JPH0335752Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a simple packaging structure for an electromagnetic steel plate slit coil.

(Prior Art) As is well known, for example, an electrically insulating film is formed on the surface of a grain-oriented electrical steel sheet. When shipping this unidirectional electrical steel sheet, it is slit according to the width required by the customer, and the slit coil is wound into a coil, packed in rust-proof paper, and the end faces are abutted to form a horizontal or vertical shape. Currently, the multilayer slit coils are layered in a mold, tightly wrapped with waterproof paper, metal plates, etc., and then bound with hoops or wooden frames before being shipped.

(Problems with the prior art) However, due to the so-called heavy packaging as described above, not only does the packaging work at the steel manufacturer require a great deal of cost, time, and labor, but also the unpacking work at the customer is difficult. The problem was that it required a lot of effort and time.

(Purpose of the invention) As a result of considering the reason why heavy packaging is necessary in the past, the inventors found that although the surface of the slit coil has a certain rust prevention function due to an insulating film, the slit end surface is bare. They have no rust-preventing function at all, and heavy packaging has conventionally been carried out primarily to prevent rust on the edges.

Therefore, this invention basically significantly simplifies the packaging structure by applying a rust-proof insulation coating to the end face of the slit coil, advantageously solving the conventional difficulties, and further improving the ability of the end face of the slit coil to be coated with an insulation coating. This allows the processing to be omitted.

(Structure and function of the invention) The rust-preventive insulating film applied to the end face of the slit coil by the above steel manufacturer prevents rust from being applied and until it is assembled into the transformer by the customer. This has the effect of preventing short circuits at the rear end face. Furthermore, the desirable functions that this rust-preventing insulating film should have are that the rust-preventing insulating film applied to the end face of the slit coil does not penetrate deep into the interlayers of the slit coil, and that the film does not penetrate deeply between the layers of the slit coil when the customer unwinds the slit coil. is separated from between each layer, and a film can be reliably present on the edge surface in a flat plate state. As a rust-preventing insulating film that satisfies such a function, for example, the one proposed in Japanese Patent Publication No. 52-13183 is suitable.

Examples will be described in detail below.

FIG. 1 is an overall external view of the packaging structure according to this invention, and FIG. 2 is a detailed cross-sectional view, and this example shows a horizontal packaging structure for slit coils.

In the drawings, 1a, 1b, and 1c are slit coils, and 2 is a surface insulation film. A rust-proof insulating film 3 is formed on the end faces of the slit coils 1a, 1b, 1c. 4 is each slit coil 1a, 1b, 1
The corrugated cardboard interposed between the end faces of c prevents damage to the rust-proof insulating film 3 due to contact between the end faces. Reference numeral 5 denotes a dowel applied to the edge portion of the multi-layer slit coil, and a cardboard 6 is also interposed below the dowel 5, and the same coating 3 is formed by contact between the dowel 5 and the rust-preventing insulating coating 3.
prevent damage. Reference numeral 7 denotes a hoop provided on the support 5 to bind the multilayer slit coils. Note that 8 indicates a label.

The structure of the embodiment of this invention is as described above, and provides the following effects.

Since a rust-preventive insulating film 3 is formed on the end face of each slit coil 1a, 1b, 1c, the presence of the surface insulating film 2 in the slit coil 1a, 1b, 1c, together with the presence of the surface insulating film 2, effectively prevents rust on the entire slit coil 1a, 1b, 1c. It is possible to completely eliminate the use of waterproof paper, metal plates, etc., which are necessary in conventional packaging. This makes it possible to reduce packaging costs and streamline unpacking work by significantly reducing labor.

Furthermore, since the cardboard boxes 4 and 6 are interposed between the end faces of the slit coil and under the dowel 5, the rust-proof insulating film 3 is not damaged during transportation of the packaged product, and the film 3 is used as the end face insulator at the customer. It can be used as a film and eliminates the need for end-face rust prevention treatment at the customer's end.

Although the above embodiment shows the packing structure of horizontal multi-layered slit coils, it goes without saying that the present invention can also be applied to the case of vertical multi-layered coils, and can also be implemented in the same way for packing non-oriented electromagnetic steel slit coils. Needless to say.

(Effects of the invention) As detailed above, the packaging structure of this invention has the extremely large effect of streamlining the packing work for electromagnetic steel slit coils and omitting end-face rust prevention treatment at the customer. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is an overall external view of the packaging structure, and FIG. 2 is a detailed sectional view. 1a, 1b, 1c...slit coil, 2...
Surface insulating film, 3... End face rust-proofing insulating film, 4,
6...Cardboard, 5...Cash, 7...Hoop.

Claims (1)

[Scope of utility model registration request] A rust-preventing insulating film is formed on the end face of an electromagnetic steel plate slit coil having an insulating film on the surface, and a plurality of slit coils are layered with an end face contact prevention material interposed between the end faces of the slit coil, and the edge portion of the multilayer slit coil is A packing structure for electromagnetic steel sheet slit coils, in which a contact prevention material and a stopper are brought into contact and tied together with a hoop from above.