JPH0538695A - Electromagnetic holder for thin plate - Google Patents
Electromagnetic holder for thin plateInfo
- Publication number
- JPH0538695A JPH0538695A JP21481891A JP21481891A JPH0538695A JP H0538695 A JPH0538695 A JP H0538695A JP 21481891 A JP21481891 A JP 21481891A JP 21481891 A JP21481891 A JP 21481891A JP H0538695 A JPH0538695 A JP H0538695A
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- JP
- Japan
- Prior art keywords
- electromagnetic
- plate
- magnetic
- holder
- thin plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、鉄板その他の磁性材
料板材を吸着保持する電磁ホルダーに係り、特に板厚の
薄い板材、即ち薄板の吸着保持に好適な電磁ホルダーに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic holder for attracting and holding an iron plate or other magnetic material plate material, and more particularly to an electromagnetic holder suitable for attracting and holding a thin plate material, that is, a thin plate.
【０００２】[0002]
【従来の技術】従来、鉄板その他の磁性材料板材（その
加工部品も含む）を吸着して搬送する手段として、磁力
を利用した電磁ホルダーが知られている。2. Description of the Related Art Heretofore, an electromagnetic holder utilizing magnetic force has been known as a means for adsorbing and conveying an iron plate or other magnetic material plate material (including processed parts thereof).
【０００３】この電磁ホルダーは、電磁石によって構成
されているもので、電磁コイルと、該電磁コイルで励磁
される磁極を備えている。電磁ホルダーの吸着面は、通
常平面とされ、励磁された磁極のＮ極とＳ極が、吸着面
内に並列的に、或いは同心円状に配置されている。This electromagnetic holder is composed of an electromagnet, and has an electromagnetic coil and a magnetic pole excited by the electromagnetic coil. The attraction surface of the electromagnetic holder is usually a flat surface, and the N poles and S poles of the excited magnetic poles are arranged in parallel or concentrically in the attraction surface.
【０００４】電磁コイルに通電して、磁極を励磁した状
態で吸着面に、吸着の対象物である鉄板その他の磁性材
料板材が当接すると、Ｎ極から発した磁気が鉄板その他
の磁性材料板材を通してＳ極に至るようになり、対象物
は磁気的に吸着される。又、電磁コイルの通電を遮断す
ると磁気が消失して、吸着力が無くなる結果、吸着した
鉄板その他の磁性材料板材は脱着される。When an iron plate or other magnetic material plate material, which is an object to be attracted, comes into contact with the attracting surface while the magnetic coil is energized and the magnetic poles are excited, the magnetism generated from the N pole is iron plate or other magnetic material sheet material. To the south pole, and the object is magnetically adsorbed. When the electromagnetic coil is de-energized, the magnetism disappears and the attractive force disappears. As a result, the attracted iron plate or other magnetic material plate material is removed.
【０００５】[0005]
【発明が解決しようとする課題】前記のような電磁ホル
ダーで、積重ねた薄い鉄板その他の磁性材料板材を一枚
ずつ吸着、保持しようとすると、磁極から発した磁気
が、１枚目の板材を透過して、２枚目以降の板材にも作
用するため、薄い鉄板その他の磁性材料板材を１枚ずつ
吸着して搬送することが難しい問題点があった。薄い鉄
板その他の磁性材料板材を吸着の対象物とした場合、吸
着保持に必要な磁気を電磁ホルダーの磁極から発生させ
ると、磁気が１枚目の板材を抜けて、２枚目以降の板材
内も通過するようになるためである。When it is attempted to attract and hold the stacked thin iron plates and other magnetic material plate materials one by one with the electromagnetic holder as described above, the magnetism generated from the magnetic poles causes the first plate material to move. Since it permeates and acts on the second and subsequent plate materials, there is a problem that it is difficult to adsorb and transport thin iron plates and other magnetic material plate materials one by one. When a thin iron plate or other magnetic material plate material is used as the object of attraction, if the magnetism necessary for attraction and holding is generated from the magnetic poles of the electromagnetic holder, the magnetism will escape from the first sheet material and This is because it will also pass through.
【０００６】[0006]
【課題を解決する為の手段】この発明は、上記のような
問題点に鑑みてなされたもので、薄い鉄板その他の磁性
材料板材を１枚ずつ吸着保持できる電磁ホルダーを提供
することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an electromagnetic holder capable of attracting and holding thin iron plates and other magnetic material plates one by one. There is.
【０００７】このような目的を達成するこの発明の電磁
ホルダーは、電磁コイルと、該電磁コイルで励磁される
磁極を備えた電磁ホルダーにおいて、前記磁極が吸着面
内で、微間隙を介して対向させてあることを特徴として
いる。The electromagnetic holder of the present invention which achieves the above object is an electromagnetic holder provided with an electromagnetic coil and a magnetic pole excited by the electromagnetic coil, wherein the magnetic poles are opposed to each other within a suction surface with a minute gap. It is characterized by being done.
【０００８】前記微間隙は、例えば０．８mmの厚さの鉄
板用として、０．７mmの間隙とした。吸着対象となる薄
板の厚さ以下の間隙を保つようにすると、ほぼ目的を達
成することができる。The fine gap is 0.7 mm for an iron plate having a thickness of 0.8 mm, for example. By keeping the gap equal to or smaller than the thickness of the thin plate to be adsorbed, the purpose can be almost achieved.
【０００９】この微間隙の配置形状は、直線に沿っても
良いが、星形状、鋸歯状その他の形状の曲線に沿って、
吸着面内に設けるようにすると、吸着面内の微間隙の長
さを長くすることができ、全体として吸着力の増大を図
ることができる。The fine gaps may be arranged along a straight line, but along a curved line of a star shape, a sawtooth shape or the like,
If it is provided in the suction surface, the length of the fine gap in the suction surface can be increased, and the suction force can be increased as a whole.
【００１０】電磁ホルダーを構成する電磁コイルは少な
くとも１個備えていれば良いが、複数個の電磁コイルと
することもできる。複数個の電磁コイルとした場合、１
個の電磁コイルを薄板の吸着、脱着を検出するためのセ
ンサーとしても良い。It is sufficient that at least one electromagnetic coil constitutes the electromagnetic holder, but a plurality of electromagnetic coils can be used. When using multiple electromagnetic coils, 1
The individual electromagnetic coils may be used as a sensor for detecting the adsorption and desorption of the thin plate.
【００１１】更に、前記のように構成した薄板用電磁ホ
ルダーの、吸着面内に、エアーノズルを開口させて、吸
着しようとする鉄板その他の磁性材料板材の表面を、吸
着直前にエアーノズルから吹き出すエアーで清浄化でき
るようにすることもできる。Further, the air nozzle of the thin plate electromagnetic holder constructed as described above is opened with an air nozzle, and the surface of the iron plate or other magnetic material plate material to be attracted is blown out from the air nozzle immediately before the attraction. It can also be made air-cleanable.
【００１２】[0012]
【作用】前記のように構成したこの発明の薄板用電磁ホ
ルダーによれば、積重ねた薄い鉄板その他の磁性材料板
材を１枚ずつ吸着、保持することが可能になり、所望の
搬送を可能とすることができる。According to the thin plate electromagnetic holder of the present invention configured as described above, it becomes possible to attract and hold the stacked thin iron plates and other magnetic material plate materials one by one, thereby enabling desired transportation. be able to.
【００１３】吸着面内において、微間隙を介して対向さ
せた磁極から発した磁気を、１枚目の鉄板その他の磁性
材料板材内のみを通過させ、２枚目以降の板材に磁気を
作用させないようにできるためである。In the attraction surface, the magnetism generated from the magnetic poles opposed to each other with a minute gap passed through only the first iron plate and other magnetic material plate materials, and the magnetism is not applied to the second and subsequent plate materials. This is because it can be done.
【００１４】[0014]
【実施例】以下この発明の実施例を図を参照して説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１(a) 、(b) は、丸形の電磁ホルダー１
で、電磁コイル２と磁気コア３で構成されている。磁気
コア３は、鉄その他の磁性材料で構成されているもの
で、芯体３ａとカバー体３ｂとからなり、内部に電磁コ
イル２を、芯体３ａと同芯的に収容している。芯体３ａ
の一端には、星形の磁極板４が連結されている一方、カ
バー体３ｂの一端には、環状として、内縁を磁極板４と
相似形の星形に形成した磁極板５が連結されており、磁
極板４の外縁と磁極板５の外縁との間に、微間隙６
（０．７mm）を保って、吸着面７を構成した。1 (a) and 1 (b) show a round electromagnetic holder 1
Then, it is composed of the electromagnetic coil 2 and the magnetic core 3. The magnetic core 3 is made of a magnetic material such as iron and is composed of a core body 3a and a cover body 3b, and the electromagnetic coil 2 is housed inside the core body 3a concentrically. Core 3a
The star-shaped magnetic pole plate 4 is connected to one end of the cover body 3b, while the one end of the cover body 3b is connected to the magnetic pole plate 5 whose inner edge is formed in a star shape similar to the magnetic pole plate 4. Between the outer edge of the pole plate 4 and the outer edge of the pole plate 5.
(0.7 mm) was maintained to form the adsorption surface 7.
【００１６】図２は、上記実施例の電磁ホルダー１の作
用を説明する図である。(a) は実施例の磁極間に微間隙
を保った電磁ホルダーの場合であり、(b) は従来の電磁
ホルダーの場合で、磁極４ａ、５ａは、大きな間隔６ａ
を介して対向させている。FIG. 2 is a diagram for explaining the operation of the electromagnetic holder 1 of the above embodiment. (a) is the case of the electromagnetic holder in which a small gap is maintained between the magnetic poles of the embodiment, (b) is the case of the conventional electromagnetic holder, and the magnetic poles 4a and 5a are large gaps 6a.
Are facing each other.
【００１７】実施例の電磁ホルダー１の吸着面７を、積
重ねた薄い鉄板その他の磁性材料板材８、８の１枚目の
板材表面に当接させ、電磁コイル２に通電すると、磁極
板４、５が励磁されて、一方の磁極（Ｎ極）から出た磁
気９が他方の磁極（Ｓ極）に流れる。このときの磁気９
の磁束密度を１枚の板材８内で飽和しない程度とすれ
ば、大部分の磁気が１枚目の板材８内を通るようにする
ことができ、２枚目以下の板材８に磁気を作用させなく
できる。この結果、１枚の板材８のみを吸着、保持する
ことが可能である。When the attracting surface 7 of the electromagnetic holder 1 of the embodiment is brought into contact with the surface of the first plate member of the stacked thin iron plates or other magnetic material plate members 8, and the electromagnetic coil 2 is energized, the magnetic pole plate 4, 5 is excited, and the magnetism 9 emitted from one magnetic pole (N pole) flows to the other magnetic pole (S pole). Magnetic at this time 9
If the magnetic flux density of is not saturated in one plate material 8, most of the magnetism can pass through the first plate material 8, and the magnetism acts on the second and subsequent plate materials 8. You can do it. As a result, it is possible to adsorb and hold only one plate member 8.
【００１８】一方、(b) に示した従来の電磁ホルダーで
は、磁極４ａ、５ａの間隔６ａが大きいので、吸着面７
ａを１枚目の板材８の表面に当接させて、電磁コイルに
通電すると、一方の磁極（Ｎ極）から出た磁気９は、数
枚の板材８、８内を通って他の磁極（Ｓ極）に至るよう
になっていた。従って、１枚目の板材８のみを吸着、保
持することは不可能で、複数枚の板材８、８を同時に吸
着、保持してしまう結果となっていたものである。On the other hand, in the conventional electromagnetic holder shown in (b), since the gap 6a between the magnetic poles 4a and 5a is large, the attracting surface 7
When a is brought into contact with the surface of the first plate member 8 and the electromagnetic coil is energized, the magnetism 9 emitted from one magnetic pole (N pole) passes through several plate members 8, 8 and the other magnetic pole. It was supposed to reach (S pole). Therefore, it is impossible to adsorb and hold only the first plate member 8, and a plurality of plate members 8 and 8 are adsorbed and held at the same time.
【００１９】図３(a) 、(b) は、角形の電磁ホルダー１
１の実施例を示したものである。電磁コイル１２と、該
電磁コイル１２を内部に収容できるようにした磁極板１
４、１５からなり、両磁極板１４、１５は電磁コイル１
２の一側で、鉄製の連結部材１６で一体的に連結されて
いる。磁極板１４、１５による吸着面１７は、図(b)に
示したように、一方の磁極板１４の鋸歯状の端縁１４ａ
と、他方の磁極板１５の鋸歯状の端縁１５ａが、微間隙
１８（０．７mm）を介して対向させてある。3 (a) and 3 (b) show a rectangular electromagnetic holder 1
1 shows the first embodiment. Electromagnetic coil 12 and magnetic pole plate 1 capable of containing the electromagnetic coil 12 therein
4 and 15, both magnetic pole plates 14 and 15 are electromagnetic coils 1.
One side of 2 is integrally connected by a connecting member 16 made of iron. The attracting surface 17 formed by the magnetic pole plates 14 and 15 has a serrated edge 14a of one magnetic pole plate 14 as shown in FIG.
And the saw-toothed edge 15a of the other magnetic pole plate 15 are opposed to each other with a minute gap 18 (0.7 mm) in between.
【００２０】この実施例の電磁ホルダー１１によって
も、微間隙１８を介して磁極板１４、１５を対向させて
て吸着面１７を構成したので、薄い鉄板その他の磁性材
料板材を１枚ずつ吸着、保持することが可能である。Also in the electromagnetic holder 11 of this embodiment, the magnetic pole plates 14 and 15 are opposed to each other via the minute gap 18 to form the attracting surface 17, so that thin iron plates and other magnetic material plate materials are attracted one by one, It is possible to hold.
【００２１】以上の実施例では、０．８mmの厚さの鉄板
に対して、微間隙６、１８を０．７mmに設定して、何れ
の場合も、積重ねた鉄板を１枚ずつ吸着、保持すること
ができた。微間隙６、１８の間隔は対象物の板材の厚さ
を考慮して設定すれば良く、対象物の板厚をｔ、微間隙
の間隔をｄとして、ｄ≦ｔの関係とすれば、目的を達成
すると認められる。In the above embodiments, the fine gaps 6 and 18 are set to 0.7 mm for an iron plate having a thickness of 0.8 mm, and in each case, the stacked iron plates are sucked and held one by one. We were able to. The interval between the fine gaps 6 and 18 may be set in consideration of the thickness of the plate material of the object. If the relation is d ≦ t, where t is the plate thickness of the object and d is the interval of the minute gaps, the purpose is Is recognized to achieve.
【００２２】電磁コイル２、１２は、基本的には１個の
電磁コイルで良いが、図４のように複数個で構成しても
良い。電磁コイルを複数個とした場合、１個の電磁コイ
ルは、吸着面に対して、吸着の対象物である磁性体の吸
着、脱着を検出するセンサーとすることもできる。磁性
体の吸着、脱着によって、電磁コイルのインダクタンス
が変化し、インダクタンス変化を電流変化などで検出で
きるからである。尚、１個の電磁コイルの場合も、検出
電流として高周波電流を、直流の励磁電流に重畳するよ
うにすれば、高周波電流の監視によって、対象物の吸
着、脱着を検出することが可能である。The electromagnetic coils 2 and 12 may basically be one electromagnetic coil, but may be composed of a plurality of coils as shown in FIG. When a plurality of electromagnetic coils are used, one electromagnetic coil can be used as a sensor for detecting the adsorption and desorption of the magnetic substance that is the object of adsorption on the adsorption surface. This is because the inductance of the electromagnetic coil changes due to the adsorption and desorption of the magnetic substance, and the inductance change can be detected by a current change or the like. Even in the case of one electromagnetic coil, if a high frequency current is superposed on a direct current exciting current as a detection current, it is possible to detect adsorption and desorption of an object by monitoring the high frequency current. ..
【００２３】吸着面の鉄板その他の磁性材料板材を吸着
した後、励磁電流を遮断して、脱着を図ろうとすると、
吸着した板材および磁極に残留磁気が残り、完全な脱着
を図れないことがある。After the iron plate or other magnetic material plate material on the attracting surface is attracted, the exciting current is cut off to attempt desorption.
Residual magnetism may remain on the attracted plate material and magnetic pole, and complete desorption may not be achieved.
【００２４】このような現象には、この発明者の出願に
係る発明である、電磁石の制御方法（特願平３−７８４
２８号）が有効である。即ち、図５がその制御方法にお
ける電磁コイルの電流波形であって、Ｐ2 、Ｐ3 の励磁
期間の後、Ｐ4 で励磁電流の遮断を行う。然る後、Ｐ5
で示されたタイムインターバルの期間を経た後、Ｐ6 の
消磁電流を電磁コイルに流すようにする。消磁電流とし
ては交流および／または直流の電流で行う種々の方法が
ある。図において(a) は交流の減衰電流の場合であり、
(b) 、(c) 、(d) は直流のパルス電流の場合である。ま
た、(e) は直流のパルス電流を流した後、交流の減衰電
流を流した場合である。This phenomenon is caused by the method of controlling the electromagnet, which is the invention of the present application (Japanese Patent Application No. 3-784).
No. 28) is effective. That is, FIG. 5 shows a current waveform of the electromagnetic coil in the control method, and the exciting current is cut off at P 4 after the exciting period of P 2 and P 3 . After that, P 5
After the time interval indicated by, the degaussing current of P 6 is made to flow through the electromagnetic coil. As the degaussing current, there are various methods of using an alternating current and / or a direct current. In the figure, (a) is the case of alternating damping current,
(b), (c) and (d) are the case of DC pulse current. In addition, (e) is the case where the alternating pulse current is passed after the direct current pulse current is passed.
【００２５】このようにＰ5 のタイムインターバルをお
いて消磁電流を通電することによって、残留磁気の消磁
を信頼性高く行うことが可能で、確実な脱着を行うこと
ができる。By supplying the degaussing current at the time interval of P5 as described above, the demagnetization of the residual magnetism can be performed with high reliability, and the desorption can be surely performed.
【００２６】次に図６は、前記図１に示した実施例の変
形例である。即ち、磁気コア３を構成した芯体３ａの軸
に沿って、通気孔３１を形成し、通気孔３１の吸着面７
における開口部をエアーノズル３２としたものである。Next, FIG. 6 shows a modification of the embodiment shown in FIG. That is, the ventilation hole 31 is formed along the axis of the core body 3 a that constitutes the magnetic core 3, and the adsorption surface 7 of the ventilation hole 31 is formed.
The air nozzle 32 is used as the opening in the above.
【００２７】この実施例の電磁ホルダーを使用する場
合、吸着面７を鉄板その他の磁性材料板材に当接して吸
着を行う直前において、吸着面７と板材の間に狭い隙間
が形成された時に、前記通気孔３１を通して導いた加圧
エアーをエアーノズル３２から吹き出すようにする。When the electromagnetic holder of this embodiment is used, a narrow gap is formed between the attraction surface 7 and the plate material immediately before the attraction surface 7 is brought into contact with an iron plate or other magnetic material plate material to perform attraction. The pressurized air guided through the ventilation hole 31 is blown out from the air nozzle 32.
【００２８】このようにすることによって、鉄板その他
の磁性材料板材の表面に存在しているほこりなどの塵埃
を吹き飛ばすことができ、吸着、搬送直前の清浄化を行
うことが可能となる。By doing so, dust such as dust existing on the surface of the iron plate or other magnetic material plate material can be blown off, and it becomes possible to perform adsorption and cleaning immediately before transportation.
【００２９】[0029]
【発明の効果】以上に説明したように、この発明によれ
ば、吸着面内において磁極を微間隙を介して対向させて
電磁ホルダーを構成したので、薄い鉄板その他の磁性材
料板材を１枚ずつ確実に吸着できる効果がある。As described above, according to the present invention, since the magnetic holder is constituted by the magnetic poles facing each other with a minute gap in the attracting surface, thin iron plates and other magnetic material plate materials are provided one by one. It has the effect of being able to reliably adsorb.
【００３０】薄い鉄板その他の磁性材料板材が積重ねら
れた状態でも、最上層の１枚を確実に吸着し、２枚目以
下の板材を同時に吸着しないようにできる。Even when thin iron plates and other magnetic material plate materials are stacked, it is possible to securely adsorb the uppermost one sheet and prevent the second and subsequent sheet materials from being adsorbed at the same time.
【図１】この発明の実施例で、(a) は縦断面図、(b) は
底面図である。FIG. 1 is an embodiment of the present invention, (a) is a longitudinal sectional view, (b) is a bottom view.
【図２】同じく実施例の作用を説明する図で、(a) は実
施例の説明図、(b) は従来の電磁ホルダーの説明図であ
る。2A and 2B are diagrams for explaining the operation of the embodiment, FIG. 2A is an explanatory view of the embodiment, and FIG. 2B is an explanatory view of a conventional electromagnetic holder.
【図３】この発明の他の実施例で、(a) は縦断面図、
(b) は底面図である。FIG. 3 is another embodiment of the present invention, (a) is a longitudinal sectional view,
(b) is a bottom view.
【図４】この発明の別の実施例の縦断面図である。FIG. 4 is a vertical sectional view of another embodiment of the present invention.
【図５】この発明の種々の実施例の電磁コイルの制御方
法を表わす電流波形の図である。FIG. 5 is a current waveform diagram showing a method for controlling an electromagnetic coil according to various embodiments of the present invention.
【図６】この発明の更に別の実施例で、(a) は縦断面
図、(b) は底面図である。6A and 6B are still another embodiment of the present invention, wherein FIG. 6A is a vertical sectional view and FIG. 6B is a bottom view.
１、１１ 電磁ホルダー ２、１２ 電磁コイル ３ 磁気コア ３ａ 芯体 ３ｂ カバー ４、５、１４、１５ 磁極板 ６、１８ 微間隙 ７、１７ 吸着面 ８ 鉄板その他の磁性材料板材 ３１ 通気孔 ３２ エアーノズル 1, 11 Electromagnetic holder 2, 12 Electromagnetic coil 3 Magnetic core 3a Core body 3b Cover 4, 5, 14, 15 Magnetic pole plate 6, 18 Small gap 7, 17 Adsorption surface 8 Iron plate and other magnetic material plate material 31 Vent hole 32 Air nozzle
Claims (6)
る磁極を備えた電磁ホルダーにおいて、前記磁極が吸着
面内で、微間隙を介して対向させてあることを特徴とす
る薄板用電磁ホルダー1. An electromagnetic holder provided with an electromagnetic coil and a magnetic pole excited by the electromagnetic coil, wherein the magnetic poles are opposed to each other in a suction surface with a minute gap therebetween.
間隔とした請求項１記載の薄板用電磁ホルダー2. The electromagnetic holder for a thin plate according to claim 1, wherein the fine gap is set to be equal to or smaller than the thickness of the thin plate to be attracted.
その他の形状の曲線に沿って設けた請求項１記載の薄板
用電磁ホルダー3. The electromagnetic holder for a thin plate according to claim 1, wherein the minute gap is provided along the curved line of a star shape, a sawtooth shape or the like in the attraction surface.
項１記載の薄板用電磁ホルダー4. The electromagnetic holder for a thin plate according to claim 1, wherein the electromagnetic coil is one or plural.
イルは、薄板の吸着、脱着を検出する為のセンサーとし
た請求項４記載の薄板用電磁ホルダー5. The thin plate electromagnetic holder according to claim 4, wherein one of the plurality of electromagnetic coils is a sensor for detecting adsorption and desorption of the thin plate.
ある請求項１記載の薄板用電磁ホルダー6. An electromagnetic holder for thin plates according to claim 1, wherein an air nozzle is opened in the adsorption surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21481891A JPH0794116B2 (en) | 1991-07-31 | 1991-07-31 | Electromagnetic holder for thin plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21481891A JPH0794116B2 (en) | 1991-07-31 | 1991-07-31 | Electromagnetic holder for thin plates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0538695A true JPH0538695A (en) | 1993-02-19 |
| JPH0794116B2 JPH0794116B2 (en) | 1995-10-11 |
Family
ID=16662034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21481891A Expired - Fee Related JPH0794116B2 (en) | 1991-07-31 | 1991-07-31 | Electromagnetic holder for thin plates |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794116B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009056565A (en) * | 2007-08-31 | 2009-03-19 | National Univ Corp Shizuoka Univ | Magnetic probe, magnetic probe manufacturing method, and particle arranging device having the magnetic probe |
| CN101934937A (en) * | 2010-09-09 | 2011-01-05 | 江苏无锡建华机床附件集团有限公司 | Electro-permanent magnetic steel plate separator |
| JP2021120174A (en) * | 2020-01-31 | 2021-08-19 | 株式会社オータマ | Electromagnetic holder |
-
1991
- 1991-07-31 JP JP21481891A patent/JPH0794116B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009056565A (en) * | 2007-08-31 | 2009-03-19 | National Univ Corp Shizuoka Univ | Magnetic probe, magnetic probe manufacturing method, and particle arranging device having the magnetic probe |
| CN101934937A (en) * | 2010-09-09 | 2011-01-05 | 江苏无锡建华机床附件集团有限公司 | Electro-permanent magnetic steel plate separator |
| JP2021120174A (en) * | 2020-01-31 | 2021-08-19 | 株式会社オータマ | Electromagnetic holder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0794116B2 (en) | 1995-10-11 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |