JPH0252860A - Coil device - Google Patents

Abstract

PURPOSE:To stably attain the multi-stage winding of a coil and to realize an aligned and high density winding by forming a first groove part consisting of a plurality of lines and a second groove part formed at a position separated from both the ends of the first grove part and shifting the first groove part from the second groove part. CONSTITUTION:A line 2 wound on a first parallel groove part 1d from a guide groove 1j is elevated in a lead shape by making a second inclined groove part 1j as a guide and wound on a second parallel groove part 1f, then, moved to the groove part 1d through a first inclined groove part 1h. Thus, the line 2 passes the changing area of a wire rod position twice during one winding. The amount of one change is substantially 1/2 as wide as the diameter of the wire rod. Thus, the line reaches to the final winding 6 of a first stage. The start winding line 7 of a second stage has a gap between the winding 6 and the end face 1c1 of a second flange part 1c narrowed. The winding 7 is gradually applied by the force of the direction of a major diameter. The winding 7 is held at a trough part b and moved to the second stage. A second winding 8 on the second stage is moved from the trough parts c to d and stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coil device applied to, for example, a magnet switch coil of a starter or a rotor coil of an alternator.

[Conventional technology]

As shown in Japanese Utility Model Application Publication No. 61-88972, in the conventional method, a plurality of guide grooves are provided on the outer peripheral surface of the winding drum, and the area where the winding row of the winding is changed is a smooth surface without guide grooves. By doing so, reliable aligned winding of the first stage is achieved.

[Problem to be solved by the invention]

Conventional aligned winding can reliably achieve aligned winding in the first stage, but when winding coils in multiple stages, it becomes impossible to perform aligned winding of the coils. There was a point.

The inability of conventional winding devices to perform aligned winding will be explained below with reference to FIGS. 22 to 30.

FIG. 22 shows the bobbin shown in Japanese Utility Model Application Publication No. 61-88972, during which the coil is being wound into the second stage. In the bobbin, a plurality of parallel grooves are continuously formed, and a part of the circumference has no grooves and is a smooth surface. Since the smooth surface is characterized by a wire rod change area θ2 (Fig. 23) during winding, the wire rod change area at the innermost point is concentrated on a part of the circumference, It can be said that the amount of movement of the wire rod being wound into the adjacent groove is approximately equal to the pitch amount of the grooves, that is, the wire rod diameter.

Therefore, first of all, the behavior of the wire at the position where it is wound around the bobbin in the inter-stage transition area where the coil moves from the first stage to the second stage in the transition area θ2 is shown in Figure 24 (a).
) to g) will be explained. Figure 24(a)
The wire rod 24a shown by has finished winding the bobbin end surface 23a, and
As shown in FIG. 4(b), while closely contacting the changing area curved surface 25b of the adjacent lower stage NfA 25a and being sandwiched between the bobbin end surface 23a, as shown in FIGS. 24(C) to (f). motion is applied in the outer radial direction. Immediately after reaching the top of the lower line 25a, the adjacent lower line 26a
The tension acting on the wire rod toward the trough C generated between the lower wire 25a causes it to move in an arc around the outer periphery of the lower wire 25a. 25th
The figure shows the movement of the winding point of the wire 24a until it reaches the trough C.

Therefore, in the conventional wire rod step change section, the change region θ2 shown in FIG. The change in motion of the wire in the section is from the starting point E1 to the point F in Figure 24).
The circular arc movement from the ten points F to the end point G+ at the trough C must be performed continuously. Therefore, the 24th
At point F shown in Figure (C), the wire 24a is lower line 25.
The force pushed up in the outer radial direction by a and the bobbin end face 23a overcomes the tension force that tries to pull the wire 24a into the trough C and the frictional force acting between the wire 24a and the lower wire 25a, and the trough C. A problem arose in that the object passed through C and moved to the adjacent valley d, as shown by the solid line in FIG. Therefore, as shown in FIGS. 26(a) and 26(b), a gap is created in the first winding part SI of the second stage, and the next stage (
In other words, the winding (3rd stage) would fall into the core, causing irregular winding.

Next, changes in the amount of wire rod from the second winding to the final winding within the same membrane after the second stage winding will be explained. FIG. 27 shows lower lines 25a and 26a of the winding portion.

28a, 29a, and second dashed lines 27a, 30a are locally drawn. 28(a) to d) show stepwise the behavior of the wire in the wire changing region θ2 shown in FIG. 27. The wire 27a during the second stage winding is shown by the lower line shown in FIG. 28(a). When the winding of the valley d that occurs between 26a and 28a is completed, the curved surface of the changed portion of the underlined portion 28a and the change of the winding wire 30a contact the changed portion of the lower line 28a shown in FIG. If an arcuate motion is given along the section 30b and the curve reaches the top of the lower line 28a shown in FIG. 28(C),
The wire 27a should move to the trough e in the changing area of the lower lines 28a and 29a, but as is clear from FIG.
The lower wires 28a and 29a are in close contact, and the wire 27a
is a left-handed twisting change that is opposite to the lower line, and because it has to go over the lower line in a so-called Valley f of lower lines 29a and 31a shown in figure (d)
I will go to

That is, the wire amount change is at point E! in FIG. From point G,
As shown in FIG.
movement) Ten straight line movement (as shown in Fig. 28(C), the wire 27a moves on the lower line 29b) Ten circular arc movement (as shown in Fig. 28(d), the wire 27c moves to the trough f) There was a problem in that the three parties had to perform the process consecutively.

As mentioned above, in the conventional method, the changing part between the wires is concentrated in a part of the circumference, as shown in Fig. In this case, the upper wire must ride over the lower wire twice. Therefore, as shown in FIG. 29, at 1 o'clock in the middle of the crossing, the wire rod 27a has a combined force of the changing pressure angle α,° caused by the changing area IL and the position change I x I and the tension force applied to the wire rod. Lower lines 29a, 31
It overcomes the force trying to pull it into the trough f of a and causes sideslip on the lower lines 28a and 29a, as shown in Fig. 30 (
As shown by the solid line in a), a problem occurred in which the object moved to the adjacent valley g. For these reasons, as shown in FIG. 30(b), a gap is created in the second winding part S2 of the second stage winding,
The next stage winding would fall into the core, causing irregular winding just like the transition between stages.

As mentioned above, in the first step-to-step change section and the second wire-to-wire change section, the change section is concentrated in a part on the circumference, and the amount of wire change must be moved by an amount that is approximately the same as the wire diameter. Therefore, the wire rod cannot be changed stably, and gaps are created between the wire rods, and the wire rods fall into the gaps, resulting in irregular winding.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coil device that can extremely stably perform multi-stage winding of a coil and perform aligned high-density winding.

[Means to solve the problem]

In order to achieve the above object, in the coil device of the present invention, a plurality of first grooves are formed on the coil winding surface of the bobbin, and second grooves are formed at positions apart from both ends of these first grooves. , and the first groove and the second groove are offset from each other.

〔Effect of the invention〕

As described above, in the present invention, the behavior of the wire during winding is small and it is difficult to slip, and changes between stages and the amount of wire can be performed, and multi-stage winding of two or more stages is extremely stable and aligned winding. There is an effect that lines can do.

In addition, by improving the rotational balance of the product, it has become possible to significantly reduce losses such as wire rod disposal due to defective products and balance correction man-hours, which were conventionally provided.

(Example) Hereinafter, an example of the present invention shown in the drawings will be explained.
The figure is a plan view of bobbin 1, and Figure 12 is the ■ in Figure 1.
It is a sectional view taken along the line -■, and the structure of the bobbin I will be described below.

The bobbin 1 has a cylindrical winding surface 1a around which a coil is wound, and first winding surfaces 1a formed at both ends of the winding surface 1a at right angles to the axis. It is composed of second flange parts 1b and lc. The bobbin 1 is usually made of resin, but it can also be made of a hard material other than resin.

Further, in a part of the circumference of the winding surface 1a, from the inner circumferential surface 1b+ of the first flange part 1b, there is a direction parallel to the first and second flange parts 1b, lc, and therefore parallel to the axis of the bobbin l. Five first parallel groove portions ld are formed in the first parallel groove portions ld. Groove 1
The number of grooves d is not necessarily limited to five. Furthermore, there is a first groove between the first groove 1d closest to the second flange IC and the inner circumferential surface 1c+ of the second flange 1c. A first protrusion 1e having a width of 1/2 of the width P of 1d is formed.

Further, in the remaining portion of the winding surface 1a, a first flange portion lb and a second flange portion lb are provided on the first flange portion lb side from the inner circumferential surface IC+ of the second flange portion IC.

Five second parallel grooves 1f are formed parallel to lc. Then, the second groove portion 1 on the first flange portion lb side
A second protrusion 1g having a width of 1/2 of the width P of the first and second grooves 1d and if is formed between f and the inner circumferential surface lb of the first flange portion 1b. has been done.

Further, the first and second groove portions 1d and If are formed at symmetrical positions between the first angle θ1, as shown in FIG. 2, respectively.

1st. According to the results of tests conducted by the inventors, the distance from the inner wall surface of the second flanges lb, lc to the center of the groove width of the first groove near each flange lb, lc (see the straight line in Fig. 3) is , where the protrusions 1g and 1e exist, P
(Tolerance + 0.2 P), and the protrusion 1g
, 1e does not exist, P/2 (tolerance +
It is preferable to set this to 0.2 P) because the distance from the center of the groove width of the first groove to each flange lb, lc.

If the distance from the center of the groove width of the first groove to the side surface of the protrusion 1g (the width in the axial direction of leC is P/2) is less than 272, the wire wound in the first groove This is because the wire ends up higher than the wire wound in the groove, which tends to cause random winding.

On the other hand, regarding the relationship between adjacent grooves other than the first groove, according to the results of the inventors' tests, the distance from the adjacent groove boundary line to the center of the groove width is P/2 (0, 2 P in terms of tolerance). It is preferable to set this value to 0.3P.The reason why it is possible even if the minimum value is 0.3P is because there are narrow grooves in some parts due to the relationship between the wires wound multiple times on the winding surface 1a of the bobbin 1. This is because winding is also possible. However, when the number of windings on the winding surface 1a is, for example, 5, the length of the winding surface of the winding surface 1a must be at least 5P.

As shown in FIG. 1, the first and second groove portions ld and i
f is approximately 1/2 of the width P of the groove in the axial direction (P/
2) The tolerance for deviation is ±0.2P. This value was confirmed as a result of experiments.

Further, between the first groove portion 1d and the second groove portion if, there are first and second inclined groove portions lh that connect these groove portions 1d and if and correct a width deviation of P/2.

1i are formed respectively. As shown in FIG. 2, these inclined groove portions 1h and 1i are formed at symmetrical positions between the second angle θ2 forming the change range.

1st. As shown in FIG. 18, the shape of the second grooves 1d and If is determined by selecting the width and depth of the grooves so that the winding wire can be formed on the inner wall surfaces of both grooves facing each other in a virtual plane orthogonal to the axis. The intersection angle (β) of two close lines passing through the contact point where they touch is 90
It is preferable to have a cross-sectional shape with an angle of -120 degrees in order to restrain the wound wire within the groove.

Furthermore, 1j is a guide groove formed in the first flange portion 1b for guiding the coil 2 onto the winding surface 1a of the bobbin 1.

Next, a round wire is wound around the bobbin 1. The wire diameter d of this coil 2 is approximately the same as the width P of the first and second parallel groove portions 1d and if. The wire 2 fixed to the clamp jig 12 passes through the winding start guide groove lj and reaches the first flange part I of the bobbin 1.
It begins to be wound around the first parallel groove portion 1d on the b side. Bobbin 1
is connected to a drive motor (not shown) and is driven and rotated by the motor. The bobbin 1 rotates clockwise as shown by the arrow in FIG. The wire 2 is supplied while traversing toward the bobbin 1 by a wire supply mechanism (not shown). When the wire is fed while being traversed, the movement of the wire is reduced, the bobbin can be rotated faster, and the wire can be easily aligned and wound.

The wire 2 wound around the first parallel groove part 1d begins to ascend in a lead shape guided by the second inclined groove part 11 that continues with the next second parallel groove part 1f, and is wound to the next second parallel groove part 1f. equipped.

In this case, the amount of lead rise is approximately 1/2 of the wire (P/2
). When it continues to be wound around the second parallel groove part If, it moves to the first parallel groove part 1d via the first inclined groove part 1h. The amount of lead rise in this case is also approximately 1/2 of the wire diameter.

Therefore, while the wire 2 is wound once on the winding surface 1a of the bobbin L, a region (θt) of changing the wire position is provided twice, and the amount of change per time is approximately 1/2 of the wire diameter. It is. Then, the first stage first winding wire 3 is wound. This repetition is repeated a plurality of times, and 0 or more of the first-stage final wrapping cotton 6 are in the state of the first-stage winding on the bobbin 1.

Next, as shown in FIG. 4, the transition between stages when the line moves from the first stage to the second stage will be explained. The bobbin 1 of the present invention has a first bobbin 1 having a width of approximately d/2 (P/2). Second protrusion 1
e, has Ig. Therefore, as shown in FIG. 4, a gap of approximately 1/2 of the wire diameter always occurs between the first stage fourth winding wire 6 of the wire 2 and the end surface 1c+ of the second flange portion 1c. Therefore, the behavior of the wire rod from the first stage winding to the second stage winding on bobbin 1 a is as shown in Figures 9 to 11.
The result will be as shown in the figure.

FIG. 9 shows a state where the final winding wire 6 in the first stage starts to change to the second stage. Depending on the amount of rise of the lead of the wire 6, the gap between the final winding wire 6 and the end surface 1c+ of the second flange portion 1c becomes narrower, as shown at a in FIG. Then, as shown in FIG. 10, force is gradually applied to the second stage starting winding wire 7 in the outer diameter direction. Thereafter, as shown in FIGS. 5, 7, and 9(C), the second stage starting winding wire 7 connects the first stage final winding wire 6 and the end surface 1c+ of the second flange portion IC. It is held on the valley between the two and moves to the second stage.

From the above, conventionally, as shown in FIG.
However, in the present invention, as shown in Fig. 10, the change between stages can be made with a simple movement of radial direction from the starting point E to the ending point G. ,
Moreover, the momentum of the second-stage starting winding wire 7 in the radial direction is also smaller than the conventional momentum H, and the effect of sliding toward the adjacent valley is completely eliminated.

As shown in FIGS. 6 and 8, the second stage starting winding wire 7 is located between the first stage third winding wire 5 and the final winding wire 6 on the change area θ2. It settles into the valley C and is held there.

Next, we will explain the movement of the wire in the second to final winding of the same role in the second and subsequent stages, that is, the wire opening degree adjustment part.As shown in FIG. The changing part θ2 is divided into two places on the circumference, and the amount of continuous parallel grooves is approximately 1/1 of the wire diameter.
2, as shown in FIG.
When moving to the trough d of the dashed line 4°5, the vehicle crosses the top e of the first dashed line 5 only once. That is, the winding wire 8
When the winding is wound one turn, the windings pass over the top of the first dashed line twice every half turn.

The changing state of one crossing is shown in FIGS. 12(a) to d). Therefore, the second stage second winding wire 8 is
As shown in Fig. 18, the trajectory of the change in the wire moving from the trough d to the trough d is such that the position can be changed by a simple arc movement, and the amount of change! ,
is only 1/2 of the wire diameter d, and the changing part pressure angle α2 is also reduced by half. In the conventional method, the wire rod is changed at one point on the circumference, so the number of wires that cross the lower line at a time is two, as shown in Fig. 28 (a) to d), and as shown in Fig. 29. As shown, the wire rod changes due to three movements: circular arc motion + linear motion element circular motion, and the wire slipping in the linear motion section was a problem in the wire rod related section of the present invention. By making one crossing over the first dashed line, that is, crossing over twice in one rotation, the locus of wire change is made into a simple arc movement, and the amount of change! □
, and the changing pressure angle α2 can both be reduced to 1/2 of the conventional values.

As a result, the effect on wire slipping is halved, and the acceleration according to the changing pressure angle is also reduced, reducing the speed at which the lower line crosses the top, making extremely stable line-to-line changes possible. .

Therefore, as shown in FIGS. 14 and 15, when the wire 2 is stacked in one stage and the movement of the wire of the wire 2 becomes stable, even in multi-stage winding, reliable aligned winding can be performed.
be able to.

Second, as shown in FIGS. 2 and 3, by dividing the wire rod changing region θ8 into two opposing positions, the radius R1 of the region θ2 after winding is as shown in FIG. As shown, since the dimensions are almost the same, the rotational balance of the wrapped product is maintained, and there is no need to correct the balance after winding.

As shown in FIG. 16, the first protrusion 1e and the second protrusion 1g are formed at positions 180 degrees opposite each other, but as shown in FIG. Part 1e
and the second protrusion 1g may be formed on the same side.

Further, in the embodiment, a round wire was used as the wire material, but as shown in FIGS. The upper wire space factor may be improved.

Further, the present invention provides a rectangular bobbin 1 as shown in FIG.
′ can also be used.

In addition, in the present invention, the first and second inclined groove parts 1h and li are respectively formed between the first parallel groove part 1d and the second parallel groove part 1f.
The inclined groove portions 1h and 1h may not be formed, but may be formed as arcuate smooth surfaces.

Further, the first parallel groove part 1d and the second parallel groove part If are formed parallel to the eleventh and second flange parts 1b and lc, but the first and second parallel groove parts 1d and lc are formed parallel to each other. On the other hand, there is no problem even if they are not parallel and are slightly inclined.

Further, the circumferential width of the first and second inclined groove portions 1h and If (
The second angle θ2) is preferably set so that when the wire diameter of the wire 2 is about 111 m1, the angle α2° shown in FIG. 11 is about 1 degree.

In addition, in the above embodiment, the first parallel groove part 1d and the second parallel groove part if are shifted by 1/2 of the width P of the groove part, but due to manufacturing errors, the amount of shift is slightly more than P/2. There is no problem even if it deviates.

If the above-mentioned deviation amount becomes greater than P/2, when the wire 2 is wound on the bobbin 1 in multiple stages, the first and second flange portions 1b and lc sides of the bobbin 1 will become as shown in FIG. Therefore, the more the wires are stacked in multiple stages, the more the wires become tilted, the gap between the valleys between the wires becomes smaller, and the alignment of the wires 2 on the flange portions 1b and lc becomes more likely to collapse. Therefore,
The amount of deviation may be set appropriately according to each condition (the diameter of the wire, the number of stages to be wound, etc.) so that aligned winding can be performed when the wire is wound in a predetermined stage.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the bobbin of the coil device of the present invention, and FIG.
The figure is a cross-sectional view of the bobbin in Figure 1 taken along the line Fig. 5 is a front view showing the state immediately before the winding changes to the second stage in Fig. 4 and has been rotated approximately 90 degrees, Fig. 6 is a front view showing the state immediately after the winding in Fig. 7 is a sectional view taken along the line ■-■ in FIG. 5, and FIG. 9 (a), (C) are cross-sectional views taken along the line ■-■, showing the behavior of the wire from the start to the end of the change at the step-to-step change section in the bobbin in Fig. 1. FIG. 10 is a schematic diagram showing the locus of the wire rod at the interstage transition part of bobbin winding of the present invention, and FIG. 11 is a cross-sectional view showing the state of winding with the bobbin of the present invention, as shown in FIG. 6. FIG. 12(a) is a front view showing the main part to show the wire rod opening degree changing section which finishes the first winding of the second stage and moves to the second winding. (b), (C1, (6) is the 11th bobbin winding of the present invention
13 is a schematic diagram showing the locus of the wire that behaved in FIG. 12, and FIG.
A front view showing the state where the final stage winding is completed and the winding is about to proceed to the third stage.
16 is a sectional view of a coil device using the bobbin of FIG. 1, FIG. 17 is a sectional view of a coil device using another embodiment of the bobbin of the present invention, and FIG. 18 is a front view showing the plane of symmetry. 19(a) is a sectional view showing the cross-sectional shape of a groove formed on the wire winding surface of the bobbin and the relationship between the groove and the wire; FIG. 19(a) is a sectional view of a coil device wound with a square wire; Figure 19(b)
is a cross-sectional view of a coil device wound with a hexagonal wire;
Fig. 0 is a perspective view of a coil device wound around a rectangular bobbin, Fig. 21 is a sectional view showing another embodiment of the coil device of the present invention, and Fig. 22 is a conventional bobbin in which a wire is wound up to the second stage. Figure 23 is a front view showing the installed state, and xx in Figure 22.
Cross-sectional view along line n-xxn, Figures 24(a) to 9
) is a sectional view showing the change in behavior of the wire from the first stage to the second stage wound with a conventional bobbin. Second
Schematic diagram showing the trajectory showing the behavior of the line in Figure 4, Part 2
Figures 6(a) and 6(b) are a front view and a sectional view showing the state when the inter-stage transition part becomes abnormally wound, and Figure 27 is the 2nd
2 is a front view showing the main part of the wire rod opening portion during the second winding of the second stage, and FIGS. 28 (a) to d) are
29 is a schematic diagram showing the trajectory of the wire in FIG. 28; FIG. 30(a), (b) ) is a front view and a sectional view showing a state when the wire rod opening portion is abnormally wound. 1...Bobbin, la...winding surface, lb, Ic...
First, second flange portions, ld, If...first, second
groove portions, lh, li...first and second inclined groove portions, 2.
··line. θ2...change area.

Claims (1)

[Claims] (1) A bobbin having a cylindrical portion and first and second flange portions formed at both ends of the cylindrical portion and substantially perpendicular to the cylindrical portion; In a coil device comprising a coil wound on a cylindrical part of a bobbin, a first groove part in a part of the cylindrical part is substantially parallel to the flange part and is arranged in parallel. The remaining portion on the cylindrical portion is formed at a pair of predetermined intervals from both ends of the first groove portion, and is approximately parallel to and adjacent to the flange portion. a plurality of mutually parallel second grooves having a groove width center interval of P, the first groove and the second groove,
A coil device characterized in that the coils are shifted from each other by an amount equal to or less than a groove width center spacing P. (2) Claim (1) characterized in that first and second inclined grooves are formed between the first groove and the second groove to connect these grooves. Coil device as described. (3) The coil device according to claim 1 or 2, wherein the amount of displacement between the respective corresponding grooves of the first groove portion and the second groove portion is approximately P/2. (4) A first protrusion having a width half the width of the groove is between the first groove on the first flange side and the first flange on the second flange side. The coil device according to claim 3, wherein a second protrusion having a width half that of the groove is formed between the second groove and the second flange. . (5) The coil device according to claim 1 or 4, wherein the pair of predetermined intervals are formed at substantially opposing positions. (6) In a coil device equipped with a bobbin having a winding surface for winding a wire, the winding surface of the bobbin is provided with a plurality of mutually parallel stripes having a groove width center interval of P between adjacent grooves. a first groove portion, and a plurality of mutually parallel second groove portions located at a position away from both ends of the first groove portion and having a groove width center interval of P between adjacent grooves, The first groove and the second groove have a target value P/2,
A coil device characterized by being offset from each other in the axial direction by a tolerance of ±0.2P. (7) A pair of gap portions that are present between both ends of the first groove portion and the second groove portion and have a predetermined width in the circumferential direction are formed at positions substantially opposing each other across the axis. The coil device according to item (6).