Ceiling structure and method for mounting ceiling face material

Abstract

To provide a ceiling structure capable of reducing construction labor at a job site.SOLUTION: A ceiling structure 100 includes a pair of ceiling base materials 10 extending in a first direction and facing each other in a second direction intersecting the first direction, a ceiling face material 20 supported by a pair of ceiling base materials 10A, joiners 30 attached to the lower faces of the pair of ceiling base materials 10 and holding end parts 21, 22 facing each other in the second direction of the ceiling face material 20, and support metal fittings 40, 50 attached to the end parts 21, 22 of the ceiling face material 20 and locked to the ceiling base materials 10, and the ceiling face material 20 is supported by the joiners 30 and the support metal fittings 40, 50.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a ceiling structure and a method for attaching a ceiling surface material. [Background technology]

[0002] It is stipulated by law that ceilings installed in rooms, corridors, and other places where people enter on a daily basis in buildings must be protected against falling ceilings according to their layout conditions. 2 In the following cases, no measures to prevent falling are necessary, and such ceilings are generally recognized as ceilings that are safe from falling (hereinafter referred to as "lightweight ceilings").

[0003] Various construction methods and materials have been proposed for lightweight ceilings. In order to form a lightweight ceiling that does not require measures to prevent falling off, it is necessary to reduce the weight of the ceiling substrate, the ceiling finish material, or both. For example, aluminum materials are often used to reduce the weight of the ceiling substrate, but there is a risk that the cost will increase compared to steel substrates.

[0004] The following Patent Document 1 describes a fixing structure for ceiling boards. This fixing structure includes multiple horizontal members that are rough girders installed in the horizontal direction, erecting members installed between the horizontal members, and boards that are fixed to temporary members with screws.

[0005] Also, a structure for fixing ceiling finishing materials (lightweight non-combustible boards) is known in which hat-shaped joiners are used to fix the ceiling finishing materials to the rafters. In this structure, the rafters are supported using hanging bolts, and the rafters are supported to the rafters via clips. In this structure, the bottom surface of the rafters and the hat-shaped joiner are placed opposite each other from above and below, and the edge of the ceiling finishing material is sandwiched and fixed from above and below between the bottom surface of the rafters and the hat-shaped joiner. The hat-shaped joiner is fixed to the rafters using screws. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6341254 Summary of the Invention [Problem to be solved by the invention]

[0007] In the technology described in Patent Document 1, the plate material is fixed to the temporary material using screws, so it is necessary to support the plate material when attaching the screws. In addition, in the above-mentioned ceiling finishing material fixing structure, when the ceiling finishing material is sandwiched between the rafters and the hat-shaped joiner, it is necessary to temporarily fix the ceiling finishing material to the rafters using, for example, double-sided tape. This creates a problem of increased construction time during construction on site.

[0008] An object of the present invention is to provide a ceiling structure and a method for attaching a ceiling surface material that can reduce on-site construction work. [Means for solving the problem]

[0009] In order to achieve the above object, one aspect of the ceiling structure according to the present invention is to A pair of ceiling underlayment materials extending in a first direction and facing each other in a second direction intersecting the first direction; A ceiling surface material supported by the pair of ceiling base materials; A joiner attached to the lower surfaces of the pair of ceiling base materials and holding the ends of the ceiling surface material facing in the second direction; A support metal fitting is attached to the end portion of the ceiling surface material and engaged with the ceiling base material, The ceiling surface material is characterized in that it is supported by the joiner and the support metal fittings.

[0010] According to this embodiment, the ceiling surface material can be supported via the support metal by engaging the support metal attached to the end of the ceiling surface material with the ceiling base material. This eliminates the need to temporarily fasten the ceiling surface material to the ceiling base material using double-sided tape as in the past. As a result, the on-site construction work can be reduced.

[0011] In another aspect of the present invention, The joiner may be made of resin.

[0012] According to this aspect, since the joiner is made of resin, it is possible to reduce the weight compared to metal joiners. Therefore, a lightweight ceiling with fall safety can be realized, and measures against falling off can be eliminated. Furthermore, according to this aspect, even if the resin joiner is burned in the event of a fire, for example, the ceiling surface material can be supported by the support metal fittings. This makes it possible to prevent the ceiling surface material from falling in the event of a fire.

[0013] In another aspect of the present invention, The joiner is A first member attached to the underside of the ceiling base material; The ceiling panel is characterized by having a second member that is attached to the first member from below and supports the underside of the ceiling panel.

[0014] According to this embodiment, since the joiner is divided into the first member and the second member, after the first member is attached to the ceiling base material, the ceiling surface material is supported via the support metal fittings, and then the second member can be attached to the first member from below. This allows the ceiling surface material to be supported by being sandwiched between the first member and the second member. In addition, since the second member does not get in the way when placing the support metal fittings on the ceiling base material, the work efficiency when placing the ceiling surface material can be improved.

[0015] In another aspect of the present invention, The support metal fitting is A locking piece placed on the upper surface of the ceiling base material; A hanging piece that hangs down from the locking piece along a side surface of the ceiling base material; A first piece bent from the hanging piece and arranged along an upper surface of the ceiling surface material; a second piece that hangs down from the first piece along an end surface of the ceiling surface material that faces the second direction; and a third piece bent from the second piece and supporting the underside of the ceiling panel.

[0016] According to this aspect, the support metal fitting can be locked to the ceiling base material by placing the locking piece on the top surface of the ceiling base material. Also, according to this aspect, the first piece and the third piece can be arranged to face each other vertically, and the ceiling surface material can be supported by being sandwiched between the first piece and the third piece. The first piece and the third piece that sandwich the ceiling surface material between the top and bottom are connected to the locking piece via the hanging piece, so that the ceiling surface material is supported by the ceiling base material.

[0017] In another aspect of the present invention, The support metal fitting is A magnet that is magnetically attached to a side surface of the ceiling base material; A hanging piece to which the magnet is fixed and which hangs down along a side surface of the ceiling base material; A first piece bent from the hanging piece and arranged along an upper surface of the ceiling surface material; a second piece that hangs down from the first piece along an end surface of the ceiling surface material that faces the second direction; and a third piece bent from the second piece and supporting the underside of the ceiling panel.

[0018] According to this aspect, the magnet fixed to the hanging piece is magnetically attached to the side of the ceiling base material, so that the support metal fitting can be easily attached to the ceiling base material, thereby reducing the work required for on-site construction.

[0019] The method for attaching a ceiling surface material according to the present invention comprises the steps of: A ceiling surface material installation method for installing a ceiling surface material to a pair of ceiling underlayment materials extending in a first direction and facing each other in a second direction intersecting the first direction, comprising: Attaching a joiner to the pair of ceiling base materials; Attaching support metal fittings to both ends of the ceiling surface material facing in the second direction; A step of attaching the support metal attached to one end of the support metal attached to both ends to one of the ceiling base materials facing in the second direction; A step of attaching the support metal attached to the other end of the support metal attached to both ends to the other ceiling base material facing in the second direction; and a step of fixing the ceiling surface material to the ceiling base material using the joiner.

[0020] According to this embodiment, the ceiling surface material can be supported via the support metal by attaching the support metal attached to the end of the ceiling surface material to the ceiling base material. This eliminates the need to temporarily fasten the ceiling surface material to the ceiling base material using double-sided tape as in the past. As a result, the on-site construction work can be reduced.

[0021] In another aspect of the present invention, The joiner is made of resin, A first member attached to the underside of the ceiling base material; A second member is attached to the first member from below and supports the lower surface of the ceiling surface material, The step of attaching the joiner includes a step of attaching the first member of the joiner to the underside of the ceiling base material, The process of fixing the ceiling surface material to the ceiling underlayment is characterized by including a process of attaching the second member to the first member from below and supporting the end of the ceiling surface material by sandwiching it between the second member and the first member.

[0022] According to this aspect, since the joiner is made of resin, it is possible to reduce the weight compared to metal joiners. Therefore, a lightweight ceiling with fall safety can be realized, and measures against falling off can be eliminated. Furthermore, according to this aspect, even if the resin joiner is burned in the event of a fire, for example, the ceiling surface material can be supported by the support metal fittings. This makes it possible to prevent the ceiling surface material from falling in the event of a fire.

[0023] According to this embodiment, since the joiner is divided into the first member and the second member, after the first member is attached to the ceiling base material, the ceiling surface material is supported via the support metal fittings, and then the second member can be attached to the first member from below. This allows the ceiling surface material to be supported by being sandwiched between the first member and the second member.

[0024] In another aspect of the present invention, The support metal fitting is A locking piece placed on the upper surface of the ceiling base material; A hanging piece that hangs down from the locking piece along a side surface of the ceiling base material; A first piece bent from the hanging piece and arranged along an upper surface of the ceiling surface material; a second piece that hangs down from the first piece along an end surface of the ceiling surface material that faces the second direction; A third piece bent from the second piece and supporting the lower surface of the ceiling surface material, The step of attaching the support metal to the end of the ceiling surface material includes a step of fitting a portion having the first piece, the second piece, and the third piece to the one end of the ceiling surface material, The process of attaching the support metal attached to one end to one of the ceiling base materials opposing the second direction is characterized by including a process of engaging the locking piece of the support metal to the ceiling base material by placing the locking piece on the upper surface of the one of the ceiling base materials.

[0025] According to this aspect, the portion having the first piece, the second piece, and the third piece can be fitted to one end of the ceiling surface material, and the support metal can be easily attached to one end of the ceiling surface material. During on-site construction, the support metal can be reliably attached to the ceiling surface material without construction work. Also, according to this aspect, the support metal attached to one end of the ceiling surface material can be placed on the upper surface of one of the ceiling base materials, thereby engaging the support metal with the ceiling base material. This allows one end of the ceiling surface material to be engaged with the ceiling base material before the other end. Effect of the Invention

[0026] As can be seen from the above explanation, it is possible to provide a ceiling structure and a ceiling surface material mounting method that can reduce the amount of work required for on-site construction. [Brief description of the drawings]

[0027] [Figure 1] 1 is a perspective view showing an example of a ceiling structure according to an embodiment; [Diagram 2] 1 is a perspective view showing an example of a ceiling surface material to which a support metal fitting is attached. [Diagram 3] FIG. 2 is a perspective view showing an example of a support metal fitting. [Figure 4] FIG. 2 is a perspective view showing an example of a support metal fitting. [Diagram 5] 1 is a cross-sectional view showing an example of a ceiling underlayment material, a first component of a joiner, and a screw. [Figure 6] A cross-sectional view showing an example of a ceiling underlayment material, a joiner, a supporting metal fitting, and an end portion of a ceiling surface material. [Figure 7] A cross-sectional view showing an example of a ceiling underlayment material, a joiner, a supporting metal fitting, and an end portion of a ceiling surface material. [Figure 8] A cross-sectional view showing a state in which one support metal fitting is inserted between a pair of ceiling base materials. [Figure 9] This is a cross-sectional view showing a state in which one support metal is engaged with one ceiling base material and the other support metal is being magnetically attached to the other ceiling base material. [Figure 10] A cross-sectional view showing a state in which both support metal fittings are attached to a pair of ceiling base materials to support the ceiling surface material. [Figure 11] A cross-sectional view showing a ceiling surface material being supported by a pair of ceiling underlayment materials using support metal fittings and joiners. [Figure 12] 1 is a process diagram showing the steps of a ceiling surface material mounting method according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, a ceiling structure and a method for attaching a ceiling surface material according to an embodiment will be described with reference to the accompanying drawings. In this specification and the drawings, substantially identical components are designated by the same reference numerals to avoid redundant description.

[0029] [Ceiling structure 100 according to the embodiment] An example of a ceiling structure 100 according to the embodiment will be described with reference to Figs. 1 to 11. Fig. 1 is a perspective view showing an example of a ceiling structure 100 according to the embodiment. Fig. 2 is a perspective view showing an example of a ceiling surface material 20 to which support metal fittings 40, 50 are attached. Fig. 3 is a perspective view showing an example of a support metal fitting 40. Fig. 4 is a perspective view showing an example of a support metal fitting 50. Fig. 5 is a cross-sectional view showing an example of a ceiling base material 10 (10A, 10B), a first member 31 of a joiner 30, and a screw 5. Fig. 6 is a cross-sectional view showing an example of a ceiling base material 10A, a joiner 30, a support metal fitting 40, and an end portion 21 of a ceiling surface material 20. Fig. 7 is a cross-sectional view showing an example of a ceiling base material 10B, a joiner 30, a support metal fitting 50, and an end portion 22 of a ceiling surface material 20.

[0030] FIG. 8 is a cross-sectional view showing a state where one support metal fitting 40 is inserted between a pair of ceiling base materials 10A and 10B. FIG. 9 is a cross-sectional view showing a state where one support metal fitting 40 is engaged with one ceiling base material 10A, and the other support metal fitting 50 is magnetically attached to the other ceiling base material 10B. FIG. 10 is a cross-sectional view showing a state where both support metal fittings 40 and 50 are attached to a pair of ceiling base materials 10A and 10B, and the ceiling surface material 20 is supported. FIG. 11 is a cross-sectional view showing a state where the ceiling surface material 20 is supported by the pair of ceiling base materials 10A and 10B using the support metal fittings 40 and 50 and the joiner 30. In each figure, arrows indicating mutually orthogonal X-axis, Y-axis, and Z-axis directions may be appropriately illustrated. The X-axis and Y-axis directions are horizontal. The Z-axis direction is vertical.

[0031] [Ceiling structure 100] The ceiling structure 100 shown in Fig. 1 is a ceiling structure for a building. The ceiling structure 100 includes a plurality of hanging bolts 1 extending in the vertical direction, hangers 2 attached to the lower ends of the hanging bolts 1, joist supports 3 supported by the hangers 2, and clips 4 attached to the joist supports 3.

[0032] The hanging bolt 1 extends downward from, for example, a reinforced concrete slab. A hanger 2 for supporting a joist support 3 is fixed to the lower end of the hanging bolt 1. The multiple joist supports 3 are spaced apart in the Y-axis direction and extend in the X-axis direction. One joist support 3 is supported by multiple hanging bolts 1 and hangers 2. Multiple clips 4 are attached to the joist support 3. The clips 4 engage the ceiling base material 10 from above.

[0033] The ceiling structure 100 includes a ceiling underlayment 10, a ceiling surface material 20 shown in FIG. 2, support metal fittings 40, 50, and a joiner 30 shown in FIGS.

[0034] [Ceiling underlayment material 10] As shown in FIG. 1, multiple ceiling underlayment materials 10 are spaced apart in the X-axis direction and extend in the Y-axis direction. The Y-axis direction is an example of a first direction, and the X-axis direction is an example of a second direction. The ceiling underlayment materials 10 are, for example, joists. The multiple ceiling underlayment materials 10 are arranged so as to intersect with the multiple joist supports 3. The ceiling underlayment materials 10 and the joist supports 3 are arranged so as to form a lattice pattern in a plan view.

[0035] As shown in Figs. 5 to 11, of a pair of ceiling underlayment materials 10 facing each other in the X-axis direction, one is ceiling underlayment material 10A and the other is ceiling underlayment material 10B. , 10B are not distinguished from each other, they will be referred to as ceiling underlayment material 10.

[0036] As shown in Fig. 5, the ceiling underlayment 10 has a bottom plate 11, a pair of side plates 12, and a pair of lips 13. The thickness direction of the bottom plate 11 is along the Z-axis direction. The pair of side plates 12 face each other in the X-axis direction. The thickness direction of the side plates 12 is along the X-axis direction. The side plates 12 are bent from the ends of the bottom plate 11 in the X-axis direction and extend upward.

[0037] The pair of lips 13 are bent from the upper ends of the pair of side panels 12 and extend inward in the X-axis direction. The inward side refers to the inside of the ceiling underlayment material 10. The inner ends of the pair of lips 13 in the X-axis direction may be bent downward.

[0038] [Ceiling surface material 20] As shown in FIG. 2, the ceiling surface material 20 is in the form of a plate. The plate thickness direction of the ceiling surface material 20 is along the Z-axis direction. The ceiling surface material 20 is in a rectangular shape in a plan view. The ceiling surface material 20 has a pair of end portions 21, 22 that face each other in the X-axis direction. The end portions 21, 22 are continuous in the Y-axis direction. The ceiling surface material 20 is supported by the ceiling underlayment material 10 shown in FIG. 1.

[0039] The ceiling surface material 20 may be square or rectangular. The ceiling surface material 20 is, for example, made of a non-combustible material. The plate thickness of the ceiling surface material 20 may be, for example, 4 mm, 4.5 mm, 9 mm, or other value. The weight per unit area of ​​the ceiling surface material 20 is, for example, 500 g / m 2 is good, 700g / m 2 is good, 860g / m 2 Other values ​​are also possible.

[0040] The dimensions of one ceiling surface material 20 may be, for example, 1P×2P. 1P is the width of one module, and may be 910 mm. The length of the ceiling surface material 20 in the Y-axis direction may be, for example, 3P, 4P, etc.

[0041] [Support hardware 40] As shown in FIG. 2, the support metal fitting 40 supports one end 21 of the ceiling surface material 20. The support metal fitting 40 may support the other end 22 of the ceiling surface material 20. The multiple support metal fittings 40 are arranged at a predetermined interval in the Y-axis direction. As shown in FIG. 3 and FIG. 6, the support metal fitting 40 includes a locking piece 41, a hanging piece 42, a first piece 43, a second piece 44, and a third piece 45. The support metal fitting 40 can be formed, for example, by pressing a metal plate. The manufacturing method of the support metal fitting 40 is not limited. The support metal fitting 40 is flexible. The first piece 43, the second piece 44, and the third piece 45 support the end 21 of the ceiling surface material 20 by sandwiching them.

[0042] [Lock piece 41] The plate thickness direction of the locking piece 41 is along the Z-axis direction. The locking piece 41 is placed on the lip 13 of the ceiling base material 10A. The lower surface of the locking piece 41 abuts the upper surface of the lip 13. The upper surface of the lip 13 is an example of the upper surface of the ceiling base material 10. The width of the locking piece 41 is larger than the width of the lip 13. The width is the length in the direction intersecting the longitudinal direction. The width of the locking piece 41 and the width of the lip 13 are the lengths in the X-axis direction. As shown in FIG. 6, the tip 41a of the locking piece 41 is positioned inside the inner end 13a of the lip 13.

[0043] [Drooping piece 42] The plate thickness direction of the hanging piece 42 is along the X-axis direction. The hanging piece 42 is bent from the locking piece 41 and hangs down. The length of the hanging piece 42 in the Z-axis direction is longer than the length of the side plate 12 in the Z-axis direction. The hanging piece 42 hangs down along the side plate 12 of the ceiling underlayment 10A. The hanging piece 42 and the side plate 12 face each other in the X-axis direction. A gap may be formed between the outer surface of the side plate 12 and the hanging piece 42 in the X-axis direction. The outer surface of the side plate 12 is an example of a side surface of the ceiling underlayment 10.

[0044] [1st piece 43] The first piece 43 is bent from the lower end of the hanging piece 42 and extends in the X-axis direction. The plate thickness direction of the first piece 43 is along the Z-axis direction. The first piece 43 protrudes from the hanging piece 42 in the same direction as the locking piece 41. The locking piece 41 and the first piece 43 face each other in the Z-axis direction. In the X-axis direction, the ceiling underlayment material 10A is disposed between the locking piece 41 and the first piece 43. The width of the first piece 43 may be the same as the width of the locking piece 41. The width of the first piece 43 is the length of the first piece 43 in the X-axis direction.

[0045] [Second piece 44] The second piece 44 is bent and extends downward from the inner end of the first piece 43. The plate thickness direction of the second piece 44 is along the X-axis direction. In the Z-axis direction, the length of the second piece 44 is longer than the thickness of the ceiling surface material 20.

[0046] [3rd piece 45] The third piece 45 is bent from the lower end of the second piece 44 and extends in the X-axis direction. The thickness direction of the third piece 45 is along the Z-axis direction. The first piece 43 and the third piece 45 face each other in the Z-axis direction. The tip 45a of the third piece 45 is disposed at approximately the same position as the hanging piece 42 in the X-axis direction.

[0047] In the Z-axis direction, the length between the first piece 43 and the third piece 45 is approximately the same as the plate thickness of the ceiling surface material 20. In the Z-axis direction, the end 21 of the ceiling surface material 20 is disposed between the first piece 43 and the third piece 45. The end 21 is sandwiched in the Z-axis direction by the first piece 43 and the third piece 45. The lower surface of the first piece 43 abuts against the upper surface of the end 21. The upper surface of the third piece 45 abuts against the lower surface of the end 21. In the X-axis direction, a gap may be formed between the second piece 44 and the end surface of the end 21. The end surface of the end 21 may be a YZ surface. The ends 21 and 22 include end surfaces that face each other in the X-axis direction.

[0048] [Support hardware 50] As shown in FIG. 2, the support metal fitting 50 supports the other end 22 of the ceiling surface material 20. The support metal fitting 50 may support one end 21 of the ceiling surface material 20. The support metal fitting 50 is disposed opposite the support metal fitting 40 in the X-axis direction. The multiple support metal fittings 50 are disposed at a predetermined interval in the Y-axis direction. As shown in FIG. 4 and FIG. 7, the support metal fitting 50 includes a magnet 51, a hanging piece 52, a first piece 53, a second piece 54, and a third piece 55. The hanging piece 52, the first piece 53, the second piece 54, and the third piece 55 can be formed, for example, by pressing a metal plate. The manufacturing method of the support metal fitting 50 is not limited. The hanging piece 52, the first piece 53, the second piece 54, and the third piece 55 are flexible. The first piece 53, the second piece 54, and the third piece 55 sandwich and support the end 22 of the ceiling surface material 20.

[0049] [Magnet 51] The magnet 51 is, for example, in the shape of a plate. The plate thickness direction of the magnet 51 is along the X-axis direction. The magnet 51 is fixed to the hanging piece 52. The magnet 51 may be adhered to the hanging piece 52. As shown in Fig. 7, the magnet 51 is magnetically attached to the side plate 12. The side plate 12 includes a side surface of the ceiling base material 10B.

[0050] [Drooping piece 52] The plate thickness direction of the hanging piece 52 is along the X-axis direction. The hanging piece 52 is disposed so as to face the side plate 12 in the X-axis direction. The magnet 51 is fixed to the surface of the hanging piece 52 facing the side plate 12. The hanging piece 52 hangs down along the side plate 12 in the Z-axis direction. The length of the hanging piece 52 in the Z-axis direction may be shorter than the length of the side plate 12 in the Z-axis direction. The upper end of the hanging piece 52 is disposed at a position lower than the lip 13, for example.

[0051] [1st piece 53] The first piece 53 is bent from the lower end of the hanging piece 52 and extends in the X-axis direction. The plate thickness direction of the first piece 53 is along the Z-axis direction. The first piece 53 protrudes in the X-axis direction so as to be positioned below the bottom plate 11 of the ceiling base material 10B.

[0052] [Second piece 54] The second piece 54 is bent and extends downward from the inner end of the first piece 53. The plate thickness direction of the second piece 54 is along the X-axis direction. In the Z-axis direction, the length of the second piece 54 is longer than the thickness of the ceiling surface material 20.

[0053] [3rd piece 55] The third piece 55 is bent from the lower end of the second piece 54 and extends in the X-axis direction. The thickness direction of the third piece 55 is along the Z-axis direction. The first piece 53 and the third piece 55 face each other in the Z-axis direction. The tip 55a of the third piece 55 is disposed at approximately the same position as the hanging piece 52 in the X-axis direction.

[0054] The first piece 53, the second piece 54, and the third piece 55 of the support metal 50 may have the same configuration as the first piece 43, the second piece 44, and the third piece 45 of the support metal 40. In the Z-axis direction, the length between the first piece 53 and the third piece 55 is approximately the same as the plate thickness of the ceiling surface material 20. In the Z-axis direction, the end 22 of the ceiling surface material 20 is disposed between the first piece 53 and the third piece 55. The end 22 is sandwiched in the Z-axis direction by the first piece 53 and the third piece 55. The lower surface of the first piece 53 abuts against the upper surface of the end 22. The upper surface of the third piece 55 abuts against the lower surface of the end 22. In the X-axis direction, a gap may be formed between the second piece 54 and the end surface of the end 22. The end surface of the end 22 may be a YZ surface.

[0055] [Joiner30] As shown in Figures 6, 7, and 11, the joiner 30 is attached to the underside of a pair of ceiling base materials 10A, 10B. As shown in Figure 11, the joiner 30 is arranged facing each other in the X-axis direction. The joiner 30 holds the ends 21, 22 of the ceiling surface material 20. The joiner 30 has a predetermined length in the Y-axis direction. The length of the joiner 30 in the Y-axis direction may be the same as the length of the ceiling base material 10 in the Y-axis direction. The joiner 30 is arranged along the ends 21, 22 in the Y-axis direction. The joiner 30 is made of, for example, resin. The joiner 30 may be made of metal. The joiner 30 has a strength capable of holding the ends 21, 22 of the joiner 30.

[0056] [First member 31] As shown in Figures 6 and 7, the joiner 30 has a first member 31 and a second member 32. The first member 31 is attached to the underside of the bottom plate 11 of the ceiling base material 10. As shown in Figure 5, the first member 31 includes a top plate 33 and a pair of locking plates 34. Figure 5 shows the first member 31 and screws 5 in a state prior to attachment to the ceiling base material 10.

[0057] The thickness direction of the top plate 33 is along the Z-axis direction. The width of the top plate 33 along the X-axis direction is approximately the same as the width of the bottom plate 11 along the X-axis direction. The top plate 33 is disposed opposite the bottom plate 11 in the Z-axis direction. As shown in Figures 6 and 7, the top plate 33 and the bottom plate 11 abut against each other in the Z-axis direction.

[0058] The pair of locking plates 34 are disposed facing each other in the X-axis direction. The plate thickness direction of the locking plates 34 is along the X-axis direction. The head 5a of the screw 5 and the protrusion 36 of the second member 32 are disposed between the pair of locking plates 34. Locking claws are formed on the inner surfaces of the pair of locking plates 34. The inner surfaces of the pair of locking plates 34 face each other. The locking claws of the locking plates 34 engage with the locking claws of the protrusion 36 of the second member 32. The pair of locking plates 34 are flexible. When the protrusion 36 of the second member 32 is pressed between the pair of locking plates 34, the pair of locking plates 34 bend appropriately.

[0059] [Second member 32] The second member 32 has a bottom plate 35 and a protrusion 36. The second member 32 is attached to the first member 31 from below. The plate thickness direction of the bottom plate 35 is along the Z-axis direction. The width of the bottom plate 35 along the X-axis direction is larger than the width of the top plate 33 along the X-axis direction. The width of the bottom plate 35 may be the same as the width of the top plate 33, or may be smaller than the width of the top plate 33. The top plate 33 and the bottom plate 35 are disposed to face each other in the Z-axis direction.

[0060] The protrusion 36 protrudes upward from the bottom plate 35. The protrusion 36 is inserted between the pair of locking plates 34. A locking claw that engages with the locking claw of the locking plate 34 is formed on the side of the protrusion 36.

[0061] As shown in Fig. 6, the end portion 21, the first piece 43, the second piece 44, and the third piece 45 are arranged in the gap between the top plate 33 and the bottom plate 35 of one of the joiners 30. The lower surface of the top plate 33 abuts against the upper surface of the first piece 43. The upper surface of the bottom plate 35 abuts against the lower surface of the third piece 45. The end portion 21 and a part of the support metal 40 are sandwiched and supported by the top plate 33 and the bottom plate 35 of the joiner 30. The bottom plate 35 can support the end portion 21 and a part of the support metal 40 from below.

[0062] As shown in Fig. 7, the end portion 22, the first piece 53, the second piece 54, and the third piece 55 are arranged in the gap between the top plate 33 and the bottom plate 35 of the other joiner 30. The lower surface of the top plate 33 abuts against the upper surface of the first piece 53. The upper surface of the bottom plate 35 abuts against the lower surface of the third piece 55. The end portion 22 and a part of the support metal 50 are sandwiched and supported by the top plate 33 and the bottom plate 35 of the joiner 30. The bottom plate 35 can support the end portion 22 and a part of the support metal 50 from below.

[0063] [How to install ceiling surface material] Next, a method for attaching a ceiling surface material will be described. Fig. 12 is a process diagram showing the procedure of the method for attaching a ceiling surface material according to the embodiment. In the method for attaching a ceiling surface material, for example, a ceiling surface material 20 shown in Fig. 2 can be attached to a ceiling base material 10 shown in Fig. 1.

[0064] As shown in FIG. 12, the ceiling surface material installation method includes the steps of attaching the first member 31 of the joiner 30 to the ceiling base material 10 (step S11), attaching support metal fittings 40, 50 to the ends 21, 22 of the ceiling surface material 20 (step S12), engaging the support metal fitting 40 attached to one end 21 with the upper surface of the ceiling base material 10A (step S13), magnetically attaching the magnet 51 of the support metal fitting 50 attached to the other end 22 to the side of the ceiling base material 10B (step S14), and attaching the second member 32 of the joiner 30 to the first member 31 (step S15).

[0065] In the process (step S11) of attaching the first member 31 of the joiner 30 to the ceiling base material 10, the first member 31 is fastened to the underside of the bottom plate 11 with a screw 5, as shown in Fig. 5. The top plate 33 is pressed against the underside of the bottom plate 11, and the first member 31 is fastened to the ceiling base material 10 with the screw 5. The screw 5 penetrates the top plate 33 and the bottom plate 11 in the Z-axis direction. The head 5a of the screw 5 abuts against the underside of the top plate 33, and the threaded portion of the screw 5 is disposed inside the ceiling base material 10. As shown in Fig. 8, the first member 31 is attached to each of a pair of ceiling base materials 10A, 10B.

[0066] Next, in the process of attaching the support metal fittings 40, 50 to the ends 21, 22 of the ceiling surface material 20 (step S12), as shown in Figures 2 and 8, the support metal fitting 40 is attached to one end 21 of the ceiling surface material 20, and the support metal fitting 50 is attached to the other end 22. The end 21 is sandwiched vertically between the first piece 43 and the third piece 45, and the end 22 is sandwiched vertically between the first piece 53 and the third piece 55. As shown in Figure 2, the hanging piece 42 of the support metal fitting 40 extends upward beyond the ceiling surface material 20. The hanging piece 52 of the support metal fitting 50 extends upward beyond the ceiling surface material 20.

[0067] Next, in the process (step S13) of engaging the support metal 40 attached to one end 21 with the upper surface of the ceiling base material 10A, as shown in Figures 8 and 9, the support metal 40 is inserted between the pair of ceiling base materials 10A, 10B and the engaging piece 41 is placed on the upper surface of the lip 13 of the ceiling base material 10A. This allows the engaging piece 41 of the support metal 40 to be formed on the upper surface of the lip 13 of the ceiling base material 10A.

[0068] Next, in the process (step S14) of magnetically attaching the magnet 51 of the support metal 50 attached to the other end 22 to the side of the ceiling base material 10, as shown in Figures 9 and 10, the support metal 50 is inserted between the pair of ceiling base materials 10A, 10B, and the magnet 51 is magnetically attached to the side of the side panel 12 of the ceiling base material 10B. This fixes the support metal 50 to the ceiling base material 10B. In this state, the end 21 of the ceiling surface material 20 is supported by the ceiling base material 10A via the support metal 40, and the end 22 of the ceiling surface material 20 is supported by the ceiling base material 10B via the support metal 50.

[0069] Next, in the process (step S15) of attaching the second member 32 of the joiner 30 to the first member 31, as shown in Figs. 6, 7, and 11, the second member 32 is pressed against the first member 31 from below to attach the second member 32 to the first member 31. The second member 32 can be fixed to the second member 32 by inserting the protrusion 36 of the second member 32 between a pair of locking plates 34 and engaging the locking claws with each other. In this state, the joiner 30 fixed to the ceiling base material 10A can support the end 21 by pinching it. Similarly, the joiner 30 fixed to the ceiling base material 10B can support the end 22 by pinching it. At the same time, the first piece 43, the second piece 44, and the third piece 45 of the support hardware 40 that holds the end 21 are supported by the joiner 30. The first piece 53 , second piece 54 , and third piece 55 of the support hardware 50 that holds the end 22 are supported by the joiner 30 .

[0070] The ceiling surface material 20 is supported by a pair of ceiling base materials 10A, 10B by a joiner 30 and support metal fittings 40, 50. The bottom plate 35 of the joiner 30 can receive the ends 21, 22 of the ceiling surface material 20 from below.

[0071] [Functions and Effects of the Ceiling Structure 100 According to the Embodiment] The ceiling structure 100 of this embodiment comprises a pair of ceiling underlayment materials 10A, 10B extending in the Y-axis direction (first direction) and facing each other in the X-axis direction (second direction) that intersects the Y-axis direction, a ceiling surface material 20 supported by the pair of ceiling underlayment materials 10A, 10B, a joiner 30 attached to the underside of the pair of ceiling underlayment materials 10A, 10B and holding ends 21, 22 of the ceiling surface material 20 facing each other in the X-axis direction, and support metal fittings 40, 50 attached to the ends 21, 22 of the ceiling surface material 20 and engaged with the ceiling underlayment materials 10A, 10B, and the ceiling surface material 20 is supported by the joiner 30 and the support metal fittings 40, 50.

[0072] According to the ceiling structure 100, the support metal fittings 40, 50 attached to the ends 21, 22 of the ceiling surface material 20 are engaged with the ceiling base material 10A, 10B, so that the ceiling surface material 20 can be supported via the support metal fittings 40, 50. This eliminates the need to temporarily fasten the ceiling surface material to the ceiling base material using double-sided tape, as in the past. As a result, the construction work on site can be reduced. According to the ceiling structure 100, the number of work steps during construction on site can be reduced.

[0073] Furthermore, in the ceiling structure 100, the ceiling surface material 20 can be supported by the support metal fittings 40, 50 in addition to the joiner 30, so that the ceiling surface material 20 is less likely to fall when a horizontal force due to an earthquake is applied. Also, in the ceiling structure 100, the support metal fittings 40, 50 can be engaged with the ceiling base materials 10A, 10B at a different height position from the joiner 30. This makes it less likely that the ceiling surface material 20 will fall when the ceiling structure 100 vibrates in the X-axis direction during an earthquake.

[0074] In addition, "engaging" as used here includes placing a portion of the support hardware 40, 50 on the upper surface, which is part of the ceiling base material 10, and magnetically attaching a portion of the support hardware 40, 50 to the side, which is also part of the ceiling base material 10.

[0075] In the ceiling structure 100, the joiner 30 may be made of resin.

[0076] According to the ceiling structure 100 having this configuration, since the joiner 30 is made of resin, it is possible to reduce the weight compared to a metal joiner. Therefore, a lightweight ceiling having fall safety can be realized, and measures against falling off can be eliminated. Furthermore, according to the ceiling structure 100 having this configuration, even if the resin joiner 30 is burned during a fire, for example, the ceiling surface material 20 can be supported by the support metal fittings 40, 50. This makes it possible to prevent the ceiling surface material 20 from falling during a fire. In the ceiling structure 100, since the ceiling surface material 20 can be supported by the support metal fittings 40, 50, it is possible to prevent the ceiling surface material 20 from falling even if the support force of the joiner 30 is lost.

[0077] In addition, in the ceiling structure 100, the joiner 30 has a first member 31 that is attached to the underside of the ceiling base materials 10A, 10B, and a second member 32 that is attached to the first member 31 from below and supports the underside of the ceiling surface material 20.

[0078] According to the ceiling structure 100 having this configuration, since the joiner 30 is divided into the first member 31 and the second member 32, after the first member 31 is attached to the ceiling base materials 10A, 10B, the ceiling surface material 20 is supported via the support metal fittings 40, 50, and then the second member 32 can be attached to the first member 31 from below. This allows the ceiling surface material 20 to be supported by being sandwiched between the first member 31 and the second member 32. Since the second member 32 does not get in the way when placing the support metal fittings 40, 50 on the ceiling base materials 10A, 10B, the work efficiency when placing the ceiling surface material 20 can be improved.

[0079] In addition, in the ceiling structure 100, the support hardware 40 has a locking piece 41 placed on the upper surface of the ceiling base material 10A, a hanging piece 42 hanging down from the locking piece 41 along the side of the ceiling base material 10A, a first piece 43 bent from the hanging piece 42 and positioned along the upper surface of the ceiling surface material 20, a second piece 44 hanging down from the first piece 43 along the end face facing the X-axis direction of the ceiling surface material 20, and a third piece 45 bent from the second piece 44 and supporting the underside of the ceiling surface material 20.

[0080] With this configuration of ceiling structure 100, the support metal fitting 40 can be locked to the ceiling base material 10A by placing the locking piece 41 on the upper surface of the ceiling base material 10A. Furthermore, with the ceiling structure 100, the first piece 43 and the third piece 45 can be arranged so as to face each other vertically, and the ceiling surface material 20 can be supported by being sandwiched between the first piece 43 and the third piece 45. The first piece 43 and the third piece 45, which sandwich the ceiling surface material 20 between the top and bottom, are connected to the locking piece 41 via the hanging piece 42, and the ceiling surface material 20 is supported by the ceiling base material 10A.

[0081] In addition, in the ceiling structure 100, the support hardware 50 has a magnet 51 that is magnetically attached to the side of the ceiling base material 10B, a hanging piece 52 to which the magnet 51 is fixed and that hangs down along the side of the ceiling base material 10B, a first piece 53 that is bent from the hanging piece 52 and positioned along the upper surface of the ceiling surface material 20, a second piece 54 that hangs down from the first piece 53 along the end face facing the X-axis direction of the ceiling surface material 20, and a third piece 55 that is bent from the second piece 54 and supports the underside of the ceiling surface material 20.

[0082] According to the ceiling structure 100 having this configuration, the magnet 51 fixed to the hanging piece 52 is magnetically attached to the side of the ceiling substrate 10B, so that the support metal 50 can be easily attached to the ceiling substrate 10B. This reduces the work required for on-site construction. In the ceiling structure 100 having this configuration, the support metal 50 does not have a locking piece formed thereon, so that the locking piece does not get in the way when the hanging piece 52 and the magnet 51 are arranged between the ceiling substrates 10A and 10B. In addition, the support metal 50 is formed by bending a metal plate and has flexibility, so that the hanging piece 52 can be bent relative to the first piece 53 as shown in FIG. 9. This allows the hanging piece 52 to be bent and inserted between the ceiling substrates 10A and 10B. Therefore, the magnet 51 can be easily magnetically attached to the side of the ceiling substrate 10B.

[0083] The ceiling surface material installation method according to this embodiment is a ceiling surface material installation method for installing a ceiling surface material 20 to a pair of ceiling base materials 10A, 10B that extend in the Y-axis direction (first direction) and face each other in the X-axis direction (second direction) that intersects with the Y-axis direction, and includes the steps of attaching a joiner 30 to the pair of ceiling base materials 10A, 10B, attaching support metal fittings 40, 50 to both ends 21, 22 of the ceiling surface material 20 that face each other in the X-axis direction, and The method includes a step of attaching the support hardware 40 attached to one end 21 of the support hardware 40, 50 attached to one of the ceiling base materials 10A facing in the X-axis direction, a step of attaching the support hardware 50 attached to the other end 22 of the support hardware 40, 50 attached to both ends 21, 22 to the other ceiling base material 10B facing in the X-axis direction, and a step of fixing the ceiling surface material 20 to the ceiling base materials 10A, 10B using a joiner 30.

[0084] According to the ceiling surface material installation method of this embodiment, the support metal fittings 40, 50 attached to the ends 21, 22 of the ceiling surface material 20 are attached to the ceiling base materials 10A, 10B, so that the ceiling surface material 20 can be supported via the support metal fittings 40, 50. This eliminates the need to temporarily fasten the ceiling surface material 20 to the ceiling base materials 10A, 10B using double-sided tape, as in the past. As a result, the on-site construction work can be reduced.

[0085] In another aspect of the ceiling surface material installation method, the joiner 30 is made of resin and has a first member 31 that is attached to the underside of the ceiling base materials 10A, 10B, and a second member 32 that is attached to the first member 31 from below and supports the underside of the ceiling surface material 20, and the process of installing the joiner 30 includes a process of installing the first member 31 of the joiner 30 to the underside of the ceiling base materials 10A, 10B, and the process of fixing the ceiling surface material 20 to the ceiling base materials 10A, 10B includes a process of installing the second member 32 to the first member 31 from below, and supporting the ends 21, 22 of the ceiling surface material 20 by sandwiching them between the second member 32 and the first member 31.

[0086] According to the ceiling surface material mounting method of this embodiment, since the joiner 30 is made of resin, it can be made lighter than a metal joiner. Therefore, a lightweight ceiling with fall safety can be realized, and measures against falling off can be eliminated. Furthermore, according to the ceiling surface material mounting method of this embodiment, even if the resin joiner 30 is burned in the event of a fire, for example, the ceiling surface material 20 can be supported by the support metal fittings 40, 50. This prevents the ceiling surface material 20 from falling in the event of a fire.

[0087] According to this embodiment, since the joiner 30 is divided into the first member 31 and the second member 32, after the first member 31 is attached to the ceiling underlayment materials 10A, 10B, the ceiling surface material 20 is supported via the support metal fittings 40, 50, and then the second member 32 can be attached from below to the first member 31. This allows the ceiling surface material 20 to be supported by being sandwiched between the first member 31 and the second member 32 from above and below.

[0088] In another aspect of the ceiling surface material installation method, the support hardware 40 comprises a locking piece 41 placed on the upper surface of the ceiling base material 10A, a hanging piece 42 hanging down from the locking piece 41 along the side of the ceiling base material 10A, a first piece 43 bent from the hanging piece 42 and positioned along the upper surface of the ceiling surface material 20, a second piece 44 hanging down from the first piece 43 along the end face of the ceiling surface material facing the second direction, and a third piece bent from the second piece 44 to support the underside of the ceiling surface material 20. The process of attaching the support hardware 40 to the end 21 of the ceiling surface material 20 includes a process of fitting the portion having the first piece 43, the second piece, and the third piece to one end 21 of the ceiling surface material 20, and the process of attaching the support hardware 40 attached to one end 21 to one of the ceiling base materials 10A facing in the X-axis direction includes a process of engaging the engaging piece 41 of the support hardware 40 to the ceiling base material 10A by placing the engaging piece 41 on the upper surface of one of the ceiling base materials 10A.

[0089] According to this embodiment, the portion having the first piece 43, the second piece 44, and the third piece 45 can be fitted to one end 21 of the ceiling surface material 20, and the support metal 40 can be easily attached to one end 21 of the ceiling surface material 20. During construction on-site, the support metal can be reliably attached to the ceiling surface material without construction work. Also, according to this embodiment, the support metal attached to one end of the ceiling surface material can be placed on the upper surface of one of the ceiling base materials, thereby engaging the support metal with the ceiling base material. This allows one end of the ceiling surface material to be engaged with the ceiling base material before the other end.

[0090] As shown in Fig. 6, when the ceiling surface material 20 is supported by the joiner 30, the locking piece 41 and the lip (upper surface) 13 of the joiner 30 do not have to be in contact with each other. The locking piece 41 may simply be disposed above the joiner 30. For example, in the event of a fire, when the joiner 30 is burned and the ceiling surface material 20 and the support metal 40 move downward, the locking piece 41 only needs to be able to lock onto the ceiling base material 10A. "Supported by the support metal 40" may also include the case where a part of the support metal 40 is disposed above the ceiling base material 10, and the ceiling surface material 20 can be supported against the ceiling base material 10 after the support metal 40 moves downward.

[0091] In addition, the present invention is not limited to the configuration shown here, and may be implemented in other embodiments in which other components are combined with the configurations and the like of the above-mentioned embodiment. In this regard, the present invention may be modified within the scope of the gist of the present invention, and may be appropriately determined according to the application form.

[0092] [Variations] Although the ceiling structure 100 according to the above embodiment is exemplified as including the support metal fittings 40, 50, the ceiling structure 100 may be configured to include the support metal fitting 40 that supports the end portion 22, or may be configured to include the support metal fitting 50 that supports the end portion 21. The ceiling structure 100 may be configured to support the end portions 21, 22 only by the support metal fitting 40, or may be configured to support the end portions 21, 22 only by the support metal fitting 50.

[0093] In the ceiling structure 100 according to the above embodiment, the joiner 30 is made of resin, but the material of the joiner 30 is not limited, and it may be metal or another material.

[0094] In the ceiling structure 100 according to the embodiment described above, the joiner 30 is limited to having the first member 31 and the second member 32, but the joiner 30 may not be divided into multiple members. The joiner 30 may also have three or more members. The joiner 30 may be any member that can be fixed to the ceiling base material 10 and support the ceiling surface material 20. [Explanation of symbols]

[0095] 100:Ceiling structure 10, 10A, 10B: Ceiling underlayment 20: Ceiling surface material 21: End (one end of the ceiling surface material) 22: End (the other end of the ceiling surface material) 30:Joyner 31: First member 32: Second member 40,50: Support hardware X: X-axis direction (second direction) Y: Y axis direction (first direction) Z: Z-axis direction

Claims

1. A pair of ceiling underlayment materials extending in a first direction and facing each other in a second direction intersecting the first direction; A ceiling surface material supported by the pair of ceiling base materials; a joiner attached to the lower surfaces of the pair of ceiling base materials and holding the ends of the ceiling surface material facing in the second direction; A support metal fitting is attached to the end portion of the ceiling surface material and engaged with the ceiling base material, A ceiling structure, characterized in that the ceiling surface material is supported by the joiner and the supporting metal fittings.

2. The ceiling structure according to claim 1 , wherein the joiner is made of resin.

3. The joiner is A first member attached to the underside of the ceiling base material; 3. The ceiling structure according to claim 1, further comprising: a second member attached to the first member from below and supporting the lower surface of the ceiling surface material.

4. The support metal fitting is A locking piece placed on the upper surface of the ceiling base material; A hanging piece that hangs down from the locking piece along a side surface of the ceiling base material; A first piece bent from the hanging piece and arranged along an upper surface of the ceiling surface material; a second piece that hangs down from the first piece along an end surface of the ceiling surface material that faces the second direction; 3. The ceiling structure according to claim 1 or 2, further comprising: a third piece bent from the second piece and supporting the underside of the ceiling surface material.

5. The support metal fitting is A magnet that is magnetically attached to a side surface of the ceiling base material; A hanging piece to which the magnet is fixed and which hangs down along a side surface of the ceiling base material; A first piece bent from the hanging piece and arranged along an upper surface of the ceiling surface material; a second piece that hangs down from the first piece along an end surface of the ceiling surface material that faces the second direction; 3. The ceiling structure according to claim 1 or 2, further comprising: a third piece bent from the second piece and supporting the underside of the ceiling surface material.

6. A ceiling surface material installation method for installing a ceiling surface material to a pair of ceiling underlayment materials extending in a first direction and facing each other in a second direction intersecting the first direction, comprising: Attaching a joiner to the pair of ceiling base materials; Attaching support metal fittings to both ends of the ceiling surface material facing in the second direction; A step of attaching the support metal attached to one end of the support metal attached to both ends to one of the ceiling base materials facing in the second direction; A step of attaching the support metal attached to the other end of the support metal attached to both ends to the other ceiling base material facing in the second direction; and a step of fixing the ceiling surface material to the ceiling base material using the joiner.

7. The joiner is made of resin, A first member attached to the underside of the ceiling base material; A second member is attached to the first member from below and supports the lower surface of the ceiling surface material, The step of attaching the joiner includes a step of attaching the first member of the joiner to the underside of the ceiling base material, The method for installing a ceiling surface material according to claim 6, characterized in that the step of fixing the ceiling surface material to the ceiling base material includes a step of attaching the second member to the first member from below and supporting the end of the ceiling surface material by sandwiching it between the second member and the first member.

8. The support metal fitting is A locking piece placed on the upper surface of the ceiling base material; A hanging piece that hangs down from the locking piece along a side surface of the ceiling base material; A first piece bent from the hanging piece and arranged along an upper surface of the ceiling surface material; a second piece that hangs down from the first piece along an end surface of the ceiling surface material that faces the second direction; A third piece bent from the second piece and supporting the lower surface of the ceiling surface material, The step of attaching the support metal to the end of the ceiling surface material includes a step of fitting a portion having the first piece, the second piece, and the third piece to the one end of the ceiling surface material, A method for installing a ceiling surface material as described in claim 6 or 7, characterized in that the process of attaching the support metal attached to one end to one of the ceiling base materials opposing the second direction includes a process of engaging the locking piece of the support metal to the ceiling base material by placing the locking piece on the upper surface of the one of the ceiling base materials.

Images