JP2861367B2 - Electrolytic capacitor sealing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic capacitor sealing device for sealing a capacitor element in a case using a sealing body.

2. Description of the Related Art Generally, as shown in FIG. 3, an electrolytic capacitor is formed by winding an anode foil and a cathode foil made of aluminum foil through a separator, and electrolytically forming a lead wire 1 from the anode foil and the cathode foil. The impregnated liquid is stored in a metal case 3 made of aluminum or the like, and a sealing body 4 made of a rubber material or the like penetrating the lead wire 1 is assembled into the opening of the metal case 3, and then FIG. As shown in FIG. 4, a portion corresponding to the side surface of the sealing body 4 is subjected to squeezing by a squeezing roller 5 from the outside of the metal case 3, and then, as shown in FIG. In order to form an electrolytic capacitor as shown in FIG.

A conventional sealing device for such an electrolytic capacitor has a configuration as shown in FIG. That is,
The case chuck jig 8 of the turntable 7 holds the metal case 3 in which the capacitor element 2 and the sealing body 4 are assembled, and a case chuck 9 for fixing and holding the metal case 3 is provided. Bearing 11 on frame 10
The throttle levers 13 and 14 are pivotally mounted on both sides of the lower end of the inverted T-shaped rotary body 12 attached via the upper end, and the upper ends of the throttle levers 13 and 14 are attached to the conical cam 25 mounted on the rotary body 12. The attached cam followers 16 and 17 are pressed against each other, and the aperture rollers 5 and the curl rollers 6 are attached to the lower ends of the aperture levers 13 and 14, respectively.
The belt 19 is stretched around a pulley 18 attached to the upper part of the motor 12 to transmit the rotation of the motor 20.

In the above-described configuration, the metal case 3 in which the capacitor element 2 and the sealing body 4 are assembled is used as a case chuck jig 8 of the turntable 7.
And is supplied and fixedly held at a regular position by the case chuck 9. In this state, the rotating body 12 is rotated by the motor 20, and at the same time, the conical cam 15 is moved down along the rotating body 12 by a lever (not shown), and the diaphragm levers 13, 14 cam followers 1
6, 17 can be pushed outward, and the squeezing lever
Squeeze roller 5 and curl roller 6 attached to the lower ends of 13, 14
Is pressed against the metal case 3, and the drawing and curling are performed by the rotation of the rotating body 12, and the sealing is performed. When the closing process is completed, the conical cam 15 moves upward to separate the squeeze roller 5 and the curl roller 6 from the metal case 3, the case chuck 9 is also opened, and the turntable 7 is intermittently driven, and the next one is moved to a predetermined position. To perform the sealing process.

Problems to be Solved by the Invention In the conventional sealing device for an electrolytic capacitor described above, since the turntable 7 and the drawing portion are separately formed, drawing can be performed only while the turntable 7 is stopped. However, there is a problem that the precision of alignment between the metal case 3 and the squeeze roller 5 and the curl roller 6 is poor, and a stable sealing cannot be performed.

Further, in the case where the sealing process is performed by the sealing device having the above configuration, as shown in FIG. 7, the curl roller 6 is fixed in the height direction, so that the gap between the upper surface of the sealing body 4 and the curling portion 3a of the metal case 3 is formed. A gap A was generated in the sample, and the sealing property was not sufficiently satisfactory.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a sealing device for an electrolytic capacitor having excellent productivity, high positioning accuracy of drawing, and excellent sealing performance. is there.

Means for Solving the Problems In order to solve the above problems, the present invention provides a case chuck for holding a metal case incorporating a capacitor element and a sealing body on a turntable that rotates intermittently at regular intervals, A squeeze roller that squeezes the upper side of the metal case on a support block provided on the turntable close to the chuck and a curl roller that curls the open end of the metal case can be moved toward and away from the metal case, and can be rotated with respect to the metal case. And a drawing processing section that allows only the curl roller to move up and down.

Operation With this configuration, the drawing portion can be driven while the turntable is rotating to perform drawing, and the positioning accuracy of the drawing portion can be increased with respect to the metal case to be processed. It is possible to perform a stable sealing process without generating a gap between the body and the curling portion.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The apparatus main body 21 is provided with a shaft 22, and this shaft 22 is fixed to a shaft 23, which is also fixed to the apparatus main body 21.
It is rotatably built in. A block 41 is rotatably arranged on the outer periphery of the lower portion of the fixed shaft 23.
A support block 24 is attached to the outer periphery of 41, and a turntable 25 is attached. On the turntable 25, a case chuck 26 is provided at regular intervals. The case chuck 26 is provided with a capacitor element 2 impregnated with an electrolytic solution and a metal case 3 incorporating a sealing body 4 shown in FIG. Is held. A support piece 27 is provided above the support block 24, and a hollow cylindrical rotary body 28 is rotatably held on the support piece 27. The center line of the rotary body 28 is a turntable.
The center of the metal case 3 held by the 25 case chucks 26 coincides with the center. A hollow shaft 29 is incorporated in the rotating body 28 so as to be vertically movable, and mounting pieces 30 and 3 are provided on opposite sides of a lower end of the rotating body 28 and a lower end of the hollow shaft 29, respectively.
1 is provided. A unit presser 32 is incorporated in the hollow shaft 29 so as to be able to move up and down so as to press the center of the capacitor unit held by the case chuck 26.

Further, a conical cam 34 is incorporated in the outer periphery of the lower part of the rotating body 28 so as to be vertically movable.
And a cam follower 37, provided at the upper end of the throttle levers 35, 36 whose intermediate portions are pivotally attached to the mounting piece 31 of the hollow shaft 29.
38 are in pressure contact. An aperture roller 39 is provided at the lower end of the aperture lever 35, and a curl roller is provided at the lower end of the aperture lever 36.
When the conical cam 34 moves up and down, the squeezing roller 39 and the curl roller 40 are
And presses away from or separates from the metal case 3 of the capacitor unit held in the housing. The drawing processing section is configured to include a portion for driving the drawing roller 39 and the curl roller 40.

The conical cam 34 has an intermediate portion connected to one end of a lever 33 pivotally connected to the support block 24, and a cam follower 42 at the other end of the lever 33 always contacts a fixed cam 43 provided on the fixed shaft 23. The lever 33 swings with the rotation of the turntable 25, and is configured to move the conical cam 34 up and down about the rotating body 28 as an axis. A driven wheel 44 is attached to the upper part of the rotating body 28, and the driven wheel 44
An idler 47 rotatably attached to an idler arm 46 attached to a support arm 45 that supports a support block 24 rotatably provided with respect to the idler arm 47. The idler 47 is driven by a driven wheel 48 fixed to the upper end of the shaft 22. The driven wheel 48, the idler 47, and the driven wheel 44
Is rotated, and the rotating body 28 and the hollow shaft 29 are rotated. Further, a clutch brake 49 is provided near the driven wheel 44 of the rotating body 28, and is configured to stop the rotation immediately after performing a predetermined rotation.

Further, a spring support 50 is attached to an upper portion of the portion supported by the support piece 27 of the rotating body 28, and an upper portion of the hollow shaft 29 projecting upward from the upper end of the rotating body 28 has a flange 51 at a lower end. The motion control body 52 is fixed, and the vertical motion control body 52 is
A coil spring 53 is inserted between the 50, and the hollow shaft 29 is constantly urged upward by the spring 53. A support block is provided on the upper surface of the flange 51 of the vertical movement control body 52.
A cam follower 55 at one end of a vertically moving lever 54 pivotally attached to the upper end of the 24 is in pressure contact, and a cam follower 56 at the other end of the vertically moving lever 54 is in pressure contact with a vertical fixed cam 57.

A detent 58 is provided at the upper end of the unit holder 32.

In the above configuration, the operation is as follows. That is, when a capacitor unit composed of the metal case 3 incorporating the capacitor element 2 and the sealing body 4 is supplied to the case chuck 26 at a certain rotation position of the turntable 25, the unit holder 32 moves down and the center of the capacitor unit is moved. Hold down. Then, when the turntable 25 starts rotating, the lever 33 is rotated clockwise by the fixed cam 43 provided on the fixed shaft 23 to move the conical cam 34 upward, and the cam followers 37 and 38 pressing against the conical cam 36 are pressed. Following this, the squeezing levers 35 and 36 are rotated to bring the squeezing roller 39 provided at the lower end of the squeezing levers 35 and 36 into pressure contact with a position corresponding to the side surface of the sealing body 4 of the metal case 3 and curl. The roller 40 is pressed against the open end of the metal case 3. After this state, the shaft 22 starts rotating, and the driven wheel 48, the idler 47, the driven wheel 44
, The rotating body 28 and the hollow shaft 29 start rotating, and the squeezing roller 39 and the curling roller 40 rotate around the condenser unit to perform squeezing and curling. During the rotation, the vertical movement lever 54 is swung by the vertical fixed cam 57 to move the vertical movement control body 52 up and down against the coil spring 53 to move the hollow shaft 29 up and down. The curling process is performed by moving the curl roller 40 of the squeezing lever 36 attached to the lower end up and down so as to form the shape shown in FIG. 2 without forming a gap on the upper surface of the sealing body 4.

By such an operation, the capacitor unit is sealed to complete the electrolytic capacitor.

Then, when the turntable 25 rotates to the next station, the sealing process is completed, and the fixed cam 43 is rotated.
As a result, the conical cam 34 moves downward via the lever 33, and the squeezing levers 35 and 36 are rotated in the reverse
9, The curl roller 40 is separated from the capacitor unit, and the unit presser 32 is also moved upward so that the completed electrolytic capacitor can be taken out.

By repeating such an operation, the sealing process of the electrolytic capacitor can be performed continuously, efficiently and stably.

Effect of the Invention As described above, the sealing device of the electrolytic capacitor of the present invention is configured, so that the sealing process can be performed even while the turntable is rotating, and the drawing portion is provided integrally with the turntable. The position accuracy of the squeeze roller and curl roller with respect to the capacitor unit to be processed is also increased,
In addition, since the curl roller can move up and down as well as rotate, the curled portion can be brought into close contact with the sealing member without forming a gap, and this has the advantage of greatly improving the sealing performance. It is of great industrial value.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a sealing device for an electrolytic capacitor according to the present invention, FIG. 2 is a cross-sectional view showing an electrolytic capacitor sealed by the sealing device, and FIG. 3 is a general sealing process. Sectional view showing the previous capacitor unit, FIG.
5A and 5B are explanatory views showing the sealing process, FIG. 5 is a cross-sectional view of the sealed electrolytic capacitor, FIG. 6 is a cross-sectional view of a conventional electrolytic capacitor sealing device, and FIG. 7 is a conventional device. It is sectional drawing which shows the sealed electrolytic capacitor. 2 ... Capacitor element, 3 ... Metal case, 4 ... Sealing body, 22 ... Shaft, 23 ... Fixed shaft, 24 ... Support block, 25 ... Turntable, 26 ... Case chuck, 27
…… Support piece, 28 …… Rotating body, 29 …… Hollow shaft, 30,31 ……
Mounting piece, 32 Unit holder, 33 Lever, 34 Conical cam, 35, 36 Iris lever, 37, 38 Cam follower, 39 Iris roller, 40 Curl roller, 43 … Fixed cam, 44, 48… driven wheel, 47… idler, 50…
Spring support, 51: flange, 52: vertical movement control body, 53: coil spring, 54: vertical movement lever, 57: vertical fixed cam.

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toshiharu Tanimoto 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-15410 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01G 13/00

Claims (1)

(57) [Claims] 1. A case chuck for holding a metal case incorporating a capacitor element and a sealing body on a turntable that rotates intermittently is provided at regular intervals, and a support block provided on the turntable close to the case chuck is provided. A squeezing roller that squeezes the upper side surface of the metal case and a curl roller that curls the open end of the metal case can be moved toward and away from the metal case and can be rotated with respect to the metal case, and only the curl roller can be moved up and down. A sealing device for electrolytic capacitors with a drawing section.