Magnetism adsorbing device

Abstract

To provide a magnetism adsorbing device which can be easily switched to an adsorption state (the ON state).SOLUTION: The magnetism adsorbing device includes: a first member having at least one permanent magnet; and a second member having at least one permanent magnet. The magnetism adsorbing device can hold a magnetic body by magnetic adsorption force. The first member and the second member can be relatively displaced between a first switch position, in which a magnetic flux of a permanent magnet is directed to the outside of the magnetism adsorbing device, and a second switch position, in which a magnetic flux of a permanent magnet is closed in the inside of the magnetism adsorbing device. The magnetism adsorbing device includes a biasing member for biasing the first member and the second member toward the direction of the first switch position.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a magnetic attraction device. [Background technology]

[0002] The present invention relates to a magnetic attraction device that holds a magnetic body by magnetic force, which is known, for example, from Patent Document 1. The magnetic attraction device described in Patent Document 1 has two fixed permanent magnets arranged diagonally opposite each other, a ferromagnetic block having an attraction portion that attracts a magnetic body, and a permanent magnet assembly that is mounted in the inner cavity of the ferromagnetic block so as to be rotatable about its axis. The permanent magnet assembly is a rod-shaped magnetic member having a permanent magnet incorporated in the center thereof, and has a north pole and a south pole on both sides of the magnetic member. A handle is attached to the permanent magnet assembly, and the assembly can be rotated within an angular range of 180° by operating the handle.

[0003] As shown in Fig. 4 of Patent Document 1, when the handle is in a predetermined position in this magnetic attraction device, the magnetic force of the fixed permanent magnet is cancelled by the magnetic force of the permanent magnet assembly, and no magnetic flux leaks to the attraction portion, so the magnetic body (attached member) is not attracted to the attraction portion. On the other hand, when the handle is rotated from the predetermined position, magnetic flux leaks between the fixed permanent magnet and the permanent magnet assembly between the attraction portions, so the magnetic body can be attracted to the attraction portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2002-518268 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the magnetic attraction device of Patent Document 1, when the permanent magnet assembly is rotated by operating the handle, the repulsive force between the magnetic poles of the fixed permanent magnet and the N-pole and S-pole of the permanent magnet assembly is large, and the handle switching torque is large. For this reason, especially when attracting thin plates or round bars, the handle is heavy when switching to the attraction state (ON state), and there are cases where attraction switching cannot be performed depending on the thickness of the flat plate or the size and thickness of the steel pipe.

[0006] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a magnetic attraction device that can be easily switched to an attraction state (ON state). [Means for solving the problem]

[0007] The above object of the present invention can be achieved by the following configuration [1]. [1] A first member having at least one permanent magnet; a second member having at least one permanent magnet; A magnetic adsorption device capable of holding a magnetic body by a magnetic adsorption force, The first member and the second member are relatively displaceable between a first switching position in which the magnetic flux of the permanent magnet is directed to the outside of the magnetic attraction device and a second switching position in which the magnetic flux of the permanent magnet is closed to the inside of the magnetic attraction device, a biasing member that biases the first member and the second member in a direction toward the first exchange position; A magnetic adsorption device characterized by: Effect of the Invention

[0008] According to the magnetic attraction device of the present invention, it is easy to switch to the attraction state (ON state). [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a magnetic attraction device according to the present embodiment, showing an attraction state (ON state). [Diagram 2]FIG. 2 is a perspective view taken along the plane II-II in FIG. 1, showing the adsorption state (ON state). [Diagram 3] FIG. 3 is an enlarged view of part III in FIG. [Figure 4] FIG. 4 is an enlarged view of a portion IV in FIG. [Diagram 5] FIG. 5 is a diagram showing a transition from the adsorption state (ON state) of FIG. 2 to the release state (OFF state). [Figure 6] FIG. 6 is an enlarged view of a portion VI in FIG. [Figure 7] FIG. 7 is an enlarged view of portion VII of FIG. [Figure 8] FIG. 8 is a perspective view taken along plane VIII-VIII in FIG. 1, showing the adsorption state (ON state). [Figure 9] FIG. 9 is a perspective view taken along the plane IX-IX in FIG. [Figure 10] FIG. 10 is a perspective view taken along the plane XX in FIG. 1, showing the adsorption state (ON state). [Figure 11] FIG. 11 is a perspective view of the housing. [Figure 12] FIG. 12 is a front view of the housing as viewed from the Z direction. [Figure 13] FIG. 13 is a cross-sectional view taken along the line XIII-XIII in FIG. [Figure 14] FIG. 14 is a cross-sectional view taken along line XIV-XIV of FIG. [Figure 15] FIG. 15 is a perspective view of the slider. [Figure 16] FIG. 16 is a front view of the slider as viewed from the Z direction. [Figure 17] FIG. 17 is a cross-sectional view taken along the line XVII-XVII of FIG. [Figure 18] FIG. 18 is a cross-sectional view taken along the line XVIII-XVIII in FIG. [Figure 19] FIG. 19 is a diagram showing a schematic diagram of the positional relationship between the housing, the iron pins in the slider, and the permanent magnets in the ON state. [Figure 20] FIG. 20 is a diagram showing a schematic diagram of the positional relationship between the housing, the iron pins in the slider, and the permanent magnets in the OFF state. [Figure 21] FIG. 21 is a diagram showing a schematic diagram of the positional relationship between the housing, the iron pins in the slider, and the permanent magnets in the ON state according to the modified example. [Figure 22] FIG. 22 is a diagram showing a schematic diagram of the positional relationship between the housing, the iron pins in the slider, and the permanent magnets in the OFF state according to the modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] FIG. 1 is a perspective view of the magnetic adsorption device according to the present embodiment, showing an adsorption state (ON state). FIG. 2 is a perspective view cut along the II-II plane in FIG. 1, showing an adsorption state (ON state). FIG. 3 is an enlarged view of a portion III in FIG. 2. FIG. 4 is an enlarged view of a portion IV in FIG. 2. FIG. 5 is a diagram showing a transition from the adsorption state (ON state) in FIG. 2 to a release state (OFF state). FIG. 6 is an enlarged view of a portion VI in FIG. 5. FIG. 7 is an enlarged view of a portion VII in FIG. 5. FIG. 8 is a perspective view cut along the VIII-VIII plane in FIG. 1, showing an adsorption state (ON state). FIG. 9 is a perspective view cut along the IX-IX plane in FIG. 1. FIG. 10 is a perspective view cut along the XX plane in FIG. 1, showing an adsorption state (ON state).

[0011] 1, the magnetic attraction device 1 includes a housing 10 as a first member, a slider 20 as a second member accommodated in the housing 10 so as to be retractable, and a cover member 30 fixed to the housing 10 and covering the slider 20. As described below, the housing 10 and the slider 20 include permanent magnets 43 and 48, respectively, and the magnetic attraction device 1 can hold a magnetic body by magnetic attraction force by controlling the magnetic flux circuits of the permanent magnets 43 and 48.

[0012] <Housing 10> The housing 10 is a box body that holds the slider 20 so that it can move relatively. The slider 20 is accommodated in the housing 10 so that it can move linearly relative to the housing 10. In the drawings, the linear movement direction of the slider 20 is shown as the X direction, the width direction of the housing 10 and the slider 20 which is perpendicular to the X direction is shown as the Y direction, and the thickness direction of the housing 10 and the slider 20 which is perpendicular to the X direction is shown as the Z direction. The cover member 30 is fixed to the housing 10 so as to cover the slider 20 from the Z direction.

[0013] Fig. 11 is a perspective view of the housing 10. Fig. 12 is a front view of the housing 10 as viewed from the Z direction. Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12. Fig. 14 is a cross-sectional view taken along line XIV-XIV in Fig. 12.

[0014] 11 to 14, the housing 10 includes a substantially rectangular parallelepiped base 11, a substantially planar upper wall 13 and a substantially planar lower wall 15 extending in the Z direction from both X-direction edges of the base 11, and a substantially planar left wall 17 and a substantially planar right wall 19 extending in the Z direction from both Y-direction edges of the base 11. A slider 20 is accommodated in such a bottomed box-like housing 10 so as to be retractable. Note that "upper", "lower", "left" and "right" are merely descriptions of positions in FIG. 11 for the sake of convenience, and do not limit the positions of the magnetic adsorption device 1 in an actual use state.

[0015] 9 in addition to Figs. 11 to 14, the base 11 has a plurality of through holes 11a, 11b, and 11c penetrating the base 11 in the Y direction. In this embodiment, the three through holes 11a, 11b, and 11c are arranged adjacent to each other with a gap in the X direction. As shown in Fig. 14, the cross-sectional shape of the through holes 11a, 11b, and 11c is substantially square. The number and shape of the through holes 11a, 11b, and 11c are not particularly limited.

[0016] 9, two substantially cylindrical iron pins 41 extending in the Z direction are disposed in each of the through holes 11a, 11b, and 11c. The iron pins 41 are made of, for example, an iron alloy, but the material is not limited as long as the iron pins are ferromagnetic. The two iron pins 41, 41 disposed in the through holes 11a, 11b, and 11c, respectively, are disposed at intervals on both sides in the Y direction with respect to the center of the through holes 11a, 11b, and 11c in the Y direction.

[0017] The iron pin 41 is fixed by a fixing pin 42 that is fitted and fixed in the openings on both sides in the Y direction of the through holes 11a, 11b, and 11c. The fixing pin 42 has a substantially semi-cylindrical holding portion 42a at its tip on the center side in the Y direction, which holds the iron pin 41. The iron pin 41 may be fixed by the holding portion 42a using an adhesive or the like.

[0018] In the through hole 11a on the upper wall 13 side, there is an air gap between the two iron pins 41. On the other hand, in the other through holes 11b and 11c, a permanent magnet 43 is disposed between the two iron pins 41. The permanent magnet 43 is made of, for example, an alloy of neodymium, iron, and boron. The permanent magnet 43 in the through hole 11b is magnetized in the Y direction, with the left wall 17 side being the N pole and the right wall 19 side being the S pole. The permanent magnet 43 in the through hole 11c is also magnetized in the Y direction, but the magnetization direction is opposite to that of the permanent magnet 43 in the through hole 11b, with the left wall 17 side being the S pole and the right wall 19 side being the N pole.

[0019] 11 to 14, the base 11 has six iron pin holes 44 that penetrate the base 11 in the Z direction and communicate with the through holes 11a, 11b, and 11c. The six iron pin holes 44 are provided at positions that overlap with the six iron pins 41 when viewed from the Z direction, allowing the iron pins 41 to be inserted and fixed.

[0020] A first recess 11e extending in the X direction is recessed in the center in the Y direction on the inner surface 11d of the base 11 on which the upper wall 13, the lower wall 15, the left wall 17, and the right wall 19 are erected. As shown in Figures 12 and 13, the first recess 11e is formed between the three iron pin holes 44 on the left wall 17 side and the three iron pin holes 44 on the right wall 19. An end of the first recess 11e on the upper wall 13 side is connected to the upper wall 13, while an end of the first recess 11e on the lower wall 15 side is terminated with a small gap between it and the lower wall 15.

[0021] In the ON state shown in Figures 1 to 4, etc., magnetic flux from the permanent magnets 43, 48 leaks to the outer surface 11g (see Figures 13 and 14), which is the surface of the base 11 opposite the inner surface 11d in the Z direction, and therefore, in this case, the outer surface 11g functions as an attraction surface capable of attracting and holding a magnetic body.

[0022] 11 and 13, a second recess 17b extending in the X direction is formed in an inner surface 17a of the left wall 17 facing the right wall 19. An end of the second recess 17b on the upper wall 13 side terminates with a small gap between it and the upper wall 13, and an end of the second recess 17b on the lower wall 15 side terminates with an end of the left wall 17 on the lower wall 15 side with a small gap between it and the upper wall 13.

[0023] Similarly, a third recess 19b extending in the X direction is formed in an inner surface 19a of the right wall 19 facing the left wall 17. As shown in Fig. 14, an end of the third recess 19b on the upper wall 13 side terminates with a small gap between it and the upper wall 13, and an end of the third recess 19b on the lower wall 15 side terminates with an end of the right wall 19 on the lower wall 15 side with a small gap between it and the upper wall 13,

[0024] As described later, the first recess 11e, the second recess 17b, and the third recess 19b function as slide rails that accommodate and linearly guide the first convex portion 21d, the second convex portion 49b, and the third convex portion 21f of the slider 20, respectively.

[0025] 11 and 13, the left wall 17 and the right wall 19 have a larger dimension in the Z direction than the upper wall 13 and the lower wall 15. Then, as shown in Fig. 1, the cover member 30 is fixed so as to fill in the step portions in the Z direction between the left wall 17 and the right wall 19 and the upper wall 13 and the lower wall 15. The left wall 17 and the right wall 19 are provided with screw holes 17c, 19c that penetrate the left wall 17 and the right wall 19 in the Y direction. Referring also to Fig. 1, the cover member 30 is fixed to the housing 10 by screws 50 inserted into the screw holes 17c, 19c.

[0026] A plurality of thin rod-like projections 17e, 19e, 42b protruding in the Y direction and extending in the Z direction are formed in a line on outer surfaces 17d, 19d of the left wall 17 and the right wall 19 opposite to the inner surfaces 17a, 19a, and on the outer surface of the fixing pin 42 housed in the through-holes 11a, 11b, 11c. By providing the side surfaces on both sides of the magnetic attraction device 1 in the Y direction with an uneven shape in this way, the worker can grip it reliably, improving workability.

[0027] Both ends of the upper wall 13 in the Y direction are connected to the left wall 17 and the right wall 19. On the other hand, both ends of the lower wall 15 in the Y direction are not connected to the left wall 17 and the right wall 19, and a pair of gaps S are formed. A part of a slider 20 described later is inserted into the pair of gaps S.

[0028] <Slider 20>

[0029] Fig. 15 is a perspective view of the slider 20. Fig. 16 is a front view of the slider 20 as viewed from the Z direction. Fig. 17 is a cross-sectional view taken along line XVII-XVII in Fig. 16. Fig. 18 is a cross-sectional view taken along line XVIII-XVIII in Fig. 16.

[0030] As shown in FIGS. 15 to 18, the slider 20 includes a main body portion 21 that is a portion that is mainly accommodated in the housing 10, and a handle portion 23 that extends from the side of the main body portion 21 in the X direction and can be gripped by an operator.

[0031] The main body 21 has a substantially rectangular parallelepiped shape, and is formed with a groove 22, a through groove 24, a first convex portion 21d, a second convex portion 49b, a third convex portion 21f, etc., as described below.

[0032] Groove portions 22 for accommodating springs 45 (see FIGS. 8 and 10) serving as biasing members are recessed in both side surfaces 21b in the Y direction of the main body portion 21. The groove portions 22 have a generally rectangular parallelepiped shape extending in the X direction and are open in the Z direction toward the inner side surface 21c of the main body portion 21 (the inner side surface 11d of the housing 10).

[0033] A through groove 24 is formed in the center in the Y direction on the bottom surface 21a of the main body 21, which is the surface on the bottom wall 15 side of the housing 10 in the X direction. The through groove 24 is provided to allow relative displacement of the slider 20 with respect to the housing 10. If the through groove 24 is not formed, when the slider 20 is moved linearly in the X direction, it will come into contact with the bottom wall 15 of the housing 10, restricting the linear movement. The through groove 24 penetrates the main body 21 in the Z direction. Furthermore, the Y direction dimension of the through groove 24 is at least greater than the Y direction dimension of the bottom wall 15 of the housing 10.

[0034] Furthermore, a pair of legs 23a, 23a of the handle portion 23 extend from both sides of the through groove 24 in the Y direction on the lower surface 21a of the main body portion 21. The tips of the pair of legs 23a, 23a are connected to each other by a connection portion 23b extending in the Y direction. An operator can insert and remove the slider 20 by gripping the handle portion 23.

[0035] The main body 21 has four iron pin holes 46 that penetrate the main body 21 in the Z direction and communicate with the housing grooves 25a, 25b described below. The four iron pin holes 46 are provided at positions that overlap with four iron pin holes 44 (see FIG. 12, etc.) in two upper rows on the upper wall 13 side of the housing 10 when viewed from the Z direction in the adsorption state (ON state) shown in FIGS. 1 to 4, etc. Iron pins 47 can be inserted and fixed into these iron pin holes 46, as described below.

[0036] A first protrusion 21d extending in the X direction is provided protruding from the inner surface 21c of the main body 21 facing the inner surface 11d of the housing 10 at the center in the Y direction. As shown in Fig. 15 and Fig. 16, the first protrusion 21d is formed between two iron pin holes 46 on one side in the Y direction and two iron pin holes 46 on the other side in the Y direction. The lower end (through groove 24 side) of the first protrusion 21d terminates with a small gap between it and the through groove 24, and the upper end of the first protrusion 21d extends to the upper surface 21e of the main body 21. The first protrusion 21d is accommodated in the first recess 11e of the housing 10 to guide its linear movement in the X direction.

[0037] 2 and 18, the housing portion 25 is recessed toward the Y direction on the left side surface 21b of the main body portion 21. The housing portion 25 includes a pair of housing grooves 25a, 25b extending toward the Y direction on the upper surface 21e side from the through groove 24, and a gap portion 25c connecting the left base ends of the pair of housing grooves 25a, 25b. Therefore, it can be said that the housing portion 25 has a shape in which the pair of housing grooves 25a, 25b are branched from the gap portion 25c arranged on the left side. Of the pair of housing grooves 25a, 25b, the upper housing groove is indicated by reference symbol 25a in the drawings, and the lower housing groove is indicated by reference symbol 25b.

[0038] The pair of accommodation grooves 25a, 25b are arranged at a distance from each other in the X direction, and two substantially cylindrical iron pins 47 extending in the Z direction are arranged in each accommodation groove 25a, 25b. The iron pins 47 are made of, for example, an iron alloy, but the material is not limited as long as they are ferromagnetic. The two iron pins 47, 47 arranged in each accommodation groove 25a, 25b are arranged at a distance from each other on both sides in the Y direction with respect to the center of the main body 21 in the Y direction. The pair of accommodation grooves 25a, 25b have the above-mentioned four iron pin holes 46 communicating in the Z direction, and the iron pins 47 are inserted and fixed into each iron pin hole 46.

[0039] In each of the housing grooves 25a and 25b, a permanent magnet 48 is disposed between the two iron pins 47, 47. The permanent magnet 48 is made of, for example, an alloy of neodymium, iron, and boron. The permanent magnet 48 in the upper housing groove 25a is magnetized in the Y direction, with the left side being the N pole and the right side being the S pole. The permanent magnet 48 in the lower housing groove 25b is also magnetized in the Y direction, but the magnetization direction is opposite to that of the permanent magnet 43 in the upper housing groove 25a, with the left side being the S pole and the right side being the N pole.

[0040] The end face 25d of the accommodation grooves 25a, 25b opposite the gap portion 25c (the end face on the right side in the figure) is semi-cylindrical corresponding to the shape of the iron pin 47, and the right iron pin 47 is held and fixed by this end face 25d. The two iron pins 47 on the left side are supported by a pair of fixing pins 49, 49 inserted and fixed in the respective accommodation grooves 25a, 25b via the gap portion 25c. The pair of fixing pins 49, 49 have a substantially semi-cylindrical holding portion 49a at their tips on the center side in the Y direction that holds the iron pin 47. The iron pin 41 may be fixed to the accommodation grooves 25a, 25b and the fixing pins 49 using an adhesive or the like.

[0041] 2 and 3, each of the pair of fixing pins 49, 49 has a second protrusion 49b that protrudes in the Y direction toward the second recess 17b on a surface facing the second recess 17b of the left wall 17 of the housing 10. The second protrusions 49b, 49b of the pair of fixing pins 49, 49 are received in the second recess 17b of the housing 10 to guide linear movement in the X direction.

[0042] The pair of fixing pins 49, 49 are disposed apart from each other in the X direction, and a first spring insertion hole 51 is formed between the pair of fixing pins 49, 49. As shown in Fig. 10, the first spring insertion hole 51 extends in the Z direction and communicates with the groove portion 22 on the left side in Fig. 8. Therefore, when a compressed spring 45 is inserted into the first spring insertion hole 51, the spring 45 extends in the X direction and is disposed in the groove portion 22.

[0043] As shown in Fig. 8 and Fig. 10 to Fig. 12, the inner surface 11d of the base 11 of the housing 10 is provided with a protrusion 11f that protrudes in the Z direction so as to enter the lower end of the groove 22 of the slider 20. As a result, the upper end of the spring 45 arranged in the groove 22 abuts against the fixing pin 49 that constitutes the groove 22 of the slider 20, and the lower end abuts against the protrusion 11f of the housing 10. At this time, the spring 45 is in a compressed state shorter than its natural length, and a force that presses in the vertical direction is applied by the spring 45. Therefore, the housing 10 and the slider 20 are always given a biasing force by the spring 45 in a direction that brings them closer to each other, that is, in a direction toward the adsorption state (ON state).

[0044] 4, the main body 21 of the slider 20 has a third convex portion 21f that protrudes in the Y direction toward the third concave portion 19b on a side surface 21b facing the third concave portion 19b of the right wall 19 of the housing 10. The third convex portion 21f is received in the third concave portion 19b of the housing 10 to guide linear movement in the X direction.

[0045] In the main body 21, a second spring insertion hole 52 is formed at a position symmetrical in the Y direction to the first spring insertion hole 51 with respect to the center of the main body 21 in the Y direction. The second spring insertion hole 52 extends in the Z direction and communicates with the groove portion 22 on the right side in Fig. 8. Therefore, when a compressed spring 45 is inserted into the second spring insertion hole 52, the spring 45 expands and is disposed in the groove portion 22.

[0046] As shown in Fig. 8, Fig. 11 to Fig. 12, and Fig. 14, the inner surface 11d of the base 11 of the housing 10 is provided with a protrusion 11f that protrudes in the Z direction so as to enter the lower end of the groove 22 of the slider 20. As a result, the upper end of the spring 45 arranged in the groove 22 abuts against the main body 21 that constitutes the groove 22, and the lower end abuts against the protrusion 11f. At this time, the spring 45 is in a compressed state shorter than its natural length, and a force that presses in the vertical direction is applied by the spring 45. Therefore, the housing 10 and the slider 20 are always given a biasing force by the spring 45 in a direction that brings them closer to each other, i.e., in a direction toward the adsorption state (ON state).

[0047] In this way, by providing a spring 45 in a pair of left and right groove portions 22, 22 that urges the housing 10 and the slider 20 in a linear direction (X direction) toward the ON state, the torque required when switching from the OFF state to the ON state can be reduced, improving operability.

[0048] In addition, the first recess 11e, the second recess 17b, and the third recess 19b of the housing 10 function as slide rails that accommodate the first convex portion 21d, the second convex portion 49b, and the third convex portion 21f of the slider 20, respectively, and guide the relative linear movement. This allows for smooth linear movement of the slider 20. By using a sliding type linear guide, the size of the magnetic attraction device 1 can be made smaller than when a rolling type linear guide is used.

[0049] The first recess 11e, the second recess 17b, and the third recess 19b of the housing 10, and the first convex portion 21d, the second convex portion 49b, and the third convex portion 21f of the slider 20 are preferably covered with a low-friction material such as polytetrafluoroethylene (PTFE), nylon, urethane, polyimide, etc. This makes it possible to realize a smoother linear motion guide mechanism.

[0050] Regarding covering the first recess 11e and the first protrusion 21d with the low-friction material, only the first recess 11e and the first protrusion 21d may be covered with the low-friction material, but the surrounding iron pins 41, 47 and the inner surfaces 11d, 21c may also be covered with the low-friction material. That is, the entire area A surrounded by the dotted line in Fig. 12 or the entire area B surrounded by the dotted line in Fig. 16 may be covered with the low-friction material.

[0051] It is preferable to fill the first recess 11e, the second recess 17b, and the third recess 19b of the housing 10 and the first convex portion 21d, the second convex portion 49b, and the third convex portion 21f of the slider 20 with a lubricant such as grease. This makes it possible to realize a smoother linear motion guide mechanism.

[0052] <Cover member 30> As shown in Fig. 1, among the lid members 30, the outer surface 31, which is the surface on the side opposite to the base portion 11 in the Z direction, has a substantially planar shape. The outer surface 31 has a plurality of convex portions 33 provided with bolt holes 33a for fixing various applications. Examples of the applications fixed to the outer surface 31 include robot hands and various tools, etc., but are not particularly limited.

[0053] On the side surface of the lid member 30 in the X direction, a pair of leg portions 35a, 35a of the handle portion 35 extend. The tip portions of the pair of leg portions 35a, 35a are connected by a connecting portion 23b extending in the Y direction. In the adsorption state (ON state) as shown in Fig. 1, the handle portion 35 of the lid member 30 and the handle portion 23 of the slider 20 are in overlapping positions.

[0054] <Switching between ON state and OFF state> In the magnetic adsorption device 1 configured as described above, the housing 10 and the slider 20 can be relatively displaced between an ON position as a first switching position where the magnetic fluxes of the permanent magnets 43, 48 are directed outside the magnetic adsorption device 1, and an OFF position as a second switching position where the magnetic fluxes of the permanent magnets 43, 48 are closed inside the magnetic adsorption device 1. That is, by inserting the slider 20 into the housing 10, the ON position as shown in Figs. 1 to 4 can be set, and by pulling out the slider 20 from the housing 10, the OFF position as shown in Figs. 5 to 7 can be set.

[0055] Fig. 19 is a diagram schematically showing the positional relationship of the iron pins 41, 47 and the permanent magnets 43, 48 in the housing 10 and the slider 20 in the ON state. Fig. 20 is a diagram schematically showing the positional relationship of the iron pins 41, 47 and the permanent magnets 43, 48 in the housing 10 and the slider 20 in the OFF state. Note that in Figs. 19 and 20, the housing 10 and the slider 20 viewed from the Z direction are shown shifted in parallel in the horizontal direction. However, it should be noted that in reality, the housing 10 and the slider 20 are arranged to overlap when viewed from the Z direction.

[0056] In the adsorption state (ON state) shown in Figures 1 to 4 and 19, the slider 20 is inserted into the housing 10, and the two rows of iron pins 47 and permanent magnets 48 of the slider 20 overlap the upper two rows of iron pins 41 and permanent magnets 43 of the housing 10 when viewed from the Z direction.

[0057] In this case, the magnetic flux of the permanent magnets 48 in the upper row of the slider 20 is directed to the outside of the magnetic attraction device 1 via a pair of iron pins 47, 47 on both sides in the Y direction and a pair of iron pins 41, 41 in the upper row of the housing 10.

[0058] The magnetic flux of the permanent magnets 48 in the lower row of the slider 20 is directed to the outside of the magnetic attraction device 1 via a pair of iron pins 47, 47 on both sides in the Y direction and a pair of iron pins 41, 41 in the upper row of the housing 10.

[0059] The magnetic flux of the permanent magnets 43 in the middle row of the housing 10 is directed to the outside of the magnetic attraction device 1 via a pair of iron pins 41, 41 on both sides in the Y direction and a pair of iron pins 47, 47 in the lower row of the slider 20.

[0060] The magnetic flux of the permanent magnets 43 in the lower row of the housing 10 is directed to the outside of the magnetic attraction device 1 via a pair of iron pins 41, 41 on both sides in the Y direction.

[0061] In the ON state, the magnetic flux of the permanent magnets 43, 48 leaks to, for example, an outer surface 11g (see FIGS. 13 and 14) opposite to the inner surface 11d of the base 11 of the housing 10, and this outer surface 11g functions as an attraction surface capable of attracting and supporting a magnetic body. Therefore, by attracting the outer surface 11g as an attraction surface to the surface of a ferromagnetic body, the magnetic attraction device 1 can be fixed to the ferromagnetic body.

[0062] Usually, when the slider 20 is inserted into the housing 10 to set it to the ON state, the repulsive force between the magnetic poles of the N pole and the S pole of the permanent magnets 43, 48 is large, and the switching torque may be large. However, in this embodiment, as described above, the pair of left and right grooves 22, 22 are provided with the springs 45 that urge the housing 10 and the slider 20 in the linear direction (X direction) toward the ON state, so that the torque required when switching from the OFF state to the ON state can be reduced, and operability can be improved.

[0063] In the released state (OFF state) shown in Figures 5 to 7 and 20, the slider 20 is pulled out from the housing 10, and the two rows of iron pins 47 and permanent magnets 48 of the slider 20 overlap the lower two rows of iron pins 41 and permanent magnets 43 of the housing 10 when viewed from the Z direction.

[0064] In this case, the magnetic flux of the upper row of permanent magnets 48 of the slider 20 and the magnetic flux of the middle row of permanent magnets 43 of the housing 10 are cancelled out via the pairs of iron pins 47, 47, 41, 41 on both sides in the Y direction, and are confined inside the magnetic attraction device 1 and do not leak to the outside. At this time, the outer surface 11g as an attraction surface is not attracted to a ferromagnetic material.

[0065] For example, when various applications such as a robot hand are fixed to the protrusion 33 of the cover member 30, the magnetic attraction device 1 can be detachably fixed to any position on the ferromagnetic body, which is highly convenient. In addition, if a band that can be wrapped around the worker's arm is provided on the cover member 30 side, a work tool or the like can be attached to the outer surface 11g serving as the attraction surface. The worker can attach and detach the work tool by switching the magnetic attraction device 1 ON / OFF during work.

[0066] The present invention is not limited to the above-described embodiment, and modifications and improvements are possible as appropriate.

[0067] Fig. 21 is a diagram showing a schematic diagram of the positional relationship between the iron pins 41, 47 and the permanent magnets 43, 48 in the housing 10 and the slider 20 in the ON state according to the modified example. Fig. 22 is a diagram showing a schematic diagram of the positional relationship between the iron pins 41, 47 and the permanent magnets 43, 48 in the housing 10 and the slider 20 in the OFF state according to the modified example.

[0068] In the above-described embodiment, as shown in Figures 19 and 20, the housing 10 includes three rows of two iron pins 41 and one permanent magnet 43, and the slider 20 includes two rows of two iron pins 47 and one permanent magnet 48. However, the number of iron pins 41, 47 and permanent magnets 43, 48 in each row and the number of rows are not particularly limited, and for example, configurations as shown in Figures 21 and 22 may be adopted.

[0069] 21 and 22, the housing 10 has four rows of three iron pins 41 and two permanent magnets 43, and the slider 20 has three rows of three iron pins 47, 47 and two permanent magnets 48. With this configuration, it is possible to realize a magnetic attraction device 1 that has a predetermined attraction force while significantly reducing the size of the iron pins 41, 47 and the permanent magnets 43, 48.

[0070] As described above, the present specification discloses the following: (1) a first member having at least one permanent magnet; a second member having at least one permanent magnet; A magnetic adsorption device capable of holding a magnetic body by a magnetic adsorption force, The first member and the second member are relatively displaceable between a first switching position in which the magnetic flux of the permanent magnet is directed to the outside of the magnetic attraction device and a second switching position in which the magnetic flux of the permanent magnet is closed to the inside of the magnetic attraction device, a biasing member that biases the first member and the second member in a direction toward the first exchange position; A magnetic adsorption device characterized by: (2) The first member and the second member are capable of moving linearly relative to each other, The first member has at least one recess extending along a linear motion direction, The second member has at least one protrusion extending along a linear motion direction, The protrusion of the second member is accommodated in the recess of the first member, so that the relative linear movement between the first member and the second member is guided by sliding. A magnetic adsorption device as described in (1). (3) The recess of the first member and the protrusion of the second member are covered with a low friction material. A magnetic adsorption device as described in (2). (4) A lubricant is filled in the recess of the first member and the protrusion of the second member. A magnetic adsorption device as described in (2). [Explanation of symbols]

[0071] 1. Magnetic adsorption device 10 Housing (first member) 11 Base 11a,11b,11c through hole 11d Inside surface 11e First recess (recess) 11f protrusion 11g outer surface 13 Upper Wall 15 Lower wall 17 Left Wall 17a Inside surface 17b Second recess (recess) 17c screw hole 17d External surface 17e protrusion 19 Right wall 19a Inside surface 19b Third recess (recess) 19c screw hole 19d External surface 19e protrusion 20 Slider (second component) 21 Main body 21a Bottom side 21b Side 21c inner surface 21d First convex part (convex part) 21e Top 21f Third convex part (convex part) 22 Groove 23 Handle 23a Legs 23b Connection 24 Through groove 25 Storage unit 25a, 25b Receiving groove 25c void area 25d end face 30 Lid member 31 External surface 33 Convex 33a Bolt hole 35 Handle 35a Legs 35b Connection 41 Iron Pin 42 Fixing pin 42a Holding part 42b protrusion 43 Permanent Magnets 44 Iron pin hole 45 Spring (biasing member) 46 Iron pin hole 47 Iron Pin 48 Permanent Magnets 49 Fixing pin 49a Holding part 49b Second convex part (convex part) 50 Screw 51 First spring insertion hole 52 Second spring insertion hole S void

Claims

1. a first member having at least one permanent magnet; a second member having at least one permanent magnet; A magnetic adsorption device capable of holding a magnetic body by a magnetic adsorption force, The first member and the second member are relatively displaceable between a first switching position in which the magnetic flux of the permanent magnet is directed to the outside of the magnetic attraction device and a second switching position in which the magnetic flux of the permanent magnet is closed to the inside of the magnetic attraction device, a biasing member that biases the first member and the second member in a direction toward the first exchange position; A magnetic adsorption device characterized by:

2. The first member and the second member are capable of moving linearly relative to each other, The first member has at least one recess extending along a linear motion direction, The second member has at least one protrusion extending along a linear motion direction, The protrusion of the second member is accommodated in the recess of the first member, so that the relative linear movement between the first member and the second member is guided by sliding. The magnetic adsorption device according to claim 1 .

3. The recess of the first member and the protrusion of the second member are covered with a low friction material. The magnetic adsorption device according to claim 2 .

4. A lubricant is filled in the recess of the first member and the protrusion of the second member. The magnetic adsorption device according to claim 2 .

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