JPH10328959A - Permanent electromagnetic attraction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic attraction device miniaturizing the constitution of moving parts and more suitable for action in poor environment. SOLUTION: This device is provided with a permanent magnet part 10 having permanent magnets 13 and magnetic poles 11, 12 and having an attraction face below so as to attract a workpiece W, an electromagnet part 20 having electromagnetic coils 23 and magnetic poles 21, 22 and arranged in such a way as to form a common magnetic circuit with the permanent magnet part 10 and supported in a specifies position in a specified path, and a current applying device for applying a forward current to the electromagnets of the electromagnet part 20 so as to have the common magnetic field with the permanent magnets 13 of the permanent magnet part 10 and to make magnetic flux act upon the attraction face and applying a reverse current to form a closed magnetic path by the electromagnets and permanent magnets 13 so as not to make the magnetic field act upon the attraction face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent electromagnetic adsorption apparatus for magnetically adsorbing and transporting residual materials, chips, scales, slags and the like generated when cutting a magnetic material such as a steel plate.

[0002]

2. Description of the Related Art To process waste such as residual material, chips, scales and slag generated when processing a steel sheet or the like, sweep with a broom or a spatula. The removal operation is performed depending on whether the material is scraped off or magnetically attracted.

[0003] Each of these has a characteristic, but here, the object by magnetic means is targeted.
As a method using magnetic means, there is a conventional method as disclosed in, for example, JP-A-2-280963.

[0004] In this method, an electromagnet is moved by a conveyor moving along a predetermined path, magnetic residues along the predetermined path are attracted and conveyed by the electromagnet, and energization of the electromagnet is stopped at the end of the conveyor to collect the magnetic residues. It is housed in a box.

In this prior art, since the entire structure for adsorbing the magnetic residue including the electromagnet is moved by the conveyor, the size of the apparatus is large, and noise is easily generated accordingly. In addition, the device operates in an environment where not only the magnetic residue but also the cooling water scatters, and it is not appropriate to move the energizing means including the electromagnet.

FIG. 4 shows a conventional device in which this electromagnet is constituted by a permanent electromagnetic system. This is a combination of a permanent magnet and an electromagnet combined with a magnetic pole. The electromagnet and the permanent magnet are incorporated into an E-shaped magnetic pole with a vertical cross section. The yoke 3 is disposed so as to cover from above with the center 1 and 2 positioned at the center position, and the permanent magnet 4 is attached to the lower iron core 1.
Is formed by combining the upper core 2 with the electromagnet coil 5.

In this apparatus, when the energizing direction of the electromagnet coil 5 is set to the forward direction, the magnetization direction of the iron core 2 is N on the upper side in the figure and S on the lower side. When the work W is attracted and the energizing direction of the electromagnet coil 5 is reversed, the electromagnet and the permanent magnet form a closed magnetic path, the magnetic field does not act on the work W, and the work W is released.

However, this apparatus moves the entire apparatus including the electromagnets and the permanent magnets when transporting the work, so that the moving part is large, generates a loud noise, and energizes the electromagnets during the movement. Therefore, there is a trouble in that the cable is extended to the destination.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a magnetic attraction device which can be configured to have a small moving portion and which is more suitable for operation in a poor environment.

[0010]

In order to achieve the above object, the present invention has a permanent magnet and a magnetic pole core according to claim 1;
A permanent magnet portion configured to have a suction surface for suctioning the work downward, an electromagnet coil and a magnetic pole core, and arranged to form a common magnetic circuit with the permanent magnet portion; An electromagnet portion supported at a predetermined position in a predetermined path, and a forward direction current is applied to the electromagnet of the electromagnet portion to make a magnetic field common with the permanent magnet of the permanent magnet portion to cause a magnetic flux to act on the attraction surface, and a reverse direction. 3. The permanent electromagnetic adsorption device, comprising: an energization device that energizes the electromagnet and the permanent magnet to form a closed magnetic path to energize the adsorption surface so as not to apply a magnetic field. The permanent magnet unit in the permanent electromagnetic adsorption device according to 1, wherein the magnetic poles are arranged in a horizontal direction, and a magnetic pole iron core is arranged to face each magnetic pole,
The electromagnet section has a magnetic pole corresponding to the magnetic pole core,
A permanent electromagnetic attraction device arranged above the permanent magnet portion,
4. A permanent magnet unit according to claim 3, wherein the permanent magnet unit has a permanent magnet and a magnetic pole core, and is configured to have an attraction surface for attracting a workpiece below, and moves the permanent magnet unit along a predetermined path. An electromagnet section having a transport mechanism, an electromagnet coil and a magnetic pole core, arranged to form a common magnetic circuit with the permanent magnet section, supported at a predetermined position on the predetermined path, and an electromagnet of the electromagnet section By applying a forward current to make the magnetic field common to the permanent magnet of the permanent magnet portion and applying a magnetic flux to the attracting surface, and performing a reverse current to form a closed magnetic path by the electromagnet and the permanent magnet. The permanent electromagnetic attraction device, comprising: an energizing device that energizes the attraction surface so as not to apply a magnetic field; and an elevating mechanism that moves the electromagnet unit up and down at the predetermined position included in the predetermined path. Claim 3 The transport mechanism in the mounting of the permanent electromagnetic adsorption device, the a belt conveyor for conveying along a predetermined path permanent electromagnetic adsorption device, and according to claim 5,
The elevating mechanism of the permanent electromagnetic attraction device according to claim 3 provides a permanent electromagnetic attraction device provided at the predetermined position set above the predetermined path.

[0011]

1 to 3 show an embodiment of the present invention. The main components in these embodiments are a permanent magnet 10 and an electromagnet 20 which can be moved up and down on the permanent magnet 10 as shown in FIGS.
In FIG. 3, the work W is sucked and released by these main elements, and FIG. 3 shows a case where the magnetic residue X is sucked, conveyed, and released.

FIGS. 1A and 1B show a case where the work W is released and sucked in relation to the excitation state of the electromagnet 20, and FIG. 2 shows a case where the magnetic residue is sucked. FIG. 3 shows the configuration of an apparatus for sucking and transporting magnetic residues.

First, FIG. 1A shows a case where a closed magnetic path is formed by the permanent magnet 10 and the electromagnet 20 so that the magnetic field generated by the permanent magnet 10 is not applied to the work W. The permanent magnet 10 has a pair of permanent magnets 13 between a central magnetic pole 11 and a pair of magnetic poles 12 arranged on both sides of the central magnetic pole 11.
Arrange so that it becomes a pole. As a result, the center pole 11 becomes S
And the magnetic poles 12 on both sides become N poles.

The magnetic poles 21 and 22 of the electromagnet 20 are
The magnetic poles 11 and 12 of the permanent magnet 10 are arranged such that different poles face each other. The magnetic field of the magnetic poles 11 and 12 forms a magnetic field that passes through the work W and moves the work to the magnetic pole 1.
1, which acts to adsorb to 1, 1
As shown in (a), when the magnetic field of the electromagnet 20 is applied to cause the generated magnetic field of the permanent magnet 10 to move toward the electromagnet 20, the generated magnetic field of the permanent magnet 10 supposed to be directed to the work W is changed to the electromagnet 20.
Head for. As a result, the permanent magnet 10 cannot attract the work W, and releases the work W.

Next, according to FIG. 1B, as shown in FIG. 1A, the energizing direction of the electromagnet 20 which has been in the attracted state with the permanent magnet 10 is reversed, so that the magnetic pole of the permanent magnet 10 and the electromagnet are changed. The 20 magnetic poles have the same poles facing each other. As a result, the electromagnet 20 receives a force that moves away from the permanent magnet 10, and the electromagnet 20 is separated upward from the permanent magnet 10. The magnetic field generated by the electromagnet 20 is
When it no longer acts on the work W, the generated magnetic field of the permanent magnet 10 itself moves toward the work W, and the permanent magnet 10 attracts the work W. If the permanent magnet 10 is transported in this state, the workpiece W can be transported.

FIG. 2 shows a state in which a magnetic residue X is adsorbed instead of the work W in FIG. 1B. As described above, when the permanent magnet 10 is present alone, the generated magnetic field is directed to the work. Here, the magnetic residue X is adsorbed instead of the work. This is shown in FIG.
This is the same as the state shown in FIG. Then, although not shown, the magnetic residue X is released by operating the electromagnet as shown in FIG.

FIG. 3 is a view showing the structure of FIG.
Adsorption of the magnetic residue X by the permanent magnet 10 as shown in FIG.
The release of the magnetic residue X by the electromagnet is performed in accordance with the movement of the belt conveyor.

For this purpose, the permanent magnet 10 is attached to the belt 14 of the belt conveyor so that the permanent magnet 10 can reciprocate on a predetermined path. The belt 14 is hung on a sprocket 15, and the permanent magnet 10 reciprocates by driving the sprocket 15 by a motor 16. Above a predetermined position on one end side of the belt conveyor, that is, a position where the permanent magnet 10 stops, an electromagnet 20 is supported by an air cylinder 24 so as to be able to move up and down, and power is supplied from a power supply 25.

In this configuration, the permanent magnet 10 is now placed at the right end of the belt conveyor in the figure, and then the belt conveyor 14 is operated to move the permanent magnet 10 to the left in the figure. During this movement, the magnetic pole of the permanent magnet 10 (not shown)
On the surface, magnetic residue X such as residual material, chips, scale,
Are sucked and transported. Then, when power is supplied to the electromagnet 20 and the magnetic field of the permanent magnet 10 is directed to the electromagnet 20 on the residue pocket 30 at the left end of the belt conveyor in the figure, the magnetic residue X falls into the residue pocket 30. Thereafter, the electromagnet 20 is energized in the reverse direction to separate the electromagnet 20 from the permanent magnet, and the permanent magnet 10 is moved to the right end in the figure along a predetermined path by a belt conveyor. Then, the above operation is repeated.

As described above, since the objects to be conveyed are the permanent magnet, the work adsorbed on the permanent magnet and the magnetic residue, the structure is simple and the speed can be easily increased.

[0021]

As described above, the present invention has the following advantages.

First, a magnetic attraction device is constituted by a permanent magnet portion and an electromagnet portion which can be separated from each other, and a magnetic field generated by the permanent magnet portion is changed by changing a magnetic field generated by the electromagnet portion. Workpieces are attracted and released by acting on or not acting on objects, so a permanent magnet part is sufficient when attracting a workpiece, etc. The work can be moved by attracting the work to the magnet part.
Therefore, there is no need to supply power to the permanent magnet unit that moves together with the work, and the configuration of the apparatus is simplified.

Next, as in the second aspect, the permanent magnet portion in the permanent electromagnetic attraction device according to the first aspect has a magnetic pole arranged in a horizontal direction, and a magnetic pole iron core is arranged to face each magnetic pole,
The electromagnet section has a magnetic pole corresponding to the magnetic pole core,
Since the permanent magnet portion is disposed above the permanent magnet portion, the permanent magnet portion can be freely moved by raising the electromagnet portion, and the movement of the permanent magnet portion that has absorbed the work can be easily performed.

According to a third aspect of the present invention, the permanent magnet section is moved along a predetermined path by the transport mechanism, and the electromagnet section is moved up and down at a predetermined position included in the predetermined path by the elevating mechanism. When transporting a work or the like adsorbed to the electromagnet, the position of the electromagnet for changing the magnetic field generated by the permanent magnet by the electromagnet can be easily adjusted.

Further, since the transport mechanism is a belt conveyor that transports along a predetermined path, the permanent magnet portion that has attracted the work can be transported smoothly.

Further, since the lifting mechanism is provided at a predetermined position set above a predetermined path,
The work can be smoothly released at a predetermined position.

[Brief description of the drawings]

FIG. 1 shows an operation relationship between a permanent magnet unit and an electromagnet unit according to an embodiment of the present invention. FIG. 1A shows a relationship between a permanent magnet unit and an electromagnet unit when a workpiece is released. FIG.
(B) is an explanatory view showing the relationship between the permanent magnet section and the electromagnet section when the workpiece is attracted.

FIG. 2 is an explanatory diagram showing a state in which magnetic residues are adsorbed by a permanent magnet unit in the embodiment of FIG. 1;

FIG. 3 is a diagram showing a configuration example when the present invention is applied to a magnetic residue collection device.

FIG. 4 is a diagram showing a configuration of a conventional permanent electromagnetic type magnetic work suction device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron core 2 Iron core 3 Yoke 4 Permanent magnet 5 Electromagnetic coil 10 Permanent magnet 11 Magnetic pole 12 Magnetic pole 13 Permanent magnet 14 Belt conveyor 15 Sprocket 16 Motor 20 Electromagnet 21 Magnetic pole 22 Magnetic pole 23 Electromagnetic coil 24 Air cylinder 25 Power supply

Claims (5)

[Claims] 1. A permanent magnet comprising: a permanent magnet portion having a permanent magnet and a magnetic pole core and having a suction surface for adsorbing a workpiece below; an electromagnet coil and a magnetic pole core; An electromagnet portion arranged so as to form a common magnetic circuit with the portion, and supported at a predetermined position in the predetermined path; and applying a forward current to the electromagnet of the electromagnet portion to generate a magnetic field with the permanent magnet of the permanent magnet portion. An energizing device that applies a magnetic flux to the attracting surface in common, and also conducts current in the reverse direction to form a closed magnetic path by the electromagnet and the permanent magnet so that a magnetic field does not act on the attracting surface. Equipped with a permanent electromagnetic adsorption device. 2. The permanent electromagnetic attraction device according to claim 1, wherein the permanent magnet portion has magnetic poles arranged in a horizontal direction, and a magnetic pole core is arranged to face each magnetic pole, and the electromagnet portion includes the magnetic pole core. Has a magnetic pole corresponding to
A permanent electromagnetic attraction device disposed above the permanent magnet unit. 3. A permanent magnet section having a permanent magnet and a magnetic pole core and having an attracting surface for attracting a work below, and a transport for moving the permanent magnet section along a predetermined path. An electromagnet section having an electromagnet coil and a magnetic pole core, arranged to form a common magnetic circuit with the permanent magnet section, and supported at a predetermined position in the predetermined path; and an electromagnet of the electromagnet section. The energization is performed in the forward direction to share the magnetic field with the permanent magnet of the permanent magnet portion to apply a magnetic flux to the attracting surface, and the energization in the reverse direction is performed to form a closed magnetic path by the electromagnet and the permanent magnet. A permanent electromagnetic attraction device, comprising: an energization device that energizes the attraction surface so as not to apply a magnetic field; and an elevating mechanism that elevates and lowers the electromagnet portion at the predetermined position included in the predetermined path. 4. The permanent electromagnetic attraction device according to claim 3, wherein the transport mechanism is a belt conveyor that transports along the predetermined path. 5. The permanent electromagnetic attraction device according to claim 3, wherein the lifting mechanism is provided at the predetermined position set above the predetermined path.