JP2009224157A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting apparatus improved in maintenance performance. <P>SOLUTION: The lighting fixture is provided with a reflecting shade 2 of which the shape of reflection face is formed in curved shape with the upper side convex and which distributes light of the lamp downward and two pieces of louvers 3, 3 which are arranged respectively along the lamp axis to the lower side of the lamp 4 and are arranged on both sides in width direction of the lamp 4 with an spacing at least larger than the diameter of the lamp 4. Each louver 3 is respectively installed integrally with the reflecting shade 2 at both end parts in the longitudinal direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting fixture.

  Conventionally, various lighting fixtures provided with a louver for cutting glare of a lamp have been provided (see, for example, Patent Document 1).

FIG. 4 shows an example of a lighting fixture provided with a louver, and a louver 103 formed in a lattice shape along the longitudinal direction below the lamp 104 attached to the fixture main body 101 via a lamp socket 108. Is arranged.
Japanese Patent Laying-Open No. 2005-11756 (paragraph [0017] -paragraph [0020] and FIGS. 1 to 4)

  In the luminaire shown in FIG. 4 described above, the louver 103 is formed in a lattice shape in order to cut the glare from the width direction and prevent the louver 103 from bending, and the louver 103 is used when the lamp 104 is replaced. Had to be removed and maintenance was not good.

  This invention is made | formed in view of the said problem, The place made into the objective is to provide the lighting fixture which improved the maintainability.

  According to the first aspect of the present invention, there is provided a reflective shade that distributes the light of the lamp to the front side and a lamp shaft that is disposed in front of the lamp along the lamp axis, and at least a space larger than the diameter of the lamp. And a plurality of louvers arranged on both sides of the first and second louvers.

  According to a second aspect of the present invention, each louver includes a main light-shielding portion disposed along the front-rear direction, and a folding portion that is folded back obliquely from the front end of the main light-shielding portion toward the lamp side. The portion is bent toward the main light shielding portion with respect to a line segment connecting the bending position and the center of the lamp.

  According to a third aspect of the present invention, the reflecting shade is provided with a first flat portion at a rear position of the lamp, and each louver extends along the first flat portion from the rear end of the main light shielding portion toward the lamp side. The second flat surface portion is provided.

  The invention of claim 4 is characterized in that the louvers are arranged so that the distance between the tips of the folded portions is at least larger than the diameter of the lamp.

  According to the invention of claim 1, the plurality of louvers are arranged along the lamp axis in front of the lamp, and are arranged on both sides of the lamp at a distance larger than the diameter of the lamp. Since the lamp can be exchanged from the louver while cutting the glare, there is no need to remove the louver as in the conventional example, and there is an effect that the maintainability can be improved.

  According to the second aspect of the present invention, the folded light portion folded back from the front end of the main light shielding portion toward the lamp side is folded toward the main light shielding portion side with respect to the line segment connecting the folding position and the center of the lamp, thereby allowing the light of the lamp. Can be emitted to the folded portion, and the amount of light forward can be increased by reflecting this light at the folded portion. Moreover, since the strength of the louver is increased by providing the folded portion with respect to the main light shielding portion, there is also an effect that the louver can be prevented from being bent.

  According to the invention of claim 3, by providing the first flat portion on the reflective shade and providing the second flat portion extending along the first flat portion on each louver, the light of the lamp is first and second. Since the amount of light reflected from the flat surface portion can be increased to the main reflecting surface of the reflecting shade, the amount of light reflected from the main reflecting surface toward the main light-shielding portion of each louver can be increased. . In addition, when the reflective shade is attached to the instrument main body via the first flat portion, the reflective shade is attached to the instrument main body by the surface, so that the attachment becomes strong, and the shake and wobble of the reflective shade are reduced. There is an effect that can be.

  According to the invention of claim 4, each louver is arranged so that the interval between the tips of the folded portions is at least larger than the diameter of the lamp, and the lamp can be exchanged between the louvers. Thus, there is no need to remove the louver, and there is an effect that the maintainability can be improved.

  An embodiment of the present invention will be described with reference to FIGS. The lighting fixture of this embodiment is attached to a ceiling surface via the fixing bolt 13 as shown in FIG. 2, and is used in order to illuminate the room (for example, a factory etc.). In the following description, the direction of the arrow ab in FIG. 2 will be described as the vertical direction and the direction of the arrow cd as the horizontal direction unless otherwise specified.

  As shown in FIG. 2, the lighting fixture of the present embodiment includes a straight tube type lamp 4, a fixture body 1 in which a ballast 11 for supplying lighting power to the lamp 4 is incorporated, and the light from the lamp 4 is reflected downward. And a plurality of (two in this embodiment) louvers 3 for preventing glare of the lamp 4 from the width direction.

  As shown in FIG. 2, the instrument body 1 has a case body 1a formed in an elongated, substantially rectangular box shape that extends in the left-right direction and has an open bottom surface. 4 are connected in a state where the connection surfaces 8a face each other. Further, a projecting base portion 5 projecting downward is provided inside each lamp socket 8, and a screw hole 5 a into which a fixing screw 6 is screwed is provided at the bottom of each projecting base portion 5. Screw insertion holes 1b through which the fixing bolts 13 are inserted are respectively penetrated inside the protrusions 5.

  Furthermore, a terminal block 10 to which each electric wire of the cable 14 is connected is housed in the center of the instrument body 1 in the left-right direction, and a ballast 11 that supplies lighting power to the lamp 4 on the right side of the terminal block 10. Is stored. The output end of the terminal block 10 and the input end of the ballast 11 are electrically connected by an electric wire (not shown), and the output end of the ballast 11 and each lamp socket 8 are also electrically connected by an electric wire (not shown). It is connected. Thus, the commercial power supplied by the cable 14 is supplied to the ballast 11 via the terminal block 10, and the lighting power of the lamp 4 is supplied from the ballast 11 to each lamp socket 8. . Further, a wire insertion hole (not shown) is provided in a portion corresponding to the terminal block 10 in the case main body 1a of the instrument main body 1, and each electric wire of the cable 14 is connected to the terminal block 10 from the upper side through the wire insertion hole. It can be done.

  As shown in FIG. 2, the lamp 4 has a straight tubular arc tube 4a extending in the left-right direction, and a cap portion 4b having a pair of lamp pins 4c projecting from both ends of the arc tube 4a in the left-right direction. Is provided.

  As shown in FIGS. 1 and 2, the reflecting shade 2 has a box-shaped reflecting shade main body 2a which is formed in a curved shape having a long shape extending in the left-right direction and a bottom surface protruding upward. In the bottom surface of the reflective shade main body 2a, a projecting portion 2c protruding upward is integrally provided along the left-right direction at substantially the center in the width direction. In addition, screw insertion holes 2b through which the fixing screws 6 are inserted are respectively penetrated at portions corresponding to the respective screw holes 5a in the bottom surface 2d of the projecting portion 2c. In addition, socket insertion holes (not shown) through which the lamp sockets 8 are respectively inserted are provided at both left and right ends of the reflective shade main body 2a. The lamp socket 8 is arranged inside the reflective shade 2 through the socket insertion hole (see FIG. 1). Here, the projecting portion 2c is provided at a position where the bottom surface 2d is horizontal in the mounted state, and the first flat surface portion is constituted by the bottom surface 2d. Further, the width dimension of the bottom surface 2d of the projecting part 2c is preferably set to be larger than the diameter of the lamp 4 and equal to or less than the width dimension of the case body 1a. The same width dimension d2 is set. Here, the main reflective surface 2e is comprised by the remaining site | parts except the bottom face 2d of the protrusion part 2c among the reflective surfaces of the reflective shade 2. As shown in FIG.

  As shown in FIGS. 1 and 2, the louver 3 includes a rectangular plate-shaped main light shielding piece 3a (main light shielding portion) arranged along the vertical direction, and a lamp from the lower end (front end) of the main light shielding piece 3a. From the upper side end (rear side end) of the main light-shielding piece 3a to the lamp 4 side (right side in FIG. 1), the folded piece 3b (folded portion) folded obliquely toward the 4 side (upper side in FIG. 1). A horizontal piece 3c extending horizontally is formed integrally. Each louver 3 is arranged below the lamp 4 along the lamp axis, and is arranged on both sides in the width direction of the lamp 4 so that the folded pieces 3b face each other. It is provided integrally. That is, the louvers 3 and 3 are arranged so that the folded pieces 3b and 3b are substantially C-shaped (see FIG. 1). Here, the folded piece 3b of each louver 3 is bent toward the main light-shielding piece 3a with respect to a line segment AB connecting the bent portion from the main light-shielding piece 3a and the center of the lamp 4, as shown in FIG. Further, the distance between the tips (upper ends in FIG. 1) of the folded pieces 3b (hereinafter referred to as inter-louver dimensions) is set to d1. Further, if the angle formed between the main light-shielding piece 3a and the folded piece 3b is reduced, the light of the lamp 4 reflected by the folded piece 3b is irradiated to the side to cause glare, so that the main light-shielding piece 3a and the folded piece 3b The angle formed is set to be larger than the angle at which glare occurs. Note that the inter-louver dimension d1 only needs to be set to a dimension that is at least larger than the diameter of the lamp 4, and is preferably set to a dimension that allows easy access (for example, about 50 mm). Here, the horizontal piece 3c extends along the bottom surface 2d (first flat surface portion) of the above-described protrusion 2c, and the horizontal flat piece 3c constitutes the second flat surface portion.

  Next, the construction procedure of the lighting fixture will be described with reference to FIG. In addition, the terminal block 10 and the ballast 11 are demonstrated as what is previously attached to the case main body 1a. First, after connecting each electric wire of the cable 14 to the terminal block 10, the fixing bolt 13 corresponding to each screw insertion hole 1b provided in the case main body 1a of the instrument main body 1 is inserted, and the washer 7 is inserted into the screw portion from the lower side. When the nut 9 is screwed together, the instrument body 1 is fixed to the ceiling surface. Thereafter, after each lamp socket 8 is inserted into the corresponding socket insertion hole, each fixing screw 6 is inserted into the corresponding screw insertion hole 2b and screwed into the screw hole 5a of the case body 1a. 2 is attached to the instrument body 1. Finally, when each cap portion 4b is attached to the corresponding lamp socket 8 and the lamp 4 is attached to the case body 1a, the assembly of the lighting fixture is completed. At this time, the lamp 4 is disposed between the louvers 3 and 3 in the width direction so that the lamp 4 cannot be seen when the luminaire is viewed from obliquely below in the width direction, and glare of the lamp 4 is prevented. The

  Here, operation | movement of the lighting fixture of this embodiment is demonstrated based on FIG. When the lighting power is supplied to the lamp 4 through the lamp socket 8, the lamp 4 is turned on, and a part of the light of the lamp 4 is directly irradiated downward (a chain line C in FIG. 3) and the louver 3 is turned back. Reflected by the piece 3b and irradiated downward (broken line F in FIG. 3), the remaining light is reflected by the reflecting surface of the reflecting shade 2 (one-dot chain line D and two-dot chain line E in FIG. 3). Here, in the present embodiment, the bottom surface 2d of the projecting portion 2c constituting the first flat portion is provided at the upper position (rear position) of the lamp 4 in the reflecting shade 2, and the upper side of the main light shielding piece 3a of the louver 3 is provided. The horizontal piece 3c which comprises a 2nd plane part is provided in the edge, and a part of light of the lamp | ramp 4 is reflected by the bottom face 2d. Then, a part of the light reflected by the bottom surface 2d is irradiated as it is, and the remaining part is reflected by the horizontal piece 3c toward the main reflecting surface 2e of the reflecting shade 2, and further reflected by the main reflecting surface 2e. The emitted light is reflected by the outer surface of the main light-shielding piece 3a of the louver 3 and irradiated downward (two-dot chain line E in FIG. 3).

  Thus, in the conventional lighting fixture, as shown in FIG. 4, the light from the lamp 104 is difficult to be applied to the side surface (the side surface in the left-right direction in FIG. 4), and the luminance of the side surface of the louver 103 is lowered. On the other hand, in the lighting fixture of the present embodiment, the light of the lamp 4 is reflected by the bottom surface 2d of the projecting portion 2c and the horizontal piece 3c of the louver 3 as described above to the main reflecting surface 2e of the reflecting shade 2. Since the amount of light can be increased, the amount of light reflected from the main reflecting surface 2e toward the main light-shielding piece 3a of each louver 3 can be increased. As a result, the luminance of the outer surface of the main light-shielding piece 3a can be reduced. Can be suppressed. Further, when there is no horizontal piece 3c, a part of the light of the lamp 4 is reflected by the inner surface of the louver 3 and becomes a loss, but by providing the horizontal piece 3c as in the present embodiment, the louver 3 can be reflected by the horizontal piece 3c toward the main reflecting surface 2e, and light loss can be reduced. Furthermore, when the space between the front end of the horizontal piece 3c and the front end of the folded piece 3b is blocked by a flat surface, all the light directed toward the inner surface of the louver 3 can be reflected, further reducing light loss. can do.

  In the lighting fixture of the present embodiment, the louvers 3 and 3 are disposed below the lamp 4 along the lamp axis, and the inter-louver dimension d1 (the distance between the tips of the folded pieces 3b) is set to at least the diameter of the lamp 4. By disposing the lamps 4 on both sides in the width direction of the lamp 4 in a state of being set at a larger interval, the lamps 4 can be exchanged from between the louvers 3 while cutting the glare of the lamps 4. There is no need to remove the battery, and maintenance can be improved.

  Further, by folding the folded piece 3b folded from the lower end of the main light-shielding piece 3a of the louver 3 toward the lamp 4 toward the main light-shielding piece 3a with respect to a line segment AB connecting the folding position and the center of the lamp 4, Since the light from the lamp 4 can be applied to the folded piece 3b, the amount of light downward can be increased by reflecting this light on the folded piece 3b (broken line F in FIG. 3). Moreover, since the strength of the louver 3 is increased by providing the folded piece 3b with respect to the main light-shielding piece 3a of the louver 3, the bending of the louver 3 can be suppressed.

  Further, in the present embodiment, the bottom surface 2d (first flat surface portion) of the projecting portion 2c is provided horizontally, and the reflection shade 2 is attached to the instrument body 1 using the screw insertion hole 2b formed on the bottom surface 2d. Since it is attached, the reflective shade 2 is attached to the instrument main body 1 with the surface in the attached state, so that the attachment becomes strong, and shaking and wobble of the reflective shade 2 can be reduced. Furthermore, by setting the radius of curvature of the main reflecting surface 2e of the reflecting shade 2 large as in the lighting fixture of the present embodiment, the glare of the lamp 4 is suppressed using the louver 3, and a wide light distribution is achieved. The resulting lighting fixture can be provided.

  In the present embodiment, the case where the two louvers 3 are provided has been described as an example. However, the louvers 3 may be arranged on both sides of the lamp 4 and may be three or more.

It is sectional drawing of the lighting fixture of this embodiment. It is an exploded perspective view same as the above. It is explanatory drawing explaining operation | movement same as the above. It is sectional drawing of the lighting fixture of a prior art example.

Explanation of symbols

2 Reflecting shade 3 Louver 4 Lamp

Claims (4)

  Reflecting shades that distribute the light of the lamp to the front side, and arranged along the lamp axis in front of the lamp, and arranged on both sides of the lamp with a gap at least larger than the diameter of the lamp. And a plurality of louvers provided integrally with the reflective shade.   Each louver includes a main light-shielding portion disposed along the front-rear direction, and a folded portion that is folded back from the front end of the main light-shielding portion toward the lamp side, and the folded portion is a folding position. 2. The lighting fixture according to claim 1, wherein the lighting fixture is bent toward the main light shielding portion with respect to a line segment connecting the center of the lamp and the lamp.   The reflective shade is provided with a first flat portion at a rear position of the lamp, and each louver extends along the first flat portion from the rear end of the main light shielding portion toward the lamp. The lighting apparatus according to claim 2, wherein a second flat portion is provided.   4. The lighting apparatus according to claim 2, wherein the louvers are arranged so that a distance between tips of the folded portions is at least larger than a diameter of the lamp. 5.

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