JP2004200545A - Air core coil winding device - Google Patents

Abstract

[PROBLEMS] To make an air core 15 coil having a constant opening angle α between both terminals 16, 17, it is necessary to use an expensive pulse motor or servo motor capable of controlling rotation with high accuracy, and the winding device is costly There was a problem of getting high.
A passive spindle (20) and a rotary drive unit (30) having a rotary spindle (41) opposed to the passive spindle (20) on an axis (A) and movable in the direction of the axis (A) are provided.
The rotation drive unit 30 includes a rotation shaft 40 having a rotation spindle 41, a flyer 42, and a gear 43 rotatable around the axis A and having a through hole formed in the shaft core, a tension mechanism incorporated in the flyer 42, and a rotation mechanism. A mandrel 60 is movably mounted in the through hole of the shaft 40, and a rack gear 50 that rotates the rotation shaft 40 via the gear 43 during linear movement in a predetermined section. One end of the wire 10 unwound from the bobbin 7 can be held by the flyer 42 through the space between the passive spindle 20 and the rotary spindle 41.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a winding device for an air-core coil, and more particularly to a winding device having a simple structure suitable for manufacturing an air-core coil having a small number of turns.
[0002]
[Prior art]
As a conventional air-core coil winding device, for example, there is one disclosed in Patent Document 1. In this structure, the spindle (7a) is rotated while one end of the wire is held by the clamp (7b), and the wire is wound around the spindle (7a) to form an air-core coil. Further, Patent Document 2 discloses a winding device that performs winding by rotating a flyer (43) holding a wire, which is a winding device that performs winding on a drum core instead of an air-core coil. .
[0003]
[Patent Document 1] JP-A-6-302452 (FIG. 1 and its description)
[Patent Document 2] JP-A-2001-267171 (FIG. 1, paragraph 26)
[0004]
FIG. 8 is a plan view of the air core coil. The air-core coil 15 is used by being mounted on a printed board, a lead frame, or the like. At this time, the terminals 16 and 17 of the air-core coil 15 are connected to different electrodes, respectively, but in order to facilitate this mounting work, the open angle α of the two terminals 16 and 17 pulled out is It needs to be constant.
[0005]
[Problems to be solved by the invention]
However, in order to create an air-core 15 coil in which the opening angle α of both terminals 16 and 17 is constant by the above-described conventional winding device, it is not necessary to use an expensive pulse motor or servomotor that can accurately control the rotational position. However, there is a problem that the cost of the winding device is increased. An object of the present invention is to provide an air-core coil winding device having a simple structure in which the opening angle α of the terminals 16 and 17 can be easily set to an arbitrary value.
[0006]
[Means for Solving the Problems]
The present invention includes a passive spindle 20 and a rotary drive unit 30 having a rotary spindle 41 facing the passive spindle 20 on the axis A and movable in the direction of the axis A, and winding the wire 10 unwound from the bobbin 7. In a winding device of an air-core coil for forming an air-core coil by wire, a rotary shaft 40 rotatable around an axis A, having a rotary spindle 41, a flyer 42, and a gear 43, and having a through hole formed in the shaft core, A tension mechanism incorporated in the flyer 42, a mandrel 60 movably mounted in a through hole of the rotary shaft 40, and a linear section that is linearly movable in a predetermined section and rotates the rotary shaft 40 via the gear 43 when moving. The rack gear 50 is provided on the rotation drive unit 30, and one end of the wire 10 that is unreeled from the reel 7 and passed between the passive spindle 20 and the rotation spindle 41 can be held by the flyer 42.
[0007]
【Example】
1 and 2 show an embodiment of the present invention. FIG. 1 is a plan view showing a schematic configuration of a winding device, and FIG. 2 is a winding device partially cut away at the position of an axis A. It is a front view of a principal part. A tension device 2, a bearing 3, a fixing plate 4, an air cylinder 5, and pins 6 (FIG. 2) are fixedly provided on the base 1. The base 1 is shown only in FIG. 1 and is not shown in FIG. 2 and subsequent figures.
[0008]
The tension device 2 includes a pedestal 2b fixed to the base 1 and a wire holding unit 2a supported by the pedestal 2b. The tip of the wire holding portion 2a opens when the left end in FIG. 1 is pushed by a frame 31 described later, and when the pushing force is released, the tip is closed by the force of a built-in spring and the wire drawn out from the bobbin 7 Hold 10 elastically. When the wire 10 is pulled, tension is applied to the wire 10 by frictional resistance of the wire holding portion 2a. The bearing 3 is provided with a passive spindle 20 rotatable about an axis A. A recess 21 is formed at the center of the tip of the passive spindle 20.
[0009]
A rotation drive unit 30 is mounted on the base 1 so as to be able to reciprocate between two points along the axis A. The rotation drive unit 30 includes a frame 31, a rotation shaft 40 supported by the frame 31 and rotating around an axis A, and a rack gear 50 movable in a direction orthogonal to the axis A. At one end of the rotating shaft 40, a rotating spindle 41 and a flyer 42 which are opposed to the passive spindle 20 on the axis A are fixed. A gear 43 (FIG. 2) is further fixed to the rotating shaft 40, and the gear 43 is meshed with the rack gear 50. When the rack gear 50 is moved in the longitudinal direction, the rotating shaft 40 rotates about the axis A together with the rotating spindle 41 and the flyer 42.
[0010]
The rotation drive unit 30 is driven by the air cylinder 5 to perform reciprocation between two points, that is, advance leftward and retreat rightward in the figure. FIGS. 1 and 2 show a case where the rotary drive unit 30 is at the retracted position. Stoppers 51 and 52 are attached to both ends of the rack gear 50, respectively. When the stoppers 51 and 52 abut a part of the frame 31, the movement range of the rack gear 50 is limited. 51a and 52a are screws for adjusting the position of the stopper, and 55 is a handle used to manually move the rack gear 50.
[0011]
The rotary shaft 40 has a through hole formed through the shaft core, and a mandrel 60 is mounted in the through hole. Mandrel 60 is movable in a direction along axis A and rotates about axis A. A gear 61 is fixed to the mandrel 60. The rotation of the rotating shaft 40 is transmitted to the shaft 60 at a reduced speed via the gear 43 and the reduction gears 62 and 63 rotating about the shaft B (FIG. 2). This reduction ratio is set so that, for example, the mandrel 60 rotates in the same direction at half the rotation speed of the rotating shaft 40. The mandrel 60 is urged leftward in the figure by a spring 65.
[0012]
The flyer 42 has a built-in tension mechanism. The tension mechanism of the present embodiment includes a clamper 42b biased by a spring 42a. When the clamper 42b is pushed by the fixing plate 4 from behind, the tip is opened as shown in FIG. On the other hand, when the clamper 42b is separated from the fixing plate 4, the clamper 42b is closed by the force of the spring 42c, and holds one end of the wire 10 firmly. At this time, when the wire 10 is pulled toward the bobbin 7, the clamper 42b moves in the axial direction of the rotating shaft 40 while compressing and compressing the spring 42a. Therefore, a predetermined tension can be applied to the wire 10 by selecting a spring 42a having an appropriate strength.
[0013]
A lever 35 as shown in FIG. 2 is attached to the frame 31 of the rotation drive unit 30. The lever 35 is rotatable about a shaft 36. When the rotary drive unit 30 is retracted to the right, the lower part of the lever 35 is rotated by hitting the pin 6 to compress the spring 65 and retreat the mandrel 60 to the right. That is, due to the action of the lever 35, the mandrel 60 is retracted by a distance longer than the retreat distance of the rotating shaft 40, and the tip of the mandrel 60 is housed in the rotating spindle 41 as shown in FIGS. On the other hand, when the rotary drive unit 30 is in the forward position as shown in FIG. 3, the mandrel 60 projects from the rotary spindle 41 and the tip enters the recess 21 (FIG. 2) of the passive spindle 20. As a result, the mandrel 60 is stretched between the rotary spindle 41 and the passive spindle 20.
[0014]
Next, the operation of the winding device will be described. First, as shown in FIG. 1, the wire 10 is pulled out from the winding frame 7 and its end is placed on a portion of the flyer 42 that opens and closes the clamper 42b. At this time, the wire 10 passes between the passive spindle 20 and the rotary spindle 41 via the wire holding portion 2a of the tension device 2.
[0015]
Then, when the air cylinder 5 is operated to advance the rotary drive unit 30, the state shown in FIGS. 3 and 4 is obtained. At the same time as the clamper 42b of the flyer 42 closes and clamps the tip of the wire 10, the wire holding portion 2a of the tension device 2 is also closed. A mandrel 60 in which the lever 35 is disengaged is pushed by a spring 65 and protrudes between the rotary spindle 41 and the passive spindle 20. The interval between the rotary spindle 41 and the passive spindle 20 at this time is set in advance according to the height of the air-core coil to be obtained.
[0016]
From the state of FIG. 3, the handle 55 is pulled downward in the figure to move the rack gear 50, and the flyer 42 is rotated together with the rotating shaft 40 to perform winding. FIG. 5 shows a state where the handle 55 is pulled halfway, and FIG. 6 shows a state where the handle 55 is pulled to the final position. The rotating shaft 40 is rotationally driven by the moving rack gear 50, and the flyer 42 rotates about the axis A together with the rotating shaft 40. As a result, the wire 10 is wound around the mandrel 60, and an air-core coil is formed. At the final position, the stopper 51 abuts on the frame 31, the rack gear 50 stops, and the winding operation ends.
[0017]
During this winding operation, the mandrel 60 also rotates at half the number of rotations in the same direction as the rotation direction of the rotating shaft 40. Therefore, when viewed from the mandrel 60 as a reference, the air core coil formed around the mandrel 60 has a shape in which both ends are wound simultaneously and at the same speed from the opposite direction. Therefore, when an air-core coil wound in two or more layers is wound by this winding device, a coil in which both ends are located on the outside, that is, a so-called outer-outer coil is obtained.
[0018]
In the state of FIG. 6 after the completion of the winding, the portion of the wire 10 stretched between the mandrel 60 and the tension device 2 is cut. Then, when the rotary drive unit 30 is retracted by the air cylinder 5, the wire holding unit 2a and the clamper 42b open as shown in FIG. As a result, the air-core coil 15 in which the winding is completed as shown in FIG. 8 falls by its own weight.
[0019]
In the embodiment, as the tension device for applying tension to the wire 10 at the time of winding, a friction utilizing type is used on the winding frame side and a spring utilizing type is used on the flyer side, but any type of tension device may be used. When a spring-based type is used for the tension device on the reel side, a mechanism similar to the tension mechanism of the flyer 42 provided on the rotary spindle 41 may be fixed to the bearing 3 of the passive spindle 20.
[0020]
The opening angle α of both ends 16, 17 of the air core coil 15 can be set to an arbitrary angle by adjusting the positions of the stoppers 51, 52. Further, the rack gear 50 may be driven by a motor or an air cylinder instead of manually. In such a case, it is preferable to turn on and off the motor and the air cylinder with switches associated with the stoppers 51 and 52.
[0021]
【The invention's effect】
According to the present invention, it is possible to configure an inexpensive air-core coil winding device that can easily set the opening angle α of the terminals 16, 17 to a desired angle only by adjusting the stopper. Further, since manual winding can be easily performed without using a motor, an air cylinder, or the like, it is suitable as a winding device for experimentally producing and evaluating various air-core coils. Further, the opening / closing operation of the wire holding portion 2a and the clamper 42b and the forward / backward operation of the mandrel 60 and the rotary spindle 41 can be performed by one operation by the driving device such as the air cylinder 5, so that productivity is improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a winding device of the present invention. FIG. 2 is a front view of a main part of the winding device showing a partial cross section. FIG. FIG. 4 is a partial cross-sectional front view of a main part of a winding device in a second winding process. FIG. 5 is a plan view of a winding device in a third winding process. FIG. FIG. 7 is a plan view of a winding device in a fifth winding step. FIG. 8 is a plan view of an air-core coil.
20 Passive spindle
30 Rotation drive
40 rotation axis
41 rotating spindle
42 Flyer
43 gears
50 rack gear
60 mandrel

Claims (4)

A passive spindle and a rotary drive having a rotary spindle opposed to the passive spindle on the same axis and movable in the axial direction are provided, and an air-core coil is formed by winding a wire fed from a bobbin. In the air core coil winding device,
A rotary shaft rotatable about the shaft, having a rotary spindle, a flyer, and a gear and having a through-hole formed in the shaft core, a tension mechanism incorporated in the flyer, and movably mounted in the through-hole of the rotary shaft. A mandrel, and a rack gear that rotates the rotation shaft via the gear when moving in a predetermined section linearly and freely, are provided in the rotation drive unit,
An air-core coil winding device, characterized in that one end of a wire drawn out from a winding frame and passed between a passive spindle and a rotary spindle can be held by a flyer. 2. The winding of an air-core coil according to claim 1, further comprising first and second stoppers for restricting a movement range of the rack gear, wherein the movement range of the rack gear can be changed by adjusting the positions of the first and second stoppers. Line equipment. 2. An air-core coil winding device according to claim 1, wherein a mandrel is projected from a tip of the rotary spindle, a mandrel is stretched between the rotary spindle and the passive spindle, and a wire is wound around the mandrel to form an air-core coil. . A rotary drive reciprocates in the axial direction between a first position and a second position, wherein in the first position of the rotary drive the rotary spindle approaches the passive spindle and projects the mandrel from the tip of the rotary spindle. 4. The air-core coil winding device according to claim 3, wherein the rotary spindle is separated from the passive spindle in the second position of the rotary drive, and the tip of the mandrel is accommodated in the rotary spindle.

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