JPS6357934B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a capacitor composed of a double-sided metallized film and a laminated film, and a method for winding the capacitor.

Conventional Structure and Problems Conventionally, when manufacturing a wound type metallized film capacitor, as shown in Fig. 1, a double-sided metallized film 1 and a laminated film 2 are sandwiched between a winding shaft 3 and wound. Then, a cylindrical capacitor element 4 as shown in FIG.
After the obtained material is obtained, the element is constructed by forming it into a flat shape by heating and pressurizing as shown in FIG. A minute gap 7 may be formed due to variations in pressure, and in the subsequent metal spraying process, the end face 8 of the capacitor element 4 may be formed.
The metallicon particles that are blown away from the gap 7 enter the gap 7, and because the double-sided metallized film 1 faces the gap 7, the dielectric loss tangent and insulation resistance deteriorate.

As a solution to this problem, as shown in FIG. 4, only the non-metalized film 9 is wound around the winding shaft 3 an arbitrary number of times (hereinafter referred to as the first winding), and then the double-sided metalized film 1 and the laminated film 2 are simultaneously wound. By turning the fifth
As shown in the figure, a method has been used in which the double-sided metallized film 1 is wound using a first winding section 10 so that the double-sided metallized film 1 is not present in the flattened portion 6 of the hole 5 from which the winding shaft has been removed.

However, in this method, it is necessary to wind the non-metalized film 9, which is different from the matching film 2, around the tip 10, so the mechanism of the device that continuously and automatically winds the capacitor becomes very complicated. This method has the drawbacks of high equipment cost and low productivity compared to the structure shown in FIG. 1, which has been a major obstacle in the production of capacitors.

OBJECTS OF THE INVENTION The present invention solves these conventional drawbacks, and aims to eliminate deterioration of dielectric loss tangent and insulation resistance, and to enable high productivity and low cost manufacturing.

Structure of the Invention In order to achieve this object, the present invention includes the following steps:
The center of the capacitor element is made of only a laminated film.

Further, in the present invention, when the double-sided metallized film and the laminated film drawn out from the reel are sandwiched between the winding shafts and the winding shaft is rotated to wind the double-sided metalized film and the laminated film, first, the double-sided metallized film and the laminated film are Lift up the part between the reel and the winding shaft of the double-sided metallized film and remove the tip of the double-sided metallized film from the winding shaft.
After rotating the winding shaft in this state and winding only the laminated film, the lifted state of the double-sided metalized film is released, and the friction between the double-sided metalized film and the laminated film causes the double-sided metalized film to be wound onto the winding shaft. This is a method in which a double-sided metallized film and a laminated film are overlapped and wound.

DESCRIPTION OF EMBODIMENTS Figures 6 to 12 show one embodiment of the present invention.
This will be explained using the drawings of the figures.

FIG. 6 is a diagram showing the basics of the present invention.
As shown in the figure, at the beginning of winding, the double-sided metallized film 1 is removed from the winding shaft 3 and kept separate from the winding shaft 3, and after winding only the laminated film 2 with the winding shaft 3 an arbitrary number of turns, Following the movement of the laminated film 2, the double-sided metallized film 1 is advanced in the direction of the winding shaft 3 and is wound together with the laminated film 2, so that the center of the capacitor element is aligned. Film only.

FIG. 7 shows the configuration of a capacitor winding device for carrying out the winding method according to an embodiment of the present invention. In FIG. This is a reel on which a film 2 is wound, and by rotating it between the winding shafts 3 and 3', tension is applied to the double-sided metallized film 1 and the laminated film 2, and the reel 11, 1
2 rotates, whereby the double-sided metallized film 1
and laminated film 2 are supplied. Reference numeral 13 denotes a film shifting device, which lifts the double-sided metallized film 1 upward by moving upward, and then returns to its original position, thereby causing slack in the double-sided metalized film 1. When the double-sided metallized film 1 and the laminated film 2 are wound simultaneously, they act as guide rollers. 14, 14' are film holding devices;
The film holding devices 14 and 14' are used to sandwich the double-sided metallized film 1 therebetween to prevent tension from being applied to the reel 11 winding the double-sided metalized film 1.
This is to prevent the reel 11 on which the double-sided metallized film 1 is wound from rotating when the double-sided metallized film 1 is lifted up by the double-sided metallized film 1. 15 is a guide roller. Further, 16 is a capacitor winding.

The operation of the capacitor winding device configured as described above will be explained using the drawings of FIGS. 8 to 12.

First, in FIG. 8, the winding shaft 3' moves to the position B after overlapping and winding the double-sided metallized film 1 and the laminated film 2 at the position A, and at the same time the winding shaft 3 is at the position A. sandwich the double-sided metallized film 1 and the laminated film 2, and then the film holding device 14
was lowered and the double-sided metalized film 1 was sandwiched and fixed between the film holding device 14', and then the double-sided metalized film 1 was cut at the position C between one winding shaft 3 and the other winding shaft 3'. It is a figure showing a state.

Then, from the state shown in FIG. 8, by moving the film shifting device 13 upward and lifting the double-sided metallized film 1, the tip 1a of the double-sided metalized film 1 is brought into contact with the laminated film 2. It moves toward the reel 11 on which the double-sided metallized film 1 is wound, passes between the winding shafts 3, and then stops at a position close to the winding shaft 3 in a state where it contacts the laminated film 2. FIG. 9 shows this state.

After the state shown in FIG. 9, the winding shaft 3' winds only the laminated film 2 an arbitrary number of times, and at the same time, the laminated film 2 is cut between the winding shaft 3 and the winding shaft 3'. winds only the laminated film 2. FIG. 10 shows this state. During this time, the capacitor winding 16 wound on the winding shaft 3' is removed from the winding shaft 3', and the double-sided metallized film 1 is removed from the winding shaft 3'.
is fixed by the film holding devices 14, 14', so that the tip 1a of the double-sided metallized film 1
The laminated film 2 traveling on the winding shaft 3 due to frictional force
Even if an attempt is made to carry it in this direction, it is not carried, and the leading end 1a of the double-sided metallized film 1 is stopped on top of the traveling laminated film 2.

After the state shown in FIG. 10, when the winding shaft 3 has wound the laminated film 2 an arbitrary number of times, the film shifting device 13 is lowered and returned to its original position. The double-sided metallized film 1 is inserted between the tip 1a of the metallized film 1
A slack 1b is generated in the double-sided metallized film 1, and the tip 1a of the double-sided metallized film 1 is carried by the traveling laminated film 2, moves toward the winding shaft 3, and travels with the laminated film 2 wound around the winding shaft 3. It is sandwiched between the laminated film 2 and the laminated film 2. FIG. 11 shows this state. Note that the film shifting device 13 is not limited to a roller, but may be any device capable of lifting the double-sided metallized film 1.

Then, from the state shown in FIG. 11, the film holding device 14 returns to its original position above and tension is applied to the double-sided metallized film 1, so that the double-sided metalized film 1 and the laminated film 2 are overlapped. It will be rolled. FIG. 12 shows this state.

Here, even if the film shifting device 13 and the film pressing device 14 return to their original positions at the same time, the winding device operates without any problem.

By repeating the above series of operations, it is possible to continuously and automatically manufacture capacitors in which the laminated film 2 is wound first.

Effects of the Invention As described above, the capacitor and its winding method of the present invention are capable of attaching a film holding device and a film shifting device without significantly changing the conventional capacitor winding device without first winding, which is highly productive. In addition, productivity can be dramatically improved compared to the conventional first-winding capacitor winding method, and the capacitor has the same characteristics as the conventional first-winding capacitor. This makes it possible to manufacture capacitors with excellent characteristics at low cost.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram showing the state when winding a conventional capacitor without a first winding, Figure 2 is a perspective view showing the capacitor element after winding of the capacitor without a leading winding, and Figure 3 is a A perspective view showing the capacitor element in a flat state, Fig. 4 is a schematic configuration diagram showing the state when winding a conventional capacitor that performs first winding, and Fig. 5 shows the element of the capacitor that performs first winding. FIG. 6 is a perspective view showing a capacitor according to the present invention in a flat state, FIG. 6 is a schematic configuration diagram showing a state in which the capacitor is wound, and FIGS. 7 to 12 are diagrams showing a capacitor according to an embodiment of the present invention. 1 is a schematic configuration diagram for explaining a winding device that implements a winding method and its operation; FIG. 1... Double-sided metallized film, 2... Combined film, 3, 3'... Winding shaft, 11, 12... Reel,
13...Film shifting device, 16...Capacitor winding.

Claims (1)

[Scope of Claims] 1. A capacitor in which a capacitor element is constructed by overlapping and winding a double-sided metallized film and a laminated film, and in which the center portion of the capacitor element is only the laminated film. 2. When the double-sided metallized film and the laminated film drawn out from the reel are sandwiched between the winding shafts and the winding shaft is rotated to wind the double-sided metalized film and the laminated film, the reel and the laminated film of the double-sided metalized film are first Remove the tip of the double-sided metallized film from the winding shaft by lifting the part between it and the winding shaft, then rotate the winding shaft in this state to wind only the combined film, and then release the lifted state of the double-sided metalized film. A capacitor winding method characterized in that the double-sided metallized film is wound around the winding shaft by friction between the double-sided metalized film and the laminated film, and the double-sided metalized film and the laminated film are overlapped and wound.