JP2024085679A - LED road lighting - Google Patents

Abstract

To provide an LED road lighting system capable of reducing the possibility of lighting fixtures falling off when a vehicle collides with a pillar.
[Solution] The LED road lighting comprises a vertical support 1 extending in the vertical direction Z, a horizontal support 2 extending from the vertical support 1 to the road side X1, and an LED lighting unit 3 provided inside the horizontal support 2. The horizontal support 2 has a tip opening 20 and an irradiation opening 21 opening downward Z1. The LED lighting unit 3 is slidable inside the horizontal support 2 along the axial direction AD of the horizontal support 2, and is configured to be attachable and detachable from the outside of the horizontal support 2 via the tip opening 20 to an attachment position where light can be irradiated downward Z1 from the irradiation opening 21.
[Selected figure] Figure 4

Description

This disclosure relates to LED road lighting.

Road lighting poles are installed on the roadside or median strip of general roads and expressways. LED road lighting fixtures are attached to the tip of the road lighting pole's support via a connection part such as a screw or clamp member.

JP 2017-220312 A

It is desirable to prevent road lighting fixtures from falling even if a very strong impact force is applied, such as when a car hits the support pole of a road lighting pole.

This disclosure provides LED road lighting that can reduce the possibility of lighting fixtures falling when a vehicle hits a pole.

The LED road lighting disclosed herein comprises a vertical support extending in the vertical direction, a horizontal support extending from the vertical support toward the road, and an LED lighting unit provided inside the horizontal support, the horizontal support having a tip opening and an irradiation opening that opens downward, the LED lighting unit being slidable along the axial direction of the horizontal support inside the horizontal support and being detachable from the outside of the horizontal support via the tip opening to an attachment position where light can be irradiated downward from the irradiation opening.

FIG. 2 is a side view showing the vertical support 1 and the horizontal support 2 of the road lighting pole of the first embodiment provided on an installation surface 10. An enlarged side view showing the horizontal support 2 and the internal LED lighting unit 3. 4A and 4B are plan and bottom views showing the horizontal support 2. 4 is a side view showing how the LED lighting unit 3 is attached to the horizontal support 2. FIG. 4 is a side view showing the mounting structure of the LED lighting unit 3 on the horizontal support 2. FIG. 4 is a bottom view showing the mounting structure of the LED lighting unit 3 on the horizontal support 2. FIG. FIG. 4 is a plan view showing the mounting structure of the LED lighting unit 3. A front view of the LED lighting unit 3 attached to the horizontal support 2, as viewed from the tip side (road side X1) of the horizontal support 2. FIG. 11 is a side view showing the connecting portion between the horizontal support 2 and the vertical support 1 in the second embodiment. FIG. 11 is a rear view showing the connecting portion between the horizontal support 2 and the vertical support 1 in the second embodiment.

First Embodiment
The first embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a side view showing a vertical support 1 and a horizontal support 2 of a road lighting pole of the first embodiment provided on an installation surface 10. FIG. 2 is an enlarged side view showing the horizontal support 2 and the LED lighting unit 3 inside. FIG. 3 is a plan view and a bottom view showing the horizontal support 2, FIG. 3(a) is a plan view, and FIG. 3(b) is a bottom view. FIG. 4 is a side view showing a state in which the LED lighting unit 3 is attached to the horizontal support 2. In FIG. 4, the horizontal support 2 is shown by a two-dot chain line. FIG. 5 is a side view showing the mounting structure of the LED lighting unit 3 to the horizontal support 2. In FIG. 5, the horizontal support 2 is shown by a two-dot chain line. FIG. 6 is a bottom view showing the mounting structure of the LED lighting unit 3 to the horizontal support 2. In FIG. 6, the horizontal support 2 is shown by a two-dot chain line. FIG. 7 is a plan view showing the mounting structure of the LED lighting unit 3. In FIG. 7, the horizontal support 2 is omitted. Fig. 8 is a front view of the horizontal support 2 with the LED lighting unit 3 attached thereto, as viewed from the tip side (road side X1) of the horizontal support 2. In Fig. 8, the horizontal support 2 is indicated by a two-dot chain line, and the cover 50 is indicated by a one-dot chain line.

[Vertical support 1 and horizontal support 2]
As shown in FIG. 1, a vertical support 1 constituting an illumination column is provided on an installation surface 10 of a road surface or a wall surface, and the vertical support 1 extends in the vertical direction Z from the installation surface 10. A horizontal support 2 is provided at the upper end of the vertical support 1, extending from the vertical support 1 to the road side X1 in the horizontal direction X. The vertical support 1 is cylindrical, and the horizontal support 2 is formed in a rectangular parallelepiped (box-shaped). In the first embodiment, the vertical support 1 and the horizontal support 2 are made of metal material, and the vertical support 1 and the horizontal support 2 are integrally formed. As shown in FIG. 3(b), an irradiation opening 21 that opens downward Z1 is formed in the horizontal support 2. The irradiation opening 21 is formed in a rectangular shape with chamfered corners in a bottom view. As shown in FIG. 6, the irradiation opening 21 is smaller than the LED lighting unit 3, and the LED lighting unit 3 does not fall out of the irradiation opening 21. As shown in FIG. 8, a rectangular tip opening 20 is formed at the tip (the tip on the road side X1) of the horizontal support 2. The tip opening 20 is larger than the LED lighting unit 3, which allows the LED lighting unit 3 to be inserted through the tip opening 20 (see FIG. 4). As shown in FIG. 3(b), the road side X1 (tip side) of the horizontal support 2 faces upward, and a water drain hole 23 is formed on the side opposite the road (base end side) of the horizontal support 2. In other words, water may enter the inside of the horizontal support 2, and the horizontal support 2 does not have a sealed structure.

[LED lighting unit 3]
As shown in Figs. 2 and 5, the LED lighting unit 3, which is a lighting fixture, is provided inside the horizontal support 2 and is attached to a mounting position (shown in Figs. 5 and 6) inside the horizontal support 2 where light can be irradiated downward Z1 from the irradiation opening 21. As shown in Fig. 6, the LED lighting unit 3 has a plurality of LED elements 30, and irradiates light downward Z1 from the irradiation opening 21 as shown by the arrow S1 in Fig. 3. Also, as shown in Fig. 4, the LED lighting unit 3 is slidable along the axial direction AD of the horizontal support 2 inside the horizontal support 2, and is configured to be detachable from the outside of the horizontal support 2 through the tip opening 20 with respect to the mounting position shown in Figs. 5 and 6. That is, the LED lighting unit 3 can only be accessed from the outside of the horizontal support 2 to the inside by passing through the tip opening 20. Therefore, the LED lighting unit 3 does not go out of the horizontal support 2 unless it passes through the tip opening 20 of the horizontal support 2, and the possibility of the LED lighting unit 3 falling during a vehicle collision with the vertical support 1 can be suppressed.

As shown in Figures 4 to 8, the LED lighting unit 3 is formed in an elongated shape along the axial direction AD of the horizontal support 2. The LED lighting unit 3 has a rectangular parallelepiped lighting section 31 having an LED element 30, a cooling section 32 attached above the lighting section 31, and a pair of mounting pieces 33 provided on both longitudinal sides of the cooling section 32. The lighting section 31 has the LED element 30, a lens, and a substrate (not shown), and causes the LED element 30 to emit light when power is supplied from a power cable 60 (see Figure 4). The cooling section 32 is composed of a heat sink. The heat sink dissipates heat generated by the lighting section 31, and the heat sink and the mounting pieces 33 contact the horizontal support 2, transferring heat to the horizontal support 2 and providing an additional heat dissipation effect.

As shown in FIG. 5, the mounting piece 33 is formed by bending a metal plate, and has a first end 33a fixed to the cooling section 32 by a fastening means such as a screw, a parallel facing portion 33b bent from the first end 33a outward in the axial direction AD of the horizontal support 2 and facing the inner surface of the horizontal support 2 in parallel, and a second end 33c bent from the parallel facing portion 33b downward Z1. As shown in FIG. 4 and FIG. 5, a first nut 40 is fixed to the parallel facing portion 33b by welding or the like. As shown in FIG. 3(a), a first insertion hole 41 is formed on the upper surface of the horizontal support 2 at a position corresponding to the first nut 40. As shown in FIG. 5, the parallel facing portion 33b is fixed to the horizontal support 2 by a first bolt 42 and a first nut 40 inserted through the first insertion hole 41. The first bolt 42 and the first nut 40 constitute a first fixing means. The first fixing means are arranged on both outer sides of the horizontal support 2 of the LED lighting unit 3 in the axial direction AD.

In conventional structures in which an LED lighting fixture is fixed to the outside of a horizontal support 2, the first fixing means for fixing the LED lighting fixture is often arranged only on one of the axially outer sides of the horizontal support 2. In contrast, in the first embodiment, the first fixing means are arranged on both outer sides of the LED lighting unit 3 in the axial direction AD of the horizontal support 2, making the LED lighting unit 3 more securely fixed, and reducing the possibility of the LED lighting unit 3 falling off even when an impact force is applied during a vehicle collision.

In order to prevent the LED lighting unit 3 from slipping out of the tip opening 20, a penetrating member 43 is provided as a means other than the first fixing means. The penetrating member 43 penetrates the parts (upper and lower surfaces) of the wall surface constituting the horizontal support 2 that face each other. The penetrating member 43 is a headed bolt having a head and a bolt part, and the head is arranged on the outside of the horizontal support 2, the bolt part is in a penetrating state through the second insertion hole 44 (see FIG. 3) formed in the horizontal support 2, and the tip of the bolt part of the penetrating member 43 is fastened to the second nut 45. The penetrating member 43 hangs on a part of the tip opening 20, making the space through which the LED lighting unit 3 can pass smaller than the LED lighting unit 3. Therefore, the penetrating member 43 can restrict the LED lighting unit 3 from slipping out of the tip opening 20 by interfering with the LED lighting unit 3. The penetrating member 43 penetrates the part of the wall surface constituting the horizontal support 2 that is located on the tip opening 20 side of the LED lighting unit 3 at the mounting position. As a result, when the LED lighting unit 3 moves in a direction in which it tries to come out of the tip opening 20, the LED lighting unit 3 interferes with the penetrating member 43, making it possible to accurately prevent the LED lighting unit 3 from coming out. In addition, since the penetrating member 43 is in a state of penetrating two opposing wall surfaces of the horizontal support 2, the LED lighting unit 3 cannot come out of the tip opening 20 unless the penetrating member 43 comes out of the two wall surfaces, so it is possible to prevent the LED lighting unit 3 from coming out.

A lid 50 is provided to close the tip opening 20. The lid 50 is fixed to the LED lighting unit 3 by a lid fixing device 51. The lid fixing device 51 is a nut and a bolt, and the nut is fixed to the mounting piece 33 of the LED lighting unit 3 by welding or the like, and the bolt and the nut are fastened in a state in which the lid 50 is sandwiched between the bolt and the nut. The lid 50 is connected to the LED lighting unit 3 by a lid wire 61. This makes it possible to prevent the lid 50 from falling even if the lid fixing device 51 stops functioning. The lid wire 61 is connected to the LED lighting unit 3 and the lid 50 via a connector such as a carabiner.

A unit wire 62 is provided that connects the LED lighting unit 3 and the horizontal support 2. The unit wire 62 is connected to the LED lighting unit 3 via a connector such as a carabiner. The unit wire 62 is connected to an internal support 22 provided inside the horizontal support 2 via a connector such as a carabiner. This makes it possible to prevent the LED lighting unit 3 from coming loose from the horizontal support 2.

[Method of Assembling the LED Lighting Unit 3]
A method of assembling the LED lighting unit 3 will be described with reference to FIG. 4. As shown in FIG. 4, before inserting the LED lighting unit 3 into the horizontal support 2, the unit wire 62 is connected to the internal support 22, and the free end of the unit wire 62 is extended from the irradiation opening 21. Next, the power cable 60 of the LED lighting unit 3 is made to pass through the inside of the vertical support 1. Also, the cover wire 61 is connected to the LED lighting unit 3. Next, the LED lighting unit 3 is inserted into the inside of the horizontal support 2 while sliding along the axial direction AD from the tip opening 20 of the horizontal support 2. Next, the free end of the unit wire 62 is connected to the LED lighting unit 3 by accessing it from the irradiation opening 21. Next, the LED lighting unit 3 is inserted into the inside of the horizontal support 2 until the LED lighting unit 3 reaches the mounting position. Next, the first bolt 42 is inserted into the first insertion hole 41, and the LED lighting unit 3 is fixed to the upper surface of the horizontal support 2 by the first bolt 42. Next, the penetrating member 43 is inserted into the second insertion hole 44 to be in a penetrating state, and the penetrating member 43 is fastened with a second nut 45. Next, after confirming that the penetrating member 43 is properly attached via the tip opening 20, the free end of the lid wire 61 is connected to the lid 50. Next, the tip opening 20 of the horizontal support 2 is closed with the lid 50, and the lid 50 is fastened and fixed with the lid fastener 51.

Second Embodiment
A second embodiment of the present disclosure will be described with reference to the drawings. In the first embodiment, the horizontal support 2 and the vertical support 1 are integrally configured so as not to be separated, and this structure is suitable for a newly installed lighting support. In the second embodiment, a part of the vertical support 1 is configured so as to be separable, and this structure is suitable for an existing lighting support. Fig. 9 is a side view showing the connection part of the horizontal support 2 and the vertical support 1 in the second embodiment. Fig. 10 is a back view showing the connection part of the horizontal support 2 and the vertical support 1 in the second embodiment.

As shown in Figures 9 and 10, the vertical support 1 has a first vertical support 1A to which the horizontal support 2 is integrally formed by welding or the like, and a second vertical support 1B to which the first vertical support 1A is attached at its tip. The first vertical support 1A and the second vertical support 1B are configured to be separable. In the second embodiment, the tip of the second vertical support 1B is inserted inside the first vertical support 1A, but the tip of the first vertical support 1A may also be inserted inside the second vertical support 1B.

A plurality of fixing bolts (71, 72) are provided as a fixing structure between the first vertical column 1A and the second vertical column 1B. The plurality of fixing bolts (71, 72) include a first fixing bolt 71 that passes through the first vertical column 1A and the second vertical column 1B, and a second fixing bolt 72 that is fixed to the first vertical column 1A and presses the second vertical column 1B. The second fixing bolts 72 are provided in a total of eight locations: multiple locations (four locations) on the upper four sides and multiple locations (four locations) on the lower four sides.

Furthermore, as a fixing structure between the first vertical column 1A and the second vertical column 1B, vertical members 73 are provided that extend in the vertical direction Z and are arranged at multiple locations around the vertical column 1. In the second embodiment, the vertical members 73 are plate members and are arranged at two locations that sandwich the vertical column 1, but the number can be changed as appropriate as long as it is two or more. The upper end of the vertical member 73 is fastened to the flange 11 that protrudes radially from the first vertical column 1A with fasteners of bolts and nuts. The lower end of the vertical member 73 is fastened to a pair of band members 74 that sandwich and fix the second vertical column 1B with fasteners of bolts and nuts. The band member 74 has an arc portion for sandwiching the second vertical column 1B, two pairs of upper and lower ribs that extend radially outward from the arc portion to reinforce the arc portion, and a flange for fastening the vertical member 73 and the mating band member 74.

In this way, the upper end of each vertical member 73 is fixed to the first vertical column 1A, and the lower end of each vertical member 73 is fixed to the second vertical column 1B, so that the first vertical column 1A is prevented from coming off the second vertical column 1B in the axial direction (vertical direction Z). Furthermore, the rotational movement of the first vertical column 1A relative to the second vertical column 1B is also prevented, so that the first vertical column 1A and the second vertical column 1B can be fixed firmly. Furthermore, since the vertical member 73 bears part of the shear force, the vertical member 73 can prevent the shear force from concentrating on the first fixing bolt 71, and the first fixing bolt 71 can be prevented from being sheared, and the first fixing bolt 71 can be prevented from coming off.

<Modification>
(A) In the first embodiment, the vertical support 1 is cylindrical and the horizontal support 2 is formed in a rectangular parallelepiped (box shape), but this is not limited to this and the shapes can be changed in various ways.

(B) In the first embodiment, the penetrating member 43 penetrates a portion of the wall surface constituting the horizontal support 2 that is closer to the tip opening 20 than the LED lighting unit 3 in the mounting position, but the penetrating position is not limited to this. For example, the penetrating member 43 may penetrate a portion that is closer to the tip opening 20 than the LED lighting unit 3 in the mounting position (the base end side of the horizontal support 2).

(C) In the first embodiment, the lid body 50 is fixed to the LED lighting unit 3 by the lid body fixing device 51, but this is not limited thereto. For example, the lid body 50 may be fixed to the horizontal support 2.

(D) In the first embodiment, the lid body wire 61 connects the lid body 50 to the LED lighting unit 3, but is not limited to this. For example, the lid body wire 61 may connect the lid body 50 to the horizontal support 2.

(E) In the second embodiment, the vertical member 73 is fixed to a flange 11 formed on the first vertical support 1A, but is not limited to this. For example, the vertical member 73 may be fixed to a band member 74 fixed to sandwich the first vertical support 1A. Also, the vertical member 73 is fixed to a band member 74 fixed to sandwich the second vertical support 1B, but is not limited to this. For example, the vertical member 73 may be fixed to a flange formed on the second vertical support 1B. In other words, the fixing structure of the vertical member 73 to the first vertical support 1A and the second vertical support 1B may be a flange or a band member, and can be selected arbitrarily.

(F) In the first and second embodiments, the horizontal support 2 extends from the vertical support 1 to one side in the horizontal direction X, but is not limited to this. For example, when the vertical support 1 is placed in the median strip of a road, two horizontal supports 2 may extend from the vertical support 1 to both sides in the horizontal direction X.

[1]
As described above, the LED road lighting of the first and second embodiments includes a vertical support 1 extending in the vertical direction Z, a horizontal support 2 extending from the vertical support 1 to the road side X1, and an LED lighting unit 3 provided inside the horizontal support 2, the horizontal support 2 having a tip opening 20 and an irradiation opening 21 opening downward Z1, and the LED lighting unit 3 is slidable along the axial direction AD of the horizontal support 2 inside the horizontal support 2 and is configured to be detachable from the outside of the horizontal support 2 via the tip opening 20 to an attachment position where light can be irradiated downward Z1 from the irradiation opening 21.

With this configuration, the LED lighting unit 3 is installed inside the horizontal support 2 that extends from the vertical support 1 to the road side X1, which makes it possible to reduce the possibility of the lighting fixture falling off in the event of a vehicle collision with the vertical support 1, compared to a conventional configuration in which the lighting fixture is attached to the outside of the horizontal support 2.

[2]
The LED road lighting described in [1] above may be provided with a penetrating member 43 that penetrates mutually facing portions of the wall surfaces constituting the horizontal support 2, and the penetrating member 43 may interfere with the LED lighting unit 3, thereby preventing the LED lighting unit 3 from being removed from the tip opening 20.
According to this configuration, the penetrating members 43 penetrate the portions of the wall surfaces constituting the horizontal support 2 that face each other, so that it is possible to reliably prevent the LED lighting unit 3 from becoming detached.

[3]
In the LED road lighting described in [2] above, the penetrating member 43 may penetrate a portion of the wall surface constituting the horizontal support 2 that is located closer to the tip opening 20 than the LED lighting unit 3 in the mounting position.
According to this configuration, by arranging the penetrating member 43 closer to the tip opening 20 side of the horizontal support 2 than the LED lighting unit 3, the LED lighting unit 3 reliably interferes with the penetrating member 43 when it is removed from the tip opening 20, making it possible to reliably prevent the LED lighting unit 3 from being removed.

[4]
The LED road lighting described in any of [1] to [3] above may have a lid body 50 that closes the tip opening 20, a lid body fastener 51 that fixes the lid body 50, and a lid body wire 61 that is a connector other than the lid body fastener 51 and connects the lid body 50 to the LED lighting unit 3 or the horizontal support 2.
According to this configuration, even if the lid fixing device 51 becomes inoperable due to damage or the like, the lid wire 61 can prevent the lid 50 from falling. Furthermore, in the LED road lighting described in [3] above, it is possible to fix the lid 50 after confirming that the penetrating member 43 properly penetrates the wall surface constituting the horizontal support 2.

[5]
In the LED road lighting according to any one of the above [1] to [4], a unit wire 62 may be provided that connects the LED lighting unit 3 and the horizontal support 2.
According to this configuration, it is possible to further prevent the LED illumination unit 3 from falling off.

[6]
The LED road lighting described in any one of [1] to "5" above may include vertical members 73 extending in the vertical direction Z and arranged at multiple locations around the vertical support 1, the vertical support 1 having a first vertical support 1A with which the horizontal support 2 is integrally formed, and a second vertical support 1B to which the first vertical support 1A is attached at its tip, and the upper end of each of the vertical members 73 is fixed to the first vertical support 1A, and the lower end of each of the vertical members 73 is fixed to the second vertical support 1B.
According to this configuration, the vertical member 73 prevents the first vertical column 1A from coming off the second vertical column 1B in the axial direction (vertical direction Z), and also prevents the first vertical column 1A from rotating relative to the second vertical column 1B, making it possible to properly fix the first vertical column 1A to the second vertical column 1B. Furthermore, since the vertical member 73 bears part of the shear force, the vertical member 73 can prevent the shear force from concentrating on the first fixing bolt 71, making it possible to prevent the first fixing bolt 71 from being sheared and to prevent the first fixing bolt 71 from coming off.

This disclosure is in no way limited to the above-described embodiments, and various improvements and modifications are possible without departing from the spirit and scope of this disclosure.

1: Vertical support 1A: First vertical support 1B: Second vertical support 2: Horizontal support 3: LED lighting unit 20: Tip opening 21: Irradiation opening 43: Penetrating member 50: Lid 51: Lid fixing device 61: Lid wire 62: Unit wire 73: Vertical member AD: Axial direction X1: Road side Z: Vertical direction

Claims (6)

A vertical support extending in a vertical direction;
A horizontal support extending from the vertical support to the road side;
An LED lighting unit provided inside the horizontal support,
The horizontal support has a tip opening and an irradiation opening that opens downward,
The LED lighting unit is configured to be slidable along the axial direction of the horizontal support inside the horizontal support, and to be detachable from the outside of the horizontal support through the tip opening to an attachment position where light can be emitted downward from the irradiation opening. A penetrating member is provided to penetrate portions of the wall surfaces that constitute the horizontal support that face each other,
The LED road lighting according to claim 1 , wherein the penetrating member is capable of restricting removal of the LED lighting unit from the tip opening by interfering with the LED lighting unit. The LED road lighting according to claim 2, wherein the penetrating member penetrates a portion of the wall surface constituting the horizontal support that is located closer to the tip opening than the LED lighting unit at the mounting position. A cover that closes the tip opening;
A lid fixing tool for fixing the lid;
4. The LED road lighting according to claim 3, further comprising: a lid wire that is a connector other than the lid fixing device and connects the lid to the LED lighting unit or the horizontal support. The LED road lighting according to claim 1, further comprising a unit wire connecting the LED lighting unit and the horizontal support. A vertical member extending in the vertical direction and arranged at a plurality of locations in a circumferential direction of the vertical support is provided,
The vertical support includes a first vertical support integrally formed with the horizontal support, and a second vertical support to which the first vertical support is attached at its tip,
6. The LED road lighting according to claim 1, wherein an upper end of each of said vertical members is fixed to said first vertical support, and a lower end of each of said vertical members is fixed to said second vertical support.