JP2002260410A - Pole lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily replace a light source by working on the ground and also ensure higher level in lighting effects. SOLUTION: A light source 3 is provided at height within arm's reach directly from the ground in an intermediate area of a strut S. A lower reflector plate and up upper reflector plate 6 illuminate downward from the top of the strut, while an intermediate illuminating section 5 on the intermediate area of the strut S externally projects light obliquely-downward to also function as a footlight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pole light which is constructed by attaching a light source to a support and is used as a street light, a garden light and the like.

[0002]

2. Description of the Related Art Conventionally, a general pole lamp is configured by attaching a light source with a reflector to an upper end of a column.

[0003] Therefore, since the light source (lamp) is located at a high place (several meters above the ground) that is not directly accessible from the ground, replacement of the light source is troublesome.

[0004] On the other hand, there has been proposed a structure in which a support is configured to be a middle folding type with an intermediate point serving as a support, and the support is bent so that a light source is lowered to a low position and can be directly replaced from the ground.

[0005]

However, according to this structure, a space corresponding to a radius when the support is bent is required, so that it cannot be used in a situation where this space cannot be secured around the support. There were problems such as complications.

It is conceivable to arrange the light source in a low place (intermediate portion of the pole) directly accessible from the ground and to irradiate the light obliquely downward from here. However, the illumination range is narrow and the pole light is used. The original wide-range lighting cannot be performed (it only functions as a foot light), and the light diffuses unnecessarily near the level of the human eyes. The adverse effect of this occurs.

Accordingly, the present invention is to provide a pole lamp in which a light source can be easily replaced from the ground and a high lighting effect can be ensured.

[0008]

According to a first aspect of the present invention, a light source and a lower reflector for reflecting light from the light source upward are provided at an intermediate position in a height direction of the support, and an upper part of the support is provided with: An upper reflector for reflecting the light reflected from the lower reflector downward is provided.

According to a second aspect of the present invention, in the configuration of the first aspect, an intermediate irradiating portion is provided at a position above the light source in the middle portion of the support column, for reflecting part of upward reflected light from the lower reflector outward. It was done.

According to a third aspect of the present invention, in the configuration of the second aspect, the intermediate irradiator has a plurality of louvers for partially reflecting light reflected from the lower reflector outward at a plurality of upper and lower locations. is there.

According to a fourth aspect of the present invention, in the configuration of any one of the first to third aspects, the lower half of the column has a closed-section cylindrical shape through which light does not pass, and the upper half has an open-section frame through which light passes. The light source is provided in the lower half of the column.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the reflecting surface of the lower reflecting plate is formed as a curved surface that reflects the reflected light in the upward direction.

According to a sixth aspect of the present invention, in the configuration of the fifth aspect, the reflecting surface of the lower reflecting plate is formed as a paraboloid.

According to a seventh aspect of the present invention, in the configuration of the fifth or sixth aspect, α is a maximum light projection angle, which is an angle formed by the light on the outermost side of the light entering the upper reflector, and the light is reflected from the lower reflector. When the shift angle of light is β, α is set so that β <β.

According to the above construction, the light source is provided at a low place (intermediate portion of the column), and the light from this light source is radiated downward from the upper portion of the column by the lower reflector and the upper reflector. It can be easily performed, and the original lighting effect of the pole lamp, that is, wide area illumination from a high position can be secured.

In the present invention, it is assumed that the installation position of the light source satisfies the condition of a height position directly accessible from the ground at the time of replacement.

According to the second and third aspects of the present invention, a part of the upward light is reflected outward by the intermediate part (upper part of the light source) by the intermediate illuminating part. Function as a so-called foot light that illuminates

That is, it has both functions of wide-area illumination from a high position and foot illumination from a low position.

According to the third aspect of the present invention, light can be radiated not by a point but by a light column extending over a predetermined length range, not by a point, by a plurality of upper and lower louvers. Can be.

On the other hand, according to the configuration of the fourth aspect, the upper half of the column is formed in a frame shape with an open cross section through which light can pass, so that the reflected light from the lower reflector can be efficiently transmitted to the upper reflector. Can be reached. For this reason, the reflection range (illumination range) of the light from the upper reflector can be expanded.

According to the configuration of the fifth to seventh aspects, the reflecting surface of the lower reflecting plate is formed as a curved surface (parabolic surface in claim 6) for reflecting the reflected light in the upward direction. To the upper reflector without waste (light leakage is reduced), that is, the illumination efficiency can be further improved.

In particular, if a parabolic surface is provided as in claim 6,
Since the light can be reflected right above at all the reflection points of the lower reflector, the effect of this point becomes remarkable.

Here, the maximum projection angle α to the upper reflector is
And the deviation angle β of the reflected light from the lower reflector can be set in two ways: (a) α> β (b) α <β.

Of these, in order to satisfy the relationship (a), the value of β needs to be reduced, but for that, the diameter of the lower reflector must be increased. In practice, it is difficult to apply to the pole light to be received.

In this regard, according to the configuration of claim 7, since the above (b) is set, the diameter of the lower reflector can be reduced in accordance with the actual diameter of the pole lamp.

In other words, much light from the light source can be reflected by the small lower reflector.

According to the setting (b), there is a possibility that the light flux on the outer peripheral side of the reflected light from the lower reflecting plate protrudes from the upper reflecting plate, resulting in wasted illumination.

In this case, the provision of the intermediate irradiating unit according to the second and third aspects makes it possible to pick up the light flux on the outer peripheral side by this intermediate irradiating unit and utilize it for illumination without waste.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a lower support, and 2 denotes an upper support mounted on the lower support 1, which forms a support S for a pole light. 3, a light source (a slightly elongated lamp is used in the example) 3 and a lower reflector 4 and an intermediate irradiator 5 functioning as a foot light are provided, respectively. A plate 6 is provided.

The lower support 1 is formed in a cylindrical shape having a closed cross section that does not allow the light from the light source to pass sideways, and is installed on the ground by a base 7 at the lower end.

On the other hand, the upper column 2 is formed in a frame shape with an open cross-section through which light passes horizontally by a plurality of vertical pipes, and the reflected light from the lower reflecting plate 4 passes through the inside and outside of the upper column 2. Regardless of the type, the light goes straight toward the upper reflector 6.

The light source 3 is provided in the upper portion of the lower column 1 on the column center line O, and is inclined obliquely together with the socket 8 as shown by the phantom line in FIG. Not covered with a retractable cover) 9.

The intermediate irradiation section 5 includes a plurality of louvers 10 provided at intervals in the vertical direction.

The louvers 10 are reflection surfaces whose lower surfaces are inclined so as to spread downward, and a part of the light reflected from the lower reflecting plate 4 (light toward the outer peripheral side) is directed outward (obliquely downward) by the louvers 10. Is reflected to the outside. Reference numeral 11 denotes a light-transmitting cover made of glass or the like that covers the louvers 10 from the periphery.

The upper reflecting plate 6 has a reflecting surface (which may be any of a flat inclined surface, an arc surface, an elliptical surface, and a paraboloid) facing the lower reflecting plate 4 on the lower surface. The reflected light is reflected obliquely downward as shown in FIGS.

In this pole lamp, the light source 3 includes a support S
And is located at a height position (for example, 1.5 m or less above the ground) where it can be directly reached from the ground and can be replaced. Therefore, the replacement of the light source 3 can be easily performed from the ground without using an aerial work vehicle or a ladder.

In addition, while the light source 3 is installed at a low place as described above, the light from the light source 3 is reflected upward by the lower reflector 4 and is radiated downward by the upper reflector 6 from above the support. It is possible to secure the original lighting effect of the pole lamp, that is, wide-range lighting from the position.

Further, since part of the upward light is turned laterally (diagonally downward) at the middle part of the column and radiated to the outside by the intermediate irradiation part 5, it also has a function as a so-called foot light for illuminating a low position. become.

Here, the irradiating section 5 can irradiate light not by a point but by a light column extending over a predetermined length range, not by a point, by a plurality of upper and lower louvers 10. be able to.

On the other hand, since the upper half of the support (upper support 2) is formed in a frame shape with an open cross section through which light can pass, the reflected light from the lower reflector 4 efficiently reaches the upper reflector 6. Can be done. For this reason, the reflection range (illumination range) of the light from the upper reflector 6 can be expanded.

Incidentally, the upper surface (reflection surface) of the lower reflection plate 4
It is desirable that the light source 3 be curved (an arc surface, an elliptical surface, a paraboloid) so that the light from the light source 3 can be efficiently turned upward to reach the upper reflector 6 without waste.

Above all, if the paraboloid is used, the lower reflector 4
Since the light can be reflected directly above all the reflection points, the effect of this point becomes remarkable.

Therefore, in this embodiment, the lower reflector 4
Is a paraboloid, and specific conditions are set for this paraboloid.

This will be described in detail with reference to FIGS.

FIG. 4 shows the state of light incident on the upper reflector 6 when the light source 3 and the lower reflector 4 are viewed as one light source unit, and α is the outermost side of the light entering the upper reflector 6. Is the maximum light projection angle, which is the angle formed by the light.

The maximum light projection angle α is expressed as follows: α = 2 × {(tan ⁻¹ (b / 2) / L}) in relation to the light projection distance L and the diameter b of the reflection surface of the upper reflection plate 6. Is done.

On the other hand, in FIG. 5, β is a shift angle of light from the lower reflecting plate 4, and the shift angle β is equal to an angle when the light source 3 is viewed from the reflection point P.

When the horizontal direction is the x-axis and the vertical direction is the y-axis with the vertex of the paraboloid serving as the reflecting surface of the lower reflecting plate 4 as the coordinate center, the parabola is expressed as y = ax ² (a is Any value specified).

When the horizontal angles of light entering the lower reflector 4 from the upper and lower ends of the light source 3 are A and B, the shift angle β
Becomes β = AB.

In FIG. 5, f is the center of the light source and the focus of the parabola, C is the vertical length of the light source 3, xp is the horizontal position of the reflection point, and yp is the vertical position.

Here, the maximum projection angle α to the upper reflector is
And the deviation angle β of the reflected light from the lower reflector, two settings are possible: (a) α> β (parabolic I in FIG. 6) (b) α <β (same II).

Of these, in order to establish the relationship (a), the value of A in FIG. 5 needs to be reduced, and since the angle difference between A and B is reduced, ypｙxp It needs to be in a state.

In order to increase the value of xp, it is necessary to increase the diameter of the lower reflecting plate 4. However, this is practically difficult due to the limitation of the inner diameter of the support.

In view of this point, in this embodiment,
By setting the relationship of α <β, the diameter of the lower reflector 4 is reduced in accordance with the actual diameter of the pole lamp.

Further, as shown in FIG. 6, even if the angles θ1 and θ2 contributing to the reflection of light are the same for the parabola I when α> β and the parabola II when α <β. The parabola II of this embodiment receives more light in the horizontal direction. Since the amount of light in the horizontal direction is the largest, the amount of light reflected from the lower reflector 4 increases by setting α <β (parabola II), which can contribute to illumination. The amount of light can be increased.

According to the setting of α <β, the amount of light that is released from the upper reflector 6 and radiated to the atmosphere (waste of illumination)
May also increase.

In this case, in this embodiment, since the intermediate irradiation section 5 is provided, the light beam on the outer peripheral side can be picked up by the intermediate irradiation section 5 and irradiated to the feet.

Other Embodiments (1) In the above embodiment, the paraboloid II satisfying the relationship α <β is adopted for the reflecting surface of the lower reflecting plate 4 from the viewpoint of reducing the diameter of the reflecting surface. A parabola I that satisfies the relationship α> β may be adopted.

(2) As for the reflecting surface of the lower reflecting plate 4, it is desirable to adopt the paraboloid described in the above embodiment.
An elliptical surface approximating a paraboloid may be employed, or an arc surface may be employed.

(3) In the case of a particularly high pole lamp, the intermediate irradiating section 5 may be provided at a plurality of upper and lower portions. Alternatively, in the case of a particularly low pole light, the intermediate illuminating unit 5 may be omitted, the reflected light from the lower reflector 4 may be reflected only by the upper reflector 6, and illumination may be performed using only the reflected light.

[0062]

As described above, according to the present invention, the light source is provided in the middle of the column, and the light from this light source is radiated downward from the upper portion of the column by the lower reflector and the upper reflector. The light source can be easily replaced from the ground, and the original lighting effect of the pole lamp, that is, wide-area lighting from a high position can be secured.

According to the second and third aspects of the present invention, since the intermediate illuminating portion reflects part of the upward light outward at the intermediate portion of the support, the intermediate illuminating portion functions as a foot light, The lamp as a whole will have both functions of wide-area illumination from a high position and foot illumination from a low position.

In particular, according to the third aspect of the present invention, light can be radiated not by a point but by a light column extending over a predetermined length range, not by a point, by a plurality of upper and lower louvers. Can be.

On the other hand, according to the invention of claim 4, since the upper half of the column is formed in a frame shape with an open cross section through which light can pass, the reflection range of the light from the upper reflector (illumination) Range).

According to the fifth to seventh aspects of the present invention, since the reflecting surface of the lower reflecting plate is formed as a curved surface (parabolic surface in claims 6 and 7) for reflecting the reflected light in the upward direction, It is possible to make the reflected light from the reflection plate reach the upper reflection plate without waste, that is, it is possible to further enhance the illumination efficiency.

In particular, if a parabolic surface is provided as in claim 6,
Since the light can be reflected right above at all the reflection points of the lower reflector, the effect of this point becomes remarkable.

Further, according to the invention of claim 7, a large number of light sources can be reflected by the small lower reflector. Further, by combining with the configuration of the second and third aspects in which the intermediate irradiating section is provided, the light beam on the outer peripheral side can be picked up by the intermediate irradiating section and reflected light can be utilized for illumination without waste.

[Brief description of the drawings]

FIG. 1 is an overall front view of a pole lamp according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged half sectional front view of the same part.

FIG. 4 is a diagram showing a maximum light projection angle α, which is an angle formed by light on the outermost side of light entering the upper reflector.

FIG. 5 is a diagram showing a relationship between light entering a lower reflector from a light source and reflected light.

FIG. 6 is a diagram for explaining a difference in an angle contributing to light reflection between two reflectors having different paraboloid settings as reflection surfaces.

[Explanation of symbols]

 S Support 1 Lower support (lower half of support) 2 Upper support (upper half of support) 3 Light source 4 Lower reflector 5 Intermediate irradiator 10 Louver of intermediate irradiator 6 Upper reflector

Claims (7)

[Claims] A light source and a lower reflector for reflecting the light from the light source upward are provided at an intermediate position in the height direction of the support, and the reflected light from the lower reflector is provided above the support in a downward direction. A pole lamp characterized by being provided with an upper reflector for reflecting light. 2. In a position above the light source in the middle part of the support,
2. The pole lamp according to claim 1, further comprising an intermediate irradiator for reflecting part of upward reflected light from the lower reflector outward. 3. The pole lamp according to claim 2, wherein the intermediate irradiator has a plurality of louvers for partially reflecting light reflected from the lower reflector outward at a plurality of upper and lower portions. 4. A lower half of the column is formed in a cylindrical shape with a closed cross section that does not allow light to pass therethrough, and an upper half is formed in a frame shape with an open cross section that allows light to pass through, and a light source is provided in the lower half of the column. 4. The pole lamp according to claim 1, wherein: 5. The pole lamp according to claim 1, wherein the reflection surface of the lower reflection plate is formed as a curved surface that reflects the reflected light in the upward direction. 6. The pole lamp according to claim 5, wherein the reflection surface of the lower reflection plate is formed as a paraboloid. 7. When the maximum projection angle, which is the angle formed by the outermost light among the light entering the upper reflector, is α, and the shift angle of the reflected light from the lower reflector is β, α <β 7. The pole lamp according to claim 6, wherein the setting is made to be as follows.