JP2005158928A - Winding device of toroidal core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the winding device of a toroidal core that inexpensively and simply prevents a wire from being elongated or slackened, speeds up rotation in winding, and can perform the winding having high alignment and high density without being affected by the sectional shape and size of the toroidal core. <P>SOLUTION: The winding device of the toroidal core comprises a winding ring 2 that is interlinked with the toroidal core 5 for rotation; a wire storage 1 that is adjacent to the wiring ring 2, is rotated coaxially with the rotary axis of the winding ring 2, and stores the wire for winding; a torque generator 7 for baking the wire storage ring; a guide roller 9 that is provided on the wiring ring 2, and guides the wire of the wire storage ring 1; a winding roller 11 for guiding the wire to the toroidal core 5; and a slider 12 that can be reciprocated by the drive force of a coil spring 15 along the peripheral direction of the winding ring 2, and has an idle roller for guiding the wire from the guide roller 9 to the toroidal core 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a winding device for a toroidal core that is used to produce a toroidal coil by winding a coil wire around a toroidal core in a spiral shape.

  As a winding device for a toroidal core in which a wire for a coil is spirally wound around a conventional toroidal core, it rotates freely around the winding ring and coaxially with the rotation axis of the winding ring. A toroidal winding machine having a storage ring has been used.

  The winding ring and the storage ring can be arranged on the inner diameter side by opening and closing at one place of the ring.

  The storage ring has a groove having a U-shaped cross section at the outer periphery, and the winding ring has a wire guide and a guide roller for guiding the wire.

  Prior to winding, a wire of a predetermined length is wound into the groove of the storage ring and stored, and then the wire is guided to the toroidal core while being guided by the wire guide and guide roller on the winding ring. The wire is wound around the toroidal core by rotating the ring in the direction opposite to that during storage.

  During this winding, in order to give a predetermined tension to the wire rod, a braking force is applied to the rotation of the storage ring by a torque generator such as a powder brake or a torque motor. Therefore, at the time of winding, the length of the wire varies between the guide roller on the winding ring and the winding portion of the toroidal core. The winding ring is decelerated and wound with respect to the variation in the length of the wire.

  In this device, since the wire rod is tensioned by the braking force of the torque generator against the rotation of the storage ring, the variation in the length of the wire rod that occurs between the guide roller on the winding ring and the toroidal core On the other hand, the amount of control over the inertial force of the storage ring becomes too large, and there is a problem that the number of rotations of the winding cannot be increased.

  Moreover, when the winding part of the toroidal core is greatly decentered with respect to the rotation center of the winding ring, there is a problem that the amount of slackness of the wire is large and winding may not be possible.

  Furthermore, when the guide roller is inserted into the toroidal core, a large load is applied to the wire, and a large difference in winding force occurs between the inner diameter side and the outer diameter side of the toroidal core. There is a problem that there is also.

  As a measure to perform winding with a constant tension against these problems, a storage ring is provided inside the winding ring to form one ring as a whole, and the storage ring and winding are wound during winding. The ring is rotated independently, and the difference in rotation between the storage ring and the winding ring is the length of the wire wound around the toroidal core, and the wire tension from the tension sensor provided on the winding ring during winding and the storage The tension of the wire is kept constant by providing a control mechanism that feeds back the torque of the wire ring (see, for example, Patent Document 1).

JP 2000-243642 A (page 3-4, FIG. 1, FIG. 4 to FIG. 19)

  However, in the case of the device of Patent Document 1 described above, since the storage ring and the winding ring are rotated independently during winding, two synchronized motors are required, and the control is unstable and takes a signal from the rotating body. Since the device cost becomes high due to the complexity, the amount of control with respect to the inertia force of the storage ring becomes too large when the eccentricity with the toroidal core is large.

  In addition, there is a method in which a guide roller such as a cantilever type is provided on the wire that winds the wire of the winding ring, but in this case, the stroke is short and the effect on measures against elongation and slackening of the wire is limited. There was a problem of being.

  The present invention solves the above-mentioned problems, can prevent the wire from being stretched or slackened by an inexpensive and simple method, and is great for the wire even when the number of rotations is increased. An object is to provide a toroidal core winding device that can rotate at a high speed without applying tension and is not affected by the cross-sectional shape and size of the toroidal core, and can perform high-alignment and high-density winding. And

A winding device for a toroidal core according to the present invention includes a winding ring that rotates in linkage with the toroidal core, an adjacent to the winding ring in linkage with the toroidal core, and a rotating shaft of the winding ring. In a winding device of a toroidal core that has a storage ring that rotates coaxially and stores a wire wound around the toroidal core, and a torque generator that applies a brake to the rotation of the storage ring.
On the winding ring, a guide roller that guides the wire drawn from the storage ring, a winding roller that guides the wire from the guide roller and guides it to the toroidal core, and a winding portion of the toroidal core; A slider for applying tension to the wire between the winding roller and a drive mechanism for adjusting the tension by reciprocating the slider along the circumference of the winding ring for a predetermined section It is.

  According to the toroidal core winding apparatus of the present invention, it is possible to prevent the wire from being stretched or slackened by an inexpensive and simple method, and to wind at a high speed while the tension is stabilized. .

Embodiments of the present invention will be specifically described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a toroidal coil in which a coil (wire) 4 is spirally wound around a toroidal core 5, and shows a cross-section with a part cut away.

  2 is a perspective view showing the toroidal core winding device according to the first embodiment of the present invention, FIG. 3 is an enlarged perspective view of the winding portion in FIG. 2, and FIG. 4 is the winding portion in FIG. It is a perspective view which decomposes | disassembles and shows each member of.

  As shown in FIGS. 2 and 3, the toroidal core winding device in the present embodiment is adjacent to the rotatable winding ring 2 and the winding ring 2 and coaxial with the rotation axis of the winding ring 2. It is the structure which has the storage ring 1 which rotates.

  The winding ring 2 and the storage ring 1 are opened and closed at one position of the ring, and the storage ring 1 and the toroidal core 5 intersect (link) in a chain shape during winding.

  The storage ring 1 has a circumferential groove 1A having a U-shaped cross section on the outer peripheral portion, and a wire having a required length wound around the toroidal core 5 is wound around the circumferential groove 1A. Moreover, it has a torque generator 7 such as a powder brake or a motor that applies a braking force to the storage ring 1 during winding.

  The winding ring 2 includes a guide roller 9 that guides a wire rod wound around the storage ring 1 to the toroidal core 5, and a dancer roller unit or idle roller 10 including an idle roller 10 and a slider 12. It has a dancer roller section and a winding roller 11.

  Moreover, the motor 8 which rotates the winding ring 2 is provided, and the driving force of the motor 8 is transmitted to the gear provided in the winding ring 2 inner peripheral side.

  As shown in the perspective view of FIG. 4, the guide roller 9 and the winding roller 11 are attached to the winding ring 2 so as to be rotatable. The idle roller 10 is attached to the slider 12 so as to be rotatable. The slider 12 has a U-shaped spring receiving portion so as not to touch the mandrel 13.

  A plurality of coil springs 15 are prepared, and the number corresponding to the required spring force is inserted into the mandrel 13 together with the washer 16. The mandrel 13 has substantially the same diameter as the winding ring 2. The slider 12 is fitted into the mandrel 13 so as to receive a pressing force by the coil spring 15 through the washer 16. When the spring force is insufficient, the spring total length is changed by the stopper 19 that can be fixed to the mandrel 13, or the spring force is changed by changing the number of springs that generate the spring force.

  As shown in FIG. 3, the mandrel 13 on which the coil spring 15 and the washer 16 are set is fixed by holders 14A and 14B along the circumference of the side surface of the winding ring 2. The slider 12 reciprocates along the mandrel 13 with the spring force of the coil spring 15 supported by the slider 12 on one side against the tension and slack of the wire as a drive mechanism. The idle roller 10 reciprocates along the circumference of the winding ring 2 as the slider 12 reciprocates.

Next, the operation of the toroidal core winding device in the present embodiment will be described.
First, in FIG. 2, the storage ring 1 is connected to the winding ring 2 by a connecting portion (not shown), and the storage ring 1 connected to the winding ring 2 is rotated by driving the motor 8. A wire rod having no winding frame is wound into the groove 1A of the storage ring 1 for a predetermined length and stored, and after the winding is completed, the connecting portion is disconnected.

  FIG. 5 is a plan view (a) and a front view (b) showing a state where the wire rod stored in the storage ring 1 is wound around each roller of the winding ring 2.

  As shown in FIG. 5, the wire 4 is guided from the storage ring 1 to the toroidal core 5 through the guide roller 9, the idle roller 10 and the winding roller 11 in this order on the winding ring 2. The wire 4 is wound around the toroidal core 5 by rotating the motor 8 in a direction opposite to that during storage and driving the winding ring 2 to rotate. At this time, the position of the idle roller 10 is such that no excessive tension is generated in the wire 4 due to the braking force applied by the torque generator 7 and the spring force of the coil spring 15 for driving the slider 12. 4 is reciprocated along the circumference of the winding ring 2 so that no slack occurs in the winding 4.

  FIG. 6 shows a state of the reciprocating movement, and the dancer roller portion and the wire 4 composed of the guide roller 9, the idle roller 10 and the winding roller 11 while the winding ring 2 goes around the winding portion of the toroidal core 5 during winding. It is the figure which showed the operation state.

  When the rotating shaft of the winding ring 2 and the winding portion of the toroidal core 5 are eccentric by a distance E, the distance between the supply position of the wire 4 and the winding portion of the toroidal core 5 is always changed by the rotation of the winding ring 2. However, on the tension side, the idle roller 10 on the slider 12 moves in a direction to compress the coil spring 15 by the pulling force of the wire 4, and on the slack side, the idle roller 10 on the slider 12 is moved by the pressing spring force of the coil spring 15. Since the wire 4 moves so as to absorb the slack of the wire 4, the wire 4 can be wound at a high speed with a stable tension of the wire 4 without abrupt tension or slack of the wire 4.

  The coil spring 15 for driving the slider 12 needs to be adjusted to a spring force corresponding to the magnitude of the tension when the wire rod 4 is wound, and as shown in FIG. 4, the winding ring 2 to the holders 14A and 14B. After separating from the fastening portion and unscrewing the screw 22 of the holder 14B at one end and removing it from the mandrel 13, an operation of replacing the coil spring 15 occurs. For this reason, a plurality of combinations of the mandrel 13, the holders 14A and 14B, the washer 16 and the coil spring 15 are prepared in advance, so that the replacement work corresponding to the large tension range of the wire 4 can be performed in a short time. Can do.

  The spring force of the coil spring 15 is adjusted so that when the spring force for driving the slider 12 and the brake force of the storage ring are applied, the idle roller 10 comes near the middle of the range in which the slider 12 can move at the start of winding. By this adjustment, the moving amount of the slider 12 can be used effectively, and the adjustment amount of the drawing amount of the wire 4 and the tension can be ensured.

  Further, as shown in FIG. 5, the guide roller 9, the winding roller 11, and the idle roller 10 are arranged in this order in the circumferential direction of the winding ring 2, or the winding roller 11, the guide roller 9, and the idle roller 10 are arranged in this order. The moving amount of the idle roller 10 can be ensured for a long time with respect to the toroidal core 5 having various shapes or complicated shapes, or with respect to the toroidal core 5 having a wide size range.

  Setting the amount of adjustment to a large range by the dancer roller portion that pulls the wire 4 from the storage ring 1 corresponds to various sizes and shapes of the toroidal core 5 in order to absorb the tension and slack of the wire 4. This is advantageous. In the case of FIG. 5, the wire 4 passes through a U-shaped path with the idle roller 10 as a middle fulcrum. Therefore, the distance between the guide roller 9 and the idle roller 10 is Y, the distance between the winding roller 11 and the idle roller 10 is X, the movement amount of the idle roller 10 is α, and the Y and X variables associated with the movement amount α are y and x. In this case, Y = y + α, X = x + α, Y + X = y + x + 2α, and the drawing adjustment amount of the wire 4 is 2α. That is, the drawing adjustment amount of the wire 4 can be secured up to about twice the amount of movement of the idle roller 10 in the circumferential direction. In addition, the ratio of the length of the mandrel 13 to the drawn amount of the wire 4 can be reduced, and the shape of the dancer roller portion can be reduced.

  The dancer roller portion can have only a very small inertia of the dancer roller portion except for the influence on the tension of the wire rod 4 due to the rotational inertia force of the storage ring 1 caused by the length variation of the wire rod 4. Sudden tension fluctuation is suppressed.

  Further, since the slider 12 on which the idle roller 10 is mounted moves along the concave groove in the circumferential direction of the winding ring 2, it is possible to ensure the movement accuracy and reproducibility during the entire stroke.

  Further, the tension of the wire 4 is directly adjusted by the position movement of the idle roller 10, and the winding roller 11 does not move, so that the wire 4 can be wound in an aligned state with high accuracy.

  Further, the guide roller 9, the winding roller 11, the idle roller 10 and the like use a low friction coefficient material such as a polyamide resin, a polyacetal resin, a fluororesin, or the like, thereby reducing the friction coefficient of the roller surface. The weight is reduced, the inertia is reduced, and the elongation of the wire 4 is reduced. In addition, by using a flexible material such as urethane rubber, the impact force on the wire 4 is relieved, so that an extremely thin wire can be wound.

Embodiment 2. FIG.
FIG. 7 is a perspective view showing a winding portion in the toroidal core winding device according to the second embodiment of the present invention, and FIG. 8 is an exploded perspective view showing the roller portion. In FIG. 7, the motor for rotating the winding ring and the torque generator for braking the storage ring can have the same configuration as in FIG.

  As shown in FIG. 7, in the present embodiment, the roller of the dancer roller portion is constituted by a guide roller 17 and a winding roller 18 for guiding the wire wound around the storage ring to the toroidal core.

  In addition, a coil spring 15 is inserted into a mandrel 13 provided along the circumference of the side surface of the winding ring 2, and the guide roller 17 and the winding roller 18 are rotatably attached to the slider 12, and the slider 12 is moved by the coil spring 15. Under the pressing force, the slider 12 reciprocates along the mandrel 13 by the coil spring 15 (drive mechanism) against the tension and slackness of the wire.

  As shown in the perspective view of FIG. 8, the slider 12 to which the guide roller 17 and the winding roller 18 are attached has a U-shaped spring receiving portion so as not to touch the mandrel 13.

  A plurality of springs 15 are prepared, and the number corresponding to the required spring force is inserted into the mandrel 13 together with the washer 16. The slider 12 fits the U groove into the mandrel 13 so as to receive a spring force via the washer 16. The mandrel 13 on which the spring 15 and the washer 16 are set is fixed to the side surface of the winding ring 2 by holders 14A and 14B.

  In this embodiment, the guide roller 17 and the winding roller 18 move in the direction in which the coil spring 15 is compressed by the pulling force of the wire 4 on the tension side, and the guide roller 17 and the winding roller 18 absorb the slack of the wire on the slack side. Thus, the wire spring 4 is moved by the pressing spring force of the coil spring 15, so that the wire 4 can be wound with a stable tension without abrupt tension or slack.

  The dancer roller portion can have only a very small inertia of the dancer roller portion except for the influence on the tension of the wire rod 4 due to the rotational inertia force of the storage ring 1 caused by the length variation of the wire rod 4. Sudden tension fluctuation is suppressed.

  Further, since the slider 12 mounted with the guide roller 17 and the winding roller 18 moves along the concave groove in the circumferential direction of the winding ring 2, it is possible to ensure the movement accuracy and reproducibility during the entire stroke. .

  Moreover, the tension | tensile_strength of the wire 4 is adjusted with the position movement of the guide roller 17 and the winding roller 18, and it can wind to the state which aligned with high precision.

  Further, the guide roller 17, the winding roller 18 and the like can reduce the friction coefficient on the roller surface by using a material having a low friction coefficient such as a resin material such as polyamide resin, polyacetal resin, fluorine resin, etc. The inertia is reduced and the elongation of the wire 4 is reduced. In addition, by using a flexible material such as urethane rubber, the impact force on the wire 4 is relieved, so that a very thin wire can be wound.

  Moreover, the elongation and damage of the wire 4 can be reduced by using the guide roller 17 as a sliding guide. In this case, in FIG. 7, the spring 15 is provided between the slider 12 and the holder 14B.

  The toroidal core winding device of the present invention is used as an automatic winding device for winding a coil around an iron core (toroidal core) of a once-through current transformer.

It is a perspective view which cuts and shows a toroidal coil partially. It is a perspective view which shows the winding apparatus of the toroidal core of Embodiment 1 in this invention. It is an expansion perspective view of the coil | winding part in FIG. It is a perspective view which decomposes | disassembles and shows each member of the coil | winding part in FIG. It is the top view (a) and front view (b) which show the state which wound the wire wound around the storage ring around each roller of the winding ring. It is the figure which showed the operation state of the dancer roller part and wire which consist of a guide roller, an idle roller, and a winding roller, while a winding ring goes round the winding part of a toroidal core at the time of winding. It is a perspective view which shows the coil | winding part in the winding apparatus of the toroidal core of Embodiment 2 in this invention. It is a perspective view which decomposes | disassembles and shows the roller part in FIG.

Explanation of symbols

1 storage ring, 1A circumferential groove, 2 winding ring, 4 wire rod, 5 toroidal core,
7 Torque generator, 8 motor, 9 guide roller, 10 idle roller,
11 winding roller, 12 slider, 13 mandrel, 14A, 14B holder,
15 coil spring, 16 washer, 17 guide roller, 18 winding roller,
19 stopper, 22 screws.

Claims (6)

A winding ring that rotates in linkage with the toroidal core, and is adjacent to the winding ring in linkage with the toroidal core, rotates coaxially with the rotation axis of the winding ring, and is wound around the toroidal core. In a winding device of a toroidal core having a storage ring for storing a wire, and a torque generator for applying a brake to the rotation of the storage ring,
On the winding ring, a guide roller that guides the wire drawn from the storage ring, a winding roller that guides the wire from the guide roller and guides it to the toroidal core, and a winding portion of the toroidal core; A slider for applying tension to the wire between the winding roller and a drive mechanism for adjusting the tension by reciprocating the slider along a circumference of the winding ring in a predetermined section; A toroidal core winding device. The drive mechanism is a coil spring that is passed through an arc-shaped bar having substantially the same size as the diameter of the winding ring provided on the winding ring, the slider is disposed at the end of the coil spring, and the slider is 2. The toroidal core winding device according to claim 1, wherein said predetermined section is reciprocated along a bar. 3. The winding device for a toroidal core according to claim 2, wherein the coil spring comprises a plurality of coil springs. 2. The toroidal core winding device according to claim 1, wherein an idle roller for guiding the wire from the guide roller to the winding roller is provided, and the idle roller is provided on the slider. 2. The toroidal core winding device according to claim 1, wherein both the guide roller and the winding roller are provided on the slider. 6. The toroidal core winding device according to claim 5, wherein the guide roller is of a sliding guide type.

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