JP7420381B2 - magnet holder - Google Patents

Description

The present invention relates to a magnetic holder.

A magnetic holder is suitably used as a temporary mounting base when fixing a jig or a measuring device on an iron surface plate or a machine table. As such a magnet holder, there are known structures such as those disclosed in Non-Patent Documents 1 and 2, for example.

“Kanetec, a comprehensive manufacturer of magnet application equipment, thin permanent magnetic holder stand [MB-L]” [online], Kanetec Co., Ltd., [searched on September 18, 2020], Internet <URL: http://www. kanetec.co.jp/products/mb-l.html> “Kanetec, a comprehensive manufacturer of magnet application equipment, thin permanent magnetic holder stand [MB-L-C]” [online], Kanetec Co., Ltd., [searched on September 18, 2020], Internet <URL: http://www. kanetec.co.jp/products/mb-l-C.html>

The magnet holder disclosed in Non-Patent Documents 1 and 2 rotates a plurality of permanent magnets housed inside the main body in a horizontal plane to change the arrangement with respect to the separator arranged on the bottom of the main body. The suction surface on the bottom of the main unit is switched on and off. In the magnetic holders in Non-Patent Documents 1 and 2, there is only one separator disposed on the bottom of the main body, so the operation lever must be rotated 90 degrees to switch the attraction surface on and off, making it difficult to work in narrow work areas. It is difficult to switch the suction surface on and off.

Therefore, the present invention has been made to solve the above problems, and its objectives are as follows. In other words, by reducing the rotation angle of the holder on which the magnet is installed when switching the attracting surface on and off, we provide a magnetic holder that can reliably switch the attracting surface on and off even in narrow work areas. It's about doing.

As a result of the inventor's intensive research to solve the above problems, he came up with the following configuration. That is, the present invention includes a magnet, a holder made of a non-magnetic material, and formed so that the magnets can be arranged at required intervals in a circumferential arrangement, and a holder in which the holder is rotatable in a horizontal plane. a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction; and a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction; an even number of separators of four or more extending toward an outer peripheral edge of a side surface, and when directly facing the opposite side surface, the magnet is separated by the outer peripheral edge of the opposite side surface and the separator. The magnetic poles of the magnets adjacent to each other in the rotating direction of the holder are arranged differently from each other, and the holder is arranged so that the magnetic poles of the magnets are the same in the region where the magnets are rotated by the separator. The flat area is rotated between a position where the flat area is divided in the rotating direction of the holder and a position where the magnet is housed between the separators , and the second magnetic plate has the opposite side. A protruding magnetic pole is provided that protrudes from the side surface, and the protruding magnetic pole is disposed in a required range in the radial direction from the center portion of the opposite side surface toward the outer peripheral edge at each of the spacing positions of the separator. This is a magnetic holder that is characterized by :

As a result, the number of magnetic poles on the attraction surface of the magnet holder (the side opposite to the holder clamping surface of the second magnetic plate) increases, so the rotation angle when switching the attraction surface on and off is significantly reduced. This makes it possible to reliably switch the suction surface on and off even in narrow work areas. In addition, the magnetism of the magnet can be concentrated in the attraction part, and since the protruding magnetic pole and the magnet are placed close to each other, magnetic leakage can be reduced, and the attraction force of the protruding magnetic pole can be further improved. . Then, when the adsorption force of the adsorption section is turned off, the adsorption section and the object to be adsorbed can be easily separated.

Further, as another invention, there is provided a holder which is made of a magnet and a non-magnetic material and is formed to be able to arrange the magnets in a circumferential arrangement at required intervals, and a state in which the holder is rotatable in a horizontal plane. a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction; and a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction; 4 or more even number separators extending toward the outer periphery of the opposite side, and when directly facing the opposite side, the magnet is separated by the outer periphery of the opposite side and the separators. The magnetic poles of the magnets adjacent to each other in the rotational direction of the holder are arranged differently from each other, and the holder is arranged so that the magnetic poles are the same in the area where the magnets are rotated by the separator. rotates between a position where the flat area of the holder is divided in the rotating direction of the holder and a position where the magnet is housed between the separators, and the second magnetic plate has the opposite side surface. A protruding magnetic pole is provided that protrudes from the separator, and the protruding magnetic pole has two linear portions disposed in parallel along the separator within a region defined by the separator and the outer peripheral edge; There is also a magnet holder characterized in that it has a connecting part that connects the inner ends of the linear parts at the central end of the opposite side.

As a result , the number of magnetic poles on the attraction surface of the magnet holder (the side opposite to the holder clamping surface of the second magnetic plate) will increase, so the rotation angle when switching the attraction surface on and off will be significantly reduced. This makes it possible to reliably switch the suction surface on and off even in narrow work areas. Further, the magnetic pole shape can be made in accordance with the shape of the object to be attracted. Further, by placing the protruding magnetic pole and the magnet close to each other, magnetic leakage can be reduced, so that the attraction force at the protruding magnetic pole can be further improved .

Further, it is preferable that the protruding magnetic pole is disposed at an outer peripheral edge position separated by the separator .

Thereby, the magnetic pole shape can be made in accordance with the shape of the object to be attracted .

Further, as another invention, there is provided a holder which is made of a magnet and a non-magnetic material and is formed to be able to arrange the magnets in a circumferential arrangement at required intervals, and a state in which the holder is rotatable in a horizontal plane. a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction; and a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction; an even number of separators of four or more extending toward the outer peripheral edge of the opposite side, and the holder, the first magnetic plate, and the second magnetic plate each have a regular N-gon shape (N is an even number of 4 or more), the separator extends toward each vertex of the regular N-gon, and when directly facing the opposite side, the magnet is connected to the outer peripheral edge of the opposite side and the The holder is housed so that the magnetic poles are the same in the area separated by the separator, and the magnetic poles of the magnets adjacent in the rotating direction of the holder are arranged differently from each other, and the holder There is also a magnet holder characterized in that the flat area of the magnet is rotated between a position where the flat area of the magnet is divided in the rotating direction of the holder and a position where the magnet is housed between the separators.

As a result, the number of magnetic poles on the attraction surface of the magnet holder (the side opposite to the holder clamping surface of the second magnetic plate) increases, so the rotation angle when switching the attraction surface on and off is significantly reduced. This makes it possible to reliably switch the suction surface on and off even in narrow work areas. Further, the magnet holder can be made into a regular N-gon shape (N is an even number of 4 or more), and can be easily multipolarized.

Further, it is preferable that the magnet has a fan shape in plan view .

Thereby , the magnet accommodated in the holder can be made as large as possible, so the attraction force of the attraction surface can be improved.

By adopting the configuration of the magnetic holder according to the present disclosure, the number of magnetic poles on the opposite side of the holder clamping surface of the second magnetic plate, which is the attracting surface, increases, so that when turning on and off the attracting force on the attracting surface, The rotation angle of the holder in 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 area.

It is a perspective view and a bottom view of a magnet holder in a 1st embodiment. FIG. 3 is a partially transparent plan view of the magnet holder in the first embodiment. FIG. 3 is a partially transparent plan view showing a state in which the protruding portion of the magnet holder shown in FIG. 2 is switched to an OFF direction. Explanatory diagram showing the arrangement of magnets (A) when the attraction force due to the magnetic force of the protruding magnetic poles of the magnet holder is on and the arrangement (B) of the magnets when the attraction force due to the magnetic force of the protruding magnetic poles is off in the first embodiment It is. It is a partially transparent bottom view of the magnet holder in 2nd Embodiment. It is a partially transparent bottom view of the magnet holder in 3rd Embodiment. It is a partially transparent bottom view of the magnet holder in 4th Embodiment. They are a partially transparent bottom view (A) showing a modification of the magnet holder in the first embodiment, and a partially transparent bottom view (B) showing a modification of the magnet holder in the second embodiment. They are a partially transparent bottom view (A) showing a modification of the magnet holder in the third embodiment, and a partially transparent bottom view (B) showing a modification of the magnet holder in the fourth embodiment. It is a partially transparent plan view (A) and a perspective view (B) of a magnet holder in other embodiments.

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

(First embodiment)
As shown in FIGS. 1 to 3, the magnet holder 100 according to the present embodiment includes a magnet 10, a holder 20 that holds the magnet 10, and a holder 20 that holds the magnet 10 in a state in which the holder 20 that holds the magnet 10 is rotatable in a horizontal plane. An upper magnetic plate 30 as a first magnetic plate and a lower magnetic plate 40 as a second magnetic plate are provided.

As shown in FIGS. 2 and 3, the magnet 10 has a sector-like shape in plan view, and extends in the circumferential direction of the flat plate part 22A within the flat area of the flat plate part 22A of the inner holder 22, which is a part of the holder 20. They are placed in four locations at the required intervals. Although the magnet 10 in this embodiment is a neodymium magnet having a fan shape in plan view with magnetic poles formed in the upper and lower directions of the flat plate portion 22A, the type of the magnet 10 is not particularly limited. The magnets 10 that are adjacent to each other in the circumferential direction of the flat plate portion 22A (the rotating direction of the holder 20) are arranged in a circumferential arrangement at a required interval 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 made of a non-magnetic material. Although the holder 20 is made of SUS304 in this embodiment, it is not particularly limited as long as it is made of a non-magnetic material. The inner holder 22 has a flat plate part 22A having a circular shape in plan view and a protruding part 22B that projects from the outer peripheral edge of the flat plate part 22A in a radially outward direction of the flat plate part 22A. A plurality of accommodating portions 22C for accommodating the magnets 10 are arranged in the flat plate portion 22A along the circumferential direction of the flat plate portion 22A. In this embodiment, the planar shape of each accommodating portion 22C is formed to be the same as the planar shape of the magnet 10, and the magnet 10 is accommodated by fitting into the accommodating portion 22C. However, the present invention is not limited to this form. The specific shape is not limited as long as the magnet 10 can be held without falling.

The outer holder 24 that accommodates the inner holder 22 is formed into a tray shape in which a flat plate accommodating portion 24A that accommodates the flat plate portion 22A of the inner holder 22 is formed. Positioning protrusions 24B that come into contact with the outer periphery of the flat plate part 22A are arranged at a plurality of locations on the inner circumferential surface of the flat plate part accommodating part 24A, and a protruding part of the inner holder 22 is provided on one of the side surfaces of the outer holder 24. An opening 24C is formed to enable rotation of 22B in a horizontal plane. The inner holder 22 accommodated in such an outer holder 24 rotates in a horizontal plane from the state shown in FIG. 2 to the state shown in FIG. By moving it, the flat plate part 22A can be rotated with the outer peripheral edge position of the flat plate part 22A being positioned by the positioning protrusion 24B.

The holder 20 that accommodates the magnet 10 in a state where it can rotate in a horizontal plane is held between the upper magnetic plate 30 and the lower magnetic plate 40 from the thickness direction (upper and lower surfaces) of the holder 20. In this embodiment, soft iron is used for the upper magnetic plate 30 and the lower magnetic plate 40, but the material is not limited to soft iron, and is not particularly limited as long as it is a magnetic material.

The upper magnetic plate 30 and the lower magnetic plate 40 are formed in a planar shape that is slightly larger than the planar shape of the holder 20, and a part of the protrusion 22B of the holder 20 is connected to the upper magnetic plate 30 and the lower magnetic plate. It is in a state of protruding from the side surface of the side magnetic plate 40. The upper side of the upper magnetic plate 30 has an assembly screw hole 32 formed along the outer peripheral edge position and a fixing screw hole 34 formed at the center of the upper surface. The assembly screw holes 32 are for assembling the upper magnetic plate 30, the holder 20, and the lower magnetic plate 40 together, and the fixing screw holes 34 are for mounting the upper magnetic plate 30 on the upper surface of the upper magnetic plate 30. It is used for fixing articles with screws. In this embodiment, the fixing screw hole 34 is provided at only one location, but a plurality of fixing screw holes 34 may be provided on the upper surface of the upper magnetic plate 30.

The bottom surface of the lower magnetic plate 40 opposite to the clamping surface of the holder 20 has an assembly screw hole 42 for assembling the lower magnetic plate 40 together with the holder 20 and the upper magnetic plate 30. It is arranged. Furthermore, four separators 44 are formed on the bottom surface of the lower magnetic plate 40 and extend radially toward the outer periphery from the center position. The four separators 44 are formed in a cross shape with their respective starting points common. The separator 44 in this embodiment is formed by a groove having a two-step bottom formed in the lower magnetic plate 40. More specifically, the separator 44 is formed by a first groove body 44A having a shallow bottom and a wide width, and a second groove body 44B having a deeper bottom and a narrower width than the first groove body 44A in the widthwise central portion of the first groove body 44A. It is formed. By forming the separator 44 into a groove with a two-tiered bottom structure in this manner, processing during manufacture of the separator 44 becomes easier.

Further, the outer peripheral edge of the lower magnetic plate 40 in this embodiment is formed into a protruding magnetic pole 46 that protrudes from the bottom surface of the lower magnetic plate 40, as shown by the hatched area in the bottom view of FIG. ing. In this embodiment, since the outer periphery is separated by the separator 44 at an intermediate position in the length direction, the protruding magnetic poles 46 are arranged in an equilegged L-shape at each corner position of the bottom surface of the lower magnetic plate 40. formed into a shape. The protruding magnetic pole 46 is a magnetic attraction part, and the attraction force is turned on and off by rotating the protrusion part 22B, which is an operating lever.

FIG. 4 is an explanatory diagram showing the arrangement (A) of the magnets 10 when the attraction force due to the magnetic force of the protruding magnetic pole 46 is on, and the arrangement (B) of the magnet 10 when the attraction force due to the magnetic force of the protruding magnetic pole 46 is off. It is. When the attraction force of the protruding magnetic pole 46 is on, the magnet 10 is housed within the plane area of the bottom surface of the lower magnetic plate 40 separated by the separator 44, as shown in FIGS. 2 and 4(A). It has become. At this time, the lines of magnetic force are emitted along the protruding direction of the protruding magnetic pole 46 as shown by the two-dot chain arrow. That is, when a magnetic body is brought close to the protruding magnetic pole 46, sufficient lines of magnetic force will pass through the magnetic body, and the magnetic body will be attracted to the protruding magnetic pole 46.

On the other hand, when the attraction force of the protruding magnetic pole 46 is off, the planar position of the magnet 10 crosses the planar position of the separator 44 as shown in FIGS. 3 and 4(B). The plane area is divided in the rotational direction of the inner holder 22 (holder 20). At this time, as shown by the two-dot chain line, the lines of magnetic force are short-circuited between adjacent magnets 10 within the plane area of the bottom surface of the lower magnetic plate 40 separated by the separator 44, and the protruding magnetic pole 46 No lines of magnetic force are emitted in the protruding direction. That is, even if a magnetic body is brought close to the protruding magnetic pole 46, almost no lines of magnetic force pass through the magnetic body, and the magnetic body is not attracted to the protruding magnetic pole 46.

In this way, the magnet holder 100 according to the present embodiment can reduce the rotation angle of the protrusion 22B, which is the operating lever for switching the on/off operation of the suction section, to about half that of the conventional magnet holder. This makes it possible to reliably turn on and off the suction section even in a narrow space where it would be difficult to turn on and off the suction section with conventional magnetic holders.

(Second embodiment)
FIG. 5 is a partially transparent bottom view of the magnet holder 100 in the second embodiment. In this embodiment, the reference numerals used in the first embodiment are used for components common to the first embodiment, and detailed explanations thereof are omitted here. In addition, unless otherwise mentioned, the structure of parts not shown in the bottom view is the same as that of the magnet holder 100 of the first embodiment.

The magnet holder 100 in this embodiment differs from the structure of the magnet holder 100 in the first embodiment in that the shape in plan view is formed into a regular hexagonal shape. In the lower magnetic plate 40 of the magnet holder 100 in this embodiment, six separators 44 extend radially from the central portion toward each vertex of a regular hexagon. The protruding magnetic pole 46 in this embodiment is a straight line formed by protruding the outer periphery of the bottom surface of the lower magnetic plate 40 in advance and dividing the protruding outer periphery at each vertex position when forming the separator 44. It is formed in the shape of In this way, six triangular planar areas are formed by the separator 44 and the protruding magnetic poles 46, and the flat plate part 22A of the inner holder 22 has six triangular planar areas so that the fan-shaped magnet 10 can be accommodated in these planar areas. Two accommodating portions 22C are provided.

FIG. 5 shows a state in which the attraction force of the protruding magnetic pole 46 is turned on. When the protruding portion 22B is rotated to the OFF position (broken line) in FIG. The arrangement is such that it straddles the plane position, and the attraction force of the protruding magnetic poles 46 is switched off. Since the number of magnetic poles of the magnet holder 100 of this embodiment is greater than the number of magnetic poles of the magnet holder 100 of the first embodiment, it is possible to make the operation angle 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 transparent bottom view of the magnet holder 100 in the third embodiment. In this embodiment, for the configurations common to the first embodiment and the second embodiment, detailed explanations are omitted here by using the reference numerals used in each embodiment. In addition, unless otherwise noted, the structure of parts not shown in the bottom view is the same as that of the magnet holder 100 of the first embodiment and the second embodiment.

The magnet holder 100 in this embodiment differs from the structure of the magnet holder 100 in the first and second embodiments in that the shape in plan view is formed into a regular octagonal shape. On the bottom surface of the lower magnetic plate 40 of the magnet holder 100 in this embodiment, eight separators 44 extend radially from the central portion toward each vertex of a regular octagon. The protruding magnetic poles 46 in this embodiment are disposed at each of the spacing positions of the separators 44 in a plane region defined by the separators 44 and the outer peripheral edge of the bottom surface of the lower magnetic plate 40 . The protruding magnetic poles 46 in this embodiment are arranged radially over a predetermined range in the radial direction from the center position of the bottom surface of the lower magnetic plate 40 to the outer peripheral edge from a predetermined position on the radially outer side.

FIG. 6 shows a state in which the attraction force of the protruding magnetic pole 46 is turned on. When the protruding portion 22B is rotated to the OFF position (broken line) in FIG. The arrangement is such that the protruding magnetic poles 46 are arranged across positions, and the attractive force of the protruding magnetic poles 46 is switched off. Since the number of magnetic poles of the magnet holder 100 of this embodiment is even greater than the number of magnetic poles of the magnet holder 100 of 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. This is advantageous in that it allows you to

(Fourth embodiment)
FIG. 7 is a partially transparent bottom view of the magnet holder 100 in the fourth embodiment. In this embodiment, for the configurations common to the first to third embodiments, the same reference numerals used in the respective embodiments are used, and detailed explanations thereof are omitted here. Furthermore, unless otherwise noted, the structure of parts not shown in the bottom view is the same as that of the magnet holder 100 of the first to third embodiments.

The magnet holder 100 in this embodiment is common to the third embodiment in that the shape in plan view is formed into a regular octagonal shape. Similarly, on the bottom surface of the lower magnetic plate 40 of the magnet holder 100 in this embodiment, eight separators 44 are provided extending radially from the central portion toward each vertex of the regular octagon. . The protruding magnetic pole 46 in this embodiment is characterized in that it is formed in a V-shape in a plane region defined 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 arranged radially parallel to the separator 44 up to the outer peripheral edge at positions adjacent to the separator 44, and two straight line portions are arranged at the central end of the two straight line portions 46A. A protruding magnetic pole 46 is formed by a connecting portion 46B that connects the inner end portions of the portion 46A. By forming the protruding magnetic poles 46 over a wide range in this way, it is advantageous in that the range in which they can be attracted can be expanded.

FIG. 7 shows a state in which the attraction force of the protruding magnetic pole 46 is turned on. When the protruding portion 22B is rotated to the OFF position (broken line) in FIG. The arrangement is such that it straddles the plane position, and the attraction force of the protruding magnetic poles 46 is switched off. Since the number of magnetic poles of the magnet holder 100 of this embodiment is 8 as in the third embodiment, the same operating angle as in the third embodiment can be achieved.

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 plan view shape of the magnet holder 100 is a regular square, a regular hexagon, and a regular octagon, but the present invention is not limited to these shapes. The planar view shape of the magnet holder 100 may be a regular N-gon (N is an even number of 4 or more) such as a regular decagon or a regular dodecagon. When the magnet holder 100 according to the present invention is formed into a regular N-gon shape in plan view, N separators 44 (an even number of 4 or more) are extended from the center position of the plane toward each vertex, and the magnet holder It is sufficient that N magnets 10 are arranged at equal intervals in the circumferential direction of the holder 20 with the central position of the holder 20 as the center.

Further, as shown in FIGS. 8 and 9, the shape of the magnet holder 100 in plan view may be circular. Note that FIG. 8(A) is a modification of the first embodiment, FIG. 8(B) is a modification of the second embodiment, and FIG. 9(A) is a modification of the third embodiment. FIG. 9(B) is a modification of the fourth embodiment. As shown in FIGS. 8 and 9, when the plan view shape of the magnet holder 100 is circular, the accommodating portion 22C is divided into N equal parts (N is an even number of 4 or more) in the circumferential direction of the flat plate portion 22A. All you have to do is set it up. In the magnet holder 100, when the number of protruding magnetic poles 46 (the number of accommodating parts 22C) increases, it is possible to reduce the rotation angle of the protruding parts 22B required when switching on and off the attraction force due to the magnetic force of the protruding magnetic poles 46. However, since the attraction force of the protruding magnetic pole 46 is reduced, it may be set appropriately according to the required attraction force.

Further, in the above embodiments, the magnet 10 having a fan shape in plan view is used, but the shape of the magnet 10 in plan view is not limited to the fan shape in plan view. It is only necessary that it can be accommodated in an area separated by the separator 44 formed on the bottom surface of the lower magnetic plate 40 that is opposite to the clamping surface of the holder 20 and the outer peripheral edge of the lower magnetic plate 40. , the shape in plan view is not particularly limited.

Further, in the above embodiment, the positioning protrusion 24B is formed on the outer holder 24, but the positioning protrusion 24B may be omitted. In this case, it is also possible to adopt a configuration 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 is sufficient if the flat plate portion 22A can be rotated in a horizontal plane while substantially maintaining the outer peripheral edge position of the flat plate portion 22A.

Furthermore, in the above embodiments, the holder 20 that holds the magnet 10 rotatably about the plane center position of the magnet holder 100 as an axis of rotation has been described as having an inner holder 22 and an outer holder 24. It is not limited to the form. A recess (not shown) corresponding to the flat plate housing portion 24A that rotatably accommodates the inner holder 22 on the surface of at least one of the upper magnetic plate 30 and the lower magnetic plate 40 facing the inner holder 22. It is also possible to adopt a configuration in which the inner holder 22 is accommodated in the recessed portion. Note that this recess includes 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 portion that protrudes from the side surface of the protruding portion 22B of the inner holder 22 so that the outer peripheral edge of the flat plate portion 22A of the inner holder 22 is rotated in a horizontal plane. A portion corresponding to the opening 24C for enabling rotation is also formed.

The holder 20 in the above embodiment has a flat plate part 22A and a protruding part 22B that protrudes in a radially outward direction of the flat plate part 22A. Although the attraction force of the magnetic pole 46 is switched on and off, it is not limited to this form. For example, as shown in FIG. 10, a screw hole 22D having the same diameter as the fixing screw hole 34 is formed on the axis of the fixing screw hole 34 of the inner holder 22, and a screw is formed at the insertion side tip. It is also possible to adopt a configuration in which the rotating rod 50 is screwed into the fixing screw hole 34 and the screw hole 22D, and the rotating rod 50 is screwed into the inner holder 22. In the magnet holder 100 of this embodiment, the inner holder 22 can be appropriately rotated inside the outer holder 24 similarly to other embodiments by rotating the rotating rod 50 by a drive source such as a motor or manually. can.

In addition, when the form of the magnet holder 100 shown in FIG. 10 is adopted, the structure of the protrusion part 22B of the inner holder 22 and the opening part 24C of the outer holder 24 can be omitted. By adopting this form of the magnet holder 100, the planar size of the magnet holder 100 can be further reduced in space compared to other embodiments. That is, even in the other embodiments described above, it is advantageous in that the protruding magnetic pole 46 can be switched on and off even in work areas where use is difficult.

Further, in the embodiment described above, the separator 44 is formed of a groove having a two-step bottom, but the form of the separator 44 is not limited to this form. The separator 44 may be formed of a simple groove or may have a non-magnetic material embedded in the bottom surface of the lower magnetic plate 40, as appropriate.

In addition to the modified examples described above, it is also possible to adopt a mode in which the modified examples described in the embodiments are combined as appropriate.

10 Magnet 20 Holder 22 Inner holder 22A Flat plate part 22B Projection part 22C Accommodating part 22D Screw hole 24 Outer holder 24A Flat plate part accommodating part 24B Positioning protrusion 24C Opening part 30 Top side magnetic plate (first magnetic plate)
32 Assembly screw hole 34 Fixing screw hole 40 Lower side magnetic plate (second magnetic plate)
42 Assembly screw hole 44 Separator 44A First groove body 44B Second groove body 46 Projecting magnetic pole 46A Straight section 46B Connecting section 50 Rotating rod 100 Magnet holder

Claims (5)

magnet and
a holder made of a non-magnetic material and configured to allow the magnets to be arranged at required intervals in a circumferential arrangement;
a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction while allowing the holder to rotate in a horizontal plane;
an even number of four or more separators formed on a side of the second magnetic plate opposite to the holding surface of the holder and extending from a center position of the opposite side toward an outer peripheral edge of the opposite side; Equipped with
When directly facing the opposite side, the magnets are housed so that their magnetic poles are the same in a region separated by the outer periphery of the opposite side and the separator, and are adjacent to each other in the rotating direction of the holder. the magnetic poles of the matching magnets are arranged differently from each other;
The holder rotates between a position where the flat area of the magnet is divided by the separator in the rotational direction of the holder and a position where the magnet is housed between the separators,
The second magnetic plate is provided with a protruding magnetic pole protruding from the opposite side,
The magnetic holder is characterized in that the protruding magnetic poles are disposed in a required range in the radial direction from the center portion of the opposite side surface toward the outer peripheral edge at each of the spacing positions of the separator. magnet and
a holder made of a non-magnetic material and configured to allow the magnets to be arranged at required intervals in a circumferential arrangement;
a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction while allowing the holder to rotate in a horizontal plane;
an even number of four or more separators formed on a side of the second magnetic plate opposite to the holding surface of the holder and extending from a center position of the opposite side toward an outer peripheral edge of the opposite side; Equipped with
When directly facing the opposite side, the magnets are housed so that their magnetic poles are the same in a region separated by the outer periphery of the opposite side and the separator, and are adjacent to each other in the rotating direction of the holder. the magnetic poles of the matching magnets are arranged differently from each other;
The holder rotates between a position where the flat area of the magnet is divided by the separator in the rotation direction of the holder and a position where the magnet is housed between the separators,
The second magnetic plate is provided with a protruding magnetic pole protruding from the opposite side,
The protruding magnetic pole has two linear portions arranged in parallel along the separator within a region separated by the separator and the outer peripheral edge, and one linear portion at the center end of the opposite side. A magnet holder characterized in that it has a connecting portion that connects the inner end portions to each other. 3. The magnet holder according to claim 1, wherein the protruding magnetic pole is disposed at an outer peripheral edge position separated by the separator. magnet and
a holder made of a non-magnetic material and configured to allow the magnets to be arranged at required intervals in a circumferential arrangement;
a first magnetic plate and a second magnetic plate that sandwich the holder in the thickness direction while allowing the holder to rotate in a horizontal plane;
an even number of four or more separators formed on a side surface of the second magnetic plate opposite to the clamping surface of the holder and extending from a center position of the opposite side surface toward an outer peripheral edge of the opposite side surface; Equipped with
The holder, the first magnetic plate, and the second magnetic plate each have a regular N-gon shape (N is an even number of 4 or more), and the separator extends toward each vertex of the regular N-gon shape. and
When directly facing the opposite side, the magnets are housed so that their magnetic poles are the same in a region separated by the outer periphery of the opposite side and the separator, and are adjacent to each other in the rotating direction of the holder. the magnetic poles of the matching magnets are arranged differently from each other;
The holder is characterized in that it rotates between a position where the flat area of the magnet is divided by the separator in the rotational direction of the holder and a position where the magnet is housed between the separators. magnetic holder. 5. The magnet holder according to claim 4, wherein the magnet has a fan shape in plan view.

Images