JP7825203B2 - Ceiling panel - Google Patents

Description

This disclosure relates to ceiling panels.

BACKGROUND ART Ceiling panels that are installed on various installation targets have been known.
For example, Patent Document 1 listed below discloses a structure in which a rail is fixed to a rail fixture fixed to a ceiling and a wall surface, and a rail is fixed to a wall panel fixture fixed to the wall surface, and a ceiling panel fitting portion having upper and lower plate pieces into which the side end of the ceiling panel is fitted.

JP 2013-234524 A

However, the structure described in Patent Document 1 requires the provision of wires to secure the ceiling panel to the rails, as well as wire fixing portions on the rails to secure these wires to the rails, leaving further improvements desirable.

This disclosure was made in consideration of the above-mentioned circumstances, and aims to provide a ceiling panel that simplifies the structure while improving the fixing strength of the members fixed to the ends of the panel body.

To achieve the above object, the ceiling panel disclosed herein comprises a panel body and a retained member that is fixed to both ends of the panel body in a first direction, has an elongated shape extending in a second direction perpendicular to the first direction, and is retained on a ceiling substrate; the retained member comprises a groove bottom piece that defines the bottom of a receiving groove that receives the end, a first side piece that defines one side of the receiving groove in the groove width direction, and a second side piece that has a groove depth dimension smaller than the groove depth dimension of the first side piece and defines the other side of the receiving groove in the groove width direction; the second side piece has an adhesive reservoir groove that opens toward the first side piece and extends in the second direction to secure the retained member to the end.

By adopting the above-described configuration, the ceiling panel according to the present disclosure can simplify the structure while improving the fixing strength of the components fixed to the end of the panel body.

1A and 1B are schematic views of an example of a ceiling panel according to an embodiment of the present disclosure, where FIG. 1A is a partially cutaway, schematic exploded vertical cross-sectional view, and FIG. 1B is a partially cutaway, schematic vertical cross-sectional view. FIG. 2 is a schematic perspective view of the ceiling panel. FIG. 2 is a partially cutaway schematic vertical cross-sectional view showing the ceiling panel after installation.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
In some drawings, some of the detailed reference numerals used in other drawings are omitted.
In the following embodiment, directions such as the up-down direction will be described based on the state in which an example of a ceiling panel according to this embodiment is installed.
1 to 3 are diagrams schematically showing an example of a ceiling panel according to this embodiment and an example of a ceiling panel installation structure using the same ceiling panel.

As shown in Figures 2 and 3, the ceiling panel 1 according to this embodiment comprises a panel body 10 and retained members 11, 11 fixed to both ends of the panel body 10 in a first direction, elongated and extending in a second direction perpendicular to the first direction, and retained by the ceiling substructure 2. The retained members 11, 11 on both sides in the first direction of the ceiling panel 1 are retained by a pair of frames 2a, 2a constituting the ceiling substructure 2. These frames 2a, 2a may be suspended from a slab or steel frame or other structure above, which serves as a suspension point, using hangers 2e and suspension bolts 2f as suspension members. Some of the multiple hangers 2e may be fitted with brace fixtures 2g to which the lower ends of braces (not shown) are attached. An example of the specific configuration of the frame 2a will be described later.

This ceiling panel 1 may also be an equipment mounting panel for mounting various types of equipment 6 between other ceiling panels 7, 7 arranged adjacently on both sides of the ceiling panel 1 in the first direction. The equipment 6 mounted on this ceiling panel 1 is not limited to a fire detector as shown in the illustration, but may also be lighting fixtures, audio equipment, fans, drying devices, storage devices, etc., or various other types of facility equipment.
This ceiling panel 1 may be installed as a ceiling for relatively small buildings such as residences and offices, or may be installed as a ceiling for various relatively large buildings such as gymnasiums, halls, shopping malls, factories, and schools.
The other ceiling panels 7, 7 arranged on both sides of the ceiling panel 1 in the first direction may be held by appropriate siding supports suspended from the same hanging members as above and held by sidings 3, 3 arranged to extend in the first direction. These other ceiling panels 7, 7 may be rectangular flat plates with standard dimensions. These other ceiling panels 7, 7 may have a length along the first direction of approximately 600 mm to 3000 mm, a width along the second direction of approximately 300 mm to 1200 mm corresponding to the pitch of the sidings 3, and a thickness of approximately 3.0 mm to 20.0 mm.

The ceiling panel 1 has a generally rectangular flat plate shape that is elongated in the second direction. The length of the ceiling panel 1 in the second direction may be, for example, approximately 600 mm to 2000 mm. The length of the ceiling panel 1 in the second direction may be approximately twice the width of the other ceiling panels 7 in the second direction. When various devices 6 are installed on the underside of the ceiling panel 1, the width of the ceiling panel 1 in the first direction may be a dimension that corresponds to the dimensions of the devices 6, and may be, for example, approximately 150 mm to 600 mm. The thickness of the ceiling panel 1 may be approximately the same as the thickness of the other ceiling panels 7.
The panel body 10 has a rectangular flat plate shape that is elongated in the second direction. The panel body 10 may be a board that is generally used as a ceiling board. The panel body 10 may be formed from the same panel material as the other ceiling panels 7, or may be formed from a different panel material. The panel body 10 may be made of, for example, a relatively fragile gypsum board, a calcium silicate board, a foam resin board, or the like, so that holes can be easily drilled at the construction site for the installation of the equipment 6, wiring, etc.

As shown in FIG. 1, the retained member 11 includes a groove bottom piece 13 defining the groove bottom of the receiving groove 12 that receives the first-direction end of the panel body 10; a first side piece 14 defining one side of the receiving groove 12 in the groove width direction; and a second side piece 16 defining the other side of the receiving groove 12 in the groove width direction. The dimension W2 of the second side piece 16 in the groove depth direction (the groove depth direction of the receiving groove 12) is smaller than the dimension W1 of the first side piece 14 in the groove depth direction. With this configuration, by arranging the ceiling panel 1 so that the second side piece 16 faces the interior side, as shown in the illustration, the retained member 11 can be made less noticeable from the interior side. Furthermore, when various types of equipment 6, such as facility devices, are installed on the interior side (underside) of the ceiling panel 1, interference between the second side piece 16 and the equipment 6 can be reduced. In other words, the equipment installation space between the second side pieces 16, 16 of the held members 11, 11 provided on both sides of the ceiling panel 1 in the first direction can be effectively increased, making the ceiling panel 1 suitable for installing equipment 6.

The second side piece 16 has a reservoir groove 17 for adhesive 8 that opens toward the first side piece 14 and extends in the second direction. This configuration allows the retained member 11 to be secured to the end of the panel body 10 in the first direction with adhesive 8, simplifying the structure compared to configurations requiring wires or the like. Furthermore, the reservoir groove 17 is provided in the second side piece 16, which has a smaller groove depth dimension W2, and the groove depth dimension W1 of the first side piece 14 is greater than the same dimension W2 of the second side piece 16. This ensures a sufficient adhesive area on the first side piece 14 side, and prevents adhesive 8 from spilling out on both sides while reducing the groove depth dimension W2 of the second side piece 16. This prevents the structure from detracting from aesthetic appeal.

The first side piece 14 and the second side piece 16 are provided with protrusions 15, 18 (first protrusion 15 as a protrusion of the first side piece 14 and second protrusion 18 as a protrusion of the second side piece 16) that protrude in directions facing each other and extend in the second direction. With this configuration, the first protrusion 15 and second protrusion 18 of the first side piece 14 and the second side piece 16 can ensure a gap for forming the adhesive layer 9 with the panel main body 10, while also preventing the held member 11 from tilting around an axis along the second direction relative to the panel main body 10.
The second side piece 16 has a second protrusion 18 provided closer to the groove opening (groove opening of the receiving groove 12) than the reservoir groove 17. With this configuration, the second protrusion 18 can more effectively prevent the adhesive 8 from spilling out from the groove opening side of the second side piece 16.
The protrusion dimension H1 of the first protrusion 15 is larger than the protrusion dimension H2 of the second protrusion 18. With this configuration, the gap formed between the first protrusion 15 and the panel body 10 is larger on the first side piece 14 side, which makes it easier for the adhesive 8 to flow toward the first side piece 14 side, and more effectively prevents the adhesive 8 from spilling out on the second side piece 16 side.

First protrusions 15, 15 are provided on the first side piece 14 at multiple locations in the groove depth direction, and a second protrusion 18 is provided on the groove opening side of the second side piece 16 so as to be positioned between two of these first protrusions 15, 15 in the groove depth direction. With this configuration, the end of the panel main body 10 can be held by being sandwiched between at least the two first protrusions 15, 15 of the first side piece 14 and the second protrusion 18 on the groove opening side of the second side piece 16. Furthermore, because the second protrusion 18 on the groove opening side of the second side piece 16 is positioned between the two first protrusions 15, 15 of the first side piece 14, tilting of the held member 11 around an axis along the second direction relative to the panel main body 10 can be more effectively prevented. Furthermore, compared to a configuration in which the second protrusion 18 of the second side piece 16 and the first protrusions 15, 15 of the first side piece 14 are formed at the same position in the groove depth direction, the end of the panel body 10 can be inserted more smoothly into the receiving groove 12.

2, the held members 11, 11 on both sides in the first direction are provided so as to cover both ends in the first direction of the panel main body 10 over substantially the entire length in the second direction. Since these held members 11, 11 on both sides in the first direction have the same configuration, one of them will be used as an example to explain an example of the specific configuration below.
The held member 11 has a generally uniform shape over its entire length. The held member 11 may be an extrusion molded product made of a metal material or a synthetic resin material and having a generally uniform cross-sectional shape over its entire length.
1(a) and 1(b), the receiving groove 12 opens toward the center of the panel width direction of the panel main body 10 and is provided so as to penetrate the entire length of the held member 11. This receiving groove 12 is in the shape of a substantially square groove.

The groove bottom piece 13 is generally plate-shaped, with its thickness direction being the groove depth direction of the receiving groove 12 (the panel width direction of the panel body 10).
The first side piece 14 extends in the groove depth direction from one edge (ceiling substrate side) of the groove bottom piece 13 in the groove width direction of the receiving groove 12 (the panel thickness direction of the panel body 10). This first side piece 14 is generally plate-shaped, with its thickness direction being the groove width direction of the receiving groove 12. The dimension W1 of this first side piece 14 in the groove depth direction may be set appropriately from the perspectives of protecting the end of the panel body 10, ensuring a sufficient bonding area, reducing weight, etc. The dimension W1 of this first side piece 14 in the groove depth direction may be, for example, approximately 1.5 to 3 times the thickness dimension of the panel body 10, or approximately 10 mm to 30 mm.

Two first protrusions 15, 15 are provided on the first side piece 14 with a gap in the groove depth direction. In the illustrated example, these two first protrusions 15, 15 include a first protrusion 15 located slightly closer to the groove bottom than the center of the first side piece 14 in the groove depth direction, and a first protrusion 15 located slightly closer to the groove bottom than the groove opening end, which is the tip end in the extension direction of the first side piece 14. These two first protrusions 15, 15 have the same configuration, so one of them will be described below as an example.
The first side surface 15a of the first protrusion 15 facing the groove bottom side is parallel to the groove bottom surface, i.e., is a vertical surface that is approximately perpendicular to the first side piece 14. With this configuration, it is possible to effectively prevent the adhesive 8 applied to the groove bottom side from flowing out toward the groove opening side.
The second side surface 15b of the first protrusion 15, which faces the groove opening, is an inclined surface that slopes toward the groove opening as it moves from the tip end in the protruding direction toward the base end. This configuration allows the end of the panel body 10, which is inserted from the groove opening side, to be smoothly inserted into the groove bottom. In the illustrated example, the first protrusion 15 is substantially triangular when viewed in the longitudinal direction of the held member 11. In other words, the first side surface 15a and the second side surface 15b intersect at a vertex that is the tip end of the first protrusion 15 in the protruding direction.

The protrusion dimension H1 of the first protrusion 15 may be set to an appropriate dimension from the viewpoint of suppressing tilt of the held member 11 relative to the panel body 10 and from the viewpoint of ensuring a gap for forming the adhesive layer 9. The protrusion dimension H1 of the first protrusion 15 may be approximately 0.1 mm to 1.0 mm, and preferably approximately 0.2 mm to 0.5 mm.
The number and shape of the first protrusions 15 provided on the first side piece 14 are not limited to those described above. For example, one first protrusion 15 may be provided on the first side piece 14, or three or more first protrusions 15 may be provided at intervals in the groove depth direction. Furthermore, the protrusion dimension H1 of each of the multiple first protrusions 15 may be increased, for example, toward the groove opening side, or the protrusion dimension H1 of the first protrusion 15 on the groove opening side may be larger than the protrusion dimension H1 of the other first protrusions 15. Various other modifications are possible.

The second side piece 16 is provided to extend in the groove depth direction from the edge of the groove bottom piece 13 on the other side (indoor side) of the receiving groove 12 in the groove width direction. This second side piece 16 is generally plate-shaped, with its thickness direction being the groove width direction of the receiving groove 12. The dimension W2 in the groove depth direction of this second side piece 16 may be set appropriately from the perspectives of protecting the edge of the panel main body 10, ensuring sufficient bonding area, and achieving weight reduction. The dimension W2 in the groove depth direction of this second side piece 16 may be, for example, approximately 1/4 to 3/4 of the dimension W1 in the groove depth direction of the first side piece 14. In the illustrated example, it is set to approximately 1/2 of the dimension W1 in the groove depth direction of the first side piece 14. In the illustrated example, the dimension (W1) in the groove depth direction of the first groove inner wall that forms the groove side surface of the first side piece portion 14 is approximately equal to the dimension (W2) obtained by adding the dimension (W1) in the groove width direction of the groove bottom surface that forms the groove side surface of the groove bottom piece portion 13 to the dimension (W2) in the groove depth direction of the second groove inner wall that forms the groove side surface of the second side piece portion 14. With this configuration, when adhesive 8 is applied in a bead shape to the corner between the first groove inner wall and the groove bottom surface as in the illustrated example, the adhesive 8 tends to spread approximately evenly to the first groove inner wall side, the groove bottom surface side, and the second groove inner wall side.

This second side piece 16 is provided with reservoir grooves 17, 17, 17 at multiple locations in the groove depth direction. With this configuration, the adhesive 8 can be received in these reservoir grooves 17, 17, 17, and the overflow of the adhesive 8 on the second side piece 16 side can be more effectively prevented.
The reservoir groove 17 is formed so as to widen toward the first side piece 14. The slope of the first groove side wall 17a on the groove bottom piece 13 side that defines the reservoir groove 17 is gentler than the slope of the second groove side wall 17b. With this configuration, the reservoir groove 17 can smoothly receive the adhesive 8 that flows from the groove bottom piece 13 side toward the tip end of the second side piece 16. Furthermore, since the reservoir groove 17 can be made shallow while maintaining the volume of the reservoir groove 17, a decrease in the strength of the second side piece 16 can be suppressed.

Specifically, three reservoir grooves 17, 17, 17 are provided in the second side piece 16. These reservoir grooves 17, 17, 17 are provided at equal intervals. In the illustrated example, one of the three reservoir grooves 17, 17, 17 is provided so as to be located slightly closer to the groove bottom than the center in the groove depth direction of the second side piece 16, and the remaining two reservoir grooves 17, 17 are provided so as to be located closer to the groove opening than the center in the groove depth direction of the second side piece 16. These three reservoir grooves 17, 17, 17 have similar configurations, so the following description will be given taking one of them as an example.
The first groove side wall 17a of the reservoir groove 17 is an inclined surface facing the groove opening on the side of the first side piece portion 14. The gradient of this first groove side wall 17a (the gradient with the groove depth direction of the receiving groove 12 as the base and the groove width direction as the height) may be about 10% to 40%, and in the illustrated example is about 20%.
The second groove side wall 17b of the reservoir groove 17 is an inclined surface facing the groove bottom on the side of the first side piece portion 14. The gradient of this second groove side wall 17b (the gradient with the groove depth direction of the receiving groove 12 as the base and the groove width direction as the height) may be approximately 80% to 200%, and is approximately 100% in the illustrated example.

In the illustrated example, the reservoir groove 17 is V-shaped when viewed in the longitudinal direction of the reservoir groove 17. That is, the first groove side wall 17a and the second groove side wall 17b intersect at the bottom of the reservoir groove 17.
The groove depth dimension of this reservoir groove 17, which is in the same direction as the thickness direction of the second side piece 16, may be an appropriate dimension from the standpoint of receiving the adhesive 8 and the strength of the second side piece 16, and may be, for example, approximately 0.1 mm to 0.5 mm.
The number and shape of the reservoir grooves 17 are not limited to those described above, and for example, one or two reservoir grooves 17 may be provided in the second side piece 16, or four or more reservoir grooves 17 may be provided. Furthermore, the reservoir grooves 17 are not limited to a shape that widens toward the first side piece 14, and may be a substantially rectangular groove. Furthermore, instead of a mode in which multiple reservoir grooves 17 having a similar configuration are provided, a mode in which multiple reservoir grooves 17 are provided so that the volume increases toward the groove opening side of the receiving groove 12, and various other modifications are possible.
In addition, an example is shown in which no reservoir groove is provided in the first side piece 14 and only the reservoir groove 17 is provided in the second side piece 16, but a reservoir groove may also be provided in the first side piece 14.

The second side piece 16 is provided with only a second protrusion 18 on the groove opening side. This second protrusion 18 is provided at the tip of the second side piece 16 in the extension direction. The first side surface 18a of this second protrusion 18 facing the groove bottom (groove bottom piece 13) is parallel to the groove bottom surface, i.e., a vertical surface that is approximately perpendicular to the second side piece 16. This configuration effectively prevents adhesive 8 from flowing toward the groove opening side. This second protrusion 18 is approximately rectangular when viewed in the longitudinal direction of the receiving groove 12. In other words, the tip surface of the second protrusion 18 in the extension direction is parallel to the second groove inner wall, which forms the groove side surface of the second side piece 16, and the second side surface of the second protrusion 18 is flush with the tip surface of the second side piece 16 in the extension direction. Alternatively, the second side surface of the second protrusion 18 may be an inclined surface generally similar to that of the first protrusion 15 described above.

The protrusion dimension H2 of the second protrusion 18 may be set to an appropriate dimension from the viewpoint of suppressing tilt of the held member 11 relative to the panel body 10 and from the viewpoint of ensuring a gap for forming the adhesive layer 9. The protrusion dimension H2 of the second protrusion 18 may be 0.05 mm or more, and may be approximately 1/5 to 4/5 of the protrusion dimension H1 of the first protrusion 18.
The dimension in the panel thickness direction (thickness direction of the panel main body 10) from the tip of this second protrusion 18 to the tip of the first protrusion 15 may be the same as the thickness dimension of the panel main body 10, or may be slightly larger than the thickness dimension of the panel main body 10.
The number and shape of the second protrusions 18 provided on the second side piece 16 are not limited to those described above. For example, two or more second protrusions 18 may be provided on the second side piece 16 at intervals in the groove depth direction. The positions of the first protrusions 15 and the second protrusions 18 provided on the first side piece 14 and the second side piece 16 are also not limited to those described above and may be provided at various positions. Furthermore, instead of the configuration in which the protrusion dimension H1 of the first protrusions 18 is larger than the protrusion dimension H2 of the second protrusions 18, these dimensions may be approximately the same, or the protrusion dimension H1 of the first protrusions 18 may be smaller than the protrusion dimension H2 of the second protrusions 18. Furthermore, instead of the configuration in which the first protrusions 15 and the second protrusions 18 are provided on both the first side piece 14 and the second side piece 16, protrusions may be provided on only one of them, or even a configuration in which no protrusions are provided on either of them may be used.

The held member 11 is provided with an engagement recess 19 into which an engagement protrusion 2c (see FIG. 3) provided on the mounting piece 2b of the frame 2a (described later) is inserted. With this configuration, by inserting the engagement protrusion 2c into the engagement recess 19, the pair of frames 2a, 2a suspended and held by the hanging members can be prevented from moving apart by the ceiling panel 1. In addition, the ceiling panel 1 placed and temporarily held on the mounting piece 2b, 2b can be prevented from unintentionally falling.
The engagement recess 19 is positioned outside the receiving groove 12 in the first direction. The engagement recess 19 is open downward and is formed like a groove extending the entire length of the held member 11. The groove depth dimension of the engagement recess 19 in the vertical direction and the groove width dimension in the first direction are appropriately sized to accommodate the engagement protrusion 2c described below. One side of the engagement recess 19 in the groove width direction is defined by the groove bottom piece 13 of the held member 11. The groove bottom of the engagement recess 19 is defined by a bottom piece extending outward in the first direction from a vertical midpoint of the groove bottom piece 13. The other side of the engagement recess 19 in the groove width direction is defined by an outer piece hanging down from the tip of the extending bottom piece. The illustrated example shows an example in which a lower end protrusion protruding outward in the first direction from the lower end of the outer piece. The lower end protrusion is provided so that its lower surface (the interior side surface) is generally flush with the lower surface (the interior side surface) of the second side piece 16. The engagement recess 19 is not limited to the above-described configuration, and may have various other configurations.

The retained member 11 has a receiving recess that receives the shank of a fastener that penetrates the rising piece 2d of the frame 2a (described below). This receiving recess is groove-shaped, opening outward in the first direction (toward the rising piece 2d) and extending the entire length of the retained member 11. The groove depth dimension of this receiving recess in the first direction and the groove width dimension in the vertical direction are appropriately sized to accommodate the shank of a fastener that penetrates the rising piece 2d. One side of the groove width direction of this receiving recess is defined by a bottom piece that defines the groove bottom of the engagement recess 19. The groove bottom of the receiving recess is defined by a groove bottom piece 13 and an extending side piece that extends upward and is connected to it. The other side of the groove width direction of the receiving recess is defined by an upper end protrusion that protrudes outward in the first direction from the upper end of the extending side piece, which is the tip of the extending side piece in the extending direction. The illustration shows an example in which an inner protruding piece is provided that protrudes inward in the first direction from the upper end of the extending side piece.

The thickness of each piece of the member to be held 11 may be set to an appropriate size from the viewpoint of weight reduction and strength, and may be, for example, about 1 mm to 3 mm.
The adhesive 8 used to secure the support member 11 to the end of the panel body 10 may be various adhesives, such as modified silicone adhesives and urethane adhesives. The illustrated example shows a bead-like application to the recessed corner between the first side piece 14 and the groove bottom piece 13 (see FIG. 1( a)). The amount of adhesive 8 applied may be an appropriate amount so as to cover most of the inner walls on both sides of the receiving groove 12 in the groove width direction and not spill over onto the groove opening side. The illustrated example shows an example in which the adhesive layer 9 is formed from the groove bottom side of the first groove inner wall, which forms the groove side surface of the first side piece 14, to the first side surface 15a of the first protrusion 15 on the groove opening side (see FIG. 1( b)). The illustrated example also shows an example in which the adhesive layer 9 is formed from the groove bottom side of the second groove inner wall, which forms the groove side surface of the second side piece 16, to the first side surface 18a of the second protrusion 18 on the groove opening side.

The pair of frames 2a, 2a that hold both side ends in the first direction of the ceiling panel 1 configured as described above are configured to hold the ceiling panel 1 so as to position it higher than the other ceiling panels 7, 7 that are adjacent to it on both sides in the first direction, as shown in Figure 3. These frames 2a, 2a have the same configuration, so one of them will be described below as an example.
The frame 2a is provided with a mounting piece 2b on which a held member 11 constituting the end of the ceiling panel 1 in the first direction is placed, and a rising piece 2d that is provided so as to span in the first direction and to which a connecting member 5 is fixed that abuts against the upper surfaces of the held members 11, 11 on both sides in the first direction. The mounting piece 2b is provided with a raised engaging protrusion 2c that engages with the above-mentioned engaging recess 19 (see FIG. 1). The rising piece 2d is provided so as to rise upward from the outer edge of the mounting piece 2b in the panel width direction. The illustrated example shows an example in which a hanging piece is provided so as to hang downward from the edge of the mounting piece 2b on the center side in the panel width direction.

The frame 2a has an insertion hole through which the hook piece of the hanger 2e constituting the hanging member is inserted, and the suspended portion fixed to the hanger 2e is provided so as to be continuous with the upper side of the rising piece 2d. In the example shown in the figure, an example is shown in which both ends in the first direction are fixed to the suspended portion of the frames 2a, 2a on both sides in the first direction and a spacing member 4 is provided to span the first direction.
The pair of frames 2 a, 2 a that hold both side ends of the ceiling panel 1 in the first direction are not limited to the configuration described above and may have various other configurations. Also, the connecting member 5 and the spacing member 4 may not be provided.
In the above example, the retained member 11 of the ceiling panel 1 is provided with a piece that forms an engagement recess 19 and a piece that forms a receiving recess, but it is sufficient if at least a groove bottom piece 13, a first side piece 14 and a second side piece 16 are provided.
In the above example, the ceiling panel 1 is an equipment mounting panel on which various devices can be mounted, but it may also be a ceiling panel that covers the entire ceiling surface or most of the ceiling surface.
The components constituting the ceiling panel 1 are not limited to the configurations described above, and various other modifications are possible.

<Additional Notes>
The above description of the embodiments discloses the following techniques related to ceiling panels.
<Technology 1>
The ceiling panel includes a panel body and a retained member that is fixed to both ends of the panel body in a first direction, has an elongated shape extending in a second direction perpendicular to the first direction, and is retained on a ceiling substrate. The retained member includes a groove bottom piece that defines the groove bottom of a receiving groove that receives the end of the panel body, a first side piece that defines one side of the receiving groove in the groove width direction, and a second side piece that has a groove depth dimension smaller than the groove depth dimension of the first side piece and defines the other side of the receiving groove in the groove width direction. The second side piece has a reservoir groove for adhesive that secures the retained member to the end of the panel body, the reservoir groove opening toward the first side piece and extending in the second direction.
<Technology 2>
The ceiling panel according to Technology 1, wherein the second side piece has reservoir grooves at multiple locations in the groove depth direction.
<Technology 3>
The ceiling panel according to Technology 1 or Technology 2, wherein the first side piece and the second side piece are provided with protrusions that protrude in directions facing each other and extend in the second direction.
<Technology 4>
A ceiling panel according to Technology 3, wherein the second side piece has a protrusion provided closer to the groove opening than the reservoir groove.
<Technology 5>
A ceiling panel described in Technology 4, in which protrusions are provided on the first side piece at multiple locations in the groove depth direction, and a protrusion on the groove opening side of the second side piece is provided so as to be positioned between two of these protrusions in the groove depth direction.
<Technology 6>
A ceiling panel according to any one of techniques 3 to 5, wherein the protrusion formed on the first side piece has a larger protrusion dimension than the protrusion formed on the second side piece.
<Technology 7>
A ceiling panel according to any one of techniques 1 to 6, wherein the reservoir groove is formed so as to widen as it approaches the first side piece portion.
<Technology 8>
A ceiling panel according to Art 7, wherein the slope of the first groove side wall on the groove bottom piece side that defines the reservoir groove is gentler than the slope of the second groove side wall.

REFERENCE SIGNS LIST 1 ceiling panel 8 adhesive 10 panel body 11 held member 12 receiving groove 13 groove bottom piece 14 first side piece 15 first protrusion (protrusion of first side piece)
16 Second side piece 17 Reservoir groove 17a First groove side wall 17b Second groove side wall 18 Second protrusion (protrusion on the groove opening side of the second side piece)
2 Ceiling base H1 Projection dimension of first protrusion H2 Projection dimension of second protrusion W1 Dimension of groove depth direction of first side piece W2 Dimension of groove depth direction of second side piece

Claims (6)

The panel includes a panel body and a retained member that is fixed to both ends of the panel body in a first direction, has an elongated shape extending in a second direction perpendicular to the first direction, and is retained on a ceiling substrate;
the held member includes a groove bottom piece portion that defines the groove bottom of the receiving groove that receives the end portion, a first side piece portion that defines one side of the receiving groove in the groove width direction, and a second side piece portion that defines the other side of the receiving groove in the groove width direction and has a dimension in the groove depth direction that is smaller than the dimension in the groove depth direction of the first side piece portion,
A ceiling panel characterized in that the second side piece has a groove for retaining adhesive that fixes the held member to the end, the groove opening toward the first side piece and extending in a second direction. In claim 1,
A ceiling panel characterized in that the second side piece has the reservoir grooves formed at a plurality of locations in the groove depth direction. In claim 1,
The first side piece and the second side piece are provided with protrusions that protrude in directions facing each other and extend in a second direction,
The ceiling panel is characterized in that the second side piece portion has the protrusion provided on the groove opening side of the reservoir groove. In claim 3,
A ceiling panel, wherein the protrusion formed on the first side piece has a larger protrusion dimension than the protrusion formed on the second side piece. In claim 3 or 4,
A ceiling panel characterized in that the protrusions are provided at multiple locations in the groove depth direction on the first side piece, and the protrusion on the groove opening side of the second side piece is provided so as to be positioned between two of these protrusions in the groove depth direction. In claim 1,
The ceiling panel is characterized in that the reservoir groove is formed so as to widen as it approaches the first side piece portion, and the slope of the first groove side wall on the groove bottom piece side that defines the reservoir groove is gentler than the slope of the second groove side wall.