JPH05193878A - Lighting plate for elevator cage - Google Patents

Abstract

PURPOSE:To prevent a synthetic resin plate from generating distortion by heat generated by a light source of a ceiling lighting device. CONSTITUTION:Synthetic resin plates 11, 12 are connected to a frame 13 through elastic units 14a, 14b. A lighting plate, for instance, constitutes the synthetic resin plate 11 of an acrylic mirror of applying a predetermined pattern by etching work, synthetic resin plate 12 in a lower side of an acrylic half mirror, frame 13 of an aluminum bar material and the elastic units 14a, 14b of a structural adhesive tape. Accordingly, extension/contraction by heat of the synthetic resin plates 11, 12 is absorbed by the elastic units 14a, 14b, and by maintaining rigidity of a total unit by the frame 13, the lighting plate made look attractive in design can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting plate for an elevator cab, and more particularly to an improvement of the structure of a lighting plate disposed below a lighting fixture of a ceiling lighting device in the elevator cab.

[0002]

2. Description of the Related Art As a conventional lighting plate for an elevator car room of this kind, Japanese Utility Model Laid-Open No. 61-70148 and Japanese Patent Laid-Open No. 62-70148.
The techniques disclosed in JP-A-88793 or JP-A-1-28577 can be mentioned.

FIG. 5 is a sectional view showing an illuminating plate of an elevator cab disclosed in Japanese Patent Laid-Open No. 62-88793.

In the figure, 1 is an upper synthetic resin plate having a pattern printed on its surface by silk screen printing or the like, and 2 is a lower synthetic resin plate having a pattern different from that of the synthetic resin plate 1 printed on its surface. 3 is an edge piece provided around both synthetic resin plates 1 and 4, and 4 is a screw, and the peripheral edge of the lower synthetic resin plate 2 is inserted and fixed to the lower end portion of the edge piece 3, and the upper synthetic By placing the resin plate 1 on the upper end of the edge piece 3 and screwing the screw 4 into the edge piece 3 from above, the two synthetic resin plates 1, 2
Are held at regular intervals by the edge piece 3. In addition, the edge piece 3 is such that the screwed screw 4 cannot be seen from the outside.
It is formed of an opaque molding resin or the like.

The conventional illumination plate of the elevator car room configured as described above is detachably supported below the lighting fixture of the ceiling lighting device of the elevator car room. At this time,
Although the illuminating plate has the synthetic resin plate 1 fixed to the edge piece 3 with the screw 4, the edge piece 3 is formed of an opaque molding resin or the like, so the screw 4 is not visible from the inside of the car, 4 does not impair the design effect.
In addition, since no adhesive is used to fix the synthetic resin plates 1 and 2 to the edge piece 3, there is no problem that the adhesive damages the printing surface of the synthetic resin plates 1 and 2, and the condensation formed inside When wiping off, it can be disassembled by removing the screw 4. Then, the pattern printed on both synthetic resin plates 1 and 2 is visually recognized as a virtual image in the car interior by the light from the luminaire, and a unique design effect by the pattern is achieved.

[0006]

Since the conventional lighting plate for the elevator car room is constructed as described above, the synthetic resin plates 1, 2 are caused by internal stress due to heat from the lighting equipment.
When thermal expansion occurs, the outer peripheral edge portion is fixed to the edge piece 3 having a different linear expansion coefficient to restrain the expansion, so that the synthetic resin plates 1 and 2 are distorted by the thermal expansion, and the distortion is It appears as a warp of the synthetic resin plates 1 and 2, and the space between the synthetic resin plates 1 and 2 is narrower in the central portion than in the vicinity of the outer peripheral edge portion.
As a result, the virtual image due to the printed pattern of the synthetic resin plates 1 and 2 may be distorted, and the design may be unsightly.

Therefore, an object of the present invention is to provide an illuminating plate for an elevator cab that absorbs internal stress due to heat from a light source to prevent distortion and prevents the design plate from warping. It is a thing.

[0008]

According to a first aspect of the present invention, there is provided a lighting plate for an elevator cab, wherein a plurality of design plates are arranged at predetermined intervals in a thickness direction of a frame arranged below a light source of a ceiling lighting device. In the illumination plates arranged to face each other, among the plurality of design plates, at least between the design plate closest to the light source and the frame, elasticity for joining the design plate closest to the light source to the frame. It is something that is inserted through the body.

According to a second aspect of the present invention, there is provided a lighting plate for an elevator cab, wherein a plurality of design plates are arranged at intervals in a vertical direction of a frame horizontally supported by a ceiling lighting device. An elastic body that joins each of the design plates to the frame is interposed between each of the design plates and the frame.

[0010]

According to the first aspect of the present invention, at least the design plate closest to the light source is joined to the frame through the elastic body. Therefore, even when the design plate is thermally expanded by the internal stress due to the heat from the light source, the internal stress is increased. As the elastic body expands and contracts to absorb, distortion and warpage are prevented. Therefore,
The internal stress of the design plate closest to the light source is not transmitted to the lower design plate, and the lower design plate does not follow the distortion and warp.

According to the second aspect of the present invention, the heat from the light source affects all the design plates, and even when each design plate causes internal stress and thermally expands, each design plate is interposed by the elastic body. Since the elastic body is expanded and contracted to absorb the internal stress, distortion and warpage are prevented. In addition, the internal stress of each design plate is not transmitted to other design plates, and the design plates do not mutually follow other design plates to cause distortion and warpage.

[0012]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is a side sectional view of a lighting plate of an elevator cab according to a first embodiment of the present invention. FIG. 2 is a perspective view of an elevator cab using one embodiment of the present invention. FIG. 3 is a sectional view taken along the line AA of FIG.

It should be noted that, in the drawings, the same reference numerals and symbols as those of the conventional example indicate the same or corresponding parts as those of the conventional example, and therefore, redundant description will be omitted here.

In FIG. 1, 11 is a square plate-shaped synthetic resin plate as an upper design plate, and 12 is an upper synthetic resin plate 11
And a square plate-shaped synthetic resin plate as a lower design plate which is vertically opposed to each other at a predetermined interval, and 13 is a rectangular frame-shaped structural frame provided with a predetermined strength. The resin plates 11 and 12 are supported at both upper and lower ends and are held at predetermined intervals so as to maintain the overall rigidity. Reference numeral 14a denotes an upper elastic body that is interposed between the upper synthetic resin plate 11 and the frame 13, and elastically joins the synthetic resin plate 11 to the upper end of the frame 13, and 14b denotes the lower synthetic resin plate 12 and the frame. Thirteen
Is a lower elastic body that is interposed between and and elastically joins the synthetic resin plate 12 to the lower end of the frame 13. For example, the upper synthetic resin plate 11 is an acrylic mirror having a predetermined pattern formed by etching, the lower synthetic resin plate 12 is an acrylic half mirror, the frame 13 is an aluminum rod, and the elastic bodies 14a and 14b are It is composed of structural adhesive tape. In FIG. 2, reference numeral 15 is an elevator car room, 16 is a ceiling lighting device of the elevator car room 15, 17 is a fluorescent lamp as a lighting device which is a light source, 1
Reference numeral 8 is a ceiling joint that supports the lighting plate in the elevator car room of this embodiment. Ceiling joint 18 of the ceiling lighting device 16
In the illustrated example, is configured to detachably support the four illuminator panels of the elevator cab.

In the illumination plate of the elevator cab of the present embodiment constructed as described above, elastic bodies 14a and 14b made of structural adhesive tape are attached to the upper and lower surfaces of a frame 13 made of aluminum rod material, for example. In addition, the elastic bodies 14a and 14b
Synthetic resin plate 11 made of acrylic mirror
By adhering the synthetic resin plate 12 made of acrylic half mirror, the whole is integrated and assembled.
In addition, after assembly, they are respectively placed and supported on the ceiling joints 18 of the ceiling lighting device 16 in the elevator cab 15, and the light from the fluorescent lamp 17 causes a unique virtual image to be seen through the synthetic resin plates 11 and 12. Exerts the design effect of.
Then, in an emergency, the whole structure can be easily removed from the ceiling joint 18 as in the conventional case.

Next, a case where heat is applied from the light source to the illumination plate of the elevator cab of the present embodiment configured as described above will be described with reference to FIG. FIG. 4 is an enlarged sectional view showing a state where the synthetic resin plate is thermally expanded.

First, when the temperature of the upper synthetic resin plate 11 is increased by the heat from the fluorescent lamp 17, the synthetic resin plate 11 is
As indicated by the arrow in the figure, internal stress tends to expand and move in the horizontal direction. At this time, the frame 13 has a linear expansion coefficient different from that of the synthetic resin plate 11, and does not move in the horizontal direction due to thermal expansion together with the synthetic resin plate 11. But,
By the elastic body 14a following the synthetic resin plate 11 and being deformed in the horizontal direction along with the synthetic resin plate 11 and extending,
The expansion due to the internal stress of the synthetic resin plate 11 is absorbed. Even when the lower synthetic resin plate 12 is affected by heat from the fluorescent lamp 17 and expands in the horizontal direction due to internal stress, the elastic body 14b follows the synthetic resin plate 12 in the horizontal direction in the same manner as above. When the synthetic resin plate 12 is deformed and expanded, the expansion due to the internal stress of the synthetic resin plate 12 is absorbed. At this time, the frame 13 maintains the overall rigidity due to its predetermined strength.

As described above, the illumination plate of the elevator cab of the above-described embodiment is composed of two composites at the upper and lower ends of the frame 13 which is horizontally supported by the ceiling joint 18 below the fluorescent lamp 17 of the ceiling lighting device 15. In the illumination plate in which the resin plates 11 and 12 are held separately, the upper synthetic resin plate 11 and the frame 13
The synthetic resin plate 11 between the upper end of the frame 1 and
An elastic body 14a for connecting the synthetic resin plate 12 to the frame 13 and an elastic body 14b for connecting the synthetic resin plate 12 to the frame 13 are interposed between the lower synthetic resin plate 12 and the lower end of the frame 13. Is.

Therefore, in the above embodiment, first, even when the upper synthetic resin plate 11 expands in the horizontal direction due to the internal stress due to the heat from the fluorescent lamp 17 which is the light source, the synthetic resin plate 11 and the frame 13 are separated from each other. Elastic body 14 interposed between
a deforms and expands and follows the synthetic resin plate 11, and absorbs the expansion of the synthetic resin plate 11 due to thermal stress.
The movement of 1 is not restricted by the movement of the frame 13 and the strain is not generated, and the interval between the synthetic resin plates 11 and 12 is maintained in a uniform state in each part. Further, since the thermal stress of the upper synthetic resin plate 11 is not absorbed by the elastic body 14a and is not transmitted to the lower synthetic resin plate 12, the lower synthetic resin plate 1
There is no possibility that 2 will expand following the upper synthetic resin plate 11 and cause distortion or warpage. Further, even when the heat from the fluorescent lamp 17 influences the lower synthetic resin plate 12 and expands the lower synthetic resin plate 12, the lower synthetic resin plate 12 is expanded as in the above case. The expansion is absorbed by the elastic body 14b on the lower side, and no distortion or warpage occurs. As a result, warpage due to distortion occurs and the synthetic resin plate 1
The distance between 1 and 12 differs depending on the part,
It is possible to obtain an illuminating plate that has a good appearance in terms of design without damaging the design effect due to distortion or the like of the virtual image due to 12.

By the way, the design plate of the above embodiment is composed of synthetic resin plates 11 and 12. As an example of the synthetic resin plates 11 and 12, the upper synthetic resin plate 11 is an acrylic mirror and the lower synthetic resin plate 12 is an acrylic mirror. However, when the present invention is carried out, the present invention is not limited to this, and functions so as to transmit the light from the lighting fixture and exert a unique design effect. Any other structure can be adopted, for example, a mirror or a half mirror made of a material other than acrylic resin can be used.

In the above embodiment, the frame 13 is made of aluminum rod material as an example. However, it is possible to use other constructions such as forming the frame 13 by molding synthetic resin. However, when the frame 13 made of aluminum bar material is used, it is possible to suppress the increase in the total weight to the minimum and to increase the strength thereof, as compared with the frame made of synthetic resin. Is obtained.

In the above embodiment, the elastic bodies 14a, 1a
As an example of 4b, a structural adhesive tape is shown, but for example, this is applied to both sides of a soft foamed resin sheet with an adhesive or an adhesive material, and is placed between the frame 13 and the synthetic resin plates 11 and 12. Other configurations, such as interposing and joining, are also possible. However, when the elastic bodies 14a and 14b are made of the structural adhesive tape, the effect of easily and quickly joining the synthetic resin plates 11 and 12 to the frame 13 can be obtained. Furthermore, the elastic body 1
4a and 14b to the frame 13 and the synthetic resin plates 11 and 12
If an adhesive material is used for attaching to the synthetic resin plate 1 when it needs to be disassembled, for example, when dew condensation occurs inside.
The members 1 and 12 can be separated from the frame 13 and easily disassembled against the adhesive force of the elastic bodies 14a and 14b.

Further, in the above embodiment, the case where the two synthetic resin plates 11 and 12 are arranged at the upper and lower ends of the frame 13 via the elastic bodies 14a and 14b, respectively, for example, three or more sheets are provided. It is also possible to arrange it. Alternatively, since the lower synthetic resin plate 12 located far from the light source is less affected by the heat from the light source, when the influence of the heat from the light source can be ignored, the upper synthetic resin plate 11 and the frame 13 are It is also possible to adopt a configuration in which the elastic body 14a is interposed only between the gaps. Even when the elastic body 14a is interposed only in the upper synthetic resin plate 11, the upper synthetic resin plate 11 does not have the thermal stress absorbed by the elastic body 14a to cause distortion and warpage as in the above-described embodiment. Without
And the thermal stress is transmitted to the lower synthetic resin plate 12,
Since the lower synthetic resin plate 12 is not distorted or warped, the virtual image due to the synthetic resin plates 11 and 12 is not distorted, and the design effect is not impaired, and the design is good in appearance. A lighting plate can be obtained.

[0025]

As described above, in the illumination plate for the elevator cab according to the first aspect of the present invention, a plurality of design plates are arranged at predetermined intervals in the thickness direction of the frame arranged below the light source of the ceiling lighting device. In the illumination plates arranged to face each other, among the plurality of design plates, at least between the design plate closest to the light source and the frame, elasticity for joining the design plate closest to the light source to the frame. It is something that is inserted through the body. Therefore, at least the design plate closest to the light source is bonded to the frame via the elastic body, and therefore even when the design plate thermally expands due to the internal stress due to the heat from the light source, the elastic body expands and contracts to absorb the internal stress. This prevents distortion and warpage. Therefore, the internal stress of the design plate closest to the light source is not transmitted to the lower design plate, and the lower design plate does not follow the distortion and warp. As a result, the distance between the design plates varies depending on the parts due to warpage due to distortion, and the design effect is not impaired, and it is possible to obtain an illuminating plate with a good design.

According to a second aspect of the present invention, there is provided a lighting plate for an elevator cab, wherein a plurality of design plates are arranged at intervals in a vertical direction of a frame horizontally supported by a ceiling lighting device. Between each of the design plates and the frame, elastic bodies for joining the design plates to the frame are respectively interposed. Therefore, the heat from the light source affects all the design plates, even when each design plate causes internal stress and thermally expands, since each design plate is bonded to the frame through the elastic body, The elastic body expands and contracts to absorb the internal stress, thereby preventing distortion and warpage. In addition, the internal stress of each design plate is not transmitted to other design plates, and the design plates do not mutually follow other design plates to cause distortion and warpage. As a result, the distance between the design plates varies depending on the parts due to warpage due to distortion, and the design effect is not impaired, and it is possible to obtain an illuminating plate with a good design.

[Brief description of drawings]

FIG. 1 is a side sectional view of a lighting plate of an elevator cab according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an elevator cab that uses one embodiment of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged cross-sectional view showing a state where a synthetic resin plate is thermally expanded.

FIG. 5 is a cross-sectional view showing a conventional illumination plate in an elevator cab.

[Explanation of symbols]

 11 synthetic resin plate (design plate) 12 synthetic resin plate (design plate) 13 frame 14a elastic body 14b elastic body 16 ceiling lighting device 17 fluorescent lamp (light source)

Claims (2)

[Claims] 1. A frame arranged below a light source of a ceiling lighting device, a plurality of design plates facing each other at a predetermined interval in a thickness direction of the frame, and at least one of the plurality of design plates. , Interposed between the design plate closest to the light source and the frame,
An illumination plate for an elevator cab, comprising: an elastic body that joins the design plate closest to the light source to the frame. 2. A frame horizontally supported by a ceiling lighting device, a plurality of design plates arranged at intervals in the vertical direction of the frame, and each of the plurality of design plates and the frame. An illumination plate for an elevator cab, comprising: an elastic body interposed between the design plates and the frame.