JP5617883B2 - Magnetic adsorption device - Google Patents

Description

  The present invention relates to a magnetic adsorption device that holds a magnetic material by a magnetic force.

Various types of magnetic adsorption devices of this type are known.
As shown in FIGS. 17 and 18, the magnetic adsorption device 10 disclosed in Patent Document 1 has the following structure.
That is, a ferromagnetic block 14 having two fixed permanent magnets 11 and 12 arranged obliquely opposite to each other, and having an attracting portion 13 that attracts a magnetic body, and an axis line in the lumen 15 of the ferromagnetic block 14. A permanent magnet assembly 16 rotatably mounted as a center. The permanent magnet assembly 16 is obtained by incorporating a permanent magnet 18 in the center of a rod-shaped magnetic member 17 and has an N pole portion and an S pole portion on both sides of the magnetic member. A handle 19 is attached to the permanent magnet assembly 16, and the handle 19 can be rotated within an angle range of 180 ° by operating the handle 19.

  In the magnetic attraction apparatus 10, when the handle 19 is rotated to the position shown in FIG. 17, the magnetic force of the fixed permanent magnets 11 and 12 is canceled by the magnetic force of the permanent magnet assembly 16, and the magnetic flux does not leak to the attracting portion 13. Therefore, the magnetic body (member to be attracted) is not attracted to the attracting portion 13. On the other hand, when the handle 19 is rotated to the position shown in FIG. 18, the magnetic flux from the fixed permanent magnets 11 and 12 and the permanent magnet assembly 16 leaks between the attracting portions 13. Adsorption is possible.

Special table 2002-518268 gazette

However, the magnetic adsorption device 10 has the following problems.
That is, when the permanent magnet assembly 16 is rotated by operating the handle 19, the repulsive force between the magnetic poles of the fixed permanent magnets 11 and 12 and the magnetic poles of the N pole portion and the S pole portion of the permanent magnet assembly 16 is large. The switching torque is large. For this reason, especially when a thin plate or a round bar is adsorbed, the handle at the time of switching to the adsorbed state is heavy, and depending on the thickness of the flat plate, the size of the steel pipe, and the thickness, there are cases where the adsorption cannot be switched. On the other hand, when the magnetic material is released, the handle may rotate suddenly and the handle may be damaged.
Accordingly, the present invention has been made to solve the above-mentioned problems, and the object of the present invention is to achieve a magnetic adsorption that has a small handle torque at the time of ON-OFF switching, a small handle rebound, and a good operability and feeling of operation. To provide an apparatus.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, the magnetic attraction apparatus according to the present invention is a magnetic circuit block having a lumen extending in one direction, and is divided into two magnetic pole members spaced in a direction around the lumen by a pair of spacers, A permanent magnet assembly having a magnetic circuit block in which a portion sandwiching one of the spacers is formed in an attracting portion, and an N-pole portion and an S-pole portion, and the lumen in the lumen of the magnetic circuit block Is arranged so as to be rotatable around the axis of the magnetic field, and is selectively rotatable to a first position and a second position spaced around the axis of the lumen so as to attract and release the magnetic substance in the attracting portion. The first position, which is a release position of the magnetic body , is provided so that the N pole portion and the S pole portion are on opposite sides of the spacer, and is the adsorption position of the magnetic body . Second place When it is rotated toward the N-pole portion of the other side across the spacer or the S pole portion of said spacer is formed in a shape crossing the said other spacer continuously or intermittently Rutotomoni, A permanent magnet assembly in which the S pole portion or the N pole portion on the side crossing the one spacer is formed in a shape that continuously or intermittently crosses the one spacer; and the permanent magnet assembly in the first position. The polarity of one of the magnetic poles of the permanent magnet assembly is fixed to one of the divided magnetic pole members of the magnetic circuit block on the side where one of the magnetic poles of the magnet assembly is located. Of the magnetic circuit block on the side where one fixed permanent magnet having a polarity opposite to that of the first magnetic pole and the other magnetic pole of the N pole portion and the S pole portion of the permanent magnet assembly in the first position are located Is And the other fixed permanent magnet fixed to the other magnetic pole member and having a polarity opposite to the polarity of the other magnetic pole of the permanent magnet assembly, and the N pole portion or the S on the side crossing the other spacer The pole portion extends in the axial direction of the permanent magnet assembly, and is formed at a position in the axial direction with a phase sequentially shifted in the circumferential direction of the permanent magnet assembly, and the S on the side crossing the one spacer. The pole portion or the N pole portion extends in the axial direction of the permanent magnet assembly, and is formed at a portion in the axial direction with a phase sequentially shifted in the circumferential direction of the permanent magnet assembly. The N pole portion and the S pole portion of the permanent magnet assembly at the position 1 are provided in a deviated manner on the other spacer side in the circumferential direction of the permanent magnet assembly .

According to a second aspect of the present invention, the N pole portion and the S pole portion of the permanent magnet assembly are fixed to the outer peripheral portion of the rod-shaped magnetic member, and the permanent magnet pieces having the N pole and S pole on the outer peripheral side are fixed. By this, it is formed in the N pole part and the S pole part.
Further, according to a third aspect of the present invention, there is provided a plurality of the permanent magnet pieces each serving as the N pole and the S pole, the outer periphery of the rod-shaped magnetic member being spaced apart in the axial direction of the rod-shaped magnetic member, and the rod-shaped The magnetic members are fixed to the circumferential direction of the magnetic member sequentially shifted in phase, and are formed at the N pole portion and the S pole portion, respectively.

According to a fourth aspect of the present invention, an angle formed between the center of the magnetic member and both end portions of the spacer is 20 °, and an angle formed between the center of the magnetic member and both end portions of each permanent magnet piece is 100 °. And each of the N-pole side and S-pole side permanent magnet pieces is fixed to the magnetic member with a phase shift of 20 ° in the circumferential direction of the magnetic member.
According to a fifth aspect of the present invention, each of the permanent magnet pieces has a spiral shape and is fixed to an outer peripheral portion of the rod-shaped magnetic member, and is formed at the N pole portion and the S pole portion, respectively. To do.

According to a sixth aspect of the present invention, in the permanent magnet assembly, a permanent magnet is mounted in a through-hole provided in a rod-shaped magnetic member, and the rod-shaped magnetic member is disposed on each of the outer peripheral portions of the magnetic members sandwiching the permanent magnet. Projections are formed at intervals in the axial direction of the magnetic member and sequentially shifted in the circumferential direction of the rod-shaped magnetic member, and the projections form the N pole part and the S pole part, respectively. It is characterized by that.
According to a seventh aspect of the present invention, in the permanent magnet assembly, a permanent magnet is mounted in a through hole provided in a rod-shaped magnetic member, and the outer periphery of the magnetic member on both sides sandwiching the permanent magnet has a spiral shape. A protrusion formed is formed, and the protrusion forms the N-pole part and the S-pole part, respectively.

ADVANTAGE OF THE INVENTION According to this invention, the handle | steering-wheel torque at the time of ON-OFF switching is small, the rebound of a handle | steering-wheel is small, and a magnetic adsorption apparatus with a sufficient operativity and operation feeling can be provided .

It is a perspective view of a magnetic adsorption device. It is a side view of a magnetic adsorption apparatus. It is a longitudinal cross-sectional view which shows the internal structure of a magnetic adsorption apparatus. It is a perspective view of a permanent magnet assembly. It is explanatory drawing which shows the attachment state of the permanent magnet piece in a permanent magnet assembly. It is a longitudinal cross-sectional view of the magnetic attraction | suction apparatus which shows the state which rotated the permanent magnet assembly 20 degrees from the release position of the magnetic body. It is a longitudinal cross-sectional view of the magnetic adsorption apparatus which shows the state which rotated the permanent magnet assembly 40 degrees from the release position of the magnetic body. It is a longitudinal cross-sectional view of the magnetic attraction | suction apparatus which shows the state which rotated the permanent magnet assembly 60 degrees from the release position of the magnetic body. It is a longitudinal cross-sectional view of the magnetic adsorption apparatus which shows the state which rotated the permanent magnet assembly 180 degrees from the release position of the magnetic body. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a perspective view which shows other embodiment of a permanent magnet assembly. It is a longitudinal cross-sectional view in the magnetic body release state of the conventional magnetic attraction apparatus. It is a longitudinal cross-sectional view in the magnetic body adsorption state of the conventional magnetic adsorption apparatus.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a perspective view of a permanent magnet type magnetic adsorption device, FIG. 2 is a side view thereof, FIG. 3 is a longitudinal sectional view showing the internal structure (hatching is omitted for easy understanding of the structure), and FIG. FIG. 5 is an explanatory view showing a mounting state of the permanent magnet piece in the permanent magnet assembly, and FIGS. 6 to 9 are positions of the permanent magnet piece and the spacer when the permanent magnet assembly is rotated. It is sectional drawing which shows a relationship.
The permanent magnet type magnetic adsorption device 20 includes a magnetic circuit block 24 having a lumen 22 extending in one direction, and a permanent magnet assembly 26 disposed in the lumen 22 so as to be rotatable about the axis of the lumen 22. And end plates 28 and 30 attached to one end and the other end of the magnetic circuit block 24, and a rod-shaped handle 32 coupled to one end of the permanent magnet assembly 26.

The lumen 22 penetrates the magnetic circuit block 24 in the longitudinal direction, and both end portions thereof are closed by end plates 28 and 30. The cross-sectional shape of the lumen 22 is circular.
The magnetic circuit block 24 is divided into two magnetic pole members 36 and 37 made of a magnetic material spaced apart in the circumferential direction of the inner cavity 22 by two spacers 34 and 35. The portions of the magnetic pole members 36 and 37 sandwiching one spacer 35 are the adsorbing portions 38 and 38 of the magnetic material (adsorbed body). The attracting portion may be an attracting portion (not shown) by attaching another member made of a magnetic material to the magnetic pole members 36 and 37.

Each of the spacers 34 and 35 is formed in a plate shape of a nonmagnetic material and is sandwiched between both magnetic pole members 36 and 37. The spacers 34 and 35 are fixed to the magnetic pole members 36 and 37 by welding or an adhesive.
In the magnetic circuit block 24, two plate-like fixed permanent magnets 40 and 41 are incorporated at a position facing the permanent magnet assembly 26 with the other spacer 34 interposed therebetween. The fixed permanent magnets 40 and 41 are made of a magnetic material having a large coercive force, such as a ferrite magnet or a rare earth magnet.

  One fixed permanent magnet 40 is magnetized in the thickness direction, and the side facing the permanent magnet assembly 26 is formed as an S pole and the opposite surface is formed as an N pole. The other fixed permanent magnet 41 is magnetized in the thickness direction. Contrary to the one fixed permanent magnet 40, the side facing the permanent magnet assembly 26 is formed as an N pole, and the opposite surface is formed as an S pole. Has been. The surface of one fixed permanent magnet 40 facing the permanent magnet assembly 26 is formed as an N pole, and the opposite surface is formed as an S pole, and the permanent magnet assembly 26 of the other fixed permanent magnet 41 is formed. The opposite surface may be formed as the S pole and the opposite surface as the N pole.

  The permanent magnet assembly 26 has an N pole portion and an S pole portion on the peripheral surface. The permanent magnet assembly 26 is disposed in the inner cavity 22 of the magnetic circuit block 24 so as to be rotatable about the axis of the inner cavity 22 as described above, and the magnetic body (adsorbed member) of the attracting portions 38 and 38 is arranged. In order to perform adsorption and release, they are selectively rotatable at a first position (position in FIG. 3) and a second position (position in FIG. 9) that are separated around the axis of the lumen 22.

The permanent magnet assembly 26 is provided in such a manner that the N pole part and the S pole part are on opposite sides of the spacers 34 and 35 in the first position (position in FIG. 3) as the release position of the magnetic substance. . In the example of FIG. 3, in the first position, the side facing the south pole of one fixed permanent magnet 40 is formed in the north pole portion, and the side facing the north pole of the other stationary permanent magnet 41 is formed in the south pole portion. ing. As a result, the magnetic flux from the other fixed permanent magnet 41 to the one fixed permanent magnet is canceled out, and no attracting force is generated in the attracting portions 38, 38.
That is, the polarity of the magnetic pole on the permanent magnet assembly 26 side is set to be opposite to the polarity of the magnetic poles of the opposed fixed permanent magnets 40 and 41 at the first position which is the release position of the magnetic body.

In the present embodiment, the permanent magnet assembly 26 is provided so that the N pole part and the S pole part are opposite to each other with the spacer interposed therebetween, as described above, in the first position, which is the release position of the magnetic substance. When the permanent magnet assembly 26 is rotated toward the second position (the position shown in FIG. 9), which is the magnetic material attracting position, the N pole portion on the side crossing the other spacer 34 of the spacers Alternatively, the S pole portion is formed in a shape that crosses the other spacer 34 continuously or intermittently.

In the embodiment according to FIGS. 3 to 9, the permanent magnet assembly 26 has a permanent magnet piece 44 fixed to the peripheral surface of a magnetic member 42 made of a rod-shaped magnetic material, and the N pole part and the S pole part. Is forming.
The permanent magnet piece 44 is formed of a magnet material having a large coercive force, such as a ferrite magnet or a rare earth magnet. Further, the permanent magnet piece 44 is formed in a circular arc shape in which the outer peripheral surface is an arc surface along the inner peripheral surface of the inner cavity 22 of the magnetic circuit block 24.
As shown in FIGS. 3 and 4, in the present embodiment, the permanent magnet piece 44 is an N-pole first magnet piece on the side facing the one fixed permanent magnet 40 in the first position A. Two permanent magnet pieces 44, 45 and an N-pole second magnet piece 46, are arranged at a slight interval in the axial direction of the magnetic member 42. In addition, at the first position, two permanent magnet pieces 44 of the S pole first magnet piece 47 and the S pole second magnet piece 48 are arranged on the side facing the other fixed permanent magnet 41 at the magnetic member 42. Are arranged at a slight interval in the axial direction.

  The N pole first and second magnet pieces 45 and 46 are magnetized in the thickness direction, the outer peripheral surface side is the N pole, the inner peripheral surface side is the S pole, and the inner peripheral surface side faces the magnetic member 42. It is fixed to the magnetic member 42 with an adhesive or the like. The S pole first and second magnet pieces 47 and 48 are magnetized in the thickness direction, the outer peripheral surface side is the S pole, the inner peripheral surface side is the N pole, and the inner peripheral surface side faces the magnetic member 42. It is fixed to the magnetic member 42 with an adhesive or the like.

  As shown in FIG. 4, the N-pole first magnet piece 45 and the N-pole second magnet piece 46 are arranged at a slight interval in the axial direction of the magnetic member 42 as described above, and the magnetic member 42. Are arranged with their phases shifted in the circumferential direction. Further, as clearly shown in FIGS. 3 and 5, both the magnet pieces 45 and 46 are provided on the peripheral surface of the magnetic member 42 so as to be deviated toward the other spacer 34.

The sizes of the spacers 34 and 35 and the magnet pieces and the phase shift angle are not particularly limited, but preferably, as shown in FIG. 5, the center of the magnetic member 42 and both end portions of the spacers 34 and 35 are used. Is set to 20 °, and the angle formed between the center of the magnetic member 42 and both ends of each of the first and second magnet pieces 45 and 46 is set to 100 °. The phase shift angle between the first and second magnet pieces 45 and 46 is set to 20 °.
The S-pole first and second magnet pieces 47 and 48 are arranged at the target positions with the N-pole first and second magnet pieces 45 and 46 on the opposite side of the outer periphery of the magnetic member 42. 45 and 46 are arranged with the same size and phase shift angle.

Further, in the first position, the end edge of the N-pole first magnet piece 45 is located in the immediate vicinity of the other spacer 34. The distance between the edge of the S pole second magnet piece 48 and the one spacer 35 is the distance between the center of the magnetic member 42, the edge of the S pole second magnet piece 48 , and the edge of the one spacer 35. It is open at a large interval so that the angle formed is about 40 °.

Next, the handle 32 is pivotally supported by the end of the magnetic member 42 at the portion protruding from the end plate 30 on the base side, and the base side end of the handle 32 is provided on the magnetic member 42 side. By being pressed from the inside by an urging member (not shown) having, the tip end side of the handle 32 is urged so as to abut against the end plate 30.
In the first position where the magnetic body (member to be attracted) is in an OFF state where the magnetic body (member to be attracted) cannot be attracted, the handle 32 is in the X position in FIG.

When the handle 32 is rotated to the second position where the magnetic body can be attracted to the ON state, the handle 32 falls into the groove 50 in the end plate 30 and is stably maintained. When the handle 32 is positioned in the groove 50, the stopper 52 is rotated, and the hook portion 53 at the tip thereof is locked to the handle 32, so that the handle 32 can be prevented from coming off from the groove 50, The state in which the magnetic material is adsorbed can be stably maintained, and safety can be achieved.
In FIG. 1, reference numeral 55 denotes a locking ring that locks a hook portion or the like when suspended by a crane or the like. Reference numeral 56 denotes a guard that protects the end plates 28 and 30 of the magnetic adsorption device 20 from external impacts. The guard 56 can also be used as a handle when the magnetic attraction apparatus 20 is set on a magnetic body (member to be attracted).

Next, the magnetic body adsorption operation (switching between ON and OFF) in the present embodiment will be described with reference to FIGS.
FIG. 3 shows a state in which the magnetic adsorption device 20 is OFF as described above. That is, the polarities on the fixed permanent magnets 40 and 41 side and the polarities on the permanent magnet side of the permanent magnet assembly 26 cancel each other, and the magnetic attracting device 20 is turned off.
As shown in FIG. 6, when the permanent magnet assembly 26 is rotated 20 ° in the counterclockwise direction by rotating the handle 32, the N pole first magnet 45 exceeds the other spacer 34 and has the same polarity on the opposite side. The positional relationship starts to move to the magnetic pole member 37 side of (N pole). The N-pole second magnet 46 remains in the range of the first magnetic pole member 36. As a result, cancellation of the polarity on the fixed permanent magnet 41 side and the polarity on the permanent magnet side of the permanent magnet assembly 26 is reduced, and the magnetic flux begins to leak to the attracting portions 38 and 38. Adsorption power begins to occur. In addition, when the N pole first magnet 45 crosses the other spacer 34 and moves to the magnetic pole member 37 side on the same pole (N pole) side, it receives a repulsive force, but the N pole portion has the N pole first and first poles. Since it is divided into two magnets 45 and 46 and is out of phase, the repulsive force is small and the rotational torque received by the handle 32 is small.

As shown in FIG. 7, when the permanent magnet assembly 26 is rotated by 40 ° in the counterclockwise direction, the N pole first magnet 45 is further inserted into the same pole (N pole) magnetic pole member 37 by an angle range of 20 °. And the N-pole second magnet 46 starts to move toward the same-polarity (N-pole) magnetic pole member 37 side beyond the other spacer 34. At this time, the S pole first and second magnets 47 and 48 are still in the first magnetic pole member 37. As a result, the cancellation between the polarity on the fixed permanent magnet 41 side and the polarity on the permanent magnet side of the permanent magnet assembly 26 is further reduced, and the attracting force at the attracting portions 38 and 38 is increased. Also in this case, since the N-pole first magnet 45 and the N-pole second magnet 46 sequentially move into the magnetic pole member 37 on the same pole (N-pole) side, the rotational torque received by the handle 32 only increases sequentially, and the handle The operation is easy.

As shown in FIG. 8, when the permanent magnet assembly 26 is rotated 60 ° in the counterclockwise direction, the N pole first and second magnets 45 and 46 are further placed in the same pole (N pole) magnetic pole member 37. The S pole second magnet 48 crosses the one spacer 35 and starts to move into the opposite side (S pole) magnetic pole member 36. Thereby, the cancellation between the polarity on the fixed permanent magnet 41 side and the polarity on the permanent magnet side of the permanent magnet assembly 26 is further reduced, and the attracting force at the attracting portions 38 and 38 is further increased. Also in this case, the rotational torque received by the handle 32 only increases sequentially, and the handle 32 can be operated easily.

  As shown in FIG. 9, when the permanent magnet assembly 26 is rotated 180 ° in the counterclockwise direction, the N pole first and second magnets 45 and 46 are all in the same pole (N pole) magnetic pole member 37. Further, the S pole first magnet 47 and the S pole second magnet 48 are all moved into the magnetic pole member 36 on the opposite side (S pole). As a result, in the attracting portions 38 and 38, the attracting force from the fixed permanent magnets 41 and 40 side is affected by the N pole first and second magnets 45 and 46, and the S pole first and second magnets 47 and 48 side. Attraction force is applied, and the magnetic adsorption device 20 is completely turned on. In this case, the operation of the handle 32 can be easily performed. At this position, the handle 32 falls into the groove 50, and the hook portion 43 of the stopper 52 is locked to the handle 32, so that the adsorption of the magnetic body (member to be attracted) is safely maintained.

As described above, in the present embodiment, the N pole first and second magnets 45 and 46 and the S pole first and second magnets 47 and 48 are displaced toward the other spacer 34 on the magnetic member 42. It is arranged. Further, the N-pole first magnet 45 and the N-pole second magnet 46 are arranged out of phase with each other in the circumferential direction of the magnetic member 42, and the S-pole first magnet 47 and the S-pole second magnet 48 are also mutually magnetic. The phase is shifted in the circumferential direction. As a result, the movable magnets, that is, the N-pole first magnet 45 and the N-pole second magnet 46 cross the other spacer 34 sequentially with a time shift. For this reason, as compared with the case where the movable magnet crosses the other spacer 34 at the same time, the repulsive force acting on the movable magnet is dispersed, the rotational torque received by the handle 32 is dispersed small, and the handle operation is facilitated.

In order to release the adsorption of the magnetic material (turn off the magnetic adsorption device), the handle 32 (permanent magnet assembly 26) may be rotated in the opposite direction.
Also in this case, since the force acting on the handle 32 (permanent magnet assembly 26) is sequentially reduced, sudden rotation when the handle 32 returns from ON to OFF is also suppressed, and a hand is caught or the handle 32 is damaged. Can solve the problem.
In this way, the difference in torque depending on the rotation angle of the handle 32 becomes small regardless of whether the magnetic material is attracted or not, so that the feel of the operation of the handle 32 is very smooth and excellent. be able to.

Next, FIG. 10 is a perspective view showing another embodiment of the permanent magnet assembly 26.
In the present embodiment, three permanent magnet pieces 44 are provided in each of the N pole part and the S pole part. Also in this case, the same effect as described above can be obtained.
FIG. 11 is a perspective view showing still another embodiment of the permanent magnet assembly 26. The permanent magnet assembly 26 of the present embodiment is provided with five permanent magnet pieces 44 each having an N pole portion and an S pole portion. Moreover, the permanent magnet piece 44 group of the N pole part and the S pole part is provided over the entire half-circumferential part without being particularly displaced toward the other spacer 34 side. Also in this case, the rotational torque of the handle 32 can be reduced. Note that the rotation angle of the handle 32 from ON to OFF increases.

  FIG. 12 is a perspective view showing still another embodiment of the permanent magnet assembly 26. In the permanent magnet assembly 26 of the present embodiment, the permanent magnet pieces 44 of the N-pole part and the S-pole part are not provided as individual pieces but are provided in a continuous spiral shape over almost half of the circumference of the magnetic member 42. In the present embodiment, the processing of the permanent magnet piece 44 is troublesome, but the rotational torque applied to the handle 32 can be continuously changed.

13 to 15 are perspective views showing still another embodiment of the permanent magnet assembly 26.
In the embodiment of the permanent magnet assembly 26 shown in FIGS. 13 to 15, a through hole 60 that penetrates to the opposite peripheral surface is provided on the peripheral surface of the rod-like columnar magnetic member 43. A plate-like permanent magnet 62 is inserted therein and fixed with an adhesive or the like. The permanent magnet 62 is magnetized in the thickness direction. And the peripheral surface of the magnetic member 43 is processed and the protrusion 64 of required shape is formed. This protrusion 64 becomes an N pole part and an S pole part.

In the permanent magnet assembly 26 shown in FIG. 13, the protrusions 64 are formed in four blocks in each area deviated toward the other spacer 34. Each block-like protrusion is provided with a phase shifted in the circumferential direction of the magnetic member 43. In the present embodiment as well, the rotational torque of the handle 32 can be reduced and the operation of the handle can be facilitated as in the above embodiments.
In the permanent magnet assembly 26 shown in FIG. 14, the protrusion 64 is formed in five blocks. Each block is provided with a phase shift in the circumferential direction in an area covering almost half of the circumference of the magnetic member 43. Similarly in this embodiment, the handle operation is easy.

  In the permanent magnet assembly 26 shown in FIG. 15, the protrusions 64 are formed in the protrusions 64 that are substantially spirally continuous in each area that is displaced from the other spacer 34. Further, in the permanent magnet assembly 26 shown in FIG. 16, the protrusions 64 are formed in the protrusions 64 that are substantially spirally continuous in an area covering each half circumference of the magnetic member 43. In the embodiment shown in FIG. 15 and FIG. 16, the operability of the handle can be improved as described above.

  In each of the above-described embodiments, the magnetic attraction apparatus 20 in which the fixed permanent magnets 40 and 41 are disposed in the magnetic circuit block 24 is shown. However, a magnetic attraction apparatus without the fixed permanent magnets 40 and 41 can be provided (not shown). Also in this case, the permanent magnet assembly 26 is configured in the same manner as in the above embodiments. In this case, since no fixed permanent magnet is disposed in the magnetic circuit block 24, the permanent magnet piece or permanent magnet disposed in the permanent magnet assembly 26 has a sufficient magnetic force to attract and hold the magnetic body. It is necessary to use a piece or a permanent magnet.

In each of the above embodiments, in the permanent magnet assembly 26, the N pole part and the S pole part are formed in a shape that extends in the axial direction and is sequentially displaced in the circumferential direction in the axial direction. In short, when the permanent magnet assembly 26 is rotated toward the second position, which is the magnetic material adsorption position, the N pole portion on the side crossing the other spacer 34 of the spacers or the like. The S pole part should just be formed in the shape which crosses the other spacer 34 continuously or intermittently.

  20 Magnetic adsorption device, 22 Lumen, 24 Magnetic circuit block, 26 Permanent magnet assembly, 28 End plate, 30 End plate, 32 Handle, 34 Other spacer, 35 One spacer, 36 Magnetic pole member, 38 Adsorption part, 40 Fixed permanent magnet, 41 Fixed permanent magnet, 42 Magnetic member, 43 Magnetic member, 44 Permanent magnet piece, 45 N pole first magnet, 46 N pole second magnet, 47 S pole first magnet, 48 S pole second magnet, 50 groove, 52 stopper, 53 hook part, 55 suspension ring, 56 guard, 60 through-hole, 62 permanent magnet, 64 protrusion

Claims (7)

A magnetic circuit block having a lumen extending in one direction, divided into two magnetic pole members spaced in a direction around the lumen by a pair of spacers, and a portion sandwiching one of the spacers A magnetic circuit block formed on the attracting portion;
A permanent magnet assembly having an N-pole portion and an S-pole portion, which is disposed in the lumen of the magnetic circuit block so as to be rotatable about the axis of the lumen, and attracts and releases the magnetic substance in the attracting portion. in the first position and selectively rotatably disposed in the second position, the release position serving said first position of said magnetic body spaced around the axis of the lumen in order to perform, the N-pole portion and The side that crosses the other spacer of the spacers when the S pole is rotated toward the second position, which is an adsorption position of the magnetic body, so that the S pole is positioned opposite to the spacer. the N-pole portion or the S pole portion of the formed in a shape crossing the other spacer continuously or intermittently Rutotomoni, the S-pole portion or the N-pole portion of the side crossing said one spacer, The one spacer A permanent magnet assembly which is formed in a shape crossing the connection or intermittently,
The permanent magnet is fixed to one of the divided magnetic pole members of the magnetic circuit block on the side where one of the magnetic poles of the N pole part and S pole part of the permanent magnet assembly at the first position is located. One fixed permanent magnet having a polarity opposite to the polarity of one magnetic pole of the assembly;
The permanent magnet is fixed to the other divided magnetic pole member of the magnetic circuit block on the side where the other magnetic pole of the N pole part and the S pole part of the permanent magnet assembly in the first position is located. The other fixed permanent magnet having a polarity opposite to the polarity of the other magnetic pole of the assembly,
The N pole part or the S pole part on the side crossing the other spacer extends in the axial direction of the permanent magnet assembly, and sequentially shifts the phase in the circumferential direction of the permanent magnet assembly at the axial part. Formed by shifting,
The S pole portion or the N pole portion on the side crossing the one spacer extends in the axial direction of the permanent magnet assembly, and sequentially shifts the phase in the circumferential direction of the permanent magnet assembly at the axial portion. It is formed by shifting,
The N pole portion and the S pole portion of the permanent magnet assembly at the first position are provided to be deviated to the other spacer side in the circumferential direction of the permanent magnet assembly, respectively. Magnetic adsorption device. The N-pole portion and the S-pole portion of the permanent magnet assembly, the outer periphery of the rod-shaped magnetic member, the Rukoto permanent magnet pieces outer circumferential side is an N pole and S pole, respectively is fixed, the N-pole portion The magnetic attraction apparatus according to claim 1 , wherein the magnetic attraction apparatus is formed at the S pole portion. A plurality of the permanent magnet pieces each serving as the N-pole and the S-pole are provided on the outer periphery of the rod-shaped magnetic member, spaced in the axial direction of the rod-shaped magnetic member, and in the circumferential direction of the rod-shaped magnetic member. The magnetic attraction apparatus according to claim 2, wherein the magnetic attraction apparatus is fixed to each of the N pole part and the S pole part by being sequentially shifted in phase. The angle between the center of the magnetic member and both ends of the spacer is 20 °, the angle between the center of the magnetic member and both ends of each permanent magnet piece is 100 °, and the N pole side and The magnetic attraction apparatus according to claim 3 , wherein each of the permanent magnet pieces on the S pole side is fixed to the magnetic member with a phase shifted by 20 ° in the circumferential direction of the magnetic member. 3. The magnetism according to claim 2, wherein each of the permanent magnet pieces has a spiral shape and is fixed to an outer peripheral portion of the rod-shaped magnetic member, and is formed in the N pole portion and the S pole portion, respectively. Adsorption device. In the permanent magnet assembly, permanent magnets are mounted in through-holes provided in a bar-shaped magnetic member, and the outer peripheral portions of the magnetic members on both sides sandwiching the permanent magnet are spaced apart in the axial direction of the bar-shaped magnetic member, respectively. at a, and the rod-shaped made are projections formed by sequentially shifting the phase in the circumferential direction of the magnetic member, projecting portion, characterized in that each forming the N-pole portion and the S-pole portion claims The magnetic adsorption apparatus according to 1 . In the permanent magnet assembly, a permanent magnet is mounted in a through-hole provided in a rod-shaped magnetic member, and spiral protrusions are formed on the outer peripheral portions of the magnetic members on both sides of the permanent magnet. The magnetic attraction apparatus according to claim 1, wherein the protrusions respectively form the N pole part and the S pole part.

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