Method for measuring a retaining device using a coil

Abstract

Provided is a measurement method using a coil holding device in which a coil is placed without being inclined. The coil holding device holds a concentrated winding cartridge-type coil that is stacked in multiple layers, and includes a plurality of seating portions that allow the concentrated winding cartridge-type coil to be seated. The plurality of seating portions include a seating portion having a height in the vertical direction that is a first height, and a seating portion having a height in the vertical direction that is a second height that is different from the first height. The concentrated winding cartridge-type coil has an upper surface and a lower surface. Each of the seating portions has a seating surface that contacts the lower surface and allows the concentrated winding cartridge-type coil to be seated. The contact point of the seating surface of the seating portion with the upper surface contacted by a probe that measures the thickness in the vertical direction of the concentrated winding cartridge-type coil is located below in the vertical direction.

Description

Technical Field

[0001] This disclosure relates to a measurement method using a holding device with a coil. Background Technology

[0002] Japanese Patent Application Publication No. 2013-017266 discloses a fixture for supporting coils during the manufacturing process of a centralized winding box-type coil.

[0003] Concentrated-wound cassette coils are formed in a spiral shape, thus creating a tilt in the stacking direction. For example, when checking the thickness of the coil in the stacking direction, it is difficult to accurately measure the thickness due to this tilt. In concentrated-wound cassette coils, it is required that the coil be mounted without tilting. Summary of the Invention

[0004] This disclosure was made to solve such a problem, and its purpose is to provide a coil holding device that can hold a coil without tilting.

[0005] One aspect of this disclosure is a coil holding device that holds a multi-layered, centrally wound, box-type coil. The coil holding device includes a plurality of seating portions for seating the centrally wound, box-type coil. The plurality of seating portions include a first seating portion with a first height in the vertical direction and a second seating portion with a second height different from the first height.

[0006] In the above-mentioned coil holding device, the concentrated winding box coil may have an upper surface and a lower surface, and each seating portion may have a seat surface that contacts the lower surface and seats the concentrated winding box coil. The contact point of the first seat surface of the first seating portion relative to the upper surface contacted by the probe measuring the thickness of the concentrated winding box coil in the vertical direction is located below in the vertical direction.

[0007] In the above-mentioned coil holding device, an adjustment mechanism may also be provided, which moves the seat part in the vertical direction to adjust the height in the vertical direction.

[0008] According to this disclosure, a coil holding device is provided that can hold a coil without tilting it.

[0009] The foregoing and other objects, features and advantages of this disclosure will become more fully understood from the following detailed description and the accompanying drawings, which are given by way of illustration only, and are therefore not to be construed as limiting the disclosure. Attached Figure Description

[0010] Figure 1 This is a top view of the coil used in the comparative example.

[0011] Figure 2AThis is a cross-sectional view of the coil holding device illustrating a comparative example, showing... Figure 1 The cross section of line II-II.

[0012] Figure 2B This is a cross-sectional view of the coil holding device illustrating a comparative example, showing... Figure 1 The cross section of line II-II.

[0013] Figure 3A This is a cross-sectional view illustrating the state in which each layer of the coil floats during the measurement of the coil thickness in a comparative example.

[0014] Figure 3B This is a cross-sectional view illustrating the tilted state of the coil during the thickness measurement of the coil in the comparative example.

[0015] Figure 4A This is a cross-sectional view illustrating the staggered arrangement of the coil layers during the measurement of the coil width in a comparative example.

[0016] Figure 4B This is a cross-sectional view illustrating the tilted state of the coil during the measurement of the coil width in a comparative example.

[0017] Figure 5 This is a top view illustrating the coil of Embodiment 1.

[0018] Figure 6A This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of the VIA-VIA line.

[0019] Figure 6B This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of the VIB-VIB line.

[0020] Figure 7A This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of line VII-VII.

[0021] Figure 7B This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of line VII-VII.

[0022] Figure 8 This is a cross-sectional view of a coil holding device, illustrating another example of Embodiment 1.

[0023] Figure 9 This is a top view illustrating the coil holding device of Embodiment 2. Detailed Implementation

[0024] Hereinafter, the specific structure of this embodiment will be described with reference to the accompanying drawings. The following description illustrates a preferred embodiment of this disclosure, but the scope of this disclosure is not limited to the following embodiments. Furthermore, all structures described in this embodiment are not necessarily necessary as a means to solve the problem. For clarity, the following descriptions and drawings are appropriately omitted and simplified. In each drawing, the same reference numerals are used to label the same elements, and repeated descriptions are omitted as needed.

[0025] Before describing the coil holding device of the embodiment, the coil holding device of the comparative example will be described. Furthermore, after describing the problems of the coil holding device of the comparative example, the coil holding device of this embodiment will be described while comparing it with the comparative example. This makes the coil holding device of this embodiment clearer. It should be noted that the coil holding device and its problems of the comparative example are also included in the technical concept of the embodiment.

[0026] (Comparative example)

[0027] Figure 1 This is a top view of the coil used in the comparative example. Figure 2A and Figure 2B This is a cross-sectional view of the coil holding device illustrating a comparative example, showing... Figure 1 The cross-section of line II-II. For example... Figure 1 , Figure 2A and Figure 2B As shown, the coil 10 holding device 101 of the comparative example includes, for example, a worktable 100. The worktable 100 holds the coil 10. Therefore, the coil 10 is placed on the worktable 100. The coil 10 is used, for example, in a motor. It should be noted that the application of the coil 10 is not limited to motors.

[0028] The worktable 100 has a horizontal surface. Here, for the convenience of explaining the holding device 101 of the coil 10, an XYZ orthogonal coordinate axis system is introduced. For example, the vertical direction is set as the Z-axis direction, and the horizontal plane is set as the XY plane.

[0029] Coil 10 is, for example, a concentrated wound box coil. Coil 10 is formed by spirally stacking multiple layers of flat wire. It should be noted that coil 10 is not limited to flat wire; it can also be a structure in which other shapes of wire are spirally stacked multiple times. Coil 10 is stacked in the Z-axis direction. Coil 10 can also be a structure in which flat wire is wound into a spiral around a central axis. In this case, coil 10 is positioned with the central axis along the Z-axis direction. Coil 10 has an upper surface 11 and a lower surface 12. The upper surface 11 of coil 10 faces the +Z-axis direction, and the lower surface 12 of coil 10 faces the -Z-axis direction.

[0030] The length of the coil 10 in the stacking direction is called the thickness A1. For example... Figure 2A and Figure 2B As shown, when the stacking direction is set to the Z-axis direction, the thickness A1 is the length in the Z-axis direction. Therefore, the thickness A1 is the length in the vertical direction. The thickness A1 is the length between the upper surface 11 and the lower surface 12 of the coil 10 in the Z-axis direction.

[0031] The spacing between the flat lines in the direction orthogonal to the stacking direction of coil 10 is referred to as width A2 and width A3. For example, width A2 is the spacing between the flat lines facing each other in the X-axis direction, separated by the central axis of coil 10. Therefore, width A2 is the length between the facing sides 13 in the X-axis direction. Width A3 is the spacing between the flat lines facing each other in the Y-axis direction, separated by the central axis of coil 10. Therefore, width A3 is the length between the facing sides 13 in the Y-axis direction.

[0032] The thickness A1 of coil 10 is measured, for example, by contact measurement of probe 21. Specifically, as Figure 2A As shown, first, the probe 21 is brought into contact with the worktable 100 on which the coil 10 is placed. The probe 21 then measures the position of the lower surface 12 of the coil 10. Next, the probe 21 is brought into contact with the upper surface 11 of the coil 10. The probe 21 then measures the position of the upper surface 11 of the coil 10. Furthermore, the probe 21 measures the thickness A1 of the coil 10 by subtracting the position of the lower surface 12 from the position of the upper surface 11.

[0033] The width A2 of coil 10 is implemented, for example, by measuring an image based on projection. Specifically, as... Figure 2B As shown, a light source 22 positioned below the coil 10 illuminates the coil 10 from below. The light passing between the sides 13 of the coil 10 is captured as an image by a lens 23 positioned above the coil 10. By measuring the distance between the sides 13 of the coil 10 in the captured image, the widths A2 and A3 of the coil 10 are determined.

[0034] However, if the constraints imposed by the clamping parts of the coil 10 are inadequate, the thickness A1 cannot be accurately measured. Figure 3A This is a cross-sectional view illustrating the state in which each layer of coil 10 floats during the measurement of thickness A1 of coil 10 in a comparative example. (Example:) Figure 3A As shown, with each layer of coil 10 floating, the thickness A1 of coil 10 cannot be accurately measured. Figure 3B This is a cross-sectional view illustrating the tilted state of coil 10 during the measurement of thickness A1 of coil 10 in a comparative example. Figure 3B As shown, with coil 10 tilted, the thickness A1 of coil 10 cannot be accurately measured.

[0035] Furthermore, if the constraints imposed by the clamping members of the coil 10 are inappropriate, it is impossible to accurately measure the widths A2 and A3 between the sides 13 of the coil 10. Figure 4A This is a cross-sectional view illustrating the staggered arrangement of the layers of coil 10 during the measurement of widths A2 and A3 of coil 10 in the comparative example. (See attached image.) Figure 4A As shown, with the layers of coil 10 staggered, it is impossible to accurately measure the widths A2 and A3 of coil 10. Figure 4B This is a cross-sectional view illustrating the tilted state of coil 10 during the measurement of widths A2 and A3 in the comparative example of coil 10. Figure 4A As shown, with coil 10 tilted, it is impossible to accurately measure the widths A2 and A3 of coil 10.

[0036] The following issues were identified as the cause of this problem.

[0037] (I) The concentrated winding coil 10 is shaped into a spiral in the Z-axis direction, so it has no flat surface relative to the central axis and will tilt when placed on a plane.

[0038] (II) When the cross-section of the flat wire has a large aspect ratio (width / length) and low rigidity, the coil 10 will deform significantly due to the clamping elements. Specifically, the flat wire is flexible and will deform under small forces. For example, the layers of the coil 10 may float or become misaligned. Therefore, in concentrated winding of the coil 10, especially when (a) the product shape requirements are high and (b) the cross-section of the flat wire has a large aspect ratio (width / length) and low rigidity, it is difficult to measure the thickness A1, width A2, and width A3 with high accuracy.

[0039] (Implementation Method 1)

[0040] Next, the coil 10 holding device of this embodiment will be described. The coil 10 holding device of this embodiment solves the problems of the comparative example described above. Figure 5 This is a top view illustrating the coil of Embodiment 1. Figure 6A This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of the VIA-VIA line. Figure 6B This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of the VIB-VIB line. Figure 7A and Figure 7B This is a cross-sectional view illustrating the coil holding device of Embodiment 1, showing... Figure 5 The cross section of line VII-VII.

[0041] like Figure 5 , Figure 6A and Figure 6B, Figure 7A and Figure 7B As shown, the coil holding device 1 of this embodiment holds, for example, a multi-layered, centrally wound cassette coil 10. The holding device 1 includes a worktable 100 and a plurality of seating portions 30. The plurality of seating portions 30 seat the centrally wound cassette coil 10. The plurality of seating portions 30 include seating portion 31, seating portion 32, seating portion 33, seating portion 34, seating portion 35, and seating portion 36. When seating portions 31 to 36 are collectively referred to as seating portions 30, when a specific seating portion 30 is indicated, it is referred to by its reference numerals. The number of plurality of seating portions 30 is not limited to 6, and may be 2 to 5, or even 7 or more.

[0042] The vertical height of the seating portion 31 is a first height. The height of the seating portion 32 is a second height, different from the first height. Similarly, the seating portions 33, 34, 35, and 36 are respectively a third, fourth, fifth, and sixth height. Each seating portion 30 may also have a different height. Alternatively, several seating portions 30 may have the same height. Each seating portion 30 has a height difference A4 that matches the inclination of the coil 10.

[0043] The seating portion 30 has a seat surface 40 that contacts the lower surface 12 of the coil 10 and seats the coil 10. The seat surface 40 is, for example, the upper end face of the seating portion 30. It should be noted that the seat surface 40 is not limited to the upper end face, as long as it allows the coil 10 to sit. Figure 6A and Figure 6B To avoid complicating the accompanying drawings, several figure labels have been omitted.

[0044] The height of the seat portion 30 can also be indicated at its vertical position relative to the seat surface 40. In this case, the height is the position of the seat surface 40 in the Z-axis direction. For example, if the worktable 100 is horizontal, the height is the length between the worktable 100 and the seat surface 40.

[0045] Alternatively, the coil 10 can be fixed by pressing the upper surface 11 of the coil 10 against the fixing clamp 24 from above along the Z-axis. In addition to pressing the upper surface 11 against the fixing clamp 24 from above along the Z-axis, the coil 10 can also be fixed by pressing the lower surface 12 against the fixing clamp 24 from below along the Z-axis. Furthermore, the fixing clamp 24 can be used to clamp both sides of the base surface 40. Multiple fixing clamps 24 can also be used for fixation.

[0046] like Figure 6A and Figure 7AAs shown, for example, the seat surface 40 of the seat portion 31 may be located below the contact point in the vertical direction relative to the upper surface 11 contacted by the probe 21. This allows for the high-precision measurement of the thickness A1 of the coil 10.

[0047] Figure 8 This is a cross-sectional view of the coil 10 holding device 1a, illustrating another example of Embodiment 1. (See attached image.) Figure 8 As shown, the holding device 1a of the coil 10 may also include an adjustment mechanism 50 for adjusting the height of the seat portion 30. The adjustment mechanism 50 moves the seat portion 30 in the vertical direction to adjust the height of the seat portion 30.

[0048] Next, the effects of this embodiment will be explained. The coil 10 holding device 1 of this embodiment includes a structure with the following aspects.

[0049] (i) Match the height of the seat surface 40 of the plurality of seat portions 30 with the inclination of the lower surface 12 of the coil 10.

[0050] (ii) A seat surface 40 is set directly below the thickness measuring part, and the two sides of the seat surface 40 are clamped.

[0051] Specifically, in this embodiment, the holding device 1 supports the coil 10 on a plurality of seating portions 30 having a height that matches the inclination of the coil 10. This achieves the structure described in (i). The centrally wound coil 10 is formed in a spiral shape in the Z-axis direction, therefore it lacks a flat surface relative to the central axis and will tilt when placed on a plane. However, in this embodiment, the holding device 1 supports the coil 10 using a plurality of seating portions 30 with different heights. Therefore, the height of the seat surface 40 of the seating portion 30 can be matched to the inclination of the coil 10, thus allowing the coil 10 to be placed without tilting.

[0052] Furthermore, the contact point of the seat surface 40 of the seat portion 30 with the upper surface 11 of the coil 10 contacted by the probe 21 is located directly below it in the vertical direction. This achieves the structure described in (ii) above. When the aspect ratio (width / length) of the flat wire cross-section is large and its rigidity is low, the coil 10 may deform significantly due to the clamping members, sometimes making it impossible to accurately measure the thickness A1. However, in this embodiment, the holding device 1 provides the seat surface 40 directly below the thickness measurement area and clamps it on both sides, thus enabling high-precision measurement of the thickness A1 even with a coil 10 that has low rigidity.

[0053] Thus, according to this embodiment, the structures of (i) and (ii) can suppress the tilting and offset of the coil 10 in the XYZ axis direction and fix it, so that even the coil 10 with low rigidity can be measured with high accuracy, such as the thickness A1, width A2, and width A3. In addition, the same posture can be constrained for each measurement, which can improve the repeatability of the measurement.

[0054] (Implementation Method 2)

[0055] Next, the retaining device for the coil 10 in Embodiment 2 will be described. The retaining device in this embodiment widens the contact surface of the clamping member. Figure 9 This is a top view illustrating the coil holding device of Embodiment 2. Figure 9 As shown, in addition to the structure of the holding device 1 described above, the coil 10 holding device 2 of this embodiment also includes an X-axis direction reference 25, an X-axis direction clamping member 26, a Y-axis direction reference 27, a Y-axis direction clamping member 28, and a plurality of springs 29.

[0056] The X-axis reference 25 and the X-axis clamping member 26 clamp the flat wire or other conductor in the coil 10 in the X-axis direction. The coil 10 is rectangular in shape, with the Y-axis as the longer side and the X-axis as the shorter side when viewed from the Z-axis direction. The X-axis reference 25 is brought into contact with the inner side 13 of the coil 10, and the X-axis clamping member 26 is brought into contact with the outer side 13. Then, the flat wire is clamped by the force of the spring 29 connected to the X-axis clamping member 26. In this case, the contact surface between the X-axis reference 25 and the X-axis clamping member 26 and the flat wire becomes wider. Specifically, the X-axis reference 25 and the X-axis clamping member 26 clamp the flat wire in the straight section A5 of the coil 10 extending along the Y-axis direction.

[0057] The Y-axis reference 27 and the Y-axis clamping member 28 clamp the flat wire or other conductor in the coil 10 in the Y-axis direction. The Y-axis reference 27 is brought into contact with the outer side 13 of the coil 10, and the Y-axis clamping member 28 is brought into contact with the inner side 13. Then, the flat wire is clamped using the force of the spring 29 connected to the Y-axis clamping member 28.

[0058] As described above, when the cross-section of a flat wire has a large aspect ratio (width / length) and low rigidity, the layers of coil 10 are prone to misalignment. Therefore, in order to eliminate layer misalignment and ensure that the layers of coil 10 are neatly arranged, a larger contact surface is used for fixing in the coil straight section A5, which is the long side of coil 10. For example, the X-axis reference 25 and the X-axis clamping member 26 clamp more than 80% of the long side of coil 10 as the coil straight section A5. With such a structure, the tilting and offset of coil 10 in the XYZ axis direction can be suppressed and fixed, and even with coil 10, which has low rigidity, the dimensions of coil 10, such as thickness A1, width A2, and width A3, can be measured with high accuracy. Other structures and effects are described in Embodiment 1.

[0059] The embodiments of this disclosure have been described above, but this disclosure includes appropriate modifications that do not impair its purpose and advantages, and is not limited to the above embodiments. Furthermore, the structures in Embodiment 1 can also be appropriately combined.

[0060] From this description of the present disclosure, it will be apparent that embodiments of the present disclosure can be modified in various ways. These modifications should not be considered a departure from the spirit and scope of the present disclosure, and it will be apparent to those skilled in the art that all such modifications are intended to be included within the scope of the following claims.

Claims

1. A method for measuring a coil using a coil holding device, wherein the coil holding device holds a multi-layered, centrally wound, box-type coil, wherein... The coil holding device includes multiple seating portions for seating the concentrated wound cassette coil. The plurality of seating portions include a first seating portion having a vertical height of a first height and a second seating portion having a second height different from the first height. The centrally wound box-type coil has an upper surface and a lower surface. Each seating portion has a seat surface that contacts the lower surface and allows the concentrated wound cassette coil to be seated. The contact point of the first seat surface of the first seat portion with the upper surface of the probe measuring the thickness of the concentrated wound cassette coil in the vertical direction is located below in the vertical direction. The thickness of the concentrated wound cassette coil in the vertical direction is determined based on the position of the first seat surface where the probe contacts the coil and the position of the upper surface where the probe contacts the coil.

2. The measurement method using a coil holding device according to claim 1, wherein, The coil holding device also includes an adjustment mechanism that moves the seat portion along the vertical direction to adjust the height in the vertical direction.

Images