JP3418012B2 - Detection head of metal detector - Google Patents
Detection head of metal detectorInfo
- Publication number
- JP3418012B2 JP3418012B2 JP22615294A JP22615294A JP3418012B2 JP 3418012 B2 JP3418012 B2 JP 3418012B2 JP 22615294 A JP22615294 A JP 22615294A JP 22615294 A JP22615294 A JP 22615294A JP 3418012 B2 JP3418012 B2 JP 3418012B2
- Authority
- JP
- Japan
- Prior art keywords
- circumferential groove
- coil
- receiving coils
- sending
- detection head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属検出装置の検出ヘ
ッドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection head of a metal detection device.
【０００２】[0002]
【従来の技術】従来、この種の金属検出装置の検出ヘッ
ドとしては、通常、金属材からなる金属ケース内に収容
され、該検出ヘッドの主要部の構成としては、例えば、
図５に示すものがある。図５において、前記検出ヘッド
１００は、磁束を発生するための送信コイル１０１と、
該磁束と鎖交するように配設された２個の受信コイル１
０２，１０３とからなり、混入金属の検出対象となる被
検査体１０４を、前記送、受信コイル１０１，１０２，
１０３の内側空間１０５を貫通する通路１０６上を矢印
方向に通過させる。2. Description of the Related Art Conventionally, a detection head of this type of metal detection device is usually housed in a metal case made of a metal material, and the main part of the detection head is constructed, for example, as follows.
There is one shown in FIG. In FIG. 5, the detection head 100 includes a transmission coil 101 for generating a magnetic flux,
Two receiving coils 1 arranged so as to interlink with the magnetic flux
02, 103, and the object to be inspected 104, which is the target of detection of mixed metal, is connected to the sending and receiving coils 101, 102,
A passage 106 passing through the inner space 105 of 103 is passed in the direction of the arrow.
【０００３】前記送信コイル１０１は、図示しない高周
波発生装置により励磁され、高周波磁束を発生する。前
記２個の受信コイル１０２，１０３はこの磁束の一部を
等量に鎖交するように配置されている。そして、該２個
の受信コイル１０２，１０３の一端は互いに逆極性に、
すなわち差動的に接続され、それぞれの出力信号Ｖ１，
Ｖ２の差により、前記送、受信コイル１０１，１０２，
１０３の内側空間１０５を通過する被検査体１０４に混
入する金属を検出するものである。The transmitting coil 101 is excited by a high frequency generator (not shown) to generate high frequency magnetic flux. The two receiving coils 102 and 103 are arranged so that a part of the magnetic flux is linked in an equal amount. Then, one ends of the two receiving coils 102 and 103 have opposite polarities,
That is, they are differentially connected and each output signal V1,
Due to the difference in V2, the transmitting and receiving coils 101, 102,
The metal to be mixed into the object 104 to be inspected passing through the inner space 105 of 103 is detected.
【０００４】そして、この検出ヘッド１００は、図６に
示すように、絶縁体からなるコイル枠１０７の外周に前
記送、受信コイル１０１，１０２，１０３が卷回された
後、該コイル枠１０７は図７に示す金属ケース１０８内
に配設される。前記金属ケース１０８の前後方向に設け
られた角形状の貫通穴１０８ａ，１０８ｂの縁部には、
図８の中央横断面図に示すように、該金属ケース１０８
の外側から内側に貫通する複数のねじ穴１０９が設けら
れており、該各ねじ穴１０９には固定ねじ１１０が螺着
されている。この固定ねじ１１０により、前記被検査体
１０４が通過する前後方向から前記２個の受信コイル１
０２，１０３のそれぞれからの出力信号が等しくなるよ
うに前記コイル枠１０７を位置決めし、その後、前記金
属ケース１０８と前記コイル枠１０７との間の空間に、
樹脂系の充填材１１１を充填したものが開示されてい
る。（実開平5ー28984 号公報）In the detection head 100, as shown in FIG. 6, after the sending and receiving coils 101, 102, 103 are wound around the outer circumference of a coil frame 107 made of an insulating material, the coil frame 107 is removed. It is arranged in the metal case 108 shown in FIG. At the edges of the rectangular through holes 108a, 108b provided in the front-back direction of the metal case 108,
As shown in the central cross-sectional view of FIG.
Is provided with a plurality of screw holes 109 penetrating from the outside to the inside, and a fixing screw 110 is screwed into each of the screw holes 109. With this fixing screw 110, the two receiving coils 1 are arranged in the front-back direction through which the DUT 104 passes.
The coil frame 107 is positioned so that the output signals from the respective Nos. 02 and 103 are equal, and thereafter, in the space between the metal case 108 and the coil frame 107,
It is disclosed that the resin-based filler 111 is filled. (Actual Kaihei No. 5-28984 bulletin)
【０００５】ところで、前記コイル枠１０７に卷回され
ている前記送、受信コイル１０１，１０２，１０３は、
図９ないし図１１に示すように、該コイル枠１０７の外
側面に設けられた３個の周溝１１２内にそれぞれ卷回さ
れるとともに、前記周溝１１２に沿って、該周溝１１２
内に短冊状の板部材１１３を挿入、固着することによ
り、前記送、受信コイル１０１，１０２，１０３を該周
溝１１２内に固着させていた。なお、１１４はコイル枠
取付穴である。By the way, the transmitting and receiving coils 101, 102, 103 wound around the coil frame 107 are
As shown in FIG. 9 to FIG. 11, the coil groove 107 is wound into three circumferential grooves 112 provided on the outer side surface of the coil frame 107, and the circumferential groove 112 is formed along the circumferential groove 112.
By inserting and fixing the strip-shaped plate member 113 therein, the sending and receiving coils 101, 102, 103 are fixed in the circumferential groove 112. Reference numeral 114 is a coil frame mounting hole.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前記コ
イル枠１０７の周溝１１２内に前記短冊状の板部材１１
３を挿入するとき、該板部材１１３が、前記周溝１１２
の溝間で、前記送、受信コイル１０１，１０２，１０３
を抑えるだけの充分な摩擦力を確保できるような厚さ
に、製作する必要がある。このため、該板部材１１３の
厚さが厚いときには削ったり、薄いときには絶縁シート
などを挟み込んだりして、その厚さを調整しなければな
らないという問題点があった。However, the strip-shaped plate member 11 is provided in the circumferential groove 112 of the coil frame 107.
3 when the plate member 113 is inserted,
Between the grooves of the transmitting and receiving coils 101, 102, 103
It must be manufactured to a thickness that ensures a sufficient frictional force to suppress Therefore, there is a problem in that the thickness of the plate member 113 must be adjusted by cutting it when it is thick, or by sandwiching an insulating sheet or the like when it is thin.
【０００７】このように、前記板部材１１３の厚さの調
整が必要であるため、作業が難しいばかりでなく、該板
部材１１３が薄板であるため、前記周溝１１２内に挿入
する際に、該板部材１１３をしばしば破損させでしまう
ことがあった。また、挿入の程度の確認が難しく、挿入
の具合によっては、検出ヘッド１００の品質がばらつく
ため、作業者の熟練が必要であるという問題点があっ
た。As described above, since it is necessary to adjust the thickness of the plate member 113, the work is not only difficult, but also because the plate member 113 is a thin plate, when it is inserted into the circumferential groove 112, The plate member 113 was often damaged. Further, it is difficult to confirm the degree of insertion, and the quality of the detection head 100 varies depending on the insertion condition, which requires the skill of the operator.
【０００８】本発明はかかる点に鑑みなされたもので、
その目的は前記問題点を解消し、検出ヘッドの組立に際
し、コイル枠の周溝内に挿入される短冊状の板部材の厚
さの調整が不要で、しかも容易に、送、受信コイルを前
記周溝内に固着させうる金属検出装置の検出ヘッドを提
供することにある。The present invention has been made in view of the above points,
The purpose is to solve the above-mentioned problems, and at the time of assembling the detection head, it is not necessary to adjust the thickness of the strip-shaped plate member inserted into the circumferential groove of the coil frame, and moreover, the sending and receiving coils are easily An object of the present invention is to provide a detection head of a metal detection device that can be fixed in the circumferential groove.
【０００９】本発明の他の目的は、検出ヘッドの組立に
際し、コイル枠の周溝内に挿入される短冊状の板部材が
不要で、しかも容易に、送、受信コイルを前記周溝内に
固着させうる金属検出装置の検出ヘッドを提供すること
にある。Another object of the present invention is to eliminate the need for a strip-shaped plate member to be inserted into the circumferential groove of the coil frame when assembling the detection head, and to easily insert the sending and receiving coils into the circumferential groove. An object is to provide a detection head of a metal detection device that can be fixed.
【００１０】[0010]
【課題を解決するための手段】前記目的を達成するため
の本発明の構成は、金属ケース内に収容され、送信コイ
ルを励磁して磁束を発生させ、該磁束と鎖交する２個の
受信コイルから出力される差信号により、前記送、受信
コイルの内側空間を通過する被検査体に混入する金属を
検出する金属検出装置の検出ヘッドにおいて、次のとお
りである。The structure of the present invention for achieving the above object is such that two receiving units which are housed in a metal case, excite a transmitting coil to generate a magnetic flux, and interlink with the magnetic flux. The detection head of the metal detection device for detecting the metal mixed in the inspected object passing through the inner space of the sending and receiving coils by the difference signal output from the coil is as follows.
【００１１】（１） 絶縁体からなるコイル枠に、前記
送信コイルを間にして、前記２個の受信コイルのそれぞ
れを前記コイル枠の軸心に沿って前後方向に等間隔に、
前記送、受信コイルを卷回するため、前記コイル枠の外
側面に軸心に沿って前後方向に等間隔に設けられた周溝
内に前記送、受信コイルが卷回されるとともに、前記周
溝に沿って該周溝内に挿設される短冊状の板部材と、前
記周溝に沿って複数個設けられ、かつ該周溝に重なり、
さらに該周溝に対して深さ方向に設けられたねじ穴と、
該ねじ穴に螺着される固定ねじとからなるコイル抑え手
段を設け、該抑え手段の前記固定ねじにより、前記周溝
の開口側から前記板部材を介して、前記送、受信コイル
を該周溝内に固着させることを特徴とする。(1) With the transmission coil interposed between a coil frame made of an insulator, each of the two reception coils is equidistant in the front-rear direction along the axis of the coil frame.
In order to wind the sending and receiving coils, the sending and receiving coils are wound in circumferential grooves provided at equal intervals in the front-rear direction along the axis on the outer surface of the coil frame, and Strip-shaped plate members inserted into the circumferential groove along the groove, and a plurality of strip-shaped plate members provided along the circumferential groove and overlapping the circumferential groove,
Further, a screw hole provided in the depth direction with respect to the circumferential groove,
Coil restraining means including a fixing screw screwed into the screw hole is provided, and the sending and receiving coils are wound around the sending and receiving coils from the opening side of the circumferential groove by the fixing screw of the restraining means. It is characterized by being fixed in the groove.
【００１２】（２） 前記（１）において、前記板部材
と前記固定ねじが、絶縁体であることを特徴とする。(2) In the above (1), the plate member and the fixing screw are insulators.
【００１３】（３） 絶縁体からなるコイル枠に、前記
送信コイルを間にして、前記２個の受信コイルのそれぞ
れを前記コイル枠の軸心に沿って前後方向に等間隔に、
前記送、受信コイルを卷回するため、前記コイル枠の外
側面に軸心に沿って前後方向に等間隔に設けられた周溝
内に前記送、受信コイルが卷回されるとともに、前記周
溝に沿って複数個設けられ、かつ該周溝に重なり、さら
に該周溝に対して深さ方向に設けられたねじ穴と、該ね
じ穴に螺着される固定ねじとからなるコイル抑え手段を
設け、該抑え手段の前記固定ねじにより、前記周溝の開
口側から、前記送、受信コイルを該周溝内に固着させる
ことを特徴とする。(3) With the transmission coil interposed between the coil frame made of an insulator, each of the two reception coils is equidistant in the front-rear direction along the axis of the coil frame.
In order to wind the sending and receiving coils, the sending and receiving coils are wound in circumferential grooves provided at equal intervals in the front-rear direction along the axis on the outer surface of the coil frame, and Coil restraining means comprising a plurality of screw holes provided along the groove, overlapping with the peripheral groove, and further provided in the depth direction with respect to the peripheral groove, and a fixing screw screwed into the screw hole. Is provided, and the sending and receiving coils are fixed in the circumferential groove from the opening side of the circumferential groove by the fixing screw of the restraining means.
【００１４】（４） 前記（３）において、前記固定ね
じが、絶縁体であることを特徴とする。(4) In the above item (3), the fixing screw is an insulator.
【００１５】本発明は以上のように構成されているの
で、前記コイル枠の外側面に卷回される前記送、受信コ
イルを、それぞれの周溝内に固着する方法を、短冊状の
板部材と固定ねじ、または固定ねじのみによって固着す
るため、前記板部材の厚さの調整が不要、または前記板
部材自体が不要となる。このため、作業が簡単、容易に
なり、前記板部材の破損のおそれがなくなる。また、抑
えの程度の確認が容易で、検出ヘッドの品質が安定し、
作業者の熟練度が不要になる。Since the present invention is configured as described above, a strip-shaped plate member is used as a method for fixing the sending and receiving coils wound on the outer surface of the coil frame in the respective circumferential grooves. And the fixing screw, or only the fixing screw, does not require adjustment of the thickness of the plate member or the plate member itself. For this reason, the work is simple and easy, and there is no risk of damage to the plate member. In addition, it is easy to check the degree of suppression, the quality of the detection head is stable,
The skill level of the operator becomes unnecessary.
【００１６】[0016]
【実施例】以下、図面に基づいて本発明の好適な実施例
を例示的に詳しく説明する。図１は、本発明の金属検出
装置の検出ヘッドについての一実施例を示す斜視図、図
２は主要部のコイル枠を示す斜視図、図３は図２の III
−III 面矢視による横断面図、図４は図２のIV−IV面矢
視による縦断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a detection head of a metal detection device of the present invention, FIG. 2 is a perspective view showing a coil frame of a main part, and FIG. 3 is III of FIG.
-III is a horizontal sectional view taken along the arrow, and FIG. 4 is a vertical sectional view taken along the line IV-IV in FIG.
【００１７】図１ないし図４において、金属検出装置の
検出ヘッド１は、金属材からなるほぼ直方体形状で、し
かも中央部分に四角形状の貫通穴２ａ，２ｂが形成され
た金属ケース２と、該金属ケース２内に収納されるとと
もに、送、受信コイル３，４が卷回されたコイル枠５と
から構成されている。1 to 4, a detection head 1 of a metal detection device has a substantially rectangular parallelepiped shape made of a metal material, and a metal case 2 having square through holes 2a and 2b formed in a central portion thereof. The coil frame 5 is housed in the metal case 2 and includes the coil frame 5 in which the sending and receiving coils 3 and 4 are wound.
【００１８】前記コイル枠５は、絶縁体、例えばフェノ
ール樹脂系材からなり、しかも中央部分に四角形状の貫
通路５ａが形成された角形状のもので、その外側面に卷
回される前記送信コイル３を間にして、前記２個の受信
コイル４，４のそれぞれを前記コイル枠５の軸心に沿っ
て前後方向に等間隔に卷回するため、前記コイル枠５の
外側面に軸心に沿って前後方向に等間隔に３本の周溝６
を設け、該周溝６内に前記送、受信コイル３，４，４
が、所謂同軸形式に卷回されている。前記周溝６の幅
は、前記送、受信コイル３，４，４が挿入、卷回される
程度の幅である。なお、前記送信コイル３の図示しない
高周波発生装置との接続端子、および前記受信コイル
４，４の外部引出し線との接続端子の図示は省略する。The coil frame 5 is made of an insulating material, for example, a phenol resin material, and has a square shape with a square through passage 5a formed in the center thereof. The transmission frame is wound around the outer surface thereof. Since the two receiving coils 4 and 4 are wound at equal intervals in the front-rear direction along the axial center of the coil frame 5 with the coil 3 interposed therebetween, the axial center is provided on the outer surface of the coil frame 5. 3 circumferential grooves 6 at equal intervals in the front-back direction along the
Are provided, and the sending and receiving coils 3, 4, 4 are provided in the circumferential groove 6.
However, it is wound in a so-called coaxial form. The width of the circumferential groove 6 is such that the sending and receiving coils 3, 4 and 4 are inserted and wound. The connection terminals of the transmission coil 3 to a high-frequency generator (not shown) and the connection terminals of the reception coils 4 and 4 to external lead wires are not shown.
【００１９】そして、前記送、受信コイル３，４，４の
それぞれを、前記周溝６内に固着させるため、コイル抑
え機構として、短冊状の板部材７と、前記コイル枠５の
前記周溝６に沿って設けられる複数個（本実施例では各
周溝６について、１０個）のねじ穴８と、該ねじ穴８に
螺着される固定ねじ９とを使用する。Since each of the sending and receiving coils 3, 4 and 4 is fixed in the circumferential groove 6, a strip-shaped plate member 7 and the circumferential groove of the coil frame 5 are used as a coil restraining mechanism. A plurality of screw holes 8 (10 for each circumferential groove 6 in the present embodiment) provided along 6 and a fixing screw 9 screwed into the screw hole 8 are used.
【００２０】前記短冊状の板部材７は、前記コイル枠５
の前記周溝６に沿って該周溝６内に挿入される部材であ
り、その厚さは前記周溝６の溝幅より僅かに小さくして
いる。また、前記周溝６に沿って設けられる複数個のね
じ穴８については、その中心が該周溝６の中心と一致す
るように、すなわち該周溝６に重ねるようにし、さらに
該周溝６に対して深さ方向に設けられている。この場
合、前記短冊状の板部材７と前記固定ねじ９とは、通常
の絶縁体でよい。The strip-shaped plate member 7 includes the coil frame 5
Is a member to be inserted into the peripheral groove 6 along the peripheral groove 6, and the thickness thereof is slightly smaller than the groove width of the peripheral groove 6. Further, regarding the plurality of screw holes 8 provided along the peripheral groove 6, the centers thereof are aligned with the center of the peripheral groove 6, that is, overlapped with the peripheral groove 6. Is provided in the depth direction. In this case, the strip-shaped plate member 7 and the fixing screw 9 may be ordinary insulators.
【００２１】前記送、受信コイル３，４，４を、前記周
溝６内に固着させるには、前記コイル枠５の前記周溝６
内に前記送、受信コイル３，４，４のそれぞれを卷回し
た後、前記各周溝６の全域に沿って前記短冊状の板部材
７を挿入するとともに、前記周溝６の開口側から前記板
部材７を介して、前記固定ねじ９を前記ねじ穴８に螺合
しながら固着すればよい。To fix the sending and receiving coils 3, 4 and 4 in the circumferential groove 6, the circumferential groove 6 of the coil frame 5 is fixed.
After winding each of the sending and receiving coils 3, 4, and 4 inside, the strip-shaped plate member 7 is inserted along the entire area of each circumferential groove 6, and from the opening side of the circumferential groove 6. The fixing screw 9 may be fixed to the screw hole 8 while being screwed through the plate member 7.
【００２２】次いで、前記コイル枠５を、前記金属ケー
ス２内に収容するときは、該コイル枠５の軸心に沿った
前後方向の前端面５ｃと後端面５ｄを該金属ケース２の
貫通穴２ａ，２ｂが設けられた内壁に近接するように、
収容する。このとき、前記コイル枠５の貫通路５ａは、
該金属ケース２の前記貫通穴２ａ，２ｂに同じ大きさ
で、連通される。Next, when the coil frame 5 is housed in the metal case 2, the front end face 5c and the rear end face 5d in the front-rear direction along the axial center of the coil frame 5 are inserted into the through holes of the metal case 2. To be close to the inner wall where 2a and 2b are provided,
Accommodate. At this time, the through passage 5a of the coil frame 5 is
The metal case 2 is communicated with the through holes 2a and 2b of the same size.
【００２３】前記金属ケース２の角形状の貫通穴２ａの
縁部には、図１に示すように該金属ケース２の外側から
内側に貫通する複数のねじ穴１２が設けられており、該
各ねじ穴１２には固定ねじ１３が螺着され、前記コイル
枠５のコイル枠取付穴１０を押すように、該コイル枠５
を一方向から前記金属ケース２内に固定する。なお、図
１において、前記金属ケース２の角形状の貫通穴２ｂ
（貫通穴２ａの向こう側）の縁部には、同様のねじ穴や
固定ねじは設けられていない。As shown in FIG. 1, a plurality of screw holes 12 penetrating from the outer side to the inner side of the metal case 2 are provided at the edge of the rectangular through hole 2a of the metal case 2, and A fixing screw 13 is screwed into the screw hole 12, and the coil frame 5 is pushed so as to push the coil frame mounting hole 10 of the coil frame 5.
Is fixed in the metal case 2 from one direction. In FIG. 1, the rectangular through hole 2b of the metal case 2 is used.
No similar screw hole or fixing screw is provided on the edge portion (on the other side of the through hole 2a).
【００２４】前記コイル枠５の前記金属ケース２内に収
容後は、前記検出ヘッド１は、前記金属ケース２の内壁
と前記コイル枠５の外側面との間に、樹脂系の充填材を
充填して、相互に堅く固定している。After the coil frame 5 is housed in the metal case 2, the detection head 1 is filled with a resin-based filler between the inner wall of the metal case 2 and the outer surface of the coil frame 5. And they are firmly fixed to each other.
【００２５】また、前記実施例では、短冊状の板部材７
を用いた例について説明したが、前記固定ねじ９によ
り、直接前記送、受信コイル３，４，４を抑えるよう
に、固着することも可能である。In the above embodiment, the strip-shaped plate member 7 is used.
However, it is also possible to fix the sending and receiving coils 3, 4, 4 directly by the fixing screw 9 so as to suppress the sending and receiving coils 3, 4, 4.
【００２６】なお、前記実施例では、同軸形式の検出ヘ
ッドに本発明を適用した例について説明したが、同一面
に並設した２個の受信コイルと１個の送信コイルとを、
被検査体の通過空間を挟んで対向させた対向形式の検出
ヘッドについても、本発明を適用することができる。In the above embodiment, an example in which the present invention is applied to a coaxial type detection head has been described. However, two receiving coils and one transmitting coil arranged in parallel on the same plane are provided.
The present invention can also be applied to a detection head of a facing type, which faces each other with a passage space of the device under test sandwiched therebetween.
【００２７】また、前記した交番磁界だけでなく、直流
電源や永久磁石による一方向の磁界や、該一方向磁界の
強さを所定周波数で変調させた脈流磁界を検査磁界とす
る検出ヘッドについても、本発明を同様に適用すること
ができる。Further, in addition to the alternating magnetic field described above, a detection head using a unidirectional magnetic field by a DC power source or a permanent magnet or a pulsating magnetic field obtained by modulating the strength of the unidirectional magnetic field at a predetermined frequency as an inspection magnetic field Also, the present invention can be similarly applied.
【００２８】なお、本発明の技術は前記実施例における
技術に限定されるものではなく、同様な機能を果たす他
の態様の手段によってもよく、また本発明の技術は前記
構成の範囲内において種々の変更、付加が可能である。Note that the technique of the present invention is not limited to the technique in the above-described embodiment, and may be implemented by means of another mode that achieves the same function. Can be changed or added.
【００２９】[0029]
【発明の効果】以上の説明から明らかなように本発明の
金属検出装置の検出ヘッドによれば、請求項１、２につ
いては、絶縁体からなるコイル枠の外側面に設けられた
周溝内に前記送、受信コイルが卷回されるとともに、前
記周溝に沿って該周溝内に挿設される短冊状の板部材
と、前記周溝に沿って複数個設けられ、かつ該周溝に重
なり、さらに該周溝に対して深さ方向に設けられたねじ
穴と、該ねじ穴に螺着される固定ねじとからなるコイル
抑え手段を設け、該抑え手段の前記固定ねじにより、前
記周溝の開口側から前記板部材を介して、前記送、受信
コイルを該周溝内に固着させるので、コイル枠の周溝内
に挿入される短冊状の板部材の厚さの調整が不要で、し
かも容易に、送、受信コイルを前記周溝内に固着させる
ことができる。As is apparent from the above description, according to the detection head of the metal detection device of the present invention, in the first and second aspects, inside the circumferential groove provided on the outer surface of the coil frame made of an insulator. A strip-shaped plate member which is wound around the transmitting and receiving coils and is inserted into the circumferential groove along the circumferential groove; and a plurality of strip-shaped plate members provided along the circumferential groove. And a coil restraining means comprising a screw hole formed in the depth direction with respect to the circumferential groove and a fixing screw screwed into the screw hole, and the fixing screw of the restraining means allows Since the sending and receiving coils are fixed in the circumferential groove from the opening side of the circumferential groove via the plate member, it is not necessary to adjust the thickness of the strip-shaped plate member inserted in the circumferential groove of the coil frame. In addition, the sending and receiving coils can be easily fixed in the circumferential groove.
【００３０】請求項３、４については、絶縁体からなる
コイル枠の外側面に設けられた周溝内に前記送、受信コ
イルが卷回されるとともに、前記周溝に沿って複数個設
けられ、かつ該周溝に重なり、さらに該周溝に対して深
さ方向に設けられたねじ穴と、該ねじ穴に螺着される固
定ねじとからなるコイル抑え手段を設け、該抑え手段の
前記固定ねじにより、前記周溝の開口側から、前記送、
受信コイルを該周溝内に固着させるので、コイル枠の周
溝内に挿入される短冊状の板部材が不要で、しかも容易
に、送、受信コイルを前記周溝内に固着させることがで
きる。In the third and fourth aspects, the sending and receiving coils are wound in a circumferential groove provided on the outer surface of the coil frame made of an insulating material, and a plurality of coils are provided along the circumferential groove. And a coil restraining means including a screw hole that overlaps the circumferential groove and is provided in the depth direction with respect to the circumferential groove, and a fixing screw that is screwed into the screw hole. From the opening side of the peripheral groove by the fixing screw, the feeding,
Since the receiving coil is fixed in the peripheral groove, a strip-shaped plate member inserted in the peripheral groove of the coil frame is unnecessary, and the sending and receiving coils can be fixed in the peripheral groove easily. .
【００３１】また、作業者の熟練によらず、一定品質の
検出ヘッドを短時間で製造できるという効果を奏する。Further, it is possible to manufacture a detection head of constant quality in a short time regardless of the skill of the operator.
【図１】本発明の金属検出装置の検出ヘッドについての
一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of a detection head of a metal detection device of the present invention.
【図２】主要部のコイル枠を示す斜視図である。FIG. 2 is a perspective view showing a coil frame of a main part.
【図３】図２の III−III 面矢視による横断面図であ
る。3 is a cross-sectional view taken along the line III-III of FIG.
【図４】図２のIV−IV面矢視による縦断面図である。4 is a vertical sectional view taken along the line IV-IV of FIG.
【図５】従来の金属検出装置の検出ヘッドの同軸形式検
出ヘッドの検出原理を説明するための図である。FIG. 5 is a diagram for explaining a detection principle of a coaxial type detection head of a detection head of a conventional metal detection device.
【図６】図５の検出ヘッドの主要構成を示す図である。6 is a diagram showing a main configuration of the detection head of FIG.
【図７】従来の金属検出装置の検出ヘッドを示す斜視図
である。FIG. 7 is a perspective view showing a detection head of a conventional metal detection device.
【図８】図７の中央における横断面図である。8 is a cross-sectional view at the center of FIG.
【図９】従来のコイル枠の構成を示す斜視図である。FIG. 9 is a perspective view showing a configuration of a conventional coil frame.
【図１０】図９の X−X 面矢視による横断面図である。10 is a cross-sectional view taken along the line XX of FIG.
【図１１】図９のXI−XI面矢視による縦断面図である。11 is a vertical sectional view taken along the line XI-XI of FIG.
１ 検出ヘッド ２ 金属ケース ２ａ，２ｂ 貫通穴 ３ 送信コイル ４ 受信コイル ５ コイル枠 ５ａ 貫通路 ６ 周溝 ７ 板部材（短冊状） ８ ねじ穴 ９ 固定ねじ １０４ 被検査体 1 Detection head 2 metal cases 2a, 2b through hole 3 transmitter coils 4 receiver coil 5 coil frame 5a through passage 6 circumferential groove 7 Plate member (Strip shape) 8 screw holes 9 fixing screws 104 Inspection object
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01V 3/10 G01N 27/72 G01V 3/11 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) G01V 3/10 G01N 27/72 G01V 3/11
Claims (4)
励磁して磁束を発生させ、該磁束と鎖交する２個の受信
コイルから出力される差信号により、前記送、受信コイ
ルの内側空間を通過する被検査体に混入する金属を検出
する金属検出装置の検出ヘッドにおいて、 絶縁体からなるコイル枠に、前記送信コイルを間にし
て、前記２個の受信コイルのそれぞれを前記コイル枠の
軸心に沿って前後方向に等間隔に、前記送、受信コイル
を卷回するため、前記コイル枠の外側面に軸心に沿って
前後方向に等間隔に設けられた周溝内に前記送、受信コ
イルが卷回されるとともに、前記周溝に沿って該周溝内
に挿設される短冊状の板部材と、前記周溝に沿って複数
個設けられ、かつ該周溝に重なり、さらに該周溝に対し
て深さ方向に設けられたねじ穴と、該ねじ穴に螺着され
る固定ねじとからなるコイル抑え手段を設け、該抑え手
段の前記固定ねじにより、前記周溝の開口側から前記板
部材を介して、前記送、受信コイルを該周溝内に固着さ
せることを特徴とする金属検出装置の検出ヘッド。1. An inner space of the transmitting and receiving coils is housed in a metal case to excite a transmitting coil to generate a magnetic flux, and a difference signal output from two receiving coils interlinking with the magnetic flux. In a detection head of a metal detection device for detecting a metal mixed in an object to be inspected that passes through, a coil frame made of an insulator is provided between the transmission coil and each of the two reception coils. In order to wind the sending and receiving coils at equal intervals in the front-rear direction along the axis, the sending coil is provided in a circumferential groove provided on the outer surface of the coil frame along the axis at equal intervals in the front-rear direction. A plurality of strip-shaped plate members are provided along the circumferential groove, and the receiving coil is wound, the strip-shaped plate member is inserted into the circumferential groove, and overlaps the circumferential groove. Further, with a screw hole provided in the depth direction with respect to the circumferential groove, Coil restraining means including a fixing screw screwed into the screw hole is provided, and the sending and receiving coils are wound around the sending and receiving coils from the opening side of the circumferential groove by the fixing screw of the restraining means. A detection head for a metal detection device, which is fixed in a groove.
あることを特徴とする請求項１に記載の金属検出装置の
検出ヘッド。2. The detection head of a metal detection device according to claim 1, wherein the plate member and the fixing screw are insulators.
励磁して磁束を発生させ、該磁束と鎖交する２個の受信
コイルから出力される差信号により、前記送、受信コイ
ルの内側空間を通過する被検査体に混入する金属を検出
する金属検出装置の検出ヘッドにおいて、 絶縁体からなるコイル枠に、前記送信コイルを間にし
て、前記２個の受信コイルのそれぞれを前記コイル枠の
軸心に沿って前後方向に等間隔に、前記送、受信コイル
を卷回するため、前記コイル枠の外側面に軸心に沿って
前後方向に等間隔に設けられた周溝内に前記送、受信コ
イルが卷回されるとともに、前記周溝に沿って複数個設
けられ、かつ該周溝に重なり、さらに該周溝に対して深
さ方向に設けられたねじ穴と、該ねじ穴に螺着される固
定ねじとからなるコイル抑え手段を設け、該抑え手段の
前記固定ねじにより、前記周溝の開口側から、前記送、
受信コイルを該周溝内に固着させることを特徴とする金
属検出装置の検出ヘッド。3. An inner space of the transmitting and receiving coils, which is housed in a metal case, excites the transmitting coil to generate a magnetic flux, and generates a magnetic flux by a difference signal output from two receiving coils interlinking with the magnetic flux. In a detection head of a metal detection device for detecting a metal mixed in an object to be inspected that passes through, a coil frame made of an insulator is provided between the transmission coil and each of the two reception coils. In order to wind the sending and receiving coils at equal intervals in the front-rear direction along the axis, the sending coil is provided in a circumferential groove provided on the outer surface of the coil frame along the axis at equal intervals in the front-rear direction. A plurality of receiving coils are wound, and a plurality of receiving coils are provided along the circumferential groove, overlap with the circumferential groove, and are provided in a depth direction with respect to the circumferential groove; Coil holding means consisting of a fixing screw to be screwed Provided, by the fixing screws 該抑 example means, from the opening side of the circumferential groove, said feed,
A detection head of a metal detection device, wherein a receiving coil is fixed in the circumferential groove.
徴とする請求項３に記載の金属検出装置の検出ヘッド。4. The detection head of the metal detection device according to claim 3, wherein the fixing screw is an insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22615294A JP3418012B2 (en) | 1994-09-21 | 1994-09-21 | Detection head of metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22615294A JP3418012B2 (en) | 1994-09-21 | 1994-09-21 | Detection head of metal detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0894763A JPH0894763A (en) | 1996-04-12 |
| JP3418012B2 true JP3418012B2 (en) | 2003-06-16 |
Family
ID=16840680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22615294A Expired - Fee Related JP3418012B2 (en) | 1994-09-21 | 1994-09-21 | Detection head of metal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3418012B2 (en) |
-
1994
- 1994-09-21 JP JP22615294A patent/JP3418012B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0894763A (en) | 1996-04-12 |
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