Suction base

Abstract

To provide a suction base that is easy to remove even when a strong magnet is used.SOLUTION: A suction base 11 includes a plate-shaped member 50 configured to support a supported object 1 on one side in the thickness direction, a pair of magnet portions 52 provided on the other side in the thickness direction of the plate-shaped member 50, and a pair of support portions 54 provided on the other side in the thickness direction of the plate-shaped member 50. In the first direction D1, the pair of magnet portions 52 are provided on one side of the center line Lb, and the pair of support portions 54 are provided on the other side of the center line Lb. The attraction surface 52a of the magnet portions 52 and the support surface 54a of the support portions 54 are each inclined with respect to the plate-shaped member 50 such that the distance from the plate-shaped member 50 in the thickness direction of the plate-shaped member 50 decreases toward the center line La in the second direction D2.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an attraction base that attracts an object by the magnetic force of a permanent magnet. [Background technology]

[0002] In recent years, the method of using magnetism to secure objects to steel walls has been utilized in various markets. A familiar example is a storage shelf that is secured to the wall of a kitchen or bathroom. Magnetic securing methods are also used when temporarily installing signs, exhibits, electronic devices, etc. on steel walls.

[0003] One possible method for fastening an object using magnetic force is the technology disclosed in Patent Document 1. In the mounting structure for an instrument disclosed in Patent Document 1, a magnet is embedded in the center of a support part that is attached to the mounting surface, and an adhesive part is formed on the back side of the support part (the side that is attached to the mounting surface) using an elastic body that can increase the surface coefficient of friction. Patent Document 1 describes that this configuration allows the instrument to be firmly attached to the mounting surface and also makes it easy to remove the instrument. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-187394 Summary of the Invention [Problem to be solved by the invention]

[0005] When using the mounting structure disclosed in Patent Document 1 to fix a heavy instrument to a mounting surface (wall), it is conceivable to embed a powerful magnet in the support part. However, in a configuration in which a magnet is provided in the center of the support part as in Patent Document 1, if a strong magnet is used, the magnetic force makes it impossible to easily remove the support part from the mounting surface.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an attraction base that is easy to remove even when a strong magnet is used. [Means for solving the problem]

[0007] In one aspect of the present invention, the suction base comprises: An adsorption base that can be attached to a curved surface having a cross section that is curved in an arc shape, a plate-like member configured to be able to hold an object on one side in a thickness direction; a pair of magnet portions provided on the other side of the plate-shaped member in the thickness direction; a pair of support portions provided on the other side of the plate-like member in the thickness direction, the pair of support parts are made of a magnetic material other than a permanent magnet or a non-magnetic material, In a first direction perpendicular to the thickness direction, the pair of magnet portions are provided on one side of a first center line of the plate-like member extending in a second direction perpendicular to the thickness direction and the first direction, and the pair of support portions are provided on the other side of the first center line, In the second direction, one of the magnet portions and one of the support portions is provided on one side of a second center line of the plate-like member extending in the first direction, and the other of the magnet portion and the other of the support portion is provided on the other side of the second center line, each of the pair of magnet portions has an attraction surface that faces the curved surface when the attraction base is attached to the curved surface; each of the pair of support portions has a support surface that faces the curved surface when the suction base is attached to the curved surface; The adsorption surface and the support surface are each inclined relative to the plate-like member so that the distance to the plate-like member in the thickness direction becomes closer or farther toward the first center line in the first direction, or are inclined relative to the plate-like member so that the distance to the plate-like member in the thickness direction becomes closer or farther toward the second center line in the second direction. [Effects of the Invention]

[0008] According to the present invention, an attraction base that is easy to remove even when a strong magnet is used can be obtained. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an example of use of an adsorption base according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the suction base. [Figure 3] FIG. 3 is a rear view of the suction base. [Figure 4] FIG. 4 is a plan view of the suction base. [Figure 5] FIG. 5 is a bottom view of the suction base. [Figure 6] FIG. 6 is an exploded perspective view of the suction base. [Figure 7] FIG. 7 is a side view showing an adsorption base according to a modified example. [Figure 8] FIG. 8 is a diagram showing an adsorption base according to a modified example. [Figure 9] FIG. 9 is a side view showing an adsorption base according to a modified example. [Figure 10] FIG. 10 is a schematic diagram showing an adsorption base according to a modified example. [Figure 11] FIG. 11 is a schematic diagram showing an adsorption base according to a modified example. [Figure 12] FIG. 12 is a schematic diagram showing an adsorption base according to a modified example. [Figure 13] FIG. 13 is a perspective view showing an example of use of the suction base according to the reference example. [Figure 14] FIG. 14 is a front view of the suction base according to the reference example. [Figure 15] FIG. 15 is a rear view of the suction base according to the reference example. [Figure 16] FIG. 16 is a plan view of an adsorption base according to a reference example. [Figure 17] FIG. 17 is a bottom view of the suction base according to the reference example. [Figure 18]FIG. 18 is a diagram for explaining a method for measuring the magnetic attraction force. [Figure 19] FIG. 19 is a rear view showing an adsorption base according to another reference example. [Figure 20] FIG. 20 is a rear view showing an adsorption base according to another reference example. [Figure 21] FIG. 21 is a schematic view showing an adsorption base according to another reference example. [Figure 22] FIG. 22 is a schematic view showing an adsorption base according to another reference example. [Figure 23] FIG. 23 is a schematic view showing an adsorption base according to another reference example. DETAILED DESCRIPTION OF THE INVENTION

[0010] An adsorption pedestal according to an embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view showing an example of use of an adsorption pedestal according to one embodiment of the present invention. Fig. 1 shows a first direction D1, a second direction D2, and a third direction D3 that are orthogonal to one another. The first direction D1, the second direction D2, and the third direction D3 will also be shown as appropriate in each of the figures described below. In this embodiment, the first direction D1 corresponds to the up-down direction when the adsorption pedestal 11 is used.

[0011] As shown in Fig. 1, the suction base 11 according to this embodiment can be used to attach a supported object 1 to an iron pole 2. Although only a portion of the iron pole 2 is shown in Fig. 1, the iron pole 2 has a cylindrical shape and a surface 2a that is curved in an arc shape in a cross section perpendicular to the first direction D1. The supported object 1 may be, for example, an electronic device such as a communication device or a photographing device, or a notice such as a signboard or a guide board.

[0012] In this embodiment, the support object 1 is supported by the attraction base 11 by fixing the support object 1 to a plate-like member 50 of the attraction base 11, which will be described later. In this embodiment, the attraction base 11, which supports the support object 1, can be attracted to the surface 2a of the iron pole 2 by the magnetic force of a pair of magnet parts 52 (see FIG. 3), which will be described later. In this way, the support object 1 is attached to the iron pole 2 via the attraction base 11. The configuration of the attraction base 11 will be described in detail below.

[0013] Figure 2 is a front view of the suction base 11, Figure 3 is a rear view of the suction base 11, Figure 4 is a plan view of the suction base 11, Figure 5 is a bottom view of the suction base 11, and Figure 6 is an exploded oblique view of the suction base 11.

[0014] 2 to 6, the adsorption base 11 includes a plate-shaped member 50, a pair of magnet portions 52, a pair of support portions 54, a pair of grip portions 56, a pair of sheets 58, a pair of sheets 60, and a cover plate 62. As shown in FIG. 6, each magnet portion 52 includes a plurality of magnets 64 and a yoke 66.

[0015] In this embodiment, the third direction D3 coincides with the thickness direction of the plate-shaped member 50. FIGS. 2 and 3 show an imaginary straight line La that passes through the center of the plate-shaped member 50 in the first direction D1 and extends in the second direction D2, and an imaginary straight line Lb that passes through the center of the plate-shaped member 50 in the second direction D2 and extends in the first direction D1. Hereinafter, the straight lines La and Lb will be referred to as the center lines La and Lb of the plate-shaped member 50, respectively. In this embodiment, the center line La corresponds to the first center line, and the center line Lb corresponds to the second center line. In FIGS. 4 and 5, the position of the surface 2a of the iron pillar 2 when the suction base 11 is fixed to the iron pillar 2 is indicated by a dashed dotted line.

[0016] 1, the plate-shaped member 50 is configured to be able to support the supported object 1 on one side (surface 50a side) in the thickness direction (third direction D3). Note that, hereinafter, the surface 50a on one side in the thickness direction of the plate-shaped member 50 will be referred to as the front surface 50a, and the surface 50b on the other side in the thickness direction of the plate-shaped member 50 will be referred to as the back surface 50b.

[0017] 2, 3, and 6, in this embodiment, a plurality of (six in this embodiment) through holes 50c are formed in the center of the plate-shaped member 50 in the second direction D2. In this embodiment, for example, a fastening member (such as a bolt) (not shown) can be inserted into the through hole 50c from the back surface 50b side and fastened to the support object 1 (see FIG. 1) provided on the front surface 50a side of the plate-shaped member 50, thereby attaching the support object 1 to the plate-shaped member 50. That is, in this embodiment, the plurality of through holes 50c function as attachment portions for attaching the support object 1 to the plate-shaped member 50.

[0018] 4 to 6, in this embodiment, in order to improve the rigidity of the plate-shaped member 50, both edge portions of the plate-shaped member 50 in the second direction D2 are bent into an L-shape when viewed from the first direction D1. The plate-shaped member 50 is made of, for example, stainless steel. In this case, the weather resistance and water resistance of the suction base 11 can be improved.

[0019] As shown in FIGS. 3 to 6, the pair of magnet portions 52 and the pair of support portions 54 are provided on the other side in the thickness direction of the plate-shaped member 50 (the rear surface 50b side). In this embodiment, each magnet portion 52 includes twelve magnets 64. As shown in FIG. 3, in the first direction D1, the pair of magnet portions 52 are provided on one side (upper side) of the center line La of the plate-shaped member 50, and the pair of support portions 54 are provided on the other side (lower side) of the center line La of the plate-shaped member 50. Each support portion 54 is made of a magnetic material or a non-magnetic material excluding a permanent magnet. The support portion 54 is made of, for example, aluminum or stainless steel.

[0020] Each of the multiple magnets 64 has a magnetic pole face on one side and the other side in the third direction D3 (thickness direction of the plate-like member 50). As shown in Fig. 3, in this embodiment, the multiple magnets 64 are arranged so that the magnetic pole faces of adjacent magnets 64 have opposite polarities. In this embodiment, in each magnet section 52, the magnetic pole faces of the multiple magnets 64 form an attraction surface 52a that is attracted to the surface 2a of the iron pillar 2 when the attraction base 11 is attached to the iron pillar 2.

[0021] 3, in this embodiment, the pair of magnet portions 52 are arranged on one side and the other side of the center line Lb in the second direction D2 so as to be line-symmetrical about the center line Lb. Similarly, the pair of support portions 54 are arranged on one side and the other side of the center line Lb in the second direction D2 so as to be line-symmetrical about the center line Lb.

[0022] Note that the statement that a pair of magnet sections 52 are arranged so as to be line-symmetrical about the center line Lb refers to the symmetry regarding the positions of the magnet sections, but does not require symmetry in the arrangement of the magnetic poles of the multiple magnets. Therefore, as shown in Figure 3, the arrangement of the magnetic poles of the multiple magnets 64 of one magnet section 52 and the arrangement of the magnetic poles of the multiple magnets 64 of the other magnet section 52 do not have to be line-symmetrical about the center line Lb.

[0023] For example, magnets having the same (same design) dimensions and performance (attractive force) are used as the multiple magnets 64 of the magnet unit 52. For example, rare earth magnets are used as the magnets 64. Specifically, for example, neodymium magnets are used as the magnets 64.

[0024] 4 and 6, each magnet section 52 is provided with a yoke 66 to support the multiple magnets 64. The yoke 66 is made of a magnetic material such as iron. The yoke 66 is fixed to the plate-like member 50 by fastening members such as bolts.

[0025] In this embodiment, all of the magnets 64 constituting the pair of magnet sections 52 are provided on one side of the center line La in the first direction D1. More specifically, the entire pair of magnet sections 52 are provided on one side of the center line La in the first direction D1 (upper side in this embodiment). That is, in this embodiment, all of the magnets 64 and yokes 66 constituting the pair of magnet sections 52 are provided on one side of the center line La in the first direction D1. Also, in this embodiment, the entire pair of support sections 54 are provided on the other side of the center line La in the first direction D1 (lower side in this embodiment).

[0026] Each yoke 66 has a fixing surface 66a to which the multiple magnets 64 of the magnet section 52 are fixed. The dimension of the yoke 66 in the third direction D3 decreases toward the center line Lb (see FIG. 3) in the second direction D2. As a result, as shown in FIG. 4, the fixing surface 66a is inclined relative to the plate-shaped member 50 so that the distance between the fixing surface 66a and the plate-shaped member 50 in the third direction D3 decreases toward the center line Lb in the second direction D2. Therefore, when a rectangular column-shaped magnet 64 is used, the magnetic pole surface of each magnet 64 can be inclined relative to the plate-shaped member 50, similar to the fixing surface 66a of the yoke 66. In this case, when attaching the attachment base 11 to the iron pillar 2, even if the surface 2a of the iron pillar 2 is curved in an arc shape, the gap between the surface 2a and the magnet 64 can be prevented from becoming large. As a result, the pair of magnet sections 52 can be attached to the iron pillar 2 with sufficient force.

[0027] As shown in FIG. 5, each support portion 54 has a support surface 54a facing away from the plate-shaped member 50 in the third direction D3. Like the fixing surface 66a of the yoke 66, the support surface 54a is inclined with respect to the plate-shaped member 50 so that the distance between the support surface 54a and the plate-shaped member 50 in the third direction D3 decreases toward the center line Lb (see FIG. 3) in the second direction D2. In this case, when the suction base 11 is attached to the iron pillar 2, even if the surface 2a of the iron pillar 2 is curved in an arc shape, it is possible to prevent the gap between the surface 2a and the support portion 54 from becoming large. As a result, the pair of support portions 54 can be brought into appropriate contact with the iron pillar 2.

[0028] As shown in Figures 3, 4 and 6, a pair of sheets 58 are provided to cover the pair of magnet portions 52. As shown in Figures 4 and 6, in this embodiment, the sheet 58 is provided to cover the plurality of magnets 64 and the yoke 66. Furthermore, as shown in Figures 5 and 6, a pair of sheets 60 are provided to cover the pair of support portions 54. In this embodiment, the sheets 58 and 60 are made of silicone rubber.

[0029] As shown in FIGS. 3 to 6 , the outer periphery of each sheet 58 and the outer periphery of each sheet 60 are sandwiched between the plate-shaped member 50 and the cover plate 62 and fixed to the plate-shaped member 50 and the cover plate 62. As shown in FIGS. 3 and 6 , in this embodiment, the cover plate 62 has a pair of rectangular through holes 62a formed above the center line La and a pair of rectangular through holes 62b formed below the center line La. Furthermore, a plurality of circular through holes 62c are formed in the center of the cover plate 62 in the second direction D2. In this embodiment, the magnet portion 52 and portions of the sheet 58 that cover the magnet portion 52 are fitted into the through holes 62a, and the support portion 54 and portions of the sheet 60 that cover the support portion 54 are fitted into the through holes 62b. The outer peripheries of the sheets 58, 60 are fixed to the plate-shaped member 50 and the cover plate 62 by a plurality of bolts 68 (see FIG. 3 ). The plurality of through holes 62c are formed at positions facing the plurality of through holes 50c of the plate-like member 50. The plurality of through holes 62c are holes for passing fastening members such as bolts that are used when attaching the supported object 1 (see FIG. 1) to the plate-like member 50.

[0030] As shown in Figures 1, 2 and 6, in this embodiment, the gripping portions 56 are handles. The pair of gripping portions 56 are detachably attached to the plate-shaped member 50. In this embodiment, each gripping portion 56 can be attached to the plate-shaped member 50 by fitting and hooking both ends of the gripping portion 56 into through-holes 50d formed in the plate-shaped member 50. At least a portion of each gripping portion 56 is provided on the other side (lower side) of the center of the plate-shaped member 50 in the first direction D1. In this embodiment, the entirety of each gripping portion 56 is provided on the other side (lower side) of the center of the plate-shaped member 50 in the first direction D1. In this embodiment, the gripping portions 56 correspond to pulling portions.

[0031] In this embodiment, the gripping portion 56 is formed of, for example, aluminum. It is preferable to apply an alumite treatment to the surface of the gripping portion 56. In this case, it is possible to suppress electrolytic corrosion between the gripping portion 56 and the plate-like member 50.

[0032] (Action and effect) In this embodiment, the attraction base 11 can be attracted to the surface 2a of the iron pole 2 by the magnetic force of the pair of magnet portions 52. Here, in this embodiment, the pair of support portions 54 are made of a magnetic material or a non-magnetic material other than a permanent magnet. Therefore, when the attraction base 11 is attracted to the surface 2a of the iron pole 2, the pair of support portions 54 can be prevented from being attracted to the surface 2a of the iron pole 2 with a large force. Furthermore, in this embodiment, in the first direction D1, the pair of magnet portions 52 are provided on one side (upper side) of the center line La of the plate-shaped member 50, and the pair of support portions 54 are provided on the other side (lower side) of the center line La of the plate-shaped member 50. With this configuration, when removing the attraction base 11 from the iron pole 2 (object to be attracted), the worker can easily separate the pair of support portions 54 from the iron pole 2 by pulling the lower portion of the plate-shaped member 50 in a direction away from the iron pole 2. Furthermore, after the pair of support parts 54 are separated from the iron pillar 2, the pair of magnet parts 52 can be easily separated from the iron pillar 2 by the principle of leverage. Therefore, in this embodiment, even if the attractive force of the pair of magnet parts 52 is made sufficiently large, the attractive base 11 can be easily removed from the iron pillar 2 without using a special operating jig. In other words, even if a strong magnet is used as the magnet for attracting the attractive base 11 to the iron pillar 2, the attractive base 11 can be easily removed from the iron pillar 2.

[0033] In this embodiment, at least a part of the gripping portion 56 is provided on the other side (lower side) of the center of the plate-shaped member 50 in the first direction D1. This allows the worker to hold the gripping portion 56 and easily pull the lower part of the plate-shaped member 50 in a direction away from the iron pillar 2. As a result, it becomes even easier to remove the suction base 11 from the iron pillar 2.

[0034] When attaching the attraction base 11 to the iron pole 2, for example, the pair of magnet portions 52 are brought into contact with the iron pole 2 before the pair of support portions 54. Thereafter, the lower side of the attraction base 11 is moved toward the iron pole 2 using the pair of magnet portions 52 as a fulcrum, and the pair of support portions 54 are brought into contact with the iron pole 2. Therefore, no special operating tool is required when attaching the attraction base 11 to the iron pole 2. In this way, the attraction base 11 according to this embodiment has a simple configuration and can be easily attached to and detached from the object to be attracted (in this embodiment, the iron pole 2).

[0035] Furthermore, in this embodiment, one of the pair of magnet portions 52 is disposed on one side of the center line Lb in the second direction D2, and the other magnet portion 52 is disposed on the other side of the center line Lb in the second direction D2. Similarly, one of the pair of support portions 54 is disposed on one side of the center line Lb in the second direction D2, and the other support portion 54 is disposed on the other side of the center line Lb in the second direction D2. This configuration allows the plate-shaped member 50 to be stably fixed to the iron pole 2. In particular, in this embodiment, the pair of magnet portions 52 and the pair of support portions 54 are each arranged symmetrically with respect to the center line Lb. This allows the plate-shaped member 50 to be more stably fixed to the iron pole 2.

[0036] Furthermore, in this embodiment, the attraction surface 52a of each magnet portion 52 and the support surface 54a of each support portion 54 are inclined relative to the plate-shaped member 50 so that the distance to the plate-shaped member 50 in the thickness direction of the plate-shaped member 50 decreases toward the center line Lb in the second direction D2. In this case, when the attraction base 11 is attracted to the iron pole 2, even if the surface 2a of the iron pole 2 is curved in an arc, it is possible to prevent the gap between the surface 2a and the magnet portion 52 and the gap between the surface 2a and the support portion 54 from becoming large. As a result, the attraction base 11 can be properly fixed to the iron pole 2.

[0037] In this embodiment, the magnets 64 are arranged in each magnet section 52 so that the magnetic pole faces of adjacent magnets 64 have opposite polarities. In this case, magnetic flux can be efficiently passed between adjacent magnets 64, so that sufficient attraction force can be exerted even if a magnetic gap such as paint or rubber exists between the object to be attracted (iron pole 2) and the magnet section 52.

[0038] In this embodiment, the magnet portion 52 and the support portion 54 are covered with sheets 58 and 60 made of silicone rubber. This improves the weather resistance and water resistance of the attraction base 11 (magnet portion 52 and support portion 54). Furthermore, in this embodiment, the frictional force generated between the iron pillar 2 and the silicone rubber (sheets 58, 60) is utilized to improve the vertical load capacity.

[0039] In this embodiment, a cover plate 62 is provided on the rear surface 50b side of the plate-like member 50. This makes it possible to improve the rigidity of the entire suction base 11.

[0040] (Variation) In the above-described embodiment, the adsorption base 11 is easily attached to a cylindrical iron pillar 2 extending in the vertical direction. The adsorption surfaces 52a of the magnet portions 52 and the support surfaces 54a of the support portions 54 are inclined relative to the plate-shaped member 50 so that the distance from the plate-shaped member 50 in the thickness direction of the plate-shaped member 50 decreases toward the center line Lb in the second direction D2. However, the inclination direction of the adsorption surfaces 52a and the support surfaces 54a is not limited to the above-described example. FIG. 7 is a schematic side view showing another example of the adsorption base 11. As shown in FIG. 7, in the adsorption base 11 according to this embodiment, the adsorption surfaces 52a of the magnet portions 52 and the support surfaces 54a of the support portions 54 are inclined relative to the plate-shaped member 50 so that the distance from the plate-shaped member 50 in the thickness direction of the plate-shaped member 50 decreases toward the center line La (see FIG. 3) in the first direction D1. In this case, the adsorption base 11 can be attached to a cylindrical iron pillar 2 extending in the horizontal direction.

[0041] 7, the dimension of the yoke 66 in the third direction D3 decreases toward the center line La (see FIG. 3) in the first direction D1. As a result, the fixing surface 66a of the yoke 66 is inclined with respect to the plate-shaped member 50 so that the distance between the fixing surface 66a and the plate-shaped member 50 in the third direction D3 decreases toward the center line La in the first direction D1. Therefore, when using rectangular column-shaped magnets 64, the magnetic pole faces of the magnets 64 can be inclined with respect to the plate-shaped member 50, similar to the fixing surface 66a of the yoke 66.

[0042] In the above embodiment, the case where the suction base 11 is attached to the iron pole 2 has been described, but the object to which the suction base is attached is not limited to an iron (steel) member having a convexly curved surface in cross section, and the suction base may be attached to an iron (steel) member having a concavely curved surface in cross section. For example, as shown in Figures 8 and 9, the suction base 11 may be configured so as to be attachable to an iron member 3 having a concavely curved surface 3a in cross section. A brief description will be given below.

[0043] FIG. 8 is a diagram illustrating an adsorption pedestal according to a modified example. In FIG. 8, (a) is a plan view of the adsorption pedestal according to the modified example, and (b) is a bottom view of the adsorption pedestal according to the modified example. The adsorption pedestal 11 illustrated in FIG. 8 differs from the adsorption pedestal 11 illustrated in FIGS. 4 and 5 in that the adsorption surfaces 52a of the magnet portions 52 and the support surfaces 54a of the support portions 54 are inclined relative to the plate-shaped member 50 so that the distance from the plate-shaped member 50 in the thickness direction of the plate-shaped member 50 increases toward the center line Lb (see FIG. 3) in the second direction D2. In this embodiment, the fixing surface 66a of the yoke 66 is inclined relative to the plate-shaped member 50 so that the distance from the plate-shaped member 50 in the third direction D3 increases toward the center line Lb in the second direction D2. According to the suction base 11 of this embodiment, when the suction base 11 is attached to an iron member 3 having a curved surface 3a that extends in the vertical direction and is concavely curved, it is possible to prevent the gap between the suction surface 52a of each magnet portion 52 and the curved surface 3a and the gap between the support surface 54a of each support portion 54 and the curved surface 3a from becoming large. This allows the suction base 11 to be attached appropriately to the iron member 3.

[0044] FIG. 9 is a side view showing an adsorption base according to a modified example. The adsorption base 11 shown in FIG. 9 differs from the adsorption base 11 shown in FIG. 7 in that the adsorption surfaces 52a of the magnet portions 52 and the support surfaces 54a of the support portions 54 are inclined relative to the plate-shaped member 50 so that the distance from the plate-shaped member 50 in the thickness direction of the plate-shaped member 50 increases toward the center line La (see FIG. 3) in the first direction D1. Note that in this embodiment, the fixing surface 66a of the yoke 66 is inclined relative to the plate-shaped member 50 so that the distance from the plate-shaped member 50 in the third direction D3 increases toward the center line La in the first direction D1. With the adsorption base 11 according to this embodiment, when the adsorption base 11 is attached to an iron member 3 having a curved surface 3a that extends horizontally and is concavely curved, it is possible to prevent the gaps between the adsorption surfaces 52a of the magnet portions 52 and the curved surface 3a and the gaps between the support surfaces 54a of the support portions 54 and the curved surface 3a from becoming large. This allows the suction base 11 to be attached to the iron member 3 appropriately.

[0045] In the above embodiment, the case where the yoke 66 is fixed to the plate-shaped member 50 and the multiple magnets 64 are fixed to the yoke 66 has been described, but the multiple magnets 64 may be fixed to the plate-shaped member 50 and the yoke 66 may be fixed to the multiple magnets 64 so that the positional relationship between the yoke 66 and the multiple magnets 64 in the third direction D3 is reversed. In this case, one surface of the yoke 66 in the thickness direction can be used as the attraction surface 52a of the magnet portion 52.

[0046] In the above-described embodiment, the fixing surface 66a of the yoke 66 (see FIG. 4 or FIG. 7) is inclined with respect to the plate-shaped member 50. However, the thickness of the yoke 66 may be uniform. Furthermore, the plurality of magnets 64 may be fixed directly to the plate-shaped member 50 without providing the yoke 66. In these cases, one magnetic pole face (the magnetic pole face on the iron pillar 2 side) of each magnet 64 may be inclined with respect to the other magnetic pole face, thereby inclining the attraction surface 52a of the magnet portion 52 with respect to the plate-shaped member 50. For example, in the attraction base 11 shown in FIG. 4, the yoke 66 may not be provided, and the dimensions of the plurality of magnets 64 in the third direction D3 may be reduced toward the center line Lb in the second direction D2. In the attraction base 11 shown in FIG. 7, the yoke 66 may not be provided, and the dimensions of the plurality of magnets 64 in the third direction D3 may be reduced toward the center line La in the first direction D1.

[0047] In the above embodiment, the magnet section 52 includes multiple magnets 64, but the magnet section 52 may include only one magnet. In the above embodiment, the magnet section 52 and the support section 54 are covered by the sheets 58, 60, but the sheets 58, 60 do not have to be provided. In addition, the cover plate 62 does not have to be provided.

[0048] In the above embodiment, the case has been described where the inclination of the attraction surface 52a of the magnet portion 52 and the support surface 54a of the support portion 54 relative to the plate-shaped member 50 is fixed, but the attraction base 11 may be configured so that the inclination of the attraction surface 52a and the support surface 54a relative to the plate-shaped member 50 can be changed. Below, a brief description will be given of the configuration for changing the inclination of the attraction surface 52a and the support surface 54a.

[0049] 10 to 12 are schematic diagrams showing an adsorption base according to a modified example. For example, as shown in FIG. 10, each magnet portion 52 may be supported by a plate-shaped member 50 so as to be able to swing around an oscillation shaft 34 extending in the first direction D1. Although not shown, each support portion 54 may also be supported by the plate-shaped member 50 so as to be able to swing around an oscillation shaft 34 extending in the first direction D1. In this case, for example, both edges of the plate-shaped member 50 in the first direction D1 may be bent, and the oscillation shaft 34 may be supported at the bent portions. Furthermore, the magnet portion 52 and the support portion 54 may be attached to the oscillation shaft 34 so as to be able to swing around the oscillation shaft 34. For example, a through hole penetrating the yoke 66 and the support portion 54 in the first direction D1 may be formed, and the oscillation shaft 34 may be passed through the through hole. Although not shown, each magnet portion 52 may be supported by the plate-shaped member 50 so as to be able to swing around a swing axis extending in the second direction D2. Similarly, although not shown, each support portion 54 may be supported by the plate-shaped member 50 so as to be able to swing around a swing axis extending in the second direction D2.

[0050] 11, each magnet portion 52 may be swingably supported on the plate-shaped member 50 via a plurality of elastic members 36. In this case, the plurality of elastic members 36 deform, thereby changing the inclination of the attraction surface 52a of each magnet portion 52 relative to the plate-shaped member 50 in accordance with the shape of the surface of the object to be attracted (e.g., iron pillar 2). Although not shown in the drawings, each support portion 54 may be swingably supported on the plate-shaped member 50 via a plurality of elastic members.

[0051] 12, for example, plate-shaped members 13a and 13b may be provided on both sides of the plate-shaped member 50 in the second direction D2. In this embodiment, the plate-shaped members 13a and 13b are coupled to the plate-shaped member 50 so as to be swingable around swing axes 15a and 15b extending in the first direction D1 as swing centers. In this embodiment, the supported object 1 is fixed to the plate-shaped member 50 so as to be positioned on one side in the thickness direction of the plate-shaped member 50, and a magnet portion 52 is fixed to each of the plate-shaped members 13a and 13b so as to be positioned on the other side in the thickness direction of the plate-shaped member 50. Although not shown in the drawings, a support portion 54 is fixed to each of the plate-shaped members 13a and 13b so as to be positioned on the other side in the thickness direction of the plate-shaped member 50. In this embodiment, the plate-shaped members 13a and 13b swing relative to the plate-shaped member 50, thereby making it possible to change the inclination of the attraction surfaces 52a of the magnet portions 52 relative to the plate-shaped member 50 in accordance with the shape of the surface of the object to be attracted (for example, the iron pillar 2). Note that the plate-shaped members 13a and 13b may be provided swingably on both sides of the plate-shaped member 50 in the first direction D1, with the pair of magnet portions 52 provided on the plate-shaped member 13a and the pair of support portions 54 provided on the plate-shaped member 13b.

[0052] In the above embodiment, the magnet portions 52 are provided on both sides of the center line Lb in the second direction D2, but other magnet portions may be provided on the center line Lb. Similarly, other support portions may be provided on the center line Lb.

[0053] In the above-described embodiment, a case has been described in which gripping portions 56 (handles in this embodiment) are provided as pulling portions, but the pulling portions may be configured so that an operator can pull the plate-shaped member 50 to one side in the third direction D3 (a direction away from the iron pole 2). More specifically, for example, the pulling portions may be configured so that an operator can hook their fingers, and may be holes (holes through which fingers can be hooked) formed in the plate-shaped member 50. Furthermore, in the above-described embodiment, a case has been described in which a pair of gripping portions 56 are provided on the plate-shaped member 50, but the number of pulling portions (grip portions) may be one, or three or more.

[0054] In the above embodiment, the case where the supported object 1 is fixed to the plate-shaped member 50 has been described, but the supported object 1 does not have to be fixed directly to the plate-shaped member 50. For example, the supported object 1 may be fixed to a member (hereinafter referred to as a fixing member) separate from the plate-shaped member 50, and the plate-shaped member 50 may support the fixing member in a swingable manner. In this case, the position of the supported object 1 relative to the plate-shaped member 50 can be adjusted by making it possible to fix the position of the fixing member relative to the plate-shaped member 50 at a desired position.

[0055] The object to which the attraction base 11 is attracted is not limited to the iron pole 2, and the attraction base 11 may be attracted to a wall or the like made of a magnetic material such as steel.

[0056] (Reference example) Hereinafter, an adsorption base according to a reference example will be described with reference to the drawings. Fig. 13 is a perspective view showing an example of use of the adsorption base according to the reference example. In this reference example, the first direction D1 also corresponds to the up-down direction when the adsorption base 10 is used.

[0057] As shown in FIG. 13 , like the above-described attraction base 11, the attraction base 10 according to this reference example can also be used to attach the support object 1 to the iron pole 2. In this reference example, the support object 1 is supported by the attraction base 10 by fixing the support object 1 to a plate-like member 12 of the attraction base 10, which will be described later. In this reference example, the attraction base 10 that supports the support object 1 can be attracted to the surface 2a of the iron pole 2 by the magnetic forces of a pair of magnet groups 14 (see FIG. 15 ) and a pair of magnets 16 (see FIG. 15 ), which will be described later. In this way, the support object 1 is attached to the iron pole 2 via the attraction base 10. The configuration of the attraction base 10 will be described in detail below.

[0058] FIG. 14 is a front view of the adsorption base 10, FIG. 15 is a rear view of the adsorption base 10, FIG. 16 is a plan view of the adsorption base 10, and FIG. 17 is a bottom view of the adsorption base 10. As shown in FIGS. 14 to 17, the adsorption base 10 includes a plate-shaped member 12, a pair of magnet groups 14, a pair of magnets 16, and a pair of gripping portions 18. In this reference example, the third direction D3 coincides with the thickness direction of the plate-shaped member 12. FIGS. 14 and 15 show an imaginary straight line L1 that passes through the center of the plate-shaped member 12 in the second direction D2 and extends in the first direction D1, and an imaginary straight line L2 that passes through the center of the plate-shaped member 12 in the first direction D1 and extends in the second direction D2. Hereinafter, the straight lines L1 and L2 will be referred to as the center lines L1 and L2 of the plate-shaped member 12, respectively. 16 and 17, the position of the surface 2a of the iron pole 2 when the suction base 10 is fixed to the iron pole 2 is indicated by a dashed line.

[0059] As shown in FIG. 13, the plate-shaped member 12 is configured to support a support object 1 on one side (the surface 12a side) in the thickness direction (third direction D3). In this reference example, as shown in FIGS. 14 and 15, a plurality of (six in this reference example) through holes 12c are formed in the center of the plate-shaped member 12 in the second direction D2. In this reference example, for example, a fastening member (such as a bolt) (not shown) can be inserted into the through hole 12c and fastened to the support object 1 (see FIG. 13) provided on the surface 12a side of the plate-shaped member 12, thereby attaching the support object 1 to the plate-shaped member 12. That is, in this reference example, the plurality of through holes 12c function as attachment portions for attaching the support object 1 to the plate-shaped member 12.

[0060] 16 and 17, in this reference example, in order to improve the rigidity of the plate-shaped member 12, both edges of the plate-shaped member 12 in the second direction D2 are bent into an L-shape when viewed from the first direction D1. The plate-shaped member 12 is made of, for example, stainless steel. In this case, the weather resistance and water resistance of the suction base 10 can be improved.

[0061] 14 to 17, the pair of magnet groups 14 and the pair of magnets 16 are provided on the other side (surface 12b side) in the thickness direction (third direction D3) of the plate-shaped member 12. In the first direction D1, the pair of magnet groups 14 are provided on one side (above) of the center of the plate-shaped member 12, and the pair of magnets 16 are provided on the other side (below) of the center of the plate-shaped member 12. Each magnet group 14 includes a plurality of magnets 40 (10 in this reference example).

[0062] Each of the magnets 40 in each magnet group 14 has a magnetic pole face on one side and the other side in the third direction D3 (thickness direction of the plate-like member 12). The same is true for each magnet 16. As shown in Fig. 15, in this reference example, the magnets 40 in each magnet group 14 are arranged so that the magnetic pole faces of adjacent magnets 40 have opposite polarities.

[0063] In this reference example, the pair of magnet groups 14 are arranged on one side and the other side of the center line L1 in the second direction D2 so as to be line-symmetrical about the center line L1. Similarly, the pair of magnets 16 are arranged on one side and the other side of the center line L1 in the second direction D2 so as to be line-symmetrical about the center line L1.

[0064] Note that the statement that a pair of magnet groups 14 are arranged so as to be line-symmetrical about the center line L1 defines symmetry with respect to the positions of the multiple magnets, but does not require symmetry in the arrangement of the magnetic poles of the multiple magnets. Therefore, as shown in Figure 15, the arrangement of the magnetic poles of the multiple magnets 40 in one magnet group 14 and the arrangement of the magnetic poles of the multiple magnets 40 in the other magnet group 14 do not have to be line-symmetrical about the center line L1. The same applies to the pair of magnets 16.

[0065] In this reference example, a pair of magnet groups 14 constitutes the first magnet section 4, and a pair of magnets 16 constitutes the second magnet section 6. In this reference example, the first magnet section is defined as all magnets arranged on one side of the center of the plate-shaped member in the first direction (the upper side in this reference example) and on the other side in the thickness direction of the plate-shaped member (the opposite side from the supported object). The second magnet section is defined as all magnets arranged on the other side of the center of the plate-shaped member in the first direction (the lower side in this reference example) and on the other side in the thickness direction of the plate-shaped member (the opposite side from the supported object). When a magnet is arranged on the center line of the plate-shaped member in the first direction (center line L2 in this reference example) when viewed from the thickness direction of the plate-shaped member, the magnet is not included in either the first magnet section or the second magnet section. In this reference example, the attractive force of the first magnet section 4 is greater than the attractive force of the second magnet section 6. The attractive force of the first magnet section 4 means the total attractive force of all the magnets 40 that make up the first magnet section 4, and the attractive force of the second magnet section 6 means the total attractive force of all the magnets 16 that make up the second magnet section 6. Figure 18 is a diagram for explaining a method for measuring the attractive force of a magnet.

[0066] As shown in FIG. 18, when measuring the attractive force of a magnet 40 (magnet 16), the magnet 40 (magnet 16) is fixed on a table 100 made of a non-magnetic material (e.g., brass) using a pair of fixtures 102 made of a non-magnetic material (e.g., brass). In this state, an attractive plate 104 made of a magnetic material (e.g., SPCC) is attached to the magnetic pole face of the magnet 40 (magnet 16) (the magnetic pole face that faces the object to be attracted when the attractive base 10 is in use). The attractive plate 104 is connected to a force gauge 200 by a wire 106. The force gauge 200 is set to peak hold mode, and the force gauge 200 is raised by an automatic elevator (not shown). The load when the attractive plate 104 separates from the magnet 40 (magnet 16) is measured as the attractive force of the magnet 40 (magnet 16). To minimize measurement variability, five measurements are taken for each magnet 40 (magnet 16), and the average value is used as the attractive force of the magnet 40 (magnet 16). In this way, the attractive forces of the multiple magnets 40 (magnets 16) are measured and added together to calculate the attractive force of the first magnet portion 4 (second magnet portion 6).

[0067] The adhesive force of the first magnet portion 4 is preferably set to at least twice the adhesive force of the second magnet portion 6, more preferably at least four times, and even more preferably at least six times, eight times, or even ten times.

[0068] In this reference example, for example, magnets having the same (same design) dimensions and performance (adsorption force) are used as the magnets 16 and 40. For example, neodymium magnets are used as the magnets 16 and 40.

[0069] 16, a pair of yokes 20 that support the pair of magnet groups 14 are provided between the pair of magnet groups 14 and the plate-shaped member 12. The yokes 20 are made of a magnetic material such as iron. The pair of yokes 20 are fixed to the plate-shaped member 12 by fastening members such as bolts.

[0070] Each yoke 20 has a fixing surface 20a to which the magnets 40 of the magnet group 14 are fixed. The fixing surface 20a is inclined with respect to the plate-shaped member 12 so that the closer it is to the center line L1 (see FIG. 15 ) in the second direction D2, the closer it is to the plate-shaped member 12 in the third direction D3. Therefore, when a rectangular column-shaped magnet 40 is used, the magnetic pole face of each magnet 40 can be inclined with respect to the plate-shaped member 12, similar to the fixing surface 20a of the yoke 20. In this case, when attaching the attachment base 10 to the iron pillar 2, even if the surface 2a of the iron pillar 2 is curved in an arc shape, it is possible to prevent the gap between the surface 2a and the magnet 40 from becoming large. As a result, the first magnet portion 4 can be attached to the iron pillar 2 with sufficient force.

[0071] 17, a pair of yokes 22 supporting the pair of magnets 16 are similarly provided between the pair of magnets 16 and the plate-shaped member 12. The yokes 22 are made of a magnetic material such as iron. The pair of yokes 22 are fixed to the plate-shaped member 12 by fastening members such as bolts. The magnets 16 are fixed to the yokes 22. Note that the positions of the magnets 16 and the yokes 22 in the third direction D3 may be reversed.

[0072] As shown in FIGS. 15 and 16 , a pair of sheets 24 made of silicone rubber are provided to cover the pair of magnet groups 14. In this reference example, the sheets 24 are provided to cover the magnet groups 14 and the yoke 20. As shown in FIG. 15 , each sheet 24 is fixed to the plate-like member 12 by a plurality of fixing plates 26 and a plurality of bolts 28. The fixing plates 26 are made of stainless steel, for example. Similarly, as shown in FIGS. 15 and 17 , a pair of sheets 30 made of silicone rubber are provided to cover the pair of magnets 16. In this reference example, the sheets 30 are provided to cover the magnets 16 and the yoke 22. As shown in FIG. 15 , each sheet 30 is fixed to the plate-like member 12 by a plurality of bolts 32.

[0073] As shown in Figures 13 to 17, in this reference example, the gripping portions 18 are handles. In this reference example, a pair of gripping portions 18 are fixed to both edge portions of the plate-shaped member 12 in the second direction D2. At least a portion of each gripping portion 18 is provided on the other side (lower side) of the center of the plate-shaped member 12 in the first direction D1. In this reference example, the entirety of each gripping portion 18 is provided on the other side (lower side) of the center of the plate-shaped member 12 in the first direction D1. In this reference example, the gripping portions 18 correspond to pulling portions.

[0074] In this embodiment, the gripping portion 18 is made of, for example, aluminum. The surface of the gripping portion 18 is preferably anodized. In this case, electrolytic corrosion between the gripping portion 18 and the plate-like member 12 can be suppressed.

[0075] (Action and effect) In this reference example, the attraction base 10 can be attracted to the surface 2a of the iron pole 2 by the magnetic forces of the first magnet portion 4 (see FIG. 15) and the second magnet portion 6 (see FIG. 15). Here, in this reference example, the attraction force of the first magnet portion 4 is greater than the attraction force of the second magnet portion 6. In addition, in the first direction D1, the first magnet portion 4 is provided on one side (upper side) of the center of the plate-shaped member 12, and the second magnet portion 6 is provided on the other side (lower side) of the center of the plate-shaped member 12. With this configuration, when removing the attraction base 10 from the iron pole 2 (the object to be attracted), the worker can easily separate the second magnet portion 6, which has a weaker attraction force than the first magnet portion 4, from the iron pole 2 by pulling the lower portion of the plate-shaped member 12 in a direction away from the iron pole 2. After the second magnet portion 6 is separated from the iron pole 2, the first magnet portion 4 can be easily separated from the iron pole 2 by the principle of leverage. Therefore, in this reference example, even if the attraction force of the first magnet portion 4 is sufficiently large, the attraction base 10 can be easily removed from the iron pole 2 without using a special operating jig. In other words, even if a strong magnet is used as the magnet for attracting the attraction base 10 to the iron pole 2, the attraction base 10 can be easily removed from the iron pole 2. Note that in this reference example, at least a part of the grip portion 18 is provided on the other side (lower side) of the center of the plate-shaped member 12. This allows the worker to hold the grip portion 18 and easily pull the lower part of the plate-shaped member 12 in a direction away from the iron pole 2. As a result, it becomes even easier to remove the attraction base 10 from the iron pole 2.

[0076] When attaching the attraction base 10 to the iron pole 2, for example, the first magnet portion 4 is attached to the iron pole 2 before the second magnet portion 6. Then, the lower side of the attraction base 10 is moved toward the iron pole 2 using the first magnet portion 4 as a fulcrum, and the second magnet portion 6 is attached to the iron pole 2. Therefore, no special operating tool is required when attaching the attraction base 10 to the iron pole 2. In this way, the attraction base 10 according to this reference example has a simple configuration and can be easily attached to and detached from the object to be attracted (in this reference example, the iron pole 2).

[0077] Furthermore, even if force is applied to the suction base 10 from the other side (bottom side) in the first direction D1 when the suction base 10 is in use, the suction force of the second magnet part 6 can sufficiently prevent the suction base 10 from coming off the object to be attracted (iron pillar 2).

[0078] In this reference example, the multiple magnets 40 that make up the magnet group 14 are arranged symmetrically with respect to the center line L1, thereby enabling the plate-like member 12 to be stably fixed to the iron pillar 2.

[0079] In this reference example, the fixing surface 20a of the yoke 20 supporting the magnet group 14 is inclined with respect to the plate-shaped member 12 so that the distance to the plate-shaped member 12 in the third direction D3 decreases toward the center line L1 (see FIG. 15 ) in the second direction D2. As a result, even when using magnets 40 with a rectangular column shape, as described above, the magnetic pole surface of each magnet 40 can be inclined with respect to the plate-shaped member 12. In this case, when attaching the attachment base 10 to the iron pillar 2, even if the surface 2a of the iron pillar 2 is curved in an arc, the gap between the surface 2a and the magnet 40 can be prevented from becoming large. As a result, the first magnet portion 4 can be attached to the iron pillar 2 with sufficient force. That is, in this reference example, the attachment base 10 can be attached to the iron pillar 2 with sufficient force without using a magnet with a special shape as the magnet 40 constituting the first magnet portion 4. This allows the performance of the attachment base 10 to be improved while reducing the manufacturing cost of the attachment base 10.

[0080] In this reference example, in each magnet group 14, the multiple magnets 40 are arranged so that the magnetic pole faces of adjacent magnets 40 have opposite polarities. In this case, magnetic flux can be efficiently passed between adjacent magnets 40, so even if there is a magnetic gap of paint, rubber, or the like between the object to be attracted (iron pillar 2) and the magnet group 14, sufficient attracting force can be exerted.

[0081] In addition, in this reference example, the magnet group 14 (first magnet portion 4) and the magnet 16 (second magnet portion 6) are covered with sheets 24 and 30 made of silicone rubber. This improves the weather resistance and water resistance of the adsorption base 10 (magnet group 14 and magnet 16). Furthermore, in this reference example, the frictional force generated between the iron pillar 2 and the silicone rubber (sheets 24, 30) is used to improve the vertical load capacity.

[0082] (Other reference examples) 19 and 20 are rear views of an adsorption base according to another embodiment. In the above embodiment, the magnet groups 14 are provided on both sides of the center line L1 in the second direction D2. However, magnets may be provided on the center line L1. For example, as shown in FIG. 19, the magnet groups 14 may be provided on the center line L1. In the above embodiment, the second magnet unit 6 is provided with magnets 16 on both sides of the center line L1 in the second direction D2. However, the number of magnets constituting the second magnet unit 6 may be one or more. Therefore, for example, as shown in FIG. 20, the second magnet unit 6 may be provided with one magnet 16 provided on the center line L1. In both cases where the first magnet unit is provided with multiple magnets and where the second magnet unit is provided with multiple magnets, it is preferable to arrange the multiple magnets symmetrically with respect to the center line L1.

[0083] In the above-described reference example, a case has been described in which gripping portions 18 (handles in this reference example) are provided as pulling portions, but the pulling portions may be configured so that an operator can pull plate-shaped member 12 to one side in third direction D3 (a direction away from iron pillar 2). More specifically, for example, the pulling portions may be configured so that an operator can hook their fingers, and may be holes (holes through which fingers can be hooked) formed in plate-shaped member 12. Furthermore, in the above-described reference example, a case has been described in which a pair of gripping portions 18 are provided on plate-shaped member 12, but the number of pulling portions (grip portions) may be one, or three or more.

[0084] In the above-described reference example, the case where the fixed surface 20a (FIG. 16) of the yoke 20 is inclined with respect to the plate-like member 12 has been described, but the thickness of the yoke 20 may be uniform. Also, for example, one magnetic pole face of each magnet 40 (the magnetic pole face on the iron pillar 2 side) may be inclined with respect to the other magnetic pole face, thereby inclining one magnetic pole face of each magnet 40 with respect to the plate-like member 12.

[0085] Furthermore, each magnet group 14 may be supported by the plate-shaped member 12 so that the inclination of each magnet group 14 relative to the plate-shaped member 12 can be changed according to the shape of the surface of the object to be attracted (e.g., iron pillar 2) as viewed from the first direction D1. FIGS. 21 to 23 are schematic diagrams showing an attraction base according to a modified example. For example, as shown in FIG. 21 , each magnet group 14 may be supported by the plate-shaped member 12 so that it can swing around an oscillation shaft 34 extending in the first direction D1. In this case, for example, both edges of the plate-shaped member 12 in the first direction D1 may be bent, and the oscillation shaft 34 may be supported at the bent portions. Furthermore, the yoke 20 and the yoke 22 may be attached to the oscillation shaft 34 so that it can swing around the oscillation shaft 34. For example, a through hole penetrating the yoke 20 and the yoke 22 in the first direction D1 may be formed, and the oscillation shaft 34 may be passed through the through hole.

[0086] 22, each magnet group 14 may be supported so as to be able to swing via a pair of elastic members 36. In this case, by deforming the pair of elastic members 36, the inclination of each magnet group 14 with respect to the plate-like member 12 can be changed according to the shape of the surface of the object to be attracted (for example, an iron pillar 2).

[0087] 23 , plate-shaped members 13a and 13b may be provided on both sides of the plate-shaped member 12 in the second direction D2. In this reference example, the plate-shaped members 13a and 13b are connected to the plate-shaped member 12 so as to be swingable around swing axes 15a and 15b as swing centers. In this reference example, the supported object 1 is provided on one side in the thickness direction of the plate-shaped member 12, and a plurality of magnet groups 14 are provided on the other side. Specifically, the supported object 1 is fixed to the plate-shaped member 12 so as to be positioned on one side in the thickness direction of the plate-shaped member 12, and the magnet groups 14 are fixed to the plate-shaped members 12, 13a, and 13b, respectively, so as to be positioned on the other side in the thickness direction of the plate-shaped member 12. In this reference example, by swinging plate-shaped members 13a and 13b relative to plate-shaped member 12, the inclination of a pair of magnet groups 14 held by plate-shaped members 13a and 13b relative to plate-shaped member 12 can be changed depending on the surface shape of the object to be attracted (e.g., iron pillar 2).

[0088] In the above-described reference example, the case where the supported object 1 is fixed to the plate-shaped member 12 has been described, but the supported object 1 does not have to be fixed directly to the plate-shaped member 12. For example, the supported object 1 may be fixed to a member (hereinafter referred to as a fixing member) separate from the plate-shaped member 12, and the plate-shaped member 12 may support the fixing member in a swingable manner. In this case, the position of the supported object 1 relative to the plate-shaped member 12 can be adjusted by making it possible to fix the position of the fixing member relative to the plate-shaped member 12 at a desired position.

[0089] The object to which the attraction base 10 is attracted is not limited to the iron pole 2, and the attraction base 10 may be attracted to a wall or the like made of a magnetic material such as steel. [Industrial Applicability]

[0090] According to the present invention, an attraction base that is easy to remove even when a strong magnet is used can be obtained. [Explanation of symbols]

[0091] 1. Support object 2 Iron Pillars 11 Suction base 50 Plate-shaped member 52 Magnet section 54 Support part 56 Gripping part 58,60 seats 62 Cover plate 64 Magnet 66 York

Claims

1. An adsorption base that can be attached to a curved surface having a cross section that is curved in an arc shape, a plate-like member configured to be able to hold an object on one side in a thickness direction; a pair of magnet portions provided on the other side of the plate-shaped member in the thickness direction; a pair of support portions provided on the other side of the plate-like member in the thickness direction, the pair of support parts are made of a magnetic material other than a permanent magnet or a non-magnetic material, In a first direction perpendicular to the thickness direction, the pair of magnet portions are provided on one side of a first center line of the plate-like member extending in a second direction perpendicular to the thickness direction and the first direction, and the pair of support portions are provided on the other side of the first center line, In the second direction, one of the magnet portions and one of the support portions is provided on one side of a second center line of the plate-like member extending in the first direction, and the other of the magnet portion and the other of the support portion is provided on the other side of the second center line, each of the pair of magnet portions has an attraction surface that faces the curved surface when the attraction base is attached to the curved surface; each of the pair of support portions has a support surface that faces the curved surface when the suction base is attached to the curved surface; The suction surface and the support surface are each inclined relative to the plate-like member so that the distance from the plate-like member in the thickness direction becomes closer or farther toward the first center line in the first direction, or are inclined relative to the plate-like member so that the distance from the plate-like member in the thickness direction becomes closer or farther toward the second center line in the second direction.

2. The adsorption base according to claim 1 , wherein each of the pair of magnet portions includes a rare earth magnet.

3. The suction base according to claim 1 , further comprising a pulling portion provided on the other side of the first center line in the first direction, the pulling portion enabling an operator to pull the plate-like member to one side in the thickness direction.

4. The suction base according to claim 3 , wherein the pull portion is a grip portion that can be gripped by the worker, and at least a portion of the grip portion is provided on the other side of the first center line in the first direction.

5. each of the pair of magnet portions includes a plurality of magnets; Each magnet of the magnet portion has a magnetic pole surface on one side and the other side in the thickness direction, The adsorption base according to claim 1 , wherein the magnetic pole faces of the adjacent magnets in the magnet portion have opposite polarities.

6. the pair of magnet portions are arranged to be symmetrical with respect to the second center line, The suction base according to claim 1 , wherein the pair of support portions are arranged so as to be symmetrical with respect to the second center line.

7. each of the pair of magnet portions includes a magnet and a yoke provided on one side or the other side of the magnet in the thickness direction; 2. The adsorption base according to claim 1, wherein in each magnet portion, one of the magnet and the yoke has a dimension in the thickness direction that is smaller or larger toward the first center line in the first direction, or a dimension in the thickness direction that is smaller or larger toward the second center line in the second direction.

8. The adsorption base according to claim 1 , wherein the pair of magnet portions and the pair of support portions are covered with a sheet made of silicone rubber.

9. The suction base according to claim 1 , wherein both edge portions of the plate-like member in the second direction are bent to be L-shaped when viewed from the first direction.

10. The attraction base according to claim 1 , wherein the magnet portion and the support portion are supported by the plate-like member so that the inclination of the attraction surface and the support surface relative to the plate-like member can be changed.

Images