JPH0596486A - Electromagnetic attracting device - Google Patents
Electromagnetic attracting deviceInfo
- Publication number
- JPH0596486A JPH0596486A JP28370691A JP28370691A JPH0596486A JP H0596486 A JPH0596486 A JP H0596486A JP 28370691 A JP28370691 A JP 28370691A JP 28370691 A JP28370691 A JP 28370691A JP H0596486 A JPH0596486 A JP H0596486A
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- Prior art keywords
- electromagnets
- magnetic
- attraction
- electromagnetic
- electromagnet
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、鉄板材料や、鉄製の
ビス、ナットその他の小物部品を磁気吸着して搬送する
のに使用する吸着用電磁石或いは加工の対象となる物品
を保持する電磁チャックとして利用可能な電磁吸着装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic chuck for holding an iron plate material, an iron magnet, an electromagnet for attraction used to convey an iron screw, a nut or other small parts by magnetic attraction, or an article to be processed. The present invention relates to an electromagnetic adsorption device that can be used as
【０００２】[0002]
【従来の技術】従来、鉄板材料や、鉄製のビス、ナット
その他の小物部品を磁気吸着して搬送する吸着用電磁石
が知られている。また、加工対象となる工作物を磁気吸
着により保持する電磁チャックが知られている。2. Description of the Related Art Heretofore, there has been known an electromagnet for attraction which magnetically attracts and conveys iron plate materials, iron screws, nuts and other small parts. In addition, there is known an electromagnetic chuck that holds a workpiece to be processed by magnetic attraction.
【０００３】これらの電磁吸着装置は、何れも一つの電
磁石で構成されており、磁性体（主として鉄）からなる
物品を磁力で吸着面に吸着保持し、搬送或いは加工中、
保持状態を継続し、搬送或いは加工終了後は、磁力を無
くして保持を解除するようにしている。Each of these electromagnetic adsorption devices is composed of one electromagnet, and an article made of a magnetic material (mainly iron) is adsorbed and held on an adsorption surface by magnetic force, and is conveyed or processed.
The holding state is continued, and after the conveyance or the processing is completed, the magnetic force is lost and the holding is released.
【０００４】[0004]
【発明が解決しようとする課題】前記のように、従来の
電磁吸着装置は、一つの電磁石で構成していたことを理
由として幾多の問題点があった。As described above, the conventional electromagnetic attraction device has many problems because it is composed of one electromagnet.
【０００５】例えば、薄板（０．８ｔ前後）を搬送する
為の吸着用電磁石では、強い吸着力を実現しようとして
も、薄板の磁気飽和によって十分な吸着力が得られなか
った。最大吸着力が２０kgm の吸着用電磁石で０．８ｔ
の鉄板を吸着した場合、約２kgm 程度の吸着力しか得ら
れない。For example, in an electromagnet for attraction for transporting a thin plate (about 0.8 t), even if an attempt is made to realize a strong attracting force, a sufficient magnetic attraction of the thin plate cannot be obtained. 0.8t with electromagnet for adsorption with maximum attraction force of 20kgm
When the above iron plate is adsorbed, only about 2 kgm of adsorption force can be obtained.
【０００６】また、積重ねた薄板から、吸着用電磁石で
薄板を一枚ずつ吸着搬送しようとしても、一枚目の薄板
を透過して、２枚目、３枚目…の薄板まで磁気が作用し
て吸着力を及ぼしてしまうので、一枚ずつの吸着が難し
かった。[0006] Further, even if it is attempted to attract and convey the stacked thin plates one by one by the electromagnet for adsorption, the magnetic force acts on the second thin plate, the third thin plate, etc. through the first thin plate. Since it exerts a suction force, it was difficult to suck one by one.
【０００７】ビス、ナット等の小物部品に対する吸着用
電磁石では、小物部品と電磁石の間で、点接触しか図れ
ないような場合に、十分な吸着力で確実に保持すること
が難しなかった。In the case of an electromagnet for adsorption to small parts such as screws and nuts, it was not difficult to reliably hold it with a sufficient adsorption force when only small point contact could be made between the small part and the electromagnet.
【０００８】次に、工作物を保持するようにした電磁チ
ャックでは、一つの電磁石を用いて、広い面積の吸着面
を構成するので構造が複雑化する問題点があった。工作
物の大きさが変化しても、吸着面の面積は一定であり、
合理的でないなどの欠点もあった。Next, in the electromagnetic chuck adapted to hold the workpiece, there is a problem that the structure becomes complicated because one electromagnet is used to form the attracting surface having a large area. Even if the size of the workpiece changes, the area of the suction surface is constant,
There were some drawbacks, such as being unreasonable.
【０００９】[0009]
【課題を解決する為の手段】この発明は前記のような問
題点に鑑みてなされたもので、薄板、小物部品などや、
加工の対象となる工作物の吸着保持に好適な電磁吸着装
置を提供することを目的としたものである。The present invention has been made in view of the above problems, and includes thin plates, small parts, and the like.
An object of the present invention is to provide an electromagnetic attracting device suitable for attracting and holding a workpiece to be processed.
【００１０】この目的を達成するこの発明の電磁吸着装
置は、磁性体からなる物品を磁力で吸着面に吸着保持す
るようにした電磁吸着装置において、前記吸着面内に複
数個の電磁石の各磁極端面が、吸着面と面一に配置して
あることを特徴としている。The electromagnetic attracting device of the present invention which achieves this object is an electromagnetic attracting device in which an article made of a magnetic material is attracted and held on the attracting surface by magnetic force, and each magnetic pole of a plurality of electromagnets is provided in the attracting surface. It is characterized in that the end face is arranged flush with the suction face.
【００１１】また、この発明は、前記複数個の電磁石の
夫々が独立して励磁および消磁制御が可能としてある電
磁吸着装置である。Further, the present invention is an electromagnetic attraction device in which each of the plurality of electromagnets can independently perform excitation and demagnetization control.
【００１２】[0012]
【作用】この発明の電磁吸着装置では、吸着面に複数個
の電磁石の磁極端面を配置したので、個々の電磁石の吸
着力を小さくしても、吸着面全体としては、必要な吸着
力を得ることができる。個々の電磁石の吸着力を小さく
することによって、磁気飽和を防ぎ、磁気の貫通も防ぐ
ことができる。従来、点接触しか図れなかった小物部品
も、複数個の電磁石と点接触することで必要な吸着力を
発揮させることができる。In the electromagnetic attracting device of the present invention, since the magnetic pole end faces of a plurality of electromagnets are arranged on the attracting surface, even if the attracting force of each electromagnet is reduced, the necessary attracting force is obtained as the entire attracting surface. be able to. By reducing the attraction force of each electromagnet, magnetic saturation can be prevented and magnetic penetration can be prevented. In the past, even small parts that were only capable of making point contact can exhibit the necessary attractive force by making point contact with a plurality of electromagnets.
【００１３】また、複数個の電磁石を、並設した構造で
あるので、構造の複雑化を避けて、所要の面積の吸着面
を得ることができる。Further, since a plurality of electromagnets are arranged side by side, it is possible to avoid the complication of the structure and obtain an attracting surface having a required area.
【００１４】複数個の電磁石を、夫々独立させて、励磁
および消磁制御が可能のようにすれば、必要な電磁石の
みを動作させることができるので、効率的な吸着および
脱着動作を行うことができる。If a plurality of electromagnets are independently controlled so that the excitation and demagnetization can be controlled, only the required electromagnets can be operated, so that efficient adsorption and desorption operations can be performed. .
【００１５】[0015]
【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.
【００１６】図１は、薄鉄板や、ビス、ナット等の小物
部品の吸着保持に好適な電磁吸着装置の実施例である。
有頂角筒状の非磁性体カバー１の内側に４個の電磁石２
ａ、２ｂ、２ｃ、２ｄが設置してある。各電磁石は有頂
円筒の中心軸上に芯軸を設けた構造でなる磁極３と、該
磁極３に装着した電磁コイル４で構成され、磁極３の端
面が非磁性体カバー１の開口端面と面一としてあり、前
記開口端面を電磁吸着装置としての吸着面５としたもの
である。FIG. 1 shows an embodiment of an electromagnetic attracting device suitable for attracting and holding thin iron plates and small parts such as screws and nuts.
Four electromagnets 2 are provided inside a non-magnetic cover 1 having a cylindrical shape with a square top.
a, 2b, 2c and 2d are installed. Each electromagnet is composed of a magnetic pole 3 having a structure in which a core axis is provided on the central axis of a top cylinder, and an electromagnetic coil 4 attached to the magnetic pole 3, and the end surface of the magnetic pole 3 is the opening end surface of the nonmagnetic cover 1. The surfaces are flush with each other, and the opening end surface is an attraction surface 5 as an electromagnetic attraction device.
【００１７】前記電磁石２ａ、２ｂ、２ｃ、２ｄの電磁
コイル４の通電方向は、隣接する電磁石間で極性が反転
するように選定し、図(a) に示したように、Ｎ極とＳ極
が交互に表われるようにする。The energizing directions of the electromagnetic coils 4 of the electromagnets 2a, 2b, 2c and 2d are selected so that the polarities are reversed between the adjacent electromagnets, and as shown in FIG. So that they appear alternately.
【００１８】上記実施例の電磁吸着装置を用いて薄板の
吸着保持を行う場合、各電磁石２ａ、２ｂ、２ｃ、２ｄ
は薄板における磁気飽和が起らないように励磁を行うと
良い。例えば、０．８ｔの薄鉄板では、１個の電磁石の
磁気吸着力を３kgm より大きくしても、磁気飽和によっ
て磁気吸着力の増大に比例する大きな吸着力を得ること
は困難であるので、各電磁石２ａ、２ｂ、２ｃ、２ｄの
磁気吸着力は、３kgm程度となるように電流値を設定す
る。When a thin plate is attracted and held by using the electromagnetic attraction device of the above-mentioned embodiment, each electromagnet 2a, 2b, 2c, 2d.
Is preferably excited so that magnetic saturation does not occur in the thin plate. For example, with a 0.8 t thin iron plate, even if the magnetic attraction force of one electromagnet is larger than 3 kgm, it is difficult to obtain a large attraction force proportional to the increase of the magnetic attraction force due to magnetic saturation. The current value is set so that the magnetic attraction force of the electromagnets 2a, 2b, 2c and 2d is about 3 kgm.
【００１９】このようにして、吸着面５を薄板に当接す
るようにして薄板の吸着保持を行うと良い。各電磁石と
薄板間では磁気飽和を少くしたので、磁気的ロスを無く
することができる。又、薄板に対する吸着力は、各電磁
石に設定した吸着力の、電磁石の個数（実施例の場合４
個）倍となるので、結果として大きな吸着力で確実に保
持することができる。In this way, it is advisable to hold the thin plate by suction so that the suction surface 5 contacts the thin plate. Since magnetic saturation is reduced between each electromagnet and the thin plate, magnetic loss can be eliminated. The attraction force for the thin plate is determined by the number of electromagnets (4 in the case of the embodiment) of the attraction force set for each electromagnet.
As a result, it can be securely held with a large suction force.
【００２０】又、薄板を多数枚、積重ねた状態で、上側
から一枚ずつ吸着保持して、搬送を行う場合、薄板での
磁気飽和を少くしたので、一枚目の薄板を貫通して、下
側の２枚目、３枚目…の薄板に作用する磁気は弱くな
る。従って、上側の一枚の薄板のみを確実に吸着保持す
ることができ、２枚目以下を同時に搬送するような現象
も無くすることができる。In the case where a large number of thin plates are stacked and adsorbed and held one by one from the upper side and conveyed, the magnetic saturation in the thin plates is reduced, so that the first thin plate is penetrated, The magnetism acting on the second, third, ... thin plates on the lower side is weakened. Therefore, only one thin plate on the upper side can be securely sucked and held, and the phenomenon of simultaneously conveying the second and subsequent sheets can be eliminated.
【００２１】次に、この実施例の電磁吸着装置で、ビ
ス、ナット等の小物部品を吸着保持する場合について説
明する。これらの小物部品では、吸着面５の平面に対向
する平面はほとんど形成されていない。従って小物部品
は吸着面に対して、数箇所、点接触状態となることが多
い。実施例の電磁吸着装置では、複数個の電磁石２ａ、
２ｂ、２ｃ、２ｄが設けてあるので、これらの電磁石の
うち、数個（２〜３個）の電磁石と点接触状態となるの
で、必要な吸着力を作用させて確実に保持することがで
きる。Next, the case where the electromagnetic attraction device of this embodiment attracts and holds small parts such as screws and nuts will be described. In these small parts, a flat surface facing the flat surface of the suction surface 5 is hardly formed. Therefore, small parts are often in point contact with the suction surface at several points. In the electromagnetic attraction device of the embodiment, a plurality of electromagnets 2a,
Since 2b, 2c, and 2d are provided, a few (2 to 3) electromagnets of these electromagnets are in point contact with each other, so that the necessary attraction force can be exerted to reliably hold the electromagnets. .
【００２２】尚、実施例では電磁石を４個設置したもの
について説明したが、電磁石の数はこれに限定されな
い。吸着しようとする対象物の大きさ、重量を考慮し
て、電磁石の個数、設置密度を決定すれば良いものであ
る。In the embodiment, four electromagnets are installed, but the number of electromagnets is not limited to this. It suffices to determine the number of electromagnets and the installation density in consideration of the size and weight of the object to be attracted.
【００２３】図２は、電磁チャックとして好適な実施例
の電磁吸着装置である。非磁性材ブロック６の上面に、
多数の丸穴７、７が形成してあり、各丸穴７内に、前記
実施例と同様の電磁石２ａ、２ｂ、２ｃ、…が装着して
あり、各電磁石の磁極の端面が非磁性材ブロック６の上
面と面一となるようにして、電磁吸着装置としての吸着
面８が構成してある。FIG. 2 shows an electromagnetic chucking device of a preferred embodiment as an electromagnetic chuck. On the upper surface of the non-magnetic material block 6,
A large number of round holes 7, 7 are formed, and the electromagnets 2a, 2b, 2c, ... Similar to those in the above-mentioned embodiment are mounted in each round hole 7, and the end faces of the magnetic poles of each electromagnet are made of a non-magnetic material. An adsorption surface 8 as an electromagnetic adsorption device is formed so as to be flush with the upper surface of the block 6.
【００２４】この実施例の場合も、各電磁石の電磁コイ
ルに通電する方向を、隣接する電磁石間で極性が反転す
るようにするもので、吸着面８には図(a) に示したよう
に、Ｎ極とＳ極が交互に表われるようにする。又、各電
磁石は、夫々が独立に励磁および消磁制御ができるよう
に、制御電源（図示していない）に対して、並列接続可
能としてある。Also in the case of this embodiment, the direction in which the electromagnetic coil of each electromagnet is energized is such that the polarities of the adjacent electromagnets are reversed, and as shown in FIG. , N poles and S poles appear alternately. Further, each electromagnet can be connected in parallel to a control power source (not shown) so that each electromagnet can independently perform excitation and demagnetization control.
【００２５】上記実施例の磁気吸着装置によれば、非磁
性材ブロック６の上面で工作物を磁気的にチャックする
ことができる。工作物は複数の電磁石によって吸着され
るので、チャック状態を安定することができる。工作物
の大きさに応じて、必要な電磁石だけを励磁することも
可能で、無駄を無くすることができる。According to the magnetic attraction device of the above embodiment, the workpiece can be magnetically chucked on the upper surface of the non-magnetic material block 6. Since the workpiece is attracted by the plurality of electromagnets, the chuck state can be stabilized. Depending on the size of the work piece, it is possible to excite only the necessary electromagnets, thus eliminating waste.
【００２６】以上、２つの実施例について説明した。こ
の発明の電磁吸着装置を吸着用電磁石として使用する場
合も、電磁チャックとして使用する場合も、電磁石の励
磁を遮断して吸着を解除する時、残留磁気が薄板や工作
物に残らないようにすることが、円滑な脱着や、その後
の作業上、必要である。The two embodiments have been described above. Whether the electromagnetic attraction device of the present invention is used as an attraction electromagnet or as an electromagnetic chuck, when the excitation of the electromagnet is cut off to release the attraction, residual magnetism is prevented from remaining on the thin plate or the workpiece. However, it is necessary for smooth desorption and subsequent work.
【００２７】この為には、この発明者の出願に係る発明
であって、電磁石の制御方法（特願平３−７８４２８
号）が有効である。即ち、図３がその制御方法を実施し
た場合の、各電磁石の電磁コイルの電流波形である。To this end, the invention according to the application of the present inventor, which is a method for controlling an electromagnet (Japanese Patent Application No. 3-78428).
No.) is effective. That is, FIG. 3 is a current waveform of the electromagnetic coil of each electromagnet when the control method is implemented.
【００２８】図示したように、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。[0028] As shown, after the excitation period P 2, P 3, performs interruption of the excitation current in the P 4. Thereafter, after a period of time interval indicated by P 5, to flow through degaussing current P 6 to 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, and (b),
(c) and (d) are the case of DC pulse current. Also,
(e) is the case where a direct current pulse current is applied and then an alternating attenuation current is applied.
【００２９】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、かつ短時間で行うことが可能で、円滑な
脱着を行うことができると共に、その後の作業も、残留
磁気による障害が無い状態で行うことができる。By supplying the degaussing current at the time interval of P 5 as described above, demagnetization of the residual magnetism can be performed with high reliability and in a short time, and smooth desorption can be performed. The subsequent work can also be performed without any obstacle due to residual magnetism.
【００３０】[0030]
【発明の効果】以上に説明したように、この発明によれ
ば、薄板、小物部品などや、加工の対象となる工作物の
吸着保持に好適な電磁吸着装置を提供できる効果があ
る。As described above, according to the present invention, there is an effect that it is possible to provide an electromagnetic attracting device suitable for attracting and holding thin plates, small parts and the like, and a workpiece to be machined.
【００３１】薄板を吸着する場合、磁気飽和を少くし、
また磁気の貫通も防ぐことができるので、必要、十分な
吸着力を得られると共に、一枚ずつの吸着保持が可能に
できる効果がある。When a thin plate is adsorbed, magnetic saturation is reduced,
Further, since it is possible to prevent penetration of magnetism, it is possible to obtain a necessary and sufficient attraction force, and it is possible to attract and hold one by one.
【００３２】小物部品を吸着する場合、吸着面に対して
点接触するような小物部品でも、数個の電磁石で吸着す
るので、確実な吸着保持ができる効果がある。In the case of adsorbing a small component, even a small component which is in point contact with the adsorption surface is adsorbed by several electromagnets, so that there is an effect that it can be securely adsorbed and held.
【００３３】工作物を吸着する場合には、工作物の大き
さに応じて、必要な電磁石を制御するようにできるの
で、無駄を無くすることができる。In the case of adsorbing the work piece, the necessary electromagnet can be controlled according to the size of the work piece, so that waste can be eliminated.
【００３４】更に、この発明の電磁吸着装置は、複数個
の電磁石を並設した単純な構造であるので、製作を容易
にできると共に、電磁石の制御が容易であり、特に、消
磁制御を短時間にできる効果がある。Further, since the electromagnetic attracting device of the present invention has a simple structure in which a plurality of electromagnets are arranged in parallel, it can be manufactured easily and the electromagnets can be easily controlled. There is an effect that can be.
【図１】この発明の第１実施例の図で、(a) は底面図、
(b) は縦断面図である。FIG. 1 is a diagram of a first embodiment of the present invention, (a) is a bottom view,
(b) is a vertical sectional view.
【図２】この発明の第２実施例の図で、(a) は一部を破
切した平面図、(b) は縦断面図である。FIG. 2 is a diagram of a second embodiment of the present invention, (a) is a partially cutaway plan view, and (b) is a longitudinal sectional view.
【図３】(a) 〜(e) はこの発明の実施例の電磁コイルに
対する電流波形の図である。3 (a) to 3 (e) are diagrams of current waveforms for the electromagnetic coil according to the embodiment of the present invention.
１ 非磁性体カバー ２ａ、２ｂ、… 電磁石 ３ 磁極 ４ 電磁コイル ５、８ 吸着面 ６ 非磁性材ブロック ７ 丸穴 1 non-magnetic material cover 2a, 2b, ... electromagnet 3 magnetic pole 4 electromagnetic coil 5, 8 adsorption surface 6 non-magnetic material block 7 round hole
Claims (2)
着保持するようにした電磁吸着装置において、前記吸着
面内に、複数個の電磁石の各磁極端面が、吸着面と面一
に配置してあることを特徴とする電磁吸着装置。1. An electromagnetic attraction device in which an article made of a magnetic material is attracted and held on an attraction surface by magnetic force, and the magnetic pole end surfaces of a plurality of electromagnets are arranged flush with the attraction surface within the attraction surface. An electromagnetic adsorption device characterized by being provided.
および消磁制御が可能としてある請求項１記載の電磁吸
着装置。2. The electromagnetic attraction device according to claim 1, wherein each of the plurality of electromagnets is capable of independently controlling excitation and demagnetization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28370691A JPH0596486A (en) | 1991-10-03 | 1991-10-03 | Electromagnetic attracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28370691A JPH0596486A (en) | 1991-10-03 | 1991-10-03 | Electromagnetic attracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0596486A true JPH0596486A (en) | 1993-04-20 |
Family
ID=17669030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28370691A Pending JPH0596486A (en) | 1991-10-03 | 1991-10-03 | Electromagnetic attracting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0596486A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551958A (en) * | 1990-07-02 | 1996-09-03 | University Of Hawaii | Process for charcoal production from woody and herbaceous plant material |
| JP2002160817A (en) * | 2000-11-28 | 2002-06-04 | Koyabe Seiki:Kk | Magnet conveyor belt |
| JP2008073928A (en) * | 2006-09-20 | 2008-04-03 | Fujifilm Corp | Method of handling nozzle plate |
| JP2010264522A (en) * | 2009-05-12 | 2010-11-25 | Ihi Corp | Member handling device |
| FR2957287A1 (en) * | 2010-03-11 | 2011-09-16 | Realisation Des Prehenseurs Ind Prehenso Soc D Et | Electromagnetic device controlling method for gripping electromagnetic sucker in industrial manipulation, involves releasing piece in alternating current by gradual decline in value of current intensity |
| US8376624B2 (en) | 2007-06-27 | 2013-02-19 | Ntn Corporation | Rolling contact member and rolling bearing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122895A (en) * | 1987-11-09 | 1989-05-16 | Shinko Electric Co Ltd | Electromagnet device for hanging up plate material |
-
1991
- 1991-10-03 JP JP28370691A patent/JPH0596486A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122895A (en) * | 1987-11-09 | 1989-05-16 | Shinko Electric Co Ltd | Electromagnet device for hanging up plate material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551958A (en) * | 1990-07-02 | 1996-09-03 | University Of Hawaii | Process for charcoal production from woody and herbaceous plant material |
| JP2002160817A (en) * | 2000-11-28 | 2002-06-04 | Koyabe Seiki:Kk | Magnet conveyor belt |
| JP2008073928A (en) * | 2006-09-20 | 2008-04-03 | Fujifilm Corp | Method of handling nozzle plate |
| US8376624B2 (en) | 2007-06-27 | 2013-02-19 | Ntn Corporation | Rolling contact member and rolling bearing |
| JP2010264522A (en) * | 2009-05-12 | 2010-11-25 | Ihi Corp | Member handling device |
| FR2957287A1 (en) * | 2010-03-11 | 2011-09-16 | Realisation Des Prehenseurs Ind Prehenso Soc D Et | Electromagnetic device controlling method for gripping electromagnetic sucker in industrial manipulation, involves releasing piece in alternating current by gradual decline in value of current intensity |
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