JP2012172393A - Thermal insulation structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal insulation structure of a building that prevents reduction in thermal insulation performance.SOLUTION: The building includes a balcony lower unit 20A and a balcony unit 20B provided above it and having an inner balcony 18. An inter-floor space 50 is formed between a ceiling substrate 42 of the balcony lower unit 20A and a floor substrate 45 of the balcony unit 20B. The inter-floor space 50 includes an inter-floor thermal insulation material 65 which is installed so as to include at least a lower region of the inner balcony 18 as an installation region. In a ceiling part of the balcony lower unit 20A, a reinforcement beam 35 is disposed, which vertically faces a lower surface part of a balcony floor beam 33 of the balcony unit 20B and has an upper surface part 35a extending along the floor beam 33. In the reinforcement beam 35, the height position of the upper surface part 35a is set above a ceiling beam 25, the inter-floor thermal insulation material 65 is held in a compressed state between the upper surface part 35a and the lower surface part of the balcony floor beam 33.

Description

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

  In a unit type building composed of a plurality of building units, an inner balcony may be provided above a room (upper floor portion) provided in a lower floor portion. In this case, the living room is formed by the lower floor unit, and the inner balcony is formed by the upper floor unit above it. In such a building, in order to ensure the heat insulation performance of the living room, it is required that the inter-floor portion between the inner balcony and the living room has a heat insulating structure.

  As this type of heat insulating structure, a configuration is known in which a heat insulating material such as glass wool is installed in an interfloor space between a floor surface material of an inner balcony and a ceiling surface material of a living room. Patent Document 1 discloses a configuration in which glass wool is provided as an airtight material in a gap (a gap between beams) between a floor beam and a ceiling beam that are opposed to each other in an upper floor unit and a lower floor unit that are vertically adjacent to each other. ing. According to this, it is possible to suppress the entry / exit of air to / from the space between the beams through the gap between the beams, and consequently, the entry / exit of heat can be suppressed. Therefore, the heat insulation performance can be improved.

Japanese Patent No. 3887092

  By the way, the ceiling surface material of the one-floor room is installed indoors, while the floor material of the inner balcony is installed on the outdoor side, so between these surface materials forming the interstory space It is conceivable that a large temperature difference occurs. In this case, it is assumed that air convection occurs due to this temperature difference in the interfloor space, and then heat transfer is promoted between the first floor room and the outside (inner balcony) via the interfloor portion. Therefore, there is a concern about a decrease in heat insulation performance. In particular, in a cold district, the temperature difference is remarkably increased, so that air convection is promoted in the space between floors, and there is a possibility that a decrease in heat insulation performance may appear remarkably.

  This invention is made | formed in view of the said situation, and makes it the main objective to provide the heat insulation structure of the building which can suppress the fall of heat insulation performance.

  In order to solve the above problems, a heat insulating structure for a building according to a first aspect of the present invention includes an upper floor unit and a lower floor unit provided adjacent to the lower floor unit, and the upper floor unit includes a plurality of floor small units. A floor surface material supported by a beam is provided, and the lower floor unit is provided with a ceiling surface material supported by a plurality of ceiling beams, and a floor is provided between the floor surface material and the ceiling surface material. An inter-space is formed, and is applied to a unit-type building that is at least a part of the upper floor unit and has a semi-outdoor space above the floor material. In a heat insulating structure of a building in which an interstitial heat insulating material is installed so as to include at least a lower region that is below the space as an installation region, the ceiling portion of the lower floor unit is sandwiched between the upper floor heat insulating material and the upper floor heat insulating material. Oppositely facing the lower surface of the floor beam of the floor unit, A sandwiching member having an upper surface portion formed so as to extend along the floor beam is provided, and the height position of the upper surface portion is set above the ceiling beam, and the sandwiching member Is characterized in that the interstitial heat insulating material is sandwiched in a compressed state between the upper surface portion and the lower surface portion of the floor beam.

  According to the present invention, the interstitial heat insulating material is installed so that the interstitial space between the floor material of the upper floor unit and the ceiling surface material of the lower floor unit includes at least the lower region of the semi-outdoor space as the installation region. The upper surface of the sandwiching member whose interstitial heat insulating material is provided on the lower surface of the floor beam on the floor of the upper floor unit and extends along the lower surface of the floor beam on the ceiling of the lower floor unit. It is sandwiched in a compressed state with the part. In this case, since the space between the sandwiching member and the floor beam can be blocked by the interstitial heat insulating material, air flow between the sandwiching member and the floor beam can be suppressed in the interstory space. Therefore, air convection in the interstory space can be suppressed, and as a result, a decrease in heat insulation performance can be suppressed.

  In the lower floor unit, the upper surface of the ceiling beam is lower than the upper surface of the sandwiching member, so the distance between the lower surface of the floor beam and the upper surface of the ceiling beam is the floor beam. The distance between the lower surface portion and the upper surface portion of the sandwiching member is larger. Therefore, the interstitial heat insulating material can be sandwiched between the floor beam and the sandwiching member, but can be prevented from being sandwiched between the floor beam and the ceiling beam. Or, when the interstitial heat insulating material is sandwiched between the floor beam and the sandwiching member and between the floor beam and the ceiling beam, the degree of compression by the sandwiching is determined by the former and the latter. Specifically, the latter can be compressed smaller. Therefore, between the floor beam and the ceiling beam, heat insulation can be ensured by the interstitial heat insulating material, and air flow can be suppressed by the interstitial heat insulating material between the floor beam and the sandwiching member. .

  In the heat insulation structure for a building according to a second invention, in the first invention, the sandwiching member is a ceiling support beam that supports the ceiling surface material together with the ceiling beam, and the ceiling support beam is the ceiling beam. The upper surface is formed with a vertical dimension larger than the vertical dimension of the beam, and the lower surface of the beam is installed at substantially the same height as the lower surface of the ceiling beam. It is located above the beam.

  According to the present invention, since the sandwiching member is configured using the ceiling support beam that supports the ceiling face material together with the ceiling beam in the lower floor unit, the sandwiching member is configured as a separate member from the ceiling support beam. Compared to the case, the configuration can be simplified.

  In the heat insulating structure for a building of the third invention, in the first or second invention, the sandwiching is performed between a pair of large floor beams extending parallel to the plurality of floor beams in the floor portion of the upper floor unit. An intermediate beam is bridged across the upper part of the member, and the intermediate beam is supported from below by the sandwiching member.

  When a semi-outdoor space such as a balcony is provided in the upper floor unit, an intermediate beam may be provided on the floor portion of the upper floor unit to support the load of the constituent members constituting the semi-outdoor space. For example, the intermediate beam is provided so as to be bridged between a pair of large floor beams extending in parallel with the small floor beam. In this case, it is assumed that the intermediate beam bends downward due to the load of the constituent members, and the semi-outdoor space sinks downward. In this regard, in the present invention, since the intermediate beam is supported from below by the sandwiching member, the bending of the intermediate beam can be suppressed. That is, in this structure, it has the structure which provided the support function which supports an intermediate beam in the pinching member for pinching | interposing and compressing an interstitial heat insulating material, and multi-functionalization of the pinching member is achieved by this. .

  In the heat insulation structure of a building according to a fourth aspect of the present invention, in the third aspect of the invention, a continuous heat insulation layer is formed in the interstory space by a plurality of the interstitial heat insulating materials, and the heat insulation layer is formed between the interstory. A plurality of regions having different upper and lower thicknesses in a non-compressed state of the heat insulating material, wherein a region having a large thickness of the heat insulating layer is provided along a lower surface of the intermediate beam, and the intermediate beam and the lower floor It is characterized by being sandwiched between the ceiling material of the unit.

  According to the present invention, the heat insulating layer having a relatively large thickness is formed along the lower surface of the intermediate beam in the interstory space, and the heat insulating layer is sandwiched vertically between the intermediate beam and the ceiling surface material of the lower floor unit. It is said. For this reason, it is possible to suppress air flow between both sides of the intermediate beam in the interstory space. That is, according to this configuration, air flow in a direction perpendicular to the beam (floor beam and ceiling beam) can be suppressed by the sandwiching member in the interstitial space, and parallel to the beam by the intermediate beam. The flow of air in the direction can be suppressed. Therefore, air convection in the interstory space can be further suppressed, and the heat insulation performance can be further suppressed.

  In the heat insulation structure of a building according to a fifth invention, in the fourth invention, the upper floor unit includes the semi-outdoor space and a living room space provided adjacent to the semi-outdoor space. It is arrange | positioned on both sides which pinched | interposed the said intermediate beam in planar view, The said heat insulation layer is inserted | pinched between the said intermediate beam and the ceiling surface material of the said lower floor unit, It is characterized by the above-mentioned. .

  When a semi-outdoor space is formed using a part of the space of the upper floor unit, the air in the interstitial space that is heated or cooled through the floor surface material of the semi-outdoor space exposed to the outside, It is conceivable that in the same space, it flows from the semi-outdoor space side to the living room space side. For this reason, there is a concern about the deterioration of the heat insulation performance on the side of the living room. In this case, it is conceivable to install an interstitial heat insulating material also in the lower area of the living room space in the interstitial space, but if it is possible in view of the installation cost of the interstitial heat insulating material, the burden of installation work, etc. I want to avoid. Therefore, in the present invention, in view of this point, air between the semi-outdoor space side and the living room space side in the interstitial space is obtained by the interstitial heat insulating material (heat insulating layer) sandwiched between the intermediate beam and the ceiling surface material. Distribution is suppressed. In this case, the heat insulation performance on the side of the room space can be ensured without installing the interstitial heat insulating material in the lower region of the room space in the interstory space.

  In the heat insulation structure for a building of the sixth invention, in any one of the first to fifth inventions, the gap between the lower surface portion of the floor beam and the upper surface portion of the sandwiching member is the vertical width of the gap. And a spacer having substantially the same height dimension as the above.

  According to the present invention, since the vertical width of the gap between the lower surface portion of the floor beam and the upper surface portion of the sandwiching member is held by the spacer, the above-mentioned gap is reduced by bending the floor beam or the like downward. Can be prevented. Accordingly, it is possible to avoid applying an excessive load to the interstitial heat insulating material sandwiched between the floor beam and the interposing member in the gap, and as a result, it is possible to prevent the interstitial heat insulating material from being damaged. Therefore, the airtight effect by sandwiching the interstitial heat insulating material can be maintained for a long time.

  In the heat insulating structure for a building according to a seventh invention, in any one of the first to sixth inventions, the sandwiching member is formed of channel steel or square steel having a height that is higher than the ceiling beam. The inside of the groove steel or the square steel is an installation space for passing piping or wiring.

  Since the interstitial space between the upper floor space that has a semi-outdoor space and the lower floor space below it is installed as described above, wiring and piping can be passed through the interfloor space. It has become difficult. In this regard, in the present invention, the sandwiching member is formed of groove steel or square steel having a height that is larger than that of the ceiling beam, so that an installation space for allowing piping or wiring to pass therethrough can be formed. For this reason, wiring or piping can be suitably installed in the space between floors by using this installation space.

The front view which shows the outline | summary of a unit type building. The perspective view which shows the structure of a building unit. The perspective view which shows the structure of a balcony lower unit. The perspective view which shows the structure of a balcony unit. The longitudinal cross-sectional view which shows the structure between the floor part between a balcony lower unit and a balcony unit, and its periphery. The perspective view which shows the state which decomposed | disassembled the lower balcony unit and the balcony unit up and down. The longitudinal cross-sectional view which shows the structure of an interstory part. The longitudinal cross-sectional view which shows the structure of the floor part in the installation site | part of an intermediate beam. The perspective view which shows the state in which the spacer member was installed on the reinforcement beam. The figure explaining the structure in the case of installing an exhaust duct in the space between floors. The figure explaining the structure in the case of installing wiring in the space between floors.

  Hereinafter, an embodiment will be described with reference to the drawings. In this embodiment, a unit type building is adopted as the building. FIG. 1 is a front view showing an outline of a unit type building.

  As shown in FIG. 1, a building 10 includes a building body 12 disposed on a foundation 11 and a roof 13 disposed above the building body 12. The building body 12 is a two-story building including a first-floor portion 14 and a second-floor portion 15, and is configured by connecting a plurality of building units 20 to each other.

  In the present embodiment, as the structure of the building main body 12, a so-called unit separation arrangement method is used in which a plurality of building units 20 are separated and an intermediate structure portion having a configuration different from the building unit 20 is constructed at the separation intermediate portion. We adopt what we had. In FIG. 1, in the first floor portion 14 and the second floor portion 15, the building portions X1 and X2 are unit structure portions formed by connecting a plurality of building units 20 to each other, and the building portion X3 is a unit structure portion. It is an intermediate structure provided in an intermediate space between X1 and X2.

  The building unit 20 is not installed in the intermediate structure portion X3, and the intermediate structure portion X3 is opposed to each other with the intermediate structure portion X3 interposed therebetween, using the building units 20 of the unit structure portions X1 and X2. The building unit 20 is constructed by bridging various building materials. In the illustrated configuration, the building unit 20 is separated by one unit in the short direction (wife direction), so that the intermediate structure portion X3 is on the short side (wife surface side) of the building unit 20. The width is substantially the same as the width of.

  Briefly describing the unit separation arrangement method, an intermediate ceiling beam is provided between the two building units 20 that are separated from each other in a state of being bridged over a ceiling ceiling beam 22 (see FIG. 2). In the intermediate structure portion X3, the outer wall panel is attached while being supported by the intermediate ceiling beam. Further, the floor frame is fixed in a state where it is placed on the foundation in the first floor portion, and the floor frame is fixed in a state where it is placed on the intermediate ceiling beam in the second floor portion. The floor frame has the same configuration as that of the floor of the building unit 20, and has four joints (column-less joints) and a floor frame girder.

  A first floor room 16 is formed in the first floor portion 14 of the building body 12. The first-floor room 16 is provided in the unit structure portion X1 and is formed using the entire space of the building unit 20. An inner balcony 18 is provided on the second floor portion 15 of the building body 12. The inner balcony 18 is provided above the first-floor room 16 in the unit structure portion X1. The inner balcony 18 is provided using about half the space of the building unit 20, and a second-floor room 19 is formed on the indoor side. Specifically, the inner balcony 18 is provided on one side (outdoor side) of the building unit 20 in half in the short direction. In this case, the indoor part and the inner balcony 18 are formed in one unit housing.

  The building unit 20 forming the first-floor room 16 and the building unit 20 forming the inner balcony 18 (and the second-floor room 19) are provided adjacent to each other in the vertical direction. In the following description, the former building unit 20 is The lower balcony unit 20A and the latter building unit 20 are referred to as a balcony unit 20B.

  FIG. 2 is a perspective view showing the configuration of the building unit. As shown in FIG. 2, the building unit 20 includes four columns 21 disposed at the four corners thereof, and four ceiling beams 22 and floor beams 23 that connect the upper end portion and the lower end portion of each column 21, respectively. With. A rectangular parallelepiped skeleton (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of a square tube-shaped square steel. Moreover, the ceiling beam 22 and the floor beam 23 are made of channel steel having a U-shaped cross section, and are installed so that the opening portions thereof face each other, that is, the groove portion faces the inside of the unit. In addition, the pair of flanges facing each other in the channel steel are positioned above and below.

  A plurality of ceiling beams 25 are bridged and fixed between the large ceiling beams 22 of the long side portion (girder portion) of the building unit 20 facing each other. Similarly, a plurality of floor beams 26 are bridged and fixed at predetermined intervals between the large floor beams 23 of the long side portion (girder portion) of the building unit 20 facing each other. The ceiling beam 25 and the floor beam 26 are provided horizontally on the ceiling beam 22 and the floor beam 23 on the short side (wife side) at the same interval. For example, the ceiling beam 25 is made of lip groove steel, and the floor beam 26 is made of square steel. The ceiling member 27 is supported by the ceiling beam 25 and the floor member 28 is supported by the floor beam 26.

  Next, the configuration of the balcony lower unit 20A and the balcony unit 20B will be described. These units 20A and 20B have a characteristic configuration with respect to the building unit 20, and the following description will focus on the characteristic points.

  First, the configuration of the balcony lower unit 20A will be described with reference to FIG. FIG. 3 is a perspective view showing the configuration of the balcony lower unit 20A. The lower balcony unit 20A has the same basic configuration as the building unit 20 shown in FIG. 2, and includes columns 21 arranged at the four corners, a ceiling beam 22 and a floor beam 23 connecting the columns 21, and This is the same in that it includes a plurality of floor beams 26 connected to the large floor beam 23, and the configuration of the ceiling portion is different. In FIG. 3, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 3, in the balcony lower unit 20 </ b> A, as a configuration different from the building unit 20, a plurality of ceiling beams 25 are bridged between a pair of long ceiling-side beams 22 and are reinforced. A beam 35 is stretched over. Specifically, the lower balcony unit 20 </ b> A has a configuration in which some of the plurality of ceiling beams 25 in the building unit 20 are replaced with reinforcing beams 35. In the lower balcony unit 20A, the ceiling beam 25 is made of lip groove steel having a smaller height than the ceiling beam 22, and its lower surface is the same height as the lower surface of the ceiling large beam 22 (the lower surface of the lower flange). It is fixed so that it is positioned (this is the same for the building unit 20). Therefore, the ceiling beam 25 is fixed below the upper surface portion (upper surface portion of the upper flange) of the ceiling large beam 22.

  A plurality (two in FIG. 3) of the reinforcing beams 35 are bridged between the pair of ceiling beams 22 on the long side, and both ends thereof are connected to the ceiling beams 22 by brackets (not shown). Each reinforcing beam 35 is arranged at a position where the inner region surrounded by the four ceiling beams 22 is approximately equally divided in the unit long side direction. Each reinforcing beam 35 is disposed on both sides of the plurality of ceiling beams 25. Each reinforcing beam 35 is made of the same grooved steel as the ceiling beam 22 and is provided with the groove openings facing each other at the same height as the ceiling beam 22. In this case, the reinforcing beam 35 is provided so as to partially protrude above the upper surface portion of the ceiling beam 25, and the height position of the upper surface portion 35a (the upper surface portion of the upper flange portion) is the ceiling beam 25. It is located above the upper surface part.

  Then, the structure of the balcony unit 20B is demonstrated based on FIG. 4A is a perspective view showing the structure of the skeleton of the balcony unit 20B, and FIG. 4B is a perspective view showing a state in which the inner balcony 18 is provided on the balcony unit 20B. The balcony unit 20B has a basic configuration similar to that of the building unit 20 described in FIG. 2, and includes columns 21 disposed at four corners, a ceiling beam 22 and a floor beam 23 connecting the columns 21. The point is the same, and the configuration of the floor portion is different. In FIG. 4, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 4A, in the balcony unit 20 </ b> B, an intermediate beam 31 is provided as a configuration different from the building unit 20 so as to span the pair of floor big beams 23 on the short side. That is, the intermediate beam 31 is provided between and in parallel with the pair of large floor beams 23 on the long side. 4A, the back side of the figure is the indoor side (the second-floor room 19 side of FIG. 1) of the pair of long side floor beams 23, and the front side of the figure is the outdoor side (FIG. 1). This is a floor girder on the inner balcony 18 side). Hereinafter, for convenience of explanation, the floor girder 23 on the second-floor room 19 side is also referred to as “room floor girder 23A”, and the floor girder 23 on the inner balcony 18 side is also referred to as “balcony floor girder 23B”.

  The intermediate beam 31 is made of the same channel steel as the floor girder 23 and is provided at the same height position, and both ends thereof are connected to a pair of floor girder 23 on the short side by brackets (not shown). Yes. The intermediate beam 31 is provided with the groove portion facing the room floor large beam 23A, and a plurality of room floor small beams 32 are fixed between the intermediate beam 31 and the room floor large beam 23A. The room floor beam 32 is made of square steel similar to the floor beam 26 of the normal building unit 20 and has the same fixing method, but its length is about ½ of the floor beam 26. It is different in point.

  A plurality of balcony floor beams 33 are fixed between the intermediate beam 31 and the balcony floor beam 23B. The balcony floor beam 33 is formed of a square rope having a smaller width dimension in the height direction than the living room floor beam 32, and one end is fixed to the groove side of the balcony floor beam 23B and the other end is intermediate. The beam 31 is fixed on the side opposite to the groove (web outer surface). As a fixing method, bracket fixing, welding, bolting, or the like is used.

  The living room floor beam 32 is fixed so that a part protrudes upward from the upper surface portion of the intermediate beam 31 (upper surface portion of the upper flange), whereas the balcony floor beam 33 is formed of the intermediate beam 31. It is fixed below the upper surface portion (the upper surface portion of the upper flange). That is, the living room floor beam 32 and the balcony floor beam 33 are arranged such that the former upper surface portion is at a higher position and the latter upper surface portion is at a lower position by comparing them. However, the lower surface portion of the balcony floor beam 33 is set at a position that does not protrude downward from the lower surfaces of the floor beam 23 and the intermediate beam 31, and in this embodiment, the lower surface portion of the balcony floor beam 33 and the floor beam. 23 and the lower surface of the intermediate beam 31 are at the same level. Similarly, the lower surface portion of the living room floor beam 32 is set to a position that does not protrude downward from the lower surface portions of the large floor beam 23 and the intermediate beam 31. In addition, the living room floor beam 32 and the balcony floor beam 33 are basically arranged in a straight line at the same pitch as viewed in the unit short direction. The pitch of the living room floor beam 32 and the pitch of the balcony floor beam 33 are the same as the pitch of the ceiling beam 25 and the reinforcing beam 35 of the balcony lower unit 20A.

  Next, a configuration in a state where the inner balcony 18 is installed in the balcony unit 20B will be described. As shown in FIG.4 (b), the partition wall part 51 which partitions off the inner balcony 18 and the two-story room 19 is provided on the intermediate beam 31 of the balcony unit 20B. The partition wall portion 51 is installed along the intermediate beam 31, and the load is supported by the intermediate beam 31. The partition wall 51 is provided with an entrance (not shown) that allows the inner balcony 18 and the second-floor room 19 to come and go, and a discharge window (not shown) is provided at the entrance. In addition, a pair of balcony sleeve walls 52 are provided on both sides of the inner balcony 18 on both the left and right sides of the partition wall 51, and each balcony sleeve wall 52 is provided on the outdoor open side of the inner balcony 18. A handrail wall portion 53 is provided so as to straddle the outdoor side end portion. A balcony space is formed inside the partition wall 51, the balcony sleeve wall 52, and the handrail wall 53.

  Next, the configuration of the inter-floor portion 40 between the balcony lower unit 20A and the balcony unit 20B will be described with reference to FIG. FIG. 5 is a longitudinal cross-sectional view showing the configuration of the inter-floor portion 40 of each of the building units 20A and 20B and the periphery thereof. FIG. 5 is a longitudinal sectional view in which the interstitial portion 40 is cut by a plane parallel to the long sides (girder planes) of the building units 20A and 20B, and the cut plane is set on the inner balcony 18 side. Yes.

  As shown in FIG. 5, the inter-floor portion 40 divides the first-floor room 16 formed in the lower balcony unit 20 </ b> A from the inner balcony 18 and the second-floor room 19 formed in the balcony unit 20 </ b> B up and down. The ceiling part of the first floor room 16 (lower balcony unit 20A) and the inner balcony 18 and the floor part of the second floor room 19 (balcony unit 20B) are configured. As a configuration of the ceiling portion of the one-floor room 16 in the inter-floor portion 40, a field edge 41 is fixed to the lower surface of the ceiling beam 25 and the reinforcing beam 35 of the lower balcony unit 20 </ b> A in a direction orthogonal to the beams 25 and 35. Has been. A ceiling base material 42 made of gypsum board is fixed to the lower surface of the field edge 41, and a ceiling finishing material (not shown) made of cloth or the like is fixed to the lower surface. Here, the reinforcing beam 35 functions as a ceiling support beam that supports the ceiling base material 42 together with the ceiling beam 25.

  On the other hand, as a structure of the floor portion of the inner balcony 18, a floor base material 45 made of particle board is fixed on the balcony floor beam 33 of the balcony unit 20B, and the floor base material 45 is made of polystyrene foam or the like. A balcony floor insulation 46 is provided. Further, a waterproof sheet 47 made of a vinyl chloride coated steel plate is provided on the balcony floor heat insulating material 46, and a balcony floor finish (not shown) is appropriately laid on the upper surface side thereof. The outer edge portion of the waterproof sheet 47 is raised upward along the starter fitting 49 that supports the lower end portion of the balcony sleeve wall portion 52.

  In addition, although illustration is abbreviate | omitted, as a structure of the floor part of the second-floor room 19, the floor base material which consists of particle boards etc. is fixed on the living room floor beam 32, and the floor surface of the second-floor room 19 is formed on it. Floor finishing materials are provided. Further, in the above-described configuration, an interstory space 50 is formed in the interstory portion 40 between the ceiling base material 42 and the floor base material 45 (and the floor base material on the living room floor beam 32).

  As another configuration shown in FIG. 5, the outer wall panel 55 of the first floor portion 14 is fixed to the ceiling beam 22 of the lower balcony unit 20 </ b> A, and a heat insulating material 58 and an inner wall are provided on the indoor side of the outer wall panel 55. A panel 59 is provided. Further, the outer wall panel 56 of the second floor portion 15 is fixed to the floor beam 23 of the balcony unit 20B, and a parting material 57 is attached to a boundary portion between the outer wall panel 56 and the outer wall panel 55 of the first floor portion 14. ing. In addition, the balcony lower unit 20A and the balcony unit 20B are provided so that three of the four surfaces face the outdoors.

  Next, the heat insulation structure in the interstory part 40 is demonstrated.

  In the ceiling large beam 22 of the lower balcony unit 20 </ b> A, an in-beam heat insulating material 61 made of glass wool is provided so as to fill the groove portion 67 of the ceiling large beam 22 and over the entire longitudinal direction of the ceiling large beam 22. The in-beam heat insulating material 61 is disposed in each of the four ceiling beams 22 in the balcony lower unit 20A. Therefore, the heat insulating material 61 in the beam is installed not only on the three ceiling beams 22 arranged on the outdoor side but also on the ceiling beam 22 arranged on the indoor side (intermediate structure part X3 side).

  Similarly, the in-beam heat insulating material 62 made of glass wool is provided in the entire longitudinal direction of the floor girder 23 so as to fill the groove 68 of the floor girder 23 in the floor girder 23 of the balcony unit 20B. The in-beam heat insulating material 62 is disposed on each of the four large floor beams 23 in the balcony unit 20B. In this way, by providing the in-beam heat insulating materials 61 and 62 on the ceiling beam 22 and the floor beam 23, it is suppressed that the large beams 22 and 23 become thermal bridges and the heat insulation performance is deteriorated.

  The ceiling girder 22 of the lower balcony unit 20A and the floor girder 23 of the balcony unit 20B are provided adjacent to each other in the vertical direction, and a predetermined gap 69 (hereinafter referred to as a beam gap) is provided between the girder 22 and 23. Is formed. In the inter-beam gap 69, an inter-beam heat insulating material 63 made of glass wool is provided. The inter-beam heat insulating material 63 is formed so as to extend in the longitudinal direction of the large beams 22 and 23 in the inter-beam gap 69 and is arranged in the inter-beam gap 69 of each of the four beams of the building units 20A and 20B. . The inter-beam heat insulating material 63 has a thickness (vertical length) larger than the vertical width of the inter-beam gap 69, and is provided in a state compressed by the large beams 22 and 23 in the inter-beam gap 69. In this case, since air can be prevented from entering and exiting the interstory space 50 through the inter-beam gap 69, the airtightness of the interstitial space 50 can be maintained. Moreover, since the entrance / exit of the heat | fever to the space 50 can also be suppressed by suppressing the entrance / exit of the air to / from the floor space 50, the improvement of heat insulation performance can be aimed at.

  Further, an interstory heat insulating material 65 is provided in the interstory space 50. The present embodiment is characterized by the installation configuration of the interstitial heat insulating material 65. The installation configuration will be described in detail below with reference to FIGS. 6 and 7 in addition to FIG. 6 is a perspective view showing a state where the balcony lower unit 20A and the balcony unit 20B are disassembled vertically, and FIG. 7 is a longitudinal sectional view showing the structure of the interstitial portion 40. As shown in FIG. FIG. 7 is a longitudinal sectional view taken along the same cutting plane as FIG. 5, and the illustration of the interstitial heat insulating material 65 is omitted for convenience.

  As shown in FIG. 6, the interstitial heat insulating material 65 is a region below the inner balcony 18 in the ceiling back space of the balcony lower unit 20A, that is, the interstory space 50 (hereinafter, this region is referred to as a balcony lower region X, The lower area of the second-floor room 19 in the interspace 50 is referred to as a lower room area Y). Specifically, the interstitial heat insulating material 65 is generally installed only in the balcony lower region X in the interstory space 50, and is not installed in the living room lower region Y. Part of the region Y also protrudes). As described above, since the intermediate beam 31 is installed below the partition wall portion 51 that partitions the inner balcony 18 and the second-floor room 19, both sides of the intermediate beam 31 are sandwiched in the interstory space 50. The area is a balcony lower area X and a room lower area Y, respectively.

  The interstitial heat insulating material 65 is formed of glass wool. The interstitial heat insulating material 65 has a long shape having substantially the same length as the long side portion of the balcony lower unit 20A, and is formed in a plate shape having a predetermined thickness. A plurality of the interstitial heat insulating materials 65 are provided in a direction extending in the long side direction of the balcony lower unit 20A in the balcony lower region X of the interstitial space 50, and arranged in the lateral direction of the balcony lower unit 20A. In this case, the adjacent interstitial heat insulating materials 65 are continuous in the short direction, and therefore, a continuous heat insulating layer 66 is formed by the plurality of interstitial heat insulating materials 65.

  Among the inter-floor heat insulating materials 65 arranged in the unit short direction in the balcony lower region X, the inter-floor heat insulating material 65 (hereinafter referred to as “65a”) arranged on the lower side region Y side is vertically Two are stacked on top of each other. The interstitial heat insulating material 65a is disposed along the intermediate beam 31 below the intermediate beam 31 of the balcony unit 20B, and is compressed between the intermediate beam 31 and the ceiling base material 42 as described later. Has become. In this case, the thickness of the heat insulating layer 66 (specifically, the thickness of the heat insulating layer 66 in the non-compressed state) is larger at the position below the intermediate beam 31 than the other portions.

  As shown in FIG. 5, the interstitial heat insulating material 65 is installed on the ceiling base material 42 in the interstitial space 50, and is provided so as to straddle the ceiling beams 25 and the reinforcing beams 35. Yes. Here, each ceiling beam 25 and each reinforcing beam 35 are provided vertically above the balcony floor beam 33 of the balcony unit 20B, and the interstitial heat insulating material 65 includes the ceiling beam 25 and It is arranged between the balcony floor beam 33 and between the reinforcing beam 35 and the balcony floor beam 33. In this arrangement state, the interstitial heat insulating material 65 is continuous with the in-beam heat insulating material 61 at both ends in the longitudinal direction (long side direction of the building unit 20). A continuous heat insulation line is formed with the material 61.

  As shown in FIG. 7, the reinforcing beam 35 is reinforced because the height position of the upper surface portion 35 a is set higher than the upper surface portion (upper surface portion of the upper flange) of the ceiling beam 25 as described above. The vertical distance H1 between the upper surface 35a of the beam 35 and the lower surface of the balcony floor beam 33 is smaller than the vertical distance H2 between the upper surface of the ceiling beam 25 and the lower surface of the balcony floor beam 33. ing. Specifically, the vertical distance H1 between the reinforcing beam 35 and the balcony floor beam 33 is smaller than the thickness dimension L1 (see FIG. 6) of the interstitial heat insulating material 65 (in an uncompressed state). Yes. Therefore, the interstitial heat insulating material 65 is sandwiched between the reinforcing beam 35 and the balcony floor beam 33 by being compressed vertically by the beams 33 and 35. In this case, since the space between the reinforcing beam 35 and the balcony floor beam 33 is blocked by the interstitial heat insulating material 65, the interstitial space 50 is a space between both sides of the interstitial region of the interstitial heat insulating material 65. Air flow is suppressed between them.

  FIG. 8 is a vertical cross-sectional view showing the configuration of the interstitial portion 40 at the installation site of the intermediate beam 31. 8 shows a longitudinal section in which the interstitial portion 40 is cut by a plane parallel to the long side portions (girder planes) of the building units 20A and 20B (in other words, a vertical plane parallel to the longitudinal direction of the intermediate beam 31). FIG.

  As shown in FIG. 8, in the interstory space 50, two interstitial heat insulating materials 65 a are installed along the intermediate beam 31 at a position below the intermediate beam 31. The inter-story heat insulating material 65a has an upper and lower thickness L2 (see FIG. 6) larger than the vertical distance H3 between the intermediate beam 31 and the ceiling base material 42 in a state where two sheets are stacked (L2 is L1). Twice). Therefore, the interstitial heat insulating material 65a is sandwiched between the intermediate beam 31 and the ceiling base material 42 while being compressed vertically. In this case, the space between the intermediate beam 31 and the ceiling base material 42 is blocked by the interstitial heat insulating material 65a. Therefore, in the interlevel space 50, between the both side spaces sandwiching the intermediate beam 31, That is, air circulation is suppressed between the balcony lower area X and the room lower area Y. More specifically, the interstitial heat insulating material 65a is sandwiched between the intermediate beam 31 and the ceiling base material 42 at the end of the living room lower region Y, and a part of the interstitial heat insulating material 65a is in the lower room region Y. It protrudes to the side.

  FIG. 9 is a perspective view showing a state in which the spacer member 71 is installed on the reinforcing beam 35. In FIG. 9, for the sake of convenience, the thickness of the heat insulating layer 66 is shown constant. As shown in FIG. 9, spacer members 71 are provided on the reinforcing beam 35 on both sides of an interstitial heat insulating material 65 (specifically, a heat insulating layer 66 composed of a plurality of interstitial heat insulating materials 65). The spacer member 71 has a columnar shape having substantially the same height as the vertical distance H1 between the reinforcing beam 35 and the balcony floor beam 33 above the spacer member 71, and the spacer member 71 is installed on the reinforcing beam 35. It has a function of maintaining the vertical distance H1 between the reinforcing beam 35 and the balcony floor beam 33 (see FIG. 7). In this case, the balcony floor beam 33 can be bent downward and the interstitial heat insulating material 65 can be prevented from being sandwiched between the balcony floor beam 33 and the reinforcing beam 35. As a result, the interstitial heat insulating material 65 is cut by the sandwiching. Such damage can be suppressed. For this reason, it becomes possible to maintain the effect of suppressing the circulation of air by the interstitial heat insulating material 65 described above over a long period of time.

  The spacer member 71 is formed of a material having a relatively low thermal conductivity, and is made of, for example, a hard rubber material. Therefore, it is suppressed that the spacer member 71 becomes a thermal bridge of the interstory portion 40. The spacer member 71 is not necessarily formed of a material having a low thermal conductivity, and may be formed of a material having a high thermal conductivity such as a metal.

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

  The interstitial heat insulating material 65 was installed so as to include at least the balcony lower region X that is below the inner balcony 18 in the interstory space 50 as an installation target. A reinforcing beam is provided on the ceiling of the lower balcony unit 20A so as to face the balcony floor beam 33 in the vertical direction between the pair of opposed ceiling beams 22 and to extend along the floor beam 33. Over 35. And the height position of the upper surface part 35a of the reinforcement beam 35 is set above the ceiling beam 25, and the interstitial heat insulating material 65 is compressed between the upper surface part 35a and the lower surface part of the balcony floor beam 33. I tried to pinch it. In this case, since the space between the reinforcing beam 35 and the balcony floor beam 33 can be blocked by the interstitial heat insulating material 65, air flows between the reinforcing beam 35 and the balcony floor beam 33 in the interstory space 50. Can be suppressed. Therefore, air convection in the interstory space 50 can be suppressed, and as a result, a decrease in heat insulation performance can be suppressed.

  Further, since the height position of the upper surface portion of the ceiling beam 25 is made lower than the height position of the upper surface portion 35a of the reinforcing beam 35, the distance between the lower surface portion of the balcony floor beam 33 and the upper surface portion of the ceiling beam 25 is reduced. The distance between the lower surface portion of the balcony floor beam 33 and the upper surface portion 35a of the reinforcing beam 35 is larger. Therefore, the interstitial heat insulating material 65 can be sandwiched between the balcony floor beam 33 and the reinforcing beam 35, but can be prevented from being sandwiched between the balcony floor beam 33 and the ceiling beam 25. Alternatively, when the interstitial heat insulating material 65 is sandwiched between the balcony floor beam 33 and the reinforcing beam 35 and between the balcony floor beam 33 and the ceiling beam 25, the floor floor beam 33 is compressed by the sandwiching. The former can be made different between the former and the latter. Specifically, the latter can be compressed smaller. Therefore, between the balcony floor beam 33 and the ceiling beam 25, heat insulation is ensured by the interstitial heat insulating material 65, and between the balcony floor beam 33 and the reinforcing beam 35, the interstitial heat insulating material 65 provides air. Can be suppressed.

  Even if all the ceiling beams 25 of the lower balcony unit 20A are replaced with the reinforcing beams 35, air convection in the interstory space 50 can be suppressed. However, in a unit type building that is a kind of industrialized house, it is desirable that the ceiling beam 25 be formed with a strength that can support the ceiling base material 42 and the like in order to suppress an increase in cost as much as possible. Is preferably formed with a height dimension smaller than that of the ceiling girder 22 (reinforcing beam 35). In this regard, in the above configuration in which only a part of each ceiling beam 25 is replaced by the reinforcing beam 35, it is possible to suppress the heat insulation performance while suppressing an increase in cost.

  The reinforcing beam 35 is formed to have a vertical dimension larger than the vertical dimension of the ceiling beam 25, and the lower surface thereof is installed at substantially the same height as the lower surface of the ceiling beam 25, so that the upper surface part 35a is mounted on the ceiling. It was located above the beam 25. In this case, the reinforcing beam 35 can be used together with the ceiling beam 25 to support the ceiling base material 42. That is, in this case, since the sandwiching member (reinforcing beam 35) is configured using the ceiling support beam that supports the ceiling base material 42, the sandwiching member is installed as a separate member from the ceiling support beam. Thus, the configuration can be simplified.

  In the balcony unit 20 </ b> B, the intermediate beam 31 is bridged between the pair of large floor beams 23 extending in parallel to the plurality of balcony floor beams 33 so as to straddle the reinforcing beam 35. It was set as the structure supported from the downward direction. In this case, it is possible to suppress the intermediate beam 31 from being bent downward due to the load of the constituent member (for example, the partition wall portion 51) constituting the inner balcony 18. In other words, in this configuration, the sandwiching member (reinforcing beam 35) is provided with a support function for supporting the intermediate beam 31, thereby achieving multi-function of the sandwiching member.

  In the interstitial space 50, a continuous heat insulating layer 66 was formed by a plurality of interstitial heat insulating materials 65, and a plurality of regions in which the thicknesses L <b> 1 and L <b> 2 of the heat insulating layer 66 differed were provided. And the area | region where the thickness of the heat insulation layer 66 was large was provided along the lower surface of the intermediate beam 31, and it was made to pinch | interpose between the intermediate beam 31 and the ceiling base material 42. FIG. In this case, in the interstitial space 50, the air flow between both sides of the intermediate beam 31, that is, between the balcony lower area X and the room lower area Y can be suppressed. Therefore, in the interstitial space 50, the flow of air in the direction orthogonal to the small beams 25 and 33 can be suppressed by the reinforcing beam 35, and the flow of air in the direction parallel to the small beams 25 and 33 can be performed by the intermediate beam 31. Can be suppressed. Therefore, the air convection in the interstory space 50 can be further suppressed, and the heat insulation performance can be further suppressed.

  An inner balcony 18 and a second-floor room 19 are provided adjacent to the balcony unit 20B, an intermediate beam 31 is installed between the two spaces 18 and 19, and an end of the heat insulating layer 66 is connected to the intermediate beam 31 and the ceiling base material 42. Sandwiched between. In this case, as described above, since the air flow is suppressed between the balcony lower area X and the room lower area Y in the interstory space 50, it is cooled via the floor base material 45 of the inner balcony 18 or the like. The air in the interstitial space 50 that is warmed or warmed can be prevented from flowing from the balcony lower area X side to the room lower area Y side. Therefore, in the above configuration in which the inner balcony 18 is formed by using a part of the balcony unit 20B, the inter-floor portion 40 on the side of the second-floor living room 19 side can be provided without installing the inter-floor heat insulating material 65 in the lower room Y area. Insulation performance can be secured.

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

  (1) In the inter-story space 50, the inter-story heat insulating material 65 is installed as described above, and therefore it is difficult to pass piping and wiring. Therefore, piping or wiring may be passed through the space inside the reinforcing beam 35 of the balcony lower unit 20A. For example, it is conceivable to install a ventilation duct in the space inside the reinforcing beam 35. A specific example is shown in FIG. In the building 80 shown in FIG. 10A, an alcove 84 is formed in a part of the lower balcony unit 20 </ b> A, and the room space of the first floor room 16 is reduced by the space of the alcove 84. The alcove 84 is provided below the inner balcony 18 in the lower balcony unit 20A.

  In the first floor portion 14, a bathroom 85 is formed in the intermediate structure portion X3 where the building unit 20 is not installed. An exhaust device 87 is installed in the bathroom 85. The exhaust device 87 includes a ventilation fan, a hood, and the like, and is connected to the exhaust duct 88. The exhaust duct 88 is connected to an exhaust port 89 provided in the alcove 84. In this case, the air in the bathroom 85 can be discharged to the alcove 84 through the exhaust duct 88 by the exhaust device 87, and can be discharged outdoors.

  The exhaust duct 88 extends across the ceiling back space 91 of the bathroom 85 and the ceiling back space (that is, the interstory space 50) of the lower balcony unit 20A (alcove 84 and the first floor room 16). In this case, a duct through-hole through which the exhaust duct 88 can be inserted is formed in the ceiling large beam 22 (specifically, the web) on the intermediate structure portion X3 side of the balcony lower unit 20A, and the exhaust duct is passed through this duct insertion hole. 88 extends across both ceiling back spaces 50 and 91. The ceiling space 91 of the bathroom 85 is formed above the ceiling material 90 of the bathroom 85, and the ceiling material 90 is supported by a floor unit 94 installed on the second floor portion 15 of the intermediate structure portion X3. . In addition, the floor unit 94 is installed across the building units 20 that are separated from each other.

  FIG. 10B is a longitudinal sectional view showing an installation state of the exhaust duct 88 in the reinforcing beam 35. As shown in the figure, in the interstitial space 50, the exhaust duct 88 is disposed in the inner region 95 of the reinforcing beam 35, more specifically, in the inner region 95 surrounded by the web portion and the upper and lower flange portions in the reinforcing beam 35. Has been. As described above, since the reinforcing beam 35 is made of grooved steel having a height that is higher than that of the ceiling beam 25, the inner area 95 is relatively large, and the exhaust duct 88 is installed in the inner area 95. It can be used as an installation space. In the inner region 95 of the reinforcing beam 35, the exhaust duct 88 is installed so as to extend along the reinforcing beam 35, and its downstream side is above the exhaust port 89 in the reinforcing beam 35 (specifically, the lower flange portion thereof). It extends to the exhaust port 89 through the formed insertion hole. According to such a configuration, the exhaust duct 88 can be suitably installed in the interstory space 50 by using the inner region 95 of the reinforcing beam 35.

  Next, an example in which wiring is installed using the inner region 95 of the reinforcing beam 35 is shown in FIG. A building 100 shown in FIG. 11 is the building 80 shown in FIG. 10 in which the first floor portion 14 of the intermediate structure portion X3 is replaced with a bathroom 85 to form a living room 101. A storage battery facility 103 is installed in the ceiling space 102 of the living room 101. The storage battery facility 103 can store generated power generated by a solar panel (not shown). A power supply wiring 104 is connected to the storage battery facility 103, and the power supply wiring 104 extends across the ceiling space 102 of the living room 101 and the interstory space 50 of the lower balcony unit 20 </ b> A. In the floor space 50, the power supply wiring 104 is provided so as to extend along the reinforcing beam 35 in the inner region 95 of the reinforcing beam 35. The power supply wiring 104 is drawn out to the first-floor room 16 through an opening (not shown) formed in the ceiling material of the first-floor room 16 and installed on the partition wall 105 that partitions the alcove 84 and the first-floor room 16. It is connected to an outdoor outlet 106. In this case, the alcove 84 can use the charging power of the storage battery facility 103. According to this configuration, the power supply wiring 104 can be suitably installed in the interstory space 50 using the inner region 95 of the reinforcing beam 35.

  Note that the reinforcing beam 35 may be formed of square steel instead of groove steel, and the inner region may be used as an installation space for installing wiring and piping. In this case, it is necessary to use a rectangular steel having a height higher than that of the ceiling beam 25 so that wiring and piping can be installed in the inner region. This is the same as in the case of channel steel.

  (2) The configuration of the sandwiching member (the reinforcing beam 35 in the above embodiment) is not limited to the configuration of the above embodiment, and may be other configurations. For example, the sandwiching member is formed in the same configuration and the same size as the ceiling beam 25, and is bridged between a pair of ceiling beams 22 that are opposed to the ceiling beam 25 while being shifted upward. Also good. In this case, since the height position of the upper surface portion of the sandwiching member is located higher than the upper surface portion of the ceiling beam 25, the interstitial heat insulating material 65 can be sandwiched. Further, in this case, since the sandwiching member can be constituted by the same member as the ceiling beam 25, there is an advantage that the parts can be shared.

  Further, the sandwiching member may be constituted by a member other than the beam material. For example, a long spacer member extending along the small beam 25 may be installed on the small beam 25 as the sandwiching member. The spacer member is formed of, for example, a square steel having a flat shape. In this case, since the height position of the upper surface portion of the spacer member is located above the ceiling beam 25, the interstitial heat insulating material 65 can be sandwiched. Moreover, in this structure, since the structure of the ceiling part of the balcony lower unit 20A can be made the same as that of the building unit 20, the (normal) building unit 20 can be used as the balcony lower unit 20A. Therefore, there is an advantage that the building unit can be shared. In such a configuration, the spacer member does not have to be provided across the pair of facing ceiling beams 22, and may be provided only under the interstory heat insulating material 65, for example.

  (3) In the above embodiment, the interstitial heat insulating material 65 is provided only in the balcony lower region X in the interstitial space 50, but in addition to this, it may be provided in the living room lower region Y. For example, it is conceivable to provide the entire space 50. In this case, the heat insulation performance of the interstory part 40 can be improved.

  In this case, it is desirable that the thickness of the interstitial heat insulating material 65 is larger than the vertical distance between the upper surface portion 35a of the reinforcing beam 35 and the lower surface portion of the living room floor beam 32. Then, the interstitial heat insulating material 65 can be sandwiched not only between the reinforcing beam 35 and the balcony floor beam 33, but also between the reinforcing beam 35 and the living room floor beam 32, and is reinforced in the interstitial space 50. The entire longitudinal direction of the beam 35 can be blocked by the interstitial heat insulating material 65. Therefore, air convection in the interstory space 50 can be further suppressed.

  (4) In the above embodiment, the inner balcony 18 is formed as a semi-outdoor space on the balcony unit 20B as the upper floor unit, but other semi-outdoor spaces such as a veranda and a terrace may be formed. Moreover, in the said embodiment, although the inner balcony 18 was formed using the one part space of the balcony unit 20B, you may form an inner balcony using the whole space of the balcony unit 20B. In that case, it is necessary to install the interstitial heat insulating material 65 in the whole space 50.

  (5) A unit-type building may be constructed as a three-story building, and a balcony unit 20B may be installed on the third floor and a balcony lower unit 20A may be installed adjacent to the second floor. In a three-story building, a balcony unit 20B may be installed on the second floor, and a balcony lower unit 20A may be installed on the first floor adjacent vertically.

  (6) In the above embodiment, in the balcony lower region X, the number of the heat insulating materials 65 in the stacking direction (the number of stacking) is different between the lower position of the intermediate beam 31 and the other portions. In the parts other than the lower position of the beam 31, the number of interlaminar heat insulating materials 65 is one, and in the lower position of the intermediate beam 31, the number of interlaminar heat insulating materials 65 a is two. At the position below the beam 31, the number of interstitial heat insulating materials 65a may be three or more. In short, in the balcony lower region X, the thickness of the heat insulating layer 66 at the lower position of the intermediate beam 31 (specifically, the thickness of the heat insulating layer 66 in the non-compressed state; hereinafter the same) is set at a portion other than the lower position of the intermediate beam 31. What is necessary is just to make it larger than the thickness of the heat insulation layer 66. Further, the interstitial heat insulating material 65a is made thicker than the other interstitial heat insulating materials 65 (that is, the interstitial heat insulating material 65 installed in a portion other than the position below the intermediate beam 31; the same applies hereinafter). It may be formed. In this case, the number of interlaminar heat insulating materials 65a may be arbitrary.

  In addition, the interstitial heat insulating material 65a is formed with a thickness smaller than that of the other interstitial heat insulating materials 65, and a plurality of the heat insulating materials 65a are stacked to install the interstitial heat insulating material 65a in a stacked state. You may make it larger than thickness L1 (thickness L1 per sheet) of the other interstitial heat insulating material 65. For example, the thickness of the interstitial heat insulating material 65a in a state where the thickness of the interstitial heat insulating material 65a is made smaller than the thickness L1 of the other interstitial heat insulating materials 65 and the four layers or more are stacked and installed. May be three times the thickness L1 of the other interstitial heat insulating material 65. Moreover, the thickness of the interstitial heat insulating material 65a in the state where it was piled up by making the thickness of the interstitial heat insulating material 65a smaller than the thickness L1 of the other interstitial heat insulating material 65 and stacking two of them. May be 1.5 times the thickness L1 of the other interstitial heat insulating material 65. In these cases, the thickness in the state where a plurality of interstitial heat insulating materials 65a are stacked, that is, the thickness of the heat insulating layer 66 at a position below the intermediate beam 31, is the vertical distance between the intermediate beam 31 and the ceiling base material 42. Note that it needs to be larger than H3.

  DESCRIPTION OF SYMBOLS 10 ... Building, 18 ... Inner balcony as semi-outdoor space, 19 ... Second floor room as living room space, 20 ... Building unit, 20A ... Balcony lower unit as lower floor unit, 20B ... Balcony unit as upper floor unit, 22 ... ceiling beam, 23 ... floor beam, 25 ... ceiling beam, 31 ... intermediate beam, 33 ... balcony floor beam as floor beam, 35 ... reinforcing beam as sandwiching member and ceiling support beam, 35a ... upper surface 50 ... Interstitial space, 65 ... Interstitial insulation, 66 ... Insulation layer.

Claims (7)

An upper floor unit and a lower floor unit provided adjacent to the lower floor unit, and the upper floor unit is provided with a floor material supported by a plurality of floor beams. A ceiling surface material supported by a plurality of ceiling beams is provided, and an interstory space is formed between the floor surface material and the ceiling surface material, and is at least part of the upper floor unit, Applied to unit type buildings where a semi-outdoor space is provided above the flooring material,
In the heat insulating structure of the building where the interstitial heat insulating material is installed in the interstitial space so as to include at least a lower region that is below the semi-outdoor space as an installation region,
The lower floor unit is formed on the ceiling portion so as to face the lower surface portion of the floor beam of the upper floor unit with the interstitial heat insulating material interposed therebetween and to extend along the floor beam. A sandwiching member having an upper surface portion is provided;
The height position of the upper surface portion is set above the ceiling beam,
The heat insulation structure for a building, wherein the sandwiching member sandwiches the interstitial heat insulating material in a compressed state between the upper surface portion and the lower surface portion of the floor beam. The sandwiching member is a ceiling support beam that supports the ceiling surface material together with the ceiling beam.
The ceiling support beam is formed with a vertical dimension larger than the vertical dimension of the ceiling beam, and the lower surface thereof is installed at substantially the same height as the lower surface of the ceiling beam. The heat insulating structure for a building according to claim 1, wherein the upper surface portion serving as an upper end is positioned above the ceiling beam. Between the pair of floor beams extending in parallel to the plurality of floor beams in the floor portion of the upper floor unit, an intermediate beam is bridged over the sandwiching member,
The heat insulation structure for a building according to claim 1, wherein the intermediate beam is supported from below by the sandwiching member. In the interstitial space, a continuous heat insulating layer is formed by a plurality of interstitial heat insulating materials,
The heat insulating layer has a plurality of regions having different upper and lower thicknesses in an uncompressed state of the interstitial heat insulating material, and a region where the heat insulating layer is thick is provided along the lower surface of the intermediate beam. The heat insulating structure for a building according to claim 3, wherein the building is sandwiched between the intermediate beam and a ceiling surface material of the lower floor unit. The upper floor unit includes the semi-outdoor space and a living room space provided adjacent to the semi-outdoor space, and both the spaces are arranged on both sides of the intermediate beam in plan view,
5. The heat insulating structure for a building according to claim 4, wherein an end of the heat insulating layer is sandwiched between the intermediate beam and a ceiling surface material of the lower floor unit.   The spacer between the lower surface portion of the floor beam and the upper surface portion of the sandwiching member is provided with a spacer having substantially the same height as the vertical width of the clearance. The heat insulation structure of the building as described in any one of thru | or 5. The sandwiching member is formed of groove steel or square steel having a larger vertical height than the ceiling beam,
The heat insulation structure for a building according to any one of claims 1 to 6, wherein an inner space of the groove steel or the square steel is an installation space for passing piping or wiring.

Images