JPH09320881A - Clamper device of wire rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamper device of a wire rod, capable of dissolving unbalance in rotation and preventing trasformation of the wire rod. SOLUTION: A clamper device 10 of this wire rod clamps a part of a wire rod W by coupling a clamping insertion member 33 with a winding member 12 for winding the wire rod W. The winding member 12 for winding the wire rod W is provided in a substantial center part region of an end part of the winding member 12, and has a recess part 13 for clamping a part of the wire rod W by inserting the insertion member 33 and a groove part 14 formed relating to this recess part 13 for inserting a part of the wire rod W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a wire rod clamping device for clamping an end portion of a wire rod when forming an air core coil (also referred to as a bobbinless coil) used as an electronic component. It is about.

[0002]

2. Description of the Related Art FIG. 9 shows a part of an apparatus for winding an air-core coil. The air core coil is used as an electronic component for an electronic circuit. A wire is used to wind such a coil, but the winding cannot be started without first clamping the end of the wire. Therefore, the end portion of the wire is clamped by using the clamp portion 1 as shown in FIG. In FIG. 9, the clamp portion 1 is provided on the member 2 side, and the member 2 faces the member 3. A groove 4 is formed on the circular end surface of the member 2. The wire W is fitted in the groove 4, and the end 5 of the wire W can be detachably fixed by the force of the spring 6 of the clamp part 1.

[0003]

However, in the apparatus having such a structure, the member 2 including the clamp portion 1 is wound integrally with the member 3 while winding the wire W while rotating the member 3 around the shaft as a coil. To form
The clamp portion 1 is provided so as to project to the side of the member 2, and since the clamp portion 1 is large, a large rotational imbalance occurs in the rotation system of the members 2 and 3.
Therefore, the life of the bearing (not shown) is shortened.

When the wire W is a rectangular wire having a rectangular cross section when viewed in cross section, when the wire W of the rectangular wire is fitted into the groove 4 so as to escape, the curvature of the wire W becomes large in the longitudinal direction. Because of the difference, the wire W is deformed such as twisted. From this, there is a problem in that the dimensional accuracy of the outer shape of the air-core coil is deteriorated. That is, since the rectangular wire W is fitted into the groove 4 along the axial direction of the member 2, the portion Wa located on the end face 2a of the member 2 and the portion Wb of the wire W that has entered the groove 4 are This is because twisting occurs in the longitudinal direction. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems, to provide a wire rod clamping device capable of eliminating rotation imbalance and preventing deformation of the wire rod.

[0005]

According to the present invention, there is provided a clamping device for clamping an end portion of a wire rod when the wire rod is wound to form an air-core coil by rotating. A wire rod clamping device that clamps a part of a wire rod by connecting an insert member for clamping and a winding member for winding the wire rod, and the winding member for winding the wire rod is approximately at the center of the end portion of the winding member. The present invention is achieved by a wire rod clamping device that has a concave portion that is provided in the partial region and that clamps a portion of the wire rod by inserting the insertion member, and a groove portion that is formed in association with the concave portion and that fits a portion of the wire rod. It

In the present invention, in order to clamp a part of the wire rod, the clamp insertion member is connected to the winding member for winding the wire rod. The concave portion of the winding member is a portion that clamps a part of the wire rod by inserting the insertion member. The groove is formed in relation to this recess, and a part of the wire can be fitted therein. By doing so, part of the wire can be clamped in the recess of the winding member, and at the time of clamping, part of the coil can be fitted in the groove provided in relation to the recess, and the recess and the groove are wound. Since the member is located substantially in the central region of the end face, the rotation balance is good and the life of the rotating system is not affected when the wire rod is wound to form the coil of the air core. Further, since the groove portion of the winding member is located at substantially the same position as the winding surrounding portion of the winding member in the axial direction, even if the wire rod is a rectangular wire, deformation such as twisting in the axial direction occurs in the clamped wire rod. Does not occur,
The outer dimensional accuracy of the formed coil can be maintained.

[0007]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limitations are given, the scope of the present invention is not limited to these modes unless otherwise specified to limit the present invention.

Embodiment 1 FIG. 1 shows a coil forming device 20 including a wire rod clamping device 10 of the present invention, and FIG. 2 is a perspective view of the coil forming device. 1 and 2, the coil forming device 20 includes a wire rod clamping device 10, a bearing portion 40, and a rotating portion 60. First, the side plate 11 of the wire rod clamping device 10 rotatably holds the winding frame 12 as a winding member. The side plate 11 is a disc-shaped plate, and the winding frame 12 is fitted in the center hole 11a thereof. The reel 12 is
The recess 13 is provided. The recess 13 is a tapered hole whose outer end face has a large diameter and becomes narrower toward the inside. As shown in FIGS. 4 and 5, a groove portion 14 is formed in relation to the concave portion 13 of the winding frame 12. The groove portion 14 is formed at a position displaced by D from the position of the diameter of the winding frame 12. The outer peripheral surface of the winding frame 12 is a winding peripheral portion 15 for winding an air-core type coil. Further, one end portion of the groove portion 14 is a sharp edge 16 which is a cutting means for cutting the wire W.

The winding frame 12 is formed integrally with a shaft portion 61 of a rotating portion 60, and this shaft portion 61 is rotatably connected to a motor 62 as a driving means via a member 63. ing. The shaft 61 is urged in the casing 64 by a compression spring 65 in the arrow X1 direction. Therefore, the flange 66 of the shaft portion 61 is constantly pressed against the inner surface of the side plate 11. The other side plate 31 of the wire rod clamping device 10 is fixed to the casing 32, and the side plate 31 is a disc-shaped plate. A clamp pin 33, which is an insertion member for clamping, passes through the center hole 31a of the side plate 31. The tip of the clamp pin 33 is sharp, and the flange 34 of the clamp pin 33 has a compression spring 35.
Is always pressed against the inner surface of the side plate 31.

The casing 32 is rotatably supported by the bearings 41, 41 of the bearing portion 40. The bearing unit 40 can move the casing 32 and the bearing unit 40 along the direction of the arrow X2 by the cylinder 42, and can contract and return in the direction of the arrow X1. The wire W used in FIGS. 1 and 2 is a so-called rectangular wire, and its cross section is a rectangular cross section. The air-core coil formed on the rectangular wire W is a coil used for brushless motor DC and AC flat motors, for example.

Next, an operation example of the coil forming device 20 and the wire clamp device 10 described above will be described with reference to FIGS. First, as shown in FIG. 1, the side plate 11 and the side plate 31 are
It is located at a remote location. In this state, as shown in FIG. 2, the rectangular wire W is fitted into the groove 14 of the winding frame 12. Therefore, the wire W is positioned so as to cross the winding frame 12 in the central region of the side plate 11. Wire W
After being fitted into the grooves 14 in this way, the cylinder 42 of FIG. 1 operates and the clamp pin 33 moves in the X2 direction, so that the clamp pin 33 of the winding frame 12 is moved as shown in FIG. It completely fits into the recess 13. In this state, the wire W is firmly sandwiched and held between the peripheral surface of the clamp pin 33 and the inner peripheral surface of the recess 13. The force applied when the clamp pin 33 fits into the recess 13 of the winding frame 12 can be adjusted appropriately by the compression springs 35 and 65.

After that, in the excess top lead portion 100 of the wire W in FIG. 2, for example, a worker pulls up in the S direction in FIG.
00 can be cut.

Next, the motor 62 is operated to rotate the rotating portion 60.
The shaft portion 61 of the side plate 11 and the casing 6 together with the bobbin 12.
By rotating with respect to 4, the wire W is wound around the peripheral portion 15
Will be rolled in the required number of times. When this winding operation is completed, the operation of the motor 62 is stopped and the cylinder 42
Is contracted, the clamp pin 33 separates from the recess 13 and returns to the state of FIG. As a result, the clamped state of the wire rod W by the clamp pin 33 and the recess 13 is released, and thus the coil formed by winding can be easily removed from the winding frame 12.

The embodiments shown in FIGS. 1 to 5 have the following advantages. Clamp pin 33 and recess 1 of reel 12
Since the clamp mechanism portion composed of 3 is located at the center of rotation, the rotation balance is good, and when the wire W is wound to form a coil, vibration of the rotation system can be reduced, System life, especially bearing 41 in FIG.
Life can be extended. Further, since the rotation balance is good, the wire W can be wound at high speed to form a coil.

The wire W which is a rectangular wire as shown in FIG.
It is fitted in the groove 14 and the reel 12
Since the winding surrounding portion 15 is located at the same position (concentric circle) in the axial direction, even when the wire W is clamped,
In addition, it is possible to prevent the wire rod from being deformed such as twisted without applying unnecessary large force. From this, the shape accuracy of the coil formed by winding can be improved. Also, to clamp the wire W, the clamp pin 33
Since it is only necessary to fit the recess 13 of the winding frame 12 to each other, the mechanism is simple and failure is unlikely to occur.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment differs from the embodiments shown in FIGS. 1 to 5 in that the shape of the winding frame 112 and the clamp pin 13 are different.
3 shape. The reason why the shapes of the winding frame 112 and the clamp pin 133 are different from each other is that the wire rod W has a circular cross section as shown in FIG. Therefore, the points of difference between the second embodiment shown in FIGS. 6 to 8 and the first embodiment shown in FIGS. 1 to 5 will be described. It is the same.

The winding frame 112, which is fitted in the center hole 11a of the side plate 11, has a groove 114 and a recess 113. The recess 113 is not a tapered hole but a hole having a circular cross section and having the same diameter. The groove 114 is formed in the diameter portion of the recess 113 or in a portion slightly deviated from the diameter portion. On the other hand, the clamp pin 1 on the side plate 131 side
33 is a columnar or cylindrical pin,
It is adapted to fit in the second recess 113. That is, the outer circumference of the clamp pin 133 and the inner circumference of the recess 113 can clamp the wire W1. A sharp edge 116 as a cutting means is formed at one end of the groove 114. This edge 116 is the top lead portion 11 of the wire W1 in FIG.
It is a part that can be cut by pulling 0 in the S direction.

Also in the second embodiment of the present invention, the wire W
Reference numeral 1 denotes a groove portion 11 of the winding frame 112 located at the center of rotation.
Since it can be clamped corresponding to 4, the rotation balance is improved, vibration of the rotating system can be reduced when winding the wire to form the coil, and the life of the rotating system, particularly the bearing 41, can be extended. Since the rotation balance is good, high-speed winding is possible. Further, the wire rod W1 can be easily clamped by simply inserting the cylindrical or columnar clamp pin 133 into the recess 113 of the winding frame 112, so that the clamp mechanism is simple. When a coil is formed by winding the wire W1 having a circular cross section, this coil can be used in the fields of brushless motor DC and AC flat motors and choke coils, for example.

The present invention is not limited to the above embodiment. In the above-mentioned embodiment, the wire rods W and W1 for forming a coil used in, for example, an electronic component are taken as an example, but the clamp device of the present invention can be applied to the case of forming a coil in another field. .

[0020]

As described above, according to the present invention,
It is possible to eliminate unbalance of rotation and prevent deformation of the wire rod.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first preferred embodiment of a coil forming device including a wire rod clamping device of the present invention.

FIG. 2 is a perspective view showing a coil forming device including the clamp device of FIG.

FIG. 3 is a diagram showing a state in which a wire rod is clamped.

FIG. 4 is a front view showing the vicinity of the reel of FIG. 1 as viewed from the axial direction.

FIG. 5 is a diagram showing a manner of cutting a top lead portion of a wire rod.

FIG. 6 is a sectional view showing a coil forming device including another embodiment 2 of the wire rod clamping device of the present invention.

FIG. 7 is a perspective view showing a coil forming device including the wire rod clamping device of FIG. 6;

FIG. 8 is a diagram showing a state in which a clamp device clamps a wire rod.

FIG. 9 is a perspective view showing a conventional wire clamp device.

[Explanation of symbols]

10 ... Wire clamp device, 12 ... Reel (winding member), 13 ... Recess, 14 ... Groove, 15 ...
Winding peripheral portion, 20 ... Coil forming device, 33 ...
Clamp pin (insert member), W, W1 ... Wire rod

Claims (6)

[Claims] 1. A clamp device for clamping an end portion of a wire rod when the wire rod is rolled to form an air-core coil by rotating the insert member for clamping and a winding member for winding the wire rod. A wire rod clamping device that clamps a part of a wire rod by connecting the wire rod. A winding member for winding the wire rod is provided in a substantially central region of an end portion of the winding member, and an insertion member is inserted to insert the wire rod. A wire rod clamping device comprising: a concave portion for clamping a portion; and a groove portion formed in relation to the concave portion for fitting a part of the wire rod. 2. The wire rod clamping device according to claim 1, wherein the groove portion of the winding member is located substantially at the same position as the winding peripheral portion of the winding member in the axial direction. 3. The wire rod clamping device according to claim 1, wherein the clamp insertion member linearly moves toward the winding member when it is fitted into the recess of the winding member for winding the coil. 4. When the wire rod has a rectangular cross section, the inner diameter becomes smaller as it goes inward from the opening end side of the recess, and the insertion member is sharpened corresponding to the shape of the recess. Clamping device for the wire described. 5. When the wire rod has a circular cross-section, the inner diameter of the recess is constant as it goes inward from the opening end side of the recess,
The insertion member has a cylindrical shape corresponding to the shape of the recess.
The wire rod clamping device described in. 6. The wire rod clamping device according to claim 1, wherein the winding member is provided with cutting means for cutting an excessively clamped portion of the wire rod.