Ceiling support structure

Abstract

To provide a ceiling support structure capable of inexpensively suppressing vibrations transmitted from a structural material to a ceiling.SOLUTION: A ceiling support structure 12 includes a ceiling joist 20 to which a ceiling board 25 is to be attached; and a runner 22, 22a, 22b that is formed of a metal flat plate and enables attachment of the ceiling joist 20 to a beam 11. The runner 22, 22a, 22b includes: a fixation unit 34, 34a, 34b fixed to a first side surface 16 or a second side surface 17 of the beam 11; a fitting unit 36, 36a, 36b to which the ceiling joist 20 is to be fitted; and a connection unit 35, 35a, 35b connecting the fixation unit 34, 34a, 34b and the fitting unit 36, 36a, 36b and being elastically deformable in a vertical direction 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ceiling support structure for supporting a ceiling. [Background technology]

[0002] An example of a ceiling support structure in which a ceiling is supported by structural materials is known from Patent Document 1. In the ceiling structure of Patent Document 1, the end of the rafter is attached with the inner wall runner attached to the wall body, and the ceiling surface material is attached below the rafter.

[0003] In addition, in the first intermediate structural part of Patent Document 2, an intermediate ceiling hanging bracket equipped with an anti-vibration rubber member is fixed to an H-shaped steel, a soffit support is fixed to the intermediate ceiling hanging bracket, a soffit is fixed to the soffit support, and a ceiling base material is fixed to the soffit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3194065 [Patent Document 2] JP 2018-119326 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the ceiling structure described in Patent Document 1, the inner wall runner is attached directly to the wall, so the vibrations of the floor above are transmitted to the ceiling surface material of the floor below via the wall and the joist. Therefore, the vibrations of the upper floor are easily transmitted to the floor below via the ceiling. On the other hand, in the first intermediate structure part of Patent Document 2, the vibrations transmitted from the upper floor can be absorbed by the vibration-proof rubber member, but the structure requires the joist support, which increases the cost.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a ceiling support structure that can inexpensively suppress vibrations transmitted from structural materials to the ceiling. [Means for solving the problem]

[0007] (1) The ceiling support structure according to claim 1 is a ceiling support structure including a rafter to which a ceiling board is attached, and a runner molded from a flat metal plate and capable of attaching the rafter to a structural material. The runner has a fixing part fixed to a side surface of the structural material, a fitting part into which the rafter is fitted, and a connecting part connecting the fixing part and the fitting part and elastically deformable in the vertical direction.

[0008] Because the connecting part that connects the fixed part and the fitting part is elastically deformable in the vertical direction, the vertical vibration generated in the structural material is mitigated and transmitted to the fitting part. As a result, the vibration transmitted from the second floor floor to the ceiling board on the first floor is suppressed. In addition, since no joist support is required, vibration suppression can be achieved at low cost.

[0009] (2) Claim 2 is a ceiling support structure as described in claim 1, wherein the connecting portion has a first extension portion extending from the lower end of the fixed portion in a first direction intersecting the vertical direction, and a second extension portion extending downward from the first extension portion and connecting with the fitting portion.

[0010] (3) Claim 3 is a ceiling support structure as described in claim 1, wherein the connecting portion extends downward from the lower end of the fixing portion in a first direction intersecting the up-down direction, and the fitting portion has an upper plate extending from the extended end of the connecting portion in a direction opposite to the first direction, a back plate extending downward from the extended end of the upper plate, and a lower plate extending from the lower end of the back plate opposite the upper plate.

[0011] (4) Claim 4 relates to the ceiling support structure of claim 1, wherein the connecting portion has a third extension portion extending downward from the lower end of the fixed portion in a first direction intersecting the up-down direction, and a fourth extension portion extending from the extending end of the third extension portion along the opposite direction to the first direction, the fitting portion has a first plate extending in the first direction from the extending end of the fourth extension portion, a second plate extending downward from the tip of the first plate in the direction opposite to the first direction, and a third plate extending from the lower end of the second plate opposite to the first plate, and the fixed portion and the connecting portion are cut out from the second plate of the fitting portion.

[0012] The yield rate when manufacturing runners is good.

[0013] (5) The ceiling support structure of claim 5 comprises a rafter to which a ceiling board is attached, and a runner molded from a flat metal plate and capable of attaching the rafter to a structural material, wherein the runner has an upper plate extending along a cross direction that crosses a side of the structural material, a back plate extending downward from an end of the upper plate facing the structural material, and a lower plate extending from a lower end of the back plate opposite the upper plate, and the back plate protrudes in a mountain shape along the cross direction and has an elastic portion that is elastically deformable in the vertical direction.

[0014] The position of the joist is close to the fixed part because it is sandwiched between the upper board located at the top end of the fixed part and the lower board located below the connecting part. This means that the joist does not move sideways, and no lateral vibrations are transmitted to the ceiling board on the first floor. Effect of the Invention

[0015] The ceiling support structure of the present invention can inexpensively suppress vibrations transmitted from structural materials to the ceiling. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram showing a ceiling support structure 12 of a building 10. [Diagram 2] FIG. 2 is a view of the ceiling support structure 12 shown in FIG. 1 as seen from the left. [Diagram 3] FIG. 3 is a perspective view of the runner 22 according to the first embodiment. [Figure 4] FIG. 4 is a rear view of the runner 22 shown in FIG. [Diagram 5] FIG. 5 is a diagram illustrating a procedure for attaching the ceiling board 25 using the runner 22. As shown in FIG. [Figure 6] FIG. 6 is a diagram illustrating a procedure for attaching the ceiling board 25 using the runner 22. As shown in FIG. [Figure 7] FIG. 7 is a diagram illustrating a procedure for attaching the ceiling board 25 using the runner 22. As shown in FIG. [Figure 8] FIG. 8 is a perspective view showing a runner 22a according to a modified example of the first embodiment. [Figure 9] FIG. 9 is a perspective view showing a runner 22b according to the second embodiment. [Figure 10] FIG. 10 is a view of the runner 22b shown in FIG. 9 as viewed from the right. [Figure 11] FIG. 11 is a diagram showing a ceiling support structure 12 according to the third embodiment. [Figure 12] FIG. 12 is a perspective view showing a runner 22c according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described. Note that the embodiment described below is merely an example of the present invention, and it goes without saying that the embodiment of the present invention can be appropriately modified without departing from the gist of the present invention.

[0018] In the following, the up-down direction 1 is defined based on the state in which the building 10 is constructed. The direction in which the joists 20 extend perpendicular to the up-down direction 1 is defined as the left-right direction 2. The direction in which the beams 11 extend perpendicular to the up-down direction 1 and the left-right direction 2 is defined as the front-rear direction 3.

[0019] [First embodiment] The building 10 is a house or the like with a wooden frame structure, with multiple pillars erected on a base placed on a foundation (not shown). Some of the multiple pillars support beams (an example of a structural material) 11. A ceiling support structure 12 is arranged on the beams 11. FIGS. 1 and 2 show a case in which the ceiling support structure 12 of the first floor 15 is located below the floor 14 of the second floor 13. A plurality of beams 11 are arranged below the floor 14 of the second floor 13. As shown in FIGS. 1 and 2, the beams 11 extend along the front-to-rear direction 3, and have a first side surface (an example of a side surface) 16 facing leftward and a second side surface (an example of a side surface) 17 facing rightward.

[0020] The siding 20 extends in the left-right direction 2. The right end portion 27 of the siding 20 is fitted into a runner 22 attached to the first side surface 16 of the beam 11, and the other end of the siding 20 is fitted into a runner 22 fixed to another beam located to the left of the beam 11. The arrangement of the runner 22 and the siding 20 is the same on the right side of the beam 11, and the left end portion 28 of the siding 20 is fitted into a runner 22 attached to the second side surface 17 of the beam 11, and the other end is fitted into a runner 22 fixed to another beam located to the right of the beam 11.

[0021] The ceiling support structure 12, located to the left of the beam 11, includes a siding 20 and a runner 22. The siding 20 and the runner 22 are each formed by rolling a flat metal material having a predetermined thickness, such as steel or aluminum.

[0022] The joists 20 have a generally rectangular cross section when viewed from the left-right direction 2, and extend in a cylindrical shape along the left-right direction 2. A plurality of the joists 20 are arranged in the front-rear direction 3.

[0023] The runner 22 supports the joists 20. The runner 22 is fixed at a position near the lower side of the first side surface 16 by screws 39 and 55. The runner 22 fixed to the first side surface 16 supports the right end portions 27 of the multiple joists 20. As shown in Figs. 3 and 4, the runner 22 includes a fixing portion 34, a connecting portion 35, and a fitting portion 36.

[0024] The fixing portion 34 is a portion that is fixed to the first side surface 16 or the second side surface 17 of the beam 11. Three fixing portions 34 are positioned at equal intervals in the front-rear direction 3 along the first side surface 16 or the second side surface 17 of the beam 11. Each fixing portion 34 has a main surface 37 that abuts against the first side surface 16 or the second side surface 17, a through hole 38 that penetrates in the left-right direction 2, and a long hole 44 that penetrates in the left-right direction 2 and is long in the up-down direction 1. The dimension of each fixing portion 34 in the front-rear direction 3 may be sufficient as long as it can be fixed to the first side surface 16 or the second side surface 17 with a screw 39 or the like.

[0025] The connecting portion 35 connects the fitting portion 36 and each fixed portion 34. Each connecting portion 35 is located to the left and below each fixed portion 34 in a state where the fixed portion 34 is fixed to the first side surface 16. More specifically, each connecting portion 35 has a first extension portion 50 and a second extension portion 51.

[0026] The first extension portion 50 extends leftward (an example of a first direction) from the lower end 29 of the fixing portion 34. The first extension portion 50 is aligned along the left-right direction 2 and the front-rear direction 3. The dimension of the first extension portion 50 in the front-rear direction 3 is the same as that of the fixing portion 34. The second extension portion 51 extends downward from the left end of the first extension portion 50 while curving so as to bulge leftward. The second extension portion 51 is connected to the fitting portion 36. The dimension of the second extension portion 51 in the front-rear direction 3 is the same as that of the first extension portion 50.

[0027] The fitting portion 36 is a long member that is long in the front-to-rear direction 3 when fixed to the beam 11. A plurality of sills 20 are fitted into the fitting portion 36. The fitting portion 36 is located to the left of the fixing portion 34. The fitting portion 36 is located below each connecting portion 35. The fitting portion 36 has an upper plate 40, a back plate 41, and a lower plate 42.

[0028] The upper plate 40 extends to the right from the lower end 31 of the second extension portion 51. When viewed in the up-down direction 1, the upper plate 40 has a rectangular shape that is longer in the front-rear direction 3 than in the left-right direction 2. The upper plate 40 is aligned along the left-right direction 2 and the front-rear direction 3. The upper plate 40 faces three first extension portions 50. The dimension of the upper plate 40 in the front-rear direction 3 is larger than that of the second extension portions 51. The dimension D1 (see FIG. 4 ) of the upper plate 40 in the left-right direction 2 is smaller than the dimension D2 of the first extension portions 50 in the left-right direction 2.

[0029] The back panel 41 extends downward from the right end 32 of the upper panel 40. The back panel 41 is aligned along the up-down direction 1 and the front-to-back direction 3. The dimension of the back panel 41 in the front-to-back direction 3 is the same as the dimension of the upper panel 40 in the front-to-back direction 3. The right end of the joist 20 abuts against the surface of the back panel 41 facing left (see FIG. 1).

[0030] The lower plate 42 extends leftward from the lower end 33 of the back plate 41. The lower plate 42 is aligned along the left-right direction 2 and the front-to-back direction 3, and its upper surface faces the lower surface of the upper plate 40. The dimension of the lower plate 42 in the front-to-back direction 3 is the same as the dimension of the back plate 41 in the front-to-back direction 3. The dimension D3 of the lower plate 42 in the left-to-right direction 2 (see FIG. 4) is greater than the dimension D1 of the upper plate 40 in the left-to-right direction 2.

[0031] 1, the runner 22 is also attached to the right side of the beam 11, and is disposed so that the main surface 37 abuts against the second side surface 17. A plurality of ceiling boards 25 are fixed with screws 26 to the joists 20 supported by the runners 22 fixed to the left and right sides of the beam 11.

[0032] [Installation procedure for ceiling board 25 using runner 22] In the following, a procedure for attaching the ceiling board 25 to the beam 11 by the runner 22 will be described with reference to Figs. 5, 6, and 7. When attaching the ceiling board 25 to the beam 11, the worker first attaches the runner 22 to the beam 11. Specifically, as shown in Fig. 5, the worker temporarily fastens the screws 39 to the long holes 44 in a state in which each fixing portion 34 is positioned on the first side surface 16 of the beam 11. At this time, the screws 39 are not completely fastened to the beam 11, and the runner 22 is in a state in which it can slide in the vertical direction 1 relative to the beam 11. In this state, the worker aligns each through hole 38 with respect to the first side surface 16 in the vertical direction 1, and fixes the runner 22 to the first side surface 16 while inserting the screws 55 into each through hole 38. After fastening the screws 55, the worker also tightens the screws 39 to fix the runner 22 to the first side surface 16.

[0033] After the runner 22 is attached to the left side of the beam 11, the runner 22 is attached to the second side surface 17. Specifically, as shown in FIG. 6, the worker temporarily fastens the screws 39 to the long holes 44 while positioning the runner 22 on the second side surface 17. After the temporary fastening, the worker aligns the runner 22 to the same position in the vertical direction 1 as the runner 22 attached to the first side surface 16. With the position aligned, the worker inserts the screws 55 into the through holes 38 to fix the runner 22 to the second side surface 17. After fixing the screws 55, the worker also tightens the screws 39 to fix the runner 22 to the second side surface 17. The runner 22 fixed to the second side surface 17 is fixed to the same position in the vertical direction 1 as the runner 22 fixed to the first side surface 16.

[0034] Next, as shown in FIG. 7, the worker attaches a plurality of sidings 20 to the fitting portion 36 of the runner 22 fixed to the first side surface 16. The left end portion of the sidings 20 is supported by a runner fixed to another beam located to the left of the beam 11 (not shown), and the right end portion 27 is sandwiched between the upper plate 40 and the lower plate 42 of the runner 22 fixed to the first side surface 16. At this time, the right end of the sidings 20 abuts the back plate 41. The sidings 20 are arranged in a line in the front-rear direction 3 along the left-right direction 2. The worker can adjust the spacing between the sidings 20 by moving them in the front-rear direction 3 while they are sandwiched between the upper plate 40 and the lower plate 42. The worker also sandwiches the left end portion 28 of the sidings 20 located to the right of the beam 11 between the upper plate 40 and the lower plate 42 to adjust the spacing between the sidings 20 in the front-rear direction 3.

[0035] As shown in Figures 1 and 7, a worker fastens a plurality of ceiling boards 25 with screws 26 to the undersides 24 of the rafters 20 arranged in the front-to-rear direction 3.

[0036] [Effects of the first embodiment] In this embodiment, since the connecting portion 35 connecting the fixing portion 34 and the fitting portion 36 is elastically deformable in the vertical direction 1, the vibration in the vertical direction 1 generated in the beam 11 is mitigated by the connecting portion 35 and transmitted to the fitting portion 36. As a result, the vibration transmitted from the floor 14 of the second floor 13 to the ceiling board 25 of the first floor 15 is suppressed. In addition, since the ceiling support structure 12 can be composed of the joists 20 and the runners 22 and does not require joist supports, vibration suppression can be achieved at low cost.

[0037] [Modification of the first embodiment] The runner 22 according to the above embodiment has been described with an example in which the fitting portion 36 is larger in dimension than the fixed portion 34 and the connecting portion 35 in the front-rear direction 3, but is not limited to this configuration. Also, the first extension portion 50 extends leftward from the lower end of the fixed portion 34, and the second extension portion 51 extends downward from its left end while curving to bulge leftward, but is not limited to this configuration. The runner 22a may have, for example, the configuration described below.

[0038] As shown in Fig. 8, the runner 22a according to the modified example is formed by folding back a single rectangular flat plate. The fixed portion 34a has a through hole 38a and a long hole 44a. The through hole 38a penetrates the fixed portion 34a in the left-right direction 2. Three through holes 38a are positioned at equal intervals in the front-rear direction 3. The long hole 44a penetrates the fixed portion 34a in the left-right direction 2 and is long in the up-down direction 1. The long holes 44a are positioned below the three through holes 38a in the fixed portion 34a.

[0039] The connecting portion 35a extends leftward (an example of a first direction) and downward from a lower end 46 of the fixing portion 34a. The connecting portion 35a is aligned along the front-rear direction 3. The fitting portion 36a has an upper plate 40a, a back plate 41a, and a lower plate 42a.

[0040] The upper plate 40a extends rightward (an example of a direction opposite to the first direction) from a left end (an example of an extending end of a connecting portion) 47 of the connecting portion 35a. The fitting portion 36a has the same dimensions as the fixing portion 34a in the front-rear direction 3, and also has the same dimensions as the connecting portion 35a. The back plate 41a extends downward from a right end (an example of an extending end of the upper plate) 48 of the upper plate 40a. The lower plate 42a extends leftward from a lower end 49 of the back plate 41a. The lower plate 42a is aligned along the left-right direction 2 and the front-rear direction 3, and its upper surface faces the lower surface of the upper plate 40.

[0041] [Other variations] In the above-described first embodiment, an example has been described in which three fixing portions 34 are positioned at equal intervals in the front-rear direction 3, but the present invention is not limited to this configuration. The number of fixing portions 34 for one fitting portion 36 extending along the front-rear direction 3 may be two or less, or four or more.

[0042] In the above-described first embodiment, a case has been described in which the dimension D3 of the lower plate 42 in the left-right direction 2 is larger than the dimension D1 of the upper plate 40 in the left-right direction 2, but this is not limited to the configuration. The dimension D3 of the lower plate 42 in the left-right direction 2 may be smaller than or the same as the dimension D1 of the upper plate 40 in the left-right direction 2.

[0043] In the above-described first embodiment, an example has been described in which the screw 55 is completely fastened to the first side surface 16 or the second side surface 17, and then the provisionally fastened screw 39 is also fastened to fasten the runner 22 to the first side surface 16 or the second side surface 17, but this is not limiting. The provisionally fastened screw 39 may be removed from the first side surface 16 or the second side surface 17 after the runner 22 is fastened by the screw 55. In other words, the runner 22 may be fastened by only the screw 55.

[0044] In the above-described first embodiment, the fixing portion 34 has the through hole 38 for fixing the runner 22 to the beam 11 and the long hole 44 for determining the position of the runner 22 relative to the beam 11. However, the present invention is not limited to this configuration. The fixing portion 34 may have only the through hole 38.

[0045] [Second embodiment] In the above-described first embodiment, the case where the connecting portion 35 of the runner 22 is connected to the left end of the upper plate 40 has been described as an example, but the present invention is not limited to this configuration. For example, as shown in Fig. 9, the connecting portion 35b may be connected to the upper end of the second plate 61 of the fitting portion 36b. Furthermore, the runner 22b in this embodiment may be formed by cutting and raising the fixing portion 34b and the connecting portion 35b from the second plate 61.

[0046] The runner 22b has a fixing portion 34b, a connecting portion 35b, and a fitting portion 36b. Three fixing portions 34b are positioned at equal intervals in the front-rear direction 3 along the first side surface 16 or the second side surface 17 of the beam 11. Each fixing portion 34b has a main surface 37b (see FIG. 10) that abuts against the first side surface 16 or the second side surface 17, a through hole 38b that penetrates in the left-right direction 2, and a long hole 44b that penetrates in the left-right direction 2 and is long in the up-down direction 1. The dimension of each fixing portion 34b in the front-rear direction 3 may be sufficient to allow it to be fixed to the first side surface 16 or the second side surface 17 with a screw or the like.

[0047] The connecting portion 35b connects the fitting portion 36b and each fixing portion 34b. Each connecting portion 35b is bent into a V shape that opens to the right. More specifically, each connecting portion 35b has a third extension portion 58 and a fourth extension portion 59.

[0048] The third extension portion 58 extends leftward (an example of the first direction) from a lower end 65 of the fixed portion 34b. The third extension portion 58 has the same dimension in the front-to-rear direction 3 as the fixed portion 34b. The fourth extension portion 59 extends rightward (an example of the direction opposite to the first direction) from a left end 66 (an example of an extending end of the third extension portion) of the third extension portion 58. The dimension in the front-to-rear direction 3 of the fourth extension portion 59 is the same as that of the third extension portion 58.

[0049] The fitting portion 36b has a first plate 60, a second plate 61, and a third plate 62. The first plate 60 extends leftward from a lower end (an example of an extending end of the fourth extending portion) 67 of the fourth extending portion 59. The first plate 60 is aligned along the left-right direction 2 and the front-rear direction 3. The first plate 60 is longer in the front-rear direction 3 than each of the fourth extending portions 59.

[0050] The second plate 61 extends downward from a right end (an example of a tip in the direction opposite to the first direction) 68 of the first plate 60. The second plate 61 is aligned along the up-down direction 1 and the front-rear direction 3. The second plate 61 has the same dimensions as the first plate 60 in the front-rear direction 3. Three notched holes 45 are formed in the second plate 61. The notched holes 45 are rectangular openings that are longer in the up-down direction 1 than in the front-rear direction 3.

[0051] The cut and raised portion of the second plate 61 is folded back to form the fixing portion 34b, the third extension portion 58, and the fourth extension portion 59. The cut and raised portion is folded at two creases along the front-rear direction 3 to form the fixing portion 34b at the tip portion, the third extension portion 58 at the central portion, and the fourth extension portion 59 at the base end portion.

[0052] The third plate 62 extends leftward from the lower end 69 of the second plate 61. The upper surface of the third plate 62 faces the lower surface of the second plate 61. The dimension of the third plate 62 in the front-rear direction 3 is the same as the dimension of the first plate 60 in the front-rear direction 3.

[0053] Since the fixing portion 34b and the connecting portion 35b can be formed by the cut-up portion of the second plate 61, the size of the material used can be reduced. This allows the runner 22b to be manufactured with a good yield.

[0054] In the above-mentioned first and second embodiments, the connecting parts 35, 35a, 35b of the runners 22, 22a, 22b fixed to the first side surface 16 are located to the left of the fixed parts 34, 34a, 34b, but the present invention is not limited to this configuration. For example, the connecting parts 35, 35a, 35b may be located to the left of the first side surface 16. In addition, when the runners 22, 22a, 22b are attached to the second side surface 17, the connecting parts 35, 35a, 35b may be located to the right of the second side surface 17. In other words, the connecting parts 35, 35a, 35b may extend in a direction that does not interfere with the first side surface 16 or the second side surface 17 of the beam 11.

[0055] In the above-mentioned first and second embodiments, the fitting portions 36, 36a, 36b are described as long members that are long in the front-rear direction 3, but the fitting portions 36, 36a, 36b may be shorter than the beam 11. In other words, the fitting portions 36, 36a, 36b may be long in the front-rear direction 3 so that one of the runners 22, 22a, 22b can be arranged along the beam 11, or a plurality of fitting portions may be arranged along the beam 11.

[0056] [Third embodiment] In the above-mentioned first embodiment, the fitting portion 36 of the runner 22 is located below the connecting portion 35, and the furring strip 20 is supported below the connecting portion 35. However, the present invention is not limited to this configuration. For example, the runner 22c may be configured to sandwich the furring strip 20 between an upper plate 80 located above the through hole 38c and an upper plate 82 located below the through hole 38c, as shown in Figs. 11 and 12.

[0057] As shown in Fig. 11, the ceiling support structure 12 located to the left of the beam 11 includes a joist 20 and a runner 22c. The runner 22c is an elongated member that is long in the front-to-rear direction 3 when fixed to the beam 11. The runner 22c is fixed by a screw 39 with the back panel 81 abutting against the first side surface 16 at a position toward the lower side of the beam 11. The runner 22c fixed to the first side surface 16 supports the right end portions 27c of the multiple joists 20.

[0058] 12, the runner 22c has an upper plate 80, a back plate 81, and a lower plate 82. The upper plate 80 is aligned along the left-right direction 2 and the front-rear direction 3 (an example of a cross direction), and is long in the front-rear direction 3.

[0059] The back plate 81 extends downward from a right end (an example of an end facing a structural material) 83 of the upper plate 80. The back plate 81 has the same dimension in the front-rear direction 3 as the upper plate 80. The back plate 81 has a fixed portion 90, a through hole 38a, an elastic portion 91, and an extension portion 92.

[0060] The fixing portion 90 is aligned along the up-down direction 1 and the front-rear direction 3. The fixing portion 90 is located toward the upper side of the back panel 81. The fixing portion 90 has a through hole 38c penetrating therethrough in the left-right direction 2. Three through holes 38c are positioned at equal intervals in the front-rear direction 3.

[0061] The elastic portion 91 is located below the fixed portion 90. The elastic portion 91 protrudes to the left in a mountain shape. More specifically, the elastic portion 91 has a first portion 93 and a second portion 94.

[0062] The first portion 93 extends leftward and downward from the lower end 84 of the fixing portion 90. The first portion 93 is aligned along the front-rear direction 3. The dimension of the first portion 93 in the front-rear direction 3 is the same as that of the fixing portion 90. The dimension of the first portion 93 in the left-right direction 2 is smaller than that of the upper plate 80.

[0063] The second portion 94 extends rightward and downward from the left end 85 of the first portion 93. The second portion 94 has the same dimension in the front-rear direction 3 as the first portion 93. The dimension of the second portion 94 in the left-right direction 2 is smaller than the dimension of the first portion 93 in the left-right direction 2.

[0064] The extension portion 92 extends downward from the lower end 86 of the second portion 94. The extension portion 92 is aligned along the up-down direction 1 and the front-to-back direction 3. The extension portion 92 is located toward the lower side of the back panel 81. The extension portion 92 is parallel to the fixed portion 90 and is located to the left of the fixed portion 90. The dimension of the extension portion 92 along the front-to-back direction 3 is the same as that of the second portion 94.

[0065] The lower plate 82 extends leftward from a lower end 87 of the extension portion 92 (an example of the lower end of the back plate). The upper surface of the lower plate 82 faces the lower surface of the upper plate 80. The dimension of the lower plate 82 in the front-rear direction 3 is the same as that of the second portion 94. The dimension of the lower plate 82 in the left-right direction 2 is larger than that of the upper plate 80.

[0066] When installing the ceiling board 25 on the beams 11, a worker fastens the screws 39 into the through holes 38c while positioning the runner 22c on the first side surface 16. In this way, the runner 22c is fixed to the first side surface 16.

[0067] After the runner 22c is attached to the left side of the beam 11, a runner 22c is also attached to the second side surface 17 at the same position in the vertical direction 1 as the runner 22c fixed to the first side surface 16.

[0068] The worker clamps the right end portion 27c of the siding 20 between the upper plate 80 and the lower plate 82 of the runner 22c fixed to the first side surface 16, and similarly clamps the left end portion to the runner 22c fixed to another beam located to the left of the beam 11. At this time, the right end of the siding 20 abuts the left end 85 of the first portion 93 (see FIG. 11). The worker can adjust the spacing between the sidings 20 arranged in the front-rear direction 3 by moving the sidings 20 sandwiched between the upper plate 80 and the lower plate 82 in the front-rear direction 3. Similarly, the worker attaches the multiple sidings 20 between the upper plate 80 and the lower plate 82 of the runner 22c fixed to the second side surface 17. As shown in FIG. 11, the ceiling board 25 is fixed to the lower surface 24 of the siding 20 with the screws 26.

[0069] [Other variations] In the above third embodiment, the runner 22c is an elongated member that is long in the front-rear direction 3. However, the runner 22c may be shorter than the beam 11. In other words, the runner 22c may be long in the front-rear direction 3 so that one runner 22c can be arranged along the beam 11, or multiple runners 22c can be arranged along the beam 11.

[0070] In the above-described embodiments, the runners 22, 22a, 22b, and 22c are attached to the beams 11. However, the present invention is not limited to this configuration. The runners 22, 22a, 22b, and 22c may be attached to the inner walls of a building.

[0071] In the above-mentioned embodiments, the runners 22, 22a, 22b, 22c are fixed to the beam 11 by inserting the screws 55 into the through holes 38, 38a, 38b, 38c, but the present invention is not limited to this configuration. The runners 22, 22a, 22b, 22c do not have to have the through holes 38, 38a, 38b, 38c. In this case, the runners 22, 22a, 22b, 22c are fixed to the beam 11 by directly driving the screws 55 into them.

[0072] In the above-mentioned embodiments, the sill 20 extends in the left-right direction 2, and the right end portion 27 and the left end portion 28 are sandwiched between the runners 22, 22a, 22b, and 22c. However, the present invention is not limited to this configuration. The sill 20 may be arranged on the runners 22, 22a, 22b, and 22c in a position extending in the front-rear direction 3, for example, via other members. In this case, the sill 20 may be inserted in a state parallel to the runners 22, 22a, 22b, and 22c.

[0073] [Appendix 1] A ceiling support structure comprising a joist to which a ceiling board is attached, and a runner formed from a metal flat plate and capable of attaching the joist to a structural material, The above runners are A fixing portion fixed to a side surface of the structural material; A fitting portion into which the above-mentioned siding is fitted; A ceiling support structure having a connecting portion that connects the fixed portion and the fitting portion and is elastically deformable in the vertical direction.

[0074] [Appendix 2] The connecting portion is a first extension portion extending from a lower end of the fixing portion in a first direction intersecting the up-down direction; A ceiling support structure as described in Appendix 1, having a second extension portion that extends downwardly and curves from the first extension portion to connect to the fitting portion.

[0075] [Appendix 3] The connecting portion extends downward from a lower end of the fixing portion in a first direction intersecting with the up-down direction, The fitting portion is an upper plate extending from an extension end of the connecting portion along a direction opposite to the first direction; A back plate extending downward from the extending end of the upper plate; A ceiling support structure as described in Appendix 1, having a lower plate extending from the lower end of the back plate opposite the upper plate.

[0076] [Appendix 4] The connecting portion is a third extension portion extending downward from a lower end of the fixed portion in a first direction intersecting the up-down direction; a fourth extension portion extending from an extension end of the third extension portion along a direction opposite to the first direction, The fitting portion is a first plate extending in the first direction from an extension end of the fourth extension portion; a second plate extending downward from a tip of the first plate in a direction opposite to the first direction; a third plate extending from a lower end of the second plate opposite to the first plate, A ceiling support structure as described in Appendix 1, wherein the fixed portion and the connecting portion are cut and raised from the second plate of the fitting portion.

[0077] [Appendix 5] A ceiling support structure comprising a joist to which a ceiling board is attached, and a runner molded from a metal flat plate and capable of attaching the joist to a structural material, The above runners are An upper plate extending along a cross direction crossing a side surface of the structural material; A back plate extending downward from an end of the upper plate facing the structural member; A lower plate extending from a lower end of the back plate to face the upper plate, The back panel is A ceiling support structure having an elastic portion that protrudes in a mountain shape along the intersecting direction and is elastically deformable in the vertical direction. [Explanation of symbols]

[0078] 11... Beam (structural material) 12. Ceiling support structure 16...1st side (side) 17...Second side (side) 20. Rough edge 22, 22a, 22b, 22c...Runner 25 Ceiling board 29...Lower end of fixed portion 34 34,34a,34b,90... Fixed part 35,35a,35b...Connection part 36,36a,36b...Mating part 40, 40a, 80...Top plate 41,41a,81...back board 42,42a,82...lower plate 46: Lower end of fixed portion 34a 47: Left end of connecting portion 35a (extending end of connecting portion) 48: Right end of upper plate 40a (extending end of upper plate) 49...Lower end of back panel 41a 50...1st Enbe 51...2nd Enbe 58...3rd Enbe 59...4th Enbe 60...1st board 61...2nd board 62...3rd board 65: Lower end of fixed portion 34b 66: Left end of the third extension portion 58 (extension end of the third extension portion) 67: Lower end of fourth extension portion 59 (extension end of fourth extension portion) 68: Right end of the first plate 60 (the tip in the direction opposite to the first direction) 69: Lower end of second plate 61 (lower end of second plate) 83: Right end of upper plate 80 (end facing the structural material) 87...Lower end of extension 92 (lower end of back panel) 91 Elastic part

Claims

1. A ceiling support structure comprising a joist to which a ceiling board is attached, and a runner molded from a metal flat plate and capable of attaching the joist to a structural material, The above runners are A fixing portion fixed to a side surface of the structural material; A fitting portion into which the above-mentioned siding is fitted; A ceiling support structure having a connecting portion that connects the fixed portion and the fitting portion and is elastically deformable in the vertical direction.

2. The connecting portion is a first extension portion extending from a lower end of the fixing portion in a first direction intersecting with the up-down direction; 2. The ceiling support structure according to claim 1, further comprising: a second extension portion that curves downwardly and extends from the first extension portion to connect with the fitting portion.

3. The connecting portion extends downward from a lower end of the fixing portion in a first direction intersecting with the up-down direction, The fitting portion is an upper plate extending from an extension end of the connecting portion along a direction opposite to the first direction; A back plate extending downward from the extending end of the upper plate; 2. The ceiling support structure according to claim 1, further comprising: a lower plate extending from a lower end of said back plate opposite said upper plate.

4. The connecting portion is a third extension portion extending downward from a lower end of the fixed portion in a first direction intersecting the up-down direction; a fourth extension portion extending from an extension end of the third extension portion along a direction opposite to the first direction, The fitting portion is a first plate extending in the first direction from an extension end of the fourth extension portion; a second plate extending downward from a tip of the first plate in a direction opposite to the first direction; a third plate extending from a lower end of the second plate opposite to the first plate, 2. The ceiling support structure according to claim 1, wherein the fixing portion and the connecting portion are cut and raised from the second plate of the fitting portion.

5. A ceiling support structure comprising a joist to which a ceiling board is attached, and a runner molded from a metal flat plate and capable of attaching the joist to a structural material, The above runners are An upper plate extending along a cross direction crossing a side surface of the structural material; A back plate extending downward from an end of the upper plate facing the structural member; A lower plate extending from a lower end of the back plate to face the upper plate, The back panel is A ceiling support structure having an elastic portion that protrudes in a mountain shape along the intersecting direction and is elastically deformable in the vertical direction.

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