JPH046186Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a laminated core temporary fixing device suitable for use in transformers such as transformers and chiyoke coils.

[Prior art and its problems]

Conventionally, in the production of transformers (transformers, chi-yoke coils, etc.) using laminated cores, an automatic insertion machine inserts E-type and I-type silicon steel plates (magnetic plates) one by one into the coil bobbin around which the coil is wound. At the same time, in order to prevent the assembled silicon steel plates, especially the I-shaped silicon steel plates, from falling off, adhesive tape was manually wrapped around the outer circumferential surface of the laminated cores. Attach and temporarily fix it.
Thereafter, a moisture-proof, insulating, and fixing varnish was applied to the surface of the laminated core.

However, since such a manufacturing process includes a manual taping process, it is difficult to fully automate the manufacturing process, and there are also problems in that assembly is poor, and manufacturing man-hours and manufacturing costs are significantly increased. Furthermore, since the magnetic plates do not adhere completely in the stacking direction, there is a problem in that the magnetic properties are deteriorated, electrical performance is deteriorated and variations are caused, and the yield is deteriorated.

[Means for solving problems]

The object of the present invention is to provide a temporary fixing device for laminated cores that solves the problems existing in the prior art described above, and is achieved by a temporary fixing device 1 shown below.

That is, the temporary fixing device 1 for a laminated core according to the present invention includes a laminated core 4 and a coil 5 in which a plurality of magnetic plates 3 are stacked.
It is applied to transformers such as a transformer T equipped with
An elastic piece 8 is provided with one end 8c rotatably attached and the other end being a free end 8f, and the free end 8
A stopper 10 is provided which has a plurality of locking teeth 9 capable of locking f, and when the free end 8f locks with any locking tooth 9, the intermediate portion 8m of the elastic piece 8 holds the laminated core 4. It is characterized by being configured so that it can be pressed in the stacking direction H.

[Effect]

Next, the operation of the present invention will be explained.

According to the temporary fixing device 1 according to the present invention, one end 8c
The free end 8f of the elastic piece 8 is regulated by the stopper 1
0, the intermediate portion 8m of the elastic piece 8 presses the laminated core 4 to apply a pressing force in the lamination direction H. As a result,
The magnetic plates 3 are prevented from falling off due to the friction between their contact surfaces.

On the other hand, the electrical performance of transformers is...
Variations occur due to differences in the degree of abutting and the pressing force in the stacking direction H. Therefore, in the temporary fixing device 1 according to the present invention, by arbitrarily selecting the locking position of the free end 8f with respect to the locking teeth 9...
The pressing force applied to the laminated core 4 by the intermediate portion 8m can be adjusted, and electrical performance can be made uniform.

〔Example〕

Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

First, the configuration of a transformer equipped with a temporary fixing device will be explained with reference to FIG.

In FIG. 1, T is an external iron type transformer. The transformer T includes a laminated core 4, and a synthetic resin coil bobbin 6 having a coil 5 wound around its outer periphery is attached to the central core portion. Laminated core 4 is magnetic plate 3
..., this magnetic plate 3 ... is an E-shaped silicon steel plate 1
1... and I-shaped silicon steel plates 12... On the other hand, the coil bobbin 6 is integrally provided with connection terminals 13 for connecting the ends of the coil 5. Also,
A coil cover 7 is disposed on the outside of the coil 5, and a temporary fixing device 1 for the laminated cores is provided on side surfaces 7p and 7q of the coil cover 7 parallel to the lamination direction H of the laminated cores 4 according to the present invention.

Next, the configuration of the temporary fixing device 1 will be specifically explained with reference to FIG. 2.

First, on one side 7p,
A mounting pin 8s having a circular cross section is provided. A bearing hole 8i formed at one end 8c of the elastic piece 8 made of synthetic resin is rotatably attached to the mounting pin 8s. The elastic piece 8 is formed into an elongated linear shape, and the other end is formed into a pointed shape to form a free end 8f. On the other hand, on the other side of the side surface 7p, there are a plurality of sawtooth-shaped locking teeth 9 that lock the free end 8f so that it does not move back.
A stopper 10 having... is provided. In addition, the second
As shown by the imaginary line in the figure, the length from one end 8c of the elastic piece 8 to the free end 8f is selected to be longer than the distance from the one end 8c to the stopper 10. Note that an elastic piece 8 and a stopper 10 are similarly provided on the other side surface 7q.

Next, a method for manufacturing the transformer T including the function of the temporary fixing device 1 will be explained.

First, when automatically assembling the laminated core 4, E-shaped silicon steel plates 11 and I-shaped silicon steel plates 12 are alternately inserted into the coil bobbin 6 and laminated one after another. After the assembly by automatic insertion or, if necessary, by manual assembly of the silicon steel plates 11 and 12, the pressing piston 15 is moved forward relative to the elastic piece 8, as shown in FIG. and gradually push the intermediate portion 8m in the stacking direction (arrow H direction). As a result, the free end 8f of the elastic piece 8 is sequentially locked with the locking teeth 9..., and the middle part 8m of the elastic piece 8 is locked.
deforms in a buckling manner, as shown by the solid line. As a result, the outer surface of the laminated core 4 is pressed in the lamination direction, and the silicon steel plates 11 and 12 are prevented from falling off.

On the other hand, an instrument for measuring electrical performance is connected to the transformer T, and the measurement value of the instrument as the pressing piston 15 moves forward and the elastic piece 8 is pushed is monitored. Then, when the measured value reaches an appropriate value (standard value), the forward movement of the pressing piston 15 is stopped. As a result, the electrical performance of the transformer T, which varies due to differences in the degree of butting of the magnetic plates 3 and differences in the pressing force in the stacking direction, is made uniform. That is,
Depending on the locking position of the free end 8f with respect to the plurality of locking teeth 9, the pressing force applied by the intermediate portion 8m to the laminated core 4 in the stacking direction can be varied. performance can be made uniform. Therefore, since the laminated core 4 can be temporarily fixed in this state, it can be permanently fixed by performing varnish treatment, and a transformer T of uniform quality can be obtained, and the yield of the product can be greatly improved.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments. For example, although the case where the elastic member is provided on the coil cover is shown, it can be similarly provided on other structural members such as the coil bobbin. Further, the elastic member may be made of synthetic resin or a metal material such as a leaf spring. Furthermore, the term "transformers" can be applied to not only the illustrated transformers but also any other transformers such as a chiyoke coil, and electromagnetic equipment in a broad sense. In addition, the detailed configuration, shape, quantity, material, etc. may be arbitrarily changed without departing from the gist of the present invention.

[Effect of idea]

As described above, the laminated core temporary fixing device according to the present invention has one end rotatably attached to a component integrally provided with the coil, such as a coil bobbin or a coil cover, and the other end is a free end. In addition to providing an elastic piece, a stopper having a plurality of locking teeth capable of locking the free end is provided, and when the free end locks with any locking tooth, the laminated core is held by the middle part of the elastic piece. Because it is configured so that it can be pressed in the stacking direction,
Obtain the following effects:

Since it becomes possible to fully automate the manufacturing process of transformers, including performance uniformity, it is possible to increase product yields and significantly reduce manufacturing costs.

Because the magnetic plates of the laminated core are completely adhered in the lamination direction, and the degree of adhesion can be adjusted,
Temporary fixation can be performed with uniform electrical performance, uniform quality and improved magnetic properties (reduced iron loss and excitation current).

[Brief explanation of the drawing]

Fig. 1: A perspective view of a transformer equipped with a temporary fixing device according to the present invention, and Fig. 2: A front view of the temporary fixing device. In the drawings, 1...temporary fixing device, 3...magnetic plate,
4... Laminated core, 5... Coil, 6... Coil bobbin, 7... Coil cover, 8... Elastic piece, 8c
... Fixed end, 8f ... Free end, 9 ... Locking tooth, 1
0...Stoppa, T...Trance.

Claims (1)

[Scope of utility model registration request] Transformers equipped with a laminated core made of multiple magnetic plates and a coil, one end of which is rotatably attached to a component integrally provided with the coil, such as a coil bobbin or a coil cover, and the other end. In addition to providing an elastic piece with a free end, a stopper having a plurality of locking teeth that can lock the free end is provided, and when the free end locks with any locking tooth, the middle part of the elastic piece A temporary fixing device for laminated cores, characterized in that the laminated cores are configured to be pressable in the lamination direction.