Illumination plate holding device and illumination device

Abstract

To provide a lighting plate holding device and a lighting device capable of preventing deformation or damage of the lighting plate when the lighting plate is pushed up from below.SOLUTION: A lighting plate holding device 10 comprises a first set of rail parts 11 located above a ceiling 202 in a car and provided to house a first peripheral edge part 102B of a lighting plate 102 in a first direction A perpendicular to the vertical direction and a first set of clamping parts 12 located above the ceiling 202 and provided to clamp the first peripheral edge part 102B housed in the first set of the rail parts 11. Each of the first set of the rail parts 11 includes a first eaves part 11C which is located above each of the first set of the clamping parts 12 and protrudes further toward the inward of a lighting port 204 than each of the first set of the clamping parts 12. The stiffness of a first eaves part 11C is lower than the stiffness of the lighting plate 102.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a lighting plate holding device that holds a lighting plate that covers a lighting opening formed in a ceiling of a compartment of an elevator car, and a lighting device including the lighting plate holding device. [Background technology]

[0002] In the elevator car, the lighting body that illuminates the room is accommodated above the ceiling of the room, and an opening (hereinafter, a lighting port) is formed in the ceiling of the room to transmit the light emitted by the lighting body into the room. The lighting port is covered by a lighting plate.

[0003] Generally, lighting panels are an element that constitutes the interior design of the car, and some lighting panels are relatively expensive.

[0004] Japanese Patent Laid-Open Publication No. 2001-72357 (Patent Document 1) discloses a car ceiling lighting device that is provided so as to prevent a lighting panel from falling from the ceiling of a room. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-72357 A Summary of the Invention [Problem to be solved by the invention]

[0006] As in the car ceiling lighting device described in Patent Document 1, when a lighting plate fixed to a frame is pushed up from below, stress is applied to the lighting plate, which may cause deformation or damage.

[0007] A primary object of the present disclosure is to provide an illumination plate holding device and an illumination device that can prevent deformation or damage to the illumination plate when the illumination plate is pushed up from below. [Means for solving the problem]

[0008] The lighting plate holding device according to the present disclosure is a lighting plate holding device that holds a lighting plate that closes a lighting hole formed in a ceiling of a room in a car of an elevator apparatus. The lighting plate holding device includes a first set of rail parts that are arranged above the ceiling in the car and are provided to accommodate a first peripheral portion of the lighting plate in a first direction perpendicular to the vertical direction, and a first set of clamping parts that are arranged above the ceiling in the car and clamp the first peripheral portion of the lighting plate accommodated in the first set of rail parts. Each of the first set of rail parts includes a first overhanging part that is arranged above each of the first set of clamping parts and protrudes toward the inside of the lighting hole more than each of the first set of clamping parts. The rigidity of the first overhanging part is lower than the rigidity of the lighting plate. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide an illumination plate holding device and an illumination device that can prevent deformation or damage to the illumination plate when the illumination plate is pushed up from below. [Brief description of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view for explaining an illumination plate holding device and an illumination device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a partial top view taken along the arrow II in FIG. [Diagram 3] 3 is a partial cross-sectional view taken along line III-III in FIG. 2, showing a first state of the illumination plate holding device according to the present embodiment. FIG. [Figure 4] 4 is a partial cross-sectional view taken along line IV-IV in FIG. 2. [Diagram 5] 5 is a partial cross-sectional view showing a second state of the illumination plate holding device according to the embodiment. FIG. [Figure 6] 11 is a partial cross-sectional view showing a third state of the illumination plate holding device according to the embodiment. FIG. [Figure 7]13 is a partial cross-sectional view for explaining deformation of the eave portion caused when a relatively strong force acts vertically from below to above on the illumination plate held by the illumination plate holding device of the present embodiment. FIG. [Figure 8] FIG. 13 is a partial top view of a modified example of the illumination plate holding device according to the embodiment, as viewed from below. [Figure 9] 9 is a partial cross-sectional view taken along line IX-IX in FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0012] Embodiment 1 <Lighting equipment configuration> As shown in FIG. 1, the lighting device 100 according to the first embodiment is a device that illuminates a room 201 of a car 200 of an elevator device from above. The lighting device 100 is disposed above a ceiling 202 of the room 201 and below a top wall 203 of the car 200. The ceiling 202 is formed with a lighting hole 204 penetrating the ceiling 202. The hole axis of the lighting hole 204 is along the vertical direction. The opening shape of the lighting hole 204 may be any shape, for example, a rectangular shape. The lighting hole 204 has a pair of sides extending along a first direction A perpendicular to the vertical direction, and another pair of sides extending along a second direction B perpendicular to both the vertical direction and the first direction A. Hereinafter, the side toward the center of the lighting hole 204 with respect to the comparison object is called the inside, and the side away from the center of the lighting hole 204 with respect to the comparison object is called the outside. The opening shape of the illumination port 204 may be a circle, an ellipse, or any polygonal shape.

[0013] The lighting device 100 includes an illumination body 101, an illumination plate 102, and an illumination plate holding device 10. The illumination body 101 is a light-emitting body that irradiates light toward a living room 201. The illumination body 101 is fixed above an illumination port 204 in a ceiling 202. The illumination plate 102 is provided so as to cover the illumination port 204. The illumination plate 102 has a central portion 102A provided so as to overlap the entire illumination port 204 when viewed from below, and a first peripheral portion 102B arranged so as to sandwich the central portion 102A in a first direction A.

[0014] The central portion 102A protrudes downward, for example, more than the first peripheral portion 102B. In this case, a part of the central portion 102A may protrude downward more than the ceiling 202. The first peripheral portion 102B is disposed above the ceiling 202. The length of the first peripheral portion 102B in the first direction A is shorter than the length of the first peripheral portion 102B in the second direction B, for example. The length of the first peripheral portion 102B in the second direction B is equal to the length of the central portion 102A in the second direction B, for example. Note that the length of the first peripheral portion 102B in the second direction B may be shorter than the length of the central portion 102A in the second direction B, for example.

[0015] The lighting plate 102 is held by the lighting plate holding device 10 in a detachable manner relative to the lighting port 204 .

[0016] The lighting plate holding device 10 is disposed above the ceiling 202 of the room 201 and below the top wall 203 of the car 200. The lighting plate holding device 10 is provided so as to hold a first peripheral portion 102B of the lighting plate 102.

[0017] <Configuration of the lighting plate holding device> As shown in FIGS. 1, 2, and 3, a lighting plate holding device 10 according to the first embodiment includes a first set of rail portions 11 and a first set of clamping portions 12. As shown in FIG.

[0018] The first set of rail portions 11 are disposed to face each other with a gap between them in the first direction A, sandwiching the lighting port 204 and the lighting plate 102. The first set of rail portions 11 are provided symmetrically with respect to a vertical line passing through the center of the lighting port 204 in the first direction A, for example. The first set of rail portions 11 are fixed to the ceiling 202.

[0019] The first set of clamping units 12 are disposed to face each other with a gap therebetween, sandwiching the illumination port 204 and the illumination plate 102 in the first direction A. The first set of clamping units 12 are provided symmetrically with respect to a vertical line passing through the center of the illumination port 204 in the first direction A, for example.

[0020] Each of the first set of rail portions 11 is provided so as to accommodate a first peripheral portion 102B of the illumination plate 102. In a cross section taken along the first direction A, each of the first set of rail portions 11 is provided so as to surround the first peripheral portion 102B of the illumination plate 102 from three sides.

[0021] Each of the first set of rail portions 11 includes an opposing portion 11A, a bottom portion 11B, and an overhanging portion 11C (first overhanging portion).

[0022] The facing portion 11A is disposed to face the first peripheral portion 102B of the illumination plate 102 in the first direction A. The facing portion 11A has a lower end portion connected to an end portion located outside the first direction A of the bottom portion 11B, and an upper end portion connected to an end portion located outside the first direction A of the eaves portion 11C.

[0023] The bottom portion 11B is disposed below the first peripheral portion 102B. The bottom portion 11B has a lower surface 11B1 that is in surface contact with a portion of the upper surface of the ceiling 202 that is located around the lighting port 204, an upper surface 11B2 that is in surface contact with the lower surface 102B1 of the first peripheral portion 102B, and an inner peripheral end surface 11B3 that faces inward in the first direction A and connects the lower surface 11B1 and the upper surface 11B2. The length of the upper surface 11B2 in the first direction A is longer than the length of the lower surface 102B1 of the first peripheral portion 102B, for example. When the lighting plate 102 receives a force acting from one side to the other in the first direction A, the lower surface 102B1 of the first peripheral portion 102B and the lower surface 12C1 of the clamping portion 12 described later slide on the upper surface 11B2. The inner peripheral end surface 11B3 is connected to the inner peripheral surface of the illumination port 204 in the vertical direction, for example.

[0024] The eaves portion 11C is disposed above the first peripheral portion 102B. The eaves portion 11C has a lower surface 11C1 that faces the upper surface 102B2 of the first peripheral portion 102B with a gap therebetween. The distance between the lower surface 11C1 of the eaves portion 11C and the upper surface 11B2 of the bottom portion 11B is longer than, for example, the distance between the lower surface 102B1 and the upper surface 102B2 of the first peripheral portion 102B (i.e., the thickness of the first peripheral portion 102B). From a different perspective, each of the first set of rail portions 11 allows the first peripheral portion 102B to move vertically within a first distance L1 (see FIGS. 3 and 4). The first distance L1 is shorter than, for example, the vertical height of the center portion 102A relative to the first peripheral portion 102B of the illumination plate 102.

[0025] The rigidity of the eaves portion 11C is lower than the rigidity of the illumination plate 102. Here, the rigidity means the degree of resistance to deformation when a force acting upward from below is applied. When the same magnitude of force is applied to each of the eaves portion 11C and the illumination plate 102, the eaves portion 11C is more easily deformed than the illumination plate 102.

[0026] The material constituting the eaves portion 11C is not particularly limited as long as the rigidity of the eaves portion 11C can be lower than the rigidity of the illumination plate 102. The material constituting the eaves portion 11C is, for example, any material having a lower elastic modulus than the material constituting the illumination plate 102. The elastic modulus of the material constituting the eaves portion 11C may be equal to or higher than the elastic modulus of the material constituting the illumination plate 102. In this case, for example, the minimum value of the vertical length (thickness) of the eaves portion 11C is smaller than the minimum value of the vertical length (thickness) of the illumination plate 102, so that the rigidity of the eaves portion 11C can be lower than the rigidity of the illumination plate 102. The eaves portion 11C may be formed of, for example, a leaf spring. The eaves portion 11C may be formed of paper.

[0027] From a different perspective, the overhanging portion 11C is configured to restrict the first peripheral portion 102B from moving beyond the first distance L1 when a relatively weak force acting vertically from below to above acts on the first peripheral portion 102B, and to allow the first peripheral portion 102B from moving beyond the first distance L1 when a relatively strong force acting vertically from below to above acts on the first peripheral portion 102B.

[0028] The opposing portion 11A has a recess 11D formed therein that is recessed toward the surface facing inward in the first direction A. The recess 11D is continuous with an upper surface 11B2 of the bottom portion 11B in the first direction A. The recess 11D is provided so as to accommodate at least a part of a second portion of the contact portion 12A, which will be described later.

[0029] Each of the first set of clamping portions 12 constitutes a pressing portion that presses the first peripheral portion 102B of the illumination plate 102 from the outside toward the inside of the illumination port 204. Each of the first set of clamping portions 12 includes a contact portion 12A and an elastic portion 12B.

[0030] The contact portion 12A is provided so as to be in contact with the first peripheral portion 102B. The contact portion 12A has, for example, a first portion arranged so as to overlap with the elastic portion 12B on the inner side in the first direction A, and a second portion arranged so as to overlap with the elastic portion 12B below the elastic portion 12B in the vertical direction. In a cross section along the first direction A, the cross-sectional shape of the contact portion 12A is, for example, an L-shape.

[0031] The first portion of the contact portion 12A has a first surface 12A1 facing inward in the first direction A and a second surface 12A2 facing outward in the first direction A. A part of the first surface 12A1 is provided so as to be in surface contact with, for example, the outer peripheral surface of the first peripheral portion 102B. The vertical length of the first surface 12A1 is longer than the vertical length of the outer peripheral surface of the first peripheral portion 102B, i.e., the thickness of the first peripheral portion 102B. The second surface 12A2 faces the surface of the opposing portion 11A facing inward in the first direction A.

[0032] The second portion of the contact portion 12A has a third surface 12A3 that faces downward and is in contact with the upper surface 11B2 of the bottom portion 11B. The third surface 12A3 is provided, for example, so as to be in surface contact with the upper surface 11B2 of the bottom portion 11B. The length of the third surface 12A3 in the first direction A is shorter than the length of the upper surface 11B2 of the bottom portion 11B in the first direction A.

[0033] The elastic portion 12B has one end fixed to the facing portion 11A and the other end fixed to the contact portion 12A, and elastically deforms in the first direction A. One end of the elastic portion 12B is fixed to a surface of the facing portion 11A facing inward in the first direction A. The other end of the elastic portion 12B is fixed to the second surface 12A2 of the contact portion 12A. The elastic portion 12B contracted in the first direction A urges the contact portion 12A inward in the first direction A. The elastic portion 12B may be any elastic member, for example, a coil spring. The elastic modulus of the elastic portion 12B in the first direction A is lower than the elastic modulus of the illumination plate 102 in the first direction A. When the same magnitude of force in the first direction A acts on each of the elastic portion 12B and the illumination plate 102, the elastic portion 12B is more easily deformed than the illumination plate 102.

[0034] The illumination plate holding device 10 is switchable between a first state in which the illumination plate 102 is held as shown in Fig. 3 and Fig. 4, and a second state in which the illumination plate 102 is not held as shown in Fig. 5. In the first state, the elastic portions 12B of each of the first set of clamping parts 12 contract in the first direction A to urge the contact portions 12A inward in the first direction A, causing each of the first set of clamping parts 12 to press the first peripheral portion 102B from the outside to the inside of the illumination port 204. As a result, the illumination plate 102 is clamped by the first set of clamping parts 12 and held by the illumination plate holding device 10.

[0035] As shown in FIG. 3, in the first state, the lengths L2 in the first direction A of the elastic portions 12B of the first set of clamping portions 12 are, for example, equal to each other.

[0036] 5, in the second state, the elastic portions 12B of the first pair of clamping portions 12 are not compressed and deformed. In the second state, the lengths L3 in the first direction A of the elastic portions 12B of the first pair of clamping portions 12 are, for example, equal to each other. The length L3 is longer than the length L2. In the second state, the distance in the first direction A between the contact portions 12 of the first pair of clamping portions 12 is shorter than the length in the first direction A of the illumination plate 102.

[0037] The switching from the first state to the second state can be realized, for example, by the following procedure.

[0038] First, the illumination plate 102 is moved from one side to the other side in the first direction A to realize the third state shown in Fig. 6. Specifically, by pushing the illumination plate 102 from one side to the other side in the first direction A, the elastic portion 12B of one of the clamping portions 12 of the first set of clamping portions 12 further contracts from the first state in the first direction A. The elastic portion 12B of the other of the clamping portions 12 of the first set of clamping portions 12 extends from the first state in the first direction A. The length in the first direction A of the elastic portion 12B of the other of the clamping portions 12 in the third state is equal to, for example, the length L3 of the elastic portion 12B in the second state.

[0039] Next, the first peripheral portion 102B on the one side of the lighting plate 102 is pushed upward relative to the first peripheral portion 102B on the other side to tilt the lighting plate 102 relative to the horizontal direction, whereby the first peripheral portion 102B on the other side is taken out below the ceiling 202 through the lighting port 204. Furthermore, by lowering the lighting plate 102, the first peripheral portion 102B on the one side is also taken out below the ceiling 202 through the lighting port 204. In this manner, the second state is achieved from the first state, and the lighting plate 102 is removed from the lighting plate holding device 10.

[0040] Switching from the second state to the first state can be achieved by performing the above procedure in reverse.

[0041] <Effects of the lighting board holding device> The lighting plate holding device 10 includes a first set of clamping sections 12 and is therefore capable of holding the lighting plate 102. Furthermore, the lighting plate holding device 10 includes a first set of rail sections 11 that accommodate a first peripheral edge section 102B of the lighting plate 102 clamped by the first set of clamping sections 12, and each of the first set of rail sections 11 includes an overhanging section 11C. Therefore, the overhanging section 11C can restrict the first peripheral edge section 102B from moving beyond the first distance L1 when a relatively weak force acts on the first peripheral edge section 102B from below to above in the vertical direction. In other words, the lighting plate holding device 10 can prevent the lighting plate 102 from falling.

[0042] Furthermore, in lighting plate holding device 10, the rigidity of eaves portion 11C is lower than the rigidity of lighting plate 102. Therefore, when a relatively strong force acts on lighting plate 102 in the vertical direction from below to above, the force acts on eaves portion 11C via lighting plate 102, resulting in deformation or damage to eaves portion 11C as shown in Fig. 7. Thus, according to lighting plate holding device 10, even when a relatively strong force acts on the held lighting plate 102 in the vertical direction from below to above, the force can be prevented from acting as stress on the interior of lighting plate 102, thereby preventing deformation or damage to lighting plate 102.

[0043] In the illumination plate holding device 10, each of the first set of clamping parts 12 includes an elastic part 12B that elastically deforms in the first direction A, so that the illumination plate 102 can be detachably held.

[0044] In lighting plate holding device 10, contact portions 12A of first set of clamping parts 12 are provided to slide in first direction A relative to bottom part 11B disposed below contact portions 12A, so that the relative position of contact portion 12A with respect to bottom part 11B in the vertical direction can be maintained when elastic portion 12B elastically deforms in first direction A. As a result, in lighting plate holding device 10, attachment and detachment of lighting plate 102 is relatively easy.

[0045] <Modification> The first set of rail portions 11 may be provided so as to limit movement of the illumination plate 102 in the second direction B. The first set of rail portions 11 may further include stopper portions (not shown) that face each of both ends in the first direction A of the first peripheral portion 102B of the illumination plate 102 in the first direction A and are provided so as to interfere with the first peripheral portion 102B of the illumination plate 102 that has moved in the first direction A in the first state.

[0046] As shown in Figures 8 and 9, the peripheral portion of the illumination plate 102 may include a first peripheral portion 102B of the illumination plate 102 in a first direction A perpendicular to the vertical direction, and a second peripheral portion 102C of the illumination plate 102 in a second direction perpendicular to both the vertical direction and the first direction A.

[0047] The length of the first peripheral portion 102B in the second direction B is, for example, shorter than the length of the central portion 102A in the second direction B. The length of the second peripheral portion 102C in the first direction A is, for example, shorter than the length of the central portion 102A in the first direction A. The length of the second peripheral portion 102C in the first direction A is, for example, longer than the length of the second peripheral portion 102C in the second direction B.

[0048] An illumination plate holding device 10 for holding such an illumination plate 102 further includes a second set of rail portions 21 and a second set of clamping portions 22 in addition to a first set of rail portions 11 and a first set of clamping portions 12 .

[0049] The second set of rail portions 21 is disposed above the ceiling 202 and is provided so as to accommodate the second peripheral portion 102C of the lighting plate 102. The second set of clamping portions 22 is disposed above the ceiling 202 and is provided so as to clamp the second peripheral portion 102C of the lighting plate 102 accommodated in the second set of rail portions 21.

[0050] The second set of rail portions 21 have the same configuration as the first set of rail portions 11. Each of the second set of rail portions 21 includes a facing portion 21A, a bottom portion 21B, and an overhanging portion 21C (second overhanging portion). The overhanging portion 21C is disposed higher than each of the second set of clamping portions 22, and protrudes further inwardly of the illumination port 204 than each of the second set of clamping portions 22. The facing portion 21A has a recess 21D formed therein that is recessed toward a surface facing inward in the second direction B.

[0051] The second set of clamping parts 22 has a similar configuration to the first set of clamping parts 12. Each of the second set of clamping parts 22 constitutes a pressing part that presses the second peripheral part 102C of the illumination plate 102 from the outside toward the inside of the illumination port 204. Each of the second set of clamping parts 22 includes a contact part 22A and an elastic part 22B. Each of the second set of clamping parts 22 constitutes, for example, a pressing part that presses the second peripheral part 102C of the illumination plate 102 from the outside toward the inside of the illumination port second direction B.

[0052] Only one of the clamping parts 12 of the first set may constitute the pressing part. The other of the clamping parts 12 of the first set may be fixed to the rail part 11 so as to be immovable in the first direction A. Similarly, only one of the clamping parts 22 of the second set may constitute the pressing part. The other of the clamping parts 22 of the second set may be fixed to the rail part 21 so as to be immovable in the second direction B.

[0053] Although the embodiment of the present disclosure has been described above, the above-mentioned embodiment can be modified in various ways. The scope of the present disclosure is not limited to the above-mentioned embodiment. The scope of the present disclosure is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0054] 10 Lighting plate holding device, 11,21 rail part, 11A,21A opposing part, 11B,21B bottom part, 11B1,11C1,12C1,102B1 bottom face, 11B2,102B2 top face, 11B3 inner peripheral end face, 11C,21C eave part, 11D recess part, 12,22 Holding part, 12A, 22A Contact part, 12A1 1st surface, 12A2 2nd surface, 12A3 3rd surface, 12B, 22B Elastic part, 100 Lighting device, 101 Lighting body, 102 Lighting plate, 102A Center part, 102B 1st peripheral part, 102C 2nd peripheral part, 200 Basket, 201 Living room, 202 Ceiling, 203 ceiling wall, 204 lighting port.

Claims

1. A lighting plate holding device for holding a lighting plate that covers a lighting opening formed in a ceiling of a room of an elevator car, a first set of rail portions disposed above the ceiling in the car and configured to accommodate a first peripheral portion of the lighting plate in a first direction perpendicular to a vertical direction; a first set of clamping parts that are disposed above the ceiling in the car and clamp the first peripheral portion of the lighting panel that is accommodated in the first set of rail parts, Each of the first set of rail portions is disposed higher than each of the first set of clamping portions and includes a first visor portion protruding toward an inside of the lighting port more than each of the first set of clamping portions, The rigidity of the first overhanging portion is lower than the rigidity of the illumination plate, Each of the first set of rail portions further includes an opposing portion that faces the first peripheral portion of the illumination plate in the first direction, At least one of the first pair of clamping portions constitutes a pressing portion that presses the first peripheral portion of the illumination plate from the outside toward the inside of the illumination port, the pressing portion further includes a contact portion that contacts the first peripheral portion of the illumination plate, and an elastic portion that has one end fixed to the facing portion and the other end fixed to the contact portion and that elastically deforms in the first direction, A lighting plate holding device, wherein the elastic modulus of the elastic portion in the first direction is lower than the elastic modulus of the lighting plate in the first direction.

2. A lighting plate holding device for holding a lighting plate that covers a lighting opening formed in a ceiling of a room of an elevator car, a first set of rail portions disposed above the ceiling in the car and configured to accommodate a first peripheral portion of the lighting plate in a first direction perpendicular to a vertical direction; a first set of clamping parts that are disposed above the ceiling in the car and clamp the first peripheral portion of the lighting panel that is accommodated in the first set of rail parts, Each of the first set of rail portions is disposed higher than each of the first set of clamping portions and includes a first visor portion protruding toward an inside of the lighting port more than each of the first set of clamping portions, The rigidity of the first overhanging portion is lower than the rigidity of the illumination plate, Each of the first set of rail portions further includes an opposing portion that faces the first peripheral portion of the illumination plate in the first direction, At least one of the first pair of clamping portions constitutes a pressing portion that presses the first peripheral portion of the illumination plate from the outside toward the inside of the illumination port, the pressing portion further includes a contact portion that contacts the first peripheral portion of the illumination plate, and an elastic portion that has one end fixed to the facing portion and the other end fixed to the contact portion and that elastically deforms in the first direction, Each of the first set of rail portions is disposed lower than each of the first set of clamping portions and further includes a bottom portion protruding toward an inside of the lighting port more than each of the first set of clamping portions; The contact portion is configured to slide relative to the bottom portion in the first direction.

3. A lighting plate holding device for holding a lighting plate that covers a lighting opening formed in a ceiling of a room of an elevator car, a first set of rail portions disposed above the ceiling in the car and configured to accommodate a first peripheral portion of the lighting plate in a first direction perpendicular to a vertical direction; a first set of clamping parts that are disposed above the ceiling in the car and clamp the first peripheral portion of the lighting panel that is accommodated in the first set of rail parts, Each of the first set of rail portions is disposed higher than each of the first set of clamping portions and includes a first visor portion protruding toward an inside of the lighting port more than each of the first set of clamping portions, the first set of rail portions are configured to allow the first periphery to move in the vertical direction within a first distance; a lighting plate holding device, the rigidity of the first eaves portion being set lower than the rigidity of the lighting plate so that, when a predetermined force acting from below to above in the vertical direction acts on the first peripheral portion, the rigidity of the first eaves portion is set lower than the rigidity of the lighting plate so as to restrict the first peripheral portion from moving beyond the first distance, and, when a force acting from below to above in the vertical direction exceeds the predetermined force acting on the first peripheral portion, the rigidity of the first eaves portion being set lower than the rigidity of the lighting plate so as to permit the first peripheral portion to move beyond the first distance.

4. Each of the first set of rail portions is disposed lower than each of the first set of clamping portions and further includes a bottom portion protruding toward an inside of the lighting port more than each of the first set of clamping portions; The lighting plate holding device according to claim 1 , wherein the contact portion is provided so as to slide relative to the bottom portion in the first direction.

5. a second set of rail portions disposed above the ceiling in the car and configured to accommodate a second peripheral portion of the lighting plate in a second direction perpendicular to the vertical direction and the first direction; a second set of clamping parts that are disposed above the ceiling in the car and clamp the second peripheral portion of the lighting panel that is accommodated in the second set of rail parts, Each of the second set of rail portions is disposed higher than each of the second set of clamping portions and includes a second overhang portion protruding toward an inside of the lighting port more than each of the second set of clamping portions, At least one of the second pair of clamping portions constitutes a pressing portion that presses the second peripheral portion of the illumination plate from the outside toward the inside of the illumination port, 5. The illumination plate holding device according to claim 1, wherein the second overhanging portion has a rigidity lower than a rigidity of the illumination plate.

6. A lighting device attached to the ceiling of the living room, an illumination body arranged above the illumination opening; the lighting plate disposed below the lighting body and covering the lighting port; An illumination device comprising: an illumination plate holding device according to any one of claims 1 to 5, which holds the illumination plate.

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