JPH02270739A - Magnetic floating device for magnetic plate - Google Patents
Magnetic floating device for magnetic plateInfo
- Publication number
- JPH02270739A JPH02270739A JP8928289A JP8928289A JPH02270739A JP H02270739 A JPH02270739 A JP H02270739A JP 8928289 A JP8928289 A JP 8928289A JP 8928289 A JP8928289 A JP 8928289A JP H02270739 A JPH02270739 A JP H02270739A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- magnetic
- gap
- plate
- electromagnet
- 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.)
- Granted
Links
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000005339 levitation Methods 0.000 claims description 13
- 230000005284 excitation Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 49
- 239000010959 steel Substances 0.000 abstract description 49
- 239000000696 magnetic material Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Load-Engaging Elements For Cranes (AREA)
- Non-Mechanical Conveyors (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は磁性板材用磁気浮上装置に関し、特に磁性板材
の浮上位置制御の容易な磁性板材用磁気浮上装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic levitation device for magnetic plates, and more particularly to a magnetic levitation device for magnetic plates that allows easy control of the floating position of the magnetic plates.
[従来の技術]
この種の磁性板材用磁気浮上装置は、磁性板材移送時の
非接触支持、又は、鋼板塗装ラインにおける非接触鋼板
先端保持等に用いられている。[Prior Art] This type of magnetic levitation device for magnetic plates is used for non-contact support during transfer of magnetic plates or for non-contact holding of the tip of a steel plate in a steel plate coating line.
従来の磁性板材用磁気浮上装置は、例えば、第3図に示
すように、鋼板1の平面上方に、ギャップG1を隔てて
配される鋼板吸引用上部電磁石2と、ギャップG1を検
出する距離センサー4と、鋼板吸引用上部電磁石2のコ
アを巻回する電磁コイル3に励磁電流を流すための制御
電源5と、距離センサー4からの出力信号に基づいて、
ギャップG1を所定の離間距離に維持するように励磁電
流を制御する制御部(図示しない)とから構成され、鋼
板1を水平に非接触にて定位置に支持するものである。For example, as shown in FIG. 3, a conventional magnetic levitation device for magnetic plates includes an upper electromagnet 2 for attracting a steel plate disposed above the plane of a steel plate 1 across a gap G1, and a distance sensor for detecting the gap G1. Based on the output signal from the distance sensor 4,
It is composed of a control section (not shown) that controls the excitation current so as to maintain the gap G1 at a predetermined distance, and supports the steel plate 1 horizontally in a fixed position without contacting it.
ところで、電磁石の吸引力の調整においては、電磁石に
より鋼板が吸引されて、ギャップG1が小さくなればな
るほど、吸引力Fcは強くなり、そのままでは、電磁石
に鋼板が接触してしまうことになるため、係る接触を防
止するように、ギャップG1に対応した吸引力制御を必
要とする。By the way, when adjusting the attraction force of the electromagnet, the more the electromagnet attracts the steel plate and the gap G1 becomes smaller, the stronger the attraction force Fc becomes, and if left as it is, the steel plate will come into contact with the electromagnet. In order to prevent such contact, suction force control corresponding to the gap G1 is required.
しかも、電磁石のギャップ吸引力Fcは、磁気飽和や磁
気漏洩等を無視すれば、一定の励磁下では、ギャップG
1の2乗に反比例して変化するため、電磁石の励磁電流
の制御を大幅に且つ速く行う必要があり、また、ギャッ
プG1の変化割合を小さくして、吸引力の変動をも極力
抑えなければならない。Furthermore, if magnetic saturation, magnetic leakage, etc. are ignored, the gap attraction force Fc of the electromagnet is
Since it changes in inverse proportion to the square of 1, it is necessary to control the excitation current of the electromagnet significantly and quickly, and also to suppress fluctuations in the attractive force as much as possible by reducing the rate of change of the gap G1. No.
[発明が解決しようとする課題]
しかしながら、従来の磁性板材用磁気浮上装置では、吸
引力Fcの変動を極力抑えるために、ギャップG1を大
きくして、その変化割合を相対的に小さく抑えることは
、逆に、吸引力Fcの大幅な減少に対抗して鋼板の保持
重量に応じた吸引力Fcを必要とすることとなり、一般
の鋼材運搬用電磁石に比して、電磁石自体を大型化しな
ければならず、装置の軽量小型化の要請に反する。[Problems to be Solved by the Invention] However, in the conventional magnetic levitation device for magnetic plate materials, in order to suppress fluctuations in the attractive force Fc as much as possible, it is difficult to increase the gap G1 and keep the rate of change relatively small. On the other hand, in order to counter the significant decrease in the attraction force Fc, it is necessary to increase the attraction force Fc according to the weight of the steel plate held, and the electromagnet itself must be made larger compared to general electromagnets for transporting steel materials. This goes against the demand for lighter and more compact equipment.
また、電磁石を太き(することは、励磁コイルも大型化
し、インダクタンスを増加させてしまうため、距離セン
サー等からのフィードバック信号に対し追随性を悪化さ
せてしう。その結果、電磁石の吸引力Fcの制御性が低
下し、ギャップG1に対応した吸引力制御を困難にする
という欠点がある。In addition, making the electromagnet thicker (which means making the excitation coil larger and increasing the inductance, worsens the ability to follow feedback signals from distance sensors, etc.).As a result, the attractive force of the electromagnet decreases. This has the disadvantage that the controllability of Fc deteriorates, making it difficult to control the suction force corresponding to the gap G1.
すなわち、従来の磁性板材用磁気浮上装置においては、
ギャップG1の変動抑制と、吸引力の制御性とは、互い
に二律背反の関係にあり、その有効な解決策を未だ見出
し得てないのが現状である。In other words, in the conventional magnetic levitation device for magnetic plate materials,
Suppression of fluctuations in the gap G1 and controllability of the suction force are in a trade-off relationship with each other, and at present no effective solution has yet been found.
さらに、上方から吸引支持される鋼板特有の問題として
、鋼板が薄板又は広幅になると、その弾力性と相俟って
、鋼板自身に幅方向のタワミによるダレ等を生じさせて
しまう問題もあった。Furthermore, a problem unique to steel plates that are suction-supported from above is that when the steel plate becomes thin or wide, its elasticity, along with its elasticity, causes the steel plate itself to sag due to deflection in the width direction. .
そこで、本発明の技術的課題は、上記欠点に鑑み、ギャ
ップG1の変動抑制と吸引力の制御性とを同時に向上さ
せ、且つ、鋼板のタワミによるダレ等をも生じさせない
鋼板用磁気浮上装置を提供することである。Therefore, in view of the above-mentioned drawbacks, the technical problem of the present invention is to provide a magnetic levitation device for steel plates that simultaneously improves the suppression of fluctuations in the gap G1 and the controllability of the attraction force, and also does not cause sag etc. due to the bending of the steel plate. It is to provide.
[課題を解決するための手段]
本発明によれば、平面が水平になるように配された磁性
板材に対して、上方側に配される吸引用電磁石部と、該
吸引用電磁石部と前記磁性板材との離間距離を検知する
距離センサーと、該距離センサーからの出力信号に基づ
いて、前記離間距離を一定に維持するように、前記吸引
用電磁石部への励磁電流を制御する励磁電流制御部とを
有する磁性板材用磁気浮上装置において、前記磁性板材
のうぢの互いに対向する一対の側面から実質的に水平方
向に離間した第1及び第2の側面磁石部をそれぞれ設け
、該第1及び第2の側面磁石部により、前記一対の側面
にそれぞれ磁極を形成することを特徴とする磁性板材用
磁気浮上装置が得られる。[Means for Solving the Problems] According to the present invention, an attraction electromagnet section disposed above a magnetic plate material arranged so that its plane is horizontal; a distance sensor that detects a separation distance from the magnetic plate; and excitation current control that controls an excitation current to the attracting electromagnet so as to maintain the separation distance constant based on an output signal from the distance sensor. A magnetic levitation device for a magnetic plate having a first and second side magnet parts, each of which is provided with first and second side magnet parts spaced apart in a substantially horizontal direction from a pair of mutually opposing side surfaces of the magnetic plate; A magnetic levitation device for magnetic plate material is obtained, characterized in that magnetic poles are formed on each of the pair of side surfaces by the second side surface magnet portion.
[実施例] 次に、本発明の一実施例を図面を参照して説明する。[Example] Next, one embodiment of the present invention will be described with reference to the drawings.
第1図に示すように、本実施例に係わる鋼板用磁気浮上
装置は、まず、従来と同様に、鋼板1の平面上方にギャ
ップG1を隔てて配される鋼板吸引用上部電磁石2と、
ギャップG1を検出する距離センサー4と、鋼板吸引用
上部電磁石2のコアを巻回する上部電磁コイル3に励磁
電流を流すための制御電源5と、距離センサー4がらの
出方信号に基づいて、ギャップG1を所定の離間距離に
維持するように励磁電流を制御する制御部(図示しない
)とからなる構成に、さらに、本発明に係わる第1及び
第2の側面磁石部6,6が、レベル制御改善用として、
鋼板1のうちの互いに対向する一対の側面から実質的に
水平方向に、ギャップG2を経て離間して設けられてい
る。As shown in FIG. 1, the magnetic levitation device for steel plates according to this embodiment first includes an upper electromagnet 2 for attracting a steel plate, which is arranged above the plane of the steel plate 1 with a gap G1 in between, as in the conventional case.
Based on the output signal from the distance sensor 4 that detects the gap G1, the control power source 5 that causes an excitation current to flow through the upper electromagnetic coil 3 that winds the core of the upper electromagnet 2 for attracting a steel plate, and the distance sensor 4, The configuration includes a control section (not shown) that controls the excitation current so as to maintain the gap G1 at a predetermined distance, and the first and second side magnet sections 6, 6 according to the present invention are further provided with a level For improving control,
They are provided substantially horizontally apart from a pair of mutually opposing side surfaces of the steel plate 1 via a gap G2.
第2図を参照して、第1及び第2の側面磁石部6.6に
ついて詳細に説明する。The first and second side magnet portions 6.6 will be described in detail with reference to FIG.
第1及び第2の側面磁石部6.6は、まず、断面コの字
状を呈するコア本体7と、コア本体7を巻回する側面電
磁コイル8とがら構成され、それぞれ、鋼板1の両側面
部において、磁気回路を形成する。The first and second side magnet parts 6.6 are first composed of a core body 7 having a U-shaped cross section and a side electromagnetic coil 8 wound around the core body 7, and each of the first and second side magnet parts 6. A magnetic circuit is formed in the step.
コア本体7は、一端がギャップG2を介して鋼板1の側
面に臨む底辺部9と、底辺部9の他端から上方に延在し
て起立する柱部10と、柱部10の上端から鋼板側に延
在する上辺部11と、上辺部11の先端からギャップG
3を介して鋼板1の上面と対面して延びる体面部12と
から構成され、側面電磁コイル8は、底辺部9に巻回さ
れている。The core body 7 includes a bottom portion 9 whose one end faces the side surface of the steel plate 1 through a gap G2, a column portion 10 extending upward from the other end of the bottom portion 9 and standing upright, and a steel plate extending from the top end of the column portion 10. The upper side 11 extending to the side and the gap G from the tip of the upper side 11
A side electromagnetic coil 8 is wound around a bottom part 9.
即ち、鋼板1は、底辺部9と対向する側面に形成される
側面磁極と、体面部12と対向する上面に形成される上
面磁極とをもって、第1及び第2の側面磁石部6,6と
の磁気回路をそれぞれ構成する。That is, the steel plate 1 has a side magnetic pole formed on the side surface facing the bottom portion 9 and a top surface magnetic pole formed on the top surface facing the body surface portion 12, and the steel plate 1 has the first and second side magnetic portions 6, 6. each constitute a magnetic circuit.
ここで、ギャップG3は、鋼板吸引用上部電磁石2によ
る鋼板1の上下方向へのレベル変化を許容する範囲に設
定される。Here, the gap G3 is set within a range that allows the level change of the steel plate 1 in the vertical direction by the upper electromagnet 2 for attracting the steel plate.
ギャップG2を介して鋼板1の側面に臨む底辺部9は、
その端部を鋼板1の厚みに対応した対向面積に絞られて
おり、これにより、鋼板1の側面磁極との磁束密度をよ
り高くして、鋼板1に対する吸引力の増大を図っている
。The bottom portion 9 facing the side surface of the steel plate 1 through the gap G2 is
The end portions are narrowed to a facing area corresponding to the thickness of the steel plate 1, thereby increasing the magnetic flux density with the side magnetic poles of the steel plate 1 and increasing the attractive force against the steel plate 1.
ギャップG3を介して鋼板1の上面と対面して延びる体
面部12は、鋼板1の上面との対向面積を大きくとるよ
うに、幅広に形成されており、これにより、鋼板1の上
面磁極との磁束密度を低くして、磁束を通り易くしてい
る。The body surface portion 12 that extends to face the top surface of the steel plate 1 through the gap G3 is formed wide so as to have a large opposing area with the top surface of the steel plate 1. The magnetic flux density is lowered to make it easier for the magnetic flux to pass through.
次に、本実施例における作動状態について説明する。Next, the operating state in this embodiment will be explained.
第2図を参照して、距離センサー4からの出力信号に基
づいて、ギャップG1を所定の離間距離に維持するよう
に励磁電流が、制御電源5から上部電磁コイル3に流さ
れ、鋼板1が浮上する。Referring to FIG. 2, based on the output signal from the distance sensor 4, an excitation current is passed from the control power supply 5 to the upper electromagnetic coil 3 so as to maintain the gap G1 at a predetermined distance, and the steel plate 1 is surface.
このとき、鋼板1の側面が、第1及び第2の側面磁石部
6,6の磁極中心と同一レベルにある場合、ギャップ0
2間の吸引力は水平方向に働き、その分力は0となる。At this time, if the side surface of the steel plate 1 is at the same level as the magnetic pole centers of the first and second side magnet parts 6, 6, the gap is 0.
The attractive force between the two acts in the horizontal direction, and the force is zero.
また、図中の実線で示されるように、鋼板自重により鋼
板のレベルが側面磁極よりも、L寸法だけ下がったとき
、吸引力Fは上方斜め方向に働くため、上方向の分力F
v (Fv−FXsjnθ)が発生する。In addition, as shown by the solid line in the figure, when the level of the steel plate is lowered by the L dimension than the side magnetic pole due to the steel plate's own weight, the attractive force F acts in an upward diagonal direction, so the upward component force F
v (Fv-FXsjnθ) is generated.
反対に、図中の破線で示されるように、鋼板1のレベル
が磁極中心より、L寸法だけ上がったときは、分力Fv
は下方向に働く。On the other hand, as shown by the broken line in the figure, when the level of the steel plate 1 rises by the L dimension from the center of the magnetic pole, the component force Fv
works downward.
即ち、鋼板1の両側面は、第1及び第2の側面磁石部6
,6との側面磁極の中心レベル位置に復帰する方向に、
分力Fvを復元力として受けることになる。よって、−
り寸法〜十り寸法までの鋼板1のレベル変動については
、鋼板1が、分力FVにより、自律的に側面磁極中心へ
レベル復帰することから、ギャップG1の変動に伴う上
部電磁石2の吸引力制御における追随性が輔相される。That is, both side surfaces of the steel plate 1 are provided with first and second side magnet portions 6.
, 6 in the direction of returning to the center level position of the side magnetic poles,
The component force Fv will be received as a restoring force. Therefore, -
Regarding the level fluctuation of the steel plate 1 from the dimension 3 to the dimension 10, since the steel plate 1 autonomously returns to the level to the center of the side magnetic pole due to the component force FV, the attractive force of the upper electromagnet 2 due to the fluctuation of the gap G1 Followability in control is facilitated.
なお、鋼板1の両側面は、同時に、水平方向の引っ張り
応力Fhをも受けるため、薄板、幅広鋼板における幅方
向のタレが防止される。Note that since both side surfaces of the steel plate 1 are also subjected to horizontal tensile stress Fh at the same time, sagging in the width direction in a thin plate or a wide steel plate is prevented.
[発明の効果]
以上の説明のとおり、本発明によれば、磁性材の一対の
側面からそれぞれ離間させて、第1及び第2の側面磁石
部を設け、磁性材を、第1及び第2の側面磁石部の磁極
中心へ、自律的にレベル復−9=
帰させるから、上部電磁石の吸引力制御における追随性
を確保することができる。同時に、第1及び第2の側面
磁石部は、磁性材の一対の側面を、水平方向に引っ張る
ため、薄板、幅広鋼板における幅方向のタレを防止する
ことができる。[Effects of the Invention] As described above, according to the present invention, the first and second side magnet portions are provided spaced apart from the pair of side surfaces of the magnetic material, and the magnetic material is attached to the first and second side surfaces of the magnetic material. Since the level is autonomously returned to the center of the magnetic pole of the side magnet part, followability in controlling the attractive force of the upper electromagnet can be ensured. At the same time, since the first and second side magnet parts pull the pair of side surfaces of the magnetic material in the horizontal direction, it is possible to prevent sagging in the width direction of a thin plate or a wide steel plate.
第1図は本発明に係わる一実施例を示す概念図、第2図
は第1図に示した実施例における側面磁石部の一部切欠
き断面図、第3図は従来の磁性板材用磁気浮上装置であ
る。 1・・・鋼板、2・・・鋼板吸引用上部電磁石、
3・・・電磁コイル、4・・・距離センサー4.5・・
・制御電源、6・・・第1及び第2の側面磁石部、7・
・・コア本体、8・・・電磁コイル、9・・・底辺部、
10・・・柱部、11・・・上辺部、12・・・体面部
。
ト 0
1↑ 1−Fig. 1 is a conceptual diagram showing an embodiment of the present invention, Fig. 2 is a partially cutaway sectional view of the side magnet portion of the embodiment shown in Fig. 1, and Fig. 3 is a conventional magnetic plate magnet. It is a levitation device. 1... Steel plate, 2... Upper electromagnet for attracting steel plate,
3... Electromagnetic coil, 4... Distance sensor 4.5...
- Control power supply, 6... First and second side magnet parts, 7.
... Core body, 8 ... Electromagnetic coil, 9 ... Bottom part,
10...Column part, 11...Upper side part, 12...Body surface part. G 0 1↑ 1-
Claims (1)
、上方側に配される吸引用電磁石部と、該吸引用電磁石
部と前記磁性板材との離間距離を検知する距離センサー
と、該距離センサーからの出力信号に基づいて、前記離
間距離を一定に維持するように、前記吸引用電磁石部へ
の励磁電流を制御する励磁電流制御部とを有する磁性板
材用磁気浮上装置において、 前記磁性板材のうちの互いに対向する一対の側面から実
質的に水平方向に離間した第1及び第2の側面磁石部を
それぞれ設け、 該第1及び第2の側面磁石部により、前記一対の側面に
それぞれ磁極を形成することを特徴とする磁性板材用磁
気浮上装置。[Claims] 1) An attraction electromagnet section disposed above a magnetic plate arranged so that its plane is horizontal, and a distance between the attraction electromagnet and the magnetic plate. For magnetic plate material, comprising: a distance sensor for detecting the distance; and an excitation current control section for controlling the excitation current to the attraction electromagnet section so as to maintain the separation distance constant based on the output signal from the distance sensor. In the magnetic levitation device, first and second side magnet portions are provided, respectively, spaced apart in a substantially horizontal direction from a pair of mutually opposing side surfaces of the magnetic plate, and the first and second side magnet portions . A magnetic levitation device for a magnetic plate, characterized in that magnetic poles are formed on each of the pair of side surfaces.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1089282A JPH06104505B2 (en) | 1989-04-07 | 1989-04-07 | Magnetic levitation device for magnetic plates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1089282A JPH06104505B2 (en) | 1989-04-07 | 1989-04-07 | Magnetic levitation device for magnetic plates |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02270739A true JPH02270739A (en) | 1990-11-05 |
JPH06104505B2 JPH06104505B2 (en) | 1994-12-21 |
Family
ID=13966358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1089282A Expired - Lifetime JPH06104505B2 (en) | 1989-04-07 | 1989-04-07 | Magnetic levitation device for magnetic plates |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06104505B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0705778A1 (en) | 1994-09-19 | 1996-04-10 | Kabushiki Kaisha Toshiba | Magnetic non-contact transport system |
JP2008264936A (en) * | 2007-04-20 | 2008-11-06 | Casar Santos Ortiz | Cutting machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61178328A (en) * | 1985-01-30 | 1986-08-11 | Sumitomo Electric Ind Ltd | Magnetic levitation apparatus |
JPS6277883A (en) * | 1985-09-30 | 1987-04-10 | Akio Seki | Attraction type magnetic levitation electromagnet device |
-
1989
- 1989-04-07 JP JP1089282A patent/JPH06104505B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61178328A (en) * | 1985-01-30 | 1986-08-11 | Sumitomo Electric Ind Ltd | Magnetic levitation apparatus |
JPS6277883A (en) * | 1985-09-30 | 1987-04-10 | Akio Seki | Attraction type magnetic levitation electromagnet device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0705778A1 (en) | 1994-09-19 | 1996-04-10 | Kabushiki Kaisha Toshiba | Magnetic non-contact transport system |
US5647477A (en) * | 1994-09-19 | 1997-07-15 | Kabushiki Kaisha Toshiba | Magnetic non-contact transport system |
JP2008264936A (en) * | 2007-04-20 | 2008-11-06 | Casar Santos Ortiz | Cutting machine |
Also Published As
Publication number | Publication date |
---|---|
JPH06104505B2 (en) | 1994-12-21 |
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