JP2021064587A - Adapter and lighting device - Google Patents

Abstract

To provide an adapter which can be fixed to several types of columns and prevents exposure of a projection such as a fitting screw.SOLUTION: A lighting device 10 is attached to an adapter and the adapter is fixed to a column 20. The adapter includes a second insertion part 40 which is inserted into the column 20. The second insertion part 40 is provided with a fixing member 60 which extends in the column 20 in a manner that the fixing member 60 can press an inner wall 28 of the column 20 and which is fixed to the column 20.SELECTED DRAWING: Figure 6

Description

The present invention relates to an adapter and a lighting device.

Conventionally, in a luminaire attached to the tip of a stanchion, the existing stanchion may be used as it is and the luminaire may be replaced. Since there are multiple types of column diameters, an adapter or the like for attaching a lighting fixture according to the column diameter is required. As a structure for attaching a lighting fixture to a plurality of types of columns, a tubular mounting member having an open end face is provided on the fixture body in which the light source module is arranged, and this mounting member is placed on the column to cover the column from the outside of the mounting member. A structure for fastening mounting screws until they come into contact with each other is disclosed (see, for example, Patent Document 1).

JP-A-2017-162685

However, in the conventional structure, since the mounting screw corresponding to the fixing member for fixing the adapter to the support is exposed to the outside, there is a risk of spoiling the appearance, or when the support is about 1 m high, a person can use the mounting screw. May come in contact with the head. Further, if the mounting screw matching the minimum diameter column is used for the maximum diameter column, the amount of protrusion of the screw increases, so it is necessary to change the mounting screw according to the diameter of the column.
An object of the present invention is to provide an adapter that can be fixed to a plurality of types of columns and that does not expose protrusions such as mounting screws, and a lighting device.

The present invention is an adapter fixed to a support column to which a luminaire is attached, which includes an insertion portion to be inserted into the support column, and the insertion portion extends so as to be able to press the inner wall of the support column inside the support column. The adapter is provided with a fixing member fixed to the support column.

The present invention is characterized in that, in the adapter, the fixing member includes a pair of telescopic portions that expand and contract so as to be pressed from the insertion portion to the facing inner wall region of the inner wall.

According to the present invention, in the adapter, the fixing member has a body portion that can expand and contract the pair of the expansion and contraction portions, and the expansion and contraction amounts of the pair of the expansion and contraction portions with respect to the rotation of the body portion are uniform. It is a feature.

The present invention is characterized in that the adapter has a plurality of positioning portions capable of positioning at each of the plurality of types of columns having different end shapes.

The present invention is characterized in that, in the adapter, the plurality of positioning portions have a plurality of step portions that form steps along the circumferences of different diameters centered on the axial center position of the insertion portion. And.

According to the present invention, in the adapter, the plurality of step portions project toward the support column inserted into the insertion portion so as to go outward in the radial direction about the axial position of the insertion portion. It is a feature.

The present invention is characterized in that, in the adapter, the plurality of positioning portions have a plurality of corner portions that form steps along the outer circumferences of different polygonal shapes centered on the axial center position of the insertion portion. And.

The present invention is a lighting device comprising the adapter described in any of the above.

According to the present invention, it can be fixed to a plurality of types of columns, and it is possible to prevent protrusions such as mounting screws from being exposed.

It is a side view of the lighting apparatus which concerns on embodiment of this invention. It is a perspective view which looked at the adapter from the top surface side. It is a perspective view which looked at the adapter from the bottom surface side. It is a side view of an adapter. It is a perspective view which looked at the adapter body from the top surface side. FIG. 4 is a sectional view taken along line VI-VI of FIG. It is a figure which shows the structure of the fixing member, (A) is a side view, (B) is a perspective view, (C) is a side view when the telescopic part is extended. It is a perspective view which looked at the adapter which concerns on the modification of this invention from the lower surface side. It is a perspective view which looked at the adapter which concerns on other modification of this invention from the lower surface side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of the lighting device 1 according to the embodiment of the present invention.
The lighting device 1 includes a lighting fixture 10 that emits illumination light, a support column 20 that is erected on the ground or the like, and an adapter 30 that connects the lighting device 10 and the support column 20.
The lighting fixture 10 is arranged at the tip of the support column 20 via an adapter 30 and emits illumination light that illuminates a road surface such as a sidewalk.

The support column 20 is formed in a straight tubular pole type (also referred to as a straight type). The support column 20 of the present embodiment is set to a height at which the height of the lighting fixture 10 fixed to the support column 20 is equal to or less than the line of sight of a pedestrian, and the lighting device 1 is used as a so-called approach light. The height of the support column 20 may be appropriately adjusted according to the installation location and application, and the support column 20 may be other than the straight type.

Next, the adapter 30 will be described.
FIG. 2 is a perspective view of the adapter 30 viewed from the upper surface side, and FIG. 3 is a perspective view of the adapter 30 viewed from the lower surface side. FIG. 4 is a side view of the adapter 30, and FIG. 5 is a perspective view of the adapter main body 32 as viewed from above. Further, FIG. 6 is a sectional view taken along line VI-VI of FIG. In FIG. 6, the luminaire 10 and the support column 20 are shown by broken lines.
As shown in FIGS. 2 and 3, the adapter 30 includes an adapter main body 32 having two tubular portions 33 and 40 integrally, and a fixing member 60 provided on the tubular portion 40.
The tubular portion 33 functions as a first insertion portion into which the lower portion 12 (FIG. 5) of the lighting fixture 10 is inserted, and the tubular portion 40 functions as a second insertion portion inserted into the support column 20.

The first insertion portion 33 is formed in a cylindrical shape having an inner diameter substantially the same as that of the lower portion 12 of the luminaire 10, and the second insertion portion 40 is formed in a cylindrical shape having a diameter smaller than that of the first insertion portion 33. Further, the adapter main body 32 has an annular plate-shaped annular plate portion 35 extending between the lower end of the first insertion portion 33 and the upper end of the second insertion portion 40.
The first insertion portion 33 is provided with female screw holes 38 at intervals in the circumferential direction, and the screw member is fastened to the female screw hole 38 with the lower portion 12 of the lighting fixture 10 inserted in the first insertion portion 33. Thereby, the luminaire 10 is fixed to the adapter 30.
The second insertion portion 40 is formed in a tubular shape having a diameter smaller than that of the support column 20, and is opposite to the first insertion portion 33 from the periphery of the central hole 34 of the annular plate portion 35 (the lower surface side of the annular plate portion 35, the support column). It protrudes downward in the direction toward (20 side). The first insertion portion 33 and the second insertion portion 40 are arranged coaxially with the axis of the adapter main body 32. However, the first insertion portion 33 may have a shape other than the cylindrical shape as long as the lighting fixture 10 can be fixed. Further, the first insertion portion 33 may have an axial center different from that of the adapter main body 32.

As shown in FIGS. 4 and 5, insertion holes 42 that penetrate the second insertion portion 40 in the radial direction are provided at two locations on the side surface of the second insertion portion 40. The insertion holes 42 are arranged so as to face each other with the central axis (also referred to as an axial center) of the second insertion portion 40 interposed therebetween, and are formed in a rectangular hole shape through which the expansion / contraction portion 61 described later can pass. The central axis of the second insertion portion 40 coincides with the central axis (also referred to as the axial center) of the adapter 30 and the adapter main body 32.
A locking groove 44 cut out with a predetermined width toward the tip of the second insertion portion 40 is provided on the lower side of each insertion hole 42. In the circumferential direction of the second insertion portion 40, the width dimension of the locking groove 44 is formed shorter than the width dimension of the insertion hole 42.

As shown in FIGS. 3 and 6, on the lower surface of the annular plate portion 35, a plurality of step portions 50 (in the present embodiment, five types of step portions 50A) project downward as they go outward in the radial direction of the adapter main body 32. , 50B, 50C, 50D, 50E). Each step portion 50A to 50E forms a plurality of wall surfaces coaxial with the axis of the adapter body 32 and having different diameters, and is continuous in the circumferential direction coaxially with the axis of the adapter body 32 on the inner peripheral side of each wall surface. A plurality of lower surfaces to be formed are formed. As shown in FIG. 6, for example, the step portion 50A is provided with a lower surface 50A1 and a wall surface 50A2.
The lower surface 50A1 is a horizontal surface provided at each step 50 so as to be substantially parallel to the upper surface of the annular plate 35, and the wall surface 50A2 is provided at each step 50 with respect to the lower surface of the annular plate 35. It is a vertical plane erected almost vertically. The same applies to the lower surface and the wall surface of the other step portions 50.

As shown in FIG. 3, the lower surface of each step portion 50 is preferably a continuous surface along the circumferential direction of the adapter main body 32, but is not limited to this, and is the same in the height direction of the adapter main body 32. As long as two or more support surfaces having a height are provided, the surface may be discontinuous.
For example, there are two notches on the lower surface of the annular plate portion 35 toward the upper surface of the annular plate portion 35 so that the height is the same in the height direction of the adapter main body 32 along the circumferential direction of the adapter main body 32. A pair of notched surfaces provided by being provided may be provided at predetermined heights.

When fixing the adapter 30 to the support column 20, by aligning the center of the adapter 30 with the center of the support column 20 and arranging it at the tip of the support column 20, any lower surface having substantially the same diameter as the support column 20 and continuous in the circumferential direction becomes the support column. It is arranged in a state of surface contact with the tip of 20. At this time, if there is a wall surface having the same diameter as the outer diameter of the support column 20, the wall surface abuts on the outer peripheral surface of the support column 20 and the adapter 30 and the support column 20 are coaxially positioned. For example, FIG. 6 shows a case where the tip of the support column 20 is in surface contact with the lower surface 50A1 and the outer peripheral surface of the support column 20 is in contact with the wall surface 50A2.
Even if there is no wall surface having the same diameter as the outer diameter of the support column 20, the support column 20 is arranged between adjacent wall surfaces close to the outer diameter of the support column 20, so that the adapter 30 and the support column 20 are positioned substantially coaxially. To.

As a result, each step 50 engages with the tip of the support column 20 as a positioning portion of the adapter 30, so that the adapter 30 can be positioned on each of the circular tube-shaped columns 20 having different diameters, and the adapter 30 and each support column 20 can be positioned. Center misalignment can be easily suppressed. Therefore, the misalignment between the luminaire 10 arranged on the adapter 30 and the support column 20 can be easily suppressed, and the replacement work of the luminaire 10 can be facilitated accordingly. Further, since it is not necessary to manufacture the adapter 30 for each of the columns 20 having different diameters, the types of the adapter 30 can be reduced.

Further, on the lower surface of the annular plate portion 35, a plurality of corner portions 52 along the outer shape of the quadrangular columns 20 having different sizes are provided. Each corner portion 52 is formed by cutting out a predetermined portion of any of the step portions 50A to 50E at a substantially right angle toward the outer edge of the adapter main body 32.
In the present embodiment, the step portions 50D and 50E are cut out at intervals of 90 ° with respect to the center of the adapter 30, so that the corner portions 52A and 52B are formed so as to fit into the two types of square columns 20. There is.
As a result, misalignment between the two types of quadrangular columns 20 and the adapter 30 can be easily suppressed. It should be noted that the corners 52 into which the columns 20 having other polygonal tubular shapes such as triangles and hexagons are fitted may be provided.

7A and 7B are views showing the configuration of the fixing member 60, FIG. 7A is a side view, FIG. 7B is a perspective view, and FIG. 7C is a view when the telescopic portion 61 is extended. It is a side view of.
As shown in FIG. 7, the fixing member 60 is arranged inside the support column 20 by being arranged in the second insertion portion 40. The fixing member 60 is a member that expands and contracts in a direction intersecting the axial direction of the support column 20, and is formed as a rod-shaped member as a whole. The fixing member 60 of the present embodiment uses a so-called turnbuckle that expands and contracts in a direction orthogonal to the axial direction of the support column 20.
More specifically, the fixing member 60 includes a tubular body portion 62 and a pair of rod-shaped telescopic portions 61 having a predetermined length, and a pair of support plates screwed to the adapter body 32. The body portion 62 is supported in the second insertion portion 40 by the 70.

A pair of female screw holes 64 are provided at both ends of the body portion 62. These female screw holes 64 are arranged on the same straight line, one female screw hole 64 is formed as a so-called right-hand screw, and the other female screw hole 64 is formed as a left-hand screw (so-called reverse screw).
The expansion / contraction portion 61 includes a pair of male screw members 63 screwed into the female screw holes 64, a pressing portion 67 attached to an end portion 65 of each male screw member 63 on the side away from the body portion 62, and a pressing portion 67 to the body. It integrally has a plate-shaped locking portion 69 extending toward the portion 62 side.

A known screw member is used for the male screw member 63, and the pressing portion 67 is attached to the end portion 65 corresponding to the head side of the male screw member 63 by screwing into the male screw member 63. By rotating the body portion 62 in the circumferential direction, the pair of male screw members 63 can be moved radially inward or radially outward of the second insertion portion 40. As a result, the fixing member 60 expands and contracts along the radial direction of the second insertion portion 40. For example, as shown in FIGS. 7 (A) and 7 (C), the length dimension of the fixing member 60 in the longitudinal direction is such that the body portion 62 is located from the length X when the telescopic portion 61 is not extended. By rotating it a fixed amount, it can be extended to a length Y.

Each pressing portion 67 projects toward a side away from the body portion 62, and the protruding end of each pressing portion 67 is formed in an uneven shape. As the male screw member 63 moves outward in the radial direction of the second insertion portion 40, each pressing portion 67 moves to the side surface of the second insertion portion 40 as shown in FIGS. 3, 7 (A) and 7 (C). It passes through the insertion hole 42 provided in the second insertion portion 40 and projects outward in the radial direction of the second insertion portion 40. Further, as shown in FIGS. 4, 6 and 7 (C), the locking portion 69 passes through the locking groove 44 and is radially below the body portion 62 along the radial direction of the second insertion portion 40. Extends inward.

Since the locking portion 69 extends in the radial direction of the second insertion portion 40 through the locking groove 44, the second insertion portion 40 moves in the direction in which the expansion / contraction portion 61 moves when the body portion 62 is rotated in the circumferential direction. Can be guided smoothly in the radial direction of. Further, the expansion / contraction portion 61 including the locking portion 69 can be prevented from rotating around the rotation axis of the body portion 62, and functions as a so-called rotation stopper of the expansion / contraction portion 61.

The adapter body 32 includes a clamp 80 capable of holding the wiring connected to the luminaire 10. The clamp 80 includes a holding portion 84 capable of holding wiring, and is attached to the adapter main body 32 via a fixing plate 82. The clamp 80 of the present embodiment is arranged inside the central hole 34.
The wiring is housed inside the support column 20 in a state of extending from below the inside of the support column 20 toward the tip end. When the wiring using a thin cable or the like is housed in the support column 20, there is a possibility that the wiring may fall below the inside of the support column 20 in the replacement work of the lighting fixture 10.
Since the adapter 30 of the present embodiment includes the clamp 80, the operator temporarily sandwiches the wiring removed from the lighting fixture in the holding portion 84 after removing the existing lighting fixture from the support column 20. It is possible.
As a result, the support column 20 can be operated without dropping the wiring below the inside of the support column 20 during the work of attaching the adapter 30 to the support column 20, and the replacement work becomes easy.

In the lighting device 1 of the present embodiment, as described above, the lighting fixture 10 is supported by the support column 20 via the adapter 30.
When fixing the adapter 30 to the support column 20, first, the second insertion portion 40 is inserted into the support column 20 from the upper end opening 22 of the support column 20, and is formed by a step portion 50 having a wall surface having a wall surface having substantially the same diameter as the outer diameter of the support column 20. , The misalignment between the adapter 30 and the support column 20 is suppressed.
After that, the operator rotates the body portion 62 in the circumferential direction of the body portion 62 so that the expansion / contraction portion 61 of the fixing member 60 extends along the radial direction of the second insertion portion 40. As a result, each of the expansion and contraction portions 61 extends toward the inner wall 28 of the support column 20, each pressing portion 67 of the expansion and contraction portion 61 comes into contact with the inner wall 28 of the support column 20, and the tips of these pressing portions 67 strongly contact the inner wall 28. Then, the pair of telescopic portions 61 are moved to a position where the body portion 62 cannot rotate.

Here, each of the pair of telescopic portions 61 extends from both ends of the body portion 62 in the longitudinal direction. Then, the pressing portion 67 of each expansion / contraction portion 61 is pressed against the pair of inner wall regions F1 and F2 that face each other with the central axis of the support column 20 in the inner wall 28. Therefore, the adapter 30 is formed so that the distance from the inner wall 28 can be adjusted in the longitudinal direction of the fixing member 60.

Further, in each telescopic portion 61, the screw pitch of the pair of female screw holes 64 provided in the body portion 62 and the screw pitch of the pair of male screw members 63 screwed into the female screw holes 64 have the same value. .. Therefore, the amount of expansion and contraction of each expansion and contraction portion 61 per rotation of the body portion 62 is the same. Further, each position of the pressing portion 67 forming the tip of each expanding / contracting portion 61 is adjusted in advance so as to be equidistant from the center of the second insertion portion 40 (that is, the axial center of the adapter).

Therefore, when the body portion 62 is rotated in the circumferential direction, the pair of telescopic portions 61 move by the same amount at the same time, and each pressing portion 67 is always located at the same distance from the central axis of the second insertion portion 40. This also suppresses misalignment between the adapter 30 and the support column 20.

In this way, the fixing member 60 of the adapter 30 presses the support column 20 from the inside, so that the adapter 30 is fixed to the support column 20 and the misalignment between the adapter 30 and the support column 20 is suppressed. According to this fixing method, the number of fixing members exposed to the outside of the lighting device 1 can be reduced as compared with the conventional configuration in which the fixing members such as mounting screws are exposed to the outside, and the lighting fixture 10 is attached to a plurality of types of columns 20. Can be attached, and it becomes easy to achieve both improvement in appearance and facilitation of replacement work of the lighting fixture 10.

Further, since the fixing member 60 can extend the pair of telescopic portions 61 steplessly by rotating the body portion 62, even if the strut 20 having a different inner diameter or the inner cross-sectional shape of the strut 20 is non-circular. , The adapter 30 can be fixed to the support column 20.
Further, since the pressing position of the support column 20 by each pressing portion 67 can always be positioned at the same distance from the center of the second insertion portion 40, it is possible to easily suppress the misalignment between the adapter 30 and the support column 20. it can.

As described above, the adapter 30 of the present embodiment includes a second insertion portion 40 to be inserted into the support column 20, and the inner wall 28 of the support column can be pressed against the second insertion portion 40 so as to extend. Since the fixing member 60 to be fixed to the support column 20 is provided, the fixing member 60 can be fixed to a plurality of types of support columns 20 and the number of fixing members exposed to the outside can be reduced.

Further, since the second insertion portion 40 is provided with a pair of expansion / contraction portions 61 that can be pressed against the opposite inner wall regions F1 and F2 of the inner wall 28 of the support column 20, the adapter is provided for a plurality of types of support columns 20 having different inner diameters. 30 can be fixed, and misalignment between the adapter 30 and the support column 20 can be easily suppressed.

Further, the fixing member 60 has a body portion 62 rotatably supported inside the second insertion portion 40, and a pair of expansion / contraction portions 61 are expandable / contractible according to the rotation of the body portion 62. Thereby, the expansion / contraction operation of the pair of expansion / contraction portions 61 can be easily performed.
Moreover, by aligning the pitches of the male screw members 63 used for the pair of telescopic portions 61 to be the same, the amount of expansion and contraction of the pair of telescopic portions 61 with respect to the rotation of the body portion 62 is uniform, so that the adapter 30 and the support column 20 are connected. Center misalignment can be suppressed with high accuracy.

Further, the adapter 30 has a plurality of step portions 50 and a plurality of corner portions 52 which are positioning portions which are positioned by engaging with the tip of the support column 20 in a state where the second insertion portion 40 is inserted into the support column 20. Therefore, the adapter 30 can be easily aligned with the support column 20.

Further, since the adapter 30 has a plurality of step portions 50 along the circumferences of different diameters centered on the axial center position of the second insertion portion 40, the adapter 30 is provided with a circular tube-shaped strut having different diameters. Positioning can be performed on each of the 20s, and misalignment between the adapter 30 and each support column 20 can be easily suppressed.

Further, since the plurality of step portions 50 are provided so as to project downward as they go outward in the radial direction of the adapter main body 32, the wall surface of any of the step portions 50 comes into contact with the outer peripheral surface of the support column 20. , The adapter 30 and the support column 20 can be positioned coaxially. Therefore, the adapter 30 can be fixed to a plurality of types of columns 20 having different outer diameters.

Further, the adapter 30 has a plurality of corner portions 52 forming a step along the outer circumference of a quadrangular shape having different diameters along the outer shapes of the plurality of types of columns 20 centered on the axial center position of the second insertion portion 40. Therefore, the adapter 30 can be positioned on each of the square columns 20 having different diameters, and the misalignment between the adapter 30 and each column 20 can be easily suppressed.

Next, a modification of the present invention will be described.
FIG. 8 is a perspective view of the adapter 100 according to the modified example of the present invention as viewed from the lower surface side. In FIG. 6, the same parts as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.
The adapter 100 of this modification includes a fixing member 160 instead of the fixing member 60 of the adapter 30 of the above-described embodiment. The fixing member 160 is composed of three expansion / contraction portions 161, and each expansion / contraction portion 161 uses a known screw member. A hexagonal hole 169 is provided in each of the rear end portions 168, which is one end portion of each telescopic portion 161.

Each of the expansion / contraction portions 161 is screwed into three female screw holes 164 provided on the side wall of the second insertion portion 140. The female screw holes 164 are arranged at equal intervals in the circumferential direction of the side wall of the second insertion portion 140. Further, each female screw hole 164 is arranged at the same position in the vertical direction of the second insertion portion 140.
Each expansion / contraction portion 161 is screwed into these female screw holes 164 so that the rear end portion 168 is located on the center side of the second insertion portion 40.

When fixing the adapter 100 to the support column 20, first, the second insertion portion 40 is inserted into the support column 20 from the upper end opening 22, and the adapter 100 and the support column 20 are centered. Each telescopic portion 161 is rotated using a hexagonal wrench. As a result, each expansion / contraction portion 161 moves from the side wall of the second insertion portion 40 toward the inner wall 28 of the support column 20.
Then, the tip portion 165, which is the other end portion of each expansion / contraction portion 161, comes into strong contact after abuting on the inner wall 28, and each expansion / contraction portion 161 moves each tip portion 165 to a position where it cannot rotate.
As described above, in this modification, since each expansion / contraction portion 161 presses the three points of the inner wall 28, the misalignment between the adapter 100 and the support column 20 is further suppressed, and the fixing strength between the adapter 100 and the support column 20 is further secured. It will be easier.

In this modification, in addition to the three female screw holes 164, another female screw hole may be provided. The female screw holes are arranged at the same positions as the female screw holes 164 in the vertical direction of the second insertion portion 140, and face any one of the three female screw holes 164 on the side wall of the second insertion portion 140. It is placed in the position to be.
By screwing the telescopic portion 161 removed from any of the female screw holes 164 into the female screw hole and extending the telescopic portion 161 together with the opposing telescopic portion 161, it is possible to press the facing inner wall region of the inner wall 28 of the support column 20. It becomes.
This makes it easy, for example, to fix the adapter 100 of the present modification to the square support column 20.

The expansion / contraction portion 161 is not limited to the hexagonal hole 169, and may be formed in a shape that allows other tools to be used. Further, a grip portion or the like that can be rotated by an operator by hand may be provided.

Next, another modification of the present invention will be described.
FIG. 9 is a perspective view of the adapter 200 according to another modification of the present invention as viewed from the lower surface side. In FIG. 7, the same parts as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.
The adapter 200 of this modification includes an annular plate portion 235 having a diameter larger than that of the adapter 30, and a pressing metal fitting 267 is provided at the tip of each pressing portion 67 of the fixing member 60.

The annular plate portion 235 is provided with seven types of step portions 250A, 250B, 250C, 250D, 250E, 250F, and 250G that project downward as they go outward in the radial direction of the adapter main body 232.

Each pressing metal fitting 267 has substantially the same shape as the pressing portion 67 and is formed to be larger, and each pressing metal fitting 267 projects to the side of each pressing portion 67 away from the body portion 62. The protruding end of each pressing metal fitting 267 is formed in an uneven shape.

By providing each pressing metal fitting 267 in this way, the length dimension of the fixing member 60 in the longitudinal direction becomes longer.
Then, the adapter 200 arranged at the tip of the support column 20 is fixed to the support column 20 by each pressing metal fitting 267 pressing the inner wall 28.
Therefore, the adapter 200 can be fixed to the support column 20 having a larger inner diameter.

The above-described embodiment illustrates one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

For example, in the above-described embodiment, the plurality of step portions 50 are provided so as to project downward as they go outward in the radial direction of the adapter main body 32. However, the present invention is not limited to this, and each step portion 50 may be formed so as to project downward as it goes inward in the radial direction of the adapter main body 32. In this case, each step portion 50 is inserted into the inside of the support column 20, and the wall surface thereof abuts on the inner wall 28.

Further, for example, the above-mentioned lighting device 1 is said to be used as an approach light, but the present invention is not limited to this, and may be used for a street light or the like provided with columns such as a pole type or an arm type.
Further, for example, in the above-described embodiment, the adapter main body 32 is formed in an annular shape, and the plurality of step portions 50 are formed so as to be concentric with the adapter main body 32 in an annular shape. However, the present invention is not limited to this, and the adapter main body 32 may be formed in a polygonal shape such as a quadrangle in a bottom view, and each step portion 50 may be formed in a polygonal shape similar to the adapter main body 32.

Further, for example, at least a part of the outer peripheral surface of the body portion 62 may be formed in a polygonal shape so that it can be rotated by a tool such as a wrench.

1 Lighting device 10 Lighting equipment 20 Strut 28 Inner wall 30, 100, 200 Adapter 32, 232 Adapter body 33 First insertion part 35, 235 Ring plate part 38, 64, 164 Female screw hole 40, 140 Second insertion part (insertion part)
50, 50A, 50B, 50C, 50D, 50E, 250, 250A, 250B, 250C, 250D, 250E, 250F, 250G Step part (positioning part)
50A1 Bottom surface 50A2 Wall surface 52, 52A, 52B Corner part 60, 160 Fixing member 61, 161 Telescopic part 62 Body part 63 Male screw member 67 Pressing part

Claims (8)

In an adapter that is fixed to a strut to which a luminaire is attached
It has an insertion part to be inserted into the support column.
An adapter characterized in that the insertion portion is provided with a fixing member that extends to press the inner wall of the support column inside the support column and is fixed to the support column. The adapter according to claim 1, wherein the fixing member includes a pair of telescopic portions that expand and contract so as to be pressed against the facing inner wall region of the inner wall from the insertion portion. The fixing member has a body portion that rotates a pair of the telescopic portions so as to be expandable and contractible.
The adapter according to claim 2, wherein the amount of expansion and contraction of the pair of the expansion and contraction portions with respect to the rotation of the body portion is uniform. The adapter according to any one of claims 1 to 3, wherein a plurality of positioning portions capable of positioning at each of the plurality of types of columns having different end shapes are provided. .. The fourth aspect of claim 4, wherein the plurality of positioning portions have a plurality of step portions that form steps along the circumferences of different diameters centered on the axial center position of the insertion portion. adapter. The fifth aspect of claim 5, wherein the plurality of step portions project toward the support column inserted into the insertion portion toward the outer side in the radial direction about the axial center position of the insertion portion. Adapter. The plurality of positioning portions according to claims 4 to 6, wherein the plurality of positioning portions have a plurality of corner portions that form a step along the outer periphery of a different polygonal shape centered on the axial center position of the insertion portion. The adapter described in either. A lighting device comprising the adapter according to any one of claims 1 to 7.

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