JPH0831679A - Coil former - Google Patents

Abstract

PURPOSE:To provide a coil former which can surely form a coil, easily remove the coil and easily form the coils of various shapes. CONSTITUTION:A notch part 1c formed of a horizontal surface la and a tilted surface 1b crossing the horizontal surface 1a at an obtuse angle in a fixed former 1. The sliding surface 2a of a movable former 2 is fitted into the the notch part 1c of the fixed former 1 so as to be slidable along the tilted surface 1b of the fixed former 1 to form a wire winding surface A in the peripheral surface nearly perpendicularly crossing the horizontal surface 1a of the fixed former l in one body with the fixed former 1. A spacer 3 is disposed between the horizontal surface la of the fixed former 1 and the movable former 2. The movable former 2 is fixed to the horizontal surface 1a side through the spacer 3 by a fastening bolt 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding die for forming, for example, a rotating coil of a DC motor or a levitation coil of a linear motor from a wire rod.

[0002]

2. Description of the Related Art FIG. 34 is a plan view of a wire winding coil former disclosed in Japanese Patent Application Laid-Open No. 4-93007, and FIG. 35 is a side sectional view of the coil former.

In the figure, reference numeral 100 denotes a coil winding die. In this coil winding die 100, a concave portion 101a having rounded corners and the same shape as a cored bar portion of a required size is formed in a central portion of an upper surface. It is composed of a side plate, and a mandrel 102 and a mandrel core 103 which are divided into four and are fitted into the recess 101a of the side plate 101. And the core 103
Has a larger diameter at its upper end surface than its lower end surface, and its side surface is an inclined conical surface. In addition, the end surface of each mandrel 102 near the center of the mandrel is also formed as a conical cylindrical surface 102b of the same curvature that is fitted onto the conical surface of the mandrel core 103. Reference numeral 104 is passed through the center hollow hole of the mandrel core 103 and screwed into the center screw hole 101b of the side plate 101 to form a collar portion 104a at the mandrel core 1.
An operation screw 105 for pressing 03 to the side plate 101 side is arranged in a recessed portion diagonally provided at the apex angle of each of the four mandrels 102, and a repulsive force is generated between the inner wall of the apex portion of the side plate 101. This is a coil spring that is generated and presses the mandrel 102 toward the mandrel core 103 side. When the mandrel 102 divided into four parts and the mandrel core 103 are fitted and assembled in the recess 101a of the side plate 101, a constant gap t is formed between the mandrels 102, and further the mandrel 102 The outer peripheral surface of the protruding portion from the side plate 101 forms the winding surface 102a of the wire. Further, the core metal 102 is provided with a winding holding groove 102c.

Next, the operation of the conventional coil former 100 will be described. First, the mandrel 102 and the mandrel core 103 are arranged in the concave portion 101a of the side plate 101, and the operation screw 104 is passed through the center hollow hole of the mandrel core 103 to form the side plate 1.
The flange portion 104a pushes down the mandrel core 103 by screwing it into the central screw hole 101b of 01. As a result, each mandrel 102 is moved outward, the tip of the apex angle comes into contact with the inner wall of the apex angle portion of the concave division 101a of the side plate 101, and stops, and the coil winding form 100 is assembled. And
After inserting the end portion of the wire into the holding groove 102c of the mandrel 102, the winding die is rotated in a predetermined direction, and the wire is wound a predetermined number of times around the winding surface 102a formed by the four mandrels 102 to form a coil. . Next, by loosening the operating screw 104, the repulsive force of the coil spring 105 causes each core metal 102 to retreat to the center of the winding die, and the core metal core 103 is projected outward. As a result, a gap is created between the inner peripheral surface of the wound coil and the outer surfaces of the four cores 102, and the coil is easily removed from the coil winding die 100.

[0005]

However, since the conventional coil winding die 100 is constructed so that the winding start end portion of the wire is inserted and held in the holding groove 102c provided in the cored bar 102, There is a problem that the winding start end of the wire is easily disengaged due to the winding tension and another jig for clamping the unwound end of the wire is required.
Further, when the wire rod is wound up and then removed from the winding die, there is a problem that the winding start end portion of the wire rod is fixed to the holding groove 102c and is unlikely to come off. Further, since the winding surface 102a of the coil formed by the mandrel 102 has a constant shape, the dimensions of the mandrel cannot be adjusted, and different coil windings are required to form coils of different shapes. You need a mold,
There is also a problem that only one coil can be formed with one coil former. The coil winding surface 102
Since the side plate 101 projects right beside a, there is a problem that the coil may not be properly formed when the wire rod is wound by automatic winding, the wire rod is damaged by the side plate 101, or the wire rod gets on the side plate 101 side. . Also,
The coil former has only a single function of coil winding, and the scribe line required for aligning the coil and the lead wire, centering the coil, or clearly indicating the cutting position of the coil is wound. There was also the problem that it could not be put into the coil at that time.

The present invention has been made in order to solve the above-mentioned problems, and the coil can be appropriately formed, the coil can be easily removed, and the coil can be applied to coils of various shapes and sizes. The first purpose is to obtain a winding form. A second object of the present invention is to obtain a coil winding die which can automatically insert a scribe line into a coil when winding the coil. In addition, the winding start end of the wire can be securely fixed to prevent the winding start end from coming off due to the winding tension, and the winding start end after winding the wire is automatically released to remove the coil. A third object of the present invention is to obtain a coil winding die that can be easily manufactured.

[0007]

A first aspect of the present invention is a coil former for winding a wire around an outer peripheral surface to form a coil, which is formed by a horizontal surface and an inclined surface intersecting the horizontal surface at an obtuse angle. The notch has a fixed die in which a part of the winding surface of the wire formed on the outer peripheral surface substantially orthogonal to the horizontal plane is notched, and a slide surface that engages with the inclined surface of the fixed die. The slide surface is fitted into the notch of the fixed mold so as to be slidable along the inclined surface of the fixed mold, and integrated with the fixed mold, the winding surface of the wire is attached to the outer peripheral surface almost orthogonal to the horizontal surface of the fixed mold. A movable die to be formed, a distance changing means capable of changing the distance between the fixed die horizontal surface and the movable die, and a fixing means for pressurizing and fixing the movable die to the horizontal surface side of the fixed die. .

The second invention of the present invention is based on the first invention.
In the invention described above, the distance changing means is composed of a gap adjusting screw screwed so as to project from the back surface of the fixed mold to the horizontal surface side of the cutout portion.

A third aspect of the present invention is the above first aspect.
In the invention of claim 1, a concave portion extending in the sliding direction on one of the fixed-type inclined surface and the movable-type sliding surface, and a convex portion provided on the other of the fixed-type inclined surface and the movable-type sliding surface. The concave portion and the convex portion are fitted to each other so that the movable die slides in the sliding direction without separating the movable slide surface from the fixed inclined surface.

A fourth invention of the present invention is the above-mentioned first invention.
In the invention of, between the horizontal surface side of the fixed mold and the movable mold,
An elastic means is attached to the movable die so as to separate it from the horizontal surface of the fixed die.

A fifth invention of the present invention is the above-mentioned first invention.
In the invention, the fixing means is constituted by a tightening bolt which penetrates the movable mold and is screwed into the fixed mold, and the movable mold is engaged with the tightening bolt to fix the movable mold to the tightening bolt. An engaging body that moves in the forward / backward direction is attached.

The sixth invention of the present invention is based on the first invention.
In any one of the third and third aspects of the invention, a coil scribing means projecting toward the winding surface side of the wire through elastic means is attached to the inner side of the movable die close to the horizontal surface of the fixed die. Is.

A seventh invention of the present invention is the sixth invention.
In the invention, the elastic force adjusting means for moving the elastic means forward and backward with respect to the winding surface of the wire rod of the movable die is attached in the movable die.

An eighth invention of the present invention is the above-mentioned first invention.
In the invention, in the movable mold, a fixed groove is formed toward the horizontal surface of the fixed mold so as to be orthogonal to the horizontal surface, and on the horizontal surface of the fixed mold, while being inserted into the fixed groove,
A convex portion for pressurizing and holding the winding start end portion of the wire is formed between the fixing groove and the inner surface side.

The ninth invention of the present invention is the above-mentioned eighth invention.
In the invention, the pressing surface at the winding start end of the wire formed by the inner surface of the fixed groove and the convex portion is configured to form an obtuse angle with the winding direction of the wire on the winding surface of the wire.

The tenth invention of the present invention is the same as the eighth invention, wherein the winding start end of the wire rod is provided on either the inner surface of the fixing groove for pressing the winding start end portion of the wire rod or the surface of the convex portion. The ridges that form the marking lines are formed on the part.

[0017]

According to the first aspect of the present invention, the fixed die and the movable die fitted in the cutout portion of the fixed die are integrated with each other, and of the outer peripheral surface thereof, they are substantially orthogonal to the horizontal plane of the cutout portion. A wire winding surface is formed on the outer peripheral surface. Therefore, when a wire is wound around this winding surface to form a coil, the winding pressure of the coil is transmitted to the inclined surface of the notch of the fixed mold through the movable mold. Therefore, when the tightening force of the fixing means is loosened, the sliding surface of the movable die slides along the inclined surface of the fixed die due to the winding pressure of the coil, and moves in a direction away from the horizontal surface of the fixed die. Then, a gap is formed between the movable die and the coil, and the coil can be easily removed.

Further, when the movable die is fixed to the fixed die by the fixing means, the horizontal surface of the fixed die and the movable die are moved by the distance changing means while the sliding surface of the movable die is in contact with the inclined surface of the fixed die. If the distance between them is changed, the circumferential length of the winding surface of the wire formed by the outer peripheral surfaces of the movable die and the fixed die is changed according to the shape and size of the coil. Therefore, coils having different shape dimensions can be formed.

According to the second aspect of the present invention, the distance between the horizontal surface of the fixed die and the movable die is adjusted by adjusting the amount of protrusion of the clearance adjusting screw screwed into the fixed die toward the horizontal surface. It can be changed easily.

According to the third aspect of the present invention, the concave and convex portions provided on the fixed die and the movable die facilitate the movement of the movable die with its sliding surface along the inclined surface of the fixed die. And, it is moved without eccentricity.

According to the fourth aspect of the present invention, by releasing the fixing of the movable die to the fixed die by the fixing means, the movable die is separated from the horizontal surface side of the fixed die by the elastic force of the elastic means. For this reason, the movable die is largely separated from the fixed die, not depending on the coil winding pressure.

According to the fifth aspect of the present invention, by loosening the fastening bolt with respect to the fixed die, the engaging body attached to the fastening bolt moves to the movable die side. And
The movable die is separated from the fixed die by the movement of the engagement pair.

According to the sixth aspect of the present invention, when the coil is formed by winding the wire on the winding surface and then the tightening force by the fixing means is loosened, the sliding surface of the movable die is fixed by the winding pressure of the coil. It slides along the inclined surface of the mold and moves in a direction away from the horizontal surface of the fixed mold. Then, along with the movement of the movable die, the scribe means for the coil on the movable die side, which is pressed against the inner surface of the coil through the elastic means, moves, so that the scribe line is inserted in the coil. This time,
When the movable die and the fixed die are provided with the concave portion and the convex portion that are fitted to each other, the movable die slides without eccentricity, and a linear scribing line can be formed in the coil.

According to the seventh aspect of the present invention, since the elastic force of the elastic means can be adjusted by the elastic force adjusting means, the pressure applied by the coil scribing means can be adjusted according to the material of the coil. Therefore, the scribing means for the coil makes it possible to insert an appropriate scribing line into coils made of different materials.

According to the eighth aspect of the present invention, the winding start end of the wire is inserted between the fixed groove of the movable die and the convex portion of the fixed die inserted into the fixed groove, and then the movable die is moved. By sliding the slide surface of the wire along the inclined surface of the fixed mold and fitting it into the notch of the fixed mold, the winding start end of this wire is fixed to the movable mold through the fixing groove and the convex portion. The mold automatically holds the pressure. Further, by separating the movable die from the fixed die by the operation opposite to the above, the pressure holding of the winding start end portion of the wire rod by the fixed groove and the convex portion is automatically released.

According to the ninth aspect of the present invention, since the winding start end of the wire to be pressurized and the winding direction of the wire form an obtuse angle, the winding start end of the wire is bent during winding. The angle is small and winding of the wire is easy.

According to the tenth aspect of the present invention, since the ridge is formed on one of the fixing groove or the convex portion, at the same time when the winding start end of the wire is pressed and held, the ridge of the wire is formed by this ridge. A scribe line can be formed at the winding start end.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a plan view showing a winding state of a coil in a coil former according to a first embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a coil former according to a first embodiment of the present invention. It is sectional drawing which shows the removal state of a coil.

In the figure, reference numeral 1 is a cutout portion 1c formed by a horizontal surface 1a and a flat inclined surface 1b that intersects the horizontal surface 1a at an obtuse angle, and a part of the winding surface A of the wire is cut away. It is a fixed type whose cross section is almost L-shaped. The stationary die 1 has a planar shape of a substantially rectangular shape whose corners are finished in an arc shape, and a part of the wire winding surface A (almost a half circumference) is formed on the outer peripheral surface of the side surface orthogonal to the horizontal surface 1a. Has been done. A screw hole 1d is formed in the central portion of the fixed die 1 on the horizontal plane 1a side so as to be orthogonal to the horizontal plane 1a. 1e is a fixing hole for fixing the winding start end of the wire.

The reference numeral 2 slides along the inclined surface 1b of the fixed mold 1 and is fitted into the cutout portion 1c of the fixed mold 1, and integrated with the fixed mold 1 so as to be orthogonal to the horizontal plane 1a of the fixed mold 1 ( Or, it is a movable type in which the winding surface A of the wire is formed on the outer peripheral surface of the side surfaces that are (or substantially orthogonal). The movable die 2 has the same shape as the cutout portion 1c of the fixed die 1 except for the size in the height direction. That is, the outer side surface of the fixed die 1 and the outer side surface of the movable die 2 are smoothly connected to each other so as to form a flat surface, and the flat inclined surface 2a as a slide surface that abuts the inclined surface 1b is It is formed so as to have an inclination angle opposite to that of the inclined surface 1b. Further, the corners forming the winding surface A of the movable die 2 are finished in an arc shape, and the movable die 2 is penetrated by the upper and lower holes 2b so as to communicate with the screw holes 1d of the fixed die 1. Is provided. The upper and lower holes 2b are formed sufficiently larger than the screw holes 1d.

Numeral 3 is a spacer as a distance changing means capable of changing the distance R between the horizontal surface 1a of the fixed die 1 and the lower surface of the movable die 2. The spacer 3 has a hole portion 3a of the same size at a position facing the upper and lower holes 2b of the movable die 2. Reference numeral 4 denotes the upper and lower holes 2b of the movable mold 2 and the hole 3a of the spacer 3.
Is a tightening bolt as a fixing means which is threaded through the screw hole 1d of the fixed mold 1 and presses and fixes the movable mold 2 and the spacer 3 to the fixed mold 1 side. A sufficient gap K is formed between the tightening bolt 4, the upper and lower holes 2b of the movable mold 2 and the hole 3a of the spacer 3.

Next, the operation of the coil winding die according to the first embodiment will be described. The coil former is
For example, it is assumed that the center of the bottom surface side of the fixed mold 1 is attached to a rotating shaft (not shown) of a winding machine that can rotate at a constant speed. In addition, the wire rod has, for example, a sectional size of 1 mm.
A × 12 mm rectangular copper wire shall be used.

First, after bending one end of the wire rod by 90 ° and inserting it into the fixing hole 1e, the rotary shaft of the winding machine is rotated,
The coil former is rotated, and for example, the wire wound in the reel is wound around the winding surface A of the coil former. At this time, the tightening force of the wire is received by the inclined surface 1b of the fixed die 1 via the inclined surface 2a of the movable die 2,
It acts so as to slide the movable die 2 on the inclined surface 1b of the fixed die 1 so as to be separated from the horizontal surface 1a. But,
The force to slide the movable die 2 is received by the tightening force of the tightening bolt 4, and the outer diameter of the winding surface A is kept constant. Then, the wire is wound on the surface A
When the coil P is formed by winding the wire for a predetermined number of times, the rotation of the coil winding die is stopped and the other end of the wire is cut.

Then, when the tightening bolt 4 is loosened, the sloping surface 2a of the movable die 2 is inclined by the winding pressure of the coil P which presses the movable die 2 toward the inclined surface 2a of the fixed die 1. It slides while contacting along the surface 1b and is displaced outward (in a direction in which the movable die 2 is separated from the horizontal surface 1a),
The inner peripheral surface of the coil P and the side surface outer peripheral surface of the movable die 2 forming a part of the winding surface A are separated from each other, and the coil P is in a state of being easily removed from the coil winding die. After removing the coil P from the coil winding die in this state, the inclined surface 2a of the movable die 2 is removed.
While pressing the fixed mold 1 toward the inclined surface 1b side, the tightening bolt 4
Tighten. By tightening the tightening bolts 4, the movable die 2 slides until the inclined surface 2a abuts the inclined surface 1b of the fixed die 1 and abuts the spacer 3 in the direction approaching the horizontal plane 1a. Then, the movable die 2 is fixed to the fixed die 1 by the tightening bolts 4, the coil winding die is assembled, and the coil P is manufactured again.

The tightening bolt 4 and the upper and lower holes 2 of the movable mold 2
Since a sufficient gap K is formed between the inner surface of b and the inner surface of b, the inclined surface 2a of the movable die 2 can be sufficiently moved along the inclined surface 2a of the fixed die 1 without removing the tightening bolt 4. You can slide it.

In the case of manufacturing the coil P having a small inner cavity, the spacer 3 is replaced with a thicker one. As a result, the movable die 2 is positioned above the cutout portion 1c of the fixed die 1, so that the fixed die 1
Due to the relationship between the inclined surface 1b of the movable die 2 and the inclined surface 2a of the movable die 2, the outer surface of the movable die 2 facing the inclined surface 2a is pulled inward of the fixed die 1. Therefore, the circumferential length of the winding surface A of the coil former becomes smaller by that amount, and the coil P easily forms the coil P having a small inner cavity.

The tightening bolt 4 and the upper and lower holes 2 of the movable mold 2
Since a sufficient gap K is formed between the movable die 2 and the inner surface of b, even in this case, the movable die 2 is fixed to the fixed die 1 by the winding pressure of the coil P only by loosening the tightening bolt 4.
The coil P can be easily removed from the coil former by being slid inward.

As described above, in the coil winding mold according to the first embodiment, the winding of the wire is not inconveniently performed on the winding surface A, the coil can be reliably formed, and the coil P can be easily removed. Therefore, by attaching this coil former to the winding machine for automatic winding,
The coil P is formed quickly and easily without any trouble. At this time, unlike the conventional coil former, there is no side plate projecting just beside the winding surface of the coil, so that the coil is not scratched and the wire rod does not run over the side plate. Further, in this coil winding form, the shape and size of the winding surface A can be changed only by changing the thickness of the spacer 3, so that the coils P having various shape and sizes can be easily formed, and the versatility is improved. An excellent coil winding form can be obtained.

Embodiment 2 FIG. 4 and 5 are a plan view and a sectional view, respectively, showing a coil former according to a second embodiment of the present invention.

In the second embodiment, the horizontal surface 1a of the fixed die 1 is used.
On the side, a plurality of screw holes 10 are provided so as to penetrate therethrough.
The tip of the clearance adjusting screw 11 as a distance changing means that is screwed into 0 is projected toward the horizontal surface 1a, and the protruding length of the clearance adjusting screw 11 causes the horizontal surface 1a of the fixed mold 1 and the lower surface of the movable mold 2 to move. The distance R is adjusted. The other structure is the same as that of the coil former of the first embodiment.

Therefore, in the coil former according to the second embodiment, the size of the winding surface A can be changed only by adjusting the protruding length of the gap adjusting screw 11 from the horizontal surface 1a. Therefore, in this coil former, unlike the coil former according to the first embodiment, it is not necessary to prepare various spacers 3 having different thicknesses and replace the spacers 3 according to the shape and size of the coil. Coils of various geometries can be easily manufactured. In addition, also in the second embodiment, the same effect as that of the first embodiment can be obtained.

Example 3. 6 and 7 are a plan view and a sectional view, respectively, showing a coil former according to a third embodiment of the present invention.

In the third embodiment, the inclined surface 1b of the fixed die 1 is used.
A slide groove 12 is formed on the inner side of the inclined surface 1b as a concave portion that is enlarged inward along the sliding direction, and is fitted into the slide groove 12 on the side of the inclined surface 2a of the movable die 2 to slide. A guide 13 is provided as a movable convex portion. The other structure is the same as that of the coil former of the first embodiment.

Therefore, in the coil winding die according to the third embodiment, when the slide groove 12 and the guide 13 are fitted to each other, the guide 13 of the movable die 2 is guided by the slide groove 12 and the inclined surface 2a is always fixed. It slides while being in contact with the inclined surface 1b of the mold 1. Therefore, in this coil winding die, the upper and lower holes 2b of the movable die 2 and the hole 3a of the spacer 3 are not pressed to the movable die 2 to the inclined surface 1b side of the fixed die 1.
Without eccentricity of the movable die 2, that is, the outer surface of the fixed die 1 and the outer surface of the movable die 2 by simply tightening the tightening bolts 4 penetrating through the and screwed into the screw holes 1d of the fixed die 1. It can be assembled to the fixed mold 1 so that and form a plane. Therefore, according to the third embodiment, it is possible to easily ensure the uniformity of the shape and size of the winding surface a of the coil winding die and to improve the assembling property thereof. In addition, also in the third embodiment, the same effect as that of the first embodiment can be obtained.

In the third embodiment, the slide groove 12 is extended in the sliding direction on the inclined surface 1b side of the fixed die 1, and is engaged with the slide groove 12 on the inclined surface 2a side of the movable die 2. Although the slidable guide 12 is provided, a guide (convex portion) is provided on the inclined surface 1b side of the fixed die 1, and the slidable surface 2a side of the movable die 2 can be engaged and slid on this guide. Even if the sliding groove (recess) is extended in the sliding direction, the same effect can be obtained.

Example 4. 8 is a plan view showing a winding state of a coil in a coil former according to a fourth embodiment of the present invention, FIG. 9 is a sectional view of FIG. 8, and FIG. 10 is a coil former according to a fourth embodiment of the present invention. It is sectional drawing which shows the removal state of a coil.

In the fourth embodiment, in the coil winding die according to the first embodiment, the diameter of the lower part of the upper and lower holes 2b of the movable die 2 is expanded to form a spring hole 14 in the movable die 2 and the spring is formed. A compression spring 15 as an elastic means is attached to the outside of the tightening bolt 4 in the hole 14. The other structure is the same as that of the coil former of the first embodiment.

In the coil winding die according to the fourth embodiment, the movable die 2 resists the elastic force of the compression spring 15 and the movable die 2 tightens the tightening bolt 4.
Since it is fastened and fixed to the fixed mold 1 side, the movable mold 2 is separated from the horizontal surface 1a of the fixed mold 1 by the elastic force of the compression spring 15 by the amount by which the tightening bolt 4 is loosened. Therefore, in this coil winding die, the movable die 2 is moved to the horizontal plane 1a of the fixed die 1 without depending on the winding pressure of the coil P.
Can be sufficiently separated from the above, and the removal of the coil P can be facilitated accordingly. In addition, also in the fourth embodiment, the same effect as that of the first embodiment can be obtained.

Example 5. 11 is a plan view showing a winding state of a coil in a coil former according to a fifth embodiment of the present invention, FIG. 12 is a sectional view of FIG. 11, and FIG. 13 is a coil former according to a fifth embodiment of the present invention. It is sectional drawing which shows the removal state of a coil.

In the fifth embodiment, in the coil winding die according to the third embodiment, the diameter of the lower portion of the upper and lower holes 2b of the movable die 2 is expanded to form a spring hole 14 in the movable die 2 and the spring is formed. A compression spring 15 as an elastic means is attached to the outside of the tightening bolt 4 in the hole 14. The rest of the configuration is the same as the coil former of the third embodiment.

In the coil winding die according to the fifth embodiment, the movable die 2 is tightened by the tightening bolt 4 against the elastic force of the compression spring 15.
Since it is fastened and fixed to the fixed mold 1 side by the fixed mold 1, the guide 13 of the movable mold 2 is guided by the slide groove 12 and the elastic force of the compression spring 15 causes the fixed mold 1 to move. Away from the horizontal plane 1a without eccentricity. Therefore, in this coil winding die, the movable die 2 can be sufficiently separated from the horizontal surface 1a of the fixed die 1 without depending on the winding pressure of the coil P, and the coil P can be easily removed by that amount. be able to. In addition, also in the fifth embodiment, the same effect as that of the third embodiment can be obtained.

Example 6. 14 is a plan view showing a wound state of a coil in a coil former according to a sixth embodiment of the present invention, FIG. 15 is a sectional view of FIG. 14, and FIG. 16 is a coil former according to a sixth embodiment of the present invention. It is sectional drawing which shows the removal state of a coil.

In the sixth embodiment, in the coil winding die according to the first embodiment, the lower portion of the upper and lower holes 2b of the movable die 2 is expanded to form the step hole 16 in the movable die 2.
An engagement body 17 fitted in the step hole 16 is attached to the tightening bolt 4. The other structure is the same as that of the coil former of the first embodiment.

In the sixth embodiment, by rotating the tightening bolt 4, the engaging body 17 that engages with the movable die 2 through the step hole 16 also advances and retreats together with the tightening bolt 4.
For example, by loosening the tightening bolt 4, the engaging body 17
Acts to push the movable die 2 upward through the step hole 16, and the movable die 2 is separated from the horizontal surface 1a side of the fixed die 1. Therefore, in this coil winding die, the movable die 2 can be sufficiently separated from the fixed die 1 without depending on the winding pressure of the coil P, so that the coil P can be easily taken out accordingly. it can. In addition, also in the sixth embodiment, the same effect as that of the first embodiment can be obtained.

Embodiment 7 FIG. 17 is a plan view showing a wound state of a coil in a coil former according to Embodiment 7 of the present invention, FIG. 18 is a sectional view of FIG. 17, and FIG. 19 is a coil former according to Embodiment 7 of the present invention. It is sectional drawing which shows the removal state of a coil.

In the seventh embodiment, in the coil winding die according to the third embodiment, the lower part of the upper and lower holes 2b of the movable die 2 is expanded to form the step hole 16 in the movable die 2.
An engagement body 17 fitted in the step hole 16 is attached to the tightening bolt 4. The rest of the configuration is the same as the coil former of the third embodiment.

In the seventh embodiment, by rotating the tightening bolt 4, the engaging body 17 that engages with the movable die 2 through the step hole 16 also advances and retreats together with the tightening bolt 4.
For example, by loosening the tightening bolt 4, the engaging body 17
Acts to push the movable die 2 upward through the step hole 16. Therefore, the movable die 2 is separated from the fixed die 1 on the side of the horizontal plane 1a without being eccentric because the guide 13 is guided by the slide groove 12. Therefore, in this coil winding die, the movable die 2 can be sufficiently separated from the fixed die 1 without depending on the winding pressure of the coil P, so that the coil P can be easily taken out accordingly. it can.
In addition, also in the seventh embodiment, the same effect as that of the third embodiment can be obtained.

Example 8. 20 is a plan view showing a wound state of a coil in a coil former according to Embodiment 8 of the present invention, FIG. 21 is a sectional view of FIG. 20, and FIG. 22 is a coil former according to Embodiment 8 of the present invention. It is sectional drawing which shows the removal state of a coil.

In the figure, 18 is on the lower surface side of the movable mold 2,
It is a marking hole provided on the winding surface A facing the inclined surface 2a. The scribed hole 18 is composed of a large diameter portion 18a and a small diameter portion 18b which differ in size in steps. 1
9 A compression spring as an elastic means mounted in the large diameter portion 18a inside the scribing hole 18, 20 is a stopper attached to one end of the compression spring 19 so as to be movable in the large diameter portion 18a, 21 Is attached to the stopper 20 and the scribing hole 1
8 is a scribing needle as a scribing device that projects outward through the small-diameter portion 18b. In addition, other configurations are the same as those in the first embodiment.
This is the same as the coil former for.

The operation of the scribing needle 21 will be described. When the wire is wound around the winding surface A of the coil former, the scribing needle 21 compresses the compression spring 19 by the winding pressure of the wire and scribing. It is in a state of having entered the hole 18. In this case, the tip of the scribing needle 21 is in a state of pressing the lower portion on the inner surface side of the coil P. Next, when the tightening bolt 4 is loosened, the inclined surface 2a of the movable die 2 slides upward while contacting the inclined surface 1 of the fixed die 1 due to the winding pressure of the coil, so that the movable die 2 is fixed. Away from the horizontal plane 1a. At this time, the scribing needle 21 moves upward together with the movable die 2 in a state where the tip end portion of the scribing needle 21 pressurizes the inner surface side of the coil P by the repulsive force of the compression spring 19, and the scribing needle 21 inner surface of the coil P. You can insert a marking line.

As described above, in the eighth embodiment, since the scribing needle 21 that moves together with the movable die 2 is provided inside the movable die 2, when the coil P is removed from the coil winding die. With the scribing needle 21, for example, a scribing line for aligning the coil can be formed in a necessary portion of the coil P. Therefore, in this coil former, it is not necessary to perform scribing work on the coil P separately, and it is possible to facilitate and speed up the production of the coil P. In addition, also in the eighth embodiment, the same effect as that of the first embodiment can be obtained.

Example 9. 23 is a plan view showing a wound state of a coil in a coil former according to a ninth embodiment of the present invention, FIG. 24 is a sectional view of FIG. 23, and FIG. 25 is a coil former according to a ninth embodiment of the present invention. It is sectional drawing which shows the removal state of a coil.

In the ninth embodiment, in the coil winding die according to the third embodiment, the inclined surface 2a on the lower surface side of the movable die 2 is used.
An engraving hole 18 having a large-diameter portion 18a and a small-diameter portion 18b, which are different in size in a stepwise manner, is provided on the winding surface A facing to each other, and an elastic means is provided in the large-diameter portion 18a inside the engraving hole 18. The compression spring 19 is attached, and the compression spring 1
A stopper 20 is attached to one end of 9 so as to be movable in the large-diameter portion 18a, and further, a scoring needle 21 as a scribing means so as to project outward through the small-diameter portion 18b of the scribing hole 18.
Is attached to the stopper 20. The rest of the configuration is the same as the coil former of the third embodiment.

The operation of the scribing needle 21 will be described. When the wire is wound around the winding surface A of the coil winding die, the scribing needle 21 compresses the compression spring 19 by the winding pressure of the wire and scribing. It is in a state of having entered the hole 18. In this case, the tip of the scribing needle 21 is in a state of pressing the lower portion on the inner surface side of the coil P. Next, when the tightening bolt 4 is loosened, the guide 13 of the movable die 2 is guided by the slide groove 12 of the fixed die 1 by the winding pressure of the coil, and the inclined surface 2a of the movable die 2 becomes the inclined surface of the fixed die 1. The movable die 2 is slid upward while contacting the movable die 2
Moves away from the horizontal surface 1a of the fixed mold 1. At this time, the scribing needle 21 moves upward together with the movable die 2 in a state in which the tip end portion presses the inner surface side of the coil P by the urging force of the compression spring 19, and the scribing needle 21 moves the inner surface of the coil P inside. The marking line can be straight, accurate, and uniform.

As described above, in the eighth embodiment, the slide groove 12 is extended on the inclined surface 1b of the fixed die 1 in the sliding direction, and the guide 13 is fitted on the inclined surface 2a of the movable die 2 into the slide groove 12. Further, since the scribing needle 21 that moves together with the movable die 2 is provided inside the movable die 2, when the coil P is removed from the coil winding die, the scribing needle 21 causes the coil P to move. For example, a marking line for aligning the coil can be linearly formed in a necessary portion of the. Therefore, in this coil former, it is not necessary to perform scribing work on the coil P separately, and it is possible to facilitate and speed up the production of the coil P. In addition, also in the eighth embodiment, the same effect as that of the third embodiment can be obtained.

Example 10. 26 and 27 are a plan view and a sectional view showing a coil winding die according to Embodiment 10 of the present invention.

In the tenth embodiment, in the coil winding die according to the eighth embodiment, from the inclined surface 2a side of the movable die 2,
A tightening bolt hole 22 communicating with the scribe hole 18 is formed, and a spring pressure adjusting screw 23 as elastic force adjusting means is screwed into the scribe hole 18 side of the tightening bolt hole 22,
The other end of the compression spring 19 is supported by the spring pressure adjusting screw 23. In this case, a wrench groove 23a for a hexagon wrench, for example, is formed at the end of the spring pressure adjusting screw 23. The rest of the configuration is the same as that of the coil former of the eighth embodiment.

In the tenth embodiment, since the hexagonal wrench inserted into the wrench groove 23a through the tightening bolt hole 22 moves the spring pressure adjusting screw 23 forward and backward with respect to the scribing hole 18, this spring pressure adjusting is performed. Compression spring 1 by screw 23
9 can be moved back and forth with respect to the winding surface A of the movable mold 2, and the spring pressure of the compression spring 19 can be easily adjusted. Therefore, in this coil former, the scribing needle 21 can be pressed to the coil P side by the pressing force appropriately adjusted according to the material of the coil P, and the scribing needle 21 changes the material of the coil P. You can insert the appropriate marking line. In addition, also in the tenth embodiment, the same effect as that of the eighth embodiment is obtained.

Example 11. 28 and 29 are a plan view and a sectional view, respectively, showing a coil winding die according to Embodiment 11 of the present invention.

In the figure, 24 is a fixed groove formed on the side surface of the movable mold 2 so as to be orthogonal to the horizontal plane 1a of the fixed mold 1 and having a rectangular cross section. 25 is a movable groove on the horizontal plane 1a of the fixed mold 1. It is a convex portion having a rectangular cross section provided so as to be inserted into the second fixing groove 24. The convex portion 25 is formed sufficiently smaller than the fixed groove 24, and one surface thereof and the inner surface of the fixed groove 24 form a pressurizing portion L for pressurizing and fixing the winding start end portion of the wire rod. In this case, the winding surface A of the movable die 2 on the fixed groove 24 side is formed inward by the thickness of the wire so that the wire can be wound comfortably. The other structure is the same as that of the coil former of the first embodiment.

Next, the operation of the pressing portion L will be described. The winding start end portion of the wire, that is, the winding start end portion P1 of the coil P is bent by 90 °, and the fixing groove 24 and the convex portion 25 are formed.
It is inserted into the pressurizing unit L composed of. Then, the inclined surface 2a of the movable die 2 is slid down while being pressed against the inclined surface 1b of the fixed die 1 to move the movable die 2 into the cutout portion 1c of the fixed die 1.
When it is fitted inside, the width of the pressing portion L is also narrowed, and the winding start end portion P1 of the coil P is gripped between the fixed groove 24 and the convex portion 25. Therefore, by tightening the tightening bolt 4, the winding start end of the wire is sufficiently pressed and held by the pressing portion L. Further, when the formation of the coil P is completed and the tightening bolt 4 is loosened, when the inclined surface 2a of the movable die 2 slides along the inclined surface 1b of the fixed die 1 by the winding pressure of the coil P, pressure is applied. The width of the portion L also becomes large, and the winding start end portion P1 of the coil P can be easily removed from the pressing portion L.

As described above, according to the eleventh embodiment, since the pressure at the winding start end of the wire rod can be maintained in association with the movement of the movable die 2, the wire rod is wound at the beginning of winding the wire rod. The winding start end is reliably held under pressure, and when the coil P is removed, the winding start end P1 of the coil P is automatically and reliably released. Therefore, in this coil former, the wire can be easily wound around the winding surface A without worrying about the detachment of the end portion due to the winding tension, and the coil P can be easily removed from the winding surface A side. You will be able to do it.
In addition, also in the eleventh embodiment, the same effect as that of the first embodiment is obtained. In addition, the pressing portion L may be provided on the opposite surface of the movable mold 2 so that the wire can be wound in either the left or right direction.

Example 12 30 and 31 are a plan view and a sectional view, respectively, showing a coil winding die according to Embodiment 12 of the present invention.

In the twelfth embodiment, the pressing portion L formed by the fixed groove 24 provided on the movable die 2 and the convex portion 25 provided on the fixed die 1 is aligned with the winding direction of the wire on the winding surface A. It is formed so as to form an obtuse angle α. The other structure is the same as that of the coil winding die of the eleventh embodiment.

Therefore, in this coil winding form, when the winding start end of the wire is held in the pressing portion L and then the wire is wound around the winding surface A, the winding start end of the wire is simply bent. Can be wound, and the work of winding the wire can be facilitated. In addition, this Example 12
Also in the above, the same effect as that of the above-mentioned Example 11 is obtained. Also in this case, the pressing portion L may be provided on the opposite surface of the movable die 2 so that the wire can be wound in either the left or right direction.

Example 13 32 and 33 are a plan view and a sectional view, respectively, showing a coil winding die according to Embodiment 13 of the present invention.

In the thirteenth embodiment, a sharp scoring ridge 26 is formed in the vertical direction on the outer surface of the convex portion 25 provided on the fixed mold 1 forming the pressing portion L. In addition,
The other structure is the same as that of the coil winding die of the eleventh embodiment.

Therefore, in this coil former, a marking line can be formed at the winding start end P1 of the coil P at the same time when the coil P is formed, and the lead-out portion of the coil P to the winding start end P1 can be formed. It is possible to facilitate mounting work (not shown) and the like. In addition, also in the thirteenth embodiment, the same effect as that of the eleventh embodiment is obtained. Further, in this case, the protrusion 26 may be formed on the inner surface side of the fixed groove 24.
Further, the pressing portion L may be provided on the surface on the opposite side of the movable die 2 so that the wire can be wound in any of the left and right directions.

Here, by combining the respective characteristic parts of the coil winding forms shown in the first to thirteenth embodiments with each other, a coil winding form having at least these effects can be formed. Of course you can.

It should be noted that description of the distance changing means such as the spacer 3 and the gap adjusting screw 10 is omitted in the coil winding forms of the fifth to thirteenth embodiments shown in FIGS. 11 to 33.

In each of the above embodiments, the inclined surface 1b of the fixed die 1 and the inclined surface 2a of the movable die 2 are formed in a flat shape, but the inclined surfaces 1b, 2a are not limited to a flat shape, and may be a horizontal surface. It suffices that the cross-sectional shape parallel to 1a is the same in the sliding direction, and the inclined surfaces 1b and 2a may be arc-shaped, for example.

[0082]

Since the present invention is constituted as described above, it has the following effects.

According to the first aspect of the present invention, in the coil former for winding the wire around the outer peripheral surface to form the coil, the notch portion formed by the horizontal surface and the inclined surface intersecting the horizontal surface at an obtuse angle. , A fixed type in which a part of the winding surface of the wire formed on the outer peripheral surface that is substantially orthogonal to the horizontal plane is cut out, and a sliding surface that engages with the inclined surface of the fixed type is loaned, and this sliding surface is fixed It is slidably moved along the inclined surface of the die and is fitted into the cutout portion of the fixed die, and integrated with this fixed die, the winding surface of the wire is formed on the outer peripheral surface substantially orthogonal to the horizontal plane of the fixed die. Since the movable die has a distance changing means capable of changing the distance between the horizontal surface of the fixed die and the movable die, and a fixing means for pressurizing and fixing the movable die to the horizontal surface side of the fixed die, the coil When the The removal of the coil is also made easy, and can be easily formed coil of various shapes.

According to a second aspect of the present invention, in the first aspect of the invention, the gap adjusting screw is screwed so that the distance changing means is screwed so as to project from the rear surface of the fixed die to the horizontal surface side of the cutout portion. In addition to the effect of the first aspect of the invention, the distance changing means has a simple structure, and
The distance between the horizontal surface of the fixed die and the movable die can be easily changed, and coils of various shapes can be formed more easily.

According to a third aspect of the present invention, in the first aspect, a concave portion extending in the sliding direction is provided on one of the fixed type inclined surface and the movable type sliding surface, and the fixed type is provided. The movable mold is provided with a convex portion provided on the other side of the inclined surface and the movable slide surface, and the concave portion and the convex portion are fitted to each other so that the movable slide surface is not separated from the fixed inclined surface. Since it is slid in the sliding direction, in addition to the effect of the first aspect of the invention, the movable die can be slid without eccentricity, and the uniformity of the shape and size of the winding surface can be easily ensured. The assembling property can be improved.

According to a fourth aspect of the present invention, in the first aspect, the movable die acts between the fixed die horizontal surface side and the movable die so as to separate the movable die from the fixed die horizontal surface. Since the elastic means is attached, in addition to the effect of the first aspect of the invention, the movable die can be easily and reliably separated from the fixed die, and the coil can be formed and removed more easily.

According to a fifth aspect of the present invention, in the first aspect, the fixing means is constituted by a tightening bolt that penetrates the movable die and is screwed into the fixed die.
Since the engaging body that engages with the movable die and moves the movable die in the advancing / retracting direction of the fastening bolt is attached to the fastening bolt, the same effect as the fourth aspect of the invention can be obtained.

Further, according to a sixth aspect of the present invention, in the first or third aspect of the invention, the winding surface of the wire rod is provided on the inner side of the movable die near the horizontal plane of the fixed die through elastic means. Since the scribing means for the coil projecting to the side is attached, in addition to the effect of the first or third invention, the scribing line required for the coil can be formed at the same time when the coil is formed. The scribe line can be formed linearly, and the manufacturing process of the coil can be simplified.

According to the seventh invention of the present invention, in the sixth invention, the elastic force adjusting means for moving the elastic means forward and backward with respect to the winding surface of the wire rod of the movable die is attached in the movable die. Therefore, in addition to the effect of the sixth aspect of the invention, the pressing force of the scribing means for the coil can be adjusted according to the material of the coil, and an appropriate scribing line can be formed on the coil.

According to an eighth aspect of the present invention, in the above-mentioned first aspect, a fixed groove is formed in the movable mold so as to extend toward the horizontal surface of the fixed mold so as to be orthogonal to the horizontal surface, and the fixed groove is formed. Since the convex portion that is inserted into the fixing groove and pressurizes and holds the winding start end of the wire is formed between the fixing groove and the inner surface side of the fixing groove on the horizontal surface of the mold. In addition to the effect of, the pressure at the winding start end of the wire can be easily and reliably maintained, and the pressure at the winding start end of the wire can be maintained by loosening the pressure applied to the fixed mold by the fixing means. Is automatically released, and the coil can be easily manufactured.

Further, according to the ninth invention of the present invention, in the above-mentioned eighth invention, the pressing surface of the winding start end portion of the wire rod by the inner surface of the fixing groove and the convex portion is Since it is configured so as to form an obtuse angle with the winding direction, in addition to the effect of the eighth aspect of the invention, the wire rod can be wound around the winding surface by only slightly bending the winding start end of the wire rod. It can be facilitated.

According to the tenth aspect of the present invention,
In the eighth aspect of the invention, since the protrusion for forming the marking line is formed on the winding start end of the wire rod, either on the inner surface of the fixing groove for pressing the winding start end of the wire rod or on the surface of the convex portion. In addition to the effect of the eighth aspect of the present invention, the required marking line can be formed at the winding start end of the coil at the same time as the coil is manufactured, and the coil manufacturing process can be simplified.

[Brief description of drawings]

FIG. 1 is a plan view showing a wound state of a coil in a coil former according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the coil winding die of FIG.

FIG. 3 is a cross-sectional view showing a detached state of the coil in the coil winding form according to the first embodiment of the present invention.

FIG. 4 is a plan view showing a coil former according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a coil former according to a second embodiment of the present invention.

FIG. 6 is a plan view showing a coil former according to a third embodiment of the present invention.

FIG. 7 is a sectional view showing a coil former according to a third embodiment of the present invention.

FIG. 8 is a plan view showing a wound state of the coil in the coil winding die according to the fourth embodiment of the present invention.

9 is a cross-sectional view of the coil winding die of FIG.

FIG. 10 is a cross-sectional view showing a detached state of a coil in a coil winding die according to Embodiment 4 of the present invention.

FIG. 11 is a plan view showing a wound state of the coil in the coil winding die according to the fifth embodiment of the present invention.

12 is a cross-sectional view of the coil winding die of FIG.

FIG. 13 is a cross-sectional view showing a detached state of the coil in the coil winding die according to the fifth embodiment of the present invention.

FIG. 14 is a plan view showing a wound state of the coil in the coil winding die according to the sixth embodiment of the present invention.

15 is a cross-sectional view of the coil winding die of FIG.

FIG. 16 is a cross-sectional view showing a detached state of a coil in a coil winding form according to embodiment 6 of the present invention.

FIG. 17 is a plan view showing a wound state of the coil in the coil winding die according to the seventh embodiment of the present invention.

18 is a cross-sectional view of the coil winding die of FIG.

FIG. 19 is a cross-sectional view showing a detached state of a coil in a coil winding form according to embodiment 7 of the present invention.

FIG. 20 is a plan view showing a wound state of the coil in the coil winding die according to the eighth embodiment of the present invention.

FIG. 21 is a cross-sectional view of the coil winding die of FIG. 20.

FIG. 22 is a cross-sectional view showing a detached state of the coil in the coil winding die according to Embodiment 8 of the present invention.

FIG. 23 is a plan view showing a wound state of the coil in the coil winding die according to the ninth embodiment of the present invention.

FIG. 24 is a cross-sectional view of the coil winding die of FIG. 23.

FIG. 25 is a cross-sectional view showing a detached state of the coil in the coil winding form according to the ninth embodiment of the present invention.

FIG. 26 is a plan view showing a coil winding die according to Embodiment 10 of the present invention.

FIG. 27 is a cross-sectional view showing a coil winding die according to Embodiment 10 of the present invention.

FIG. 28 is a plan view showing a coil winding die according to Embodiment 11 of the present invention.

FIG. 29 is a cross-sectional view showing a coil winding die according to Embodiment 11 of the present invention.

FIG. 30 is a plan view showing a coil former according to embodiment 12 of the present invention.

FIG. 31 is a cross-sectional view showing a coil winding die according to Embodiment 12 of the present invention.

FIG. 32 is a plan view showing a coil former according to embodiment 13 of the present invention.

FIG. 33 is a sectional view showing a coil former according to embodiment 13 of the present invention.

FIG. 34 is a plan view showing a conventional coil former.

FIG. 35 is a cross-sectional view taken along line XXXV-XXXV of the related art.

[Explanation of reference numerals] 1 fixed type, 1a horizontal surface, 1b inclined surface, 1c cutout portion, 2 movable type, 2a inclined surface (sliding surface), 3
Spacer (distance changing means), 4 tightening bolts (fixing means), 11 clearance adjusting screws (distance changing means), 12 slide grooves (recesses), 13 guides (convex parts), 15 compression springs (elastic means), 17 engagements Combined, 19 compression spring (elastic means), 21 scribing needle (scribing means), 23 spring pressure adjusting screw (elastic force adjusting means), 24 fixing groove, 25 convex portion, 26 ridge.

Claims (10)

[Claims] 1. A coil former for winding a wire around an outer peripheral surface to form a coil, wherein an outer peripheral surface substantially orthogonal to the horizontal surface is formed by a notch formed by a horizontal surface and an inclined surface intersecting the horizontal surface at an obtuse angle. A fixed die in which a part of the winding surface of the wire formed in is cut out, and a slide surface that engages with the inclined surface of the fixed die, and the slide surface extends along the inclined surface of the fixed die. A movable die that is slidably fitted into the cutout portion of the fixed die, is integrated with the fixed die, and forms a winding surface of the wire on an outer peripheral surface substantially orthogonal to a horizontal plane of the fixed die; It has a distance changing means that can change the distance between the horizontal surface of the fixed die and the movable die, and a fixing means that pressurizes and fixes the movable die to the horizontal surface side of the fixed die. Winding form for coil 2. The coil winding according to claim 1, wherein the distance changing means is composed of a gap adjusting screw screwed so as to project from the back surface of the fixed die to the horizontal surface side of the cutout portion. Type. 3. A concave portion extending in the sliding direction on one of a fixed-type inclined surface and a movable-type sliding surface, and on the other of the fixed-type inclined surface and the movable-type sliding surface. A convex portion, and the concave portion and the convex portion are fitted to each other so that the movable die slides in the sliding direction without separating the movable die slide surface from the fixed die inclined surface. The winding form for a coil according to claim 1, wherein 4. A coil according to claim 1, wherein an elastic means for acting to separate the movable die from the horizontal surface of the fixed die is mounted between the fixed die horizontal surface side and the movable die. Winding type. 5. The fixing means is composed of a tightening bolt that penetrates the movable mold and is screwed into the fixed mold, and the tightening bolt engages with the movable mold to tighten the movable mold. The winding form for a coil according to claim 1, further comprising an engaging body attached to move the bolt in the advancing / retreating direction. 6. An inscribing means for a coil, which protrudes toward the winding surface side of the wire through elastic means, is provided on the inner side of the movable die near the horizontal surface of the fixed die. And the coil winding die according to claim 3. 7. The coil winding die according to claim 6, wherein elastic force adjusting means for advancing and retracting the elastic means with respect to the winding surface of the wire rod of the movable die is mounted in the movable die. 8. A fixed groove is formed on the movable mold so as to be orthogonal to the horizontal surface of the fixed mold and extends toward the horizontal surface, and the fixed groove is inserted into the fixed groove on the horizontal surface of the fixed mold. The convex portion for pressurizing and holding the winding start end portion of the wire is formed between the groove and the inner surface side of the groove.
Winding form for the described coil. 9. The pressing surface at the winding start end of the wire formed by the inner surface of the fixing groove and the convex portion is configured to form an obtuse angle with the winding direction of the wire on the winding surface of the wire. The winding form for coils according to item 8. 10. A ridge for forming a marking line at the winding start end of the wire is formed on either the inner surface of the fixing groove for pressing the winding start end of the wire or the surface of the convex portion. The winding form for coils according to claim 8.