JPS6281580A - Apparatus for detecting abnormal insert of electronic parts - Google Patents

Abstract

PURPOSE:To manage with the number of amplifying means by the number of groups, in an abnormal insert detection apparatus for detecting the insert state of electronic parts having a large number of leads, by dividing a large number of leads into groups and collectively amplifying the detection signals in each group. CONSTITUTION:When only one of the lead terminals 2 of electronic parts 1 is not inserted or bent, the light from a light emitting fiber 8 reaches a light receiving fiber 9 to detect abnormality. If a detection signal is applied from the light receiving fiber connected in correspondence to, for example, the amplifying means 10b among amplifying means divided into groups, an abnormality detection signal is transmitted to a control circuit 11 from the amplifying means 10b and the electronic parts 1 is detached, for example, by a suction chuck and again inserted in a terminal hole 4 or new electronic parts is sucked to be inserted in a predetermined terminal hole. By this constitution, the purpose is achieved by the number of amplifying means divided into groups and the number of the constitutional elements of the detection apparatus can be reduced extremely.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is applicable to the case where an electronic component having multiple lead terminals, such as an integrated circuit (IC), is attached to a predetermined location on a printed circuit board.
The present invention relates to an abnormal insertion detection device for an electronic component that detects whether lead terminals of the electronic component are normally attached to the printed circuit board.

(b) Conventional technology Leadless components, generally called chip components, are removed from the tape on a tape reel by suction using a vacuum chuck, and after regulating the position in the normal direction, are mounted on the copper foil position of a printed circuit board. Although I will not go into details, during this process, it is possible to detect only the presence or absence of the chip component by using a transmission method or a reflection method to determine whether or not the chip component is attracted by the vacuum chuck and whether or not it is attached to the printed circuit board. That's enough.

However, when attaching an electronic component with leads to the printed circuit board in the same way, even if the electronic component is taken out from the tape on the tape reel using a chuck mechanism such as a vacuum chuck and attached to a predetermined position on the printed circuit board in the same manner as described above,
In particular, when the electronic component has a plurality of lead terminals, all of the plurality of lead terminals must pass through the mounting holes of the printed circuit board normally.

Therefore, Japanese Patent Laid-Open No. 58-218200 is cited as an example of detecting whether a lead terminal of the electronic component is inserted and penetrated at a predetermined position on a printed circuit board. In this conventional example, a photoelectric conversion element is provided on the tip side of the terminal (1) above, and detects an abnormal insertion state, that is, if there is a part where the tip is not inserted, or if the tip is abnormally bent. It is configured to do this.

←→ Problems to be Solved by the Invention According to the conventional configuration described above, when detecting whether or not a lead terminal of an electronic component is correctly inserted into a predetermined hole of a printed circuit board, the lead terminal of an IC, etc. In an electronic component having a large number of lead terminals, if one attempts to detect the insertion state of all lead terminals, a large number of amplification means are required on the output side of each detection element, which has the disadvantage of increasing the cost of the entire detection device. there were.

The present invention provides an abnormal insertion detection device for an electronic component that detects the inserted state of the lead terminals by a photoelectric element after inserting the electronic component having a plurality of lead terminals into a printed circuit board. ,
The plurality of lead terminals are divided into a plurality of groups, and an output end of a detection means having a photoelectric element provided corresponding to each of the lead terminals is connected to an input end of an amplification means provided corresponding to the group. , the output end of the amplifying means is added to the control circuit.

(E) Effect In the configuration of the present invention, due to the grouping described above, amplification means corresponding to each group are sufficient, and there is no need to provide amplification means for all the detection elements.

(f) Example The present invention will be described with reference to the drawings. Fig. 1 is a configuration diagram showing the light receiving section of the abnormal insertion detection device for electronic components of the present invention, and Fig. 2
The figure is a perspective view of a main part of the same device, and FIG. 3 is a first configuration diagram showing a part of the same device in FIG. 1.

In the drawing, (1) indicates a plurality of lead terminals (21 (21
An electronic component having..., (3) is a terminal hole (41 (41
A printed circuit board having..., (5) a group of light emitting diodes (LEDs) as light emitting elements, (6) a group of phototransistors as light receiving elements, (7) an LED driver, (8) (8)... - is a light emitting fiber that transmits light from the LED group, (909)... is a light receiving fiber that transmits light from the LED group to the phototransistor, (10a) (]0b) (]0c )(1('
) d) (10e) is the amplification means, 01) is the control circuit, (1
2a) (12N-(12e) is a detection element.

Next, to explain the configuration and operation of the device of the present invention, lead terminals (21(2+...) of the electronic component (1) are connected to predetermined terminal holes (41(4)...) of the printed board (3).
Insert.

After that, as shown in Figure 2, the light emitting fiber (8) (8
1... and the light-receiving fibers (9) (9)..., if the lead terminal (21 (2)... exists, that is, is inserted normally, the LED group (5 ) is blocked by the lead terminals and does not reach the detection elements (12a), (12b), etc., including phototransistors.
An output corresponding to the normal state is applied to the control circuit α℃, and the normal operation, that is, the installation of other electronic components following the electronic component, or the next step after the completion of the component installation, that is, the printed circuit board. Discharge and soldering proceed to the process.

On the other hand, the lead terminals (2) (21...) of the electronic component (1)
・If even one of them is not inserted or is bent, the light emitting fiber (8) (8)...
When the light reaches the light-receiving fibers (9), (9), etc., an abnormality is detected, and a detection signal is generated from the light-receiving fiber connected correspondingly to the amplification means (10b) among the grouped groups. is added, the amplification means' (10b)
An abnormality detection signal is transmitted from the control circuit αB to the control circuit αB, and the output of the control circuit 01) controls, for example, a chuck mechanism (not shown) for sucking the electronic component (1-1).
) is re-adsorbed and removed, and the terminal hole (4) (4j...
or insert a new electronic component into the predetermined terminal hole.

In the above example, both the light emitting fiber and the light receiving fiber are placed in positions that sandwich the lead terminal, but the light emitted from the tip of the light emitting fiber is reflected to the lead terminal, and the light emitting fiber is focused by the light receiving fiber. l-) transistor (6
) group, and if there is reflected light, it is considered to be a normal state, and if there is no reflected light, it is considered to be an abnormal state.The detected output is applied to the amplification means (10a), (10b), etc., and is divided into the groups. In the embodiment shown in FIG. 1, if an abnormal state is detected in even one of the five groups, the control circuit 0
]) to control the chuck mechanism or proceed to the process of ejecting the printed circuit board or soldering it.

Here, as an electronic component, dual in-line type, 4...
Taking a cage (referred to as DIP) IC as an example, the lead terminals are 8 pins, 14 pins, I6 pins, 18 pins, and 20 pins.
In the example of 20 bins, if it is divided into 5 blocks, then if it is divided into 4 blocks each, the detection outputs of those 4 should be applied to the amplification means via an OR circuit or an AND circuit, or the output of the amplification means should be If the side is added to the control circuit through an OR circuit or an AND circuit, if an abnormality is detected, the chuck mechanism will be stopped or the chuck mechanism will be installed normally as described above, depending on the control signal from the logic output of NO or low level. You can re-insert it as shown below.

(G1 Effects of the Invention According to the device for detecting abnormal insertion of an electronic component of the present invention, an electronic component having a plurality of lead terminals is passed through a predetermined terminal hole of a printed circuit board, and it is detected whether or not it is inserted normally. After applying the signal to each grouped amplification means, the output of the amplification means is used to control a control circuit, such as a microprocessor, controller, etc. (abbreviated as CPU), as well as a chuck mechanism for mounting electronic parts. The number of amplifying means divided into groups is sufficient, and the number of constituent elements of the detection device can be extremely reduced, leading to cost reduction.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a device for detecting abnormal insertion of electronic components according to the present invention, FIG. 2 is a partially sectional perspective view of the device, and FIG. 3 is a block diagram showing a portion of the device in FIG. 1. Explanation of main drawing numbers (1)...Electronic components, (2)...Lead terminals, (
3)...Printed circuit board, (4)...Terminal hole, (
5)...LED#, (6)...phototransistor group, (8)...light emitting fiber, (9)-=light receiving fiber, (10a) (1 (lb) (10c)
) (10d) (10e) - amplification means, αυ... control circuit, (12a) (12b) (12c) (12d) (1
2e) - Detection element. Figure 1 1/-1 Figure 2

Claims (1)

[Claims] (1) In an electronic component abnormal insertion detection device that detects the insertion state of the lead terminals using a photoelectric element after inserting an electronic component having a plurality of lead terminals into a printed circuit board, the plurality of lead terminals are divided into a plurality of groups. The output end of a detection means having a photoelectric element provided corresponding to each of the lead terminals is connected to the input end of an amplification means provided corresponding to the group, and the output end of the amplification means is connected to a control circuit. A device for detecting abnormal insertion of electronic components.