JPS6220686B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a capacitor winding device for manufacturing wound capacitors.

A conventional winding device uses two metal foils 10a, 10b and two dielectric films 12 as shown in FIG.
When the metal foils a and 12b are alternately stacked and wound around the winding core 20, these metal foils and dielectric films are passed between a pair of releasable rolls 22 and 22'. Further, cutting devices 30a, 3 are provided for each metal foil at a position in front of the roller.
0b also operated at the same time. Therefore, the two rolled up metal foils face each other over the entire area, and due to the structure of the device, there is a lower limit to the length of the rolled up metal foil, that is, the electrode area, so it is impossible to manufacture a capacitor with a small capacity. It was possible.

The present invention makes it possible to wind up two pieces of metal foil in such a manner that the two pieces of metal foil do not face each other over their entire area, and as a result, manufacturing of small capacitance capacitors becomes easier.

The configuration of the present invention will be explained with reference to FIG.
Two metal foils 50a, 50b and two dielectric films 52a, 52b are alternately stacked and wound around a core 60. The next pair of rollers 62a, 62'
a, 62b, 62'b are provided so as to be individually releasable. One metal foil 50a and one dielectric film 52a facing the winding core 60 are passed between the rollers 62a and 62'a. Similarly, rollers 62b,
A metal foil 50b and a dielectric film 5 are placed between 62′b and 62′b.
Pass 2b. Next, rollers 62a, 62'
A cutting device 70a for cutting the metal foil 50a is provided at a position in front of a. This cutting device 70a is composed of a sewing machine perforator 72a and a clamper 74a. Similarly, a cutting device 70b consisting of a perforator 72b and a clamper 74b is provided for the metal foil 50b. These cutting devices 70a, 7
0b can be operated individually. Furthermore, the winding core 6
0, the metal foil 50a that is not sandwiched between the dielectric films is placed in front of the dielectric film 52a.
A nozzle 80 is provided to eject compressed air so as to press the air.

One aspect of the operation of this device is shown below. Winding core 60
is rotated to the right in the figure, and only the two dielectric films 52a and 52b are wound in to form a lower winding. At this time, the two sets of paired rollers 62a, 62'a and 62b, 62'b are both in a released state, and both of the two metal foils 50a, 50b are stationary with their ends directly in front of the winding core 60. Only the dielectric films 52a and 52b are moving while sliding on both the metal foils 50a and 50b. Next, the roller 62'a is pressed against the roller 62a, and compressed air is ejected from the nozzle 80. As a result, the metal foil 50a is pressed by the moving dielectric film 52a, begins to move together, and begins to be wound around the winding core 60 together. After the start of winding, the jetting of the compressed air is stopped, the roller 62'a is moved and released from the roller 62a, and the metal foil 50a is continued to wind.
Next, when the roller 62'b is pressed against the roller 62b, the metal foil 50b is pressed against the moving dielectric film 52b, and together with the core 60, the metal foil 50b is pressed against the moving dielectric film 52b.
begins to get caught up in Roller 6 after start of winding
2'b is moved and released from the roller 62b, and the metal foil 50b continues to be rolled up.

Next, the perforator 72a is operated to perforate the moving metal foil 50a. When the perforation hole moves to a position just before the winding core 60, the metal foil 50a is clamped and stopped by the clamper 74a.
In this case, since the winding core 60 is rotating, the metal foil 5
0a is cut at the perforation hole position. The winding is further advanced, and then the metal foil 50b is cut in the same manner. When the winding core 60 is further rotated, only the dielectric films 52a and 52b are wound up to form an upper winding, and then the dielectric films are cut and joined to complete the capacitor.

As described above, this device has the pair of rollers 62a, 6
2'a starts to be rolled in by the cutting device 70a, and the cutting device 70a ends this wrapping, and the pair of rollers 62b, 62'b and the cutting device 70b perform the same operation for the metal foil 50b. Eggplant.

This device has pair rollers 62a, 62'a and 62
b, 62'b and the cutting devices 70a and 70b are constructed so that they can be operated independently, so that the starting and ending points of winding of each metal foil can be individually and arbitrarily controlled. Therefore, in addition to the above-mentioned operation, after the wrapping of the metal foil 50a is completed, the metal foil 50
The action of starting the winding of b, or the action of starting the winding of two metal foils at the same time as in the conventional device.
It is possible to perform an action to terminate the process.

3 and 4 show developed side views of a capacitor manufactured using this apparatus. In the example shown in FIG. 3, after the lower roll a, the metal foil 50a is started to be rolled in, then the metal foil 50b is started to be rolled in, then the metal foil 50a is finished being rolled in, then the metal foil 50b is finished rolled in, and the upper roll is finished. b. In this example, metal foil 5
The two metal foils face each other only at a portion c from the start of wrapping 0b to the end of wrapping metal foil 50a, and the capacitance is determined by the area of this portion. As can be seen from the above-mentioned configuration, this device can reduce this area without any limit, so it is possible to manufacture small-capacity capacitors that were not possible with conventional devices.

In the example shown in FIG. 4, the metal foil 50a is rolled up next to the lower roll a, and after this winding is completed, the metal foil 50b is rolled in, and then the upper roll b is formed. In this example, only the dielectric film is wound up in a portion d from the end of the winding of the metal foil 50a to the start of the winding of the metal foil 50b. Therefore, the two metal foils do not directly face each other through one dielectric film a, but rather face each other through several dielectric films. Therefore, the capacitance of the capacitor in this example is even smaller than that in the example shown in FIG.

As described above, the present device allows two metal foils to face each other in any desired manner, and as a result has the effect of making it possible to manufacture small capacitance capacitors, which was impossible with conventional devices.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional capacitor winding device, and FIG. 2 is a side view of a capacitor winding device of the present invention. FIGS. 3 and 4 are side views of developed capacitors manufactured by the capacitor winding device of the present invention. 50a, 50b...metal foil, 52a, 52b...dielectric film, 62a, 62'a, 62b, 6
2'b...roller, 70a, 70b...cutting device.

Claims (1)

[Claims] 1. When winding up two metal foils 50a, 50b and two dielectric films 52a, 52b alternately, two pairs of rollers 62a, 6 are used.
2'a, 62b, and 62'b are provided so that they can be released individually, and a metal foil and a dielectric film are passed between each pair of rollers in advance, and each metal foil is placed in front of these rollers. A capacitor winding device in which cutting devices 70a and 70b are individually operable.