcony floor beam 54B in the outer periphery beam 30B, the heat insulation materials 80 and 81 in a beam are arrange | positioned by the same arrangement structure as the connection part 83 with the balcony floor beam 54A mentioned above. Has been.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  In the connection part 83 with the balcony floor beam 54 in the outer periphery beam 30, the heat insulating materials 80, 81, 90, 91 in the beam were disposed in the groove portion 31a. Thereby, although the outer peripheral beam heat insulating material 70 is divided by the balcony floor beam 54 at the connection portion 83 of the outer peripheral beam 30, the in-beam heat insulating materials 80, 81, 90, 91 are disposed in the groove portion 31a of the outer peripheral beam 30. Therefore, it can suppress that the outer periphery beam 30 becomes a thermal bridge in the said connection part 83. FIG. Thereby, the fall of heat insulation performance can be suppressed.

  Regarding the in-beam heat insulating materials 80, 81, 90, a part of the in-beam heat insulating materials 80, 81, 90 was inserted between the outer peripheral beam heat insulating material 70 and the web 30 a of the outer peripheral beam 30. Thereby, since the in-beam heat insulating materials 80, 81, 90 and the outer peripheral beam heat insulating material 70 can be provided continuously in the longitudinal direction of the outer peripheral beam 30, the effect of suppressing a decrease in heat insulating performance can be enhanced.

  Further, the portions (second heat insulating portions 80b, 81b, 90b) of the in-beam heat insulating materials 80, 81, 90 that have entered between the outer peripheral beam heat insulating material 70 and the web 30a are brought into contact with the outer peripheral beam heat insulating material 70. Provided. Thereby, the continuous heat insulation line can be formed with the heat insulating materials 80, 81, 90 and the outer peripheral beam heat insulating material 70, and as a result, the effect of suppressing the deterioration of the heat insulating performance can be further enhanced.

  The in-beam heat insulating materials 80, 81, 90, 91 are disposed across the groove portion 31 a of the outer peripheral beam 30 and the groove portion 56 of the balcony floor beam 54 at the connection portion 83 of the outer peripheral beam 30. Thereby, since the length (in other words, the thickness of the in-beam heat insulating materials 80, 81, 90, 91) of the in-beam heat insulating materials 80, 81, 90, 91 can be increased, the heat insulating performance is deteriorated. Can be further suppressed.

  In-beam heat insulating materials 80 and 81 (90, 91) are respectively provided for the grooves 56a and 56b of the balcony floor beam 54 made of H-shaped steel, and each of the in-beam heat insulating materials 80 and 81 (90, 91) is provided. Is disposed so as to straddle the groove 31a of the outer peripheral beam 30 and the groove 56a (56b) of the balcony floor beam 54. Thereby, even when the balcony floor beam 54 is made of H-shaped steel, the above-described effect can be obtained by increasing the thickness of the in-beam heat insulating materials 80, 81, 90, 91.

  Specifically, with respect to the heat insulating materials 80, 81, 90 in the beam, the first heat insulating portions 80a, 81a, 90a disposed in the groove portion 31a at the connection portion 83 of the outer peripheral beam 30, and the first heat insulating portions 80a, 80a, 81a, 90a extending along the groove 31a, the second heat insulating parts 80b, 81b, 90b entering between the outer peripheral beam heat insulating material 70 and the web 30a, and the first heat insulating parts 80a, 81a, 90a extending to the outdoor side from the balcony It has the 3rd heat insulation part 80c, 81c, 90c which entered the groove part 56 of the floor beam 54, and formed in L shape. As a result, the second heat insulating portions 80b, 81b, 90b allow the in-beam heat insulating materials 80, 81, 90 and the outer peripheral beam heat insulating material 70 to be continuous in the longitudinal direction of the outer peripheral beam 30, and the third heat insulating portions 80c, 81c. , 90c can increase the length of the in-beam heat insulating materials 80, 81, 90, 91 in the indoor / outdoor direction, so that the deterioration of the heat insulating performance can be greatly suppressed.

  Since the in-beam heat insulating materials 80, 81, and 90 are formed of fiber heat insulating materials, the in-beam heat insulating materials 80, 81, and 90 can be easily formed into an L shape by bending or the like. , 81, 90 can be easily filled in both the groove 31a of the outer peripheral beam 30 and the groove 56 of the balcony floor beam 54, respectively.

  Since the in-beam heat insulating material 81 is disposed across the groove portions 31a of the respective outer peripheral beams 30A and 30B provided adjacent to each other, a gap generated between the outer peripheral beams 30A and 30B is formed by the intra-beam heat insulating material 81. Can be closed from the outside. Thereby, the entry / exit of air through the gap, and hence the entry / exit of heat accompanying the entry / exit of the air can be suppressed, and the heat insulation performance can be improved.

  In the building 10 in which the balcony 20 is provided so as to protrude from the building body 12 to the outdoor side, the balcony 20 may be supported by a plurality of balcony floor beams 54 connected to the outdoor side of the outer circumferential beam 30. In such a configuration, since the outer peripheral beam heat insulating material 70 is divided by the plurality of balcony floor beams 54, the heat insulating performance is likely to be lowered. In this respect, in the above embodiment, since the in-beam heat insulating materials 80, 81, 90 are provided for each connection portion 83 of the outer peripheral beam 30 with each balcony floor beam 54, the heat insulation performance is lowered even in such a configuration. Can be suppressed.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  (1) In the above embodiment, the in-beam heat insulating materials 80, 81, 90, 91 are disposed across the groove portion 31a of the outer peripheral beam 30 and the groove portion 56 of the balcony floor beam 54. You may arrange | position only in the groove part 31a of the outer periphery beam 30. FIG. For example, the heat insulating material in the beam includes a portion disposed in the groove portion 31a in the connection portion 83 of the outer peripheral beam 30, and the outer peripheral beam heat insulating material 70 extending from the portion along the groove portion 31a and the web 30a of the outer peripheral beam 30. It is conceivable to form a straight line having a portion that is in between. Even in this case, since the in-beam heat insulating material and the outer peripheral beam heat insulating material 70 can be provided continuously in the longitudinal direction of the outer peripheral beam 30, the effect of suppressing a decrease in heat insulating performance can be enhanced.

  Moreover, you may make it arrange | position a heat insulating material in a beam only to the connection part 83 of the outer periphery beam 30 in the groove part 31a. Also in this case, it can suppress that the outer periphery beam 30 becomes a thermal bridge in the said connection part 83, and can suppress the fall of heat insulation performance. Moreover, if it is such a structure, it is not necessary to use the shape steel which has a groove part as the balcony floor beam 54, for example, the shape steel which does not have a groove part, such as square steel, a square material, etc. can also be used.

  (2) In the above embodiment, the heat insulating structure of the present invention is applied to the outer circumferential beam 30 made of H-shaped steel. However, the outer circumferential beam is made of another shape steel having a groove, such as channel steel or I-shaped steel. Even in this case, the present invention can be applied. For example, even when the outer peripheral beam is made of a grooved steel having a web and a pair of flanges extending from the upper and lower end portions of the web to the outdoor side, the inner peripheral beam is inserted into the groove at the connection portion of the outer peripheral beam with the balcony floor beam 54. If a heat insulating material is arrange | positioned, it can suppress that an outer periphery beam turns into a thermal bridge in the connection part of an outer periphery beam.

  (3) In the above embodiment, the groove portion 31a of the connecting portion 83 of the outer peripheral beam 30A is blocked by the fixing plate 72 in the longitudinal direction of the outer peripheral beam 30, but the plate 72 is not provided in the groove portion 31a. If it exists, you may arrange | position the heat insulating material in a beam so that it may straddle both the outer periphery beam heat insulating materials 70 divided | segmented by the balcony floor beam 54 in the groove part 31a. If it does so, both the outer periphery beam heat insulating materials 70 parted through the heat insulating material in one beam can be continued in the longitudinal direction of the outer periphery beam 30, and the effect which suppresses the fall of heat insulation performance can be heightened.

  (4) The in-beam heat insulating materials 80, 81, 90, 91 may be formed of a foam heat insulating material (hard heat insulating material) such as urethane foam resin. In this case, it is conceivable that the in-beam heat insulating materials 80, 81, 90 are formed in an L shape by resin molding, and the in-beam heat insulating material 91 is also formed in a linear shape by resin molding. In general, since the foam-based heat insulating material has higher heat insulating performance than fiber-based heat insulating materials such as glass wool, the heat insulating performance can be improved.

  (5) The outer peripheral beam heat insulating material 70 and the beam inner heat insulating materials 80, 81, 90, 91 may be joined and integrated in advance at the manufacturing plant by bonding or the like. For example, it is conceivable to join the in-beam heat insulating materials 80, 81, 90, 91 to the end portions in the longitudinal direction of the outer peripheral beam heat insulating material 70. Then, when installing the outer peripheral beam heat insulating material 70 and the intra-beam heat insulating materials 80, 81, 90, 91 on the outer peripheral beam 30 and the balcony floor beam 54 at the construction site, the heat insulating materials 70, 80 ( 81, 90, 91) can be handled as a single unit, so that the operation is easy.

  (6) In the configuration in which the eaves portion (corresponding to the overhanging portion) is provided so as to project from the second floor portion 16 of the building body 12 to the outdoor side, a plurality of the eaves portions connected to the outer peripheral beam of the second floor portion 16 The heat insulating structure of the present invention may be applied to the outer peripheral beam when it is supported by the supporting beam.

  DESCRIPTION OF SYMBOLS 10 ... Building, 12 ... Building body, 20 ... Balcony as projecting part, 30 ... Outer beam, 30a ... Web, 31b. 31c ... flange, 31a ... groove, 54 ... balcony floor beam as cross beam and support beam, 56a, 56b ... groove, 70 ... outer peripheral beam heat insulating material, 80, 81 ... in-beam heat insulating material, 90, 91 ... in-beam heat insulating material Wood.

Claims (8)

It is made of a shaped steel having a web and a pair of flanges provided on both sides of the web, and is provided along the outer periphery of the building with the groove surrounded by the web and the flanges facing outward. Outer peripheral beams,
A cross beam connected to the outdoor side of the peripheral beam and extending in a direction crossing the peripheral beam;
An outer peripheral beam heat insulating material made of foam-based heat insulating material, provided to extend along the outer peripheral beam so as to cover the entire vertical height of the outer peripheral beam on the outdoor side of the outer peripheral beam, and divided by the intersecting beam And comprising
A heat insulating structure for a building, wherein an in-beam heat insulating material is disposed in the groove at a portion of the outer peripheral beam connected to the cross beam.   2. The heat insulating structure for a building according to claim 1, wherein a part of the heat insulating material in the beam is provided between the outer peripheral beam heat insulating material and the web in the groove portion. . The cross beam is made of a shape steel having a web and a pair of flanges provided on both sides of the web, and is provided with a groove portion surrounded by the web and the flanges facing sideways. And
The said heat insulating material in a beam is arrange | positioned ranging over the groove part of the said outer periphery beam in the said connection part of the said outer periphery beam, and the groove part of the said cross beam, The Claim 1 or 2 characterized by the above-mentioned. Thermal insulation structure of the building.   The heat insulating material in the beam includes a first heat insulating portion disposed in a groove portion at the connection portion of the outer peripheral beam, and the outer peripheral beam heat insulating material and the web extending from the first heat insulating portion along the groove portion. It is characterized by having an L shape by having a second heat insulating part that enters between and a third heat insulating part that extends from the first heat insulating part to the outdoor side and enters the groove part of the cross beam. The heat insulating structure for a building according to claim 3. The cross beam is made of an H-shaped steel having the groove portion opened to the side on both sides of the web,
The heat insulating material in the beam is provided for each of the grooves of the cross beam,
The heat insulating material in each of these beams is disposed across the groove portion of the outer peripheral beam and the groove portion of the intersecting beam at the connecting portion of the outer peripheral beam. Insulation structure of the building described.   The heat insulating structure for a building according to any one of claims 1 to 5, wherein the in-beam heat insulating material is formed of a fiber heat insulating material. A plurality of the outer circumferential beams are provided side by side along the outer periphery of the building,
The intersecting beam is connected to at least one of the outer peripheral beams in the vicinity of the boundary between the adjacent outer peripheral beams,
The heat insulating structure for a building according to any one of claims 1 to 6, wherein the in-beam heat insulating material is disposed across the groove portions of the respective outer peripheral beams. Applied to a building comprising a building body and a projecting portion provided to project from the building body to the outdoor side,
The outer peripheral beam is provided along the outer peripheral portion of the building body,
The overhang portion includes a plurality of support beams as the cross beams connected to the outer circumferential beam,
The outer peripheral beam heat insulating material is divided by each of the support beams,
The heat insulating structure for a building according to any one of claims 1 to 7, wherein the in-beam heat insulating material is disposed for each connection portion of the outer peripheral beam with each of the support beams.

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