JP2578389B2 - Container for forming lead terminals for electrolytic capacitors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a chemical conversion container used for forming a lead terminal for an electrolytic capacitor.

[0002]

2. Description of the Related Art As shown in FIG. 7, an aluminum wire 12 is welded to a lead wire 13 and a flat portion 11 is formed on the aluminum wire 12, as shown in FIG. It is necessary to form an oxide film on the surface of the aluminum wire 12 up to a predetermined position of a connection portion with the lead wire 13. In this formation step, conventionally, the lead wires 13 of the lead wire terminals 14 must be inserted one by one. A lead wire holder 36 having a large number of holes 35 is used.

The lead wire terminal 1 is inserted into a hole 35 of the holder 36.
When the lead wire 4 is inserted, the insertion is restricted by the thick aluminum wire 12 and stops. Therefore, the tips of the flat lead portions 11 of the many lead wire terminals 14 inserted in the same manner are almost aligned. Then, the inserted lead wire 13 is
Pressing is performed between the vertical holding surface 37 and the holding jig 38 to which the conductive brush is attached. This holding jig 38
Is connected to the anode of a power supply 39, and the cathode is
It is connected to the chemical conversion liquid 41 inside.

However, when such a holding member 36 is used, since the conductive portion of the pressing jig 38 for pressing the lead wire 13 toward the holding surface 37 is a conductive brush, the holding member 36 is completely in electrical contact. It is difficult to perform the process, and there is a risk of unformedness or sparks at the contact portion due to incomplete contact, and the lead wires 13 may fall off due to uneven pressing force. There is also a problem that workability is extremely poor because the work is inserted to the back of the device.

For the purpose of solving these problems, FIG.
And a large number of lead wire terminals 14 are accommodated in the open container 42 as shown in FIG.
A method is proposed in which the lead wire 13 in the open container 42 is sucked by the electrode jig 43 having magnetism, the open container 42 is held upside down, and the flat part 11 is immersed in a chemical liquid with the flat portion 11 facing downward. (Japanese Patent Publication No. 4-24852).

[0006]

However, since the lead wire terminal 14 has a thick aluminum wire 12 and the lead wire 13 has a small thickness, when the lead wire terminal 14 is housed in a conventional open container 42, the aluminum wire 12 must be connected. Even if they are densely packed, the intervals between the lead wires 13 are widened. For this reason, as shown by A in FIG.
Other lead wires 13 can easily enter between 3 and 13, and as a result, the lead wire terminal 14 of A may be held in the open container 42 in an inclined posture. In such a case, there is a problem in that only the lead wire terminal 14 of A is not immersed in the chemical conversion liquid up to the predetermined position of the flat portion 11, resulting in an incomplete defective chemical conversion treatment.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent inclination of a lead wire terminal in an open container, reduce the occurrence of defective products, and improve the quality of chemical conversion treatment.

[0008]

In order to achieve the above object,
A container for forming a lead wire terminal for an electrolytic capacitor according to the first aspect of the present invention is provided with a funnel-shaped regulating plate having a smaller diameter as the peripheral wall becomes lower at the bottom of an aluminum cylindrical container having an upper surface opening .

According to a second aspect of the present invention, there is provided an aluminum plate having a top opening.
At the bottom of the cylindrical container , a funnel-shaped regulating plate having a smaller diameter as the peripheral wall becomes lower is provided, and the funnel-shaped regulating plate covers a drain hole formed in the bottom surface of the cylindrical container and is formed at the lower end of the funnel-shaped regulating plate. This is a container for forming a lead wire terminal for an electrolytic capacitor, in which the inside of the cylindrical container and the drainage hole are communicated by the cutout.

Further, according to the invention of claim 3, the upper end opening of the funnel-shaped regulating plate is fitted tightly to the inner wall of the cylindrical container, and the lower end opening of the funnel-shaped regulating plate is fitted to the bottom surface of the cylindrical container. A container for forming a lead wire terminal for an electrolytic capacitor according to claim 1 or 2, which is in contact therewith.

According to a fourth aspect of the present invention, a cylindrical spacer having a diameter smaller than that of the cylindrical container is integrally extended at an upper end opening of the funnel-shaped regulating plate, and the spacer is provided inside the cylindrical container. The container for forming a lead wire terminal for an electrolytic capacitor according to claim 1 or 2, which is fitted.

According to a fifth aspect of the present invention, there is provided the electrolysis apparatus according to any one of the first to fourth aspects, wherein a bottom plate is integrally provided at a lower end opening of the funnel-shaped regulating plate, and the regulating plate is formed in a dish shape. It is a container for forming lead wires for capacitors.

[0013]

The chemical conversion container according to the present invention accommodates a large number of lead wire terminals. Since the funnel-shaped regulating plate having a smaller diameter is provided inside the cylindrical container as the peripheral wall is lower, the lead terminal is inserted. At this time, the leading ends of the lead wires are guided by the peripheral wall of the funnel-shaped regulating plate and converge, and the leading ends of the lead wires are densely packed with each other. Therefore,
A large number of lead wire terminals can be inserted smoothly, and furthermore, it is difficult for other lead wires to enter between the lead wires in the upright posture, and the inclination of the lead wire terminals can be prevented. As a result, the heights of the aluminum wires are uniform, and the aluminum wires can be immersed in the chemical conversion liquid up to the same position, so that defective products are less likely to occur and the quality of the chemical conversion treatment can be improved.

According to the second aspect of the present invention, the cleaning liquid that has entered the cylindrical container in the cleaning step is drained from the cylindrical container through the notch at the lower end of the regulating plate from the inside of the cylindrical container after cleaning. Since it is discharged from the hole to the outside, it can be easily and completely dehydrated, and since the lead wire terminals can be washed together while being housed in the container, their postures are not inconsistent and handling is extremely smooth. . Further, since the drain hole formed in the bottom surface of the cylindrical container is covered with the regulating plate, there is no possibility that the lead wire terminal falls out through the drain hole.

Further , when the upper end opening of the funnel-shaped regulating plate is fitted to the inner side wall of the cylindrical container, the lead terminal is provided in the gap between the funnel-shaped regulating plate and the cylindrical container. There is no risk of getting in. Further, when the lower end opening of the funnel-shaped regulating plate is in contact with the bottom surface of the cylindrical container, the jig is transparent when the lead wire terminal in the container is sucked and held by the magnetic jig from the outer bottom surface of the cylindrical container. Since the lead terminal can be sucked only through the bottom surface of the magnetic cylindrical container, the holding is reliable.

According to a fourth aspect of the present invention, a cylindrical spacer having a diameter smaller than that of the cylindrical container is integrally extended at an upper end opening of the funnel-shaped regulating plate, and the spacer is attached to the cylindrical container. When fitted inside, a thin lead wire terminal can be formed using a cylindrical container having the same outer diameter, so that handling such as transportation can be performed in a unified manner.

Further , if the bottom plate is integrally provided at the lower end of the funnel-shaped regulating plate and the regulating plate is formed in a dish shape, the strength of the regulating plate can be increased. ,
When the control plate is fitted into the cylindrical container, the control plate is not distorted, and the generation of a gap between the upper end of the control plate and the cylindrical container can be prevented.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a chemical conversion container according to an embodiment of the present invention, which comprises a cylindrical container 2 and a regulating plate 3 to be disposed therein. The cylindrical container 2 is made of aluminum which is a magnetically permeable material, and a drain hole 5 is appropriately formed in a flat bottom surface 4 thereof.

The regulating plate 3 is made of aluminum, which is also a magnetically permeable material, and is formed in a funnel shape having an opening at the top and bottom and a narrow lower end 6. The outer diameter of the upper end is substantially equal to the inner diameter of the cylindrical container 2, and a number of notches 7 are formed on the periphery of the lower end 6. The restricting plate 3 is pressed into the bottom of the cylindrical container 2 from the opening thereof, whereby the upper end of the restricting plate 3 is tightly fitted on the inner periphery of the cylindrical container 2 to assemble the chemical conversion container 1.

As shown in FIG. 3, a plurality of lead terminals 14 obtained by welding a lead wire 13 to an aluminum wire 12 having a flat portion 11 are formed so that the lead wire 13 contacts the bottom surface of the chemical conversion container 1. insert.

As shown in FIG. 6, an electrode jig 21 having magnetism is arranged on the bottom surface of the chemical conversion container 1 in which the lead wire terminals 14 are accommodated, and the electrode jig 21 is connected to an anode of a power source 22. I do. In this state, the lead wire 13 is connected to the electrode jig 2
The tip of the flat portion 11 can be also adjusted to a certain height because the magnet 1 is attracted and held, does not fall even when inverted, and the tip of the lead wire 13 is in contact with the bottom surface of the chemical conversion container 1. it can.

[0022] The aluminum wire 12 of the lead wire terminal 14 which is held in this manner chemical container 1 is immersed in the chemical conversion solution 24 in the anodizing tank 23. Since the cathode of the power supply 22 is connected to the chemical conversion liquid 24, the flat portion 11 immersed in the chemical conversion liquid 24 can be formed by turning on the power supply 22. At this time, since the height of the flat portion 11 is constant as described above, any flat portion 11 can be immersed in the chemical conversion liquid 24 to the same position. Reference numeral 25 denotes a mounting jig. The position of the aluminum wire 12 immersed in the chemical liquid 24 can be adjusted by bolts 26, 26 screwed into the mounting jig.

As described above, in the present embodiment, a large number of lead wire terminals 14 can be efficiently formed, and the lead wire terminals 14 are securely attracted and held by the electrode jig 21 having magnetism. The occurrence of defective products due to these can be prevented without causing a variation in holding force.

Since the funnel-shaped regulating plate 3 having a smaller diameter as the peripheral wall is lower inside the cylindrical container 2, the tip of the lead wire 13 is inserted into the funnel-shaped regulating plate 3 when the lead wire terminal 14 is inserted. It is guided by the peripheral wall and converges, so that each lead wire 13
The tips of each other are dense. Therefore, the lead wire terminals 14 can be inserted smoothly and the lead wires 13 and 1 in the upright posture can be inserted.
3 makes it difficult for the other lead wires 13 to enter, so that the inclination of the lead wire terminal 14 can be prevented. As a result, the flat portion 1
Since the height of 1 is constant and all the flat portions 11 are immersed in the chemical conversion liquid 24 to the same position, a chemical conversion film can be formed at an accurate position.

On the other hand, the cleaning liquid in the cleaning process has penetrated into the cylindrical container 2, through the notches 7 of the periphery of the lower end 6 of the regulating plate 3 from the cylindrical vessel 2, from the drainage hole 5 of the tubular container 2 bottom Since they are discharged to the outside, they can be easily and completely dewatered after washing, and since they can be washed together with the lead wire terminals 14 housed in the container 1, their postures do not vary, and handling is extremely difficult. Become smooth. Furthermore, since the drain hole 5 formed in the bottom surface of the cylindrical container 2 is covered with the regulating plate 3, there is no possibility that the lead wire terminal 14 falls out through the drain hole 5. The washing step is performed before the chemical conversion step.

Furthermore, since press-fitting the regulating plate 3 to the tubular container 2, it is easy assembly without requiring an adhesive or the like. In addition, since the upper end of the regulating plate 3 and the inner wall of the cylindrical container 2 are in close contact with each other, the lead wire terminal 1 is inserted into the gap between the regulating plate 3 and the cylindrical container 2.
There is no danger of 4 entering. Since the lower end of the regulating plate 3 is opened toward the inner bottom surface of the cylindrical container 2, the electrode jig 21 is opened.
Is the lead wire terminal 1 separated only by the bottom surface 4 of the permeable cylindrical container.
4 can be sucked, so that the holding is reliable.

[0027] Depending on the type of the electrolytic capacitor, there are those leads also various length and thickness terminal, when performing a chemical conversion treatment to a thin lead terminals, in place of the regulating plate 3 above , Cylindrical spacer 3 as shown in FIGS. 2 and 4
It is preferable to use a regulating plate 32 having a 1 and press-fit it into the cylindrical container 2. In this configuration, a thin lead wire terminal can be formed using the cylindrical container 2 of the same standard, which is economical.
The outer diameter of the cylindrical container 2 can be made a single type, and uniform handling becomes possible.

Further, more than in the embodiment, although the overall chemical container 1 was made of aluminum, of cylindrical container 2 timber
In terms of quality, other non-magnetic and conductive metals (for example, brass,
Copper) can also be used. In addition, the chemical conversion container 1
Make the bottom surface 4 non-magnetic and conductive, and use plastic
It may be made of an insulating material such as a metal. However, the above
As in the embodiment, the entire chemical conversion vessel 1 is made of aluminum.
Chemical containers can be manufactured relatively inexpensively and suitable for mass consumption.
In addition, it is easier to process because it has better ductility than other materials
And has the advantage of being lightweight. In addition, the regulating plates 3 and 32 do not necessarily have to play a role as a passage for electricity during the chemical conversion step, and therefore may be made of an insulating material such as plastic.

Further , as another configuration example relating to the regulating plate,
As shown in FIG. 5, the bottom plate 5
2, the regulating plate 51 may be formed in a dish shape. In this case, the regulating plate 51 is reinforced by the bottom plate 52, so that the regulating plate 51 is not deformed when the regulating plate 51 is pressed into the open container 2, and the outer edge of the restricting plate 51 and the inner wall surface of the open container 2 There is an advantage that no air gap is generated between them and there is no possibility that the lead wire terminal 14 will fall off. In the present embodiment, the chemical conversion container 1 having both the regulating plate 3 and the drain hole 5 has been described. However, in the present invention, a configuration in which only the regulating plate 3 is provided without the drain hole 5 may be employed.

[0030]

As described above in detail, according to the present invention, since the funnel-shaped regulating plate having a smaller diameter as the peripheral wall becomes lower is housed in the cylindrical container, the tip of the lead wire has a funnel-like shape when the lead wire terminal is inserted. Guided by the peripheral wall of the regulating plate, the tips of the lead wires converge and converge with each other. Therefore, a large number of lead wire terminals can be smoothly inserted, and it is difficult for other lead wires to enter between the lead wires in the upright posture, and inclination of the lead wire terminals can be prevented. As a result, the height of each aluminum wire is uniform, and the aluminum wires can be immersed in the chemical conversion liquid up to the same position, so that defective products are less likely to occur and the quality of the chemical conversion treatment can be improved.

Further , the drainage hole formed in the bottom surface of the cylindrical container is covered with the funnel-shaped regulating plate, and the inside of the cylindrical container and the drainage hole are communicated with each other by a cutout formed at the lower end of the funnel-shaped regulating plate. Since the cleaning liquid that has entered the cylindrical container at the end of the cleaning is discharged from the cylindrical container through the cutout at the lower edge of the regulating plate to the outside through the drain hole on the bottom surface of the cylindrical container,
It can be easily and completely dewatered, and since the lead wire terminals can be washed together while being accommodated in the container, their postures are not misaligned and handling is extremely smooth. Further, since the drain hole formed in the bottom surface of the cylindrical container is covered with the regulating plate, there is an excellent effect that there is no possibility that the lead wire terminal falls out through the drain hole.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a chemical conversion container according to an embodiment of the present invention.

FIG. 2 is a perspective view showing another configuration example of the regulating plate.

FIG. 3 is a front sectional view showing a use state of the chemical conversion container.

FIG. 4 is a front sectional view showing another configuration example of the chemical conversion container.

FIG. 5 is a front sectional view showing another configuration example of the regulating plate.

FIG. 6 is a front sectional view showing a chemical conversion step using the chemical conversion container of the embodiment of the present invention.

FIG. 7 is a front sectional view showing a conventional chemical conversion process.

FIG. 8 is a front sectional view showing a use state of a chemical conversion container before improvement according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chemical conversion container 2 Cylindrical container 3, 32, 51 Regulatory plate 5 Drainage hole 7 Notch

Claims (5)

(57) [Claims] 1. A container for forming a lead wire terminal for an electrolytic capacitor, comprising a funnel-shaped regulating plate having a smaller diameter as its peripheral wall becomes lower at the bottom of an aluminum cylindrical container having an upper surface opening . 2. A funnel-shaped regulating plate having a smaller diameter as its peripheral wall is downwardly provided at the bottom of an aluminum cylindrical container having an upper surface opening . The funnel-shaped regulating plate covers a drain hole formed in the bottom surface of the cylindrical container. A container for forming a lead wire terminal for an electrolytic capacitor, wherein the inside of a cylindrical container and a drain hole are communicated with each other by a notch formed at a lower end portion of a shape regulating plate. 3. The funnel-shaped regulating plate has an upper end opening tightly fitted to an inner wall of the cylindrical container, and a lower end opening of the funnel-shaped restricting plate is in contact with the bottom surface of the cylindrical container. Or a container for forming a lead wire terminal for an electrolytic capacitor according to 2 above. 4. A cylindrical spacer having a diameter smaller than that of the cylindrical container is integrally extended at an upper end opening of the funnel-shaped regulating plate, and the spacer is fitted inside the cylindrical container. Item 1
Or a container for forming a lead wire terminal for an electrolytic capacitor according to 2 above. 5. The control plate according to claim 1, wherein a bottom plate is integrally provided at a lower end opening of the funnel-shaped control plate, and the control plate is formed in a dish shape.
5. A container for forming a lead terminal for an electrolytic capacitor according to 2 or 4 .