JP2014165993A - Movement mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly move a mobile with a little energy in spite of an extremely simple structure.SOLUTION: A movement mechanism comprises: a base plate 1; a pair of non-magnetic opposing walls 2 which are fixed on the base plate 1 and disposed on a surface of the base plate 1 while facing each other at a predetermined interval therebetween, and including a transfer gap 5 of a predetermined width; a mobile 3 disposed in the transfer gap 5 of the opposing walls 2 in a freely movable manner and formed from a permanent magnet with opposing surfaces at both sides opposing the pair of opposing walls 2 as different magnetic poles; and a plurality of attraction magnets 4 disposed along the opposing walls 2 outside of the opposing walls 2 and formed from permanent magnets with surfaces opposing the mobile 3 as magnetic poles different from magnetic poles of the mobile 3. A pair of attraction magnets 4 disposed at both sides of the mobile 3 balance and attract the mobile 3, and move the mobile 3 which moves in the transfer gap 5 between the opposing walls 2, in a magnetic float state in the transfer gap 5 inside of the opposing walls 2.

Description

  The present invention relates to a moving mechanism that can smoothly move a moving body using a magnetic attraction force of a permanent magnet, and in particular, it is used for a conveyor or the like, and is an optimal moving mechanism for moving a conveyed product with less energy. About.

  It is important for the conveyor to efficiently transport the conveyed product with small energy. In order to realize this, a conveyor that moves a conveyed product by utilizing the repulsive force of a magnet has been developed. (See Patent Documents 1 and 2)

  Patent Document 1 describes a belt conveyor that attracts and lifts a belt with a magnet, and Patent Document 2 describes a conveyor that efficiently circulates steps with low power consumption by using induced repulsion.

Japanese Patent Laid-Open No. 11-322037 JP 2009-35355 A

  The above publications describe a mechanism for smoothly moving a moving body with a magnetic attractive force or a repulsive force. However, the conveyors described in these publications consume a considerable amount of energy to drive the belt because the conveyed product is transported on the belt. For this reason, there exists a fault which cannot transfer efficiently only a mobile body with small energy by simple structure.

  The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide a moving mechanism that can move a moving body smoothly with small energy while having a very simple structure.

Means for Solving the Problems and Effects of the Invention

The moving mechanism of the present invention has the following configuration in order to achieve the above-described object.
The moving mechanism is a pair of non-magnetic materials that are fixed to the base plate 1 and are opposed to each other at a predetermined interval on the surface of the base plate 1 and provided with a transfer gap 5 having a predetermined width. A movable body 3 composed of permanent magnets that are movably disposed in the transfer gap 5 of the opposed wall 2 and that have opposed surfaces on both sides facing the pair of opposed walls 2 as different magnetic poles, and the opposed wall And a plurality of attracting magnets 4 made of permanent magnets that are arranged along the opposing wall 2 on the outer side of 2 and have a surface facing the moving body 3 as a magnetic pole different from the magnetic pole of the moving body 3. The pair of attracting magnets 4 arranged on both sides of the moving body 3 attracts the moving body 3 in a balanced manner, and moves the moving body 3 that moves in the transfer gap 5 between the facing walls 2 to the inside of the facing wall 2. The transfer gap 5 is moved in a magnetic float state.

  The above moving mechanism is characterized by being able to move the moving body smoothly with small energy while having an extremely simple structure. This is because the above moving mechanism attracts both sides of the moving body while balancing with the attracting magnet and moves the inside of the opposing wall in a magnetic float state. The moving body that is balanced by the attracting magnet and attracted from both sides can reduce the frictional resistance in a floating state or by contacting the base plate with a pressure smaller than a substantial weight.

It is a perspective view of the moving mechanism concerning one example of the present invention. It is a top view of the moving mechanism shown in FIG. It is a side view of the moving mechanism shown in FIG. It is the IV-IV sectional view taken on the line of the moving mechanism shown in FIG. It is a vertical longitudinal cross-sectional view of the moving mechanism which concerns on the other Example of this invention. FIG. 6 is a sectional view taken along line VI-VI of the moving mechanism shown in FIG. 5. It is a horizontal sectional view of a moving mechanism according to another embodiment of the present invention. It is the VIII-VIII sectional view taken on the line of the moving mechanism shown in FIG. It is a vertical cross-sectional view of a moving mechanism according to another embodiment of the present invention. It is a schematic plan view of the moving mechanism which concerns on the other Example of this invention. It is a figure which shows the principle of operation of the drive mechanism of the moving mechanism shown in FIG. It is a figure which shows the principle of operation of the drive mechanism of the moving mechanism shown in FIG. It is a schematic plan view of the moving mechanism which concerns on the other Example of this invention. FIG. 14 is an end view taken along line XIV-XIV of the moving mechanism illustrated in FIG. 13.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a moving mechanism for embodying the technical idea of the present invention, and the present invention does not specify the moving mechanism as follows. Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The moving mechanism shown in the perspective view of FIG. 1, the plan view of FIG. 2, the side view of FIG. 3, and the cross-sectional view of FIG. 4 includes a planar base plate 1 and a surface of the base plate 1 at a predetermined interval. A pair of opposing walls 2 that are arranged to face each other and that are provided with a transfer gap 5 therebetween, a moving body 3 that is movably arranged in the transfer gap 5 of the opposing wall 2, and an outside of the opposing wall 2 And a plurality of attracting magnets 4 arranged along the opposing wall 2.

  The base plate 1 has a flat upper surface and moves the moving body 3 along the upper surface. The base plate 1 is made of a non-magnetic material such as plastic or non-magnetic metal so as not to affect the attractive force of the moving magnet 3 and the permanent magnet of the attracting magnet 4. The base plate 1 arranges the upper surface in a horizontal plane and moves the moving body 3 in the horizontal direction. However, in the moving mechanism that moves the moving body in the inclined plane, the base plate is inclined. A moving mechanism that moves the moving body 3 in a non-contact state in a magnetic float state can reduce the frictional resistance between the moving body 3 and the base plate 1 to zero. The moving body 3 is attracted to the attracting magnet 4 and moved in a magnetic float state. However, if the moving body 3 is heavy or has a weak magnetic attraction force, the moving body 3 moves while contacting the surface of the base plate 1. To do. Even in this state, the contact pressure at which the movable body 3 contacts the base plate 1 is lighter than the weight of the movable body 3. Therefore, the frictional resistance between the moving body 3 and the base plate 1 is smaller than that in a state where the moving magnet 3 is not attracted by the attracting magnet 4. This is because the frictional resistance increases in proportion to the contact pressure between the moving body 3 and the base plate 1.

  As shown in FIGS. 5 and 6, the moving mechanism in which the moving body 3 moves while contacting the surface of the base plate 1 includes a guide roll 6 that smoothly moves the moving body 3 on the surface of the base plate 1. This moving mechanism can move smoothly while maintaining a horizontal posture in a state where the moving body 3 is always in contact with two or more guide rolls 6. The base plate 1 can smoothly move the moving body 3 by applying a low friction coating such as a fluororesin having a low frictional resistance to the contact surface of the moving body 3.

  The facing wall 2 is a guide that moves the moving body 3 while guiding it to the transfer gap 5. The opposing wall 2 is made of a material that does not magnetically shield between the moving body 3 and the attracting magnet 4, in other words, a material that does not affect the magnetic flux of the permanent magnet of the moving body 3 and the attracting magnet 4. The facing wall 2 shown in the above figure is a plate made of a non-magnetic material such as plastic or non-magnetic metal, and has an inner width slightly larger than the outer width of the moving body 3 to face the moving body 3. For example, a gap of 0.2 mm or more and 5 mm or less, preferably 0.5 mm or more and 3 mm or less, more preferably 0.5 mm or more and 2 mm or less is provided between the wall 2 and the wall 2. The moving mechanism for moving the moving body 3 linearly arranges the opposing walls 2 linearly at regular intervals, and makes the transfer gap 5 linear. However, the moving mechanism of the present invention does not necessarily move the moving body in a straight line, and can also move the moving body between a curved path and a straight path. Since the opposing wall 2 forms the transfer gap 5, the opposing wall 2 is disposed to face the transfer gap 5 for moving the moving body 3.

  The moving body 3 that moves in the transfer gap 5 contacts the surface of the opposing wall 2. However, the contact pressure for bringing the moving body 3 into contact with the surface of the opposing wall 2 can be lowered by balancing the both sides of the moving body 3 and moving the attracting magnet 4 to attract the moving body 3. Therefore, the frictional resistance between the moving body 3 and the opposing wall 2 is small, and the moving body 3 moves smoothly through the transfer gap 5. In the moving mechanism shown in FIGS. 7 and 8, guide rolls 7 are arranged on the opposing wall 2 at a predetermined interval in order to move the moving body 3 more smoothly. The guide roll 7 is connected to the base plate 1 so as to be able to rotate, and smoothly moves the moving body 3 in contact with the surface. The moving mechanism can move the moving body 3 more smoothly by arranging the guide roll 7 so that the moving body 3 is always in contact with two or more guide rolls 7.

  The moving body 3 is a rectangular permanent magnet. The moving body 3 is attracted to the attracting magnet 4 disposed outside the opposing wall 2 with a magnetic attracting force so that the moving body 3 is attracted by the attracting magnets 4 on both sides and can move in the transfer gap 5 in a magnetic float state. Therefore, the permanent magnet of the moving body 3 has different magnetic poles on both sides facing the opposing wall 2.

  The attracting magnet 4 is also a permanent magnet, and the surface facing the moving body 3 is a magnetic pole different from the magnetic pole of the moving body 3, and the moving body 3 is balanced and attracted from both sides by a magnetic attraction force. The moving mechanism shown in the plan view of FIG. 2 is arranged side by side on the outside of the opposing wall 2 so that the attracting magnet 4 is inclined at a predetermined angle with respect to the opposing wall 2. The attraction magnet 4 fixed to the base plate 1 in an inclined posture has an inclination angle (α) with respect to the opposing wall 2 of, for example, greater than 0 degrees and less than 45 degrees, preferably greater than 5 degrees and greater than 40 degrees. Also, it is preferably about 30 degrees. The attracting magnet 4 disposed to be inclined with respect to the opposing wall 2 can move the moving body 3 more smoothly in the direction indicated by the arrow A in FIG. However, it goes without saying that the attracting magnet can be arranged in a posture not inclined with respect to the opposing wall.

  The moving mechanism arranges a plurality of attracting magnets 4 along the opposing wall 2 outside the opposing wall 2. The moving mechanism shown in FIGS. 1 to 3 has a predetermined gap between adjacent attracting magnets 4. This moving mechanism can smoothly move the moving body 3 by setting the length (L) of the moving body 3 to 1.5 times or more the center distance (d) of the adjacent attracting magnets 4. Further, there is a feature that the number of attracting magnets 4 to be used can be reduced by widening the interval (d) of the attracting magnets 4.

  In the moving mechanism of FIG. 9, the yoke 8 is arranged outside the pair of attracting magnets 4 arranged outside the facing wall 2. The yoke 8 is a ferromagnetic body such as a silicon steel plate, and both ends thereof are connected to a pair of attracting magnets 4 arranged outside the opposing wall 2 so that the magnetic circuit of the attracting magnet 4 and the moving body 3 is a closed loop. This moving mechanism reduces the magnetic resistance outside the attracting magnet 4 with the yoke 8 and increases the attracting force by which the attracting magnet 4 attracts the moving body 3 so that the moving body 3 can be smoothly moved in a more preferable magnetic float state. Can move to.

  Furthermore, the moving mechanism of FIG. 10 is provided with a driving mechanism 10 that moves the moving body 3 along the transfer gap 5 of the opposing wall 2. The drive mechanism 10 attracts the moving body 3 and repels and accelerates it. The position sensor 12 detects the position of the moving body 3. The position sensor 12 detects the position of the moving body 3. A control circuit 13 for controlling the direction and magnitude of the current of the exciting coil 11 is provided.

  The driving mechanism 10 accelerates the moving body 3 by controlling the current of the exciting coil 11 by the control circuit 13 at the position of the moving body 3 detected by the position sensor 12. 11 and 12 show a state in which the moving body 3 is accelerated by the magnetic field of the exciting coil 11. FIG. 11 shows a state where the moving body 3 is attracted and accelerated by the magnetic field of the exciting coil 11. When the moving body 3 moves to a position approaching the exciting coil 11, the position sensor 12 detects the position of the moving body 3, and the control circuit 13 uses the magnetic pole on the surface of the exciting coil 11 facing the moving body 3 as the moving body 3. As a magnetic pole different from the magnetic pole, the moving body 3 is attracted and accelerated by the magnetic attraction force of the exciting coil 11 and the moving body 3. FIG. 12 shows a state in which the moving body 3 is repelled and accelerated by the magnetic field of the exciting coil 11. When the moving body 3 moves to a position passing through the exciting coil 11, the position sensor 12 detects the position of the moving body 3, and the control circuit 13 uses the magnetic pole on the surface of the exciting coil 11 facing the moving body 3 as the moving body 3. The moving body 3 is repelled and accelerated by the magnetic repulsive force between the exciting coil 11 and the moving body 3 as the same magnetic pole.

  The control circuit 13 controls the direction and magnitude of the current flowing through the exciting coil 11 with a signal from the position sensor 12. Therefore, the position sensor 12 detects the position of the moving body 3 that can be accelerated by attracting the moving body 3 with the exciting coil 11, and the position of the moving body 3 that can be repelled and accelerated, and the position signal of the moving body 3 is controlled by the control circuit. 13 is output. The position sensor 12 detects the position of the moving body 3 with a magnetic sensor or an optical sensor.

  The above drive mechanism 10 attracts the moving body 3 by the magnetic field of the excitation coil 11 and repels and accelerates it, but the drive mechanism attracts and accelerates the repulsive body by the magnetic field of the excitation coil without repelling, or It can be repelled and accelerated without suction.

  A moving mechanism including a driving mechanism 10 for accelerating the moving body 3 arranges the excitation coil 11 at a predetermined interval between the attracting magnets 4 and accelerates the moving body 3 in the transfer direction. Therefore, this moving mechanism has a feature that the moving body 3 can be quickly transferred without being decelerated by the long transfer gap 5. However, the moving mechanism of the present invention does not necessarily need to be provided with a driving mechanism. This is because the deceleration of the moving body 3 supplied to the transfer gap 5 at a predetermined speed can be reduced to move smoothly.

  Further, in the moving mechanism shown in FIGS. 13 and 14, the planar shape of the pair of opposing walls 2 provided on the surface of the planar base plate 1 is circular. The pair of opposing walls 2 that are circular includes an outer wall 2A provided on the outer side and an inner wall 2B provided on the inner side, and a ring-shaped transfer gap 5 is provided between the inner wall 2B and the outer wall 2A. The inner wall 2B and the outer wall 2A having a circular planar shape are concentric, and the distance between the inner wall 2B and the outer wall 2A is constant. The pair of opposing walls 2 is configured such that the distance between the inner wall 2B and the outer wall 2A is slightly larger than the outer width of the moving body 3 so that the moving body 3 can move smoothly.

  The moving body 3 has a shape that allows the ring-shaped transfer gap 5 to move smoothly, and has a shape that sets the gap between the opposing facing wall 2 to a predetermined interval. Since the opposing wall 2 shown in FIG. 13 is circular, the opposing surface of the moving body 3 that moves along the outer wall 2A and the inner wall 2B, which are curved surfaces, is also a curved surface. That is, the outer peripheral surface of the movable body 3 is a curved surface along the inner peripheral surface of the outer wall 2A, and the inner peripheral surface of the movable body 3 is a curved surface along the outer peripheral surface of the inner wall 2B. As described above, the moving body 3 having the outer peripheral surface and the inner peripheral surface as curved surfaces can be arranged in a state of being closer to the opposing surfaces of the outer wall 2A and the inner wall 2B. Can increase the magnetic attractive force. However, in the structure in which the radius of the inner wall and the outer wall is sufficiently large with respect to the length of the moving body, the planar shape of the moving body can be made substantially rectangular.

  The moving mechanism shown in the figure includes a plurality of moving bodies 3, and these moving bodies 3 are arranged along a circular opposing wall 2. The plurality of moving bodies 3 arranged in the ring-shaped transfer gap 5 are connected at a predetermined interval via a connecting member 15. The connecting member 15 shown in the figure includes a plurality of connecting arms 16 extending radially from the center of the circular opposing wall 2, and the rear ends of these connecting arms 16 are connected by the central connecting portion 17 at the center of the opposing wall 2. In addition, the movable body 3 is fixed to the tip of each connecting arm 16. The connecting member 15 is connected to the central connecting portion 17 so that the lengths of the plurality of connecting arms 16 are equal and the central angles between the adjacent connecting arms 16 are equal, so that the plurality of moving bodies 3 are equally spaced. It is arranged. The connecting member 15 that arranges the plurality of moving bodies 3 at equal intervals with the lengths and the central angles of the plurality of connecting arms 16 being equal can be supported in a balanced manner with the central connecting portion 17 as the center of gravity. In particular, the transfer gap 5 can be smoothly moved while the plurality of moving bodies 3 are attracted to the attracting magnets 4 on both sides to bring them into a magnetic float state. Further, the moving mechanism can reduce the frictional resistance with the moving body by arranging the guide roll on the surface of the base plate or arranging the guide roll on the inner surface of the opposing wall.

  The moving mechanism shown in FIG. 13 includes three moving bodies 3, and these moving bodies 3 are arranged at equal intervals via the connecting member 15. The connecting member 15 shown in the figure includes three connecting arms 15 that are connected in a radial pattern, and the center angle of these connecting arms 15 is made equal to fix the movable body 3 to the tip. Thus, the moving mechanism which arranges the three moving bodies 3 at equal intervals via the connecting member 15 can move smoothly while supporting the plurality of moving bodies 3 in a balanced manner. However, the moving mechanism can have two or less moving bodies or four or more moving bodies. The moving mechanism having four or more moving bodies can move smoothly while arranging a plurality of moving bodies at equal intervals and supporting them in a balanced manner.

  Furthermore, the moving mechanism of FIG. 13 arranges a plurality of attracting magnets 4 along the outer side of the outer wall 2A and the inner side of the inner wall 2B. The attracting magnets 4 disposed on the outer side of the outer wall 2A and the inner side of the inner wall 2B are disposed on both sides of the opposing wall 2 and at positions facing each other. These attracting magnets 4 have a surface facing the moving body 3 as a magnetic pole different from the magnetic pole of the moving body 3 in the same manner as the moving mechanism described above. Furthermore, the moving mechanism shown in the plan view of FIG. 13 is arranged side by side on both sides of the opposing wall 2 so that the attracting magnet 4 is inclined at a predetermined inclination angle (α) with respect to the tangential direction of the opposing wall 2. . However, the attracting magnet can be arranged in a posture not inclined with respect to the opposing wall.

  Further, the moving mechanism shown in the figure also includes a drive mechanism 10 that moves the moving body 3 along the transfer gap 5 of the opposing wall 2. As in the drive mechanism described above, the drive mechanism 10 includes an exciting coil 11 that attracts and repels the moving body 3, a position sensor 12 that detects the position of the moving body 3, and a position sensor 12. A control circuit 13 that detects the position of the moving body 3 and controls the direction and magnitude of the current of the exciting coil 11 is provided. The driving mechanism 10 accelerates the moving body 3 by controlling the current of the exciting coil 11 by the control circuit 13 at the position of the moving body 3 detected by the position sensor 12. The control circuit 13 controls the direction and magnitude of the current flowing through the exciting coil 11 with a signal from the position sensor 12.

  In this drive mechanism 10, when the moving body 3 moves to a position approaching the excitation coil 11, the position sensor 12 detects the position of the moving body 3, and the control circuit 13 energizes the excitation coil 11, The moving body 3 is attracted and accelerated by the magnetic attraction force of the exciting coil 11 and the moving body 3 by using the magnetic pole of the opposite surface as a magnetic pole different from the magnetic pole of the moving body 3. When the moving body 3 moves to a position that passes through the excitation coil 11, the position sensor 12 detects the position of the moving body 3, and the control circuit 13 energizes the excitation coil 11, The magnetic pole is the same as the magnetic pole of the moving body 3, and the moving body 3 is repelled and accelerated by the magnetic repulsive force between the exciting coil 11 and the moving body 3.

  In the drive mechanism 10 described above, a plurality of sets of exciting coils 11 are arranged along the outer side of the outer wall 2A and the inner side of the inner wall 2B. The exciting coils 11 arranged on the outer side of the outer wall 2A and on the inner side of the inner wall 2B are arranged on both sides of the opposing wall 2 at positions facing each other. The drive mechanism 10 shown in the figure includes three sets of exciting coils 11, and these exciting coils 3 are arranged at equal intervals. With this structure, the three exciting coils 11 of the drive mechanism 10 can coincide with the timing at which the three moving bodies 3 arranged at equal intervals are accelerated by magnetic force. For this reason, the plurality of moving bodies 3 can be transported in a balanced and stable manner along the transport gap 5. However, the excitation coils of the drive mechanism do not necessarily have to be arranged at equal intervals facing the plurality of moving bodies, and a plurality of sets of excitation coils can be arranged at different intervals. In the moving mechanism of this structure, any one of the plurality of sets of exciting coils accelerates any moving body of the plurality of moving bodies at different timings. The moving body is constantly accelerated, continuously driven and continuously rotated.

  Furthermore, although not shown, the number of exciting coils arranged along the opposing wall may be different from the number of moving bodies arranged at equal intervals in the transfer gap. In particular, the moving mechanism that makes the number of exciting coils and the number of moving bodies relatively prime each other always places one of the moving bodies arranged at equal intervals while arranging a plurality of exciting coils at equal intervals. As a state of acceleration by any one of the exciting coils, a plurality of moving bodies can be continuously driven to rotate smoothly.

  As described above, the moving mechanism that makes the pair of opposing walls 2 circular can transfer the plurality of moving bodies 3 endlessly along the ring-shaped transfer gap 5.

DESCRIPTION OF SYMBOLS 1 ... Base plate 2 ... Opposite wall 2A ... Outer wall 2A
2B ... Inner wall 2B
DESCRIPTION OF SYMBOLS 3 ... Moving body 4 ... Attraction magnet 5 ... Transfer gap 6 ... Guide roll 7 ... Guide roll 8 ... Yoke 10 ... Drive mechanism 11 ... Excitation coil 12 ... Position sensor 13 ... Control circuit 15 ... Connecting member 16 ... Connecting arm 17 ... Center Connecting part

Claims (10)

A base plate (1),
A pair of opposing surfaces made of a non-magnetic material fixed to the base plate (1) and disposed on the surface of the base plate (1) so as to oppose each other at a predetermined interval and provided with a transfer gap (5) having a predetermined width. The wall (2),
A movable body (3) made of a permanent magnet that is arranged movably in the transfer gap (5) of the opposite wall (2) and has opposite surfaces on both sides facing the pair of opposite walls (2) as different magnetic poles,
A plurality of permanent magnets arranged along the opposing wall (2) on the outside of the opposing wall (2) and having a facing surface facing the moving body (3) as a magnetic pole different from the magnetic pole of the moving body (3) A suction magnet (4)
A pair of attracting magnets (4) arranged on both sides of the moving body (3) balances and attracts the moving body (3) to form a transfer gap (5) between the opposing walls (2). A moving mechanism configured to move a moving body (3) in a magnetic float state in a transfer gap (5) inside the opposing wall (2).   The moving mechanism according to claim 1, wherein the attraction magnet (4) is disposed outside the opposing wall (2) at a predetermined angle with respect to the opposing wall (2).   A predetermined gap is provided between the adjacent attracting magnets (4), and the length (L) of the movable body (3) is 1.5 of the center interval (d) between the adjacent attracting magnets (4). The moving mechanism according to claim 1 or 2, wherein the moving mechanism is double or more.   The moving mechanism according to any one of claims 1 to 3, wherein a guide roll (7) made of a non-magnetic material is disposed on the inner surface of the facing wall (2).   The moving mechanism according to any one of claims 1 to 4, wherein the opposing wall (2) is fixed to a base plate (1), and the base plate (1) is disposed in a horizontal plane.   The moving mechanism according to any one of claims 1 to 5, wherein the attraction magnet (4) attracts the moving body (3) and moves it in a state of floating from the base plate (1).   The moving mechanism according to any one of claims 1 to 6, further comprising a driving mechanism (10) for moving the moving body (3) along the opposing wall (2). The drive mechanism (10) attracts and accelerates the moving body (3), an excitation coil (11), a position sensor (12) that detects the position of the moving body (3), and the position sensor (12 ) And the control circuit (13) for detecting the position of the moving body (3) and controlling the current of the exciting coil (11),
The control circuit (13) controls the current of the exciting coil (11) at the position of the moving body (3) detected by the position sensor (12) to accelerate the moving body (3). The moving mechanism according to claim 7.   Provided with a yoke (8) arranged outside the pair of attracting magnets (4) arranged outside the opposing wall (2), and both ends of the yoke (8) are connected to the pair of attracting magnets (4). The moving mechanism according to any one of claims 1 to 8, wherein the magnetic circuit of the attracting magnet (4) and the moving body (3) is connected with a yoke (8) to form a closed loop.   The moving mechanism according to any one of claims 1 to 9, wherein a gap between the facing wall (2) and the moving body (3) is 0.1 mm or more and 2 mm or less.

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