JPH06186287A - Method and apparatus for measuring electronic component - Google Patents

Abstract

PURPOSE:To realize a method and an apparatus for measuring an electronic component with high reliability without trouble in which an acceleration of a processing speed is facilitated. CONSTITUTION:An entire measuring terminals of a measuring probe 70 having measuring terminals of the more number than that of a plurality of electrodes are brought into contact with an outer periphery of a ring varistor 1 having the plurality of electrodes on the outer periphery to be temporarily measured. The terminals in contact with the electrodes are electrically selected according to a result of the temporary measurement, and characteristics between the electrodes and special electrodes are measured. In this case, a plurality of the probe 70 are mounted on intermittent rotors 50, and characteristics of the varistor 1 are measured while moving the varistor 1 by the intermittent rotation of the rotor 60, thereby accelerating a processing speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring method and apparatus for measuring the electrical characteristics of an electronic component such as a ring varistor having a plurality of electrodes on its outer peripheral surface.

[0002]

2. Description of the Related Art Conventionally, as a measuring device for an electronic component such as a ring varistor having a plurality of electrodes on its outer peripheral surface, FIG.
There was a configuration shown in. As shown in this figure, the conventional measuring device has two measuring lines A and B, and each measuring line A and B supplies a ring varistor 1 having an annular shape and three side surface electrodes on its circumferential surface. The parts feeder 2 and the ring varistor 1 supplied from the linear feeder 2A of the parts feeder 2 via the vacuum pad handling 3
It is provided with a character-shaped carrier rail 4 and a transfer 6 having a large number of feed claws 5 and feeding the ring varistor 1 on the rail 4 at a constant pitch.

As shown by the arrow in the figure, the vacuum pad handling 3 attracts the ring varistor 1 and ascends it, moves it forward at a constant pitch and lowers it to release the ring varistor 1, and then lifts it up, moves it back at a constant pitch and lowers it. Is repeated. By the operation of the vacuum pad handling 3, the ring varistor 1 is transferred from the linear supply path 2A of the parts feeder 2 to the L-shaped transfer rail 4 and further sent to the long side portion of the L-shaped transfer rail 4.

As shown by the arrows in the figure, the feed claws 5 of the transfer 6 project perpendicularly to the longitudinal direction of the L-shaped transport rail 4 and advance a fixed distance in the longitudinal direction to advance the ring varistor 1 at a constant pitch. Then, the operation of retreating slightly, separating from the ring varistor 1, retracting vertically in the rail longitudinal direction, and further retracting in the longitudinal direction is repeated.

A centering portion 7 is provided at an intermediate position of the L-shaped transport rail 4, and as shown in FIGS. 19 to 21, the centering portion 7 is rotationally driven by a DC motor 8 having a high stopping accuracy. In addition to having the centering table 9, the photoelectric sensor 10 is provided so as to face the outer peripheral surface of the ring varistor 1 mounted on the centering table 9. Centering table 9
Has a function of vacuum-sucking and fixing the ring varistor 1. 20 and 21, the center of rotation of the centering table 9 is indicated by the symbol C.

A measuring section 11 is provided at the end of the L-shaped transfer rail 4 that has passed through the centering section 7.
An insulating table 29 is arranged on the rail 4 portion of the measuring unit 11 as shown in FIG. The insulating table 29 has a function of fixing the ring varistor 1 by vacuum suction.
A measuring probe 20 shown in FIGS. 22 and 23 is provided on the measuring unit 11 so as to be vertically movable and openable and closable. The measuring probe 20 has a metal body 21 and a link pin 22.
A plurality of metal opening / closing arms 23 pivotally attached to each other, an insulating plate 24 and a plastic screw 25 for the opening / closing arms 23.
It has a measuring terminal 26 fixed in an insulated state, a taper cam 27 that opens and closes each open / close arm 23, and a coil spring 28 that constantly biases each open / close arm 23 in a closing direction.

The ring varistor 1 to be measured here has three side surface electrodes 31 on the outer peripheral surface (circumferential surface) of an annular ceramic body 30 having a constant thickness as shown in FIG.
A, 31B, 31C are formed, and there is an inter-electrode gap 32 in which the ceramic base is exposed between the side surface electrodes. Therefore, three measuring terminals 26 of the measuring probe 20 are provided so that they can simultaneously contact the three side electrodes on the ring varistor 1 side.

Incidentally, FIG. 22 shows a state where the taper cam 27 of the measuring probe 20 is in the raised position and the measurement terminals 26 are closed, and FIG. 23 shows a state in which the taper cam 27 is in the lowered position and the measurement terminals 26 are open. Each measurement terminal 26 can be opened and closed in the radial direction of the ring varistor 1.

The measuring section 11 of the L-shaped carrier rail 4
The portion that has passed through is a sorting section 35, and a sorting box 36 is arranged below the rail 4 of the sorting section 35. The sorting unit 35 also includes a slide holder 39 to which a plurality of sorting air cylinders 38 corresponding to the respective stop positions of the ring varistor 1 are attached. The slide holder 39 repeats the reciprocating motion in a direction orthogonal to the longitudinal direction of the L-shaped transport rail 4, and the rod of the selected sorting air cylinder 38 extends to form the center hole of the corresponding ring varistor 1. When fitted, the ring varistor 1 moves along with the movement of the slide holder 39 so that the sorting box 3
It moves in 6 directions and falls.

In the above conventional apparatus, the ring varistor 1 sent to the end of the linear feeder 2A of the parts feeder 2 is adsorbed by the vacuum pad handling 3 and transferred to the L-shaped transfer rail 4, and further vacuum pad handling. It is sent to the longitudinal part of the L-shaped carrier rail 4 by 3.
The ring varistor 1 that has arrived at the longitudinal portion of the L-shaped transport rail 4 slides forward on the rail 4 at constant pitches by the transfer 6 having a large number of feed claws 5.

The side electrodes 31A, 31B and 31C are aligned with the ring varistor 1 attached to the centering portion 7. That is, the centering table 9 is rotated in a fixed direction by the DC motor 8 of FIG.
When the interelectrode gap 32 is detected at 0, the DC motor 8 is immediately stopped. After that, the ring varistor 1 is the side electrode 3
In a state in which the arrangements of 1A, 31B and 31C are uniform, the transfer 6 sends them by a constant pitch. Then, as shown in FIG. 23, when the ring varistor 1 arrives on the insulating table 29 of the measurement unit 11, the measurement probe 20 that has been waiting by opening each measurement terminal 26 at the elevated position descends and moves to the ring varistor 1's position. The outer peripheral surface is clamped by the measuring terminal 26. At this time, the centering table 9 is used to attach the side electrodes 31A, 31
Since the positions of B and 31C are uniformly arranged, the three measurement terminals 26 are provided with the three side surface electrodes 31A, 31B and 31C.
And the electrical resistance between the side electrodes is measured with a measuring instrument connected to the three measuring terminals 26 during this contact time.

The measurement of the electric resistance by the measuring device of the ring varistor 1 is carried out alternately on the two measuring lines A and B.

After the measurement, the ring varistor 1 reaches the sorting section 35 by the constant pitch feed of the transfer 6, and is sorted into a particular sorting box 36 according to the measurement result.

[0014]

By the way, the above-mentioned conventional device has the following problems. (1) Parts feeder 2 that supplies the ring varistor 1
Although not shown, the end of the linear supply path 2A was covered with a lid for preventing the ring varistor 1 from overlapping, which was a cause of clogging (note that without the lid, 100% overlapped and clogged). . (2) Vacuum pad handling 3, centering part 7
Also, the measuring unit 11 adopts a method of fixing the ring varistor 1 by suction, and fragments and dust of the ring varistor 1 are clogged in the suction portion, which causes a failure. (3) In the centering portion 7, the centers of the ring varistor 1 and the centering table 9 are not aligned, the distance between the ring varistor 1 and the photoelectric sensor 10 changes during rotation, and it becomes difficult to detect the inter-electrode gap 32, resulting in malfunction. There was a case to do. The reason why the center of the ring varistor 1 and the centering table 9 are not aligned is that the outer diameter of the ring varistor 1 varies as shown by the phantom lines 1A and 1B in FIG. 20 and the transfer 6 of the transfer 6 as shown in FIG. The burrs 37 of the side surface electrodes 31A, 31B, 31C of the ring varistor 1 fed while sliding on the L-shaped carrier rail 4 by the claws 5 are caught in the gap G between the carrier rail 4 and the centering table 9, and then in the feeding direction. It may be skipped. (4) Side electrodes 31A, 31B of the ring varistor 1,
Due to the color variation of 31C, it may be difficult for the photoelectric sensor 10 to detect the inter-electrode gap 32, and malfunction may occur. The reason is that when the ring varistor 1 remains in the parts feeder 2 for a long time, the ring varistor 1 rubs against each other due to vibration and the side electrodes are discolored. (5) The measurement terminal 26 of the measurement probe 20 is a spring plate material plated with silver, but if the silver plating is worn away, the contact resistance becomes high and the measured value becomes erratic. (6) The operation of the measuring unit 11 is, for example, 0.2 seconds for transporting the ring varistor 1, 0.1 seconds for lowering the measurement probe 20, 0.1 seconds for closing the measurement probe, and 0 for characteristic measurement by the measuring instrument. It takes 0.24 seconds, 0.1 seconds to open the measurement probe, and 0.1 seconds to move up the measurement probe, and the ratio of the time required for the operation of peripheral related parts is larger than the time required for the actual characteristic measurement of the ring varistor 1. ing. Therefore, in order to increase the processing tact, the structure has two mechanisms, that is, the measurement line A and the measurement line B. However, by having the two mechanisms, the device size becomes large, and the factor of failure occurrence is doubled. Therefore, maintenance becomes troublesome.

In view of the above points, an object of the present invention is to provide a method and apparatus for measuring an electronic component, which makes it easy to increase the processing speed, has few failures, and has high reliability.

[0016]

In order to achieve the above object, an electronic component measuring method according to the present invention comprises an electronic component having a plurality of electrodes on an outer peripheral surface thereof, the plurality of electrodes being provided on the outer peripheral surface. All the measurement terminals of the measurement probe having more than the number of measurement terminals are contacted for temporary measurement, and the measurement terminals in contact with the respective electrodes are electrically selected according to the result of the temporary measurement. The characteristics between each other or between specific electrodes are measured.

Further, the measuring device for electronic parts of the present invention comprises a parts feeder for successively sending out electronic parts having a plurality of electrodes on the outer peripheral surface, a rotary table for receiving the electronic parts sent out from the parts feeder, and the rotary. It has a guide member that guides the electronic parts transferred from the table to the transfer position, a push-up member on which the electronic parts that arrive at the transfer position are placed, and a number of measurement terminals that is larger than the number of the plurality of electrodes. The measurement probe holds the electronic component in the raised position by the push-up member, and the selection switching means for selectively connecting each measurement terminal to the measuring instrument.

[0018]

In the present invention, the electronic parts are not centered and the electrode positions on the outer peripheral surface thereof are not uniformly aligned.
The electrode position on the outer peripheral surface is arbitrary. Therefore, all of the measurement terminals, which are larger in number than the number of electrodes on the outer peripheral surface, are contacted with the outer peripheral surface of the electronic component to make a tentative measurement, and the electrode position on the outer peripheral surface is recognized by the tentative measurement. It is possible to select the contacting measuring terminal and connect it to the measuring instrument to measure the characteristics of the electronic component.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a method and apparatus for measuring an electronic component according to the present invention will be described below with reference to the drawings.

1 and 2 show the overall construction of the embodiment. In these figures, on a base 110, a parts feeder 40 for supplying a ring varistor 1 as an electronic component to be measured, and a linear supply path 40A for the parts feeder 40.
From the rotary table 50 which receives the supply of the ring varistor 1 from the above, the intermittent rotating body 60 having the measurement probe attachment arms 61 at 90 degree intervals, the measurement probe 70 attached to the tip of each arm 61, and the selection table 80. Is equipped with.

A hopper 41 which accommodates a large number of ring varistor 1 is arranged above the parts feeder 40, and is used for supplementing the ring varistor 1 in the parts feeder 40 when it runs out. The parts feeder 40 has a function of arranging the ring varistor 1 into one row and sending it to the linear supply path 40A by vibration.

As shown in FIGS. 2 to 3, the rotary table 50 includes a central shaft 5 which is vertically fixed on a base 110.
1 is rotatable about a rotation fulcrum, and a belt wheel 52 is fixed and integrated with the rotary table 50. A rotary table driving motor 53 is fixed to the central shaft 51, and a belt 55 is provided between a belt wheel 54 fixed to the rotary shaft of the motor 53 and a belt wheel 52 integrated with the rotary table 50. It is wrapped around. Therefore, the rotary table 50 has a motor 53.
1 and FIG. 3, it continuously rotates counterclockwise in the counterclockwise direction.

An inner guide disk 56 is provided on the central shaft 51.
Is fixed, and the connecting fixture 5 is connected to the inner guide disk 56.
The outer guide plate 58 is fixed via the guide plate 7. The inner guide disk 56 and the outer guide plate 58 are arranged to guide the ring varistor 1 on the rotary table 50 so that the ring varistor 1 is placed on the peripheral portion of the rotary table 50 and moves in an arc shape. Also, the inner guide disk 5
Optical sensors S1 and S2 are attached to 6 at two locations with attachments 59. These optical sensors S1 and S2 are for detecting that the ring varistor 1 on the rotary table 50 is gone. When the optical sensor S1 detects that the ring varistor 1 is not present, the parts feeder 40 and its linear supply path 40A are driven.
When 2 detects the absence of the ring varistor 1, the device is stopped as an abnormality.

A guide member 91 having a guide path 90 for guiding the ring varistor 1 to a transfer position P which is separated from the rotary table 50 is fixed to the right end of the outer guide plate 58. The guide member 91 is the rotary table 5
It is provided with an extension portion 91A that extends obliquely on the peripheral edge portion of 0 and a stopper portion 91B that positions and stops the ring varistor 1 that is moved to the position P by the extension portion 91A. Further, a cutout 92 is provided at the transfer position P of the guideway 90.
A push-up rod 100 as a push-up member is supported in the notch 92 by a support cylinder 101 fixed to the base 110 side so as to be able to move up and down. The push-up rod 100 is normally waiting for the arrival of the ring varistor 1 at the same height as the guide path 90.

As shown in FIG. 2, the intermittent rotating body 60 is fixed to an upper end portion of an intermittent rotating shaft 62 rotatably supported by a bearing 61 with respect to a base 110, and the four intermittent rotating bodies 60 are fixed. Arm 61 for mounting the measurement probe (at intervals of 90 degrees)
A measurement probe 70 is attached to each.

As shown in FIGS. 4 to 8, each measuring probe 70 has five measuring terminals 71, and each measuring terminal 7
1 is fixed to the lower end portions of two glass flexible epoxy laminated plates 72A and 72B serving as parallel flexible plate members, and the upper end portions of the glass epoxy laminated plates 72A and 72B are screwed to the main body portion 74 via a fixture 73. It is fixed. Movable pieces 75 are fixed to intermediate positions of the inner glass epoxy laminated plate 72A. A taper cam 77 is integrally provided at a lower portion of a shaft body 76 that penetrates the main body portion 74 slidably in the vertical direction, and the taper cam 77 can abut each movable piece 75 to widen the interval between them. It is like this. A head 78 of the shaft 76 has a disk shape, and a compression spring 79 for urging the taper cam 77 upward is disposed between the lower surface of the head 78 and the body 74. The small diameter portion 74A of the main body portion 74 is fixed to the measurement probe mounting arm 61. The tips of the five measuring terminals 71 are located at the vertices of a regular pentagon (divided by 72 degrees), and these measuring terminals 71 avoid contact resistance change due to wear.
Hardened steel without surface treatment.

The opening operation of each measuring probe 70 is performed by an external force (pushing down the taper cam 77), and the closing operation is performed by the self-recovery (elasticity) of the glass epoxy laminated plates 72A and 72B.

As shown in FIGS. 1 and 2, the measuring probe 70 attached to the intermittent rotating body 60 has a stop position Q1 immediately above the transfer position P, and a stop rotated 90 degrees from the stop position Q1. Position Q2, stop position Q3 rotated 90 degrees from this stop position Q2, and this stop position Q3 to 9
It has four stop positions, a stop position Q4 rotated by 0 degrees.
The stop position Q1 is a position at which the measurement probe 70 clamps the ring varistor 1 on the transfer position P when the push-up operation of the push-up rod 100 raises the ring varistor 1, and the stop position Q3 is the ring where the electrical resistance measurement is completed. It is a position where the varistor 1 is released from the measurement probe 70 and dropped on the selection table 80.

In order to open and close the measuring probe 70 at the stop positions Q1 and Q3, a swing lever 64 is pivotally supported by a support column 63 which is vertically erected on the base 110, and the swing lever 64 has two positions. A roller 65 is pivotally attached to the tip end portion branched to the crotch. The roller 65 opens and closes the measuring probe 70 by abutting against the head 78 for driving the taper cam shown in FIGS. 5 and 7 of the measuring probe 70 which is stopped at the stop positions Q1 and Q3 and pushing it down. That is, when the roller 65 is in the raised position, as shown in FIG.
Is the raised position, and the glass epoxy laminated plates 72A, 72
B is straight, and the distance between the tips of the respective measurement terminals 71 is the smallest, and the measurement terminals 71 are in a closed state. On the other hand, when the roller 65 moves to the lowered position as the swing lever 64 swings, the taper cam 77 is lowered to the lowered position via the head 78, and the taper cam 77 abuts the movable piece 75 as shown in FIG. Increase the space between the pieces 75. As a result, the glass epoxy laminate 72
A and 72B are bent and the distance between the tips of the respective measurement terminals 71 is widened and the measurement terminals 71 are opened. A connecting rod 66 is connected to the rear end of the swing lever 64 so that the driving force from the drive unit below the base is transmitted.

A mercury relay and a rotary connector 67 are arranged on the intermittent rotating body 60. The mercury relay and rotary connector 67 have a measuring terminal 71 of a measuring probe 70 and a measuring device which are in a range of ± 45 degrees around a stop position Q2 (here, since the measured electronic component is the ring varistor 1, the electric resistance is measured). What is performed) and functions as selection switching means for selectively connecting each measuring terminal 71 to the measuring device.

The selection table 80 shown in FIGS. 1 and 2 is
It is fixed to the upper end of an intermittent rotation shaft 82 which is rotatably supported by a bearing 81 with respect to the base 110. That is, as shown in FIG. 2, the bottom frame 83 of the selection table 80 is fixed to the intermittent rotation shaft 82, and the rotary solenoid 84 is fixed to the bottom frame 83. A dish-shaped or bowl-shaped component receiver 85 for receiving the measured ring varistor 1 is fixed to the rotary shaft of the rotary solenoid 84. The rotation amount of the rotary solenoid 84 is set so that the component receiver 85, which has been directed upward, can be turned over or inverted.
It is set to about 90 to 180 degrees. The number of rotary solenoids 84 and the number of component receivers 85 are eight as shown in FIG. 1, and they are provided at intervals of 45 degrees with respect to the selection table 80.

The intermittent rotation shaft 62 of the intermittent rotation body 60 is 1
The intermittent rotation shaft 82 rotates 90 degrees in one intermittent rotation, whereas the intermittent rotation shaft 82 of the selection table 80 rotates 45 degrees in one intermittent rotation. Therefore, seven sorting boxes 86, which are fixedly arranged on the base 110 below the sorting table 80, are installed at an arrangement interval of 45 degrees (not located immediately below the stop position Q3 of the measurement probe 70). ).

In the sorting table 80, notches are formed in the upper and lower panels of the sorting table so that each component receiver 85 can receive the ring varistor 1 and then drop it into the sorting box 86. Further, a rotary connector 87 for connecting each rotary solenoid 84 to an external power source is arranged on the selection table 80.

As shown in FIG. 2, the rotational driving force of the drive motor 120, which is fixedly stored under the base 110, is transmitted to the first intermittent drive mechanism 122 via the winding transmission mechanism 121, and It is transmitted to the second intermittent drive mechanism 124 via the winding transmission mechanism 123. The output shaft of the first intermittent drive mechanism 122 rotates 45 degrees in one intermittent rotation, and is connected to the intermittent rotary shaft 82 on the sorting table side, and the output shaft of the second intermittent drive mechanism 124 is 1. It rotates 90 degrees by one intermittent rotation, and is connected to the intermittent rotation shaft 62 on the intermittent rotation body side.

Next, the overall operation of the above embodiment and the measuring method of the ring varistor 1 will be described.

The ring varistor 1 supplied from the parts feeder 40 is placed on the outer peripheral edge of the rotary table 50 via the linear supply path 40A, and the rotary table 5
Along with the continuous rotation of 0, the inner guide disk 56 and the outer guide plate 58 guide the same, and then it is transferred in an arc shape and hits the extension portion 91A of the guide member 91 in FIG. As a result,
The ring varistor 1 moves along the extension portion 91A onto the guide path 90, abuts on the stopper portion 91B, and is moved and stopped at the changing position P. At the transfer position P, since the push-up rod 100 stands by at the same height as the guide path 90, the ring varistor 1 is placed on the upper end face of the push-up rod. Even if the ring varistor 1 is connected to the rotary table 50, the propulsive force of the ring varistor 1 is only the friction generated between the ring varistor 1 and the rotary table 50, and the ring varistors do not overlap with each other.

When the head 78 of the measuring probe 70 stopped at the stop position Q1 is pushed down by the roller 65 at the tip of the swing lever 64, each measuring terminal 71 of the measuring probe 70 at the stop position Q1 is moved to the position shown in FIGS. As described above, the push-up rod 100 at the changing position P is moved to the ascending position in synchronization with this, and the ring varistor 1 mounted on the upper end surface thereof is positioned between the measuring terminals 71. After that, the tip of the swing lever 64 rises, the measurement probe 70 at the stop position Q1 is closed, and the ring varistor 1 is held between the measurement terminals 71. The measuring probe 70 at the stop position Q3 also opens and closes in synchronization with the stop position Q1.

The ring varistor 1 held by the measuring probe 70 at the stop position Q1 is transferred in the order of the stop position Q2 and the stop position Q3 with the intermittent rotation of the intermittent rotating body 60 every 90 degrees. The electrical characteristics of the ring varistor 1 are measured by connecting the measurement terminal 71 of the measurement probe 70 in the range of less than ± 90 degrees (before leaving Q3 before arriving at Q3) about the stop position Q2 to the mercury relay and rotary connector 67. Connected to the measuring instrument via.

The measuring method of the ring varistor 1 here is roughly classified into a first method and a second method.

First, the first method will be described with reference to FIGS. 9 to 14. In these figures, 1 is a ring varistor, which is an annular ceramic body 30 having a constant thickness.
On the outer peripheral surface (circumferential surface) of the three side electrodes 31A, 31B,
31C is formed, and there is an inter-electrode gap 32 where the ceramic base is exposed between the side electrodes. The measuring terminals 71 arranged at five 72-degree divisions of the measuring probe 70 are denoted by the reference symbols.

(A) In the temporary measurement, FIG. 9 and FIG.
When the adjacent measurement terminals contact the adjacent electrodes 31A and 31B, as shown in FIG.
The measurement terminal on the opposite side of is in contact with a different electrode 31C. This state will be referred to as "OK mode". (B) In the temporary measurement, as shown in FIG. 11 and FIG.
When the adjacent measurement terminals contact one electrode 31A, the adjacent measurement terminals and the measurement terminals on both sides of the adjacent measurement terminal respectively contact different electrodes 31B and 31C. This state is called "short mode". (C) In the temporary measurement, as shown in FIGS. 13 and 14,
When one of the adjacent measurement terminals is in contact with the electrode 31A and the other is in contact with the inter-electrode gap 32, the adjacent measurement terminals, and the measurement terminals on both sides of the adjacent measurement terminals, are in contact with different electrodes 31B and 31C, respectively. There is. This state is called "open mode".

As described above, the side electrodes 31A and 31A are provided for the measurement terminals and adjacent measurement terminals among them.
When the methods of contacting B and 31C are sorted out, the three modes of (a), (b), and (c) above are obtained. Therefore, in the tentative measurement, the measuring device and the adjacent measuring terminal are connected via the mercury relay and the rotary connector 67, and a constant current is passed between the adjacent measuring terminals to measure the voltage value. Set the voltage value in "OK mode" to 100
Then, the "short mode" is 0-1 and the "open mode" is 200-300, and the contact mode can be specified from this voltage value. That is, when appropriate upper and lower limits are set and the measured voltage value is (lower limit value) <(measured voltage value) <(upper limit value), it is judged as "OK mode" and (measured voltage value) ≤
When (lower limit value), it is judged as "short mode", and when (upper limit value) ≤ (measured voltage value), it is judged as "open mode".

After the contact mode is specified by the temporary measurement,
The electric resistance between the side surface electrodes 31A, 31B, 31C is measured. In the “OK mode”, the side surface electrode 31A has a measurement terminal (becomes the first pole), the side surface electrode 31B has a measurement terminal (becomes the second pole), and the side surface electrode 31C has the measurement terminal (becomes the third pole). Since they are in contact, switch the mercury relay and rotary connector 67 to
The electrical resistance between the measuring terminals is measured, then the electrical resistance between the measuring terminals is measured, and then the electrical resistance between the measuring terminals is measured.

In the "short mode", the side electrode 31A
The measurement terminal and (becomes the first pole) are the side surface electrodes 31B.
Since the measurement terminal (which becomes the second pole) is in contact with the side surface electrode 31C and the measurement terminal (which becomes the third pole), the mercury relay and the rotary connector 67 are switched, and the electrical resistance between the measurement terminal and-is changed. Measurement, then measurement of electrical resistance between measurement terminals, and then measurement terminals
Conduct electrical resistance measurement between and.

In the "open mode", the side electrode 31A
The measurement terminal or (becomes the first pole) is the side electrode 31
Since the measurement terminal (to be the second pole) is in contact with B and the measurement terminal (to be the third pole) is in contact with the side surface electrode 31C, the mercury relay and the rotary connector 67 are switched to switch between the measurement terminals and −. Conduct resistance measurement, then measure electrical resistance between measurement terminals, and then
Conduct electrical resistance measurement between and.

Next, the second method will be described with reference to FIGS. This second method is the ring varistor 1
There is always a place where two adjacent measuring terminals are in contact with one side electrode, and the fact that the measuring terminals on both sides of the adjacent measuring terminal are respectively in contact with different side electrodes is utilized. For example, in the case of FIG. 15, adjacent measurement terminals are in contact with one electrode 31B, and at this time, the measurement terminals on both sides are in contact with different electrodes 31A and 31C, respectively. In the case of FIG. 16, adjacent measuring terminals are in contact with one electrode 31C, and at this time, the measuring terminals on both sides are in contact with different electrodes 31B and 31A, respectively. Further, in the case of FIG. 16, the adjacent measuring terminals are 1
It can be considered that one electrode 31A is in contact, and the measurement terminals on both sides are in contact with different electrodes 31B and 31C, respectively. In the case of FIG. 17, the adjacent measurement terminals are in contact with one electrode 31B, and the measurement terminals on both sides are in contact with different electrodes 31A and 31C.

Therefore, in the tentative measurement, first, the measuring terminal is connected to the measuring instrument via the mercury relay and the rotary connector 67, a constant current is passed between both measuring terminals to read the voltage value, and the value is below the set value. If it is less than the set value, it is determined that the measuring terminal is in contact with one electrode, and this is the first pole. Therefore,
In the subsequent measurement of the electric resistance, the measurement terminal (which becomes the first pole) and the measurement terminals (which become the second pole) on both sides of the measurement terminal,
Select the measurement terminal (which will be the third pole), switch the mercury relay and rotary connector 67, and
-Measure the electrical resistance between
The electrical resistance between the measuring terminals is measured.

If the voltage value when a constant current is applied between the measuring terminals is larger than the set value, a constant current is applied in the order of measuring terminals-,-,-,-. The place where the value is less than the set value is specified and defined as the first pole, and the measurement terminals on both sides are selected to make the second pole.
As the pole and the third pole, the same electric resistance measurement as in the above case is performed.

The measurement of the electrical characteristics of the ring varistor 1 described above is performed after the measurement probe 70 attached to the intermittent rotating body 60 departs from the stop position Q1 and before it reaches the stop position Q3 after passing through the stop position Q2. The ring varistor 1 after the measurement is completed is
It reaches the stop position Q3 by intermittent rotation every degree. At this time,
Since the selection table 80 performs intermittent rotation every 45 degrees in synchronization with the intermittent rotation of the intermittent rotation body 60, the stop position Q3.
The component receiver 85 on the side of the sorting table is on the standby position right below. Then, the roller 65 at the tip of the swing lever 64
, The head portion 78 of the measurement probe 70 stopped at the stop positions Q1 and Q3 is pushed down, and the measurement terminals 71 of the measurement probe 70 at the stop positions Q1 and Q3 are opened as shown in FIGS. 7 and 8.
As a result, the measured ring varistor 1 held by the measuring probe 70 at the stop position Q3 drops onto the component receiver 85 on the sorting table side.

The seven sorting boxes 86, which are fixedly arranged below the sorting table 80, can be sorted according to the measurement result of the electrical characteristics of the ring varistor 1, for example, the variation from the set characteristic value. Sorting boxes are assigned according to the degree, and one defective box is also assigned. The ring varistor 1 dropped on the parts receiver 85 on the sorting table side is sequentially moved onto the sorting box 86 having an arrangement interval of 45 degrees by intermittent rotation of the sorting table 80 every 45 degrees, and corresponds to the measurement result. When stopped on the sorting box, the component receiver 85 is turned over or inverted by the rotary solenoid 84 and falls into the sorting box.

According to the configuration of the above embodiment, the following effects can be obtained. (1) Temporary measurement is performed by bringing all the measurement terminals of the measurement probe 70 having the number of measurement terminals 71 larger than the number of electrodes of the ring varistor 1 as the electronic component to be measured into contact with the outer peripheral surface of the ring varistor 1 to perform temporary measurement. The electrical characteristics can be measured by specifying the measurement terminal in contact with the electrode of the ring varistor 1 based on the measurement result. Therefore, the centering (step of aligning the electrode positions) by the photoelectric sensor of the ring varistor 1 which is required in the conventional device is not necessary, and the mechanism can be simplified and malfunction can be eliminated. In addition, the measurement yield can be improved by reducing the contact error of the measurement terminals. (2) It is possible to bring the measurement tact and the device tact close to each other by providing a plurality of measurement probes 70 on the intermittent rotating body 60 and sequentially switching the measurement probes 70 connected to the measuring device to perform measurement. . That is, since the relationship between the mechanical operation time (the operation time of the intermittent rotating body 60) and the measurement time progresses in parallel, the device tact (processing tact).
The ring varistor 1 can be easily lifted up, and the mechanism part for transferring the ring varistor 1 only needs one line. The ring varistor 1 transfer mechanism is simple and space saving and maintainability can be improved. For example, in the conventional apparatus, it takes a long time to carry the ring varistor 1 and to open / close the measurement terminal in the measuring unit, and the processing tact takes about 0.84 seconds, but in the present embodiment, the processing tact is 0.3 seconds. It can be shortened to some extent. As a result, the number of lines that was 140 / min in the conventional 2 lines (alternate processing) was 20
The processing capacity can be improved to 0 / minute. (3) Since the glass epoxy laminated plates 72A and 72B having flexibility are used in the mechanism portion that supports each measurement terminal 71 of the measurement probe 70 so as to be openable and closable, the mechanism of the measurement probe 70 can be simplified. That is, FIG.
2 and the measurement probe 20 of FIG.
A large number of parts such as the open / close arm 23, the insulating plate 24, and the coil spring 28 are required, and it is difficult to reduce the size when the number of measurement terminals is increased, whereas the measurement probe 70 used in the present embodiment is difficult. Glass epoxy laminate 72A, 72B
Has excellent durability of spring characteristics, links, arms,
Since it can have four functions of a spring and an insulating material, the number of parts can be reduced and the size can be reduced. Furthermore, since the two glass epoxy laminated plates 72A and 72B are used in parallel, the measurement terminals 71 are opened and closed in parallel as shown in FIGS. 5 and 7, so that the diameter of the ring varistor 1 is different. There is no change in contact. In addition, since the measurement terminal 71 is made of hardened steel without surface treatment, a change in contact resistance due to wear does not occur and stable measurement can be performed. (4) Since the ring varistor 1 is excluded from being connected in the linear supply path 40A of the parts feeder 40 and the ring varistor 1 is connected in the rotary table 50, the ring varistor 1 is connected to the linear supply path 40A by vibration.
The phenomenon of overlapping and clogging can be eliminated. Further, it is not necessary to use vacuum suction when transferring the ring varistor 1, and it is possible to prevent the occurrence of a failure due to the vacuum suction, thereby improving the operational reliability.

In the above embodiment, the ring varistor 1 having three side surface electrodes is measured.
The present invention can also be applied to the case of measuring the electrical characteristics of a ring-shaped or disk-shaped electronic component having two or four or more side electrodes. In addition to the electric resistance, the content of measurement may be such that the capacitance is measured when the electronic component is a capacitor, and the inductance may be measured when the electronic component is an inductor.

[0053]

As described above, according to the present invention,
All of the measurement terminals, which are larger in number than the number of electrodes on the outer peripheral surface, are brought into contact with the outer peripheral surface of the electronic component for temporary measurement, the electrode positions on the outer peripheral surface are recognized by the temporary measurement, and the electrodes that need to be measured are contacted. You can select the measuring terminal that is connected to the measuring instrument to measure the characteristics of electronic parts, speeding up the processing speed,
The mechanism can be simplified, the occurrence of failures can be reduced, and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an electronic component measuring method and apparatus according to the present invention.

FIG. 2 is a front sectional view of the same.

FIG. 3 is a plan view showing a rotary table and a mechanism around the rotary table in the embodiment.

FIG. 4 is a perspective view of an intermittent rotating body and a measurement probe as seen from below, according to an embodiment.

FIG. 5 is a front cross-sectional view of a measurement probe used in an example in a closed state.

FIG. 6 is a bottom view showing the arrangement of measurement terminals of the measurement probe in the closed state.

FIG. 7 is a front sectional view of a measurement probe used in an example in an open state.

FIG. 8 is a bottom view showing the arrangement of measurement terminals of the measurement probe in the opened state.

FIG. 9 is an explanatory diagram showing an example when the “OK mode” is set in the first measurement method.

FIG. 10 is an explanatory diagram showing another example when the “OK mode” is set in the first measurement method.

[FIG. 11] “Short mode” in the first measurement method
It is explanatory drawing which shows an example in case of becoming.

[Fig. 12] "Short mode" in the first measurement method
It is explanatory drawing which shows the other example in case of becoming.

[Fig. 13] "Open mode" in the first measurement method
It is explanatory drawing which shows an example in case of becoming.

[Fig. 14] "Open mode" in the first measurement method
It is explanatory drawing which shows the other example in case of becoming.

FIG. 15 is an explanatory diagram showing a first state in the second measuring method.

FIG. 16 is an explanatory diagram showing a second state in the second measuring method.

FIG. 17 is an explanatory diagram showing a third state in the second measuring method.

FIG. 18 is a plan view showing a conventional measuring apparatus for electronic components.

FIG. 19 is a cross-sectional view of essential parts showing a centering part in a conventional device.

FIG. 20 is a plan view of the ring varistor transferred to the centering unit.

FIG. 21 is an enlarged sectional view of a centering portion.

FIG. 22 is a front cross-sectional view of the measurement probe of the conventional apparatus in a closed state.

FIG. 23 is a front cross-sectional view of the measurement device of the conventional device in an open state.

FIG. 24 is a plan view of a ring varistor as a measured electronic component.

[Explanation of symbols]

 1 ring varistor 40 parts feeder 40A straight line supply path 41 hopper 50 rotary table 56 inner guide disc 58 outer guide plate 60 intermittent rotor 67 mercury relay and rotary connector 70 measuring probe 71 measuring terminal 72A, 72B glass epoxy laminated plate 80 sorting table 84 Rotary Solenoid 85 Component Receiver 86 Sorting Box 90 Guideway 91 Guide Member 91A Extension 91B Stopper 100 Push-up Rod 110 Base P Transfer Change Position Q1, Q2, Q3, Q4 Stop Position S1, S2 Optical Sensor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // H01L 21/66 B 7377-4M

Claims (6)

[Claims] 1. An electronic component having a plurality of electrodes on its outer peripheral surface is temporarily contacted with all the measuring terminals of a measuring probe having a larger number of measuring terminals than the plurality of electrodes. And a measurement terminal in contact with each electrode is electrically selected according to the result of the tentative measurement, and the characteristic between the electrodes or between the specific electrodes is measured. 2. A parts feeder for sequentially sending electronic parts having a plurality of electrodes on the outer peripheral surface, a rotary table for receiving the electronic parts sent from the parts feeder, and a transfer of the electronic parts transferred by the rotary table. It has a guide member for guiding to the changing position, a pushing-up member on which the electronic component arrived at the shifting position is placed, and a number of measuring terminals larger than the number of the plurality of electrodes, and the pushing-up member is in the rising position. A measuring device for electronic parts, comprising: a measuring probe for sandwiching the electronic part; and a selection switching means for selectively connecting each measuring terminal to a measuring instrument. 3. A parts feeder for sequentially sending electronic parts having a plurality of electrodes on the outer peripheral surface, a rotary table for receiving the electronic parts sent from the parts feeder, and a transfer of the electronic parts transferred by the rotary table. It has a guide member for guiding to the changing position, a pushing-up member on which the electronic component arrived at the shifting position is placed, and a number of measuring terminals larger than the number of the plurality of electrodes, and the pushing-up member is in the rising position. Measuring probe for sandwiching the electronic component, selection switching means for selectively connecting each of the measuring terminals to the measuring device, a rotary driven sorting table, a rollover or inversion means attached to the sorttable, and the rollover table. Or a component receiver attached to the reversing means,
An electronic device comprising a plurality of sorting boxes, wherein the electronic component measured by the measuring probe is received by the component receiver, and the component receiver is turned over or inverted on a specific sorting box corresponding to a measurement result. Measuring device for parts. 4. A plurality of the measurement probes are attached to an intermittent rotator, from sandwiching an electronic component at the transfer position to releasing the electronic component at a release position where the component receiver stands by. The electronic component measuring apparatus according to claim 2, wherein the measurement of the electronic component is executed during the period. 5. The measuring probe according to claim 2, 3 or 4, wherein the measuring terminals are attached to the main body portion at equal angular intervals through a flexible plate member, and the opening and closing means opens and closes the measuring terminals. Measuring device for the electronic components described. 6. The electronic component measuring apparatus according to claim 5, wherein the flexible plate member is formed of a glass epoxy laminated plate.