JP2000030989A - Lead cutting equipment for chip type electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a right and a left lead to project by the same length from a pedestal and thereby cut them by the same length without taking the trouble to coaxially position the main body of a capacitor and the pedestal. SOLUTION: In a chip type electrolytic capacitor 5, a pedestal 4 made of heat-resistant synthetic resin is installed on an end face on the sealing section side of the main body 1 of the capacitor which has a pair of leads 3, 3 extracted from the sealing section of a metal case 2 storing a capacitor element. The leads 3, 3 are passeed through the pedestal and are bent in the direction going away from each other along the bottom face of the pedestal 4. For the occasion of cutting the leads 3, 3, positioning pins 62 are installed to position the pedestal 4 on a specified position on a mounting area of a support table 6 mounted with the capacitor 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead cutting device for a chip type electrolytic capacitor having a surface mounting seat plate mounted thereon. More specifically, each lead of a capacitor body is slightly projected from a side surface of the seat plate. The present invention relates to a lead cutting device that cuts in a state where the lead is cut.

[0002]

2. Description of the Related Art As with other chip components, aluminum electrolytic capacitors have also been formed into chips in order to enable surface mounting on a circuit board. One example is shown in FIGS. I have.

According to this, a capacitor body 1 is shown as a discrete type in which a capacitor element is accommodated in a bottomed cylindrical metal case 2 and a pair of leads 3 and 3 are drawn out from a sealing portion thereof. The seat plate 4 is attached to the end face on the side of the section (the end face on the side where the sealing groove 2a is formed). Each lead 3, 3 is originally made of a round bar-shaped CP wire (copper-coated steel wire), but is crushed flat by a press or the like before the seat plate 4 is attached, and FIG. Shown.

The seat plate 4 is made of a heat-resistant synthetic resin, and has a concave portion 4a for receiving the end face of the metal case 2 on the side of the sealing portion, and a pair of lead insertion holes 4b, 4b formed in the bottom of the concave portion 4a.
4b, and lead receiving grooves 4c, 4c are formed on the bottom surface of the seat plate 4 (the surface facing the circuit board surface). The lead storage grooves 4c, 4c are formed in a direction away from the lead insertion holes 4b, 4b, but FIG. 4 shows only one of them for convenience of drawing.

When the seat plate 4 is mounted on the capacitor body 1, the leads 3, 3 are pulled out from the lead insertion holes 4b, 4b toward the bottom surface of the seat plate 4, and the lead storage grooves 4c, 4 are formed.
folded along c. By bending the leads 3, 3, the seat plate 4 is held by the capacitor body 1.

Thereafter, the excess length of each of the leads 3, 3 is cut by the cutting device shown in FIG. 6, whereby the discrete capacitor body 1 is cut as shown in FIG. The chip type electrolytic capacitor 5 is provided.

[0007]

In this case, in the cutting device, a capacitor body 1 with a seat plate 4 (chip type electrolytic capacitor 5) is mounted, and corners of the cutting device facing the leads 3, 3 are lower blades 6a, 6a. And a pressing head 7 for pressing the chip-type electrolytic capacitor 5 from above, and upper blades 8, 8 for cutting the leads 3, 3 between the lower blades 6a, 6a. I have. The pressing head 7 and the upper blades 8 are held by a lifting base 9 connected to a lifting mechanism (not shown). A compression coil spring 7a is interposed between the pressing head 7 and the lifting base 9. Have been. The mounting surface of the support base 6 has a substantially larger area than the seat plate 4.

According to this, the chip type electrolytic capacitor 5
Is pressed by the pressing head 7 on the mounting surface of the support base 6, and the excess length of the leads 3, 3 is cut by the descending upper blades 8, 8.
This conventional cutting device has the following problems.

That is, when the leads 3 and 3 are soldered on a circuit board (not shown), the leads 3 and 3 are, for example, 0.3 mm from the seat plate 4 so that the soldering state can be visually observed.
Is cut so as to protrude, but the seat plate 4
3 is held by the capacitor body 1 by bending, and a predetermined clearance is provided between the metal case 2 and the recess 4a of the seat plate 4 and between the lead 3 and the lead insertion hole 4b of the seat plate 4, respectively. For this reason, the seat plate 4 is placed on the support base 6 in a state of being shifted from the center of the capacitor body 1, which may cause the leads 3, 3 to be cut to different lengths on the left and right.

However, in order to prevent this, when the seat plate 4 is attached to the capacitor body 1, after the capacitor body 1 and the seat plate 4 are coaxially positioned by some means,
There is a method of fixing both with an adhesive or the like. However, according to this method, not only a separate positioning means is required, but also an application step of an adhesive or the like must be added in the process, and productivity is increased. In addition, the cost is not preferred.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to separate the left and right leads from the seat plate without positioning the capacitor body and the seat plate very coaxially. It is an object of the present invention to provide a chip type electrolytic capacitor lead cutting device which can be cut with substantially the same projecting length.

[0012]

In order to achieve the above object, the present invention relates to a heat-resistant synthetic resin formed on a sealing body side end face of a capacitor body in which a pair of leads are pulled out from a sealing part of a metal case containing a capacitor element. Attaching a seat plate made of resin, and in a lead cutting device for a chip type electrolytic capacitor formed by bending the pair of leads through the seat plate and bending away from each other along the bottom surface of the seat plate, A support base having a substantially wide mounting surface and a corner portion facing each of the leads and having a lower blade, and a metal case of the chip-type electrolytic capacitor mounted on the support base from above. A pressing head that presses and fixedly holds the same between the support base and a pair of left and right upper blades that cut the lead in cooperation with the lower blade of the support base,
The support base is provided with positioning means for positioning the seat plate at a predetermined position on the mounting surface.

According to this, even if the capacitor body and the seat plate are displaced from each other, the seat plate is always positioned at a predetermined position on the mounting surface of the support table. Can be cut with almost the same length of protrusion from the base.

In this case, it is preferable that the positioning means is a pin fitted into a hole formed on the bottom surface of the seat plate. That is, since the pin is provided at a position covered by the bottom surface of the seat plate (in the projection plane of the seat plate), when the positioning means is provided on the support table, the mounting surface of the support table is changed or enlarged. No need to do.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in more detail with reference to FIGS.

As shown in FIG. 1, also in this lead cutting device, the capacitor body 1 with the seat plate 4 (the chip-type electrolytic capacitor 5), as in the conventional example described above.
Is mounted, and the corner facing the leads 3, 3 is the lower blade 6.
a, 6a, a pressing head 7 for pressing the chip-type electrolytic capacitor 5 from above, and an upper blade 8, 8 for cutting the leads 3, 3 between the lower blades 6a, 6a.
And

The pressing head 7 and the upper blades 8, 8 are held by a lifting base 9 connected to a lifting mechanism (not shown), and a compression coil spring 7a is provided between the pressing head 7 and the lifting base 9. It is interposed. The mounting surface of the support base 6 has a substantially larger area than the seat plate 4.

According to the present invention, the support plate 6 is provided with the seat plate 4 at a predetermined position on its mounting surface, that is, each of the left and right leads 3,3.
Positioning means is provided for positioning the cutting position at a position where cutting is performed with substantially the same length of projection from the seat plate 4.

In this embodiment, the positioning means is shown in FIG.
As shown in the cross-sectional view of FIG. Correspondingly, a hole 41 fitted with the pin 62 is provided on the bottom side of the seat plate 4.
Are formed. In this example, two pins 62 and two holes 41 are provided.

The positions of the pin 62 and the hole 41 are not particularly limited as long as they do not interfere with the leads 3 and 3, but FIG. 3 shows the position of the hole 41 provided in the seat plate 4 in this embodiment. This will be described below. FIG. 3A is a plan view of the bottom surface of the seat plate 4 as viewed from above, and FIG. 3B is a side view thereof.

According to this, at each of the four corners on the bottom surface of the seat plate 4, a disk-shaped boss 42 for obtaining stability at the time of mounting on a circuit board (not shown) is formed. Then, two adjacent bosses 42 have holes 41
Are coaxially formed. The depth of the hole 41 is greater than the height of the pin 62.

In FIG. 3A, the outline of the seat plate mounting surface 61 of the support base 6 is indicated by a two-dot chain line along the periphery of the seat plate 4, and here, the lead storage grooves 4c, 4c are shown. Edges 4d, 4d of the seat plate 4 where the respective groove ends are located, and the lower blade 6 opposed thereto.
Assuming that each width between the first and second seats 6a and 6a is W, the pins 62, 62 are fitted into the holes 41, 41, and the seat plate 4 on the seat plate mounting surface 61 so that the respective widths W are equal. Position.

Therefore, even when the capacitor body 1 with the seat plate 4 mounted on the support base 6 is not exactly coaxial with the capacitor body 1 and the seat plate 4, the pins 62, 6
According to 2, the seat plate 4 is always positioned so that the widths W are equal to each other, so that the leads 3 can be cut with the projecting lengths from the seat plate 4 being substantially the same.

In the above embodiment, the pins 62 as the positioning means are provided as a pair. However, the number of pins may be one, or three or more. In the above embodiment, the hole 41 corresponding to the pin 62 is formed coaxially with the disk-shaped boss 42, but the hole 41 may be formed in a portion other than the boss 42.

[0025]

As described above, according to the present invention,
A seat plate made of heat-resistant synthetic resin is attached to the sealing-side end surface of the capacitor body by pulling out a pair of leads from the sealing portion of the metal case containing the capacitor element. When cutting each lead of the chip-type electrolytic capacitor, which is bent in the direction away from each other along the bottom surface of the plate, place the seat plate on the support table on which the chip-type electrolytic capacitor is mounted on the mounting surface. By providing the positioning means for positioning at the position, the left and right leads can be cut with substantially the same length of projection from the seat plate without having to position the capacitor body and the seat plate very coaxially. .

Further, since the positioning means is a pin fitted into a hole formed in the bottom surface of the seat plate, the position where the positioning means is provided is within the projection plane of the seat plate. When providing, there is an effect that there is no need to change or enlarge the mounting surface of the support base.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a lead cutting device according to the present invention.

FIG. 2 is an essential part cross-sectional view illustrating a positioning means of the embodiment.

FIG. 3 is a plan view of the bottom surface side of the seat plate of the embodiment and a side view thereof.

FIG. 4 is an exploded perspective view of a chip-type electrolytic capacitor to be cut by the present invention.

FIG. 5 is a perspective view of a chip-type electrolytic capacitor to be cut according to the present invention after cutting leads.

FIG. 6 is a side view schematically showing a conventional lead cutting device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Condenser main body 2 Metal case 3 Lead 4 Seat plate 41 Hole 42 Boss 5 Capacitor main body with a seat plate (chip type electrolytic capacitor) 6 Support base 6a Lower blade 61 Base mounting surface 62 Pin 7 Pressing head 8 Upper blade

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Osamu Taguchi 2-2-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa F-term within ELNER Co., Ltd. 5E082 AA01 AB09 BC40 HH03 HH07 HH21 HH47 HH51 LL27 MM13 MM21 MM22

Claims (2)

[Claims] 1. A seat plate made of a heat-resistant synthetic resin is attached to an end face on a sealing portion side of a capacitor body obtained by pulling out a pair of leads from a sealing portion of a metal case in which a capacitor element is stored, and the pair of leads is connected to the above-mentioned lead. A lead type cutting device for a chip-type electrolytic capacitor, which is formed by penetrating a seat plate and bending in a direction away from each other along a bottom surface of the seat plate, comprising a mounting surface substantially wider than the seat plate, A support base having a lower blade as an opposing corner portion, and a pressing head for pressing the metal case of the chip-type electrolytic capacitor placed on the support base from above and fixing and holding the metal case with the support base. A pair of left and right upper blades for cutting the lead in cooperation with the lower blade of the support base, and a position for positioning the seat plate at a predetermined position on the mounting surface of the support base. Decision Lead cutting apparatus of the chip-type electrolytic capacitor, characterized in that means are provided. 2. The lead cutting device for a chip type electrolytic capacitor according to claim 1, wherein said positioning means comprises a pin fitted into a hole formed in a bottom surface of said seat plate.