JP5476345B2 - Face material fixing structure and ceiling construction method - Google Patents

Description

  The present invention relates to a fixing structure for a face material used for a ceiling, a wall, and the like of a building and a method for constructing the ceiling.

  The ceiling, wall, and the like of a building are configured by fastening a plurality of face materials to a base member or the like without a gap. For example, a ceiling structure in a building is composed of a base member and a plurality of ceiling surface members fastened to the base member. Patent Document 1 describes that a ceiling surface material such as a gypsum board is double-fastened up and down while shifting joints. According to this configuration, the joints between the lower facing members and the joints between the upper facing members do not communicate with each other in a straight line, so that heat and flame hardly enter the back of the ceiling.

  FIG. 15 is a diagram showing a conventional ceiling framework, and is a view of the ceiling viewed from the first floor side. FIG. 16 is a diagram illustrating a state in which the ceiling member is fastened to FIG. 15. As shown in FIG. 15, in the ceiling structure in the conventional frame wall construction method, the floor joist arrangement direction may change, for example, when the room is L-shaped in plan view or when a balcony protrudes from the outer wall. is there. For example, as shown in FIG. 15, the conventional ceiling frame 100 includes a cut-off beam 101 that is a boundary where the arrangement direction of the second-floor floor joists changes, and a plurality of first beams arranged in parallel to the turn-up beam 101. A floor joist 102 and a plurality of second floor joists 103 arranged perpendicular to the turning beam 101 are provided. Further, the ceiling frame 100 includes a plurality of first base members 104 disposed orthogonal to the first floor joists 102 and a plurality of first base members 104 disposed orthogonal to the second floor joists 103. Two base members 105 and a turning base member 106 disposed along the turning beam 101 are provided.

  The adjacent first floor joists 102, the adjacent second floor joists 103, the adjacent first base members 104, and the adjacent second base members 105 are disposed so as to have an interval of 455 mm, for example. It is comprised so that a visual lattice shape may be exhibited.

  The ceiling surface material such as gypsum board is formed in 1820 mm × 910 mm according to the dimensions of the building. In other words, since the size of a normal ceiling surface material is an integral multiple of 455 mm (basic module), the position of the base member to fasten the ceiling surface material is moved by 455 mm, or the arrangement direction of the ceiling surface material is changed. Thus, the ceiling material can be fastened while shifting the lower joint and the upper joint. For example, FIG. 16 shows a state where five underlaying surface members 121 and two overlying surface members 122 are fastened. Adjacent underlaying surface members 121 are fastened while being shifted by a half length (910 mm) in the longitudinal direction. On the other hand, the adjacent upper surface material 122 is fastened while being shifted by a quarter length (455 mm) of the lower surface material 121. According to this configuration, the joint G <b> 1 between the lower surface materials 121 is covered with the upper surface material 122.

Japanese Patent Laid-Open No. 11-30007

  Here, for example, if the interval between the adjacent first base members 104 and the second base members 105 can be widened, the number of base members can be reduced, so that the material cost and labor are reduced. can do.

  FIG. 17 is a diagram illustrating a case where the distance between the first floor joists and the second floor joists is 455 mm and the distance between the first ground members and the second ground members is 606 mm. As shown in FIG. 17, in the ceiling structure 100 ′, the distance between the first base member 104 and the second base member 105 is set to 606 mm. In the ceiling structure 100 ′, when the underlaying surface material 121 is fastened with the turning beam 101 interposed therebetween as in the conventional case, the corner portion N of the undercovering surface material 121 does not correspond to the position of the first base member 104. If the corner portion N of the underlaying face material 121 is not fastened to the first base member 104, the corner portion N is in a floating state, so that the adjacent face materials are uneven.

  Therefore, for example, the first base member 104 side is fixed by using the underlaying surface material 121 and the upper surface material 122 side by side, and the second undersurface member 105 side is fixed by using the undersurface material 121 and the cut beam 101 as a boundary. By fixing the upholstery face material 122 for horizontal use, the corners of each face material and the first base member 104 or the second base member 105 can be made to correspond to each other. However, when the face material is fixed in this manner, there is a problem that the joints between the lower surface members 121 and the joints between the upper surface members 122 communicate with each other in the up-down direction. In other words, if the gap between the base members is not an integral multiple of the basic module, the joints between the base members and the joints between the base members are arranged while the base members and the top members are arranged at positions corresponding to the base members. There was a problem that it was difficult to shift the joints of the.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a face material fixing structure and a ceiling construction method that are excellent in fire resistance and can reduce costs.

  In order to solve the above problems, the present invention provides a turning member, a plurality of first support members disposed in parallel with a dimension interval from the turning member, and the first support member with respect to the turning member. On the opposite side, a plurality of second support members that are perpendicularly contacted with the turning member and arranged at a dimension interval, and a turning base member fixed in parallel to the turning member in the turning member, A plurality of first base members orthogonal to the first support member and fixed to the first support member at 4a / 3 dimension intervals, and orthogonal to the second support member at 4a / 3 dimension intervals. A plurality of second base members fixed to the second support member, and the first and second dimensions of the first base so that the longitudinal and transverse dimensions are a rectangle having a long side 4a × short side 2a and the long sides are orthogonal to the first base member. A plurality of first underlaying surfaces fixed to the base member; A plurality of second undercoating materials fixed to the second base member such that the lateral dimension is a rectangle of long side 4a × short side 2a and the long side is orthogonal to the second base member, and a rectangle. A plurality of underlaying adjustment surface members disposed between the first underlaying surface material and the second underlaying surface material and fixed to the turning base member and the second underlaying member; and the first underlaying surface material A plurality of first overstretches fixed to the first base member such that the vertical and horizontal dimensions are a rectangle of long side 4a × short side 2a and the long side is orthogonal to the first base member. The face material and the lower surface of the second undercoating face material are fixed to the second base member so that the vertical and horizontal dimensions are a rectangle of long side 4a × short side 2a and the long side is orthogonal to the second base member. A plurality of second upper facing materials, and the first upper facing material and the first A plurality of upper adjustment surface materials disposed between the two upper surface materials and fixed to the turning base material and the second base material, and between the adjacent first lower surface materials The joint is covered with the first upper face material, and the joint between the adjacent second lower face materials is covered with the second upper face material and the upper adjustment face material, The first upper face material is staggered so that the joints between the short sides of the adjacent first upper face material and the joints between the short sides of the other adjacent first upper face materials are shifted. And the second upper facing material is jointed between the short sides of the adjacent second upper facing material, and the joints between the short sides of the other adjacent second upper facing material. Are arranged in a zigzag pattern so as to be displaced, and the joint between the first underlaying surface material and the underlaying adjustment surface material is the first upholstery surface material and the second upper surface material. Joint between the upholstery surface material, as well, characterized in that it deviates by a predetermined distance in the width direction of joint between the turning-back member and said overlay adjustment surface material and the first overlay surface material.

  According to such a configuration, the joints between the lower surface materials and the joints between the upper surface materials around the turning member can be shifted. As a result, the joints between the lower facing members and the joints between the upper facing members are not communicated with each other, so that heat and flame hardly enter the back side of the facing member. Further, by providing the underlay adjustment surface material and the upholstery adjustment surface material around the turning member, it is possible to fix the undercoat surface material and the upper surface material of a predetermined standard at a position corresponding to the base member. Moreover, by increasing the space | interval of a base member, while being able to reduce a number of members, work effort can be reduced.

  In addition, the two turning base members are arranged side by side in the width direction on the lower surface of the turning member, and the joint between the first underlaying surface material and the underlaying adjusting surface material is provided on one of the turning undersurface members. Formed along the first joint surface material and the joint between the second top surface material, and the joint between the first top surface material and the top adjustment surface material, It is preferable that it is formed along the cut-back base member.

  Although the number of turning base members may be one, the joint can be easily shifted by arranging two turning base members in parallel as in this configuration.

  Further, the present invention provides a turning member, a plurality of first support members arranged in parallel with a dimension interval from the turning member, and on the side opposite to the first supporting member with respect to the turning member, A plurality of second support members that are perpendicularly contacted with the turning member and are disposed at an interval a, and a first support member that is fixed in parallel to the turning member at the first support member adjacent to the turning member. A turning base member, a second turning base member fixed in parallel to the turning member in the turning member, and orthogonal to the first supporting member, the first supporting member at a distance of 4a / 3. A plurality of first base members fixed, a plurality of second base members orthogonal to the second support member and fixed to the second support member at a distance of 4a / 3, and a vertical and horizontal dimension being a long side 4a x short side 2a rectangle A plurality of first undercoating surfaces fixed to the first base member so that the long sides thereof are orthogonal to the base member, and the second base comprising a rectangle having a long side of 4a × short side 2a A plurality of second undersurface members fixed to the second base member so that their long sides are orthogonal to the member, and a rectangular shape disposed between the first undersurface material and the second undersurface material. A plurality of underlaying adjustment surface members that are fixed to the first underlaying member and the second underlaying member, and a lower surface of the first underlaying surface material, wherein the vertical and horizontal dimensions are long side 4a × short side 2a A plurality of first upper face members fixed to the first base member so that the long sides thereof are orthogonal to the first base member, and the lower surfaces of the second lower face members are vertically and horizontally The dimension is a rectangle of long side 4a × short side 2a, and the long side is perpendicular to the second base member. A plurality of second upper face materials fixed to the second base member, and a rectangle formed between the first upper face material and the second upper face material. A plurality of upper adjustment surface members fixed to the member and the second base member, and joints between the adjacent first lower surface materials are covered with the first upper surface material. The joints between the adjacent second undersurface materials are covered with the second upholstery surface material and the upholstery adjustment surface material, and the first upper surface material is adjacent to the first upper surface material. The joints between the short sides of the material are arranged in a staggered manner so that the joints between the short sides of the other adjacent first upper face materials are shifted, and the second upper face materials are adjacent to each other. Arranged in a staggered manner so that the joints between the short sides of the second upholstery face material are shifted from the joints between the short sides of the other adjacent second upholstery face material. The joints of the first underlaying surface material and the underlaying adjustment surface material are formed along the first return base member, and the first upholstery surface material and the second upholstery material are formed. The joints with the face material and the joints between the first upper face material and the upper adjustment face material are formed along the second turning base member.

  According to such a configuration, the joints between the lower surface materials and the joints between the upper surface materials around the turning member can be shifted. As a result, the joints between the lower facing members and the joints between the upper facing members are not communicated with each other, so that heat and flame hardly enter the back side of the facing member. Further, by providing the underlay adjustment surface material and the upholstery adjustment surface material around the turning member, it is possible to fix the undercoat surface material and the upper surface material of a predetermined standard at a position corresponding to the base member. Moreover, by increasing the space | interval of a base member, while being able to reduce a number of members, work effort can be reduced. Further, the joints can be easily shifted by arranging the two turning base members in parallel.

  The present invention also includes a step of disposing a turning member, a step of disposing a plurality of first support members at an interval of a in parallel to the turning member, and the first support for the turning member. A support member disposing step of disposing a plurality of second support members at an interval of a while making a perpendicular contact with the reversing member on the opposite side of the member; and A step of fixing a turning base member parallel to the turning member, a step of fixing a plurality of first base members to the first supporting member at a 4a / 3 dimension interval orthogonal to the first supporting member, and A base member fixing step of fixing a plurality of second base members to the second support member at an interval of 4a / 3 in a direction perpendicular to the second support member, and a vertical and horizontal dimension of long side 4a × short side A plurality of first underlaying materials made of 2a rectangles, The first base material fixing step for fixing the first base material to the first base material so that the long sides thereof are orthogonal to the first base material, and a plurality of base material adjustment surfaces made of rectangles And an underlay adjustment face material fixing step for fixing to the second undercoat member, and a plurality of second undercoat face materials comprising a rectangle having a long side 4a x a short side 2a in the longitudinal and transverse dimensions, A rectangular shape having a length and width dimensions of 4a long side 2a while covering the joints of the adjacent first facet materials adjacent to each other, and a second underlaying surface material fixing step for fixing to the second base member so as to be orthogonal to each other A first upper surface material fixing step of fixing a plurality of first upper surface materials made of zigzag to the first base material, a plurality of upper adjustment surface materials made of a rectangle, the turning base material and the The upper adjustment surface material fixing step for fixing to the second base member, and the adjoining said A second upper surface for covering a joint between the two lower surface materials and fixing a plurality of second upper surface materials made of a rectangle having a long side of 4a and a short side of 2a to the second base member in a staggered manner. A material fixing step, and a joint between the first undercoating surface material and the undercoating adjustment surface material, and a joint between the first overcoating surface material and the upholstery adjustment surface material. The turning member is configured to displace the joint between the first undercoating surface material and the undercoating adjusting surface material, and the joint between the first overcoating surface material and the second overcoating surface material while shifting the direction by a predetermined distance. It is characterized by being shifted by a predetermined distance in the width direction.

  According to this method, the joints between the lower surface members and the joints between the upper surface members around the turning member can be shifted. As a result, the joints between the lower facing members and the joints between the upper facing members are not communicated with each other, so that heat and flame hardly enter the back side of the facing member. Further, by providing the underlay adjustment surface material and the upholstery adjustment surface material around the turning member, it is possible to fix the undercoat surface material and the upper surface material of a predetermined standard at a position corresponding to the base member. Moreover, by increasing the space | interval of a base member, while being able to reduce a number of members, work effort can be reduced.

  Further, in the base member fixing step, the two turning members are juxtaposed in the width direction along the lower surface of the turning member, and the joint between the first underlaying surface material and the underlaying adjusting surface material is one side. Fixing to be formed along the turning base member, joints between the first upper surface material and the second upper surface material, and the first upper surface material and the upper adjustment surface It is preferable that the joint with the material is fixed so as to be formed along the other turning base member.

  Although the number of cut-back base members may be one, according to such a method, joints can be easily displaced by arranging two cut-back base members in parallel.

  The present invention also includes a step of disposing a turning member, a step of disposing a plurality of first support members at an interval of a in parallel to the turning member, and the first support for the turning member. A support member disposing step of disposing a plurality of second support members at an interval of a while making a perpendicular contact with the reversing member on a side opposite to the member, and adjacent to the reversing member Fixing the first turning base member parallel to the turning member in the first support member, and fixing the second turning base member parallel to the turning member in the turning member; Fixing a plurality of first base members to the first support member at a 4a / 3 dimension interval perpendicular to the support member; and orthogonally intersecting the second support member to the first support member at 4a / 3 dimension interval. A plurality of second base parts on the two support members A base member fixing step, and a plurality of first undercoating materials made of a rectangle having a long side of 4a × short side 2a, the long side of the first base member having a long side A first underlaying surface material fixing step for fixing to the first undersurface member so as to be orthogonal to each other, and a plurality of underlay adjustment surface materials made of rectangles are fixed to the first underlayer member and the second undersurface member. The second underlaying surface fixing step and a plurality of second underlaying surface materials having a rectangular shape with a long side of 4a and a short side of 2a, wherein the long side is orthogonal to the second base member. A plurality of first upper surfaces comprising a rectangle having a long side of 4a and a short side of 2a while covering the joints between the adjacent first lower surface materials, and a second lower surface material fixing step of fixing to the member A first upper face material fixing step for fixing the material to the first base member in a zigzag manner; An upper adjustment surface material fixing step of fixing a plurality of upper adjustment surface materials comprising the second turning base material and the second base material, and covering the joints between the adjacent second lower surface materials, vertically and horizontally A second upper facing material fixing step for zigzag-fixing a plurality of second upper facing materials having dimensions of a long side 4a × short side 2a rectangle to the second base member, the first lower A joint between the upholstery surface material and the underlaying adjustment surface material is fixed so as to be formed on the first turnover base member, a joint between the first upper surface material and the second upper surface material, and The joints of the first upper face material and the upper adjustment face material are fixed so as to be formed on the second turning base member.

  According to this method, the joints between the lower surface members and the joints between the upper surface members around the turning member can be shifted. As a result, the joints between the lower facing members and the joints between the upper facing members are not communicated with each other, so that heat and flame hardly enter the back side of the facing member. Further, by providing the underlay adjustment surface material and the upholstery adjustment surface material around the turning member, it is possible to fix the undercoat surface material and the upper surface material of a predetermined standard at a position corresponding to the base member. Moreover, by increasing the space | interval of a base member, while being able to reduce a number of members, work effort can be reduced. Further, the joints can be easily shifted by arranging the two turning base members in parallel.

  According to the fixing method of the face material and the ceiling construction method according to the present invention, the fire resistance is excellent and the cost can be reduced.

It is a schematic top view which shows the floor joist arrangement | positioning process of the construction method of the ceiling which concerns on 1st embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is a schematic plan view which shows the base member fixing process of the construction method of the ceiling which concerns on 1st embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is II sectional drawing of FIG. It is the perspective view which showed the turning beam. It is a schematic plan view which shows the base member fixing process of the construction method of the ceiling which concerns on 1st embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is II-II sectional drawing of FIG. It is a schematic top view which shows the underlaying surface material fixing process of the construction method of the ceiling which concerns on 1st embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is III-III sectional drawing of FIG. It is a schematic top view which shows the upper surface material fixing process of the construction method of the ceiling which concerns on 1st embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is IV-IV sectional drawing of FIG. It is a schematic top view which shows the floor joist arrangement | positioning process of the construction method of the ceiling which concerns on 2nd embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is VV sectional drawing of FIG. It is a figure which shows the underlaying surface material fixing process of the construction method of the ceiling which concerns on 2nd embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is a figure which shows the upper surface material fixing process of the construction method of the ceiling which concerns on 2nd embodiment, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is a figure which shows the conventional ceiling framework, Comprising: It is the figure which looked at the ceiling from the 1st floor side. It is the figure which showed the state by which the ceiling surface material was fastened in FIG. It is a figure which shows the case where the space | interval of 1st floor joists and 2nd floor joists remain at 455 mm, and the space | interval of 1st ground members and 2nd ground members is 606 mm.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, a ceiling construction method and a ceiling surface material fixing structure in the case of constructing a wooden house by a frame wall construction method are exemplified. In more detail, the case where the ceiling of the 1st floor of the two-story house which exhibits L shape in planar view is constructed is illustrated, for example. First, the ceiling construction method of this embodiment will be described.

  In the ceiling construction method according to the present embodiment, a floor joist arrangement step for passing floor joists, a base member fixing step for fixing a base member to the floor joists, and an underlay surface material fixing for fastening an underlay material to the base member A process and an upper surface material fixing step of fastening the upper surface material to the base member. In addition, although it joins to the joining part of each member suitably using a nail and a screw, the concrete description and illustration of a nail and a screw are abbreviate | omitted except a main part.

  FIG. 1 is a schematic plan view showing a floor joist arrangement process of the ceiling construction method according to the first embodiment, and is a view of the ceiling as viewed from the first floor side. As shown in FIG. 1, in the floor joist arrangement step, the first floor joist 1, the second floor joist 2, the turning beam 3, and the base receiving member 4 are bridged between a pair of wall assemblies (not shown). The first floor joist 1 corresponds to the first support member in the claims, the second floor joist 2 corresponds to the second support member, and the turning beam 3 corresponds to the turning member.

  In the present embodiment, since the building has an L shape in plan view, the first floor joist 1 and the second floor joist 2 are fixed so that the arrangement direction of the second floor joist 2 is 90 degrees with the turning beam 3 as a boundary. That is, in the floor joist arrangement step, the first floor joist 1 is arranged in parallel to the turning beam 3, and the second floor joist 2 is made to the turning beam 3 with its end face being in contact with the turning beam 3. It is arranged to be 90 degrees. The dimension between the first floor joists 1 and 1, the dimension between the first floor joists 1 and the turning beam 3, and the dimension between the second floor joists 2 and 2 are set to 455 mm, for example. The turning beam 3 is wider than the first floor joists 1 and the second floor joists 2. The ground receiving member 4 is attached next to the turning beam 3. In addition, when the turning beam 3 is wider, the base receiving member 4 may be omitted.

  FIG. 2 is a schematic plan view showing a base member fixing step of the ceiling construction method according to the first embodiment, and is a view of the ceiling as viewed from the first floor side. 3 is a cross-sectional view taken along the line II of FIG. FIG. 4 is a perspective view showing a turning beam.

  As shown in FIGS. 2 and 3, in the base member fixing step, first, the first turning base member 11 and the second turning base member 12 are fixed to the lower surface of the turning beam 3. The first turn-back base member 11 and the second turn-back base member 12 are metal members each having a crank shape in cross section, and are base members for fixing the ceiling surface material. The first turn-back base member 11 and the second turn-back base member 12 have the same shape. The first turn-back base member 11 and the second turn-back base member 12 are arranged to face each other so as to be line-symmetric with respect to a line in the vertical direction.

  As shown in FIG. 4, the first turning base member 11 and the second turning base member 12 are parallel to the first fixing plate portion 13 fixed to the turning beam 3 and the first fixing plate portion 13. And a connecting plate portion 15 for connecting the first fixing plate portion 13 and the second fixing plate portion 14 to each other. The first fixed plate portion 13 is a portion fixed to the turning beam 3. The second fixed plate portion 14 is a portion to which the ceiling surface material is fixed. The first turn-back base member 11 and the second turn-back base member 12 support the ceiling surface material in a cantilever manner, and the connection plate portion 15 vibrates to prevent the second floor vibration from being transmitted to the first floor. it can.

  FIG. 5 is a schematic plan view showing the base member fixing step of the ceiling construction method according to the first embodiment, and is a view of the ceiling from the first floor side. 6 is a cross-sectional view taken along the line II-II in FIG. Subsequently, in the base member fixing step, the first base member 21 and the second base member 22 are fixed.

  As shown in FIGS. 5 and 6, in the base member fixing step, the plurality of first base members 21 are fixed to the first floor joists 1 so as to be orthogonal to the first floor joists 1. The first base member 21 is a member having the same shape as that of the first return base member 11 described above. One end of the first base member 21 is also fixed to the base receiving member 4. The dimension between the first base members 21 and 21 is set to 606 mm, for example.

  Subsequently, in the base member fixing step, the plurality of second base members 22 are fixed to the second floor joists 2 so as to be orthogonal to the second floor joists 2. The second base member 22 is a member having the same shape as that of the first return base member 11 described above. The dimension between the second base members 22 and 22 is set to 606 mm, for example. Moreover, the dimension between the 2nd base member 22 and the 2nd turning back base member 12 is set to 606 mm, for example.

  In the base member fixing step, the order of fixing the base members is not limited.

  FIG. 7 is a schematic plan view showing the underlaying surface material fixing step of the ceiling construction method according to the first embodiment, and is a view of the ceiling from the first floor side. 8 is a cross-sectional view taken along the line III-III in FIG. As shown in FIGS. 7 and 8, in the underlaying surface material fixing step, first, a plurality of first underlaying surface materials 31 are fastened to the first base member 21 without gaps. As the first underlaying surface material 31, a material of 1820 mm × 910 mm (hereinafter also referred to as “standard size”) is used for vertical use. The plate thickness may be set as appropriate, but is set to, for example, 12 mm in this embodiment.

  Specifically, in the underlaying face material fixing step, the four first base members 21 correspond to each other while the longitudinal direction of the first underlaying face material 31 and the longitudinal direction of the first base member 21 are orthogonal to each other. And fasten with screws K. As shown in FIG. 8, for the first underlaying surface material 31 adjacent to the cut-back beam 3, the end portion of the first underside surface material 31 and the second fixing plate portion 14 of the first turnover base member 11 are connected. Fasten with screws K. Adjacent first undersurface materials 31, 31 are not shifted from each other, and are fastened so that the joint G1 between the first undersurface materials 31, 31 has a lattice shape.

  Subsequently, in the underlaying surface material fixing step, the underlaying adjustment surface material 32 is completely turned over between the base member 11 and the second base member 22 and fastened with screws K, respectively. The underlaying adjustment surface material 32 has a longitudinal dimension of 910 mm, a lateral dimension of less than 1820 mm, and is appropriately set to a length that can be fastened to the first return base member 11 and the second base member 22.

  In the underlaying surface material fixing step, a plurality of underlay adjustment surface materials 32 are fastened in parallel with the turning beam 3 immediately below the turning beam 3. Further, the joint G2 between the underlay adjustment surface material 32 and the first undersurface material 31 is arranged so as to be formed along the center portion in the width direction of the second fixed plate portion 14 of the first return base member 11. Set up. Furthermore, the joint G3 between the underlay adjustment face members 32 and 32 is disposed so as to be shifted from the joint G1 in the lateral direction between the first underlay face members 31 and 31.

  Subsequently, in the underlaying face material fixing step, the second underlaying face material 33 is fixed to the second base member 22. As the second underlaying surface material 33, a standard size is used sideways. The plate thickness is equivalent to that of the first underlaying face material 31.

  In the underlaying face material fixing step, specifically, the four second base members 22 are positioned so as to correspond to each other while the longitudinal direction of the second undercoat face material 33 and the longitudinal direction of the second base member 22 are orthogonal to each other. Fasten with screws K. The second underlaying surface material 33 is fastened so that there is no gap while aligning with the adjacent underlaying adjustment surface material 32. As shown in FIG. 8, the joint G <b> 4 between the underlay adjustment surface material 32 and the second underlay surface material 33 is formed along the center portion in the width direction of the second fixing plate portion 14 of the second base member 22. It arranges in. In addition, although a specific drawing is omitted, in the underlaying face material fixing step, the vertical joint G5 between the second underlaying face members 33 and 33 is in the width direction of the second fixing plate portion 14 of the second base member 22. It arrange | positions so that it may form along the center. As a result, the joints G3, G4, and G5 have a lattice shape in plan view.

  In addition, in the gap portion between the first underlaying surface material 31, the underlaying adjustment surface material 32, the second underlaying surface material 33, and each wall assembly (not shown), an underlaying surface material is appropriately matched to the size of the gap. Fasten. About the order which fastens the 1st underlay surface material 31, the underlay adjustment surface material 32, and the 2nd underlay surface material 33, it is not limited to an above-described method.

  FIG. 9 is a schematic plan view showing the upper surface material fixing step of the ceiling construction method according to the first embodiment, and is a view of the ceiling from the first floor side. 10 is a cross-sectional view taken along the line IV-IV in FIG. As shown in FIGS. 9 and 10, in the upper surface member fixing step, first, a plurality of first upper surface materials 41 are screwed onto the first base member 21 from the bottom of the first lower surface material 31. Fasten with. The first upholstery surface material 41 uses a standard size for vertical use. The plate thickness may be set as appropriate, but is set to, for example, 12 mm in this embodiment.

  The first upholstery members 41a and 41b arranged immediately below the turning beam 3 correspond to the second fixed plate portion 14 of the second turning base member 12 and the four first base members 21. Fasten with screws K while positioning. The other first upper face material 41 is positioned so that the four first base members 21 correspond to each other, and the first upper face materials 41, 41 adjacent in the lateral direction are connected to each other as the first base member. Fasten with 21 screws while shifting by 606 mm. Accordingly, the plurality of first upper facing members 41 are arranged in a staggered manner while covering the joint G1.

  Subsequently, in the upper surface material fixing step, the upper surface material 42 and the second upper surface material 43 are fastened from below the lower surface material 32 and the second surface material 33. As the upper adjustment surface material 42, a material having a vertical dimension of 910 mm and a horizontal dimension of 1212 mm is used. As the second upper facing material 43, a standard size is used sideways. The plate thickness of the upper adjustment surface material 42 and the second upper surface material 43 is equal to that of the first upper surface material 41.

  In the upper surface member fixing step, the upper adjustment surface members 42a and 42b disposed adjacent to the turning beam 3 are spaced by 910 mm in the vertical direction, and the second fixing plate portion 14 of the second turning base member 12 and The two second base members 22 are positioned so as to correspond to each other, and are fastened with screws K, respectively. Furthermore, the second upper plate members 43 a, 43 b, and 43 c disposed adjacent to the turning beam 3 are alternately arranged with the upper adjustment surface member 42 and the second fixing plate portion of the second turning base member 12. 14 and the three second base members 22 are positioned so as to correspond to each other and fastened with screws K, respectively.

  In the upper adjustment surface material fixing step, the joint H3 between the first upper surface materials 41a and 41b, the upper adjustment surface materials 42a and 42b, and the second upper surface materials 43a and 43b is used as the second turning base member 12. It arrange | positions so that it may form along the center part of the width direction of the 2nd fixing plate part 14 of this.

  Further, the second upper surface members 43d and 43e are positioned next to the upper adjustment surface materials 42a and 42b without any gaps, and are fastened to the second base member 22 with screws K, respectively. In the upper face member fixing step, the joint H4 between the upper adjustment face members 42a and 42b and the second upper face members 43d and 43e is the central portion in the width direction of the second fixing plate portion 14 of the second base member 22. It arrange | positions so that it may form along.

  The other second upper face material 43 is fastened next to the second upper face materials 43a, 43b, 43c, 43d, 43e without any gaps. Thereby, the upper adjustment surface material 42 and the second upper surface material 43 are arranged in a staggered manner while covering the joints G3, G4, and G5. Further, the joint H4 between the upper adjustment face members 42a and 42b and the second upper face members 43d and 43e and the joint H5 between the second upper face members 43 are not aligned but shift.

  It should be noted that the upper surface material 41 is appropriately fastened to the gaps between the first upper surface material 41, the upper surface adjustment surface material 42, the second upper surface material 43, and each wall assembly according to the size of the gap as appropriate. wear. About the order which fastens the 1st upper surface material 41, the upper surface adjustment surface material 42, and the 2nd upper surface material 43, it is not limited to an above-described method. Through the above steps, the ceiling structure T according to the present embodiment is constructed.

  According to the ceiling structure T, the distance between the first base members 21 and 21 and the distance between the second base members 22 and 22 can be a 606 mm module wider than 455 mm, so the number of parts can be reduced. In addition, it can reduce the labor.

  Further, when the disposition direction of the first floor joist 1 and the disposition direction of the second floor joist 2 change with the turning beam 3 as a boundary, the distance between the first base members 21 and 21 and the second base member Even if the distance between the 22 and 22 is a 606 mm module, the joints of the lower surface material and the joints of the upper surface material can be shifted.

  Specifically, as shown in FIG. 9, the joint G <b> 2 of the first undercoating face material 31 and the undercoating adjustment face material 32, the first overcoating face material 41, the upholstery adjusting face material 42, and the second overcoating material. The joint H <b> 3 with the face material 43 is displaced in the width direction of the turning beam 3. Therefore, the joints G1, G2, G3, G4, and G5 formed by the first underlaying surface material 31, the underlaying adjustment surface material 32, and the second underlaying surface material 33 are the first upholstery surface material 41 and the upholstery adjustment. In a state where the joints H1, H2, H3, H4, and H5 formed by the face material 42 and the second upper face material 43 are not linearly communicated in the vertical direction, the first upper face material 41 and the upper adjustment face material 42 and the second upper facing material 43.

  In other words, the first turning base member 11 and the second turning base member 12 are provided on the turning beam 3, and the straight joint G <b> 2 of the first underlaying surface material 31 and the underlaying adjusting surface material 32, and the first upper covering material are provided. The face material 41 and the straight joint H3 of the upper adjustment face material 42 and the second upper face material 43 are shifted in the width direction. As a result, the joints between the lower facing members and the joints between the upper facing members are not communicated with each other, so that heat and flame hardly enter the back side of the facing member. Thereby, fireproof performance can be improved.

  Moreover, by using the underlay adjustment face material 32, all four corners of the first undercoat face material 31 and the second undercoat face material 33 of the standard size (1820 × 910) are all in the first base member 21 or the second base member 21. The base member 22 can be disposed without a gap.

  Further, by using the upper adjustment surface material 42, the four corners of the first upper surface material 41 and the second upper surface material 43 of the standard size are all in the first base member 21 or the second base member 22. And can be arranged in a zigzag pattern without any gaps.

  In this embodiment, the reference module is 455 mm (a dimension), the standard size is 1820 (4a) × 910 (2a), and the dimension between the base members is 606 mm (4a / 3), but this is not limitative. It is not something. What is necessary is just to set suitably about a dimension according to the magnitude | size of a building.

  In the first embodiment, the base member having a crank shape in cross section is used. However, the present invention is not limited to this, and any shape may be used as long as the ceiling surface material can be fastened. In the first embodiment, the first turning base member 11, the second turning base member 12, and the two base members are provided below the turning beam 3, but these may be configured by a single base member. Good. In the present embodiment, the joint G2 is formed along the first turnover base member 11, and the joint H3 is formed along the second turnover base member 12. However, the first turnover base member 11 is not formed. The joint H3 may be formed along the second turning base member 12, and the joint G2 may be formed along the second turning base member 12.

  In the first embodiment, the underlay adjustment surface material 32 is stretched over the first turnover base member 11 and the second base member 22 adjacent to the first turnover base member 11. The horizontal length of the second base member 11 may be further increased by 606 mm, and the first base member 11 and the second base member 22 adjacent to the first base member 11 may be bridged. In this case, the length of the adjacent second underlaying material in the lateral direction may be shortened by 606 mm.

[Second Embodiment]
Next, a ceiling construction method according to the second embodiment of the present invention will be described. The second embodiment is different from the first embodiment in that the first return base member 11 is fixed to the first floor joist 1.

  In the ceiling construction method according to the second embodiment, a floor joist arranging step for passing the floor joist, a base member fixing step for fixing the base member to the floor joist, and an underlaying surface material for fastening the underlaying material to the base member A fixing step and an upper surface material fixing step of fastening the upper surface material to the base member are performed.

  FIG. 11 is a schematic plan view showing the floor joist arrangement step of the ceiling construction method according to the second embodiment, and is a view of the ceiling as viewed from the first floor side. 12 is a cross-sectional view taken along the line VV in FIG. FIG. 13 is a diagram showing an underlaying surface material fixing step of the ceiling construction method according to the second embodiment, and is a view of the ceiling as viewed from the first floor side. FIG. 14 is a diagram showing an upper face material fixing step of the ceiling construction method according to the second embodiment, and is a view of the ceiling as viewed from the first floor side.

  As shown in FIG. 11, in the floor joist arrangement step, the first floor joist 1, the second floor joist 2, and the turn-back beam 3 are arranged as in the first embodiment. Then, as shown in FIG. 12, the base receiving member 4 is attached to the first floor joist 1 ′ adjacent to the turning beam 3. The dimension between the first floor joists 1 and 1, the dimension between the first floor joists 1 'and the turning beam 3, and the dimension between the second floor joists 2 and 2 are set to 455 mm, for example.

  As shown in FIGS. 11 and 12, in the base member fixing step, first, the first base member 11 is fixed to the lower surface of the first floor joist 1 'in parallel with the first floor joist 1'. Subsequently, the plurality of first base members 21 are fixed so as to be orthogonal to the first floor joists 1. One end of the first base member 21 is also fixed to the base receiving member 4. The dimension between the first base members 21 and 21 is set to 606 mm, for example.

  Subsequently, the second turning base member 12 is fixed to the lower surface of the turning beam 3 in parallel with the turning beam 3. The dimension between the second cut-back base member 12 and the first turn-back base member 11 is set to 455 mm, for example. Then, the plurality of second base members 22 are fixed so as to be orthogonal to the second floor joists 2. The dimension between the second base members 22 and 22 is set to 606 mm, for example.

  As shown in FIG. 13, in the underlaying face material fixing step, the plurality of first underlaying face materials 31 are fastened to the first base member 21 without any gaps. The first underlaying surface material 31 uses a standard size for vertical use. The plate thickness may be set as appropriate, but is set to, for example, 12 mm in this embodiment.

  Specifically, the first underlaying surface materials 31 a and 31 b are all turned back along the base member 11, while the longitudinal direction of the first underlaying surface materials 31 a and 31 b and the longitudinal direction of the first base member 21 are Are orthogonal. Further, the first underlaying surface materials 31a, 31b and the four first undersurface members 21 are positioned so as to correspond to each other, and the first undersurface material 31a, 31b, the first undersurface member 21 and the first undersurface member 21 The return member 11 is fastened with screws. In the other first undersurface material, the long sides of the adjacent first undersurface materials 31 and 31 are combined so that the joint G1 between the first undersurface materials 31 and 31 has a lattice shape. Fasten.

  Subsequently, in the underlaying surface material fixing step, the plurality of underlaying adjustment surface materials 32 are fastened without gaps. The under-adjustment surface member 32 has a vertical dimension of 910 mm × a horizontal dimension of 2577 mm. The plate thickness is equivalent to that of the first underlaying face material 31. One end side of the underlaying adjustment surface member 32 is made to correspond to the second base member 22 ′ across the second turning base member 12 and the second base member 22 ″ while corresponding to the first base member 11. Then, the underlaying adjustment surface material 32, the first turn-back base member 11, the second cut-back base member 12, and the second base members 22 'and 22 "are fastened with screws. The joints G <b> 2 between the first underlaying surface materials 31 a and 31 b and the underlaying adjustment surface material 32 are disposed so as to be formed along the first turnover base member 11.

  Subsequently, in the underlaying face material fixing step, the plurality of second underlaying face materials 33 are fastened to the second base member 22 without gaps. As the second underlaying surface material 33, a standard size is used sideways. The plate thickness of the second undersurface material 33 is equivalent to that of the first undersurface material 31.

  Specifically, while the longitudinal direction of the second underlaying material 33 and the longitudinal direction of the second base member 22 are orthogonal to each other, the four second base members 22 are positioned so as to correspond and fastened with screws K, respectively. . The joint G4 between the second underlaying surface material 33 and the underlaying adjustment surface material 32 is disposed so as to be formed along the second base member 22 '.

  In addition, in the gap portion between the first underlaying surface material 31, the underlaying adjustment surface material 32, the second underlaying surface material 33, and each wall assembly (not shown), an underlaying surface material is appropriately matched to the size of the gap. Fasten. About the order which fastens the 1st underlay surface material 31, the underlay adjustment surface material 32, and the 2nd underlay surface material 33, it is not limited to an above-described method.

  As shown in FIG. 14, in the upper surface member fixing step, a plurality of first upper surface members 41 are fastened to the first base member 21 from below the first lower surface member 31 with screws. The first upholstery surface material 41 uses a standard size for vertical use. Although the plate | board thickness of the 1st upper surface material 41 should just be set suitably, in this embodiment, it sets to 12 mm, for example.

  The first upholstery surface material 41a disposed immediately below the turning beam 3 has four pieces while straddling the first turning foundation member 11 and corresponding to the second turning foundation member 12 and the first floor joist 1. The first base members 21 are positioned so as to correspond to each other and fastened with screws. The other first upper face material 41 is positioned so that the four first base members 21 correspond to each other, and the first upper face materials 41, 41 adjacent in the lateral direction are connected to each other as the first base member. Fasten with 21 screws while shifting by 606 mm. Thus, the plurality of first upper facing members 41 are arranged in a staggered manner while covering the joint G1 between the first lower facing members 31, 31.

  Subsequently, in the upper surface member fixing step, the upper surface material 42 and the second upper surface material 43 are fastened to the second base member 22 from below the lower surface material 32 and the second surface material 33. . As the upper adjustment surface material 42, a material having a vertical dimension of 910 mm and a horizontal dimension of 606 mm is used. As the second upper facing material 43, a standard size is used sideways. The plate thicknesses of the upper adjustment surface material 42 and the second upper surface material 43 are equal to those of the second upper surface material 41.

  In the upper face member fixing step, the upper adjustment face members 42a and 42b disposed immediately below the turning beam 3 are opened by 910 mm in the vertical direction, and the second turning base member 12 and the second base member 22 ′ are formed. Position them to correspond and fasten with screws. Furthermore, between the upper adjustment surface members 42a and 42b, the second upper surface member 43a disposed immediately below the turning beam 3 is replaced by the second turning base member 12 and the three second base members 22. Position them to correspond and fasten with screws. The other second upper face material 43 is fastened next to the upper adjustment face material 42 and the second upper face material 43 without a gap. Thus, the plurality of second upper facing members 43 are arranged in a staggered manner while covering the joints G4 and G5 between the second lower covering members 33 and 33.

  According to the ceiling structure T1 thus formed, the distance between the first base members 21, 21 and the distance between the second base members 22, 22 can be a 606 mm module wider than 455 mm. The number of parts can be reduced, and the labor for the operation can be reduced.

  Further, when the disposition direction of the first floor joist 1 and the disposition direction of the second floor joist 2 change with the turning beam 3 as a boundary, the distance between the first base members 21 and 21 and the second base member Even if the distance between the 22 and 22 is a 606 mm module, the joints of the lower surface material and the joints of the upper surface material can be shifted.

  Specifically, as shown in FIG. 14, the joint G <b> 2 of the first underlaying surface material 31 and the underlaying adjustment surface material 32, the first upholstery surface material 41, the upholstery adjustment surface material 42, and the second upper surface The joint H3 with the upholstery material 43 is shifted in the width direction around the turning beam 3. Therefore, the joints G1, G2, G3, G4, and G5 formed by the first underlaying surface material 31, the underlaying adjustment surface material 32, and the second underlaying surface material 33 are the first upholstery surface material 41 and the upholstery adjustment. The first upper face member 41, the upper adjustment face member 42, and the second upper face do not communicate with the joints H1, H3, H4 formed by the face member 42 and the second upper face member 43 in a straight line in the vertical direction. Covered by the upholstery material 43.

  In other words, the first floor joist 1 ′ adjacent to the turning beam 3 is provided with the first turning base member 11 and the turning beam 3 is provided with the second turning base member 12 to adjust the first underlaying surface material 31 and the underlaying. A straight joint G2 with the face member 32, a joint H3 with the first upper face member 41 and the upper adjustment face member 42, and a joint H3 with the first upper face member 41 and the second upper face member 43. Are shifted in the width direction. As a result, the joints between the lower facing members and the joints between the upper facing members are not communicated in a straight line in the vertical direction, so that heat and flame are difficult to enter the back side of the face member. Thereby, fireproof performance can be improved.

  Further, by using the underlay adjustment face material 32, the four corners of the standard-size first undercoat face material 31 and the second undercoat face material 33 all correspond to the first base member 21 or the second base member 22. It can arrange | position without gap so that.

  Further, by using the upper adjustment surface material 42, the four corners of the first upper surface material 41 and the second upper surface material 43 of the standard size are all in the first base member 21 or the second base member 22. And can be arranged in a zigzag pattern without any gaps.

  Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the case where the ceiling is constructed is illustrated, but in the present invention, the wall may be constructed with a wall material and a pillar. In addition, the numbers of joists (support members), base members, and face materials described in the embodiments are merely examples, and do not limit the present invention.

1 First floor joists (first support member)
2 Second floor joists (second support member)
3 Turning beams (turning members)
DESCRIPTION OF SYMBOLS 4 Substrate receiving member 11 First return base member 12 Second turning base member 13 First fixing plate portion 14 Second fixing plate portion 15 Connection plate portion 21 First base member 22 Second base member 31 First undercoating surface Material 32 Subsurface adjustment surface material 33 Second undersurface material 41 First upper surface material 42 Upper adjustment surface material 43 Second upper surface material G1-G5 Joint H1-H5 Joint T Ceiling structure

Claims (6)

A turning member,
A plurality of first support members arranged in parallel with a dimension interval from the turning member;
A plurality of second support members that are perpendicular to the turning member and disposed at a dimension intervals on the opposite side of the turning member to the first supporting member;
A turning base member fixed in parallel to the turning member in the turning member;
A plurality of first base members that are orthogonal to the first support member and fixed to the first support member at 4a / 3 dimension intervals;
A plurality of second base members orthogonal to the second support member and fixed to the second support member at a 4a / 3 dimension interval;
A plurality of first undercoating materials that are formed of a rectangle having a long side of 4a and a short side of 2a and that are fixed to the first base member such that the long sides are orthogonal to the first base member;
A plurality of second undercoating materials that are formed of a rectangle having a long side of 4a and a short side of 2a and are fixed to the second base member so that the long side is orthogonal to the second base member;
A plurality of underlaying adjustment surface materials that are rectangular and are arranged between the first underlaying surface material and the second underlaying surface material, and are fixed to the turning base member and the second underlaying member;
On the lower surface of the first undercoating surface material, the vertical and horizontal dimensions are long side 4a × short side 2a rectangles, and are fixed to the first base member so that the long sides are perpendicular to the first base member. A plurality of first upper facing materials,
On the lower surface of the second underlaying surface material, a plurality of dimensions, which are rectangular with a long side of 4a and a short side of 2a, are fixed to the second base member so that the long side is orthogonal to the second base member. A second upholstery surface material;
A plurality of upper adjustment surface materials which are rectangular and are disposed between the first upper surface material and the second upper surface material and which are fixed to the turning base material and the second base material. And
The joints between the adjacent first undersurface materials are covered with the first upper surface material,
The joints between the adjacent second undersurface materials are covered with the second upper surface material and the upper adjustment surface material,
The first upper facing material is staggered so that the joints between the short sides of the adjacent first upper facing material are shifted from the joints between the short sides of the other adjacent first upper facing material. Are arranged in the
The second upper facing material is staggered so that the joints between the short sides of the adjacent second upper facing material are shifted from the joints between the short sides of the other adjacent second upper facing material. Are arranged in the
The joints of the first and second adjustment surface materials are joints of the first and second upper surface materials, and the first and second upper surface materials. A fixing structure for a face material, characterized by being offset by a predetermined distance in the width direction of the turning member from the joint with the adjustment face material. The two turning base members are juxtaposed in the width direction on the lower surface of the turning member,
The joint of the first underlaying surface material and the underlaying adjustment surface material is formed along one of the turning base members,
The joints of the first and second upper face materials and the first and second upper face materials are formed along the other turning base member. The face material fixing structure according to claim 1, wherein the face material fixing structure is provided. A turning member,
A plurality of first support members arranged in parallel with a dimension interval from the turning member;
A plurality of second support members that are perpendicular to the turning member and disposed at a dimension intervals on the opposite side of the turning member to the first supporting member;
A first turnover base member fixed in parallel to the turning member in the first support member next to the turning member;
A second turning base member fixed in parallel to the turning member in the turning member;
A plurality of first base members that are orthogonal to the first support member and fixed to the first support member at 4a / 3 dimension intervals;
A plurality of second base members orthogonal to the second support member and fixed to the second support member at a 4a / 3 dimension interval;
A plurality of first undercoating materials that are formed of a rectangle having a long side of 4a and a short side of 2a and that are fixed to the first base member such that the long sides are orthogonal to the first base member;
A plurality of second undercoating materials that are formed of a rectangle having a long side of 4a and a short side of 2a and are fixed to the second base member so that the long side is orthogonal to the second base member;
A plurality of underlaying adjustment surface materials that are rectangular and are disposed between the first underlaying surface material and the second underlaying surface material, and are fixed to the first return base member and the second undercoat member;
On the lower surface of the first undercoating surface material, the vertical and horizontal dimensions are long side 4a × short side 2a rectangles, and are fixed to the first base member so that the long sides are perpendicular to the first base member. A plurality of first upper facing materials,
On the lower surface of the second underlaying surface material, a plurality of dimensions, which are rectangular with a long side of 4a and a short side of 2a, are fixed to the second base member so that the long side is orthogonal to the second base member. A second upholstery surface material;
A plurality of upper adjustment surface materials that are rectangular and are disposed between the first upper surface material and the second upper surface material, and are fixed to the second turning base member and the second base member; Have
The joints between the adjacent first undersurface materials are covered with the first upper surface material,
The joints between the adjacent second undersurface materials are covered with the second upper surface material and the upper adjustment surface material,
The first upper facing material is staggered so that the joints between the short sides of the adjacent first upper facing materials are shifted from the joints between the short sides of the other adjacent first upper facing materials. Arranged,
The second upper face material is staggered so that the joints between the short sides of the adjacent second upper face material are shifted from the joints between the short sides of the other adjacent second upper face materials. Arranged,
The joints of the first underlaying surface material and the underlaying adjustment surface material are formed along the first return base member,
The joints between the first upper surface material and the second upper surface material, and the joints between the first upper surface material and the upper adjustment surface material are formed along the second turning base member. The fixing structure of the face material characterized by being made. A step of disposing a turning member, a step of disposing a plurality of first support members at intervals of a in parallel to the turning member, and a side opposite to the first supporting member with respect to the turning member. A support member disposing step of performing a step of disposing a plurality of second support members at a dimension intervals while abutting perpendicularly to the turning member;
A step of fixing the turning base member parallel to the turning member in the turning member; and fixing a plurality of first base members to the first supporting member at a 4a / 3 dimension interval perpendicular to the first supporting member. And a base member fixing step of performing a step of fixing a plurality of second base members to the second support member at a 4a / 3 dimension interval orthogonal to the second support member,
A plurality of first underlaying materials each having a longitudinal and lateral dimension of a rectangle having a long side 4a × short side 2a are fixed to the first base member so that the long sides are orthogonal to the first base member. One underlaying surface material fixing process;
Underlay adjustment face material fixing step of fixing a plurality of underlay adjustment face materials made of rectangles to the turning base member and the second base member;
A second undersurface for fixing a plurality of second undersurface members, each having a length and width dimension of a long side 4a × short side 2a rectangle, to the second base member so that the long sides are perpendicular to the second base member. Material fixing process;
A plurality of first upholstery face materials each having a rectangular shape with a long side 4a and a short side 2a are fixed to the first base member in a zigzag manner while covering joints between the adjacent first underlay face materials. A first upper facing material fixing step,
An upper adjustment surface material fixing step of fixing a plurality of upper adjustment surface materials made of a rectangle to the turning base member and the second base member;
A plurality of second upper face materials each having a rectangular shape with a long side 4a × short side 2a are fixed to the second base member in a staggered manner while covering joints between the adjacent second under face materials. Including two upper facing face material fixing step,
While shifting the joints of the first undercoating material and the undercoating adjustment surface material and the joints of the first overcoating surface material and the overcoating adjustment surface material by a predetermined distance in the width direction of the turning member. ,
The joints of the first undersurface material and the underlay adjustment surface material and the joints of the first upper surface material and the second upper surface material are shifted by a predetermined distance in the width direction of the turning member. A ceiling construction method characterized by that. In the base member fixing step, the two turning members are juxtaposed in the width direction along the lower surface of the turning member,
The joint of the first underlaying surface material and the underlaying adjustment surface material is fixed so as to be formed along one of the turning base members,
The joints of the first upper surface material and the second upper surface material, and the joints of the first upper surface material and the upper adjustment surface material are formed along the other turning base member. The ceiling construction method according to claim 4, wherein the ceiling construction method is fixed as described above. A step of disposing a turning member, a step of disposing a plurality of first support members at intervals of a in parallel to the turning member, and a side opposite to the first supporting member with respect to the turning member. A support member disposing step of performing a step of disposing a plurality of second support members at a dimension intervals while abutting perpendicularly to the turning member;
A step of fixing the first turning base member parallel to the turning member in the first support member adjacent to the turning member and fixing the second turning base member parallel to the turning member in the turning member. And a step of fixing a plurality of first base members to the first support member at a 4a / 3 dimension interval orthogonal to the first support member, and 4a / 3 orthogonal to the second support member. A base member fixing step of performing a step of fixing a plurality of second base members to the second support member at dimensional intervals;
A plurality of first underlaying materials each having a longitudinal and lateral dimension of a rectangle having a long side 4a × short side 2a are fixed to the first base member so that the long sides are orthogonal to the first base member. One underlaying surface material fixing process;
Underlay adjustment face material fixing step of fixing a plurality of underlay adjustment face materials made of a rectangle to the first return base member and the second base member;
A second undersurface for fixing a plurality of second undersurface members, each having a length and width dimension of a long side 4a × short side 2a rectangle, to the second base member so that the long sides are perpendicular to the second base member. Material fixing process;
A plurality of first upholstery face materials each having a rectangular shape with a long side 4a and a short side 2a are fixed to the first base member in a zigzag manner while covering joints between the adjacent first underlay face materials. A first upper facing material fixing step,
An upper adjustment surface material fixing step of fixing a plurality of upper adjustment surface materials made of a rectangle to the second turning base member and the second base member;
A plurality of second upper face materials each having a rectangular shape with a long side 4a × short side 2a are fixed to the second base member in a staggered manner while covering joints between the adjacent second under face materials. Including two upper facing face material fixing step,
The joints of the first underlaying surface material and the underlaying adjustment surface material are fixed so that they are formed on the first return base member,
The joint between the first upper surface material and the second upper surface material, and the joint between the first upper surface material and the upper adjustment surface material are formed on the second turning base member. A ceiling construction method characterized by being fixed to the ceiling.

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