JP2018198162A - Lighting fixture - Google Patents

Abstract

To provide a lighting fixture that is effective in improved uniformity of a display surface and reduced weight.SOLUTION: A lighting fixture 10 has a translucent first panel 14 with a display surface having information written on, a translucent second panel 16 facing the first panel 14 with a display surface having information written on, a cabinet 12 that supports the first panel 14 and the second panel 16, a light source 50 that is provided at one of sides orthogonal to the first panel 14 and the second panel 16 of the cabinet 12, and irradiates the space between the first panel 14 and the second panel 16 with light, and a reflection member 22 provided at another side of the cabinet 12 different from the side at which the light source 50 is provided. The light from the light source 50 is set at a narrow angle, and the reflection member 22 regularly reflects light from the light source 50 toward the side of the light source 50.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a lighting apparatus used for a sign lamp or the like.

  2. Description of the Related Art Conventionally, there are luminaires used as surface light sources for station name display sign lights, sign lights used in stores, buildings, and the like.

  Patent Document 1 discloses a hollow light guide type lighting apparatus including a reflecting member that reflects light from a light source and emits the light outward from the panel in a casing having a light-transmitting panel on both surfaces facing each other in the thickness direction. Disclosure. In particular, the reflecting member here includes the following two reflecting pieces. The first reflecting piece is closer to one panel as it goes from one end side to the other end side in the direction intersecting the thickness direction, and reflects light from the light source to the one panel side. The second reflecting piece is closer to the other panel as it goes from one end side to the other end side in the direction intersecting the thickness direction, and reflects light from the light source to the other panel side. According to such a configuration, the overall lighting fixture can be reduced in weight and thickness while ensuring the uniformity of the display surface on the panel.

JP 2007-80681 A

  Although the lighting fixture disclosed in Patent Document 1 can also ensure the uniformity and realize the weight reduction, in recent years, further improvement of the uniformity and the weight reduction are desired.

  This indication is made in view of the subject which such a prior art has. And the objective of this indication is to provide the lighting fixture advantageous for the improvement of the uniformity of a display surface, weight reduction, etc.

  In order to solve the above-described problem, a lighting fixture according to an aspect of the present disclosure has a translucent first panel in which information is described on a display surface, the first panel facing the first panel, and information on the display surface. Provided on one of the translucent second panel, the casing supporting the first panel and the second panel, and the side surface orthogonal to the first panel and the second panel of the casing. A light source that emits light to a space between the panel and a reflective member that is provided on a side surface that faces the side surface of the housing where the light source is provided, and the light emitted from the light source is set at a narrow angle. The reflection member regularly reflects the light emitted from the light source toward the light source.

  According to the present disclosure, it is possible to provide a lighting apparatus that is advantageous for improving the uniformity of the display surface and reducing the weight.

It is a figure which shows the lighting fixture which concerns on one Embodiment of this indication. It is a figure which shows the II-II cross section in FIG. It is sectional drawing which cut | disconnected the cover contained in a light source unit. It is a light distribution curve figure of a light source unit. It is a figure which shows the measurement position of the illumination intensity set on the display surface of a display panel.

  Hereinafter, this embodiment will be described in detail with reference to the drawings. In the following description, it is assumed that the display surface of the display panel included in the lighting fixture is parallel to the XZ plane. In this case, the Z direction is defined as the vertical direction, and the X direction is defined as the direction perpendicular to the Z direction. . The direction perpendicular to the XZ plane and facing the two display panels is defined as the Y direction. Hereinafter, the Y direction is referred to as a “thickness direction” based on the overall shape of the lighting fixture.

  First, the structure of the lighting fixture which concerns on this embodiment is demonstrated. FIG. 1 is a front view showing a lighting fixture 10 according to the present embodiment. In FIG. 1, for convenience, it is assumed that the first panel 14 of the two display panels opposed in the thickness direction is the front display panel. Moreover, in FIG. 1, in the lighting fixture 10, the part corresponding to the X direction minus side is notched and described, and the internal structure is visible. Moreover, FIG. 2 is a figure which shows the II-II cross section in FIG. However, in FIG. 2, in order to enlarge and display the main part, the drawing of the central region is partially omitted.

  The luminaire 10 is a double-sided luminaire that is provided with a display panel having information display surfaces on both the front side and the rear side and irradiates with a light source from the inside. For example, the luminaire 10 can be adopted as a station name display sign lamp used for displaying a station name at a station.

  The lighting fixture 10 includes a housing 12, a first panel 14, a second panel 16, a light source unit 18, a power supply unit 20, and a reflecting member 22.

  The housing 12 supports the first panel 14 or the second panel 16 on both surfaces facing each other in the thickness direction, and the light source unit 18, the power supply unit 20, and the reflection member 22 are installed therein. The housing 12 is formed in a rectangular parallelepiped shape whose thickness in the thickness direction is smaller than the size of the display surface constituted by the first panel 14 and the second panel 16. The material of the housing 12 can be, for example, a stainless material that is resistant to impact and hardly rusts.

  Specifically, the casing 12 includes a rectangular frame 24 having openings on both sides in the thickness direction, a front plate 26 that closes the opening on the front side of the frame 24, and the rear side of the frame 24. And a rear plate 28 for closing the opening.

  The frame body 24 includes a top plate portion 24a, a bottom plate portion 24b, a first side plate portion 24c, and a second side plate portion 24d. The top plate portion 24a has a rectangular plate shape that is longer than the first side plate portion 24c and the second side plate portion 24d, with the X direction as the longitudinal direction. The bottom plate portion 24b faces the top plate portion 24a in the Z direction, and has a long rectangular plate shape with the X direction as the longitudinal direction, similarly to the top plate portion 24a. The first side plate portion 24c and the second side plate portion 24d are opposed to each other in the X direction, and each has one end suspended from the end portion in the X direction of the top plate portion 24a, with the Z direction as the longitudinal direction. It is a rectangular plate shape connected to the end of the bottom plate portion 24b in the X direction.

  In this embodiment, the lighting fixture 10 shall be fixed to ceiling parts, such as a station platform, from the 1st side board part 24c and the 2nd side board part 24d side. For example, as shown in FIG. 1, two suspension members 100 for attaching the lighting fixture 10 are suspended in advance on the ceiling portion of the station platform. The interval between the suspension members 100 approximately matches the length between the outer surface of the first side plate portion 24c and the outer surface of the second side plate portion 24d. For example, a screw hole (not shown) that allows the bolt 110 to be screwed is formed in the wall portion of the suspension member 100 facing the outer surface of the first side plate portion 24c or the outer surface of the second side plate portion 24d. ing. On the other hand, the first side plate portion 24 c and the second side plate portion 24 d have attachment holes (not shown) through which the bolts 110 can be inserted at positions that match the attachment holes formed in the hanging member 100. With such a configuration, the bolt 110 is inserted into the mounting hole from the inside of the first side plate portion 24c and the second side plate portion 24d and is screwed into the screw hole of the suspension member 100, whereby the first side plate The part 24 c and the second side plate part 24 d are coupled to the suspension member 100. Thereby, the lighting fixture 10 is installed in the predetermined position of the ceiling part of a station platform. The lighting fixture 10 is fixed to the ceiling portion of the station platform or the like from the first side plate portion 24c and the second side plate portion 24d here, but is fixed from the top plate portion 24a side, for example. It may be a thing.

  Further, the frame body 24 may include a support member 70 having one end connected to the top plate portion 24a and the other end connected to the bottom plate portion 24b at an intermediate position in the X direction. The support member 70 is, for example, a metal bar. Looking at the overall shape of the lighting fixture 10, the longer the dimensions in the X direction of the top plate portion 24a and the bottom plate portion 24b, the more the flexure occurs in the top plate portion 24a or the bottom plate portion 24b due to its own weight, and the frame body 24 deforms. There is also a fear. Therefore, such a deformation can be suppressed by providing the support member 70 in advance in the frame body 24 in consideration of the shape and weight of each element constituting the lighting fixture 10.

  The front plate 26 is a plate that holds the first panel 14. The front plate 26 is attached to the frame body 24 via a bolt 30 and a mounting bracket 32 on the upper end side and via a bolt 34 and a mounting bracket 36 on the lower end side. The front plate 26 can be detached from the frame 24 by releasing the fastening of the bolt 30 and the bolt 34 to the frame 24.

  Further, the front plate 26 has a substantially rectangular opening 26 a that exposes the display surface of the first panel 14. The size of the opening 26a is such that when the light source unit 18 and the power supply unit 20 are attached to the inside of the top plate 24a as will be described later, these units are not visible from the outside through the opening 26a. The first panel 14 uses a plurality of combinations of a mounting bracket 42 that presses the first panel 14 against the back surface of the front plate 26 via the cushioning material 40 and a bolt 44 that fixes the mounting bracket 42 to the front plate 26 side. It is attached to the back surface of the front plate 26.

  Further, the front plate 26 has a cutout portion 26b cut out in a shape such as letters, numbers, or marks. As the cutout part 26b, various things such as a company name that employs the lighting fixture 10, a company mark, or a number indicating the installation location of the lighting fixture 10 can be considered. In FIG. 1, a character string “ABC” is adopted as an example of the cutout portion 26b.

  The cutout portion 26b is formed on the same surface as the surface on which the opening portion 26a is formed. Further, when the front plate 26 is attached to the frame body 24, the cutout portion 26 b is formed in a region near the side surface where the light source 50 is installed in the frame body 24. In particular, inside the region, as will be described in detail below, it is desirable that the light regularly reflected by the reflecting member 22 is reachable. Further, the front plate 26 has a light-transmitting plate 46 that covers the cutout portion 26b from the inside. As the material of the translucent plate 46, an acrylic material or the like can be adopted in the same manner as the material of the first panel 14 described below. It is also possible to adhere a part of a character or the like in the shape of the cutout portion 26b to the surface of the light transmitting plate 46.

  The rear plate 28 is a plate body that holds the second panel 16, and its shape and configuration are the same as those of the front plate 26. In particular, the rear plate 28 has an opening 28 a similar to the opening 26 a of the front plate 26. Further, the rear plate 28 includes a cutout portion 28 b similar to the cutout portion 26 b included in the front plate 26 and a light transmission plate 48 similar to the light transmission plate 46 included in the front plate 26.

  Each of the first panel 14 and the second panel 16 is a flat plate member having translucency such as an acrylic material. Here, for example, by using milky white acrylic material, the first panel 14 and the second panel 16 can also serve as a diffusion plate that diffuses the light emitted from the light source unit 18. On the display surfaces of the first panel 14 and the second panel 16, characters indicating the station name of the station where the lighting apparatus 10 is installed, the station names before and after the station, and the like are described.

  The light source unit 18 irradiates light in the space between the first panel 14 and the second panel 16 in the housing 12. The lighting fixture 10 can be said to be a hollow light guide type by adopting a configuration in which the light source unit 18 irradiates light in this way.

  The light source unit 18 includes a plurality of light sources 50, a base 52 on which the plurality of light sources 50 are mounted, a lens 54 that covers each of the plurality of light sources 50, and a cover 56 that covers the entire plurality of light sources 50 including the plurality of lenses 54. including.

  The light source 50 is an LED (light emitting diode). The base 52 arranges a plurality of light sources 50 in a line at a predetermined interval. The light source unit 18 in the present embodiment includes seven light sources 50 as an example. The lens 54 is a narrow angle lens formed of a light transmitting material such as an acrylic material.

  FIG. 3 is a cross-sectional view of the cover 56 taken along the YZ plane so as to pass through the central axis of one lens 54. The cover 56 is formed of a light-transmitting material such as an acrylic material, and extends in the X direction in parallel with the light exit surfaces of the plurality of lenses 54, and one end side is formed on the front wall 56 a. And a side wall 56b connected to the base 52 at the other end. Here, the front wall 56a has a concavo-convex portion 56c formed of a large number of dimples in a region on the outer surface opposite to the inner surface facing the exit surface of the lens 54. The light emitted from the light source 50 is diffused and uniformized by passing through the uneven portion 56c.

  The light source unit 18 irradiates light in a direction parallel to the display surfaces of the first panel 14 and the second panel 16. Therefore, the light source unit 18 is installed in one side of the side surface orthogonal to the first panel 14 and the second panel 16 in the housing 12. Here, the side surface means a surface of any one of the plate portions constituting the frame body 24. Specifically, any of the top plate portion 24a, the bottom plate portion 24b, the first side plate portion 24c, or the second side plate portion 24d. It is the inside. In the present embodiment, as an example, the four light source units 18 are arranged in a row in the X direction on the top plate portion 24a.

  The light source unit 18 is installed on the top plate portion 24 a via the mounting bracket 58 and a plurality of bolts 60. The mounting bracket 58 includes a first plate portion 58a that contacts the light source unit 18, a second plate portion 58b that faces the first plate portion 58a and contacts the top plate portion 24a, and the first plate portion 58a and the second plate. And a third plate part 58c that connects the part 58b in the vertical direction. Here, the second plate portion 58 b is fixed to the top plate portion 24 a by the bolt 60. According to this configuration, the light source unit 18 is suspended from the inner surface of the top plate portion 24a downward in the vertical direction.

  The power supply unit 20 converts alternating current into direct current, and supplies power to the light source 50 that is an LED. The power supply unit 20 is installed in the space between the light source unit 18 and the top plate part 24a, for example. In this case, the power supply unit 20 may be attached together with a mounting bracket 58 for attaching the light source unit 18, or may be attached together with a bolt 60 for fixing the second plate portion 58b to the top plate portion 24a. It may be fixed.

  The reflection member 22 reflects the light emitted from the light source 50 in the direction of the light source 50. Therefore, it is desirable that the reflecting member 22 be installed on the surface facing the side surface on which the light source 50 is installed in the housing 12. Moreover, it is desirable that the reflecting member 22 regularly reflects incident light. Therefore, as the reflecting member 22, for example, a metal plate such as an aluminum plate having a mirror finish on the reflecting surface can be adopted. Alternatively, the reflecting member 22 may be an aluminum tape whose surface is mirror-finished more simply.

  In this embodiment, since the light source unit 18 is installed in the top plate part 24a, the light irradiated from the light source 50 goes to the bottom plate part 24b. Therefore, in this case, the reflecting member 22 is installed on the inner surface of the bottom plate portion 24 b with the reflecting surface facing the light source unit 18, that is, the light source 50.

  Furthermore, the luminaire 10 includes a breaker 62 and a switch 64 for switching on / off the illumination in the housing 12. As above-mentioned, in this embodiment, it is assumed that the lighting fixture 10 is fixed to ceiling parts, such as a station platform. Therefore, it is desirable that the switch 64 is installed on the bottom plate portion 24b so that a part of the switch 64 is exposed to the outside of the lighting fixture 10 so that the operator can easily reach from the upper side of the home. On the other hand, the breaker 62 is either the first side plate portion 24c or the second side plate portion 24d so that the operator can easily reach from the upper side of the home with at least one of the front plate 26 and the rear plate 28 removed. It is desirable to be installed in.

  Here, if the breaker 62 is merely installed on either the first side plate portion 24c or the second side plate portion 24d, the shadow of the shape of the breaker 62 is illuminated during the illumination by the first panel 14 or the second panel. There is a risk of appearing on the 16 display surfaces. Therefore, in order to improve the appearance at the time of illumination, a shielding plate 66 that covers each side surface of the breaker 62 facing the first panel 14 or the second panel 16 is provided in the housing 12. desirable.

  Next, the effect | action of the lighting fixture 10 is demonstrated.

  FIG. 4 is a light distribution curve diagram of the light source unit 18. In FIG. 4, a solid line indicates a case perpendicular to the tube axis, and a broken line indicates a case parallel to the tube axis. The maximum luminous intensity in this case is approximately 7400 (cd / 1000 (lm)). In the light source unit 18, since the light source 50 is an LED and a narrow-angle lens 54 is used, the light source unit 18 realizes medium-angle light distribution as shown in FIG. 4. Therefore, the whole light irradiated from the light source unit 18 goes to the reflecting member 22 at the facing position.

  The lighting fixture 10 uses such a light source unit 18 so that the light emitted from the light source unit 18 travels toward the reflecting member 22 as indicated by an arrow L1 in FIG. Then, the light is regularly reflected by the reflecting surface of the reflecting member 22 and travels toward the light source unit 18 as indicated by an arrow L2 in FIG.

  Next, the effect by the lighting fixture 10 is demonstrated.

  The lighting fixture 10 according to the present embodiment has a translucent first panel 14 on which information is described on the display surface, and a translucent second panel that faces the first panel 14 and has information on the display surface. A panel 16 and a housing 12 that supports the first panel 14 and the second panel 16 are provided. The luminaire 10 is provided on one of the side surfaces orthogonal to the first panel 14 and the second panel 16 of the housing 12, and a light source 50 that irradiates light into a space sandwiched between the first panel 14 and the second panel 16. Is provided. Moreover, the lighting fixture 10 is provided with the reflection member 22 provided in the side surface facing the side surface in which the light source 50 of the housing | casing 12 was provided. The light emitted from the light source 50 is set to a narrow angle. Further, the reflecting member 22 regularly reflects the light emitted from the light source 50 toward the light source 50.

  According to the lighting fixture 10 which concerns on this embodiment, the light irradiated from the light source 50 is first set to a narrow angle because the light source unit 18 implement | achieves medium angle light distribution. In addition, since the reflecting member 22 is installed at a position facing the light source 50 and the reflecting surface of the reflecting member 22 is mirror-finished, the light emitted from the light source 50 is directed to the light source 50 side. It is specularly reflected. Thereby, since the brightness especially in the vicinity of the reflecting member 22 is suppressed, the uniformity of the display surfaces of the first panel 14 and the second panel 16 is improved.

  Secondly, in the luminaire 10, only the reflection member 22 is required as a mechanism for guiding the light emitted from the light source 50. That is, unlike the conventional lighting fixture 10, it is not necessary to install a light guide plate or the like that occupies the same surface area as the first panel 14 or the like, so that the weight can be reduced as compared with the conventional lighting fixture. Moreover, since the reflective member 22 in this embodiment can also employ | adopt an aluminum tape etc., the further weight reduction can be achieved by using such a tape material. Note that the fact that it is not necessary to employ a conventionally used light guide plate or the like leads to a cost reduction accordingly.

  Third, the first and second effects are that the light source unit 18, that is, the light source 50 only needs to be on one side of the housing 12, so that the overall size of the lighting fixture 10 can be made compact. Become.

  Fourth, since an LED is used as the light source 50, energy saving and cost reduction can be achieved as compared with a conventional lighting fixture.

  Moreover, the lighting fixture 10 according to the present embodiment includes a front plate 26 to which the first panel 14 is attached and a rear plate 28 to which the second panel 16 is attached. The front plate 26 or the rear plate 28 has cutout portions 26b and 28b in a region near the side surface on which the light source 50 is installed and in a region where the light regularly reflected by the reflecting member 22 reaches.

  According to the luminaire 10 according to the present embodiment, a specific display that can be visually recognized from the outside can be performed even in a region different from the first panel 14 and the second panel 16. Here, the cut-out portions 26 b and 28 b are irradiated with light from the inside using the light regularly reflected by the reflection member 22. Therefore, for example, the cutout portions 26b and 28b can be arranged in the vicinity where the light source unit 18 and the power supply unit 20 are installed. Therefore, it is not necessary to reduce the size of the first panel 14 and the second panel 16 in order to secure a region for providing the cutout portions 26b and 28b. On the other hand, it is not necessary to increase the overall size of the lighting fixture 10 instead of changing the size of the first panel 14 and the second panel 16 in order to secure the area where the cutout portions 26b and 28b are provided.

  In the above description, one light source unit 18 includes seven light sources 50 in a line at equal intervals, and the entire lighting fixture 10 includes four light source units 18 in a line at equal intervals. It was supposed to be. However, the configuration of the light source unit 18 is not limited to this, and the number and arrangement of the light sources 50 may be appropriately changed depending on the situation.

  Here, in order to explain that the lighting fixture 10 is particularly advantageous in terms of uniformity, the illuminance in the case of the present embodiment and the comparative example in a plurality of regions on the display surface of the first panel 14 and the second panel 16 Were measured and compared.

  FIG. 5 is a schematic diagram showing nine measurement positions from the first region R1 to the ninth region R9 set on the display surface, assuming the display surface of the first panel 14. In FIG. 5, the entire rectangle indicates a shape that assumes the entire side surface of the lighting fixture including the display surface of the first panel 14. In addition, since the same result is obtained under the same conditions for the second panel 16, illustration is omitted. A broken line in FIG. 5 indicates the position of the entire light source unit including the four light source units 18. Moreover, in FIG. 5, the dimension of the position of each area | region R is described as a unit mm.

  Table 1 shows the measurement result of the illuminance in each region R when the color temperature is 6500K according to the present embodiment.

  Table 2 relates to the comparative example, and shows the measurement result of the illuminance in each region R when the color temperature is 6500K. Here, the structure of the lighting fixture for obtaining the measurement result as a comparative example is obtained by deleting the reflecting member 22 from the configuration of the lighting fixture 10 according to the present embodiment.

  First, when the measurement result in the case of the comparative example shown in Table 2 is seen, the lower region away from the light source unit 18, that is, the third region R3, the sixth region R6, or the ninth region R9 has a larger illuminance value. You can see that Further, the difference between the temperature in the area near the light source unit 18 and the temperature in the area away from the light source unit 18 is also large. This measurement result shows that the display surface of the first panel 14 is greatly uneven in brightness, that is, a suitable uniformity is not obtained.

  On the other hand, when the measurement result in the case of this embodiment shown in Table 1 is seen, the illuminance in each region R is approximately constant. This measurement result shows that the display surface of the first panel 14 has little unevenness in brightness, that is, a suitable uniformity is obtained.

  As mentioned above, although preferable embodiment was described, this embodiment is not limited to this, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 12 Case 14 1st panel 16 2nd panel 22 Reflecting member 50 Light source

Claims (2)

A translucent first panel with information on the display surface;
A translucent second panel facing the first panel and having information displayed on the display surface;
A housing that supports the first panel and the second panel;
A light source that is provided on one of the side surfaces orthogonal to the first panel and the second panel of the housing and that irradiates light into a space sandwiched between the first panel and the second panel;
A reflective member provided on a side surface of the housing that faces the side surface provided with the light source;
With
The light emitted from the light source is set at a narrow angle,
The reflecting member regularly reflects the light emitted from the light source toward the light source.
lighting equipment. A front plate for attaching the first panel;
A rear plate for attaching the second panel;
With
The front plate or the rear plate has a cutout portion on a side near the side surface on which the light source is installed and in a region where the light regularly reflected by the reflecting member reaches.
The lighting fixture according to claim 1.

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