JP5019278B2 - Work suction device - Google Patents

Description

  The present invention relates to a workpiece attracting device that attracts a workpiece including a magnetic material by magnetic flux from a magnet.

  2. Description of the Related Art Conventionally, work suction devices that sort articles (workpieces) containing a magnetic material under the action of magnetic flux generated from an electromagnet and a permanent magnet have been widely adopted, and an example thereof is disclosed in Patent Document 1.

  In the electromagnetic device 100 as a workpiece attraction device disclosed in Patent Document 1, as shown in FIG. 12, an article made of a magnetic material in which a plurality of electromagnets 106a to 106d are arranged along the nonmagnetic transport bands 102 and 104. Permanent magnets 108a and 108b are respectively arranged adjacent to the electromagnets 106b and 106d on the downstream side of the conveyance direction 110 (the direction from the left side to the right side in FIG. 9). Here, when the detection devices 112a and 112b detect the article 110 conveyed along the nonmagnetic conveyance band 102, a power source (not shown) energizes the electromagnets 106a and 106b based on the detection results of the detection devices 112a and 112b. On the other hand, energization to the electromagnets 106c and 106d is stopped. As a result, the article 110 is orbitally changed to the non-magnetic transport band 102 side by the attraction force due to the magnetic flux from the electromagnets 106a and 106b, and then the attraction force due to the magnetic flux from the electromagnets 106a and 106b and the permanent magnet 108a. While being received, it is transported downstream of the non-magnetic transport belt 102.

JP-A-55-101514

  As shown in FIG. 12, in the electromagnetic device 100 according to the prior art, the electromagnet 106a, the electromagnet 106b, and the permanent magnet 108a are arranged apart from each other along the nonmagnetic transport band 102, while the electromagnet 106c and the electromagnet 106d. And the permanent magnets 108b are arranged along the nonmagnetic transport band 104 so as to be separated from each other. As a result, it is possible to prevent the magnetic flux linkage from the permanent magnets 108a and 108b to the yokes of the electromagnets 106a to 106d and the magnetic flux linkage from the electromagnets 106a to 106d to the yokes of the other electromagnets 106a to 106d. .

  However, when the article 110 is transported along the nonmagnetic transport belts 102 and 104, as described above, between the electromagnet 106a and the electromagnet 106b, between the electromagnet 106b and the permanent magnet 108a, and between the electromagnet 106c and the electromagnet 106d. The attractive force with respect to the article 110 between the electromagnet 106d and the permanent magnet 108b is locally reduced, and as a result, it is difficult to accurately sort and convey the article 110 downstream.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a workpiece suction device capable of preventing a local decrease in the suction force with respect to the workpiece.

A workpiece attracting apparatus according to the present invention includes a first magnet unit capable of attracting a workpiece, and a second magnet unit disposed away from the first magnet unit and capable of attracting the workpiece, wherein the first magnet The portion includes a first magnetic body, a first magnet laminated on the first magnetic body, and a second magnetic body laminated on the first magnet. A third magnetic body, a second magnet stacked on the third magnetic body, and a fourth magnetic body stacked on the second magnet, the second magnet portion side of the first magnetic body A first protrusion toward the third magnetic body is formed to protrude from the outer peripheral surface of the second magnetic body, and a second protrusion toward the fourth magnetic body is formed on the outer peripheral surface of the second magnetic body on the second magnet portion side. A third protrusion toward the first magnetic body is formed on the outer peripheral surface of the third magnetic body on the first magnet portion side. Is, the fourth on the outer circumferential surface of the first magnet portion side of the magnetic body, the second fourth protrusion toward the magnetic body is protruded, and the first protrusion and the third protrusion is viewed from the side in overlap staggered through gap, wherein the second protrusion and the fourth protrusion, characterized that you have overlapping staggered through the gaps in a side view.

  According to the configuration described above, a part of the magnetic flux from the first and second magnets is formed by forming the first to fourth protrusions in the space between the first magnet part and the second magnet part. Passes through the first to fourth protrusions and is linked to the workpiece in the vicinity of the workpiece suction device. As a result, since the attractive force caused by the magnetic flux passing through the first to fourth protrusions acts on the workpiece even between the first magnet portion and the second magnet portion, the attractive force with respect to the workpiece is reduced. Local degradation can be prevented.

  Here, the first protrusion and the third protrusion overlap with each other through a gap in a side view, and the second protrusion and the fourth protrusion overlap with each other through a gap in a side view. It is preferable. In this case, the work in the vicinity between the first magnet part and the second magnet part is caused by the attractive force caused by the magnetic flux from the first magnet part and the magnetic flux from the second magnet part. Therefore, the suction force for the workpiece can be further increased.

  Further, the first protrusion and the second protrusion are inclined toward the second magnet portion in a side view, and the third protrusion and the fourth protrusion are formed of the first protrusion and the second protrusion, respectively. Corresponding to the inclined shape, it is preferable to have a shape that is inclined toward the first magnet portion in a side view.

  In this case, the workpiece in the vicinity between the first magnet part and the second magnet part is mainly subjected to magnetic flux passing through the first protrusion and the second protrusion at the position on the first magnet part side. On the other hand, it receives the attracting force caused by the magnetic flux passing through the third projection and the fourth projection. In addition, at the position on the second magnet portion side, the workpiece receives an attractive force mainly caused by magnetic flux passing through the third protrusion and the fourth protrusion, while the first protrusion and the second as a slave. 2 Receives attraction force due to magnetic flux passing through the protrusions. Therefore, the work attracted / sucked by each attracting surface can be smoothly conveyed from the first magnet part side to the second magnet part side.

  Furthermore, the first protrusion and the second protrusion have a tapered shape that expands toward the second magnet portion in a side view, and the third protrusion and the fourth protrusion are the first protrusion and the second protrusion, respectively. Corresponding to the taper shape of the protrusion, it is preferable that the taper shape be reduced in diameter toward the first magnet portion in a side view. Thereby, it becomes possible to reliably convey a workpiece thinner than the first magnet part and the second magnet part from the first magnet part side to the second magnet part side.

  Furthermore, the outer peripheral surfaces of the first to fourth magnetic bodies facing the work are suction surfaces for sucking / sucking the work, and the first to fourth protrusions are the first to fourth magnetic bodies. It is preferable to form on each said adsorption | suction surface side. Accordingly, since the magnetic flux passing through the first to fourth protrusions can be reliably linked to the work, it is possible to further increase the attractive force with respect to the work.

  According to another aspect of the present invention, there is provided a work suction device including: a first magnet part capable of attracting a work; and a second magnet part disposed away from the first magnet part and capable of attracting the work. The one magnet part includes a first magnetic body, a first magnet laminated on the first magnetic body, and a second magnetic body laminated on the first magnet, and the second magnet part is , A third magnetic body, a second magnet laminated on the third magnetic body, and a fourth magnetic body laminated on the second magnet, the first magnetic body and the second magnetic body. One of the bodies has a first protrusion protruding toward the other magnetic body, and the other magnetic body has a first notch that overlaps a part of the first protrusion in plan view. The first magnetic member of the third magnetic body and the fourth magnetic body has a second protrusion protruding toward the other magnetic body, The square magnetic material, wherein the second notch overlaps with a part of the second protrusion in plan view is provided.

  According to the above configuration, the first and second protrusions and the first and second notches are formed between the first magnet part and the second magnet part, and the first protrusion and the first notch are formed. And the second protrusion and the second notch are overlapped with each other between the first magnet portion and the second magnet portion and in the vicinity of the workpiece suction device. Since the magnetic flux linked to the workpiece increases and the attractive force due to the magnetic flux acts on the workpiece, a local decrease in the attractive force with respect to the workpiece can be prevented.

  Here, the first protrusions and the first notches alternately overlap with each other through a gap in a side view, and the second protrusions and the second notches alternately overlap with each other through a gap in a side view. It is preferable. In this case, the work in the vicinity between the first magnet part and the second magnet part is caused by the attractive force caused by the magnetic flux from the first magnet part and the magnetic flux from the second magnet part. Therefore, the suction force for the workpiece can be further increased.

  The outer peripheral surfaces of the first to fourth magnetic bodies facing the workpiece are suction surfaces that attract / suck the workpiece, and the first and second protrusions and the first and second notches are It is preferable that the first to fourth magnetic bodies are formed on the respective adsorption surfaces. Thereby, since the magnetic flux can be reliably linked to the workpiece between the first magnet portion and the second magnet portion, it is possible to further increase the attractive force with respect to the workpiece.

  In the above-described workpiece suction device, each attracting surface of the first and second magnetic bodies is a curved surface, and each attracting surface of the third and fourth magnetic bodies is with respect to the second magnet portion side of the curved surface. It is preferable to be a straight plane. In addition, the attracting surfaces of the first and second magnetic bodies are linear planes, and the attracting surfaces of the third and fourth magnetic bodies are curved surfaces that are curved with respect to the plane. Is also preferable. In this case, by adjusting the magnitudes of the magnetic fluxes from the first and second magnets, it is possible to change the trajectory of the workpiece in the direction along the plane or the direction along the curved surface.

  Moreover, it is preferable that the outer peripheral surface of the said 1st magnet part which opposes the said workpiece | work, and the outer peripheral surface of the said 2nd magnet part are each formed substantially flush. The magnetic flux from the first and second magnets can be reliably linked to the work via the first to fourth magnetic bodies, and the attractive force on the work can be further increased.

  Therefore, the workpiece suction device according to the present invention can reliably sort and transport the workpieces as compared with the workpiece suction device according to the prior art, and sorts and conveys the articles on the conveyor. It is suitable as a switching device for use.

  In this case, it is preferable that the first magnet unit is disposed on the upstream side in the conveyance direction of the workpiece, and the second magnet unit is disposed on the downstream side in the conveyance direction of the workpiece.

  In the work suction device described above, the first magnet is a permanent magnet or an electromagnet, and the second magnet is a permanent magnet or an electromagnet. When at least one of the first magnet and the second magnet is an electromagnet, the electromagnet includes a coil laminated on the first or third magnetic body, and an iron core disposed inside the coil. It consists of.

  As described above, according to the workpiece suction device according to the present invention, the first and fourth magnets are formed by forming the first to fourth protrusions in the space between the first magnet part and the second magnet part. Part of the magnetic flux passes through the first to fourth protrusions and is linked to the workpiece in the vicinity of the workpiece suction device. As a result, since the attractive force caused by the magnetic flux passing through the first to fourth protrusions acts on the workpiece even between the first magnet portion and the second magnet portion, the attractive force with respect to the workpiece is reduced. Local degradation can be prevented.

  Further, according to the workpiece suction device according to the present invention, the first and second protrusions and the first and second notches are formed between the first magnet part and the second magnet part, and the first protrusion and the first notch are formed. Compared with the prior art, the workpiece suction is performed between the first magnet portion and the second magnet portion by overlapping one notch and overlapping the second protrusion and the second notch. Since the magnetic flux linked to the workpiece in the vicinity of the apparatus is increased and the attractive force due to the magnetic flux acts on the workpiece, a local decrease in the attractive force with respect to the workpiece can be prevented.

  A preferred embodiment of a workpiece suction device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a workpiece suction device 10 according to the present embodiment, and FIG. 2 is a cross-sectional view of a first magnet unit 12 constituting the workpiece suction device 10 taken along line II-II in FIG. 3 is a plan view of the space between the first magnet portion 12 and the second magnet portion 14 as viewed from above. FIG. 4 is a plan view of the work between the first magnet portion 12 and the second magnet portion 14. It is the side view seen from 24 side.

  As shown in FIG. 1, the workpiece suction device 10 includes a first magnet unit 12 disposed on the upstream side with respect to the conveyance direction of the substantially cylindrical workpiece 24 made of a magnetic material (the direction from the left side to the right side in FIG. 1). And a second magnet portion 14 that is spaced apart from the first magnet portion 12 and arranged on the downstream side in the transport direction. In addition, the said workpiece | work suction device 10 is arrange | positioned along the conveyor which is not shown in figure, and the said workpiece | work 24 is conveyed along the said conveyance direction under the drive effect | action of the said conveyor.

  As shown in FIGS. 1 and 2, the first magnet unit 12 includes a thin plate-shaped first magnetic body 15 and a thin plate-shaped iron core 22 provided in the central portion of the upper surface of the first magnetic body 15. A coil 18 in which the outer peripheral surface of the iron core 22 is wound with a plurality of conductive wires and is entirely covered with the electric insulator 16, and the electric insulator 16, the coil 18 and the iron core together with the first magnetic body 15. The second magnetic body 20 is disposed so as to sandwich the 22. In this case, an electromagnet 19 is constituted by the coil 18 covered with the electrical insulator 16 and the iron core 22.

  On the other hand, the second magnet portion 14 is configured by laminating a thin plate-shaped third magnetic body 26, a permanent magnet 28, and a fourth magnetic body 30 in this order.

  The side surfaces (the side surfaces on the near side in FIG. 1) of the first magnet unit 12 and the second magnet unit 14 on which the workpiece 24 is conveyed are formed substantially flush with each other, and the side surfaces of the first magnet unit 12 are The curved surface is curved with a predetermined radius of curvature with respect to the conveying direction, and the side surface of the second magnet portion 14 is the downstream side of the curved surface (the side surface of the first magnet portion 12 closer to the second magnet portion 14). ) For a straight plane. In this case, the curved surfaces of the first and second magnetic bodies 15 and 20 and the planes of the third and fourth magnetic bodies 26 and 30 are suction surfaces that can attract / suck the work 24.

  Here, the N pole and the S pole of the electromagnet 19 and the permanent magnet 28 may be arbitrary with respect to the vertical direction shown in FIGS. 1 and 2, and accordingly, the first to fourth magnetic bodies 15, 20, 26, 30 are not limited. The magnetic poles are: (1) the first magnetic body 15 and the third magnetic body 26 are the same magnetic pole (N pole and N pole or S pole and S pole), and the second magnetic body 20 and the fourth magnetic body 30 are the same magnetic pole. (2) The first magnetic body 15 and the third magnetic body 26 are different magnetic poles (N pole and S pole or S pole and N pole). The second magnetic body 20 and the fourth magnetic body 30 may have different magnetic poles (S pole and N pole or N pole and S pole).

  In FIGS. 1 and 4, the first and third magnetic bodies 15 and 26 have substantially the same thickness, and the electromagnet 19 and the permanent magnet 28 have substantially the same thickness, and the second and fourth magnets. The bodies 20 and 30 have substantially the same thickness, and the first and second magnet parts 12 and 14 have substantially the same thickness, but these thicknesses depend on the purpose of use of the workpiece suction device 10. You may change suitably.

  Here, as shown in FIGS. 1, 3, and 4, the first magnetic body 15 is attracted to the side surface (the downstream side surface in the transport direction) of the first magnet unit 12 on the second magnet unit 14 side. A first protrusion 32 having a rectangular shape protrudes from the surface (side facing the work 24) toward the third magnetic body 26, and is fourth from the attracting face (side near the work 24) of the second magnetic body 20. A rectangular second protrusion 36 protrudes toward the magnetic body 30. On the other hand, on the side surface on the first magnet unit 12 side (the side surface on the upstream side in the transport direction) of the second magnet unit 14, the first magnetism is formed from the adsorption surface (plane facing the workpiece 24) side of the third magnetic body 26. A rectangular third protrusion 34 is formed to protrude toward the body 15, and a rectangular fourth protrusion 38 is formed from the suction surface (plane near the work 24) side of the fourth magnetic body 30 toward the second magnetic body 20. Protrusions are formed.

  In this case, when viewed from the workpiece 24, the first protrusions 32 and the third protrusions 34 overlap with each other through the gap, while the second protrusions 36 and the fourth protrusions 38 alternately with the gap. Overlapping (see FIG. 4). That is, the first protrusion 32 protruding from the position near the top surface of the first magnetic body 15 is located above the third protrusion 34 protruding from the position near the bottom surface of the third magnetic body 26 via the gap. On the other hand, above the fourth protrusion 38 protruding from the position near the bottom surface of the fourth magnetic body 30, the second protrusion 36 protruding from the position near the top surface of the second magnetic body 20 is interposed through the gap. It overlaps with the 4th protrusion 38 (refer FIG.3 and FIG.4).

  An electric insulator 40 made of resin is disposed between the electric insulator 16 and the permanent magnet 28 so as to be held between the first protrusion 32 and the fourth protrusion 38.

  The first to fourth magnetic bodies 15, 20, 26, 30 and the iron core 22 are made of, for example, low carbon steel. Since the coil 18 is molded by the electric insulator 16 made of resin as described above, the coil 18 is interposed between the first magnetic body 15, the second magnetic body 20, and the iron core 22. The electrical insulation can be ensured. Furthermore, the permanent magnet 28 is comprised from the rare earth magnet (Nd-Fe-B), for example. In addition, the material which comprises the 1st-4th magnetic bodies 15, 20, 26, and 30 mentioned above, the iron core 22, the coil 18, and the permanent magnet 28 is not limited to the illustrated material.

  Next, the operation of the above-described workpiece suction apparatus 10 will be described with reference to FIGS.

  When the coil 24 is energized from a power source (not shown) in a state where the workpiece 24 is conveyed from the left side to the right side in FIG. 1 under the driving action of the conveyor, a magnetic flux is generated in the iron core 22, and this magnetic flux is generated in the iron core 22. (See FIG. 2), the first magnetic body 15 is linked to the workpiece 24 existing in the vicinity of the first magnet portion 12. The interlinked magnetic flux interlinks with the second magnetic body 20 and reaches the iron core 22. At that time, an attraction force is generated in the direction from the work 24 to the first magnet portion 12 under the action of the magnetic flux, and the work 24 causes the attraction surfaces (curved surfaces) of the first and second magnetic bodies 15 and 20 by the attraction force. ). The attracted / sucked work 24 is transported to the second magnet portion 14 side along each suction surface.

  Next, since the first to fourth protrusions 32 to 38 are provided between the first magnet part 12 and the second magnet part 14, the magnetic flux from the iron core 22 is the first magnetic body 15 and the first magnet part 15. The interlinkage magnetic flux is linked to the work 24 via the protrusion 32, and the interlinked magnetic flux reaches the iron core 22 via the second protrusion 36 and the second magnetic body 20 from the work 24. On the other hand, the magnetic flux generated from the permanent magnet 28 is linked to the work 24 via the third protrusion 34, and the interlinked magnetic flux is permanent from the work 24 via the fourth protrusion 38 and the fourth magnetic body 30. The magnet 28 is reached.

  Accordingly, between the first magnet part 12 and the second magnet part 14, the work 24 is moved from the work 24 under the action of the magnetic flux passing through the first and second protrusions 32 and 36. The attractive force generated in the direction of 32, 36 and the attractive force generated in the direction of the third and fourth protrusions 34, 38 from the workpiece 24 under the action of the magnetic flux passing through the third and fourth protrusions 34, 38. And receive. Therefore, the workpiece 24 is conveyed to the second magnet portion 14 side while being attracted / sucked to the first to fourth protrusions 32 to 38 by the respective suction forces.

  When the workpiece 24 is conveyed in the vicinity of the plane of the second magnet portion 14, the magnetic flux generated from the permanent magnet 28 is linked from the third magnetic body 26 to the workpiece 24, and the linked magnetic flux 24 passes through the fourth magnetic body 30 and reaches the permanent magnet 28. Therefore, the work 24 receives an attractive force generated in the direction of the second magnet portion 14 from the work 24 under the action of the magnetic flux, and receives the attraction surfaces (planar surfaces) of the third and fourth magnetic bodies 26 and 30. Adsorbed / aspirated by The sucked / sucked work 24 is sent out downstream in the direction of each plane.

  When the electromagnet 19 is not energized, the workpiece 24 is transported along the transport direction without being changed in the trajectory, and is not transported in the planar direction.

  Next, an example in which the above-described workpiece suction device 10 is applied to the sorting conveyor system 50 as a sorting conveyor switching device will be described with reference to FIGS. 5 and 6.

  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 laid along the main line direction (arrow A direction) and the branch direction (arrow B direction) below the main line conveyance path 58 and the branch conveyance path 62 of the slat conveyor 56, respectively. A work suction device 10 that is a sorting conveyor switching device is attached to a portion where the main rail 64 and the branch rail 66 are branched to sort the articles 60.

  The first and second magnet parts 12 and 14 constituting the workpiece suction device 10 are fixed along the groove part 70 of the branch rail 66 branched from the groove part 68 of the main rail 64, and the shoe part 54 is attached to the groove parts 68 and 70. A sliding member 72 which is connected to the bottom surface portion of the plate and moves integrally with the shoe 54 and made of a magnetic material is slidably provided. The sliding member 72 corresponds to the workpiece 24 described above (see FIGS. 1 and 2).

  In this case, the first magnet portion 12 of the workpiece attracting device 10 is disposed at a location where the branch rail 66 branches from the main rail 64, and the second magnet portion 14 is disposed along the branch rail 66.

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

  When the coil 18 is energized from the power source, a magnetic flux is generated in the iron core 22, and the magnetic flux is applied to the sliding member 72 via the first magnetic body 15 and the second magnetic body 20 (see FIGS. 1 to 4). Interlink. Under the action of the magnetic flux, an attractive force to the sliding member 72 is generated, and the sliding member 72 is attracted to the first magnet portion 12 by the attractive force.

  Accordingly, the sliding member 72 is guided to the branch rail 66 side along the side surface (curved surface) of the first magnet unit 12 while being attracted / attracted to the first magnet unit 12 side. And between the said 1st magnet part 12 and the 2nd magnet part 14, the said sliding member 72 is the magnetic flux which passes the 1st-4th protrusion 32-38 (refer FIG.1, FIG.3 and FIG.4). By the respective suction forces resulting from the above, the first to fourth protrusions 32 to 38 are further guided to the branch rail 66 side while being attracted / sucked. Next, the sliding member 72 is formed in the groove portion 70 of the branch rail 66 branched from the main rail 64 by the attractive force caused by the magnetic flux generated from the permanent magnet 28 and passing through the third and fourth magnetic bodies 26 and 30. Sent out along.

  As a result, the shoe 54 connected to the sliding member 72 moves along the slat rod 52, and the article 60 on the slat conveyor 56 is sent from the main line conveyance path 58 toward the branch conveyance path 62, The sorting of the articles 60 is performed.

  When no power is supplied to the coil 18 from the power source, no magnetic flux is generated from the iron core 22, so that no attractive force is generated on the sliding member 72. Therefore, the sliding member 72 is moved along the main rail 64 with the arrow A. Conveyed in the direction. As a result, the shoe 54 connected to the sliding member 72 stays on the front side of FIG. 5 in the slat rod 52, and the article 60 on the slat conveyor 56 moves in the main conveyance path 58 direction (arrow A direction). Sent to.

  Thus, in the workpiece attracting device 10 according to the present embodiment, the iron core 22 is formed by projecting the first to fourth protrusions 32 to 38 in the space between the first magnet unit 12 and the second magnet unit 14. A part of the magnetic flux from the permanent magnet 28 passes through the first to fourth protrusions 32 to 38 and is linked to the workpiece 24 (sliding member 72) being conveyed in the vicinity of the workpiece suction device 10. As a result, even between the first magnet part 12 and the second magnet part 14, each attractive force caused by each magnetic flux passing through the first to fourth protrusions 32 to 38 acts on the work 24. Therefore, it is possible to prevent a local decrease in the suction force with respect to the workpiece 24.

  In this case, the outer peripheral surface of the first magnet portion 12 facing the work 24 is substantially flush, the outer peripheral surface of the second magnet portion 14 facing the workpiece 24 is substantially flush, and the first of these outer peripheral surfaces is the first. Since the outer peripheral surfaces of the fourth magnetic bodies 15, 20, 26, 30 are suction surfaces for attracting / sucking the work 24, magnetic fluxes from the iron core 22 and the permanent magnet 28 are used as the first to fourth magnetic bodies 15. , 20, 26, 30 can be linked to the workpiece 24 with certainty, and each suction force to the workpiece 24 can be increased.

  Further, by forming the first to fourth protrusions 32 to 38 on the respective suction surfaces, the magnetic fluxes passing through the first to fourth protrusions 32 to 38 are reliably linked to the work 24. Therefore, the suction force for the workpiece 24 can be further increased.

  Further, the suction surfaces of the first and second magnetic bodies 15 and 20 are curved surfaces along the conveying direction of the workpiece 24, and the suction surfaces of the third and fourth magnetic bodies 26 and 30 are downstream of the curved surfaces. If the plane is a linear plane, it is possible to change the trajectory of the workpiece 24 from the conveying direction to the direction along the plane by adjusting the magnitude of the magnetic flux from the iron core 22 and the permanent magnet 28, respectively. Become.

  Therefore, the workpiece suction device 10 can reliably sort and transport the workpiece 24 as compared with the workpiece suction device (electromagnetic device) 100 (see FIG. 12) according to the prior art. It is suitable as a switching device for use.

  Further, since the first protrusions 32 and the third protrusions 34 are alternately overlapped via a gap, and the second protrusions 36 and the fourth protrusions 38 are alternately overlapped via a gap, the first magnet portion 12 and the first protrusions The workpiece 24 being transported between the two magnet parts 14 receives the attractive force caused by the magnetic flux from the first magnet part 12 and the attractive force caused by the magnetic flux from the second magnet part 14. As a result, the suction force with respect to the workpiece 24 can be further increased.

  In the workpiece suction device 10 described above, as shown in FIG. 4, the rectangular first to fourth protrusions 32 to 38 alternately overlap with each other through a gap, but as shown in FIG. 7, the first to first projections It is also preferable that the shapes of the four protrusions 32 to 38 be inclined along the transport direction. In FIG. 7, the first and second protrusions 32 and 36 are inclined from the first magnet portion 12 toward the second magnet portion 14, while the third and fourth protrusions 34 and 38 are The shape is inclined from the two magnet portions 14 toward the first magnet portion 12.

  In this case, the workpiece 24 conveyed between the first magnet unit 12 and the second magnet unit 14 mainly passes through the first projection 32 and the second projection 36 at the position on the first magnet unit 12 side. On the other hand, it receives attraction force due to the magnetic flux passing through the third protrusion 34 and the fourth protrusion 38 as a slave. Further, at the position on the second magnet portion 14 side, the work 24 receives an attractive force mainly caused by the magnetic flux passing through the third protrusion 34 and the fourth protrusion 38, while the first protrusion 32 and the second protrusion as the slave. 2 The attraction force resulting from the magnetic flux passing through the protrusion 36 is received. Therefore, the workpiece 24 being conveyed along each of the attracting surfaces can be smoothly conveyed from the first magnet unit 12 side to the second magnet unit 14 side. Therefore, even when the work 24 is being conveyed while rotating or at a high speed, the work 24 is smoothly transferred from the first magnet part 12 to the second magnet part 14. Can be transported.

  Moreover, in the workpiece | work suction device 10 mentioned above, as shown in FIG. 8, the shape of the 1st and 2nd protrusions 32 and 36 is made into the taper shape which expands to the downstream (2nd magnet part 14 side) of the said conveyance direction. It is also preferable that the third and fourth protrusions 34 and 38 have a tapered shape whose diameter decreases toward the upstream side (the first magnet portion 12 side) in the transport direction. In this case, even if the workpiece 24 is thinner than the first magnet portion 12 and the second magnet portion 14, the workpiece 24 is reliably conveyed from the first magnet portion 12 side to the second magnet portion 14 side. Is possible.

  Furthermore, in the workpiece | work suction device 10 mentioned above, although the 1st-4th protrusion 32-38 is provided in the said suction surface side, it replaces with such a structure, and as shown in FIG. Of course, even if the widths of the protrusions 34 and 38 are substantially the same as the widths of the third and fourth magnetic bodies 26 and 30, the above-described effects can be obtained. Of course, the widths of the first to fourth protrusions 32 to 38 may be changed as appropriate.

  Furthermore, in the workpiece suction device 10 described above, the first to fourth magnetic bodies 15, 20, 26, and 30 are provided with the first to fourth protrusions 32 to 38, respectively. As shown in FIG. 10, notches (first and second notches) 42, 44 are formed on the first magnet portion 12 (see FIG. 1) side of the third and fourth magnetic bodies 26, 30 to form the first and second Of course, even if the two protrusions 32 and 36 are overlapped with the notches 42 and 44 through a gap, the above-described effects can be obtained.

  The combination of the first and second protrusions 32 and 36 and the notches 42 and 44 in the workpiece suction device 10 is an example, and (1) the first and second magnetic bodies 15 and 20 on the second magnet portion 14 side. When a notch is formed and the third and fourth protrusions 34 and 38 are overlapped with the respective notches via a gap, (2) the second magnet portion 14 side of the first magnetic body 15 and the fourth magnetic body 30 When notches are respectively formed on the first magnet portion 12 side, and the second and third protrusions 36 and 34 are overlapped with the notches via gaps, (3) the second magnet portion 14 of the second magnetic body 20 It is also possible to form notches on the side and the first magnet portion 12 side of the third magnetic body 26 and to overlap the first and fourth protrusions 32 and 38 with the respective notches via gaps.

  Furthermore, in the workpiece suction device 10 described above, as shown in FIG. 1, the side surface on the workpiece 24 side of the first magnet portion 12 is a curved surface with respect to the conveying direction of the workpiece 24, and the second magnet portion 14 The side surface on the workpiece 24 side is a linear plane with respect to the downstream side of the curved surface. Instead of such a configuration, as shown in FIG. 11, the side surface on the workpiece 24 side of the first magnet portion 12 is a linear plane along the conveying direction of the workpiece 24, and the workpiece 24 in the second magnet portion 14 is used. Of course, the above-described effects can be obtained even when the side surface is curved with a predetermined radius of curvature with respect to the plane.

  Furthermore, the above-described workpiece attracting device 10 is a so-called electromagnetic device in which an electromagnet 19 is disposed in the first magnet portion 12 and a permanent magnet 28 is disposed in the second magnet portion 14. (1) When a permanent magnet is arranged in the first and second magnet parts 12, 14, (2) When a permanent magnet is arranged in the first magnet part 12 and an electromagnet is arranged in the second magnet part 14, (3) Of course, even when electromagnets are arranged in the first and second magnet parts 12 and 14, the above-described effects can be obtained.

  Furthermore, in the above-described workpiece suction device 10, suction / suction with respect to the workpiece 24 being transported is performed, but the workpiece suction device 10 can also be used as a device that simply suctions / sucks the workpiece 24. In this case, as described above, since the local reduction of the attractive force between the first magnet part 12 and the second magnet part 14 is improved, a uniform attractive force is generated for the workpiece 24. As a result, for example, the thin workpiece 24 can be attracted / sucked and floated without being deformed.

  In addition, the workpiece | work suction device which concerns on this invention is not restricted to the above-mentioned embodiment, Of course, it can take various structures, without deviating from the summary of this invention.

It is a perspective view of the workpiece | work suction device which concerns on this embodiment. It is sectional drawing along the II-II line of FIG. It is the top view which looked at the 3rd projection and the 4th projection of Drawing 1 from the upper part. It is the side view which looked at the 1st-the 4th projection of Drawing 1 from the work side. It is a perspective view which shows having applied the workpiece | work suction device of FIG. 1 to the switching apparatus for sorting conveyors. FIG. 6 is an enlarged plan view of the workpiece suction device of FIG. 5. It is the side view which made the 1st-4th protrusion of FIG. 4 the shape which inclines along the conveyance direction of a workpiece | work. It is the side view which made the 1st-4th protrusion of FIG. 4 the taper shape along the conveyance direction of a workpiece | work. It is a perspective view which shows the case where the width | variety of a 3rd and 4th protrusion is made substantially the same as the width | variety of a 3rd and 4th magnetic body. It is a perspective view which shows the case where the notch is provided in the 1st magnet part side of the 3rd and 4th magnetic body. It is a perspective view which shows the case where the workpiece | work side surface in a 1st magnet part is made into a linear plane, and the workpiece | work side surface in a 2nd magnet part is made into a curved surface. It is a top view which shows the workpiece | work suction device which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Work attracting apparatus 12 ... 1st magnet part 14 ... 2nd magnet part 15 ... 1st magnetic body 18 ... Coil 19 ... Electromagnet 20 ... 2nd magnetic body 22 ... Iron core 24 ... Work piece 26 ... 3rd magnetic body 28 ... Permanent Magnet 30 ... Fourth magnetic body 32 ... First projection 34 ... Third projection 36 ... Second projection 38 ... Fourth projection 42, 44 ... Notch

Claims (14)

A first magnet part capable of attracting a workpiece; and a second magnet part arranged separately from the first magnet part and capable of attracting the workpiece.
The first magnet unit includes a first magnetic body, a first magnet laminated on the first magnetic body, and a second magnetic body laminated on the first magnet,
The second magnet portion includes a third magnetic body, a second magnet stacked on the third magnetic body, and a fourth magnetic body stacked on the second magnet,
On the outer peripheral surface of the first magnetic body on the second magnet portion side, a first protrusion toward the third magnetic body is projected and formed,
On the outer peripheral surface of the second magnetic body on the second magnet portion side, a second protrusion toward the fourth magnetic body is formed to protrude,
On the outer peripheral surface of the third magnetic body on the first magnet portion side, a third protrusion toward the first magnetic body is formed to protrude,
On the outer peripheral surface of the fourth magnetic body on the first magnet portion side, a fourth protrusion toward the second magnetic body is formed to protrude ,
The first protrusions and the third protrusions overlap each other through a gap in a side view,
Wherein the second protrusion and the fourth protrusion, workpiece suction device, characterized in that that not overlap alternately through the gaps in a side view. The workpiece suction device according to claim 1 ,
The first protrusion and the second protrusion are inclined to the second magnet portion side in a side view,
The third protrusion and the fourth protrusion have a shape that inclines toward the first magnet portion in a side view corresponding to the inclined shape of the first protrusion and the second protrusion. Suction device. The workpiece suction device according to claim 2 ,
The first protrusion and the second protrusion are tapered so as to expand toward the second magnet portion in a side view,
The third protrusion and the fourth protrusion are tapered so as to reduce in diameter toward the first magnet portion in a side view, corresponding to the tapered shape of the first protrusion and the second protrusion. Work suction device. In the workpiece | work suction device of any one of Claims 1-3 ,
The outer peripheral surfaces of the first to fourth magnetic bodies facing the workpiece are suction surfaces that suck / suck the workpiece,
Said 1st-4th protrusion is formed in each said adsorption surface side of said 1st-4th magnetic body. The workpiece | work suction device characterized by the above-mentioned. A first magnet part capable of attracting a workpiece; and a second magnet part arranged separately from the first magnet part and capable of attracting the workpiece.
The first magnet unit includes a first magnetic body, a first magnet laminated on the first magnetic body, and a second magnetic body laminated on the first magnet,
The second magnet portion includes a third magnetic body, a second magnet stacked on the third magnetic body, and a fourth magnetic body stacked on the second magnet,
One of the first magnetic body and the second magnetic body has a first protrusion protruding toward the other magnetic body, and the other magnetic body has the first protrusion in a plan view. A first cutout that overlaps with a portion is provided,
One of the third magnetic body and the fourth magnetic body has a second protrusion protruding toward the other magnetic body, and the other magnetic body has the second protrusion in a plan view. A work suction device characterized in that a second cutout is provided that overlaps a part. The workpiece suction device according to claim 5 ,
The first protrusions and the first notches overlap each other through a gap in a side view,
The work suction device, wherein the second protrusion and the second notch are alternately overlapped with a gap in a side view. The workpiece suction device according to claim 5 or 6 ,
The outer peripheral surfaces of the first to fourth magnetic bodies facing the workpiece are suction surfaces that suck / suck the workpiece,
The work suction device, wherein the first and second protrusions and the first and second cutouts are formed on the suction surfaces of the first to fourth magnetic bodies. The workpiece suction device according to claim 4 or 7 ,
Each adsorption surface of the first and second magnetic bodies is a curved surface,
Each attraction surface of the third and fourth magnetic bodies is a linear plane with respect to the second magnet portion side of the curved surface. The workpiece suction device according to claim 4 or 7 ,
Each adsorption surface of the first and second magnetic bodies is a linear plane,
Each attraction surface of the third and fourth magnetic bodies is a curved surface that is curved with respect to the plane. In the work suction device according to any one of claims 1 to 9
The work suction device, wherein an outer peripheral surface of the first magnet portion and an outer peripheral surface of the second magnet portion facing the workpiece are formed substantially flush with each other. In the work suction device according to any one of claims 1-10,
The workpiece suction device is applied to a sorting conveyor switching device that switches a conveyance path of articles on a conveyor. In the work suction device according to any one of claims 1 to 11
The first magnet part is arranged on the upstream side in the conveyance direction of the workpiece,
The work magnetism attracting device, wherein the second magnet part is arranged on the downstream side in the conveyance direction of the work. In the work suction device according to any one of claims 1 to 12
The first magnet is a permanent magnet or an electromagnet,
The work suction device, wherein the second magnet is a permanent magnet or an electromagnet. The workpiece suction device according to claim 13 ,
When at least one of the first magnet and the second magnet is an electromagnet, the electromagnet includes a coil stacked on the first or third magnetic body, and an iron core disposed inside the coil. A workpiece suction device characterized by comprising.

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