JP2019136634A - Rod-like magnet and magnetic foreign matter removal apparatus - Google Patents

Rod-like magnet and magnetic foreign matter removal apparatus Download PDF

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JP2019136634A
JP2019136634A JP2018020490A JP2018020490A JP2019136634A JP 2019136634 A JP2019136634 A JP 2019136634A JP 2018020490 A JP2018020490 A JP 2018020490A JP 2018020490 A JP2018020490 A JP 2018020490A JP 2019136634 A JP2019136634 A JP 2019136634A
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rod
shaped magnet
magnet
magnetic foreign
foreign matter
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JP6446631B1 (en
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雅人 佐藤
Masahito Sato
雅人 佐藤
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JMC KK
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JMC KK
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Priority to JP2018020490A priority Critical patent/JP6446631B1/en
Priority to PCT/JP2018/044314 priority patent/WO2019155742A1/en
Priority to KR1020207022480A priority patent/KR102401105B1/en
Priority to CN201880088699.8A priority patent/CN111699045B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/26Magnetic separation acting directly on the substance being separated with free falling material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/28Magnetic plugs and dipsticks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/02Permanent magnets [PM]

Abstract

To provide a rod-like magnet and a magnetic foreign matter removal apparatus capable of reducing adsorption leaks of magnetic foreign matters while suppressing the residence of magnetic foreign matters.SOLUTION: This magnetic foreign matter removal apparatus 50 has a casing 51 having an introduction port 53 and an exhaust port 55 and a plurality of rod-like magnets 10 arranged in the casing 51 to extend in a rod-like form by a predetermined length, where the rod-like magnet 10 has an adsorption part 30 provided with a pair of adsorption faces 29, 29 extending by a predetermine length to be in parallel with each other as viewed in a cross section and a guide part 28 provided on one end side of the adsorption part 30 to guide the magnetic foreign matter M to the adsorption part 30,and where the plurality of rod-like magnets 10 are arranged in the casing 51 in parallel in a state of parallelism with predetermined gaps and with one end 23 side turned in a direction of travel of particulate matters or the like.SELECTED DRAWING: Figure 4

Description

本発明は、磁性異物を含む粉粒体や流体から、磁性異物を吸着除去するための、棒状磁石及び磁性異物除去装置に関する。   The present invention relates to a rod-shaped magnet and a magnetic foreign matter removing apparatus for attracting and removing magnetic foreign matters from a granular material or fluid containing magnetic foreign matters.

例えば、小麦粉等の食品原料となる粉粒体には、異物の混入は厳密に排除されなければならない。このような粉粒体から磁性異物を除去する装置として、例えば、粉粒体が投入されるケーシングと、その内部に配置される、断面円形状をなしたマグネットとを有するものが知られている。そして、ケーシングの上方開口から粉粒体を投入すると、マグネットに磁性異物Mが吸着されるので、粉粒体から磁性異物を除去することができる。   For example, foreign substances must be strictly excluded from powders and other food materials such as wheat flour. As an apparatus for removing magnetic foreign substances from such a granular material, for example, a device having a casing into which the granular material is charged and a magnet having a circular cross section disposed inside the casing is known. . And if a granular material is thrown in from the upper opening of a casing, since the magnetic foreign material M will be adsorb | sucked to a magnet, a magnetic foreign material can be removed from a granular material.

しかし、上記装置の場合、マグネットが断面円形状をなしているので、ケーシング上方から投入される粉粒体が、マグネットの上面側に溜まり、磁気による吸着効率が徐々に低下するという問題があった。   However, in the case of the above apparatus, since the magnet has a circular cross section, there has been a problem that the granular material thrown in from the upper part of the casing accumulates on the upper surface side of the magnet and the adsorption efficiency by magnetism gradually decreases. .

上記のような問題を解決するため、下記特許文献1には、断面形状が涙型をなしたペアシェイブ型バーマグネットが記載されている。図8Bに示すように、このバーマグネット100は、その上方部分の断面形状が、上端先細で下端側に向けて次第に広がるテーパ面を有する山形状をなし、下方部分の断面形状が半球状をなしている。また、バーマグネット100は、上方が開口したケーシング110内に配置される。そして、ケーシング110の上方開口から投入された粉粒体Gは、山形状をなした上方部分のテーパ面によって、下方に滑り落ちやすくなるので、上方部分に粉粒体Gが溜まりにくい。   In order to solve the above problems, Patent Document 1 listed below describes a pair-shaped bar magnet having a teardrop-shaped cross section. As shown in FIG. 8B, the bar magnet 100 has a mountain shape in which the cross-sectional shape of the upper portion is tapered at the upper end and gradually expands toward the lower end, and the cross-sectional shape of the lower portion is hemispherical. ing. The bar magnet 100 is disposed in a casing 110 that is open at the top. And since the granular material G thrown in from the upper opening of the casing 110 becomes easy to slide down by the taper surface of the upper part which made the mountain shape, the granular material G does not accumulate easily in an upper part.

実用新案登録第3164152号公報Utility Model Registration No. 3164152

ところで、上述した断面円形状のマグネットや、特許文献1に記載のバーマグネット100は、磁性異物の吸着力を高めるために、複数個のマグネットを、同極の側面どうしが対向するように並列して配置されることがある。このようにすると、隣接するマグネットの対向する両側面どうしの間に、磁力が集中して強い磁場が生じ、この磁場によってマグネット側面に磁性異物を吸着させやすくすることができる。この場合、隣接するマグネットの側面どうしが最も近接する箇所において、磁場が強くなり吸着力が高くなる。例えば、図8Bに示すように、断面が涙型のバーマグネット100では、山形状の上方部分と半球状の下方部分との境界部Pの部分のみにおいて、強磁場が発生して磁性異物を吸着するようになっている。   By the way, in the above-described circular magnet having a circular cross section and the bar magnet 100 described in Patent Document 1, a plurality of magnets are arranged in parallel so that the side surfaces of the same pole face each other in order to increase the attractive force of the magnetic foreign matter. May be placed. In this way, a strong magnetic field is generated by concentrating the magnetic force between the opposing side surfaces of the adjacent magnets, and this magnetic field can make it easier for magnetic foreign substances to be attracted to the side surface of the magnet. In this case, the magnetic field becomes stronger and the attractive force becomes higher at the location where the side surfaces of adjacent magnets are closest to each other. For example, as shown in FIG. 8B, in the teardrop-shaped bar magnet 100, a strong magnetic field is generated only at the boundary portion P between the upper part of the mountain shape and the lower part of the hemisphere to attract the magnetic foreign matter. It is supposed to be.

しかしながら、図8Bに示す断面涙型のバーマグネット100においては、隣接するマグネット間で強磁場が発生する境界部Pは線状となっており(バーマグネットの軸方向に沿って伸びる線状を意味する)、強磁場が発生する領域を広く確保することができないため、磁性異物の吸着量に限界があり、磁性異物の吸着漏れを十分に減らすことができない傾向にあった。   However, in the teardrop-shaped bar magnet 100 shown in FIG. 8B, the boundary P where a strong magnetic field is generated between adjacent magnets is linear (meaning a linear shape extending along the axial direction of the bar magnet). However, since a region where a strong magnetic field is generated cannot be secured widely, there is a limit to the amount of magnetic foreign matter adsorbed, and there is a tendency that the magnetic foreign matter adsorption leakage cannot be reduced sufficiently.

したがって、本発明の目的は、磁性異物の滞留を抑制しつつ、磁性異物の吸着漏れを少なくすることができる、棒状磁石及び磁性異物除去装置を提供することにある。   Accordingly, an object of the present invention is to provide a bar-shaped magnet and a magnetic foreign matter removing device that can reduce the leakage of magnetic foreign matters while suppressing the retention of magnetic foreign matters.

上記目的を達成するため、本発明の一つは、磁性異物を含む粉粒体又は流体から、前記磁性異物を磁場によって吸着するための、所定長さで棒状に伸びる棒状磁石であって、前記棒状磁石は、その軸方向に直交する断面で見たときに、互いに平行となるように所定長さで伸びる一対の吸着面を設けた吸着部と、該吸着部の一端側に設けられ、前記磁性異物を前記吸着部へ案内するガイド部とを有することを特徴とする。   In order to achieve the above object, one of the present invention is a rod-like magnet extending in a rod shape with a predetermined length for adsorbing the magnetic foreign matter from a granular material or fluid containing the magnetic foreign matter by a magnetic field, The bar-shaped magnet is provided on a suction portion provided with a pair of suction surfaces extending in a predetermined length so as to be parallel to each other when viewed in a cross section perpendicular to the axial direction, and provided on one end side of the suction portion, It has a guide part which guides a magnetic foreign material to the adsorption part.

上記発明によれば、粉粒体又は流体から磁性異物を除去すべく、粉粒体又は流体を、棒状磁石の一端側に向けて進行させた場合に、棒状磁石のガイド部によって、粉粒体又は流体を、棒状磁石の一端側に滞留しにくくさせて、吸着部へ向けてスムーズに案内することができると共に、吸着部の一対の吸着面が、互いに平行となるように所定長さで伸びているので、強磁場が発生する吸着面を、従来の断面涙型のバーマグネットの境界部Pのように線状ではなく(図8B参照)、棒状磁石の軸方向に直交する方向に伸びる面状とすることができるため、強磁場が発生する領域の面積を広く確保することでき、その結果、粉粒体又は流体に含有される磁性異物を、しっかりと吸着することができ、磁性異物の吸着漏れを少なくして効率よく除去することができる。   According to the above invention, when the granular material or fluid is advanced toward one end of the rod-shaped magnet in order to remove the magnetic foreign matter from the granular material or fluid, the granular material is moved by the guide portion of the rod-shaped magnet. Alternatively, fluid can be prevented from staying at one end of the rod-shaped magnet and can be smoothly guided toward the suction portion, and the pair of suction surfaces of the suction portion can be extended by a predetermined length so as to be parallel to each other. Therefore, the attracting surface where the strong magnetic field is generated is not linear like the boundary portion P of the conventional cross-section tear bar magnet (see FIG. 8B), but extends in a direction perpendicular to the axial direction of the bar magnet. Therefore, it is possible to secure a wide area of the region where the strong magnetic field is generated, and as a result, it is possible to firmly adsorb the magnetic foreign matter contained in the powder or fluid, Efficient removal by reducing adsorption leakage It is possible.

本発明の棒状磁石においては、前記棒状磁石の外周に適合する形状をなし、非磁性材料からなるカバーを有しており、このカバー内に前記棒状磁石が挿脱可能とされていることが好ましい。   In the rod-shaped magnet of the present invention, it is preferable that the rod-shaped magnet has a shape adapted to the outer periphery of the rod-shaped magnet, and has a cover made of a non-magnetic material, and the rod-shaped magnet can be inserted into and removed from the cover. .

上記態様によれば、棒状磁石の外周に適合する形状をなし、非磁性材料からなるカバーを有しており、このカバー内に棒状磁石が挿脱可能とされているので、カバー内に棒状磁石を挿入した状態で、粉粒体又は流体からの磁性異物の除去作業が行われると、棒状磁石の磁力によって、カバー表面に磁性異物を吸着させることができる。また、磁性異物の吸着後に、棒状磁石をカバー内から引き抜くことで、磁力が消失するため、カバー表面から磁性異物を離脱させて分離することができる。すなわち、磁性異物の吸着はカバーを介して行われ、棒状磁石には磁性異物が直接吸着しないため、棒状磁石のクリーニングが不要となり、磁性異物除去の作業性を高めることができる。   According to the above aspect, the rod-shaped magnet has a shape that fits the outer periphery of the rod-shaped magnet, and has a cover made of a non-magnetic material. The rod-shaped magnet can be inserted into and removed from the cover. When the magnetic foreign matter is removed from the granular material or the fluid with the inserted, the magnetic foreign matter can be attracted to the cover surface by the magnetic force of the bar magnet. Further, after the magnetic foreign matter is attracted, the magnetic force disappears by pulling out the bar magnet from the cover, so that the magnetic foreign matter can be detached from the cover surface and separated. That is, the magnetic foreign matter is attracted through the cover, and the magnetic foreign matter is not directly attracted to the rod-shaped magnet. Therefore, the cleaning of the rod-shaped magnet becomes unnecessary, and the workability of removing the magnetic foreign matter can be improved.

本発明の棒状磁石においては、前記棒状磁石は、複数の磁石を軸方向に連結して形成されており、前記棒状磁石を構成する各磁石の接合面は、同じ極どうしとされていることが好ましい。   In the rod-shaped magnet of the present invention, the rod-shaped magnet is formed by connecting a plurality of magnets in the axial direction, and the joint surfaces of the magnets constituting the rod-shaped magnet are the same poles. preferable.

上記態様によれば、棒状磁石は、複数の磁石を軸方向に連結して形成されており、棒状磁石を構成する各磁石の接合面は、同じ極どうしとされているので、磁場が強く作用する範囲を、棒状磁石の軸方向に増大させることができ、その結果、磁性異物が吸着されず素通りすることを抑制して、磁性異物の吸着漏れを効果的に防止することができる。   According to the above aspect, the rod-shaped magnet is formed by connecting a plurality of magnets in the axial direction, and the joint surfaces of the magnets constituting the rod-shaped magnet are the same poles, so that the magnetic field acts strongly. The range to be increased can be increased in the axial direction of the bar-shaped magnet. As a result, the magnetic foreign matter is prevented from passing through without being attracted, and the magnetic foreign matter can be effectively prevented from leaking.

本発明の棒状磁石においては、前記棒状磁石を構成する各磁石の、各接合面は、前記棒状磁石の軸方向に対して、所定角度で傾いて互いに平行とされていることが好ましい。   In the rod-shaped magnet of the present invention, it is preferable that the joint surfaces of the magnets constituting the rod-shaped magnet are inclined parallel to each other at a predetermined angle with respect to the axial direction of the rod-shaped magnet.

上記態様によれば、棒状磁石を構成する各磁石の、各接合面は、棒状磁石の軸方向に対して、所定角度で傾いて互いに平行とされているので、棒状磁石の軸方向に直交する方向に、磁場が強い箇所が存在することになり、磁性異物が、磁場が弱い箇所を素通りしても、磁場が強い箇所によって吸着させることができ、磁性異物を吸着漏れをより効果的に防止することができる。   According to the above aspect, the joining surfaces of the magnets constituting the rod-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the rod-shaped magnet and are parallel to each other, and thus are orthogonal to the axial direction of the rod-shaped magnet. In the direction, there will be a place where the magnetic field is strong, and even if the magnetic foreign matter passes through the place where the magnetic field is weak, it can be attracted by the place where the magnetic field is strong, and the magnetic foreign matter can be prevented more effectively. can do.

本発明のもう一つは、磁性異物を含む粉粒体又は流体から、前記磁性異物を磁場によっ
て吸着除去する、磁性異物除去装置であって、前記粉粒体又は流体を導入する導入口、及び、前記粉粒体又は流体を排出する排出口を有するケーシングと、前記ケーシング内に配置され、所定長さで棒状に伸びる複数の棒状磁石とを有し、前記棒状磁石は、その軸方向に直交する断面で見たときに、互いに平行となるように所定長さで伸びる一対の吸着面を設けた吸着部と、該吸着部の一端側に設けられ、前記磁性異物を前記吸着部へ案内するガイド部とを有しており、前記棒状磁石は、所定隙間を空けて平行に、かつ、前記一端側を前記粉粒体又は流体の進行方向に向けた状態で、前記ケーシング内に複数並列して配置されていることを特徴とする。
Another aspect of the present invention is a magnetic foreign matter removing device that removes the magnetic foreign matter by a magnetic field from a granular material or fluid containing the magnetic foreign matter, and an inlet for introducing the granular material or fluid, and , A casing having a discharge port for discharging the granular material or fluid, and a plurality of rod-shaped magnets disposed in the casing and extending in a rod shape with a predetermined length, the rod-shaped magnet being orthogonal to the axial direction thereof And a suction portion provided with a pair of suction surfaces extending in a predetermined length so as to be parallel to each other when viewed in a cross section, and provided on one end side of the suction portion, and guides the magnetic foreign matter to the suction portion A plurality of the bar-shaped magnets are arranged in parallel in the casing with a predetermined gap in parallel and with the one end side directed in the traveling direction of the granular material or fluid. It is characterized by being arranged.

上記発明によれば、棒状磁石は、その軸方向に直交する断面で見たときに、吸着部の一端側に、磁性異物を吸着部へ案内するガイド部を有していると共に、所定隙間を空けて平行に、かつ、一端側を粉粒体又は流体の進行方向に向けた状態で、ケーシング内に複数並列して配置されているので、導入口から導入される粉粒体又は流体を、棒状磁石の一端側に滞留しにくくさせて、各棒状磁石の吸着部へ向けてスムーズに案内することができる。また、棒状磁石の吸着部は、互いに平行となるように所定長さで伸びる一対の吸着面を有しているので、強磁場が発生する吸着面を、従来の断面涙型のバーマグネットの境界部Pのように線状ではなく、棒状磁石の軸方向に直交する方向に伸びる面状とすることができるため、強磁場が発生する領域の面積を広く確保することでき、隣接する磁石の吸着面どうしの隙間に入り込む、粉粒体又は流体に含有される磁性異物を、しっかりと吸着することができ、磁性異物の吸着漏れを少なくして効率よく除去することができる。   According to the above invention, the rod-shaped magnet has the guide portion for guiding the magnetic foreign matter to the attracting portion on one end side of the attracting portion when viewed in a cross section orthogonal to the axial direction, and has a predetermined gap. Since it is arranged in parallel in the casing in a state where one end side is directed in the traveling direction of the granular material or fluid, the granular material or fluid introduced from the introduction port, It is made difficult to stay on one end side of the bar-shaped magnet, and can be smoothly guided toward the attracting portion of each bar-shaped magnet. In addition, since the attracting part of the bar-shaped magnet has a pair of attracting surfaces extending in a predetermined length so as to be parallel to each other, the attracting surface where the strong magnetic field is generated is connected to the boundary of the conventional cross-section tear bar-shaped bar magnet. Since it can be made into a planar shape extending in a direction perpendicular to the axial direction of the rod-shaped magnet, as in the part P, it is possible to secure a large area of a region where a strong magnetic field is generated, and to adsorb adjacent magnets Magnetic foreign substances contained in the powder or fluid that enter the gaps between the surfaces can be firmly adsorbed, and can be efficiently removed with less leakage of magnetic foreign substances.

本発明の磁性異物除去装置においては、前記ケーシング内には、非磁性材料からなり、前記棒状磁石の外周に適合して被せられる複数のカバーが前記棒状磁石の配列と整合するように配置されており、前記棒状磁石は、対応する前記カバー内に挿脱可能とされていることが好ましい。   In the magnetic foreign matter removing apparatus according to the present invention, a plurality of covers made of a non-magnetic material and fitted on the outer circumference of the bar magnet are arranged in the casing so as to be aligned with the arrangement of the bar magnets. In addition, it is preferable that the rod-shaped magnet can be inserted into and removed from the corresponding cover.

上記態様によれば、非磁性材料からなり、棒状磁石の外周に適合して被せられる複数のカバーが棒状磁石の配列と整合するように配置されており、棒状磁石は対応するカバー内に挿脱可能とされているので、カバー内に棒状磁石を挿入した状態でケーシング内に配置し、粉粒体又は流体からの磁性異物の除去作業が行われると、棒状磁石の磁力によって、カバー表面に磁性異物を吸着させることができる。また、磁性異物の吸着後に、棒状磁石をカバー内から引き抜くことで、磁力が消失するため、カバー表面から磁性異物を離脱させて分離することができる。すなわち、磁性異物の吸着はカバーを介して行われ、棒状磁石には磁性異物が直接吸着しないため、棒状磁石のクリーニングが不要となり、磁性異物除去の作業性を高めることができる。   According to the above aspect, the plurality of covers that are made of a non-magnetic material and are fitted on the outer periphery of the bar magnet are arranged so as to be aligned with the arrangement of the bar magnets, and the bar magnets are inserted into and removed from the corresponding covers. If it is placed in the casing with the rod-shaped magnet inserted in the cover and the magnetic foreign matter is removed from the powder or fluid, the magnetic force of the rod-shaped magnet will cause the magnet to magnetize the cover surface. Foreign matter can be adsorbed. Further, after the magnetic foreign matter is attracted, the magnetic force disappears by pulling out the bar magnet from the cover, so that the magnetic foreign matter can be detached from the cover surface and separated. That is, the magnetic foreign matter is attracted through the cover, and the magnetic foreign matter is not directly attracted to the rod-shaped magnet. Therefore, the cleaning of the rod-shaped magnet becomes unnecessary, and the workability of removing the magnetic foreign matter can be improved.

本発明の磁性異物除去装置においては、前記棒状磁石は、複数の磁石を軸方向に連結して形成されており、前記棒状磁石を構成する各磁石の接合面は、同じ極どうしとされていることが好ましい。   In the magnetic foreign matter removing apparatus of the present invention, the bar magnet is formed by connecting a plurality of magnets in the axial direction, and the joint surfaces of the magnets constituting the bar magnet are the same poles. It is preferable.

上記態様によれば、棒状磁石は、複数の磁石を軸方向に連結して形成されており、棒状磁石を構成する各磁石の接合面は、同じ極どうしとされているので、磁場が強く作用する範囲を、棒状磁石の軸方向に増大させることができ、その結果、磁性異物が吸着されず素通りすることを抑制して、磁性異物の吸着漏れを効果的に防止することができる。   According to the above aspect, the rod-shaped magnet is formed by connecting a plurality of magnets in the axial direction, and the joint surfaces of the magnets constituting the rod-shaped magnet are the same poles, so that the magnetic field acts strongly. The range to be increased can be increased in the axial direction of the bar-shaped magnet. As a result, the magnetic foreign matter is prevented from passing through without being attracted, and the magnetic foreign matter can be effectively prevented from leaking.

本発明の磁性異物除去装置においては、前記棒状磁石を構成する各磁石の、各接合面は、前記棒状磁石の軸方向に対して、所定角度で傾いて互いに平行とされていることが好ましい。   In the magnetic foreign matter removing apparatus of the present invention, it is preferable that the joint surfaces of the magnets constituting the rod-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the rod-shaped magnet and are parallel to each other.

上記態様によれば、棒状磁石を構成する各磁石の、各接合面は、棒状磁石の軸方向に対
して、所定角度で傾いて互いに平行とされているので、棒状磁石の軸方向に直交する方向に、磁場が強い箇所が存在することになり、磁性異物が、磁場が弱い箇所を素通りしても、磁場が強い箇所によって吸着させることができ、磁性異物の吸着漏れをより効果的に防止することができる。
According to the above aspect, the joining surfaces of the magnets constituting the rod-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the rod-shaped magnet and are parallel to each other, and thus are orthogonal to the axial direction of the rod-shaped magnet. In the direction, there will be a place where the magnetic field is strong, and even if the magnetic foreign matter passes through the place where the magnetic field is weak, it can be adsorbed by the strong magnetic field, preventing the magnetic foreign matter from leaking more effectively. can do.

本発明の磁性異物除去装置においては、前記棒状磁石は、前記一端側を回動方向に向けて、回動軸に対して放射状に連結されており、前記ケーシングの内周において回動可能とされていることが好ましい。   In the magnetic foreign matter removing apparatus of the present invention, the rod-shaped magnet is radially connected to the rotation shaft with the one end side directed in the rotation direction, and is rotatable on the inner periphery of the casing. It is preferable.

上記態様によれば、棒状磁石は回動軸に連結されており、ケーシングの内周において回動可能とされているので、例えば、粉粒体が凝集しているような場合であっても、棒状磁石の回動により攪拌されて分散するため、各棒状磁石による磁性異物の吸着効率を高めることができる。   According to the above aspect, since the rod-shaped magnet is connected to the rotating shaft and can be rotated on the inner periphery of the casing, for example, even when the powder particles are aggregated, Since it is stirred and dispersed by the rotation of the bar-shaped magnet, it is possible to increase the adsorption efficiency of the magnetic foreign matter by each bar-shaped magnet.

本発明によれば、粉粒体又は流体から磁性異物を除去すべく、粉粒体又は流体を、棒状磁石の一端側に向けて進行させた場合に、棒状磁石のガイド部によって、粉粒体又は流体を、棒状磁石の一端側に滞留しにくくさせて、吸着部へ向けてスムーズに案内することができると共に、吸着部の一対の吸着面が、互いに平行となるように所定長さで伸びているので、強磁場が発生する吸着面を、棒状磁石の軸方向に直交する方向に伸びる面状とすることができるため、強磁場が発生する領域の面積を広く確保することでき、粉粒体又は流体に含有される磁性異物を、しっかりと吸着することができ、磁性異物の吸着漏れを少なくして効率よく除去することができる。   According to the present invention, when the granular material or fluid is advanced toward one end of the rod-shaped magnet in order to remove magnetic foreign substances from the granular material or fluid, the granular material is moved by the guide portion of the rod-shaped magnet. Alternatively, fluid can be prevented from staying at one end of the rod-shaped magnet and can be smoothly guided toward the suction portion, and the pair of suction surfaces of the suction portion can be extended by a predetermined length so as to be parallel to each other. Therefore, since the attracting surface on which the strong magnetic field is generated can be a surface extending in the direction perpendicular to the axial direction of the rod-shaped magnet, the area of the region in which the strong magnetic field is generated can be secured widely, Magnetic foreign substances contained in the body or fluid can be firmly adsorbed, and can be efficiently removed with less leakage of magnetic foreign substances.

本発明に係る棒状磁石の一実施形態を示しており、同棒状磁石を軸方向側から見た状態の説明図、及び、側面から見た状態の説明図である。One Embodiment of the rod-shaped magnet which concerns on this invention is shown, It is explanatory drawing of the state which looked at the rod-shaped magnet from the axial direction side, and explanatory drawing of the state seen from the side surface. 本発明に係る棒状磁石の一実施形態を示しており、その斜視図である。1 is a perspective view showing an embodiment of a bar-shaped magnet according to the present invention. 同棒状磁石の側面図である。It is a side view of the bar magnet. 同棒状磁石を軸方向側から見た状態を示しており、図4Aは第1他形状の説明図、図4Bは第2他形状の説明図、図4Cは第3他形状の説明図である。FIG. 4A is a diagram illustrating the first other shape, FIG. 4B is a diagram illustrating the second other shape, and FIG. 4C is a diagram illustrating the third other shape. . 本発明に係る磁性異物除去装置の第1実施形態を示しており、図5Aはその平面図、図5Bは断面図である。1 shows a first embodiment of a magnetic foreign matter removing apparatus according to the present invention, in which FIG. 5A is a plan view and FIG. 5B is a cross-sectional view. 同磁性異物除去装置において、複数の棒状磁石をセットする際の状態を示す説明図である。It is explanatory drawing which shows the state at the time of setting a some rod-shaped magnet in the magnetic foreign material removal apparatus. 同磁性異物除去装置において、並列して配置された複数の棒状磁石の、平面図である。In the same magnetic foreign material removal apparatus, it is a top view of the some rod-shaped magnet arrange | positioned in parallel. 図8Aは同磁性異物除去装置の使用状態を示す説明図、図8Bは従来構造のを示す説明図である。FIG. 8A is an explanatory view showing a usage state of the magnetic foreign matter removing apparatus, and FIG. 8B is an explanatory view showing a conventional structure. 本発明に係る磁性異物除去装置の第2実施形態を示しており、その要部斜視図である。The 2nd Embodiment of the magnetic foreign material removal apparatus which concerns on this invention is shown, and it is the principal part perspective view. 図10Aは同磁性異物除去装置の正面図、図10Bは同磁性異物除去装置の平面図である。FIG. 10A is a front view of the magnetic foreign matter removing apparatus, and FIG. 10B is a plan view of the magnetic foreign matter removing apparatus. 本発明に係る磁性異物除去装置の第3実施形態を示す平面説明図である。It is plane explanatory drawing which shows 3rd Embodiment of the magnetic foreign material removal apparatus which concerns on this invention.

以下、図1〜4を参照して、本発明に係る棒状磁石の一実施形態について説明する。   Hereinafter, with reference to FIGS. 1-4, one Embodiment of the rod-shaped magnet which concerns on this invention is described.

図2及び図3に示すように、この実施形態における棒状磁石10は、所定厚さで形成された磁石20を、連結軸21を介して複数連結して、全体として棒状に形成された構造と
なっている。図1を併せて参照すると、各磁石20は、その軸方向(厚さ方向)に直交する断面が、略涙型をなすと共に、その両側面が互いに平行な吸着面29,29でカットされたような形状をなしている。
As shown in FIGS. 2 and 3, the rod-shaped magnet 10 in this embodiment has a structure in which a plurality of magnets 20 having a predetermined thickness are coupled via a coupling shaft 21 and formed as a rod as a whole. It has become. Referring also to FIG. 1, each magnet 20 has a cross section perpendicular to its axial direction (thickness direction) substantially cut into a teardrop shape, and both side surfaces thereof are cut by suction surfaces 29 and 29 parallel to each other. It has a shape like this.

図1を参照して具体的に説明すると、各磁石20は、長軸A及びこれに直交する短軸Bを有しており、長軸Aの一端23がやや丸みを帯びた形状をなしている。そして、各磁石20は、その軸方向に直交する断面で見たときに、互いに平行となるように所定長さで伸びる一対の吸着面29,29を設けた吸着部30と、該吸着部30の、長軸A方向の一端側に設けられ、磁性異物Mを吸着部30へ案内するガイド部28とを有している。前記ガイド部28は、磁石20の一端23側から、長軸Aの他端25側に向けて次第に幅広となる一対の斜面27,27を有している。   Specifically, with reference to FIG. 1, each magnet 20 has a long axis A and a short axis B orthogonal thereto, and one end 23 of the long axis A has a slightly rounded shape. Yes. Each magnet 20 has a suction portion 30 provided with a pair of suction surfaces 29 and 29 extending in a predetermined length so as to be parallel to each other when viewed in a cross section orthogonal to the axial direction thereof, and the suction portion 30. The guide portion 28 is provided on one end side in the long axis A direction and guides the magnetic foreign matter M to the suction portion 30. The guide portion 28 has a pair of inclined surfaces 27, 27 that gradually become wider from the one end 23 side of the magnet 20 toward the other end 25 side of the long axis A.

一方、吸着部30は、ガイド部28の一対の斜面27,27の、他端25寄りの端部から、互いに平行となるように所定長さで伸びる一対の吸着面29,29を有している。また、吸着部30の、長軸A方向の他端側(前記ガイド部28とは反対側)には、丸みを帯びた基端部32が設けられている。この基端部32は、吸着部30を構成する一対の吸着面29,29の、他端25寄りの端部から、略半円状に伸びる曲面31を有しており、その底部(すなわち、前記一端23から最も離れた位置)が、前記他端25をなしている。なお、図1に示すように、磁石20の一端23から他端25までの長さを、磁石20の全長L1とし、吸着面29の一端23から他端25に沿った長さを、吸着面29の長さL2とする。   On the other hand, the suction portion 30 has a pair of suction surfaces 29 and 29 extending from the end portions of the pair of inclined surfaces 27 and 27 of the guide portion 28 near the other end 25 so as to be parallel to each other. Yes. Further, a rounded base end portion 32 is provided on the other end side of the suction portion 30 in the major axis A direction (the side opposite to the guide portion 28). The base end portion 32 has a curved surface 31 extending in a substantially semicircular shape from an end portion of the pair of suction surfaces 29, 29 constituting the suction portion 30 near the other end 25. The position farthest from the one end 23) forms the other end 25. As shown in FIG. 1, the length from one end 23 to the other end 25 of the magnet 20 is the total length L1 of the magnet 20, and the length along the other end 25 from the one end 23 of the attracting surface 29 is the attracting surface. The length L2 is 29.

また、この実施形態におけるガイド部28の頂部(一端23)は、図1に示すように、やや丸みを帯びた形状となっているが、この頂部を半円形状としたり、尖った形状としたりしてもよく、特に限定はされない。   Further, as shown in FIG. 1, the top portion (one end 23) of the guide portion 28 in this embodiment has a slightly rounded shape, but this top portion may be semicircular or pointed. There is no particular limitation.

更に、吸着部30を構成する互いに平行な一対の吸着面29,29は、この実施形態では平坦面状をなしている。ただし、これらの一対の吸着面29,29は必ずしも平坦面状でなくてもよく、その表面に微少な凹凸があったり、部分的に、凹部や凸部、テーパ面を有していたりしてもよく、一対の吸着面29,29が全体として平行に伸びるような形状であればよい。   Further, the pair of parallel suction surfaces 29 and 29 constituting the suction portion 30 has a flat surface shape in this embodiment. However, the pair of suction surfaces 29 and 29 do not necessarily have a flat surface shape, and the surface thereof has minute unevenness, or partially has a recess, a protrusion, or a tapered surface. Alternatively, the shape may be such that the pair of suction surfaces 29 and 29 extend in parallel as a whole.

また、図3に示すように、棒状磁石10の軸方向に沿って隣接配置された磁石20,20は、その対向する接合面33,33を、同じ極どうし(N極とN極どうし、S極とS極どうし)にして、純鉄や低炭素鋼等からなる板状のヨーク39を介して接合されている。そして、板状のヨーク39は、棒状磁石10の軸心(連結軸21の中心)に対して、所定角度で傾いて互いに平行に配置されている。すなわち、棒状磁石10を構成する各磁石20の、各接合面33,33は、棒状磁石10の軸方向に対して、所定角度で傾いて互いに平行とされている。   Further, as shown in FIG. 3, the magnets 20 and 20 arranged adjacent to each other along the axial direction of the rod-shaped magnet 10 have their facing joint surfaces 33 and 33 arranged on the same pole (N pole and N pole, S Are joined via a plate-like yoke 39 made of pure iron, low carbon steel or the like. The plate-like yokes 39 are arranged in parallel to each other at an angle with respect to the axis of the bar-shaped magnet 10 (the center of the connecting shaft 21). That is, the joint surfaces 33 and 33 of the magnets 20 constituting the rod-shaped magnet 10 are inclined at a predetermined angle with respect to the axial direction of the rod-shaped magnet 10 and are parallel to each other.

なお、この実施形態では、透磁率を高めるために、隣接する磁石20,20の間に板状のヨーク39を配置しているが、磁石20どうしが直接接合されていてもよく、所定の間隙を設けて配置されていてもよい。   In this embodiment, in order to increase the magnetic permeability, the plate-like yoke 39 is disposed between the adjacent magnets 20, 20. However, the magnets 20 may be directly joined to each other, and a predetermined gap is provided. May be provided.

また、棒状磁石としては、例えば、図4A,図4BC,図4Cに示すような形状としてもよい。図4Aに示す棒状磁石10Aは、吸着部30を構成する一対の吸着面29,29の端部に、同吸着面29,29に対して直交する直交面31aを有しており、該直交面31aが他端25をなしている。すなわち、この棒状磁石10Aは、前記実施形態の棒状磁石10のような基端部32が存在しない形状となっている。ただし、吸着面29と直交面31aとの境界部(角部)は、アール状をなしていることが好ましい。   Moreover, as a rod-shaped magnet, it is good also as a shape as shown, for example in FIG. 4A, FIG. 4BC, and FIG. 4C. A rod-shaped magnet 10A shown in FIG. 4A has orthogonal surfaces 31a orthogonal to the attracting surfaces 29, 29 at the ends of the pair of attracting surfaces 29, 29 constituting the attracting portion 30. 31 a forms the other end 25. That is, the rod-shaped magnet 10A has a shape in which the base end portion 32 does not exist like the rod-shaped magnet 10 of the embodiment. However, the boundary portion (corner portion) between the suction surface 29 and the orthogonal surface 31a is preferably rounded.

一方、図4Bに示す棒状磁石10Bは、吸着部30を構成する一対の吸着面29,29の端部から、他端25に向けて次第に幅狭となるテーパ面37,37を有しており、その交差端部が他端25となっている。すなわち、基端部32は、その外周面にテーパ面37,37を有している。   On the other hand, the bar-shaped magnet 10 </ b> B shown in FIG. 4B has tapered surfaces 37 and 37 that gradually become narrower from the end portions of the pair of attracting surfaces 29 and 29 constituting the attracting portion 30 toward the other end 25. The crossing end is the other end 25. That is, the base end portion 32 has tapered surfaces 37 and 37 on the outer peripheral surface thereof.

また、図4Cに示す棒状磁石10Cは、基本的には図1に示す棒状磁石10と同様の構造をなしているが、吸着部30を構成する一対の吸着面29,29の長さL2が、前記棒状磁石10の吸着面29の長さL2よりも短い形状となっている。   4C basically has the same structure as the rod-shaped magnet 10 shown in FIG. 1, but the length L2 of the pair of attracting surfaces 29, 29 constituting the attracting portion 30 is the same. The shape is shorter than the length L2 of the attracting surface 29 of the rod-shaped magnet 10.

なお、本発明における棒状磁石としては、一対の吸着面を有する吸着部と、ガイド部とを有する構造であれば、特に限定はされない。また、棒状磁石10を構成する磁石20の個数は、特に限定されない。更に棒状磁石としては、複数の磁石を連結して構成するのではなく、所定長さで伸びる一本の長い磁石から構成してもよい。   In addition, if it is a structure which has the adsorption | suction part which has a pair of adsorption | suction surface, and a guide part as a rod-shaped magnet in this invention, it will not specifically limit. Further, the number of magnets 20 constituting the rod-shaped magnet 10 is not particularly limited. Furthermore, the rod-shaped magnet may be composed of a single long magnet that extends at a predetermined length, instead of being configured by connecting a plurality of magnets.

また、この実施形態では、棒状磁石10の外周に、例えば、オーステナイト系ステンレスや、アルミニウム合金、合成樹脂等の非磁性材料からなる、カバー40が被さるようになっている。このカバー40は、棒状磁石10を構成する磁石20に適合する外周形状をなすと共に、棒状磁石10の軸方向全長よりも長く形成されている。すなわち、この実施形態のカバー40は、磁石20の一対の斜面27,27に対応する傾斜角度で形成された一対の斜面47,47と、該一対の斜面47,47の他端寄りの端部から、互いに平行に伸びる一対の吸着面49,49とを有している。そして、このカバー40内に、複数の磁石20からなる棒状磁石10が、挿脱可能となっている。   Moreover, in this embodiment, the cover 40 which consists of nonmagnetic materials, such as an austenitic stainless steel, an aluminum alloy, a synthetic resin, for example, covers the outer periphery of the rod-shaped magnet 10. The cover 40 has an outer peripheral shape that matches the magnet 20 constituting the rod-shaped magnet 10 and is longer than the entire axial length of the rod-shaped magnet 10. That is, the cover 40 of this embodiment includes a pair of slopes 47, 47 formed at an inclination angle corresponding to the pair of slopes 27, 27 of the magnet 20, and end portions near the other end of the pair of slopes 47, 47. And a pair of suction surfaces 49, 49 extending in parallel with each other. And the rod-shaped magnet 10 which consists of the some magnet 20 in this cover 40 is insertable / removable.

次に、上記構成からなる棒状磁石を用いた、本発明に係る磁性異物除去装置の、第1実施形態について説明する。   Next, a first embodiment of the magnetic foreign matter removing apparatus according to the present invention using the rod-shaped magnet having the above configuration will be described.

図5Aに示すように、この実施形態の磁性異物除去装置50(以下、「除去装置50」ともいう)は、略四角形の箱形状をなしたケーシング51を有している。図5Bを併せて参照すると、このケーシング51は、その上方に、粉粒体又は流体(以下、「粉粒体等」ともいう)を導入するための導入口53が形成されている。更にケーシング51の下方には、金属片等の磁性異物を棒状磁石10で吸着除去した後の粉粒体等を、ケーシング51内から排出するための、排出口55が形成されている。   As shown in FIG. 5A, a magnetic foreign matter removing device 50 (hereinafter, also referred to as “removing device 50”) of this embodiment includes a casing 51 having a substantially rectangular box shape. Referring also to FIG. 5B, the casing 51 is formed with an inlet 53 for introducing a powder or fluid (hereinafter also referred to as “powder or the like”) above the casing 51. Further, below the casing 51, a discharge port 55 is formed for discharging, from the casing 51, powder particles and the like after the magnetic foreign matters such as metal pieces are attracted and removed by the rod-shaped magnet 10.

また、ケーシング51の一側壁は、他の側壁に対して近接離反して、開閉可能とされたスライド壁部57となっている。なお、ケーシング51とスライド壁部57との間には、ケーシング51に対してスライド壁部57を閉じた状態に保持固定するための、図示しない保持手段が設けられている。   Also, one side wall of the casing 51 is a slide wall portion 57 that can be opened and closed while approaching and separating from the other side wall. A holding means (not shown) for holding and fixing the slide wall 57 in a closed state with respect to the casing 51 is provided between the casing 51 and the slide wall 57.

更にスライド壁部57には、上述した棒状磁石10が、その一端23側を、導入口53側に向くように上方に向けて、複数取付けられている。すなわち、ケーシング51の導入口53から導入された粉粒体等は、ケーシング51の下方に向けて落下するが、この実施形態における棒状磁石10は、その一端23側を粉粒体等の進行方向(ケーシング上方から下方に向けて進行する)に向けた状態で、ケーシング51内に複数並列して配置されている。   Further, a plurality of the above-described rod-shaped magnets 10 are attached to the slide wall portion 57 with one end 23 side facing upward toward the introduction port 53 side. That is, the granular material or the like introduced from the introduction port 53 of the casing 51 falls toward the lower side of the casing 51, but the rod-like magnet 10 in this embodiment has one end 23 side in the traveling direction of the granular material or the like. A plurality of them are arranged in parallel in the casing 51 in a state in which they proceed (from the upper side of the casing toward the lower side).

具体的には、図5Bに示すように、ケーシング51の高さ方向上方及び下方において、ケーシング51の幅方向(高さ方向に直交する方向)に沿って、4個の棒状磁石10が均等な間隔を空けて並列して配置されている。また、ケーシング51の高さ方向中間には、上方又は下方に配置された4個の棒状磁石10に対して千鳥状をなすように、3個の棒状
磁石10が、ケーシング51の幅方向に沿って並列して配置されている。すなわち、上方又は下方に配置される棒状磁石10,10の間に、高さ方向中間に配置される棒状磁石10が位置している。
Specifically, as shown in FIG. 5B, the four bar-shaped magnets 10 are evenly distributed along the width direction of the casing 51 (direction perpendicular to the height direction) above and below the height direction of the casing 51. They are arranged in parallel at intervals. Further, in the middle of the casing 51 in the height direction, the three bar magnets 10 extend along the width direction of the casing 51 so as to form a staggered shape with respect to the four bar magnets 10 arranged above or below. Are arranged in parallel. That is, the bar-shaped magnet 10 disposed in the middle in the height direction is positioned between the bar-shaped magnets 10 and 10 disposed above or below.

また、図7の平面図に示すように、ケーシング51に対して同じ高さ位置において、隣接して配置される棒状磁石10,10は、その吸着面29,29が、同じ極どうしとなるように(N極とN極どうし、S極とS極どうし)、所定間隔を空けて配列されている。その結果、棒状磁石10,10の吸着面29,29の間には、互いに反発しあう磁場が作用するようになっている(図7参照)。   Further, as shown in the plan view of FIG. 7, the adsorbing surfaces 29 and 29 of the bar magnets 10 and 10 arranged adjacent to each other at the same height position with respect to the casing 51 have the same poles. (N poles and N poles, S poles and S poles) are arranged at a predetermined interval. As a result, magnetic fields that repel each other act between the attracting surfaces 29 and 29 of the bar magnets 10 and 10 (see FIG. 7).

なお、この実施形態では、ケーシング51の幅方向に並列した配置された複数の棒状磁石10が、ケーシング51の高さ方向において3段で配列されているが、例えば、ケーシング51の高さ方向に4段や5段、或いはそれ以上の多段で配列してもよい。また、この実施形態では、棒状磁石10の一端23側を、ケーシング51の導入口53である上方に向けて配置しているが、棒状磁石の一端側が粉粒体等の進行方向に向けて配置されていればよく、この態様には限定されない(他の実施形態において説明する)。   In this embodiment, the plurality of bar magnets 10 arranged in parallel in the width direction of the casing 51 are arranged in three stages in the height direction of the casing 51. For example, in the height direction of the casing 51, It may be arranged in four stages, five stages, or more stages. Moreover, in this embodiment, although the one end 23 side of the rod-shaped magnet 10 is arrange | positioned toward the upper direction which is the inlet 53 of the casing 51, the one end side of a rod-shaped magnet is arrange | positioned toward the advancing direction of a granular material etc. However, the present invention is not limited to this mode (described in other embodiments).

また、図5Aに示すように、ケーシング51内には、上述したカバー40を複数支持するための、支持板59が配置されている。この支持板59は、図示しない取付具を介して、ケーシング中央に着脱可能に取付けられるようになっている。また、支持板59には、図示しないカバー固定孔が複数形成されており、各カバー固定孔に前記カバー40がそれぞれ挿入されて固定される。なお、図5Bに示すように、複数のカバー40の配列は、上述したスライド壁部57に取付けられた複数の棒状磁石10に対応して、支持板59の高さ方向上方及び下方に4つのカバー40がそれぞれ固定され、支持板59の高さ方向中間に3つのカバー40が千鳥状に配置固定されている。   Further, as shown in FIG. 5A, a support plate 59 for supporting a plurality of the above-described covers 40 is disposed in the casing 51. The support plate 59 is detachably attached to the center of the casing via a fixture (not shown). The support plate 59 is formed with a plurality of cover fixing holes (not shown), and the cover 40 is inserted and fixed in each cover fixing hole. As shown in FIG. 5B, the arrangement of the plurality of covers 40 is four above and below in the height direction of the support plate 59 corresponding to the plurality of bar magnets 10 attached to the slide wall portion 57 described above. The covers 40 are fixed, and the three covers 40 are arranged and fixed in a staggered manner in the middle of the support plate 59 in the height direction.

また、図5Bに示すように、ケーシング上方には、断面山状をなしたガイド板65が複数配置されている。このガイド板65は、導入口53から導入される粉粒体等をガイドして、各棒状磁石10に導きやすくする。   Further, as shown in FIG. 5B, a plurality of guide plates 65 having a mountain shape in cross section are arranged above the casing. The guide plate 65 guides the powder and the like introduced from the introduction port 53 so that the guide plate 65 can be easily guided to each bar magnet 10.

次に、上記構造からなる棒状磁石10及び該棒状磁石10を用いた除去装置50の、使用方法及び作用効果について説明する。   Next, the usage method and the effect of the rod-shaped magnet 10 having the above structure and the removing device 50 using the rod-shaped magnet 10 will be described.

まず、図6に示すように、除去装置50のスライド壁部57が開いた状態から、支持板59を介してケーシング51側に固定された複数のカバー40に対して、スライド壁部57に取付けられた複数の棒状磁石10を整合させて、ケーシング51に対してスライド壁部57を押し込む。そして、各カバー40内に、各棒状磁石10を軸方向一端側からそれぞれ挿入すると共に、図示しない保持装置によって、ケーシング51に対してスライド壁部57を閉じた状態に保持する(図5B参照)。   First, as shown in FIG. 6, the slide wall portion 57 of the removing device 50 is attached to the slide wall portion 57 with respect to the plurality of covers 40 fixed to the casing 51 side via the support plate 59 from the opened state. The plurality of bar magnets 10 thus aligned are aligned, and the slide wall portion 57 is pushed into the casing 51. Then, each bar magnet 10 is inserted into each cover 40 from one end side in the axial direction, and the slide wall 57 is held in a closed state with respect to the casing 51 by a holding device (not shown) (see FIG. 5B). .

上記状態で、ケーシング上方の導入口53から粉粒体Gを導入すると、図5Bや図8Aに示すように、該粉粒体Gは、複数のガイド板65を介して、ケーシング上方に配置された棒状磁石10の一端23側に落下したり、或いは、ケーシング上方に配置された棒状磁石10,10の間を通り抜けて、ケーシング51の高さ方向中間に配置された棒状磁石10の一端23側に落下する。すると、粉粒体Gは、各棒状磁石10の、カバー40の斜面47,47を介して、カバー40の吸着面49,49側へと案内される。そして、カバー40内に挿入された棒状磁石10の磁力によって、図5Bや図8Aに示すように、カバー40の斜面47,47の表側や吸着面49,49の表側に、粉粒体Gに含まれる金属片等の磁性異物Mが吸着される。すなわち、磁性異物Mは、棒状磁石10の、ガイド部28を構成する一対の斜面27,27の表側や、吸着部30を構成する一対の吸着面29,29
の表側に、カバー40の斜面47や吸着面49を介して間接的に吸着される(図8A参照)。
In the above state, when the granular material G is introduced from the inlet 53 above the casing, the granular material G is disposed above the casing via a plurality of guide plates 65 as shown in FIGS. 5B and 8A. The rod-shaped magnet 10 is dropped to one end 23 side or passes between the rod-shaped magnets 10 and 10 disposed above the casing, and the rod-shaped magnet 10 disposed at the middle in the height direction of the casing 51 is disposed on the one end 23 side. Fall into. Then, the granular material G is guided to the attracting surfaces 49 and 49 side of the cover 40 through the inclined surfaces 47 and 47 of the cover 40 of each bar-shaped magnet 10. Then, due to the magnetic force of the rod-shaped magnet 10 inserted into the cover 40, the powder G is applied to the front side of the inclined surfaces 47, 47 of the cover 40 and the front side of the attracting surfaces 49, 49, as shown in FIG. 5B and FIG. Magnetic foreign matter M such as contained metal pieces is adsorbed. That is, the magnetic foreign matter M is a pair of attracting surfaces 29 and 29 constituting the attracting portion 30 and the front side of the pair of inclined surfaces 27 and 27 constituting the guide portion 28 of the bar magnet 10.
Is indirectly adsorbed via the inclined surface 47 and the adsorption surface 49 of the cover 40 (see FIG. 8A).

なお、カバー40を有しない構造の場合は、棒状磁石10の斜面27や吸着面29の表側に、磁性異物Mが直接吸着される。この実施形態では、磁性異物Mは、カバー40側の吸着面等の表側に吸着するが、以下の説明では便宜上、棒状磁石10側の吸着面等に吸着するものとして説明する。   In the case of a structure that does not have the cover 40, the magnetic foreign matter M is directly attracted to the inclined surface 27 of the bar-shaped magnet 10 and the front side of the attracting surface 29. In this embodiment, the magnetic foreign matter M is attracted to the front side such as the attracting surface on the cover 40 side, but in the following description, it will be explained as adsorbing to the attracting surface on the bar-shaped magnet 10 side for convenience.

そして、この棒状磁石10においては、図1や図2に示すように、粉粒体Gから磁性異物Mを除去すべく、粉粒体Gを、棒状磁石10の一端23側に向けて進行させた場合に、棒状磁石10のガイド部28によって、粉粒体Gを棒状磁石10の一端23側に滞留しにくくさせて、吸着部30へ向けてスムーズに案内することができると共に、吸着部30の一対の吸着面29,29が、互いに平行となるように所定長さで伸びているので、強磁場が発生する吸着面を、従来の断面涙型のバーマグネットの境界部Pのように線状ではなく(図8B参照)、棒状磁石10の軸方向に直交する方向に伸びる面状とすることができるため、強磁場が発生する領域の面積を広く確保することでき、その結果、粉粒体Gに含有される磁性異物Mを、しっかりと吸着することができ、磁性異物Mの吸着漏れを少なくして、粉粒体Gから磁性異物Mを効率よく除去することができる。   In the rod-shaped magnet 10, as shown in FIGS. 1 and 2, the particle G is advanced toward the one end 23 side of the rod-shaped magnet 10 in order to remove the magnetic foreign matter M from the particle G. In this case, the guide part 28 of the bar-shaped magnet 10 makes it difficult for the powder G to stay on the one end 23 side of the bar-shaped magnet 10, and can smoothly guide it toward the suction part 30. Since the pair of attracting surfaces 29, 29 extend in a predetermined length so as to be parallel to each other, the attracting surface on which a strong magnetic field is generated is lined like a boundary portion P of a conventional cross-sectional tear bar magnet. (See FIG. 8B), it can be a planar shape extending in a direction orthogonal to the axial direction of the rod-shaped magnet 10, so that a large area of a region where a strong magnetic field is generated can be secured. Firmly remove magnetic foreign matter M contained in body G Can be adsorbed, with less suction leakage magnetic foreign matter M, it is possible to remove efficiently the magnetic foreign object M from granules G.

また、この除去装置50においては、図5Bに示すように、棒状磁石10は、その軸方向に直交する断面で見たときに、吸着部30の一端側に、磁性異物Mを吸着部30へ案内するガイド部28を有していると共に、所定隙間を空けて平行に、かつ、一端23側を粉粒体Gの進行方向に向けた状態で、ケーシング51内に複数並列して配置されているので、導入口53から導入される粉粒体Gを、棒状磁石10の一端23側に滞留しにくくさせて、各棒状磁石10の吸着部30へ向けてスムーズに案内することができる。更に、各棒状磁石10の吸着部30は、互いに平行となるように所定長さで伸びる一対の吸着面29,29を有しているので、強磁場が発生する吸着面を、従来の断面涙型のバーマグネットの境界部Pのように線状ではなく、棒状磁石10の軸方向にC直交する方向に伸びる面状とすることができるため、強磁場が発生する領域の面積を広く確保することでき、隣接する棒状磁石10,10の吸着面29,29どうしの隙間に入り込む、粉粒体Gに含有される磁性異物Mを、しっかりと吸着することができ、磁性異物Mの吸着漏れを少なくして、粉粒体Gから磁性異物Mを効率よく除去することができる。   Further, in this removing device 50, as shown in FIG. 5B, the rod-shaped magnet 10 has a magnetic foreign substance M applied to the suction portion 30 on one end side of the suction portion 30 when viewed in a cross section orthogonal to the axial direction. A plurality of guide portions 28 are arranged in parallel in the casing 51 with a predetermined gap in parallel and with one end 23 facing the traveling direction of the granular material G. Therefore, the granular material G introduced from the inlet 53 can be smoothly guided toward the attracting portion 30 of each bar-shaped magnet 10 by making it difficult to stay on the one end 23 side of the bar-shaped magnet 10. Further, the attracting portion 30 of each bar magnet 10 has a pair of attracting surfaces 29 and 29 extending in a predetermined length so as to be parallel to each other. Since it is not linear like the boundary portion P of the bar magnet of the mold, but can be a planar shape extending in a direction perpendicular to the axial direction of the bar magnet 10, a large area of the region where the strong magnetic field is generated is ensured. It is possible to firmly adsorb the magnetic foreign matter M contained in the granular material G entering the gap between the attracting surfaces 29 and 29 of the adjacent bar-shaped magnets 10 and 10, and to prevent the magnetic foreign matter M from being leaked. The magnetic foreign matter M can be efficiently removed from the granular material G with less.

なお、ケーシング上方に配置された棒状磁石10や、ケーシング中間に配置された棒状磁石10を通過した粉粒体Gは、更に、ケーシング下方に配置された棒状磁石10の一端23側に落下して、上述したように、棒状磁石10の斜面27により吸着面29側へと案内される(図5B参照)。そのため、ケーシング上方やケーシング中間に配置された棒状磁石10によっても除去しきれなかった磁性異物Mを、ケーシング下方の棒状磁石10によって吸着除去することができる。このように、この実施形態では、ケーシング51の幅方向に沿って並列して配置された複数の棒状磁石10が、ケーシング51の高さ方向に複数段で配列されているので、磁性異物Mの吸着漏れをより確実に防止することができる。   Note that the rod-shaped magnet 10 disposed above the casing and the granular material G that has passed through the rod-shaped magnet 10 disposed in the middle of the casing further drop to the one end 23 side of the rod-shaped magnet 10 disposed below the casing. As described above, the rod-like magnet 10 is guided toward the attracting surface 29 by the inclined surface 27 (see FIG. 5B). Therefore, the magnetic foreign matter M that could not be removed even by the rod-shaped magnet 10 disposed above or in the middle of the casing can be removed by adsorption by the rod-shaped magnet 10 below the casing. Thus, in this embodiment, since the several rod-shaped magnet 10 arrange | positioned in parallel along the width direction of the casing 51 is arranged in multiple steps in the height direction of the casing 51, Adsorption leakage can be prevented more reliably.

また、この実施形態においては、図3に示すように、棒状磁石10は、複数の磁石20を軸方向に連結して形成されており、棒状磁石10を構成する各磁石20の接合面33は同じ極どうしとされて、板状のヨーク39を介して接合されている。そのため、磁力が強く作用する範囲(磁力が集中するヨーク39を通過する範囲)を、図3に示すように、棒状磁石10の軸方向に増大させることができる、磁性異物Mが吸着部30に吸着されずに、素通りすることを抑制して、磁性異物Mの吸着漏れを効果的に防止することができる。   Further, in this embodiment, as shown in FIG. 3, the rod-shaped magnet 10 is formed by connecting a plurality of magnets 20 in the axial direction, and the joining surface 33 of each magnet 20 constituting the rod-shaped magnet 10 is The same poles are joined together via a plate-like yoke 39. Therefore, as shown in FIG. 3, the magnetic foreign matter M can be increased in the attracting portion 30 so that the range where the magnetic force acts strongly (the range passing through the yoke 39 where the magnetic force concentrates) can be increased in the axial direction of the bar magnet 10. It is possible to effectively prevent the magnetic foreign matter M from being leaked by being prevented from passing through without being attracted.

更に、この実施形態においては、棒状磁石10を構成する各磁石20の、各接合面33
は、棒状磁石10の軸方向に対して、所定角度で傾いて互いに平行に配置されている。そのため、棒状磁石10の軸方向に直交する方向に、磁場が強い箇所が存在することになり(磁石20が棒状磁石10の軸方向に積層されている場合、磁力の密度は、ヨーク39が配置された接合面付近が最も高くなり、磁石20の厚さ方向中間部が最も低くなる)、磁性異物Mが、磁場が弱い箇所を素通りしても、磁場が強い箇所によって吸着させることができ、磁性異物Mの吸着漏れをより効果的に防止することができる。
Furthermore, in this embodiment, each joint surface 33 of each magnet 20 which comprises the rod-shaped magnet 10 is shown.
Are arranged at a predetermined angle with respect to the axial direction of the bar-shaped magnet 10 and arranged in parallel to each other. Therefore, there is a portion where the magnetic field is strong in a direction orthogonal to the axial direction of the rod-shaped magnet 10 (when the magnet 20 is laminated in the axial direction of the rod-shaped magnet 10, the density of the magnetic force is arranged by the yoke 39. And the magnetic foreign material M can be adsorbed by a strong magnetic field even if it passes through a weak magnetic field, Adsorption leakage of the magnetic foreign matter M can be prevented more effectively.

図9及び図10には、本発明に係る磁性異物除去装置の、第2実施形態が示されている。なお、前記実施形態と実質的に同一部分には同符号を付してその説明を省略する。   9 and 10 show a second embodiment of the magnetic foreign matter removing apparatus according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

この実施形態の磁性異物除去装置50A(以下、「除去装置50A」ともいう)は、ケーシング51の中央に、図示しない駆動手段により所定方向に回動可能とされた回動軸67を有している。この回動軸67の外周には、その軸方向に沿って、棒状磁石10が複数配置されており(ここでは棒状磁石10が回動軸67の軸方向に4段で配置)、更にこれらの棒状磁石10が、その一端23側を回動軸67の回動方向に向けて(すなわち、粉粒体又は流体の進行方向に向けて)、回動軸67に対して放射状に連結されている。この実施形態では、回動軸67の外周に、周方向に均等な間隔を空けて、4つの棒状磁石10が放射状に配列されている。そして、各棒状磁石10は、前記回動軸67を介して、ケーシング51の内周において回動可能とされている。なお、各棒状磁石10は、前記実施形態と同様に、複数の磁石20から構成されている。   A magnetic foreign matter removing apparatus 50A (hereinafter, also referred to as “removing apparatus 50A”) of this embodiment has a rotating shaft 67 that can be rotated in a predetermined direction by a driving means (not shown) at the center of the casing 51. Yes. A plurality of rod-shaped magnets 10 are arranged on the outer periphery of the rotating shaft 67 along the axial direction (here, the rod-shaped magnets 10 are arranged in four stages in the axial direction of the rotating shaft 67). The rod-shaped magnet 10 is radially connected to the rotating shaft 67 with one end 23 side thereof facing the rotating direction of the rotating shaft 67 (that is, toward the traveling direction of the powder or fluid). . In this embodiment, four rod-shaped magnets 10 are radially arranged on the outer periphery of the rotating shaft 67 with an equal interval in the circumferential direction. Each bar-shaped magnet 10 can be rotated on the inner periphery of the casing 51 via the rotation shaft 67. In addition, each rod-shaped magnet 10 is comprised from the some magnet 20 similarly to the said embodiment.

そして、この実施形態においては、棒状磁石10は回動軸67に連結されており、ケーシング51の内周において回動可能とされているので、例えば、粉粒体が凝集しているような場合であっても、棒状磁石10の回動により攪拌されて分散するため、各棒状磁石10による磁性異物の吸着効率を高めることができる。   And in this embodiment, since the rod-shaped magnet 10 is connected with the rotating shaft 67, and can be rotated in the inner periphery of the casing 51, for example, when a granular material aggregates Even so, since the bar-shaped magnets 10 are agitated and dispersed by the rotation of the bar-shaped magnets 10, it is possible to increase the adsorption efficiency of the magnetic foreign matter by the bar-shaped magnets 10.

図11には、本発明に係る磁性異物除去装置の、第3実施形態が示されている。なお、前記実施形態と実質的に同一部分には同符号を付してその説明を省略する。   FIG. 11 shows a third embodiment of the magnetic foreign matter removing apparatus according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

図11に示すように、この実施形態の磁性異物除去装置50B(以下、「除去装置50B」ともいう)は、ケーシング51の周方向の所定箇所に、粉粒体又は流体を導入する導入口53Aが設けられており、ケーシング51の、導入口53Aとは周方向に対向する箇所に、金属片等の磁性異物Mを吸着除去した後の流体等を排出するための、排出口55Aが設けられている。また、棒状磁石10は、その一端23側を、導入口53Aに向けて、千鳥状をなすように複数配置されている(図11参照)。   As shown in FIG. 11, the magnetic foreign matter removing device 50 </ b> B (hereinafter, also referred to as “removing device 50 </ b> B”) of this embodiment has an inlet 53 </ b> A that introduces a granular material or fluid into a predetermined location in the circumferential direction of the casing 51. A discharge port 55A is provided at a portion of the casing 51 facing the introduction port 53A in the circumferential direction to discharge the fluid after the magnetic foreign matter M such as a metal piece is adsorbed and removed. ing. Further, a plurality of rod-shaped magnets 10 are arranged in a zigzag shape with one end 23 side thereof directed toward the introduction port 53A (see FIG. 11).

この実施形態の除去装置50Bは、流体中に含まれた磁性異物を除去するのに適している。すなわち、導入口53Aから流体Fが導入されると、各棒状磁石10の吸着面29によって磁性異物Mが吸着除去されて、排出口55Aから排出されるので、流体Fから磁性異物を効率よく除去することができる。なお、この除去装置50Bは、粉粒体中の磁性異物を除去するのに用いてもよい。   The removal device 50B of this embodiment is suitable for removing magnetic foreign substances contained in a fluid. That is, when the fluid F is introduced from the introduction port 53A, the magnetic foreign matter M is attracted and removed by the attracting surface 29 of each rod-shaped magnet 10, and is discharged from the discharge port 55A. can do. In addition, you may use this removal apparatus 50B for removing the magnetic foreign material in a granular material.

なお、本発明は、上述した実施形態に限定されるものではなく、本発明の要旨の範囲内で、各種の変形実施形態が可能であり、そのような実施形態も本発明の範囲に含まれる。   It should be noted that the present invention is not limited to the above-described embodiment, and various modified embodiments are possible within the scope of the present invention, and such an embodiment is also included in the scope of the present invention. .

10,10A,10B,10C 棒状磁石
20 磁石
21 連結軸
23 一端
25 他端
27,27 斜面
28 ガイド部
29,29 吸着面
30 吸着部
31 曲面
31a 直交面
32 基端部
33 接合面
37 テーパ面
40 カバー
47,47 斜面
49,49 吸着面
50,50A,50B,50C 磁性異物除去装置(除去装置)
51 ケーシング
53,53A,53B 導入口
55,55A,55B 排出口
57 スライド壁部
59 支持板
65 ガイド板
67 回動軸
100 バーマグネット
110 ケーシング
120 上方開口
A 長軸
B 短軸
C 軸方向
G 粉粒体
M 磁性異物
P 境界部
10, 10A, 10B, 10C Bar-shaped magnet 20 Magnet 21 Connecting shaft 23 One end 25 Other end 27, 27 Slope 28 Guide portion 29, 29 Adsorbing surface 30 Adsorbing portion 31 Curved surface 31a Orthogonal surface 32 Base end portion 33 Joining surface 37 Tapered surface 40 Cover 47, 47 Slope 49, 49 Adsorption surface 50, 50A, 50B, 50C Magnetic foreign matter removing device (removing device)
51 Casing 53, 53A, 53B Introduction port 55, 55A, 55B Discharge port 57 Slide wall portion 59 Support plate 65 Guide plate 67 Rotating shaft 100 Bar magnet 110 Casing 120 Upper opening A Long axis B Short axis C Axial direction G Powder particles Body M Foreign matter P Boundary part

Claims (9)

磁性異物を含む粉粒体又は流体から、前記磁性異物を磁場によって吸着するための、所定長さで棒状に伸びる棒状磁石であって、
前記棒状磁石は、その軸方向に直交する断面で見たときに、互いに平行となるように所定長さで伸びる一対の吸着面を設けた吸着部と、該吸着部の一端側に設けられ、前記磁性異物を前記吸着部へ案内するガイド部とを有することを特徴とする棒状磁石。
A rod-like magnet extending in a rod shape with a predetermined length for adsorbing the magnetic foreign matter from a powder or fluid containing magnetic foreign matter by a magnetic field,
The rod-shaped magnet is provided on a suction part provided with a pair of suction surfaces extending in a predetermined length so as to be parallel to each other when viewed in a cross section perpendicular to the axial direction, and one end side of the suction part, A bar-shaped magnet having a guide portion for guiding the magnetic foreign matter to the attracting portion.
前記棒状磁石の外周に適合する形状をなし、非磁性材料からなるカバーを有しており、このカバー内に前記棒状磁石が挿脱可能とされている請求項1記載の棒状磁石。   The rod-shaped magnet according to claim 1, wherein the rod-shaped magnet has a shape that fits the outer periphery of the rod-shaped magnet and has a cover made of a non-magnetic material, and the rod-shaped magnet can be inserted into and removed from the cover. 前記棒状磁石は、複数の磁石を軸方向に連結して形成されており、前記棒状磁石を構成する各磁石の接合面は、同じ極どうしとされている、請求項1又は2記載の棒状磁石。   The rod-shaped magnet according to claim 1 or 2, wherein the rod-shaped magnet is formed by connecting a plurality of magnets in the axial direction, and the joint surfaces of the magnets constituting the rod-shaped magnet are the same poles. . 前記棒状磁石を構成する各磁石の、各接合面は、前記棒状磁石の軸方向に対して、所定角度で傾いて互いに平行とされている請求項3記載の棒状磁石。   The bar-shaped magnet according to claim 3, wherein the joint surfaces of the magnets constituting the bar-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the bar-shaped magnet and are parallel to each other. 磁性異物を含む粉粒体又は流体から、前記磁性異物を磁場によって吸着除去する、磁性異物除去装置であって、
前記粉粒体又は流体を導入する導入口、及び、前記粉粒体又は流体を排出する排出口を有するケーシングと、
前記ケーシング内に配置され、所定長さで棒状に伸びる複数の棒状磁石とを有し、
前記棒状磁石は、その軸方向に直交する断面で見たときに、互いに平行となるように所定長さで伸びる一対の吸着面を設けた吸着部と、該吸着部の一端側に設けられ、前記磁性異物を前記吸着部へ案内するガイド部とを有しており、
前記棒状磁石は、所定隙間を空けて平行に、かつ、前記一端側を前記粉粒体又は流体の進行方向に向けた状態で、前記ケーシング内に複数並列して配置されていることを特徴とする、磁性異物除去装置。
A magnetic foreign matter removing device that removes the magnetic foreign matter by a magnetic field from a powder or fluid containing magnetic foreign matter,
A casing having an inlet for introducing the powder or fluid, and an outlet for discharging the powder or fluid;
A plurality of rod-shaped magnets arranged in the casing and extending in a rod shape with a predetermined length;
The rod-shaped magnet is provided on a suction part provided with a pair of suction surfaces extending in a predetermined length so as to be parallel to each other when viewed in a cross section perpendicular to the axial direction, and one end side of the suction part, A guide portion for guiding the magnetic foreign matter to the attracting portion;
A plurality of the bar-shaped magnets are arranged in parallel in the casing with a predetermined gap in parallel and with the one end side directed in the traveling direction of the powder or fluid. A magnetic foreign substance removing device.
前記ケーシング内には、非磁性材料からなり、前記棒状磁石の外周に適合して被せられる複数のカバーが前記棒状磁石の配列と整合するように配置されており、
前記棒状磁石は、対応する前記カバー内に挿脱可能とされている請求項5記載の磁性異物除去装置。
In the casing, a plurality of covers made of a non-magnetic material and fitted on the outer periphery of the bar magnet are arranged so as to be aligned with the arrangement of the bar magnets,
The magnetic foreign matter removing apparatus according to claim 5, wherein the rod-like magnet is insertable into and removable from the corresponding cover.
前記棒状磁石は、複数の磁石を軸方向に連結して形成されており、前記棒状磁石を構成する各磁石の接合面は、同じ極どうしとされている、請求項5又は6記載の磁性異物除去装置。   The magnetic foreign object according to claim 5 or 6, wherein the rod-shaped magnet is formed by connecting a plurality of magnets in the axial direction, and the joint surfaces of the magnets constituting the rod-shaped magnet are the same poles. Removal device. 前記棒状磁石を構成する各磁石の、各接合面は、前記棒状磁石の軸方向に対して、所定角度で傾いて互いに平行とされている請求項7記載の磁性異物除去装置。   The magnetic foreign matter removing apparatus according to claim 7, wherein each joint surface of each magnet constituting the rod-shaped magnet is inclined at a predetermined angle with respect to the axial direction of the rod-shaped magnet and parallel to each other. 前記棒状磁石は、前記一端側を回動方向に向けて、回動軸に対して放射状に連結されており、前記ケーシングの内周において回動可能とされている請求項5〜8のいずれか1つに記載の磁性異物除去装置。   The rod-shaped magnet is radially connected to a rotation shaft with the one end side facing the rotation direction, and is rotatable on the inner periphery of the casing. The magnetic foreign material removal apparatus as described in one.
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