JPS6364043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method and apparatus for winding a rotary transformer for transmitting recording and playback signals for a VTR (video tape recorder, hereinafter abbreviated as VTR) cylinder.

Construction of a conventional example and its problems As shown in FIG. 1, a conventional rotary transformer has a coil 2 set in a groove in the circumferential direction of a flat core 1. but,
Such a configuration has a disadvantage in that the outer diameter of the cylinder becomes large in the case of four channels.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention aims to make the cylinder more compact by making it possible to wind a cylindrical rotary transformer.

Structure of the Invention The present invention is capable of being inserted into a bobbin which has a hollow cylindrical shape and has a plurality of predetermined grooves in the circumferential direction on the inner surface and a plurality of vertical grooves in a direction perpendicular to the circumference, and has a step at the tip. A holder with a attached part and a wire rod wrapped around it,
a nozzle for performing unwinding, a tip portion of which can be inserted into the bobbin, and which faces the stepped portion of the holder;
It consists of a rotatable tail stock that holds the nozzle, and the outer diameter of the VTR silicone is reduced, making the VTR body compact and lightweight, which is extremely advantageous for carrying.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 shows a winding device for a cylindrical rotary transformer according to a first embodiment of the present invention. In FIGS. 3 to 5, 3 is a bobbin holding a coil 4, and 5 is attached to a bracket 7, and has a protrusion that holds the inner surface of the bobbin 8 and can fit into a vertical groove of the bobbin 8. , a holder that prevents the bobbin 8 from rotating; 6 is attached to the bracket 7 and holds the outer surface of the bobbin 8; 9 is positioned by the inner diameter of the bobbin 8, and is used to regulate the width of the coil; It is a tail stock. 10 is a nozzle that guides the wire 14, winds it around the holder 5, unwinds it, and winds it in the inner groove of the bobbin 8; 11 is a flange that holds the tail stock 9 and the nozzle 10; 13;
12 is a compression spring that presses the tail stock 9 with a constant pressure; 12 is a spindle shaft that moves by the diameter of the wire in synchronization with the rotation of the nozzle 10; and 15 is the copper wire 1.
This is a guide roller that guides 4.

The operation of the rotary transformer winding method and device configured as described above will be described below.

First, the outer circumference and inner circumference of the bobbin 8 are held by the outer circumference of the holder 5 and the inner circumference of the holder 6. Next, hold one end of the winding start line of the wire rod 14 with an air chuck or the like, and when the nozzle 10 guiding the wire rod 14 and the vertical groove of the bobbin 8 match, the rotatable tail stock 9 moves forward while holding the nozzle 10. However, the wire rod 14 fits into the longitudinal groove of the bobbin 8 and is guided by the end surface of the tail stock 9 and the stepped end surface of the holder 5. Next, when the spindle shaft 12 starts traversing at the same time as the forward rotation, the wire 14 from the nozzle 10 is wound around the holder 5, and the spindle shaft 12
When the wire rod 14 rotates in the opposite direction, the wire rod 14 from the nozzle 10 expands in the outer circumferential direction, and because it is guided by the end surface of the tail stock 9 and the stepped end surface of the holder 5, it fits into the circumferential groove of the bobbin 8, making it possible to wind the wire. Become. Then, when the positions of the nozzle 10 and the vertical grooves of the bobbin 8 match again, only the nozzle 10 moves back,
Next, the tail stock 9 is moved back, and the end of the winding of the wire 14 is placed in the vertical groove of the bobbin 8.

As described above, according to this embodiment, the wire is wound around the holder using the nozzle held by the tail stock, the wire is wound around the holder while being guided by the holder and the tail stock, and then unwound. The wire can be wound in the circumferential groove of the bobbin, which has a hollow cylindrical shape and has a predetermined groove in the circumferential direction on the inner surface and a vertical groove perpendicular to the circumferential direction.

Effects of the Invention As described above, the present invention enables winding of the wire onto the bobbin by winding the wire onto the holder and unwinding the wire while guiding the wire using the holder and the tail stock. The practical effects are significant.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional rotary transformer.
FIG. 2 is a sectional view of the same, FIG. 3 is a sectional view of a cylindrical rotary transformer, FIG. 4 is a partially broken perspective view of a cylindrical rotary transformer winding device according to an embodiment of the present invention, and FIG. 5 is a partially broken sectional view. 1...Bobbin, 2...Coil, 3...Bobbin,
4... Coil, 5... Holder, 6... Holder, 7... Bracket, 8... Bobbin, 9... Tail stock, 10... Nozzle, 11... Flange, 12... Spindle shaft, 13... Compression Spring,
14... wire rod, 15... guide roller.

Claims (1)

[Claims] 1. A first step of setting the bobbin so that the stepped part at the tip of the holder is in contact with a groove provided in the circumferential direction on the inner surface of the hollow cylindrical bobbin, and holding the nozzle. a second step of inserting a rotatable tail stock into the bobbin and transferring the nozzle to a position where it can be wound around the stepped portion of the holder; and winding the wire from the nozzle around the stepped portion of the holder. A method for winding a rotary transformer, comprising a third step of rotating the wire, and a fourth step of unwinding the wire after the third step and inserting the wire into the groove. 2. A bobbin that is hollow and cylindrical and has a plurality of predetermined grooves in the circumferential direction on the inner surface and a plurality of vertical grooves in a direction perpendicular to the circumference, and that can be inserted into the bobbin and has a stepped part at the tip. a nozzle for winding and unwinding a wire; and a rotatable tail stock whose tip end can be inserted into a bobbin, faces a stepped part of the holder, and holds the nozzle. A winding device for a rotary transformer. 3. The rotary transformer winding device according to claim 2, wherein the holder is provided with a protrusion that can fit into the longitudinal groove of the bobbin.