JP2024018215A - ceiling panel - Google Patents

Abstract

To provide a ceiling panel which can make a part of rotatably connecting a panel body to a connection object on a ceiling substrate side inconspicuous, and can suppress separation from a member fixed to the connection object on the ceiling substrate side with a simple structure.SOLUTION: A ceiling panel 1 includes a panel body 10, a panel side member 21 fixed to a rear face 10a side of a first end 11 in a first direction of the panel body, and a substrate side member 25 which is fixed to a connection object 2 on the ceiling substrate side, and rotatably holds the panel side member around an axis perpendicular to the first direction, wherein the substrate side member is provided with an engagement part 27 having a part which is folded back from the end of a part suspended toward the indoor side and extends toward the ceiling substrate side, and the panel side member is provided with an engaged part 23 having an engaged piece part 23b which is folded back from the end of a part raised in the panel's thickness direction, extends to the rear face so as to suppress separation of the engagement part by the rear face of the first end, and is engaged with the engagement part.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to ceiling panels.

2. Description of the Related Art Ceiling panels, such as inspection door panels, have been known in the past, one end of which is rotatably connected to a connection target.
For example, in Patent Document 1 below, an engagement piece is provided upward on a plate part inside the outer frame, and an engagement piece is provided on the outer side of the inner frame that is provided in an opening surrounded by the outer frame so as to be openable and closable. A mounting structure for a ceiling inspection port is disclosed in which an engagement piece rotatably engages with the engagement piece from above. In this attachment part structure, a plate part that stands above the outer frame is provided with a fall-prevention claw that corresponds to an engagement piece of the inner frame.

Japanese Patent Application Publication No. 9-242318

However, in the structure described in Patent Document 1, it is necessary to provide a falling-off prevention claw on the outer frame, and the plate portions on which the engagement pieces of the outer frame and the inner frame are provided are largely exposed on the indoor side. Further improvement is desired.

The present disclosure has been made in view of the above-mentioned circumstances, and it is possible to make the part where the panel main body is rotatably connected to the connection target on the ceiling base side less noticeable, and it is fixed to the connection target on the ceiling base side with a simple structure. It is an object of the present invention to provide a ceiling panel that can suppress detachment from a member that is attached to the ceiling panel.

In order to achieve the above object, the ceiling panel according to the present disclosure includes a panel body, a panel side member fixed to the back side of the first end in the first direction of the panel body, and a connection target on the ceiling base side. a base-side member that is fixed and rotatably holds the panel-side member around an axis orthogonal to the first direction; An engaging portion having a portion that is folded back and extends toward the ceiling base side is provided on the panel side member, and the engaging portion is folded back from the end of the portion that stands up in the thickness direction of the panel and has a portion that extends toward the ceiling base side. An engaged part is provided that extends toward the back surface so as to suppress detachment of the engaging part by the back surface, and has a locked piece part that is locked to the engaging part. It is characterized by

By having the above-described configuration, the ceiling panel according to the present disclosure can make the part where the panel main body is rotatably connected to the connection target on the ceiling base side less conspicuous, and has a simple structure that makes it possible to connect the panel body to the connection target on the ceiling base side. It is possible to suppress detachment from the member fixed to the connection target.

FIG. 1 is a partially cutaway schematic plan view schematically showing a state in which an example of a ceiling panel according to an embodiment of the present disclosure is installed. FIG. 2 is a partially cutaway schematic plan view schematically showing the ceiling panel in a constructed state. (a) is a partially broken schematic vertical cross-sectional view corresponding to the X1-X1 line arrow in FIG. 1, and (b) is a partially broken schematic vertical cross-sectional view corresponding to the X2-X2 line arrow in FIG. It is a diagram. (a) to (c) are partially broken schematic vertical cross-sectional views corresponding to FIGS. 3(a) and (b). (a) is a partially cutaway schematic perspective view of the same ceiling panel, and (b) is a partially cutaway schematic plan view of the same ceiling panel.

Embodiments of the present disclosure will be described below based on the drawings.
In some figures, some detailed symbols attached to other figures are omitted.
In the following embodiment, directions such as the vertical direction will be described with reference to the state in which the ceiling panel according to the present embodiment is installed.
1 to 5 are diagrams schematically showing an example of a ceiling panel according to this embodiment.

As shown in FIGS. 3(a) and 3(b), the ceiling panel 1 according to the present embodiment includes a panel body 10 and a back surface (facing the ceiling base side) of the first end 11 in the first direction of the panel body 10. panel side member 21 fixed to the side) 10a. The ceiling panel 1 includes a base member 25 that is fixed to the edge 2 that constitutes a connection target on the ceiling base side and holds the panel member 21 rotatably around an axis perpendicular to the first direction. With such a configuration, by fixing the base member 25 to the roof edge 2, the ceiling panel 1 can be rotatably connected to the roof edge 2. As a result, while the first end 11 side in the first direction is rotatably connected to the ceiling base side, the second end 12 (see FIG. 1) side in the first direction is fixed to the ceiling base side. can be easily fixed. In addition, as in this example, the second end side of the ceiling panel 1 is removably held against the edge 2 on the ceiling base side to function as an inspection port panel that opens and closes the inspection port 9 (see Figure 2). can be done.

The inspection port 9 may be partitioned by a plurality of other ceiling panels 4, as shown in FIG. The inspection port 9 has a substantially rectangular shape when viewed in the vertical direction (panel thickness direction), which is the opening direction. The inspection opening 9 is provided with two ceiling panels 4, 4 spaced apart in a first direction perpendicular to the vertical direction, and spaced apart in a second direction perpendicular to the vertical direction and the first direction. It is partitioned so as to be surrounded on all four sides by two ceiling panels 4, 4. That is, the inspection opening 9 is partitioned on its four peripheries by the ends of the four ceiling panels 4, 4, 4, 4.
These ceiling panels 4 may be provided at intervals in the first direction, and both end portions in the first direction may be fixed to elongated field edges 2 extending in the second direction. Fixing parts 6 fixed to the roof edge 2 may be provided at both ends of the ceiling panel 4 in the first direction. The fixing portion 6 may be provided on an elongated reinforcing metal fitting provided over the entire second direction so as to reinforce each end of the panel main body of the ceiling panel 4 in the first direction. At both ends of the ceiling panel 4 in the second direction, elongated reinforcing metal fittings are provided over the entire length in the first direction so as to reinforce each end of the panel main body of the ceiling panel 4 in the second direction. 5 may be provided.

The ceiling panel 4 that defines the inspection opening 9 may have the same size as a general ceiling panel. These ceiling panels 4 may have, for example, a dimension in the first direction of about 0.3 m to 1.0 m, and a dimension in the second direction of about 1.2 m to 2.4 m. That is, these ceiling panels 4 may be elongated in the second direction. The illustrated example shows an example in which a long inspection opening 9 is partitioned in the first direction by these ceiling panels 4, but the size and shape of the inspection opening 9 are designed to enable inspection of the space behind the ceiling. , an appropriate size and shape may be used from the viewpoint of downsizing the inspection port 9 and the ceiling panel 1 that opens and closes the same. The panel body of the ceiling panel 4 that partitions the inspection port 9 may have the same layered structure as the panel body 10 of the ceiling panel 1 that constitutes the inspection port panel. The present invention is not limited to the configuration in which the inspection opening 9 is divided by the ends of the four ceiling panels 4 as described above, and various other configurations may be used.

The edge 2 may be a wooden edge, but it may also be made of light iron and constitute what is called a light roof base (steel ceiling base). The field edge 2 may be shaped like a channel steel opening upward, or may have a lip portion formed to be folded back at the upper ends of both side walls. . A plurality of the field edges 2 are arranged in parallel at substantially equal intervals in the first direction (at substantially equal pitches) to form a ceiling base structure. The field edge 2 may be supported by steel field edge supports that are elongated in the first direction and are arranged parallel to each other at approximately equal intervals in the second direction. good. The steel ceiling base may include a field edge joint that joins the field edges 2 adjacent to each other in the longitudinal direction, or a field edge joint that joins the field edges 2 adjacent to each other in the longitudinal direction. Further, the steel ceiling base may be provided with a hanger for suspending and supporting the field edge support, a hanging bolt that is inserted into an insertion hole of the hanger and fixed with a nut, or the like.

The ceiling panel 1 according to this embodiment and the other ceiling panel 4 that partitions the inspection port 9 may be constructed as a ceiling of a relatively small building such as a residence or an office, or may be installed in a gymnasium, a hall, a shopping mall, or a factory. It may also be constructed as the ceiling of various relatively large buildings such as schools.
The panel body 10 of the ceiling panel 1 has a substantially rectangular shape when viewed from above (viewed in the thickness direction). This panel body 10 is elongated in the first direction. The dimension along the first direction and the dimension along the second direction of this panel body 10 correspond to the dimension along the first direction and the dimension along the second direction of the inspection opening 9 so that the inspection opening 9 can be closed. It is said that the dimensions are as follows. The thickness of the panel body 10 may be, for example, about 3.0 mm to 15.0 mm, although it depends on the layer structure and the like.
The panel main body 10 may be made of a gypsum board, a calcium silicate board, or the like, but as shown in FIG. 3, it is configured to include a core material 14 made of foamed resin or fiber. With such a configuration, it is possible to reduce the weight of the panel body 10 compared to a configuration in which the panel body 10 is made of a wooden board, a plasterboard, or the like.

Examples of the foamed resin core material 14 include those formed from resin compositions such as polyurethane resin, polystyrene resin, polyethylene resin, polypropylene resin, phenol resin, and epoxy resin. Examples of the fibrous core material 14 include those formed from mineral fibers such as glass wool and rock wool. In the illustrated example, the core material 14 is a foamed resin layer. This core material 14 occupies most of the panel body 10, and may have a thickness of about 80% to 99% of the thickness of the panel body 10, for example.
A surface layer 15 is provided on one side of the core material 14 in the thickness direction that is the indoor side, and a back layer 16 is provided on the other side of the core material 14 in the thickness direction that is the ceiling base side. The surface layer 15 is provided so as to continuously cover the end surfaces of the core material 14 at both ends in the first direction and the back layer 16 at each end in the first direction.
These front layer 15 and back layer 16 may include a flame retardant layer.

The flame retardant layer as described above may have an appropriate structure so that the ceiling panel 1 satisfies technical standards regarding performance required for noncombustible materials and the like stipulated in the Building Standards Act. For example, the ceiling panel 1 may be configured to meet the criteria for "flame retardant material" in the technical standards, preferably, it may be configured to meet the criteria for "semi-noncombustible material", and even more so. Preferably, the material may be configured to meet the criteria of "noncombustible material." For example, the flame retardant layer may be a metal sheet such as a foil-shaped aluminum sheet made into a thin sheet.
The surface layer 15 and the back layer 16 may be provided with a reinforcing layer containing reinforcing fibers such as glass fibers. The reinforcing layer may be a reinforced fiber sheet such as glass cloth, or a fiber reinforced resin layer such as a glass fiber reinforced resin layer in which a reinforcing fiber sheet is impregnated with resin. The surface of the surface layer 15 (interior side surface) may be a decorative surface that has been subjected to an appropriate surface cosmetic treatment such as pasting a decorative sheet, printing, or painting.

The panel main body 10 of the ceiling panel 1 is arranged so that a hole-shaped gap is formed between the panel main body 10 of the other ceiling panel 4 adjacent in the first direction. As shown in FIG. 3(b), this gap is created when the panel body 10 of the ceiling panel 1 hangs down by rotating approximately 90 degrees with respect to the edge 2 forming the ceiling base. An appropriate size may be used to avoid interference.
As shown in FIGS. 1 and 5(a) and (b), each end 13, 13 in the second direction of the panel body 10 has an end cover piece portion that covers the exposed end surface of the core material 14. Reinforcement fittings 17, 17 are provided. These reinforcing metal fittings 17, 17 are elongated in the first direction of the panel main body 10, and are provided over the entire first direction. These reinforcing metal fittings 17, 17 may have a substantially U-shape (U-shape) when viewed in the longitudinal direction so as to define a receiving groove for receiving each end portion 13, 13 in the second direction of the panel body 10. good. In other words, these reinforcing metal fittings 17, 17 have both side pieces that extend from both side edges in the panel thickness direction of the end cover piece portion toward the panel side and cover both sides in the thickness direction of each end portion 13, 13 of the panel body 10. may be provided. The illustrated example shows an example in which a plurality of elongated holes having a long diameter in the first direction are provided at intervals in the first direction in the side pieces of the reinforcing metal fittings 17, 17 on the ceiling base side. The reinforcing metal fittings 5 of the ceiling panel 4 that partition the above-mentioned inspection opening 9 may have the same configuration as the reinforcing metal fittings 17.

At the second end 12 in the first direction of the panel body 10, a held piece 18 that is detachably held on the field edge 2 is provided. This held piece portion 18 is elongated in the second direction of the panel body 10, is provided over the entire second direction, and constitutes a reinforcing metal fitting that reinforces the second end portion 12 of the panel body 10. . This held piece portion 18 is provided so as to extend outward in the first direction from the end surface of the second end portion 12 . The held piece portion 18 may be fixed to the edge 2 so as to be partially overlapped with the fixed portion 6 of another ceiling panel 4 adjacent in the first direction. The held piece 18 may be fixed to the second end 12 via a fixed piece fixed along the back surface 10a of the second end 12 of the panel body 10. The illustrated example shows an example in which a plurality of elongated holes having a long diameter in the second direction are provided in the fixed piece at intervals in the second direction.
This held piece portion 18 is detachably held by a holding portion 3 provided on the edge 2 . The holding portion 3 may be a female threaded portion into which a screw inserted into an insertion hole provided in the held piece portion 18 and penetrating in the thickness direction of the panel is screwed. The illustrated example shows an example in which an insertion hole into which a screw is inserted is provided approximately at the center of the held piece portion 18 in the second direction.

The holding part 3 has a female screw part provided with a female thread hole into which the screw is rotated and screwed into the insertion part inserted through the insertion hole provided in the indoor side plate part of the field edge 2. A so-called turn nut provided rotatably may also be used. With such a configuration, the female threaded portion can be easily provided on the field edge 2 as a retrofit. The holding portion 3 is not limited to a turn nut, but may be an in-pull nut or a nut attached to the field edge 2 by caulking, welding, or the like. In addition, the holding part 3 that detachably holds the second end of the ceiling panel 1 is not limited to a female screw part to which a screw is screwed, but may also be a lock piece provided on the held piece part 18, etc. It may be a locking portion or the like, or may have various other configurations.

The held piece part 18 is provided with a temporary holding part 19 that temporarily holds the second end side of the ceiling panel 1 to the edge 2. The illustrated example shows an example in which temporary holding parts 19, 19 are provided at both ends of the held piece part 18 in the second direction. These temporary holding parts 19, 19 may be magnets that are attracted to the edge 2. The magnets constituting these temporary holding parts 19, 19 may be configured to be able to hold (temporary hold) the ceiling panel 1 by adsorption to the edge 2. Such a magnet may be a neodymium magnet with a relatively large magnetic force.
Instead of or in addition to such a magnet, the temporary holding part 19 for temporarily holding the second end side of the ceiling panel 1 to the edge 2 may be a hook-and-loop fastener, adhesive material, etc. , a configuration may be adopted in which such temporary holding portion 19 is not provided.

As shown in FIGS. 3 and 4, the panel side member 21 fixed to the first end 11 of the panel body 10 and the base side member 25 fixed to the field edge 2 constitutes a rotary connecting member that rotatably connects to the field edge 2.
The base side member 25 has an extending piece part 27b that is folded back from the end of the hanging piece part 27a that constitutes a part that hangs down toward the indoor side and extends toward the ceiling base side. A joining part 27 is provided. The panel side member 21 is provided with an engaged portion 23 having a rising piece portion 23a that constitutes a portion rising in the thickness direction of the panel. The engaged portion 23 is folded back from the end of the rising piece portion 23a and extends toward the back surface 10 so as to prevent the engaging portion 27 from coming off by the back surface 10a of the first end portion 11. It also has a locked piece portion 23b that is locked to the engaging portion 27. With such a configuration, the ceiling panel 1 can be moved against the edge 2 by engaging the hook-shaped engaging portion 27 of the base side member 25 and the hook-shaped engaged portion 23 of the panel side member 21. It can be rotatably connected with the hinges, and productivity can be improved compared to hinges and the like. Further, since the engaging portion 27 of the base member 25 engages with the engaged portion 23 that is fixed to the back surface 10a side of the first end portion 11 of the panel body 10 and is located on the back surface 10a side, these The engaging portion 27 and the engaged portion 23 become less noticeable on the indoor side. Furthermore, since the engagement part 27 can be prevented from coming off by the back surface 10a of the first end 11 of the panel body 10 and the locked piece part 23b, compared to a structure in which a falling-off prevention claw is separately provided. , the structure can be simplified.

A gap G between the tip end 23c of the locked piece 23b and the back surface 10a of the first end 11 allows the portion of the engaging portion 27 to be received into the receiving recess 24 of the engaged portion 23 through this gap G. It is smaller than the dimension W along the panel thickness direction. With such a configuration, the portion of the engaging portion 27 received in the receiving recess 24 of the engaged portion 23 is located in the gap G between the tip portion 23c of the locked piece portion 23b and the back surface 10a of the first end portion 11. It is possible to effectively suppress desorption through .
A gap G between the tip end 23c of the locked piece 23b and the back surface 10a of the first end 11, and a dimension T along the panel thickness direction of the portion of the engaging portion 27 inserted into the gap G. They may have approximately the same dimensions. With such a configuration, detachment of the engaging portion 27 received in the receiving recess 24 of the engaged portion 23 can be more effectively suppressed. Further, the portion of the engaging portion 27 inserted into the gap G between the tip portion 23c of the locked piece portion 23b and the back surface 10a of the first end portion 11 is connected to the tip portion 23c of the locked piece portion 23b and the first end. Since it can be sandwiched between the rear surface 10a of the portion 11, movement of the panel body 10 in the panel thickness direction with respect to the engaging portion 27 can be suppressed.

When the panel main body 10 is displaced between the horizontal state forming the ceiling surface and the mid-rotation state, the receiving recess of the engaging portion 27 is The bottom portion 28a of 28 serves as the first rotation fulcrum 7 that supports the tip portion 23c of the locked piece portion 23b. When the panel main body 10 is displaced between the mid-rotation state and the hanging state rotated approximately 90 degrees with respect to the ceiling base, the engagement The tip end 27c of the extending piece 27b of the portion 27 serves as a second rotation fulcrum 8 that supports an intermediate portion of the locked piece 23b. With such a configuration, it is possible to make the engaging portion 27 and the engaged portion 23 hook-shaped and prevent them from coming off each other, as described above, but the panel body 10 can be placed approximately against the ceiling base. It can be rotated up to 90 degrees. Here, approximately 90 degrees is not limited to 90 degrees, and may include approximately 80 degrees to 100 degrees.
The hanging piece part 27a of the engaging part 27 is formed in an arc shape so as to suppress interference with the tip part 23c of the locked piece part 23b rotating around the second rotation fulcrum 8. With such a configuration, when the panel body 10 is displaced between the mid-rotation state and the hanging state, the tip portion 23c of the locked piece portion 23b interferes with the hanging piece portion 27a of the engaging portion 27, thereby preventing abnormality. It is possible to suppress generation of noise and deformation of the engaging portion 27, and it is possible to smoothly rotate the panel body 10.

Specifically, as shown in FIG. A reinforcing metal fitting for reinforcing the end portion 11 is configured. With such a configuration, reinforcing metal fittings (reinforcing metal fittings 17, 17, held piece portion 18, and panel side member 21) are provided at the four circumferential ends 11, 12, 13, and 13 of the panel main body 10, The four circumferential ends 11, 12, 13, and 13 of the panel body 10 can be reinforced.
This panel-side member 21 is provided with a fixing piece 22 fixed along the back surface 10a of the first end 11 of the panel body 10. The fixing piece portion 22 has a plate shape whose thickness direction is the panel thickness direction. This fixed piece portion 22 is provided with a plurality of elongated holes having a long diameter in the second direction and spaced apart from each other in the second direction.

At the four corners of the panel main body 10, fixing members 20, 20, 20 are fixed to the panel main body 10 with the reinforcing metal fittings 17, 17, the held piece 18, and the end of the panel side member 21 overlapped at the four corners. , 20 (see also FIGS. 5(a) and 5(b)). This fixing member 20 is attached to a piece inserted into the layer of the panel body 10 at a portion where the ends of the held piece 18 and the panel side member 21 and the ends of the reinforcing metal fittings 17, 17 are overlapped. The panel body 10 may be fixed to the panel body 10 by attaching a fixing tool to the panel body 10 through a piece on the ceiling base side. The illustrated example shows an example in which the reinforcing metal fittings 5 and fixing portions 6 around the four circumferences of the ceiling panel 4 that partition the inspection opening 9 are fixed to the panel body using similar fixing members. In addition to the fixing member 20, the reinforcing metal fittings 17, 17, the fixed piece part of the held piece part 18, and the fixed piece part 22 of the panel side member 21 are fixed to the panel body 10 with a suitable adhesive or adhesive material. You can.

The engaged portion 23 is provided so as to extend outward from the fixed piece portion 22 in the first direction. The engaged portion 23 is arranged so that the engaging portion 27 engaged therewith does not protrude outward in the first direction from the end surface of the first end 11 of the panel body 10. It is provided so as to be located on the inside in the direction (the center side in the first direction of the panel main body 10 in the horizontal state).
The receiving recess 24 of the engaged portion 23 opens toward the back surface 10a of the panel main body 10 and is provided in a groove shape over the entire length of the panel side member 21.
As shown in FIG. 3(a), the rising piece 23a constituting the engaged portion 23 is provided so as to rise from the outer end in the first direction of the fixed piece 22. This rising piece portion 23a is provided so as to rise substantially perpendicularly to the back surface 10a of the panel body 10.
The locked piece part 23b constituting the engaged part 23 is provided so as to extend from the tip end in the rising direction of the rising piece part 23a toward the back surface 10a of the panel body 10 via the bent part. There is. The bent portion is formed in an arc shape that protrudes toward the ceiling base. The locked piece portion 23b is provided in a slightly inclined shape so as to be slightly outward in the first direction toward the back surface 10a of the panel body 10.

A gap G between the tip end 23c of the locked piece 23b and the back surface 10a of the panel body 10, and a dimension T along the panel thickness direction of the engaging portion 27 inserted into the gap G are approximately The same dimensions are not limited to completely the same dimensions. The dimension T along the panel thickness direction of the portion of the engaging portion 27 inserted into the gap G may be understood as the thickness dimension of a piece forming the engaging portion 27. In this case, when the gap G and the dimension T along the panel thickness direction of the portion of the engaging portion 27 inserted through the gap G are approximately the same dimension, it means that the gap G is the portion of the portion that constitutes the engaging portion 27. This may include cases in which the thickness is 1 to 2 times the thickness of the . Preferably, the gap G is such that the tip 23c of the locked piece 23b and the back surface 10a of the panel body 10 are in contact with both sides of the engagement part 27, with the engagement part 27 inserted through the gap G. The dimensions may be as follows. Further, the gap G may be smaller than the thickness of the engagement portion 27 when the engagement portion 27 is not inserted through the gap G. For example, when the piece of the engaging part 27 is not inserted into the gap G, the tip part 23c of the locked piece part 23b may be in close proximity to or in contact with the back surface 10a of the panel body 10.

As shown in FIGS. 1 and 5, the base member 25 is elongated in the second direction of the panel body 10, and is provided over substantially the entirety of the panel body 10 in the second direction.
This base side member 25 is provided with a fixing piece portion 26 that is fixed to the field edge 2. As shown in FIG. 3(a), the fixing piece portion 26 has a plate shape in which the thickness direction is the panel thickness direction when the panel body 10 is in a horizontal state. The fixing piece portion 26 is provided so as to extend outward in the first direction on the ceiling base side of the first end portion 11 when the panel body 10 is in a horizontal state. This fixing piece part 26 is provided with an insertion hole for a fixing tool to be fixed to the field edge 2. This fixing piece portion 26 may be fixed to the edge 2 so as to be partially overlapped with the fixing portion 6 of another ceiling panel 4 adjacent in the first direction.

The engaging portion 27 is provided so as to be connected to the inner side of the fixed piece portion 26 in the first direction. The receiving recess 28 that receives the locked piece 23b of the engaging portion 27 opens toward the ceiling base and is provided in a groove shape over the entire length of the base member 25. This receiving recess 28 is provided so as to open obliquely so as to be slightly inward in the first direction.
The hanging piece part 27a constituting the engaging part 27 is provided so as to hang down from the inner end of the fixed piece part 26 in the first direction. This hanging piece portion 27a has an inclined portion extending diagonally outward in the first direction with respect to the fixed piece portion 26, and an arc-shaped portion extending outward in the first direction and extending downward from the inclined portion. It is equipped with a circular arc part. As shown in FIG. 3(a), when the panel main body 10 is in a horizontal state, the arcuate portion of the engaged portion 23 contacts the inclined portion of the hanging piece portion 27a, and the base side member 25 (and this is fixed). Movement of the panel side member 21 outward in the first direction with respect to the field edge 2) is suppressed.
The arc portion of the hanging piece portion 27a is formed such that the concave curved surface facing inward in the first direction contacts or approaches the tip portion 23c of the locked piece portion 23b that rotates around the second rotation fulcrum 8. .

The extending piece part 27b constituting the engaging part 27 is bent with respect to the tip end in the hanging direction of the hanging piece part 27a, and is provided so as to extend diagonally inward in the first direction. The bent portion between the hanging piece portion 27a and the extending piece portion 27b becomes the bottom portion 28a of the receiving recess 28. This extending piece portion 27b is provided so as to be substantially parallel to the inclined portion of the hanging piece portion 27a. This extending piece portion 27b is always located within the receiving recess 24 of the engaged portion 23 when the panel body 10 rotates between the horizontal state and the hanging state.
When the panel body 10 is in a horizontal state, the bent portion connected to the proximal end side of the extending piece portion 27b fits into the gap G between the tip portion 23c of the locked piece portion 23b of the engaged portion 23 and the back surface 10a of the panel body 10. Positioned so that it is sandwiched in. Further, when the panel main body 10 is in a horizontal state, the extending piece portion 27b is located within the receiving recess 24 of the engaged portion 23. That is, when the panel body 10 is in a horizontal state, the dimension of the extending piece 27b along the panel thickness direction is the dimension W of the engaging portion 27 in the receiving recess 24 of the engaged portion 23 along the panel thickness direction. becomes.

When the panel main body 10 is in a hanging state, as shown in FIG. It is positioned so as to be sandwiched between the gap G and the back surface 10a of the panel body 10. Further, when the panel body 10 is in a hanging state, a part of the circular arc portion of the extending piece 27b and the hanging piece 27a connected thereto is located in the receiving recess 24 of the engaged part 23. In other words, the dimension along the panel thickness direction of a part of the circular arc portion of the extending piece portion 27b and the hanging piece portion 27a connected thereto is the panel thickness of the portion of the engaging portion 27 within the receiving recess 24 of the engaged portion 23. This is the dimension W along the width direction. In addition, when the panel body 10 is in a hanging state, the distal end portion 27c of the extending piece portion 27b abuts the locked piece portion 23b of the engaged portion 23, and the bent portion continuous to the base end side of the extending piece portion 27b is It comes into contact with or comes close to the rising piece portion 23a of the engaged portion 23. Thereby, movement of the panel body 10 in the vertical direction with respect to the base member 25 is suppressed.

When rotating (opening) the panel body 10 from the horizontal state (inspection port 9 closed state), as shown in FIG. The stopper portion 23b rotates around the first rotation fulcrum 7 of the base member 25. When the panel main body 10 is in a half-open state (rotated by about 30 degrees from the horizontal state in the illustrated example), the locked piece 23b of the panel side member 21 is in the extended piece 27b of the base side member 25. The state will be as follows. If the panel main body 10 is further rotated from this state, as shown in FIGS. 4(c) and 3(b), the rotation fulcrum supporting the locked piece portion 23b will rotate from the first rotation fulcrum 7 to the second rotation fulcrum. It moves to the fulcrum 8, and the panel main body 10 is in a hanging state (inspection port 9 is fully open).
Contrary to the above, when rotating (closing) the panel body 10 from the hanging state, as shown in FIGS. 3(b) and 4(c), the locked piece 23b of the panel side member 21 The base side member 25 rotates around the second rotation fulcrum 8. As shown in FIG. 4(b), FIG. 4(a), and FIG. 3(a), if the panel body 10 is further rotated from the above-mentioned mid-rotation state, the rotational fulcrum supporting the locked piece portion 23b moves to the second position. The second rotation fulcrum 8 shifts to the first rotation fulcrum 7, and the panel body 10 becomes horizontal (inspection port 9 closed).

The panel side member 21 and the base side member 25 configured as described above are connected to the base side member 25 through the opening on one side in the second direction of the receiving recess 24 of the panel side member 21 fixed to the back surface 10a of the panel main body 10. The extension piece portion 27b may be slidably engaged in the second direction to be assembled.
At both ends in the second direction of the first end 11 of the panel body 10, as shown in FIGS. Removal prevention portions 17a, 17a are provided to prevent the extension piece portion 27b from coming off in the second direction. The illustrated example shows an example in which the rising pieces provided to stand up at the first ends in the first direction of the reinforcing metal fittings 17, 17 are used as the retaining parts 17a, 17a, but this is not limited to such an example. do not have.
The reinforcing metal fittings 17, 17 provided around the four circumferences of the panel body 10, the held piece portion 18, the panel side member 21, and the base side member 25 are made of appropriate metal materials and are assembled by extrusion molding, pressing, bending, etc. It may be formed into a shape.

In the example described above, the hanging piece portion 27a of the engaging portion 27 is provided with a circular arc portion, but a configuration may be adopted in which such a circular arc portion is not provided.
In the example described above, when the panel main body 10 rotates, the fulcrums that support the locked piece portion 23b shift to the first rotation fulcrum 7 and the second rotation fulcrum 8. Not limited to.
In the above example, both the panel side member 21 and the base side member 25 are provided over almost the entirety of the panel body 10 in the second direction, but one or both of them are provided in the second direction. They may be provided at multiple locations at intervals.
In the above example, the ceiling panel 1 is an inspection port panel whose second end side is removably held against the field edge 2, but the second end side is connected to the field edge 2. It may also be a ceiling panel that is non-removably fixed.
The structure of each part of the ceiling panel 1 according to the above embodiment is not limited to the above-described embodiment, and various other modifications are possible.

1 Ceiling panel 7 First rotation fulcrum 8 Second rotation fulcrum 10 Panel body 10a Back surface 11 First end (first end in first direction)
21 Panel side member 23 Engaged part 23a Standing piece part (portion that stands up in the panel thickness direction)
23b Locked piece part 23c Tip part 24 Receiving recessed part 25 Base side member 27 Engagement part 27a Hanging piece part (portion that hangs down toward the indoor side)
27b Extending piece part (part extending towards the ceiling base side)
27c Tip 28 Receiving recess 28a Bottom 2 Edge (connection target)
G Gap between the tip of the engaged piece and the back surface T Dimension along the panel thickness direction of the part of the engaging part inserted into the gap W Dimension of the part of the engaging part received in the receiving recess of the engaged part Dimension along the panel thickness direction

Claims (5)

A panel main body, a panel side member fixed to the back side of a first end in a first direction of the panel main body, and a panel side member fixed to a connection target on the ceiling base side, and moving the panel side member around an axis perpendicular to the first direction. and a base side member that rotatably holds the base.
The base side member is provided with an engaging portion having a part that is folded back from the end of the part that hangs down toward the indoor side and extends toward the ceiling base side, and the panel side member is provided with an engaging part that has a part that extends toward the ceiling base side. It is folded back from the end of the part that stands up in the horizontal direction and extends toward the back surface of the first end so as to prevent the engagement section from coming off, and is locked to the engagement section. What is claimed is: 1. A ceiling panel characterized in that an engaged portion having a locked piece portion is provided. In claim 1,
A gap between the tip of the locked piece and the back surface of the first end extends along the panel thickness direction of the engaging portion received in the receiving recess of the engaged portion through the gap. A ceiling panel characterized by being smaller than its dimensions. In claim 2,
The gap between the tip of the locked piece and the back surface of the first end is approximately the same as the dimension along the panel thickness direction of a portion of the engaging portion inserted into the gap. A ceiling panel characterized by: In any one of claims 1 to 3,
When the panel main body is displaced between a horizontal state constituting a ceiling surface and a mid-rotation state, the bottom of the receiving recess that receives the locked piece of the engaging part is aligned with the tip of the locked piece. When the panel main body is displaced between the mid-rotation state and the hanging state rotated approximately 90 degrees with respect to the ceiling base, the engaging portion is directed toward the ceiling base side. A ceiling panel characterized in that a distal end of the extending portion serves as a second rotation fulcrum for supporting an intermediate portion of the locked piece portion. In claim 4,
The portion of the engaging portion that hangs down toward the indoor side is formed in an arc shape so as to suppress interference with the tip portion of the locked piece portion that rotates around the second rotation fulcrum. A distinctive ceiling panel.

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