JP2007273385A - Lighting apparatus and lighting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve efficiency of an apparatus while improving brightness feeling of the space by securing efficiently illumination intensity on the wall face. <P>SOLUTION: A shade 5 is provided with a bottom face portion on which a translucent opening 55 for a floor face is formed, a pair of side face portions on which a translucent opening 57 for wall face is formed respectively, and a pair of light shading parts 50, 50 which are installed between each of the translucent opening 57 for wall face and the translucent opening 55 for the floor face and cut off the light emitted from straight tube lamps 2, 2. By this shade 5, the light is emitted so that the total luminous flux in the range of perpendicular angles 0° to 45° may be 35% or more and less than 70% of the whole luminous flux and the luminous flux of direct radiation light may be 18% or more of the whole luminous flux, and the total luminous flux in the range of perpendicular angles 45° to 60° may be 10% or less of the whole luminous flux, and the total luminous flux in the range of perpendicular angles of 60° to 120° may be 30% or more and less than 65% of the whole luminous flux and the luminous flux of straight radiation light may be 15% or more of the whole luminous flux. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting fixture and a lighting method.

  Conventionally, this type of lighting fixture is installed on the ceiling surface of an indoor space, and irradiates the entire interior while performing glare cutting on a part of the room. In general, there are many lighting fixtures in which a downward opening and a lateral opening are formed to distribute light, and for example, by reducing the vertical distance from the downward opening to the lamp, most of the efficiency of the fixture is reduced to the lower luminous flux. Secured.

Patent Document 1 discloses an indoor lighting fixture that is installed on a ceiling in a house and has a configuration that increases the total luminous flux in a range from a vertical angle of 10 ° to 60 °.
Japanese Unexamined Patent Publication No. 2000-90708 (pages 3 and 4 and FIG. 1)

  In order to improve the brightness of the indoor space, it has become clear that it is necessary to ensure not only floor illuminance and ceiling surface illuminance but also wall illuminance.

  However, the above-mentioned conventional lighting fixtures are difficult to secure the light for illuminating the wall surface, and even if the illumination device has a light distribution for illuminating the wall surface, the efficiency of the fixture is poor. There is a problem that a large number of lighting fixtures must be installed to improve the performance.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a lighting apparatus and a lighting method with high efficiency of an apparatus while efficiently ensuring wall surface illuminance and improving a sense of brightness in space. Is to provide.

  The invention of the lighting device according to claim 1 is a lighting device installed on a ceiling surface, and includes a lighting load that is a straight tube type and is held along an axial direction along the ceiling surface, from the axial direction. Of the relationship between the vertical angle whose origin is the intersection of the vertical line passing through the center of the installation area of the ceiling surface and the horizontal line passing through the center of the lighting load, and the total luminous flux of the light emitted from the lighting load The total luminous flux in the vertical angle range of 0 ° to 45 ° is 35% to less than 70% of the total luminous flux, and the direct light luminous flux is 18% or more of the total luminous flux, and the vertical angle is 45 ° to 60 °. The total luminous flux in the range up to 10% is less than 10% of the total luminous flux, the total luminous flux in the range of the vertical angle of 60 ° to 120 ° is 30% to less than 65% of the total luminous flux, and the direct luminous flux is the total luminous flux. It is characterized by being 15% or more of the luminous flux.

  According to this configuration, it is possible to ensure the brightness of the floor surface, ceiling surface, and wall surface by efficiently irradiating light to the floor surface, ceiling surface, and wall surface direction. While suppressing the irradiation, it is possible to secure a feeling of brightness in the space and improve the efficiency of the appliance.

  The invention of the lighting device according to claim 2 is the invention according to claim 1, wherein the lower surface portion in which the floor surface light-transmitting region is formed and the pair of side surfaces in which the wall surface light-transmitting region is formed respectively. And a pair of light-shielding portions provided between each of the wall-surface light-transmitting regions and the floor-surface light-transmitting region and blocking light emitted from the illumination load. According to this configuration, only a total luminous flux of 10% or less of the total luminous flux is radiated from the light shielding portion corresponding to a vertical angle range of 45 ° to 60 °, and a floor corresponding to a vertical angle range of 0 ° to 45 °. A total luminous flux of 35% or more and less than 70% of the total luminous flux is emitted from the surface translucent area, and 30% or more and less than 65% of the total luminous flux from the wall translucent area corresponding to a vertical angle range of 60 ° to 120 °. The total luminous flux can be emitted.

  According to a third aspect of the present invention, there is provided the lighting device according to the second aspect, wherein each of the light shielding portions is movable, and at least one of the floor surface light transmitting region and the wall surface light transmitting region. It is characterized by a change in size. According to this configuration, the light shielding range can be finely adjusted in response to a shift in the position of a target to be shielded, such as a patient on a bed.

The invention of the lighting device according to claim 4 is the invention according to claim 2 or 3, wherein the light shielding portion has a luminance of 1000 when the light shielding portion is viewed from a direction from the vertical angle of 45 ° to 60 °. ˜3000 cd / m ² . According to this configuration, the contrast between light and darkness between the light-shielding part and the periphery of the light-shielding part is reduced, so that glare from the lighting fixture can be reduced.

  The invention of the lighting device according to claim 5 is the lighting device installed on the ceiling surface of the hospital room where the bed is placed in the invention of claim 1 or 2, wherein the total luminous flux irradiating the floor surface is 35% or more and less than 70% of the total luminous flux, the total luminous flux that irradiates the bed surface is 10% or less of the total luminous flux, and the total luminous flux that illuminates the wall surface and the ceiling surface is 30% or more and 65% of the total luminous flux. It is characterized by being less than. According to this configuration, the brightness of the entire hospital room can be enhanced by irradiating the floor, ceiling, and wall with light while suppressing glare for the patient on the bed.

  The invention of the lighting method according to claim 6 is an illumination method in which the lighting device according to any one of claims 1 to 4 is used by being installed on a ceiling surface of a hospital room where a bed is placed, wherein the lighting load is used. Of the total luminous flux emitted from the light, the total luminous flux that irradiates the floor is 35% or more and less than 70% of the total luminous flux, the total luminous flux that irradiates the bed surface is 10% or less of the total luminous flux, the wall surface and the ceiling surface The hospital room is irradiated such that the total luminous flux to irradiate is 30% or more and less than 65% of the total luminous flux. According to this method, the brightness of the entire hospital room can be enhanced by irradiating the floor surface, ceiling surface, and wall surface with light while suppressing glare for the patient on the bed.

  According to the present invention, it is possible to efficiently irradiate light with respect to the floor surface, ceiling surface, and wall surface direction while suppressing irradiation of light in some directions. By ensuring the brightness of the space, it is possible to ensure a sense of brightness of the space and improve the efficiency of the appliance.

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS. 1-3 is a figure which shows the structure of the lighting fixture of Embodiment 1. FIG. FIG. 4 is a light distribution curve diagram of the lighting apparatus of the first embodiment.

  First, the basic configuration of the first embodiment will be described. As illustrated in FIG. 1, the lighting fixture 1 of Embodiment 1 includes two straight tube lamps (lighting loads) 2 and 2, a lamp 3, a reflector 4, and a shade 5. The luminaire 1 is installed on a ceiling surface 6 of an indoor space such as a room.

  As shown in FIG. 1, each straight tube lamp 2 is, for example, a 32 W straight tube type fluorescent lamp, and is lit when high-frequency power is supplied from the lighting device 20, and the high-frequency power is supplied from the lighting device 20. Turns off when stopped. The lighting device 20 is formed by mounting a plurality of electronic components on a rectangular substrate with solder or the like. The lighting device 20 is electrically connected to a power source (not shown) on the input side and each socket 31 described later on the output side. And is electrically connected to the straight tube lamp 2. The substrate is, for example, a printed circuit board. The power source is, for example, a commercial power source and supplies AC power to the lighting device 20.

  As shown in FIG. 3, the lamp 3 includes a lamp body 30 and two pairs of sockets 31. The lamp body 30 is formed in a long and narrow box shape with a metal material such as a steel plate, for example, and has a rectangular bottom surface portion 300 facing the ceiling surface 6 (see FIG. 1), and along the longitudinal direction of the bottom surface portion 300. A pair of side surface portions 301 and 301 extending downward from both edges and a pair of socket bases 302 and 302 provided at both ends of the bottom surface portion 300 along the short direction. The lighting device 20 is installed on the bottom portion 300 (see FIG. 1). Each side portion 301 has an upper portion 320, a lower portion 321, a step portion 322 (see FIG. 1) provided between the upper portion 320 and the lower portion 321, and a U-shaped cross section extending downward from the lower end of the lower portion 321. The tip portion 323 (refer to FIG. 1) is coated with highly reflective white powder. Each socket base 302 includes an upper portion 330, an intermediate portion 331 extending downward from the outer edge of the upper portion 330, a convex lower portion 332 extending inward from the lower end of the intermediate portion 331, and an inner edge of the lower portion 332. And a fixed portion 333 having an L-shaped cross section extending upward from the top, and is coated with highly reflective white powder. A concave portion 334 is formed in the intermediate portion 331, and a through hole 335 is formed in the bottom surface of the concave portion 334. A through hole 336 is formed at the tip of the lower portion 332. A through hole 337 is formed at the tip of the fixing portion 333. Each socket base 302 is screwed and fixed to the bottom surface portion 300 by fitting a screw (not shown) into the through hole 337.

  Each of the two pairs of sockets 31 is formed of a resin such as polypropylene, for example, and is provided at the lower portion 332 of each socket base 302. As shown in FIG. 1, the two pairs of sockets 31... Hold the two straight tube lamps 2, 2 with the axial direction in the same direction along the ceiling surface 6.

  As shown in FIG. 3, the reflecting plate 4 is made of, for example, a metal material, and has a rectangular lower reflecting surface portion 40 and a longitudinal direction of the lower reflecting surface portion 40 (axial direction of the straight tube lamp 2). A pair of rectangular side reflection surface portions 41, 41 extending obliquely upward from both ends along the opposite sides and a pair of attachments provided on both edges along the short direction of the lower reflection surface portion 40 Parts 42 and 42. As shown in FIG. 1, the reflecting plate 4 has a lower reflecting surface portion 40 above the horizontal tangent a at the uppermost point of each straight tube lamp 2 when viewed from the longitudinal direction (axial direction of the straight tube lamp 2). Is provided. At this time, the dimensions between the straight tube lamp 2 and the reflector 4 are set in consideration of the combined dimensional accuracy obtained by synthesizing the dimensional accuracy in manufacturing of each component, and each component having the worst combined dimensional accuracy is obtained. Even if the dimensional accuracy is less, the gap is set so that some gap is formed between the straight tube lamp 2 and the reflector 4.

  The lower reflecting surface portion 40 is a horizontal plane and reflects light emitted from each straight tube lamp 2 downward when viewed from the axial direction of the straight tube lamp 2. Thereby, the light reflected by the lower reflective surface portion 40 can irradiate the floor surface through the floor surface transparent opening 55 described later. As shown in FIG. 3, a pair of through holes 400 and 400 are formed in the lower reflecting surface portion 40. As shown in FIG. 1, the reflecting plate 4 is screwed and fixed to the lamp 3 by fitting screws 43 into the through holes 336 and 400.

  Each of the pair of side reflecting surface portions 41 and 41 reflects light emitted from the straight tube lamp 2 to the side. As a result, the light reflected by each side reflecting surface portion 41 can illuminate the wall surface via the wall surface transparent opening 57 described later. At this time, each side reflecting surface portion 41 reflects light emitted from each straight tube lamp 2 at an angle of 20 ° or less from the horizontal line when viewed from the axial direction of the straight tube lamp 2. As shown in FIG. 3, each attachment portion 42 includes a bottom surface portion 420 provided in the short direction of the lower reflection surface portion 40 and a pair of side surfaces provided from the bottom surface portion 420 toward each side reflection surface portion 41. Parts 421 and 421. A pair of rectangular through holes 422 and 422 are formed in the bottom surface portion 420. The socket 31 is inserted into each through hole 422.

As shown in FIG. 1, the shade 5 includes a pair of light-shielding portions 50 and 50, a pair of first light distribution control portions 51 and 51, and a second portion provided near the center along the longitudinal direction. As shown in FIG. 3, a pair of both end portions 53 and 53 that connect between the light shielding portions 50 and a pair of joints provided above the both end portions 53 are provided. Parts 54 and 54. That is, as shown in FIG. 2, the shade 5 includes a lower surface portion 56 in which a floor surface transparent opening 55 is formed, and a pair of side surface portions 58 in which a wall surface transparent aperture 57 is formed, A pair of light shielding portions 50 provided between each of the wall surface light transmitting openings 57 and the floor surface light transmitting openings 55 are provided.
As shown in FIG. 1, each of the wall surface transparent openings 57 is a straight tube that is held closest to the wall surface transparent opening 57 in the straight tube lamp 2 when viewed from the axial direction of the straight tube lamp 2. The first vertical angle with the center of the tube lamp 2 as the origin is formed such that the lower end is 90 ° or less and the upper end is 135 ° or more.

  As shown in FIG. 3, each light shielding portion 50 is formed in a cross-sectional L shape with, for example, a metal material or resin, and extends inward from the rectangular side surface portion 500 and the lower end of the side surface portion 500. The lower surface part 501 provided is integrally provided. As shown in FIG. 1, each light shielding unit 50 blocks light emitted from each straight tube lamp 2. In particular, each light-shielding portion 50 has an angle of 20 ° or more with respect to the horizontal tangent of the uppermost point of the straight tube lamp 2 among the light emitted through the wall surface transparent opening 57 when viewed from the axial direction of the straight tube lamp 2. Block the light that makes

  Each of the first light distribution control units 51 and 51 is formed in a U-shaped cross section with, for example, a metal material or resin, and is provided on the inner side so as to face the light shielding unit 50. 510, an upper surface portion 511 extending outward from the upper end of the side surface portion 510, and a lower surface portion 512 extending outward from the lower end of the side surface portion 510 are integrally provided. Each of the first light distribution control units 51 and 51 is joined to the light shielding unit 50 by joining the lower surface parts 501 and 512. The second light distribution control unit 52 is formed of, for example, a metal material or resin in a V-shaped cross section, and integrally includes a left surface portion 520 and a right surface portion 521. The first light distribution control unit 51 and the second light distribution control unit 52 control downward irradiation by light emitted from each straight tube lamp 2. Specifically, when viewed from the axial direction of the straight tube lamp 2, the light emitted from the straight tube lamp 2 is blocked at an angle of less than 45 ° from the tangent to the straight tube lamp 2.

  As shown in FIG. 3, both end portions 53 are formed of, for example, a metal material or resin. Each joint portion 54 is formed of, for example, a metal material or resin, and has a bottom surface portion 540 and a pair of side surfaces extending inward from both edges along the vertical direction of the bottom surface portion 540. The unit 541 is integrally provided. A through hole 542 is formed in the bottom surface portion 540. The shade 5 is screwed and fixed to the lamp 3 by inserting screws (not shown) into the through holes 335 and 542.

  Next, the light irradiation in the lighting fixture 1 of Embodiment 1 is demonstrated using FIG. Here, the vertical angle has an origin at an intersection of a vertical line passing through the center of the installation area of the ceiling surface 6 and a horizontal line passing through the center of each straight tube lamp 2 when viewed from the axial direction of the straight tube lamp 2. Of the relationship between the total luminous flux of the light emitted from each straight tube lamp 2 and the vertical angle, the total luminous flux in the range of the vertical angle from 0 ° to 45 ° is 35% to less than 70% of the total luminous flux, and the direct luminous flux. Is 18% or more of the total luminous flux, the total luminous flux in the range of vertical angle 45 ° to 60 ° is 10% or less of the total luminous flux, and the total luminous flux in the range of vertical angle 60 ° to 120 ° is the total luminous flux. 30% or more and less than 65% and the luminous flux of direct light is 15% or more of the total luminous flux. More specifically, referring to FIG. 3, the light distribution of the luminaire 1 is 47% of the total luminous flux in the range from the vertical angle of 0 ° to 45 °, as shown in FIG. It is 33% of the total luminous flux in the range from ° to 120 °. On the other hand, it is 6% of the total luminous flux in the vertical angle range of 45 ° to 60 °. In addition, the efficiency of the appliance is 28% for the upper luminous flux and 54% for the lower luminous flux, and the total is as high as 82%. Further, the ratio of the luminous flux of the direct light is 19.4% in the range from the vertical angle 0 ° to 45 °, and 20.6% in the range from the vertical angle 60 ° to 120 °. The total is also very high at 40%. On the other hand, the ratio of the luminous flux of direct light in the conventional lighting fixture is as low as 19% or less.

  As described above, according to the first embodiment, the floor 5, the ceiling surface 6, and the wall surface direction are efficiently irradiated with light via the floor surface transparent opening 55 and the wall surface transparent opening 57 of the shade 5. Since the brightness of the surface, the ceiling surface 6 and the wall surface can be ensured, while the light shielding portion 50 can suppress the irradiation of light in some directions, the brightness of the entire space can be secured, Instrument efficiency can be improved. Further, only a total luminous flux of 10% or less of the total luminous flux is radiated from the light shielding portion 50 corresponding to the vertical angle range of 45 ° to 60 °, and the floor surface transparency corresponding to the vertical angle range of 0 ° to 45 °. A total luminous flux of 35% or more and less than 70% of the total luminous flux is radiated from the optical aperture 55, and is 30% or more and less than 65% of the total luminous flux from the wall surface transparent aperture 57 corresponding to a vertical angle range of 60 ° to 120 °. The total luminous flux can be emitted.

  A portion of the light emitted upward from each straight tube lamp 2 can be reflected downward by the lower reflecting surface portion 40 and the remaining portion can be reflected laterally by the side reflecting surface portion 41, so that the ceiling surface 6 and the wall surface The brightness of the floor and the brightness of the floor can be balanced. Further, since the lower reflecting surface portion 40 of the reflecting plate 4 is provided above the horizontal tangent a of the uppermost point of the straight tube lamp 2 when viewed from the axial direction of the straight tube lamp 2, it is located above each straight tube lamp 2. Can be reflected by the lower reflecting surface portion 40, and the light emitted from each straight tube lamp 2 in the direction of the wall surface can be reflected through the wall surface transparent opening 57 without colliding with the reflecting plate 4. Can be irradiated.

As a modification of the first embodiment, the light shielding part may be made of milky white acrylic. With such a configuration, the brightness of the light shielding portion can be ^{1000cd / m 2 ~3000cd / m 2} , since the contrast between light and shade in the surrounding of the light-shielding portion and the light shielding part is alleviated, from the luminaire Glare can be reduced.

As another modification of the first embodiment, the light shielding portion may be formed of a punching metal. With such a configuration, the brightness of the light shielding portion can be ^{1000cd / m 2 ~3000cd / m 2} , since the contrast between light and shade in the surrounding of the light-shielding portion and the light shielding part is alleviated, from the luminaire Glare can be reduced.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a diagram showing a hospital room in which a lighting device is installed.

  As shown in FIG. 5, the second embodiment is a form in which the luminaire 1 of the first embodiment is installed on the ceiling surface 6 of the central passage portion of the four-bed hospital room 60. The hospital room 60 of the second embodiment is a general hospital room having a frontage of 5.5 m to 6 m and a height from the floor surface 61 to the ceiling surface 6 of about 2.6 m. In this hospital room 60, four beds 63, 63 are placed along the wall surfaces 62, 62, and a patient 64 lies on each bed 63. The height of the bed 63 is about 60 cm.

  In the second embodiment, the hospital room 60 is divided into three regions, a device direct direction region 65, a patient direction region 66, and a device horizontal direction region 67, and a necessary light flux is set for each region. That is, the area 65 immediately below the instrument is in the range from 0 ° to 45 ° vertical, the patient direction area 66 is in the range from 45 ° to 60 °, and the horizontal area 67 is in the range from 60 ° to 120 ° vertical. The range is up to. In the second embodiment, the first light distribution control unit 51 and the second light distribution control unit 52 of the luminaire 1 set the glare cut angle at an angle of 45 ° close to the line of sight of the lying patient 64. ing.

  Here, in order to increase the brightness of the entire hospital room and suppress glare from the lighting device 1 to the patient 64, the ceiling surface 6 and the wall surfaces 62 and 62 have high brightness and illuminance, and the UGR value of the patient 64 is high. It needs to be 19 or less from the viewpoint. The UGR value is a limit value of discomfort glare from the lighting apparatus 1 determined by the International Commission on Illumination (CIE), and is set to 19 in a hospital room. In the second embodiment, the UGR value is 18.7, and the glare is appropriately limited.

  As described above, according to the second embodiment, the total luminous flux in the range of the second vertical angle from 0 ° to 45 ° is 35% or more and less than 70% of the total luminous flux, and the second vertical angle from 45 ° to 60 °. The luminaire 1 in which the total luminous flux in the range is 10% or less of the total luminous flux and the total luminous flux in the range from the second vertical angle 60 ° to 120 ° is 30% or more and less than 65% of the total luminous flux The glare is suppressed so that light is not directly applied to the eyes of the patient 64 lying on the bed 63, and light is applied to the wall surfaces 62, 62 and the ceiling surface 6 while ensuring the vertical light flux of the straight tube lamp 2. By irradiating, the feeling of brightness of the entire hospital room can be enhanced.

(Embodiment 3)
Embodiment 3 of the present invention will be described with reference to FIG. FIG. 6 is a diagram illustrating a hospital room in which a lighting device is installed.

  As shown in FIG. 6, the third embodiment is a form in which the luminaire 1 of the first embodiment is installed on the ceiling surface 6 of the central passage portion of the four-bed hospital room 60. The patient room 60 of the third embodiment is a general patient room having a frontage of 5.5 m to 6 m and a height from the floor surface 61 to the ceiling surface 6 of about 2.6 m. A patient (for example, height 1 m 70 cm, eye height 1 m 65 cm) 64 stands in this hospital room 60. In the third embodiment, the glare cut angle is set to an angle of 20 ° formed by the line of sight of the patient 64 standing by the light shielding portion 50 and the side reflection surface portion 41 (see FIG. 1) of the lighting fixture 1.

  As described above, according to the third embodiment, while ensuring a sense of brightness of the entire hospital room and improving the efficiency of the instrument, the light shielding unit 50 and the side reflection surface unit 41 (see FIG. 1) of the luminaire 1 are used in the patient room 60. The glare can be reduced by not directly irradiating the line of sight of the standing patient 64 or the like.

(Embodiment 4)
Embodiment 4 of the present invention will be described with reference to FIGS. 7-9 is a figure which shows the structure of the lighting fixture of Embodiment 4. FIG. FIG. 10 is a light distribution curve diagram of the lighting fixture of the fourth embodiment.

  First, the basic configuration of the fourth embodiment will be described. The lighting fixture 1a of Embodiment 4 is provided with the one straight tube | pipe lamp 2, the lamp | ramp 3a, the reflecting plate 4a, and the shade 5a, as shown in FIG. This lighting fixture 1a is installed on the ceiling surface 6 of the indoor space, similarly to the lighting fixture 1 of Embodiment 1 (see FIG. 1). The straight tube lamp 2 is the same as the straight tube lamp of the first embodiment.

  As shown in FIG. 9, the lamp 3 a includes a lamp body 30 a and a pair of sockets 31 and 31. The lamp body 30a includes a rectangular bottom surface portion 300a narrower than the bottom surface portion 300 (see FIG. 3) according to the first embodiment, a pair of side surface portions 301a, and the socket base 302 (see FIG. 3) according to the first embodiment. A pair of socket bases 302a and 302a having a narrow width are provided. Each socket 31 is provided at the lower part of the socket base 302 and holds the straight tube lamp 2 along the ceiling surface 6 in the axial direction as shown in FIG. The lamp 3a is the same as the lamp 3 (see FIG. 3) of the first embodiment except for the points described above.

  As shown in FIG. 9, the reflecting plate 4a includes a rectangular lower reflecting surface portion 40a having a narrower width than the lower reflecting surface portion 40 (see FIG. 3) of the first embodiment, and the longitudinal direction of the lower reflecting surface portion 40a (straight tube lamp 2). A pair of rectangular side reflection surface portions 41a extending obliquely upward from both ends along the axial direction), and side surface portions 44 extending upward from the upper ends of the side reflection surface portions 41a, And a pair of attachment portions 42a, 42a provided on both edges along the short direction of the lower reflection surface portion 40a. The reflector 4a is the same as the reflector 4 (see FIG. 3) of the first embodiment except for the points described above.

  The shade 5a includes a pair of light shielding portions 50a, 50a, a pair of first light distribution control portions 51a, and a pair of both end portions 53a, which are narrower than the both end portions 53 (see FIG. 3) of the first embodiment. 53a and a pair of joint portions 54a and 54a narrower than the joint portion 54 (see FIG. 3) of the first embodiment. That is, the shade 5a includes a lower surface portion 56 in which a floor surface transparent opening 55 is formed, a pair of side surface portions 58 in which a wall surface transparent aperture 57 is formed, and a wall surface transparent aperture 57, respectively. And a pair of light shielding portions 50a provided between the floor surface light transmitting openings 55. The shade 5a is the same as the shade 5 of the first embodiment (see FIG. 3) except for the above.

  Next, the light irradiation in the lighting fixture 1a of Embodiment 4 is demonstrated using FIG. As shown in FIG. 10, the light distribution of the luminaire 1a is 39% of the total luminous flux in the vertical angle range of 0 ° to 45 °, and 27% of the total luminous flux in the vertical angle range of 60 ° to 120 °. It is. On the other hand, it is 4% of the total luminous flux in the vertical angle range of 45 ° to 60 °. In addition, the efficiency of the appliance is 39% for the upper luminous flux and 42% for the lower luminous flux, and the total is as high as 81%.

  As described above, according to the fourth embodiment, the same effect as in the first embodiment can be obtained even in the case of one straight tube lamp 2.

(Embodiment 5)
Embodiment 5 of the present invention will be described with reference to FIG. FIG. 11 is a diagram showing a hospital room in which a lighting device is installed.

  In the fifth embodiment, as shown in FIG. 11, the lighting apparatus 1a according to the fourth embodiment is installed in a hospital room 60a. The hospital room 60a of the fifth embodiment is a general hospital room having a frontage of about 3.2 m and a height from the floor surface 61a to the ceiling surface 6a of about 2.6 m. A bed 63 is placed in the hospital room 60 a, and a patient 64 lies on the bed 63. The height of the bed 63 is about 60 cm.

  In the fifth embodiment, the hospital room 60a is divided into three regions, a device direct region 65a, a patient direction region 66a, and a device horizontal region 67a, and a necessary light flux is set for each region. In other words, the instrument direct direction region 65a is set to a range from 0 ° to 45 ° vertical angle, the patient direction region 66a is set to a range from vertical angle 45 ° to 60 °, and the instrument horizontal region 67a is set to a vertical angle 60 ° to 120 °. The range is up to. In the fifth embodiment, the glare cut angle is set to an angle of 45 ° close to the line of sight of the lying patient 64 by the first light distribution control unit 51a of the lighting fixture 1a.

  Here, in order to increase the brightness of the entire hospital room and suppress glare from the lighting equipment to the patient, the ceiling surface 6a and the wall surfaces 62a and 62a have high brightness and illuminance, and the UGR value is from the viewpoint of the patient 64. It needs to be 19 or less.

  In the fifth embodiment, when viewed from the axial direction of the straight tube lamp 2, the second vertical with the intersection point of the vertical line passing through the center of the installation area of the ceiling surface 6a and the horizontal line passing through the center of each straight tube lamp 2 as the origin. Of the relationship between the angle and the total luminous flux of the light emitted from each straight tube lamp 2, the total luminous flux in the second vertical angle range of 0 ° to 45 ° is 35% or more and less than 70% of the total luminous flux. The total luminous flux in the range from the second vertical angle 45 ° to 60 ° is 10% or less of the total luminous flux, and the total luminous flux in the range from the second vertical angle 60 ° to 120 ° is 30% or more of the total luminous flux. Less than 65%.

  As described above, according to the fifth embodiment, the first light distribution control unit 51a of the lighting apparatus 1a suppresses glare so that light is not directly applied to the eyes of the patient 64 lying on the bed 63 of the hospital room 60a, and the like. By securing light flux in the vertically downward direction of the straight tube lamp 2 and irradiating light on the side and obliquely upward, it is possible to enhance the sense of brightness of the entire hospital room.

(Embodiment 6)
Embodiment 6 of the present invention will be described with reference to FIG. FIG. 12 is an external perspective view of the lighting fixture of the sixth embodiment.

  As shown in FIG. 12, the luminaire 1b of Embodiment 6 includes two straight tube lamps 2, 2, a lamp 3b, a reflector 4b, and a shade 7. For example, the central passage section ceiling surface of a hospital room Etc. The straight tube lamp 2 is the same as the straight tube lamp of the first embodiment.

  The reflecting plate 4b includes a bottom surface portion 45 having an arc cross section and a protrusion 46 having a V-shaped cross section provided below the bottom surface portion 45, and is attached to the lamp 3b.

  The shade 7 includes a transparent panel 70, a light shielding fixing part 71, and a light shielding movable part 72. The transparent panel 70 is formed in a curved surface shape and covers the lamp 3b. The light-shielding fixing part 71 can be attached and detached at an arbitrary position on the transparent panel surface. The light shielding movable part 72 is movable, and can slide on the light shielding fixed part 71. Thereby, the magnitude | size of at least one of the translucent area | region 73 for floor surfaces, and the translucent area | region 74 for wall surfaces changes.

  As described above, according to the sixth embodiment, the light-shielding movable unit 72 can finely adjust the light-shielding range corresponding to the shift of the position of the target to be shielded, such as the patient on the bed.

(Embodiment 7)
Embodiment 7 of the present invention will be described with reference to FIG. FIG. 13 is an external perspective view of the lighting fixture of the seventh embodiment.

  As shown in FIG. 13, the lighting fixture 1 c of the seventh embodiment includes two straight tube lamps 2, 2, a lamp 3 b, and a reflection plate 4 b, and the lighting fixture 1 b of the sixth embodiment (see FIG. 12). Although equipped similarly, it has the following characterizing part which is not in the lighting fixture 1b of Embodiment 6.

The lighting fixture 1c according to the seventh embodiment includes a shade 7a as shown in FIG. 13 instead of the shade 7 according to the sixth embodiment. The shade 7a includes a transparent panel 70, a light shielding fixed portion 71a, and a light shielding movable portion 71a. The light-shielding fixed part 71a and the light-shielding movable part 72a are made of milky white acrylic. When the luminance of the light-shielding fixed part 71a and the light-shielding movable part 72a is viewed from the vertical angle of 45 ° to 60 °, 1000 cd / It is adjusted to be in the range of m ^{2 to} 3000 cd / m ² . The luminance of 1000 cd / m ² is close to the luminance of a louver of an OA room dedicated device that has been subjected to, for example, an antireflection treatment and focused on preventing reflection on the display, and it is difficult to feel glare from the lighting device 1c. On the other hand, the luminance of 3000 cd / m ² is close to the luminance of, for example, a louver of a UGR19-compatible instrument, and has moderate brightness that makes it difficult to feel glare. Thereby, it is suppressed that the contrast of brightness increases between the light-shielding fixed part 71a and the light-shielding movable part 72a and the transparent panel 70, and when the luminaire 1c is visually recognized from a direction from a vertical angle of 45 ° to 60 °. The contrast between light and darkness is reduced between the light shielding fixed portion 71a and the light shielding movable portion 72a and the surroundings. The shade 7a is the same as the shade 7 of the sixth embodiment (see FIG. 12) except for the above.

As described above, according to the seventh embodiment, the total luminous flux in the vertical angle range of 45 ° to 60 ° is 10% or less of the total luminous flux, and the luminance of the light shielding fixed portion 71a and the light shielding movable portion 72a is 1000 cd / m ² to. By setting the range to 3000 cd / m ² , the contrast between the light shielding fixed portion 71a and the light shielding movable portion 72a and the surroundings of the light shielding fixed portion 71a and the light shielding movable portion 72a is alleviated. Can be reduced.

(Embodiment 8)
An eighth embodiment of the present invention will be described with reference to FIG. FIG. 14 is an external perspective view of the lighting fixture of the eighth embodiment.

  As shown in FIG. 14, the lighting fixture 1d of the eighth embodiment includes two straight tube lamps 2, 2, a lamp 3b, and a reflector 4b, and the lighting fixture 1c of the seventh embodiment (see FIG. 13). Although equipped similarly, it has the following characterizing part which is not in the lighting fixture 1c of Embodiment 7.

  The lighting fixture 1d according to the eighth embodiment includes a shade 7b as shown in FIG. 14 instead of the shade 7a according to the seventh embodiment. The shade 7b includes a transparent panel 70, a light shielding fixed portion 71b, and a light shielding movable portion 72b. The light shielding fixed part 71b and the light shielding movable part 72b are formed of punching metal or the like. The shade 7b is the same as the shade 7a of the seventh embodiment (see FIG. 13) except for the above.

As described above, according to the eighth embodiment, the total luminous flux in the vertical angle range of 45 ° to 60 ° is 10% or less of the total luminous flux, and the luminance of the light shielding fixed portion 71b and the light shielding movable portion 72b is 1000 cd / m ² to. by the range of 3000 cd / ^{m 2,} since the contrast between light and shade in the surrounding shielding fixing portion 71b and the light blocking movable portion 72b and the light shielding fixing portion 71b and the light blocking movable portion 72b is relaxed, glare from lighting fixture 1d Can be reduced.

(Embodiment 9)
Embodiment 9 of the present invention will be described with reference to FIG. FIG. 15 is a cross-sectional view of the lighting apparatus of the ninth embodiment.

  As shown in FIG. 15, the lighting fixture 1e of the ninth embodiment includes two straight tube lamps 2 and 2, a lamp 3b, and a reflection plate 4b, and the lighting fixture 1c of the seventh embodiment (see FIG. 13). Although equipped similarly, it has the following characterizing part which is not in the lighting fixture 1c of Embodiment 7.

  The lighting fixture 1e according to the ninth embodiment includes a shade 7c as shown in FIG. 15 instead of the shade 7a according to the seventh embodiment. The shade 7c includes a transparent panel 70, a light shielding fixing portion 71c, and a light shielding movable portion 72c. The light shielding fixed portion 71c and the light shielding movable portion 72c are irradiated with slit light from a gap.

As described above, according to the ninth embodiment, the total luminous flux in the vertical angle range of 45 ° to 60 ° is 10% or less of the total luminous flux, and the luminance of the light shielding fixed portion 71c and the light shielding movable portion 72c is 1000 cd / m ² to. By setting the range to 3000 cd / m ² , the contrast between the light shielding fixed portion 71c and the light shielding movable portion 72c and the surroundings of the light shielding fixed portion 71c and the light shielding movable portion 72c is alleviated. Can be reduced.

(Embodiment 10)
A tenth embodiment of the present invention will be described with reference to FIG. FIG. 16 is a cross-sectional view of the lighting apparatus of the tenth embodiment.

  As shown in FIG. 16, the lighting fixture 1 f of the tenth embodiment includes two straight tube lamps 2, a reflecting plate 4 b, and a shade 7 in the same manner as the lighting fixture 1 b of the sixth embodiment (see FIG. 12). Although it has, it has the following characteristic part which is not in the lighting fixture 1b of Embodiment 6.

  The lighting fixture 1f of the tenth embodiment includes a lamp 3c that can move the straight tube lamp 2 in accordance with the movement of the light shielding movable portion 72.

  As described above, according to the tenth embodiment, the movement of the straight tube lamp 2 as well as the light shielding movable unit 72 causes a shift in the position of a target to be shielded, such as a patient on a bed, and the size of an indoor space such as a hospital room. Even if they are different, the light shielding range can be finely adjusted. Thereby, since the ratio of the light flux from each area | region can be made constant, a feeling of brightness can be raised effectively and a glare can be suppressed.

It is sectional drawing of the lighting fixture of Embodiment 1 by this invention. It is an external appearance perspective view of a lighting fixture same as the above. It is a disassembled perspective view of a lighting fixture same as the above. It is a light distribution curve figure of a lighting fixture same as the above. It is a figure in case a person is sleeping in the hospital room where the lighting fixture of Embodiment 2 by this invention was installed. It is a figure in case a person stands in the hospital room where the lighting fixture of Embodiment 3 by this invention was installed. It is sectional drawing of the lighting fixture of Embodiment 4 by this invention. It is an external appearance perspective view of a lighting fixture same as the above. It is a disassembled perspective view of a lighting fixture same as the above. It is a light distribution curve figure of a lighting fixture same as the above. It is a figure in case a person is sleeping in the hospital room where the lighting fixture of Embodiment 5 by this invention was installed. It is an external appearance perspective view of the lighting fixture of Embodiment 6 by this invention. It is an external appearance perspective view of the lighting fixture of Embodiment 7 by this invention. It is an external appearance perspective view of the lighting fixture of Embodiment 8 by this invention. It is sectional drawing of the lighting fixture of Embodiment 9 by this invention. It is sectional drawing of the lighting fixture of Embodiment 10 by this invention.

Explanation of symbols

2 Straight tube lamp 5 SEED 50 Light-shielding part 55 Light-transmitting opening for floor 57 Light-transmitting opening for wall

Claims (6)

A lighting fixture installed on the ceiling surface,
It is a straight tube type and includes an illumination load in which the axial direction is held along the ceiling surface,
A vertical angle whose origin is an intersection of a vertical line passing through the center of the installation area of the ceiling surface and a horizontal line passing through the center of the illumination load when viewed from the axial direction, and a total luminous flux of light emitted from the illumination load; Of the relationship
The total luminous flux in the vertical angle range of 0 ° to 45 ° is 35% or more and less than 70% of the total luminous flux, and the direct light luminous flux is 18% or more of the total luminous flux,
The total luminous flux in the range of the vertical angle from 45 ° to 60 ° is 10% or less of the total luminous flux,
A lighting apparatus, wherein a total luminous flux in a range of the vertical angle of 60 ° to 120 ° is 30% or more and less than 65% of the total luminous flux, and a direct light luminous flux is 15% or more of the total luminous flux.   A bottom surface portion on which a floor surface light transmitting region is formed, a pair of side surface portions each having a wall surface light transmitting region formed thereon, and between each of the wall surface light transmitting regions and the floor surface light transmitting region. The lighting fixture according to claim 1, further comprising: a shade provided with a pair of light shielding portions that are provided and shield light emitted from the illumination load.   The lighting device according to claim 2, wherein each of the light shielding portions is movable, and a size of at least one of the floor surface light transmitting region and the wall surface light transmitting region is changed. 4. The lighting apparatus according to claim ² , wherein the light shielding part has a luminance of 1000 to 3000 cd / m ² when the light shielding part is viewed from a direction from the vertical angle of 45 ° to 60 °. 5. A lighting device installed on the ceiling of a hospital room where a bed is placed,
The total luminous flux that irradiates the floor surface is 35% or more and less than 70% of the total luminous flux, the total luminous flux that irradiates the bed surface is 10% or less of the total luminous flux, and the total luminous flux that illuminates the wall surface and the ceiling surface is The lighting fixture according to claim 1, wherein the lighting fixture is 30% or more and less than 65% of the total luminous flux. A lighting method according to any one of claims 1 to 4, wherein the lighting device is used by being installed on a ceiling surface of a hospital room where a bed is placed,
Of the total luminous flux emitted from the illumination load, the total luminous flux that irradiates the floor is 35% or more and less than 70% of the total luminous flux, the total luminous flux that irradiates the bed surface is 10% or less of the total luminous flux, and the wall surface And the method of illuminating the patient room so that the total luminous flux irradiating the ceiling surface is 30% or more and less than 65% of the total luminous flux.

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