Ceiling structure and short length hardware

Abstract

To provide a ceiling structure and short length hardware capable of suppressing deflection of a parting member covering an end part of ceiling surface material from below.SOLUTION: A ceiling structure 100 is provided with: a plurality of ceiling joist receivers 3 facing a first direction and extending in a second direction intersecting the first direction; a plurality of ceiling substrates 10 facing the second direction and extending in the first direction, supported on the plurality of ceiling joist receivers 3; a plurality of short length hardware 200 arranged between the plurality of ceiling substrates 10 in the second direction and supported on the ceiling joist receivers 3; ceiling surface material 20 supported on the plurality of ceiling substrates 10; joiners 30 attached on a lower surface of the plurality of ceiling substrates 10 to support end parts of the ceiling surface material 20 facing the second direction; and a parting member 300 fixed on the plurality of ceiling surface material 20 and the short length hardware 200 and extending in the second direction to support end parts of the ceiling surface material 20 facing the first direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ceiling structure and short metal fittings. [Background technology]

[0002] The law requires that ceilings installed in rooms, corridors, and other places where people enter on a daily basis in buildings be protected from falling ceilings, depending on their placement conditions. On the other hand, if the mass of the ceiling surface components (ceiling underlayment and ceiling finishing materials) is less than 2 kg / m², for example, 2 In the following cases, no fall prevention measures 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. To create a lightweight ceiling that does not require measures to prevent falling, it is necessary to reduce the weight of the ceiling substrate, ceiling finish material, or both. For example, aluminum material is often used to reduce the weight of the ceiling substrate, but this can increase costs compared to steel substrates.

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

[0005] Another known fixing structure for ceiling finishing materials (lightweight non-combustible boards) is to use hat-shaped joiners to fix the ceiling finishing material to the siding support. In this structure, the siding support is supported using hanging bolts, and the siding is supported to the siding support via clips. In this structure, the bottom of the siding and the hat-shaped joiner are positioned opposite each other, and the edge of the ceiling finishing material is clamped and fixed between the bottom of the siding and the hat-shaped joiner. The hat-shaped joiner is fixed to the siding 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 prior art, there have been cases where the trim material arranged to cover the end of the ceiling surface material from below has been deflected.

[0008] The present invention aims to provide a ceiling structure and short metal fittings that can suppress the deflection of a trim material that covers the end of a ceiling surface material from below. [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 as follows: A plurality of sill supports facing each other in a first direction and extending in a second direction intersecting the first direction; A plurality of ceiling underlayment materials facing the second direction, extending in the first direction, and supported by the plurality of joist supports; In the second direction, a plurality of short metal fittings are arranged between the plurality of ceiling substrates and supported by the joist support; A ceiling surface material supported by the plurality of ceiling substrates; a joiner attached to the underside of the plurality of ceiling underlayments and holding the end portions of the ceiling surface materials facing in the second direction; It is characterized by comprising a trim material that is fixed to the multiple ceiling surface materials and the short metal fittings, extends in the second direction, and supports the ends of the ceiling surface materials that face the first direction.

[0010] According to this aspect, the trim can be fixed to the short metal fittings arranged between the multiple ceiling underlayments in the second direction, thereby suppressing deflection of the trim. Also, since the short metal fittings are shorter than the ceiling underlayments, the weight of the ceiling structure can be reduced. Furthermore, the trim can cover the end of the ceiling surface material from below, improving the design of the ceiling structure.

[0011] In another aspect of the present invention, The short metal fittings are A locking piece that is locked to the top of the soffit support; A hanging piece that hangs down from the locking piece and extends to a position below the soffit support; A bottom plate bent from the hanging piece at a position below the joist support and extending in a first direction below the joist support; a side plate bent from an end of the bottom plate in the second direction and extending upward, The trim material is disposed below the bottom plate and fixed to the bottom plate.

[0012] According to this aspect, a short metal fitting can be manufactured by bending a metal plate. According to this aspect, the locking piece can be bent to engage with the top of the siding support. In this aspect, the rigidity of the bottom plate is improved by providing side plates bent from the end of the bottom plate. Therefore, the trim can be stably supported.

[0013] In another aspect of the present invention, The short metal fittings are a pair of side plates bent from both end portions of the bottom plate in the second direction and extending upward, The upper ends of the pair of side panels are characterized in that they abut the bottom of the sill support.

[0014] In this embodiment, the upper ends of the pair of side panels abut against the bottom of the soffit support, thereby suppressing the vertical displacement of the short metal fittings, and thereby suppressing the displacement of the trim material fixed to the short metal fittings.

[0015] In another aspect of the present invention, The bottom plate and the side plate protrude in the second direction on the opposite side of the hanging piece relative to the sill support.

[0016] In this embodiment, the width of the bottom plate and the side plates is longer than the width of the siding support in the first direction, so that an area for fixing the trim can be secured reliably. Also, by lengthening the side plates, the rigidity of the bottom plate can be increased and deformation of the bottom plate can be suppressed.

[0017] In another aspect of the present invention, a support metal fitting attached to an end of the ceiling surface material in the second direction and engaged with the ceiling base material; The ceiling surface material is characterized in that it is supported by the joiner, the support metal fittings, and the trim material.

[0018] In this embodiment, the support metal attached to the end of the ceiling surface material in the second direction is engaged with the ceiling base material, thereby supporting the ceiling surface material via the support metal. 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.

[0019] The short metal fittings according to the present invention are a locking piece that is locked to a top portion of a structural member extending in a predetermined direction; a hanging piece that hangs down from the engaging piece and extends to a position lower than the structural member; a bottom plate bent from the hanging piece at a position below the structural member and extending below the structural member in a direction intersecting the longitudinal direction of the structural member; and side plates bent from widthwise ends of the bottom plate and extending upward, The device is characterized in that it is arranged below the bottom plate and is capable of supporting an object by fixing it to the bottom plate.

[0020] According to this aspect, an object can be supported by a structural member extending in a predetermined direction via short metal fittings. By installing additional short metal fittings separately from the support structure for supporting the object, the number of points at which the object can be supported can be increased. This makes it possible to suppress deflection of the object. Furthermore, by shortening the length of the short metal fittings, weight reduction is achieved.

[0021] According to this aspect, a short metal piece can be manufactured by bending a metal plate. According to this aspect, the locking piece can be bent to engage with the top of a structural member. In this aspect, the rigidity of the bottom plate is improved by providing side plates bent from the end of the bottom plate. Therefore, an object can be stably supported.

[0022] In another aspect of the present invention, a pair of side plates bent from both ends of the bottom plate in the width direction and extending upward; The upper ends of the pair of side plates are capable of abutting against the bottom of the structural member.

[0023] In this embodiment, the upper ends of the pair of side plates abut against the bottom of the structural member, thereby suppressing the vertical displacement of the short metal fittings, thereby suppressing the displacement of the object fixed to the short metal fittings. [Effects of the Invention]

[0024] As can be understood from the above explanation, it is possible to provide a ceiling structure that can suppress deflection of the trim material that covers the end of the ceiling surface material from below. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 2 is a cross-sectional view showing an example of a ceiling structure according to an embodiment, taken along the YZ plane. [Figure 2] FIG. 1 is a front view showing an example of a ceiling structure according to an embodiment. [Figure 3] FIG. 1 is a plan view showing an example of a ceiling structure according to an embodiment. [Figure 4] FIG. 10 is a cross-sectional view showing an example of a joiner according to a modified example. [Figure 5] 1 is a perspective view showing an example of a ceiling structure according to an embodiment; [Figure 6] FIG. 1 is a perspective view showing an example of a ceiling surface material to which a support metal fitting is attached. [Figure 7] FIG. 10 is a perspective view showing an example of a support metal fitting. [Figure 8] FIG. 10 is a perspective view showing an example of a support metal fitting. [Figure 9] FIG. 2 is a cross-sectional view showing an example of a ceiling underlayment, a first member of a joiner, and a screw. [Figure 10] A cross-sectional view showing an example of a ceiling underlayment, a joiner, a support metal fitting, and an end portion of a ceiling surface material. [Figure 11] A cross-sectional view showing an example of a ceiling underlayment, a joiner, a support metal fitting, and an end portion of a ceiling surface material. [Figure 12] A cross-sectional view showing one support metal fitting being inserted between a pair of ceiling underlayment materials. [Figure 13] This is a cross-sectional view showing a state in which one support metal is being engaged with one ceiling substrate and the other support metal is being magnetically attached to the other ceiling substrate. [Figure 14] A cross-sectional view showing a state in which both support fittings are attached to a pair of ceiling underlayment materials, supporting the ceiling surface material. [Figure 15] A cross-sectional view showing a ceiling surface material supported on a pair of ceiling underlayment materials using support metal fittings and joiners. [Figure 16] 1 is a process diagram showing the steps of a ceiling surface material mounting method according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, a ceiling structure 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, and redundant description may be omitted.

[0027] [Ceiling structure 100 according to the embodiment] The ceiling structure 100 will be described with reference to Figures 1 to 5. Figure 1 is a cross-sectional view showing an example of the ceiling structure 100 according to the embodiment, taken along the YZ plane. Figure 2 is a front view showing an example of the ceiling structure 100 according to the embodiment. Figure 3 is a plan view showing an example of the ceiling structure 100 according to the embodiment. Figure 4 is a cross-sectional view showing an example of a joiner 300B according to a modified example. Figure 5 is a perspective view showing an example of the ceiling structure 100 according to the embodiment. Note that in each figure, arrows are shown indicating the X-axis direction, Y-axis direction, and Z-axis direction, which are orthogonal to each other. The X-axis direction is an example of the second direction. The Y-axis direction is an example of the first direction. The Z-axis direction is along the up-down direction.

[0028] As shown in Figures 1 to 3, the ceiling structure 100 includes a plurality of joist supports 3, a plurality of ceiling underlayment materials 10 (see Figure 5), a plurality of short metal fittings 200, a ceiling surface material 20, and a trim material 300. First, the short metal fittings 200 and the trim material 300 will be described with reference to Figures 1 to 3.

[0029] [Short metal fittings 200] The short metal fittings 200 are arranged between the multiple ceiling sub-floor materials 10 shown in Figure 5. Note that the short metal fittings 200 are not shown in Figure 5. The short metal fittings 200 are arranged between the multiple ceiling sub-floor materials 10 in the X-axis direction. One or more short metal fittings 200 may be arranged between the ceiling sub-floor materials 10. The short metal fittings 200 are attached to the joist support 3.

[0030] The short metal fitting 200 comprises a locking piece 210 that locks onto the upper flange 3a that is the top part of the soffit support 3, a hanging piece 220 that hangs down from the locking piece 210 and extends to a position below the soffit support 3, a bottom plate 230 that is bent from the hanging piece 220 at a position below the soffit support 3 and extends in the Y-axis direction (first direction) below the soffit support 3, and a side plate 240 that is bent from the end of the bottom plate 230 in the X-axis direction (second direction) and extends upward. The trim material 300 is disposed below the bottom plate 230 and fixed to the bottom plate 230.

[0031] In Fig. 1, the locking piece 210 before being folded is shown by a two-dot chain line. In Fig. 1, the locking piece 210 after being folded and locked onto the upper flange 3a of the siding support 3 is shown by a solid line. In Fig. 3, the locking piece 210 before being folded is shown by a solid line. The locking piece 210 is placed on the upper flange 3a of the siding support 3, and is then bent and attached to the siding support 3. Note that the arrangement of the short metal fittings 200 may be in a different direction than that shown in Fig. 1, and the hanging piece 220 may be arranged on the opening side of the siding support 3.

[0032] The thickness direction of the locking piece 210 on the upper flange 3a of the siding support 3 is along the Z-axis direction. The thickness direction of the tip of the bent locking piece 210 is along, for example, the Y-axis direction. The tip of the locking piece 210 may abut against the web 3b of the siding support 3.

[0033] The hanging piece 220 is bent from the locking piece 210 and extends downward. The thickness direction of the hanging piece 220 is along the Y-axis direction. The short metal fitting 200 extends in the Z-axis direction from near the upper flange 3a of the siding support 3 to a position below the lower flange 3c. The lower end of the hanging piece 220 extends to a position below the lower flange 3c.

[0034] The bottom plate 230 is bent from the lower end of the hanging piece 220 and extends in the Y-axis direction. The thickness direction of the bottom plate 230 is along the Z-axis direction. The tip of the bottom plate 230 protrudes in the Y-axis direction on the opposite side of the hanging piece 220 from the siding support 3. The length in the Y-axis direction of the bottom plate 230 and the side plate 240 is longer than the width in the Y-axis direction of the siding support 3.

[0035] As shown in Fig. 2, the pair of side plates 240 are spaced apart in the X-axis direction. The pair of side plates 240 are bent and extend upward from both ends of the bottom plate 230 in the X-axis direction. The thickness direction of the side plates 240 is along the X-axis direction. The upper ends of the side plates 240 may abut against the lower surface of the lower flange 3c of the siding support 3.

[0036] The short metal fittings 200 have a short length in the Y-axis direction. The short metal fittings 200 have a shorter length in the Y-axis direction than the ceiling underlayment material 10. The length in the Y-axis direction of the short metal fittings 200 may be, for example, three to ten times the width along the Y-axis direction of the joist support 3. The length in the Y-axis direction of the short metal fittings 200 may be, for example, three to ten times the width along the Y-axis direction of the trim material 300.

[0037] [Cutting material 300] As shown in Fig. 1, the parting material 300 is formed so as to cover the ends of the ceiling surface material 20 in the Y-axis direction from below. The parting material 300 covers the gap between the ends of the ceiling surface material 20 in the Y-axis direction from below. The parting material 300 extends in the X-axis direction along the ends of the ceiling surface material 20. The parting material 300 extends in the X-axis direction between ceiling underlayment materials 10 that face each other in the X-axis direction.

[0038] The trim material 300 has a first piece 310, a second piece 320, a third piece 330, and a fourth piece 340. The thickness direction of the first piece 310 is along the Z-axis direction. The first piece 310 is fixed to the bottom plate 230 of the short metal fitting 200. The first piece 310 is arranged between the ceiling surface material 20C and the bottom plate 230 in the Z-axis direction. Of the ceiling surface materials 20 adjacent in the Y-axis direction, one ceiling surface material 20 may be referred to as ceiling surface material 20C, and the other ceiling surface material 20 may be referred to as ceiling surface material 20D.

[0039] The second piece 320 is bent from the first piece 310 and hangs down. The thickness direction of the second piece 320 is along the Y-axis direction. The second piece 320 is arranged to a position below the ceiling surface material 20. The lower end of the second piece 320 is arranged below the underside of the ceiling surface material 20. The second piece 320 is arranged in the gap between opposing ceiling surface materials 20 in the Y-axis direction.

[0040] The third piece 330 is bent from the lower end of the second piece 320 and extends in the Y-axis direction. The third piece 330 protrudes from the second piece 320 on the opposite side of the first piece 310 in the Y-axis direction. The third piece 330 is arranged so as to cover the gap between the ceiling surface materials 20 from below. The tip of the third piece 330 is arranged in a position overlapping the ceiling surface material 20D when viewed in the Z-axis direction. The tip of the third piece 330 is the end farthest from the second piece 320 in the Y-axis direction. The third piece 330 is arranged below the lower surface of the ceiling surface material 20 in the Z-axis direction.

[0041] The fourth piece 340 is bent and extends upward from the tip of the third piece 330. The upper end of the fourth piece 340 abuts against the underside of the ceiling surface material 20D. The end of the ceiling surface material 20D in the Y-axis direction is supported by the parting material 300.

[0042] Furthermore, the end portion in the Y-axis direction of the ceiling surface material 20C and the first piece 310 of the parting material 300 are fixed to the bottom plate 230 of the short metal fitting 200 with screws 201.

[0043] In this way, in the ceiling structure 100, the parting material 300 is fixed to the short metal fittings 200 arranged between the ceiling substrate materials 10 in the X-axis direction. This prevents the parting material 300 from deflecting. For example, the short metal fittings 200 are arranged in the center between the ceiling substrate materials 10 in the X-axis direction.

[0044] [Actions and Effects of the Ceiling Structure 100 According to the Embodiment] The ceiling structure 100 of this embodiment comprises a plurality of joist supports 3 facing the Y-axis direction (first direction) and extending in the X-axis direction (second direction) that intersects with the Y-axis direction, a plurality of ceiling underlayment materials 10 facing the X-axis direction, extending in the Y-axis direction, and supported by the plurality of joist supports 3, a plurality of short metal fittings 200 arranged between the plurality of ceiling underlayment materials 10 in the X-axis direction and supported by the joist supports 3, a ceiling surface material 20 supported by the plurality of ceiling underlayment materials 10, a joiner 30 attached to the underside of the plurality of ceiling underlayment materials 10 and holding the ends of the ceiling surface material 20 facing in the X-axis direction, and a trim material 300 fixed to the plurality of ceiling surface materials 20 and the short metal fittings 200, extending in the X-axis direction, and supporting the end of the ceiling surface material 20 facing in the Y-axis direction.

[0045] According to the ceiling structure 100 of this embodiment, the parting material 300 can be fixed to the short metal fittings 200 arranged between the multiple ceiling underlayment materials 10 in the second direction, thereby suppressing deflection of the parting material 300. Furthermore, since the short metal fittings 200 are shorter in length than the ceiling underlayment materials 10, the weight of the ceiling structure 100 can be reduced. Furthermore, the parting material 300 can cover the end of the ceiling surface material 20 from below, thereby improving the design of the ceiling structure 100.

[0046] In addition, in the ceiling structure 100, the short metal fittings 200 include a locking piece 210 that locks onto the upper flange (top part) 3a of the soffit support 3, a hanging piece 220 that hangs down from the locking piece 210 and extends to a position below the soffit support 3, a bottom plate 230 that is bent from the hanging piece 220 at a position below the soffit support 3 and extends in the Y-axis direction below the soffit support 3, and a side plate 240 that is bent from the end of the bottom plate 230 in the X-axis direction and extends upward, and the trim material 300 is positioned below the bottom plate 230 and fixed to the bottom plate 230.

[0047] According to the ceiling structure 100 of this embodiment, a short metal fitting 200 can be manufactured by bending a metal plate. According to the ceiling structure 100 of this embodiment, the locking piece 210 can be bent to engage with the upper flange 3a of the siding support 3. In this embodiment, the rigidity of the bottom plate 230 is improved by providing the side plate 240 bent from the end of the bottom plate 230. Therefore, the parting material 300 can be stably supported.

[0048] In addition, in the ceiling structure 100, the short metal fittings 200 are bent from both ends of the bottom plate 230 in the X-axis direction and have a pair of side plates 240 extending upward, and the upper ends of the pair of side plates 240 may abut the bottom of the soffit support 3.

[0049] In the ceiling structure 100 of this embodiment, the upper ends of the pair of side panels 240 are abutted against the bottom of the joist support 3, thereby suppressing vertical displacement of the short metal fittings 200. This makes it possible to suppress displacement of the trim material 300 fixed to the short metal fittings 200.

[0050] Furthermore, in the ceiling structure 100, the bottom plate 230 and the side plate 240 may protrude from the joist support 3 on the opposite side of the hanging piece 220 in the X-axis direction.

[0051] In the ceiling structure 100 of this embodiment, the bottom plate 230 and the side plates 240 are longer than the width of the joist support 3 along the Y-axis direction, so that an area for fixing the trim 300 can be stably secured. Furthermore, by lengthening the side plates 240, the rigidity of the bottom plate 230 can be increased, and deformation of the bottom plate 230 can be suppressed.

[0052] The ceiling structure 100 also includes support metal fittings 40, 50 that are attached to the ends 21, 22 of the ceiling surface material 20 in the X-axis direction and are engaged with the ceiling underlayment material 10, and the ceiling surface material 20 is supported by joiners 30, support metal fittings 40, 50, and trim 300. The joiners 30 and support metal fittings 40, 50 will be described later.

[0053] In the ceiling structure 100 of this embodiment, the support metal fittings 40, 50 attached to the ends 21, 22 of the ceiling surface material 20 in the X-axis direction are engaged with the ceiling base material 10, thereby supporting the ceiling surface material 20 via the support metal fittings 40, 50. This eliminates the need to temporarily fasten the ceiling surface material 20 to the ceiling base material 10 using double-sided tape, as in the past. As a result, it is possible to reduce the amount of work required for construction on site. This will be described in more detail below.

[0054] [Action and effect of the short metal fitting 200 according to the embodiment] The short metal fitting 200 in this embodiment comprises a locking piece 210 that locks onto the upper flange (top part) 3a of the siding support (structural member) 3 extending in the X-axis direction (a specified direction), a hanging piece 220 that hangs down from the locking piece 210 and extends to a position lower than the siding support 3, a bottom plate 230 that is bent from the hanging piece 220 at a position lower than the siding support 3 and extends in the Y-axis direction below the siding support 3 and intersects with the longitudinal direction of the siding support 3, and a side plate 240 that is bent from the end of the bottom plate 230 in the width direction and extends upward, and can fix and support a trim material (object) 300 arranged below the bottom plate 230 to the bottom plate 230.

[0055] According to the short metal fittings 200 of this embodiment, the target object, the trim material 300, can be supported via the short metal fittings 200 on the siding support 3, which is a structural member extending in a predetermined direction. By installing additional short metal fittings 200 separately from the support structure for supporting the target object (for example, ceiling underlayment material 10), the number of points for supporting the target object can be increased. This makes it possible to suppress deflection of the target object. Furthermore, the short metal fittings 200 are made lighter by shortening their length.

[0056] Although the siding support 3 is shown as an example of a structural member extending in a predetermined direction, the structural member to which the short metal fittings 200 are fastened is not limited to the siding support 3. The structural member may be any other rod-shaped member, such as a bar or a beam.

[0057] Although the trim 300 is shown as an example of an object supported by the short metal fitting 200, the object supported by the short metal fitting 200 is not limited to the trim 300. The object may be, for example, a joiner or any other structure.

[0058] In addition, the short metal fittings 200 are provided with a pair of side plates 240 that are bent from both ends of the bottom plate 230 in the X-axis direction and extend upward, and the upper ends of the pair of side plates 240 are able to abut against the lower flange (bottom) 3c of the siding support 3.

[0059] In the short metal fitting 200 of this embodiment, the upper ends of the pair of side panels 240 are abutted against the lower flange 3c of the siding support 3, thereby suppressing vertical displacement of the short metal fitting 200. This makes it possible to suppress displacement of an object fixed to the short metal fitting 200.

[0060] [Modified Example: Trim 300B] FIG. 4 illustrates a modified parting material 300B and cap 301. As shown, parting material 300B may be a hat-shaped joiner. Furthermore, cap 301 may be attached so as to cover the recessed portion of parting material 300B from below. This allows the recessed portion of parting material 300B to be hidden from view from below. As a result, the design of ceiling structure 100 can be improved.

[0061] [Ceiling structure 100 according to the embodiment] Next, an example of a ceiling structure 100 to which the short metal fittings 200 and the trimming member 300 are applied will be described with reference to FIGS. 5 to 16. FIG. 5 is a perspective view showing an example of the ceiling structure 100 according to the embodiment. FIG. 6 is a perspective view showing an example of a ceiling surface material 20 to which support metal fittings 40 and 50 are attached. FIG. 7 is a perspective view showing an example of the support metal fitting 40. FIG. 8 is a perspective view showing an example of the support metal fitting 50. FIG. 9 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. 10 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. 11 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.

[0062] FIG. 12 is a cross-sectional view showing one support metal fitting 40 being inserted between a pair of ceiling substrates 10A and 10B. FIG. 13 is a cross-sectional view showing one support metal fitting 40 being engaged with one ceiling substrate 10A and the other support metal fitting 50 being magnetically attached to the other ceiling substrate 10B. FIG. 14 is a cross-sectional view showing both support metal fittings 40 and 50 attached to a pair of ceiling substrates 10A and 10B, supporting a ceiling surface material 20. FIG. 15 is a cross-sectional view showing a pair of ceiling substrates 10A and 10B, supporting a ceiling surface material 20 using support metal fittings 40 and 50 and a joiner 30. Arrows indicating mutually orthogonal X-axis, Y-axis, and Z-axis directions may be appropriately illustrated in each figure. The X-axis and Y-axis directions are horizontal. The Z-axis direction is vertical.

[0063] [Ceiling Structure 100] The ceiling structure 100 shown in Fig. 5 is a ceiling structure for a building. The ceiling structure 100 includes a plurality of suspension bolts 1 extending in the vertical direction, hangers 2 attached to the lower ends of the suspension bolts 1, joist supports 3 supported by the hangers 2, and clips 4 attached to the joist supports 3.

[0064] A suspension bolt 1 extends downward from, for example, a reinforced concrete slab. A hanger 2 is fixed to the lower end of the suspension bolt 1 to support a soffit support 3. Multiple soffit supports 3 are spaced apart in the Y-axis direction and extend in the X-axis direction. One soffit support 3 is supported by multiple suspension bolts 1 and hangers 2. Multiple clips 4 are attached to the soffit support 3. The clips 4 engage the ceiling underlayment material 10 from above.

[0065] The ceiling structure 100 includes a ceiling underlayment 10, a ceiling surface material 20 shown in FIG. 6, support metal fittings 40, 50, and a joiner 30 shown in FIGS.

[0066] [Ceiling underlayment material 10] As shown in FIG. 5, 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 support 3 are arranged to form a grid pattern in a plan view.

[0067] As shown in Figures 9 to 15, one of a pair of ceiling substrates 10 facing each other in the X-axis direction is referred to as ceiling substrate 10A, and the other is referred to as ceiling substrate 10B. , 10B are not distinguished from each other, they are referred to as ceiling underlayment material 10.

[0068] As shown in Figure 9, 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 also 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.

[0069] 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 10. The inner ends of the pair of lips 13 in the X-axis direction may be bent downward.

[0070] [Ceiling surface material 20] As shown in FIG. 2, the ceiling surface material 20 is plate-shaped. The thickness direction of the ceiling surface material 20 is along the Z-axis direction. The ceiling surface material 20 is rectangular in 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 a ceiling underlayment material 10 shown in FIG. 5.

[0071] The ceiling surface material 20 may be square or rectangular. The ceiling surface material 20 is made of, for example, a non-combustible material. The thickness of the ceiling surface material 20 may be, for example, 4 mm, 4.5 mm, 9 mm, or any other value. The weight per unit area of ​​the ceiling surface material 20 is, for example, 500 g / m 2 700g / m 2 Well, 860g / m 2 Other values ​​are also possible.

[0072] The dimensions of one ceiling surface material 20 may be, for example, 1P x 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.

[0073] [Support hardware 40] As shown in FIG. 6, the support metal fitting 40 supports one end 21 of the ceiling surface material 20. The support metal fitting 40 may also support the other end 22 of the ceiling surface material 20. Multiple support metal fittings 40 are arranged at predetermined intervals in the Y-axis direction. As shown in FIGS. 7 and 10, 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 press-forming 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 sandwich and support the end 21 of the ceiling surface material 20.

[0074] [Latching piece 41] The 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 greater than the width of the lip 13. The width is the length in a direction intersecting the longitudinal direction. The width of the locking piece 41 and the width of the lip 13 are lengths in the X-axis direction. As shown in Figure 6, the tip 41a of the locking piece 41 is positioned inside the inner end 13a of the lip 13.

[0075] [Drooping piece 42] The 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 downward. The length of the hanging piece 42 in the Z-axis direction is longer than the length of the side panel 12 in the Z-axis direction. The hanging piece 42 hangs down along the side panel 12 of the ceiling underlayment 10A. The hanging piece 42 and the side panel 12 face each other in the X-axis direction. A gap may be formed between the outer surface of the side panel 12 and the hanging piece 42 in the X-axis direction. The outer surface of the side panel 12 is an example of a side surface of the ceiling underlayment 10.

[0076] [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 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 positioned 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.

[0077] [Second piece 44] The second piece 44 is bent and extends downward from the inner end of the first piece 43. The 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.

[0078] [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 located at approximately the same position as the hanging piece 42 in the X-axis direction.

[0079] 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 portion 21 of the ceiling surface material 20 is disposed between the first piece 43 and the third piece 45. The end portion 21 is sandwiched between the first piece 43 and the third piece 45 in the Z-axis direction. The lower surface of the first piece 43 abuts against the upper surface of the end portion 21. The upper surface of the third piece 45 abuts against the lower surface of the end portion 21. In the X-axis direction, a gap may be formed between the second piece 44 and the end surface of the end portion 21. The end surface of the end portion 21 may be a YZ plane. The end portions 21, 22 include end surfaces that face each other in the X-axis direction.

[0080] [Support hardware 50] As shown in FIG. 6, 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. Multiple support metal fittings 50 are disposed at predetermined intervals in the Y-axis direction. As shown in FIGS. 8 and 11, 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.

[0081] [Magnet 51] The magnet 51 is, for example, plate-shaped. The 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 glued 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 the side surface of the ceiling base material 10B.

[0082] [Drooping piece 52] The 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.

[0083] [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 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.

[0084] [Second piece 54] The second piece 54 is bent and extends downward from the inner end of the first piece 53. The 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.

[0085] [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 located at approximately the same position as the hanging piece 52 in the X-axis direction.

[0086] The first piece 53, the second piece 54, and the third piece 55 of the support metal fitting 50 may have the same configuration as the first piece 43, the second piece 44, and the third piece 45 of the support metal fitting 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 portion 22 of the ceiling surface material 20 is disposed between the first piece 53 and the third piece 55. The end portion 22 is sandwiched between the first piece 53 and the third piece 55 in the Z-axis direction. The lower surface of the first piece 53 abuts against the upper surface of the end portion 22. The upper surface of the third piece 55 abuts against the lower surface of the end portion 22. In the X-axis direction, a gap may be formed between the second piece 54 and the end surface of the end portion 22. The end surface of the end portion 22 may be a YZ plane.

[0087] [Joiner30] As shown in Figures 10, 11, and 15, the joiner 30 is attached to the underside of a pair of ceiling underlayment materials 10A, 10B. As shown in Figure 15, 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 underlayment 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 also be made of metal. The joiner 30 has enough strength to hold the ends 21, 22 of the joiner 30.

[0088] [First member 31] As shown in Figures 10 and 11, 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 underlayment 10. As shown in Figure 5, the first member 31 includes a top plate 33 and a pair of locking plates 34. Figure 9 shows the first member 31 and screws 5 in a state before being attached to the ceiling underlayment 10.

[0089] 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 FIGS. 10 and 11, the top plate 33 and the bottom plate 11 abut in the Z-axis direction.

[0090] The pair of locking plates 34 are arranged 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 arranged 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.

[0091] [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 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 arranged to face each other in the Z-axis direction.

[0092] 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.

[0093] As shown in Figure 10, the end portion 21, first piece 43, second piece 44, and third piece 45 are arranged in the gap between the top plate 33 and bottom plate 35 of one joiner 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 part of the support metal fitting 40 are sandwiched and supported by the top plate 33 and bottom plate 35 of the joiner 30. The bottom plate 35 can support the end portion 21 and part of the support metal fitting 40 from below.

[0094] As shown in Figure 7, the end portion 22, first piece 53, second piece 54, and third piece 55 are arranged in the gap between the top plate 33 and 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 part of the support metal fitting 50 are sandwiched and supported by the top plate 33 and bottom plate 35 of the joiner 30. The bottom plate 35 can support the end portion 22 and part of the support metal fitting 50 from below.

[0095] [How to install ceiling surface material] Next, a method for installing a ceiling surface material will be described. Fig. 16 is a process diagram showing the steps of the method for installing a ceiling surface material according to an embodiment. In the method for installing a ceiling surface material, for example, the ceiling surface material 20 shown in Fig. 6 can be installed on the ceiling base material 10 shown in Fig. 5.

[0096] As shown in Figure 16, 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 hardware 40, 50 to the ends 21, 22 of the ceiling surface material 20 (step S12), engaging the support hardware 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 hardware 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).

[0097] In the process of attaching the first member 31 of the joiner 30 to the ceiling substrate 10 (step S11), as shown in FIG. 5, the first member 31 is fastened to the underside of the bottom plate 11 with a screw 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 substrate 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 positioned inside the ceiling substrate 10. As shown in FIG. 8, the first member 31 is attached to each of a pair of ceiling substrates 10A and 10B.

[0098] Next, in the process of attaching support metal fittings 40, 50 to ends 21, 22 of ceiling surface material 20 (step S12), as shown in Figures 6 and 12, support metal fitting 40 is attached to one end 21 of ceiling surface material 20, and support metal fitting 50 is attached to the other end 22. End 21 is sandwiched vertically between first piece 43 and third piece 45, and end 22 is sandwiched vertically between first piece 53 and third piece 55. As shown in Figure 6, hanging piece 42 of support metal fitting 40 extends above ceiling surface material 20. Hanging piece 52 of support metal fitting 50 extends above ceiling surface material 20.

[0099] Next, in the process (step S13) of engaging the support metal fitting 40 attached to one end 21 with the upper surface of the ceiling substrate 10A, as shown in Figures 8 and 9, the support metal fitting 40 is inserted between the pair of ceiling substrates 10A, 10B, and the engaging piece 41 is placed on the upper surface of the lip 13 of the ceiling substrate 10A. This allows the engaging piece 41 of the support metal fitting 40 to be formed on the upper surface of the lip 13 of the ceiling substrate 10A.

[0100] Next, in the process (step S14) of magnetically attaching the magnet 51 of the support metal fitting 50 attached to the other end 22 to the side surface of the ceiling base material 10, as shown in Figures 13 and 14, the support metal fitting 50 is inserted between the pair of ceiling base materials 10A, 10B, and the magnet 51 is magnetically attached to the side surface of the side panel 12 of the ceiling base material 10B. This fixes the support metal fitting 50 to the ceiling base material 10B. In this state, the end 21 of the ceiling face material 20 is supported by the ceiling base material 10A via the support metal fitting 40, and the end 22 of the ceiling face material 20 is supported by the ceiling base material 10B via the support metal fitting 50.

[0101] Next, in the process of attaching the second member 32 of the joiner 30 to the first member 31 (step S15), as shown in FIGS. 10, 11, and 15, 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 protrusions 36 of the second member 32 are inserted between a pair of locking plates 34, and the locking claws engage with each other, thereby securing the second member 32 to the second member 32. In this state, the joiner 30 secured to the ceiling base material 10A can be supported by clamping the end portion 21. Similarly, the joiner 30 secured to the ceiling base material 10B can be supported by clamping the end portion 22. At the same time, the first piece 43, second piece 44, and third piece 45 of the support hardware 40, which holds the end portion 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 .

[0102] The ceiling surface material 20 is supported by a pair of ceiling underlayment 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.

[0103] [Actions and Effects of the Ceiling Structure 100 According to the Embodiment] The ceiling structure 100 of this embodiment comprises a pair of ceiling substrates 10A, 10B extending in the Y-axis direction (first direction) and facing each other in the X-axis direction (second direction) that intersects with the Y-axis direction, a ceiling surface material 20 supported by the pair of ceiling substrates 10A, 10B, a joiner 30 attached to the underside of the pair of ceiling substrates 10A, 10B and holding the 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 substrates 10A, 10B, and the ceiling surface material 20 is supported by the joiner 30 and the support metal fittings 40, 50.

[0104] 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 materials 10A, 10B, thereby making it possible to support the ceiling surface material 20 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 was previously required. As a result, the amount of work required for on-site construction can be reduced. The ceiling structure 100 reduces the number of man-hours required for on-site construction.

[0105] 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, making it less likely that the ceiling surface material 20 will fall when a horizontal force caused by an earthquake is applied. Also, in the ceiling structure 100, the support metal fittings 40, 50 can be engaged with the ceiling underlayments 10A, 10B at a different height position than 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.

[0106] In addition, "engaging" as used here includes placing a portion of the support hardware 40, 50 on the top surface, which is part of the ceiling base material 10, and magnetically attaching a portion of the support hardware 40, 50 to the side surface, which is part of the ceiling base material 10.

[0107] In the ceiling structure 100, the joiner 30 may be made of resin.

[0108] In the ceiling structure 100 having this configuration, the joiner 30 is made of resin, which allows for a lighter weight compared to metal joiners. This allows for a lightweight ceiling that is safe from falling, eliminating the need for measures to prevent falling. Furthermore, in the ceiling structure 100 having this configuration, even if the resin joiner 30 is burned, for example, in the event of a fire, 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. In the ceiling structure 100, the ceiling surface material 20 can be supported by the support metal fittings 40, 50, so that the ceiling surface material 20 can be prevented from falling even if the support force of the joiner 30 is lost.

[0109] In addition, in the ceiling structure 100, the joiner 30 has a first member 31 attached to the underside of the ceiling base materials 10A, 10B, and a second member 32 attached to the first member 31 from below and supporting the underside of the ceiling surface material 20.

[0110] In the ceiling structure 100 configured as described above, the joiner 30 is divided into the first member 31 and the second member 32. Therefore, 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. When placing the support metal fittings 40, 50 on the ceiling base materials 10A, 10B, the second member 32 does not get in the way, which improves work efficiency when placing the ceiling surface material 20.

[0111] In addition, in the ceiling structure 100, the support metal fittings 40 have 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 opposite 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.

[0112] With this configuration of ceiling structure 100, by placing locking piece 41 on the upper surface of ceiling subfloor material 10A, support hardware 40 can be locked to ceiling subfloor material 10A. Furthermore, with ceiling structure 100, first piece 43 and third piece 45 can be arranged so as to face each other vertically, and these first piece 43 and third piece 45 can support ceiling surface material 20 by sandwiching it from above and below. First piece 43 and third piece 45, which sandwich ceiling surface material 20 from above and below, are connected to locking piece 41 via hanging piece 42, and ceiling surface material 20 is supported by ceiling subfloor material 10A.

[0113] 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 is 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 of the ceiling surface material 20 that faces in the X-axis direction, and a third piece 55 that is bent from the second piece 54 and supports the underside of the ceiling surface material 20.

[0114] According to the ceiling structure 100 having this configuration, the magnet 51 fixed to the hanging piece 52 is magnetically attached to the side surface of the ceiling substrate 10B, thereby easily attaching the support metal 50 to the ceiling substrate 10B. This reduces the on-site construction work. In the ceiling structure 100 having this configuration, the support metal 50 does not have a locking piece formed thereon, so the locking piece does not get in the way when positioning the hanging piece 52 and the magnet 51 between the ceiling substrates 10A and 10B. Furthermore, the support metal 50 is formed by bending a metal plate and is flexible, allowing the hanging piece 52 to bend relative to the first piece 53, as shown in FIG. 9 . This allows the hanging piece 52 to be inserted between the ceiling substrates 10A and 10B by bending the hanging piece 52. This allows the magnet 51 to be easily magnetically attached to the side surface of the ceiling substrate 10B.

[0115] Furthermore, the ceiling surface material mounting method according to this embodiment is a ceiling surface material mounting method for mounting 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 end portions 21, 22 of the ceiling surface material 20 that face each other in the X-axis direction; The method includes a step of attaching the support metal fitting 40 attached to one end 21 of the attached support metal fittings 40, 50 to one of the ceiling substrate materials 10A facing in the X-axis direction, a step of attaching the support metal fitting 50 attached to the other end 22 of the support metal fittings 40, 50 attached to both ends 21, 22 to the other ceiling substrate material 10B facing in the X-axis direction, and a step of fixing the ceiling surface material 20 to the ceiling substrate materials 10A, 10B using a joiner 30.

[0116] According to the ceiling surface material installation method of this embodiment, by attaching the support metal fittings 40, 50 attached to the ends 21, 22 of the ceiling surface material 20 to the ceiling base materials 10A, 10B, 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 work required for on-site installation can be reduced.

[0117] 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.

[0118] According to the ceiling surface material installation method of this embodiment, the joiner 30 is made of resin, which allows for a lighter weight compared to metal joiners. This makes it possible to achieve a lightweight ceiling that is safe from falling, and eliminates the need for measures to prevent falling. Furthermore, according to the ceiling surface material installation method of this embodiment, even if the resin joiner 30 is burned, for example, in the event of a fire, 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.

[0119] According to this embodiment, because 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.

[0120] 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 arranged 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 and supporting the underside of the ceiling surface material 20. The process of attaching the support metal fitting 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 metal fitting 40 attached to one end 21 to one ceiling base material 10A opposite in the X-axis direction includes a process of placing the locking piece 41 of the support metal fitting 40 on the upper surface of one ceiling base material 10A, thereby locking the locking piece 41 to the ceiling base material 10A.

[0121] 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 fitting 40 can be easily attached to one end 21 of the ceiling surface material 20. During on-site construction, the support metal fitting can be reliably attached to the ceiling surface material without any construction effort. Furthermore, according to this embodiment, the support metal fitting attached to one end of the ceiling surface material can be placed on the top surface of one of the ceiling base materials, thereby engaging the support metal fitting to the ceiling base material. This allows one end of the ceiling surface material to engage with the ceiling base material before the other end.

[0122] 10, 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 abut. The locking piece 41 may simply be arranged 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 fittings 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 fittings 40" may also include the case where a portion of the support metal fittings 40 is arranged above the ceiling base material 10, and after the support metal fittings 40 move downward, the ceiling surface material 20 can be supported relative to the ceiling base material 10.

[0123] It should be noted that the present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form.

[0124] [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.

[0125] 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 other materials.

[0126] In the ceiling structure 100 according to the above embodiment, the joiner 30 is limited to having a first member 31 and a 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 underlayment 10 and support the ceiling surface material 20. [Explanation of symbols]

[0127] 100: Ceiling structure 3: Rafter support (structural member) 3a: Upper flange (top of the joist, top of the structural member) 3c: Bottom flange (bottom of the sill support, bottom of the structural member) 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:Joiner 31: First member 32: Second member 40,50: Support hardware 200: Short metal fittings 210: Locking piece 220: Hanging piece 230: Bottom plate 240: Side panel 300: Trim material (object) X: X-axis direction (second direction) Y: Y-axis direction (first direction) Z: Z-axis direction

Claims

1. A plurality of sill supports facing each other in a first direction and extending in a second direction intersecting the first direction; A plurality of ceiling underlayment materials facing the second direction, extending in the first direction, and supported by the plurality of joist supports; In the second direction, a plurality of short metal fittings are arranged between the plurality of ceiling substrates and supported by the joist support; A ceiling surface material supported by the plurality of ceiling substrates; a joiner attached to the lower surfaces of the plurality of ceiling underlayments and holding the end portions of the ceiling surface materials facing in the second direction; A ceiling structure characterized by comprising a trim material fixed to the plurality of ceiling surface materials and the short metal fittings, extending in the second direction, and supporting the end of the ceiling surface material facing the first direction.

2. The short metal fittings are A locking piece that is locked to the top of the soffit support; A hanging piece that hangs down from the locking piece and extends to a position below the soffit support; A bottom plate bent from the hanging piece at a position below the joist support and extending in the first direction below the joist support; a side plate bent from an end of the bottom plate in the second direction and extending upward, 2. The ceiling structure according to claim 1, wherein the trim is disposed below the bottom plate and fixed to the bottom plate.

3. The short metal fittings are a pair of side plates bent from both end portions of the bottom plate in the second direction and extending upward, The ceiling structure according to claim 2, characterized in that the upper ends of the pair of side panels abut the bottom of the soffit support.

4. The ceiling structure according to claim 1 or 2, wherein the bottom plate and the side plate protrude from the soffit support on the opposite side of the hanging piece in the second direction.

5. a support metal fitting attached to an end of the ceiling surface material in the second direction and engaged with the ceiling base material; 2. The ceiling structure according to claim 1, wherein the ceiling surface material is supported by the joiner, the support metal fittings, and the trim material.

6. a locking piece that is locked to a top portion of a structural member extending in a predetermined direction; a hanging piece that hangs down from the engaging piece and extends to a position lower than the structural member; a bottom plate bent from the hanging piece at a position below the structural member and extending below the structural member in a direction intersecting the longitudinal direction of the structural member; and side plates bent from widthwise ends of the bottom plate and extending upward, A short metal fitting capable of fixing and supporting an object placed below the bottom plate to the bottom plate.

7. a pair of side plates bent from both ends of the bottom plate in the width direction and extending upward; A short metal fitting according to claim 6, characterized in that the upper ends of the pair of side plates are capable of abutting the bottom of the structural member.

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