TWI890853B - Magnet holder - Google Patents

Abstract

The present invention provides a magnet holder that can reliably switch the adsorptive surface even in a narrow working space; it is provided with magnets 10, arranged at required intervals in the outer circumferential direction to form a holder 20 so as to be able to rotate in a horizontal plane The upper magnetic plate 30, the lower magnetic plate 40 of the holding member 20 are clamped in the state of the holder 20, and the separator 44 formed on the lower side of the holder 20 of the lower magnetic plate 40 and extending radially from the center of the lower side toward the outer periphery; when facing the lower side, the magnet 10 is provided in the outer periphery of the lower side and the area divided by the separator 44, and the magnetic poles of the magnets 10 adjacent to each other in the outer circumferential direction of the flat plate portion 22A are different from each other; the holder 20 of the magnet holder 100 is characterized in that the plane area of the magnet 10 is formed between the position where the separating body 44 is in a separated state in the rotation direction of the holder 20 and the separating body 44, and is rotatable.

Description

Magnetic storage container

The present invention relates to a magnetic storage container.

On a metalworking table or machine table, a magnetic container is suitable for use as a temporary support for fixing fixtures or measuring devices. For example, the structures of magnetic containers disclosed in non-patent documents 1 and 2 are well known.

【Prior Technical Literature】

Non-patent literature

[Non-patent document 1]: "Magnetic Application Equipment General Manufacturer, Kanetech Thin Permanent Magnet Mount [MB-L]" [online], Kanetech Corporation, [retrieved September 18, 2020], Internet [URL: http://www.kanetec.co.jp/products/mb-l.html]

[Non-patent document 2]: "Magnetic Application Equipment General Manufacturer, Kanetech Thin Permanent Magnet Stand [MB-L-C]" [online], Kanetech Corporation, [retrieved September 18, 2020], Internet [URL: http://www.kanetec.co.jp/products/mb-l-C.html]

The magnetic containers disclosed in Non-Patent Documents 1 and 2 utilize multiple permanent magnets housed within a main body that rotate horizontally. The suction surface at the bottom of the main body is turned on and off by changing the arrangement of a separator located at the bottom of the main body. However, since the magnetic containers in Non-Patent Documents 1 and 2 only have a single separator located at the bottom of the main body, switching the suction surface on and off requires rotating the operating lever 90 degrees, making it difficult to operate in a cramped working area.

Therefore, the present invention aims to solve the above-mentioned problem. Its purpose is to provide the following means: by reducing the rotation angle of the container provided with the magnet when opening and closing the suction surface, the magnetic container with the suction surface can be opened and closed reliably even in a narrow working position.

The inventors have conducted in-depth research to solve the above problems and have obtained the following structure. That is, the present invention includes: a magnetic body, which is composed of a non-magnetic body and arranged in a circumferential shape, and a retaining member formed by configuring the magnetic body as a required interval, a first magnetic plate and a second magnetic plate that clamp the retaining member in the thickness direction in a state that can rotate in a horizontal plane, a surface formed on the second magnetic plate on the opposite side of the clamping surface of the retaining member, and an even number of separators of more than 4 extending from the center position of the opposite surface toward the outer periphery of the opposite surface; When facing the opposite surface, the magnetic body is arranged such that its magnetic poles are aligned with the outer periphery of the opposite surface within the region defined by the separator. Furthermore, in the rotational direction of the holder, the magnetic poles of adjacent magnetic bodies are arranged differently from each other. The holder is a magnetic receiving body, and the magnets are fixed in a planar region of the magnetic receiving body by separators at positions between the separators, with the positions being divided in the rotational direction of the holder.

Therefore, by increasing the number of magnetic poles on the magnetic holder's attraction surface (the side opposite the second magnetic plate's retainer clamping surface), the rotation angle when opening and closing the attraction surface can be significantly reduced, allowing for reliable switching between opening and closing of the attraction surface even in confined working positions.

In addition, the plane shape of the magnet is preferably a sector shape.

Therefore, since the magnets that can be accommodated by the holder can be increased as much as possible, the adsorption force of the adsorption surface can be increased.

Furthermore, it is preferred that the retaining member, the first magnetic plate, and the second magnetic plate are all circular. Furthermore, it is preferred that the retaining member, the first magnetic plate, and the second magnetic plate are all in the shape of a regular N-gon (N is an even number greater than 4), with the separator extending toward each vertex of the regular N-gon.

In this way, the aforementioned circular magnetic container and the regular N-shaped (N is 4 or an even number) magnetic container can be easily multipolarized.

Furthermore, the second magnetic plate is preferably configured as a protruding magnetic pole protruding from the opposite side.

This concentrates the magnet's magnetic properties on the suction section, further enhancing the suction force. Furthermore, when the suction section's suction force is turned off, the suction section and the object being suctioned can be easily separated.

Furthermore, the protruding magnetic poles are preferably located at the outer periphery of the area separated by the separator. Furthermore, the protruding magnetic poles are preferably located within a desired radial range from the center of the opposing surface to the outer periphery at each spacing position of the separator. Furthermore, the protruding magnetic poles preferably have two straight line portions arranged parallel to the separator in the area separated by the separator and the outer periphery, and a connecting portion connecting the inner ends of the straight line portions at the center end of the opposing surface.

In this way, the shape of the object being attracted can be matched to the shape of the magnetic pole. Furthermore, by arranging the protruding magnetic pole and the magnet close together, magnetic flux leakage can be reduced, further enhancing the attraction of the protruding magnetic pole.

By adopting the magnetic receiver structure disclosed in this invention, the number of magnetic poles on the second magnetic plate's retaining element's clamping surface and the opposing surface increases. This reduces the rotation angle of the retaining element, where the magnets are located, when the attraction surface's attraction force is turned on and off. As a result, the attraction surface can be reliably switched on and off, even in confined working spaces.

10: Magnet

20: Retaining element

22: Inner retainer

22A: Flat Plate

22B: Protrusion

22C: Containment Department

22D: Screw hole

24: External retainer

24A: Containment Department

24B: Positioning protrusion

24C: Open

30: Upper magnetic plate (first magnetic plate)

32: Assembly screw hole

34: Fixing screw hole

40: Bottom magnetic plate (second magnetic plate)

42: Assembly screw hole

44: Separator

44A: 1st tank

44B: Second tank

46: Protruding magnetic pole

46A: Straight line

46B: Connection section

50: Rotating rod

100: Magnetic Storage Container

Figures 1A to 1C are perspective views of the lower side, upper side, and bottom view of the magnetic container in the first embodiment.

Figure 2 is a partial plan view of the magnetic container in the first embodiment.

Figure 3 is a partial perspective plan view showing the protruding portion of the magnetic receiver shown in Figure 2 being switched in the closing direction.

Figures 4A and 4B are schematic illustrations of the arrangement of the magnets in the magnetic container of the first embodiment when the attraction force caused by the magnetic force of the protruding magnetic pole is on, and when the attraction force caused by the magnetic force of the protruding magnetic pole is off.

Figure 5 is a partial perspective view of the bottom surface of the magnetic container in the second embodiment.

Figure 6 is a partial perspective view of the bottom surface of the magnetic container in the third embodiment.

Figure 7 is a partial perspective view of the bottom surface of the magnetic container in the fourth embodiment.

Figures 8A and 8B are partial perspective bottom views of a variation of the magnetic container in the first embodiment and a partial perspective bottom view of a variation of the magnetic container in the second embodiment.

Figures 9A and 9B are partial perspective bottom views of a variation of the magnetic container in the third embodiment, and partial perspective bottom views of a variation of the magnetic container in the fourth embodiment.

Figures 10A and 10B are partial perspective plan and three-dimensional views of a magnetic container in another embodiment.

The following describes the implementation of the magnetic container of the present invention with reference to the accompanying drawings.

[First Implementation Form]

As shown in Figures 1A to 1C, 2, and 3, the magnetic container 100 of the first embodiment includes a magnet 10, a holder 20 for holding the magnet 10, an upper magnetic plate 30 serving as a first magnetic plate that rotatably holds the holder 20 holding the magnet 10 in the thickness direction within a horizontal plane, and a lower magnetic plate 40 serving as a second magnetic plate.

As shown in Figures 2 and 3, magnets 10 are fan-shaped in plan view and are positioned at four locations at desired intervals along the circumference of flat plate portion 22A within retainer 22, which forms part of retainer 20. In this embodiment, magnets 10 are fan-shaped in plan view, with magnetic poles formed on the top and bottom surfaces of flat plate portion 22A. The type of magnet 10 is not particularly limited. Adjacent magnets 10 are arranged at desired intervals along the circumference of flat plate portion 22A (the direction of rotation of retainer 20), with the magnetic poles displayed on the top surface of flat plate portion 22A facing in different directions.

The holder 20, which houses the magnet 10, includes an inner holder 22 and an outer holder 24, both made of non-magnetic material. In this embodiment, the holder 20 is made of SUS (stainless steel) 304, but any non-magnetic material is acceptable. The inner holder 22 includes a flat plate portion 22A, which is circular in plan view, and a protrusion 22B extending radially outward from the outer periphery of the flat plate portion 22A. The flat plate portion 22A includes a plurality of receiving portions 22C, which are arranged along the circumference of the flat plate portion 22A, for housing the magnet 10. In this embodiment, the planar shape of each receiving portion 22C is formed to be the same as the planar shape of the magnet 10. However, the magnet 10 is accommodated by being embedded in the receiving portion 22C. This is not limited to this embodiment; as long as the magnet 10 can be retained without falling, the specific shape is not limited.

The outer retainer 24, which houses the inner retainer 22, is shaped like a tray, with a receiving portion 24A formed to accommodate the flat plate portion 22A of the inner bracket 22. The inner circumference of the flat plate portion receiving portion 24A is provided with a plurality of positioning protrusions 24B that contact the outer periphery of the flat plate portion 22A. An opening 24C is formed on one side surface of the outer bracket 24 to allow the protrusion 22B of the inner bracket 22 to rotate within a horizontal plane. With the inner bracket 22 accommodated in the outer bracket 24, the protrusion 22B protrudes outward from the opening 24C toward the outside of the outer bracket 24, from the position shown in Figure 2 to that shown in Figure 3. The positioning protrusions 24B allow the outer periphery of the flat plate portion 22A to rotate while remaining positioned.

The holder 20, which accommodates the magnet 10 in a horizontally rotatable state, is held in the holder 20's thickness direction (upper and lower surfaces) by an upper magnetic plate 30 and a lower magnetic plate 40. In this embodiment, magnets are used as the upper and lower magnetic plates 30 and 40, but any material other than magnets is suitable.

The upper magnetic plate 30 and the lower magnetic plate 40 are formed into a planar shape slightly larger than the planar shape of the retaining member 20. A portion of the protrusion 22B of the retaining member 20 protrudes from the sides of the upper and lower magnetic plates 30 and 40. The upper side of the upper magnetic plate 30 has assembly screw holes 32 formed along the outer periphery and a fixing screw hole 34 formed in the center of the upper side. The assembly screw holes 32 are used to integrally assemble the upper magnetic plate 30, the retaining member 20, and the lower magnetic plate 40. The fixing screw holes 34 are used to screw items placed on the upper magnetic plate 30. In this embodiment, the fixing screw hole 34 is provided at only one location, but multiple fixing screw holes 34 may also be provided on the upper magnetic plate 30.

The bottom surface of the lower magnetic plate 40, which is the other side of the clamping surface of the retaining member 20, is provided with a screw hole 42 for assembling the lower magnetic plate 40 with the retaining member 20 and the upper magnetic plate 30 as a whole. In addition, on the bottom surface of the lower magnetic plate 40, four separators 44 are formed that extend radially to the outer periphery with the center position as the base point. The four separators 44 are formed in a cross shape, and each origin is the same. The separator 44 in this embodiment is formed by a groove having a two-stage bottom formed on the lower magnetic plate 40. More specifically, the separator 44 is formed by a second groove 44B, which is narrower and deeper than the center part of the width direction of the first groove 44A, and the bottom of the first groove 44A is shallower and wider. Since the separator 44 is a trough with a two-level bottom structure, it is easy to process during manufacturing.

Furthermore, in this embodiment, the outer periphery of the lower magnetic plate 40 forms protruding magnetic poles 46 protruding from the bottom surface of the lower magnetic plate 40, as shown by the shaded portion in the bottom view of Figure 1C. In this embodiment, since the outer periphery is divided by a separator 44 at the center of the longitudinal direction, the protruding magnetic poles 46 form an isopause L-shape at each corner of the bottom of the lower magnetic plate 40. The protruding magnetic poles 46 act as magnetic attraction elements, and the attraction can be switched on and off by rotating the operating lever of the protruding portion 22B.

Figure 4A is an explanatory diagram showing the arrangement of magnets 10 when the magnetic attraction of protruding magnetic pole 46 is on. Figure 4B is also an explanatory diagram showing the arrangement of magnets 10 when the magnetic attraction of protruding magnetic pole 46 is off. When the attraction of protruding magnetic pole 46 is on, as shown in Figures 2 and 4A, magnets 10 are retracted into the flat area on the bottom surface of lower magnetic plate 40, separated by separator 44. At this point, the magnetic lines of force are released in the direction of protrusion of protruding magnetic pole 46, as indicated by the arrows in the double-point chain. In other words, when a magnetic object approaches protruding magnetic pole 46, sufficient magnetic lines of force flow through the magnet to attract the magnetic object to protruding magnetic pole 46.

In contrast, when the attraction of the protruding magnetic pole 46 is off, as shown in Figures 3 and 4B, the planar position of the magnets 10 straddles the planar position of the separator 44 (the planar region of the magnets 10 is divided by the separator 44 in the direction of rotation of the inner retainer 22 (retainer 20)). At this point, as shown by a double-point chain, the magnetic forces of consecutive magnets 10 within the planar region of the bottom surface of the magnetic plate 40 are separated by the separator 44, resulting in a magnetic short-circuit. The magnetic lines of force are not released in the direction of the protruding magnetic pole 46. In other words, the magnetic lines of force barely pass through the magnetic material, and even if the magnetic material is brought close to the protruding magnetic pole 46, it remains unattracted.

Therefore, compared to conventional magnetic containers, the magnetic container 100 of this embodiment achieves on/off switching of the suction portion by utilizing a protrusion 22B having a rotation angle half that of the operating lever. This allows the suction portion to be opened and closed reliably, even in narrow spaces where switching the suction portion on/off is difficult with conventional magnetic containers.

[Second Implementation Form]

Figure 5 is a partial perspective bottom view of a magnetic container 100 according to the second embodiment. In this embodiment, reference numerals and symbols used in the first embodiment are used, omitting detailed descriptions of common parts with the first embodiment. Furthermore, unless otherwise noted, the magnetic container 100 according to this embodiment has the same structure as the magnetic container 100 according to the first embodiment.

The magnetic container 100 of this embodiment differs from the magnetic container 100 of the first embodiment in that its planar shape forms a regular hexagon. The lower magnetic plate 40 of this embodiment has six separators 44 extending radially from the center toward each vertex of the regular hexagon. The protruding magnetic poles 46 of this embodiment are formed by pre-protruding the outer periphery of the bottom surface of the lower magnetic plate 40. When the separators 44 are formed, the protruding outer periphery at each vertex is divided into linear shapes. Thus, the separators 44 and protruding magnetic poles 46 form six triangular planar regions. These, in conjunction with the receptacle 22C provided on the flat plate portion 22A of the inner retainer 22, can accommodate the magnets 10 formed in a sectoral planar region.

Figure 5 shows the state in which the attraction of the protruding magnetic pole 46 is turned on. When the protrusion 22B is rotated to the OFF position (dashed line) in Figure 5, the flat plate portion 22A rotates around the center portion of the bottom surface of the underlying magnetic plate 40, and the planar position of the magnet 10 is aligned so as to straddle the planar position of the separator 44, allowing the attraction of the protruding magnetic pole 46 to be switched on and off. Because the number of magnetic poles in the magnetic container 100 of this embodiment is greater than that of the first embodiment, the on/off switching operating angle of the protruding magnetic pole 46 in the first embodiment is smaller than the operating angle, which is advantageous.

[Third Implementation Form]

Figure 6 is a partial perspective bottom view of a magnetic container 100 according to the third embodiment. This embodiment shares the same configuration as the first and second embodiments, using the same reference numerals and symbols as in each embodiment, omitting detailed descriptions of common features. Furthermore, unless specifically mentioned regarding components not shown in the bottom view, the magnetic container 100 according to this embodiment shares the same configuration as the magnetic containers 100 according to the first and second embodiments.

The magnetic container 100 of this embodiment differs from the configuration of the magnetic containers 100 of the first and second embodiments in that its planar shape forms a regular octagon. The bottom of the lower magnetic plate 40 of this embodiment has eight separators 44 extending radially from the center toward each vertex of the regular octagon. Protruding magnetic poles 46 of this embodiment are positioned at each interval between the separators 44, separated in plan view by the separators 44 and the outer periphery of the bottom surface of the lower magnetic plate 40. The protruding magnetic poles 46 of this embodiment are arranged radially within a desired radial range, starting from a predetermined radially outward position from the center of the bottom of the lower magnetic plate 40 to the outer periphery.

Figure 6 shows the state in which the attraction of the protruding magnetic pole 46 is turned on. When the protrusion 22B is rotated to the OFF position (dashed line) in Figure 6, the flat plate 22A rotates around the center portion of the bottom surface of the underlying magnetic plate 40, and the planar position of the magnet 10 is aligned across the planar position of the separator 44, thereby switching the attraction of the protruding magnetic pole 46 off. Since the number of magnetic poles in the magnetic container 100 of this embodiment is even greater than that of the magnetic container 100 of the second embodiment, the on/off switching operating angle of the protruding magnetic pole 46 is smaller than the operating angle in the second embodiment, which is more advantageous.

[Fourth Implementation Form]

Figure 7 is a partial perspective bottom view of a magnetic container 100 according to the fourth embodiment. In this embodiment, for configurations common to the first through third embodiments, reference numerals and symbols used in each embodiment are used, and detailed descriptions of the common portions are omitted. Furthermore, unless specifically mentioned regarding components not shown in the bottom view, the magnetic container 100 according to this embodiment has the same configuration as the magnetic containers 100 according to the first through third embodiments.

The magnetic container 100 in this embodiment is similar to the third embodiment in that the planar shape forms a regular octagon. Similarly, the bottom surface of the lower magnetic plate 40 of the magnetic container 100 in this embodiment is composed of eight separators 44 extending radially toward each vertex of the regular octagon with the center portion as the base point. The protruding magnetic pole 46 in this embodiment is characterized by forming a V-shape in the planar area and being separated by the separator 44 and the outer periphery of the bottom surface of the lower magnetic plate 40. Specifically, two straight line portions 46A are radially arranged to the outer periphery parallel to the separator 44. At a position adjacent to the separator 44, the protruding magnetic pole 46 is formed by a connecting portion 46B that connects the inner ends of the two straight line portions 46A and the central side ends of the two straight line portions 46A. Thus, forming a wider protruding magnetic pole 46 is advantageous in terms of expanding the adsorption range.

Figure 7 shows the state in which the attraction of the protruding magnetic pole 46 is turned on. When the protrusion 22B is rotated to the OFF position (dashed line) in Figure 7, the flat plate 22A rotates about the center of the bottom surface of the magnetic plate 40, and the planar position of the magnet 10 is arranged to straddle the planar position of the separator 44, switching the attraction of the protruding magnetic pole 46 off. Since the magnetic container 100 of this embodiment has eight magnetic poles, the same as the third embodiment, it can operate at the same angle as the third embodiment.

While the above descriptions of various embodiments of the magnetic container 100 of the present invention have been provided, the magnetic container 100 is not limited to these embodiments. For example, in the above embodiments, the planar shape of the magnetic container 100 is an equilateral rectangle or a regular hexagon, while an equilateral octagon is also described, but is not limited to these. The planar shape of the magnetic container 100 can also be a regular N-gon (N is an even number of 4 or more), such as a regular decagon or a regular dodecagon. In the magnetic container 100 of the present invention, when the planar shape is a regular N-gon, N separators 44 (an even number of 4 or more) extend from the center of the plane toward each vertex. The magnetic container 100 is centered at the center of the plane, and the N magnets 10 are arranged at equal intervals along the circumference of the holder 20.

Furthermore, as shown in Figures 8A, 8B, 9A, and 9B, the planar shape of the magnetic container 100 may be circular. Furthermore, Figure 8A is a variation of the first embodiment, Figure 8B is a variation of the second embodiment, Figure 9A is a variation of the third embodiment, and Figure 9B is a variation of the fourth embodiment. As shown in Figures 8A, 8B, 9A, and 9B, when the planar shape of the magnetic container 100 is circular, the receiving portion 22C may be arranged in N equal sections (N being an even number of 4 or greater) along the circumference of the flat plate portion 22A. When the number of protruding magnetic poles 46 (the number of receiving portions 22C) increases, the magnetic container 100 can reduce the required rotation angle of the protruding portion 22B when switching the attraction force on and off using the magnetic force of the protruding magnetic poles 46. However, the attraction force of the protruding magnetic poles 46 decreases. Therefore, the angle can be appropriately set according to the required attraction force.

Furthermore, while the above embodiment utilizes magnet 10 having a fan-shaped top view, the top view shape of magnet 10 is not limited to this fan-shaped top view. Magnet 10 can be housed primarily within the area defined by separator 44 formed on the bottom surface of lower magnetic plate 40, opposite to the clamping surface of retainer 20, and the outer periphery of lower magnetic plate 40. There are no particular limitations on the top view shape.

Furthermore, while positioning protrusions 24B are formed on the outer retainer 24 in the above-described embodiment, positioning protrusions 24B may be omitted. In this case, the planar shape of the flat plate portion receiving portion 24A can be equal to, or slightly larger than, the planar shape of the flat plate portion 22A. In short, it is preferable to maintain the position of the outer periphery of the flat plate portion 22A while allowing for horizontal rotation.

Furthermore, in the above-described embodiment, the retainer 20 of the magnet 10 rotatably retains the center of the plane of the magnetic container 100 as its rotation axis, and is described as having an inner retainer 22 and an outer retainer 24, but the present invention is not limited to this embodiment. A recess (not shown) corresponding to the flat plate portion receiving portion 24A is formed on at least one of the surfaces of the upper magnetic plate 30 or the lower magnetic plate 40 that faces the inner retainer 22, accommodating the inner retainer 22 in a rotatable manner. This recess may also be configured to accommodate the inner retainer 22. Furthermore, this recess is partially rotatable with the protrusion 22B of the inner retainer 22, corresponding to the positioning protrusion 24B. The protrusion 22B protruding from the side also forms a portion corresponding to the opening 24C on the outer periphery of the flat plate portion 22A of the inner retainer 22, thereby positioning the inner retainer 22 for rotation in a horizontal plane.

In the above-described embodiment, the retainer 20 includes a protrusion 22B that projects radially outward from the flat plate 22A. The attraction of the protruding magnetic pole 46 is switched between open and closed by rotation in a predetermined direction within the opening 24C. However, this is not limited to this embodiment. For example, as shown in Figures 10A and 10B , a screw hole 22D having the same diameter as the fixing screw hole 34 is formed on the axis of the inner retainer 22, and a screw rod 50 is formed at its insertion-side tip end. Alternatively, the rod 50 can be screwed into both the fixing screw hole 34 and the screw hole 22D. The magnetic container 100 of this embodiment is screwed together by rotating the rod 50 using a drive source such as a motor or manual rotation. The inner retainer 22 can also be appropriately rotated within the outer retainer 24 in the same manner as in other embodiments.

Furthermore, when the magnetic container 100 shown in Figures 10A and 10B is employed, the protrusion 22B of the inner retainer 22 and the opening 24C of the outer retainer 24 can be omitted. Consequently, this configuration of the magnetic container 100 further reduces the space required for the magnetic container 100 compared to other embodiments. In other words, in the other embodiment described above, the protruding magnetic pole 46 can be switched on and off even in difficult-to-access locations, which is a significant advantage.

Furthermore, in the above embodiment, the separator 44 is described as being formed by a groove having a two-stage bottom. However, the shape of the separator 44 is not limited to this. The separator 44 may be formed as a simple groove, or may be formed by embedding a non-magnetic material in the bottom of the underlying magnetic plate 40.

Furthermore, in addition to the above-mentioned variations, appropriate combinations of the variations described in the embodiments may be employed.

100: Magnetic Storage Container

10: Magnet

20: Retaining element

22: Inner retainer

22A: Flat Plate

22B: Protrusion

22C: Containment Department

24: External retainer

24A: Containment Department

24B: Positioning protrusion

24C: Open

30: Upper magnetic plate (first magnetic plate)

32: Assembly screw hole

34: Fixing screw hole

42: Assembly screw hole

44: Separator

44A: First tank

44B: Second tank

Claims (5)

A magnetic container comprises: a magnet, a holder made of a non-magnetic material and formed so that the magnets can be arranged circumferentially at desired intervals, a first magnetic plate and a second magnetic plate, wherein the holder can rotate in a horizontal plane and clamps the holder in the thickness direction; an even number of separators, four or more, are formed on the side of the second magnetic plate opposite to the clamping surface of the holder and extend from the center of the opposite side to the outer periphery of the opposite side; and the characteristic is that when facing the opposite side, the magnet is such that the space between the separator and the opposite side surface is The magnetic poles of the magnets contained in the areas separated by the outer periphery are identical, and magnets of different poles are arranged adjacent to each other in the rotational direction. The retaining member is divided by the separators in the rotational direction of the retaining member, and rotates between positions between the separators where the magnets are contained. The second magnetic plate has protruding magnetic poles protruding from the opposing side surfaces. The protruding magnetic poles are provided at each arrangement interval of the separator within a desired radial range from the center of the opposing side surface to the outer periphery. A magnetic container comprises: a magnet, a holder made of a non-magnetic material and formed so that the magnets can be arranged in a circumferential arrangement at a desired interval, a first magnetic plate and a second magnetic plate, wherein the holder can rotate in a horizontal plane and clamps the holder in the thickness direction; an even number of separators, four or more, are formed on the side of the second magnetic plate opposite to the clamping surface of the holder and extend from the center of the opposite side to the outer periphery of the opposite side; the characteristic of the container is that when facing the opposite side, the magnet is so that in the area separated from the outer periphery of the opposite side surface by the separator, the magnet is in contact with the magnet contained therein. The magnetic poles are identical, and magnets of different poles are arranged adjacent to each other in the rotational direction. The retaining member is divided by the separator in the rotational direction of the retaining member, and the retaining member rotates between positions between the separators, where the magnets are housed. The second magnetic plate has protruding magnetic poles protruding from opposing side surfaces. The protruding magnetic poles include, in the region separated by the separator and the outer periphery, two straight line portions extending parallel to the separator, and a connecting portion connecting the opposing central ends to the inner ends of the straight line portions. The magnetic container as described in claim 1 or 2, wherein the protruding magnetic pole is provided at a position on the outer periphery separated by the separator. A magnetic container comprises: a magnet, a holder made of a non-magnetic material and formed so that the magnets can be arranged circumferentially at a desired interval, a first magnetic plate and a second magnetic plate, wherein the holder can rotate in a horizontal plane and clamps the holder in the thickness direction; an even number of separators, four or more, formed on the side of the second magnetic plate opposite to the clamping surface of the holder and extending from the center of the opposite side to the outer periphery of the opposite side. The retaining member, the first magnetic plate, and the second magnetic plate are all regular N-sided polygons (N is an even number greater than 4), the separator extends toward each vertex of the regular N-sided polygon, and when facing the opposite side, the magnets are arranged so that the magnetic poles of the magnets contained therein are aligned in the region separated from the outer periphery of the separator and the opposite side surface, and magnets with different magnetic poles are arranged adjacent to each other in the direction of rotation of the retaining member. The magnetic container as described in claim 4, wherein the magnet forms a sector shape in a plan view.