JP3396466B2 - Magnetic attractor using neodymium magnet - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to neodymium (Nd).
The present invention relates to a magnetic attraction device using a magnet, more specifically, to prevent oxidation of a neodymium magnet and improve its performance and durability.

[0002]

2. Description of the Related Art A magnetic attraction device is used for lifting or moving mechanical parts made mainly of iron at industrial sites by switching the direction in which a magnetic force acts, that is, by turning on and off the attraction force. It is a device used.

In the structure of a general magnetic attraction device, a plurality of magnetic members (magnetic pole members) are arranged at regular intervals, spacers are arranged between adjacent magnetic members, and side plates are provided on both sides.
The upper part is covered with a cover plate having a retaining ring.

The magnetic member forms a flat plate member as a whole with a rod-shaped non-magnetic member interposed in the center thereof.
A rotor unit including permanent magnets attached in a divided state is installed between adjacent flat plate members, and the magnetic pole direction of the permanent magnets is switched by rotating the rotor unit by lever operation. Has been made possible.

A shaft hole is formed in the center of the rotor unit, and the rotary shaft is inserted through the shaft hole and the flat plate member. The rotor unit is rotatably connected to the rotating shaft, and a lever for rotating operation is connected to one end of the rotating shaft. Since the attraction force is turned on / off according to the position of this lever, it is possible to prevent the rotor unit from rotating in the direction of loss of attraction force, especially when the object to be lifted is attracted. Lever locking means are provided for prevention.

Therefore, when the lever is rotated, the direction of the magnetic poles of the permanent magnets arranged in the rotor unit in a divided state is switched, whereby the polarities of the magnetic force lines are converted. At this time, when the polarities of the permanent magnets attached to the rotor unit are different from each other on the magnetic member divided into two by the non-magnetic member, the magnetic attraction force is lost. Further, when the direction of the rotor unit is switched again and the same polarities of the permanent magnets attached to the rotor unit are located on the magnetic member, the magnetic lines of force act to the outside, and An object located below the member can be attracted with a strong magnetic force. As a result, it is well known that a target object such as an iron plate can be attracted and moved.

Ferrite magnets are mainly used as permanent magnets of conventional magnetic attraction devices. The magnetic flux density of this ferrite magnet is less than 2000 gauss.

Therefore, in order to improve the adsorption performance of the conventional magnetic attraction device, the volume of the ferrite magnet had to be relatively increased. When the volume of the magnet is increased as described above, the volume of the body of the magnetic attraction device must be relatively increased, which is not only inconvenient to use but also causes a rise in manufacturing cost.

In order to solve such a problem, it is considered to use a neodymium magnet having a magnetic flux density in the range of 10,000 to 13,000 gauss to improve the performance of the magnetic attraction device. However, neodymium magnets are very easily oxidized, and therefore, when they are exposed to the atmosphere, they are easily corroded by oxygen in the atmosphere, and the magnetic force performance sharply deteriorates.

Therefore, it is conceivable to form a surface antioxidation coating on the neodymium magnet with resin or metal. However, since the neodymium magnet attached to the rotor unit of the magnetic attraction unit is rotated at any time while being in sliding contact with the magnetic member, the neodymium magnet is attached to the rotor unit of the magnetic attraction unit while being coated with the antioxidant film. If it is used, there is a problem that the antioxidant coating is easily peeled off due to the friction generated during the rotation. Therefore, it was impossible to use the neodymium magnet coated with the antioxidant coating.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to configure a permanent magnet attached to a rotor unit with a neodymium magnet having an excellent coercive force and prevent the neodymium magnet from being oxidized. An object is to provide a magnetic attraction device that is made possible.

Another object of the present invention is to make the direction switching operation of the rotor unit for turning on and off the attraction force smoother and to improve the commercialability and reliability of the product. To provide an adsorber.

[0013]

In order to achieve the above object, the first aspect of the magnetic attraction device of the present invention is a non-magnetic member arranged in the center and magnetic members arranged on both sides thereof. A pair of flat plate-shaped members that are arranged to face each other, a cylindrical rotor unit that is rotatably supported between the flat plate-shaped members, and different magnetic poles that face the rotor unit. At least one pair of neodymium magnets attached so as to face both flat plate-shaped members, and a magnetic attraction device that switches the direction of the magnetic force lines of the neodymium magnet with respect to the magnetic member by rotating the rotor unit. A sealed space provided around the magnet to prevent contact between the neodymium magnet and oxygen in the atmosphere, and an oxidation preventing means for maintaining the sealed space in a vacuum state to prevent oxidation, or filling the sealed space. It The antioxidant substances oil, characterized in that it comprises an oxidation preventing means for an oxidation preventing state the sealed space portion

According to the magnetic attraction device of the present invention having the above-mentioned structure, since the sealed space portion is provided around the neodymium magnet and the sealed space portion can be prevented from being oxidized, the neodymium magnet and oxygen in the atmosphere can be prevented. The contact can be blocked to prevent oxidation of the neodymium magnet.

In order to bring the sealed space into an oxidation preventing state, the oxidation preventing means may maintain the sealed space in a vacuum, and the closed space is filled with an oily antioxidant substance. It may be.

The closed space portion is, for example, a spacer which is disposed between both flat plate-like members and surrounds the lower and lateral sides of the rotor unit and has an opening portion above, and a cap member which closes the opening portion of the spacer. Can be advantageously constructed.

The magnetic adsorption device of the present invention having the above-mentioned structure is equipped with an anti-oxidizing means and an applying means for applying an anti-oxidizing substance to the surface of the neodymium magnet facing the flat plate-like member. A more excellent effect can be obtained in order to prevent it.

Therefore, the magnetic adsorption device of the present invention having the above-described structure is composed of a hole portion formed in the flat member at a position facing the neodymium magnet, and an oily antioxidant substance filled in the hole portion. , When the rotor unit rotates,
A first coating means is provided for coating the surface of the neodymium magnet attached to the rotor unit, the surface facing the flat plate-shaped member with the antioxidant. Alternatively, the groove is formed along the surface of the neodymium magnet housed in the rotor unit, and an oily antioxidant substance filled in the groove, and when the rotor unit rotates, it does not rotate. Along with this, the antioxidizing substance is caused to flow out from the groove portion, and the antioxidizing substance is provided on a surface of the neodymium magnet attached to the rotor unit, the surface facing the flat plate member. Good.

In a second aspect of the magnetic attraction device of the present invention, a pair of magnetic members are arranged to face each other with a predetermined gap, and the magnetic members are provided on the facing surfaces of both magnetic members along the length direction. And a pair of neodymium magnets having a semi-circular shape in cross-section attached to the flat non-magnetic member and facing different magnetic poles sandwiching the flat non-magnetic member. A cylindrical rotor unit housed in a recess and rotatably arranged between both magnetic members, and a magnetic attraction device that switches the direction of magnetic lines of force of a neodymium magnet with respect to a magnetic member by rotating the rotor unit. There is a sealed space formed around the neodymium magnet, an antioxidant means for maintaining the sealed space in a vacuum state to prevent oxidation, or an oily antioxidant substance filled in the sealed space. Prevents the enclosed space from oxidizing Characterized in that it comprises an oxidation preventing means for the state.

According to the magnetic attraction device of the present invention having the above structure, as in the case of the first aspect, the sealed space is provided around the neodymium magnet so that the sealed space can be prevented from being oxidized. It is possible to prevent contact between the neodymium magnet and oxygen in the atmosphere and prevent oxidation of the neodymium magnet.

In order to bring the sealed space into an oxidation prevention state, the oxidation preventing means may maintain the sealed space including a gap formed between the neodymium magnet and the magnetic member in a vacuum. Of course, the closed space portion including the gap formed between the neodymium magnet and the magnetic member may be filled with an oily antioxidant substance.

The closed space is composed of, for example, the pair of magnetic members, a spacer arranged between the magnetic members to close the lower part of the rotor unit, and both magnetic members above the rotor unit. By including a cap member that closes the gap, it can be advantageously configured.

In the magnetic adsorption device according to each aspect of the present invention, the cap member is provided with an injection hole for injecting an oily antioxidant into the closed space, and the injection hole is provided in the closed space. By providing a check valve that allows injection of the antioxidant, the antioxidant substance can be easily injected and filled into the sealed space.

Further, in the magnetic adsorption device according to each aspect of the present invention, the oily antioxidant is used to prevent oxidation of the neodymium magnet and to smooth the rotation operation of the rotor unit. Alternatively, it is preferable to include any one of the colloidal oils.

According to the magnetic adsorption device of the present invention in each of the above aspects, it is possible to prevent the neodymium magnet from being oxidized.
Very excellent product durability and performance can be obtained, and the operability, reliability and commercialability of the product can be improved.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of the configuration of the first embodiment of the magnetic attraction device of the present invention. FIG. 2 is a vertical cross-sectional view of the magnetic attraction device shown in FIG. 1, in which rotor units are respectively installed between adjacent flat plate-shaped members, and a rotary shaft, a rotor unit, and a neodymium magnet are operated by operating a lever. The structure installed so that rotation is possible is shown. 3A is a cross-sectional view of the magnetic attraction device shown in FIG. 2 as seen from the lateral direction, and FIG. 3B is seen from the same direction as FIG. 3A of the magnetic attraction device of the second embodiment. FIG. 3 is a cross-sectional view showing a state in which a sealed space formed around the rotor unit is filled with an antioxidant substance as an antioxidant unit for the neodymium magnet. FIG. 4 is an exploded perspective view showing an installation structure of spacers and rotor units arranged between adjacent flat plate members in the third embodiment of the magnetic attraction device of the present invention. FIG. 5 shows a state in which a cap member is installed in the opening above the spacer in the modification of the embodiment of FIG. 4, and an oily antioxidant substance as an antioxidant means can be supplied from the outside to the cap member. Is shown. FIG. 6 is a vertical cross-sectional view of an assembled state of the magnetic attraction device shown in FIG. FIG. 7 is a vertical cross-sectional view showing a fourth embodiment of the magnetic attraction device of the present invention, in which not only the circumferential direction of the rotor unit but also the front and rear sides thereof are filled with an antioxidant substance, Each time the unit is rotationally operated, the antioxidant substance is applied to the contact surface of the neodymium magnet with the flat plate-shaped member to further increase the surface antioxidation effect of the neodymium magnet housed in the rotor unit. The structure of the adsorption device is shown. 8A to 8
(C) is a perspective view showing an embodiment in which the coating means is formed along the surface of the neodymium magnet housed in the rotor unit. FIG. 9 is an essential part enlarged cross-sectional view showing an embodiment in which a coating means is formed on a portion of the neodymium magnet housed in the rotor unit, which is chamfered along the surface thereof. FIG. 10 is an enlarged cross-sectional view of an essential part showing an embodiment in which a rotor unit accommodating a neodymium magnet is chamfered along the surface of the neodymium magnet, and a coating means is formed at that portion. FIG. 11 is a fifth embodiment of the magnetic attraction device of the present invention, in which a pair of neodymium magnets attached by sandwiching a plate-shaped non-magnetic member forms one rod-shaped rotor unit, It shows a structure in which an oxidation preventing means is formed around it. FIG. 12 is a perspective view of the rotor unit shown in FIG. FIG. 13 is an enlarged cross-sectional view of part A of FIG. In the present invention, as shown in FIG. 1, the magnetic member 10 rotates the permanent magnet 40 arranged such that the N and S poles face each other to switch the action direction of the magnetic force line to the magnetic member 10. , It functions as an adsorption plate that obtains or loses adsorption force.
As a result, the magnetic adsorption device of the present invention mainly adsorbs an object having an iron component located on the bottom surface and lifts or moves it to a predetermined position.

The magnetic member 10 is a flat plate member 10a having a constant thickness as a whole, with a non-magnetic member 11 attached by welding in the center of the magnetic member 10 in order to divide the magnetic poles on both sides. The flat plate member 10 is formed.
The number a of a is set differently according to the mode of the adsorption capacity, and is arranged at a constant interval.

A spacer 20 for maintaining the space is provided between the plurality of adjacent flat plate members 10a, and the spacer 20 maintains the space and the space between the adjacent flat plate members 10a is maintained. It has the function of closing the lower gap.

A lid plate 30 is installed on the upper portions of the plurality of flat plate-shaped members 10a and the plurality of spacers 20, and side plates 80 are arranged on the side surfaces of the plurality of spacers 20 to seal the inside. The lid plate 30 includes a retaining ring 31 on the upper surface,
It is firmly fixed to the flat plate member 10a mainly by a plurality of bolts 32, so that the retaining ring 31 can be lifted or moved while being engaged with the hook of the hoist.

On the other hand, a pair of neodymium magnets 40 are axially supported between the adjacent flat plate members 10a so that the N and S poles face each other. This neodymium magnet 40 is
It is divided by the rotor unit 50 and is attached so as to be rotatable with the rotor unit 50. Also,
A pair of fixed magnets 13 is arranged on both sides of the rotor unit 50.

The lever 6 exposed to the outside of the body
When the user operates 0 to rotate the rotor unit 50 and the neodymium magnet 40 attached to the rotor unit 50,
The magnetic pole direction of the neodymium magnet 40 with respect to the magnetic member 10 is switched. As a result, the attraction force of the magnetic members 10 divided on both sides by the non-magnetic member 11 is turned on / off, and the object is attracted at the position where the attraction force is turned on, and a tool such as a hoist is attached. It can be used to lift or move it into position.

On the other hand, in the present invention, it is most important that the neodymium magnet 40 is provided with an antioxidation means 70 around the neodymium magnet 40 for blocking contact between oxygen in the atmosphere and the neodymium magnet 40.

That is, the magnetic attraction device of the present invention is 10,000
The neodymium magnet 40 having a high magnetic flux density of 0 Gauss or more is used. The neodymium magnet 40 has excellent performance, but when it comes into contact with oxygen in the atmosphere, corrosion and rapid oxidation progress. Since its performance and durability will be reduced, in order to prevent this, the antioxidant 7
It is equipped with 0.

As the oxidation preventing means 70, a closed space S is provided around the rotor unit 50 and the neodymium magnet 40.
Is provided to shut off from the atmosphere to maintain a vacuum atmosphere in the closed space S, and a method for maintaining a closed atmosphere in the closed space S such as a colloidal oil such as grease that has good lubricity and can shut off oxygen in the air. There is a method of installing such an oily antioxidant substance, but in consideration of lubricity, manufacturability, cost, etc. for smooth operation during operation of the rotor unit 50 and the neodymium magnet 40, a colloid such as grease is considered. Most preferably, oil is used.

As described above, according to the present invention, an oil layer is formed around the neodymium magnet 40 having a high magnetic flux density of 10,000 Gauss or more by using a colloidal oil or the like, so that contact with the outside air can be prevented. Since the neodymium magnet 40 can be blocked, the neodymium magnet 40 is prevented from being oxidized, and a high attractive magnetic force can be constantly generated. Also, neodymium magnet 4
By using 0, the performance of the magnetic attractor can be improved and the overall volume and weight can be minimized.

On the other hand, in order to install the oxidation prevention means 70, as shown in FIGS. 4 and 5, the rotor unit 5 is surrounded by surrounding the lower side and the side of the cylindrical rotor unit 50.
It is advantageous to employ a spacer 20 with openings only above 0. With the above configuration, the rotor unit 5
A closed space S can be formed around 0, and the closed space S can be filled with an antioxidant substance 71 such as colloidal oil and stored.

In the structure shown in FIG. 4, as shown in FIG. 5, the cap member 2 is provided in the opening above the spacer 20.
1 can be attached by using a bolt or the like so that the opening is covered to form a closed space S surrounding the rotor unit 50. This cap member 21
An injection hole 22 is formed in the injection hole 22. The injection hole 22 is blocked from below by a ball 24 urged by a spring 23, and the injection hole 22 is glued to the injection hole 22 with a pressure higher than the urging force of the spring 23. A check valve is provided so that the colloidal oil or the like can be injected into the closed space S by injecting oil or the like. By doing so, the antioxidant substance 71 such as colloidal oil can be easily injected into the sealed space S around the rotor unit 50 and the neodymium magnet 40, and can be filled at any time.
The spacer 20 has a plurality of pins 25 in the pin hole 1.
By being inserted in Nos. 5 and 26, the flat member 10a is coupled to each other.

The rotor unit 50 functions to switch the position of the neodymium magnet 40 attached to the rotor unit 50 by operating the lever 60 exposed to the outside of the body, and to switch the magnetic pole direction with respect to the magnetic member 10. In the examples shown in FIGS. 1 to 10, the neodymium magnet 40 is housed in the cylindrical rotor unit 50.

That is, the rotor unit 50 shown in FIGS. 1 to 10 is made of a synthetic resin material which is a non-magnetic material.
A magnet accommodating groove 51 is formed so that the pair of neodymium magnets 40 can be accommodated with different magnetic poles facing each other, and a shaft hole 52 is formed in the shape of a square or an elongated hole in the center. The rotor unit 50 is engaged with the rotary shaft 61 penetrating the shaft hole 52 and the shaft passage hole 12 of the magnetic member 10, and is coupled to the end portion side of the rotary shaft 61 and has a lever 60 having a knob function. The attraction force of the magnetic member 10 is turned on / off according to the position of.

At this time, in the state where the object to be lifted is adsorbed, the rotor unit 5 is moved in the direction in which the adsorption force is lost.
Lever lock means 9 for preventing 0 from rotating
0 is provided. When the lever 60 is in the on-state of the suction device, the locking means 90 is such that the locking metal 91 urged by the spring is projected, and the lever 60 is locked with the locking projection 92 which can be retracted and retracted. The purpose of the present invention is to prevent the lever 60 from being inadvertently returned to the off state during use of the magnetic attraction device.

A non-magnetic packing 35 is interposed between the cover plate 30 and the flat plate member 10a.

Hereinafter, each embodiment of the oxidation preventing means 70 and the rotor unit 50 of the present invention will be described more specifically.

FIG. 2 shows a structure in which two flat plate-shaped members 10a are connected to each other.
The individual spacers 20 are disposed, and the closed space S formed as a space surrounded by the spacer 20, the flat plate-shaped member 10a, the fixed magnet 13, and the packing 35 around the cylindrical rotor unit 50 is prevented from oxidation. Colloidal oil 71 as means 70
2 shows an embodiment in which is filled.

The rotary shaft 61 is inserted through the shaft hole 52 formed in the center of the rotor unit 50 and the shaft passage hole 12 of the flat plate member 10a. The rotary shaft 61 is pivotally supported at the center of the flat plate-shaped member 10a, and at the end portion penetrating to the outside,
A lever 60 having a picking function is combined, and this lever 6
The adsorption force is turned on / off according to the position of 0.

3 (a) and 3 (b) are transverse sectional views shown from the side direction of FIG. In FIG. 3A, the oxidation preventing means 70 is provided in a closed space S formed as a space surrounded by the spacer 20, the flat plate-shaped member 10 a, the fixed magnet 13, and the packing 35 around the cylindrical rotor unit 50.
Is filled with the colloidal oil 71 and is blocked from the outside so that oxygen in the atmosphere does not come into contact with the surroundings of the neodymium magnet 40.

In FIG. 3B, the cylindrical rotor unit 50 is oxidized into a closed space S formed as a space surrounded by the spacer 20, the flat plate-shaped member 10a, the cover plate 30, and the side plate 80 around the rotor unit 50. Colloidal oil 71 as a prevention means 70 is filled, and oxygen in the atmosphere is blocked from the outside so as not to come into contact with the surroundings of the neodymium magnet 40. Here, the spacer 20
Are attached to the lower part of the side plate 80 from the left and right with bolts. Further, a plurality of blades 55 are projected in a constant gap on the outer peripheral portion of the rotor unit 50 so that the neodymium magnet 40 and the colloidal oil 71 around the rotor unit 50 are mixed well.

On the other hand, in FIGS. 5 and 6, a pair of flat plate-shaped members 10a are provided around the rotor unit 50 as described above.
And a spacer 20 which is disposed between the flat plate-shaped members 10a and 10a and surrounds the lower and lateral sides of the cylindrical rotor unit 50 and has an opening only above the rotor unit 50. The closed space S formed as a space surrounded by the cap member 21 attached to the upper opening is filled with the colloidal oil 71 as the antioxidant 70. Further, a small hole 73 is formed at a position (a locus position around which the neodymium magnet 40 is rotated) facing the neodymium magnet 40 of the non-magnetic member 11 forming the flat plate member 10a, and the oxidation preventing means is also provided in the hole 73. Colloidal oil 71 as 70 is filled.

In the configuration shown in FIGS. 5 and 6, when the neodymium magnet 40 rotates together with the rotor unit 50, the colloidal oil 71 is continuously applied to the surface of the neodymium magnet 40 by the hole 73. Therefore, even if the neodymium magnet 40 is continuously rotated by the rotating operation of the lever 60, the colloidal oil 71 is always in contact with and applied to the surface thereof, so that the performance and durability of the neodymium magnet 40 can be further extended. .

In the embodiment shown in FIG. 7, a pair of flat plate-shaped members 10a and a flat plate-shaped member 10 are provided around the rotor unit 50.
a and a spacer 20 disposed between a and 10a, and a cover plate 30.
A closed space S formed as a space surrounded by and is filled with a colloidal oil 71 as an antioxidant 70. Further, the flat plate-shaped members 10a on both front and rear sides of the rotor unit 50
A groove portion 72 is formed in a portion opposed to the groove portion 72, and the groove oil 72 is also filled with the colloidal oil 71. According to the magnetic attraction device having this configuration, the colloidal oil 71 in the groove 72 is formed on the surface of the neodymium magnet 40 (shown by an imaginary line in FIG. 7) facing the flat plate member 10a every time the rotor unit 50 is rotated. Applied
The surface oxidation prevention effect of the neodymium magnet 40 housed in the rotor unit 50 can be further increased.

8 (a) to 8 (c) are coating means for coating the surface of the neodymium magnet 40 facing the flat plate member 10a with an antioxidant to assist the antioxidant 70 of the present invention. As an example, each embodiment will be illustrated with respect to the shape and position of the groove 72 formed along the surface of the neodymium magnet 40 housed in the rotor unit 50.

In the embodiment shown in FIGS. 8 (a) to 8 (c), along the boundary of the neodymium magnet 40 housed in the rotor unit 50, the groove 72 formed all around the neodymium magnet 40 is formed. The anti-oxidation means 70 is filled with the colloidal oil 71.

FIG. 8A shows the case where the end surface of the rotor unit 50 and the end surface of the neodymium magnet 40 are in the same plane.
8B shows a case where the end surface of the rotor unit 50 is formed lower than the other portions between the pair of neodymium magnets 40 housed in the rotor unit 50, and FIG. The case where the end surface of the rotor unit 50 is formed lower than the other portions around the pair of accommodated neodymium magnets 40 is shown. And in any case,
The groove 72 filled with the colloidal oil 71 is formed in the rotor unit 50.
Is formed over the entire circumference of the neodymium magnet 40 along the boundary of the neodymium magnet 40 housed in.

By doing so, when the rotor unit 50 and the neodymium magnet 40 housed therein rotate, the colloidal oil 71 filled in the groove 72 as the rotor unit 50 rotates.
Flows out and is continuously applied to the surface of the neodymium magnet 40 facing the flat plate member 10a continuously, so that oxidation due to contact between the neodymium magnet 40 and oxygen in the atmosphere can be prevented in advance. Further excellent antioxidant effect can be obtained.

By making the groove portion 72 coexist with the closed space portion S, a further excellent antioxidation effect can be obtained.

9 and 10, the end face of the rotor unit 50 and the neodymium magnet 40 are shown in FIG. 8 (a).
2 shows an embodiment for the groove portion 72 when the end surface of the groove is on the same plane. In the case of FIG. 9, the groove portion 72 is formed in a state where the neodymium magnet 40 housed in the rotor unit 50 is chamfered, and conversely, in FIG. 10, the groove portion 72 is formed in a state of being chamfered in the rotor unit 50. Has been formed. However, in either structure, the oncotic oil 71
The effect of the oxidation preventing means 70 for preventing the neodymium magnet 40 from being filled with and being oxidized is the same.

The neodymium magnet 40 has a higher magnetic flux density than the ferrite magnet and has a very large attraction force and repulsion force. Therefore, when the lever 60 is rotated in order to change the polarity of the attraction force, the neodymium magnet 40 is turned on. Since the strong repulsive magnetic force acts and the strong attracting magnetic force acts in the off position direction, the lever 60 suddenly reverses to the off position direction at the on position, which is caused by the locking means 90 described above.
Is prevented by.

Next, FIGS. 11 to 13 show the construction of a rotor unit 50 suitable for constructing a magnetic attraction device in which an object is lifted or moved without the retaining ring 31. Is.

In the configuration shown in FIG. 11, a pair of magnetic members 1
0s are arranged to face each other with a predetermined gap, and a rod-shaped rotor unit 50 is housed in a recessed portion having a semicircular cross section provided on the facing surface of the magnetic member 10 along the length direction and is rotatably arranged. Has been done. As shown in FIG. 12, in the rotor unit 50, a pair of neodymium magnets 40 each having a semicircular cross-section are attached with different magnetic poles facing each other, with a flat non-magnetic member 53 interposed therebetween.

In the magnetic attraction device shown in FIG. 11, the magnetic member 1
0, the rotor unit 50, a spacer 20 arranged between the magnetic member 10 and closing the lower portion of the rotor unit 50, a cap member 21 closing the gap between the magnetic members 10 above the rotor unit 50, and the rotor unit 50. The closed space S formed as a space surrounded by side plates (not shown) arranged on the front and rear end faces of the above is filled with the colloidal oil 71 as the antioxidant 70. In the above configuration, the closed space S includes the gap 74 formed between the rotor unit 50 and the magnetic member 10, and the oxidation preventing means 70 is also included in the gap 74.
It is filled with the colloidal oil 71.

In the above structure, when the rotor unit 50 rotates, the colloidal oil filled in the closed space S makes the rotation of the rotor unit 50 smooth, and the oil film layer is always maintained on the surface of the neodymium magnet 40. By being
Oxidation of the neodymium magnet 40 can be prevented in advance.

An injection hole 22 is formed in the cap member 21, and the injection hole 22 has an inlet at the spring 2.
A check that the colloidal oil or the like can be injected into the closed space S by closing the space from below by the ball 24 urged by 3, and by pouring the colloidal oil or the like into the injection hole 22 with a pressure equal to or greater than the urging force of the spring 23. It has a valve. By doing so, the antioxidant substance 71 such as colloidal oil can be easily injected into the sealed space S around the rotor unit 50 and the neodymium magnet 40, and can be filled at any time.

In each of the above-mentioned embodiments, the closed space S is filled with a colloidal oil such as grease as the antioxidant 71, but the oxidation preventing means 70 of the present invention fills the closed space S. The effect of preventing oxidation of the neodymium magnet 40 can also be obtained by maintaining the vacuum state. In addition, the sealed space S may be filled with a lubricating oil in a liquid or gel state instead of a colloidal oil such as grease as an antioxidant, thereby obtaining the effect of preventing the oxidation of the neodymium magnet 40. You can

In the embodiment shown in FIGS. 1 to 10, this antioxidant substance is further excellent in that it is filled in the groove portion 72 formed along the surface of the neodymium magnet 40 housed in the rotor unit 50. The anti-oxidation effect can be obtained.

[0064]

As described in detail above, the magnetic attraction device of the present invention can prevent the oxidation phenomenon of the neodymium magnet before it occurs, so that its performance and durability can be greatly enhanced.

Further, the magnetic attraction device of the present invention has improved performance by adopting a neodymium magnet, the overall volume and weight of the magnetic attraction device are minimized, and it is easy to handle and operate. It is a very useful invention in that it improves the product quality and the marketability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a first embodiment of a magnetic attraction device of the present invention.

FIG. 2 is a vertical cross-sectional view of the magnetic attraction device shown in FIG.

3 (a) is a cross-sectional view of the magnetic attraction device shown in FIG. 2 seen from the lateral direction, and FIG. 3 (b) is the same as FIG. 3 (a) of the magnetic attraction device of the second embodiment. It is sectional drawing seen from the direction.

FIG. 4 is an exploded perspective view showing an installation structure of a spacer and a rotor unit arranged between adjacent flat plate-shaped members in a third embodiment of the magnetic attraction device of the present invention.

5 is an exploded perspective view showing a modified example of the embodiment of FIG.

6 is a vertical cross-sectional view of an assembled state of the magnetic attraction device shown in FIG.

FIG. 7 is a vertical sectional view showing a fourth embodiment of the magnetic attraction device of the present invention.

FIG. 8 is a perspective view showing an embodiment in which a coating unit is formed along the surface of a neodymium magnet housed in a rotor unit.

FIG. 9 is an enlarged cross-sectional view of essential parts showing an embodiment in which a coating means is formed on a portion of the neodymium magnet housed in the rotor unit, which is chamfered along the surface thereof.

FIG. 10 is an enlarged cross-sectional view of an essential part showing an embodiment in which a rotor unit accommodating a neodymium magnet is chamfered along the surface of the neodymium magnet, and coating means is formed on the chamfered portion.

FIG. 11 is a sectional view showing a fifth embodiment of the magnetic attraction device of the present invention.

12 is a perspective view of the rotor unit shown in FIG.

FIG. 13 is an enlarged cross-sectional view of part A in FIG.

[Explanation of symbols]

10 ... Magnetic member (pole member), 11 ... Non-magnetic member, 20
... Spacer, 21 ... Cap member, 30 ... Lid plate, 40 ...
Neodymium magnet, 50 ... Rotor unit, 60 ... Lever,
70 ... Antioxidant means, 71 ... Colloidal oil, 80 ... Side plate, 90
… Locking means.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B66C 1/04

Claims (12)

(57) [Claims] 1. A pair of flat plate-like members, which are made up of a non-magnetic member arranged in the center and magnetic members arranged on both sides of the non-magnetic member and are arranged to face each other, and are rotated between the flat plate-like members. A cylindrical rotor unit rotatably supported, at least one pair of neodymium magnets attached so that different magnetic poles face the rotor unit and face both plate members, and the rotor unit. A magnetic attraction device that switches the direction of magnetic force lines of a neodymium magnet with respect to a magnetic member by rotating, and a sealed space portion that is provided around the neodymium magnet and prevents contact between the neodymium magnet and oxygen in the atmosphere, A magnetic attraction device using a neodymium magnet, characterized in that it is provided with an oxidation preventing means for keeping a closed space part in a vacuum state to be in an oxidation preventing state. 2. A non-magnetic member arranged in the center and both sides of it
It is made up of magnetic members and is placed facing each other.
A pair of flat plate-shaped members, Cylindrical rotation rotatably supported between both plate members
Child unit, Different magnetic poles face the rotor unit and
At least one pair of neos mounted facing the plate member
Jim magnet, By rotating the rotor unit, it becomes a magnetic member.
The magnetic absorption that switches the direction of the magnetic field lines of the neodymium magnet to
A kimono, The neodymium magnet and the atmosphere are provided around the neodymium magnet.
A closed space part that prevents contact with oxygen in the inside, and the closed space part
Due to the oily antioxidant substance filled in the
Is provided with an anti-oxidation means for making the anti-oxidation state
Magnetic attractor using a neodymium magnet. 3. The spacer, which is disposed between both flat plate-shaped members, surrounds the lower and lateral sides of the rotor unit and has an opening at the upper side, and a cap member for closing the opening of the spacer. Claims characterized by consisting of
A magnetic attraction device using the neodymium magnet according to claim 1 or 2 . Wherein said cap member comprises an injection hole for injecting the antioxidant substances of oil to the sealed space portion, injection hole includes a check valve that freely inject oxidation prevention material in the enclosed space A magnetic attraction device using the neodymium magnet according to claim 3 . And wherein said plate-like hole formed in a position opposed to the neodymium magnet member composed of a antioxidant oily substance filled in the hole portion, when the rotor unit is rotated, 2 through claim, characterized in that it comprises a first coating means for applying the oxidation prevention material on a surface facing the flat plate-like member attached to the neodymium magnets to the rotor unit
A magnetic attraction device using the neodymium magnet according to claim 4 . 6. A groove portion formed along the surface of the neodymium magnets housed in the rotor unit consists of a antioxidant oily substance filled in the groove portion, when the rotor unit rotates A second coating means for causing the antioxidant substance to flow out from the groove portion as the rotor rotates, and applying the antioxidant substance to a surface of the neodymium magnet attached to the rotor unit, the surface facing the flat plate member. A magnetic attraction device using the neodymium magnet according to any one of claims 2 to 5 , which is provided. 7. The antioxidant substances of the oily, claim 2, characterized in that it comprises any one of a lubricating oil or colloidal oil
A magnetic attraction device using the neodymium magnet according to claim 6 . 8. A pair of magnetic members arranged to face each other at a predetermined interval, a semicircular recess in cross section provided on the facing surfaces of the magnetic members along the length direction, and a flat plate-shaped non-shaped member. The magnetic member and a pair of neodymium magnets having semicircular cross-sections attached with the different magnetic poles facing each other with the flat plate-like non-magnetic member sandwiched therebetween are housed in the recess and freely rotatable between the magnetic members. A cylindrical rotor unit disposed in the, and a magnetic attraction device that switches the direction of magnetic lines of force of a neodymium magnet with respect to a magnetic member by rotating the rotor unit, and a hermetic seal formed around the neodymium magnet. A magnetic attraction device using a neodymium magnet, comprising: a space part; and an antioxidation means for maintaining the closed space part in a vacuum state to provide an antioxidation state. 9. A pair of pairs facing each other at a predetermined interval
A magnetic member, A cross section provided along the length direction on the opposing surfaces of both magnetic members
A semicircular concave section, Different between the flat non-magnetic member and the flat non-magnetic member
A pair of neo-circular cross-sections attached with their magnetic poles facing each other
A gym magnet and is housed in the recess between the magnetic members.
With a cylindrical rotor unit that is rotatably arranged with By rotating the rotor unit, it becomes a magnetic member.
The magnetic absorption that switches the direction of the magnetic field lines of the neodymium magnet to
A kimono, The sealed space formed around the neodymium magnet and the closed space
Due to the oily antioxidant substance filled in the closed space,
Provide an anti-oxidation means to put the closed space in an anti-oxidation state.
And a magnetic attraction device using a neodymium magnet. Wherein said enclosed space portion, and the magnetic member of the pair, a spacer is arranged to close the lower portion of the rotor unit between the two magnetic members, the upper of the two magnetic members of said rotor unit A magnetic attraction device using the neodymium magnet according to claim 8 or 9, further comprising a cap member for closing the gap. 11. The cap member has an injection hole for injecting an oily antioxidant into the closed space, and the injection hole has a check valve for allowing the injection of the antioxidant into the closed space. A magnetic attraction device using the neodymium magnet according to claim 10 . 12. antioxidant substances of the oily, claims, characterized in that it comprises any one of a lubricating oil or colloidal oil
A magnetic attraction device using the neodymium magnet according to any one of claims 9 to 11 .