JP7048095B2

JP7048095B2 - Detector

Info

Publication number: JP7048095B2
Application number: JP2018190742A
Authority: JP
Inventors: 好徳渡邉; 伊織西田
Original assignee: 株式会社マーキス
Priority date: 2018-10-09
Filing date: 2018-10-09
Publication date: 2022-04-05
Anticipated expiration: 2038-10-09
Also published as: JP2020060405A

Description

本発明は、壁材の裏側に配置される配線ボックスを当該壁材の表側から非接触で探知する探知装置に関する。 The present invention relates to a detection device that detects a wiring box arranged on the back side of a wall material from the front side of the wall material in a non-contact manner.

住宅やビルなどにおいて、石膏ボード等の壁材の裏側には、電源線、通信線及び電話線等を配線しておくための配線ボックスが、壁材の施工前に設置されている。壁材の施工後に、壁材の裏側にある配線ボックスを壁材の表側から探知出来るようにする手段として、前面側（壁材側）の上下にアルミ箔等の金属板７、７を配置する構成が知られている（特許文献１）。 In a house or a building, a wiring box for wiring a power line, a communication line, a telephone line, or the like is installed on the back side of a wall material such as gypsum board before the wall material is constructed. After the wall material is installed, metal plates 7 and 7 such as aluminum foil are placed above and below the front side (wall material side) as a means to detect the wiring box on the back side of the wall material from the front side of the wall material. The configuration is known (Patent Document 1).

この種の配線ボックスを壁材の表側から探知する従来の探知装置は、壁材に当接する前面の上部と下部に、配線ボックスに付加される金属板の間隔に相当する距離離れて金属センサを配置した構成からなる。ユーザは、この探知装置を壁材に密着させるようにして壁材に沿って上下及び左右に移動させる。その移動の間に、両金属センサが近くの金属を検知すると、探知装置は、発光素子及び／または発音素子で発光／発音する。 A conventional detector that detects this type of wiring box from the front side of the wall material has metal sensors at the top and bottom of the front surface that abuts on the wall material at a distance corresponding to the distance between the metal plates attached to the wiring box. It consists of an arranged configuration. The user moves the detector up and down and left and right along the wall material so as to be in close contact with the wall material. During the movement, if both metal sensors detect nearby metal, the detector emits / sounds at the light emitting element and / or the sounding element.

特開２００５－１４３２０８号公報Japanese Unexamined Patent Publication No. 2005-143208

従来の構成では、壁材の裏側に配置される配線ボックスの存在を上下方向では正確に探知できる。しかし、水平方向では、配線ボックスの金属板の横幅のどの位置でも金属センサが反応することから、水平方向の位置を正確には探知出来ないという問題がある。 In the conventional configuration, the existence of the wiring box arranged on the back side of the wall material can be accurately detected in the vertical direction. However, in the horizontal direction, since the metal sensor reacts at any position of the width of the metal plate of the wiring box, there is a problem that the horizontal position cannot be detected accurately.

本発明は、このような問題点を解決し、水平方向についても壁材裏側の配線ボックスを位置精度良く探知出来る探知装置を提示することを目的とする。 An object of the present invention is to solve such a problem and to present a detection device capable of detecting a wiring box on the back side of a wall material with high positional accuracy even in a horizontal direction.

本発明に係る探知装置は、壁材の裏側に配置される配線ボックスであって、当該壁材に向かう面の上側に第１の金属板を、下側に第２の金属板を配置された配線ボックスを、当該壁材の表側から非接触で探知する探知装置であって、当該第１及び第２の金属板の一方の横幅に相当する距離だけ横方向に離れて配置される第１及び第２の金属センサと、当該第１及び第２の金属センサのそれぞれから等距離の位置に配置される第３の金属センサであって、当該第１の金属板と当該第２の金属板との間の距離に相当する距離だけ、当該第１及び第２の金属センサから上下方向に離れて配置される第３の金属センサと、当該第１、第２及び第３の金属センサが金属検出状態を同時に示していることを判定する判定手段と、当該判定手段の判定結果に従い、当該配線ボックスの中央の探知をユーザに通知する中央通知手段とを有し、当該判定手段が、当該第１及び第２の金属センサのセンサ出力を加算する加算手段と、当該第３の金属センサの出力を金属検出閾値と比較することにより、当該第３の金属センサが当該金属検出状態か否かを判定する第１の比較手段と、当該加算手段の出力を中央判定閾値と比較することにより、当該第１及び第２の金属センサが同時に当該金属検出状態にあるか否かを判定する第２の比較手段と、当該第１及び第２の比較手段の比較結果に従い、当該第１、第２及び第３の金属センサが同時に当該金属検出状態にある場合に、当該中央通知手段に当該配線ボックスの中央の探知をユーザに通知させる制御手段とを有することを特徴とする。
本発明に係る探知装置はまた、壁材の裏側に配置される配線ボックスであって、当該壁材に向かう面の上側に第１の金属板を、下側に第２の金属板を配置された配線ボックスを、当該壁材の表側から非接触で探知する探知装置であって、当該第１及び第２の金属板の一方の横幅に相当する距離だけ横方向に離れて配置される第１及び第２の金属センサと、当該第１及び第２の金属センサのそれぞれから等距離の位置に配置される第３の金属センサであって、当該第１の金属板と当該第２の金属板との間の距離に相当する距離だけ、当該第１及び第２の金属センサから上下方向に離れて配置される第３の金属センサと、当該第１、第２及び第３の金属センサが金属検出状態を同時に示していることを判定する判定手段と、当該判定手段の判定結果に従い、当該配線ボックスの中央の探知をユーザに通知する中央通知手段とを有し、当該判定手段が、当該第１及び第２の金属センサのセンサ出力を加算する加算手段と、当該第１、第２及び第３の金属センサの出力を金属検出閾値と比較することにより、当該第１、第２及び第３の金属センサのそれぞれが当該金属検出状態か否かを判定する比較手段と、当該比較手段の比較結果に従い、当該第１、第２及び第３の金属センサが同時に当該金属検出状態にある場合に、当該中央通知手段に当該配線ボックスの中央の探知をユーザに通知させる制御手段とを有することを特徴とする。 The detection device according to the present invention is a wiring box arranged on the back side of the wall material, in which the first metal plate is arranged on the upper side of the surface facing the wall material and the second metal plate is arranged on the lower side. A first and second detection device that detects the wiring box from the front side of the wall material in a non-contact manner, and is arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates. A second metal sensor and a third metal sensor located at equal distances from each of the first and second metal sensors, the first metal plate and the second metal plate. The third metal sensor and the first, second, and third metal sensors, which are arranged vertically apart from the first and second metal sensors by a distance corresponding to the distance between them, detect metal. It has a determination means for determining that the states are simultaneously indicated, and a central notification means for notifying the user of the detection of the center of the wiring box according to the determination result of the determination means , and the determination means is the first. And by comparing the output of the third metal sensor with the metal detection threshold and the addition means for adding the sensor output of the second metal sensor, it is determined whether or not the third metal sensor is in the metal detection state. A second comparison for determining whether or not the first and second metal sensors are in the metal detection state at the same time by comparing the output of the first comparison means and the addition means with the central determination threshold value. According to the comparison result between the means and the first and second comparison means, when the first, second and third metal sensors are in the metal detection state at the same time, the central notification means is in the center of the wiring box. It is characterized by having a control means for notifying the user of the detection of .
The detection device according to the present invention is also a wiring box arranged on the back side of the wall material, in which the first metal plate is arranged on the upper side of the surface facing the wall material and the second metal plate is arranged on the lower side. A first detection device that detects the wiring box from the front side of the wall material in a non-contact manner, and is arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates. And a second metal sensor and a third metal sensor located at equal distances from each of the first and second metal sensors, the first metal plate and the second metal plate. A third metal sensor arranged vertically away from the first and second metal sensors by a distance corresponding to the distance between the metal and the first, second, and third metal sensors are made of metal. It has a determination means for determining that the detection state is simultaneously indicated, and a central notification means for notifying the user of the detection of the center of the wiring box according to the determination result of the determination means, and the determination means is the first. By comparing the output of the first, second and third metal sensors with the metal detection threshold with the addition means for adding the sensor outputs of the first and second metal sensors, the first, second and third When the first, second, and third metal sensors are simultaneously in the metal detection state according to the comparison result of the comparison means for determining whether or not each of the metal sensors in the metal sensor is in the metal detection state. It is characterized in that the central notification means has a control means for notifying the user of the detection of the center of the wiring box.

本発明に係る探知装置はまた、壁材の裏側に配置される配線ボックスであって、当該壁材に向かう面の上側に第１の金属板を、下側に第２の金属板を配置された配線ボックスを、当該壁材の表側から非接触で探知する探知装置であって、当該第１及び第２の金属板の一方の横幅に相当する距離だけ横方向に離れて配置される第１及び第２の金属センサと、当該第１及び第２の金属板の他方の横幅に相当する距離だけ横方向に離れて配置される第３及び第４の金属センサであって、当該第１の金属板と当該第２の金属板との間の距離に相当する距離だけ、当該第１及び第２の金属センサから上下方向に離れて配置される第３及び第４の金属センサと、当該第１、第２、第３及び第４の金属センサが金属検出状態を同時に示していることを判定する判定手段と、当該判定手段の判定結果に従い、当該配線ボックスの中央の探知をユーザに通知する中央通知手段とを有し、当該判定手段が、当該第１及び第２の金属センサのセンサ出力を加算する第１の加算手段と、当該第３及び第４の金属センサのセンサ出力を加算する第２の加算手段と、当該第１及び第２の加算手段の出力を加算する第３の加算手段と、当該第１の加算手段の出力を閾値と比較することにより、当該第１及び第２の金属センサの両方が当該金属検出状態にあるか否かを判定する第１の比較手段と、当該第２の加算手段の出力を閾値と比較することにより、当該第３及び第４の金属センサの両方が当該金属検出状態にあるか否かを判定する第２の比較手段と、当該第１及び第２の比較手段の比較結果に従い、当該第１、第２、第３及び第４の金属センサが同時に当該金属検出状態にある場合に、当該中央通知手段に当該配線ボックスの中央の探知をユーザに通知させる制御手段とを有することを特徴とする。
本発明に係る探知装置はまた、壁材の裏側に配置される配線ボックスであって、当該壁材に向かう面の上側に第１の金属板を、下側に第２の金属板を配置された配線ボックスを、当該壁材の表側から非接触で探知する探知装置であって、当該第１及び第２の金属板の一方の横幅に相当する距離だけ横方向に離れて配置される第１及び第２の金属センサと、当該第１及び第２の金属板の他方の横幅に相当する距離だけ横方向に離れて配置される第３及び第４の金属センサであって、当該第１の金属板と当該第２の金属板との間の距離に相当する距離だけ、当該第１及び第２の金属センサから上下方向に離れて配置される第３及び第４の金属センサと、当該第１、第２、第３及び第４の金属センサが金属検出状態を同時に示していることを判定する判定手段と、当該判定手段の判定結果に従い、当該配線ボックスの中央の探知をユーザに通知する中央通知手段とを有し、当該判定手段が、当該第１、第２、第３及び第４の金属センサのセンサ出力を加算する加算手段と、当該第１、第２、第３及び第４の金属センサの出力を金属検出閾値と比較することにより、当該第１、第２、第３及び第４の金属センサのそれぞれが当該金属検出状態か否かを判定する比較手段と、当該比較手段の比較結果に従い、当該第１、第２、第３及び第４の金属センサが同時に当該金属検出状態にある場合に、当該中央通知手段に当該配線ボックスの中央の探知をユーザに通知させる制御手段とを有することを特徴とする。 The detection device according to the present invention is also a wiring box arranged on the back side of the wall material, in which the first metal plate is arranged on the upper side of the surface facing the wall material and the second metal plate is arranged on the lower side. A first detection device that detects the wiring box from the front side of the wall material in a non-contact manner, and is arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates. And the second metal sensor and the third and fourth metal sensors arranged laterally apart by a distance corresponding to the width of the other of the first and second metal plates, the first of which. The third and fourth metal sensors arranged vertically apart from the first and second metal sensors by a distance corresponding to the distance between the metal plate and the second metal plate, and the first metal sensor. According to the determination means for determining that the first, second, third and fourth metal sensors simultaneously indicate the metal detection state and the determination result of the determination means, the user is notified of the detection in the center of the wiring box. It has a central notification means, and the determination means adds the sensor outputs of the first and second metal sensors to the first adding means for adding the sensor outputs of the first and second metal sensors, and the sensor outputs of the third and fourth metal sensors. By comparing the output of the second adding means, the third adding means for adding the outputs of the first and second adding means, and the output of the first adding means with the threshold value, the first and second adding means are compared. The third and fourth metal sensors by comparing the output of the first comparison means for determining whether or not both of the metal sensors of the above are in the metal detection state and the output of the second addition means with the threshold value. According to the comparison result of the second comparison means for determining whether or not both of the above are in the metal detection state and the first and second comparison means, the first, second, third and fourth metals It is characterized by having a control means for causing the central notification means to notify the user of the detection of the center of the wiring box when the sensor is in the metal detection state at the same time .
The detection device according to the present invention is also a wiring box arranged on the back side of the wall material, in which the first metal plate is arranged on the upper side of the surface facing the wall material and the second metal plate is arranged on the lower side. A first detection device that detects the wiring box from the front side of the wall material in a non-contact manner, and is arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates. And the second metal sensor and the third and fourth metal sensors arranged laterally apart by a distance corresponding to the width of the other of the first and second metal plates, the first of which. The third and fourth metal sensors arranged vertically apart from the first and second metal sensors by a distance corresponding to the distance between the metal plate and the second metal plate, and the first metal sensor. According to the determination means for determining that the first, second, third and fourth metal sensors simultaneously indicate the metal detection state and the determination result of the determination means, the user is notified of the detection in the center of the wiring box. It has a central notification means, and the determination means includes an addition means for adding the sensor outputs of the first, second, third and fourth metal sensors, and the first, second, third and fourth. A comparison means for determining whether or not each of the first, second, third, and fourth metal sensors is in the metal detection state by comparing the output of the metal sensor with the metal detection threshold, and the comparison means. When the first, second, third and fourth metal sensors are in the metal detection state at the same time according to the comparison result of, the control means for causing the central notification means to notify the user of the detection of the center of the wiring box. It is characterized by having and.

本発明によれば、壁材の裏側に配置される配線ボックスを、壁材の表側から非接触で精度良く探知することができる。 According to the present invention, the wiring box arranged on the back side of the wall material can be detected accurately from the front side of the wall material without contact.

本発明の一実施例の外観斜視図である。It is an external perspective view of one Example of this invention. 本実施例の（ａ）平面図、側面図（ｂ）側面図及び（ｃ）背面図である。It is (a) plan view, side view (b) side view and (c) rear view of this Example. 壁材裏の配線ボックスの中心をマークするときの本実施例の側面図である。It is a side view of this Example at the time of marking the center of the wiring box on the back of a wall material. 本実施例の金属センサ出力の処理回路例の概略構成ブロック図である。It is a schematic block diagram of the processing circuit example of the metal sensor output of this Example. 金属センサ出力の変化例である。This is an example of changes in metal sensor output. 本実施例の金属センサ出力波形例と合成波形例である。It is an example of a metal sensor output waveform and an example of a composite waveform of this Example. 実施例２の正面図と背面図を示す。The front view and the back view of Example 2 are shown. 実施例２の金属センサ出力の処理回路例の概略構成ブロック図である。It is a schematic block diagram of the processing circuit example of the metal sensor output of Example 2. FIG.

以下、図面を参照して、本発明の実施例を詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明に係る探知装置の一実施例に外観斜視図を示し、図２（ａ）はその実施例の平面図、図２（ｂ）は側面図、図２（ｃ）は背面図をそれぞれ示す。 1A and 1B show an external perspective view of an embodiment of the detection device according to the present invention, FIG. 2A is a plan view of the embodiment, FIG. 2B is a side view, and FIG. 2C is a back surface. The figures are shown respectively.

図示する探知装置１０は、上側ユニット１２と下側ユニット１４の前側を対面板１６で固定され、後側を支柱１８で固定されている。上側ユニット１２の前面の左右に金属センサ２０ＵＲ，２０ＵＬが配置され、下側ユニットの前面の中央にも金属センサ２０Ｄが配置されている。金属センサ２０ＵＲ，２０ＵＬ，２０Ｄが、金属センサ２０Ｄが頂点となり、金属センサ２０ＵＲ，２０ＵＬを底辺となる二等辺三角形を構成する。 In the illustrated detection device 10, the front side of the upper unit 12 and the lower unit 14 is fixed by a facing plate 16, and the rear side is fixed by a support column 18. Metal sensors 20UR and 20UL are arranged on the left and right sides of the front surface of the upper unit 12, and metal sensors 20D are also arranged in the center of the front surface of the lower unit. The metal sensors 20UR, 20UL, 20D form an isosceles triangle with the metal sensor 20D at the apex and the metal sensors 20UR, 20UL at the base.

対面板１６及び支柱１８の高さは、金属センサ２０ＵＲ，２０ＵＬが探知対象の配線ボックスに付着される上側（または下側）の金属板（本実施例ではアルミ箔）を検出するとき、金属センサ２０Ｄが当該配線ボックスの下側（または上側）の金属板（本実施例ではアルミ箔）を同時に検出するサイズに設定されている。金属センサ２０ＵＲ，２０ＵＬの間隔は、理由は後述するが、同時に配線ボックスの上側または下側の同じ金属板（本実施例ではアルミ箔）を検知出来るように、その金属板の幅相当に設定されている。 The height of the facing plate 16 and the column 18 is the metal sensor when the metal sensors 20UR and 20UL detect the upper (or lower) metal plate (aluminum foil in this embodiment ) attached to the wiring box to be detected. 20D is set to a size that simultaneously detects a metal plate (aluminum foil in this embodiment ) on the lower side (or upper side) of the wiring box. The distance between the metal sensors 20UR and 20UL is set to correspond to the width of the metal plate so that the same metal plate (aluminum foil in this embodiment) on the upper side or the lower side of the wiring box can be detected at the same time, although the reason will be described later. ing.

上側ユニット１２の背面には、図２（ｃ）に示すように、金属探知状態をユーザに通知する通知手段としての４つのＬＥＤ（発光ダイオード）２２ＵＲ，２２ＵＬ，２２Ｄ，２２Ｃが配置されている。ＬＥＤ２２ＵＲ，２２ＵＬ，２２Ｄは、対応する金属センサ２０ＵＲ，２０ＵＬ，２０Ｄと同様の位置関係で配置され、ＬＥＤ２２Ｃが、ＬＥＤ２２ＵＲ，２２ＵＬの中間に配置されている。上右ＬＥＤ２２ＵＲは、金属センサ２０ＵＲが壁材裏側の金属を探知したときに点灯する。上左ＬＥＤ２２ＵＬは、金属センサ２０ＵＬが壁材裏側の金属を探知したときに点灯する。下ＬＥＤ２２Ｄは、金属センサ２０Ｄが壁材裏側の金属を探知したときに点灯する。中央ＬＥＤ２２Ｃは、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄの検出結果により、壁材裏側の配線ボックスの中央を探知したときに、点灯する。金属センサ２０ＵＲ，２０ＵＬ，２０Ｄの作用の詳細は、後述する。 As shown in FIG. 2C, four LEDs (light emitting diodes) 22UR, 22UL, 22D, and 22C are arranged on the back surface of the upper unit 12 as notification means for notifying the user of the metal detection state. The LEDs 22UR, 22UL, 22D are arranged in the same positional relationship as the corresponding metal sensors 20UR, 20UL, 20D, and the LED 22C is arranged in the middle of the LEDs 22UR, 22UL. The upper right LED 22UR lights up when the metal sensor 20UR detects the metal on the back side of the wall material. The upper left LED 22UL lights up when the metal sensor 20UL detects the metal on the back side of the wall material. The lower LED 22D lights up when the metal sensor 20D detects the metal on the back side of the wall material. The central LED 22C lights up when the center of the wiring box on the back side of the wall material is detected by the detection results of the metal sensors 20UR, 20UL, 20D. Details of the operation of the metal sensors 20UR, 20UL, 20D will be described later.

探知装置１０は、壁材の裏側に設置された配線ボックスを探知したときに、その中心位置にマークを塗布するマーク塗布棒２４を有する。マーク塗布棒２４の先端にはインク含浸スポンジ２６が設置されており、後端は、支柱１８の背後に配置される可動部材２８に固定されている。マーク塗布棒２４は、支柱１８の貫通孔３０を貫通している。図２（ｂ）に示すように、可動部材２８の、支柱１８に向けて植立したガイドピン３２，３４が、支柱１８の対応する位置に開けたガイド孔３６，３８に挿入しており、この構成により、可動部材２８は、支柱１８に接近し離反する方向に移動可能である。ガイドピン３２，３４には、可動部材２８を支柱１８から離れる方向に付勢するコイルスプリング４０，４２を被せてある。図示していないが、可動部材２８が一定距離以上、支柱１８から離れないようにするストッパを上部ユニット１２及び下部ユニット１４に設けてあり、これにより、可動部材２８の探知装置１０からの脱落を防止している。 The detection device 10 has a mark application rod 24 that applies a mark to the center position of the wiring box installed on the back side of the wall material when it is detected. An ink-impregnated sponge 26 is installed at the tip of the mark application rod 24, and the rear end is fixed to a movable member 28 arranged behind the support column 18. The mark application rod 24 penetrates the through hole 30 of the support column 18. As shown in FIG. 2B, the guide pins 32, 34 of the movable member 28 planted toward the support column 18 are inserted into the guide holes 36, 38 formed at the corresponding positions of the support column 18. With this configuration, the movable member 28 can move in the direction of approaching and separating from the support column 18. The guide pins 32 and 34 are covered with coil springs 40 and 42 that urge the movable member 28 in the direction away from the support column 18. Although not shown, stoppers are provided on the upper unit 12 and the lower unit 14 to prevent the movable member 28 from separating from the support column 18 for a certain distance or more, whereby the movable member 28 can be prevented from falling off from the detection device 10. It is preventing.

対面板１６の中央には、マーク塗布棒２４が貫通可能な開口４４を開けてある。ユーザが支柱１８と可動部材２８を強く把持すると、可動部材２８がコイルスプリング４０，４２の付勢力に抗して支柱１８に近づき、マーク塗布棒２４のインク含浸スポンジ２６が対面板１６の開口４４から壁材側に突出する。図３は、この状態の側面図を示す。５０は石膏ボード等の壁材、５２は壁材５０の裏側に配置された配線ボックス、５４，５６は配線ボックス５２に付着されたアルミ箔である。この操作により、インク含浸スポンジ２６のインクが、壁材５０の表面に塗布される。これにより、壁材５０裏側の配線ボックス５２の中心位置が壁材５０の表面に墨付けされ、配線ボックス５２にアクセスするための開口を開ける穿孔の位置決定に利用される。 An opening 44 through which the mark application rod 24 can penetrate is opened in the center of the facing plate 16. When the user strongly grips the support column 18 and the movable member 28, the movable member 28 approaches the support column 18 against the urging force of the coil springs 40 and 42, and the ink impregnated sponge 26 of the mark coating rod 24 opens the opening 44 of the facing plate 16. Protrudes to the wall material side. FIG. 3 shows a side view of this state. 50 is a wall material such as gypsum board, 52 is a wiring box arranged on the back side of the wall material 50, and 54 and 56 are aluminum foils attached to the wiring box 52. By this operation, the ink of the ink impregnated sponge 26 is applied to the surface of the wall material 50. As a result, the center position of the wiring box 52 on the back side of the wall material 50 is marked on the surface of the wall material 50, and is used for determining the position of the perforation for opening the opening for accessing the wiring box 52.

図４は、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄのセンサ出力を処理する処理回路の概略構成ブロック図を示す。図５は、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄをアルミ箔と平行に移動させたときの、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄの出力特性図を示す。図５で、横軸は、水平方向（または垂直方向）の位置を示し、縦軸は、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄの出力を示す。ここでは、理解を容易にするために、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄは、金属を検出しないときに低レベル（図５ではゼロ値）で、金属に近くなるほどに高レベルになるセンサ出力特性を有するものとする。図５で、金属検出時のセンサ出力値Ｖｍは、一般的には、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄと探知対象のアルミ箔５４，５６との距離、及び壁材５０の素材に依存する。 FIG. 4 shows a schematic block diagram of a processing circuit that processes the sensor outputs of the metal sensors 20UR, 20UL, and 20D. FIG. 5 shows an output characteristic diagram of the metal sensors 20UR, 20UL, 20D when the metal sensors 20UR, 20UL, 20D are moved in parallel with the aluminum foil. In FIG. 5, the horizontal axis indicates the position in the horizontal direction (or the vertical direction), and the vertical axis indicates the output of the metal sensors 20UR, 20UL, 20D. Here, for ease of understanding, the metal sensors 20UR, 20UL, 20D have sensor output characteristics that are low level (zero value in FIG. 5) when no metal is detected and high level as they are closer to the metal. Shall have. In FIG. 5, the sensor output value Vm at the time of metal detection generally depends on the distance between the metal sensors 20UR, 20UL, 20D and the aluminum foils 54, 56 to be detected, and the material of the wall material 50.

図６を参照して、図４に示す回路の動作を説明する。図６は、探知装置１０の水平移動に対する金属センサの出力波形例及び合成波形例であって、図６（ａ）は下金属センサ２０Ｄの出力変化例を示し、図６（ｂ）は、金属センサ２０ＵＲ，２０ＵＬの出力変化例を示し、図６（ｃ）は、金属センサ２０ＵＲ，２０ＵＬの出力の和の変化例を示す。図６で、横軸は、探知装置１０を横方向に移動したときの水平位置を示し、縦軸は、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄの出力を示す。 The operation of the circuit shown in FIG. 4 will be described with reference to FIG. 6A and 6B are an example of an output waveform and a synthetic waveform of a metal sensor with respect to the horizontal movement of the detector 10, FIG. 6A shows an example of an output change of the lower metal sensor 20D, and FIG. 6B shows an example of a metal. An example of a change in the output of the sensors 20UR and 20UL is shown, and FIG. 6C shows an example of a change in the sum of the outputs of the metal sensors 20UR and 20UL. In FIG. 6, the horizontal axis indicates the horizontal position when the detector 10 is moved in the lateral direction, and the vertical axis indicates the output of the metal sensors 20UR, 20UL, 20D.

駆動回路６０ＵＲは、上右の金属センサ２０ＵＲの出力に従い、金属センサ２０ＵＲの出力値が大きいほどより明るく点灯するように、上右ＬＥＤ２２ＵＲを駆動する。ただし、駆動回路６０ＵＲは、金属センサ２０ＵＲのセンサ出力が所定値未満、例えば、後述する金属検出閾値ＴＨ１未満のときには、上右ＬＥＤ２２ＵＲを消灯するようにしてもよい。駆動回路６０ＵＬ，６０Ｄは、駆動回路６０ＵＲと同様に、それぞれ、金属センサ２０ＵＬ，２０Ｄの出力に従い、金属センサ２０ＵＬ，２０Ｄの出力値が大きいほどより明るく点灯するように、上右ＬＥＤ２２ＵＲ及び下ＬＥＤ２２Ｄを駆動する。 The drive circuit 60UR drives the upper right LED 22UR according to the output of the upper right metal sensor 20UR so that the larger the output value of the metal sensor 20UR, the brighter the lighting. However, the drive circuit 60UR may turn off the upper right LED 22UR when the sensor output of the metal sensor 20UR is less than a predetermined value, for example, less than the metal detection threshold TH1 described later. Similar to the drive circuit 60UR, the drive circuit 60UL and 60D have the upper right LED 22UR and the lower LED 22D so that the upper right LED 22UR and the lower LED 22D are lit brighter as the output value of the metal sensor 20UL and 20D increases according to the output of the metal sensor 20UL and 20D, respectively. Drive.

ユーザは、探知装置１０を垂直に立てられた壁材５０に沿って上下左右に移動させる。この移動により、金属センサ２０ＵＲ，２０ＵＬの何れかがアルミ箔５４を検出して、駆動回路６０ＵＲ，６０ＵＬが上右ＬＥＤ２２ＵＲ及び上左ＬＥＤ２２ＵＬの何れかまたは両方を点灯させ、金属センサ２０Ｄがアルミ箔５６を検出して駆動回路６０ＵＤが下ＬＥＤ２２Ｄを点灯させる位置に到達する。配線ボックス５２の位置が設計図上または施工上からある程度、予想出来る場合、その予想に従って探知装置１０を移動させることで、配線ボックス５２を大まかに探知出来る。この状態で、ユーザは、探知装置１０が壁材５０の裏側の配線ボックス５２の位置をその上下方向について探知出来たことになるが、水平方向については上右ＬＥＤ２２ＵＲ、上左ＬＥＤ２２ＵＬ及び下ＬＥＤ２２Ｄの点灯明るさに頼るしかない状態にある。 The user moves the detection device 10 up, down, left, and right along the vertically erected wall material 50. By this movement, either the metal sensor 20UR or 20UL detects the aluminum foil 54, the drive circuit 60UR or 60UL lights either or both of the upper right LED 22UR and the upper left LED 22UL, and the metal sensor 20D uses the aluminum foil 56. Is detected and the drive circuit 60UD reaches the position where the lower LED 22D is turned on. If the position of the wiring box 52 can be predicted to some extent from the design drawing or construction, the wiring box 52 can be roughly detected by moving the detection device 10 according to the prediction. In this state, the user can detect the position of the wiring box 52 on the back side of the wall material 50 in the vertical direction, but in the horizontal direction, the upper right LED 22UR, the upper left LED 22UL, and the lower LED 22D. There is no choice but to rely on the lighting brightness.

本実施例は、金属センサ２０ＵＲ，２０ＵＬのセンサ出力の和から、配線ボックス５２の水平位置を精度良く探知できる。以下、その動作を詳細に説明する。 In this embodiment, the horizontal position of the wiring box 52 can be accurately detected from the sum of the sensor outputs of the metal sensors 20UR and 20UL. The operation will be described in detail below.

下金属センサ２０Ｄが配線ボックス５２の下側のアルミ箔５６を検出している状態であることを確認するために、比較回路６２が、金属センサ２０Ｄのセンサ出力を金属検出閾値ＴＨ１と比較する。比較回路６２は、センサ出力が金属検出閾値ＴＨ１以上であると、出力を高（Ｈ）とし、それ以外では出力を低（Ｌ）とする。金属検出閾値ＴＨ１は、図６（ａ）に示すように、例えば、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄがアルミ箔５４，５６を検出しないときのセンサ出力と、アルミ箔５４，５６を検出したときのセンサ出力Ｖｍとの中間値に設定される。すなわち、金属検出閾値ＴＨ１は、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄがアルミ箔５４，５６を検出する金属検出状態にあるか否かを識別する基準値である。比較回路６２の出力Ｈは、金属センサ２０Ｄが何れかのアルミ箔５４，５６と対面する金属検出状態であることを示す。 In order to confirm that the lower metal sensor 20D is in the state of detecting the aluminum foil 56 on the lower side of the wiring box 52, the comparison circuit 62 compares the sensor output of the metal sensor 20D with the metal detection threshold TH1. The comparison circuit 62 sets the output to high (H) when the sensor output is equal to or higher than the metal detection threshold TH1, and sets the output to low (L) otherwise. As shown in FIG. 6A, the metal detection threshold TH1 is, for example, the sensor output when the metal sensors 20UR, 20UL, 20D do not detect the aluminum foils 54, 56, and the metal detection threshold TH1 when the aluminum foils 54, 56 are detected. It is set to an intermediate value with the sensor output Vm. That is, the metal detection threshold TH1 is a reference value for identifying whether or not the metal sensors 20UR, 20UL, 20D are in the metal detection state for detecting the aluminum foils 54, 56. The output H of the comparison circuit 62 indicates that the metal sensor 20D is in a metal detection state facing any of the aluminum foils 54 and 56.

図６（ｂ）で、実線は金属センサ２０ＵＬのセンサ出力を示し、破線は金属センサ２０ＵＲのセンサ出力を示す。金属センサ２０ＵＬと金属センサ２０ＵＲが横方向（一般的には水平方向）で離れており、この横方向の間隔に応じて、金属センサ２０ＵＬ，２０ＵＲのセンサ出力が、図６（ｂ）に実線と破線で示すように水平位置に対してずれる。金属センサ２０ＵＬと金属センサ２０ＵＲの間隔を探知対象のアルミ箔５４の横幅と同程度にすることにより、センサ出力の重なり部を狭くすることができ、水平位置探知の精度が向上する。 In FIG. 6B, the solid line shows the sensor output of the metal sensor 20UL, and the broken line shows the sensor output of the metal sensor 20UL. The metal sensor 20UL and the metal sensor 20UR are separated in the horizontal direction (generally in the horizontal direction), and the sensor outputs of the metal sensors 20UL and 20UR are shown by the solid line in FIG. It shifts with respect to the horizontal position as shown by the broken line. By making the distance between the metal sensor 20UL and the metal sensor 20UR about the same as the width of the aluminum foil 54 to be detected, the overlapping portion of the sensor output can be narrowed, and the accuracy of horizontal position detection is improved.

加算器６４は、金属センサ２０ＵＬ，２０ＵＲのセンサ出力を加算する。図６（ｃ）は加算器６４の出力を示す。図６（ｃ）に示すように、加算器６４は、探知装置１０がアルミ箔５４の中央位置、すなわち配線ボックス５２の水平方向の中心位置に対面するとき、ピークを持つ。このピークの極大値（図示例では、ほぼ２Ｖｍ）の位置が、探知対象である配線ボックス５２の中心（水平方向での中心）に相当する。 The adder 64 adds the sensor outputs of the metal sensors 20UL and 20UR. FIG. 6 (c) shows the output of the adder 64. As shown in FIG. 6 (c), the adder 64 has a peak when the detector 10 faces the center position of the aluminum foil 54, that is, the horizontal center position of the wiring box 52. The position of the maximum value (approximately 2 Vm in the illustrated example) of this peak corresponds to the center (horizontal center) of the wiring box 52 to be detected.

比較回路６６が加算器６４の出力を中央判定閾値ＴＨ２と比較する。比較回路６６は、加算器６４の出力が中央判定閾値ＴＨ２以上であると、出力を高（Ｈ）とし、それ以外では出力を低（Ｌ）とする。中央判定閾値ＴＨ２は、金属センサ２０ＵＬ，２０ＵＲが同時に金属検出状態にあることを判定するための基準値であり、金属検出時センサ出力値Ｖｍより大きく、且つ、加算器６４のピーク値より低い値に設定される。中央判定閾値ＴＨ２が金属検出時センサ出力値Ｖｍに近いほど、中央検出精度が低くなり、加算器６４の出力のピーク値に近い程、中央検出精度が高くなる。中央判定閾値ＴＨ２が加算器６４の出力のピーク値より大きいと、左右の中央を検出出来なくなる。そこで、中央判定閾値ＴＨ２は変更可能であるのが好ましい。この変更のための手段は、後述する。 The comparison circuit 66 compares the output of the adder 64 with the central determination threshold TH2. The comparison circuit 66 sets the output to high (H) when the output of the adder 64 is equal to or higher than the central determination threshold TH2, and sets the output to low (L) otherwise. The central determination threshold TH2 is a reference value for determining that the metal sensors 20UL and 20UR are in the metal detection state at the same time, and is a value larger than the sensor output value Vm at the time of metal detection and lower than the peak value of the adder 64. Is set to. The closer the central determination threshold TH2 is to the metal detection sensor output value Vm, the lower the central detection accuracy, and the closer to the peak value of the output of the adder 64, the higher the central detection accuracy. If the center determination threshold TH2 is larger than the peak value of the output of the adder 64, the left and right centers cannot be detected. Therefore, it is preferable that the central determination threshold value TH2 can be changed. The means for this change will be described later.

比較回路６６の代わりに、金属センサ２０ＵＬのセンサ出力を金属検出閾値ＴＨ１と比較する比較回路と、金属センサ２０ＵＲのセンサ出力を金属検出閾値ＴＨ１と比較する比較回路を設け、アンド回路６８が、これら代替の比較回路の２値出力と比較回路６２の２値出力の論理積を取るようにしてもよい。 Instead of the comparison circuit 66, a comparison circuit for comparing the sensor output of the metal sensor 20UL with the metal detection threshold TH1 and a comparison circuit for comparing the sensor output of the metal sensor 20UR with the metal detection threshold TH1 are provided. The logical product of the binary output of the alternative comparison circuit and the binary output of the comparison circuit 62 may be taken.

アンド回路６８は、比較回路６２，６６の２値出力の論理積をとる。すなわち、アンド回路６８は、比較回路６２，６６の出力が共に高（Ｈ）の場合にのみ、出力を高（Ｈ）にし、これ以外の場合には出力を低（Ｌ）にする。常開スイッチ７０は、アンド回路６８の出力が高（Ｈ）であるときに閉成（オン）状態になり、アンド回路６８の出力が低（Ｌ）であるときには開放（オフ）状態になる。 The AND circuit 68 takes the logical product of the binary outputs of the comparison circuits 62 and 66. That is, the AND circuit 68 sets the output to high (H) only when the outputs of the comparison circuits 62 and 66 are both high (H), and sets the output to low (L) in other cases. The normally open switch 70 is in the closed (on) state when the output of the AND circuit 68 is high (H), and is in the open (off) state when the output of the AND circuit 68 is low (L).

加算器６４の出力は、スイッチ７０を介して、中央ＬＥＤ２２Ｃの駆動回路６０Ｃに印加される。すなわち、探知装置１０が配線ボックス５２の中心をほぼ検出できているとき（比較回路６２，６６の出力が共に高（Ｈ）のとき）にのみ、加算器６４の出力が駆動回路６０Ｃに印加される。駆動回路６０Ｃは、スイッチ７０を介して入力する加算器６４の出力値に応じた輝度で、中央ＬＥＤ２２Ｃを発光させる。中央ＬＥＤ２２Ｃの点灯と発光輝度により、探知装置１０のユーザは、探知装置１０が壁材５０の裏側に位置する配線ボックス５２の水平方向及び垂直方向の中央に対面していることを知ることができる。 The output of the adder 64 is applied to the drive circuit 60C of the central LED 22C via the switch 70. That is, the output of the adder 64 is applied to the drive circuit 60C only when the detector 10 can almost detect the center of the wiring box 52 (when the outputs of the comparison circuits 62 and 66 are both high (H)). Ru. The drive circuit 60C causes the central LED 22C to emit light with a brightness corresponding to the output value of the adder 64 input via the switch 70. The lighting of the central LED 22C and the emission brightness allow the user of the detector 10 to know that the detector 10 faces the center of the wiring box 52 located on the back side of the wall material 50 in the horizontal and vertical directions. ..

本実施例では、比較回路６２、加算器６４、比較回路６６、アンド回路６８及びスイッチ７０からなる回路構成が、探知装置１０が壁材５０の裏側に位置する配線ボックス５２の水平方向（横方向）及び垂直方向（上下方向）の両方でほぼ中央に対面している状態でのみ、中央ＬＥＤ２２Ｃを点灯可能な状態にするので、配線ボックス５２の水平方向の中央を精度良く探知出来る。垂直方向の探知精度はアルミ箔５４，５６の垂直方向の幅に依存するが、これは、アルミ箔５４，５６の垂直方向幅を小さくすることで改善出来る。 In this embodiment, the circuit configuration including the comparison circuit 62, the adder 64, the comparison circuit 66, the AND circuit 68, and the switch 70 is the horizontal direction (horizontal direction) of the wiring box 52 in which the detection device 10 is located on the back side of the wall material 50. ) And the central LED 22C can be turned on only when facing the center in both the vertical direction (vertical direction), so that the horizontal center of the wiring box 52 can be detected with high accuracy. The vertical detection accuracy depends on the vertical width of the aluminum foils 54 and 56, which can be improved by reducing the vertical width of the aluminum foils 54 and 56.

選択スイッチ７２は、金属検出閾値ＴＨ１として大きさの異なる２つの値ＴＨ１（Ｌ），ＴＨ１（Ｈ）の一方を選択して比較回路６２に印加し、選択スイッチ７４は、中央判定閾値ＴＨ２として大きさの異なる２つの値ＴＨ２（Ｌ），ＴＨ２（Ｈ）の一方を選択して比較回路６６に印加する。操作手段としての閾値切替えダイヤル７６により、選択スイッチ７２，７４を連動して切り替えることができる。すなわち、選択スイッチ７２が低閾値ＴＨ１（Ｌ）を選択するとき、選択スイッチ７４は低閾値ＴＨ２（Ｌ）を選択し、選択スイッチ７２が高閾値ＴＨ１（Ｈ）を選択するとき、選択スイッチ７４は高閾値ＴＨ２（Ｈ）を選択する。例えば、高閾値ＴＨ１（Ｈ）、ＴＨ２（Ｈ）を選択している状態で、壁材５０の裏側の配線ボックス５２を検出出来ないとき、閾値切替えダイヤル７６により、低閾値ＴＨ１（Ｌ）、ＴＨ２（Ｌ）を選択するように選択スイッチ７２，７４を切り替えれば良い。もちろん、閾値ＴＨ１の大きさを変更する必要性が乏しい場合には、選択スイッチ７２を省略しても良い。また、中央判定閾値ＴＨ２を金属検出閾値ＴＨ１と連動せずに複数の値のどれかに切り替えたい場合には、選択スイッチ７４を単独で操作する操作手段を設ければ良い。 The selection switch 72 selects one of two values TH1 (L) and TH1 (H) having different sizes as the metal detection threshold TH1 and applies it to the comparison circuit 62, and the selection switch 74 has a large central determination threshold TH2. One of the two values TH2 (L) and TH2 (H) having different values is selected and applied to the comparison circuit 66. The threshold switching dial 76 as an operating means can be used to switch the selection switches 72 and 74 in conjunction with each other. That is, when the selection switch 72 selects the low threshold TH1 (L), the selection switch 74 selects the low threshold TH2 (L), and when the selection switch 72 selects the high threshold TH1 (H), the selection switch 74 Select the high threshold TH2 (H). For example, when the high threshold value TH1 (H) and TH2 (H) are selected and the wiring box 52 on the back side of the wall material 50 cannot be detected, the low threshold value TH1 (L) and TH2 are used by the threshold value switching dial 76. The selection switches 72 and 74 may be switched so as to select (L). Of course, if there is little need to change the magnitude of the threshold value TH1, the selection switch 72 may be omitted. Further, when it is desired to switch the central determination threshold value TH2 to any of a plurality of values without interlocking with the metal detection threshold value TH1, an operation means for operating the selection switch 74 independently may be provided.

金属検出閾値ＴＨ１をセンサ出力Ｖｍに近い値にすると、壁材５０が厚い場合等、配線ボックス５２が壁材５０の裏側の深い位置に設置される場合にこれを見逃す可能性が高くなる。これを防ぐために、本実施例は、金属検出閾値ＴＨ１の大きさを選択可能としている。実際、壁材５０として使用される石膏ボードは厚みが１５ｍｍと１７ｍｍの２種類なので、本実施例では、金属検出閾値ＴＨ１として、２つの値ＴＨ１（Ｈ）とＴＨ１（Ｌ）を選択出来るようにしている。 When the metal detection threshold TH1 is set to a value close to the sensor output Vm, there is a high possibility that the wiring box 52 will be overlooked when the wiring box 52 is installed at a deep position on the back side of the wall material 50, such as when the wall material 50 is thick. In order to prevent this, in this embodiment, the size of the metal detection threshold TH1 can be selected. In fact, since the gypsum board used as the wall material 50 has two types of thicknesses of 15 mm and 17 mm, in this embodiment, two values TH1 (H) and TH1 (L) can be selected as the metal detection threshold TH1. ing.

ユーザへのアルミ箔５４，５６の検出をＬＥＤの点灯と輝度でユーザに通知しているが、トーン音の周波数／音量でユーザに通知する方式に代えても良く、更には、両者を併用しても良い。 The detection of the aluminum foils 54 and 56 to the user is notified to the user by the lighting and brightness of the LED, but it may be replaced with the method of notifying the user by the frequency / volume of the tone sound, and further, both may be used together. May be.

図４では、中央ＬＥＤ２２Ｃは、加算器６４の出力強度に応じた輝度で発光する。これにより、探知装置１０の利用者は、中央ＬＥＤ２２Ｃの発光強度を目安に、配線ボックス５２の水平方向中央を精度良く判断出来る。 In FIG. 4, the central LED 22C emits light with a brightness corresponding to the output intensity of the adder 64. As a result, the user of the detection device 10 can accurately determine the center of the wiring box 52 in the horizontal direction by using the light emission intensity of the central LED 22C as a guide.

このような、水平方向の探知精度を要求しない場合、スイッチ７０を省略し、駆動回路６０Ｃが、アンド回路６８の出力が高（Ｈ）のときに中央ＬＥＤ２２Ｃを点灯させ、アンド回路６８の出力が低（Ｌ）のときに消灯させるようにしても良い。この構成でも、探知装置１０の横移動の間の中央ＬＥＤ２２Ｃの点灯の様子から、利用者は、配線ボックス５２の水平方向中央を推測出来る。 When such horizontal detection accuracy is not required, the switch 70 is omitted, the drive circuit 60C turns on the central LED 22C when the output of the AND circuit 68 is high (H), and the output of the AND circuit 68 is output. It may be turned off when it is low (L). Even in this configuration, the user can infer the horizontal center of the wiring box 52 from the lighting state of the central LED 22C during the lateral movement of the detection device 10.

下側ユニットと下側ユニットの両方に、横方向に所定距離離れた２つの金属ユニットを配置した実施例２を説明する。実施例２では、壁材５０の裏側に隠れる配線ボックス５２が水平・垂直ラインから傾いている場合にも、その方向を含めて中心を精度良く探知出来る。 The second embodiment in which two metal units laterally separated by a predetermined distance are arranged on both the lower unit and the lower unit will be described. In the second embodiment, even when the wiring box 52 hidden behind the wall material 50 is tilted from the horizontal / vertical line, the center can be detected accurately including the direction.

図７（ａ）は、実施例２である探知装置１１０の正面図を示し、図７（ｂ）はその背面図を示す。実施例１と同じ機能の構成要素には同じ符号を付してある。 FIG. 7A shows a front view of the detector 110 according to the second embodiment, and FIG. 7B shows a rear view thereof. The same reference numerals are given to the components having the same functions as those in the first embodiment.

図７（ａ）に示すように、探知装置１１０では、上側ユニット１２には実施例１と同様の金属センサ１２０ＵＲ，１２０ＵＬを配置され、下側ユニット１４にも、金属センサ１２０ＵＲ，１２０ＵＬと同じ距離離れて２つの金属センサ１２０ＤＲ，１２０ＤＬが配置されている。上側ユニット１２の金属センサ１２０ＵＲ，１２０ＵＬは、実施例１の金属センサ２０ＵＲ，２０ＵＬと同じ位置関係で配置され、同じ機能を有するが、理解を容易にするために異なる符号を付してある。金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬは、金属に対して金属センサ２０ＵＲ，２０ＵＬ，２０Ｄと同じ特性を有する。 As shown in FIG. 7A, in the detection device 110, the metal sensors 120UR and 120UL similar to those in the first embodiment are arranged in the upper unit 12, and the metal sensors 120UR and 120UL are also arranged in the lower unit 14 at the same distance as the metal sensors 120UR and 120UL. Two metal sensors 120DR and 120DL are arranged apart from each other. The metal sensors 120UR and 120UL of the upper unit 12 are arranged in the same positional relationship as the metal sensors 20UR and 20UL of the first embodiment, have the same functions, but are designated by different reference numerals for ease of understanding. The metal sensors 120UR, 120UL, 120DR and 120DL have the same characteristics as the metal sensors 20UR, 20UL and 20D with respect to metal.

探知装置１１０の背面には、図７（ｂ）に示すように、５つのＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬ，１２２Ｃが配置されている。上右ＬＥＤ１２２ＵＲは、上右ＬＥＤ２２ＵＲと同様に、上右の金属センサ１２０ＵＲの金属検知状況を示し、上左ＬＥＤ１２２ＵＬは、上左ＬＥＤ２２ＵＬと同様に上左の金属センサ１２０ＵＬの金属検知状況を示す。下右ＬＥＤ１２２ＤＲは、下右の金属センサ１２０ＤＲの金属検知状況を示し、下左ＬＥＤ１２２ＤＬは、下左の金属センサ１２０ＤＬの金属検知状況を示す。ＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬは、対応する金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬと同じ位置関係の４隅に配置され、中央ＬＥＤ１２２Ｃは、これらＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬで構成される四角形の中央に配置される。中央ＬＥＤ１２２Ｃは、詳細は後述するが、探知装置１１０が壁材の裏側の配線ボックスの正面に対面する位置で点灯する。 As shown in FIG. 7B, five LEDs 122UR, 122UL, 122DR, 122DL, and 122C are arranged on the back surface of the detector 110. The upper right LED 122UR shows the metal detection status of the upper right metal sensor 120UR like the upper right LED 22UR, and the upper left LED 122UL shows the metal detection status of the upper left metal sensor 120UL like the upper left LED 22UL. The lower right LED 122DR shows the metal detection status of the lower right metal sensor 120DR, and the lower left LED 122DL shows the metal detection status of the lower left metal sensor 120DL. The LEDs 122UR, 122UL, 122DR, 122DL are arranged at the four corners having the same positional relationship as the corresponding metal sensors 120UR, 120UL, 120DR, 120DL, and the central LED 122C is the center of the quadrangle composed of these LEDs 122UR, 122UL, 122DR, 122DL. Is placed in. The central LED 122C is lit at a position where the detection device 110 faces the front of the wiring box on the back side of the wall material, which will be described in detail later.

図８は、金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬのセンサ出力を処理して、ＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬ，１２２Ｃを点灯させる処理回路の概略構成ブロック図を示す。 FIG. 8 shows a schematic block diagram of a processing circuit that processes the sensor outputs of the metal sensors 120UR, 120UL, 120DR, and 120DL to light the LEDs 122UR, 122UL, 122DR, 122DL, 122C.

駆動回路１６０ＵＲ，１６０ＵＬ，１６０ＤＲ，１６０ＤＬはそれぞれ、金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬの出力に従い、金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬの出力値が大きいほどより明るく点灯するように、ＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬを駆動する。駆動回路１６０ＵＲ，１６０ＵＬ，１６０ＤＲ，１６０ＤＬの動作は、駆動回路６０ＵＲ，６０ＵＬと同じである。 The drive circuits 160UR, 160UL, 160DR and 160DL follow the outputs of the metal sensors 120UR, 120UL, 120DR and 120DL, respectively, and the larger the output values of the metal sensors 120UR, 120UL, 120DR and 120DL are, the brighter the LEDs 122UR and 122UL are lit. , 122DR, 122DL are driven. The operation of the drive circuits 160UR, 160UL, 160DR, 160DL is the same as that of the drive circuits 60UR, 60UL.

駆動回路１６０ＵＲ，１６０ＵＬ，１６０ＤＲ，１６０ＤＬは、入力するセンサ出力が金属検出閾値ＴＨ１以上であるときに、対応する金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬのセンサ出力レベルに応じた輝度でＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬを点灯させるようにしてもよい。これにより、金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬが釘などの微小な金属部材を検出したときに、ＬＥＤ１２２ＵＲ，１２２ＵＬ，１２２ＤＲ，１２２ＤＬが点灯してしまうことを防止出来る。 The drive circuits 160UR, 160UL, 160DR, 160DL have LEDs 122UR, 122UL, with brightness corresponding to the sensor output level of the corresponding metal sensors 120UR, 120UL, 120DR, 120DL when the input sensor output is equal to or higher than the metal detection threshold TH1. The 122DR and 122DL may be turned on. This makes it possible to prevent the LEDs 122UR, 122UL, 122DR, and 122DL from lighting when the metal sensors 120UR, 120UL, 120DR, and 120DL detect minute metal members such as nails.

ユーザが、一般に垂直に立てられた壁材５０に沿って探知装置１１０を上下左右に移動させる。この移動により、金属センサ１２０ＵＲ，１２０ＵＬの何れかがアルミ箔５４又は５６を検出して、駆動回路１６０ＵＲ，１６０ＵＬが上右ＬＥＤ１２２ＵＲ及び上左ＬＥＤ１２２ＵＬの何れかまたは両方を点灯させる。同様に、金属センサ１２０ＤＲ，１２０ＤＬの何れかがアルミ箔５６又は５４を検出して、駆動回路１６０ＤＲ，１６０ＤＬが下右ＬＥＤ１２２ＤＲ及び下左ＬＥＤ１２２ＤＬの何れかまたは両方を点灯させる。上右ＬＥＤ１２２ＵＲ及び上左ＬＥＤ１２２ＵＬの一方または両方が点灯し、且つ、下右ＬＥＤ１２２ＤＲ及び下左ＬＥＤ１２２ＤＬの一方または両方が点灯した状態で、探知装置１１０は壁材５０の裏側の配線ボックス５２を大まかに探知出来たことになる。 The user generally moves the detector 110 up, down, left, and right along the vertically erected wall material 50. By this movement, one of the metal sensors 120UR and 120UL detects the aluminum foil 54 or 56 , and the drive circuit 160UR and 160UL turn on either or both of the upper right LED 122UR and the upper left LED 122UL. Similarly, any of the metal sensors 120DR and 120DL detects the aluminum foil 56 or 54, and the drive circuits 160DR and 160DL light either or both of the lower right LED 122DR and the lower left LED 122DL. With one or both of the upper right LED 122UR and the upper left LED 122UL lit and one or both of the lower right LED 122DR and the lower left LED 122DL lit, the detector 110 roughly sets the wiring box 52 on the back side of the wall material 50. It means that it could be detected.

加算器１６４Ｕは、金属センサ１２０ＵＲ，１２０ＵＬのセンサ出力を加算または合成する。加算器１６４Ｕの出力は、探知装置１１０の水平移動に対して、加算器６４の出力（図６（ｃ））と同様に、探知装置１０がアルミ箔５４の中央位置、すなわち配線ボックス５２の水平方向の中心位置に対面するとき、ピークを持つ。このピークの極大値（図示例では、ほぼ２Ｖｍ）の位置が、探知対象である配線ボックス５２の中心（水平方向での中心）に相当する。 The adder 164U adds or combines the sensor outputs of the metal sensors 120UR and 120UL. The output of the adder 164U is the same as the output of the adder 64 (FIG. 6 (c)) with respect to the horizontal movement of the detector 110. It has a peak when facing the center position in the direction. The position of the maximum value (approximately 2 Vm in the illustrated example) of this peak corresponds to the center (horizontal center) of the wiring box 52 to be detected.

比較回路１６６Ｕが加算器１６４Ｕの出力を中央判定閾値ＴＨ２と比較する。比較回路１６６Ｕは、加算器１６４Ｕの出力が中央判定閾値ＴＨ２以上であると、出力を高（Ｈ）とし、それ以外では出力を低（Ｌ）とする。中央判定閾値ＴＨ２は、実施例１と同様に、金属検出時センサ出力値Ｖｍより大きく、且つ、加算器１６４Ｕのピーク値より低い値に設定される。 The comparison circuit 166U compares the output of the adder 164U with the central determination threshold TH2. The comparison circuit 166U sets the output to high (H) when the output of the adder 164U is equal to or higher than the central determination threshold TH2, and sets the output to low (L) otherwise. The central determination threshold value TH2 is set to a value larger than the metal detection sensor output value Vm and lower than the peak value of the adder 164U, as in the first embodiment.

比較回路１６６Ｕ，１６６Ｄの代わりに、金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬのセンサ出力を金属検出閾値ＴＨ１と比較する４つの比較回路を設け、アンド回路１６８が、これら代替の４つの比較回路の２値出力の論理積を取るようにしてもよい。 Instead of the comparison circuits 166U and 166D, four comparison circuits for comparing the sensor output of the metal sensors 120UR, 120UL, 120DR and 120DL with the metal detection threshold TH1 are provided, and the AND circuit 168 is 2 of these alternative four comparison circuits. The logical product of the value output may be taken.

加算器１６４Ｄは、金属センサ１２０ＤＲ，１２０ＤＬのセンサ出力を加算する。加算器１６４Ｄの出力は、探知装置１１０の水平移動に対して、加算器６４，１６４Ｕの出力と同様に、探知装置１１０がアルミ箔５６の中央位置、すなわち配線ボックス５２の水平方向の中心位置に対面するとき、ピークを持つ。このピークの極大値（図示例では、ほぼ２Ｖｍ）の位置が、探知対象である配線ボックス５２の中心（水平方向での中心）に相当する。比較回路１６６Ｄが加算器１６４Ｄの出力を中央判定閾値ＴＨ２と比較する。比較回路１６６Ｄは、加算器１６４Ｄの出力が中央判定閾値ＴＨ２以上であると、出力を高（Ｈ）とし、それ以外では出力を低（Ｌ）とする。 The adder 164D adds the sensor outputs of the metal sensors 120DR and 120DL. The output of the adder 164D is such that the detector 110 is located at the center position of the aluminum foil 56, that is, the horizontal center position of the wiring box 52, in the same manner as the output of the adders 64 and 164U, with respect to the horizontal movement of the adder 110. When facing each other, it has a peak. The position of the maximum value (approximately 2 Vm in the illustrated example) of this peak corresponds to the center (horizontal center) of the wiring box 52 to be detected. The comparison circuit 166D compares the output of the adder 164D with the central determination threshold TH2. The comparison circuit 166D sets the output to high (H) when the output of the adder 164D is equal to or higher than the central determination threshold value TH2, and sets the output to low (L) otherwise.

加算器１６５は、加算器１６４Ｕ，１６４Ｄの出力を加算する。加算器１６５の出力は、４つの金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬが全て金属を検出しているときに、最も大きく、ほぼ４Ｖｍになる。 The adder 165 adds the outputs of the adders 164U and 164D. The output of the adder 165 is the largest, approximately 4 Vm, when all four metal sensors 120UR, 120UL, 120DR and 120DL are detecting metal.

アンド回路１６８は、比較回路１６６Ｕ，１６６Ｄの２値出力の論理積をとる。すなわち、アンド回路１６８は、比較回路１６６Ｕ，１６６Ｄの出力が共に高（Ｈ）の場合にのみ、出力を高（Ｈ）にし、これ以外の場合には出力を低（Ｌ）にする。常開スイッチ１７０は、アンド回路１６８の出力が高（Ｈ）であるときに閉成（オン）状態になり、アンド回路１６８の出力が低（Ｌ）であるときには開放（オフ）状態になる。 The AND circuit 168 takes the logical product of the binary outputs of the comparison circuits 166U and 166D. That is, the AND circuit 168 sets the output to high (H) only when the outputs of the comparison circuits 166U and 166D are both high (H), and sets the output to low (L) in other cases. The normally open switch 170 is in the closed (on) state when the output of the AND circuit 168 is high (H), and is in the open (off) state when the output of the AND circuit 168 is low (L).

加算器１６５の出力は、スイッチ１７０を介して、中央ＬＥＤ１２２Ｃの駆動回路１６０Ｃに印加される。すなわち、探知装置１１０が配線ボックス５２の中心をほぼ検出できているとき（比較回路１６６Ｕ，１６６Ｄの出力が共に高（Ｈ）のとき）にのみ、加算器１６５の出力が駆動回路１６０Ｃに印加される。駆動回路１６０Ｃは、スイッチ１７０を介して入力する加算器１６５の出力値に応じた輝度で、中央ＬＥＤ１２２Ｃを発光させる。中央ＬＥＤ１２２Ｃの点灯と発光輝度により、探知装置１１０のユーザは、探知装置１１０が壁材５０の裏側に位置する配線ボックス５２の水平方向及び垂直方向の中央に対面していることを知ることができる。 The output of the adder 165 is applied to the drive circuit 160C of the central LED 122C via the switch 170. That is, the output of the adder 165 is applied to the drive circuit 160C only when the detector 110 can almost detect the center of the wiring box 52 (when the outputs of the comparison circuits 166U and 166D are both high (H)). Ru. The drive circuit 160C causes the central LED 122C to emit light with a brightness corresponding to the output value of the adder 165 input via the switch 170. The lighting and emission brightness of the central LED 122C allow the user of the detector 110 to know that the detector 110 faces the center of the wiring box 52 located behind the wall material 50 in the horizontal and vertical directions. ..

加算器１６５の出力が一定レベル以上の場合にスイッチ１７０を閉成するようにしてもよいが、配線ボックス５２の中心を検出したときの加算器１６５の出力レベルは、壁材５０の厚みや材質に影響されやすく、閾値を決定しづらい。加算器１６４Ｕ，１６４Ｄの利用環境による出力レベル変化は、加算器１６５のそれよりも小さいので、図８に示す構成の方が、幅広い環境に対応しやすくなる。 The switch 170 may be closed when the output of the adder 165 is above a certain level, but the output level of the adder 165 when the center of the wiring box 52 is detected is the thickness or material of the wall material 50. It is easy to be affected by and it is difficult to determine the threshold value. Since the change in output level depending on the usage environment of the adders 164U and 164D is smaller than that of the adder 165, the configuration shown in FIG. 8 is easier to handle in a wide range of environments.

本実施例２では、上側の金属センサと下側の金属センサのそれぞれでアルミ箔５４，５６を検出するので、例えば、水平・垂直ラインから傾いて配置された配線ボックス５２の中心も容易に探知出来る。 In the second embodiment, the aluminum foils 54 and 56 are detected by the upper metal sensor and the lower metal sensor, respectively, so that, for example, the center of the wiring box 52 inclined from the horizontal / vertical line can be easily detected. You can.

選択スイッチ１７４は、中央判定閾値ＴＨ２として大きさの異なる２つの値ＴＨ２（Ｌ），ＴＨ２（Ｈ）の一方を選択して比較回路１６６Ｕ，１６６Ｄに印加する。利用者は、操作手段としての閾値切替えダイヤル１７６により、選択スイッチ１７４を切り替えることができる。例えば、高閾値ＴＨ２（Ｈ）を選択している状態で、壁材５０の裏側の配線ボックス５２を検出出来ないとき、閾値切替えダイヤル１７６により、低閾値ＴＨ２（Ｌ）を選択するように選択スイッチ１７４を切り替えれば良い。 The selection switch 174 selects one of two values TH2 (L) and TH2 (H) having different sizes as the central determination threshold value TH2 and applies them to the comparison circuits 166U and 166D. The user can switch the selection switch 174 by using the threshold value switching dial 176 as the operating means. For example, when the wiring box 52 on the back side of the wall material 50 cannot be detected while the high threshold value TH2 (H) is selected, the selection switch is used to select the low threshold value TH2 (L) by the threshold value switching dial 176. You can switch between 174.

アルミ箔５４，５６の検出をＬＥＤの点灯と輝度でユーザに通知しているが、トーン音の周波数／音量でユーザに通知する方式に代えても良く、更には、両者を併用しても良い。 The detection of the aluminum foils 54 and 56 is notified to the user by the lighting and brightness of the LED, but it may be replaced with the method of notifying the user by the frequency / volume of the tone sound, or even if both are used together. good.

図８に示す回路構成では、中央ＬＥＤ１２２Ｃは、加算器１６５の出力強度に応じた輝度で発光する。これにより、探知装置１１０の利用者は、中央ＬＥＤ１２２Ｃの発光強度を目安に、配線ボックス５２の水平方向中央を精度良く判断出来る。 In the circuit configuration shown in FIG. 8, the central LED 122C emits light with a brightness corresponding to the output intensity of the adder 165. As a result, the user of the detection device 110 can accurately determine the horizontal center of the wiring box 52 with reference to the light emission intensity of the central LED 122C.

これほどの水平方向の探知精度を要求しない場合、加算器１６５及びスイッチ１７０を省略し、駆動回路１６０Ｃが、アンド回路１６８の出力が高（Ｈ）のときに中央ＬＥＤ１２２Ｃを点灯させ、アンド回路１６８の出力が低（Ｌ）のときに消灯させるようにしても良い。この構成でも、探知装置１１０の横移動の間の中央ＬＥＤ１２２Ｃの点灯の様子から、利用者は、配線ボックス５２の水平方向中央を推測出来る。 When such horizontal detection accuracy is not required, the adder 165 and the switch 170 are omitted, and the drive circuit 160C turns on the central LED 122C when the output of the AND circuit 168 is high (H), and the AND circuit 168 is turned on. It may be turned off when the output of is low (L). Even in this configuration, the user can infer the horizontal center of the wiring box 52 from the lighting state of the central LED 122C during the lateral movement of the detection device 110.

金属センサとして、金属を検出していないときに大出力で、金属を検出すると出力値が小さくなるものがある。 Some metal sensors have a high output when metal is not detected, and the output value decreases when metal is detected.

実施例１に対しては、金属センサ２０ＵＲ，２０ＵＬ，２０Ｄが、そのような特性を有する場合、金属検出閾値ＴＨ１及び中央判定閾値ＴＨ２と比較回路６２，６６の動作を次にように変更すれば良い。 For the first embodiment, when the metal sensors 20UR, 20UL, 20D have such characteristics, the operations of the metal detection threshold value TH1 and the central determination threshold value TH2 and the comparison circuits 62, 66 may be changed as follows. good.

金属センサ２０ＵＲ，２０ＵＬ，２０Ｄの、金属を検出していないときの出力をＶ０、金属を検出しているときの出力をＶｍ（＜Ｖ０）とする。加算器６４の出力は、金属センサ２０ＵＲ，２０ＵＬがいずれも金属を検出していないとき、２Ｖ０、金属センサ２０ＵＲ，２０ＵＬの一方のみが金属を検出しているとき、Ｖ０＋Ｖｍ、金属センサ２０ＵＲ，２０ＵＬの両方が同時に金属を検出しているとき、最大でほぼ２Ｖｍとなる。従って、金属検出閾値ＴＨ１を２Ｖ０とＶ０＋Ｖｍの中間値、好ましくは２Ｖ０に近い値とし、中央判定閾値ＴＨ２をＶ０＋Ｖｍと２Ｖｍの中間値、好ましくはＶ０＋Ｖｍに近い値とすればよい。 The output of the metal sensors 20UR, 20UL, and 20D when no metal is detected is V0, and the output when metal is detected is Vm (<V0). The output of the adder 64 is V0 + Vm, metal sensor 20UR, 20UL when the metal sensor 20UR, 20UL does not detect metal, and when only one of the metal sensor 20UR, 20UL detects metal. When both are detecting metal at the same time, the maximum is approximately 2 Vm. Therefore, the metal detection threshold TH1 may be an intermediate value between 2V0 and V0 + Vm, preferably a value close to 2V0, and the median determination threshold TH2 may be an intermediate value between V0 + Vm and 2Vm, preferably a value close to V0 + Vm.

比較回路６２は、金属センサ２０Ｄの出力が金属検出閾値ＴＨ１以上のとき、出力を低（Ｌ）とし、金属センサ２０Ｄの出力が金属検出閾値ＴＨ１を下回ると、出力を（Ｈ）とする。比較回路６６は、加算器６４の出力が閾値ＴＨ２以上のとき、出力を低（Ｌ）とし、加算器６４の出力が中央判定閾値ＴＨ２を下回ると、出力を高（Ｈ）とする。アンド回路６８及びスイッチ７０の動作は、実施例１と同様である。 The comparison circuit 62 sets the output to low (L) when the output of the metal sensor 20D is equal to or higher than the metal detection threshold TH1, and sets the output to (H) when the output of the metal sensor 20D falls below the metal detection threshold TH1. The comparison circuit 66 sets the output to low (L) when the output of the adder 64 is equal to or higher than the threshold value TH2, and sets the output to high (H) when the output of the adder 64 is lower than the central determination threshold value TH2. The operation of the AND circuit 68 and the switch 70 is the same as that of the first embodiment.

駆動回路６０ＵＲ，６０ＵＬ，６０ＵＤ，６０Ｃは、入力信号に対して、実施例１とは逆の特性でＬＥＤ２２ＵＲ，２２ＵＬ，２２Ｄ，２２Ｃを駆動する。すなわち、駆動回路６０ＵＲ，６０ＵＬ，６０ＵＤは、入力値と金属非検出時のセンサ出力Ｖ０との差値が大きくなるほど、ＬＥＤ２２ＵＲ，２２ＵＬ，２２Ｄをより明るく点灯させる。駆動回路６０Ｃは、入力値と金属非検出時の加算器出力２Ｖ０との差値が大きくなるほど、ＬＥＤ２２Ｃをより明るく点灯させる。 The drive circuits 60UR, 60UL, 60UD, 60C drive the LEDs 22UR, 22UL, 22D, 22C with the characteristics opposite to those of the first embodiment with respect to the input signal. That is, in the drive circuits 60UR, 60UL, 60UD, the larger the difference value between the input value and the sensor output V0 when metal is not detected, the brighter the LEDs 22UR, 22UL, 22D are lit. In the drive circuit 60C, the larger the difference between the input value and the adder output 2V0 when metal is not detected, the brighter the LED 22C is lit.

実施例２において、金属センサ１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬとして、金属を検出していないときに大出力で、金属を検出すると出力値が小さくなる特性のものを採用した場合も、中央判定閾値ＴＨ２と比較回路１６６Ｕ，１６６Ｄの動作を、同様に変更すればよいので、詳細な説明は省略する。 In the second embodiment, even when the metal sensors 120UR, 120UL, 120DR, and 120DL having a characteristic that the output value is large when the metal is not detected and the output value becomes small when the metal is detected, the central determination threshold value TH2 is also adopted. Since the operation of the comparison circuits 166U and 166D may be changed in the same manner, detailed description thereof will be omitted.

特定の説明用の実施例を参照して本発明を説明したが、特許請求の範囲に規定される本発明の技術的範囲を逸脱しないで、上述の実施例に種々の変更・修整を施しうることは、本発明の属する分野の技術者にとって自明であり、このような変更・修整も本発明の技術的範囲に含まれる。 Although the present invention has been described with reference to specific exemplary embodiments, various modifications and modifications may be made to the above embodiments without departing from the technical scope of the invention as defined in the claims. This is obvious to engineers in the field to which the present invention belongs, and such changes and modifications are also included in the technical scope of the present invention.

１０，１１０：探知装置
１２：上側ユニット
１４：下側ユニット
１６：対面板
１８：支柱
２０ＵＲ，２０ＵＬ，２０Ｄ，１２０ＵＲ，１２０ＵＬ，１２０ＤＲ，１２０ＤＬ：金属センサ
２２ＵＲ，１２２ＵＲ：上右ＬＥＤ
２２ＵＬ，１２２ＵＬ：上左ＬＥＤ
２２Ｄ：下ＬＥＤ
１２２ＤＲ：下右ＬＥＤ
１２２ＤＬ：下左ＬＥＤ
２２Ｃ，１２２Ｃ：中央ＬＥＤ
２４：マーク塗布棒
２６：インク含浸スポンジ
２８：可動部材
３０：貫通孔
３２，３４：ガイドピン
３６，３８：ガイド孔
４０，４２：コイルスプリング
４４：開口
５０：壁材
５２：配線ボックス
５４，５６：アルミ箔
６０ＵＲ，６０ＵＬ，６０Ｃ，１６０ＵＲ，１６０ＵＬ，１６０ＤＲ，１６０ＤＬ，１６０Ｃ：駆動回路
６２，６６，１６６Ｕ，１６６Ｄ：比較回路
６４，１６４Ｕ，１６４Ｄ，１６５：加算器
６８，１６８：アンド回路
７０，１７０：常開スイッチ
７２，７４，１７４：選択スイッチ
７６，１７６：閾値切替えダイヤル 10, 110: Detecting device 12: Upper unit 14: Lower unit 16: Facing plate 18: Support column 20UR, 20UL, 20D, 120UR, 120UL, 120DR, 120DL: Metal sensor 22UR, 122UR: Upper right LED
22UL, 122UL: Top left LED
22D: Lower LED
122DR: Bottom right LED
122DL: Bottom left LED
22C, 122C: Central LED
24: Mark application rod 26: Ink impregnated sponge 28: Movable member 30: Through hole 32, 34: Guide pin 36, 38: Guide hole 40, 42: Coil spring 44: Opening 50: Wall material 52: Wiring box 54, 56 : Aluminum foil 60UR, 60UL, 60C, 160UR, 160UL, 160DR, 160DL, 160C: Drive circuit 62, 66, 166U, 166D: Comparison circuit 64, 164U, 164D, 165: Adder 68, 168: And circuit 70, 170 : Always open switch 72, 74, 174: Selection switch 76, 176: Threshold switching dial

Claims

A wiring box (52) arranged on the back side of the wall material (50), the first metal plate (54) on the upper side of the surface facing the wall material, and the second metal plate (56) on the lower side. It is a detection device that detects the wiring box in which the wall material is placed from the front side of the wall material in a non-contact manner.
The first and second metal sensors (20UR, 20UL) arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates, and
A third metal sensor located at equal distances from each of the first and second metal sensors, which corresponds to the distance between the first metal plate and the second metal plate. A third metal sensor (20D) arranged vertically away from the first and second metal sensors by a distance,
A determination means (62, 64, 66, 68) for determining that the first, second, and third metal sensors simultaneously indicate a metal detection state, and
Central notification means (60C, 22C) that notifies the user of the detection of the center of the wiring box according to the judgment result of the determination means.
And have
The judgment means is
An addition means (64) for adding the sensor outputs of the first and second metal sensors, and
A first comparison means (62) for determining whether or not the third metal sensor is in the metal detection state by comparing the output of the third metal sensor with the metal detection threshold TH1.
A second comparison means (66) for determining whether or not the first and second metal sensors are simultaneously in the metal detection state by comparing the output of the addition means with the central determination threshold TH2.
According to the comparison result of the first and second comparison means, when the first, second and third metal sensors are in the metal detection state at the same time, the wiring box is attached to the central notification means (60C, 22C). Control means to notify the user of the central detection of (68)
And have
A detection device characterized by that.

A wiring box (52) arranged on the back side of the wall material (50), the first metal plate (54) on the upper side of the surface facing the wall material, and the second metal plate (56) on the lower side. It is a detection device that detects the wiring box in which the wall material is placed from the front side of the wall material in a non-contact manner.
The first and second metal sensors (20UR, 20UL) arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates, and
A third metal sensor located at equal distances from each of the first and second metal sensors, which corresponds to the distance between the first metal plate and the second metal plate. A third metal sensor (20D) arranged vertically away from the first and second metal sensors by a distance,
A determination means (62, 64, 66, 68) for determining that the first, second, and third metal sensors simultaneously indicate a metal detection state, and
Central notification means (60C, 22C) that notifies the user of the detection of the center of the wiring box according to the judgment result of the determination means.
And have
The judgment means is
An addition means (64) for adding the sensor outputs of the first and second metal sensors, and
By comparing the outputs of the first, second and third metal sensors with the metal detection threshold TH1, it is determined whether or not each of the first, second and third metal sensors is in the metal detection state. As a means of comparison,
According to the comparison result of the comparison means, when the first, second and third metal sensors are in the metal detection state at the same time, the central notification means (60C, 22C) detects the center of the wiring box by the user. Control means (68)
A detector characterized by having and.

The control means (68) responds to the output of the addition means (64) to the central notification means (60C, 22C) when the first, second and third metal sensors are in the metal detection state at the same time. The detection device according to claim 1 or 2 , wherein the notification is output with a high intensity.

The detection device according to any one of claims 1 to 3 , wherein the central notification means has a light emitting means (LED).

Further, it has first, second and third notification means (22UR, 22UL, 22D) for notifying the user of the sensor output of the first, second and third metal sensors (20UR, 20UL, 20D), respectively. The detection device according to any one of claims 1 to 4 , wherein the detection device is characterized.

The detection device according to claim 5 , wherein the first, second, and third notification means (22UR, 22UL, 22D) each have a light emitting means (LED).

A wiring box (52) arranged on the back side of the wall material (50), the first metal plate (54) on the upper side of the surface facing the wall material, and the second metal plate (56) on the lower side. It is a detection device that detects the wiring box in which the wall material is placed from the front side of the wall material in a non-contact manner.
The first and second metal sensors (120UR, 120UL) arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates, and
Third and fourth metal sensors (120DR, 120DL) arranged laterally apart by a distance corresponding to the width of the other of the first and second metal plates, the first metal plate and the metal plate. The third and fourth metal sensors (120DR, 120DL) arranged vertically apart from the first and second metal sensors by a distance corresponding to the distance between the second metal plate and the metal plate.
A determination means (164U, 164D, 166U, 166D, 168) for determining that the first, second, third, and fourth metal sensors simultaneously indicate a metal detection state, and
Central notification means (160C, 122C) that notifies the user of the detection of the center of the wiring box according to the judgment result of the determination means.
And have
The judgment means is
The first adding means (164U) for adding the sensor outputs of the first and second metal sensors, and
A second adding means (164D) for adding the sensor outputs of the third and fourth metal sensors, and
A third adding means (165) for adding the outputs of the first and second adding means, and
With the first comparison means (166U) for determining whether or not both the first and second metal sensors are in the metal detection state by comparing the output of the first addition means with the threshold value TH2. ,
With the second comparison means (166D) for determining whether or not both the third and fourth metal sensors are in the metal detection state by comparing the output of the second addition means with the threshold value TH2. ,
According to the comparison result of the first and second comparison means, when the first, second, third and fourth metal sensors are in the metal detection state at the same time, the central notification means (160C, 122C) is used. Control means for notifying the user of the detection in the center of the wiring box (168)
A detector characterized by having and.

The control means (168) attaches the third addition means (160C, 122C) to the central notification means (160C, 122C) when the first, second, third and fourth metal sensors are in the metal detection state at the same time. The detection device according to claim 7 , wherein the notification is output with an intensity corresponding to the output of 165).

A wiring box (52) arranged on the back side of the wall material (50), the first metal plate (54) on the upper side of the surface facing the wall material, and the second metal plate (56) on the lower side. It is a detection device that detects the wiring box in which the wall material is placed from the front side of the wall material in a non-contact manner.
The first and second metal sensors (120UR, 120UL) arranged laterally apart by a distance corresponding to the width of one of the first and second metal plates, and
Third and fourth metal sensors (120DR, 120DL) arranged laterally apart by a distance corresponding to the width of the other of the first and second metal plates, the first metal plate and the metal plate. The third and fourth metal sensors (120DR, 120DL) arranged vertically apart from the first and second metal sensors by a distance corresponding to the distance between the second metal plate and the metal plate.
A determination means (164U, 164D, 166U, 166D, 168) for determining that the first, second, third, and fourth metal sensors simultaneously indicate a metal detection state, and
Central notification means (160C, 122C) that notifies the user of the detection of the center of the wiring box according to the judgment result of the determination means.
And have
The judgment means is
Addition means (164U, 164D, 165) for adding the sensor outputs of the first, second, third, and fourth metal sensors, and
By comparing the outputs of the first, second, third and fourth metal sensors with the metal detection threshold TH1, each of the first, second, third and fourth metal sensors is in the metal detection state. A comparison means to determine whether or not
According to the comparison result of the comparison means, when the first, second, third and fourth metal sensors are in the metal detection state at the same time, the central notification means (160C, 122C) is connected to the center of the wiring box. Control means for notifying the user of detection (168)
A detector characterized by having and.

When the first, second, third and fourth metal sensors are in the metal detection state at the same time, the control means (168) attaches the addition means (165) to the central notification means (160C, 122C). The detection device according to claim 9 , wherein the notification is output with an intensity corresponding to the output.

The detection device according to any one of claims 7 to 10 , wherein the central notification means has a light emitting means (LED).

Further, the first, second, third and fourth notification means (1st, 2nd, 3rd and 4th notification means) for notifying the user of the sensor output of the 1st, 2nd, 3rd and 4th metal sensors (120UR, 120UL, 120DR, 120DL), respectively. 122UR, 122UL, 122DR, 122DL). The detector according to any one of claims 7 to 11 .

The detection device according to claim 12 , wherein the first, second, third, and fourth notification means (122UR, 122UL, 122DR, 122DL) each have a light emitting means (LED).