JPH05208791A - Permanent magnet type magnetic transport tool - Google Patents

Abstract

PURPOSE: To provide a magnetic transporter capable of transferring to a pause position or reversely by simple operation by providing small weight and bulk and minimizing a loss of a magnetic leakage of a magnetic circuit. CONSTITUTION: A stationary permanent magnet 4 having a horizontal magnetic force direction so that pole pieces 1 of number of pairs are distributed around a vertical axis 2, coupled by parts of a nonmagnetic material and adjacent two pieces 1 are opposite polarities N, S is disposed. Another permanent magnet 6 vertically magnetized so that a nonmagnetic disc 5 is mounted to rotate around the axis 2, magnet group of the pairs of the same number as that of the pieces 1 are distributed along a circumference of the disc 5 and adjacent two magnet groups are opposite polarities is engaged with the disc 5. The disc 5 mounts a horizontal plate 7 for closing a magnetic field. An operator 11 can rotatably drive the disc 5 between two angular positions of a working position and a pause position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a permanent device with a switching device which, in one position, makes it possible to attract an article of ferromagnetic material by means of a carrier, while in another position the carrier is inactive. A magnetic carrier using a magnet.

[0002]

2. Description of the Related Art Permanent magnet type magnetic carriers used for handling loads generally have the disadvantage that they are relatively heavy and bulky devices as compared to loads that they can attract. is doing. In addition, actual fabrication is susceptible to magnetic leakage and loss, which reduces efficiency and requires additional size and weight to obtain the desired attractive force.

[0003]

SUMMARY OF THE INVENTION The present invention is conceived to reduce weight and bulk, and therefore compactness, so that its magnetic circuit minimizes magnetic leakage and loss, i.e. increases attraction in the working position. An object of the present invention is to provide a permanent magnet type magnetic carrier which can be moved to a rest position or vice versa by a simple operation.

[0004]

To this end, the permanent magnet type magnetic carrier according to the invention is mainly-distributed around a substantially vertical axis and connected to each other by means of parts of non-magnetic material, between them. A pair of pole pieces, in which fixed permanent magnets are arranged with a horizontal magnetic force direction such that two adjacent pole pieces have opposite polarities, -on the pole pieces, said substantially vertical axis Other permanent magnets mounted to rotate around and distributed along the circumference in groups of the same number of pairs of pole pieces as the pole pieces, with two adjacent magnet groups perpendicularly magnetized to have opposite polarities A non-magnetic disc or dish into which the magnetic field of a fixed permanent magnet and the permanent magnet supported by said disc or dish is Alternately create N and S poles on the bottom surface of the pole piece Rotationally driving a disc or dish rotating about the substantially vertical axis between a first angular position applied and a second angular position in which the magnetic field is subtracted to neutralize the bottom surface of the pole piece. It has a combination of operating means for carrying out, and suspending or mounting means provided on the upper part of the magnetic carrier.

Therefore, the magnetic carrier of the present invention is
It combines permanent magnets with horizontal magnetic force and permanent magnets with vertical magnetic force. Permanent magnets with a horizontal magnetic force direction arranged between the pole pieces are "ferrite" type magnets,
On the other hand, a permanent magnet with a perpendicular magnetic field direction fitted in a rotating disc or a dish is advantageously a "rare earth" type magnet, the latter magnet preferably presenting a troche-like appearance. The group comprises a plurality of fan-shaped troches distributed on a rotating disc or plate, the central angle of the fan corresponding to the angular spread of one pole piece.

In one particular embodiment of the invention, the magnetic carrier comprises four pole pieces arranged in a square, and the rotating disc or dish comprises four permanent magnets each occupying a 90 ° sector. The lower surface of the four pole pieces, which has groups, so that the angular position of the rotating disc or dish constitutes two north poles and two south poles arranged diagonally, The 90 ° rotation makes the undersides of these four pole pieces neutral. In any case, the invention will be better understood by the following description given with reference to the accompanying drawings, which show by way of non-limiting example one embodiment of a permanent magnet type magnetic carrier according to the invention.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The magnetic carrier shown in the figures has a substantially vertical axis 2
It has four mild steel pole pieces 1 in the general shape of a parallelepiped, distributed in a square around. The pole pieces 1 are connected to each other by a portion 3 of non-magnetic material to form a large block.

Between the pole pieces 1 are also arranged four fixed permanent magnet groups 4 having a horizontal magnetic force direction. The permanent magnet group is oriented such that two pole pieces 1 adjacent to each other under the influence of these magnets have opposite polarities, one forming the north pole and the other forming the south pole. Thus, overall, the four pole pieces 1 constitute two diagonally arranged N poles and two diagonally arranged S poles. The permanent magnet 4 is, for example, a "ferrite" type magnet.

On the block formed by the pole piece 1, the non-magnetic part 3 and the permanent magnet 4, a horizontal non-magnetic disc 5 mounted for rotation about a vertical axis 2 is provided. The non-magnetic disc 5 is fitted with other permanent magnets 6 which are divided into four magnet groups along the circumference according to the arrangement that is well visible in FIGS.

Each magnet group 6 has about 9 magnets on the rotating disk 5.
Occupies a 0 ° sector. The magnet 6 having a perpendicular magnetic force direction is
Having a troche-like appearance, each magnet group 6 has a plurality of troches distributed in a corresponding fan-shaped spread. In each group, the orientation of the magnets 6 is the same, but this orientation alternates with the next magnet group. Therefore, the lower surface of the disk 5 forms the north pole,
It has two diametrically opposed magnet groups 6 and another two magnet groups 6 sandwiched between the former, whose lower surface forms the south pole. The permanent magnet 6 is, for example, a "rare earth" type magnet.

On the rotating disk 5, a permanent magnet 6 of the disk 5 is provided.
A stationary horizontal plate 7 made of mild steel in the shape of a square is arranged which ensures the closing of the magnetic field between the upper poles of the. A screw 8 made of a non-magnetic material, which is arranged at a corner of the plate 7 beyond the outer circumference of the disc 5.
Securely connects the block formed by the pole piece 1, the non-magnetic portion 3, the fixed magnet 4 and the horizontal plate 7.

The horizontal plate 7 has a central opening in which the bearing 9 is mounted. The disc 5 extends through the bearing 9 and on the horizontal plate 7 a vertical shaft 2 such as a button, knob or lever.
A disk 10 is rotatably connected to a shaft 10 that supports an operation tool 11 that allows the disk 5 to be manually rotated. Finally, as shown in FIG. 1 in particular, a handle-shaped hanging device or mounting device 12 bent upward is fixed on the horizontal plate 7 by a screw 8, and the hanging device 12 is mounted on the operating tool 11. There
The horizontal plate 7 extends so as to obliquely connect two non-adjacent corners.

At a particular angular position of the rotating disc 5, the N poles constituted by the undersides of the two magnet groups 6 supported by this disc 5 have the same polarity (due to the influence of the fixed magnet group 4). It contacts the upper surface of the two pole pieces 1, N. The S pole, which is then constituted by the undersides of the other two magnet groups 6 supported by the disc 5, has two other pole pieces 1 whose polarity (due to the influence of the fixed magnet group 4) is also S. Contact the upper surface of. Therefore, the magnetic fields of the fixed permanent magnet 4 and the permanent magnet 6 supported by the disk 5 are applied so as to alternately create four poles N and S on the lower surface of the pole piece 1 (see FIGS. 1 and 2). The magnetic carrier is then in the working position, ie the underside 13 of the four pole pieces 1.
It can attract a load of ferromagnetic material that is pressed against.

The lower surface 13 of the four pole pieces 1 applies a magnetic field to the lower surface 1.
It is advantageous for the magnet 4 to be centered in the center of the carrier so as to be sufficiently concentrated in 3 and to be suitable for attracting, for example, spherical or conical items, and in particular be chamfered on its inside by a chamfer 15.

The rotating disc 5 is 90 degrees larger than its previous position.
Assume that they occupy offset angular positions. The N pole, which is then constituted by the undersides of the two magnet groups 6 supported by the disc 5, contacts the upper side of the two pole pieces 1 whose polarity (due to the influence of the fixed magnet group 4) is S. ..
The south pole constituted by the undersides of the other two magnet groups 6 supported by the disc 5 has, for them, the other two whose polarity (due to the influence of the fixed magnet group 4) is N.
It contacts the upper surface of the individual pole piece 1.

At this position, it is assumed that the total magnetic field of the fixed magnet 4 is equal to the total magnetic field of the magnet 6 supported by the disc 5, so that the undersides of the four pole pieces 1 are neutral. And the magnetic circuit is closed again from the inside of the carrier (see FIG. 3 and especially FIG. 4). Therefore, for the magnetic carrier, the rest position in which no load is attracted by the pole piece 1 is a problem.

Thanks to the operation tool 11, the operator can rotate the disc 5 from the work position to the rest position or vice versa by a good quarter turn. Of course, the present invention
It is not limited to the embodiment of this magnetic carrier with the permanent magnets mentioned above by way of example only, but rather covers all variants and application embodiments which respect the same principle. Therefore, the following in particular do not depart from the scope of the present invention.

Modifying the shape of the permanent magnet and / or
Or varying the number of magnets in each magnet group, -using other types of magnets than those mentioned above, -replacing the rotating disc with other similar supports, such as dishes of non-magnetic material. -Installing equivalent means instead of the above-mentioned manipulations, captures or fixtures-modifying the total number of pole pieces and the total number of magnet groups while keeping all pair numbers, distributions according to the same principle Suppose, for example, that the transition from the work position to the rest position is only two pole pieces that require the rotating disc to rotate half a turn, or the transition from the work position to the rest position is 60 °. ° Assuming the case of 6 pole pieces that need to be rotated, -adapting the shape of the pole piece, especially the shape of its lower part, depending on the item to be handled- Applications other than hoist, especially various parts and It is used for accessories fixed.

[Brief description of drawings]

1 is an exploded perspective view in a working position showing the main components of a magnetic carrier according to the invention.

2 is a vertical cross-sectional view of the magnetic carrier, also in the working position, according to the line II-II in FIG.

FIG. 3 is a horizontal sectional view according to line III-III of FIG. 2, but in the rest position.

FIG. 4 is a vertical sectional view similar to FIG. 3, but corresponding to the rest position.

[Explanation of symbols]

 1 pole piece 2,10 vertical axis 3 part of non-magnetic material 4,6 permanent magnet 5 horizontally rotating non-magnetic disc 7 horizontal fixing plate 8 screw 9 bearing 11 operator 12 suspension tool (mounting tool) 14 pole piece 1 Lower surface 15 Chamfered surface of lower surface 13

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[Procedure amendment]

[Submission date] March 11, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

Claims (5)

[Claims] 1. A pole piece (1) distributed about a substantially vertical axis (2) and connected to each other by a part (3) of non-magnetic material, between which two adjacent pole pieces (1) have opposite polarities. (N,
S), a fixed permanent magnet (4) having a horizontal magnetic force direction is arranged, above the pair of pole pieces (1),-pole pieces (1), said substantially vertical Mounted for rotation about an axis (2) and distributed along the circumference in groups of the same number of pairs as the pole pieces (1), two adjacent magnet groups (6) having opposite polarities (N, S) a non-magnetic disc or dish (5) fitted with another permanent magnet (6) that is magnetized vertically, such as: -on a rotating disc or dish (5), close to the horizontal magnetic field. Plate (7), the magnetic fields of the fixed permanent magnet (4) and the permanent magnet (6) supported by the disc or dish (5) are alternately N on the lower surface (13) of the all-pole piece (1). A first angular position applied to create a pole and a south pole, and the magnetic field is subtracted to neutralize the lower surface (13) of the pole piece (1). Between the second angular position, operating means for rotating the disc or dish rotates (5) about said substantially vertical axis (2) (11),
And-a permanent magnet type magnetic carrier characterized in that it has a combination of hanging or mounting means (12) provided on top of the magnetic carrier. 2. A permanent magnet (4) having a horizontal magnetic force direction arranged between the pole pieces (1) is a "ferrite" type magnet,
On the other hand, the permanent magnet type magnetic carrier according to claim 1, wherein the permanent magnet (6) having a perpendicular magnetic force direction fitted in the rotating disk or the dish (5) is a "rare earth" type magnet. 3. Permanent magnets (6) having a perpendicular magnetic force direction have a troche-like appearance, each group (6) of said magnets being fan-shaped distributed on a rotating disk or dish (5). 3. The permanent magnet type magnetic carrier according to claim 1, further comprising a troche, wherein the central angle of the fan shape corresponds to the angular spread of one pole piece (1). 4. A magnetic carrier having four pole pieces arranged in a square, each of which has a rotating disc or dish (5).
It has four permanent magnet groups (6) occupying a 0 ° sector, so that the underside (13) of the four pole pieces (1) is arranged obliquely with respect to the angular position of the rotating disc or dish (5). Disk or dish (5) which comprises two N poles and two S poles
90 ° rotation of the bottom surface (13) of the four pole pieces (1)
The permanent magnet type magnetic carrier according to any one of claims 1 to 3, wherein: 5. Permanent magnet according to claim 1, characterized in that the lower surface (13) of the pole piece (1) is edged, in particular on the inside by a chamfered surface (15). Type magnetic carrier.