JPH1048253A - Electrode unit for measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode unit in which contaminants can be removed from the lead wires of an electronic element. SOLUTION: Lead wires 3, 4 of an electrolytic capacitor 2 are mounted on the surface and the rear of a separator 5 comprising an insulating glass epoxy board. A cam follower 28 is guided through rotation of a cam plate 29 and the forward ends 7a of a pair of vertical arms 7 approach toward respective lead wires 3, 4. The electrode contact 22 of a measuring electrode 12 supported by a fulcrum block 9 on the forward end 7a of the arm 7 rotatably through an electrode supporting shaft 14 slides on the lead wires 3, 4 to remove contaminants therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode device for measurement used in an apparatus for measuring characteristics after aging processing of an electronic component by sandwiching a lead wire of the electronic component.

[0002]

2. Description of the Related Art Conventionally, in a manufacturing process of an electrolytic capacitor, an aging process is performed to stabilize the characteristics of the electrolytic capacitor. -550
One disclosed in Japanese Patent No. 77 is known. In this electrode device for measurement, as shown in FIG. 6, an insulating substrate 107 is sandwiched between two lead wires 110 of an electrolytic capacitor element 109, and a pair of arms 111 which are separated from and close to the lead wires 110. And the lead wire 1
Coil springs 113 that can be electrically contacted with 10 are respectively attached to the distal ends of the arms 111, and the coil springs 113 press the lead wires 110 and contact the lead wires 110 of the electrolytic capacitor 109. In this state, charging, discharging, and characteristic measurement of the electrolytic capacitor 109 are performed.

[0003]

However, in the measuring electrode device shown in FIG. 6, since the coil spring 113 is in contact with the lead wire 110 of the electrolytic capacitor 109 to conduct electricity, dirt or the like adheres to the lead wire 110. Or the surface of the lead wire 110 is oxidized to form an oxide film, the contact resistance between the coil spring 113 and the lead wire 110 increases, and no conduction occurs between the coil spring 113 and the lead wire 110. In some cases, even when conduction occurs, only a current lower than a specified value is conducted due to the contact resistance. In this case, there is a problem that the measurement accuracy is reduced.

Accordingly, an object of the present invention is to provide a measuring electrode device capable of removing dirt and the like adhering to a lead wire of an electronic component when the electrode comes into contact with the lead wire.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a measuring electrode device for mounting a lead wire on which a lead wire of an electronic element is mounted, and the lead wire. An arm member that moves away and close to the lead wire mounted on the mounting portion, an electrode member held by the arm member, and the electrode member mounted on the lead wire mounting portion. Electrode sliding means for contacting and sliding the lead wire.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the lead wire mounting portion is made of an insulating plate material, and the arm member is A pair of electrode sliding means is provided at a symmetrical position with respect to the lead wire mounting portion, and the electrode sliding means is an electrode shaft supporting portion provided at a tip end portion of the arm member and rotatably supporting the electrode member. It is characterized by having.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, a cam follower is provided at a base of each of the pair of arm members. The member is each supported on the main body frame by an arm supporting portion provided between the cam follower and the distal end portion, and the cam follower moves the distal end portion of the arm member to the lead wire mounting portion. It is characterized by being guided by a cam provided on a main body frame for opening and closing operation.

According to the first aspect of the present invention, the lead wire of the electronic element is mounted on a lead wire mounting portion, and the arm member is mounted on the lead wire mounting portion. The electrode member held by the arm member is pressed against the lead wire placed on the lead wire placing portion and slidably contacts the lead wire by the electrode sliding means. This contact sliding removes dirt, oxide film, and the like attached to the surface of the lead wire. In this state, measurement of electrical characteristics and the like are performed, and thereafter, the arm member is separated from the lead wire.

Further, in the measuring electrode device according to the present invention, the lead wires of the electronic element are mounted on the front and back surfaces of the lead wire mounting portion made of an insulating plate, respectively, and Of the arm member each sandwiches the lead wire between the plate member and the electrode member provided at the tip of the arm member. At this time, an electrode shaft support provided at the tip of the arm member as electrode sliding means With the rotation axis as the axis, the electrode member tries to rotate in the direction away from the lead wire with respect to the arm member, but since the tip end of the arm member moves further in the direction of the lead wire, Eventually, the electrode member slides on the surface of the lead wire. This operation removes dirt, oxide film, and the like attached to the surface of the lead wire. In this state, measurement of electrical characteristics and the like are performed. Thereafter, when the arm member is separated from the lead wire by a predetermined distance, the electrode member is separated from the lead wire.

Further, according to the third aspect of the present invention, the cam followers provided at the bases of the pair of arms are moved outward by the rotation of the cam provided on the main body frame. The arm member is moved in a direction in which the distal end portion approaches the lead wire with the arm shaft supporting portion as the center of rotation. By this operation, each of the arm members sandwiches the lead wire between the plate member and the electrode member provided at the distal end thereof. At this time, the arm member is provided at the distal end of the arm member as electrode sliding means. The electrode member tries to rotate in a direction away from the lead wire with respect to the arm member, with the electrode shaft support portion being the rotation axis, but the tip of the arm member further moves in the lead member direction. The electrode member slides on the surface of the lead wire so as to remove dirt and oxide film. Then, by rotating the cam, each arm member is moved in a direction in which the distal end is separated from the lead wire with the arm shaft supporting portion as the rotation center, and after the arm member is separated from the lead wire by a predetermined distance, the electrode member is moved. Is separated from the lead wire.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A measuring electrode device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a measuring electrode device according to an embodiment of the present invention, and FIG. 2 is a right side view of the measuring electrode device.

In this embodiment, a case will be described in which the measuring electrode device 1 is used for an aging inspection machine for an electrolytic capacitor. In the final stage of the manufacturing process of the electrolytic capacitor, in order to complete the anodized film of the assembled electrolytic capacitor, the DC voltage is gradually increased from 0 V at the highest use temperature of the electrolytic capacitor or higher, After reaching the aging voltage determined by the design of the electrolytic capacitor, an aging process for keeping the aging voltage constant is performed.

The measuring electrode device 1 of the present embodiment is used for an aging inspection machine (not shown) used for the aging process. Since the entire configuration of the aging inspection machine itself is not directly related to the measurement electrode device 1 of the present embodiment, the description is omitted here, and the measurement electrode device 1 will be described in detail.

As shown in FIG. 1, an anode lead 3 and a cathode lead 4 which are inserted between an anode lead 3 and a cathode lead 4 of an electrolytic capacitor 2 are placed on a measuring electrode device 1. A separator plate 5 extends horizontally from the center of the right end face of the frame 6. This separator plate 5
Is made of a glass epoxy substrate and has a sufficient insulating property.

On the right side of the frame 6, a pair of upper and lower support shafts 8 that support the pair of upper and lower arms 7 are provided symmetrically with respect to the separator plate 5. The arm 7 is supported by the support shaft 8 and pivots up and down.

Next, the arm 7 will be described. Arm 7
Are provided in a pair of upper and lower positions symmetrically with respect to the separator plate 5 and have a symmetrical configuration, so that the upper arm 7 will be described here.

The arm 7 is rotatably supported at a substantially central portion thereof by the support shaft 8. The tip 7a of the arm 7 is formed in a plate shape, and a fulcrum block 9 is screwed on the tip 7a. It is fixed by. The fulcrum block 9 is provided with a screw hole 11 for a screw 10 for fixing the fulcrum block 9 to the distal end portion 7a of the arm 7, as shown in the perspective view of FIG. On both side surfaces, fitting surfaces 13 on which measurement electrodes 12 to be described later are rotatably fitted are formed at symmetrical positions, respectively.
The electrode support shaft 14 for supporting the measurement electrode 12
(See FIG. 1).
The electrode support shaft 14 is provided on the left end surface of the fulcrum block 9.
A screw hole 17 for a fixing screw 16 for fixing the screw is formed.

As shown in FIG. 1, a measurement electrode 12 is rotatably supported by an electrode support shaft 14 on the fulcrum block 9. As shown in the perspective view of FIG. 4, the measurement electrode 12 is a conductive metal member having a substantially L-shaped side surface, and a counterbore hole in which the pressing spring 18 shown in FIG. 19 and screw holes 21 for the electrode wire mounting screws 20 shown in FIG. 1 are respectively formed. Also,
The right end face of the measuring electrode 12 is extended in a plane, and an electrode contact 22 made of an aluminum alloy is fixed to the lower end by silver brazing. A pair of front and rear mounting portions 23 are provided at the left end of the measurement electrode 12 so as to be rotatably fitted to the fitting surface 13 of the fulcrum block 9, and the electrode support shaft 14 passes through each mounting portion 23. Each of the through holes 24 is formed.

As shown in FIG. 1, the measuring electrode 12 is connected to the fitting surface 1 of the fulcrum block 9 by an electrode support shaft 14.
3 rotatably supported. The electrode support shaft 14 is fixed by a fixing screw 16 to prevent the electrode support shaft 14 from falling off. A spring receiving member 25 made of an insulating material that holds a pressing spring 18 that presses the measurement electrode 12 toward the fulcrum block 9 is provided at the top of the arm 7 above the measurement electrode 12.

The cross section of the spring receiving member 25 is shown in FIG. 1. Specifically, as can be seen from the right side view of the measuring electrode device 1 shown in FIG. It is formed in the shape of a letter, and is fixed to the tip 7a of the arm 7 by screws 10 integrally with the fulcrum block 9. A screw 26 is screwed into the upper part of the spring receiving member 25 to prevent the holding spring 18 from dropping off.
Are inserted into the holding spring 18 to prevent the holding spring 18 from falling off.

An electrode wire 27 connected to a measuring device (not shown) is screwed to the left end of the upper plane of the measuring electrode 12 with an electrode wire mounting screw 20 and applied to the electrolytic capacitor 2 from the measuring device (not shown). The DC voltage is transmitted to the measurement electrode 12 via the electrode wire 27, and further transmitted to the electrode contact 22 which is soldered to the lower end of the measurement electrode 12 with silver.

Next, the turning mechanism of the arm 7 will be described with reference to FIG. A cam follower 28 is provided on the rear surface of the left end of the arm 7. A predetermined gap is provided between the arm 7 and the frame 6, and a substantially disc-shaped cam plate 29 is provided in the gap, and the cam plate 29 is driven by the drive shaft 30. The cam plate 29 has a cam groove 31 formed therein. The cam groove 31 is a counterbore formed in a substantially elliptical shape and is formed on the surface of the cam plate 29, and the cam follower 28 is guided in the cam groove 31. Accordingly, depending on the rotation angle of the cam plate 29, the arm 7 can assume a state where the front end 7a is the most open as shown in FIG. 1 and a state where the front end 7a is the most closed as shown in FIG.

Here, the drive shaft 30 of the cam plate 29 is connected to a drive source (not shown), and is rotated by the control of the drive source by a control device (not shown).

In the above description, the mechanism around the arm 7, the fulcrum block 9 and the measuring electrode 12 has been described only on the upper side, but the lower arm 7, the fulcrum block 9 and the mechanism around the measuring electrode 12 are also arranged. Since there is no difference between the upper and lower parts only in the position and the shape of the upper and lower parts, description of the lower mechanisms is omitted.

Next, the operation of the measuring electrode device 1 of the present embodiment will be described. First, the measuring electrode device 1 is shown in FIG.
As shown in (1), the arm 7 is on standby with its tip 7a open. At this time, the cam follower 28 of the arm 7
Is guided by the cam groove 31 of the cam plate 29 so as to be closest to the drive shaft 30 (hereinafter, referred to as a “first state”).

At this time, while the electrolytic capacitor 2 is held by a known holder mechanism (not shown), as shown in FIG. 1, the anode lead wire 3 is leveled downward, and the cathode lead wire 4 is positioned upward. In the horizontal state, it is moved in the direction perpendicular to the plane of FIG. Next, as shown in FIG. 1, a separator plate 5 is provided between the anode lead 3 and the cathode lead 4.
Is sandwiched.

Thereafter, the drive source (not shown) is driven by the control of a control device (not shown), and the drive shaft 30 starts rotating. The direction of rotation of the drive shaft 30 may be either clockwise or counterclockwise. By the rotation of the drive shaft 30,
The cam plate 29 fixed to the drive shaft 30 also starts rotating in the same direction as the drive shaft 30. Therefore, the cam follower 28 is guided by the cam groove 31 to gradually drive the drive shaft 30.
The arm 7 rotates in the direction of arrow A shown in FIG. 1 around the support shaft 8 as the center of rotation. Then, when the cam plate 29 is rotated from the first state by a predetermined angle (a rotation angle smaller than 90 degrees), the distal end portion 7a of the arm 7 is in a state of a two-dot chain line shown in FIG.

At this time, the electrode contact 22 at the tip of the upper measuring electrode 12 is in contact with the cathode lead wire 4 of the electrolytic capacitor 2 mounted on the separator plate 5, and the tip of the lower measuring electrode 12 is Is in contact with the anode lead wire 3 of the electrolytic capacitor 2 placed on the separator plate 5. In this state, the pressing spring 18 that presses the measurement electrode 12 has not been compressed as compared with the first state (hereinafter, referred to as “second state”).

From the second state, the drive shaft 3
When 0 is rotated, as shown in FIG. 5, the cam plate 29 is rotated by 90 degrees from the first state. At this time,
The cam follower 28 is in a state most distant from the drive shaft 30, and the arm 7 is in a horizontal state as shown in FIG. 5 (hereinafter, referred to as a "third state").

In the second state, the electrode contact 22 at the tip of the measuring electrode 12 is already in contact with the anode lead 3 and the cathode lead 4 placed on the separator plate 5, When the tip 7a of the arm 7 approaches the separator plate 5, the measurement electrode 12 tries to rotate in the direction of arrow C in FIG. At this time, the counterbore 1 of the measurement electrode 12
Since the portion 9 is pressed by the pressing spring 18,
The electrode contact 22 at the tip of the measurement electrode 12 does not separate from the anode lead wire 3 and the cathode lead wire 4 of the electrolytic capacitor 2, and maintains the contact state after all, and moves on the anode lead wire 3 and the cathode lead wire 4. The lead wires 3 and 4 move in the root direction while being rubbed at a constant pressure. The sliding distance at this time is defined by the size of the arm 7 and the size of the measuring electrode 12, and the pressure is determined by the spring constant of the pressing spring 18. For example, the sliding distance on the lead wire is 2 mm. And a pressure of 200 g is sufficient.

By pressing the electrode contacts 22 against the anode lead wire 3 and the cathode lead wire 4, dirt and oxide film attached to the lead wires are removed by the electrode contacts 22.

In this third state, a DC voltage for measurement is supplied to the measurement electrode 12 via the electrode wire 27 from a power supply device (not shown). Here, the cathode lead wire 4 of the electrolytic capacitor 2 is placed above the separator plate 5, and the anode lead wire 3 of the electrolytic capacitor 2 is placed below the separator plate 5. Is connected to the negative side, and the lower measurement electrode 12 is connected to the positive side. Then, the characteristics and the like of the electrolytic capacitor 2 are measured.

Thereafter, the cam plate 29 is moved 90 degrees from the third state.
The arm 7 of the measuring electrode device 1
Is rotated about the support shaft 8 in the direction of arrow B shown in FIG. 1 and returns to the first state via the second state.

As described above, in the measuring electrode device 1 of the above embodiment, the lead wires 3 and 4 of the electrolytic capacitor 2 are used.
The electrode contact 22 at the tip of the measurement electrode 12 slides while pressing, so that dirt, oxide film and the like attached to the lead wire are removed and cleaned. Therefore, the contact resistance between the lead wire and the electrode contact 22 is reduced, and the accuracy of the test in the aging process of the electrolytic capacitor 2 is improved. In addition, since the surface of the electrode contact 22 is also rubbed by the lead wire, dirt and oxide film adhering to the surface of the electrode contact 22 are also removed, and the contact resistance is more reliably reduced.

Further, since the contact resistance of the electrode contact 22 can be reduced at any place on the lead wire, the position where the electrode contact 22 contacts the lead wire can be arbitrarily determined. The contact resistance between the electrode contact 22 and the lead wires 3 and 4 changes depending on the holding position, and the inspection result is not affected.

The measuring electrode device 1 is used not only for the aging process but also for measuring various electrical characteristics of the electrolytic capacitor by connecting probes of various measuring devices to the upper and lower measuring electrodes 12. can do.

In the above embodiment, the aging process for the electrolytic capacitor 2 has been described. However, the measuring electrode device 1 of the present embodiment is used for measuring the characteristics of various capacitors, inductors, and other electronic components. It goes without saying that you can do it.

In the above embodiment, the electrode support shaft 1 of the measuring electrode 12 is provided above the tip 7a of the upper arm 7.
4 is provided, the position of the electrode shaft support portion 14 does not necessarily have to be above the tip 7 a of the arm 7.
The arm 7 may be provided at a position protruding upward from the distal end portion 7a.

Further, in the above embodiment, the upper and lower arms 7 are provided symmetrically, but the upper and lower arms are not necessarily provided symmetrically, and a plurality of arms 7 may be used in parallel in the horizontal direction. Also, it is possible to provide the arm 7 in a straight line so as to face left and right in a horizontal plane, and to use the arm 7 for inspection of a linearly formed electronic element such as a resistor, a diode, or a capacitor having lead wires left and right. Needless to say.

Further, in the above embodiment, the cam plate 2
The cam follower 28 is guided by the 9 cam grooves 31 to open and close the arm 7. However, the opening and closing operation of the arm 7 does not necessarily depend on the cam mechanism, but uses a gear mechanism or another actuator mechanism. You may.

[0042]

As described above, in the measuring electrode device according to the first aspect of the present invention having the above structure, the electrode member held by the arm member by the electrode sliding means is connected to the lead wire. The contact slides on the lead wire placed on the placement portion. This contact sliding removes dirt, oxide film, and the like attached to the surface of the lead wire. Therefore, the contact resistance can be reduced, and the measurement accuracy is improved. Also, at any position where the electrode member contacts on the lead wire,
Since the contact resistance can be reduced, the contact position of the electrode member with respect to the lead wire can be arbitrarily determined.

Further, in the measuring electrode device according to the present invention, the lead wires of the electronic element are mounted on the front and back surfaces of the lead wire mounting portion made of an insulating plate material, respectively. Arm can sandwich the lead wire between the plate member and the electrode member provided at the tip of each arm, so that the lead wire of an electronic element such that two lead wires protrude in parallel like an electrolytic capacitor Can be reliably sandwiched, and dirt, oxide film, and the like attached to the surface of the lead wire can be reliably removed. Therefore, the contact resistance can be reduced, and the measurement accuracy is improved. Also, at any position where the electrode member contacts on the lead wire,
Since the contact resistance can be reduced, the contact position of the electrode member with respect to the lead wire can be arbitrarily determined.

Furthermore, in the measuring electrode device according to the third aspect of the present invention, in addition to the above-described effects, the cam followers provided at the bases of the pair of arms are guided by the rotation of the cam, so that the opening and closing of the arms can be performed. The operation can be reliably performed by a simple mechanism.

[Brief description of the drawings]

FIG. 1 is a front view of a measurement electrode device according to an embodiment of the present invention.

FIG. 2 is a right side view of the measurement electrode mechanism according to the embodiment of the present invention.

FIG. 3 is a perspective view of a fulcrum block used in the measurement electrode mechanism according to the embodiment of the present invention.

FIG. 4 is a perspective view of a measurement electrode used in the measurement electrode mechanism according to one embodiment of the present invention.

FIG. 5 is a front view showing an operation state of the measurement electrode device according to one embodiment of the present invention.

FIG. 6 is a front view of a conventional measuring electrode device.

[Explanation of symbols]

 Reference Signs List 5 separator plate 7 arm 8 support shaft 9 fulcrum block 12 measuring electrode 14 electrode support shaft 18 pressing spring 22 electrode contact 25 spring receiving member 28 cam follower 29 cam plate 31 cam groove

Claims (3)

[Claims] A lead wire mounting portion for mounting a lead wire of an electronic element; an arm member which moves so as to be separated from and close to the lead wire mounted on the lead wire mounting portion; An electrode for measurement, comprising: an electrode member held by an arm member; and electrode sliding means for bringing the electrode member into sliding contact with a lead wire mounted on the lead wire mounting portion. apparatus. 2. The lead wire mounting portion is made of an insulating plate material. The arm member is provided in a pair at symmetrical positions with the lead wire mounting portion interposed therebetween. The electrode device for measurement according to claim 1, wherein the electrode device is an electrode shaft support portion provided at a tip portion of the member to rotatably support the electrode member. 3. A cam follower is provided at a base of each of the pair of arm members, and each of the arm members is provided on a main body frame by an arm shaft supporting portion provided between the cam follower and the distal end portion. The cam follower is pivotally supported, and the cam follower is guided by a cam provided on a main body frame for opening and closing the distal end portion of the arm member with respect to the lead wire mounting portion. The electrode device for measurement according to 4.