JP2023086630A - Electric performance test machine - Google Patents

Abstract

To provide an electric performance testing machine which applies a measurement voltage by bringing an electrode in contact with a measurement part of a test piece, measures the electric performance of the test piece, and reduces the influence at the time of generation of a surge.SOLUTION: In a configuration having an application voltage control unit 120, a voltage application electrode 130, and a counter electrode 140, the voltage application electrode 130 includes: a terminal piece 131 to be probe for a measurement part of a test piece 200; a connection piece 132 for the terminal piece 131; a three-dimensional moving mechanism 150 for controlling a three-dimensional movement of the terminal piece 131 with respect to the measurement part of the test piece 200; and a mechanical switch mechanism 160 for switching a contact state in which the terminal piece 131 and the connection piece 132 are conductive with each other in the voltage application electrode 130 and a separation state in which the terminal piece 131 and the connection piece 132 are separated from each other. The mechanical switch mechanism 160 makes the on-state by dropping the connection piece 132 to the terminal piece 131 by its own weight and makes the off-state by separating the connection piece 132 from the terminal piece 131 by the pressure of air.SELECTED DRAWING: Figure 4

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical performance tester that measures the electrical properties of a test piece by applying a measurement voltage to a test piece with an electrode applied to the measurement location. Electrical properties include, for example, a dielectric breakdown voltage that measures the voltage at which insulation breaks down at a measurement point of a test piece.

Various product components may be required to be inspected for electrical properties. For example, regarding the insulation performance of members, a general withstand voltage characteristic test is defined in Japanese Industrial Standards (JISC2110:2016, etc.) and is widely used.
The Japanese Industrial Standards stipulate the test procedure of the withstand voltage characteristic test, and for example, the method of boosting the test voltage is also stipulated. Test voltage boosting methods include a short-time (rapid boosting) test, a 20-second stepped-up test, a slow stepped-up test, a 60-second stepped-up test, and an ultra-slow stepped-up test.
Here, the measurement point of the withstand voltage characteristic test of the member may be not only one place but also a plurality of adjacent places, and the performance is statistically evaluated using the results of measuring a plurality of members. It is possible.
In the measurement of the voltage resistance characteristic tester, it is preferable to reduce manual intervention and automate as much as possible.

As a conventional withstand voltage characteristic tester, the one disclosed in Patent Document 1 is known.
As shown in FIG. 5, Patent Document 1 has two electrodes that sandwich an insulating material and a spring that presses the electrodes, and a voltage is applied between the two electrodes to test the withstand voltage characteristics. A method and test apparatus for doing so are disclosed.

Moreover, the thing of patent document 2 is known as a conventional withstand voltage characteristic tester.
As shown in FIG. 6, in Patent Document 2, an insulating sheet W is sandwiched between a movable electrode 3 and a fixed electrode 4 and locally pressed, and a thin insulating sheet W is sandwiched between the movable electrode 3 and the fixed electrode 4. It is disclosed that a portion d is formed and a voltage is applied between the movable electrode 3 and the fixed electrode 4 to evaluate the withstand voltage characteristics of the insulating sheet W.

JP-A-2000-009789 JP 2021-032684 A JISC2110:2016

The withstand voltage characteristic tester of Patent Document 1 described above employs a method in which the insulating material is sandwiched and fixed by closing the gap between the two electrodes to which the test voltage is applied by the elastic force of a spring. Since the member to be tested is fixed to each electrode only by the force of the compression spring, manual replacement work is relatively easy.
However, the measurement point is limited to one point, and in order to measure another adjacent point, the point to be held manually must be changed. In other words, according to the technique of Patent Document 1, it is necessary to manually place both electrodes aiming at the measurement points and clamp the member by the elastic force of the spring. This work must be done manually and is not suitable for automation.
There is a big problem here. In the withstand voltage characteristics tester of Patent Document 1, the test piece must be removed manually, and ON/OFF switching of the application of the measurement voltage is electrically controlled. However, in the state of surge, the dielectric breakdown of the test piece conducts electricity and overloads the entire electric circuit of the withstand voltage characteristic tester. In other words, if a surge occurs due to dielectric breakdown of the test piece in a conventional withstand voltage characteristics tester, the effects of the overload surge will also occur in the electrical control circuit inside the tester, and it will be affected by the surge many times. There is a risk of failure or deterioration due to the influence of surge voltage.

Next, the withstand voltage characteristic tester of Patent Document 2 described above sandwiches the insulating sheet W between the movable electrode 3 and the fixed electrode 4 and locally presses the insulating sheet W between the movable electrode 3 and the fixed electrode 4. A thin portion d of W is formed, and a voltage is applied between the movable electrode 3 and the fixed electrode 4 to evaluate the withstand voltage characteristics of the insulating sheet W. FIG. A member to be tested is sandwiched between the movable electrode 3 and the fixed electrode 4 by the force of the spring of the lifting section 10 . The movable electrode 3 has a tip portion 32a, and the elevating portion 10 has a structure in which the elevating plate 5 can be raised and lowered with respect to the guide column 11. It is fixed by piercing the
However, in order to measure other adjacent points with a plurality of measurement points, the lifting unit 10 must move the lifting plate 5 up and down along the guide posts 11, and it takes time to change the measurement points. It is not suitable for measuring other adjacent points.
In other words, according to the technique disclosed in Patent Document 2, it is not easy to change the measurement point, and in the end, it has to be done manually, which is not suitable for automation. That is, the movement by the lifting unit 10 that moves the lifting plate 5 up and down along the guide column 11 is slow, and the movable electrode 3 is quickly separated from the member when dielectric breakdown occurs in the test piece and a surge occurs. I can't. This is a big problem. In the withstand voltage characteristic tester of Patent Document 2, the on/off switching of the application of the measurement voltage is also electrically controlled, and when a surge occurs, the dielectric breakdown of the test piece causes current to flow, which may cause an overload in the electric circuit of the withstand voltage characteristic tester. If a load is applied and it is repeatedly affected by surges, there is a possibility that it may break down or deteriorate due to the influence of the surge voltage.

The inventor Koji Furukawa, in view of such conventional problems, considered and invented a withstand voltage characteristic tester suitable for automating the measurement process. In particular, in order to reduce the influence of surge generation, mechanical switching control is used instead of electrical switching to gently approach and contact the measuring member when the electrode is brought into contact with the measuring member, and The inventors considered a method for quickly separating the electrodes when releasing the contact of the electrodes, and came to invent the withstand voltage characteristic tester according to the present invention.
In addition, the inventor Koji Furukawa found that the invented electrode can be widely used not only as a withstand voltage characteristic tester but also as an electrical performance tester using the electrode as a probe.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrical performance tester capable of measuring the electrical properties of a test piece by applying a measurement voltage by applying an electrode to the measurement location of the test piece and reducing the effects of surge generation. do.

In order to achieve the above object, the electrical performance tester of the present invention comprises an applied voltage control unit, a voltage applying electrode for applying a voltage, and a counter electrode for receiving the voltage from the voltage applying electrode, and tests the voltage applying electrode. An electrical performance tester for measuring the electrical properties of the test piece by applying a measurement voltage to the measurement location of the piece, wherein the voltage application electrode is a terminal piece that serves as a probe for the measurement location of the test piece. a three-dimensional movement mechanism for controlling three-dimensional movement of the terminal piece with respect to the measurement location of the test piece; and the terminal piece and the connection piece in the voltage applying electrode. An electrical performance tester for a test piece, characterized in that it has a mechanical switching mechanism for mechanically switching between a contact state in which the terminal piece and the connection piece are not energized and a separated state in which the terminal piece and the connection piece are not energized. is.

With the above configuration, the electrical properties of the test piece can be measured, the contact state and separation state are controlled by the mechanical switching mechanism, and the energization to the test piece via the contact piece and the terminal piece is ensured or interrupted. can be
The provision of the mechanical switching mechanism in the electrical performance tester of the present invention has a great advantage. In the prior art, on/off switching is performed by electrical switching, but in the state of surge, the dielectric breakdown of the test piece causes current to flow, and the entire electric circuit is overloaded. In other words, if a surge occurs due to dielectric breakdown of the test piece in a conventional electrical performance tester, the effect of the overload surge will also occur in the electrical control circuit inside the conventional electrical performance tester, and many times. When affected by a surge, the entire conventional electrical performance tester may also fail or deteriorate due to the surge voltage. On the other hand, in the electrical performance tester of the present invention, on/off switching is performed by mechanical switching. There is an advantage that the influence of overload due to is less likely to occur.

In the electrical performance tester of the present invention, the arrangement of the counter electrode includes an arrangement facing the voltage applying electrode across the test piece (electric property measurement mode in the vertical direction of the test piece), and If it is possible to switch either arrangement on the same surface as the voltage applying electrode on the creeping surface of the test piece (electric property measurement mode in the creeping direction of the test piece), in the electrical performance tester, the test piece This tester can be used for both electrical performance tests in the vertical direction (dielectric breakdown test, etc.) and dielectric breakdown tests in the creeping direction of the test piece (electrical performance test, etc.).

Next, in the electrical performance tester of the present invention having the above configuration, the mechanical switching mechanism is devised so that when the electrode is brought into contact with the measuring member, it is gently approached and brought into contact with the measuring member. It is possible to incorporate a structure capable of quickly separating the electrodes when releasing the contact of the electrodes from the contact.

First, as a device for the mechanical switching mechanism when the electrode is brought into contact with the measuring member, a gravity drop structure is provided so that the connection piece can move downward due to gravity. The transition may be such that the terminal piece and the connection piece come into contact with each other when the connection piece moves downward under its own weight and comes into contact with the terminal piece.
According to the above configuration, the electrode can be gently approached and brought into contact with the measuring member when the electrode is brought into contact with the measuring member.
In addition, the gravity applied to the connection piece in the gravity falling structure may be the weight of the connection piece itself.
Further, the gravity applied to the connection piece in the gravity falling structure may be the sum of the weight of the connection piece itself and the gravity of the replaceable weight body loaded on the connection piece.

Next, as a first contrivance of the mechanical switching mechanism for quickly separating the electrode from the measuring member, there is a structure provided with a pneumatic movement structure that enables the connection piece to be moved upward by air pressure.
The transition from the contact state to the separation state is achieved by the connection piece moving upward by air pressure by the pneumatic movement structure and being separated from the terminal piece, thereby interrupting the energization through the connection piece and separating the connection piece. state can be transitioned.
As a second contrivance of the mechanical switching mechanism for quickly separating the electrode from the measuring member, there is a structure having a pneumatic movement structure that enables the terminal piece and the connection piece to move upward by pneumatic pressure. .
The transition from the contact state to the separation state is performed by the terminal piece moving upward with air pressure by the pneumatic moving structure and separating from the test piece, thereby interrupting the energization through the connection piece and separating the terminal piece. state can be transitioned.

As described above, the mechanical switching mechanism is devised so that the electrode is brought into gentle contact with the measuring member when it is brought into contact with the measuring member, and the electrode is quickly released when the electrode is released from the measuring member. By incorporating structures that can be spaced apart from each other, the mechanical switching process can be quick and rapid. Whereas a conventional mechanism that raises and lowers the pillar via a gear or the like via a servo motor or the like cannot switch quickly, according to the above configuration, the transition from the contact state to the separated state and the separated state can be performed. The transition from the contact state to the contact state can be quickly and promptly performed, and the influence of surge generation can be reduced.

Here, when pneumatic pressure is used for the transition from the contact state to the separation state as a mechanical switching mechanism, consideration must be given to prevent the rapidly rising connecting piece from slipping out of the terminal piece. Therefore, the terminal strip is provided with a moving space for the connecting piece, a flange that closes the upper part of the moving space, and a hole through which the moving shaft of the connecting piece penetrates in the flange. and a moving shaft for moving the moving body. Preferably, the structure is restricted so that it cannot move upwards.
With the above structure, even if the connecting piece is rapidly moved upward by pneumatic pressure, it will not slip out of the terminal piece.

Here, it is preferable that the lower surface of the flange of the terminal piece is a horizontal surface, the hole portion is a vertical wall surface, the upper surface of the moving member of the connecting piece is a horizontal surface, and the wall surface of the moving shaft is a vertical wall surface. In this way, the contact surfaces between the two are all horizontal or vertical, and the relative movement between the two is restricted in the vertical direction, and there is no oblique movement. less likely to occur.
Here, the moving space of the connection piece in the terminal piece can be filled with a gaseous medium (for example, air), or can be filled with a liquid medium.
Although it is possible to measure the electrical properties of the test piece in air or liquid, it is also possible to operate in a state in which a gas or liquid suitable for the moving space of the connecting piece is introduced. Also, when filled with liquid, the liquid medium serves as a damper, and it is also possible to adjust the relative movement speed of the connecting piece with respect to the terminal piece.

As an application example of the electrical performance tester of the present invention, there is a dielectric breakdown measuring device that measures the voltage at which insulation breaks down (dielectric breakdown voltage) at a measurement point of a test piece.
In addition, for example, it can be widely applied as a measuring device using a probe, such as an electrical resistance measuring device for measuring electrical resistance at a measuring point of a test piece, and a tester device for determining an energized state at a measuring point on a test piece.

According to the electrical performance tester of the present invention, with a simple structure, a measurement voltage is applied to a measurement point of a test piece through an electrode having a connection piece and a terminal piece structure by a mechanical switching mechanism. , the electrical properties of the specimen can be measured. A mechanical switching mechanism quickly and quickly controls the contact state and separation state of the connection piece and the terminal piece, and the mechanical control of the electrode with the structure of the contact piece and the terminal piece ensures or cuts off the energization to the test piece. can be

1 is a configuration diagram simply showing the configuration of an electrical performance tester 100 according to a first embodiment; FIG. FIG. 2 is a diagram showing each part of a terminal piece 131 and a connection piece 132 in an enlarged manner; FIG. 4 is a diagram showing mechanical switching control of the terminal piece 131 and the connection piece 132 when measurement is performed in gas. FIG. 4 is a diagram showing mechanical switching control of the terminal piece 131 and the connection piece 132 when measurement is performed in liquid. FIG. 2 is a diagram showing a configuration example of an electrical performance tester disclosed in Japanese Unexamined Patent Application Publication No. 2000-009789 in the prior art; FIG. 2 is a diagram showing a configuration example of an electrical performance tester disclosed in Japanese Patent Application Laid-Open No. 2021-032684 in the prior art;

An embodiment of the electrical performance tester of the present invention will be described below.
However, the present invention is not limited to these examples. Needless to say, the scope of the present invention is not limited to specific applications, shapes, numbers, etc. shown in the following examples.
Hereinafter, when abbreviated as JIS, it means the current JIS2110:2016 or the succeeding standard when JIS2110 is revised in the future. Numerical values and conditions that are not described in the examples are the numerical values and conditions described in the current JIS2110:2016, or when JIS2110 is revised in the future.

The test piece 200 used by the electrical performance tester 100 shall meet the conditions and numerical values specified by JIS. Here, it is assumed to be rectangular with a specified size.
A configuration of the electrical performance tester 100 according to the first embodiment will be described.
FIG. 1 is a configuration diagram simply showing the configuration of an electrical performance tester 100 according to the first embodiment. FIG. 1(a) shows a vertical electrical property measurement mode. FIG. 1(b) shows the electrical property measurement mode in the surface direction.
The electrical performance tester 100 according to the first embodiment has a device configuration that can only measure electrical property measurement mode in the vertical direction, a device configuration that can only measure electrical property measurement mode in the creeping direction, and an electrical property measurement mode in the vertical direction. It is also possible to configure the device so that it can be switched between the electrical property measurement mode and the creepage direction electrical property measurement mode.

As shown in FIG. 1, the electrical performance tester 100 according to Example 1 includes a test piece table 110, an applied voltage control unit 120, a voltage applied electrode 130, a counter electrode 140, a three-dimensional movement mechanism 150, and a mechanical switching mechanism 160. It is configured with
Although illustration of other structures of the electrical performance testing machine 100 is omitted, it is assumed that the electrical performance testing machine has necessary components.

The test piece table 110 is a table on which one or more test pieces are placed side by side. Here, the measurement surfaces 210 of the test pieces 200 are placed side by side in a predetermined direction, for example, the vertical direction.
Incidentally, the test piece table 110 may be provided with a clamp device. A clamp device can be used to temporarily fix the test strip 200 placed on the test strip table 110 .

The applied voltage control section 120 supplies an applied voltage to the voltage applying electrode 130 . It is assumed that the applied voltage control section 120 can obtain a voltage from a commercial power supply, step up or step down the voltage, and convert it into a voltage necessary for various tests of electrical properties.
The applied voltage and the applied time (boosting method) controlled by the applied voltage control unit 120 conform to the JIS standard, and the voltage to be measured is supplied to the voltage applying electrode 130 by the boosting method according to the standard. and For example, as in the JIS standard, a prescribed applied voltage can be supplied.

The electrical performance tester 100 according to the first embodiment includes a voltage application electrode 130 and a counter electrode 140 as electrodes.
The voltage application electrode 130 is an electrode terminal to which the voltage from the applied voltage control section 120 is applied. A terminal piece 131 and a connection piece 132 for the terminal piece 131 are provided.
The terminal piece 131 and the connection piece 132 are mechanically movable relative to each other, and the energization of both can be switched on and off mechanically. That is, a mechanical switching mechanism 160 is provided for mechanically switching between a contact state in which the terminal piece 131 and the connecting piece 132 are in contact with each other and conducting current, and a separated state in which the terminal piece 131 and the connecting piece 132 are not conducting electricity. It's becoming

The mechanical switching mechanism of this voltage applying electrode 130 will be described in detail.
FIG. 2 is an enlarged view of each part of the terminal piece 131 and the connection piece 132. As shown in FIG.
FIG. 2( a ) is a pattern with a contact bottom surface 1315 .
FIG. 2(b) is a pattern with a bottom hole 1316 without a contact bottom surface 1315. FIG.

First, the pattern with contact bottom surface 1315 will be described.
As shown in FIG. 2A, the terminal piece 131 includes a moving space 1311 for the connecting piece, a flange 1312 closing the upper side of the moving space 1311, a hole 1313 through which the moving shaft of the connecting piece passes, and a wall surface 1314. and a contact bottom surface 1315 . The connecting piece 132 includes a moving body 1321 that moves within the moving space 1311 of the terminal piece 131 , a moving shaft 1322 and an electric wire 1323 .

The conductivity of the material of each portion of the terminal piece 131 and the connection piece 132 will be described.
As for the terminal piece 131, the flange 1312, the hole 1313, and the wall surface 1314 are preferably made of a non-conductive material having high insulation resistance, and the contact bottom surface 1315 is made entirely of a highly conductive metal material (e.g., copper). ) is preferred. As for the connection piece 132, both the moving body 1321 and the moving shaft 1322 are preferably made of a highly conductive metal material (for example, made of copper). It should be noted that the moving shaft 1322 may be entirely made of a conductive material, and if an electric line to be energized as an extension of the electric line 1323 passes through the interior to the moving body 1321, the shell material may be a non-conductive material. Also good.

The shape of the terminal piece 131 and the connection piece 132 is not limited, but for example, as shown in FIG. is preferred. Moreover, it is preferable that the upper surface of the moving body 1321 of the connecting piece 132 is a horizontal surface and the wall surface of the moving shaft 1322 is a vertical wall surface.
With such a shape, the connection piece 132 is guided to move in the vertical direction relative to the terminal piece 131, so that it is less likely that the connection piece 132 will come into contact with and get caught on a wall surface or the like due to oblique movement or the like. .

Next, a pattern with bottom hole 1316 without contact bottom 1315 will be described.
As shown in FIG. 2B, the terminal piece 131 has a moving space 1311, a flange 1312, a hole 1313, a wall surface 1314, and a bottom hole 1316. As shown in FIG. The connecting piece 132 includes a moving body 1321 that moves within the moving space 1311 of the terminal piece 131 , a moving shaft 1322 and an electric wire 1323 .
2(b), the terminal piece 131 placed at the measurement point of the test piece 200 has no bottom surface, and the moving body 1321 of the connection piece 132 directly contacts the measurement point of the test piece 200. As a result, the measurement voltage is applied to the measurement points of the test piece 200 via the conducting wire 1323 , the moving shaft 1322 and the moving body 1321 .

Next, the counter electrode 140 will be explained.
The counter electrode 140 is a terminal that receives voltage from the voltage application electrode 130 .
There are at least two patterns for the arrangement of this counter electrode 140 .
FIG. 1(a) shows a vertical electrical property measurement mode. The electrical property measurement mode in the vertical direction is a pattern in which the counter electrode 140 is arranged to face the voltage applying electrode 130 with the test piece 200 interposed therebetween.
In the vertical electrical property measurement mode, the voltage-applying electrode 130 and the counter electrode 140 are arranged vertically with the test piece 200 interposed therebetween. The electrical properties of the test piece 200 in the vertical direction can be measured. For example, the dielectric strength of the insulating layer can be tested by measuring the vertical dielectric breakdown voltage of the test piece 200 .

FIG. 1(b) shows the electrical property measurement mode in the surface direction. The electrical property measurement mode in the creeping direction is a pattern in which the counter electrode 140 is arranged on the same surface as the voltage applying electrode 130 along the surface of the test piece 200 .
In the electrical property measurement mode in the creeping direction, the voltage-applying electrode 130 and the counter electrode 140 are arranged in parallel on the same surface of the test piece 200, and the voltage from the voltage-applying electrode 130 is applied in the surface direction (creeping direction) of the test piece 200. ) and received by the counter electrode 140, the electrical properties of the surface (creeping direction) of the test piece 200 can be measured. For example, the dielectric strength in the surface direction can be tested by measuring the dielectric breakdown voltage in the creeping direction of the test piece 200 .

Next, a mechanical movement structure 150 and a mechanical switching mechanism 160 will be described as a configuration for performing mechanical switching control of movement to a measurement point and on/off of the voltage applying electrode 130 shown in FIG.

The mechanical movement structure 150 is a mechanism for controlling the three-dimensional movement of the terminal piece 131 of the voltage applying electrode 130 with respect to the measurement location of the test strip 200 . That is, the terminal piece 131 of the voltage applying electrode 130 can be vertically moved as a probe to bring the terminal piece 131 into contact with the test piece 200 or to separate the terminal piece 131 from the test piece 200 . Further, the terminal piece 131 of the voltage applying electrode 130 can be horizontally moved as a probe, and the terminal piece 131 can be moved to the test piece 200 at a predetermined pitch. Of course, it is preferable that the vertical movement and horizontal movement of the terminal piece 131 of the voltage applying electrode 130 can be combined to control the movement three-dimensionally.

Next, the mechanical switching mechanism 160 has a contact state (ON state) in which the terminal piece 131 and the connection piece 132 are energized in the voltage applying electrode 130, and a separated state (OFF state) in which the terminal piece 131 and the connection piece 132 are not energized. ) mechanically (mechanical switching control mechanism).
Either or both of the terminal strip 131 and the connecting strip 132 of the voltage applying electrode 130 are relatively movable under the control of the mechanical switching mechanism 160 . The state in which the terminal piece 131 and the connection piece 132 are in contact (contact state) and the state in which the terminal piece 131 and the connection piece 132 are separated (separated state) can be switched mechanically. Here, the mechanical switching control between the contact state and the separated state of the terminal piece 131 and the connection piece 132 is called mechanical switching control.

Providing the mechanical switching mechanism 160 in the electrical performance tester 100 of the present invention has a great advantage. Many of the conventional electrical performance testers perform on/off switching by electrical switching, but in the state of surge, the dielectric breakdown of the test piece 200 causes current to flow, and all electrical circuits are overloaded. In other words, if a surge occurs due to dielectric breakdown of the test piece 200 in the conventional electrical performance tester, the influence of the overload surge will also occur in the electric control circuit inside the conventional electrical performance tester, and many times. In the case of a conventional electrical performance tester, if the device is also affected by a surge, there is a possibility that the entire device may fail or deteriorate due to the surge voltage. On the other hand, in the electrical performance tester 100 of the present invention, on-off switching is performed by mechanical switching by the mechanical switching mechanism 160, and quick mechanical on-off switching can be performed even when a surge occurs. The main body of the performance tester has the advantage that it is less likely to be affected by overload due to surges.

3 and 4 are cross-sectional views showing the mechanical switching mechanism of the voltage applying electrode 130. FIG.
FIG. 3 is a diagram showing mechanical switching control of the terminal piece 131 and the connection piece 132 when measurement is performed in gas. The terminal piece 131 is filled with a gaseous medium.
FIG. 4 is a diagram showing mechanical switching control of the terminal piece 131 and the connection piece 132 when measurement is performed in liquid. The terminal piece 131 is filled with a liquid medium.
In addition to the pattern with the contact bottom surface 1315 shown in FIG. 2(a), the voltage application electrode 130 also has a pattern without the contact bottom surface 1315 and with a bottom hole 1316 as shown in FIG. 2(b). However, FIGS. 3 and 4 typically show the pattern of FIG. 2(a) as an example. The pattern shown in FIG. 2(b) can be considered in the same way.

First, the ON operation by the mechanical switching mechanism 160 will be described.
The ON operation by the mechanical switching mechanism 160 changes from the separated state (blocked state) in which the terminal piece 131 and the connecting piece 132 of the voltage applying electrode 130 are separated to the contact state (energized state) in which the terminal piece 131 and the connecting piece 132 are in contact. This is a physical switching operation.
3(a) and 4(a) show the ON operation by the mechanical switching mechanism 160. FIG. When the connection piece 132 that has been held upward reaches the bottom surface of the terminal piece 131, the connection piece 132 is energized.
Here, the drive method for the ON operation by the mechanical switching mechanism 160 is the falling movement using the weight of the connecting piece 132 .
3(a) and 4(a), it is assumed that the terminal piece 131 is in contact with the measurement point of the test piece 200 by the mechanical movement structure 150 in advance.
As seen in the figure on the left side, the moving body 1321 of the connecting piece 132 is positioned above in the moving space 1311 of the terminal piece 131 in contact with the measurement point of the test piece 200, and the contact bottom surface 1315 of the conductive material are separated and electrically disconnected.
If the connection piece 132 is put in a free motion state from this state, the connection piece 132 moves downward due to its own weight, and the connection piece 132 freely falls. As a result, in FIG. 3(a), moving body 1321 falls to a position where it contacts contact bottom surface 1315 of the conductive material, as seen from the left drawing through the middle drawing to the right drawing.

FIG. 3( a ) shows free fall in gas and moves relatively quickly.
FIG. 4A shows free fall in liquid, and the liquid in the moving space 1311 acts as a kind of damper and moves relatively gently. Since the connection piece 132 is not heavy, the moving body 1321 is slowly seated on the contact bottom surface 1315 . In order to control the speed of movement against the stress of this damper, it is possible to attach a replaceable weight (not shown). By applying a weight (not shown) to the connecting piece 132, the falling speed of the connecting piece 132 can be adjusted.

When the moving body 1321 contacts the contact bottom surface 1315 of the conductive material, the measurement voltage applied from the applied voltage control section 120 is applied to the moving body 1321 through the conducting wire 1323 and the moving shaft 1322. is applied to the measurement point of the test piece 200 via the contact bottom surface 1315 of the test piece 200 .

Next, the off operation by mechanical switching mechanism 160 will be described.
The ON operation by the mechanical switching mechanism 160 changes from the separated state (blocked state) in which the terminal piece 131 and the connecting piece 132 of the voltage applying electrode 130 are separated to the contact state (energized state) in which the terminal piece 131 and the connecting piece 132 are in contact. This is a physical switching operation.
3(b) and 4(b) show the OFF operation by the mechanical switching mechanism 160. FIG. When the movable body 1321 of the connecting piece 132 that is in contact with the lower part is separated upward from the contact bottom surface 1315 of the conductive material, the electricity is cut off.

Here, the method of driving the mechanical switching mechanism 160 during the OFF operation is a method of applying air pressure as a negative pressure to the connection piece 132 to perform suction movement.
As seen in the left figure, the moving body 1321 of the connecting piece 132 is in contact with the contact bottom surface 1315 of the conductive material of the terminal piece 131, and is electrically conducting.
When a negative air pressure is applied from above to the connection piece 132 in this state, the connection piece 132 is quickly moved upward due to the negative pressure, and the connection piece 132 is sucked upward. As a result, in FIG. 3(b), moving body 1321 is abruptly attracted to the inner surface of flange 1312 and moves, as seen from the left drawing to the right drawing through the middle drawing. Note that the outer diameter of the moving body 1321 is larger than the inner diameter of the hole 1313 formed in the flange 1312 so that it cannot be pulled out. In other words, even if the moving body 1321 abruptly moves upward due to the negative air pressure, the movement of the moving body 1321 is limited by contact with the inner surface of the flange 1312, and the voltage applying electrode 130 is not separated.
FIG. 3(b) shows movement in gas, and moves rapidly.
FIG. 4(a) shows movement in a liquid, and although the liquid in the movement space 1311 acts as a kind of damper, the movement is relatively rapid.

Since the moving body 1321 is separated from the contact bottom surface 1315, the measurement voltage applied from the applied voltage control unit 120 is energized from the conducting wire 1323 and the moving shaft 1322 to the moving body 1321. Since it is separated from 1315, the energization to the measurement point of the test piece 200 is interrupted at high speed.
In this manner, the voltage application electrode 130 is physically switched between ON and OFF operations by the mechanical switching mechanism 160 .

Here, assuming that the upper surface of the moving body 1321 of the connecting piece 132 is a horizontal surface, the lower surface of the moving body 1321 is also a horizontal surface, and the lower surface of the flange 1312 of the terminal piece 131 is also a horizontal surface, as a shape feature, FIG. 4B, the connecting piece 132 suddenly rises due to air pressure, and the upper surface of the moving body 1321 of the connecting piece 132 collides with the lower surface of the flange 1312 of the terminal piece 131. Also, since contact between the upper surface of moving body 1321 and the lower surface of flange 1312 of terminal piece 131 occurs evenly around hole 1313 of terminal piece 131, as a result of the off operation by mechanical switching mechanism 160 , the connection piece 132 is forced to return to the default state in which the horizontal state of the moving body 1321 and the vertical state of the moving shaft 1322 are maintained. , the connection piece 132 falls in a vertical state when it falls by its own weight.

Although the preferred embodiment of the configuration example of the electrical performance tester of the present invention has been illustrated and described above, it should be understood that various modifications can be made without departing from the technical scope of the present invention. be.

The electrical performance tester of the apparatus of the present invention can be widely applied as an electrical performance tester capable of processing strip-shaped test pieces from dumbbell-shaped tests specified by JIS and ISO.

REFERENCE SIGNS LIST 100 Electrical Performance Tester 110 Test Piece Base 120 Applied Voltage Control Unit 130 Voltage Applied Electrode 131 Terminal Piece 1311 Moving Space 1312 Flange 1313 Hole 1314 Wall 1315 Contact Bottom 1316 Bottom Hole 132 Connecting Piece 1321 Moving Body 1322 Moving Axis 1323 Electric Wire 140 counter electrode 150 three-dimensional movement mechanism 160 mechanical switching mechanism

Claims (12)

Equipped with an applied voltage control unit, a voltage applying electrode for applying a voltage, and a counter electrode for receiving the voltage from the voltage applying electrode, the voltage applying electrode is applied to a measurement location of the test piece to apply a measurement voltage, and the test piece is measured. An electrical performance tester for measuring electrical properties,
The voltage-applying electrode comprises a terminal piece serving as a probe for the measurement location of the test piece, and a connection piece for the terminal piece,
a three-dimensional movement mechanism for controlling three-dimensional movement of the terminal piece with respect to the measurement location of the test piece;
A mechanical switching mechanism is provided for mechanically switching between a contact state in which the terminal piece and the connection piece are energized in the voltage applying electrode and a separated state in which the terminal piece and the connection piece are not energized. A specimen electrical performance tester characterized by: The arrangement of the counter electrode can be switched between an arrangement facing the voltage-applying electrode with the test piece interposed therebetween and an arrangement on the same surface as the voltage-applying electrode along the surface of the test piece. The test piece electrical performance tester according to claim 1. The mechanical switching mechanism includes a gravity drop structure that allows the connection piece to move downward due to gravity,
The transition from the separated state to the contact state is characterized in that the terminal piece and the connection piece are brought into the contact state when the connection piece moves downward under its own weight and comes into contact with the terminal piece. The electrical performance tester for the test piece according to claim 1 or 2. 4. The test piece electrical performance tester according to claim 3, wherein the gravity applied to the connection piece in the gravity drop structure is the weight of the connection piece itself. 4. The gravity drop structure according to claim 3, wherein the gravity applied to the connection piece in the gravity drop structure is the sum of the weight of the connection piece itself and the gravity of the replaceable weight body loaded on the connection piece. Electrical performance tester for specimens. The mechanical switching mechanism includes a pneumatic movement structure that enables the connection piece to move upward by pneumatic pressure,
The transition from the contact state to the separation state is achieved by the connection piece moving upward by air pressure by the pneumatic movement structure and being separated from the terminal piece, thereby interrupting the energization through the connection piece and separating the connection piece. 6. The test piece electrical performance tester according to any one of claims 1 to 5, wherein the test piece transitions between states. The mechanical switching mechanism includes a pneumatic movement structure that allows the terminal piece and the connection piece to move upward by pneumatic pressure,
The transition from the contact state to the separation state is performed by the terminal piece moving upward with air pressure by the pneumatic moving structure and separating from the test piece, thereby interrupting the energization through the connection piece and separating the terminal piece. 6. The test piece electrical performance tester according to any one of claims 1 to 5, wherein the test piece transitions between states. the terminal piece includes a movement space for the connection piece, a flange that closes an upper portion of the movement space, and a hole in the flange that allows the movement shaft of the connection piece to pass through,
wherein the connecting piece comprises a movable body that moves within a moving space of the terminal piece, and the moving shaft that moves the movable body,
2. The structure is such that, when said connecting piece is separated from said terminal piece, said moving body abuts against said flange and is restricted so as not to move upward any further. An electrical performance tester for the test piece according to 6 or 7. the lower surface of the flange of the terminal piece is a horizontal surface, the hole is a vertical wall surface,
9. The test piece electrical performance tester according to claim 8, wherein the upper surface of the moving body of the connecting piece is a horizontal surface, and the wall surface of the moving shaft is a vertical wall surface. 10. The test strip electrical performance tester according to any one of claims 1 to 9, wherein the moving space in the terminal strip is filled with an air medium. 10. The test strip electrical performance tester according to any one of claims 1 to 9, wherein the moving space in the terminal strip is filled with a liquid medium. 12. Any one of claims 1 to 11, wherein the measured electrical property of the test piece is a dielectric breakdown voltage that measures a voltage at which insulation breaks down at the measurement point of the test piece. Electrical Performance Tester for Specimens as Described.

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