JPH0529083U - Backlit sign - Google Patents

Abstract

(57)【要約】 （修正有） 【目的】 内照式看板において、照明むらを生じること
なく直管蛍光灯の本数を減らし、設備費、電力料、補修
費を節減する。 【構成】 一面に文字・画面等の標識を有する半透明シ
−トを展張し、内部に直管状光源と反射板を交互に平行
に配置した箱状の内照式看板において、反射板の反射面
が白色半光沢であり、断面は両側に水平部を有する山形
であることを特徴とする。 【効果】 特定の反射板により従来の直管状光源の本数
を半減しても照明むらを生ずることがなく、かつ既設の
内照式看板の場合、反射板の装着が容易である。(57) [Summary] (Correction) [Purpose] For internally illuminated signboards, reduce the number of straight fluorescent lamps without uneven lighting and reduce equipment costs, electricity costs, and repair costs. [Structure] In a box-shaped internally illuminated signboard in which a semi-transparent sheet with signs such as characters and screens is spread on one surface and a straight tubular light source and a reflector are alternately arranged inside, the reflection of the reflector The surface is white and semi-glossy, and the cross section is mountain-shaped with horizontal portions on both sides. [Effect] Even if the number of conventional straight-tube light sources is halved by a specific reflector, uneven illumination does not occur, and in the case of an existing internally illuminated signboard, the reflector can be easily attached.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、反射板を利用した省電力型の内照式看板に関する。 The present invention relates to a power saving type internally illuminated signboard that uses a reflector.

【０００２】[0002]

【従来の技術】[Prior Art]

一般に内照式看板は、一面或いは両面に開口を有する箱状のケースに、直管蛍 光灯（以下単に蛍光灯と記す）を複数本配置し、開口部には白色半透明のアクリ ル板や塩ビ系可撓性シート等の光拡散性シートと文字・図形等の標識を表示する シートを重ねるか、または一体に構成して装着し、夜間または室内において内部 の蛍光灯からの照明により文字・図形等の標識を明瞭に視認させるものである。 この方式の内照式看板では、蛍光灯の配置、光拡散性シートの性能等が適切でな い場合、看板面の照明むら（輝度むら）が生じ、看板としての価値が著しく低下 する。このような照明むらを軽減するには、蛍光灯の間隔を小さくする、蛍 光灯と光拡散性シートの間隔を大きくする、光拡散性シートの光透過率を小さ くする等の手段がある。しかし、これらの手段はそれぞれ、設備費、維持費が 高くなる、看板の厚さが大となる、画面が暗くなるか、または蛍光灯をふや す必要を生じる等の不都合がある。現在設置されている内照式看板においても照 明の均一化のために蛍光灯の本数が多くなり、設備費、電力料、補修費が高額に なる問題点を抱えている。 In general, internally illuminated signboards have multiple straight tube fluorescent lamps (hereinafter simply referred to as fluorescent lamps) arranged in a box-shaped case with an opening on one side or both sides, and a white translucent acrylic plate at the opening. A sheet that displays signs such as letters and figures and a light diffusing sheet such as a vinyl chloride type flexible sheet, etc., can be placed on top of each other, or can be attached as a single unit and illuminated by a fluorescent lamp inside at night or indoors.・ Signs such as figures are clearly visible. In this type of internally illuminated signboard, if the arrangement of fluorescent lamps and the performance of the light diffusing sheet are not appropriate, uneven lighting (uneven brightness) on the signboard surface will occur, significantly reducing the value as a signboard. To reduce such uneven lighting, there are means such as reducing the distance between the fluorescent lamps, increasing the distance between the fluorescent lamps and the light diffusing sheet, and decreasing the light transmittance of the light diffusing sheet. . However, each of these means has disadvantages such as high equipment cost and maintenance cost, thick signboard, dark screen, or need to illuminate a fluorescent lamp. Even in the interior lighting signboards that are currently installed, the number of fluorescent lamps is increased to make the lighting uniform, and there is a problem in that equipment costs, electricity costs, and repair costs are high.

【０００３】 このような不都合を回避しつつ照明むらを軽減する技術がいくつか提案されて おり、その内容は、反射板を用いるか、調光スクリーンを用いるか、両者を併用 するものである。たとえば、実用昭５７−２８４８５には凹面の反射板を全背面 に設ける考案が、実開昭５９−６０６８３には将棋の駒様の断面の反射板を蛍光 灯の間に設ける考案が、そして実開昭５９−８４５８１および実開昭６１−４３ １１には逆Ｖ字状乃至山形の反射板が開示されている。また実開平２−２４８８ ７には山形の反射板と併せて照度を均一にするため光遮蔽膜を用いる照明ユニッ トが提案されている。Several techniques have been proposed to reduce the uneven illumination while avoiding such inconvenience, and the contents thereof are to use a reflector, a light control screen, or a combination of both. For example, in Japanese Utility Model Sho 57-28485, an idea of providing a concave reflector plate on the entire back surface is used, and in Japanese Utility Model Sho 59-60683, an idea of providing a reflector plate having a shogi piece-like cross section between fluorescent lamps. JP-A-59-84581 and JP-A-61-4311 disclose an inverted V-shaped or chevron-shaped reflector. In addition, Japanese Utility Model Laid-Open No. 2-248887 proposes an illumination unit that uses a light-shielding film in order to make the illuminance uniform together with a chevron-shaped reflector.

【０００４】 これらの考案は、それぞれ照明むらの軽減に効果があるものと認められるが、 本願考案者が実験した装置の場合はこれらの反射板のみで照明むらを全く視認で きないレベルまで改善することはできなかった。It is recognized that these devices are effective in reducing uneven illumination, but in the case of the device tested by the inventor of the present application, it is possible to improve the uneven illumination to a level where only these reflectors are not visible. I couldn't.

【０００５】[0005]

【考案が解決しようとする課題】[Problems to be solved by the device]

本考案は、従来の内照式看板の蛍光灯の間隔を２倍、本数は２分の１にしても 照明むらが目立たない省電力型の内照式看板を提供することを目的としている。 It is an object of the present invention to provide a power-saving internal lighting signboard in which even if the fluorescent lamps of the conventional internal lighting signboard are doubled and the number of fluorescent lamps is halved, uneven lighting is not noticeable.

【０００６】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

上記の課題を解決するため、本願考案者は従来の内照式看板の蛍光灯を１本お きにはずし、その位置に反射板をとりつけ、その形および表面の光学的特性につ き鋭意検討を加えた結果本考案に到達した。 即ち、一面に開口を有する薄い箱状のケースと、このケース内に一定の間隔で 平行に配置された複数の直管状光源と、隣接する直管状光源の中間に直管状光源 と平行に設置された反射板と、開口面に展張された表面に文字・画面等の標識を 有する半透明シートからなる内照式看板において、反射板は反射面が白色半光沢 であり、その断面は両側に水平部を有する山形であり、長さは直管状光源とほぼ 同じであることを特徴とする内照式看板である。 In order to solve the above-mentioned problems, the inventor of the present application removes one conventional fluorescent lamp of an internally illuminated signboard, attaches a reflector at that position, and diligently investigates the shape and the optical characteristics of the surface. As a result, the present invention was reached. That is, a thin box-shaped case having an opening on one surface, a plurality of straight tubular light sources arranged in parallel in the case at regular intervals, and installed in parallel with the straight tubular light source in the middle of adjacent straight tubular light sources. In an internally illuminated signboard consisting of a reflective plate and a semi-transparent sheet with signs such as letters and screens spread on the opening surface, the reflective plate has a white reflective surface and its cross section is horizontal on both sides. It is an internally illuminated signboard, which is a mountain shape with a portion and is approximately the same in length as a straight tube light source.

【０００７】 本考案の特長は反射板の形と表面の光学的特性にあることは前述のとおりであ るが、この両者は相互にある程度依存する関係にある。まず表面の光学的特性に ついては鏡面に近い表面は全反射による輝度の強弱の差が顕著に現われ、照明む らが出やすく、逆に完全なつや消しの表面では反射板による意図的な光の制御が しにくい。したがって、両者の中間の白色半光沢面が適当であり、具体的には通 常の白色の塗装面が使用できる。As described above, the feature of the present invention lies in the shape and the optical characteristics of the surface of the reflection plate, but these two are dependent to each other to some extent. First of all, regarding the optical characteristics of the surface, on the surface close to the mirror surface, the difference in the intensity of the brightness due to total reflection is noticeable, and uneven illumination is likely to occur, and conversely on a completely matte surface, the intentional control of light by the reflector is used. It is difficult to remove. Therefore, a white semi-glossy surface between the two is suitable, and specifically, a normal white painted surface can be used.

【０００８】 反射板の形については、逆Ｖ字状乃至山形のみでは多小形と大きさを変えても 蛍光灯と蛍光灯の間に暗く見える部分が生じ照明むらとして視認された。一方山 形の両側に水平部分を付加した反射板の場合は、蛍光灯と蛍光灯の間に照明むら は視認できなかった。山形の両側の水平部分を蛍光灯の背面まで延長した場合は 蛍光灯前面の輝度が高くなりすぎ照明むらを生じやすくなる。蛍光灯の両側に蛍 光灯の直径程度の巾で反射板のない部分を残すのがよく、これによって蛍光灯前 面に光遮蔽膜を用いる必要はなくなる。Regarding the shape of the reflection plate, only an inverted V shape or a mountain shape was visually recognized as uneven illumination due to a dark portion between the fluorescent lamps even if the size was changed to a multi-small size. On the other hand, in the case of the reflector with horizontal parts added to both sides of the mountain, no illumination unevenness was visible between the fluorescent lamps. If the horizontal parts on both sides of the chevron are extended to the back surface of the fluorescent lamp, the brightness of the front surface of the fluorescent lamp becomes too high and uneven lighting is likely to occur. It is preferable to leave a part without a reflector on the both sides of the fluorescent lamp, the width of which is about the diameter of the fluorescent lamp, so that it is not necessary to use a light shielding film on the front surface of the fluorescent lamp.

【０００９】 本考案の他の特長は、既設の内照式看板の消費電力の軽減をはかる場合に反射 板の取り付けが極めて容易な点にある。すなわち、反射板に従来の蛍光灯のホル ダーに嵌合する治具を取り付け、蛍光灯を抜いたあとに反射板を装着することに より簡便に改造が可能である。Another feature of the present invention is that it is extremely easy to attach the reflector when the power consumption of the existing internally illuminated signboard is reduced. In other words, it is possible to easily remodel by attaching a jig that fits the holder of the conventional fluorescent lamp to the reflecting plate, and attaching the reflecting plate after removing the fluorescent lamp.

【００１０】[0010]

【実施例】【Example】

以下に本考案の反射板の標準的な寸法関係を実施例により説明するが、これは 従来標準であった２０センチメ−トル間隔の蛍光灯（４０Ｗ，直径３２ミリメ− トル）を４０センチメ−トル間隔にする場合の理想的な例であり、実用上±１５ ％程度の変動は許容される。 The standard dimensional relationship of the reflector of the present invention will be described below by way of examples. This is a conventional standard fluorescent lamp with a spacing of 20 centimeters (40 W, diameter 32 mm) of 40 centimeters. This is an ideal example of setting the interval, and a fluctuation of about ± 15% is practically allowable.

【００１１】 図１において直管蛍光灯の直径Ｄに対し、反射板の山の高さは２Ｄ、山の底辺 の長さは約５Ｄとし、山の両端に設ける水平部の長さは２〜２．５Ｄの範囲が望 ましい。蛍光灯の背面には反射板の存在しない部分を少なくとも２Ｄ、望ましく は３Ｄの範囲で設ける。実施例の蛍光灯の間隔が４０センチメ−トルの場合で、 水平部の長さは約２．２Ｄとした。反射板の位置は隣接する蛍光灯の丁度中央に あって、山の高さの１／２の位置が、２本の蛍光灯の中心を結ぶ線にほぼ一致す る。なお、図１において破線で示した円は不要となった蛍光灯を表わし、そのホ −ルダ−は反射板の装着に利用可能である。In FIG. 1, with respect to the diameter D of the straight tube fluorescent lamp, the height of the crest of the reflector is 2D, the length of the bottom of the crest is about 5D, and the lengths of the horizontal portions provided at both ends of the crest are 2 to 2. A range of 2.5D is desirable. On the back surface of the fluorescent lamp, a portion having no reflector is provided in at least 2D, preferably 3D. In the case where the interval between the fluorescent lamps in the example is 40 cm, the length of the horizontal portion is set to about 2.2D. The position of the reflector is exactly in the center of the adjacent fluorescent lamps, and the half of the height of the mountain almost coincides with the line connecting the centers of the two fluorescent lamps. The circle shown by the broken line in FIG. 1 represents a fluorescent lamp that has become unnecessary, and its holder can be used for mounting a reflector.

【００１２】 上記の反射板の効果を目視および輝度分布の測定によって確認するため以下の 実験を行った。図２に示すごとく箱型のケ−スに４０Ｗ蛍光灯を２０センチメ− トルの間隔で９本並べて装着できるホ−ルダ−を設け、前面は開閉自在の枠に可 橈性の白色半透明シ−トを展張した。The following experiment was conducted in order to confirm the effect of the above reflector by visual observation and measurement of the luminance distribution. As shown in Fig. 2, a box-shaped case was equipped with a holder that allowed 9 40W fluorescent lamps to be installed side by side at an interval of 20 cm, and the front side was a flexible white translucent frame with an openable frame. -Toto was extended.

【００１３】 実施例として、端から奇数番号のホ−ルダ−に４０Ｗ蛍光灯を装着し、偶数番 号のホ−ルダ−の位置に前記の反射板を取り付け、目視で照明むらを観察すると ともに蛍光灯の長さ方向のほぼ中央の位置で白色半透明シ−トの表面の輝度分布 を測定した。比較例として、Ａ全ホ−ルダ−に蛍光灯を装着した場合、Ｂ奇数番 号のホ−ルダ−のみに蛍光灯を装着し、反射板は全くとりつけない場合、および Ｃ奇数番号のホ−ルダ−に蛍光灯を装着し、偶数番号のホ−ルダ−の位置に水平 部を持たない山形の反射板を取り付けた場合のそれぞれにつき目視による照明む ら観察と輝度分布の測定を実施した。表１は実施例および比較例の目視の結果の まとめである。また、図３は同じく輝度分布の測定結果である。As an example, a 40W fluorescent lamp is attached to an odd-numbered holder from the end, the above-mentioned reflector is attached to the position of an even-numbered holder, and the uneven illumination is visually observed. The luminance distribution on the surface of the white translucent sheet was measured at a position approximately in the center of the length of the fluorescent lamp. As a comparative example, when all the A-holders are equipped with fluorescent lights, only the B-odd holders are equipped with fluorescent lights and no reflector is attached, and the C-odd holders are not installed. A fluorescent lamp was attached to the rudder, and a mountain-shaped reflector without a horizontal part was attached to the even-numbered holders. The illumination unevenness was visually observed and the luminance distribution was measured. Table 1 is a summary of the visual results of the examples and comparative examples. Further, FIG. 3 also shows the measurement result of the luminance distribution.

【００１４】 実施例と比較例Ａは目視により照明むらが認めれないが、比較例ＢとＣは照明 むらが視認される。輝度分布曲線で比較例Ａは中央部と両端部との輝度の差が若 干あるが、変化が連続的であるため目視では照明むらに気付かない。実施例は蛍 光灯と蛍光灯の間で輝度曲線に僅かな凹部があるが、これも目視では照明むらを 感じない。これに対し、比較例Ｂは蛍光灯と蛍光灯の間には明瞭な谷が存在し、 目視でも顕著な照明むらが認められる。比較例Ｃは比較例Ｂより全体に輝度が向 上しているものの輝度曲線にはっきりした凹部が存在し、目視でも照明むらが認 められる。Illumination unevenness is not visually recognized in Examples and Comparative Examples A, while illumination unevenness is visually recognized in Comparative Examples B and C. In the luminance distribution curve, Comparative Example A has a slight difference in luminance between the central portion and both end portions, but since the change is continuous, the uneven illumination is not noticed visually. In the embodiment, there is a slight recess in the brightness curve between the fluorescent lamp and the fluorescent lamp, but this also does not cause uneven illumination when visually observed. On the other hand, in Comparative Example B, a clear valley exists between the fluorescent lamps, and noticeable unevenness of illumination is visually recognized. In Comparative Example C, although the luminance is improved as a whole as compared with Comparative Example B, there is a clear concave portion in the luminance curve, and the uneven illumination is visually recognized.

【００１５】 平均輝度は比較例Ａを１００とすると実施例は８１、比較例Ｂは５６、比較例 Ｃは７０であった。２０センチメ−トル間隔で蛍光灯を装置した比較例Ａと比較 して実施例は蛍光灯の間隔は４０センチメ−トルで明るさは約８割あり、反射板 を用いない比較例Ｂと比較して５割近く明るい。The average luminance was 81 in the example, 56 in the comparative example B and 70 in the comparative example C, assuming that the comparative example A was 100. Compared with Comparative Example A in which a fluorescent lamp was installed at a distance of 20 centimeters, the embodiment had a fluorescent lamp interval of 40 centimeters and a brightness of about 80%, and was compared with Comparative Example B using no reflector. About 50% bright.

【００１６】[0016]

【表１】 [Table 1]

【００１７】[0017]

【考案の効果】[Effect of the device]

本考案の反射板を用いることにより、照明むらを生じることなしに従来の内照 式看板の蛍光灯本数を１／２に減らすことができ、設備費、電力代、補修費の節 減が可能となる。また、既設の内照式看板の蛍光灯ホ−ルダ−を利用して反射板 を装着することができ改造が容易である。 By using the reflector of the present invention, it is possible to reduce the number of fluorescent lamps of a conventional internally illuminated signboard by half without causing uneven lighting, and it is possible to reduce equipment costs, electric power costs, and repair costs. Becomes In addition, the reflector can be installed by using the existing fluorescent lamp holder of the internally illuminated signboard, which facilitates modification.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本考案に係る反射板の標準的な寸法関係を説
明する概略断面図である。FIG. 1 is a schematic sectional view illustrating a standard dimensional relationship of a reflector according to the present invention.

【図２】 本考案の実施例及び比較例による内照式看板
の輝度分布曲線である。FIG. 2 is a brightness distribution curve of an internally illuminated signboard according to an example and a comparative example of the present invention.

【図３】 本考案の実施例及び比較例の実験装置の一部
切欠説明図である。FIG. 3 is a partially cutaway explanatory view of an experimental device of an example of the present invention and a comparative example.

【符号の説明】[Explanation of symbols]

１ 直管蛍光灯 ２ 反射板 ３ 反射板の山形部 ４ 反射板の水平部 ５ 半透明シ−ト ６ ケ−ス ７ 輝度計 ８ 自記記録計 1 straight tube fluorescent lamp 2 reflector plate 3 chevron portion of reflector plate 4 horizontal portion of reflector plate 5 semi-transparent sheet 6 case 7 luminance meter 8 self-recording recorder

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 一面に開口を有する薄い箱状のケース
と、このケース内に一定の間隔で平行に配置された複数
の直管状光源と、隣接する直管状光源の中間に直管状光
源と平行に設置された反射板と、開口面に展張された表
面に文字・画面等の標識を有する半透明シートからなる
内照式看板において、反射板は反射面が白色半光沢であ
り、その長さが直管状光源にほぼ等しく、かつ断面は両
側に水平部を有する山形であることを特徴とする内照式
看板。1. A thin box-shaped case having an opening on one surface, a plurality of straight tube light sources arranged in parallel in the case at regular intervals, and a straight tube light source in the middle of adjacent straight tube light sources. In an internally illuminated signboard that consists of a reflector installed on the screen and a semi-transparent sheet that has signs such as letters and screens on the surface extended to the opening, the reflector has a white semi-gloss reflective surface and its length. Is almost equal to a straight-tube light source, and the cross-section is a mountain shape with horizontal portions on both sides.