WO2016135928A1

WO2016135928A1 - Bushing and light fixture

Info

Publication number: WO2016135928A1
Application number: PCT/JP2015/055663
Authority: WO
Inventors: 正義三浦; 巧小川
Original assignee: 岩崎電気株式会社
Priority date: 2015-02-26
Filing date: 2015-02-26
Publication date: 2016-09-01

Abstract

Provided are a bushing and a light fixture with which it is possible to insert pipes having different outside diameters without the use of a sharp tool. A bushing 40 has an insertion hole 41 through which pipes 5 having different outside diameters can be inserted, wherein a plurality of annular thin parts 44 are provided to positions corresponding to the outside diameters of the pipes 5, and a plurality of insertion holes 41 having different diameters can be formed by tearing off the thin parts 44.

Description

Bush and lighting equipment

The present invention relates to a bush for inserting a pipe and a lighting fixture.

2. Description of the Related Art Conventionally, in lighting fixtures installed outdoors such as road lights, there are lighting fixtures that are used, for example, by installing a column made of a metal pipe on the side of the road and attaching it to the tip of the column. For example, a rubber bush may be attached to the connecting portion between the lighting device and the support column in order to prevent rainwater, insects, and the like from entering the device main body.
The bush is used not only in lighting equipment but also in various places such as a casing wall through which an electric wire passes (see, for example, Patent Document 1).
Also, the bushing pipe mounting part is integrally formed in a multi-stage shape, and the mounting part is cut at a position that matches the outer diameter of the pipe to be inserted, so that one type of bush can accommodate several types of pipe outer diameters. The technique to make is disclosed (for example, refer patent document 2).

Japanese Utility Model Publication No. 49-133200 JP-A-8-153431

However, the bushing for lighting fixtures has only one type of insertion hole for inserting the column, so prepare multiple types of bushes according to the outer diameter of the column to which the lighting fixture is attached and match the outer diameter of the column. It was necessary to select a bush and attach it to a lighting fixture.
In addition, even if a stepped bush that can accommodate pipes with different outer diameters is used as in the conventional configuration described above, it is necessary to cut the mounting portion of the bush to a suitable hole diameter using a cutter or nipper at the site. There is. Since the work of attaching the luminaire to the column is performed at a high place, the work using a sharp tool is not preferable.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the bush and lighting fixture which can insert the pipe from which an outer diameter differs, without using a sharp tool.

In order to achieve the above-described object, the bush of the present invention is a bush having an insertion hole into which a pipe having a different outer diameter can be inserted, and a plurality of annular thin portions are provided at positions corresponding to the outer diameter of the pipe. In addition, it is characterized in that an insertion hole having a different diameter can be formed by cutting a thin portion.

In the above-described configuration, the plurality of insertion holes may be formed so that one point on the circumference substantially matches.

In the above-described configuration, a cutout portion serving as a starting point of breakage may be formed in each of the thin portions.

In the above-described configuration, the notch portion may be formed on the opposite side to the one point with respect to the center of the thin portion.

In the above-described configuration, the plurality of insertion holes may be formed in multiple stages.

Further, the present invention provides a lighting fixture in which a lamp body is supported by a pipe, the bush including an insertion hole into which a pipe having a different outer diameter can be inserted, and the bush is annular at a position corresponding to the outer diameter of the pipe. It is characterized in that a plurality of thin wall portions are provided and the thin wall portions are cut so that insertion holes having different diameters can be formed.

According to the present invention, the bush is provided with a plurality of annular thin portions at positions corresponding to the outer diameter of the pipe, and a plurality of insertion holes having different diameters can be formed by cutting the thin portions. Pipes with different outer diameters can be inserted without using a tool.

FIG. 1 is a perspective view showing a road lamp according to a first embodiment of the present invention. 2A and 2B are diagrams illustrating a lighting fixture, where FIG. 2A is a plan view, FIG. 2B is a side view, FIG. 2C is a bottom view, FIG. 2D is a front view, and FIG. FIG. 3 is a bottom view showing the lighting apparatus with the lower cover body removed. 4 is a cross-sectional view taken along the line IV-IV in FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a perspective view showing the bush. 7A and 7B are diagrams showing the bush, in which FIG. 7A is a plan view, FIG. 7B is a front view, FIG. 7C is a side view, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. FIG. 9 is an enlarged view of a portion A in FIG. FIG. 10 is a perspective view showing a bush according to the second embodiment of the present invention. 11A and 11B are diagrams showing a bush, in which FIG. 11A is a plan view, FIG. 11B is a front view, FIG. 11C is a side view, and FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. FIG. 13 is an enlarged view of a portion B in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a road lamp will be described as an example of a lighting fixture.
<First Embodiment>
FIG. 1 is a perspective view showing a road lamp according to the first embodiment. 2A and 2B are views showing a road light. FIG. 2A is a plan view, FIG. 2B is a side view, FIG. 2C is a bottom view, FIG. 2D is a front view, and FIG. (E) is a rear view. FIG. 3 is a bottom view showing the road lamp with the lower cover body removed. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 3 is a sectional view taken along line VV in FIG.
As shown in FIG. 1, the road lamp 1 includes an instrument body 10 that is supported by a distal end portion 3 of an arm-type column (pipe) 5. The column 5 is a column erected on the roadside ground such as a road shoulder, and the column 5 is bent from the middle of the column and the tip 3 extends horizontally or inclined at a predetermined angle with respect to the horizontal direction. Yes.

The appliance body 10 is formed of a material (for example, aluminum or aluminum alloy) that has sufficient corrosion resistance to withstand outdoor use and has high thermal conductivity. As shown in FIGS. 1 and 2, the instrument main body 10 has a long rectangular box shape in plan view from one end 11A to the other end 11B, and is supported by the tip 3 of the column 5 in the vicinity of the one end 11A. The other end 11B is installed with the road side (the roadway side) facing.

The instrument body 10 includes a base case body 20 and a lower cover body 21, which constitute a substantially box-shaped case body of the instrument body 10. As shown in FIG. 3, the base case body 20 is formed in a box shape having an open lower surface, and the inside thereof is a clamp mounting chamber 27 B on the one end 11 A side of the instrument body 10 and a light source chamber 27 A on the other end 11 B side. And are partitioned by a partition 28. A clamp unit 26 is disposed in the clamp mounting chamber 27B, and a light source (not shown) (for example, a light emitting element such as an LED) is disposed in the light source chamber 27A.

The light source chamber 27 A is covered with a flat plate-like transparent globe 13, the clamp mounting chamber 27 B is covered with a flat plate-like lower cover body 21, and the globe 13 and the lower cover body 21 are fastened to the lower surface of the base case body 20. (For example, screws). Each of the globe 13 and the lower cover body 21 is provided with an annular packing (not shown) as a seal member on the entire circumference. When the globe 13 and the lower cover body 21 are attached to the base case body 20, the packing is sandwiched between the globe 13 and the base case body 20 and between the lower cover body 21 and the base case body 20. Thus, the inside of the base case body 20 is sealed.

The base case body 20 includes a top surface 10C, a back surface 10B (an outer surface in the vicinity of the one end 11A), a front surface 10D (an outer surface in the vicinity of the other end 11B), and left and right outer surfaces among the six outer surfaces of the instrument body 10. 10E and 10F are comprised, and the lower cover body 21 comprises the bottom face 10A of the instrument main body 10. FIG.
The instrument body 10 is provided with a shorting cap 7 that can be connected to an automatic lighting device (not shown) that receives light and automatically turns on a light source (not shown). Is mounted in the lighting device mounting opening 12 formed on the top surface 10C.

An arm insertion hole 15 for inserting the support column 5 is provided on the back surface 10B. When the instrument body 10 is attached to the column 5, the tip 3 of the column 5 is inserted into the arm insertion hole 15 from the back surface 10 B of the instrument body 10 and fixed to the base case body 20 by the clamp unit 26.
In the present embodiment, the clamp unit 26 includes a bracket 26A that holds the tip 3 of the column 5 from below, and a fixture 26B (bolts in this embodiment) that fixes the bracket 26A to the base case body 20. Has been. In addition, the fixing means to the instrument main body 10 of the support | pillar 5 is not limited to this structure.

The instrument body 10 is configured so that the mounting angle in the vertical direction of the column 5 can be adjusted in multiple stages. Specifically, the base case body 20 has a ceiling surface 20A that constitutes the ceiling of the clamp mounting chamber 27B, and support bodies 30 that are in contact with and support the upper surface of the column 5 are provided on the ceiling surface 20A at predetermined intervals. It has been. The plurality of supports 30 are formed in a step shape by increasing the amount of protrusion downward from the ceiling surface 20A from the back surface 10B to the front surface 10D. By bringing the upper surface of the support column 5 into contact with any one of the supports 30, the vertical mounting angle of the support column 5 can be adjusted in multiple stages. By adjusting the attachment angle of the column 5 in multiple stages, the vertical inclination angle of the instrument body 10 can be adjusted in multiple stages.

Further, as shown in FIGS. 4 and 5, a bush 40 for sealing the arm insertion hole 15 is fitted into the arm insertion hole 15, and the support column 5 is inserted into the insertion hole 41 of the bush 40. Hereinafter, the bush 40 will be described in detail.

FIG. 6 is a perspective view showing the bush 40. 7 is a view showing the bush 40, FIG. 7A is a plan view, FIG. 7B is a front view, FIG. 7C is a side view, and FIG. 7D is a bottom view. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7, and FIG. 9 is an enlarged view of a portion A in FIG.
The bush 40 is a packing formed using an elastic material such as rubber, for example, and is formed in an annular shape as shown in FIG. A fitting groove 42 to be fitted into the arm insertion hole 15 is formed on the outer peripheral surface of the bush 40 in the circumferential direction. By fitting the fitting groove 42 into the arm insertion hole 15, one end 40A (axially inner side) of the bush 40 is positioned inside the instrument body 10, and the other end 40B (axially inner side) of the bush 40 is instrument body. 10 outside.

As shown in FIG. 7, the bush 40 includes a planar attachment portion 43 for attaching the support column 5 on the other end 40 B side, and an insertion hole 41 A for inserting the support column 5 is formed in the attachment portion 43. The diameter D1 of the insertion hole 41A is set according to the support column 5 having the smallest outer diameter among the assumed outer diameters. The insertion hole 41 A is eccentrically provided on the upper side of the instrument body 10 with respect to the center of the bush 40.

In addition, a plurality of annular thin portions 44 (three in the present embodiment) are formed around the insertion hole 41 A in the attachment portion 43. The plurality of thin portions 44 are formed in the number corresponding to the assumed outer diameter of the column 5, and the diameters of the plurality of thin portions 44 are set to a diameter corresponding to the assumed outer diameter of the column 5. The plurality of thin-walled portions 44 are formed so that the uppermost point P1 on the circumference substantially coincides with each other and does not contact each other. In order to make the plurality of thin portions 44 approach one point P1, the width of each thin portion 44 is formed so as to be thinner toward the top. By cutting any of the thin portions 44, insertion holes 41B to 41D are formed.
Here, it is assumed that the insertion holes 41 formed by the thin-walled portion 44 are denoted by 41B to 41D in ascending order of diameter. In this embodiment, the diameters D1 to D4 of the four insertion holes 41A to 41D are set to 27 mm, 35.7 mm, 40.8 mm, and 51.4 mm, respectively. The size is not limited to this.

As shown in FIGS. 8 and 9, the attachment portion 43 is provided with thick portions 45 that are thicker than the thin portions 44, alternately with the thin portions 44. In the present embodiment, the thin portion 44 is disposed outside the center M in the thickness direction of the thick portion 45.
The thin portion 44 is formed to a thickness that can be cut off, and the thick portion 45 is formed to a thickness that does not cause damage when the thin portion 44 is cut. Here, the ease of tearing of the thin portion 44 is caused by the difference between the thickness of the thin portion 44 and the thickness of the thin portion 44 and the thick portion 45. In this embodiment, although the thickness of the thin part 44 and the thick part 45 is each set to 0.5 mm and 2 mm, it is not limited to this.

Each thin portion 44 is formed with at least one notch 46 (in this embodiment, one). The cutout portion 46 is a through portion that becomes a starting point when the thin portion 44 is to be cut, and in this embodiment, the cutout portion 46 is formed as a round hole, and the diameter of the round hole functions as a starting point of fracture. In addition, the surface tension of water is set at about 1.5 mm. Note that the shape, size, and number of the notches 46 are not limited to this, and may be formed as triangular holes, square holes, or cut lines, for example.
The cutout portion 46 is provided at the lowermost portion of the thin portion 44 on the opposite side to the one point P1 in the circumferential direction.

As shown in FIGS. 4 and 5, a positioning member 29 is integrally formed on the inner surface of the back surface 10 B at a position below the arm insertion hole 15. A positioning groove 47 is formed on the outer end surface of the bush 40 on the one end 40 A side at a position and shape corresponding to the positioning member 29. In the present embodiment, the positioning member 29 is formed as two prismatic protrusions, and the positioning groove 47 is provided for each positioning member 29 and is formed into a rectangular groove so that the positioning member 29 can be inserted. When the bush 40 is fitted into the arm insertion hole 15, the positioning member 29 is inserted into the positioning groove 47 and the bush 40 is positioned in the circumferential direction. By providing the positioning member 29 and the positioning groove 47, the angular deviation in the circumferential direction of the bush 40 can be prevented, and the sealing performance between the arm insertion hole 15 and the support column 5 can be secured.
Note that the position, number, and shape of the positioning member 29 and the positioning groove 47 are not limited thereto.

In the present embodiment, since the road lamp 1 is configured to be able to adjust the mounting angle in the vertical direction of the column 5, the arm insertion hole 15 is arranged so that the mounting range of the column 5 can be secured. It is formed in a long round shape in the direction. Similarly to the arm insertion hole 15, the bush 40 is also formed in an oval shape that is long in the vertical direction of the instrument body 10. By forming the bush 40 in the shape of an elongated circle, the rotation of the bush 40 can be suppressed, so that the point P1 reliably contacts the upper surface of the column 5 and the sealing property between the arm insertion hole 15 and the column 5 is improved. There is also an effect that it can be secured.
Further, a groove-shaped reduced diameter portion 48 is formed in the circumferential direction on the other end 40B side of the outer peripheral surface of the bush 40. Since the attachment portion 43 can be inclined with respect to the axial direction by providing the reduced diameter portion 48, the attachment portion of the bush 40 follows the attachment angle of the support column 5 even if the attachment angle of the support column 5 is adjusted. 43 can move, and the sealing performance between the arm insertion hole 15 and the support column 5 can be secured.

Next, the procedure for attaching the instrument main body 10 to the column 5 and the operation of the bush 40 will be described.
The road lamp 1 is shipped with the bush 40 fitted into the arm insertion hole 15. The work of attaching the road light 1 to the column 5 is work in the vicinity of the tip 3 of, for example, 5 to 8 m from the ground, that is, at a high place.
The operator confirms the outer diameter of the tip portion 3 of the support column 5 at a high place, and cuts the thin portion 44 at a position matching the outer diameter. At this time, since the thin portion 44 is formed to a thickness that can be cut off, the thin portion 44 can be easily cut off without using a sharp tool such as a nipper or a cutter. The insertion hole 41 corresponding to the outer diameter of the column 5 can be easily formed.
When a plurality of types of bushes are prepared in accordance with the outer diameter of the support 5, the management of the parts and the selection of the parts become complicated, but in this embodiment, the support 5 having several types of outer diameters is formed with one type of bush. Since it is possible to cope with it, the number of parts can be reduced, and management and selection of plural kinds of parts can be omitted. Moreover, in this embodiment, since it is not necessary to bring a sharp tool for cutting the bush 40 to a high place, it is safe and easy to attach the road light 1 at the site (high place).

In addition, if the hole diameter of the bush 40 is matched with the outer diameter of the column 5 first, the cutting work of the bush 40 at a high place becomes unnecessary. However, if the outer diameter of the column 5 does not match the hole diameter of the bush 40 and the hole diameter of the bush 40 is too large, the road lamp 1 is lowered to the ground once again and a new bush 40 is attached to the road lamp 1. Work is required.

The bush 40 includes a thin portion 44 having a thickness that can be cut off, and a thick portion 45 that is thicker than the thin portion 44. Due to the difference in thickness between the thin wall portion 44 and the thick wall portion 45, the thin wall portion 44 can be easily cut off without cutting off portions other than the thin wall portion 44 that needs to be broken.
Further, since the notched portion 46 is formed in the thin portion 44, the thin portion 44 is not easily cut off, or a portion other than the thin portion 44 that needs to be broken is cut off forcibly. Can be prevented. Moreover, since the notch part 46 was formed as a hole, the notch part 46 can be made visible more easily than the case where it forms as a cut | interruption. Furthermore, by forming the notch 46 in the shape of a hole, for example, a driver or the like used for the work of attaching the road lamp 1 can be inserted into the notch 46, so that the thin portion 44 can be easily started to break.

When a plurality of insertion holes are formed concentrically, in order to support the columns 5 having different outer diameters, for example, it is necessary to support the columns 5 by arranging a pair of clamp units on the upper and lower sides of the column 5.
On the other hand, in the present embodiment, since the plurality of insertion holes 41 are formed so that one point P1 on the circumference substantially coincides, the column 5 having a different outer diameter can be formed without changing the position of the upper surface of the column 5. For example, the column 5 can be supported by one clamp unit 26.
The plurality of thin portions 44 cannot be formed by completely matching one point P1 in order to prevent breakage of portions other than the thin portions 44 that need to be broken. Deviation δ occurs. However, since the bush 40 is formed of an elastic material such as rubber, when the support column 5 is inserted into the insertion hole 41, the insertion hole 41 is deformed by the elasticity of the material, and this deviation δ is eliminated.

The notch portion 46 is disposed on the opposite side to the point P1 with respect to the center of the thin portion 44, that is, at a portion where the plurality of thin portions 44 are separated from the position of the single point P1, and thus the thin portion 44 that breaks. It can suppress that the thin part 44 adjacent to breaks.
Since the notch 46 is provided at the lowermost part of the thin portion 44, the notch 46 is positioned below the support column 5, so that foreign matter can be prevented from entering the notch 46. Further, in the present embodiment, since the width of each thin portion 44 is formed so as to become thicker at the lowermost portion, the notch portion 46 can be designed at the lowermost portion by providing the cutout portion 46 at the lowermost portion. The degree can be improved.

As described above, according to the present embodiment, the bush 40 is a bush having the insertion hole 41 into which the support column 5 having a different outer diameter can be inserted, and has an annular thin wall at a position corresponding to the outer diameter of the support column 5. A plurality of insertion holes 41 having different diameters can be formed by providing the portion 44 and cutting the thin portion 44 into pieces. With this configuration, it is possible to insert the column 5 having a different outer diameter without using a sharp tool.

Further, according to the present embodiment, the plurality of insertion holes 41 are formed so that the circumferential point P1 substantially coincides. Even if the outer diameter of the support | pillar 5 differs by this structure, since the fixing position to the instrument main body 10 of the support | pillar 5 can be made substantially the same, the fixing structure of the support | pillar 5 can be simplified.

Moreover, according to this embodiment, since it was set as the structure which forms the notch part 46 used as the starting point of a fracture | rupture in each thin part 44, while being able to cut the thin part 44 more easily, a fracture | rupture is required. Breakage of portions other than the thin portion 44 can be suppressed.

Further, according to the present embodiment, the notch 46 is formed on the opposite side of the point P1 with respect to the center of the thin portion 44. With this configuration, it is possible to arrange the notched portion 46 that applies a force to a portion where the plurality of thin portions 44 are relatively separated from each other, and therefore, it is possible to suppress breaking of the thin portions 44 other than the thin portion 44 that requires breaking. .

Second Embodiment
In the first embodiment, the mounting portion 43 of the bush 40 is formed in a planar shape, but in the second embodiment, the mounting portion 143 of the bush 140 is formed in a step shape. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
FIG. 10 is a perspective view showing a bush 140 according to a modification. 11A and 11B are views showing the bush 140. FIG. 11A is a plan view, FIG. 11B is a front view, FIG. 11C is a side view, and FIG. 11D is a bottom view. 12 is a cross-sectional view taken along the line XII-XII of FIG. 11, and FIG. 13 is an enlarged view of a portion B of FIG.
The bush 140 is a packing formed using an elastic material such as rubber, for example, and is formed in an oval shape as shown in FIGS. 10 to 13. A fitting groove 42 to be fitted into the arm insertion hole 15 is formed on one end 40A side of the outer peripheral surface of the bush 140, and a reduced diameter portion 48 is formed on the other end 40B side of the outer peripheral surface of the bush 140 in the circumferential direction. ing. A positioning groove 47 is formed on the outer end surface of the bush 40 on the one end 40 A side at a position and shape corresponding to the positioning member 29.

In the bush 140, the thin wall portion 144 protrudes outward in the axial direction of the bush 140 to form a side wall portion, and the thin wall portion 144 and the thick wall portion 145 extending in a planar shape in the radial direction of the bush 140 are alternately arranged. The mounting portion 143 is formed in a step shape.
An insertion hole 141A for inserting the column 5 is formed in the mounting portion 143, and the diameter E1 of the insertion hole 141A is set according to the column 5 having the smallest outer diameter among the assumed outer diameters. The insertion hole 141 A is eccentrically provided on the upper side of the instrument body 10 with respect to the center of the bush 140.

The plurality of thin wall portions 144 are formed by the number of outer diameters of the assumed support columns 5, and the diameters of the plurality of thin wall portions 144 are set to a diameter corresponding to the assumed outer diameter of the support columns 5. The plurality of thin portions 44 are formed so that the uppermost point P2 on the circumference coincides. In the present embodiment, the width of the thin portion 44 is the same in the circumferential direction. By cutting any of the thin portions 144, insertion holes 141B to 141D are formed.
Here, it is assumed that 141B to 141D are attached to the insertion hole 141 formed by the thin portion 144 in order of decreasing diameter. In this embodiment, the diameters E1 to E4 of the four insertion holes 141A to 141D are set to 32 mm, 42 mm, 48 mm, and 60.5 mm, respectively. However, the number and size of the insertion holes 141A to 141D are the same. It is not limited to.
The thicknesses of the thin portion 144 and the thick portion 145 are set to 0.5 mm and 2 mm, respectively, as in the first embodiment, but are not limited thereto.

Each thin-walled portion 144 is formed with at least one cutout portion 46 (one in the present embodiment) serving as a starting point of breakage, and this cutout portion 146 is one point with respect to the center of the thin-walled portion 144. It is on the opposite side to P2 and is provided at the lowermost portion of the thin portion 144.

Thus, according to the present embodiment, the same effects as in the first embodiment can be obtained. In the present embodiment, a plurality of insertion holes 141 are formed in multiple stages. With this configuration, since the plurality of insertion holes 141 can be made to coincide with each other at one point P2, even if the outer diameter of the column 5 is different, the insertion hole 141 can be more accurately matched with the position of the column 5, The sealing property between the insertion hole 15 and the column 5 can be further ensured.

However, the above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the

bushes

40 and 140 are formed in an oval shape, but the shape of the

bushes

40 and 140 is not limited to this. For example, the

bushes

40 and 140 may be formed in a circular shape as long as the mounting angle of the column 5 is not adjusted.

In the above-described embodiment, the insertion holes 41 and 141 are eccentric with respect to the centers of the

bushes

40 and 140. However, the insertion holes 41 and 141 may be disposed at the centers of the

bushes

40 and 140. In this case, what is necessary is just to change the attachment position with respect to the instrument main body 10 of the support | pillar 5 according to the outer diameter of the support | pillar 5. FIG.

In the above-described embodiment, the instrument main body 10 is attached to the arm-type support column 5. However, the instrument main body 10 is attached to a pole-type support column (also referred to as a straight type) in which the distal end portion 3 extends straight in the vertical direction. Also good. In this case, a pole insertion hole for inserting a pole-shaped support may be formed on the bottom surface 10A near the one end 11A, for example. Further, the road lamp 1 may be configured to be attachable to both the arm-type column 5 and the pole-type column.

In the above-described embodiment, the light source is described as a light emitting element such as an LED, but the light source is not limited to the light emitting element, and various light sources such as a lamp can be used.

Moreover, in the above-mentioned embodiment, although the lighting fixture was demonstrated as the road light 1, if a lighting fixture is not only a road light but a lighting fixture with which a fixture main body is supported by the front-end | tip part of a support | pillar, for example, a street light etc. Applicable to any lighting fixture.
Moreover, the

bushes

40 and 140 of the present invention are applicable not only to lighting equipment but also to various devices.

1 road lights (lighting fixtures)
5 Prop (pipe)
10 Lamp body 40,140 Bushing 41,141 Insertion hole 44,144 Thin part 46 Notch P1, P2 One point

Claims

A bush having an insertion hole into which pipes having different outer diameters can be inserted,
A bush characterized in that a plurality of annular thin portions are provided at positions corresponding to the outer diameter of the pipe, and an insertion hole having a different diameter can be formed by cutting the thin portion.
The bush according to claim 1, wherein the plurality of insertion holes are formed so that one point on the circumference substantially coincides.
The bush according to claim 1 or 2, wherein a cutout portion serving as a starting point of breakage is formed in each of the thin-walled portions.
The bush according to claim 3, wherein the notch is formed on the opposite side to the one point with respect to the center of the thin portion.
The bush according to any one of claims 1 to 4, wherein a plurality of the insertion holes are formed in multiple stages.
In the lighting fixture that supported the lamp body on the pipe,
A bush having an insertion hole into which pipes having different outer diameters can be inserted,
A lighting apparatus comprising: a plurality of annular thin portions provided at positions corresponding to the outer diameter of the pipe, and the thin portions being cut to form insertion holes having different diameters.