JP2019110045A

JP2019110045A - Lighting device

Info

Publication number: JP2019110045A
Application number: JP2017242735A
Authority: JP
Inventors: 匡男嶋本; Masao Shimamoto
Original assignee: SHIMATEC KK
Current assignee: SHIMATEC KK
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2019-07-04

Abstract

To provide an eye-friendly LED lighting device suitable for a visual check.SOLUTION: A lighting device 10 includes: a case of metal which is entirely ring-shaped and which has an open surface of a cross section on a side opposite to a lighting direction; a printed wiring board of a ring-like shape which is firmly attached to an opening part of the case and which has a top surface loaded with light-emitting diodes of a plurality of colors; a domed cover which has a central portion provided with an opening part and which is firmly attached to an outer side of a top part of the ring-shaped case in a manner such as to cover the printed wiring board; and a constant current power supply device which is capable of independently setting respective current values of the light-emitting diodes of the plurality of colors at desired values. The lighting device 10 is eye-friendly even under long time use and is suitable for a visual check.SELECTED DRAWING: Figure 1

Description

本発明は照明装置に関するものであり、特に、目視検査に好適な発光ダイオード（以下、ＬＥＤとも記す）照明装置に関するものである。 The present invention relates to a lighting device, and more particularly to a light emitting diode (hereinafter also referred to as LED) lighting device suitable for visual inspection.

従来、例えば製品のラベル検査、部品表面検査、錠剤検査などに使用される照明装置が各種提案されている。下記の特許文献１には、本発明者が発明したＬＥＤ照明装置が開示されている。このＬＥＤ照明装置は、中央部に貫通孔を備えた略ドーナツ状である基台と、基台の内側に装着され、主に基台の中心軸と平行な方向に光を照射するために複数のＬＥＤ素子が装着され、中央部に貫通孔を備えた円盤状の印刷配線基板と、基台の内側に装着され、印刷配線基板を覆い、断面が円弧状である略ドーナツ状のカバーとを備える。従来の照明装置より光の照射角度の広い範囲を同時に照明可能である。 Conventionally, various lighting devices used for, for example, label inspection of products, part surface inspection, tablet inspection, etc. have been proposed. Patent Document 1 below discloses an LED lighting device invented by the present inventor. The LED lighting device is mounted in the base having a substantially donut shape with a through hole at the center and inside the base, and a plurality of light emitting devices are mainly irradiated in a direction parallel to the central axis of the base. The LED element is mounted on a disk-like printed wiring board having a through hole at the center, and a substantially donut shaped cover mounted on the inside of the base and covering the printed wiring board and having an arc-shaped cross section Prepare. A wider range of light illumination angles can be illuminated simultaneously than conventional lighting devices.

特開２０１２−１０４２９６号公報JP 2012-104296 A

上記した従来の照明装置においては、カメラによる撮影用に設計されているために、目視検査に長時間使用すると目が疲れるという問題点があった。
本発明は、上記した課題を解決し、目視検査に好適な目に優しいＬＥＤ照明装置を提供することを目的とする。 The above-described conventional lighting device is designed for photographing by a camera, and therefore, there is a problem that the eyes become tired when used for a long time for visual inspection.
An object of the present invention is to solve the problems described above and to provide an eye-friendly LED lighting device suitable for visual inspection.

本発明の照明装置は、全体がリング状で、断面の照明方向とは逆側の面が開口されている金属製のケースと、前記ケースの開口部に固着され、上面に複数色の発光ダイオードが搭載されたリング状の印刷配線基板と、中央部分に開口部が設けられ、前記印刷配線基板を覆うように、リング状の前記ケースの上部の外側に固着されたドーム状カバーと、複数色の前記発光ダイオードのそれぞれの電流値を独立して任意の値に設定可能な定電流電源装置とを備えたことを主要な特徴とする。 The lighting device according to the present invention has a ring-like shape as a whole, and a metal case which is open on the side opposite to the illumination direction of the cross section, and fixed to the opening of the case, and has a plurality of light emitting diodes A ring-shaped printed wiring board mounted thereon, a dome-shaped cover fixed to the outside of the upper portion of the ring-shaped case so as to cover the printed wiring board, and a plurality of colors The present invention is mainly characterized in that it comprises: a constant current power supply device capable of independently setting the current value of each of the light emitting diodes of any of the above.

また、前記した照明装置において、前記ドーム状カバーの材質が一部の光を透過する白い樹脂製である点にも特徴がある。また、前記した照明装置において、前記発光ダイオードの発行色は白色、オレンジ色、青色の３種類である点にも特徴がある。 In the above-described lighting device, it is also characterized in that the material of the dome-shaped cover is made of a white resin which transmits a part of light. In addition, in the above-described lighting device, the light emitting diode is characterized in that the emission color of the light emitting diode is three types of white, orange and blue.

本発明の照明装置は上記したような特徴によって、以下のような効果がある。
（１）白色を基調とし、演色から昼光色まで（色温度３５００ケルビンから７０００ケルビン）自由に調節ができるので、長時間目視検査を行う上で目に優しく疲れない。
（２）照明装置の上部にも一部の光が照射されるので、照明装置の中央の開口部を覗き込む場合に、周辺の照明装置の上部が照明光と同様の色で光るので中央部分と周辺部分のコントラストが弱くなり、目が疲れない。かつ、照明光の色が容易に確認できる。 The lighting device of the present invention has the following effects due to the features described above.
(1) It is based on white color and can be freely adjusted from color rendering to daylight color (color temperature from 3500 kelvin to 7,000 kelvin), so it does not get tired gently on the eyes when performing long-term visual inspection.
(2) Since a part of light is irradiated also to the upper part of the lighting device, when looking into the central opening of the lighting device, the upper part of the peripheral lighting device glows with the same color as the illumination light, so the central part And the contrast of the surrounding area becomes weak and the eyes do not get tired. And, the color of the illumination light can be easily confirmed.

（３）照明装置を反転させて対象物の裏側から照明することによって透過光による検査が可能。
（４）光をある程度透過する白色のドーム状カバーを用いているので、従来の照明装置より照明むらが減少し、光の照射角度の広い範囲を同時に照明可能である。 (3) The inspection by transmitted light is possible by inverting the illumination device and illuminating from the back side of the object.
(4) Since a white dome-like cover that transmits light to a certain extent is used, illumination unevenness is reduced compared to the conventional illumination device, and a wide range of light irradiation angles can be illuminated simultaneously.

図１は本発明の照明装置を使用した目視検査装置の構成を示す正面図である。FIG. 1 is a front view showing the configuration of a visual inspection apparatus using the lighting device of the present invention. 図２は本発明の照明装置の構成を示す平面図および断面図である。FIG. 2 is a plan view and a cross-sectional view showing the configuration of the lighting device of the present invention. 図３は本発明の照明装置における光の経路を示す説明図である。FIG. 3 is an explanatory view showing a light path in the lighting device of the present invention.

以下実施例について図面を参照して説明する。 Hereinafter, embodiments will be described with reference to the drawings.

図１は、本発明の照明装置を使用した目視検査装置の構成を示す正面図である。この目視検査装置は、支持装置１５に上下移動可能であり、任意の高さで固着可能に支持されたＬＥＤ照明装置１０、検査対象物１２を載せた対象物搭載板１３、ルーペ（拡大鏡）１４および電源ケーブル２５によって照明装置１０と接続された電源装置１１を含む。 FIG. 1 is a front view showing the configuration of a visual inspection apparatus using the lighting device of the present invention. The visual inspection apparatus is vertically movable on the support device 15, and is provided with an LED illumination device 10 supported so as to be fixed at an arbitrary height, an object mounting plate 13 on which an inspection object 12 is placed, and a loupe (magnifying glass) And a power supply 11 connected to the lighting apparatus 10 by a power cable 25.

電源装置１１は３色のＬＥＤ２２のそれぞれの電流値を独立してオンオフおよび任意の値に設定可能な定電流電源装置である。また、設定した電流値をプリセット（記憶）し、再現可能である。使用者は、所望の色（色温度）になるように電源装置１１を設定して照明を点灯し、ＬＥＤ照明装置１０の中央の開口部から検査対象物１２を覗き込むことによって目視検査を行う。 The power supply device 11 is a constant current power supply device capable of independently setting the current value of each of the three color LEDs 22 to on / off and an arbitrary value. Moreover, the set current value can be preset (stored) and reproduced. The user sets the power supply device 11 to a desired color (color temperature) to turn on the illumination, and performs visual inspection by looking into the inspection object 12 from the central opening of the LED illumination device 10 .

なお、支持装置１５を外して検査対象物１２を手で把持してもよいし、ベルトコンベアやロボットアームなどを使用して検査対象物１２を移動させてもよい。また、ルーペ１４は必要に応じて着脱すればよい。更に透過光で目視検査を行う場合には、ＬＥＤ照明装置１０と検査対象物１２を載せた対象物搭載板１３の位置を交換し、ＬＥＤ照明装置１０が上方を照明するように上向きにし、透明な対象物搭載板１３を用いる。 The support device 15 may be removed and the inspection object 12 may be gripped by hand, or the inspection object 12 may be moved using a belt conveyor, a robot arm, or the like. The loupe 14 may be attached and detached as required. Further, when visual inspection is performed with transmitted light, the position of the object mounting plate 13 on which the LED lighting device 10 and the inspection object 12 are placed is exchanged, and the LED lighting device 10 is directed upward to illuminate upward. The object mounting plate 13 is used.

図２は、本発明の照明装置の構成を示す平面図および断面図である。リング状ケース２０は例えば全体がリング状（ドーナツ状）で、図２に図示された断面の上面（照明方向とは逆側の面）が開口されている金属製のケースであり、この上面には複数のＬＥＤ２２が搭載されたリング状の印刷配線基板２３が固着されている。また、リング状ケース２２の上部の外側にはドーム状カバー２１が固着されている。 FIG. 2 is a plan view and a sectional view showing the configuration of the lighting device of the present invention. The ring-shaped case 20 is, for example, a metal case in which the whole is ring-shaped (donut-shaped) and the upper surface of the cross section shown in FIG. 2 (surface opposite to the illumination direction) is opened. A ring-shaped printed wiring board 23 on which a plurality of LEDs 22 are mounted is fixed. Further, a dome-shaped cover 21 is fixed to the outside of the upper portion of the ring-shaped case 22.

印刷配線基板２３上に固着されたＬＥＤ２２は白色、オレンジ色、青色の３種類のＬＥＤからなり、それぞれの色のＬＥＤ素子が順に等間隔に配置されている。そして、印刷配線によって形成されたそれぞれの色のＬＥＤの直列回路は電源ケーブル２５によってそれぞれ独立して電源装置１１に接続されている。白色、オレンジ色、青色のＬＥＤを使用することにより、様々な色温度の色をより忠実に再現可能である。 The LEDs 22 fixed on the printed wiring board 23 are composed of three types of LEDs of white, orange and blue, and LED elements of the respective colors are arranged in order at equal intervals. The series circuit of the LEDs of the respective colors formed by the printed wiring is independently connected to the power supply 11 by the power cable 25. By using white, orange and blue LEDs, colors of various color temperatures can be reproduced more faithfully.

ドーム状カバー２１は、上部から見ると中央部に使用者が覗き込むための開口部２４が設けられた円形であり、断面がほぼ楕円形を半分に切断した形状である。材質は白色あるいは乳白色の樹脂製であり、光をある程度だけ透過する。ドーム状カバー２１の内面や外面には光を反射あるいは遮光するような塗装などは施されていない。 The dome-like cover 21 is a circular shape provided with an opening 24 for a user to look into at a central portion when viewed from the top, and has a shape obtained by cutting a substantially elliptical cross section in half. The material is made of white or milky white resin, and transmits light to some extent. The inner surface and the outer surface of the dome-like cover 21 are not coated to reflect or block light.

図３は、本発明の照明装置における光の経路を示す説明図である。ＬＥＤ２２から照射された光の一部はドーム状カバー２１の内部表面で全反射あるいは乱反射するほか、カバー２１を形成する樹脂の内部へも進入し、内部でも乱反射する。更に一部の光はカバー２１の外側（ＬＥＤ２２と反対側）へ透過する。 FIG. 3 is an explanatory view showing a light path in the lighting device of the present invention. A part of the light emitted from the LED 22 is totally or irregularly reflected by the inner surface of the dome-like cover 21 and also enters the inside of the resin forming the cover 21 and is also irregularly reflected inside. Further, part of the light is transmitted to the outside of the cover 21 (opposite to the LED 22).

光がドーム状カバー２１の内面や内部の各所で乱反射するので、光が様々な方向から検査対象物１２にとどくことになる。従って、従来の照明装置より照明むらが減少し、光の照射角度の広い範囲を同時に照明可能である。
また、照明装置１０の上部にも一部の光が照射されるので、使用者が照明装置１０の中央の開口部を覗き込む場合に、照明装置１０の上部が照明光と同様の色で光るので中央部分とのコントラストが弱くなり、かつ照明光の色が容易に確認できる。 Since the light is irregularly reflected on the inner surface of the dome-like cover 21 and at various places inside the dome-like cover 21, the light travels to the inspection object 12 from various directions. Therefore, uneven illumination is reduced as compared with the conventional illumination device, and a wide range of illumination angles of light can be illuminated simultaneously.
Moreover, since a part of light is irradiated also to the upper part of the illumination device 10, when the user looks into the central opening of the illumination device 10, the upper part of the illumination device 10 glows with the same color as the illumination light Therefore, the contrast with the central portion is weakened, and the color of the illumination light can be easily confirmed.

以上、実施例について説明したが、本発明においては以下のような変形例も考えられる。実施例においてはカバーの断面が楕円形の一部であるような構成を開示したが、カバーの形状は、断面が角の丸い四角形の一部、あるいは台形状であってもよい。 As mentioned above, although an Example was described, the following modifications are also considered in this invention. Although the embodiment discloses the configuration in which the cross section of the cover is a part of an ellipse, the shape of the cover may be a part of a square with rounded corners or a trapezoidal shape.

実施例においては本発明を目視用の照明装置に適用した例を開示したが、本発明の照明装置は任意の用途の照明装置に適用可能である。 Although the example which applied this invention to the illuminating device for visual observation was disclosed in the Example, the illuminating device of this invention is applicable to the illuminating device of any use.

１０…ＬＥＤ照明装置
１１…電源装置
１２…検査対象物
１３…対象物搭載版
１４…ルーペ
１５…支持装置
２５…電源ケーブル DESCRIPTION OF SYMBOLS 10 ... LED lighting apparatus 11 ... Power supply apparatus 12 ... Inspection target object 13 ... Target object mounting version 14 ... Loupe 15 ... Support apparatus 25 ... Power supply cable

Claims

A metal case that is entirely ring-shaped and has a surface opposite to the illumination direction of the cross section open;
A ring-shaped printed wiring board fixed to the opening of the case and having light emitting diodes of a plurality of colors mounted on the upper surface thereof;
A dome-shaped cover provided with an opening in a central portion and fixed to the outside of the upper portion of the ring-shaped case so as to cover the printed wiring board;
What is claimed is: 1. A lighting device comprising: a constant current power supply device capable of independently setting current values of the light emitting diodes of a plurality of colors to arbitrary values.

The lighting device according to claim 1, wherein a material of the dome-shaped cover is made of white resin that transmits a part of light.

The lighting device according to claim 2, wherein the light emitting diode has three types of emitted color: white, orange and blue.