JP2018145763A - Ceiling panel and ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling panel capable of forming a ceiling which prevents water from being accumulated thereon and prevents the water from becoming water droplets and falling, and to provide a ceiling which prevents water from being accumulated thereon and prevents the water from becoming water droplets and falling.SOLUTION: A plurality of ceiling panels 1 having first side edges A on one end in a width direction and second side edges B in an opposite side to the first side edge A are aligned in the width direction to form a ceiling; the first side edge A of the ceiling panel 1 is provided with a lower side projection piece 112 which is brought into contact with a lower surface of the side of the second side edge B of the adjacent ceiling panel 1 when the plurality of ceiling panels 1 are aligned and extends to a length direction of the ceiling panel 1; a lower surface of the lower projection piece 112 is used as a part of the lower surface of the ceiling panel 1; and a lower surface of the ceiling panel 1 is formed with a hydrophilic coating film.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ceiling panel that forms a ceiling of a bathroom or the like and a ceiling using the same.

  As a ceiling of a bathroom or the like, for example, one having a plurality of long ceiling panels arranged in the width direction is known. The ceiling has, for example, a structure in which a plurality of ceiling panels are attached to a plurality of parallel field edges.

  On the ceiling of a bathroom or the like, water droplets are generated on the lower surface due to condensation, and the water droplets are likely to fall. Then, in order to make it hard to produce a water droplet by dew condensation etc., forming a hydrophilic film in the lower surface of a ceiling panel is proposed (for example, patent documents 1-5).

JP-A-55-139258 JP 55-139259 A Japanese Unexamined Patent Publication No. 2000-026634 Japanese Patent No. 4373717 JP 2005-02555 A

  However, in a ceiling in which conventional ceiling panels are juxtaposed, water adhering to the hydrophilic coating on the lower surface of the ceiling panel without forming water droplets is formed in groove-shaped joints formed between adjacent ceiling panels. It tends to flow and accumulate. Water collected on the joints between the ceiling panels tends to fall as water droplets.

  The present invention provides a ceiling panel that can form a ceiling in which water is difficult to collect and is difficult to fall as water drops, and a ceiling that is difficult to collect water and is difficult to fall as water drops.

The present invention has the following aspects.
<1> For forming a ceiling by juxtaposing a plurality of ceiling panels having a first side edge at one end in the width direction and a second side edge opposite to the first side edge in the width direction A ceiling panel; extending in a length direction of the ceiling panel that is in contact with a lower surface of a second side edge side of an adjacent ceiling panel when a plurality of ceiling panels are arranged side by side on the first side edge of the ceiling panel; A ceiling panel in which a lower surface of the projecting piece is a part of a lower surface of the ceiling panel; and a hydrophilic film is formed on the lower surface of the ceiling panel.
<2> The ceiling panel according to <1>, wherein the lower surface of the ceiling panel is a downwardly convex curved surface whose top extends in the length direction of the ceiling panel.
<3> On the lower surface of the ceiling panel, one or both of a grooved portion and a stepped portion that extend in the length direction of the ceiling panel and is recessed above the reference surface are formed; the thickness of the hydrophilic coating The ceiling panel according to <1> or <2>, in which the thickness is increased in the concave portion and the step portion than the reference surface.
<4> The ceiling panel according to any one of <1> to <3>, wherein the hydrophilic coating has a thickness of 0.1 μm or more.
<5> The ceiling panel according to any one of <1> to <4>, wherein the hydrophilic coating is a film containing a binder having a hydrophilic group.
<6> The first side edge of the ceiling panel has an engagement recess; the second side edge of the ceiling panel has an engagement projection that engages with the engagement recess; The ceiling panel according to any one of <1> to <5>, wherein the protruding piece on the first side edge of the panel forms part of the engagement recess.
<7> A ceiling in which a plurality of ceiling panels according to any one of <1> to <6> are arranged in parallel in the width direction.
<8> The <7>, wherein the projecting piece of the ceiling panel covers the second side edge of the adjacent ceiling panel so that the hydrophilic coating is continuous between the adjacent ceiling panels. Ceiling.
<9> The ceiling according to <7> or <8>, wherein the ceiling panel is provided so as to be inclined in the length direction.

According to the ceiling panel of the present invention, it is possible to form a ceiling in which water does not easily accumulate and is difficult to fall as water droplets.
In the ceiling of the present invention, it is difficult for water to collect on the lower surface, and it is difficult to fall as water droplets.

It is the end elevation which looked at the ceiling panel of the 1st embodiment of the present invention from the end face side of the length direction. It is an expanded end elevation which shows the boundary vicinity between ceiling panels when the ceiling panel of the 1st Embodiment of this invention is arranged in parallel. It is an expansion perspective view which shows the boundary vicinity between ceiling panels when the ceiling panel of the 1st Embodiment of this invention is arranged in parallel. It is the end elevation which looked at the ceiling panel of the 2nd embodiment of the present invention from the end face side of the length direction. It is an expanded end view which shows the boundary vicinity between ceiling panels when the ceiling panel of the 2nd Embodiment of this invention is arranged in parallel. It is a perspective view which shows an example of the ceiling which arranged the some ceiling panel in parallel.

The following definitions of terms apply throughout this specification and the claims.
The “width direction” is a direction in which the ceiling panels are juxtaposed when a plurality of ceiling panels are juxtaposed to form a ceiling.
The “length direction” is a direction orthogonal to the width direction.
The “reference surface” is a flat surface or a curved surface in a portion where the concave stripe portion or the step portion is not formed on the lower surface of the ceiling panel.

<Ceiling panel>
The ceiling panel of the present invention is for forming a ceiling of a bathroom or the like by arranging a plurality of ceiling panels in the width direction.
The ceiling panel itself may be panel-shaped, and the material, dimensions, basic structure, and the like are not particularly limited.

(Protruding piece)
The ceiling panel of the present invention has a first side edge at one end in the width direction and a second side edge opposite to the first side edge, and the first side edge has a length of the ceiling panel. It has a protruding piece extending in the direction.
The protruding piece contacts the lower surface on the second side edge side of the adjacent ceiling panel when the plurality of ceiling panels are arranged side by side. Moreover, the lower surface of the protruding piece is a part of the lower surface of the ceiling panel. Such a protruding piece serves as a lid that hides the joint between the ceiling panels when a plurality of ceiling panels are arranged side by side.

(Engagement part)
In the ceiling panel of the present invention, it is preferable that an engaging portion that can be engaged with each other is formed on each of the first side edge and the second side edge from the viewpoint that a plurality of ceiling panels are easily arranged side by side. . Moreover, from the point which can utilize a protrusion piece as a part of engaging part, it has an engaging recessed part in a 1st side edge, and has an engaging convex part engaged with an engaging recessed part in a 2nd side edge. The protruding piece on the first side edge preferably forms part of the engaging recess.

(Bottom)
It is preferable that the lower surface of the ceiling panel of the present invention has a downwardly convex curved surface whose top extends in the length direction of the ceiling panel. Since the lower surface of the ceiling panel of the present invention has such a curved surface, water adhering to the lower surface of the ceiling panel gathers at the top of the curved surface (the lowest part) and easily flows toward the wall along the top. Become.

  On the lower surface of the ceiling panel, from the viewpoint of design and the like, either or both of a concave ridge and a step that are recessed above the reference surface and that extend in the length direction of the ceiling panel may be formed. is there.

(Hydrophilic coating)
A hydrophilic film is formed on the lower surface of the ceiling panel of the present invention.
On the surface of the hydrophilic coating, water droplets caused by condensation and the like flow along the lower surface of the ceiling panel, so that falling water hardly occurs. Moreover, a hydrophilic film suppresses the damage | wound of the lower surface of a ceiling panel.

Examples of the hydrophilic coating include organic hydrophilic coatings.
As the organic hydrophilic film, a film containing a binder having a hydrophilic group is preferable because falling water is less likely to be generated due to condensation or the like. Examples of the hydrophilic group include a sulfonic acid group or a salt thereof, a hydroxyl group, a carboxy group or a salt thereof, a poly (oxyalkylene) group, and an ammonium salt.
The hydrophilic film may contain a fungicide, a matte material, and the like. Further, the hydrophilic function may be increased by making the surface of the hydrophilic coating a fine uneven structure.

  Specific examples of the organic hydrophilic coating include a film containing a bifunctional (meth) acrylate polymer having a sulfonic acid group or a salt thereof; a vinyl monomer having an N-methylol group or an N-alkoxymethylol group; Examples include a film containing a polymer of a vinyl monomer having a sulfonic acid group and an alkyl (meth) acrylate monomer; a film containing a polymer having a hydrophilic group and an alkoxysilyl group.

  The thickness of the hydrophilic coating is preferably 0.1 μm or more, more preferably 1.0 to 5.0 μm, and even more preferably 2.5 to 3.5 μm. If the thickness of the hydrophilic coating is not less than the lower limit of the above range, the generation of water droplets due to condensation or the like is sufficiently suppressed. If the thickness of the hydrophilic film is equal to or less than the upper limit of the above range, the hydrophilic film can be easily formed.

  If any one or both of the concave and concave portions extending in the length direction of the ceiling panel and recessed above the reference surface are formed on the lower surface of the ceiling panel, water is applied to the concave and convex portions. But stay. Therefore, the thickness of the hydrophilic coating is preferably thicker at the concave stripes and stepped portions than the reference surface, more preferably 0.1 μm or more, and more preferably 0.2 μm or more. More preferably. By making the hydrophilic film in the concave strip portion and the step portion thick, water remaining in the concave strip portion and the step portion easily flows toward the wall.

The hydrophilic coating is formed by applying a hydrophilic coating agent to the lower surface of the ceiling panel and drying it.
Examples of the coating method of the hydrophilic coating agent include a roll coating method, a spray coating method, a curtain coating method, a flow coating method, a bar coating method, a brush coating, and the like. From the viewpoint of being able to coat, a roll coating method using a sponge roll is preferable.
In order to increase the thickness of the hydrophilic coating on the recess and step, a thick hydrophilic coating agent may be applied to the recess and step. Examples of a method for thickly applying the hydrophilic coating agent to the concave stripe portion and the step portion include a roll coating method and a spray coating method.

(First embodiment)
FIG. 1 is an end view of the ceiling panel according to the first embodiment of the present invention as viewed from the end surface side in the length direction, and FIG. 2 is a view when the ceiling panels of the first embodiment of the present invention are arranged side by side. FIG. 3 is an enlarged perspective view showing the vicinity of the boundary between the ceiling panels when the ceiling panels of the first embodiment of the present invention are arranged side by side.

The ceiling panel 1 has a long panel shape.
The ceiling panel 1 covers a filler 10; a frame 12 that covers the lower surface of the filler 10, both side surfaces in the width direction and both side edges of the upper surface; and a portion of the upper surface of the filler 10 that is not covered by the frame 12. A protective film 14; and a hydrophilic film (not shown) provided on the entire lower surface of the frame 12.

The filler 10 is made of hard foamed urethane or the like and has a shape corresponding to the inner shape of the frame 12. The filler 10 imparts heat insulation and rigidity to the ceiling panel 1.
The frame 12 is formed by extruding a synthetic resin.
The protective film 14 is made of an aluminum vapor deposition film or the like. The protective film 14 enhances the airtightness of the ceiling panel 1 and enhances the heat insulation by the filler 10.

  The frame 12 includes a lower surface plate 102; a first side plate 104 that is bent upward from an end of the lower surface plate 102 on the first side edge A side and extends in the length direction; and a second side edge B side. A second side plate 106 that is bent upward from an end of the lower side plate 102 and extends in the length direction; a long side that extends inward from the middle of the first side plate 104 along the filler 10. A first upper edge plate 108 extending in the length direction; a second upper edge plate 110 extending in the length direction and bent inward from the upper end of the second side plate 106 along the filler 10. A lower protruding piece 112 extending outward from the end of the lower surface plate 102 on the first side edge A side; a long protruding portion 112 extending outward from the upper end of the first side plate 104; An upper projecting piece 114 extending in the length direction; projecting outward from the middle of the second upper edge plate 110 and extending in the length direction And the fixing plate 116; projecting outwardly from the center of the first side plate 104, and a cushion member 118 which extends in the longitudinal direction.

The lower surface of the lower surface plate 102 has a slightly convex curved surface in which a top portion 102 a near the center in the width direction extends in the length direction of the ceiling panel 1.
On the first side edge A side, the center, and the second side edge B side of the lower surface of the lower surface plate 102, a first groove that extends in the length direction of the ceiling panel 1 and is recessed above the reference surface. A portion 202, a second concave portion 204, and a third concave portion 206 are formed.
A lower step portion 208 is formed on the second side edge B side further than the third concave portion 206 on the lower surface of the lower surface plate 102.
An upper step portion 210 is formed on the second side edge B side of the second upper edge plate 110.

The first side edge A is formed with a first engagement recess 302 including a first side plate 104, a lower protruding piece 112, and an upper protruding piece 114.
On the first side edge A, a first engaging convex portion 304 including an upper protruding piece 114 is formed.
On the second side edge B, a second engagement convex portion 306 is formed which includes the second side plate 106, the lower surface plate 102 in the lower step portion 208, and the second upper edge plate 110 in the upper step portion 210. Has been.
The second side edge B is formed with a second engagement recess 308 formed of the second upper edge plate 110 and the fixing plate 116 in the upper step portion 210.
When the plurality of ceiling panels 1 are arranged side by side, as shown in FIGS. 2 and 3, the first engagement concave portion 302 and the second engagement convex portion 306 engage with each other, and the first engagement convex portion 304 and the second engaging recess 308 are engaged with each other.

As shown in FIGS. 2 and 3, the lower protruding piece 112 is a lower surface of the second side edge B of the adjacent ceiling panel 1 when the plurality of ceiling panels 1 are arranged side by side (of the lower step portion 208. Touch the bottom surface. Further, the lower surface of the lower protruding piece 112 is the same as the reference surface and is a part of the lower surface of the ceiling panel 1. For this reason, the lower protruding piece 112 serves as a lid that hides joints between the ceiling panels 1 when a plurality of ceiling panels 1 are arranged side by side.
Further, as shown in FIG. 3, the lower projecting portion 112 is in contact with the lower surface of the lower step portion 208 of the adjacent ceiling panel 1 so that the lower step portion 208 that is not in contact with the lower projecting piece 112 is formed. Looks like a groove.

The fixing plate 116 has a plurality of nail holes (not shown) arranged in the longitudinal direction. When arranging a plurality of ceiling panels 1 in parallel, the ceiling panel 1 can be fixed to the ceiling foundation by nailing the ceiling foundation (such as a field edge) through a nail hole.
The cushion material 118 is a pipe-shaped protrusion having a U-shaped cross section that is made of a soft resin such as soft polyvinyl chloride and that is elastically deformable. Since the cushion material 118 absorbs the movement in the width direction of the ceiling panel 1 when the plurality of ceiling panels 1 are arranged side by side, the ceiling panels 1 can be smoothly arranged side by side.
The hydrophilic coating is thicker in the first concave portion 202, the second concave portion 204, the third concave portion 206, and the lower step portion 208 than the reference surface on the lower surface of the ceiling panel 1.

(Second Embodiment)
FIG. 4 is an end view of the ceiling panel according to the second embodiment of the present invention as viewed from the end surface side in the length direction, and FIG. 5 is a view when the ceiling panel according to the second embodiment of the present invention is juxtaposed. It is an expanded end view which shows the boundary vicinity between the ceiling panels of.

The ceiling panel 2 has a long panel shape.
The ceiling panel 2 covers the filler 20; a frame 22 that covers the lower surface of the filler 20, both side surfaces in the width direction and both side edges of the upper surface; and a portion of the upper surface of the filler 20 that is not covered by the frame 22. A protective film 24; and a hydrophilic film (not shown) provided on the entire lower surface of the frame 22.

The filler 20 is made of hard foamed urethane or the like and has a shape corresponding to the inner shape of the frame 22. The filler 20 imparts heat insulation and rigidity to the ceiling panel 2.
The frame 22 is formed by extrusion molding a synthetic resin.
The protective film 24 is made of an aluminum vapor deposition film or the like. The protective film 24 enhances the airtightness of the ceiling panel 2 and enhances the heat insulation by the filler 20.

  The frame 22 includes a lower surface plate 122; a first side surface plate 124 that is bent upward from an end of the lower surface plate 122 on the first side edge A side; and extends in the length direction; the second side edge B side A second side plate 126 extending in the length direction, bent upward from the end of the lower side plate 122; and a length bent inward from the upper end of the first side plate 124 along the filler 10 A first upper edge plate 128 extending in the direction; a second upper edge plate 130 extending in the lengthwise direction bent inward from the upper end of the second side plate 126 along the filler 10; A first lower projecting piece 132 extending outward from the end of the lower surface plate 122 on the first side edge A side; and projecting outward from the upper end of the first side plate 124; A first central protruding piece 134 extending in the longitudinal direction; protruding upward from the middle of the first central protruding piece 134; A first upper projecting piece 136 having an L-shaped section extending in the length direction and bent outward; projecting outward from the end of the lower surface plate 122 on the second side edge B side; A second lower protruding piece 138 that extends outwardly from the middle of the second side plate 126, a second central protruding piece 140 that extends in the length direction; and from the upper end of the second side plate 126. And a fixing plate 142 extending outward in the length direction.

The lower surface of the lower surface plate 122 has a slightly convex curved surface in which the top portion 122 a near the center in the width direction extends downward in the length direction of the ceiling panel 2.
The lower surface plate 122 is formed with a plurality of concave strip portions 212 that extend in the length direction of the ceiling panel 1 and are recessed above the reference surface.
A step portion 214 is formed on the second side edge B side of the lower surface of the lower surface plate 122.

The first side edge A is formed with a first lower engaging recess 312 including a first side plate 124, a first lower protruding piece 132, and a first central protruding piece 134.
On the first side edge A, a first lower engaging convex portion 314 made of a first central protruding piece 134 is formed.
The first side edge A is formed with a first upper engagement recess 316 including a first center protruding piece 134 and a first upper protruding piece 136.
On the first side edge A, a first upper engagement convex portion 318 made of a first upper protruding piece 136 is formed.

On the second side edge B, a second lower engaging convex portion 320 made of a second lower protruding piece 138 is formed.
On the second side edge B, a second lower engaging recess 322 including a second side plate 126, a second lower protruding piece 138, and a second central protruding piece 140 is formed.
On the second side edge B, a second upper engaging convex portion 324 made of the second central projecting piece 140 is formed.
The second side edge B is formed with a second upper engaging recess 326 made up of the second side plate 126, the second center protruding piece 140, and the fixing plate 142.

  When the plurality of ceiling panels 2 are arranged side by side, as shown in FIG. 5, the first lower engagement protrusion 312 and the second lower engagement protrusion 320 are engaged, and the first lower engagement protrusion is formed. 314 and the second lower engagement recess 322 engage, the first upper engagement recess 316 and the second upper engagement protrusion 324 engage, and the first upper engagement protrusion 318 and The second upper engagement recess 326 engages.

As shown in FIG. 5, the first lower protruding piece 132 is a lower surface on the second side edge B side of the adjacent ceiling panel 2 when the plurality of ceiling panels 2 are arranged side by side (second lower protruding portion). The lower surface of the piece 138). Further, the lower surface of the first lower protruding piece 132 is the same as the reference surface and is a part of the lower surface of the ceiling panel 2. For this reason, the 1st lower side protrusion piece 132 plays the role of the lid | cover which hides the joint between the ceiling panels 2 when the several ceiling panel 2 is arranged in parallel.
Further, as shown in FIG. 5, the first lower protruding piece 132 is in contact with the lower surface of the second lower protruding piece 138 of the adjacent ceiling panel 2 so as to be in contact with the first lower protruding piece 132. The second lower projecting piece 138 and the stepped portion 214 of the portion that does not exist look like a concave portion.

The fixing plate 142 has a plurality of nail holes (not shown) arranged in the longitudinal direction. When the plurality of ceiling panels 2 are arranged side by side, the ceiling panel 2 can be fixed to the ceiling foundation by nailing the ceiling foundation (such as a field edge) through a nail hole.
The hydrophilic coating is made thicker at the concave portions 212 and the step portions 214 than the reference surface on the lower surface of the ceiling panel 2.

(Other embodiments)
The ceiling panel of the present invention extends in the length direction of the ceiling panel that is in contact with the lower surface on the second side edge side of the adjacent ceiling panel when a plurality of ceiling panels are arranged in parallel on the first side edge. The lower surface of the projecting piece is a part of the lower surface of the ceiling panel; any hydrophilic coating may be formed on the lower surface of the ceiling panel, and the invention is not limited to the illustrated example. .
For example, the frame may be a metal frame such as aluminum.
The ceiling panel may be a panel based on a gypsum boat, a resin plate or the like, or may be a hollow panel.

(Mechanism of action)
1. In the ceiling panel of the present invention described above, since a hydrophilic film is formed on the lower surface of the ceiling panel, water droplets generated by condensation and the like flow along the lower surface of the ceiling panel, so that falling water is generated. Hateful.
In the ceiling panel of the present invention, the length direction of the ceiling panel that is in contact with the lower surface on the second side edge side of the adjacent ceiling panel when a plurality of ceiling panels are arranged in parallel on the first side edge And the lower surface of the protruding piece is a part of the lower surface of the ceiling panel. Acts as a lid to hide. Therefore, water adhering to the hydrophilic film on the lower surface of the ceiling panel without forming water droplets does not flow into and accumulate in the groove-shaped joint formed between the adjacent ceiling panels.
From the above, the ceiling panel of the present invention can form a ceiling in which water is difficult to accumulate and is difficult to fall as water droplets.

2. In addition, if the bottom surface of the ceiling panel has a downwardly convex curved surface with the top extending in the length direction of the ceiling panel, water attached to the bottom surface of the ceiling panel gathers at the top of the curved surface and travels along the top to the wall. It becomes easy to flow toward.
3. In addition, in the case where one or both of a grooved portion and a stepped portion that are recessed above the reference surface and extend in the length direction of the ceiling panel are formed on the lower surface of the ceiling panel, the thickness of the hydrophilic coating film However, if it is made thicker in the concave line part and the step part than the reference surface, the water staying in the concave line part and the step part can easily flow toward the wall.

4). Moreover, if the thickness of the hydrophilic coating is 0.1 μm or more, the generation of water droplets due to condensation is sufficiently suppressed.
5. In addition, if the hydrophilic film is a film containing a binder having a hydrophilic group, water droplets are less likely to occur due to condensation or the like.
6). Moreover, it has an engaging recessed part in the 1st side edge of a ceiling panel; It has an engaging convex part engaged with an engaging recessed part in the 2nd side edge of a ceiling panel; If the protruding piece on the side edge forms a part of the engaging recess, a plurality of ceiling panels can be easily arranged, and the protruding piece can be used as a part of the engaging part.

<Ceiling>
The ceiling of the present invention has a plurality of the ceiling panels of the present invention arranged in parallel in the width direction.
FIG. 6 is a perspective view showing an example of a ceiling in which a plurality of ceiling panels are arranged side by side.
The ceiling has a structure in which a plurality of ceiling panels 1 are attached to a ceiling base 402 in parallel. A peripheral edge 406 is provided at the boundary between the upper end of the wall panel 404 and the end of the ceiling panel 1 in the length direction.

  In the ceiling, the protruding piece of the ceiling panel 1 covers the second side edge of the adjacent ceiling panel 1 so that the hydrophilic coating is continuous between the adjacent ceiling panels 1. Therefore, water does not collect between adjacent ceiling panels, and water flows smoothly on the lower surface of the ceiling panel 1.

  The ceiling panel 1 is preferably provided so as to be inclined toward the wall panel 30 so as to descend in the length direction of the ceiling panel 1. By providing the ceiling panel 1 with such an inclination, water attached to the hydrophilic coating on the lower surface of the ceiling panel 1 can easily flow toward the wall. The inclination angle of the ceiling panel 1 is preferably 5 degrees or more with respect to the horizontal, more preferably 15 to 30 degrees.

  In addition, the bottom surface of the ceiling panel 1 has a slightly convex curved surface in which the top portion 102 a near the center in the width direction extends in the length direction of the ceiling panel 1. Gathers at the top 102a (the lowest part) of the curved surface and easily flows along the top 102a toward the wall.

(Other embodiments)
The ceiling of the present invention is not limited to the illustrated example as long as a plurality of the ceiling panels of the present invention are arranged in parallel in the width direction.

(Mechanism of action)
In the ceiling of the present invention described above, a plurality of the ceiling panels of the present invention are arranged side by side in the width direction, so that it is difficult for water to collect on the lower surface, and it is difficult to fall as water droplets.

  The ceiling panel of the present invention is useful as a ceiling panel used for a ceiling of a bathroom or the like.

1 ceiling panel,
2 ceiling panels,
10 Filler,
12 frames,
14 Protective film,
20 filler,
22 frames,
24 protective film,
102 bottom plate,
102a top,
104 first side plate,
106 second side plate,
108 first upper edge plate,
110 second upper edge plate,
112 Lower protruding piece,
114 upper protruding piece,
116 fixing plate,
118 cushion material,
122 bottom plate,
122a top,
124 first side plate,
126 second side plate,
128 first upper edge plate,
130 second upper edge plate,
132 the first lower protruding piece,
134 a first central protruding piece,
136 first upper protruding piece,
138 second lower protruding piece,
140 second central protruding piece,
142 fixing plate,
202 first concave stripe,
204 second concave line part,
206 the third groove,
208 Lower step,
210 Upper step,
212 concave ridge,
214 steps,
302 first engaging recess,
304 first engaging projection,
306 second engaging projection,
308 second engaging recess,
312 first lower engaging recess,
314 a first lower engagement protrusion,
316 a first upper engagement recess,
318 first upper engagement convex portion,
320 second lower engagement convex portion 322 second lower engagement concave portion,
324 second upper engagement convex portion,
326 second upper engagement recess,
402 Ceiling base,
404 wall panels,
406 Around,
A first side edge,
B Second side edge.

Claims (9)

A ceiling panel for forming a ceiling by arranging a plurality of ceiling panels having a first side edge at one end in the width direction and a second side edge opposite to the first side edge in the width direction. Yes,
A projecting piece extending in the length direction of the ceiling panel, which is in contact with the lower surface of the second side edge side of the adjacent ceiling panel when a plurality of ceiling panels are arranged in parallel on the first side edge of the ceiling panel. Have
The lower surface of the protruding piece is a part of the lower surface of the ceiling panel,
A ceiling panel, wherein a hydrophilic film is formed on a lower surface of the ceiling panel.   The ceiling panel according to claim 1, wherein a bottom surface of the ceiling panel has a downwardly convex curved surface whose top extends in a length direction of the ceiling panel. On the lower surface of the ceiling panel, one or both of a recessed strip portion and a step portion that are recessed above the reference surface, extending in the length direction of the ceiling panel, are formed,
The ceiling panel according to claim 1 or 2, wherein a thickness of the hydrophilic coating is made thicker in the concave portion and the step portion than in a reference plane.   The ceiling panel as described in any one of Claims 1-3 whose thickness of the said hydrophilic film is 0.1 micrometer or more.   The ceiling panel as described in any one of Claims 1-4 whose said hydrophilic film is a film | membrane containing the binder which has a hydrophilic group. On the first side edge of the ceiling panel, there is an engagement recess,
On the second side edge of the ceiling panel, there is an engaging convex part that engages with the engaging concave part,
The ceiling panel as described in any one of Claims 1-5 in which the said protrusion piece of the 1st side edge of the said ceiling panel makes a part of said engagement recessed part.   A ceiling in which a plurality of the ceiling panels according to claim 1 are juxtaposed in the width direction.   The ceiling according to claim 7, wherein the projecting piece of the ceiling panel covers the second side edge of the adjacent ceiling panel so that the hydrophilic coating is continuous between the adjacent ceiling panels. .   The ceiling according to claim 7 or 8, wherein the ceiling panel is provided so as to be inclined so as to descend in a length direction thereof.

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