JPH04345498A - Permanent electromagnetic lifting device which can regulate its attraction force - Google Patents

Abstract

PURPOSE:To provide a permanent electromagnetic type lifting device which uses a magnetic attraction means other than an electromagnetic type, and can regulate its magnetic attraction force. CONSTITUTION:The generated magnetic flux of at least one side of a permanent magnet 3 which cannot make the inversion and a permanent magnet 4 which can make the inversion is given to a work through a magnetic pole formed by magnetic members 1 and 2, and the work is adsorbed. As a magnetic flux for control given to the magnetic pole, the magnetic flux generated by a regulation coil 5 is used, and it is used to function to reduce the magnetic flux flowing to the work from the permanent magnet, or to function separately from the magnetic flux of the permanent magnet, and thereby, the magnetic attraction force to the work is regulated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent electromagnetic lifting device for lifting and conveying an appropriate number of plate-shaped magnetic materials by adjusting the magnetic attraction force.

0002

2. Description of the Related Art An electromagnetic magnetic lifting device is used to lift such plate-shaped magnetic materials, and the number of materials to be lifted is controlled by adjusting the electromagnetic attraction force.

0003

Problems to be Solved by the Invention Electromagnetic lifting devices lose their lifting power when the power is cut off, so there is a problem that accidents such as power outages or power cutoffs due to damage to the cord may cause the workpiece, that is, the object to be lifted, to fall.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a permanent electromagnetic lifting device that uses magnetic attraction means other than electromagnetic type and can adjust the magnetic attraction force.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention firstly includes a pair of magnetic members each consisting of an outer magnetic member and an inner magnetic member, and has polarity reversal between these magnetic members. an electromagnetic coil that generates a magnetic flux for reversing the polarity of the reversible permanent magnet, the outer magnetic members are magnetically coupled to each other, and the inner magnetic members are connected to each other with a permanent two sets of magnetic flux generating means in which magnets are arranged and magnetic poles formed at the ends of the inner magnetic member are arranged symmetrically; a magnetic gap formed between the outer and inner magnetic members; and the inner magnetic member. A permanent electromagnetic lifting device capable of adjusting attraction force, comprising: an adjustment coil that is wound around a magnetic member and generates a magnetic flux that passes through the magnetic gap and the magnetic member so as to cancel out the magnetic flux generated by the magnetic flux generating means. , secondly, a pair of magnetic members comprising a permanent magnet whose polarity cannot be reversed, an outer magnetic member and an inner magnetic member that provide the workpiece with magnetic flux generated from both magnetic poles of the permanent magnet whose polarity cannot be reversed; and the magnetic member. a magnetic air gap formed between the magnetic members; and an adjustment coil that is provided in the inner magnetic member and generates a magnetic flux that passes through the magnetic air gap in a direction opposite to the magnetic flux generated by the permanent magnet whose polarity cannot be reversed. A permanent electromagnetic lifting device with adjustable attraction force, thirdly, a permanent magnet with reversible polarity, an electromagnetic coil for switching the polarity of the magnetic flux generated by the permanent magnet, and a magnetic flux generated from the permanent magnet with reversible polarity. A pair of magnetic members consisting of an outer magnetic member and an inner magnetic member through which a magnetic flux is passed to magnetically attract a workpiece, and a magnetic flux that is wound around the pair of magnetic members to cancel out the magnetic flux generated by the permanent magnet. and a permanent electromagnetic lifting device with adjustable attraction force, which is equipped with an adjustment coil, and fourthly, a pair of magnetic members, and a permanent, non-reversible polarity disposed between the magnetic members and supplying magnetic flux between the magnetic members. A magnet, a permanent magnet whose polarity is reversible that generates a magnetic flux that increases or decreases the magnetic flux generated by the permanent magnet whose polarity cannot be reversed, and an auxiliary magnetic flux generating means consisting of an electromagnetic coil wound around this permanent magnet. The present invention provides a permanent electromagnetic lifting device capable of adjusting attraction force, which includes a pair of elements having the above-described structure and an adjustment coil wound around a connecting portion of one of the pair of magnetic members.

[0006]

[Operation] According to the first device, the magnetic flux generated by the permanent magnet whose polarity cannot be reversed is added to the magnetic flux generated by the permanent magnet whose polarity cannot be reversed in the same direction to attract the workpiece, and the workpieces are released in opposite directions. . Then, the attraction force is adjusted by generating magnetic flux using the electromagnetic coil to reduce the magnetic flux generated by the permanent magnet.

According to the second device, the magnetic flux supplied from the permanent magnet whose polarity cannot be reversed to the workpiece via the magnetic member is
Because the magnetic flux passing from the electromagnetic coil to the magnetic member through the magnetic gap is partially canceled out, or is caused to flow in the direction of the gap,
The amount of magnetic flux acting on the workpiece is adjusted by the current flowing through the electromagnetic coil. To release the workpiece, the current value is increased until it completely cancels it out.

According to the third device, the magnetic flux generated by the electromagnetic coil is the magnetic flux generated by the adjustment coil to adjust the magnetic attraction force, and after adjustment, the magnetic flux is attracted by the electromagnetic coil. To release it, demagnetize it with an electromagnetic coil.

According to the fourth device, the method of attraction/release using the electromagnetic coil is different from that of the third device, and the polarity cannot be reversed between a permanent magnet whose polarity cannot be reversed and a permanent magnet whose polarity can be reversed. It is done in the opposite direction.

0010

[Effects of the Invention] According to the present invention, as described above, since the magnetic flux generated by the electromagnetic coil is applied to the magnetic flux generated by the permanent magnet to adjust it, the current applied to the electromagnetic coil can be adjusted to act on the workpiece. The attraction force can be adjusted by adjusting the amount of magnetic flux, and even if there is an accident where the power is cut off, the attraction is carried out by the magnetic flux of the permanent magnet, ensuring safety. Also, the third
In the fourth device, the electromagnetic circuit first adjusts and adsorbs the object, and then permanent electromagnetic adsorption is performed, so safety is similarly ensured.

[0011]

Embodiment FIG. 1 shows a first embodiment of the present invention. In this figure, a yoke 1 as an outer magnetic member has a downward U-shape, and inside the U-shape there are two almost L-shaped magnetic members 2 as inner magnetic members, and a permanent magnet whose polarity cannot be reversed. They are arranged back to back with 3 in between. The magnetic member 2 is arranged so that one end thereof is flush with the end of the yoke 1, and serves as a magnetic pole for suspending the workpiece.
The other ends face each other so as to form a magnetic gap 7 in the middle of the longitudinal portion of the yoke 1 . A permanent magnet 4 whose polarity is reversible is arranged between the upper part of the magnetic member 2 and the yoke 1, and an electromagnetic coil 5 is wound around the permanent magnet 4. Further, an adjustment coil 6 is wound around the lower part of the magnetic member 2.
A polarizing material 8 is arranged between the lower ends of the magnetic members 2 and between the lower ends of the yoke 1.

In this hanging device, the electromagnetic coil 5
When energized to generate a magnetic flux in the same direction as the magnetic flux generated by the permanent magnet 3, the magnetic flux Φ1 as shown by the solid line with an arrow is generated at the magnetic pole.
, Φ2 is generated and a workpiece (not shown) is attracted. At this time, when the adjustment coil 6 is energized to generate magnetic flux Φ3 as shown by the broken line with an arrow, magnetic fluxes Φ1 and Φ2 as shown by the solid line are generated.
are canceled out and the magnetic attraction force is reduced. By adjusting the current flowing through the adjustment coil 6, the magnetic attraction force can be reduced appropriately. Furthermore, when the power supply to the adjustment coil 6 is stopped and the power supply direction to the electromagnetic coil 5 is reversed, the magnetization direction of the permanent magnet 4 is reversed and the magnetic flux generated by the permanent magnet 3 is canceled out, so that the magnetic attraction force of the hanging device disappears. The hanging device turns off.

FIG. 2 shows a second embodiment of the invention. In this embodiment, the permanent magnet 4 whose polarity is reversible is not provided, and the magnetic flux Φ1 generated by the permanent magnet 3 whose polarity cannot be reversed is partially canceled out by the magnetic flux Φ3 generated by the adjustment coil 6 and passing through the magnetic gap 7. It is composed of

FIG. 3 shows a second embodiment of the invention. In this case, permanent magnets 3 whose polarities cannot be reversed are provided around the circumference, one magnetic gap 7 is provided in the center, and Φ3 acts to draw the magnetic flux of the permanent magnet toward the gap, controlling the magnetic flux of Φ1. ing. As a result, since the magnetic directions of the magnetic fluxes Φ1 and Φ3 flowing through the permanent magnets are the same, magnetic leakage is also reduced and there is no adverse effect on the permanent magnets.

FIGS. 4(a), 4(b) and 4(c) show a third embodiment of the present invention. In this embodiment, an electromagnetic lifting circuit is incorporated into a permanent electromagnetic lifting device using a permanent magnet 4 whose polarity is reversible without using a permanent magnet whose polarity cannot be reversed. Figures (b) and (c)
) are shown divided into permanent electromagnetic magnetic circuits and electromagnetic magnetic circuits for explanation purposes. That is, in the permanent electromagnetic circuit during suction and transportation, as shown in FIG. 2(b), the magnetic flux Φ1 generated by the permanent magnet 4 whose polarity is reversible is transferred from the magnetic member 2 to the yoke 1 via a workpiece (not shown) as shown by the solid line. Magnet 4
Return to The electromagnetic circuit during suction adjustment is shown in the same figure (c).
As shown in FIG. 2, the magnetic flux Φ3 generated by the adjustment coil 6 passes between the yoke 1 and a workpiece (not shown) as indicated by a broken line. When these are combined, the result is as shown in figure (a).

FIGS. 5(a), 5(b) and 5(c) show a fourth embodiment of the present invention. In this embodiment, two sets of permanent electromagnetic lifting devices each having a permanent magnet whose polarity cannot be reversed are added to the embodiment shown in FIG. In a), two sets of the elements shown in FIG. 5(b) are arranged side by side, and an adjustment coil 6 is wound around the center portion as shown in FIG. 1(c). That is, as shown in FIG. 2(b), two permanent magnets 3 whose polarities cannot be reversed are arranged near the ends between the yoke 1 and the magnetic member 2, and a magnet 4 whose polarity can be reversed and an electromagnetic coil are arranged in the center. 5 will be provided. As a permanent electromagnetic circuit during suction transportation, this element combines the magnetic flux Φ1 by the permanent magnet 3 and the magnetic flux Φ2 during suction by the permanent magnet 4 to act on the workpiece, as shown by the solid line with an arrow. In the element of the electromagnetic circuit shown in FIG. 3(c) during suction adjustment, the magnetic flux Φ3 from the adjustment coil 6 passes through the yoke 1 and a workpiece (not shown), as shown by the broken line. If two elements shown in Fig. 2(b) are prepared and combined with an element configured as a yoke 1 around which the adjustment coil 6 is wound as shown in Fig. 2(c), the result will be as shown in Fig. 1(a).
) is an example.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a second modification of the embodiment.

FIG. 4 shows a third embodiment of the present invention, and FIG.
) shows the overall structure of the embodiment in the same figure, and (b) and (
c) is a diagram showing the decomposed structure.

FIG. 5 shows a fourth embodiment of the present invention, and FIG.
) shows the overall structure of the embodiment in the same figure, and (b) and (
c) is a diagram showing the decomposed structure.

[Explanation of symbols]

1 Outer magnetic member 2 Inner magnetic member 3. Permanent magnet whose polarity cannot be reversed 4. Permanent magnet with reversible polarity 5 Electromagnetic coil 6 Adjustment coil 7 Magnetic air gap 8 Polarized material

Claims (4)

[Claims] [Claim 1] A pair of magnetic members each consisting of an outer magnetic member and an inner magnetic member, a permanent magnet whose polarity is reversible between these magnetic members, and a polarity of the reversible permanent magnet is reversed. The outer magnetic members are magnetically coupled to each other, a permanent magnet whose polarity cannot be reversed is arranged between the inner magnetic members, and the magnetic coil is formed at an end of the inner magnetic member. two sets of magnetic flux generating means having magnetic poles arranged symmetrically; a magnetic gap formed between the outer and inner magnetic members; and a magnetic gap wound around the inner magnetic member so as to cancel the magnetic flux generated by the magnetic flux generating means. and an adjustment coil that generates a magnetic flux that passes through the magnetic gap and the magnetic member. 2. A pair of magnetic members comprising a permanent magnet whose polarity cannot be reversed, an outer magnetic member and an inner magnetic member that provide a workpiece with magnetic flux generated from both magnetic poles of the permanent magnet whose polarity cannot be reversed; and the magnetic member. a magnetic air gap formed between the magnetic members; and an adjustment coil that is provided in the inner magnetic member and generates a magnetic flux that passes through the magnetic air gap in a direction opposite to the magnetic flux generated by the permanent magnet whose polarity cannot be reversed. Permanent electromagnetic lifting device with adjustable adsorption force. 3. A permanent magnet whose polarity is reversible, an electromagnetic coil which switches the polarity of the magnetic flux generated by the permanent magnet, and an outer magnetic member through which the magnetic flux generated from the permanent magnet whose polarity is reversible is passed and which magnetically attracts a workpiece. and an inner magnetic member, and an adjustment coil that is wound around the pair of magnetic members and generates a magnetic flux that cancels out the magnetic flux generated by the permanent magnet. type lifting device. 4. A pair of magnetic members, a permanent magnet whose polarity cannot be reversed and which is arranged between these magnetic members and supplies magnetic flux between the magnetic members, and a magnetic flux generated by the permanent magnet whose polarity cannot be reversed. A pair of elements having an auxiliary magnetic flux generating means consisting of a polarity reversible permanent magnet that generates a magnetic flux that increases or decreases the magnetic flux, and an electromagnetic coil wound around the permanent magnet, and one of the pair of magnetic members shared. Permanent electromagnetic lifting device with adjustable adsorption force equipped with an adjustment coil wrapped around the connecting part.