JP7508987B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture.

A known configuration of lighting fixtures includes a light source unit that emits light through a translucent globe, a power supply circuit that supplies power to the light source unit, a terminal block that functions as a connection member to which an external power supply line is connected, a pole mounting part that can be attached to a pole, and a lower body that functions as a frame to house these. In this type of lighting fixture, the terminal block is provided near the pole mounting part, and the terminal block and pole mounting part are covered with a relatively small cover, and the parts not covered by the cover are covered with a lid (see, for example, Patent Document 1).

JP 2014-132593 A

However, in a configuration in which a terminal block is provided near the pillar mounting portion and the terminal block and the pillar mounting portion are covered with a relatively small cover, if rainwater or dust enters around the small cover, there is a risk that the rainwater and other particles will accumulate near the terminal block.
For this reason, it may become necessary to provide a structure to prevent rainwater from adhering to the terminal block. Furthermore, if the terminal block is located near the support pole mounting part, restrictions arise in terms of securing space for arranging the terminal block near the support pole mounting part, and the bending radius of the power supply line may become small.

The present invention was made in consideration of the above-mentioned circumstances, and aims to prevent rainwater and other substances from adhering to the terminal block with a simple configuration, and to make it easier to eliminate restrictions on the arrangement of the terminal block and the work of connecting the power supply line.

One aspect of the present invention is a lighting fixture comprising a light source unit in which light-emitting elements are arranged and which emits light through a translucent globe, a power supply circuit which supplies power to the light source unit, a terminal block to which an external power supply line is connected, and a fixing portion which can be attached to a support, the lighting fixture is provided with a cover which extends over the entire top surface of the lighting fixture, and the top surface of the light source unit has relatively high ridges on both sides in the width direction, with valleys formed between the ridges, and the terminal block is located in the valleys at the top of the light source unit , in an area covered by the cover, and at approximately the center of the light source unit in the fore-to-aft direction .

In one aspect of the present invention, in the lighting device described above, the cover may be freely opened and closed based on a fulcrum located on the opposite side of the fixing part with respect to the cover.

In one aspect of the present invention, the lighting device may have a connecting member connected to the cover at a position closer to the fulcrum than the center position between one end of the cover on the fulcrum side and the other end of the cover away from the fulcrum, and a cover open/close mechanism may be configured that guides the movement of the connecting member so that the cover can be opened and closed freely, and that regulates the movement and range of movement of the connecting member to hold the cover in an open state.

In one aspect of the present invention, in the lighting device described above, the cover open holding mechanism may have a rail portion provided on the light source portion to guide the movement of the connecting member, and a movement restricting portion that restricts the movement of the connecting member in a predetermined direction when the cover is in the open state.

In one aspect of the present invention, in the above-mentioned lighting device, the light source unit may be provided with a gap between the light source unit and the rail unit, and a fall prevention member that prevents the connecting member from falling off in the upward direction may be attached.

In one aspect of the present invention, in the above-mentioned lighting device, a heat equalizing protrusion may be provided on the upper surface of the light source unit to guide heat from a high temperature portion of the light source unit to a low temperature portion of the light source unit.

In one aspect of the present invention, in the lighting device, a heat shield may be provided on the surface of the cover facing the light source unit.

The present invention provides a simple configuration that can prevent rainwater and other contaminants from adhering to the terminal block, making it easier to eliminate restrictions on the placement of the terminal block and the work of connecting power lines.

1 is a diagram showing a lighting fixture according to an embodiment of the present invention as viewed obliquely from below. FIG. 2 is a view of the lighting fixture seen from diagonally above. FIG. FIG. FIG. 2 is a view of the lighting fixture with the cover open, seen from diagonally above. FIG. 2 is an exploded perspective view showing the light source unit together with the peripheral configuration. 1 is a diagram showing a lighting unit and a housing of a lighting fixture as viewed obliquely from above. 1 is a diagram showing the lighting unit and the housing of the lighting fixture as viewed obliquely from below. 4 is a side cross-sectional view showing the cover open holding mechanism together with the surrounding configuration. FIG. FIG. 2 is a diagram for explaining a packing and its surrounding structure. 4 is a side cross-sectional view showing the fall prevention wire fixing portion together with the surrounding configuration. FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a diagram of a lighting fixture 1 according to an embodiment of the present invention as viewed obliquely from below. Fig. 2 is a diagram of the lighting fixture 1 as viewed obliquely from above.
The lighting fixture 1 is used as a road lighting fixture, and is also called an LED road light. Fig. 1 shows the lighting fixture 1 supported on a pole-type support 2 installed on the side of the road, in a median strip, etc. The lighting fixture 1 may be used for purposes other than road lighting, and may be supported on a support 2 installed in outdoor locations such as parking lots, parks, and roadsides, and used for parking lot lighting, park lighting, street lighting, landscape lighting, and other purposes.

The lighting fixture 1 has a housing 10 having a hollow box shape, and a pole mounting part 11 at a predetermined location of the housing 10. The pole mounting part 11 is a clamp that can clamp the pole 2, and functions as a fixing part that can be attached to the pole 2. This pole mounting part 11 can be a wide variety of known members and structures that can be attached to a lighting fixture support member such as the pole 2. The underside of the housing 10 has an opening 13 that exposes the light-transmitting globe 12 to the irradiated surface. The light-transmitting globe 12 is made of a material such as glass or polycarbonate that has corrosion resistance and strength, and is light-transmitting.

1 and 2, the housing 10 includes a frame 21 that forms the lower part of the housing 10 and has an opening 13, and a cover 22 that forms the upper part of the housing 10. The cover 22 is formed as a large cover that covers the entire upper part of the frame 21, that is, the cover 22 is formed as a large cover that covers the entire upper part of the lighting device 1.
The frame 21 and cover 22 that constitute the housing 10 may be cast products made of aluminum or an aluminum alloy, or may be formed from a material other than metal, such as reinforced plastic with improved corrosion resistance and strength.

FIG. 3 is a side view of the lighting fixture 1, and FIG.
As shown in Figures 3 and 4, the housing 10 of the lighting fixture 1 is formed in a thin, generally rectangular box shape. The direction indicated by the symbol F in Figures 3 and 4 corresponds to the forward direction of the lighting fixture 1, which is, for example, a direction along the width direction of the road when the lighting fixture 1 is installed on the road. The direction indicated by the symbol U in Figure 3 corresponds to the upward direction of the lighting fixture 1. The direction indicated by the symbol LH in Figure 4 corresponds to the leftward direction of the lighting fixture 1, which is, for example, a direction along the traveling direction of the road when the lighting fixture 1 is installed on the road.

The directions of the lighting fixture 1 are explained assuming that they correspond to the directions of the components that make up the lighting fixture 1 (such as the housing 10 and the light source unit 31 described below). Note that the housing 10 of the lighting fixture 1 may be placed at an angle, such as in the vertical direction, but the directions in this explanation are those when it is placed horizontally.

As shown in Figures 3 and 4, the housing 10 has the longest length L in the front-to-rear direction of the lighting fixture 1, and the height H, which is the length in the up-down direction, is shorter than the width W, which is the length in the left-to-right direction of the lighting fixture 1. In other words, the lighting fixture 1 has a thin shape both vertically, and the front-to-back direction of the lighting fixture 1 is the longitudinal direction of the lighting fixture 1. The housing 10 has a support post attachment part 11 at the base end part 10K, which is one end side in the longitudinal direction, and a fulcrum S (see Figure 3) at the tip end part 10S, which is the opposite side (the other end side in the longitudinal direction) of the support post attachment part 11, which connects the frame body 21 and the cover 22 so that they can be rotated vertically.

As shown in FIG. 3, the cover 22 opens and closes with the fulcrum S being the position farthest from the base end 10K, so that opening the cover 22 can greatly open the base end 10K side of the housing 10. This makes it easier to access the pole mounting portion 11 and its surroundings, making it easier for workers to access and observe inside the lighting fixture 1, for example. Note that the symbol LC in FIG. 3 indicates the center position of the length L of the lighting fixture 1 in the front-to-rear direction.

FIG. 5 is a view of the lighting fixture 1 with the cover 22 open, as viewed obliquely from above.
The frame 21 integrally has a flat bottom plate portion 21L and a side wall 21W rising along the outer periphery of the bottom plate portion 21L, and a pillar mounting portion 11 is attached to the base end portion 10K side of the bottom plate portion 21L.
In the area within the frame body 21 closer to the tip portion 10S than the pillar mounting portion 11, there are arranged a light source portion 31 that emits light, a terminal block 41 to which a power supply line is connected, a power supply circuit 51 that supplies power to the light source portion 31, a cover open holding mechanism 61, and a fall prevention wire fixing portion 71.

A heat shield 22S is provided on the rear surface of the cover 22 (the surface facing the light source unit 31) as appropriate. If the lighting fixture 1 has a relatively high output, the temperature distribution across the entire surface of the cover 22 may be inappropriate, and icicles may form around the lighting fixture 1. In this configuration, the heat shield 22S is provided to adjust the temperature distribution of the cover 22 so that icicles do not form. If the lighting fixture 1 is a low-power type that generates a low amount of heat, icicles will not form even without the heat shield 22S, so the heat shield 22S may be omitted.

The light source unit 31 has a housing 32 that is substantially rectangular box-shaped. The length L1 in the front-rear direction F of the housing 32 is formed to extend from the tip 10S of the frame body 21 to the vicinity of the pillar mounting part 11. In the example of Fig. 5, the length L1 of the housing 32 of the light source unit 31 is at least two-thirds of the length L of the lighting fixture 1 in the front-rear direction. In addition, the width W1 (length in the left-right direction) of the housing 32 of the light source unit 31 is set to a length that extends from one of the left and right side walls 21W of the frame body 21 to the other left and right side wall 21W.
That is, the housing 32 of the light source unit 31 is formed into a large housing 32 that almost fills the area inside the frame 21 on the tip side beyond the pillar mounting portion 11 .

5, on the upper surface 32A of the housing 32 of the light source unit 31, relatively high peaks 32Y are formed on both sides in the width direction of the housing 32, and between these peaks 32Y, a valley 32T is formed that is recessed downward. This valley 32T extends across the light source unit 31 in the front-rear direction with a constant width. On the upper surface of the valley 32T, a plurality of protrusions 32L are formed that extend across almost the entire longitudinal direction of the valley 32T. These protrusions 32L are formed of a material having thermal conductivity, are formed with intervals in the left-right direction of the valley 32T, and extend across the front-rear direction of the valley 32T. These protrusions 32L can smoothly move heat from high-temperature areas to low-temperature areas in the valley 32T, contributing to the uniform heating of the light source unit 31 and the cooling of the high-temperature areas. In other words, the protrusions 32L function as heat-uniformizing protrusions that uniform the heat of the light source unit 31. The valley portion 32T may be formed to be the same as the housing 32 of the light source unit 31, or may be formed as a separate member from the housing 32.

A cover open holding mechanism 61 is provided on the fulcrum S side of the cover 22 in the valley portion 32T. The multiple protrusions 32L extend through both the left and right sides of the cover open holding mechanism 61 in the valley portion 32T to the support column mounting portion 11 side, contributing to uniform heating of the entire valley portion 32T. These protrusions 32L are also ribs that extend continuously across the upper surface of the valley portion 32T in the front-to-rear direction, so they also function as reinforcing members that reinforce the housing 32, that is, the light source portion 31. The number and shape of the protrusions 32L may be changed as appropriate.

The terminal block 41 is a wiring connection component for electrically connecting the external power supply line pulled in from the support 2 side to the wiring inside the fixture, and has multiple connection ports to which each wiring is connected independently.
The terminal block 41 has a plurality of connection ports to which wires such as relatively large-diameter power supply lines are independently connected, and is therefore a relatively large component among various known components for connecting wires.

In this configuration, as shown in FIG. 5, the terminal block 41 is disposed on the upper surface 32A of the light source unit 31, more specifically, on the upper surface of the valley portion 32T of the upper surface 32A of the light source unit 31. Therefore, the terminal block 41 can be disposed by utilizing the light source unit 31, and there is no need to secure a space for disposing the terminal block 41 separately from the light source unit 31. Also, compared to the conventional configuration in which the terminal block is disposed near the support pole mounting portion 11, there is no need to secure a space for disposing the terminal block 41 near the support pole mounting portion 11. Also, when the cover 22 is opened as shown in FIG. 5, the entire terminal block 41 is exposed, making it easy to access the terminal block 41 and to see the terminal block 41.

As shown in Figs. 1-5, the cover 22 has a covering portion 22A that covers the top of the bottom plate portion 21L of the frame body 21, and a downward extending wall 22B that extends downward from the entire outer periphery of the covering portion 22A. The covering portion 22A is formed in a shape that covers the entire top surface of the frame body 21 when the cover 22 is closed, and the downward extending wall 22B is formed in a shape that covers the entire side of the frame body 21 from the outside when the cover 22 is closed. This allows the cover 22 to cover the entire top and sides of the frame body 21, effectively preventing the intrusion of rainwater and dust from the surroundings. This prevents rainwater and dust from accumulating around the terminal block 41, and suppresses the adhesion of rainwater and the like to the terminal block 41.

As shown in Figures 2 and 3, the cover portion 22A has an upward bulge portion 22C that bulges upward from the center position LC of the cover portion 22A in the front-rear and left-right directions to above the support post mounting portion 11. This upward bulge portion 22C ensures sufficient clearance between the cover 22 and the support post mounting portion 11 and the valley portion 32T of the light source portion 31. In other words, the upward bulge portion 22C can expand the free space between the cover 22 and the area from the support post mounting portion 11 to at least the terminal block 41, making it easier to ensure space for wiring such as power lines.

The large cover 22 prevents rainwater and other water from entering the interior, and the light source unit 31 inside is waterproofed to a certain extent as described below, so the cover 22 can be fixed with a simple structure. In this lighting fixture 1, the cover 22 is fixed in the closed state by two fastening members 81 (one of which is not shown) provided at symmetrical positions. This reduces the number of fastening members 81 exposed above the lighting fixture 1, and reduces the fastening work required when installing and wiring the lighting fixture 1 on-site, making the work easier.

In general, in certain lighting fields such as road lighting, it is required that the wiring inside the fixture and the power supply line be connected using a terminal block 41 or a waterproof connector. The lighting fixture 1 of this configuration uses a terminal block 41, so it can meet the requirements of the lighting field, can take measures against rainwater, and allows easy access to the terminal block 41 from the outside. From the perspective of meeting the requirements of lighting fields such as road lighting, it is preferable that the terminal block 41 is made of ceramic, and that the creepage distance is 6 mm or more and the clearance distance is 4 mm or more.

The cover 22 in this configuration constitutes an exterior part (also called an outer shell part) of the lighting fixture 1, and is a part that does not affect the optical characteristics of the lighting fixture 1. Therefore, even if the cover 22 is replaced with a bird-proof cover or the like depending on the situation of the installation location, there is no change in the optical characteristics, etc., and the performance as a road lighting can be maintained.
Furthermore, when the amount of heat generated by the light source unit 31 is large, a heat shielding plate may be provided on the surface of the cover 22 facing the light source unit 31. Even when a heat shielding plate is provided, it is not necessary to change the optical characteristics of the cover 22, and therefore the performance required for road lighting can be maintained.

In conventional lighting fixtures, the terminal block 41 is provided near the pole mounting part 11 and is covered with a relatively small cover, so if rainwater or dust gets in around the cover, there is a risk that the rainwater and other particles will accumulate near the terminal block 41. Furthermore, in the conventional configuration, the pole mounting part 11 and the terminal block 41 are close to each other, so there is a risk that the power supply line from the pole 2 side will be bent at a steep angle and connected to the terminal block 41. When bending the power supply line, it is desirable to increase the bending radius (also called the inner radius) of the power supply line so as not to damage the coating of the power supply line.

In the lighting fixture 1 of this configuration, the terminal block 41 is disposed on the upper surface 32A of the light source unit 31, so the distance between the terminal block 41 and the pole mounting unit 11 can be made longer than in the past. This allows the bending radius of the power supply line to be increased, reducing the impact on the power supply line's coating, and also making it easier to connect the power supply line to the terminal block 41.

5, the terminal block 41 is provided at approximately the center in the front-rear direction of the light source unit 31. This allows the bending radius of the power supply line connected to the terminal block 41 to be sufficiently large, making it easy to handle even a single-core cable that requires a large bending radius or a large-diameter cable, and also facilitating the connection work to the terminal block 41.
Moreover, since the terminal block 41 is provided in the downwardly recessed valley portion 32T, contact between the terminal block 41 and the cover 22 can be easily prevented even when the cover 22 is closed, and the power supply line can be easily routed.

Although the central position of the light source unit 31 may generate the most heat while the light source unit 31 is turned on, this is sufficiently lower than the allowable temperature of the ceramic terminal block 41 and the power supply line, and therefore no actual damage occurs. Furthermore, in this configuration, the terminal block 41 is attached to a relatively small protrusion that protrudes from the top surface (upper surface 32A) of the light source unit 31 above the protrusion 32L, so that the terminal block 41 and the top surface of the light source unit 31 are not in direct contact with each other, and the terminal block 41 does not impede the dissipation of heat from the light source unit 31.
In addition, the protrusion 32L can reduce the temperature at the center of the light source unit 31, and is also expected to have the effect of transferring heat from the light source unit 31 to the outside of the light source unit 31 via the power supply line. These are advantageous for achieving uniform heating of the light source unit 31 and suppressing a rise in temperature.

FIG. 6 is an exploded perspective view showing the light source unit 31 together with the surrounding configuration.
The light source unit 31 includes a bowl-shaped housing 32 that opens downward, and a power supply board 51A that constitutes a power supply circuit 51, a light source board 34 on which LEDs are arranged, and a lens 35 are arranged inside the housing 32. A light-transmitting globe 12 is fixed to the lens 35 side of the housing 32. More specifically, the power supply board 51A is fixed to the housing 32 using a plurality of fastening members 81A inside the housing 32, and the light source board 34 and the lens 35 are fixed to the housing 32 using a plurality of fastening members 81B or the like so as to cover the opening of the housing 32 that includes the power supply board 51A.

Next, the light-transmitting globe 12 is temporarily fixed to the housing 32 using a plurality of (two in this configuration) temporary fastening members 81K so as to cover the lens 35 that covers the entire surface of the light irradiation side of the light source substrate 34. Note that the above-mentioned fastening members 81, 81A, 81B and temporary fastening members 81K can be screws or any other known fastening members other than screws.
An annular gasket 91 is disposed on the outer periphery of the translucent globe 12 and extends along the outer periphery. The temporary fastening member 81K temporarily fastens the gasket 91 and the translucent globe 12 to the housing 32 by clamping a part of the gasket 91 between the temporary fastening member 81K and the housing 32. The temporary fastening member 81K corresponds to the "temporary fastening member" of the present invention. The gasket 91 and its surrounding structure will be described later.

6, in this configuration, in addition to the components (light source board 34, lens 35) for functioning as the light source unit 31, a power supply board 51A constituting a power supply circuit 51 is housed in the housing 32 of the light source unit 31, and the light-transmitting globe 12 is temporarily fixed thereto. As a result, the light source unit 31, the power supply circuit 51, etc. are unitized into a single lighting unit 10X.
As a result, by attaching and detaching the lighting unit 10X, the multiple components including the light source section 31 and the power supply circuit 51 can be attached and detached all at once. Therefore, the multiple components can be easily attached and replaced.

The lighting unit 10X also includes the terminal block 41, as well as electrical connection members (excluding the power supply line) for electrically connecting the terminal block 41, the boards 51A and 34, etc.

Moreover, by preparing lighting units 10X of various specifications and incorporating them into the same frame body 21, it becomes easy to line up a lighting fixture series with low to high output at low cost. Moreover, it is easy to change the lighting specifications after the lighting fixture 1 is installed on the support pole 2, and it is also easy to change to lighting with a different color temperature. Furthermore, if an abnormality such as failure to light occurs after the lighting fixture 1 is installed on the support pole 2, a spare lighting unit 10X can be brought with you to enable prompt restoration work on-site.
Furthermore, since the power supply circuit 51 is disposed inside the light source unit 31, it is possible to eliminate the need for waterproofing measures and heat countermeasures dedicated to the power supply circuit 51, and to simplify the structure of these measures.

FIG. 7 is a diagram of the lighting unit 10X and the housing 32 of the lighting fixture 1 as viewed obliquely from above, and FIG. 8 is a diagram of the lighting unit 10X and the housing 32 of the lighting fixture 1 as viewed obliquely from below.
7 and 8, a plurality of fastening portions 21N (see FIG. 7, for example, female threads) are provided at intervals around the opening 13 on the bottom plate portion 21L of the frame body 21. The housing 32 of the light source unit 31 has an annular flange portion 32F that can be placed on the bottom plate portion 21L of the frame body 21. Through holes 32H (see FIG. 7) are provided in the flange portions 32F at positions corresponding to the fastening portions 21N.
The flange portion 32F is placed on the bottom plate portion 21L of the frame body 21, and as shown in Fig. 8, a plurality of unit fastening members 81D (e.g., screws) are fastened to the fastening portions 21N from above through the through holes 32H, respectively, thereby fixing the lighting unit 10X to the frame body 21. The bottom plate portion 21L of the frame body 21 can also be said to be a support portion that supports the lighting unit 10X.

(Cover open holding mechanism 61)
Next, the cover open holding mechanism 61 will be described.
As shown in Figure 3, the lighting device 1 has a connecting member 62 connected to the cover 22 at a position closer to the fulcrum S than a central position LC (Figure 3) between one end of the cover 22 on the fulcrum S side and the other end located on the opposite side of the fulcrum S.
The cover open holding mechanism 61 is a mechanism that guides the movement of the connecting member 62 so as to allow the cover 22 to be opened and closed freely, and prevents the cover 22 from returning by regulating the movement and range of movement of the connecting member 62, thereby enabling the cover 22 to be held in an open, open state.

9 is a side cross-sectional view showing the cover open holding mechanism 61 together with the surrounding configuration, in which the reference character A indicates the state in which the cover 22 is fully open, and the reference characters B, C, and D indicate the respective states of the cover 22 as it is closed in that order. Also, the reference character E in FIG. 9 indicates a plan view of the connecting member 62.
The connecting member 62 is formed of a rod-shaped member with both ends bent into a U-shape (also called a gate shape). Hereinafter, in the connecting member 62, the end 62A attached to the cover 22 is referred to as the "cover side end 62A," and the end 62B attached to the lighting unit 10X (light source section 31) is referred to as the "unit side end 62B."

The cover open holding mechanism 61 has a rail portion 65 that guides the unit side end 62B (corresponding to the end opposite the cover 22) of the connecting member 62 in a direction in which the cover 22 can be opened and closed (horizontal direction α in the drawing indicated by symbol A in Figure 5), and a movement restricting portion 66 that can restrict the movement of the connecting member 62 when the cover 22 is in a predetermined open state (open state indicated by symbols A and B).
In this configuration, the upper surface of the valley portion 32T of the housing 32 also serves as the rail portion 65. In other words, the unit side end portion 62B of the connecting member 62 is guided in the horizontal direction α along the upper surface of the valley portion 32T as shown by the symbols A to D in Fig. 9, thereby enabling the cover 22 to be smoothly opened and closed from the open state to the closed state.

As shown by symbol A in Figure 9, the valley portion 32T of the housing 32 is formed with a movement-limiting protrusion 67 that protrudes upward at a position of the rail portion 65 closest to the fulcrum S, and a movement-limiting recess 68 that is recessed downward on the opposite side of the fulcrum S from the movement-limiting protrusion 67.
When the cover 22 is in the open state indicated by reference character A in Fig. 5, the unit side end 62B of the connecting member 62 abuts against the wall surface of the movement limiting protrusion 67, thereby restricting the cover 22 from opening any further. Furthermore, when the cover 22 is in the open state indicated by reference character B in Fig. 5, the unit side end 62B of the connecting member 62 abuts against the wall surface of the movement limiting recess 68, thereby restricting the cover 22 from closing any further. In this way, the movement limiting protrusion 67 and the movement limiting recess 68 form a movement limiting portion 66 that holds the cover 22 in the open state indicated by reference character A or B.

When closing the cover 22 from an open state, the unit side end 62B of the connecting member 62 is moved to a position higher than the movement restriction recess 68, so that the unit side end 62B of the connecting member 62 can be slid to close the cover 22, as shown by symbols C and D in Figure 5.

The movement restricting protrusion 67 is formed in a shape that restricts the movement of the connecting member 62 from shifting in the left-right direction when the unit side end 62B of the connecting member 62 abuts against the movement restricting protrusion 67. For example, when the unit side end 62B of the connecting member 62 abuts against the movement restricting protrusion 67, the movement restricting protrusion 67 fits within the left-right width WA of the unit side end 62B, thereby restricting the left-right movement of the unit side end 62B.
The movement restricting recess 68 is also formed in a shape that restricts the coupling member 62 from shifting in the left-right direction when the unit side end 62B of the coupling member 62 abuts against the movement restricting recess 68. For example, the movement restricting recess 68 is formed to have approximately the same width (left-right length) as the maximum left-right width of the unit side end 62B of the coupling member 62, thereby restricting the left-right movement of the unit side end 62B.

Since the movement restricting protrusion 67 and/or the unit side end 62B restrict the connecting member 62 from shifting in the left-right direction, the open state of the cover 22 is stabilized.
Since the movement restricting protrusions 67 are formed in the valleys 32T of the housing 32 of the light source unit 31, the height of the cover open holding mechanism 61 can be reduced compared to a configuration in which movement is restricted by attaching an L-shaped metal fitting or the like to the upper surface 32A of the housing 32 instead of the movement restricting protrusions 67. This makes it easier to reduce the height H of the lighting unit 10X, improving the degree of freedom in the external shape of the lighting unit 10X.

Furthermore, the cover open holding mechanism 61 has a fall prevention member 69 that is disposed between the rail portion 65 and the rail portion 65 with a gap therebetween that is sufficient to guide the unit side end portion 62B of the connecting member 62.
The fall-off prevention member 69 is formed of a plate-like member extending in the horizontal direction α, and is fixed to the housing 32 by a known fastening member 81E such as a screw. Note that, although Fig. 5 illustrates an example in which the fall-off prevention member 69 is fixed to the movement restriction protrusion 67, the fall-off prevention member 69 may be fixed to a position other than the movement restriction protrusion 67.

The width of the cover open holding mechanism 61 may be adjusted to restrict the unit side end 62B of the connecting member 62 from shifting left and right. Alternatively, the width of the rail portion 65 may be adjusted to restrict the unit side end 62B of the connecting member 62 from shifting left and right.

(Packing 91 and its surrounding structure)
Next, the packing 91 and its surrounding structure will be described.
Fig. 10 is a diagram for explaining the packing 91 and its surrounding structure. Reference symbol A in Fig. 10 is a cross-sectional view showing the packing 91 together with the surrounding structure before the lighting unit 10X is attached to the frame body 21, and reference symbol B is a cross-sectional view showing the packing 91 together with the surrounding structure after the lighting unit 10X is attached to the frame body 21.
10, the packing 91 has a packing base 91A with a U-shaped cross section (gate-shaped cross section) that holds the outer periphery of the light-transmitting globe 12, and a brim-shaped packing edge 91B that protrudes from the packing base 91A toward the outer periphery. The packing base 91A and the packing edge 91B extend endlessly around the entire circumference of the packing 91.

As shown by reference symbol A in FIG. 10, the translucent globe 12 including the packing 91 is placed in a position that covers the opening of the housing 32 of the lighting unit 10X, and the temporary fastening member 81K is fastened to the housing 32, so that the head of the temporary fastening member 81K abuts against the packing edge 91B, preventing the packing 91 from falling off the housing 32.

Since the packing 91 is prevented from falling off the housing 32, the light-transmitting globe 12 is also prevented from falling off, that is, the light-transmitting globe 12 is temporarily fixed to the housing 32. This makes it possible to integrate all the parts constituting the lighting unit 10X, including the housing 32 and the light-transmitting globe 12, and makes it easy to handle, such as by installing or replacing the lighting unit.
Alternatively, only the packing base portion 91A may extend endlessly around the entire circumference of the packing 91, and the packing edge portion 91B may be formed only in the area corresponding to the temporary fastening member 81K.

When attaching the lighting unit 10X to the frame body 21, as shown by symbol B in Fig. 10, the lighting unit 10X is placed on the bottom plate portion 21L of the frame body 21, and the lighting unit 10X and the bottom plate portion 21L of the frame body 21 are fastened to each other by a plurality of unit fastening members 81D (see Fig. 8). This fastening force compresses the packing base 91A, which is the part of the packing 91 between the lighting unit 10X and the bottom plate portion 21L of the frame body 21, and closes the gap between the lighting unit 10X and the bottom plate portion 21L of the frame body 21, thereby obtaining a sufficiently waterproof structure.
Even when the lighting unit 10X and the bottom plate portion 21L of the frame body 21 are fastened together and the packing 91 is compressed, the head of the temporary fastening member 81K is configured not to come into contact with the bottom plate portion 21L.

In this configuration, as shown in Fig. 6, one temporary fastening member 81K is provided on each of the two opposing sides of the light-transmitting globe 12 (two in total), but this is not limited to the above. If the lighting unit 10X is large, one temporary fastening member may be provided on each of the four sides of the light-transmitting globe 12, for a total of four, and the number of members and fastening positions may be changed as appropriate.
In addition, the shape of the packing 91 may be changed as appropriate within the range in which a sufficient waterproof structure can be obtained by temporarily fastening the lighting unit 10X with the temporary fastening members 81K and by fixing the lighting unit 10X to the frame body 21.

(Fall prevention wire fixing part 71)
Next, the fall prevention wire fixing portion 71 will be described.
The fall prevention wire fixing part 71 is a part to which the fall prevention wire extending from the support pole 2 is fixed, and is provided in the vicinity of the support pole mounting part 11 inside the housing 10 of the lighting fixture 1 as shown in Fig. 5. As a result, the lighting fixture 1 is not only fixed to the support pole 2 at the support pole mounting part 11, but also fixed to the support pole 2 via the fall prevention wire, providing a double fall prevention structure.

FIG. 11 is a side cross-sectional view showing the fall prevention wire fixing portion 71 together with the surrounding structure.
In FIG. 11, reference numeral 100 denotes a fall prevention wire.
The frame 21 is provided with a convex through-hole passing portion 21S that passes through a through-hole 32K provided in a housing 32 of the lighting unit 10X when the lighting unit 10X is attached. A large-diameter member 95 having a diameter larger than the through-hole 32K is attached to the tip of the through-hole passing portion 21S by using a fastening member 81F. One end of a fall prevention wire 100 extending from the support 2 is wound around the through-hole passing portion 21S and between the housing 32 of the lighting unit 10X and the large-diameter member 95.
7 and 6. A well-known annular member such as a washer may be used as the large diameter member 95. The large diameter member 95 may be formed as an integral part with the fastening member 81F.

However, in a structure in which one longitudinal end of the lighting fixture 1 is supported by a support 2, excessive external force acting on the lighting fixture 1 may cause damage at the point of stress concentration.

In the fall prevention wire fixing part 71 of this configuration, a through-hole passing part 21S that passes through a through-hole 32X provided in the housing 32 of the lighting unit 10X is provided in a relatively strong part of the frame body 21 of the lighting fixture 1, and one end of the fall prevention wire 100 is wound around this through-hole passing part 21S. With this configuration, the fall prevention of the lighting unit 10X and the frame body 12 that constitute the lighting fixture 1 can be prevented by a single fall prevention wire 100.

In addition, a large-diameter member 95 having a diameter larger than the through hole 32K is provided at the tip of the through-hole passage portion 21S, so that the fall prevention wire 100 can be appropriately prevented from falling off. This makes it easier to maintain the connection between the support 2 and the lighting fixture 1 by the fall prevention wire 100.

As described above, in this embodiment, the lighting fixture 1 is provided with a large cover 22 (see FIG. 5, etc.) that extends over the entire top surface thereof, and the terminal block 41 is disposed above the light source unit 31 in an area covered by the cover 22, so that the simple configuration can prevent rainwater and dust from adhering to the terminal block 41. Also, compared to a configuration in which the terminal block 41 is disposed near the pole mounting unit 11, the pole mounting unit 11 and the terminal block 41 can be separated, making it easier to position the terminal block 41 and to route the power supply line at a large bending angle. This makes it easier to eliminate constraints on the positioning of the terminal block 41 and the work of connecting the power supply line.

Moreover, opening the cover 22 allows easy access to each section within the lighting fixture 1, facilitating various operations. Also, a top cover dedicated to the light source section 31 can be omitted.
This cover 22 can be opened and closed freely based on a fulcrum S (FIG. 3) located on the opposite side of the pillar mounting portion 11 from the cover 22, making it easier to perform tasks such as connecting the power supply line from the pillar 2 side to the terminal block 41.

The cover 22 also has a connecting member 62 connected to it at a position closer to the fulcrum S than the center position LC between the tip end 10S, which is one end of the cover 22 on the fulcrum S side, and the base end 10K, which is the other end of the cover 22 away from the fulcrum S (see, for example, Fig. 3). A cover open holding mechanism 61 is configured to guide the movement of the connecting member 62 so that the cover 22 can be opened and closed freely, and to restrict the movement and range of the connecting member 62 to hold the cover 22 in an open state (see, for example, Fig. 9). With this configuration, the cover 22 can be held in an open state, making it easier to access the terminal block 41 and easier to connect power lines.

The cover open holding mechanism 61 has a rail portion 65 that is provided on the light source unit 31 and guides the movement of the connecting member 62, and a movement restricting portion 66 that restricts the movement of the connecting member 62 in a predetermined direction when the cover 22 is in the open state. This configuration makes it possible to smoothly open and close the cover 22, and also stabilizes the open state of the cover 22.
Further, a fall-prevention member 69 that prevents the connecting member 62 from falling off in the upward direction is attached to the light source unit 31 with a gap between it and the rail portion 65. With this configuration, it is possible to prevent the connecting member 62 from falling off.

In addition, a convex portion 32L that functions as a heat equalizing convex portion that guides heat from a high temperature portion to a low temperature portion of the light source portion 31 is provided on the upper surface 32A of the light source portion 31 (for example, FIG. 5). This makes it easier to equalize the heat of the light source portion 31 and cool the high temperature portion.
Furthermore, since the heat shielding plate 22S is provided on the surface of the cover 22 facing the light source unit 31, the temperature distribution of the cover 22 can be adjusted to prevent the formation of icicles and other problems.

Furthermore, the lighting fixture 1 of this embodiment includes a lighting unit 10X in which the light source section 31 and the power supply circuit 51 are integrated into a single unit, and a frame body 21 that supports the lighting unit 10X. The lighting unit 10X is provided with a terminal block 41 that functions as a connecting member that is electrically connected to the power supply circuit 51, and an external power supply line is connected to the terminal block 41 without being connected to the frame body 21. With this configuration, multiple components such as the light source section 31 and the power supply circuit 51 can be detached together, making it easy to install, replace, or change the specifications of these components.

For example, by preparing lighting units 10X with various specifications and incorporating them into the same frame 21, it is possible to create a lineup of lighting fixtures with low to high output at low cost, or a lineup of lighting fixtures with different color temperatures. In addition, by preparing spare lighting units 10X, it is possible to carry out restoration work quickly in the event of an abnormality in existing equipment.

Here, in the above description, the lighting fixture 1 has been described in which one lighting unit 10X is arranged in one frame body 21, but the present invention may also be applied to a lighting fixture in which a plurality of lighting units 10X are arranged in one frame body 21. When a plurality of lighting units 10X are arranged, each lighting unit 10X can be independently attached, replaced, or have its specifications changed.
Although the connection member electrically connected to the power supply circuit 51 is the terminal block 41 in the above description, it may be something other than the terminal block 41, such as a waterproof connector.

In addition, since the terminal block 41 is provided on the upper surface 32A of the light source unit 31, the terminal block 41 does not overlap the frame body 21 in a plan view. Therefore, it is easy to secure the space for arranging the terminal block 41, which is a relatively large component to which multiple wirings are connected independently, and it is easy to access the terminal block 41 from the outside.

10, the lighting unit 10X includes a packing 91 provided around the light-transmitting globe 12, and a temporary fastening member 81K that temporarily fastens the light-transmitting globe 12 and the packing 91 to the housing 32 of the lighting unit 10X. When the lighting unit 10X is attached to the frame 21, the packing 91 is compressed between the frame 21 and the housing 32 of the lighting unit 10X to waterproof the gap between the frame 21, the housing 32, and the light-transmitting globe 12.
According to this configuration, the lighting unit 10X, the packing 91, and the light-transmitting globe 12 can be temporarily fastened together to form a single unit, making them easier to handle. Also, sufficient waterproof performance can be easily obtained when the lighting unit 10X is attached to the frame 21.

The packing 91 has a packing base 91A that holds the outer periphery of the translucent globe 12, and a packing edge 91B that protrudes from the packing base 91A toward the outer periphery. The temporary fastening member 81K temporarily fastens the packing edge 91B to the housing 32, and when the lighting unit 10X is attached to the frame 21, the packing base 91A is compressed between the frame 21 and the housing 32 of the lighting unit 10X to close the gap. In this way, the packing 91 is provided with the packing edge 91B that is temporarily fastened by the temporary fastening member 81K, and the packing base 91A that closes the gap when the lighting unit 10X is attached to the frame 21, separately, making it easier to perform both temporary fastening and gap sealing appropriately.

10, the frame 21 is provided with a convex through-hole passing portion 21S that passes through a through-hole 32K provided in the lighting unit 10X when the lighting unit 10X is attached, and a large-diameter member 95 having a diameter larger than that of the through-hole 32K is attached to the tip of the through-hole passing portion 21S. One end of the fall prevention wire 100 extending from the support 2 is wound around the through-hole passing portion 21S and between the lighting unit 10X and the large-diameter member 95. With this configuration, the fall prevention of the lighting unit 10X and the frame 12 can be appropriately performed with a single fall prevention wire 100.

The above-described embodiment merely shows one aspect of the present invention, and any modification and application can be made without departing from the spirit of the present invention. For example, an LED is given as an example of a light-emitting element provided in the light source unit 31, but the light-emitting element does not have to be limited to an LED, and may be other elements such as an organic EL element.

REFERENCE SIGNS LIST 1 Lighting fixture 2 Support 10 Housing of lighting fixture 10X Lighting unit 11 Support mounting part (fixing part)
12 Light-transmitting globe 13 Opening 21 Frame 21S Through-hole passage 22 Cover 22S Heat shield 31 Light source 32 Housing of light source (housing of lighting unit)
32A Upper surface of the light source part (upper surface of the lighting unit)
32H, 32K, 32X Through holes 32L Convex part (heat uniforming convex part)
41 Terminal block 51 Power supply circuit 61 Cover open retention mechanism 62 Connecting member 65 Rail portion 66 Movement restriction portion 69 Fall restriction member 71 Fall prevention wire fixing portion 81, 81A, 81B, 81E, 81F Fastening member 81D Unit fastening member 81K Temporary fastening member 91 Packing 91A Packing base 91B Packing edge 95 Large diameter member 100 Fall prevention wire S Fulcrum

Claims (7)

a light source unit in which a light emitting element is disposed and which irradiates light through a light-transmitting globe;
a power supply circuit for supplying power to the light source unit;
A terminal block to which an external power supply line is connected;
A lighting fixture having a fixing part that can be attached to a pole,
a cover extending over an entire top surface of the lighting fixture;
The upper surface of the light source unit is provided with relatively high peaks on both sides in the width direction,
A valley portion is formed between the peak portions,
The lighting device, wherein the terminal block is disposed in the valley portion of the upper portion of the light source unit, in an area covered by the cover, and in a substantially central position in the front-to-rear direction of the light source unit . The lighting fixture according to claim 1 , wherein the cover is capable of being opened and closed with reference to a fulcrum located on an opposite side of the fixing portion with respect to the cover. a connecting member connected to the cover at a position closer to the fulcrum than a center position between one end of the cover on the fulcrum side and the other end of the cover away from the fulcrum,
The lighting fixture according to claim 2, further comprising a cover open/close holding mechanism that guides the movement of the connecting member so as to allow the cover to be opened and closed freely, and that restricts the movement and range of movement of the connecting member to hold the cover in an open state. The lighting device according to claim 3, characterized in that the cover open retention mechanism has a rail portion provided on the light source portion for guiding movement of the connecting member, and a movement restriction portion for restricting movement of the connecting member in a predetermined direction when the cover is in an open state. The lighting fixture according to claim 4 , wherein a fall-prevention member is attached to the light source unit with a gap between the light source unit and the rail unit, the fall-prevention member preventing the connecting member from falling off in an upward direction. The lighting fixture according to claim 1 , further comprising a heat equalizing protrusion on an upper surface of the light source unit for conducting heat from a high temperature portion of the light source unit to a low temperature portion of the light source unit. The lighting fixture according to claim 1 , further comprising a heat shielding plate provided on a surface of the cover facing the light source unit.

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