JP2885259B2 - Electrolytic capacitor sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for an electrolytic capacitor, and more particularly to a sealing device for an electrolytic capacitor capable of finishing a sealing shape at a high speed and stably.

[0002]

2. Description of the Related Art Referring to an aluminum electrolytic capacitor as an example, as shown in FIG. 7, the electrolytic capacitor 1 has an aluminum bottomed cylindrical metal case 2 inside the metal case 2. A capacitor element 3 is formed by winding an anode foil and a cathode foil made of aluminum with a separator interposed therebetween, and then an electrolyte is injected.

In this case, a rubber sealing member 5 is attached to the lead terminals 4 a and 4 b extending from the capacitor element 3, and the rubber sealing member 5 is fitted so as to close the opening of the metal case 2.

After that, in order to improve the sealing performance, a horizontal drawing groove is formed in the outer peripheral surface of the metal case 2 by the horizontal member 6 so as to bite into the side surface of the rubber sealing member 5. Is caulked so that the opening edge of the metal case 2 curls inward.

In the actual manufacturing process, as shown in FIG. 8, a collet chuck 8 is used as a jig.
The collet chuck 8 is implanted on a turntable (not shown), and is carried to a sealing stage after gripping the metal case 2 of the electrolytic capacitor 1 in a product taking stage.

[0006] For example, Japanese Patent Application Laid-Open No.
As disclosed in U.S. Pat. No. 61,234, a spindle that moves up and down with respect to the collet chuck 8 is disposed, and the horizontal piece 6 and the upper piece 7 (see FIG. 7 ) are attached to the spindle.

When the collet chuck 8 reaches the closing stage with the rotation of the turntable, the spindle descends, and the horizontal piece 6 and the upper piece 7 are pressed against the outer peripheral surface and the opening edge of the metal case 2, respectively. Is rotated to perform a sealing operation with these pieces 6 and 7.

When this operation is completed, the spindle is retracted upward, and is conveyed toward the product take-out stage by the rotation of the turntable.

[0009]

However, in the above-mentioned conventional example, when the spindle is raised or lowered, the moving stroke thereof must be longer than the length of the lead terminals 4a and 4b. Productivity is not good.

In addition, it has been pointed out that since the horizontal piece 6 and the upper piece 7 are attached to the spindle, the mechanism is complicated and large, the inertia is large, and mechanical control tends to be unreasonable.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and its structural feature is that a collet chuck for releasably holding a metal case of an electrolytic capacitor is provided on a turntable. Rotatable
Attach and rotate the collet chuck above
Electrolytic condenser for caulking the opening of the metal case
The collet chuck is driven by the collet chuck
The gears are coaxially and integrally mounted,
The above collet chuck arrives due to the rotation of the table
The driven stage temporarily meshes with the driven gear
Drive gear to rotate the collet chuck
The collet chuck is rotated by a dynamic gear.
A horizontal drawing groove while contacting the outer peripheral surface of the metal case.
Abuts the horizontal piece formed and the opening edge of the metal case.
With an upper piece that caulks the opening edge
The retracting direction of the horizontal piece and the upper piece is
Direction perpendicular to the rotation axis of the chuck, and
Either the drive gear or the driven gear
Control means for keeping the rotation stop position of the
It is in being.

[0012] In this case, the control means includes the drive gear.
Alternatively, a through hole formed in the driven gear is used as the detection target.
Preferably, the optical sensor comprises a light sensor.

Further, soft rubber is provided on the outer peripheral surface of the drive gear.
It is preferable that an elastic ring such as
Is also one of the features of the present invention.

On the other hand, the driving gear may be driven by an index unit for controlling the operation timing of the sealing device.

[0015]

A driving gear for rotating the collet chuck, a horizontal piece for forming a horizontal drawing groove on the outer peripheral surface of the metal case, and an upper piece for caulking the opening edge of the metal case are individually arranged on the sealing stage. Therefore, the inertia of each operation unit is small, and the speed of the sealing operation can be increased.

Furthermore, since the collet chuck and the operation and timing of other mechanisms can be independently speed rotation, is Ru From Teisu sealing shape. In addition, the control means
The rotation stop position of the set chuck is always fixed.
After sealing, check the orientation of the lead terminals of each electrolytic capacitor.
And the subsequent work can be facilitated.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. For the structure of the electrolytic capacitor 1, the horizontal piece 6, and the upper piece 7 , see FIG.

As shown in FIGS. 1 and 2, this sealing device includes a turntable 10 which rotates intermittently at a predetermined rotation angle. In this example,
The turntable 10 is a product intake stage A → empty stage → sealing stage B → play stage C → empty stage →
It rotates in the order of product take-out stage D → empty stage → product take-in stage A.

On this turntable 10, a collet chuck 20 is rotatably implanted. In this example,
Twelve collet chucks 20 are evenly arranged at intervals of 30 °.

Each of the collet chucks 20 may be a known one. The structure of the collet chuck 20 will be briefly described. The collet chuck 20 includes a sleeve 21 rotatably held on the turntable 10 via a radial bearing. ing.

The sleeve 21 is slidably provided with a holding claw 22 including a plurality of holding pieces divided along the axial direction and a knock pin 23 for pushing up the holding claw 22. Have been.

A holding hole 24 for receiving the metal case 2 of the electrolytic capacitor 1 is provided at the center of the upper end of the holding claw 22, and the outer circumferential surface of the holding claw 22 and the corresponding inner circumferential surface of the sleeve 21 are provided. Is shaped like a mortar, and is formed with a taper for reducing the diameter of the holding claws 22 when the holding claws 22 descend. Also, the sleeve 21 and the knock pin 2
A coil spring 25 that biases the holding claw 22 downward, that is, in a direction in which the holding force is exerted, is interposed between the coil spring 25 and the coil spring 25.

A driven gear 26 is formed at a predetermined portion of the sleeve 21, in this embodiment, at a lower end thereof. On the other hand, at the position of the closing stage B, a driving gear 30 meshing with the driven gear 26 to rotate the collet chuck 20 is used.
Is provided.

As shown in FIG. 3, the driving gear 30 has a first bevel gear 3 mounted on a vertical rotating shaft 32 rotatably mounted on a gear table 31 via a radial bearing.
3 is attached.

On the gear table 31, a horizontal rotating shaft 35 having a second bevel gear 34 meshing with the first bevel gear 33 at one end is connected to the turntable 10 via a bearing member 35a.
The spur gear 36 is attached to the other end of the horizontal rotation shaft 35 as an intermediate gear.

The gear table 31 is slidably supported on guide rails 39, 40 via linear bush blocks 37, 38. The sliding direction is the radial direction of the turntable 10 like the horizontal rotation shaft 35.

A drive lever 42 for sliding the gear table 31 is provided. This drive lever 42
The center of the shaft is a rotation fulcrum, a cylindrical cam follower 43 is attached to one end, and a connecting shaft 44 extending from a driving source such as an air cylinder (not shown) is connected to the other end. The gear table 31 has a long hole 4
1 is drilled, and a cam follower 43
Are fitted.

Therefore, by rotating the drive lever 42, the gear table 31 reciprocates in the radial direction of the turntable 10, whereby the drive gear 30 is disengaged from the driven gear 26.

A stepping motor 45 is fixed on a base (not shown) of the apparatus at a position behind the gear table 31 when viewed from the turntable 10 side. The motor 45 has an output gear 46 that meshes with the intermediate gear 36. In this case, the intermediate gear 36 is
Has a thickness greater than the movement stroke of That is, the two gears 36 and 46 are always engaged even when the gear table 31 slides.

This device is provided with detection means for detecting the rotation stop position of the drive gear 30. In this example,
The detecting means comprises an optical sensor 48, and a through-hole 47 is formed in the drive gear 30 as an object to be detected.

The horizontal piece 6 and the upper piece 7 are also arranged on the sealing stage B. FIG. 4 is an exploded perspective view of the drive mechanism. In FIG. 1, the turntable 10 and the collet chuck 20 are omitted for the sake of drawing, and only the electrolytic capacitor 1 is shown for convenience of explanation.

At a predetermined height position on the turntable 10, that is, at a height position where a horizontal drawing groove is formed in the metal case 3, the horizontal piece 6 is provided with the arm 51 so that the horizontal piece 6 can contact and separate from the metal case 3. It is held on the free end side.

At the other end of the arm 51, a rotating shaft 52 is implanted. The rotary shaft 52 is inserted and held by a support arm 53 fixed to a base side of the apparatus (not shown), and a drive lever 54 connected to a drive source such as an air cylinder (not shown) is attached to the upper end thereof. Have been. As a result, the rotation of the drive lever 54 is
This is transmitted to the horizontal piece 6 via the arm 2 and the arm 51.

On the other hand, the upper block 7 is attached to the slide rail 61 a of the first linear guide 61 such that its rotation axis is orthogonal to the rotation axis of the collet chuck 20. In this case, the first linear guide 61 is horizontally arranged along the radial direction of the turntable 10.

Then, the first linear guide 61
It is slidably held in the vertical direction by the second linear guide 62. That is, the second linear guide 62 is fixed to the base side of the apparatus such that the sliding rail 62a is oriented vertically, and the first linear guide 61 is attached to the sliding rail 62a.

Sliding rail 61 of first linear guide 61
a has a cam groove 6 for driving the sliding rail 61a.
A cam follower 63 having 3a is provided, and a cylindrical cam 64 is fitted in the cam groove 63a. The cylindrical cam 64 has a lever 65 having a pivot point at the center.
And an operating shaft 66 extending from a driving source such as an air cylinder (not shown) is connected to the other end of the lever 65.

Similarly, the slide rail 62a of the second linear guide 62 is provided with a cam follower 67 having a cam groove 67a for driving the slide rail 62a. A cylindrical cam 68 is fitted. The cylindrical cam 68 is attached to one end of a lever 69 having a pivot point at the center, and an operating shaft extending from a driving source such as an air cylinder (not shown) is connected to the other end of the lever 69.

Therefore, the upper piece 7 slides horizontally by the rotation of the lever 65, and the upper piece 7 by the rotation of the lever 69.
Will move up and down.

According to the above configuration, in the product take-in stage A, the knock pin 2 of the collet chuck 20 is
3 is pushed up by a plate cam (not shown) or the like. As a result, the diameter of the holding hole 24 of the holding claw 22 is increased, and in this state, a product (the electrolytic capacitor 1 whose opening of the metal case 2 is not closed) can be removed from a shooter (not shown) as shown in FIG. It is dropped inside.

When the turntable 10 is sent to the sealing stage B by rotation, the pushing force of the knock pin 23 is released and the electrolytic capacitor 1 is biased by the coil spring 25.
Are firmly held by the holding claws 22.

Upon arrival at the closing stage B, the lever 42 is rotated clockwise in FIG. 3 by a driving source (not shown), whereby the gear table 31 advances and the driving gear 30 meshes with the driven gear 26.

Then, the stepping motor 45 is started, and the product 1 rotates together with the collet chuck 20 by the rotational force. The rotation speed at this time is set arbitrarily irrespective of other mechanisms.

At about the same time, when the lever 54 rotates counterclockwise in FIG. 4, the horizontal piece 6 is pressed against the outer peripheral surface of the metal case 2, and a horizontal drawing groove is formed at that position.

As for the upper piece 7, first, the lever 65 is rotated counterclockwise in FIG.
a moves forward, and as a result, the upper piece 7 is positioned on the opening edge of the metal case 2. Next, the slide rail 62a is lowered by the counterclockwise rotation of the lever 69 in the figure, and the upper piece 7 applies a predetermined pressing force to the opening edge of the metal case 2 while turning the opening edge inward. Curl while curling.

The time required for the sealing operation, the rotational speed and the metal case 2, but Ru is set in consideration of factors such as the pressing force of Yokokoma 6 and Kamikoma 7, in this embodiment, the drive gear 30 Is counted by the optical sensor 48,
They are always stopped at a fixed position. This means that the directions of the lead terminals 4a and 4b can be aligned for each product, and the post-operation can be facilitated.

When the closing is completed, each of the levers 42, 54 and 69 rotates in the opposite direction to the above, and the drive gear 3
0, each of the horizontal piece 6 and the upper piece 7 retreat to the retreat position, and wait for the next sealing operation.

FIG. 5 shows a modified embodiment of the driving means for rotating the collet chuck 20 via the driven gear 26. According to this, first, the motor 45 has its output shaft 4
5a is held on the base of the apparatus via a support member (not shown) so as to face vertically.

An output gear 46 is attached to the output shaft 45a so as to rotate integrally therewith. In this case, one end of a prismatic arm 71 having a predetermined length is attached to the output shaft 45a. Is rotatably mounted.

That is, a bearing hole 71a is formed at one end of the arm 71 so as to be fitted to the output shaft 45a. The arm 71 is rotatable in the horizontal direction on the output shaft 45a through the bearing hole 71a. Will be retained.

At the other end of the arm 71, a drive roller 72 for rotating the driven gear 26 is provided. in this case,
The drive roller 72 is disposed above the arm 71,
An intermediate gear 73 that is integrally attached to the rotation shaft of the drive roller 72 is disposed below the arm 71.

This intermediate gear 73 is connected to the output gear 46 by a toothed belt 74, so that the drive roller 72 is operatively connected to the motor 45 via the intermediate gear 73, its toothed belt 74 and the output gear 46. Linked to

The other end of the arm 71 is connected to driving means such as an air cylinder (not shown).
A lever 75 for reciprocating rotation of the driven gear 26 is attached, so that the driving roller 72 selectively contacts the driven gear 26.

Although the driven gear 26 is a spur gear, an elastic ring 72a made of, for example, a soft rubber is fitted around the outer periphery of the driving roller 72.
Is getting better.

In this example, a hole 26a for detecting a rotation stop position is provided on the gear surface of the driven gear 26, and the optical sensor 48
The hole 26a is directly detected by the device to improve the positioning accuracy.

According to this modified embodiment, the drive mechanism of the driven gear 26 can be simplified, which is advantageous in terms of cost and also improves the workability of assembly. Instead of attaching the arm 71 to the output shaft 45a of the motor 45, a separate rotation support shaft may be prepared and rotatably attached thereto.

FIG. 6 shows another embodiment of the driving means for rotating the collet chuck 20 via the driven gear 26. According to this, the index unit 80 of the sealing device is used as a driving source. The index unit 80 includes a turntable 10, a horizontal piece 6
It is a device for determining the operation timing of each unit of the device such as the upper piece 7 with high accuracy, and includes an intermittent rotation gear 81 with high stop position accuracy for driving the drive gear 82.

The drive gear 82 is provided on the free end side of the swingable support arm 71 as in the previous embodiment, whereas the intermittent rotating gear 8 is provided on the base side of the support arm 71.
An intermediate gear 83 meshing with 1 is attached. The drive gear 82 and the intermediate gear 83 are connected by a timing belt 84.

A lever 75 is connected to the free end of the support arm 71 as in the previous embodiment, and the support arm 71 swings via the lever 75, whereby the drive gear 82 is driven by the driven gear. 26 intermittently. In this embodiment, the teeth of the drive gear 82 are formed of a hard resin.

When the driven gear 26 of the collet chuck 20 reaches the sealing stage with the rotation of the turntable 10, the support arm 71 is rotated clockwise in FIG. Is engaged with.

At the same time, the intermittent rotating gear 81 starts rotating, and the driven gear 26 is rotated via the intermediate gear 83, the timing belt 84 and the driving gear 82. In this case, the number of rotations is controlled very accurately, for example, within 8 rotations +1 degree, so that there is no possibility that the directions of the lead terminals 4a and 4b become out of order when the rotation is stopped.

After a predetermined number of rotations, the intermittent rotation gear 81
Is stopped, and the support arm 7 is
1 is rotated in the counterclockwise direction in the figure, the drive gear 82 is separated from the driven gear 26, and the next driven gear 26 of the collet chuck 20 is waited.

As described above, by using the index unit 80 of the apparatus itself as a driving source, high-precision mechanical control can be performed, and electric control means and the like become unnecessary.

[0063]

As described above, according to the present invention,
Since the moving stroke of the drive gear, the horizontal piece and the upper piece is small, and the inertia acting on each member is small, it is possible to greatly reduce the sealing work time.

Further, since the number of revolutions can be increased,
The sealing shape can be stabilized . In addition,
The rotation stop position of the chuck is always fixed.
After sealing, check the orientation of the lead terminals of each electrolytic capacitor.
This makes it possible to obtain the same effect as that of the first embodiment, which facilitates later work .

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a sealing device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement of a turntable and each stage.

FIG. 3 is an exploded perspective view showing a drive system of a drive gear.

FIG. 4 is an exploded perspective view showing each drive system of a horizontal piece and an upper piece.

FIG. 5 is an exploded perspective view showing a modified example of the driving means of the driven gear.

FIG. 6 is a schematic view showing another modified embodiment of the driving means of the driven gear.

FIG. 7 is a cross-sectional view illustrating an electrolytic capacitor that performs sealing.

FIG. 8 is a schematic diagram for explaining a conventional example.

[Explanation of symbols]

 Reference Signs List 6 horizontal piece 7 upper piece 10 turntable 20 collet chuck 26 driven gear 30, 82 drive gear 31 gear table 42 lever 45 stepping motor 61, 62 linear guide 71 support arm 80 index unit 81 intermittent rotating gear 83 intermediate gear 84 timing belt

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuhiro Ito 2-2-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa Inside Erner Co., Ltd. (56) References JP-A-63-15410 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) H01G 13/00 321 H01G 9/10

Claims (4)

(57) [Claims] 1. A collet chuck for releasably holding a metal case of an electrolytic capacitor is rotatably attached to a turntable , and the collet chuck is rotated.
While closing the opening side of the metal case
In the sealing device of the dissolving capacitor, a driven gear is coaxially and integrally formed on the collet chuck.
It is attached, and by the rotation of the turntable above
On the sealing stage side where the collet chuck comes,
The collet chuck temporarily meshes with the driven gear.
Drive gear for rotating the
While the chuck is rotating,
A horizontal piece that abuts on the outer peripheral surface to form a horizontal drawing groove and the above gold
Above the opening edge of the metal case and caulking the opening edge
And a piece, and the horizontal piece and the upper
The retreat direction of the piece is orthogonal to the rotation axis of the collet chuck.
And the driving gear or the driven
The rotation stop position is always constant for one of the gears
A sealing device for an electrolytic capacitor, further comprising control means for setting a position . 2. The control means according to claim 1, wherein
An optical sensor having a through hole formed in the driven gear as a detection object.
Sealing apparatus of the electrolytic capacitor according to claim 1, characterized in that it consists of Sir. 3. An outer peripheral surface of the driving gear is made of soft rubber or the like.
3. The sealing device for an electrolytic capacitor according to claim 1, wherein said elastic ring is fitted . 4. The operating gear of the sealing device according to claim 4 , wherein
Driven by an index unit that controls
Sealing apparatus of the electrolytic capacitor according to claim 1, 2 or 3, characterized in that.