JP5256538B2 - Electromagnetic device - Google Patents

Description

  The present invention relates to an electromagnetic device that attracts a workpiece (magnetic material) by magnetic flux generated by energizing a coil.

  2. Description of the Related Art Conventionally, electromagnets are known for sorting articles and the like under the action of magnetic flux generated by passing a current through an exciting coil wound around an iron core (see Patent Documents 1 to 3).

  In the sorting apparatus 200 disclosed in Patent Document 1, as shown in FIG. 44, a part of the magnetic guide 206 is magnetized by the magnetic flux generated from one electromagnet 204 arranged on the sorting table main body 202. . The magnetized portion repels the permanent magnet 210 attached to the tip of the sliding member 208. As a result, the articles 214 conveyed from the conveyor 212 are distributed to the desired conveyor 216.

  In the switching device 220 disclosed in Patent Document 2, when a current is passed through the coil 224 of the electromagnet 222, a magnetic path of magnetic flux is formed by the yokes 226a and 226b and the rotating body 228, as shown in FIG. An attractive force is generated under the action of the magnetic flux, and the rotating body 228 is drawn toward the electromagnet 222 by the attractive force.

  In Patent Document 3, as shown in FIG. 46, a plurality of electromagnet devices 234a to 234d are provided via non-magnetic transport bands 230 and 232, and an electromagnet device 234b, Permanent magnet devices 236a and 236b are provided adjacent to 234d. In this case, when one of the electromagnet devices 234a and 234b is energized, the energization of the other electromagnet devices 234c and 234d is stopped. Thereby, the conveyed magnetic body 238 is attracted | sucked by the electromagnet apparatus 234a, 234b which is supplied with electricity.

Japanese Patent Publication No. 52-12982 (Fig. 1) Japanese Patent No. 2630558 (FIG. 3) Japanese Patent Laid-Open No. 55-101514 (FIG. 1)

  In recent years, it has been demanded to increase the sorting speed of articles in the sorting apparatus, and in order to meet this demand, it is necessary to employ an electromagnetic device having a large attractive force to the magnetic material (workpiece).

  However, in the conventional electromagnetic device, even if a magnetic flux is generated by the electromagnet 222 shown in FIG. 46 as in Patent Document 2, for example, a part of the magnetic flux leaks between the yokes 226a and 226b or outside the coil 224. Since the magnetic flux becomes ΦL, there is a problem that even if the magnetic flux generated by the electromagnet 222 is increased, a desired attracting force on the rotating body 228 cannot be obtained.

  In addition, there is a problem that the temperature of the coil 224 rises due to the heat generated when a current is passed through the coil 224, thereby reducing the function of the switching device 220 (electromagnetic device).

  The present invention has been made in consideration of the above-described problems. By sandwiching both sides of a coil surrounding an iron core between two magnetic bodies, leakage magnetic flux is reduced, and heat generated from the coil is reduced by the magnetic body. An object of the present invention is to provide an electromagnetic device capable of efficiently dissipating heat through a heat sink.

  An electromagnetic device according to the present invention includes a plate-shaped first magnetic body, a coil stacked on the first magnetic body, a plate-shaped second magnetic body stacked on the coil, and an inner side of the coil. And an outer peripheral surface of the first magnetic body, the second magnetic body, and the coil is formed substantially flush with the first magnetic body and the second magnetic body, A suction part for sucking / sucking a workpiece under an energizing action on the coil is configured.

  Since the electromagnetic device according to the present invention is composed of a laminated body in which the outer peripheral surfaces of the first magnetic body, the second magnetic body, the iron core and the coil are formed substantially flush with each other, compared with a conventional electromagnetic device. The contact surface between the coil and the first magnetic body and the contact surface between the coil and the second magnetic body can be made large.

  Thereby, the leakage magnetic flux generated from the electromagnetic device can be reduced. Therefore, most of the magnetic flux excited by the coil can be linked to the workpiece via the first magnetic body and the second magnetic body. Therefore, the attractive force with respect to the workpiece can be increased as compared with the conventional electromagnetic device.

  Further, when an electromagnetic device is excited by passing a current through the coil, heat is generated from the coil. This heat is efficiently transmitted from the coil to the first magnetic body and the second magnetic body via the contact surface described above, and the electromagnetic device is operated by using the outer surfaces of the first magnetic body and the second magnetic body as heat dissipation surfaces. Heat is dissipated to the supporting base and external space.

  In this case, since the whole outer surface can be used as a heat radiating surface, a heat radiating area can be increased as compared with a conventional electromagnetic device. Therefore, the heat of the coil can be efficiently radiated through the heat radiating surface, and the temperature rise of the coil can be reduced.

  Thus, the following effect is acquired by the temperature rise of a coil being reduced. First, the function of the electromagnetic device is maintained, and the life of the electromagnetic device can be extended. Further, since the heat of the coil is efficiently radiated from the heat radiating surface of the first magnetic body and the second magnetic body due to the increase of the heat radiation area described above, the heat of the coil is not transmitted to the workpiece, An increase in the temperature of the workpiece can be suppressed. Furthermore, since the temperature rise is reduced as compared with the conventional electromagnetic device, it is possible to further increase the attractive force with respect to the workpiece by flowing a larger current by the reduced temperature difference.

  Moreover, since the electromagnetic device described above is composed of a laminated body of a first magnetic body and a coil, and an iron core and a second magnetic body, the entire electromagnetic device is reduced in size and thickness as compared with a conventional electromagnetic device. Can be achieved.

  Furthermore, since the electromagnetic device described above has a simple configuration of a coil, an iron core, and a magnetic body, the number of parts is small, and processing and assembly can be easily performed. Therefore, the manufacturing cost can be reduced.

  The electromagnetic device according to the present invention includes a plate-shaped first magnetic body, a coil laminated on the first magnetic body, a plate-shaped second magnetic body laminated on the coil, and the coil. An iron core provided on the inner side of the coil and a permanent magnet provided on the inner side or the outer side of the coil, and outer peripheral surfaces of the first magnetic body, the second magnetic body, and the coil are substantially flush with each other. In addition, the first magnetic body and the second magnetic body constitute an attracting portion that attracts / sucks a workpiece under an energizing action on the coil.

  In such a state, when no current is passed through the coil, the magnetic field generated by the permanent magnet is linked only to the iron core and not to the workpiece. Therefore, in a state where no current flows through the coil, no attractive force is generated on the workpiece.

  On the other hand, when a current is passed through the coil, the magnetic flux generated by the current flowing through the coil and the magnetic flux generated by the permanent magnet are linked to the workpiece. Therefore, the attractive force generated under the magnetic action of the magnetic flux by the permanent magnet also becomes the attractive force for the workpiece. Therefore, the suction force with respect to the workpiece can be further increased.

  Further, even when the magnetic flux generated by the current flowing through the coil is reduced, an electromagnetic device with lower heat generation and power saving can be realized by compensating the decrease in the magnetic flux with the magnetic flux generated by the permanent magnet.

  Further, the permanent magnet is provided outside the coil through a slit formed in the first magnetic body or the second magnetic body. In this case, among the magnetic flux generated by the permanent magnet, the magnetic flux interlinking with the iron core and the coil is reduced, and most of the magnetic flux is interlinked with the workpiece via the first magnetic body and the second magnetic body. Thereby, the suction | attraction force with respect to a workpiece | work can further be increased.

  The first magnetic body, the second magnetic body, and the iron core may be formed of silicon steel containing silicon such as a silicon steel sheet having a high resistivity. Thereby, the magnetic field by the eddy current which generate | occur | produces in the direction which prevents the increase in the magnetic flux which generate | occur | produces with the electric current which flows into a coil can be made small. Accordingly, it is possible to improve the rising characteristic of the attractive force with respect to the work when the current is applied to the coil.

  The coil is preferably covered with an insulator such as a resin material. Thereby, electrical insulation with a coil, an iron core, a 1st magnetic body, and a 2nd magnetic body is securable.

  Further, the heat of the coil can be efficiently transmitted to the first magnetic body and the second magnetic body, and can be radiated from the outer surfaces of the first magnetic body and the second magnetic body. Therefore, the temperature rise of the electromagnetic device can be further reduced.

  Moreover, the rigidity of the said coil can be improved by coat | covering a coil with an insulator. Furthermore, since the coil is covered with an insulator, assembly is facilitated, and the manufacturing cost of the electromagnetic device can be further reduced.

  Moreover, since the said conductor is closely arrange | positioned by comprising a coil from a rectangular-shaped conductor, a space factor increases. Thereby, the heat dissipation from the said coil improves and the temperature rise of an electromagnetic device can be reduced. In addition, since the resistance value of the coil decreases due to the increase in the space factor, heat generation from the coil can be reduced.

  In this case, the coil includes at least the first plate coil portion that winds the conductor from the outside toward the outer peripheral surface of the iron core, and the conductor wound to the outer peripheral surface. You may make it comprise from the 2nd plate-shaped coil part wound toward the said outward from a surface. Thereby, compared with the conventional electromagnetic device, the space of the location where a coil is arrange | positioned can be utilized effectively.

  Further, at least one side surface of the suction portion is provided with a flat portion formed in a straight line and a curved portion continuous with the flat portion, and the flat portion is disposed on the upstream side in the moving direction of the workpiece. And you may make it arrange | position the said curved part downstream.

  The workpiece that has moved from the upstream side is first sucked / sucked at the flat portion of the suction portion. Next, the workpiece reaches the curved portion along the flat portion while being sucked / sucked. Then, under the guiding action of the bending portion, the workpiece is sent out in the bending direction of the bending portion.

  In this case, the workpiece feeding direction can be changed by changing the bending direction of the bending portion, which is the workpiece feeding direction, as necessary, that is, by inverting the top and bottom of the electromagnetic device. is there.

  For example, when it is desired to send the workpiece forward to the right side with respect to the moving direction of the workpiece, the electromagnetic device is arranged so that the bending direction of the bending portion is on the right front side with respect to the moving direction of the workpiece. On the other hand, when it is desired to send the workpiece to the front left side with respect to the moving direction of the workpiece, the electromagnetic device is turned upside down and the bending direction of the bending portion is set to the left front with respect to the moving direction of the workpiece. To be.

  Since the electromagnetic device described above can send the workpiece in either the left or right direction, the function of the two types of electromagnetic devices can be obtained simply by using one type of electromagnetic device upside down. Thereby, cost reduction of the various apparatuses using an electromagnetic device is realizable.

  Further, the electromagnetic device may be applied to a sorting conveyor switching device that switches the conveyance path of articles on the conveyor.

  Since the electromagnetic device according to the present invention is composed of the first magnetic body and the coil and the laminated body of the iron core and the second magnetic body, the coil, the first magnetic body, and the A large contact surface with the second magnetic body can be taken.

  Thereby, the leakage magnetic flux which generate | occur | produces from an electromagnetic device can be reduced, and most magnetic flux which generate | occur | produces with the said coil is linked to a workpiece | work via the said 1st magnetic body and the said 2nd magnetic body. Therefore, the attractive force with respect to the workpiece can be increased as compared with the conventional electromagnetic device.

  The heat generated in the coil when a current is passed through the coil is transmitted from the coil to the first magnetic body and the second magnetic body through the contact surface. In this case, since the outer surface of the first magnetic body and the second magnetic body can be used as a heat radiating surface, the heat radiating area can be increased as compared with a conventional electromagnetic device.

  Thereby, the heat transmitted from the coil to the first magnetic body and the second magnetic body can be efficiently radiated to the external space through the heat radiating surface. Therefore, the temperature rise of the coil can be reduced.

  Further, by sandwiching the permanent magnet between the first magnetic body and the second magnetic body, it is possible to further increase the attractive force with respect to the workpiece as compared with the conventional electromagnetic device.

  Preferred embodiments of the electromagnetic device according to the present invention will be described below and described in detail with reference to the accompanying drawings.

  As shown in FIGS. 1 to 4, the electromagnetic device 10 </ b> A according to the first embodiment includes a thin plate-like first magnetic body 12 and a thin wall provided in the central portion of the upper surface of the first magnetic body 12. The plate-shaped iron core 14, the coil 20 wound around the outer peripheral surface of the iron core 14, and the first magnetic body 12 are disposed so as to sandwich the iron core 14 and the coil 20. 2 magnetic body 22.

  The 1st magnetic body 12, the 2nd magnetic body 22, and the iron core 14 are comprised from the silicon steel containing silicon, for example, the silicon steel plate with high resistivity. Further, the first magnetic body 12 and the second magnetic body 22 have the same substantially sword-like shape and the same thickness t1, and are disposed to face each other with the iron core 14 and the coil 20 interposed therebetween.

  The coil 20 is molded by an insulator 30 made of resin. The shape of the outer peripheral surface of the insulator 30 including the coil 20 is substantially the same shape as the outer peripheral surfaces of the first magnetic body 12 and the second magnetic body 22, or forms a relief and the first magnetic body 12 and The shape may be slightly closer to the iron core 14 from the outer peripheral surface of the second magnetic body 22. 1 to 4 show a case where the outer peripheral surface of the insulator 30 including the first magnetic body 12, the second magnetic body 22, and the coil 20 has the same shape.

  In addition, the inner peripheral surface of the insulator 30 is shaped along the iron core 14, and the iron core 14 is disposed inside the insulator 30.

  By molding the coil 20 with the insulator 30, electrical insulation between the coil 20 and the iron core 14, the first magnetic body 12, and the second magnetic body 22 can be ensured.

  Further, the thickness t2 of the insulator 30 is set so that the electromagnetic device 10A, which is a laminated body of the first magnetic body 12, the iron core 14, the insulator 30, and the second magnetic body 22, constitutes the electromagnetic device 10A. The thickness t3 of 10A is preferably a thickness (t3 ≦ t4) such that the thickness t4 of the workpiece 38 is equal to or less than the thickness t4. 1 and 3 show a case where t3 = t4.

  Further, when the electromagnetic device 10A is configured, all the side surfaces of the electromagnetic device 10A are formed substantially flush with each other, and one of the side surfaces has a flat surface portion 24 formed linearly, A curved portion 26 that is continuous with the flat portion 24 and has a predetermined radius of curvature is formed. In this case, the attracting portion 28 is configured by the side surface of the first magnetic body 12 and the side surface of the second magnetic body 22.

  The width t5 of the iron core 14 along the direction orthogonal to the plane portion 24 (the width of the iron core 14 at the position shown in FIG. 3) is the thickness t1 of the first magnetic body 12 and the second magnetic body 22. Are preferably substantially the same as or slightly larger than the thickness t1 (for example, about 20%). Thus, the area S1 of the first magnetic body 12 in the plane portion 24 (area of the encircled portion of the alternate long and short dash line shown in FIG. 1) and the area S2 of the second magnetic body 22 in the plane portion 24 (of the dashed line in FIG. The area of the encircling part) is substantially the same as or slightly larger than the cross-sectional area S3 (the area of the encircling part indicated by the one-dot chain line shown in FIGS. 2 and 4) of the iron core 14 corresponding to the plane part 24. Become.

  As shown in FIG. 5, the coil 20 is configured by winding a plurality of conductors 32 having a flat rectangular cross section along the outer peripheral surface of the iron core 14 (see FIG. 3). Therefore, the space factor (the ratio of the conductor in the coil volume) is higher than that of the coil 36 in which the longitudinal section according to the comparative example shown in FIG. It is understood.

  Next, an example of winding of the coil 20 will be described. As shown in FIG. 7, the coil 20 winds a flat rectangular conductor 32 from the outside toward the outer peripheral surface of the iron core 14, and reaches the outer peripheral surface. It is configured by winding the wound conductor 32 so as to go outward again. Therefore, the space of the coil 20 can be effectively used as the winding portion of the conductor 32.

  The coil 20 includes a first coil portion 20a in which a conductor 32 is wound from the outside toward the outer peripheral surface of the iron core 14, and a second coil portion 20b in which the conductor 32 is wound outward from the outer peripheral surface. It consists of and. However, the number of coil portions described above is not limited to two.

  Specifically, if the coil 20 is configured by starting to wind the conductor 32 from the outer side toward the outer peripheral surface of the iron core 14 and winding the conductor 32 outward from the outer peripheral surface of the iron core 14. Good.

  On the other hand, as shown in FIG. 8, the coil 36 formed by winding the round wire conductor 34 is first wound along the outer peripheral surface of the iron core 14, and on the surface of the wound conductor 34. It is comprised by winding the conductor 34 around. In this case, if the coil 36 is to be incorporated into the electromagnetic device 10 </ b> A (see FIGS. 1 to 4), the space from the outside to the outer peripheral surface of the iron core 14 when starting to wind the conductor 34 is the winding of the coil 36. The inconvenience that it cannot be used as a part occurs.

  Next, the operation of the electromagnetic device 10 </ b> A will be described. As shown in FIG. 9, when a current is passed through the coil 20, a magnetic flux Φ <b> 1 is generated in the iron core 14, and this magnetic flux Φ1 passes from the iron core 14 through the first magnetic body 12. Thus, the magnetic material works in the vicinity of the electromagnetic device 10A. The interlinked magnetic flux Φ1 interlinks with the second magnetic body 22 and reaches the iron core 14. Therefore, the magnetic path 40 is formed in the electromagnetic device 10A and the workpiece 38 by the magnetic flux Φ1.

  At this time, a suction force F is generated from the workpiece 38 toward the suction portion 28 under the magnetic action of the magnetic flux Φ1, and the workpiece 38 is attracted / sucked to the surface of the suction portion 28 by the suction force F. The sucked / sucked work 38 moves along the flat portion 24 and the bending portion 26 (see FIGS. 1 and 2), and eventually the bending direction of the bending portion 26 from the distal end portion of the bending portion 26 (the bending portion 26 is changed). Sent in the direction of the direction).

  On the other hand, in the case of the conventional electromagnetic device 42, as shown in FIG. 10, even if a current is passed through the coil 44 to generate the magnetic flux Φ2, the leakage magnetic flux Φ3 between the yokes 46a and 46b and the periphery of the coil 44 The leakage flux Φ4 causes a disadvantage that the magnetic flux linked to the work 38 is reduced and the attractive force to the work 38 is reduced.

  In the case of the electromagnetic device 10A, as described above, since S1 ≧ S3 and S2 ≧ S3 (see FIGS. 1, 2, and 4), even if the magnetic flux Φ1 increases, the occurrence of magnetic saturation is suppressed. it can. Therefore, the suction force F with respect to the workpiece 38 can be increased.

  On the other hand, in the case of the conventional electromagnetic device 42, as shown in FIG. 10, the magnetic flux interlinked with the workpiece 38 among the magnetic flux Φ2 is greatly reduced by the leakage magnetic fluxes Φ3 and Φ4. Thereby, magnetic saturation occurs in the iron core 46, and there is a disadvantage that the attractive force against the workpiece 38 does not increase.

  Further, the cross-sectional area of the iron core 46 around which the coil 44 is wound is different from the cross-sectional areas of the yokes 46a and 46b. Therefore, since the cross-sectional area changes suddenly at the connection point between the iron core 46 and the yokes 46a and 46b, the magnetic flux density of the magnetic flux Φ2 increases and magnetic saturation occurs. Therefore, even if the current flowing through the coil 44 is increased, there is a disadvantage that the attractive force against the workpiece 38 does not increase due to the magnetic saturation.

  Next, an example in which the electromagnetic device 10A described above is applied to the sorting conveyor system 50 as a sorting conveyor switching device will be described with reference to FIGS.

  The sorting conveyor system 50 includes a slat conveyor 56 having a plurality of shoes 54 movably provided along the axial direction of the plurality of slat bars 52 arranged side by side. The slat conveyor 56 circulates along the main line direction (arrow A direction) under the driving action of a driving means (not shown), and the article 60 is branched from the main line conveyance path 58 (arrow B direction). And a branch conveyance path 62 that conveys along

  A main rail 64 and a branch rail 66 are provided along the main line direction (arrow A direction) and the branch direction (arrow B direction) on the lower side of the transfer surface of the main line transfer path 58 and the branch transfer path 62 of the slat conveyor 56, respectively. An electromagnetic device 10A, which is a sorting conveyor switching device, is attached to a portion where the main rail 64 and the branch rail 66 are branched and sort the articles 60.

  The planar portion 24 and the bending portion 26 constituting the electromagnetic device 10A are fixed along the groove portion 70 to a notched portion of the branch rail 66 branching from the groove portion 68 of the main rail 64, and a shoe 54 is attached to the groove portion 70. A sliding member 72 is slidably connected to the bottom surface portion and moves integrally with the shoe 54.

  In this case, the planar portion 24 of the electromagnetic device 10A is disposed on the upstream side of the main rail 64, the curved portion 26 of the electromagnetic device 10A is on the downstream side of the main rail 64, and the branch rail 66 branches from the main rail 64. Placed in place. The sliding member 72 is made of a magnetic material.

  Next, in the sorting conveyor system 50, the case where the conveyance path of the articles 60 conveyed along the main line direction is switched to the branch direction and the articles 60 are conveyed along the branch conveyance path 62 will be described.

  A magnetic flux Φ1 is generated in the iron core 14 by energizing the coil 20 of the electromagnetic device 10A (see FIG. 9) based on a switching signal output from a controller (not shown). The magnetic flux Φ1 is linked to the sliding member 72 via the first magnetic body 12 and the second magnetic body 22. An attractive force F against the sliding member 72 is generated under the magnetic action of the magnetic flux Φ1, and the sliding member 72 is attracted to the suction portion 28 by the attractive force F.

  Accordingly, the sliding member 72 is attracted by the suction portion 28 composed of the first magnetic body 12 and the second magnetic body 22, and the sliding member 72 is moved toward the branch rail 66 along the flat portion 24 and the curved portion 26. Led. Further, the sliding member 72 made of a magnetic material is adsorbed by the flat portion 24 and the bending portion 26, so that the sliding member 72 moves along the groove portion 70 of the branch rail 66 branched from the main rail 64 (see FIG. 12).

  At this time, as shown in FIG. 11, the shoe 54 connected to the sliding member 72 moves along the slat rod 52, so that the article 60 on the slat conveyor 56 is separated from the main conveyance path 58 to the branch conveyance path. The articles 60 are sent in 62 directions, and the articles 60 are sorted.

  In the example shown in FIG. 12, the sliding member 72 is guided in the branch direction (arrow B direction) toward the left front with respect to the main line direction (arrow A direction) that is the moving direction of the sliding member 72. Sorting is done.

  Such sorting is not limited to the direction of arrow B, and the sorting direction of the article 60 can be changed by arranging the electromagnetic device 10A with the top and bottom of the electromagnetic device 10A reversed.

  As an example, FIG. 13 shows a case where the articles 60 are sorted with the direction toward the right front as the branching direction (arrow C direction) with respect to the moving direction of the sliding member 72. As shown in FIG. 13, the planar portion 24 and the curved portion 26 of the electromagnetic device 10 </ b> A are disposed along the main rail 64 and the branch rail 74 branched from the main rail 64 in the direction of arrow C.

  In this case, the electromagnetic device 10A is a branch that branches in the direction of arrow C from the groove 76 on the right side in the main line direction (arrow A direction) of the main rail 64 in a state where the electromagnetic device 10A shown in FIG. It is fixed along the groove 78 in the notched portion of the rail 74.

  Therefore, based on a switching signal output from a controller (not shown), the sliding member is energized by the adsorption portion 28 under the action of the magnetic flux Φ1 generated in the iron core 14 by energizing the coil 20 of the electromagnetic device 10A shown in FIG. 72 is aspirated. The sucked sliding member 72 is guided to the branch rail 74 side along the flat portion 24 and the curved portion 26. Further, the sliding member 72 made of a magnetic material is adsorbed by the flat portion 24 and the bending portion 26, so that the sliding member 72 moves along the groove portion 78 of the branch rail 74 branched from the main rail 64.

  At that time, the shoe 54 connected to the sliding member 72 moves along the slat rod 52, so that the article 60 on the slat conveyor 56 moves from the main line conveyance path 58 to a branch conveyance path (not shown) in the direction of arrow C. Then, the articles 60 are sorted (see FIG. 11).

  Here, some simulation results (first to third analysis examples) will be described with reference to FIGS.

  The first analysis example includes an electromagnetic device 10A (Example 1) shown in FIG. 3, a conventional electromagnetic device 80 (Comparative Example 1) shown in FIG. 14, and a conventional electromagnetic device 82 (Comparative Example 2) shown in FIG. ), The relationship between the magnetic flux distribution and the magnetic flux density distribution when current is passed through the coil to generate magnetic flux is investigated.

  As shown in FIG. 14, the electromagnetic device 80 of Comparative Example 1 has a coil along the longitudinal direction of the workpiece 38 (direction in which the workpiece 38 is attracted) with respect to a part of the yoke 84 formed in a substantially U shape. 86 is arranged. Further, as shown in FIG. 15, the electromagnetic device 82 of Comparative Example 2 has a coil 90 disposed along a direction perpendicular to the attracting direction of the workpiece 38 with respect to a part of the yoke 88 formed in a substantially J shape. It is arranged.

  As a simulation condition in the first analysis example, the magnetomotive force at the time of exciting by applying a current to the coil is set to 1000 (A). Further, the first magnetic body 12, the iron core 14, the second magnetic body 22, the work 38, and the yokes 84 and 88 are non-linear magnetic materials (steel material: equivalent to SS400).

  The two-dimensional finite element method (FEM) and the boundary element method (BEM) are used in a state where the distance (gap d) between the workpiece 38 and the attracting portion 28 of the electromagnetic devices 10A, 80, 82 is set to 1 mm. And simulated.

  FIG. 16 shows the magnetic flux distribution of the first embodiment, and FIG. 17 shows the magnetic flux density distribution of the first embodiment. 18 shows the magnetic flux distribution of Comparative Example 1, and FIG. 19 shows the magnetic flux density distribution of Comparative Example 1. 20 shows the magnetic flux distribution of Comparative Example 2, and FIG. 21 shows the magnetic flux density distribution of Comparative Example 2.

  In the magnetic flux density distribution, the magnitude of the magnetic flux density is displayed in three stages. In this case, the thicker the shaded portion is displayed, the greater the magnetic flux density.

  In Example 1, it was found that about 72% of the magnetic flux generated from the coil 20 was linked to the workpiece 38.

  On the other hand, in Comparative Example 1, only about 30% of the magnetic flux generated by the coil 86 is linked to the workpiece 38. In Comparative Example 2, only about 26% of the magnetic flux generated in the coil 90 is linked to the workpiece 38.

  As described above, compared to Comparative Examples 1 and 2, in Example 1, the magnetic flux generated from the coil 20 can be efficiently linked to the workpiece 38. That is, since the electromagnetic device 10A has less leakage magnetic flux than the conventional electromagnetic devices 80 and 82, the magnetic flux Φ1 generated in the coil 20 can be reduced. Therefore, the electromagnetic device 10A has a large magnetic flux interlinking with the workpiece 38 and a small inductance.

  Therefore, if the magnetic flux of the level shown in Comparative Examples 1 and 2 is linked to the workpiece 38, in the case of Example 1, the current passed through the coil 20 so as to reduce the magnetic flux generated in the iron core 14 by about 70%. Should be reduced.

  The above-described goal can also be achieved by reducing the magnetic flux linked to the workpiece 38 by reducing the size of the first magnetic body 12 and the second magnetic body 22.

  Thus, in Example 1, compared with Comparative Examples 1 and 2, the electromagnetic device 10A can be excited using a small-capacity power source.

  Next, a second analysis example will be described with reference to FIG. In this analysis example, the relationship between the suction force with respect to the workpiece 38 when the gap d is changed is examined for Example 1 and Comparative Examples 1 and 2. In this case, the simulation conditions are the same as those in the first analysis example except that the gap d changes.

  When Example 1 is compared with Comparative Examples 1 and 2 with respect to the magnitude of the suction force in the same gap d, it can be understood that the suction force of Example 1 is higher than the suction force of Comparative Examples 1 and 2. For example, when the gap d is 1 (mm), the suction force in Example 1 is 1581 (N), whereas in Comparative Example 1, it is 724 (N), and in Comparative Example 2 is 527 (N). there were. This is considered to be because in Comparative Examples 1 and 2, the attractive force against the workpiece 38 does not increase so much due to the occurrence of magnetic saturation.

  From this result, it is clear that Example 1 can reliably suck / suck the workpiece 38 as compared with Comparative Examples 1 and 2.

  Next, a third analysis example will be described with reference to FIG. In this analysis example, the relationship between the attractive force with respect to the workpiece 38 when the magnetomotive force is changed is examined for Example 1 and Comparative Examples 1 and 2. In this case, the simulation conditions are the same as those in the first analysis example except that the magnetomotive force is changed. The magnetomotive force was changed by changing the current flowing through the coils 20, 86, 90 in a state where the number of turns of the coils 20, 86, 90 was set to 100 (turn), for example.

  Comparing Example 1 and Comparative Examples 1 and 2 with respect to the magnitude of the attractive force at the same magnetomotive force, it can be seen that the attractive force of Example 1 is higher than that of Comparative Examples 1 and 2. For example, when the magnetomotive force is 1000 (A), the attractive force in Example 1 is 1581 (N), whereas in Comparative Example 1, it is 724 (N), and in Comparative Example 2 is 527 (N). there were. Also in this case, in Comparative Examples 1 and 2, it is considered that the attractive force against the workpiece 38 does not increase so much due to the occurrence of magnetic saturation.

  Also from this result, it is clear that Example 1 can reliably suck / suck the workpiece 38 as compared with Comparative Examples 1 and 2.

  As described above, the electromagnetic device 10 </ b> A according to the first embodiment includes the laminated body of the first magnetic body 12, the iron core 14, the coil 20, and the second magnetic body 22. Therefore, compared with the conventional electromagnetic device, the contact surface between the coil 20 and the first magnetic body 12 and the contact surface between the coil 20 and the second magnetic body 22 can be made larger.

  Thereby, the leakage magnetic flux generated from the electromagnetic device 10A can be reduced. Therefore, the magnetic flux Φ1 generated in the iron core 14 when the current is passed through the coil 20 to excite the electromagnetic device 10A is reliably linked to the workpiece 38 via the first magnetic body 12 and the second magnetic body 22. Therefore, the attractive force with respect to the workpiece 38 can be increased as compared with the conventional electromagnetic device.

  Moreover, since the 1st magnetic body 12, the 2nd magnetic body 22, and the iron core 14 are comprised from the silicon steel plate with high resistivity, it is based on the eddy current generated in the direction which prevents the increase in magnetic flux (PHI) 1 with the electric current which flows into the coil 20. The magnetic field can be reduced. Therefore, the rising characteristic of the attractive force when a current is applied to the coil 20 is improved, and the attractive force F with respect to the workpiece 38 can be generated in a short time.

  Further, when the electromagnetic device 10 </ b> A is excited by passing a current through the coil 20, heat is generated from the coil 20. The heat is efficiently transferred from the coil 20 to the first magnetic body 12 and the second magnetic body 22 through the contact surface described above. The heat is radiated to a frame (not shown) or an external space that supports the electromagnetic device 10A with the outer surfaces of the first magnetic body 12 and the second magnetic body 22 as heat radiation surfaces.

  In this case, since the entire outer surface can be used as a heat radiating surface, the heat radiating area can be increased as compared with a conventional electromagnetic device. Therefore, the heat of the coil 20 can be efficiently radiated to the external space via the heat radiating surface, and the temperature rise of the coil 20 can be reduced.

  The following effects are acquired by suppressing the temperature rise of the coil 20.

  First, the function of the electromagnetic device 10A is maintained, and the life of the electromagnetic device 10A can be extended. Further, since the heat of the coil 20 is efficiently radiated from the heat radiation surfaces of the first magnetic body 12 and the second magnetic body 22 due to the increase in the heat radiation area described above, the heat of the coil 20 is transmitted to the work 38. There is nothing. Therefore, the temperature rise of the workpiece 38 can be suppressed. Further, since the temperature rise is reduced as compared with the conventional electromagnetic device, it is possible to further increase the attractive force with respect to the workpiece 38 by causing a larger current to flow by the reduced temperature difference.

  As described above, since the electromagnetic device 10A is composed of a laminated body, the entire electromagnetic device 10A can be reduced in size and thickness as compared with a conventional electromagnetic device.

  Furthermore, since the electromagnetic device 10A has a simple structure including the first magnetic body 12, the iron core 14, the coil 20, and the second magnetic body 22, the number of parts is small and can be easily processed and assembled. Therefore, the manufacturing cost can be reduced.

  In addition, since the coil 20 is molded by the insulator 30, the heat generated from the coil 20 is efficiently transmitted to the first magnetic body 12 and the second magnetic body 22 through the insulator 30 to dissipate heat. be able to. Therefore, the temperature rise of the entire electromagnetic device 10A can be further reduced. In addition, the rigidity of the coil 20 can be improved by molding the coil 20 with the insulator 30. Furthermore, by molding with the insulator 30, the assembly of the electromagnetic device 10A becomes easy, and the manufacturing cost of the electromagnetic device 10A can be further reduced.

  Further, the first magnetic body 12 and the second magnetic body 22 are bonded to the molded coil 20 with an adhesive having a high thermal conductivity, whereby the first magnetic body 12 and the second magnetic body 22 are bonded. Thermal conductivity is improved, and heat generated from the coil 20 can be efficiently transmitted to the first magnetic body 12 and the second magnetic body 22.

  Further, by configuring the coil 20 from the rectangular conductor 32, the conductor 32 is closely arranged, and the space factor increases. Thereby, the heat dissipation from the coil 20 improves and the temperature rise of the electromagnetic device 10A whole can be reduced. In addition, since the resistance value of the coil 20 decreases due to the increase in the space factor, heat generation from the coil 20 can be reduced.

  In addition, in the electromagnetic device 10A, as shown in FIGS. 24 and 25, an auxiliary suction portion 92 made of a permanent magnet or an electromagnet may be provided along the suction portion 28. The auxiliary suction unit 92 may be disposed adjacent to the suction unit 28 as shown in FIG. 24, or may be built in the electromagnetic device 10A as shown in FIG. And the auxiliary adsorption | suction part 92 is provided in the upstream of the moving direction of the sliding member 72 among 10 A of electromagnetic devices.

  Then, the sliding member 72 moving in the arrow A direction is sucked toward the groove portion 70 by the auxiliary suction portion 92. Thereby, the sliding member 72 moves to the suction portion 28 in a state where the distance from the auxiliary suction portion 92 is reduced. Therefore, in the suction part 28, the sliding member 72 can be reliably sucked / sucked, and the sliding member 72 can be sorted efficiently.

  Next, an electromagnetic device 10B according to a second embodiment will be described with reference to FIGS. In addition, about the component same as 10 A of electromagnetic devices, the same referential mark is attached | subjected and demonstrated.

  The electromagnetic device 10 </ b> B is the same as the electromagnetic device 10 </ b> A except that a permanent magnet is disposed adjacent to the coil 20.

  Next, the electromagnetic devices 100, 104, and 108 according to a specific example of the electromagnetic device 10B will be described.

  In the electromagnetic device 100 according to the first specific example shown in FIG. 26, a permanent magnet 102 is provided on the opposite side of the attracting portion 28 on the outer peripheral surface of the coil 20, and the iron core 14, the coil 20, and the permanent magnet 102 are It is sandwiched between the first magnetic body 12 and the second magnetic body 22.

  In the electromagnetic device 104 according to the second specific example shown in FIG. 27, the iron core 14 is disposed at a location near the attracting portion 28 inside the insulator 30, and adjacent to the iron core 14 at a location away from the attracting portion 28. The permanent magnet 106 is disposed. In such a state, the outer peripheral surfaces thereof are surrounded by the coil 20, and the iron core 14, the permanent magnet 106, and the coil 20 are sandwiched between the first magnetic body 12 and the second magnetic body 22.

  In the electromagnetic device 100, when no current is passed through the coil 20, the magnetic flux Φ 5 generated by the permanent magnet 102 is chained to the iron core 14 via the first magnetic body 12 and the second magnetic body 22 as shown in FIG. Interact. Therefore, the magnetic flux Φ5 does not leak to the outside of the electromagnetic devices 100 and 104 (for example, the workpiece 38).

  On the other hand, when excitation is performed by passing a current through the coil 20, the magnetic flux Φ5 cannot enter the iron core 14 due to the magnetic flux Φ1 generated in the iron core 14, as shown in FIG. And the work 38 is linked via the second magnetic body 22. Also, the magnetic flux Φ1 is linked to the workpiece 38 via the first magnetic body 12 and the second magnetic body 22. Thus, since the magnetic flux linked to the workpiece 38 is increased by the magnetic flux Φ5, the attractive force with respect to the workpiece 38 is also increased.

  Also in the electromagnetic device 104, as shown in FIG. 27, when no current is passed through the coil 20, the magnetic flux Φ5 generated by the permanent magnet 106 is transmitted through the first magnetic body 12 and the second magnetic body 22 to the iron core. 14 (dotted line loop in FIG. 27). Therefore, the magnetic flux Φ5 does not leak to the outside of the electromagnetic device 104 (for example, the workpiece 38).

  On the other hand, when excitation is performed by passing a current through the coil 20, the magnetic flux Φ 5 cannot enter the iron core 14 due to the magnetic flux Φ 1 generated in the iron core 14, and the first magnetic body 12 and the second magnetic body 22 are connected. To the workpiece 38 (solid-line loop in FIG. 27). Also, the magnetic flux Φ1 is linked to the workpiece 38 via the first magnetic body 12 and the second magnetic body 22. Thus, also in the electromagnetic device 104, since the magnetic flux linked to the workpiece 38 by the magnetic flux Φ5 increases, the attractive force with respect to the workpiece 38 also increases.

  In the electromagnetic device 108 according to the third specific example shown in FIG. 29, two permanent magnets 110a and 110b are disposed outside the coil 20, and are sandwiched between the first magnetic body 12 and the second magnetic body 22, and further, A slit 112a is formed between the coil 20 and the permanent magnet 110a, and a slit 112b is formed between the coil 20 and the permanent magnet 110b.

  In this case, the magnetic flux generated by the permanent magnet 110a and the magnetic flux generated by the permanent magnet 110b are difficult to interlink with the iron core 14 and the coil 20 due to the presence of the slits 112a and 112b. Therefore, the magnetic flux interlinks with the workpiece 38 (see FIG. 1) that moves along the attracting portion 28 via the first magnetic body 12 and the second magnetic body 22. As a result, the workpiece 38 always receives an attractive force in the vicinity of the electromagnetic device 108.

  Next, various simulation results (fourth to eighth analysis examples) regarding the electromagnetic device 10 </ b> B will be described with reference to FIGS. 30 to 43.

  First, in a fourth analysis example, a magnetic flux is generated by passing a current through a coil for the electromagnetic device 104 (Example 2) shown in FIG. 27 and the electromagnetic device 100 (Example 3) shown in FIGS. The relationship between the magnetic flux distribution and the magnetic flux density distribution was investigated. In this case, the simulation conditions are the same as those in the first embodiment (see FIGS. 16 and 17) in the first analysis example.

  FIG. 30 shows the magnetic flux distribution of the second embodiment, and FIG. 31 shows the magnetic flux density distribution of the second embodiment. FIG. 32 shows the magnetic flux distribution of the third embodiment, and FIG. 33 shows the magnetic flux density distribution of the third embodiment.

  In Examples 2 and 3, it can be understood that the magnetic flux generated by the permanent magnets 102 and 106 is linked to the workpiece 38.

  Next, a fifth analysis example will be described with reference to FIG. In this analysis example, the relationship of the attractive force with respect to the workpiece 38 when the magnetomotive force is changed is examined for the second embodiment. In this case, the simulation conditions are the same as in the third analysis example (see FIG. 23). FIG. 34 also shows the simulation results of Example 1 for comparison.

  As in the second embodiment, it can be seen that the provision of the permanent magnet 106 further increases the attractive force with respect to the workpiece 38. For example, when the current flowing through the coil 20 is 3000 (A), the attractive force with respect to the workpiece 38 is increased by about 15% in the second embodiment as compared with the first embodiment in which no permanent magnet is provided.

  Next, a sixth analysis example will be described with reference to FIG. In this analysis example, the relationship between the suction force with respect to the workpiece 38 when the gap d is changed in the second and third embodiments is examined. In this case, the simulation conditions are the same as in the second analysis example (see FIG. 22). Note that FIG. 35 also shows the simulation results of Example 1 for comparison.

  Regarding Examples 2 and 3, it can be appreciated that the provision of the permanent magnets 102 and 106 increases the attractive force with respect to the workpiece 38. For example, when the gap d is 1 (mm), the attractive force is increased by about 5% in Examples 2 and 3 as compared with Example 1 that does not include a permanent magnet.

  Next, a seventh analysis example will be described with reference to FIGS. In this analysis example, the electromagnetic device 104 (Example 4) and the electromagnetic device 100 (Example 5) are examined for the relationship between the magnetic flux distribution and the magnetic flux density distribution when no current is passed through the coil 20. In the eighth analysis example, the simulation conditions of Examples 4 and 5 are the same as those in the fourth analysis example (see FIGS. 30 to 33) except that the magnitude of the magnetomotive force is set to 0. It is.

  FIG. 36 shows the magnetic flux distribution of the fourth embodiment, and FIG. 37 shows the magnetic flux density distribution of the fourth embodiment. FIG. 38 shows the magnetic flux distribution of the fifth embodiment, and FIG. 39 shows the magnetic flux density distribution of the fifth embodiment.

  From the simulation results of FIGS. 36 and 37, in Example 4, the magnetic flux generated by the permanent magnet 106 is linked to the iron core 14 via the first magnetic body 12 and the second magnetic body 22, and the magnetic flux is the workpiece 38. It is easily understood that there is no linkage. It can also be seen that the magnetic flux density is concentrated between the iron core 14 and the permanent magnet 106.

  38 and 39, the magnetic flux generated by the permanent magnet 102 is linked to the iron core 14 via the first magnetic body 12 and the second magnetic body 22 in Example 5, and the magnetic flux is It can be easily understood that the workpiece 38 is not interlinked. It can also be seen that the magnetic flux density is intensively generated between the iron core 14 and the permanent magnet 102.

  Next, an eighth analysis example will be described with reference to FIGS. This analysis example shows a magnetic flux distribution and a magnetic flux density distribution when a large magnetomotive force is generated by flowing a larger current through the coil 20 for the electromagnetic device 10A (Example 6) and the electromagnetic device 104 (Example 7). The relationship between In the eighth analysis example, the simulation conditions of Examples 6 and 7 are the fourth analysis example (FIGS. 30 to 33) except that the magnitude of the magnetomotive force is set to 2000 (A). It is the same.

  FIG. 40 shows the magnetic flux distribution of the sixth embodiment, and FIG. 41 shows the magnetic flux density distribution of the sixth embodiment. FIG. 42 shows the magnetic flux distribution of the seventh embodiment, and FIG. 43 shows the magnetic flux density distribution of the seventh embodiment.

  From the simulation results of FIGS. 40 and 41, in Example 6, even if the magnetomotive force is increased, the magnetic flux generated by the current flowing through the iron core 14 is transmitted through the first magnetic body 12 and the second magnetic body 22. It is easily understood that they are interlinked.

  42 and 43, in Example 7, in addition to the magnetic flux generated in the iron core 14, the magnetic flux generated in the permanent magnet 102 is also passed through the first magnetic body 12 and the second magnetic body 22 in Example 7. It can be easily understood that the workpiece 38 is interlinked.

  Thus, in the electromagnetic device 10B according to the second embodiment, the first magnetic body 12 and the second magnetic body 22 are provided between the outer peripheral surface of the iron core 14 and the coil 20 or on the outer peripheral surface of the coil 20. Permanent magnets 102 and 106 are provided so as to be sandwiched between the two.

  In this case, when no current is supplied to the coil 20, the magnetic flux generated by the permanent magnets 102 and 106 passes only through the iron core 14 and does not link to the workpiece 38. Therefore, in a state where no current flows through the coil 20, no attractive force is generated against the workpiece 38 due to the action of the permanent magnets 102 and 106.

  On the other hand, when a current is passed through the coil 20, the magnetic flux generated by excitation and the magnetic flux generated by the permanent magnets 102 and 106 are linked to the workpiece 38. Therefore, the attractive force generated under the magnetic action of the magnetic flux generated by the permanent magnets 102 and 106 also becomes the attractive force for the workpiece 38. Therefore, the suction force with respect to the workpiece 38 can be further increased.

  Further, by reducing the generated magnetic flux and compensating the decrease in the magnetic flux with the magnetic flux generated by the permanent magnets 102 and 106, the electromagnetic devices 100 and 104 with lower heat generation and power saving can be realized.

  Further, when the permanent magnets 110 a and 100 b are provided outside the coil 20, the permanent magnets 110 a and 110 b are connected via the slits 112 a and 112 b provided between the first magnetic body 12 and the second magnetic body 22. By disposing the coil 20 on the outside of the coil 20, the magnetic flux linked to the iron core 14 and the coil 20 from the permanent magnets 110a and 110b is reduced. Therefore, most of the magnetic flux generated by the permanent magnets 110 a and 110 b is linked to the workpiece 38 via the first magnetic body 12 and the second magnetic body 22.

  In this case, the permanent magnet 110a disposed near the flat surface portion 24 can surely attract / adsorb the workpiece 38 to the flat surface portion 24 side. Further, the permanent magnet 110b disposed near the bending portion 26 reliably sends out the workpiece 38 in the direction (sorting direction) directed to the bending portion 26 while attracting / sucking the workpiece 38 toward the bending portion 26 side. be able to.

  In addition, the electromagnetic device according to the present invention is not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

1 is a perspective view of an electromagnetic device according to a first embodiment. It is a top view of the electromagnetic device of FIG. It is a longitudinal cross-sectional view along the III-III line of FIG. It is a perspective view of the coil in the electromagnetic device of FIG. It is a longitudinal cross-sectional view along the VV line of FIG. It is a longitudinal cross-sectional view which shows the winding state of the coil which concerns on a comparative example. It is a perspective view which shows the winding state of the coil in the electromagnetic device of FIG. It is a perspective view which shows the winding state of the coil in the conventional electromagnetic device. It is the longitudinal cross-sectional view along the IX-IX line of FIG. It is a longitudinal cross-sectional view of the conventional electromagnetic device. It is a principal part perspective view of the sorting conveyor system incorporating the electromagnetic device of FIG. It is a partial cross section top view of the sorting part of the sorting conveyor system of FIG. It is the partial cross section top view which deform | transformed the sorting part of the sorting conveyor system of FIG. 5 is a longitudinal sectional view of an electromagnetic device according to Comparative Example 1. FIG. It is a longitudinal cross-sectional view of the electromagnetic device which concerns on the comparative example 2. FIG. 3 is an explanatory diagram showing a magnetic flux distribution of Example 1. 3 is an explanatory diagram showing a magnetic flux density distribution of Example 1. FIG. 6 is an explanatory diagram showing a magnetic flux distribution of Comparative Example 1. FIG. 6 is an explanatory diagram showing a magnetic flux density distribution of Comparative Example 1. FIG. 6 is an explanatory diagram showing a magnetic flux distribution of Comparative Example 2. FIG. 6 is an explanatory diagram showing a magnetic flux density distribution of Comparative Example 2. FIG. It is explanatory drawing which shows the attraction | suction force with respect to a workpiece | work. It is explanatory drawing which shows the attraction | suction force with respect to a workpiece | work. It is a top view of the electromagnetic device which concerns on the modification of 1st Embodiment. It is a top view of the electromagnetic device which concerns on the modification of 1st Embodiment. It is a longitudinal cross-sectional view of the electromagnetic device which concerns on a 1st specific example. It is a longitudinal cross-sectional view of the electromagnetic device which concerns on a 2nd specific example. It is a longitudinal cross-sectional view which shows the magnetic flux which generate | occur | produces with the electromagnetic device of FIG. It is a longitudinal cross-sectional view of the electromagnetic device which concerns on a 3rd example. It is explanatory drawing which shows magnetic flux distribution of Example 2. FIG. 6 is an explanatory diagram showing a magnetic flux density distribution of Example 2. FIG. 6 is an explanatory diagram showing magnetic flux distribution of Example 3. FIG. 6 is an explanatory diagram showing a magnetic flux density distribution of Example 3. FIG. It is explanatory drawing which shows the attraction | suction force with respect to a workpiece | work. It is explanatory drawing which shows the attraction | suction force with respect to a workpiece | work. It is explanatory drawing which shows magnetic flux distribution of Example 4. It is explanatory drawing which shows magnetic flux density distribution of Example 4. It is explanatory drawing which shows magnetic flux distribution of Example 5. FIG. FIG. 10 is an explanatory diagram showing a magnetic flux density distribution of Example 5. It is explanatory drawing which shows magnetic flux distribution of Example 6. FIG. It is explanatory drawing which shows magnetic flux density distribution of Example 6. FIG. 10 is an explanatory diagram showing a magnetic flux distribution of Example 7. FIG. FIG. 10 is an explanatory diagram showing a magnetic flux density distribution of Example 7. It is a top view of the distribution apparatus which concerns on a prior art. It is a side view of the switching apparatus which concerns on a prior art. It is a top view of the sorting apparatus which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10A, 10B ... Electromagnetic device 12, 22 ... Magnetic body 14 ... Iron core 20 ... Coil 20a, 20b ... Coil part 24 ... Plane part 26 ... Curve part 28 ... Adsorption part 30 ... Insulator 32 ... Conductor 38 ... Work piece 40 ... Magnetic path

Claims (10)

A plate-like first magnetic body;
A coil laminated on the first magnetic body;
A plate-like second magnetic body laminated on the coil;
An iron core provided inside the coil;
Provided on the first magnetic body on the upstream side or the downstream side in the moving direction of the workpiece with respect to the coil, and sandwiched between the first magnetic body and the second magnetic body together with the coil and the iron core. With a permanent magnet,
With
On the first magnetic body, by winding a plurality of the coils along the outer peripheral surface of the first magnetic body, among the outer peripheral surfaces of the first magnetic body, the second magnetic body, and the coil, The side surface facing the workpiece is formed substantially flush,
An electromagnetic device characterized in that each side surface of the first magnetic body and the second magnetic body formed substantially flush with each other constitutes a suction portion that sucks / sucks the workpiece under an energizing action on the coil. . The electromagnetic device according to claim 1.
The said permanent magnet is provided in the upstream or downstream of the said moving direction with respect to the said coil through the slit formed in the said 1st magnetic body or the said 2nd magnetic body. The electromagnetic device characterized by the above-mentioned. The electromagnetic device according to claim 1 or 2,
The first magnetic body, the second magnetic body, and the iron core are made of silicon steel containing silicon. The electromagnetic device according to any one of claims 1 to 3,
The electromagnetic device, wherein the coil is covered with an insulator. The electromagnetic device according to any one of claims 1 to 4,
The said coil is comprised from the rectangular conductor, The electromagnetic device characterized by the above-mentioned. The electromagnetic device according to claim 5.
The coil includes at least a first plate-like coil portion that winds the conductor from the outside toward the outer peripheral surface of the iron core, and the conductor wound to the outer peripheral surface. An electromagnetic device comprising: a second plate coil portion wound outwardly from a surface. The electromagnetic device according to any one of claims 1 to 6,
The adsorbing part is constituted by a flat part formed linearly and a curved part continuous to the flat part,
The electromagnetic device, wherein the planar portion is arranged on the upstream side in the moving direction of the workpiece, and the bending portion is arranged on the downstream side. The electromagnetic device according to claim 7.
The electromagnetic device is characterized in that the workpiece feeding direction can be changed by arranging the electromagnetic device upside down. The electromagnetic device according to claim 7 or 8 ,
The area of the side surface of the first magnetic body in the plane portion is S1, the area of the side surface of the second magnetic body in the plane portion is S2, and the plane portion in the portion corresponding to the plane portion in the iron core When the cross-sectional area along the orthogonal direction is S3,
Between the area S1, the area S2, and the cross-sectional area S3, S1 ≧ S3 and S2 ≧ S3. The electromagnetic device according to any one of claims 1 to 9 ,
The electromagnetic device is applied to a sorting conveyor switching device that switches a conveyance path of articles on a conveyor.

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