JPS6315404A - Magnetic attracter - Google Patents

Abstract

PURPOSE:To constitute a cylindrical magnet easily even when it has a large size, and to prevent flux concentration easily by using the cylindrical magnet by charging a thin cylindrical pipe with a permanent magnet block. CONSTITUTION:A rectangular parallelopiped unit magnet having the same shape is used as permanent magnets 5a, 5b in contents in a thin cylindrical pipe 1, and the permanent magnets 5a, 5b are charged vertically symmetrically, holding a soft iron block 4a. Unit magnets 5c of another kind are inserted into the clearances of these unit magnets, and soft iron blocks 4b-4d are charged into residual clearance sections. Consequently, the corner sections of the unit magnets are inscribed directly with the pipe 1 and the apices of the soft iron blocks 4a, 4d are inscribed with the pipe 1 in the contents of the pipe 1, the contents of the pipe 1 are unified and fixed to the pipe 1, thus acquiring an integral permanent magnet. Accordingly, magnetic flux concentrates to contacts among the unit magnets and the soft iron blocks and the pipe 1 when the pipe 1 has magnetism, but it does not concentrate to one point, and the degree of the concentration of magnetic flux is further lowered when the pipe 1 has non-magnetism.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic adsorption VT device using a permanent magnet, and particularly to one using a cylindrical magnet.

(Prior Art) For example, in a magnetic attraction vR device called a magnet base or a lid, a cylindrical magnet is rotatably supported and used as an ON, 0FFI, and 7J switching element. To mold this cylindrical magnet, a method of magnetic field pressing using a mold is generally used.

(Problems to be Solved by the Invention) This l1tl field pressing method is suitable when the cylindrical magnet is small and mass-produced, but it is problematic when the cylindrical magnet is large or is produced in bulk. There are many.

That is, in these cases, there is a problem in manufacturing the mold.

On the other hand, forming a permanent magnet into a cylindrical shape? il + polished 2
There are problems in terms of both efficiency and cost.

Furthermore, even if a large cylindrical magnet is manufactured, there is another problem in that the force required by the f'lET: mouth is too large in order to rotate the cylindrical magnet inserted into the magnetic absorber. This occurs as a result of the concentration of magnetic flux in the case of a magnet with a large cross-section and a large reversible permeability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a permanent magnetic attraction device having a cylindrical magnet that is easy to manufacture and configured so that magnetic flux is not concentrated too much.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a cylindrical magnet is constructed by loading a permanent [41-stone block] into a thin-walled cylindrical pipe. The pipe can be either magnetic or non-magnetic.

(Function) The permanent magnet blocks inside the pipe cooperate with each other and operate as one permanent magnet. Then, the magnetic flux generated by this one permanent magnet is extracted through the pipe. If the pipe is non-magnetic, no concentration of magnetic flux will occur regardless of the configuration of the permanent magnets, so the force required to operate fIJ will be reduced. Furthermore, when the pipe is magnetic, the rotational operation force is greater than that of a non-magnetic pipe, but the magnetic loss is reduced.

(Embodiment) FIGS. 1(a) and 1(b) show a cylindrical magnet portion in an embodiment of the present invention, in which 1 is a thin-walled cylindrical pipe, and each end thereof has a rotor flange 2a. , 2b are provided, and rotor flange shafts 3a, 3b are attached to these rotor flanges 2a, 2b. The space inside this pipe 1 is made up of soft iron blocks 48 to 4d.
and filled with permanent magnets 5a to 5C. The contents in the pipe 1 are fixed to the rotor flanges 2a, 2b by rotor assembly bolts 6a, and the rotor flanges 2a, 2b are fixed to the pipe 1 by screws 6b. Note that 7 is a pin hole for attaching a handle (not shown) to the rotor flange shaft 3a.

Although FIGS. 1(a) and 1(b) only show the upper half of the contents contained in the pipe 1, the lower half is symmetrical to this. In the contents inside the pipe 1, a permanent magnet 5a,
5b uses rectangular parallelepiped unit magnets having basically the same shape.

These unit magnets 5a.

5b are charged vertically symmetrically with the soft iron block 4a in between. Then, another type of unit magnet 5C is inserted into the gap between these unit magnets. These intermediate magnets 58 to 5C are used as commercially available ones without any processing as much as possible.

Soft iron blocks 4b, 4c, and 4d are inserted into the gaps that remain after loading these unit magnets. These blocks 4
For b to 4d, those having a triangular cross-sectional shape are used.

As a result, the contents of the pipe 1 may be such that the corner of the medium magnet is directly inscribed in the pipe 1 or the soft iron block 4a.

The apex of 4d is inscribed in the pipe 1, so that it is fixed integrally with the pipe 1.

By obtaining such a fixed relationship between the pipe 1 and the object contained in the pipe 1, an integral permanent magnet can be obtained.

The magnetic flux distribution state of this permanent magnet differs depending on whether the pipe 1 is magnetic or non-magnetic, but basically it is a cylindrical magnet in which the magnetic flux is not concentrated in one part. In other words, if the pipe 1 is magnetic, magnetic flux will be concentrated at the contact point between the unit magnet and the soft iron block and the pipe 1, but it will not be concentrated at one point, and if the pipe 1 is non-magnetic, the degree of magnetic flux concentration will be lower. Become. If a permanent magnet with low reversible magnetic permeability, such as a ferrite magnet, is used, concentration of magnetic flux will not occur in the first place. Next to ferrite magnets are rare earth magnets.

FIGS. 2 to 4 each show an embodiment of the present invention. On the other hand, FIGS. 2 and 4 show an embodiment constructed as a beam lid, and FIG. 3 shows an embodiment constructed as a base. In each of these figures, numbers ending in 1 indicate pipes, numbers ending in 4 indicate soft iron blocks, and numbers ending in 5 indicate permanent magnets.

First, in the lid of FIG. 2, cylindrical magnets are constructed by providing permanent magnets 15a to 15C in pairs in a pipe 11 with a soft iron block 14 in between. This cylindrical magnet is housed in a cylindrical hole provided at the center of a pair of 161416° 17 with a permanent magnet 15d and a polarizing material 18 sandwiched between them.

With this configuration, the cylindrical magnet is rotated so that the N pole and S pole of each permanent magnet are applied to each magnetic pole 16.17, and the cylindrical magnet is in the ON state, and the magnetic flux generated by the cylindrical magnet is transferred to the permanent magnet 15d.
The cylindrical magnet is rotated so that the generated 11 fluxes cancel out the OFF state.

Next, FIG. 3 shows a permanent magnet 25 whose cross section is approximately bisecting.
A cylindrical magnet is constructed by inserting four magnets A into a pipe 21 with a soft iron block 24 sandwiched therebetween. This cylindrical magnet is provided together with the permanent magnet 15b1 and the polarization material 27 at the center of the pair of magnetic poles 26.26.

Furthermore, FIG. 4 shows a pair of rectangular parallelepiped permanent magnets 35a, 3.
Magnetic poles 3 that form part of a cylinder on both sides of 5a are superimposed on each other.
4 and inserted into the pipe 31 to form a cylindrical magnet. This cylindrical magnet is provided at the center of a magnetic circuit between permanent magnets 35b, 35c and a pair of magnetic poles 36, 37 and 38 with a polarizing material 39b interposed therebetween. 39a is a polarizing material between the magnetic poles 38 and 38.

In FIGS. 3 and 4, the cylindrical magnet is rotated to switch ON and OFF in the same way as in FIG. 2.

FIGS. 5(a), (b), and (c) show other configuration examples of the objects contained in the pipe in a cylindrical magnet, and since I=6, in each case, only a permanent magnet is placed in the pipe 41, 51 or 61. It is loaded. The figure (a) shows four types of rectangular parallelepiped permanent magnets 45a.
45d, Figure (b) shows three types of permanent magnets 55a to 55c with trapezoidal cross sections, and Figure (C) shows a rectangular parallelepiped and rectangular parallelepiped permanent magnets 65a, 65b with a cylindrical peripheral surface. The cases in which permanent magnets 65G are combined are shown.

〔Effect of the invention〕

As described above, the present invention uses a cylindrical magnet constructed by loading a permanent magnet block inside a thin-walled cylindrical pipe to construct a magnetic absorber. It is very useful in that it can be used as a magnet.
Further, even if the size is increased, concentration of magnetic flux can be easily prevented, so the turning operation force can be kept small.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are partial cross-sectional views and partial cross-sectional views of a cylindrical magnet portion according to an embodiment of the present invention, and FIGS. Explanatory drawings showing examples, FIG. 5 (Q), (b), (c)
FIG. 2 is an explanatory diagram showing another example of the configuration of a cylindrical magnet. 1.11, 21.31.41, 51.61... Pipe, 2... Rotor flange, 3... Rotor flange shaft, 4.14, 24.34... Soft iron block, 5.15
．． 25.35.45, 55.65...Permanent magnet, 16
．． 17, 26.36, 37.38...magnetic pole, 18.2
7.39...Polarized material.

Claims (1)

[Claims] 1. A first permanent magnet having large residual magnetism and coercive force is fixed between a pair of magnetic pole members, and a second permanent magnet having the same magnetic properties is rotatably provided, By rotating the second permanent magnet, the magnetic fluxes of the first and second permanent magnets act on the magnetic pole member in the same direction to bring it into an attracted state, and further rotating the second permanent magnet. In the magnetic attraction device, the magnetic fluxes of the first and second permanent magnets act in opposite directions on the magnetic pole member to bring it into a non-adsorption state, wherein the second permanent magnet is placed in a thin-walled cylindrical pipe. A magnetic adsorption device loaded with permanent magnet blocks. 2. The device according to claim 1, wherein the second permanent magnet is a magnetic attraction device in which a soft iron block is loaded in a thin cylindrical pipe in addition to a permanent magnet block. 3. The magnetic attraction device according to claim 1, wherein the pipe is non-magnetic. 4. The magnetic attraction device according to claim 1, wherein the pipe is magnetic.