WO2022080009A1

WO2022080009A1 - Magnet holder

Info

Publication number: WO2022080009A1
Application number: PCT/JP2021/030775
Authority: WO
Inventors: 泰正山本; 勝山木
Original assignee: カネテック株式会社
Priority date: 2020-10-14
Filing date: 2021-08-23
Publication date: 2022-04-21
Also published as: JP7420381B2; TW202228899A; JP2022064674A; CN116114037A; KR20230085112A

Abstract

The present invention addresses the problem of providing a magnet holder that enables reliable turning on and off of an attracting surface even in a narrow work location.　The solution consists in a magnet holder (100) comprising: magnets (10); a holder (20) allowing the magnets (10) to be disposed at a required interval in a circumferential direction; an upper surface side magnetic material plate (30) and a lower surface side magnetic material plate (40) rotatably sandwiching the holder (20); and separators (44) formed in the lower surface side magnetic material plate (40) on a lower surface of the holder (20), and extending from the central position to the periphery of the lower surface. When facing the lower surface, the magnets (10) are accommodated in regions divided by the periphery of the lower surface and the separators (44). The magnetic poles of the magnets (10) adjacent to each other in the circumferential direction of a planar portion (22A) are varied. The holder (20) pivots between a position at which the planar regions of the magnets (10) are divided by the separators (44) in a pivoting direction and positions in which the magnets (10) are located in a position between the separators (44).

Description

Magnet holder

The present invention relates to a magnet holder.

A magnet holder is preferably used as a temporary mounting base for fixing a jig or a measuring device on an iron surface plate or a machine table. As such a magnet holder, for example, a magnet holder having a configuration as disclosed in Non-Patent Documents 1 and 2 is known.

The magnet holder disclosed in Non-Patent Documents 1 and 2 changes the arrangement with respect to the separator arranged on the bottom surface of the main body by rotating a plurality of permanent magnets housed inside the main body in a horizontal plane. The suction surface on the bottom of the main body is switched on and off. In the magnet holders of Non-Patent Documents 1 and 2, since only one separator is arranged on the bottom surface of the main body, the operation lever must be rotated 90 degrees to switch the suction surface on and off, which is a narrow work area. In, it is difficult to switch the suction surface on and off.

Therefore, the present invention has been made to solve the above problems, and the object thereof is as follows. That is, by reducing the rotation angle of the holder on which the magnet is arranged when switching the suction surface on and off, a magnet holder that can reliably switch the suction surface on and off even in a narrow work place is provided. To do.

As a result of diligent research by the inventor to solve the above problems, the following configuration was reached. That is, the present invention comprises a holder composed of a magnet and a non-magnetic material so that the magnets can be arranged at required intervals in a circumferential arrangement, and the holder can be rotated in a horizontal plane. The first magnetic material plate and the second magnetic material plate that sandwich the holder in the thickness direction are formed on the side surface opposite to the holding surface of the holder of the second magnetic material plate, and the opposite side surface is formed from the center position of the opposite side surface. It comprises four or more even separators extending toward the outer peripheral edge of the side surface, and the magnet is separated from the outer peripheral edge of the opposite side surface by the separator when facing the opposite side surface. The magnetic poles are housed so as to be the same in the region, and the magnetic poles of the magnets adjacent to each other in the rotation direction of the holder are arranged differently from each other. The magnet holder is characterized in that the region rotates between a position in which the region is divided in the rotation direction of the holder and a position where the magnet is housed in a position between the separators.

As a result, the number of magnetic poles on the suction surface of the magnet holder (the side surface opposite to the holder holding surface of the second magnetic plate) increases, so the rotation angle when switching the suction surface on and off is significantly reduced. This makes it possible to reliably switch the suction surface on and off even in a narrow work area.

Further, it is preferable that the plan view shape of the magnet is formed into a fan shape.

As a result, the magnet housed in the holder can be made as large as possible, so that the suction force of the suction surface can be improved.

Further, it is preferable that the holder, the first magnetic material plate, and the second magnetic material plate are all formed in a circular shape. Further, the holder, the first magnetic plate, and the second magnetic plate are all regular N-sided polygons (N is an even number of 4 or more), and the separator extends toward the vertices of the regular N-sided polygon. It is also preferable that it is provided.

With these, it is possible to make a circular magnet holder or a regular N-sided magnet holder (N is an even number of 4 or more), and multipolarization can be easily performed.

Further, it is preferable that the second magnetic plate is provided with a protruding magnetic pole protruding from the opposite side surface.

As a result, the magnetism of the magnet can be concentrated in the suction part, and the suction force can be further improved. Further, when the adsorption force of the adsorption portion is turned off, the adsorption portion and the object to be adsorbed can be easily separated.

Further, it is preferable that the protruding magnetic poles are arranged at the outer peripheral edge positions separated by the separator. Further, it is preferable that the protruding magnetic poles are arranged in a radial required range from the central portion of the opposite side surface to the outer peripheral edge at each of the arrangement interval positions of the separator. Further, the protruding magnetic poles are two straight lines arranged in parallel along the separator in a region separated by the separator and the outer peripheral edge, and the straight line at the central end portion of the opposite side surface. It is preferable to have a connecting portion for connecting the inner ends of the portions.

With these, the magnetic pole shape can be made according to the shape of the object to be adsorbed. Further, by bringing the protruding magnetic poles and the magnets in close proximity to each other, magnetic leakage can be reduced, so that the attractive force of the protruding magnetic poles can be further improved.

By adopting the configuration of the magnet holder in the present disclosure, the number of magnetic poles on the side surface opposite to the holder holding surface of the second magnetic plate, which is the suction surface, increases. The rotation angle of the holder on which the magnet is arranged becomes smaller. Therefore, it is possible to reliably switch the suction surface on and off even in a narrow work place.

1A to 1C are a lower perspective view, an upper perspective view, and a bottom view of the magnet holder in the first embodiment. FIG. 2 is a partial perspective plan view of the magnet holder according to the first embodiment. FIG. 3 is a partial perspective plan view showing a state in which the protruding portion of the magnet holder shown in FIG. 2 is switched in the off direction. 4A and 4B show an arrangement of magnets when the attractive force due to the magnetic force of the protruding magnetic pole of the magnet holder is on and an arrangement of magnets when the attractive force due to the magnetic force of the protruding magnetic pole is off in the first embodiment. It is a figure. FIG. 5 is a partially perspective bottom view of the magnet holder in the second embodiment. FIG. 6 is a partially perspective bottom view of the magnet holder according to the third embodiment. FIG. 7 is a partially perspective bottom view of the magnet holder according to the fourth embodiment. 8A and 8B are a partial perspective bottom view showing a modified example of the magnet holder in the first embodiment and a partially perspective bottom view showing a modified example of the magnet holder in the second embodiment. 9A and 9B are a partial perspective bottom view showing a modified example of the magnet holder in the third embodiment and a partially perspective bottom view showing a modified example of the magnet holder in the fourth embodiment. 10A and 10B are a partial perspective plan view and a perspective view of the magnet holder in another embodiment.

Hereinafter, an embodiment of the magnet holder according to the present invention will be described with reference to the drawings.

(First Embodiment)
As shown in FIGS. 1A to 1C, FIGS. 2 and 3, the magnet holder 100 in the present embodiment can rotate the magnet 10, the holder 20 holding the magnet 10, and the holder 20 holding the magnet 10 in a horizontal plane. It is provided with an upper surface side magnetic material plate 30 as a first magnetic material plate and a lower surface side magnetic material plate 40 as a second magnetic material plate to be sandwiched in the thickness direction.

As shown in FIGS. 2 and 3, the magnet 10 has a fan-shaped shape in a plan view, and is formed in the plane direction of the flat plate portion 22A of the flat plate portion 22A of the inner holder 22 which is a part of the holder 20. They are arranged at four locations with a required interval. The magnet 10 in the present embodiment uses a neodymium magnet in the shape of a plan-viewing fan in which magnetic poles are formed in the upper and lower surfaces of the flat plate portion 22A, but the type of the magnet 10 is not particularly limited. The magnets 10 adjacent to each other in the circumferential direction of the flat plate portion 22A (rotational direction of the holder 20) are arranged in a circumferential arrangement with required intervals so that the magnetic poles appearing on the upper surface of the flat plate portion 22A are different from each other.

The holder 20 in which the magnet 10 is housed has an inner holder 22 and an outer holder 24 formed of a non-magnetic material. In the present embodiment, the holder 20 is formed of SUS304, but the holder 20 is not particularly limited as long as it is a non-magnetic material. The inner holder 22 has a flat plate portion 22A having a circular plan view and a protruding portion 22B projecting from the outer peripheral edge of the flat plate portion 22A in the outer diameter direction of the flat plate portion 22A. A plurality of accommodating portions 22C accommodating the magnet 10 are arranged in the flat plate portion 22A along the circumferential direction of the flat plate portion 22A. In the present embodiment, the planar shape of each accommodating portion 22C is formed to have the same planar shape as the planar shape of the magnet 10, and the magnet 10 is accommodated by fitting the magnet 10 into the accommodating portion 22C, but the present embodiment is limited to this embodiment. The specific shape is not limited as long as the magnet 10 can be held without dropping.

The outer holder 24 for accommodating the inner holder 22 is formed in a tray shape in which the flat plate portion accommodating portion 24A for accommodating the flat plate portion 22A of the inner holder 22 is formed. Positioning protrusions 24B that abut on the outer peripheral edge of the flat plate portion 22A are arranged at a plurality of locations on the inner peripheral surface of the flat plate portion accommodating portion 24A, and the protruding portion of the inner holder 22 is provided on one of the side surfaces of the outer holder 24. An opening 24C is formed to allow the 22B to rotate in a horizontal plane. The inner holder 22 housed in such an outer holder 24 rotates the protruding portion 22B protruding outward from the opening 24C in the horizontal plane from the state shown in FIG. 2 to the state shown in FIG. By moving it, it is possible to rotate the flat plate portion 22A in a state where the outer peripheral edge position is positioned by the positioning protrusion 24B.

The holder 20 accommodating the magnet 10 in a state of being rotatable in a horizontal plane is sandwiched by the upper surface side magnetic body plate 30 and the lower surface side magnetic body plate 40 from the thickness direction (upper and lower surfaces) of the holder 20. In the present embodiment, soft iron is used as the upper surface side magnetic material plate 30 and the lower surface side magnetic material plate 40, but the present invention is not limited to the soft iron, and is not particularly limited as long as it is a magnetic material.

The upper surface side magnetic material plate 30 and the lower surface side magnetic material plate 40 are formed in a planar shape slightly larger than the planar shape of the holder 20, and a part of the protruding portion 22B of the holder 20 is formed on the upper surface side magnetic material plate 30 and the lower surface. It is in a state of protruding from the side surface of the side magnetic material plate 40. On the upper surface side of the upper surface side magnetic plate 30, there are an assembly screw hole 32 formed along the outer peripheral edge position and a fixing screw hole 34 formed in the center portion of the upper surface. The assembly screw hole 32 is for integrally assembling the upper surface side magnetic body plate 30, the holder 20, and the lower surface side magnetic body plate 40, and the fixing screw hole 34 is placed on the upper surface of the upper surface side magnetic body plate 30. It is for fixing articles with screws. In the present embodiment, the fixing screw holes 34 are arranged at only one place, but a plurality of fixing screw holes 34 may be arranged on the upper surface of the magnetic material plate 30 on the upper surface side.

On the bottom surface of the lower surface side magnetic plate 40 opposite to the holding surface of the holder 20, there is an assembly screw hole 42 for assembling the lower surface side magnetic plate 40 integrally with the holder 20 and the upper surface side magnetic plate 30. It is arranged. Further, on the bottom surface of the magnetic material plate 40 on the lower surface side, four separators 44 extending radially toward the outer peripheral edge from the center position are formed. The four separators 44 are formed in a cross shape with their starting points common to each other. The separator 44 in the present embodiment is formed by a groove body having a two-step bottom formed on the lower surface side magnetic body plate 40. More specifically, the separator 44 is formed by the shallow bottom and wide first groove body 44A and the deep bottom and narrower second groove body 44B than the first groove body 44A in the central portion in the width direction of the first groove body 44A. It is formed. By forming the separator 44 into a groove having a two-stage bottom structure in this way, processing of the separator 44 at the time of manufacturing becomes easy.

Further, the outer peripheral edge of the lower surface side magnetic material plate 40 in the present embodiment is formed on a protruding magnetic pole 46 protruding from the bottom surface of the lower surface side magnetic material plate 40 as shown by a hatched portion in the bottom surface view of FIG. 1C. ing. In the present embodiment, since the outer peripheral edge is separated by the separator 44 at an intermediate position in the length direction, the protruding magnetic pole 46 is an isosceles trapezoidal L-shape at each corner of the bottom surface of the lower surface side magnetic body plate 40. It is formed in a shape. The protruding magnetic pole 46 is a suction portion by magnetic force, and the suction force can be switched on and off by the rotation operation of the protrusion 22B which is an operation lever.

FIG. 4A is an explanatory diagram showing an arrangement of magnets 10 when the attractive force due to the magnetic force of the protruding magnetic pole 46 is on. Further, FIG. 4B is an explanatory diagram showing an arrangement of magnets 10 when the attractive force due to the magnetic force of the protruding magnetic pole 46 is off. When the attraction force of the protruding magnetic pole 46 is on, the magnet 10 is housed in the flat surface region of the bottom surface of the lower surface side magnetic plate 40 separated by the separator 44 as shown in FIGS. 2 and 4A. There is. The magnetic force lines at this time are in a state where the magnetic force lines are emitted along the protruding direction of the protruding magnetic pole 46 as indicated by the arrow of the two-dot chain line. That is, when the magnetic material is brought close to the protruding magnetic pole 46, sufficient magnetic force lines pass through the magnetic material, and the magnetic material is attracted to the protruding magnetic pole 46.

On the other hand, in the state where the attractive force of the protruding magnetic pole 46 is off, the plane position of the magnet 10 straddles the plane position of the separator 44 as shown in FIGS. 3 and 4B (the plane region of the magnet 10 by the separator 44). Is an arrangement (divided in the rotation direction of the inner holder 22 (holder 20)). As shown by the two-dot chain line, the magnetic force lines at this time are in a state where the magnetic forces are short-circuited between the adjacent magnets 10 in the plane region of the bottom surface of the lower surface side magnetic body plate 40 separated by the separator 44, and the protruding magnetic pole 46 The magnetic force lines are not emitted in the protruding direction of. That is, even if the magnetic material is brought close to the protruding magnetic pole 46, the magnetic force lines hardly pass through the magnetic material, and the magnetic material is not attracted to the protruding magnetic pole 46.

As described above, the magnet holder 100 in the present embodiment can reduce the rotation angle of the protruding portion 22B, which is an operation lever for switching the on / off operation of the suction portion, to about half as compared with the magnet holder in the prior art. As a result, the suction portion can be reliably turned on and off even in a narrow place where it is difficult to switch the suction portion on and off with the magnet holder in the prior art.

(Second Embodiment)
FIG. 5 is a partially perspective bottom view of the magnet holder 100 in the second embodiment. In the present embodiment, the reference numerals used in the first embodiment are used for the configurations common to those in the first embodiment, and detailed description thereof is omitted here. Further, the magnet holder 100 in the present embodiment has the same configuration as the magnet holder 100 in the first embodiment, unless a configuration in a portion not shown in the bottom view is particularly mentioned.

The magnet holder 100 in the present embodiment is different from the configuration of the magnet holder 100 in the first embodiment in that the plan view shape is formed into a regular hexagonal shape. In the magnetic plate 40 on the lower surface side of the magnet holder 100 in the present embodiment, six separators 44 are extended radially toward each apex of the regular hexagon with the central portion as a base point. The protruding magnetic pole 46 in the present embodiment is a straight line formed by projecting the outer peripheral edge of the bottom surface of the lower surface side magnetic plate 40 in advance and dividing the outer peripheral edge protruding at each apex position when the separator 44 is formed. It is formed in a shape. In this way, six triangular planar regions are formed by the separator 44 and the protruding magnetic poles 46, and the flat plate portion 22A of the inner holder 22 has 6 so that the magnet 10 formed in a fan shape can be accommodated in this planar region. Two accommodating portions 22C are arranged.

FIG. 5 shows a state in which the suction force of the protruding magnetic pole 46 is turned on. When the projecting portion 22B is rotated to the OFF position (broken line) in FIG. 5, the flat plate portion 22A rotates around the central portion of the bottom surface of the lower surface side magnetic material plate 40, and the plane position of the magnet 10 is the plane position of the separator 44. The arrangement straddles the plane position, and the attractive force of the protruding magnetic pole 46 is switched off. Since the number of magnetic poles of the magnet holder 100 of the present embodiment is larger than the number of magnetic poles of the magnet holder 100 in the first embodiment, the operation angle may be smaller than the on / off switching operation angle of the protruding magnetic pole 46 in the first embodiment. It is convenient in that it can be done.

(Third Embodiment)
FIG. 6 is a partially perspective bottom view of the magnet holder 100 according to the third embodiment. In the present embodiment, with respect to the configurations common to the first embodiment and the second embodiment, the reference numerals used in the respective embodiments are used, and detailed description thereof is omitted here. Further, the magnet holder 100 in the present embodiment has the same configuration as the magnet holder 100 in the first embodiment and the second embodiment, unless a configuration in a portion not shown in the bottom view is particularly mentioned.

The magnet holder 100 in the present embodiment is different from the configuration of the magnet holder 100 in the first embodiment and the second embodiment in that the plan view shape is formed into a regular octagonal shape. On the bottom surface of the magnetic plate 40 on the lower surface side of the magnet holder 100 in the present embodiment, eight separators 44 are extended radially toward each apex of a regular octagon with the central portion as a base point. The protruding magnetic poles 46 in the present embodiment are arranged at each of the arrangement interval positions of the separator 44 in the plane region separated by the separator 44 and the outer peripheral edge of the bottom surface of the lower surface side magnetic material plate 40. The protruding magnetic poles 46 in the present embodiment are arranged radially over a required range in the radial direction from the central position of the bottom surface of the magnetic plate 40 on the lower surface side to a predetermined position on the outer side in the radial direction as a base point.

FIG. 6 shows a state in which the suction force of the protruding magnetic pole 46 is turned on. When the projecting portion 22B is rotated to the OFF position (broken line) in FIG. 6, the flat plate portion 22A rotates around the central portion of the bottom surface of the lower surface side magnetic material plate 40, and the plane position of the magnet 10 is the plane of the separator 44. The arrangement is such that the positions are straddled, and the attractive force of the protruding magnetic pole 46 is switched off. Since the number of magnetic poles of the magnet holder 100 of the present embodiment is further larger than the number of magnetic poles of the magnet holder 100 in the second embodiment, the operation angle should be smaller than the on / off switching operation angle of the protruding magnetic pole 46 in the second embodiment. It is convenient in that it can be done.

(Fourth Embodiment)
FIG. 7 is a partially perspective bottom view of the magnet holder 100 according to the fourth embodiment. In the present embodiment, with respect to the configurations common to those of the first embodiment to the third embodiment, the reference numerals used in the respective embodiments are used, and detailed description thereof is omitted here. Further, the magnet holder 100 in the present embodiment has the same configuration as the magnet holder 100 in the first to third embodiments, unless a configuration in a portion not shown in the bottom view is particularly mentioned.

The magnet holder 100 in the present embodiment is common to the third embodiment in that the plan view shape is formed into a regular octagonal shape. The same applies to the point that eight separators 44 are radially extended from the central portion to each apex of the regular octagon on the bottom surface of the magnetic plate 40 on the lower surface side of the magnet holder 100 in the present embodiment. .. The protruding magnetic pole 46 in the present embodiment is characterized in that it is formed in a V shape in a plane region separated by the separator 44 and the outer peripheral edge of the bottom surface of the lower surface side magnetic plate 40. Specifically, two straight lines 46A arranged radially to the outer peripheral edge in parallel with the separator 44 at a position adjacent to the separator 44, and two straight lines at the central end of the two straight lines 46A. A protruding magnetic pole 46 is formed by a connecting portion 46B that connects the inner ends of the portions 46A. By forming the protruding magnetic pole 46 in a wide range in this way, it is convenient in that the adsorptionable range can be widened.

FIG. 7 shows a state in which the suction force of the protruding magnetic pole 46 is turned on. When the projecting portion 22B is rotated to the OFF position (broken line) in FIG. 7, the flat plate portion 22A rotates around the central portion of the bottom surface of the lower surface side magnetic material plate 40, and the plane position of the magnet 10 is the plane position of the separator 44. The arrangement straddles the plane position, and the attractive force of the protruding magnetic pole 46 is switched off. Since the number of magnetic poles of the magnet holder 100 of the present embodiment is 8 poles as in the third embodiment, the operation angle can be the same as that of the third embodiment.

Although the magnet holder 100 according to the present invention has been described above based on a plurality of embodiments, the magnet holder 100 according to the present invention is not limited to the above embodiments. For example, in the above embodiments, the form of the magnet holder 100 in a plan view is a regular quadrangle, a regular hexagon, or a regular octagon, but the present invention is not limited to these forms. As the plan view shape of the magnet holder 100, a regular N-sided polygon such as a regular decagon or a regular dodecagon (N is an even number of 4 or more) can be adopted. In the magnet holder 100 of the present invention, when the plan view is formed into a regular N-square shape, N (4 or more even number) separators 44 are extended from the center position of the plane toward each vertex, and the magnet holder 100 is a magnet holder. It suffices that N magnets 10 are evenly spaced in the circumferential direction of the holder 20 with the center position of the plane of 100 as the center.

Further, as shown in FIGS. 8A, 8B, 9A and 9B, the plan view shape of the magnet holder 100 can be circular. 8A is a modification of the first embodiment, FIG. 8B is a modification of the second embodiment, FIG. 9A is a modification of the third embodiment, and FIG. 9B is a modification of the fourth embodiment. This is an example. As shown in FIGS. 8A, 8B, 9A and 9B, when the shape of the magnet holder 100 in a plan view is circular, the accommodating portion 22C is divided into N equal parts in the circumferential direction of the flat plate portion 22A (N is 4 or more). It may be divided into even numbers) and arranged. When the number of protruding magnetic poles 46 (the number of accommodating portions 22C) increases, the magnet holder 100 can reduce the rotation angle of the protruding portions 22B required for switching the attraction force by the magnetic force of the protruding magnetic poles 46 on and off. However, since the suction force of the protruding magnetic pole 46 is reduced, it may be appropriately set according to the required suction force.

Further, in the above embodiment, the magnet 10 whose plan view shape is formed into a fan shape is used, but the plan view shape of the magnet 10 is not limited to the plan view fan shape. It suffices if it can be accommodated in the region separated by the separator 44 formed on the bottom surface opposite to the holding surface of the holder 20 of the lower surface side magnetic material plate 40 and the outer peripheral edge of the lower surface side magnetic material plate 40. , The plan view shape is not particularly limited.

Further, in the above embodiment, the positioning projection 24B is formed on the outer holder 24, but the arrangement of the positioning projection 24B may be omitted. In this case, it is also possible to adopt a form in which the planar shape of the flat plate portion accommodating portion 24A is equal to or slightly larger than the planar shape of the flat plate portion 22A. In short, it suffices if the flat plate portion 22A can be rotated in the horizontal plane while the outer peripheral edge position is substantially maintained.

Further, in the above embodiment, the holder 20 that rotatably holds the magnet 10 around the plane center position of the magnet holder 100 as the axis of rotation is described in the form of having the inner holder 22 and the outer holder 24. It is not limited to the form. A recess corresponding to the flat plate portion accommodating portion 24A for accommodating the inner holder 22 in a rotatable state on the facing surface of at least one inner holder 22 of the upper surface side magnetic plate 30 or the lower surface side magnetic plate 40 (not shown). It is also possible to adopt a form in which the inner holder 22 is housed in this recess. In this recess, a portion corresponding to a positioning protrusion 24B that rotates the outer peripheral edge of the flat plate portion 22A of the inner holder 22 in a positioned state and a protruding portion 22B of the inner holder 22 are projected from the side surface in a horizontal plane. A portion corresponding to the opening 24C for making it rotatable is also formed.

The holder 20 in the above embodiment has a flat plate portion 22A and a protruding portion 22B projecting from the flat plate portion 22A in the out-of-diameter direction, and the protruding portion 22B is rotated in a predetermined direction within the range of the opening portion 24C to project. The attraction force of the magnetic pole 46 is switched on and off, but the present invention is not limited to this mode. For example, as shown in FIGS. 10A and 10B, a screw hole 22D having the same diameter as the fixing screw hole 34 is formed at a position on the axis of the fixing screw hole 34 of the inner holder 22, and a screw is formed at the tip of the insertion side. It is also possible to adopt a form in which the rotating rod 50 in which the above is formed is screwed into the fixing screw hole 34 and the screw hole 22D, and the rotating rod 50 is screwed to the inner holder 22. In the magnet holder 100 of this form, the inner holder 22 can be appropriately rotated inside the outer holder 24 as in other embodiments by manually rotating the rotating rod 50 with a drive source such as a motor or the like. can.

When the form of the magnet holder 100 shown in FIGS. 10A and 10B is adopted, the configuration of the protrusion 22B of the inner holder 22 and the opening 24C of the outer holder 24 can be omitted. By adopting the form of the magnet holder 100, the plane size of the magnet holder 100 can be further reduced as compared with other embodiments. That is, it is convenient in that the protruding magnetic pole 46 can be switched on and off even in a work place where it is difficult to use even in the other embodiments described above.

Further, in the embodiment described above, the form in which the separator 44 is formed by the groove body having the two-step bottom is described, but the form of the separator 44 is not limited to this form. As the separator 44, a form formed by a simple groove body or a form in which a non-magnetic material is embedded in the bottom surface of the lower surface side magnetic material plate 40 can be appropriately adopted.

Then, in addition to the modified examples described above, it is also possible to adopt a form in which the modified examples described in the embodiment are appropriately combined.

Claims

With a magnet
A holder made of a non-magnetic material and formed so that the magnets can be arranged in a circumferential arrangement at required intervals.
A first magnetic material plate and a second magnetic material plate that sandwich the holder in the thickness direction while the holder can be rotated in a horizontal plane.
Four or more even-numbered separators formed on the side surface of the second magnetic plate opposite to the holding surface of the holder and extending from the center position of the opposite side surface toward the outer peripheral edge of the opposite side surface. Equipped with
When facing the opposite side surface, the magnet is housed so that the magnetic poles are the same in the region separated by the separator from the outer peripheral edge of the opposite side surface, and the magnets are adjacent to each other in the rotation direction of the holder. The magnetic poles of the magnet are arranged differently from each other.
The holder is characterized in that the plane region of the magnet is divided by the separator in the rotation direction of the holder and is rotated between a position where the magnet is housed in a position between the separators. Magnet holder.
The magnet holder according to claim 1, wherein the magnet has a fan shape in a plan view.
The magnet holder according to claim 1 or 2, wherein the holder, the first magnetic material plate, and the second magnetic material plate are all formed in a circular shape.
The holder, the first magnetic plate, and the second magnetic plate are all regular N-sided polygons (N is an even number of 4 or more), and the separator is extended toward each vertex of the regular N-sided polygon. The magnet holder according to claim 1 or 2, wherein the magnet holder is made of a magnet holder.
The magnet holder according to any one of claims 1 to 4, wherein the second magnetic plate is provided with a protruding magnetic pole protruding from the opposite side surface.
The magnet holder according to claim 5, wherein the protruding magnetic pole is arranged at an outer peripheral edge position separated by the separator.
The magnet according to claim 5, wherein the protruding magnetic poles are arranged in a radial required range from the central portion of the opposite side surface to the outer peripheral edge at each of the arrangement interval positions of the separator. holder.
The protruding magnetic poles are two straight portions arranged in parallel along the separator in a region separated by the separator and the outer peripheral edge, and the linear portion at the central end portion of the opposite side surface. The magnet holder according to claim 5, further comprising a connecting portion for connecting the inner ends.