JP6437868B2

JP6437868B2 - Lamp

Info

Publication number: JP6437868B2
Application number: JP2015074996A
Authority: JP
Inventors: 啓太服部; 渡辺　将史; 将史渡辺
Original assignee: Koito Electric IndustriesLtd
Current assignee: Koito Electric IndustriesLtd
Priority date: 2015-04-01
Filing date: 2015-04-01
Publication date: 2018-12-12
Anticipated expiration: 2035-04-01
Also published as: JP2016195072A

Description

本発明は、例えば地面に埋設される埋込型標識灯として使用される灯器に関する。 The present invention relates to a lamp used as, for example, an embedded marker lamp embedded in the ground.

空港の滑走路や誘導路、ヘリポート、人や車両等が通行する道路等に埋設され、運転手や歩行者の視線誘導を行う埋込型標識灯が広く知られている。埋込型標識灯は、典型的には、その上面が地面（地表面）から突出するように設置され、水平全周方向に規定光度以上の照明光が出射されるように構成される。 There are widely known embedded beacon lights that are embedded in airport runways, taxiways, heliports, roads where people and vehicles pass, and the like, and guide drivers and pedestrians. The embedded marker lamp is typically installed such that its upper surface protrudes from the ground (the ground surface), and is configured to emit illumination light having a specified luminous intensity or more in the entire horizontal direction.

埋込型標識灯の光源には、特許文献１に記載のように、ハロゲンランプ等の電球光源が広く用いられている。一方、近年においては、メンテナンス性や省電力化、薄型化等を図る目的で、光源にＬＥＤ（Light Emitting Diode）素子を用いた埋込型標識灯の開発が進められている。 As a light source for an embedded marker lamp, a light source such as a halogen lamp is widely used as described in Patent Document 1. On the other hand, in recent years, for the purpose of achieving maintainability, power saving, thinning, and the like, development of an embedded beacon lamp using an LED (Light Emitting Diode) element as a light source has been advanced.

例えば特許文献２には、発光ダイオードが表面に搭載された下部灯体と、縦断面が略５角形状の略柱状に形成され下部に発光ダイオードを収容する略円柱状の凹部を有するレンズと、下部灯体の上に配置され略円錐状のレンズの上部が上方へ突出するように挿通される挿通孔を有する上部灯体とを備え、レンズの凹部から入射した発光ダイオードの放射光を略円錐状のレンズの上部から出射させるように構成された埋込型標識灯が開示されている。 For example, in Patent Document 2, a lower lamp body in which a light emitting diode is mounted on the surface, a lens having a substantially cylindrical concave portion that is formed in a substantially columnar shape having a substantially pentagonal longitudinal section and accommodates the light emitting diode in the lower portion, An upper lamp body having an insertion hole which is disposed on the lower lamp body and is inserted so that the upper portion of the substantially conical lens protrudes upward, and the emitted light of the light emitting diode incident from the concave portion of the lens is substantially conical. There is disclosed an embedded beacon lamp configured to emit light from the top of a lens.

特開平５−２８００１７号公報JP-A-5-280017 特開２００７−１０７３３１号公報JP 2007-107331 A

埋込型標識灯は、その投光部が地面から露出するように設置されるため、航空機やヘリコプター等の大きな重量物に踏まれても耐えられる構造が要求される。しかしながら、特許文献２に記載の構造では、重量物が乗り上げたときに生じる荷重がレンズに直接的に加わるため、レンズが破損するおそれがある。 Since the embedded marker lamp is installed so that the light projecting portion is exposed from the ground, a structure that can withstand even a heavy object such as an aircraft or a helicopter is required. However, in the structure described in Patent Document 2, since a load generated when a heavy object rides on is directly applied to the lens, the lens may be damaged.

以上のような事情に鑑み、本発明の目的は、重量物に対する耐久性を向上させることができる埋込型標識灯に用いて好適な灯器を提供することにある。 In view of the circumstances as described above, an object of the present invention is to provide a lamp suitable for use in an embedded marker lamp that can improve durability against heavy objects.

上記目的を達成するため、本発明の一形態に係る灯器は、第１の灯体と、第２の灯体と、複数の点光源と、レンズ部材とを具備する。
上記第１の灯体は、主面と、凹部とを有する。上記凹部は、上記主面に設けられ、第１の深さの第１の底面を有する。
上記第２の灯体は、上記第１の底面に対向する天板部と、上記天板部から上記第１の底面に向かって突出する柱体部とを有する。上記柱体部の先端は、上記第１の底面に固定される。
上記複数の点光源は、上記柱体部の周囲に環状に配置され、上記第１の底面から上記天板部に向かって照明光を出射する。
上記レンズ部材は、レンズ本体と、環状の光入射部と、環状の光出射部とを有する。上記レンズ本体は、透光性材料で構成され、上記柱体部が貫通する開口部を有する。上記環状の光入射部は、上記レンズ本体の一端部に設けられ、上記複数の点光源と対向する。上記環状の光出射部は、上記レンズ本体の他端部の外周縁部に設けられ、上記照明光を出射する。上記レンズ部材は、上記第１の底面と上記天板部との間に配置される。 In order to achieve the above object, a lamp according to an embodiment of the present invention includes a first lamp, a second lamp, a plurality of point light sources, and a lens member.
The first lamp body has a main surface and a recess. The concave portion is provided on the main surface and has a first bottom surface having a first depth.
The second lamp body includes a top plate portion facing the first bottom surface, and a column body portion projecting from the top plate portion toward the first bottom surface. The front end of the column body is fixed to the first bottom surface.
The plurality of point light sources are annularly arranged around the column body portion, and emit illumination light from the first bottom surface toward the top plate portion.
The lens member includes a lens body, an annular light incident portion, and an annular light emitting portion. The lens body is made of a translucent material and has an opening through which the column body portion passes. The annular light incident portion is provided at one end of the lens body and faces the plurality of point light sources. The annular light emitting portion is provided at the outer peripheral edge of the other end of the lens body and emits the illumination light. The lens member is disposed between the first bottom surface and the top plate portion.

上記灯器において、レンズ部材は、第１の灯体の凹部に収容されるとともに、上記凹部の第１の底面と第２の灯体の天板部との間に配置される。環状に配置された複数の点光源から出射された照明光は、同じく環状に形成された光入射部を介してレンズ部材の内部へ入射し、光出射部から水平方向及び上方に向けて出射される。 In the lamp, the lens member is housed in the concave portion of the first lamp body, and is disposed between the first bottom surface of the concave portion and the top plate portion of the second lamp body. Illumination light emitted from a plurality of point light sources arranged in an annular shape is incident on the inside of the lens member through a light incident portion that is also formed in an annular shape, and is emitted horizontally and upward from the light emitting portion. The

一方、第２の灯体は、上記天板部から上記第１の底面に向かって突出し先端が第１の底面に固定される柱体部を有しているため、第２の灯体に乗り上げた重量物の荷重は、柱体部を介して第１の灯体に加わることになる。このように上記柱体部を介して荷重を第１の灯体に逃がし、力を分散させることができるため、耐荷重強度を高めることができる。これにより、重量物に対する耐久性の向上を図ることが可能となる。また、レンズ部材に上記荷重が加わることが回避されるため、レンズ部材の破損が防止される。さらに、レンズ部材に高価な高強度材料を用いる必要がなくなるため、コストの低下を図ることができる。 On the other hand, the second lamp body has a column body portion that protrudes from the top plate portion toward the first bottom surface and whose tip is fixed to the first bottom surface, so that it rides on the second lamp body. The heavy load is applied to the first lamp body through the column body. In this way, the load can be released to the first lamp body via the column body portion and the force can be dispersed, so that the load bearing strength can be increased. Thereby, it becomes possible to improve the durability against heavy objects. Moreover, since it is avoided that the said load is added to a lens member, damage to a lens member is prevented. Furthermore, since it is not necessary to use an expensive high-strength material for the lens member, the cost can be reduced.

上記凹部は環状の第２の底面を、上記第２の灯体は環状の板部と複数の連結部とを、それぞれさらに有してもよい。
上記第２の底面は、上記第１の底面の周囲に設けられ、上記第１の深さよりも小さい第２の深さを有する。
上記環状板部は、上記天板部の周囲に配置され、上記第２の底面に支持される。上記複数の連結部は、上記天板部と上記環状板部との間を相互に連結する、
これにより、第２の灯体に作用した荷重を第１の灯体へ効率よく逃がすことができるため、レンズ部材を破損から保護しつつ、重量物に対する耐久性をより向上させることが可能となる。また、複数の連結部の間から光出射部を外部へ露出させることができるため、光出射部の投光部としての機能が確保される。 The concave portion may further include an annular second bottom surface, and the second lamp body may further include an annular plate portion and a plurality of connecting portions.
The second bottom surface is provided around the first bottom surface and has a second depth smaller than the first depth.
The annular plate portion is disposed around the top plate portion and supported by the second bottom surface. The plurality of connecting portions connect the top plate portion and the annular plate portion to each other.
Thereby, since the load which acted on the 2nd lamp body can be efficiently escaped to the 1st lamp body, it becomes possible to improve the durability with respect to a heavy article, protecting a lens member from damage. . Further, since the light emitting part can be exposed to the outside from between the plurality of connecting parts, the function of the light emitting part as the light projecting part is ensured.

上記第２の灯体は、上記第１の深さと同等以上の大きさの高さを有し、上記環状板部は、上記第２の深さと同一の大きさの厚みを有してもよい。
これにより、上記主面が地面と同一平面となるように配置されたとき、地面からの天板部の突出量を小さくすることができる。 The second lamp body may have a height that is equal to or greater than the first depth, and the annular plate portion may have a thickness that is the same as the second depth. .
Thereby, when it arrange | positions so that the said main surface may become the same plane as the ground, the protrusion amount of the top-plate part from the ground can be made small.

上記灯器は、上記天板部と上記レンズ本体との間に配置された弾性部材をさらに具備してもよい。
これにより、天板部に加わる衝撃からレンズ部材を保護することが可能となる。 The lamp may further include an elastic member disposed between the top plate portion and the lens body.
Thereby, it becomes possible to protect a lens member from the impact added to a top-plate part.

上記光入射部は、典型的には、上記レンズ本体の上記一端部に設けられ上記複数の点光源を収容する環状の溝部で構成される。
これにより、光出射部に向けて必要光度の照明光を効率よく導くことができる。上記点光源は、典型的には、ＬＥＤ素子等の半導体発光素子で構成される。 The light incident portion is typically configured by an annular groove portion provided at the one end portion of the lens body and accommodating the plurality of point light sources.
Thereby, the illumination light of a required light intensity can be efficiently guide | induced toward a light-projection part. The point light source is typically composed of a semiconductor light emitting element such as an LED element.

この場合、上記溝部の断面は、半円形状に形成され、上記複数の点光源は、上記半円の中心部に配置されてもよい。
これにより、各点光源から放射される照明光を効率よくレンズ本体の内部に入射させることができるため、光利用効率を高めることが可能となる。 In this case, the cross section of the groove may be formed in a semicircular shape, and the plurality of point light sources may be disposed at the center of the semicircle.
As a result, the illumination light emitted from each point light source can be efficiently incident on the inside of the lens body, so that the light utilization efficiency can be increased.

上記レンズ本体は、上記一端部から上記他端部に向かうに従って外径及び内径がそれぞれ大きくなる外周面及び内周面を有する環状体で構成されてもよい。
光入射部から入射した光は、上記外周面及び内周面で全反射し、かつ、レンズ本体の内部で周方向に均一化されながら光出射部へ導かれる。これにより、レンズ部材の薄型化を実現しつつ、目的とする光度の照明光を全周方向に照射することが可能となる。 The lens body may be formed of an annular body having an outer peripheral surface and an inner peripheral surface, the outer diameter and inner diameter of which increase from the one end to the other end.
The light incident from the light incident portion is totally reflected on the outer peripheral surface and the inner peripheral surface, and is guided to the light emitting portion while being uniformed in the circumferential direction inside the lens body. Accordingly, it is possible to irradiate illumination light having a target light intensity in the entire circumferential direction while realizing a thin lens member.

この場合、上記レンズ本体の上記外周面は、径外方へ凸なる形状の第１の曲面で形成され、上記レンズ本体の上記内周面は、径内方へ凸なる形状の第２の曲面で形成されてもよい。これにより光入射部と光出射部との間の相対位置に依存しない効率的な光学設計が可能となり、設計自由度の向上を図れるようになる。 In this case, the outer peripheral surface of the lens body is formed as a first curved surface having a shape that protrudes radially outward, and the inner peripheral surface of the lens body has a second curved surface that has a shape protruding radially inward. May be formed. As a result, an efficient optical design that does not depend on the relative position between the light incident part and the light emitting part becomes possible, and the degree of freedom in design can be improved.

上記光出射部の形状は特に限定されず、例えば、上記レンズ本体の上記他端部の外周縁部に設けられた環状の平面部と、上記環状の平面部の内周縁部から立上り形成された環状の壁部とを有していてもよい。
これにより、天板部の周囲への光出射部の突出が抑えられるため、光出射部に外力が直接的に加わることを効果的に阻止することができる。 The shape of the light emitting portion is not particularly limited. For example, the light emitting portion is formed so as to rise from an annular flat surface portion provided at the outer peripheral edge portion of the other end portion of the lens body and an inner peripheral edge portion of the annular flat surface portion. You may have an annular wall part.
Thereby, since protrusion of the light emission part to the circumference | surroundings of a top-plate part is suppressed, it can prevent effectively that external force is directly added to a light emission part.

上記灯器は、上記柱体部の外周部に装着され上記レンズ部材の上記開口部に密着する弾性リングをさらに具備してもよい。
これにより柱体部によるレンズ部材の位置決めが容易となり、組立性の向上を図ることが可能となる。 The lamp may further include an elastic ring that is attached to the outer peripheral portion of the column body and is in close contact with the opening of the lens member.
As a result, the lens member can be easily positioned by the column body, and the assemblability can be improved.

以上のように、本発明の灯器によれば、重量物に対する耐久性を向上させることが可能となる。 As described above, according to the lamp of the present invention, durability against heavy objects can be improved.

本発明の一実施形態に係る灯器を示す斜視図である。It is a perspective view which shows the lamp device which concerns on one Embodiment of this invention. 上記灯器の平面図である。It is a top view of the said lamp. 上記灯器の上面側から見た分解斜視図である。It is the disassembled perspective view seen from the upper surface side of the said lamp. 上記灯器の底面側から見た分解斜視図である。It is the disassembled perspective view seen from the bottom face side of the said lamp. 図２におけるＡ−Ａ線概略断面図である。It is an AA line schematic sectional drawing in FIG. 上記灯器におけるレンズ部材の斜視図である。It is a perspective view of the lens member in the said lamp. 上記レンズ部材の正面図である。It is a front view of the lens member. 上記レンズ部材の平面図である。It is a top view of the said lens member. 上記レンズ部材の底面図である。It is a bottom view of the lens member. 上記レンズ部材を透過する照明光の光線追跡図である。It is a ray tracing figure of the illumination light which permeate | transmits the said lens member. 上記灯器の断面方向の配光分布特性を示す一実験結果である。It is one experimental result which shows the light distribution characteristic of the cross-sectional direction of the said lamp. 上記灯器の全周方向の平均配光分布特性を示す一実験結果である。It is one experimental result which shows the average light distribution characteristic of the perimeter direction of the said lamp.

以下、図面を参照しながら、本発明の実施形態を説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は本発明の一実施形態に係る灯器を示す斜視図、図２は灯器の平面（上面）図、図３は上面側から見た灯器の分解斜視図、図４は底面側から見た灯器の分解斜視図、図５は図２におけるＡ−Ａ線概略断面図である。 1 is a perspective view showing a lamp according to an embodiment of the present invention, FIG. 2 is a plan (top) view of the lamp, FIG. 3 is an exploded perspective view of the lamp viewed from the top side, and FIG. 4 is a bottom side. FIG. 5 is a schematic sectional view taken along line AA in FIG. 2.

本実施形態では、灯器として、空港の滑走路やヘリポート等に設置される航空標識灯（例えば境界灯、境界誘導灯、誘導路灯）を構成する埋込型標識灯を例に挙げて説明する。 In the present embodiment, an explanation will be given by taking, as an example, an embedded sign light constituting an aerial beacon light (for example, a boundary light, a boundary guide light, a guide road light) installed on a runway or a heliport of an airport. .

［灯器の全体構成］
本実施形態の灯器１は、上部に円盤部を有し、図１に示すように上記円盤部を上方に向けた状態で地面に埋設される。灯器１は、典型的には、図５に示すように、地中に埋設された基台２の内部に収容される形態で地面に設置される。 [Overall structure of the lamp]
The lamp 1 of this embodiment has a disk part in the upper part, and is embedded in the ground with the disk part facing upward as shown in FIG. As shown in FIG. 5, the lamp 1 is typically installed on the ground in a form of being housed in a base 2 embedded in the ground.

灯器１は、下部灯体１０（第１の灯体）と、上部灯体２０（第２の灯体）と、ＬＥＤ基板３０と、レンズ部材４０（灯器用レンズ）とを有し、これらを上下方向に積み重ねて構成される。後述するように、ＬＥＤ基板３０は、下部灯体１０と上部灯体２０との間に配置され、レンズ部材４０は、上部灯体２０とＬＥＤ基板３０との間に配置される。 The lamp 1 includes a lower lamp body 10 (first lamp body), an upper lamp body 20 (second lamp body), an LED substrate 30, and a lens member 40 (lamp lens). Are stacked in the vertical direction. As will be described later, the LED board 30 is disposed between the lower lamp body 10 and the upper lamp body 20, and the lens member 40 is disposed between the upper lamp body 20 and the LED board 30.

（下部灯体）
下部灯体１０は、アルミニウム合金等の金属材料で構成され、略円盤状のベース部１１を有する。ベース部１１は、図２及び図５に示すように、地表側に位置する主面１１１と、主面１１１に設けられた凹部１２とを有する。 (Lower lamp)
The lower lamp body 10 is made of a metal material such as an aluminum alloy and has a substantially disc-shaped base portion 11. As shown in FIGS. 2 and 5, the base portion 11 includes a main surface 111 located on the ground surface side and a recess 12 provided on the main surface 111.

凹部１２は、主面１１１の中央部に形成された円形の有底の段付き孔で構成され、円形の第１の底面１２１と、この第１の底面１２１の周囲に設けられた環状の第２の底面１２２とを有する。第１の底面１２１は、主面１１１から第１の深さで形成され、第２の底面１２２は、主面１１１から第１の深さよりも小さい（浅い）第２の深さで形成される。凹部１２は、レンズ部材４０を収容する第１の空間部Ｓ１を形成する。 The recess 12 is formed of a circular bottomed stepped hole formed in the center of the main surface 111, and has a circular first bottom surface 121 and an annular first bottom surface provided around the first bottom surface 121. 2 bottom surfaces 122. First bottom surface 121 is formed from main surface 111 at a first depth, and second bottom surface 122 is formed from main surface 111 at a second depth that is smaller (shallow) than the first depth. . The recess 12 forms a first space S 1 that accommodates the lens member 40.

主面１１１には、ベース部１１を基台２に固定する複数のボルトが各々挿通される複数の挿通孔Ｎ１を有する。各挿通孔Ｎ１は、凹部１２の周囲の複数個所（図示の例では３箇所）に等角度間隔で設けられる。ベース部１１は、主面１１１が地面と略同一平面となるように基台２に固定される。 The main surface 111 has a plurality of insertion holes N1 through which a plurality of bolts for fixing the base portion 11 to the base 2 are respectively inserted. The insertion holes N1 are provided at equiangular intervals at a plurality of locations around the recess 12 (three locations in the illustrated example). The base portion 11 is fixed to the base 2 so that the main surface 111 is substantially flush with the ground.

下部灯体１０は、図５に示すように、ベース部１１と同心的に形成された筒部１３と、ベース部１１と筒部１３との間に形成された仕切板部１４とをさらに有する。 As shown in FIG. 5, the lower lamp body 10 further includes a cylindrical portion 13 formed concentrically with the base portion 11 and a partition plate portion 14 formed between the base portion 11 and the cylindrical portion 13. .

筒部１３は、ベース部１１よりも小径の略円筒形状を有し、主面１１１とは反対側のベース部１１の裏面１１２に一体的に形成される。筒部１３の内部には、ＬＥＤ基板３０を駆動するドライバ基板５０や電源供給ラインと接続される各種端子部を収容する第２の空間部Ｓ２が形成される。筒部１３の底部は、シールリングＲ５を介して蓋体１５に被覆されている。 The cylindrical portion 13 has a substantially cylindrical shape having a smaller diameter than the base portion 11 and is integrally formed on the back surface 112 of the base portion 11 on the side opposite to the main surface 111. Inside the tube portion 13, a second space portion S 2 that accommodates a driver substrate 50 that drives the LED substrate 30 and various terminal portions connected to the power supply line is formed. The bottom portion of the cylindrical portion 13 is covered with a lid 15 via a seal ring R5.

仕切板部１４は、第１及び第２の空間部Ｓ１，Ｓ２を上下方向に仕切る平板で形成され、その上面で凹部１２の第１の底面１２１が構成される。仕切板部１４には複数の孔（ネジ孔、配線挿通孔）が穿設されており、後述するように所定の孔（配線挿通孔）に挿通された配線ケーブルを介してＬＥＤ基板３０とドライバ基板５０とが相互に電気的に接続される。 The partition plate portion 14 is formed of a flat plate that partitions the first and second space portions S1 and S2 in the vertical direction, and a first bottom surface 121 of the recess 12 is formed on the top surface thereof. A plurality of holes (screw holes, wiring insertion holes) are formed in the partition plate portion 14, and the LED board 30 and the driver are connected via a wiring cable inserted into a predetermined hole (wiring insertion hole) as will be described later. The substrate 50 is electrically connected to each other.

（上部灯体）
上部灯体２０は、アルミニウム合金等の金属材料で構成され、天板部２１と、柱体部２２とを有する。 (Upper lamp)
The upper lamp body 20 is made of a metal material such as an aluminum alloy, and includes a top plate portion 21 and a column body portion 22.

図５に示すように、天板部２１は、凹部１２の第１の底面１２１に対向し、柱体部２２は、天板部２１の中心から第１の底面１２１に向かって垂直方向に突出するように形成される。柱体部２２は、図４に示すように、基部２２０と先端部２２１とを有する略円柱状に形成される。基部２２０は、天板部２１に向かって外径が大きくなる逆円錐体状に形成され、先端部２２１は、凹部１２の第１の底面１２１に固定される。 As shown in FIG. 5, the top plate portion 21 faces the first bottom surface 121 of the recess 12, and the column body portion 22 projects in the vertical direction from the center of the top plate portion 21 toward the first bottom surface 121. To be formed. As shown in FIG. 4, the column body portion 22 is formed in a substantially cylindrical shape having a base portion 220 and a tip portion 221. The base portion 220 is formed in an inverted cone shape whose outer diameter increases toward the top plate portion 21, and the distal end portion 221 is fixed to the first bottom surface 121 of the recess 12.

天板部２１は、第１の底面１２１と同心的な円盤状に形成され、第１の底面１２１の外径と同等以下の大きさの外径を有する。天板部２１は、上記第１の深さ以上の大きさに相当する間隔をおいて第１の底面１２１に上下方向に対向する。 The top plate portion 21 is formed in a disk shape concentric with the first bottom surface 121, and has an outer diameter that is equal to or smaller than the outer diameter of the first bottom surface 121. The top plate portion 21 is opposed to the first bottom surface 121 in the vertical direction with an interval corresponding to the size of the first depth or more.

柱体部２２は、上記第１の深さ以上の大きさに相当する高さを有し、その先端部２２１は、第２の空間部Ｓ２から仕切板部１４に挿通されたボルトＢ１によって、第１の底面１２１の中心に密着するように固定される。図４及び図５に示すように、柱体部２２の外周面の所定位置には弾性リングＲ１が装着されている。弾性リングＲ１は、典型的には、Ｏリングで構成され、後述するように、レンズ部材４０の内周面に密着する。 The columnar portion 22 has a height corresponding to a size equal to or greater than the first depth, and the tip portion 221 thereof is bolted by the bolt B1 inserted from the second space portion S2 into the partition plate portion 14. The first bottom surface 121 is fixed so as to be in close contact with the center. As shown in FIGS. 4 and 5, an elastic ring R 1 is attached to a predetermined position on the outer peripheral surface of the column body portion 22. The elastic ring R1 is typically composed of an O-ring, and is in close contact with the inner peripheral surface of the lens member 40, as will be described later.

上部灯体２０は、図１〜図３に示すように、天板部２１の周囲に配置された環状板部２３と、天板部２１と環状板部２３との間を相互に連結する複数の連結部２４とをさらに有する。環状板部２３は、天板部２１と同心的な円環状に形成され、複数の連結部２４を介して天板部２１と一体的に形成される。 As shown in FIGS. 1 to 3, the upper lamp body 20 includes an annular plate portion 23 disposed around the top plate portion 21, and a plurality of interconnecting portions between the top plate portion 21 and the annular plate portion 23. The connecting portion 24 is further included. The annular plate portion 23 is formed in an annular shape concentric with the top plate portion 21, and is formed integrally with the top plate portion 21 via a plurality of connecting portions 24.

環状板部２３は、上記第２の深さに相当する厚みを有し、凹部１２の第２の底面１２２に支持される。環状板部２３の裏面の外周縁部には、第２の底面１２２の外周面に密着するシールリングＲ２が装着されており、これにより環状板部２３は、水平方向のガタツキを生じさせることなく凹部１２に収容される。環状板部２３は、図５に示すように、ベース部１１にその裏面１１２から挿通された複数のボルトＢ２によって、第２の底面１２２に密着するように固定される。これにより、環状板部２３の上面は、ベース部１１の主面１１１と略同一平面上に配置される。 The annular plate portion 23 has a thickness corresponding to the second depth and is supported by the second bottom surface 122 of the recess 12. A seal ring R 2 that is in close contact with the outer peripheral surface of the second bottom surface 122 is attached to the outer peripheral edge of the back surface of the annular plate portion 23, so that the annular plate portion 23 does not cause horizontal play. It is accommodated in the recess 12. As shown in FIG. 5, the annular plate portion 23 is fixed so as to be in close contact with the second bottom surface 122 by a plurality of bolts B 2 inserted into the base portion 11 from the back surface 112. Thereby, the upper surface of the annular plate portion 23 is disposed on substantially the same plane as the main surface 111 of the base portion 11.

複数の連結部２４は、天板部２１の周縁から等角度間隔で放射状に突出するように形成される。本実施形態では、天板部２１の上面は、環状板部２３の上面（ベース部１１の主面１１１）から所定の高さ（例えば６ｍｍ以下）だけ上方へ突出するように形成される。複数の連結部２４は、天板部２１の周縁と環状板部２３の上面との間を連結する。そして、各連結部２４の上面は、天板部２１から環状板部２３に向かって下り傾斜となるテーパ面を形成し、それらの下面は、環状板部２３の上面にその内周縁部から外周縁部にわたって一体的に接合される。複数の連結部２４は、環状板部２３の剛性を高めるリブとしての機能をも有する。連結部２４の数は特に限定されず、本例では３個の連結部２４が設けられる。 The plurality of connecting portions 24 are formed so as to protrude radially from the periphery of the top plate portion 21 at equal angular intervals. In the present embodiment, the top surface of the top plate portion 21 is formed so as to protrude upward by a predetermined height (for example, 6 mm or less) from the top surface of the annular plate portion 23 (the main surface 111 of the base portion 11). The plurality of connecting portions 24 connect the peripheral edge of the top plate portion 21 and the upper surface of the annular plate portion 23. The upper surface of each connecting portion 24 forms a tapered surface that is inclined downward from the top plate portion 21 toward the annular plate portion 23, and the lower surface thereof is formed on the upper surface of the annular plate portion 23 from the inner peripheral edge portion thereof. It is integrally joined over the periphery. The plurality of connecting portions 24 also have a function as ribs that increase the rigidity of the annular plate portion 23. The number of the connection parts 24 is not specifically limited, In this example, the three connection parts 24 are provided.

ベース部１１の主面１１１には、図１〜図３に示すように、複数の連結部２４に整列するように放射状に形成された複数の突起部１１３が設けられる。複数の突起部１１３は、凹部１２の周囲に等角度間隔に形成され、その数は、連結部２４の数に対応している。各突起部１１３の上面は、連結部２４の上面と連続するように、主面１１１の外周縁部に向かって下り傾斜となるテーパ面で形成される。各突起部１１３は、連結部２４の上面と略同一幅で形成され、主面１１１の外周縁部における主面１１１からの突出量は、ほぼゼロとされる。これにより、ベース部１１とその周囲の地面との間に段差が生じることを回避することができる。なお、突起部１１３は、必要に応じて省略してもよい。 As shown in FIGS. 1 to 3, the main surface 111 of the base portion 11 is provided with a plurality of projecting portions 113 that are radially formed so as to align with the plurality of connecting portions 24. The plurality of protrusions 113 are formed at equiangular intervals around the recess 12, and the number thereof corresponds to the number of connecting portions 24. The upper surface of each protrusion 113 is formed with a tapered surface that is inclined downward toward the outer peripheral edge of the main surface 111 so as to be continuous with the upper surface of the connecting portion 24. Each protrusion 113 is formed with substantially the same width as the upper surface of the connecting portion 24, and the amount of protrusion from the main surface 111 at the outer peripheral edge of the main surface 111 is substantially zero. Thereby, it can avoid that a level | step difference arises between the base part 11 and the surrounding ground. In addition, you may abbreviate | omit the projection part 113 as needed.

（ＬＥＤ基板）
ＬＥＤ基板３０は、図３及び図５に示すように、凹部１２の第１の底面１２１に配置される。ＬＥＤ基板３０は、複数のＬＥＤ素子３１（点光源）と、これら複数のＬＥＤ素子を支持する回路基板３２とを有する。 (LED board)
As shown in FIGS. 3 and 5, the LED substrate 30 is disposed on the first bottom surface 121 of the recess 12. The LED board 30 includes a plurality of LED elements 31 (point light sources) and a circuit board 32 that supports the plurality of LED elements.

複数のＬＥＤ素子３１は、図５に示すように、回路基板３２の上面に実装される。複数のＬＥＤ素子３１は、柱体部２２の周囲に環状に配置され、第１の底面１２１から天板部２１に向かって照明光を出射することが可能に構成される。ＬＥＤ素子３１は、砲弾型のパッケージ部品で構成されてもよいし、表面実装型の素子（ＳＭＤ）で構成されてもよい。ＬＥＤ素子３１は、等角度間隔で同一円周上に配列され、その数は特に限定されず、本例では１２個とされる。 The plurality of LED elements 31 are mounted on the upper surface of the circuit board 32 as shown in FIG. The plurality of LED elements 31 are arranged in a ring shape around the column body portion 22 and configured to emit illumination light from the first bottom surface 121 toward the top plate portion 21. The LED element 31 may be composed of a shell-type package component or a surface-mounted element (SMD). The LED elements 31 are arranged on the same circumference at equal angular intervals, and the number thereof is not particularly limited, and is 12 in this example.

照明光の色は特に限定されず、灯器１の仕様、用途等に応じて決定される。例えば、灯器１が境界灯として用いられる場合には白又は黄色の照明光を出射することが可能なＬＥＤ素子が用いられ、境界誘導灯として用いられる場合には緑色の照明光を出射することが可能なＬＥＤ素子が用いられる。誘導路灯として用いられる場合には青色の照明光を出射することが可能なＬＥＤ素子が用いられる。 The color of the illumination light is not particularly limited, and is determined according to the specification, application, etc. of the lamp 1. For example, when the lamp 1 is used as a boundary lamp, an LED element capable of emitting white or yellow illumination light is used, and when used as a boundary guide lamp, green illumination light is emitted. LED elements that can be used are used. When used as a guide road lamp, an LED element capable of emitting blue illumination light is used.

回路基板３２は、第１の底面１２１と同等又はこれよりも小径の円盤形状を有し、図３及び図４に示すように、中心部には柱体部２２が貫通する貫通孔３２０が設けられている。回路基板３２の周縁部には切欠き部３２１が形成されており、この切欠き部３２１が第１の底面１２１に設けられた配線挿通孔Ｎ２（図３）に対応するように第１の底面１２１に配置される。回路基板３２の上面には図示しないコネクタが搭載されており、配線挿通孔Ｎ２及び切欠き部３２１に挿通される配線ケーブルを介してドライバ基板５０と電気的に接続される。回路基板３２は、第１の空間部Ｓ１から挿通される複数のネジ部材（図示略）を介して第１の底面１２１に固定される。 The circuit board 32 has a disk shape that is equal to or smaller in diameter than the first bottom surface 121, and as shown in FIGS. 3 and 4, a through hole 320 through which the column body portion 22 passes is provided in the center portion. It has been. A notch 321 is formed at the peripheral edge of the circuit board 32, and the notch 321 corresponds to the wiring insertion hole N 2 (FIG. 3) provided in the first bottom 121. 121. A connector (not shown) is mounted on the upper surface of the circuit board 32, and is electrically connected to the driver board 50 via a wiring cable inserted through the wiring insertion hole N2 and the notch 321. The circuit board 32 is fixed to the first bottom surface 121 via a plurality of screw members (not shown) inserted from the first space portion S1.

（レンズ部材）
レンズ部材４０は、第１の空間部Ｓ１に収容される。レンズ部材４０は、天板部２１とＬＥＤ基板３０（あるいは第１の底面１２１）との間に配置される。 (Lens member)
The lens member 40 is accommodated in the first space S1. The lens member 40 is disposed between the top plate portion 21 and the LED substrate 30 (or the first bottom surface 121).

図６〜図９はレンズ部材４０を示しており、図６は斜視図、図７は正面図、図８は平面図（上面図）、図９は底面図である。 6 to 9 show the lens member 40, FIG. 6 is a perspective view, FIG. 7 is a front view, FIG. 8 is a plan view (top view), and FIG. 9 is a bottom view.

レンズ部材４０は、レンズ本体４１と、環状の光入射部４２と、環状の光出射部４３とを有する。レンズ本体４１は、ＬＥＤ基板３０に対向する下端部４１１（一端部または第１の端部）と、天板２１に対向する上端部４１２（他端部または第２の端部）とを有する。光入射部４２はレンズ本体４１の下端部４１１に設けられ、光出射部４３は、レンズ本体４１の上端部４１２の外周縁部に設けられる。 The lens member 40 includes a lens body 41, an annular light incident part 42, and an annular light emitting part 43. The lens body 41 has a lower end portion 411 (one end portion or first end portion) facing the LED substrate 30 and an upper end portion 412 (other end portion or second end portion) facing the top plate 21. The light incident portion 42 is provided at the lower end portion 411 of the lens body 41, and the light emitting portion 43 is provided at the outer peripheral edge portion of the upper end portion 412 of the lens body 41.

レンズ本体４１は、透光性材料で構成され、典型的には、透明なガラス材料あるいはプラスチック材料で構成される。レンズ本体４１は、その中心部に開口部４１０を有しており、図５に示す断面形状を開口部４１０の中心軸に関して回転させた３次元構造体で構成される。レンズ本体４１は、天板部２１と同心的に第１の空間部Ｓ１に配置される。 The lens body 41 is made of a translucent material, and is typically made of a transparent glass material or plastic material. The lens body 41 has an opening 410 at the center thereof, and is formed of a three-dimensional structure obtained by rotating the cross-sectional shape shown in FIG. 5 with respect to the center axis of the opening 410. The lens body 41 is disposed concentrically with the top plate portion 21 in the first space portion S1.

レンズ本体４１の開口部４１０には柱体部２２が貫通しており、開口部４１０の最小径内周面は、柱体部２２の外周面に装着された弾性リングＲ１に密着している。これにより柱体部２２によるレンズ部材４０の位置決めが容易となるため、天板部２２に対するレンズ部材４０の位置精度が高まるとともに、組立性の向上が図れるようになる。 The column body 22 passes through the opening 410 of the lens body 41, and the minimum diameter inner circumferential surface of the opening 410 is in close contact with the elastic ring R 1 attached to the outer circumferential surface of the column body 22. As a result, the lens member 40 can be easily positioned by the columnar portion 22, so that the positional accuracy of the lens member 40 with respect to the top plate portion 22 is increased and the assemblability can be improved.

また、レンズ部材４０と上部灯体２０との間には、環状の弾性シートＲ３と、環状と弾性部材Ｒ４とがそれぞれ配置されている。弾性シートＲ３は、レンズ本体４１の上端部４１２と天板２１の下面との間に配置され、弾性部材Ｒ４は、レンズ本体４１の外周部と環状板部２３の内周面との間に配置されている。これら弾性シートＲ３及び弾性部材Ｒ４は、第１の空間部Ｓ１への雨水や塵埃の侵入を防止するとともに、上部灯体２０に作用する外力（衝撃荷重）からレンズ部材４０を保護する機能を有する。 Also, between the lens member 40 and the upper lamp body 20, an annular elastic sheet R3, and an annular and elastic member R4 are respectively disposed. The elastic sheet R3 is disposed between the upper end portion 412 of the lens main body 41 and the lower surface of the top plate 21, and the elastic member R4 is disposed between the outer peripheral portion of the lens main body 41 and the inner peripheral surface of the annular plate portion 23. Has been. The elastic sheet R3 and the elastic member R4 have a function of preventing rainwater and dust from entering the first space S1 and protecting the lens member 40 from an external force (impact load) acting on the upper lamp body 20. .

光入射部４２は、複数のＬＥＤ素子３１と対向するように、レンズ本体４１の下端部４１１に設けられた環状の溝部で構成される。上記溝部の断面は、図５に示すように半円又は略半円形状に形成される。レンズ本体４１の下端部４１１は、図５に示すように、ＬＥＤ基板３０に接触する。ＬＥＤ基板３０上の複数のＬＥＤ素子３１は、光入射部４２を構成する上記環状の溝部の中に収容される。これにより、光出射部４３に向けて必要光度の照明光を効率よく導くことができるとともに、レンズ部材４０との接触による損傷から保護される。 The light incident part 42 is configured by an annular groove provided in the lower end part 411 of the lens body 41 so as to face the plurality of LED elements 31. The cross section of the groove is formed in a semicircular or substantially semicircular shape as shown in FIG. The lower end 411 of the lens body 41 is in contact with the LED substrate 30 as shown in FIG. The plurality of LED elements 31 on the LED substrate 30 are accommodated in the annular groove that forms the light incident portion 42. Thereby, the illumination light of the required luminous intensity can be efficiently guided toward the light emitting portion 43 and protected from damage due to contact with the lens member 40.

また、各ＬＥＤ素子５１は、光入射部４２を構成する上記溝部の半円の中心部に配置される。これにより、各ＬＥＤ素子５１から放射される照明光を効率よくレンズ本体４１の内部に入射させることが可能となるため、光源の光利用効率を高めることが可能となる。 Each LED element 51 is disposed at the center of a semicircle of the groove part constituting the light incident part 42. Thereby, it becomes possible to make the illumination light radiated | emitted from each LED element 51 enter the inside of the lens main body 41 efficiently, and it becomes possible to improve the light utilization efficiency of a light source.

一方、光出射部４３は、レンズ本体４１の上端部４１２の外周縁部に設けられ、上記照明光を出射する。レンズ本体４１の上端部４１２の外周縁部は、天板部２１の外径よりも大きな外径を有する。光出射部４３は、その外周縁部に設けられた環状の切欠き部で構成される。そして、光出射部４３は、レンズ本体４１の上端部の周縁部に設けられた環状平面部４３１と、この環状平面部４３１の内周縁部から立上り形成された環状壁部４３２とを有する。 On the other hand, the light emitting portion 43 is provided at the outer peripheral edge portion of the upper end portion 412 of the lens body 41 and emits the illumination light. The outer peripheral edge portion of the upper end portion 412 of the lens body 41 has an outer diameter larger than the outer diameter of the top plate portion 21. The light emission part 43 is comprised by the cyclic | annular notch part provided in the outer periphery part. The light emitting portion 43 includes an annular flat surface portion 431 provided at the peripheral edge portion of the upper end portion of the lens body 41 and an annular wall portion 432 that rises from the inner peripheral edge portion of the annular flat surface portion 431.

環状平面部４３１は、図１及び図２に示すように、上面から見たときに天板部２１の外側に位置する。環状壁部４３２もまた、天板部２１の外側に位置するが、これに限られず、天板部２１の周縁部に対応する位置に設けられてもよい。天板部２１から周囲への光出射部４３の突出が抑えられるため、光出射部４３に外力が直接的に加わることを効果的に阻止することができる。環状壁部４３２は、環状平面部４３１に対して斜めに形成されてもよいし、垂直に形成されてもよい。 As shown in FIGS. 1 and 2, the annular flat surface portion 431 is located outside the top plate portion 21 when viewed from the upper surface. The annular wall portion 432 is also located outside the top plate portion 21, but is not limited thereto, and may be provided at a position corresponding to the peripheral portion of the top plate portion 21. Since the protrusion of the light emitting portion 43 from the top plate portion 21 to the surroundings is suppressed, it is possible to effectively prevent external force from being directly applied to the light emitting portion 43. The annular wall portion 432 may be formed obliquely with respect to the annular flat surface portion 431 or may be formed perpendicularly.

レンズ本体４１は、下端部から上端部に向かうに従って外径及び内径がそれぞれ大きくなる外周面４１３及び内周面４１４を有する環状体で構成される。これにより、光入射部４２から入射した光を外周面４１１及び内周面４１２で全反射させながら光出射部４３へ容易に導くことが可能となる。 The lens body 41 is formed of an annular body having an outer peripheral surface 413 and an inner peripheral surface 414 that increase in outer diameter and inner diameter from the lower end portion toward the upper end portion, respectively. As a result, the light incident from the light incident portion 42 can be easily guided to the light emitting portion 43 while being totally reflected by the outer peripheral surface 411 and the inner peripheral surface 412.

本実施形態では、レンズ本体４１の外周面４１３は、径外方へ凸なる形状の曲面（第１の曲面）で形成され、レンズ本体４１の内周面４１４は、径内方へ凸なる形状の曲面（第２の曲面）で形成される。上記第１及び第２の曲面は、典型的には非球面であるが、球面であってもよい。また本実施形態では、第１の曲面（外周面４１３）は、第２の曲面（内周面４１４）よりも曲率が小さく（曲率半径が大きく）形成される。 In the present embodiment, the outer peripheral surface 413 of the lens body 41 is formed as a curved surface (first curved surface) that protrudes radially outward, and the inner peripheral surface 414 of the lens body 41 protrudes radially inward. The curved surface (second curved surface). The first and second curved surfaces are typically aspherical surfaces, but may be spherical surfaces. In the present embodiment, the first curved surface (outer peripheral surface 413) is formed to have a smaller curvature (larger curvature radius) than the second curved surface (inner peripheral surface 414).

［灯器の動作］
次に、以上のように構成される灯器１の典型的な動作について説明する。 [Operation of the lamp]
Next, a typical operation of the lamp 1 configured as described above will be described.

灯器１は、図５に示すように基台２の内部に設置される。このとき、灯器１は、ベース部１１の主面１１１が地面と同一平面となるように地面に埋め込まれる。天板部２１の上面は、主面１１１に対して上方に所定の高さ（約６ｍｍ）だけ突出している。 The lamp 1 is installed inside the base 2 as shown in FIG. At this time, the lamp 1 is embedded in the ground so that the main surface 111 of the base portion 11 is flush with the ground. The top surface of the top plate portion 21 protrudes upward from the main surface 111 by a predetermined height (about 6 mm).

ドライバ基板５０は、蓋体１５を介して基台２の内部に収容された電源供給ラインに電気的に接続される。ＬＥＤ基板３０は、仕切板部１４に挿通された配線ケーブルを介してドライバ基板５０に電気的に接続される。複数のＬＥＤ素子３１は、回路基板３２を介して供給されるドライバ基板５０からの入力電流によって同時に発光する。複数のＬＥＤ素子３１から放射された照明光は、レンズ部材４０の光入射部４２を介してレンズ本体４１の内部へ入射し、光出射部４３から出射する。 The driver board 50 is electrically connected to a power supply line accommodated in the base 2 via the lid 15. The LED board 30 is electrically connected to the driver board 50 via a wiring cable inserted through the partition plate portion 14. The plurality of LED elements 31 emit light simultaneously by an input current from the driver board 50 supplied via the circuit board 32. Illumination light emitted from the plurality of LED elements 31 enters the lens body 41 through the light incident part 42 of the lens member 40 and exits from the light emitting part 43.

図１０は、光入射部４２から光出射部４３へ至る照明光の光線追跡図である。 FIG. 10 is a ray tracing diagram of illumination light from the light incident part 42 to the light emitting part 43.

図１０に示すように、光入射部４２を介してレンズ部材４０の内部に入射したＬＥＤ素子３１からの照明光Ｌは、レンズ部材４０の外周面４１３及び内周面４１４を全反射し、レンズ本体４１の内部で周方向に均一化されながら光出射部４３へ導かれる。これにより、レンズ部材の薄型化を実現しつつ、目的とする光度の照明光を全周方向（径方向外方）に照射することが可能となる。 As shown in FIG. 10, the illumination light L from the LED element 31 that has entered the lens member 40 through the light incident portion 42 is totally reflected on the outer peripheral surface 413 and the inner peripheral surface 414 of the lens member 40, and the lens. The light is guided to the light emitting portion 43 while being uniformed in the circumferential direction inside the main body 41. Accordingly, it is possible to irradiate illumination light having a target light intensity in the entire circumferential direction (outward in the radial direction) while realizing a thin lens member.

このとき、レンズ部材４０の外周面４１３及び内周面４１４を構成する各々の曲面が、内部反射した照明光Ｌをレンズ部材４０の上端部４１２の外周縁部（光出射部４３）に配向するように各々の曲率が最適化される。これにより光入射部４２と光出射部４３との間の相対位置に依存しない効率的な光学設計が可能となり、設計自由度の向上を図れるようになる。 At this time, the curved surfaces constituting the outer peripheral surface 413 and the inner peripheral surface 414 of the lens member 40 orient the internally reflected illumination light L to the outer peripheral edge (light emitting portion 43) of the upper end portion 412 of the lens member 40. Thus, the curvature of each is optimized. As a result, an efficient optical design that does not depend on the relative position between the light incident part 42 and the light emitting part 43 becomes possible, and the degree of freedom in design can be improved.

光出射部４３に到達した照明光Ｌは、灯器１の全周方向に水平及びこれよりも所定角度上方に向かって出射する。光出射部４３における環状平面部４３１は、水平方向に略平行に形成されているため、主として、照明光Ｌを斜め上方へ向けて屈折させ、照明光を所定の仰角で出射させる第１の光出射面として機能する。一方、光出射部４３における環状壁部４３２は、水平方向に対して直交あるいは斜めに交差するため、主として、照明光Ｌを水平方向あるいは所定の仰角で出射させる第２の光出射面として機能する。 The illumination light L that has reached the light emitting portion 43 is emitted horizontally in the entire circumferential direction of the lamp 1 and upwards by a predetermined angle. Since the annular flat surface portion 431 in the light emitting portion 43 is formed substantially parallel to the horizontal direction, the first light that mainly refracts the illumination light L obliquely upward and emits the illumination light at a predetermined elevation angle. Functions as an exit surface. On the other hand, since the annular wall portion 432 in the light emitting portion 43 intersects with the horizontal direction at right angles or obliquely, it functions mainly as a second light emitting surface for emitting the illumination light L at the horizontal direction or at a predetermined elevation angle. .

図１１及び図１２は、灯器１の配光分布特性の一例を示しており、図１１は鉛直方向の平均配光図を、図１２は水平方向の平均配光図である。ここでは、照明光Ｌとして境界灯用の白色光を用いた。図１１において縦軸は光度［ｃｄ］を、横軸は角度（仰角）［ｄｅｇ］をそれぞれ表し、実線は測定値を、一点鎖線は航空法で定められる基準値をそれぞれ示す。図１２において周方向の数字は角度［ｄｅｇ］を、丸括弧内の数字は光度［ｃｄ］をそれぞれ表している。 11 and 12 show an example of the light distribution characteristics of the lamp device 1. FIG. 11 is an average light distribution diagram in the vertical direction, and FIG. 12 is an average light distribution diagram in the horizontal direction. Here, white light for a boundary lamp is used as the illumination light L. In FIG. 11, the vertical axis represents luminous intensity [cd], the horizontal axis represents angle (elevation angle) [deg], the solid line represents the measured value, and the alternate long and short dash line represents the reference value determined by the Aviation Law. In FIG. 12, the numbers in the circumferential direction represent the angle [deg], and the numbers in parentheses represent the luminous intensity [cd].

図１１及び図１２に示すように、本実施形態の灯器１によれば、水平全周方向に規定光度以上の照明光を照射することができる。
なお、図１２において、０度、１２０度及び２４０度の各方向の光度が他の角度方向と比較して光度が低下しているのは、上部灯体２０の連結部２４の存在が影響するためである。本実施形態では、環状に配列された複数のＬＥＤ素子３１を光源に用いているため、各ＬＥＤ素子３１からの出射光がレンズ部材４０の内部で周方向に拡散しながら光出射部４３へ導かれるため、上記角度方向における光度の低下を抑制することが可能となる。 As shown in FIG.11 and FIG.12, according to the lamp 1 of this embodiment, the illumination light more than a regular luminous intensity can be irradiated to a horizontal perimeter direction.
In FIG. 12, the light intensity in each direction of 0 degrees, 120 degrees, and 240 degrees is lower than the other angular directions because the presence of the connecting portion 24 of the upper lamp body 20 affects. Because. In the present embodiment, since a plurality of LED elements 31 arranged in an annular shape are used as the light source, the emitted light from each LED element 31 is guided to the light emitting portion 43 while diffusing in the circumferential direction inside the lens member 40. Therefore, it is possible to suppress a decrease in luminous intensity in the angular direction.

また、本実施形態によれば、灯器１が以下の構成を有しているため、耐荷重性能の向上を実現することができる。 Moreover, according to this embodiment, since the lamp 1 has the following configuration, it is possible to improve the load bearing performance.

すなわち本実施形態の灯器１において、上部灯体２０は、天板部２１から凹部１２の第１の底面１２１に向かって突出し先端部２２１が第１の底面１２１に固定される柱体部２２を有しているため、上部灯体２０に乗り上げた重量物の荷重は、柱体部２２を介して下部灯体１０に加わることになる。このように柱体部２２を介して荷重を下部灯体１０に逃がし、力を分散させることができるため、耐荷重強度が高まり、重量物に対する耐久性の向上を図ることが可能となる。 That is, in the lamp 1 of the present embodiment, the upper lamp body 20 protrudes from the top plate portion 21 toward the first bottom surface 121 of the recess 12 and the column portion 22 whose tip portion 221 is fixed to the first bottom surface 121. Therefore, the load of the heavy object riding on the upper lamp body 20 is applied to the lower lamp body 10 via the column body section 22. Thus, since the load can be released to the lower lamp body 10 via the column body portion 22 and the force can be dispersed, the load-bearing strength is increased and the durability against heavy objects can be improved.

また、上部灯体２０の天板部２１は、複数の連結部２４を介して、凹部１２の第２の底面１２２に支持される環状板部２３に一体的に結合されているため、天板部２１に過度な剛性を要求せずとも上記作用を確保することが可能となる。これにより、天板部２１の厚みを低減できるため、地面からの突出量を抑えることが可能となる。 Further, the top plate portion 21 of the upper lamp body 20 is integrally coupled to the annular plate portion 23 supported by the second bottom surface 122 of the recess 12 via the plurality of connecting portions 24. The above-described action can be ensured without requiring excessive rigidity for the portion 21. Thereby, since the thickness of the top-plate part 21 can be reduced, it becomes possible to suppress the protrusion amount from the ground.

また、環状板部２３は、ベース部１１の主面１１１から第２の底面部１２２までの深さと同一の厚みで形成されているため、主面１１１からの環状板部２３の突出量をほぼゼロにすることができ、主面１１１から天板部２１の突出量の最小化を図ることができる。しかも、複数の連結部２４の間から光出射部４３を外部へ露出させることができるため、光出射部４３の投光部としての機能を確保することができる。 Further, since the annular plate portion 23 is formed with the same thickness as the depth from the main surface 111 of the base portion 11 to the second bottom surface portion 122, the amount of protrusion of the annular plate portion 23 from the main surface 111 is substantially reduced. The amount of protrusion of the top plate portion 21 from the main surface 111 can be minimized. Moreover, since the light emitting part 43 can be exposed to the outside from between the plurality of connecting parts 24, the function of the light emitting part 43 as a light projecting part can be ensured.

さらに、レンズ部材４０に上記荷重が加わることが回避されるため、レンズ部材４０の破損が防止される。さらに、レンズ部材４０に高価な高強度材料を用いる必要がなくなるため、コストの低下を図ることができる。 Furthermore, since it is avoided that the load is applied to the lens member 40, the lens member 40 is prevented from being damaged. Furthermore, since it is not necessary to use an expensive high-strength material for the lens member 40, the cost can be reduced.

以上、本発明の実施形態について説明したが、本発明は上述の実施形態にのみ限定されるものではなく種々変更を加え得ることは勿論である。 As mentioned above, although embodiment of this invention was described, this invention is not limited only to the above-mentioned embodiment, Of course, a various change can be added.

例えば以上の実施形態では、灯器として、航空標識灯（例えば境界灯、境界誘導灯、誘導路灯）を構成する埋込型標識灯を例に挙げて説明したが、これに限られず、車道や歩道に設置される自発光型の道路鋲、屋内外に設置される各種照明器具等にも本発明は適用可能である。また、上記灯器は、室内の壁や天井に設置された間接照明器具として使用されてもよい。 For example, in the above-described embodiment, the description has been given by taking an example of an embedded beacon lamp that constitutes an aerial beacon lamp (for example, a boundary light, a boundary guide light, a taxiway light), but the present invention is not limited to this. The present invention is also applicable to a self-luminous road fence installed on a sidewalk, various lighting fixtures installed indoors and outdoors, and the like. Moreover, the said lamp may be used as an indirect lighting fixture installed in the indoor wall and ceiling.

また、以上の実施形態では、レンズ部材４０の光出射部４３に環状平面部４３１及び環状壁面部４３２がそれぞれ設けられたが、これら環状平面部及び環状壁面部が径内方に向かって交互に多段に設けられてもよいし、環状平面部及び環状壁面部の一方が省略されてもよい。 In the above embodiment, the light emitting portion 43 of the lens member 40 is provided with the annular flat surface portion 431 and the annular wall surface portion 432. However, the annular flat surface portion and the annular wall surface portion are alternately directed radially inward. It may be provided in multiple stages, and one of the annular flat surface portion and the annular wall surface portion may be omitted.

１…灯器
１０…下部灯体（第１の灯体）
１１…ベース部
１１１…主面
１２…凹部
１２１…第１の底面
１２２…第２の底面
２０…上部灯体（第２の灯体）
２１…天板部
２２…柱体部
２３…環状板部
２４…連結部
３０…ＬＥＤ基板
３１…ＬＥＤ素子
４０…レンズ部材
４１…レンズ本体
４２…光入射部
４３…光出射部
４３１…環状平面部
４３２…環状壁面部 1 ... Lamp 10 ... Lower lamp (first lamp)
DESCRIPTION OF SYMBOLS 11 ... Base part 111 ... Main surface 12 ... Recessed part 121 ... 1st bottom face 122 ... 2nd bottom face 20 ... Upper lamp body (2nd lamp body)
DESCRIPTION OF SYMBOLS 21 ... Top plate part 22 ... Column body part 23 ... Ring plate part 24 ... Connection part 30 ... LED board 31 ... LED element 40 ... Lens member 41 ... Lens main body 42 ... Light incident part 43 ... Light emitting part 431 ... Ring plane part 432 ... annular wall surface

Claims

A first lamp body having a main surface and a concave portion provided on the main surface and having a first bottom surface having a first depth;
A top plate portion opposed to the first bottom surface; and a column body portion projecting from the top plate portion toward the first bottom surface, the tip of the column body portion being fixed to the first bottom surface. A second lamp,
A plurality of point light sources arranged annularly around the column body part and emitting illumination light from the first bottom surface toward the top plate part;
A lens body made of a translucent material and having an opening through which the column body portion penetrates; an annular light incident portion provided at one end of the lens body and facing the plurality of point light sources; and An annular light emitting portion that is provided at an outer peripheral edge portion of the other end portion and emits the illumination light, and includes a lens member disposed between the first bottom surface and the top plate portion. Lamp.

The lamp according to claim 1,
The recess further includes an annular second bottom surface provided around the first bottom surface and having a second depth smaller than the first depth,
The second lamp body is arranged around the top plate portion and is supported by the second bottom surface, and a plurality of interconnecting portions between the top plate portion and the annular plate portion. And a connecting part.

The lamp according to claim 2,
The second lamp body has a height equal to or greater than the first depth,
The annular plate portion has a thickness that is the same as the second depth.

The lamp device according to any one of claims 1 to 3,
A lamp device further comprising an elastic member disposed between the top plate portion and the lens body.

The lamp according to any one of claims 1 to 4,
The said light-incidence part is comprised at the said one end part of the said lens main body, and is comprised with the cyclic | annular groove part which accommodates these several point light sources.

The lamp according to claim 5,
The cross section of the groove is formed in a semicircular shape,
The plurality of point light sources are arranged in a central portion of the semicircle.

The lamp according to claim 5 or 6,
The said lens main body is comprised with the annular body which has an outer peripheral surface and an internal peripheral surface from which an outer diameter and an internal diameter each become large as it goes to the said other end part from the said one end part.

The lamp according to claim 7,
The outer peripheral surface of the lens body is formed of a first curved surface having a shape that protrudes radially outward,
The said inner peripheral surface of the said lens main body is formed with the 2nd curved surface of the shape which protrudes radially inward.

The lamp according to claim 7 or 8,
The light emitting part is
An annular flat surface provided at the outer peripheral edge of the other end of the lens body;
An annular wall portion that rises from the inner peripheral edge of the annular flat surface portion.

A lamp according to any one of claims 1 to 9,
The lamp device further comprising an elastic ring that is attached to the outer peripheral portion of the column body and is in close contact with the opening of the lens member.

A lamp device according to any one of claims 1 to 10,
The plurality of point light sources are a plurality of LED elements.