JPS6211773B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for feeding lead tabs for electrolytic capacitors, in which the tab placed on a feeding rail is advanced by vibration of the rail, and at the same time, the lower end of the CIP wire of the tab is prevented from falling abnormally. This solved the problem of the tab getting caught by the rail.

The strip-shaped aluminum foil for electrolytic capacitors is wound up into a long length with lead tabs for connecting lead wires attached one after another at required intervals, and stored as a coil. The tab attachment to the aluminum foil is automated, and the tab feeding is also automated, for example, by a linear feeder 10 as shown in FIG. However, while the tabs were being fed, the left and right rails would often catch the tabs and stop the following tabs, so we had to keep an eye on them.
If a part of the aluminum foil coil is wound without a tab attached, the aluminum foil coil will contain defects and its reliability will be impaired.

An example of a lead tab is shown in FIGS. 1-3. Diameter 1
Aluminum tab part 1a which is an aluminum rod of about mm
The upper part of the battledore is crushed to form a battledore 1b that is attached to the foil, and the CIP wire 1c (a steel wire containing copper and a terminal for connecting lead wires) with a thickness of about 0.5 mm is attached to the lower end of the battledore 1b as shown in Figure 3.
are welded by electric resistance.

During resistance welding, the tip of the CHP wire 1c is pushed into the aluminum tab portion 1a, and partially molten aluminum surrounds the welded portion 1d in a rough state. Therefore, the welded portion 1d has a wide variety of shapes. Since such an aluminum tab part 1a is placed on the left and right rails 2, 2, and the CIP wire 1c is fed by hanging between both rails, it is easy to fit between the rails 2, 2 depending on the shape and dimensions of the welded part 1d. It is. but,
This is the only way to feed the lead tabs in the same position, so when the tabs were caught on the rail 2, there was no choice but to remove them manually.

As a professional manufacturer of electrolytic capacitors, the present inventor has researched this problem and found that the best lead tab feeding method is a method in which the parallel rails are vibrated diagonally. It was found that even if the method was devised, it was not possible to completely prevent the tab from being caught by the rail.

When tab 1 is held on the rail, we considered using a machine to pick up the battledore 1b and remove it manually, but it was difficult to automate this process.

Various other preventive measures were considered, but none were successful as they were aimed at irregularly shaped aluminum tabs.

In this way, we arrived at the idea of this invention, which utilizes the CIP line 1c that runs hidden below the rails. The CHP line 1c hanging in the rail gap is
This is a part that would be completely unthinkable if the tab 1 were to be unclogged manually, but mechanically it was the most convenient part.

The outline of the invention obtained in this way is that the lead tab 1 is advanced by hanging the CPP wire 1c serving as a terminal between the left and right rails 2, 2, and placing the aluminum tab portion 1a welded to the upper end of the CPP wire 1c on the left and right rails 2, 2. During feeding, while applying vibration to the left and right rails 2, 2 to advance the tab 1, a receiving plate 8 is passed parallel to the rail 2 at the lower part of the gap between the left and right rails 2, 2.
This is a feeding method for an electrolytic capacitor tab, characterized in that the upper surface of the cable prevents the lower end of each CIP wire 1c from falling abnormally.

A linear feeder 10 as shown in FIG. 4 can be used as is to apply vibration to the left and right rails 2, 2 to advance the tab 1. As is well known, the lower ends of inclined parallel leaf springs 4, 4 are fixed on a fixed base 3, and the upper ends are fixed on the lower surface of a rail support base 5, and the electromagnet 6 on the fixed base 3 is adjusted to the cycle of the current. The iron piece 7 on the side of the support stand 5 is attracted and vibrated. Since the vibration direction of the support base 5 is inclined as shown by arrow A,
The rails 2, 2 push the tab 1 upward and forward and then return. The friction between the tab and rail is strong when pushing up and weak when pushing down, so this vibration causes tab 1
moves forward.

Due to the vibration of the rail 2, the tab 1 also moves forward while shaking, but since the CIP line 1c serves as a weight, it does not tilt significantly. By preventing the lower end of the CIP wire 1c from falling abnormally, the aluminum tab portion 1a of the rails 2, 2 is prevented from being grabbed. Abnormal descent means aluminum tab part 1
This indicates a state where the welded part 1d at the lower end of a has fallen into the gap between the rails 2, and there is a high possibility that it will be caught.

The use of the receiving plate 8 to prevent abnormal lowering of the lower end of the CIP wire 1c is arbitrary, but it can be roughly divided into static use and dynamic use. The embodiment of FIG. 4 is a static case. That is, in order to apply the present invention to a conventional linear feeder 10, a receiving plate 8 is passed parallel to the rails below the gap between the rails 2, and is held stationary at a required height by support rods 9, 9. The aluminum tab portion 1a and the CIP wire 1c sent by the vibration of the rails 2, 2 move up and down slightly and advance, but unless they descend abnormally, the receiving plate 8
without interference. However, if the welded part 1d sinks into the gap between the rails 2 and 2 and tries to descend abnormally, the receiving plate 8
prevents it. The receiving plate 8 is installed at such a height.

The embodiments shown in FIGS. 5 and 6 are examples in which the receiving plate 8' is used dynamically. Only the left end of the linear feeder 10 is shown, but in this case the receiving plate 8' is cantilevered, and the swinging rod 1 is supported by the wire 1 and spring 12 that are intermittently pulled.
3 swings back and forth, the elevating frame 15 fixed to the support rod 9 moves up and down due to the movement of the ball bearing 14 at the bottom of the rod 13, and the receiving plate 8' also moves up and down. Since the circumferential radius of the cam 16 at the lower end of the elevating frame 15 is smaller than the swing radius of the bearing 14, it moves up and down as the bearing 14 swings. At the top of the lifting frame 15,
An adjustment screw 18 is attached to the long hole 17 of the support rod 9 inserted from above, so that the height can be adjusted.

This elevating frame 15 is guided and supported by a bracket 20 extending from the base frame 19, and the upper end support shaft 21 of the swing rod 13 is also attached to this bracket 20.

This dynamic receiving plate 8' has the advantage that unlike the static receiving plate 8 described above, the height does not need to be precisely adjusted.
If the receiving plate 8' is repeatedly moved up and down at a frequency larger than the vibration frequency of the rails 2, 2, the propulsion action by the rails will not be inhibited. The aluminum tab portion 1a and the CIP line 1c move slightly up and down on the rails 2, 2 due to the vertical movement of the receiving plate 8'. Even if the aluminum tab part 1a descends abnormally and gets caught between the rails 2, 2,
It is immediately pushed up by the receiving plate 8'. The amount of push-up may be minimal.

The above description has been made of the case where the present invention is applied to a conventional linear feeder, but the invention is of course not limited to this, and any device that advances the tab with a CHP line hanging between the left and right rails can be applied to the present invention. Can be targeted.

In automatic feeding of aluminum tabs with CIP wire welded to them, this invention eliminates the gripping of the tab weld by the rail, which was thought to be fatal, by using a receiving plate to catch the lower end of the CIP wire hanging in the rail gap. The problem was solved using a simple method without causing any problems in the feeding operation. The tab continues to advance by being vibrated and driven by the aluminum tab part or welded part placed on the rail, and the rail is completely prevented from grabbing the welded part by the catch plate that prevents the lower end of the CIP wire from falling abnormally, so it is always fed smoothly. .

With this invention, the automated feeding of lead tabs for electrolytic capacitors became true automation that did not require human labor for the first time. It also greatly contributes to improving the quality of attaching lead tabs to wound aluminum foil coils.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views of an example of a lead tab to which this invention applies, Figure 3 is an enlarged explanatory view of a welded part, and Figure 4 is an explanatory diagram of a device in which this invention is applied to a conventional linear feeder. , 5 and 6 are a front view and a side view of main parts of another embodiment. 1...Lead tab, 1a...Aluminum tab part, 1c...
CCP line, 2...Rail, 8...Push plate, 9...Push up bar.

Claims (1)

[Claims] 1 A CPP wire serving as a terminal is suspended between the left and right rails, and an aluminum tab portion welded to the upper end of the CPP wire is placed on the left and right rails. When feeding the lead tab, a vibration is applied to the left and right rails to advance the tab. The method for feeding a lead tab for an electrolytic capacitor is characterized in that the upper surface of a receiving plate is passed parallel to the rail at the lower part of the left and right rail gap to prevent abnormal lowering of the lower end of each of the CPP wires.