Magnet extraction device

Abstract

Provided is a magnet taking-out device. The taking-out device (10) takes out a plurality of magnets (90) stacked one on top of another inside a housing (80) having a peripheral wall (81) and an upper opening (82) one by one from the top. The taking-out device (10) includes: a pushing-up section (20) that pushes up the plurality of magnets (90) in the upward direction; a restricting section (30) that is disposed laterally to the magnets (90) adjacent to the magnets (90) protruding upward from the upper opening (82); a taking-out section (40) that grips and takes out the first magnet (90) from the top protruding upward from the restricting section (30); and a control section (50) that controls the driving of the pushing-up section (20) and the taking-out section (40). When the first magnet (90) from the top is gripped and taken out by the taking-out section (40), the second magnet (90) from the top is separated from the first magnet (90) from the top by the cooperation of the taking-out section (40) and the restricting section (30).

Description

TECHNICAL FIELD

[0001] The present application relates to a taking-out device that takes out a plurality of magnets stacked one on top of another inside a housing having a peripheral wall and an upper opening, from the top one by one. BACKGROUND

[0002] A rotor core of a magnet-embedded motor is described in Patent Literature 1. The rotor core includes a core main body having a central hole and a plurality of magnet housing holes, and magnets inserted into the respective magnet insertion holes and fixed to the core main body by a resin material.

[0003] The manufacturing process of the rotor core includes a magnet insertion process of inserting the magnets into the magnet housing holes of the core main body. In the magnet insertion process, a taking-out device takes out a plurality of magnets stacked one on top of another inside a housing having a peripheral wall and an upper opening, from the top one by one.

[0004] The taking-out device includes a pushing-up mechanism that pushes up the plurality of magnets in the upward direction, and a taking-out portion that holds the first magnet from the top protruding upward from the upper opening of the housing. The magnet held by the taking-out portion moves together with the taking-out portion to above the magnet housing hole. Thereafter, the magnet is inserted into the magnet housing hole by releasing the holding force of the taking-out portion.

[0005] Prior art documents

[0006] Patent documents

[0007] Patent Literature 1: Japanese Patent Application Publication No. 2019-140842 SUMMARY

[0008] Problems to be solved by the invention

[0009] However, a coating film for rust prevention is provided on the surface of the magnet. In addition, in the manufacturing process of the rotor core in which the plurality of magnets are inserted into the magnet housing holes, the magnets inserted into the common magnet housing holes are sometimes adhered to each other by an adhesive. In addition, the plurality of magnets stacked one on top of another inside the housing are pressed by the weight thereof. Due to this, the magnets adjacent to each other in the upward and downward directions are sometimes adhered to each other by the coating film or the adhesive. In this case, when the first magnet from the top is held and taken out by the taking-out portion, the other magnets including the second magnet from the top are taken out together. As a result, the manufacturing line is stopped, and the manufacturing efficiency can deteriorate.

[0010] An object of the present application is to provide a taking-out device of a magnet that can take out the magnets from the top one by one appropriately.

[0011] Solution to the problem

[0012] A magnet taking-out device for solving the above problems is a taking-out device that takes out a plurality of magnets stacked one on top of another inside a housing having a peripheral wall and an upper opening from above in order, the magnet taking-out device including: a pushing-up section that pushes up the plurality of magnets upward; a restricting section that is disposed adjacent to the side of the magnets protruding upward from the upper opening; a taking-out section that grips and takes out a first magnet from above among the magnets protruding upward from the restricting section; and a control section that controls the driving of the pushing-up section and the taking-out section, the magnet taking-out device being configured such that, when the first magnet from above is gripped and taken out by the taking-out section, the second magnet from above is separated from the first magnet from above by cooperation of the taking-out section and the restricting section.

[0013] According to this configuration, when the first magnet from above is gripped and taken out by the taking-out section, the second magnet from above is separated from the first magnet from above by cooperation of the taking-out section and the restricting section. Thus, even in the case where the magnets adjacent to each other above and below are stuck to each other, it is possible to take out only the first magnet from above. Therefore, the magnets can be taken out from above in order as appropriate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a sectional view showing the configuration of the first embodiment of the magnet taking-out device.

[0015] Figure 2 is a sectional view showing the action of the taking-out device of the first embodiment.

[0016] Figure 3 is a sectional view showing the configuration and action of the taking-out device of the second embodiment.

[0017] Reference signs list

[0018] 10, taking-out device; 20, pushing-up section; 21, rod; 22, rod driving section; 30, restricting section; 31, gripping section; 32, gripping driving section; 40, taking-out section; 41, holding disc; 42, holding disc driving section; 50, control section; 80, housing; 81, peripheral wall; 82, upper opening; 83, lower opening; 84, stopper; 90, magnet. DETAILED DESCRIPTION

[0019] <First Embodiment>

[0020] Hereinafter, the first embodiment of the magnet taking-out device will be described with reference to Figure 1 and Figure 2

[0021] As shown in Figure 1 ​As shown, the magnet removal device (hereinafter referred to as the removal device 10) is used in the rotor core manufacturing process, and more specifically, in the magnet insertion process for inserting the magnet 90 into the magnet receiving hole (not shown) of the core body.

[0022] The removal device 10 will remove the multiple magnets 90 stacked on top of each other inside the storage body 80 in sequence.

[0023] The extraction device 10 includes an upward pushing part 20, a limiting part 30, an extraction part 40, and a control part 50.

[0024] First, let's explain the storage body 80 and the magnet 90.

[0025] (Storage unit 80)

[0026] like Figure 1 As shown, the storage body 80 houses multiple magnets 90 stacked vertically. The storage body 80 has a peripheral wall 81, an upper opening 82, a lower opening 83, and a stop 84. Alternatively, the storage body 80 can also be installed in a device not shown.

[0027] The peripheral wall 81 extends along the vertical direction and has the same cross-sectional shape over its entire vertical extent. The upper opening 82 and the lower opening 83 may also be rectangular in shape when viewed from above.

[0028] A pair of stops 84 are provided at the lower part of the peripheral wall 81. The pair of stops 84 connects a pair of opposing inner surfaces of the peripheral wall 81 to each other. The pair of stops 84 are spaced apart from each other and arranged parallel to each other in a direction orthogonal to the vertical direction. The pair of stops 84 prevent the magnet 90 from falling out of the lower opening 83 by abutting against the lower surface of the first magnet 90 from the bottom.

[0029] (Magnet 90)

[0030] like Figure 1 As shown, magnet 90 is a generally flat permanent magnet. Multiple magnets 90 are stacked in the thickness direction (vertical direction in the figure).

[0031] The size of the magnet 90 when viewed from above is smaller than the size of the internal space of the surrounding wall 81 when viewed from above.

[0032] A rust-proof coating may also be provided on the surface of magnet 90.

[0033] Next, the push-up part 20, the limiting part 30, the extraction part 40, and the control part 50 will be described.

[0034] (Push up part 20)

[0035] like Figure 1As shown, the push-up part 20 pushes the multiple magnets 90 stored inside the housing 80 upwards. The push-up part 20 includes a rod 21 and a rod drive part 22.

[0036] Rod 21 extends in the vertical direction.

[0037] The upper part of rod 21 is located inside the housing 80. The upper end of rod 21 abuts against the lower surface of the first magnet 90 from the bottom.

[0038] The lever drive unit 22 is connected to the lever 21, driving the lever 21 to slide in the vertical direction. Alternatively, the lever drive unit 22 may include a motor and a known conversion mechanism (both omitted from the figure) that converts the rotational motion of the motor into the linear motion of the lever 21.

[0039] (Restriction Section 30)

[0040] like Figure 1 As shown, the limiting part 30 is disposed adjacent to the magnet 90, which protrudes upward from the upper opening 82 of the housing 80, on the side of the magnet 90. Alternatively, the limiting part 30 can also be installed on the housing 80. Furthermore, the limiting part 30 can also be installed on a device other than the housing 80.

[0041] The limiting part 30 is laterally adjacent to the second magnet 90 (hereinafter referred to as the second magnet 90 from the top) that protrudes upward from the upper opening 82 of the storage body 80, and is not laterally adjacent to the first magnet 90 from the top.

[0042] In this embodiment, the limiting part 30 is provided around the entire circumference of the upper opening 82.

[0043] (Removal section 40)

[0044] like Figure 1 As shown, the extraction section 40 grasps and extracts the first magnet 90 (hereinafter referred to as the first magnet 90 from the top) that protrudes upward from the restriction section 30.

[0045] The extraction unit 40 includes a holding disk 41 and a holding disk drive unit 42.

[0046] The retaining disc drive unit 42 is connected to the retaining disc 41 and grips and drives the retaining disc 41. In addition, the retaining disc drive unit 42 moves the retaining disc 41 in the vertical direction and in a direction orthogonal to the vertical direction.

[0047] (Control Unit 50)

[0048] like Figure 2 As shown, the control unit 50 controls the driving of the push-up unit 20 and the take-out unit 40. The control unit 50 is electrically connected to the lever drive unit 22 and the holding disc drive unit 42, respectively.

[0049] The control unit 50 controls the lever drive unit 22 to make the two magnets 90 protrude upward from the upper opening 82 of the housing 80.

[0050] The control unit 50 controls the holding disk drive unit 42 so that the holding disk 41 holds the first magnet 90 from the top.

[0051] Here, the extraction device 10 is configured such that when the extraction part 40 holds and extracts the first magnet 90 from the top, the second magnet 90 from the top is separated from the first magnet 90 by the cooperation of the extraction part 40 and the limiting part 30.

[0052] More specifically, in this embodiment, the control unit 50 is configured such that after the first magnet 90 from the top is held by the extraction unit 40, the extraction unit 40 is moved to the side of the presence restriction unit 30 before the extraction unit 40 is moved upward.

[0053] In addition, the control unit 50 controls the lever drive unit 22 so that when the first magnet 90 from the top is taken out, both magnets 90 protrude upward from the upper opening 82 of the storage body 80.

[0054] Next, the function of this implementation method will be explained.

[0055] like Figure 2 As shown, after the first magnet 90 from the top is held by the holding plate 41 of the extraction section 40, before the holding plate 41 is moved upward, the extraction section 40 is moved to the side of the containing restriction section 30. Figure 3 (To the right) it moves. As a result, the second magnet 90 from the top is pressed against the limiting part 30. As a result, a shear force acts between the first magnet 90 from the top and the second magnet 90 from the top.

[0056] That is, when the first magnet 90 from the top is grasped and removed using the removal part 40, the second magnet 90 from the top is separated from the first magnet 90 by the cooperation of the removal part 40 and the limiting part 30. Thus, even if the adjacent magnets 90 are stuck together, only the first magnet 90 from the top can be removed.

[0057] Next, the effects of this implementation method will be explained.

[0058] The control unit 50 is configured such that after the first magnet 90 from the top is held by the extraction unit 40, the extraction unit 40 is moved to the side of the presence restriction unit 30 before the extraction unit 40 is moved upward.

[0059] Based on this structure, the aforementioned function is achieved, thus enabling proper removal of the first magnet 90 from the top using a simple structure.

[0060] <Second Implementation>

[0061] Hereinafter, a second embodiment of the magnet taking-out device will be described focusing on the differences from the first embodiment. Figure 3

[0062] In the second embodiment, the same reference numerals as those of the first embodiment are assigned to the same or corresponding structures as those of the first embodiment, and repetitive description will be omitted.

[0063] As shown in FIG. 6, the restriction portion 30 is configured to be able to hold the second-from-top magnet 90. Figure 3

[0064] More specifically, the restriction portion 30 includes a pair of holding portions 31 configured to be able to hold the second-from-top magnet 90 and a holding drive portion 32 configured to drive the pair of holding portions 31.

[0065] The pair of holding portions 31 is disposed to the side of the second-from-top magnet 90 with the magnet 90 interposed therebetween. The pair of holding portions 31 is configured to be able to move between a holding position at which the magnet 90 is held, indicated by a solid line in FIG. 6, and a release position at which the magnet 90 is released, indicated by a double-dot chain line in FIG. 6. Figure 3 Figure 3 The holding drive portion 32 drives the pair of holding portions 31 between the holding position and the release position.

[0066] The holding drive portion 32 drives the pair of holding portions 31 between the holding position and the release position.

[0067] The control portion 50 controls the drive of the restriction portion 30 in addition to the push-up portion 20 and the taking-out portion 40. The control portion 50 is electrically connected to the holding drive portion 32.

[0068] In the present embodiment, the control portion 50 is configured to hold the second-from-top magnet 90 by the pair of holding portions 31 while the first-from-top magnet 90 is held and taken out by the taking-out portion 40.

[0069] The control portion 50 is configured to move the taking-out portion 40 upward or sideward in a state where the second-from-top magnet 90 is held by the pair of holding portions 31.

[0070] In addition, the control portion 50 controls the holding drive portion 32 to release the holding of the magnet 90 by the pair of holding portions 31 when the first-from-top magnet 90 is taken out. Then, the lever drive portion 22 is controlled to cause the two magnets 90 to protrude upward from the upper opening 82 of the housing 80.

[0071] Next, the effects of the present embodiment will be described.

[0072] As shown in FIG. 6, the restriction portion 30 is configured to be able to hold the second-from-top magnet 90. Figure 3 In the present embodiment, the control portion 50 is configured to hold the second-from-top magnet 90 by the pair of holding portions 31 while the first-from-top magnet 90 is held and taken out by the taking-out portion 40.​​​Figure 3 As indicated by the middle arrow A, if the extraction portion 40 is moved to the side, a shearing force acts between the first magnet 90 from the top and the second magnet 90 from the top. Further, in this state, as indicated by the middle arrow B, if the extraction portion 40 is moved upward, a pulling force acts between the first magnet 90 from the top and the second magnet 90 from the top. Figure 3 As indicated by the middle arrow B, if the extraction portion 40 is moved upward, a pulling force acts between the first magnet 90 from the top and the second magnet 90 from the top.

[0073] That is, when the first magnet 90 from the top is held and extracted by the extraction portion 40, the second magnet 90 from the top is separated from the first magnet 90 from the top by the cooperation of the extraction portion 40 and the restriction portion 30. Thus, even in the case where the magnets 90 adjacent to each other in the vertical direction are adhered to each other, it is possible to extract only the first magnet 90 from the top.

[0074] Next, the effects of the present embodiment will be described.

[0075] The restriction portion 30 is configured to be able to hold the second magnet from the top. The control portion 50 controls the driving of the restriction portion 30, and is configured to hold the second magnet 90 from the top by the restriction portion 30 when the first magnet 90 from the top is held and extracted by the extraction portion 40.

[0076] According to this configuration, the above-described effects are exerted, and thus it is possible to reliably extract only the first magnet 90 from the top.

[0077] <Modification Examples>

[0078] The present embodiment can be implemented by being changed as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a range where there is no technical contradiction.

[0079] • In the first embodiment, the structure in which the restriction portion 30 is provided in the entire circumferential range of the upper opening 82 is exemplified. However, the restriction portion 30 can not be provided in the entire circumferential range. It is sufficient that the restriction portion 30 is located to the side of the magnet 90 protruding upward from the upper opening 82 of the housing 80 and is located in front of the moving direction of the extraction portion 40.

[0080] • In the second embodiment, the structure in which both of the pair of holding portions 31 are driven between the holding position and the release position is exemplified. Instead, one of the pair of holding portions 31 can be fixed in the position of the solid line, and only the other can be driven between the holding position and the release position. ​ the solid line, and only the other can be driven between the holding position and the release position.

Claims

1. A magnet taking-out apparatus, wherein the magnet taking-out apparatus is an apparatus that takes out a plurality of magnets stacked one on top of another inside a housing having a peripheral wall and an upper opening from the top one by one, the magnet taking-out apparatus includes: a pushing-up section that pushes up the plurality of magnets upward; a restricting section that is disposed adjacent to the side of the magnet that protrudes upward from the upper opening; a taking-out section that grips and takes out the first magnet from the top that protrudes upward from the restricting section; and a control section that controls the driving of the pushing-up section and the taking-out section, the magnet taking-out apparatus is configured so that, when the first magnet from the top is gripped and taken out by the taking-out section, the second magnet from the top is separated from the first magnet from the top by cooperation of the taking-out section and the restricting section, the restricting section is configured to be able to grip the second magnet from the top, the restricting section includes a pair of gripping sections, at least one of the pair of gripping sections is configured to be able to move between a release position in which the magnet is separated and a gripping position in which the magnet is gripped by the pair of gripping sections.

2. The magnet taking-out apparatus according to claim 1, wherein the control section controls the driving of the restricting section and is configured so that, when the first magnet from the top is gripped and taken out by the taking-out section, the second magnet from the top is gripped by the restricting section.

3. A magnet taking-out apparatus, wherein the magnet taking-out apparatus is an apparatus that takes out a plurality of magnets stacked one on top of another inside a housing having a peripheral wall and an upper opening from the top one by one, the magnet taking-out apparatus includes: a pushing-up section that pushes up the plurality of magnets upward; a restricting section that is disposed adjacent to the side of the magnet that protrudes upward from the upper opening; a taking-out section that grips and takes out the first magnet from the top that protrudes upward from the restricting section; and a control section that controls the driving of the pushing-up section and the taking-out section, the control section is configured so that, when the first magnet from the top is gripped and taken out by the taking-out section, after the first magnet from the top is gripped by the taking-out section, the taking-out section is moved to the side where the restricting section is present and the second magnet from the top is pushed against the restricting section, thereby separating the second magnet from the top from the first magnet from the top.

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