JP2023068369A - Ceiling base member, ceiling structure, building, and construction method of building - Google Patents

Abstract

To provide a ceiling base member capable of improving workability for attaching an airtight member so as to straddle between ceiling joist receivers.SOLUTION: A ceiling base member for a building comprises: a ceiling joist receiver which extends in a first direction and to which a hanging member can be connected; and a base airtight member having a covering portion adhered to an upper surface of the ceiling joist receiver via an adhesive layer so as to cover the whole of the upper surface of the ceiling joist receiver and at least one extension portion extending from the covering portion in at least one of second directions perpendicular to the first direction and extending in the first direction along the covering portion.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling base member, a ceiling structure, a building, and a method for constructing a building.

Conventionally, in a building with an attic, airtight sheets and moisture-proof sheets (hereinafter collectively referred to as "airtight sheets") are provided along the upper surface of the ceiling board to keep the interior airtight against the outside air. There is

In such a building, when wiring such as ducts and electric wires is installed on the ceiling board and airtight sheet, it is necessary to make holes in multiple places in the airtight sheet in order to introduce the wiring into the room. rice field. As a result, the airtightness of the room deteriorates due to these holes, and in winter, highly humid air flows out from the room onto the airtight sheet, and the humid air is cooled on the airtight sheet, resulting in condensation. rice field.

Here, conventionally, there has been proposed a building in which a gap is formed between the ceiling board and the airtight sheet. For example, in Patent Document 1, a plurality of joist receivers (suspension beams provided between two crosspieces and crosspieces), a joist provided on the lower surface of the joist receiver, and a joist on the lower surface of the joist A building is disclosed which includes a ceiling board provided and a sheet provided so as to straddle the upper surfaces of a plurality of ceiling joist supports, and a gap is formed between the ceiling board and the sheet.

In such buildings, wiring can be provided between the ceiling board and the airtight sheet. When wiring is provided between the ceiling board and the airtight sheet, the number of holes to be provided in the airtight sheet can be reduced when the wiring is introduced into the room.

On the other hand, in order to lead the wiring between the ceiling board and the airtight sheet to the outside of the airtight sheet, it is necessary to make a hole in the airtight sheet. However, since the wiring provided on the ceiling board generally has more parts that are led to the indoor side than the part that is led to the outside of the airtight sheet, in the configuration described in Patent Document 1, the wiring is airtight along the upper surface of the ceiling board. Compared to the case where a sheet is provided, the number of holes provided in the airtight sheet can be reduced, and a good indoor airtight state can be maintained.

JP-A-9-111946

However, the building disclosed in Patent Literature 1 is attached with ceiling joists using a special construction method.

Specifically, when constructing the building disclosed in Patent Document 1, a sheet having a plurality of ceiling joist supports attached in parallel to the lower surface of the sheet is prepared in advance, and the sheet is folded into a waveform to form a ceiling joist support. are put together. A plurality of joist receivers gathered together with the sheet are supported on the joist attached to the wall. Next, by stretching the sheet, the ceiling joist receivers are moved along the ceiling joists to arrange the ceiling joist receivers at predetermined intervals.

Thus, in the building disclosed in Patent Document 1, it is necessary to collectively lift a plurality of ceiling joist supports gathered together with the sheet at the time of construction, and workability is poor.

The present invention has been made in view of such problems, and is a ceiling base member that can improve workability when installing an airtight sheet (airtight member) so as to straddle between ceiling joist receivers. intended to provide Another object of the present invention is to provide a ceiling structure and a building having such a ceiling base member, and to provide a construction method for a building with high workability.

As a result of various studies, the inventors of the present invention have found that the above objects are achieved by the following inventions.

A ceiling base member according to one aspect of the present invention is a ceiling base member for a building, which extends in a first direction and is connectable to a ceiling joist receiver and a ceiling joist receiver. A covering portion adhered to the upper surface of the ceiling joist receiver via an adhesive layer so as to cover the entirety, and extending from the covering portion in at least one of a second direction orthogonal to the first direction and to the covering portion and at least one extending portion extending along the first direction.

A construction method for a building according to another aspect of the present invention is a construction method for a building using the above ceiling base member, wherein the two hanging members are installed at predetermined positions in the building. Before or after the step of attaching and the step of attaching the two hanging members, a step of connecting the two hanging members to the joist receivers, and a step of attaching the two hanging members and the joist receivers. By the step of connecting, the base airtight member of one of the two ceiling base members extending in the first direction and spaced apart from each other in the second direction. and providing an inter-floor airtight member between the other ceiling base member and the base airtight member.

In the above ceiling base member, since the entire upper surface of the ceiling joist receiver is covered with the covering part, the base airtightness in the two ceiling base members suspended by the suspension member while being separated from each other in the second direction An airtight line can be formed between the two members for the ceiling base by attaching the airtight member between bases so as to straddle the members. Therefore, compared to the case where a plurality of joist receivers gathered together with the sheet are lifted together on the joist joist like the building disclosed in Patent Document 1, the airtight member is placed so as to straddle between the joist receivers. Workability for mounting can be improved.

Furthermore, since the base airtight member has an extending portion extending in at least one of the second directions, when attaching the base airtight member to the ceiling base member, the extending portion separated from the suspension member can be easily attached to the base airtight member. An inter-underfloor airtight member can be attached to the

If a side airtight member is attached to the base airtight member so as to extend from one of the two ceiling base members to the opposite side of the other ceiling base member, the two ceiling base members are also airtight in the directions away from each other. You can extend the line.

In addition, in the above-mentioned ceiling base member, the adhesive layer allows the base airtight member to be attached to the predetermined position of the ceiling joist receiver, so that the operator can attach the base airtight member to the predetermined position of the ceiling joist receiver. There is no need to hold it, and workability for connecting the ceiling base member to the hanging member can be improved.

In the above ceiling base member, the ceiling support has an upper surface formed with a connected portion to which the hanging member can be connected, and the covering portion can form a through hole communicating with the connected portion. It may be adhered to the upper surface of the ceiling joist receiver so as to cover the connected portion in the state.

In this aspect, the joist receiver can be easily connected to the hanging member by providing the through hole in the connected portion of the base airtight member.

In the ceiling base member described above, the base airtight member may have two extending portions extending from the covering portion to both sides in the second direction.

In this aspect, since the airtight member can be connected to the base airtight member at positions away from the hanging member on both sides of the covering portion of the base airtight member in the second direction, the base airtight member can be connected to the base airtight member (for example, , airtight member between bases) can be improved.

A ceiling structure according to another aspect of the present invention is a ceiling structure of a building, comprising: two suspension members extending in the first direction and spaced apart in the second direction; Two ceiling base members according to claim 1 or claim 2 respectively suspended by the suspension members, extending in the second direction, connected to the lower part of the ceiling joist receiver, and attached to the ceiling plate material a plurality of ceiling joists, the base airtight member of one of the ceiling base members, and the base airtight member of the other ceiling base member provided between the base airtight members; have

As described above, for two ceiling base members in which an airtight member (inter-base airtight member) is connected to a base airtight member with high workability, from the base airtight member of one ceiling base member to the other base airtight member The airtight line can be extended in the second direction by further providing a side airtight member so as to extend on the opposite side of the ceiling base member. The side airtight member may be connected to another adjacent ceiling base member, or may be connected to an airtight layer provided on the wall. Specifically, with the following configuration, the side airtight member can be connected to the airtight layer provided on the wall.

A building according to another aspect of the present invention includes the above-described ceiling structure, and a wall body having an airtight layer provided under the ceiling structure, and the ceiling structure includes one of the ceiling base members a side airtight member extending from the base airtight member to the opposite side of the other ceiling base member; The end opposite to the end connected to the base airtight member is connected to the airtight layer.

In the building described above, the airtight layer of the wall and the side airtight members can be connected in the second direction.

In the building described above, the airtight layer of the wall includes an airtight sheet provided along the wall, a wall-side connecting portion extending upward from the upper end of the airtight sheet, and the wall at the wall-side connecting portion. a connecting member extending from a portion above the lower surface of the edge support toward the interior of the room and connected to the side airtight member.

According to this aspect, at least one end of the side airtight member in the second direction can be arranged above the ceiling joist (above the lower surface of the ceiling joist holder), so that the side airtight member and the ceiling plate material A space for arranging wiring and the like can be secured between them.

ADVANTAGE OF THE INVENTION According to this invention, the member for ceiling foundations which can improve the workability for attaching an airtight member so that it may straddle between ceiling-belt receivers can be provided. Further, according to the present invention, it is possible to provide a ceiling structure and a building having such a ceiling base member, and to provide a building construction method with high workability.

FIG. 1 is a schematic diagram of a cross-sectional view of a building according to one embodiment of the present invention, viewed from a first direction. FIG. 2 is an enlarged cross-sectional view of a portion surrounded by a dashed-dotted line II in FIG. FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG. FIG. 4 is a perspective view of the ceiling structure of the lower roof of the building shown in FIG. 1, looking up from below. 5 is an exploded perspective view of the ceiling base member shown in FIG. 4. FIG. FIG. 6 is a perspective view showing a state when the upper end of the portion extending in the second direction of the wall of the lower compartment shown in FIG. 3 and its surroundings are viewed from below. FIG. 7 is a perspective view showing a state when the upper end of the portion of the wall of the lower compartment shown in FIG. 2 extending in the first direction and its surroundings are viewed from below. FIG. 8 is a diagram showing a state in the middle of construction of the ceiling structure shown in FIG. 4, and is a perspective view looking up from below showing a state in which the ceiling joist is attached to the ceiling base member. 9 is a perspective view showing a state in which an inter-floor airtight member is attached to the base airtight member and a state in which the side airtight member is attached in the ceiling base member shown in FIG. 10 is a perspective view showing a state in which reinforcing tapes are attached between the base airtight member, the inter-base airtight member and the side airtight member shown in FIG. 9. FIG. 11 is a perspective view showing a state in which a reinforcing tape is attached between the ceiling-side connecting portion of the connecting member shown in FIGS. 5 and 6 and the side airtight member shown in FIG. 9. FIG. FIG. 12 is a perspective view showing a state in which the wiring on the inter-floor airtight member is introduced into the room. FIG. 13 is a perspective view showing a state in which the inter-floor airtight member is repaired.

BEST MODE FOR CARRYING OUT THE INVENTION A ceiling substrate member, a ceiling structure, a building, and a construction method for a building according to an embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the direction normal to the paper surface of FIG. Of the first direction X, the depth direction of the paper surface of FIG. 1 is +X direction, and the front direction is -X direction, and of the second direction Y, the right direction in FIG. 1 is +Y direction, and the left direction is -Y direction. and

FIG. 1 is a schematic cross-sectional view of a building according to the present embodiment viewed from a first direction, and FIG. 2 is an enlarged cross-sectional view of a portion surrounded by a dashed line II in FIG. FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG. FIG. 4 is a perspective view of the ceiling structure of the lower roof of the building shown in FIG. 1, looking up from below, and FIG.

As shown in FIG. 1, a building 1 has a lower floor section 1a with a first floor space formed under the roof, and a total two-story section 1b with a first floor space and a second floor space formed under the roof. , and has an airtight line 2 provided so as to wrap the entire interior of the building 1. The airtight line 2 includes a ceiling structure 30 in the lower floor portion 1a, a second floor ceiling structure 1b1 in the total second floor portion 1b, a wall 50 of the lower floor portion 1a surrounding the outer periphery of the room in the building 1, and the total second floor portion 1b. , and airtight members such as airtight sheets provided on each of the floors 1c on the first floor are connected to each other.

The building 1 has a structural frame and attached members attached to the structural frame.

As shown in FIGS. 1 to 3, the structural framework includes a plurality of beams (two beams 3a and 3b in FIGS. 1 and 2) extending in the first direction X above the ceiling structure 30 of the lower floor 1a. ) and a plurality of beams (only one beam 3c is shown in FIG. 3) extending in the second direction Y in the upper part of the ceiling structure 30 . The beam 3a extends in the first direction X on the wall 50 of the lower roof portion 1a. The beam 3b extends in the first direction X at the boundary portion between the lower floor section 1a and the total second floor section 1b (below the second floor wall 60 of the total second floor section 1b) and extends in the second direction Y between the beam 3a and the second floor section 1b. Oppose. Although not shown, at least one beam extending in the first direction X is provided between the beams 3a and 3b. As shown in FIG. 3, the beam 3c extends in the second direction Y so as to connect the beams 3a and 3b. Hereinafter, the beams 3a to 3c and the beams not shown are collectively referred to as the beams 3. As shown in FIG. The beam 3 is made of H-shaped steel. Note that the beam 3 may be made of a member other than the H-shaped steel (for example, a square bar) as long as the suspension member 4 described later can be connected.

As shown in FIGS. 1 to 3, the attachment members include the ceiling structure 30 of the lower floor 1a, the wall 50 of the lower floor 1a, and the second floor wall 60 of the total second floor 1b. The wall 50 of the lower roof section 1a has an X portion 50a extending in the first direction X shown in FIGS. 1 and 2 and a Y portion 50b extending in the second direction Y shown in FIG.

2 and 4, the ceiling structure 30 extends in the first direction X and is spaced apart in the second direction Y from the plurality of suspension members 4 suspended from the plurality of beams 3. A plurality of ceiling base members 10 respectively suspended by hanging members 4, a ceiling base member 31 attached to the lower part of the ceiling base member 10, and a base provided between the ceiling base members 10 A space airtight member 14, a plurality of side airtight members 15 provided so as to extend from one ceiling base member 10 to the opposite side of the other ceiling base member 10, and a beam 3b side (+Y direction side) side A beam-side airtight sheet 16 provided to extend upward from the end of the side airtight member 15, a ceiling plate member 32 provided on the lower surface of the ceiling joist 31, a ceiling base member 10, an airtight member 14 between bases, and a side and a heat insulating material 35 provided on the side airtight member 15 .

As shown in FIG. 2, the hanging members 4 are attached to the beams 3b at the boundary between the lower floor 1a and the total second floor 1b and to the beams 3 (not shown) between the beams 3a and 3b. In addition, the inter-substrate airtight member 14 includes an airtight member provided between the suspension member 4 shown in FIG. 2 and the suspension member 4 (not shown). It includes an airtight member extending to the wall 50 and an airtight member extending from the illustrated hanging member 4 to the beam-side airtight sheet 16 .

As shown in FIGS. 2 and 5, the hanging member 4 includes a hanging rod 4a having a male thread formed on the surface thereof, and a female screw 2 formed to be attached to the hanging rod 4a and screwed to the hanging rod 4a. and a support member 4c attached to the lower flange of the beam 3b and supporting the upper end of the suspension rod 4a. Note that the support member 4c may be attached to the upper flange of the beam 3b.

As shown in FIG. 5, the ceiling base member 10 includes a ceiling joist receiver 11 extending in the first direction X, a base airtight member 12 provided on the upper surface 11b1 of the ceiling joist receiver 11, and the joist receiver 11. and a joist fixing member 13 for connecting with the joist 31 .

The joist receiver 11 has a top plate 11b, a bottom plate 11c, and side plates 11d connecting the top plate 11b and the bottom plate 11c. Moreover, the joist receiver 11 is connectable with the suspension member 4 and has an upper surface 11b1 formed with a plurality of holes 11a (connected portions) for connecting the suspension member 4 . Specifically, the top plate 11b is formed with a plurality of holes 11a penetrating the top plate 11b in the vertical direction. The hanging rod 4a extends from the top of the top plate 11b to the bottom of the top plate 11b through the hole 11a, and the fixing member 4b provided on the top plate 11b and the fixing member 4b provided below the top plate 11b are connected. The suspension rod 4a is fixed to the ceiling joist receiver 11 by sandwiching the top plate 11b therebetween. The top plate 11b and the bottom plate 11c are connected by a side plate 11d at an end portion on the +Y direction side in the second Y direction. A joist fixing member 13 is attached to the bottom plate 11c.

The underlayer airtight member 12 includes a covering portion 12a adhered to the upper surface 11b1 of the joist receiver 11, and extends from the covering portion 12a to both sides in a second direction Y orthogonal to the first direction X and along the covering portion 12a. and an extension portion 12b extending in the first direction X.

The base airtight member 12 is a member having airtightness, and is made of, for example, a foamed sheet. An adhesive layer 12a2 is provided on the surface of the covering portion 12a that is adhered to the joist receiver 11. As shown in FIG. The adhesive layer 12a2 is covered with a release paper 12d before the covering portion 12a is adhered to the joist receiver 11. As shown in FIG. The covering portion 12a is adhered to the ceiling joist receiver 11 with the release paper 12d removed.

The covering portion 12a is adhered to the upper surface 11b1 of the joist receiver 11 via an adhesive layer 12a2 so as to close the plurality of holes 11a of the upper surface 11b1 of the joist receiver 11 and cover the entire upper surface 11b1 of the joist receiver 11. ing. The covering portion 12a is formed so as to form a through hole 12a1 communicating with the hole 11a when an operator pushes the end of the suspension rod 4a from the portion above the hole 11a of the joist receiver 11 in the covering portion 12a. material and thickness are set. The covering portion 12a is preferably made of, for example, polyethylene foam and has a thickness of 1 to 4 mm.

As shown in FIG. 5, a through hole 12a1 communicating with the hole 11a of the upper surface 11b1 of the ceiling joist receiver 11 is formed in the cover portion 12a in the portion of the ceiling base member 10 that is suspended by the suspension member 4. . In addition, the covering portion 12a is sandwiched by the fixing member 4b in a state of being in close contact with the top plate 11b of the ceiling joist receiver 11. As shown in FIG. This restricts the flow of gas between the covering portion 12a and the top plate 11b.

The through-hole 12a1 may be formed in advance before the ceiling base member 10 with the base airtight member 12 attached to the ceiling joist receiver 11 is carried into the construction site of the building 1. may be formed with The through hole 12a1 is not formed in the portion of the covering portion 12a facing the hole 11a that is not suspended by the hanging member 4, and the hole 11a is kept covered by the covering portion 12a.

The inter-floor airtight member 14, the side airtight member 15, and the beam-side airtight sheet 16 are all airtight members, for example, sheets made of soft resin. The inter-underfloor airtight member 14, the side airtight member 15, and the beam-side airtight sheet 16 can all be made of the same sheet material.

As shown in FIG. 4 , the inter-underfloor airtight member 14 is provided between two ceiling underfloor members 10 aligned in the second direction Y. As shown in FIG. The side airtight member 15 extends from the ceiling base member 10 on the -Y direction side in FIG. and a member extending from the ceiling base member 10 on the +Y direction side toward the wall body 60 (+Y direction) (hereinafter referred to as +Y side airtight member 15B).

Specifically, as shown in FIG. 2, the -Y side airtight member 15A extends in the -Y direction and is connected to a connection member 55 of the wall body 50, which will be described later. In addition, the +Y side airtight member 15B extends to a position on the +Y direction side of the beam 3b at the boundary portion between the lower floor section 1a and the total second floor section 1b. The beam-side airtight sheet 16 is connected to the +Y side airtight member 15B with an adhesive tape or an adhesive, and extends upward to a floor body 70, which will be described later.

In this embodiment, the inter-base airtight member 14 and the side airtight member 15 are both attached to the extending portion 12 b of the base airtight member 12 . Specifically, the inter-base airtight member 14 and the lateral airtight member 15 are attached to the extending portion 12b via an adhesive layer provided on the upper surface of the extending portion 12b. In this way, the base airtight member 12, the inter-basement airtight member 14, and the side airtight member 15 are connected, and together with the beam-side airtight sheet 16, form a part of the airtight line 2 in the ceiling structure 30 portion of the lower roof section 1a. do. The inter-floor airtight member 14 and the side airtight member 15 may be attached to the extension 12b with an adhesive. Moreover, when there is no attic space above the ceiling structure 30 or when it is narrow, the airtight member 14 between bases and the side airtight member 15 are preferably attached to the lower surface of the extension 12b. In this case as well, the inter-underfloor airtight member 14 and the side airtight member 15 can be attached to the extension 12b by means of an adhesive layer or adhesive provided on the lower surface of the extension 12b.

In the ceiling structure of the present embodiment, as shown in FIG. 4 and FIG. 10 to be described later, a reinforcing tape 17a is provided so as to straddle the base airtight member 12 and the inter-base airtight member 14. Airtightness is ensured between the member 12 and the inter-floor airtight member 14 . The base airtight member 12 and the side airtight members 15 are similarly provided with reinforcing tapes 17a. When attaching the inter-base airtight member 14 and the side airtight member 15 to the lower surface of the extending portion 12b, if sufficient attachment strength can be ensured using the adhesive layer provided on the lower surface of the extending portion 12b, , the reinforcing tape 17a can be omitted.

As shown in FIGS. 2 to 4, the joist 31 is a rectangular cylindrical member extending in the second direction Y, and has a fitted portion 31a near its upper end. The joist 31 is attached to the lower part of the joist receiver 11 by fitting the joist fixing member 13 to the fitted portion 31a.

The heat insulating material 35 is a soft fiber-based heat insulating material made of glass wool or the like, and extends from the beam 3a to the position between the beam 3b and the beam-side airtight sheet 16 above the inter-base airtight member 14 and the side airtight member 15. It is provided along the ceiling plate material 32 .

The ceiling plate material 32 is a plate material made of gypsum board or the like, and is attached to the lower surface of the ceiling joist 31 with screws or the like (not shown).

The heat insulating material 35 is a soft fiber-based heat insulating material made of glass wool or the like, and extends from the beam 3a to the position between the beam 3b and the beam-side airtight sheet 16 above the inter-base airtight member 14 and the side airtight member 15. It is provided along the ceiling plate material 32 .

2 and 4, in the building 1 of this embodiment, in the ceiling structure 30, between the joists 31 and the inter-underfloor airtight member 14 or the side airtight member 15, that is, the airtight line 2 has a wiring 81 provided inside.

Next, the wall 50 of the lower roof section 1a will be described. As described above, the wall 50 of the lower roof portion 1a has an X portion 50a extending in the first direction X (see FIG. 2) and a Y portion 50b extending in the second direction Y (see FIG. 3).

As shown in FIG. 2, the X portion 50a includes an inner wall frame 52 having horizontal bars 52a and vertical bars 52b, and an airtight sheet 54 provided along the inner wall frame 52 (the +Y direction side). , an inner wall plate 51 provided along the indoor side surface of the airtight sheet 54, a connecting member 55 connected to the upper end of the airtight sheet 54, and an end of the joist 31 provided on the indoor side of the connecting member 55 An inner wall runner 57 (see also FIG. 7 described later) for positioning the part, a frame 59 provided below the beam 3a, and the outdoor side surface of the frame 59 (surface on the -Y direction side). and a fiber-based heat insulating material 56 made of glass wool or the like provided between the inner wall frame 52 and the outer wall plate 50c. The airtight sheet 54 and the connecting member 55 are connected to each other to form an airtight layer of the wall 50 , that is, part of the airtight line 2 . As shown in FIG. 3, the Y portion 50b has the same configuration as the X portion 50a except for the inner wall runner 57. As shown in FIG.

The connecting member 55 includes a wall-side connecting portion 55a extending upward from the upper end of the airtight sheet 54, and a portion of the wall-side connecting portion 55a above the lower surface of the ceiling joist receiver 11. and a ceiling-side connection portion 55 b connected to the airtight member 15 . Thereby, the wall 50 portion of the lower roof portion 1a of the airtight line 2 and the ceiling structure 30 portion are connected.

The inner wall runner 57 extends in the first direction X, opens in the second direction Y, and has a groove into which the ends of the joists 31 are inserted.

Next, the second-floor wall body 60 and its periphery in the total second-floor section 1b will be described. As shown in FIG. 2, the total second floor portion 1b includes a second floor wall 60 and a second floor floor 70 provided on the beams 3b at the boundary between the lower floor portion 1a and the total second floor portion 1b. and

The floor body 70 includes a plate-shaped floor material 71 supported by the beams 3b at the outdoor end (the end in the -Y direction), and the outdoor side of the floor material 71 from the upper surface to the lower surface of the floor material 71. and a floor material airtight sheet 72 provided to cover the end. The airtight flooring sheet 72 is connected to the upper end of the beam-side airtight sheet 16 at its lower portion.

The wall 60 of the second floor is provided along an inner wall frame 62 provided on the floor 70 and the surface of the inner wall frame 62 on the indoor side (surface on the +Y direction side), and is connected to the floor material airtight sheet 72. an airtight sheet 63, an inner wall plate member 64 provided along the indoor side surface of the airtight sheet 63, a framework 65 provided above the beam 3b, and an outdoor side surface (-Y direction) of the inner wall frame 62. and a fiber-based heat insulating material 66 made of glass wool or the like provided along the side surface. The lower end of the airtight sheet 63 is connected to the upper portion of the floor material airtight sheet 72 . By connecting the airtight sheet 63 and the floor material airtight sheet 72 in this order, a part of the airtight line 2 is formed from the ceiling structure 30 of the lower floor 1a to the wall 60 of the second floor. be.

Next, a method for constructing a ceiling structure and a building 1 using the ceiling substrate member 10 according to the present embodiment will be described.

The construction method according to this embodiment has the following steps (1) to (9). In step (1), two suspension members 4 are attached to predetermined positions in a building. In step (2), the two suspension members 4 are connected to the joist receivers 11 in a state in which the suspension members 4 pass through the base airtight member 12 . In step (3), the connecting member 55 and the inner wall runner 57 are attached to the upper end portion of the wall 50 . In step (4), the joists 31 are attached to the ceiling base member 10 . In step (5), a heat insulating material 35 is arranged on the ceiling base member 10 and the ceiling joists 31 . In step (6), the wiring 80 connected to the transmission line is placed on the heat insulating material 35 . In step (7), the wiring 81 is arranged between the heat insulating material 35 and the joist 31 . In step (8), a base airtight member 14 is provided between the base airtight member 12 of one ceiling base member 10 and the base airtight member 12 of the other ceiling base member 10 . In step (9), side airtight members 15 are attached to one ceiling base member 10 so as to extend from the base airtight member 12 of one ceiling base member 10 to the opposite side of the other ceiling base member 10 .

6 is a perspective view showing the upper end of the Y portion 50b of the wall 50 shown in FIG. 3 and its surroundings, and FIG. 7 is a perspective view showing the upper end of the X portion 50a shown in FIG. 2 and its surroundings when viewed from below. be. FIG. 8 is a diagram showing a state in the middle of construction of the ceiling structure shown in FIG.

In step (1), a plurality of hanging members 4 are attached to predetermined positions in a building. Specifically, the plurality of hanging members 4 are attached to predetermined positions of the beam 3 as shown in FIG.

In step (2), as shown in FIGS. 5 and 6, a plurality of suspension members 4 attached to beams 3 are connected to joist receivers 11, respectively. Through steps (1) and (2), a plurality of ceiling base members 10 are arranged to extend in the first direction X and to be spaced apart from each other in the second direction Y, as shown in FIG.

In step (3), as shown in FIGS. 6 and 7, connecting members 55 are attached to the upper ends (horizontal beams 52a) of the inner wall frame 52 by screws 58 on both the X portion 50a and the Y portion 50b of the wall body 50. . At this time, the connection member 55 is arranged such that the ceiling side connection portion 55b extends toward the interior of the room from a portion of the wall side connection portion 55a of the connection member 55 that is above the lower surface of the ceiling joist receiver 11 . Further, as shown in FIG. 7, the inner wall runner 57 is fixed to the X-axis of the wall 50 by screws 58 while the inner wall runner 57 is positioned at a height preset as the height for positioning the ends of the joists 31 . Attach to portion 50a.

In step (4), as shown in FIGS. 6 and 8, the wall 50 or the lower surface of the ceiling base member 10 extends in the second direction Y and is spaced apart in the first direction X. A plurality of joists 31 are attached in such a state that they are arranged. The hem 31 at the end in the -X direction is attached to the Y portion 50b of the wall 50 with screws 58, as shown in FIG. The other joists 31 are attached to the lower surface of the joist receiver 11 of the ceiling base member 10 via the joist fixing member 13, as shown in FIG. The ends of the joists 31 in the second direction Y are inserted into the grooves of the inner wall runners 57 as shown in FIG. The −X-direction end of the ceiling base member 10 is arranged between the ceiling-side connecting portion 55b of the connecting member 55 and the joist 31 attached to the Y portion 50b.

In step (5), as shown in FIG. 8, a heat insulating material 35 is placed on the ceiling base member 10 and the ceiling joists 31 .

In step (6), the wiring 80 introduced from the outside of the building 1 and connected to the power transmission line is arranged on the heat insulating material 35 arranged on the joist 31 .

In step (7), wiring 81 for introducing into the room is arranged between the heat insulating material 35 and the ceiling joist 31 .

FIG. 9 is a perspective view showing a state in which the inter-underfloor airtight member 14 is attached to the base airtight member 12 and a state in which the side airtight member 15 is attached in the ceiling base member 10 shown in FIG. FIG. 10 is a perspective view showing a state in which a reinforcing tape 17a is attached between the base airtight member 12, the inter-base airtight member 14, and the side airtight member 15 shown in FIG. FIG. 11 is a perspective view showing a state in which the reinforcing tape 17a is attached between the ceiling-side connecting portion 55b of the connecting member 55 shown in FIGS. 5 and 6 and the side airtight member 15 shown in FIG.

In step (8), after providing the joist 31 on the ceiling base member 10, as shown in FIG. 9, the base airtight member 12 of one adjacent ceiling base member 10 and the other ceiling base member 10, an inter-base airtight member 14 is provided between the airtight members 12 for the base. The extending portion 12b of the base airtight member 12 and the inter-base airtight member 14 are connected via an adhesive layer provided on the upper surface of the extending portion 12b. A reinforcing tape 17a is attached for reinforcement.

In step (9), a side airtight member 15 is provided so as to extend from the base airtight member 12 of one of the ceiling base members 10 to the side opposite to the other ceiling base member 10 . Of the ends of the side airtight members 15 opposite to the base airtight member 12, the ends on the +Y direction side are connected to the beam side airtight sheets 16, as shown in FIG. is connected to the ceiling-side connecting portion 55b of the connecting member 55. As shown in FIG.

At this time, the extending portion 12b of the base airtight member 12 and the side airtight member 15 are connected via an adhesive layer provided on the upper surface of the extending portion 12b. , a reinforcing tape 17a is attached for reinforcement. Further, as shown in FIG. 11, the side airtight member 15 and the ceiling-side connection portion 55b of the connection member 55 are connected via an adhesive layer provided on the lower surface of the ceiling-side connection portion 55b. attaches the reinforcing tape 17b. A reinforcing tape (not shown) is similarly attached to the connecting portion between the side airtight member 15 and the beam side airtight sheet 16 .

The order of steps (1) to (9) is not limited to the above order.

In the construction method described above, step (2) was performed after step (1). However, step (2) may be performed before step (1). Specifically, before attaching the suspension member 4 to the beam 3 , the suspension member 4 is connected to the joist support 11 of the ceiling base member 10 , and then the suspension member 4 connected to the ceiling base member 10 is attached to the beam 3 . , the two ceiling substrate members 10 may be arranged so as to extend in the first direction X and spaced apart from each other in the second direction Y. As shown in FIG.

Step (3) may be performed before steps (1) and (2). At least one of the steps (4) to (7) may be performed after the inter-base airtight member 14 is provided on the base airtight member 12 in step (8). Step (9) may be performed before step (8), or step (8) and step (9) may be performed simultaneously.

Further, in steps (8) and (9), the inter-underfloor airtight member 14 and the side airtight member 15 may be connected to the extending portion 12b or the ceiling-side connecting portion 55b with an adhesive. The inter-floor airtight member 14 and the side airtight member 15 may be connected to the lower surface of the extending portion 12b, and the side airtight member 15 may be connected to the upper surface of the ceiling side connection portion 55b.

Through the above steps, as shown in FIG. 4, the ceiling structure 30 including the suspension member 4, the ceiling base member 10, the ceiling joist 31, the base airtight member 14, and the side airtight members 15 is formed. , the ceiling structure 30 is provided with the heat insulating material 35 , the wiring 80 and the wiring 81 . Note that the wiring 80 is not shown in FIG.

The wiring 81 is provided inside the airtight line 2 (inside the room) and can be introduced into the room without breaking the airtight line 2 . However, the wiring 81 alone does not supply power from the power transmission line outside the building 1 . Therefore, the wiring 80 supplied with power from the power transmission line outside the building 1 and arranged on the heat insulating material 35 and the inter-floor airtight member 14 is introduced inside the airtight line 2 (inside the room), and connected to the wiring 81 for wiring. 81 must be powered.

FIG. 12 is a perspective view showing a state in which the wiring 80 on the inter-floor airtight member 14 is pulled into the room, and FIG. 13 is a perspective view showing a state in which the inter-floor airtight member 14 is repaired. When the wiring 80 arranged on the heat insulating material 35 and the airtight member between bases 14 is introduced into the room, the wiring 80 is introduced through the through holes provided in the heat insulating material 35 and the airtight member between bases 14 . As shown in FIG. 13, the through-hole 14a provided in the airtight member between substrates 14 is formed by attaching a repair tape 82 across the airtight member between substrates 14 and the wiring 80 around the through-hole 14a as shown in FIG. 14 airtightness is ensured. Power is supplied to the wiring 81 by connecting the end of the wiring 80 introduced into the room to one end of the wiring 81 .

After that, as shown in FIGS. 2 and 3, the ceiling plate material 32 is attached to the lower surface of the joist 31, and the ceiling structure 30 of the building 1 is completed. When the wiring 80 and the wiring 81 are introduced into the room, they may be introduced through a hole in the ceiling plate member 32 or through a hole in the inner wall plate member 51 via the inside of the wall member 50 .

(action, effect)
In the ceiling base member 10 according to the above embodiment, as shown in FIG. 5, the portion that connects the suspension member 4 of the base airtight member 12 (the portion that covers the hole 11a formed in the upper surface 11b1 of the ceiling joist receiver 11) By providing a through hole 12a1 in the hoisting member 4, the joist receiver 11 can be easily connected. On the other hand, the holes 11a of the ceiling joist receiver 11 that are not used for connection with the suspension member 4 are closed by the base airtight member 12, so that deterioration of the airtightness due to these holes 11a can be prevented.

In addition, since the entire upper surface 11b1 of the ceiling joist receiver 11 is covered with the covering portion 12a, as shown in FIG. An airtight line 2 can be formed between the two ceiling base members 10 by attaching the base airtight member 14 so as to straddle the base airtight members 12 of the ceiling base member 10 . Therefore, compared to the case where a plurality of joist receivers gathered together with the sheet are lifted together on the joist as in the building disclosed in Patent Document 1, Workability for attaching the airtight member 12 and the inter-floor airtight member 14 can be improved.

Furthermore, since the base airtight member 12 has extensions 12b extending on both sides in the second direction Y, when the base airtight member 14 is attached between the two ceiling base members 10, the suspension member The inter-floor airtight member 14 can be easily attached to the extending portion 12b apart from the base 4. The same applies to the side airtight member 15 .

Further, as shown in FIG. 5, since the adhesive layer 12a2 can maintain the state where the base airtight member 12 is attached to the predetermined position of the ceiling joist receiver 11, the operator can attach the base airtight member 12 to the predetermined position of the ceiling joist receiver 11. There is no need to hold the airtight member 12, and workability for connecting the ceiling base member 10 to the hanging member 4 can be improved.

In the above-described embodiment, the inter-base airtight member 14 and the side airtight member 15 are connected to the base airtight member 12 at positions apart from the hanging member 4 on both sides in the second direction Y of the covering portion 12a of the base airtight member 12. Therefore, it is possible to attach the inter-base airtight member 14 and the side airtight member 15 to the base airtight member 12 compared to the case where the covering part 12a has the extension part 12b only in one of the second directions Y. It is possible to improve the workability of

As described above, the airtight line is formed in the second direction Y using the side airtight members 15 for the two ceiling base members 10 in which the base airtight members 12 are connected to the base airtight members 14 with high workability. 2 can be extended.

The side airtight member 15 may be connected to an airtight layer (airtight sheet 54 and connecting member 55) provided on the wall 50, as shown in FIG. Alternatively, it may be connected to another adjacent ceiling substrate member 10 .

In the building 1 according to the above embodiment, the airtight layer of the wall 50 and the side airtight members 15 can be connected in the second direction Y. As shown in FIG.

In the building 1 according to the above embodiment, at least one end of the side airtight member 15 in the second direction Y can be arranged above the joist 31 (above the lower surface of the joist receiver 11), A space for arranging the wiring 81 and the like can be secured between the side airtight member 15 and the ceiling plate member 32 .

In the construction method of the building 1 according to the above embodiment, the ceiling base member 10 according to the above embodiment is used, so the building 1 can be constructed with high workability.

(Modification)
In the above-described embodiment, the adhesive layer 12a2 is provided only on the portion of one surface of the covering portion 12a of the base airtight member 12 that is adhered to the joist holder 11, and the release paper 12d is provided so as to cover the adhesive layer 12a2. However, the formation range of the adhesive layer 12a2 is not limited to this. For example, an adhesive layer may be provided on the entire one surface of the base airtight member 12, and release paper may be provided on portions of the adhesive layer corresponding to the covering portion 12a and the extending portion 12b. In this case, when the covering portion 12a is adhered to the upper surface 11b1 of the joist receiver 11, only the release paper 12d of the covering portion 12a is peeled off, and when the airtight member is attached to the extending portion 12b, the release paper of the extending portion 12b is removed. By peeling off, the adhesive layer of the extension 12b can be used to attach the inter-underfloor airtight member 14 or the side airtight member 15 to the extension 12b.

In the above embodiment, the extending portion 12b extends from the covering portion 12a to both sides in the second direction Y, but it may extend in at least one of the second directions Y. When the extending portion 12b extends only in one direction in the second direction Y, on the side where the extending portion 12b does not extend, the inter-underfloor airtight member 14 or the side airtight member 15 can be attached to the upper surface of the covering portion 12a. good.

In the above embodiment, the hole 11a is provided only in the top plate 11b of the joist receiver 11, and the top plate 11b is sandwiched between the fixing members 4b. However, as shown by the two-dot chain line in FIG. Alternatively, the suspension rods 4a may be passed through the holes 11a of both the top plate 11b and the bottom plate 11c, and the upper surface 11b1 of the top plate 11b and the lower surface of the bottom plate 11c may be sandwiched between the fixing members 4b. Further, even when the hole 11a is provided in the bottom plate 11c, only the top plate 11b may be sandwiched between the fixing members 4b. By providing the holes 11a in both the top plate 11b and the bottom plate 11c, the shape of the ceiling joist holder 11 becomes symmetrical in the vertical direction, and distinction between the upper and lower sides becomes unnecessary.

In the above embodiment, the airtight layer of the wall 50 has the airtight sheet 54 and the connection member 55. However, the airtight sheet 54 is extended from the wall 50 to the ceiling structure 30 without providing the connection member 55. It may be directly connected to the side airtight member 15 .

In the above-described embodiment, a hole 11a is provided in the upper surface 11b1 of the joist receiver 11 as a connected portion to which the hanging member 4 can be connected to the joist receiver 11, and the covering portion 12a of the base airtight member 12 communicates with the hole 11a. The case of forming the through-hole 12a1 for the same has been described. However, the connected portion is not limited to the hole 11 a provided in the ceiling joist receiver 11 . In addition, how to attach the hanging member 4 to the connected part, the top plate 11b or the top plate 11b and the bottom plate 11c of the ceiling joist receiver 11 are sandwiched by the fixing member 4b screwed to the hanging rod 4a penetrating the hole 11a. method is not limited.

Specifically, as indicated by a two-dot chain line in FIG. 5, the suspension member 4 is attached to a suspension rod 4d that is bent so as to bypass the base airtight member 12 in the -Y direction, and to the lower tip of the suspension rod 4d. A clamping portion 4e provided and capable of clamping the bottom plate 11c of the joist receiver 11 may be provided. In this case, the bottom plate 11c of the joist receiver 11 has a connected portion that can be connected to the suspension member 4 by being sandwiched between the sandwiching portions 4e. The suspension rod 4 d is arranged so as to pass through the connecting portion between the −Y direction side extension 12 b of the base airtight member 12 and the inter-base airtight member 14 or the side airtight member 15 . Alternatively, the suspension rod 4 d may pass through a through-hole provided in the inter-underfloor airtight member 14 or the side airtight member 15 .

In the above modified example, the inter-underfloor airtight member 14 or the side airtight member 15 may be attached to the upper surface of the extending portion 12b or may be attached to the lower surface of the extending portion 12b.

1 building 4 suspension member (ceiling structure)
10 ceiling base member 11 ceiling joist receiver 11a hole (connected portion)
11b1 upper surface 11c bottom plate (connected portion)
REFERENCE SIGNS LIST 12 base airtight member 12a covering portion 12a1 through hole 12a2 adhesive layer 12b extending portion 14 base airtight member (ceiling structure)
15 Side airtight member (ceiling structure)
31 Roof (ceiling structure)
32 ceiling plate material 50 wall body 54 airtight sheet (airtight layer)
55 connection member (airtight layer)
55a Wall side connection part 55b Ceiling side connection part X First direction Y Second direction

Claims (7)

A ceiling substrate member for a building,
a hoisting receiver extending in a first direction and connectable to a suspension member;
At least one of a covering portion adhered to the upper surface of the ceiling joist receiver via an adhesive layer so as to cover the entire upper surface of the ceiling joist receiver, and a second direction perpendicular to the first direction from the covering portion and at least one extending portion extending in the first direction along the covering portion. The joist receiver has an upper surface formed with a connected portion to which the hanging member can be connected,
The ceiling base member according to claim 1, wherein the covering portion is adhered to the upper surface of the ceiling joist receiver so as to cover the connected portion in a state in which a through hole communicating with the connected portion can be formed. The ceiling base member according to claim 1 or 2, wherein the base airtight member has two extension portions extending from the covering portion to both sides in the second direction. A ceiling structure of a building,
two suspension members;
The ceiling foundation according to any one of claims 1 to 3, which extends in the first direction and is spaced apart in the second direction and suspended by two suspension members. a member for
a plurality of ceiling joists extending in the second direction, connected to the lower part of the ceiling joist receiver and attached with a ceiling board;
A ceiling structure comprising: the base airtight member of one of the ceiling base members and the base airtight member provided between the base airtight member of the other ceiling base member. is a building,
a ceiling structure according to claim 4;
a wall body provided in the lower part of the ceiling structure and having an airtight layer;
The ceiling structure further includes a side airtight member extending from the base airtight member of one of the ceiling base members to the opposite side of the other ceiling base member,
An end of the side airtight member in the second direction opposite to the end connected to the base airtight member is connected to the airtight layer. The airtight layer of the wall includes an airtight sheet provided along the wall, a wall-side connecting portion extending upward from the upper end of the airtight sheet, and a lower surface of the ceiling joist receiver at the wall-side connecting portion. 6. The building according to claim 5, further comprising a connection member having a ceiling-side connection portion that extends from the portion to the indoor side and is connected to the side airtight member. A construction method for a building using the ceiling base member according to any one of claims 1 to 3,
attaching the two suspension members at predetermined positions in the building;
A step of connecting the two hanging members to the joist receivers before or after the step of attaching the two hanging members;
By the step of attaching the two suspension members and the step of connecting to the ceiling joist receiver, of the two ceiling base members that extend in the first direction and are spaced apart from each other in the second direction and providing an inter-floor airtight member between the base airtight member of one of the ceiling base members and the base airtight member of the other ceiling base member. Construction method.

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