JP2005350170A - Roller device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller conveyor capable of rotating a transport roller still more efficiently. <P>SOLUTION: End face 21a of an electromagnet unit 21 is positioned concentrically confronting the end face 11a of a permanent magnet 11 attached to one end face 2a of the transport roller 2. The permanent magnet 11 is rotated by the electromagnetic attraction force and repulsive force between the N-pole side magnetic flux and the S-pole side magnetic flux formed by the drive coil of the electromagnet unit 21 and the S-pole band and N-pole band of the permanent magnet 11. The electromagnet unit 21 and the permanent magnet 11 confront in the plane-to-plane form, and they can be put in proximity still more to each other. The direction of the magnetic flux from the electromagnet unit 21 is made perpendicular to the end face 21a of the electromagnet unit 21 and the end face 11a of the permanent magnet 11, and the magnetic field from the electromagnet unit 21 reaches the permanent magnet 11 efficiently. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a roller device including a roller that can rotate in a circumferential direction.

  Conventionally, a roller conveyor as this type of roller device includes a pair of conveyor frames arranged in parallel to face each other. Between the pair of conveyor frames, a plurality of cylindrical rollers for transporting the conveyed product are attached in a state where they are bridged in a rotatable manner. Cylindrical permanent magnets in which S poles and N poles are alternately formed along the circumferential direction are respectively attached to one end portions of the plurality of cylindrical rollers. In addition, an elongated plate-shaped primary side stator member is attached to the conveyor frame located on the side where the permanent magnets are attached so as to face the outer peripheral surfaces of the permanent magnets.

This primary side stator member is provided with a plurality of drive coils disposed at positions corresponding to the respective permanent magnets attached to the respective cylindrical rollers. Then, different magnetic fields are alternately formed by forming a magnetic field from the drive coil of the primary side stator member, and an electromagnetic attractive force and a repulsive force with a permanent magnet disposed facing these drive coils. Therefore, a configuration is known in which each cylindrical roller is rotationally driven by rotationally driving the permanent magnet (see, for example, Patent Document 1).
JP-A-10-72107 (page 3-4, FIGS. 1 to 3)

  However, in the roller conveyor described above, the flat drive coils of the primary stator member of the elongated rectangular flat plate are opposed to the outer peripheral surface of the cylindrical permanent magnet attached to one end of each cylindrical roller. Arranged. Therefore, the portion where these cylindrical permanent magnets and the flat drive coil are closest is only a small linear area. For this reason, it is not easy to efficiently reach the magnetic field formed by the drive coil to the permanent magnet, so that the electromagnetic attractive force or repulsive force between the drive coil and the permanent magnet is reduced. As a result, there is a problem that it is not easy to efficiently rotate the cylindrical roller through the permanent magnet without uneven rotation.

  SUMMARY An advantage of some aspects of the invention is that it provides a roller device that can rotate a roller more efficiently.

  The roller device according to claim 1 is provided with a rotatable roller, a magnetic body concentrically attached to the roller, and disposed opposite to the magnetic body to form a magnetic field on the magnetic body. And a magnetic field generating means for rotationally driving the roller via the magnetic body.

  A magnetic field generating means for forming a magnetic field on the magnetic body concentrically attached to the rotatable roller and rotating the roller via the magnetic body is disposed opposite to the magnetic body. As a result, the magnetic field generating means and the magnetic body can be opposed to each other in a planar shape, so that the magnetic field formed by the magnetic field generating means reaches the magnetic body efficiently. Accordingly, the roller can be efficiently driven to rotate by the magnetic field generated by the magnetic field generating means.

  The roller device according to a second aspect is the roller device according to the first aspect, wherein the magnetic body has end faces on which different magnetic poles are alternately formed in the circumferential direction of the roller, and the magnetic field generating means A magnetic field corresponding to the magnetic field formed on the end surface of the magnetic material is formed opposite to the end surface through a gap, and the magnetic attraction and repulsive force between the magnetic material and the magnetic material The body is driven to rotate.

  And it is set as the magnetic body which has an end surface which forms a different magnetic pole alternately toward the circumferential direction of a roller. Further, the magnetic body is disposed through a gap so as to face the end surface of the magnetic body, and a magnetic field corresponding to the magnetic field formed on the end surface of the magnetic body is formed so as to generate an electromagnetic attractive force and repulsion with the magnetic body. Magnetic field generating means for rotating the magnetic body by force is used. As a result, the magnetic field formed by the magnetic field generating means can act on each of the different magnetic poles alternately formed on the end surface of the magnetic body in the circumferential direction of the roller. For this reason, the electromagnetic attractive force and the repulsive force formed between the magnetic field generating means and the end face of the magnetic body can be increased, so that the roller can be driven to rotate more efficiently by the magnetic field formed by the magnetic field generating means. .

  The roller device according to claim 3 is the roller device according to claim 1 or 2, wherein the magnetic body is a cylindrical permanent magnet in which S poles and N poles are alternately formed in the circumferential direction. Is a cylindrical electromagnet unit having a plurality of coils corresponding at least to each of the S pole and the N pole formed on the magnetic body, each of which is arranged radially along the radial direction.

  The magnetic body is a cylindrical permanent magnet in which S poles and N poles are alternately formed in the circumferential direction. Further, the magnetic field generating means is a columnar electromagnet unit having a plurality of coils corresponding to at least the S pole and the N pole formed on the magnetic body, each of which is arranged radially along the radial direction. . As a result, by alternately changing the direction of the current flowing in the plurality of coils of the electromagnet unit, the direction of the magnetic field formed by the plurality of coils is changed to correspond to each of the S pole and N pole of the permanent magnet. it can. Therefore, the rotation of the roller via the permanent magnet can be more efficiently driven, and the driving of the roller can be controlled more easily.

  According to the roller device of the first aspect, since the magnetic field generating means is disposed so as to face the magnetic body, the magnetic field generating means and the magnetic body can be opposed to each other in a planar shape. Therefore, the roller can be efficiently driven to rotate by the magnetic field generated by the magnetic field generating means.

  According to the roller device according to claim 2, in addition to the effect of the roller device according to claim 1, a magnetic field is generated for each of different magnetic poles alternately formed on the end surface of the magnetic body in the circumferential direction of the roller. Since the magnetic field formed by the means can act, the electromagnetic attractive force and the repulsive force formed between the magnetic field generating means and the end face of the magnetic body can be increased, so the magnetic field formed by the magnetic field generating means It is possible to drive the roller more efficiently.

  According to the roller device according to claim 3, in addition to the effect of the roller device according to claim 1 or 2, only by alternately changing the direction of the current flowing through the plurality of coils of the electromagnet unit, Since the direction of the magnetic field to be formed can be changed corresponding to each of the S pole and N pole of the permanent magnet, the rotation of the roller via the permanent magnet can be more efficiently driven, and the drive control of this roller is easier. Can be.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 to 6, reference numeral 1 denotes a roller conveyor which is a conveyor device as a roller device. The roller conveyor 1 is a linear drive conveyor that rotates the conveying roller 2 by alternately switching electromagnetic attractive force or repulsive force. The roller conveyor 1 has a conveyor body 3. A flat conveyance surface 4 is formed on the conveyor main body 3 along a conveyance direction F in which a conveyance object such as an article is conveyed.

  The conveyor body 3 includes a pair of conveyor frames 5 and 6 disposed in parallel to face each other. The pair of conveyor frames 5 and 6 are connected and connected by a connecting member (not shown) at predetermined intervals. Further, as shown in FIG. 3, the pair of conveyor frames 5 and 6 are provided with legs 8 and the like so as to be positioned at a predetermined height.

  Furthermore, between the pair of conveyor frames 5 and 6, a plurality of transport rollers 2, which are elongated cylindrical rollers, are attached so as to be rotatable in the circumferential direction. Each of these transport rollers 2 is rotatably attached in a state where the axial direction is along the width direction orthogonal to the transport direction F of the conveyor body 3. Further, the transport rollers 2 are arranged along the transport surface 4 of the conveyor body 3 in a state of being spaced apart at equal intervals in the transport direction F of the conveyor body 3. In other words, the transport rollers 2 are rotatable around their own axes orthogonal to the transport direction F.

  Here, a shaft body 7 serving as a rotation center is inserted into and attached to the transport rollers 2 so as to be slidable concentrically along the central axis direction. These shaft bodies 7 are inserted into the center of the conveying roller 2 and fixed to both inner side surfaces of the pair of conveyor frames 5 and 6 respectively.

  A disc-shaped permanent magnet 11 as a magnetic body is attached to one end surface 2a which is a side surface portion along the axial direction of the transport roller 2. These permanent magnets 11 are formed in a cylindrical shape having an outer diameter dimension equal to the outer diameter dimension of each transport roller 2. That is, these permanent magnets 11 are attached and fixed concentrically with respect to one end face 2a of each transport roller 2. Therefore, the shaft body 7 is also inserted and attached to these permanent magnets 11 so as to be slidable concentrically along the central axis direction.

  Further, as shown in FIG. 4, the end faces 11a of these permanent magnets 11 are provided with S-pole band 12 and N-pole magnetic fluxes that form S-pole magnetic fluxes that are different magnetic poles in the circumferential direction of these permanent magnets 11. The N pole bands 13 to be formed are alternately formed. That is, these permanent magnets 11 are equally divided into an even number, for example, 8 pieces at equal intervals in the circumferential direction of these permanent magnets 11 along the axial direction of these permanent magnets 11. Each of the regions equally divided into S pole bands 12 and N pole bands 13 having different magnetism are alternately arranged.

  Here, each of the S-pole band 12 and the N-pole band 13 that is equally divided into eight pieces is divided along the radial direction of the end face 11 a of the permanent magnet 11. Therefore, the S pole band 12 and the N pole band 13 are alternately formed at equal intervals on the outer peripheral surface 11b of each permanent magnet 11. In other words, each of these permanent magnets 11 is a cylindrical magnet in which S pole bands 12 and N pole bands 13 are alternately arranged in a circular shape.

  A plurality of cylindrical electromagnet units 21 serving as magnetic field generating means as drive means are disposed at positions facing the permanent magnets 11 respectively. These electromagnet units 21 are magnetic force generating means for generating an attractive force or a repulsive force with respect to an external magnetic force. The electromagnet unit 21 is a primary side stator that rotationally drives the transport roller 2 via the permanent magnet 11. The electromagnet units 21 are concentrically attached at positions along the axial direction of the transport roller 2.

  That is, as shown in FIGS. 1, 2, 3 and 6, these electromagnet units 21 are in a non-contact state with respect to the end surface 11a of the corresponding permanent magnet 11, that is, concentrically through a predetermined gap. It is arranged in close proximity. Further, each of the electromagnet units 21 is attached to the inner surface of the conveyor frame 5 on the side facing the end surface 11a of the permanent magnet 11 attached to each of the transport rollers 2. At this time, the permanent magnet 11 facing the electromagnet unit 21 and the shaft body 7 inserted through the conveying roller 2 are inserted into the electromagnet units 21 so as to be slidable concentrically along the central axis direction. .

  Here, these electromagnet units 21 form a magnetic field with respect to the permanent magnets 11 arranged so as to face each other, and the permanent magnets 11 are attached via the permanent magnets 11. The conveying roller 2 that is present is driven to rotate. In other words, these electromagnet units 21 form a magnetic field corresponding to the magnetic field formed on the end surface 11a of the permanent magnet 11 opposed to the electromagnet units 21, and the electromagnetic attractive force between the permanent magnets 11 and The permanent magnet 11 is rotationally driven by the repulsive force.

  In each of the electromagnet units 21, a plurality of, for example, 16 drive coils 22 are radially attached, as shown in FIG. These drive coils 22 are configured by winding a plurality of conductive wires such as copper wires. That is, these drive coils 22 are configured so that N-pole side magnetic flux and S-pole side magnetic flux can be alternately formed by changing the direction of the flowing current. Further, the drive coils 22 are spaced apart at equal intervals in the circumferential direction of the electromagnet unit 21 in a state of facing the end surface 21a of the electromagnet unit 21, and the longitudinal direction is in the radial direction of the electromagnet unit 21. Are arranged radially.

  Further, as many drive coils 22 as the number corresponding to the number of S pole bands 12 and N pole bands 13 formed in the permanent magnet 11 are provided. Specifically, since the number of the S pole band 12 and the N pole band 13 formed on the permanent magnet 11 is eight, these drive coils 22 are sixteen times the number corresponding to the eight. It is provided. In other words, the drive coils 22 correspond at least to the S pole band 12 and the N pole band 13 formed in the permanent magnet 11, respectively.

  Accordingly, the electromagnet units 21 are configured so that the magnetic flux formed by the drive coils 22 of the electromagnet units 21 is planar with respect to the end surfaces 11a of the permanent magnets 11 disposed to face the electromagnet units 21. To reach. Further, a linear motor 23 is constituted by the plurality of electromagnet units 21 and the permanent magnet 11. Each transport roller 2 functions as a rotor that is rotationally driven by the linear motor 23.

  Next, the operation of the above embodiment will be described.

  First, each of the drive coils 22 in the electromagnet unit 21 is supplied with two currents in the circumferential direction in the reverse direction, and the N-pole side magnetic flux and the S-pole side are supplied to each of the drive coils 22. Magnetic flux is alternately formed along the circumferential direction of the electromagnet unit 21.

  At this time, between the north pole side magnetic flux formed by these drive coils 22 and the south pole band 12 formed on the permanent magnet 11, and the south pole side magnetic flux formed by the drive coil 22 and the permanent magnet 11. Between the N pole band 13 formed in the permanent magnet 11 and the N pole side magnetic flux formed in the drive coil 22, and A repulsive force is generated between the south pole side magnetic flux formed by the drive coil 22 and the south pole band 12 formed on the permanent magnet 11.

  As a result, the permanent magnet 11 rotates about 45 ° in the circumferential direction by the attractive force and the repulsive force between the drive coil 22 and the permanent magnet 11.

  Thereafter, the direction of the current flowing through the drive coil 22 in the electromagnet unit 21 is reversed, and the N-pole side magnetic flux and the S-pole side magnetic flux formed by these drive coils 22 are reversed.

  At this time, due to the reversal of the N-pole side magnetic flux and the S-pole side magnetic flux formed by these drive coils 22, the S-pole band 12 and the N-pole band 13 formed in the permanent magnet 11 respectively. A repulsive force is generated between them, and the permanent magnet 11 is further rotated about 45 ° in the circumferential direction by the repulsive force between the drive coil 22 and the permanent magnet 11.

  Accordingly, by alternately reversing the direction of the current flowing through each drive coil 22 of each electromagnet unit 21 at a predetermined time interval, the permanent magnet 11 rotates smoothly and continuously. The transport roller 2 rotates smoothly and continuously.

  As a result, by rotating each of the transport rollers 2 of the roller conveyor 1, the transported material transported onto the transport rollers 2 is transported from the upstream side to the downstream side.

  As described above, according to the above-described embodiment, the end surface 21a of the cylindrical electromagnet unit 21 is concentric with the end surface 11a of the cylindrical permanent magnet 11 concentrically attached to the one end surface 2a of the transport roller 2. To face. Further, the N pole side magnetic flux and the S pole side magnetic flux are alternately formed along the circumferential direction by the respective drive coils 22 in the electromagnet unit 21, and the N pole side magnetic flux, the S pole side magnetic flux, and the permanent magnet 11 are formed. The permanent magnet 11 is rotationally driven by a magnetic attractive force or repulsive force between the S pole band 12 and the N pole band 13 formed along the circumferential direction.

  As a result, since the electromagnet unit 21 and the permanent magnet 11 face each other in a planar shape, the electromagnet unit 21 and the permanent magnet 11 can be brought closer to each other. At this time, as shown in FIG. 6, the direction of the magnetic flux formed in the electromagnet unit 21 is perpendicular to the end surface 21 a of the electromagnet unit 21 and the end surface 11 a of the permanent magnet 11. Therefore, the magnetic flux formed from the end surface 21a of the electromagnet unit 21 can reach the end surface 11a of the permanent magnet 11 in a planar shape.

  Therefore, the magnetic field formed by each drive coil 22 of the electromagnet unit 21 can reach the permanent magnet 11 efficiently. For this reason, the permanent magnet 11 can be efficiently rotated without unevenness of rotation by the magnetic field formed by the electromagnet unit 21. Accordingly, the rotation of the transport roller 2 can be efficiently driven by the rotation of the permanent magnet 11 without unevenness of rotation, so that the rotational drive of the transport roller 2 can be saved.

  At this time, a magnetic flux is formed in each drive coil 22 of the electromagnet unit 21, the permanent magnet 11 is rotated by the action of the magnetic flux, and the conveying roller 2 is rotationally driven along with the rotation of the permanent magnet 11. It was. For this reason, the structure of the roller conveyor 1 is simplified, noise can be reduced, and high speed can be achieved. At the same time, the occurrence of troubles in the roller conveyor 1 can be reduced, and addition of an accumulation rate function and the like can be facilitated.

  In addition, the drive coils 22 are arranged radially in the electromagnet unit 21, and the N pole side magnetic flux and the S pole side magnetic flux are alternately formed in the drive coil 22 from the electromagnet unit 21 in the circumferential direction. did. At the same time, the end face 11a of the permanent magnet 11 in which the S pole band 12 and the N pole band 13 are alternately formed along the circumferential direction is concentrically opposed to the end face 21a of the electromagnet unit 21. As a result, the N pole side magnetic flux and the S pole side magnetic flux formed from the end face 21a of the electromagnet unit 21 with respect to the S pole band 12 and the N pole band 13 alternately formed on the end face 11a of the permanent magnet 11, respectively. Can act. Therefore, the electromagnetic attractive force and repulsive force formed between the electromagnet unit 21 and the permanent magnet 11 can be further increased. For this reason, each conveyance roller 2 can be rotationally driven more efficiently by the magnetic field formed by the electromagnet unit 21.

  Further, the number of drive coils 22 in the electromagnet unit 21 is made to correspond to the number of the S pole band 12 and the N pole band 13 of the permanent magnet 11, and these drive coils 22 are arranged radially at equal intervals. As a result, by alternately converting the direction of the current flowing through the drive coil 22 in the electromagnet unit 21, the direction of the magnetic field formed by the plurality of drive coils 22 is changed to the S pole band 12 and N of the permanent magnet 11. Corresponding to each of the pole bands 13, the N pole side magnetic flux formed from the end face 21a of the electromagnet unit 21 can be changed to the S pole side magnetic flux, and the S pole side magnetic flux can be changed alternately to the N pole side magnetic flux. Therefore, the rotation driving of the conveying roller 2 via the permanent magnet 11 can be performed more efficiently, and the driving control of the conveying roller 2 can be facilitated.

  In addition, each conveying roller 2 is driven to rotate by electromagnetic force generated by the electromagnet unit 21 and the permanent magnet 11. As a result, there is no need to attach a drive motor or the like as a driving means for rotating the transport rollers 2 to the lower surface of the conveyor body 3, and a belt or the like is wound around the transport rollers 2 so that the transport rollers 2 are interlocked. Therefore, it is not necessary to drive the rotation. Therefore, since a projecting object such as a drive motor, a chain, or a belt protruding from the lower surface of the conveyor body 3 can be eliminated, the configuration of the conveyor body 3 can be further simplified.

  In the above embodiment, each of the transport rollers 2 of the roller conveyor 1 is rotated by electromagnetic force between the electromagnet unit 21 and the permanent magnet 11, but any one of these transport rollers 2 is electromagnet unit. It can also be configured to rotate by the electromagnetic force of 21 and the permanent magnet 11 so that the other transport rollers 2 are interlocked with the rotation of the transport rollers 2.

  Furthermore, it is possible to pass a current in the opposite direction to each drive coil 22 of the electromagnet unit 21 and rotate the permanent magnet 11 with the magnetic flux formed by these drive coils 22. At this time, since the magnetic flux formed by each drive coil 22 of the electromagnet unit 21 can be changed more finely, the permanent magnet 11 can be rotated more smoothly by the magnetic flux formed by the electromagnet unit 21. Accordingly, the transport rollers 2 can be rotated more smoothly and continuously through the permanent magnet 11.

  At this time, the number of each drive coil 22 of the electromagnet unit 21 can be matched with the number of magnetic poles formed on the end face 11a of the permanent magnet 11, that is, the S pole band 12 and the N pole band 13.

  In addition, the electromagnetic force generated by the electromagnet unit 21 and the permanent magnet 11 rotates a roller that rotates the belt of the belt conveyor, or a belt that is wound around each conveying roller 2 of the roller conveyor 1 and interlocks the conveying roller 2. A configuration in which a roller or the like is driven to rotate can also be used. Further, the electromagnetic force generated by the electromagnet unit 21 and the permanent magnet 11 rotationally drives gears that rotate the chain that rotates the transport roller 2 and rollers that are a plurality of transport rotating bodies attached to the transport surface of the roller conveyor. It can also be configured to be made.

It is explanatory side view which shows the roller apparatus of one embodiment of this invention. It is an explanatory top view which shows a roller apparatus same as the above. It is explanatory perspective view which shows a roller apparatus same as the above. It is an explanatory top view which shows the magnetic body of a roller apparatus same as the above. It is an explanatory top view which shows the magnetic field generation | occurrence | production means of a roller apparatus same as the above. It is an explanatory top view which shows the direction of the magnetic flux between the magnetic field generation | occurrence | production means and magnetic body of a roller apparatus same as the above.

Explanation of symbols

1 Roller conveyor as a roller device 2 Conveyance roller as a roller
11 Permanent magnet as a magnetic material
11a End face
21 Electromagnet unit as magnetic field generation means
22 Driving coil as a coil

Claims (3)

A rotatable roller;
A magnetic body concentrically attached to this roller;
A roller device comprising: a magnetic field generating means disposed opposite to the magnetic body, forming a magnetic field with respect to the magnetic body, and rotating the roller through the magnetic body. The magnetic body has end faces that alternately form different magnetic poles in the circumferential direction of the roller,
The magnetic field generating means is disposed through a gap so as to face the end face of the magnetic body, forms a magnetic field corresponding to the magnetic field formed on the end face of the magnetic body, and electromagnetically communicates with the magnetic body. The roller device according to claim 1, wherein the magnetic body is rotationally driven by a strong attractive force and a repulsive force. The magnetic body is a cylindrical permanent magnet in which S poles and N poles are alternately formed in the circumferential direction.
The magnetic field generating means is a cylindrical electromagnet unit having a plurality of coils corresponding to at least the S pole and the N pole formed on the magnetic body, each of which is arranged radially along the radial direction. The roller device according to claim 1, wherein:

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