JP7307705B2 - Airtight structure of building and method for assembling airtight members - Google Patents

Description

TECHNICAL FIELD The present invention relates to an airtight structure of a building and a method of assembling an airtight member.

In Patent Document 1 below, an inter-floor space is formed between a ceiling base material of a balcony unit equipped with an inner balcony and a floor base material of a unit under the balcony, and an inter-floor heat insulating material is installed in this inter-floor space. A structure is disclosed. Further, in Patent Document 1 below, reinforcing beams are arranged in the ceiling part of the unit under the balcony, and inter-floor space is achieved by sandwiching an inter-floor heat insulating material between the upper surface of this reinforcing beam and the balcony floor beam. It suppresses the circulation of air in

JP 2012-172393 A

However, the heat insulating structure described in Patent Document 1 does not take into consideration the suppression of ventilation from the inner balcony to the roof, and there is room for improvement in terms of improving the heat insulating performance of the entire building.

SUMMARY OF THE INVENTION In view of the above facts, it is an object of the present invention to provide an airtight structure for a building and a method for assembling airtight members that can improve the insulation performance of a building that includes building units with inner balconies. do.

The airtight structure of the building according to the first aspect includes: a first building unit provided under a flat roof and provided with a wing wall that separates a semi-outdoor space from an indoor space; a second building unit provided below the flat roof and provided with a front wall at the boundary portion with the semi-outdoor space; and a first ceiling girder disposed along the boundary portion in the first building unit. A first joist superimposed under the second building unit, a second joist superimposed under the second ceiling girder disposed facing the first ceiling girder in the second building unit, and the first An extension portion extending from at least one of the joist and the second joist to the opposing joist side, and the first joist and the second joist overlapping on the extension portion an airtight member that covers the opening from above.

In the airtight structure of the building according to the first aspect, a first building unit and a second building unit are provided adjacently under a flat roof, and the first building unit is a semi-outdoor space (inner It has a wing wall that separates the balcony) from the indoor space. On the other hand, the second building unit has a front wall at the boundary with the semi-outdoor space. Here, the first building unit is provided with a first ceiling girder along the boundary with the second building unit, and the first ceiling girders are superimposed below the first ceiling girders. The second ceiling girders are arranged to face the first ceiling girders, and the second ceiling girders are arranged below the second ceiling girders. Here, an extension portion is extended from at least one of the first joist and the second joist to the opposing joist side, and the airtight member is superimposed on the extension to form the first joist and the second joist. It covers the opening between the joists from above. As a result, it is possible to suppress upward ventilation from the semi-outdoor space to the flat roof.

In the airtight structure of a building according to a second aspect, in the first aspect, the airtight member extends from the outer peripheral portion of the building to the indoor space side of the wing wall.

In the airtight structure of the building according to the second aspect, it is possible to reliably suppress ventilation compared to a structure in which the airtight member is arranged only up to the sleeve wall.

A method for assembling an airtight member according to a third aspect includes: a first building unit provided under a flat roof and provided with a wing wall separating a semi-outdoor space from an indoor space; and adjacent to the first building unit. and a second building unit provided below the flat roof and provided with a front wall at the boundary with the semi-outdoor space, wherein the first a step of attaching a first extending portion extending from a first joist superimposed under the first ceiling girders arranged along the boundary portion of the building unit toward the second building unit; A step of attaching a second extending portion extending from a second joist superimposed below a second ceiling girder arranged to face the first ceiling girder to the second building unit and extending toward the first building unit side. and a step of overlapping an airtight member on the first extending portion and the second extending portion to cover the opening between the first joist and the second joist from above.

In the method of assembling the airtight member according to the third aspect, by attaching the first extending portion to the first joist and attaching the second extending portion to the second joist, the front wall does not get in the way. can be extended. By overlapping the airtight member on the first extending portion and the second extending portion, even in a structure in which the front wall is disposed, the opening between the first joist and the second joist can be blocked to suppress ventilation to the flat roof.

INDUSTRIAL APPLICABILITY As described above, according to the airtight structure of a building and the method for assembling an airtight member according to the present invention, it is possible to improve the heat insulating performance of a building including building units having inner balconies.

It is a perspective view showing roughly the whole building structure concerning an embodiment. 2 is an enlarged cross-sectional view showing a state cut along line 2-2 of FIG. 1; FIG. FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2; 3 is a cross-sectional view corresponding to FIG. 2, showing a state before the airtight member is assembled; FIG. FIG. 5 is a cross-sectional view showing a state after the airtight member is assembled from the state shown in FIG. 4; FIG. 2 is a cross-sectional view of a building according to a comparative example taken along line 2-2 of FIG. 1;

Hereinafter, the airtight structure of the building 10 according to the embodiment will be described with reference to the drawings. In the following description, two horizontal directions perpendicular to each other are defined as the X direction and the Y direction.

As shown in FIG. 1, a building 10 to which the airtight structure of the present embodiment is applied is formed by arranging a plurality of building units vertically and horizontally. A second floor portion of the building 10 is configured including the building unit 12 and the second building unit 14 . A third building unit 16 and a fourth building unit 18 are arranged below the first building unit 12 and the second building unit 14. The third building unit 16 and the fourth building unit 18 provide 10 ground floor parts are constructed. Furthermore, the building 10 of the present embodiment has a configuration including a flat roof 20 above the first building unit 12 and the second building unit 14 . The first building unit 12 and the second building unit 14, which are essential parts of the present invention, will be described below.

The first building unit 12 is provided below the flat roof 20 and is formed in a substantially rectangular parallelepiped shape with the X direction as the longitudinal direction. In addition, the first building unit 12 includes a semi-outdoor space (inner balcony) S1 and an indoor space S2 that are adjacent in the X direction. and the indoor space S2.

The semi-outdoor space S1 is a substantially rectangular parallelepiped space, and one side in the Y direction is open. A balustrade 26 is provided on one side in the Y direction that is open. A front wall 24 is provided on the other side in the Y direction in the semi-outdoor space S1. The front wall 24 is arranged at the boundary between the first building unit 12 and the second building unit 14 and attached as the second building unit 14 .

Here, a ventilation blocking member 28 is arranged at the outer peripheral edge of the ceiling of the building 10 . Specifically, the air blocking member 28 is arranged along the outer peripheral edge of the ceiling of the building unit 12 and the building unit 14 . The ventilation blocking member 28 is formed of, for example, a sponge tape containing resin sponge such as soft urethane sponge and polyurethane foam as a main component.

As shown in FIG. 2, the first ceiling girders 34 are arranged on the ceiling of the first building unit 12 . The first ceiling girders 34 extend in the X direction along the docking line DL that is the boundary between the first building unit 12 and the second building unit 14, and the side opposite to the second building unit 14 side is open. It is made of channel steel with a substantially U-shaped cross section.

A first mounting bracket 42 is mounted within the cross-section of the first ceiling girders 34 . One end of a first ceiling beam 43 is fixed to the first mounting bracket 42 . The first ceiling girders 43 extend in the Y direction, and the other end of the first ceiling girders 43 is fixed to a ceiling girders (not shown) arranged substantially parallel to the first ceiling girders 34. there is

A first L-shaped bracket 38 is fastened to the upper surface 34A of the first ceiling beam 34 . A first roof frame 46 constituting the flat roof 20 is fixed to the first L-shaped bracket 38 .

A first joist 50 is provided on the lower surface 34B of the first ceiling beam 34 . The first joist 50 is overlaid on the lower side of the first ceiling girders 34 , and the first ceiling base material 54 is overlaid on the lower surface of the first joist 50 . The first joists 50 and the first ceiling base material 54 are fixed to the first ceiling girders 34 .

A second ceiling girder 36 is arranged in the second building unit 14 so as to face the first ceiling girder 34 . The second ceiling girders 36 are formed of channel steel with a substantially U-shaped cross section that is open on the side opposite to the first building unit 12 side. 44 is attached. One end of a second ceiling beam 45 is fixed to the second mounting bracket 44 . The second ceiling girders 45 extend in the Y direction, and the other ends of the second ceiling girders 45 are fixed to ceiling girders (not shown) arranged substantially parallel to the second ceiling girders 36. there is

A second L-shaped bracket 40 is fastened to the upper surface 36A of the second ceiling girder 36, and a second roof frame 48 constituting the flat roof 20 is fixed to the second L-shaped bracket 40. As shown in FIG. A second ceiling joist 52 is provided on the lower surface 36B of the second ceiling girder 36 . The second joist 52 is overlaid on the lower side of the second ceiling girders 36 , and the second ceiling base material 56 is overlaid on the lower surface of the second joist 52 . A second ceiling joist 52 and a second ceiling base material 56 are fixed to the second ceiling girders 36 . Further, a wall surface 58 on the living room side is provided on the indoor side of the front wall 24 of the second building unit 14 .

Here, a first extending portion 51 is provided on the first joist 50 . The first extending portion 51 extends from the first joist 50 toward the opposing second joist 52 side, and protrudes from the first ceiling girder 34 toward the docking line DL. In addition, the first extending portion 51 extends in the X direction to the outer peripheral portion of the building 10 together with the first joist 50 .

On the other hand, the second joist 52 is provided with a second extending portion 53 . The second extending portion 53 extends from the second joist 52 toward the opposing first joist 50 side, and protrudes from the second ceiling girder 36 toward the docking line DL. In addition, the second extending portion 53 extends in the X direction to the outer peripheral portion of the building 10 together with the second joist 52 .

Since the first extending portion 51 and the second extending portion 53 are formed at the same height, the upper surface of the first extending portion 51 and the upper surface of the second extending portion 53 are positioned at substantially the same height. are doing. Furthermore, a connecting member 57 is arranged between the first extending portion 51 and the second extending portion 53 , and the connecting member 57 is connected to the first extending portion 51 and the second extending portion 53 . are closely related.

An airtight member 60 is superimposed on the upper surface of the first extending portion 51 and the upper surface of the second extending portion 53 . The airtight member 60 is formed of a plate-like member whose plate thickness direction is the vertical direction, and extends in the X direction.

As shown in FIG. 3, the airtight member 60 of this embodiment has one end in the X direction that extends from the sleeve wall 22 to the indoor space S2 side. Although not shown, the other end of the airtight member 60 in the X direction extends to the outer periphery of the building 10 together with the first ceiling girders 34 and the second ceiling girders 36 . By disposing the airtight member 60 in this manner, the gap between the first ceiling girders 34 and the second ceiling girders 36 in the ceiling of the indoor space S1 is closed. That is, the airtight member 60 covers the opening H (see FIGS. 4 and 5) between the first joist 50 and the second joist 52 from above.

A ceiling joint member 62 is arranged on the lower surface of the connecting member 57 . The ceiling joint material 62 is arranged so as to close the gap between the first ceiling base material 54 of the first building unit 12 and the second ceiling base material 56 of the second building unit 14 . The connecting member 57 is sandwiched between the airtight member 60 and the ceiling joint member 62 .

As shown in FIG. 3, the ceiling joint material 62 is arranged so as to be inserted from the indoor space S2 side to the semi-outdoor space S1 side.

(Method for assembling airtight member 60)
Next, a method for assembling the airtight member 60 according to this embodiment will be described.

First, as shown in FIG. 4, the first extending portion 51 is attached to the docking line DL side surface of the first joist 50 in the first building unit 12 . Also, the second extending portion 53 is attached to the surface of the second joist 52 of the second building unit 14 on the side of the docking line DL. At this time, FIG. 4 shows the ceiling plate 69 forming the ceiling on the semi-outdoor space S1 side, and this ceiling plate 69 is attached after the airtight member 60 is assembled. Therefore, the work for attaching the first extending portion 51 and the second extending portion 53 can be performed through the gap between the first ceiling base material 54 and the front wall 24 . Either the first extension portion 51 or the second extension portion 53 may be attached first.

Next, as shown in FIG. 5, the airtight member 60 is overlaid on the first extending portion 51 and the second extending portion 53 . Specifically, from above the first ceiling girders 34 and the second ceiling girders 36, the airtight member 60 is passed between the first ceiling girders 34 and the second ceiling girders 36, and the first extending portion 51 and the second extending portion It is placed on the part 53 . After that, the airtight member 60 is fixed to the first extending portion 51 and the second extending portion 53 with screws or the like. By fixing the airtight member 60 on the first extending portion 51 and the second extending portion 53 in this manner, the opening H between the first joist 50 and the second joist 52 is covered from above. .

Subsequently, as shown in FIGS. 2 and 3, the ceiling joint material 62 is arranged between the first ceiling base material 54 and the second ceiling base material 56 . By arranging the ceiling joint member 62 so as to be inserted from the indoor space S2 side to the semi-outdoor space S1 side, work can be performed in the indoor space S2 side. In addition, the connecting member 57 is attached in advance to the end of the ceiling joint material 62, and in this state, the ceiling joint material 62 is inserted into the gap between the first ceiling base material 54 and the second ceiling base material 56, whereby the connecting member 57 is sandwiched between the airtight member 60 and the ceiling joint material 62 . Note that the connecting member 57 may be attached to the lower surface of the airtight member 60 in advance.

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

In the building 10 to which the airtight structure according to the present embodiment is applied, the first extension portion 51 and the second extension portion 53 are extended from the first joist 50 and the second joist 52 to the opposing joist side. An airtight member 60 is superimposed on the first extending portion 51 and the second extending portion 53 . The airtight member 60 covers the opening H between the first joist 50 and the second joist 52 from above. As a result, upward ventilation from the semi-outdoor space S1 to the flat roof 20 can be suppressed.

The above effect will be described with reference to a comparative example shown in FIG. In addition, in the following description, the same reference numerals are given to the same configurations as in the embodiment, and the description thereof will be omitted as appropriate.

As shown in FIG. 6, the airtight member 60 is not installed in the building 100 of the comparative example. Therefore, in the building 100 of the comparative example, as indicated by the arrow W in FIG. 34 and the second ceiling girders 36. Since the outside air is ventilated to the inner space of the flat roof 20 above the first ceiling girders 34 and the second ceiling girders 36, the heat insulating effect of the ceiling section in the second building unit 14 in particular cannot be obtained.

On the other hand, in the present embodiment, as shown in FIG. 2, the airtight member 60, the connecting member 57, and the ceiling joint member 62 suppress ventilation between the ceiling portion of the semi-outdoor space S1 and the flat roof 20. ing. As a result, it is possible to prevent outside air from flowing into the flat roof 20 .

Further, in this embodiment, as shown in FIG. 3, the airtight member 60 extends from the sleeve wall 22 to the indoor space S2 side, so the airtight member 60 is arranged only up to the sleeve wall 22. Airflow can be reliably suppressed as compared with a structure without the structure.

Furthermore, as shown in FIG. 2, in this embodiment, the ceiling joint member 62 closes the gap between the first ceiling base member 54 and the first ceiling base member 56, and the connecting member 57 closes the ceiling joint member. The gap between 62 and the airtight member 60 is closed. Therefore, it is possible to suppress ventilation from the semi-outdoor space S1 to the flat roof 20 while preventing ventilation between the semi-outdoor space S1 and the indoor space S2.

Furthermore, in this embodiment, by attaching the first extending portion 51 to the first joist 50 and attaching the second extending portion 53 to the second joist 52, the front wall 24 does not interfere with each other. can be extended. Moreover, general-purpose components can be used as the first joist 50 and the second joist 52 .

Further, by overlapping the airtight member 60 on the first extending portion 51 and the second extending portion 53, even in the structure in which the front wall 24 is provided, the first joist 50 and the second joist can be 52 can be blocked to suppress ventilation to the flat roof 20. - 特許庁

Although the airtight structure of the building 10 according to the embodiment has been described above, it is needless to say that it can be implemented in various forms without departing from the gist of the present invention. For example, in the above-described embodiment, the first extending portion 51 is attached to the first joist 50 and the second extending portion 53 is attached to the second joist 52, but the present invention is not limited to this. A joist having a longer length in the Y direction than the first joist 50 may be prepared, and a part of the joist may be formed so as to protrude from the first ceiling girders 34 . In this case, the projecting portion corresponds to the "first extending portion" of the present invention. Similarly, for the second joist 52, a joist having a longer length in the Y direction than the second joist 52 is prepared, and a part of the joist is formed so as to protrude from the second ceiling girders 36. good too. In this case, the projecting portion corresponds to the "second extension" of the present invention. However, from the viewpoint of suppressing an increase in cost, it is preferable to use general-purpose first joist 50 and second joist 52 without manufacturing dedicated parts.

In the above embodiment, the first extending portion 51 is attached to the first joist 50, and the second extending portion 53 is attached to the second joist 52. And it is good also as a structure which extended the extension part from one of the 2nd joists 52 to the facing joist side. For example, the first extending portion 51 may be attached to the first joist 50 and the second extending portion 53 may not be attached to the second joist 52 . In this case, the airtight member 60 may be directly fixed to the second ceiling joist 52 by bending downward the end of the airtight member 60 on the side of the second ceiling girders 36 .

10 Building 12 First building unit 14 Second building unit 20 Flat roof 22 Side wall 24 Front wall 34 First ceiling beam 36 Second ceiling beam 50 First joist 51 First extension 52 Second joist 53 Second extension Extension part 54 First ceiling base material 56 Second ceiling base material 57 Connecting member 60 Airtight member 62 Ceiling joint material H Opening S1 Semi-outdoor space S2 Indoor space

Claims (3)

a first building unit provided under a flat roof and provided with a wing wall that separates a semi-outdoor space from an indoor space;
a second building unit provided below the flat roof adjacent to the first building unit and having a front wall at the boundary with the semi-outdoor space;
a first joist superimposed below the first ceiling girders arranged along the boundary portion of the first building unit;
a second joist superimposed below the second ceiling girders disposed facing the first ceiling girders in the second building unit;
an extending portion extending from at least one of the first joist and the second joist to the opposing joist side;
an airtight member superimposed on the extension and covering from above an opening between the first joist and the second joist;
airtight structure of the building with 2. The airtight structure of the building according to claim 1, wherein the airtight member extends from the outer periphery of the building to the side of the indoor space beyond the sleeve wall. a first building unit provided under a flat roof and provided with a wing wall that separates a semi-outdoor space from an indoor space; and a second building unit having a front wall at the boundary with the space, and a method for disposing an airtight member in a building comprising:
a step of installing a first extending portion extending from a first joist superimposed under a first ceiling girder arranged along the boundary portion of the first building unit toward the second building unit; ,
A second extending portion extending toward the first building unit from a second joist superimposed below the second ceiling girders disposed facing the first ceiling girders in the second building unit. a step of installing;
A step of overlapping an airtight member on the first extending portion and the second extending portion to cover the opening between the first joist and the second joist from above;
A method for assembling an airtight member.

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