JP4582575B2 - Roller device - Google Patents

Description

  The present invention relates to a roller device including a roller that is rotatable 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. A cylindrical permanent magnet having an outer peripheral surface in which S poles and N poles are alternately formed in the circumferential direction is attached to one end of each 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. And a different magnetic field is alternately formed by forming a magnetic field from the drive coil of this primary side stator member. That is, a configuration is known in which each cylindrical roller is rotationally driven by rotationally driving the permanent magnet by an electromagnetic attractive force and a repulsive force with the permanent magnet disposed opposite to the drive coils. (For example, refer to 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.

請 Motomeko 1 roller apparatus described includes a pair of conveyor frames away facing each other, a cylindrical outer peripheral surface of which forms a conveying surface for conveying the conveying object, rotatable located between the two conveyor frame A roller and an inner surface of the conveyor frame so as to be concentric with the roller, the outer diameter is equal to the outer diameter of the cylindrical outer peripheral surface of the roller, and at least a part of the roller is inside A cylindrical magnetic field generating means for inserting and forming a rotating magnetic field on at least a part of the roller and rotating the roller, and the roller is a cylinder attached concentrically to the roller. comprising a Jo magnetic body, the magnetic field generating means, said to form a magnetic field to the magnetic body, a roller device for rotating the magnetic body, the magnetic body is different toward the circumferential direction Poles has an outer peripheral surface formed alternately, wherein the magnetic field generating means has a housing recess in which the magnetic body is inserted rotatably, the inner periphery of the housing recessed portion facing the outer circumferential surface of the magnetic body A magnetic field corresponding to a magnetic pole formed on the outer peripheral surface of the magnetic body is formed on the surface, and the roller is driven to rotate by the magnetic body.

Then, by inserting at least a part of the rotatable roller into the magnetic field generating unit, at least a part of the roller and the magnetic field generating unit face each other in a planar shape in the circumferential direction. Therefore, by forming a rotating magnetic field on at least a part of the roller by this magnetic field generating means, the rotating magnetic field formed by this magnetic field generating means efficiently reaches at least a part of the roller. For this reason, the roller can be efficiently driven to rotate by the rotating magnetic field formed by the magnetic field generating means. The magnetic field generating means forms a magnetic field on the cylindrical magnetic body attached concentrically with the roller. For this reason, since this magnetic body and the magnetic field generation means are opposed to each other in a planar shape in the circumferential direction, the magnetic field formed by the magnetic field generation means efficiently reaches the magnetic body. Therefore, since the magnetic body can be efficiently rotated by the magnetic field generated by the magnetic field generating means, the roller can be efficiently driven to rotate by the rotation of the magnetic body. Further, a cylindrical magnetic body having an outer peripheral surface in which different magnetic poles are alternately formed in the circumferential direction is rotatably inserted into the receiving recess of the magnetic field generating means. At this time, the inner peripheral surface of the accommodating recess of the magnetic field generating means and the outer peripheral surface of the magnetic body face each other in a plane shape in the circumferential direction. Therefore, by forming a magnetic field corresponding to the magnetic pole formed on the outer peripheral surface of the magnetic body on the inner peripheral surface of the housing recess, the magnetic field formed on the inner surface of the magnetic field generating means is efficiently applied to the outer peripheral surface of the magnetic body. reach. The roller can be efficiently rotated by the magnetic field formed on the inner surface of 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 is fixed to one end surface of the roller, and the magnetic field forming means is formed by concentrically attaching the magnetic body in the housing recess. is there.

  And the magnetic body was fixed to the end surface of a roller, and this magnetic body was concentrically attached in the accommodation recessed part of a magnetic field formation means. As a result, the outer peripheral surface of the magnetic body concentrically opposes the inner peripheral surface of the housing recess of the magnetic field forming means. Therefore, the magnetic field formed by the inner peripheral surface of the accommodating recess of this magnetic field forming means reaches the outer peripheral surface of the magnetic body more efficiently. Therefore, the roller can be driven to rotate more efficiently by the magnetic field formed on the inner surface of the magnetic field generating means.

Roller device according to claim 3, in the roller device according to claim 1 or 2, wherein the magnetic body is a cylindrical permanent magnet having an outer peripheral surface of S pole and N pole are alternately formed toward the circumferential direction The magnetic field generating means has a cylindrical shape including a plurality of coils corresponding to at least the S pole and the N pole formed on the outer peripheral surface of the magnetic body and spaced apart in the circumferential direction of the housing recess. This is an electromagnet unit.

  And let a magnetic body be the cylindrical permanent magnet which has the outer peripheral surface in which the S pole and the N pole were alternately formed toward the circumferential direction. Further, the magnetic field generating means corresponds to at least the S pole and the N pole formed on the outer peripheral surface of the magnetic body, and has a cylindrical shape provided with a plurality of coils that are spaced apart in the circumferential direction of the housing recess. The electromagnet unit. 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 rotational drive of the roller by this permanent magnet can be made more efficient, and the drive control of this roller can be made easier.

According to the roller apparatus 請 Motomeko 1, because there is at least a portion and a magnetic field generating means of the roller opposite the surface towards the circumferential direction, rotation to at least a portion of the roller with the magnetic field generating means a magnetic field Since the rotating magnetic field formed by the magnetic field generating means reaches at least a part of the roller efficiently, the roller can be efficiently rotated by the rotating magnetic field formed by the magnetic field generating means. In addition, since the magnetic body and the magnetic field generation means face each other in the circumferential direction, the magnetic field formed by the magnetic field generation means efficiently reaches the magnetic body. Since the roller can be efficiently rotated, the roller can be efficiently rotated by the rotation of the magnetic body. Furthermore, since the inner peripheral surface of the accommodating recess of the magnetic field generating means and the outer peripheral surface of the magnetic body face each other in the circumferential direction, the magnetic pole formed on the outer peripheral surface of the magnetic body on the inner peripheral surface of the accommodating recess Since the magnetic field formed on the inner surface of the magnetic field generating means can be efficiently delivered to the outer peripheral surface of the magnetic body by forming a magnetic field corresponding to Can be driven efficiently.

According to the roller device of the second aspect, in addition to the effect of the roller device of the first aspect, since the outer peripheral surface of the magnetic body is concentrically opposed to the inner peripheral surface of the accommodating recess of the magnetic field forming means, this magnetic field formation Since the magnetic field formed on the inner peripheral surface of the housing recess of the means can be efficiently delivered to the outer peripheral surface of the magnetic body, the roller can be driven to rotate more efficiently by the magnetic field formed on the inner side surface of the magnetic field generating means.

According to the roller apparatus according to claim 3, in addition to the effect of the roller device according to claim 1 or 2, wherein, only converts the direction of the current flowing through the plurality of coils of the electromagnet units alternately, at the plurality of coils 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 by the permanent magnet can be made more efficient and the drive control of this roller can be made easier. .

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

  1 to 5, reference numeral 1 denotes a roller conveyor 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 is a shaft driving conveyor as a conveyor device that drives a shaft 7 inserted through the rotation center of the conveying roller 2. 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. 4, 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 that are elongated cylindrical rollers are attached 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 7 as a shaft serving as a center of rotation is inserted into and attached to the transport rollers 2 concentrically along the central axis direction. These shafts 7 are pivotally supported by being attached to the inner side surfaces of the pair of conveyor frames 5 and 6 so as to be rotatable in the circumferential direction while being inserted through the center of the transport roller 2.

  A cylindrical permanent magnet 11 as a magnetic body is attached to one end surface 2a that is a side surface portion along the axial direction of the transport roller 2 via a predetermined gap. That is, these permanent magnets 11 constitute at least a part of the transport roller 2. The permanent magnets 11 are formed in a cylindrical shape having an inner diameter that is slightly larger than the outer diameter of the shaft 7 that rotatably supports the transport roller 2 to which the permanent magnets 11 are attached. Further, the permanent magnets 11 are arranged at one end surfaces of the transport rollers 2 in a state where the inner side surface 11a that is one side surface along the axial direction of the permanent magnets 11 is concentrically opposed to the one end surface 2a of the transport rollers 2. Attached between 2a and the inner side surface 11a via a predetermined gap. In other words, the permanent magnets 11 are fixed to the transport roller 2 in a state where the inner side surfaces 11a of the permanent magnets 11 are concentrically opposed to the one end surface 2a of the transport roller 2 and separated. In other words, the shaft 7 is also inserted into the permanent magnets 11 concentrically along the central axis direction, and is fixed to the shaft 7.

  Further, on the outer peripheral surface 11b that forms the periphery of these permanent magnets 11, as shown in FIGS. 1 and 5, an S pole that forms a magnetic flux of an S pole that is different in the circumferential direction of these permanent magnets 11 is formed. Bands 12 and N-pole bands 13 forming N-pole magnetic flux are alternately formed. That is, these permanent magnets 11 are divided equally into an even number, for example, 8 at equal intervals in the circumferential direction of these permanent magnets 11 and equally divided into these 8 pieces. These regions are alternately composed of the south pole band 12 and the north pole band 13 having different magnetism. Here, each of the S-pole band 12 and the N-pole band 13 equally divided into eight pieces is divided along the central axis direction of the permanent magnet 11. That is, these permanent magnets 11 are cylindrical magnets in which the S pole band 12 and the N pole band 13 are alternately arranged on the outer peripheral surface 11b. Therefore, the shaft driving roller 14 is constituted by the permanent magnet 11, the conveying roller 2 and the shaft 7.

  These permanent magnets 11 are inserted into a plurality of cylindrical electromagnet units 21 which are magnetic field generating means as driving means and are rotatably arranged. 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 rotates 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.

  Specifically, these electromagnet units 21 are formed in a cylindrical shape into which the permanent magnet 11 can be inserted, as shown in FIGS. A cylindrical housing recess 22 into which the permanent magnet 11 is inserted concentrically is provided at the center of the electromagnet unit 21. The housing recess 22 penetrates in the direction of the central axis of the electromagnet unit 21 and has an inner peripheral surface 21a having an inner diameter dimension larger than the outer diameter dimension of the permanent magnet 11. That is, the permanent magnet 11 is housed in the housing recess 22 so as to be concentrically rotatable with the outer circumferential surface 11b of the permanent magnet 11 facing the inner circumferential surface 21a of the housing recess 22. Yes. In other words, as shown in FIGS. 1 and 2, the inner circumferential surface 21 a of the housing recess 22 is not in contact with the outer circumferential surface 11 b of the corresponding permanent magnet 11 in the housing recess 22 of the electromagnet unit 21. That is, they are arranged concentrically in close proximity via a predetermined gap.

  Further, each of the electromagnet units 21 is attached and fixed to the inner side surface of the conveyor frame 5 on the side facing and facing the outer side surface 11c of the permanent magnet 11 attached to each transport roller 2. At this time, the outer side surface 11c of these permanent magnets 11 is the other side surface located on the opposite side of the inner side surface 11a of these permanent magnets 11. Further, in each electromagnet unit 21, a permanent magnet 11 accommodated in the electromagnet unit 21 and a shaft 7 inserted through the transport roller 2 are inserted so as to be slidable concentrically along the central axis direction. .

  Here, the electromagnet units 21 form a rotating magnetic field on the inner peripheral surface 21a of the accommodating recess 22 of the electromagnet units 21 with respect to the outer peripheral surface 11b of the permanent magnet 11 disposed in the accommodating recess 22. Then, the transport roller 2 to which the permanent magnet 11 is attached is driven to rotate through the permanent magnet 11. In other words, the electromagnet units 21 correspond to the magnetic poles formed on the outer peripheral surface 11b of the permanent magnet 11 accommodated in the accommodating recess 22 from the inner peripheral surface 21a of the accommodating recess 22 of the electromagnet units 21. Create a magnetic field. The electromagnet unit 21 rotates the permanent magnet 11 in the circumferential direction by electromagnetic attraction and repulsion between the outer peripheral surface 11b of the permanent magnet 11 and the transport roller 2 through the permanent magnet 11. Is driven to rotate.

  In each of the electromagnet units 21, as shown in FIGS. 1 and 2, a plurality of, for example, 16 drive coils 23 are radially attached. These drive coils 23 are electromagnetic coils configured by winding a plurality of conductive wires such as copper wires. That is, these drive coils 23 generate a magnetic field by passing a current, and also generate a magnetic force with the outer peripheral surface 11b of the permanent magnet 11.

  Specifically, these drive coils 23 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. Furthermore, these drive coils 23 face the outer peripheral surface 21b, which is one side surface along the axial direction of the electromagnet unit 21, and the inner peripheral surface 21a of the accommodating recess 22 of the electromagnet unit 21 and the electromagnet unit 21. It is arranged between the outer peripheral surface 21c. At this time, the drive coils 23 are arranged at positions spaced at equal intervals in the circumferential direction of the electromagnet unit 21, and are arranged at positions radially diffused at an equal angle from the center of the electromagnet unit 21. Yes.

  Further, the drive coils 23 are provided in a number corresponding to the numbers of the S pole band 12 and the N pole band 13 formed on the outer peripheral surface 11b of the permanent magnet 11. Specifically, since the number of S pole bands 12 and N pole bands 13 formed on the outer peripheral surface 11b of the permanent magnet 11 is eight, these drive coils 23 are twice the number corresponding to these eight coils. About 16 are provided. In other words, these drive coils 23 correspond at least to the S pole band 12 and the N pole band 13 formed on the outer peripheral surface 11b of the permanent magnet 11, respectively.

  Therefore, the electromagnet units 21 are arranged such that the magnetic fluxes formed by the drive coils 23 of the electromagnet units 21 are inserted into the housing recesses 22 of the electromagnet units 21 and the outer peripheral surfaces of the permanent magnets 11 are arranged. Let it reach the surface of 11b. Further, the plurality of electromagnet units 21 and permanent magnets 11 constitute a linear motor 24 as a synchronous motor mainly composed of each drive coil 23. Each transport roller 2 functions as a rotor that is rotationally driven by the linear motor 24. At this time, each electromagnet unit 21 functions as a primary side stator of the linear motor 24.

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

  First, two current coils in the electromagnet unit 21 that are directed in the circumferential direction are set as a pair, and a current is alternately passed in the opposite direction. Then, an N pole side magnetic flux and an S pole side magnetic flux are alternately formed in the circumferential direction from the inner peripheral surface 21a of the accommodating recess 22 of the electromagnet unit 21 by these drive coils 23.

  At this time, between the N pole side magnetic flux formed from the inner peripheral surface 21a of the accommodating recess 22 of these electromagnet units 21 and the S pole band 12 formed on the outer peripheral surface 11b of the permanent magnet 11, and these electromagnet units 21 Electromagnetic attractive force is generated between the S pole side magnetic flux formed from the inner peripheral surface 21a of the receiving recess 22 and the N pole band 13 formed on the outer peripheral surface 11b of the permanent magnet 11.

  Furthermore, between the N pole side magnetic flux formed from the inner peripheral surface 21a of the accommodating recess 22 of these electromagnet units 21 and the N pole band 13 formed on the outer peripheral surface 11b of the permanent magnet 11, and between these electromagnet units 21 An electromagnetic repulsive force is generated between the S pole side magnetic flux formed from the inner peripheral surface 21 a of the housing recess 22 and the S pole band 12 formed on the outer peripheral surface 11 b of the permanent magnet 11.

  As a result, the permanent magnet 11 is moved approximately 45 ° in the circumferential direction by electromagnetic attraction and repulsion between the inner peripheral surface 21a of the accommodating recess 22 of the electromagnet unit 21 and the outer peripheral surface 11b of the permanent magnet 11. It rotates about.

  Thereafter, the direction of the current flowing through the drive coil 23 in the electromagnet unit 21 is reversed, and the N-pole side magnetic flux and the S formed by the drive coil 23 from the inner peripheral surface 21a of the accommodating recess 22 of the electromagnet unit 21. Reverse the pole-side magnetic flux.

  At this time, the S formed on the outer peripheral surface 11b of the permanent magnet 11 due to the reversal of the N pole side magnetic flux and the S pole side magnetic flux formed from the inner peripheral surface 21a of the accommodating recess 22 of these electromagnet units 21. An electromagnetic repulsive force is generated between each of the polar zone 12 and the north pole zone 13. Therefore, due to the electromagnetic repulsive force between the inner peripheral surface 21a of the accommodating recess 22 and the outer peripheral surface 11b of the permanent magnet 11 by the electromagnet unit 21, the permanent magnet 11 further rotates about 45 ° in the circumferential direction. To do.

  Therefore, by alternately reversing the direction of the current flowing through each drive coil 23 of each electromagnet unit 21 at a predetermined time interval, the permanent magnet 11 rotates smoothly and continuously. Thus, the conveying 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 transferred from the transport upstream side to the transport downstream side on the transport surface 4 of the roller conveyor 1. It is conveyed along the conveyance direction F.

  As described above, according to the above-described embodiment, the permanent magnet 11 having the outer peripheral surface 11b in which the S pole band 12 and the N pole band 13 are alternately formed in the circumferential direction is used as the housing recess of the electromagnet unit 21. The permanent magnet 11 is concentrically positioned in the accommodating recess 22 of the electromagnet unit 21 by being accommodated rotatably in the electromagnet unit 21. Further, the N pole side magnetic flux and the S pole side magnetic flux are alternately formed in the circumferential direction from the inner peripheral surface 21a of the housing recess 22 by each drive coil 23 in the electromagnet unit 21, and these N pole side magnetic flux and S The permanent magnet 11 is rotationally driven by a magnetic attractive force or a repulsive force between the pole-side magnetic flux and the S-pole band 12 and the N-pole band 13 formed on the outer peripheral surface 11b of the permanent magnet 11.

  As a result, since the inner peripheral surface 21a of the electromagnet unit 21 and the outer peripheral surface 11b of the permanent magnet 11 face each other in the circumferential direction, the inner peripheral surface 21a of the electromagnet unit 21 and the outer peripheral surface 11b of the permanent magnet 11 And can be closer. At this time, as shown in FIG. 1, the direction of the magnetic flux formed by each drive coil 23 of the electromagnet unit 21 is such that the circumferential direction of the inner circumferential surface 21a of the electromagnet unit 21 and the circumferential direction of the outer circumferential surface 11b of the permanent magnet 11 Is perpendicular to each of the. Therefore, the magnetic flux formed from the inner peripheral surface 21a of the electromagnet unit 21 can reach the outer peripheral surface 11b of the permanent magnet 11 in a planar shape.

  Therefore, the magnetic flux formed from the inner peripheral surface 21a of the electromagnet unit 21 can be applied to the entire outer peripheral surface 11b of the permanent magnet 11, and the inner peripheral surface of the housing recess 22 by each drive coil 23 of the electromagnet unit 21. The magnetic field formed from 21a can efficiently reach the outer peripheral surface 11b of the permanent magnet 11. Therefore, the permanent magnet 11 can be efficiently and smoothly rotated without uneven rotation by the rotating magnetic field formed from the inner peripheral surface 21a of the electromagnet unit 21. Therefore, the rotation of the transport roller 2 can be efficiently and smoothly driven without rotation unevenness by the rotation of the permanent magnet 11, so that the rotation drive of the transport roller 2 can be saved.

  At this time, a magnetic flux is formed in each drive coil 23 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, drive coils 23 are disposed in the electromagnet unit 21 at equal intervals in the circumferential direction, and the drive coil 23 causes the N-pole side magnetic flux and the S-pole side from the inner circumferential surface 21a of the electromagnet unit 21. The magnetic flux and the magnetic flux are alternately formed in the circumferential direction. At the same time, the inner peripheral surface 21a of the electromagnet unit 21 and the outer peripheral surface 11b of the permanent magnet 11 are concentrically opposed to each other. As a result, the N-pole side magnetic flux formed from the inner peripheral surface 21a of the electromagnet unit 21 and the S pole are respectively formed on the S-pole band 12 and the N-pole band 13 alternately formed on the outer peripheral surface 11b of the permanent magnet 11. Each of the pole side magnetic fluxes 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 23 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 23 are equally spaced in the circumferential direction of the electromagnet unit 21. They were spaced apart. As a result, by alternately converting the direction of the current flowing through the drive coil 23 in the electromagnet unit 21, the direction of the magnetic field formed by the plurality of drive coils 23 is changed to the S pole band 12 and N of the permanent magnet 11. Corresponding to each of the polar bands 13, the N pole side magnetic flux formed from the inner peripheral surface 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. it can. 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, the permanent magnet 11 is attached to the one end surface 2a of the transport roller 2, and the S pole band 12 and the N pole band 13 are alternately formed on the outer peripheral surface of the permanent magnet 11. One end portion of the shaft 7 inserted through the rotation center of each conveyance roller 2 is projected from one end surface 2 a of the conveyance roller 2, and the S pole band 12 and the N pole band 13 are formed on the outer peripheral surface of the one end portion of the shaft 7. Even if these are formed alternately to form a permanent magnet, the same effects as those of the above-described embodiment can be obtained.

  Further, each of the transport rollers 2 of the roller conveyor 1 is configured to rotate by electromagnetic force between the electromagnet unit 21 and the permanent magnet 11, but either of the transport rollers 2 is electromagnetic by the electromagnet unit 21 and the permanent magnet 11. It is also possible to employ a configuration in which the other transport rollers 2 are interlocked with the rotation of the transport rollers 2 by being rotationally driven by force.

  Further, it is possible to pass a current in the opposite direction to each drive coil 23 of the electromagnet unit 21 and rotate the permanent magnet 11 with the magnetic flux formed by these drive coils 23. At this time, since the magnetic flux formed by each drive coil 23 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 via the permanent magnet 11.

  At this time, the number of each drive coil 23 of the electromagnet unit 21 can be matched with the number of magnetic poles formed on the outer peripheral surface 11b of the permanent magnet 11, that is, the number of the S pole body 12 and the N pole body 13.

  Also, 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 conveyance roller 2 of the roller conveyor 1 and interlocks the conveyance 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.

  Further, a permanent magnet 11 attached to one end surface 2a of each conveying roller 2 is a cage rotor or a winding rotor (not shown), and these cage rotors or winding rotors are used. A rotating magnetic field is formed from the inner peripheral surface 21a of the electromagnet unit 21 by, for example, a three-phase alternating current such as an RST alternating current or a single-phase alternating magnetic field, and the squirrel-cage rotor or the winding rotor is rotated. In addition, it is possible to adopt a configuration in which each transport roller is rotationally driven.

It is an explanatory perspective view showing a roller device of one embodiment of the present invention. It is explanatory side view which shows a roller apparatus same as the above. It is explanatory front 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 a description perspective view which shows the magnetic body of a roller apparatus same as the above.

DESCRIPTION OF SYMBOLS 1 Roller conveyor as roller apparatus 2 Conveyance roller as roller 4 Conveyance surface 5,6 Conveyor frame
11 Permanent magnet as a magnetic material
11b Outer peripheral surface
12 S pole as S pole
13 North Pole as North Pole
21 Electromagnet unit as magnetic field generation means
21a Inner peripheral surface
22 Housing recess
23 Drive coil as a coil

Claims (3)

A pair of conveyor frames spaced apart from each other;
A rotatable roller having a cylindrical outer peripheral surface forming a conveying surface for conveying a conveyed product, and positioned between the two conveyor frames;
It is attached to the inner surface of the conveyor frame so as to be concentric with the roller, the outer diameter dimension is equal to the outer diameter dimension of the cylindrical outer peripheral surface of the roller, and at least a part of the roller is inserted inside, A cylindrical magnetic field generating means for forming a rotating magnetic field on at least a part of the roller and rotating the roller;
The roller includes a cylindrical magnetic body attached concentrically to the roller,
The magnetic field generating means is a roller device that rotates the magnetic body by forming a magnetic field on the magnetic body,
The magnetic body has an outer peripheral surface in which different magnetic poles are alternately formed in the circumferential direction,
The magnetic field generating means has a housing recess into which the magnetic body is rotatably inserted, and is formed on the outer peripheral surface of the magnetic body on the inner peripheral surface of the housing recess facing the outer peripheral surface of the magnetic body. forming a magnetic field corresponding to the magnetic pole, b over La apparatus characterized by rotationally driving the roller by the magnetic body. The magnetic body is fixed to one end surface of the roller,
Magnetic field forming means, the roller device according to claim 1, wherein characterized in that the magnetic body is mounted concentrically in the housing recess. The magnetic body is a cylindrical permanent magnet having an outer peripheral surface in which S poles and N poles are alternately formed in the circumferential direction.
The magnetic field generation means corresponds to at least each of the S pole and the N pole formed on the outer peripheral surface of the magnetic body, and has a cylindrical shape including a plurality of coils that are spaced apart in the circumferential direction of the housing recess. roller apparatus according to claim 1, wherein the characterized in that the electromagnet unit.