JPS5916386Y2 - Permanent magnet device for lifting - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a permanent magnet device for lifting.

The base shown in Fig. 1 is widely used as a dial gauge stand, and permanent magnets made from this are used in a wide variety of fields.

In the field of lifting chucks, products based on this base stand are also used, and those with a larger structure or those with a number of chucks connected along the suction surface are used in conjunction with each other. A shape that includes gears for movement is used.

In the figure, 1 is a magnetic pole, 2 is a polarization plate, and 3 is a permanent magnet.

The permanent magnet 3 is usually oval in shape as shown in FIGS. 2A and 2B, and is rotatably attached to a hole provided in the magnetic pole 1 by a rotating shaft 4.

Then, by rotating the permanent magnet 3 by 90 degrees, the
- It is designed to perform OFF operation.

In FIG. 1, when the pole of the magnet 3 is in the vertical direction, it is OFF, and when it is in the horizontal direction, it is ON.

What is shown in FIG. 3 is an example in which two permanent magnets 13 a and 13 b are arranged in the direction of the rotating shaft 14 .

In this case, one magnet is fixed and the other magnet is rotatable, and the polarity relationship between the two magnets is such that when they have the same polarity, they are turned on, and when they have different polarities, they are turned off.

Therefore, the rotation angle of the rotating magnet is 180°.

In the figure, 11 is a magnetic pole, 12 is a polarization plate, and 14 is a rotating shaft.

The one shown in Fig. 4 has magnets 23a and 23b arranged vertically in order to double the attraction force.
ON-FF operation is performed by rotating b by 180°.

In this case, since the lower magnet is closer to the attracted object, the magnetic polarity when turned off is opposite to the polarity when turned on, which has the advantage of improving the ability to remove the attracted object.

In the figure, 21 is a magnetic pole, 22 is a polarization plate, and 24 is a rotating shaft.

In the case of the above-mentioned three conventional examples, all have the disadvantage that magnetic force of the same strength is generated on the upper surface as well as the lower surface which serves as the attracting surface, and it is necessary to consider adopting a non-magnetic cover in some cases.

In addition, when considering a magnet device with a lifting ability by increasing the area of the lifting chuck, there is a drawback that as the number of magnets increases, gears for interlocking are required and complexity increases.

The present invention has been devised to improve the drawbacks of the conventional permanent magnet devices described above, and embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 is a front view thereof, where 31 is a magnetic pole and 33 is a permanent magnet.

In the present invention, two or more permanent magnets 33 are arranged in pairs with circular holes 35a and 35b arranged laterally.

Among the pair of permanent magnets, one magnet 33 b is fixed, and the other magnet 33 a is rotatably installed around a rotating shaft 34 .

On the other hand, the magnetic pole 31 is divided by a polarization plate 32b provided between circular holes 35a and 35b.

The polarization plate 32b is located at a position connecting the circular holes 35a and 35b.

Furthermore, polarization plates 32a and 32a are provided between the circular holes 35a and 35b and the lower surface, and the magnetic pole 31 is
and 31b.

Note that the polarization plates 32a, 32a are located in circular holes 35a, 35.
The position is offset by 7 of the width of the permanent magnet to the outside of the bottom end of b.

In the above configuration, if the rotatable magnet 33a is rotated so that it has a different polarity from the magnet 33b, the two magnets become short-circuited and no magnetism appears on the bottom surface.

This turns it off. magnet 33a
If it is rotated by 180 degrees so that it has the same polarity as that of b, the lower surface becomes the polarization plate 32a.

32a, the center is, for example, an S pole, and both ends are N poles guided from above the magnet.

This turns it into an ON state.

At this time, no magnetic force is generated on the top surface. In addition, in the above-mentioned embodiment, there is a problem that residual magnetism makes it difficult for the attracted object to come off when the device is turned off.

To prevent this, either make the fixed magnet 33b a little weaker than the rotating magnet 33a, or
It is best to adjust it so that it gives the same effect as turning b slightly to the right in the figure to substantially weaken it.

Next, FIG. 6 shows another embodiment.

In this embodiment, the magnetic pole 41 has four circular holes 4 on the top, bottom, left and right.
5 a, 45 b, 45 C, 45 d, and four permanent magnets 43 a, 43 b, 43 C
, 43d are provided.

The upper magnets 43b and 43d are arranged laterally so that the same polarity faces each other, and the lower magnets 43a and 43
C are rotatably attached by rotating shafts 44a and 44C, respectively.

Gears 46a and 46C are fixed to the rotating shafts 44a and 44C, respectively, and a gear 46 that meshes with the gears 46a and 46C is provided in the middle of these gears.

A rotating shaft 47 is fixed to this gear 46, and a bundle (not shown) is directly connected thereto.

On the other hand, polarization plates 42a are provided between the circular holes 45a and 45C and the lower surface and between the upper and lower circular holes, and
A polarization plate 42b is also provided between the polarization plate 42b and 45a.

As a result, the magnetic pole 41 has an outer magnetic pole 41 a and an inner magnetic pole 41
It is divided as b.

Note that the positions of the polarizing plates 42a and 42b are such that, contrary to the embodiment shown in FIG.
is independent of eccentric position.

In the above configuration, the upper magnet 43b.

If 43d has the S pole facing the internal magnetic pole 41b side, and if the rotating shaft 47 makes the internal magnetic pole 41b side of the lower magnets 43a and 43C the N pole, then a short circuit will occur between the upper and lower magnets. Two sets of magnetic circuits are formed and are in the OFF state.

On the other hand, if the magnets 43a and 43C are rotated by 180 degrees and the internal magnetic pole 41b side is set to the S pole, the magnets are turned on.

In this case, the inner magnetic pole 41b becomes the S pole and the outer magnetic pole 41a becomes the N pole, so that N-5-N poles are generated on the lower surface.

At this time, no magnetic force is generated on the top surface.

In the above configuration, the polarity of the rotating magnets 43a, 43C whose OFF state is closer to the attraction surface acts more strongly, so that there is a tendency for reverse excitation and the peelability is improved.

As explained above, according to the lifting permanent magnet device of the present invention, it is sufficient to rotate only one of the pair of magnets, so the rotating mechanism can be simplified.

Further, there is an effect that magnetic force is not generated on the upper surface other than the attracting surface.

[Brief explanation of drawings]

Fig. 1 is a front view showing an example of a conventional magnet device, Fig. 2 is an explanatory drawing showing the shape of the magnet, Fig. 3 is an explanatory drawing of another embodiment, and Fig. 4 is an illustration of still another embodiment. FIG. 5 is a front view showing one embodiment of the magnet device according to the present invention, and FIG. 6 is a front view of another embodiment. 31...Magnetic pole, 32...Polarization plate, 33
...Permanent magnet, 34 ... Rotating shaft, 35
......Circular hole, 41...Magnetic pole, 42...
... Polarization plate, 43 ... Permanent magnet, 44 ...
... Rotating shaft, 45 ... Circular hole, 46 ...
...gear, 47...shaft.

Claims (1)

[Claims for Utility Model Registration] 1. A magnetic pole body, at least one permanent magnet fixed to the magnetic pole body, and a magnet that is paired with the fixed permanent magnet and performs ON-OFF switching by rotating 180°. A permanent magnet device for suspension, characterized in that it has one rotatable permanent magnet and a polarization plate that appropriately blocks the magnetic pole body so that the main attracting surface is only the bottom surface of the magnetic pole body. 2. Scope of Utility Model Registration Claim 1, in which a fixed permanent magnet and a rotatable magnet are arranged in two stages in the vertical direction, and a plurality of sets of the fixed permanent magnet and the rotatable permanent magnet are arranged in the horizontal direction. The permanent magnet device for lifting described in .