JP4943208B2 - Specimen for metal detector - Google Patents

Specimen for metal detector Download PDF

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JP4943208B2
JP4943208B2 JP2007091801A JP2007091801A JP4943208B2 JP 4943208 B2 JP4943208 B2 JP 4943208B2 JP 2007091801 A JP2007091801 A JP 2007091801A JP 2007091801 A JP2007091801 A JP 2007091801A JP 4943208 B2 JP4943208 B2 JP 4943208B2
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metal
holding member
shape
metal piece
metal detector
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JP2008249520A (en
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裕幸 西尾
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アンリツ産機システム株式会社
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Description

本発明は、金属検出機用の試験体に関する。特に、食品等の中に混入した異物を検出する金属検出機用の試験体に関する。   The present invention relates to a specimen for a metal detector. In particular, the present invention relates to a specimen for a metal detector that detects foreign matter mixed in food or the like.

一般に図1に示すように、金属検出機1の金属検出性能を試験するために、試験片(テストピースとも称する)2を試験片単体でまたは検査対象とする食品等の物品と共に金属検出機1の検出部3の中を搬送手段4によって通過させ、金属検出機1の検出信号レベルが所定の範囲となることを確認することにより、金属検出性能の試験が行われている。例えば金属物の通過による磁界変動によってその金属物の存在を検出する金属検出機1は、金属検出機1における高さ方向の通過位置や通過向き(特に細長い針状物に対して)によって検出性能が異なることが知られている(例えば、特許文献1および特許文献2参照)。   In general, as shown in FIG. 1, in order to test the metal detection performance of the metal detector 1, the metal detector 1 is a test piece (also referred to as a test piece) 2 alone or together with an article such as food to be inspected. The metal detection performance is tested by passing the detection unit 3 through the transport unit 4 and confirming that the detection signal level of the metal detector 1 falls within a predetermined range. For example, the metal detector 1 that detects the presence of a metal object by a magnetic field fluctuation caused by the passage of the metal object has a detection performance depending on the position of the metal detector 1 in the height direction and the direction of the passage (especially for an elongated needle-like object). Are known to be different (see, for example, Patent Document 1 and Patent Document 2).

従来、金属検出機1の金属検出性能の試験に対しては、図2に示すように、平板状の樹脂に所定性状(材質、形状、サイズ)の金属片5を埋設もしくは固着した試験片2が広く用いられている(例えば、特許文献3参照)。特に図1に示した搬送手段4によって物品を搬送しながら検査する金属検出機1について、金属片5の高さに応じた検出性能を種々に試験するときに、平板状の試験片2を発泡スチロール等の樹脂板材でかさ上げすることにより金属片5の高さを変更して試験が行われていた。
特開2006−058113号公報([0006]) 特開平9−080162号公報([0014]〜[0018]) 特開2007−47086号公報
Conventionally, for the metal detection performance test of the metal detector 1, as shown in FIG. 2, a test piece 2 in which a metal piece 5 having a predetermined property (material, shape, size) is embedded or fixed in a flat resin. Is widely used (see, for example, Patent Document 3). In particular, for the metal detector 1 that inspects while conveying an article by the conveying means 4 shown in FIG. 1, when the detection performance according to the height of the metal piece 5 is variously tested, the flat test piece 2 is made of polystyrene foam. The test was performed by changing the height of the metal piece 5 by raising the resin plate material such as the like.
JP 2006-058113 A ([0006]) JP-A-9-080162 ([0014] to [0018]) JP 2007-47086 A

しかしながら、試験時において高さ方向の通過位置ごとに発泡スチロール等の樹脂板材で試験片2をかさ上げしていた場合には、高さ方向の通過位置が不正確になり、金属検出機1の検出性能を高精度に測定することが困難であった。特に食品業界にあっては、食品中への異物混入を防止するため、金属検出機1の検出性能を高精度に測定することは重要な課題となっている。   However, when the test piece 2 is raised with a resin plate material such as polystyrene foam for each passing position in the height direction during the test, the passing position in the height direction becomes inaccurate, and the metal detector 1 detects it. It was difficult to measure performance with high accuracy. Especially in the food industry, it is an important issue to measure the detection performance of the metal detector 1 with high accuracy in order to prevent foreign matter from being mixed into the food.

また、発泡スチロール等のかさ上げ部材を生産ラインに持ち込むことは、かさ上げ部材の一部が欠けるなどして異物混入の原因となり、衛生管理上望ましくない。さらに、かさ上げ部材の管理が不十分であると、かさ上げ部材にゴミ等が付着して不衛生になるばかりではなく、ゴミに金属粒等が含まれていると検出性能の試験結果自体が信頼性のないものとなり、金属検出機1の検出性能に対する高精度な測定の妨げとなっていた。   In addition, it is not desirable in terms of hygiene management to bring a raising member such as styrene foam into the production line, which causes a part of the raising member to be lost and causes foreign matters to be mixed. Furthermore, if the raising member is not sufficiently managed, not only does the dirt rise on the raising member and it becomes unsanitary, but if the dust contains metal particles, the detection performance test results themselves. It became unreliable and hindered high-precision measurement with respect to the detection performance of the metal detector 1.

本発明は、上述のような従来技術の課題に鑑みてなされたもので、金属検出機の検出性能を高精度に測定するためのテストピースを提供することを目的とする。   The present invention has been made in view of the problems of the prior art as described above, and an object thereof is to provide a test piece for measuring the detection performance of a metal detector with high accuracy.

本発明は、金属検出機の性能検査に用いる金属片と、該金属片を保持する保持部材と、を備える金属検出機用の試験体であって、前記保持部材を形成する複数の面の形状が多角形の形状をなし、前記複数の面のうち少なくとも2つの面が検査時に前記金属検出機に載置されるための基準面とされ、前記金属片が、前記基準面から相互に異なる高さに保持されており、前記金属片の前記基準面からの高さを示す識別手段を備えたことを特徴とする金属検出機用の試験体である。 The present invention is a test body for a metal detector comprising a metal piece used for performance inspection of a metal detector and a holding member for holding the metal piece, and the shape of a plurality of surfaces forming the holding member Has a polygonal shape, and at least two of the plurality of surfaces serve as a reference surface for placement on the metal detector during inspection, and the metal pieces have heights different from each other from the reference surface. This is a specimen for a metal detector, characterized in that it is provided with an identification means that is held by a height and indicates the height of the metal piece from the reference surface .

この試験体を使用することにより、金属検出機の検出性能を高精度に測定できる。また、金属検出機に載置させる基準面を変えることで、金属検出機に対する高さ方向の通過位置を変えることができ、高さに応じて試験体を変えて検査の作業を行う必要がないため、作業の手間を省くことができ、試験体の管理が容易になる。   By using this specimen, the detection performance of the metal detector can be measured with high accuracy. Also, by changing the reference plane to be placed on the metal detector, the passing position in the height direction with respect to the metal detector can be changed, and there is no need to perform inspection work by changing the specimen according to the height. Therefore, the labor of work can be saved and management of the specimen becomes easy.

さらに発泡スチロール等のかさ上げ部材を生産ラインに持ち込む必要がなくなり、衛生管理上望ましく、金属粒等のゴミが紛れ込む余地が少なくなり、検出性能の試験結果の信頼性が向上する。
さらに試験体の中に保持されている金属片の高さ等の内容がわかる。
Further, it is not necessary to bring a raising member such as polystyrene foam into the production line, which is desirable for hygiene management, and there is less room for dust such as metal particles to be mixed in, thereby improving the reliability of the detection performance test result.
Furthermore, the contents such as the height of the metal piece held in the specimen can be understood.

また本発明は、前記保持部材を形成する複数の面の形状が略正多角形である金属検出機用の試験体である。   Moreover, this invention is a test body for metal detectors whose shape of the several surface which forms the said holding member is a substantially regular polygon.

この場合は、保持部材の基準面が正多角形の形状と略同じなので、どのような向きに試験体を金属検出機の搬送コンベア等に載置したとしても、試験体は倒れにくい。   In this case, since the reference surface of the holding member is substantially the same as the regular polygonal shape, the test body is unlikely to fall down regardless of the orientation of the test body placed on the conveyor of the metal detector.

また本発明は、前記保持部材が、前記基準面のうちの1つを含む仮想平面が他の少なくとも1つの基準面を含む仮想平面と交わる形状である金属検出機用の試験体である。   Moreover, this invention is a test body for metal detectors in which the holding member has a shape in which a virtual plane including one of the reference planes intersects a virtual plane including at least one other reference plane.

この場合は、基準面は仮想平面により規定できるので、本発明は、保持部材の実際の面にとらわれず、実施する上で保持部材の肉抜きをして、試験体の質量を軽減させたり、材料のコストを下げたりすることができる。また試験体を反転させなくても、保持部材の基準面を容易に変えることができる。   In this case, since the reference plane can be defined by a virtual plane, the present invention is not constrained by the actual surface of the holding member, and when implemented, the holding member is thinned to reduce the mass of the specimen, The cost of the material can be reduced. Further, the reference surface of the holding member can be easily changed without inverting the specimen.

また本発明は、前記金属片の形状が柱状であり、前記識別手段が前記金属片の長軸方向をも示す金属検出機用の試験体である。   Moreover, this invention is a test body for metal detectors in which the shape of the metal piece is columnar and the identification means also indicates the long axis direction of the metal piece.

この場合は、針状の異物に対応でき、金属片の方向による感度も容易に測定できる。   In this case, it is possible to deal with needle-like foreign matters, and the sensitivity depending on the direction of the metal piece can be easily measured.

また本発明は、前記保持部材が透明または半透明の樹脂である金属検出機用の試験体である。   Moreover, this invention is a test body for metal detectors in which the holding member is a transparent or translucent resin.

この場合は、保持部材に保持されている金属片の位置や形状等を目視できる。   In this case, the position and shape of the metal piece held by the holding member can be visually observed.

また本発明は、前記識別手段が前記金属片の形状を示す形状を有する金属検出機用の試験体である。   Moreover, this invention is a test body for metal detectors in which the said identification means has the shape which shows the shape of the said metal piece.

この場合は、視覚的・直感的に保持部材に保持されている金属片の内容がわかる。   In this case, the contents of the metal piece held on the holding member can be understood visually and intuitively.

本発明によれば、金属検出機の試験時に本発明に係る金属検出機用の試験体を用いることにより、金属検出機の検出性能を高精度に測定することができる。   ADVANTAGE OF THE INVENTION According to this invention, the detection performance of a metal detector can be measured with high precision by using the test body for metal detectors concerning this invention at the time of the test of a metal detector.

以下、本発明に係る金属検出機用の試験体の実施の形態について、図面を用いて説明する。   Hereinafter, embodiments of a specimen for a metal detector according to the present invention will be described with reference to the drawings.

(第1の実施の形態)
図3は本発明の第1の実施の形態に係る金属検出機用の試験体を示す斜視図である。本発明の実施の形態に係る金属検出機用の試験体10は、金属検出機の性能検査に用いる金属片5と、金属片5を保持する保持部材20と、金属片5の性状を示す識別手段30とを備えている。
(First embodiment)
FIG. 3 is a perspective view showing a specimen for a metal detector according to the first embodiment of the present invention. The test body 10 for a metal detector according to an embodiment of the present invention includes a metal piece 5 used for performance inspection of the metal detector, a holding member 20 that holds the metal piece 5, and an identification that indicates the properties of the metal piece 5. Means 30.

金属片5は球状であり、典型的な異物の一形状を模擬している。   The metal piece 5 is spherical and simulates one shape of a typical foreign object.

保持部材20は、図4に示すように、保持部材20を形成する複数の面の形状が多角形の形状をなし、この複数の面のうち少なくとも2つの面が検査時に金属検出機に載置されるための基準面(B1、B2、B3)を有し、基準面(B1、B2、B3)から各々相互に異なる高さ(h1、h2、h3)に金属片5を保持するようになっている。そして、保持部材20は、略立方体であり、保持部材20を形成する複数の面(B1、B2、B3)の形状が略正多角形である正方形の形状を有している。   As shown in FIG. 4, the holding member 20 has a polygonal shape as a plurality of surfaces forming the holding member 20, and at least two of the plurality of surfaces are placed on a metal detector at the time of inspection. The metal pieces 5 are held at different heights (h1, h2, h3) from the reference surfaces (B1, B2, B3). ing. And the holding member 20 is a substantially cube, and has the square shape whose shape of the some surface (B1, B2, B3) which forms the holding member 20 is a substantially regular polygon.

また、図5に示すように、保持部材20の図形重心Gが、例えば基準面B1の図形中心Cから略垂直方向にあり、基準面B1の図形中心Cと保持部材20の図形重心Gとの距離gが、基準面B1の図形中心Cを通り基準面B1の辺a1および辺a4と交わる線分の長さdの略半分になるようになっている。すなわち、保持部材20をある平面に置いた場合に、その平面の傾きをどの方向に略45度傾けても、保持部材20が略倒れ始める立体形状になっている。要するに、保持部材20は、ある基準面に対して安定で、その基準面からの所定の高さを有するようになっている。なお上述の線分は、図形中心Cを通り基準面B1の辺a1、a2、a3、a4のいずれかと交わっていればよい。したがって線分の長さdは、略辺a1、a2、a3、a4のいずれかの長さから基準面B1の対角線の長さになる。   Further, as shown in FIG. 5, the figure gravity center G of the holding member 20 is, for example, substantially perpendicular to the figure center C of the reference plane B1, and the figure center C of the reference plane B1 and the figure gravity center G of the holding member 20 The distance g is approximately half the length d of the line segment passing through the figure center C of the reference plane B1 and intersecting the sides a1 and a4 of the reference plane B1. In other words, when the holding member 20 is placed on a certain plane, the holding member 20 has a three-dimensional shape that begins to fall substantially no matter which direction the inclination of the plane is inclined by approximately 45 degrees. In short, the holding member 20 is stable with respect to a certain reference surface and has a predetermined height from the reference surface. Note that the above-described line segment only needs to cross any one of the sides a1, a2, a3, and a4 of the reference plane B1 through the figure center C. Therefore, the length d of the line segment is the length of the diagonal line of the reference plane B1 from the length of any of the substantially sides a1, a2, a3, and a4.

また図5に示したように、保持部材20が、基準面B1、B2、B3のうちの1つ(例えば基準面B1)を含む仮想平面P1が他の少なくとも1つの基準面(例えば基準面B2)を含む仮想平面P2と交わる形状であるように形成されている。   Further, as shown in FIG. 5, the virtual plane P1 including the holding member 20 including one of the reference surfaces B1, B2, and B3 (for example, the reference surface B1) is at least one other reference surface (for example, the reference surface B2). ) Including an imaginary plane P2 including the shape.

識別手段30は、図6に示すように例えばラベル30a、30b、30cであり、金属片5の性状である金属片5の材質や形状やサイズや基準面B1、B2、B3からの高さ等を示すようになっている。そして金属片5の性状が表示された面を上にするように、例えばラベル30aが貼られた面を上にして、試験体10を置くと、基準面B1から金属片5までの高さが高さh1になるようになっている。   As shown in FIG. 6, the identification means 30 is, for example, labels 30a, 30b, 30c. The material, shape and size of the metal piece 5, which is the property of the metal piece 5, the height from the reference planes B1, B2, B3, etc. It has come to show. And when the test body 10 is placed, for example, with the surface on which the label 30a is attached facing up so that the surface on which the properties of the metal piece 5 are displayed is, the height from the reference plane B1 to the metal piece 5 is increased. The height is h1.

次に、金属片5のサイズは、直径0.5mmである。なお金属片5のサイズは、本実施の形態に限定されず、さらに小さくても大きくてもよい。   Next, the size of the metal piece 5 is 0.5 mm in diameter. The size of the metal piece 5 is not limited to the present embodiment, and may be smaller or larger.

保持部材20のサイズは、一辺の長さが50mmである。なお保持部材20のサイズは、金属検出機の大きさにより決まり、例えば搬送路からの高さが後述するサーチコイルの中心付近の高さをカバーできることが好ましい。   As for the size of the holding member 20, the length of one side is 50 mm. Note that the size of the holding member 20 is determined by the size of the metal detector. For example, it is preferable that the height from the conveyance path can cover the height near the center of the search coil described later.

識別手段30であるラベル30a、30b、30cの厚さは、保持部材20の基準面から金属片5までの距離に対して、十分薄くなっている。   The thickness of the labels 30 a, 30 b, and 30 c that are the identification means 30 is sufficiently thin with respect to the distance from the reference surface of the holding member 20 to the metal piece 5.

次に、金属片5の材質は、例えば鉄やステンレスであり、他の金属でもよく、食品等の検査対象に混入しうる材質が好ましい。   Next, the material of the metal piece 5 is, for example, iron or stainless steel, and may be other metals, and is preferably a material that can be mixed into an inspection object such as food.

保持部材20は、透明または半透明の樹脂で非金属の材料からできている。非金属の材料としては、例えば、ポリアミド系合成高分子、アクリル等が挙げられ、欠けにくいといった耐摩耗性があり、軽くて、加工しやすい材質が好ましい。さらに金属片5を保持する位置を安定させるため、外力や温度に対して変形しにくい材質が好ましい。なお、欠けにくいように、保持部材20は面取りされている。   The holding member 20 is made of a non-metallic material made of a transparent or translucent resin. Non-metallic materials include, for example, polyamide-based synthetic polymers, acrylics, etc., and are preferably materials that have wear resistance such as being hard to chip, are light and easy to process. Further, in order to stabilize the position where the metal piece 5 is held, a material that is not easily deformed by an external force or temperature is preferable. The holding member 20 is chamfered so as not to be chipped.

ラベル30a、30b、30cは、シート状の樹脂製であり、洗浄や摩擦に対して剥がれにくいように保持部材20に接着剤により貼られている。   The labels 30a, 30b, and 30c are made of sheet-like resin, and are affixed to the holding member 20 with an adhesive so that the labels 30a, 30b, and 30c do not easily peel off due to cleaning or friction.

次に、金属片5の埋め込み方を説明する。   Next, how to embed the metal piece 5 will be described.

まず、樹脂製の保持部材20に対して、金属片5を埋め込む所定の位置からの距離が最も短い基準面から、金属片5の直径と略同じ径のドリル等でその距離分の深さの穴を開ける。接着剤等を穴の底に少し入れ、金属片5をその穴に落とし金属片5の位置を固定する。さらに接着剤を詰め込み、金属片5を保持部材20の中に埋設させる。このように容易に金属片5を所定の位置に保持できるようになっている。   First, with respect to the resin-made holding member 20, from a reference surface having the shortest distance from a predetermined position in which the metal piece 5 is embedded, a depth corresponding to that distance is obtained with a drill having a diameter substantially the same as the diameter of the metal piece 5. Make a hole. A small amount of adhesive or the like is put in the bottom of the hole, the metal piece 5 is dropped into the hole, and the position of the metal piece 5 is fixed. Further, an adhesive is packed and the metal piece 5 is embedded in the holding member 20. Thus, the metal piece 5 can be easily held at a predetermined position.

次に、本発明の実施の形態に係る金属検出機用の試験体を利用する金属検出機の一例を示す。   Next, an example of a metal detector that uses a test body for a metal detector according to an embodiment of the present invention will be described.

図7は、試験体を用いる金属検出機の概要を示す斜視図である。金属検出機40は、食品等の検査対象41を矢印方向に搬送する搬送コンベア42と、搬送コンベア42の搬送路42a上を搬送される食品等の検査対象41に混入している金属異物を検出する検出部43と、検出部43から出力された検出信号に基づいて金属異物の有無を判定する制御部(図示せず)と、金属検出機40を操作するための所定の操作入力を行うと共に情報の表示等を行う操作表示部(図示せず)とを備える。   FIG. 7 is a perspective view showing an outline of a metal detector using a test body. The metal detector 40 detects a metal foreign matter mixed in the inspection object 41 such as a food conveyed on the conveyance path 42a of the conveyance conveyor 42 and the conveyance conveyor 42 that conveys the inspection object 41 such as food in the arrow direction. Performing a predetermined operation input for operating the metal detector 40, a control unit (not shown) for determining the presence or absence of a metal foreign object based on the detection signal output from the detection unit 43, An operation display unit (not shown) for displaying information and the like.

検出部43は、図8に示すように搬送コンベア42を囲むように配置されていて、その内部に検査対象41中の磁気を検出するサーチコイル44を有している。このサーチコイル44の中心付近、すなわちサーチコイル44の高さHの中間辺りが最も感度が低い。   As shown in FIG. 8, the detection unit 43 is disposed so as to surround the transport conveyor 42, and has a search coil 44 that detects magnetism in the inspection object 41. The sensitivity is lowest near the center of the search coil 44, that is, in the middle of the height H of the search coil 44.

金属検出機40は、搬送コンベア42により搬送されてきた検査対象41が検出部43のトンネル中を通過し検出部43の中に金属がある場合には、検出部43のサーチコイル44によって信号を検出する。そして金属検出機40は、その信号に基づき制御部により金属異物の有無を判定し、その結果を操作表示部に表示するようになっている。   When the inspection object 41 conveyed by the conveyor 42 passes through the tunnel of the detection unit 43 and there is metal in the detection unit 43, the metal detector 40 sends a signal by the search coil 44 of the detection unit 43. To detect. And the metal detector 40 determines the presence or absence of a metal foreign material by a control part based on the signal, and displays the result on the operation display part.

次に、金属検出機用の試験体の使用法について図面に基づき説明する。   Next, the usage of the test body for a metal detector will be described with reference to the drawings.

まず、所望の金属片5の高さと、検査対象41の大きさ等に適した金属片5の大きさと、製造工程で混入しそうな金属の材質とを含む試験体10を選択する。このとき、識別手段30であるラベル30a、30b、30cにより、金属片5の性状を確認する。なお保持部材20により保持されている金属片5の高さの選択については後述する。   First, the test body 10 including the height of the desired metal piece 5, the size of the metal piece 5 suitable for the size of the inspection object 41, and the metal material likely to be mixed in the manufacturing process is selected. At this time, the property of the metal piece 5 is confirmed by the labels 30a, 30b and 30c which are the identification means 30. The selection of the height of the metal piece 5 held by the holding member 20 will be described later.

そして図7に示したように、検査対象41が搬送されている搬送コンベア42の搬送路42a上に試験体10を載置する。このとき、検査を行いたい高さが表示されたラベル30a等が貼られた面を上にするように、試験体10を搬送路42a上に載置する。例えば、図9(a)に示すように金属片5の高さが高さh1=10mmになるように載置する。ここで、搬送コンベア42を運転させたまま、試験体10は載置される。   And as shown in FIG. 7, the test body 10 is mounted on the conveyance path 42a of the conveyance conveyor 42 in which the test object 41 is conveyed. At this time, the test body 10 is placed on the conveyance path 42a so that the surface on which the label 30a or the like indicating the height to be inspected is affixed. For example, as shown in FIG. 9A, the metal piece 5 is placed so that the height h1 = 10 mm. Here, the test body 10 is placed while the transport conveyor 42 is operated.

そして試験体10は検査対象41と共に搬送され、検出部43の中を通過する。検出部43のサーチコイル44の感度が正常であるならば、金属片5が検出される。検出されない場合は、搬送コンベア42を止め、サーチコイル44の感度を調節し、再度、試験体10を通過させ調整を行う。   Then, the test body 10 is transported together with the inspection object 41 and passes through the detection unit 43. If the sensitivity of the search coil 44 of the detection unit 43 is normal, the metal piece 5 is detected. If not detected, the conveyor 42 is stopped, the sensitivity of the search coil 44 is adjusted, and the test body 10 is again passed through for adjustment.

これらの調整動作を他の金属片5の高さでも行う。例えば、図9(b)および(c)に示すように、試験体10の保持部材20の基準面を変えて、基準面からの高さを高さh2=30mmや高さh3=2mmにして、搬送路42a上に載置させる。このように試験体10は搬送路42a上に載置させる基準面を変えるだけで、金属片5の高さを変えることができるようになっている。   These adjustment operations are also performed at the height of the other metal piece 5. For example, as shown in FIGS. 9B and 9C, the reference surface of the holding member 20 of the test body 10 is changed so that the height from the reference surface is a height h2 = 30 mm or a height h3 = 2 mm. Then, it is placed on the transport path 42a. Thus, the test body 10 can change the height of the metal piece 5 only by changing the reference surface to be placed on the transport path 42a.

また、図7や図8に示されたように、検査対象41が重なり合うことがある。そのため、金属片5の高さは、搬送路42a上からの検査対象41の高さにおいて想定される上限付近の高さと、検査対象41の厚み分の高さと、搬送路42a付近の高さ等とであることが好ましい。   Further, as shown in FIGS. 7 and 8, the inspection objects 41 may overlap. Therefore, the height of the metal piece 5 is the height near the upper limit assumed in the height of the inspection target 41 from above the transport path 42a, the height of the thickness of the inspection target 41, the height near the transport path 42a, etc. It is preferable that

以上、本実施の形態に係る金属検出機用の試験体10を用いることにより、金属検出機40における高さ方向の通過位置まで検査できるので、金属検出機40の検出性能を高精度に測定することができる。すなわち保持部材20により搬送路42aの面から所定の高さに金属片5を保持でき、サーチコイル44の中心付近の位置まで検査できるので、金属検出機40の検出性能を高精度に測定することができる。しかも、かさ上げ部材でかさ上げをする必要がないため、測定を繰り返す場合に高さ方向の通過位置のばらつきがなく正確に金属検出機40の検出性能を測定することができる。   As described above, since the metal detector 40 can be inspected up to the passing position in the height direction by using the metal detector test body 10 according to the present embodiment, the detection performance of the metal detector 40 is measured with high accuracy. be able to. That is, since the metal piece 5 can be held at a predetermined height from the surface of the conveyance path 42a by the holding member 20 and the position near the center of the search coil 44 can be inspected, the detection performance of the metal detector 40 can be measured with high accuracy. Can do. In addition, since it is not necessary to raise with a raising member, the detection performance of the metal detector 40 can be accurately measured without variations in the passing position in the height direction when the measurement is repeated.

また、基準面B1、B2、B3が正方形の形状と略同じ形状であるため、どのような向きに試験体10を搬送コンベア42に置いたとしても、加速に対して試験体10は倒れにくい。また搬送コンベア42に振動があっても、どの向きに対しても安定した状態で載置できる。そして搬送コンベア42に載置する際、向きを考慮せず試験体10を載置できる。   In addition, since the reference planes B1, B2, and B3 have substantially the same shape as the square shape, the test body 10 is unlikely to fall down due to acceleration regardless of the orientation of the test body 10 placed on the conveyor 42. Even if the conveyor 42 is vibrated, it can be placed in a stable state in any direction. And when mounting on the conveyance conveyor 42, the test body 10 can be mounted without considering direction.

また保持部材20の図形重心Gが、基準面(B1、B2、B3)の図形中心Cから略垂直方向にあり、基準面(B1、B2、B3)の図形中心Cと保持部材20の図形重心Gとの各距離gが、基準面(B1、B2、B3)の図形中心Cを通り基準面(B1、B2、B3)の辺と交わる線分の長さdの略半分であるため、試験体10の重心が低く、搬送コンベア42に載置する際、特に倒れにくい。   The figure center of gravity G of the holding member 20 is substantially perpendicular to the figure center C of the reference plane (B1, B2, B3), and the figure center C of the reference plane (B1, B2, B3) and the figure center of gravity of the holding member 20 are set. Each distance g from G is approximately half the length d of the line segment passing through the graphic center C of the reference plane (B1, B2, B3) and intersecting the side of the reference plane (B1, B2, B3). When the body 10 has a low center of gravity and is placed on the transfer conveyor 42, it is particularly difficult to fall.

保持部材20が、基準面B1、B2、B3のうちの1つ(例えば基準面B1)を含む仮想平面P1が他の少なくとも1つの基準面(例えば基準面B2)を含む仮想平面P2と交わる形状であることにより、基準面は仮想平面によって規定できるので、保持部材の実平面にとらわれず、実施する上で保持部材の肉抜きをして、試験体の質量を軽減させたり、材料のコストを下げたりすることができる。また、各基準面B1、B2、B3を含む各仮想平面が互いに直交するように金属片5の位置が設定されているので、ラベル30a、30b、30cを貼る面は、各々基準面B1、B2、B3に対向する面になり、ラベルの厚さが金属片5の保持される位置に影響を与えない。さらに試験体10を反転させなくても、搬送路42aに載置させる保持部材20の基準面B1、B2、B3を容易に変えることができる。   The holding member 20 has a shape in which a virtual plane P1 including one of the reference planes B1, B2, and B3 (for example, the reference plane B1) intersects a virtual plane P2 including at least one other reference plane (for example, the reference plane B2). Therefore, since the reference plane can be defined by a virtual plane, it is not constrained by the actual plane of the holding member.In practice, the holding member is thinned to reduce the mass of the specimen, and the material cost can be reduced. Can be lowered. Further, since the positions of the metal pieces 5 are set so that the virtual planes including the reference surfaces B1, B2, and B3 are orthogonal to each other, the surfaces to which the labels 30a, 30b, and 30c are attached are the reference surfaces B1 and B2, respectively. , B3, and the label thickness does not affect the position where the metal piece 5 is held. Further, the reference surfaces B1, B2, and B3 of the holding member 20 to be placed on the transport path 42a can be easily changed without inverting the test body 10.

また、搬送路42aに載置させる保持部材20の基準面B1、B2、B3を変えるだけで、容易に搬送路42aからの金属片5の高さを正確に変えることができる。さらに1つの試験体10で金属検出機40における複数の高さ方向の通過位置の検査ができるため、高さごとに試験体を変えて検査の作業を行う必要がないため、作業の手間を省くことができる。そして試験体10の個数が少なくて済むので、試験体10の管理が容易になる。   Moreover, the height of the metal piece 5 from the conveyance path 42a can be easily changed accurately only by changing the reference planes B1, B2, and B3 of the holding member 20 placed on the conveyance path 42a. Furthermore, since one test body 10 can inspect a plurality of passing positions in the metal height direction in the metal detector 40, it is not necessary to change the test body for each height, thereby eliminating the labor of the work. be able to. And since the number of the test bodies 10 is small, management of the test bodies 10 becomes easy.

また、図10に示すように、基準面B1、B2、B3に対向した面も基準面にできる。すなわち、保持部材20のサイズが一辺の長さが50mmであるので、一辺の長さ50mmと各高さh1、h2、h3との差が、各々高さ40mm、20mm、48mmとなり、1つの試験体10で6つの高さのテストが実施できる。   Further, as shown in FIG. 10, the surfaces facing the reference surfaces B1, B2, and B3 can also be used as reference surfaces. That is, since the length of the holding member 20 is 50 mm on one side, the difference between the length of 50 mm on one side and the heights h1, h2, and h3 is 40 mm, 20 mm, and 48 mm, respectively. The body 10 can carry out six height tests.

また、発泡スチロール等のかさ上げ部材を生産ラインに持ち込む必要がなくなり、かさ上げ部材の一部が欠けたり、かさ上げ部材にゴミ等が付着したりするなどという異物混入がなくなり、衛生管理上望ましくなる。さらに、試験体10は洗浄しやすく、管理する個数も少ないため、衛生上の管理も容易になる。したがって金属粒等のゴミが紛れ込む余地が少なくなり、検出性能の試験結果の信頼性が向上する。   In addition, it is not necessary to bring a raised member such as polystyrene foam into the production line, and there is no foreign matter contamination such as a part of the raised member being chipped or dust adhering to the raised member, which is desirable for hygiene management. . Furthermore, since the test body 10 is easy to clean and the number to be managed is small, hygiene management is also easy. Accordingly, there is less room for dust such as metal particles to be mixed in, and the reliability of the detection performance test results is improved.

また、保持部材20が透明または半透明の樹脂であるため、保持部材20の中に封入されている金属片5の位置や形状等を目視できる。さらに識別手段30であるラベル30a、30b、30cにより、保持部材20に封入されている金属片5の保持された高さや材質等の性状が明確になり、金属検出機40の検出性能の測定の際に試験体10を誤った基準面等で使用する場合を防止できる。また、載置した基準面B1、B2、B3に対してラベル30a、30b、30cを保持部材20の上面に貼ることで、金属片5の性状が確認しやすくなる。   Further, since the holding member 20 is a transparent or translucent resin, the position, shape, etc. of the metal piece 5 enclosed in the holding member 20 can be visually observed. Furthermore, the labels 30a, 30b, and 30c, which are identification means 30, clarify the properties such as the height and material of the metal piece 5 enclosed in the holding member 20, and measure the detection performance of the metal detector 40. In this case, it is possible to prevent the test body 10 from being used with an incorrect reference surface. Moreover, it becomes easy to confirm the property of the metal piece 5 by sticking the labels 30a, 30b, and 30c on the upper surface of the holding member 20 with respect to the placed reference surfaces B1, B2, and B3.

なお、保持部材20により保持される金属片5の位置は、搬送路42a上を搬送される食品等の検査対象41の大きさや種類等、または、金属検出機40の検出部43のトンネルの大きさ、サーチコイル44のタイプや大きさ等によって、変えてもよい。   The position of the metal piece 5 held by the holding member 20 is the size and type of the inspection object 41 such as food conveyed on the conveyance path 42a, or the size of the tunnel of the detection unit 43 of the metal detector 40. The search coil 44 may be changed depending on the type and size thereof.

また、識別手段30は、ラベル30a、30b、30cの他に、保持部材20に金属片5の性状を刻印しても、インク等で直接書き込んでもよく、外部から金属片5の性状が確認できればよい。   In addition to the labels 30a, 30b and 30c, the identification means 30 may be engraved with the properties of the metal piece 5 on the holding member 20 or may be directly written with ink or the like, and if the properties of the metal piece 5 can be confirmed from the outside. Good.

なお、金属検出機用の試験体10の使用法として、金属検出機40が検査対象41の搬送中における使用法を説明したが、検査対象41の搬送中でなくてもよい。通常、金属検出機40を始動させる午前、午後の始業時等の検査対象41を搬送する前にも、金属検出機40の検出性能の測定を行い、サーチコイルの感度等の調整が行われている。また検査対象を変えたときもサーチコイルの感度等の調整が必要なため、検出性能の測定が行われる。なお金属検出機40の運転し始めと運転途中では、金属検出機40の温まり具合や環境の温度等によりサーチコイルの感度等が異なることがあるので、高精度に検出性能を保つため、検査対象41の搬送中でも測定が行われる。   Although the metal detector 40 has been described as being used while the test object 41 is being transported as a method of using the test body 10 for the metal detector, the test object 41 may not be being transported. Usually, the detection performance of the metal detector 40 is measured and the sensitivity of the search coil is adjusted before the inspection object 41 is transported at the start of work in the morning and afternoon when the metal detector 40 is started. Yes. Even when the inspection object is changed, the sensitivity of the search coil needs to be adjusted, so that the detection performance is measured. In addition, since the sensitivity of the search coil may vary depending on the warming condition of the metal detector 40, the temperature of the environment, etc. during the start and during the operation of the metal detector 40, the inspection target is maintained in order to maintain the detection performance with high accuracy. Measurement is performed even during the conveyance of 41.

(第2の実施の形態)
図11は本発明の第2の実施の形態に係る金属検出機用の試験体を示す斜視図である。
(Second Embodiment)
FIG. 11 is a perspective view showing a specimen for a metal detector according to the second embodiment of the present invention.

なお、本実施の形態は金属片の形状と識別手段の表示内容とが異なるものの、他の構成については第1の実施の形態とほぼ同様であるので、同一又はそれに相当する構成については図3〜図10に示したものと同一符号で示し、相違点について詳述する。   Although the present embodiment is different in the shape of the metal piece and the display content of the identification means, the other configurations are almost the same as those in the first embodiment, so the same or equivalent configurations are shown in FIG. The same reference numerals as those shown in FIG. 10 are used, and the differences will be described in detail.

図11(a)に示すように、金属検出機用の試験体10の保持部材20に保持されている金属片6の形状は円柱状である。また図11(b)および図11(c)に示すように、識別手段31のラベル31a、31bは、金属片6の材質(Fe)、断面形状の直径と長軸方向の長さ(φ0.3×1mm)、および、ラベル31aが貼られた方向から見た場合における金属片6の形状を図示している構成になっている。ラベル31aは、ラベル31a上に図示された金属片6の形状の長軸方向と、保持部材20に埋設された金属片6の長軸方向とが略一致するような位置に貼られる。そして、ラベル31bは、ラベル31b上に図示された金属片6の断面形状と、保持部材20に埋設された金属片6の断面とが略重なる位置に貼られる。   As shown to Fig.11 (a), the shape of the metal piece 6 currently hold | maintained at the holding member 20 of the test body 10 for metal detectors is a column shape. Further, as shown in FIGS. 11B and 11C, the labels 31a and 31b of the identification means 31 are made of the material (Fe) of the metal piece 6, the diameter of the cross-sectional shape and the length in the long axis direction (φ0. 3 × 1 mm) and the shape of the metal piece 6 when viewed from the direction in which the label 31a is attached. The label 31a is attached at a position where the major axis direction of the shape of the metal piece 6 illustrated on the label 31a substantially coincides with the major axis direction of the metal piece 6 embedded in the holding member 20. And the label 31b is affixed on the position where the cross-sectional shape of the metal piece 6 illustrated on the label 31b and the cross-section of the metal piece 6 embedded in the holding member 20 substantially overlap.

次に、金属片6の埋め込み方を説明する。   Next, how to embed the metal piece 6 will be described.

まず、樹脂製の保持部材20に対して、金属片6の直径をほぼ同じ径のドリルで、穴を所定の深さまで開ける。接着剤等を穴の底に少し入れ、金属片6をその穴に入れ、金属片6の位置を固定する。さらに接着剤を詰め込み、金属片6を保持部材20の中に埋設させる。このように容易に金属片6を所定の位置に保持できるようになっている。   First, a hole is opened to a predetermined depth in the resin holding member 20 with a drill having substantially the same diameter as the metal piece 6. A small amount of adhesive or the like is put in the bottom of the hole, the metal piece 6 is put in the hole, and the position of the metal piece 6 is fixed. Further, the adhesive is filled and the metal piece 6 is embedded in the holding member 20. Thus, the metal piece 6 can be easily held at a predetermined position.

次に、本実施の形態に係る試験体の使用法について説明する。なお、本実施の形態は、金属片6が埋設された試験体10の向きにより、金属検出機の感度と識別手段の表示内容とが異なるものの、基本的な使用法は第1の実施の形態とほぼ同様であるので、相違点について詳述する。   Next, a method for using the specimen according to the present embodiment will be described. In this embodiment, although the sensitivity of the metal detector and the display content of the identification means differ depending on the orientation of the test body 10 in which the metal piece 6 is embedded, the basic usage is the first embodiment. Therefore, the difference will be described in detail.

まず、図7に示したような金属検出機40の検出部43の大きさや検査対象41の大きさ等に合わせて、所望の金属片6の高さを有する試験体10を選択する。   First, the test body 10 having a desired height of the metal piece 6 is selected in accordance with the size of the detection unit 43 of the metal detector 40 as shown in FIG.

搬送コンベア42の搬送路42a上に試験体10を載置する際、所望の金属片6の高さの基準面が下になるように試験体10を載置する。このとき、金属片6の長軸方向が図示されたラベル31a、31bを見て確認しながら、サーチコイル44の向きを考慮して試験体10を載置する。例えば、金属片6の長軸方向が搬送方向に対して直角または水平になるように試験体10を載置する。   When placing the test body 10 on the transport path 42 a of the transport conveyor 42, the test body 10 is placed so that the reference plane at the height of the desired metal piece 6 is down. At this time, the specimen 10 is placed in consideration of the direction of the search coil 44 while checking the major axis direction of the metal piece 6 by looking at the illustrated labels 31a and 31b. For example, the test body 10 is placed so that the major axis direction of the metal piece 6 is perpendicular or horizontal to the transport direction.

そして、サーチコイル44の中を通過させ、金属片6の形状の向きに合わせたサーチコイル44の感度調整等ができるようになっている。   The sensitivity of the search coil 44 can be adjusted according to the direction of the shape of the metal piece 6 by passing through the search coil 44.

以上、本実施の形態に係る金属検出機用の試験体10を用いることにより、ラベル31a、31bに図示された金属片6の形状の向きに合わせて、試験体10の載置の向きを変えるだけで、搬送コンベア42の搬送路42aからの高さ方向を加味して、金属片6の方向による金属検出機40の検出性能を容易にかつ高精度に測定できる。   As described above, by using the test body 10 for the metal detector according to the present embodiment, the mounting direction of the test body 10 is changed in accordance with the direction of the shape of the metal piece 6 illustrated in the labels 31a and 31b. In this way, the detection performance of the metal detector 40 in the direction of the metal piece 6 can be easily and accurately measured in consideration of the height direction of the transfer conveyor 42 from the transfer path 42a.

このような柱状の金属片6を用いることで、針状の異物に対する金属検出機40の検出性能を容易にかつ高精度に測定できる。   By using such a columnar metal piece 6, the detection performance of the metal detector 40 for a needle-like foreign material can be measured easily and with high accuracy.

また、金属片6が柱状で、金属片6の方向による金属検出機40の検出性能を測定する必要上、試験体10の載置の向きを変える必要がある。基準面B1、B2の形状において、辺の長さが極端に長い長方形の場合は、試験体10を載置させる向きにより、転倒に対する安定度が異なってくるため、試験体10を載置させる際に、置き方に注意する必要がある。しかし、本実施の形態は、基準面B1、B2が正方形の形状と略同じ形状であるため、試験体10を載置させる際に、転倒しないようにさほど置き方に注意する必要がない。   In addition, the metal piece 6 has a columnar shape, and it is necessary to measure the detection performance of the metal detector 40 according to the direction of the metal piece 6. In the shape of the reference planes B1 and B2, in the case of a rectangle having an extremely long side, the stability against falling differs depending on the direction in which the specimen 10 is placed. In addition, it is necessary to pay attention to the placement. However, in the present embodiment, since the reference planes B1 and B2 have substantially the same shape as the square shape, when placing the test body 10, it is not necessary to pay attention to how to place it so as not to fall.

また、金属片6の長軸方向がラベル31a、31bに図示されているので、容易に正確に試験体10を載置できる。また、搬送路42aに載置させる保持部材20の基準面B1、B2を変えるだけで、容易に搬送路42aからの金属片6の高さを正確に変えることができる。   Further, since the major axis direction of the metal piece 6 is illustrated in the labels 31a and 31b, the test body 10 can be easily and accurately placed. Moreover, the height of the metal piece 6 from the conveyance path 42a can be easily changed accurately only by changing the reference planes B1 and B2 of the holding member 20 placed on the conveyance path 42a.

(第3の実施の形態)
図12および図13は本発明の第3の実施の形態に係る金属検出機用の試験体を示す斜視図である。なお、本実施の形態は識別手段の表示方法が異なるものの、他の構成については第1や第2の実施の形態とほぼ同様であるので、同一又はそれに相当する構成については図3〜図11に示したものと同一符号で示し、相違点について詳述する。
(Third embodiment)
12 and 13 are perspective views showing a specimen for a metal detector according to a third embodiment of the present invention. Although the present embodiment is different in the display method of the identification means, the other configurations are almost the same as those in the first and second embodiments, so the same or corresponding configurations are shown in FIGS. The same reference numerals as those shown in FIG.

図12に示すように、試験体10の識別手段32が金属片5の形状を示す形状、すなわち円形状になっている。そして保持部材20の樹脂の色と異なる非透明に着色されている。識別手段32は、シート状で、保持部材20の表面に貼るようになっている。   As shown in FIG. 12, the identification means 32 of the test body 10 has a shape indicating the shape of the metal piece 5, that is, a circular shape. The holding member 20 is colored non-transparently different from the resin color. The identification means 32 is in the form of a sheet and is attached to the surface of the holding member 20.

識別手段32の円の大きさにより、保持されている金属片5の直径を表し、識別手段32の色により、金属片5の材質を区別している。   The diameter of the metal piece 5 held is represented by the size of the circle of the identification means 32, and the material of the metal piece 5 is distinguished by the color of the identification means 32.

また図13に示すように、試験体10の識別手段33が金属片6の形状を示す形状、すなわち円柱状を表した形状になっている。識別手段33の形状の長軸方向が、金属片6の長軸方向を示すようになっている。   Moreover, as shown in FIG. 13, the identification means 33 of the test body 10 has a shape representing the shape of the metal piece 6, that is, a shape representing a cylindrical shape. The major axis direction of the shape of the identification means 33 indicates the major axis direction of the metal piece 6.

識別手段33の形状の長さにより、保持されている金属片6の長軸方向の長さを表し、識別手段33の色により、金属片6の材質を区別している。   The length of the metal piece 6 held in the major axis direction is represented by the length of the shape of the identification means 33, and the material of the metal piece 6 is distinguished by the color of the identification means 33.

このように本実施の形態により、視覚的・直感的に金属片の性状の内容を把握することができ、誤った試験体10で金属検出機40の検出性能を測定することが防止できる。   As described above, according to the present embodiment, it is possible to visually and intuitively grasp the contents of the properties of the metal piece, and it is possible to prevent the detection performance of the metal detector 40 from being measured with the wrong test body 10.

(第4の実施の形態)
図14は本発明の第4の実施の形態に係る金属検出機用の試験体を示す斜視図である。
(Fourth embodiment)
FIG. 14 is a perspective view showing a test body for a metal detector according to a fourth embodiment of the present invention.

なお、本実施の形態は保持部材の形状が異なるものの、他の構成については第1の実施の形態とほぼ同様であるので、同一又はそれに相当する構成については図3〜図10に示したものと同一符号で示し、相違点について詳述する。   Although the present embodiment is different in the shape of the holding member, the other configurations are substantially the same as those in the first embodiment, and therefore the same or equivalent configurations are those shown in FIGS. The same reference numerals are used, and the differences will be described in detail.

図14に示すように、金属検出機用の試験体11における保持部材21の形状が、略正四面体である。試験体11の識別手段34のラベル34a、34b、34cには、図15に示すように、ラベル34a、34b、34cが貼られた基準面B4、B5、B6から金属片5までの各距離が表示されている。   As shown in FIG. 14, the shape of the holding member 21 in the test body 11 for a metal detector is a substantially regular tetrahedron. As shown in FIG. 15, the labels 34a, 34b, 34c of the identification means 34 of the test body 11 have distances from the reference planes B4, B5, B6 to which the labels 34a, 34b, 34c are attached to the metal piece 5, respectively. It is displayed.

図16に示すように、保持部材21は、正多角形である正三角形の形状と略同じ形状の少なくとも2つの基準面(B4、B5、B6)を有し、基準面(B4、B5、B6)から各々相互に異なる高さh1、h2、h3に金属片5を保持するようになっている。   As shown in FIG. 16, the holding member 21 has at least two reference surfaces (B4, B5, B6) having substantially the same shape as a regular triangle that is a regular polygon, and the reference surfaces (B4, B5, B6). The metal pieces 5 are held at different heights h1, h2, and h3.

また、保持部材20の図形重心Gが、例えば基準面B4の図形中心Cから略垂直方向にあり、基準面B4の図形中心Cと保持部材21の図形重心Gとの距離gが、基準面B4の図形中心Cを通り基準面B4の辺a5および辺a6と交わる線分の長さdの略半分になるようになっている。ここで、線分の長さdは、基準面B4の図形中心Cを通り辺a5、a6、a7のいずれかと交わる線分の長さである。   Further, the figure center of gravity G of the holding member 20 is substantially perpendicular to the figure center C of the reference plane B4, for example, and the distance g between the figure center C of the reference plane B4 and the figure center of gravity G of the holding member 21 is the reference plane B4. Is approximately half the length d of the line segment passing through the figure center C and intersecting the sides a5 and a6 of the reference plane B4. Here, the length d of the line segment is the length of the line segment passing through the figure center C of the reference plane B4 and intersecting any of the sides a5, a6, and a7.

また保持部材21は、基準面B4、B5、B6のうち1つが他の少なくとも1つの基準面と交わるように、例えば基準面B4またはB5を含む仮想平面が形成されるようになっている。   In addition, the holding member 21 is formed with a virtual plane including, for example, the reference surface B4 or B5 so that one of the reference surfaces B4, B5, and B6 intersects with at least one other reference surface.

以上のような保持部材21の形状でも、第1の実施の形態と同じような効果を実現できる。   Even with the shape of the holding member 21 as described above, the same effect as that of the first embodiment can be realized.

なお、図17から図20に示すように、保持部材の立体形状として、さまざまな立体形状を用いることができる。   As shown in FIGS. 17 to 20, various three-dimensional shapes can be used as the three-dimensional shape of the holding member.

図17に示すように、金属検出機用の試験体12の保持部材22の形状は、立方体に近い直方体でも良い。すなわち、保持部材22は、正多角形である正方形の形状と略同じ少なくとも2つの基準面(B7、B8、B9)を有し、基準面(B7、B8、B9)から各々相互に異なる高さh1、h2、h3に金属片5を保持するようになっている。   As shown in FIG. 17, the shape of the holding member 22 of the test body 12 for a metal detector may be a rectangular parallelepiped close to a cube. That is, the holding member 22 has at least two reference planes (B7, B8, B9) that are substantially the same as the square shape that is a regular polygon, and has different heights from the reference planes (B7, B8, B9). The metal piece 5 is held at h1, h2, and h3.

また保持部材22の図形重心Gが、例えば基準面B7の図形中心Cから略垂直方向にあり、基準面B7の図形中心Cと保持部材22の図形重心Gとの距離gが、基準面B7の図形中心Cを通り例えば基準面B7の辺a8および辺a9と交わる線分の長さdの略半分になるようになっている。   Further, the figure center of gravity G of the holding member 22 is, for example, substantially perpendicular to the figure center C of the reference surface B7, and the distance g between the figure center C of the reference surface B7 and the figure center of gravity G of the holding member 22 is For example, the length d is approximately half the length d of the line segment that intersects the sides a8 and a9 of the reference plane B7 through the figure center C.

また保持部材22は、基準面B7、B8、B9のうちの1つ(例えば基準面B7)を含む仮想平面が他の少なくとも1つの基準面(例えば基準面B8)を含む仮想平面と交わる形状であるように形成されている。   The holding member 22 has a shape in which a virtual plane including one of the reference planes B7, B8, and B9 (for example, the reference plane B7) intersects with a virtual plane including at least one other reference plane (for example, the reference plane B8). It is formed to be.

図18に示すように、金属検出機用の試験体13の保持部材23の形状は、三角柱でも良い。すなわち、保持部材23は、正多角形である正方形や正三角形の形状と略同じ少なくとも2つの基準面(B10、B11、B12)を有し、基準面(B10、B11、B12)から各々相互に異なる高さh1、h2、h3に金属片5を保持するようになっている。   As shown in FIG. 18, the shape of the holding member 23 of the test body 13 for a metal detector may be a triangular prism. That is, the holding member 23 has at least two reference planes (B10, B11, B12) that are substantially the same as the regular polygonal square or equilateral triangle shape, and the reference planes (B10, B11, B12) are mutually connected. The metal piece 5 is held at different heights h1, h2, and h3.

また保持部材23の図形重心Gが、例えば基準面B10の図形中心Cから略垂直方向にあり、基準面B10の図形中心Cと保持部材23の図形重心Gとの距離gが、例えば基準面B10の図形中心Cを通り基準面B10の辺a10および辺a11と交わる線分の長さdの略半分になるようになっている。   Further, the figure center of gravity G of the holding member 23 is, for example, substantially perpendicular to the figure center C of the reference plane B10, and the distance g between the figure center C of the reference plane B10 and the figure center of gravity G of the holding member 23 is, for example, the reference plane B10. Is approximately half the length d of the line segment passing through the figure center C and intersecting the sides a10 and a11 of the reference plane B10.

また保持部材23は、基準面B10、B11、B12のうちの1つ(例えば基準面B10)を含む仮想平面が他の少なくとも1つの基準面(例えば基準面B11)を含む仮想平面と交わる形状であるように形成されている。   The holding member 23 has a shape in which a virtual plane including one of the reference planes B10, B11, and B12 (for example, the reference plane B10) intersects with a virtual plane including at least one other reference plane (for example, the reference plane B11). It is formed to be.

図19に示すように、金属検出機用の試験体14の保持部材24の形状は、円柱でも良い。すなわち、保持部材24は、無限の正多角形である円の形状と略同じ2つの基準面B13、B14を有し、基準面B13、B14から各々相互に異なる高さh1、h2に金属片5を保持するようになっている。   As shown in FIG. 19, the shape of the holding member 24 of the test body 14 for a metal detector may be a cylinder. In other words, the holding member 24 has two reference surfaces B13 and B14 that are substantially the same as the shape of a circle that is an infinite regular polygon, and the metal pieces 5 have different heights h1 and h2 from the reference surfaces B13 and B14, respectively. Is supposed to hold.

また保持部材24の図形重心Gが、例えば基準面B13の図形中心Cから略垂直方向にあり、基準面B13の図形中心Cと保持部材24の図形重心Gとの距離gが、基準面B13の図形中心Cを通り基準面B13の円周と交わる線分の長さdの略半分になるようになっている。   In addition, the figure gravity center G of the holding member 24 is, for example, substantially perpendicular to the figure center C of the reference surface B13, and the distance g between the figure center C of the reference surface B13 and the figure center of gravity G of the holding member 24 is The length is approximately half the length d of the line segment passing through the figure center C and intersecting the circumference of the reference plane B13.

図20に示すように、金属検出機用の試験体15の保持部材25の形状は、基準面が台形の四角柱でも良い。すなわち、保持部材25は、正多角形である正方形の形状と略同じ形状の少なくとも2つの基準面(B15、B16、B17)を有し、基準面(B15、B16、B17)から各々相互に異なる高さh1、h2、h3に金属片5を保持するようになっている。   As shown in FIG. 20, the shape of the holding member 25 of the test body 15 for a metal detector may be a quadrangular prism whose trapezoidal reference surface. That is, the holding member 25 has at least two reference surfaces (B15, B16, B17) having substantially the same shape as the square shape that is a regular polygon, and is different from the reference surfaces (B15, B16, B17). The metal piece 5 is held at heights h1, h2, and h3.

また保持部材25の図形重心Gが、例えば基準面B15の図形中心Cから略垂直方向にあり、基準面B15の図形中心Cと保持部材25の図形重心Gとの距離gが、基準面B15の図形中心Cを通り例えば基準面B15の辺a12および辺a13と交わる線分の長さdの略半分になるようになっている。   Further, the figure center of gravity G of the holding member 25 is, for example, substantially perpendicular to the figure center C of the reference surface B15, and the distance g between the figure center C of the reference surface B15 and the figure center of gravity G of the holding member 25 is For example, the length d is approximately half the length d of the line segment that intersects the sides a12 and a13 of the reference plane B15 through the figure center C.

また保持部材25は、基準面B15、B16、B17のうちの1つ(例えば基準面B15)を含む仮想平面が他の少なくとも1つの基準面(例えば基準面B16)を含む仮想平面と交わる形状であるように形成されている。   The holding member 25 has a shape in which a virtual plane including one of the reference planes B15, B16, and B17 (for example, the reference plane B15) intersects with a virtual plane including at least one other reference plane (for example, the reference plane B16). It is formed to be.

保持部材が以上のような形状であっても、上述の実施の形態と同じような効果を実現できる。   Even if the holding member has the shape as described above, the same effect as that of the above-described embodiment can be realized.

なお、図7に示した検出部43は、検出部43の入り口付近に配置され、検査対象41に直流磁界を印加するための1対の直流磁界印加用磁石と、1対の直流磁界印加用磁石の近傍に配置され、1対の直流磁界印加用磁石の両磁極間を検査対象41が通過する際に起こる磁界分布の変化を検出する1対の磁界分布変化検出コイルとをさらに備えてもよい。また検出部43は、渦電流方式でもよい。   The detection unit 43 shown in FIG. 7 is arranged near the entrance of the detection unit 43, and a pair of DC magnetic field application magnets for applying a DC magnetic field to the inspection object 41 and a pair of DC magnetic field application And a pair of magnetic field distribution change detection coils that are disposed in the vicinity of the magnet and detect a change in the magnetic field distribution that occurs when the inspection object 41 passes between both magnetic poles of the pair of DC magnetic field application magnets. Good. The detection unit 43 may be an eddy current method.

また図8に示したサーチコイル44は、いわゆる垂直型であるが、水平型のサーチコイルを搬送路42aの上下に配置してもよい。この場合、搬送路42aの上下に設置された水平型のサーチコイル間の中間付近における金属検出機の検出性能を測定できるような金属片の高さを有する試験体が好ましい。   The search coil 44 shown in FIG. 8 is a so-called vertical type, but a horizontal type search coil may be arranged above and below the conveyance path 42a. In this case, a specimen having a metal piece height that can measure the detection performance of the metal detector near the middle between horizontal search coils installed above and below the conveyance path 42a is preferable.

また、検査対象の搬送方法は、図7に示した搬送コンベアの他に、傾斜面を下らせる方法でもよい。また、検査対象は、食品に限られず、薬等錠剤でもよい。   In addition to the transport conveyor shown in FIG. 7, the inspection target transport method may be a method of lowering the inclined surface. Further, the inspection object is not limited to food, and may be tablets such as medicines.

また、試験体における保持部材の基準面は、平面でなくてもよい。例えば基準面を凹ませたような形状でもよい。このとき保持部材の各頂点により基準面の仮想平面が規定されている。この場合、保持部材の肉抜きができ、試験体の質量を軽減させ、材料のコストを下げることができる。   Further, the reference surface of the holding member in the test body may not be a flat surface. For example, a shape in which the reference surface is recessed may be used. At this time, a virtual plane of the reference plane is defined by each vertex of the holding member. In this case, the holding member can be thinned, the mass of the specimen can be reduced, and the cost of the material can be reduced.

また、各実施の形態について記載した保持部材への金属片の埋め込み方については、保持部材や金属片の大きさや形状に応じて適宜変更することが可能であり、標準的な試験体を量産するにあたっては保持部材を金型成形することが好適で、均質かつ安価な試験体を提供できることは言うまでもない。ただし、金属片の埋め込み方や保持部材の成形方法はこれに限られるものではない。   In addition, the method of embedding the metal piece in the holding member described in each embodiment can be appropriately changed according to the size and shape of the holding member and the metal piece, and mass production of a standard specimen is performed. Needless to say, it is preferable to mold the holding member and provide a homogeneous and inexpensive specimen. However, the method of embedding the metal piece and the method of forming the holding member are not limited to this.

符号の説明Explanation of symbols

5、6 金属片
10、11、12、13、14、15 金属検出機用の試験体
20、21、22、23、24、25 保持部材
30、31、32、33、34 識別手段
30a、30b、30c、31a、31b、34a、34b、34c ラベル
40 金属検出機
P1、P2 仮想平面
B1〜B15 基準面
a1〜a13 辺
C 図形中心
G 図形重心
d 線分の長さ
g 距離
h1、h2、h3 高さ
5, 6 Metal piece 10, 11, 12, 13, 14, 15 Specimen for metal detector 20, 21, 22, 23, 24, 25 Holding member 30, 31, 32, 33, 34 Identification means 30a, 30b , 30c, 31a, 31b, 34a, 34b, 34c Label 40 Metal detector P1, P2 Virtual plane B1-B15 Reference plane a1-a13 Side C Graphic center G Graphic centroid d Length of line segment g Distance h1, h2, h3 height

従来の金属検出機の概要を示す斜視図である。It is a perspective view which shows the outline | summary of the conventional metal detector. 従来の金属検出機用のテストピースを示す(a)上面図および(b)断面図である。It is the (a) top view and (b) sectional view which show the test piece for the conventional metal detector. 本発明の第1の実施の形態に係る金属検出機用の試験体を示す斜視図である。It is a perspective view which shows the test body for metal detectors which concerns on the 1st Embodiment of this invention. 前記試験体における金属片の位置を示す斜視図である。It is a perspective view which shows the position of the metal piece in the said test body. 前記試験体の図形重心を示す斜視図である。It is a perspective view which shows the figure gravity center of the said test body. 前記試験体に貼る識別手段の一例を示す図である。It is a figure which shows an example of the identification means stuck on the said test body. 前記試験体を用いる金属検出機の概要を示す斜視図である。It is a perspective view which shows the outline | summary of the metal detector using the said test body. 前記金属検出機の横側面図である。It is a side view of the metal detector. 前記試験体の載置状態を示す横側面図である。It is a side view which shows the mounting state of the said test body. 前記試験体の変形例である試験体の載置状態を示す横側面図である。It is a side view which shows the mounting state of the test body which is a modification of the said test body. 本発明の第2の実施の形態に係る金属検出機用の試験体を示す斜視図である。It is a perspective view which shows the test body for metal detectors concerning the 2nd Embodiment of this invention. 本発明の第3の実施の形態に係る金属検出機用の試験体を示す斜視図である。It is a perspective view which shows the test body for metal detectors concerning the 3rd Embodiment of this invention. 前記試験体の変形例を示す斜視図である。It is a perspective view which shows the modification of the said test body. 本発明の第4の実施の形態に係る金属検出機用の試験体を示す斜視図である。It is a perspective view which shows the test body for metal detectors concerning the 4th Embodiment of this invention. 前記試験体に貼る識別手段の一例を示す図である。It is a figure which shows an example of the identification means stuck on the said test body. 前記試験体における金属片の位置を示す斜視図である。It is a perspective view which shows the position of the metal piece in the said test body. 前記金属検出機用の試験体における他の一例を示す斜視図である。It is a perspective view which shows another example in the test body for the said metal detector. 前記金属検出機用の試験体における他の一例を示す斜視図である。It is a perspective view which shows another example in the test body for the said metal detector. 前記金属検出機用の試験体における他の一例を示す斜視図である。It is a perspective view which shows another example in the test body for the said metal detector. 前記金属検出機用の試験体における他の一例を示す斜視図である。It is a perspective view which shows another example in the test body for the said metal detector.

Claims (6)

金属検出機の性能検査に用いる金属片と、該金属片を保持する保持部材と、を備える金属検出機用の試験体であって、
前記保持部材を形成する複数の面の形状が多角形の形状をなし、前記複数の面のうち少なくとも2つの面が検査時に前記金属検出機に載置されるための基準面とされ、
前記金属片が、前記基準面から相互に異なる高さに保持されており、
前記金属片の前記基準面からの高さを示す識別手段を備えたことを特徴とする金属検出機用の試験体。
A test piece for a metal detector comprising a metal piece used for performance inspection of a metal detector, and a holding member for holding the metal piece,
The shape of the plurality of surfaces forming the holding member is a polygonal shape, and at least two of the plurality of surfaces serve as reference surfaces for placement on the metal detector during inspection,
The metal pieces are held at different heights from the reference plane ;
A test body for a metal detector , comprising identification means for indicating a height of the metal piece from the reference surface .
前記保持部材を形成する複数の面の形状が略正多角形である請求項1に記載の金属検出機用の試験体。   The test body for a metal detector according to claim 1, wherein the shape of the plurality of surfaces forming the holding member is a substantially regular polygon. 前記保持部材が、前記基準面のうちの1つを含む仮想平面が他の少なくとも1つの基準面を含む仮想平面と交わる形状である請求項1または請求項2に記載の金属検出機用の試験体。   The test for a metal detector according to claim 1, wherein the holding member has a shape in which a virtual plane including one of the reference planes intersects with a virtual plane including at least one other reference plane. body. 前記金属片の形状が柱状であり、
前記識別手段が前記金属片の長軸方向をも示す請求項1から請求項のいずれか一項に記載の金属検出機用の試験体。
The shape of the metal piece is columnar,
The specimen for a metal detector according to any one of claims 1 to 3 , wherein the identification means also indicates a major axis direction of the metal piece.
前記保持部材が透明または半透明の樹脂である請求項1から請求項のいずれか一項に記載の金属検出機用の試験体。 The specimen for a metal detector according to any one of claims 1 to 4 , wherein the holding member is a transparent or translucent resin. 前記識別手段が前記金属片の形状を示す形状を有する請求項1から請求項のいずれか一項に記載の金属検出機用の試験体。 The test body for a metal detector according to any one of claims 1 to 5 , wherein the identification unit has a shape indicating the shape of the metal piece.
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