JPH025402A - Method of fixing winding on inner periphery of cylinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for fixing a cylindrical inner circumferential winding (related to ζ, in particular a winding formed on the inner circumference of a cylindrical core used in a rotary transformer, etc.). The present invention relates to a preferred method for securing windings within grooves.

[Conventional technology]

Conventionally, as a method of fixing a winding wire in a winding groove on the inner circumference of a cylindrical core used in a rotary transformer, etc., for example, Japanese Patent Application Laid-open Nos. 113908/1982 and 130808/1982 are known.
As described in the above issue, a wire is wound in a winding groove formed on the inner periphery of a cylindrical core, and the lead wires at the winding start end and winding end of the wire are also formed on the inner periphery of the cylindrical core. A method has been proposed in which an adhesive is applied to the winding groove or the lead wire groove and cured after the wire is stored in the lead wire groove.

[Problems that the invention attempts to solve]

The above conventional technology prevents troubles caused by misalignment of the winding wire by gluing and fixing the winding wire to the winding groove or leader wire groove on the inner circumference of the cylindrical core, and at the same time prevents the wire from protruding from the groove. This is intended to make the winding work easier than when no adhesive is applied because the gap is allowed, but in practice it has the following problems.

(1) Since the windings are fixed without being in close contact with the winding grooves, when applied to a low retrans, the outer and inner windings are separated by each winding groove. There are places where the signals are close to each other and places where they are far apart, and as a result, signal undulations occur during signal transmission, and the transmission characteristics deteriorate.

((1) Since it is difficult to wind the wire in close contact with the winding groove, it is necessary to design the wire with a margin for groove depth, making it difficult to respond to miniaturization and high performance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for fixing a winding wire in close contact with a winding groove formed on the inner periphery of a cylindrical core, in order to solve the problems of the prior art described above.

[Means to solve the problem]

In order to achieve the above object, the method according to claim 1 provides a method for pushing the winding installed in the winding groove on the inner periphery of the cylindrical core into the bottom surface of the winding groove using a pushing member that can be opened and closed in a radial direction. It is characterized by a step of pressing it so that it fits tightly.

The method according to claim 2 further includes the step of applying and curing an adhesive in the winding groove or the leader groove on the inner circumference of the cylindrical core by applying the winding pushed in in the step. It is characterized by

[Effect]

In the present invention, after the winding is installed in the winding groove formed on the inner periphery of the cylindrical core, a pushing member that can be opened and closed in a radial direction is inserted into the cylindrical core in a closed state, and the protrusion of the member is inserted into the cylindrical core. By positioning the part with respect to the winding groove and opening the member, the winding is pushed into tight contact with the bottom surface of the winding groove. Since the wire material of the winding pushed in in this manner is plastically deformed, the wire remains in close contact with the bottom surface of the winding groove even after the member is closed and pulled out from the core. after that,
By applying an adhesive in the winding groove or the leader wire groove and curing it, the winding can be more reliably fixed in a state in which the winding is brought into close contact with the bottom surface of the winding groove.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a side view showing an example of an apparatus for implementing the present invention, and FIG. 2 is a plan view thereof. This device connects the winding 9 installed in the winding groove 11 on the inner circumference of the cylindrical core 10 to the winding groove 1.
1. Used for fixing in close contact with the bottom surface.

FIG. 3 shows a tape running system of a VTFL in which a cylindrical rotary transformer manufactured by this apparatus is assembled into a cylinder 15.

FIG. 4 is a partially cutaway perspective view of the cylindrical core 10.

As shown in this figure, the cylindrical core 10 is formed with a winding groove 11 in which the winding 9 is mounted in the circumferential direction, and a winding groove 11 is formed in the axial direction perpendicular to the winding groove 11. 9 leader line 9
A leader line groove 12 through which the wire 1 is passed is provided.

The apparatus shown in FIGS. 1 and 2 includes an adhesive applicator 25 that applies adhesive 25 to the inside of the cylindrical core 10, a syringe drive unit that moves the adhesive 25, and a cylindrical core 10. 10
a core holding part 4 for holding the core, a core rotating part for rotating the cylindrical core 10; a winding pushing part 6 for bringing the winding 9 into close contact with the inner winding groove 11 of the cylindrical core 10; It is composed of a base portion 7 that supports the entire device. The configuration of each part is as follows.

The adhesive application part l includes a syringe 2 in which adhesive 25 is stored.
2, a needle 21 that discharges the adhesive 25 from the syringe 22, a syringe retainer that positions and fixes the syringe 22, and a slide table 2 that holds the syringe 22.
6, and a pressure supply pipe 24 that transmits pressure to the adhesive 25 in the syringe 22 and discharges it.

The syringe drive unit also includes a slide guide 36 that comes into contact with the slide table 26 and serves as a guide during movement, and a table drive motor 31 that moves the slide table 26 forward and backward.
Then, the rotation of the motor 31 is rotated in front of the slide table 26.
A ball screw 33 that converts to backward movement, a coupling 32 that connects the motor 31 and the ball screw 33, a screw receiver 34 that supports the ball screw 33, and a nut 35 that transmits the movement of the ball screw 33 to the slide table 26. , a sensor dog 37 that is attached to the nut 35 and detects its position, and a starting end sensor 38 and a ending sensor 39 that detect the sensor dog 37.

The core holding part 4 positions a core holder 41 that holds the cylindrical core 1o and the cylindrical core 10 in the axial direction,
It consists of a core stopper 42 provided with a passive gear on the outer periphery for rotating the core 10, and a bracket 43 that supports these members.

The core rotating section 5 positions the needle 21 in the lead wire groove 12 of the cylindrical core 10 in the adhesive application process, or rotates the core 1 in order to apply the adhesive 25 to the entire circumference of the winding groove 11.
a core rotation motor 51 that rotates the
A driving gear 52 that transmits the rotation of the core stopper 42 to the core stopper 42.
It consists of

The winding pushing part 61 includes a claw 61 which is a pushing member for pushing the winding part into the winding groove 11 of the cylindrical core 10, and a pushing claw opening/closing mechanism 6 which opens and closes the pushing claw 61 in the radial direction.
2, a slide table 63 that serves as a guide when inserting the push-in claw 61 into the cylindrical core 10, a slide stopper 64 that limits the insertion depth of the push-in claw 61 into the cylindrical core 10, and a slide table 63. Push-in claw opening/closing mechanism 6
It consists of a support plate 65 for positioning and fixing 2. As shown in detail in FIG. 6, the push-in claw 61 has four
It is divided into segment-shaped blocks 61 a to 61 d, and the outer periphery of each block has a winding groove protrusion 611 corresponding to the winding groove 11 and the lead wire groove 12 of the cylindrical core 10 and a drawer groove. A line groove protrusion 612 is provided (Fig. 6 shows the tab 6).
1 indicates the closed state).

The base part E includes a base plate 71 that supports each of the above-mentioned parts, a support (A) 72 and a support CB) 73 that serve as fulcrum parts for tilting the base plate 71, and a support that holds the base plate 71 even in an inclined state. It consists of a hanging bottom plate 74.

Next, a method of fixing the cylindrical inner circumferential winding using this device will be explained with reference to FIGS. 5 and 7. FIG. 5 is a process explanatory diagram of the embodiment, and FIG. 7 is an explanatory diagram of pushing the winding wire into the winding groove.

As shown in FIG. 5, the windings 9 are placed in advance in all the winding grooves 11 of the cylindrical core 10 by hand or by a special automatic machine.
The core 10 is positioned in the core holder 41 with the core attached, and its rotational position is determined by the core rotation motor 51
As a result, the core stock 42 having a passive gear on its outer periphery is rotated via the drive gear 52, and the needle 21 of the adhesive application section 2 and one of the leader line grooves 12 of the cylindrical core 10 match. Let's do it like this.

At this time, the adhesive applying part 2 and the winding pushing part 2 are kept on standby at the final end. Furthermore, the base portion 2 inclines the base plate 71 with respect to the horizontal, and the angle is determined by the viscosity of the adhesive 25 and the discharge conditions.

FIG. 5(B) shows a state in which the push-in claw 61 is inserted and positioned in the cylindrical core 10 to which the above-described winding plate is attached. The pushing claw 61 is inserted into the cylindrical core 10 whose depth and rotational direction position with respect to the core holding part A have been determined in the previous step. At this time, the push-in claw 61 is closed to the minimum diameter by the push-in claw opening/closing mechanism 62, and this diameter is the same as that of the cylindrical near 10 in the leader line groove protrusion 612 on the outermost circumference of the push-in claw 61 0.1 to avoid contact with the inner circumference of
Set with a clearance of ~1.0u. Furthermore, when the pushing claw is inserted, the winding pad in the winding groove 11 of the cylindrical core 10 is not in close contact with the bottom surface of the winding groove;
Since it is mounted so as not to protrude from the inner periphery of the core 10, it will not come into contact with the pushing claw 61 and the winding shaft will be destroyed.

Here, a drive source (air, etc.) is supplied to the drive mechanism built in the slide table 63 to advance it to the position of the cylindrical core 10. The insertion depth at this time is limited by the slide stopper 64, and the winding groove protrusion 611 provided on the outer periphery of the push-in claw 61 is made to match the winding groove 11 of the cylindrical core 10. In this state, the push-in claw opening/closing mechanism 62 is operated to open the push-in claws 61 in the radial direction. As a result, as shown in FIG. 7(3)→(B), the winding 9 in the winding @11 is brought into close contact with the bottom surface of the winding groove 11. The pushing force at this time can damage the winding 9 and the cylindrical core 10 by limiting the opening force of the opening/closing mechanism 62 to a certain value or mechanically limiting the stroke of the pushing claw 61. Or don't give it any force that will destroy it.

At the time of this pushing, the winding 9, which was attached by another means, is attached with self-fusion or adhesive to prevent it from collapsing during handling. Deflection or deformation will not concentrate on the book wire and cause it to stand out. In addition, compared to the circularly wound portion of the winding, the leader wire 91- tends to rise above the inner circumference of the cylindrical core 10, so the leader wire groove convex portion 612 provided on the pushing claw 61 allows the leader wire to Even if the lead wire 91 does not come into close contact with the groove 12, the pushing of the leader wire 91 is performed in the same manner.

FIG. 5(C) shows a state in which the winding has been pushed in.

The winding wire 9 that had been brought into close contact with the bottom surface of the winding groove 11 of the cylindrical core 10 in the previous step was pulled out from the cylindrical core 10 by closing the push-in claw 61 since the wire material had been plastically deformed. Even after that, it will never return to its original state. The winding pushing process is completed by driving the pushing claw opening/closing mechanism 62 in the closing direction and retracting the slide table 63.

FIG. 5 (■)) shows the state at the start of the contact 7/n agent application process. In order to apply the adhesive 25 to the winding 9 that was brought into close contact with the bottom surface of the winding groove 11 of the cylindrical core 10 in the previous step, the Q and pull drive motors 31 of the syringe drive unit 3 are rotated, and the coupling 32 and the ball are rotated. Advance the nut 35 through the screw 33. The motor 31 is stopped at the front end. At this time, the tip of the needle 21 at the tip of the syringe 22 on the syringe drive unit 3 is kept in a state where it has passed through the cylindrical core 10.

During this passage, the needle 21 matches the lead line groove 12 of the cylindrical core 10 and is 0.1 to 1.
1) Since it is floated by approximately fl, it will not come into contact with the winding head during passage, lifting the winding head or damaging the surface of the winding H2.

FIG. 5(K) shows a state in the middle of adhesive application.

From the starting state in the previous stage, the table drive motor 31 is reversed, and the nut 35 is retracted via the cup 1J ring 32 and the ball screw 33. In the starting state, the second dollar 21 has passed the core 10 and the sensor dog 37 attached to the nut 35 is not detected by the starting end sensor, so the adhesive 25 is not subjected to discharge pressure from the dispenser (not shown). Not ejected. After that, the adhesive applicator 2 continues to move backward from the syringe active part 31, and the 2 parts at the tip of the syringe 22
．． - When the dollar 21 reaches the top of the leader line groove 12 of the cylindrical core 10, the sensor dog 37 is set to be detected by the starting end sensor 38, so the disbenzer (not shown) is activated from there. , pressure is applied to the adhesive 25 in the syringe 22 and it is discharged from the needle 21. As the syringe 22 continues to move backward in this discharge state, when the needle 2 is pulled out from the cylindrical core 10; this is because the sensor dog 37 is set to be detected by the end sensor 39. , at which point the dispenser (not shown) is stopped and the adhesive 25 in the syringe 22 is released.
The pressurization is interrupted and the discharge from the needle 21 is stopped.

The syringe 22 continues to move backward and is stopped when it reaches the rearmost end.

FIG. 5 (Fl is one leader line groove 12 of the cylindrical core 10
This shows a state in which the application of the adhesive 25 has been completed.

Furthermore, when applying the adhesive 25 to other leader wire grooves 12, the core rotation motor 51 of the core rotation unit 5 is rotated.
By rotating the core stopper 42 via the drive gear 52,
Predetermined leader line groove 12 and needle 21 at the tip of syringe 22
Position core ] 0 so that they match.

Thereafter, the adhesive 25 can be applied to each leader line groove 12 of the cylindrical core 10 by repeating the steps described above.

This is because the present embodiment assumes that the adhesive 25 has low viscosity and high permeability.

By applying only the leader line groove 12 of the cylindrical core 10, the adhesive 2
5 penetrates into the space between the winding groove 1 and the winding groove 1 of the cylindrical core 10, and exhibits adhesive strength. However, if the viscosity of the adhesive 25 is high and it does not penetrate into the winding groove 11 of the cylindrical core ], <, if you want to improve the reliability of adhesive fixation of the winding 9, It is also necessary to apply adhesive to the winding groove 11. In this application method, a rotation detection system is installed in the table drive motor 31 on the syringe drive unit, and the positional relationship between the rotation of the motor 31 and the needle 21 at the tip of the syringe 22 on the syringe drive unit 3 is determined. is calculated, the needle 21 is fed to the position of the predetermined winding groove 11 of the cylindrical core 10, and then, simultaneously with the rotation of the core rotation motor 51, a dispenser (not shown) is
A drive signal is applied to the adhesive 25 in the syringe 22, and the adhesive 25 in the syringe 22 is discharged from the needle 21 to form one cylindrical core 1.
Adhesive 25 is applied to each winding within the winding groove 11.

- By the rotation of the core rotation motor 5J, the core 1
0 rotates and returns to the application start position, a stop signal is given to the dispenser (not shown), the pressure applied to the adhesive 25 in the syringe 22 is interrupted, and the discharge from the needle 21 is stopped. Thereafter, the table drive motor 31 is rotated to move the needle 21 to the position of the next winding groove 11 of the cylindrical core 10. Thereafter, the process of applying the adhesive to the winding grooves 11 described above is repeated to complete the application of the adhesive 25 to all the winding grooves 11 of the cylindrical core 10.

In the above example, when the winding pressing process and the adhesive application process are performed in combination against the winding serial numbers of the cylindrical core (I mentioned this in detail, the purpose of the winding pressing process alone is to tightly fix the windings). It goes without saying that if this can be achieved, the subsequent adhesive application step can be omitted.

〔Effect of the invention〕

According to the present invention, the winding installed in the inner circumferential winding groove of the cylindrical core is pushed into the winding groove using a pushing member that can be opened and closed in a radial direction, thereby pushing the winding into the winding groove. After that, by applying adhesive to the winding wire in the winding groove or the leader wire groove and curing it, the winding can be tightly attached to the bottom surface of the winding groove. Since it can be securely fixed, when applied to a rotary transformer or the like, there will be no variation in the distance between the outer winding side and the same winding side due to each winding groove, and a reduction in transmission characteristics can be prevented.

In addition, since the winding can be easily brought into close contact with the bottom of the winding groove, there is less margin for the groove depth, and the product can be miniaturized and improved in performance.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of an apparatus for implementing the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a schematic diagram of a tape running system of a VTR incorporating a rotary transformer manufactured by this apparatus. Figure 4 is a partially cutaway perspective view of the cylindrical core;
Fig. 5 (3) - (Fl is an explanatory diagram of the process of the first stage of the present invention, Fig. 6 is a detailed view of the push-in claw, (to) is a side view, (
B) is a front view, and FIG. 7 is an explanatory diagram of pushing the winding wire into the winding groove. 10...Cylindrical core 11...Winding groove 12...
Lead wire groove 2...Adhesive application part 5...Core rotation part D...Winding pushing part 61...Pushing member (
611... Convex part for winding groove E... Base part 91... Lead wire 612... Convex part for leader line groove... Winding suspension 1 Illustration agent Patent attorney /J. Isamu Kawakatsu, - Figure 1 Figure (,C) Muro (A) Figure 1

Claims (2)

[Claims] 1. A cylindrical inner periphery comprising the step of pushing a winding installed in a winding groove on the inner periphery of a cylindrical core so that it comes into close contact with the bottom surface of the winding groove using a pushing member that can be opened and closed in a radial direction. How to fix the winding. 2. The cylinder according to claim 1, further comprising the step of applying and curing adhesive to the winding wire pushed in in the step into the winding groove or the leader wire groove on the inner circumference of the cylindrical core. How to fix the inner winding.