JP2950488B2 - Device for measuring characteristics of toroidal multipolar electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a characteristic measuring device used for inspecting the electrical characteristics of electronic components, and more particularly, to a contact terminal suitable for inspecting the characteristics of an annular multipolar electronic component such as a ring varistor. The present invention relates to a device for measuring characteristics of an annular multipolar electronic component provided.

[0002]

2. Description of the Related Art In general, after an electronic component is manufactured, a predetermined electrical measurement is performed while a measuring terminal is in contact with an electrode portion to determine its quality in order to inspect its electrical characteristics. I have. In order to inspect such electrical characteristics, there is known a characteristic measuring device that lowers a measurement terminal at a predetermined position and automatically inspects the electrical characteristics while transporting the electronic component to be measured onto a transport table. .

On the other hand, among the electronic components to be measured, as shown in FIG. 3, for example, an annular component main body b is provided with a fan-shaped electrode c, c. There is a ring-type electronic component such as a multipolar electronic component a, a so-called ring-type varistor. In the measurement of the electrical characteristics of such a ring-type electronic component, first, a varistor is put into a parts feeder, front / back determination is made in a plate of the parts feeder, and a fan-shaped electrode surface divided into three equal parts is formed. Is supplied upward onto the transport table of the measuring device. The varistor supplied on the transport table is then intermittently transported to a measuring station in the measuring device, where it is measured by the above-mentioned measuring terminals, and as a result, pass / fail judgment is made to separate.

[0004] By the way, in the conventional measuring device 1, as shown in FIG. 4, the electrode position of the varistor a cannot be aligned, so that the measurement can be performed in any direction. Are provided with two sets of measuring terminals. That is, the terminal holder is provided with six measuring terminals 2, 2... Arranged in equal divisions into six, and three measuring terminals arranged at intervals of 120 degrees as one set.
A set of measurement terminals is configured. In such a conventional measuring device, if two sets of measuring terminals are lowered and contacted,
This is based on the idea that any one of them always contacts the electrode of the component to be measured, so that it is possible to reliably measure the electrical characteristics while obtaining a good contact state.

According to, for example, Japanese Utility Model Application Laid-Open No. 63-70082, a contact terminal for measuring the electrical characteristics of a varistor having a fan-shaped electrode divided into three equal parts is used. Instead of pin-shaped contact terminals, long terminals are arranged radially, and these long terminals are in contact with the fan-shaped electrode surface of the varistor, and there is a known contact terminal for a ring-shaped multipolar electronic component. Have been.

[0006]

However, according to the above-described prior art structure, the position where the measuring terminal contacts the electrode is determined only stochastically. That is,
A case where the measuring terminal comes off the center of the electrode and comes into contact with the vicinity of the boundary surface of the electrode occurs with probability. In this case, further, other factors such as non-uniformity of the electrode position on the component may overlap, and the reliability of the contact of the measuring terminal may be reduced, and therefore, the measurement accuracy cannot be improved. There was a point.

[0007] In view of the above-mentioned problems in the prior art, the present invention provides a fan-shaped electrode formed on the main surface of an annular multipolar electronic component by dividing the main surface into a plurality of pieces at equal angles. It is an object of the present invention to provide a device for measuring the characteristics of an annular multipolar electronic component which can make contact with high reliability and prevent a decrease in measurement accuracy due to non-uniformity of an electrode contact position of a measurement terminal. is there.

[0008]

According to the present invention, there is provided a fan-shaped electrode divided at equal angles on a main surface of an annular component body whose electric characteristics are to be measured. In the characteristic measuring device for an annular multipolar electronic component provided with one or one set of measuring terminals for electrode contact at equal angular intervals in the circumferential direction, the fan-shaped electrodes of the component body A color identification sensor for sensing a boundary surface between the electrodes by its color, and a rotating means for rotating and moving the electrode contact measurement terminal by a predetermined angle from the boundary surface between the electrodes detected by the color identification sensor. A device for measuring the characteristics of the provided annular multipolar electronic component has been proposed.

[0009]

In other words, according to the configuration of the characteristic measuring device for an annular multipolar electronic component proposed by the present invention, the measuring terminal is located at the boundary of the fan-shaped electrode formed on the main surface of the component main body by the color identification sensor. The surface is sensed, and the measurement terminal is rotated and lowered by a predetermined angle from the boundary surface to make contact with the electrode, so that a good contact state with the electrode is reliably obtained, and the measurement terminal is connected to the electrode. It is possible to reliably prevent a decrease in measurement accuracy due to a no-contact state that occurs without contact or a contact near the boundary of an electrode, thereby enabling stable measurement of electrical characteristics.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 shows an apparatus for measuring characteristics of an annular multipolar electronic component according to an embodiment of the present invention. In FIG.
An air cylinder 40 that can move up and down (indicated by an arrow in the figure) is provided, and a drive shaft 41 that projects below
A measurement terminal holder 50 having a plurality of electrode contact measurement terminals 51, 51,. In this measuring terminal holder 50, the measuring terminal 5
1, 51... Are implanted as a set of two adjacent to one place in 30 equal parts, and a total of six measurement terminals are provided.

Further, an electric motor 31 provided above the cylindrical mounting holder 30 rotates an air cylinder 40 and a measuring terminal holder 50 therein.

As shown in FIG. 1, a disc-shaped transfer table 60 is provided below the air cylinder 40 so as to be rotatable in the direction of the arrow. A plurality of circular storage grooves 61, 61... For storing an annular multipolar electronic component a such as a varistor whose electrical characteristics are to be measured are formed therein. That is, for example, a varistor a sequentially supplied by a parts feeder or the like.
Are the storage grooves 61 of this disk-shaped transfer table 60.
While being rotated in the direction of the arrow in the figure, is conveyed to a measuring station S formed below the air cylinder 40.

According to the present invention, adjacent to the measuring station S, that is, the disk-shaped transfer table 60,
Before the varistors a, a... Are stored and moved to the measuring station S, a discrimination station C for confirming the position of the surface electrode of the varistor a is formed. A color identification sensor 70 is provided above the determination station C in a direction facing the electrode forming surface of the varistor a (downward in this embodiment). The color identification sensor 70 is a sensor for identifying electrodes c, c,... Formed in a fan shape by being equally divided on the surface of the varistor a, and adjacent surfaces between the electrodes. That is, when the color identification sensor 70 detects white, the electrode c of the varistor a is detected. On the other hand, when the sensor 70 detects black, the varistor element b displayed on the adjacent surface between the electrodes c and c is detected. Identify. Also, this color identification sensor 70
For example, in the measurement station S, the measurement terminal S is disposed at a position corresponding to one measurement terminal 51 of the measurement terminal holder 50.

Next, the operation of the above-described device for measuring characteristics of an annular multipolar electronic component of the present invention will be described. As described above, the varistors a whose electrical characteristics are to be measured are sequentially inserted into the storage grooves 61 of the disk-shaped transfer table 60 by, for example, a parts feeder. While rotating, it is first transported to the discrimination station C. At this time, when white color is detected by the color identification sensor 70 of the discrimination station C, in the subsequent measurement station S, the air cylinder 40 in the cylindrical mounting holder 30 is moved downward as it is, and attached to the tip of the drive shaft 41. Are brought into contact with the electrodes c, c,... Of the varistor a conveyed downward, and a measurement operation of predetermined electrical characteristics is performed.

On the other hand, when the color discrimination sensor 70 detects black in the discrimination station C, the motor 31 provided above the cylindrical mounting holder 30 causes the opening angle of the fan-shaped electrode to 12 in the subsequent measurement station.
It rotates in the direction of the arrow by 60 degrees, which is half of 0 degrees. afterwards,
Similarly to the above, the air cylinder 40 in the cylindrical mounting holder 30 is moved downward, and the electrode contact measuring terminal 5 of the measuring terminal holder 50 attached to the tip of the drive shaft 41 is moved.
1, 51... Are brought into contact with the electrodes c, c.

That is, according to the characteristic measuring apparatus for an annular multipolar electronic component of the present invention,
The transfer position of the varistor a is confirmed by the color identification sensor 70, that is, when the sensor 70 detects white, it is determined that the measurement terminal 51 is on the electrode c of the varistor a, and that the measurement terminal 51 is black. By sensing, it is detected that the measurement terminal 51 is located between the electrodes c and c of the varistor a, that is, near the boundary surface between the electrodes c and c. Then, based on this detection result, the motor 31 provided above the cylindrical mounting holder 30 is rotated by a predetermined angle, in the above embodiment, by 60 degrees when black is detected, and the measuring terminal 51 is securely rotated. This ensures contact with the electrode c of the varistor a.

In the above embodiment, only the electrical characteristic measuring device of the varistor a provided with three electrodes c, c... On the surface has been described, but the present invention is not limited to this. For example, it is apparent that the present invention can be applied to a multipolar electronic component having four or more electrodes. In this case, for example, in a varistor provided with four electrodes, it is clear that the motor 31 only needs to be rotated by 45 degrees when the color identification sensor detects black. Further, the mounting position of the color identification sensor does not necessarily have to correspond to the position of the measurement terminal, but may be sufficient if it is mounted at a location having a predetermined positional relationship. For example, this color identification sensor is connected to the measurement terminal 51,
In the case where the sensor is attached to the center between the sensors 51, the measurement terminal 51 may be lowered as it is when the sensor senses black, while it is rotated by a predetermined angle (60 degrees) when it is white. Let go down.

Further, in the above-described embodiment, the measuring terminal holder 50 is used in order to more securely contact the measuring terminals.
Include, but two adjacent three such split is set and turned a total of six measurement terminals 51, 51 are ... are implanted, instead of this, the one to three such split, total Similar effects can be obtained with three measurement terminals.

[0019]

As described above, according to the device for measuring the characteristics of an annular multipolar electronic component of the present invention, the position of the electrode of the annular multipolar electronic component whose electrical characteristics are to be measured is detected. By rotating the motor 31 provided above the cylindrical mounting holder 30 based on the detection result, the lowering position of the measuring terminal is securely brought into contact with the electrode position of the annular multipolar electronic component on the carrier plate. It is possible to reliably prevent a decrease in measurement accuracy due to a contactless state that occurs without the measurement terminal coming into contact with the electrode or a contact near the boundary of the electrode, enabling stable measurement of electrical characteristics. .

[Brief description of the drawings]

FIG. 1 is a partially enlarged perspective view for explaining a main part of an apparatus for measuring characteristics of an annular multipolar electronic component according to an embodiment of the present invention.

FIG. 2 is an overall perspective view showing an overall appearance of the device for measuring characteristics of an annular multipolar electronic component.

FIG. 3 is a perspective view for explaining a structure of an annular multipolar electronic component for measuring electric characteristics by the measuring device.

FIG. 4 is an explanatory diagram of a method for measuring characteristics of an annular multipolar electronic component according to a conventional technique.

[Explanation of symbols]

 Reference Signs List 30 cylindrical mounting holder 31 motor 40 air cylinder 50 measuring terminal holder 51 measuring terminal 60 transfer table 61 storage groove 70 color identification sensor a varistor b component body (between electrodes) c electrode S measurement station C determination station

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01R 31/00 G01R 31/28-31/3193 G01R 1/06

Claims (1)

(57) [Claims] 1. An electrode having an angular number equal to an integral multiple of a fan-shaped electrode divided at equal angles on a main surface of an annular component main body whose electrical characteristics are to be measured. In a characteristic measuring device for an annular multipolar electronic component provided with one or a set of measuring terminals for contact, a color identification sensor for sensing a boundary surface between fan-shaped electrodes of the component main body with its color is provided, A rotating means for rotating the electrode contact measuring terminal by a predetermined angle from a boundary surface between the electrodes sensed by the color identification sensor;