Magnetic retainer

Abstract

The objective of this invention is to provide a magnetic holding member that can reliably switch between adsorption and desorption on the adsorption surface even in confined work spaces. As a solution, the magnetic retainer (100) is characterized by comprising: a magnet (10); a retainer (20) which allows the magnet (10) to be arranged at a desired interval in the circumferential direction; an upper surface magnetic plate (30) and a lower surface magnetic plate (40) which clamp the retainer (20) so that it can rotate; and a separator (44) which is formed on the lower surface magnetic plate (40) of the retainer (20), extending from the center position of the lower surface towards the outer periphery, and when facing the lower surface, the magnet (10) is housed in the area divided by the outer periphery of the lower surface and the separator (44), such that the magnetic poles of adjacent magnets (10) in the circumferential direction of the flat plate (22A) are different, and the retainer (20) rotates between a position in which the planar area of ​​the magnet (10) is divided in the rotation direction of the retainer (20) by the separator (44) and a position in which the magnet (10) is housed between the separators (44).

Description

Technical Field

[0001] This invention relates to a magnetic retainer. Background Technology

[0002] Magnetic retainers are suitable as temporary mounting platforms for fixing fixtures or measuring devices on iron platforms or machine benches. For example, structures disclosed in Non-Patent Documents 1 and 2 are known as such magnetic retainers.

[0003] Existing technical documents

[0004] Non-patent literature

[0005] Non-Patent Document 1: "Kanatec Thin Permanent Magnet Holding Stage [MB-L], a comprehensive manufacturer of magnetic application equipment" [online], Kannettec Corporation, [Searched on September 18, 2003], Internet <URL: http: / / www.kanetec.co.jp / products / mb-l.html>

[0006] Non-Patent Document 2: "Kanatec Thin Permanent Magnet Holding Stage [MB-LC], a comprehensive manufacturer of magnetic application equipment" [online], Kannettec Corporation, [Searched on September 18, 2003], Internet <URL: http: / / www.kanetec.co.jp / products / mb-lC.html> Summary of the Invention

[0007] The problem the invention aims to solve

[0008] The magnetic retaining components disclosed in Non-Patent Documents 1 and 2 change the arrangement of multiple permanent magnets housed inside the main body in a horizontal plane, thereby switching the adsorption / desorption of the adsorption surface on the bottom surface of the main body. In the magnetic retaining components of Non-Patent Documents 1 and 2, there is only one partition on the bottom surface of the main body. Therefore, the adsorption / desorption switching operation of the adsorption surface requires rotating the operating lever by 90 degrees, which is difficult in confined working spaces.

[0009] Solution for solving the problem

[0010] Therefore, the present invention was made to solve the above-mentioned problems, and its objective is as follows: to provide a magnetic holding member in which the rotation angle of the holding member equipped with a magnet is reduced during the adsorption / desorption switching of the adsorption surface, thereby enabling reliable adsorption / desorption switching of the adsorption surface even in narrow working environments.

[0011] To solve the above problems, the inventors conducted in-depth research and came up with the following structure. That is, the present invention is a magnetic retaining member, characterized in that it comprises: a magnet; a retaining member, which is made of a non-magnetic body and is configured to allow the magnet to be arranged in a circumferential manner with required intervals; a first magnetic body plate and a second magnetic body plate, which clamp the retaining member in the thickness direction in a state that allows the retaining member to rotate in a horizontal plane; and four or more even-numbered spacers, which are formed on the opposite side of the second magnetic body plate opposite to the clamping surface of the retaining member, extending from the center of the opposite side towards the outer periphery of the opposite side, and when facing the opposite side, the magnets are housed in the area divided by the outer periphery of the opposite side and the spacers in a manner with the same magnetic poles, and are configured such that the magnetic poles of adjacent magnets in the rotation direction of the retaining member are different from each other, and the retaining member rotates between a position in which the planar area of ​​the magnet is divided in the rotation direction of the retaining member by the spacers and a position in which the magnets are housed between the spacers.

[0012] As a result, the number of magnetic poles on the adsorption surface of the magnetic retainer (the surface of the second magnetic plate opposite to the holding surface of the retainer) increases, thus significantly reducing the rotation angle when switching between adsorption and desorption on the adsorption surface, enabling reliable switching between adsorption and desorption on the adsorption surface even in narrow work areas.

[0013] Furthermore, it is preferable that the magnet has a fan-shaped top view.

[0014] Therefore, the magnet housed in the retainer can be enlarged as much as possible, thus increasing the adsorption force of the adsorption surface.

[0015] Preferably, the retaining member, the first magnetic plate, and the second magnetic plate are all circular. Also preferably, the retaining member, the first magnetic plate, and the second magnetic plate are all regular N-gons (N is an even number of 4 or more), and the separator extends toward each vertex of the regular N-gon.

[0016] Therefore, magnetic retainers that can be set to a circular shape or a positive N-sided shape (where N is an even number of 4 or more) can be easily set to multipolarity.

[0017] Furthermore, it is preferable that the second magnetic plate has protruding magnetic poles that protrude from the opposite side.

[0018] This allows the magnetism of the magnet to be concentrated in the adsorption section, further increasing the adsorption force. Furthermore, when the adsorption force of the adsorption section is set to desorption, separation between the adsorption section and the adsorbed object becomes easier.

[0019] Furthermore, preferably, the protruding magnetic poles are disposed at the outer periphery position defined by the separator. Furthermore, preferably, the protruding magnetic poles are disposed at intervals on the separator within a desired radial range from the central portion of the opposite side towards the outer periphery. Furthermore, preferably, the protruding magnetic poles have two straight portions disposed parallel to the separator along the separator within the region defined by the separator and the outer periphery, and a connecting portion connecting the inner ends of the straight portions to each other at the central end of the opposite side.

[0020] Therefore, the magnetic pole shape can be set to correspond to the shape of the adsorbed object. Furthermore, by bringing the protruding magnetic pole and the magnet closer together, magnetic leakage can be reduced, thereby further improving the adsorption force of the protruding magnetic pole.

[0021] The effects of the invention

[0022] By adopting the structure of the magnetic holding member disclosed herein, the number of magnetic poles on the side of the second magnetic plate opposite to the holding member's clamping surface, which serves as the adsorption surface, is increased. Therefore, the rotation angle of the holding member equipped with the magnet is reduced during the adsorption / desorption operation of the adsorption surface. Consequently, adsorption / desorption switching of the adsorption surface can be reliably performed even in confined work areas. Attached Figure Description

[0023] Figure 1 A~ Figure 1 C is a lower perspective view, a higher perspective view, and a bottom view of the magnetic retaining member according to the first embodiment.

[0024] Figure 2 This is a partial perspective top view of the magnetic retaining member according to the first embodiment.

[0025] Figure 3 It means to Figure 2 A partial perspective top view of the magnetic retainer protrusion switched to the desorption direction.

[0026] Figure 4 A and Figure 4 B is an explanatory diagram showing the arrangement of magnets when attracted by the magnetic force generated by the magnetic force of the protruding magnetic pole of the magnetic holding member in the first embodiment, and the arrangement of magnets when desorbed by the magnetic force generated by the magnetic force of the protruding magnetic pole.

[0027] Figure 5 This is a partial perspective bottom view of the magnetic retaining member of the second embodiment.

[0028] Figure 6 This is a partial perspective bottom view of the magnetic retaining member of the third embodiment.

[0029] Figure 7This is a partial perspective bottom view of the magnetic retaining member according to the fourth embodiment.

[0030] Figure 8 A and Figure 8 B is a partial perspective bottom view showing a modified example of the magnetic retaining member of the first embodiment and a partial perspective bottom view showing a modified example of the magnetic retaining member of the second embodiment.

[0031] Figure 9 A and Figure 9 B is a partial perspective bottom view showing a modified example of the magnetic retaining member of the third embodiment and a partial perspective bottom view showing a modified example of the magnetic retaining member of the fourth embodiment.

[0032] Figure 10 A and Figure 10 B is a partial perspective top view and perspective view of the magnetic retaining member in other embodiments. Detailed Implementation

[0033] Hereinafter, embodiments of the magnetic retaining member of the present invention will be described with reference to the accompanying drawings.

[0034] (First Embodiment)

[0035] like Figure 1 A~ Figure 1 C Figure 2 and Figure 3 As shown, the magnetic holding member 100 of this embodiment includes a magnet 10, a holding member 20 for holding the magnet 10, and an upper surface magnetic plate 30 serving as a first magnetic plate and a lower surface magnetic plate 40 serving as a second magnetic plate, which clamp the holding member 20 holding the magnet 10 in a state that allows it to rotate in the horizontal plane in the thickness direction.

[0036] like Figure 2 and Figure 3 As shown, the magnet 10 has a fan-shaped top view, and it is arranged at four locations in the planar region of the flat plate portion 22A of the inner retainer 22, which is part of the retainer 20, with the distance between them being required in the circumferential direction of the flat plate portion 22A. The magnet 10 in this embodiment uses a neodymium magnet with magnetic poles formed on the upper and lower surfaces of the flat plate portion 22A in a fan-shaped top view, but the type of magnet 10 is not particularly limited. Adjacent magnets 10 in the circumferential direction of the flat plate portion 22A (the rotation direction of the retainer 20) are arranged in a circular pattern with the distance between them being required, such that the magnetic poles presented on the upper surface of the flat plate portion 22A are different from each other.

[0037] The retaining member 20, which houses the magnet 10, has an inner retaining member 22 and an outer retaining member 24 formed of a non-magnetic material. In this embodiment, the retaining member 20 is formed of SUS304, but there is no particular limitation as long as it is a non-magnetic material. The inner retaining member 22 has a flat plate portion 22A that is circular in plan view and a protrusion portion 22B that protrudes radially outward from the outer periphery of the flat plate portion 22A. A plurality of receiving portions 22C for housing the magnet 10 are arranged along the circumference of the flat plate portion 22A. 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, and the magnet 10 is housed by fitting it into the receiving portion 22C, but this shape is not limited, as long as it can keep the magnet 10 from falling out, the specific shape is not limited.

[0038] The outer retainer 24, which houses the inner retainer 22, is formed in the shape of a tray with a flat plate housing portion 24A, which houses the flat plate portion 22A of the inner retainer 22. Positioning protrusions 24B, which abut against the outer periphery of the flat plate portion 22A, are provided at multiple locations on the inner circumferential surface of the flat plate housing portion 24A. An opening 24C is formed on one side of the outer retainer 24, allowing the protrusion 22B of the inner retainer 22 to rotate in the horizontal plane. The inner retainer 22, housed in such an outer retainer 24, is supported by the protrusion 22B that extends from the opening 24C to the outside of the outer retainer 24. Figure 2 The state shown rotates in the horizontal plane as follows Figure 3 In the state shown, the inner retainer 22 can be rotated while the outer periphery of the flat plate portion 22A is positioned using the positioning protrusion 24B.

[0039] A retainer 20, which houses the magnet 10 in a state that allows it to rotate in a horizontal plane, is clamped from the thickness direction (upper and lower surfaces) of the retainer 20 by an upper surface magnetic plate 30 and a lower surface magnetic plate 40. In this embodiment, the upper surface magnetic plate 30 and the lower surface magnetic plate 40 are made of soft iron, but are not limited to soft iron; there is no particular limitation as long as they are magnetic materials.

[0040] The upper surface magnetic plate 30 and the lower surface magnetic plate 40 are formed into planar shapes slightly larger than the planar shape of the retainer 20, protruding from the side of the upper surface magnetic plate 30 and the side of the lower surface magnetic plate 40 as part of the protrusion 22B of the retainer 20. The upper surface magnetic plate 30 has an assembly threaded hole 32 formed along its outer periphery and a fixing threaded hole 34 formed in the central portion of its upper surface. The assembly threaded hole 32 is used to integrally assemble the upper surface magnetic plate 30 with the retainer 20 and the lower surface magnetic plate 40, and the fixing threaded hole 34 is used to thread-fix an article placed on the upper surface of the upper surface magnetic plate 30. In this embodiment, the fixing threaded hole 34 is provided in only one location, but multiple fixing threaded holes 34 may also be provided on the upper surface of the upper surface magnetic plate 30.

[0041] A threaded hole 42 for assembly is provided on the bottom surface of the lower surface magnetic plate 40, opposite to the clamping surface of the retainer 20. This threaded hole 42 is used to integrally assemble the lower surface magnetic plate 40 with the retainer 20 and the upper surface magnetic plate 30. Furthermore, four separators 44 are formed on the bottom surface of the lower surface magnetic plate 40, extending radially outward from the center point. The four separators 44 are formed in a cross shape with their starting points shared. In this embodiment, the separator 44 is formed by a groove with a double bottom formed on the lower surface magnetic plate 40. More specifically, the separator 44 is formed by a first groove 44A with a shallow bottom and a wider width, and a second groove 44B located at the center of the width direction of the first groove 44A, which is deeper and narrower than the first groove 44A. By making the separator 44 a groove with a double bottom structure, the manufacturing process of the separator 44 is simplified.

[0042] Furthermore, the outer periphery of the lower surface side magnetic plate 40 in this embodiment is as follows: Figure 1 The shaded portion of the bottom view of C shows protruding magnetic poles 46 extending from the bottom surface of the lower surface magnetic plate 40. In this embodiment, since the outer periphery is separated by a separator 44 at the midpoint of its length, the protruding magnetic poles 46 are formed in isosceles L-shapes at each corner of the bottom surface of the lower surface magnetic plate 40. The protruding magnetic poles 46 are adsorption portions that generate attraction through magnetic force, and the adsorption / desorption force is switched by rotating the protrusion 22B, which serves as an operating lever.

[0043] Figure 4 A is an explanatory diagram showing the arrangement of magnets 10 when attracted by the magnetic force generated by the protruding magnetic poles 46. Furthermore, Figure 4B is an explanatory diagram showing the arrangement of magnets 10 during desorption due to the attraction force generated by the magnetic force of the protruding magnetic poles 46. In the state of adsorption by the attraction force of the protruding magnetic poles 46, as... Figure 2 and Figure 4 As shown in Figure A, the magnet 10 is housed within the planar region separated by the separator 44 on the bottom surface of the lower surface magnetic plate 40. At this time, the magnetic field lines, as indicated by the double-dotted arrow, are released along the protruding direction of the protruding magnetic pole 46. That is, when the magnetic body is brought close to the protruding magnetic pole 46, sufficient magnetic field lines pass through the magnetic body, and the magnetic body is attracted by the protruding magnetic pole 46.

[0044] In contrast, under the state of desorption due to the attraction force of the prominent magnetic pole 46, such as Figure 3 and Figure 4 As shown in Figure B, the planar positions of the magnets 10 are arranged across the planar positions of the separator 44 (the planar regions of the magnets 10 are divided by the separator 44 in the rotational direction of the inner retainer 22 (retainer 20)). At this time, as shown by the double-dotted line, adjacent magnets 10 are magnetically short-circuited within the planar region separated by the separator 44 on the bottom surface of the lower surface magnetic plate 40, and the magnetic lines of force are not released along the protruding direction of the protruding magnetic pole 46. That is, even when a magnetic body is brought close to the protruding magnetic pole 46, the magnetic lines of force hardly pass through the magnetic body, and the magnetic body is not attracted by the protruding magnetic pole 46.

[0045] Thus, compared with conventional magnetic retainers, the magnetic retainer 100 of this embodiment allows the rotation angle of the operating lever, i.e., the protrusion 22B, for switching the adsorption / desorption operation of the adsorption section to be halved. Therefore, even in confined spaces where switching the adsorption / desorption of the adsorption section is difficult with conventional magnetic retainers, the adsorption / desorption operation of the adsorption section can be reliably performed.

[0046] (Second Implementation)

[0047] Figure 5 This is a partial perspective bottom view of the magnetic retainer 100 according to the second embodiment. In this embodiment, the reference numerals used in the first embodiment are used for structures common to the first embodiment, and detailed descriptions are omitted here. Furthermore, for structures not shown in the bottom view, unless specifically mentioned, the magnetic retainer 100 of this embodiment has the same structure as the magnetic retainer 100 of the first embodiment.

[0048] The magnetic retainer 100 of this embodiment differs from the magnetic retainer 100 of the first embodiment in that its top view shape is a regular hexagon. In this embodiment, the magnetic plate 40 on the lower surface side of the magnetic retainer 100 has six separators 44 extending radially from the central portion toward each vertex of the regular hexagon. The protruding magnetic poles 46 of this embodiment are formed in a straight line, which is achieved by pre-protruding the outer periphery of the bottom surface of the lower surface side magnetic plate 40 and dividing the protruding outer periphery at each vertex position when forming the separators 44. Thus, the separators 44 and the protruding magnetic poles 46 form six triangular planar regions. To accommodate the fan-shaped magnets 10 within these planar regions, six storage portions 22C are provided on the flat plate portion 22A of the inner retainer 22.

[0049] Figure 5 This illustrates the state where the attraction force of the protruding magnetic pole 46 is set to attraction. When the protrusion 22B is directed towards... Figure 5 When the desorption position (dashed line) rotates, the magnetic plate 40 on the lower surface of the flat plate 22A rotates around the center of the bottom surface, so that the planar position of the magnet 10 crosses the planar position of the separator 44, and the attraction force of the protruding magnetic pole 46 switches to desorption. Since the number of magnetic poles of the magnetic holding member 100 in this embodiment is greater than that of the magnetic holding member 100 in the first embodiment, it is more convenient to set the operating angle to be smaller than the attraction / desorption switching operating angle of the protruding magnetic pole 46 in the first embodiment.

[0050] (Third Implementation)

[0051] Figure 6 This is a partial perspective bottom view of the magnetic retainer 100 according to the third embodiment. In this embodiment, the reference numerals used in the various embodiments are used for structures common to the first and second embodiments, thus omitting detailed descriptions here. Furthermore, for structures not shown in the bottom view, unless specifically mentioned, the magnetic retainer 100 of this embodiment has the same structure as the magnetic retainer 100 of the first and second embodiments.

[0052] The magnetic retainer 100 of this embodiment differs from the magnetic retainers 100 of the first and second embodiments in that its top view shape is a regular octagon. In this embodiment, eight spacers 44 are radially arranged on the bottom surface of the lower surface magnetic plate 40, extending from the central portion towards each vertex of the regular octagon. The protruding magnetic poles 46 of this embodiment are disposed at intervals between the spacers 44 in a planar region defined by the spacers 44 and the outer periphery of the bottom surface of the lower surface magnetic plate 40. The protruding magnetic poles 46 of this embodiment are radially arranged within a desired radial range from a predetermined position radially outward from the central position of the bottom surface of the lower surface magnetic plate 40 to the outer periphery.

[0053] Figure 6 This illustrates the state where the attraction force of the protruding magnetic pole 46 is set to attraction. When the protrusion 22B is directed towards... Figure 6 When the desorption position (dashed line) is rotated, the magnetic plate 40 on the lower surface of the flat plate 22A rotates around the center of the bottom surface, so that the planar position of the magnet 10 crosses the planar position of the separator 44, and the attraction force of the protruding magnetic pole 46 switches to desorption. Since the number of magnetic poles of the magnetic holding member 100 in this embodiment is greater than that of the magnetic holding member 100 in the second embodiment, it is more convenient to set the operating angle to be smaller than the attraction / desorption switching operating angle of the protruding magnetic pole 46 in the second embodiment.

[0054] (Fourth implementation)

[0055] Figure 7 This is a partial perspective bottom view of the magnetic retainer 100 according to the fourth embodiment. In this embodiment, the reference numerals used in the various embodiments are used for structures common to the first to third embodiments, and detailed descriptions are omitted here. Furthermore, for structures that are not shown in the bottom view, unless specifically mentioned, the magnetic retainer 100 of this embodiment has the same structure as the magnetic retainer 100 of the first to third embodiments.

[0056] The magnetic retainer 100 of this embodiment is similar to that of the third embodiment in that its top view shape is a regular octagon. It is also similar in that the magnetic retainer 100 of this embodiment has eight separators 44 extending radially from the center point to each vertex of the regular octagon on the bottom surface of the lower surface-side magnetic plate 40. The protruding magnetic pole 46 of this embodiment is characterized by being formed in a letter V shape in the planar region divided by the separators 44 and the outer periphery of the bottom surface of the lower surface-side magnetic plate 40. Specifically, the protruding magnetic pole 46 is formed by two straight sections 46A arranged radially to the outer periphery parallel to the separators 44 at a position adjacent to the separators 44, and a connecting section 46B connecting the inner ends of the two straight sections 46A to each other at their central ends. By forming the protruding magnetic pole 46 over a large area in this way, the adsorption range can be expanded, which is advantageous.

[0057] Figure 7 This illustrates the state where the attraction force of the protruding magnetic pole 46 is set to attraction. When the protrusion 22B is directed towards... Figure 7 When the desorption position (dashed line) is rotated, the magnetic plate 40 on the lower surface of the flat plate 22A rotates around the center of the bottom surface, so that the planar position of the magnet 10 crosses the planar position of the separator 44, and the attraction force of the magnetic pole 46 is switched to desorption. Since the number of magnetic poles of the magnetic holding member 100 in this embodiment is the same as that in the third embodiment, which is 8 poles, the operating angle can be set to the same as that in the third embodiment.

[0058] The magnetic retainer 100 of the present invention has been described above based on several embodiments, but the magnetic retainer 100 of the present invention is not limited to the above embodiments. For example, in the above embodiments, the top view shape of the magnetic retainer 100 is described as a regular square, a regular hexagon, or a regular octagon, but it is not limited to these shapes. The top view shape of the magnetic retainer 100 may also be a regular decagon, a regular dodecagon, or a regular N-gon (N is an even number of 4 or more). When the magnetic retainer 100 of the present invention is formed as a regular N-gon in top view, N (an even number of 4 or more) separators 44 are provided extending from the center of the plane toward each vertex, and N magnets 10 are evenly spaced around the center of the plane of the magnetic retainer 100 in the circumferential direction of the retainer 20.

[0059] In addition, such as Figure 8 A, Figure 8 B Figure 9 A and Figure 9 As shown in Figure B, the top view shape of the magnetic retainer 100 can also be circular. Additionally, Figure 8 A is a variation of the first embodiment. Figure 8B is a variation of the second embodiment. Figure 9 A is a variation of the third embodiment. Figure 9 B is a variation of the fourth embodiment. For example... Figure 8 A, Figure 8 B Figure 9 A and Figure 9 As shown in Figure B, when the top view of the magnetic retainer 100 is circular, the storage portion 22C can be arranged in a manner that divides the circumference of the flat plate portion 22A into N equal parts (N is an even number of 4 or more). For the magnetic retainer 100, if the number of protruding magnetic poles 46 (the number of storage portions 22C) is increased, the rotation angle of the protruding portion 22B required for switching between adsorption and desorption due to the magnetic force generated by the protruding magnetic poles 46 can be reduced. However, the adsorption force of the protruding magnetic poles 46 will decrease. Therefore, it is appropriate to set the adsorption force according to the required adsorption force.

[0060] Furthermore, in the above embodiments, a magnet 10 with a fan-shaped top view is used, but the top view shape of the magnet 10 is not limited to a fan-shaped top view. The magnet 10 can be housed within the area defined by the outer periphery of the lower surface magnetic plate 40 and the partition 44 formed on the bottom surface of the lower surface magnetic plate 40. The bottom surface of the lower surface magnetic plate 40 is the side opposite to the clamping surface of the retainer 20, and the top view shape is not particularly limited.

[0061] Furthermore, in the above embodiments, a positioning protrusion 24B is formed on the outer retainer 24, but the arrangement of the positioning protrusion 24B may be omitted. In this case, the planar shape of the flat plate receiving portion 24A may be formed to be equal to or slightly larger than the planar shape of the flat plate portion 22A. The key point is that it is sufficient to allow rotation in the horizontal plane while maintaining the position of the outer periphery of the flat plate portion 22A approximately.

[0062] Furthermore, in the above embodiments, the retainer 20, which holds the magnet 10 so that it can rotate about the center position of the plane of the magnetic retainer 100, has an inner retainer 22 and an outer retainer 24, but is not limited to this form. It is also possible to adopt a form where, on the opposing surface of at least one of the upper surface magnetic plate 30 and the lower surface magnetic plate 40 opposite to the inner retainer 22, a recess (not shown) corresponding to the flat plate receiving portion 24A is formed to house the inner retainer 22 in a rotatable state, and the inner retainer 22 is housed in this recess. Additionally, this recess also forms a portion corresponding to the positioning protrusion 24B that allows the outer periphery of the flat plate portion 22A of the inner retainer 22 to rotate in a positioned state, and a portion corresponding to the opening 24C that allows the protrusion 22B of the inner retainer 22 to protrude from the side and rotate in the horizontal plane.

[0063] The retainer 20 in the above embodiment has a flat plate portion 22A and a protrusion 22B that protrudes radially outward from the flat plate portion 22A. The attraction / desorption switching of the protruding magnetic pole 46 is achieved by rotating the protrusion 22B in a predetermined direction within the range of the opening portion 24C, but this configuration is not limited to this form. For example, a configuration such as... Figure 10 A and Figure 10 As shown in Figure B, a threaded hole 22D with the same diameter as the fixing threaded hole 34 is formed on the axis of the inner retainer 22. A rotating rod 50, with threads formed at its front end on the insertion side, is screwed into both the fixing threaded hole 34 and the threaded hole 22D, thereby threading the rotating rod 50 onto the inner retainer 22. This type of magnetic retainer 100 allows the rotating rod 50 to be rotated using a drive source such as a motor or manually, enabling the inner retainer 22 to rotate appropriately inside the outer retainer 24, similar to other embodiments.

[0064] In addition, in adopting Figure 10 A and Figure 10 In the case of the magnetic retainer 100 shown in B, the protrusion 22B of the inner retainer 22 and the opening 24C of the outer retainer 24 can be omitted. Furthermore, by adopting this form of the magnetic retainer 100, the planar dimensions of the magnetic retainer 100 can be further reduced in space compared to other embodiments. That is, it is more convenient to perform the adsorption / desorption switching of the protruding magnetic pole 46 in work environments where even the other embodiments described above are difficult to use.

[0065] Furthermore, in the embodiments described above, the form of the separator 44 formed by a groove having two bottoms has been described, but the form of the separator 44 is not limited to this form. The separator 44 may also be formed by a simple groove, or have a non-magnetic material embedded in the bottom surface of the magnetic plate 40 on the lower surface side.

[0066] Furthermore, in addition to the variations described above, other forms can also be adopted by appropriately combining the variations described in the embodiments.

Claims

1. A magnetic retaining element, characterized in that, The magnetic retainer has the following features: magnet; The retainer is made of a non-magnetic material and is configured to allow the magnets to be arranged at the required intervals in a circumferential arrangement. The first magnetic plate and the second magnetic plate clamp the retainer in the thickness direction in a state that allows the retainer to rotate in the horizontal plane; as well as An even number of four or more separators are formed on the opposite side of the second magnetic plate, opposite to the clamping surface of the retainer, and extend from the center of the opposite side toward the outer periphery of the opposite side. When facing the opposite side, the magnets are housed in the area defined by the outer periphery of the opposite side and the separator in the same manner with identical magnetic poles, and are arranged such that the magnetic poles of adjacent magnets in the rotation direction of the retainer are different from each other. The retainer rotates between a position in which the planar region of the magnet is divided in the rotational direction of the retainer by the separator, and a position in which the magnet is housed between the separators. The second magnetic plate is provided with protruding magnetic poles that serve as adsorption portions for adsorbed objects. The protruding magnetic poles protrude along the thickness direction from the opposite side of the second magnetic plate, which is opposite to the clamping surface of the retainer. The protruding magnetic poles are respectively arranged at the arrangement interval of the separator within a radially required range from the central portion of the opposite side towards the outer periphery.

2. The magnetic retaining element according to claim 1, characterized in that, The protruding magnetic pole is positioned at the outer periphery defined by the separator.

3. A magnetic retaining element, characterized in that, The magnetic retainer has the following features: magnet; The retainer is made of a non-magnetic material and is configured to allow the magnets to be arranged at the required intervals in a circumferential arrangement. The first magnetic plate and the second magnetic plate clamp the retainer in the thickness direction in a state that allows the retainer to rotate in the horizontal plane; as well as An even number of four or more separators are formed on the opposite side of the second magnetic plate, opposite to the clamping surface of the retainer, and extend from the center of the opposite side toward the outer periphery of the opposite side. When facing the opposite side, the magnets are housed in the area defined by the outer periphery of the opposite side and the separator in the same manner with identical magnetic poles, and are arranged such that the magnetic poles of adjacent magnets in the rotation direction of the retainer are different from each other. The retainer rotates between a position in which the planar region of the magnet is divided in the rotational direction of the retainer by the separator, and a position in which the magnet is housed between the separators. The second magnetic plate is provided with a protruding magnetic pole that serves as an adsorption portion for the adsorbed object. The protruding magnetic pole protrudes from the opposite side of the second magnetic plate, opposite to the clamping surface of the retainer, along the thickness direction. The protruding magnetic pole has two straight portions arranged parallel to the separator along the separator in the area divided by the separator and the outer periphery, and a connecting portion that connects the inner ends of the straight portions to each other at the central end of the opposite side.

4. A magnetic retaining element, characterized in that, The magnetic retainer has the following features: magnet; The retainer is made of a non-magnetic material and is configured to allow the magnets to be arranged at the required intervals in a circumferential arrangement. The first magnetic plate and the second magnetic plate clamp the retainer in the thickness direction in a state that allows the retainer to rotate in the horizontal plane; as well as An even number of four or more separators are formed on the opposite side of the second magnetic plate, opposite to the clamping surface of the retainer, and extend from the center of the opposite side toward the outer periphery of the opposite side. The second magnetic plate, divided by the separator, has protruding magnetic poles that serve as adsorption portions for adsorbed objects. These protruding magnetic poles protrude along the thickness direction from the opposite side of the second magnetic plate, opposite to the clamping surface of the retaining member. The retaining member, the first magnetic plate, and the second magnetic plate are all regular N-gons. The separator extends toward each vertex of the regular N-gon, where N is an even number of 4 or more. When facing the opposite side, the magnets are housed in the area divided by the outer periphery of the opposite side and the separator with the same magnetic poles, and are arranged such that the magnetic poles of adjacent magnets in the rotation direction of the retaining member are different from each other. The retainer rotates between a position in which the planar region of the magnet is divided by the separator in the rotational direction of the retainer, and a position in which the magnet is housed between the separators.

5. The magnetic retaining member according to claim 4, characterized in that, The magnet has a fan-shaped top view.

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