Ceiling panels and mounting structures for ceiling panels

Abstract

To provide ceiling panels and mounting structures for ceiling panels that enhance rigidity. [Solution] The ceiling panel 3 is attached to one of the lattices surrounded by beams arranged in a grid pattern on the ceiling, and is a rectangular plate material having a pair of rising parts 4, 4 formed by bending a pair of opposing one-sided ends in one direction of the rectangle, and a pair of opposing other-sided ends in the other direction, and connecting members 5, 5 arranged on each of the pair of other-sided ends to connect the pair of rising parts 4, 4 together, and locking parts 8, 12 to lock the ceiling panel 3 to the beam 2.

Description

Technical Field

[0001] The present invention relates to a ceiling panel and an attachment structure of the ceiling panel.

Background Art

[0002] Patent Document 1 discloses a ceiling system. The ceiling system 1A of Patent Document 1 includes a support frame 2 suspended from a ceiling slab of a building body via a suspension fitting 3, a ceiling panel 10A provided between support frames 2 adjacent to each other in the horizontal direction, and a ceiling panel attachment jig 20A for detachably attaching the ceiling panel 10A to the support frame 2.

[0003] The ceiling panel attachment jig 20A has an upper plate 21B provided at a corner of the ceiling panel 10A, a lower plate 22B disposed below the support frame 2, and a screw member 24 for connecting the upper plate 21B and the lower plate 22B.

[0004] In Patent Document 1 above, to attach the ceiling panel 10A to the support frame 2, the ceiling panel 10A is placed on the support frame 2 with the upper plate 21B provided at at least two corners of the ceiling panel 10A. Then, the lower plate 22B is disposed below the support frame 2, and the upper plate 21B and the lower plate 22B are screwed together with the screw member 24 for construction.

Prior Art Documents

Patent Documents

[0005] Japanese Patent No. 70\(79682\)

Summary of the Invention

Problems to be Solved by the Invention

[0006] The ceiling panel 10A described above is formed from a glass fiber pulp mixed sheet, etc., with glass fibers and pulp as the main raw materials. However, when attaching the ceiling panel 10A to the support frame 2, the ceiling panel mounting jig 20A is provided at the corners and supported by the support frame 2, causing the ceiling panel 10A to sag under its own weight and curve downwards.

[0007] Therefore, the object of the present invention is to provide a ceiling panel and a ceiling panel mounting structure that increase rigidity. [Means for solving the problem]

[0008] The present invention relates to a ceiling panel to be attached to a grid enclosed by beams arranged in a grid pattern on the ceiling, and comprises a rectangular plate material having a pair of rising parts formed by bending a pair of opposing one-side ends in one direction of the rectangle, and a pair of opposing other-side ends in the other direction, a connecting member arranged at each of the pair of other-side ends to connect the pair of rising parts, and a locking part to lock the ceiling panel to the beam.

[0009] In the above ceiling panel, the tilting of the rising portion is suppressed by the connecting member, increasing the rigidity of the panel material by the rising portion, and the ceiling panel can be attached to the beam by locking the locking portion to the beam.

[0010] In the present invention, the connecting member may include a first locking portion as the locking portion, which includes a first protruding portion that protrudes outward along the other direction.

[0011] With the above ceiling panel, the connecting members can be locked to the beams, allowing the ceiling panel to be attached to the beams.

[0012] In the present invention, the connecting member may include a bottom plate portion extending in a strip shape in one direction between the pair of upright portions, a first locking portion provided on the bottom plate portion, and a vertical plate portion erected on the bottom plate portion on the inside of the other direction relative to the first locking portion and provided along the one direction.

[0013] In the above ceiling panel, a pair of opposing upright sections in one direction and vertical sections provided along one direction form a reinforcement that is erected on the panel material, thereby suppressing twisting of the ceiling panel.

[0014] The present invention includes a second locking portion provided on the rising portion as the locking portion, and the second locking portion may include a second projection that protrudes outward along one of the directions.

[0015] In the above ceiling panel, a pair of first locking parts lock onto beams aligned in the other direction, and a pair of second locking parts lock onto beams aligned in one direction. This allows all four sides of the panel to be locked to the beams, enabling the ceiling panel to be stably fixed.

[0016] In the present invention, the connecting member may include side plate portions formed at both ends of the bottom plate portion in one direction, and may also include a fixing member for fixing the rising portion, the second locking portion, and the side plate portions.

[0017] In the above ceiling panel, the rising portion, fixing members, and side panels can be fixed with a common fixing member, thus improving the ease of installation of the ceiling panel.

[0018] The present invention is a ceiling panel mounting structure in which beams are arranged in a grid pattern on the ceiling, and a ceiling panel as described above is attached to one of the grids enclosed by the beams. [Effects of the Invention]

[0019] According to the ceiling panel and ceiling panel mounting structure of the present invention, the tilting of the rising portion can be suppressed by the connecting member, and the rigidity of the panel material can be increased by the rising portion. [Brief explanation of the drawing]

[0020] [Figure 1] This is a plan view showing one of the ceiling panels according to the embodiment of the present invention in a state where it is not attached to a beam. [Figure 2]It is a sectional view taken along the line II-II of FIG. 1. [Figure 3] It is an enlarged view showing III of FIG. 2. [Figure 4] It is a plan view of a state in which one of the ceiling panels is attached to a beam. [Figure 5] It is a sectional view taken along the line V-V of FIG. 4. [Figure 6] It is an enlarged view showing VI of FIG. 5. [Figure 7] It is a sectional view taken along the line VII-VII of FIG. 4. [Figure 8] It is an enlarged view showing VIII of FIG. 7. [Figure 9] It is a perspective view from the upper surface side of the ceiling panel. [Figure 10] It is a perspective view from the upper surface side of the panel, and is a perspective view in a state where the connecting member and the second locking portion are removed from the panel body. [Figure 11] It is an enlarged perspective view showing XI in FIG. 9. [Figure 12] It is a perspective view of the main part from the upper surface side of the mounting structure of the ceiling panel according to the embodiment of the present invention. [Figure 13] It is a side view of the beam. [Figure 14] It is a plan view. [Figure 15] It is a front sectional view.

Mode for Carrying Out the Invention

[0021] The ceiling panel and the mounting structure of the ceiling panel according to an embodiment of the present invention will be described based on FIGS. 1 to 15. As shown in FIGS. 1 to 8, the mounting structure 1 of the ceiling panel (hereinafter simply referred to as the mounting structure 1) is used, for example, as a ceiling of a building such as a building. The mounting structure 1 includes a beam 2 and a plurality of ceiling panels 3.

[0022] Here, beam 2 will be explained based on Figures 13 to 15 of Figures 1 to 15. Beam 2 is installed in the ceiling slab (not shown), which constitutes part of the building's structure, and is arranged to extend along two directions, one in which it intersects with the other in the horizontal plane. Therefore, when observing beam 2 as a whole, it appears to be arranged in a grid pattern from below and above (see Figure 12).

[0023] The beam 2 includes a suspension fitting 2A positioned above and extending horizontally, a support member 2B positioned below the suspension fitting 2A and extending vertically, and a hook portion 2C positioned below the support member 2B and extending horizontally.

[0024] The suspension fitting 2A has the function of suspending the entire beam 2 from the ceiling slab (not shown). The support member 2B is formed integrally with the suspension fitting 2A and is a plate-shaped member that runs vertically. An intermediary member 2D is positioned in the middle of the support member 2B to connect it with the support member 2B of an adjacent beam 2.

[0025] The hook portion 2C is formed in a dovetail groove shape with its vertical cross-section centered on the lower end of the support member 2B. This hook portion 2C has a pair of locking surfaces 2a, 2a positioned on the upper part in the same plane, side wall portions 2b, 2b hanging down from both sides of the locking surfaces 2a, 2a, and folded-over portions 2c, 2c extending from the lower ends of the side wall portions 2b, 2b to each other. The locking surfaces 2a, 2a protrude horizontally from both sides via the lower end of the support member 2B. The upper surfaces of the locking surfaces 2a, 2a are horizontal, and the sides of the side wall portions 2b, 2b are vertical.

[0026] Next, the ceiling panel 3 will be described based on Figures 9 to 11. Multiple ceiling panels 3 are provided. Since each ceiling panel 3 has the same configuration, one ceiling panel 3 will be described to serve as a substitute for the other ceiling panels 3. The ceiling panel 3 is installed on four beams 2 that form a rectangular grid, consisting of two beams 2 that are perpendicular to each other in the horizontal plane, one in one direction and the other in the other direction.

[0027] The ceiling panel 3 comprises a rectangular plate material and connecting members 5, 5. The plate material comprises a panel body 3A, a pair of raised portions 4, 4 formed by bending one end, and a pair of other ends, and the connecting members 5, 5 are arranged at the pair of other ends.

[0028] The panel body 3A is formed in a rectangular shape and is a laminate (laminated board) in which metal plates, resin plates, and metal plates are stacked in sequence. Specifically, the resin plates are made from thermoplastic synthetic resins such as polyethylene, polypropylene, ABS resin, and polyvinyl chloride. However, it is not limited to these, and can be made from appropriate materials such as wood or cardboard.

[0029] The panel body 3A has a flat upper panel surface 3a and a lower panel surface 3b that faces the upper panel surface 3a in the vertical direction, and a panel end surface 3c at the end in the direction of the other L2. The area of ​​the panel body 3A from above is set to be slightly smaller than the area of ​​the four beams 2 arranged on the ceiling, which are two beams 2 in two directions that are mutually orthogonal in the horizontal plane, forming a single rectangular grid, that is, the area formed by the four locking surfaces 2a, 2a shown in Figures 13 to 15.

[0030] Furthermore, in the panel body 3A, a decorative material is applied to the side of the metal plate that is viewed by the viewer, i.e., the bottom surface 3b of the panel. This decorative material may be a metal foil such as aluminum alloy, copper, or stainless steel, or a sheet such as decorative cloth.

[0031] The pair of upright sections 4, 4 are formed by bending them relative to the panel body 3A by forming recessed grooves M at one end of each section of the laminate.

[0032] As shown in Figure 9, the rising sections 4,4 have rising outer surfaces 4a,4a, rising inner surfaces 4b,4b facing them at one direction L1, rising upper surfaces 4c,4c that are continuous with the rising outer surfaces 4a,4a and the rising inner surfaces 4b,4b at the top, and other end surfaces 4d,4d in the direction of the other direction L2. The rising upper surfaces 4c,4c of the pair of rising sections 4,4 are formed at the same height with respect to the panel body 3A. The thickness of the rising sections 4,4 is the same as the thickness of the panel body 3A. As shown in Figure 10, in the pair of rising sections 4,4, screw through holes 4e are formed at the ends in the other direction, spaced apart in the other direction.

[0033] The connecting members 5,5 will now be described. As shown in Figure 9, the connecting members 5,5 have a line-symmetric structure with respect to the other-direction center line CL of the panel body 3A. For this reason, when describing the connecting members 5,5, one connecting member 5 will be described, and this will serve as a substitute for the remaining connecting member 5.

[0034] The connecting member 5 comprises a bottom plate portion 6, a vertical plate portion 7, a first locking portion 8, and a side plate portion 9. The connecting member 5 is provided separately from the panel body 3A and is made of metal.

[0035] The bottom plate portion 6 is formed in a plate shape that extends along one and the other direction, and is positioned extending between the inner surfaces 4b, 4b of the rising portions. In other words, the bottom plate portion 6 extends in a strip shape in the direction of one L1 between the pair of rising portions 4, 4. The bottom plate portion 6 has a bottom plate end surface 6a in the direction of the other L2.

[0036] The bottom plate portion 6 has a vertical plate outer surface 7a positioned in the other direction L2, a vertical plate inner surface 7b facing the vertical plate outer surface 7a in the other direction L2, and vertical plate side surfaces 7d, 7d positioned in one direction L1, and a vertical plate end surface 7c that is continuous with the vertical plate outer surface 7a and the vertical plate inner surface 7b at the top. Such a vertical plate portion 7 is formed in a plate shape integrally formed with the bottom plate portion 6. Specifically, a plate-shaped member is bent to form the bottom plate portion 6 and the vertical plate portion 7, and the bottom plate portion 6 is a member that rises vertically from the opposite side of the bottom plate end surface 6a (the inside of the bottom plate portion 6).

[0037] The vertical plate section 7 is positioned between the pair of rising sections 4, 4, extending between the inner surfaces 4b, 4b of the rising sections, similar to the bottom plate section 6. The vertical plate end face 7c and the upper surfaces 4c, 4c of the rising section 4 are formed at the same height with respect to the panel body 3A. In other words, the vertical plate end face 7c and the upper surfaces 4c are positioned in the same plane.

[0038] As shown in Figure 11, the first locking portion 8 is provided on the bottom plate portion 6 and comprises an upright portion 10 and a first protruding portion 11. The upright portion 10 is integrally formed with the other end of the bottom plate portion 6, rises from the bottom plate portion 6, and is positioned to face the vertical plate portion 7 in the other direction L2. With the panel body 3A as the reference, the upper end of the upright portion 10 is positioned lower than the vertical plate end surface 7c of the vertical plate portion 7.

[0039] The first projection 11 protrudes outward from the upper end of the upright portion 10 and horizontally, and is formed to protrude outward in the direction of the other L2 of the bottom plate portion 6. The first projection 11 is located above the panel body 3A by the height of the upright portion 10. The first projection 11 is positioned to protrude outward from the panel end surface 3c in the direction of the other L2. The first projection 11 has a first projection upper surface 11a and a first projection lower surface 11b that is vertically opposite to the first projection upper surface 11a. The first projection lower surface 11b is a flat surface. Due to this shape, the cross-section of the first locking portion 8, which comprises the upright portion 10 and the first projection 11, in the direction of the one L1 is formed in an inverted L-shape. The first locking portion 8 is provided along the bottom plate portion 6, but is formed to be shorter than the distance between the pair of upright portions 4, 4.

[0040] The vertical plate portion 7, the first locking portion 8, and the bottom plate portion 6 are arranged such that the vertical plate portion 7 is erected on the bottom plate portion 6 on the inside of the other direction L2 relative to the first locking portion 8, and is positioned along the other direction L1.

[0041] As shown in Figure 9, the side plate portion 9 is a member formed at both ends of the bottom plate portion 6 in one direction L1. The side plate portion 9 is a plate-shaped member and is integrally formed with the bottom plate portion 6 by raising the side plate portion 9 on both sides of the bottom plate portion 6 in one direction L1. Therefore, the side plate portion 9 is formed in a rectangular shape. As shown in Figure 10, the side plate portion 9 has an outer side surface 9a that can abut against the inner rising surfaces 4b, 4b of the rising portions 4, 4, and an inner side surface 9b that faces the outer side surface 9a in one direction L1. The side plate portion 9 also has an upper end surface 9c and a side end surface 9d in the other direction L2. The upper end surface 9c of the side plate is set to be flush with the upper rising surfaces 4c, 4c of the rising portion 4. The side end surface 9d of the side panel portion 9 is set to be flush with the other side end surfaces 4d, 4d of the rising portions 4, 4 (the panel end surface 3c of the panel body 3A).

[0042] Screw holes 9e are formed on the surface of the side plate portion 9, spaced apart in the direction of the other L2, and the axes of these screw holes 9e coincide with those of the screw holes 4e of the rising portions 4,4. In addition, screw holes 9f (see Figures 9 and 10) with tapped holes formed inside are integrally formed on the inner surface 9b of the side plate portion 9, corresponding to the screw holes 9e.

[0043] The ceiling panel 3 comprises a panel body 3A and rising parts 4, 4, which are made of a plate material, and connecting members 5, 5, and also includes a second locking part 12 as shown in Figures 9 to 11. The second locking part 12 is located on both sides of the pair of rising parts 4, 4 in the direction of the other L2. The second locking part 12 comprises a second locking body 13 and a second projection 14.

[0044] The second locking body 13 is formed in the shape of a rectangular plate and is positioned at both ends of the rising parts 4, 4 in the direction of the other L2. In other words, the second locking bodies 13 are positioned in pairs so as to be the end faces in the direction of the other L2. Each second locking body 13 has a back surface 13a, a front surface 13b facing the back surface 13a in the direction of the other L1, an upper end surface 13c connecting the back surface 13a and the front surface 13b at the top, the other outer end surface 13d, and the other inner end surface 13e facing the other outer end surface 13d in the direction of the other L2. The second locking body 13 protrudes outward in the direction of the one L1 from the rising outer surfaces 4a, 4a of the rising parts 4, 4.

[0045] The back surface 13a of the second locking body 13 is designed to abut against the outer surfaces 4a, 4a of the rising sections 4, 4. The upper end surface 13c of the second locking body 13 is set to be flush with the upper surfaces 4c, 4c of the rising sections 4, 4. The other outer end surface 13d of the second locking body 13 is set to be flush with the other end surfaces 4d, 4d of the rising sections 4, 4. In addition, the second locking body 13 has spaced-apart screw through holes 13f formed on the other side L2.

[0046] The second projection 14 is formed horizontally so as to rise integrally from the lower end of the second locking body 13. The second projection 14 protrudes outward from the lower side of the second locking body 13 along one direction L1. Such a second projection 14 has a second projection upper surface 14a and a second projection lower surface 14b that is vertically opposite to the second projection upper surface 14a. The second projection lower surface 14b is a flat surface.

[0047] The second lower surface 14b of the second protrusion 14 and the first lower surface 11b of the first protrusion 11 are located in the same plane. The first lower surface 11b of the first protrusion 11 and the second lower surface 14b of the second protrusion 14 are located above the lower surface 3b of the panel body 3A.

[0048] In the ceiling panel 3 described above, the pair of rising sections 4,4 are formed as follows: A folded line is formed at one end of the laminate of the ceiling panel 3. This folded line is a groove shape (recessed groove M) formed in the resin plate with one metal plate side open. By bending the panel so that this recessed groove M is brought closer together, the pair of rising sections 4,4 are formed on the panel body 3A. That is, as shown in Figure 11, a V-shaped recessed groove M is formed at the ends of the rising sections 4,4 and the end of the panel body 3A that is continuous therewith, extending from the metal on the surface side to the metal on the back side. By bringing the metal on the surface side of the rising sections 4,4 and the metal on the surface side of the panel body 3A closer together, the resin plates of the rising sections 4,4 and the resin plates of the panel body 3A closer together, and the metal on the back side of the rising sections 4,4 and the metal on the back side of the panel body 3A closer together, the recessed groove M is filled, and the rising sections 4,4 and the panel body 3A are formed.

[0049] In this type of ceiling panel 3, compared to a ceiling panel 3 made of metal, a thinner metal plate can be used for the same thickness, thus reducing weight. Furthermore, it allows for easier processing of groove shapes and suppresses springback.

[0050] As shown in Figure 10, each connecting member 5, 5 is attached to the upper surface 3a of the panel body 3A. At this time, the bottom plate portion 6 of the connecting member 5 is aligned along the other end of the upper surface 3a of the panel, and the vertical plate portion 7 is positioned on the inside in the other direction L2 of the panel body 3A. In this way, the first locking portions 8 of the connecting members 5, 5 are positioned on the outside of the panel body 3A. In addition, the outer surface 9a of the side plate portion 9 is positioned opposite the inner surfaces 4b, 4b of the rising portions 4, 4.

[0051] Once all connecting members 5, 5 have been placed on the upper surface 3a of the panel, the second locking part 12 is installed on the other end of the outer surface 4a, 4a of each rising part 4, 4, as shown in Figure 9. At this time, the second protruding part 14 of the second locking part 12 is installed so that it is on the lower side. Then, the fixing member N (bolt) is inserted from the outside of the rising parts 4, 4 through the screw through hole 13f of the second locking body 13, the screw through hole 4e of the rising parts 4, 4, and the screw through hole 9e of the side plate part 9, and screwed into the screw hole 9f of the side plate part 9.

[0052] In this state, as shown in Figure 11, the upper end surface 9c of the side plate is flush with the upper side surfaces 4c,4c of the rising sections 4,4, the side end surface 9d of the side plate section 9 is flush with the other end surfaces 4d,4d of the rising sections 4,4 (the panel end surface 3c of the panel body 3A), the upper end surface 13c of the second locking body 13 is flush with the upper side surfaces 4c,4c of the rising sections 4,4, and the other outer end surface 13d of the second locking body 13 is flush with the other end surfaces 4d,4d of the rising sections 4,4.

[0053] Furthermore, the second lower surface 14b of the second protrusion 14 and the first lower surface 11b of the first protrusion 11 are located in the same plane. Also, the first lower surface 11b of the first protrusion 11 and the second lower surface 14b of the second protrusion 14 are located above the lower surface 3b of the panel body 3A.

[0054] As mentioned above, the area of ​​the panel body 3A is set to be slightly smaller than the area of ​​the four beams 2 arranged on the ceiling, which are two beams 2 that intersect each other in the horizontal plane and form a single rectangular shape. Furthermore, the area including the first protrusions 11, 11 and the second protrusions 14, 14 is smaller than the area formed between the support members 2B, 2B between the beams 2 in one direction L1, and between the support members 2B, 2B between the beams 2 in the other direction L2.

[0055] The ceiling panel 3 is changed from the state shown in Figure 1, where one central panel is not attached to the beam 2, to the state shown in Figure 4, where one panel is attached to the beam 2. In this case, the ceiling panel 3 is installed on four beams 2 that form a single rectangular shape, which are two beams 2 that intersect each other in the horizontal plane among the beams 2 arranged on the ceiling.

[0056] Furthermore, pairs of beams 2 in one direction L1 and pairs of beams 2 in the other direction L2 are arranged in two mutually orthogonal directions within the horizontal plane. Therefore, as shown in Figures 5 to 8, when the ceiling panel 3 is installed between the beams 2, the first lower protruding surface 11b of the first protruding part 11 or the second lower protruding surface 14b of the second protruding part 14 rests on the upper surface of either the locking surface parts 2a, 2a that protrude horizontally via the lower end of the support member 2B. In other words, the first lower protruding surface 11b locks onto the locking surface part 2a of the hooking part 2C on the beam 2 from above, and the second lower protruding surface 14b locks onto the locking surface part 2a of the hooking part 2C on the beam 2 from above, so that the ceiling panel 3 rests on the locking surface parts 2a, 2a of the beam 2. The state in which the ceiling panel 3 is locked to the beam 2 from above is considered the mounting structure 1.

[0057] When ceiling panels 3 are installed on a rectangular beam 2 with four directional beams, the first protrusion 11 and the second protrusion 14 are positioned above the lower surface 3b of the panel body 3A. In other words, with the first protrusion 11 and the second protrusion 14 resting on the beam 2, the lower surface 3b of the panel body 3A becomes the lower surface of the beam 2. In this embodiment, the lower surface of the beam 2 is the folded portion 2c of the hook portion 2C, and the folded portion 2c of the hook portion 2C and the lower surface 3b of the panel body 3A are substantially flush.

[0058] In this embodiment, the II-II direction cross-section in Figure 1 is the cross-section where the first locking portion 8 rests on the locking surfaces 2a,2a of the beam 2. In other words, it is the cross-section in the direction L1 of the ceiling panel 3. The same applies to the V-V direction cross-section in Figure 4, and therefore the VII-VII direction cross-section in Figure 4 is the cross-section in the direction L2 of the ceiling panel 3.

[0059] As mentioned above, the area including the first protrusions 11,11 and the second protrusions 14,14 is smaller than the area formed between the support members 2B,2B between the beams 2 in the direction L1 and between the support members 2B,2B between the beams 2 in the direction L2. However, the overhang dimensions of the first protrusion 11 from the upright portion 10 and the overhang dimensions of the second protrusion 14 from the second locking body 13 are not specifically defined in the above embodiment. Here, the overhang dimension of the first protrusion 11 from the upright portion 10 may be the same as the thickness dimension of the panel body 3A, longer, or shorter. The overhang dimension of the second protrusion 14 from the second locking body 13 may be the same as the thickness dimension of the panel body 3A, longer, or shorter. With these overhang dimensions, the first protrusions 11,11 and the second protrusions 14,14 can be placed on the locking surfaces 2a,2a.

[0060] Since the ceiling panel 3 is made of a laminate of metal plate, resin plate, and metal plate, it is lighter than a simple metal plate. Therefore, even if the overhang dimensions of the first protrusion 11 and the second protrusion 14 are reduced, it can be stably secured between the beams 2. In addition, when installing the ceiling panel 3 to the ceiling, the reduced overhang dimensions make it easier to place the ceiling panel 3 on the beams, thus improving workability.

[0061] According to the ceiling panel 3 of the above embodiment, the connecting members 5, 5 suppress the tilting of the rising parts 4, 4, and the rising parts 4, 4 increase the rigidity of the ceiling panel 3. According to the mounting structure 1, the ceiling panel 3 can be attached to the beams 2, 2 by the first protrusions 11 and second protrusions 14 of the connecting member 5. Furthermore, since the pair of first protrusions 11 engage with the beams 2 aligned in the other direction L2, and the pair of second engaging parts 12 engage with the beams 2 aligned in the one direction L1, all four sides of the panel body 3A can be engaged with the beams 2, 2, and the ceiling panel 3 can be stably fixed.

[0062] Furthermore, with the ceiling panel 3, a rectangular frame-like portion is formed on the panel body 3A by the rising portions 4,4 and the vertical plate portions 7,7, thus suppressing twisting of the ceiling panel 3. In this embodiment, the frame-like portion consists of a pair of rising portions 4,4 and a pair of vertical plate portions 7,7. Therefore, with the mounting structure 1, the panel body 3A is not supported by the beam 2 at a single point, and for this reason, even when the ceiling panel 3 is attached to the beam 2,2, the panel body 3A does not sag.

[0063] Furthermore, in this embodiment, the lower surface of the beam 2 is the folded portion 2c of the hook portion 2C, and the folded portion 2c of the hook portion 2C and the lower surface 3b of the panel body 3A are substantially flush, thereby improving the smoothness of the ceiling.

[0064] In terms of ease of installation, the rising sections 4,4, the fixing members N, and the side panels 9 can be fixed together with a common fixing member N, which also improves the ease of installation of the ceiling panel 3 itself.

[0065] The present invention is not limited to the above embodiment. In the above embodiment, as shown in Figure 13, the locking surfaces 2a, 2a of the hooking portion 2C of the beam 2 are formed on the same plane in one direction L1 and the other direction L2. However, the locking surfaces 2a, 2a can also be spaced apart in the vertical direction. In this case, as the mounting structure 1, the first projection 11 and the second projection 14 can be arranged to lock onto different locking surfaces 2a, 2a in the vertical direction. For example, the first projection 11 can be locked onto the lower locking surface 2a of the locking surfaces 2a, 2a, and the second projection 14 can be locked onto the higher locking surface 2a of the locking surfaces 2a, 2a. Conversely, the second projection 14 can be locked onto the lower locking surface 2a, and the first projection 11 can be locked onto the higher locking surface 2a.

[0066] In the above embodiment, the locking portion is defined as the first protrusion 11 of the first locking portion 8 and the second protrusion 14 of the second locking portion 12. However, for example, it is also possible to lock the beam 2 by forming only one of the first protrusion 11 or the second protrusion 14.

[0067] In the above embodiment, the first locking portion 8 is arranged along the bottom plate portion 6. However, the first locking portion 8 can also be formed intermittently in one direction L1. Furthermore, the first locking portion 8 can be formed separately from the connecting member 5. For example, the first locking portion 8 can be formed on the panel end surface 3c in the other direction L2 of the panel body 3A.

[0068] In the above embodiment, the second locking portion 12 is arranged on both sides of the pair of rising portions 4, 4 in the direction of the other L2. However, three or more second locking portions 12 may be arranged intermittently. In this case, the second protrusion 14 does not necessarily have to be provided on each second locking portion 12, and the second protrusion 14 can be provided on at least two of the second locking portions 12.

[0069] In the above embodiment, a rectangular frame-like portion is formed on the panel body 3A by a pair of rising portions 4,4 and a pair of vertical plate portions 7,7. However, the vertical plate portions 7,7 can also be provided in the intermediate portion of the pair of rising portions 4,4 in the direction of the other portion L2.

[0070] Furthermore, in order to fix the connecting member 5 to the panel body 3A, a bonding means, such as a double-sided adhesive, can be provided between the bottom plate 6 and the panel body 3A. This ensures that the panel body 3A and the connecting member 5 are firmly connected in the vertical direction.

[0071] Furthermore, the locking described above refers to a state in which the first protruding portion 11 and the first locking portion 8 are locked to the locking surface portion 2a of the beam 2 from above. However, as an alternative form of locking, claws may be provided on the first locking portion 8 and the second locking portion 12, and these claws may be hooked onto the beam 2. Also, simply resting the claws on top of each other is another form of locking. [Explanation of Symbols]

[0072] 1: Installation structure of ceiling panel; 2: Beam; 2A: Hanging hardware; 2B: Supporting components; 2C: Hanging part; 2D: Mounting components; 2a: Fixing surface; 2b: Side wall; 2c: Folding / returning part; 3: Ceiling panel; 3A: Panel body; 3a: Top of panel; 3b: Bottom of panel; 3c: End face of panel; 4,4: Upper part; 4a,4a: Outer side of upper part; 4b,4b: Inner side of upper part; 4c,4c: Upper side of upper part; 4d,4d: Other side end face; 4e: Through hole; 5,5: Connecting components; 6: Base plate; 6a: End face of base plate; 7: Ridge plate; 7a: Outer side of ridge plate; 7b: Ridge plate 7c: End face of the ridge plate; 8: First stop part; 9: Side plate part; 9a: Outer side surface of the side plate; 9b: Inner side surface of the side plate; 9c: Upper upper surface of the side plate; 9d: End face of the side plate; 9e: Through hole; 9f: Nezha hole; 10: Erect part; 11: First protrusion; 11a: Upper surface of the first protrusion; 11b: Lower surface of the first protrusion; 12: Second stop part; 13: Second stop body; 13a: Back side; 13b: Front side; 13c: Upper end face; 13d: Other side end face; 13e: Other inner end face; 13f: Through hole; 14: Second protrusion; 14a: Upper surface of the second protrusion; 14b: Lower surface of the second protrusion; CL: Center line in another direction.

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