JP6212965B2 - Road lighting - Google Patents

Description

  The present invention relates to a road lighting device including a light emitting element as a light source.

  2. Description of the Related Art Conventionally, along with the increase in brightness of LEDs (light emitting elements), road lighting devices using LEDs as light sources have been developed (see, for example, Patent Document 1). Although this type of road lighting equipment can extend the life of the light source by using the LED as the light source, it is necessary to replace the LED once every several decades. The instrument case is provided freely.

JP 2011-187304 A

By the way, since the road lighting device is provided at a high place, it is desirable that the mounting plate can be easily attached and detached.
However, a road lighting fixture that takes into account the ease of attaching and detaching the mounting plate has not been proposed.
This invention is made | formed in view of the situation mentioned above, and aims at providing the lighting fixture for roads which can attach or detach an attachment board easily.

In order to achieve the above-described object, the present invention provides a mounting base on the bottom surface of a substantially rectangular instrument case, and a mounting plate having a light emitting element mounted on the mounting base in a removable manner. Both edges of the plate are extended to the inner wall of the instrument case in the width direction of the instrument case, and a guide portion for guiding the mounting plate along the inner wall is provided on the both edges. An opening for taking out the light of the element is provided in the front, the mounting base is formed in a substantially prismatic shape, and the mounting plate is supported on a plurality of the mounting bases so that the light emitting element is in the vicinity of the opening. The guide part is arranged to extend from the mounting plate to the bottom surface side beyond a contact surface between the mounting plate and the mounting base .
According to this configuration, since the guide portion of the mounting plate is guided along the inner wall of the instrument case when the mounting plate is attached / detached, the mounting plate can be easily attached / detached.

In the above-described configuration, the mounting plate and the guide portion are formed of a material having thermal conductivity, extend along the surface of the inner wall, and are configured as a heat radiating portion that transmits heat of the mounting plate to the inner wall. Also good.
According to this configuration, the heat of the light emitting element is radiated from the mounting plate and radiated to the inner wall through the guide portion, so that the light emitting element can be effectively cooled.

In the above-described configuration, the opening is an opening for attaching and detaching the mounting plate , and is configured to be hermetically sealed by placing a lid through a packing in the opening , and the guide portion includes the mounting plate. It may be formed by bending toward the bottom surface.
According to this configuration, it is possible to prevent the packing from peeling when the mounting plate is removed.

In the above configuration, the guide portion may be provided with a gap between the guide portion and the inner wall.
According to this structure, when attaching and detaching a mounting plate, it can prevent that a mounting plate contacts packing.

In the above-described configuration, the guide portion may be bent at the front end.
According to this structure, when attaching a mounting plate, it can prevent that a mounting plate contacts packing.

In the above-described configuration, the mounting plate may extend in the longitudinal direction of the instrument case and have gripping portions on both sides in the longitudinal direction.
According to this configuration, since the worker can grip the mounting plate in a natural posture, the mounting plate can be easily attached and detached.

  According to the present invention, both edges of the mounting plate are extended to the inner wall of the instrument case in the width direction of the instrument case, and the guide portions for guiding the mounting plate along the inner wall are provided on both edges. Since the guide portion of the mounting plate is sometimes guided along the inner wall of the instrument case, the mounting plate can be easily attached and detached.

It is a figure which shows the tunnel lighting fixture which concerns on embodiment of this invention, (A) is a front view, (B) is a side view, (C) is a bottom view. It is a figure which shows the installation state of a tunnel lighting fixture. It is a longitudinal cross-sectional view which shows the III-III cross section of FIG. FIG. 4 is a transverse cross-sectional view showing a IV-IV cross section of FIG. 1. It is a longitudinal cross-sectional view which shows the tunnel lighting fixture which concerns on this invention modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a tunnel lighting fixture is illustrated as an example of a road lighting fixture.
FIG. 1 is a view showing a tunnel lighting device 1 according to the present embodiment, in which FIG. 1 (A) is a front view, FIG. 1 (B) is a bottom view, and FIG. 1 (C) is a side view. FIG. 2 is a diagram illustrating an installation state of the tunnel lighting fixture 1. In the present specification, as shown in FIG. 1 (A), the direction facing vertically toward the front of the page is the front direction, the upper side and the lower side are the upper direction, the lower direction, the left side of the page, and The right side is defined as the left direction and the right direction.

Prior to the description of the configuration of the tunnel lighting device 1, the installation state of the tunnel lighting device 1 will be described. As shown in FIG. 2, the tunnel luminaire 1 is installed at predetermined intervals along the road 81 on the wall surface or ceiling surface (in this embodiment, the ceiling surface) of the tunnel 80 from which the road 81 extends. The road 81 has a road surface 82 defined by two roadway outer lines 82A and 82B extending in parallel. In the present embodiment, the tunnel lighting fixture 1 has the lamp optical axis G on the far side (at the position where it enters the road surface 82 by the width W1 from the nearest roadway 82A on the nearest side (near side) or retreats outside the road surface 82. It is installed on the ceiling surface of the tunnel 80 so as to be positioned on the near side or the far side by a width W2 from the roadway outer line 82B on the opposite side of the near side.
In the present specification, a direction in which the road 81 extends (a direction in which the vehicle travels) is defined as a longitudinal direction J, and a direction orthogonal to the longitudinal direction J is defined as a transverse direction M.

Next, the configuration of the tunnel lighting device 1 will be described.
As shown in FIG. 1, the tunnel lighting device 1 includes a device case 2 having an open front. The instrument case 2 is made of a material such as metal having excellent corrosion resistance and thermal conductivity, and is formed in a rectangular box shape that is long in the left-right direction. The front opening (opening) 7 has a flat front glass ( (Lid body) 3 is fitted. The front glass 3 is connected to the upper side 1A of the instrument case 2 by a pair of hinges 4 so as to be freely opened and closed, and is fastened to the lower side 1B of the instrument case 2 by a pair of latches 5. The front opening 7 of the instrument case 2 is provided with a packing 9 as a sealing member that seals between the front glass 3 along the opening edge 2A configured as a stepped portion. A metal fitting 6 for installing the instrument case 2 in the tunnel 80 (FIG. 2) is attached to the back surface (bottom surface) of the instrument case 2.
In this tunnel lighting device 1, the front glass 3 faces the road surface 82 (FIG. 2) of the road 81, and the left-right direction I that is the direction connecting the left side surface 1 </ b> C and the right side surface 1 </ b> D is aligned with the longitudinal direction J of the road 81. In the posture, it is installed in the tunnel 80.

In the instrument case 2, a light source unit 10, a power supply terminal block 11, and a power supply box 12 are housed.
The light source unit 10 uses an LED as an example of a light emitting element as a light source, and details thereof will be described later. The power terminal block 11 connects the wiring drawn in from the outside of the instrument case 2 and the wiring of the power supply box 12. The power supply box 12 generates DC power for driving the light source unit 10, and includes an AC-DC converter, converts commercial AC power supplied from the outside into DC power, and supplies the DC power to the light source unit 10. . Note that the power supply box 12 may vary the amount of light of the light source unit 10 by varying the DC power (for example, DC current) based on a dimming instruction from the outside. In addition, the appliance case 2 may incorporate a battery as an emergency power used in the event of a power failure. Electronic components such as the power supply terminal block 11 and the power supply box 12 are arranged below the light source unit 10.

3 is a longitudinal sectional view showing a section taken along the line III-III in FIG.
As illustrated in FIGS. 1 and 3, the light source unit 10 includes a plurality of light source units 30 and a mounting plate 40 to which the light source units 30 are attached.
As shown in FIG. 1A, the light source unit 30 includes a light emitting element module 31 and a reflector 32 surrounding the light emitting element module 31.

  The light emitting element module 31 is an LED having a chip-on-board (COB) structure in which a large number of LEDs are densely arranged on a substrate (not shown) to form a light emitting portion 35 having a substantially circular shape (which may be a quadrangle). It is a module. The planar light emitting portion 35 has an optical axis in a direction substantially perpendicular to the surface, and is housed in the instrument case 2 in a posture in which the optical axis F is directed in the front direction. The luminous intensity distribution of the light emitting element module 31 of the present embodiment spreads in a shape that is almost similar to a completely diffusing surface light source.

In general, an LED module having a chip-on-board structure has a large luminance and a high luminance and a large light output because a large number of LEDs are densely arranged.
Therefore, when the light source unit 30 includes the light emitting element module 31 in the light source, a light source unit with a large amount of light can be obtained.
In this embodiment, as shown in FIG.1 and FIG.3, the light source part 10 is provided with the eight light emitting element modules 31, and the increase in the further light quantity is aimed at. Specifically, two light emitting element modules 31 are vertically mounted on both upper and lower sides of a rectangular plate-like wiring board 36 to form a light emitting element module unit 37, and the four light emitting element module units 37 are mounted side by side. It is arranged on the surface of the plate 40. The wiring board 36 is made of a material, such as a ceramic material, which can obtain the electric withstand voltage of the light emitting element module 31 and the mounting plate 40 and has heat dissipation. You may change the number of the light emitting element modules 31 mounted in one light emitting element module unit 37 according to the light quantity requested | required of the tunnel lighting fixture 1. FIG. The light emitting element module unit 37 is fixed to the mounting plate 40 by a fixing member.

The reflector 32 distributes the light of the light emitting element module 31, and the reflector 32 provides a horizontally elongated light distribution extending in the left and right directions in the light source unit 30.
As described above, the light source unit 10 includes a plurality of light source units 30. The light source units 30 have the same light distribution as each other, and illuminate substantially the same irradiation area of the road surface 82. Has been increased.

Next, the heat dissipation structure of the tunnel lighting fixture 1 will be described with reference to FIGS. 1 and 4. 4 is a cross-sectional view showing a cross section taken along the line IV-IV in FIG.
A heat sink 21 is provided on the back surface (bottom surface) 2 </ b> B of the instrument case 2. The heat sink 21 is configured as an aluminum die cast or an aluminum casting excellent in thermal conductivity, and is provided in the back opening 8 provided in the back 2B of the instrument case 2. As shown in FIG. 4, the heat sink 21 includes a substantially plate-like base portion 21 </ b> A disposed in the instrument case 2, and an exposed portion 21 </ b> B exposed from the back surface of the base portion 21 </ b> A to the outside of the instrument case 2 through the back surface opening 8. It has. The base portion 21 </ b> A is formed larger than the back surface opening 8, is disposed in the device case 2 and is fixed to the back surface of the device case 2, and closes the back surface opening 8. The exposed portion 21B is provided with a vertically extending groove 21C, and a plurality of (seven in the present embodiment) radiation fins 21D are formed. A groove 21 </ b> E is formed in the base 21 </ b> A of the heat sink 21 over the entire circumference corresponding to the back opening 8. By disposing the packing 17 in the groove 21E, the packing 17 is inserted between the heat sink 21 and the rear opening 8, and water or the like can be prevented from entering the instrument case 2.

  A heat radiating plate 22 formed in a plate shape with a material such as aluminum having excellent thermal conductivity is fixed to the surface of the base 21A, and a plurality of mounting bases 23 for supporting the mounting plate 40 are fixed to the heat radiating plate 22. Has been. The mounting base 23 is made of a material such as aluminum having excellent thermal conductivity and is formed in a vertically long substantially prismatic shape, and is arranged vertically. For example, if the mounting base 23 is arranged on the left and right, the heat in the instrument case 2 is accumulated in the mounting base 23, and there is a risk that temperature unevenness occurs in the instrument case 2. However, such an arrangement is possible by arranging the mounting base 23 up and down. Temperature unevenness can be prevented. The mounting base 23 is disposed along the light emitting element module unit 37 so that the heat of the light emitting element module 31 can be effectively dissipated. The mounting base 23 is attached with a mounting plate 40 to which the light source unit 30 is fixed.

  The mounting base 23 includes a prismatic main body portion 23A, an extension portion 23B extending in the left-right direction I of the instrument case 2 on the side of the main body portion 23A in contact with the heat radiating plate 22, and mounting of the main body portion 23A. On the side that comes into contact with the plate 40, there is provided a spread portion 23 </ b> C that spreads in the left-right direction I. The extending portion 23B and the expanding portion 23C are provided in the vertical direction of the main body portion 23A, and the mounting base 23 has the extending portion 23B fixed to the heat radiating plate 22 by a plurality of screws (fixing means) 51. Thus, it is supported by the heat sink 22. The mounting base 23 increases the contact area with the heat sink 22 and with the mounting base 23 by the extending part 23B and the widening part 23C, which are wider than the main body part 23A, and improves the heat transfer performance. Yes. In addition, since the mounting base 23 is disposed immediately below the light emitting element module 31, the heat of the light emitting element module 31 can be quickly transferred to the heat radiating plate 22 and the heat sink 23.

The mounting plate 40 is made of a material such as aluminum having excellent thermal conductivity and is formed in a rectangular plate shape that is long in the left-right direction. The heat radiating plate 22, the mounting base 23, and the mounting plate 40 radiate heat together with the heat sink 21. It constitutes a member.
Further, by fixing the mounting plate 40 to the mounting base 23, the light source unit 30 is disposed in the vicinity of the front glass 3 (in the vicinity of the front opening 7), so that the light of the light source unit 30 is transmitted through the inner wall 2 </ b> C of the instrument case 2. Efficient removal with reduced shielding.

Next, the attachment / detachment structure of the attachment plate 40 will be described.
The mounting plate 40 is detachably fixed to the mounting base 23. Specifically, as shown in FIG. 1, a plurality of dart holes 41 and a lower portion of the mounting plate 40 are formed in the upper portion of the mounting plate 40 so as to correspond to a plurality of screws (fixing means) 52 fixed to the mounting base 23. A notch 42 is formed. Therefore, the mounting plate 40 can be borrowed and fixed by placing the mounting plate 40 on the mounting base 23 so that the screw 52 engages with the boring hole 41 and the notch 42 in the state where the screw 52 is secured. The mounting plate 40 is fixed to the mounting base 23 by tightening the screws 52. In addition, the daruma hole 41 and the notch part 42 comprise the borrowing stop means of this embodiment.

  As shown in FIGS. 1 and 4, the mounting plate 40 has such a size that both edges 40 </ b> A in the left-right direction I (longitudinal direction in the present embodiment) of the mounting plate 40 extend to the inner wall 2 </ b> C of the instrument case 2. Is formed. Guide portions 43 that guide the mounting plate 40 along the inner wall 2 </ b> C are integrally provided on both edges 40 </ b> A of the mounting plate 40. Specifically, the guide portion 43 is formed by bending a thermally conductive plate constituting the mounting plate 40 toward the back surface 2B of the instrument case 2. The guide portion 43 is formed over the edge 40A and extends in a planar shape along the surface of the inner wall 2C.

Here, the left-right direction I of the instrument case 2 is a longitudinal width direction, and the up-down direction K of the instrument case 2 is a short width direction. In this embodiment, since the instrument case 2 is formed in a box shape with rounded corners, the corners of the mounting plate 40 corresponding to the corners 2D in the front view of the instrument case 2 are formed obliquely and chamfered. A portion 40B is provided. When the instrument case 2 is formed in a box shape with no rounded corners, it is not necessary to provide the chamfered portion 40B, and the guide portion 43 may be provided across the short width direction of the mounting plate 40.
In addition, since the tip 43A of the guide portion 43 is not in contact with the heat sink 22 because it is formed in a box shape with rounded corners, the instrument case 2 is formed in a box shape with no rounded corners. May bring the tip 43 </ b> A of the guide portion 43 into contact with the heat radiating plate 22.

The guide portion 43 is provided so as to leave a slight gap δ between the guide portion 43 and the inner wall 2C. This gap δ is set to a gap that can prevent the attachment plate 40 from contacting the packing 9. From the viewpoint of heat transfer from the mounting plate 40 to the inner wall 2C, the gap δ is desirably small.
As shown in FIG. 1, through holes 44 are formed on both sides in the longitudinal direction of the mounting plate 40 so that the operator can hold the mounting plate 40 with his / her hand. By forming the grip portion of the mounting plate 40 as the through hole 44, the grip portion can be easily formed without increasing the number of parts.

Next, the operation of this embodiment will be described.
When attaching the attachment plate 40 to which the light source unit 30 is fixed, the operator first holds the screw 52 on the attachment base and inserts a hand into the through hole 44 to grip the attachment plate 40. Here, since the through-holes 44 are formed on both sides in the longitudinal direction of the mounting plate 40, the operator can hold the mounting plate 40 in a well-balanced state with both hands that can easily apply force.
Next, the operator inserts the mounting plate 40 into the front opening 7 of the instrument case 2. At this time, since the guide portion 43 of the mounting plate 40 is guided along the inner wall 2 </ b> C of the instrument case 2, the operator can easily insert the mounting plate 40 into the instrument case 2. Since the mounting plate 40 is formed in a size having a gap δ between the guide portion 43 and the inner wall 2C, the mounting plate 40 contacts the packing 9 when the mounting plate 40 is inserted into the instrument case 2. Can be prevented. If the mounting plate 40 contacts the packing 9, the packing 9 may be damaged or peeled off.

Then, the operator places the mounting plate 40 on the mounting base 23 so that the screw 52 engages with the saddle hole 41 and the cutout portion 42, so that the mounting plate 40 is borrowed and fixed to the mounting base 23. . Since the mounting plate 40 is borrowed and fixed, the operator can release his hand from the mounting plate 40 and can easily tighten the screw 52.
In a state where the mounting plate 40 is fixed to the mounting base 23, the guide portion 43 extends along the inner wall 2C of the instrument case 2, and the guide portion 43 and the inner wall 2C correspond in a relatively large area. The portion 43 functions as a heat radiating portion that transfers the heat of the mounting plate 40 to the inner wall 2C.

  When removing the mounting plate 40, the operator first loosens the screw 52 to such an extent that the mounting plate 40 can be borrowed and fixed, inserts a hand into the through hole 44, and grips the mounting plate 40. 40 is pulled out of the instrument case 2. At this time, since the guide portion 43 of the mounting plate 40 is guided along the inner wall 2 </ b> C of the instrument case 2, the operator can easily pull out the mounting plate 40 from the instrument case 2. Since the mounting plate 40 is formed in a size having a gap δ between the guide portion 43 and the inner wall 2C, the mounting plate 40 can be prevented from coming into contact with the packing 9 when the mounting plate 40 is removed. In addition, the guide portion 43 is formed by bending the mounting plate 40 toward the back surface 2B of the instrument case 2, and the corners of both edges 40A of the mounting plate 40 are rounded, so that the mounting plate 40 contacts the packing 9. However, it is possible to prevent the packing 9 from peeling off.

  As described above, according to the present embodiment, both edges 40A of the mounting plate 40 are extended to the inner wall 2C of the instrument case 2 in the width direction of the instrument case 2, and the mounting plate 40 is attached to the both edges 40A. The guide portion 43 that guides along is provided. With this configuration, since the guide portion 43 of the mounting plate 40 is guided along the inner wall 2C of the instrument case 2 when the mounting plate 40 is attached and detached, the mounting plate 40 can be easily attached and detached.

  Further, according to the present embodiment, the mounting plate 40 and the guide portion 43 are made of a material having thermal conductivity, extend along the surface of the inner wall 2C, and transmit the heat of the mounting plate 40 to the inner wall 2C. Configured as. With this configuration, heat of the light emitting element is radiated from the mounting plate 40 and radiated to the inner wall 2C via the guide portion 43, so that the light emitting element can be effectively cooled.

  Further, according to the present embodiment, the instrument case 2 has the front opening 7 for attaching and detaching the mounting plate 40, and is configured to be hermetically sealed by disposing a lid on the front opening 7 via the packing 9. The portion 43 is formed by bending the mounting plate 40 toward the back surface 2B. With this configuration, it is possible to prevent the packing 9 from being peeled when the mounting plate 40 is removed.

  Further, according to the present embodiment, since the guide portion 43 is provided with a gap δ between the inner wall 2C and the mounting plate 40, the mounting plate 40 can be prevented from contacting the packing 9 when the mounting plate 40 is attached or detached. .

  Further, according to the present embodiment, the mounting plate 40 extends in the longitudinal direction of the instrument case 2 and has gripping portions on both sides in the longitudinal direction, so that the operator can grip the mounting plate 40 in a natural posture. The mounting plate 40 can be easily attached and detached.

However, the above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the distal end 43A of the guide portion 43 also extends along the surface of the inner wall 2C, but the distal end 143A of the guide portion 143 is bent inward as in the example of the mounting plate 140 shown in FIG. It may be. Thereby, it can prevent more effectively that it contacts the packing 9 at the time of attachment or detachment of the attachment plate 140. In the example of FIG. 5, the tip 143 </ b> A of the guide portion 143 is brought into contact with the heat radiating plate 22.

  In the above-described embodiment, since the electronic parts such as the power terminal block 11 and the power box 12 are disposed below the mounting plate 40, the guide portions 43 are provided on the left and right edges 40A. However, the present invention is not limited to this. is not. For example, the guide part 43 may be provided on both the left and right edges 40A, and the upper edge 40C of the mounting plate 40 may be extended to the upper inner wall 2C, and the upper edge 40C may be provided with the guide part. Further, for example, when electronic components such as the power supply terminal block 11 and the power supply box 12 can be arranged on the mounting plate 40, the guide portion 43 is replaced with both the upper and lower edges by replacing the guide portion 43 with the left and right edges 40A. It may be provided at 40C, and may be provided at both the upper, lower, left and right edges 40A.

In the above-described embodiment, the guide portion 43 is formed integrally with the attachment plate 40 by bending the attachment plate 40. However, the guide portion 43 that is separate from the attachment plate 40 may be attached to the attachment plate 40.
Moreover, in the above-mentioned embodiment, although the guide part 43 extended toward the back surface 2B of the instrument case 2, you may extend to the front opening 7 of the instrument case 2. FIG.

In the above-described embodiment, the grip portion is configured as the through hole 44 provided in the mounting plate 40. However, the present invention is not limited to this. For example, the grip portion is configured as a grippable handle attached to the mounting plate 40. May be.
In the above-described embodiment, the heat sink 21 is provided, but the heat sink 21 may be omitted.

Moreover, although LED was illustrated as an example of a light emitting element in the above-mentioned embodiment, not only this but arbitrary elements can be used.
Further, for example, the tunnel lighting fixture is exemplified as an example of a road lighting fixture, but the present invention is not limited thereto, and various road lighting fixtures such as a lighting fixture that is installed on a sound insulation wall of an expressway and illuminates a road surface are used. It can be applied to.

1,100 Tunnel lighting (road lighting)
2 Instrument case 2B Back (bottom)
2C Inner wall 3 Front glass (lid)
7 Front opening (opening)
8 Back opening 9 Packing 21 Mounting base 30 Light emitting element module 40 Mounting plate 40A Both edges 43 Guide part (heat dissipation part)
43A Tip 44 Through-hole (gripping part)
I Left and right direction (width direction)
δ Clearance

Claims (6)

Place the mounting base on the bottom of the substantially rectangular instrument case,
A mounting plate with a light emitting element mounted in the surface is detachably provided on the mounting base,
Extending both edges of the mounting plate to the inner wall of the instrument case in the width direction of the instrument case;
A guide portion for guiding the mounting plate along the inner wall is provided on both edges ,
The instrument case is provided with an opening in the front for extracting light from the light emitting element,
The mounting base is formed in a substantially prismatic shape, and the light emitting element is disposed in the vicinity of the opening by supporting the mounting plate on a plurality of the mounting bases.
The lighting device for roads , wherein the guide portion extends from the mounting plate to the bottom surface side beyond a contact surface between the mounting plate and the mounting base .   The mounting plate and the guide portion are formed of a material having thermal conductivity, and extend along a surface of the inner wall, and are configured as a heat radiating portion that transmits heat of the mounting plate to the inner wall. Item 10. A lighting device for a road according to Item 1. The opening is an opening for attaching and detaching the mounting plate , and is configured to be hermetically sealed by placing a lid through a packing in the opening.
The road lighting device according to claim 1, wherein the guide portion is formed by bending the mounting plate toward the bottom surface.   The road lighting device according to claim 1, wherein the guide portion is provided with a gap between the guide portion and the inner wall.   The road lighting device according to claim 3 or 4, wherein a tip of the guide portion is bent inward.   The road luminaire according to any one of claims 1 to 5, wherein the mounting plate extends in a longitudinal direction of the fixture case, and has grip portions on both sides in the longitudinal direction.

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