JP2001068389A - Automatic sealing apparatus of electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy conformation of a capacitor, when a plurality of capacitor case grip units having accommodation chamber of inner diameters corresponding to various outer diameter dimensions of capacitor cases are previously prepared and when the outer diameter dimension of the capacitor case to be produced is changed, only by selecting and exchanging the conforming capacitor case grip unit. SOLUTION: A plurality of types of capacitor case grip units are previously prepared as capacitor case grip units 3 each made of a combination of a housing 33, a chuck holder 32 having taper hole 32a formed therein, an accommodation chamber 34a having the same inner diameter dimension as the outer diameter of the capacitor case 4, and a chuck 34 formed with a taper part 34e fitting to the taper hole 32a for grasping the case 4 by enlarging or reducing the inner diameter of the chamber 34a. When the outer diameter dimension of the case is changed, the capacitor case grip unit 3 can be wholly exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sealing (curling) device for an electrolytic capacitor, and more particularly to a plurality of capacitor case gripping units in which the inside diameter of a storage chamber is formed according to various outside diameters of a capacitor case. If the outer diameter of the produced capacitor case is changed in advance, a large-scale mechanism can be obtained simply by selecting and replacing the matching capacitor case gripping unit from a plurality of capacitor case gripping units. Without the need for replacement work or subtle adjustments, even inexperienced people can easily handle various sizes of electrolytic capacitors, greatly reducing the setup time and man-hours required for changing the dimensions of products. To an automatic sealing device for an electrolytic capacitor.

[0002]

2. Description of the Related Art An electrolytic capacitor is obtained by impregnating an electrolytic capacitor element with an electrolytic solution and inserting a sealing material into a lead wire.
It is manufactured by being enclosed in a capacitor case. The sealing operation of the electrolytic capacitor element is performed by drawing while holding and rotating the capacitor case.

On the other hand, the dimensions of the capacitor case need to be of various sizes based on the capacity of the capacitor. Conventionally, a capacitor case of a different size is gripped by an automatic sealing device specially adjusted to the size of the capacitor case. Each time the capacity of the electrolytic capacitor to be produced is different, the mechanism of the automatic sealing device is replaced on a large scale, or each part of the complicated automatic sealing device is adjusted according to the size of the capacitor case. Therefore, a large amount of time is required for the setup time and man-hour required for changing the dimensions of the product, and this has been a major factor in lowering the production efficiency.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a device for holding a capacitor case by using a housing and a housing. A chuck holder movably fitted with a tapered hole, a storage chamber having the same inner diameter as the outer diameter of the capacitor case, and a tapered portion fitted with the tapered hole formed to enlarge or expand the inner diameter of the storage chamber. By changing the size of the capacitor case into a unit by combining the chuck that holds the capacitor case with the chuck that reduces the size of the capacitor case, it is very easy to change the size of the capacitor case and change the size. Is to be able to respond to

Another object is to prepare a plurality of types of capacitor case gripping units including a housing, a chuck holder and a chuck in advance according to the outer diameter of the capacitor case, and change the outer diameter of the capacitor case. In such a case, by selecting a capacitor case gripping unit suitable for the outer diameter of the capacitor case and enabling the entire capacitor case gripping unit to be replaced, the automatic sealing of the electrolytic capacitor accompanying the size change of the capacitor case is performed. Eliminates the need to replace large-scale mechanical parts of the equipment and complicated adjustments of each part, greatly improving productivity by enabling unskilled workers to easily and quickly deal with electrolytic capacitors of various sizes. That is.

[0006]

According to the present invention (claim 1), a tapered hole which gradually expands toward an open end is formed at one end, and a driven gear which meshes with a drive gear is formed at the other end. A chuck holder, a housing rotatably supporting the chuck holder, and an outer diameter portion formed in a tapered shape to fit into the tapered hole of the chuck holder, and an inner diameter portion having the same inner diameter as the outer diameter of the capacitor case. A storage chamber is provided and is formed in a cylindrical shape, and a slit is provided in the axial direction, and the inner diameter of the storage chamber is expanded or expanded by the action of the tapered hole by moving in the axial direction in the chuck holder. A chuck for holding the capacitor case by reducing the size of the capacitor case.

Further, according to the present invention (claim 2), the upper and lower portions of the sealing material into which the lead wires of the electrolytic capacitor element are inserted are pressed by pressing the outer surface of the rotating and rotating capacitor case, and the sealing is performed. A chucking device in which a forming device that is in close contact with the material, a tapered hole that gradually expands toward the open end is formed at one end, and a driven gear that meshes with the driving gear is formed at the other end, and the chuck holder is rotatable. The housing and the outer diameter portion are formed in a tapered shape to fit into the tapered hole of the chuck holder, and the inner diameter portion is formed in a cylindrical shape with a storage chamber having the same inner diameter size as the outer diameter of the capacitor case. In addition, a slit is provided in the axial direction, and the inner diameter of the storage chamber is enlarged or reduced by the action of the tapered hole by moving in the axial direction in the chuck holder. A capacitor case gripping unit comprising a chuck for gripping the capacitor case, and a plurality of capacitor case gripping units each having an inner diameter of the storage chamber corresponding to the plurality of capacitor cases having different outer diameters. When the outer diameter of the capacitor case to be prepared and gripped in advance is changed, the configuration can be dealt with by replacing the capacitor case gripping unit that matches the outer diameter of the capacitor case together with the capacitor case gripping unit. It is characterized by having done.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. 1 and 2, an automatic sealing device 1 for an electrolytic capacitor according to the present invention includes a molding device 2 and a capacitor case holding unit 3.

The molding device 2 presses the outer surface 4a and the upper end 4b of the capacitor case 4 to perform drawing and closes the sealing material 5 for sealing. And a part forming device 8.
The outline of the processing steps of the capacitor case 4 will be described below. After the electrolytic capacitor element 7 is impregnated with an electrolytic solution, the sealing material 5 is inserted through the lead wire 7a and inserted into the capacitor case 4 (FIG. 3 (a)). )), Then the side molding device 6
Is pressed against an outer portion 4a of the capacitor case 4 to draw a lower portion of a sealing material (sealing rubber) 5 and to form an upper end portion 4b.
Is bent inward at an angle of 45 ° (FIG. 3B),
Further, the upper end 4b bent at 45 ° is brought into close contact with the sealing material 5 and sealed by the upper end forming device 8 to manufacture the electrolytic capacitor 17.

In FIG. 1 and FIG. 4, the side forming apparatus 6 has a forming roller 9 pivotally attached to a bracket 10 so as to be rotatable in the direction of arrow A. The bracket 10 is provided with a mounting hole 10b formed in a base 10a. And the U-shaped groove 10c is fitted to the positioning pin 12 and the handle-fixing screw 13 disposed on the support base 11, respectively, and is oscillated about the positioning pin 12 to adjust the position of the forming roller 9. The fixing screw 13 with the handle is tightened to be fixed at a predetermined position.

A groove 9a having a width corresponding to the thickness of the sealing material 5 is formed on the outer periphery of the forming roller 9, and a semicircular convex portion 9b is formed below the groove 9a. An inclined surface 9c having an angle of 45 ° is formed on the upper part, and can be drawn by being pressed against the capacitor case 4.

An L-shaped block 15 to which the bracket 10 is fixed by screws 14 is provided with a groove 1 formed in a movable base 16.
The dovetail groove 16 a formed in the movable base 16 is slidably fitted in the guide block 18.

A connecting rod 19 is attached to the movable base 16, and a driving device (not shown) connected to the connecting rod 19 is operated to move the movable base 16 to the guide block 18.
The molding roller 9 is slid along the
Is pressed.

The upper end forming device 8 is shown in FIGS.
, The movable base 2 fitted to the guide block 21 fixed to the base 20 and movable in the direction of arrow C or D
2 is provided with a pin 23, and a bell crank 24 is fitted to the pin 23 so as to be rotatable in the direction of arrow G or H.

A connecting rod 25 is provided at one end 24a of the bell crank 24 so as to extend in the direction of arrow E or F.
a of the other end 24b
, A roller holder 28 is fixed by screws 29.

A fixing hole 28a provided with a slit 28b is formed in the roller holder 28 in a horizontal direction.
The pressing roller shaft 30 is inserted into the fixing hole 28a and the screw 3
1, and a pressing roller 31 is further rotatably mounted at the tip of the pressing roller shaft 30.

When the driving device 26 is operated in the direction of arrow E to rotate the bell crank 24 in the direction of arrow G to supply the capacitor case 4 to the capacitor case gripping unit 3, the pressing roller 31 causes an obstacle. The movable table 22 is retracted to a position where
Is moved in the direction of the arrow C or D to press the pressing roller 31 against the upper end 4 b of the capacitor case 4 so as to be in close contact with the sealing material 5.

The capacitor case holding unit 3 is for holding and rotating the capacitor case 4 so that drawing can be performed. In FIGS. 1, 7, 9 and 13, a chuck holder is used. 32, a housing 33, and a chuck 34.

The chuck holder 32 is formed in a cylindrical shape with a tapered hole 32a gradually expanding at one end toward the open end, and a driven gear 32b provided at the other end. Reference numeral 32b meshes with a drive gear 35 rotatably disposed on the base 20, and the drive gear 35 is connected to a drive device 39 such as a motor via gears 36 and 38.
, And drives the driving device 39 to operate the gears 38,
The driven gear 32b, that is, the chuck holder 32, is rotated in the direction of the arrow M by rotating the drive gear 36 and the drive gear 35 in the directions of the arrows I, J, and K, respectively.

The housing 33 is for holding the chuck holder 32 in a freely rotatable manner, and is formed in a cylindrical shape, and a bearing 40 is disposed in the inner diameter portion to rotatably support the chuck holder 32. are doing.

The chuck 34 is for holding the capacitor case 4 and has an outer diameter portion of the chuck holder 3.
The inner diameter portion is formed in a bottomed cylindrical shape with a storage chamber 34a having the same inner diameter size as the outer diameter of the capacitor case 4 formed in the tapered portion 34e fitted into the second tapered hole 32a. Is provided with a plurality of slits 34b in the axial direction to impart elasticity.

A female screw 34d is provided at the center of the bottom portion 34c. When the chuck 34 is inserted into the chuck holder 32, the operating rod 41 having a flange 41a is screwed and fixed to the female screw 34d from below. A coil spring 42 is mounted between the flange 41a and the chuck holder 32, and urges the chuck 34 to always be drawn into the tapered hole 32a.

The operating rod 41 is provided with a through hole 41b, and a vertically movable push rod 47 is provided to penetrate into the storage chamber 34a. A movable pressing plate 43 is provided, and the operating plate 41, that is, the chuck 34 is raised by moving the pressing plate 43 upward to oppose the force of the coil spring 42, so that the storage chamber is provided. It is configured to enlarge the inner diameter of 34a.

In FIG. 7, the capacitor case gripping unit 3 in which the housing 33, the chuck holder 32 and the chuck 34 are assembled in a triple structure is
A slit 43a for tightening is formed and inserted into the gripping unit chamber 43 provided on the base 20, and the handle 43 is tightened to narrow the slit 43a to tighten the capacitor. The case holding unit 3 is firmly fixed.

The present invention is configured as described above,
Hereinafter, the operation will be described. 6, the movable base 22 is moved in the direction of arrow C, and the driving device 26 is operated to raise the connecting rod 25 in the direction of arrow E, thereby rotating the bell crank 24 in the direction of arrow G and pressing the roller 31. Is separated from the capacitor case holding unit 3 and retracted to a position where it does not hinder the supply of the capacitor case 4 to the capacitor case holding unit 3.

In FIG. 8, when the pressing plate 43 is moved upward to raise the operating rod 41 against the force of the coil spring 42, the chuck 34 screwed to the operating rod 41 is also raised,
The tapered portion 34e is a tapered hole 32a of the chuck holder 32.
And the inner diameter of the storage chamber 34a is enlarged.

Here, when the capacitor case 4 in which the electrolytic capacitor element 7 in which the sealing material 5 is inserted through the lead wire 7a is supplied into the storage chamber 34a, the inner diameter of the storage chamber 34a is enlarged. The capacitor case 4 can be inserted into the storage chamber 34a without any trouble.

When the pressing plate 43 is lowered, the coil spring 4
The chuck 34 is pulled into the chuck holder 32 by the force of 2 and the chuck 34 is
a, the inner diameter of the storage chamber 34a is reduced, and the capacitor case 4 is firmly gripped integrally with the chuck holder 32 and the chuck 34.

In FIG. 10 to FIG.
When the gears 38 and 36 and the drive gear 35 are rotated in the directions of arrows I, J and K, respectively, the driven gear 32b meshing with the drive gear 35, that is, the chuck holder 32 also rotates in the direction of the arrow M. The capacitor case 4 held integrally with the chuck holder 32 also rotates in the direction of arrow M.

In FIG. 10 and FIG.
Is moved in the direction of arrow B and pressed against the outer portion 4a of the capacitor case 4 which rotates in the direction of arrow M.
Performs a drawing process on the capacitor case 4 while rotating in the direction of the arrow A to reduce the diameter of the lower outer portion 4a of the sealing material 5 and to bend the upper end 4b at an angle of 45 °.

In FIG. 12, when the driving device 26 is operated to lower the connecting rod 25 in the direction of arrow F, the bell crank 24 rotates in the direction of arrow H, and the pressing roller 31 is rotated.
Are located above the capacitor case 4 held by the capacitor case holding unit 3.

When the movable table 22 is lowered in the direction of arrow D, the pressing roller 31 moves together with the roller holder 28 in the direction of arrow D.
The electrolytic capacitor element 7 is lowered in the direction, contacts the upper end 4 b formed at an angle of 45 °, is further bent, and is brought into close contact with the sealing material 5 to enclose the electrolytic capacitor element 7 in the capacitor case 4.

When the pressing plate 43 is moved upward again to raise the operating rod 41 and the chuck 34 against the force of the coil spring 42, the tapered portion 34e is separated from the tapered hole 32a of the chuck holder 32 and the storage chamber. Since the inner diameter of the capacitor case 34a is enlarged and the holding of the capacitor case 4 by the chuck 34 is released, the pushing rod 47 is moved upward to push the capacitor case 4 out of the chuck 34, and the capacitor case 4 to be processed next is stored in the storage chamber. 34a.

As described above, the capacitor cases 4 into which the electrolytic capacitor elements 7 are inserted one after another can be supplied into the storage chamber 34a, gripped, and sealed.

When the outer diameter of the capacitor case 4 is changed to a smaller outer diameter as shown in FIG. 9, for example, the handle screw 44 is loosened in FIG. The capacitor case gripping unit 3 is pulled out upward and removed, and a plurality of capacitor case gripping units 3 that are prepared in advance according to the outer diameter of the capacitor case 4 are used. The one that matches the diameter is selected and inserted into the holding unit chamber 43, the handle screw 44 is tightened to narrow the slit 43a, and the capacitor case holding unit 3 is firmly fixed.

Also, depending on the length of the capacitor case 4, the outer portion 4a of the capacitor case 4 and the forming roller 9
It is also possible to insert a spacer 45 smaller than the inner diameter of the storage chamber 34a into the storage chamber 34a so that the positions in the height direction coincide with each other.

As described above, the operation of changing the electrolytic capacitor automatic sealing device 1 in accordance with the change of the capacitor case 4 is only the operation of exchanging the capacitor case gripping unit 3, and no complicated adjustment is required at all and in a very short time. Be able to respond to changes.

[0038]

As described above, the present invention provides a housing for holding a capacitor case as described above, a chuck holder rotatably fitted to the housing and having a tapered hole, and an inner diameter equal to the outer diameter of the capacitor case. Since the storage chamber having dimensions and a taper portion that fits into the tapered hole are formed, and the inner diameter of the storage chamber is enlarged or reduced, a chuck for gripping the capacitor case is assembled as a unit to form a capacitor case gripping unit. In addition, when the size of the capacitor case is changed, it is possible to exchange the capacitor case gripping unit so that the size change can be very easily handled.

A plurality of types of capacitor case gripping units each including a housing, a chuck holder, and a chuck are prepared in advance according to the outer diameter of the capacitor case, and when the outer diameter of the capacitor case is changed, a capacitor is provided. A large-scale mechanism of an automatic electrolytic capacitor sealing device accompanying a change in the size of a capacitor case because a capacitor case gripping unit that matches the outer diameter of the case is selected and the entire capacitor case gripping unit can be replaced. It is possible to eliminate the need for replacement of parts and complicated adjustments of each part, and it is possible for an unskilled person to respond to electrolytic capacitors of various sizes extremely easily and in a short time, so that there is an effect that productivity can be greatly improved. .

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional front view of an automatic sealing device for an electrolytic capacitor.

FIG. 2 is a side view of the automatic sealing device.

FIG. 3 is a perspective view showing a processing step of sealing a capacitor case.

FIG. 4 is a perspective view of a side molding device.

FIG. 5 is a partially broken perspective view of the upper end forming device.

FIG. 6 is a side view showing the movement of the upper end forming device.

FIG. 7 is a perspective view showing a detached state of the capacitor case gripping unit.

FIG. 8 is a partially cutaway perspective view showing a mutual relationship among a capacitor case gripping unit, a spacer, and an electrolytic capacitor for a thick capacitor case.

FIG. 9 is a perspective view showing a mutual relationship among a capacitor case gripping unit, a spacer, and an electrolytic capacitor for a thin capacitor case.

FIG. 10 is a longitudinal sectional view showing a state immediately before processing in which an electrolytic capacitor element having a sealing material inserted through a lead wire is inserted into a capacitor case.

FIG. 11 is a longitudinal sectional view showing a state where a forming roller is pressed against a capacitor case and a side portion and an upper end portion are drawn.

FIG. 12 is a longitudinal sectional view showing a state in which the upper end portion is brought into close contact with a sealing material by a pressing roller of the upper end forming device.

FIG. 13 is a schematic perspective view showing a use state of the automatic sealing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic electrolytic capacitor sealing device 2 Molding device 3 Capacitor case holding unit 4 Capacitor case 4a Outside part 5 Sealing material 7 Electrolytic capacitor element 7a Lead wire 32 Chuck holder 32a Taper hole 32b Driven gear 33 Housing 34 Chuck 34a Storage chamber 34b Slit 35 Drive gear

Claims (2)

[Claims] 1. A chuck holder having a tapered hole that gradually widens toward an open end formed at one end and a driven gear that meshes with a drive gear at another end, and rotatably supports the chuck holder. And a storage chamber having an outer diameter portion formed in a tapered shape to fit into the tapered hole of the chuck holder, and an inner diameter portion having the same inner diameter size as the outer diameter of the capacitor case. And a chuck that is provided with a slit in the axial direction and moves in the axial direction in the chuck holder to expand or reduce the inner diameter of the storage chamber by the action of the tapered hole to grip the capacitor case. A capacitor case gripping unit characterized by the above-mentioned. 2. A molding device for pressing an outer surface of a capacitor case that is gripped and rotated to draw upper and lower portions of a sealing material into which a lead wire of an electrolytic capacitor element is inserted, and to closely contact the sealing material, A chuck holder in which a tapered hole gradually expanding toward the open end is formed at one end and a driven gear meshing with the drive gear is formed at the other end, a housing for rotatably supporting the chuck holder, and an outer diameter portion Is provided with a storage chamber having a tapered shape that fits into the tapered hole of the chuck holder and an inner diameter portion having the same inner diameter size as the outer diameter of the capacitor case, is formed in a cylindrical shape, and is slit in the axial direction. Is provided, and the inner diameter of the storage chamber is enlarged or reduced by the action of the tapered hole by moving in the axial direction in the chuck holder to hold the capacitor case. And a capacitor case gripping unit comprising a chuck to be held, and a plurality of capacitor case gripping units in which the inner diameters of the storage chambers are respectively formed corresponding to the plurality of capacitor cases having different outer diameters are prepared in advance. When the outer diameter of the capacitor case to be gripped is changed, the capacitor case gripping unit adapted to the outer diameter of the capacitor case can be replaced by replacing the entire capacitor case gripping unit. Automatic sealing device for electrolytic capacitors.