JP2842296B2 - Cylindrical rotary transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical rotary transformer for use in a cylinder of a video tape recorder (VTR), for example, having a coil mounted in a winding groove provided on an inner periphery of a cylindrical core. It is.

[0002]

2. Description of the Related Art In recent years, a video tape recorder (VTR) has been developed.
The miniaturization and multifunctionalization of are being promoted. To cope with this, it has been studied to use a cylindrical rotary transformer for the VTR instead of the conventional flat transformer.

[0003] The coil of this core must be completely housed in a winding groove formed in the inner peripheral surface of the core so as not to go inside from the inner peripheral surface of the core. Such work is
There has been a problem that it can only be performed manually and over a long period of time, and cannot be produced efficiently.

Therefore, as a method of automatically mounting a coil in a winding groove provided on the inner periphery of a cylindrical core, a technique described in Japanese Patent Application Laid-Open No. Sho 62-54411 has been proposed. .

According to this technique, one or several portions of a coil are deformed to the inner diameter side by a coil deformation working shaft having a plurality of holding fingers so that the circumscribed circle diameter of the coil is reduced.
The deformed coil is inserted into a core having a winding groove on the inner periphery, and the deformed portion of the inserted coil is enlarged by a coil expanding work shaft having an expanding finger, and the coil is inserted into the winding groove of the core. The deformed portion is engaged, and thereafter, the entire periphery of the coil is sequentially pressed against the bottom surface of the winding groove by a pressing roller to manufacture a component having a coil on the inner periphery.

[0006]

However, in this technique, the coil is formed in accordance with the diameter of the annular groove larger than the diameter of the inner peripheral surface of the core, and the coil is formed in the core by utilizing the elasticity of the coil. Since it is inserted into the peripheral surface and fitted into a predetermined winding groove, there are the following problems.

First, a jig for forming a coil to a predetermined diameter, a jig for holding a coil wound around the jig from outside, and a jig for deforming the held coil inward and inserting the coil into a core. It requires a jig, a jig for enlarging the inserted coil, and a jig for sequentially pressing the inserted coil into the groove, which requires not only many jigs but also a large number of steps.

When the coil is expanded in the core and then sequentially pressed against the winding groove by a roller or the like, the coil may be deformed. In particular, since the coil is deformed in order to reduce the circumscribed circle diameter of the coil before insertion into the core, the deformed portion may not be completely restored and may be bent.

Furthermore, since the coil is formed in conformity with the winding groove of the core, when the coil is inserted into the core, it is necessary to divide the coil into a deformed portion and a non-deformed portion, and to largely deform the deformed portion. In addition, the jig for that becomes complicated.

An object of the present invention is to provide a cylindrical rotary transformer which can be assembled in a short time in a small number of steps.

[0011]

According to the present invention, in order to achieve the above object, there is provided a coil comprising a linearly elongated portion formed between a plurality of arc-shaped portions.

A coil comprising four sets of arc-shaped portions and a portion formed between the arc-shaped portions and extending linearly is mounted in the winding groove.

[0013]

The coil holding means which can be opened and closed in the radial direction is closed to the outer diameter which does not come into contact with the inner diameter of the cylindrical core even when the wire is wound around the outer circumference. Next, a wire is wound around the outer periphery of the coil holding means and inserted into the cylindrical core. Then, by opening the coil holding means in the radial direction, the coil formed on the outer circumference of the coil holding means is pressed against the winding groove on the inner circumference of the cylindrical core, and the coil is mounted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows a cylindrical rotary transformer connected to a VTR.
1 shows a tape running system of a VTR incorporated in a cylinder 1. The VTR cylinder 1 is configured as shown in FIG. 3, and the rotary transformer 7 includes a VTR cylinder 1 shown in FIGS.
As shown in the figure, a cylindrical core 10 having a coil wound on the inner periphery is provided.

First, in FIG. 2, 1 is a VTR cylinder, 2 is a tape, and 3 is a cassette case. Here, the rotary transformer 7 in the VTR cylinder 1 is shown in FIG.
The tape 2 taken out by the upper cylinder 4 as shown in FIG.
Is transmitted to the lower cylinder 5 of the VTR cylinder 1 which does not rotate. In FIG. 3, reference numeral 6 denotes a head.

As shown in FIGS. 4 and 5, a coil 13 is mounted on a cylindrical core (rotor) 10 of the rotary transformer 7, which is mounted on the rotating upper cylinder 4 side. A groove 11 for accommodating a terminal wire of the coil is provided in a direction perpendicular to the groove 11 for winding.

In FIG. 4, another cylindrical core (stator) 9 is mounted on the lower cylinder 5 side, and a coil is mounted on the outer periphery of the core. Reference numeral 8 denotes a pin around which the terminal wire of the coil 13 is wound.

Next, a method for mounting the windings on the inner periphery of the cylindrical core 10 will be described.

The apparatus shown in FIG. 1 includes a cylindrical core 10 and a coil holding jig 20 for mounting a coil 13 on the cylindrical core 10.

As shown in FIGS. 5 and 1, the cylindrical core 10 is provided with a winding groove 11 for mounting a coil 13 in a circumferential direction, and is orthogonal to the winding groove 11. The leading groove 12 through which the terminal wire of the coil 13 passes is provided in the direction in which the coil 13 extends.

The coil holding jig 20 includes a pusher 21 for the coil 13, an opening / closing mechanism 22 for the pusher 21, and a terminal wire presser 2.
3, a coil guide 25, and a terminal wire holder 26.

The pusher 21 is divided into a plurality (for example, four) of pusher pieces 21 ′ in the circumferential direction, and the coil 13 is directly pushed into the winding groove 11 of the cylindrical core 10. I have.

The opening / closing mechanism 22 opens and closes a plurality of pusher pieces 21 'of the pusher 21 simultaneously in a radial direction, that is, in a direction in which the circumscribed circle diameter is enlarged. The terminal wire presser 23 is provided on the outer peripheral portion of the pusher 21 and prevents the wire 24 (see FIGS. 6C and 6D) from lifting when the terminal wire of the wound coil 13 is pulled out. It is supposed to.

The coil guide 25 is provided on the outer periphery of the pusher 21 and guides the wire 24 when winding.

The terminal wire holder 26 is also provided on the outer periphery of the pusher 21 so as to position the end of the terminal wire of the coil 13 wound.

At the winding position, a winding flyer 14 is provided around the coil holding jig 20 as shown in FIG. 6B, and further as shown in FIG. 6C. In addition, forming hands 15 and 15 'for the wire 24 are provided, and as shown in FIG. 6D, a coil holding pin 16 is provided.

At the position where the wound coil 13 is mounted on the cylindrical core 10, the coil holding jig 20 having the wound coil 13 and the cylindrical core 10 are relatively moved in the axial direction. Moving means (not shown)
Has been deployed.

Further, each pusher piece 21 'of the pusher 21 of the coil holding jig 20 is provided with the pusher pieces 21' in FIGS.
As shown in FIG. 5, a claw portion 17 is provided, and a claw guide groove 18 is formed in the opening / closing mechanism 22. Each claw portion 17 is operated by a fluid pressure circuit (not shown) provided in the opening / closing mechanism 22 and moves in the radial direction of the pusher 21 along the claw guide groove 18 to push the pusher piece 21 ′. The opening and closing operation is performed in the radial direction of 21.

Next, steps from winding of the coil to mounting of the coil on the cylindrical core 10 using the apparatus of the above embodiment will be described mainly with reference to FIGS. 6 (A) to 6 (F).

First, FIG. 6A shows the coil holding jig 20 before winding.

The coil holding jig 20 is located outside the cylindrical core 10 on which the coil 13 is mounted on the inner periphery.
In the initial state, the pusher 21 is closed by the opening / closing mechanism 22, and the outer diameter of the pusher 21 is such that the wire 24 is wound around the outer circumference and does not contact the inner diameter of the cylindrical core 10. That is, for example, the inner diameter of the cylindrical core 10 is set to 1
4 mm, the wire diameter of the wire 24 to be wound is 0.2 mm, and the clearance between the inner diameter of the cylindrical core 10 and the outer diameter of the wound coil 13 is 0.6 mm, the outer diameter of the pusher 21 is 13 mm. And

FIG. 6B shows a process of completing the winding of the second layer and performing the winding of the third layer.

The flyer 14 waiting at the outer peripheral position of the pusher 21 closed by the opening / closing mechanism 22 turns around the outer periphery of the pusher 21 to form the coil 13 having a predetermined number of turns. At this time, displacement of the wire 24 is prevented by the coil guide 25.

FIG. 6C shows a step of shaping the terminal wire of the coil 13.

The winding is completed in the previous step, and the coil 13
After the forming hands 15, 15 'grip the wire 24 on both sides of the pusher 21 in which is formed, the outside thereof is cut by a cutter (not shown). Forming hand 15, 1 while holding wire 24
5 'is a terminal wire presser 23 on the outer periphery of the pusher 21.
Then, it operates so that the wire 24 is hung on the terminal wire holder 26. At this time, the wire rod hanging operation is performed in a state where the coil pressing pin 16 presses the terminal wire drawing portion of the coil 13 so that the coil 13 does not rise from the pusher 21.

FIG. 6D shows a state where the shaping of the terminal line is completed.

After the wire hanging operation, the forming hands 15, 15 'release the wire 24. Then, the coil holding jig 20 having completed the winding of the third layer and the terminal wire processing is rotated by 90 ° about the axis thereof, and the winding of the fourth layer is completed by the above-described series of operations.

FIG. 6E shows a state in which all windings have been completed.

The coil holding jig 20 in which the predetermined number of layers of the coils 13 are formed on the outer periphery by the above-described process is positioned so as to coincide with the axis of the cylindrical core 10. Next, it is inserted into the cylindrical core 10 in which an adhesive has been applied to the winding groove 11 on the inner periphery in advance. Subsequently, the coil holding jig 20 is positioned at a position where the winding groove 11 formed on the inner periphery of the cylindrical core 10 and the coil 13 wound on the coil holding jig 20 match.
Stop insertion. Further, the coil holding jig 20 and the cylindrical core 10 are relatively rotated about the axis so that the leading groove 12 in the cylindrical core 10 and the terminal wire leading position of the coil 13 match. This rotation adjustment may be performed before insertion.

FIG. 6F shows a state where the mounting of the coil 13 on the cylindrical core 10 is completed.

The cylindrical core 10 and the coil holding jig 20
When the adjustment of the insertion depth and the rotation has been completed, the pusher 21 is opened by the opening / closing mechanism 22 of the pusher 21 of the coil holding jig 20, the coil 13 formed on the pusher 21 is extended, and the cylindrical core 10 is extended. To the winding groove 11.

Next, the coil mounting process is shown in FIG.
This will be described in detail with reference to FIG.

FIG. 7A shows the winding groove 1 of the cylindrical core 10.
1 shows a state where the position of the coil 13 formed on the outer periphery of the coil holding jig 20 matches.

From this state, the opening / closing mechanism 2 of the pusher 21
2 by operating the hydraulic circuit (not shown).
Is opened in the radial direction of the pusher 21 along the guide groove 18 for the nail. As a result, the pusher pieces 21 'are simultaneously opened, and the pusher 2
The coil 13 wound on the outer periphery of the coil 1 is spread, and the coil 13 is further pressed into the winding groove 11 of the cylindrical core 10.

Next, FIG. 7B shows a pressed state.

At this time, the coil guide 25 is
Since it is formed thinner than the wire diameter, the pressing force applied to the coil 13 is not reduced.

The pressed coil 13 is connected to the cylindrical core 10.
Is fixed to the inner periphery of the core by the adhesive applied to the winding groove 11.

At the same time as these pressing steps, the terminal wire positioned on the terminal wire holder 26 of the coil holding jig 20 is
It is attached to a terminal pin (pin 8 in FIG. 4) of the main body of the cylindrical core 10 by a terminal wire processing means (not shown).

The coil 13 is the winding groove 1 of the cylindrical core 10.
After being fixed to 1, the pusher 21 is closed by the opening / closing mechanism 22 of the pusher 21. At this time, the outer diameter of the pusher 21 returns to the same state as before the winding, and becomes smaller than the inner diameter of the cylindrical core 10. At this stage, the coil holding jig 20 is extracted from the cylindrical core 10.

Through these series of steps, the coil 13 can be mounted in the winding groove 11 on the inner periphery of the cylindrical core 10.

In this embodiment, the wire diameter used for the coil 13 is expanded so that the coil diameter is increased so that the wire is bonded.

FIG. 8 shows an elongation-load diagram of a copper wire used as a wire.

The copper wire alone does not cause a breakage problem even if it is elongated by about 20%, but considering the peeling of the coating which causes a short circuit of the circuit and the destruction, etc., the elongation from the winding diameter to the enlarged diameter is reduced. About 3 to 5% is desirable. If further expansion is required, the occurrence of defects is prevented by forcibly feeding the wire from the terminal wire side and suppressing it to a predetermined elongation.

By providing the wire with elongation to such an extent that the coating does not peel off in the range of the plastic region, the core 1
The coil 13 can be bonded to the winding groove 11 on the inner periphery of the zero. Further, even after the jig 20 is removed from the core 10 after the bonding, the coil 13 does not return to the original state.

In the above embodiment, the adhesive is applied to the winding groove 11 of the cylindrical core 10. However, the adhesive may be applied to the coil 13 in order to further improve the workability. Good.

FIG. 9 is a perspective view showing an embodiment of a pusher suitable for applying an adhesive to the coil.

In the embodiment shown in FIG. 9, the pusher 21
The adhesive 19 is applied to a plurality of portions of the coil 13 wound around the coil 13 at intervals in the circumferential direction.

In the embodiment in which the adhesive 19 is applied to the coil 13, the adhesive 1 is applied to the entire circumference of the winding groove 11 of the cylindrical core 10 via the adhesive 19 applied to the coil 13.
When it is necessary to fill the adhesive 9, it is necessary to increase the application amount of the adhesive 19. As a result, there is a possibility that the adhesive 19 protrudes to the pusher 21 side and adheres. As a countermeasure, by providing a relief groove 27 for the adhesive in the pusher 21 as shown in FIG. 9, it is possible to prevent the adhesive 19 from adhering to the pusher 21 side.

In the above embodiment, the method of turning the flyer 14 around the outer periphery of the pusher 21 as shown in FIG. 6 when winding the coil 13 on the coil holding jig 20 has been described. In addition, the method of holding the wire and drawing out the terminal wire using the forming hands 15, 15 'and the coil holding pin 16 has been described.

Next, a method of winding a coil holding jig and a method of drawing a terminal wire will be described with reference to another embodiment.

FIGS. 10A to 10F show steps from winding of the coil to mounting of the coil on the cylindrical core 10. FIG. First, FIG. 10A shows a coil holding jig 20 'before winding. In the initial state of the coil holding jig 20 ′, the pusher 21 is closed by the opening / closing mechanism 22. The jig 20 'also includes a wire hook 28 for holding one end of the wire 24 in the winding, and an end for temporarily holding a terminal wire of the formed and styled winding. A hook 29 is provided. Also,
A coil guide 25 is provided on the outer periphery of the pusher 21, the groove having a width capable of mounting a winding.

FIG. 10B shows a step of hooking one end of the wire 24 on the wire hook 28 and winding the wire around the coil guide 25.

FIG. 10C shows a state after the terminal wire of the coil 13 is styled. That is, the coil guide 2
5 is wound, and the end wire is hooked on the end hook 29 from a state where the end wire is cut to a predetermined length, and is shaped so that the end wire enters the lead groove 12 of the cylindrical core 10.

FIG. 10D shows a state where the coil holding jig 20 ′ is inserted into the core 10 and positioned.

FIG. 10E shows a state in which the pusher 21 is radially expanded from the positioned state and the winding on the outer periphery of the pusher 21 is pressed against the winding groove 11 of the cylindrical core 10. Show.

FIG. 10F shows a state where the winding is completed in the winding groove 11 of the cylindrical core 10, and the coil holding jig 20 'is pulled out and taken out.

Next, an apparatus for performing these steps will be described with reference to FIGS.

First, FIG. 11 is a perspective view showing an example of the apparatus applied to this embodiment, and FIG. 12 is a front view of the apparatus shown in FIG.

FIG. 13 is a block diagram showing a control device for operating the devices shown in FIGS. 11 and 12.
Next, FIG. 14 is a flowchart showing an operation sequence in an embodiment of the apparatus according to the present invention, and FIGS.
0 and FIG. 31 are process explanatory diagrams based on the flowchart of FIG. 14, and FIGS. 16 to 26 are explanatory diagrams for describing details of each process.

As shown in FIGS. 11 and 12, the inner peripheral winding mounting device in the embodiment shown in these figures performs a winding, a coil holding jig 21 'for holding the winding, and a coil holding jig 21' for holding the coil. Extension mechanism 3 for opening and closing jig 20 '
0, a motor unit 40 for performing rotational positioning of the coil holding jig 20 'and the expansion mechanism unit 30, and a forming guide unit for processing a terminal wire of a winding wound on the coil holding jig 20'. 50, a solvent application section 60 for applying a solvent to the forming portion of the winding to fix the forming shape, a core holding section 70 for holding and fixing the cylindrical core 10, and a left-right direction of the core holding section 70. And a control device (FIG. 13) for controlling each operation.

The coil holding jig 20 ′ temporarily holds the pusher 21 for winding the wire 24 and attaching it to the cylindrical core 10, and the terminal wire of the winding after forming and styling. And a wire hook 28 for holding one end of the wire 24 in the winding.

Here, the pusher 21 is divided into a plurality (for example, four) of pusher pieces 21 ′ as shown in FIG. 16, and the wound coil is inserted into the winding groove 11 of the cylindrical core 10. As shown in FIG. 19, the portion where the winding is applied (coil guide 25) forms a groove 251 having a width capable of mounting the winding on the outer periphery of the pusher 21. A winding guide 252 having a height of about の of the wire diameter is provided on the side.

The end hook 29 is provided on the end face of the pusher 21, and connects the end of the wire 24 after the winding around the outer periphery of the coil holding jig 20 ′ to the cylindrical core 1.
The stylus is styled so that it can be mounted in the drawer groove 12 of the No. 0, and is temporarily held.

Since the wire hook 28 is located near the root of the pusher 21 and is attached to the pusher 21, the wire hook 28 is synchronized with the rotation of the pusher 21. Furthermore,
It is from the center of the pusher 21 to the outer periphery, and its diameter is
This is a position where there is no interference even when the core holding part 70 is slid and moved to be positioned at the coil holding jig 20 ′,
The wire hook 28 is provided with a hook 281 (FIG. 16) for hooking the starting end of the wire 24.

The expansion mechanism 30 includes a claw 31 for attaching the pusher 21, an air chuck 32 for opening and closing the claw 31, and a stopper 3 for adjusting the amount of opening and closing.
9, an air feed pipe 33 for supplying driving air to the air chuck 32, a flange 34 for holding the air chuck 32, and a timing belt 35 for attaching to the flange 34 to receive the rotational force of the motor unit 40. , A bearing 37 for facilitating the rotation of the flange 34, and a bracket 38 for holding the expansion mechanism 30.

Here, the claw part 31 is
The wire 24 wound around the outer periphery of the pusher 21 by the opening and closing operation of the air chuck 32 is mounted in the winding groove 11 and the drawing groove 12 of the cylindrical core 10.

The air chuck 32 performs an opening / closing operation by supplying air at a predetermined pressure, and is of a rotary type capable of continuously supplying air even when the chuck rotates.

The stopper 39 comes into contact with the claw portion 31 and adjusts the diameter of the winding when the pusher 21 is closed and the diameter of the mounting when the pusher 21 is expanded. Are different in inner diameter and different in depth of the winding groove 11.

The air feed pipe 33 supplies driving air to the rotary type air chuck 32. The air feed pipe 33 is fixed to the air chuck 32 and can supply air without being affected by its rotation. .

The flange 34 is attached to the air chuck 32
The end face on the opposite side of the claw portion 31 is held, and a hole for passing the air feed pipe 33 is provided in the center thereof, and a shaft for mounting the timing pulley 36 and the bearing 37 is formed on the outer periphery thereof. .

The motor section 40 rotates the timing pulley 42 by the rotation of the motor 41 and rotates the flange 34 of the expansion mechanism section 30 via the timing belt 35 by the movement thereof. The bracket 43 is formed.

The forming guide 50 is pressed down from above the wire 24 wound around the outer periphery of the pusher 21,
A forming guide 51 for preventing the wire 24 from being lifted when taking a style; a guide plate 52 for holding the forming guide 51; and a stopper 53 attached to the guide plate 52 for restricting the descending of the forming guide 51. An adjuster 54 for contacting the stopper 53 to adjust the descending amount, and a forming guide 5
1, an air cylinder 55 for vertically moving, a linear guide 56 for guiding up and down movement, a block 57 for holding the forming guide section 50,
And a bracket 58 for supporting the

Here, the forming guide 51 is
As shown in FIG. 17, by setting the thickness to be approximately the same as the diameter of the wire 24, a suitable curvature can be provided at the curved point when the end wire of the wire 24 is styled, and the cylindrical core 10 The size can be set so that it can be accommodated within the width of the extraction groove 12. The portion of the forming guide 51 that contacts the wire 24 is provided with a pusher 21 as shown in FIG.
The wire 24 is wound in a groove 251 formed on the outer periphery of the wire, and a slit is cut so that the winding guides 252 on both sides thereof can be sufficiently inserted, and the depth is approximately the same as the diameter of the wire 24. It has become. With this slit, the wire 24
In the case of performing the styling, since the wire can be sufficiently pressed, it is possible to prevent the wire 24 from floating.

The solvent application section 60 is for adhering the space between the wires having a self-fusing property.
And a stored solvent in the nozzle 6.
1; a concave plate 63 for fixing the syringe 62; a fixing plate 64 for fixing the syringe 62 by the concave plate 63;
A stopper 65 for restricting the lowering of the syringe 62, an adjuster 66 for contacting the stopper 65 and adjusting the lowering amount, an air cylinder 67 for moving the syringe 62 up and down, A linear guide 68 as a guide for the operation, a block 69 for holding the solvent application section 60, and a bracket 691 for supporting the block 69 are provided.

The core holding section 70 includes a core holder 71 for inserting and holding the cylindrical core 10, a holder plate 72 for holding the core holder 71, and a core holder 71 mounted on the holder plate 72 for positioning the core holder 71 in the rotational direction. Guide 73, lower guide 75 for aligning the cylindrical core 10 with the pusher 21 in the vertical direction, and the L-shaped metal fitting 7 attached to the upper guide 74 side.
6 and a T-shaped bracket 77 attached to the lower side of the guide 75
A preload spring 78 for holding the L-shaped metal member 76 against the T-shaped metal member 77; and a preload bolt 79 in the preload spring 78 and attached to the T-shaped metal member 77.
And a bracket 721 for supporting the core holding portion 70.

The core positioning section 80 is provided on the plate 81 for mounting the core holding section 70 and the cylindrical core 10 is mounted on the plate 81 and is vertically moved through the T-shaped fitting 77 of the core holding section 70. A jig cylinder 82 for eccentric movement, a linear guide 83 for guiding the core holding portion 70 to the pusher 21, and a winding groove 11 of the cylindrical core 10 attached to a side surface of the linear guide 83. A core positioner 84 for feeding in accordance with the pitch, a spring plunger 85 for positioning by contacting and pressing a groove of the core positioner 84, a holder 86 for holding the spring plunger 85, and a core positioning portion 80 A stopper 87 is provided for preventing a collision at the forefront end when the vehicle advances.

As shown in FIG. 11, when the wire 24 is wound around the outer periphery of the pusher 21 of the coil holding jig 20 ', a wire preliminary guide 91 for guiding the wire 24 into the winding groove 251. Is located in the circumferential direction of the winding groove 251 of the pusher 21 and is set at a distance that does not interfere even when the core holding unit 70 is moved to the left.

As shown in FIG. 13, the control device includes a controller 100 for monitoring and controlling various operations, and an operation panel 101 for issuing an operation command to the controller 100 and displaying an operation state. A motor controller 102 for controlling the rotation of the motor 41 in accordance with commands from the controller 100; a motor driver 103 for rotating and driving the motor 41 based on an output panel of the motor controller 102; And a syringe 62 of the solvent applicator.
Is controlled based on a command from the controller 100.

Although various sensors are not shown in the embodiments shown in FIGS. 11 and 12, these sensors 106 are all connected to the controller 100 as shown in FIG. By monitoring the information, the operating state of the device can be correctly grasped.

Next, the operation of the inner winding mounting apparatus of the above embodiment will be described with reference to FIGS.

First, as shown in FIG. 15A, the coil holding jig 20 'is located outside the cylindrical core 10 around which the coil is mounted.
Is closed by the air chuck 32 so that the outer diameter of the pusher 21 does not contact the inner diameter of the cylindrical core 10 even when the wire 24 is wound around the outer periphery. That is,
For example, the inner diameter of the cylindrical core 10 is 14 mm, the wire diameter of the wire 24 to be wound is 0.2 mm, and the clearance between the inner diameter of the cylindrical core 10 and the outer diameter of the wound coil is 0.3 mm in the radial direction. , The outer diameter of the pusher 21 is 13m
m.

At this time, the forming guide section 50
Is the rising end, the solvent coating unit 60 is the rising end, the core holding unit 70 is at the right end, and the motor unit 40 is at the origin position where the origin sensor is turned on (the state where the wire hook 28 is at a position as shown in FIG. 11). It is matched.

Next, FIG. 15B shows a state immediately after the start of winding.

The wire 24 is provided with a tension device (not shown).
And the roller 91 of the wire rod preliminary guide 91 shown in FIG.
1 and the starting end of this wire 24
Although not shown, it is grasped by some means (for example, a dedicated arm or the like), and the wire hook 28 in the outer peripheral direction of the pusher 21 is
(See 201 in FIG. 14).
At this time, the wire 24 is positioned so as to enter the winding groove 251 of the pusher 21 in the middle of the path due to the positional relationship between the wire hook 28 and the roller 911 of the wire guide 91.

Next, the controller 100 outputs a drive command to the motor controller 102, and the motor controller 102 rotates the motor 41 by a rotation amount programmed in advance. The rotation of the motor 41 causes the pusher 21 to rotate a predetermined amount while the starting end of the wire 24 is hung on the hook 281. As a result, the wire 24 is reliably wound in the winding groove 251 provided on the outer periphery of the pusher 21 while applying an appropriate tension by the tension device (203).

The pusher 21 wound with the wire 24 having a predetermined number of turns is controlled to stop rotating at the same origin position as in the initial state (FIG. 15A).

FIG. 29 (C) shows a state in which a solvent is applied for line-to-line adhesion.

In order to maintain the winding state of the wire 24 wound around the outer periphery of the pusher 21 in the previous step, it is necessary to apply a solvent to the outer periphery of the wire 24 which is a self-bonding wire and adhere it.

First, the syringe 62 located at the rising end
In order to lower the nozzle 61 to the position of the wire 24,
The air cylinder 67 is operated. The position of the descending end at this time is adjusted by an adjuster 66 that contacts the stopper 65 so that the tip of the nozzle 61 at the tip of the syringe 62 is at an appropriate position with respect to the wire. An appropriate amount of solvent is dropped from the nozzle 61 adjusted to an appropriate position on the wire 24 (205). This drop amount is set in advance in the dispenser 104 shown in FIG. 13 and is set according to various conditions. After dropping a predetermined amount of the solvent, the controller 100 performs an operation of returning the air cylinder 67 and pulling up the syringe 62 to the rising end.

FIG. 29D shows the forming guide 51.
Shows a descending state of.

When the wire 24 of the pusher 21 bonded between the wires in the previous step is styled so as to enter the cylindrical core 10, the origin position of the motor section 40, that is, the wire 24
The forming guide 51 is lowered in a state in which the point where the start end and the end end intersect on the winding groove 251 of the pusher 21 is at the top. Air is supplied to the air cylinder 55 of the forming guide unit 50 to lower the forming guide 51 at the rising end (207). The positioning at the time of descending is adjusted in advance by an adjuster 54 that contacts the stopper 53. This positioning is such that the wire 24 is lightly pressed as shown in FIG.
No cutting force is applied.

Next, the pusher 21 and the wire rod preliminary guide 91
At the intermediate position between the two, the length is cut by a cutter (not shown) to a predetermined length, that is, a length necessary for stylizing the terminal line (209) (FIG. 16).

Thereafter, the controller 100 controls the operation of hooking the cut terminal wire and the terminal wire hooked on the hook portion 281 to the end hook 29 by a dedicated arm or the like (not shown). Need to be done.

FIG. 30E shows a state after the style of the terminal line is taken.

In the previous step, winding is applied to the outer periphery of the pusher 21 so that when the terminal wire is cut into a predetermined length, the wire is inserted into the cylindrical core 10 so as not to be caught, and It is shaped so that the end wire enters the lead-out groove 12 of the cylindrical core 10.

From the state where the forming guide 51 is holding the wire 24 (FIG. 17), as shown in FIG. 18, the terminal wire is hooked on the end hook 29 so that the starting end of the wire 24 is The one temporarily fixed to the hook part 281 is automatically removed, and the end side is hooked on the end hook 29 from the cut state (211). Since the end hook 29 is provided with a groove having the same width as the width of the drawing groove 12 of the cylindrical core 10,
By holding the wire 24, the end wire can be easily positioned in the lead groove 12 of the cylindrical core 10.

FIG. 30 (F) shows a state where the coil holding jig 20 ′ whose winding and styling has been completed is inserted into the core holding portion 70.

In the initial state, since the center position of the pusher 21 and the center position of the core holding portion 70 match, the core holding portion 70 is horizontally moved as it is by a motor and driving means (not shown) such as a ball screw. It is matched with the winding position of the pusher 21 and the position of the winding groove 11 of the predetermined cylindrical core 10 (213). At this time, the groove can be engaged with the groove of the core positioner 84 attached to the side surface of the core holding portion 70 and the fixing spring plunger 85, so that the positioning can be easily performed. If it is necessary to adjust the position with high precision, a positioning method using a servo motor system or the like without using a plunger or the like is also possible. The rotation angle of the core holder 71 is adjusted so that the rotation direction angle of the lead-out groove 12 of the cylindrical core 10 of the core holding unit 70 and the terminal lead wire on the pusher 21 match. Since the outer diameter of the wound state is set so as to have a clearance with respect to the inner diameter of the cylindrical core 10, the winding and the core 10 come into contact with each other when the core holding portion 70 is inserted, so that the coating is broken. No defect is caused.

Next, after the positioning of the winding of the pusher 21 and the winding groove 11 of the cylindrical core 10 is completed, the cylindrical core 10 is eccentric.

In the previous step, the jig cylinder 82 is lowered in a state where the positioning of the winding and the winding groove 11 has been completed, and the holder plate 72 is acted on by the action of the preload spring 78.
Is depressed to cause eccentricity (215). The amount of the eccentricity is determined by the clearance between the winding groove 11 of the cylindrical core 10 and the winding of the pusher 21, and the pressing force is determined by the spring force of the preload spring 78.

The reason for pressing the upper part in advance is as follows.
When the pusher 21 is expanded in the radial direction, the winding on the pusher 21 is fixed only by the adhesive force of the self-bonding wire. It is to prevent.

Thereafter, the pusher 21 is expanded in the radial direction, and the winding on the outer periphery of the pusher 21 is pressed against the winding groove 11 of the cylindrical core 10.

In the previous step, the pusher 21 is radially expanded with respect to the winding groove 11 of the cylindrical core 10 eccentrically positioned, so that the force of the preload spring 78 is exceeded. At the same time, the wire 24 on the outer periphery of the pusher 21 is extended and acts to press against the bottom of the winding groove 11 (217) (FIG. 20). FIG.
As shown in FIG. 1, since the outer periphery of the pusher 21 corresponds to the radius of the bottom of the winding groove 11, the lifting of the coil 13 from the cylindrical core 10 can be prevented. The amount of expansion of the pusher 21 is adjusted by a stopper 39, and the wire 24 is inserted into the winding groove 11 in consideration of deformation of the pusher 21 and the like.
Set it so that it can be pushed into the bottom.

FIG. 31 (G) shows a state after the winding of the pusher 21 has been mounted on the cylindrical core 10.

In the previous step, the winding groove 11 of the cylindrical core 10 was
The pusher 21 pressing the wire 24 against the bottom is closed. Before this, the jig cylinder 82 of the core holding unit 70 is raised, and the eccentricity between the cylindrical core 10 and the pusher 21 is released, so that the cylindrical core 10 collides against the pusher 21 again, thereby preventing the core 10 from being damaged. it can.

When the pusher 21 is closed, the outer circumferential winding groove 2
The wire 24 wound around 51 does not return to a small diameter because it has undergone plastic deformation. In addition, the wire 24 is bonded only to the upper portion at one location and the amount of the solvent dropped is small, so that the wire 24 does not adhere to the pusher 21.

Further, the terminal wire of the wire 24 is also
The wire 24 is not lifted from the inner diameter of the cylindrical core 10 by being pressed by the drawing groove 12.

Next, when the core holding portion 70 is pulled out, a dedicated detaching arm (not shown) is operated to remove the wire 24 from the end hook 29 so that the coil is not pulled from the terminal wire ( 219, 221).

FIG. 31 (H) shows a state where the winding is completed in the winding groove 11 of the cylindrical core 10.

In the previous step, the cylindrical core 10 with the coil mounted in the winding groove 11 is pulled out simultaneously with the core holding part 70 (223).

Since the outer diameter of the pusher 21 and the inner diameter of the cylindrical core 10 have a clearance and the coil does not rise above the inner diameter of the cylindrical core 10 as in the case of insertion, the coil can be easily pulled out. .

Next, after the core holding unit 70 is pulled out, a product take-out command is sent from the controller 100 to another robot or other system, and the other system, such as a robot, sends the cylindrical core 10 to the core holder 71 by the command. , And the above-described series of operations completes the mounting of the winding on the inner periphery of the cylindrical object.

In the above embodiment, the wire diameter is two turns with respect to the winding groove 251. However, it is possible to cope with the case where a thinner wire is used. In this case, as shown in FIG.
Since it is necessary to perform the winding after the layer winding and the previous winding, the conventional wire rod preliminary guide 91 alone requires the winding groove 25.
Since it is difficult to position the wire rod 95 in the position 1, the wire rod 95 is positioned near the outer periphery of the pusher 21 and is moved by the wire diameter per rotation of the pusher 21, so that the aligned winding can be performed.

In the above-described embodiment, the solvent application for indirectly applying the wire 24 is included as an independent step, but a solvent immersion method as shown in FIG. 23 is also possible. In this case, the wire is passed through the wire port 964, is passed through the wire 96, and is hung on two sets of rollers 961, and the wire 24 is immersed in the solvent liquid 965 by the immersion roller 962 in the middle. At this time, if the immersion roller 962 is fixed, the solvent is applied over the entire length of the wire rod, so that the roller support 96 is fixed.
3 is adjusted to the wire feed amount,
The solvent can be applied only to the necessary places, and the step of applying the solvent as in the embodiment becomes unnecessary.

In the above embodiment, the wire 24 on the outer periphery is pushed into the winding groove 11 of the cylindrical core 10 only by the opening / closing operation of the pusher 21, but the pushing between the pusher pieces 21 'divided circumferentially is carried out. May be insufficient.
Therefore, by using the pusher 21 provided with the pushing portion 255 as shown in FIG. 24, it is possible to securely incorporate the winding. In this case, a push-in portion 255 having the same outer diameter as the winding groove 251 of the pusher 21 is formed, and the pitch is adjusted to the pitch of the winding groove 11 of the cylindrical core 10. When mounting the wire 24 in the winding groove 11 of the cylindrical core 10, it is necessary to mount the wire 24 from the back side when viewed from the terminal wire drawing direction regardless of the winding method. Therefore, in the case where the winding is applied to the innermost winding groove 11 of the cylindrical core 10, the portion where the wire 24 is wound around the winding groove 251 in FIG. A series of operations are performed according to the groove 11. Thereafter, the pusher 21 is pulled out by one groove pitch, and the angle of the pusher 21 or the angle in the circumferential direction of the cylindrical core 10 is moved by 45 °. This is to prevent the gap between the pusher pieces 21 'from overlapping again. By performing the opening and closing operation of the pusher 21 in this state, the wire can be pushed in all around, and the winding can be mounted without lifting.

In the above embodiment, the expansion amount is determined by the inner diameter of the cylindrical core 10 and the depth of the winding groove 11, but in order to further reduce the damage to the wire rod, as shown in FIG. By giving the deformation, the elongation of the wire can be suppressed. First, the outer diameter of the pusher 21 at the time of winding is made to be smaller than the inner diameter of the winding groove 11 of the cylindrical core 10 by 1 to 2%, and the outer diameter of the pusher 21 is wound. Performs terminal line styling. Thereafter, the outer diameter of the pusher 21 is closed so as to enter the inner diameter of the cylindrical core 10. At this time, the wire located between the pushers 21 is deformed and stored between the pushers 21 so as not to protrude. Of course, it is needless to say that the shape of the pusher 21 is changed so that a gap is formed between the pushers 21 even when the core is inserted. In the state where the preliminary deformation is applied, the winding is mounted on the winding groove 11 by positioning the cylindrical core 10 in the winding groove 11 and opening the pusher 21 in the same manner as in the above embodiment. At this time,
Pusher 2 provided with push-in portion 255 described in FIG.
By mounting the winding in step 1, the floating can be prevented.

In the above embodiment, the method of fixing the wire to the cylindrical core 10 is not shown. This is because, since the wire itself is plastically deformed, even if the pusher 21 is removed, the wire 24 does not return and come off the cylindrical core 10. That is, the application of the adhesive may be performed before or after the winding is mounted, but as shown in FIG. 26, the syringe is wound in a state where the winding of all the winding grooves 11 of the cylindrical core 10 is completed. Even when the terminal wire is drawn out from the nozzle 110 through the nozzle 111 and an adhesive is applied only to the groove 12, a sufficient adhesive force can be obtained.

In the above-described embodiment of the present invention, the method of expanding the wire in order to mount the coil on the cylindrical core is adopted. In the embodiment, the wire elongation is about 3%.
It has been expanded to become. According to experiments, 15
%, It is known that the wire and the coating will not be damaged. Therefore, there is no fear of damaging the wire in the embodiment of the present invention.

According to this embodiment described above, since the adhesive is not used during the winding or during the mounting of the winding, the trouble of the device due to the influence of the adhesive can be prevented, and the operation rate of the device can be improved. effective.

Further, since the opening and closing dimensions of the coil holding jig for winding and mounting can be freely adjusted, there is also an effect that even if the dimensions of the product are changed, it is possible to respond immediately.

In the above description, the coil holding jig is used for both winding the wire, inserting the wire into the core, and mounting the wire on the inner periphery of the core. However, instead of using one jig, the winding of the wire is performed using another jig, and the wound coil is inserted into the core via the mounting jig, opened in the radial direction, and mounted. Is also good. In short, even if one jig or multiple jigs are used, the outer circumference of the coil mounted on the inner circumference of the core is larger than the outer circumference of the coil wound on the jig. In addition, the coil may be extended by a jig.

In the above-described embodiment, when the coil 13 wound around the outer periphery of the pusher 21 is mounted on the cylindrical core 10, the fluid pressure circuit provided in the opening / closing mechanism 22 of the pusher 21 causes the pusher 21 to rotate. By operating a claw provided on each pusher piece 21 ', the coil 13 is extended. However, the extension of the coil 13 may be performed by other means.

FIGS. 27A and 27B and FIG.
(A), (B) is a sectional view showing another embodiment of the opening and closing mechanism for extending the coil, respectively.

In the embodiment shown in FIGS. 27A and 27B, a rubber actuator 300 is used. A rubber film 301 is mounted on the outer periphery of the rubber actuator 300.

Further, an air passage hole 303 is provided at the center of the rubber actuator 300, and an air assist hole 304 is provided from the air passage hole 303 in the radial direction of the rubber actuator 300. This air assist hole 304
Are provided in the circumferential direction of the rubber actuator 300.

The rubber film 301 has a winding receiving portion 302
And a coil guide 305 are provided.

FIG. 27A shows a rubber actuator 300.
The state before mounting the coil 13 wound on the cylindrical core 10 is shown.

The rubber film 301 is formed so as not to exceed the outer diameter of the rubber actuator 300 even when the coil receiving portion 302 winds the coil 13 in a state where the rubber film 301 is not expanded by pressurized air. I have. Using this rubber actuator 300, the steps from the winding of the coil 13 to the alignment with the winding groove 11 on the inner periphery of the cylindrical core 10 are performed in the same manner as in the above embodiment.

Next, FIG. 27 (B) shows a state in which the coil 13 is mounted on the cylindrical core 10.

By supplying pressurized air to the air passage hole 303 provided at the center of the rubber actuator 300, the pressurized air via the air auxiliary hole 304 pushes the rubber film 301 in the radial direction. Generate strong force. As a result, the coil 13 on the rubber film 301 is pressed against the winding groove 11 on the inner periphery of the cylindrical core 10 while extending. By these operations, the coil 13 can be mounted on the cylindrical core 10. After the coil is mounted, the supply of the pressurized air is stopped, so that the rubber film 301 returns to the shape before the coil is mounted due to the restoring force.

The coil guide 305, which serves as a guide for a wire when winding is performed by the rubber actuator 300, is intermittently provided on the entire circumference, so that expansion of the rubber film 301 is not prevented.

In the mounting of the coil 13 using the rubber actuator 300, a uniform pressing force can be easily obtained over the entire circumference, so that the extension in the coil 13 becomes uniform, and the coating that has been extended earlier can be more effectively removed. Can be prevented.

In the embodiment shown in FIGS. 28A and 28B, an extension jig 310 is used. This extension jig 3
10 has an outer shaft portion 314, a shaft cam 312 incorporated in the center of the outer shaft portion 314, and a coil pushing portion 311 provided in the radial direction of the outer shaft portion 314.

The shaft cam 312 is formed in a smoothly inclined shape along the axial direction of the cylinder. The shaft cam 312 is incorporated so as to be slidable in the axial direction, so that the coil push-out portion 311 projects.

The coil pushing section 311 is provided with an outer shaft section 314.
Are provided around the center of the axis. Each of the coil pushing portions 311 is operated in the protruding direction by the shaft cam 312 and is pushed in the immersion direction by the compression spring 313.

FIG. 28A shows a state before the coil 13 wound on the expansion jig 310 is mounted on the cylindrical core 10.

In this state, the coil pushing portion 311 is in contact with the smallest diameter portion of the shaft cam 312, and the projecting amount of the coil pushing portion 311 is kept to a minimum. In this state, similarly to the above embodiment, the cylindrical core 1 is removed from the winding of the coil 13.
The process is performed up to the position of the inner circumference of the groove 0 for the winding groove 11.

Next, FIG. 28B shows a state in which the coil 13 is mounted on the cylindrical core 10.

When the coil 13 is mounted, the extension jig 310
The shaft cam 312 is moved in a direction in which the coil pushing portion 311 protrudes. As a result, according to the inclination of the shaft cam 312, the coil pushing portions 311 simultaneously project toward the outer peripheral portion of the outer shaft portion 314. By this operation, the coil 13 wound on the coil pushing portion 311 is pressed against the winding groove 11 on the inner periphery of the cylindrical core 10, and the coil 13 can be mounted on the cylindrical core 10. After the coil 13 is mounted, the shaft cam 312 is returned to the original position, whereby the shaft cam 312
A compression spring 313 that makes the coil pushing portion 311 abut against the coil pushing portion 311 is immersed, and then the entire expansion jig 310 is extracted from the cylindrical core 10. The means for pressing and mounting the coil 13 against the winding groove 11 on the inner periphery of the cylindrical core 10 is not limited to the structure of each of the above-described embodiments, but the point is that the diameter of the coil 13 can be evenly expanded at the time of mounting. Any structure is acceptable.

[0151]

According to the present invention described above, a step of winding a wire around the outer periphery of a coil holding jig that can be opened and closed in the radial direction, and inserting the coil holding jig into a cylindrical core, Opening the holding jig in the radial direction, expanding and extending, and mounting the wound coil in the winding groove on the inner periphery of the core. Since the predetermined number of turns and the number of coil layers can be wound around the outer periphery of the holding jig, the winding time can be reduced with a small number of steps and even when the number of turns and the number of coil layers increases. is there.

Further, according to the present invention, a plurality of layers of coils can be simultaneously mounted in the winding groove on the inner periphery of the cylindrical core, and the processing of the coil end wire can be performed in parallel with the coil mounting.
Even if the number of coil layers is increased, there is an effect that the coil mounting operation and the coil end wire processing operation can be performed efficiently.

Further, the number of jigs used, such as coil holding jigs, is small and the configuration is simple, so that it can be realized economically.

In addition, since the wire is plastically deformed, the coil can be uniformly adhered to the winding groove of the core, and floating can be prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of an apparatus according to the present invention.

FIG. 2 is a schematic diagram of a tape running system of a VTR.

FIG. 3 is a sectional view of a cylinder of the VTR.

FIG. 4 is a diagram for explaining a configuration of a rotary transformer.

FIG. 5 is a partially broken perspective view of a cylindrical core.

6 (A) to 6 (F) are explanatory views of steps according to an embodiment of the winding mounting method according to the present invention.

FIGS. 7A and 7B are diagrams for explaining an operation when a coil is mounted.

FIG. 8 is a diagram showing a relationship between elongation and load of a copper wire as a wire material of a coil.

FIG. 9 is a perspective view showing another embodiment of the pusher.

10 (A) to 10 (F) are explanatory views of steps according to another embodiment of the winding mounting method according to the present invention.

FIG. 11 is a perspective view showing a winding mounting device for performing the method of FIG. 10;

FIG. 12 is a front view of the device shown in FIG. 11;

13 is a block diagram of a control device that controls the device shown in FIG.

14 is a flowchart showing an operation procedure in the control device of FIG.

FIGS. 15A and 15B are views for explaining steps of the apparatus shown in FIG. 11;

FIG. 16 is a diagram for explaining a state of winding on a pusher.

FIG. 17 is an explanatory diagram of a forming guide.

FIG. 18 is an explanatory diagram of a forming guide.

FIG. 19 is an explanatory diagram of a forming guide.

FIG. 20 is a diagram for explaining mounting of a coil.

FIG. 21 is a diagram for explaining mounting of a coil.

FIG. 22 is a diagram for explaining another embodiment of the winding.

FIG. 23 is an explanatory view of another embodiment of the solvent application.

FIG. 24 is an explanatory view of another embodiment of the pusher.

FIG. 25 is a view showing another embodiment of the winding to the pusher.

FIG. 26 is an explanatory diagram in the case of applying an adhesive.

FIGS. 27A and 27B are cross-sectional views showing another embodiment of the opening and closing mechanism of the pusher of the coil holding jig.

FIGS. 28A and 28B are cross-sectional views showing another embodiment of the opening and closing mechanism of the pusher of the coil holding jig.

FIGS. 29 (C) to (D) are views for explaining steps of the apparatus shown in FIG. 11;

FIGS. 30 (E) to (F) are diagrams for explaining steps of the apparatus shown in FIG. 11;

FIGS. 31 (G) to (H) are views for explaining steps of the apparatus shown in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Cylindrical core, 11 ... Winding groove, 12 ... Pullout groove, 13 ... Coil, 20 ... Coil holding jig, 21 ... Pusher, 22 ... Opening / closing mechanism.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toshio Kagechi 1410 Inada, Katsuta-shi, Ibaraki Pref. Hitachi, Ltd. Tokai Plant (58) Field surveyed (Int. Cl. ⁶ , DB name) H01F 38/14

Claims (2)

(57) [Claims] 1. A cylindrical rotary transformer provided with a coil comprising a plurality of arc portions and a linearly extended portion formed between the plurality of arc portions. 2. A cylindrical rotary transformer provided with a coil comprising four sets of arc portions and a linearly extended portion formed between the arc portions.