WO2012165190A1 - Illumination device, shelf board unit provided with illumination device, and showcase - Google Patents

Illumination device, shelf board unit provided with illumination device, and showcase Download PDF

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Publication number
WO2012165190A1
WO2012165190A1 PCT/JP2012/062917 JP2012062917W WO2012165190A1 WO 2012165190 A1 WO2012165190 A1 WO 2012165190A1 JP 2012062917 W JP2012062917 W JP 2012062917W WO 2012165190 A1 WO2012165190 A1 WO 2012165190A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
shelf
shelf board
angle
Prior art date
Application number
PCT/JP2012/062917
Other languages
French (fr)
Japanese (ja)
Inventor
佳恵 清水
Original Assignee
コニカミノルタアドバンストレイヤー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタアドバンストレイヤー株式会社 filed Critical コニカミノルタアドバンストレイヤー株式会社
Publication of WO2012165190A1 publication Critical patent/WO2012165190A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0012—Furniture
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F11/00—Arrangements in shop windows, shop floors or show cases
    • A47F11/06—Means for bringing about special optical effects
    • A47F11/10—Arrangements of light sources
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/001—Devices for lighting, humidifying, heating, ventilation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2220/00—General furniture construction, e.g. fittings
    • A47B2220/0075—Lighting
    • A47B2220/0077—Lighting for furniture, e.g. cupboards and racks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F5/00—Show stands, hangers, or shelves characterised by their constructional features
    • A47F5/0043—Show shelves
    • A47F5/0068—Shelf extensions, e.g. fixed on price rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/405—Lighting for industrial, commercial, recreational or military use for shop-windows or displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to an illumination device for a shelf board and a showcase provided with the illumination apparatus.
  • the illumination apparatus suitable for illumination of a product arranged at the tip of the shelf board and displayed on the shelf board, and the illumination device
  • the present invention relates to a shelf unit equipped with a device and a showcase.
  • Fluorescent lamps have been widely used to illuminate products placed in showcases and displayed in showcases.
  • Fluorescent lamps are generally used as illumination by converting electric energy into visible radiation, infrared radiation, and ultraviolet radiation and emitting visible light.
  • heat loss occurs, there is a problem that not only the fluorescent lamp itself but also the displayed product is heated by the radiant heat from the fluorescent lamp, and the light source of the lighting device for the showcase is not necessarily preferable. That's not true.
  • LEDs Light Emitting Diodes
  • the blue LED chip was developed, a white LED light source that emits white light by combining the blue LED chip and a phosphor that is excited by light from the LED chip and emits excitation light of a predetermined wavelength, A white LED light source that synthesizes white light using three primary color LED chips of a blue LED chip, a green LED chip, and a red LED chip has been developed.
  • an LED illumination device provided with this white LED light source is used as the illumination device.
  • an illumination device for display shelves such as showcases
  • LED light sources that consume less power and generate less heat.
  • it is arranged at the end of a shelf board to illuminate products displayed on the shelf.
  • a showcase provided with LED lighting has already been proposed (see, for example, Patent Document 1).
  • a guard installed to prevent the product from falling is composed of a translucent plate material, and light from the LED lighting device is directed from the upper end of the guard to the product on the shelf. Irradiating.
  • the shelf lighting device is required to have uniform illumination with no illuminance unevenness on the product. Moreover, as a lighting device for a shelf board such as a showcase, there is a high possibility that water or dust will be applied depending on the installation location. Moreover, since the guard which is a light guide is exposed to the outside, it is easily damaged. If water droplets, dust, or scratches are attached to the surface of the light guide, light is emitted from the light guide path at that portion, and illumination unevenness occurs, which is not preferable.
  • Patent Document 1 uses a guard for preventing fall as a light guide for the lighting device, the guard is exposed, easily damaged, and easily attached to water and dust. It is not preferable from the viewpoint of waterproofness and dustproofness.
  • the observer since the high-intensity illumination light emitted from the upper end surface of the guard is directed to the observer side, the observer is dazzling and cannot comfortably observe the product.
  • the lighting device that is used by being attached to the tip of a shelf board such as a showcase has a light distribution characteristic that can efficiently illuminate products displayed on the shelf board, and further has a waterproof / dustproof function.
  • it is a shelf unit and a showcase that are not dazzling and can be easily observed, can be easily cleaned without entering water or dust during cleaning, and can be stably illuminated.
  • the present invention has been made in view of the above circumstances, and in an illuminating device that is used by being attached to the tip of a shelf board, a light distribution characteristic capable of efficiently illuminating a product displayed on the shelf board,
  • An object of the present invention is to provide a lighting device having a dust-proof function, and to provide a shelf unit and a showcase that are equipped with this lighting device, can illuminate products with high efficiency, and can stably illuminate without entering water or dust.
  • the present invention provides a light source that is attached to the front end of a shelf board and is arranged along the width direction when viewed from the front of the shelf board, and light emitted from the light source is incident An incident surface, a light guide path for guiding light incident from the incident surface in a direction orthogonal to the width direction, and the guided light is emitted toward a product side displayed on the shelf board.
  • a waterproof cover having a light transmitting property and a waterproof property with an air layer in between, and having an outer surface of the waterproof cover facing the product side
  • the waterproof cover is provided on the first exit surface for illuminating the product side displayed on the shelf board, it is possible to prevent water and dust from entering the light source section and the inside of the apparatus.
  • the light guide path is formed by the first surface and the second surface of the light guide, the light can be guided to the exit surface while being totally reflected by the first surface and the second surface. Can be guided and ejected with high efficiency.
  • tilting the waterproof cover toward the product side which is larger than the Brewster angle of the cover material, it is possible to control the light distribution toward the product side with high efficiency, and to display the product displayed on the shelf board. It is possible to efficiently illuminate and reduce the light traveling toward the viewer. Therefore, it is possible to obtain an illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on a shelf board and a waterproof / dustproof function.
  • the angle ⁇ 2 formed by the light guide direction guided through the light guide path and the perpendicular of the first emission surface is greater than the Brewster angle, It is characterized by tilting to the product side.
  • the waterproof cover but also the light guide light exit surface is inclined more efficiently than the Brewster angle by tilting the cap member to the product side, so that products displayed on the shelf board can be made more efficient. And the glare when the observer observes the product can be further reduced.
  • a first reflective surface is provided outside the first surface with an air layer interposed therebetween, and a second reflective surface is provided outside the second surface with an air layer interposed therebetween. It is a feature. According to this configuration, light emitted outside the total reflection condition in the light guide path can be returned to the light guide path and efficiently guided to the exit surface.
  • the ⁇ 1 and ⁇ 2 are smaller than 80 °. According to this configuration, if ⁇ 1 and ⁇ 2 are larger than 80 °, it is necessary to increase the vertical width of the exit surface with respect to the vertical width of the accompanying path. Therefore, ⁇ 1 and ⁇ 2 are made smaller than 80 °. Thus, the size of the lighting device can be made compact.
  • the present invention is characterized in that, in the illumination device configured as described above, the angle ⁇ 2 is larger than the angle ⁇ 1, and a housing for holding the waterproof cover is disposed in the formed space. According to this configuration, the waterproof cover can be attached to the housing and sealed so that water and dust do not enter inside, and the waterproof property can be improved.
  • the present invention is characterized in that in the plate illumination device having the above-described configuration, a diffusion portion having a predetermined diffusion characteristic is provided in a region of the first surface close to the first emission surface. According to this configuration, since the light flux immediately before emission is diffused within a predetermined range and reflected toward the emission surface, uniform illumination light can be generated. That is, the light can be guided with high efficiency while maintaining the light distribution characteristic, and uniform illumination light can be emitted.
  • this invention is an illuminating device of the said structure, WHEREIN:
  • the said light guide is equipped with the optical path branch part which branches the light from the said light source into two different directions, and uses the said light as said 1st emission surface as the said light guide path
  • the upper side of the shelf board can be illuminated via the first light guide path, and the lower side of the shelf board can be illuminated via the second light guide path. That is, it is possible to realize an illumination device that can simultaneously illuminate the top and bottom of the shelf board.
  • the waterproof cover provided on the upper side can prevent water and dust from entering.
  • the light guide is divided into a plurality of width directions when viewed from the front of the shelf, and the waterproof cover is integrally formed in the width direction. It is a feature. According to this configuration, the light guide can be manufactured as an assembly having a predetermined width, so that the manufacturing cost can be reduced. Moreover, since the waterproof cover is integrated in the longitudinal direction (the width direction when observed from the front of the shelf board), it is possible to sufficiently prevent water and dust from entering from the gap between the light guides.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, the light source includes a plurality of LED light sources disposed along a width direction when observed from the front of the shelf board. According to this configuration, it is possible to realize a highly efficient lighting device with high illuminance, low power consumption, and low heat generation.
  • the present invention is characterized in that it is a shelf unit provided with the lighting device at the tip. According to this configuration, it is possible to obtain a shelf unit that is not dazzling, can illuminate the product with high efficiency, does not enter water and dust, and can be illuminated stably.
  • the present invention is characterized in that it is a showcase provided with a plurality of the shelf unit. According to this configuration, it is possible to obtain a showcase that can illuminate products displayed on a plurality of shelves with high efficiency and that can stably illuminate without entering water or dust.
  • the waterproof cover having translucency and waterproofness is provided on the first exit surface that emits illumination light toward the product side, water and dust do not enter from the exit surface.
  • the waterproof cover toward the product side which is larger than the Brewster angle of the cover material, it is possible to control the light distribution toward the product side with high efficiency, and to display the product displayed on the shelf board. Illumination can be performed efficiently, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain an illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on a shelf board and a waterproof / dustproof function. Further, by using this lighting device, it is possible to obtain a shelf unit and a showcase that are not dazzling for the viewer, can illuminate the product with high efficiency, do not enter water and dust, and can be illuminated stably.
  • the illuminating device 1 is used to illuminate a product that is mounted on the end of a shelf board 5 and displayed on the shelf board 5 as shown in FIG. Further, in the case of a showcase provided with the price rail 4, it is mounted between the tip 5 a of the shelf board 5 and the price rail 4.
  • a lighting device 1A shown in FIG. 2 includes a light source 2 disposed along a longitudinal direction of a shelf (corresponding to a width direction when viewed from the front, and hereinafter referred to as a width direction of the shelf), and the light source
  • An incident surface 31 on which light emitted from 2 is incident, a light guide path 10A for guiding the light incident from the incident surface in a direction orthogonal to the width direction, and the guided light are displayed on a shelf board
  • a light guide 3A including a first exit surface 32 that emits toward the product side.
  • the light guide 3A has a first surface 34a and a second surface 34b that face each other and form the light guide path 10A.
  • emission surface 32 inclines toward the goods displayed on the shelf board, and is arrange
  • an angle ⁇ 1 formed by the light guide direction guided through the light guide path 10 ⁇ / b> A and the perpendicular of the outer surface of the waterproof cover 7 is inclined by tilting the outer surface of the waterproof cover 7 toward the product side. The angle is larger than the Brewster angle.
  • the light source 2 used here may be a light source that emits illumination light in the width direction of the shelf.
  • a linear light source cold cathode tube
  • the point light source LED
  • the incident surface 31 of the light guide 3A is directed downward
  • the first exit surface 32 is disposed upward
  • the light source 2 is disposed so as to face the incident surface 31, and the light from the light source 2 is The light is guided upward along the light guide path 10 ⁇ / b> A arranged in a substantially vertical direction, and is emitted from the outer surface 7 a of the waterproof cover 7 toward the product side.
  • the light source 2 is an LED light source
  • a substrate 21 is disposed in the width direction of the shelf board, and a plurality of chip-type LED light sources are mounted on the substrate 21.
  • a white LED light source that emits white light is used by combining a blue LED chip and a phosphor that is excited by light from the LED chip and emits excitation light having a predetermined wavelength.
  • the substrate 21 has a length about the width of the shelf board, and a plurality of LED light sources are mounted on the board 21 at a predetermined pitch.
  • the shelf width may be configured to be divided into a plurality of substrates and electrically connected to each other.
  • first reflecting surface 11 and the second reflecting surface 12 are installed outside the opposing first surface 34a and second surface 34b forming the light guide path 10A, respectively, with an air layer interposed therebetween.
  • a waterproof cover 7 is attached to the upper part of the first reflecting surface 11 and the second reflecting surface 12.
  • the light guide 3A is made of a transparent material that transmits visible light (for example, PMMA: acryl having a refractive index of about 1.5).
  • the light beam emitted from the light source 2 is guided toward the first exit surface 32 while being totally reflected between the first surface 34a and the second surface 34b.
  • the light beam deviating from the total reflection angle is reflected by the first reflecting surface 11 and the second reflecting surface 12 and returned again into the light guide 3 ⁇ / b> A, and all the light beams are emitted from the first exit surface 32. is doing.
  • the first reflection surface 11 and the second reflection surface 12 are formed by forming the inner surface of the frame that accommodates the light guide 3A as a reflection surface obtained by, for example, performing a white reflection process or a mirror process of white coating on an aluminum sheet metal. Further, a resin material may be used instead of the aluminum sheet metal, and a mirror treatment or a mirror film may be attached to the inner surface.
  • the waterproof cover 7 is disposed so as to cover the upper part of the frame including the first reflecting surface 11 and the second reflecting surface 12, and is configured to prevent water from entering from above. Therefore, when an LED light source is installed and used on the substrate 21 provided on the bottom surface portion, by preventing water from entering the substrate 21 portion and the LED light source portion, short circuit or LED deterioration is prevented. Can do.
  • the waterproof cover 7 provided in the lighting device 1A of the first embodiment is inclined to the upper end portions of the first reflecting surface 11 and the second reflecting surface 12 that are installed to face each other, as shown in the figure. It is composed of a flat plate-shaped translucent member (for example, a polycarbonate having a high visible light transmittance and high chemical resistance, and a hard coat for scratch prevention). That is, the incident surface (inner surface) and the exit surface (outer surface 7a) of the waterproof cover 7 are substantially parallel and are inclined toward the products displayed on the shelf board. For example, the angle ⁇ 1 formed by the direction guided through the light guide path 10A and the perpendicular of the outer surface 7a is inclined by about 65 °.
  • a diffusion portion 14 having a predetermined diffusion characteristic is provided in a region close to the first exit surface 32 of the first surface 34a on the viewer side.
  • the predetermined diffusion characteristic preferably has a diffusion angle ⁇ of about 5 ° to 20 ° (for example, a Gaussian scattering characteristic of ⁇ 10 °). If the diffusion angle is too large, the illumination light diverges at a wide angle, illuminating a useless area and lowering the illumination efficiency.
  • the diffusing unit 14 having a predetermined diffusion characteristic is provided in a region close to the exit surface, so that uniform illumination is achieved. Can generate light. That is, the light can be guided with high efficiency while maintaining the light distribution characteristic, and uniform illumination light can be emitted.
  • first surface 34a and the second surface 34b, or the first reflection surface 11 and the second reflection surface 12 are used as diffusion reflection surfaces so that the diffusion angle of the diffusion portion 14 provided in a predetermined region can be reduced. Good.
  • emitted from the light source 2 will inject into a light guide from the light guide entrance surface 31, and the light ray which satisfy
  • the light is guided to the first exit surface 32. Further, light rays that do not satisfy the total reflection condition are guided to the first exit surface 32 while being diffusely reflected between the first and second reflection surfaces that are diffuse reflection surfaces.
  • the first reflection surface 11 and the second reflection surface 12 are mirror surfaces, since almost all of the light rays reaching the diffusion region of the light guide are stored from the light source 2, the illumination is uniformized. In order to reduce color unevenness, it is necessary to increase the diffusion degree of the diffusion unit 14.
  • the illumination light is efficiently emitted to the product side by the reflection surface (first reflection surface 11) on the observer side, and at the same time, illumination light that does not satisfy the total reflection condition is emitted to the observer side, and the observer becomes dazzling. Can be prevented.
  • total reflection has a reflectance of approximately 100%, light can be efficiently guided from the incident surface to the exit surface.
  • the reflectivity of the reflecting surface is lower than that of total reflection, so the attenuation of light guide light energy is lower than that of total reflection. Big.
  • the light guide 3A is disposed in the light guide path 10A, and light rays satisfying the total reflection condition of the light guide 3A are totally reflected and guided to efficiently guide the light from the light source 2 to the emitting portion. be able to.
  • the light reaching the first exit surface 32 is refracted and emitted, enters the waterproof cover 7 disposed substantially parallel to the first exit surface 32 through the air layer, exits from the outer surface 7a of the waterproof cover, and is illuminated.
  • the product displayed on the shelf board is illuminated as light.
  • the light distribution center of the illumination light is tilted slightly toward the shelf board from directly above.
  • the illumination light is emitted to the observer side from directly above, the observer cannot observe the product well because the illumination light is dazzling.
  • the light distribution center is greatly inclined to the shelf side, only the lower part of the product is brightly illuminated, and it is difficult to illuminate the entire face surface uniformly and satisfactorily.
  • the angle ⁇ 1 formed by the vertical direction and the perpendicular of the exit surface (outer surface 7a) of the waterproof cover 7 is about 65 °
  • the angle ⁇ 2 formed by the vertical direction and the perpendicular of the first exit surface 32 is also about 65. °.
  • the radiance characteristics of the lighting device 1A including the waterproof cover 7 having such a configuration will be described with reference to FIG.
  • the horizontal axis shown in the figure represents the radiation angle ⁇ A where the direction directly above the light guide is 0 ° and the clockwise angle toward the shelf is the positive direction.
  • the vertical axis represents luminance (relative value). Therefore, 0 ° is directly above, 90 ° is parallel to the shelf, and a negative angle means light emitted toward the viewer.
  • the lighting device 1A of the present embodiment has a luminance peak R1 at a position inclined by about 30 ° from the vertical direction, and a product displayed on the shelf board in the range of 0 ° ⁇ A ⁇ 90 °, that is, on the shelf board. It turns out that it has the light distribution characteristic which can be illuminated favorably.
  • the angular characteristic of radiance is inversely proportional to the square of sin ⁇ . This is because the distance between the lighting device and the face surface is substantially proportional to sin ⁇ .
  • the luminance peak R1 is in the vicinity of 30 °, and the luminance gradually decreases toward 90 °. Therefore, the illuminance of the face surface on the shelf is uniform within the range of 60 ° above the shelf. You can see that In other words, it can be seen that a lighting device capable of illuminating a wide range above can be realized with a small lighting device that does not interfere with product observation even if it is arranged at the front end of the shelf.
  • ⁇ A ⁇ 0 ° that is, there is almost no light emitted to the observer side, so that the observer can observe the product comfortably without being dazzled.
  • the diffusing portion 14 is provided in a region of the first surface facing the first emission surface 32, the light LA from the light source 2 is diffused by the reflection surface just before the emission, and the first emission surface. 32 and the waterproof cover 7 are emitted as light beams LA1 and LA2 within a predetermined angle range. Further, a part of the light beam LA3 is totally reflected by the first exit surface 32 and is guided again into the light guide. That is, the light from the light source 2 is guided with high efficiency by total reflection until reaching the diffusing section 14, and the illumination light is made uniform just before emission to make the illumination light uniform and reduce color unevenness by color dispersion. Can be planned.
  • the white LED light source when a white LED light source is used as the light source, the white LED light source is generally a type that emits white light by combining a blue LED chip and a phosphor that emits excitation light of a predetermined wavelength when excited by light from the LED chip. Since it is a type that synthesizes white light using three primary color LED chips of blue LED chip, green LED chip and red LED chip, it will have discrete emission peaks at a plurality of wavelengths and a large refraction angle When used in an arrangement, color unevenness due to color dispersion is noticeably observed as intensity unevenness.
  • the incident angle on the exit surface is made random within a certain angle range by the diffusing section before the exit, it can be averaged and reduced to a level where no color unevenness is observed.
  • the waterproof cover 7 is provided on the first emission surface that emits illumination light toward the product side. Intrusion of dust can be prevented.
  • the waterproof cover 7 by tilting the waterproof cover 7 toward the product side, which is larger than the Brewster angle of the cover material, the light distribution can be controlled toward the product side with high efficiency, and the product displayed on the shelf board. Can be efficiently illuminated, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain a shelf illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on the shelf and a waterproof / dustproof function.
  • the illumination device 1B includes a light guide 3B having a rectangular cross section and a substantially horizontal exit surface 32B. About another structure, it is the same as that of 1 A of illuminating devices demonstrated previously, and a different part is mainly demonstrated.
  • the light emitted from the light source 2, incident on the light guide 3 ⁇ / b> B, and guided through the light guide to the exit surface 32 ⁇ / b> B is formed as a light beam having a light distribution center in a substantially vertical direction, between the light guide 3 ⁇ / b> B and the waterproof cover 7. It is injected into a wedge-shaped air layer in between.
  • the angle ⁇ 1 formed by the perpendicular of the exit surface of the waterproof cover 7 and the vertical direction is set to about 70 °. Even at 70 °, the angle is larger than the Brewster angle (about 60 °) of the waterproof cover 7 material, and the light distribution center of the light beam emitted from the waterproof cover 7 is inclined toward the shelf.
  • a part of the light beam emitted from the emission surface 32B of the light guide 3B is emitted to the viewer side and reaches the first reflection surface 11 through the air layer, but is diffusely reflected by the first reflection surface 11.
  • the structure is directed toward the waterproof cover 7. Therefore, since this light beam is emitted toward the shelf board side, the shelf board side can be illuminated more efficiently. Since the light beam emitted from the emission surface 32B is emitted from the waterproof cover 7 toward the product on the shelf board, this emission surface 32B also corresponds to the first emission surface of the present invention. Therefore, it demonstrates as the 1st injection surface 32B hereafter.
  • the diffusion unit 14 having a predetermined scattering characteristic (for example, a Gaussian scattering characteristic of ⁇ 15 °) is provided on the first surface close to the first emission surface 32B and the first emission surface 32B itself.
  • a predetermined scattering characteristic for example, a Gaussian scattering characteristic of ⁇ 15 °
  • the light is diffused by the first light emission surface 32B of the light guide 3B, and the light from the light source 2 is emitted in a predetermined angle range. Further, the light from the light source 2 is guided with high efficiency by total reflection until reaching the diffusing section 14, and is diffused in a predetermined angle range just before emission to make the illumination light uniform, and the illumination light is made uniform and colored. Color unevenness due to dispersion can be reduced.
  • the horizontal axis shown in the figure represents a radiation angle ⁇ A where the upward direction of light guide as described above is 0 ° and the clockwise angle toward the shelf is a positive direction.
  • the lighting device 1B of the present embodiment in which the exit surface of the light guide is substantially horizontal, the light emitted at a large angle (50 ° to 100 °) on the shelf side is reduced, and as a result, the waterproof cover 7
  • the maximum emission angle (luminance peak R2) of the illumination light emitted from the light source is 90 ° or less, and has luminance characteristics that are more inversely proportional to the square of sin ⁇ than in the illumination device 1A in the range of ⁇ > 30 °.
  • the illuminance does not increase rapidly in the vicinity of the shelf surface, and the face surface of the product displayed on the shelf plate can be illuminated more uniformly.
  • the waterproof cover 7 is provided on the exit surface side, entry of water and dust into the light source section and the light guide path can be prevented.
  • the waterproof cover 7 by tilting the waterproof cover 7 toward the product side, which is larger than the Brewster angle of the cover material, the light distribution can be controlled toward the product side with high efficiency, and the product displayed on the shelf board. Can be efficiently illuminated, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain a shelf illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on the shelf and a waterproof / dustproof function.
  • This illuminating device 1C is provided with an optical path branching unit that branches light from the light source 2 in two different directions instead of the light guide 3A provided in the above-described illuminating device 1A, and an upward facing disposing a waterproof cover as the light guiding route
  • a light guide 3C having a first light guide path that guides light and a second light guide path that guides light in a downward direction opposite to the first light guide path is used.
  • the light guide 3C has an integral shape with a T-shaped cross section. That is, the incident light guide path has a first light guide path 10Ca and a second light guide path 10Cb branched in two different directions, for example, up and down, and further guides light from the light source 2 to the first and second light guide paths. 10 Cc.
  • the waterproof cover 7 provided on the upper side can prevent water and dust from entering the light guide path.
  • the light source 2 for example, the LED light source, is fixed to the substrate 21 and has a plurality of LEDs arranged in a line in the width direction of the shelf board. Moreover, the upper and lower sides of the shelf board can be illuminated simultaneously via the optical path branching section that branches the light from the light source 2 in two different directions.
  • the incident portion 31C corresponding to the shaft portion having a T-shaped cross section is held by using the frame 13C, and the substrate 21 on which the light source 2 is mounted is fixed to the frame 13C.
  • the light guide 3C, the frame 13C, and the substrate 21 are long members whose longitudinal direction is the direction penetrating the drawing. For example, a plurality of light sources 2 including LED light sources are arranged in parallel in the longitudinal direction.
  • the frame 13C includes an upper reflecting plate 13Ca and a lower reflecting plate 13Cb that hold the incident portion 31C of the light guide 3C.
  • the incident portion 31C includes a V-groove incident surface on the surface facing the light source 2, and the first incident surface 31Ca and the second incident surface 31Cb that split the light flux in two different directions are formed in a V-groove shape.
  • Crossed That is, a light beam branching portion is formed by providing a refractive surface having a substantially V-shaped cross section at a position facing the light source 2 on the incident surface.
  • first reflecting plate 11C is attached to the surface (first surface 34Ca) side facing the incident portion 31C
  • second reflecting plate 12C is attached to the back surface portion at a position facing the first reflecting plate 11C.
  • the body portion constituting the first light guide path 10Ca of the light guide 3C is sandwiched between the first reflector 11C and the second reflector 12C.
  • the light guide 3C is made of a transparent body having a refractive index of 1 or more. In this embodiment, it is made of PMMA having a refractive index of about 1.5. However, a light guide made of a material other than this may be used, and a transparent resin such as a glass material or acrylic or polycarbonate other than PMMA may be used depending on the application. It may be used.
  • the space between the light guide 3C and all members (reflecting plates) is an air layer, and the light guided through the light guide satisfies the total reflection condition according to the refractive index of the light guide 3C. If the light is totally reflected on the light guide surface and does not satisfy the total reflection condition, the light is once exited from the light guide 3C, reflected on the reflecting plate surface, returned to the light guide again, and guided toward the exit surface.
  • the You may affix a mirror sheet on the surface of a reflecting plate. By increasing the reflectance of the reflecting plate surface, light can be guided more efficiently.
  • the intersection angle between the first incident surface 31Ca and the second incident surface 31Cb forming the light beam branching portion of the V-shaped cross section is, for example, 120 degrees. This intersection angle is set in the range of 90 to 150 degrees depending on the light emitting surface size and light emitting angle of the light source 2, the thickness of the light guide 3C, the direction in which the illumination light is emitted, and the like.
  • the light emitted from the light source 2 via the light beam branching portion is refracted from the straight traveling direction on the entrance surface having a V-groove shape, and is directed in two different directions (for example, upward and downward) with respect to the straight traveling direction. And the light is guided through the light guide toward the exit surface.
  • the upper emission surface is the first emission surface 32C. Further, the downward illumination light is emitted from the second emission surface 33C toward the lower product.
  • the main rays of illumination light are indicated by broken lines.
  • the light beam L1 is emitted from the light source 2, refracted by the first incident surface 31Ca, reaches the first surface without hitting the upper reflecting plate 13Ca, is reflected by the first reflecting plate 11C outside the first surface, The light is repeatedly reflected between the two reflecting plates 12C, guided to the first exit surface 32C, refracted and emitted toward the rear upper side of the illumination unit.
  • the light beam L2 is emitted from the light source 2, refracted at the second incident surface 31Cb, reaches the first surface without hitting the lower reflecting plate 13Cb, is reflected by the first reflecting plate 11C outside the first surface, The light is guided to the second exit surface 33C, which is a side exit surface, and is refracted and emitted toward the rear lower side of the illumination unit.
  • the light beam L3 is emitted from the light source 2, refracted by the second incident surface 31Cb, totally reflected by the lower reflecting plate 13Cb, and reaches the first surface. Thereafter, the light is guided to the first exit surface 32C by the behavior substantially the same as that of the light beam L1, and is refracted and emitted.
  • the light beam L4 is emitted from the light source 2, is refracted by the first incident surface 31Ca, is totally reflected by the upper reflecting plate 13Ca, and reaches the first surface. After that, the light is once reflected by the second exit surface 33Ca, reflected again by the first surface, then guided to the second exit surface 33C, refracted, and emitted toward the rear lower side of the illumination unit.
  • the light distribution characteristics of the light beam that behaves similarly to the light beam L1 and the light beam that behaves similar to the light beam L3 are obtained.
  • the light emitted from the light source 2 can be used efficiently as illumination light without waste, and a high-efficiency bright illumination device can be realized. Can do. The same applies to the behavior of the light rays L2 and L4.
  • the angle ⁇ 1 formed between the vertical direction and the perpendicular of the exit surface (outer surface 7Ca) of the waterproof cover 7C is about 65 °, and the vertical direction and the perpendicular of the first exit surface 32C of the light guide are formed.
  • the angle ⁇ 2 is about 75 °.
  • an angle ⁇ 2A formed by the vertical direction and the perpendicular line of the second light exit surface 33C of the light guide is also set to about 75 °.
  • any angle is larger than the Brewster angle of the waterproof cover and the light guide, and the shelf side can be illuminated with high efficiency and in a wide range.
  • the angle ⁇ 1 is about 65 ° and the angle ⁇ 2 is about 75 °, so that the distance between the waterproof cover 7C and the first emission surface 32C is formed wider as it goes downward. . Therefore, a housing (a part of the frame 13C) that holds the waterproof cover 7C can be arranged in the formed space.
  • the projecting engagement portion 13Cd is provided on the frame 13C, and the lower curved portion 7Ca provided on the waterproof cover 7C is fitted into the projecting engagement portion 13Cd.
  • the waterproof cover 7C can be attached to the frame 13C and sealed so that water and dust do not enter the inside of the apparatus and the substrate side, and the waterproofness and dustproofness can be improved.
  • the upper side of the waterproof cover 7C and the upper bent portion 7Cb cover the upper side of the light guide 3C, and are inserted and held between the front cover (first reflector 11C) and the light guide 3C.
  • water applied to the waterproof cover 7C from the upper side becomes a gap between the front cover and the light guide 3C.
  • it travels between the front cover and the light guide 3C and is discharged downward as indicated by an arrow E in the figure.
  • the inner surface of the front cover that is, the inner surface of the first reflecting plate 11C is a reflecting surface having a predetermined diffusion characteristic.
  • the inner surface of the metal cover can be made of white paint.
  • the diffuse reflection surface is preferably set to have a Gaussian scattering diffusion angle ⁇ of about 10 ° to 30 °, for example. If the diffusion angle is too large, the illumination light diverges at a wide angle, which not only illuminates a useless area and lowers the illumination efficiency, but also moves toward the observer observing the product and does not obstruct product observation May occur.
  • the surface of the light guide 3C (first surface 34Ca) is also preferably a diffusion surface.
  • This diffusion surface can be formed by forming fine irregularities on the surface of the light guide.
  • this diffusion characteristic should just be a diffusion characteristic comparable as the front cover inner surface mentioned above.
  • Irradiance unevenness occurs because the direction of emission from the exit surface varies greatly depending on the number of total reflections on the exit surface.
  • the upper end surface 35C of the light guide 3C is provided with a flat portion, and the upper side is covered with the front cover and the extended surface 11Ca of the first reflecting plate 11C.
  • this illumination device 1C is used as an illumination device for a shelf board, when illumination light is emitted upward from an illumination device arranged below the observer's line of sight, the viewer is dazzled, and the shelf This is because it obstructs the observation of objects on the board (displayed products).
  • the lower end surface 36C of the light guide 3C is provided with a flat portion, and emits illumination light to the lower side.
  • a shelf plate whose front end position is arranged in front according to the lower stage, the upper front surface of the object cannot be illuminated with high quality only by illumination light emitted only up and down and rearward. By emitting illumination light directly below only, the lower stage can be illuminated with higher quality.
  • the light guide 3 ⁇ / b> C has a long configuration having a substantially T-shaped cross section, and the length thereof is set to approximately the width of the shelf board.
  • a plurality of LED light sources are arranged at regular intervals in the longitudinal direction.
  • the board on which the LEDs are mounted also has a length that is about the entire width of the shelf board.
  • the shelf width is wide, it may be divided into a plurality of substrates and electrically connected to each other.
  • the interval between the LEDs is set to about the height of the front cover (the width of the first reflector 11C). In general, if the interval between the LEDs is wide, the number of LEDs can be reduced, and the cost can be reduced. However, since the illuminance unevenness is generated in the illumination light in the LED arrangement direction as the LED interval becomes wider, it is necessary to set it to be equal to or less than the optical path length of the illumination light.
  • the cross section is T-shaped, the optical path length from the light source to the exit surface can be secured longer than the vertical width of the illumination unit. Therefore, even if the size of the lighting unit is set to be thin in the vertical direction, the LED interval can be set wide, which is advantageous for cost reduction.
  • Both sides of the illumination unit are covered with a side cover 15 so that illumination light is not emitted outside from the left and right end surfaces of the light guide.
  • the inner surface of the side cover 15 is a reflecting surface, and the illumination light that has reached the side cover 15 is again returned to the inside of the light guide, reflected by any of the reflecting surfaces, and then emitted as illumination light from the exit surface.
  • the illumination optical system of the present embodiment using the light guide 3C is asymmetric in the vertical direction. Only the upper side has a back reflecting surface (second reflecting plate 12C), and a long optical path from the light source to the exit surface is secured. This is because the upper illumination light often has a short distance from the object to be illuminated, and therefore it is necessary to make the illumination light uniform in the illumination device.
  • the light emitted from the illumination optical system is efficiently guided to the illumination target by fixing the rear reflection surface (second reflection plate 12C) to the shelf plate so that the rear surface of the reflection plate is in contact with the end surface of the shelf plate. be able to.
  • the light guide 3C may be divided in the width direction as shown in the figure.
  • the light guide 3CA and the light guide 3CB are divided into two.
  • a multi-divided configuration of two or more divisions may be used, and by adopting a split configuration, it is possible to change by simply changing the number of light guides when dealing with a plurality of types of shelf boards.
  • molding it is easier to shape
  • the waterproof cover may be integrated. That is, the light guide is divided into a plurality in the longitudinal direction (width direction when observed from the front of the shelf), and the waterproof cover is integrally formed in the longitudinal direction (width direction when observed from the front of the shelf). ing. If it is this structure, since a light guide can be produced as an aggregate
  • This illumination device 1D is different in that the light guide 3D is used instead of the frame 13C included in the illumination device 1C described above, using the frame 13D, using the waterproof cover 7D instead of the waterproof cover 7C.
  • Other configurations are the same as those of the lighting device 1C, and thus will not be described in detail here.
  • the waterproof cover 7D has a shape that integrally covers the upper first emission surface 32D and the lower second emission surface 33D of the light guide 3D. That is, the waterproof cover 7D includes an upper cover portion 7Da that covers the first emission surface 32D, a lower cover portion 7Db that covers the second emission surface 33D, and a connecting plate portion 7Dc that integrally connects them.
  • the connecting plate portion 7Dc is inserted and sandwiched between the first surface of the light guide 3D and the front cover (first reflecting plate 11D). Therefore, the water that has entered between the light guide 3D and the front cover out of the water applied from the top of the waterproof cover 7D is drained downward through this gap.
  • the frame 13D is provided with a first engagement portion 13Dd and a second engagement portion 13De, and the waterproof cover 7D is engaged with the first engagement portion 13Dd to engage with the upper engagement portion 7Dd and the second engagement portion.
  • a lower engaging portion 7De that is engaged with and engaged with the joint portion 13De is provided, and when the front cover is screwed to the frame 13D, the front cover and the frame 13D are sandwiched and fixed.
  • the angle ⁇ 1 formed by the vertical direction and the perpendicular of the upper emission surface of the waterproof cover 7D is about 75 °
  • the vertical direction and the first emission surface 32D of the light guide plate The angle ⁇ 2 formed with the perpendicular is 74 ° to 75 °.
  • the angle ⁇ 1A formed by the vertical direction and the perpendicular of the lower exit surface of the waterproof cover 7D (the outer surface of the lower cover portion 7Db) is also about 75 °
  • the angle ⁇ 2A formed by is also set to 74 ° to 75 °.
  • any angle is larger than the Brewster angle (about 60 °) of the waterproof cover and the light guide, and the shelf side can be illuminated with high efficiency and in a wide range.
  • FIG. 1 a shelf unit and a showcase provided with the above-described lighting device 1 (1A to 1D) will be described with reference to FIGS. 1, 12, and 13.
  • FIG. 1 a shelf unit and a showcase provided with the above-described lighting device 1 (1A to 1D) will be described with reference to FIGS. 1, 12, and 13.
  • FIG. 1 a shelf unit and a showcase provided with the above-described lighting device 1 (1A to 1D) will be described with reference to FIGS. 1, 12, and 13.
  • FIG. 1 shows a shelf unit 50 including an illumination device 1 (1A to 1D: for example, 1A) that illuminates the upper part of the shelf 5.
  • the lighting device 1 (1A) is mounted between a front end 5a of the shelf board 5 and a price rail 4 attached to the shelf board.
  • the unit configuration in which the lighting device 1 (1A) is attached to and integrated with the shelf plate 5 can save the trouble of attaching the illumination device after the shelf plate 5 is installed on the showcase body. Since the lighting device 1 (1A) according to the present embodiment is small in thickness and vertical width and can be configured to be lightweight, the lighting device 1 (1A) is easy to handle as the shelf unit 50 integrated with the shelf in advance.
  • a plurality of LEDs are arranged on a single substrate 21 at approximately equal intervals, and electrical components for a drive circuit are also installed on the same substrate 21.
  • power supply wiring (not shown, lead wires, etc.) extends to the back side of the shelf board.
  • the power supply wiring is fixed to the back side of the shelf up to the shelf main body attachment portion, and is connected to the main body power supply wiring via the connector at the shelf attachment portion.
  • the lighting device 1 (1A) can be configured so that the vertical width of the lighting unit is small, the observer can observe the product well without being disturbed by the lighting unit. In this way, by using the illumination device that illuminates upward from the front end of the shelf board, it is possible to satisfactorily observe the product face surface, particularly the lower side.
  • the shelf board unit 50A provided with the illuminating device 1 (1C, 1D: 1C, for example, 1C) that illuminates up and down from the front end of the shelf board, the face surface and upper side of the product can be observed well . That is, the illuminating device 1 (1C) attached to the front end of the upper shelf 5A has the illumination light RA1 at the center of light distribution directed upward of the shelf 5A and the illumination at the center of light distribution directed downward of the shelf 5A.
  • the illuminating device 1 (1C) having the light RB1 and attached to the tip of the lower shelf 5B is directed toward the lower side of the shelf 5B and the illumination light RA2 at the center of the light distribution toward the upper side of the shelf 5B. Illumination light RB2 at the center of light distribution.
  • the illumination light RA1 illuminates the face surface of the product M1 displayed on the shelf board 5A
  • the illumination light RA2 and the illumination light RB1 simultaneously illuminate the face surface and upper part of the product M2 displayed on the shelf board 5B.
  • by tilting the light distribution center of the illumination light RB1 from the face surface to the back side of the shelf not only the front end of the shelf but also the back of the shelf can be well illuminated, so products near the top of the shelf were sold. Later, you can observe the products in the back.
  • the shelf units 50 and 50A are provided with the lighting device 1 (1A to 1D) at the tip, the products displayed on the shelf can be illuminated with high quality.
  • a showcase having a plurality of such shelf board units is preferable because a showcase capable of easily observing the products displayed on the shelf board can be obtained.
  • a showcase SC having a configuration in which a shelf board unit 50A in which the shelf board 5 and the lighting device 1 (1C, 1D) are integrated is provided in a plurality of stages.
  • the lighting device 1 (1C, 1D) has a compact configuration and can have a small vertical width, an observer (a purchaser of the product) can observe the front of the product well without being disturbed by the lighting device. Further, even a tall product can be satisfactorily observed up to the face of the product, particularly the lower side, by using an illumination device that illuminates upward from the front end of the shelf board. Furthermore, by using an illuminating device that illuminates up and down from the front end of the shelf plate, it is possible to satisfactorily observe the face surface and upper side of the product.
  • the upper illumination is required to illuminate a wide range.
  • the lower side illumination often illuminates the upper part of the object placed on the shelf below the shelf to which the illumination device is attached, and therefore often has a distance from the object to be illuminated. Therefore, by tilting the light distribution center of the lower illumination to the rear side, it becomes possible to illuminate the objects arranged to the back of the shelf board from the upper side. In other words, the object surface can be illuminated from the front and simultaneously from the top to the back, so that products placed on the shelf can be easily observed.
  • the illumination device 1 (1A to 1D) since a waterproof cover having translucency and waterproofness is provided on the first emission surface that emits illumination light toward the product side, dust enters. Absent.
  • the waterproof cover toward the product side which is larger than the Brewster angle of the cover material, it is possible to control the light distribution toward the product side with high efficiency, and to display the product displayed on the shelf board. Illumination can be performed efficiently, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain an illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on a shelf board and a waterproof / dustproof function. Further, by using this lighting device, it is possible to obtain a shelf unit and a showcase that are not dazzling for the viewer, can illuminate the product with high efficiency, do not enter water and dust, and can be illuminated stably.
  • a diffusing portion 14 that diffuses a reflection surface, an incident surface, or an exit surface that forms a light guide path into a predetermined angle range, color unevenness or illuminance unevenness of a light source (LED light source) is reduced. It is possible to improve and realize a more uniform high-quality lighting device.
  • a shelf unit having a configuration in which the shelf and the lighting device are integrated is preferable because it is easy to handle. Moreover, if it is a showcase which provided this shelf board unit in multiple steps up and down, since the goods displayed on the shelf board can be illuminated uniformly from the upper and lower sides of a shelf board, it is preferable.
  • the illumination measure according to the present invention is to guide the light efficiently by arranging the light guide in the optical path, attach the waterproof cover, and incline the exit surface of the waterproof cover more than the Brewster angle.
  • the light device has a high light use efficiency and is a light device suitable for a showcase having both a light distribution characteristic capable of efficiently illuminating the product side and a waterproof / dustproof function.
  • the lighting device according to the present invention can be suitably applied to a lighting device used in a multistage showcase having a plurality of shelf boards on the top and bottom.
  • Lighting device 1-1D lighting device 2 Light source (LED light source) 3A to 3D Light guide 5 Shelf 7 to 7D Waterproof cover 11 First reflecting surface 12 Second reflecting surface 13 Frame 14 Diffusing portion 21 Substrate 31 Incident surface 32 to 32D First emitting surface 50, 50A Shelf unit SC Showcase

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Freezers Or Refrigerated Showcases (AREA)

Abstract

Provided are: an illumination device used in a showcase provided with a shelf board, and that has waterproof, dustproof functionality and light distribution characteristics that can efficiently illuminate products that are exhibited on the shelf board; a shelf board unit that is provided with the illumination device, can highly efficiently illuminate products, and can perform stable illumination without water or dust entering; and a showcase. The illumination device (1) (1A-1D) has a configuration wherein light from a light source (2) is guided to an exit section while reflecting the light and is emitted towards a predetermined direction from the exit section, the exit section is covered by a waterproof cover (7), the angle (θ1) formed by the direction of light guidance in which light is guided via a light guidance pathway and a normal line to the outer surface of the waterproof cover is a greater angle than Brewster's angle, and the outer surface of the waterproof cover is inclined towards the products. The shelf board unit (50, 50A) attaches and integrates the illumination device (1) (1A-1D) to a shelf board (5). The showcase (SC) is provided with a plurality of levels of shelf board units.

Description

照明装置、この照明装置を備えた棚板ユニットおよびショーケースIllumination device, shelf board unit and showcase provided with the illumination device
　本発明は、棚板用の照明装置およびこの照明装置を備えたショーケースに関し、例えば、棚板の先端に配設され、棚板上に陳列される商品の照明に好適な照明装置、この照明装置を備えた棚板ユニットおよびショーケースに関する。 The present invention relates to an illumination device for a shelf board and a showcase provided with the illumination apparatus. For example, the illumination apparatus suitable for illumination of a product arranged at the tip of the shelf board and displayed on the shelf board, and the illumination device The present invention relates to a shelf unit equipped with a device and a showcase.
　従来から、ショーケースに配設され、ショーケースに陳列された商品を照明するものとして、蛍光灯が広く用いられている。蛍光灯は、一般に電気エネルギーを可視放射、赤外放射、紫外放射に変換し、可視光線を放射することで、照明として用いるものである。その際、熱損失が生じるため、蛍光灯自体のみならず、当該蛍光灯による輻射熱によって、陳列された商品が加熱されるという問題があり、ショーケース用の照明装置の光源としては、必ずしも好ましいものとはいえない。 Conventionally, fluorescent lamps have been widely used to illuminate products placed in showcases and displayed in showcases. Fluorescent lamps are generally used as illumination by converting electric energy into visible radiation, infrared radiation, and ultraviolet radiation and emitting visible light. At that time, since heat loss occurs, there is a problem that not only the fluorescent lamp itself but also the displayed product is heated by the radiant heat from the fluorescent lamp, and the light source of the lighting device for the showcase is not necessarily preferable. That's not true.
　近年、発光効率の向上や発光量の増加と共に、寿命が長く消費電力が小さくて、環境にやさしいとされるＬＥＤ（Light　Emitting　Diode：発光ダイオード）を用いた照明装置が実用化されつつある。また、青色ＬＥＤチップが開発されて以来、この青色ＬＥＤチップと、このＬＥＤチップからの光に励起されて所定波長の励起光を発光する蛍光体と、を組み合わせて白色発光する白色ＬＥＤ光源や、青色ＬＥＤチップと緑色ＬＥＤチップと赤色ＬＥＤチップとの三原色のＬＥＤチップを用いて白色光を合成する白色ＬＥＤ光源が開発されている。 In recent years, along with improvement in luminous efficiency and increase in the amount of emitted light, lighting devices using LEDs (Light Emitting Diodes), which are considered to be environmentally friendly with long life and low power consumption, are being put into practical use. Since the blue LED chip was developed, a white LED light source that emits white light by combining the blue LED chip and a phosphor that is excited by light from the LED chip and emits excitation light of a predetermined wavelength, A white LED light source that synthesizes white light using three primary color LED chips of a blue LED chip, a green LED chip, and a red LED chip has been developed.
　そのために、照明装置として、この白色ＬＥＤ光源を配設したＬＥＤ照明装置が用いられている。特に、ショーケースなどの陳列棚の照明装置として、消費電力が小さく、発熱も小さいＬＥＤ光源を用いることが模索されており、例えば、棚板先端に配置し、棚上に陳列された商品を照明するＬＥＤ照明を設けたショーケースが既に提案されている（例えば、特許文献１参照）。 For this reason, an LED illumination device provided with this white LED light source is used as the illumination device. In particular, as an illumination device for display shelves such as showcases, it is sought to use LED light sources that consume less power and generate less heat. For example, it is arranged at the end of a shelf board to illuminate products displayed on the shelf. A showcase provided with LED lighting has already been proposed (see, for example, Patent Document 1).
　この特許文献１に記載されたショーケースは、商品の落下を防止するために設置するガードを透光性の板材から構成し、ＬＥＤ照明装置からの光をガード上端部から棚上の商品に向けて照射している。 In the showcase described in Patent Document 1, a guard installed to prevent the product from falling is composed of a translucent plate material, and light from the LED lighting device is directed from the upper end of the guard to the product on the shelf. Irradiating.
特開２０１０－８２１１５号公報JP 2010-82115 A
　棚板用の照明装置は、商品上で照度ムラのない均一な照明が望まれる。また、ショーケースなどの棚板用の照明装置としては、その設置場所により、水や埃がかかる可能性が高い。また、導光体であるガードは外部に露出しているために、傷付きやすい。導光体表面に水滴、埃が付いたり傷付いたりすると、その部分で光が導光経路から射出され、照明のムラが発生して好ましくない。 The shelf lighting device is required to have uniform illumination with no illuminance unevenness on the product. Moreover, as a lighting device for a shelf board such as a showcase, there is a high possibility that water or dust will be applied depending on the installation location. Moreover, since the guard which is a light guide is exposed to the outside, it is easily damaged. If water droplets, dust, or scratches are attached to the surface of the light guide, light is emitted from the light guide path at that portion, and illumination unevenness occurs, which is not preferable.
　しかし、特許文献１に記載されたショーケースは、落下防止用のガードを照明装置の導光体として使用しているために、ガードが露出しており、傷付きやすく、水や埃も付きやすくなっており、防水性や防塵性の観点からは好ましくない。 However, since the showcase described in Patent Document 1 uses a guard for preventing fall as a light guide for the lighting device, the guard is exposed, easily damaged, and easily attached to water and dust. It is not preferable from the viewpoint of waterproofness and dustproofness.
　また、ガードの上端面から射出される高輝度の照明光が観察者側に向かうために、観察者は眩しく、快適に商品を観察することができない。 In addition, since the high-intensity illumination light emitted from the upper end surface of the guard is directed to the observer side, the observer is dazzling and cannot comfortably observe the product.
　そのために、ショーケースなどの棚板の先端に装着して用いる照明装置は、棚板に陳列する商品を効率的に照明可能な配光特性を有し、さらに、防水・防塵機能を有することが好ましく、観察者が眩しくなく、容易に観察でき、清掃時に水や埃が入らずに容易に清掃可能で安定して照明可能な棚板ユニットおよびショーケースであることが好ましい。 Therefore, the lighting device that is used by being attached to the tip of a shelf board such as a showcase has a light distribution characteristic that can efficiently illuminate products displayed on the shelf board, and further has a waterproof / dustproof function. Preferably, it is a shelf unit and a showcase that are not dazzling and can be easily observed, can be easily cleaned without entering water or dust during cleaning, and can be stably illuminated.
　本発明は、上記の事情に鑑みてなされたものであって、棚板の先端に装着して用いる照明装置において、棚板に陳列する商品を効率的に照明可能な配光特性と、防水・防塵機能を有する照明装置を提供し、この照明装置を備えて、商品を高効率に照明可能で水や埃が入り込まず、安定して照明可能な棚板ユニットおよびショーケースを提供することを目的とする。 The present invention has been made in view of the above circumstances, and in an illuminating device that is used by being attached to the tip of a shelf board, a light distribution characteristic capable of efficiently illuminating a product displayed on the shelf board, An object of the present invention is to provide a lighting device having a dust-proof function, and to provide a shelf unit and a showcase that are equipped with this lighting device, can illuminate products with high efficiency, and can stably illuminate without entering water or dust. And
　上記目的を達成するために本発明は、棚板の先端に装着され、前記棚板の正面から観察したときの幅方向に沿って配設される光源と、該光源から出射された光が入射する入射面と、該入射面から入射した光を前記幅方向と直交する方向に導光する導光経路と、導光された光を前記棚板上に陳列された商品側に向けて射出する第一射出面と、を備える導光体を有し、前記棚板上に陳列される商品を照明する照明装置であって、前記導光体は、前記導光経路を形成する相対向した第一面と第二面とを有し、前記第一射出面側に、空気層を挟んで透光性と防水性を有する防水カバーを設置し、当該防水カバーの外面を前記商品側に向かって傾斜させ、前記導光経路を介して導光される導光方向と、前記防水カバーの外面の垂線との成す角度θ１を、前記防水カバーのブリュースター角よりも大きな角度としたことを特徴としている。 In order to achieve the above object, the present invention provides a light source that is attached to the front end of a shelf board and is arranged along the width direction when viewed from the front of the shelf board, and light emitted from the light source is incident An incident surface, a light guide path for guiding light incident from the incident surface in a direction orthogonal to the width direction, and the guided light is emitted toward a product side displayed on the shelf board. A lighting device for illuminating a product displayed on the shelf plate, the light guides being opposed to each other to form the light guide path. A waterproof cover having a light transmitting property and a waterproof property with an air layer in between, and having an outer surface of the waterproof cover facing the product side An angle θ1 formed by a light guide direction that is inclined and guided through the light guide path and a perpendicular to the outer surface of the waterproof cover. It is characterized in that it has a larger angle than the Brewster angle of the waterproof cover.
　上記の構成によると、棚板上に陳列された商品側を照明する第一射出面に防水カバーを設けているので、光源部や装置内部への水や埃の入り込みを防止できる。また、導光経路を導光体の第一面と第二面とで形成しているので、この第一面と第二面とで全反射させながら射出面まで導光でき、光源からの光を高効率に導光して射出することができる。また、防水カバーの傾きを、カバー材料のブリュースター角よりも大きな角度商品側に傾けることで、照明光を高効率で商品側に向けて配光制御でき、棚板上に陳列される商品を効率よく照明できると共に、観察者側に向かう光を低減することができる。そのために、観察者が眩しくなく、棚板に陳列する商品を効率的に照明可能な配光特性と、防水・防塵機能を有する照明装置を得ることができる。 According to the above configuration, since the waterproof cover is provided on the first exit surface for illuminating the product side displayed on the shelf board, it is possible to prevent water and dust from entering the light source section and the inside of the apparatus. In addition, since the light guide path is formed by the first surface and the second surface of the light guide, the light can be guided to the exit surface while being totally reflected by the first surface and the second surface. Can be guided and ejected with high efficiency. In addition, by tilting the waterproof cover toward the product side, which is larger than the Brewster angle of the cover material, it is possible to control the light distribution toward the product side with high efficiency, and to display the product displayed on the shelf board. It is possible to efficiently illuminate and reduce the light traveling toward the viewer. Therefore, it is possible to obtain an illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on a shelf board and a waterproof / dustproof function.
　また本発明は上記構成の照明装置において、前記導光経路を介して導光される導光方向と、前記第一射出面の垂線とのなす角θ２をブリュースター角よりも大きな角度で、前記商品側に傾けたことを特徴としている。この構成によると、防水カバーだけでなく、導光体の射出面を、キャップ部材を、ブリュースター角よりも大きな角度、商品側に傾けることで、棚板上に陳列される商品をより効率的に照明でき、観察者が商品を観察するときの眩しさをさらに低減することができる。 In the illumination device having the above-described configuration, the angle θ2 formed by the light guide direction guided through the light guide path and the perpendicular of the first emission surface is greater than the Brewster angle, It is characterized by tilting to the product side. According to this configuration, not only the waterproof cover but also the light guide light exit surface is inclined more efficiently than the Brewster angle by tilting the cap member to the product side, so that products displayed on the shelf board can be made more efficient. And the glare when the observer observes the product can be further reduced.
　また本発明は上記構成の照明装置において、前記第一面の外側に空気層を挟んで第一反射面を設け、前記第二面外側に空気層を挟んで第二反射面を設けたことを特徴としている。この構成によると、導光経路中に全反射条件から外れて外部に射出される光を、導光経路に戻して、効率よく射出面まで導光することができる。 According to the present invention, in the illumination device having the above-described configuration, a first reflective surface is provided outside the first surface with an air layer interposed therebetween, and a second reflective surface is provided outside the second surface with an air layer interposed therebetween. It is a feature. According to this configuration, light emitted outside the total reflection condition in the light guide path can be returned to the light guide path and efficiently guided to the exit surface.
　また本発明は上記構成の照明装置において、前記θ１およびθ２は８０°よりも小さいことを特徴としている。この構成によると、θ１やθ２が８０°よりも大きいと、同行経路の上下幅に対して、射出面の上下幅を大きくすることが必要となるので、θ１およびθ２を８０°よりも小さくすることで、照明装置のサイズをコンパクトにできる。 Further, according to the present invention, in the illumination device having the above-described configuration, the θ1 and θ2 are smaller than 80 °. According to this configuration, if θ1 and θ2 are larger than 80 °, it is necessary to increase the vertical width of the exit surface with respect to the vertical width of the accompanying path. Therefore, θ1 and θ2 are made smaller than 80 °. Thus, the size of the lighting device can be made compact.
　また本発明は上記構成の照明装置において、前記θ２を前記θ１よりも大きな角度とし、形成された空間部に前記防水カバーを保持する筐体を配置したことを特徴としている。この構成によると、この筐体に防水カバーを取り付けて、内部に水や埃を入り込ませないように封止することができ、防水性を高めることができる。 Further, the present invention is characterized in that, in the illumination device configured as described above, the angle θ2 is larger than the angle θ1, and a housing for holding the waterproof cover is disposed in the formed space. According to this configuration, the waterproof cover can be attached to the housing and sealed so that water and dust do not enter inside, and the waterproof property can be improved.
　また本発明は上記構成の板照明装置において、前記第一面の前記第一射出面に近接した領域に所定の拡散特性を有する拡散部を設けたことを特徴としている。この構成によると、射出直前の光束を所定範囲拡散して射出面に向けて反射するので、均一な照明光を生成できる。すなわち、高効率で配光特性を維持したまま導光でき、均一な照明光を射出することができる。 Further, the present invention is characterized in that in the plate illumination device having the above-described configuration, a diffusion portion having a predetermined diffusion characteristic is provided in a region of the first surface close to the first emission surface. According to this configuration, since the light flux immediately before emission is diffused within a predetermined range and reflected toward the emission surface, uniform illumination light can be generated. That is, the light can be guided with high efficiency while maintaining the light distribution characteristic, and uniform illumination light can be emitted.
　また本発明は上記構成の照明装置において、前記導光体は、前記光源からの光を異なる二方向に分岐する光路分岐部を備え、前記導光経路として、前記光を、前記第一射出面に向けて導光する第一導光経路と、該第一導光経路と逆方向に導光する第二導光経路を有することを特徴としている。この構成によると、第一導光経路を介して棚板の上側を照明し、第二導光経路を介して棚板の下側を照明できる。すなわち、棚板の上下を同時に照明可能な照明装置を実現できる。また、上側に設ける防水カバーにより、水や埃の入り込みを防止することができる。 Moreover, this invention is an illuminating device of the said structure, WHEREIN: The said light guide is equipped with the optical path branch part which branches the light from the said light source into two different directions, and uses the said light as said 1st emission surface as the said light guide path | route. And a second light guide path for guiding light in a direction opposite to the first light guide path. According to this configuration, the upper side of the shelf board can be illuminated via the first light guide path, and the lower side of the shelf board can be illuminated via the second light guide path. That is, it is possible to realize an illumination device that can simultaneously illuminate the top and bottom of the shelf board. In addition, the waterproof cover provided on the upper side can prevent water and dust from entering.
　また本発明は上記構成の照明装置において、前記導光体は前記棚板の正面から観察した時の幅方向に複数に分割され、前記防水カバーは前記幅方向に一体に形成されていることを特徴としている。この構成によると、導光体を所定の幅の集合体として作製できるので、製造コストを削減できる。また、防水カバーは長手方向（棚板の正面から観察したときの幅方向）に一体であるので、導光体間の隙間からの水や埃の入り込みを十分防止することができる。 In the illumination device having the above-described configuration, the light guide is divided into a plurality of width directions when viewed from the front of the shelf, and the waterproof cover is integrally formed in the width direction. It is a feature. According to this configuration, the light guide can be manufactured as an assembly having a predetermined width, so that the manufacturing cost can be reduced. Moreover, since the waterproof cover is integrated in the longitudinal direction (the width direction when observed from the front of the shelf board), it is possible to sufficiently prevent water and dust from entering from the gap between the light guides.
　また本発明は上記構成の照明装置において、前記光源は、前記棚板の正面から観察した時の幅方向に沿って配設される複数のＬＥＤ光源からなることを特徴としている。この構成によると、高照度で消費電力が小さく、発熱も小さい高効率の照明装置を実現することができる。 Further, the present invention is characterized in that, in the illumination device having the above-described configuration, the light source includes a plurality of LED light sources disposed along a width direction when observed from the front of the shelf board. According to this configuration, it is possible to realize a highly efficient lighting device with high illuminance, low power consumption, and low heat generation.
　また本発明は、上記照明装置を先端部に設けた棚板ユニットであることを特徴としている。この構成によると、観察者が眩しくなく、商品を高効率に照明可能で水や埃が入り込まず、安定して照明可能な棚板ユニットを得ることができる。 Further, the present invention is characterized in that it is a shelf unit provided with the lighting device at the tip. According to this configuration, it is possible to obtain a shelf unit that is not dazzling, can illuminate the product with high efficiency, does not enter water and dust, and can be illuminated stably.
　また本発明は、上記棚板ユニットを複数段備えるショーケースであることを特徴としている。この構成によると、複数段の棚に陳列された商品を高効率に照明可能で水や埃が入り込まず、安定して照明可能なショーケースを得ることができる。 Further, the present invention is characterized in that it is a showcase provided with a plurality of the shelf unit. According to this configuration, it is possible to obtain a showcase that can illuminate products displayed on a plurality of shelves with high efficiency and that can stably illuminate without entering water or dust.
　本発明によれば、商品側に向けて照明光を射出する第一射出面に透光性と防水性を有する防水カバーを設けているので、この射出面から水や埃が入り込まない。また、防水カバーの傾きを、カバー材料のブリュースター角よりも大きな角度商品側に傾けることで、照明光を高効率で商品側に向けて配光制御でき、棚板上に陳列される商品を効率よく照明でき、観察者側に向かう光を低減することができる。そのために、観察者が眩しくなく、棚板に陳列する商品を効率的に照明可能な配光特性と、防水・防塵機能を有する照明装置を得ることができる。また、この照明装置を用いて、観察者が眩しくなく、商品を高効率に照明可能で水や埃が入り込まず、安定して照明可能な棚板ユニットおよびショーケースを得ることができる。 According to the present invention, since the waterproof cover having translucency and waterproofness is provided on the first exit surface that emits illumination light toward the product side, water and dust do not enter from the exit surface. In addition, by tilting the waterproof cover toward the product side, which is larger than the Brewster angle of the cover material, it is possible to control the light distribution toward the product side with high efficiency, and to display the product displayed on the shelf board. Illumination can be performed efficiently, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain an illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on a shelf board and a waterproof / dustproof function. Further, by using this lighting device, it is possible to obtain a shelf unit and a showcase that are not dazzling for the viewer, can illuminate the product with high efficiency, do not enter water and dust, and can be illuminated stably.
本発明に係る照明装置を装着した棚板を示す概略断面図である。It is a schematic sectional drawing which shows the shelf board with which the illuminating device which concerns on this invention was mounted | worn. 第一実施形態の照明装置の構成を示す概略断面図である。It is a schematic sectional drawing which shows the structure of the illuminating device of 1st embodiment. 屈折率１．５の透光性部材における入射角度と反射率の関係を示す図である。It is a figure which shows the relationship between the incident angle and the reflectance in the translucent member of refractive index 1.5. 第一実施形態の照明装置の照明光の輝度分布を示す図である。It is a figure which shows the luminance distribution of the illumination light of the illuminating device of 1st embodiment. 拡散部における光束の拡散状態を示す概略断面図である。It is a schematic sectional drawing which shows the diffusion state of the light beam in a diffusion part. 第二実施形態の照明装置を示す概略断面図である。It is a schematic sectional drawing which shows the illuminating device of 2nd embodiment. 第二実施形態の照明装置の照明光の輝度分布を示す図である。It is a figure which shows the luminance distribution of the illumination light of the illuminating device of 2nd embodiment. 第三実施形態の照明装置を示す概略断面図である。It is a schematic sectional drawing which shows the illuminating device of 3rd embodiment. 第三実施形態の照明装置を示す概略断面図である。It is a schematic sectional drawing which shows the illuminating device of 3rd embodiment. 導光体の構成を示す概略斜視図である。It is a schematic perspective view which shows the structure of a light guide. 第四実施形態の照明装置を示す概略断面図である。It is a schematic sectional drawing which shows the illuminating device of 4th embodiment. 棚板の上下を同時に照明する照明装置を備えた棚板ユニットを示す概略断面図である。It is a schematic sectional drawing which shows the shelf unit provided with the illuminating device which illuminates the upper and lower sides of a shelf simultaneously. 複数段の棚板を有するショーケースの一例を示す側面図である。It is a side view which shows an example of the showcase which has a multistage shelf board.
　以下に本発明の実施形態を図面を参照して説明する。また、同一構成部材については同一の符号を用い、詳細な説明は適宜省略する。 Embodiments of the present invention will be described below with reference to the drawings. Moreover, the same code | symbol is used about the same structural member, and detailed description is abbreviate | omitted suitably.
　本発明に係る照明装置１は、例えば、図１に示すように、棚板５の先端に装着され、棚板５上に陳列する商品を照明するために用いられる。また、プライスレール４を備えたショーケースなどの場合は、棚板５の先端５ａと、プライスレール４との間に装着される。 The illuminating device 1 according to the present invention is used to illuminate a product that is mounted on the end of a shelf board 5 and displayed on the shelf board 5 as shown in FIG. Further, in the case of a showcase provided with the price rail 4, it is mounted between the tip 5 a of the shelf board 5 and the price rail 4.
　次に、図２を用いて本発明に係る照明装置の第一実施形態について説明する。図２に示す照明装置１Ａは、棚板の長手方向（正面から観察したときの幅方向に相当し、以降、棚板の幅方向と称する）に沿って配設される光源２と、該光源２から出射された光が入射する入射面３１と、該入射面から入射した光を前記幅方向と直交する方向に導光する導光経路１０Ａと、導光された光を棚板上に陳列された商品側に向けて射出する第一射出面３２と、を備える導光体３Ａを有する。 Next, a first embodiment of the lighting device according to the present invention will be described with reference to FIG. A lighting device 1A shown in FIG. 2 includes a light source 2 disposed along a longitudinal direction of a shelf (corresponding to a width direction when viewed from the front, and hereinafter referred to as a width direction of the shelf), and the light source An incident surface 31 on which light emitted from 2 is incident, a light guide path 10A for guiding the light incident from the incident surface in a direction orthogonal to the width direction, and the guided light are displayed on a shelf board A light guide 3A including a first exit surface 32 that emits toward the product side.
　導光体３Ａは、導光経路１０Ａを形成する相対向する第一面３４ａと第二面３４ｂとを有する。また、第一射出面３２は、棚板上に陳列された商品に向かって傾斜しており、外側に空気層を挟んで配置され透光性と防水性を有する防水カバー７を設置している。また、防水カバー７の外面を商品側に向かって傾斜させ、導光経路１０Ａを介して導光される導光方向と、防水カバー７の外面の垂線との成す角度θ１を、防水カバー７のブリュースター角よりも大きな角度としている。 The light guide 3A has a first surface 34a and a second surface 34b that face each other and form the light guide path 10A. Moreover, the 1st injection | emission surface 32 inclines toward the goods displayed on the shelf board, and is arrange | positioned on both sides through the air layer, and the waterproof cover 7 which has translucency and waterproofness is installed. . In addition, an angle θ1 formed by the light guide direction guided through the light guide path 10 </ b> A and the perpendicular of the outer surface of the waterproof cover 7 is inclined by tilting the outer surface of the waterproof cover 7 toward the product side. The angle is larger than the Brewster angle.
　ここで用いる光源２は、棚板の幅方向に照明光を射出する光源であればよく、例えば、線状の光源（冷陰極管）や棚板の幅方向に間隔をおいて配設する複数の点状光源（ＬＥＤ）を用いることができる。また、導光体３Ａの入射面３１は下向きに、第一射出面３２は上向きに配置され、この入射面３１に対向するように光源２が配設されていて、光源２からの光は、略鉛直方向に配置される導光経路１０Ａに沿って上向きに導光され、防水カバー７の外面７ａから、商品側に向けて射出される。 The light source 2 used here may be a light source that emits illumination light in the width direction of the shelf. For example, a linear light source (cold cathode tube) or a plurality of light sources arranged at intervals in the width direction of the shelf. The point light source (LED) can be used. In addition, the incident surface 31 of the light guide 3A is directed downward, the first exit surface 32 is disposed upward, and the light source 2 is disposed so as to face the incident surface 31, and the light from the light source 2 is The light is guided upward along the light guide path 10 </ b> A arranged in a substantially vertical direction, and is emitted from the outer surface 7 a of the waterproof cover 7 toward the product side.
　光源２がＬＥＤ光源であれば、棚板の幅方向に基板２１を配設し、この基板２１に複数のチップ型のＬＥＤ光源を搭載する。また、例えば、青色ＬＥＤチップと、このＬＥＤチップからの光に励起されて所定波長の励起光を発光する蛍光体と、を組み合わせて白色発光する白色ＬＥＤ光源を用いる。基板２１は、例えば、棚板の全幅を均一に照明するために、棚板の幅程度の長さとされ、この上にＬＥＤ光源を所定ピッチで複数個搭載している。ただし、棚幅が広い場合は、複数の基板に分け、それぞれを電気的に接続する構成としてもよい。 If the light source 2 is an LED light source, a substrate 21 is disposed in the width direction of the shelf board, and a plurality of chip-type LED light sources are mounted on the substrate 21. Further, for example, a white LED light source that emits white light is used by combining a blue LED chip and a phosphor that is excited by light from the LED chip and emits excitation light having a predetermined wavelength. For example, in order to uniformly illuminate the entire width of the shelf board, the substrate 21 has a length about the width of the shelf board, and a plurality of LED light sources are mounted on the board 21 at a predetermined pitch. However, in the case where the shelf width is wide, it may be configured to be divided into a plurality of substrates and electrically connected to each other.
　また、導光経路１０Ａを形成する相対向する第一面３４ａと第二面３４ｂの外側には、それぞれ空気層を挟んで第一反射面１１と第二反射面１２とが設置され、この第一反射面１１と第二反射面１２の上部に防水カバー７が取り付けられている。 In addition, the first reflecting surface 11 and the second reflecting surface 12 are installed outside the opposing first surface 34a and second surface 34b forming the light guide path 10A, respectively, with an air layer interposed therebetween. A waterproof cover 7 is attached to the upper part of the first reflecting surface 11 and the second reflecting surface 12.
　導光体３Ａは、可視光を透過する透明な材料（例えば、屈折率が約１．５のＰＭＭＡ：アクリル）からなる。光源２から出射された光束は、第一面３４ａと第二面３４ｂとの間を全反射しながら第一射出面３２に向けて導光される。また、全反射角から外れた光束は、第一反射面１１と第二反射面１２とで反射され、再び導光体３Ａ内に戻されて、全ての光束を、第一射出面３２から射出している。 The light guide 3A is made of a transparent material that transmits visible light (for example, PMMA: acryl having a refractive index of about 1.5). The light beam emitted from the light source 2 is guided toward the first exit surface 32 while being totally reflected between the first surface 34a and the second surface 34b. In addition, the light beam deviating from the total reflection angle is reflected by the first reflecting surface 11 and the second reflecting surface 12 and returned again into the light guide 3 </ b> A, and all the light beams are emitted from the first exit surface 32. is doing.
　第一反射面１１および第二反射面１２は、導光体３Ａを収容するフレームの内面を、例えば、アルミ製板金に白色塗装の白色反射処理やミラー処理を施した反射面として形成する。また、アルミ製板金に替えて樹脂材を用いて、その内面にミラー処理やミラーフィルムを貼付してもよい。 The first reflection surface 11 and the second reflection surface 12 are formed by forming the inner surface of the frame that accommodates the light guide 3A as a reflection surface obtained by, for example, performing a white reflection process or a mirror process of white coating on an aluminum sheet metal. Further, a resin material may be used instead of the aluminum sheet metal, and a mirror treatment or a mirror film may be attached to the inner surface.
　防水カバー７は、第一反射面１１と第二反射面１２を備えるフレームの上部を覆うように配置され、上からの水の浸入を防ぐように構成されている。そのために、底面部に設ける基板２１上にＬＥＤ光源を設置して使用する場合、基板２１部およびＬＥＤ光源部への水の浸入を防ぐことで、短絡（ショート）やＬＥＤの劣化などを防ぐことができる。 The waterproof cover 7 is disposed so as to cover the upper part of the frame including the first reflecting surface 11 and the second reflecting surface 12, and is configured to prevent water from entering from above. Therefore, when an LED light source is installed and used on the substrate 21 provided on the bottom surface portion, by preventing water from entering the substrate 21 portion and the LED light source portion, short circuit or LED deterioration is prevented. Can do.
　また、この第一実施形態の照明装置１Ａが備える防水カバー７は、図に示すように、相対向して設置される第一反射面１１と第二反射面１２の上端部に傾斜して配設される平板状の透光性部材（例えば、可視光透過率が高く、耐薬品性も高いポリカーボネート、および、防傷のためのハードコートを施したもの）からなる。すなわち、防水カバー７が備える入射面（内面）と射出面（外面７ａ）とは略平行であり、棚板上に陳列される商品に向かうように傾斜している。例えば、導光経路１０Ａを介して導光される方向と、外面７ａの垂線とのなす角θ１が約６５°傾いている。 In addition, the waterproof cover 7 provided in the lighting device 1A of the first embodiment is inclined to the upper end portions of the first reflecting surface 11 and the second reflecting surface 12 that are installed to face each other, as shown in the figure. It is composed of a flat plate-shaped translucent member (for example, a polycarbonate having a high visible light transmittance and high chemical resistance, and a hard coat for scratch prevention). That is, the incident surface (inner surface) and the exit surface (outer surface 7a) of the waterproof cover 7 are substantially parallel and are inclined toward the products displayed on the shelf board. For example, the angle θ1 formed by the direction guided through the light guide path 10A and the perpendicular of the outer surface 7a is inclined by about 65 °.
　また、観察者側の第一面３４ａの第一射出面３２に近接した領域に所定の拡散特性を有する拡散部１４を設けている。所定の拡散特性とは、拡散角度σが５°～２０°（例えば、σ１０°のガウス散乱特性）程度が好ましい。拡散角度が大き過ぎると、照明光が広角度に発散してしまい、無駄な領域まで照明し照明効率が低下する。 In addition, a diffusion portion 14 having a predetermined diffusion characteristic is provided in a region close to the first exit surface 32 of the first surface 34a on the viewer side. The predetermined diffusion characteristic preferably has a diffusion angle σ of about 5 ° to 20 ° (for example, a Gaussian scattering characteristic of σ10 °). If the diffusion angle is too large, the illumination light diverges at a wide angle, illuminating a useless area and lowering the illumination efficiency.
　このように、射出面に近接した領域に所定の拡散特性を有する拡散部１４を設けた構成であれば、射出直前の光束を所定範囲拡散して射出面に向けて反射するので、均一な照明光を生成できる。すなわち、高効率で配光特性を維持したまま導光でき、均一な照明光を射出することができる。 In this way, with the configuration in which the diffusing unit 14 having a predetermined diffusion characteristic is provided in a region close to the exit surface, the light flux just before the exit is diffused by a predetermined range and reflected toward the exit surface, so that uniform illumination is achieved. Can generate light. That is, the light can be guided with high efficiency while maintaining the light distribution characteristic, and uniform illumination light can be emitted.
　また、第一面３４ａと第二面３４ｂ、または、第一反射面１１と第二反射面１２を、拡散反射面として、所定の領域に設ける拡散部１４の拡散角度を小さくできるようにしてもよい。 Further, the first surface 34a and the second surface 34b, or the first reflection surface 11 and the second reflection surface 12 are used as diffusion reflection surfaces so that the diffusion angle of the diffusion portion 14 provided in a predetermined region can be reduced. Good.
　このような構成であれば、光源２から射出された光は、導光体入射面３１から導光体に入射し、導光体の全反射条件を満たす光線は導光体内部を全反射しながら第一射出面３２まで導光される。また、全反射条件を満足しない光線は、拡散反射面である第１および第２反射面間で拡散反射しながら第一射出面３２まで導光される。 If it is such a structure, the light inject | emitted from the light source 2 will inject into a light guide from the light guide entrance surface 31, and the light ray which satisfy | fills the total reflection conditions of a light guide will totally reflect the inside of a light guide. However, the light is guided to the first exit surface 32. Further, light rays that do not satisfy the total reflection condition are guided to the first exit surface 32 while being diffusely reflected between the first and second reflection surfaces that are diffuse reflection surfaces.
　第１反射面１１および第２反射面１２が鏡面のとき、導光体の拡散領域に到達する光線の略全てが光源２から射出された状態を保存しているために、照明の均一化、色ムラの低減を図るためには、拡散部１４の拡散度を大きくする必要がある。 When the first reflection surface 11 and the second reflection surface 12 are mirror surfaces, since almost all of the light rays reaching the diffusion region of the light guide are stored from the light source 2, the illumination is uniformized. In order to reduce color unevenness, it is necessary to increase the diffusion degree of the diffusion unit 14.
　特に、観察者側の反射面（第１反射面１１）により、照明光を商品側へ効率よく射出すると同時に、全反射条件を外れた照明光が観察者側へ射出し、観察者が眩しくなることを防ぐことができる。また、不要な照明光を射出しないことにより照明装置の省エネ化も可能となる。 In particular, the illumination light is efficiently emitted to the product side by the reflection surface (first reflection surface 11) on the observer side, and at the same time, illumination light that does not satisfy the total reflection condition is emitted to the observer side, and the observer becomes dazzling. Can be prevented. In addition, it is possible to save energy in the lighting device by not emitting unnecessary illumination light.
　全反射は略１００％の反射率を有するため、光を効率的に入射面から射出面へと導光することができる。一方、反射面による面間反射で光源部から射出部へ導光する場合は、反射面の反射率が全反射と比較して低いことから、導光光のエネルギーの減衰が、全反射に比べて大きい。 Since total reflection has a reflectance of approximately 100%, light can be efficiently guided from the incident surface to the exit surface. On the other hand, when light is guided from the light source unit to the emitting unit by inter-surface reflection by the reflecting surface, the reflectivity of the reflecting surface is lower than that of total reflection, so the attenuation of light guide light energy is lower than that of total reflection. Big.
　すなわち、導光経路１０Ａに導光体３Ａを配置し、導光体３Ａの全反射条件を満たす光線は全反射させて導光させることにより効率よく、光源２からの光を射出部へと導くことができる。 That is, the light guide 3A is disposed in the light guide path 10A, and light rays satisfying the total reflection condition of the light guide 3A are totally reflected and guided to efficiently guide the light from the light source 2 to the emitting portion. be able to.
　第一射出面３２まで到達した光は、屈折して射出され、空気層を介して第一射出面３２と略平行に配置された防水カバー７に入射し、防水カバー外面７ａから射出し、照明光として、棚板上に陳列された商品を照明する。 The light reaching the first exit surface 32 is refracted and emitted, enters the waterproof cover 7 disposed substantially parallel to the first exit surface 32 through the air layer, exits from the outer surface 7a of the waterproof cover, and is illuminated. The product displayed on the shelf board is illuminated as light.
　屈折面における入射角が大きい場合、界面におけるフレネル反射を考慮しなければならないことが知られている。これは、図３に示すフレネル反射の入射角度と反射率との関係から判るように、屈折率が１．５の媒質に入射する光は、約６０°よりも入射角が大きくなると、すなわち、ブリュースター角（約６０°）よりも大きくなると、反射率は急激に増加するからである。この図３には、屈折率ｎ＝１．５の媒質に入射するｐ波の反射率（ｐ反射率）とｓ波の反射率（ｓ反射率）とこれらの平均反射率を示している。 It is known that Fresnel reflection at the interface must be taken into account when the incident angle on the refracting surface is large. As can be seen from the relationship between the incident angle and the reflectance of Fresnel reflection shown in FIG. 3, the light incident on the medium having a refractive index of 1.5 has an incident angle larger than about 60 °, that is, This is because the reflectivity increases abruptly when the angle becomes larger than the Brewster angle (about 60 °). FIG. 3 shows the reflectivity of p-wave (p reflectivity) and the reflectivity of s-wave (s reflectivity) incident on a medium having a refractive index n = 1.5, and the average reflectivity thereof.
　言い換えれば、屈折率１．５の媒質から空気中（屈折率１．０）へ射出される光線を考えると、この射出角がブリュースター角以上になると、光の射出効率が急激に低下する。 In other words, considering a light beam emitted from a medium having a refractive index of 1.5 into the air (refractive index of 1.0), when the emission angle is equal to or greater than the Brewster angle, the light emission efficiency is drastically reduced.
　一方、棚板の先端に設置し、棚の上方に向かって、主に商品のフェイス面を照明するための照明装置では、照明光の配光中心が、真上よりも少し棚板側に傾いている状態が好ましい。直上よりも観察者側へ照明光が射出されると、観察者は照明光が眩しくて商品を良好に観察できない。また、配光中心が棚板側へ大きく傾くと、商品の下部のみを明るく照らす照明となってしまい、フェイス面全体を均一に良好に照明することは難しい。 On the other hand, in an illuminating device that is installed at the front end of a shelf board and illuminates mainly the face of the product toward the top of the shelf, the light distribution center of the illumination light is tilted slightly toward the shelf board from directly above The state is preferable. When the illumination light is emitted to the observer side from directly above, the observer cannot observe the product well because the illumination light is dazzling. Moreover, if the light distribution center is greatly inclined to the shelf side, only the lower part of the product is brightly illuminated, and it is difficult to illuminate the entire face surface uniformly and satisfactorily.
　本実施形態では、鉛直方向と防水カバー７の射出面（外面７ａ）の垂線とのなす角θ１が約６５°であり、鉛直方向と第一射出面３２の垂線とのなす角θ２も約６５°としている。このように、θ１、θ２ともに、ブリュースター角より、大きな角度を持たせることにより、射出角度が負、すなわち観察者側へ向かう照明光を低減することができる。 In the present embodiment, the angle θ1 formed by the vertical direction and the perpendicular of the exit surface (outer surface 7a) of the waterproof cover 7 is about 65 °, and the angle θ2 formed by the vertical direction and the perpendicular of the first exit surface 32 is also about 65. °. In this way, by setting both θ1 and θ2 to be larger than the Brewster angle, the illumination angle is negative, that is, the illumination light traveling toward the viewer can be reduced.
　このような形態の防水カバー７を備える照明装置１Ａの放射輝度特性について図４を用いて説明する。 The radiance characteristics of the lighting device 1A including the waterproof cover 7 having such a configuration will be described with reference to FIG.
　図に示す横軸は、導光される真上方向を０°とし、棚板に向かう時計周りの角度を正の方向とする放射角θＡを示す。また、縦軸に輝度（相対値）を示す。従って、０°が真上、９０°が棚板と平行方向、負の角度は観察者側へと射出される光を意味する。この図から、本実施形態の照明装置１Ａは、鉛直方向から約３０°傾いた位置に輝度ピークＲ１を有し、０°＜θＡ＜９０°の範囲、すなわち棚板上に陳列された商品を良好に照明できる配光特性を有していることが判る。 The horizontal axis shown in the figure represents the radiation angle θA where the direction directly above the light guide is 0 ° and the clockwise angle toward the shelf is the positive direction. The vertical axis represents luminance (relative value). Therefore, 0 ° is directly above, 90 ° is parallel to the shelf, and a negative angle means light emitted toward the viewer. From this figure, the lighting device 1A of the present embodiment has a luminance peak R1 at a position inclined by about 30 ° from the vertical direction, and a product displayed on the shelf board in the range of 0 ° <θA <90 °, that is, on the shelf board. It turns out that it has the light distribution characteristic which can be illuminated favorably.
　棚板先端に取り付けた小型（棚板厚さと同等レベルの高さを有する）照明装置を用いて棚板上の商品を照明する場合、フェイス面（垂直面）照度を均一とするためには、放射輝度の角度特性がｓｉｎθの二乗に反比例することが好ましい。これは、照明装置とフェイス面との距離がｓｉｎθに略比例するからである。 When illuminating a product on a shelf using a small lighting device attached to the tip of the shelf (having a height equivalent to the thickness of the shelf), in order to make the face surface (vertical surface) illuminance uniform, It is preferable that the angular characteristic of radiance is inversely proportional to the square of sin θ. This is because the distance between the lighting device and the face surface is substantially proportional to sin θ.
　本実施形態では、３０°付近に輝度ピークＲ１を有し、９０°に向かうにつれて次第に輝度が低下していることから、棚板から上方６０°の範囲で、棚板上のフェイス面照度を均一にできることが判る。言い換えれば、棚板先端に配置しても商品観察の邪魔にならない小型の照明装置で、上方の広い範囲を照明可能な照明装置を実現できることが判る。 In the present embodiment, the luminance peak R1 is in the vicinity of 30 °, and the luminance gradually decreases toward 90 °. Therefore, the illuminance of the face surface on the shelf is uniform within the range of 60 ° above the shelf. You can see that In other words, it can be seen that a lighting device capable of illuminating a wide range above can be realized with a small lighting device that does not interfere with product observation even if it is arranged at the front end of the shelf.
　また、θＡ＜０°、即ち観察者側へ射出される光は略ないので、観察者は、眩しくなく快適に商品を観察することができる。 Also, θA <0 °, that is, there is almost no light emitted to the observer side, so that the observer can observe the product comfortably without being dazzled.
　図５に示すように、第１面の第一射出面３２に対向する領域に拡散部１４を設けているので、射出直前の反射面で拡散し、光源２からの光線ＬＡは第一射出面３２および防水カバー７から光線ＬＡ１、ＬＡ２として所定の角度範囲で射出する。また、一部の光線ＬＡ３は、第一射出面３２で全反射し、再び導光体内に導かれる。すなわち、光源２からの光は、拡散部１４に至るまでは全反射により高効率で導光し、射出直前で照明光を均一にして、照明光の均一化、色分散による色ムラの低減を図ることができる。 As shown in FIG. 5, since the diffusing portion 14 is provided in a region of the first surface facing the first emission surface 32, the light LA from the light source 2 is diffused by the reflection surface just before the emission, and the first emission surface. 32 and the waterproof cover 7 are emitted as light beams LA1 and LA2 within a predetermined angle range. Further, a part of the light beam LA3 is totally reflected by the first exit surface 32 and is guided again into the light guide. That is, the light from the light source 2 is guided with high efficiency by total reflection until reaching the diffusing section 14, and the illumination light is made uniform just before emission to make the illumination light uniform and reduce color unevenness by color dispersion. Can be planned.
　特に光源として白色ＬＥＤ光源を用いるとき、一般に白色ＬＥＤ光源は、青色ＬＥＤチップと、このＬＥＤチップからの光に励起されて所定波長の励起光を発光する蛍光体とを組み合わせて白色発光するタイプか、青色ＬＥＤチップと緑色ＬＥＤチップと赤色ＬＥＤチップとの三原色のＬＥＤチップを用いて白色光を合成するタイプであるため、複数の波長に離散的に発光ピークを有することになり、屈折角度の大きな配置で使用する場合には、色分散による色ムラが強度ムラとして目だって観察される。 In particular, when a white LED light source is used as the light source, the white LED light source is generally a type that emits white light by combining a blue LED chip and a phosphor that emits excitation light of a predetermined wavelength when excited by light from the LED chip. Since it is a type that synthesizes white light using three primary color LED chips of blue LED chip, green LED chip and red LED chip, it will have discrete emission peaks at a plurality of wavelengths and a large refraction angle When used in an arrangement, color unevenness due to color dispersion is noticeably observed as intensity unevenness.
　しかし、射出前に拡散部により射出面への入射角度を一定の角度範囲でランダムにしておれば、平均化され、色ムラが観察されないレベルまで低減することができる。 However, if the incident angle on the exit surface is made random within a certain angle range by the diffusing section before the exit, it can be averaged and reduced to a level where no color unevenness is observed.
　上記したように、本実施形態に係る照明装置１Ａによれば、商品側に向けて照明光を射出する第一射出面に防水カバー７を設けているので、光源部や装置内部への水や埃の入り込みを防止できる。また、防水カバー７の傾きを、カバー材料のブリュースター角よりも大きな角度商品側に傾けることで、照明光を高効率で商品側に向けて配光制御でき、棚板上に陳列される商品を効率よく照明できると共に、観察者側に向かう光を低減することができる。そのために、観察者が眩しくなく、棚板に陳列する商品を効率的に照明可能な配光特性と、防水・防塵機能を有する棚板照明装置を得ることができる。 As described above, according to the illumination device 1A according to the present embodiment, the waterproof cover 7 is provided on the first emission surface that emits illumination light toward the product side. Intrusion of dust can be prevented. In addition, by tilting the waterproof cover 7 toward the product side, which is larger than the Brewster angle of the cover material, the light distribution can be controlled toward the product side with high efficiency, and the product displayed on the shelf board. Can be efficiently illuminated, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain a shelf illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on the shelf and a waterproof / dustproof function.
　次に、図６を用いて第二実施形態の照明装置１Ｂについて説明する。 Next, the illuminating device 1B of 2nd embodiment is demonstrated using FIG.
　照明装置１Ｂは、断面長方形状で略水平な射出面３２Ｂを有する導光体３Ｂを備える。その他の構成については、先に説明した照明装置１Ａと同様であり、相違する部分を主に説明する。光源２から射出され、導光体３Ｂに入射し、導光体中を射出面３２Ｂまで導かれた光は、略鉛直方向に配光中心を有する光束として、導光体３Ｂと防水カバー７の間の楔状の空気層へ射出される。 The illumination device 1B includes a light guide 3B having a rectangular cross section and a substantially horizontal exit surface 32B. About another structure, it is the same as that of 1 A of illuminating devices demonstrated previously, and a different part is mainly demonstrated. The light emitted from the light source 2, incident on the light guide 3 </ b> B, and guided through the light guide to the exit surface 32 </ b> B is formed as a light beam having a light distribution center in a substantially vertical direction, between the light guide 3 </ b> B and the waterproof cover 7. It is injected into a wedge-shaped air layer in between.
　また、本実施形態では、防水カバー７の射出面の垂線と鉛直方向との成す角θ１を約７０°としている。７０°でも防水カバー７材のブリュースター角（約６０°）よりも大きい角度であり、防水カバー７から射出される光束は、その配光中心が棚板側に傾いている。 Further, in the present embodiment, the angle θ1 formed by the perpendicular of the exit surface of the waterproof cover 7 and the vertical direction is set to about 70 °. Even at 70 °, the angle is larger than the Brewster angle (about 60 °) of the waterproof cover 7 material, and the light distribution center of the light beam emitted from the waterproof cover 7 is inclined toward the shelf.
　導光体３Ｂの射出面３２Ｂから射出される光束は、その一部が観察者側へ射出され空気層を介して第１反射面１１に至るが、この第１反射面１１で拡散反射されて防水カバー７に向かう構成となる。そのために、この光束が棚板側に向けて射出されるので、棚板側をより効率的に照明することができる。射出面３２Ｂから射出された光束は防水カバー７から棚板上の商品に向けて射出されるので、この射出面３２Ｂも本発明の第一射出面に相当する。そのために、以降第一射出面３２Ｂとして説明する。 A part of the light beam emitted from the emission surface 32B of the light guide 3B is emitted to the viewer side and reaches the first reflection surface 11 through the air layer, but is diffusely reflected by the first reflection surface 11. The structure is directed toward the waterproof cover 7. Therefore, since this light beam is emitted toward the shelf board side, the shelf board side can be illuminated more efficiently. Since the light beam emitted from the emission surface 32B is emitted from the waterproof cover 7 toward the product on the shelf board, this emission surface 32B also corresponds to the first emission surface of the present invention. Therefore, it demonstrates as the 1st injection surface 32B hereafter.
　また、所定の面に光を所定角度範囲に拡散する拡散部を設けて、さらに均一な面状の照明光を生成することが可能である。例えば、第一射出面３２Ｂに近接した第一面、および、第一射出面３２Ｂ自体に、所定の散乱特性（例えば、σ１５°のガウス散乱特性）を有する拡散部１４を設ける。 Also, it is possible to provide a more uniform planar illumination light by providing a diffusion portion that diffuses light in a predetermined angle range on a predetermined surface. For example, the diffusion unit 14 having a predetermined scattering characteristic (for example, a Gaussian scattering characteristic of σ15 °) is provided on the first surface close to the first emission surface 32B and the first emission surface 32B itself.
　このような構成であれば、導光体３Ｂの第一射出面３２Ｂで拡散し、光源２からの光を所定の角度範囲で射出する。また、光源２からの光は、拡散部１４に至るまでは全反射により高効率で導光し、射出直前で所定の角度範囲に拡散して照明光を均一にし、照明光の均一化、色分散による色ムラの低減を図ることができる。 In such a configuration, the light is diffused by the first light emission surface 32B of the light guide 3B, and the light from the light source 2 is emitted in a predetermined angle range. Further, the light from the light source 2 is guided with high efficiency by total reflection until reaching the diffusing section 14, and is diffused in a predetermined angle range just before emission to make the illumination light uniform, and the illumination light is made uniform and colored. Color unevenness due to dispersion can be reduced.
　このような形態の照明装置１Ｂの放射輝度特性について図７を用いて説明する。 The radiance characteristics of the illumination device 1B having such a configuration will be described with reference to FIG.
　図に示す横軸は、前述したように導光される真上方向を０°とし、棚板に向かう時計周りの角度を正の方向とする放射角θＡを示す。この図から、導光体の射出面を略水平とした本実施形態の照明装置１Ｂは、棚板側に大きな角度（５０°～１００°）で射出する光が低減し、結果、防水カバー７から射出する照明光の射出最大角度（輝度ピークＲ２）は９０°以下であり、照明装置１Ａと比較して、θ＞３０°の範囲でよりｓｉｎθの二乗に反比例する輝度特性を有する。 The horizontal axis shown in the figure represents a radiation angle θA where the upward direction of light guide as described above is 0 ° and the clockwise angle toward the shelf is a positive direction. From this figure, in the lighting device 1B of the present embodiment in which the exit surface of the light guide is substantially horizontal, the light emitted at a large angle (50 ° to 100 °) on the shelf side is reduced, and as a result, the waterproof cover 7 The maximum emission angle (luminance peak R2) of the illumination light emitted from the light source is 90 ° or less, and has luminance characteristics that are more inversely proportional to the square of sin θ than in the illumination device 1A in the range of θ> 30 °.
　従って、棚板面近傍で急激に照度が上がることがなく、棚板上に陳列された商品のフェイス面をより均一に照明することができる。 Therefore, the illuminance does not increase rapidly in the vicinity of the shelf surface, and the face surface of the product displayed on the shelf plate can be illuminated more uniformly.
　上記した照明装置１Ｂであっても、射出面側に防水カバー７を設けているので、光源部や導光経路内への水や埃の入り込みを防止できる。また、防水カバー７の傾きを、カバー材料のブリュースター角よりも大きな角度商品側に傾けることで、照明光を高効率で商品側に向けて配光制御でき、棚板上に陳列される商品を効率よく照明できると共に、観察者側に向かう光を低減することができる。そのために、観察者が眩しくなく、棚板に陳列する商品を効率的に照明可能な配光特性と、防水・防塵機能を有する棚板照明装置を得ることができる。 Even in the lighting device 1B described above, since the waterproof cover 7 is provided on the exit surface side, entry of water and dust into the light source section and the light guide path can be prevented. In addition, by tilting the waterproof cover 7 toward the product side, which is larger than the Brewster angle of the cover material, the light distribution can be controlled toward the product side with high efficiency, and the product displayed on the shelf board. Can be efficiently illuminated, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain a shelf illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on the shelf and a waterproof / dustproof function.
　次に、図８および図９を用いて第三実施形態の照明装置１Ｃについて説明する。 Next, the lighting device 1C according to the third embodiment will be described with reference to FIGS.
　この照明装置１Ｃは、前述した照明装置１Ａが備える導光体３Ａに替えて、光源２からの光を異なる二方向に分岐する光路分岐部を備え、導光経路として、防水カバーを配置する上向きに導光する第一導光経路と、該第一導光経路と逆向きの下向きに導光する第二導光経路を有する導光体３Ｃを用いた点が異なる。 This illuminating device 1C is provided with an optical path branching unit that branches light from the light source 2 in two different directions instead of the light guide 3A provided in the above-described illuminating device 1A, and an upward facing disposing a waterproof cover as the light guiding route The difference is that a light guide 3C having a first light guide path that guides light and a second light guide path that guides light in a downward direction opposite to the first light guide path is used.
　また、この導光体３Ｃは、断面Ｔ型の一体形状とされる。すなわち、異なる二方向、例えば上下に分岐した第一導光経路１０Ｃａと第二導光経路１０Ｃｂを有し、さらに、光源２からの光を第一、第二導光経路に導く入射導光経路１０Ｃｃを有する。 Further, the light guide 3C has an integral shape with a T-shaped cross section. That is, the incident light guide path has a first light guide path 10Ca and a second light guide path 10Cb branched in two different directions, for example, up and down, and further guides light from the light source 2 to the first and second light guide paths. 10 Cc.
　この構成によると、第一導光経路１０Ｃａを介して棚板の上側を照明し、第二導光経路１０Ｃｂを介して棚板の下側を照明できる。すなわち、棚板の上下を同時に照明可能な照明装置を実現できる。また、上側に設ける防水カバー７により、導光経路内への水や埃の入り込みを防止することができる。 According to this configuration, it is possible to illuminate the upper side of the shelf via the first light guide path 10Ca and illuminate the lower side of the shelf via the second light guide path 10Cb. That is, it is possible to realize an illumination device that can simultaneously illuminate the top and bottom of the shelf board. Further, the waterproof cover 7 provided on the upper side can prevent water and dust from entering the light guide path.
　また、上下二方向から同時に照明することにより、棚板上に陳列された商品のフェイス面をより均一に照明することが可能であり、二方向から照明することで影もできにくい。 Also, by illuminating simultaneously from two directions, it is possible to illuminate the face of the product displayed on the shelf more evenly, and it is difficult to produce shadows by illuminating from two directions.
　光源２、例えばＬＥＤ光源は基板２１に固定され、棚板の幅方向に一列に配列された複数のＬＥＤを有する。また、光源２からの光を異なる二方向に分岐する光路分岐部を介して、棚板の上下を同時に照明できる。 The light source 2, for example, the LED light source, is fixed to the substrate 21 and has a plurality of LEDs arranged in a line in the width direction of the shelf board. Moreover, the upper and lower sides of the shelf board can be illuminated simultaneously via the optical path branching section that branches the light from the light source 2 in two different directions.
　断面Ｔ型の軸部に相当する入射部３１Ｃをフレーム１３Ｃを用いて保持し、このフレーム１３Ｃに光源２を搭載する基板２１を固定する。導光体３Ｃ、フレーム１３Ｃ、および、基板２１は、図面を貫通する方向を長手方向とする長尺部材とされ、例えば、ＬＥＤ光源からなる光源２が長手方向に複数並設された構成とされる。また、フレーム１３Ｃは、導光体３Ｃの入射部３１Ｃを保持する上反射板１３Ｃａと下反射板１３Ｃｂを備える。 The incident portion 31C corresponding to the shaft portion having a T-shaped cross section is held by using the frame 13C, and the substrate 21 on which the light source 2 is mounted is fixed to the frame 13C. The light guide 3C, the frame 13C, and the substrate 21 are long members whose longitudinal direction is the direction penetrating the drawing. For example, a plurality of light sources 2 including LED light sources are arranged in parallel in the longitudinal direction. The The frame 13C includes an upper reflecting plate 13Ca and a lower reflecting plate 13Cb that hold the incident portion 31C of the light guide 3C.
　また、入射部３１Ｃは、光源２に対向する面にＶ溝状の入射面を備えており、異なる二方向に光束を分岐する第一入射面３１Ｃａと第二入射面３１ＣｂとがＶ溝状に交差している。すなわち、入射面の光源２に対向する位置に、略Ｖ型断面の屈折面を設けて光束分岐部を形成している。このような構成であれば、光源２が射出する光を、直接受けて異なる二方向に分岐するので、それぞれの射出面（第一射出面３２Ｃ、第二射出面３３Ｃ）に効率的に導光することができて好ましい。 Further, the incident portion 31C includes a V-groove incident surface on the surface facing the light source 2, and the first incident surface 31Ca and the second incident surface 31Cb that split the light flux in two different directions are formed in a V-groove shape. Crossed. That is, a light beam branching portion is formed by providing a refractive surface having a substantially V-shaped cross section at a position facing the light source 2 on the incident surface. With such a configuration, the light emitted from the light source 2 is directly received and branched in two different directions, so that the light is efficiently guided to the respective emission surfaces (the first emission surface 32C and the second emission surface 33C). This is preferable.
　また、入射部３１Ｃに対向する面（第一面３４Ｃａ）側に第一反射板１１Ｃを取り付け、この第一反射板１１Ｃと対向する位置にある背面部に第二反射板１２Ｃを取り付けていて、この第一反射板１１Ｃと第二反射板１２Ｃとで、導光体３Ｃの第一導光経路１０Ｃａを構成する胴体部を挟持する。 In addition, the first reflecting plate 11C is attached to the surface (first surface 34Ca) side facing the incident portion 31C, and the second reflecting plate 12C is attached to the back surface portion at a position facing the first reflecting plate 11C. The body portion constituting the first light guide path 10Ca of the light guide 3C is sandwiched between the first reflector 11C and the second reflector 12C.
　導光体３Ｃは，屈折率１以上の透明体で構成される。本実施形態では、屈折率が約１．５のＰＭＭＡ製としたが、これ以外の材質からなる導光体でもよく、用途に応じて、ガラス材料、ＰＭＭＡ以外のアクリルやポリカーボネートなどの透明樹脂を用いてもよい。 The light guide 3C is made of a transparent body having a refractive index of 1 or more. In this embodiment, it is made of PMMA having a refractive index of about 1.5. However, a light guide made of a material other than this may be used, and a transparent resin such as a glass material or acrylic or polycarbonate other than PMMA may be used depending on the application. It may be used.
　導光体３Ｃと全ての部材（反射板）の間は空気層であり、導光体中を導光する光は、導光体３Ｃの屈折率に応じ、全反射条件を満足する場合は、導光体面で全反射し、全反射条件を満足しない場合は、一旦導光体３Ｃから出た後、反射板面で反射し、再び導光体中に戻り、射出面に向かって導光される。反射板の表面にミラーシートを貼り付けてもよい。反射板面の反射率を上げることにより、より効率的に導光することができる。 The space between the light guide 3C and all members (reflecting plates) is an air layer, and the light guided through the light guide satisfies the total reflection condition according to the refractive index of the light guide 3C. If the light is totally reflected on the light guide surface and does not satisfy the total reflection condition, the light is once exited from the light guide 3C, reflected on the reflecting plate surface, returned to the light guide again, and guided toward the exit surface. The You may affix a mirror sheet on the surface of a reflecting plate. By increasing the reflectance of the reflecting plate surface, light can be guided more efficiently.
　Ｖ型断面の光束分岐部を形成する第一入射面３１Ｃａと第二入射面３１Ｃｂの交差角度は例えば１２０度である。この交差角度は、光源２の発光面サイズや発光角、導光体３Ｃの厚み、照明光の射出方向などにより、９０～１５０度の範囲で設定される。この光束分岐部を介して、光源２から射出された光は、Ｖ溝形状の入射面で、直進方向から屈折され、直進方向に対し、異なる二方向に（例えば、上側と下側に向かう光に）分岐され、導光体中を射出面に向かって導光される。 The intersection angle between the first incident surface 31Ca and the second incident surface 31Cb forming the light beam branching portion of the V-shaped cross section is, for example, 120 degrees. This intersection angle is set in the range of 90 to 150 degrees depending on the light emitting surface size and light emitting angle of the light source 2, the thickness of the light guide 3C, the direction in which the illumination light is emitted, and the like. The light emitted from the light source 2 via the light beam branching portion is refracted from the straight traveling direction on the entrance surface having a V-groove shape, and is directed in two different directions (for example, upward and downward) with respect to the straight traveling direction. And the light is guided through the light guide toward the exit surface.
　異なる二方向に分岐され上側に向かい、上側の射出面から棚板上の商品に向けて照明光が射出されるので、この上側の射出面が第一射出面３２Ｃである。また、下側に向かう照明光は、第二射出面３３Ｃから下側の商品に向けて射出される。 Since the illumination light is emitted from the upper emission surface toward the product on the shelf, the upper emission surface is the first emission surface 32C. Further, the downward illumination light is emitted from the second emission surface 33C toward the lower product.
　図中に、照明光の主な光線を破線で示す。光線Ｌ１は、光源２から射出し、第一入射面３１Ｃａで屈折し、上反射板１３Ｃａに当らず第一面に到達し、第一面外側の第一反射板１１Ｃで反射された後、第二反射板１２Ｃとの間で繰り返し反射して第一射出面３２Ｃに導かれ、屈折して照明ユニットの後上方に向かって射出される。 In the figure, the main rays of illumination light are indicated by broken lines. The light beam L1 is emitted from the light source 2, refracted by the first incident surface 31Ca, reaches the first surface without hitting the upper reflecting plate 13Ca, is reflected by the first reflecting plate 11C outside the first surface, The light is repeatedly reflected between the two reflecting plates 12C, guided to the first exit surface 32C, refracted and emitted toward the rear upper side of the illumination unit.
　光線Ｌ２は、光源２から射出し、第二入射面３１Ｃｂで屈折し、下反射板１３Ｃｂに当らず第一面に到達し、第一面外側の第一反射板１１Ｃで反射された後、下側射出面となる第二射出面３３Ｃに導かれ、屈折して照明ユニットの後下方に向かって射出される。 The light beam L2 is emitted from the light source 2, refracted at the second incident surface 31Cb, reaches the first surface without hitting the lower reflecting plate 13Cb, is reflected by the first reflecting plate 11C outside the first surface, The light is guided to the second exit surface 33C, which is a side exit surface, and is refracted and emitted toward the rear lower side of the illumination unit.
　光線Ｌ３は、光源２から射出し、第二入射面３１Ｃｂで屈折し、下反射板１３Ｃｂで全反射して第一面に到達する。その後、光線Ｌ１と略同様の振る舞いにより第一射出面３２Ｃに導かれ、屈折して射出される。 The light beam L3 is emitted from the light source 2, refracted by the second incident surface 31Cb, totally reflected by the lower reflecting plate 13Cb, and reaches the first surface. Thereafter, the light is guided to the first exit surface 32C by the behavior substantially the same as that of the light beam L1, and is refracted and emitted.
　光線Ｌ４は、光源２から射出し、第一入射面３１Ｃａで屈折し、上反射板１３Ｃａで全反射して第一面に到達する。その後、一旦第二射出面３３Ｃａで反射し、再度第一面で反射した後第二射出面３３Ｃに導かれ、屈折して照明ユニットの後下方に向かって射出される。 The light beam L4 is emitted from the light source 2, is refracted by the first incident surface 31Ca, is totally reflected by the upper reflecting plate 13Ca, and reaches the first surface. After that, the light is once reflected by the second exit surface 33Ca, reflected again by the first surface, then guided to the second exit surface 33C, refracted, and emitted toward the rear lower side of the illumination unit.
　そのために、上反射板１３Ｃａと下反射板１３Ｃｂの間隔および長さを最適に設定することにより、光線Ｌ１と同様の振る舞いをする光束と、光線Ｌ３と同様の振る舞いをする光束の配光特性が、共に所望の照明光配光特性となるように制御することにより、光源２から射出された光を無駄なく、効率的に照明光として用いることができ、高効率の明るい照明装置を実現することができる。光線Ｌ２と光線Ｌ４の振る舞いについても同様である。 Therefore, by optimally setting the interval and length between the upper reflecting plate 13Ca and the lower reflecting plate 13Cb, the light distribution characteristics of the light beam that behaves similarly to the light beam L1 and the light beam that behaves similar to the light beam L3 are obtained. By controlling the light distribution characteristics so as to achieve the desired illumination light distribution characteristics, the light emitted from the light source 2 can be used efficiently as illumination light without waste, and a high-efficiency bright illumination device can be realized. Can do. The same applies to the behavior of the light rays L2 and L4.
　また、本実施形態では、鉛直方向と防水カバー７Ｃの射出面（外面７Ｃａ）の垂線との成す角度θ１は約６５°とし、鉛直方向と導光体の第一射出面３２Ｃの垂線との成す角度θ２は約７５°としている。また、鉛直方向と導光体の第二射出面３３Ｃの垂線との成す角度θ２Ａも約７５°としている。 In the present embodiment, the angle θ1 formed between the vertical direction and the perpendicular of the exit surface (outer surface 7Ca) of the waterproof cover 7C is about 65 °, and the vertical direction and the perpendicular of the first exit surface 32C of the light guide are formed. The angle θ2 is about 75 °. Further, an angle θ2A formed by the vertical direction and the perpendicular line of the second light exit surface 33C of the light guide is also set to about 75 °.
　従って、いずれの角度も防水カバー、導光体のブリュースター角より大きく、棚板側を高効率に、また、広範囲に照明することが可能である。 Therefore, any angle is larger than the Brewster angle of the waterproof cover and the light guide, and the shelf side can be illuminated with high efficiency and in a wide range.
　上記したように、本実施形態では、角度θ１は約６５°とし、角度θ２は約７５°としているので、防水カバー７Ｃと第一射出面３２Ｃとの間隔が、下方にいくに従って広く形成される。そのために、この形成された空間部に防水カバー７Ｃを保持する筐体（フレーム１３Ｃの一部）を配置することができる。例えば、フレーム１３Ｃに突設係合部１３Ｃｄを設け、この突設係合部１３Ｃｄに防水カバー７Ｃに設ける下部湾曲部７Ｃａを嵌め込むようにする。このような構成であれば、上側から防水カバー７Ｃに掛かった水がフレーム内部や基板側に浸入することを防止できる。すなわち、フレーム１３Ｃに防水カバー７Ｃを取り付けて、装置内部や基板側に水や埃を入り込ませないように封止することができ、防水性と防塵性を高めることができる。 As described above, in the present embodiment, the angle θ1 is about 65 ° and the angle θ2 is about 75 °, so that the distance between the waterproof cover 7C and the first emission surface 32C is formed wider as it goes downward. . Therefore, a housing (a part of the frame 13C) that holds the waterproof cover 7C can be arranged in the formed space. For example, the projecting engagement portion 13Cd is provided on the frame 13C, and the lower curved portion 7Ca provided on the waterproof cover 7C is fitted into the projecting engagement portion 13Cd. With such a configuration, it is possible to prevent water applied to the waterproof cover 7C from the upper side from entering the inside of the frame or the substrate side. That is, the waterproof cover 7C can be attached to the frame 13C and sealed so that water and dust do not enter the inside of the apparatus and the substrate side, and the waterproofness and dustproofness can be improved.
　また、防水カバー７Ｃの上側、上部屈曲部７Ｃｂは、導光体３Ｃの上側を覆うと共に、前カバー（第一反射板１１Ｃ）と導光体３Ｃの間に挿入され保持される。このように、防水カバー７Ｃを前カバー（第一反射板１１Ｃ）と導光体３Ｃの間に挿入することにより、上側から防水カバー７Ｃに掛かった水は、前カバーと導光体３Ｃの隙間に入り込むが、前カバーと導光体３Ｃの間を伝って、図中の矢印Ｅに示すように下側に排出される。 Further, the upper side of the waterproof cover 7C and the upper bent portion 7Cb cover the upper side of the light guide 3C, and are inserted and held between the front cover (first reflector 11C) and the light guide 3C. In this way, by inserting the waterproof cover 7C between the front cover (first reflecting plate 11C) and the light guide 3C, water applied to the waterproof cover 7C from the upper side becomes a gap between the front cover and the light guide 3C. However, it travels between the front cover and the light guide 3C and is discharged downward as indicated by an arrow E in the figure.
　前カバーの内面、つまり、第一反射板１１Ｃの内面は、所定の拡散特性を有する反射面としている。例えば、金属製カバーの内面を白塗装したもので構成できる。この拡散反射面は、例えば、ガウス散乱拡散角度σが１０°～３０°程度に設定されることが好ましい。拡散角度が大き過ぎると、照明光が広角度に発散してしまい、無駄な領域まで照明し照明効率が下がるだけでなく、商品を観察している観察者側へ向かい、商品観察を邪魔する不要な照明となる場合が生じる。 The inner surface of the front cover, that is, the inner surface of the first reflecting plate 11C is a reflecting surface having a predetermined diffusion characteristic. For example, the inner surface of the metal cover can be made of white paint. The diffuse reflection surface is preferably set to have a Gaussian scattering diffusion angle σ of about 10 ° to 30 °, for example. If the diffusion angle is too large, the illumination light diverges at a wide angle, which not only illuminates a useless area and lowers the illumination efficiency, but also moves toward the observer observing the product and does not obstruct product observation May occur.
　導光体３Ｃの面（第一面３４Ｃａ）も拡散面であることが好ましい。この拡散面は、導光体表面に細かい凹凸を構成することにより形成することができる。また、この拡散特性も、前述した前カバー内面と同程度の拡散特性であればよい。 The surface of the light guide 3C (first surface 34Ca) is also preferably a diffusion surface. This diffusion surface can be formed by forming fine irregularities on the surface of the light guide. Moreover, this diffusion characteristic should just be a diffusion characteristic comparable as the front cover inner surface mentioned above.
　上側の第一射出面３２Ｃ、および、下側の第二射出面３３Ｃからの照明光は、その多くが射出面で大きく屈折する。従って、導光体材料の色分散により、照明光に色ムラが発生することがある。また、一度射出面に当っても全反射して第一面側に異なる角度で向かい、再度反射されて射出面より射出する光束も存在する。 Most of the illumination light from the upper first exit surface 32C and the lower second exit surface 33C is largely refracted by the exit surface. Therefore, color unevenness may occur in the illumination light due to color dispersion of the light guide material. In addition, there is also a light beam that is totally reflected even if it hits the exit surface once, is directed to the first surface at a different angle, is reflected again, and exits from the exit surface.
　射出面での全反射回数の違いにより、射出面からの射出方向が大きく異なるため、照度ムラが発生する。第一反射板１１Ｃの内面と導光体の第一面３４Ｃａを拡散面化することにより、これらの色ムラや照度ムラを改善し、より均一な高品位な照明装置を実現することができる。 照度 Irradiance unevenness occurs because the direction of emission from the exit surface varies greatly depending on the number of total reflections on the exit surface. By making the inner surface of the first reflecting plate 11C and the first surface 34Ca of the light guide into a diffusing surface, it is possible to improve these color unevenness and illuminance unevenness and realize a more uniform high-quality illumination device.
　図９に示すように、導光体３Ｃの上端面３５Ｃは平面部が設けられ、上側を前カバー、第一反射板１１Ｃの延設面１１Ｃａで覆っている。この照明装置１Ｃを棚板用の照明装置として用いたとき、観察者の視線よりも下側に配置される照明装置から、照明光が上側に向かって射出されると、観察者が眩しく、棚板上の物体（陳列された商品）の観察を妨げるからである。 As shown in FIG. 9, the upper end surface 35C of the light guide 3C is provided with a flat portion, and the upper side is covered with the front cover and the extended surface 11Ca of the first reflecting plate 11C. When this illumination device 1C is used as an illumination device for a shelf board, when illumination light is emitted upward from an illumination device arranged below the observer's line of sight, the viewer is dazzled, and the shelf This is because it obstructs the observation of objects on the board (displayed products).
　導光体３Ｃの下端面３６Ｃは平面部が設けられ、照明光を下側にも射出する。棚板の先端位置が、下段に従って手前に配置される棚板では、上下後方にのみ射出される照明光のみでは、物体の上前面を高品位に照明することができない。下方のみ直下にも照明光を射出することにより、下段をより高品位に照明することができる。 The lower end surface 36C of the light guide 3C is provided with a flat portion, and emits illumination light to the lower side. With a shelf plate whose front end position is arranged in front according to the lower stage, the upper front surface of the object cannot be illuminated with high quality only by illumination light emitted only up and down and rearward. By emitting illumination light directly below only, the lower stage can be illuminated with higher quality.
　導光体３Ｃは、図１０の斜視図に示すように、略Ｔ字形状の断面を有する長尺な構成であり、その長さは略棚板の幅程度に設定される。棚板の全幅を均一に照明するために、例えば、複数のＬＥＤ光源が、長手方向に一定の間隔で配列されている。ＬＥＤを搭載する基板も、棚板の全幅程度の長さを有する。棚幅が広い場合は、複数の基板に分割して、それぞれを電気的に接続してもよい。 As shown in the perspective view of FIG. 10, the light guide 3 </ b> C has a long configuration having a substantially T-shaped cross section, and the length thereof is set to approximately the width of the shelf board. In order to illuminate the entire width of the shelf uniformly, for example, a plurality of LED light sources are arranged at regular intervals in the longitudinal direction. The board on which the LEDs are mounted also has a length that is about the entire width of the shelf board. When the shelf width is wide, it may be divided into a plurality of substrates and electrically connected to each other.
　ＬＥＤの間隔は、略前カバーの高さ（第一反射板１１Ｃの幅）程度に設定される。一般に、ＬＥＤの間隔を広くとるとＬＥＤの個数を減らすことができ、コストダウンできる。しかし、ＬＥＤの間隔が広くなればなるほど、ＬＥＤ配列方向の照明光に照度ムラができるため、照明光の光路長と同等以下に設定する必要がある。 The interval between the LEDs is set to about the height of the front cover (the width of the first reflector 11C). In general, if the interval between the LEDs is wide, the number of LEDs can be reduced, and the cost can be reduced. However, since the illuminance unevenness is generated in the illumination light in the LED arrangement direction as the LED interval becomes wider, it is necessary to set it to be equal to or less than the optical path length of the illumination light.
　本実施形態では、断面がＴ字形状であるために、光源から射出面までの光路長は、照明ユニットの上下幅よりも長く確保できている。従って、照明ユニットのサイズを上下方向に薄型に設定しても、ＬＥＤ間隔を広く設定することが可能となり、コストダウンにも有利な構成である。 In this embodiment, since the cross section is T-shaped, the optical path length from the light source to the exit surface can be secured longer than the vertical width of the illumination unit. Therefore, even if the size of the lighting unit is set to be thin in the vertical direction, the LED interval can be set wide, which is advantageous for cost reduction.
　照明ユニットの両サイドは、サイドカバー１５で覆われ、導光体の左右端面から外部に照明光が射出されない構成となっている。サイドカバー１５の内面は反射面であり、サイドカバー１５に到達した照明光は再度導光体内部に戻され、いずれかの反射面で反射した後、射出面より照明光として射出される。 Both sides of the illumination unit are covered with a side cover 15 so that illumination light is not emitted outside from the left and right end surfaces of the light guide. The inner surface of the side cover 15 is a reflecting surface, and the illumination light that has reached the side cover 15 is again returned to the inside of the light guide, reflected by any of the reflecting surfaces, and then emitted as illumination light from the exit surface.
　導光体３Ｃを用いた本実施形態の照明光学系は、上下方向に非対称である。上側のみに背面反射面（第二反射板１２Ｃ）を有し、光源から射出面までの光路を長く確保している。上側の照明光は、被照明体との距離が近くなる場合が多いため、照明装置内で照明光を均一にしておく必要があるからである。 The illumination optical system of the present embodiment using the light guide 3C is asymmetric in the vertical direction. Only the upper side has a back reflecting surface (second reflecting plate 12C), and a long optical path from the light source to the exit surface is secured. This is because the upper illumination light often has a short distance from the object to be illuminated, and therefore it is necessary to make the illumination light uniform in the illumination device.
　また、背面反射面（第二反射板１２Ｃ）の後方が棚板の端面に接するようにして、棚板に固定することにより、照明光学系から射出される光を、効率的に照明対象に導くことができる。 Further, the light emitted from the illumination optical system is efficiently guided to the illumination target by fixing the rear reflection surface (second reflection plate 12C) to the shelf plate so that the rear surface of the reflection plate is in contact with the end surface of the shelf plate. be able to.
　照明装置の幅が広い場合、導光体３Ｃは、図に示すように幅方向に分割してもよい。例えば、導光体３ＣＡと導光体３ＣＢに二分割する。また二分割以上の複数分割構成でもよく、分割構成とすることで、複数タイプの幅の棚板に対応する際に、導光体の個数を変えるだけで変更が可能となる。また、導光体を成型により製造する場合は、小型に分割したほうが容易に成型できる。 When the width of the illumination device is wide, the light guide 3C may be divided in the width direction as shown in the figure. For example, the light guide 3CA and the light guide 3CB are divided into two. Further, a multi-divided configuration of two or more divisions may be used, and by adopting a split configuration, it is possible to change by simply changing the number of light guides when dealing with a plurality of types of shelf boards. Moreover, when manufacturing a light guide by shaping | molding, it is easier to shape | mold by dividing | segmenting small.
　導光体３Ｃを分割構成としても、防水カバーは一体でよい。すなわち、導光体は長手方向（棚板の正面から観察したときの幅方向）に複数に分割され、防水カバーは長手方向（棚板の正面から観察したときの幅方向）に一体に形成されている。この構成であれば、導光体を所定の幅の集合体として作製できるので、製造コストを削減できる。また、防水カバーは長手方向に一体であるので、導光体間の隙間からの水や埃の入り込みを十分防止することができる。 Even if the light guide 3C is divided, the waterproof cover may be integrated. That is, the light guide is divided into a plurality in the longitudinal direction (width direction when observed from the front of the shelf), and the waterproof cover is integrally formed in the longitudinal direction (width direction when observed from the front of the shelf). ing. If it is this structure, since a light guide can be produced as an aggregate | assembly of predetermined width | variety, manufacturing cost can be reduced. Further, since the waterproof cover is integrated in the longitudinal direction, it is possible to sufficiently prevent water and dust from entering from the gap between the light guides.
　次に、図１１を用いて第四実施形態の照明装置１Ｄについて説明する。 Next, the lighting device 1D of the fourth embodiment will be described with reference to FIG.
　この照明装置１Ｄは、前述した照明装置１Ｃが備えるフレーム１３Ｃに替えてフレーム１３Ｄを用い、防水カバー７Ｃに替えて防水カバー７Ｄを用い、導光体３Ｄを用いた点が異なる。また、その他の構成は、照明装置１Ｃと同じであるので、ここでは詳述しない。 This illumination device 1D is different in that the light guide 3D is used instead of the frame 13C included in the illumination device 1C described above, using the frame 13D, using the waterproof cover 7D instead of the waterproof cover 7C. Other configurations are the same as those of the lighting device 1C, and thus will not be described in detail here.
　この防水カバー７Ｄは、導光体３Ｄの上側の第一射出面３２Ｄと下側の第二射出面３３Ｄを一体に覆う形状とされる。すなわち、防水カバー７Ｄは、第一射出面３２Ｄ部を覆う上側カバー部７Ｄａと、第二射出面３３Ｄを覆う下側カバー部７Ｄｂと、これらを一体に連結する連結板部７Ｄｃを備えている。 The waterproof cover 7D has a shape that integrally covers the upper first emission surface 32D and the lower second emission surface 33D of the light guide 3D. That is, the waterproof cover 7D includes an upper cover portion 7Da that covers the first emission surface 32D, a lower cover portion 7Db that covers the second emission surface 33D, and a connecting plate portion 7Dc that integrally connects them.
　連結板部７Ｄｃは、導光体３Ｄの第一面と前カバー（第一反射板１１Ｄ）との間に挿入され挟持される。従って、防水カバー７Ｄの上から掛かった水のうち、導光体３Ｄと前カバーの間に浸入したものは、この隙間を通って下側に排水される。 The connecting plate portion 7Dc is inserted and sandwiched between the first surface of the light guide 3D and the front cover (first reflecting plate 11D). Therefore, the water that has entered between the light guide 3D and the front cover out of the water applied from the top of the waterproof cover 7D is drained downward through this gap.
　また、フレーム１３Ｄに第一係合部１３Ｄｄと第二係合部１３Ｄｅを設け、防水カバー７Ｄに、第一係合部１３Ｄｄに嵌合して係合する上側係合部７Ｄｄと、第二係合部１３Ｄｅに嵌合して係合する下側係合部７Ｄｅを設けて、前カバーをフレーム１３Ｄにネジ固定する際に、前カバーとフレーム１３Ｄとで挟み込んで固定する構成としている。 Further, the frame 13D is provided with a first engagement portion 13Dd and a second engagement portion 13De, and the waterproof cover 7D is engaged with the first engagement portion 13Dd to engage with the upper engagement portion 7Dd and the second engagement portion. A lower engaging portion 7De that is engaged with and engaged with the joint portion 13De is provided, and when the front cover is screwed to the frame 13D, the front cover and the frame 13D are sandwiched and fixed.
　すなわち、防水カバー７Ｄの上端と下端の両端は、固定時にフレーム１３Ｄに押し付けられて固定されるので、より密閉する構成となり防水性能を上げることができる。 That is, since both ends of the upper end and the lower end of the waterproof cover 7D are pressed and fixed to the frame 13D at the time of fixing, the structure becomes more sealed and the waterproof performance can be improved.
　また、本実施形態では、鉛直方向と防水カバー７Ｄの上側射出面（上側カバー部７Ｄａの外面）の垂線との成す角度θ１は約７５°とし、鉛直方向と導光板の第一射出面３２Ｄの垂線との成す角度θ２は７４°～７５°としている。また、鉛直方向と防水カバー７Ｄの下側射出面（下側カバー部７Ｄｂの外面）の垂線との成す角度θ１Ａも約７５°とし、鉛直方向と導光体の第二射出面３３Ｄの垂線との成す角度θ２Ａも７４°～７５°としている。 In the present embodiment, the angle θ1 formed by the vertical direction and the perpendicular of the upper emission surface of the waterproof cover 7D (the outer surface of the upper cover portion 7Da) is about 75 °, and the vertical direction and the first emission surface 32D of the light guide plate The angle θ2 formed with the perpendicular is 74 ° to 75 °. In addition, the angle θ1A formed by the vertical direction and the perpendicular of the lower exit surface of the waterproof cover 7D (the outer surface of the lower cover portion 7Db) is also about 75 °, and the vertical direction and the perpendicular of the second exit surface 33D of the light guide The angle θ2A formed by is also set to 74 ° to 75 °.
　従って、いずれの角度も防水カバー、導光体のブリュースター角（約６０°）より大きく、棚板側を高効率に、また、広範囲に照明することが可能である。 Therefore, any angle is larger than the Brewster angle (about 60 °) of the waterproof cover and the light guide, and the shelf side can be illuminated with high efficiency and in a wide range.
　次に、前述した照明装置１（１Ａ～１Ｄ）を備えた棚板ユニットおよびショーケースについて図１および図１２、図１３を用いて説明する。 Next, a shelf unit and a showcase provided with the above-described lighting device 1 (1A to 1D) will be described with reference to FIGS. 1, 12, and 13. FIG.
　図１には、棚板５の上部を照明する照明装置１（１Ａ～１Ｄ：例えば１Ａ）を備えた棚板ユニット５０を示している。この照明装置１（１Ａ）は、棚板５の前端５ａと棚板に取り付けるプライスレール４との間に装着されている。 FIG. 1 shows a shelf unit 50 including an illumination device 1 (1A to 1D: for example, 1A) that illuminates the upper part of the shelf 5. The lighting device 1 (1A) is mounted between a front end 5a of the shelf board 5 and a price rail 4 attached to the shelf board.
　このように、棚板５に照明装置１（１Ａ）を取り付けて一体化したユニット構成とすることで、棚板５をショーケース本体に設置した後、照明装置を取り付ける手間を省くことができる。本実施形態に係る照明装置１（１Ａ）は厚み、上下幅共に小さく、軽量に構成することが可能であるため、予め、棚板と一体化した棚板ユニット５０として取り扱いが容易である。 Thus, the unit configuration in which the lighting device 1 (1A) is attached to and integrated with the shelf plate 5 can save the trouble of attaching the illumination device after the shelf plate 5 is installed on the showcase body. Since the lighting device 1 (1A) according to the present embodiment is small in thickness and vertical width and can be configured to be lightweight, the lighting device 1 (1A) is easy to handle as the shelf unit 50 integrated with the shelf in advance.
　光源２（図２参照）は、例えば、複数のＬＥＤが一枚の基板２１上に略一列に等間隔で配置されており、同じ基板２１上に駆動回路用の電装部品も設置されている。基板２１からは、電源供給用の配線（不図示、リード線など）が棚板裏面側に伸びている。電源供給用の配線は、棚板本体取付け部まで棚板裏面側に固定され、棚板取付け部において、本体電源供給用の配線と、コネクタを介して接続される。 In the light source 2 (see FIG. 2), for example, a plurality of LEDs are arranged on a single substrate 21 at approximately equal intervals, and electrical components for a drive circuit are also installed on the same substrate 21. From the substrate 21, power supply wiring (not shown, lead wires, etc.) extends to the back side of the shelf board. The power supply wiring is fixed to the back side of the shelf up to the shelf main body attachment portion, and is connected to the main body power supply wiring via the connector at the shelf attachment portion.
　照明装置１（１Ａ）は照明ユニットの上下幅を小さく構成できるので、観察者は、照明ユニットに邪魔されることなく商品を良好に観察できる。このように、棚板先端から上方に向かって照明する照明装置を用いることで、商品のフェイス面、特に下側まで、良好に観察することができる。 Since the lighting device 1 (1A) can be configured so that the vertical width of the lighting unit is small, the observer can observe the product well without being disturbed by the lighting unit. In this way, by using the illumination device that illuminates upward from the front end of the shelf board, it is possible to satisfactorily observe the product face surface, particularly the lower side.
　また、図１２に示すように、棚板先端から上下に向かって照明する照明装置１（１Ｃ、１Ｄ：例えば１Ｃ）を備えた棚板ユニット５０Ａでは、商品のフェイス面および上側を良好に観察できる。すなわち、上の段の棚板５Ａの先端に取り付けた照明装置１（１Ｃ）は、棚板５Ａの上方に向かう配光中心の照明光ＲＡ１と、棚板５Ａの下方に向かう配光中心の照明光ＲＢ１とを有し、下の段の棚板５Ｂの先端に取り付けた照明装置１（１Ｃ）は、棚板５Ｂの上方に向かう配光中心の照明光ＲＡ２と、棚板５Ｂの下方に向かう配光中心の照明光ＲＢ２とを有する。 Moreover, as shown in FIG. 12, in the shelf board unit 50A provided with the illuminating device 1 (1C, 1D: 1C, for example, 1C) that illuminates up and down from the front end of the shelf board, the face surface and upper side of the product can be observed well . That is, the illuminating device 1 (1C) attached to the front end of the upper shelf 5A has the illumination light RA1 at the center of light distribution directed upward of the shelf 5A and the illumination at the center of light distribution directed downward of the shelf 5A. The illuminating device 1 (1C) having the light RB1 and attached to the tip of the lower shelf 5B is directed toward the lower side of the shelf 5B and the illumination light RA2 at the center of the light distribution toward the upper side of the shelf 5B. Illumination light RB2 at the center of light distribution.
　そして、照明光ＲＡ１により棚板５Ａに陳列された商品Ｍ１のフェイス面を照明し、照明光ＲＡ２と照明光ＲＢ１とで、棚板５Ｂに陳列された商品Ｍ２のフェイス面と上部を同時に照明して観察容易となる。また、照明光ＲＢ１の配光中心をフェイス面から棚板奥側へと傾けることにより、棚板先端部だけでなく、棚の奥まで良好に照明できるので、棚板先端付近の商品が売れた後も、奥の商品を良好に観察できる。 Then, the illumination light RA1 illuminates the face surface of the product M1 displayed on the shelf board 5A, and the illumination light RA2 and the illumination light RB1 simultaneously illuminate the face surface and upper part of the product M2 displayed on the shelf board 5B. Observation. In addition, by tilting the light distribution center of the illumination light RB1 from the face surface to the back side of the shelf, not only the front end of the shelf but also the back of the shelf can be well illuminated, so products near the top of the shelf were sold. Later, you can observe the products in the back.
　上記したように、照明装置１（１Ａ～１Ｄ）を先端部に設けた棚板ユニット５０、５０Ａであれば、棚板に陳列された商品を高品位に照明できる。また、このような棚板ユニットを複数段備えるショーケースであれば、棚板上に陳列された商品を、観察容易に照明可能なショーケースを得ることができて好ましい。 As described above, if the shelf units 50 and 50A are provided with the lighting device 1 (1A to 1D) at the tip, the products displayed on the shelf can be illuminated with high quality. In addition, a showcase having a plurality of such shelf board units is preferable because a showcase capable of easily observing the products displayed on the shelf board can be obtained.
　例えば、図１３に示すように、棚板５と照明装置１（１Ｃ、１Ｄ）が一体化された棚板ユニット５０Ａを複数段備えた構成のショーケースＳＣとする。 For example, as shown in FIG. 13, a showcase SC having a configuration in which a shelf board unit 50A in which the shelf board 5 and the lighting device 1 (1C, 1D) are integrated is provided in a plurality of stages.
　照明装置１（１Ｃ、１Ｄ）はコンパクトな構成であって上下幅も小さくできるので、観察者（商品の購入者）は、照明装置に邪魔されることなく商品の前面を良好に観察できる。また、背の高い商品であっても、棚板先端から上方に向かって照明する照明装置を用いることにより、商品のフェイス面、特に、下側まで良好に観察できる。さらに、棚板先端から上下に向かって照明する照明装置を用いることにより、商品のフェイス面および上側を良好に観察できる。 Since the lighting device 1 (1C, 1D) has a compact configuration and can have a small vertical width, an observer (a purchaser of the product) can observe the front of the product well without being disturbed by the lighting device. Further, even a tall product can be satisfactorily observed up to the face of the product, particularly the lower side, by using an illumination device that illuminates upward from the front end of the shelf board. Furthermore, by using an illuminating device that illuminates up and down from the front end of the shelf plate, it is possible to satisfactorily observe the face surface and upper side of the product.
　上側照明は、射出面近くに被照明物体の面が配置されることが多いため、広範囲に照明することが求められる。一方、下側照明は、照明装置が取り付けられる棚板の一段下の棚板に載置された物体の上部を照明するため、被照明物体と距離があることが多い。そのために、下側照明の配光中心を後ろ側に傾けることにより、棚板の奥まで並べられた物体を上側から照明することが可能となる。すなわち、物体表面を正面から照明すると同時に、上方から奥の方まで照明でき、棚に載置された商品などを容易に観察できる。 Since the surface of the object to be illuminated is often arranged near the exit surface, the upper illumination is required to illuminate a wide range. On the other hand, the lower side illumination often illuminates the upper part of the object placed on the shelf below the shelf to which the illumination device is attached, and therefore often has a distance from the object to be illuminated. Therefore, by tilting the light distribution center of the lower illumination to the rear side, it becomes possible to illuminate the objects arranged to the back of the shelf board from the upper side. In other words, the object surface can be illuminated from the front and simultaneously from the top to the back, so that products placed on the shelf can be easily observed.
　また、本発明に係る照明装置１（１Ａ～１Ｄ）は、商品側に向けて照明光を射出する第一射出面に透光性と防水性を有する防水カバーを設けているので、埃が入り込まない。また、防水カバーの傾きを、カバー材料のブリュースター角よりも大きな角度商品側に傾けることで、照明光を高効率で商品側に向けて配光制御でき、棚板上に陳列される商品を効率よく照明でき、観察者側に向かう光を低減することができる。そのために、観察者が眩しくなく、棚板に陳列する商品を効率的に照明可能な配光特性と、防水・防塵機能を有する照明装置を得ることができる。また、この照明装置を用いて、観察者が眩しくなく、商品を高効率に照明可能で水や埃が入り込まず、安定して照明可能な棚板ユニットおよびショーケースを得ることができる。 In addition, in the illumination device 1 (1A to 1D) according to the present invention, since a waterproof cover having translucency and waterproofness is provided on the first emission surface that emits illumination light toward the product side, dust enters. Absent. In addition, by tilting the waterproof cover toward the product side, which is larger than the Brewster angle of the cover material, it is possible to control the light distribution toward the product side with high efficiency, and to display the product displayed on the shelf board. Illumination can be performed efficiently, and light traveling toward the viewer can be reduced. Therefore, it is possible to obtain an illuminating device having a light distribution characteristic capable of efficiently illuminating a product displayed on a shelf board and a waterproof / dustproof function. Further, by using this lighting device, it is possible to obtain a shelf unit and a showcase that are not dazzling for the viewer, can illuminate the product with high efficiency, do not enter water and dust, and can be illuminated stably.
　また、導光経路を形成する反射面や入射面や射出面のいずれかを拡散面化して所定角度範囲に拡散する拡散部１４を設けることにより、光源（ＬＥＤ光源）の色ムラや照度ムラを改善し、より均一な高品位な照明装置を実現することができる。 In addition, by providing a diffusing portion 14 that diffuses a reflection surface, an incident surface, or an exit surface that forms a light guide path into a predetermined angle range, color unevenness or illuminance unevenness of a light source (LED light source) is reduced. It is possible to improve and realize a more uniform high-quality lighting device.
　また、棚板と照明装置を一体化した構成の棚板ユニットであれば、取り扱いが容易となって好ましい。また、この棚板ユニットを上下に複数段設けたショーケースであれば、棚板上に陳列された商品を棚板の上下から均一に照明可能となって好ましい。 Also, a shelf unit having a configuration in which the shelf and the lighting device are integrated is preferable because it is easy to handle. Moreover, if it is a showcase which provided this shelf board unit in multiple steps up and down, since the goods displayed on the shelf board can be illuminated uniformly from the upper and lower sides of a shelf board, it is preferable.
　また、光源として、高照度で、消費電力が小さく、発熱も小さいＬＥＤ光源を用いることで、高効率の棚板用の照明装置を実現することができる。 Also, by using an LED light source with high illuminance, low power consumption, and low heat generation as the light source, a highly efficient lighting device for a shelf can be realized.
　上記したように、本発明に係る照明措置は、光路中に導光体を配置して効率的に導光し、防水カバーを取り付け、防水カバーの射出面の傾きをブリュースター角以上に傾けることで、商品側を効率的に照明できる配光特性を有する。そのために、光の利用効率が高く、さらに商品側を効率的に照明可能な配光特性と、防水・防塵機能を併せ持つショーケースに好適な明装置となる。 As described above, the illumination measure according to the present invention is to guide the light efficiently by arranging the light guide in the optical path, attach the waterproof cover, and incline the exit surface of the waterproof cover more than the Brewster angle. Thus, it has a light distribution characteristic that can efficiently illuminate the product side. Therefore, the light device has a high light use efficiency and is a light device suitable for a showcase having both a light distribution characteristic capable of efficiently illuminating the product side and a waterproof / dustproof function.
　そのために、本発明に係る照明装置は、上下に複数の棚板を備える多段式のショーケースに用いる照明装置に好適に適用することができる。 Therefore, the lighting device according to the present invention can be suitably applied to a lighting device used in a multistage showcase having a plurality of shelf boards on the top and bottom.
　　　１～１Ｄ　　照明装置
　　　２　　光源（ＬＥＤ光源）
　　　３Ａ～３Ｄ　導光体
　　　５　　棚板
　　　７～７Ｄ　　防水カバー
　　１１　　第一反射面
　　１２　　第二反射面
　　１３　　フレーム
　　１４　　拡散部
　　２１　　基板
　　３１　　入射面
　　３２～３２Ｄ　　第一射出面
　　５０、５０Ａ　棚板ユニット
　　ＳＣ　　ショーケース 1-1D lighting device 2 Light source (LED light source)
3A to 3D Light guide 5 Shelf 7 to 7D Waterproof cover 11 First reflecting surface 12 Second reflecting surface 13 Frame 14 Diffusing portion 21 Substrate 31 Incident surface 32 to 32D First emitting surface 50, 50A Shelf unit SC Showcase

Claims (11)

  1. 棚板の先端に装着され、前記棚板の正面から観察した時の幅方向に沿って配設される光源と、該光源から出射された光が入射する入射面と、該入射面から入射した光を前記幅方向と直交する方向に導光する導光経路と、導光された光を前記棚板上に陳列された商品側に向けて射出する第一射出面と、を備える導光体を有し、前記棚板上に陳列される商品を照明する照明装置であって、
    　前記導光体は、前記導光経路を形成する相対向した第一面と第二面とを有し、前記第一射出面側に、空気層を挟んで透光性と防水性を有する防水カバーを設置し、当該防水カバーの外面を前記商品側に向かって傾斜させ、前記導光経路を介して導光される導光方向と、前記防水カバーの外面の垂線との成す角度θ１を、前記防水カバーのブリュースター角よりも大きな角度としたことを特徴とする照明装置。     A light source mounted at the tip of the shelf and disposed along the width direction when observed from the front of the shelf, an incident surface on which light emitted from the light source is incident, and an incident surface from the incident surface A light guide comprising: a light guide path that guides light in a direction orthogonal to the width direction; and a first exit surface that emits the guided light toward a product side displayed on the shelf board. A lighting device for illuminating a product displayed on the shelf board,
    The light guide has a first surface and a second surface that face each other to form the light guide path, and has a light-transmitting property and a waterproof property with an air layer interposed between the first light-emitting surface side and the first light-emitting surface. A cover is installed, the outer surface of the waterproof cover is inclined toward the product side, and an angle θ1 formed by a light guide direction guided through the light guide path and a perpendicular line of the outer surface of the waterproof cover, An illuminating device characterized in that the angle is larger than the Brewster angle of the waterproof cover.
  2. 前記導光経路を介して導光される導光方向と、前記第一射出面の垂線とのなす角θ２をブリュースター角よりも大きな角度で、前記商品側に傾けたことを特徴とする請求項１に記載の照明装置。 An angle θ2 formed by a light guide direction guided through the light guide path and a perpendicular to the first exit surface is inclined to the product side at an angle larger than a Brewster angle. Item 2. The lighting device according to Item 1.
  3. 前記第一面の外側に空気層を挟んで第一反射面を設け、前記第二面外側に空気層を挟んで第二反射面を設けたことを特徴とする請求項１または２に記載の照明装置。 The first reflective surface is provided outside the first surface with an air layer interposed therebetween, and the second reflective surface is provided outside the second surface with an air layer interposed therebetween. Lighting device.
  4. 前記θ１およびθ２は８０°よりも小さいことを特徴とする請求項２または３に記載の照明装置。 The lighting device according to claim 2 or 3, wherein the θ1 and θ2 are smaller than 80 °.
  5. 前記θ２を前記θ１よりも大きな角度とし、形成された空間部に前記防水カバーを保持する筐体を配置したことを特徴とする請求項２から４のいずれかに記載の照明装置。 5. The lighting device according to claim 2, wherein the θ <b> 2 is set to an angle larger than the θ <b> 1, and a housing that holds the waterproof cover is disposed in the formed space portion.
  6. 前記第一面の前記第一射出面に近接した領域に所定の拡散特性を有する拡散部を設けたことを特徴とする請求項１から５のいずれかに記載の照明装置。 6. The lighting device according to claim 1, wherein a diffusion part having a predetermined diffusion characteristic is provided in a region of the first surface adjacent to the first emission surface.
  7. 前記導光体は、前記光源からの光を異なる二方向に分岐する光路分岐部を備え、前記導光経路として、前記光を、前記第一射出面に向けて導光する第一導光経路と、該第一導光経路と逆方向に導光する第二導光経路を有することを特徴とする請求項１から６のいずれかに記載の照明装置。 The light guide includes an optical path branching unit that branches light from the light source in two different directions, and the light guide path guides the light toward the first exit surface as the light guide path. And an illumination device according to claim 1, further comprising a second light guide path that guides light in a direction opposite to the first light guide path.
  8. 前記導光体は前記棚板の正面から観察した時の幅方向に複数に分割され、前記防水カバーは前記幅方向に一体に形成されていることを特徴とする請求項１から７のいずれかに記載の照明装置。 The said light guide is divided | segmented into multiple in the width direction when it observes from the front of the said shelf board, The said waterproof cover is integrally formed in the said width direction, Either of Claim 1 to 7 characterized by the above-mentioned. The lighting device described in 1.
  9. 前記光源は、前記棚板の正面から観察した時の幅方向に沿って配設される複数のＬＥＤ光源からなることを特徴とする請求項１から８のいずれかに記載の照明装置。 The illumination device according to any one of claims 1 to 8, wherein the light source includes a plurality of LED light sources arranged along a width direction when observed from the front of the shelf board.
  10. 請求項１から９のいずれかに記載した照明装置を先端部に設けたことを特徴とする棚板ユニット。 A shelf unit comprising the lighting device according to any one of claims 1 to 9 provided at a tip portion.
  11. 請求項１０に記載された棚板ユニットを複数段備えたことを特徴とするショーケース。 A showcase comprising a plurality of the shelf board units according to claim 10.
PCT/JP2012/062917 2011-06-01 2012-05-21 Illumination device, shelf board unit provided with illumination device, and showcase WO2012165190A1 (en)

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FR3032872A1 (en) * 2015-02-24 2016-08-26 S2F Flexico DEVICE FOR PRESENTATION AND DISTRIBUTION OF ARTICLES COMPRISING A LIGHTNING THRUST
WO2018075662A3 (en) * 2016-10-18 2018-05-31 Retail Space Solutions Llc Illuminated merchandiser, retrofit kit and related methods
JP2018130146A (en) * 2017-02-13 2018-08-23 株式会社オカムラ Merchandise display rack
US10130196B2 (en) 2014-08-07 2018-11-20 Artform International Limited Product display shelf, system and method
US10405674B2 (en) 2016-03-23 2019-09-10 Retail Space Solutions Llc Low product indicator for self facing merchandiser and related methods
US10702076B2 (en) 2016-01-18 2020-07-07 Atlas Bolt & Screw Company Llc Sensors, devices, adapters and mating structures for merchandisers and related methods
EP4119841A1 (en) * 2021-07-13 2023-01-18 Kohler Co. Mirror and cabinet apparatus

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JP2004073763A (en) * 2002-08-12 2004-03-11 Sendak Corp Lighting equipment for shelf stage of showcase
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US10130196B2 (en) 2014-08-07 2018-11-20 Artform International Limited Product display shelf, system and method
US10470594B2 (en) 2014-08-07 2019-11-12 Artform International Limited Product display shelf, system and method
FR3032872A1 (en) * 2015-02-24 2016-08-26 S2F Flexico DEVICE FOR PRESENTATION AND DISTRIBUTION OF ARTICLES COMPRISING A LIGHTNING THRUST
US10702076B2 (en) 2016-01-18 2020-07-07 Atlas Bolt & Screw Company Llc Sensors, devices, adapters and mating structures for merchandisers and related methods
US10405674B2 (en) 2016-03-23 2019-09-10 Retail Space Solutions Llc Low product indicator for self facing merchandiser and related methods
US10588427B2 (en) 2016-03-23 2020-03-17 Retail Space Solutions Llc Low product indicator for self facing merchandiser and related methods
US11291312B2 (en) 2016-03-23 2022-04-05 Retail Space Solutions Llc Low product indicator for self facing merchandiser and related methods
WO2018075662A3 (en) * 2016-10-18 2018-05-31 Retail Space Solutions Llc Illuminated merchandiser, retrofit kit and related methods
US10952548B2 (en) 2016-10-18 2021-03-23 Retail Space Solutions Llc Illuminated merchandiser, retrofit kit and related methods
JP2018130146A (en) * 2017-02-13 2018-08-23 株式会社オカムラ Merchandise display rack
EP4119841A1 (en) * 2021-07-13 2023-01-18 Kohler Co. Mirror and cabinet apparatus

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