JP6166554B2 - Building ceiling structure and building - Google Patents

Building ceiling structure and building Download PDF

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Publication number
JP6166554B2
JP6166554B2 JP2013042738A JP2013042738A JP6166554B2 JP 6166554 B2 JP6166554 B2 JP 6166554B2 JP 2013042738 A JP2013042738 A JP 2013042738A JP 2013042738 A JP2013042738 A JP 2013042738A JP 6166554 B2 JP6166554 B2 JP 6166554B2
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ceiling
material
surface material
portion
wall
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JP2014169594A (en
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康聖 木和田
康聖 木和田
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トヨタホーム株式会社
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  The present invention relates to a ceiling structure of a building and a building having the ceiling structure.

  When a device such as an outlet is attached to a wall portion such as an outer wall in a building such as a house, electrical wiring is laid inside the wall portion. In the configuration in which the electrical wiring is drawn into the wall portion from the ceiling back space, a hole for passing the electrical wiring is formed in the ceiling surface material (see, for example, Patent Document 1).

  In this configuration, the hole is arranged at a position that does not overlap with the wall portion in the ceiling surface material, and another hole is formed in the wall surface material that the wall portion has. It is drawn from the ceiling space to the inside of the wall by passing through both holes. In this case, even if the electrical wiring is pulled downward, the electrical wiring is not easily caught in the hole in the ceiling surface material by being caught in the hole in the wall surface material, and the peripheral portion of the hole in the ceiling surface material is not easily damaged. It has become.

JP 2000-8491 A

  However, when the hole in the ceiling surface material is arranged above the wall, the electric wiring is directly drawn from the ceiling back space through the hole into the inside of the wall, and the electric wiring is pulled downward. In such a case, there is a concern that the electrical wiring is rubbed against the top surface of the ceiling surface material around the hole and the ceiling surface material is damaged or damaged.

  This invention is made | formed in view of the said situation, and makes it the main objective to maintain the part which the electrical wiring penetrates, and its periphery in a suitable state about a ceiling surface material.

  Hereinafter, means and the like effective for solving the above-described problems will be described while showing functions and effects as necessary.

  A ceiling structure of a building according to a first aspect of the present invention includes a ceiling surface material that divides a living space and a ceiling back space up and down, and the ceiling surface material draws out an electrical wiring laid in the ceiling back space downward. Wiring holes are provided, and in the ceiling space, a protection plate portion that protects a portion of the ceiling surface material where the wiring holes are formed is provided so as to overlap the ceiling surface material, The protective plate is provided with a communication hole that communicates with the wiring hole.

  According to the first invention, since the protective plate portion is provided on the upper side of the ceiling surface material, the electrical wiring drawn downward from the ceiling back space through the wiring hole of the ceiling surface material is formed on the upper surface of the ceiling surface material. It is difficult to touch. In this case, even if the electrical wiring passed through the wiring hole in the ceiling surface material is pulled downward, the electrical wiring is rubbed against the upper surface of the ceiling surface material around the wiring hole and the ceiling surface material is damaged. It can control that it breaks. Therefore, about the ceiling surface material, the part which the electrical wiring penetrates and its periphery can be maintained in a suitable state.

  In addition, it is preferable that the said communication hole is contained in the position which overlaps with the said wiring hole up and down. In this case, since the ceiling surface material does not protrude inside the communication hole of the protective plate portion, the protective plate portion can restrict the electrical wiring from contacting the inner peripheral surface of the wiring hole of the ceiling surface material. Therefore, in addition to the upper surface of the ceiling member, the inner peripheral surface of the wiring hole can be suitably protected from the electrical wiring.

  According to a second invention, in the first invention, a ceiling base attached to a beam member and supporting the ceiling surface material is provided, and the protection plate portion is arranged side by side on the ceiling base and fixed to the ceiling base. Has been.

  According to the second invention, since the protective plate portion and the ceiling surface material are connected via the ceiling base, it is possible to prevent the position of the protective plate portion from being shifted from the wiring hole of the ceiling surface material. Moreover, since the load of a protection board part is disperse | distributed to a ceiling surface material and a ceiling base material, the load burden applied to a ceiling surface material from a protection board part can be reduced.

  According to a third invention, in the second invention, the ceiling base has a field edge extending along a gap between the ceiling surface material and the beam material, and the field edge is the beam. It is fixed to the lower surface of the material, and the protection plate is fixed to the side surface of the field edge.

  According to the third invention, in the configuration in which the field edge is provided immediately below the beam material, the protection plate portion is fixed to the field edge, so that the protection plate portion can be firmly fixed to the beam material. In this case, the wiring hole portion of the ceiling surface material can be suitably reinforced by the protective plate portion.

  According to a fourth invention, in the third invention, the ceiling surface material is provided below two beam members orthogonal to each other, and the ceiling base is one of the two beam materials. A first field edge provided between the beam member and the ceiling member, and extending along the beam member provided between the other beam member and the ceiling member. And the protection plate portion lies side by side with both the first field edge and the second field edge, and each of the first field edge and the second field edge. It is fixed to the side.

  According to the fourth invention, since the two sides of the protection plate portion are respectively fixed to the field edge, the protection plate portion can be suitably supported by the field edge. In this case, the protective plate is provided for the corner portion of the ceiling surface material. Here, in the configuration in which the wiring hole is formed in the corner portion of the ceiling surface material, it is considered that the peripheral portion of the wiring hole in the ceiling surface material is likely to be chipped, but a protective plate portion is provided for the corner portion. As a result, it is possible to suppress the peripheral portion of the wiring hole from being lost by the protective plate portion.

  In a fifth invention, in any one of the first to fourth inventions, the lower surface of the protection plate portion and the upper surface of the ceiling member are joined to each other.

  According to the fifth invention, since the ceiling surface material is reinforced by the protective plate portion around the wiring hole, even if the electrical wiring contacts the ceiling surface material, the wiring in the ceiling surface material It can suppress that the peripheral part of a hole lacks.

  A building according to a sixth aspect of the present invention is a building including the ceiling structure according to any one of the first to fifth aspects, and includes a wall portion having a pair of wall surfaces provided apart from each other, and the ceiling The face material is disposed above at least one of the pair of wall materials, and the ceiling space communicates with a separated portion of the pair of wall materials through the wiring holes and the communication holes, The wall surface material is provided with a wiring lead-out portion capable of pulling out the electric wiring passed through the wiring hole and the communication hole from between the pair of wall surface materials.

  In the configuration in which the wiring lead-out portion is provided on the wall portion as in the sixth invention, when pulling the electric wiring downward from the wiring hole of the ceiling surface material, the force pulling the electric wiring downward is applied to the ceiling surface material. It is difficult to prevent the wiring from being added, and it is considered that the peripheral portion of the wiring hole in the ceiling surface material is likely to be damaged or broken by pulling out the electric wiring from the wiring drawing portion of the wall portion.

  On the other hand, since the protective plate portion is provided on the upper side of the ceiling surface material, the ceiling surface material is provided for the peripheral portion of the wiring hole in the ceiling surface material even when the electrical wiring is drawn out from the wiring drawing portion of the wall portion. Can be prevented by the protective plate portion.

  In a seventh invention, in the sixth invention, comprising an outdoor side beam material extending along a peripheral edge portion of the ceiling back space, the wall portion is an outer wall portion partitioning the living space and the outdoors, One of the pair of wall surface materials is an inner wall surface material disposed on the living space side, the other is an outer wall surface material disposed on the outdoor side, and the ceiling surface material is formed of the inner wall surface material. It is arranged above and fixed to the outdoor side beam member in a state facing the lower surface of the outdoor side beam member, and the wiring hole is between the outdoor side beam member and the inner wall surface member in the wall thickness direction. It is arranged at the position.

  In the configuration where the outdoor side beam material is installed above the outer wall part, it is conceivable to form a hole in the outdoor side beam material and draw out the electrical wiring from the ceiling space through the hole to the inside of the outer wall part. In this case, there is a concern that the number of work steps for forming a hole in the outdoor side beam material increases. In general, the ceiling surface material is attached to the lower surface of the outdoor side beam material via a ceiling base such as a field edge, and the electrical wiring is passed through the gap between the ceiling surface material and the outdoor side beam material. Is also considered difficult.

  On the other hand, according to the seventh invention, since the wiring hole of the ceiling surface material is arranged on the indoor side with respect to the outdoor side beam material, the hole for passing the electric wiring is formed in the outdoor side beam material. There is no need. Here, the work of forming the wiring hole and the communication hole in the ceiling surface material and the protection plate is easier than the work of forming the hole in the outdoor side beam material that is the structure, and the hole for passing the electric wiring. The process of forming can be facilitated.

  Moreover, since it is possible to arrange the protective plate portion on the indoor side with respect to the outdoor side beam material, for example, the protective plate portion is compared with the case where the protective plate portion is arranged at a position overlapping the outdoor side beam material. Installation work and communication hole formation work can be facilitated.

  In an eighth invention according to the sixth or seventh invention, the wall portion is an outer wall portion that partitions the living space and the outdoors, and one of the pair of wall materials is disposed on the living space side. It is an inner wall surface material, and the other is an outer wall surface material arranged on the outdoor side, and a wall opening is provided at a position lower than the ceiling surface material in the outer wall portion. A sash frame is attached to the sash frame, the sash frame is provided between the columns arranged along the outer wall portion, and the outer wall portion is provided between the pair of wall surface materials. A wall heat insulating part, an inner space provided between the wall heat insulating part and the outer wall surface material, and provided above the sash frame in a state of being spanned between the pillars in the inner wall space; An upper base material that supports the outer wall surface material, and the wiring hole has a wall thickness. Wherein provided above the base material and the position between the inner wall surface material in countercurrent.

  In the configuration where the upper base material is spanned between the columns above the sash frame in the outer wall portion, a hole is formed in the upper base material, and the electrical wiring is drawn from the ceiling back space to the inside of the outer wall portion through the hole. However, there is a concern that the strength of the upper base material may be reduced by forming the holes.

  On the other hand, according to the eighth invention, since the wiring hole of the ceiling surface material is arranged on the indoor side with respect to the upper base material, it is necessary to form a hole for passing electric wiring in the upper base material. In other words, it can be avoided that the strength of the upper base material is lowered by the holes.

  Moreover, since it is possible to arrange the protective plate portion indoors with respect to the upper base material, for example, compared to the case where the protective plate portion is arranged at a position overlapping the upper base material, the protective plate portion is installed. Work and formation of communication holes can be facilitated.

  It is a unit type building constructed by combining a plurality of building units having columns, ceiling beams, and floor beams, wherein the sash frame is disposed between adjacent columns in the building unit, and the ceiling surface material Above, a pair of ceiling beams connected to one pillar in the building unit is provided, at least one of the ceiling beams is the outdoor side beam material, and the ceiling foundation is the pair of ceiling beams. In a state of extending along each of the ceiling beams, the ceiling beams are provided between the ceiling beams and the ceiling surface material, and the protection plate portion extends along the pair of ceiling beams in the ceiling base. It is preferably fixed to each of the parts.

  In this case, since the two sides of the protective plate portion are fixed to the ceiling base, the protective plate can be suitably supported by the ceiling base.

  In a ninth invention, in the eighth invention, the ceiling surface material is a ceiling foundation provided between the ceiling surface material and an outdoor side beam material extending along a peripheral edge of the ceiling back space. The upper base material has a ceiling side fixing portion that overlaps the lower surface of the ceiling surface material and is fixed to the ceiling base material through the ceiling surface material. The ceiling-side fixing portion extends along the upper base material.

  In the ninth invention, since the gap between the upper base material and the ceiling surface material is closed by the ceiling-side fixing portion, it is possible to pass the electrical wiring through the gap between the upper base material and the ceiling surface material. It seems difficult. For this reason, it is preferable that the wiring hole of a ceiling surface material is arrange | positioned indoors rather than an upper base material.

Perspective view showing the structure of the building unit Indoor side front view of outer wall Vertical section of the outer wall Cross section of outer wall Perspective view around the protective plate

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In this embodiment, the ceiling structure of the present invention is embodied in a two-story unit type building having a steel frame ramen structure. The unit type building is constructed by combining a plurality of building units. First, the configuration of the building unit will be described with reference to FIG. FIG. 1 is a perspective view showing the configuration of the building unit 20.

  As shown in FIG. 1, the building unit 20 includes columns 21 arranged at the four corners, a ceiling beam 22 connected to the upper end (upper end) of the column 21, and the lower end (lower end) of the column 21. The column 21, the ceiling beam 22 and the floor beam 23 form a rectangular parallelepiped skeleton (frame). The column 21 is made of a square tube-shaped square steel. Further, the ceiling beam 22 and the floor beam 23 are made of channel steel having a U-shaped cross section, and are arranged toward the inside of the unit so that the groove opening sides face each other.

  In the building unit 20, a plurality of ceiling beams 25 are bridged between the ceiling large beams 22 extending along the long side portion (girder surface) and facing each other at a predetermined interval. Similarly, a plurality of floor beams 26 are bridged at predetermined intervals between the large floor beams 23 that extend along the long side portion and face each other. The ceiling beam 25 and the floor beam 26 extend in parallel to the ceiling beam 22 and the floor beam 23 on the short side (wife side) at the same interval. The ceiling beam 25 and the floor beam 26 are each made of lip groove steel. A ceiling member 28 is supported by the ceiling beam 25 and a floor member 29 is supported by the floor beam 26.

  The building unit 20 is provided with an outer wall 31 that partitions the building space from the outside. The outer wall portion 31 is disposed on the side surface portion on the outdoor side of the building unit 20, and is fixed to the column 21, the ceiling beam 22 and the floor beam 23. A window 32 as a wall opening is formed in the outer wall 31, and a sash frame 33 is provided in the window 32. The sash frame 33 is formed in a rectangular frame shape using a synthetic resin material, a metal material, or the like, and is attached to the outer wall portion 31.

  The sash frame 33 is provided on the short side of the building unit 20 and is a high sash disposed at a height position near the ceiling member 28. The sash frame 33 has a horizontally long shape having a width dimension larger than a height dimension. The sash frame 33 is disposed between the adjacent columns 21, has a width dimension smaller than the separation distance between the columns 21, and is separated from each column 21 in the width direction of the sash frame 33. The sash frame 33 has a pair of vertical frame portions 33a that form the side portions thereof, an upper frame portion 33b that forms the upper side portion, and a lower frame portion 33c that forms the lower side portion. 33b and the lower frame part 33c have connected a pair of vertical frame part 33a.

  In the building unit 20, a unit housing is formed including the columns 21, the ceiling beams 22, and the floor beams 23, and the outer wall portion 31 and the sash frame 33 are attached to the unit housing. In this case, the unit housing corresponds to a building structure.

  Electric wiring is laid inside the outer wall portion 31, and here, the laying structure of the electric wiring in the building will be described with reference to FIGS. 2 is a front view of the outer wall 31 on the indoor side, FIG. 3 is a longitudinal sectional view of the outer wall 31, and FIG. 4 is a transverse sectional view of the outer wall 31. In FIG. 2, the illustration of the ceiling beam 22 and the like disposed above the ceiling member 28 is omitted. 3A is a cross-sectional view taken along line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along line BB in FIG. In FIG. 4, the CC sectional view taken on the line of FIG. 2 is shown.

  As shown in FIG. 2, the outer wall portion 31 is provided with a window frame 34 in addition to the sash frame 33. The window frame 34 is disposed on the indoor side of the sash frame 33, and the window frame 34 and the sash frame 33 overlap each other in the wall thickness direction. The window frame 34 is formed in a rectangular frame shape having substantially the same size and shape as the sash frame 33 using wood, a synthetic resin material, or the like, and is fixed to the sash frame 33 with screws or the like. Similarly to the sash frame 33, the window frame 34 has a pair of vertical frame portions 34a, an upper frame portion 34b, and a lower frame portion 34c.

  In addition, the window part 32 is provided in living space 41 (refer FIG. 3), such as a living room. The ceiling surface material 28 is formed of gypsum board or the like, and divides the living space 41 and the ceiling back space 42 provided above the living space 41 vertically. An underfloor space 43 is provided below the living space 41.

  As shown to Fig.3 (a), the outer wall part 31 has the outer wall panel 45 arrange | positioned at the outdoor side, and the inner wall panel 46 arrange | positioned at the living space 41 side. The outer wall panel 45 includes an outer wall surface material 51 that forms an outer wall surface, and an outer wall frame 52 as an outer wall base that supports the outer wall surface material 51. The outer wall surface material 51 is formed of an exterior material such as a siding board, and is fixed to the ceiling beam 22 and the floor beam 23 via an outer wall frame 52. The outer wall frame 52 includes a horizontal frame member 53 extending along the width direction of the outer wall member 51 and a vertical frame member 54 extending along the vertical direction. A plurality of the horizontal frame members 53 are provided side by side at a predetermined interval.

  The inner wall panel 46 includes an inner wall surface material 55 that forms an inner wall surface, and an inner wall base 56 that supports the inner wall surface material 55. The inner wall surface material 55 is formed of an interior material such as gypsum board, and is fixed to the outer wall frame 52, the ceiling beam 22, and the floor beam 23 via an inner wall base 56. The inner wall base 56 includes a base horizontal member 57 extending along the width direction of the inner wall surface material 55 and a base vertical member 58 (see FIG. 4) extending along the vertical direction. A plurality of base cross members 57 are provided in a line up and down at a predetermined interval, and the base vertical members 58 are provided side by side at a predetermined interval.

  In the outer wall portion 31, the outer wall surface material 51 and the inner wall surface material 55 correspond to a pair of wall surface materials provided to be separated from each other. A wall heat insulating portion 61 such as glass wool is provided between the outer wall surface material 51 and the inner wall surface material 55, and the wall heat insulating portion 61 extends along the outdoor side surface of the inner wall surface material 55. The wall heat insulating portion 61 is separated indoors from the outer wall surface material 51, and the separated portion serves as the wall space 62. In this case, the outer wall frame 52 is installed in the wall space 62.

  In addition, between the adjacent columns 21 without sandwiching the sash frame 33 and the window frame 34, the in-wall space 62 serves as a ventilation portion that allows the ceiling back space 42 and the underfloor space 43 to communicate with each other. Yes. On the other hand, as will be described in detail later, the inner wall space 62 allows ventilation between the outer wall surface material 51 and the wall heat insulating portion 61 between the columns 21 adjacent to each other with the sash frame 33 and the window frame 34 interposed therebetween. There is no ventilation.

  Above the living space 41, a ceiling portion 65 configured to include the ceiling surface material 28 is provided. In the ceiling portion 65, the ceiling surface material 28 is fixed to the ceiling beam 22 via a field edge 66. The field edge 66 is disposed between the ceiling member 28 and the ceiling beam 22 and extends along the longitudinal direction of the ceiling beam 22. In this case, the field edge 66 is sandwiched between the ceiling member 28 and the ceiling beam 22. Here, the ceiling surface material 28 is disposed above the inner wall surface material 55, and the relationship between the ceiling surface material 28 and the inner wall surface material 55 is in a state of winning the ceiling. The field edge 66 constitutes the ceiling foundation, and the ceiling girder 22 corresponds to the beam material.

  As shown in FIG. 3B, the plurality of horizontal frame members 53 in the outer wall panel 45 include an upper horizontal frame member 53 a as an upper base material provided above the sash frame 33. The upper horizontal frame member 53a extends along the upper frame portion 33b of the sash frame 33, and is disposed at a position overlapping with the upper frame portion 33b. The upper horizontal frame member 53a is stretched over the columns 21 adjacent to each other with the sash frame 33 interposed therebetween, and connects the columns 21. In this case, the upper horizontal frame member 53a vertically separates the space between the outer wall surface member 51 and the wall heat insulating portion 61, so that the in-wall space 62 does not communicate with the ceiling back space 42 and the underfloor space 43. It is configured.

  In the outer wall portion 31, the window frame 34 is spaced downward from the ceiling surface material 28, and an inner wall surface material 55 is also provided in the separated portion. Here, the plurality of base cross members 57 include a base cross member 57 a extending along the lower surface of the ceiling surface member 28 and a base cross member 57 b extending along the upper surface of the upper frame portion 34 b of the window frame 34. The upper frame portion 34b of the window frame 34 is fixed to the base cross member 57b with screws or the like. Of the base cross members 57a and 57b, the upper base cross member 57a protrudes to the side of the window frame 34 in the wall width direction.

  Each ceiling beam 22 of the building unit 20 includes an outdoor beam 22a disposed on the outdoor side. The outdoor side large beam 22 a extends along the outer wall portion 31 and is disposed on the outdoor side of the inner wall surface material 55. In this case, the outdoor side large beam 22a extends along the peripheral edge of the ceiling space 42. Further, in the wall thickness direction, the outdoor side beam 22a and the inner wall surface material 55 are separated from each other. It should be noted that the lower surface of the outdoor side beam 22 a is in a state of facing the upper surface of the ceiling member 28.

  An upper horizontal frame member 53 a is fixed to the outdoor side beam 22 a via a ceiling surface member 28 and a field edge 66. A connecting bracket 68 for connecting the upper horizontal frame member 53a and the ceiling surface member 28 is attached to the upper horizontal frame member 53a. The connecting bracket 68 is a long member having an L-shaped cross section, and extends along the upper horizontal frame member 53a. The connecting bracket 68 has a vertical portion that overlaps the indoor side surface of the upper horizontal frame member 53a and a horizontal portion that overlaps the lower surface of the ceiling surface material 28, and the horizontal portion is connected to the field through the ceiling surface material 28 by screws or the like. It is fixed to the edge 66. In this case, the connection bracket 68 is stretched over the upper horizontal frame member 53a and the ceiling surface member 28, and closes the gap between the upper horizontal frame member 53a and the ceiling member 28. . In the outer wall panel 45, the connection bracket 68 corresponds to the ceiling side fixing portion.

  Returning to the description of FIG. 2, the outer wall portion 31 is provided with a wiring lead-out portion 71 that can lead out the electric wiring E to the living space 41 side. The wiring lead-out portion 71 is a hole provided in the inner wall surface material 55, and a device 72 with a wall such as an outlet is attached to the wiring lead-out portion 71. The electrical wiring E is drawn into the interior of the outer wall portion 31 from the ceiling space 42, and the tip portion thereof is connected to the walled device 72. The wiring lead portion 71 is disposed below the window portion 32.

  The electrical wiring E passes through the gap between the pillar 21 and the window portion 32 and is spanned between the ceiling back space 42 and the wiring lead-out portion 71. Here, when the electric wiring E is drawn from the ceiling back space 42 to the inside of the outer wall portion 31, a hole is formed in the web of the ceiling beam 22, and the electric wiring E is passed from the ceiling back space 42 to the wall space by passing the hole. Although it is conceivable that the inner space 62 is vertically divided by the upper horizontal frame member 53 a above the sash frame 33, the electric wiring E can be drawn into a side region of the sash frame 33. Can not.

  Therefore, in the present embodiment, as shown in FIG. 3A, a wiring hole 75 is formed in the ceiling surface material 28, and the electric wiring E passes from the ceiling back space 42 to the inside of the outer wall portion 31 through the wiring hole 75. Has been drawn into. The wiring hole 75 is disposed between the outdoor large beam 22a and the inner wall surface material 55 in the wall thickness direction. For this reason, it is not necessary to form a hole for passing the electric wiring E in the outdoor side large beam 22a or the upper horizontal frame member 53a. Moreover, the wiring hole 75 is arrange | positioned in the position which overlaps with the wall heat insulation part 61 up and down, and the wall heat insulation part 61 is the state which covered the wiring hole 75 from the outdoor side and the downward direction. Incidentally, the wiring hole 75 has a circular shape.

  As shown in FIG. 4, the electrical wiring E is laid in a state in which the gap between the window portion 32 and the pillar 21 extends in the vertical direction. Of the gap between the window portion 32 and the pillar 21, the vertical frame member 54 is disposed in the gap between the sash frame 33 and the pillar 21, and it is difficult to secure a space for passing the electric wiring E. It consists of.

  On the other hand, in the gap between the window frame 34 and the column 21, although the base vertical member 58 and the wall heat insulating portion 61 are arranged, the electric wiring E can be passed. The vertical frame portion 34 a of the window frame 34 is fixed to the base vertical member 58 with screws or the like, and a wall heat insulating portion 61 is provided between the base vertical member 58 and the column 21. The electrical wiring E is passed between the wall heat insulating portion 61 and the inner wall surface material 55 and is covered from the outdoor side by the wall heat insulating portion 61.

  The wiring hole 75 is disposed at a position above the gap between the window portion 32 and the pillar 21, that is, at a position near the pillar 21 of the building unit 20. In this case, the wiring hole 75 is provided with respect to the corner portion of the ceiling member 28.

  Here, when the electrical wiring E passed through the wiring hole 75 is pulled downward, for example, by being pulled out from the wiring drawing portion 71 of the outer wall portion 31, the electrical wiring E is connected to the wiring hole 75 in the ceiling surface material 28. There is a concern that the upper surface of the ceiling surface material 28 may be damaged or damaged due to contact with the peripheral portion. Moreover, since the wiring holes 75 are arranged at the corners of the ceiling member 28, there is a concern that the corners of the ceiling member 28 are likely to be chipped.

  On the other hand, in the present embodiment, a protection plate portion 76 that protects the ceiling member 28 is provided for the wiring hole 75. Here, the protection structure of the ceiling member 28 will be described with reference to FIGS. 3 and 5. FIG. 5 is a perspective view around the protective plate portion 76.

  As shown in FIGS. 3 and 5, the protection plate portion 76 is placed on the ceiling surface material 28. The lower surface of the protection plate portion 76 is overlaid on the upper surface of the ceiling member 28, and the lower surface and the upper surface are joined to each other by an adhesive, a double-sided tape, or the like. In this case, the entire lower surface of the protective plate portion 76 is a bonding portion with respect to the upper surface of the ceiling member 28. The protection plate portion 76 is provided so as to cover the wiring hole 75 from above, and has a communication hole 77 that communicates with the wiring hole 75. The communication hole 77 is disposed above the wiring hole 75 and has the same size and shape as the wiring hole 75. The communication hole 77 is arranged at a position where the central axis thereof coincides with the central axis of the wiring hole 75. In this case, the communication hole 77 and the wiring hole 75 overlap each other in the vertical direction, and all the portions of the communication hole 77 are included in the wiring hole 75. The electric wiring E is passed through the communication hole 77 in addition to the wiring hole 75.

  The protection plate portion 76 is formed in a rectangular shape from wood, and is arranged side by side with the field edge 66 on the ceiling surface material 28. In this case, the protection plate portion 76 is disposed closer to the living space 41 than the outdoor side beam 22a. The protection plate portion 76 is disposed at a position where its side end surface overlaps the side end surface of the field edge 66, and a nail 78 is driven so as to straddle the boundary portion between the protection plate portion 76 and the field edge 66. The nail 78 is driven obliquely from the upper surface of the protection plate portion 76 toward the side end surface of the field edge 66, and the protection plate portion 76 is fixed to the field edge 66. Further, the protective plate 76 has the same thickness dimension as the field edge 66. Further, the protection plate portion 76 has a long side and a short side, and the long side is installed in a direction extending along the outdoor side large beam 22a.

  In the building unit 20, in addition to the outdoor large beam 22a, orthogonal large beams 22b orthogonal to the outdoor large beam 22a are included in the plurality of ceiling large beams 22, and the outdoor large beam 22a and the orthogonal large beam 22b are 1 It is connected to two pillars 21. The outdoor large beam 22a corresponds to the outdoor beam material, and the orthogonal large beam 22b corresponds to the orthogonal beam material.

  The field edge 66 includes a first field edge 66a provided below the outdoor large beam 22a and a second field edge 66b provided below the orthogonal large beam 22b. The first field edge 66a extends along the longitudinal direction of the outdoor large beam 22a, and the second field edge 66b extends along the longitudinal direction of the orthogonal large beam 22b.

  The protection plate portion 76 is disposed at the corner of the outdoor large beam 22a and the orthogonal large beam 22b, and is disposed side by side with both the first field edge 66a and the second field edge 66b. In the protection plate portion 76, one of the side end surfaces orthogonal to each other is overlapped with the side end surface of the first field edge 66a, and the other side end surface is overlapped with the side end surface of the second field edge 66b. Yes. The nail 78 is driven into each of a boundary portion between the protection plate portion 76 and the first field edge 66a and a boundary portion between the protection plate portion 76 and the second field edge 66b. The field edge 66 provided below the outdoor side beam 22a may be referred to as a second field edge, and the field edge 66 provided below the orthogonal beam 22b may be referred to as a first field edge. .

  The protection plate portion 76 is in a state of straddling the inner wall surface material 55 in the wall thickness direction. One end of the protection plate 76 is disposed closer to the living space 41 than the inner wall surface material 55, and the other end is disposed on the outdoor side of the inner wall surface material 55. Here, in the configuration in which the entire protection plate portion 76 is disposed on the outdoor side with respect to the inner wall surface material 55, the upper end of the inner wall surface material 55 is placed on the portion on the outdoor side of the inner wall surface material 55 in the ceiling surface material 28. There is a concern that the ceiling surface material 28 is likely to be damaged, for example, when a downward load is applied as a fulcrum from the protective plate 76. On the other hand, in the configuration in which the protection plate portion 76 straddles the inner wall surface material 55 in the indoor / outdoor direction as in this embodiment, both the indoor and outdoor sides of the load from the protection plate portion 76 straddle the inner wall surface material 55. Can be dispersed.

  A procedure for forming the wiring holes 75 and the communication holes 77 in the ceiling member 28 and the protection plate portion 76 will be briefly described. First, the protective plate portion 76 is placed on the ceiling surface material 28 before the wiring hole 75 is formed in the ceiling surface material 28, and the protective plate portion 76 is placed on the ceiling surface material 28 and the field edge 66. Fix it. Thereafter, holes are collectively formed in the protection plate portion 76 and the ceiling surface material 28 from above using an electric tool or the like in the ceiling back space 42. In this case, the hole formed in the protection plate portion 76 is a communication hole 77, and the hole formed in the ceiling surface material 28 is a wiring hole 75.

  Here, the base horizontal member 57a may exist below the position where the wiring hole 75 is formed on the lower side of the ceiling surface material 28. The base horizontal member 57a has a protection plate portion 76 and a ceiling. When holes are formed in the face material 28, portions overlapping the holes (the wiring holes 75 and the communication holes 77) are cut out. Thereby, it can be avoided that the base cross member 57a becomes an obstacle and the electric wiring E cannot be drawn into the outer wall portion 31 from the ceiling back space 42.

  The wiring hole 75 and the communication hole 77 are not formed together, but before the protective plate portion 76 is installed on the ceiling surface material 28, the operation of forming the wiring hole 75 in the ceiling surface material 28 and the protection The work procedure of performing the work of forming the communication hole 77 in the plate part 76 separately and installing the protective plate part 76 on the ceiling surface material 28 at a position where the communication hole 77 overlaps the wiring hole 75 vertically. It may be.

  According to the embodiment described in detail above, the following excellent effects can be obtained.

  Since the wiring hole 75 of the ceiling surface material 28 and the communication hole 77 of the protective plate portion 76 superimposed on the ceiling surface material 28 communicate with each other in the vertical direction, the wiring hole 75 is drawn downward from the ceiling back space 42 through the wiring hole 75. The protective plate portion 76 can suppress the electrical wiring E being in contact with the upper surface of the ceiling member 28 around the wiring hole 75. Therefore, about the ceiling surface material 28, the part which the electrical wiring E penetrates, and its periphery can be maintained in a suitable state.

  Since the communication hole 77 and the wiring hole 75 are provided so that the ceiling surface material 28 does not protrude at a position overlapping the communication hole 77 in the vertical direction, the electrical wiring E is in contact with the inner peripheral surface of the wiring hole 75. Can be suppressed.

  Since the lower surface of the protection plate portion 76 and the upper surface of the ceiling surface material 28 are joined by an adhesive or the like, a part of the peripheral portion of the wiring hole 75 in the ceiling surface material 28 is missing due to contact with the electrical wiring E or the like. This can be suppressed.

  Since the protection plate portion 76 is fixed to the field edge 66, the protection plate portion 76 and the ceiling surface material 28 are connected via the field edge 66, so the position of the protection plate portion 76 is the ceiling surface material 28. This prevents the wiring hole 75 from being displaced in the horizontal direction. Further, since the load of the protection plate portion 76 is distributed to the ceiling surface material 28 and the field edge 66, the load burden applied to the ceiling surface material 28 from the protection plate portion 76 can be reduced.

  Since the protection plate portion 76 is fixed to the field edge 66 that is sandwiched between the ceiling surface material 28 and the ceiling beam 22, the protection plate portion 76 can be firmly fixed to the ceiling beam 22. . Thereby, the reinforcement state with respect to the wiring hole 75 of the ceiling surface material 28 by the protective plate part 76 can be made suitable.

  Since the protective plate portion 76 provided for the corner portion of the ceiling surface material 28 is fixed to both the first field edge 66a and the second field edge 66b, wiring is made to the corner portion of the ceiling surface material 28. In the configuration in which the hole 75 is arranged, the protection plate portion 76 can suppress that the corner portion can be written.

  In the configuration in which the electric wiring E drawn out from the wiring hole 75 of the ceiling member 28 is drawn into the outer wall portion 31, when the wiring drawing portion 71 is formed on the outer wall portion 31, the wiring drawing portion 71 By drawing out the electrical wiring E, a load is applied from the electrical wiring E to the peripheral portion of the wiring hole 75 in the ceiling surface material 28. However, the protection plate portion 76 suitably protects the ceiling surface material 28 from the load. can do.

  In the wall thickness direction, the wiring hole 75 of the ceiling surface material 28 is disposed between the outdoor side large beam 22a and the inner wall surface material 55. Therefore, it is necessary to form a hole for passing the electric wiring E in the outdoor side large beam 22a. There is no. In this case, since it is not necessary to draw out the electric wiring E to the outdoor side from the outdoor side beam 22a (ceiling space 42), the electric wiring E is insulated from the ceiling in the configuration in which the ceiling heat insulating material is installed in the ceiling space 42. It can suppress that the thermal insulation effect by the ceiling heat insulating material falls by penetrating a material indoors and outdoors. Moreover, since it becomes possible to arrange | position the protection board part 76 indoors rather than the outdoor side large beam 22a, compared with the case where the protection board part 76 is arrange | positioned in the position which overlaps with the outdoor side large beam 22a up and down, for example. Installation work of the plate part 76 and formation work of the communication hole 77 can be facilitated.

  Since the wiring hole 75 is disposed between the upper horizontal frame member 53a disposed above the sash frame 33 and the inner wall surface member 55 in the wall thickness direction, the hole for passing the electric wiring E is provided in the upper horizontal frame. There is no need to form the material 53a. Therefore, it can be avoided that the strength of the upper horizontal frame member 53a is lowered by the hole. Even if the connection bracket 68 fixed to the upper horizontal frame member 53 a is fixed to the lower surface of the outdoor side large beam 22 a via the ceiling surface material 28, the wiring hole is located on the indoor side of the connection bracket 68. Since 75 is disposed, the electric wiring E can be drawn out from the ceiling space 42 through the wiring hole 75.

  Since the wiring hole 75 is disposed above the wall heat insulating portion 61, the electric wiring E can be turned closer to the living space 41 side than the wall heat insulating portion 61 without being exposed to the in-wall space 62. In this case, since the electric wiring E does not cross the wall heat insulating portion 61 in the wall thickness direction, it is possible to suppress the heat insulating performance of the wall heat insulating portion 61 from being lowered by the electric wiring E.

[Other Embodiments]
The present invention is not limited to the description of the above embodiment, and may be implemented as follows, for example.

  (1) In the above embodiment, the communication hole 77 of the protection plate portion 76 has the same size and shape as the wiring hole 75 of the ceiling member 28, but the communication hole 77 may be smaller than the wiring hole 75. Even in this case, it is preferable that the communication hole 77 is disposed at a position where all the portions of the communication hole 77 are included in the wiring hole 75.

  (2) In the above embodiment, all the portions of the communication hole 77 are included in the wiring hole 75, but the wiring hole 75 may protrude beyond the communication hole 77. The configuration in which the wiring hole 75 protrudes inward from the communication hole 77 includes a configuration in which the communication hole 77 and the wiring hole 75 are arranged at positions where their central axes do not coincide with each other, and the shape and size of the communication hole 77. Is different from the wiring hole 75. In these configurations, there is a concern that the electrical wiring contacts the upper end portion of the inner peripheral surface of the wiring hole 75, but the upper surface of the ceiling member 28 is placed around the wiring hole 75 by the protective plate portion 76. Can be protected from.

  (3) In the above embodiment, the lower surface of the protection plate portion 76 and the upper surface of the ceiling surface material 28 are joined, but the protection plate portion 76 is fixed to the ceiling surface material 28 by a fixing tool such as a screw. May be. However, in this case, the portions where the fixtures are driven are scattered along the surface of the protective plate portion 76, and the entire portion of the ceiling surface material 28 where the protective plate portion 76 is overlapped is formed. The protective plate 76 is not reinforced.

  (4) The side edge surfaces of the protection plate portion 76 and the field edge 66 may be joined together by an adhesive or the like. Further, the protection plate portion 76 may be arranged at a position separated from the field edge 66 in the direction in which the ceiling surface extends. In this case, the protection plate portion 76 cannot be fixed to the field edge 66, but the ceiling surface material 28 is protected by the protection plate portion 76 at the installation position of the protection plate portion 76.

  (5) In the above embodiment, the protection plate portion 76 is disposed on the indoor side of the ceiling beam 22, but the protection plate portion 76 is disposed at a position where at least a part thereof overlaps the ceiling beam 22 vertically. May be. That is, the protection plate portion 76 may be in a state where it enters between the ceiling beam 22 and the ceiling surface material 28.

  Further, the field edge 66 may be a protective plate portion. For example, the field edge 66 protrudes to the indoor side from the outdoor side beam 22a, and the protruding portion is arranged at a position overlapping the wiring hole 75 vertically. In this case, since the communication hole 77 is provided at a position overlapping the wiring hole 75 in the field edge 66, the role of the protection plate portion that protects the upper surface of the ceiling member 28 around the wiring hole 75 is the field edge 66. Will fulfill.

  (6) The protection plate portion 76 may not be rectangular as long as it has a side extending along the first field edge 66a and a side extending along the second field edge 66b. Further, the thickness dimension of the protection plate portion 76 may not be the same as the thickness dimension of the field edge 66.

  (7) In the above-described embodiment, the protective plate portion 76 is disposed side by side on the field edges 66a and 66b provided on the lower side of the ceiling beam 22; however, the protective plate portion 76 is located on the lower side of the ceiling beam 25. It may be arranged side by side on the field edge 66 provided on the field edge 66, or may be fixed to the field edge 66.

  (8) In the above embodiment, the field edge 66 is sandwiched between the ceiling surface material 28 and the ceiling large beam 22 as the beam material. However, the field edge 66 is spaced downward from the beam material. It may be provided at a position. For example, the field edge 66 is supported from above in a state of being suspended by a hanging tree or the like, and the protection plate portion 76 is arranged side by side on the field edge 66. Moreover, when the field edge 66 is being fixed to the hanging tree via the field edge receiver, it is set as the structure by which the protection board part 76 was arrange | positioned side by side at the field edge receiver. In any configuration, the protection plate portion 76 is arranged side by side on the ceiling base.

  (9) In the above embodiment, the first field edge 66a and the second field edge 66b are provided at positions extending along the ceiling large beam 22, but at least one of these field edges 66a, 66b is a ceiling beam. 25 may be provided at a position extending along 25. For example, two beam members orthogonal to each other are used as one ceiling beam 22 and a ceiling beam 25 connected to the ceiling beam 22, and extend along one of the ceiling beam 22 and the ceiling beam 25. Thus, the first field edge 66a is provided, and the second field edge 66b is provided so as to extend along the other side. Even in this configuration, when the wiring hole 75 and the protection plate portion 76 are arranged at the corners of the ceiling beam 22 and the ceiling beam 25, the protection plate portion 76 has the first field edge 66a and the second field edge. It will be arranged side by side with both of 66b.

  (10) In the above embodiment, the wiring hole 75 is disposed above the gap between the sash frame 33 and the column 21. However, the wiring hole 75 is disposed at a position that does not overlap vertically with the gap. It may be. For example, the wiring hole 75 is configured to be disposed above the sash frame 33. Even in this case, the electrical wiring E drawn downward through the wiring hole 75 is laid so as to be turned to the side position of the sash frame 33, thereby passing the electrical wiring E between the sash frame 33 and the column 21. Can do.

  In this case, the protection plate portion 76 is disposed at a position separated from the column 21 in accordance with the position of the wiring hole 75. Further, the protective plate portion 76 may be arranged at a position spaced indoors from the ceiling beam 22 such as the outdoor beam 22a in accordance with the position of the wiring hole 75.

  (11) In the above embodiment, the wiring lead-out portion 71 is provided on the inner wall surface material 55 in the outer wall portion 31, but the wiring lead-out portion 71 may be provided on the outer wall surface material 51.

  (12) In the above embodiment, the wiring hole 75 of the ceiling member 28 is disposed above the outer wall portion 31, but may be disposed above the partition wall. In short, the wiring hole 75 should just be arrange | positioned above the wall body. As a result, the electrical wiring E can be drawn into the wall portion from the ceiling space 42 through the wiring hole 75.

  (13) In the above embodiment, the wiring hole 75 of the ceiling member 28 is disposed above the wall portion such as the outer wall portion 31, but the wiring hole 75 may be disposed outside the wall portion. For example, the wiring hole 75 is configured to be disposed closer to the living space 41 than the inner wall surface material 55. In this configuration, a cover member such as a wiring duct that covers the electrical wiring E drawn from the ceiling back space 42 to the living space 41 through the wiring hole 75 is preferably provided below the wiring hole 75.

  (14) In the above embodiment, the window 32 is a wall opening, but an entrance such as an entrance may be a wall opening. In this case, when the wall opening is an entrance, the door frame provided at the entrance corresponds to the sash frame.

  22 ... Ceiling large beam as beam material, 22a ... Outdoor side large beam as beam material and outdoor side beam material, 22b ... Orthogonal large beam as beam material and orthogonal beam material, 28 ... Ceiling surface material, 31 ... Outer wall as wall part 32, a window portion as a wall opening portion, 33, a sash frame, 41, a living space, 42, a ceiling space, 51, an outer wall surface material as a wall surface material, 53a, an upper horizontal frame as an upper base material, 55 ... Inner wall surface material as a wall material, 61 ... Wall heat insulating part, 62 ... Inside wall space, 66 ... Field edge constituting ceiling base, 66a ... First field edge as first field edge, 66b ... Second field edge 2nd field edge, 68 ... Connection bracket as ceiling side fixing part, 71 ... Wiring lead-out part, 75 ... Wiring hole, 76 ... Protection plate part, 77 ... Communication hole, E ... Electrical wiring.

Claims (9)

  1. A ceiling surface material that divides the living space and the ceiling space vertically
    A ceiling base attached to the beam material and supporting the ceiling surface material,
    The ceiling surface material is provided with a wiring hole for pulling out an electrical wiring laid in the ceiling space,
    In the ceiling back space, a protection plate portion that protects a portion of the ceiling surface material where the wiring hole is formed is provided to overlap the ceiling surface material,
    The protective plate portion is provided with a communication hole that leads to the wiring hole,
    The protective plate portion is arranged side by side on the ceiling base, and is fixed to the ceiling base ,
    The ceiling foundation has a field edge extending along a gap between the ceiling surface material and the beam material;
    The field edge is fixed to the lower surface of the beam member, and the protection plate portion is fixed to a side surface of the field edge,
    The ceiling surface material is provided below two beam members orthogonal to each other,
    At the field edge, a first field edge provided between one of the two beam members and the ceiling surface member and extending along the beam member, the other beam member and the ceiling A second field edge provided between the face material and extending along the beam material,
    The said protection board part is located side by side with both said 1st field edge and said 2nd field edge, and is fixed to each side surface of those 1st field edge and 2nd field edge, The building characterized by the above-mentioned. Ceiling structure.
  2. 2. The building ceiling structure according to claim 1 , wherein a lower surface of the protection plate portion and an upper surface of the ceiling member are joined to each other.
  3. A building comprising the ceiling structure according to claim 1 or 2 ,
    A wall portion having a pair of wall surfaces provided apart from each other;
    The ceiling surface material is disposed above at least one of the pair of wall surface materials,
    The ceiling back space communicates with the separated portion of the pair of wall surface materials through the wiring hole and the communication hole,
    The building according to claim 1, wherein the wall surface material is provided with a wiring lead-out portion capable of pulling out the electric wiring passed through the wiring hole and the communication hole from between the pair of wall surface materials.
  4. The outdoor side beam material extending along the peripheral edge of the ceiling space,
    The wall portion is an outer wall portion that partitions the living space from the outside, and one of the pair of wall surface materials is an inner wall surface material disposed on the living space side, and the other is an outer wall surface disposed on the outdoor side. It is a wall material,
    The ceiling surface material is disposed above the inner wall surface material, and is fixed to the outdoor side beam material in a state facing the lower surface of the outdoor side beam material,
    The building according to claim 3 , wherein the wiring hole is disposed at a position between the outdoor-side beam member and the inner wall surface member in a wall thickness direction.
  5. A ceiling surface material that divides the living space and the ceiling space vertically
    A ceiling base attached to the beam material and supporting the ceiling surface material,
    The ceiling surface material is provided with a wiring hole for pulling out an electrical wiring laid in the ceiling space,
    In the ceiling back space, a protection plate portion that protects a portion of the ceiling surface material where the wiring hole is formed is provided to overlap the ceiling surface material,
    The protective plate portion is provided with a communication hole that leads to the wiring hole,
    The protective plate portion is arranged side by side on the ceiling base, and is fixed to the ceiling base ,
    A wall portion having a pair of wall surfaces provided apart from each other;
    The ceiling surface material is disposed above at least one of the pair of wall surface materials,
    The ceiling back space communicates with the separated portion of the pair of wall surface materials through the wiring hole and the communication hole,
    The wall surface material is provided with a wiring lead-out portion capable of pulling out the electric wiring passed through the wiring hole and the communication hole from between the pair of wall surface materials,
    The outdoor side beam material extending along the peripheral edge of the ceiling space,
    The wall portion is an outer wall portion that partitions the living space from the outside, and one of the pair of wall surface materials is an inner wall surface material disposed on the living space side, and the other is an outer wall surface disposed on the outdoor side. It is a wall material,
    The ceiling surface material is disposed above the inner wall surface material, and is fixed to the outdoor side beam material in a state facing the lower surface of the outdoor side beam material,
    The building is characterized in that the wiring hole is arranged at a position between the outdoor side beam material and the inner wall surface material in a wall thickness direction.
  6. The ceiling foundation has a field edge extending along a gap between the ceiling surface material and the beam material;
    The building according to claim 5 , wherein the field edge is fixed to a lower surface of the beam member, and the protection plate portion is fixed to a side surface of the field edge.
  7. It has a ceiling material that divides the living space and the ceiling space vertically.
    The ceiling surface material is provided with a wiring hole for pulling out an electrical wiring laid in the ceiling space,
    In the ceiling back space, a protection plate portion that protects a portion of the ceiling surface material where the wiring hole is formed is provided to overlap the ceiling surface material,
    The protective plate portion is provided with a communication hole that leads to the wiring hole,
    The lower surface of the protection plate part and the upper surface of the ceiling surface material are joined together ,
    A wall portion having a pair of wall surfaces provided apart from each other;
    The ceiling surface material is disposed above at least one of the pair of wall surface materials,
    The ceiling back space communicates with the separated portion of the pair of wall surface materials through the wiring hole and the communication hole,
    The wall surface material is provided with a wiring lead-out portion capable of pulling out the electric wiring passed through the wiring hole and the communication hole from between the pair of wall surface materials,
    The outdoor side beam material extending along the peripheral edge of the ceiling space,
    The wall portion is an outer wall portion that partitions the living space from the outside, and one of the pair of wall surface materials is an inner wall surface material disposed on the living space side, and the other is an outer wall surface disposed on the outdoor side. It is a wall material,
    The ceiling surface material is disposed above the inner wall surface material, and is fixed to the outdoor side beam material in a state facing the lower surface of the outdoor side beam material,
    The building is characterized in that the wiring hole is arranged at a position between the outdoor side beam material and the inner wall surface material in a wall thickness direction .
  8. The wall portion is an outer wall portion that partitions the living space from the outside, and one of the pair of wall surface materials is an inner wall surface material disposed on the living space side, and the other is an outer wall surface disposed on the outdoor side. It is a wall material,
    The outer wall is provided with a wall opening at a position lower than the ceiling surface material, and a sash frame is attached to the wall opening,
    The sash frame is provided between the columns arranged along the outer wall portion,
    The outer wall portion is
    A wall heat insulating part provided between the pair of wall surface materials;
    A wall space provided between the wall heat insulating portion and the outer wall surface material;
    An upper base material provided above the sash frame in a state of being spanned between the pillars in the inner space, and supporting the outer wall surface material;
    Have
    The building according to any one of claims 3 to 7 , wherein the wiring hole is provided at a position between the upper base material and the inner wall surface material in a wall thickness direction.
  9. The ceiling surface material is fixed to the outdoor side beam material via a ceiling base provided between the ceiling surface material and an outdoor side beam material extending along a peripheral edge of the ceiling space. ,
    The upper base material has a ceiling side fixing portion that overlaps the lower surface of the ceiling surface material and is fixed to the ceiling base material through the ceiling surface material,
    The building according to claim 8, wherein the ceiling-side fixing portion extends along the upper base material.
JP2013042738A 2013-03-05 2013-03-05 Building ceiling structure and building Active JP6166554B2 (en)

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JP2001073493A (en) * 1999-09-08 2001-03-21 Sekisui Chem Co Ltd Floor panel, building unit, and electrical wiring method for unit building
JP2001262725A (en) * 2000-03-15 2001-09-26 Sekisui House Ltd Air-tight structure for ceiling penetration part for wiring
US6820375B2 (en) * 2003-04-16 2004-11-23 Martha C. Meeker Precut utility core for small building structures

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