Ceiling structure

Abstract

To provide a ceiling structure which can be easily and quickly dealt with on-site even when the height of the high ceiling portion and the low ceiling portion that make up the ceiling of the building is changed and which can prevent an increase in work load even when an indirect lighting component is divided.SOLUTION: The ceiling structure is configured so as to be divided into a pre-mounted member 11 mounted to a high ceiling portion 31 and having a hanging connecting surface portion 11b descending toward a low ceiling portion 32, and a post-mounted member 12 fixed to the pre-mounted member 11, the post-mounted member having an upright connection surface portion 12a rising toward a lamp installation surface portion 12b on which a lamp 13 is installed and a high ceiling portion 31, extending until the upper end thereof is higher than the lower end of the hanging connecting surface portion 11b of the pre-mounted member 11, and overlapping the hanging connecting surface portion 11b of the pre-mounted member 11. The hanging connecting surface portion 11b of the pre-mounted member 11 is provided with a temporarily attached portion 11c, while the upright connection surface portion 12a is provided with a temporarily attached portion 12a1 that can be temporarily attached to a temporarily attached portion 11c of the pre-mounted member 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ceiling structure for a building that has a high ceiling portion and a low ceiling portion that is located lower than the high ceiling portion. [Background technology]

[0002] In recent years, not only in buildings such as hotels, art museums, and commercial facilities, but also in ordinary detached houses, ceiling structures of folded or dropped ceilings (hereinafter collectively referred to as folded ceilings) consisting of a high ceiling section that is high above the floor and a low ceiling section may employ indirect lighting such as cove lighting (see, for example, Patent Document 1), which shines light from a light source section (lamp) toward the high ceiling section, and cornice lighting (see, for example, Patent Document 2), which shines light from a light source section (lamp) toward the wall surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 7-18309 [Patent Document 2] Japanese Utility Model Application Publication No. 63-123005 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the ceiling structures disclosed in the above-mentioned Patent Documents 1 and 2, the components that make up the indirect lighting (hereinafter referred to as indirect lighting components) are constructed as a single unit so that the spacing between them in the vertical direction cannot be adjusted. This creates the problem that if the heights of the high and low ceiling sections differ depending on the property or if the height between the high and low ceiling sections is changed due to ceiling height errors, etc., it is not easy to respond on site.

[0005] Furthermore, if the indirect lighting components were made into a divided structure so that the spacing between them in the vertical direction could be adjusted, the number of components (parts) would increase, which would increase the number of installation steps for the indirect lighting components, making the installation work more complicated and increasing the burden of the installation work.

[0006] Therefore, the present invention has been made to solve such problems, and aims to provide a ceiling structure that can easily and quickly respond on-site when the height of the high ceiling section and low ceiling section that make up the ceiling of a building is changed, and that can prevent the work burden from becoming too great even when the indirect lighting components are configured in separate parts. [Means for solving the problem]

[0007] In order to solve the above problem, the ceiling structure of the present invention is a ceiling structure comprising a high ceiling section and a low ceiling section arranged at a lower position than the high ceiling section, and comprises a leading-attachment member having a hanging connecting surface section that is attached to the high ceiling section and descends toward the low ceiling section, and a rear-attachment member that rises toward the high ceiling section and extends until its upper end is higher than the lower end of the hanging connecting surface section of the leading-attachment member, has an upright connecting surface section that overlaps the hanging connecting surface section of the leading-attachment member, and is fixed to the leading-attachment member, wherein the hanging connecting surface section of the leading-attachment member is provided with a temporary hanging portion, while the upright connecting surface section of the rear-attachment member is provided with a temporary hanging portion that is temporarily hung on the temporary hanging portion. Furthermore, in the ceiling structure of the present invention, the temporarily hung portion of the pre-attached member is provided with a female threaded hole that penetrates in the vertical direction, and a height adjustment screw whose tip abuts against the underside of the temporarily hung portion temporarily hung on the temporarily hung portion is screwed into the female threaded hole, and the installation height of the post-attached member relative to the pre-attached member can be adjusted by rotating the height adjustment screw. In the ceiling structure according to the present invention, the temporarily attached portion of the leading member is recessed from the lower end of the hanging connection surface of the leading member so that the wall side of the building becomes an opening end, and has at least an upper surface, a hanging surface, and a lower surface.Department a long loose hole is provided in the upper and lower portions of the post-attachment member, while a fixing portion is provided in the post-attachment member which is fixed by a fixing device such as a screw or bolt which is passed through the loose hole, and the post-attachment member is configured to be fixed at a different mounting height relative to the pre-attachment member by changing the height of the fixing device which is passed through the loose hole. The ceiling structure according to the present invention is also characterized in that the retrofit member is provided with a lamp mounting surface on which a lamp is to be mounted. Effect of the Invention

[0008] The ceiling structure of the present invention is divided into a leading-edge member which is attached to a high ceiling portion and has a hanging connecting surface portion which descends toward the low ceiling portion, and a rear-attaching member which is fixed to the leading-edge member, the leading-edge member having an upright connecting surface portion which rises toward the lamp installation surface portion on which the lamp is installed and the high ceiling portion and whose upper end portion extends higher than the lower end portion of the hanging connecting surface portion of the leading-edge member, and which overlaps with the hanging connecting surface portion of the leading-edge member.The leading-edge member has a temporary hanging portion on the hanging connecting surface portion, while the rear-attaching member has a temporary hanging portion on the upright connecting surface portion of the leading-edge member. Therefore, with the ceiling structure of the present invention, even if the height of the high ceiling section and low ceiling section that make up the ceiling of a building is changed, the change can be easily and quickly responded to on-site by adjusting the height in the vertical direction, etc., using the separated pre-attached and post-attached members. In addition, when attaching the retrofit member, the temporary hanging portion of the retrofit member is temporarily hung (temporarily placed) on the temporarily hung portion of the pre-attached member, and then the retrofit member is fixed to the pre-attached member, eliminating the need to support the retrofit member by hand. This prevents the installation work from becoming too burdensome even when the retrofit member is configured as a separate member. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing a configuration of a ceiling structure according to a first embodiment of the present invention. [Diagram 2]FIG. 2 is an enlarged partial cross-sectional view of a main portion in FIG. [Diagram 3] 1 is a perspective view showing a connection state between a front-attached member and a rear-attached member of an indirect lighting component employed in a ceiling structure of embodiment 1 according to the present invention. FIG. [Figure 4] 1A and 1B are a front view and an enlarged cross-sectional view of part A of an indirect lighting component employed in a ceiling structure according to a first embodiment of the present invention. [Diagram 5] 1A and 1B are a front view and an enlarged cross-sectional view of a portion B of an indirect lighting component employed in a ceiling structure according to a first embodiment of the present invention. [Figure 6] FIG. 2 is a diagram showing the state before indirect lighting components are attached to the ceiling structure of the first embodiment of the present invention. [Figure 7] 1A to 1C are diagrams showing the attachment of a pre-attached member in a ceiling structure according to a first embodiment of the present invention. [Figure 8] 5A to 5C are diagrams showing a procedure for temporarily hanging a post-attachment member on a pre-attachment member in the ceiling structure of the first embodiment of the present invention. [Figure 9] 1A and 1B are views showing a state in which a post-attachment member is temporarily hung on a pre-attachment member in a ceiling structure according to a first embodiment of the present invention, and an enlarged view of part C, respectively. [Figure 10] 1 is a diagram showing a state in which a spacer is installed after a post-attachment member is temporarily attached to a pre-attachment member in a ceiling structure according to a first embodiment of the present invention. FIG. [Figure 11] 1A and 1B are diagrams showing the state in which the height adjustment screw has been inserted after the post-attachment member has been temporarily attached to the pre-attachment member and the spacer has been installed in the ceiling structure of embodiment 1 of the present invention, and an enlarged view of part D. [Figure 12] 1 is a diagram showing a state in which a fastener is inserted after the height of an attachment member is adjusted by a height adjustment screw in the ceiling structure of the first embodiment of the present invention. FIG. [Figure 13] 1 is a diagram showing a state in which a fixing tool is inserted after the height of an attachment member is adjusted using a height adjustment screw in the ceiling structure of the first embodiment of the present invention. FIG. [Figure 14]FIG. 2 is a diagram showing a state in which ceiling gypsum boards (Pb) are attached to the high ceiling portion and the low ceiling portion of a folded-up ceiling after the post-attachment member is fixed to the pre-attachment member in the ceiling structure of the first embodiment of the present invention. [Figure 15] FIG. 2 is a diagram showing a state in which a decorative material is attached to an attachment member after a ceiling gypsum board (Pb) is attached to a high ceiling portion and a low ceiling portion of a folded-up ceiling in the ceiling structure of the first embodiment of the present invention. [Figure 16] FIG. 11 is a diagram showing a ceiling structure according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Below, the ceiling structure of the present invention according to the first and second embodiments will be described with reference to the drawings. Note that the ceiling structure of the first and second embodiments described below, including the values ​​of length, etc., are merely examples of the present invention, and the present invention is not limited to the first and second embodiments described below, and can be modified as appropriate within the scope of the technical idea of ​​the present invention.

[0011] Embodiment 1. The ceiling structure of embodiment 1 of the present invention is, as shown in Figure 1 etc., a folded-up (folded-down) ceiling 3 having a high ceiling section 31 and a low ceiling section 32 that is lower than the high ceiling section 31, and cove lighting is provided by a so-called cove-type indirect lighting component 1 that irradiates light from an LED lighting fixture 13 toward the high ceiling section 31.

[0012] <Configuration of the raised ceiling 3> As shown in Figure 1 etc., the raised ceiling 3 is a ceiling having a high ceiling section 31 and a low ceiling section 32 which is lower than the high ceiling section 31 as described above, and is constructed of a so-called light ceiling framed with lightweight steel framework or the like. The high ceiling section 31 is constructed by supporting a joist support 31c for the high ceiling section 31 with hanging bolts 31a and hangers 31b for the high ceiling section 31, and supporting two ceiling gypsum boards (Pb) 31f, 31f via clips (not shown) and joists 31e provided on the joist support 31c.

[0013] Similarly, the low ceiling section 32 is configured by supporting the joist support 32c for the low ceiling section 32 with the hanging bolt 32a and hanger 32b for the low ceiling section 32, and supporting two ceiling gypsum boards (Pb) 32f, 32f via a clip (not shown) provided on the joist support 32c and the joist 32e. Note that the number of ceiling gypsum boards (Pb) 31f, 31f and ceiling gypsum boards (Pb) 32f, 32f is merely an example, and there may be only one depending on the site.

[0014] <Configuration of indirect lighting component 1> The indirect lighting component 1 of the first embodiment is a cove-type indirect lighting component to be provided on the raised ceiling 3 constructed as described above, and as shown in Figures 1 to 3, etc., is composed of a pre-attached component 11, a post-attached component 12, an LED lighting device 13, joint plates 14a to 14d, height adjustment screws 15 such as flat head screws, text screws 16 and tapping screws 17 as fixing devices, and a decorative material 18. Note that Figure 3 shows a state in which the pre-attached components 11, 11 and the post-attached components 12, 12 are not connected to each other in the longitudinal direction, and the joint plates 14a to 14d are not shown.

[0015] (Pre-attached parts 11) As shown in Figures 1 and 4, the pre-attachment member 11 has a high ceiling fixing surface portion 11a that is fixed to the joist 31e for the high ceiling portion 31 by means of text screws 16 or the like, a hanging connecting surface portion 11b that extends from the end of the high ceiling fixing surface portion 11a toward the low ceiling portion 32 and is connected to the upper end of the post-attachment member 12, and a temporarily hanging portion 11c to which the temporary hanging portion 12a2 of the post-attachment member 12, which will be described later, is temporarily hung.

[0016] The high ceiling fixing surface portion 11a has a screw position indicating groove 11a1 on its underside which indicates the installation position of the tex screws 16, as shown in Figures 3 and 4, and also has a joint plate fitting portion 11a2 close to the hanging connecting surface portion 11b into which the upper end of the joint plate 14a fits.

[0017] The hanging connecting surface portion 11b is provided with a joint plate fitting portion 11b1 at a position close to the temporarily hung portion 11c on its lower end side, opposite the joint plate fitting portion 11a2 of the high ceiling fixing surface portion 11a, into which the lower end of the joint plate 14a fits, and the temporarily hung portion 11c is also provided at the lower end.

[0018] As shown in Figures 1 and 4, the temporary hanging portion 11c is formed in an approximately U-shape from an upper surface portion 11c1 that bends from the lower end of the hanging connecting surface portion 11b in a direction away from the wall of the building, i.e., toward the center of the room, a hanging surface portion 11c2 that bends downward from the tip of the upper surface portion 11c1, which is the right end portion of the figure, a lower surface portion 11c3 that bends from the lower end of the hanging surface portion 11c2 in a direction approaching the wall of the building and faces the upper surface portion 11c1, and an upright surface portion 11c4 that bends upward from the tip of the lower surface portion 11c3, which is the left end portion of the figure.

[0019] The hanging surface 11c2 of the temporary hanging portion 11c has a plurality of loose holes 11c21 with a vertical length L1 of, for example, about 20 mm and an adjustment allowance of ±10 mm in the vertical direction, so that the length can be adjusted in the vertical direction when connecting to the upright connecting surface 12a of the post-attaching member 12 described later. The loose holes 11c21 are provided in the longitudinal direction of the post-attaching member 12 with a hole pitch of, for example, about 600 mm, as shown in Figure 3, and are configured so that tapping screws 17 can be inserted to finally fix the pre-attaching member 11 and the post-attaching member 12 while adjusting their height in the vertical direction.

[0020] In addition, on the underside 11c3 of the temporarily hanging portion 11c, there are provided female threaded holes 11c31 into which height adjustment screws 15, the tips of which abut the underside of the fitting portion of the temporary hanging portion 12a2 as described below, are screwed at intervals of approximately 600 mm, the same as the hole pitch of the loose holes 11c21, and the mounting height of the post-attachment member 12 relative to the pre-attachment member 11 can be adjusted by rotating the height adjustment screws 15 screwed into the female threaded holes 11c31 as shown in Figure 3, etc.

[0021] (Retrofitting part 12) As shown in Figures 1 and 2, the retrofit member 12 has an upright connecting surface portion 12a that faces the temporarily hung portion 11c of the pre-attached member 11 and extends vertically so that its upper end abuts the lower end of the hanging connecting surface portion 11b of the pre-attached member 11, a lamp mounting surface portion 12b that extends horizontally from the lower end of the upright connecting surface portion 12a toward the wall of the building and on which the LED lamp 13 is mounted as shown in Figure 1, an L-shaped stepped-down portion 12c that drops vertically from the tip of the lamp mounting surface portion 12b and then extends horizontally toward the wall of the building, a fascia panel portion 12d that rises from the tip of the stepped-down portion 12c and stands up so that the LED lamp 13 and its direct light are not directly visible from inside the room as much as possible, and a hanging surface portion 12e that hangs down from the tip of the stepped-down portion 12c and is flush with the fascia panel portion 12d.

[0022] At the vertical middle of the upright connecting surface portion 12a, facing the temporarily hung portion 11c of the pre-attached member 11, there is provided a screw fixing portion 12a1 which is permanently fixed to the temporarily hung portion 11c by a tapping screw 17, and a temporary hanging portion 12a2 which is temporarily hung on the temporarily hung portion 11c of the pre-attached member 11.

[0023] As shown in Figures 1 and 2, the screw fixing portion 12a1 is formed in an L-shape rotated 90 degrees counterclockwise, and is composed of a horizontal screw fixing portion 12a11 extending toward the hanging surface portion 11c2 of the temporarily hung portion 11c, and a vertical screw fixing portion 12a12 which rises from the tip of the horizontal surface portion 12a11 facing closely to or in contact with the hanging surface portion 11c2 of the temporarily hung portion 11c, and into which the tapping screw 17 passed through the loose hole 11c21 of the hanging surface portion 11c2 of the temporarily hung portion 11c of the leading-attachment member 11 is screwed.

[0024] The vertical screw fixing portion 12a12 is formed to be 1.5 times thicker than the horizontal surface portion 12a11 so that the tapping screw 17 is screwed into the vertical screw fixing portion 12a12 to firmly fix the pre-attached member 11 and the post-attached member 12, and is formed with a pilot hole position indication groove 12a12a which indicates the position of a pilot hole into which the tip of the tapping screw 17 inserted into the loose hole 11c21 of the temporarily hung portion 11c is inserted. The pilot hole is pre-drilled at the factory based on the pilot hole position indication groove 12a12a. The pilot hole may be a female screw hole into which the tapping screw 17 is screwed.

[0025] The temporary hanging portion 12a2 is formed in an L-shape by a hanging surface portion 12a21 which hangs down from a point on the underside of the horizontal screw fixing portion 12a11 of the screw fixing portion 12a1, which is away from the inner surface of the upright connecting surface portion 12a by the thickness of the upright surface portion 11c4 of the temporarily hanging portion 11c, and a horizontal surface portion 12a22 which extends from the lower end of the hanging surface portion 12a21 toward the hanging surface portion 11c2 of the temporarily hanging portion 11c.

[0026] Therefore, when the temporary hanging portion 12a2 is temporarily hung on the temporarily hung portion 11c, as shown in Figures 1 and 2, the temporary hanging portion 12a2 fits into the space surrounded by the hanging surface portion 11c2, the bottom surface portion 11c3, and the standing surface portion 11c4 of the temporarily hung portion 11c, so that the post-attachment member 12 can be temporarily hung (temporarily placed) on the pre-attachment member 11, and the vertical screw fixing portion 12a12 abuts against the hanging surface portion 11c2 of the temporarily hung portion 11c, and the upper end portion of the standing connecting surface portion 12a abuts against the hanging connecting surface portion 11b.

[0027] As a result, when the post-attaching member 12 is temporarily hung on the temporarily hung portion 11c of the pre-attaching member 11 by the temporary hanging portion 12a2, the vertical screw fixing portion 12a12 and the upper end of the standing connecting surface portion 12a abut against the pre-attaching member 11, so the post-attaching member 12 can be temporarily hung in a stable state and can be easily fixed. Furthermore, the temporarily hung portion 11c of the pre-attaching member 11 also abuts against the standing connecting surface portion 12a of the post-attaching member 12, so the temporarily hung state is further stabilized and the fixed state is also stabilized.

[0028] 1, the LED lighting fixture 13 is installed on the upper surface of the lighting fixture installation surface portion 12b, and the lighting fixture installation surface portion 12b is installed on the joist 32e of the low ceiling portion 32 via a spacer 32g, and the center of the lower surface is provided with a joint plate fitting portion 12b1 having a shape that is an inverted, line-symmetrical L-shape into which the right end portion of the joint plate 14b fits, which is provided to prevent gaps from occurring between the lighting fixture installation surface portions 12b when connecting the retrofit member 12 in the longitudinal direction. The joint plate fitting portion 12b1 protrudes downward from the center of the lower surface of the lighting fixture installation surface portion 12b, and therefore also has a positioning function for the spacer 32g, as shown in Figs. 1 and 2.

[0029] In addition, the lamp mounting surface 12b is provided with circular heat escape / wiring holes 12b2 at appropriate intervals, for example, as shown in Fig. 3, in order to allow wiring to the LED lamp 13 provided on the lamp mounting surface 12b and to release heat. Note that, as shown in Fig. 3, the heat escape / wiring holes 12b2 are also provided at a hole pitch similar to the intervals at which the loose holes 11c21 and the female screw holes 11c31 are provided, for example, at intervals of about 600 mm in the longitudinal direction of the retrofit member 12.

[0030] The step-down portion 12c is configured so that, on the surface that drops vertically from the tip of the lamp mounting surface portion 12b, a joint plate fitting portion 12c1 is provided opposite the joint plate fitting portion 12b1 at the center of the underside of the lamp mounting surface portion 12b, and both ends of the joint plate 14b are sandwiched between the joint plate fitting portion 12b1 and the joint plate fitting portion 12b1, and, after dropping vertically from the tip of the lamp mounting surface portion 12b, the upper surface of the horizontal plane portion that extends horizontally toward the wall of the building to the intersection of the lower end of the fascia portion 12d and the upper end of the hanging surface portion 12e is provided with a joint plate fitting portion 12c2 for sandwiching the joint plate 14c between the fascia portion 12d1 (described later) of the fascia portion 12d.

[0031] The valance portion 12d is provided to prevent light leakage from the LED lighting fixture 13, and is formed to extend vertically opposite the upright connecting surface portion 12a at the tip of the step-down portion 12c, and is provided at the upper end with a joint plate fitting portion 12d1 for clamping the joint plate 14c between it and the joint plate fitting portion 12c2 of the step-down portion 12c.

[0032] The hanging surface portion 12e is configured to hang down from the tip of the stepped-down portion 12c, and at its lower end is provided with a plaster board end supporting protrusion 12e1 which protrudes slightly toward the lighting fixture installation surface portion 12b and overlaps with the tip of the lower ceiling plaster board (Pb) 32f which constitutes the low ceiling portion 32 as shown in Figure 1, as well as a joint plate fitting portion 12e2 which sandwiches the lower end of the joint plate 14a, and a joint plate fitting portion 12e3 which sandwiches the upper end of the joint plate 14a.

[0033] (LED light fixture 13) The LED lighting fixture 13 is a well-known LED lighting fixture having a diffusion lens (including a diffusion cover and diffusion material) 13c on the top of an LED lighting fixture main body 13b which has an LED circuit board 13a having an LED (not shown) built in as shown in FIG. 2, and which diffuses the light emitted from the LED (not shown), and is fixed to the upper surface of the lighting fixture mounting surface 12b with double-sided tape, adhesive, etc.

[0034] Incidentally, the electric wire (not shown) that supplies current to the LED lighting fixture 13 is wired through the heat escape and wiring hole 12b2 provided on the lighting fixture installation surface portion 12b of the retrofit member 12 as described above. Also, the LED lighting fixture 13 is not particularly limited, and may be a dot-type LED lighting fixture in which a plurality of LED circuit boards 13a are provided at predetermined intervals in the longitudinal direction of the LED lighting fixture 13, or may be a long LED circuit board 13a, or may be an LED tube light or an LED fluorescent tube in which the LED lighting fixture main body 13b and the diffusion lens 13c are formed of silicone resin or the like.

[0035] (Joint plates 14a to 14d) The joint plates 14a to 14d are members that connect the pre-attached members 11, 11 together or the post-attached members 12, 12 together. The length in the longitudinal direction of one pre-attached member 11 and post-attached member 12 is, for example, about 1.8 m, which is convenient for work and transportation, and if a longer length is required, the joint plates 14a to 14d, which are joint materials, are fitted between the joint plate fitting parts 11a2, 11b1 of the pre-attached member 11, or the joint plate fitting parts 12b1, 12c1, 12c2, 12d1, 12e2, 12e3 of the post-attached member 12, as shown in FIG. 1, etc., to join the pre-attached members 11, 11 together or the post-attached members 12, 12 together to lengthen the length and prevent misalignment of the connecting parts between the pre-attached members 11, 11 together or the post-attached members 12, 12 together. Incidentally, FIG. 3 shows a state in which the rear-attaching member 12 is fixed to the front-attaching member, but the joint plates 14a to 14d are not shown because the front-attaching members 11, 11 or the rear-attaching members 12, 12 are not connected to each other.

[0036] (Height adjustment screw 15) The height adjustment screw 15 is inserted upward through the female threaded hole 11c31 provided on the underside 11c3 of the temporarily hung portion 11c of the pre-attached member 11 as shown in Figure 2 and rotated so that its tip comes into contact with the underside of the horizontal surface portion 12a22 of the temporary hanging portion 12a2 of the post-attached member 12 to fine-tune the mounting height of the post-attached member 12 relative to the pre-attached member 11. Unlike the text screw 16, the tip of the screw 15 is formed into a flat or curved shape so as to push up the horizontal surface portion 12a22 of the temporary hanging portion 12a2, and a normal flat head screw, tapping screw, etc. is used.

[0037] (Texbis 16) The tex screws 16 are fasteners that fasten the pre-attached member 11 to the rafters 31e of the high ceiling 31 and the post-attached member 12 to the pre-attached member 11, and are also called drill screws because they have a threaded portion formed on the outer periphery and a sharp tip that drills a hole by rotating itself even if there is no female screw hole. Note that the tex screws 16 can also be nails or the like, as long as they can fasten the pre-attached member 11 to the rafters 31e of the high ceiling 31.

[0038] (Tapping screw 17) The tapping screw 17 is inserted through the loose hole 11c21 of the temporarily hung portion 11c of the prior-attachment member 11, and pushes open a pilot hole drilled at the factory in the vertical screw fixing portion 12a12 of the screw fixing portion 12a1 of the post-attachment member 12, thereby fixing the temporarily hung portion 11c of the prior-attachment member 11 and the screw fixing portion 12a1 of the post-attachment member 12 together.

[0039] As is clear from Figures 1 and 2, the text screws 16 and the tapping screws 17 are fixed to the high ceiling fixing surface portion 11a of the pre-attachment member 11 and the screw fixing portion 12a1 of the post-attachment member 12, respectively, and are not fixed above the lamp mounting surface portion 12b of the post-attachment member 12. This results in a structure in which cutting chips and the like generated when screwed in do not fall onto the upper surface of the lamp mounting surface portion 12b, which is advantageous in that it is not necessary to clean off cutting chips and the like from the upper surface of the lamp mounting surface portion 12b.

[0040] (Decorative Materials 18) The decorative material 18 is a component that is formed to be longer than the longitudinal length of the pre-attached component 11 and the post-attached component 12 to improve the design, but is not essential to the present invention and may be omitted.

[0041] <How to attach the indirect lighting component 1 to the raised ceiling 3> Next, a method for attaching the indirect lighting component 1 divided and constructed as described above to the raised ceiling 3 will be briefly described with reference to the drawings.

[0042] Figure 6 shows the state of the folded ceiling 3 before the indirect lighting component 1 is installed, in which a sash support 31c is attached to the hanging bolt 31a for the high ceiling portion 31 via a hanger 31b, and a sash support 31e is attached to the sash support 31c via a clip (not shown) or the like to form the high ceiling portion 31 excluding the ceiling plasterboards (Pb) 31f, 31f (see Figure 1), and a sash support 32c is attached to the hanging bolt 32a for the low ceiling portion 32 via a hanger 32b, and a sash support 32e is attached to the sash support 32c via a clip (not shown) or the like to form the low ceiling portion 32 excluding the ceiling plasterboards (Pb) 32f, 32f (see Figure 1).

[0043] For the folded ceiling 3 configured as shown in Fig. 6, the worker first fixes the pre-attached member 11 to the rafter 31e of the high ceiling portion 31 by rotating the tex screws 16 according to the screw position indication groove 11a1 of the high ceiling fixing surface portion 11a of the pre-attached member 11, as shown in Fig. 7. However, it is of course acceptable for a pilot hole to be drilled in the screw position indication groove 11a1 at the factory or the like.

[0044] After the pre-attachment member 11 is fixed to the rafter 31e of the high ceiling member 31 with the tex screws 16 as shown in Figure 7, the worker then picks up the post-attachment member 12 and moves the screw fixing portion 12a1 and the temporary hanging portion 12a2 of the post-attachment member 12 to the temporarily hung portion 11c of the pre-attachment member 11 as shown in Figure 8. When the screw fixing portion 12a1 and the temporary hanging portion 12a2 of the post-attachment member 12 abut or come into close proximity to the temporarily hung portion 11c of the pre-attachment member 11, the worker lowers the post-attachment member 12 and temporarily hangs, i.e., temporarily places, the temporary hanging portion 12a2 of the post-attachment member 12 on the temporarily hung portion 11c of the pre-attachment member 11 as shown in Figure 9.

[0045] As a result, even if the indirect lighting component 1 is divided into a pre-attached component 11 and a post-attached component 12, when fixing the post-attached component 12 to the pre-attached component 11, the worker does not need to support the post-attached component 12 by temporarily hanging the post-attached component 12 on the pre-attached component 11, and can release the post-attached component 12 to perform other work or the next work, thereby preventing the burden of the installation work of the indirect lighting component 1 from becoming too great.

[0046] Here, when the rear-mounting member 12 is temporarily attached to the front-mounting member 11 as shown in Figure 9, in most cases a space S will be left between the underside of the lamp mounting surface portion 12b of the rear-mounting member 12 and the upper surface of the joist 32e of the low ceiling portion 32. Therefore, the worker then inserts a spacer 32g such as a piece of wood or urethane into the space S between the underside of the lamp mounting surface portion 12b of the rear-mounting member 12 and the upper surface of the joist 32e of the low ceiling portion 32 as shown in Figure 10.

[0047] Furthermore, even if a spacer 32g is inserted into the space S between the underside of the lamp mounting surface portion 12b of the retrofitting member 12 and the upper surface of the rafter 32e of the low ceiling portion 32, the height of the space S between the underside of the lamp mounting surface portion 12b of the retrofitting member 12 and the upper surface of the rafter 32e of the low ceiling portion 32 is often not constant due to warping in the longitudinal direction, that is, the depth direction, of the rafter 31e of the high ceiling portion 31 and the rafter 32e of the low ceiling portion 32, and therefore a step is likely to occur at the joint between the upper surfaces of the lamp mounting surface portions 12b of the retrofitting members 12 that are connected in the longitudinal direction.

[0048] Therefore, as shown in FIG. 11, a height adjustment screw 15 is passed through a female screw hole 11c31 provided on the underside 11c3 of the temporarily hung portion 11c of the prior-attachment member 11 and rotated, so that the tip of the height adjustment screw 15 abuts against the underside of the horizontal surface portion 12a22 of the temporary hanging portion 12a2 of the post-attachment member 12, thereby fine-tuning the mounting height of the post-attachment member 12 relative to the prior-attachment member 11.

[0049] As a result, even if the height of the space S between the underside of the lamp mounting surface portion 12b of the rear-mounting member 12 and the upper surface of the sill 32e of the low ceiling portion 32 is not constant due to warping in the longitudinal direction, i.e. the depth direction, of the sill 31e of the high ceiling portion 31 or the sill 32e of the low ceiling portion 32, and a step occurs at the joint between the upper surfaces of the lamp mounting surface portions 12b of the connected rear-mounting members 12, the step or the like that occurs at the joint between the upper surfaces of the lamp mounting surface portions 12b of the connected rear-mounting members 12 can be eliminated by adjusting the installation height of the rear-mounting member 12 relative to the pre-attachment member 11 using the height adjustment screw 15, and fine adjustments can be made using the height adjustment screw 15, so that the step or the like that occurs at the joint can be reliably eliminated and the finish and design of the joint portion can be further improved.

[0050] By adjusting the mounting height of the post-attachment member 12 relative to the pre-attachment member 11 using the height adjustment screw 15, it is possible to eliminate any steps or the like that occur at the joint between the upper surfaces of the lamp mounting surface portions 12b of the post-attachment member 12. As shown in Figure 12, a tapping screw 17 is passed through the loose hole 11c21 provided in the hanging surface portion 11c2 of the temporarily hung portion 11c of the pre-attachment member 11, and the post-attachment member 12 that is temporarily hung on the pre-attachment member 11 is finally fixed with the tapping screw 17 as shown in Figure 13.

[0051] Furthermore, after the rear-attaching member 12 is temporarily attached to the prior-attaching member 11, before or after the insertion of the spacer 32g, the rear-attaching member 12 may be temporarily fixed to the prior-attaching member 11 by passing a tapping screw 17 through a loose hole 11c21 provided in the hanging surface portion 11c2 of the temporarily attached portion 11c of the prior-attaching member 11 and temporarily tightening it to the temporarily attached rear-attaching member 12, and then, as shown in Figure 11, the height adjustment screw 15 is passed through the female threaded hole 11c31 of the temporarily hung portion 11c to fine-tune the installation height of the rear-attaching member 12, and then the temporarily fixed tapping screw 17 is finally tightened to permanently fix it.

[0052] Here, the loose hole 11c21 of the hanging surface portion 11c2 has a vertical length L1 of, for example, about 20 mm and an adjustment allowance of ±10 mm in the vertical direction, so that even if the distance between the high ceiling portion 31 and the low ceiling portion 32 changes by about ±10 mm, the change can be absorbed by the loose hole 11c21 and the indirect lighting component 1 can be attached.

[0053] Furthermore, since the vertical length L1 of the loose hole 11c21 is approximately 20 mm, not only when the distance between the high ceiling section 31 and the low ceiling section 32 changes, but also by effectively utilizing the vertical length L1 of the loose hole 11c21 to move the lighting fixture installation surface section 12b of the retrofitting member 12 on which the LED lighting fixture 13 is installed closer to or farther away from the ceiling gypsum board (Pb) 31f of the high ceiling section 11, the brightness of the cove lighting can be actively changed without directly adjusting the brightness of the LED lighting fixture 13.

[0054] Then, once the post-attachment member 12 has been fixed to the pre-attachment member 11 using the tapping screws 17, the worker then fixes two ceiling gypsum boards (Pb) 31f, 31f and two ceiling gypsum boards (Pb) 32f, 32f to the underside of the joist 31e of the high ceiling portion 31 and the joist 32e of the low ceiling portion 32, as shown in Figure 14, and installs the LED lighting fixture 13 on the upper surface of the lighting fixture installation surface portion 12b of the post-attachment member 12.

[0055] Here, in this indirect lighting component 1, the LED lighting fixture 13 is installed on the indoor side so that it is in contact with the upright connecting surface 12a as much as possible on the upper surface of the lighting fixture installation surface 12b. Since the light from the LED lighting fixture 13 is diffused by its diffusion lens 13c and emitted at a wide angle, part of the light heading toward the ceiling gypsum board (Pb) 31f of the high ceiling part 31 is blocked by the joint plate fitting part 12d1 (see FIG. 5) at the upper end of the fascia board 12d. In other words, the joint plate fitting part 12d1 at the upper end of the fascia board 12d becomes the cutoff line of the LED light. This phenomenon occurs whether the LED lighting fixture 13 is installed on the fascia board 12d side, which is the left side in the figure of the lighting fixture installation surface 12b, or on the upright connecting surface 12a side, which is the right side in the figure. However, the light from the LED lighting fixture 13 passing through the upper end of the fascia board 12d toward the ceiling plaster board (Pb) 31f of the high ceiling portion 31 becomes more intense as the LED lighting fixture 13 is installed closer to the fascia board 12d, which is the left side in the drawing of the lighting fixture installation surface portion 12b, because the distance to the ceiling plaster board (Pb) 31f becomes shorter. This makes it easier for a line dividing the light into light and dark to appear on the surface of the ceiling plaster board (Pb) 31f, which is an extension of the cut-off line, and thus impedes the design.

[0056] In contrast, when the LED lighting fixture 13 is installed on the upright connecting surface portion 12a side, which is the right side of the drawing, as in this indirect lighting component 1, the distance from the LED lighting fixture 13 to the upper end of the fascia board 12d, which is the cut-off line, becomes longer, and the distance from the upper end of the fascia board 12d to the ceiling gypsum board (Pb) 31f also becomes longer, so that the light from the LED lighting fixture 13 is attenuated more until it is blocked by the upper end of the fascia board 12d, and even after passing through the upper end of the fascia board 12d, the light is further attenuated on the way to the ceiling gypsum board (Pb) 31f or blends into the distribution of light on the surface of the ceiling gypsum board (Pb) 31f, making it difficult for a line separating light and dark to appear, thereby improving the design of the light irradiated to the ceiling gypsum board (Pb) 31f.

[0057] Furthermore, when attaching the ceiling gypsum boards (Pb) 32f, 32f to the underside of the rough joist 32e of the low ceiling portion 32, the ceiling gypsum boards (Pb) 32f, 32f can be easily attached because the lower end of the hanging surface portion 12e of the retrofitting member 12 has a protrusion 12e1 for supporting the end of the gypsum board.

[0058] In the ceiling structure of embodiment 1, in order to make the seams and dents between the fascia portion 12d and the hanging surface portion 12e of the retrofitting member 12 less visible from the outside, a decorative material 18 that is longer than the retrofitting member 12 is attached to the front side of the fascia portion 12d and the hanging surface portion 12e of the retrofitting member 12 as shown in Figure 15, and the final finish can be achieved as shown in Figure 1.

[0059] By providing the decorative material 18 in this manner so as to hide the skirting board portion 12d and the hanging surface portion 12e of the retrofitting member 12, even if scratches or dents occur on the outer surfaces of the skirting board portion 12d and the hanging surface portion 12e of the retrofitting member 12, these can be hidden by the decorative material 18. Therefore, by hiding the outer sides of the skirting board portion 12d and the hanging surface portion 12e, which are easily visible from below, with the decorative material 18, the design can be improved, and the design can also be improved in that the decorative board 18 can be appropriately selected to suit the user's preferred type and design.

[0060] <Summary of the ceiling structure of embodiment 1> As described above, in the ceiling structure of embodiment 1 of the present invention, the indirect lighting component 1 is divided into a leading-edge member 11 which is attached to the high ceiling portion 31 and has a hanging connecting surface portion 11b which descends toward the low ceiling portion 32, and a rear-attaching member 12 which is fixed to the leading-edge member 11 and which extends toward the lamp installation surface portion 12b on which the lamp 13 is installed and the high ceiling portion 31, with its upper end portion extending higher than the lower end portion of the hanging connecting surface portion 11b of the leading-attaching member 11 and having an upright connecting surface portion 12a which overlaps with the hanging connecting surface portion 11b of the leading-attaching member 11. The hanging connecting surface portion 11b of the leading-attaching member 11 is provided with a temporary hanging portion 11c, while the upright connecting surface portion 12a is provided with a temporary hanging portion 12a2 which is temporarily hung on the temporary hanging portion 11c of the leading-attaching member 11.

[0061] Therefore, according to the ceiling structure of embodiment 1 of the present invention, even if the height of the high ceiling portion 31 and the low ceiling portion 32 are changed, the change can be easily and quickly responded to on-site by adjusting the divided pre-attachment member 11 and post-attachment member 12 in the vertical direction, etc., and when attaching the post-attachment member 12 to the pre-attachment member 11, the temporary hanging portion 12a1 of the post-attachment member 12 can be temporarily hung (temporarily placed) on the temporarily hung portion 11c of the pre-attachment member 11, and then the post-attachment member 12 can be fixed to the pre-attachment member 11. Therefore, even if the number of parts is increased by dividing the indirect lighting component 1 into the pre-attachment member 11 and the post-attachment member 12, the burden of the installation work can be prevented from becoming too great.

[0062] Furthermore, in the ceiling structure of embodiment 1 of the present invention, a female screw hole 11c31 that penetrates in the vertical direction is provided on the underside 11c3 of the temporarily hanging portion 11c, and a height adjustment screw 15 whose tip abuts against the underside of the horizontal surface portion 12a22 of the temporarily hanging portion 12a2 is screwed into this female screw hole 11c31, so that the installation height of the post-attachment member 12 relative to the pre-attachment member 11 can be fine-tuned by rotating the height adjustment screw 15.

[0063] As a result, according to the ceiling structure of embodiment 1 of the present invention, even if the height of the space S between the underside of the lamp mounting surface portion 12b of the rear-mounting member 12 and the upper surface of the sill 32e of the low ceiling portion 32 is not constant due to warping in the longitudinal direction, i.e. the depth direction, of the sill 31e of the high ceiling portion 31 or the sill 32e of the low ceiling portion 32, and a step occurs at the joint between the upper surfaces of the lamp mounting surface portions 12b of the connected rear-mounting members 12, by fine-tuning the installation height of the rear-mounting member 12 relative to the pre-attachment member 11 using the height adjustment screw 15, it is possible to reliably eliminate the step that occurs at the joint between the upper surfaces of the lamp mounting surface portions 12b of the connected rear-mounting members 12, thereby further improving the finish and design of the joint portion.

[0064] Furthermore, in the ceiling structure of embodiment 1 of the present invention, the temporarily hung portion 11c of the pre-attached member 11 has at least an upper surface portion 11c1 formed by being recessed from the lower end of the hanging connecting surface portion 11b of the pre-attached member 11 so that the opening end faces the wall of the building, a hanging surface portion 11c2 which bends downward and extends from the right end portion in the figure, which is the tip of the upper surface portion 11c1, and a lower surface portion 11c3 which bends from the lower end of the hanging surface portion 11c2 in a direction approaching the wall of the building and faces the upper surface portion 11c1, and the hanging surface portion 11c2 is provided with a long loose hole 11c21 having a vertical length L1 of, for example, about 20 mm, while the post-attached member 12 is provided with a screw fixing portion 12a1 which is fixed with a tapping screw 17 passed through the loose hole 11c21, and the installation height of the post-attached member 12 relative to the pre-attached member 11 can be changed and the post-attached member 12 can be fixed by changing the height of the tapping screw 17 passed through the loose hole 11c21.

[0065] Therefore, even if the distance between the high ceiling section 31 and the low ceiling section 32 changes by about ±10 mm, the change can be absorbed by the loose hole 11c21, making it possible to easily and reliably respond on-site.In addition, the brightness of the cove lighting can be actively changed without directly adjusting the brightness of the LED lighting fixture 13 by effectively utilizing the vertical length L1 of the loose hole 11c21 by moving the lighting fixture installation surface portion 12b of the retrofitting component 12 on which the LED lighting fixture 13 is installed closer to or farther away from the ceiling gypsum board (Pb) 31f of the high ceiling section 11.In this respect, too, it is possible to easily respond to on-site needs.

[0066] Embodiment 2. In the ceiling structure of the above embodiment 1, cove lighting is configured using an indirect lighting component 1 having an attachment part 12 with a fascia portion 12d as shown in Figure 1 etc. However, in embodiment 2, cornice lighting is configured using an indirect lighting component 1' that does not have a fascia portion in an attachment part 12' on which an LED lighting fixture 13 is installed as shown in Figure 16, for example.

[0067] In the ceiling structure of embodiment 2, the indirect lighting component 1' is divided into a pre-attached member 11' and a post-attached member 12' which omits the fascia portion, and each of the pre-attached member 11' and the post-attached member 12' is provided with a temporarily hung portion 112c' and a temporary hanging portion 12a1' similar to the temporary hanging portion 11c and the temporary hanging portion 12a1 of the indirect lighting component 1 of embodiment 1.

[0068] In addition, in the indirect lighting component 1' of the ceiling structure of embodiment 2 shown in Figure 16, the front-attaching member 11' is further divided into two members, a first front-attaching member 111' and a second front-attaching member 112', and the temporary hanging portion 112c' is provided on the second front-attaching member 112'.

[0069] As a result, the rear-attachment member 12' can be temporarily hung on the temporary hanging portion 112c' of the second pre-attachment member 112' of the pre-attachment member 11' previously attached to the high ceiling portion 31, and then post-attachment work can be carried out, including the actual fixing work using the tapping screw 17.As with the indirect lighting component member 1 of the ceiling structure of embodiment 1 described above, even if the indirect lighting component member 1' other than the LED lamp 13 is configured separately, it is possible to prevent the burden of the installation work from becoming too great, and an effect similar to that of the ceiling structure of embodiment 1 can be obtained.

[0070] In addition, in the indirect lighting component 1' of the ceiling structure of embodiment 2 shown in Figure 16, the pre-attachment member 11' is further divided to consist of two members, a first pre-attachment member 111' and a second pre-attachment member 112', and the first pre-attachment member 111' is provided with first and second L-shaped hooked portions 111a' and 111b' on the underside with a predetermined gap between them and opening toward the center of the room, as well as joint plate fitting portions 111c', 111d' for fitting into joint plate 14a1', and is pre-fixed to the high ceiling portion 31 with a tex screw 16a' or the like. The second pre-attachment member 112' has first and second hooked portions 112a' and 112b' which are inverted L-shaped and open on the wall 5 side with a predetermined distance between them on the underside, as well as joint plate fitting portions 112c', 112d' for fitting with the joint plate 14a2'. The first pre-attachment member 111' is previously attached to the high ceiling portion 31, and the first and second hooked portions 112a' and 112b' of the second pre-attachment member 112' are respectively hooked to the first and second hooked portions 111a' and 111b' of the first pre-attachment member 111' for temporary attachment. After that, the second pre-attachment member 112' together with the first pre-attachment member 111' are finally fixed to the joist 31e of the high ceiling portion 31 with tapping screws 17.

[0071] As a result, even if the pre-attachment member 11' in the ceiling structure of embodiment 2 shown in Figure 16 is further divided into two members, a first pre-attachment member 111' and a second pre-attachment member 112', the second pre-attachment member 112' can be temporarily attached to the first pre-attachment member 111' and then finally fixed together with the first pre-attachment member 111' to the sill 31e of the high ceiling section 31 with the tex screws 16, making it easier to attach the second pre-attachment member 112' to the first pre-attachment member 111' and improving workability.

[0072] In particular, when the second pre-attachment member 112' is hung as close as possible to the wall surface 5 inside the room relative to the first pre-attachment member 111' as shown in Figure 16, if the longitudinal length of the rough edge 32e of the ceiling gypsum boards (Pb) 32f, 32f in the low ceiling section 32 is short and the tips of the ceiling gypsum boards (Pb) 32f, 32f cannot be supported by the gypsum board end support protrusion 12e1' and a gap is likely to be created between them, the second pre-attachment member 112' can be attached by shifting it toward the center of the room relative to the first pre-attachment member 111', which also makes it possible to easily and quickly respond on site, preventing the burden of the installation work of the indirect lighting component 1' from becoming too great while allowing the function of slit lighting to be exhibited.

[0073] Furthermore, in the indirect lighting component 1' for the ceiling structure of embodiment 2, when the first hooked portion 111a' and the second hooked portion 111b' of the first pre-attaching member 111' are hooked to the first hooked portion 112a' and the second hooking portion 22c of the second pre-attaching member 112', the tip of the first pre-attaching member 111' is configured to protrude further toward the wall surface 5 inside the room than the tip of the second pre-attaching member 112'.Therefore, when the tip of the first pre-attaching member 111' is attached to the high ceiling portion 31 so as to abut or be close to the wall plaster board (Pb) 51 on the wall surface 5 inside the room as shown in Figure 16, a gap (gap) G of approximately 5 mm to 10 mm is left between the tip of the second pre-attaching member 112' and the wall surface 5 inside the room.

[0074] However, a slit-shaped shadow is formed by the light from the LED light 13 in the gap G between the tip of the second pre-attached member 112' and the wall surface gypsum board (Pb) 51 of the wall surface 5 inside the room, so that by attaching the second pre-attached member 112' closer to the wall 5 than the first pre-attached member 111' as shown in Figure 16, a gap G of about 5 mm is created and the pilot hole position indication groove of the first pre-attached member 111' and the pilot hole position of the second pre-attached member 112' are aligned. On the other hand, even if the second pre-attached member 112' is attached shifted toward the center of the room compared to the first pre-attached member 111' and the gap G widens to about 10 mm, the slit-shaped shadow makes the gap G difficult to notice for people below, so that not only can it be easily dealt with on-site, but the finish of the folded ceiling 3 can also be improved.

[0075] In addition, the gap (gap) G between the tip of the second pre-attached member 112' and the wall surface 5 inside the room is narrow as shown in FIG. 16, and a slit-shaped (linear) shadow is formed by the LED light emitted from the LED lighting device 13 installed diagonally downward toward the center of the room below the gap (gap) G. Therefore, even if a gap is formed between the tip of the first pre-attached member 111' and the wall surface plasterboard (Pb) 51 due to bending of the wall surface 5, etc., the slit-shaped (linear) shadow formed between the tip of the pre-attached member 11' of the second pre-attached member 112' and the wall surface plasterboard (Pb) 51 makes it difficult for people below to see, making it difficult to notice unevenness, and in this respect too, the design can be improved.

[0076] In the indirect lighting component 1' for the ceiling structure of embodiment 2, the first pre-attached member 111' is provided with an L-shaped first hooked portion 111a' and a second hooked portion 111b', while the second pre-attached member 112' is provided with an inverted L-shaped first hooked portion 112a' and a second hooked portion 112b' which hook onto the L-shaped first hooked portion 111a' and the second hooked portion 111b' of the first pre-attached member 111', respectively. However, the present invention is not limited to this, and any relationship such as fitting, locking, engagement or even concave / convex may be used, and there is no particular restriction as long as the shape (relationship) allows the second pre-attached member 112' to be temporarily hooked or temporarily fastened to the first pre-attached member 111'.

[0077] In addition, in the ceiling structures of the above embodiments 1 and 2, cove lighting or cornice lighting is constructed by installing LED lighting fixtures 13 on the indirect lighting components 1 and 1', respectively. However, in the present invention, it is of course also possible to use a folded-up (folded-down) ceiling structure that does not install lighting fixtures such as LED lighting fixtures 13 on the indirect lighting components 1 and 1' and simply has a high ceiling section 31 and a low ceiling section 32 without providing indirect lighting. [Explanation of symbols]

[0078] 1,1' Indirect lighting components 11,11' Pre-attached parts 111' First pre-attached part 112' Second pre-attached part 11a High ceiling fixed surface part 11a1 Screw position indication groove 11a2 Joint plate fitting part 11b Hanging connection surface 11b1 Joint plate fitting part 11c, 112c' Temporary hanging part 11c1 Top part 11c2 Drooping surface part 11c21 Loose hole 11c3 Bottom part 11c31 female screw hole 11c4 Upright surface section 12,12' Retrofitting parts 12a,12a' Standing connection surface part 12a1,12a1' Screw fixing part 12a11 Horizontal screw fixing part 12a12 Vertical screw fixing part 12a12a Pilot hole position indication groove 12a2,12a2' Temporary hanging part 12a21 Drooping surface part 12a22 Horizontal part 12b,12b' Light installation surface 12b1 Joint plate fitting 12b2 Heat escape and wiring hole 12c Lowering section 12c1 Joint plate fitting 12c2 Joint plate fitting 12d Skirt board 12d 12d1 Joint plate fitting 12e,12e' Drooping surface part 12e1 Gypsum board end support protrusion 12e2, 12e3 Joint plate fitting 13 LED lights 13a LED circuit board 13b LED light fixture body 13c Diffusion Lens 14a~14d,14a1',14a2',14b',14d' Joint plate 15 Height adjustment screw 16,17,16a',16b' Textvis 18 Cosmetic materials 3. Folding ceiling 31 High ceiling 32 Low ceiling section 31a Hanging bolt 31b Hanger 31c Rough edge 31e Wild Edge 31f Ceiling gypsum board (Pb) 32 Low ceiling section 32a Hanging bolt 32b Hanger 32c Rough edge 32e Noen 32f Ceiling gypsum board (Pb) 32g spacer 5. Interior walls 51 Wall plasterboard (Pb)

Claims

1. A ceiling structure having a high ceiling portion and a low ceiling portion disposed at a lower position than the high ceiling portion, A leading member is attached to the high ceiling portion and has a hanging connecting surface portion that descends toward the low ceiling portion; a rear-attaching member that rises toward the high ceiling portion, extends until an upper end portion thereof is higher than a lower end portion of the hanging connecting surface portion of the leading-attaching member, has an upright connecting surface portion that overlaps with the hanging connecting surface portion of the leading-attaching member, and is fixed to the leading-attaching member; A ceiling structure characterized in that a temporary hanging portion is provided on the hanging connection surface portion of the pre-attaching member, while a temporary hanging portion that is temporarily hung on the temporary hanging portion is provided on the upright connection surface portion of the post-attaching member.

2. The ceiling structure according to claim 1, A ceiling structure characterized in that the temporarily hung portion of the pre-attached member has a female threaded hole penetrating in the vertical direction, and a height adjustment screw whose tip abuts against the underside of the temporarily hung portion temporarily hung on the temporarily hung portion is screwed into the female threaded hole, and the installation height of the post-attached member relative to the pre-attached member can be adjusted by rotating the height adjustment screw.

3. In the ceiling structure according to claim 1 or 2, The temporarily attached portion of the leading member has at least an upper surface, a hanging surface, and a lower surface by being recessed from the lower end of the hanging connection surface of the leading member so that the wall side of the building becomes an opening end, and the hanging surface is provided with a loose hole that is long in the vertical direction, The retrofit member is provided with a fixing portion that is fixed by a fixing tool such as a screw or a bolt that is passed through the loose hole, A ceiling structure characterized in that the installation height of the post-attachment member relative to the pre-attachment member can be changed and fixed by changing the height of the fastener that is passed through the loose hole.

4. In the ceiling structure according to any one of claims 1 to 3, A ceiling structure, characterized in that the retrofit member is provided with a lamp mounting surface on which a lamp is mounted.

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