JPH0479124B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manual jig for a toroidal coil suitable for application to, for example, a coil for a rotating transformer of a video tape recorder.

Conventionally, this type of toroidal coil has been manufactured mostly by mechanical winding using automatic machines because mass production is required. However, when manufacturing a specially shaped toroidal coil, manual winding may be more efficient than mechanical winding.

A coil 1 for a so-called VTR rotary transformer is often formed into a spiral shape with several turns, and the end 2 of the coil is bent upward or downward, as shown in FIG. 1, for example. In this case, since the coil 1 is made of copper or other metal, the coil 1 itself has rigidity. As a result, it has a tendency to spread outward more than a helical coil. Therefore, when the coil 1 is subsequently fitted into the rotating transformer core, since the outer diameter d of the coil 1 has expanded, it is necessary to readjust the coil 1 before fitting it into the rotary transformer core, which has the disadvantage that the work efficiency is very poor. There is also a risk that the coil 1 shown in FIG. 1 may be deformed during transportation to other processes.

In view of the above, the present invention is a manual jig having a structure that eliminates the drawbacks such as wire rods becoming multi-layered or not having a predetermined diameter during coil manufacturing, and capable of reliably winding the wire into a single layer spirally having a predetermined diameter. The main purpose is to propose.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 2 to 4 are explanatory diagrams of a coil manufacturing process showing an example using the jig of the present invention. First, the second
As shown in the figure, the coil materials 5 are arranged on jigs 6 and 7 for determining their dimensions. The jig 6 is a plate with pins 8 implanted at both ends, and the jig 7 is a plate in which a plurality of grooves 9 corresponding to the wire diameter of the coil material 5 are formed. Then, after placing the jig 7 on top of the jig 6 and hooking the coil material 5 on the pin 8, the coil material 5 is
cut. The length l of the jig 7 is set in advance to match the required length of the completed coil. After that, solder is applied to both ends 5a and 5b of the cut coil material 5, and as shown in FIG. One end 5a is bent to form the bent shape shown. In addition, coil material 5
For example, a fusing agent that melts and sticks when acetone solution permeates the surface is applied. and the fifth
~Wound in a spiral using the jig shown in Figure 6.

FIG. 5 and FIG. 6 are a sectional view and a front view showing an example of the present invention. Reference numeral 20 denotes a fixing jig, and a plurality of convex bodies 22 into which the moving jig 21 is fitted are provided at one end in the circumferential direction. Also, this fixing jig 20
As shown in FIGS. 7 and 8, the moving jig 21 is fitted with a concave groove 23 that fits into the convex body 22, and is moved with the fixing jig 20 as shown in FIG. A compression spring 24 is engaged between the jig 21 and the jig 21 . The moving jig 21 is always biased to the right in the figure by the compression spring 24. Reference numeral 25 indicates a stroke adjusting screw of the moving jig 21, and the rightward bias position of the moving jig 21 is regulated by the screwing dimension of the adjusting screw 25 into the moving jig 21. A first annular groove 26 that matches the inner diameter of the coil is formed in the moving jig 21.
In this case, as shown in FIG. 8, by setting the inner diameter l of the convex body 22 and the concave body 23 to be smaller than the diameter _l1 of the annular groove 26, the moving jig 21 is moved to the left in FIG. By biasing, the convex body 22 of the fixing jig 20 is projected, and the coil wound along the annular groove 26 is released from the annular groove 26 by a uniform pressing force. At the opposite end of the moving jig 21, an engaging protrusion 27 with which the coil setting disk 31 is engaged is implanted at its center.

As shown in FIG. 6, the coil setting disk 31 has a circular hole 32 larger than the engagement protrusion 27 at its center.
A sliding plate 35, which has a circular hole 34 larger than the head 27a of the engaging protrusion 27 in the center thereof, is attached so as to be able to slide while being regulated by a pin 36. The circular hole 34 of the sliding plate 35 is the engagement protrusion 2
A small circular hole 34a equal to the diameter of the neck portion 27b of 7 is continuously drilled, and the engaging protrusion 27 is inserted by initially matching the circular hole 34 of the coil setting disk 31 with the circular hole 32 of the sliding plate 35. and the sixth part of the sliding plate 35
The coil setting disk 31 and the moving jig 21 are brought into close contact by the engagement between the small circular hole 34a and the neck portion 27b of the engagement projection 27 by sliding to the left in the figure. A second groove 38 is formed in the coil setting disk 31 in the radial direction to sandwich the coil end.

Next, a method for manufacturing a coil using this jig 20 will be described. First, by ensuring close contact between the moving jig 21 and the coil setting disk 31, a gap equal to the annular groove 26 is created between the moving jig 21 and the coil setting disk 31, so that the coil setting disk 31 can be bent into an L shape. Insert the coil terminal 5a into the groove 38,
Holding the other end 5b, manually wind it into the groove 26 in a spiral shape. It goes without saying that the widths of the grooves 26 and 38 match the wire diameter of the coil material 5. After completing the necessary winding, the other end 5b of the coil is inserted into the groove 38 and bent into an L shape.

The coil wound in the above steps has a shape as shown in FIG. 4, but at that time, a melting agent such as acetone may be infiltrated into the coil 5c and the end portion 5d. Since the surface of the coil 5 is coated with the melting agent as described above, the coil 5 shown in FIG.
The molded shape of is fixed. After that, the engagement between the moving jig 21 and the coil setting disc 31 is released, the coil setting disc 31 is taken out, and the moving jig 21 is pushed to the left in FIG. 5 against the spring 24. Due to the protrusion of the convex body 22 of the fixing jig 20, the annular coil 5 is moved to the moving jig 2.
It is removed from 1 and production ends. Therefore, since the annularly molded coil is not touched, there is no risk of the coil being deformed. By releasing the pressure on the moving jig 21, the moving jig 21 is returned to its original position by the spring 24, making it possible to perform the next operation.

As described above, according to the present invention, there is provided a moving jig in which a first annular groove corresponding to the inner diameter and wire diameter of a circular coil is formed on the side surface, and a fixing device that fits into a fitting protrusion of the moving jig. A manual jig for an annular coil comprising a jig, and the fixing jig is provided with a hole to be fitted into a fitting protrusion of the movable jig,
The moving jig has a removable coil setting disk that is provided with a second groove that matches the diameter of the coil wire and extends from the circumferential surface toward the center and reaches the first annular groove in order to hold the coil end. The fixed jig has a convex body and the movable jig has a concave groove so that they can fit into each other, and a spring is interposed between the fixed jig and the movable jig, and the coil setting disk is attached to the above-mentioned By removing the moving jig from the moving jig and pushing the moving jig against the spring against the fixed jig, the coil engaged with the first annular groove is disengaged. A ring-shaped coil having a predetermined inner diameter is formed by simply hooking one end of the coil wire material and winding it around the first annular groove, and hooking the other end of the coil wire material into the second groove, By simply biasing the moving jig, it is possible to obtain a coil whose terminal portion is bent at right angles, and furthermore, there is an advantage that no skill is required when manufacturing the annular coil.

Moreover, after the coil is formed, it can be removed from the jig without touching the coil directly, so it can be easily manufactured without changing its shape. Therefore,
In use, simply by setting a large number of the first and second grooves, annular coils of various diameters can be easily obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a coil for a rotating transformer, FIG. 2 is a perspective view showing an example of a jig for cutting coil material, FIG. 3 is a partially sectional perspective view showing a conventional example, and FIG. 5 and 6 are cross-sectional views and front views showing one embodiment of the present invention, and FIGS. 7 and 8 are cross-sectional views and front views of a moving jig. be. 20... fixed jig, 21... moving jig, 22...
... Convex body, 23 ... Concave groove, 24 ... Spring, 26
...First annular groove, 31... Disc for coil set,
38...Second groove.

Claims (1)

[Scope of Claims] 1. A moving jig in which a first annular groove corresponding to the inner diameter and wire diameter of a circular coil is formed on the side surface, and a fixing jig that fits into a fitting protrusion of the moving jig. In the manual jig for a circular coil, the fixing jig is provided with a hole to be fitted into the fitting protrusion of the moving jig, wherein the moving jig holds the end of the coil. For,
A coil setting disk is removably attached, and is provided with a second groove that matches the diameter of the coil wire and reaches the first annular groove from the circumferential surface toward the center, and the fixing jig includes a convex body, The movable jig is provided with concave grooves that can be fitted into each jig, and a spring is interposed between the fixed jig and the movable jig, and the coil setting disk is removed from the movable jig and the movable jig is replaced with the fixed jig. A manual jig for an annular coil, characterized in that the coil is disengaged after being pushed against the spring and engaged with the first annular groove.